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* elf64-ppc.c (is_static_defined): New function.
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_process_dot_syms
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115 #define elf_backend_post_process_headers _bfd_elf_set_osabi
116
117 /* The name of the dynamic interpreter. This is put in the .interp
118 section. */
119 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
120
121 /* The size in bytes of an entry in the procedure linkage table. */
122 #define PLT_ENTRY_SIZE 24
123
124 /* The initial size of the plt reserved for the dynamic linker. */
125 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
126
127 /* TOC base pointers offset from start of TOC. */
128 #define TOC_BASE_OFF 0x8000
129
130 /* Offset of tp and dtp pointers from start of TLS block. */
131 #define TP_OFFSET 0x7000
132 #define DTP_OFFSET 0x8000
133
134 /* .plt call stub instructions. The normal stub is like this, but
135 sometimes the .plt entry crosses a 64k boundary and we need to
136 insert an addi to adjust r12. */
137 #define PLT_CALL_STUB_SIZE (7*4)
138 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
139 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
140 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
141 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
142 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
143 /* ld %r11,xxx+16@l(%r12) */
144 #define BCTR 0x4e800420 /* bctr */
145
146
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
148 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
149 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
150 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
151
152 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
153 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
154
155 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
156
157 /* glink call stub instructions. We enter with the index in R0. */
158 #define GLINK_CALL_STUB_SIZE (16*4)
159 /* 0: */
160 /* .quad plt0-1f */
161 /* __glink: */
162 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
163 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
164 /* 1: */
165 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
166 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
167 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
168 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
169 /* ld %11,0(%12) */
170 /* ld %2,8(%12) */
171 /* mtctr %11 */
172 /* ld %11,16(%12) */
173 /* bctr */
174
175 /* Pad with this. */
176 #define NOP 0x60000000
177
178 /* Some other nops. */
179 #define CROR_151515 0x4def7b82
180 #define CROR_313131 0x4ffffb82
181
182 /* .glink entries for the first 32k functions are two instructions. */
183 #define LI_R0_0 0x38000000 /* li %r0,0 */
184 #define B_DOT 0x48000000 /* b . */
185
186 /* After that, we need two instructions to load the index, followed by
187 a branch. */
188 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
189 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
190
191 /* Instructions used by the save and restore reg functions. */
192 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
193 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
194 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
195 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
196 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
197 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
198 #define LI_R12_0 0x39800000 /* li %r12,0 */
199 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
200 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
201 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
202 #define BLR 0x4e800020 /* blr */
203
204 /* Since .opd is an array of descriptors and each entry will end up
205 with identical R_PPC64_RELATIVE relocs, there is really no need to
206 propagate .opd relocs; The dynamic linker should be taught to
207 relocate .opd without reloc entries. */
208 #ifndef NO_OPD_RELOCS
209 #define NO_OPD_RELOCS 0
210 #endif
211 \f
212 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
213
214 /* Relocation HOWTO's. */
215 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
216
217 static reloc_howto_type ppc64_elf_howto_raw[] = {
218 /* This reloc does nothing. */
219 HOWTO (R_PPC64_NONE, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_NONE", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 32 bit relocation. */
234 HOWTO (R_PPC64_ADDR32, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 32, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC64_ADDR32", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffffffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* An absolute 26 bit branch; the lower two bits must be zero.
249 FIXME: we don't check that, we just clear them. */
250 HOWTO (R_PPC64_ADDR24, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 26, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR24", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0x03fffffc, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A standard 16 bit relocation. */
265 HOWTO (R_PPC64_ADDR16, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_bitfield, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* A 16 bit relocation without overflow. */
280 HOWTO (R_PPC64_ADDR16_LO, /* type */
281 0, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont,/* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_LO", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address. */
295 HOWTO (R_PPC64_ADDR16_HI, /* type */
296 16, /* rightshift */
297 1, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_dont, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR16_HI", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xffff, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
310 bits, treated as a signed number, is negative. */
311 HOWTO (R_PPC64_ADDR16_HA, /* type */
312 16, /* rightshift */
313 1, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_dont, /* complain_on_overflow */
318 ppc64_elf_ha_reloc, /* special_function */
319 "R_PPC64_ADDR16_HA", /* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0xffff, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch; the lower two bits must be zero.
326 FIXME: we don't check that, we just clear them. */
327 HOWTO (R_PPC64_ADDR14, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 16, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield, /* complain_on_overflow */
334 ppc64_elf_branch_reloc, /* special_function */
335 "R_PPC64_ADDR14", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0x0000fffc, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* An absolute 16 bit branch, for which bit 10 should be set to
342 indicate that the branch is expected to be taken. The lower two
343 bits must be zero. */
344 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 ppc64_elf_brtaken_reloc, /* special_function */
352 "R_PPC64_ADDR14_BRTAKEN",/* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x0000fffc, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 /* An absolute 16 bit branch, for which bit 10 should be set to
359 indicate that the branch is not expected to be taken. The lower
360 two bits must be zero. */
361 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 ppc64_elf_brtaken_reloc, /* special_function */
369 "R_PPC64_ADDR14_BRNTAKEN",/* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* A relative 26 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL24, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 26, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL24", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x03fffffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch; the lower two bits must be zero. */
391 HOWTO (R_PPC64_REL14, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 16, /* bitsize */
395 TRUE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_signed, /* complain_on_overflow */
398 ppc64_elf_branch_reloc, /* special_function */
399 "R_PPC64_REL14", /* name */
400 FALSE, /* partial_inplace */
401 0, /* src_mask */
402 0x0000fffc, /* dst_mask */
403 TRUE), /* pcrel_offset */
404
405 /* A relative 16 bit branch. Bit 10 should be set to indicate that
406 the branch is expected to be taken. The lower two bits must be
407 zero. */
408 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_brtaken_reloc, /* special_function */
416 "R_PPC64_REL14_BRTAKEN", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0x0000fffc, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 /* A relative 16 bit branch. Bit 10 should be set to indicate that
423 the branch is not expected to be taken. The lower two bits must
424 be zero. */
425 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
426 0, /* rightshift */
427 2, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 TRUE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_signed, /* complain_on_overflow */
432 ppc64_elf_brtaken_reloc, /* special_function */
433 "R_PPC64_REL14_BRNTAKEN",/* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0x0000fffc, /* dst_mask */
437 TRUE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
440 symbol. */
441 HOWTO (R_PPC64_GOT16, /* type */
442 0, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_LO, /* type */
458 0, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_LO", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
472 the symbol. */
473 HOWTO (R_PPC64_GOT16_HI, /* type */
474 16, /* rightshift */
475 1, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_dont,/* complain_on_overflow */
480 ppc64_elf_unhandled_reloc, /* special_function */
481 "R_PPC64_GOT16_HI", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
488 the symbol. */
489 HOWTO (R_PPC64_GOT16_HA, /* type */
490 16, /* rightshift */
491 1, /* size (0 = byte, 1 = short, 2 = long) */
492 16, /* bitsize */
493 FALSE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_dont,/* complain_on_overflow */
496 ppc64_elf_unhandled_reloc, /* special_function */
497 "R_PPC64_GOT16_HA", /* name */
498 FALSE, /* partial_inplace */
499 0, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE), /* pcrel_offset */
502
503 /* This is used only by the dynamic linker. The symbol should exist
504 both in the object being run and in some shared library. The
505 dynamic linker copies the data addressed by the symbol from the
506 shared library into the object, because the object being
507 run has to have the data at some particular address. */
508 HOWTO (R_PPC64_COPY, /* type */
509 0, /* rightshift */
510 0, /* this one is variable size */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_COPY", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Like R_PPC64_ADDR64, but used when setting global offset table
523 entries. */
524 HOWTO (R_PPC64_GLOB_DAT, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc64_elf_unhandled_reloc, /* special_function */
532 "R_PPC64_GLOB_DAT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Created by the link editor. Marks a procedure linkage table
539 entry for a symbol. */
540 HOWTO (R_PPC64_JMP_SLOT, /* type */
541 0, /* rightshift */
542 0, /* size (0 = byte, 1 = short, 2 = long) */
543 0, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 ppc64_elf_unhandled_reloc, /* special_function */
548 "R_PPC64_JMP_SLOT", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Used only by the dynamic linker. When the object is run, this
555 doubleword64 is set to the load address of the object, plus the
556 addend. */
557 HOWTO (R_PPC64_RELATIVE, /* type */
558 0, /* rightshift */
559 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
560 64, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_RELATIVE", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 ONES (64), /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC64_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC64_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC64_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative. */
602 HOWTO (R_PPC64_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 /* FIXME: Verify. Was complain_overflow_bitfield. */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC64_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table. */
618 HOWTO (R_PPC64_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: R_PPC64_PLTREL32 not supported. */
634 HOWTO (R_PPC64_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC64_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffffffff, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC64_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc64_elf_unhandled_reloc, /* special_function */
674 "R_PPC64_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC64_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_unhandled_reloc, /* special_function */
690 "R_PPC64_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* Like R_PPC64_SECTOFF, but no overflow warning. */
712 HOWTO (R_PPC64_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC64_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 ppc64_elf_sectoff_ha_reloc, /* special_function */
750 "R_PPC64_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Like R_PPC64_REL24 without touching the two least significant bits. */
757 HOWTO (R_PPC64_REL30, /* type */
758 2, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 30, /* bitsize */
761 TRUE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_REL30", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xfffffffc, /* dst_mask */
769 TRUE), /* pcrel_offset */
770
771 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
772
773 /* A standard 64-bit relocation. */
774 HOWTO (R_PPC64_ADDR64, /* type */
775 0, /* rightshift */
776 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
777 64, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR64", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 ONES (64), /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address. */
789 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
790 32, /* rightshift */
791 1, /* size (0 = byte, 1 = short, 2 = long) */
792 16, /* bitsize */
793 FALSE, /* pc_relative */
794 0, /* bitpos */
795 complain_overflow_dont, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 "R_PPC64_ADDR16_HIGHER", /* name */
798 FALSE, /* partial_inplace */
799 0, /* src_mask */
800 0xffff, /* dst_mask */
801 FALSE), /* pcrel_offset */
802
803 /* The bits 32-47 of an address, plus 1 if the contents of the low
804 16 bits, treated as a signed number, is negative. */
805 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
806 32, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 ppc64_elf_ha_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHERA", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address. */
820 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
821 48, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_PPC64_ADDR16_HIGHEST", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* The bits 48-63 of an address, plus 1 if the contents of the low
835 16 bits, treated as a signed number, is negative. */
836 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
837 48, /* rightshift */
838 1, /* size (0 = byte, 1 = short, 2 = long) */
839 16, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 ppc64_elf_ha_reloc, /* special_function */
844 "R_PPC64_ADDR16_HIGHESTA", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0xffff, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Like ADDR64, but may be unaligned. */
851 HOWTO (R_PPC64_UADDR64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_UADDR64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit relative relocation. */
866 HOWTO (R_PPC64_REL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_PPC64_REL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 64-bit relocation to the symbol's procedure linkage table. */
881 HOWTO (R_PPC64_PLT64, /* type */
882 0, /* rightshift */
883 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
884 64, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_dont, /* complain_on_overflow */
888 ppc64_elf_unhandled_reloc, /* special_function */
889 "R_PPC64_PLT64", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 ONES (64), /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* 64-bit PC relative relocation to the symbol's procedure linkage
896 table. */
897 /* FIXME: R_PPC64_PLTREL64 not supported. */
898 HOWTO (R_PPC64_PLTREL64, /* type */
899 0, /* rightshift */
900 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
901 64, /* bitsize */
902 TRUE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc64_elf_unhandled_reloc, /* special_function */
906 "R_PPC64_PLTREL64", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 ONES (64), /* dst_mask */
910 TRUE), /* pcrel_offset */
911
912 /* 16 bit TOC-relative relocation. */
913
914 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
915 HOWTO (R_PPC64_TOC16, /* type */
916 0, /* rightshift */
917 1, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_signed, /* complain_on_overflow */
922 ppc64_elf_toc_reloc, /* special_function */
923 "R_PPC64_TOC16", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 0xffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
928
929 /* 16 bit TOC-relative relocation without overflow. */
930
931 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
932 HOWTO (R_PPC64_TOC16_LO, /* type */
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc64_elf_toc_reloc, /* special_function */
940 "R_PPC64_TOC16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* 16 bit TOC-relative relocation, high 16 bits. */
947
948 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
949 HOWTO (R_PPC64_TOC16_HI, /* type */
950 16, /* rightshift */
951 1, /* size (0 = byte, 1 = short, 2 = long) */
952 16, /* bitsize */
953 FALSE, /* pc_relative */
954 0, /* bitpos */
955 complain_overflow_dont, /* complain_on_overflow */
956 ppc64_elf_toc_reloc, /* special_function */
957 "R_PPC64_TOC16_HI", /* name */
958 FALSE, /* partial_inplace */
959 0, /* src_mask */
960 0xffff, /* dst_mask */
961 FALSE), /* pcrel_offset */
962
963 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
964 contents of the low 16 bits, treated as a signed number, is
965 negative. */
966
967 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
968 HOWTO (R_PPC64_TOC16_HA, /* type */
969 16, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc64_elf_toc_ha_reloc, /* special_function */
976 "R_PPC64_TOC16_HA", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 64-bit relocation; insert value of TOC base (.TOC.). */
983
984 /* R_PPC64_TOC 51 doubleword64 .TOC. */
985 HOWTO (R_PPC64_TOC, /* type */
986 0, /* rightshift */
987 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
988 64, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_bitfield, /* complain_on_overflow */
992 ppc64_elf_toc64_reloc, /* special_function */
993 "R_PPC64_TOC", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 ONES (64), /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like R_PPC64_GOT16, but also informs the link editor that the
1000 value to relocate may (!) refer to a PLT entry which the link
1001 editor (a) may replace with the symbol value. If the link editor
1002 is unable to fully resolve the symbol, it may (b) create a PLT
1003 entry and store the address to the new PLT entry in the GOT.
1004 This permits lazy resolution of function symbols at run time.
1005 The link editor may also skip all of this and just (c) emit a
1006 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1007 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16, /* type */
1009 0, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_signed, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLTGOT16, but without overflow. */
1023 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1024 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1025 0, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_unhandled_reloc, /* special_function */
1032 "R_PPC64_PLTGOT16_LO", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1039 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1040 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1041 16, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont, /* complain_on_overflow */
1047 ppc64_elf_unhandled_reloc, /* special_function */
1048 "R_PPC64_PLTGOT16_HI", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xffff, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1055 1 if the contents of the low 16 bits, treated as a signed number,
1056 is negative. */
1057 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1058 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1059 16, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 ppc64_elf_unhandled_reloc, /* special_function */
1066 "R_PPC64_PLTGOT16_HA", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_bitfield, /* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont,/* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 "R_PPC64_ADDR16_LO_DS",/* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_GOT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_unhandled_reloc, /* special_function */
1141 "R_PPC64_PLT16_LO_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_bitfield, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_sectoff_reloc, /* special_function */
1171 "R_PPC64_SECTOFF_LO_DS",/* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_signed, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1193 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_toc_reloc, /* special_function */
1201 "R_PPC64_TOC16_LO_DS", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1208 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1209 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1210 0, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_signed, /* complain_on_overflow */
1216 ppc64_elf_unhandled_reloc, /* special_function */
1217 "R_PPC64_PLTGOT16_DS", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xfffc, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1224 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1225 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1226 0, /* rightshift */
1227 1, /* size (0 = byte, 1 = short, 2 = long) */
1228 16, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 ppc64_elf_unhandled_reloc, /* special_function */
1233 "R_PPC64_PLTGOT16_LO_DS",/* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0xfffc, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Marker relocs for TLS. */
1240 HOWTO (R_PPC64_TLS,
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_PPC64_TLS", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 0, /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 HOWTO (R_PPC64_TLSGD,
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_PPC64_TLSGD", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 0, /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 HOWTO (R_PPC64_TLSLD,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLSLD", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* Computes the load module index of the load module that contains the
1283 definition of its TLS sym. */
1284 HOWTO (R_PPC64_DTPMOD64,
1285 0, /* rightshift */
1286 4, /* size (0 = byte, 1 = short, 2 = long) */
1287 64, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_dont, /* complain_on_overflow */
1291 ppc64_elf_unhandled_reloc, /* special_function */
1292 "R_PPC64_DTPMOD64", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 ONES (64), /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* Computes a dtv-relative displacement, the difference between the value
1299 of sym+add and the base address of the thread-local storage block that
1300 contains the definition of sym, minus 0x8000. */
1301 HOWTO (R_PPC64_DTPREL64,
1302 0, /* rightshift */
1303 4, /* size (0 = byte, 1 = short, 2 = long) */
1304 64, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL64", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 ONES (64), /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* A 16 bit dtprel reloc. */
1316 HOWTO (R_PPC64_DTPREL16,
1317 0, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16, but no overflow. */
1331 HOWTO (R_PPC64_DTPREL16_LO,
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_LO", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HI,
1347 16, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HI", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HA,
1362 16, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHER,
1377 32, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHER", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1392 32, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHERA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1406 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1407 48, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_HIGHEST", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xffff, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1421 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1422 48, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like DTPREL16, but for insns with a DS field. */
1436 HOWTO (R_PPC64_DTPREL16_DS,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_DTPREL16_DS", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xfffc, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like DTPREL16_DS, but no overflow. */
1451 HOWTO (R_PPC64_DTPREL16_LO_DS,
1452 0, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_DTPREL16_LO_DS", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xfffc, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Computes a tp-relative displacement, the difference between the value of
1466 sym+add and the value of the thread pointer (r13). */
1467 HOWTO (R_PPC64_TPREL64,
1468 0, /* rightshift */
1469 4, /* size (0 = byte, 1 = short, 2 = long) */
1470 64, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL64", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 ONES (64), /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* A 16 bit tprel reloc. */
1482 HOWTO (R_PPC64_TPREL16,
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16, but no overflow. */
1497 HOWTO (R_PPC64_TPREL16_LO,
1498 0, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_LO", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_LO, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HI,
1513 16, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HI", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HI, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HA,
1528 16, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HI, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHER,
1543 32, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHER", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHERA,
1558 32, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHERA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1572 HOWTO (R_PPC64_TPREL16_HIGHEST,
1573 48, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_dont, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_HIGHEST", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xffff, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1587 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1588 48, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_HIGHESTA", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xffff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Like TPREL16, but for insns with a DS field. */
1602 HOWTO (R_PPC64_TPREL16_DS,
1603 0, /* rightshift */
1604 1, /* size (0 = byte, 1 = short, 2 = long) */
1605 16, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_signed, /* complain_on_overflow */
1609 ppc64_elf_unhandled_reloc, /* special_function */
1610 "R_PPC64_TPREL16_DS", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0xfffc, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Like TPREL16_DS, but no overflow. */
1617 HOWTO (R_PPC64_TPREL16_LO_DS,
1618 0, /* rightshift */
1619 1, /* size (0 = byte, 1 = short, 2 = long) */
1620 16, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_dont, /* complain_on_overflow */
1624 ppc64_elf_unhandled_reloc, /* special_function */
1625 "R_PPC64_TPREL16_LO_DS", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0xfffc, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1632 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1633 to the first entry relative to the TOC base (r2). */
1634 HOWTO (R_PPC64_GOT_TLSGD16,
1635 0, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_signed, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16, but no overflow. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1650 0, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_LO", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1664 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1665 16, /* rightshift */
1666 1, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc64_elf_unhandled_reloc, /* special_function */
1672 "R_PPC64_GOT_TLSGD16_HI", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0xffff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1679 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1680 16, /* rightshift */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc64_elf_unhandled_reloc, /* special_function */
1687 "R_PPC64_GOT_TLSGD16_HA", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0xffff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1694 with values (sym+add)@dtpmod and zero, and computes the offset to the
1695 first entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_TLSLD16,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16, but no overflow. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_LO", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_TLSLD16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_TLSLD16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1756 the offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_DTPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_DTPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1817 offset to the entry relative to the TOC base (r2). */
1818 HOWTO (R_PPC64_GOT_TPREL16_DS,
1819 0, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_signed, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_DS", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xfffc, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_DS, but no overflow. */
1833 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1834 0, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xfffc, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1848 HOWTO (R_PPC64_GOT_TPREL16_HI,
1849 16, /* rightshift */
1850 1, /* size (0 = byte, 1 = short, 2 = long) */
1851 16, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 ppc64_elf_unhandled_reloc, /* special_function */
1856 "R_PPC64_GOT_TPREL16_HI", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0xffff, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1863 HOWTO (R_PPC64_GOT_TPREL16_HA,
1864 16, /* rightshift */
1865 1, /* size (0 = byte, 1 = short, 2 = long) */
1866 16, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 ppc64_elf_unhandled_reloc, /* special_function */
1871 "R_PPC64_GOT_TPREL16_HA", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0xffff, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876
1877 HOWTO (R_PPC64_JMP_IREL, /* type */
1878 0, /* rightshift */
1879 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1880 0, /* bitsize */
1881 FALSE, /* pc_relative */
1882 0, /* bitpos */
1883 complain_overflow_dont, /* complain_on_overflow */
1884 ppc64_elf_unhandled_reloc, /* special_function */
1885 "R_PPC64_JMP_IREL", /* name */
1886 FALSE, /* partial_inplace */
1887 0, /* src_mask */
1888 0, /* dst_mask */
1889 FALSE), /* pcrel_offset */
1890
1891 HOWTO (R_PPC64_IRELATIVE, /* type */
1892 0, /* rightshift */
1893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1894 64, /* bitsize */
1895 FALSE, /* pc_relative */
1896 0, /* bitpos */
1897 complain_overflow_dont, /* complain_on_overflow */
1898 bfd_elf_generic_reloc, /* special_function */
1899 "R_PPC64_IRELATIVE", /* name */
1900 FALSE, /* partial_inplace */
1901 0, /* src_mask */
1902 ONES (64), /* dst_mask */
1903 FALSE), /* pcrel_offset */
1904
1905 /* A 16 bit relative relocation. */
1906 HOWTO (R_PPC64_REL16, /* type */
1907 0, /* rightshift */
1908 1, /* size (0 = byte, 1 = short, 2 = long) */
1909 16, /* bitsize */
1910 TRUE, /* pc_relative */
1911 0, /* bitpos */
1912 complain_overflow_bitfield, /* complain_on_overflow */
1913 bfd_elf_generic_reloc, /* special_function */
1914 "R_PPC64_REL16", /* name */
1915 FALSE, /* partial_inplace */
1916 0, /* src_mask */
1917 0xffff, /* dst_mask */
1918 TRUE), /* pcrel_offset */
1919
1920 /* A 16 bit relative relocation without overflow. */
1921 HOWTO (R_PPC64_REL16_LO, /* type */
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 TRUE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_dont,/* complain_on_overflow */
1928 bfd_elf_generic_reloc, /* special_function */
1929 "R_PPC64_REL16_LO", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xffff, /* dst_mask */
1933 TRUE), /* pcrel_offset */
1934
1935 /* The high order 16 bits of a relative address. */
1936 HOWTO (R_PPC64_REL16_HI, /* type */
1937 16, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 TRUE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 bfd_elf_generic_reloc, /* special_function */
1944 "R_PPC64_REL16_HI", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xffff, /* dst_mask */
1948 TRUE), /* pcrel_offset */
1949
1950 /* The high order 16 bits of a relative address, plus 1 if the contents of
1951 the low 16 bits, treated as a signed number, is negative. */
1952 HOWTO (R_PPC64_REL16_HA, /* type */
1953 16, /* rightshift */
1954 1, /* size (0 = byte, 1 = short, 2 = long) */
1955 16, /* bitsize */
1956 TRUE, /* pc_relative */
1957 0, /* bitpos */
1958 complain_overflow_dont, /* complain_on_overflow */
1959 ppc64_elf_ha_reloc, /* special_function */
1960 "R_PPC64_REL16_HA", /* name */
1961 FALSE, /* partial_inplace */
1962 0, /* src_mask */
1963 0xffff, /* dst_mask */
1964 TRUE), /* pcrel_offset */
1965
1966 /* GNU extension to record C++ vtable hierarchy. */
1967 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1968 0, /* rightshift */
1969 0, /* size (0 = byte, 1 = short, 2 = long) */
1970 0, /* bitsize */
1971 FALSE, /* pc_relative */
1972 0, /* bitpos */
1973 complain_overflow_dont, /* complain_on_overflow */
1974 NULL, /* special_function */
1975 "R_PPC64_GNU_VTINHERIT", /* name */
1976 FALSE, /* partial_inplace */
1977 0, /* src_mask */
1978 0, /* dst_mask */
1979 FALSE), /* pcrel_offset */
1980
1981 /* GNU extension to record C++ vtable member usage. */
1982 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1983 0, /* rightshift */
1984 0, /* size (0 = byte, 1 = short, 2 = long) */
1985 0, /* bitsize */
1986 FALSE, /* pc_relative */
1987 0, /* bitpos */
1988 complain_overflow_dont, /* complain_on_overflow */
1989 NULL, /* special_function */
1990 "R_PPC64_GNU_VTENTRY", /* name */
1991 FALSE, /* partial_inplace */
1992 0, /* src_mask */
1993 0, /* dst_mask */
1994 FALSE), /* pcrel_offset */
1995 };
1996
1997 \f
1998 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1999 be done. */
2000
2001 static void
2002 ppc_howto_init (void)
2003 {
2004 unsigned int i, type;
2005
2006 for (i = 0;
2007 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2008 i++)
2009 {
2010 type = ppc64_elf_howto_raw[i].type;
2011 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2012 / sizeof (ppc64_elf_howto_table[0])));
2013 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2014 }
2015 }
2016
2017 static reloc_howto_type *
2018 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2019 bfd_reloc_code_real_type code)
2020 {
2021 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2022
2023 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2024 /* Initialize howto table if needed. */
2025 ppc_howto_init ();
2026
2027 switch (code)
2028 {
2029 default:
2030 return NULL;
2031
2032 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2033 break;
2034 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2035 break;
2036 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2037 break;
2038 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2039 break;
2040 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2041 break;
2042 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2043 break;
2044 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2045 break;
2046 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2047 break;
2048 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2053 break;
2054 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2055 break;
2056 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2059 break;
2060 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2061 break;
2062 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2063 break;
2064 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2065 break;
2066 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2067 break;
2068 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2069 break;
2070 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2071 break;
2072 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2073 break;
2074 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2075 break;
2076 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2077 break;
2078 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2079 break;
2080 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2081 break;
2082 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2083 break;
2084 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2085 break;
2086 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2087 break;
2088 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2089 break;
2090 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2091 break;
2092 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2093 break;
2094 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2103 break;
2104 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2105 break;
2106 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2107 break;
2108 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2109 break;
2110 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2111 break;
2112 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2117 break;
2118 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2119 break;
2120 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2127 break;
2128 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2131 break;
2132 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2135 break;
2136 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2141 break;
2142 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2145 break;
2146 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2149 break;
2150 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2151 break;
2152 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2153 break;
2154 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2155 break;
2156 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2157 break;
2158 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2165 break;
2166 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2167 break;
2168 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2177 break;
2178 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2201 break;
2202 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2209 break;
2210 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2221 break;
2222 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2233 break;
2234 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2235 break;
2236 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2237 break;
2238 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2239 break;
2240 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2241 break;
2242 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2243 break;
2244 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2245 break;
2246 }
2247
2248 return ppc64_elf_howto_table[r];
2249 };
2250
2251 static reloc_howto_type *
2252 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2253 const char *r_name)
2254 {
2255 unsigned int i;
2256
2257 for (i = 0;
2258 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2259 i++)
2260 if (ppc64_elf_howto_raw[i].name != NULL
2261 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2262 return &ppc64_elf_howto_raw[i];
2263
2264 return NULL;
2265 }
2266
2267 /* Set the howto pointer for a PowerPC ELF reloc. */
2268
2269 static void
2270 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2271 Elf_Internal_Rela *dst)
2272 {
2273 unsigned int type;
2274
2275 /* Initialize howto table if needed. */
2276 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2277 ppc_howto_init ();
2278
2279 type = ELF64_R_TYPE (dst->r_info);
2280 if (type >= (sizeof (ppc64_elf_howto_table)
2281 / sizeof (ppc64_elf_howto_table[0])))
2282 {
2283 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2284 abfd, (int) type);
2285 type = R_PPC64_NONE;
2286 }
2287 cache_ptr->howto = ppc64_elf_howto_table[type];
2288 }
2289
2290 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 /* If this is a relocatable link (output_bfd test tells us), just
2298 call the generic function. Any adjustment will be done at final
2299 link time. */
2300 if (output_bfd != NULL)
2301 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2302 input_section, output_bfd, error_message);
2303
2304 /* Adjust the addend for sign extension of the low 16 bits.
2305 We won't actually be using the low 16 bits, so trashing them
2306 doesn't matter. */
2307 reloc_entry->addend += 0x8000;
2308 return bfd_reloc_continue;
2309 }
2310
2311 static bfd_reloc_status_type
2312 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2313 void *data, asection *input_section,
2314 bfd *output_bfd, char **error_message)
2315 {
2316 if (output_bfd != NULL)
2317 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2318 input_section, output_bfd, error_message);
2319
2320 if (strcmp (symbol->section->name, ".opd") == 0
2321 && (symbol->section->owner->flags & DYNAMIC) == 0)
2322 {
2323 bfd_vma dest = opd_entry_value (symbol->section,
2324 symbol->value + reloc_entry->addend,
2325 NULL, NULL);
2326 if (dest != (bfd_vma) -1)
2327 reloc_entry->addend = dest - (symbol->value
2328 + symbol->section->output_section->vma
2329 + symbol->section->output_offset);
2330 }
2331 return bfd_reloc_continue;
2332 }
2333
2334 static bfd_reloc_status_type
2335 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2336 void *data, asection *input_section,
2337 bfd *output_bfd, char **error_message)
2338 {
2339 long insn;
2340 enum elf_ppc64_reloc_type r_type;
2341 bfd_size_type octets;
2342 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2343 bfd_boolean is_power4 = FALSE;
2344
2345 /* If this is a relocatable link (output_bfd test tells us), just
2346 call the generic function. Any adjustment will be done at final
2347 link time. */
2348 if (output_bfd != NULL)
2349 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2350 input_section, output_bfd, error_message);
2351
2352 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2353 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2354 insn &= ~(0x01 << 21);
2355 r_type = reloc_entry->howto->type;
2356 if (r_type == R_PPC64_ADDR14_BRTAKEN
2357 || r_type == R_PPC64_REL14_BRTAKEN)
2358 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2359
2360 if (is_power4)
2361 {
2362 /* Set 'a' bit. This is 0b00010 in BO field for branch
2363 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2364 for branch on CTR insns (BO == 1a00t or 1a01t). */
2365 if ((insn & (0x14 << 21)) == (0x04 << 21))
2366 insn |= 0x02 << 21;
2367 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2368 insn |= 0x08 << 21;
2369 else
2370 goto out;
2371 }
2372 else
2373 {
2374 bfd_vma target = 0;
2375 bfd_vma from;
2376
2377 if (!bfd_is_com_section (symbol->section))
2378 target = symbol->value;
2379 target += symbol->section->output_section->vma;
2380 target += symbol->section->output_offset;
2381 target += reloc_entry->addend;
2382
2383 from = (reloc_entry->address
2384 + input_section->output_offset
2385 + input_section->output_section->vma);
2386
2387 /* Invert 'y' bit if not the default. */
2388 if ((bfd_signed_vma) (target - from) < 0)
2389 insn ^= 0x01 << 21;
2390 }
2391 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2392 out:
2393 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2394 input_section, output_bfd, error_message);
2395 }
2396
2397 static bfd_reloc_status_type
2398 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2399 void *data, asection *input_section,
2400 bfd *output_bfd, char **error_message)
2401 {
2402 /* If this is a relocatable link (output_bfd test tells us), just
2403 call the generic function. Any adjustment will be done at final
2404 link time. */
2405 if (output_bfd != NULL)
2406 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2407 input_section, output_bfd, error_message);
2408
2409 /* Subtract the symbol section base address. */
2410 reloc_entry->addend -= symbol->section->output_section->vma;
2411 return bfd_reloc_continue;
2412 }
2413
2414 static bfd_reloc_status_type
2415 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2416 void *data, asection *input_section,
2417 bfd *output_bfd, char **error_message)
2418 {
2419 /* If this is a relocatable link (output_bfd test tells us), just
2420 call the generic function. Any adjustment will be done at final
2421 link time. */
2422 if (output_bfd != NULL)
2423 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2424 input_section, output_bfd, error_message);
2425
2426 /* Subtract the symbol section base address. */
2427 reloc_entry->addend -= symbol->section->output_section->vma;
2428
2429 /* Adjust the addend for sign extension of the low 16 bits. */
2430 reloc_entry->addend += 0x8000;
2431 return bfd_reloc_continue;
2432 }
2433
2434 static bfd_reloc_status_type
2435 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2436 void *data, asection *input_section,
2437 bfd *output_bfd, char **error_message)
2438 {
2439 bfd_vma TOCstart;
2440
2441 /* If this is a relocatable link (output_bfd test tells us), just
2442 call the generic function. Any adjustment will be done at final
2443 link time. */
2444 if (output_bfd != NULL)
2445 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2446 input_section, output_bfd, error_message);
2447
2448 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2449 if (TOCstart == 0)
2450 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2451
2452 /* Subtract the TOC base address. */
2453 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2454 return bfd_reloc_continue;
2455 }
2456
2457 static bfd_reloc_status_type
2458 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2459 void *data, asection *input_section,
2460 bfd *output_bfd, char **error_message)
2461 {
2462 bfd_vma TOCstart;
2463
2464 /* If this is a relocatable link (output_bfd test tells us), just
2465 call the generic function. Any adjustment will be done at final
2466 link time. */
2467 if (output_bfd != NULL)
2468 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2469 input_section, output_bfd, error_message);
2470
2471 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2472 if (TOCstart == 0)
2473 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2474
2475 /* Subtract the TOC base address. */
2476 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2477
2478 /* Adjust the addend for sign extension of the low 16 bits. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 bfd_vma TOCstart;
2489 bfd_size_type octets;
2490
2491 /* If this is a relocatable link (output_bfd test tells us), just
2492 call the generic function. Any adjustment will be done at final
2493 link time. */
2494 if (output_bfd != NULL)
2495 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2496 input_section, output_bfd, error_message);
2497
2498 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2499 if (TOCstart == 0)
2500 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2501
2502 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2503 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2504 return bfd_reloc_ok;
2505 }
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 if (error_message != NULL)
2520 {
2521 static char buf[60];
2522 sprintf (buf, "generic linker can't handle %s",
2523 reloc_entry->howto->name);
2524 *error_message = buf;
2525 }
2526 return bfd_reloc_dangerous;
2527 }
2528
2529 /* Track GOT entries needed for a given symbol. We might need more
2530 than one got entry per symbol. */
2531 struct got_entry
2532 {
2533 struct got_entry *next;
2534
2535 /* The symbol addend that we'll be placing in the GOT. */
2536 bfd_vma addend;
2537
2538 /* Unlike other ELF targets, we use separate GOT entries for the same
2539 symbol referenced from different input files. This is to support
2540 automatic multiple TOC/GOT sections, where the TOC base can vary
2541 from one input file to another. After partitioning into TOC groups
2542 we merge entries within the group.
2543
2544 Point to the BFD owning this GOT entry. */
2545 bfd *owner;
2546
2547 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2548 TLS_TPREL or TLS_DTPREL for tls entries. */
2549 unsigned char tls_type;
2550
2551 /* Non-zero if got.ent points to real entry. */
2552 unsigned char is_indirect;
2553
2554 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2555 union
2556 {
2557 bfd_signed_vma refcount;
2558 bfd_vma offset;
2559 struct got_entry *ent;
2560 } got;
2561 };
2562
2563 /* The same for PLT. */
2564 struct plt_entry
2565 {
2566 struct plt_entry *next;
2567
2568 bfd_vma addend;
2569
2570 union
2571 {
2572 bfd_signed_vma refcount;
2573 bfd_vma offset;
2574 } plt;
2575 };
2576
2577 struct ppc64_elf_obj_tdata
2578 {
2579 struct elf_obj_tdata elf;
2580
2581 /* Shortcuts to dynamic linker sections. */
2582 asection *got;
2583 asection *relgot;
2584
2585 /* Used during garbage collection. We attach global symbols defined
2586 on removed .opd entries to this section so that the sym is removed. */
2587 asection *deleted_section;
2588
2589 /* TLS local dynamic got entry handling. Support for multiple GOT
2590 sections means we potentially need one of these for each input bfd. */
2591 struct got_entry tlsld_got;
2592
2593 /* A copy of relocs before they are modified for --emit-relocs. */
2594 Elf_Internal_Rela *opd_relocs;
2595
2596 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2597 the reloc to be in the range -32768 to 32767. */
2598 unsigned int has_small_toc_reloc;
2599 };
2600
2601 #define ppc64_elf_tdata(bfd) \
2602 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2603
2604 #define ppc64_tlsld_got(bfd) \
2605 (&ppc64_elf_tdata (bfd)->tlsld_got)
2606
2607 #define is_ppc64_elf(bfd) \
2608 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2609 && elf_object_id (bfd) == PPC64_ELF_DATA)
2610
2611 /* Override the generic function because we store some extras. */
2612
2613 static bfd_boolean
2614 ppc64_elf_mkobject (bfd *abfd)
2615 {
2616 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2617 PPC64_ELF_DATA);
2618 }
2619
2620 /* Fix bad default arch selected for a 64 bit input bfd when the
2621 default is 32 bit. */
2622
2623 static bfd_boolean
2624 ppc64_elf_object_p (bfd *abfd)
2625 {
2626 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2627 {
2628 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2629
2630 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2631 {
2632 /* Relies on arch after 32 bit default being 64 bit default. */
2633 abfd->arch_info = abfd->arch_info->next;
2634 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2635 }
2636 }
2637 return TRUE;
2638 }
2639
2640 /* Support for core dump NOTE sections. */
2641
2642 static bfd_boolean
2643 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2644 {
2645 size_t offset, size;
2646
2647 if (note->descsz != 504)
2648 return FALSE;
2649
2650 /* pr_cursig */
2651 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2652
2653 /* pr_pid */
2654 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2655
2656 /* pr_reg */
2657 offset = 112;
2658 size = 384;
2659
2660 /* Make a ".reg/999" section. */
2661 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2662 size, note->descpos + offset);
2663 }
2664
2665 static bfd_boolean
2666 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2667 {
2668 if (note->descsz != 136)
2669 return FALSE;
2670
2671 elf_tdata (abfd)->core_program
2672 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2673 elf_tdata (abfd)->core_command
2674 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2675
2676 return TRUE;
2677 }
2678
2679 static char *
2680 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2681 ...)
