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Add a target argument.
[binutils.git] / bfd / elf64-ppc.c
blob2073bdc11da94c62dbd7da3a7b4ca043b3c7e949
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_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x1000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
85 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
86 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88
89 #define elf_backend_object_p ppc64_elf_object_p
90 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
91 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
92 #define elf_backend_write_core_note ppc64_elf_write_core_note
93 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
94 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
95 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
96 #define elf_backend_check_directives ppc64_elf_process_dot_syms
97 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
98 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
99 #define elf_backend_check_relocs ppc64_elf_check_relocs
100 #define elf_backend_gc_keep ppc64_elf_gc_keep
101 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
102 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
103 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
104 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
105 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
106 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
107 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
108 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
109 #define elf_backend_action_discarded ppc64_elf_action_discarded
110 #define elf_backend_relocate_section ppc64_elf_relocate_section
111 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
112 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
113 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
114 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
115 #define elf_backend_special_sections ppc64_elf_special_sections
116 #define elf_backend_post_process_headers _bfd_elf_set_osabi
117
118 /* The name of the dynamic interpreter. This is put in the .interp
119 section. */
120 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
121
122 /* The size in bytes of an entry in the procedure linkage table. */
123 #define PLT_ENTRY_SIZE 24
124
125 /* The initial size of the plt reserved for the dynamic linker. */
126 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
127
128 /* TOC base pointers offset from start of TOC. */
129 #define TOC_BASE_OFF 0x8000
130
131 /* Offset of tp and dtp pointers from start of TLS block. */
132 #define TP_OFFSET 0x7000
133 #define DTP_OFFSET 0x8000
134
135 /* .plt call stub instructions. The normal stub is like this, but
136 sometimes the .plt entry crosses a 64k boundary and we need to
137 insert an addi to adjust r12. */
138 #define PLT_CALL_STUB_SIZE (7*4)
139 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
140 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
141 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
142 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
143 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
144 /* ld %r11,xxx+16@l(%r12) */
145 #define BCTR 0x4e800420 /* bctr */
146
147
148 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
149 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
150 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
151 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
152
153 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
154 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
155
156 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
157
158 /* glink call stub instructions. We enter with the index in R0. */
159 #define GLINK_CALL_STUB_SIZE (16*4)
160 /* 0: */
161 /* .quad plt0-1f */
162 /* __glink: */
163 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
164 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
165 /* 1: */
166 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
167 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
168 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
169 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
170 /* ld %11,0(%12) */
171 /* ld %2,8(%12) */
172 /* mtctr %11 */
173 /* ld %11,16(%12) */
174 /* bctr */
175
176 /* Pad with this. */
177 #define NOP 0x60000000
178
179 /* Some other nops. */
180 #define CROR_151515 0x4def7b82
181 #define CROR_313131 0x4ffffb82
182
183 /* .glink entries for the first 32k functions are two instructions. */
184 #define LI_R0_0 0x38000000 /* li %r0,0 */
185 #define B_DOT 0x48000000 /* b . */
186
187 /* After that, we need two instructions to load the index, followed by
188 a branch. */
189 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
190 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
191
192 /* Instructions used by the save and restore reg functions. */
193 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
194 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
195 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
196 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
197 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
198 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
199 #define LI_R12_0 0x39800000 /* li %r12,0 */
200 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
201 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
202 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
203 #define BLR 0x4e800020 /* blr */
204
205 /* Since .opd is an array of descriptors and each entry will end up
206 with identical R_PPC64_RELATIVE relocs, there is really no need to
207 propagate .opd relocs; The dynamic linker should be taught to
208 relocate .opd without reloc entries. */
209 #ifndef NO_OPD_RELOCS
210 #define NO_OPD_RELOCS 0
211 #endif
212 \f
213 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
214
215 /* Relocation HOWTO's. */
216 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
217
218 static reloc_howto_type ppc64_elf_howto_raw[] = {
219 /* This reloc does nothing. */
220 HOWTO (R_PPC64_NONE, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 32, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_dont, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_PPC64_NONE", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* A standard 32 bit relocation. */
235 HOWTO (R_PPC64_ADDR32, /* type */
236 0, /* rightshift */
237 2, /* size (0 = byte, 1 = short, 2 = long) */
238 32, /* bitsize */
239 FALSE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_bitfield, /* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_PPC64_ADDR32", /* name */
244 FALSE, /* partial_inplace */
245 0, /* src_mask */
246 0xffffffff, /* dst_mask */
247 FALSE), /* pcrel_offset */
248
249 /* An absolute 26 bit branch; the lower two bits must be zero.
250 FIXME: we don't check that, we just clear them. */
251 HOWTO (R_PPC64_ADDR24, /* type */
252 0, /* rightshift */
253 2, /* size (0 = byte, 1 = short, 2 = long) */
254 26, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_bitfield, /* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_PPC64_ADDR24", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0x03fffffc, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* A standard 16 bit relocation. */
266 HOWTO (R_PPC64_ADDR16, /* type */
267 0, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_bitfield, /* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC64_ADDR16", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0xffff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 /* A 16 bit relocation without overflow. */
281 HOWTO (R_PPC64_ADDR16_LO, /* type */
282 0, /* rightshift */
283 1, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont,/* complain_on_overflow */
288 bfd_elf_generic_reloc, /* special_function */
289 "R_PPC64_ADDR16_LO", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* Bits 16-31 of an address. */
296 HOWTO (R_PPC64_ADDR16_HI, /* type */
297 16, /* rightshift */
298 1, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_dont, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC64_ADDR16_HI", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xffff, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
311 bits, treated as a signed number, is negative. */
312 HOWTO (R_PPC64_ADDR16_HA, /* type */
313 16, /* rightshift */
314 1, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_dont, /* complain_on_overflow */
319 ppc64_elf_ha_reloc, /* special_function */
320 "R_PPC64_ADDR16_HA", /* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0xffff, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch; the lower two bits must be zero.
327 FIXME: we don't check that, we just clear them. */
328 HOWTO (R_PPC64_ADDR14, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 16, /* bitsize */
332 FALSE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_bitfield, /* complain_on_overflow */
335 ppc64_elf_branch_reloc, /* special_function */
336 "R_PPC64_ADDR14", /* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0x0000fffc, /* dst_mask */
340 FALSE), /* pcrel_offset */
341
342 /* An absolute 16 bit branch, for which bit 10 should be set to
343 indicate that the branch is expected to be taken. The lower two
344 bits must be zero. */
345 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 16, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_bitfield, /* complain_on_overflow */
352 ppc64_elf_brtaken_reloc, /* special_function */
353 "R_PPC64_ADDR14_BRTAKEN",/* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x0000fffc, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* An absolute 16 bit branch, for which bit 10 should be set to
360 indicate that the branch is not expected to be taken. The lower
361 two bits must be zero. */
362 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 16, /* bitsize */
366 FALSE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_bitfield, /* complain_on_overflow */
369 ppc64_elf_brtaken_reloc, /* special_function */
370 "R_PPC64_ADDR14_BRNTAKEN",/* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0x0000fffc, /* dst_mask */
374 FALSE), /* pcrel_offset */
375
376 /* A relative 26 bit branch; the lower two bits must be zero. */
377 HOWTO (R_PPC64_REL24, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 26, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_REL24", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x03fffffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch; the lower two bits must be zero. */
392 HOWTO (R_PPC64_REL14, /* type */
393 0, /* rightshift */
394 2, /* size (0 = byte, 1 = short, 2 = long) */
395 16, /* bitsize */
396 TRUE, /* pc_relative */
397 0, /* bitpos */
398 complain_overflow_signed, /* complain_on_overflow */
399 ppc64_elf_branch_reloc, /* special_function */
400 "R_PPC64_REL14", /* name */
401 FALSE, /* partial_inplace */
402 0, /* src_mask */
403 0x0000fffc, /* dst_mask */
404 TRUE), /* pcrel_offset */
405
406 /* A relative 16 bit branch. Bit 10 should be set to indicate that
407 the branch is expected to be taken. The lower two bits must be
408 zero. */
409 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
410 0, /* rightshift */
411 2, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 TRUE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_signed, /* complain_on_overflow */
416 ppc64_elf_brtaken_reloc, /* special_function */
417 "R_PPC64_REL14_BRTAKEN", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0x0000fffc, /* dst_mask */
421 TRUE), /* pcrel_offset */
422
423 /* A relative 16 bit branch. Bit 10 should be set to indicate that
424 the branch is not expected to be taken. The lower two bits must
425 be zero. */
426 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 TRUE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_brtaken_reloc, /* special_function */
434 "R_PPC64_REL14_BRNTAKEN",/* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0x0000fffc, /* dst_mask */
438 TRUE), /* pcrel_offset */
439
440 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
441 symbol. */
442 HOWTO (R_PPC64_GOT16, /* type */
443 0, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_signed, /* complain_on_overflow */
449 ppc64_elf_unhandled_reloc, /* special_function */
450 "R_PPC64_GOT16", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC64_GOT16_LO, /* type */
459 0, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc64_elf_unhandled_reloc, /* special_function */
466 "R_PPC64_GOT16_LO", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
473 the symbol. */
474 HOWTO (R_PPC64_GOT16_HI, /* type */
475 16, /* rightshift */
476 1, /* size (0 = byte, 1 = short, 2 = long) */
477 16, /* bitsize */
478 FALSE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_dont,/* complain_on_overflow */
481 ppc64_elf_unhandled_reloc, /* special_function */
482 "R_PPC64_GOT16_HI", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0xffff, /* dst_mask */
486 FALSE), /* pcrel_offset */
487
488 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
489 the symbol. */
490 HOWTO (R_PPC64_GOT16_HA, /* type */
491 16, /* rightshift */
492 1, /* size (0 = byte, 1 = short, 2 = long) */
493 16, /* bitsize */
494 FALSE, /* pc_relative */
495 0, /* bitpos */
496 complain_overflow_dont,/* complain_on_overflow */
497 ppc64_elf_unhandled_reloc, /* special_function */
498 "R_PPC64_GOT16_HA", /* name */
499 FALSE, /* partial_inplace */
500 0, /* src_mask */
501 0xffff, /* dst_mask */
502 FALSE), /* pcrel_offset */
503
504 /* This is used only by the dynamic linker. The symbol should exist
505 both in the object being run and in some shared library. The
506 dynamic linker copies the data addressed by the symbol from the
507 shared library into the object, because the object being
508 run has to have the data at some particular address. */
509 HOWTO (R_PPC64_COPY, /* type */
510 0, /* rightshift */
511 0, /* this one is variable size */
512 0, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc64_elf_unhandled_reloc, /* special_function */
517 "R_PPC64_COPY", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Like R_PPC64_ADDR64, but used when setting global offset table
524 entries. */
525 HOWTO (R_PPC64_GLOB_DAT, /* type */
526 0, /* rightshift */
527 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
528 64, /* bitsize */
529 FALSE, /* pc_relative */
530 0, /* bitpos */
531 complain_overflow_dont, /* complain_on_overflow */
532 ppc64_elf_unhandled_reloc, /* special_function */
533 "R_PPC64_GLOB_DAT", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 ONES (64), /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 /* Created by the link editor. Marks a procedure linkage table
540 entry for a symbol. */
541 HOWTO (R_PPC64_JMP_SLOT, /* type */
542 0, /* rightshift */
543 0, /* size (0 = byte, 1 = short, 2 = long) */
544 0, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 ppc64_elf_unhandled_reloc, /* special_function */
549 "R_PPC64_JMP_SLOT", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Used only by the dynamic linker. When the object is run, this
556 doubleword64 is set to the load address of the object, plus the
557 addend. */
558 HOWTO (R_PPC64_RELATIVE, /* type */
559 0, /* rightshift */
560 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
561 64, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC64_RELATIVE", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 ONES (64), /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC64_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_bitfield, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC64_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC64_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC64_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative. */
603 HOWTO (R_PPC64_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 /* FIXME: Verify. Was complain_overflow_bitfield. */
610 complain_overflow_signed, /* complain_on_overflow */
611 bfd_elf_generic_reloc, /* special_function */
612 "R_PPC64_REL32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 TRUE), /* pcrel_offset */
617
618 /* 32-bit relocation to the symbol's procedure linkage table. */
619 HOWTO (R_PPC64_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_bitfield, /* complain_on_overflow */
626 ppc64_elf_unhandled_reloc, /* special_function */
627 "R_PPC64_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0xffffffff, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: R_PPC64_PLTREL32 not supported. */
635 HOWTO (R_PPC64_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_signed, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC64_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0xffffffff, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC64_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc64_elf_unhandled_reloc, /* special_function */
659 "R_PPC64_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC64_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC64_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc64_elf_unhandled_reloc, /* special_function */
691 "R_PPC64_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* 16-bit section relative relocation. */
698 HOWTO (R_PPC64_SECTOFF, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_bitfield, /* complain_on_overflow */
705 ppc64_elf_sectoff_reloc, /* special_function */
706 "R_PPC64_SECTOFF", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* Like R_PPC64_SECTOFF, but no overflow warning. */
713 HOWTO (R_PPC64_SECTOFF_LO, /* type */
714 0, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont, /* complain_on_overflow */
720 ppc64_elf_sectoff_reloc, /* special_function */
721 "R_PPC64_SECTOFF_LO", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit upper half section relative relocation. */
728 HOWTO (R_PPC64_SECTOFF_HI, /* type */
729 16, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc64_elf_sectoff_reloc, /* special_function */
736 "R_PPC64_SECTOFF_HI", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* 16-bit upper half adjusted section relative relocation. */
743 HOWTO (R_PPC64_SECTOFF_HA, /* type */
744 16, /* rightshift */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
746 16, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 ppc64_elf_sectoff_ha_reloc, /* special_function */
751 "R_PPC64_SECTOFF_HA", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* Like R_PPC64_REL24 without touching the two least significant bits. */
758 HOWTO (R_PPC64_REL30, /* type */
759 2, /* rightshift */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
761 30, /* bitsize */
762 TRUE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_dont, /* complain_on_overflow */
765 bfd_elf_generic_reloc, /* special_function */
766 "R_PPC64_REL30", /* name */
767 FALSE, /* partial_inplace */
768 0, /* src_mask */
769 0xfffffffc, /* dst_mask */
770 TRUE), /* pcrel_offset */
771
772 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
773
774 /* A standard 64-bit relocation. */
775 HOWTO (R_PPC64_ADDR64, /* type */
776 0, /* rightshift */
777 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
778 64, /* bitsize */
779 FALSE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_PPC64_ADDR64", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 ONES (64), /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 32-47 of an address. */
790 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
791 32, /* rightshift */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
793 16, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_PPC64_ADDR16_HIGHER", /* name */
799 FALSE, /* partial_inplace */
800 0, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* The bits 32-47 of an address, plus 1 if the contents of the low
805 16 bits, treated as a signed number, is negative. */
806 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
807 32, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 ppc64_elf_ha_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHERA", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The bits 48-63 of an address. */
821 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
822 48, /* rightshift */
823 1, /* size (0 = byte, 1 = short, 2 = long) */
824 16, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_PPC64_ADDR16_HIGHEST", /* name */
830 FALSE, /* partial_inplace */
831 0, /* src_mask */
832 0xffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* The bits 48-63 of an address, plus 1 if the contents of the low
836 16 bits, treated as a signed number, is negative. */
837 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
838 48, /* rightshift */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
840 16, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont, /* complain_on_overflow */
844 ppc64_elf_ha_reloc, /* special_function */
845 "R_PPC64_ADDR16_HIGHESTA", /* name */
846 FALSE, /* partial_inplace */
847 0, /* src_mask */
848 0xffff, /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* Like ADDR64, but may be unaligned. */
852 HOWTO (R_PPC64_UADDR64, /* type */
853 0, /* rightshift */
854 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
855 64, /* bitsize */
856 FALSE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_PPC64_UADDR64", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 ONES (64), /* dst_mask */
864 FALSE), /* pcrel_offset */
865
866 /* 64-bit relative relocation. */
867 HOWTO (R_PPC64_REL64, /* type */
868 0, /* rightshift */
869 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
870 64, /* bitsize */
871 TRUE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 bfd_elf_generic_reloc, /* special_function */
875 "R_PPC64_REL64", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 ONES (64), /* dst_mask */
879 TRUE), /* pcrel_offset */
880
881 /* 64-bit relocation to the symbol's procedure linkage table. */
882 HOWTO (R_PPC64_PLT64, /* type */
883 0, /* rightshift */
884 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
885 64, /* bitsize */
886 FALSE, /* pc_relative */
887 0, /* bitpos */
888 complain_overflow_dont, /* complain_on_overflow */
889 ppc64_elf_unhandled_reloc, /* special_function */
890 "R_PPC64_PLT64", /* name */
891 FALSE, /* partial_inplace */
892 0, /* src_mask */
893 ONES (64), /* dst_mask */
894 FALSE), /* pcrel_offset */
895
896 /* 64-bit PC relative relocation to the symbol's procedure linkage
897 table. */
898 /* FIXME: R_PPC64_PLTREL64 not supported. */
899 HOWTO (R_PPC64_PLTREL64, /* type */
900 0, /* rightshift */
901 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
902 64, /* bitsize */
903 TRUE, /* pc_relative */
904 0, /* bitpos */
905 complain_overflow_dont, /* complain_on_overflow */
906 ppc64_elf_unhandled_reloc, /* special_function */
907 "R_PPC64_PLTREL64", /* name */
908 FALSE, /* partial_inplace */
909 0, /* src_mask */
910 ONES (64), /* dst_mask */
911 TRUE), /* pcrel_offset */
912
913 /* 16 bit TOC-relative relocation. */
914
915 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
916 HOWTO (R_PPC64_TOC16, /* type */
917 0, /* rightshift */
918 1, /* size (0 = byte, 1 = short, 2 = long) */
919 16, /* bitsize */
920 FALSE, /* pc_relative */
921 0, /* bitpos */
922 complain_overflow_signed, /* complain_on_overflow */
923 ppc64_elf_toc_reloc, /* special_function */
924 "R_PPC64_TOC16", /* name */
925 FALSE, /* partial_inplace */
926 0, /* src_mask */
927 0xffff, /* dst_mask */
928 FALSE), /* pcrel_offset */
929
930 /* 16 bit TOC-relative relocation without overflow. */
931
932 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
933 HOWTO (R_PPC64_TOC16_LO, /* type */
934 0, /* rightshift */
935 1, /* size (0 = byte, 1 = short, 2 = long) */
936 16, /* bitsize */
937 FALSE, /* pc_relative */
938 0, /* bitpos */
939 complain_overflow_dont, /* complain_on_overflow */
940 ppc64_elf_toc_reloc, /* special_function */
941 "R_PPC64_TOC16_LO", /* name */
942 FALSE, /* partial_inplace */
943 0, /* src_mask */
944 0xffff, /* dst_mask */
945 FALSE), /* pcrel_offset */
946
947 /* 16 bit TOC-relative relocation, high 16 bits. */
948
949 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
950 HOWTO (R_PPC64_TOC16_HI, /* type */
951 16, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc64_elf_toc_reloc, /* special_function */
958 "R_PPC64_TOC16_HI", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
965 contents of the low 16 bits, treated as a signed number, is
966 negative. */
967
968 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
969 HOWTO (R_PPC64_TOC16_HA, /* type */
970 16, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_dont, /* complain_on_overflow */
976 ppc64_elf_toc_ha_reloc, /* special_function */
977 "R_PPC64_TOC16_HA", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 64-bit relocation; insert value of TOC base (.TOC.). */
984
985 /* R_PPC64_TOC 51 doubleword64 .TOC. */
986 HOWTO (R_PPC64_TOC, /* type */
987 0, /* rightshift */
988 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
989 64, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_bitfield, /* complain_on_overflow */
993 ppc64_elf_toc64_reloc, /* special_function */
994 "R_PPC64_TOC", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 ONES (64), /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* Like R_PPC64_GOT16, but also informs the link editor that the
1001 value to relocate may (!) refer to a PLT entry which the link
1002 editor (a) may replace with the symbol value. If the link editor
1003 is unable to fully resolve the symbol, it may (b) create a PLT
1004 entry and store the address to the new PLT entry in the GOT.
1005 This permits lazy resolution of function symbols at run time.
1006 The link editor may also skip all of this and just (c) emit a
1007 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1008 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1009 HOWTO (R_PPC64_PLTGOT16, /* type */
1010 0, /* rightshift */
1011 1, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_signed, /* complain_on_overflow */
1016 ppc64_elf_unhandled_reloc, /* special_function */
1017 "R_PPC64_PLTGOT16", /* name */
1018 FALSE, /* partial_inplace */
1019 0, /* src_mask */
1020 0xffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 /* Like R_PPC64_PLTGOT16, but without overflow. */
1024 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1025 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1026 0, /* rightshift */
1027 1, /* size (0 = byte, 1 = short, 2 = long) */
1028 16, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_dont, /* complain_on_overflow */
1032 ppc64_elf_unhandled_reloc, /* special_function */
1033 "R_PPC64_PLTGOT16_LO", /* name */
1034 FALSE, /* partial_inplace */
1035 0, /* src_mask */
1036 0xffff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1040 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1041 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1042 16, /* rightshift */
1043 1, /* size (0 = byte, 1 = short, 2 = long) */
1044 16, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_dont, /* complain_on_overflow */
1048 ppc64_elf_unhandled_reloc, /* special_function */
1049 "R_PPC64_PLTGOT16_HI", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 0xffff, /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1056 1 if the contents of the low 16 bits, treated as a signed number,
1057 is negative. */
1058 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1059 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1060 16, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_dont,/* complain_on_overflow */
1066 ppc64_elf_unhandled_reloc, /* special_function */
1067 "R_PPC64_PLTGOT16_HA", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xffff, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1074 HOWTO (R_PPC64_ADDR16_DS, /* type */
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_bitfield, /* complain_on_overflow */
1081 bfd_elf_generic_reloc, /* special_function */
1082 "R_PPC64_ADDR16_DS", /* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xfffc, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1089 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1090 0, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_dont,/* complain_on_overflow */
1096 bfd_elf_generic_reloc, /* special_function */
1097 "R_PPC64_ADDR16_LO_DS",/* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xfffc, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1104 HOWTO (R_PPC64_GOT16_DS, /* type */
1105 0, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_signed, /* complain_on_overflow */
1111 ppc64_elf_unhandled_reloc, /* special_function */
1112 "R_PPC64_GOT16_DS", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xfffc, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1119 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_dont, /* complain_on_overflow */
1126 ppc64_elf_unhandled_reloc, /* special_function */
1127 "R_PPC64_GOT16_LO_DS", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xfffc, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1134 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc64_elf_unhandled_reloc, /* special_function */
1142 "R_PPC64_PLT16_LO_DS", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xfffc, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1149 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1150 0, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_bitfield, /* complain_on_overflow */
1156 ppc64_elf_sectoff_reloc, /* special_function */
1157 "R_PPC64_SECTOFF_DS", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xfffc, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1164 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc64_elf_sectoff_reloc, /* special_function */
1172 "R_PPC64_SECTOFF_LO_DS",/* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xfffc, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1179 HOWTO (R_PPC64_TOC16_DS, /* type */
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_signed, /* complain_on_overflow */
1186 ppc64_elf_toc_reloc, /* special_function */
1187 "R_PPC64_TOC16_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1194 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1195 0, /* rightshift */
1196 1, /* size (0 = byte, 1 = short, 2 = long) */
1197 16, /* bitsize */
1198 FALSE, /* pc_relative */
1199 0, /* bitpos */
1200 complain_overflow_dont, /* complain_on_overflow */
1201 ppc64_elf_toc_reloc, /* special_function */
1202 "R_PPC64_TOC16_LO_DS", /* name */
1203 FALSE, /* partial_inplace */
1204 0, /* src_mask */
1205 0xfffc, /* dst_mask */
1206 FALSE), /* pcrel_offset */
1207
1208 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1209 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1210 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1211 0, /* rightshift */
1212 1, /* size (0 = byte, 1 = short, 2 = long) */
1213 16, /* bitsize */
1214 FALSE, /* pc_relative */
1215 0, /* bitpos */
1216 complain_overflow_signed, /* complain_on_overflow */
1217 ppc64_elf_unhandled_reloc, /* special_function */
1218 "R_PPC64_PLTGOT16_DS", /* name */
1219 FALSE, /* partial_inplace */
1220 0, /* src_mask */
1221 0xfffc, /* dst_mask */
1222 FALSE), /* pcrel_offset */
1223
1224 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1225 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1226 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1227 0, /* rightshift */
1228 1, /* size (0 = byte, 1 = short, 2 = long) */
1229 16, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 ppc64_elf_unhandled_reloc, /* special_function */
1234 "R_PPC64_PLTGOT16_LO_DS",/* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0xfffc, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Marker relocs for TLS. */
1241 HOWTO (R_PPC64_TLS,
1242 0, /* rightshift */
1243 2, /* size (0 = byte, 1 = short, 2 = long) */
1244 32, /* bitsize */
1245 FALSE, /* pc_relative */
1246 0, /* bitpos */
1247 complain_overflow_dont, /* complain_on_overflow */
1248 bfd_elf_generic_reloc, /* special_function */
1249 "R_PPC64_TLS", /* name */
1250 FALSE, /* partial_inplace */
1251 0, /* src_mask */
1252 0, /* dst_mask */
1253 FALSE), /* pcrel_offset */
1254
1255 HOWTO (R_PPC64_TLSGD,
1256 0, /* rightshift */
1257 2, /* size (0 = byte, 1 = short, 2 = long) */
1258 32, /* bitsize */
1259 FALSE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_dont, /* complain_on_overflow */
1262 bfd_elf_generic_reloc, /* special_function */
1263 "R_PPC64_TLSGD", /* name */
1264 FALSE, /* partial_inplace */
1265 0, /* src_mask */
1266 0, /* dst_mask */
1267 FALSE), /* pcrel_offset */
1268
1269 HOWTO (R_PPC64_TLSLD,
1270 0, /* rightshift */
1271 2, /* size (0 = byte, 1 = short, 2 = long) */
1272 32, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_dont, /* complain_on_overflow */
1276 bfd_elf_generic_reloc, /* special_function */
1277 "R_PPC64_TLSLD", /* name */
1278 FALSE, /* partial_inplace */
1279 0, /* src_mask */
1280 0, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 /* Computes the load module index of the load module that contains the
1284 definition of its TLS sym. */
1285 HOWTO (R_PPC64_DTPMOD64,
1286 0, /* rightshift */
1287 4, /* size (0 = byte, 1 = short, 2 = long) */
1288 64, /* bitsize */
1289 FALSE, /* pc_relative */
1290 0, /* bitpos */
1291 complain_overflow_dont, /* complain_on_overflow */
1292 ppc64_elf_unhandled_reloc, /* special_function */
1293 "R_PPC64_DTPMOD64", /* name */
1294 FALSE, /* partial_inplace */
1295 0, /* src_mask */
1296 ONES (64), /* dst_mask */
1297 FALSE), /* pcrel_offset */
1298
1299 /* Computes a dtv-relative displacement, the difference between the value
1300 of sym+add and the base address of the thread-local storage block that
1301 contains the definition of sym, minus 0x8000. */
1302 HOWTO (R_PPC64_DTPREL64,
1303 0, /* rightshift */
1304 4, /* size (0 = byte, 1 = short, 2 = long) */
1305 64, /* bitsize */
1306 FALSE, /* pc_relative */
1307 0, /* bitpos */
1308 complain_overflow_dont, /* complain_on_overflow */
1309 ppc64_elf_unhandled_reloc, /* special_function */
1310 "R_PPC64_DTPREL64", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 ONES (64), /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* A 16 bit dtprel reloc. */
1317 HOWTO (R_PPC64_DTPREL16,
1318 0, /* rightshift */
1319 1, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_signed, /* complain_on_overflow */
1324 ppc64_elf_unhandled_reloc, /* special_function */
1325 "R_PPC64_DTPREL16", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* Like DTPREL16, but no overflow. */
1332 HOWTO (R_PPC64_DTPREL16_LO,
1333 0, /* rightshift */
1334 1, /* size (0 = byte, 1 = short, 2 = long) */
1335 16, /* bitsize */
1336 FALSE, /* pc_relative */
1337 0, /* bitpos */
1338 complain_overflow_dont, /* complain_on_overflow */
1339 ppc64_elf_unhandled_reloc, /* special_function */
1340 "R_PPC64_DTPREL16_LO", /* name */
1341 FALSE, /* partial_inplace */
1342 0, /* src_mask */
1343 0xffff, /* dst_mask */
1344 FALSE), /* pcrel_offset */
1345
1346 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1347 HOWTO (R_PPC64_DTPREL16_HI,
1348 16, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPREL16_HI", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1362 HOWTO (R_PPC64_DTPREL16_HA,
1363 16, /* rightshift */
1364 1, /* size (0 = byte, 1 = short, 2 = long) */
1365 16, /* bitsize */
1366 FALSE, /* pc_relative */
1367 0, /* bitpos */
1368 complain_overflow_dont, /* complain_on_overflow */
1369 ppc64_elf_unhandled_reloc, /* special_function */
1370 "R_PPC64_DTPREL16_HA", /* name */
1371 FALSE, /* partial_inplace */
1372 0, /* src_mask */
1373 0xffff, /* dst_mask */
1374 FALSE), /* pcrel_offset */
1375
1376 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1377 HOWTO (R_PPC64_DTPREL16_HIGHER,
1378 32, /* rightshift */
1379 1, /* size (0 = byte, 1 = short, 2 = long) */
1380 16, /* bitsize */
1381 FALSE, /* pc_relative */
1382 0, /* bitpos */
1383 complain_overflow_dont, /* complain_on_overflow */
1384 ppc64_elf_unhandled_reloc, /* special_function */
1385 "R_PPC64_DTPREL16_HIGHER", /* name */
1386 FALSE, /* partial_inplace */
1387 0, /* src_mask */
1388 0xffff, /* dst_mask */
1389 FALSE), /* pcrel_offset */
1390
1391 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1392 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1393 32, /* rightshift */
1394 1, /* size (0 = byte, 1 = short, 2 = long) */
1395 16, /* bitsize */
1396 FALSE, /* pc_relative */
1397 0, /* bitpos */
1398 complain_overflow_dont, /* complain_on_overflow */
1399 ppc64_elf_unhandled_reloc, /* special_function */
1400 "R_PPC64_DTPREL16_HIGHERA", /* name */
1401 FALSE, /* partial_inplace */
1402 0, /* src_mask */
1403 0xffff, /* dst_mask */
1404 FALSE), /* pcrel_offset */
1405
1406 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1407 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1408 48, /* rightshift */
1409 1, /* size (0 = byte, 1 = short, 2 = long) */
1410 16, /* bitsize */
1411 FALSE, /* pc_relative */
1412 0, /* bitpos */
1413 complain_overflow_dont, /* complain_on_overflow */
1414 ppc64_elf_unhandled_reloc, /* special_function */
1415 "R_PPC64_DTPREL16_HIGHEST", /* name */
1416 FALSE, /* partial_inplace */
1417 0, /* src_mask */
1418 0xffff, /* dst_mask */
1419 FALSE), /* pcrel_offset */
1420
1421 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1422 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1423 48, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_dont, /* complain_on_overflow */
1429 ppc64_elf_unhandled_reloc, /* special_function */
1430 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xffff, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* Like DTPREL16, but for insns with a DS field. */
1437 HOWTO (R_PPC64_DTPREL16_DS,
1438 0, /* rightshift */
1439 1, /* size (0 = byte, 1 = short, 2 = long) */
1440 16, /* bitsize */
1441 FALSE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_signed, /* complain_on_overflow */
1444 ppc64_elf_unhandled_reloc, /* special_function */
1445 "R_PPC64_DTPREL16_DS", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 0xfffc, /* dst_mask */
1449 FALSE), /* pcrel_offset */
1450
1451 /* Like DTPREL16_DS, but no overflow. */
1452 HOWTO (R_PPC64_DTPREL16_LO_DS,
1453 0, /* rightshift */
1454 1, /* size (0 = byte, 1 = short, 2 = long) */
1455 16, /* bitsize */
1456 FALSE, /* pc_relative */
1457 0, /* bitpos */
1458 complain_overflow_dont, /* complain_on_overflow */
1459 ppc64_elf_unhandled_reloc, /* special_function */
1460 "R_PPC64_DTPREL16_LO_DS", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xfffc, /* dst_mask */
1464 FALSE), /* pcrel_offset */
1465
1466 /* Computes a tp-relative displacement, the difference between the value of
1467 sym+add and the value of the thread pointer (r13). */
1468 HOWTO (R_PPC64_TPREL64,
1469 0, /* rightshift */
1470 4, /* size (0 = byte, 1 = short, 2 = long) */
1471 64, /* bitsize */
1472 FALSE, /* pc_relative */
1473 0, /* bitpos */
1474 complain_overflow_dont, /* complain_on_overflow */
1475 ppc64_elf_unhandled_reloc, /* special_function */
1476 "R_PPC64_TPREL64", /* name */
1477 FALSE, /* partial_inplace */
1478 0, /* src_mask */
1479 ONES (64), /* dst_mask */
1480 FALSE), /* pcrel_offset */
1481
1482 /* A 16 bit tprel reloc. */
1483 HOWTO (R_PPC64_TPREL16,
1484 0, /* rightshift */
1485 1, /* size (0 = byte, 1 = short, 2 = long) */
1486 16, /* bitsize */
1487 FALSE, /* pc_relative */
1488 0, /* bitpos */
1489 complain_overflow_signed, /* complain_on_overflow */
1490 ppc64_elf_unhandled_reloc, /* special_function */
1491 "R_PPC64_TPREL16", /* name */
1492 FALSE, /* partial_inplace */
1493 0, /* src_mask */
1494 0xffff, /* dst_mask */
1495 FALSE), /* pcrel_offset */
1496
1497 /* Like TPREL16, but no overflow. */
1498 HOWTO (R_PPC64_TPREL16_LO,
1499 0, /* rightshift */
1500 1, /* size (0 = byte, 1 = short, 2 = long) */
1501 16, /* bitsize */
1502 FALSE, /* pc_relative */
1503 0, /* bitpos */
1504 complain_overflow_dont, /* complain_on_overflow */
1505 ppc64_elf_unhandled_reloc, /* special_function */
1506 "R_PPC64_TPREL16_LO", /* name */
1507 FALSE, /* partial_inplace */
1508 0, /* src_mask */
1509 0xffff, /* dst_mask */
1510 FALSE), /* pcrel_offset */
1511
1512 /* Like TPREL16_LO, but next higher group of 16 bits. */
1513 HOWTO (R_PPC64_TPREL16_HI,
1514 16, /* rightshift */
1515 1, /* size (0 = byte, 1 = short, 2 = long) */
1516 16, /* bitsize */
1517 FALSE, /* pc_relative */
1518 0, /* bitpos */
1519 complain_overflow_dont, /* complain_on_overflow */
1520 ppc64_elf_unhandled_reloc, /* special_function */
1521 "R_PPC64_TPREL16_HI", /* name */
1522 FALSE, /* partial_inplace */
1523 0, /* src_mask */
1524 0xffff, /* dst_mask */
1525 FALSE), /* pcrel_offset */
1526
1527 /* Like TPREL16_HI, but adjust for low 16 bits. */
1528 HOWTO (R_PPC64_TPREL16_HA,
1529 16, /* rightshift */
1530 1, /* size (0 = byte, 1 = short, 2 = long) */
1531 16, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_dont, /* complain_on_overflow */
1535 ppc64_elf_unhandled_reloc, /* special_function */
1536 "R_PPC64_TPREL16_HA", /* name */
1537 FALSE, /* partial_inplace */
1538 0, /* src_mask */
1539 0xffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 /* Like TPREL16_HI, but next higher group of 16 bits. */
1543 HOWTO (R_PPC64_TPREL16_HIGHER,
1544 32, /* rightshift */
1545 1, /* size (0 = byte, 1 = short, 2 = long) */
1546 16, /* bitsize */
1547 FALSE, /* pc_relative */
1548 0, /* bitpos */
1549 complain_overflow_dont, /* complain_on_overflow */
1550 ppc64_elf_unhandled_reloc, /* special_function */
1551 "R_PPC64_TPREL16_HIGHER", /* name */
1552 FALSE, /* partial_inplace */
1553 0, /* src_mask */
1554 0xffff, /* dst_mask */
1555 FALSE), /* pcrel_offset */
1556
1557 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1558 HOWTO (R_PPC64_TPREL16_HIGHERA,
1559 32, /* rightshift */
1560 1, /* size (0 = byte, 1 = short, 2 = long) */
1561 16, /* bitsize */
1562 FALSE, /* pc_relative */
1563 0, /* bitpos */
1564 complain_overflow_dont, /* complain_on_overflow */
1565 ppc64_elf_unhandled_reloc, /* special_function */
1566 "R_PPC64_TPREL16_HIGHERA", /* name */
1567 FALSE, /* partial_inplace */
1568 0, /* src_mask */
1569 0xffff, /* dst_mask */
1570 FALSE), /* pcrel_offset */
1571
1572 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1573 HOWTO (R_PPC64_TPREL16_HIGHEST,
1574 48, /* rightshift */
1575 1, /* size (0 = byte, 1 = short, 2 = long) */
1576 16, /* bitsize */
1577 FALSE, /* pc_relative */
1578 0, /* bitpos */
1579 complain_overflow_dont, /* complain_on_overflow */
1580 ppc64_elf_unhandled_reloc, /* special_function */
1581 "R_PPC64_TPREL16_HIGHEST", /* name */
1582 FALSE, /* partial_inplace */
1583 0, /* src_mask */
1584 0xffff, /* dst_mask */
1585 FALSE), /* pcrel_offset */
1586
1587 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1588 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1589 48, /* rightshift */
1590 1, /* size (0 = byte, 1 = short, 2 = long) */
1591 16, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_dont, /* complain_on_overflow */
1595 ppc64_elf_unhandled_reloc, /* special_function */
1596 "R_PPC64_TPREL16_HIGHESTA", /* name */
1597 FALSE, /* partial_inplace */
1598 0, /* src_mask */
1599 0xffff, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601
1602 /* Like TPREL16, but for insns with a DS field. */
1603 HOWTO (R_PPC64_TPREL16_DS,
1604 0, /* rightshift */
1605 1, /* size (0 = byte, 1 = short, 2 = long) */
1606 16, /* bitsize */
1607 FALSE, /* pc_relative */
1608 0, /* bitpos */
1609 complain_overflow_signed, /* complain_on_overflow */
1610 ppc64_elf_unhandled_reloc, /* special_function */
1611 "R_PPC64_TPREL16_DS", /* name */
1612 FALSE, /* partial_inplace */
1613 0, /* src_mask */
1614 0xfffc, /* dst_mask */
1615 FALSE), /* pcrel_offset */
1616
1617 /* Like TPREL16_DS, but no overflow. */
1618 HOWTO (R_PPC64_TPREL16_LO_DS,
1619 0, /* rightshift */
1620 1, /* size (0 = byte, 1 = short, 2 = long) */
1621 16, /* bitsize */
1622 FALSE, /* pc_relative */
1623 0, /* bitpos */
1624 complain_overflow_dont, /* complain_on_overflow */
1625 ppc64_elf_unhandled_reloc, /* special_function */
1626 "R_PPC64_TPREL16_LO_DS", /* name */
1627 FALSE, /* partial_inplace */
1628 0, /* src_mask */
1629 0xfffc, /* dst_mask */
1630 FALSE), /* pcrel_offset */
1631
1632 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1633 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1634 to the first entry relative to the TOC base (r2). */
1635 HOWTO (R_PPC64_GOT_TLSGD16,
1636 0, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_signed, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_GOT_TLSGD16", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like GOT_TLSGD16, but no overflow. */
1650 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1651 0, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_GOT_TLSGD16_LO", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1665 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1666 16, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_dont, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_GOT_TLSGD16_HI", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xffff, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1680 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1681 16, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_GOT_TLSGD16_HA", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xffff, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1695 with values (sym+add)@dtpmod and zero, and computes the offset to the
1696 first entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_TLSLD16,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSLD16", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSLD16, but no overflow. */
1712 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSLD16_LO", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_dont, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_TLSLD16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_dont, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_TLSLD16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1757 the offset to the entry relative to the TOC base (r2). */
1758 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1759 0, /* rightshift */
1760 1, /* size (0 = byte, 1 = short, 2 = long) */
1761 16, /* bitsize */
1762 FALSE, /* pc_relative */
1763 0, /* bitpos */
1764 complain_overflow_signed, /* complain_on_overflow */
1765 ppc64_elf_unhandled_reloc, /* special_function */
1766 "R_PPC64_GOT_DTPREL16_DS", /* name */
1767 FALSE, /* partial_inplace */
1768 0, /* src_mask */
1769 0xfffc, /* dst_mask */
1770 FALSE), /* pcrel_offset */
1771
1772 /* Like GOT_DTPREL16_DS, but no overflow. */
1773 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1774 0, /* rightshift */
1775 1, /* size (0 = byte, 1 = short, 2 = long) */
1776 16, /* bitsize */
1777 FALSE, /* pc_relative */
1778 0, /* bitpos */
1779 complain_overflow_dont, /* complain_on_overflow */
1780 ppc64_elf_unhandled_reloc, /* special_function */
1781 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1782 FALSE, /* partial_inplace */
1783 0, /* src_mask */
1784 0xfffc, /* dst_mask */
1785 FALSE), /* pcrel_offset */
1786
1787 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1788 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1789 16, /* rightshift */
1790 1, /* size (0 = byte, 1 = short, 2 = long) */
1791 16, /* bitsize */
1792 FALSE, /* pc_relative */
1793 0, /* bitpos */
1794 complain_overflow_dont, /* complain_on_overflow */
1795 ppc64_elf_unhandled_reloc, /* special_function */
1796 "R_PPC64_GOT_DTPREL16_HI", /* name */
1797 FALSE, /* partial_inplace */
1798 0, /* src_mask */
1799 0xffff, /* dst_mask */
1800 FALSE), /* pcrel_offset */
1801
1802 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1803 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1804 16, /* rightshift */
1805 1, /* size (0 = byte, 1 = short, 2 = long) */
1806 16, /* bitsize */
1807 FALSE, /* pc_relative */
1808 0, /* bitpos */
1809 complain_overflow_dont, /* complain_on_overflow */
1810 ppc64_elf_unhandled_reloc, /* special_function */
1811 "R_PPC64_GOT_DTPREL16_HA", /* name */
1812 FALSE, /* partial_inplace */
1813 0, /* src_mask */
1814 0xffff, /* dst_mask */
1815 FALSE), /* pcrel_offset */
1816
1817 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1818 offset to the entry relative to the TOC base (r2). */
1819 HOWTO (R_PPC64_GOT_TPREL16_DS,
1820 0, /* rightshift */
1821 1, /* size (0 = byte, 1 = short, 2 = long) */
1822 16, /* bitsize */
1823 FALSE, /* pc_relative */
1824 0, /* bitpos */
1825 complain_overflow_signed, /* complain_on_overflow */
1826 ppc64_elf_unhandled_reloc, /* special_function */
1827 "R_PPC64_GOT_TPREL16_DS", /* name */
1828 FALSE, /* partial_inplace */
1829 0, /* src_mask */
1830 0xfffc, /* dst_mask */
1831 FALSE), /* pcrel_offset */
1832
1833 /* Like GOT_TPREL16_DS, but no overflow. */
1834 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1835 0, /* rightshift */
1836 1, /* size (0 = byte, 1 = short, 2 = long) */
1837 16, /* bitsize */
1838 FALSE, /* pc_relative */
1839 0, /* bitpos */
1840 complain_overflow_dont, /* complain_on_overflow */
1841 ppc64_elf_unhandled_reloc, /* special_function */
1842 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1843 FALSE, /* partial_inplace */
1844 0, /* src_mask */
1845 0xfffc, /* dst_mask */
1846 FALSE), /* pcrel_offset */
1847
1848 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1849 HOWTO (R_PPC64_GOT_TPREL16_HI,
1850 16, /* rightshift */
1851 1, /* size (0 = byte, 1 = short, 2 = long) */
1852 16, /* bitsize */
1853 FALSE, /* pc_relative */
1854 0, /* bitpos */
1855 complain_overflow_dont, /* complain_on_overflow */
1856 ppc64_elf_unhandled_reloc, /* special_function */
1857 "R_PPC64_GOT_TPREL16_HI", /* name */
1858 FALSE, /* partial_inplace */
1859 0, /* src_mask */
1860 0xffff, /* dst_mask */
1861 FALSE), /* pcrel_offset */
1862
1863 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1864 HOWTO (R_PPC64_GOT_TPREL16_HA,
1865 16, /* rightshift */
1866 1, /* size (0 = byte, 1 = short, 2 = long) */
1867 16, /* bitsize */
1868 FALSE, /* pc_relative */
1869 0, /* bitpos */
1870 complain_overflow_dont, /* complain_on_overflow */
1871 ppc64_elf_unhandled_reloc, /* special_function */
1872 "R_PPC64_GOT_TPREL16_HA", /* name */
1873 FALSE, /* partial_inplace */
1874 0, /* src_mask */
1875 0xffff, /* dst_mask */
1876 FALSE), /* pcrel_offset */
1877
1878 HOWTO (R_PPC64_JMP_IREL, /* type */
1879 0, /* rightshift */
1880 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1881 0, /* bitsize */
1882 FALSE, /* pc_relative */
1883 0, /* bitpos */
1884 complain_overflow_dont, /* complain_on_overflow */
1885 ppc64_elf_unhandled_reloc, /* special_function */
1886 "R_PPC64_JMP_IREL", /* name */
1887 FALSE, /* partial_inplace */
1888 0, /* src_mask */
1889 0, /* dst_mask */
1890 FALSE), /* pcrel_offset */
1891
1892 HOWTO (R_PPC64_IRELATIVE, /* type */
1893 0, /* rightshift */
1894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1895 64, /* bitsize */
1896 FALSE, /* pc_relative */
1897 0, /* bitpos */
1898 complain_overflow_dont, /* complain_on_overflow */
1899 bfd_elf_generic_reloc, /* special_function */
1900 "R_PPC64_IRELATIVE", /* name */
1901 FALSE, /* partial_inplace */
1902 0, /* src_mask */
1903 ONES (64), /* dst_mask */
1904 FALSE), /* pcrel_offset */
1905
1906 /* A 16 bit relative relocation. */
1907 HOWTO (R_PPC64_REL16, /* type */
1908 0, /* rightshift */
1909 1, /* size (0 = byte, 1 = short, 2 = long) */
1910 16, /* bitsize */
1911 TRUE, /* pc_relative */
1912 0, /* bitpos */
1913 complain_overflow_bitfield, /* complain_on_overflow */
1914 bfd_elf_generic_reloc, /* special_function */
1915 "R_PPC64_REL16", /* name */
1916 FALSE, /* partial_inplace */
1917 0, /* src_mask */
1918 0xffff, /* dst_mask */
1919 TRUE), /* pcrel_offset */
1920
1921 /* A 16 bit relative relocation without overflow. */
1922 HOWTO (R_PPC64_REL16_LO, /* type */
1923 0, /* rightshift */
1924 1, /* size (0 = byte, 1 = short, 2 = long) */
1925 16, /* bitsize */
1926 TRUE, /* pc_relative */
1927 0, /* bitpos */
1928 complain_overflow_dont,/* complain_on_overflow */
1929 bfd_elf_generic_reloc, /* special_function */
1930 "R_PPC64_REL16_LO", /* name */
1931 FALSE, /* partial_inplace */
1932 0, /* src_mask */
1933 0xffff, /* dst_mask */
1934 TRUE), /* pcrel_offset */
1935
1936 /* The high order 16 bits of a relative address. */
1937 HOWTO (R_PPC64_REL16_HI, /* type */
1938 16, /* rightshift */
1939 1, /* size (0 = byte, 1 = short, 2 = long) */
1940 16, /* bitsize */
1941 TRUE, /* pc_relative */
1942 0, /* bitpos */
1943 complain_overflow_dont, /* complain_on_overflow */
1944 bfd_elf_generic_reloc, /* special_function */
1945 "R_PPC64_REL16_HI", /* name */
1946 FALSE, /* partial_inplace */
1947 0, /* src_mask */
1948 0xffff, /* dst_mask */
1949 TRUE), /* pcrel_offset */
1950
1951 /* The high order 16 bits of a relative address, plus 1 if the contents of
1952 the low 16 bits, treated as a signed number, is negative. */
1953 HOWTO (R_PPC64_REL16_HA, /* type */
1954 16, /* rightshift */
1955 1, /* size (0 = byte, 1 = short, 2 = long) */
1956 16, /* bitsize */
1957 TRUE, /* pc_relative */
1958 0, /* bitpos */
1959 complain_overflow_dont, /* complain_on_overflow */
1960 ppc64_elf_ha_reloc, /* special_function */
1961 "R_PPC64_REL16_HA", /* name */
1962 FALSE, /* partial_inplace */
1963 0, /* src_mask */
1964 0xffff, /* dst_mask */
1965 TRUE), /* pcrel_offset */
1966
1967 /* GNU extension to record C++ vtable hierarchy. */
1968 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1969 0, /* rightshift */
1970 0, /* size (0 = byte, 1 = short, 2 = long) */
1971 0, /* bitsize */
1972 FALSE, /* pc_relative */
1973 0, /* bitpos */
1974 complain_overflow_dont, /* complain_on_overflow */
1975 NULL, /* special_function */
1976 "R_PPC64_GNU_VTINHERIT", /* name */
1977 FALSE, /* partial_inplace */
1978 0, /* src_mask */
1979 0, /* dst_mask */
1980 FALSE), /* pcrel_offset */
1981
1982 /* GNU extension to record C++ vtable member usage. */
1983 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1984 0, /* rightshift */
1985 0, /* size (0 = byte, 1 = short, 2 = long) */
1986 0, /* bitsize */
1987 FALSE, /* pc_relative */
1988 0, /* bitpos */
1989 complain_overflow_dont, /* complain_on_overflow */
1990 NULL, /* special_function */
1991 "R_PPC64_GNU_VTENTRY", /* name */
1992 FALSE, /* partial_inplace */
1993 0, /* src_mask */
1994 0, /* dst_mask */
1995 FALSE), /* pcrel_offset */
1996 };
1997
1998 \f
1999 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2000 be done. */
2001
2002 static void
2003 ppc_howto_init (void)
2004 {
2005 unsigned int i, type;
2006
2007 for (i = 0;
2008 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2009 i++)
2010 {
2011 type = ppc64_elf_howto_raw[i].type;
2012 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2013 / sizeof (ppc64_elf_howto_table[0])));
2014 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2015 }
2016 }
2017
2018 static reloc_howto_type *
2019 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2020 bfd_reloc_code_real_type code)
2021 {
2022 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2023
2024 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2025 /* Initialize howto table if needed. */
2026 ppc_howto_init ();
2027
2028 switch (code)
2029 {
2030 default:
2031 return NULL;
2032
2033 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2034 break;
2035 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2036 break;
2037 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2038 break;
2039 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2040 break;
2041 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2042 break;
2043 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2044 break;
2045 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2046 break;
2047 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2048 break;
2049 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2050 break;
2051 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2052 break;
2053 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2054 break;
2055 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2056 break;
2057 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2058 break;
2059 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2060 break;
2061 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2062 break;
2063 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2064 break;
2065 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2066 break;
2067 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2068 break;
2069 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2070 break;
2071 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2072 break;
2073 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2074 break;
2075 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2076 break;
2077 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2078 break;
2079 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2080 break;
2081 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2082 break;
2083 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2084 break;
2085 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2086 break;
2087 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2088 break;
2089 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2090 break;
2091 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2092 break;
2093 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2094 break;
2095 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2096 break;
2097 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2098 break;
2099 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2100 break;
2101 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2102 break;
2103 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2104 break;
2105 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2106 break;
2107 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2108 break;
2109 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2110 break;
2111 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2112 break;
2113 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2114 break;
2115 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2116 break;
2117 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2118 break;
2119 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2120 break;
2121 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2122 break;
2123 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2124 break;
2125 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2126 break;
2127 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2128 break;
2129 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2130 break;
2131 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2132 break;
2133 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2134 break;
2135 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2136 break;
2137 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2138 break;
2139 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2140 break;
2141 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2142 break;
2143 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2144 break;
2145 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2146 break;
2147 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2148 break;
2149 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2150 break;
2151 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2152 break;
2153 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2154 break;
2155 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2156 break;
2157 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2158 break;
2159 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2160 break;
2161 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2162 break;
2163 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2164 break;
2165 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2166 break;
2167 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2168 break;
2169 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2170 break;
2171 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2172 break;
2173 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2174 break;
2175 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2176 break;
2177 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2178 break;
2179 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2180 break;
2181 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2182 break;
2183 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2184 break;
2185 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2186 break;
2187 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2188 break;
2189 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2190 break;
2191 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2192 break;
2193 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2194 break;
2195 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2196 break;
2197 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2198 break;
2199 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2200 break;
2201 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2202 break;
2203 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2204 break;
2205 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2206 break;
2207 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2208 break;
2209 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2210 break;
2211 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2212 break;
2213 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2214 break;
2215 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2216 break;
2217 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2218 break;
2219 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2220 break;
2221 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2222 break;
2223 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2224 break;
2225 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2226 break;
2227 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2228 break;
2229 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2230 break;
2231 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2232 break;
2233 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2234 break;
2235 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2236 break;
2237 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2238 break;
2239 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2240 break;
2241 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2242 break;
2243 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2244 break;
2245 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2246 break;
2247 }
2248
2249 return ppc64_elf_howto_table[r];
2250 };
2251
2252 static reloc_howto_type *
2253 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2254 const char *r_name)
2255 {
2256 unsigned int i;
2257
2258 for (i = 0;
2259 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2260 i++)
2261 if (ppc64_elf_howto_raw[i].name != NULL
2262 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2263 return &ppc64_elf_howto_raw[i];
2264
2265 return NULL;
2266 }
2267
2268 /* Set the howto pointer for a PowerPC ELF reloc. */
2269
2270 static void
2271 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2272 Elf_Internal_Rela *dst)
2273 {
2274 unsigned int type;
2275
2276 /* Initialize howto table if needed. */
2277 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2278 ppc_howto_init ();
2279
2280 type = ELF64_R_TYPE (dst->r_info);
2281 if (type >= (sizeof (ppc64_elf_howto_table)
2282 / sizeof (ppc64_elf_howto_table[0])))
2283 {
2284 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2285 abfd, (int) type);
2286 type = R_PPC64_NONE;
2287 }
2288 cache_ptr->howto = ppc64_elf_howto_table[type];
2289 }
2290
2291 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2292
2293 static bfd_reloc_status_type
2294 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2295 void *data, asection *input_section,
2296 bfd *output_bfd, char **error_message)
2297 {
2298 /* If this is a relocatable link (output_bfd test tells us), just
2299 call the generic function. Any adjustment will be done at final
2300 link time. */
2301 if (output_bfd != NULL)
2302 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2303 input_section, output_bfd, error_message);
2304
2305 /* Adjust the addend for sign extension of the low 16 bits.
2306 We won't actually be using the low 16 bits, so trashing them
2307 doesn't matter. */
2308 reloc_entry->addend += 0x8000;
2309 return bfd_reloc_continue;
2310 }
2311
2312 static bfd_reloc_status_type
2313 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2314 void *data, asection *input_section,
2315 bfd *output_bfd, char **error_message)
2316 {
2317 if (output_bfd != NULL)
2318 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2319 input_section, output_bfd, error_message);
2320
2321 if (strcmp (symbol->section->name, ".opd") == 0
2322 && (symbol->section->owner->flags & DYNAMIC) == 0)
2323 {
2324 bfd_vma dest = opd_entry_value (symbol->section,
2325 symbol->value + reloc_entry->addend,
2326 NULL, NULL);
2327 if (dest != (bfd_vma) -1)
2328 reloc_entry->addend = dest - (symbol->value
2329 + symbol->section->output_section->vma
2330 + symbol->section->output_offset);
2331 }
2332 return bfd_reloc_continue;
2333 }
2334
2335 static bfd_reloc_status_type
2336 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2337 void *data, asection *input_section,
2338 bfd *output_bfd, char **error_message)
2339 {
2340 long insn;
2341 enum elf_ppc64_reloc_type r_type;
2342 bfd_size_type octets;
2343 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2344 bfd_boolean is_power4 = FALSE;
2345
2346 /* If this is a relocatable link (output_bfd test tells us), just
2347 call the generic function. Any adjustment will be done at final
2348 link time. */
2349 if (output_bfd != NULL)
2350 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2351 input_section, output_bfd, error_message);
2352
2353 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2354 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2355 insn &= ~(0x01 << 21);
2356 r_type = reloc_entry->howto->type;
2357 if (r_type == R_PPC64_ADDR14_BRTAKEN
2358 || r_type == R_PPC64_REL14_BRTAKEN)
2359 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2360
2361 if (is_power4)
2362 {
2363 /* Set 'a' bit. This is 0b00010 in BO field for branch
2364 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2365 for branch on CTR insns (BO == 1a00t or 1a01t). */
2366 if ((insn & (0x14 << 21)) == (0x04 << 21))
2367 insn |= 0x02 << 21;
2368 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2369 insn |= 0x08 << 21;
2370 else
2371 goto out;
2372 }
2373 else
2374 {
2375 bfd_vma target = 0;
2376 bfd_vma from;
2377
2378 if (!bfd_is_com_section (symbol->section))
2379 target = symbol->value;
2380 target += symbol->section->output_section->vma;
2381 target += symbol->section->output_offset;
2382 target += reloc_entry->addend;
2383
2384 from = (reloc_entry->address
2385 + input_section->output_offset
2386 + input_section->output_section->vma);
2387
2388 /* Invert 'y' bit if not the default. */
2389 if ((bfd_signed_vma) (target - from) < 0)
2390 insn ^= 0x01 << 21;
2391 }
2392 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2393 out:
2394 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2395 input_section, output_bfd, error_message);
2396 }
2397
2398 static bfd_reloc_status_type
2399 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2400 void *data, asection *input_section,
2401 bfd *output_bfd, char **error_message)
2402 {
2403 /* If this is a relocatable link (output_bfd test tells us), just
2404 call the generic function. Any adjustment will be done at final
2405 link time. */
2406 if (output_bfd != NULL)
2407 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2408 input_section, output_bfd, error_message);
2409
2410 /* Subtract the symbol section base address. */
2411 reloc_entry->addend -= symbol->section->output_section->vma;
2412 return bfd_reloc_continue;
2413 }
2414
2415 static bfd_reloc_status_type
2416 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2417 void *data, asection *input_section,
2418 bfd *output_bfd, char **error_message)
2419 {
2420 /* If this is a relocatable link (output_bfd test tells us), just
2421 call the generic function. Any adjustment will be done at final
2422 link time. */
2423 if (output_bfd != NULL)
2424 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2425 input_section, output_bfd, error_message);
2426
2427 /* Subtract the symbol section base address. */
2428 reloc_entry->addend -= symbol->section->output_section->vma;
2429
2430 /* Adjust the addend for sign extension of the low 16 bits. */
2431 reloc_entry->addend += 0x8000;
2432 return bfd_reloc_continue;
2433 }
2434
2435 static bfd_reloc_status_type
2436 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2437 void *data, asection *input_section,
2438 bfd *output_bfd, char **error_message)
2439 {
2440 bfd_vma TOCstart;
2441
2442 /* If this is a relocatable link (output_bfd test tells us), just
2443 call the generic function. Any adjustment will be done at final
2444 link time. */
2445 if (output_bfd != NULL)
2446 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2447 input_section, output_bfd, error_message);
2448
2449 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2450 if (TOCstart == 0)
2451 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2452
2453 /* Subtract the TOC base address. */
2454 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2455 return bfd_reloc_continue;
2456 }
2457
2458 static bfd_reloc_status_type
2459 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2460 void *data, asection *input_section,
2461 bfd *output_bfd, char **error_message)
2462 {
2463 bfd_vma TOCstart;
2464
2465 /* If this is a relocatable link (output_bfd test tells us), just
2466 call the generic function. Any adjustment will be done at final
2467 link time. */
2468 if (output_bfd != NULL)
2469 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2470 input_section, output_bfd, error_message);
2471
2472 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2473 if (TOCstart == 0)
2474 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2475
2476 /* Subtract the TOC base address. */
2477 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2478
2479 /* Adjust the addend for sign extension of the low 16 bits. */
2480 reloc_entry->addend += 0x8000;
2481 return bfd_reloc_continue;
2482 }
2483
2484 static bfd_reloc_status_type
2485 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2486 void *data, asection *input_section,
2487 bfd *output_bfd, char **error_message)
2488 {
2489 bfd_vma TOCstart;
2490 bfd_size_type octets;
2491
2492 /* If this is a relocatable link (output_bfd test tells us), just
2493 call the generic function. Any adjustment will be done at final
2494 link time. */
2495 if (output_bfd != NULL)
2496 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2497 input_section, output_bfd, error_message);
2498
2499 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2500 if (TOCstart == 0)
2501 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2502
2503 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2504 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2505 return bfd_reloc_ok;
2506 }
2507
2508 static bfd_reloc_status_type
2509 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2510 void *data, asection *input_section,
2511 bfd *output_bfd, char **error_message)
2512 {
2513 /* If this is a relocatable link (output_bfd test tells us), just
2514 call the generic function. Any adjustment will be done at final
2515 link time. */
2516 if (output_bfd != NULL)
2517 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2518 input_section, output_bfd, error_message);
2519
2520 if (error_message != NULL)
2521 {
2522 static char buf[60];
2523 sprintf (buf, "generic linker can't handle %s",
2524 reloc_entry->howto->name);
2525 *error_message = buf;
2526 }
2527 return bfd_reloc_dangerous;
2528 }
2529
2530 /* Track GOT entries needed for a given symbol. We might need more
2531 than one got entry per symbol. */
2532 struct got_entry
2533 {
2534 struct got_entry *next;
2535
2536 /* The symbol addend that we'll be placing in the GOT. */
2537 bfd_vma addend;
2538
2539 /* Unlike other ELF targets, we use separate GOT entries for the same
2540 symbol referenced from different input files. This is to support
2541 automatic multiple TOC/GOT sections, where the TOC base can vary
2542 from one input file to another. After partitioning into TOC groups
2543 we merge entries within the group.
2544
2545 Point to the BFD owning this GOT entry. */
2546 bfd *owner;
2547
2548 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2549 TLS_TPREL or TLS_DTPREL for tls entries. */
2550 unsigned char tls_type;
2551
2552 /* Non-zero if got.ent points to real entry. */
2553 unsigned char is_indirect;
2554
2555 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2556 union
2557 {
2558 bfd_signed_vma refcount;
2559 bfd_vma offset;
2560 struct got_entry *ent;
2561 } got;
2562 };
2563
2564 /* The same for PLT. */
2565 struct plt_entry
2566 {
2567 struct plt_entry *next;
2568
2569 bfd_vma addend;
2570
2571 union
2572 {
2573 bfd_signed_vma refcount;
2574 bfd_vma offset;
2575 } plt;
2576 };
2577
2578 struct ppc64_elf_obj_tdata
2579 {
2580 struct elf_obj_tdata elf;
2581
2582 /* Shortcuts to dynamic linker sections. */
2583 asection *got;
2584 asection *relgot;
2585
2586 /* Used during garbage collection. We attach global symbols defined
2587 on removed .opd entries to this section so that the sym is removed. */
2588 asection *deleted_section;
2589
2590 /* TLS local dynamic got entry handling. Support for multiple GOT
2591 sections means we potentially need one of these for each input bfd. */
2592 struct got_entry tlsld_got;
2593
2594 /* A copy of relocs before they are modified for --emit-relocs. */
2595 Elf_Internal_Rela *opd_relocs;
2596
2597 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2598 the reloc to be in the range -32768 to 32767. */
2599 unsigned int has_small_toc_reloc;
2600 };
2601
2602 #define ppc64_elf_tdata(bfd) \
2603 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2604
2605 #define ppc64_tlsld_got(bfd) \
2606 (&ppc64_elf_tdata (bfd)->tlsld_got)
2607
2608 #define is_ppc64_elf(bfd) \
2609 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2610 && elf_object_id (bfd) == PPC64_ELF_DATA)
2611
2612 /* Override the generic function because we store some extras. */
2613
2614 static bfd_boolean
2615 ppc64_elf_mkobject (bfd *abfd)
2616 {
2617 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2618 PPC64_ELF_DATA);
2619 }
2620
2621 /* Fix bad default arch selected for a 64 bit input bfd when the
2622 default is 32 bit. */
2623
2624 static bfd_boolean
2625 ppc64_elf_object_p (bfd *abfd)
2626 {
2627 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2628 {
2629 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2630
2631 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2632 {
2633 /* Relies on arch after 32 bit default being 64 bit default. */
2634 abfd->arch_info = abfd->arch_info->next;
2635 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2636 }
2637 }
2638 return TRUE;
2639 }
2640
2641 /* Support for core dump NOTE sections. */
2642
2643 static bfd_boolean
2644 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2645 {
2646 size_t offset, size;
2647
2648 if (note->descsz != 504)
2649 return FALSE;
2650
2651 /* pr_cursig */
2652 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2653
2654 /* pr_pid */
2655 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2656
2657 /* pr_reg */
2658 offset = 112;
2659 size = 384;
2660
2661 /* Make a ".reg/999" section. */
2662 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2663 size, note->descpos + offset);
2664 }
2665
2666 static bfd_boolean
2667 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2668 {
2669 if (note->descsz != 136)
2670 return FALSE;
2671
2672 elf_tdata (abfd)->core_program
2673 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2674 elf_tdata (abfd)->core_command
2675 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2676
2677 return TRUE;
2678 }
2679
2680 static char *
2681 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2682 ...)
2683 {
2684 switch (note_type)
2685 {
2686 default:
2687 return NULL;
2688
2689 case NT_PRPSINFO:
2690 {
2691 char data[136];
2692 va_list ap;
2693
2694 va_start (ap, note_type);
2695 memset (data, 0, 40);
2696 strncpy (data + 40, va_arg (ap, const char *), 16);
2697 strncpy (data + 56, va_arg (ap, const char *), 80);
2698 va_end (ap);
2699 return elfcore_write_note (abfd, buf, bufsiz,
2700 "CORE", note_type, data, sizeof (data));
2701 }
2702
2703 case NT_PRSTATUS:
2704 {
2705 char data[504];
2706 va_list ap;
2707 long pid;
2708 int cursig;
2709 const void *greg;
2710
2711 va_start (ap, note_type);
2712 memset (data, 0, 112);
2713 pid = va_arg (ap, long);
2714 bfd_put_32 (abfd, pid, data + 32);
2715 cursig = va_arg (ap, int);
2716 bfd_put_16 (abfd, cursig, data + 12);
2717 greg = va_arg (ap, const void *);
2718 memcpy (data + 112, greg, 384);
2719 memset (data + 496, 0, 8);
2720 va_end (ap);
2721 return elfcore_write_note (abfd, buf, bufsiz,
2722 "CORE", note_type, data, sizeof (data));
2723 }
2724 }
2725 }
2726
2727 /* Merge backend specific data from an object file to the output
2728 object file when linking. */
2729
2730 static bfd_boolean
2731 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2732 {
2733 /* Check if we have the same endianess. */
2734 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2735 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2736 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2737 {
2738 const char *msg;
2739
2740 if (bfd_big_endian (ibfd))
2741 msg = _("%B: compiled for a big endian system "
2742 "and target is little endian");
2743 else
2744 msg = _("%B: compiled for a little endian system "
2745 "and target is big endian");
2746
2747 (*_bfd_error_handler) (msg, ibfd);
2748
2749 bfd_set_error (bfd_error_wrong_format);
2750 return FALSE;
2751 }
2752
2753 return TRUE;
2754 }
2755
2756 /* Add extra PPC sections. */
2757
2758 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2759 {
2760 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2761 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2762 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2766 { NULL, 0, 0, 0, 0 }
2767 };
2768
2769 enum _ppc64_sec_type {
2770 sec_normal = 0,
2771 sec_opd = 1,
2772 sec_toc = 2
2773 };
2774
2775 struct _ppc64_elf_section_data
2776 {
2777 struct bfd_elf_section_data elf;
2778
2779 union
2780 {
2781 /* An array with one entry for each opd function descriptor. */
2782 struct _opd_sec_data
2783 {
2784 /* Points to the function code section for local opd entries. */
2785 asection **func_sec;
2786
2787 /* After editing .opd, adjust references to opd local syms. */
2788 long *adjust;
2789 } opd;
2790
2791 /* An array for toc sections, indexed by offset/8. */
2792 struct _toc_sec_data
2793 {
2794 /* Specifies the relocation symbol index used at a given toc offset. */
2795 unsigned *symndx;
2796
2797 /* And the relocation addend. */
2798 bfd_vma *add;
2799 } toc;
2800 } u;
2801
2802 enum _ppc64_sec_type sec_type:2;
2803
2804 /* Flag set when small branches are detected. Used to
2805 select suitable defaults for the stub group size. */
2806 unsigned int has_14bit_branch:1;
2807 };
2808
2809 #define ppc64_elf_section_data(sec) \
2810 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2811
2812 static bfd_boolean
2813 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2814 {
2815 if (!sec->used_by_bfd)
2816 {
2817 struct _ppc64_elf_section_data *sdata;
2818 bfd_size_type amt = sizeof (*sdata);
2819
2820 sdata = bfd_zalloc (abfd, amt);
2821 if (sdata == NULL)
2822 return FALSE;
2823 sec->used_by_bfd = sdata;
2824 }
2825
2826 return _bfd_elf_new_section_hook (abfd, sec);
2827 }
2828
2829 static struct _opd_sec_data *
2830 get_opd_info (asection * sec)
2831 {
2832 if (sec != NULL
2833 && ppc64_elf_section_data (sec) != NULL
2834 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2835 return &ppc64_elf_section_data (sec)->u.opd;
2836 return NULL;
2837 }
2838 \f
2839 /* Parameters for the qsort hook. */
2840 static bfd_boolean synthetic_relocatable;
2841
2842 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2843
2844 static int
2845 compare_symbols (const void *ap, const void *bp)
2846 {
2847 const asymbol *a = * (const asymbol **) ap;
2848 const asymbol *b = * (const asymbol **) bp;
2849
2850 /* Section symbols first. */
2851 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2852 return -1;
2853 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2854 return 1;
2855
2856 /* then .opd symbols. */
2857 if (strcmp (a->section->name, ".opd") == 0
2858 && strcmp (b->section->name, ".opd") != 0)
2859 return -1;
2860 if (strcmp (a->section->name, ".opd") != 0
2861 && strcmp (b->section->name, ".opd") == 0)
2862 return 1;
2863
2864 /* then other code symbols. */
2865 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2866 == (SEC_CODE | SEC_ALLOC)
2867 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2868 != (SEC_CODE | SEC_ALLOC))
2869 return -1;
2870
2871 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2872 != (SEC_CODE | SEC_ALLOC)
2873 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2874 == (SEC_CODE | SEC_ALLOC))
2875 return 1;
2876
2877 if (synthetic_relocatable)
2878 {
2879 if (a->section->id < b->section->id)
2880 return -1;
2881
2882 if (a->section->id > b->section->id)
2883 return 1;
2884 }
2885
2886 if (a->value + a->section->vma < b->value + b->section->vma)
2887 return -1;
2888
2889 if (a->value + a->section->vma > b->value + b->section->vma)
2890 return 1;
2891
2892 /* For syms with the same value, prefer strong dynamic global function
2893 syms over other syms. */
2894 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2895 return -1;
2896
2897 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2898 return 1;
2899
2900 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2901 return -1;
2902
2903 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2904 return 1;
2905
2906 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2907 return -1;
2908
2909 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2910 return 1;
2911
2912 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2913 return -1;
2914
2915 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2916 return 1;
2917
2918 return 0;
2919 }
2920
2921 /* Search SYMS for a symbol of the given VALUE. */
2922
2923 static asymbol *
2924 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2925 {
2926 long mid;
2927
2928 if (id == -1)
2929 {
2930 while (lo < hi)
2931 {
2932 mid = (lo + hi) >> 1;
2933 if (syms[mid]->value + syms[mid]->section->vma < value)
2934 lo = mid + 1;
2935 else if (syms[mid]->value + syms[mid]->section->vma > value)
2936 hi = mid;
2937 else
2938 return syms[mid];
2939 }
2940 }
2941 else
2942 {
2943 while (lo < hi)
2944 {
2945 mid = (lo + hi) >> 1;
2946 if (syms[mid]->section->id < id)
2947 lo = mid + 1;
2948 else if (syms[mid]->section->id > id)
2949 hi = mid;
2950 else if (syms[mid]->value < value)
2951 lo = mid + 1;
2952 else if (syms[mid]->value > value)
2953 hi = mid;
2954 else
2955 return syms[mid];
2956 }
2957 }
2958 return NULL;
2959 }
2960
2961 static bfd_boolean
2962 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2963 {
2964 bfd_vma vma = *(bfd_vma *) ptr;
2965 return ((section->flags & SEC_ALLOC) != 0
2966 && section->vma <= vma
2967 && vma < section->vma + section->size);
2968 }
2969
2970 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2971 entry syms. Also generate @plt symbols for the glink branch table. */
2972
2973 static long
2974 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2975 long static_count, asymbol **static_syms,
2976 long dyn_count, asymbol **dyn_syms,
2977 asymbol **ret)
2978 {
2979 asymbol *s;
2980 long i;
2981 long count;
2982 char *names;
2983 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2984 asection *opd;
2985 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2986 asymbol **syms;
2987
2988 *ret = NULL;
2989
2990 opd = bfd_get_section_by_name (abfd, ".opd");
2991 if (opd == NULL)
2992 return 0;
2993
2994 symcount = static_count;
2995 if (!relocatable)
2996 symcount += dyn_count;
2997 if (symcount == 0)
2998 return 0;
2999
3000 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3001 if (syms == NULL)
3002 return -1;
3003
3004 if (!relocatable && static_count != 0 && dyn_count != 0)
3005 {
3006 /* Use both symbol tables. */
3007 memcpy (syms, static_syms, static_count * sizeof (*syms));
3008 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3009 }
3010 else if (!relocatable && static_count == 0)
3011 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3012 else
3013 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3014
3015 synthetic_relocatable = relocatable;
3016 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3017
3018 if (!relocatable && symcount > 1)
3019 {
3020 long j;
3021 /* Trim duplicate syms, since we may have merged the normal and
3022 dynamic symbols. Actually, we only care about syms that have
3023 different values, so trim any with the same value. */
3024 for (i = 1, j = 1; i < symcount; ++i)
3025 if (syms[i - 1]->value + syms[i - 1]->section->vma
3026 != syms[i]->value + syms[i]->section->vma)
3027 syms[j++] = syms[i];
3028 symcount = j;
3029 }
3030
3031 i = 0;
3032 if (strcmp (syms[i]->section->name, ".opd") == 0)
3033 ++i;
3034 codesecsym = i;
3035
3036 for (; i < symcount; ++i)
3037 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3038 != (SEC_CODE | SEC_ALLOC))
3039 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3040 break;
3041 codesecsymend = i;
3042
3043 for (; i < symcount; ++i)
3044 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3045 break;
3046 secsymend = i;
3047
3048 for (; i < symcount; ++i)
3049 if (strcmp (syms[i]->section->name, ".opd") != 0)
3050 break;
3051 opdsymend = i;
3052
3053 for (; i < symcount; ++i)
3054 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3055 != (SEC_CODE | SEC_ALLOC))
3056 break;
3057 symcount = i;
3058
3059 count = 0;
3060
3061 if (relocatable)
3062 {
3063 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3064 arelent *r;
3065 size_t size;
3066 long relcount;
3067
3068 if (opdsymend == secsymend)
3069 goto done;
3070
3071 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3072 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3073 if (relcount == 0)
3074 goto done;
3075
3076 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3077 {
3078 count = -1;
3079 goto done;
3080 }
3081
3082 size = 0;
3083 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3084 {
3085 asymbol *sym;
3086
3087 while (r < opd->relocation + relcount
3088 && r->address < syms[i]->value + opd->vma)
3089 ++r;
3090
3091 if (r == opd->relocation + relcount)
3092 break;
3093
3094 if (r->address != syms[i]->value + opd->vma)
3095 continue;
3096
3097 if (r->howto->type != R_PPC64_ADDR64)
3098 continue;
3099
3100 sym = *r->sym_ptr_ptr;
3101 if (!sym_exists_at (syms, opdsymend, symcount,
3102 sym->section->id, sym->value + r->addend))
3103 {
3104 ++count;
3105 size += sizeof (asymbol);
3106 size += strlen (syms[i]->name) + 2;
3107 }
3108 }
3109
3110 s = *ret = bfd_malloc (size);
3111 if (s == NULL)
3112 {
3113 count = -1;
3114 goto done;
3115 }
3116
3117 names = (char *) (s + count);
3118
3119 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3120 {
3121 asymbol *sym;
3122
3123 while (r < opd->relocation + relcount
3124 && r->address < syms[i]->value + opd->vma)
3125 ++r;
3126
3127 if (r == opd->relocation + relcount)
3128 break;
3129
3130 if (r->address != syms[i]->value + opd->vma)
3131 continue;
3132
3133 if (r->howto->type != R_PPC64_ADDR64)
3134 continue;
3135
3136 sym = *r->sym_ptr_ptr;
3137 if (!sym_exists_at (syms, opdsymend, symcount,
3138 sym->section->id, sym->value + r->addend))
3139 {
3140 size_t len;
3141
3142 *s = *syms[i];
3143 s->flags |= BSF_SYNTHETIC;
3144 s->section = sym->section;
3145 s->value = sym->value + r->addend;
3146 s->name = names;
3147 *names++ = '.';
3148 len = strlen (syms[i]->name);
3149 memcpy (names, syms[i]->name, len + 1);
3150 names += len + 1;
3151 /* Have udata.p point back to the original symbol this
3152 synthetic symbol was derived from. */
3153 s->udata.p = syms[i];
3154 s++;
3155 }
3156 }
3157 }
3158 else
3159 {
3160 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3161 bfd_byte *contents;
3162 size_t size;
3163 long plt_count = 0;
3164 bfd_vma glink_vma = 0, resolv_vma = 0;
3165 asection *dynamic, *glink = NULL, *relplt = NULL;
3166 arelent *p;
3167
3168 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3169 {
3170 if (contents)
3171 {
3172 free_contents_and_exit:
3173 free (contents);
3174 }
3175 count = -1;
3176 goto done;
3177 }
3178
3179 size = 0;
3180 for (i = secsymend; i < opdsymend; ++i)
3181 {
3182 bfd_vma ent;
3183
3184 /* Ignore bogus symbols. */
3185 if (syms[i]->value > opd->size - 8)
3186 continue;
3187
3188 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3189 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3190 {
3191 ++count;
3192 size += sizeof (asymbol);
3193 size += strlen (syms[i]->name) + 2;
3194 }
3195 }
3196
3197 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3198 if (dyn_count != 0
3199 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3200 {
3201 bfd_byte *dynbuf, *extdyn, *extdynend;
3202 size_t extdynsize;
3203 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3204
3205 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3206 goto free_contents_and_exit;
3207
3208 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3209 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3210
3211 extdyn = dynbuf;
3212 extdynend = extdyn + dynamic->size;
3213 for (; extdyn < extdynend; extdyn += extdynsize)
3214 {
3215 Elf_Internal_Dyn dyn;
3216 (*swap_dyn_in) (abfd, extdyn, &dyn);
3217
3218 if (dyn.d_tag == DT_NULL)
3219 break;
3220
3221 if (dyn.d_tag == DT_PPC64_GLINK)
3222 {
3223 /* The first glink stub starts at offset 32; see comment in
3224 ppc64_elf_finish_dynamic_sections. */
3225 glink_vma = dyn.d_un.d_val + 32;
3226 /* The .glink section usually does not survive the final
3227 link; search for the section (usually .text) where the
3228 glink stubs now reside. */
3229 glink = bfd_sections_find_if (abfd, section_covers_vma,
3230 &glink_vma);
3231 break;
3232 }
3233 }
3234
3235 free (dynbuf);
3236 }
3237
3238 if (glink != NULL)
3239 {
3240 /* Determine __glink trampoline by reading the relative branch
3241 from the first glink stub. */
3242 bfd_byte buf[4];
3243 if (bfd_get_section_contents (abfd, glink, buf,
3244 glink_vma + 4 - glink->vma, 4))
3245 {
3246 unsigned int insn = bfd_get_32 (abfd, buf);
3247 insn ^= B_DOT;
3248 if ((insn & ~0x3fffffc) == 0)
3249 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3250 }
3251
3252 if (resolv_vma)
3253 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3254
3255 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3256 if (relplt != NULL)
3257 {
3258 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3259 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3260 goto free_contents_and_exit;
3261
3262 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3263 size += plt_count * sizeof (asymbol);
3264
3265 p = relplt->relocation;
3266 for (i = 0; i < plt_count; i++, p++)
3267 {
3268 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3269 if (p->addend != 0)
3270 size += sizeof ("+0x") - 1 + 16;
3271 }
3272 }
3273 }
3274
3275 s = *ret = bfd_malloc (size);
3276 if (s == NULL)
3277 goto free_contents_and_exit;
3278
3279 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3280
3281 for (i = secsymend; i < opdsymend; ++i)
3282 {
3283 bfd_vma ent;
3284
3285 if (syms[i]->value > opd->size - 8)
3286 continue;
3287
3288 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3289 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3290 {
3291 long lo, hi;
3292 size_t len;
3293 asection *sec = abfd->sections;
3294
3295 *s = *syms[i];
3296 lo = codesecsym;
3297 hi = codesecsymend;
3298 while (lo < hi)
3299 {
3300 long mid = (lo + hi) >> 1;
3301 if (syms[mid]->section->vma < ent)
3302 lo = mid + 1;
3303 else if (syms[mid]->section->vma > ent)
3304 hi = mid;
3305 else
3306 {
3307 sec = syms[mid]->section;
3308 break;
3309 }
3310 }
3311
3312 if (lo >= hi && lo > codesecsym)
3313 sec = syms[lo - 1]->section;
3314
3315 for (; sec != NULL; sec = sec->next)
3316 {
3317 if (sec->vma > ent)
3318 break;
3319 if ((sec->flags & SEC_ALLOC) == 0
3320 || (sec->flags & SEC_LOAD) == 0)
3321 break;
3322 if ((sec->flags & SEC_CODE) != 0)
3323 s->section = sec;
3324 }
3325 s->flags |= BSF_SYNTHETIC;
3326 s->value = ent - s->section->vma;
3327 s->name = names;
3328 *names++ = '.';
3329 len = strlen (syms[i]->name);
3330 memcpy (names, syms[i]->name, len + 1);
3331 names += len + 1;
3332 /* Have udata.p point back to the original symbol this
3333 synthetic symbol was derived from. */
3334 s->udata.p = syms[i];
3335 s++;
3336 }
3337 }
3338 free (contents);
3339
3340 if (glink != NULL && relplt != NULL)
3341 {
3342 if (resolv_vma)
3343 {
3344 /* Add a symbol for the main glink trampoline. */
3345 memset (s, 0, sizeof *s);
3346 s->the_bfd = abfd;
3347 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3348 s->section = glink;
3349 s->value = resolv_vma - glink->vma;
3350 s->name = names;
3351 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3352 names += sizeof ("__glink_PLTresolve");
3353 s++;
3354 count++;
3355 }
3356
3357 /* FIXME: It would be very much nicer to put sym@plt on the
3358 stub rather than on the glink branch table entry. The
3359 objdump disassembler would then use a sensible symbol
3360 name on plt calls. The difficulty in doing so is
3361 a) finding the stubs, and,
3362 b) matching stubs against plt entries, and,
3363 c) there can be multiple stubs for a given plt entry.
3364
3365 Solving (a) could be done by code scanning, but older
3366 ppc64 binaries used different stubs to current code.
3367 (b) is the tricky one since you need to known the toc
3368 pointer for at least one function that uses a pic stub to
3369 be able to calculate the plt address referenced.
3370 (c) means gdb would need to set multiple breakpoints (or
3371 find the glink branch itself) when setting breakpoints
3372 for pending shared library loads. */
3373 p = relplt->relocation;
3374 for (i = 0; i < plt_count; i++, p++)
3375 {
3376 size_t len;
3377
3378 *s = **p->sym_ptr_ptr;
3379 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3380 we are defining a symbol, ensure one of them is set. */
3381 if ((s->flags & BSF_LOCAL) == 0)
3382 s->flags |= BSF_GLOBAL;
3383 s->flags |= BSF_SYNTHETIC;
3384 s->section = glink;
3385 s->value = glink_vma - glink->vma;
3386 s->name = names;
3387 s->udata.p = NULL;
3388 len = strlen ((*p->sym_ptr_ptr)->name);
3389 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3390 names += len;
3391 if (p->addend != 0)
3392 {
3393 memcpy (names, "+0x", sizeof ("+0x") - 1);
3394 names += sizeof ("+0x") - 1;
3395 bfd_sprintf_vma (abfd, names, p->addend);
3396 names += strlen (names);
3397 }
3398 memcpy (names, "@plt", sizeof ("@plt"));
3399 names += sizeof ("@plt");
3400 s++;
3401 glink_vma += 8;
3402 if (i >= 0x8000)
3403 glink_vma += 4;
3404 }
3405 count += plt_count;
3406 }
3407 }
3408
3409 done:
3410 free (syms);
3411 return count;
3412 }
3413 \f
3414 /* The following functions are specific to the ELF linker, while
3415 functions above are used generally. Those named ppc64_elf_* are
3416 called by the main ELF linker code. They appear in this file more
3417 or less in the order in which they are called. eg.
3418 ppc64_elf_check_relocs is called early in the link process,
3419 ppc64_elf_finish_dynamic_sections is one of the last functions
3420 called.
3421
3422 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3423 functions have both a function code symbol and a function descriptor
3424 symbol. A call to foo in a relocatable object file looks like:
3425
3426 . .text
3427 . x:
3428 . bl .foo
3429 . nop
3430
3431 The function definition in another object file might be:
3432
3433 . .section .opd
3434 . foo: .quad .foo
3435 . .quad .TOC.@tocbase
3436 . .quad 0
3437 .
3438 . .text
3439 . .foo: blr
3440
3441 When the linker resolves the call during a static link, the branch
3442 unsurprisingly just goes to .foo and the .opd information is unused.
3443 If the function definition is in a shared library, things are a little
3444 different: The call goes via a plt call stub, the opd information gets
3445 copied to the plt, and the linker patches the nop.
3446
3447 . x:
3448 . bl .foo_stub
3449 . ld 2,40(1)
3450 .
3451 .
3452 . .foo_stub:
3453 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3454 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3455 . std 2,40(1) # this is the general idea
3456 . ld 11,0(12)
3457 . ld 2,8(12)
3458 . mtctr 11
3459 . ld 11,16(12)
3460 . bctr
3461 .
3462 . .section .plt
3463 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3464
3465 The "reloc ()" notation is supposed to indicate that the linker emits
3466 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3467 copying.
3468
3469 What are the difficulties here? Well, firstly, the relocations
3470 examined by the linker in check_relocs are against the function code
3471 sym .foo, while the dynamic relocation in the plt is emitted against
3472 the function descriptor symbol, foo. Somewhere along the line, we need
3473 to carefully copy dynamic link information from one symbol to the other.
3474 Secondly, the generic part of the elf linker will make .foo a dynamic
3475 symbol as is normal for most other backends. We need foo dynamic
3476 instead, at least for an application final link. However, when
3477 creating a shared library containing foo, we need to have both symbols
3478 dynamic so that references to .foo are satisfied during the early
3479 stages of linking. Otherwise the linker might decide to pull in a
3480 definition from some other object, eg. a static library.
3481
3482 Update: As of August 2004, we support a new convention. Function
3483 calls may use the function descriptor symbol, ie. "bl foo". This
3484 behaves exactly as "bl .foo". */
3485
3486 /* The linker needs to keep track of the number of relocs that it
3487 decides to copy as dynamic relocs in check_relocs for each symbol.
3488 This is so that it can later discard them if they are found to be
3489 unnecessary. We store the information in a field extending the
3490 regular ELF linker hash table. */
3491
3492 struct ppc_dyn_relocs
3493 {
3494 struct ppc_dyn_relocs *next;
3495
3496 /* The input section of the reloc. */
3497 asection *sec;
3498
3499 /* Total number of relocs copied for the input section. */
3500 bfd_size_type count;
3501
3502 /* Number of pc-relative relocs copied for the input section. */
3503 bfd_size_type pc_count;
3504 };
3505
3506 /* Of those relocs that might be copied as dynamic relocs, this function
3507 selects those that must be copied when linking a shared library,
3508 even when the symbol is local. */
3509
3510 static int
3511 must_be_dyn_reloc (struct bfd_link_info *info,
3512 enum elf_ppc64_reloc_type r_type)
3513 {
3514 switch (r_type)
3515 {
3516 default:
3517 return 1;
3518
3519 case R_PPC64_REL32:
3520 case R_PPC64_REL64:
3521 case R_PPC64_REL30:
3522 return 0;
3523
3524 case R_PPC64_TPREL16:
3525 case R_PPC64_TPREL16_LO:
3526 case R_PPC64_TPREL16_HI:
3527 case R_PPC64_TPREL16_HA:
3528 case R_PPC64_TPREL16_DS:
3529 case R_PPC64_TPREL16_LO_DS:
3530 case R_PPC64_TPREL16_HIGHER:
3531 case R_PPC64_TPREL16_HIGHERA:
3532 case R_PPC64_TPREL16_HIGHEST:
3533 case R_PPC64_TPREL16_HIGHESTA:
3534 case R_PPC64_TPREL64:
3535 return !info->executable;
3536 }
3537 }
3538
3539 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3540 copying dynamic variables from a shared lib into an app's dynbss
3541 section, and instead use a dynamic relocation to point into the
3542 shared lib. With code that gcc generates, it's vital that this be
3543 enabled; In the PowerPC64 ABI, the address of a function is actually
3544 the address of a function descriptor, which resides in the .opd
3545 section. gcc uses the descriptor directly rather than going via the
3546 GOT as some other ABI's do, which means that initialized function
3547 pointers must reference the descriptor. Thus, a function pointer
3548 initialized to the address of a function in a shared library will
3549 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3550 redefines the function descriptor symbol to point to the copy. This
3551 presents a problem as a plt entry for that function is also
3552 initialized from the function descriptor symbol and the copy reloc
3553 may not be initialized first. */
3554 #define ELIMINATE_COPY_RELOCS 1
3555
3556 /* Section name for stubs is the associated section name plus this
3557 string. */
3558 #define STUB_SUFFIX ".stub"
3559
3560 /* Linker stubs.
3561 ppc_stub_long_branch:
3562 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3563 destination, but a 24 bit branch in a stub section will reach.
3564 . b dest
3565
3566 ppc_stub_plt_branch:
3567 Similar to the above, but a 24 bit branch in the stub section won't
3568 reach its destination.
3569 . addis %r12,%r2,xxx@toc@ha
3570 . ld %r11,xxx@toc@l(%r12)
3571 . mtctr %r11
3572 . bctr
3573
3574 ppc_stub_plt_call:
3575 Used to call a function in a shared library. If it so happens that
3576 the plt entry referenced crosses a 64k boundary, then an extra
3577 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3578 . addis %r12,%r2,xxx@toc@ha
3579 . std %r2,40(%r1)
3580 . ld %r11,xxx+0@toc@l(%r12)
3581 . mtctr %r11
3582 . ld %r2,xxx+8@toc@l(%r12)
3583 . ld %r11,xxx+16@toc@l(%r12)
3584 . bctr
3585
3586 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3587 code to adjust the value and save r2 to support multiple toc sections.
3588 A ppc_stub_long_branch with an r2 offset looks like:
3589 . std %r2,40(%r1)
3590 . addis %r2,%r2,off@ha
3591 . addi %r2,%r2,off@l
3592 . b dest
3593
3594 A ppc_stub_plt_branch with an r2 offset looks like:
3595 . std %r2,40(%r1)
3596 . addis %r12,%r2,xxx@toc@ha
3597 . ld %r11,xxx@toc@l(%r12)
3598 . addis %r2,%r2,off@ha
3599 . addi %r2,%r2,off@l
3600 . mtctr %r11
3601 . bctr
3602
3603 In cases where the "addis" instruction would add zero, the "addis" is
3604 omitted and following instructions modified slightly in some cases.
3605 */
3606
3607 enum ppc_stub_type {
3608 ppc_stub_none,
3609 ppc_stub_long_branch,
3610 ppc_stub_long_branch_r2off,
3611 ppc_stub_plt_branch,
3612 ppc_stub_plt_branch_r2off,
3613 ppc_stub_plt_call
3614 };
3615
3616 struct ppc_stub_hash_entry {
3617
3618 /* Base hash table entry structure. */
3619 struct bfd_hash_entry root;
3620
3621 enum ppc_stub_type stub_type;
3622
3623 /* The stub section. */
3624 asection *stub_sec;
3625
3626 /* Offset within stub_sec of the beginning of this stub. */
3627 bfd_vma stub_offset;
3628
3629 /* Given the symbol's value and its section we can determine its final
3630 value when building the stubs (so the stub knows where to jump. */
3631 bfd_vma target_value;
3632 asection *target_section;
3633
3634 /* The symbol table entry, if any, that this was derived from. */
3635 struct ppc_link_hash_entry *h;
3636 struct plt_entry *plt_ent;
3637
3638 /* And the reloc addend that this was derived from. */
3639 bfd_vma addend;
3640
3641 /* Where this stub is being called from, or, in the case of combined
3642 stub sections, the first input section in the group. */
3643 asection *id_sec;
3644 };
3645
3646 struct ppc_branch_hash_entry {
3647
3648 /* Base hash table entry structure. */
3649 struct bfd_hash_entry root;
3650
3651 /* Offset within branch lookup table. */
3652 unsigned int offset;
3653
3654 /* Generation marker. */
3655 unsigned int iter;
3656 };
3657
3658 struct ppc_link_hash_entry
3659 {
3660 struct elf_link_hash_entry elf;
3661
3662 union {
3663 /* A pointer to the most recently used stub hash entry against this
3664 symbol. */
3665 struct ppc_stub_hash_entry *stub_cache;
3666
3667 /* A pointer to the next symbol starting with a '.' */
3668 struct ppc_link_hash_entry *next_dot_sym;
3669 } u;
3670
3671 /* Track dynamic relocs copied for this symbol. */
3672 struct ppc_dyn_relocs *dyn_relocs;
3673
3674 /* Link between function code and descriptor symbols. */
3675 struct ppc_link_hash_entry *oh;
3676
3677 /* Flag function code and descriptor symbols. */
3678 unsigned int is_func:1;
3679 unsigned int is_func_descriptor:1;
3680 unsigned int fake:1;
3681
3682 /* Whether global opd/toc sym has been adjusted or not.
3683 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3684 should be set for all globals defined in any opd/toc section. */
3685 unsigned int adjust_done:1;
3686
3687 /* Set if we twiddled this symbol to weak at some stage. */
3688 unsigned int was_undefined:1;
3689
3690 /* Contexts in which symbol is used in the GOT (or TOC).
3691 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3692 corresponding relocs are encountered during check_relocs.
3693 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3694 indicate the corresponding GOT entry type is not needed.