2682 {
2683 switch (note_type)
2684 {
2685 default:
2686 return NULL;
2687
2688 case NT_PRPSINFO:
2689 {
2690 char data[136];
2691 va_list ap;
2692
2693 va_start (ap, note_type);
2694 memset (data, 0, 40);
2695 strncpy (data + 40, va_arg (ap, const char *), 16);
2696 strncpy (data + 56, va_arg (ap, const char *), 80);
2697 va_end (ap);
2698 return elfcore_write_note (abfd, buf, bufsiz,
2699 "CORE", note_type, data, sizeof (data));
2700 }
2701
2702 case NT_PRSTATUS:
2703 {
2704 char data[504];
2705 va_list ap;
2706 long pid;
2707 int cursig;
2708 const void *greg;
2709
2710 va_start (ap, note_type);
2711 memset (data, 0, 112);
2712 pid = va_arg (ap, long);
2713 bfd_put_32 (abfd, pid, data + 32);
2714 cursig = va_arg (ap, int);
2715 bfd_put_16 (abfd, cursig, data + 12);
2716 greg = va_arg (ap, const void *);
2717 memcpy (data + 112, greg, 384);
2718 memset (data + 496, 0, 8);
2719 va_end (ap);
2720 return elfcore_write_note (abfd, buf, bufsiz,
2721 "CORE", note_type, data, sizeof (data));
2722 }
2723 }
2724 }
2725
2726 /* Merge backend specific data from an object file to the output
2727 object file when linking. */
2728
2729 static bfd_boolean
2730 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2731 {
2732 /* Check if we have the same endianess. */
2733 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2734 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2735 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2736 {
2737 const char *msg;
2738
2739 if (bfd_big_endian (ibfd))
2740 msg = _("%B: compiled for a big endian system "
2741 "and target is little endian");
2742 else
2743 msg = _("%B: compiled for a little endian system "
2744 "and target is big endian");
2745
2746 (*_bfd_error_handler) (msg, ibfd);
2747
2748 bfd_set_error (bfd_error_wrong_format);
2749 return FALSE;
2750 }
2751
2752 return TRUE;
2753 }
2754
2755 /* Add extra PPC sections. */
2756
2757 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2758 {
2759 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2760 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2761 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2762 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2765 { NULL, 0, 0, 0, 0 }
2766 };
2767
2768 enum _ppc64_sec_type {
2769 sec_normal = 0,
2770 sec_opd = 1,
2771 sec_toc = 2
2772 };
2773
2774 struct _ppc64_elf_section_data
2775 {
2776 struct bfd_elf_section_data elf;
2777
2778 union
2779 {
2780 /* An array with one entry for each opd function descriptor. */
2781 struct _opd_sec_data
2782 {
2783 /* Points to the function code section for local opd entries. */
2784 asection **func_sec;
2785
2786 /* After editing .opd, adjust references to opd local syms. */
2787 long *adjust;
2788 } opd;
2789
2790 /* An array for toc sections, indexed by offset/8. */
2791 struct _toc_sec_data
2792 {
2793 /* Specifies the relocation symbol index used at a given toc offset. */
2794 unsigned *symndx;
2795
2796 /* And the relocation addend. */
2797 bfd_vma *add;
2798 } toc;
2799 } u;
2800
2801 enum _ppc64_sec_type sec_type:2;
2802
2803 /* Flag set when small branches are detected. Used to
2804 select suitable defaults for the stub group size. */
2805 unsigned int has_14bit_branch:1;
2806 };
2807
2808 #define ppc64_elf_section_data(sec) \
2809 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2810
2811 static bfd_boolean
2812 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2813 {
2814 if (!sec->used_by_bfd)
2815 {
2816 struct _ppc64_elf_section_data *sdata;
2817 bfd_size_type amt = sizeof (*sdata);
2818
2819 sdata = bfd_zalloc (abfd, amt);
2820 if (sdata == NULL)
2821 return FALSE;
2822 sec->used_by_bfd = sdata;
2823 }
2824
2825 return _bfd_elf_new_section_hook (abfd, sec);
2826 }
2827
2828 static struct _opd_sec_data *
2829 get_opd_info (asection * sec)
2830 {
2831 if (sec != NULL
2832 && ppc64_elf_section_data (sec) != NULL
2833 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2834 return &ppc64_elf_section_data (sec)->u.opd;
2835 return NULL;
2836 }
2837 \f
2838 /* Parameters for the qsort hook. */
2839 static bfd_boolean synthetic_relocatable;
2840
2841 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2842
2843 static int
2844 compare_symbols (const void *ap, const void *bp)
2845 {
2846 const asymbol *a = * (const asymbol **) ap;
2847 const asymbol *b = * (const asymbol **) bp;
2848
2849 /* Section symbols first. */
2850 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2851 return -1;
2852 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2853 return 1;
2854
2855 /* then .opd symbols. */
2856 if (strcmp (a->section->name, ".opd") == 0
2857 && strcmp (b->section->name, ".opd") != 0)
2858 return -1;
2859 if (strcmp (a->section->name, ".opd") != 0
2860 && strcmp (b->section->name, ".opd") == 0)
2861 return 1;
2862
2863 /* then other code symbols. */
2864 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2865 == (SEC_CODE | SEC_ALLOC)
2866 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 != (SEC_CODE | SEC_ALLOC))
2868 return -1;
2869
2870 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2871 != (SEC_CODE | SEC_ALLOC)
2872 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 == (SEC_CODE | SEC_ALLOC))
2874 return 1;
2875
2876 if (synthetic_relocatable)
2877 {
2878 if (a->section->id < b->section->id)
2879 return -1;
2880
2881 if (a->section->id > b->section->id)
2882 return 1;
2883 }
2884
2885 if (a->value + a->section->vma < b->value + b->section->vma)
2886 return -1;
2887
2888 if (a->value + a->section->vma > b->value + b->section->vma)
2889 return 1;
2890
2891 /* For syms with the same value, prefer strong dynamic global function
2892 syms over other syms. */
2893 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2894 return -1;
2895
2896 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2897 return 1;
2898
2899 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2900 return -1;
2901
2902 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2903 return 1;
2904
2905 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2906 return -1;
2907
2908 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2909 return 1;
2910
2911 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2912 return -1;
2913
2914 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2915 return 1;
2916
2917 return 0;
2918 }
2919
2920 /* Search SYMS for a symbol of the given VALUE. */
2921
2922 static asymbol *
2923 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2924 {
2925 long mid;
2926
2927 if (id == -1)
2928 {
2929 while (lo < hi)
2930 {
2931 mid = (lo + hi) >> 1;
2932 if (syms[mid]->value + syms[mid]->section->vma < value)
2933 lo = mid + 1;
2934 else if (syms[mid]->value + syms[mid]->section->vma > value)
2935 hi = mid;
2936 else
2937 return syms[mid];
2938 }
2939 }
2940 else
2941 {
2942 while (lo < hi)
2943 {
2944 mid = (lo + hi) >> 1;
2945 if (syms[mid]->section->id < id)
2946 lo = mid + 1;
2947 else if (syms[mid]->section->id > id)
2948 hi = mid;
2949 else if (syms[mid]->value < value)
2950 lo = mid + 1;
2951 else if (syms[mid]->value > value)
2952 hi = mid;
2953 else
2954 return syms[mid];
2955 }
2956 }
2957 return NULL;
2958 }
2959
2960 static bfd_boolean
2961 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2962 {
2963 bfd_vma vma = *(bfd_vma *) ptr;
2964 return ((section->flags & SEC_ALLOC) != 0
2965 && section->vma <= vma
2966 && vma < section->vma + section->size);
2967 }
2968
2969 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2970 entry syms. Also generate @plt symbols for the glink branch table. */
2971
2972 static long
2973 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2974 long static_count, asymbol **static_syms,
2975 long dyn_count, asymbol **dyn_syms,
2976 asymbol **ret)
2977 {
2978 asymbol *s;
2979 long i;
2980 long count;
2981 char *names;
2982 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2983 asection *opd;
2984 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2985 asymbol **syms;
2986
2987 *ret = NULL;
2988
2989 opd = bfd_get_section_by_name (abfd, ".opd");
2990 if (opd == NULL)
2991 return 0;
2992
2993 symcount = static_count;
2994 if (!relocatable)
2995 symcount += dyn_count;
2996 if (symcount == 0)
2997 return 0;
2998
2999 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3000 if (syms == NULL)
3001 return -1;
3002
3003 if (!relocatable && static_count != 0 && dyn_count != 0)
3004 {
3005 /* Use both symbol tables. */
3006 memcpy (syms, static_syms, static_count * sizeof (*syms));
3007 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3008 }
3009 else if (!relocatable && static_count == 0)
3010 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3011 else
3012 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3013
3014 synthetic_relocatable = relocatable;
3015 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3016
3017 if (!relocatable && symcount > 1)
3018 {
3019 long j;
3020 /* Trim duplicate syms, since we may have merged the normal and
3021 dynamic symbols. Actually, we only care about syms that have
3022 different values, so trim any with the same value. */
3023 for (i = 1, j = 1; i < symcount; ++i)
3024 if (syms[i - 1]->value + syms[i - 1]->section->vma
3025 != syms[i]->value + syms[i]->section->vma)
3026 syms[j++] = syms[i];
3027 symcount = j;
3028 }
3029
3030 i = 0;
3031 if (strcmp (syms[i]->section->name, ".opd") == 0)
3032 ++i;
3033 codesecsym = i;
3034
3035 for (; i < symcount; ++i)
3036 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3037 != (SEC_CODE | SEC_ALLOC))
3038 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3039 break;
3040 codesecsymend = i;
3041
3042 for (; i < symcount; ++i)
3043 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3044 break;
3045 secsymend = i;
3046
3047 for (; i < symcount; ++i)
3048 if (strcmp (syms[i]->section->name, ".opd") != 0)
3049 break;
3050 opdsymend = i;
3051
3052 for (; i < symcount; ++i)
3053 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3054 != (SEC_CODE | SEC_ALLOC))
3055 break;
3056 symcount = i;
3057
3058 count = 0;
3059
3060 if (relocatable)
3061 {
3062 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3063 arelent *r;
3064 size_t size;
3065 long relcount;
3066
3067 if (opdsymend == secsymend)
3068 goto done;
3069
3070 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3071 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3072 if (relcount == 0)
3073 goto done;
3074
3075 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3076 {
3077 count = -1;
3078 goto done;
3079 }
3080
3081 size = 0;
3082 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3083 {
3084 asymbol *sym;
3085
3086 while (r < opd->relocation + relcount
3087 && r->address < syms[i]->value + opd->vma)
3088 ++r;
3089
3090 if (r == opd->relocation + relcount)
3091 break;
3092
3093 if (r->address != syms[i]->value + opd->vma)
3094 continue;
3095
3096 if (r->howto->type != R_PPC64_ADDR64)
3097 continue;
3098
3099 sym = *r->sym_ptr_ptr;
3100 if (!sym_exists_at (syms, opdsymend, symcount,
3101 sym->section->id, sym->value + r->addend))
3102 {
3103 ++count;
3104 size += sizeof (asymbol);
3105 size += strlen (syms[i]->name) + 2;
3106 }
3107 }
3108
3109 s = *ret = bfd_malloc (size);
3110 if (s == NULL)
3111 {
3112 count = -1;
3113 goto done;
3114 }
3115
3116 names = (char *) (s + count);
3117
3118 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3119 {
3120 asymbol *sym;
3121
3122 while (r < opd->relocation + relcount
3123 && r->address < syms[i]->value + opd->vma)
3124 ++r;
3125
3126 if (r == opd->relocation + relcount)
3127 break;
3128
3129 if (r->address != syms[i]->value + opd->vma)
3130 continue;
3131
3132 if (r->howto->type != R_PPC64_ADDR64)
3133 continue;
3134
3135 sym = *r->sym_ptr_ptr;
3136 if (!sym_exists_at (syms, opdsymend, symcount,
3137 sym->section->id, sym->value + r->addend))
3138 {
3139 size_t len;
3140
3141 *s = *syms[i];
3142 s->flags |= BSF_SYNTHETIC;
3143 s->section = sym->section;
3144 s->value = sym->value + r->addend;
3145 s->name = names;
3146 *names++ = '.';
3147 len = strlen (syms[i]->name);
3148 memcpy (names, syms[i]->name, len + 1);
3149 names += len + 1;
3150 /* Have udata.p point back to the original symbol this
3151 synthetic symbol was derived from. */
3152 s->udata.p = syms[i];
3153 s++;
3154 }
3155 }
3156 }
3157 else
3158 {
3159 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3160 bfd_byte *contents;
3161 size_t size;
3162 long plt_count = 0;
3163 bfd_vma glink_vma = 0, resolv_vma = 0;
3164 asection *dynamic, *glink = NULL, *relplt = NULL;
3165 arelent *p;
3166
3167 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3168 {
3169 if (contents)
3170 {
3171 free_contents_and_exit:
3172 free (contents);
3173 }
3174 count = -1;
3175 goto done;
3176 }
3177
3178 size = 0;
3179 for (i = secsymend; i < opdsymend; ++i)
3180 {
3181 bfd_vma ent;
3182
3183 /* Ignore bogus symbols. */
3184 if (syms[i]->value > opd->size - 8)
3185 continue;
3186
3187 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3188 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3189 {
3190 ++count;
3191 size += sizeof (asymbol);
3192 size += strlen (syms[i]->name) + 2;
3193 }
3194 }
3195
3196 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3197 if (dyn_count != 0
3198 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3199 {
3200 bfd_byte *dynbuf, *extdyn, *extdynend;
3201 size_t extdynsize;
3202 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3203
3204 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3205 goto free_contents_and_exit;
3206
3207 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3208 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3209
3210 extdyn = dynbuf;
3211 extdynend = extdyn + dynamic->size;
3212 for (; extdyn < extdynend; extdyn += extdynsize)
3213 {
3214 Elf_Internal_Dyn dyn;
3215 (*swap_dyn_in) (abfd, extdyn, &dyn);
3216
3217 if (dyn.d_tag == DT_NULL)
3218 break;
3219
3220 if (dyn.d_tag == DT_PPC64_GLINK)
3221 {
3222 /* The first glink stub starts at offset 32; see comment in
3223 ppc64_elf_finish_dynamic_sections. */
3224 glink_vma = dyn.d_un.d_val + 32;
3225 /* The .glink section usually does not survive the final
3226 link; search for the section (usually .text) where the
3227 glink stubs now reside. */
3228 glink = bfd_sections_find_if (abfd, section_covers_vma,
3229 &glink_vma);
3230 break;
3231 }
3232 }
3233
3234 free (dynbuf);
3235 }
3236
3237 if (glink != NULL)
3238 {
3239 /* Determine __glink trampoline by reading the relative branch
3240 from the first glink stub. */
3241 bfd_byte buf[4];
3242 if (bfd_get_section_contents (abfd, glink, buf,
3243 glink_vma + 4 - glink->vma, 4))
3244 {
3245 unsigned int insn = bfd_get_32 (abfd, buf);
3246 insn ^= B_DOT;
3247 if ((insn & ~0x3fffffc) == 0)
3248 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3249 }
3250
3251 if (resolv_vma)
3252 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3253
3254 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3255 if (relplt != NULL)
3256 {
3257 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3258 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3259 goto free_contents_and_exit;
3260
3261 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3262 size += plt_count * sizeof (asymbol);
3263
3264 p = relplt->relocation;
3265 for (i = 0; i < plt_count; i++, p++)
3266 {
3267 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3268 if (p->addend != 0)
3269 size += sizeof ("+0x") - 1 + 16;
3270 }
3271 }
3272 }
3273
3274 s = *ret = bfd_malloc (size);
3275 if (s == NULL)
3276 goto free_contents_and_exit;
3277
3278 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3279
3280 for (i = secsymend; i < opdsymend; ++i)
3281 {
3282 bfd_vma ent;
3283
3284 if (syms[i]->value > opd->size - 8)
3285 continue;
3286
3287 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3288 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3289 {
3290 long lo, hi;
3291 size_t len;
3292 asection *sec = abfd->sections;
3293
3294 *s = *syms[i];
3295 lo = codesecsym;
3296 hi = codesecsymend;
3297 while (lo < hi)
3298 {
3299 long mid = (lo + hi) >> 1;
3300 if (syms[mid]->section->vma < ent)
3301 lo = mid + 1;
3302 else if (syms[mid]->section->vma > ent)
3303 hi = mid;
3304 else
3305 {
3306 sec = syms[mid]->section;
3307 break;
3308 }
3309 }
3310
3311 if (lo >= hi && lo > codesecsym)
3312 sec = syms[lo - 1]->section;
3313
3314 for (; sec != NULL; sec = sec->next)
3315 {
3316 if (sec->vma > ent)
3317 break;
3318 if ((sec->flags & SEC_ALLOC) == 0
3319 || (sec->flags & SEC_LOAD) == 0)
3320 break;
3321 if ((sec->flags & SEC_CODE) != 0)
3322 s->section = sec;
3323 }
3324 s->flags |= BSF_SYNTHETIC;
3325 s->value = ent - s->section->vma;
3326 s->name = names;
3327 *names++ = '.';
3328 len = strlen (syms[i]->name);
3329 memcpy (names, syms[i]->name, len + 1);
3330 names += len + 1;
3331 /* Have udata.p point back to the original symbol this
3332 synthetic symbol was derived from. */
3333 s->udata.p = syms[i];
3334 s++;
3335 }
3336 }
3337 free (contents);
3338
3339 if (glink != NULL && relplt != NULL)
3340 {
3341 if (resolv_vma)
3342 {
3343 /* Add a symbol for the main glink trampoline. */
3344 memset (s, 0, sizeof *s);
3345 s->the_bfd = abfd;
3346 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3347 s->section = glink;
3348 s->value = resolv_vma - glink->vma;
3349 s->name = names;
3350 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3351 names += sizeof ("__glink_PLTresolve");
3352 s++;
3353 count++;
3354 }
3355
3356 /* FIXME: It would be very much nicer to put sym@plt on the
3357 stub rather than on the glink branch table entry. The
3358 objdump disassembler would then use a sensible symbol
3359 name on plt calls. The difficulty in doing so is
3360 a) finding the stubs, and,
3361 b) matching stubs against plt entries, and,
3362 c) there can be multiple stubs for a given plt entry.
3363
3364 Solving (a) could be done by code scanning, but older
3365 ppc64 binaries used different stubs to current code.
3366 (b) is the tricky one since you need to known the toc
3367 pointer for at least one function that uses a pic stub to
3368 be able to calculate the plt address referenced.
3369 (c) means gdb would need to set multiple breakpoints (or
3370 find the glink branch itself) when setting breakpoints
3371 for pending shared library loads. */
3372 p = relplt->relocation;
3373 for (i = 0; i < plt_count; i++, p++)
3374 {
3375 size_t len;
3376
3377 *s = **p->sym_ptr_ptr;
3378 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3379 we are defining a symbol, ensure one of them is set. */
3380 if ((s->flags & BSF_LOCAL) == 0)
3381 s->flags |= BSF_GLOBAL;
3382 s->flags |= BSF_SYNTHETIC;
3383 s->section = glink;
3384 s->value = glink_vma - glink->vma;
3385 s->name = names;
3386 s->udata.p = NULL;
3387 len = strlen ((*p->sym_ptr_ptr)->name);
3388 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3389 names += len;
3390 if (p->addend != 0)
3391 {
3392 memcpy (names, "+0x", sizeof ("+0x") - 1);
3393 names += sizeof ("+0x") - 1;
3394 bfd_sprintf_vma (abfd, names, p->addend);
3395 names += strlen (names);
3396 }
3397 memcpy (names, "@plt", sizeof ("@plt"));
3398 names += sizeof ("@plt");
3399 s++;
3400 glink_vma += 8;
3401 if (i >= 0x8000)
3402 glink_vma += 4;
3403 }
3404 count += plt_count;
3405 }
3406 }
3407
3408 done:
3409 free (syms);
3410 return count;
3411 }
3412 \f
3413 /* The following functions are specific to the ELF linker, while
3414 functions above are used generally. Those named ppc64_elf_* are
3415 called by the main ELF linker code. They appear in this file more
3416 or less in the order in which they are called. eg.
3417 ppc64_elf_check_relocs is called early in the link process,
3418 ppc64_elf_finish_dynamic_sections is one of the last functions
3419 called.
3420
3421 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3422 functions have both a function code symbol and a function descriptor
3423 symbol. A call to foo in a relocatable object file looks like:
3424
3425 . .text
3426 . x:
3427 . bl .foo
3428 . nop
3429
3430 The function definition in another object file might be:
3431
3432 . .section .opd
3433 . foo: .quad .foo
3434 . .quad .TOC.@tocbase
3435 . .quad 0
3436 .
3437 . .text
3438 . .foo: blr
3439
3440 When the linker resolves the call during a static link, the branch
3441 unsurprisingly just goes to .foo and the .opd information is unused.
3442 If the function definition is in a shared library, things are a little
3443 different: The call goes via a plt call stub, the opd information gets
3444 copied to the plt, and the linker patches the nop.
3445
3446 . x:
3447 . bl .foo_stub
3448 . ld 2,40(1)
3449 .
3450 .
3451 . .foo_stub:
3452 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3453 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3454 . std 2,40(1) # this is the general idea
3455 . ld 11,0(12)
3456 . ld 2,8(12)
3457 . mtctr 11
3458 . ld 11,16(12)
3459 . bctr
3460 .
3461 . .section .plt
3462 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3463
3464 The "reloc ()" notation is supposed to indicate that the linker emits
3465 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3466 copying.
3467
3468 What are the difficulties here? Well, firstly, the relocations
3469 examined by the linker in check_relocs are against the function code
3470 sym .foo, while the dynamic relocation in the plt is emitted against
3471 the function descriptor symbol, foo. Somewhere along the line, we need
3472 to carefully copy dynamic link information from one symbol to the other.
3473 Secondly, the generic part of the elf linker will make .foo a dynamic
3474 symbol as is normal for most other backends. We need foo dynamic
3475 instead, at least for an application final link. However, when
3476 creating a shared library containing foo, we need to have both symbols
3477 dynamic so that references to .foo are satisfied during the early
3478 stages of linking. Otherwise the linker might decide to pull in a
3479 definition from some other object, eg. a static library.
3480
3481 Update: As of August 2004, we support a new convention. Function
3482 calls may use the function descriptor symbol, ie. "bl foo". This
3483 behaves exactly as "bl .foo". */
3484
3485 /* The linker needs to keep track of the number of relocs that it
3486 decides to copy as dynamic relocs in check_relocs for each symbol.
3487 This is so that it can later discard them if they are found to be
3488 unnecessary. We store the information in a field extending the
3489 regular ELF linker hash table. */
3490
3491 struct ppc_dyn_relocs
3492 {
3493 struct ppc_dyn_relocs *next;
3494
3495 /* The input section of the reloc. */
3496 asection *sec;
3497
3498 /* Total number of relocs copied for the input section. */
3499 bfd_size_type count;
3500
3501 /* Number of pc-relative relocs copied for the input section. */
3502 bfd_size_type pc_count;
3503 };
3504
3505 /* Of those relocs that might be copied as dynamic relocs, this function
3506 selects those that must be copied when linking a shared library,
3507 even when the symbol is local. */
3508
3509 static int
3510 must_be_dyn_reloc (struct bfd_link_info *info,
3511 enum elf_ppc64_reloc_type r_type)
3512 {
3513 switch (r_type)
3514 {
3515 default:
3516 return 1;
3517
3518 case R_PPC64_REL32:
3519 case R_PPC64_REL64:
3520 case R_PPC64_REL30:
3521 return 0;
3522
3523 case R_PPC64_TPREL16:
3524 case R_PPC64_TPREL16_LO:
3525 case R_PPC64_TPREL16_HI:
3526 case R_PPC64_TPREL16_HA:
3527 case R_PPC64_TPREL16_DS:
3528 case R_PPC64_TPREL16_LO_DS:
3529 case R_PPC64_TPREL16_HIGHER:
3530 case R_PPC64_TPREL16_HIGHERA:
3531 case R_PPC64_TPREL16_HIGHEST:
3532 case R_PPC64_TPREL16_HIGHESTA:
3533 case R_PPC64_TPREL64:
3534 return !info->executable;
3535 }
3536 }
3537
3538 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3539 copying dynamic variables from a shared lib into an app's dynbss
3540 section, and instead use a dynamic relocation to point into the
3541 shared lib. With code that gcc generates, it's vital that this be
3542 enabled; In the PowerPC64 ABI, the address of a function is actually
3543 the address of a function descriptor, which resides in the .opd
3544 section. gcc uses the descriptor directly rather than going via the
3545 GOT as some other ABI's do, which means that initialized function
3546 pointers must reference the descriptor. Thus, a function pointer
3547 initialized to the address of a function in a shared library will
3548 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3549 redefines the function descriptor symbol to point to the copy. This
3550 presents a problem as a plt entry for that function is also
3551 initialized from the function descriptor symbol and the copy reloc
3552 may not be initialized first. */
3553 #define ELIMINATE_COPY_RELOCS 1
3554
3555 /* Section name for stubs is the associated section name plus this
3556 string. */
3557 #define STUB_SUFFIX ".stub"
3558
3559 /* Linker stubs.
3560 ppc_stub_long_branch:
3561 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3562 destination, but a 24 bit branch in a stub section will reach.
3563 . b dest
3564
3565 ppc_stub_plt_branch:
3566 Similar to the above, but a 24 bit branch in the stub section won't
3567 reach its destination.
3568 . addis %r12,%r2,xxx@toc@ha
3569 . ld %r11,xxx@toc@l(%r12)
3570 . mtctr %r11
3571 . bctr
3572
3573 ppc_stub_plt_call:
3574 Used to call a function in a shared library. If it so happens that
3575 the plt entry referenced crosses a 64k boundary, then an extra
3576 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3577 . addis %r12,%r2,xxx@toc@ha
3578 . std %r2,40(%r1)
3579 . ld %r11,xxx+0@toc@l(%r12)
3580 . mtctr %r11
3581 . ld %r2,xxx+8@toc@l(%r12)
3582 . ld %r11,xxx+16@toc@l(%r12)
3583 . bctr
3584
3585 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3586 code to adjust the value and save r2 to support multiple toc sections.
3587 A ppc_stub_long_branch with an r2 offset looks like:
3588 . std %r2,40(%r1)
3589 . addis %r2,%r2,off@ha
3590 . addi %r2,%r2,off@l
3591 . b dest
3592
3593 A ppc_stub_plt_branch with an r2 offset looks like:
3594 . std %r2,40(%r1)
3595 . addis %r12,%r2,xxx@toc@ha
3596 . ld %r11,xxx@toc@l(%r12)
3597 . addis %r2,%r2,off@ha
3598 . addi %r2,%r2,off@l
3599 . mtctr %r11
3600 . bctr
3601
3602 In cases where the "addis" instruction would add zero, the "addis" is
3603 omitted and following instructions modified slightly in some cases.
3604 */
3605
3606 enum ppc_stub_type {
3607 ppc_stub_none,
3608 ppc_stub_long_branch,
3609 ppc_stub_long_branch_r2off,
3610 ppc_stub_plt_branch,
3611 ppc_stub_plt_branch_r2off,
3612 ppc_stub_plt_call
3613 };
3614
3615 struct ppc_stub_hash_entry {
3616
3617 /* Base hash table entry structure. */
3618 struct bfd_hash_entry root;
3619
3620 enum ppc_stub_type stub_type;
3621
3622 /* The stub section. */
3623 asection *stub_sec;
3624
3625 /* Offset within stub_sec of the beginning of this stub. */
3626 bfd_vma stub_offset;
3627
3628 /* Given the symbol's value and its section we can determine its final
3629 value when building the stubs (so the stub knows where to jump. */
3630 bfd_vma target_value;
3631 asection *target_section;
3632
3633 /* The symbol table entry, if any, that this was derived from. */
3634 struct ppc_link_hash_entry *h;
3635 struct plt_entry *plt_ent;
3636
3637 /* And the reloc addend that this was derived from. */
3638 bfd_vma addend;
3639
3640 /* Where this stub is being called from, or, in the case of combined
3641 stub sections, the first input section in the group. */
3642 asection *id_sec;
3643 };
3644
3645 struct ppc_branch_hash_entry {
3646
3647 /* Base hash table entry structure. */
3648 struct bfd_hash_entry root;
3649
3650 /* Offset within branch lookup table. */
3651 unsigned int offset;
3652
3653 /* Generation marker. */
3654 unsigned int iter;
3655 };
3656
3657 struct ppc_link_hash_entry
3658 {
3659 struct elf_link_hash_entry elf;
3660
3661 union {
3662 /* A pointer to the most recently used stub hash entry against this
3663 symbol. */
3664 struct ppc_stub_hash_entry *stub_cache;
3665
3666 /* A pointer to the next symbol starting with a '.' */
3667 struct ppc_link_hash_entry *next_dot_sym;
3668 } u;
3669
3670 /* Track dynamic relocs copied for this symbol. */
3671 struct ppc_dyn_relocs *dyn_relocs;
3672
3673 /* Link between function code and descriptor symbols. */
3674 struct ppc_link_hash_entry *oh;
3675
3676 /* Flag function code and descriptor symbols. */
3677 unsigned int is_func:1;
3678 unsigned int is_func_descriptor:1;
3679 unsigned int fake:1;
3680
3681 /* Whether global opd/toc sym has been adjusted or not.
3682 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3683 should be set for all globals defined in any opd/toc section. */
3684 unsigned int adjust_done:1;
3685
3686 /* Set if we twiddled this symbol to weak at some stage. */
3687 unsigned int was_undefined:1;
3688
3689 /* Contexts in which symbol is used in the GOT (or TOC).
3690 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3691 corresponding relocs are encountered during check_relocs.
3692 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3693 indicate the corresponding GOT entry type is not needed.
3694 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3695 a TPREL one. We use a separate flag rather than setting TPREL
3696 just for convenience in distinguishing the two cases. */
3697 #define TLS_GD 1 /* GD reloc. */
3698 #define TLS_LD 2 /* LD reloc. */
3699 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3700 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3701 #define TLS_TLS 16 /* Any TLS reloc. */
3702 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3703 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3704 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3705 unsigned char tls_mask;
3706 };
3707
3708 /* ppc64 ELF linker hash table. */
3709
3710 struct ppc_link_hash_table
3711 {
3712 struct elf_link_hash_table elf;
3713
3714 /* The stub hash table. */
3715 struct bfd_hash_table stub_hash_table;
3716
3717 /* Another hash table for plt_branch stubs. */
3718 struct bfd_hash_table branch_hash_table;
3719
3720 /* Linker stub bfd. */
3721 bfd *stub_bfd;
3722
3723 /* Linker call-backs. */
3724 asection * (*add_stub_section) (const char *, asection *);
3725 void (*layout_sections_again) (void);
3726
3727 /* Array to keep track of which stub sections have been created, and
3728 information on stub grouping. */
3729 struct map_stub {
3730 /* This is the section to which stubs in the group will be attached. */
3731 asection *link_sec;
3732 /* The stub section. */
3733 asection *stub_sec;
3734 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3735 bfd_vma toc_off;
3736 } *stub_group;
3737
3738 /* Temp used when calculating TOC pointers. */
3739 bfd_vma toc_curr;
3740 bfd *toc_bfd;
3741 asection *toc_first_sec;
3742
3743 /* Highest input section id. */
3744 int top_id;
3745
3746 /* Highest output section index. */
3747 int top_index;
3748
3749 /* Used when adding symbols. */
3750 struct ppc_link_hash_entry *dot_syms;
3751
3752 /* List of input sections for each output section. */
3753 asection **input_list;
3754
3755 /* Short-cuts to get to dynamic linker sections. */
3756 asection *got;
3757 asection *plt;
3758 asection *relplt;
3759 asection *iplt;
3760 asection *reliplt;
3761 asection *dynbss;
3762 asection *relbss;
3763 asection *glink;
3764 asection *sfpr;
3765 asection *brlt;
3766 asection *relbrlt;
3767
3768 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3769 struct ppc_link_hash_entry *tls_get_addr;
3770 struct ppc_link_hash_entry *tls_get_addr_fd;
3771
3772 /* The size of reliplt used by got entry relocs. */
3773 bfd_size_type got_reli_size;
3774
3775 /* Statistics. */
3776 unsigned long stub_count[ppc_stub_plt_call];
3777
3778 /* Number of stubs against global syms. */
3779 unsigned long stub_globals;
3780
3781 /* Set if we should emit symbols for stubs. */
3782 unsigned int emit_stub_syms:1;
3783
3784 /* Set if __tls_get_addr optimization should not be done. */
3785 unsigned int no_tls_get_addr_opt:1;
3786
3787 /* Support for multiple toc sections. */
3788 unsigned int do_multi_toc:1;
3789 unsigned int multi_toc_needed:1;
3790 unsigned int second_toc_pass:1;
3791 unsigned int do_toc_opt:1;
3792
3793 /* Set on error. */
3794 unsigned int stub_error:1;
3795
3796 /* Temp used by ppc64_elf_process_dot_syms. */
3797 unsigned int twiddled_syms:1;
3798
3799 /* Incremented every time we size stubs. */
3800 unsigned int stub_iteration;
3801
3802 /* Small local sym cache. */
3803 struct sym_cache sym_cache;
3804 };
3805
3806 /* Rename some of the generic section flags to better document how they
3807 are used here. */
3808
3809 /* Nonzero if this section has TLS related relocations. */
3810 #define has_tls_reloc sec_flg0
3811
3812 /* Nonzero if this section has a call to __tls_get_addr. */
3813 #define has_tls_get_addr_call sec_flg1
3814
3815 /* Nonzero if this section has any toc or got relocs. */
3816 #define has_toc_reloc sec_flg2
3817
3818 /* Nonzero if this section has a call to another section that uses
3819 the toc or got. */
3820 #define makes_toc_func_call sec_flg3
3821
3822 /* Recursion protection when determining above flag. */
3823 #define call_check_in_progress sec_flg4
3824 #define call_check_done sec_flg5
3825
3826 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3827
3828 #define ppc_hash_table(p) \
3829 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3830 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3831
3832 #define ppc_stub_hash_lookup(table, string, create, copy) \
3833 ((struct ppc_stub_hash_entry *) \
3834 bfd_hash_lookup ((table), (string), (create), (copy)))
3835
3836 #define ppc_branch_hash_lookup(table, string, create, copy) \
3837 ((struct ppc_branch_hash_entry *) \
3838 bfd_hash_lookup ((table), (string), (create), (copy)))
3839
3840 /* Create an entry in the stub hash table. */
3841
3842 static struct bfd_hash_entry *
3843 stub_hash_newfunc (struct bfd_hash_entry *entry,
3844 struct bfd_hash_table *table,
3845 const char *string)
3846 {
3847 /* Allocate the structure if it has not already been allocated by a
3848 subclass. */
3849 if (entry == NULL)
3850 {
3851 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3852 if (entry == NULL)
3853 return entry;
3854 }
3855
3856 /* Call the allocation method of the superclass. */
3857 entry = bfd_hash_newfunc (entry, table, string);
3858 if (entry != NULL)
3859 {
3860 struct ppc_stub_hash_entry *eh;
3861
3862 /* Initialize the local fields. */
3863 eh = (struct ppc_stub_hash_entry *) entry;
3864 eh->stub_type = ppc_stub_none;
3865 eh->stub_sec = NULL;
3866 eh->stub_offset = 0;
3867 eh->target_value = 0;
3868 eh->target_section = NULL;
3869 eh->h = NULL;
3870 eh->id_sec = NULL;
3871 }
3872
3873 return entry;
3874 }
3875
3876 /* Create an entry in the branch hash table. */
3877
3878 static struct bfd_hash_entry *
3879 branch_hash_newfunc (struct bfd_hash_entry *entry,
3880 struct bfd_hash_table *table,
3881 const char *string)
3882 {
3883 /* Allocate the structure if it has not already been allocated by a
3884 subclass. */
3885 if (entry == NULL)
3886 {
3887 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3888 if (entry == NULL)
3889 return entry;
3890 }
3891
3892 /* Call the allocation method of the superclass. */
3893 entry = bfd_hash_newfunc (entry, table, string);
3894 if (entry != NULL)
3895 {
3896 struct ppc_branch_hash_entry *eh;
3897
3898 /* Initialize the local fields. */
3899 eh = (struct ppc_branch_hash_entry *) entry;
3900 eh->offset = 0;
3901 eh->iter = 0;
3902 }
3903
3904 return entry;
3905 }
3906
3907 /* Create an entry in a ppc64 ELF linker hash table. */
3908
3909 static struct bfd_hash_entry *
3910 link_hash_newfunc (struct bfd_hash_entry *entry,
3911 struct bfd_hash_table *table,
3912 const char *string)
3913 {
3914 /* Allocate the structure if it has not already been allocated by a
3915 subclass. */
3916 if (entry == NULL)
3917 {
3918 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3919 if (entry == NULL)
3920 return entry;
3921 }
3922
3923 /* Call the allocation method of the superclass. */
3924 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3925 if (entry != NULL)
3926 {
3927 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3928
3929 memset (&eh->u.stub_cache, 0,
3930 (sizeof (struct ppc_link_hash_entry)
3931 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3932
3933 /* When making function calls, old ABI code references function entry
3934 points (dot symbols), while new ABI code references the function
3935 descriptor symbol. We need to make any combination of reference and
3936 definition work together, without breaking archive linking.
3937
3938 For a defined function "foo" and an undefined call to "bar":
3939 An old object defines "foo" and ".foo", references ".bar" (possibly
3940 "bar" too).
3941 A new object defines "foo" and references "bar".
3942
3943 A new object thus has no problem with its undefined symbols being
3944 satisfied by definitions in an old object. On the other hand, the
3945 old object won't have ".bar" satisfied by a new object.
3946
3947 Keep a list of newly added dot-symbols. */
3948
3949 if (string[0] == '.')
3950 {
3951 struct ppc_link_hash_table *htab;
3952
3953 htab = (struct ppc_link_hash_table *) table;
3954 eh->u.next_dot_sym = htab->dot_syms;
3955 htab->dot_syms = eh;
3956 }
3957 }
3958
3959 return entry;
3960 }
3961
3962 /* Create a ppc64 ELF linker hash table. */
3963
3964 static struct bfd_link_hash_table *
3965 ppc64_elf_link_hash_table_create (bfd *abfd)
3966 {
3967 struct ppc_link_hash_table *htab;
3968 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3969
3970 htab = bfd_zmalloc (amt);
3971 if (htab == NULL)
3972 return NULL;
3973
3974 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3975 sizeof (struct ppc_link_hash_entry),
3976 PPC64_ELF_DATA))
3977 {
3978 free (htab);
3979 return NULL;
3980 }
3981
3982 /* Init the stub hash table too. */
3983 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3984 sizeof (struct ppc_stub_hash_entry)))
3985 return NULL;
3986
3987 /* And the branch hash table. */
3988 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3989 sizeof (struct ppc_branch_hash_entry)))
3990 return NULL;
3991
3992 /* Initializing two fields of the union is just cosmetic. We really
3993 only care about glist, but when compiled on a 32-bit host the
3994 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3995 debugger inspection of these fields look nicer. */
3996 htab->elf.init_got_refcount.refcount = 0;
3997 htab->elf.init_got_refcount.glist = NULL;
3998 htab->elf.init_plt_refcount.refcount = 0;
3999 htab->elf.init_plt_refcount.glist = NULL;
4000 htab->elf.init_got_offset.offset = 0;
4001 htab->elf.init_got_offset.glist = NULL;
4002 htab->elf.init_plt_offset.offset = 0;
4003 htab->elf.init_plt_offset.glist = NULL;
4004
4005 return &htab->elf.root;
4006 }
4007
4008 /* Free the derived linker hash table. */
4009
4010 static void
4011 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4012 {
4013 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4014
4015 bfd_hash_table_free (&ret->stub_hash_table);
4016 bfd_hash_table_free (&ret->branch_hash_table);
4017 _bfd_generic_link_hash_table_free (hash);
4018 }
4019
4020 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4021
4022 void
4023 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4024 {
4025 struct ppc_link_hash_table *htab;
4026
4027 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4028
4029 /* Always hook our dynamic sections into the first bfd, which is the
4030 linker created stub bfd. This ensures that the GOT header is at
4031 the start of the output TOC section. */
4032 htab = ppc_hash_table (info);
4033 if (htab == NULL)
4034 return;
4035 htab->stub_bfd = abfd;
4036 htab->elf.dynobj = abfd;
4037 }
4038
4039 /* Build a name for an entry in the stub hash table. */
4040
4041 static char *
4042 ppc_stub_name (const asection *input_section,
4043 const asection *sym_sec,
4044 const struct ppc_link_hash_entry *h,
4045 const Elf_Internal_Rela *rel)
4046 {
4047 char *stub_name;
4048 bfd_size_type len;
4049
4050 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4051 offsets from a sym as a branch target? In fact, we could
4052 probably assume the addend is always zero. */
4053 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4054
4055 if (h)
4056 {
4057 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4058 stub_name = bfd_malloc (len);
4059 if (stub_name == NULL)
4060 return stub_name;
4061
4062 sprintf (stub_name, "%08x.%s+%x",
4063 input_section->id & 0xffffffff,
4064 h->elf.root.root.string,
4065 (int) rel->r_addend & 0xffffffff);
4066 }
4067 else
4068 {
4069 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4070 stub_name = bfd_malloc (len);
4071 if (stub_name == NULL)
4072 return stub_name;
4073
4074 sprintf (stub_name, "%08x.%x:%x+%x",
4075 input_section->id & 0xffffffff,
4076 sym_sec->id & 0xffffffff,
4077 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4078 (int) rel->r_addend & 0xffffffff);
4079 }
4080 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4081 stub_name[len - 2] = 0;
4082 return stub_name;
4083 }
4084
4085 /* Look up an entry in the stub hash. Stub entries are cached because
4086 creating the stub name takes a bit of time. */
4087
4088 static struct ppc_stub_hash_entry *
4089 ppc_get_stub_entry (const asection *input_section,
4090 const asection *sym_sec,
4091 struct ppc_link_hash_entry *h,
4092 const Elf_Internal_Rela *rel,
4093 struct ppc_link_hash_table *htab)
4094 {
4095 struct ppc_stub_hash_entry *stub_entry;
4096 const asection *id_sec;
4097
4098 /* If this input section is part of a group of sections sharing one
4099 stub section, then use the id of the first section in the group.
4100 Stub names need to include a section id, as there may well be
4101 more than one stub used to reach say, printf, and we need to
4102 distinguish between them. */
4103 id_sec = htab->stub_group[input_section->id].link_sec;
4104
4105 if (h != NULL && h->u.stub_cache != NULL
4106 && h->u.stub_cache->h == h
4107 && h->u.stub_cache->id_sec == id_sec)
4108 {
4109 stub_entry = h->u.stub_cache;
4110 }
4111 else
4112 {
4113 char *stub_name;
4114
4115 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4116 if (stub_name == NULL)
4117 return NULL;
4118
4119 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4120 stub_name, FALSE, FALSE);
4121 if (h != NULL)
4122 h->u.stub_cache = stub_entry;
4123
4124 free (stub_name);
4125 }
4126
4127 return stub_entry;
4128 }
4129
4130 /* Add a new stub entry to the stub hash. Not all fields of the new
4131 stub entry are initialised. */
4132
4133 static struct ppc_stub_hash_entry *
4134 ppc_add_stub (const char *stub_name,
4135 asection *section,
4136 struct ppc_link_hash_table *htab)
4137 {
4138 asection *link_sec;
4139 asection *stub_sec;
4140 struct ppc_stub_hash_entry *stub_entry;
4141
4142 link_sec = htab->stub_group[section->id].link_sec;
4143 stub_sec = htab->stub_group[section->id].stub_sec;
4144 if (stub_sec == NULL)
4145 {
4146 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4147 if (stub_sec == NULL)
4148 {
4149 size_t namelen;
4150 bfd_size_type len;
4151 char *s_name;
4152
4153 namelen = strlen (link_sec->name);
4154 len = namelen + sizeof (STUB_SUFFIX);
4155 s_name = bfd_alloc (htab->stub_bfd, len);
4156 if (s_name == NULL)
4157 return NULL;
4158
4159 memcpy (s_name, link_sec->name, namelen);
4160 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4161 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4162 if (stub_sec == NULL)
4163 return NULL;
4164 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4165 }
4166 htab->stub_group[section->id].stub_sec = stub_sec;
4167 }
4168
4169 /* Enter this entry into the linker stub hash table. */
4170 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4171 TRUE, FALSE);
4172 if (stub_entry == NULL)
4173 {
4174 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4175 section->owner, stub_name);
4176 return NULL;
4177 }
4178
4179 stub_entry->stub_sec = stub_sec;
4180 stub_entry->stub_offset = 0;
4181 stub_entry->id_sec = link_sec;
4182 return stub_entry;
4183 }
4184
4185 /* Create sections for linker generated code. */
4186
4187 static bfd_boolean
4188 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4189 {
4190 struct ppc_link_hash_table *htab;
4191 flagword flags;
4192
4193 htab = ppc_hash_table (info);
4194 if (htab == NULL)
4195 return FALSE;
4196
4197 /* Create .sfpr for code to save and restore fp regs. */
4198 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4199 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4200 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4201 flags);
4202 if (htab->sfpr == NULL
4203 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4204 return FALSE;
4205
4206 /* Create .glink for lazy dynamic linking support. */
4207 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4208 flags);
4209 if (htab->glink == NULL
4210 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4211 return FALSE;
4212
4213 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4214 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4215 if (htab->iplt == NULL
4216 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4217 return FALSE;
4218
4219 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4220 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4221 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4222 ".rela.iplt",
4223 flags);
4224 if (htab->reliplt == NULL
4225 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4226 return FALSE;
4227
4228 /* Create branch lookup table for plt_branch stubs. */
4229 flags = (SEC_ALLOC | SEC_LOAD
4230 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4231 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4232 flags);
4233 if (htab->brlt == NULL
4234 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4235 return FALSE;
4236
4237 if (!info->shared)
4238 return TRUE;
4239
4240 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4241 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4242 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4243 ".rela.branch_lt",
4244 flags);
4245 if (htab->relbrlt == NULL
4246 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4247 return FALSE;
4248
4249 return TRUE;
4250 }
4251
4252 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4253 not already done. */
4254
4255 static bfd_boolean
4256 create_got_section (bfd *abfd, struct bfd_link_info *info)
4257 {
4258 asection *got, *relgot;
4259 flagword flags;
4260 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4261
4262 if (!is_ppc64_elf (abfd))
4263 return FALSE;
4264 if (htab == NULL)
4265 return FALSE;
4266
4267 if (!htab->got)
4268 {
4269 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4270 return FALSE;
4271
4272 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4273 if (!htab->got)
4274 abort ();
4275 }
4276
4277 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4278 | SEC_LINKER_CREATED);
4279
4280 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4281 if (!got
4282 || !bfd_set_section_alignment (abfd, got, 3))
4283 return FALSE;
4284
4285 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4286 flags | SEC_READONLY);
4287 if (!relgot
4288 || ! bfd_set_section_alignment (abfd, relgot, 3))
4289 return FALSE;
4290
4291 ppc64_elf_tdata (abfd)->got = got;
4292 ppc64_elf_tdata (abfd)->relgot = relgot;
4293 return TRUE;
4294 }
4295
4296 /* Create the dynamic sections, and set up shortcuts. */
4297
4298 static bfd_boolean
4299 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4300 {
4301 struct ppc_link_hash_table *htab;
4302
4303 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4304 return FALSE;
4305
4306 htab = ppc_hash_table (info);
4307 if (htab == NULL)
4308 return FALSE;
4309
4310 if (!htab->got)
4311 htab->got = bfd_get_section_by_name (dynobj, ".got");
4312 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4313 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4314 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4315 if (!info->shared)
4316 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4317
4318 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4319 || (!info->shared && !htab->relbss))
4320 abort ();
4321
4322 return TRUE;
4323 }
4324
4325 /* Follow indirect and warning symbol links. */
4326
4327 static inline struct bfd_link_hash_entry *
4328 follow_link (struct bfd_link_hash_entry *h)
4329 {
4330 while (h->type == bfd_link_hash_indirect
4331 || h->type == bfd_link_hash_warning)
4332 h = h->u.i.link;
4333 return h;
4334 }
4335
4336 static inline struct elf_link_hash_entry *
4337 elf_follow_link (struct elf_link_hash_entry *h)
4338 {
4339 return (struct elf_link_hash_entry *) follow_link (&h->root);
4340 }
4341
4342 static inline struct ppc_link_hash_entry *
4343 ppc_follow_link (struct ppc_link_hash_entry *h)
4344 {
4345 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4346 }
4347
4348 /* Merge PLT info on FROM with that on TO. */
4349
4350 static void
4351 move_plt_plist (struct ppc_link_hash_entry *from,
4352 struct ppc_link_hash_entry *to)
4353 {
4354 if (from->elf.plt.plist != NULL)
4355 {
4356 if (to->elf.plt.plist != NULL)
4357 {
4358 struct plt_entry **entp;
4359 struct plt_entry *ent;
4360
4361 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4362 {
4363 struct plt_entry *dent;
4364
4365 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4366 if (dent->addend == ent->addend)
4367 {
4368 dent->plt.refcount += ent->plt.refcount;
4369 *entp = ent->next;
4370 break;
4371 }
4372 if (dent == NULL)
4373 entp = &ent->next;
4374 }
4375 *entp = to->elf.plt.plist;
4376 }
4377
4378 to->elf.plt.plist = from->elf.plt.plist;
4379 from->elf.plt.plist = NULL;
4380 }
4381 }
4382
4383 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4384
4385 static void
4386 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4387 struct elf_link_hash_entry *dir,
4388 struct elf_link_hash_entry *ind)
4389 {
4390 struct ppc_link_hash_entry *edir, *eind;
4391
4392 edir = (struct ppc_link_hash_entry *) dir;
4393 eind = (struct ppc_link_hash_entry *) ind;
4394
4395 /* Copy over any dynamic relocs we may have on the indirect sym. */
4396 if (eind->dyn_relocs != NULL)
4397 {
4398 if (edir->dyn_relocs != NULL)
4399 {
4400 struct ppc_dyn_relocs **pp;
4401 struct ppc_dyn_relocs *p;
4402
4403 /* Add reloc counts against the indirect sym to the direct sym
4404 list. Merge any entries against the same section. */
4405 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4406 {
4407 struct ppc_dyn_relocs *q;
4408
4409 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4410 if (q->sec == p->sec)
4411 {
4412 q->pc_count += p->pc_count;
4413 q->count += p->count;
4414 *pp = p->next;
4415 break;
4416 }
4417 if (q == NULL)
4418 pp = &p->next;
4419 }
4420 *pp = edir->dyn_relocs;
4421 }
4422
4423 edir->dyn_relocs = eind->dyn_relocs;
4424 eind->dyn_relocs = NULL;
4425 }
4426
4427 edir->is_func |= eind->is_func;
4428 edir->is_func_descriptor |= eind->is_func_descriptor;
4429 edir->tls_mask |= eind->tls_mask;
4430 if (eind->oh != NULL)
4431 edir->oh = ppc_follow_link (eind->oh);
4432
4433 /* If called to transfer flags for a weakdef during processing
4434 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4435 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4436 if (!(ELIMINATE_COPY_RELOCS
4437 && eind->elf.root.type != bfd_link_hash_indirect
4438 && edir->elf.dynamic_adjusted))
4439 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4440
4441 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4442 edir->elf.ref_regular |= eind->elf.ref_regular;
4443 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4444 edir->elf.needs_plt |= eind->elf.needs_plt;
4445
4446 /* If we were called to copy over info for a weak sym, that's all. */
4447 if (eind->elf.root.type != bfd_link_hash_indirect)
4448 return;
4449
4450 /* Copy over got entries that we may have already seen to the
4451 symbol which just became indirect. */
4452 if (eind->elf.got.glist != NULL)
4453 {
4454 if (edir->elf.got.glist != NULL)
4455 {
4456 struct got_entry **entp;
4457 struct got_entry *ent;
4458
4459 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4460 {
4461 struct got_entry *dent;
4462
4463 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4464 if (dent->addend == ent->addend
4465 && dent->owner == ent->owner
4466 && dent->tls_type == ent->tls_type)
4467 {
4468 dent->got.refcount += ent->got.refcount;
4469 *entp = ent->next;
4470 break;
4471 }
4472 if (dent == NULL)
4473 entp = &ent->next;
4474 }
4475 *entp = edir->elf.got.glist;
4476 }
4477
4478 edir->elf.got.glist = eind->elf.got.glist;
4479 eind->elf.got.glist = NULL;
4480 }
4481
4482 /* And plt entries. */
4483 move_plt_plist (eind, edir);
4484
4485 if (eind->elf.dynindx != -1)
4486 {
4487 if (edir->elf.dynindx != -1)
4488 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4489 edir->elf.dynstr_index);
4490 edir->elf.dynindx = eind->elf.dynindx;
4491 edir->elf.dynstr_index = eind->elf.dynstr_index;
4492 eind->elf.dynindx = -1;
4493 eind->elf.dynstr_index = 0;
4494 }
4495 }
4496
4497 /* Find the function descriptor hash entry from the given function code
4498 hash entry FH. Link the entries via their OH fields. */
4499
4500 static struct ppc_link_hash_entry *
4501 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4502 {
4503 struct ppc_link_hash_entry *fdh = fh->oh;
4504
4505 if (fdh == NULL)
4506 {
4507 const char *fd_name = fh->elf.root.root.string + 1;
4508
4509 fdh = (struct ppc_link_hash_entry *)
4510 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4511 if (fdh == NULL)
4512 return fdh;
4513
4514 fdh->is_func_descriptor = 1;
4515 fdh->oh = fh;
4516 fh->is_func = 1;
4517 fh->oh = fdh;
4518 }
4519
4520 return ppc_follow_link (fdh);
4521 }
4522
4523 /* Make a fake function descriptor sym for the code sym FH. */
4524
4525 static struct ppc_link_hash_entry *
4526 make_fdh (struct bfd_link_info *info,
4527 struct ppc_link_hash_entry *fh)
4528 {
4529 bfd *abfd;
4530 asymbol *newsym;
4531 struct bfd_link_hash_entry *bh;
4532 struct ppc_link_hash_entry *fdh;
4533
4534 abfd = fh->elf.root.u.undef.abfd;
4535 newsym = bfd_make_empty_symbol (abfd);
4536 newsym->name = fh->elf.root.root.string + 1;
4537 newsym->section = bfd_und_section_ptr;
4538 newsym->value = 0;
4539 newsym->flags = BSF_WEAK;
4540
4541 bh = NULL;
4542 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4543 newsym->flags, newsym->section,
4544 newsym->value, NULL, FALSE, FALSE,
4545 &bh))
4546 return NULL;
4547
4548 fdh = (struct ppc_link_hash_entry *) bh;
4549 fdh->elf.non_elf = 0;
4550 fdh->fake = 1;
4551 fdh->is_func_descriptor = 1;
4552 fdh->oh = fh;
4553 fh->is_func = 1;
4554 fh->oh = fdh;
4555 return fdh;
4556 }
4557
4558 /* Fix function descriptor symbols defined in .opd sections to be
4559 function type. */
4560
4561 static bfd_boolean
4562 ppc64_elf_add_symbol_hook (bfd *ibfd,
4563 struct bfd_link_info *info,
4564 Elf_Internal_Sym *isym,
4565 const char **name ATTRIBUTE_UNUSED,
4566 flagword *flags ATTRIBUTE_UNUSED,
4567 asection **sec,
4568 bfd_vma *value ATTRIBUTE_UNUSED)
4569 {
4570 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4571 {
4572 if ((ibfd->flags & DYNAMIC) == 0)
4573 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4574 }
4575 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4576 ;
4577 else if (*sec != NULL
4578 && strcmp ((*sec)->name, ".opd") == 0)
4579 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4580
4581 return TRUE;
4582 }
4583
4584 /* This function makes an old ABI object reference to ".bar" cause the
4585 inclusion of a new ABI object archive that defines "bar".
4586 NAME is a symbol defined in an archive. Return a symbol in the hash
4587 table that might be satisfied by the archive symbols. */
4588
4589 static struct elf_link_hash_entry *
4590 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4591 struct bfd_link_info *info,
4592 const char *name)
4593 {
4594 struct elf_link_hash_entry *h;
4595 char *dot_name;
4596 size_t len;
4597
4598 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4599 if (h != NULL
4600 /* Don't return this sym if it is a fake function descriptor
4601 created by add_symbol_adjust. */
4602 && !(h->root.type == bfd_link_hash_undefweak
4603 && ((struct ppc_link_hash_entry *) h)->fake))
4604 return h;
4605
4606 if (name[0] == '.')
4607 return h;
4608
4609 len = strlen (name);
4610 dot_name = bfd_alloc (abfd, len + 2);
4611 if (dot_name == NULL)
4612 return (struct elf_link_hash_entry *) 0 - 1;
4613 dot_name[0] = '.';
4614 memcpy (dot_name + 1, name, len + 1);
4615 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4616 bfd_release (abfd, dot_name);
4617 return h;
4618 }
4619
4620 /* This function satisfies all old ABI object references to ".bar" if a
4621 new ABI object defines "bar". Well, at least, undefined dot symbols
4622 are made weak. This stops later archive searches from including an
4623 object if we already have a function descriptor definition. It also
4624 prevents the linker complaining about undefined symbols.
4625 We also check and correct mismatched symbol visibility here. The
4626 most restrictive visibility of the function descriptor and the
4627 function entry symbol is used. */
4628
4629 static bfd_boolean
4630 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4631 {
4632 struct ppc_link_hash_table *htab;
4633 struct ppc_link_hash_entry *fdh;
4634
4635 if (eh->elf.root.type == bfd_link_hash_indirect)
4636 return TRUE;
4637
4638 if (eh->elf.root.type == bfd_link_hash_warning)
4639 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4640
4641 if (eh->elf.root.root.string[0] != '.')
4642 abort ();
4643
4644 htab = ppc_hash_table (info);
4645 if (htab == NULL)
4646 return FALSE;
4647
4648 fdh = lookup_fdh (eh, htab);
4649 if (fdh == NULL)
4650 {
4651 if (!info->relocatable
4652 && (eh->elf.root.type == bfd_link_hash_undefined
4653 || eh->elf.root.type == bfd_link_hash_undefweak)
4654 && eh->elf.ref_regular)
4655 {
4656 /* Make an undefweak function descriptor sym, which is enough to
4657 pull in an --as-needed shared lib, but won't cause link
4658 errors. Archives are handled elsewhere. */
4659 fdh = make_fdh (info, eh);
4660 if (fdh == NULL)
4661 return FALSE;
4662 fdh->elf.ref_regular = 1;
4663 }
4664 }
4665 else
4666 {
4667 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4668 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4669 if (entry_vis < descr_vis)
4670 fdh->elf.other += entry_vis - descr_vis;
4671 else if (entry_vis > descr_vis)
4672 eh->elf.other += descr_vis - entry_vis;
4673
4674 if ((fdh->elf.root.type == bfd_link_hash_defined
4675 || fdh->elf.root.type == bfd_link_hash_defweak)
4676 && eh->elf.root.type == bfd_link_hash_undefined)
4677 {
4678 eh->elf.root.type = bfd_link_hash_undefweak;
4679 eh->was_undefined = 1;
4680 htab->twiddled_syms = 1;
4681 }
4682 }
4683
4684 return TRUE;
4685 }
4686
4687 /* Process list of dot-symbols we made in link_hash_newfunc. */
4688
4689 static bfd_boolean
4690 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4691 {
4692 struct ppc_link_hash_table *htab;
4693 struct ppc_link_hash_entry **p, *eh;
4694
4695 if (!is_ppc64_elf (info->output_bfd))
4696 return TRUE;
4697 htab = ppc_hash_table (info);
4698 if (htab == NULL)
4699 return FALSE;
4700
4701 if (is_ppc64_elf (ibfd))
4702 {
4703 p = &htab->dot_syms;
4704 while ((eh = *p) != NULL)
4705 {
4706 *p = NULL;
4707 if (!add_symbol_adjust (eh, info))
4708 return FALSE;
4709 p = &eh->u.next_dot_sym;
4710 }
4711 }
4712
4713 /* Clear the list for non-ppc64 input files. */
4714 p = &htab->dot_syms;
4715 while ((eh = *p) != NULL)
4716 {
4717 *p = NULL;
4718 p = &eh->u.next_dot_sym;
4719 }
4720
4721 /* We need to fix the undefs list for any syms we have twiddled to
4722 undef_weak. */
4723 if (htab->twiddled_syms)
4724 {
4725 bfd_link_repair_undef_list (&htab->elf.root);
4726 htab->twiddled_syms = 0;
4727 }
4728 return TRUE;
4729 }
4730
4731 /* Undo hash table changes when an --as-needed input file is determined
4732 not to be needed. */
4733
4734 static bfd_boolean
4735 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4736 struct bfd_link_info *info)
4737 {
4738 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4739
4740 if (htab == NULL)
4741 return FALSE;
4742
4743 htab->dot_syms = NULL;
4744 return TRUE;
4745 }
4746
4747 static struct plt_entry **
4748 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4749 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4750 {
4751 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4752 struct plt_entry **local_plt;
4753 unsigned char *local_got_tls_masks;
4754
4755 if (local_got_ents == NULL)
4756 {
4757 bfd_size_type size = symtab_hdr->sh_info;
4758
4759 size *= (sizeof (*local_got_ents)
4760 + sizeof (*local_plt)
4761 + sizeof (*local_got_tls_masks));
4762 local_got_ents = bfd_zalloc (abfd, size);
4763 if (local_got_ents == NULL)
4764 return NULL;
4765 elf_local_got_ents (abfd) = local_got_ents;
4766 }
4767
4768 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4769 {
4770 struct got_entry *ent;
4771
4772 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4773 if (ent->addend == r_addend
4774 && ent->owner == abfd
4775 && ent->tls_type == tls_type)
4776 break;
4777 if (ent == NULL)
4778 {
4779 bfd_size_type amt = sizeof (*ent);
4780 ent = bfd_alloc (abfd, amt);
4781 if (ent == NULL)
4782 return FALSE;
4783 ent->next = local_got_ents[r_symndx];
4784 ent->addend = r_addend;
4785 ent->owner = abfd;
4786 ent->tls_type = tls_type;
4787 ent->is_indirect = FALSE;
4788 ent->got.refcount = 0;
4789 local_got_ents[r_symndx] = ent;
4790 }
4791 ent->got.refcount += 1;
4792 }
4793
4794 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4795 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4796 local_got_tls_masks[r_symndx] |= tls_type;
4797
4798 return local_plt + r_symndx;
4799 }
4800
4801 static bfd_boolean
4802 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4803 {
4804 struct plt_entry *ent;
4805
4806 for (ent = *plist; ent != NULL; ent = ent->next)
4807 if (ent->addend == addend)
4808 break;
4809 if (ent == NULL)
4810 {
4811 bfd_size_type amt = sizeof (*ent);
4812 ent = bfd_alloc (abfd, amt);
4813 if (ent == NULL)
4814 return FALSE;
4815 ent->next = *plist;
4816 ent->addend = addend;
4817 ent->plt.refcount = 0;
4818 *plist = ent;
4819 }
4820 ent->plt.refcount += 1;
4821 return TRUE;
4822 }
4823
4824 static bfd_boolean
4825 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4826 {
4827 return (r_type == R_PPC64_REL24
4828 || r_type == R_PPC64_REL14
4829 || r_type == R_PPC64_REL14_BRTAKEN
4830 || r_type == R_PPC64_REL14_BRNTAKEN
4831 || r_type == R_PPC64_ADDR24
4832 || r_type == R_PPC64_ADDR14
4833 || r_type == R_PPC64_ADDR14_BRTAKEN
4834 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4835 }
4836
4837 /* Look through the relocs for a section during the first phase, and
4838 calculate needed space in the global offset table, procedure
4839 linkage table, and dynamic reloc sections. */
4840
4841 static bfd_boolean
4842 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4843 asection *sec, const Elf_Internal_Rela *relocs)
4844 {
4845 struct ppc_link_hash_table *htab;
4846 Elf_Internal_Shdr *symtab_hdr;
4847 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4848 const Elf_Internal_Rela *rel;
4849 const Elf_Internal_Rela *rel_end;
4850 asection *sreloc;
4851 asection **opd_sym_map;
4852 struct elf_link_hash_entry *tga, *dottga;
4853
4854 if (info->relocatable)
4855 return TRUE;
4856
4857 /* Don't do anything special with non-loaded, non-alloced sections.
4858 In particular, any relocs in such sections should not affect GOT
4859 and PLT reference counting (ie. we don't allow them to create GOT
4860 or PLT entries), there's no possibility or desire to optimize TLS
4861 relocs, and there's not much point in propagating relocs to shared
4862 libs that the dynamic linker won't relocate. */
4863 if ((sec->flags & SEC_ALLOC) == 0)
4864 return TRUE;
4865
4866 BFD_ASSERT (is_ppc64_elf (abfd));
4867
4868 htab = ppc_hash_table (info);
4869 if (htab == NULL)
4870 return FALSE;
4871
4872 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4873 FALSE, FALSE, TRUE);
4874 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4875 FALSE, FALSE, TRUE);
4876 symtab_hdr = &elf_symtab_hdr (abfd);
4877
4878 sym_hashes = elf_sym_hashes (abfd);
4879 sym_hashes_end = (sym_hashes
4880 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4881 - symtab_hdr->sh_info);
4882
4883 sreloc = NULL;
4884 opd_sym_map = NULL;
4885 if (strcmp (sec->name, ".opd") == 0)
4886 {
4887 /* Garbage collection needs some extra help with .opd sections.
4888 We don't want to necessarily keep everything referenced by
4889 relocs in .opd, as that would keep all functions. Instead,
4890 if we reference an .opd symbol (a function descriptor), we
4891 want to keep the function code symbol's section. This is
4892 easy for global symbols, but for local syms we need to keep
4893 information about the associated function section. */
4894 bfd_size_type amt;
4895
4896 amt = sec->size * sizeof (*opd_sym_map) / 8;
4897 opd_sym_map = bfd_zalloc (abfd, amt);
4898 if (opd_sym_map == NULL)
4899 return FALSE;
4900 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4901 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4902 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4903 }
4904
4905 if (htab->sfpr == NULL
4906 && !create_linkage_sections (htab->elf.dynobj, info))
4907 return FALSE;
4908
4909 rel_end = relocs + sec->reloc_count;
4910 for (rel = relocs; rel < rel_end; rel++)
4911 {
4912 unsigned long r_symndx;
4913 struct elf_link_hash_entry *h;
4914 enum elf_ppc64_reloc_type r_type;
4915 int tls_type;
4916 struct _ppc64_elf_section_data *ppc64_sec;
4917 struct plt_entry **ifunc;
4918
4919 r_symndx = ELF64_R_SYM (rel->r_info);
4920 if (r_symndx < symtab_hdr->sh_info)
4921 h = NULL;
4922 else
4923 {
4924 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4925 h = elf_follow_link (h);
4926 }
4927
4928 tls_type = 0;
4929 ifunc = NULL;
4930 if (h != NULL)
4931 {
4932 if (h->type == STT_GNU_IFUNC)
4933 {
4934 h->needs_plt = 1;
4935 ifunc = &h->plt.plist;
4936 }
4937 }
4938 else
4939 {
4940 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4941 abfd, r_symndx);
4942 if (isym == NULL)
4943 return FALSE;
4944
4945 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4946 {
4947 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4948 rel->r_addend, PLT_IFUNC);
4949 if (ifunc == NULL)
4950 return FALSE;
4951 }
4952 }
4953 r_type = ELF64_R_TYPE (rel->r_info);
4954 if (is_branch_reloc (r_type))
4955 {
4956 if (h != NULL && (h == tga || h == dottga))
4957 {
4958 if (rel != relocs
4959 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4960 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4961 /* We have a new-style __tls_get_addr call with a marker
4962 reloc. */
4963 ;
4964 else
4965 /* Mark this section as having an old-style call. */
4966 sec->has_tls_get_addr_call = 1;
4967 }
4968
4969 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4970 if (ifunc != NULL
4971 && !update_plt_info (abfd, ifunc, rel->r_addend))
4972 return FALSE;
4973 }
4974
4975 switch (r_type)
4976 {
4977 case R_PPC64_TLSGD:
4978 case R_PPC64_TLSLD:
4979 /* These special tls relocs tie a call to __tls_get_addr with
4980 its parameter symbol. */
4981 break;
4982
4983 case R_PPC64_GOT_TLSLD16:
4984 case R_PPC64_GOT_TLSLD16_LO:
4985 case R_PPC64_GOT_TLSLD16_HI:
4986 case R_PPC64_GOT_TLSLD16_HA:
4987 tls_type = TLS_TLS | TLS_LD;
4988 goto dogottls;
4989
4990 case R_PPC64_GOT_TLSGD16:
4991 case R_PPC64_GOT_TLSGD16_LO:
4992 case R_PPC64_GOT_TLSGD16_HI:
4993 case R_PPC64_GOT_TLSGD16_HA:
4994 tls_type = TLS_TLS | TLS_GD;
4995 goto dogottls;
4996
4997 case R_PPC64_GOT_TPREL16_DS:
4998 case R_PPC64_GOT_TPREL16_LO_DS:
4999 case R_PPC64_GOT_TPREL16_HI:
5000 case R_PPC64_GOT_TPREL16_HA:
5001 if (!info->executable)
5002 info->flags |= DF_STATIC_TLS;
5003 tls_type = TLS_TLS | TLS_TPREL;
5004 goto dogottls;
5005
5006 case R_PPC64_GOT_DTPREL16_DS:
5007 case R_PPC64_GOT_DTPREL16_LO_DS:
5008 case R_PPC64_GOT_DTPREL16_HI:
5009 case R_PPC64_GOT_DTPREL16_HA:
5010 tls_type = TLS_TLS | TLS_DTPREL;
5011 dogottls:
5012 sec->has_tls_reloc = 1;
5013 /* Fall thru */
5014
5015 case R_PPC64_GOT16:
5016 case R_PPC64_GOT16_DS:
5017 case R_PPC64_GOT16_HA:
5018 case R_PPC64_GOT16_HI:
5019 case R_PPC64_GOT16_LO:
5020 case R_PPC64_GOT16_LO_DS:
5021 /* This symbol requires a global offset table entry. */
5022 sec->has_toc_reloc = 1;
5023 if (r_type == R_PPC64_GOT_TLSLD16
5024 || r_type == R_PPC64_GOT_TLSGD16
5025 || r_type == R_PPC64_GOT_TPREL16_DS
5026 || r_type == R_PPC64_GOT_DTPREL16_DS
5027 || r_type == R_PPC64_GOT16
5028 || r_type == R_PPC64_GOT16_DS)
5029 {
5030 htab->do_multi_toc = 1;
5031 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5032 }
5033
5034 if (ppc64_elf_tdata (abfd)->got == NULL
5035 && !create_got_section (abfd, info))
5036 return FALSE;
5037
5038 if (h != NULL)
5039 {
5040 struct ppc_link_hash_entry *eh;
5041 struct got_entry *ent;
5042
5043 eh = (struct ppc_link_hash_entry *) h;
5044 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5045 if (ent->addend == rel->r_addend
5046 && ent->owner == abfd
5047 && ent->tls_type == tls_type)
5048 break;
5049 if (ent == NULL)
5050 {
5051 bfd_size_type amt = sizeof (*ent);
5052 ent = bfd_alloc (abfd, amt);
5053 if (ent == NULL)
5054 return FALSE;
5055 ent->next = eh->elf.got.glist;
5056 ent->addend = rel->r_addend;
5057 ent->owner = abfd;
5058 ent->tls_type = tls_type;
5059 ent->is_indirect = FALSE;
5060 ent->got.refcount = 0;
5061 eh->elf.got.glist = ent;
5062 }
5063 ent->got.refcount += 1;
5064 eh->tls_mask |= tls_type;
5065 }
5066 else
5067 /* This is a global offset table entry for a local symbol. */
5068 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5069 rel->r_addend, tls_type))
5070 return FALSE;
5071 break;
5072
5073 case R_PPC64_PLT16_HA:
5074 case R_PPC64_PLT16_HI:
5075 case R_PPC64_PLT16_LO:
5076 case R_PPC64_PLT32:
5077 case R_PPC64_PLT64:
5078 /* This symbol requires a procedure linkage table entry. We
5079 actually build the entry in adjust_dynamic_symbol,
5080 because this might be a case of linking PIC code without
5081 linking in any dynamic objects, in which case we don't
5082 need to generate a procedure linkage table after all. */
5083 if (h == NULL)
5084 {
5085 /* It does not make sense to have a procedure linkage
5086 table entry for a local symbol. */
5087 bfd_set_error (bfd_error_bad_value);
5088 return FALSE;
5089 }
5090 else
5091 {
5092 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5093 return FALSE;
5094 h->needs_plt = 1;
5095 if (h->root.root.string[0] == '.'
5096 && h->root.root.string[1] != '\0')
5097 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5098 }
5099 break;
5100
5101 /* The following relocations don't need to propagate the
5102 relocation if linking a shared object since they are
5103 section relative. */
5104 case R_PPC64_SECTOFF:
5105 case R_PPC64_SECTOFF_LO:
5106 case R_PPC64_SECTOFF_HI:
5107 case R_PPC64_SECTOFF_HA:
5108 case R_PPC64_SECTOFF_DS:
5109 case R_PPC64_SECTOFF_LO_DS:
5110 case R_PPC64_DTPREL16:
5111 case R_PPC64_DTPREL16_LO:
5112 case R_PPC64_DTPREL16_HI:
5113 case R_PPC64_DTPREL16_HA:
5114 case R_PPC64_DTPREL16_DS:
5115 case R_PPC64_DTPREL16_LO_DS:
5116 case R_PPC64_DTPREL16_HIGHER:
5117 case R_PPC64_DTPREL16_HIGHERA:
5118 case R_PPC64_DTPREL16_HIGHEST:
5119 case R_PPC64_DTPREL16_HIGHESTA:
5120 break;
5121
5122 /* Nor do these. */
5123 case R_PPC64_REL16:
5124 case R_PPC64_REL16_LO:
5125 case R_PPC64_REL16_HI:
5126 case R_PPC64_REL16_HA:
5127 break;
5128
5129 case R_PPC64_TOC16:
5130 case R_PPC64_TOC16_DS:
5131 htab->do_multi_toc = 1;
5132 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5133 case R_PPC64_TOC16_LO:
5134 case R_PPC64_TOC16_HI:
5135 case R_PPC64_TOC16_HA:
5136 case R_PPC64_TOC16_LO_DS:
5137 sec->has_toc_reloc = 1;
5138 break;
5139
5140 /* This relocation describes the C++ object vtable hierarchy.
5141 Reconstruct it for later use during GC. */
5142 case R_PPC64_GNU_VTINHERIT:
5143 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5144 return FALSE;
5145 break;
5146
5147 /* This relocation describes which C++ vtable entries are actually
5148 used. Record for later use during GC. */
5149 case R_PPC64_GNU_VTENTRY:
5150 BFD_ASSERT (h != NULL);
5151 if (h != NULL
5152 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5153 return FALSE;
5154 break;
5155
5156 case R_PPC64_REL14:
5157 case R_PPC64_REL14_BRTAKEN:
5158 case R_PPC64_REL14_BRNTAKEN:
5159 {
5160 asection *dest = NULL;
5161
5162 /* Heuristic: If jumping outside our section, chances are
5163 we are going to need a stub. */
5164 if (h != NULL)
5165 {
5166 /* If the sym is weak it may be overridden later, so
5167 don't assume we know where a weak sym lives. */
5168 if (h->root.type == bfd_link_hash_defined)
5169 dest = h->root.u.def.section;
5170 }
5171 else
5172 {
5173 Elf_Internal_Sym *isym;
5174
5175 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5176 abfd, r_symndx);
5177 if (isym == NULL)
5178 return FALSE;
5179
5180 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5181 }
5182
5183 if (dest != sec)
5184 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5185 }
5186 /* Fall through. */
5187
5188 case R_PPC64_REL24:
5189 if (h != NULL && ifunc == NULL)
5190 {
5191 /* We may need a .plt entry if the function this reloc
5192 refers to is in a shared lib. */
5193 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5194 return FALSE;
5195 h->needs_plt = 1;
5196 if (h->root.root.string[0] == '.'
5197 && h->root.root.string[1] != '\0')
5198 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5199 if (h == tga || h == dottga)
5200 sec->has_tls_reloc = 1;
5201 }
5202 break;
5203
5204 case R_PPC64_TPREL64:
5205 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5206 if (!info->executable)
5207 info->flags |= DF_STATIC_TLS;
5208 goto dotlstoc;
5209
5210 case R_PPC64_DTPMOD64:
5211 if (rel + 1 < rel_end
5212 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5213 && rel[1].r_offset == rel->r_offset + 8)
5214 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5215 else
5216 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5217 goto dotlstoc;
5218
5219 case R_PPC64_DTPREL64:
5220 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5221 if (rel != relocs
5222 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5223 && rel[-1].r_offset == rel->r_offset - 8)
5224 /* This is the second reloc of a dtpmod, dtprel pair.
5225 Don't mark with TLS_DTPREL. */
5226 goto dodyn;
5227
5228 dotlstoc:
5229 sec->has_tls_reloc = 1;
5230 if (h != NULL)
5231 {
5232 struct ppc_link_hash_entry *eh;
5233 eh = (struct ppc_link_hash_entry *) h;
5234 eh->tls_mask |= tls_type;
5235 }
5236 else
5237 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5238 rel->r_addend, tls_type))
5239 return FALSE;
5240
5241 ppc64_sec = ppc64_elf_section_data (sec);
5242 if (ppc64_sec->sec_type != sec_toc)
5243 {
5244 bfd_size_type amt;
5245
5246 /* One extra to simplify get_tls_mask. */
5247 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5248 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5249 if (ppc64_sec->u.toc.symndx == NULL)
5250 return FALSE;
5251 amt = sec->size * sizeof (bfd_vma) / 8;
5252 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5253 if (ppc64_sec->u.toc.add == NULL)
5254 return FALSE;
5255 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5256 ppc64_sec->sec_type = sec_toc;
5257 }
5258 BFD_ASSERT (rel->r_offset % 8 == 0);
5259 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5260 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5261
5262 /* Mark the second slot of a GD or LD entry.
5263 -1 to indicate GD and -2 to indicate LD. */
5264 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5265 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5266 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5267 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5268 goto dodyn;
5269
5270 case R_PPC64_TPREL16:
5271 case R_PPC64_TPREL16_LO:
5272 case R_PPC64_TPREL16_HI:
5273 case R_PPC64_TPREL16_HA:
5274 case R_PPC64_TPREL16_DS:
5275 case R_PPC64_TPREL16_LO_DS:
5276 case R_PPC64_TPREL16_HIGHER:
5277 case R_PPC64_TPREL16_HIGHERA:
5278 case R_PPC64_TPREL16_HIGHEST:
5279 case R_PPC64_TPREL16_HIGHESTA:
5280 if (info->shared)
5281 {
5282 if (!info->executable)
5283 info->flags |= DF_STATIC_TLS;
5284 goto dodyn;
5285 }
5286 break;
5287
5288 case R_PPC64_ADDR64:
5289 if (opd_sym_map != NULL
5290 && rel + 1 < rel_end
5291 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5292 {
5293 if (h != NULL)
5294 {
5295 if (h->root.root.string[0] == '.'
5296 && h->root.root.string[1] != 0
5297 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5298 ;
5299 else
5300 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5301 }
5302 else
5303 {
5304 asection *s;
5305 Elf_Internal_Sym *isym;
5306
5307 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5308 abfd, r_symndx);
5309 if (isym == NULL)
5310 return FALSE;
5311
5312 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5313 if (s != NULL && s != sec)
5314 opd_sym_map[rel->r_offset / 8] = s;
5315 }
5316 }
5317 /* Fall through. */
5318
5319 case R_PPC64_REL30:
5320 case R_PPC64_REL32:
5321 case R_PPC64_REL64:
5322 case R_PPC64_ADDR14:
5323 case R_PPC64_ADDR14_BRNTAKEN:
5324 case R_PPC64_ADDR14_BRTAKEN:
5325 case R_PPC64_ADDR16:
5326 case R_PPC64_ADDR16_DS:
5327 case R_PPC64_ADDR16_HA:
5328 case R_PPC64_ADDR16_HI:
5329 case R_PPC64_ADDR16_HIGHER:
5330 case R_PPC64_ADDR16_HIGHERA:
5331 case R_PPC64_ADDR16_HIGHEST:
5332 case R_PPC64_ADDR16_HIGHESTA:
5333 case R_PPC64_ADDR16_LO:
5334 case R_PPC64_ADDR16_LO_DS:
5335 case R_PPC64_ADDR24:
5336 case R_PPC64_ADDR32:
5337 case R_PPC64_UADDR16:
5338 case R_PPC64_UADDR32:
5339 case R_PPC64_UADDR64:
5340 case R_PPC64_TOC:
5341 if (h != NULL && !info->shared)
5342 /* We may need a copy reloc. */
5343 h->non_got_ref = 1;
5344
5345 /* Don't propagate .opd relocs. */
5346 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5347 break;
5348
5349 /* If we are creating a shared library, and this is a reloc
5350 against a global symbol, or a non PC relative reloc
5351 against a local symbol, then we need to copy the reloc
5352 into the shared library. However, if we are linking with
5353 -Bsymbolic, we do not need to copy a reloc against a
5354 global symbol which is defined in an object we are
5355 including in the link (i.e., DEF_REGULAR is set). At
5356 this point we have not seen all the input files, so it is
5357 possible that DEF_REGULAR is not set now but will be set
5358 later (it is never cleared). In case of a weak definition,
5359 DEF_REGULAR may be cleared later by a strong definition in
5360 a shared library. We account for that possibility below by
5361 storing information in the dyn_relocs field of the hash
5362 table entry. A similar situation occurs when creating
5363 shared libraries and symbol visibility changes render the
5364 symbol local.
5365
5366 If on the other hand, we are creating an executable, we
5367 may need to keep relocations for symbols satisfied by a
5368 dynamic library if we manage to avoid copy relocs for the
5369 symbol. */
5370 dodyn:
5371 if ((info->shared
5372 && (must_be_dyn_reloc (info, r_type)
5373 || (h != NULL
5374 && (! info->symbolic
5375 || h->root.type == bfd_link_hash_defweak
5376 || !h->def_regular))))
5377 || (ELIMINATE_COPY_RELOCS
5378 && !info->shared
5379 && h != NULL
5380 && (h->root.type == bfd_link_hash_defweak
5381 || !h->def_regular))
5382 || (!info->shared
5383 && ifunc != NULL))
5384 {
5385 struct ppc_dyn_relocs *p;
5386 struct ppc_dyn_relocs **head;
5387
5388 /* We must copy these reloc types into the output file.
5389 Create a reloc section in dynobj and make room for
5390 this reloc. */
5391 if (sreloc == NULL)
5392 {
5393 sreloc = _bfd_elf_make_dynamic_reloc_section
5394 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5395
5396 if (sreloc == NULL)
5397 return FALSE;
5398 }
5399
5400 /* If this is a global symbol, we count the number of
5401 relocations we need for this symbol. */
5402 if (h != NULL)
5403 {
5404 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5405 }
5406 else
5407 {
5408 /* Track dynamic relocs needed for local syms too.
5409 We really need local syms available to do this
5410 easily. Oh well. */
5411 asection *s;
5412 void *vpp;
5413 Elf_Internal_Sym *isym;
5414
5415 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5416 abfd, r_symndx);
5417 if (isym == NULL)
5418 return FALSE;
5419
5420 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5421 if (s == NULL)
5422 s = sec;
5423
5424 vpp = &elf_section_data (s)->local_dynrel;
5425 head = (struct ppc_dyn_relocs **) vpp;
5426 }
5427
5428 p = *head;
5429 if (p == NULL || p->sec != sec)
5430 {
5431 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5432 if (p == NULL)
5433 return FALSE;
5434 p->next = *head;
5435 *head = p;
5436 p->sec = sec;
5437 p->count = 0;
5438 p->pc_count = 0;
5439 }
5440
5441 p->count += 1;
5442 if (!must_be_dyn_reloc (info, r_type))
5443 p->pc_count += 1;
5444 }
5445 break;
5446
5447 default:
5448 break;
5449 }
5450 }
5451
5452 return TRUE;
5453 }
5454
5455 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5456 of the code entry point, and its section. */
5457
5458 static bfd_vma
5459 opd_entry_value (asection *opd_sec,
5460 bfd_vma offset,
5461 asection **code_sec,
5462 bfd_vma *code_off)
5463 {
5464 bfd *opd_bfd = opd_sec->owner;
5465 Elf_Internal_Rela *relocs;
5466 Elf_Internal_Rela *lo, *hi, *look;
5467 bfd_vma val;
5468
5469 /* No relocs implies we are linking a --just-symbols object. */
5470 if (opd_sec->reloc_count == 0)
5471 {
5472 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5473 return (bfd_vma) -1;
5474
5475 if (code_sec != NULL)
5476 {
5477 asection *sec, *likely = NULL;
5478 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5479 if (sec->vma <= val
5480 && (sec->flags & SEC_LOAD) != 0
5481 && (sec->flags & SEC_ALLOC) != 0)
5482 likely = sec;
5483 if (likely != NULL)
5484 {
5485 *code_sec = likely;
5486 if (code_off != NULL)
5487 *code_off = val - likely->vma;
5488 }
5489 }
5490 return val;
5491 }
5492
5493 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5494
5495 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5496 if (relocs == NULL)
5497 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5498
5499 /* Go find the opd reloc at the sym address. */
5500 lo = relocs;
5501 BFD_ASSERT (lo != NULL);
5502 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5503 val = (bfd_vma) -1;
5504 while (lo < hi)
5505 {
5506 look = lo + (hi - lo) / 2;
5507 if (look->r_offset < offset)
5508 lo = look + 1;
5509 else if (look->r_offset > offset)
5510 hi = look;
5511 else
5512 {
5513 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5514
5515 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5516 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5517 {
5518 unsigned long symndx = ELF64_R_SYM (look->r_info);
5519 asection *sec;
5520
5521 if (symndx < symtab_hdr->sh_info)
5522 {
5523 Elf_Internal_Sym *sym;
5524
5525 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5526 if (sym == NULL)
5527 {
5528 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5529 symtab_hdr->sh_info,
5530 0, NULL, NULL, NULL);
5531 if (sym == NULL)
5532 break;
5533 symtab_hdr->contents = (bfd_byte *) sym;
5534 }
5535
5536 sym += symndx;
5537 val = sym->st_value;
5538 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5539 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5540 }
5541 else
5542 {
5543 struct elf_link_hash_entry **sym_hashes;
5544 struct elf_link_hash_entry *rh;
5545
5546 sym_hashes = elf_sym_hashes (opd_bfd);
5547 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5548 rh = elf_follow_link (rh);
5549 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5550 || rh->root.type == bfd_link_hash_defweak);
5551 val = rh->root.u.def.value;
5552 sec = rh->root.u.def.section;
5553 }
5554 val += look->r_addend;
5555 if (code_off != NULL)
5556 *code_off = val;
5557 if (code_sec != NULL)
5558 *code_sec = sec;
5559 if (sec != NULL && sec->output_section != NULL)
5560 val += sec->output_section->vma + sec->output_offset;
5561 }
5562 break;
5563 }
5564 }
5565
5566 return val;
5567 }
5568
5569 /* Return true if symbol is defined in a regular object file. */
5570
5571 static bfd_boolean
5572 is_static_defined (struct elf_link_hash_entry *h)
5573 {
5574 return ((h->root.type == bfd_link_hash_defined
5575 || h->root.type == bfd_link_hash_defweak)
5576 && h->root.u.def.section != NULL
5577 && h->root.u.def.section->output_section != NULL);
5578 }
5579
5580 /* If FDH is a function descriptor symbol, return the associated code
5581 entry symbol if it is defined. Return NULL otherwise. */
5582
5583 static struct ppc_link_hash_entry *
5584 defined_code_entry (struct ppc_link_hash_entry *fdh)
5585 {
5586 if (fdh->is_func_descriptor)
5587 {
5588 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5589 if (fh->elf.root.type == bfd_link_hash_defined
5590 || fh->elf.root.type == bfd_link_hash_defweak)
5591 return fh;
5592 }
5593 return NULL;
5594 }
5595
5596 /* If FH is a function code entry symbol, return the associated
5597 function descriptor symbol if it is defined. Return NULL otherwise. */
5598
5599 static struct ppc_link_hash_entry *
5600 defined_func_desc (struct ppc_link_hash_entry *fh)
5601 {
5602 if (fh->oh != NULL
5603 && fh->oh->is_func_descriptor)
5604 {
5605 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5606 if (fdh->elf.root.type == bfd_link_hash_defined
5607 || fdh->elf.root.type == bfd_link_hash_defweak)
5608 return fdh;
5609 }
5610 return NULL;
5611 }
5612
5613 /* Mark all our entry sym sections, both opd and code section. */
5614
5615 static void
5616 ppc64_elf_gc_keep (struct bfd_link_info *info)
5617 {
5618 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5619 struct bfd_sym_chain *sym;
5620
5621 if (htab == NULL)
5622 return;
5623
5624 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5625 {
5626 struct ppc_link_hash_entry *eh, *fh;
5627 asection *sec;
5628
5629 eh = (struct ppc_link_hash_entry *)
5630 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5631 if (eh == NULL)
5632 continue;
5633 if (eh->elf.root.type != bfd_link_hash_defined
5634 && eh->elf.root.type != bfd_link_hash_defweak)
5635 continue;
5636
5637 fh = defined_code_entry (eh);
5638 if (fh != NULL)
5639 {
5640 sec = fh->elf.root.u.def.section;
5641 sec->flags |= SEC_KEEP;
5642 }
5643 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5644 && opd_entry_value (eh->elf.root.u.def.section,
5645 eh->elf.root.u.def.value,
5646 &sec, NULL) != (bfd_vma) -1)
5647 sec->flags |= SEC_KEEP;
5648
5649 sec = eh->elf.root.u.def.section;
5650 sec->flags |= SEC_KEEP;
5651 }
5652 }
5653
5654 /* Mark sections containing dynamically referenced symbols. When
5655 building shared libraries, we must assume that any visible symbol is
5656 referenced. */
5657
5658 static bfd_boolean
5659 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5660 {
5661 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5662 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5663 struct ppc_link_hash_entry *fdh;
5664
5665 if (eh->elf.root.type == bfd_link_hash_warning)
5666 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5667
5668 /* Dynamic linking info is on the func descriptor sym. */
5669 fdh = defined_func_desc (eh);
5670 if (fdh != NULL)
5671 eh = fdh;
5672
5673 if ((eh->elf.root.type == bfd_link_hash_defined
5674 || eh->elf.root.type == bfd_link_hash_defweak)
5675 && (eh->elf.ref_dynamic
5676 || (!info->executable
5677 && eh->elf.def_regular
5678 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5679 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5680 {
5681 asection *code_sec;
5682 struct ppc_link_hash_entry *fh;
5683
5684 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5685
5686 /* Function descriptor syms cause the associated
5687 function code sym section to be marked. */
5688 fh = defined_code_entry (eh);
5689 if (fh != NULL)
5690 {
5691 code_sec = fh->elf.root.u.def.section;
5692 code_sec->flags |= SEC_KEEP;
5693 }
5694 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5695 && opd_entry_value (eh->elf.root.u.def.section,
5696 eh->elf.root.u.def.value,
5697 &code_sec, NULL) != (bfd_vma) -1)
5698 code_sec->flags |= SEC_KEEP;
5699 }
5700
5701 return TRUE;
5702 }
5703
5704 /* Return the section that should be marked against GC for a given
5705 relocation. */
5706
5707 static asection *
5708 ppc64_elf_gc_mark_hook (asection *sec,
5709 struct bfd_link_info *info,
5710 Elf_Internal_Rela *rel,
5711 struct elf_link_hash_entry *h,
5712 Elf_Internal_Sym *sym)
5713 {
5714 asection *rsec;
5715
5716 /* Syms return NULL if we're marking .opd, so we avoid marking all
5717 function sections, as all functions are referenced in .opd. */
5718 rsec = NULL;
5719 if (get_opd_info (sec) != NULL)
5720 return rsec;
5721
5722 if (h != NULL)
5723 {
5724 enum elf_ppc64_reloc_type r_type;
5725 struct ppc_link_hash_entry *eh, *fh, *fdh;
5726
5727 r_type = ELF64_R_TYPE (rel->r_info);
5728 switch (r_type)
5729 {
5730 case R_PPC64_GNU_VTINHERIT:
5731 case R_PPC64_GNU_VTENTRY:
5732 break;
5733
5734 default:
5735 switch (h->root.type)
5736 {
5737 case bfd_link_hash_defined:
5738 case bfd_link_hash_defweak:
5739 eh = (struct ppc_link_hash_entry *) h;
5740 fdh = defined_func_desc (eh);
5741 if (fdh != NULL)
5742 eh = fdh;
5743
5744 /* Function descriptor syms cause the associated
5745 function code sym section to be marked. */
5746 fh = defined_code_entry (eh);
5747 if (fh != NULL)
5748 {
5749 /* They also mark their opd section. */
5750 eh->elf.root.u.def.section->gc_mark = 1;
5751
5752 rsec = fh->elf.root.u.def.section;
5753 }
5754 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5755 && opd_entry_value (eh->elf.root.u.def.section,
5756 eh->elf.root.u.def.value,
5757 &rsec, NULL) != (bfd_vma) -1)
5758 eh->elf.root.u.def.section->gc_mark = 1;
5759 else
5760 rsec = h->root.u.def.section;
5761 break;
5762
5763 case bfd_link_hash_common:
5764 rsec = h->root.u.c.p->section;
5765 break;
5766
5767 default:
5768 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5769 }
5770 }
5771 }
5772 else
5773 {
5774 struct _opd_sec_data *opd;
5775
5776 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5777 opd = get_opd_info (rsec);
5778 if (opd != NULL && opd->func_sec != NULL)
5779 {
5780 rsec->gc_mark = 1;
5781
5782 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5783 }
5784 }
5785
5786 return rsec;
5787 }
5788
5789 /* Update the .got, .plt. and dynamic reloc reference counts for the
5790 section being removed. */
5791
5792 static bfd_boolean
5793 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5794 asection *sec, const Elf_Internal_Rela *relocs)
5795 {
5796 struct ppc_link_hash_table *htab;
5797 Elf_Internal_Shdr *symtab_hdr;
5798 struct elf_link_hash_entry **sym_hashes;
5799 struct got_entry **local_got_ents;
5800 const Elf_Internal_Rela *rel, *relend;
5801
5802 if (info->relocatable)
5803 return TRUE;
5804
5805 if ((sec->flags & SEC_ALLOC) == 0)
5806 return TRUE;
5807
5808 elf_section_data (sec)->local_dynrel = NULL;
5809
5810 htab = ppc_hash_table (info);
5811 if (htab == NULL)
5812 return FALSE;
5813
5814 symtab_hdr = &elf_symtab_hdr (abfd);
5815 sym_hashes = elf_sym_hashes (abfd);
5816 local_got_ents = elf_local_got_ents (abfd);
5817
5818 relend = relocs + sec->reloc_count;
5819 for (rel = relocs; rel < relend; rel++)
5820 {
5821 unsigned long r_symndx;
5822 enum elf_ppc64_reloc_type r_type;
5823 struct elf_link_hash_entry *h = NULL;
5824 unsigned char tls_type = 0;
5825
5826 r_symndx = ELF64_R_SYM (rel->r_info);
5827 r_type = ELF64_R_TYPE (rel->r_info);
5828 if (r_symndx >= symtab_hdr->sh_info)
5829 {
5830 struct ppc_link_hash_entry *eh;
5831 struct ppc_dyn_relocs **pp;
5832 struct ppc_dyn_relocs *p;
5833
5834 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5835 h = elf_follow_link (h);
5836 eh = (struct ppc_link_hash_entry *) h;
5837
5838 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5839 if (p->sec == sec)
5840 {
5841 /* Everything must go for SEC. */
5842 *pp = p->next;
5843 break;
5844 }
5845 }
5846
5847 if (is_branch_reloc (r_type))
5848 {
5849 struct plt_entry **ifunc = NULL;
5850 if (h != NULL)
5851 {
5852 if (h->type == STT_GNU_IFUNC)
5853 ifunc = &h->plt.plist;
5854 }
5855 else if (local_got_ents != NULL)
5856 {
5857 struct plt_entry **local_plt = (struct plt_entry **)
5858 (local_got_ents + symtab_hdr->sh_info);
5859 unsigned char *local_got_tls_masks = (unsigned char *)
5860 (local_plt + symtab_hdr->sh_info);
5861 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5862 ifunc = local_plt + r_symndx;
5863 }
5864 if (ifunc != NULL)
5865 {
5866 struct plt_entry *ent;
5867
5868 for (ent = *ifunc; ent != NULL; ent = ent->next)
5869 if (ent->addend == rel->r_addend)
5870 break;
5871 if (ent == NULL)
5872 abort ();
5873 if (ent->plt.refcount > 0)
5874 ent->plt.refcount -= 1;
5875 continue;
5876 }
5877 }
5878
5879 switch (r_type)
5880 {
5881 case R_PPC64_GOT_TLSLD16:
5882 case R_PPC64_GOT_TLSLD16_LO:
5883 case R_PPC64_GOT_TLSLD16_HI:
5884 case R_PPC64_GOT_TLSLD16_HA:
5885 tls_type = TLS_TLS | TLS_LD;
5886 goto dogot;
5887
5888 case R_PPC64_GOT_TLSGD16:
5889 case R_PPC64_GOT_TLSGD16_LO:
5890 case R_PPC64_GOT_TLSGD16_HI:
5891 case R_PPC64_GOT_TLSGD16_HA:
5892 tls_type = TLS_TLS | TLS_GD;
5893 goto dogot;
5894
5895 case R_PPC64_GOT_TPREL16_DS:
5896 case R_PPC64_GOT_TPREL16_LO_DS:
5897 case R_PPC64_GOT_TPREL16_HI:
5898 case R_PPC64_GOT_TPREL16_HA:
5899 tls_type = TLS_TLS | TLS_TPREL;
5900 goto dogot;
5901
5902 case R_PPC64_GOT_DTPREL16_DS:
5903 case R_PPC64_GOT_DTPREL16_LO_DS:
5904 case R_PPC64_GOT_DTPREL16_HI:
5905 case R_PPC64_GOT_DTPREL16_HA:
5906 tls_type = TLS_TLS | TLS_DTPREL;
5907 goto dogot;
5908
5909 case R_PPC64_GOT16:
5910 case R_PPC64_GOT16_DS:
5911 case R_PPC64_GOT16_HA:
5912 case R_PPC64_GOT16_HI:
5913 case R_PPC64_GOT16_LO:
5914 case R_PPC64_GOT16_LO_DS:
5915 dogot:
5916 {
5917 struct got_entry *ent;
5918
5919 if (h != NULL)
5920 ent = h->got.glist;
5921 else
5922 ent = local_got_ents[r_symndx];
5923
5924 for (; ent != NULL; ent = ent->next)
5925 if (ent->addend == rel->r_addend
5926 && ent->owner == abfd
5927 && ent->tls_type == tls_type)
5928 break;
5929 if (ent == NULL)
5930 abort ();
5931 if (ent->got.refcount > 0)
5932 ent->got.refcount -= 1;
5933 }
5934 break;
5935
5936 case R_PPC64_PLT16_HA:
5937 case R_PPC64_PLT16_HI:
5938 case R_PPC64_PLT16_LO:
5939 case R_PPC64_PLT32:
5940 case R_PPC64_PLT64:
5941 case R_PPC64_REL14:
5942 case R_PPC64_REL14_BRNTAKEN:
5943 case R_PPC64_REL14_BRTAKEN:
5944 case R_PPC64_REL24:
5945 if (h != NULL)
5946 {
5947 struct plt_entry *ent;
5948
5949 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5950 if (ent->addend == rel->r_addend)
5951 break;
5952 if (ent != NULL && ent->plt.refcount > 0)
5953 ent->plt.refcount -= 1;
5954 }
5955 break;
5956
5957 default:
5958 break;
5959 }
5960 }
5961 return TRUE;
5962 }
5963
5964 /* The maximum size of .sfpr. */
5965 #define SFPR_MAX (218*4)
5966
5967 struct sfpr_def_parms
5968 {
5969 const char name[12];
5970 unsigned char lo, hi;
5971 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5972 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5973 };
5974
5975 /* Auto-generate _save*, _rest* functions in .sfpr. */
5976
5977 static bfd_boolean
5978 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5979 {
5980 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5981 unsigned int i;
5982 size_t len = strlen (parm->name);
5983 bfd_boolean writing = FALSE;
5984 char sym[16];
5985
5986 if (htab == NULL)
5987 return FALSE;
5988
5989 memcpy (sym, parm->name, len);
5990 sym[len + 2] = 0;
5991
5992 for (i = parm->lo; i <= parm->hi; i++)
5993 {
5994 struct elf_link_hash_entry *h;
5995
5996 sym[len + 0] = i / 10 + '0';
5997 sym[len + 1] = i % 10 + '0';
5998 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5999 if (h != NULL
6000 && !h->def_regular)
6001 {
6002 h->root.type = bfd_link_hash_defined;
6003 h->root.u.def.section = htab->sfpr;
6004 h->root.u.def.value = htab->sfpr->size;
6005 h->type = STT_FUNC;
6006 h->def_regular = 1;
6007 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6008 writing = TRUE;
6009 if (htab->sfpr->contents == NULL)
6010 {
6011 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6012 if (htab->sfpr->contents == NULL)
6013 return FALSE;
6014 }
6015 }
6016 if (writing)
6017 {
6018 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6019 if (i != parm->hi)
6020 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6021 else
6022 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6023 htab->sfpr->size = p - htab->sfpr->contents;
6024 }
6025 }
6026
6027 return TRUE;
6028 }
6029
6030 static bfd_byte *
6031 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6032 {
6033 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6034 return p + 4;
6035 }
6036
6037 static bfd_byte *
6038 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6039 {
6040 p = savegpr0 (abfd, p, r);
6041 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6042 p = p + 4;
6043 bfd_put_32 (abfd, BLR, p);
6044 return p + 4;
6045 }
6046
6047 static bfd_byte *
6048 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6049 {
6050 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6051 return p + 4;
6052 }
6053
6054 static bfd_byte *
6055 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6056 {
6057 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6058 p = p + 4;
6059 p = restgpr0 (abfd, p, r);
6060 bfd_put_32 (abfd, MTLR_R0, p);
6061 p = p + 4;
6062 if (r == 29)
6063 {
6064 p = restgpr0 (abfd, p, 30);
6065 p = restgpr0 (abfd, p, 31);
6066 }
6067 bfd_put_32 (abfd, BLR, p);
6068 return p + 4;
6069 }
6070
6071 static bfd_byte *
6072 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6073 {
6074 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6075 return p + 4;
6076 }
6077
6078 static bfd_byte *
6079 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6080 {
6081 p = savegpr1 (abfd, p, r);
6082 bfd_put_32 (abfd, BLR, p);
6083 return p + 4;
6084 }
6085
6086 static bfd_byte *
6087 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6088 {
6089 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6090 return p + 4;
6091 }
6092
6093 static bfd_byte *
6094 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6095 {
6096 p = restgpr1 (abfd, p, r);
6097 bfd_put_32 (abfd, BLR, p);
6098 return p + 4;
6099 }
6100
6101 static bfd_byte *
6102 savefpr (bfd *abfd, bfd_byte *p, int r)
6103 {
6104 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6105 return p + 4;
6106 }
6107
6108 static bfd_byte *
6109 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6110 {
6111 p = savefpr (abfd, p, r);
6112 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6113 p = p + 4;
6114 bfd_put_32 (abfd, BLR, p);
6115 return p + 4;
6116 }
6117
6118 static bfd_byte *
6119 restfpr (bfd *abfd, bfd_byte *p, int r)
6120 {
6121 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6122 return p + 4;
6123 }
6124
6125 static bfd_byte *
6126 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6127 {
6128 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6129 p = p + 4;
6130 p = restfpr (abfd, p, r);
6131 bfd_put_32 (abfd, MTLR_R0, p);
6132 p = p + 4;
6133 if (r == 29)
6134 {
6135 p = restfpr (abfd, p, 30);
6136 p = restfpr (abfd, p, 31);
6137 }
6138 bfd_put_32 (abfd, BLR, p);
6139 return p + 4;
6140 }
6141
6142 static bfd_byte *
6143 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6144 {
6145 p = savefpr (abfd, p, r);
6146 bfd_put_32 (abfd, BLR, p);
6147 return p + 4;
6148 }
6149
6150 static bfd_byte *
6151 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6152 {
6153 p = restfpr (abfd, p, r);
6154 bfd_put_32 (abfd, BLR, p);
6155 return p + 4;
6156 }
6157
6158 static bfd_byte *
6159 savevr (bfd *abfd, bfd_byte *p, int r)
6160 {
6161 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6162 p = p + 4;
6163 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6164 return p + 4;
6165 }
6166
6167 static bfd_byte *
6168 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6169 {
6170 p = savevr (abfd, p, r);
6171 bfd_put_32 (abfd, BLR, p);
6172 return p + 4;
6173 }
6174
6175 static bfd_byte *
6176 restvr (bfd *abfd, bfd_byte *p, int r)
6177 {
6178 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6179 p = p + 4;
6180 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6181 return p + 4;
6182 }
6183
6184 static bfd_byte *
6185 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6186 {
6187 p = restvr (abfd, p, r);
6188 bfd_put_32 (abfd, BLR, p);
6189 return p + 4;
6190 }
6191
6192 /* Called via elf_link_hash_traverse to transfer dynamic linking
6193 information on function code symbol entries to their corresponding
6194 function descriptor symbol entries. */
6195
6196 static bfd_boolean
6197 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6198 {
6199 struct bfd_link_info *info;
6200 struct ppc_link_hash_table *htab;
6201 struct plt_entry *ent;
6202 struct ppc_link_hash_entry *fh;
6203 struct ppc_link_hash_entry *fdh;
6204 bfd_boolean force_local;
6205
6206 fh = (struct ppc_link_hash_entry *) h;
6207 if (fh->elf.root.type == bfd_link_hash_indirect)
6208 return TRUE;
6209
6210 if (fh->elf.root.type == bfd_link_hash_warning)
6211 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6212
6213 info = inf;
6214 htab = ppc_hash_table (info);
6215 if (htab == NULL)
6216 return FALSE;
6217
6218 /* Resolve undefined references to dot-symbols as the value
6219 in the function descriptor, if we have one in a regular object.