3695 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3696 a TPREL one. We use a separate flag rather than setting TPREL
3697 just for convenience in distinguishing the two cases. */
3698 #define TLS_GD 1 /* GD reloc. */
3699 #define TLS_LD 2 /* LD reloc. */
3700 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3701 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3702 #define TLS_TLS 16 /* Any TLS reloc. */
3703 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3704 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3705 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3706 unsigned char tls_mask;
3707 };
3708
3709 /* ppc64 ELF linker hash table. */
3710
3711 struct ppc_link_hash_table
3712 {
3713 struct elf_link_hash_table elf;
3714
3715 /* The stub hash table. */
3716 struct bfd_hash_table stub_hash_table;
3717
3718 /* Another hash table for plt_branch stubs. */
3719 struct bfd_hash_table branch_hash_table;
3720
3721 /* Linker stub bfd. */
3722 bfd *stub_bfd;
3723
3724 /* Linker call-backs. */
3725 asection * (*add_stub_section) (const char *, asection *);
3726 void (*layout_sections_again) (void);
3727
3728 /* Array to keep track of which stub sections have been created, and
3729 information on stub grouping. */
3730 struct map_stub {
3731 /* This is the section to which stubs in the group will be attached. */
3732 asection *link_sec;
3733 /* The stub section. */
3734 asection *stub_sec;
3735 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3736 bfd_vma toc_off;
3737 } *stub_group;
3738
3739 /* Temp used when calculating TOC pointers. */
3740 bfd_vma toc_curr;
3741 bfd *toc_bfd;
3742 asection *toc_first_sec;
3743
3744 /* Highest input section id. */
3745 int top_id;
3746
3747 /* Highest output section index. */
3748 int top_index;
3749
3750 /* Used when adding symbols. */
3751 struct ppc_link_hash_entry *dot_syms;
3752
3753 /* List of input sections for each output section. */
3754 asection **input_list;
3755
3756 /* Short-cuts to get to dynamic linker sections. */
3757 asection *got;
3758 asection *plt;
3759 asection *relplt;
3760 asection *iplt;
3761 asection *reliplt;
3762 asection *dynbss;
3763 asection *relbss;
3764 asection *glink;
3765 asection *sfpr;
3766 asection *brlt;
3767 asection *relbrlt;
3768
3769 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3770 struct ppc_link_hash_entry *tls_get_addr;
3771 struct ppc_link_hash_entry *tls_get_addr_fd;
3772
3773 /* The size of reliplt used by got entry relocs. */
3774 bfd_size_type got_reli_size;
3775
3776 /* Statistics. */
3777 unsigned long stub_count[ppc_stub_plt_call];
3778
3779 /* Number of stubs against global syms. */
3780 unsigned long stub_globals;
3781
3782 /* Set if we should emit symbols for stubs. */
3783 unsigned int emit_stub_syms:1;
3784
3785 /* Set if __tls_get_addr optimization should not be done. */
3786 unsigned int no_tls_get_addr_opt:1;
3787
3788 /* Support for multiple toc sections. */
3789 unsigned int do_multi_toc:1;
3790 unsigned int multi_toc_needed:1;
3791 unsigned int second_toc_pass:1;
3792 unsigned int do_toc_opt:1;
3793
3794 /* Set on error. */
3795 unsigned int stub_error:1;
3796
3797 /* Temp used by ppc64_elf_process_dot_syms. */
3798 unsigned int twiddled_syms:1;
3799
3800 /* Incremented every time we size stubs. */
3801 unsigned int stub_iteration;
3802
3803 /* Small local sym cache. */
3804 struct sym_cache sym_cache;
3805 };
3806
3807 /* Rename some of the generic section flags to better document how they
3808 are used here. */
3809
3810 /* Nonzero if this section has TLS related relocations. */
3811 #define has_tls_reloc sec_flg0
3812
3813 /* Nonzero if this section has a call to __tls_get_addr. */
3814 #define has_tls_get_addr_call sec_flg1
3815
3816 /* Nonzero if this section has any toc or got relocs. */
3817 #define has_toc_reloc sec_flg2
3818
3819 /* Nonzero if this section has a call to another section that uses
3820 the toc or got. */
3821 #define makes_toc_func_call sec_flg3
3822
3823 /* Recursion protection when determining above flag. */
3824 #define call_check_in_progress sec_flg4
3825 #define call_check_done sec_flg5
3826
3827 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3828
3829 #define ppc_hash_table(p) \
3830 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3831 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3832
3833 #define ppc_stub_hash_lookup(table, string, create, copy) \
3834 ((struct ppc_stub_hash_entry *) \
3835 bfd_hash_lookup ((table), (string), (create), (copy)))
3836
3837 #define ppc_branch_hash_lookup(table, string, create, copy) \
3838 ((struct ppc_branch_hash_entry *) \
3839 bfd_hash_lookup ((table), (string), (create), (copy)))
3840
3841 /* Create an entry in the stub hash table. */
3842
3843 static struct bfd_hash_entry *
3844 stub_hash_newfunc (struct bfd_hash_entry *entry,
3845 struct bfd_hash_table *table,
3846 const char *string)
3847 {
3848 /* Allocate the structure if it has not already been allocated by a
3849 subclass. */
3850 if (entry == NULL)
3851 {
3852 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3853 if (entry == NULL)
3854 return entry;
3855 }
3856
3857 /* Call the allocation method of the superclass. */
3858 entry = bfd_hash_newfunc (entry, table, string);
3859 if (entry != NULL)
3860 {
3861 struct ppc_stub_hash_entry *eh;
3862
3863 /* Initialize the local fields. */
3864 eh = (struct ppc_stub_hash_entry *) entry;
3865 eh->stub_type = ppc_stub_none;
3866 eh->stub_sec = NULL;
3867 eh->stub_offset = 0;
3868 eh->target_value = 0;
3869 eh->target_section = NULL;
3870 eh->h = NULL;
3871 eh->id_sec = NULL;
3872 }
3873
3874 return entry;
3875 }
3876
3877 /* Create an entry in the branch hash table. */
3878
3879 static struct bfd_hash_entry *
3880 branch_hash_newfunc (struct bfd_hash_entry *entry,
3881 struct bfd_hash_table *table,
3882 const char *string)
3883 {
3884 /* Allocate the structure if it has not already been allocated by a
3885 subclass. */
3886 if (entry == NULL)
3887 {
3888 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3889 if (entry == NULL)
3890 return entry;
3891 }
3892
3893 /* Call the allocation method of the superclass. */
3894 entry = bfd_hash_newfunc (entry, table, string);
3895 if (entry != NULL)
3896 {
3897 struct ppc_branch_hash_entry *eh;
3898
3899 /* Initialize the local fields. */
3900 eh = (struct ppc_branch_hash_entry *) entry;
3901 eh->offset = 0;
3902 eh->iter = 0;
3903 }
3904
3905 return entry;
3906 }
3907
3908 /* Create an entry in a ppc64 ELF linker hash table. */
3909
3910 static struct bfd_hash_entry *
3911 link_hash_newfunc (struct bfd_hash_entry *entry,
3912 struct bfd_hash_table *table,
3913 const char *string)
3914 {
3915 /* Allocate the structure if it has not already been allocated by a
3916 subclass. */
3917 if (entry == NULL)
3918 {
3919 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3920 if (entry == NULL)
3921 return entry;
3922 }
3923
3924 /* Call the allocation method of the superclass. */
3925 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3926 if (entry != NULL)
3927 {
3928 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3929
3930 memset (&eh->u.stub_cache, 0,
3931 (sizeof (struct ppc_link_hash_entry)
3932 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3933
3934 /* When making function calls, old ABI code references function entry
3935 points (dot symbols), while new ABI code references the function
3936 descriptor symbol. We need to make any combination of reference and
3937 definition work together, without breaking archive linking.
3938
3939 For a defined function "foo" and an undefined call to "bar":
3940 An old object defines "foo" and ".foo", references ".bar" (possibly
3941 "bar" too).
3942 A new object defines "foo" and references "bar".
3943
3944 A new object thus has no problem with its undefined symbols being
3945 satisfied by definitions in an old object. On the other hand, the
3946 old object won't have ".bar" satisfied by a new object.
3947
3948 Keep a list of newly added dot-symbols. */
3949
3950 if (string[0] == '.')
3951 {
3952 struct ppc_link_hash_table *htab;
3953
3954 htab = (struct ppc_link_hash_table *) table;
3955 eh->u.next_dot_sym = htab->dot_syms;
3956 htab->dot_syms = eh;
3957 }
3958 }
3959
3960 return entry;
3961 }
3962
3963 /* Create a ppc64 ELF linker hash table. */
3964
3965 static struct bfd_link_hash_table *
3966 ppc64_elf_link_hash_table_create (bfd *abfd)
3967 {
3968 struct ppc_link_hash_table *htab;
3969 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3970
3971 htab = bfd_zmalloc (amt);
3972 if (htab == NULL)
3973 return NULL;
3974
3975 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3976 sizeof (struct ppc_link_hash_entry),
3977 PPC64_ELF_DATA))
3978 {
3979 free (htab);
3980 return NULL;
3981 }
3982
3983 /* Init the stub hash table too. */
3984 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3985 sizeof (struct ppc_stub_hash_entry)))
3986 return NULL;
3987
3988 /* And the branch hash table. */
3989 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3990 sizeof (struct ppc_branch_hash_entry)))
3991 return NULL;
3992
3993 /* Initializing two fields of the union is just cosmetic. We really
3994 only care about glist, but when compiled on a 32-bit host the
3995 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3996 debugger inspection of these fields look nicer. */
3997 htab->elf.init_got_refcount.refcount = 0;
3998 htab->elf.init_got_refcount.glist = NULL;
3999 htab->elf.init_plt_refcount.refcount = 0;
4000 htab->elf.init_plt_refcount.glist = NULL;
4001 htab->elf.init_got_offset.offset = 0;
4002 htab->elf.init_got_offset.glist = NULL;
4003 htab->elf.init_plt_offset.offset = 0;
4004 htab->elf.init_plt_offset.glist = NULL;
4005
4006 return &htab->elf.root;
4007 }
4008
4009 /* Free the derived linker hash table. */
4010
4011 static void
4012 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4013 {
4014 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4015
4016 bfd_hash_table_free (&ret->stub_hash_table);
4017 bfd_hash_table_free (&ret->branch_hash_table);
4018 _bfd_generic_link_hash_table_free (hash);
4019 }
4020
4021 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4022
4023 void
4024 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4025 {
4026 struct ppc_link_hash_table *htab;
4027
4028 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4029
4030 /* Always hook our dynamic sections into the first bfd, which is the
4031 linker created stub bfd. This ensures that the GOT header is at
4032 the start of the output TOC section. */
4033 htab = ppc_hash_table (info);
4034 if (htab == NULL)
4035 return;
4036 htab->stub_bfd = abfd;
4037 htab->elf.dynobj = abfd;
4038 }
4039
4040 /* Build a name for an entry in the stub hash table. */
4041
4042 static char *
4043 ppc_stub_name (const asection *input_section,
4044 const asection *sym_sec,
4045 const struct ppc_link_hash_entry *h,
4046 const Elf_Internal_Rela *rel)
4047 {
4048 char *stub_name;
4049 bfd_size_type len;
4050
4051 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4052 offsets from a sym as a branch target? In fact, we could
4053 probably assume the addend is always zero. */
4054 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4055
4056 if (h)
4057 {
4058 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4059 stub_name = bfd_malloc (len);
4060 if (stub_name == NULL)
4061 return stub_name;
4062
4063 sprintf (stub_name, "%08x.%s+%x",
4064 input_section->id & 0xffffffff,
4065 h->elf.root.root.string,
4066 (int) rel->r_addend & 0xffffffff);
4067 }
4068 else
4069 {
4070 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4071 stub_name = bfd_malloc (len);
4072 if (stub_name == NULL)
4073 return stub_name;
4074
4075 sprintf (stub_name, "%08x.%x:%x+%x",
4076 input_section->id & 0xffffffff,
4077 sym_sec->id & 0xffffffff,
4078 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4079 (int) rel->r_addend & 0xffffffff);
4080 }
4081 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4082 stub_name[len - 2] = 0;
4083 return stub_name;
4084 }
4085
4086 /* Look up an entry in the stub hash. Stub entries are cached because
4087 creating the stub name takes a bit of time. */
4088
4089 static struct ppc_stub_hash_entry *
4090 ppc_get_stub_entry (const asection *input_section,
4091 const asection *sym_sec,
4092 struct ppc_link_hash_entry *h,
4093 const Elf_Internal_Rela *rel,
4094 struct ppc_link_hash_table *htab)
4095 {
4096 struct ppc_stub_hash_entry *stub_entry;
4097 const asection *id_sec;
4098
4099 /* If this input section is part of a group of sections sharing one
4100 stub section, then use the id of the first section in the group.
4101 Stub names need to include a section id, as there may well be
4102 more than one stub used to reach say, printf, and we need to
4103 distinguish between them. */
4104 id_sec = htab->stub_group[input_section->id].link_sec;
4105
4106 if (h != NULL && h->u.stub_cache != NULL
4107 && h->u.stub_cache->h == h
4108 && h->u.stub_cache->id_sec == id_sec)
4109 {
4110 stub_entry = h->u.stub_cache;
4111 }
4112 else
4113 {
4114 char *stub_name;
4115
4116 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4117 if (stub_name == NULL)
4118 return NULL;
4119
4120 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4121 stub_name, FALSE, FALSE);
4122 if (h != NULL)
4123 h->u.stub_cache = stub_entry;
4124
4125 free (stub_name);
4126 }
4127
4128 return stub_entry;
4129 }
4130
4131 /* Add a new stub entry to the stub hash. Not all fields of the new
4132 stub entry are initialised. */
4133
4134 static struct ppc_stub_hash_entry *
4135 ppc_add_stub (const char *stub_name,
4136 asection *section,
4137 struct ppc_link_hash_table *htab)
4138 {
4139 asection *link_sec;
4140 asection *stub_sec;
4141 struct ppc_stub_hash_entry *stub_entry;
4142
4143 link_sec = htab->stub_group[section->id].link_sec;
4144 stub_sec = htab->stub_group[section->id].stub_sec;
4145 if (stub_sec == NULL)
4146 {
4147 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4148 if (stub_sec == NULL)
4149 {
4150 size_t namelen;
4151 bfd_size_type len;
4152 char *s_name;
4153
4154 namelen = strlen (link_sec->name);
4155 len = namelen + sizeof (STUB_SUFFIX);
4156 s_name = bfd_alloc (htab->stub_bfd, len);
4157 if (s_name == NULL)
4158 return NULL;
4159
4160 memcpy (s_name, link_sec->name, namelen);
4161 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4162 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4163 if (stub_sec == NULL)
4164 return NULL;
4165 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4166 }
4167 htab->stub_group[section->id].stub_sec = stub_sec;
4168 }
4169
4170 /* Enter this entry into the linker stub hash table. */
4171 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4172 TRUE, FALSE);
4173 if (stub_entry == NULL)
4174 {
4175 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4176 section->owner, stub_name);
4177 return NULL;
4178 }
4179
4180 stub_entry->stub_sec = stub_sec;
4181 stub_entry->stub_offset = 0;
4182 stub_entry->id_sec = link_sec;
4183 return stub_entry;
4184 }
4185
4186 /* Create sections for linker generated code. */
4187
4188 static bfd_boolean
4189 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4190 {
4191 struct ppc_link_hash_table *htab;
4192 flagword flags;
4193
4194 htab = ppc_hash_table (info);
4195 if (htab == NULL)
4196 return FALSE;
4197
4198 /* Create .sfpr for code to save and restore fp regs. */
4199 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4200 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4201 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4202 flags);
4203 if (htab->sfpr == NULL
4204 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4205 return FALSE;
4206
4207 /* Create .glink for lazy dynamic linking support. */
4208 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4209 flags);
4210 if (htab->glink == NULL
4211 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4212 return FALSE;
4213
4214 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4215 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4216 if (htab->iplt == NULL
4217 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4218 return FALSE;
4219
4220 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4221 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4222 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4223 ".rela.iplt",
4224 flags);
4225 if (htab->reliplt == NULL
4226 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4227 return FALSE;
4228
4229 /* Create branch lookup table for plt_branch stubs. */
4230 flags = (SEC_ALLOC | SEC_LOAD
4231 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4232 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4233 flags);
4234 if (htab->brlt == NULL
4235 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4236 return FALSE;
4237
4238 if (!info->shared)
4239 return TRUE;
4240
4241 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4242 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4243 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4244 ".rela.branch_lt",
4245 flags);
4246 if (htab->relbrlt == NULL
4247 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4248 return FALSE;
4249
4250 return TRUE;
4251 }
4252
4253 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4254 not already done. */
4255
4256 static bfd_boolean
4257 create_got_section (bfd *abfd, struct bfd_link_info *info)
4258 {
4259 asection *got, *relgot;
4260 flagword flags;
4261 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4262
4263 if (!is_ppc64_elf (abfd))
4264 return FALSE;
4265 if (htab == NULL)
4266 return FALSE;
4267
4268 if (!htab->got)
4269 {
4270 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4271 return FALSE;
4272
4273 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4274 if (!htab->got)
4275 abort ();
4276 }
4277
4278 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4279 | SEC_LINKER_CREATED);
4280
4281 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4282 if (!got
4283 || !bfd_set_section_alignment (abfd, got, 3))
4284 return FALSE;
4285
4286 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4287 flags | SEC_READONLY);
4288 if (!relgot
4289 || ! bfd_set_section_alignment (abfd, relgot, 3))
4290 return FALSE;
4291
4292 ppc64_elf_tdata (abfd)->got = got;
4293 ppc64_elf_tdata (abfd)->relgot = relgot;
4294 return TRUE;
4295 }
4296
4297 /* Create the dynamic sections, and set up shortcuts. */
4298
4299 static bfd_boolean
4300 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4301 {
4302 struct ppc_link_hash_table *htab;
4303
4304 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4305 return FALSE;
4306
4307 htab = ppc_hash_table (info);
4308 if (htab == NULL)
4309 return FALSE;
4310
4311 if (!htab->got)
4312 htab->got = bfd_get_section_by_name (dynobj, ".got");
4313 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4314 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4315 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4316 if (!info->shared)
4317 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4318
4319 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4320 || (!info->shared && !htab->relbss))
4321 abort ();
4322
4323 return TRUE;
4324 }
4325
4326 /* Follow indirect and warning symbol links. */
4327
4328 static inline struct bfd_link_hash_entry *
4329 follow_link (struct bfd_link_hash_entry *h)
4330 {
4331 while (h->type == bfd_link_hash_indirect
4332 || h->type == bfd_link_hash_warning)
4333 h = h->u.i.link;
4334 return h;
4335 }
4336
4337 static inline struct elf_link_hash_entry *
4338 elf_follow_link (struct elf_link_hash_entry *h)
4339 {
4340 return (struct elf_link_hash_entry *) follow_link (&h->root);
4341 }
4342
4343 static inline struct ppc_link_hash_entry *
4344 ppc_follow_link (struct ppc_link_hash_entry *h)
4345 {
4346 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4347 }
4348
4349 /* Merge PLT info on FROM with that on TO. */
4350
4351 static void
4352 move_plt_plist (struct ppc_link_hash_entry *from,
4353 struct ppc_link_hash_entry *to)
4354 {
4355 if (from->elf.plt.plist != NULL)
4356 {
4357 if (to->elf.plt.plist != NULL)
4358 {
4359 struct plt_entry **entp;
4360 struct plt_entry *ent;
4361
4362 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4363 {
4364 struct plt_entry *dent;
4365
4366 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4367 if (dent->addend == ent->addend)
4368 {
4369 dent->plt.refcount += ent->plt.refcount;
4370 *entp = ent->next;
4371 break;
4372 }
4373 if (dent == NULL)
4374 entp = &ent->next;
4375 }
4376 *entp = to->elf.plt.plist;
4377 }
4378
4379 to->elf.plt.plist = from->elf.plt.plist;
4380 from->elf.plt.plist = NULL;
4381 }
4382 }
4383
4384 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4385
4386 static void
4387 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4388 struct elf_link_hash_entry *dir,
4389 struct elf_link_hash_entry *ind)
4390 {
4391 struct ppc_link_hash_entry *edir, *eind;
4392
4393 edir = (struct ppc_link_hash_entry *) dir;
4394 eind = (struct ppc_link_hash_entry *) ind;
4395
4396 /* Copy over any dynamic relocs we may have on the indirect sym. */
4397 if (eind->dyn_relocs != NULL)
4398 {
4399 if (edir->dyn_relocs != NULL)
4400 {
4401 struct ppc_dyn_relocs **pp;
4402 struct ppc_dyn_relocs *p;
4403
4404 /* Add reloc counts against the indirect sym to the direct sym
4405 list. Merge any entries against the same section. */
4406 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4407 {
4408 struct ppc_dyn_relocs *q;
4409
4410 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4411 if (q->sec == p->sec)
4412 {
4413 q->pc_count += p->pc_count;
4414 q->count += p->count;
4415 *pp = p->next;
4416 break;
4417 }
4418 if (q == NULL)
4419 pp = &p->next;
4420 }
4421 *pp = edir->dyn_relocs;
4422 }
4423
4424 edir->dyn_relocs = eind->dyn_relocs;
4425 eind->dyn_relocs = NULL;
4426 }
4427
4428 edir->is_func |= eind->is_func;
4429 edir->is_func_descriptor |= eind->is_func_descriptor;
4430 edir->tls_mask |= eind->tls_mask;
4431 if (eind->oh != NULL)
4432 edir->oh = ppc_follow_link (eind->oh);
4433
4434 /* If called to transfer flags for a weakdef during processing
4435 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4436 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4437 if (!(ELIMINATE_COPY_RELOCS
4438 && eind->elf.root.type != bfd_link_hash_indirect
4439 && edir->elf.dynamic_adjusted))
4440 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4441
4442 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4443 edir->elf.ref_regular |= eind->elf.ref_regular;
4444 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4445 edir->elf.needs_plt |= eind->elf.needs_plt;
4446
4447 /* If we were called to copy over info for a weak sym, that's all. */
4448 if (eind->elf.root.type != bfd_link_hash_indirect)
4449 return;
4450
4451 /* Copy over got entries that we may have already seen to the
4452 symbol which just became indirect. */
4453 if (eind->elf.got.glist != NULL)
4454 {
4455 if (edir->elf.got.glist != NULL)
4456 {
4457 struct got_entry **entp;
4458 struct got_entry *ent;
4459
4460 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4461 {
4462 struct got_entry *dent;
4463
4464 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4465 if (dent->addend == ent->addend
4466 && dent->owner == ent->owner
4467 && dent->tls_type == ent->tls_type)
4468 {
4469 dent->got.refcount += ent->got.refcount;
4470 *entp = ent->next;
4471 break;
4472 }
4473 if (dent == NULL)
4474 entp = &ent->next;
4475 }
4476 *entp = edir->elf.got.glist;
4477 }
4478
4479 edir->elf.got.glist = eind->elf.got.glist;
4480 eind->elf.got.glist = NULL;
4481 }
4482
4483 /* And plt entries. */
4484 move_plt_plist (eind, edir);
4485
4486 if (eind->elf.dynindx != -1)
4487 {
4488 if (edir->elf.dynindx != -1)
4489 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4490 edir->elf.dynstr_index);
4491 edir->elf.dynindx = eind->elf.dynindx;
4492 edir->elf.dynstr_index = eind->elf.dynstr_index;
4493 eind->elf.dynindx = -1;
4494 eind->elf.dynstr_index = 0;
4495 }
4496 }
4497
4498 /* Find the function descriptor hash entry from the given function code
4499 hash entry FH. Link the entries via their OH fields. */
4500
4501 static struct ppc_link_hash_entry *
4502 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4503 {
4504 struct ppc_link_hash_entry *fdh = fh->oh;
4505
4506 if (fdh == NULL)
4507 {
4508 const char *fd_name = fh->elf.root.root.string + 1;
4509
4510 fdh = (struct ppc_link_hash_entry *)
4511 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4512 if (fdh == NULL)
4513 return fdh;
4514
4515 fdh->is_func_descriptor = 1;
4516 fdh->oh = fh;
4517 fh->is_func = 1;
4518 fh->oh = fdh;
4519 }
4520
4521 return ppc_follow_link (fdh);
4522 }
4523
4524 /* Make a fake function descriptor sym for the code sym FH. */
4525
4526 static struct ppc_link_hash_entry *
4527 make_fdh (struct bfd_link_info *info,
4528 struct ppc_link_hash_entry *fh)
4529 {
4530 bfd *abfd;
4531 asymbol *newsym;
4532 struct bfd_link_hash_entry *bh;
4533 struct ppc_link_hash_entry *fdh;
4534
4535 abfd = fh->elf.root.u.undef.abfd;
4536 newsym = bfd_make_empty_symbol (abfd);
4537 newsym->name = fh->elf.root.root.string + 1;
4538 newsym->section = bfd_und_section_ptr;
4539 newsym->value = 0;
4540 newsym->flags = BSF_WEAK;
4541
4542 bh = NULL;
4543 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4544 newsym->flags, newsym->section,
4545 newsym->value, NULL, FALSE, FALSE,
4546 &bh))
4547 return NULL;
4548
4549 fdh = (struct ppc_link_hash_entry *) bh;
4550 fdh->elf.non_elf = 0;
4551 fdh->fake = 1;
4552 fdh->is_func_descriptor = 1;
4553 fdh->oh = fh;
4554 fh->is_func = 1;
4555 fh->oh = fdh;
4556 return fdh;
4557 }
4558
4559 /* Fix function descriptor symbols defined in .opd sections to be
4560 function type. */
4561
4562 static bfd_boolean
4563 ppc64_elf_add_symbol_hook (bfd *ibfd,
4564 struct bfd_link_info *info,
4565 Elf_Internal_Sym *isym,
4566 const char **name ATTRIBUTE_UNUSED,
4567 flagword *flags ATTRIBUTE_UNUSED,
4568 asection **sec,
4569 bfd_vma *value ATTRIBUTE_UNUSED)
4570 {
4571 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4572 {
4573 if ((ibfd->flags & DYNAMIC) == 0)
4574 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4575 }
4576 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4577 ;
4578 else if (*sec != NULL
4579 && strcmp ((*sec)->name, ".opd") == 0)
4580 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4581
4582 return TRUE;
4583 }
4584
4585 /* This function makes an old ABI object reference to ".bar" cause the
4586 inclusion of a new ABI object archive that defines "bar".
4587 NAME is a symbol defined in an archive. Return a symbol in the hash
4588 table that might be satisfied by the archive symbols. */
4589
4590 static struct elf_link_hash_entry *
4591 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4592 struct bfd_link_info *info,
4593 const char *name)
4594 {
4595 struct elf_link_hash_entry *h;
4596 char *dot_name;
4597 size_t len;
4598
4599 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4600 if (h != NULL
4601 /* Don't return this sym if it is a fake function descriptor
4602 created by add_symbol_adjust. */
4603 && !(h->root.type == bfd_link_hash_undefweak
4604 && ((struct ppc_link_hash_entry *) h)->fake))
4605 return h;
4606
4607 if (name[0] == '.')
4608 return h;
4609
4610 len = strlen (name);
4611 dot_name = bfd_alloc (abfd, len + 2);
4612 if (dot_name == NULL)
4613 return (struct elf_link_hash_entry *) 0 - 1;
4614 dot_name[0] = '.';
4615 memcpy (dot_name + 1, name, len + 1);
4616 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4617 bfd_release (abfd, dot_name);
4618 return h;
4619 }
4620
4621 /* This function satisfies all old ABI object references to ".bar" if a
4622 new ABI object defines "bar". Well, at least, undefined dot symbols
4623 are made weak. This stops later archive searches from including an
4624 object if we already have a function descriptor definition. It also
4625 prevents the linker complaining about undefined symbols.
4626 We also check and correct mismatched symbol visibility here. The
4627 most restrictive visibility of the function descriptor and the
4628 function entry symbol is used. */
4629
4630 static bfd_boolean
4631 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4632 {
4633 struct ppc_link_hash_table *htab;
4634 struct ppc_link_hash_entry *fdh;
4635
4636 if (eh->elf.root.type == bfd_link_hash_indirect)
4637 return TRUE;
4638
4639 if (eh->elf.root.type == bfd_link_hash_warning)
4640 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4641
4642 if (eh->elf.root.root.string[0] != '.')
4643 abort ();
4644
4645 htab = ppc_hash_table (info);
4646 if (htab == NULL)
4647 return FALSE;
4648
4649 fdh = lookup_fdh (eh, htab);
4650 if (fdh == NULL)
4651 {
4652 if (!info->relocatable
4653 && (eh->elf.root.type == bfd_link_hash_undefined
4654 || eh->elf.root.type == bfd_link_hash_undefweak)
4655 && eh->elf.ref_regular)
4656 {
4657 /* Make an undefweak function descriptor sym, which is enough to
4658 pull in an --as-needed shared lib, but won't cause link
4659 errors. Archives are handled elsewhere. */
4660 fdh = make_fdh (info, eh);
4661 if (fdh == NULL)
4662 return FALSE;
4663 fdh->elf.ref_regular = 1;
4664 }
4665 }
4666 else
4667 {
4668 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4669 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4670 if (entry_vis < descr_vis)
4671 fdh->elf.other += entry_vis - descr_vis;
4672 else if (entry_vis > descr_vis)
4673 eh->elf.other += descr_vis - entry_vis;
4674
4675 if ((fdh->elf.root.type == bfd_link_hash_defined
4676 || fdh->elf.root.type == bfd_link_hash_defweak)
4677 && eh->elf.root.type == bfd_link_hash_undefined)
4678 {
4679 eh->elf.root.type = bfd_link_hash_undefweak;
4680 eh->was_undefined = 1;
4681 htab->twiddled_syms = 1;
4682 }
4683 }
4684
4685 return TRUE;
4686 }
4687
4688 /* Process list of dot-symbols we made in link_hash_newfunc. */
4689
4690 static bfd_boolean
4691 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4692 {
4693 struct ppc_link_hash_table *htab;
4694 struct ppc_link_hash_entry **p, *eh;
4695
4696 if (!is_ppc64_elf (info->output_bfd))
4697 return TRUE;
4698 htab = ppc_hash_table (info);
4699 if (htab == NULL)
4700 return FALSE;
4701
4702 if (is_ppc64_elf (ibfd))
4703 {
4704 p = &htab->dot_syms;
4705 while ((eh = *p) != NULL)
4706 {
4707 *p = NULL;
4708 if (!add_symbol_adjust (eh, info))
4709 return FALSE;
4710 p = &eh->u.next_dot_sym;
4711 }
4712 }
4713
4714 /* Clear the list for non-ppc64 input files. */
4715 p = &htab->dot_syms;
4716 while ((eh = *p) != NULL)
4717 {
4718 *p = NULL;
4719 p = &eh->u.next_dot_sym;
4720 }
4721
4722 /* We need to fix the undefs list for any syms we have twiddled to
4723 undef_weak. */
4724 if (htab->twiddled_syms)
4725 {
4726 bfd_link_repair_undef_list (&htab->elf.root);
4727 htab->twiddled_syms = 0;
4728 }
4729 return TRUE;
4730 }
4731
4732 /* Undo hash table changes when an --as-needed input file is determined
4733 not to be needed. */
4734
4735 static bfd_boolean
4736 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4737 struct bfd_link_info *info)
4738 {
4739 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4740
4741 if (htab == NULL)
4742 return FALSE;
4743
4744 htab->dot_syms = NULL;
4745 return TRUE;
4746 }
4747
4748 static struct plt_entry **
4749 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4750 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4751 {
4752 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4753 struct plt_entry **local_plt;
4754 unsigned char *local_got_tls_masks;
4755
4756 if (local_got_ents == NULL)
4757 {
4758 bfd_size_type size = symtab_hdr->sh_info;
4759
4760 size *= (sizeof (*local_got_ents)
4761 + sizeof (*local_plt)
4762 + sizeof (*local_got_tls_masks));
4763 local_got_ents = bfd_zalloc (abfd, size);
4764 if (local_got_ents == NULL)
4765 return NULL;
4766 elf_local_got_ents (abfd) = local_got_ents;
4767 }
4768
4769 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4770 {
4771 struct got_entry *ent;
4772
4773 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4774 if (ent->addend == r_addend
4775 && ent->owner == abfd
4776 && ent->tls_type == tls_type)
4777 break;
4778 if (ent == NULL)
4779 {
4780 bfd_size_type amt = sizeof (*ent);
4781 ent = bfd_alloc (abfd, amt);
4782 if (ent == NULL)
4783 return FALSE;
4784 ent->next = local_got_ents[r_symndx];
4785 ent->addend = r_addend;
4786 ent->owner = abfd;
4787 ent->tls_type = tls_type;
4788 ent->is_indirect = FALSE;
4789 ent->got.refcount = 0;
4790 local_got_ents[r_symndx] = ent;
4791 }
4792 ent->got.refcount += 1;
4793 }
4794
4795 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4796 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4797 local_got_tls_masks[r_symndx] |= tls_type;
4798
4799 return local_plt + r_symndx;
4800 }
4801
4802 static bfd_boolean
4803 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4804 {
4805 struct plt_entry *ent;
4806
4807 for (ent = *plist; ent != NULL; ent = ent->next)
4808 if (ent->addend == addend)
4809 break;
4810 if (ent == NULL)
4811 {
4812 bfd_size_type amt = sizeof (*ent);
4813 ent = bfd_alloc (abfd, amt);
4814 if (ent == NULL)
4815 return FALSE;
4816 ent->next = *plist;
4817 ent->addend = addend;
4818 ent->plt.refcount = 0;
4819 *plist = ent;
4820 }
4821 ent->plt.refcount += 1;
4822 return TRUE;
4823 }
4824
4825 static bfd_boolean
4826 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4827 {
4828 return (r_type == R_PPC64_REL24
4829 || r_type == R_PPC64_REL14
4830 || r_type == R_PPC64_REL14_BRTAKEN
4831 || r_type == R_PPC64_REL14_BRNTAKEN
4832 || r_type == R_PPC64_ADDR24
4833 || r_type == R_PPC64_ADDR14
4834 || r_type == R_PPC64_ADDR14_BRTAKEN
4835 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4836 }
4837
4838 /* Look through the relocs for a section during the first phase, and
4839 calculate needed space in the global offset table, procedure
4840 linkage table, and dynamic reloc sections. */
4841
4842 static bfd_boolean
4843 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4844 asection *sec, const Elf_Internal_Rela *relocs)
4845 {
4846 struct ppc_link_hash_table *htab;
4847 Elf_Internal_Shdr *symtab_hdr;
4848 struct elf_link_hash_entry **sym_hashes;
4849 const Elf_Internal_Rela *rel;
4850 const Elf_Internal_Rela *rel_end;
4851 asection *sreloc;
4852 asection **opd_sym_map;
4853 struct elf_link_hash_entry *tga, *dottga;
4854
4855 if (info->relocatable)
4856 return TRUE;
4857
4858 /* Don't do anything special with non-loaded, non-alloced sections.
4859 In particular, any relocs in such sections should not affect GOT
4860 and PLT reference counting (ie. we don't allow them to create GOT
4861 or PLT entries), there's no possibility or desire to optimize TLS
4862 relocs, and there's not much point in propagating relocs to shared
4863 libs that the dynamic linker won't relocate. */
4864 if ((sec->flags & SEC_ALLOC) == 0)
4865 return TRUE;
4866
4867 BFD_ASSERT (is_ppc64_elf (abfd));
4868
4869 htab = ppc_hash_table (info);
4870 if (htab == NULL)
4871 return FALSE;
4872
4873 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4874 FALSE, FALSE, TRUE);
4875 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4876 FALSE, FALSE, TRUE);
4877 symtab_hdr = &elf_symtab_hdr (abfd);
4878 sym_hashes = elf_sym_hashes (abfd);
4879 sreloc = NULL;
4880 opd_sym_map = NULL;
4881 if (strcmp (sec->name, ".opd") == 0)
4882 {
4883 /* Garbage collection needs some extra help with .opd sections.
4884 We don't want to necessarily keep everything referenced by
4885 relocs in .opd, as that would keep all functions. Instead,
4886 if we reference an .opd symbol (a function descriptor), we
4887 want to keep the function code symbol's section. This is
4888 easy for global symbols, but for local syms we need to keep
4889 information about the associated function section. */
4890 bfd_size_type amt;
4891
4892 amt = sec->size * sizeof (*opd_sym_map) / 8;
4893 opd_sym_map = bfd_zalloc (abfd, amt);
4894 if (opd_sym_map == NULL)
4895 return FALSE;
4896 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4897 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4898 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4899 }
4900
4901 if (htab->sfpr == NULL
4902 && !create_linkage_sections (htab->elf.dynobj, info))
4903 return FALSE;
4904
4905 rel_end = relocs + sec->reloc_count;
4906 for (rel = relocs; rel < rel_end; rel++)
4907 {
4908 unsigned long r_symndx;
4909 struct elf_link_hash_entry *h;
4910 enum elf_ppc64_reloc_type r_type;
4911 int tls_type;
4912 struct _ppc64_elf_section_data *ppc64_sec;
4913 struct plt_entry **ifunc;
4914
4915 r_symndx = ELF64_R_SYM (rel->r_info);
4916 if (r_symndx < symtab_hdr->sh_info)
4917 h = NULL;
4918 else
4919 {
4920 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4921 h = elf_follow_link (h);
4922 }
4923
4924 tls_type = 0;
4925 ifunc = NULL;
4926 if (h != NULL)
4927 {
4928 if (h->type == STT_GNU_IFUNC)
4929 {
4930 h->needs_plt = 1;
4931 ifunc = &h->plt.plist;
4932 }
4933 }
4934 else
4935 {
4936 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4937 abfd, r_symndx);
4938 if (isym == NULL)
4939 return FALSE;
4940
4941 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4942 {
4943 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4944 rel->r_addend, PLT_IFUNC);
4945 if (ifunc == NULL)
4946 return FALSE;
4947 }
4948 }
4949 r_type = ELF64_R_TYPE (rel->r_info);
4950 if (is_branch_reloc (r_type))
4951 {
4952 if (h != NULL && (h == tga || h == dottga))
4953 {
4954 if (rel != relocs
4955 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4956 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4957 /* We have a new-style __tls_get_addr call with a marker
4958 reloc. */
4959 ;
4960 else
4961 /* Mark this section as having an old-style call. */
4962 sec->has_tls_get_addr_call = 1;
4963 }
4964
4965 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4966 if (ifunc != NULL
4967 && !update_plt_info (abfd, ifunc, rel->r_addend))
4968 return FALSE;
4969 }
4970
4971 switch (r_type)
4972 {
4973 case R_PPC64_TLSGD:
4974 case R_PPC64_TLSLD:
4975 /* These special tls relocs tie a call to __tls_get_addr with
4976 its parameter symbol. */
4977 break;
4978
4979 case R_PPC64_GOT_TLSLD16:
4980 case R_PPC64_GOT_TLSLD16_LO:
4981 case R_PPC64_GOT_TLSLD16_HI:
4982 case R_PPC64_GOT_TLSLD16_HA:
4983 tls_type = TLS_TLS | TLS_LD;
4984 goto dogottls;
4985
4986 case R_PPC64_GOT_TLSGD16:
4987 case R_PPC64_GOT_TLSGD16_LO:
4988 case R_PPC64_GOT_TLSGD16_HI:
4989 case R_PPC64_GOT_TLSGD16_HA:
4990 tls_type = TLS_TLS | TLS_GD;
4991 goto dogottls;
4992
4993 case R_PPC64_GOT_TPREL16_DS:
4994 case R_PPC64_GOT_TPREL16_LO_DS:
4995 case R_PPC64_GOT_TPREL16_HI:
4996 case R_PPC64_GOT_TPREL16_HA:
4997 if (!info->executable)
4998 info->flags |= DF_STATIC_TLS;
4999 tls_type = TLS_TLS | TLS_TPREL;
5000 goto dogottls;
5001
5002 case R_PPC64_GOT_DTPREL16_DS:
5003 case R_PPC64_GOT_DTPREL16_LO_DS:
5004 case R_PPC64_GOT_DTPREL16_HI:
5005 case R_PPC64_GOT_DTPREL16_HA:
5006 tls_type = TLS_TLS | TLS_DTPREL;
5007 dogottls:
5008 sec->has_tls_reloc = 1;
5009 /* Fall thru */
5010
5011 case R_PPC64_GOT16:
5012 case R_PPC64_GOT16_DS:
5013 case R_PPC64_GOT16_HA:
5014 case R_PPC64_GOT16_HI:
5015 case R_PPC64_GOT16_LO:
5016 case R_PPC64_GOT16_LO_DS:
5017 /* This symbol requires a global offset table entry. */
5018 sec->has_toc_reloc = 1;
5019 if (r_type == R_PPC64_GOT_TLSLD16
5020 || r_type == R_PPC64_GOT_TLSGD16
5021 || r_type == R_PPC64_GOT_TPREL16_DS
5022 || r_type == R_PPC64_GOT_DTPREL16_DS
5023 || r_type == R_PPC64_GOT16
5024 || r_type == R_PPC64_GOT16_DS)
5025 {
5026 htab->do_multi_toc = 1;
5027 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5028 }
5029
5030 if (ppc64_elf_tdata (abfd)->got == NULL
5031 && !create_got_section (abfd, info))
5032 return FALSE;
5033
5034 if (h != NULL)
5035 {
5036 struct ppc_link_hash_entry *eh;
5037 struct got_entry *ent;
5038
5039 eh = (struct ppc_link_hash_entry *) h;
5040 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5041 if (ent->addend == rel->r_addend
5042 && ent->owner == abfd
5043 && ent->tls_type == tls_type)
5044 break;
5045 if (ent == NULL)
5046 {
5047 bfd_size_type amt = sizeof (*ent);
5048 ent = bfd_alloc (abfd, amt);
5049 if (ent == NULL)
5050 return FALSE;
5051 ent->next = eh->elf.got.glist;
5052 ent->addend = rel->r_addend;
5053 ent->owner = abfd;
5054 ent->tls_type = tls_type;
5055 ent->is_indirect = FALSE;
5056 ent->got.refcount = 0;
5057 eh->elf.got.glist = ent;
5058 }
5059 ent->got.refcount += 1;
5060 eh->tls_mask |= tls_type;
5061 }
5062 else
5063 /* This is a global offset table entry for a local symbol. */
5064 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5065 rel->r_addend, tls_type))
5066 return FALSE;
5067 break;
5068
5069 case R_PPC64_PLT16_HA:
5070 case R_PPC64_PLT16_HI:
5071 case R_PPC64_PLT16_LO:
5072 case R_PPC64_PLT32:
5073 case R_PPC64_PLT64:
5074 /* This symbol requires a procedure linkage table entry. We
5075 actually build the entry in adjust_dynamic_symbol,
5076 because this might be a case of linking PIC code without
5077 linking in any dynamic objects, in which case we don't
5078 need to generate a procedure linkage table after all. */
5079 if (h == NULL)
5080 {
5081 /* It does not make sense to have a procedure linkage
5082 table entry for a local symbol. */
5083 bfd_set_error (bfd_error_bad_value);
5084 return FALSE;
5085 }
5086 else
5087 {
5088 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5089 return FALSE;
5090 h->needs_plt = 1;
5091 if (h->root.root.string[0] == '.'
5092 && h->root.root.string[1] != '\0')
5093 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5094 }
5095 break;
5096
5097 /* The following relocations don't need to propagate the
5098 relocation if linking a shared object since they are
5099 section relative. */
5100 case R_PPC64_SECTOFF:
5101 case R_PPC64_SECTOFF_LO:
5102 case R_PPC64_SECTOFF_HI:
5103 case R_PPC64_SECTOFF_HA:
5104 case R_PPC64_SECTOFF_DS:
5105 case R_PPC64_SECTOFF_LO_DS:
5106 case R_PPC64_DTPREL16:
5107 case R_PPC64_DTPREL16_LO:
5108 case R_PPC64_DTPREL16_HI:
5109 case R_PPC64_DTPREL16_HA:
5110 case R_PPC64_DTPREL16_DS:
5111 case R_PPC64_DTPREL16_LO_DS:
5112 case R_PPC64_DTPREL16_HIGHER:
5113 case R_PPC64_DTPREL16_HIGHERA:
5114 case R_PPC64_DTPREL16_HIGHEST:
5115 case R_PPC64_DTPREL16_HIGHESTA:
5116 break;
5117
5118 /* Nor do these. */
5119 case R_PPC64_REL16:
5120 case R_PPC64_REL16_LO:
5121 case R_PPC64_REL16_HI:
5122 case R_PPC64_REL16_HA:
5123 break;
5124
5125 case R_PPC64_TOC16:
5126 case R_PPC64_TOC16_DS:
5127 htab->do_multi_toc = 1;
5128 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5129 case R_PPC64_TOC16_LO:
5130 case R_PPC64_TOC16_HI:
5131 case R_PPC64_TOC16_HA:
5132 case R_PPC64_TOC16_LO_DS:
5133 sec->has_toc_reloc = 1;
5134 break;
5135
5136 /* This relocation describes the C++ object vtable hierarchy.
5137 Reconstruct it for later use during GC. */
5138 case R_PPC64_GNU_VTINHERIT:
5139 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5140 return FALSE;
5141 break;
5142
5143 /* This relocation describes which C++ vtable entries are actually
5144 used. Record for later use during GC. */
5145 case R_PPC64_GNU_VTENTRY:
5146 BFD_ASSERT (h != NULL);
5147 if (h != NULL
5148 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5149 return FALSE;
5150 break;
5151
5152 case R_PPC64_REL14:
5153 case R_PPC64_REL14_BRTAKEN:
5154 case R_PPC64_REL14_BRNTAKEN:
5155 {
5156 asection *dest = NULL;
5157
5158 /* Heuristic: If jumping outside our section, chances are
5159 we are going to need a stub. */
5160 if (h != NULL)
5161 {
5162 /* If the sym is weak it may be overridden later, so
5163 don't assume we know where a weak sym lives. */
5164 if (h->root.type == bfd_link_hash_defined)
5165 dest = h->root.u.def.section;
5166 }
5167 else
5168 {
5169 Elf_Internal_Sym *isym;
5170
5171 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5172 abfd, r_symndx);
5173 if (isym == NULL)
5174 return FALSE;
5175
5176 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5177 }
5178
5179 if (dest != sec)
5180 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5181 }
5182 /* Fall through. */
5183
5184 case R_PPC64_REL24:
5185 if (h != NULL && ifunc == NULL)
5186 {
5187 /* We may need a .plt entry if the function this reloc
5188 refers to is in a shared lib. */
5189 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5190 return FALSE;
5191 h->needs_plt = 1;
5192 if (h->root.root.string[0] == '.'
5193 && h->root.root.string[1] != '\0')
5194 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5195 if (h == tga || h == dottga)
5196 sec->has_tls_reloc = 1;
5197 }
5198 break;
5199
5200 case R_PPC64_TPREL64:
5201 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5202 if (!info->executable)
5203 info->flags |= DF_STATIC_TLS;
5204 goto dotlstoc;
5205
5206 case R_PPC64_DTPMOD64:
5207 if (rel + 1 < rel_end
5208 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5209 && rel[1].r_offset == rel->r_offset + 8)
5210 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5211 else
5212 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5213 goto dotlstoc;
5214
5215 case R_PPC64_DTPREL64:
5216 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5217 if (rel != relocs
5218 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5219 && rel[-1].r_offset == rel->r_offset - 8)
5220 /* This is the second reloc of a dtpmod, dtprel pair.
5221 Don't mark with TLS_DTPREL. */
5222 goto dodyn;
5223
5224 dotlstoc:
5225 sec->has_tls_reloc = 1;
5226 if (h != NULL)
5227 {
5228 struct ppc_link_hash_entry *eh;
5229 eh = (struct ppc_link_hash_entry *) h;
5230 eh->tls_mask |= tls_type;
5231 }
5232 else
5233 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5234 rel->r_addend, tls_type))
5235 return FALSE;
5236
5237 ppc64_sec = ppc64_elf_section_data (sec);
5238 if (ppc64_sec->sec_type != sec_toc)
5239 {
5240 bfd_size_type amt;
5241
5242 /* One extra to simplify get_tls_mask. */
5243 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5244 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5245 if (ppc64_sec->u.toc.symndx == NULL)
5246 return FALSE;
5247 amt = sec->size * sizeof (bfd_vma) / 8;
5248 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5249 if (ppc64_sec->u.toc.add == NULL)
5250 return FALSE;
5251 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5252 ppc64_sec->sec_type = sec_toc;
5253 }
5254 BFD_ASSERT (rel->r_offset % 8 == 0);
5255 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5256 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5257
5258 /* Mark the second slot of a GD or LD entry.
5259 -1 to indicate GD and -2 to indicate LD. */
5260 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5261 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5262 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5263 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5264 goto dodyn;
5265
5266 case R_PPC64_TPREL16:
5267 case R_PPC64_TPREL16_LO:
5268 case R_PPC64_TPREL16_HI:
5269 case R_PPC64_TPREL16_HA:
5270 case R_PPC64_TPREL16_DS:
5271 case R_PPC64_TPREL16_LO_DS:
5272 case R_PPC64_TPREL16_HIGHER:
5273 case R_PPC64_TPREL16_HIGHERA:
5274 case R_PPC64_TPREL16_HIGHEST:
5275 case R_PPC64_TPREL16_HIGHESTA:
5276 if (info->shared)
5277 {
5278 if (!info->executable)
5279 info->flags |= DF_STATIC_TLS;
5280 goto dodyn;
5281 }
5282 break;
5283
5284 case R_PPC64_ADDR64:
5285 if (opd_sym_map != NULL
5286 && rel + 1 < rel_end
5287 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5288 {
5289 if (h != NULL)
5290 {
5291 if (h->root.root.string[0] == '.'
5292 && h->root.root.string[1] != 0
5293 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5294 ;
5295 else
5296 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5297 }
5298 else
5299 {
5300 asection *s;
5301 Elf_Internal_Sym *isym;
5302
5303 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5304 abfd, r_symndx);
5305 if (isym == NULL)
5306 return FALSE;
5307
5308 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5309 if (s != NULL && s != sec)
5310 opd_sym_map[rel->r_offset / 8] = s;
5311 }
5312 }
5313 /* Fall through. */
5314
5315 case R_PPC64_REL30:
5316 case R_PPC64_REL32:
5317 case R_PPC64_REL64:
5318 case R_PPC64_ADDR14:
5319 case R_PPC64_ADDR14_BRNTAKEN:
5320 case R_PPC64_ADDR14_BRTAKEN:
5321 case R_PPC64_ADDR16:
5322 case R_PPC64_ADDR16_DS:
5323 case R_PPC64_ADDR16_HA:
5324 case R_PPC64_ADDR16_HI:
5325 case R_PPC64_ADDR16_HIGHER:
5326 case R_PPC64_ADDR16_HIGHERA:
5327 case R_PPC64_ADDR16_HIGHEST:
5328 case R_PPC64_ADDR16_HIGHESTA:
5329 case R_PPC64_ADDR16_LO:
5330 case R_PPC64_ADDR16_LO_DS:
5331 case R_PPC64_ADDR24:
5332 case R_PPC64_ADDR32:
5333 case R_PPC64_UADDR16:
5334 case R_PPC64_UADDR32:
5335 case R_PPC64_UADDR64:
5336 case R_PPC64_TOC:
5337 if (h != NULL && !info->shared)
5338 /* We may need a copy reloc. */
5339 h->non_got_ref = 1;
5340
5341 /* Don't propagate .opd relocs. */
5342 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5343 break;
5344
5345 /* If we are creating a shared library, and this is a reloc
5346 against a global symbol, or a non PC relative reloc
5347 against a local symbol, then we need to copy the reloc
5348 into the shared library. However, if we are linking with
5349 -Bsymbolic, we do not need to copy a reloc against a
5350 global symbol which is defined in an object we are
5351 including in the link (i.e., DEF_REGULAR is set). At
5352 this point we have not seen all the input files, so it is
5353 possible that DEF_REGULAR is not set now but will be set
5354 later (it is never cleared). In case of a weak definition,
5355 DEF_REGULAR may be cleared later by a strong definition in
5356 a shared library. We account for that possibility below by
5357 storing information in the dyn_relocs field of the hash
5358 table entry. A similar situation occurs when creating
5359 shared libraries and symbol visibility changes render the
5360 symbol local.