6220 This is to satisfy cases like ".quad .foo". Calls to functions
6221 in dynamic objects are handled elsewhere. */
6222 if (fh->elf.root.type == bfd_link_hash_undefweak
6223 && fh->was_undefined
6224 && (fdh = defined_func_desc (fh)) != NULL
6225 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6226 && opd_entry_value (fdh->elf.root.u.def.section,
6227 fdh->elf.root.u.def.value,
6228 &fh->elf.root.u.def.section,
6229 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6230 {
6231 fh->elf.root.type = fdh->elf.root.type;
6232 fh->elf.forced_local = 1;
6233 fh->elf.def_regular = fdh->elf.def_regular;
6234 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6235 }
6236
6237 /* If this is a function code symbol, transfer dynamic linking
6238 information to the function descriptor symbol. */
6239 if (!fh->is_func)
6240 return TRUE;
6241
6242 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6243 if (ent->plt.refcount > 0)
6244 break;
6245 if (ent == NULL
6246 || fh->elf.root.root.string[0] != '.'
6247 || fh->elf.root.root.string[1] == '\0')
6248 return TRUE;
6249
6250 /* Find the corresponding function descriptor symbol. Create it
6251 as undefined if necessary. */
6252
6253 fdh = lookup_fdh (fh, htab);
6254 if (fdh == NULL
6255 && !info->executable
6256 && (fh->elf.root.type == bfd_link_hash_undefined
6257 || fh->elf.root.type == bfd_link_hash_undefweak))
6258 {
6259 fdh = make_fdh (info, fh);
6260 if (fdh == NULL)
6261 return FALSE;
6262 }
6263
6264 /* Fake function descriptors are made undefweak. If the function
6265 code symbol is strong undefined, make the fake sym the same.
6266 If the function code symbol is defined, then force the fake
6267 descriptor local; We can't support overriding of symbols in a
6268 shared library on a fake descriptor. */
6269
6270 if (fdh != NULL
6271 && fdh->fake
6272 && fdh->elf.root.type == bfd_link_hash_undefweak)
6273 {
6274 if (fh->elf.root.type == bfd_link_hash_undefined)
6275 {
6276 fdh->elf.root.type = bfd_link_hash_undefined;
6277 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6278 }
6279 else if (fh->elf.root.type == bfd_link_hash_defined
6280 || fh->elf.root.type == bfd_link_hash_defweak)
6281 {
6282 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6283 }
6284 }
6285
6286 if (fdh != NULL
6287 && !fdh->elf.forced_local
6288 && (!info->executable
6289 || fdh->elf.def_dynamic
6290 || fdh->elf.ref_dynamic
6291 || (fdh->elf.root.type == bfd_link_hash_undefweak
6292 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6293 {
6294 if (fdh->elf.dynindx == -1)
6295 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6296 return FALSE;
6297 fdh->elf.ref_regular |= fh->elf.ref_regular;
6298 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6299 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6300 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6301 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6302 {
6303 move_plt_plist (fh, fdh);
6304 fdh->elf.needs_plt = 1;
6305 }
6306 fdh->is_func_descriptor = 1;
6307 fdh->oh = fh;
6308 fh->oh = fdh;
6309 }
6310
6311 /* Now that the info is on the function descriptor, clear the
6312 function code sym info. Any function code syms for which we
6313 don't have a definition in a regular file, we force local.
6314 This prevents a shared library from exporting syms that have
6315 been imported from another library. Function code syms that
6316 are really in the library we must leave global to prevent the
6317 linker dragging in a definition from a static library. */
6318 force_local = (!fh->elf.def_regular
6319 || fdh == NULL
6320 || !fdh->elf.def_regular
6321 || fdh->elf.forced_local);
6322 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6323
6324 return TRUE;
6325 }
6326
6327 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6328 this hook to a) provide some gcc support functions, and b) transfer
6329 dynamic linking information gathered so far on function code symbol
6330 entries, to their corresponding function descriptor symbol entries. */
6331
6332 static bfd_boolean
6333 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6334 struct bfd_link_info *info)
6335 {
6336 struct ppc_link_hash_table *htab;
6337 unsigned int i;
6338 const struct sfpr_def_parms funcs[] =
6339 {
6340 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6341 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6342 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6343 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6344 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6345 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6346 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6347 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6348 { "._savef", 14, 31, savefpr, savefpr1_tail },
6349 { "._restf", 14, 31, restfpr, restfpr1_tail },
6350 { "_savevr_", 20, 31, savevr, savevr_tail },
6351 { "_restvr_", 20, 31, restvr, restvr_tail }
6352 };
6353
6354 htab = ppc_hash_table (info);
6355 if (htab == NULL)
6356 return FALSE;
6357
6358 if (htab->sfpr == NULL)
6359 /* We don't have any relocs. */
6360 return TRUE;
6361
6362 /* Provide any missing _save* and _rest* functions. */
6363 htab->sfpr->size = 0;
6364 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6365 if (!sfpr_define (info, &funcs[i]))
6366 return FALSE;
6367
6368 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6369
6370 if (htab->sfpr->size == 0)
6371 htab->sfpr->flags |= SEC_EXCLUDE;
6372
6373 return TRUE;
6374 }
6375
6376 /* Adjust a symbol defined by a dynamic object and referenced by a
6377 regular object. The current definition is in some section of the
6378 dynamic object, but we're not including those sections. We have to
6379 change the definition to something the rest of the link can
6380 understand. */
6381
6382 static bfd_boolean
6383 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6384 struct elf_link_hash_entry *h)
6385 {
6386 struct ppc_link_hash_table *htab;
6387 asection *s;
6388
6389 htab = ppc_hash_table (info);
6390 if (htab == NULL)
6391 return FALSE;
6392
6393 /* Deal with function syms. */
6394 if (h->type == STT_FUNC
6395 || h->type == STT_GNU_IFUNC
6396 || h->needs_plt)
6397 {
6398 /* Clear procedure linkage table information for any symbol that
6399 won't need a .plt entry. */
6400 struct plt_entry *ent;
6401 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6402 if (ent->plt.refcount > 0)
6403 break;
6404 if (ent == NULL
6405 || (h->type != STT_GNU_IFUNC
6406 && (SYMBOL_CALLS_LOCAL (info, h)
6407 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6408 && h->root.type == bfd_link_hash_undefweak))))
6409 {
6410 h->plt.plist = NULL;
6411 h->needs_plt = 0;
6412 }
6413 }
6414 else
6415 h->plt.plist = NULL;
6416
6417 /* If this is a weak symbol, and there is a real definition, the
6418 processor independent code will have arranged for us to see the
6419 real definition first, and we can just use the same value. */
6420 if (h->u.weakdef != NULL)
6421 {
6422 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6423 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6424 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6425 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6426 if (ELIMINATE_COPY_RELOCS)
6427 h->non_got_ref = h->u.weakdef->non_got_ref;
6428 return TRUE;
6429 }
6430
6431 /* If we are creating a shared library, we must presume that the
6432 only references to the symbol are via the global offset table.
6433 For such cases we need not do anything here; the relocations will
6434 be handled correctly by relocate_section. */
6435 if (info->shared)
6436 return TRUE;
6437
6438 /* If there are no references to this symbol that do not use the
6439 GOT, we don't need to generate a copy reloc. */
6440 if (!h->non_got_ref)
6441 return TRUE;
6442
6443 /* Don't generate a copy reloc for symbols defined in the executable. */
6444 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6445 return TRUE;
6446
6447 if (ELIMINATE_COPY_RELOCS)
6448 {
6449 struct ppc_link_hash_entry * eh;
6450 struct ppc_dyn_relocs *p;
6451
6452 eh = (struct ppc_link_hash_entry *) h;
6453 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6454 {
6455 s = p->sec->output_section;
6456 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6457 break;
6458 }
6459
6460 /* If we didn't find any dynamic relocs in read-only sections, then
6461 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6462 if (p == NULL)
6463 {
6464 h->non_got_ref = 0;
6465 return TRUE;
6466 }
6467 }
6468
6469 if (h->plt.plist != NULL)
6470 {
6471 /* We should never get here, but unfortunately there are versions
6472 of gcc out there that improperly (for this ABI) put initialized
6473 function pointers, vtable refs and suchlike in read-only
6474 sections. Allow them to proceed, but warn that this might
6475 break at runtime. */
6476 (*_bfd_error_handler)
6477 (_("copy reloc against `%s' requires lazy plt linking; "
6478 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6479 h->root.root.string);
6480 }
6481
6482 /* This is a reference to a symbol defined by a dynamic object which
6483 is not a function. */
6484
6485 if (h->size == 0)
6486 {
6487 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6488 h->root.root.string);
6489 return TRUE;
6490 }
6491
6492 /* We must allocate the symbol in our .dynbss section, which will
6493 become part of the .bss section of the executable. There will be
6494 an entry for this symbol in the .dynsym section. The dynamic
6495 object will contain position independent code, so all references
6496 from the dynamic object to this symbol will go through the global
6497 offset table. The dynamic linker will use the .dynsym entry to
6498 determine the address it must put in the global offset table, so
6499 both the dynamic object and the regular object will refer to the
6500 same memory location for the variable. */
6501
6502 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6503 to copy the initial value out of the dynamic object and into the
6504 runtime process image. We need to remember the offset into the
6505 .rela.bss section we are going to use. */
6506 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6507 {
6508 htab->relbss->size += sizeof (Elf64_External_Rela);
6509 h->needs_copy = 1;
6510 }
6511
6512 s = htab->dynbss;
6513
6514 return _bfd_elf_adjust_dynamic_copy (h, s);
6515 }
6516
6517 /* If given a function descriptor symbol, hide both the function code
6518 sym and the descriptor. */
6519 static void
6520 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6521 struct elf_link_hash_entry *h,
6522 bfd_boolean force_local)
6523 {
6524 struct ppc_link_hash_entry *eh;
6525 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6526
6527 eh = (struct ppc_link_hash_entry *) h;
6528 if (eh->is_func_descriptor)
6529 {
6530 struct ppc_link_hash_entry *fh = eh->oh;
6531
6532 if (fh == NULL)
6533 {
6534 const char *p, *q;
6535 struct ppc_link_hash_table *htab;
6536 char save;
6537
6538 /* We aren't supposed to use alloca in BFD because on
6539 systems which do not have alloca the version in libiberty
6540 calls xmalloc, which might cause the program to crash
6541 when it runs out of memory. This function doesn't have a
6542 return status, so there's no way to gracefully return an
6543 error. So cheat. We know that string[-1] can be safely
6544 accessed; It's either a string in an ELF string table,
6545 or allocated in an objalloc structure. */
6546
6547 p = eh->elf.root.root.string - 1;
6548 save = *p;
6549 *(char *) p = '.';
6550 htab = ppc_hash_table (info);
6551 if (htab == NULL)
6552 return;
6553
6554 fh = (struct ppc_link_hash_entry *)
6555 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6556 *(char *) p = save;
6557
6558 /* Unfortunately, if it so happens that the string we were
6559 looking for was allocated immediately before this string,
6560 then we overwrote the string terminator. That's the only
6561 reason the lookup should fail. */
6562 if (fh == NULL)
6563 {
6564 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6565 while (q >= eh->elf.root.root.string && *q == *p)
6566 --q, --p;
6567 if (q < eh->elf.root.root.string && *p == '.')
6568 fh = (struct ppc_link_hash_entry *)
6569 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6570 }
6571 if (fh != NULL)
6572 {
6573 eh->oh = fh;
6574 fh->oh = eh;
6575 }
6576 }
6577 if (fh != NULL)
6578 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6579 }
6580 }
6581
6582 static bfd_boolean
6583 get_sym_h (struct elf_link_hash_entry **hp,
6584 Elf_Internal_Sym **symp,
6585 asection **symsecp,
6586 unsigned char **tls_maskp,
6587 Elf_Internal_Sym **locsymsp,
6588 unsigned long r_symndx,
6589 bfd *ibfd)
6590 {
6591 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6592
6593 if (r_symndx >= symtab_hdr->sh_info)
6594 {
6595 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6596 struct elf_link_hash_entry *h;
6597
6598 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6599 h = elf_follow_link (h);
6600
6601 if (hp != NULL)
6602 *hp = h;
6603
6604 if (symp != NULL)
6605 *symp = NULL;
6606
6607 if (symsecp != NULL)
6608 {
6609 asection *symsec = NULL;
6610 if (h->root.type == bfd_link_hash_defined
6611 || h->root.type == bfd_link_hash_defweak)
6612 symsec = h->root.u.def.section;
6613 *symsecp = symsec;
6614 }
6615
6616 if (tls_maskp != NULL)
6617 {
6618 struct ppc_link_hash_entry *eh;
6619
6620 eh = (struct ppc_link_hash_entry *) h;
6621 *tls_maskp = &eh->tls_mask;
6622 }
6623 }
6624 else
6625 {
6626 Elf_Internal_Sym *sym;
6627 Elf_Internal_Sym *locsyms = *locsymsp;
6628
6629 if (locsyms == NULL)
6630 {
6631 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6632 if (locsyms == NULL)
6633 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6634 symtab_hdr->sh_info,
6635 0, NULL, NULL, NULL);
6636 if (locsyms == NULL)
6637 return FALSE;
6638 *locsymsp = locsyms;
6639 }
6640 sym = locsyms + r_symndx;
6641
6642 if (hp != NULL)
6643 *hp = NULL;
6644
6645 if (symp != NULL)
6646 *symp = sym;
6647
6648 if (symsecp != NULL)
6649 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6650
6651 if (tls_maskp != NULL)
6652 {
6653 struct got_entry **lgot_ents;
6654 unsigned char *tls_mask;
6655
6656 tls_mask = NULL;
6657 lgot_ents = elf_local_got_ents (ibfd);
6658 if (lgot_ents != NULL)
6659 {
6660 struct plt_entry **local_plt = (struct plt_entry **)
6661 (lgot_ents + symtab_hdr->sh_info);
6662 unsigned char *lgot_masks = (unsigned char *)
6663 (local_plt + symtab_hdr->sh_info);
6664 tls_mask = &lgot_masks[r_symndx];
6665 }
6666 *tls_maskp = tls_mask;
6667 }
6668 }
6669 return TRUE;
6670 }
6671
6672 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6673 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6674 type suitable for optimization, and 1 otherwise. */
6675
6676 static int
6677 get_tls_mask (unsigned char **tls_maskp,
6678 unsigned long *toc_symndx,
6679 bfd_vma *toc_addend,
6680 Elf_Internal_Sym **locsymsp,
6681 const Elf_Internal_Rela *rel,
6682 bfd *ibfd)
6683 {
6684 unsigned long r_symndx;
6685 int next_r;
6686 struct elf_link_hash_entry *h;
6687 Elf_Internal_Sym *sym;
6688 asection *sec;
6689 bfd_vma off;
6690
6691 r_symndx = ELF64_R_SYM (rel->r_info);
6692 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6693 return 0;
6694
6695 if ((*tls_maskp != NULL && **tls_maskp != 0)
6696 || sec == NULL
6697 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6698 return 1;
6699
6700 /* Look inside a TOC section too. */
6701 if (h != NULL)
6702 {
6703 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6704 off = h->root.u.def.value;
6705 }
6706 else
6707 off = sym->st_value;
6708 off += rel->r_addend;
6709 BFD_ASSERT (off % 8 == 0);
6710 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6711 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6712 if (toc_symndx != NULL)
6713 *toc_symndx = r_symndx;
6714 if (toc_addend != NULL)
6715 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6716 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6717 return 0;
6718 if ((h == NULL || is_static_defined (h))
6719 && (next_r == -1 || next_r == -2))
6720 return 1 - next_r;
6721 return 1;
6722 }
6723
6724 /* Adjust all global syms defined in opd sections. In gcc generated
6725 code for the old ABI, these will already have been done. */
6726
6727 static bfd_boolean
6728 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6729 {
6730 struct ppc_link_hash_entry *eh;
6731 asection *sym_sec;
6732 struct _opd_sec_data *opd;
6733
6734 if (h->root.type == bfd_link_hash_indirect)
6735 return TRUE;
6736
6737 if (h->root.type == bfd_link_hash_warning)
6738 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6739
6740 if (h->root.type != bfd_link_hash_defined
6741 && h->root.type != bfd_link_hash_defweak)
6742 return TRUE;
6743
6744 eh = (struct ppc_link_hash_entry *) h;
6745 if (eh->adjust_done)
6746 return TRUE;
6747
6748 sym_sec = eh->elf.root.u.def.section;
6749 opd = get_opd_info (sym_sec);
6750 if (opd != NULL && opd->adjust != NULL)
6751 {
6752 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6753 if (adjust == -1)
6754 {
6755 /* This entry has been deleted. */
6756 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6757 if (dsec == NULL)
6758 {
6759 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6760 if (elf_discarded_section (dsec))
6761 {
6762 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6763 break;
6764 }
6765 }
6766 eh->elf.root.u.def.value = 0;
6767 eh->elf.root.u.def.section = dsec;
6768 }
6769 else
6770 eh->elf.root.u.def.value += adjust;
6771 eh->adjust_done = 1;
6772 }
6773 return TRUE;
6774 }
6775
6776 /* Handles decrementing dynamic reloc counts for the reloc specified by
6777 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6778 have already been determined. */
6779
6780 static bfd_boolean
6781 dec_dynrel_count (bfd_vma r_info,
6782 asection *sec,
6783 struct bfd_link_info *info,
6784 Elf_Internal_Sym **local_syms,
6785 struct elf_link_hash_entry *h,
6786 asection *sym_sec)
6787 {
6788 enum elf_ppc64_reloc_type r_type;
6789 struct ppc_dyn_relocs *p;
6790 struct ppc_dyn_relocs **pp;
6791
6792 /* Can this reloc be dynamic? This switch, and later tests here
6793 should be kept in sync with the code in check_relocs. */
6794 r_type = ELF64_R_TYPE (r_info);
6795 switch (r_type)
6796 {
6797 default:
6798 return TRUE;
6799
6800 case R_PPC64_TPREL16:
6801 case R_PPC64_TPREL16_LO:
6802 case R_PPC64_TPREL16_HI:
6803 case R_PPC64_TPREL16_HA:
6804 case R_PPC64_TPREL16_DS:
6805 case R_PPC64_TPREL16_LO_DS:
6806 case R_PPC64_TPREL16_HIGHER:
6807 case R_PPC64_TPREL16_HIGHERA:
6808 case R_PPC64_TPREL16_HIGHEST:
6809 case R_PPC64_TPREL16_HIGHESTA:
6810 if (!info->shared)
6811 return TRUE;
6812
6813 case R_PPC64_TPREL64:
6814 case R_PPC64_DTPMOD64:
6815 case R_PPC64_DTPREL64:
6816 case R_PPC64_ADDR64:
6817 case R_PPC64_REL30:
6818 case R_PPC64_REL32:
6819 case R_PPC64_REL64:
6820 case R_PPC64_ADDR14:
6821 case R_PPC64_ADDR14_BRNTAKEN:
6822 case R_PPC64_ADDR14_BRTAKEN:
6823 case R_PPC64_ADDR16:
6824 case R_PPC64_ADDR16_DS:
6825 case R_PPC64_ADDR16_HA:
6826 case R_PPC64_ADDR16_HI:
6827 case R_PPC64_ADDR16_HIGHER:
6828 case R_PPC64_ADDR16_HIGHERA:
6829 case R_PPC64_ADDR16_HIGHEST:
6830 case R_PPC64_ADDR16_HIGHESTA:
6831 case R_PPC64_ADDR16_LO:
6832 case R_PPC64_ADDR16_LO_DS:
6833 case R_PPC64_ADDR24:
6834 case R_PPC64_ADDR32:
6835 case R_PPC64_UADDR16:
6836 case R_PPC64_UADDR32:
6837 case R_PPC64_UADDR64:
6838 case R_PPC64_TOC:
6839 break;
6840 }
6841
6842 if (local_syms != NULL)
6843 {
6844 unsigned long r_symndx;
6845 Elf_Internal_Sym *sym;
6846 bfd *ibfd = sec->owner;
6847
6848 r_symndx = ELF64_R_SYM (r_info);
6849 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6850 return FALSE;
6851 }
6852
6853 if ((info->shared
6854 && (must_be_dyn_reloc (info, r_type)
6855 || (h != NULL
6856 && (!info->symbolic
6857 || h->root.type == bfd_link_hash_defweak
6858 || !h->def_regular))))
6859 || (ELIMINATE_COPY_RELOCS
6860 && !info->shared
6861 && h != NULL
6862 && (h->root.type == bfd_link_hash_defweak
6863 || !h->def_regular)))
6864 ;
6865 else
6866 return TRUE;
6867
6868 if (h != NULL)
6869 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6870 else
6871 {
6872 if (sym_sec != NULL)
6873 {
6874 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6875 pp = (struct ppc_dyn_relocs **) vpp;
6876 }
6877 else
6878 {
6879 void *vpp = &elf_section_data (sec)->local_dynrel;
6880 pp = (struct ppc_dyn_relocs **) vpp;
6881 }
6882
6883 /* elf_gc_sweep may have already removed all dyn relocs associated
6884 with local syms for a given section. Don't report a dynreloc
6885 miscount. */
6886 if (*pp == NULL)
6887 return TRUE;
6888 }
6889
6890 while ((p = *pp) != NULL)
6891 {
6892 if (p->sec == sec)
6893 {
6894 if (!must_be_dyn_reloc (info, r_type))
6895 p->pc_count -= 1;
6896 p->count -= 1;
6897 if (p->count == 0)
6898 *pp = p->next;
6899 return TRUE;
6900 }
6901 pp = &p->next;
6902 }
6903
6904 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6905 sec->owner, sec);
6906 bfd_set_error (bfd_error_bad_value);
6907 return FALSE;
6908 }
6909
6910 /* Remove unused Official Procedure Descriptor entries. Currently we
6911 only remove those associated with functions in discarded link-once
6912 sections, or weakly defined functions that have been overridden. It
6913 would be possible to remove many more entries for statically linked
6914 applications. */
6915
6916 bfd_boolean
6917 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6918 {
6919 bfd *ibfd;
6920 bfd_boolean some_edited = FALSE;
6921 asection *need_pad = NULL;
6922
6923 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6924 {
6925 asection *sec;
6926 Elf_Internal_Rela *relstart, *rel, *relend;
6927 Elf_Internal_Shdr *symtab_hdr;
6928 Elf_Internal_Sym *local_syms;
6929 struct elf_link_hash_entry **sym_hashes;
6930 bfd_vma offset;
6931 struct _opd_sec_data *opd;
6932 bfd_boolean need_edit, add_aux_fields;
6933 bfd_size_type cnt_16b = 0;
6934
6935 if (!is_ppc64_elf (ibfd))
6936 continue;
6937
6938 sec = bfd_get_section_by_name (ibfd, ".opd");
6939 if (sec == NULL || sec->size == 0)
6940 continue;
6941
6942 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6943 continue;
6944
6945 if (sec->output_section == bfd_abs_section_ptr)
6946 continue;
6947
6948 /* Look through the section relocs. */
6949 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6950 continue;
6951
6952 local_syms = NULL;
6953 symtab_hdr = &elf_symtab_hdr (ibfd);
6954 sym_hashes = elf_sym_hashes (ibfd);
6955
6956 /* Read the relocations. */
6957 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6958 info->keep_memory);
6959 if (relstart == NULL)
6960 return FALSE;
6961
6962 /* First run through the relocs to check they are sane, and to
6963 determine whether we need to edit this opd section. */
6964 need_edit = FALSE;
6965 need_pad = sec;
6966 offset = 0;
6967 relend = relstart + sec->reloc_count;
6968 for (rel = relstart; rel < relend; )
6969 {
6970 enum elf_ppc64_reloc_type r_type;
6971 unsigned long r_symndx;
6972 asection *sym_sec;
6973 struct elf_link_hash_entry *h;
6974 Elf_Internal_Sym *sym;
6975
6976 /* .opd contains a regular array of 16 or 24 byte entries. We're
6977 only interested in the reloc pointing to a function entry
6978 point. */
6979 if (rel->r_offset != offset
6980 || rel + 1 >= relend
6981 || (rel + 1)->r_offset != offset + 8)
6982 {
6983 /* If someone messes with .opd alignment then after a
6984 "ld -r" we might have padding in the middle of .opd.
6985 Also, there's nothing to prevent someone putting
6986 something silly in .opd with the assembler. No .opd
6987 optimization for them! */
6988 broken_opd:
6989 (*_bfd_error_handler)
6990 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6991 need_edit = FALSE;
6992 break;
6993 }
6994
6995 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6996 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6997 {
6998 (*_bfd_error_handler)
6999 (_("%B: unexpected reloc type %u in .opd section"),
7000 ibfd, r_type);
7001 need_edit = FALSE;
7002 break;
7003 }
7004
7005 r_symndx = ELF64_R_SYM (rel->r_info);
7006 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7007 r_symndx, ibfd))
7008 goto error_ret;
7009
7010 if (sym_sec == NULL || sym_sec->owner == NULL)
7011 {
7012 const char *sym_name;
7013 if (h != NULL)
7014 sym_name = h->root.root.string;
7015 else
7016 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7017 sym_sec);
7018
7019 (*_bfd_error_handler)
7020 (_("%B: undefined sym `%s' in .opd section"),
7021 ibfd, sym_name);
7022 need_edit = FALSE;
7023 break;
7024 }
7025
7026 /* opd entries are always for functions defined in the
7027 current input bfd. If the symbol isn't defined in the
7028 input bfd, then we won't be using the function in this
7029 bfd; It must be defined in a linkonce section in another
7030 bfd, or is weak. It's also possible that we are
7031 discarding the function due to a linker script /DISCARD/,
7032 which we test for via the output_section. */
7033 if (sym_sec->owner != ibfd
7034 || sym_sec->output_section == bfd_abs_section_ptr)
7035 need_edit = TRUE;
7036
7037 rel += 2;
7038 if (rel == relend
7039 || (rel + 1 == relend && rel->r_offset == offset + 16))
7040 {
7041 if (sec->size == offset + 24)
7042 {
7043 need_pad = NULL;
7044 break;
7045 }
7046 if (rel == relend && sec->size == offset + 16)
7047 {
7048 cnt_16b++;
7049 break;
7050 }
7051 goto broken_opd;
7052 }
7053
7054 if (rel->r_offset == offset + 24)
7055 offset += 24;
7056 else if (rel->r_offset != offset + 16)
7057 goto broken_opd;
7058 else if (rel + 1 < relend
7059 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7060 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7061 {
7062 offset += 16;
7063 cnt_16b++;
7064 }
7065 else if (rel + 2 < relend
7066 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7067 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7068 {
7069 offset += 24;
7070 rel += 1;
7071 }
7072 else
7073 goto broken_opd;
7074 }
7075
7076 add_aux_fields = non_overlapping && cnt_16b > 0;
7077
7078 if (need_edit || add_aux_fields)
7079 {
7080 Elf_Internal_Rela *write_rel;
7081 bfd_byte *rptr, *wptr;
7082 bfd_byte *new_contents;
7083 bfd_boolean skip;
7084 long opd_ent_size;
7085 bfd_size_type amt;
7086
7087 new_contents = NULL;
7088 amt = sec->size * sizeof (long) / 8;
7089 opd = &ppc64_elf_section_data (sec)->u.opd;
7090 opd->adjust = bfd_zalloc (sec->owner, amt);
7091 if (opd->adjust == NULL)
7092 return FALSE;
7093 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7094
7095 /* This seems a waste of time as input .opd sections are all
7096 zeros as generated by gcc, but I suppose there's no reason
7097 this will always be so. We might start putting something in
7098 the third word of .opd entries. */
7099 if ((sec->flags & SEC_IN_MEMORY) == 0)
7100 {
7101 bfd_byte *loc;
7102 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7103 {
7104 if (loc != NULL)
7105 free (loc);
7106 error_ret:
7107 if (local_syms != NULL
7108 && symtab_hdr->contents != (unsigned char *) local_syms)
7109 free (local_syms);
7110 if (elf_section_data (sec)->relocs != relstart)
7111 free (relstart);
7112 return FALSE;
7113 }
7114 sec->contents = loc;
7115 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7116 }
7117
7118 elf_section_data (sec)->relocs = relstart;
7119
7120 new_contents = sec->contents;
7121 if (add_aux_fields)
7122 {
7123 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7124 if (new_contents == NULL)
7125 return FALSE;
7126 need_pad = FALSE;
7127 }
7128 wptr = new_contents;
7129 rptr = sec->contents;
7130
7131 write_rel = relstart;
7132 skip = FALSE;
7133 offset = 0;
7134 opd_ent_size = 0;
7135 for (rel = relstart; rel < relend; rel++)
7136 {
7137 unsigned long r_symndx;
7138 asection *sym_sec;
7139 struct elf_link_hash_entry *h;
7140 Elf_Internal_Sym *sym;
7141
7142 r_symndx = ELF64_R_SYM (rel->r_info);
7143 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7144 r_symndx, ibfd))
7145 goto error_ret;
7146
7147 if (rel->r_offset == offset)
7148 {
7149 struct ppc_link_hash_entry *fdh = NULL;
7150
7151 /* See if the .opd entry is full 24 byte or
7152 16 byte (with fd_aux entry overlapped with next
7153 fd_func). */
7154 opd_ent_size = 24;
7155 if ((rel + 2 == relend && sec->size == offset + 16)
7156 || (rel + 3 < relend
7157 && rel[2].r_offset == offset + 16
7158 && rel[3].r_offset == offset + 24
7159 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7160 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7161 opd_ent_size = 16;
7162
7163 if (h != NULL
7164 && h->root.root.string[0] == '.')
7165 {
7166 struct ppc_link_hash_table *htab;
7167
7168 htab = ppc_hash_table (info);
7169 if (htab != NULL)
7170 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7171 htab);
7172 if (fdh != NULL
7173 && fdh->elf.root.type != bfd_link_hash_defined
7174 && fdh->elf.root.type != bfd_link_hash_defweak)
7175 fdh = NULL;
7176 }
7177
7178 skip = (sym_sec->owner != ibfd
7179 || sym_sec->output_section == bfd_abs_section_ptr);
7180 if (skip)
7181 {
7182 if (fdh != NULL && sym_sec->owner == ibfd)
7183 {
7184 /* Arrange for the function descriptor sym
7185 to be dropped. */
7186 fdh->elf.root.u.def.value = 0;
7187 fdh->elf.root.u.def.section = sym_sec;
7188 }
7189 opd->adjust[rel->r_offset / 8] = -1;
7190 }
7191 else
7192 {
7193 /* We'll be keeping this opd entry. */
7194
7195 if (fdh != NULL)
7196 {
7197 /* Redefine the function descriptor symbol to
7198 this location in the opd section. It is
7199 necessary to update the value here rather
7200 than using an array of adjustments as we do
7201 for local symbols, because various places
7202 in the generic ELF code use the value
7203 stored in u.def.value. */
7204 fdh->elf.root.u.def.value = wptr - new_contents;
7205 fdh->adjust_done = 1;
7206 }
7207
7208 /* Local syms are a bit tricky. We could
7209 tweak them as they can be cached, but
7210 we'd need to look through the local syms
7211 for the function descriptor sym which we
7212 don't have at the moment. So keep an
7213 array of adjustments. */
7214 opd->adjust[rel->r_offset / 8]
7215 = (wptr - new_contents) - (rptr - sec->contents);
7216
7217 if (wptr != rptr)
7218 memcpy (wptr, rptr, opd_ent_size);
7219 wptr += opd_ent_size;
7220 if (add_aux_fields && opd_ent_size == 16)
7221 {
7222 memset (wptr, '\0', 8);
7223 wptr += 8;
7224 }
7225 }
7226 rptr += opd_ent_size;
7227 offset += opd_ent_size;
7228 }
7229
7230 if (skip)
7231 {
7232 if (!NO_OPD_RELOCS
7233 && !info->relocatable
7234 && !dec_dynrel_count (rel->r_info, sec, info,
7235 NULL, h, sym_sec))
7236 goto error_ret;
7237 }
7238 else
7239 {
7240 /* We need to adjust any reloc offsets to point to the
7241 new opd entries. While we're at it, we may as well
7242 remove redundant relocs. */
7243 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7244 if (write_rel != rel)
7245 memcpy (write_rel, rel, sizeof (*rel));
7246 ++write_rel;
7247 }
7248 }
7249
7250 sec->size = wptr - new_contents;
7251 sec->reloc_count = write_rel - relstart;
7252 if (add_aux_fields)
7253 {
7254 free (sec->contents);
7255 sec->contents = new_contents;
7256 }
7257
7258 /* Fudge the header size too, as this is used later in
7259 elf_bfd_final_link if we are emitting relocs. */
7260 elf_section_data (sec)->rel_hdr.sh_size
7261 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7262 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7263 some_edited = TRUE;
7264 }
7265 else if (elf_section_data (sec)->relocs != relstart)
7266 free (relstart);
7267
7268 if (local_syms != NULL
7269 && symtab_hdr->contents != (unsigned char *) local_syms)
7270 {
7271 if (!info->keep_memory)
7272 free (local_syms);
7273 else
7274 symtab_hdr->contents = (unsigned char *) local_syms;
7275 }
7276 }
7277
7278 if (some_edited)
7279 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7280
7281 /* If we are doing a final link and the last .opd entry is just 16 byte
7282 long, add a 8 byte padding after it. */
7283 if (need_pad != NULL && !info->relocatable)
7284 {
7285 bfd_byte *p;
7286
7287 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7288 {
7289 BFD_ASSERT (need_pad->size > 0);
7290
7291 p = bfd_malloc (need_pad->size + 8);
7292 if (p == NULL)
7293 return FALSE;
7294
7295 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7296 p, 0, need_pad->size))
7297 return FALSE;
7298
7299 need_pad->contents = p;
7300 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7301 }
7302 else
7303 {
7304 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7305 if (p == NULL)
7306 return FALSE;
7307
7308 need_pad->contents = p;
7309 }
7310
7311 memset (need_pad->contents + need_pad->size, 0, 8);
7312 need_pad->size += 8;
7313 }
7314
7315 return TRUE;
7316 }
7317
7318 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7319
7320 asection *
7321 ppc64_elf_tls_setup (struct bfd_link_info *info,
7322 int no_tls_get_addr_opt,
7323 int *no_multi_toc)
7324 {
7325 struct ppc_link_hash_table *htab;
7326
7327 htab = ppc_hash_table (info);
7328 if (htab == NULL)
7329 return NULL;
7330
7331 if (*no_multi_toc)
7332 htab->do_multi_toc = 0;
7333 else if (!htab->do_multi_toc)
7334 *no_multi_toc = 1;
7335
7336 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7337 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7338 FALSE, FALSE, TRUE));
7339 /* Move dynamic linking info to the function descriptor sym. */
7340 if (htab->tls_get_addr != NULL)
7341 func_desc_adjust (&htab->tls_get_addr->elf, info);
7342 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7343 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7344 FALSE, FALSE, TRUE));
7345 if (!no_tls_get_addr_opt)
7346 {
7347 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7348
7349 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7350 FALSE, FALSE, TRUE);
7351 if (opt != NULL)
7352 func_desc_adjust (opt, info);
7353 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7354 FALSE, FALSE, TRUE);
7355 if (opt_fd != NULL
7356 && (opt_fd->root.type == bfd_link_hash_defined
7357 || opt_fd->root.type == bfd_link_hash_defweak))
7358 {
7359 /* If glibc supports an optimized __tls_get_addr call stub,
7360 signalled by the presence of __tls_get_addr_opt, and we'll
7361 be calling __tls_get_addr via a plt call stub, then
7362 make __tls_get_addr point to __tls_get_addr_opt. */
7363 tga_fd = &htab->tls_get_addr_fd->elf;
7364 if (htab->elf.dynamic_sections_created
7365 && tga_fd != NULL
7366 && (tga_fd->type == STT_FUNC
7367 || tga_fd->needs_plt)
7368 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7369 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7370 && tga_fd->root.type == bfd_link_hash_undefweak)))
7371 {
7372 struct plt_entry *ent;
7373
7374 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7375 if (ent->plt.refcount > 0)
7376 break;
7377 if (ent != NULL)
7378 {
7379 tga_fd->root.type = bfd_link_hash_indirect;
7380 tga_fd->root.u.i.link = &opt_fd->root;
7381 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7382 if (opt_fd->dynindx != -1)
7383 {
7384 /* Use __tls_get_addr_opt in dynamic relocations. */
7385 opt_fd->dynindx = -1;
7386 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7387 opt_fd->dynstr_index);
7388 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7389 return NULL;
7390 }
7391 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7392 tga = &htab->tls_get_addr->elf;
7393 if (opt != NULL && tga != NULL)
7394 {
7395 tga->root.type = bfd_link_hash_indirect;
7396 tga->root.u.i.link = &opt->root;
7397 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7398 _bfd_elf_link_hash_hide_symbol (info, opt,
7399 tga->forced_local);
7400 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7401 }
7402 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7403 htab->tls_get_addr_fd->is_func_descriptor = 1;
7404 if (htab->tls_get_addr != NULL)
7405 {
7406 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7407 htab->tls_get_addr->is_func = 1;
7408 }
7409 }
7410 }
7411 }
7412 else
7413 no_tls_get_addr_opt = TRUE;
7414 }
7415 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7416 return _bfd_elf_tls_setup (info->output_bfd, info);
7417 }
7418
7419 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7420 HASH1 or HASH2. */
7421
7422 static bfd_boolean
7423 branch_reloc_hash_match (const bfd *ibfd,
7424 const Elf_Internal_Rela *rel,
7425 const struct ppc_link_hash_entry *hash1,
7426 const struct ppc_link_hash_entry *hash2)
7427 {
7428 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7429 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7430 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7431
7432 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7433 {
7434 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7435 struct elf_link_hash_entry *h;
7436
7437 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7438 h = elf_follow_link (h);
7439 if (h == &hash1->elf || h == &hash2->elf)
7440 return TRUE;
7441 }
7442 return FALSE;
7443 }
7444
7445 /* Run through all the TLS relocs looking for optimization
7446 opportunities. The linker has been hacked (see ppc64elf.em) to do
7447 a preliminary section layout so that we know the TLS segment
7448 offsets. We can't optimize earlier because some optimizations need
7449 to know the tp offset, and we need to optimize before allocating
7450 dynamic relocations. */
7451
7452 bfd_boolean
7453 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7454 {
7455 bfd *ibfd;
7456 asection *sec;
7457 struct ppc_link_hash_table *htab;
7458 int pass;
7459
7460 if (info->relocatable || !info->executable)
7461 return TRUE;
7462
7463 htab = ppc_hash_table (info);
7464 if (htab == NULL)
7465 return FALSE;
7466
7467 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7468 {
7469 Elf_Internal_Sym *locsyms = NULL;
7470 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7471 unsigned char *toc_ref = NULL;
7472
7473 /* Look at all the sections for this file. Make two passes over
7474 the relocs. On the first pass, mark toc entries involved
7475 with tls relocs, and check that tls relocs involved in
7476 setting up a tls_get_addr call are indeed followed by such a
7477 call. If they are not, exclude them from the optimizations
7478 done on the second pass. */
7479 for (pass = 0; pass < 2; ++pass)
7480 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7481 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7482 {
7483 Elf_Internal_Rela *relstart, *rel, *relend;
7484
7485 /* Read the relocations. */
7486 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7487 info->keep_memory);
7488 if (relstart == NULL)
7489 return FALSE;
7490
7491 relend = relstart + sec->reloc_count;
7492 for (rel = relstart; rel < relend; rel++)
7493 {
7494 enum elf_ppc64_reloc_type r_type;
7495 unsigned long r_symndx;
7496 struct elf_link_hash_entry *h;
7497 Elf_Internal_Sym *sym;
7498 asection *sym_sec;
7499 unsigned char *tls_mask;
7500 unsigned char tls_set, tls_clear, tls_type = 0;
7501 bfd_vma value;
7502 bfd_boolean ok_tprel, is_local;
7503 long toc_ref_index = 0;
7504 int expecting_tls_get_addr = 0;
7505
7506 r_symndx = ELF64_R_SYM (rel->r_info);
7507 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7508 r_symndx, ibfd))
7509 {
7510 err_free_rel:
7511 if (elf_section_data (sec)->relocs != relstart)
7512 free (relstart);
7513 if (toc_ref != NULL)
7514 free (toc_ref);
7515 if (locsyms != NULL
7516 && (elf_symtab_hdr (ibfd).contents
7517 != (unsigned char *) locsyms))
7518 free (locsyms);
7519 return FALSE;
7520 }
7521
7522 if (h != NULL)
7523 {
7524 if (h->root.type == bfd_link_hash_defined
7525 || h->root.type == bfd_link_hash_defweak)
7526 value = h->root.u.def.value;
7527 else if (h->root.type == bfd_link_hash_undefweak)
7528 value = 0;
7529 else
7530 continue;
7531 }
7532 else
7533 /* Symbols referenced by TLS relocs must be of type
7534 STT_TLS. So no need for .opd local sym adjust. */
7535 value = sym->st_value;
7536
7537 ok_tprel = FALSE;
7538 is_local = FALSE;
7539 if (h == NULL
7540 || !h->def_dynamic)
7541 {
7542 is_local = TRUE;
7543 if (h != NULL
7544 && h->root.type == bfd_link_hash_undefweak)
7545 ok_tprel = TRUE;
7546 else
7547 {
7548 value += sym_sec->output_offset;
7549 value += sym_sec->output_section->vma;
7550 value -= htab->elf.tls_sec->vma;
7551 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7552 < (bfd_vma) 1 << 32);
7553 }
7554 }
7555
7556 r_type = ELF64_R_TYPE (rel->r_info);
7557 switch (r_type)
7558 {
7559 case R_PPC64_GOT_TLSLD16:
7560 case R_PPC64_GOT_TLSLD16_LO:
7561 expecting_tls_get_addr = 1;
7562 /* Fall thru */
7563
7564 case R_PPC64_GOT_TLSLD16_HI:
7565 case R_PPC64_GOT_TLSLD16_HA:
7566 /* These relocs should never be against a symbol
7567 defined in a shared lib. Leave them alone if
7568 that turns out to be the case. */
7569 if (!is_local)
7570 continue;
7571
7572 /* LD -> LE */
7573 tls_set = 0;
7574 tls_clear = TLS_LD;
7575 tls_type = TLS_TLS | TLS_LD;
7576 break;
7577
7578 case R_PPC64_GOT_TLSGD16:
7579 case R_PPC64_GOT_TLSGD16_LO:
7580 expecting_tls_get_addr = 1;
7581 /* Fall thru */
7582
7583 case R_PPC64_GOT_TLSGD16_HI:
7584 case R_PPC64_GOT_TLSGD16_HA:
7585 if (ok_tprel)
7586 /* GD -> LE */
7587 tls_set = 0;
7588 else
7589 /* GD -> IE */
7590 tls_set = TLS_TLS | TLS_TPRELGD;
7591 tls_clear = TLS_GD;
7592 tls_type = TLS_TLS | TLS_GD;
7593 break;
7594
7595 case R_PPC64_GOT_TPREL16_DS:
7596 case R_PPC64_GOT_TPREL16_LO_DS:
7597 case R_PPC64_GOT_TPREL16_HI:
7598 case R_PPC64_GOT_TPREL16_HA:
7599 if (ok_tprel)
7600 {
7601 /* IE -> LE */
7602 tls_set = 0;
7603 tls_clear = TLS_TPREL;
7604 tls_type = TLS_TLS | TLS_TPREL;
7605 break;
7606 }
7607 continue;
7608
7609 case R_PPC64_TOC16:
7610 case R_PPC64_TOC16_LO:
7611 case R_PPC64_TLS:
7612 case R_PPC64_TLSGD:
7613 case R_PPC64_TLSLD:
7614 if (sym_sec == NULL || sym_sec != toc)
7615 continue;
7616
7617 /* Mark this toc entry as referenced by a TLS
7618 code sequence. We can do that now in the
7619 case of R_PPC64_TLS, and after checking for
7620 tls_get_addr for the TOC16 relocs. */
7621 if (toc_ref == NULL)
7622 {
7623 toc_ref = bfd_zmalloc (toc->size / 8);
7624 if (toc_ref == NULL)
7625 goto err_free_rel;
7626 }
7627 if (h != NULL)
7628 value = h->root.u.def.value;
7629 else
7630 value = sym->st_value;
7631 value += rel->r_addend;
7632 BFD_ASSERT (value < toc->size && value % 8 == 0);
7633 toc_ref_index = value / 8;
7634 if (r_type == R_PPC64_TLS
7635 || r_type == R_PPC64_TLSGD
7636 || r_type == R_PPC64_TLSLD)
7637 {
7638 toc_ref[toc_ref_index] = 1;
7639 continue;
7640 }
7641
7642 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7643 continue;
7644
7645 tls_set = 0;
7646 tls_clear = 0;
7647 expecting_tls_get_addr = 2;
7648 break;
7649
7650 case R_PPC64_TPREL64:
7651 if (pass == 0
7652 || sec != toc
7653 || toc_ref == NULL
7654 || !toc_ref[rel->r_offset / 8])
7655 continue;
7656 if (ok_tprel)
7657 {
7658 /* IE -> LE */
7659 tls_set = TLS_EXPLICIT;
7660 tls_clear = TLS_TPREL;
7661 break;
7662 }
7663 continue;
7664
7665 case R_PPC64_DTPMOD64:
7666 if (pass == 0
7667 || sec != toc
7668 || toc_ref == NULL
7669 || !toc_ref[rel->r_offset / 8])
7670 continue;
7671 if (rel + 1 < relend
7672 && (rel[1].r_info
7673 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7674 && rel[1].r_offset == rel->r_offset + 8)
7675 {
7676 if (ok_tprel)
7677 /* GD -> LE */
7678 tls_set = TLS_EXPLICIT | TLS_GD;
7679 else
7680 /* GD -> IE */
7681 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7682 tls_clear = TLS_GD;
7683 }
7684 else
7685 {
7686 if (!is_local)
7687 continue;
7688
7689 /* LD -> LE */
7690 tls_set = TLS_EXPLICIT;
7691 tls_clear = TLS_LD;
7692 }
7693 break;
7694
7695 default:
7696 continue;
7697 }
7698
7699 if (pass == 0)
7700 {
7701 if (!expecting_tls_get_addr
7702 || !sec->has_tls_get_addr_call)
7703 continue;
7704
7705 if (rel + 1 < relend
7706 && branch_reloc_hash_match (ibfd, rel + 1,
7707 htab->tls_get_addr,
7708 htab->tls_get_addr_fd))
7709 {
7710 if (expecting_tls_get_addr == 2)
7711 {
7712 /* Check for toc tls entries. */
7713 unsigned char *toc_tls;
7714 int retval;
7715
7716 retval = get_tls_mask (&toc_tls, NULL, NULL,
7717 &locsyms,
7718 rel, ibfd);
7719 if (retval == 0)
7720 goto err_free_rel;
7721 if (retval > 1 && toc_tls != NULL)
7722 toc_ref[toc_ref_index] = 1;
7723 }
7724 continue;
7725 }
7726
7727 if (expecting_tls_get_addr != 1)
7728 continue;
7729
7730 /* Uh oh, we didn't find the expected call. We
7731 could just mark this symbol to exclude it
7732 from tls optimization but it's safer to skip
7733 the entire section. */
7734 sec->has_tls_reloc = 0;
7735 break;
7736 }
7737
7738 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7739 {
7740 struct plt_entry *ent;
7741 for (ent = htab->tls_get_addr->elf.plt.plist;
7742 ent != NULL;
7743 ent = ent->next)
7744 if (ent->addend == 0)
7745 {
7746 if (ent->plt.refcount > 0)
7747 {
7748 ent->plt.refcount -= 1;
7749 expecting_tls_get_addr = 0;
7750 }
7751 break;
7752 }
7753 }
7754
7755 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7756 {
7757 struct plt_entry *ent;
7758 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7759 ent != NULL;
7760 ent = ent->next)
7761 if (ent->addend == 0)
7762 {
7763 if (ent->plt.refcount > 0)
7764 ent->plt.refcount -= 1;
7765 break;
7766 }
7767 }
7768
7769 if (tls_clear == 0)
7770 continue;
7771
7772 if ((tls_set & TLS_EXPLICIT) == 0)
7773 {
7774 struct got_entry *ent;
7775
7776 /* Adjust got entry for this reloc. */
7777 if (h != NULL)
7778 ent = h->got.glist;
7779 else
7780 ent = elf_local_got_ents (ibfd)[r_symndx];
7781
7782 for (; ent != NULL; ent = ent->next)
7783 if (ent->addend == rel->r_addend
7784 && ent->owner == ibfd
7785 && ent->tls_type == tls_type)
7786 break;
7787 if (ent == NULL)
7788 abort ();
7789
7790 if (tls_set == 0)
7791 {
7792 /* We managed to get rid of a got entry. */
7793 if (ent->got.refcount > 0)
7794 ent->got.refcount -= 1;
7795 }
7796 }
7797 else
7798 {
7799 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7800 we'll lose one or two dyn relocs. */
7801 if (!dec_dynrel_count (rel->r_info, sec, info,
7802 NULL, h, sym_sec))
7803 return FALSE;
7804
7805 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7806 {
7807 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7808 NULL, h, sym_sec))
7809 return FALSE;
7810 }
7811 }
7812
7813 *tls_mask |= tls_set;
7814 *tls_mask &= ~tls_clear;
7815 }
7816
7817 if (elf_section_data (sec)->relocs != relstart)
7818 free (relstart);
7819 }
7820
7821 if (toc_ref != NULL)
7822 free (toc_ref);
7823
7824 if (locsyms != NULL
7825 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7826 {
7827 if (!info->keep_memory)
7828 free (locsyms);
7829 else
7830 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7831 }
7832 }
7833 return TRUE;
7834 }
7835
7836 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7837 the values of any global symbols in a toc section that has been
7838 edited. Globals in toc sections should be a rarity, so this function
7839 sets a flag if any are found in toc sections other than the one just
7840 edited, so that futher hash table traversals can be avoided. */
7841
7842 struct adjust_toc_info
7843 {
7844 asection *toc;
7845 unsigned long *skip;
7846 bfd_boolean global_toc_syms;
7847 };
7848
7849 static bfd_boolean
7850 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7851 {
7852 struct ppc_link_hash_entry *eh;
7853 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7854 unsigned long i;
7855
7856 if (h->root.type == bfd_link_hash_indirect)
7857 return TRUE;
7858
7859 if (h->root.type == bfd_link_hash_warning)
7860 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7861
7862 if (h->root.type != bfd_link_hash_defined
7863 && h->root.type != bfd_link_hash_defweak)
7864 return TRUE;
7865
7866 eh = (struct ppc_link_hash_entry *) h;
7867 if (eh->adjust_done)
7868 return TRUE;
7869
7870 if (eh->elf.root.u.def.section == toc_inf->toc)
7871 {
7872 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7873 i = toc_inf->toc->rawsize >> 3;
7874 else
7875 i = eh->elf.root.u.def.value >> 3;
7876
7877 if (toc_inf->skip[i] == (unsigned long) -1)
7878 {
7879 (*_bfd_error_handler)
7880 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7881 do
7882 ++i;
7883 while (toc_inf->skip[i] == (unsigned long) -1);
7884 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7885 }
7886
7887 eh->elf.root.u.def.value -= toc_inf->skip[i];
7888 eh->adjust_done = 1;
7889 }
7890 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7891 toc_inf->global_toc_syms = TRUE;
7892
7893 return TRUE;
7894 }
7895
7896 /* Examine all relocs referencing .toc sections in order to remove
7897 unused .toc entries. */
7898
7899 bfd_boolean
7900 ppc64_elf_edit_toc (struct bfd_link_info *info)
7901 {
7902 bfd *ibfd;
7903 struct adjust_toc_info toc_inf;
7904 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7905
7906 htab->do_toc_opt = 1;
7907 toc_inf.global_toc_syms = TRUE;
7908 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7909 {
7910 asection *toc, *sec;
7911 Elf_Internal_Shdr *symtab_hdr;
7912 Elf_Internal_Sym *local_syms;
7913 struct elf_link_hash_entry **sym_hashes;
7914 Elf_Internal_Rela *relstart, *rel;
7915 unsigned long *skip, *drop;
7916 unsigned char *used;
7917 unsigned char *keep, last, some_unused;
7918
7919 if (!is_ppc64_elf (ibfd))
7920 continue;
7921
7922 toc = bfd_get_section_by_name (ibfd, ".toc");
7923 if (toc == NULL
7924 || toc->size == 0
7925 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7926 || elf_discarded_section (toc))
7927 continue;
7928
7929 local_syms = NULL;
7930 symtab_hdr = &elf_symtab_hdr (ibfd);
7931 sym_hashes = elf_sym_hashes (ibfd);
7932
7933 /* Look at sections dropped from the final link. */
7934 skip = NULL;
7935 relstart = NULL;
7936 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7937 {
7938 if (sec->reloc_count == 0
7939 || !elf_discarded_section (sec)
7940 || get_opd_info (sec)
7941 || (sec->flags & SEC_ALLOC) == 0
7942 || (sec->flags & SEC_DEBUGGING) != 0)
7943 continue;
7944
7945 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7946 if (relstart == NULL)
7947 goto error_ret;
7948
7949 /* Run through the relocs to see which toc entries might be
7950 unused. */
7951 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7952 {
7953 enum elf_ppc64_reloc_type r_type;
7954 unsigned long r_symndx;
7955 asection *sym_sec;
7956 struct elf_link_hash_entry *h;
7957 Elf_Internal_Sym *sym;
7958 bfd_vma val;
7959
7960 r_type = ELF64_R_TYPE (rel->r_info);
7961 switch (r_type)
7962 {
7963 default:
7964 continue;
7965
7966 case R_PPC64_TOC16:
7967 case R_PPC64_TOC16_LO:
7968 case R_PPC64_TOC16_HI:
7969 case R_PPC64_TOC16_HA:
7970 case R_PPC64_TOC16_DS:
7971 case R_PPC64_TOC16_LO_DS:
7972 break;
7973 }
7974
7975 r_symndx = ELF64_R_SYM (rel->r_info);
7976 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7977 r_symndx, ibfd))
7978 goto error_ret;
7979
7980 if (sym_sec != toc)
7981 continue;
7982
7983 if (h != NULL)
7984 val = h->root.u.def.value;
7985 else
7986 val = sym->st_value;
7987 val += rel->r_addend;
7988
7989 if (val >= toc->size)
7990 continue;
7991
7992 /* Anything in the toc ought to be aligned to 8 bytes.
7993 If not, don't mark as unused. */
7994 if (val & 7)
7995 continue;
7996
7997 if (skip == NULL)
7998 {
7999 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8000 if (skip == NULL)
8001 goto error_ret;
8002 }
8003
8004 skip[val >> 3] = 1;
8005 }
8006
8007 if (elf_section_data (sec)->relocs != relstart)
8008 free (relstart);
8009 }
8010
8011 if (skip == NULL)
8012 continue;
8013
8014 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8015 if (used == NULL)
8016 {
8017 error_ret:
8018 if (local_syms != NULL
8019 && symtab_hdr->contents != (unsigned char *) local_syms)
8020 free (local_syms);
8021 if (sec != NULL
8022 && relstart != NULL
8023 && elf_section_data (sec)->relocs != relstart)
8024 free (relstart);
8025 if (skip != NULL)
8026 free (skip);
8027 return FALSE;
8028 }
8029
8030 /* Now check all kept sections that might reference the toc.
8031 Check the toc itself last. */
8032 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8033 : ibfd->sections);
8034 sec != NULL;
8035 sec = (sec == toc ? NULL
8036 : sec->next == NULL ? toc
8037 : sec->next == toc && toc->next ? toc->next
8038 : sec->next))
8039 {
8040 int repeat;
8041
8042 if (sec->reloc_count == 0
8043 || elf_discarded_section (sec)
8044 || get_opd_info (sec)
8045 || (sec->flags & SEC_ALLOC) == 0
8046 || (sec->flags & SEC_DEBUGGING) != 0)
8047 continue;
8048
8049 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8050 info->keep_memory);
8051 if (relstart == NULL)
8052 goto error_ret;
8053
8054 /* Mark toc entries referenced as used. */
8055 repeat = 0;
8056 do
8057 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8058 {
8059 enum elf_ppc64_reloc_type r_type;
8060 unsigned long r_symndx;
8061 asection *sym_sec;
8062 struct elf_link_hash_entry *h;
8063 Elf_Internal_Sym *sym;
8064 bfd_vma val;
8065
8066 r_type = ELF64_R_TYPE (rel->r_info);
8067 switch (r_type)
8068 {
8069 case R_PPC64_TOC16:
8070 case R_PPC64_TOC16_LO:
8071 case R_PPC64_TOC16_HI:
8072 case R_PPC64_TOC16_HA:
8073 case R_PPC64_TOC16_DS:
8074 case R_PPC64_TOC16_LO_DS:
8075 /* In case we're taking addresses of toc entries. */
8076 case R_PPC64_ADDR64:
8077 break;
8078
8079 default:
8080 continue;
8081 }
8082
8083 r_symndx = ELF64_R_SYM (rel->r_info);
8084 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8085 r_symndx, ibfd))
8086 {
8087 free (used);
8088 goto error_ret;
8089 }
8090
8091 if (sym_sec != toc)
8092 continue;
8093
8094 if (h != NULL)
8095 val = h->root.u.def.value;
8096 else
8097 val = sym->st_value;
8098 val += rel->r_addend;
8099
8100 if (val >= toc->size)
8101 continue;
8102
8103 /* For the toc section, we only mark as used if
8104 this entry itself isn't unused. */
8105 if (sec == toc
8106 && !used[val >> 3]
8107 && (used[rel->r_offset >> 3]
8108 || !skip[rel->r_offset >> 3]))
8109 /* Do all the relocs again, to catch reference
8110 chains. */
8111 repeat = 1;
8112
8113 used[val >> 3] = 1;
8114 }
8115 while (repeat);
8116
8117 if (elf_section_data (sec)->relocs != relstart)
8118 free (relstart);
8119 }
8120
8121 /* Merge the used and skip arrays. Assume that TOC
8122 doublewords not appearing as either used or unused belong
8123 to to an entry more than one doubleword in size. */
8124 for (drop = skip, keep = used, last = 0, some_unused = 0;
8125 drop < skip + (toc->size + 7) / 8;
8126 ++drop, ++keep)
8127 {
8128 if (*keep)
8129 {
8130 *drop = 0;
8131 last = 0;
8132 }
8133 else if (*drop)
8134 {
8135 some_unused = 1;
8136 last = 1;
8137 }
8138 else
8139 *drop = last;
8140 }
8141
8142 free (used);
8143
8144 if (some_unused)
8145 {
8146 bfd_byte *contents, *src;
8147 unsigned long off;
8148
8149 /* Shuffle the toc contents, and at the same time convert the
8150 skip array from booleans into offsets. */
8151 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8152 goto error_ret;
8153
8154 elf_section_data (toc)->this_hdr.contents = contents;
8155
8156 for (src = contents, off = 0, drop = skip;
8157 src < contents + toc->size;
8158 src += 8, ++drop)
8159 {
8160 if (*drop)
8161 {
8162 *drop = (unsigned long) -1;
8163 off += 8;
8164 }
8165 else if (off != 0)
8166 {
8167 *drop = off;
8168 memcpy (src - off, src, 8);
8169 }
8170 }
8171 *drop = off;
8172 toc->rawsize = toc->size;
8173 toc->size = src - contents - off;
8174
8175 /* Adjust addends for relocs against the toc section sym. */
8176 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8177 {
8178 if (sec->reloc_count == 0
8179 || elf_discarded_section (sec))
8180 continue;
8181
8182 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8183 info->keep_memory);
8184 if (relstart == NULL)
8185 goto error_ret;
8186
8187 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8188 {
8189 enum elf_ppc64_reloc_type r_type;
8190 unsigned long r_symndx;
8191 asection *sym_sec;
8192 struct elf_link_hash_entry *h;
8193 Elf_Internal_Sym *sym;
8194 bfd_vma val;
8195
8196 r_type = ELF64_R_TYPE (rel->r_info);
8197 switch (r_type)
8198 {
8199 default:
8200 continue;
8201
8202 case R_PPC64_TOC16:
8203 case R_PPC64_TOC16_LO:
8204 case R_PPC64_TOC16_HI:
8205 case R_PPC64_TOC16_HA:
8206 case R_PPC64_TOC16_DS:
8207 case R_PPC64_TOC16_LO_DS:
8208 case R_PPC64_ADDR64:
8209 break;
8210 }
8211
8212 r_symndx = ELF64_R_SYM (rel->r_info);
8213 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8214 r_symndx, ibfd))
8215 goto error_ret;
8216
8217 if (sym_sec != toc || h != NULL || sym->st_value != 0)
8218 continue;
8219
8220 val = rel->r_addend;
8221
8222 if (val > toc->rawsize)
8223 val = toc->rawsize;
8224
8225 rel->r_addend -= skip[val >> 3];
8226 elf_section_data (sec)->relocs = relstart;
8227 }
8228
8229 if (elf_section_data (sec)->relocs != relstart)
8230 free (relstart);
8231 }
8232
8233 /* We shouldn't have local or global symbols defined in the TOC,
8234 but handle them anyway. */
8235 if (local_syms != NULL)
8236 {
8237 Elf_Internal_Sym *sym;
8238
8239 for (sym = local_syms;
8240 sym < local_syms + symtab_hdr->sh_info;
8241 ++sym)
8242 if (sym->st_value != 0
8243 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8244 {
8245 unsigned long i;
8246
8247 if (sym->st_value > toc->rawsize)
8248 i = toc->rawsize >> 3;
8249 else
8250 i = sym->st_value >> 3;
8251
8252 if (skip[sym->st_value >> 3] == (unsigned long) -1)
8253 {
8254 (*_bfd_error_handler)
8255 (_("%s defined on removed toc entry"),
8256 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8257 do
8258 ++i;
8259 while (skip[i] == (unsigned long) -1);
8260 sym->st_value = (bfd_vma) i << 3;
8261 }
8262
8263 sym->st_value -= skip[i];
8264 symtab_hdr->contents = (unsigned char *) local_syms;
8265 }
8266 }
8267
8268 /* Adjust any global syms defined in this toc input section. */
8269 if (toc_inf.global_toc_syms)
8270 {
8271 toc_inf.toc = toc;
8272 toc_inf.skip = skip;
8273 toc_inf.global_toc_syms = FALSE;
8274 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8275 &toc_inf);
8276 }
8277
8278 if (toc->reloc_count != 0)
8279 {
8280 Elf_Internal_Rela *wrel;
8281 bfd_size_type sz;
8282
8283 /* Read toc relocs. */
8284 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8285 TRUE);
8286 if (relstart == NULL)
8287 goto error_ret;
8288
8289 /* Remove unused toc relocs, and adjust those we keep. */
8290 wrel = relstart;
8291 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8292 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
8293 {
8294 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8295 wrel->r_info = rel->r_info;
8296 wrel->r_addend = rel->r_addend;
8297 ++wrel;
8298 }
8299 else if (!dec_dynrel_count (rel->r_info, toc, info,
8300 &local_syms, NULL, NULL))
8301 goto error_ret;
8302
8303 toc->reloc_count = wrel - relstart;
8304 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8305 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8306 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8307 }
8308 }
8309
8310 if (local_syms != NULL
8311 && symtab_hdr->contents != (unsigned char *) local_syms)
8312 {
8313 if (!info->keep_memory)
8314 free (local_syms);
8315 else
8316 symtab_hdr->contents = (unsigned char *) local_syms;
8317 }
8318 free (skip);
8319 }
8320
8321 return TRUE;
8322 }
8323
8324 /* Return true iff input section I references the TOC using
8325 instructions limited to +/-32k offsets. */
8326
8327 bfd_boolean
8328 ppc64_elf_has_small_toc_reloc (asection *i)
8329 {
8330 return (is_ppc64_elf (i->owner)
8331 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8332 }
8333
8334 /* Allocate space for one GOT entry. */
8335
8336 static void
8337 allocate_got (struct elf_link_hash_entry *h,
8338 struct bfd_link_info *info,
8339 struct got_entry *gent)
8340 {
8341 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8342 bfd_boolean dyn;
8343 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8344 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8345 ? 16 : 8);
8346 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8347 ? 2 : 1) * sizeof (Elf64_External_Rela);
8348 asection *got = ppc64_elf_tdata (gent->owner)->got;
8349
8350 gent->got.offset = got->size;
8351 got->size += entsize;
8352
8353 dyn = htab->elf.dynamic_sections_created;
8354 if ((info->shared
8355 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8356 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8357 || h->root.type != bfd_link_hash_undefweak))
8358 {
8359 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8360 relgot->size += rentsize;
8361 }
8362 else if (h->type == STT_GNU_IFUNC)
8363 {
8364 asection *relgot = htab->reliplt;
8365 relgot->size += rentsize;
8366 htab->got_reli_size += rentsize;
8367 }
8368 }
8369
8370 /* This function merges got entries in the same toc group. */
8371
8372 static void
8373 merge_got_entries (struct got_entry **pent)
8374 {
8375 struct got_entry *ent, *ent2;
8376
8377 for (ent = *pent; ent != NULL; ent = ent->next)
8378 if (!ent->is_indirect)
8379 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8380 if (!ent2->is_indirect
8381 && ent2->addend == ent->addend
8382 && ent2->tls_type == ent->tls_type
8383 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8384 {
8385 ent2->is_indirect = TRUE;
8386 ent2->got.ent = ent;
8387 }
8388 }
8389
8390 /* Allocate space in .plt, .got and associated reloc sections for
8391 dynamic relocs. */
8392
8393 static bfd_boolean
8394 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8395 {
8396 struct bfd_link_info *info;
8397 struct ppc_link_hash_table *htab;
8398 asection *s;
8399 struct ppc_link_hash_entry *eh;
8400 struct ppc_dyn_relocs *p;
8401 struct got_entry **pgent, *gent;
8402
8403 if (h->root.type == bfd_link_hash_indirect)
8404 return TRUE;
8405
8406 if (h->root.type == bfd_link_hash_warning)
8407 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8408
8409 info = (struct bfd_link_info *) inf;
8410 htab = ppc_hash_table (info);
8411 if (htab == NULL)
8412 return FALSE;
8413
8414 if ((htab->elf.dynamic_sections_created
8415 && h->dynindx != -1
8416 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8417 || h->type == STT_GNU_IFUNC)
8418 {
8419 struct plt_entry *pent;
8420 bfd_boolean doneone = FALSE;
8421 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8422 if (pent->plt.refcount > 0)
8423 {
8424 if (!htab->elf.dynamic_sections_created
8425 || h->dynindx == -1)
8426 {
8427 s = htab->iplt;
8428 pent->plt.offset = s->size;
8429 s->size += PLT_ENTRY_SIZE;
8430 s = htab->reliplt;
8431 }
8432 else
8433 {
8434 /* If this is the first .plt entry, make room for the special
8435 first entry. */
8436 s = htab->plt;
8437 if (s->size == 0)
8438 s->size += PLT_INITIAL_ENTRY_SIZE;
8439
8440 pent->plt.offset = s->size;
8441
8442 /* Make room for this entry. */
8443 s->size += PLT_ENTRY_SIZE;
8444
8445 /* Make room for the .glink code. */
8446 s = htab->glink;
8447 if (s->size == 0)
8448 s->size += GLINK_CALL_STUB_SIZE;
8449 /* We need bigger stubs past index 32767. */
8450 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8451 s->size += 4;
8452 s->size += 2*4;
8453
8454 /* We also need to make an entry in the .rela.plt section. */
8455 s = htab->relplt;
8456 }
8457 s->size += sizeof (Elf64_External_Rela);
8458 doneone = TRUE;
8459 }
8460 else
8461 pent->plt.offset = (bfd_vma) -1;
8462 if (!doneone)
8463 {
8464 h->plt.plist = NULL;
8465 h->needs_plt = 0;
8466 }
8467 }
8468 else
8469 {
8470 h->plt.plist = NULL;
8471 h->needs_plt = 0;
8472 }
8473
8474 eh = (struct ppc_link_hash_entry *) h;
8475 /* Run through the TLS GD got entries first if we're changing them
8476 to TPREL. */
8477 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8478 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8479 if (gent->got.refcount > 0
8480 && (gent->tls_type & TLS_GD) != 0)
8481 {
8482 /* This was a GD entry that has been converted to TPREL. If
8483 there happens to be a TPREL entry we can use that one. */
8484 struct got_entry *ent;
8485 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8486 if (ent->got.refcount > 0
8487 && (ent->tls_type & TLS_TPREL) != 0
8488 && ent->addend == gent->addend
8489 && ent->owner == gent->owner)
8490 {
8491 gent->got.refcount = 0;
8492 break;
8493 }
8494
8495 /* If not, then we'll be using our own TPREL entry. */
8496 if (gent->got.refcount != 0)
8497 gent->tls_type = TLS_TLS | TLS_TPREL;
8498 }
8499
8500 /* Remove any list entry that won't generate a word in the GOT before
8501 we call merge_got_entries. Otherwise we risk merging to empty
8502 entries. */
8503 pgent = &h->got.glist;
8504 while ((gent = *pgent) != NULL)
8505 if (gent->got.refcount > 0)
8506 {
8507 if ((gent->tls_type & TLS_LD) != 0
8508 && !h->def_dynamic)
8509 {
8510 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8511 *pgent = gent->next;
8512 }
8513 else
8514 pgent = &gent->next;
8515 }
8516 else
8517 *pgent = gent->next;
8518
8519 if (!htab->do_multi_toc)
8520 merge_got_entries (&h->got.glist);
8521
8522 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8523 if (!gent->is_indirect)
8524 {
8525 /* Make sure this symbol is output as a dynamic symbol.
8526 Undefined weak syms won't yet be marked as dynamic,
8527 nor will all TLS symbols. */
8528 if (h->dynindx == -1
8529 && !h->forced_local
8530 && h->type != STT_GNU_IFUNC
8531 && htab->elf.dynamic_sections_created)
8532 {
8533 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8534 return FALSE;
8535 }
8536
8537 if (!is_ppc64_elf (gent->owner))
8538 abort ();
8539
8540 allocate_got (h, info, gent);
8541 }
8542
8543 if (eh->dyn_relocs == NULL
8544 || (!htab->elf.dynamic_sections_created
8545 && h->type != STT_GNU_IFUNC))
8546 return TRUE;
8547
8548 /* In the shared -Bsymbolic case, discard space allocated for
8549 dynamic pc-relative relocs against symbols which turn out to be
8550 defined in regular objects. For the normal shared case, discard
8551 space for relocs that have become local due to symbol visibility
8552 changes. */
8553
8554 if (info->shared)
8555 {
8556 /* Relocs that use pc_count are those that appear on a call insn,
8557 or certain REL relocs (see must_be_dyn_reloc) that can be
8558 generated via assembly. We want calls to protected symbols to
8559 resolve directly to the function rather than going via the plt.
8560 If people want function pointer comparisons to work as expected
8561 then they should avoid writing weird assembly. */
8562 if (SYMBOL_CALLS_LOCAL (info, h))
8563 {
8564 struct ppc_dyn_relocs **pp;
8565
8566 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8567 {
8568 p->count -= p->pc_count;
8569 p->pc_count = 0;
8570 if (p->count == 0)
8571 *pp = p->next;
8572 else
8573 pp = &p->next;
8574 }
8575 }
8576
8577 /* Also discard relocs on undefined weak syms with non-default
8578 visibility. */
8579 if (eh->dyn_relocs != NULL
8580 && h->root.type == bfd_link_hash_undefweak)
8581 {
8582 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8583 eh->dyn_relocs = NULL;
8584
8585 /* Make sure this symbol is output as a dynamic symbol.
8586 Undefined weak syms won't yet be marked as dynamic. */
8587 else if (h->dynindx == -1
8588 && !h->forced_local)
8589 {
8590 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8591 return FALSE;
8592 }
8593 }
8594 }
8595 else if (h->type == STT_GNU_IFUNC)
8596 {
8597 if (!h->non_got_ref)
8598 eh->dyn_relocs = NULL;
8599 }
8600 else if (ELIMINATE_COPY_RELOCS)
8601 {
8602 /* For the non-shared case, discard space for relocs against
8603 symbols which turn out to need copy relocs or are not
8604 dynamic. */
8605
8606 if (!h->non_got_ref
8607 && !h->def_regular)
8608 {
8609 /* Make sure this symbol is output as a dynamic symbol.
8610 Undefined weak syms won't yet be marked as dynamic. */
8611 if (h->dynindx == -1
8612 && !h->forced_local)
8613 {
8614 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8615 return FALSE;
8616 }
8617
8618 /* If that succeeded, we know we'll be keeping all the
8619 relocs. */
8620 if (h->dynindx != -1)
8621 goto keep;
8622 }
8623
8624 eh->dyn_relocs = NULL;
8625
8626 keep: ;
8627 }
8628
8629 /* Finally, allocate space. */
8630 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8631 {
8632 asection *sreloc = elf_section_data (p->sec)->sreloc;
8633 if (!htab->elf.dynamic_sections_created)
8634 sreloc = htab->reliplt;
8635 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8636 }
8637
8638 return TRUE;
8639 }
8640
8641 /* Find any dynamic relocs that apply to read-only sections. */
8642
8643 static bfd_boolean
8644 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8645 {
8646 struct ppc_link_hash_entry *eh;
8647 struct ppc_dyn_relocs *p;
8648
8649 if (h->root.type == bfd_link_hash_warning)
8650 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8651
8652 eh = (struct ppc_link_hash_entry *) h;
8653 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8654 {
8655 asection *s = p->sec->output_section;
8656
8657 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8658 {
8659 struct bfd_link_info *info = inf;
8660
8661 info->flags |= DF_TEXTREL;
8662
8663 /* Not an error, just cut short the traversal. */
8664 return FALSE;
8665 }
8666 }
8667 return TRUE;
8668 }
8669
8670 /* Set the sizes of the dynamic sections. */
8671
8672 static bfd_boolean
8673 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8674 struct bfd_link_info *info)
8675 {
8676 struct ppc_link_hash_table *htab;
8677 bfd *dynobj;
8678 asection *s;
8679 bfd_boolean relocs;
8680 bfd *ibfd;
8681 struct got_entry *first_tlsld;
8682
8683 htab = ppc_hash_table (info);
8684 if (htab == NULL)
8685 return FALSE;
8686
8687 dynobj = htab->elf.dynobj;
8688 if (dynobj == NULL)
8689 abort ();
8690
8691 if (htab->elf.dynamic_sections_created)
8692 {
8693 /* Set the contents of the .interp section to the interpreter. */
8694 if (info->executable)
8695 {
8696 s = bfd_get_section_by_name (dynobj, ".interp");
8697 if (s == NULL)
8698 abort ();
8699 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8700 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8701 }
8702 }
8703
8704 /* Set up .got offsets for local syms, and space for local dynamic
8705 relocs. */
8706 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8707 {
8708 struct got_entry **lgot_ents;
8709 struct got_entry **end_lgot_ents;
8710 struct plt_entry **local_plt;
8711 struct plt_entry **end_local_plt;
8712 unsigned char *lgot_masks;
8713 bfd_size_type locsymcount;
8714 Elf_Internal_Shdr *symtab_hdr;
8715 asection *srel;
8716
8717 if (!is_ppc64_elf (ibfd))
8718 continue;
8719
8720 for (s = ibfd->sections; s != NULL; s = s->next)
8721 {
8722 struct ppc_dyn_relocs *p;
8723
8724 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8725 {
8726 if (!bfd_is_abs_section (p->sec)
8727 && bfd_is_abs_section (p->sec->output_section))
8728 {
8729 /* Input section has been discarded, either because
8730 it is a copy of a linkonce section or due to
8731 linker script /DISCARD/, so we'll be discarding
8732 the relocs too. */
8733 }
8734 else if (p->count != 0)
8735 {
8736 srel = elf_section_data (p->sec)->sreloc;
8737 if (!htab->elf.dynamic_sections_created)
8738 srel = htab->reliplt;
8739 srel->size += p->count * sizeof (Elf64_External_Rela);
8740 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8741 info->flags |= DF_TEXTREL;
8742 }
8743 }
8744 }
8745
8746 lgot_ents = elf_local_got_ents (ibfd);
8747 if (!lgot_ents)
8748 continue;
8749
8750 symtab_hdr = &elf_symtab_hdr (ibfd);
8751 locsymcount = symtab_hdr->sh_info;
8752 end_lgot_ents = lgot_ents + locsymcount;
8753 local_plt = (struct plt_entry **) end_lgot_ents;
8754 end_local_plt = local_plt + locsymcount;
8755 lgot_masks = (unsigned char *) end_local_plt;
8756 s = ppc64_elf_tdata (ibfd)->got;
8757 srel = ppc64_elf_tdata (ibfd)->relgot;
8758 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8759 {
8760 struct got_entry **pent, *ent;
8761
8762 pent = lgot_ents;
8763 while ((ent = *pent) != NULL)
8764 if (ent->got.refcount > 0)
8765 {
8766 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8767 {
8768 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8769 *pent = ent->next;
8770 }
8771 else
8772 {
8773 unsigned int num = 1;
8774 ent->got.offset = s->size;
8775 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8776 num = 2;
8777 s->size += num * 8;
8778 if (info->shared)
8779 srel->size += num * sizeof (Elf64_External_Rela);
8780 else if ((*lgot_masks & PLT_IFUNC) != 0)
8781 {
8782 htab->reliplt->size
8783 += num * sizeof (Elf64_External_Rela);
8784 htab->got_reli_size
8785 += num * sizeof (Elf64_External_Rela);
8786 }
8787 pent = &ent->next;
8788 }
8789 }
8790 else
8791 *pent = ent->next;
8792 }
8793
8794 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8795 for (; local_plt < end_local_plt; ++local_plt)
8796 {
8797 struct plt_entry *ent;
8798
8799 for (ent = *local_plt; ent != NULL; ent = ent->next)
8800 if (ent->plt.refcount > 0)
8801 {
8802 s = htab->iplt;
8803 ent->plt.offset = s->size;
8804 s->size += PLT_ENTRY_SIZE;
8805
8806 htab->reliplt->size += sizeof (Elf64_External_Rela);
8807 }
8808 else
8809 ent->plt.offset = (bfd_vma) -1;
8810 }
8811 }
8812
8813 /* Allocate global sym .plt and .got entries, and space for global
8814 sym dynamic relocs. */
8815 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8816
8817 first_tlsld = NULL;
8818 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8819 {
8820 struct got_entry *ent;
8821
8822 if (!is_ppc64_elf (ibfd))
8823 continue;
8824
8825 ent = ppc64_tlsld_got (ibfd);
8826 if (ent->got.refcount > 0)
8827 {
8828 if (!htab->do_multi_toc && first_tlsld != NULL)
8829 {
8830 ent->is_indirect = TRUE;
8831 ent->got.ent = first_tlsld;
8832 }
8833 else
8834 {
8835 if (first_tlsld == NULL)
8836 first_tlsld = ent;
8837 s = ppc64_elf_tdata (ibfd)->got;
8838 ent->got.offset = s->size;
8839 ent->owner = ibfd;
8840 s->size += 16;
8841 if (info->shared)
8842 {
8843 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8844 srel->size += sizeof (Elf64_External_Rela);
8845 }
8846 }
8847 }
8848 else
8849 ent->got.offset = (bfd_vma) -1;
8850 }
8851
8852 /* We now have determined the sizes of the various dynamic sections.
8853 Allocate memory for them. */
8854 relocs = FALSE;
8855 for (s = dynobj->sections; s != NULL; s = s->next)
8856 {
8857 if ((s->flags & SEC_LINKER_CREATED) == 0)
8858 continue;
8859
8860 if (s == htab->brlt || s == htab->relbrlt)
8861 /* These haven't been allocated yet; don't strip. */
8862 continue;
8863 else if (s == htab->got
8864 || s == htab->plt
8865 || s == htab->iplt
8866 || s == htab->glink
8867 || s == htab->dynbss)
8868 {
8869 /* Strip this section if we don't need it; see the
8870 comment below. */
8871 }
8872 else if (CONST_STRNEQ (s->name, ".rela"))
8873 {
8874 if (s->size != 0)
8875 {
8876 if (s != htab->relplt)
8877 relocs = TRUE;
8878
8879 /* We use the reloc_count field as a counter if we need
8880 to copy relocs into the output file. */
8881 s->reloc_count = 0;
8882 }
8883 }
8884 else
8885 {
8886 /* It's not one of our sections, so don't allocate space. */
8887 continue;
8888 }
8889
8890 if (s->size == 0)
8891 {
8892 /* If we don't need this section, strip it from the
8893 output file. This is mostly to handle .rela.bss and
8894 .rela.plt. We must create both sections in
8895 create_dynamic_sections, because they must be created
8896 before the linker maps input sections to output
8897 sections. The linker does that before
8898 adjust_dynamic_symbol is called, and it is that
8899 function which decides whether anything needs to go
8900 into these sections. */
8901 s->flags |= SEC_EXCLUDE;
8902 continue;
8903 }
8904
8905 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8906 continue;
8907
8908 /* Allocate memory for the section contents. We use bfd_zalloc
8909 here in case unused entries are not reclaimed before the
8910 section's contents are written out. This should not happen,
8911 but this way if it does we get a R_PPC64_NONE reloc in .rela
8912 sections instead of garbage.