5361
5362 If on the other hand, we are creating an executable, we
5363 may need to keep relocations for symbols satisfied by a
5364 dynamic library if we manage to avoid copy relocs for the
5365 symbol. */
5366 dodyn:
5367 if ((info->shared
5368 && (must_be_dyn_reloc (info, r_type)
5369 || (h != NULL
5370 && (! info->symbolic
5371 || h->root.type == bfd_link_hash_defweak
5372 || !h->def_regular))))
5373 || (ELIMINATE_COPY_RELOCS
5374 && !info->shared
5375 && h != NULL
5376 && (h->root.type == bfd_link_hash_defweak
5377 || !h->def_regular))
5378 || (!info->shared
5379 && ifunc != NULL))
5380 {
5381 struct ppc_dyn_relocs *p;
5382 struct ppc_dyn_relocs **head;
5383
5384 /* We must copy these reloc types into the output file.
5385 Create a reloc section in dynobj and make room for
5386 this reloc. */
5387 if (sreloc == NULL)
5388 {
5389 sreloc = _bfd_elf_make_dynamic_reloc_section
5390 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5391
5392 if (sreloc == NULL)
5393 return FALSE;
5394 }
5395
5396 /* If this is a global symbol, we count the number of
5397 relocations we need for this symbol. */
5398 if (h != NULL)
5399 {
5400 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5401 }
5402 else
5403 {
5404 /* Track dynamic relocs needed for local syms too.
5405 We really need local syms available to do this
5406 easily. Oh well. */
5407 asection *s;
5408 void *vpp;
5409 Elf_Internal_Sym *isym;
5410
5411 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5412 abfd, r_symndx);
5413 if (isym == NULL)
5414 return FALSE;
5415
5416 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5417 if (s == NULL)
5418 s = sec;
5419
5420 vpp = &elf_section_data (s)->local_dynrel;
5421 head = (struct ppc_dyn_relocs **) vpp;
5422 }
5423
5424 p = *head;
5425 if (p == NULL || p->sec != sec)
5426 {
5427 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5428 if (p == NULL)
5429 return FALSE;
5430 p->next = *head;
5431 *head = p;
5432 p->sec = sec;
5433 p->count = 0;
5434 p->pc_count = 0;
5435 }
5436
5437 p->count += 1;
5438 if (!must_be_dyn_reloc (info, r_type))
5439 p->pc_count += 1;
5440 }
5441 break;
5442
5443 default:
5444 break;
5445 }
5446 }
5447
5448 return TRUE;
5449 }
5450
5451 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5452 of the code entry point, and its section. */
5453
5454 static bfd_vma
5455 opd_entry_value (asection *opd_sec,
5456 bfd_vma offset,
5457 asection **code_sec,
5458 bfd_vma *code_off)
5459 {
5460 bfd *opd_bfd = opd_sec->owner;
5461 Elf_Internal_Rela *relocs;
5462 Elf_Internal_Rela *lo, *hi, *look;
5463 bfd_vma val;
5464
5465 /* No relocs implies we are linking a --just-symbols object. */
5466 if (opd_sec->reloc_count == 0)
5467 {
5468 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5469 return (bfd_vma) -1;
5470
5471 if (code_sec != NULL)
5472 {
5473 asection *sec, *likely = NULL;
5474 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5475 if (sec->vma <= val
5476 && (sec->flags & SEC_LOAD) != 0
5477 && (sec->flags & SEC_ALLOC) != 0)
5478 likely = sec;
5479 if (likely != NULL)
5480 {
5481 *code_sec = likely;
5482 if (code_off != NULL)
5483 *code_off = val - likely->vma;
5484 }
5485 }
5486 return val;
5487 }
5488
5489 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5490
5491 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5492 if (relocs == NULL)
5493 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5494
5495 /* Go find the opd reloc at the sym address. */
5496 lo = relocs;
5497 BFD_ASSERT (lo != NULL);
5498 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5499 val = (bfd_vma) -1;
5500 while (lo < hi)
5501 {
5502 look = lo + (hi - lo) / 2;
5503 if (look->r_offset < offset)
5504 lo = look + 1;
5505 else if (look->r_offset > offset)
5506 hi = look;
5507 else
5508 {
5509 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5510
5511 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5512 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5513 {
5514 unsigned long symndx = ELF64_R_SYM (look->r_info);
5515 asection *sec;
5516
5517 if (symndx < symtab_hdr->sh_info)
5518 {
5519 Elf_Internal_Sym *sym;
5520
5521 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5522 if (sym == NULL)
5523 {
5524 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5525 symtab_hdr->sh_info,
5526 0, NULL, NULL, NULL);
5527 if (sym == NULL)
5528 break;
5529 symtab_hdr->contents = (bfd_byte *) sym;
5530 }
5531
5532 sym += symndx;
5533 val = sym->st_value;
5534 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5535 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5536 }
5537 else
5538 {
5539 struct elf_link_hash_entry **sym_hashes;
5540 struct elf_link_hash_entry *rh;
5541
5542 sym_hashes = elf_sym_hashes (opd_bfd);
5543 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5544 rh = elf_follow_link (rh);
5545 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5546 || rh->root.type == bfd_link_hash_defweak);
5547 val = rh->root.u.def.value;
5548 sec = rh->root.u.def.section;
5549 }
5550 val += look->r_addend;
5551 if (code_off != NULL)
5552 *code_off = val;
5553 if (code_sec != NULL)
5554 *code_sec = sec;
5555 if (sec != NULL && sec->output_section != NULL)
5556 val += sec->output_section->vma + sec->output_offset;
5557 }
5558 break;
5559 }
5560 }
5561
5562 return val;
5563 }
5564
5565 /* Return true if symbol is defined in a regular object file. */
5566
5567 static bfd_boolean
5568 is_static_defined (struct elf_link_hash_entry *h)
5569 {
5570 return ((h->root.type == bfd_link_hash_defined
5571 || h->root.type == bfd_link_hash_defweak)
5572 && h->root.u.def.section != NULL
5573 && h->root.u.def.section->output_section != NULL);
5574 }
5575
5576 /* If FDH is a function descriptor symbol, return the associated code
5577 entry symbol if it is defined. Return NULL otherwise. */
5578
5579 static struct ppc_link_hash_entry *
5580 defined_code_entry (struct ppc_link_hash_entry *fdh)
5581 {
5582 if (fdh->is_func_descriptor)
5583 {
5584 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5585 if (fh->elf.root.type == bfd_link_hash_defined
5586 || fh->elf.root.type == bfd_link_hash_defweak)
5587 return fh;
5588 }
5589 return NULL;
5590 }
5591
5592 /* If FH is a function code entry symbol, return the associated
5593 function descriptor symbol if it is defined. Return NULL otherwise. */
5594
5595 static struct ppc_link_hash_entry *
5596 defined_func_desc (struct ppc_link_hash_entry *fh)
5597 {
5598 if (fh->oh != NULL
5599 && fh->oh->is_func_descriptor)
5600 {
5601 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5602 if (fdh->elf.root.type == bfd_link_hash_defined
5603 || fdh->elf.root.type == bfd_link_hash_defweak)
5604 return fdh;
5605 }
5606 return NULL;
5607 }
5608
5609 /* Mark all our entry sym sections, both opd and code section. */
5610
5611 static void
5612 ppc64_elf_gc_keep (struct bfd_link_info *info)
5613 {
5614 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5615 struct bfd_sym_chain *sym;
5616
5617 if (htab == NULL)
5618 return;
5619
5620 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5621 {
5622 struct ppc_link_hash_entry *eh, *fh;
5623 asection *sec;
5624
5625 eh = (struct ppc_link_hash_entry *)
5626 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5627 if (eh == NULL)
5628 continue;
5629 if (eh->elf.root.type != bfd_link_hash_defined
5630 && eh->elf.root.type != bfd_link_hash_defweak)
5631 continue;
5632
5633 fh = defined_code_entry (eh);
5634 if (fh != NULL)
5635 {
5636 sec = fh->elf.root.u.def.section;
5637 sec->flags |= SEC_KEEP;
5638 }
5639 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5640 && opd_entry_value (eh->elf.root.u.def.section,
5641 eh->elf.root.u.def.value,
5642 &sec, NULL) != (bfd_vma) -1)
5643 sec->flags |= SEC_KEEP;
5644
5645 sec = eh->elf.root.u.def.section;
5646 sec->flags |= SEC_KEEP;
5647 }
5648 }
5649
5650 /* Mark sections containing dynamically referenced symbols. When
5651 building shared libraries, we must assume that any visible symbol is
5652 referenced. */
5653
5654 static bfd_boolean
5655 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5656 {
5657 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5658 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5659 struct ppc_link_hash_entry *fdh;
5660
5661 if (eh->elf.root.type == bfd_link_hash_warning)
5662 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5663
5664 /* Dynamic linking info is on the func descriptor sym. */
5665 fdh = defined_func_desc (eh);
5666 if (fdh != NULL)
5667 eh = fdh;
5668
5669 if ((eh->elf.root.type == bfd_link_hash_defined
5670 || eh->elf.root.type == bfd_link_hash_defweak)
5671 && (eh->elf.ref_dynamic
5672 || (!info->executable
5673 && eh->elf.def_regular
5674 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5675 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5676 {
5677 asection *code_sec;
5678 struct ppc_link_hash_entry *fh;
5679
5680 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5681
5682 /* Function descriptor syms cause the associated
5683 function code sym section to be marked. */
5684 fh = defined_code_entry (eh);
5685 if (fh != NULL)
5686 {
5687 code_sec = fh->elf.root.u.def.section;
5688 code_sec->flags |= SEC_KEEP;
5689 }
5690 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5691 && opd_entry_value (eh->elf.root.u.def.section,
5692 eh->elf.root.u.def.value,
5693 &code_sec, NULL) != (bfd_vma) -1)
5694 code_sec->flags |= SEC_KEEP;
5695 }
5696
5697 return TRUE;
5698 }
5699
5700 /* Return the section that should be marked against GC for a given
5701 relocation. */
5702
5703 static asection *
5704 ppc64_elf_gc_mark_hook (asection *sec,
5705 struct bfd_link_info *info,
5706 Elf_Internal_Rela *rel,
5707 struct elf_link_hash_entry *h,
5708 Elf_Internal_Sym *sym)
5709 {
5710 asection *rsec;
5711
5712 /* Syms return NULL if we're marking .opd, so we avoid marking all
5713 function sections, as all functions are referenced in .opd. */
5714 rsec = NULL;
5715 if (get_opd_info (sec) != NULL)
5716 return rsec;
5717
5718 if (h != NULL)
5719 {
5720 enum elf_ppc64_reloc_type r_type;
5721 struct ppc_link_hash_entry *eh, *fh, *fdh;
5722
5723 r_type = ELF64_R_TYPE (rel->r_info);
5724 switch (r_type)
5725 {
5726 case R_PPC64_GNU_VTINHERIT:
5727 case R_PPC64_GNU_VTENTRY:
5728 break;
5729
5730 default:
5731 switch (h->root.type)
5732 {
5733 case bfd_link_hash_defined:
5734 case bfd_link_hash_defweak:
5735 eh = (struct ppc_link_hash_entry *) h;
5736 fdh = defined_func_desc (eh);
5737 if (fdh != NULL)
5738 eh = fdh;
5739
5740 /* Function descriptor syms cause the associated
5741 function code sym section to be marked. */
5742 fh = defined_code_entry (eh);
5743 if (fh != NULL)
5744 {
5745 /* They also mark their opd section. */
5746 eh->elf.root.u.def.section->gc_mark = 1;
5747
5748 rsec = fh->elf.root.u.def.section;
5749 }
5750 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5751 && opd_entry_value (eh->elf.root.u.def.section,
5752 eh->elf.root.u.def.value,
5753 &rsec, NULL) != (bfd_vma) -1)
5754 eh->elf.root.u.def.section->gc_mark = 1;
5755 else
5756 rsec = h->root.u.def.section;
5757 break;
5758
5759 case bfd_link_hash_common:
5760 rsec = h->root.u.c.p->section;
5761 break;
5762
5763 default:
5764 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5765 }
5766 }
5767 }
5768 else
5769 {
5770 struct _opd_sec_data *opd;
5771
5772 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5773 opd = get_opd_info (rsec);
5774 if (opd != NULL && opd->func_sec != NULL)
5775 {
5776 rsec->gc_mark = 1;
5777
5778 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5779 }
5780 }
5781
5782 return rsec;
5783 }
5784
5785 /* Update the .got, .plt. and dynamic reloc reference counts for the
5786 section being removed. */
5787
5788 static bfd_boolean
5789 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5790 asection *sec, const Elf_Internal_Rela *relocs)
5791 {
5792 struct ppc_link_hash_table *htab;
5793 Elf_Internal_Shdr *symtab_hdr;
5794 struct elf_link_hash_entry **sym_hashes;
5795 struct got_entry **local_got_ents;
5796 const Elf_Internal_Rela *rel, *relend;
5797
5798 if (info->relocatable)
5799 return TRUE;
5800
5801 if ((sec->flags & SEC_ALLOC) == 0)
5802 return TRUE;
5803
5804 elf_section_data (sec)->local_dynrel = NULL;
5805
5806 htab = ppc_hash_table (info);
5807 if (htab == NULL)
5808 return FALSE;
5809
5810 symtab_hdr = &elf_symtab_hdr (abfd);
5811 sym_hashes = elf_sym_hashes (abfd);
5812 local_got_ents = elf_local_got_ents (abfd);
5813
5814 relend = relocs + sec->reloc_count;
5815 for (rel = relocs; rel < relend; rel++)
5816 {
5817 unsigned long r_symndx;
5818 enum elf_ppc64_reloc_type r_type;
5819 struct elf_link_hash_entry *h = NULL;
5820 unsigned char tls_type = 0;
5821
5822 r_symndx = ELF64_R_SYM (rel->r_info);
5823 r_type = ELF64_R_TYPE (rel->r_info);
5824 if (r_symndx >= symtab_hdr->sh_info)
5825 {
5826 struct ppc_link_hash_entry *eh;
5827 struct ppc_dyn_relocs **pp;
5828 struct ppc_dyn_relocs *p;
5829
5830 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5831 h = elf_follow_link (h);
5832 eh = (struct ppc_link_hash_entry *) h;
5833
5834 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5835 if (p->sec == sec)
5836 {
5837 /* Everything must go for SEC. */
5838 *pp = p->next;
5839 break;
5840 }
5841 }
5842
5843 if (is_branch_reloc (r_type))
5844 {
5845 struct plt_entry **ifunc = NULL;
5846 if (h != NULL)
5847 {
5848 if (h->type == STT_GNU_IFUNC)
5849 ifunc = &h->plt.plist;
5850 }
5851 else if (local_got_ents != NULL)
5852 {
5853 struct plt_entry **local_plt = (struct plt_entry **)
5854 (local_got_ents + symtab_hdr->sh_info);
5855 unsigned char *local_got_tls_masks = (unsigned char *)
5856 (local_plt + symtab_hdr->sh_info);
5857 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5858 ifunc = local_plt + r_symndx;
5859 }
5860 if (ifunc != NULL)
5861 {
5862 struct plt_entry *ent;
5863
5864 for (ent = *ifunc; ent != NULL; ent = ent->next)
5865 if (ent->addend == rel->r_addend)
5866 break;
5867 if (ent == NULL)
5868 abort ();
5869 if (ent->plt.refcount > 0)
5870 ent->plt.refcount -= 1;
5871 continue;
5872 }
5873 }
5874
5875 switch (r_type)
5876 {
5877 case R_PPC64_GOT_TLSLD16:
5878 case R_PPC64_GOT_TLSLD16_LO:
5879 case R_PPC64_GOT_TLSLD16_HI:
5880 case R_PPC64_GOT_TLSLD16_HA:
5881 tls_type = TLS_TLS | TLS_LD;
5882 goto dogot;
5883
5884 case R_PPC64_GOT_TLSGD16:
5885 case R_PPC64_GOT_TLSGD16_LO:
5886 case R_PPC64_GOT_TLSGD16_HI:
5887 case R_PPC64_GOT_TLSGD16_HA:
5888 tls_type = TLS_TLS | TLS_GD;
5889 goto dogot;
5890
5891 case R_PPC64_GOT_TPREL16_DS:
5892 case R_PPC64_GOT_TPREL16_LO_DS:
5893 case R_PPC64_GOT_TPREL16_HI:
5894 case R_PPC64_GOT_TPREL16_HA:
5895 tls_type = TLS_TLS | TLS_TPREL;
5896 goto dogot;
5897
5898 case R_PPC64_GOT_DTPREL16_DS:
5899 case R_PPC64_GOT_DTPREL16_LO_DS:
5900 case R_PPC64_GOT_DTPREL16_HI:
5901 case R_PPC64_GOT_DTPREL16_HA:
5902 tls_type = TLS_TLS | TLS_DTPREL;
5903 goto dogot;
5904
5905 case R_PPC64_GOT16:
5906 case R_PPC64_GOT16_DS:
5907 case R_PPC64_GOT16_HA:
5908 case R_PPC64_GOT16_HI:
5909 case R_PPC64_GOT16_LO:
5910 case R_PPC64_GOT16_LO_DS:
5911 dogot:
5912 {
5913 struct got_entry *ent;
5914
5915 if (h != NULL)
5916 ent = h->got.glist;
5917 else
5918 ent = local_got_ents[r_symndx];
5919
5920 for (; ent != NULL; ent = ent->next)
5921 if (ent->addend == rel->r_addend
5922 && ent->owner == abfd
5923 && ent->tls_type == tls_type)
5924 break;
5925 if (ent == NULL)
5926 abort ();
5927 if (ent->got.refcount > 0)
5928 ent->got.refcount -= 1;
5929 }
5930 break;
5931
5932 case R_PPC64_PLT16_HA:
5933 case R_PPC64_PLT16_HI:
5934 case R_PPC64_PLT16_LO:
5935 case R_PPC64_PLT32:
5936 case R_PPC64_PLT64:
5937 case R_PPC64_REL14:
5938 case R_PPC64_REL14_BRNTAKEN:
5939 case R_PPC64_REL14_BRTAKEN:
5940 case R_PPC64_REL24:
5941 if (h != NULL)
5942 {
5943 struct plt_entry *ent;
5944
5945 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5946 if (ent->addend == rel->r_addend)
5947 break;
5948 if (ent != NULL && ent->plt.refcount > 0)
5949 ent->plt.refcount -= 1;
5950 }
5951 break;
5952
5953 default:
5954 break;
5955 }
5956 }
5957 return TRUE;
5958 }
5959
5960 /* The maximum size of .sfpr. */
5961 #define SFPR_MAX (218*4)
5962
5963 struct sfpr_def_parms
5964 {
5965 const char name[12];
5966 unsigned char lo, hi;
5967 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5968 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5969 };
5970
5971 /* Auto-generate _save*, _rest* functions in .sfpr. */
5972
5973 static bfd_boolean
5974 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5975 {
5976 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5977 unsigned int i;
5978 size_t len = strlen (parm->name);
5979 bfd_boolean writing = FALSE;
5980 char sym[16];
5981
5982 if (htab == NULL)
5983 return FALSE;
5984
5985 memcpy (sym, parm->name, len);
5986 sym[len + 2] = 0;
5987
5988 for (i = parm->lo; i <= parm->hi; i++)
5989 {
5990 struct elf_link_hash_entry *h;
5991
5992 sym[len + 0] = i / 10 + '0';
5993 sym[len + 1] = i % 10 + '0';
5994 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5995 if (h != NULL
5996 && !h->def_regular)
5997 {
5998 h->root.type = bfd_link_hash_defined;
5999 h->root.u.def.section = htab->sfpr;
6000 h->root.u.def.value = htab->sfpr->size;
6001 h->type = STT_FUNC;
6002 h->def_regular = 1;
6003 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6004 writing = TRUE;
6005 if (htab->sfpr->contents == NULL)
6006 {
6007 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6008 if (htab->sfpr->contents == NULL)
6009 return FALSE;
6010 }
6011 }
6012 if (writing)
6013 {
6014 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6015 if (i != parm->hi)
6016 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6017 else
6018 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6019 htab->sfpr->size = p - htab->sfpr->contents;
6020 }
6021 }
6022
6023 return TRUE;
6024 }
6025
6026 static bfd_byte *
6027 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6028 {
6029 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6030 return p + 4;
6031 }
6032
6033 static bfd_byte *
6034 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6035 {
6036 p = savegpr0 (abfd, p, r);
6037 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6038 p = p + 4;
6039 bfd_put_32 (abfd, BLR, p);
6040 return p + 4;
6041 }
6042
6043 static bfd_byte *
6044 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6045 {
6046 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6047 return p + 4;
6048 }
6049
6050 static bfd_byte *
6051 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6052 {
6053 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6054 p = p + 4;
6055 p = restgpr0 (abfd, p, r);
6056 bfd_put_32 (abfd, MTLR_R0, p);
6057 p = p + 4;
6058 if (r == 29)
6059 {
6060 p = restgpr0 (abfd, p, 30);
6061 p = restgpr0 (abfd, p, 31);
6062 }
6063 bfd_put_32 (abfd, BLR, p);
6064 return p + 4;
6065 }
6066
6067 static bfd_byte *
6068 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6069 {
6070 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6071 return p + 4;
6072 }
6073
6074 static bfd_byte *
6075 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6076 {
6077 p = savegpr1 (abfd, p, r);
6078 bfd_put_32 (abfd, BLR, p);
6079 return p + 4;
6080 }
6081
6082 static bfd_byte *
6083 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6084 {
6085 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6086 return p + 4;
6087 }
6088
6089 static bfd_byte *
6090 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6091 {
6092 p = restgpr1 (abfd, p, r);
6093 bfd_put_32 (abfd, BLR, p);
6094 return p + 4;
6095 }
6096
6097 static bfd_byte *
6098 savefpr (bfd *abfd, bfd_byte *p, int r)
6099 {
6100 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6101 return p + 4;
6102 }
6103
6104 static bfd_byte *
6105 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6106 {
6107 p = savefpr (abfd, p, r);
6108 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6109 p = p + 4;
6110 bfd_put_32 (abfd, BLR, p);
6111 return p + 4;
6112 }
6113
6114 static bfd_byte *
6115 restfpr (bfd *abfd, bfd_byte *p, int r)
6116 {
6117 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6118 return p + 4;
6119 }
6120
6121 static bfd_byte *
6122 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6123 {
6124 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6125 p = p + 4;
6126 p = restfpr (abfd, p, r);
6127 bfd_put_32 (abfd, MTLR_R0, p);
6128 p = p + 4;
6129 if (r == 29)
6130 {
6131 p = restfpr (abfd, p, 30);
6132 p = restfpr (abfd, p, 31);
6133 }
6134 bfd_put_32 (abfd, BLR, p);
6135 return p + 4;
6136 }
6137
6138 static bfd_byte *
6139 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6140 {
6141 p = savefpr (abfd, p, r);
6142 bfd_put_32 (abfd, BLR, p);
6143 return p + 4;
6144 }
6145
6146 static bfd_byte *
6147 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6148 {
6149 p = restfpr (abfd, p, r);
6150 bfd_put_32 (abfd, BLR, p);
6151 return p + 4;
6152 }
6153
6154 static bfd_byte *
6155 savevr (bfd *abfd, bfd_byte *p, int r)
6156 {
6157 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6158 p = p + 4;
6159 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6160 return p + 4;
6161 }
6162
6163 static bfd_byte *
6164 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6165 {
6166 p = savevr (abfd, p, r);
6167 bfd_put_32 (abfd, BLR, p);
6168 return p + 4;
6169 }
6170
6171 static bfd_byte *
6172 restvr (bfd *abfd, bfd_byte *p, int r)
6173 {
6174 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6175 p = p + 4;
6176 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6177 return p + 4;
6178 }
6179
6180 static bfd_byte *
6181 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6182 {
6183 p = restvr (abfd, p, r);
6184 bfd_put_32 (abfd, BLR, p);
6185 return p + 4;
6186 }
6187
6188 /* Called via elf_link_hash_traverse to transfer dynamic linking
6189 information on function code symbol entries to their corresponding
6190 function descriptor symbol entries. */
6191
6192 static bfd_boolean
6193 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6194 {
6195 struct bfd_link_info *info;
6196 struct ppc_link_hash_table *htab;
6197 struct plt_entry *ent;
6198 struct ppc_link_hash_entry *fh;
6199 struct ppc_link_hash_entry *fdh;
6200 bfd_boolean force_local;
6201
6202 fh = (struct ppc_link_hash_entry *) h;
6203 if (fh->elf.root.type == bfd_link_hash_indirect)
6204 return TRUE;
6205
6206 if (fh->elf.root.type == bfd_link_hash_warning)
6207 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6208
6209 info = inf;
6210 htab = ppc_hash_table (info);
6211 if (htab == NULL)
6212 return FALSE;
6213
6214 /* Resolve undefined references to dot-symbols as the value
6215 in the function descriptor, if we have one in a regular object.
6216 This is to satisfy cases like ".quad .foo". Calls to functions
6217 in dynamic objects are handled elsewhere. */
6218 if (fh->elf.root.type == bfd_link_hash_undefweak
6219 && fh->was_undefined
6220 && (fdh = defined_func_desc (fh)) != NULL
6221 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6222 && opd_entry_value (fdh->elf.root.u.def.section,
6223 fdh->elf.root.u.def.value,
6224 &fh->elf.root.u.def.section,
6225 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6226 {
6227 fh->elf.root.type = fdh->elf.root.type;
6228 fh->elf.forced_local = 1;
6229 fh->elf.def_regular = fdh->elf.def_regular;
6230 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6231 }
6232
6233 /* If this is a function code symbol, transfer dynamic linking
6234 information to the function descriptor symbol. */
6235 if (!fh->is_func)
6236 return TRUE;
6237
6238 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6239 if (ent->plt.refcount > 0)
6240 break;
6241 if (ent == NULL
6242 || fh->elf.root.root.string[0] != '.'
6243 || fh->elf.root.root.string[1] == '\0')
6244 return TRUE;
6245
6246 /* Find the corresponding function descriptor symbol. Create it
6247 as undefined if necessary. */
6248
6249 fdh = lookup_fdh (fh, htab);
6250 if (fdh == NULL
6251 && !info->executable
6252 && (fh->elf.root.type == bfd_link_hash_undefined
6253 || fh->elf.root.type == bfd_link_hash_undefweak))
6254 {
6255 fdh = make_fdh (info, fh);
6256 if (fdh == NULL)
6257 return FALSE;
6258 }
6259
6260 /* Fake function descriptors are made undefweak. If the function
6261 code symbol is strong undefined, make the fake sym the same.
6262 If the function code symbol is defined, then force the fake
6263 descriptor local; We can't support overriding of symbols in a
6264 shared library on a fake descriptor. */
6265
6266 if (fdh != NULL
6267 && fdh->fake
6268 && fdh->elf.root.type == bfd_link_hash_undefweak)
6269 {
6270 if (fh->elf.root.type == bfd_link_hash_undefined)
6271 {
6272 fdh->elf.root.type = bfd_link_hash_undefined;
6273 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6274 }
6275 else if (fh->elf.root.type == bfd_link_hash_defined
6276 || fh->elf.root.type == bfd_link_hash_defweak)
6277 {
6278 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6279 }
6280 }
6281
6282 if (fdh != NULL
6283 && !fdh->elf.forced_local
6284 && (!info->executable
6285 || fdh->elf.def_dynamic
6286 || fdh->elf.ref_dynamic
6287 || (fdh->elf.root.type == bfd_link_hash_undefweak
6288 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6289 {
6290 if (fdh->elf.dynindx == -1)
6291 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6292 return FALSE;
6293 fdh->elf.ref_regular |= fh->elf.ref_regular;
6294 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6295 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6296 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6297 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6298 {
6299 move_plt_plist (fh, fdh);
6300 fdh->elf.needs_plt = 1;
6301 }
6302 fdh->is_func_descriptor = 1;
6303 fdh->oh = fh;
6304 fh->oh = fdh;
6305 }
6306
6307 /* Now that the info is on the function descriptor, clear the
6308 function code sym info. Any function code syms for which we
6309 don't have a definition in a regular file, we force local.
6310 This prevents a shared library from exporting syms that have
6311 been imported from another library. Function code syms that
6312 are really in the library we must leave global to prevent the
6313 linker dragging in a definition from a static library. */
6314 force_local = (!fh->elf.def_regular
6315 || fdh == NULL
6316 || !fdh->elf.def_regular
6317 || fdh->elf.forced_local);
6318 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6319
6320 return TRUE;
6321 }
6322
6323 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6324 this hook to a) provide some gcc support functions, and b) transfer
6325 dynamic linking information gathered so far on function code symbol
6326 entries, to their corresponding function descriptor symbol entries. */
6327
6328 static bfd_boolean
6329 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6330 struct bfd_link_info *info)
6331 {
6332 struct ppc_link_hash_table *htab;
6333 unsigned int i;
6334 const struct sfpr_def_parms funcs[] =
6335 {
6336 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6337 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6338 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6339 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6340 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6341 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6342 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6343 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6344 { "._savef", 14, 31, savefpr, savefpr1_tail },
6345 { "._restf", 14, 31, restfpr, restfpr1_tail },
6346 { "_savevr_", 20, 31, savevr, savevr_tail },
6347 { "_restvr_", 20, 31, restvr, restvr_tail }
6348 };
6349
6350 htab = ppc_hash_table (info);
6351 if (htab == NULL)
6352 return FALSE;
6353
6354 if (htab->sfpr == NULL)
6355 /* We don't have any relocs. */
6356 return TRUE;
6357
6358 /* Provide any missing _save* and _rest* functions. */
6359 htab->sfpr->size = 0;
6360 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6361 if (!sfpr_define (info, &funcs[i]))
6362 return FALSE;
6363
6364 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6365
6366 if (htab->sfpr->size == 0)
6367 htab->sfpr->flags |= SEC_EXCLUDE;
6368
6369 return TRUE;
6370 }
6371
6372 /* Adjust a symbol defined by a dynamic object and referenced by a
6373 regular object. The current definition is in some section of the
6374 dynamic object, but we're not including those sections. We have to
6375 change the definition to something the rest of the link can
6376 understand. */
6377
6378 static bfd_boolean
6379 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6380 struct elf_link_hash_entry *h)
6381 {
6382 struct ppc_link_hash_table *htab;
6383 asection *s;
6384
6385 htab = ppc_hash_table (info);
6386 if (htab == NULL)
6387 return FALSE;
6388
6389 /* Deal with function syms. */
6390 if (h->type == STT_FUNC
6391 || h->type == STT_GNU_IFUNC
6392 || h->needs_plt)
6393 {
6394 /* Clear procedure linkage table information for any symbol that
6395 won't need a .plt entry. */
6396 struct plt_entry *ent;
6397 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6398 if (ent->plt.refcount > 0)
6399 break;
6400 if (ent == NULL
6401 || (h->type != STT_GNU_IFUNC
6402 && (SYMBOL_CALLS_LOCAL (info, h)
6403 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6404 && h->root.type == bfd_link_hash_undefweak))))
6405 {
6406 h->plt.plist = NULL;
6407 h->needs_plt = 0;
6408 }
6409 }
6410 else
6411 h->plt.plist = NULL;
6412
6413 /* If this is a weak symbol, and there is a real definition, the
6414 processor independent code will have arranged for us to see the
6415 real definition first, and we can just use the same value. */
6416 if (h->u.weakdef != NULL)
6417 {
6418 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6419 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6420 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6421 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6422 if (ELIMINATE_COPY_RELOCS)
6423 h->non_got_ref = h->u.weakdef->non_got_ref;
6424 return TRUE;
6425 }
6426
6427 /* If we are creating a shared library, we must presume that the
6428 only references to the symbol are via the global offset table.
6429 For such cases we need not do anything here; the relocations will
6430 be handled correctly by relocate_section. */
6431 if (info->shared)
6432 return TRUE;
6433
6434 /* If there are no references to this symbol that do not use the
6435 GOT, we don't need to generate a copy reloc. */
6436 if (!h->non_got_ref)
6437 return TRUE;
6438
6439 /* Don't generate a copy reloc for symbols defined in the executable. */
6440 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6441 return TRUE;
6442
6443 if (ELIMINATE_COPY_RELOCS)
6444 {
6445 struct ppc_link_hash_entry * eh;
6446 struct ppc_dyn_relocs *p;
6447
6448 eh = (struct ppc_link_hash_entry *) h;
6449 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6450 {
6451 s = p->sec->output_section;
6452 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6453 break;
6454 }
6455
6456 /* If we didn't find any dynamic relocs in read-only sections, then
6457 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6458 if (p == NULL)
6459 {
6460 h->non_got_ref = 0;
6461 return TRUE;
6462 }
6463 }
6464
6465 if (h->plt.plist != NULL)
6466 {
6467 /* We should never get here, but unfortunately there are versions
6468 of gcc out there that improperly (for this ABI) put initialized
6469 function pointers, vtable refs and suchlike in read-only
6470 sections. Allow them to proceed, but warn that this might
6471 break at runtime. */
6472 (*_bfd_error_handler)
6473 (_("copy reloc against `%s' requires lazy plt linking; "
6474 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6475 h->root.root.string);
6476 }
6477
6478 /* This is a reference to a symbol defined by a dynamic object which
6479 is not a function. */
6480
6481 if (h->size == 0)
6482 {
6483 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6484 h->root.root.string);
6485 return TRUE;
6486 }
6487
6488 /* We must allocate the symbol in our .dynbss section, which will
6489 become part of the .bss section of the executable. There will be
6490 an entry for this symbol in the .dynsym section. The dynamic
6491 object will contain position independent code, so all references
6492 from the dynamic object to this symbol will go through the global
6493 offset table. The dynamic linker will use the .dynsym entry to
6494 determine the address it must put in the global offset table, so
6495 both the dynamic object and the regular object will refer to the
6496 same memory location for the variable. */
6497
6498 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6499 to copy the initial value out of the dynamic object and into the
6500 runtime process image. We need to remember the offset into the
6501 .rela.bss section we are going to use. */
6502 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6503 {
6504 htab->relbss->size += sizeof (Elf64_External_Rela);
6505 h->needs_copy = 1;
6506 }
6507
6508 s = htab->dynbss;
6509
6510 return _bfd_elf_adjust_dynamic_copy (h, s);
6511 }
6512
6513 /* If given a function descriptor symbol, hide both the function code
6514 sym and the descriptor. */
6515 static void
6516 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6517 struct elf_link_hash_entry *h,
6518 bfd_boolean force_local)
6519 {
6520 struct ppc_link_hash_entry *eh;
6521 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6522
6523 eh = (struct ppc_link_hash_entry *) h;
6524 if (eh->is_func_descriptor)
6525 {
6526 struct ppc_link_hash_entry *fh = eh->oh;
6527
6528 if (fh == NULL)
6529 {
6530 const char *p, *q;
6531 struct ppc_link_hash_table *htab;
6532 char save;
6533
6534 /* We aren't supposed to use alloca in BFD because on
6535 systems which do not have alloca the version in libiberty
6536 calls xmalloc, which might cause the program to crash
6537 when it runs out of memory. This function doesn't have a
6538 return status, so there's no way to gracefully return an
6539 error. So cheat. We know that string[-1] can be safely
6540 accessed; It's either a string in an ELF string table,
6541 or allocated in an objalloc structure. */
6542
6543 p = eh->elf.root.root.string - 1;
6544 save = *p;
6545 *(char *) p = '.';
6546 htab = ppc_hash_table (info);
6547 if (htab == NULL)
6548 return;
6549
6550 fh = (struct ppc_link_hash_entry *)
6551 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6552 *(char *) p = save;
6553
6554 /* Unfortunately, if it so happens that the string we were
6555 looking for was allocated immediately before this string,
6556 then we overwrote the string terminator. That's the only
6557 reason the lookup should fail. */
6558 if (fh == NULL)
6559 {
6560 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6561 while (q >= eh->elf.root.root.string && *q == *p)
6562 --q, --p;
6563 if (q < eh->elf.root.root.string && *p == '.')
6564 fh = (struct ppc_link_hash_entry *)
6565 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6566 }
6567 if (fh != NULL)
6568 {
6569 eh->oh = fh;
6570 fh->oh = eh;
6571 }
6572 }
6573 if (fh != NULL)
6574 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6575 }
6576 }
6577
6578 static bfd_boolean
6579 get_sym_h (struct elf_link_hash_entry **hp,
6580 Elf_Internal_Sym **symp,
6581 asection **symsecp,
6582 unsigned char **tls_maskp,
6583 Elf_Internal_Sym **locsymsp,
6584 unsigned long r_symndx,
6585 bfd *ibfd)
6586 {
6587 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6588
6589 if (r_symndx >= symtab_hdr->sh_info)
6590 {
6591 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6592 struct elf_link_hash_entry *h;
6593
6594 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6595 h = elf_follow_link (h);
6596
6597 if (hp != NULL)
6598 *hp = h;
6599
6600 if (symp != NULL)
6601 *symp = NULL;
6602
6603 if (symsecp != NULL)
6604 {
6605 asection *symsec = NULL;
6606 if (h->root.type == bfd_link_hash_defined
6607 || h->root.type == bfd_link_hash_defweak)
6608 symsec = h->root.u.def.section;
6609 *symsecp = symsec;
6610 }
6611
6612 if (tls_maskp != NULL)
6613 {
6614 struct ppc_link_hash_entry *eh;
6615
6616 eh = (struct ppc_link_hash_entry *) h;
6617 *tls_maskp = &eh->tls_mask;
6618 }
6619 }
6620 else
6621 {
6622 Elf_Internal_Sym *sym;
6623 Elf_Internal_Sym *locsyms = *locsymsp;
6624
6625 if (locsyms == NULL)
6626 {
6627 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6628 if (locsyms == NULL)
6629 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6630 symtab_hdr->sh_info,
6631 0, NULL, NULL, NULL);
6632 if (locsyms == NULL)
6633 return FALSE;
6634 *locsymsp = locsyms;
6635 }
6636 sym = locsyms + r_symndx;
6637
6638 if (hp != NULL)
6639 *hp = NULL;
6640
6641 if (symp != NULL)
6642 *symp = sym;
6643
6644 if (symsecp != NULL)
6645 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6646
6647 if (tls_maskp != NULL)
6648 {
6649 struct got_entry **lgot_ents;
6650 unsigned char *tls_mask;
6651
6652 tls_mask = NULL;
6653 lgot_ents = elf_local_got_ents (ibfd);
6654 if (lgot_ents != NULL)
6655 {
6656 struct plt_entry **local_plt = (struct plt_entry **)
6657 (lgot_ents + symtab_hdr->sh_info);
6658 unsigned char *lgot_masks = (unsigned char *)
6659 (local_plt + symtab_hdr->sh_info);
6660 tls_mask = &lgot_masks[r_symndx];
6661 }
6662 *tls_maskp = tls_mask;
6663 }
6664 }
6665 return TRUE;
6666 }
6667
6668 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6669 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6670 type suitable for optimization, and 1 otherwise. */
6671
6672 static int
6673 get_tls_mask (unsigned char **tls_maskp,
6674 unsigned long *toc_symndx,
6675 bfd_vma *toc_addend,
6676 Elf_Internal_Sym **locsymsp,
6677 const Elf_Internal_Rela *rel,
6678 bfd *ibfd)
6679 {
6680 unsigned long r_symndx;
6681 int next_r;
6682 struct elf_link_hash_entry *h;
6683 Elf_Internal_Sym *sym;
6684 asection *sec;
6685 bfd_vma off;
6686
6687 r_symndx = ELF64_R_SYM (rel->r_info);
6688 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6689 return 0;
6690
6691 if ((*tls_maskp != NULL && **tls_maskp != 0)
6692 || sec == NULL
6693 || ppc64_elf_section_data (sec) == NULL
6694 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6695 return 1;
6696
6697 /* Look inside a TOC section too. */
6698 if (h != NULL)
6699 {
6700 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6701 off = h->root.u.def.value;
6702 }
6703 else
6704 off = sym->st_value;
6705 off += rel->r_addend;
6706 BFD_ASSERT (off % 8 == 0);
6707 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6708 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6709 if (toc_symndx != NULL)
6710 *toc_symndx = r_symndx;
6711 if (toc_addend != NULL)
6712 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6713 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6714 return 0;
6715 if ((h == NULL || is_static_defined (h))
6716 && (next_r == -1 || next_r == -2))
6717 return 1 - next_r;
6718 return 1;
6719 }
6720
6721 /* Adjust all global syms defined in opd sections. In gcc generated
6722 code for the old ABI, these will already have been done. */
6723
6724 static bfd_boolean
6725 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6726 {
6727 struct ppc_link_hash_entry *eh;
6728 asection *sym_sec;
6729 struct _opd_sec_data *opd;
6730
6731 if (h->root.type == bfd_link_hash_indirect)
6732 return TRUE;
6733
6734 if (h->root.type == bfd_link_hash_warning)
6735 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6736
6737 if (h->root.type != bfd_link_hash_defined
6738 && h->root.type != bfd_link_hash_defweak)
6739 return TRUE;
6740
6741 eh = (struct ppc_link_hash_entry *) h;
6742 if (eh->adjust_done)
6743 return TRUE;
6744
6745 sym_sec = eh->elf.root.u.def.section;
6746 opd = get_opd_info (sym_sec);
6747 if (opd != NULL && opd->adjust != NULL)
6748 {
6749 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6750 if (adjust == -1)
6751 {
6752 /* This entry has been deleted. */
6753 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6754 if (dsec == NULL)
6755 {
6756 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6757 if (elf_discarded_section (dsec))
6758 {
6759 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6760 break;
6761 }
6762 }
6763 eh->elf.root.u.def.value = 0;
6764 eh->elf.root.u.def.section = dsec;
6765 }
6766 else
6767 eh->elf.root.u.def.value += adjust;
6768 eh->adjust_done = 1;
6769 }
6770 return TRUE;
6771 }
6772
6773 /* Handles decrementing dynamic reloc counts for the reloc specified by
6774 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6775 have already been determined. */
6776
6777 static bfd_boolean
6778 dec_dynrel_count (bfd_vma r_info,
6779 asection *sec,
6780 struct bfd_link_info *info,
6781 Elf_Internal_Sym **local_syms,
6782 struct elf_link_hash_entry *h,
6783 asection *sym_sec)
6784 {
6785 enum elf_ppc64_reloc_type r_type;
6786 struct ppc_dyn_relocs *p;
6787 struct ppc_dyn_relocs **pp;
6788
6789 /* Can this reloc be dynamic? This switch, and later tests here
6790 should be kept in sync with the code in check_relocs. */
6791 r_type = ELF64_R_TYPE (r_info);
6792 switch (r_type)
6793 {
6794 default:
6795 return TRUE;
6796
6797 case R_PPC64_TPREL16:
6798 case R_PPC64_TPREL16_LO:
6799 case R_PPC64_TPREL16_HI:
6800 case R_PPC64_TPREL16_HA:
6801 case R_PPC64_TPREL16_DS:
6802 case R_PPC64_TPREL16_LO_DS:
6803 case R_PPC64_TPREL16_HIGHER:
6804 case R_PPC64_TPREL16_HIGHERA:
6805 case R_PPC64_TPREL16_HIGHEST:
6806 case R_PPC64_TPREL16_HIGHESTA:
6807 if (!info->shared)
6808 return TRUE;
6809
6810 case R_PPC64_TPREL64:
6811 case R_PPC64_DTPMOD64:
6812 case R_PPC64_DTPREL64:
6813 case R_PPC64_ADDR64:
6814 case R_PPC64_REL30:
6815 case R_PPC64_REL32:
6816 case R_PPC64_REL64:
6817 case R_PPC64_ADDR14:
6818 case R_PPC64_ADDR14_BRNTAKEN:
6819 case R_PPC64_ADDR14_BRTAKEN:
6820 case R_PPC64_ADDR16:
6821 case R_PPC64_ADDR16_DS:
6822 case R_PPC64_ADDR16_HA:
6823 case R_PPC64_ADDR16_HI:
6824 case R_PPC64_ADDR16_HIGHER:
6825 case R_PPC64_ADDR16_HIGHERA:
6826 case R_PPC64_ADDR16_HIGHEST:
6827 case R_PPC64_ADDR16_HIGHESTA:
6828 case R_PPC64_ADDR16_LO:
6829 case R_PPC64_ADDR16_LO_DS:
6830 case R_PPC64_ADDR24:
6831 case R_PPC64_ADDR32:
6832 case R_PPC64_UADDR16:
6833 case R_PPC64_UADDR32:
6834 case R_PPC64_UADDR64:
6835 case R_PPC64_TOC:
6836 break;
6837 }
6838
6839 if (local_syms != NULL)
6840 {
6841 unsigned long r_symndx;
6842 Elf_Internal_Sym *sym;
6843 bfd *ibfd = sec->owner;
6844
6845 r_symndx = ELF64_R_SYM (r_info);
6846 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6847 return FALSE;
6848 }
6849
6850 if ((info->shared
6851 && (must_be_dyn_reloc (info, r_type)
6852 || (h != NULL
6853 && (!info->symbolic
6854 || h->root.type == bfd_link_hash_defweak
6855 || !h->def_regular))))
6856 || (ELIMINATE_COPY_RELOCS
6857 && !info->shared
6858 && h != NULL
6859 && (h->root.type == bfd_link_hash_defweak
6860 || !h->def_regular)))
6861 ;
6862 else
6863 return TRUE;
6864
6865 if (h != NULL)
6866 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6867 else
6868 {
6869 if (sym_sec != NULL)
6870 {
6871 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6872 pp = (struct ppc_dyn_relocs **) vpp;
6873 }
6874 else
6875 {
6876 void *vpp = &elf_section_data (sec)->local_dynrel;
6877 pp = (struct ppc_dyn_relocs **) vpp;
6878 }
6879
6880 /* elf_gc_sweep may have already removed all dyn relocs associated
6881 with local syms for a given section. Don't report a dynreloc
6882 miscount. */
6883 if (*pp == NULL)
6884 return TRUE;
6885 }
6886
6887 while ((p = *pp) != NULL)
6888 {
6889 if (p->sec == sec)
6890 {
6891 if (!must_be_dyn_reloc (info, r_type))
6892 p->pc_count -= 1;
6893 p->count -= 1;
6894 if (p->count == 0)
6895 *pp = p->next;
6896 return TRUE;
6897 }
6898 pp = &p->next;
6899 }
6900
6901 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6902 sec->owner, sec);
6903 bfd_set_error (bfd_error_bad_value);
6904 return FALSE;
6905 }
6906
6907 /* Remove unused Official Procedure Descriptor entries. Currently we
6908 only remove those associated with functions in discarded link-once
6909 sections, or weakly defined functions that have been overridden. It
6910 would be possible to remove many more entries for statically linked
6911 applications. */
6912
6913 bfd_boolean
6914 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6915 {
6916 bfd *ibfd;
6917 bfd_boolean some_edited = FALSE;
6918 asection *need_pad = NULL;
6919
6920 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6921 {
6922 asection *sec;
6923 Elf_Internal_Rela *relstart, *rel, *relend;
6924 Elf_Internal_Shdr *symtab_hdr;
6925 Elf_Internal_Sym *local_syms;
6926 bfd_vma offset;
6927 struct _opd_sec_data *opd;
6928 bfd_boolean need_edit, add_aux_fields;
6929 bfd_size_type cnt_16b = 0;
6930
6931 if (!is_ppc64_elf (ibfd))
6932 continue;
6933
6934 sec = bfd_get_section_by_name (ibfd, ".opd");
6935 if (sec == NULL || sec->size == 0)
6936 continue;
6937
6938 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6939 continue;
6940
6941 if (sec->output_section == bfd_abs_section_ptr)
6942 continue;
6943
6944 /* Look through the section relocs. */
6945 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6946 continue;
6947
6948 local_syms = NULL;
6949 symtab_hdr = &elf_symtab_hdr (ibfd);
6950
6951 /* Read the relocations. */
6952 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6953 info->keep_memory);
6954 if (relstart == NULL)
6955 return FALSE;
6956
6957 /* First run through the relocs to check they are sane, and to
6958 determine whether we need to edit this opd section. */
6959 need_edit = FALSE;
6960 need_pad = sec;
6961 offset = 0;
6962 relend = relstart + sec->reloc_count;
6963 for (rel = relstart; rel < relend; )
6964 {
6965 enum elf_ppc64_reloc_type r_type;
6966 unsigned long r_symndx;
6967 asection *sym_sec;
6968 struct elf_link_hash_entry *h;
6969 Elf_Internal_Sym *sym;
6970
6971 /* .opd contains a regular array of 16 or 24 byte entries. We're
6972 only interested in the reloc pointing to a function entry
6973 point. */
6974 if (rel->r_offset != offset
6975 || rel + 1 >= relend
6976 || (rel + 1)->r_offset != offset + 8)
6977 {
6978 /* If someone messes with .opd alignment then after a
6979 "ld -r" we might have padding in the middle of .opd.