8913 We also rely on the section contents being zero when writing
8914 the GOT. */
8915 s->contents = bfd_zalloc (dynobj, s->size);
8916 if (s->contents == NULL)
8917 return FALSE;
8918 }
8919
8920 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8921 {
8922 if (!is_ppc64_elf (ibfd))
8923 continue;
8924
8925 s = ppc64_elf_tdata (ibfd)->got;
8926 if (s != NULL && s != htab->got)
8927 {
8928 if (s->size == 0)
8929 s->flags |= SEC_EXCLUDE;
8930 else
8931 {
8932 s->contents = bfd_zalloc (ibfd, s->size);
8933 if (s->contents == NULL)
8934 return FALSE;
8935 }
8936 }
8937 s = ppc64_elf_tdata (ibfd)->relgot;
8938 if (s != NULL)
8939 {
8940 if (s->size == 0)
8941 s->flags |= SEC_EXCLUDE;
8942 else
8943 {
8944 s->contents = bfd_zalloc (ibfd, s->size);
8945 if (s->contents == NULL)
8946 return FALSE;
8947 relocs = TRUE;
8948 s->reloc_count = 0;
8949 }
8950 }
8951 }
8952
8953 if (htab->elf.dynamic_sections_created)
8954 {
8955 /* Add some entries to the .dynamic section. We fill in the
8956 values later, in ppc64_elf_finish_dynamic_sections, but we
8957 must add the entries now so that we get the correct size for
8958 the .dynamic section. The DT_DEBUG entry is filled in by the
8959 dynamic linker and used by the debugger. */
8960 #define add_dynamic_entry(TAG, VAL) \
8961 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8962
8963 if (info->executable)
8964 {
8965 if (!add_dynamic_entry (DT_DEBUG, 0))
8966 return FALSE;
8967 }
8968
8969 if (htab->plt != NULL && htab->plt->size != 0)
8970 {
8971 if (!add_dynamic_entry (DT_PLTGOT, 0)
8972 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8973 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8974 || !add_dynamic_entry (DT_JMPREL, 0)
8975 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8976 return FALSE;
8977 }
8978
8979 if (NO_OPD_RELOCS)
8980 {
8981 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8982 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8983 return FALSE;
8984 }
8985
8986 if (!htab->no_tls_get_addr_opt
8987 && htab->tls_get_addr_fd != NULL
8988 && htab->tls_get_addr_fd->elf.plt.plist != NULL
8989 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
8990 return FALSE;
8991
8992 if (relocs)
8993 {
8994 if (!add_dynamic_entry (DT_RELA, 0)
8995 || !add_dynamic_entry (DT_RELASZ, 0)
8996 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8997 return FALSE;
8998
8999 /* If any dynamic relocs apply to a read-only section,
9000 then we need a DT_TEXTREL entry. */
9001 if ((info->flags & DF_TEXTREL) == 0)
9002 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9003
9004 if ((info->flags & DF_TEXTREL) != 0)
9005 {
9006 if (!add_dynamic_entry (DT_TEXTREL, 0))
9007 return FALSE;
9008 }
9009 }
9010 }
9011 #undef add_dynamic_entry
9012
9013 return TRUE;
9014 }
9015
9016 /* Determine the type of stub needed, if any, for a call. */
9017
9018 static inline enum ppc_stub_type
9019 ppc_type_of_stub (asection *input_sec,
9020 const Elf_Internal_Rela *rel,
9021 struct ppc_link_hash_entry **hash,
9022 struct plt_entry **plt_ent,
9023 bfd_vma destination)
9024 {
9025 struct ppc_link_hash_entry *h = *hash;
9026 bfd_vma location;
9027 bfd_vma branch_offset;
9028 bfd_vma max_branch_offset;
9029 enum elf_ppc64_reloc_type r_type;
9030
9031 if (h != NULL)
9032 {
9033 struct plt_entry *ent;
9034 struct ppc_link_hash_entry *fdh = h;
9035 if (h->oh != NULL
9036 && h->oh->is_func_descriptor)
9037 {
9038 fdh = ppc_follow_link (h->oh);
9039 *hash = fdh;
9040 }
9041
9042 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9043 if (ent->addend == rel->r_addend
9044 && ent->plt.offset != (bfd_vma) -1)
9045 {
9046 *plt_ent = ent;
9047 return ppc_stub_plt_call;
9048 }
9049
9050 /* Here, we know we don't have a plt entry. If we don't have a
9051 either a defined function descriptor or a defined entry symbol
9052 in a regular object file, then it is pointless trying to make
9053 any other type of stub. */
9054 if (!is_static_defined (&fdh->elf)
9055 && !is_static_defined (&h->elf))
9056 return ppc_stub_none;
9057 }
9058 else if (elf_local_got_ents (input_sec->owner) != NULL)
9059 {
9060 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9061 struct plt_entry **local_plt = (struct plt_entry **)
9062 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9063 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9064
9065 if (local_plt[r_symndx] != NULL)
9066 {
9067 struct plt_entry *ent;
9068
9069 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9070 if (ent->addend == rel->r_addend
9071 && ent->plt.offset != (bfd_vma) -1)
9072 {
9073 *plt_ent = ent;
9074 return ppc_stub_plt_call;
9075 }
9076 }
9077 }
9078
9079 /* Determine where the call point is. */
9080 location = (input_sec->output_offset
9081 + input_sec->output_section->vma
9082 + rel->r_offset);
9083
9084 branch_offset = destination - location;
9085 r_type = ELF64_R_TYPE (rel->r_info);
9086
9087 /* Determine if a long branch stub is needed. */
9088 max_branch_offset = 1 << 25;
9089 if (r_type != R_PPC64_REL24)
9090 max_branch_offset = 1 << 15;
9091
9092 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9093 /* We need a stub. Figure out whether a long_branch or plt_branch
9094 is needed later. */
9095 return ppc_stub_long_branch;
9096
9097 return ppc_stub_none;
9098 }
9099
9100 /* Build a .plt call stub. */
9101
9102 static inline bfd_byte *
9103 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9104 {
9105 #define PPC_LO(v) ((v) & 0xffff)
9106 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9107 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9108
9109 if (PPC_HA (offset) != 0)
9110 {
9111 if (r != NULL)
9112 {
9113 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9114 r[1].r_offset = r[0].r_offset + 8;
9115 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9116 r[1].r_addend = r[0].r_addend;
9117 if (PPC_HA (offset + 16) != PPC_HA (offset))
9118 {
9119 r[2].r_offset = r[1].r_offset + 4;
9120 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9121 r[2].r_addend = r[0].r_addend;
9122 }
9123 else
9124 {
9125 r[2].r_offset = r[1].r_offset + 8;
9126 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9127 r[2].r_addend = r[0].r_addend + 8;
9128 r[3].r_offset = r[2].r_offset + 4;
9129 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9130 r[3].r_addend = r[0].r_addend + 16;
9131 }
9132 }
9133 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9134 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9135 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9136 if (PPC_HA (offset + 16) != PPC_HA (offset))
9137 {
9138 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9139 offset = 0;
9140 }
9141 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9142 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9143 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9144 bfd_put_32 (obfd, BCTR, p), p += 4;
9145 }
9146 else
9147 {
9148 if (r != NULL)
9149 {
9150 r[0].r_offset += 4;
9151 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9152 if (PPC_HA (offset + 16) != PPC_HA (offset))
9153 {
9154 r[1].r_offset = r[0].r_offset + 4;
9155 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9156 r[1].r_addend = r[0].r_addend;
9157 }
9158 else
9159 {
9160 r[1].r_offset = r[0].r_offset + 8;
9161 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9162 r[1].r_addend = r[0].r_addend + 16;
9163 r[2].r_offset = r[1].r_offset + 4;
9164 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9165 r[2].r_addend = r[0].r_addend + 8;
9166 }
9167 }
9168 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9169 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9170 if (PPC_HA (offset + 16) != PPC_HA (offset))
9171 {
9172 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9173 offset = 0;
9174 }
9175 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9176 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9177 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9178 bfd_put_32 (obfd, BCTR, p), p += 4;
9179 }
9180 return p;
9181 }
9182
9183 /* Build a special .plt call stub for __tls_get_addr. */
9184
9185 #define LD_R11_0R3 0xe9630000
9186 #define LD_R12_0R3 0xe9830000
9187 #define MR_R0_R3 0x7c601b78
9188 #define CMPDI_R11_0 0x2c2b0000
9189 #define ADD_R3_R12_R13 0x7c6c6a14
9190 #define BEQLR 0x4d820020
9191 #define MR_R3_R0 0x7c030378
9192 #define MFLR_R11 0x7d6802a6
9193 #define STD_R11_0R1 0xf9610000
9194 #define BCTRL 0x4e800421
9195 #define LD_R11_0R1 0xe9610000
9196 #define LD_R2_0R1 0xe8410000
9197 #define MTLR_R11 0x7d6803a6
9198
9199 static inline bfd_byte *
9200 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9201 Elf_Internal_Rela *r)
9202 {
9203 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9204 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9205 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9206 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9207 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9208 bfd_put_32 (obfd, BEQLR, p), p += 4;
9209 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9210 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9211 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9212
9213 if (r != NULL)
9214 r[0].r_offset += 9 * 4;
9215 p = build_plt_stub (obfd, p, offset, r);
9216 bfd_put_32 (obfd, BCTRL, p - 4);
9217
9218 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9219 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9220 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9221 bfd_put_32 (obfd, BLR, p), p += 4;
9222
9223 return p;
9224 }
9225
9226 static Elf_Internal_Rela *
9227 get_relocs (asection *sec, int count)
9228 {
9229 Elf_Internal_Rela *relocs;
9230 struct bfd_elf_section_data *elfsec_data;
9231
9232 elfsec_data = elf_section_data (sec);
9233 relocs = elfsec_data->relocs;
9234 if (relocs == NULL)
9235 {
9236 bfd_size_type relsize;
9237 relsize = sec->reloc_count * sizeof (*relocs);
9238 relocs = bfd_alloc (sec->owner, relsize);
9239 if (relocs == NULL)
9240 return NULL;
9241 elfsec_data->relocs = relocs;
9242 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9243 * sizeof (Elf64_External_Rela));
9244 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9245 sec->reloc_count = 0;
9246 }
9247 relocs += sec->reloc_count;
9248 sec->reloc_count += count;
9249 return relocs;
9250 }
9251
9252 static bfd_boolean
9253 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9254 {
9255 struct ppc_stub_hash_entry *stub_entry;
9256 struct ppc_branch_hash_entry *br_entry;
9257 struct bfd_link_info *info;
9258 struct ppc_link_hash_table *htab;
9259 bfd_byte *loc;
9260 bfd_byte *p;
9261 bfd_vma dest, off;
9262 int size;
9263 Elf_Internal_Rela *r;
9264 asection *plt;
9265
9266 /* Massage our args to the form they really have. */
9267 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9268 info = in_arg;
9269
9270 htab = ppc_hash_table (info);
9271 if (htab == NULL)
9272 return FALSE;
9273
9274 /* Make a note of the offset within the stubs for this entry. */
9275 stub_entry->stub_offset = stub_entry->stub_sec->size;
9276 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9277
9278 htab->stub_count[stub_entry->stub_type - 1] += 1;
9279 switch (stub_entry->stub_type)
9280 {
9281 case ppc_stub_long_branch:
9282 case ppc_stub_long_branch_r2off:
9283 /* Branches are relative. This is where we are going to. */
9284 off = dest = (stub_entry->target_value
9285 + stub_entry->target_section->output_offset
9286 + stub_entry->target_section->output_section->vma);
9287
9288 /* And this is where we are coming from. */
9289 off -= (stub_entry->stub_offset
9290 + stub_entry->stub_sec->output_offset
9291 + stub_entry->stub_sec->output_section->vma);
9292
9293 size = 4;
9294 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9295 {
9296 bfd_vma r2off;
9297
9298 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9299 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9300 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9301 loc += 4;
9302 size = 12;
9303 if (PPC_HA (r2off) != 0)
9304 {
9305 size = 16;
9306 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9307 loc += 4;
9308 }
9309 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9310 loc += 4;
9311 off -= size - 4;
9312 }
9313 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9314
9315 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9316 {
9317 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9318 stub_entry->root.string);
9319 htab->stub_error = TRUE;
9320 return FALSE;
9321 }
9322
9323 if (info->emitrelocations)
9324 {
9325 r = get_relocs (stub_entry->stub_sec, 1);
9326 if (r == NULL)
9327 return FALSE;
9328 r->r_offset = loc - stub_entry->stub_sec->contents;
9329 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9330 r->r_addend = dest;
9331 if (stub_entry->h != NULL)
9332 {
9333 struct elf_link_hash_entry **hashes;
9334 unsigned long symndx;
9335 struct ppc_link_hash_entry *h;
9336
9337 hashes = elf_sym_hashes (htab->stub_bfd);
9338 if (hashes == NULL)
9339 {
9340 bfd_size_type hsize;
9341
9342 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9343 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9344 if (hashes == NULL)
9345 return FALSE;
9346 elf_sym_hashes (htab->stub_bfd) = hashes;
9347 htab->stub_globals = 1;
9348 }
9349 symndx = htab->stub_globals++;
9350 h = stub_entry->h;
9351 hashes[symndx] = &h->elf;
9352 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9353 if (h->oh != NULL && h->oh->is_func)
9354 h = ppc_follow_link (h->oh);
9355 if (h->elf.root.u.def.section != stub_entry->target_section)
9356 /* H is an opd symbol. The addend must be zero. */
9357 r->r_addend = 0;
9358 else
9359 {
9360 off = (h->elf.root.u.def.value
9361 + h->elf.root.u.def.section->output_offset
9362 + h->elf.root.u.def.section->output_section->vma);
9363 r->r_addend -= off;
9364 }
9365 }
9366 }
9367 break;
9368
9369 case ppc_stub_plt_branch:
9370 case ppc_stub_plt_branch_r2off:
9371 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9372 stub_entry->root.string + 9,
9373 FALSE, FALSE);
9374 if (br_entry == NULL)
9375 {
9376 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9377 stub_entry->root.string);
9378 htab->stub_error = TRUE;
9379 return FALSE;
9380 }
9381
9382 dest = (stub_entry->target_value
9383 + stub_entry->target_section->output_offset
9384 + stub_entry->target_section->output_section->vma);
9385
9386 bfd_put_64 (htab->brlt->owner, dest,
9387 htab->brlt->contents + br_entry->offset);
9388
9389 if (br_entry->iter == htab->stub_iteration)
9390 {
9391 br_entry->iter = 0;
9392
9393 if (htab->relbrlt != NULL)
9394 {
9395 /* Create a reloc for the branch lookup table entry. */
9396 Elf_Internal_Rela rela;
9397 bfd_byte *rl;
9398
9399 rela.r_offset = (br_entry->offset
9400 + htab->brlt->output_offset
9401 + htab->brlt->output_section->vma);
9402 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9403 rela.r_addend = dest;
9404
9405 rl = htab->relbrlt->contents;
9406 rl += (htab->relbrlt->reloc_count++
9407 * sizeof (Elf64_External_Rela));
9408 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9409 }
9410 else if (info->emitrelocations)
9411 {
9412 r = get_relocs (htab->brlt, 1);
9413 if (r == NULL)
9414 return FALSE;
9415 /* brlt, being SEC_LINKER_CREATED does not go through the
9416 normal reloc processing. Symbols and offsets are not
9417 translated from input file to output file form, so
9418 set up the offset per the output file. */
9419 r->r_offset = (br_entry->offset
9420 + htab->brlt->output_offset
9421 + htab->brlt->output_section->vma);
9422 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9423 r->r_addend = dest;
9424 }
9425 }
9426
9427 dest = (br_entry->offset
9428 + htab->brlt->output_offset
9429 + htab->brlt->output_section->vma);
9430
9431 off = (dest
9432 - elf_gp (htab->brlt->output_section->owner)
9433 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9434
9435 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9436 {
9437 (*_bfd_error_handler)
9438 (_("linkage table error against `%s'"),
9439 stub_entry->root.string);
9440 bfd_set_error (bfd_error_bad_value);
9441 htab->stub_error = TRUE;
9442 return FALSE;
9443 }
9444
9445 if (info->emitrelocations)
9446 {
9447 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9448 if (r == NULL)
9449 return FALSE;
9450 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9451 if (bfd_big_endian (info->output_bfd))
9452 r[0].r_offset += 2;
9453 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9454 r[0].r_offset += 4;
9455 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9456 r[0].r_addend = dest;
9457 if (PPC_HA (off) != 0)
9458 {
9459 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9460 r[1].r_offset = r[0].r_offset + 4;
9461 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9462 r[1].r_addend = r[0].r_addend;
9463 }
9464 }
9465
9466 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9467 {
9468 if (PPC_HA (off) != 0)
9469 {
9470 size = 16;
9471 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9472 loc += 4;
9473 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9474 }
9475 else
9476 {
9477 size = 12;
9478 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9479 }
9480 }
9481 else
9482 {
9483 bfd_vma r2off;
9484
9485 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9486 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9487 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9488 loc += 4;
9489 size = 20;
9490 if (PPC_HA (off) != 0)
9491 {
9492 size += 4;
9493 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9494 loc += 4;
9495 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9496 loc += 4;
9497 }
9498 else
9499 {
9500 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9501 loc += 4;
9502 }
9503
9504 if (PPC_HA (r2off) != 0)
9505 {
9506 size += 4;
9507 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9508 loc += 4;
9509 }
9510 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9511 }
9512 loc += 4;
9513 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9514 loc += 4;
9515 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9516 break;
9517
9518 case ppc_stub_plt_call:
9519 if (stub_entry->h != NULL
9520 && stub_entry->h->is_func_descriptor
9521 && stub_entry->h->oh != NULL)
9522 {
9523 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9524
9525 /* If the old-ABI "dot-symbol" is undefined make it weak so
9526 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9527 FIXME: We used to define the symbol on one of the call
9528 stubs instead, which is why we test symbol section id
9529 against htab->top_id in various places. Likely all
9530 these checks could now disappear. */
9531 if (fh->elf.root.type == bfd_link_hash_undefined)
9532 fh->elf.root.type = bfd_link_hash_undefweak;
9533 }
9534
9535 /* Now build the stub. */
9536 dest = stub_entry->plt_ent->plt.offset & ~1;
9537 if (dest >= (bfd_vma) -2)
9538 abort ();
9539
9540 plt = htab->plt;
9541 if (!htab->elf.dynamic_sections_created
9542 || stub_entry->h == NULL
9543 || stub_entry->h->elf.dynindx == -1)
9544 plt = htab->iplt;
9545
9546 dest += plt->output_offset + plt->output_section->vma;
9547
9548 if (stub_entry->h == NULL
9549 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9550 {
9551 Elf_Internal_Rela rela;
9552 bfd_byte *rl;
9553
9554 rela.r_offset = dest;
9555 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9556 rela.r_addend = (stub_entry->target_value
9557 + stub_entry->target_section->output_offset
9558 + stub_entry->target_section->output_section->vma);
9559
9560 rl = (htab->reliplt->contents
9561 + (htab->reliplt->reloc_count++
9562 * sizeof (Elf64_External_Rela)));
9563 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9564 stub_entry->plt_ent->plt.offset |= 1;
9565 }
9566
9567 off = (dest
9568 - elf_gp (plt->output_section->owner)
9569 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9570
9571 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9572 {
9573 (*_bfd_error_handler)
9574 (_("linkage table error against `%s'"),
9575 stub_entry->h != NULL
9576 ? stub_entry->h->elf.root.root.string
9577 : "<local sym>");
9578 bfd_set_error (bfd_error_bad_value);
9579 htab->stub_error = TRUE;
9580 return FALSE;
9581 }
9582
9583 r = NULL;
9584 if (info->emitrelocations)
9585 {
9586 r = get_relocs (stub_entry->stub_sec,
9587 (2 + (PPC_HA (off) != 0)
9588 + (PPC_HA (off + 16) == PPC_HA (off))));
9589 if (r == NULL)
9590 return FALSE;
9591 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9592 if (bfd_big_endian (info->output_bfd))
9593 r[0].r_offset += 2;
9594 r[0].r_addend = dest;
9595 }
9596 if (stub_entry->h != NULL
9597 && (stub_entry->h == htab->tls_get_addr_fd
9598 || stub_entry->h == htab->tls_get_addr)
9599 && !htab->no_tls_get_addr_opt)
9600 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9601 else
9602 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9603 size = p - loc;
9604 break;
9605
9606 default:
9607 BFD_FAIL ();
9608 return FALSE;
9609 }
9610
9611 stub_entry->stub_sec->size += size;
9612
9613 if (htab->emit_stub_syms)
9614 {
9615 struct elf_link_hash_entry *h;
9616 size_t len1, len2;
9617 char *name;
9618 const char *const stub_str[] = { "long_branch",
9619 "long_branch_r2off",
9620 "plt_branch",
9621 "plt_branch_r2off",
9622 "plt_call" };
9623
9624 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9625 len2 = strlen (stub_entry->root.string);
9626 name = bfd_malloc (len1 + len2 + 2);
9627 if (name == NULL)
9628 return FALSE;
9629 memcpy (name, stub_entry->root.string, 9);
9630 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9631 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9632 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9633 if (h == NULL)
9634 return FALSE;
9635 if (h->root.type == bfd_link_hash_new)
9636 {
9637 h->root.type = bfd_link_hash_defined;
9638 h->root.u.def.section = stub_entry->stub_sec;
9639 h->root.u.def.value = stub_entry->stub_offset;
9640 h->ref_regular = 1;
9641 h->def_regular = 1;
9642 h->ref_regular_nonweak = 1;
9643 h->forced_local = 1;
9644 h->non_elf = 0;
9645 }
9646 }
9647
9648 return TRUE;
9649 }
9650
9651 /* As above, but don't actually build the stub. Just bump offset so
9652 we know stub section sizes, and select plt_branch stubs where
9653 long_branch stubs won't do. */
9654
9655 static bfd_boolean
9656 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9657 {
9658 struct ppc_stub_hash_entry *stub_entry;
9659 struct bfd_link_info *info;
9660 struct ppc_link_hash_table *htab;
9661 bfd_vma off;
9662 int size;
9663
9664 /* Massage our args to the form they really have. */
9665 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9666 info = in_arg;
9667
9668 htab = ppc_hash_table (info);
9669 if (htab == NULL)
9670 return FALSE;
9671
9672 if (stub_entry->stub_type == ppc_stub_plt_call)
9673 {
9674 asection *plt;
9675 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9676 if (off >= (bfd_vma) -2)
9677 abort ();
9678 plt = htab->plt;
9679 if (!htab->elf.dynamic_sections_created
9680 || stub_entry->h == NULL
9681 || stub_entry->h->elf.dynindx == -1)
9682 plt = htab->iplt;
9683 off += (plt->output_offset
9684 + plt->output_section->vma
9685 - elf_gp (plt->output_section->owner)
9686 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9687
9688 size = PLT_CALL_STUB_SIZE;
9689 if (PPC_HA (off) == 0)
9690 size -= 4;
9691 if (PPC_HA (off + 16) != PPC_HA (off))
9692 size += 4;
9693 if (stub_entry->h != NULL
9694 && (stub_entry->h == htab->tls_get_addr_fd
9695 || stub_entry->h == htab->tls_get_addr)
9696 && !htab->no_tls_get_addr_opt)
9697 size += 13 * 4;
9698 if (info->emitrelocations)
9699 {
9700 stub_entry->stub_sec->reloc_count
9701 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9702 stub_entry->stub_sec->flags |= SEC_RELOC;
9703 }
9704 }
9705 else
9706 {
9707 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9708 variants. */
9709 bfd_vma r2off = 0;
9710
9711 off = (stub_entry->target_value
9712 + stub_entry->target_section->output_offset
9713 + stub_entry->target_section->output_section->vma);
9714 off -= (stub_entry->stub_sec->size
9715 + stub_entry->stub_sec->output_offset
9716 + stub_entry->stub_sec->output_section->vma);
9717
9718 /* Reset the stub type from the plt variant in case we now
9719 can reach with a shorter stub. */
9720 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9721 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9722
9723 size = 4;
9724 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9725 {
9726 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9727 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9728 size = 12;
9729 if (PPC_HA (r2off) != 0)
9730 size = 16;
9731 off -= size - 4;
9732 }
9733
9734 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9735 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9736 {
9737 struct ppc_branch_hash_entry *br_entry;
9738
9739 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9740 stub_entry->root.string + 9,
9741 TRUE, FALSE);
9742 if (br_entry == NULL)
9743 {
9744 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9745 stub_entry->root.string);
9746 htab->stub_error = TRUE;
9747 return FALSE;
9748 }
9749
9750 if (br_entry->iter != htab->stub_iteration)
9751 {
9752 br_entry->iter = htab->stub_iteration;
9753 br_entry->offset = htab->brlt->size;
9754 htab->brlt->size += 8;
9755
9756 if (htab->relbrlt != NULL)
9757 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9758 else if (info->emitrelocations)
9759 {
9760 htab->brlt->reloc_count += 1;
9761 htab->brlt->flags |= SEC_RELOC;
9762 }
9763 }
9764
9765 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9766 off = (br_entry->offset
9767 + htab->brlt->output_offset
9768 + htab->brlt->output_section->vma
9769 - elf_gp (htab->brlt->output_section->owner)
9770 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9771
9772 if (info->emitrelocations)
9773 {
9774 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9775 stub_entry->stub_sec->flags |= SEC_RELOC;
9776 }
9777
9778 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9779 {
9780 size = 12;
9781 if (PPC_HA (off) != 0)
9782 size = 16;
9783 }
9784 else
9785 {
9786 size = 20;
9787 if (PPC_HA (off) != 0)
9788 size += 4;
9789
9790 if (PPC_HA (r2off) != 0)
9791 size += 4;
9792 }
9793 }
9794 else if (info->emitrelocations)
9795 {
9796 stub_entry->stub_sec->reloc_count += 1;
9797 stub_entry->stub_sec->flags |= SEC_RELOC;
9798 }
9799 }
9800
9801 stub_entry->stub_sec->size += size;
9802 return TRUE;
9803 }
9804
9805 /* Set up various things so that we can make a list of input sections
9806 for each output section included in the link. Returns -1 on error,
9807 0 when no stubs will be needed, and 1 on success. */
9808
9809 int
9810 ppc64_elf_setup_section_lists
9811 (struct bfd_link_info *info,
9812 asection *(*add_stub_section) (const char *, asection *),
9813 void (*layout_sections_again) (void))
9814 {
9815 bfd *input_bfd;
9816 int top_id, top_index, id;
9817 asection *section;
9818 asection **input_list;
9819 bfd_size_type amt;
9820 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9821
9822 if (htab == NULL)
9823 return -1;
9824 /* Stash our params away. */
9825 htab->add_stub_section = add_stub_section;
9826 htab->layout_sections_again = layout_sections_again;
9827
9828 if (htab->brlt == NULL)
9829 return 0;
9830
9831 /* Find the top input section id. */
9832 for (input_bfd = info->input_bfds, top_id = 3;
9833 input_bfd != NULL;
9834 input_bfd = input_bfd->link_next)
9835 {
9836 for (section = input_bfd->sections;
9837 section != NULL;
9838 section = section->next)
9839 {
9840 if (top_id < section->id)
9841 top_id = section->id;
9842 }
9843 }
9844
9845 htab->top_id = top_id;
9846 amt = sizeof (struct map_stub) * (top_id + 1);
9847 htab->stub_group = bfd_zmalloc (amt);
9848 if (htab->stub_group == NULL)
9849 return -1;
9850
9851 /* Set toc_off for com, und, abs and ind sections. */
9852 for (id = 0; id < 3; id++)
9853 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9854
9855 /* We can't use output_bfd->section_count here to find the top output
9856 section index as some sections may have been removed, and
9857 strip_excluded_output_sections doesn't renumber the indices. */
9858 for (section = info->output_bfd->sections, top_index = 0;
9859 section != NULL;
9860 section = section->next)
9861 {
9862 if (top_index < section->index)
9863 top_index = section->index;
9864 }
9865
9866 htab->top_index = top_index;
9867 amt = sizeof (asection *) * (top_index + 1);
9868 input_list = bfd_zmalloc (amt);
9869 htab->input_list = input_list;
9870 if (input_list == NULL)
9871 return -1;
9872
9873 return 1;
9874 }
9875
9876 /* Set up for first pass at multitoc partitioning. */
9877
9878 void
9879 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
9880 {
9881 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9882
9883 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
9884 htab->toc_curr = elf_gp (info->output_bfd);
9885 htab->toc_bfd = NULL;
9886 htab->toc_first_sec = NULL;
9887 }
9888
9889 /* The linker repeatedly calls this function for each TOC input section
9890 and linker generated GOT section. Group input bfds such that the toc
9891 within a group is less than 64k in size. */
9892
9893 bfd_boolean
9894 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9895 {
9896 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9897 bfd_vma addr, off, limit;
9898
9899 if (htab == NULL)
9900 return FALSE;
9901
9902 if (!htab->second_toc_pass)
9903 {
9904 /* Keep track of the first .toc or .got section for this input bfd. */
9905 if (htab->toc_bfd != isec->owner)
9906 {
9907 htab->toc_bfd = isec->owner;
9908 htab->toc_first_sec = isec;
9909 }
9910
9911 addr = isec->output_offset + isec->output_section->vma;
9912 off = addr - htab->toc_curr;
9913 limit = 0x80008000;
9914 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
9915 limit = 0x10000;
9916 if (off + isec->size > limit)
9917 {
9918 addr = (htab->toc_first_sec->output_offset
9919 + htab->toc_first_sec->output_section->vma);
9920 htab->toc_curr = addr;
9921 }
9922
9923 /* toc_curr is the base address of this toc group. Set elf_gp
9924 for the input section to be the offset relative to the
9925 output toc base plus 0x8000. Making the input elf_gp an
9926 offset allows us to move the toc as a whole without
9927 recalculating input elf_gp. */
9928 off = htab->toc_curr - elf_gp (isec->output_section->owner);
9929 off += TOC_BASE_OFF;
9930
9931 /* Die if someone uses a linker script that doesn't keep input
9932 file .toc and .got together. */
9933 if (elf_gp (isec->owner) != 0
9934 && elf_gp (isec->owner) != off)
9935 return FALSE;
9936
9937 elf_gp (isec->owner) = off;
9938 return TRUE;
9939 }
9940
9941 /* During the second pass toc_first_sec points to the start of
9942 a toc group, and toc_curr is used to track the old elf_gp.
9943 We use toc_bfd to ensure we only look at each bfd once. */
9944 if (htab->toc_bfd == isec->owner)
9945 return TRUE;
9946 htab->toc_bfd = isec->owner;
9947
9948 if (htab->toc_first_sec == NULL
9949 || htab->toc_curr != elf_gp (isec->owner))
9950 {
9951 htab->toc_curr = elf_gp (isec->owner);
9952 htab->toc_first_sec = isec;
9953 }
9954 addr = (htab->toc_first_sec->output_offset
9955 + htab->toc_first_sec->output_section->vma);
9956 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
9957 elf_gp (isec->owner) = off;
9958
9959 return TRUE;
9960 }
9961
9962 /* Called via elf_link_hash_traverse to merge GOT entries for global
9963 symbol H. */
9964
9965 static bfd_boolean
9966 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9967 {
9968 if (h->root.type == bfd_link_hash_indirect)
9969 return TRUE;
9970
9971 if (h->root.type == bfd_link_hash_warning)
9972 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9973
9974 merge_got_entries (&h->got.glist);
9975
9976 return TRUE;
9977 }
9978
9979 /* Called via elf_link_hash_traverse to allocate GOT entries for global
9980 symbol H. */
9981
9982 static bfd_boolean
9983 reallocate_got (struct elf_link_hash_entry *h, void *inf)
9984 {
9985 struct got_entry *gent;
9986
9987 if (h->root.type == bfd_link_hash_indirect)
9988 return TRUE;
9989
9990 if (h->root.type == bfd_link_hash_warning)
9991 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9992
9993 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9994 if (!gent->is_indirect)
9995 allocate_got (h, (struct bfd_link_info *) inf, gent);
9996 return TRUE;
9997 }
9998
9999 /* Called on the first multitoc pass after the last call to
10000 ppc64_elf_next_toc_section. This function removes duplicate GOT
10001 entries. */
10002
10003 bfd_boolean
10004 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10005 {
10006 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10007 struct bfd *ibfd, *ibfd2;
10008 bfd_boolean done_something;
10009
10010 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10011
10012 if (!htab->do_multi_toc)
10013 return FALSE;
10014
10015 /* Merge global sym got entries within a toc group. */
10016 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10017
10018 /* And tlsld_got. */
10019 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10020 {
10021 struct got_entry *ent, *ent2;
10022
10023 if (!is_ppc64_elf (ibfd))
10024 continue;
10025
10026 ent = ppc64_tlsld_got (ibfd);
10027 if (!ent->is_indirect
10028 && ent->got.offset != (bfd_vma) -1)
10029 {
10030 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10031 {
10032 if (!is_ppc64_elf (ibfd2))
10033 continue;
10034
10035 ent2 = ppc64_tlsld_got (ibfd2);
10036 if (!ent2->is_indirect
10037 && ent2->got.offset != (bfd_vma) -1
10038 && elf_gp (ibfd2) == elf_gp (ibfd))
10039 {
10040 ent2->is_indirect = TRUE;
10041 ent2->got.ent = ent;
10042 }
10043 }
10044 }
10045 }
10046
10047 /* Zap sizes of got sections. */
10048 htab->reliplt->rawsize = htab->reliplt->size;
10049 htab->reliplt->size -= htab->got_reli_size;
10050 htab->got_reli_size = 0;
10051
10052 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10053 {
10054 asection *got, *relgot;
10055
10056 if (!is_ppc64_elf (ibfd))
10057 continue;
10058
10059 got = ppc64_elf_tdata (ibfd)->got;
10060 if (got != NULL)
10061 {
10062 got->rawsize = got->size;
10063 got->size = 0;
10064 relgot = ppc64_elf_tdata (ibfd)->relgot;
10065 relgot->rawsize = relgot->size;
10066 relgot->size = 0;
10067 }
10068 }
10069
10070 /* Now reallocate the got, local syms first. We don't need to
10071 allocate section contents again since we never increase size. */
10072 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10073 {
10074 struct got_entry **lgot_ents;
10075 struct got_entry **end_lgot_ents;
10076 struct plt_entry **local_plt;
10077 struct plt_entry **end_local_plt;
10078 unsigned char *lgot_masks;
10079 bfd_size_type locsymcount;
10080 Elf_Internal_Shdr *symtab_hdr;
10081 asection *s, *srel;
10082
10083 if (!is_ppc64_elf (ibfd))
10084 continue;
10085
10086 lgot_ents = elf_local_got_ents (ibfd);
10087 if (!lgot_ents)
10088 continue;
10089
10090 symtab_hdr = &elf_symtab_hdr (ibfd);
10091 locsymcount = symtab_hdr->sh_info;
10092 end_lgot_ents = lgot_ents + locsymcount;
10093 local_plt = (struct plt_entry **) end_lgot_ents;
10094 end_local_plt = local_plt + locsymcount;
10095 lgot_masks = (unsigned char *) end_local_plt;
10096 s = ppc64_elf_tdata (ibfd)->got;
10097 srel = ppc64_elf_tdata (ibfd)->relgot;
10098 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10099 {
10100 struct got_entry *ent;
10101
10102 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10103 {
10104 unsigned int num = 1;
10105 ent->got.offset = s->size;
10106 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10107 num = 2;
10108 s->size += num * 8;
10109 if (info->shared)
10110 srel->size += num * sizeof (Elf64_External_Rela);
10111 else if ((*lgot_masks & PLT_IFUNC) != 0)
10112 {
10113 htab->reliplt->size
10114 += num * sizeof (Elf64_External_Rela);
10115 htab->got_reli_size
10116 += num * sizeof (Elf64_External_Rela);
10117 }
10118 }
10119 }
10120 }
10121
10122 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10123
10124 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10125 {
10126 struct got_entry *ent;
10127
10128 if (!is_ppc64_elf (ibfd))
10129 continue;
10130
10131 ent = ppc64_tlsld_got (ibfd);
10132 if (!ent->is_indirect
10133 && ent->got.offset != (bfd_vma) -1)
10134 {
10135 asection *s = ppc64_elf_tdata (ibfd)->got;
10136 ent->got.offset = s->size;
10137 s->size += 16;
10138 if (info->shared)
10139 {
10140 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10141 srel->size += sizeof (Elf64_External_Rela);
10142 }
10143 }
10144 }
10145
10146 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10147 if (!done_something)
10148 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10149 {
10150 asection *got;
10151
10152 if (!is_ppc64_elf (ibfd))
10153 continue;
10154
10155 got = ppc64_elf_tdata (ibfd)->got;
10156 if (got != NULL)
10157 {
10158 done_something = got->rawsize != got->size;
10159 if (done_something)
10160 break;
10161 }
10162 }
10163
10164 if (done_something)
10165 (*htab->layout_sections_again) ();
10166
10167 /* Set up for second pass over toc sections to recalculate elf_gp
10168 on input sections. */
10169 htab->toc_bfd = NULL;
10170 htab->toc_first_sec = NULL;
10171 htab->second_toc_pass = TRUE;
10172 return done_something;
10173 }
10174
10175 /* Called after second pass of multitoc partitioning. */
10176
10177 void
10178 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10179 {
10180 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10181
10182 /* After the second pass, toc_curr tracks the TOC offset used
10183 for code sections below in ppc64_elf_next_input_section. */
10184 htab->toc_curr = TOC_BASE_OFF;
10185 }
10186
10187 /* No toc references were found in ISEC. If the code in ISEC makes no
10188 calls, then there's no need to use toc adjusting stubs when branching
10189 into ISEC. Actually, indirect calls from ISEC are OK as they will
10190 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10191 needed, and 2 if a cyclical call-graph was found but no other reason
10192 for a stub was detected. If called from the top level, a return of
10193 2 means the same as a return of 0. */
10194
10195 static int
10196 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10197 {
10198 int ret;
10199
10200 /* Mark this section as checked. */
10201 isec->call_check_done = 1;
10202
10203 /* We know none of our code bearing sections will need toc stubs. */
10204 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10205 return 0;
10206
10207 if (isec->size == 0)
10208 return 0;
10209
10210 if (isec->output_section == NULL)
10211 return 0;
10212
10213 ret = 0;
10214 if (isec->reloc_count != 0)
10215 {
10216 Elf_Internal_Rela *relstart, *rel;
10217 Elf_Internal_Sym *local_syms;
10218 struct ppc_link_hash_table *htab;
10219
10220 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10221 info->keep_memory);
10222 if (relstart == NULL)
10223 return -1;
10224
10225 /* Look for branches to outside of this section. */
10226 local_syms = NULL;
10227 htab = ppc_hash_table (info);
10228 if (htab == NULL)
10229 return -1;
10230
10231 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10232 {
10233 enum elf_ppc64_reloc_type r_type;
10234 unsigned long r_symndx;
10235 struct elf_link_hash_entry *h;
10236 struct ppc_link_hash_entry *eh;
10237 Elf_Internal_Sym *sym;
10238 asection *sym_sec;
10239 struct _opd_sec_data *opd;
10240 bfd_vma sym_value;
10241 bfd_vma dest;
10242
10243 r_type = ELF64_R_TYPE (rel->r_info);
10244 if (r_type != R_PPC64_REL24
10245 && r_type != R_PPC64_REL14
10246 && r_type != R_PPC64_REL14_BRTAKEN
10247 && r_type != R_PPC64_REL14_BRNTAKEN)
10248 continue;
10249
10250 r_symndx = ELF64_R_SYM (rel->r_info);
10251 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10252 isec->owner))
10253 {
10254 ret = -1;
10255 break;
10256 }
10257
10258 /* Calls to dynamic lib functions go through a plt call stub
10259 that uses r2. */
10260 eh = (struct ppc_link_hash_entry *) h;
10261 if (eh != NULL
10262 && (eh->elf.plt.plist != NULL
10263 || (eh->oh != NULL
10264 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10265 {
10266 ret = 1;
10267 break;
10268 }
10269
10270 if (sym_sec == NULL)
10271 /* Ignore other undefined symbols. */
10272 continue;
10273
10274 /* Assume branches to other sections not included in the
10275 link need stubs too, to cover -R and absolute syms. */
10276 if (sym_sec->output_section == NULL)
10277 {
10278 ret = 1;
10279 break;
10280 }
10281
10282 if (h == NULL)
10283 sym_value = sym->st_value;
10284 else
10285 {
10286 if (h->root.type != bfd_link_hash_defined
10287 && h->root.type != bfd_link_hash_defweak)
10288 abort ();
10289 sym_value = h->root.u.def.value;
10290 }
10291 sym_value += rel->r_addend;
10292
10293 /* If this branch reloc uses an opd sym, find the code section. */
10294 opd = get_opd_info (sym_sec);
10295 if (opd != NULL)
10296 {
10297 if (h == NULL && opd->adjust != NULL)
10298 {
10299 long adjust;
10300
10301 adjust = opd->adjust[sym->st_value / 8];
10302 if (adjust == -1)
10303 /* Assume deleted functions won't ever be called. */
10304 continue;
10305 sym_value += adjust;
10306 }
10307
10308 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10309 if (dest == (bfd_vma) -1)
10310 continue;
10311 }
10312 else
10313 dest = (sym_value
10314 + sym_sec->output_offset
10315 + sym_sec->output_section->vma);
10316
10317 /* Ignore branch to self. */
10318 if (sym_sec == isec)
10319 continue;
10320
10321 /* If the called function uses the toc, we need a stub. */
10322 if (sym_sec->has_toc_reloc
10323 || sym_sec->makes_toc_func_call)
10324 {
10325 ret = 1;
10326 break;
10327 }
10328
10329 /* Assume any branch that needs a long branch stub might in fact
10330 need a plt_branch stub. A plt_branch stub uses r2. */
10331 else if (dest - (isec->output_offset
10332 + isec->output_section->vma
10333 + rel->r_offset) + (1 << 25) >= (2 << 25))
10334 {
10335 ret = 1;
10336 break;
10337 }
10338
10339 /* If calling back to a section in the process of being
10340 tested, we can't say for sure that no toc adjusting stubs
10341 are needed, so don't return zero. */
10342 else if (sym_sec->call_check_in_progress)
10343 ret = 2;
10344
10345 /* Branches to another section that itself doesn't have any TOC
10346 references are OK. Recursively call ourselves to check. */
10347 else if (!sym_sec->call_check_done)
10348 {
10349 int recur;
10350
10351 /* Mark current section as indeterminate, so that other
10352 sections that call back to current won't be marked as
10353 known. */
10354 isec->call_check_in_progress = 1;
10355 recur = toc_adjusting_stub_needed (info, sym_sec);
10356 isec->call_check_in_progress = 0;
10357
10358 if (recur != 0)
10359 {
10360 ret = recur;
10361 if (recur != 2)
10362 break;
10363 }
10364 }
10365 }
10366
10367 if (local_syms != NULL
10368 && (elf_symtab_hdr (isec->owner).contents
10369 != (unsigned char *) local_syms))
10370 free (local_syms);
10371 if (elf_section_data (isec)->relocs != relstart)
10372 free (relstart);
10373 }
10374
10375 if ((ret & 1) == 0
10376 && isec->map_head.s != NULL
10377 && (strcmp (isec->output_section->name, ".init") == 0
10378 || strcmp (isec->output_section->name, ".fini") == 0))
10379 {
10380 if (isec->map_head.s->has_toc_reloc
10381 || isec->map_head.s->makes_toc_func_call)
10382 ret = 1;
10383 else if (!isec->map_head.s->call_check_done)
10384 {
10385 int recur;
10386 isec->call_check_in_progress = 1;
10387 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10388 isec->call_check_in_progress = 0;
10389 if (recur != 0)
10390 ret = recur;
10391 }
10392 }
10393
10394 if (ret == 1)
10395 isec->makes_toc_func_call = 1;
10396
10397 return ret;
10398 }
10399
10400 /* The linker repeatedly calls this function for each input section,
10401 in the order that input sections are linked into output sections.
10402 Build lists of input sections to determine groupings between which
10403 we may insert linker stubs. */
10404
10405 bfd_boolean
10406 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10407 {
10408 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10409
10410 if (htab == NULL)
10411 return FALSE;
10412
10413 if ((isec->output_section->flags & SEC_CODE) != 0
10414 && isec->output_section->index <= htab->top_index)
10415 {
10416 asection **list = htab->input_list + isec->output_section->index;
10417 /* Steal the link_sec pointer for our list. */
10418 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10419 /* This happens to make the list in reverse order,
10420 which is what we want. */
10421 PREV_SEC (isec) = *list;
10422 *list = isec;
10423 }
10424
10425 if (htab->multi_toc_needed)
10426 {
10427 /* If a code section has a function that uses the TOC then we need
10428 to use the right TOC (obviously). Also, make sure that .opd gets
10429 the correct TOC value for R_PPC64_TOC relocs that don't have or
10430 can't find their function symbol (shouldn't ever happen now).
10431 Also specially treat .fixup for the linux kernel. .fixup
10432 contains branches, but only back to the function that hit an
10433 exception. */
10434 if (isec->has_toc_reloc
10435 || (isec->flags & SEC_CODE) == 0
10436 || strcmp (isec->name, ".fixup") == 0)
10437 {
10438 if (elf_gp (isec->owner) != 0)
10439 htab->toc_curr = elf_gp (isec->owner);
10440 }
10441 else if (!isec->call_check_done
10442 && toc_adjusting_stub_needed (info, isec) < 0)
10443 return FALSE;
10444 }
10445
10446 /* Functions that don't use the TOC can belong in any TOC group.
10447 Use the last TOC base. This happens to make _init and _fini
10448 pasting work, because the fragments generally don't use the TOC. */
10449 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10450 return TRUE;
10451 }
10452
10453 /* Check that all .init and .fini sections use the same toc, if they
10454 have toc relocs. */
10455
10456 static bfd_boolean
10457 check_pasted_section (struct bfd_link_info *info, const char *name)
10458 {
10459 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10460
10461 if (o != NULL)
10462 {
10463 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10464 bfd_vma toc_off = 0;
10465 asection *i;
10466
10467 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10468 if (i->has_toc_reloc)
10469 {
10470 if (toc_off == 0)
10471 toc_off = htab->stub_group[i->id].toc_off;
10472 else if (toc_off != htab->stub_group[i->id].toc_off)
10473 return FALSE;
10474 }
10475 /* Make sure the whole pasted function uses the same toc offset. */
10476 if (toc_off != 0)
10477 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10478 htab->stub_group[i->id].toc_off = toc_off;
10479 }
10480 return TRUE;
10481 }
10482
10483 bfd_boolean
10484 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10485 {
10486 return (check_pasted_section (info, ".init")
10487 & check_pasted_section (info, ".fini"));
10488 }
10489
10490 /* See whether we can group stub sections together. Grouping stub
10491 sections may result in fewer stubs. More importantly, we need to
10492 put all .init* and .fini* stubs at the beginning of the .init or
10493 .fini output sections respectively, because glibc splits the
10494 _init and _fini functions into multiple parts. Putting a stub in
10495 the middle of a function is not a good idea. */
10496
10497 static void
10498 group_sections (struct ppc_link_hash_table *htab,
10499 bfd_size_type stub_group_size,
10500 bfd_boolean stubs_always_before_branch)
10501 {
10502 asection **list;
10503 bfd_size_type stub14_group_size;
10504 bfd_boolean suppress_size_errors;
10505
10506 suppress_size_errors = FALSE;
10507 stub14_group_size = stub_group_size;
10508 if (stub_group_size == 1)
10509 {
10510 /* Default values. */
10511 if (stubs_always_before_branch)
10512 {
10513 stub_group_size = 0x1e00000;
10514 stub14_group_size = 0x7800;
10515 }
10516 else
10517 {
10518 stub_group_size = 0x1c00000;
10519 stub14_group_size = 0x7000;
10520 }
10521 suppress_size_errors = TRUE;
10522 }
10523
10524 list = htab->input_list + htab->top_index;
10525 do
10526 {
10527 asection *tail = *list;
10528 while (tail != NULL)
10529 {
10530 asection *curr;
10531 asection *prev;
10532 bfd_size_type total;
10533 bfd_boolean big_sec;
10534 bfd_vma curr_toc;
10535
10536 curr = tail;
10537 total = tail->size;
10538 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
10539 ? stub14_group_size : stub_group_size);
10540 if (big_sec && !suppress_size_errors)
10541 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10542 tail->owner, tail);
10543 curr_toc = htab->stub_group[tail->id].toc_off;
10544
10545 while ((prev = PREV_SEC (curr)) != NULL
10546 && ((total += curr->output_offset - prev->output_offset)
10547 < (ppc64_elf_section_data (prev)->has_14bit_branch
10548 ? stub14_group_size : stub_group_size))
10549 && htab->stub_group[prev->id].toc_off == curr_toc)
10550 curr = prev;
10551
10552 /* OK, the size from the start of CURR to the end is less
10553 than stub_group_size and thus can be handled by one stub
10554 section. (or the tail section is itself larger than
10555 stub_group_size, in which case we may be toast.) We
10556 should really be keeping track of the total size of stubs
10557 added here, as stubs contribute to the final output
10558 section size. That's a little tricky, and this way will
10559 only break if stubs added make the total size more than
10560 2^25, ie. for the default stub_group_size, if stubs total
10561 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10562 do
10563 {
10564 prev = PREV_SEC (tail);
10565 /* Set up this stub group. */
10566 htab->stub_group[tail->id].link_sec = curr;
10567 }
10568 while (tail != curr && (tail = prev) != NULL);
10569
10570 /* But wait, there's more! Input sections up to stub_group_size
10571 bytes before the stub section can be handled by it too.
10572 Don't do this if we have a really large section after the
10573 stubs, as adding more stubs increases the chance that
10574 branches may not reach into the stub section. */
10575 if (!stubs_always_before_branch && !big_sec)
10576 {
10577 total = 0;
10578 while (prev != NULL
10579 && ((total += tail->output_offset - prev->output_offset)
10580 < (ppc64_elf_section_data (prev)->has_14bit_branch
10581 ? stub14_group_size : stub_group_size))
10582 && htab->stub_group[prev->id].toc_off == curr_toc)
10583 {
10584 tail = prev;
10585 prev = PREV_SEC (tail);
10586 htab->stub_group[tail->id].link_sec = curr;
10587 }
10588 }
10589 tail = prev;
10590 }
10591 }
10592 while (list-- != htab->input_list);
10593 free (htab->input_list);
10594 #undef PREV_SEC
10595 }
10596
10597 /* Determine and set the size of the stub section for a final link.
10598
10599 The basic idea here is to examine all the relocations looking for
10600 PC-relative calls to a target that is unreachable with a "bl"
10601 instruction. */
10602
10603 bfd_boolean
10604 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10605 {
10606 bfd_size_type stub_group_size;
10607 bfd_boolean stubs_always_before_branch;
10608 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10609
10610 if (htab == NULL)
10611 return FALSE;
10612
10613 stubs_always_before_branch = group_size < 0;
10614 if (group_size < 0)
10615 stub_group_size = -group_size;
10616 else
10617 stub_group_size = group_size;
10618
10619 group_sections (htab, stub_group_size, stubs_always_before_branch);
10620
10621 while (1)
10622 {
10623 bfd *input_bfd;
10624 unsigned int bfd_indx;
10625 asection *stub_sec;
10626
10627 htab->stub_iteration += 1;
10628
10629 for (input_bfd = info->input_bfds, bfd_indx = 0;
10630 input_bfd != NULL;
10631 input_bfd = input_bfd->link_next, bfd_indx++)
10632 {
10633 Elf_Internal_Shdr *symtab_hdr;
10634 asection *section;
10635 Elf_Internal_Sym *local_syms = NULL;
10636
10637 if (!is_ppc64_elf (input_bfd))
10638 continue;
10639
10640 /* We'll need the symbol table in a second. */
10641 symtab_hdr = &elf_symtab_hdr (input_bfd);
10642 if (symtab_hdr->sh_info == 0)
10643 continue;
10644
10645 /* Walk over each section attached to the input bfd. */
10646 for (section = input_bfd->sections;
10647 section != NULL;
10648 section = section->next)
10649 {
10650 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10651
10652 /* If there aren't any relocs, then there's nothing more
10653 to do. */
10654 if ((section->flags & SEC_RELOC) == 0
10655 || (section->flags & SEC_ALLOC) == 0
10656 || (section->flags & SEC_LOAD) == 0
10657 || (section->flags & SEC_CODE) == 0
10658 || section->reloc_count == 0)
10659 continue;
10660
10661 /* If this section is a link-once section that will be
10662 discarded, then don't create any stubs. */
10663 if (section->output_section == NULL
10664 || section->output_section->owner != info->output_bfd)
10665 continue;
10666
10667 /* Get the relocs. */
10668 internal_relocs
10669 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10670 info->keep_memory);
10671 if (internal_relocs == NULL)
10672 goto error_ret_free_local;
10673
10674 /* Now examine each relocation. */
10675 irela = internal_relocs;
10676 irelaend = irela + section->reloc_count;
10677 for (; irela < irelaend; irela++)
10678 {
10679 enum elf_ppc64_reloc_type r_type;
10680 unsigned int r_indx;
10681 enum ppc_stub_type stub_type;
10682 struct ppc_stub_hash_entry *stub_entry;
10683 asection *sym_sec, *code_sec;
10684 bfd_vma sym_value, code_value;
10685 bfd_vma destination;
10686 bfd_boolean ok_dest;
10687 struct ppc_link_hash_entry *hash;
10688 struct ppc_link_hash_entry *fdh;
10689 struct elf_link_hash_entry *h;
10690 Elf_Internal_Sym *sym;
10691 char *stub_name;
10692 const asection *id_sec;
10693 struct _opd_sec_data *opd;
10694 struct plt_entry *plt_ent;
10695
10696 r_type = ELF64_R_TYPE (irela->r_info);
10697 r_indx = ELF64_R_SYM (irela->r_info);
10698
10699 if (r_type >= R_PPC64_max)
10700 {
10701 bfd_set_error (bfd_error_bad_value);
10702 goto error_ret_free_internal;
10703 }
10704
10705 /* Only look for stubs on branch instructions. */
10706 if (r_type != R_PPC64_REL24
10707 && r_type != R_PPC64_REL14
10708 && r_type != R_PPC64_REL14_BRTAKEN
10709 && r_type != R_PPC64_REL14_BRNTAKEN)
10710 continue;
10711
10712 /* Now determine the call target, its name, value,
10713 section. */
10714 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10715 r_indx, input_bfd))
10716 goto error_ret_free_internal;
10717 hash = (struct ppc_link_hash_entry *) h;
10718
10719 ok_dest = FALSE;
10720 fdh = NULL;
10721 sym_value = 0;
10722 if (hash == NULL)
10723 {
10724 sym_value = sym->st_value;
10725 ok_dest = TRUE;
10726 }
10727 else if (hash->elf.root.type == bfd_link_hash_defined
10728 || hash->elf.root.type == bfd_link_hash_defweak)
10729 {
10730 sym_value = hash->elf.root.u.def.value;
10731 if (sym_sec->output_section != NULL)
10732 ok_dest = TRUE;
10733 }
10734 else if (hash->elf.root.type == bfd_link_hash_undefweak
10735 || hash->elf.root.type == bfd_link_hash_undefined)
10736 {
10737 /* Recognise an old ABI func code entry sym, and
10738 use the func descriptor sym instead if it is
10739 defined. */
10740 if (hash->elf.root.root.string[0] == '.'
10741 && (fdh = lookup_fdh (hash, htab)) != NULL)
10742 {
10743 if (fdh->elf.root.type == bfd_link_hash_defined
10744 || fdh->elf.root.type == bfd_link_hash_defweak)
10745 {
10746 sym_sec = fdh->elf.root.u.def.section;
10747 sym_value = fdh->elf.root.u.def.value;
10748 if (sym_sec->output_section != NULL)
10749 ok_dest = TRUE;
10750 }
10751 else
10752 fdh = NULL;
10753 }
10754 }
10755 else
10756 {
10757 bfd_set_error (bfd_error_bad_value);
10758 goto error_ret_free_internal;
10759 }
10760
10761 destination = 0;
10762 if (ok_dest)
10763 {
10764 sym_value += irela->r_addend;
10765 destination = (sym_value
10766 + sym_sec->output_offset
10767 + sym_sec->output_section->vma);
10768 }
10769
10770 code_sec = sym_sec;
10771 code_value = sym_value;
10772 opd = get_opd_info (sym_sec);
10773 if (opd != NULL)
10774 {
10775 bfd_vma dest;
10776
10777 if (hash == NULL && opd->adjust != NULL)
10778 {
10779 long adjust = opd->adjust[sym_value / 8];
10780 if (adjust == -1)
10781 continue;
10782 code_value += adjust;
10783 sym_value += adjust;
10784 }
10785 dest = opd_entry_value (sym_sec, sym_value,
10786 &code_sec, &code_value);
10787 if (dest != (bfd_vma) -1)
10788 {
10789 destination = dest;
10790 if (fdh != NULL)
10791 {
10792 /* Fixup old ABI sym to point at code
10793 entry. */
10794 hash->elf.root.type = bfd_link_hash_defweak;
10795 hash->elf.root.u.def.section = code_sec;
10796 hash->elf.root.u.def.value = code_value;
10797 }
10798 }
10799 }
10800
10801 /* Determine what (if any) linker stub is needed. */
10802 plt_ent = NULL;
10803 stub_type = ppc_type_of_stub (section, irela, &hash,
10804 &plt_ent, destination);
10805
10806 if (stub_type != ppc_stub_plt_call)
10807 {
10808 /* Check whether we need a TOC adjusting stub.
10809 Since the linker pastes together pieces from
10810 different object files when creating the
10811 _init and _fini functions, it may be that a
10812 call to what looks like a local sym is in
10813 fact a call needing a TOC adjustment. */
10814 if (code_sec != NULL
10815 && code_sec->output_section != NULL
10816 && (htab->stub_group[code_sec->id].toc_off
10817 != htab->stub_group[section->id].toc_off)
10818 && (code_sec->has_toc_reloc
10819 || code_sec->makes_toc_func_call))
10820 stub_type = ppc_stub_long_branch_r2off;
10821 }
10822
10823 if (stub_type == ppc_stub_none)
10824 continue;
10825
10826 /* __tls_get_addr calls might be eliminated. */
10827 if (stub_type != ppc_stub_plt_call
10828 && hash != NULL
10829 && (hash == htab->tls_get_addr
10830 || hash == htab->tls_get_addr_fd)
10831 && section->has_tls_reloc
10832 && irela != internal_relocs)
10833 {
10834 /* Get tls info. */
10835 unsigned char *tls_mask;
10836
10837 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10838 irela - 1, input_bfd))
10839 goto error_ret_free_internal;
10840 if (*tls_mask != 0)
10841 continue;
10842 }
10843
10844 /* Support for grouping stub sections. */
10845 id_sec = htab->stub_group[section->id].link_sec;
10846
10847 /* Get the name of this stub. */
10848 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10849 if (!stub_name)
10850 goto error_ret_free_internal;
10851
10852 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10853 stub_name, FALSE, FALSE);
10854 if (stub_entry != NULL)
10855 {
10856 /* The proper stub has already been created. */
10857 free (stub_name);
10858 continue;
10859 }
10860
10861 stub_entry = ppc_add_stub (stub_name, section, htab);
10862 if (stub_entry == NULL)
10863 {
10864 free (stub_name);
10865 error_ret_free_internal:
10866 if (elf_section_data (section)->relocs == NULL)
10867 free (internal_relocs);
10868 error_ret_free_local:
10869 if (local_syms != NULL
10870 && (symtab_hdr->contents
10871 != (unsigned char *) local_syms))
10872 free (local_syms);
10873 return FALSE;
10874 }
10875
10876 stub_entry->stub_type = stub_type;
10877 if (stub_type != ppc_stub_plt_call)
10878 {
10879 stub_entry->target_value = code_value;
10880 stub_entry->target_section = code_sec;
10881 }
10882 else
10883 {
10884 stub_entry->target_value = sym_value;
10885 stub_entry->target_section = sym_sec;
10886 }
10887 stub_entry->h = hash;
10888 stub_entry->plt_ent = plt_ent;
10889 stub_entry->addend = irela->r_addend;
10890
10891 if (stub_entry->h != NULL)
10892 htab->stub_globals += 1;
10893 }
10894
10895 /* We're done with the internal relocs, free them. */
10896 if (elf_section_data (section)->relocs != internal_relocs)
10897 free (internal_relocs);
10898 }
10899
10900 if (local_syms != NULL
10901 && symtab_hdr->contents != (unsigned char *) local_syms)
10902 {
10903 if (!info->keep_memory)
10904 free (local_syms);
10905 else
10906 symtab_hdr->contents = (unsigned char *) local_syms;
10907 }
10908 }
10909
10910 /* We may have added some stubs. Find out the new size of the
10911 stub sections. */
10912 for (stub_sec = htab->stub_bfd->sections;
10913 stub_sec != NULL;
10914 stub_sec = stub_sec->next)
10915 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10916 {
10917 stub_sec->rawsize = stub_sec->size;
10918 stub_sec->size = 0;
10919 stub_sec->reloc_count = 0;
10920 stub_sec->flags &= ~SEC_RELOC;
10921 }
10922
10923 htab->brlt->size = 0;
10924 htab->brlt->reloc_count = 0;
10925 htab->brlt->flags &= ~SEC_RELOC;
10926 if (htab->relbrlt != NULL)
10927 htab->relbrlt->size = 0;
10928
10929 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
10930
10931 if (info->emitrelocations
10932 && htab->glink != NULL && htab->glink->size != 0)
10933 {
10934 htab->glink->reloc_count = 1;
10935 htab->glink->flags |= SEC_RELOC;
10936 }
10937
10938 for (stub_sec = htab->stub_bfd->sections;
10939 stub_sec != NULL;
10940 stub_sec = stub_sec->next)
10941 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10942 && stub_sec->rawsize != stub_sec->size)
10943 break;
10944
10945 /* Exit from this loop when no stubs have been added, and no stubs
10946 have changed size. */
10947 if (stub_sec == NULL)
10948 break;
10949
10950 /* Ask the linker to do its stuff. */
10951 (*htab->layout_sections_again) ();
10952 }
10953
10954 /* It would be nice to strip htab->brlt from the output if the
10955 section is empty, but it's too late. If we strip sections here,
10956 the dynamic symbol table is corrupted since the section symbol
10957 for the stripped section isn't written. */
10958
10959 return TRUE;
10960 }
10961
10962 /* Called after we have determined section placement. If sections
10963 move, we'll be called again. Provide a value for TOCstart. */
10964
10965 bfd_vma
10966 ppc64_elf_toc (bfd *obfd)
10967 {
10968 asection *s;
10969 bfd_vma TOCstart;
10970
10971 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
10972 order. The TOC starts where the first of these sections starts. */
10973 s = bfd_get_section_by_name (obfd, ".got");
10974 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10975 s = bfd_get_section_by_name (obfd, ".toc");
10976 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10977 s = bfd_get_section_by_name (obfd, ".tocbss");
10978 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10979 s = bfd_get_section_by_name (obfd, ".plt");
10980 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10981 {
10982 /* This may happen for
10983 o references to TOC base (SYM@toc / TOC[tc0]) without a
10984 .toc directive
10985 o bad linker script
10986 o --gc-sections and empty TOC sections
10987
10988 FIXME: Warn user? */
10989
10990 /* Look for a likely section. We probably won't even be
10991 using TOCstart. */
10992 for (s = obfd->sections; s != NULL; s = s->next)
10993 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
10994 | SEC_EXCLUDE))
10995 == (SEC_ALLOC | SEC_SMALL_DATA))
10996 break;
10997 if (s == NULL)
10998 for (s = obfd->sections; s != NULL; s = s->next)
10999 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11000 == (SEC_ALLOC | SEC_SMALL_DATA))
11001 break;
11002 if (s == NULL)
11003 for (s = obfd->sections; s != NULL; s = s->next)
11004 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11005 == SEC_ALLOC)
11006 break;
11007 if (s == NULL)
11008 for (s = obfd->sections; s != NULL; s = s->next)
11009 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11010 break;
11011 }
11012
11013 TOCstart = 0;
11014 if (s != NULL)
11015 TOCstart = s->output_section->vma + s->output_offset;
11016
11017 return TOCstart;
11018 }
11019
11020 /* Build all the stubs associated with the current output file.
11021 The stubs are kept in a hash table attached to the main linker
11022 hash table. This function is called via gldelf64ppc_finish. */
11023
11024 bfd_boolean
11025 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11026 struct bfd_link_info *info,
11027 char **stats)
11028 {
11029 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11030 asection *stub_sec;
11031 bfd_byte *p;
11032 int stub_sec_count = 0;
11033
11034 if (htab == NULL)
11035 return FALSE;
11036
11037 htab->emit_stub_syms = emit_stub_syms;
11038
11039 /* Allocate memory to hold the linker stubs. */
11040 for (stub_sec = htab->stub_bfd->sections;
11041 stub_sec != NULL;
11042 stub_sec = stub_sec->next)
11043 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11044 && stub_sec->size != 0)
11045 {
11046 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11047 if (stub_sec->contents == NULL)
11048 return FALSE;
11049 /* We want to check that built size is the same as calculated
11050 size. rawsize is a convenient location to use. */
11051 stub_sec->rawsize = stub_sec->size;
11052 stub_sec->size = 0;
11053 }
11054
11055 if (htab->glink != NULL && htab->glink->size != 0)
11056 {
11057 unsigned int indx;
11058 bfd_vma plt0;
11059
11060 /* Build the .glink plt call stub. */
11061 if (htab->emit_stub_syms)
11062 {
11063 struct elf_link_hash_entry *h;
11064 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11065 TRUE, FALSE, FALSE);
11066 if (h == NULL)
11067 return FALSE;
11068 if (h->root.type == bfd_link_hash_new)
11069 {
11070 h->root.type = bfd_link_hash_defined;
11071 h->root.u.def.section = htab->glink;
11072 h->root.u.def.value = 8;
11073 h->ref_regular = 1;
11074 h->def_regular = 1;
11075 h->ref_regular_nonweak = 1;
11076 h->forced_local = 1;
11077 h->non_elf = 0;
11078 }
11079 }
11080 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11081 if (info->emitrelocations)
11082 {
11083 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11084 if (r == NULL)
11085 return FALSE;
11086 r->r_offset = (htab->glink->output_offset
11087 + htab->glink->output_section->vma);
11088 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11089 r->r_addend = plt0;
11090 }
11091 p = htab->glink->contents;
11092 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11093 bfd_put_64 (htab->glink->owner, plt0, p);
11094 p += 8;
11095 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11096 p += 4;
11097 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11098 p += 4;
11099 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11100 p += 4;
11101 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11102 p += 4;
11103 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11104 p += 4;
11105 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11106 p += 4;
11107 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11108 p += 4;
11109 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11110 p += 4;
11111 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11112 p += 4;
11113 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11114 p += 4;
11115 bfd_put_32 (htab->glink->owner, BCTR, p);
11116 p += 4;
11117 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11118 {
11119 bfd_put_32 (htab->glink->owner, NOP, p);
11120 p += 4;
11121 }
11122
11123 /* Build the .glink lazy link call stubs. */
11124 indx = 0;
11125 while (p < htab->glink->contents + htab->glink->size)
11126 {
11127 if (indx < 0x8000)
11128 {
11129 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11130 p += 4;
11131 }
11132 else
11133 {
11134 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11135 p += 4;
11136 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11137 p += 4;
11138 }
11139 bfd_put_32 (htab->glink->owner,
11140 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11141 indx++;
11142 p += 4;
11143 }
11144 htab->glink->rawsize = p - htab->glink->contents;
11145 }
11146
11147 if (htab->brlt->size != 0)
11148 {
11149 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11150 htab->brlt->size);
11151 if (htab->brlt->contents == NULL)
11152 return FALSE;
11153 }
11154 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11155 {
11156 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11157 htab->relbrlt->size);
11158 if (htab->relbrlt->contents == NULL)
11159 return FALSE;
11160 }
11161
11162 /* Build the stubs as directed by the stub hash table. */
11163 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11164
11165 if (htab->relbrlt != NULL)
11166 htab->relbrlt->reloc_count = 0;
11167
11168 for (stub_sec = htab->stub_bfd->sections;
11169 stub_sec != NULL;
11170 stub_sec = stub_sec->next)
11171 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11172 {
11173 stub_sec_count += 1;
11174 if (stub_sec->rawsize != stub_sec->size)
11175 break;
11176 }
11177
11178 if (stub_sec != NULL
11179 || htab->glink->rawsize != htab->glink->size)
11180 {
11181 htab->stub_error = TRUE;
11182 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11183 }
11184
11185 if (htab->stub_error)
11186 return FALSE;
11187
11188 if (stats != NULL)
11189 {
11190 *stats = bfd_malloc (500);
11191 if (*stats == NULL)
11192 return FALSE;
11193
11194 sprintf (*stats, _("linker stubs in %u group%s\n"
11195 " branch %lu\n"
11196 " toc adjust %lu\n"
11197 " long branch %lu\n"
11198 " long toc adj %lu\n"
11199 " plt call %lu"),
11200 stub_sec_count,
11201 stub_sec_count == 1 ? "" : "s",
11202 htab->stub_count[ppc_stub_long_branch - 1],
11203 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11204 htab->stub_count[ppc_stub_plt_branch - 1],
11205 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11206 htab->stub_count[ppc_stub_plt_call - 1]);
11207 }
11208 return TRUE;
11209 }
11210
11211 /* This function undoes the changes made by add_symbol_adjust. */
11212
11213 static bfd_boolean
11214 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11215 {
11216 struct ppc_link_hash_entry *eh;
11217
11218 if (h->root.type == bfd_link_hash_indirect)
11219 return TRUE;
11220
11221 if (h->root.type == bfd_link_hash_warning)
11222 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11223
11224 eh = (struct ppc_link_hash_entry *) h;
11225 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11226 return TRUE;
11227
11228 eh->elf.root.type = bfd_link_hash_undefined;
11229 return TRUE;
11230 }
11231
11232 void
11233 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11234 {
11235 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11236
11237 if (htab != NULL)
11238 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11239 }
11240
11241 /* What to do when ld finds relocations against symbols defined in
11242 discarded sections. */
11243
11244 static unsigned int
11245 ppc64_elf_action_discarded (asection *sec)
11246 {
11247 if (strcmp (".opd", sec->name) == 0)
11248 return 0;
11249
11250 if (strcmp (".toc", sec->name) == 0)
11251 return 0;
11252
11253 if (strcmp (".toc1", sec->name) == 0)
11254 return 0;
11255
11256 return _bfd_elf_default_action_discarded (sec);
11257 }
11258
11259 /* REL points to a low-part reloc on a bigtoc instruction sequence.
11260 Find the matching high-part reloc instruction and verify that it
11261 is addis REG,r2,x. If so, return a pointer to the high-part reloc. */
11262
11263 static const Elf_Internal_Rela *
11264 ha_reloc_match (const Elf_Internal_Rela *relocs,
11265 const Elf_Internal_Rela *rel,
11266 unsigned int reg,
11267 const bfd *input_bfd,
11268 const bfd_byte *contents)
11269 {
11270 enum elf_ppc64_reloc_type r_type, r_type_ha;
11271 bfd_vma r_info_ha, r_addend;
11272
11273 r_type = ELF64_R_TYPE (rel->r_info);
11274 switch (r_type)
11275 {
11276 case R_PPC64_GOT_TLSLD16_LO:
11277 case R_PPC64_GOT_TLSGD16_LO:
11278 case R_PPC64_GOT_TPREL16_LO_DS:
11279 case R_PPC64_GOT_DTPREL16_LO_DS:
11280 case R_PPC64_GOT16_LO:
11281 case R_PPC64_TOC16_LO:
11282 r_type_ha = r_type + 2;
11283 break;
11284 case R_PPC64_GOT16_LO_DS:
11285 r_type_ha = R_PPC64_GOT16_HA;
11286 break;
11287 case R_PPC64_TOC16_LO_DS:
11288 r_type_ha = R_PPC64_TOC16_HA;
11289 break;
11290 default:
11291 abort ();
11292 }
11293 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11294 r_addend = rel->r_addend;
11295
11296 while (--rel >= relocs)
11297 if (rel->r_info == r_info_ha
11298 && rel->r_addend == r_addend)
11299 {
11300 const bfd_byte *p = contents + (rel->r_offset & ~3);
11301 unsigned int insn = bfd_get_32 (input_bfd, p);
11302 if ((insn & ((0x3f << 26) | (0x1f << 16)))
11303 == ((15u << 26) | (2 << 16)) /* addis rt,r2,x */
11304 && (insn & (0x1f << 21)) == (reg << 21))
11305 return rel;
11306 break;
11307 }
11308 return NULL;
11309 }
11310
11311 /* The RELOCATE_SECTION function is called by the ELF backend linker
11312 to handle the relocations for a section.
11313
11314 The relocs are always passed as Rela structures; if the section
11315 actually uses Rel structures, the r_addend field will always be
11316 zero.
11317
11318 This function is responsible for adjust the section contents as
11319 necessary, and (if using Rela relocs and generating a
11320 relocatable output file) adjusting the reloc addend as
11321 necessary.
11322
11323 This function does not have to worry about setting the reloc
11324 address or the reloc symbol index.
11325
11326 LOCAL_SYMS is a pointer to the swapped in local symbols.
11327
11328 LOCAL_SECTIONS is an array giving the section in the input file
11329 corresponding to the st_shndx field of each local symbol.
11330
11331 The global hash table entry for the global symbols can be found
11332 via elf_sym_hashes (input_bfd).
11333
11334 When generating relocatable output, this function must handle
11335 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11336 going to be the section symbol corresponding to the output
11337 section, which means that the addend must be adjusted
11338 accordingly. */
11339
11340 static bfd_boolean
11341 ppc64_elf_relocate_section (bfd *output_bfd,
11342 struct bfd_link_info *info,
11343 bfd *input_bfd,
11344 asection *input_section,
11345 bfd_byte *contents,
11346 Elf_Internal_Rela *relocs,
11347 Elf_Internal_Sym *local_syms,
11348 asection **local_sections)
11349 {
11350 struct ppc_link_hash_table *htab;
11351 Elf_Internal_Shdr *symtab_hdr;
11352 struct elf_link_hash_entry **sym_hashes;
11353 Elf_Internal_Rela *rel;
11354 Elf_Internal_Rela *relend;
11355 Elf_Internal_Rela outrel;
11356 bfd_byte *loc;
11357 struct got_entry **local_got_ents;
11358 bfd_vma TOCstart;
11359 bfd_boolean ret = TRUE;
11360 bfd_boolean is_opd;
11361 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11362 bfd_boolean is_power4 = FALSE;
11363 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11364
11365 /* Initialize howto table if needed. */
11366 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11367 ppc_howto_init ();
11368
11369 htab = ppc_hash_table (info);
11370 if (htab == NULL)
11371 return FALSE;
11372
11373 /* Don't relocate stub sections. */
11374 if (input_section->owner == htab->stub_bfd)
11375 return TRUE;
11376
11377 BFD_ASSERT (is_ppc64_elf (input_bfd));
11378
11379 local_got_ents = elf_local_got_ents (input_bfd);
11380 TOCstart = elf_gp (output_bfd);
11381 symtab_hdr = &elf_symtab_hdr (input_bfd);
11382 sym_hashes = elf_sym_hashes (input_bfd);
11383 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11384
11385 rel = relocs;
11386 relend = relocs + input_section->reloc_count;
11387 for (; rel < relend; rel++)
11388 {
11389 enum elf_ppc64_reloc_type r_type;
11390 bfd_vma addend, orig_addend;
11391 bfd_reloc_status_type r;
11392 Elf_Internal_Sym *sym;
11393 asection *sec;
11394 struct elf_link_hash_entry *h_elf;
11395 struct ppc_link_hash_entry *h;
11396 struct ppc_link_hash_entry *fdh;
11397 const char *sym_name;
11398 unsigned long r_symndx, toc_symndx;
11399 bfd_vma toc_addend;
11400 unsigned char tls_mask, tls_gd, tls_type;
11401 unsigned char sym_type;
11402 bfd_vma relocation;
11403 bfd_boolean unresolved_reloc;
11404 bfd_boolean warned;
11405 unsigned int insn;
11406 bfd_vma mask;
11407 struct ppc_stub_hash_entry *stub_entry;
11408 bfd_vma max_br_offset;
11409 bfd_vma from;
11410
11411 r_type = ELF64_R_TYPE (rel->r_info);
11412 r_symndx = ELF64_R_SYM (rel->r_info);
11413
11414 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11415 symbol of the previous ADDR64 reloc. The symbol gives us the
11416 proper TOC base to use. */
11417 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11418 && rel != relocs
11419 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11420 && is_opd)
11421 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11422
11423 sym = NULL;
11424 sec = NULL;
11425 h_elf = NULL;
11426 sym_name = NULL;
11427 unresolved_reloc = FALSE;
11428 warned = FALSE;
11429 orig_addend = rel->r_addend;
11430
11431 if (r_symndx < symtab_hdr->sh_info)
11432 {
11433 /* It's a local symbol. */
11434 struct _opd_sec_data *opd;
11435
11436 sym = local_syms + r_symndx;
11437 sec = local_sections[r_symndx];
11438 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11439 sym_type = ELF64_ST_TYPE (sym->st_info);
11440 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11441 opd = get_opd_info (sec);
11442 if (opd != NULL && opd->adjust != NULL)
11443 {
11444 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11445 if (adjust == -1)
11446 relocation = 0;
11447 else
11448 {
11449 /* If this is a relocation against the opd section sym
11450 and we have edited .opd, adjust the reloc addend so
11451 that ld -r and ld --emit-relocs output is correct.
11452 If it is a reloc against some other .opd symbol,
11453 then the symbol value will be adjusted later. */
11454 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11455 rel->r_addend += adjust;
11456 else
11457 relocation += adjust;
11458 }
11459 }
11460 }
11461 else
11462 {
11463 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11464 r_symndx, symtab_hdr, sym_hashes,
11465 h_elf, sec, relocation,
11466 unresolved_reloc, warned);
11467 sym_name = h_elf->root.root.string;
11468 sym_type = h_elf->type;
11469 }
11470 h = (struct ppc_link_hash_entry *) h_elf;
11471
11472 if (sec != NULL && elf_discarded_section (sec))
11473 {
11474 /* For relocs against symbols from removed linkonce sections,
11475 or sections discarded by a linker script, we just want the
11476 section contents zeroed. Avoid any special processing. */
11477 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
11478 contents + rel->r_offset);
11479 rel->r_info = 0;
11480 rel->r_addend = 0;
11481 continue;
11482 }
11483
11484 if (info->relocatable)
11485 continue;
11486
11487 /* TLS optimizations. Replace instruction sequences and relocs
11488 based on information we collected in tls_optimize. We edit
11489 RELOCS so that --emit-relocs will output something sensible
11490 for the final instruction stream. */
11491 tls_mask = 0;
11492 tls_gd = 0;
11493 toc_symndx = 0;
11494 if (h != NULL)
11495 tls_mask = h->tls_mask;
11496 else if (local_got_ents != NULL)
11497 {
11498 struct plt_entry **local_plt = (struct plt_entry **)
11499 (local_got_ents + symtab_hdr->sh_info);
11500 unsigned char *lgot_masks = (unsigned char *)
11501 (local_plt + symtab_hdr->sh_info);
11502 tls_mask = lgot_masks[r_symndx];
11503 }
11504 if (tls_mask == 0
11505 && (r_type == R_PPC64_TLS
11506 || r_type == R_PPC64_TLSGD
11507 || r_type == R_PPC64_TLSLD))
11508 {
11509 /* Check for toc tls entries. */
11510 unsigned char *toc_tls;
11511
11512 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11513 &local_syms, rel, input_bfd))
11514 return FALSE;
11515
11516 if (toc_tls)
11517 tls_mask = *toc_tls;
11518 }
11519
11520 /* Check that tls relocs are used with tls syms, and non-tls
11521 relocs are used with non-tls syms. */
11522 if (r_symndx != 0
11523 && r_type != R_PPC64_NONE
11524 && (h == NULL
11525 || h->elf.root.type == bfd_link_hash_defined
11526 || h->elf.root.type == bfd_link_hash_defweak)
11527 && (IS_PPC64_TLS_RELOC (r_type)
11528 != (sym_type == STT_TLS
11529 || (sym_type == STT_SECTION
11530 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11531 {
11532 if (tls_mask != 0
11533 && (r_type == R_PPC64_TLS
11534 || r_type == R_PPC64_TLSGD
11535 || r_type == R_PPC64_TLSLD))
11536 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11537 ;
11538 else
11539 (*_bfd_error_handler)
11540 (!IS_PPC64_TLS_RELOC (r_type)
11541 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11542 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11543 input_bfd,
11544 input_section,
11545 (long) rel->r_offset,
11546 ppc64_elf_howto_table[r_type]->name,
11547 sym_name);
11548 }
11549
11550 /* Ensure reloc mapping code below stays sane. */
11551 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11552 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11553 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11554 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11555 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11556 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11557 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11558 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11559 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11560 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11561 abort ();
11562
11563 switch (r_type)
11564 {
11565 default:
11566 break;
11567
11568 case R_PPC64_TOC16:
11569 case R_PPC64_TOC16_LO:
11570 case R_PPC64_TOC16_DS:
11571 case R_PPC64_TOC16_LO_DS:
11572 {
11573 /* Check for toc tls entries. */
11574 unsigned char *toc_tls;
11575 int retval;
11576
11577 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11578 &local_syms, rel, input_bfd);
11579 if (retval == 0)
11580 return FALSE;
11581
11582 if (toc_tls)
11583 {
11584 tls_mask = *toc_tls;
11585 if (r_type == R_PPC64_TOC16_DS
11586 || r_type == R_PPC64_TOC16_LO_DS)
11587 {
11588 if (tls_mask != 0
11589 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11590 goto toctprel;
11591 }
11592 else
11593 {
11594 /* If we found a GD reloc pair, then we might be
11595 doing a GD->IE transition. */
11596 if (retval == 2)
11597 {
11598 tls_gd = TLS_TPRELGD;
11599 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11600 goto tls_ldgd_opt;
11601 }
11602 else if (retval == 3)
11603 {
11604 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11605 goto tls_ldgd_opt;
11606 }
11607 }
11608 }
11609 }
11610 break;
11611
11612 case R_PPC64_GOT_TPREL16_HI:
11613 case R_PPC64_GOT_TPREL16_HA:
11614 if (tls_mask != 0
11615 && (tls_mask & TLS_TPREL) == 0)
11616 {
11617 rel->r_offset -= d_offset;
11618 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11619 r_type = R_PPC64_NONE;
11620 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11621 }
11622 break;
11623
11624 case R_PPC64_GOT_TPREL16_DS:
11625 case R_PPC64_GOT_TPREL16_LO_DS:
11626 if (tls_mask != 0
11627 && (tls_mask & TLS_TPREL) == 0)
11628 {
11629 toctprel:
11630 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11631 insn &= 31 << 21;
11632 insn |= 0x3c0d0000; /* addis 0,13,0 */
11633 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11634 r_type = R_PPC64_TPREL16_HA;
11635 if (toc_symndx != 0)
11636 {
11637 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11638 rel->r_addend = toc_addend;
11639 /* We changed the symbol. Start over in order to
11640 get h, sym, sec etc. right. */
11641 rel--;
11642 continue;
11643 }
11644 else
11645 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11646 }
11647 break;
11648
11649 case R_PPC64_TLS:
11650 if (tls_mask != 0
11651 && (tls_mask & TLS_TPREL) == 0)
11652 {
11653 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11654 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11655 if (insn == 0)
11656 abort ();
11657 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11658 /* Was PPC64_TLS which sits on insn boundary, now
11659 PPC64_TPREL16_LO which is at low-order half-word. */
11660 rel->r_offset += d_offset;
11661 r_type = R_PPC64_TPREL16_LO;
11662 if (toc_symndx != 0)
11663 {
11664 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11665 rel->r_addend = toc_addend;
11666 /* We changed the symbol. Start over in order to
11667 get h, sym, sec etc. right. */
11668 rel--;
11669 continue;
11670 }
11671 else
11672 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11673 }
11674 break;
11675
11676 case R_PPC64_GOT_TLSGD16_HI:
11677 case R_PPC64_GOT_TLSGD16_HA:
11678 tls_gd = TLS_TPRELGD;
11679 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11680 goto tls_gdld_hi;
11681 break;
11682
11683 case R_PPC64_GOT_TLSLD16_HI:
11684 case R_PPC64_GOT_TLSLD16_HA:
11685 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11686 {
11687 tls_gdld_hi:
11688 if ((tls_mask & tls_gd) != 0)
11689 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11690 + R_PPC64_GOT_TPREL16_DS);
11691 else
11692 {
11693 rel->r_offset -= d_offset;
11694 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11695 r_type = R_PPC64_NONE;
11696 }
11697 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11698 }
11699 break;
11700
11701 case R_PPC64_GOT_TLSGD16:
11702 case R_PPC64_GOT_TLSGD16_LO:
11703 tls_gd = TLS_TPRELGD;
11704 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11705 goto tls_ldgd_opt;
11706 break;
11707
11708 case R_PPC64_GOT_TLSLD16:
11709 case R_PPC64_GOT_TLSLD16_LO:
11710 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11711 {
11712 unsigned int insn1, insn2, insn3;
11713 bfd_vma offset;
11714
11715 tls_ldgd_opt:
11716 offset = (bfd_vma) -1;
11717 /* If not using the newer R_PPC64_TLSGD/LD to mark
11718 __tls_get_addr calls, we must trust that the call
11719 stays with its arg setup insns, ie. that the next
11720 reloc is the __tls_get_addr call associated with
11721 the current reloc. Edit both insns. */
11722 if (input_section->has_tls_get_addr_call
11723 && rel + 1 < relend
11724 && branch_reloc_hash_match (input_bfd, rel + 1,
11725 htab->tls_get_addr,
11726 htab->tls_get_addr_fd))
11727 offset = rel[1].r_offset;
11728 if ((tls_mask & tls_gd) != 0)
11729 {
11730 /* IE */
11731 insn1 = bfd_get_32 (output_bfd,
11732 contents + rel->r_offset - d_offset);
11733 insn1 &= (1 << 26) - (1 << 2);
11734 insn1 |= 58 << 26; /* ld */
11735 insn2 = 0x7c636a14; /* add 3,3,13 */
11736 if (offset != (bfd_vma) -1)
11737 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11738 if ((tls_mask & TLS_EXPLICIT) == 0)
11739 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11740 + R_PPC64_GOT_TPREL16_DS);
11741 else
11742 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11743 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11744 }
11745 else
11746 {
11747 /* LE */
11748 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11749 insn2 = 0x38630000; /* addi 3,3,0 */
11750 if (tls_gd == 0)
11751 {
11752 /* Was an LD reloc. */
11753 if (toc_symndx)
11754 sec = local_sections[toc_symndx];
11755 for (r_symndx = 0;
11756 r_symndx < symtab_hdr->sh_info;
11757 r_symndx++)
11758 if (local_sections[r_symndx] == sec)
11759 break;
11760 if (r_symndx >= symtab_hdr->sh_info)
11761 r_symndx = 0;
11762 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11763 if (r_symndx != 0)
11764 rel->r_addend -= (local_syms[r_symndx].st_value
11765 + sec->output_offset
11766 + sec->output_section->vma);
11767 }
11768 else if (toc_symndx != 0)
11769 {
11770 r_symndx = toc_symndx;
11771 rel->r_addend = toc_addend;
11772 }
11773 r_type = R_PPC64_TPREL16_HA;
11774 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11775 if (offset != (bfd_vma) -1)
11776 {
11777 rel[1].r_info = ELF64_R_INFO (r_symndx,
11778 R_PPC64_TPREL16_LO);
11779 rel[1].r_offset = offset + d_offset;
11780 rel[1].r_addend = rel->r_addend;
11781 }
11782 }
11783 bfd_put_32 (output_bfd, insn1,
11784 contents + rel->r_offset - d_offset);
11785 if (offset != (bfd_vma) -1)
11786 {
11787 insn3 = bfd_get_32 (output_bfd,
11788 contents + offset + 4);
11789 if (insn3 == NOP
11790 || insn3 == CROR_151515 || insn3 == CROR_313131)
11791 {
11792 rel[1].r_offset += 4;
11793 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11794 insn2 = NOP;
11795 }
11796 bfd_put_32 (output_bfd, insn2, contents + offset);
11797 }
11798 if ((tls_mask & tls_gd) == 0
11799 && (tls_gd == 0 || toc_symndx != 0))
11800 {
11801 /* We changed the symbol. Start over in order
11802 to get h, sym, sec etc. right. */
11803 rel--;
11804 continue;
11805 }
11806 }
11807 break;
11808
11809 case R_PPC64_TLSGD:
11810 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11811 {
11812 unsigned int insn2, insn3;
11813 bfd_vma offset = rel->r_offset;
11814
11815 if ((tls_mask & TLS_TPRELGD) != 0)
11816 {
11817 /* IE */
11818 r_type = R_PPC64_NONE;
11819 insn2 = 0x7c636a14; /* add 3,3,13 */
11820 }
11821 else
11822 {
11823 /* LE */
11824 if (toc_symndx != 0)
11825 {
11826 r_symndx = toc_symndx;
11827 rel->r_addend = toc_addend;
11828 }
11829 r_type = R_PPC64_TPREL16_LO;
11830 rel->r_offset = offset + d_offset;
11831 insn2 = 0x38630000; /* addi 3,3,0 */
11832 }
11833 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11834 /* Zap the reloc on the _tls_get_addr call too. */
11835 BFD_ASSERT (offset == rel[1].r_offset);
11836 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11837 insn3 = bfd_get_32 (output_bfd,
11838 contents + offset + 4);
11839 if (insn3 == NOP
11840 || insn3 == CROR_151515 || insn3 == CROR_313131)
11841 {
11842 rel->r_offset += 4;
11843 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11844 insn2 = NOP;
11845 }
11846 bfd_put_32 (output_bfd, insn2, contents + offset);
11847 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11848 {
11849 rel--;
11850 continue;
11851 }
11852 }
11853 break;
11854
11855 case R_PPC64_TLSLD:
11856 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11857 {
11858 unsigned int insn2, insn3;
11859 bfd_vma offset = rel->r_offset;
11860
11861 if (toc_symndx)
11862 sec = local_sections[toc_symndx];
11863 for (r_symndx = 0;
11864 r_symndx < symtab_hdr->sh_info;
11865 r_symndx++)
11866 if (local_sections[r_symndx] == sec)
11867 break;
11868 if (r_symndx >= symtab_hdr->sh_info)
11869 r_symndx = 0;
11870 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11871 if (r_symndx != 0)
11872 rel->r_addend -= (local_syms[r_symndx].st_value
11873 + sec->output_offset
11874 + sec->output_section->vma);
11875
11876 r_type = R_PPC64_TPREL16_LO;
11877 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11878 rel->r_offset = offset + d_offset;
11879 /* Zap the reloc on the _tls_get_addr call too. */
11880 BFD_ASSERT (offset == rel[1].r_offset);
11881 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11882 insn2 = 0x38630000; /* addi 3,3,0 */
11883 insn3 = bfd_get_32 (output_bfd,
11884 contents + offset + 4);
11885 if (insn3 == NOP
11886 || insn3 == CROR_151515 || insn3 == CROR_313131)
11887 {
11888 rel->r_offset += 4;
11889 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11890 insn2 = NOP;
11891 }
11892 bfd_put_32 (output_bfd, insn2, contents + offset);
11893 rel--;
11894 continue;
11895 }
11896 break;
11897
11898 case R_PPC64_DTPMOD64:
11899 if (rel + 1 < relend
11900 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
11901 && rel[1].r_offset == rel->r_offset + 8)
11902 {
11903 if ((tls_mask & TLS_GD) == 0)
11904 {
11905 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
11906 if ((tls_mask & TLS_TPRELGD) != 0)
11907 r_type = R_PPC64_TPREL64;
11908 else
11909 {
11910 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11911 r_type = R_PPC64_NONE;
11912 }
11913 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11914 }
11915 }
11916 else
11917 {
11918 if ((tls_mask & TLS_LD) == 0)
11919 {
11920 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11921 r_type = R_PPC64_NONE;
11922 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11923 }
11924 }
11925 break;
11926
11927 case R_PPC64_TPREL64:
11928 if ((tls_mask & TLS_TPREL) == 0)
11929 {
11930 r_type = R_PPC64_NONE;
11931 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11932 }
11933 break;
11934 }
11935
11936 /* Handle other relocations that tweak non-addend part of insn. */
11937 insn = 0;
11938 max_br_offset = 1 << 25;
11939 addend = rel->r_addend;
11940 switch (r_type)
11941 {
11942 default:
11943 break;
11944
11945 /* Branch taken prediction relocations. */
11946 case R_PPC64_ADDR14_BRTAKEN:
11947 case R_PPC64_REL14_BRTAKEN:
11948 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
11949 /* Fall thru. */
11950
11951 /* Branch not taken prediction relocations. */
11952 case R_PPC64_ADDR14_BRNTAKEN:
11953 case R_PPC64_REL14_BRNTAKEN:
11954 insn |= bfd_get_32 (output_bfd,
11955 contents + rel->r_offset) & ~(0x01 << 21);
11956 /* Fall thru. */
11957
11958 case R_PPC64_REL14:
11959 max_br_offset = 1 << 15;
11960 /* Fall thru. */
11961
11962 case R_PPC64_REL24:
11963 /* Calls to functions with a different TOC, such as calls to
11964 shared objects, need to alter the TOC pointer. This is
11965 done using a linkage stub. A REL24 branching to these
11966 linkage stubs needs to be followed by a nop, as the nop
11967 will be replaced with an instruction to restore the TOC
11968 base pointer. */
11969 fdh = h;
11970 if (h != NULL
11971 && h->oh != NULL
11972 && h->oh->is_func_descriptor)
11973 fdh = ppc_follow_link (h->oh);
11974 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
11975 if (stub_entry != NULL
11976 && (stub_entry->stub_type == ppc_stub_plt_call
11977 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
11978 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
11979 {
11980 bfd_boolean can_plt_call = FALSE;
11981
11982 if (rel->r_offset + 8 <= input_section->size)
11983 {
11984 unsigned long nop;
11985 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
11986 if (nop == NOP
11987 || nop == CROR_151515 || nop == CROR_313131)
11988 {
11989 if (h != NULL
11990 && (h == htab->tls_get_addr_fd
11991 || h == htab->tls_get_addr)
11992 && !htab->no_tls_get_addr_opt)
11993 {
11994 /* Special stub used, leave nop alone. */
11995 }
11996 else
11997 bfd_put_32 (input_bfd, LD_R2_40R1,
11998 contents + rel->r_offset + 4);
11999 can_plt_call = TRUE;
12000 }
12001 }
12002
12003 if (!can_plt_call)
12004 {
12005 if (stub_entry->stub_type == ppc_stub_plt_call)
12006 {
12007 /* If this is a plain branch rather than a branch
12008 and link, don't require a nop. However, don't
12009 allow tail calls in a shared library as they
12010 will result in r2 being corrupted. */
12011 unsigned long br;
12012 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12013 if (info->executable && (br & 1) == 0)
12014 can_plt_call = TRUE;
12015 else
12016 stub_entry = NULL;
12017 }
12018 else if (h != NULL
12019 && strcmp (h->elf.root.root.string,
12020 ".__libc_start_main") == 0)
12021 {
12022 /* Allow crt1 branch to go via a toc adjusting stub. */
12023 can_plt_call = TRUE;
12024 }
12025 else
12026 {
12027 if (strcmp (input_section->output_section->name,
12028 ".init") == 0
12029 || strcmp (input_section->output_section->name,
12030 ".fini") == 0)
12031 (*_bfd_error_handler)
12032 (_("%B(%A+0x%lx): automatic multiple TOCs "
12033 "not supported using your crt files; "
12034 "recompile with -mminimal-toc or upgrade gcc"),
12035 input_bfd,
12036 input_section,
12037 (long) rel->r_offset);
12038 else
12039 (*_bfd_error_handler)
12040 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
12041 "does not allow automatic multiple TOCs; "
12042 "recompile with -mminimal-toc or "
12043 "-fno-optimize-sibling-calls, "
12044 "or make `%s' extern"),
12045 input_bfd,
12046 input_section,
12047 (long) rel->r_offset,
12048 sym_name,
12049 sym_name);
12050 bfd_set_error (bfd_error_bad_value);
12051 ret = FALSE;
12052 }
12053 }
12054
12055 if (can_plt_call
12056 && stub_entry->stub_type == ppc_stub_plt_call)
12057 unresolved_reloc = FALSE;
12058 }
12059
12060 if ((stub_entry == NULL
12061 || stub_entry->stub_type == ppc_stub_long_branch
12062 || stub_entry->stub_type == ppc_stub_plt_branch)
12063 && get_opd_info (sec) != NULL)
12064 {
12065 /* The branch destination is the value of the opd entry. */
12066 bfd_vma off = (relocation + addend
12067 - sec->output_section->vma
12068 - sec->output_offset);
12069 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12070 if (dest != (bfd_vma) -1)
12071 {
12072 relocation = dest;
12073 addend = 0;
12074 }
12075 }
12076
12077 /* If the branch is out of reach we ought to have a long
12078 branch stub. */
12079 from = (rel->r_offset
12080 + input_section->output_offset
12081 + input_section->output_section->vma);
12082
12083 if (stub_entry != NULL
12084 && (stub_entry->stub_type == ppc_stub_long_branch
12085 || stub_entry->stub_type == ppc_stub_plt_branch)
12086 && (r_type == R_PPC64_ADDR14_BRTAKEN
12087 || r_type == R_PPC64_ADDR14_BRNTAKEN
12088 || (relocation + addend - from + max_br_offset
12089 < 2 * max_br_offset)))
12090 /* Don't use the stub if this branch is in range. */
12091 stub_entry = NULL;
12092
12093 if (stub_entry != NULL)
12094 {
12095 /* Munge up the value and addend so that we call the stub
12096 rather than the procedure directly. */
12097 relocation = (stub_entry->stub_offset
12098 + stub_entry->stub_sec->output_offset
12099 + stub_entry->stub_sec->output_section->vma);
12100 addend = 0;
12101 }
12102
12103 if (insn != 0)
12104 {
12105 if (is_power4)
12106 {
12107 /* Set 'a' bit. This is 0b00010 in BO field for branch
12108 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12109 for branch on CTR insns (BO == 1a00t or 1a01t). */
12110 if ((insn & (0x14 << 21)) == (0x04 << 21))
12111 insn |= 0x02 << 21;
12112 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12113 insn |= 0x08 << 21;
12114 else
12115 break;
12116 }
12117 else
12118 {
12119 /* Invert 'y' bit if not the default. */
12120 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12121 insn ^= 0x01 << 21;
12122 }
12123
12124 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12125 }
12126
12127 /* NOP out calls to undefined weak functions.