6980 Also, there's nothing to prevent someone putting
6981 something silly in .opd with the assembler. No .opd
6982 optimization for them! */
6983 broken_opd:
6984 (*_bfd_error_handler)
6985 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6986 need_edit = FALSE;
6987 break;
6988 }
6989
6990 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6991 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6992 {
6993 (*_bfd_error_handler)
6994 (_("%B: unexpected reloc type %u in .opd section"),
6995 ibfd, r_type);
6996 need_edit = FALSE;
6997 break;
6998 }
6999
7000 r_symndx = ELF64_R_SYM (rel->r_info);
7001 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7002 r_symndx, ibfd))
7003 goto error_ret;
7004
7005 if (sym_sec == NULL || sym_sec->owner == NULL)
7006 {
7007 const char *sym_name;
7008 if (h != NULL)
7009 sym_name = h->root.root.string;
7010 else
7011 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7012 sym_sec);
7013
7014 (*_bfd_error_handler)
7015 (_("%B: undefined sym `%s' in .opd section"),
7016 ibfd, sym_name);
7017 need_edit = FALSE;
7018 break;
7019 }
7020
7021 /* opd entries are always for functions defined in the
7022 current input bfd. If the symbol isn't defined in the
7023 input bfd, then we won't be using the function in this
7024 bfd; It must be defined in a linkonce section in another
7025 bfd, or is weak. It's also possible that we are
7026 discarding the function due to a linker script /DISCARD/,
7027 which we test for via the output_section. */
7028 if (sym_sec->owner != ibfd
7029 || sym_sec->output_section == bfd_abs_section_ptr)
7030 need_edit = TRUE;
7031
7032 rel += 2;
7033 if (rel == relend
7034 || (rel + 1 == relend && rel->r_offset == offset + 16))
7035 {
7036 if (sec->size == offset + 24)
7037 {
7038 need_pad = NULL;
7039 break;
7040 }
7041 if (rel == relend && sec->size == offset + 16)
7042 {
7043 cnt_16b++;
7044 break;
7045 }
7046 goto broken_opd;
7047 }
7048
7049 if (rel->r_offset == offset + 24)
7050 offset += 24;
7051 else if (rel->r_offset != offset + 16)
7052 goto broken_opd;
7053 else if (rel + 1 < relend
7054 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7055 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7056 {
7057 offset += 16;
7058 cnt_16b++;
7059 }
7060 else if (rel + 2 < relend
7061 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7062 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7063 {
7064 offset += 24;
7065 rel += 1;
7066 }
7067 else
7068 goto broken_opd;
7069 }
7070
7071 add_aux_fields = non_overlapping && cnt_16b > 0;
7072
7073 if (need_edit || add_aux_fields)
7074 {
7075 Elf_Internal_Rela *write_rel;
7076 bfd_byte *rptr, *wptr;
7077 bfd_byte *new_contents;
7078 bfd_boolean skip;
7079 long opd_ent_size;
7080 bfd_size_type amt;
7081
7082 new_contents = NULL;
7083 amt = sec->size * sizeof (long) / 8;
7084 opd = &ppc64_elf_section_data (sec)->u.opd;
7085 opd->adjust = bfd_zalloc (sec->owner, amt);
7086 if (opd->adjust == NULL)
7087 return FALSE;
7088 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7089
7090 /* This seems a waste of time as input .opd sections are all
7091 zeros as generated by gcc, but I suppose there's no reason
7092 this will always be so. We might start putting something in
7093 the third word of .opd entries. */
7094 if ((sec->flags & SEC_IN_MEMORY) == 0)
7095 {
7096 bfd_byte *loc;
7097 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7098 {
7099 if (loc != NULL)
7100 free (loc);
7101 error_ret:
7102 if (local_syms != NULL
7103 && symtab_hdr->contents != (unsigned char *) local_syms)
7104 free (local_syms);
7105 if (elf_section_data (sec)->relocs != relstart)
7106 free (relstart);
7107 return FALSE;
7108 }
7109 sec->contents = loc;
7110 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7111 }
7112
7113 elf_section_data (sec)->relocs = relstart;
7114
7115 new_contents = sec->contents;
7116 if (add_aux_fields)
7117 {
7118 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7119 if (new_contents == NULL)
7120 return FALSE;
7121 need_pad = FALSE;
7122 }
7123 wptr = new_contents;
7124 rptr = sec->contents;
7125
7126 write_rel = relstart;
7127 skip = FALSE;
7128 offset = 0;
7129 opd_ent_size = 0;
7130 for (rel = relstart; rel < relend; rel++)
7131 {
7132 unsigned long r_symndx;
7133 asection *sym_sec;
7134 struct elf_link_hash_entry *h;
7135 Elf_Internal_Sym *sym;
7136
7137 r_symndx = ELF64_R_SYM (rel->r_info);
7138 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7139 r_symndx, ibfd))
7140 goto error_ret;
7141
7142 if (rel->r_offset == offset)
7143 {
7144 struct ppc_link_hash_entry *fdh = NULL;
7145
7146 /* See if the .opd entry is full 24 byte or
7147 16 byte (with fd_aux entry overlapped with next
7148 fd_func). */
7149 opd_ent_size = 24;
7150 if ((rel + 2 == relend && sec->size == offset + 16)
7151 || (rel + 3 < relend
7152 && rel[2].r_offset == offset + 16
7153 && rel[3].r_offset == offset + 24
7154 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7155 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7156 opd_ent_size = 16;
7157
7158 if (h != NULL
7159 && h->root.root.string[0] == '.')
7160 {
7161 struct ppc_link_hash_table *htab;
7162
7163 htab = ppc_hash_table (info);
7164 if (htab != NULL)
7165 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7166 htab);
7167 if (fdh != NULL
7168 && fdh->elf.root.type != bfd_link_hash_defined
7169 && fdh->elf.root.type != bfd_link_hash_defweak)
7170 fdh = NULL;
7171 }
7172
7173 skip = (sym_sec->owner != ibfd
7174 || sym_sec->output_section == bfd_abs_section_ptr);
7175 if (skip)
7176 {
7177 if (fdh != NULL && sym_sec->owner == ibfd)
7178 {
7179 /* Arrange for the function descriptor sym
7180 to be dropped. */
7181 fdh->elf.root.u.def.value = 0;
7182 fdh->elf.root.u.def.section = sym_sec;
7183 }
7184 opd->adjust[rel->r_offset / 8] = -1;
7185 }
7186 else
7187 {
7188 /* We'll be keeping this opd entry. */
7189
7190 if (fdh != NULL)
7191 {
7192 /* Redefine the function descriptor symbol to
7193 this location in the opd section. It is
7194 necessary to update the value here rather
7195 than using an array of adjustments as we do
7196 for local symbols, because various places
7197 in the generic ELF code use the value
7198 stored in u.def.value. */
7199 fdh->elf.root.u.def.value = wptr - new_contents;
7200 fdh->adjust_done = 1;
7201 }
7202
7203 /* Local syms are a bit tricky. We could
7204 tweak them as they can be cached, but
7205 we'd need to look through the local syms
7206 for the function descriptor sym which we
7207 don't have at the moment. So keep an
7208 array of adjustments. */
7209 opd->adjust[rel->r_offset / 8]
7210 = (wptr - new_contents) - (rptr - sec->contents);
7211
7212 if (wptr != rptr)
7213 memcpy (wptr, rptr, opd_ent_size);
7214 wptr += opd_ent_size;
7215 if (add_aux_fields && opd_ent_size == 16)
7216 {
7217 memset (wptr, '\0', 8);
7218 wptr += 8;
7219 }
7220 }
7221 rptr += opd_ent_size;
7222 offset += opd_ent_size;
7223 }
7224
7225 if (skip)
7226 {
7227 if (!NO_OPD_RELOCS
7228 && !info->relocatable
7229 && !dec_dynrel_count (rel->r_info, sec, info,
7230 NULL, h, sym_sec))
7231 goto error_ret;
7232 }
7233 else
7234 {
7235 /* We need to adjust any reloc offsets to point to the
7236 new opd entries. While we're at it, we may as well
7237 remove redundant relocs. */
7238 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7239 if (write_rel != rel)
7240 memcpy (write_rel, rel, sizeof (*rel));
7241 ++write_rel;
7242 }
7243 }
7244
7245 sec->size = wptr - new_contents;
7246 sec->reloc_count = write_rel - relstart;
7247 if (add_aux_fields)
7248 {
7249 free (sec->contents);
7250 sec->contents = new_contents;
7251 }
7252
7253 /* Fudge the header size too, as this is used later in
7254 elf_bfd_final_link if we are emitting relocs. */
7255 elf_section_data (sec)->rel_hdr.sh_size
7256 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7257 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7258 some_edited = TRUE;
7259 }
7260 else if (elf_section_data (sec)->relocs != relstart)
7261 free (relstart);
7262
7263 if (local_syms != NULL
7264 && symtab_hdr->contents != (unsigned char *) local_syms)
7265 {
7266 if (!info->keep_memory)
7267 free (local_syms);
7268 else
7269 symtab_hdr->contents = (unsigned char *) local_syms;
7270 }
7271 }
7272
7273 if (some_edited)
7274 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7275
7276 /* If we are doing a final link and the last .opd entry is just 16 byte
7277 long, add a 8 byte padding after it. */
7278 if (need_pad != NULL && !info->relocatable)
7279 {
7280 bfd_byte *p;
7281
7282 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7283 {
7284 BFD_ASSERT (need_pad->size > 0);
7285
7286 p = bfd_malloc (need_pad->size + 8);
7287 if (p == NULL)
7288 return FALSE;
7289
7290 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7291 p, 0, need_pad->size))
7292 return FALSE;
7293
7294 need_pad->contents = p;
7295 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7296 }
7297 else
7298 {
7299 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7300 if (p == NULL)
7301 return FALSE;
7302
7303 need_pad->contents = p;
7304 }
7305
7306 memset (need_pad->contents + need_pad->size, 0, 8);
7307 need_pad->size += 8;
7308 }
7309
7310 return TRUE;
7311 }
7312
7313 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7314
7315 asection *
7316 ppc64_elf_tls_setup (struct bfd_link_info *info,
7317 int no_tls_get_addr_opt,
7318 int *no_multi_toc)
7319 {
7320 struct ppc_link_hash_table *htab;
7321
7322 htab = ppc_hash_table (info);
7323 if (htab == NULL)
7324 return NULL;
7325
7326 if (*no_multi_toc)
7327 htab->do_multi_toc = 0;
7328 else if (!htab->do_multi_toc)
7329 *no_multi_toc = 1;
7330
7331 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7332 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7333 FALSE, FALSE, TRUE));
7334 /* Move dynamic linking info to the function descriptor sym. */
7335 if (htab->tls_get_addr != NULL)
7336 func_desc_adjust (&htab->tls_get_addr->elf, info);
7337 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7338 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7339 FALSE, FALSE, TRUE));
7340 if (!no_tls_get_addr_opt)
7341 {
7342 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7343
7344 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7345 FALSE, FALSE, TRUE);
7346 if (opt != NULL)
7347 func_desc_adjust (opt, info);
7348 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7349 FALSE, FALSE, TRUE);
7350 if (opt_fd != NULL
7351 && (opt_fd->root.type == bfd_link_hash_defined
7352 || opt_fd->root.type == bfd_link_hash_defweak))
7353 {
7354 /* If glibc supports an optimized __tls_get_addr call stub,
7355 signalled by the presence of __tls_get_addr_opt, and we'll
7356 be calling __tls_get_addr via a plt call stub, then
7357 make __tls_get_addr point to __tls_get_addr_opt. */
7358 tga_fd = &htab->tls_get_addr_fd->elf;
7359 if (htab->elf.dynamic_sections_created
7360 && tga_fd != NULL
7361 && (tga_fd->type == STT_FUNC
7362 || tga_fd->needs_plt)
7363 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7364 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7365 && tga_fd->root.type == bfd_link_hash_undefweak)))
7366 {
7367 struct plt_entry *ent;
7368
7369 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7370 if (ent->plt.refcount > 0)
7371 break;
7372 if (ent != NULL)
7373 {
7374 tga_fd->root.type = bfd_link_hash_indirect;
7375 tga_fd->root.u.i.link = &opt_fd->root;
7376 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7377 if (opt_fd->dynindx != -1)
7378 {
7379 /* Use __tls_get_addr_opt in dynamic relocations. */
7380 opt_fd->dynindx = -1;
7381 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7382 opt_fd->dynstr_index);
7383 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7384 return NULL;
7385 }
7386 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7387 tga = &htab->tls_get_addr->elf;
7388 if (opt != NULL && tga != NULL)
7389 {
7390 tga->root.type = bfd_link_hash_indirect;
7391 tga->root.u.i.link = &opt->root;
7392 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7393 _bfd_elf_link_hash_hide_symbol (info, opt,
7394 tga->forced_local);
7395 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7396 }
7397 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7398 htab->tls_get_addr_fd->is_func_descriptor = 1;
7399 if (htab->tls_get_addr != NULL)
7400 {
7401 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7402 htab->tls_get_addr->is_func = 1;
7403 }
7404 }
7405 }
7406 }
7407 else
7408 no_tls_get_addr_opt = TRUE;
7409 }
7410 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7411 return _bfd_elf_tls_setup (info->output_bfd, info);
7412 }
7413
7414 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7415 HASH1 or HASH2. */
7416
7417 static bfd_boolean
7418 branch_reloc_hash_match (const bfd *ibfd,
7419 const Elf_Internal_Rela *rel,
7420 const struct ppc_link_hash_entry *hash1,
7421 const struct ppc_link_hash_entry *hash2)
7422 {
7423 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7424 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7425 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7426
7427 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7428 {
7429 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7430 struct elf_link_hash_entry *h;
7431
7432 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7433 h = elf_follow_link (h);
7434 if (h == &hash1->elf || h == &hash2->elf)
7435 return TRUE;
7436 }
7437 return FALSE;
7438 }
7439
7440 /* Run through all the TLS relocs looking for optimization
7441 opportunities. The linker has been hacked (see ppc64elf.em) to do
7442 a preliminary section layout so that we know the TLS segment
7443 offsets. We can't optimize earlier because some optimizations need
7444 to know the tp offset, and we need to optimize before allocating
7445 dynamic relocations. */
7446
7447 bfd_boolean
7448 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7449 {
7450 bfd *ibfd;
7451 asection *sec;
7452 struct ppc_link_hash_table *htab;
7453 int pass;
7454
7455 if (info->relocatable || !info->executable)
7456 return TRUE;
7457
7458 htab = ppc_hash_table (info);
7459 if (htab == NULL)
7460 return FALSE;
7461
7462 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7463 {
7464 Elf_Internal_Sym *locsyms = NULL;
7465 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7466 unsigned char *toc_ref = NULL;
7467
7468 /* Look at all the sections for this file. Make two passes over
7469 the relocs. On the first pass, mark toc entries involved
7470 with tls relocs, and check that tls relocs involved in
7471 setting up a tls_get_addr call are indeed followed by such a
7472 call. If they are not, exclude them from the optimizations
7473 done on the second pass. */
7474 for (pass = 0; pass < 2; ++pass)
7475 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7476 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7477 {
7478 Elf_Internal_Rela *relstart, *rel, *relend;
7479
7480 /* Read the relocations. */
7481 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7482 info->keep_memory);
7483 if (relstart == NULL)
7484 return FALSE;
7485
7486 relend = relstart + sec->reloc_count;
7487 for (rel = relstart; rel < relend; rel++)
7488 {
7489 enum elf_ppc64_reloc_type r_type;
7490 unsigned long r_symndx;
7491 struct elf_link_hash_entry *h;
7492 Elf_Internal_Sym *sym;
7493 asection *sym_sec;
7494 unsigned char *tls_mask;
7495 unsigned char tls_set, tls_clear, tls_type = 0;
7496 bfd_vma value;
7497 bfd_boolean ok_tprel, is_local;
7498 long toc_ref_index = 0;
7499 int expecting_tls_get_addr = 0;
7500
7501 r_symndx = ELF64_R_SYM (rel->r_info);
7502 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7503 r_symndx, ibfd))
7504 {
7505 err_free_rel:
7506 if (elf_section_data (sec)->relocs != relstart)
7507 free (relstart);
7508 if (toc_ref != NULL)
7509 free (toc_ref);
7510 if (locsyms != NULL
7511 && (elf_symtab_hdr (ibfd).contents
7512 != (unsigned char *) locsyms))
7513 free (locsyms);
7514 return FALSE;
7515 }
7516
7517 if (h != NULL)
7518 {
7519 if (h->root.type == bfd_link_hash_defined
7520 || h->root.type == bfd_link_hash_defweak)
7521 value = h->root.u.def.value;
7522 else if (h->root.type == bfd_link_hash_undefweak)
7523 value = 0;
7524 else
7525 continue;
7526 }
7527 else
7528 /* Symbols referenced by TLS relocs must be of type
7529 STT_TLS. So no need for .opd local sym adjust. */
7530 value = sym->st_value;
7531
7532 ok_tprel = FALSE;
7533 is_local = FALSE;
7534 if (h == NULL
7535 || !h->def_dynamic)
7536 {
7537 is_local = TRUE;
7538 if (h != NULL
7539 && h->root.type == bfd_link_hash_undefweak)
7540 ok_tprel = TRUE;
7541 else
7542 {
7543 value += sym_sec->output_offset;
7544 value += sym_sec->output_section->vma;
7545 value -= htab->elf.tls_sec->vma;
7546 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7547 < (bfd_vma) 1 << 32);
7548 }
7549 }
7550
7551 r_type = ELF64_R_TYPE (rel->r_info);
7552 switch (r_type)
7553 {
7554 case R_PPC64_GOT_TLSLD16:
7555 case R_PPC64_GOT_TLSLD16_LO:
7556 expecting_tls_get_addr = 1;
7557 /* Fall thru */
7558
7559 case R_PPC64_GOT_TLSLD16_HI:
7560 case R_PPC64_GOT_TLSLD16_HA:
7561 /* These relocs should never be against a symbol
7562 defined in a shared lib. Leave them alone if
7563 that turns out to be the case. */
7564 if (!is_local)
7565 continue;
7566
7567 /* LD -> LE */
7568 tls_set = 0;
7569 tls_clear = TLS_LD;
7570 tls_type = TLS_TLS | TLS_LD;
7571 break;
7572
7573 case R_PPC64_GOT_TLSGD16:
7574 case R_PPC64_GOT_TLSGD16_LO:
7575 expecting_tls_get_addr = 1;
7576 /* Fall thru */
7577
7578 case R_PPC64_GOT_TLSGD16_HI:
7579 case R_PPC64_GOT_TLSGD16_HA:
7580 if (ok_tprel)
7581 /* GD -> LE */
7582 tls_set = 0;
7583 else
7584 /* GD -> IE */
7585 tls_set = TLS_TLS | TLS_TPRELGD;
7586 tls_clear = TLS_GD;
7587 tls_type = TLS_TLS | TLS_GD;
7588 break;
7589
7590 case R_PPC64_GOT_TPREL16_DS:
7591 case R_PPC64_GOT_TPREL16_LO_DS:
7592 case R_PPC64_GOT_TPREL16_HI:
7593 case R_PPC64_GOT_TPREL16_HA:
7594 if (ok_tprel)
7595 {
7596 /* IE -> LE */
7597 tls_set = 0;
7598 tls_clear = TLS_TPREL;
7599 tls_type = TLS_TLS | TLS_TPREL;
7600 break;
7601 }
7602 continue;
7603
7604 case R_PPC64_TOC16:
7605 case R_PPC64_TOC16_LO:
7606 case R_PPC64_TLS:
7607 case R_PPC64_TLSGD:
7608 case R_PPC64_TLSLD:
7609 if (sym_sec == NULL || sym_sec != toc)
7610 continue;
7611
7612 /* Mark this toc entry as referenced by a TLS
7613 code sequence. We can do that now in the
7614 case of R_PPC64_TLS, and after checking for
7615 tls_get_addr for the TOC16 relocs. */
7616 if (toc_ref == NULL)
7617 {
7618 toc_ref = bfd_zmalloc (toc->size / 8);
7619 if (toc_ref == NULL)
7620 goto err_free_rel;
7621 }
7622 if (h != NULL)
7623 value = h->root.u.def.value;
7624 else
7625 value = sym->st_value;
7626 value += rel->r_addend;
7627 BFD_ASSERT (value < toc->size && value % 8 == 0);
7628 toc_ref_index = value / 8;
7629 if (r_type == R_PPC64_TLS
7630 || r_type == R_PPC64_TLSGD
7631 || r_type == R_PPC64_TLSLD)
7632 {
7633 toc_ref[toc_ref_index] = 1;
7634 continue;
7635 }
7636
7637 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7638 continue;
7639
7640 tls_set = 0;
7641 tls_clear = 0;
7642 expecting_tls_get_addr = 2;
7643 break;
7644
7645 case R_PPC64_TPREL64:
7646 if (pass == 0
7647 || sec != toc
7648 || toc_ref == NULL
7649 || !toc_ref[rel->r_offset / 8])
7650 continue;
7651 if (ok_tprel)
7652 {
7653 /* IE -> LE */
7654 tls_set = TLS_EXPLICIT;
7655 tls_clear = TLS_TPREL;
7656 break;
7657 }
7658 continue;
7659
7660 case R_PPC64_DTPMOD64:
7661 if (pass == 0
7662 || sec != toc
7663 || toc_ref == NULL
7664 || !toc_ref[rel->r_offset / 8])
7665 continue;
7666 if (rel + 1 < relend
7667 && (rel[1].r_info
7668 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7669 && rel[1].r_offset == rel->r_offset + 8)
7670 {
7671 if (ok_tprel)
7672 /* GD -> LE */
7673 tls_set = TLS_EXPLICIT | TLS_GD;
7674 else
7675 /* GD -> IE */
7676 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7677 tls_clear = TLS_GD;
7678 }
7679 else
7680 {
7681 if (!is_local)
7682 continue;
7683
7684 /* LD -> LE */
7685 tls_set = TLS_EXPLICIT;
7686 tls_clear = TLS_LD;
7687 }
7688 break;
7689
7690 default:
7691 continue;
7692 }
7693
7694 if (pass == 0)
7695 {
7696 if (!expecting_tls_get_addr
7697 || !sec->has_tls_get_addr_call)
7698 continue;
7699
7700 if (rel + 1 < relend
7701 && branch_reloc_hash_match (ibfd, rel + 1,
7702 htab->tls_get_addr,
7703 htab->tls_get_addr_fd))
7704 {
7705 if (expecting_tls_get_addr == 2)
7706 {
7707 /* Check for toc tls entries. */
7708 unsigned char *toc_tls;
7709 int retval;
7710
7711 retval = get_tls_mask (&toc_tls, NULL, NULL,
7712 &locsyms,
7713 rel, ibfd);
7714 if (retval == 0)
7715 goto err_free_rel;
7716 if (retval > 1 && toc_tls != NULL)
7717 toc_ref[toc_ref_index] = 1;
7718 }
7719 continue;
7720 }
7721
7722 if (expecting_tls_get_addr != 1)
7723 continue;
7724
7725 /* Uh oh, we didn't find the expected call. We
7726 could just mark this symbol to exclude it
7727 from tls optimization but it's safer to skip
7728 the entire section. */
7729 sec->has_tls_reloc = 0;
7730 break;
7731 }
7732
7733 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7734 {
7735 struct plt_entry *ent;
7736 for (ent = htab->tls_get_addr->elf.plt.plist;
7737 ent != NULL;
7738 ent = ent->next)
7739 if (ent->addend == 0)
7740 {
7741 if (ent->plt.refcount > 0)
7742 {
7743 ent->plt.refcount -= 1;
7744 expecting_tls_get_addr = 0;
7745 }
7746 break;
7747 }
7748 }
7749
7750 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7751 {
7752 struct plt_entry *ent;
7753 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7754 ent != NULL;
7755 ent = ent->next)
7756 if (ent->addend == 0)
7757 {
7758 if (ent->plt.refcount > 0)
7759 ent->plt.refcount -= 1;
7760 break;
7761 }
7762 }
7763
7764 if (tls_clear == 0)
7765 continue;
7766
7767 if ((tls_set & TLS_EXPLICIT) == 0)
7768 {
7769 struct got_entry *ent;
7770
7771 /* Adjust got entry for this reloc. */
7772 if (h != NULL)
7773 ent = h->got.glist;
7774 else
7775 ent = elf_local_got_ents (ibfd)[r_symndx];
7776
7777 for (; ent != NULL; ent = ent->next)
7778 if (ent->addend == rel->r_addend
7779 && ent->owner == ibfd
7780 && ent->tls_type == tls_type)
7781 break;
7782 if (ent == NULL)
7783 abort ();
7784
7785 if (tls_set == 0)
7786 {
7787 /* We managed to get rid of a got entry. */
7788 if (ent->got.refcount > 0)
7789 ent->got.refcount -= 1;
7790 }
7791 }
7792 else
7793 {
7794 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7795 we'll lose one or two dyn relocs. */
7796 if (!dec_dynrel_count (rel->r_info, sec, info,
7797 NULL, h, sym_sec))
7798 return FALSE;
7799
7800 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7801 {
7802 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7803 NULL, h, sym_sec))
7804 return FALSE;
7805 }
7806 }
7807
7808 *tls_mask |= tls_set;
7809 *tls_mask &= ~tls_clear;
7810 }
7811
7812 if (elf_section_data (sec)->relocs != relstart)
7813 free (relstart);
7814 }
7815
7816 if (toc_ref != NULL)
7817 free (toc_ref);
7818
7819 if (locsyms != NULL
7820 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7821 {
7822 if (!info->keep_memory)
7823 free (locsyms);
7824 else
7825 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7826 }
7827 }
7828 return TRUE;
7829 }
7830
7831 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7832 the values of any global symbols in a toc section that has been
7833 edited. Globals in toc sections should be a rarity, so this function
7834 sets a flag if any are found in toc sections other than the one just
7835 edited, so that futher hash table traversals can be avoided. */
7836
7837 struct adjust_toc_info
7838 {
7839 asection *toc;
7840 unsigned long *skip;
7841 bfd_boolean global_toc_syms;
7842 };
7843
7844 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7845
7846 static bfd_boolean
7847 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7848 {
7849 struct ppc_link_hash_entry *eh;
7850 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7851 unsigned long i;
7852
7853 if (h->root.type == bfd_link_hash_indirect)
7854 return TRUE;
7855
7856 if (h->root.type == bfd_link_hash_warning)
7857 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7858
7859 if (h->root.type != bfd_link_hash_defined
7860 && h->root.type != bfd_link_hash_defweak)
7861 return TRUE;
7862
7863 eh = (struct ppc_link_hash_entry *) h;
7864 if (eh->adjust_done)
7865 return TRUE;
7866
7867 if (eh->elf.root.u.def.section == toc_inf->toc)
7868 {
7869 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7870 i = toc_inf->toc->rawsize >> 3;
7871 else
7872 i = eh->elf.root.u.def.value >> 3;
7873
7874 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7875 {
7876 (*_bfd_error_handler)
7877 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7878 do
7879 ++i;
7880 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7881 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7882 }
7883
7884 eh->elf.root.u.def.value -= toc_inf->skip[i];
7885 eh->adjust_done = 1;
7886 }
7887 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7888 toc_inf->global_toc_syms = TRUE;
7889
7890 return TRUE;
7891 }
7892
7893 /* Examine all relocs referencing .toc sections in order to remove
7894 unused .toc entries. */
7895
7896 bfd_boolean
7897 ppc64_elf_edit_toc (struct bfd_link_info *info)
7898 {
7899 bfd *ibfd;
7900 struct adjust_toc_info toc_inf;
7901 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7902
7903 htab->do_toc_opt = 1;
7904 toc_inf.global_toc_syms = TRUE;
7905 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7906 {
7907 asection *toc, *sec;
7908 Elf_Internal_Shdr *symtab_hdr;
7909 Elf_Internal_Sym *local_syms;
7910 Elf_Internal_Rela *relstart, *rel;
7911 unsigned long *skip, *drop;
7912 unsigned char *used;
7913 unsigned char *keep, last, some_unused;
7914
7915 if (!is_ppc64_elf (ibfd))
7916 continue;
7917
7918 toc = bfd_get_section_by_name (ibfd, ".toc");
7919 if (toc == NULL
7920 || toc->size == 0
7921 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7922 || elf_discarded_section (toc))
7923 continue;
7924
7925 local_syms = NULL;
7926 symtab_hdr = &elf_symtab_hdr (ibfd);
7927
7928 /* Look at sections dropped from the final link. */
7929 skip = NULL;
7930 relstart = NULL;
7931 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7932 {
7933 if (sec->reloc_count == 0
7934 || !elf_discarded_section (sec)
7935 || get_opd_info (sec)
7936 || (sec->flags & SEC_ALLOC) == 0
7937 || (sec->flags & SEC_DEBUGGING) != 0)
7938 continue;
7939
7940 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7941 if (relstart == NULL)
7942 goto error_ret;
7943
7944 /* Run through the relocs to see which toc entries might be
7945 unused. */
7946 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7947 {
7948 enum elf_ppc64_reloc_type r_type;
7949 unsigned long r_symndx;
7950 asection *sym_sec;
7951 struct elf_link_hash_entry *h;
7952 Elf_Internal_Sym *sym;
7953 bfd_vma val;
7954
7955 r_type = ELF64_R_TYPE (rel->r_info);
7956 switch (r_type)
7957 {
7958 default:
7959 continue;
7960
7961 case R_PPC64_TOC16:
7962 case R_PPC64_TOC16_LO:
7963 case R_PPC64_TOC16_HI:
7964 case R_PPC64_TOC16_HA:
7965 case R_PPC64_TOC16_DS:
7966 case R_PPC64_TOC16_LO_DS:
7967 break;
7968 }
7969
7970 r_symndx = ELF64_R_SYM (rel->r_info);
7971 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7972 r_symndx, ibfd))
7973 goto error_ret;
7974
7975 if (sym_sec != toc)
7976 continue;
7977
7978 if (h != NULL)
7979 val = h->root.u.def.value;
7980 else
7981 val = sym->st_value;
7982 val += rel->r_addend;
7983
7984 if (val >= toc->size)
7985 continue;
7986
7987 /* Anything in the toc ought to be aligned to 8 bytes.
7988 If not, don't mark as unused. */
7989 if (val & 7)
7990 continue;
7991
7992 if (skip == NULL)
7993 {
7994 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
7995 if (skip == NULL)
7996 goto error_ret;
7997 }
7998
7999 skip[val >> 3] = ref_from_discarded;
8000 }
8001
8002 if (elf_section_data (sec)->relocs != relstart)
8003 free (relstart);
8004 }
8005
8006 /* For largetoc loads of address constants, we can convert
8007 . addis rx,2,addr@got@ha
8008 . ld ry,addr@got@l(rx)
8009 to
8010 . addis rx,2,addr@toc@ha
8011 . addi ry,rx,addr@toc@l
8012 when addr is within 2G of the toc pointer. This then means
8013 that the word storing "addr" in the toc is no longer needed. */
8014
8015 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8016 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8017 && toc->reloc_count != 0)
8018 {
8019 /* Read toc relocs. */
8020 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8021 info->keep_memory);
8022 if (relstart == NULL)
8023 goto error_ret;
8024
8025 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8026 {
8027 enum elf_ppc64_reloc_type r_type;
8028 unsigned long r_symndx;
8029 asection *sym_sec;
8030 struct elf_link_hash_entry *h;
8031 Elf_Internal_Sym *sym;
8032 bfd_vma val, addr;
8033
8034 r_type = ELF64_R_TYPE (rel->r_info);
8035 if (r_type != R_PPC64_ADDR64)
8036 continue;
8037
8038 r_symndx = ELF64_R_SYM (rel->r_info);
8039 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8040 r_symndx, ibfd))
8041 goto error_ret;
8042
8043 if (!SYMBOL_CALLS_LOCAL (info, h))
8044 continue;
8045
8046 if (h != NULL)
8047 {
8048 if (h->type == STT_GNU_IFUNC)
8049 continue;
8050 val = h->root.u.def.value;
8051 }
8052 else
8053 {
8054 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8055 continue;
8056 val = sym->st_value;
8057 }
8058 val += rel->r_addend;
8059 val += sym_sec->output_section->vma + sym_sec->output_offset;
8060
8061 /* We don't yet know the exact toc pointer value, but we
8062 know it will be somewhere in the toc section. Don't
8063 optimize if the difference from any possible toc
8064 pointer is outside [ff..f80008000, 7fff7fff]. */
8065 addr = toc->output_section->vma + TOC_BASE_OFF;
8066 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8067 continue;
8068
8069 addr = toc->output_section->vma + toc->output_section->rawsize;
8070 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8071 continue;
8072
8073 if (skip == NULL)
8074 {
8075 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8076 if (skip == NULL)
8077 goto error_ret;
8078 }
8079
8080 skip[rel->r_offset >> 3]
8081 |= can_optimize | ((rel - relstart) << 2);
8082 }
8083
8084 if (elf_section_data (toc)->relocs != relstart)
8085 free (relstart);
8086 }
8087
8088 if (skip == NULL)
8089 continue;
8090
8091 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8092 if (used == NULL)
8093 {
8094 error_ret:
8095 if (local_syms != NULL
8096 && symtab_hdr->contents != (unsigned char *) local_syms)
8097 free (local_syms);
8098 if (sec != NULL
8099 && relstart != NULL
8100 && elf_section_data (sec)->relocs != relstart)
8101 free (relstart);
8102 if (skip != NULL)
8103 free (skip);
8104 return FALSE;
8105 }
8106
8107 /* Now check all kept sections that might reference the toc.
8108 Check the toc itself last. */
8109 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8110 : ibfd->sections);
8111 sec != NULL;
8112 sec = (sec == toc ? NULL
8113 : sec->next == NULL ? toc
8114 : sec->next == toc && toc->next ? toc->next
8115 : sec->next))
8116 {
8117 int repeat;
8118
8119 if (sec->reloc_count == 0
8120 || elf_discarded_section (sec)
8121 || get_opd_info (sec)
8122 || (sec->flags & SEC_ALLOC) == 0
8123 || (sec->flags & SEC_DEBUGGING) != 0)
8124 continue;
8125
8126 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8127 info->keep_memory);
8128 if (relstart == NULL)
8129 goto error_ret;
8130
8131 /* Mark toc entries referenced as used. */
8132 repeat = 0;
8133 do
8134 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8135 {
8136 enum elf_ppc64_reloc_type r_type;
8137 unsigned long r_symndx;
8138 asection *sym_sec;
8139 struct elf_link_hash_entry *h;
8140 Elf_Internal_Sym *sym;
8141 bfd_vma val;
8142
8143 r_type = ELF64_R_TYPE (rel->r_info);
8144 switch (r_type)
8145 {
8146 case R_PPC64_TOC16:
8147 case R_PPC64_TOC16_LO:
8148 case R_PPC64_TOC16_HI:
8149 case R_PPC64_TOC16_HA:
8150 case R_PPC64_TOC16_DS:
8151 case R_PPC64_TOC16_LO_DS:
8152 /* In case we're taking addresses of toc entries. */
8153 case R_PPC64_ADDR64:
8154 break;
8155
8156 default:
8157 continue;
8158 }
8159
8160 r_symndx = ELF64_R_SYM (rel->r_info);
8161 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8162 r_symndx, ibfd))
8163 {
8164 free (used);
8165 goto error_ret;
8166 }
8167
8168 if (sym_sec != toc)
8169 continue;
8170
8171 if (h != NULL)
8172 val = h->root.u.def.value;
8173 else
8174 val = sym->st_value;
8175 val += rel->r_addend;
8176
8177 if (val >= toc->size)
8178 continue;
8179
8180 if ((skip[val >> 3] & can_optimize) != 0)
8181 {
8182 bfd_vma off;
8183 unsigned char opc;
8184
8185 switch (r_type)
8186 {
8187 case R_PPC64_TOC16_HA:
8188 break;
8189
8190 case R_PPC64_TOC16_LO_DS:
8191 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8192 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8193 return FALSE;
8194 if ((opc & (0x3f << 2)) == (58u << 2))
8195 break;
8196 /* Fall thru */
8197
8198 default:
8199 /* Wrong sort of reloc, or not a ld. We may
8200 as well clear ref_from_discarded too. */
8201 skip[val >> 3] = 0;
8202 }
8203 }
8204
8205 /* For the toc section, we only mark as used if
8206 this entry itself isn't unused. */
8207 if (sec == toc
8208 && !used[val >> 3]
8209 && (used[rel->r_offset >> 3]
8210 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8211 /* Do all the relocs again, to catch reference
8212 chains. */
8213 repeat = 1;
8214
8215 used[val >> 3] = 1;
8216 }
8217 while (repeat);
8218
8219 if (elf_section_data (sec)->relocs != relstart)
8220 free (relstart);
8221 }
8222
8223 /* Merge the used and skip arrays. Assume that TOC
8224 doublewords not appearing as either used or unused belong
8225 to to an entry more than one doubleword in size. */
8226 for (drop = skip, keep = used, last = 0, some_unused = 0;
8227 drop < skip + (toc->size + 7) / 8;
8228 ++drop, ++keep)
8229 {
8230 if (*keep)
8231 {
8232 *drop &= ~ref_from_discarded;
8233 if ((*drop & can_optimize) != 0)
8234 some_unused = 1;
8235 last = 0;
8236 }
8237 else if (*drop)
8238 {
8239 some_unused = 1;
8240 last = ref_from_discarded;
8241 }
8242 else
8243 *drop = last;
8244 }
8245
8246 free (used);
8247
8248 if (some_unused)
8249 {
8250 bfd_byte *contents, *src;
8251 unsigned long off;
8252 Elf_Internal_Sym *sym;
8253 bfd_boolean local_toc_syms = FALSE;
8254
8255 /* Shuffle the toc contents, and at the same time convert the
8256 skip array from booleans into offsets. */
8257 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8258 goto error_ret;
8259
8260 elf_section_data (toc)->this_hdr.contents = contents;
8261
8262 for (src = contents, off = 0, drop = skip;
8263 src < contents + toc->size;
8264 src += 8, ++drop)
8265 {
8266 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8267 off += 8;
8268 else if (off != 0)
8269 {
8270 *drop = off;
8271 memcpy (src - off, src, 8);
8272 }
8273 }
8274 *drop = off;
8275 toc->rawsize = toc->size;
8276 toc->size = src - contents - off;
8277
8278 /* Adjust addends for relocs against the toc section sym,
8279 and optimize any accesses we can. */
8280 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8281 {
8282 if (sec->reloc_count == 0
8283 || elf_discarded_section (sec))
8284 continue;
8285
8286 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8287 info->keep_memory);
8288 if (relstart == NULL)
8289 goto error_ret;
8290
8291 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8292 {
8293 enum elf_ppc64_reloc_type r_type;
8294 unsigned long r_symndx;
8295 asection *sym_sec;
8296 struct elf_link_hash_entry *h;
8297 bfd_vma val;
8298
8299 r_type = ELF64_R_TYPE (rel->r_info);
8300 switch (r_type)
8301 {
8302 default:
8303 continue;
8304
8305 case R_PPC64_TOC16:
8306 case R_PPC64_TOC16_LO:
8307 case R_PPC64_TOC16_HI:
8308 case R_PPC64_TOC16_HA:
8309 case R_PPC64_TOC16_DS:
8310 case R_PPC64_TOC16_LO_DS:
8311 case R_PPC64_ADDR64:
8312 break;
8313 }
8314
8315 r_symndx = ELF64_R_SYM (rel->r_info);
8316 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8317 r_symndx, ibfd))
8318 goto error_ret;
8319
8320 if (sym_sec != toc)
8321 continue;
8322
8323 if (h != NULL)
8324 val = h->root.u.def.value;
8325 else
8326 {
8327 val = sym->st_value;
8328 if (val != 0)
8329 local_toc_syms = TRUE;
8330 }
8331
8332 val += rel->r_addend;
8333
8334 if (val > toc->rawsize)
8335 val = toc->rawsize;
8336 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8337 continue;
8338 else if ((skip[val >> 3] & can_optimize) != 0)
8339 {
8340 Elf_Internal_Rela *tocrel
8341 = elf_section_data (toc)->relocs + (skip[val >> 3] >> 2);
8342 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8343
8344 switch (r_type)
8345 {
8346 case R_PPC64_TOC16_HA:
8347 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8348 break;
8349
8350 case R_PPC64_TOC16_LO_DS:
8351 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8352 break;
8353
8354 default:
8355 abort ();
8356 }
8357 rel->r_addend = tocrel->r_addend;
8358 elf_section_data (sec)->relocs = relstart;
8359 continue;
8360 }
8361
8362 if (h != NULL || sym->st_value != 0)
8363 continue;
8364
8365 rel->r_addend -= skip[val >> 3];
8366 elf_section_data (sec)->relocs = relstart;
8367 }
8368
8369 if (elf_section_data (sec)->relocs != relstart)
8370 free (relstart);
8371 }
8372
8373 /* We shouldn't have local or global symbols defined in the TOC,
8374 but handle them anyway. */
8375 for (sym = local_syms;
8376 sym < local_syms + symtab_hdr->sh_info;
8377 ++sym)
8378 if (sym->st_value != 0
8379 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8380 {
8381 unsigned long i;
8382
8383 if (sym->st_value > toc->rawsize)
8384 i = toc->rawsize >> 3;
8385 else
8386 i = sym->st_value >> 3;
8387
8388 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8389 {
8390 if (local_toc_syms)
8391 (*_bfd_error_handler)
8392 (_("%s defined on removed toc entry"),
8393 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8394 do
8395 ++i;
8396 while ((skip[i] & (ref_from_discarded | can_optimize)));
8397 sym->st_value = (bfd_vma) i << 3;
8398 }
8399
8400 sym->st_value -= skip[i];
8401 symtab_hdr->contents = (unsigned char *) local_syms;
8402 }
8403
8404 /* Adjust any global syms defined in this toc input section. */
8405 if (toc_inf.global_toc_syms)
8406 {
8407 toc_inf.toc = toc;
8408 toc_inf.skip = skip;
8409 toc_inf.global_toc_syms = FALSE;
8410 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8411 &toc_inf);
8412 }
8413
8414 if (toc->reloc_count != 0)
8415 {
8416 Elf_Internal_Rela *wrel;
8417 bfd_size_type sz;
8418
8419 /* Read toc relocs. */
8420 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8421 TRUE);
8422 if (relstart == NULL)
8423 goto error_ret;
8424
8425 /* Remove unused toc relocs, and adjust those we keep. */
8426 wrel = relstart;
8427 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8428 if ((skip[rel->r_offset >> 3]
8429 & (ref_from_discarded | can_optimize)) == 0)
8430 {
8431 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8432 wrel->r_info = rel->r_info;
8433 wrel->r_addend = rel->r_addend;
8434 ++wrel;
8435 }
8436 else if (!dec_dynrel_count (rel->r_info, toc, info,
8437 &local_syms, NULL, NULL))
8438 goto error_ret;
8439
8440 toc->reloc_count = wrel - relstart;
8441 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8442 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8443 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8444 }
8445 }
8446
8447 if (local_syms != NULL
8448 && symtab_hdr->contents != (unsigned char *) local_syms)
8449 {
8450 if (!info->keep_memory)
8451 free (local_syms);
8452 else
8453 symtab_hdr->contents = (unsigned char *) local_syms;
8454 }
8455 free (skip);
8456 }
8457
8458 return TRUE;
8459 }
8460
8461 /* Return true iff input section I references the TOC using
8462 instructions limited to +/-32k offsets. */
8463
8464 bfd_boolean
8465 ppc64_elf_has_small_toc_reloc (asection *i)
8466 {
8467 return (is_ppc64_elf (i->owner)
8468 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8469 }
8470
8471 /* Allocate space for one GOT entry. */
8472
8473 static void
8474 allocate_got (struct elf_link_hash_entry *h,
8475 struct bfd_link_info *info,
8476 struct got_entry *gent)
8477 {
8478 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8479 bfd_boolean dyn;
8480 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8481 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8482 ? 16 : 8);
8483 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8484 ? 2 : 1) * sizeof (Elf64_External_Rela);
8485 asection *got = ppc64_elf_tdata (gent->owner)->got;
8486
8487 gent->got.offset = got->size;
8488 got->size += entsize;
8489
8490 dyn = htab->elf.dynamic_sections_created;
8491 if ((info->shared
8492 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8493 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8494 || h->root.type != bfd_link_hash_undefweak))
8495 {
8496 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8497 relgot->size += rentsize;
8498 }
8499 else if (h->type == STT_GNU_IFUNC)
8500 {
8501 asection *relgot = htab->reliplt;
8502 relgot->size += rentsize;
8503 htab->got_reli_size += rentsize;
8504 }
8505 }
8506
8507 /* This function merges got entries in the same toc group. */
8508
8509 static void
8510 merge_got_entries (struct got_entry **pent)
8511 {
8512 struct got_entry *ent, *ent2;
8513
8514 for (ent = *pent; ent != NULL; ent = ent->next)
8515 if (!ent->is_indirect)
8516 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8517 if (!ent2->is_indirect
8518 && ent2->addend == ent->addend
8519 && ent2->tls_type == ent->tls_type
8520 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8521 {
8522 ent2->is_indirect = TRUE;
8523 ent2->got.ent = ent;
8524 }
8525 }
8526
8527 /* Allocate space in .plt, .got and associated reloc sections for
8528 dynamic relocs. */
8529
8530 static bfd_boolean
8531 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8532 {
8533 struct bfd_link_info *info;
8534 struct ppc_link_hash_table *htab;
8535 asection *s;
8536 struct ppc_link_hash_entry *eh;
8537 struct ppc_dyn_relocs *p;
8538 struct got_entry **pgent, *gent;
8539
8540 if (h->root.type == bfd_link_hash_indirect)
8541 return TRUE;
8542
8543 if (h->root.type == bfd_link_hash_warning)
8544 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8545
8546 info = (struct bfd_link_info *) inf;
8547 htab = ppc_hash_table (info);
8548 if (htab == NULL)
8549 return FALSE;
8550
8551 if ((htab->elf.dynamic_sections_created
8552 && h->dynindx != -1
8553 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8554 || h->type == STT_GNU_IFUNC)
8555 {
8556 struct plt_entry *pent;
8557 bfd_boolean doneone = FALSE;
8558 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8559 if (pent->plt.refcount > 0)
8560 {
8561 if (!htab->elf.dynamic_sections_created
8562 || h->dynindx == -1)
8563 {
8564 s = htab->iplt;
8565 pent->plt.offset = s->size;
8566 s->size += PLT_ENTRY_SIZE;
8567 s = htab->reliplt;
8568 }
8569 else
8570 {
8571 /* If this is the first .plt entry, make room for the special
8572 first entry. */
8573 s = htab->plt;
8574 if (s->size == 0)
8575 s->size += PLT_INITIAL_ENTRY_SIZE;
8576
8577 pent->plt.offset = s->size;
8578
8579 /* Make room for this entry. */
8580 s->size += PLT_ENTRY_SIZE;
8581
8582 /* Make room for the .glink code. */
8583 s = htab->glink;
8584 if (s->size == 0)
8585 s->size += GLINK_CALL_STUB_SIZE;
8586 /* We need bigger stubs past index 32767. */
8587 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8588 s->size += 4;
8589 s->size += 2*4;
8590
8591 /* We also need to make an entry in the .rela.plt section. */
8592 s = htab->relplt;
8593 }
8594 s->size += sizeof (Elf64_External_Rela);
8595 doneone = TRUE;
8596 }
8597 else
8598 pent->plt.offset = (bfd_vma) -1;
8599 if (!doneone)
8600 {
8601 h->plt.plist = NULL;
8602 h->needs_plt = 0;
8603 }
8604 }
8605 else
8606 {
8607 h->plt.plist = NULL;
8608 h->needs_plt = 0;
8609 }
8610
8611 eh = (struct ppc_link_hash_entry *) h;
8612 /* Run through the TLS GD got entries first if we're changing them
8613 to TPREL. */
8614 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8615 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8616 if (gent->got.refcount > 0
8617 && (gent->tls_type & TLS_GD) != 0)
8618 {
8619 /* This was a GD entry that has been converted to TPREL. If
8620 there happens to be a TPREL entry we can use that one. */
8621 struct got_entry *ent;
8622 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8623 if (ent->got.refcount > 0
8624 && (ent->tls_type & TLS_TPREL) != 0
8625 && ent->addend == gent->addend
8626 && ent->owner == gent->owner)
8627 {
8628 gent->got.refcount = 0;
8629 break;
8630 }
8631
8632 /* If not, then we'll be using our own TPREL entry. */
8633 if (gent->got.refcount != 0)
8634 gent->tls_type = TLS_TLS | TLS_TPREL;
8635 }
8636
8637 /* Remove any list entry that won't generate a word in the GOT before
8638 we call merge_got_entries. Otherwise we risk merging to empty
8639 entries. */
8640 pgent = &h->got.glist;
8641 while ((gent = *pgent) != NULL)
8642 if (gent->got.refcount > 0)
8643 {
8644 if ((gent->tls_type & TLS_LD) != 0
8645 && !h->def_dynamic)
8646 {
8647 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8648 *pgent = gent->next;
8649 }
8650 else
8651 pgent = &gent->next;
8652 }
8653 else
8654 *pgent = gent->next;
8655
8656 if (!htab->do_multi_toc)
8657 merge_got_entries (&h->got.glist);
8658
8659 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8660 if (!gent->is_indirect)
8661 {
8662 /* Make sure this symbol is output as a dynamic symbol.