12128 We can thus call a weak function without first
12129 checking whether the function is defined. */
12130 else if (h != NULL
12131 && h->elf.root.type == bfd_link_hash_undefweak
12132 && h->elf.dynindx == -1
12133 && r_type == R_PPC64_REL24
12134 && relocation == 0
12135 && addend == 0)
12136 {
12137 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12138 continue;
12139 }
12140 break;
12141 }
12142
12143 /* Set `addend'. */
12144 tls_type = 0;
12145 switch (r_type)
12146 {
12147 default:
12148 (*_bfd_error_handler)
12149 (_("%B: unknown relocation type %d for symbol %s"),
12150 input_bfd, (int) r_type, sym_name);
12151
12152 bfd_set_error (bfd_error_bad_value);
12153 ret = FALSE;
12154 continue;
12155
12156 case R_PPC64_NONE:
12157 case R_PPC64_TLS:
12158 case R_PPC64_TLSGD:
12159 case R_PPC64_TLSLD:
12160 case R_PPC64_GNU_VTINHERIT:
12161 case R_PPC64_GNU_VTENTRY:
12162 continue;
12163
12164 /* GOT16 relocations. Like an ADDR16 using the symbol's
12165 address in the GOT as relocation value instead of the
12166 symbol's value itself. Also, create a GOT entry for the
12167 symbol and put the symbol value there. */
12168 case R_PPC64_GOT_TLSGD16:
12169 case R_PPC64_GOT_TLSGD16_LO:
12170 case R_PPC64_GOT_TLSGD16_HI:
12171 case R_PPC64_GOT_TLSGD16_HA:
12172 tls_type = TLS_TLS | TLS_GD;
12173 goto dogot;
12174
12175 case R_PPC64_GOT_TLSLD16:
12176 case R_PPC64_GOT_TLSLD16_LO:
12177 case R_PPC64_GOT_TLSLD16_HI:
12178 case R_PPC64_GOT_TLSLD16_HA:
12179 tls_type = TLS_TLS | TLS_LD;
12180 goto dogot;
12181
12182 case R_PPC64_GOT_TPREL16_DS:
12183 case R_PPC64_GOT_TPREL16_LO_DS:
12184 case R_PPC64_GOT_TPREL16_HI:
12185 case R_PPC64_GOT_TPREL16_HA:
12186 tls_type = TLS_TLS | TLS_TPREL;
12187 goto dogot;
12188
12189 case R_PPC64_GOT_DTPREL16_DS:
12190 case R_PPC64_GOT_DTPREL16_LO_DS:
12191 case R_PPC64_GOT_DTPREL16_HI:
12192 case R_PPC64_GOT_DTPREL16_HA:
12193 tls_type = TLS_TLS | TLS_DTPREL;
12194 goto dogot;
12195
12196 case R_PPC64_GOT16:
12197 case R_PPC64_GOT16_LO:
12198 case R_PPC64_GOT16_HI:
12199 case R_PPC64_GOT16_HA:
12200 case R_PPC64_GOT16_DS:
12201 case R_PPC64_GOT16_LO_DS:
12202 dogot:
12203 {
12204 /* Relocation is to the entry for this symbol in the global
12205 offset table. */
12206 asection *got;
12207 bfd_vma *offp;
12208 bfd_vma off;
12209 unsigned long indx = 0;
12210 struct got_entry *ent;
12211
12212 if (tls_type == (TLS_TLS | TLS_LD)
12213 && (h == NULL
12214 || !h->elf.def_dynamic))
12215 ent = ppc64_tlsld_got (input_bfd);
12216 else
12217 {
12218
12219 if (h != NULL)
12220 {
12221 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12222 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12223 &h->elf)
12224 || (info->shared
12225 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
12226 /* This is actually a static link, or it is a
12227 -Bsymbolic link and the symbol is defined
12228 locally, or the symbol was forced to be local
12229 because of a version file. */
12230 ;
12231 else
12232 {
12233 indx = h->elf.dynindx;
12234 unresolved_reloc = FALSE;
12235 }
12236 ent = h->elf.got.glist;
12237 }
12238 else
12239 {
12240 if (local_got_ents == NULL)
12241 abort ();
12242 ent = local_got_ents[r_symndx];
12243 }
12244
12245 for (; ent != NULL; ent = ent->next)
12246 if (ent->addend == orig_addend
12247 && ent->owner == input_bfd
12248 && ent->tls_type == tls_type)
12249 break;
12250 }
12251
12252 if (ent == NULL)
12253 abort ();
12254 if (ent->is_indirect)
12255 ent = ent->got.ent;
12256 offp = &ent->got.offset;
12257 got = ppc64_elf_tdata (ent->owner)->got;
12258 if (got == NULL)
12259 abort ();
12260
12261 /* The offset must always be a multiple of 8. We use the
12262 least significant bit to record whether we have already
12263 processed this entry. */
12264 off = *offp;
12265 if ((off & 1) != 0)
12266 off &= ~1;
12267 else
12268 {
12269 /* Generate relocs for the dynamic linker, except in
12270 the case of TLSLD where we'll use one entry per
12271 module. */
12272 asection *relgot;
12273 bfd_boolean ifunc;
12274
12275 *offp = off | 1;
12276 relgot = NULL;
12277 ifunc = (h != NULL
12278 ? h->elf.type == STT_GNU_IFUNC
12279 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12280 if ((info->shared || indx != 0)
12281 && (h == NULL
12282 || (tls_type == (TLS_TLS | TLS_LD)
12283 && !h->elf.def_dynamic)
12284 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12285 || h->elf.root.type != bfd_link_hash_undefweak))
12286 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12287 else if (ifunc)
12288 relgot = htab->reliplt;
12289 if (relgot != NULL)
12290 {
12291 outrel.r_offset = (got->output_section->vma
12292 + got->output_offset
12293 + off);
12294 outrel.r_addend = addend;
12295 if (tls_type & (TLS_LD | TLS_GD))
12296 {
12297 outrel.r_addend = 0;
12298 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12299 if (tls_type == (TLS_TLS | TLS_GD))
12300 {
12301 loc = relgot->contents;
12302 loc += (relgot->reloc_count++
12303 * sizeof (Elf64_External_Rela));
12304 bfd_elf64_swap_reloca_out (output_bfd,
12305 &outrel, loc);
12306 outrel.r_offset += 8;
12307 outrel.r_addend = addend;
12308 outrel.r_info
12309 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12310 }
12311 }
12312 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12313 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12314 else if (tls_type == (TLS_TLS | TLS_TPREL))
12315 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12316 else if (indx != 0)
12317 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12318 else
12319 {
12320 if (ifunc)
12321 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12322 else
12323 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12324
12325 /* Write the .got section contents for the sake
12326 of prelink. */
12327 loc = got->contents + off;
12328 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12329 loc);
12330 }
12331
12332 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12333 {
12334 outrel.r_addend += relocation;
12335 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12336 outrel.r_addend -= htab->elf.tls_sec->vma;
12337 }
12338 loc = relgot->contents;
12339 loc += (relgot->reloc_count++
12340 * sizeof (Elf64_External_Rela));
12341 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12342 }
12343
12344 /* Init the .got section contents here if we're not
12345 emitting a reloc. */
12346 else
12347 {
12348 relocation += addend;
12349 if (tls_type == (TLS_TLS | TLS_LD))
12350 relocation = 1;
12351 else if (tls_type != 0)
12352 {
12353 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12354 if (tls_type == (TLS_TLS | TLS_TPREL))
12355 relocation += DTP_OFFSET - TP_OFFSET;
12356
12357 if (tls_type == (TLS_TLS | TLS_GD))
12358 {
12359 bfd_put_64 (output_bfd, relocation,
12360 got->contents + off + 8);
12361 relocation = 1;
12362 }
12363 }
12364
12365 bfd_put_64 (output_bfd, relocation,
12366 got->contents + off);
12367 }
12368 }
12369
12370 if (off >= (bfd_vma) -2)
12371 abort ();
12372
12373 relocation = got->output_section->vma + got->output_offset + off;
12374 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12375 }
12376 break;
12377
12378 case R_PPC64_PLT16_HA:
12379 case R_PPC64_PLT16_HI:
12380 case R_PPC64_PLT16_LO:
12381 case R_PPC64_PLT32:
12382 case R_PPC64_PLT64:
12383 /* Relocation is to the entry for this symbol in the
12384 procedure linkage table. */
12385
12386 /* Resolve a PLT reloc against a local symbol directly,
12387 without using the procedure linkage table. */
12388 if (h == NULL)
12389 break;
12390
12391 /* It's possible that we didn't make a PLT entry for this
12392 symbol. This happens when statically linking PIC code,
12393 or when using -Bsymbolic. Go find a match if there is a
12394 PLT entry. */
12395 if (htab->plt != NULL)
12396 {
12397 struct plt_entry *ent;
12398 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12399 if (ent->addend == orig_addend
12400 && ent->plt.offset != (bfd_vma) -1)
12401 {
12402 relocation = (htab->plt->output_section->vma
12403 + htab->plt->output_offset
12404 + ent->plt.offset);
12405 unresolved_reloc = FALSE;
12406 }
12407 }
12408 break;
12409
12410 case R_PPC64_TOC:
12411 /* Relocation value is TOC base. */
12412 relocation = TOCstart;
12413 if (r_symndx == 0)
12414 relocation += htab->stub_group[input_section->id].toc_off;
12415 else if (unresolved_reloc)
12416 ;
12417 else if (sec != NULL && sec->id <= htab->top_id)
12418 relocation += htab->stub_group[sec->id].toc_off;
12419 else
12420 unresolved_reloc = TRUE;
12421 goto dodyn;
12422
12423 /* TOC16 relocs. We want the offset relative to the TOC base,
12424 which is the address of the start of the TOC plus 0x8000.
12425 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12426 in this order. */
12427 case R_PPC64_TOC16:
12428 case R_PPC64_TOC16_LO:
12429 case R_PPC64_TOC16_HI:
12430 case R_PPC64_TOC16_DS:
12431 case R_PPC64_TOC16_LO_DS:
12432 case R_PPC64_TOC16_HA:
12433 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12434 break;
12435
12436 /* Relocate against the beginning of the section. */
12437 case R_PPC64_SECTOFF:
12438 case R_PPC64_SECTOFF_LO:
12439 case R_PPC64_SECTOFF_HI:
12440 case R_PPC64_SECTOFF_DS:
12441 case R_PPC64_SECTOFF_LO_DS:
12442 case R_PPC64_SECTOFF_HA:
12443 if (sec != NULL)
12444 addend -= sec->output_section->vma;
12445 break;
12446
12447 case R_PPC64_REL16:
12448 case R_PPC64_REL16_LO:
12449 case R_PPC64_REL16_HI:
12450 case R_PPC64_REL16_HA:
12451 break;
12452
12453 case R_PPC64_REL14:
12454 case R_PPC64_REL14_BRNTAKEN:
12455 case R_PPC64_REL14_BRTAKEN:
12456 case R_PPC64_REL24:
12457 break;
12458
12459 case R_PPC64_TPREL16:
12460 case R_PPC64_TPREL16_LO:
12461 case R_PPC64_TPREL16_HI:
12462 case R_PPC64_TPREL16_HA:
12463 case R_PPC64_TPREL16_DS:
12464 case R_PPC64_TPREL16_LO_DS:
12465 case R_PPC64_TPREL16_HIGHER:
12466 case R_PPC64_TPREL16_HIGHERA:
12467 case R_PPC64_TPREL16_HIGHEST:
12468 case R_PPC64_TPREL16_HIGHESTA:
12469 if (h != NULL
12470 && h->elf.root.type == bfd_link_hash_undefweak
12471 && h->elf.dynindx == -1)
12472 {
12473 /* Make this relocation against an undefined weak symbol
12474 resolve to zero. This is really just a tweak, since
12475 code using weak externs ought to check that they are
12476 defined before using them. */
12477 bfd_byte *p = contents + rel->r_offset - d_offset;
12478
12479 insn = bfd_get_32 (output_bfd, p);
12480 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12481 if (insn != 0)
12482 bfd_put_32 (output_bfd, insn, p);
12483 break;
12484 }
12485 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12486 if (info->shared)
12487 /* The TPREL16 relocs shouldn't really be used in shared
12488 libs as they will result in DT_TEXTREL being set, but
12489 support them anyway. */
12490 goto dodyn;
12491 break;
12492
12493 case R_PPC64_DTPREL16:
12494 case R_PPC64_DTPREL16_LO:
12495 case R_PPC64_DTPREL16_HI:
12496 case R_PPC64_DTPREL16_HA:
12497 case R_PPC64_DTPREL16_DS:
12498 case R_PPC64_DTPREL16_LO_DS:
12499 case R_PPC64_DTPREL16_HIGHER:
12500 case R_PPC64_DTPREL16_HIGHERA:
12501 case R_PPC64_DTPREL16_HIGHEST:
12502 case R_PPC64_DTPREL16_HIGHESTA:
12503 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12504 break;
12505
12506 case R_PPC64_DTPMOD64:
12507 relocation = 1;
12508 addend = 0;
12509 goto dodyn;
12510
12511 case R_PPC64_TPREL64:
12512 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12513 goto dodyn;
12514
12515 case R_PPC64_DTPREL64:
12516 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12517 /* Fall thru */
12518
12519 /* Relocations that may need to be propagated if this is a
12520 dynamic object. */
12521 case R_PPC64_REL30:
12522 case R_PPC64_REL32:
12523 case R_PPC64_REL64:
12524 case R_PPC64_ADDR14:
12525 case R_PPC64_ADDR14_BRNTAKEN:
12526 case R_PPC64_ADDR14_BRTAKEN:
12527 case R_PPC64_ADDR16:
12528 case R_PPC64_ADDR16_DS:
12529 case R_PPC64_ADDR16_HA:
12530 case R_PPC64_ADDR16_HI:
12531 case R_PPC64_ADDR16_HIGHER:
12532 case R_PPC64_ADDR16_HIGHERA:
12533 case R_PPC64_ADDR16_HIGHEST:
12534 case R_PPC64_ADDR16_HIGHESTA:
12535 case R_PPC64_ADDR16_LO:
12536 case R_PPC64_ADDR16_LO_DS:
12537 case R_PPC64_ADDR24:
12538 case R_PPC64_ADDR32:
12539 case R_PPC64_ADDR64:
12540 case R_PPC64_UADDR16:
12541 case R_PPC64_UADDR32:
12542 case R_PPC64_UADDR64:
12543 dodyn:
12544 if ((input_section->flags & SEC_ALLOC) == 0)
12545 break;
12546
12547 if (NO_OPD_RELOCS && is_opd)
12548 break;
12549
12550 if ((info->shared
12551 && (h == NULL
12552 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12553 || h->elf.root.type != bfd_link_hash_undefweak)
12554 && (must_be_dyn_reloc (info, r_type)
12555 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12556 || (ELIMINATE_COPY_RELOCS
12557 && !info->shared
12558 && h != NULL
12559 && h->elf.dynindx != -1
12560 && !h->elf.non_got_ref
12561 && !h->elf.def_regular)
12562 || (!info->shared
12563 && (h != NULL
12564 ? h->elf.type == STT_GNU_IFUNC
12565 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12566 {
12567 bfd_boolean skip, relocate;
12568 asection *sreloc;
12569 bfd_vma out_off;
12570
12571 /* When generating a dynamic object, these relocations
12572 are copied into the output file to be resolved at run
12573 time. */
12574
12575 skip = FALSE;
12576 relocate = FALSE;
12577
12578 out_off = _bfd_elf_section_offset (output_bfd, info,
12579 input_section, rel->r_offset);
12580 if (out_off == (bfd_vma) -1)
12581 skip = TRUE;
12582 else if (out_off == (bfd_vma) -2)
12583 skip = TRUE, relocate = TRUE;
12584 out_off += (input_section->output_section->vma
12585 + input_section->output_offset);
12586 outrel.r_offset = out_off;
12587 outrel.r_addend = rel->r_addend;
12588
12589 /* Optimize unaligned reloc use. */
12590 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12591 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12592 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12593 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12594 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12595 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12596 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12597 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12598 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12599
12600 if (skip)
12601 memset (&outrel, 0, sizeof outrel);
12602 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
12603 && !is_opd
12604 && r_type != R_PPC64_TOC)
12605 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12606 else
12607 {
12608 /* This symbol is local, or marked to become local,
12609 or this is an opd section reloc which must point
12610 at a local function. */
12611 outrel.r_addend += relocation;
12612 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12613 {
12614 if (is_opd && h != NULL)
12615 {
12616 /* Lie about opd entries. This case occurs
12617 when building shared libraries and we
12618 reference a function in another shared
12619 lib. The same thing happens for a weak
12620 definition in an application that's
12621 overridden by a strong definition in a
12622 shared lib. (I believe this is a generic
12623 bug in binutils handling of weak syms.)
12624 In these cases we won't use the opd
12625 entry in this lib. */
12626 unresolved_reloc = FALSE;
12627 }
12628 if (!is_opd
12629 && r_type == R_PPC64_ADDR64
12630 && (h != NULL
12631 ? h->elf.type == STT_GNU_IFUNC
12632 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12633 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12634 else
12635 {
12636 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12637
12638 /* We need to relocate .opd contents for ld.so.
12639 Prelink also wants simple and consistent rules
12640 for relocs. This make all RELATIVE relocs have
12641 *r_offset equal to r_addend. */
12642 relocate = TRUE;
12643 }
12644 }
12645 else
12646 {
12647 long indx = 0;
12648
12649 if (h != NULL
12650 ? h->elf.type == STT_GNU_IFUNC
12651 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12652 {
12653 (*_bfd_error_handler)
12654 (_("%B(%A+0x%lx): relocation %s for indirect "
12655 "function %s unsupported"),
12656 input_bfd,
12657 input_section,
12658 (long) rel->r_offset,
12659 ppc64_elf_howto_table[r_type]->name,
12660 sym_name);
12661 ret = FALSE;
12662 }
12663 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12664 ;
12665 else if (sec == NULL || sec->owner == NULL)
12666 {
12667 bfd_set_error (bfd_error_bad_value);
12668 return FALSE;
12669 }
12670 else
12671 {
12672 asection *osec;
12673
12674 osec = sec->output_section;
12675 indx = elf_section_data (osec)->dynindx;
12676
12677 if (indx == 0)
12678 {
12679 if ((osec->flags & SEC_READONLY) == 0
12680 && htab->elf.data_index_section != NULL)
12681 osec = htab->elf.data_index_section;
12682 else
12683 osec = htab->elf.text_index_section;
12684 indx = elf_section_data (osec)->dynindx;
12685 }
12686 BFD_ASSERT (indx != 0);
12687
12688 /* We are turning this relocation into one
12689 against a section symbol, so subtract out
12690 the output section's address but not the
12691 offset of the input section in the output
12692 section. */
12693 outrel.r_addend -= osec->vma;
12694 }
12695
12696 outrel.r_info = ELF64_R_INFO (indx, r_type);
12697 }
12698 }
12699
12700 sreloc = elf_section_data (input_section)->sreloc;
12701 if (!htab->elf.dynamic_sections_created)
12702 sreloc = htab->reliplt;
12703 if (sreloc == NULL)
12704 abort ();
12705
12706 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12707 >= sreloc->size)
12708 abort ();
12709 loc = sreloc->contents;
12710 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12711 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12712
12713 /* If this reloc is against an external symbol, it will
12714 be computed at runtime, so there's no need to do
12715 anything now. However, for the sake of prelink ensure
12716 that the section contents are a known value. */
12717 if (! relocate)
12718 {
12719 unresolved_reloc = FALSE;
12720 /* The value chosen here is quite arbitrary as ld.so
12721 ignores section contents except for the special
12722 case of .opd where the contents might be accessed
12723 before relocation. Choose zero, as that won't
12724 cause reloc overflow. */
12725 relocation = 0;
12726 addend = 0;
12727 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12728 to improve backward compatibility with older
12729 versions of ld. */
12730 if (r_type == R_PPC64_ADDR64)
12731 addend = outrel.r_addend;
12732 /* Adjust pc_relative relocs to have zero in *r_offset. */
12733 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12734 addend = (input_section->output_section->vma
12735 + input_section->output_offset
12736 + rel->r_offset);
12737 }
12738 }
12739 break;
12740
12741 case R_PPC64_COPY:
12742 case R_PPC64_GLOB_DAT:
12743 case R_PPC64_JMP_SLOT:
12744 case R_PPC64_JMP_IREL:
12745 case R_PPC64_RELATIVE:
12746 /* We shouldn't ever see these dynamic relocs in relocatable
12747 files. */
12748 /* Fall through. */
12749
12750 case R_PPC64_PLTGOT16:
12751 case R_PPC64_PLTGOT16_DS:
12752 case R_PPC64_PLTGOT16_HA:
12753 case R_PPC64_PLTGOT16_HI:
12754 case R_PPC64_PLTGOT16_LO:
12755 case R_PPC64_PLTGOT16_LO_DS:
12756 case R_PPC64_PLTREL32:
12757 case R_PPC64_PLTREL64:
12758 /* These ones haven't been implemented yet. */
12759
12760 (*_bfd_error_handler)
12761 (_("%B: relocation %s is not supported for symbol %s."),
12762 input_bfd,
12763 ppc64_elf_howto_table[r_type]->name, sym_name);
12764
12765 bfd_set_error (bfd_error_invalid_operation);
12766 ret = FALSE;
12767 continue;
12768 }
12769
12770 /* Multi-instruction sequences that access the TOC can be
12771 optimized, eg. addis ra,r2,0; addi rb,ra,x;
12772 to nop; addi rb,r2,x; */
12773 switch (r_type)
12774 {
12775 default:
12776 break;
12777
12778 case R_PPC64_GOT_TLSLD16_HI:
12779 case R_PPC64_GOT_TLSGD16_HI:
12780 case R_PPC64_GOT_TPREL16_HI:
12781 case R_PPC64_GOT_DTPREL16_HI:
12782 case R_PPC64_GOT16_HI:
12783 case R_PPC64_TOC16_HI:
12784 /* These relocs would only be useful if building up an
12785 offset to later add to r2, perhaps in an indexed
12786 addressing mode instruction. Don't try to optimize.
12787 Unfortunately, the possibility of someone building up an
12788 offset like this or even with the HA relocs, means that
12789 we need to check the high insn when optimizing the low
12790 insn. */
12791 break;
12792
12793 case R_PPC64_GOT_TLSLD16_HA:
12794 case R_PPC64_GOT_TLSGD16_HA:
12795 case R_PPC64_GOT_TPREL16_HA:
12796 case R_PPC64_GOT_DTPREL16_HA:
12797 case R_PPC64_GOT16_HA:
12798 case R_PPC64_TOC16_HA:
12799 /* For now we don't nop out the first instruction. */
12800 break;
12801
12802 case R_PPC64_GOT_TLSLD16_LO:
12803 case R_PPC64_GOT_TLSGD16_LO:
12804 case R_PPC64_GOT_TPREL16_LO_DS:
12805 case R_PPC64_GOT_DTPREL16_LO_DS:
12806 case R_PPC64_GOT16_LO:
12807 case R_PPC64_GOT16_LO_DS:
12808 case R_PPC64_TOC16_LO:
12809 case R_PPC64_TOC16_LO_DS:
12810 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
12811 {
12812 bfd_byte *p = contents + (rel->r_offset & ~3);
12813 insn = bfd_get_32 (input_bfd, p);
12814 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
12815 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
12816 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
12817 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
12818 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
12819 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
12820 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
12821 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
12822 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
12823 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
12824 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
12825 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
12826 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
12827 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
12828 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
12829 && (insn & 3) != 1)
12830 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
12831 && ((insn & 3) == 0 || (insn & 3) == 3)))
12832 {
12833 unsigned int reg = (insn >> 16) & 0x1f;
12834 if (ha_reloc_match (relocs, rel, reg, input_bfd, contents))
12835 {
12836 insn &= ~(0x1f << 16);
12837 insn |= 2 << 16;
12838 bfd_put_32 (input_bfd, insn, p);
12839 }
12840 }
12841 }
12842 break;
12843 }
12844
12845 /* Do any further special processing. */
12846 switch (r_type)
12847 {
12848 default:
12849 break;
12850
12851 case R_PPC64_ADDR16_HA:
12852 case R_PPC64_REL16_HA:
12853 case R_PPC64_ADDR16_HIGHERA:
12854 case R_PPC64_ADDR16_HIGHESTA:
12855 case R_PPC64_TOC16_HA:
12856 case R_PPC64_SECTOFF_HA:
12857 case R_PPC64_TPREL16_HA:
12858 case R_PPC64_DTPREL16_HA:
12859 case R_PPC64_TPREL16_HIGHER:
12860 case R_PPC64_TPREL16_HIGHERA:
12861 case R_PPC64_TPREL16_HIGHEST:
12862 case R_PPC64_TPREL16_HIGHESTA:
12863 case R_PPC64_DTPREL16_HIGHER:
12864 case R_PPC64_DTPREL16_HIGHERA:
12865 case R_PPC64_DTPREL16_HIGHEST:
12866 case R_PPC64_DTPREL16_HIGHESTA:
12867 /* It's just possible that this symbol is a weak symbol
12868 that's not actually defined anywhere. In that case,
12869 'sec' would be NULL, and we should leave the symbol
12870 alone (it will be set to zero elsewhere in the link). */
12871 if (sec == NULL)
12872 break;
12873 /* Fall thru */
12874
12875 case R_PPC64_GOT16_HA:
12876 case R_PPC64_PLTGOT16_HA:
12877 case R_PPC64_PLT16_HA:
12878 case R_PPC64_GOT_TLSGD16_HA:
12879 case R_PPC64_GOT_TLSLD16_HA:
12880 case R_PPC64_GOT_TPREL16_HA:
12881 case R_PPC64_GOT_DTPREL16_HA:
12882 /* Add 0x10000 if sign bit in 0:15 is set.
12883 Bits 0:15 are not used. */
12884 addend += 0x8000;
12885 break;
12886
12887 case R_PPC64_ADDR16_DS:
12888 case R_PPC64_ADDR16_LO_DS:
12889 case R_PPC64_GOT16_DS:
12890 case R_PPC64_GOT16_LO_DS:
12891 case R_PPC64_PLT16_LO_DS:
12892 case R_PPC64_SECTOFF_DS:
12893 case R_PPC64_SECTOFF_LO_DS:
12894 case R_PPC64_TOC16_DS:
12895 case R_PPC64_TOC16_LO_DS:
12896 case R_PPC64_PLTGOT16_DS:
12897 case R_PPC64_PLTGOT16_LO_DS:
12898 case R_PPC64_GOT_TPREL16_DS:
12899 case R_PPC64_GOT_TPREL16_LO_DS:
12900 case R_PPC64_GOT_DTPREL16_DS:
12901 case R_PPC64_GOT_DTPREL16_LO_DS:
12902 case R_PPC64_TPREL16_DS:
12903 case R_PPC64_TPREL16_LO_DS:
12904 case R_PPC64_DTPREL16_DS:
12905 case R_PPC64_DTPREL16_LO_DS:
12906 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
12907 mask = 3;
12908 /* If this reloc is against an lq insn, then the value must be
12909 a multiple of 16. This is somewhat of a hack, but the
12910 "correct" way to do this by defining _DQ forms of all the
12911 _DS relocs bloats all reloc switches in this file. It
12912 doesn't seem to make much sense to use any of these relocs
12913 in data, so testing the insn should be safe. */
12914 if ((insn & (0x3f << 26)) == (56u << 26))
12915 mask = 15;
12916 if (((relocation + addend) & mask) != 0)
12917 {
12918 (*_bfd_error_handler)
12919 (_("%B: error: relocation %s not a multiple of %d"),
12920 input_bfd,
12921 ppc64_elf_howto_table[r_type]->name,
12922 mask + 1);
12923 bfd_set_error (bfd_error_bad_value);
12924 ret = FALSE;
12925 continue;
12926 }
12927 break;
12928 }
12929
12930 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12931 because such sections are not SEC_ALLOC and thus ld.so will
12932 not process them. */
12933 if (unresolved_reloc
12934 && !((input_section->flags & SEC_DEBUGGING) != 0
12935 && h->elf.def_dynamic))
12936 {
12937 (*_bfd_error_handler)
12938 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12939 input_bfd,
12940 input_section,
12941 (long) rel->r_offset,
12942 ppc64_elf_howto_table[(int) r_type]->name,
12943 h->elf.root.root.string);
12944 ret = FALSE;
12945 }
12946
12947 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
12948 input_bfd,
12949 input_section,
12950 contents,
12951 rel->r_offset,
12952 relocation,
12953 addend);
12954
12955 if (r != bfd_reloc_ok)
12956 {
12957 if (sym_name == NULL)
12958 sym_name = "(null)";
12959 if (r == bfd_reloc_overflow)
12960 {
12961 if (warned)
12962 continue;
12963 if (h != NULL
12964 && h->elf.root.type == bfd_link_hash_undefweak
12965 && ppc64_elf_howto_table[r_type]->pc_relative)
12966 {
12967 /* Assume this is a call protected by other code that
12968 detects the symbol is undefined. If this is the case,
12969 we can safely ignore the overflow. If not, the
12970 program is hosed anyway, and a little warning isn't
12971 going to help. */
12972
12973 continue;
12974 }
12975
12976 if (!((*info->callbacks->reloc_overflow)
12977 (info, (h ? &h->elf.root : NULL), sym_name,
12978 ppc64_elf_howto_table[r_type]->name,
12979 orig_addend, input_bfd, input_section, rel->r_offset)))
12980 return FALSE;
12981 }
12982 else
12983 {
12984 (*_bfd_error_handler)
12985 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
12986 input_bfd,
12987 input_section,
12988 (long) rel->r_offset,
12989 ppc64_elf_howto_table[r_type]->name,
12990 sym_name,
12991 (int) r);
12992 ret = FALSE;
12993 }
12994 }
12995 }
12996
12997 /* If we're emitting relocations, then shortly after this function
12998 returns, reloc offsets and addends for this section will be
12999 adjusted. Worse, reloc symbol indices will be for the output
13000 file rather than the input. Save a copy of the relocs for
13001 opd_entry_value. */
13002 if (is_opd && (info->emitrelocations || info->relocatable))
13003 {
13004 bfd_size_type amt;
13005 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13006 rel = bfd_alloc (input_bfd, amt);
13007 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13008 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13009 if (rel == NULL)
13010 return FALSE;
13011 memcpy (rel, relocs, amt);
13012 }
13013 return ret;
13014 }
13015
13016 /* Adjust the value of any local symbols in opd sections. */
13017
13018 static int
13019 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13020 const char *name ATTRIBUTE_UNUSED,
13021 Elf_Internal_Sym *elfsym,
13022 asection *input_sec,
13023 struct elf_link_hash_entry *h)
13024 {
13025 struct _opd_sec_data *opd;
13026 long adjust;
13027 bfd_vma value;
13028
13029 if (h != NULL)
13030 return 1;
13031
13032 opd = get_opd_info (input_sec);
13033 if (opd == NULL || opd->adjust == NULL)
13034 return 1;
13035
13036 value = elfsym->st_value - input_sec->output_offset;
13037 if (!info->relocatable)
13038 value -= input_sec->output_section->vma;
13039
13040 adjust = opd->adjust[value / 8];
13041 if (adjust == -1)
13042 return 2;
13043
13044 elfsym->st_value += adjust;
13045 return 1;
13046 }
13047
13048 /* Finish up dynamic symbol handling. We set the contents of various
13049 dynamic sections here. */
13050
13051 static bfd_boolean
13052 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13053 struct bfd_link_info *info,
13054 struct elf_link_hash_entry *h,
13055 Elf_Internal_Sym *sym)
13056 {
13057 struct ppc_link_hash_table *htab;
13058 struct plt_entry *ent;
13059 Elf_Internal_Rela rela;
13060 bfd_byte *loc;
13061
13062 htab = ppc_hash_table (info);
13063 if (htab == NULL)
13064 return FALSE;
13065
13066 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13067 if (ent->plt.offset != (bfd_vma) -1)
13068 {
13069 /* This symbol has an entry in the procedure linkage
13070 table. Set it up. */
13071 if (!htab->elf.dynamic_sections_created
13072 || h->dynindx == -1)
13073 {
13074 BFD_ASSERT (h->type == STT_GNU_IFUNC
13075 && h->def_regular
13076 && (h->root.type == bfd_link_hash_defined
13077 || h->root.type == bfd_link_hash_defweak));
13078 rela.r_offset = (htab->iplt->output_section->vma
13079 + htab->iplt->output_offset
13080 + ent->plt.offset);
13081 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13082 rela.r_addend = (h->root.u.def.value
13083 + h->root.u.def.section->output_offset
13084 + h->root.u.def.section->output_section->vma
13085 + ent->addend);
13086 loc = (htab->reliplt->contents
13087 + (htab->reliplt->reloc_count++
13088 * sizeof (Elf64_External_Rela)));
13089 }
13090 else
13091 {
13092 rela.r_offset = (htab->plt->output_section->vma
13093 + htab->plt->output_offset
13094 + ent->plt.offset);
13095 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13096 rela.r_addend = ent->addend;
13097 loc = (htab->relplt->contents
13098 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13099 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13100 }
13101 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13102 }
13103
13104 if (h->needs_copy)
13105 {
13106 /* This symbol needs a copy reloc. Set it up. */
13107
13108 if (h->dynindx == -1
13109 || (h->root.type != bfd_link_hash_defined
13110 && h->root.type != bfd_link_hash_defweak)
13111 || htab->relbss == NULL)
13112 abort ();
13113
13114 rela.r_offset = (h->root.u.def.value
13115 + h->root.u.def.section->output_section->vma
13116 + h->root.u.def.section->output_offset);
13117 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13118 rela.r_addend = 0;
13119 loc = htab->relbss->contents;
13120 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13121 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13122 }
13123
13124 /* Mark some specially defined symbols as absolute. */
13125 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13126 sym->st_shndx = SHN_ABS;
13127
13128 return TRUE;
13129 }
13130
13131 /* Used to decide how to sort relocs in an optimal manner for the
13132 dynamic linker, before writing them out. */
13133
13134 static enum elf_reloc_type_class
13135 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13136 {
13137 enum elf_ppc64_reloc_type r_type;
13138
13139 r_type = ELF64_R_TYPE (rela->r_info);
13140 switch (r_type)
13141 {
13142 case R_PPC64_RELATIVE:
13143 return reloc_class_relative;
13144 case R_PPC64_JMP_SLOT:
13145 return reloc_class_plt;
13146 case R_PPC64_COPY:
13147 return reloc_class_copy;
13148 default:
13149 return reloc_class_normal;
13150 }
13151 }
13152
13153 /* Finish up the dynamic sections. */
13154
13155 static bfd_boolean
13156 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13157 struct bfd_link_info *info)
13158 {
13159 struct ppc_link_hash_table *htab;
13160 bfd *dynobj;
13161 asection *sdyn;
13162
13163 htab = ppc_hash_table (info);
13164 if (htab == NULL)
13165 return FALSE;
13166
13167 dynobj = htab->elf.dynobj;
13168 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13169
13170 if (htab->elf.dynamic_sections_created)
13171 {
13172 Elf64_External_Dyn *dyncon, *dynconend;
13173
13174 if (sdyn == NULL || htab->got == NULL)
13175 abort ();
13176
13177 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13178 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13179 for (; dyncon < dynconend; dyncon++)
13180 {
13181 Elf_Internal_Dyn dyn;
13182 asection *s;
13183
13184 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13185
13186 switch (dyn.d_tag)
13187 {
13188 default:
13189 continue;
13190
13191 case DT_PPC64_GLINK:
13192 s = htab->glink;
13193 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13194 /* We stupidly defined DT_PPC64_GLINK to be the start
13195 of glink rather than the first entry point, which is
13196 what ld.so needs, and now have a bigger stub to
13197 support automatic multiple TOCs. */
13198 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13199 break;
13200
13201 case DT_PPC64_OPD:
13202 s = bfd_get_section_by_name (output_bfd, ".opd");
13203 if (s == NULL)
13204 continue;
13205 dyn.d_un.d_ptr = s->vma;
13206 break;
13207
13208 case DT_PPC64_OPDSZ:
13209 s = bfd_get_section_by_name (output_bfd, ".opd");
13210 if (s == NULL)
13211 continue;
13212 dyn.d_un.d_val = s->size;
13213 break;
13214
13215 case DT_PLTGOT:
13216 s = htab->plt;
13217 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13218 break;
13219
13220 case DT_JMPREL:
13221 s = htab->relplt;
13222 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13223 break;
13224
13225 case DT_PLTRELSZ:
13226 dyn.d_un.d_val = htab->relplt->size;
13227 break;
13228
13229 case DT_RELASZ:
13230 /* Don't count procedure linkage table relocs in the
13231 overall reloc count. */
13232 s = htab->relplt;
13233 if (s == NULL)
13234 continue;
13235 dyn.d_un.d_val -= s->size;
13236 break;
13237
13238 case DT_RELA:
13239 /* We may not be using the standard ELF linker script.
13240 If .rela.plt is the first .rela section, we adjust
13241 DT_RELA to not include it. */
13242 s = htab->relplt;
13243 if (s == NULL)
13244 continue;
13245 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13246 continue;
13247 dyn.d_un.d_ptr += s->size;
13248 break;
13249 }
13250
13251 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13252 }
13253 }
13254
13255 if (htab->got != NULL && htab->got->size != 0)
13256 {
13257 /* Fill in the first entry in the global offset table.
13258 We use it to hold the link-time TOCbase. */
13259 bfd_put_64 (output_bfd,
13260 elf_gp (output_bfd) + TOC_BASE_OFF,
13261 htab->got->contents);
13262
13263 /* Set .got entry size. */
13264 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13265 }
13266
13267 if (htab->plt != NULL && htab->plt->size != 0)
13268 {
13269 /* Set .plt entry size. */
13270 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13271 = PLT_ENTRY_SIZE;
13272 }
13273
13274 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13275 brlt ourselves if emitrelocations. */
13276 if (htab->brlt != NULL
13277 && htab->brlt->reloc_count != 0
13278 && !_bfd_elf_link_output_relocs (output_bfd,
13279 htab->brlt,
13280 &elf_section_data (htab->brlt)->rel_hdr,
13281 elf_section_data (htab->brlt)->relocs,
13282 NULL))
13283 return FALSE;
13284
13285 if (htab->glink != NULL
13286 && htab->glink->reloc_count != 0
13287 && !_bfd_elf_link_output_relocs (output_bfd,
13288 htab->glink,
13289 &elf_section_data (htab->glink)->rel_hdr,
13290 elf_section_data (htab->glink)->relocs,
13291 NULL))
13292 return FALSE;
13293
13294 /* We need to handle writing out multiple GOT sections ourselves,
13295 since we didn't add them to DYNOBJ. We know dynobj is the first
13296 bfd. */
13297 while ((dynobj = dynobj->link_next) != NULL)
13298 {
13299 asection *s;
13300
13301 if (!is_ppc64_elf (dynobj))
13302 continue;
13303
13304 s = ppc64_elf_tdata (dynobj)->got;
13305 if (s != NULL
13306 && s->size != 0
13307 && s->output_section != bfd_abs_section_ptr
13308 && !bfd_set_section_contents (output_bfd, s->output_section,
13309 s->contents, s->output_offset,
13310 s->size))
13311 return FALSE;
13312 s = ppc64_elf_tdata (dynobj)->relgot;
13313 if (s != NULL
13314 && s->size != 0
13315 && s->output_section != bfd_abs_section_ptr
13316 && !bfd_set_section_contents (output_bfd, s->output_section,
13317 s->contents, s->output_offset,
13318 s->size))
13319 return FALSE;
13320 }
13321
13322 return TRUE;
13323 }
13324
13325 #include "elf64-target.h"