8663 Undefined weak syms won't yet be marked as dynamic,
8664 nor will all TLS symbols. */
8665 if (h->dynindx == -1
8666 && !h->forced_local
8667 && h->type != STT_GNU_IFUNC
8668 && htab->elf.dynamic_sections_created)
8669 {
8670 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8671 return FALSE;
8672 }
8673
8674 if (!is_ppc64_elf (gent->owner))
8675 abort ();
8676
8677 allocate_got (h, info, gent);
8678 }
8679
8680 if (eh->dyn_relocs == NULL
8681 || (!htab->elf.dynamic_sections_created
8682 && h->type != STT_GNU_IFUNC))
8683 return TRUE;
8684
8685 /* In the shared -Bsymbolic case, discard space allocated for
8686 dynamic pc-relative relocs against symbols which turn out to be
8687 defined in regular objects. For the normal shared case, discard
8688 space for relocs that have become local due to symbol visibility
8689 changes. */
8690
8691 if (info->shared)
8692 {
8693 /* Relocs that use pc_count are those that appear on a call insn,
8694 or certain REL relocs (see must_be_dyn_reloc) that can be
8695 generated via assembly. We want calls to protected symbols to
8696 resolve directly to the function rather than going via the plt.
8697 If people want function pointer comparisons to work as expected
8698 then they should avoid writing weird assembly. */
8699 if (SYMBOL_CALLS_LOCAL (info, h))
8700 {
8701 struct ppc_dyn_relocs **pp;
8702
8703 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8704 {
8705 p->count -= p->pc_count;
8706 p->pc_count = 0;
8707 if (p->count == 0)
8708 *pp = p->next;
8709 else
8710 pp = &p->next;
8711 }
8712 }
8713
8714 /* Also discard relocs on undefined weak syms with non-default
8715 visibility. */
8716 if (eh->dyn_relocs != NULL
8717 && h->root.type == bfd_link_hash_undefweak)
8718 {
8719 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8720 eh->dyn_relocs = NULL;
8721
8722 /* Make sure this symbol is output as a dynamic symbol.
8723 Undefined weak syms won't yet be marked as dynamic. */
8724 else if (h->dynindx == -1
8725 && !h->forced_local)
8726 {
8727 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8728 return FALSE;
8729 }
8730 }
8731 }
8732 else if (h->type == STT_GNU_IFUNC)
8733 {
8734 if (!h->non_got_ref)
8735 eh->dyn_relocs = NULL;
8736 }
8737 else if (ELIMINATE_COPY_RELOCS)
8738 {
8739 /* For the non-shared case, discard space for relocs against
8740 symbols which turn out to need copy relocs or are not
8741 dynamic. */
8742
8743 if (!h->non_got_ref
8744 && !h->def_regular)
8745 {
8746 /* Make sure this symbol is output as a dynamic symbol.
8747 Undefined weak syms won't yet be marked as dynamic. */
8748 if (h->dynindx == -1
8749 && !h->forced_local)
8750 {
8751 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8752 return FALSE;
8753 }
8754
8755 /* If that succeeded, we know we'll be keeping all the
8756 relocs. */
8757 if (h->dynindx != -1)
8758 goto keep;
8759 }
8760
8761 eh->dyn_relocs = NULL;
8762
8763 keep: ;
8764 }
8765
8766 /* Finally, allocate space. */
8767 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8768 {
8769 asection *sreloc = elf_section_data (p->sec)->sreloc;
8770 if (!htab->elf.dynamic_sections_created)
8771 sreloc = htab->reliplt;
8772 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8773 }
8774
8775 return TRUE;
8776 }
8777
8778 /* Find any dynamic relocs that apply to read-only sections. */
8779
8780 static bfd_boolean
8781 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8782 {
8783 struct ppc_link_hash_entry *eh;
8784 struct ppc_dyn_relocs *p;
8785
8786 if (h->root.type == bfd_link_hash_warning)
8787 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8788
8789 eh = (struct ppc_link_hash_entry *) h;
8790 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8791 {
8792 asection *s = p->sec->output_section;
8793
8794 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8795 {
8796 struct bfd_link_info *info = inf;
8797
8798 info->flags |= DF_TEXTREL;
8799
8800 /* Not an error, just cut short the traversal. */
8801 return FALSE;
8802 }
8803 }
8804 return TRUE;
8805 }
8806
8807 /* Set the sizes of the dynamic sections. */
8808
8809 static bfd_boolean
8810 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8811 struct bfd_link_info *info)
8812 {
8813 struct ppc_link_hash_table *htab;
8814 bfd *dynobj;
8815 asection *s;
8816 bfd_boolean relocs;
8817 bfd *ibfd;
8818 struct got_entry *first_tlsld;
8819
8820 htab = ppc_hash_table (info);
8821 if (htab == NULL)
8822 return FALSE;
8823
8824 dynobj = htab->elf.dynobj;
8825 if (dynobj == NULL)
8826 abort ();
8827
8828 if (htab->elf.dynamic_sections_created)
8829 {
8830 /* Set the contents of the .interp section to the interpreter. */
8831 if (info->executable)
8832 {
8833 s = bfd_get_section_by_name (dynobj, ".interp");
8834 if (s == NULL)
8835 abort ();
8836 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8837 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8838 }
8839 }
8840
8841 /* Set up .got offsets for local syms, and space for local dynamic
8842 relocs. */
8843 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8844 {
8845 struct got_entry **lgot_ents;
8846 struct got_entry **end_lgot_ents;
8847 struct plt_entry **local_plt;
8848 struct plt_entry **end_local_plt;
8849 unsigned char *lgot_masks;
8850 bfd_size_type locsymcount;
8851 Elf_Internal_Shdr *symtab_hdr;
8852 asection *srel;
8853
8854 if (!is_ppc64_elf (ibfd))
8855 continue;
8856
8857 for (s = ibfd->sections; s != NULL; s = s->next)
8858 {
8859 struct ppc_dyn_relocs *p;
8860
8861 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8862 {
8863 if (!bfd_is_abs_section (p->sec)
8864 && bfd_is_abs_section (p->sec->output_section))
8865 {
8866 /* Input section has been discarded, either because
8867 it is a copy of a linkonce section or due to
8868 linker script /DISCARD/, so we'll be discarding
8869 the relocs too. */
8870 }
8871 else if (p->count != 0)
8872 {
8873 srel = elf_section_data (p->sec)->sreloc;
8874 if (!htab->elf.dynamic_sections_created)
8875 srel = htab->reliplt;
8876 srel->size += p->count * sizeof (Elf64_External_Rela);
8877 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8878 info->flags |= DF_TEXTREL;
8879 }
8880 }
8881 }
8882
8883 lgot_ents = elf_local_got_ents (ibfd);
8884 if (!lgot_ents)
8885 continue;
8886
8887 symtab_hdr = &elf_symtab_hdr (ibfd);
8888 locsymcount = symtab_hdr->sh_info;
8889 end_lgot_ents = lgot_ents + locsymcount;
8890 local_plt = (struct plt_entry **) end_lgot_ents;
8891 end_local_plt = local_plt + locsymcount;
8892 lgot_masks = (unsigned char *) end_local_plt;
8893 s = ppc64_elf_tdata (ibfd)->got;
8894 srel = ppc64_elf_tdata (ibfd)->relgot;
8895 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8896 {
8897 struct got_entry **pent, *ent;
8898
8899 pent = lgot_ents;
8900 while ((ent = *pent) != NULL)
8901 if (ent->got.refcount > 0)
8902 {
8903 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8904 {
8905 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8906 *pent = ent->next;
8907 }
8908 else
8909 {
8910 unsigned int num = 1;
8911 ent->got.offset = s->size;
8912 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8913 num = 2;
8914 s->size += num * 8;
8915 if (info->shared)
8916 srel->size += num * sizeof (Elf64_External_Rela);
8917 else if ((*lgot_masks & PLT_IFUNC) != 0)
8918 {
8919 htab->reliplt->size
8920 += num * sizeof (Elf64_External_Rela);
8921 htab->got_reli_size
8922 += num * sizeof (Elf64_External_Rela);
8923 }
8924 pent = &ent->next;
8925 }
8926 }
8927 else
8928 *pent = ent->next;
8929 }
8930
8931 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8932 for (; local_plt < end_local_plt; ++local_plt)
8933 {
8934 struct plt_entry *ent;
8935
8936 for (ent = *local_plt; ent != NULL; ent = ent->next)
8937 if (ent->plt.refcount > 0)
8938 {
8939 s = htab->iplt;
8940 ent->plt.offset = s->size;
8941 s->size += PLT_ENTRY_SIZE;
8942
8943 htab->reliplt->size += sizeof (Elf64_External_Rela);
8944 }
8945 else
8946 ent->plt.offset = (bfd_vma) -1;
8947 }
8948 }
8949
8950 /* Allocate global sym .plt and .got entries, and space for global
8951 sym dynamic relocs. */
8952 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8953
8954 first_tlsld = NULL;
8955 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8956 {
8957 struct got_entry *ent;
8958
8959 if (!is_ppc64_elf (ibfd))
8960 continue;
8961
8962 ent = ppc64_tlsld_got (ibfd);
8963 if (ent->got.refcount > 0)
8964 {
8965 if (!htab->do_multi_toc && first_tlsld != NULL)
8966 {
8967 ent->is_indirect = TRUE;
8968 ent->got.ent = first_tlsld;
8969 }
8970 else
8971 {
8972 if (first_tlsld == NULL)
8973 first_tlsld = ent;
8974 s = ppc64_elf_tdata (ibfd)->got;
8975 ent->got.offset = s->size;
8976 ent->owner = ibfd;
8977 s->size += 16;
8978 if (info->shared)
8979 {
8980 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8981 srel->size += sizeof (Elf64_External_Rela);
8982 }
8983 }
8984 }
8985 else
8986 ent->got.offset = (bfd_vma) -1;
8987 }
8988
8989 /* We now have determined the sizes of the various dynamic sections.
8990 Allocate memory for them. */
8991 relocs = FALSE;
8992 for (s = dynobj->sections; s != NULL; s = s->next)
8993 {
8994 if ((s->flags & SEC_LINKER_CREATED) == 0)
8995 continue;
8996
8997 if (s == htab->brlt || s == htab->relbrlt)
8998 /* These haven't been allocated yet; don't strip. */
8999 continue;
9000 else if (s == htab->got
9001 || s == htab->plt
9002 || s == htab->iplt
9003 || s == htab->glink
9004 || s == htab->dynbss)
9005 {
9006 /* Strip this section if we don't need it; see the
9007 comment below. */
9008 }
9009 else if (CONST_STRNEQ (s->name, ".rela"))
9010 {
9011 if (s->size != 0)
9012 {
9013 if (s != htab->relplt)
9014 relocs = TRUE;
9015
9016 /* We use the reloc_count field as a counter if we need
9017 to copy relocs into the output file. */
9018 s->reloc_count = 0;
9019 }
9020 }
9021 else
9022 {
9023 /* It's not one of our sections, so don't allocate space. */
9024 continue;
9025 }
9026
9027 if (s->size == 0)
9028 {
9029 /* If we don't need this section, strip it from the
9030 output file. This is mostly to handle .rela.bss and
9031 .rela.plt. We must create both sections in
9032 create_dynamic_sections, because they must be created
9033 before the linker maps input sections to output
9034 sections. The linker does that before
9035 adjust_dynamic_symbol is called, and it is that
9036 function which decides whether anything needs to go
9037 into these sections. */
9038 s->flags |= SEC_EXCLUDE;
9039 continue;
9040 }
9041
9042 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9043 continue;
9044
9045 /* Allocate memory for the section contents. We use bfd_zalloc
9046 here in case unused entries are not reclaimed before the
9047 section's contents are written out. This should not happen,
9048 but this way if it does we get a R_PPC64_NONE reloc in .rela
9049 sections instead of garbage.
9050 We also rely on the section contents being zero when writing
9051 the GOT. */
9052 s->contents = bfd_zalloc (dynobj, s->size);
9053 if (s->contents == NULL)
9054 return FALSE;
9055 }
9056
9057 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9058 {
9059 if (!is_ppc64_elf (ibfd))
9060 continue;
9061
9062 s = ppc64_elf_tdata (ibfd)->got;
9063 if (s != NULL && s != htab->got)
9064 {
9065 if (s->size == 0)
9066 s->flags |= SEC_EXCLUDE;
9067 else
9068 {
9069 s->contents = bfd_zalloc (ibfd, s->size);
9070 if (s->contents == NULL)
9071 return FALSE;
9072 }
9073 }
9074 s = ppc64_elf_tdata (ibfd)->relgot;
9075 if (s != NULL)
9076 {
9077 if (s->size == 0)
9078 s->flags |= SEC_EXCLUDE;
9079 else
9080 {
9081 s->contents = bfd_zalloc (ibfd, s->size);
9082 if (s->contents == NULL)
9083 return FALSE;
9084 relocs = TRUE;
9085 s->reloc_count = 0;
9086 }
9087 }
9088 }
9089
9090 if (htab->elf.dynamic_sections_created)
9091 {
9092 /* Add some entries to the .dynamic section. We fill in the
9093 values later, in ppc64_elf_finish_dynamic_sections, but we
9094 must add the entries now so that we get the correct size for
9095 the .dynamic section. The DT_DEBUG entry is filled in by the
9096 dynamic linker and used by the debugger. */
9097 #define add_dynamic_entry(TAG, VAL) \
9098 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9099
9100 if (info->executable)
9101 {
9102 if (!add_dynamic_entry (DT_DEBUG, 0))
9103 return FALSE;
9104 }
9105
9106 if (htab->plt != NULL && htab->plt->size != 0)
9107 {
9108 if (!add_dynamic_entry (DT_PLTGOT, 0)
9109 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9110 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9111 || !add_dynamic_entry (DT_JMPREL, 0)
9112 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9113 return FALSE;
9114 }
9115
9116 if (NO_OPD_RELOCS)
9117 {
9118 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9119 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9120 return FALSE;
9121 }
9122
9123 if (!htab->no_tls_get_addr_opt
9124 && htab->tls_get_addr_fd != NULL
9125 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9126 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9127 return FALSE;
9128
9129 if (relocs)
9130 {
9131 if (!add_dynamic_entry (DT_RELA, 0)
9132 || !add_dynamic_entry (DT_RELASZ, 0)
9133 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9134 return FALSE;
9135
9136 /* If any dynamic relocs apply to a read-only section,
9137 then we need a DT_TEXTREL entry. */
9138 if ((info->flags & DF_TEXTREL) == 0)
9139 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9140
9141 if ((info->flags & DF_TEXTREL) != 0)
9142 {
9143 if (!add_dynamic_entry (DT_TEXTREL, 0))
9144 return FALSE;
9145 }
9146 }
9147 }
9148 #undef add_dynamic_entry
9149
9150 return TRUE;
9151 }
9152
9153 /* Determine the type of stub needed, if any, for a call. */
9154
9155 static inline enum ppc_stub_type
9156 ppc_type_of_stub (asection *input_sec,
9157 const Elf_Internal_Rela *rel,
9158 struct ppc_link_hash_entry **hash,
9159 struct plt_entry **plt_ent,
9160 bfd_vma destination)
9161 {
9162 struct ppc_link_hash_entry *h = *hash;
9163 bfd_vma location;
9164 bfd_vma branch_offset;
9165 bfd_vma max_branch_offset;
9166 enum elf_ppc64_reloc_type r_type;
9167
9168 if (h != NULL)
9169 {
9170 struct plt_entry *ent;
9171 struct ppc_link_hash_entry *fdh = h;
9172 if (h->oh != NULL
9173 && h->oh->is_func_descriptor)
9174 {
9175 fdh = ppc_follow_link (h->oh);
9176 *hash = fdh;
9177 }
9178
9179 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9180 if (ent->addend == rel->r_addend
9181 && ent->plt.offset != (bfd_vma) -1)
9182 {
9183 *plt_ent = ent;
9184 return ppc_stub_plt_call;
9185 }
9186
9187 /* Here, we know we don't have a plt entry. If we don't have a
9188 either a defined function descriptor or a defined entry symbol
9189 in a regular object file, then it is pointless trying to make
9190 any other type of stub. */
9191 if (!is_static_defined (&fdh->elf)
9192 && !is_static_defined (&h->elf))
9193 return ppc_stub_none;
9194 }
9195 else if (elf_local_got_ents (input_sec->owner) != NULL)
9196 {
9197 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9198 struct plt_entry **local_plt = (struct plt_entry **)
9199 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9200 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9201
9202 if (local_plt[r_symndx] != NULL)
9203 {
9204 struct plt_entry *ent;
9205
9206 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9207 if (ent->addend == rel->r_addend
9208 && ent->plt.offset != (bfd_vma) -1)
9209 {
9210 *plt_ent = ent;
9211 return ppc_stub_plt_call;
9212 }
9213 }
9214 }
9215
9216 /* Determine where the call point is. */
9217 location = (input_sec->output_offset
9218 + input_sec->output_section->vma
9219 + rel->r_offset);
9220
9221 branch_offset = destination - location;
9222 r_type = ELF64_R_TYPE (rel->r_info);
9223
9224 /* Determine if a long branch stub is needed. */
9225 max_branch_offset = 1 << 25;
9226 if (r_type != R_PPC64_REL24)
9227 max_branch_offset = 1 << 15;
9228
9229 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9230 /* We need a stub. Figure out whether a long_branch or plt_branch
9231 is needed later. */
9232 return ppc_stub_long_branch;
9233
9234 return ppc_stub_none;
9235 }
9236
9237 /* Build a .plt call stub. */
9238
9239 static inline bfd_byte *
9240 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9241 {
9242 #define PPC_LO(v) ((v) & 0xffff)
9243 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9244 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9245
9246 if (PPC_HA (offset) != 0)
9247 {
9248 if (r != NULL)
9249 {
9250 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9251 r[1].r_offset = r[0].r_offset + 8;
9252 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9253 r[1].r_addend = r[0].r_addend;
9254 if (PPC_HA (offset + 16) != PPC_HA (offset))
9255 {
9256 r[2].r_offset = r[1].r_offset + 4;
9257 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9258 r[2].r_addend = r[0].r_addend;
9259 }
9260 else
9261 {
9262 r[2].r_offset = r[1].r_offset + 8;
9263 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9264 r[2].r_addend = r[0].r_addend + 8;
9265 r[3].r_offset = r[2].r_offset + 4;
9266 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9267 r[3].r_addend = r[0].r_addend + 16;
9268 }
9269 }
9270 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9271 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9272 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9273 if (PPC_HA (offset + 16) != PPC_HA (offset))
9274 {
9275 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9276 offset = 0;
9277 }
9278 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9279 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9280 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9281 bfd_put_32 (obfd, BCTR, p), p += 4;
9282 }
9283 else
9284 {
9285 if (r != NULL)
9286 {
9287 r[0].r_offset += 4;
9288 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9289 if (PPC_HA (offset + 16) != PPC_HA (offset))
9290 {
9291 r[1].r_offset = r[0].r_offset + 4;
9292 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9293 r[1].r_addend = r[0].r_addend;
9294 }
9295 else
9296 {
9297 r[1].r_offset = r[0].r_offset + 8;
9298 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9299 r[1].r_addend = r[0].r_addend + 16;
9300 r[2].r_offset = r[1].r_offset + 4;
9301 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9302 r[2].r_addend = r[0].r_addend + 8;
9303 }
9304 }
9305 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9306 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9307 if (PPC_HA (offset + 16) != PPC_HA (offset))
9308 {
9309 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9310 offset = 0;
9311 }
9312 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9313 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9314 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9315 bfd_put_32 (obfd, BCTR, p), p += 4;
9316 }
9317 return p;
9318 }
9319
9320 /* Build a special .plt call stub for __tls_get_addr. */
9321
9322 #define LD_R11_0R3 0xe9630000
9323 #define LD_R12_0R3 0xe9830000
9324 #define MR_R0_R3 0x7c601b78
9325 #define CMPDI_R11_0 0x2c2b0000
9326 #define ADD_R3_R12_R13 0x7c6c6a14
9327 #define BEQLR 0x4d820020
9328 #define MR_R3_R0 0x7c030378
9329 #define MFLR_R11 0x7d6802a6
9330 #define STD_R11_0R1 0xf9610000
9331 #define BCTRL 0x4e800421
9332 #define LD_R11_0R1 0xe9610000
9333 #define LD_R2_0R1 0xe8410000
9334 #define MTLR_R11 0x7d6803a6
9335
9336 static inline bfd_byte *
9337 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9338 Elf_Internal_Rela *r)
9339 {
9340 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9341 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9342 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9343 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9344 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9345 bfd_put_32 (obfd, BEQLR, p), p += 4;
9346 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9347 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9348 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9349
9350 if (r != NULL)
9351 r[0].r_offset += 9 * 4;
9352 p = build_plt_stub (obfd, p, offset, r);
9353 bfd_put_32 (obfd, BCTRL, p - 4);
9354
9355 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9356 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9357 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9358 bfd_put_32 (obfd, BLR, p), p += 4;
9359
9360 return p;
9361 }
9362
9363 static Elf_Internal_Rela *
9364 get_relocs (asection *sec, int count)
9365 {
9366 Elf_Internal_Rela *relocs;
9367 struct bfd_elf_section_data *elfsec_data;
9368
9369 elfsec_data = elf_section_data (sec);
9370 relocs = elfsec_data->relocs;
9371 if (relocs == NULL)
9372 {
9373 bfd_size_type relsize;
9374 relsize = sec->reloc_count * sizeof (*relocs);
9375 relocs = bfd_alloc (sec->owner, relsize);
9376 if (relocs == NULL)
9377 return NULL;
9378 elfsec_data->relocs = relocs;
9379 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9380 * sizeof (Elf64_External_Rela));
9381 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9382 sec->reloc_count = 0;
9383 }
9384 relocs += sec->reloc_count;
9385 sec->reloc_count += count;
9386 return relocs;
9387 }
9388
9389 static bfd_boolean
9390 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9391 {
9392 struct ppc_stub_hash_entry *stub_entry;
9393 struct ppc_branch_hash_entry *br_entry;
9394 struct bfd_link_info *info;
9395 struct ppc_link_hash_table *htab;
9396 bfd_byte *loc;
9397 bfd_byte *p;
9398 bfd_vma dest, off;
9399 int size;
9400 Elf_Internal_Rela *r;
9401 asection *plt;
9402
9403 /* Massage our args to the form they really have. */
9404 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9405 info = in_arg;
9406
9407 htab = ppc_hash_table (info);
9408 if (htab == NULL)
9409 return FALSE;
9410
9411 /* Make a note of the offset within the stubs for this entry. */
9412 stub_entry->stub_offset = stub_entry->stub_sec->size;
9413 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9414
9415 htab->stub_count[stub_entry->stub_type - 1] += 1;
9416 switch (stub_entry->stub_type)
9417 {
9418 case ppc_stub_long_branch:
9419 case ppc_stub_long_branch_r2off:
9420 /* Branches are relative. This is where we are going to. */
9421 off = dest = (stub_entry->target_value
9422 + stub_entry->target_section->output_offset
9423 + stub_entry->target_section->output_section->vma);
9424
9425 /* And this is where we are coming from. */
9426 off -= (stub_entry->stub_offset
9427 + stub_entry->stub_sec->output_offset
9428 + stub_entry->stub_sec->output_section->vma);
9429
9430 size = 4;
9431 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9432 {
9433 bfd_vma r2off;
9434
9435 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9436 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9437 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9438 loc += 4;
9439 size = 12;
9440 if (PPC_HA (r2off) != 0)
9441 {
9442 size = 16;
9443 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9444 loc += 4;
9445 }
9446 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9447 loc += 4;
9448 off -= size - 4;
9449 }
9450 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9451
9452 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9453 {
9454 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9455 stub_entry->root.string);
9456 htab->stub_error = TRUE;
9457 return FALSE;
9458 }
9459
9460 if (info->emitrelocations)
9461 {
9462 r = get_relocs (stub_entry->stub_sec, 1);
9463 if (r == NULL)
9464 return FALSE;
9465 r->r_offset = loc - stub_entry->stub_sec->contents;
9466 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9467 r->r_addend = dest;
9468 if (stub_entry->h != NULL)
9469 {
9470 struct elf_link_hash_entry **hashes;
9471 unsigned long symndx;
9472 struct ppc_link_hash_entry *h;
9473
9474 hashes = elf_sym_hashes (htab->stub_bfd);
9475 if (hashes == NULL)
9476 {
9477 bfd_size_type hsize;
9478
9479 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9480 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9481 if (hashes == NULL)
9482 return FALSE;
9483 elf_sym_hashes (htab->stub_bfd) = hashes;
9484 htab->stub_globals = 1;
9485 }
9486 symndx = htab->stub_globals++;
9487 h = stub_entry->h;
9488 hashes[symndx] = &h->elf;
9489 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9490 if (h->oh != NULL && h->oh->is_func)
9491 h = ppc_follow_link (h->oh);
9492 if (h->elf.root.u.def.section != stub_entry->target_section)
9493 /* H is an opd symbol. The addend must be zero. */
9494 r->r_addend = 0;
9495 else
9496 {
9497 off = (h->elf.root.u.def.value
9498 + h->elf.root.u.def.section->output_offset
9499 + h->elf.root.u.def.section->output_section->vma);
9500 r->r_addend -= off;
9501 }
9502 }
9503 }
9504 break;
9505
9506 case ppc_stub_plt_branch:
9507 case ppc_stub_plt_branch_r2off:
9508 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9509 stub_entry->root.string + 9,
9510 FALSE, FALSE);
9511 if (br_entry == NULL)
9512 {
9513 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9514 stub_entry->root.string);
9515 htab->stub_error = TRUE;
9516 return FALSE;
9517 }
9518
9519 dest = (stub_entry->target_value
9520 + stub_entry->target_section->output_offset
9521 + stub_entry->target_section->output_section->vma);
9522
9523 bfd_put_64 (htab->brlt->owner, dest,
9524 htab->brlt->contents + br_entry->offset);
9525
9526 if (br_entry->iter == htab->stub_iteration)
9527 {
9528 br_entry->iter = 0;
9529
9530 if (htab->relbrlt != NULL)
9531 {
9532 /* Create a reloc for the branch lookup table entry. */
9533 Elf_Internal_Rela rela;
9534 bfd_byte *rl;
9535
9536 rela.r_offset = (br_entry->offset
9537 + htab->brlt->output_offset
9538 + htab->brlt->output_section->vma);
9539 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9540 rela.r_addend = dest;
9541
9542 rl = htab->relbrlt->contents;
9543 rl += (htab->relbrlt->reloc_count++
9544 * sizeof (Elf64_External_Rela));
9545 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9546 }
9547 else if (info->emitrelocations)
9548 {
9549 r = get_relocs (htab->brlt, 1);
9550 if (r == NULL)
9551 return FALSE;
9552 /* brlt, being SEC_LINKER_CREATED does not go through the
9553 normal reloc processing. Symbols and offsets are not
9554 translated from input file to output file form, so
9555 set up the offset per the output file. */
9556 r->r_offset = (br_entry->offset
9557 + htab->brlt->output_offset
9558 + htab->brlt->output_section->vma);
9559 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9560 r->r_addend = dest;
9561 }
9562 }
9563
9564 dest = (br_entry->offset
9565 + htab->brlt->output_offset
9566 + htab->brlt->output_section->vma);
9567
9568 off = (dest
9569 - elf_gp (htab->brlt->output_section->owner)
9570 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9571
9572 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9573 {
9574 (*_bfd_error_handler)
9575 (_("linkage table error against `%s'"),
9576 stub_entry->root.string);
9577 bfd_set_error (bfd_error_bad_value);
9578 htab->stub_error = TRUE;
9579 return FALSE;
9580 }
9581
9582 if (info->emitrelocations)
9583 {
9584 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9585 if (r == NULL)
9586 return FALSE;
9587 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9588 if (bfd_big_endian (info->output_bfd))
9589 r[0].r_offset += 2;
9590 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9591 r[0].r_offset += 4;
9592 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9593 r[0].r_addend = dest;
9594 if (PPC_HA (off) != 0)
9595 {
9596 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9597 r[1].r_offset = r[0].r_offset + 4;
9598 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9599 r[1].r_addend = r[0].r_addend;
9600 }
9601 }
9602
9603 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9604 {
9605 if (PPC_HA (off) != 0)
9606 {
9607 size = 16;
9608 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9609 loc += 4;
9610 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9611 }
9612 else
9613 {
9614 size = 12;
9615 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9616 }
9617 }
9618 else
9619 {
9620 bfd_vma r2off;
9621
9622 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9623 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9624 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9625 loc += 4;
9626 size = 20;
9627 if (PPC_HA (off) != 0)
9628 {
9629 size += 4;
9630 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9631 loc += 4;
9632 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9633 loc += 4;
9634 }
9635 else
9636 {
9637 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9638 loc += 4;
9639 }
9640
9641 if (PPC_HA (r2off) != 0)
9642 {
9643 size += 4;
9644 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9645 loc += 4;
9646 }
9647 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9648 }
9649 loc += 4;
9650 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9651 loc += 4;
9652 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9653 break;
9654
9655 case ppc_stub_plt_call:
9656 if (stub_entry->h != NULL
9657 && stub_entry->h->is_func_descriptor
9658 && stub_entry->h->oh != NULL)
9659 {
9660 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9661
9662 /* If the old-ABI "dot-symbol" is undefined make it weak so
9663 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9664 FIXME: We used to define the symbol on one of the call
9665 stubs instead, which is why we test symbol section id
9666 against htab->top_id in various places. Likely all
9667 these checks could now disappear. */
9668 if (fh->elf.root.type == bfd_link_hash_undefined)
9669 fh->elf.root.type = bfd_link_hash_undefweak;
9670 }
9671
9672 /* Now build the stub. */
9673 dest = stub_entry->plt_ent->plt.offset & ~1;
9674 if (dest >= (bfd_vma) -2)
9675 abort ();
9676
9677 plt = htab->plt;
9678 if (!htab->elf.dynamic_sections_created
9679 || stub_entry->h == NULL
9680 || stub_entry->h->elf.dynindx == -1)
9681 plt = htab->iplt;
9682
9683 dest += plt->output_offset + plt->output_section->vma;
9684
9685 if (stub_entry->h == NULL
9686 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9687 {
9688 Elf_Internal_Rela rela;
9689 bfd_byte *rl;
9690
9691 rela.r_offset = dest;
9692 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9693 rela.r_addend = (stub_entry->target_value
9694 + stub_entry->target_section->output_offset
9695 + stub_entry->target_section->output_section->vma);
9696
9697 rl = (htab->reliplt->contents
9698 + (htab->reliplt->reloc_count++
9699 * sizeof (Elf64_External_Rela)));
9700 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9701 stub_entry->plt_ent->plt.offset |= 1;
9702 }
9703
9704 off = (dest
9705 - elf_gp (plt->output_section->owner)
9706 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9707
9708 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9709 {
9710 (*_bfd_error_handler)
9711 (_("linkage table error against `%s'"),
9712 stub_entry->h != NULL
9713 ? stub_entry->h->elf.root.root.string
9714 : "<local sym>");
9715 bfd_set_error (bfd_error_bad_value);
9716 htab->stub_error = TRUE;
9717 return FALSE;
9718 }
9719
9720 r = NULL;
9721 if (info->emitrelocations)
9722 {
9723 r = get_relocs (stub_entry->stub_sec,
9724 (2 + (PPC_HA (off) != 0)
9725 + (PPC_HA (off + 16) == PPC_HA (off))));
9726 if (r == NULL)
9727 return FALSE;
9728 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9729 if (bfd_big_endian (info->output_bfd))
9730 r[0].r_offset += 2;
9731 r[0].r_addend = dest;
9732 }
9733 if (stub_entry->h != NULL
9734 && (stub_entry->h == htab->tls_get_addr_fd
9735 || stub_entry->h == htab->tls_get_addr)
9736 && !htab->no_tls_get_addr_opt)
9737 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9738 else
9739 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9740 size = p - loc;
9741 break;
9742
9743 default:
9744 BFD_FAIL ();
9745 return FALSE;
9746 }
9747
9748 stub_entry->stub_sec->size += size;
9749
9750 if (htab->emit_stub_syms)
9751 {
9752 struct elf_link_hash_entry *h;
9753 size_t len1, len2;
9754 char *name;
9755 const char *const stub_str[] = { "long_branch",
9756 "long_branch_r2off",
9757 "plt_branch",
9758 "plt_branch_r2off",
9759 "plt_call" };
9760
9761 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9762 len2 = strlen (stub_entry->root.string);
9763 name = bfd_malloc (len1 + len2 + 2);
9764 if (name == NULL)
9765 return FALSE;
9766 memcpy (name, stub_entry->root.string, 9);
9767 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9768 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9769 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9770 if (h == NULL)
9771 return FALSE;
9772 if (h->root.type == bfd_link_hash_new)
9773 {
9774 h->root.type = bfd_link_hash_defined;
9775 h->root.u.def.section = stub_entry->stub_sec;
9776 h->root.u.def.value = stub_entry->stub_offset;
9777 h->ref_regular = 1;
9778 h->def_regular = 1;
9779 h->ref_regular_nonweak = 1;
9780 h->forced_local = 1;
9781 h->non_elf = 0;
9782 }
9783 }
9784
9785 return TRUE;
9786 }
9787
9788 /* As above, but don't actually build the stub. Just bump offset so
9789 we know stub section sizes, and select plt_branch stubs where
9790 long_branch stubs won't do. */
9791
9792 static bfd_boolean
9793 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9794 {
9795 struct ppc_stub_hash_entry *stub_entry;
9796 struct bfd_link_info *info;
9797 struct ppc_link_hash_table *htab;
9798 bfd_vma off;
9799 int size;
9800
9801 /* Massage our args to the form they really have. */
9802 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9803 info = in_arg;
9804
9805 htab = ppc_hash_table (info);
9806 if (htab == NULL)
9807 return FALSE;
9808
9809 if (stub_entry->stub_type == ppc_stub_plt_call)
9810 {
9811 asection *plt;
9812 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9813 if (off >= (bfd_vma) -2)
9814 abort ();
9815 plt = htab->plt;
9816 if (!htab->elf.dynamic_sections_created
9817 || stub_entry->h == NULL
9818 || stub_entry->h->elf.dynindx == -1)
9819 plt = htab->iplt;
9820 off += (plt->output_offset
9821 + plt->output_section->vma
9822 - elf_gp (plt->output_section->owner)
9823 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9824
9825 size = PLT_CALL_STUB_SIZE;
9826 if (PPC_HA (off) == 0)
9827 size -= 4;
9828 if (PPC_HA (off + 16) != PPC_HA (off))
9829 size += 4;
9830 if (stub_entry->h != NULL
9831 && (stub_entry->h == htab->tls_get_addr_fd
9832 || stub_entry->h == htab->tls_get_addr)
9833 && !htab->no_tls_get_addr_opt)
9834 size += 13 * 4;
9835 if (info->emitrelocations)
9836 {
9837 stub_entry->stub_sec->reloc_count
9838 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9839 stub_entry->stub_sec->flags |= SEC_RELOC;
9840 }
9841 }
9842 else
9843 {
9844 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9845 variants. */
9846 bfd_vma r2off = 0;
9847
9848 off = (stub_entry->target_value
9849 + stub_entry->target_section->output_offset
9850 + stub_entry->target_section->output_section->vma);
9851 off -= (stub_entry->stub_sec->size
9852 + stub_entry->stub_sec->output_offset
9853 + stub_entry->stub_sec->output_section->vma);
9854
9855 /* Reset the stub type from the plt variant in case we now
9856 can reach with a shorter stub. */
9857 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9858 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9859
9860 size = 4;
9861 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9862 {
9863 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9864 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9865 size = 12;
9866 if (PPC_HA (r2off) != 0)
9867 size = 16;
9868 off -= size - 4;
9869 }
9870
9871 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9872 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9873 {
9874 struct ppc_branch_hash_entry *br_entry;
9875
9876 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9877 stub_entry->root.string + 9,
9878 TRUE, FALSE);
9879 if (br_entry == NULL)
9880 {
9881 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9882 stub_entry->root.string);
9883 htab->stub_error = TRUE;
9884 return FALSE;
9885 }
9886
9887 if (br_entry->iter != htab->stub_iteration)
9888 {
9889 br_entry->iter = htab->stub_iteration;
9890 br_entry->offset = htab->brlt->size;
9891 htab->brlt->size += 8;
9892
9893 if (htab->relbrlt != NULL)
9894 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9895 else if (info->emitrelocations)
9896 {
9897 htab->brlt->reloc_count += 1;
9898 htab->brlt->flags |= SEC_RELOC;
9899 }
9900 }
9901
9902 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9903 off = (br_entry->offset
9904 + htab->brlt->output_offset
9905 + htab->brlt->output_section->vma
9906 - elf_gp (htab->brlt->output_section->owner)
9907 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9908
9909 if (info->emitrelocations)
9910 {
9911 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9912 stub_entry->stub_sec->flags |= SEC_RELOC;
9913 }
9914
9915 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9916 {
9917 size = 12;
9918 if (PPC_HA (off) != 0)
9919 size = 16;
9920 }
9921 else
9922 {
9923 size = 20;
9924 if (PPC_HA (off) != 0)
9925 size += 4;
9926
9927 if (PPC_HA (r2off) != 0)
9928 size += 4;
9929 }
9930 }
9931 else if (info->emitrelocations)
9932 {
9933 stub_entry->stub_sec->reloc_count += 1;
9934 stub_entry->stub_sec->flags |= SEC_RELOC;
9935 }
9936 }
9937
9938 stub_entry->stub_sec->size += size;
9939 return TRUE;
9940 }
9941
9942 /* Set up various things so that we can make a list of input sections
9943 for each output section included in the link. Returns -1 on error,
9944 0 when no stubs will be needed, and 1 on success. */
9945
9946 int
9947 ppc64_elf_setup_section_lists
9948 (struct bfd_link_info *info,
9949 asection *(*add_stub_section) (const char *, asection *),
9950 void (*layout_sections_again) (void))
9951 {
9952 bfd *input_bfd;
9953 int top_id, top_index, id;
9954 asection *section;
9955 asection **input_list;
9956 bfd_size_type amt;
9957 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9958
9959 if (htab == NULL)
9960 return -1;
9961 /* Stash our params away. */
9962 htab->add_stub_section = add_stub_section;
9963 htab->layout_sections_again = layout_sections_again;
9964
9965 if (htab->brlt == NULL)
9966 return 0;
9967
9968 /* Find the top input section id. */
9969 for (input_bfd = info->input_bfds, top_id = 3;
9970 input_bfd != NULL;
9971 input_bfd = input_bfd->link_next)
9972 {
9973 for (section = input_bfd->sections;
9974 section != NULL;
9975 section = section->next)
9976 {
9977 if (top_id < section->id)
9978 top_id = section->id;
9979 }
9980 }
9981
9982 htab->top_id = top_id;
9983 amt = sizeof (struct map_stub) * (top_id + 1);
9984 htab->stub_group = bfd_zmalloc (amt);
9985 if (htab->stub_group == NULL)
9986 return -1;
9987
9988 /* Set toc_off for com, und, abs and ind sections. */
9989 for (id = 0; id < 3; id++)
9990 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9991
9992 /* We can't use output_bfd->section_count here to find the top output
9993 section index as some sections may have been removed, and
9994 strip_excluded_output_sections doesn't renumber the indices. */
9995 for (section = info->output_bfd->sections, top_index = 0;
9996 section != NULL;
9997 section = section->next)
9998 {
9999 if (top_index < section->index)
10000 top_index = section->index;
10001 }
10002
10003 htab->top_index = top_index;
10004 amt = sizeof (asection *) * (top_index + 1);
10005 input_list = bfd_zmalloc (amt);
10006 htab->input_list = input_list;
10007 if (input_list == NULL)
10008 return -1;
10009
10010 return 1;
10011 }
10012
10013 /* Set up for first pass at multitoc partitioning. */
10014
10015 void
10016 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10017 {
10018 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10019
10020 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10021 htab->toc_curr = elf_gp (info->output_bfd);
10022 htab->toc_bfd = NULL;
10023 htab->toc_first_sec = NULL;
10024 }
10025
10026 /* The linker repeatedly calls this function for each TOC input section
10027 and linker generated GOT section. Group input bfds such that the toc
10028 within a group is less than 64k in size. */
10029
10030 bfd_boolean
10031 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10032 {
10033 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10034 bfd_vma addr, off, limit;
10035
10036 if (htab == NULL)
10037 return FALSE;
10038
10039 if (!htab->second_toc_pass)
10040 {
10041 /* Keep track of the first .toc or .got section for this input bfd. */
10042 if (htab->toc_bfd != isec->owner)
10043 {
10044 htab->toc_bfd = isec->owner;
10045 htab->toc_first_sec = isec;
10046 }
10047
10048 addr = isec->output_offset + isec->output_section->vma;
10049 off = addr - htab->toc_curr;
10050 limit = 0x80008000;
10051 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10052 limit = 0x10000;
10053 if (off + isec->size > limit)
10054 {
10055 addr = (htab->toc_first_sec->output_offset
10056 + htab->toc_first_sec->output_section->vma);
10057 htab->toc_curr = addr;
10058 }
10059
10060 /* toc_curr is the base address of this toc group. Set elf_gp
10061 for the input section to be the offset relative to the
10062 output toc base plus 0x8000. Making the input elf_gp an
10063 offset allows us to move the toc as a whole without
10064 recalculating input elf_gp. */
10065 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10066 off += TOC_BASE_OFF;
10067
10068 /* Die if someone uses a linker script that doesn't keep input
10069 file .toc and .got together. */
10070 if (elf_gp (isec->owner) != 0
10071 && elf_gp (isec->owner) != off)
10072 return FALSE;
10073
10074 elf_gp (isec->owner) = off;
10075 return TRUE;
10076 }
10077
10078 /* During the second pass toc_first_sec points to the start of
10079 a toc group, and toc_curr is used to track the old elf_gp.
10080 We use toc_bfd to ensure we only look at each bfd once. */
10081 if (htab->toc_bfd == isec->owner)
10082 return TRUE;
10083 htab->toc_bfd = isec->owner;
10084
10085 if (htab->toc_first_sec == NULL
10086 || htab->toc_curr != elf_gp (isec->owner))
10087 {
10088 htab->toc_curr = elf_gp (isec->owner);
10089 htab->toc_first_sec = isec;
10090 }
10091 addr = (htab->toc_first_sec->output_offset
10092 + htab->toc_first_sec->output_section->vma);
10093 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10094 elf_gp (isec->owner) = off;
10095
10096 return TRUE;
10097 }
10098
10099 /* Called via elf_link_hash_traverse to merge GOT entries for global
10100 symbol H. */
10101
10102 static bfd_boolean
10103 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10104 {
10105 if (h->root.type == bfd_link_hash_indirect)
10106 return TRUE;
10107
10108 if (h->root.type == bfd_link_hash_warning)
10109 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10110
10111 merge_got_entries (&h->got.glist);
10112
10113 return TRUE;
10114 }
10115
10116 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10117 symbol H. */
10118
10119 static bfd_boolean
10120 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10121 {
10122 struct got_entry *gent;
10123
10124 if (h->root.type == bfd_link_hash_indirect)
10125 return TRUE;
10126
10127 if (h->root.type == bfd_link_hash_warning)
10128 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10129
10130 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10131 if (!gent->is_indirect)
10132 allocate_got (h, (struct bfd_link_info *) inf, gent);
10133 return TRUE;
10134 }
10135
10136 /* Called on the first multitoc pass after the last call to
10137 ppc64_elf_next_toc_section. This function removes duplicate GOT
10138 entries. */
10139
10140 bfd_boolean
10141 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10142 {
10143 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10144 struct bfd *ibfd, *ibfd2;
10145 bfd_boolean done_something;
10146
10147 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10148
10149 if (!htab->do_multi_toc)
10150 return FALSE;
10151
10152 /* Merge global sym got entries within a toc group. */
10153 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10154
10155 /* And tlsld_got. */
10156 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10157 {
10158 struct got_entry *ent, *ent2;
10159
10160 if (!is_ppc64_elf (ibfd))
10161 continue;
10162
10163 ent = ppc64_tlsld_got (ibfd);
10164 if (!ent->is_indirect
10165 && ent->got.offset != (bfd_vma) -1)
10166 {
10167 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10168 {
10169 if (!is_ppc64_elf (ibfd2))
10170 continue;
10171
10172 ent2 = ppc64_tlsld_got (ibfd2);
10173 if (!ent2->is_indirect
10174 && ent2->got.offset != (bfd_vma) -1
10175 && elf_gp (ibfd2) == elf_gp (ibfd))
10176 {
10177 ent2->is_indirect = TRUE;
10178 ent2->got.ent = ent;
10179 }
10180 }
10181 }
10182 }
10183
10184 /* Zap sizes of got sections. */
10185 htab->reliplt->rawsize = htab->reliplt->size;
10186 htab->reliplt->size -= htab->got_reli_size;
10187 htab->got_reli_size = 0;
10188
10189 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10190 {
10191 asection *got, *relgot;
10192
10193 if (!is_ppc64_elf (ibfd))
10194 continue;
10195
10196 got = ppc64_elf_tdata (ibfd)->got;
10197 if (got != NULL)
10198 {
10199 got->rawsize = got->size;
10200 got->size = 0;
10201 relgot = ppc64_elf_tdata (ibfd)->relgot;
10202 relgot->rawsize = relgot->size;
10203 relgot->size = 0;
10204 }
10205 }
10206
10207 /* Now reallocate the got, local syms first. We don't need to
10208 allocate section contents again since we never increase size. */
10209 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10210 {
10211 struct got_entry **lgot_ents;
10212 struct got_entry **end_lgot_ents;
10213 struct plt_entry **local_plt;
10214 struct plt_entry **end_local_plt;
10215 unsigned char *lgot_masks;
10216 bfd_size_type locsymcount;
10217 Elf_Internal_Shdr *symtab_hdr;
10218 asection *s, *srel;
10219
10220 if (!is_ppc64_elf (ibfd))
10221 continue;
10222
10223 lgot_ents = elf_local_got_ents (ibfd);
10224 if (!lgot_ents)
10225 continue;
10226
10227 symtab_hdr = &elf_symtab_hdr (ibfd);
10228 locsymcount = symtab_hdr->sh_info;
10229 end_lgot_ents = lgot_ents + locsymcount;
10230 local_plt = (struct plt_entry **) end_lgot_ents;
10231 end_local_plt = local_plt + locsymcount;
10232 lgot_masks = (unsigned char *) end_local_plt;
10233 s = ppc64_elf_tdata (ibfd)->got;
10234 srel = ppc64_elf_tdata (ibfd)->relgot;
10235 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10236 {
10237 struct got_entry *ent;
10238
10239 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10240 {
10241 unsigned int num = 1;
10242 ent->got.offset = s->size;
10243 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10244 num = 2;
10245 s->size += num * 8;
10246 if (info->shared)
10247 srel->size += num * sizeof (Elf64_External_Rela);
10248 else if ((*lgot_masks & PLT_IFUNC) != 0)
10249 {
10250 htab->reliplt->size
10251 += num * sizeof (Elf64_External_Rela);
10252 htab->got_reli_size
10253 += num * sizeof (Elf64_External_Rela);
10254 }
10255 }
10256 }
10257 }
10258
10259 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10260
10261 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10262 {
10263 struct got_entry *ent;
10264
10265 if (!is_ppc64_elf (ibfd))
10266 continue;
10267
10268 ent = ppc64_tlsld_got (ibfd);
10269 if (!ent->is_indirect
10270 && ent->got.offset != (bfd_vma) -1)
10271 {
10272 asection *s = ppc64_elf_tdata (ibfd)->got;
10273 ent->got.offset = s->size;
10274 s->size += 16;
10275 if (info->shared)
10276 {
10277 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10278 srel->size += sizeof (Elf64_External_Rela);
10279 }
10280 }
10281 }
10282
10283 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10284 if (!done_something)
10285 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10286 {
10287 asection *got;
10288
10289 if (!is_ppc64_elf (ibfd))
10290 continue;
10291
10292 got = ppc64_elf_tdata (ibfd)->got;
10293 if (got != NULL)
10294 {
10295 done_something = got->rawsize != got->size;
10296 if (done_something)
10297 break;
10298 }
10299 }
10300
10301 if (done_something)
10302 (*htab->layout_sections_again) ();
10303
10304 /* Set up for second pass over toc sections to recalculate elf_gp
10305 on input sections. */
10306 htab->toc_bfd = NULL;
10307 htab->toc_first_sec = NULL;
10308 htab->second_toc_pass = TRUE;
10309 return done_something;
10310 }
10311
10312 /* Called after second pass of multitoc partitioning. */
10313
10314 void
10315 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10316 {
10317 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10318
10319 /* After the second pass, toc_curr tracks the TOC offset used
10320 for code sections below in ppc64_elf_next_input_section. */
10321 htab->toc_curr = TOC_BASE_OFF;
10322 }
10323
10324 /* No toc references were found in ISEC. If the code in ISEC makes no
10325 calls, then there's no need to use toc adjusting stubs when branching
10326 into ISEC. Actually, indirect calls from ISEC are OK as they will
10327 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10328 needed, and 2 if a cyclical call-graph was found but no other reason
10329 for a stub was detected. If called from the top level, a return of
10330 2 means the same as a return of 0. */
10331
10332 static int
10333 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10334 {
10335 int ret;
10336
10337 /* Mark this section as checked. */
10338 isec->call_check_done = 1;
10339
10340 /* We know none of our code bearing sections will need toc stubs. */
10341 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10342 return 0;
10343
10344 if (isec->size == 0)
10345 return 0;
10346
10347 if (isec->output_section == NULL)
10348 return 0;
10349
10350 ret = 0;
10351 if (isec->reloc_count != 0)
10352 {
10353 Elf_Internal_Rela *relstart, *rel;
10354 Elf_Internal_Sym *local_syms;
10355 struct ppc_link_hash_table *htab;
10356
10357 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10358 info->keep_memory);
10359 if (relstart == NULL)
10360 return -1;
10361
10362 /* Look for branches to outside of this section. */
10363 local_syms = NULL;
10364 htab = ppc_hash_table (info);
10365 if (htab == NULL)
10366 return -1;
10367
10368 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10369 {
10370 enum elf_ppc64_reloc_type r_type;
10371 unsigned long r_symndx;
10372 struct elf_link_hash_entry *h;
10373 struct ppc_link_hash_entry *eh;
10374 Elf_Internal_Sym *sym;
10375 asection *sym_sec;
10376 struct _opd_sec_data *opd;
10377 bfd_vma sym_value;
10378 bfd_vma dest;
10379
10380 r_type = ELF64_R_TYPE (rel->r_info);
10381 if (r_type != R_PPC64_REL24
10382 && r_type != R_PPC64_REL14
10383 && r_type != R_PPC64_REL14_BRTAKEN
10384 && r_type != R_PPC64_REL14_BRNTAKEN)
10385 continue;
10386
10387 r_symndx = ELF64_R_SYM (rel->r_info);
10388 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10389 isec->owner))
10390 {
10391 ret = -1;
10392 break;
10393 }
10394
10395 /* Calls to dynamic lib functions go through a plt call stub
10396 that uses r2. */
10397 eh = (struct ppc_link_hash_entry *) h;
10398 if (eh != NULL
10399 && (eh->elf.plt.plist != NULL
10400 || (eh->oh != NULL
10401 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10402 {
10403 ret = 1;
10404 break;
10405 }
10406
10407 if (sym_sec == NULL)
10408 /* Ignore other undefined symbols. */
10409 continue;
10410
10411 /* Assume branches to other sections not included in the
10412 link need stubs too, to cover -R and absolute syms. */
10413 if (sym_sec->output_section == NULL)
10414 {
10415 ret = 1;
10416 break;
10417 }
10418
10419 if (h == NULL)
10420 sym_value = sym->st_value;
10421 else
10422 {
10423 if (h->root.type != bfd_link_hash_defined
10424 && h->root.type != bfd_link_hash_defweak)
10425 abort ();
10426 sym_value = h->root.u.def.value;
10427 }
10428 sym_value += rel->r_addend;
10429
10430 /* If this branch reloc uses an opd sym, find the code section. */
10431 opd = get_opd_info (sym_sec);
10432 if (opd != NULL)
10433 {
10434 if (h == NULL && opd->adjust != NULL)
10435 {
10436 long adjust;
10437
10438 adjust = opd->adjust[sym->st_value / 8];
10439 if (adjust == -1)
10440 /* Assume deleted functions won't ever be called. */
10441 continue;
10442 sym_value += adjust;
10443 }
10444
10445 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10446 if (dest == (bfd_vma) -1)
10447 continue;
10448 }
10449 else
10450 dest = (sym_value
10451 + sym_sec->output_offset
10452 + sym_sec->output_section->vma);
10453
10454 /* Ignore branch to self. */
10455 if (sym_sec == isec)
10456 continue;
10457
10458 /* If the called function uses the toc, we need a stub. */
10459 if (sym_sec->has_toc_reloc
10460 || sym_sec->makes_toc_func_call)
10461 {
10462 ret = 1;
10463 break;
10464 }
10465
10466 /* Assume any branch that needs a long branch stub might in fact
10467 need a plt_branch stub. A plt_branch stub uses r2. */
10468 else if (dest - (isec->output_offset
10469 + isec->output_section->vma
10470 + rel->r_offset) + (1 << 25) >= (2 << 25))
10471 {
10472 ret = 1;
10473 break;
10474 }
10475
10476 /* If calling back to a section in the process of being
10477 tested, we can't say for sure that no toc adjusting stubs
10478 are needed, so don't return zero. */
10479 else if (sym_sec->call_check_in_progress)
10480 ret = 2;
10481
10482 /* Branches to another section that itself doesn't have any TOC
10483 references are OK. Recursively call ourselves to check. */
10484 else if (!sym_sec->call_check_done)
10485 {
10486 int recur;
10487
10488 /* Mark current section as indeterminate, so that other
10489 sections that call back to current won't be marked as
10490 known. */
10491 isec->call_check_in_progress = 1;
10492 recur = toc_adjusting_stub_needed (info, sym_sec);
10493 isec->call_check_in_progress = 0;
10494
10495 if (recur != 0)
10496 {
10497 ret = recur;
10498 if (recur != 2)
10499 break;
10500 }
10501 }
10502 }
10503
10504 if (local_syms != NULL
10505 && (elf_symtab_hdr (isec->owner).contents
10506 != (unsigned char *) local_syms))
10507 free (local_syms);
10508 if (elf_section_data (isec)->relocs != relstart)
10509 free (relstart);
10510 }
10511
10512 if ((ret & 1) == 0
10513 && isec->map_head.s != NULL
10514 && (strcmp (isec->output_section->name, ".init") == 0
10515 || strcmp (isec->output_section->name, ".fini") == 0))
10516 {
10517 if (isec->map_head.s->has_toc_reloc
10518 || isec->map_head.s->makes_toc_func_call)
10519 ret = 1;
10520 else if (!isec->map_head.s->call_check_done)
10521 {
10522 int recur;
10523 isec->call_check_in_progress = 1;
10524 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10525 isec->call_check_in_progress = 0;
10526 if (recur != 0)
10527 ret = recur;
10528 }
10529 }
10530
10531 if (ret == 1)
10532 isec->makes_toc_func_call = 1;
10533
10534 return ret;
10535 }
10536
10537 /* The linker repeatedly calls this function for each input section,
10538 in the order that input sections are linked into output sections.
10539 Build lists of input sections to determine groupings between which
10540 we may insert linker stubs. */
10541
10542 bfd_boolean
10543 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10544 {
10545 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10546
10547 if (htab == NULL)
10548 return FALSE;
10549
10550 if ((isec->output_section->flags & SEC_CODE) != 0
10551 && isec->output_section->index <= htab->top_index)
10552 {
10553 asection **list = htab->input_list + isec->output_section->index;
10554 /* Steal the link_sec pointer for our list. */
10555 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10556 /* This happens to make the list in reverse order,
10557 which is what we want. */
10558 PREV_SEC (isec) = *list;
10559 *list = isec;
10560 }
10561
10562 if (htab->multi_toc_needed)
10563 {
10564 /* If a code section has a function that uses the TOC then we need
10565 to use the right TOC (obviously). Also, make sure that .opd gets
10566 the correct TOC value for R_PPC64_TOC relocs that don't have or
10567 can't find their function symbol (shouldn't ever happen now).
10568 Also specially treat .fixup for the linux kernel. .fixup
10569 contains branches, but only back to the function that hit an
10570 exception. */
10571 if (isec->has_toc_reloc
10572 || (isec->flags & SEC_CODE) == 0
10573 || strcmp (isec->name, ".fixup") == 0)
10574 {
10575 if (elf_gp (isec->owner) != 0)
10576 htab->toc_curr = elf_gp (isec->owner);
10577 }
10578 else if (!isec->call_check_done
10579 && toc_adjusting_stub_needed (info, isec) < 0)
10580 return FALSE;
10581 }
10582
10583 /* Functions that don't use the TOC can belong in any TOC group.
10584 Use the last TOC base. This happens to make _init and _fini
10585 pasting work, because the fragments generally don't use the TOC. */
10586 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10587 return TRUE;
10588 }
10589
10590 /* Check that all .init and .fini sections use the same toc, if they
10591 have toc relocs. */
10592
10593 static bfd_boolean
10594 check_pasted_section (struct bfd_link_info *info, const char *name)
10595 {
10596 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10597
10598 if (o != NULL)
10599 {
10600 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10601 bfd_vma toc_off = 0;
10602 asection *i;
10603
10604 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10605 if (i->has_toc_reloc)
10606 {
10607 if (toc_off == 0)
10608 toc_off = htab->stub_group[i->id].toc_off;
10609 else if (toc_off != htab->stub_group[i->id].toc_off)
10610 return FALSE;
10611 }
10612 /* Make sure the whole pasted function uses the same toc offset. */
10613 if (toc_off != 0)
10614 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10615 htab->stub_group[i->id].toc_off = toc_off;
10616 }
10617 return TRUE;
10618 }
10619
10620 bfd_boolean
10621 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10622 {
10623 return (check_pasted_section (info, ".init")
10624 & check_pasted_section (info, ".fini"));
10625 }
10626
10627 /* See whether we can group stub sections together. Grouping stub
10628 sections may result in fewer stubs. More importantly, we need to
10629 put all .init* and .fini* stubs at the beginning of the .init or
10630 .fini output sections respectively, because glibc splits the
10631 _init and _fini functions into multiple parts. Putting a stub in
10632 the middle of a function is not a good idea. */
10633
10634 static void
10635 group_sections (struct ppc_link_hash_table *htab,
10636 bfd_size_type stub_group_size,
10637 bfd_boolean stubs_always_before_branch)
10638 {
10639 asection **list;
10640 bfd_size_type stub14_group_size;
10641 bfd_boolean suppress_size_errors;
10642
10643 suppress_size_errors = FALSE;
10644 stub14_group_size = stub_group_size;
10645 if (stub_group_size == 1)
10646 {
10647 /* Default values. */
10648 if (stubs_always_before_branch)
10649 {
10650 stub_group_size = 0x1e00000;
10651 stub14_group_size = 0x7800;
10652 }
10653 else
10654 {
10655 stub_group_size = 0x1c00000;
10656 stub14_group_size = 0x7000;
10657 }
10658 suppress_size_errors = TRUE;
10659 }
10660
10661 list = htab->input_list + htab->top_index;
10662 do
10663 {
10664 asection *tail = *list;
10665 while (tail != NULL)
10666 {
10667 asection *curr;
10668 asection *prev;
10669 bfd_size_type total;
10670 bfd_boolean big_sec;
10671 bfd_vma curr_toc;
10672
10673 curr = tail;
10674 total = tail->size;
10675 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10676 && ppc64_elf_section_data (tail)->has_14bit_branch
10677 ? stub14_group_size : stub_group_size);
10678 if (big_sec && !suppress_size_errors)
10679 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10680 tail->owner, tail);
10681 curr_toc = htab->stub_group[tail->id].toc_off;
10682
10683 while ((prev = PREV_SEC (curr)) != NULL
10684 && ((total += curr->output_offset - prev->output_offset)
10685 < (ppc64_elf_section_data (prev) != NULL
10686 && ppc64_elf_section_data (prev)->has_14bit_branch
10687 ? stub14_group_size : stub_group_size))
10688 && htab->stub_group[prev->id].toc_off == curr_toc)
10689 curr = prev;
10690
10691 /* OK, the size from the start of CURR to the end is less
10692 than stub_group_size and thus can be handled by one stub
10693 section. (or the tail section is itself larger than
10694 stub_group_size, in which case we may be toast.) We
10695 should really be keeping track of the total size of stubs
10696 added here, as stubs contribute to the final output
10697 section size. That's a little tricky, and this way will
10698 only break if stubs added make the total size more than
10699 2^25, ie. for the default stub_group_size, if stubs total
10700 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10701 do
10702 {
10703 prev = PREV_SEC (tail);
10704 /* Set up this stub group. */
10705 htab->stub_group[tail->id].link_sec = curr;
10706 }
10707 while (tail != curr && (tail = prev) != NULL);
10708
10709 /* But wait, there's more! Input sections up to stub_group_size
10710 bytes before the stub section can be handled by it too.
10711 Don't do this if we have a really large section after the
10712 stubs, as adding more stubs increases the chance that
10713 branches may not reach into the stub section. */
10714 if (!stubs_always_before_branch && !big_sec)
10715 {
10716 total = 0;
10717 while (prev != NULL
10718 && ((total += tail->output_offset - prev->output_offset)
10719 < (ppc64_elf_section_data (prev) != NULL
10720 && ppc64_elf_section_data (prev)->has_14bit_branch
10721 ? stub14_group_size : stub_group_size))
10722 && htab->stub_group[prev->id].toc_off == curr_toc)
10723 {
10724 tail = prev;
10725 prev = PREV_SEC (tail);
10726 htab->stub_group[tail->id].link_sec = curr;
10727 }
10728 }
10729 tail = prev;
10730 }
10731 }
10732 while (list-- != htab->input_list);
10733 free (htab->input_list);
10734 #undef PREV_SEC
10735 }
10736
10737 /* Determine and set the size of the stub section for a final link.
10738
10739 The basic idea here is to examine all the relocations looking for
10740 PC-relative calls to a target that is unreachable with a "bl"
10741 instruction. */
10742
10743 bfd_boolean
10744 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10745 {
10746 bfd_size_type stub_group_size;
10747 bfd_boolean stubs_always_before_branch;
10748 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10749
10750 if (htab == NULL)
10751 return FALSE;
10752
10753 stubs_always_before_branch = group_size < 0;
10754 if (group_size < 0)
10755 stub_group_size = -group_size;
10756 else
10757 stub_group_size = group_size;
10758
10759 group_sections (htab, stub_group_size, stubs_always_before_branch);
10760
10761 while (1)
10762 {
10763 bfd *input_bfd;
10764 unsigned int bfd_indx;
10765 asection *stub_sec;
10766
10767 htab->stub_iteration += 1;
10768
10769 for (input_bfd = info->input_bfds, bfd_indx = 0;
10770 input_bfd != NULL;
10771 input_bfd = input_bfd->link_next, bfd_indx++)
10772 {
10773 Elf_Internal_Shdr *symtab_hdr;
10774 asection *section;
10775 Elf_Internal_Sym *local_syms = NULL;
10776
10777 if (!is_ppc64_elf (input_bfd))
10778 continue;
10779
10780 /* We'll need the symbol table in a second. */
10781 symtab_hdr = &elf_symtab_hdr (input_bfd);
10782 if (symtab_hdr->sh_info == 0)
10783 continue;
10784
10785 /* Walk over each section attached to the input bfd. */
10786 for (section = input_bfd->sections;
10787 section != NULL;
10788 section = section->next)
10789 {
10790 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10791
10792 /* If there aren't any relocs, then there's nothing more
10793 to do. */
10794 if ((section->flags & SEC_RELOC) == 0
10795 || (section->flags & SEC_ALLOC) == 0
10796 || (section->flags & SEC_LOAD) == 0
10797 || (section->flags & SEC_CODE) == 0
10798 || section->reloc_count == 0)
10799 continue;
10800
10801 /* If this section is a link-once section that will be
10802 discarded, then don't create any stubs. */
10803 if (section->output_section == NULL
10804 || section->output_section->owner != info->output_bfd)
10805 continue;
10806
10807 /* Get the relocs. */
10808 internal_relocs
10809 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10810 info->keep_memory);
10811 if (internal_relocs == NULL)
10812 goto error_ret_free_local;
10813
10814 /* Now examine each relocation. */
10815 irela = internal_relocs;
10816 irelaend = irela + section->reloc_count;
10817 for (; irela < irelaend; irela++)
10818 {
10819 enum elf_ppc64_reloc_type r_type;
10820 unsigned int r_indx;
10821 enum ppc_stub_type stub_type;
10822 struct ppc_stub_hash_entry *stub_entry;
10823 asection *sym_sec, *code_sec;
10824 bfd_vma sym_value, code_value;
10825 bfd_vma destination;
10826 bfd_boolean ok_dest;
10827 struct ppc_link_hash_entry *hash;
10828 struct ppc_link_hash_entry *fdh;
10829 struct elf_link_hash_entry *h;
10830 Elf_Internal_Sym *sym;
10831 char *stub_name;
10832 const asection *id_sec;
10833 struct _opd_sec_data *opd;
10834 struct plt_entry *plt_ent;
10835
10836 r_type = ELF64_R_TYPE (irela->r_info);
10837 r_indx = ELF64_R_SYM (irela->r_info);
10838
10839 if (r_type >= R_PPC64_max)
10840 {
10841 bfd_set_error (bfd_error_bad_value);
10842 goto error_ret_free_internal;
10843 }
10844
10845 /* Only look for stubs on branch instructions. */
10846 if (r_type != R_PPC64_REL24
10847 && r_type != R_PPC64_REL14
10848 && r_type != R_PPC64_REL14_BRTAKEN
10849 && r_type != R_PPC64_REL14_BRNTAKEN)
10850 continue;
10851
10852 /* Now determine the call target, its name, value,
10853 section. */
10854 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10855 r_indx, input_bfd))
10856 goto error_ret_free_internal;
10857 hash = (struct ppc_link_hash_entry *) h;
10858
10859 ok_dest = FALSE;
10860 fdh = NULL;
10861 sym_value = 0;
10862 if (hash == NULL)
10863 {
10864 sym_value = sym->st_value;
10865 ok_dest = TRUE;
10866 }
10867 else if (hash->elf.root.type == bfd_link_hash_defined
10868 || hash->elf.root.type == bfd_link_hash_defweak)
10869 {
10870 sym_value = hash->elf.root.u.def.value;
10871 if (sym_sec->output_section != NULL)
10872 ok_dest = TRUE;
10873 }
10874 else if (hash->elf.root.type == bfd_link_hash_undefweak
10875 || hash->elf.root.type == bfd_link_hash_undefined)
10876 {
10877 /* Recognise an old ABI func code entry sym, and
10878 use the func descriptor sym instead if it is
10879 defined. */
10880 if (hash->elf.root.root.string[0] == '.'
10881 && (fdh = lookup_fdh (hash, htab)) != NULL)
10882 {
10883 if (fdh->elf.root.type == bfd_link_hash_defined
10884 || fdh->elf.root.type == bfd_link_hash_defweak)
10885 {
10886 sym_sec = fdh->elf.root.u.def.section;
10887 sym_value = fdh->elf.root.u.def.value;
10888 if (sym_sec->output_section != NULL)
10889 ok_dest = TRUE;
10890 }
10891 else
10892 fdh = NULL;
10893 }
10894 }
10895 else
10896 {
10897 bfd_set_error (bfd_error_bad_value);
10898 goto error_ret_free_internal;
10899 }
10900
10901 destination = 0;
10902 if (ok_dest)
10903 {
10904 sym_value += irela->r_addend;
10905 destination = (sym_value
10906 + sym_sec->output_offset
10907 + sym_sec->output_section->vma);
10908 }
10909
10910 code_sec = sym_sec;
10911 code_value = sym_value;
10912 opd = get_opd_info (sym_sec);
10913 if (opd != NULL)
10914 {
10915 bfd_vma dest;
10916
10917 if (hash == NULL && opd->adjust != NULL)
10918 {
10919 long adjust = opd->adjust[sym_value / 8];
10920 if (adjust == -1)
10921 continue;
10922 code_value += adjust;
10923 sym_value += adjust;
10924 }
10925 dest = opd_entry_value (sym_sec, sym_value,
10926 &code_sec, &code_value);
10927 if (dest != (bfd_vma) -1)
10928 {
10929 destination = dest;
10930 if (fdh != NULL)
10931 {
10932 /* Fixup old ABI sym to point at code
10933 entry. */
10934 hash->elf.root.type = bfd_link_hash_defweak;
10935 hash->elf.root.u.def.section = code_sec;
10936 hash->elf.root.u.def.value = code_value;
10937 }
10938 }
10939 }
10940
10941 /* Determine what (if any) linker stub is needed. */
10942 plt_ent = NULL;
10943 stub_type = ppc_type_of_stub (section, irela, &hash,
10944 &plt_ent, destination);
10945
10946 if (stub_type != ppc_stub_plt_call)
10947 {
10948 /* Check whether we need a TOC adjusting stub.
10949 Since the linker pastes together pieces from
10950 different object files when creating the
10951 _init and _fini functions, it may be that a
10952 call to what looks like a local sym is in
10953 fact a call needing a TOC adjustment. */
10954 if (code_sec != NULL
10955 && code_sec->output_section != NULL
10956 && (htab->stub_group[code_sec->id].toc_off
10957 != htab->stub_group[section->id].toc_off)
10958 && (code_sec->has_toc_reloc
10959 || code_sec->makes_toc_func_call))
10960 stub_type = ppc_stub_long_branch_r2off;
10961 }
10962
10963 if (stub_type == ppc_stub_none)
10964 continue;
10965
10966 /* __tls_get_addr calls might be eliminated. */
10967 if (stub_type != ppc_stub_plt_call
10968 && hash != NULL
10969 && (hash == htab->tls_get_addr
10970 || hash == htab->tls_get_addr_fd)
10971 && section->has_tls_reloc
10972 && irela != internal_relocs)
10973 {
10974 /* Get tls info. */
10975 unsigned char *tls_mask;
10976
10977 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10978 irela - 1, input_bfd))
10979 goto error_ret_free_internal;
10980 if (*tls_mask != 0)
10981 continue;
10982 }
10983
10984 /* Support for grouping stub sections. */
10985 id_sec = htab->stub_group[section->id].link_sec;
10986
10987 /* Get the name of this stub. */
10988 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10989 if (!stub_name)
10990 goto error_ret_free_internal;
10991
10992 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10993 stub_name, FALSE, FALSE);
10994 if (stub_entry != NULL)
10995 {
10996 /* The proper stub has already been created. */
10997 free (stub_name);
10998 continue;
10999 }
11000
11001 stub_entry = ppc_add_stub (stub_name, section, htab);
11002 if (stub_entry == NULL)
11003 {
11004 free (stub_name);
11005 error_ret_free_internal:
11006 if (elf_section_data (section)->relocs == NULL)
11007 free (internal_relocs);
11008 error_ret_free_local:
11009 if (local_syms != NULL
11010 && (symtab_hdr->contents
11011 != (unsigned char *) local_syms))
11012 free (local_syms);
11013 return FALSE;
11014 }
11015
11016 stub_entry->stub_type = stub_type;
11017 if (stub_type != ppc_stub_plt_call)
11018 {
11019 stub_entry->target_value = code_value;
11020 stub_entry->target_section = code_sec;
11021 }
11022 else
11023 {
11024 stub_entry->target_value = sym_value;
11025 stub_entry->target_section = sym_sec;
11026 }
11027 stub_entry->h = hash;
11028 stub_entry->plt_ent = plt_ent;
11029 stub_entry->addend = irela->r_addend;
11030
11031 if (stub_entry->h != NULL)
11032 htab->stub_globals += 1;
11033 }
11034
11035 /* We're done with the internal relocs, free them. */
11036 if (elf_section_data (section)->relocs != internal_relocs)
11037 free (internal_relocs);
11038 }
11039
11040 if (local_syms != NULL
11041 && symtab_hdr->contents != (unsigned char *) local_syms)
11042 {
11043 if (!info->keep_memory)
11044 free (local_syms);
11045 else
11046 symtab_hdr->contents = (unsigned char *) local_syms;
11047 }
11048 }
11049
11050 /* We may have added some stubs. Find out the new size of the
11051 stub sections. */
11052 for (stub_sec = htab->stub_bfd->sections;
11053 stub_sec != NULL;
11054 stub_sec = stub_sec->next)
11055 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11056 {
11057 stub_sec->rawsize = stub_sec->size;
11058 stub_sec->size = 0;
11059 stub_sec->reloc_count = 0;
11060 stub_sec->flags &= ~SEC_RELOC;
11061 }
11062
11063 htab->brlt->size = 0;
11064 htab->brlt->reloc_count = 0;
11065 htab->brlt->flags &= ~SEC_RELOC;
11066 if (htab->relbrlt != NULL)
11067 htab->relbrlt->size = 0;
11068
11069 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11070
11071 if (info->emitrelocations
11072 && htab->glink != NULL && htab->glink->size != 0)
11073 {
11074 htab->glink->reloc_count = 1;
11075 htab->glink->flags |= SEC_RELOC;
11076 }
11077
11078 for (stub_sec = htab->stub_bfd->sections;
11079 stub_sec != NULL;
11080 stub_sec = stub_sec->next)
11081 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11082 && stub_sec->rawsize != stub_sec->size)
11083 break;
11084
11085 /* Exit from this loop when no stubs have been added, and no stubs
11086 have changed size. */
11087 if (stub_sec == NULL)
11088 break;
11089
11090 /* Ask the linker to do its stuff. */
11091 (*htab->layout_sections_again) ();
11092 }
11093
11094 /* It would be nice to strip htab->brlt from the output if the
11095 section is empty, but it's too late. If we strip sections here,
11096 the dynamic symbol table is corrupted since the section symbol
11097 for the stripped section isn't written. */
11098
11099 return TRUE;
11100 }
11101
11102 /* Called after we have determined section placement. If sections
11103 move, we'll be called again. Provide a value for TOCstart. */
11104
11105 bfd_vma
11106 ppc64_elf_toc (bfd *obfd)
11107 {
11108 asection *s;
11109 bfd_vma TOCstart;
11110
11111 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11112 order. The TOC starts where the first of these sections starts. */
11113 s = bfd_get_section_by_name (obfd, ".got");
11114 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11115 s = bfd_get_section_by_name (obfd, ".toc");
11116 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11117 s = bfd_get_section_by_name (obfd, ".tocbss");
11118 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11119 s = bfd_get_section_by_name (obfd, ".plt");
11120 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11121 {
11122 /* This may happen for
11123 o references to TOC base (SYM@toc / TOC[tc0]) without a
11124 .toc directive
11125 o bad linker script
11126 o --gc-sections and empty TOC sections
11127
11128 FIXME: Warn user? */
11129
11130 /* Look for a likely section. We probably won't even be
11131 using TOCstart. */
11132 for (s = obfd->sections; s != NULL; s = s->next)
11133 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11134 | SEC_EXCLUDE))
11135 == (SEC_ALLOC | SEC_SMALL_DATA))
11136 break;
11137 if (s == NULL)
11138 for (s = obfd->sections; s != NULL; s = s->next)
11139 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11140 == (SEC_ALLOC | SEC_SMALL_DATA))
11141 break;
11142 if (s == NULL)
11143 for (s = obfd->sections; s != NULL; s = s->next)
11144 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11145 == SEC_ALLOC)
11146 break;
11147 if (s == NULL)
11148 for (s = obfd->sections; s != NULL; s = s->next)
11149 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11150 break;
11151 }
11152
11153 TOCstart = 0;
11154 if (s != NULL)
11155 TOCstart = s->output_section->vma + s->output_offset;
11156
11157 return TOCstart;
11158 }
11159
11160 /* Build all the stubs associated with the current output file.
11161 The stubs are kept in a hash table attached to the main linker
11162 hash table. This function is called via gldelf64ppc_finish. */
11163
11164 bfd_boolean
11165 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11166 struct bfd_link_info *info,
11167 char **stats)
11168 {
11169 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11170 asection *stub_sec;
11171 bfd_byte *p;
11172 int stub_sec_count = 0;
11173
11174 if (htab == NULL)
11175 return FALSE;
11176
11177 htab->emit_stub_syms = emit_stub_syms;
11178
11179 /* Allocate memory to hold the linker stubs. */
11180 for (stub_sec = htab->stub_bfd->sections;
11181 stub_sec != NULL;
11182 stub_sec = stub_sec->next)
11183 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11184 && stub_sec->size != 0)
11185 {
11186 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11187 if (stub_sec->contents == NULL)
11188 return FALSE;
11189 /* We want to check that built size is the same as calculated
11190 size. rawsize is a convenient location to use. */
11191 stub_sec->rawsize = stub_sec->size;
11192 stub_sec->size = 0;
11193 }
11194
11195 if (htab->glink != NULL && htab->glink->size != 0)
11196 {
11197 unsigned int indx;
11198 bfd_vma plt0;
11199
11200 /* Build the .glink plt call stub. */
11201 if (htab->emit_stub_syms)
11202 {
11203 struct elf_link_hash_entry *h;
11204 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11205 TRUE, FALSE, FALSE);
11206 if (h == NULL)
11207 return FALSE;
11208 if (h->root.type == bfd_link_hash_new)
11209 {
11210 h->root.type = bfd_link_hash_defined;
11211 h->root.u.def.section = htab->glink;
11212 h->root.u.def.value = 8;
11213 h->ref_regular = 1;
11214 h->def_regular = 1;
11215 h->ref_regular_nonweak = 1;
11216 h->forced_local = 1;
11217 h->non_elf = 0;
11218 }
11219 }
11220 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11221 if (info->emitrelocations)
11222 {
11223 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11224 if (r == NULL)
11225 return FALSE;
11226 r->r_offset = (htab->glink->output_offset
11227 + htab->glink->output_section->vma);
11228 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11229 r->r_addend = plt0;
11230 }
11231 p = htab->glink->contents;
11232 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11233 bfd_put_64 (htab->glink->owner, plt0, p);
11234 p += 8;
11235 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11236 p += 4;
11237 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11238 p += 4;
11239 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11240 p += 4;
11241 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11242 p += 4;
11243 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11244 p += 4;
11245 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11246 p += 4;
11247 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11248 p += 4;
11249 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11250 p += 4;
11251 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11252 p += 4;
11253 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11254 p += 4;
11255 bfd_put_32 (htab->glink->owner, BCTR, p);
11256 p += 4;
11257 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11258 {
11259 bfd_put_32 (htab->glink->owner, NOP, p);
11260 p += 4;
11261 }
11262
11263 /* Build the .glink lazy link call stubs. */
11264 indx = 0;
11265 while (p < htab->glink->contents + htab->glink->size)
11266 {
11267 if (indx < 0x8000)
11268 {
11269 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11270 p += 4;
11271 }
11272 else
11273 {
11274 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11275 p += 4;
11276 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11277 p += 4;
11278 }
11279 bfd_put_32 (htab->glink->owner,
11280 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11281 indx++;
11282 p += 4;
11283 }
11284 htab->glink->rawsize = p - htab->glink->contents;
11285 }
11286
11287 if (htab->brlt->size != 0)
11288 {
11289 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11290 htab->brlt->size);
11291 if (htab->brlt->contents == NULL)
11292 return FALSE;
11293 }
11294 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11295 {
11296 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11297 htab->relbrlt->size);
11298 if (htab->relbrlt->contents == NULL)
11299 return FALSE;
11300 }
11301
11302 /* Build the stubs as directed by the stub hash table. */
11303 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11304
11305 if (htab->relbrlt != NULL)
11306 htab->relbrlt->reloc_count = 0;
11307
11308 for (stub_sec = htab->stub_bfd->sections;
11309 stub_sec != NULL;
11310 stub_sec = stub_sec->next)
11311 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11312 {
11313 stub_sec_count += 1;
11314 if (stub_sec->rawsize != stub_sec->size)
11315 break;
11316 }
11317
11318 if (stub_sec != NULL
11319 || htab->glink->rawsize != htab->glink->size)
11320 {
11321 htab->stub_error = TRUE;
11322 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11323 }
11324
11325 if (htab->stub_error)
11326 return FALSE;
11327
11328 if (stats != NULL)
11329 {
11330 *stats = bfd_malloc (500);
11331 if (*stats == NULL)
11332 return FALSE;
11333
11334 sprintf (*stats, _("linker stubs in %u group%s\n"
11335 " branch %lu\n"
11336 " toc adjust %lu\n"
11337 " long branch %lu\n"
11338 " long toc adj %lu\n"
11339 " plt call %lu"),
11340 stub_sec_count,
11341 stub_sec_count == 1 ? "" : "s",
11342 htab->stub_count[ppc_stub_long_branch - 1],
11343 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11344 htab->stub_count[ppc_stub_plt_branch - 1],
11345 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11346 htab->stub_count[ppc_stub_plt_call - 1]);
11347 }
11348 return TRUE;
11349 }
11350
11351 /* This function undoes the changes made by add_symbol_adjust. */
11352
11353 static bfd_boolean
11354 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11355 {
11356 struct ppc_link_hash_entry *eh;
11357
11358 if (h->root.type == bfd_link_hash_indirect)
11359 return TRUE;
11360
11361 if (h->root.type == bfd_link_hash_warning)
11362 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11363
11364 eh = (struct ppc_link_hash_entry *) h;
11365 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11366 return TRUE;
11367
11368 eh->elf.root.type = bfd_link_hash_undefined;
11369 return TRUE;
11370 }
11371
11372 void
11373 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11374 {
11375 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11376
11377 if (htab != NULL)
11378 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11379 }
11380
11381 /* What to do when ld finds relocations against symbols defined in
11382 discarded sections. */
11383
11384 static unsigned int
11385 ppc64_elf_action_discarded (asection *sec)
11386 {
11387 if (strcmp (".opd", sec->name) == 0)
11388 return 0;
11389
11390 if (strcmp (".toc", sec->name) == 0)
11391 return 0;
11392
11393 if (strcmp (".toc1", sec->name) == 0)
11394 return 0;
11395
11396 return _bfd_elf_default_action_discarded (sec);
11397 }
11398
11399 /* REL points to a low-part reloc on a largetoc instruction sequence.
11400 Find the matching high-part reloc instruction and verify that it
11401 is addis REG,x,imm. If so, set *REG to x and return a pointer to
11402 the high-part reloc. */
11403
11404 static const Elf_Internal_Rela *
11405 ha_reloc_match (const Elf_Internal_Rela *relocs,
11406 const Elf_Internal_Rela *rel,
11407 unsigned int *reg,
11408 bfd_boolean match_addend,
11409 const bfd *input_bfd,
11410 const bfd_byte *contents)
11411 {
11412 enum elf_ppc64_reloc_type r_type, r_type_ha;
11413 bfd_vma r_info_ha, r_addend;
11414
11415 r_type = ELF64_R_TYPE (rel->r_info);
11416 switch (r_type)
11417 {
11418 case R_PPC64_GOT_TLSLD16_LO:
11419 case R_PPC64_GOT_TLSGD16_LO:
11420 case R_PPC64_GOT_TPREL16_LO_DS:
11421 case R_PPC64_GOT_DTPREL16_LO_DS:
11422 case R_PPC64_GOT16_LO:
11423 case R_PPC64_TOC16_LO:
11424 r_type_ha = r_type + 2;
11425 break;
11426 case R_PPC64_GOT16_LO_DS:
11427 r_type_ha = R_PPC64_GOT16_HA;
11428 break;
11429 case R_PPC64_TOC16_LO_DS:
11430 r_type_ha = R_PPC64_TOC16_HA;
11431 break;
11432 default:
11433 abort ();
11434 }
11435 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11436 r_addend = rel->r_addend;
11437
11438 while (--rel >= relocs)
11439 if (rel->r_info == r_info_ha
11440 && (!match_addend
11441 || rel->r_addend == r_addend))
11442 {
11443 const bfd_byte *p = contents + (rel->r_offset & ~3);
11444 unsigned int insn = bfd_get_32 (input_bfd, p);
11445 if ((insn & (0x3f << 26)) == (15u << 26) /* addis rt,x,imm */
11446 && (insn & (0x1f << 21)) == (*reg << 21))
11447 {
11448 *reg = (insn >> 16) & 0x1f;
11449 return rel;
11450 }
11451 break;
11452 }
11453 return NULL;
11454 }
11455
11456 /* The RELOCATE_SECTION function is called by the ELF backend linker
11457 to handle the relocations for a section.
11458
11459 The relocs are always passed as Rela structures; if the section
11460 actually uses Rel structures, the r_addend field will always be
11461 zero.
11462
11463 This function is responsible for adjust the section contents as
11464 necessary, and (if using Rela relocs and generating a
11465 relocatable output file) adjusting the reloc addend as
11466 necessary.
11467
11468 This function does not have to worry about setting the reloc
11469 address or the reloc symbol index.
11470
11471 LOCAL_SYMS is a pointer to the swapped in local symbols.
11472
11473 LOCAL_SECTIONS is an array giving the section in the input file
11474 corresponding to the st_shndx field of each local symbol.
11475
11476 The global hash table entry for the global symbols can be found
11477 via elf_sym_hashes (input_bfd).
11478
11479 When generating relocatable output, this function must handle
11480 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11481 going to be the section symbol corresponding to the output
11482 section, which means that the addend must be adjusted
11483 accordingly. */
11484
11485 static bfd_boolean
11486 ppc64_elf_relocate_section (bfd *output_bfd,
11487 struct bfd_link_info *info,
11488 bfd *input_bfd,
11489 asection *input_section,
11490 bfd_byte *contents,
11491 Elf_Internal_Rela *relocs,
11492 Elf_Internal_Sym *local_syms,
11493 asection **local_sections)
11494 {
11495 struct ppc_link_hash_table *htab;
11496 Elf_Internal_Shdr *symtab_hdr;
11497 struct elf_link_hash_entry **sym_hashes;
11498 Elf_Internal_Rela *rel;
11499 Elf_Internal_Rela *relend;
11500 Elf_Internal_Rela outrel;
11501 bfd_byte *loc;
11502 struct got_entry **local_got_ents;
11503 unsigned char *ha_opt;
11504 bfd_vma TOCstart;
11505 bfd_boolean no_ha_opt;
11506 bfd_boolean ret = TRUE;
11507 bfd_boolean is_opd;
11508 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11509 bfd_boolean is_power4 = FALSE;
11510 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11511
11512 /* Initialize howto table if needed. */
11513 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11514 ppc_howto_init ();
11515
11516 htab = ppc_hash_table (info);
11517 if (htab == NULL)
11518 return FALSE;
11519
11520 /* Don't relocate stub sections. */
11521 if (input_section->owner == htab->stub_bfd)
11522 return TRUE;
11523
11524 BFD_ASSERT (is_ppc64_elf (input_bfd));
11525
11526 local_got_ents = elf_local_got_ents (input_bfd);
11527 TOCstart = elf_gp (output_bfd);
11528 symtab_hdr = &elf_symtab_hdr (input_bfd);
11529 sym_hashes = elf_sym_hashes (input_bfd);
11530 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11531 ha_opt = NULL;
11532 no_ha_opt = FALSE;
11533
11534 rel = relocs;
11535 relend = relocs + input_section->reloc_count;
11536 for (; rel < relend; rel++)
11537 {
11538 enum elf_ppc64_reloc_type r_type;
11539 bfd_vma addend, orig_addend;
11540 bfd_reloc_status_type r;
11541 Elf_Internal_Sym *sym;
11542 asection *sec;
11543 struct elf_link_hash_entry *h_elf;
11544 struct ppc_link_hash_entry *h;
11545 struct ppc_link_hash_entry *fdh;
11546 const char *sym_name;
11547 unsigned long r_symndx, toc_symndx;
11548 bfd_vma toc_addend;
11549 unsigned char tls_mask, tls_gd, tls_type;
11550 unsigned char sym_type;
11551 bfd_vma relocation;
11552 bfd_boolean unresolved_reloc;
11553 bfd_boolean warned;
11554 unsigned int insn;
11555 bfd_vma mask;
11556 struct ppc_stub_hash_entry *stub_entry;
11557 bfd_vma max_br_offset;
11558 bfd_vma from;
11559
11560 r_type = ELF64_R_TYPE (rel->r_info);
11561 r_symndx = ELF64_R_SYM (rel->r_info);
11562
11563 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11564 symbol of the previous ADDR64 reloc. The symbol gives us the
11565 proper TOC base to use. */
11566 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11567 && rel != relocs
11568 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11569 && is_opd)
11570 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11571
11572 sym = NULL;
11573 sec = NULL;
11574 h_elf = NULL;
11575 sym_name = NULL;
11576 unresolved_reloc = FALSE;
11577 warned = FALSE;
11578 orig_addend = rel->r_addend;
11579
11580 if (r_symndx < symtab_hdr->sh_info)
11581 {
11582 /* It's a local symbol. */
11583 struct _opd_sec_data *opd;
11584
11585 sym = local_syms + r_symndx;
11586 sec = local_sections[r_symndx];
11587 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11588 sym_type = ELF64_ST_TYPE (sym->st_info);
11589 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11590 opd = get_opd_info (sec);
11591 if (opd != NULL && opd->adjust != NULL)
11592 {
11593 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11594 if (adjust == -1)
11595 relocation = 0;
11596 else
11597 {
11598 /* If this is a relocation against the opd section sym
11599 and we have edited .opd, adjust the reloc addend so
11600 that ld -r and ld --emit-relocs output is correct.
11601 If it is a reloc against some other .opd symbol,
11602 then the symbol value will be adjusted later. */
11603 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11604 rel->r_addend += adjust;
11605 else
11606 relocation += adjust;
11607 }
11608 }
11609 }
11610 else
11611 {
11612 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11613 r_symndx, symtab_hdr, sym_hashes,
11614 h_elf, sec, relocation,
11615 unresolved_reloc, warned);
11616 sym_name = h_elf->root.root.string;
11617 sym_type = h_elf->type;
11618 }
11619 h = (struct ppc_link_hash_entry *) h_elf;
11620
11621 if (sec != NULL && elf_discarded_section (sec))
11622 {
11623 /* For relocs against symbols from removed linkonce sections,
11624 or sections discarded by a linker script, we just want the
11625 section contents zeroed. Avoid any special processing. */
11626 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
11627 contents + rel->r_offset);
11628 rel->r_info = 0;
11629 rel->r_addend = 0;
11630 continue;
11631 }
11632
11633 if (info->relocatable)
11634 continue;
11635
11636 /* TLS optimizations. Replace instruction sequences and relocs
11637 based on information we collected in tls_optimize. We edit
11638 RELOCS so that --emit-relocs will output something sensible
11639 for the final instruction stream. */
11640 tls_mask = 0;
11641 tls_gd = 0;
11642 toc_symndx = 0;
11643 if (h != NULL)
11644 tls_mask = h->tls_mask;
11645 else if (local_got_ents != NULL)
11646 {
11647 struct plt_entry **local_plt = (struct plt_entry **)
11648 (local_got_ents + symtab_hdr->sh_info);
11649 unsigned char *lgot_masks = (unsigned char *)
11650 (local_plt + symtab_hdr->sh_info);
11651 tls_mask = lgot_masks[r_symndx];
11652 }
11653 if (tls_mask == 0
11654 && (r_type == R_PPC64_TLS
11655 || r_type == R_PPC64_TLSGD
11656 || r_type == R_PPC64_TLSLD))
11657 {
11658 /* Check for toc tls entries. */
11659 unsigned char *toc_tls;
11660
11661 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11662 &local_syms, rel, input_bfd))
11663 return FALSE;
11664
11665 if (toc_tls)
11666 tls_mask = *toc_tls;
11667 }
11668
11669 /* Check that tls relocs are used with tls syms, and non-tls
11670 relocs are used with non-tls syms. */
11671 if (r_symndx != 0
11672 && r_type != R_PPC64_NONE
11673 && (h == NULL
11674 || h->elf.root.type == bfd_link_hash_defined
11675 || h->elf.root.type == bfd_link_hash_defweak)
11676 && (IS_PPC64_TLS_RELOC (r_type)
11677 != (sym_type == STT_TLS
11678 || (sym_type == STT_SECTION
11679 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11680 {
11681 if (tls_mask != 0
11682 && (r_type == R_PPC64_TLS
11683 || r_type == R_PPC64_TLSGD
11684 || r_type == R_PPC64_TLSLD))
11685 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11686 ;
11687 else
11688 (*_bfd_error_handler)
11689 (!IS_PPC64_TLS_RELOC (r_type)
11690 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11691 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11692 input_bfd,
11693 input_section,
11694 (long) rel->r_offset,
11695 ppc64_elf_howto_table[r_type]->name,
11696 sym_name);
11697 }
11698
11699 /* Ensure reloc mapping code below stays sane. */
11700 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11701 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11702 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11703 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11704 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11705 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11706 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11707 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11708 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11709 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11710 abort ();
11711
11712 switch (r_type)
11713 {
11714 default:
11715 break;
11716
11717 case R_PPC64_LO_DS_OPT:
11718 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11719 if ((insn & (0x3f << 26)) != 58u << 26)
11720 abort ();
11721 insn += (14u << 26) - (58u << 26);
11722 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11723 r_type = R_PPC64_TOC16_LO;
11724 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11725 break;
11726
11727 case R_PPC64_TOC16:
11728 case R_PPC64_TOC16_LO:
11729 case R_PPC64_TOC16_DS:
11730 case R_PPC64_TOC16_LO_DS:
11731 {
11732 /* Check for toc tls entries. */
11733 unsigned char *toc_tls;
11734 int retval;
11735
11736 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11737 &local_syms, rel, input_bfd);
11738 if (retval == 0)
11739 return FALSE;
11740
11741 if (toc_tls)
11742 {
11743 tls_mask = *toc_tls;
11744 if (r_type == R_PPC64_TOC16_DS
11745 || r_type == R_PPC64_TOC16_LO_DS)
11746 {
11747 if (tls_mask != 0
11748 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11749 goto toctprel;
11750 }
11751 else
11752 {
11753 /* If we found a GD reloc pair, then we might be
11754 doing a GD->IE transition. */
11755 if (retval == 2)
11756 {
11757 tls_gd = TLS_TPRELGD;
11758 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11759 goto tls_ldgd_opt;
11760 }
11761 else if (retval == 3)
11762 {
11763 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11764 goto tls_ldgd_opt;
11765 }
11766 }
11767 }
11768 }
11769 break;
11770
11771 case R_PPC64_GOT_TPREL16_HI:
11772 case R_PPC64_GOT_TPREL16_HA:
11773 if (tls_mask != 0
11774 && (tls_mask & TLS_TPREL) == 0)
11775 {
11776 rel->r_offset -= d_offset;
11777 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11778 r_type = R_PPC64_NONE;
11779 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11780 }
11781 break;
11782
11783 case R_PPC64_GOT_TPREL16_DS:
11784 case R_PPC64_GOT_TPREL16_LO_DS:
11785 if (tls_mask != 0
11786 && (tls_mask & TLS_TPREL) == 0)
11787 {
11788 toctprel:
11789 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11790 insn &= 31 << 21;
11791 insn |= 0x3c0d0000; /* addis 0,13,0 */
11792 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11793 r_type = R_PPC64_TPREL16_HA;
11794 if (toc_symndx != 0)
11795 {
11796 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11797 rel->r_addend = toc_addend;
11798 /* We changed the symbol. Start over in order to
11799 get h, sym, sec etc. right. */
11800 rel--;
11801 continue;
11802 }
11803 else
11804 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11805 }
11806 break;
11807
11808 case R_PPC64_TLS:
11809 if (tls_mask != 0
11810 && (tls_mask & TLS_TPREL) == 0)
11811 {
11812 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11813 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11814 if (insn == 0)
11815 abort ();
11816 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11817 /* Was PPC64_TLS which sits on insn boundary, now
11818 PPC64_TPREL16_LO which is at low-order half-word. */
11819 rel->r_offset += d_offset;
11820 r_type = R_PPC64_TPREL16_LO;
11821 if (toc_symndx != 0)
11822 {
11823 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11824 rel->r_addend = toc_addend;
11825 /* We changed the symbol. Start over in order to
11826 get h, sym, sec etc. right. */
11827 rel--;
11828 continue;
11829 }
11830 else
11831 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11832 }
11833 break;
11834
11835 case R_PPC64_GOT_TLSGD16_HI:
11836 case R_PPC64_GOT_TLSGD16_HA:
11837 tls_gd = TLS_TPRELGD;
11838 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11839 goto tls_gdld_hi;
11840 break;
11841
11842 case R_PPC64_GOT_TLSLD16_HI:
11843 case R_PPC64_GOT_TLSLD16_HA:
11844 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11845 {
11846 tls_gdld_hi:
11847 if ((tls_mask & tls_gd) != 0)
11848 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11849 + R_PPC64_GOT_TPREL16_DS);
11850 else
11851 {
11852 rel->r_offset -= d_offset;
11853 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11854 r_type = R_PPC64_NONE;
11855 }
11856 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11857 }
11858 break;
11859
11860 case R_PPC64_GOT_TLSGD16:
11861 case R_PPC64_GOT_TLSGD16_LO:
11862 tls_gd = TLS_TPRELGD;
11863 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11864 goto tls_ldgd_opt;
11865 break;
11866
11867 case R_PPC64_GOT_TLSLD16:
11868 case R_PPC64_GOT_TLSLD16_LO:
11869 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11870 {
11871 unsigned int insn1, insn2, insn3;
11872 bfd_vma offset;
11873
11874 tls_ldgd_opt:
11875 offset = (bfd_vma) -1;
11876 /* If not using the newer R_PPC64_TLSGD/LD to mark
11877 __tls_get_addr calls, we must trust that the call
11878 stays with its arg setup insns, ie. that the next
11879 reloc is the __tls_get_addr call associated with
11880 the current reloc. Edit both insns. */
11881 if (input_section->has_tls_get_addr_call
11882 && rel + 1 < relend
11883 && branch_reloc_hash_match (input_bfd, rel + 1,
11884 htab->tls_get_addr,
11885 htab->tls_get_addr_fd))
11886 offset = rel[1].r_offset;
11887 if ((tls_mask & tls_gd) != 0)
11888 {
11889 /* IE */
11890 insn1 = bfd_get_32 (output_bfd,
11891 contents + rel->r_offset - d_offset);
11892 insn1 &= (1 << 26) - (1 << 2);
11893 insn1 |= 58 << 26; /* ld */
11894 insn2 = 0x7c636a14; /* add 3,3,13 */
11895 if (offset != (bfd_vma) -1)
11896 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11897 if ((tls_mask & TLS_EXPLICIT) == 0)
11898 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11899 + R_PPC64_GOT_TPREL16_DS);
11900 else
11901 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11902 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11903 }
11904 else
11905 {
11906 /* LE */
11907 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11908 insn2 = 0x38630000; /* addi 3,3,0 */
11909 if (tls_gd == 0)
11910 {
11911 /* Was an LD reloc. */
11912 if (toc_symndx)
11913 sec = local_sections[toc_symndx];
11914 for (r_symndx = 0;
11915 r_symndx < symtab_hdr->sh_info;
11916 r_symndx++)
11917 if (local_sections[r_symndx] == sec)
11918 break;
11919 if (r_symndx >= symtab_hdr->sh_info)
11920 r_symndx = 0;
11921 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11922 if (r_symndx != 0)
11923 rel->r_addend -= (local_syms[r_symndx].st_value
11924 + sec->output_offset
11925 + sec->output_section->vma);
11926 }
11927 else if (toc_symndx != 0)
11928 {
11929 r_symndx = toc_symndx;
11930 rel->r_addend = toc_addend;
11931 }
11932 r_type = R_PPC64_TPREL16_HA;
11933 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11934 if (offset != (bfd_vma) -1)
11935 {
11936 rel[1].r_info = ELF64_R_INFO (r_symndx,
11937 R_PPC64_TPREL16_LO);
11938 rel[1].r_offset = offset + d_offset;
11939 rel[1].r_addend = rel->r_addend;
11940 }
11941 }
11942 bfd_put_32 (output_bfd, insn1,
11943 contents + rel->r_offset - d_offset);
11944 if (offset != (bfd_vma) -1)
11945 {
11946 insn3 = bfd_get_32 (output_bfd,
11947 contents + offset + 4);
11948 if (insn3 == NOP
11949 || insn3 == CROR_151515 || insn3 == CROR_313131)
11950 {
11951 rel[1].r_offset += 4;
11952 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11953 insn2 = NOP;
11954 }
11955 bfd_put_32 (output_bfd, insn2, contents + offset);
11956 }
11957 if ((tls_mask & tls_gd) == 0
11958 && (tls_gd == 0 || toc_symndx != 0))
11959 {
11960 /* We changed the symbol. Start over in order
11961 to get h, sym, sec etc. right. */
11962 rel--;
11963 continue;
11964 }
11965 }
11966 break;
11967
11968 case R_PPC64_TLSGD:
11969 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11970 {
11971 unsigned int insn2, insn3;
11972 bfd_vma offset = rel->r_offset;
11973
11974 if ((tls_mask & TLS_TPRELGD) != 0)
11975 {
11976 /* IE */
11977 r_type = R_PPC64_NONE;
11978 insn2 = 0x7c636a14; /* add 3,3,13 */
11979 }
11980 else
11981 {
11982 /* LE */
11983 if (toc_symndx != 0)
11984 {
11985 r_symndx = toc_symndx;
11986 rel->r_addend = toc_addend;
11987 }
11988 r_type = R_PPC64_TPREL16_LO;
11989 rel->r_offset = offset + d_offset;
11990 insn2 = 0x38630000; /* addi 3,3,0 */
11991 }
11992 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11993 /* Zap the reloc on the _tls_get_addr call too. */
11994 BFD_ASSERT (offset == rel[1].r_offset);
11995 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11996 insn3 = bfd_get_32 (output_bfd,
11997 contents + offset + 4);
11998 if (insn3 == NOP
11999 || insn3 == CROR_151515 || insn3 == CROR_313131)
12000 {
12001 rel->r_offset += 4;
12002 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12003 insn2 = NOP;
12004 }
12005 bfd_put_32 (output_bfd, insn2, contents + offset);
12006 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12007 {
12008 rel--;
12009 continue;
12010 }
12011 }
12012 break;
12013
12014 case R_PPC64_TLSLD:
12015 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12016 {
12017 unsigned int insn2, insn3;
12018 bfd_vma offset = rel->r_offset;
12019
12020 if (toc_symndx)
12021 sec = local_sections[toc_symndx];
12022 for (r_symndx = 0;
12023 r_symndx < symtab_hdr->sh_info;
12024 r_symndx++)
12025 if (local_sections[r_symndx] == sec)
12026 break;
12027 if (r_symndx >= symtab_hdr->sh_info)
12028 r_symndx = 0;
12029 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12030 if (r_symndx != 0)
12031 rel->r_addend -= (local_syms[r_symndx].st_value
12032 + sec->output_offset
12033 + sec->output_section->vma);
12034
12035 r_type = R_PPC64_TPREL16_LO;
12036 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12037 rel->r_offset = offset + d_offset;
12038 /* Zap the reloc on the _tls_get_addr call too. */
12039 BFD_ASSERT (offset == rel[1].r_offset);
12040 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12041 insn2 = 0x38630000; /* addi 3,3,0 */
12042 insn3 = bfd_get_32 (output_bfd,
12043 contents + offset + 4);
12044 if (insn3 == NOP
12045 || insn3 == CROR_151515 || insn3 == CROR_313131)
12046 {
12047 rel->r_offset += 4;
12048 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12049 insn2 = NOP;
12050 }
12051 bfd_put_32 (output_bfd, insn2, contents + offset);
12052 rel--;
12053 continue;
12054 }
12055 break;
12056
12057 case R_PPC64_DTPMOD64:
12058 if (rel + 1 < relend
12059 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12060 && rel[1].r_offset == rel->r_offset + 8)
12061 {
12062 if ((tls_mask & TLS_GD) == 0)
12063 {
12064 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12065 if ((tls_mask & TLS_TPRELGD) != 0)
12066 r_type = R_PPC64_TPREL64;
12067 else
12068 {
12069 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12070 r_type = R_PPC64_NONE;
12071 }
12072 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12073 }
12074 }
12075 else
12076 {
12077 if ((tls_mask & TLS_LD) == 0)
12078 {
12079 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12080 r_type = R_PPC64_NONE;
12081 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12082 }
12083 }
12084 break;
12085
12086 case R_PPC64_TPREL64:
12087 if ((tls_mask & TLS_TPREL) == 0)
12088 {
12089 r_type = R_PPC64_NONE;
12090 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12091 }
12092 break;
12093 }
12094
12095 /* Handle other relocations that tweak non-addend part of insn. */
12096 insn = 0;
12097 max_br_offset = 1 << 25;
12098 addend = rel->r_addend;
12099 switch (r_type)
12100 {
12101 default:
12102 break;
12103
12104 /* Branch taken prediction relocations. */
12105 case R_PPC64_ADDR14_BRTAKEN:
12106 case R_PPC64_REL14_BRTAKEN:
12107 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12108 /* Fall thru. */
12109
12110 /* Branch not taken prediction relocations. */
12111 case R_PPC64_ADDR14_BRNTAKEN:
12112 case R_PPC64_REL14_BRNTAKEN:
12113 insn |= bfd_get_32 (output_bfd,
12114 contents + rel->r_offset) & ~(0x01 << 21);
12115 /* Fall thru. */
12116
12117 case R_PPC64_REL14:
12118 max_br_offset = 1 << 15;
12119 /* Fall thru. */
12120
12121 case R_PPC64_REL24:
12122 /* Calls to functions with a different TOC, such as calls to
12123 shared objects, need to alter the TOC pointer. This is
12124 done using a linkage stub. A REL24 branching to these
12125 linkage stubs needs to be followed by a nop, as the nop
12126 will be replaced with an instruction to restore the TOC
12127 base pointer. */
12128 fdh = h;
12129 if (h != NULL
12130 && h->oh != NULL
12131 && h->oh->is_func_descriptor)
12132 fdh = ppc_follow_link (h->oh);
12133 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12134 if (stub_entry != NULL
12135 && (stub_entry->stub_type == ppc_stub_plt_call
12136 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12137 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12138 {
12139 bfd_boolean can_plt_call = FALSE;
12140
12141 if (rel->r_offset + 8 <= input_section->size)
12142 {
12143 unsigned long nop;
12144 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12145 if (nop == NOP
12146 || nop == CROR_151515 || nop == CROR_313131)
12147 {
12148 if (h != NULL
12149 && (h == htab->tls_get_addr_fd
12150 || h == htab->tls_get_addr)
12151 && !htab->no_tls_get_addr_opt)
12152 {
12153 /* Special stub used, leave nop alone. */
12154 }
12155 else
12156 bfd_put_32 (input_bfd, LD_R2_40R1,
12157 contents + rel->r_offset + 4);
12158 can_plt_call = TRUE;
12159 }
12160 }
12161
12162 if (!can_plt_call)
12163 {
12164 if (stub_entry->stub_type == ppc_stub_plt_call)
12165 {
12166 /* If this is a plain branch rather than a branch
12167 and link, don't require a nop. However, don't
12168 allow tail calls in a shared library as they
12169 will result in r2 being corrupted. */
12170 unsigned long br;
12171 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12172 if (info->executable && (br & 1) == 0)
12173 can_plt_call = TRUE;
12174 else
12175 stub_entry = NULL;
12176 }
12177 else if (h != NULL
12178 && strcmp (h->elf.root.root.string,
12179 ".__libc_start_main") == 0)
12180 {
12181 /* Allow crt1 branch to go via a toc adjusting stub. */
12182 can_plt_call = TRUE;
12183 }
12184 else
12185 {
12186 if (strcmp (input_section->output_section->name,
12187 ".init") == 0
12188 || strcmp (input_section->output_section->name,
12189 ".fini") == 0)
12190 (*_bfd_error_handler)
12191 (_("%B(%A+0x%lx): automatic multiple TOCs "
12192 "not supported using your crt files; "
12193 "recompile with -mminimal-toc or upgrade gcc"),
12194 input_bfd,
12195 input_section,
12196 (long) rel->r_offset);
12197 else
12198 (*_bfd_error_handler)
12199 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
12200 "does not allow automatic multiple TOCs; "
12201 "recompile with -mminimal-toc or "
12202 "-fno-optimize-sibling-calls, "
12203 "or make `%s' extern"),
12204 input_bfd,
12205 input_section,
12206 (long) rel->r_offset,
12207 sym_name,
12208 sym_name);
12209 bfd_set_error (bfd_error_bad_value);
12210 ret = FALSE;
12211 }
12212 }
12213
12214 if (can_plt_call
12215 && stub_entry->stub_type == ppc_stub_plt_call)
12216 unresolved_reloc = FALSE;
12217 }
12218
12219 if ((stub_entry == NULL
12220 || stub_entry->stub_type == ppc_stub_long_branch
12221 || stub_entry->stub_type == ppc_stub_plt_branch)
12222 && get_opd_info (sec) != NULL)
12223 {
12224 /* The branch destination is the value of the opd entry. */
12225 bfd_vma off = (relocation + addend
12226 - sec->output_section->vma
12227 - sec->output_offset);
12228 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12229 if (dest != (bfd_vma) -1)
12230 {
12231 relocation = dest;
12232 addend = 0;
12233 }
12234 }
12235
12236 /* If the branch is out of reach we ought to have a long
12237 branch stub. */
12238 from = (rel->r_offset
12239 + input_section->output_offset
12240 + input_section->output_section->vma);
12241
12242 if (stub_entry != NULL
12243 && (stub_entry->stub_type == ppc_stub_long_branch
12244 || stub_entry->stub_type == ppc_stub_plt_branch)
12245 && (r_type == R_PPC64_ADDR14_BRTAKEN
12246 || r_type == R_PPC64_ADDR14_BRNTAKEN
12247 || (relocation + addend - from + max_br_offset
12248 < 2 * max_br_offset)))
12249 /* Don't use the stub if this branch is in range. */
12250 stub_entry = NULL;
12251
12252 if (stub_entry != NULL)
12253 {
12254 /* Munge up the value and addend so that we call the stub
12255 rather than the procedure directly. */
12256 relocation = (stub_entry->stub_offset
12257 + stub_entry->stub_sec->output_offset
12258 + stub_entry->stub_sec->output_section->vma);
12259 addend = 0;
12260 }
12261
12262 if (insn != 0)
12263 {
12264 if (is_power4)
12265 {
12266 /* Set 'a' bit. This is 0b00010 in BO field for branch
12267 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12268 for branch on CTR insns (BO == 1a00t or 1a01t). */
12269 if ((insn & (0x14 << 21)) == (0x04 << 21))
12270 insn |= 0x02 << 21;
12271 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12272 insn |= 0x08 << 21;
12273 else
12274 break;
12275 }
12276 else
12277 {
12278 /* Invert 'y' bit if not the default. */
12279 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12280 insn ^= 0x01 << 21;
12281 }
12282
12283 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12284 }
12285
12286 /* NOP out calls to undefined weak functions.
12287 We can thus call a weak function without first
12288 checking whether the function is defined. */
12289 else if (h != NULL
12290 && h->elf.root.type == bfd_link_hash_undefweak
12291 && h->elf.dynindx == -1
12292 && r_type == R_PPC64_REL24
12293 && relocation == 0
12294 && addend == 0)
12295 {
12296 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12297 continue;
12298 }
12299 break;
12300 }
12301
12302 /* Set `addend'. */
12303 tls_type = 0;
12304 switch (r_type)
12305 {
12306 default:
12307 (*_bfd_error_handler)
12308 (_("%B: unknown relocation type %d for symbol %s"),
12309 input_bfd, (int) r_type, sym_name);
12310
12311 bfd_set_error (bfd_error_bad_value);
12312 ret = FALSE;
12313 continue;
12314
12315 case R_PPC64_NONE:
12316 case R_PPC64_TLS:
12317 case R_PPC64_TLSGD:
12318 case R_PPC64_TLSLD:
12319 case R_PPC64_GNU_VTINHERIT:
12320 case R_PPC64_GNU_VTENTRY:
12321 continue;
12322
12323 /* GOT16 relocations. Like an ADDR16 using the symbol's
12324 address in the GOT as relocation value instead of the
12325 symbol's value itself. Also, create a GOT entry for the
12326 symbol and put the symbol value there. */
12327 case R_PPC64_GOT_TLSGD16:
12328 case R_PPC64_GOT_TLSGD16_LO:
12329 case R_PPC64_GOT_TLSGD16_HI:
12330 case R_PPC64_GOT_TLSGD16_HA:
12331 tls_type = TLS_TLS | TLS_GD;
12332 goto dogot;
12333
12334 case R_PPC64_GOT_TLSLD16:
12335 case R_PPC64_GOT_TLSLD16_LO:
12336 case R_PPC64_GOT_TLSLD16_HI:
12337 case R_PPC64_GOT_TLSLD16_HA:
12338 tls_type = TLS_TLS | TLS_LD;
12339 goto dogot;
12340
12341 case R_PPC64_GOT_TPREL16_DS:
12342 case R_PPC64_GOT_TPREL16_LO_DS:
12343 case R_PPC64_GOT_TPREL16_HI:
12344 case R_PPC64_GOT_TPREL16_HA:
12345 tls_type = TLS_TLS | TLS_TPREL;
12346 goto dogot;
12347
12348 case R_PPC64_GOT_DTPREL16_DS:
12349 case R_PPC64_GOT_DTPREL16_LO_DS:
12350 case R_PPC64_GOT_DTPREL16_HI:
12351 case R_PPC64_GOT_DTPREL16_HA:
12352 tls_type = TLS_TLS | TLS_DTPREL;
12353 goto dogot;
12354
12355 case R_PPC64_GOT16:
12356 case R_PPC64_GOT16_LO:
12357 case R_PPC64_GOT16_HI:
12358 case R_PPC64_GOT16_HA:
12359 case R_PPC64_GOT16_DS:
12360 case R_PPC64_GOT16_LO_DS:
12361 dogot:
12362 {
12363 /* Relocation is to the entry for this symbol in the global
12364 offset table. */
12365 asection *got;
12366 bfd_vma *offp;
12367 bfd_vma off;
12368 unsigned long indx = 0;
12369 struct got_entry *ent;
12370
12371 if (tls_type == (TLS_TLS | TLS_LD)
12372 && (h == NULL
12373 || !h->elf.def_dynamic))
12374 ent = ppc64_tlsld_got (input_bfd);
12375 else
12376 {
12377
12378 if (h != NULL)
12379 {
12380 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12381 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12382 &h->elf)
12383 || (info->shared
12384 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
12385 /* This is actually a static link, or it is a
12386 -Bsymbolic link and the symbol is defined
12387 locally, or the symbol was forced to be local
12388 because of a version file. */
12389 ;
12390 else
12391 {
12392 indx = h->elf.dynindx;
12393 unresolved_reloc = FALSE;
12394 }
12395 ent = h->elf.got.glist;
12396 }
12397 else
12398 {
12399 if (local_got_ents == NULL)
12400 abort ();
12401 ent = local_got_ents[r_symndx];
12402 }
12403
12404 for (; ent != NULL; ent = ent->next)
12405 if (ent->addend == orig_addend
12406 && ent->owner == input_bfd
12407 && ent->tls_type == tls_type)
12408 break;
12409 }
12410
12411 if (ent == NULL)
12412 abort ();
12413 if (ent->is_indirect)
12414 ent = ent->got.ent;
12415 offp = &ent->got.offset;
12416 got = ppc64_elf_tdata (ent->owner)->got;
12417 if (got == NULL)
12418 abort ();
12419
12420 /* The offset must always be a multiple of 8. We use the
12421 least significant bit to record whether we have already
12422 processed this entry. */
12423 off = *offp;
12424 if ((off & 1) != 0)
12425 off &= ~1;
12426 else
12427 {
12428 /* Generate relocs for the dynamic linker, except in
12429 the case of TLSLD where we'll use one entry per
12430 module. */
12431 asection *relgot;
12432 bfd_boolean ifunc;
12433
12434 *offp = off | 1;
12435 relgot = NULL;
12436 ifunc = (h != NULL
12437 ? h->elf.type == STT_GNU_IFUNC
12438 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12439 if ((info->shared || indx != 0)
12440 && (h == NULL
12441 || (tls_type == (TLS_TLS | TLS_LD)
12442 && !h->elf.def_dynamic)
12443 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12444 || h->elf.root.type != bfd_link_hash_undefweak))
12445 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12446 else if (ifunc)
12447 relgot = htab->reliplt;
12448 if (relgot != NULL)
12449 {
12450 outrel.r_offset = (got->output_section->vma
12451 + got->output_offset
12452 + off);
12453 outrel.r_addend = addend;
12454 if (tls_type & (TLS_LD | TLS_GD))
12455 {
12456 outrel.r_addend = 0;
12457 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12458 if (tls_type == (TLS_TLS | TLS_GD))
12459 {
12460 loc = relgot->contents;
12461 loc += (relgot->reloc_count++
12462 * sizeof (Elf64_External_Rela));
12463 bfd_elf64_swap_reloca_out (output_bfd,
12464 &outrel, loc);
12465 outrel.r_offset += 8;
12466 outrel.r_addend = addend;
12467 outrel.r_info
12468 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12469 }
12470 }
12471 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12472 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12473 else if (tls_type == (TLS_TLS | TLS_TPREL))
12474 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12475 else if (indx != 0)
12476 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12477 else
12478 {
12479 if (ifunc)
12480 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12481 else
12482 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12483
12484 /* Write the .got section contents for the sake
12485 of prelink. */
12486 loc = got->contents + off;
12487 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12488 loc);
12489 }
12490
12491 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12492 {
12493 outrel.r_addend += relocation;
12494 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12495 outrel.r_addend -= htab->elf.tls_sec->vma;
12496 }
12497 loc = relgot->contents;
12498 loc += (relgot->reloc_count++
12499 * sizeof (Elf64_External_Rela));
12500 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12501 }
12502
12503 /* Init the .got section contents here if we're not
12504 emitting a reloc. */
12505 else
12506 {
12507 relocation += addend;
12508 if (tls_type == (TLS_TLS | TLS_LD))
12509 relocation = 1;
12510 else if (tls_type != 0)
12511 {
12512 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12513 if (tls_type == (TLS_TLS | TLS_TPREL))
12514 relocation += DTP_OFFSET - TP_OFFSET;
12515
12516 if (tls_type == (TLS_TLS | TLS_GD))
12517 {
12518 bfd_put_64 (output_bfd, relocation,
12519 got->contents + off + 8);
12520 relocation = 1;
12521 }
12522 }
12523
12524 bfd_put_64 (output_bfd, relocation,
12525 got->contents + off);
12526 }
12527 }
12528
12529 if (off >= (bfd_vma) -2)
12530 abort ();
12531
12532 relocation = got->output_section->vma + got->output_offset + off;
12533 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12534 }
12535 break;
12536
12537 case R_PPC64_PLT16_HA:
12538 case R_PPC64_PLT16_HI:
12539 case R_PPC64_PLT16_LO:
12540 case R_PPC64_PLT32:
12541 case R_PPC64_PLT64:
12542 /* Relocation is to the entry for this symbol in the
12543 procedure linkage table. */
12544
12545 /* Resolve a PLT reloc against a local symbol directly,
12546 without using the procedure linkage table. */
12547 if (h == NULL)
12548 break;
12549
12550 /* It's possible that we didn't make a PLT entry for this
12551 symbol. This happens when statically linking PIC code,
12552 or when using -Bsymbolic. Go find a match if there is a
12553 PLT entry. */
12554 if (htab->plt != NULL)
12555 {
12556 struct plt_entry *ent;
12557 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12558 if (ent->addend == orig_addend
12559 && ent->plt.offset != (bfd_vma) -1)
12560 {
12561 relocation = (htab->plt->output_section->vma
12562 + htab->plt->output_offset
12563 + ent->plt.offset);
12564 unresolved_reloc = FALSE;
12565 }
12566 }
12567 break;
12568
12569 case R_PPC64_TOC:
12570 /* Relocation value is TOC base. */
12571 relocation = TOCstart;
12572 if (r_symndx == 0)
12573 relocation += htab->stub_group[input_section->id].toc_off;
12574 else if (unresolved_reloc)
12575 ;
12576 else if (sec != NULL && sec->id <= htab->top_id)
12577 relocation += htab->stub_group[sec->id].toc_off;
12578 else
12579 unresolved_reloc = TRUE;
12580 goto dodyn;
12581
12582 /* TOC16 relocs. We want the offset relative to the TOC base,
12583 which is the address of the start of the TOC plus 0x8000.
12584 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12585 in this order. */
12586 case R_PPC64_TOC16:
12587 case R_PPC64_TOC16_LO:
12588 case R_PPC64_TOC16_HI:
12589 case R_PPC64_TOC16_DS:
12590 case R_PPC64_TOC16_LO_DS:
12591 case R_PPC64_TOC16_HA:
12592 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12593 break;
12594
12595 /* Relocate against the beginning of the section. */
12596 case R_PPC64_SECTOFF:
12597 case R_PPC64_SECTOFF_LO:
12598 case R_PPC64_SECTOFF_HI:
12599 case R_PPC64_SECTOFF_DS:
12600 case R_PPC64_SECTOFF_LO_DS:
12601 case R_PPC64_SECTOFF_HA:
12602 if (sec != NULL)
12603 addend -= sec->output_section->vma;
12604 break;
12605
12606 case R_PPC64_REL16:
12607 case R_PPC64_REL16_LO:
12608 case R_PPC64_REL16_HI:
12609 case R_PPC64_REL16_HA:
12610 break;
12611
12612 case R_PPC64_REL14:
12613 case R_PPC64_REL14_BRNTAKEN:
12614 case R_PPC64_REL14_BRTAKEN:
12615 case R_PPC64_REL24:
12616 break;
12617
12618 case R_PPC64_TPREL16:
12619 case R_PPC64_TPREL16_LO:
12620 case R_PPC64_TPREL16_HI:
12621 case R_PPC64_TPREL16_HA:
12622 case R_PPC64_TPREL16_DS:
12623 case R_PPC64_TPREL16_LO_DS:
12624 case R_PPC64_TPREL16_HIGHER:
12625 case R_PPC64_TPREL16_HIGHERA:
12626 case R_PPC64_TPREL16_HIGHEST:
12627 case R_PPC64_TPREL16_HIGHESTA:
12628 if (h != NULL
12629 && h->elf.root.type == bfd_link_hash_undefweak
12630 && h->elf.dynindx == -1)
12631 {
12632 /* Make this relocation against an undefined weak symbol
12633 resolve to zero. This is really just a tweak, since
12634 code using weak externs ought to check that they are
12635 defined before using them. */
12636 bfd_byte *p = contents + rel->r_offset - d_offset;
12637
12638 insn = bfd_get_32 (output_bfd, p);
12639 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12640 if (insn != 0)
12641 bfd_put_32 (output_bfd, insn, p);
12642 break;
12643 }
12644 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12645 if (info->shared)
12646 /* The TPREL16 relocs shouldn't really be used in shared
12647 libs as they will result in DT_TEXTREL being set, but
12648 support them anyway. */
12649 goto dodyn;
12650 break;
12651
12652 case R_PPC64_DTPREL16:
12653 case R_PPC64_DTPREL16_LO:
12654 case R_PPC64_DTPREL16_HI:
12655 case R_PPC64_DTPREL16_HA:
12656 case R_PPC64_DTPREL16_DS:
12657 case R_PPC64_DTPREL16_LO_DS:
12658 case R_PPC64_DTPREL16_HIGHER:
12659 case R_PPC64_DTPREL16_HIGHERA:
12660 case R_PPC64_DTPREL16_HIGHEST:
12661 case R_PPC64_DTPREL16_HIGHESTA:
12662 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12663 break;
12664
12665 case R_PPC64_DTPMOD64:
12666 relocation = 1;
12667 addend = 0;
12668 goto dodyn;
12669
12670 case R_PPC64_TPREL64:
12671 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12672 goto dodyn;
12673
12674 case R_PPC64_DTPREL64:
12675 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12676 /* Fall thru */
12677
12678 /* Relocations that may need to be propagated if this is a
12679 dynamic object. */
12680 case R_PPC64_REL30:
12681 case R_PPC64_REL32:
12682 case R_PPC64_REL64:
12683 case R_PPC64_ADDR14:
12684 case R_PPC64_ADDR14_BRNTAKEN:
12685 case R_PPC64_ADDR14_BRTAKEN:
12686 case R_PPC64_ADDR16:
12687 case R_PPC64_ADDR16_DS:
12688 case R_PPC64_ADDR16_HA:
12689 case R_PPC64_ADDR16_HI:
12690 case R_PPC64_ADDR16_HIGHER:
12691 case R_PPC64_ADDR16_HIGHERA:
12692 case R_PPC64_ADDR16_HIGHEST:
12693 case R_PPC64_ADDR16_HIGHESTA:
12694 case R_PPC64_ADDR16_LO:
12695 case R_PPC64_ADDR16_LO_DS:
12696 case R_PPC64_ADDR24:
12697 case R_PPC64_ADDR32:
12698 case R_PPC64_ADDR64:
12699 case R_PPC64_UADDR16:
12700 case R_PPC64_UADDR32:
12701 case R_PPC64_UADDR64:
12702 dodyn:
12703 if ((input_section->flags & SEC_ALLOC) == 0)
12704 break;
12705
12706 if (NO_OPD_RELOCS && is_opd)
12707 break;
12708
12709 if ((info->shared
12710 && (h == NULL
12711 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12712 || h->elf.root.type != bfd_link_hash_undefweak)
12713 && (must_be_dyn_reloc (info, r_type)
12714 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12715 || (ELIMINATE_COPY_RELOCS
12716 && !info->shared
12717 && h != NULL
12718 && h->elf.dynindx != -1
12719 && !h->elf.non_got_ref
12720 && !h->elf.def_regular)
12721 || (!info->shared
12722 && (h != NULL
12723 ? h->elf.type == STT_GNU_IFUNC
12724 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12725 {
12726 bfd_boolean skip, relocate;
12727 asection *sreloc;
12728 bfd_vma out_off;
12729
12730 /* When generating a dynamic object, these relocations
12731 are copied into the output file to be resolved at run
12732 time. */
12733
12734 skip = FALSE;
12735 relocate = FALSE;
12736
12737 out_off = _bfd_elf_section_offset (output_bfd, info,
12738 input_section, rel->r_offset);
12739 if (out_off == (bfd_vma) -1)
12740 skip = TRUE;
12741 else if (out_off == (bfd_vma) -2)
12742 skip = TRUE, relocate = TRUE;
12743 out_off += (input_section->output_section->vma
12744 + input_section->output_offset);
12745 outrel.r_offset = out_off;
12746 outrel.r_addend = rel->r_addend;
12747
12748 /* Optimize unaligned reloc use. */
12749 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12750 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12751 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12752 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12753 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12754 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12755 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12756 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12757 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12758
12759 if (skip)
12760 memset (&outrel, 0, sizeof outrel);
12761 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
12762 && !is_opd
12763 && r_type != R_PPC64_TOC)
12764 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12765 else
12766 {
12767 /* This symbol is local, or marked to become local,
12768 or this is an opd section reloc which must point
12769 at a local function. */
12770 outrel.r_addend += relocation;
12771 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12772 {
12773 if (is_opd && h != NULL)
12774 {
12775 /* Lie about opd entries. This case occurs
12776 when building shared libraries and we
12777 reference a function in another shared
12778 lib. The same thing happens for a weak
12779 definition in an application that's
12780 overridden by a strong definition in a
12781 shared lib. (I believe this is a generic
12782 bug in binutils handling of weak syms.)
12783 In these cases we won't use the opd
12784 entry in this lib. */
12785 unresolved_reloc = FALSE;
12786 }
12787 if (!is_opd
12788 && r_type == R_PPC64_ADDR64
12789 && (h != NULL
12790 ? h->elf.type == STT_GNU_IFUNC
12791 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12792 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12793 else
12794 {
12795 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12796
12797 /* We need to relocate .opd contents for ld.so.
12798 Prelink also wants simple and consistent rules
12799 for relocs. This make all RELATIVE relocs have
12800 *r_offset equal to r_addend. */
12801 relocate = TRUE;
12802 }
12803 }
12804 else
12805 {
12806 long indx = 0;
12807
12808 if (h != NULL
12809 ? h->elf.type == STT_GNU_IFUNC
12810 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12811 {
12812 (*_bfd_error_handler)
12813 (_("%B(%A+0x%lx): relocation %s for indirect "
12814 "function %s unsupported"),
12815 input_bfd,
12816 input_section,
12817 (long) rel->r_offset,
12818 ppc64_elf_howto_table[r_type]->name,
12819 sym_name);
12820 ret = FALSE;
12821 }
12822 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12823 ;
12824 else if (sec == NULL || sec->owner == NULL)
12825 {
12826 bfd_set_error (bfd_error_bad_value);
12827 return FALSE;
12828 }
12829 else
12830 {
12831 asection *osec;
12832
12833 osec = sec->output_section;
12834 indx = elf_section_data (osec)->dynindx;
12835
12836 if (indx == 0)
12837 {
12838 if ((osec->flags & SEC_READONLY) == 0
12839 && htab->elf.data_index_section != NULL)
12840 osec = htab->elf.data_index_section;
12841 else
12842 osec = htab->elf.text_index_section;
12843 indx = elf_section_data (osec)->dynindx;
12844 }
12845 BFD_ASSERT (indx != 0);
12846
12847 /* We are turning this relocation into one
12848 against a section symbol, so subtract out
12849 the output section's address but not the
12850 offset of the input section in the output
12851 section. */
12852 outrel.r_addend -= osec->vma;
12853 }
12854
12855 outrel.r_info = ELF64_R_INFO (indx, r_type);
12856 }
12857 }
12858
12859 sreloc = elf_section_data (input_section)->sreloc;
12860 if (!htab->elf.dynamic_sections_created)
12861 sreloc = htab->reliplt;
12862 if (sreloc == NULL)
12863 abort ();
12864
12865 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12866 >= sreloc->size)
12867 abort ();
12868 loc = sreloc->contents;
12869 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12870 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12871
12872 /* If this reloc is against an external symbol, it will
12873 be computed at runtime, so there's no need to do
12874 anything now. However, for the sake of prelink ensure
12875 that the section contents are a known value. */
12876 if (! relocate)
12877 {
12878 unresolved_reloc = FALSE;
12879 /* The value chosen here is quite arbitrary as ld.so
12880 ignores section contents except for the special
12881 case of .opd where the contents might be accessed
12882 before relocation. Choose zero, as that won't
12883 cause reloc overflow. */
12884 relocation = 0;
12885 addend = 0;
12886 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12887 to improve backward compatibility with older
12888 versions of ld. */
12889 if (r_type == R_PPC64_ADDR64)
12890 addend = outrel.r_addend;
12891 /* Adjust pc_relative relocs to have zero in *r_offset. */
12892 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12893 addend = (input_section->output_section->vma
12894 + input_section->output_offset
12895 + rel->r_offset);
12896 }
12897 }
12898 break;
12899
12900 case R_PPC64_COPY:
12901 case R_PPC64_GLOB_DAT:
12902 case R_PPC64_JMP_SLOT:
12903 case R_PPC64_JMP_IREL:
12904 case R_PPC64_RELATIVE:
12905 /* We shouldn't ever see these dynamic relocs in relocatable
12906 files. */
12907 /* Fall through. */
12908
12909 case R_PPC64_PLTGOT16:
12910 case R_PPC64_PLTGOT16_DS:
12911 case R_PPC64_PLTGOT16_HA:
12912 case R_PPC64_PLTGOT16_HI:
12913 case R_PPC64_PLTGOT16_LO:
12914 case R_PPC64_PLTGOT16_LO_DS:
12915 case R_PPC64_PLTREL32:
12916 case R_PPC64_PLTREL64:
12917 /* These ones haven't been implemented yet. */
12918
12919 (*_bfd_error_handler)
12920 (_("%B: relocation %s is not supported for symbol %s."),
12921 input_bfd,
12922 ppc64_elf_howto_table[r_type]->name, sym_name);
12923
12924 bfd_set_error (bfd_error_invalid_operation);
12925 ret = FALSE;
12926 continue;
12927 }
12928
12929 /* Multi-instruction sequences that access the TOC can be
12930 optimized, eg. addis ra,r2,0; addi rb,ra,x;
12931 to nop; addi rb,r2,x; */
12932 switch (r_type)
12933 {
12934 default:
12935 break;
12936
12937 case R_PPC64_GOT_TLSLD16_HI:
12938 case R_PPC64_GOT_TLSGD16_HI:
12939 case R_PPC64_GOT_TPREL16_HI:
12940 case R_PPC64_GOT_DTPREL16_HI:
12941 case R_PPC64_GOT16_HI:
12942 case R_PPC64_TOC16_HI:
12943 /* These relocs would only be useful if building up an
12944 offset to later add to r2, perhaps in an indexed
12945 addressing mode instruction. Don't try to optimize.
12946 Unfortunately, the possibility of someone building up an
12947 offset like this or even with the HA relocs, means that
12948 we need to check the high insn when optimizing the low
12949 insn. */
12950 break;
12951
12952 case R_PPC64_GOT_TLSLD16_HA:
12953 case R_PPC64_GOT_TLSGD16_HA:
12954 case R_PPC64_GOT_TPREL16_HA:
12955 case R_PPC64_GOT_DTPREL16_HA:
12956 case R_PPC64_GOT16_HA:
12957 case R_PPC64_TOC16_HA:
12958 /* nop is done later. */
12959 break;
12960
12961 case R_PPC64_GOT_TLSLD16_LO:
12962 case R_PPC64_GOT_TLSGD16_LO:
12963 case R_PPC64_GOT_TPREL16_LO_DS:
12964 case R_PPC64_GOT_DTPREL16_LO_DS:
12965 case R_PPC64_GOT16_LO:
12966 case R_PPC64_GOT16_LO_DS:
12967 case R_PPC64_TOC16_LO:
12968 case R_PPC64_TOC16_LO_DS:
12969 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
12970 {
12971 bfd_byte *p = contents + (rel->r_offset & ~3);
12972 insn = bfd_get_32 (input_bfd, p);
12973 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
12974 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
12975 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
12976 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
12977 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
12978 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
12979 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
12980 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
12981 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
12982 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
12983 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
12984 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
12985 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
12986 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
12987 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
12988 && (insn & 3) != 1)
12989 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
12990 && ((insn & 3) == 0 || (insn & 3) == 3)))
12991 {
12992 unsigned int reg = (insn >> 16) & 0x1f;
12993 const Elf_Internal_Rela *ha;
12994 bfd_boolean match_addend;
12995
12996 match_addend = (sym != NULL
12997 && ELF_ST_TYPE (sym->st_info) == STT_SECTION);
12998 ha = ha_reloc_match (relocs, rel, &reg, match_addend,
12999 input_bfd, contents);
13000 if (ha != NULL)
13001 {
13002 insn &= ~(0x1f << 16);
13003 insn |= reg << 16;
13004 bfd_put_32 (input_bfd, insn, p);
13005 if (ha_opt == NULL)
13006 {
13007 ha_opt = bfd_zmalloc (input_section->reloc_count);
13008 if (ha_opt == NULL)
13009 return FALSE;
13010 }
13011 ha_opt[ha - relocs] = 1;
13012 }
13013 else
13014 /* If we don't find a matching high part insn,
13015 something is fishy. Refuse to nop any high
13016 part insn in this section. */
13017 no_ha_opt = TRUE;
13018 }
13019 }
13020 break;
13021 }
13022
13023 /* Do any further special processing. */
13024 switch (r_type)
13025 {
13026 default:
13027 break;
13028
13029 case R_PPC64_ADDR16_HA:
13030 case R_PPC64_REL16_HA:
13031 case R_PPC64_ADDR16_HIGHERA:
13032 case R_PPC64_ADDR16_HIGHESTA:
13033 case R_PPC64_TOC16_HA:
13034 case R_PPC64_SECTOFF_HA:
13035 case R_PPC64_TPREL16_HA:
13036 case R_PPC64_DTPREL16_HA:
13037 case R_PPC64_TPREL16_HIGHER:
13038 case R_PPC64_TPREL16_HIGHERA:
13039 case R_PPC64_TPREL16_HIGHEST:
13040 case R_PPC64_TPREL16_HIGHESTA:
13041 case R_PPC64_DTPREL16_HIGHER:
13042 case R_PPC64_DTPREL16_HIGHERA:
13043 case R_PPC64_DTPREL16_HIGHEST:
13044 case R_PPC64_DTPREL16_HIGHESTA:
13045 /* It's just possible that this symbol is a weak symbol
13046 that's not actually defined anywhere. In that case,
13047 'sec' would be NULL, and we should leave the symbol
13048 alone (it will be set to zero elsewhere in the link). */
13049 if (sec == NULL)
13050 break;
13051 /* Fall thru */
13052
13053 case R_PPC64_GOT16_HA:
13054 case R_PPC64_PLTGOT16_HA:
13055 case R_PPC64_PLT16_HA:
13056 case R_PPC64_GOT_TLSGD16_HA:
13057 case R_PPC64_GOT_TLSLD16_HA:
13058 case R_PPC64_GOT_TPREL16_HA:
13059 case R_PPC64_GOT_DTPREL16_HA:
13060 /* Add 0x10000 if sign bit in 0:15 is set.
13061 Bits 0:15 are not used. */
13062 addend += 0x8000;
13063 break;
13064
13065 case R_PPC64_ADDR16_DS:
13066 case R_PPC64_ADDR16_LO_DS:
13067 case R_PPC64_GOT16_DS:
13068 case R_PPC64_GOT16_LO_DS:
13069 case R_PPC64_PLT16_LO_DS:
13070 case R_PPC64_SECTOFF_DS:
13071 case R_PPC64_SECTOFF_LO_DS:
13072 case R_PPC64_TOC16_DS:
13073 case R_PPC64_TOC16_LO_DS:
13074 case R_PPC64_PLTGOT16_DS:
13075 case R_PPC64_PLTGOT16_LO_DS:
13076 case R_PPC64_GOT_TPREL16_DS:
13077 case R_PPC64_GOT_TPREL16_LO_DS:
13078 case R_PPC64_GOT_DTPREL16_DS:
13079 case R_PPC64_GOT_DTPREL16_LO_DS:
13080 case R_PPC64_TPREL16_DS:
13081 case R_PPC64_TPREL16_LO_DS:
13082 case R_PPC64_DTPREL16_DS:
13083 case R_PPC64_DTPREL16_LO_DS:
13084 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13085 mask = 3;
13086 /* If this reloc is against an lq insn, then the value must be
13087 a multiple of 16. This is somewhat of a hack, but the
13088 "correct" way to do this by defining _DQ forms of all the
13089 _DS relocs bloats all reloc switches in this file. It
13090 doesn't seem to make much sense to use any of these relocs
13091 in data, so testing the insn should be safe. */
13092 if ((insn & (0x3f << 26)) == (56u << 26))
13093 mask = 15;
13094 if (((relocation + addend) & mask) != 0)
13095 {
13096 (*_bfd_error_handler)
13097 (_("%B: error: relocation %s not a multiple of %d"),
13098 input_bfd,
13099 ppc64_elf_howto_table[r_type]->name,
13100 mask + 1);
13101 bfd_set_error (bfd_error_bad_value);
13102 ret = FALSE;
13103 continue;
13104 }
13105 break;
13106 }
13107
13108 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13109 because such sections are not SEC_ALLOC and thus ld.so will
13110 not process them. */
13111 if (unresolved_reloc
13112 && !((input_section->flags & SEC_DEBUGGING) != 0
13113 && h->elf.def_dynamic))
13114 {
13115 (*_bfd_error_handler)
13116 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
13117 input_bfd,
13118 input_section,
13119 (long) rel->r_offset,
13120 ppc64_elf_howto_table[(int) r_type]->name,
13121 h->elf.root.root.string);
13122 ret = FALSE;
13123 }
13124
13125 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13126 input_bfd,
13127 input_section,
13128 contents,
13129 rel->r_offset,
13130 relocation,
13131 addend);
13132
13133 if (r != bfd_reloc_ok)
13134 {
13135 if (sym_name == NULL)
13136 sym_name = "(null)";
13137 if (r == bfd_reloc_overflow)
13138 {
13139 if (warned)
13140 continue;
13141 if (h != NULL
13142 && h->elf.root.type == bfd_link_hash_undefweak
13143 && ppc64_elf_howto_table[r_type]->pc_relative)
13144 {
13145 /* Assume this is a call protected by other code that
13146 detects the symbol is undefined. If this is the case,
13147 we can safely ignore the overflow. If not, the
13148 program is hosed anyway, and a little warning isn't
13149 going to help. */
13150
13151 continue;
13152 }
13153
13154 if (!((*info->callbacks->reloc_overflow)
13155 (info, (h ? &h->elf.root : NULL), sym_name,
13156 ppc64_elf_howto_table[r_type]->name,
13157 orig_addend, input_bfd, input_section, rel->r_offset)))
13158 return FALSE;
13159 }
13160 else
13161 {
13162 (*_bfd_error_handler)
13163 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
13164 input_bfd,
13165 input_section,
13166 (long) rel->r_offset,
13167 ppc64_elf_howto_table[r_type]->name,
13168 sym_name,
13169 (int) r);
13170 ret = FALSE;
13171 }
13172 }
13173 }
13174
13175 if (ha_opt != NULL)
13176 {
13177 if (!no_ha_opt)
13178 {
13179 unsigned char *opt = ha_opt;
13180 rel = relocs;
13181 relend = relocs + input_section->reloc_count;
13182 for (; rel < relend; opt++, rel++)
13183 if (*opt != 0)
13184 {
13185 bfd_byte *p = contents + (rel->r_offset & ~3);
13186 bfd_put_32 (input_bfd, NOP, p);
13187 }
13188 }
13189 free (ha_opt);
13190 }
13191
13192 /* If we're emitting relocations, then shortly after this function
13193 returns, reloc offsets and addends for this section will be
13194 adjusted. Worse, reloc symbol indices will be for the output
13195 file rather than the input. Save a copy of the relocs for
13196 opd_entry_value. */
13197 if (is_opd && (info->emitrelocations || info->relocatable))
13198 {
13199 bfd_size_type amt;
13200 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13201 rel = bfd_alloc (input_bfd, amt);
13202 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13203 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13204 if (rel == NULL)
13205 return FALSE;
13206 memcpy (rel, relocs, amt);
13207 }
13208 return ret;
13209 }
13210
13211 /* Adjust the value of any local symbols in opd sections. */
13212
13213 static int
13214 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13215 const char *name ATTRIBUTE_UNUSED,
13216 Elf_Internal_Sym *elfsym,
13217 asection *input_sec,
13218 struct elf_link_hash_entry *h)
13219 {
13220 struct _opd_sec_data *opd;
13221 long adjust;
13222 bfd_vma value;
13223
13224 if (h != NULL)
13225 return 1;
13226
13227 opd = get_opd_info (input_sec);
13228 if (opd == NULL || opd->adjust == NULL)
13229 return 1;
13230
13231 value = elfsym->st_value - input_sec->output_offset;
13232 if (!info->relocatable)
13233 value -= input_sec->output_section->vma;
13234
13235 adjust = opd->adjust[value / 8];
13236 if (adjust == -1)
13237 return 2;
13238
13239 elfsym->st_value += adjust;
13240 return 1;
13241 }
13242
13243 /* Finish up dynamic symbol handling. We set the contents of various
13244 dynamic sections here. */
13245
13246 static bfd_boolean
13247 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13248 struct bfd_link_info *info,
13249 struct elf_link_hash_entry *h,
13250 Elf_Internal_Sym *sym)
13251 {
13252 struct ppc_link_hash_table *htab;
13253 struct plt_entry *ent;
13254 Elf_Internal_Rela rela;
13255 bfd_byte *loc;
13256
13257 htab = ppc_hash_table (info);
13258 if (htab == NULL)
13259 return FALSE;
13260
13261 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13262 if (ent->plt.offset != (bfd_vma) -1)
13263 {
13264 /* This symbol has an entry in the procedure linkage
13265 table. Set it up. */
13266 if (!htab->elf.dynamic_sections_created
13267 || h->dynindx == -1)
13268 {
13269 BFD_ASSERT (h->type == STT_GNU_IFUNC
13270 && h->def_regular
13271 && (h->root.type == bfd_link_hash_defined
13272 || h->root.type == bfd_link_hash_defweak));
13273 rela.r_offset = (htab->iplt->output_section->vma
13274 + htab->iplt->output_offset
13275 + ent->plt.offset);
13276 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13277 rela.r_addend = (h->root.u.def.value
13278 + h->root.u.def.section->output_offset
13279 + h->root.u.def.section->output_section->vma
13280 + ent->addend);
13281 loc = (htab->reliplt->contents
13282 + (htab->reliplt->reloc_count++
13283 * sizeof (Elf64_External_Rela)));
13284 }
13285 else
13286 {
13287 rela.r_offset = (htab->plt->output_section->vma
13288 + htab->plt->output_offset
13289 + ent->plt.offset);
13290 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13291 rela.r_addend = ent->addend;
13292 loc = (htab->relplt->contents
13293 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13294 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13295 }
13296 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13297 }
13298
13299 if (h->needs_copy)
13300 {
13301 /* This symbol needs a copy reloc. Set it up. */
13302
13303 if (h->dynindx == -1
13304 || (h->root.type != bfd_link_hash_defined
13305 && h->root.type != bfd_link_hash_defweak)
13306 || htab->relbss == NULL)
13307 abort ();
13308
13309 rela.r_offset = (h->root.u.def.value
13310 + h->root.u.def.section->output_section->vma
13311 + h->root.u.def.section->output_offset);
13312 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13313 rela.r_addend = 0;
13314 loc = htab->relbss->contents;
13315 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13316 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13317 }
13318
13319 /* Mark some specially defined symbols as absolute. */
13320 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13321 sym->st_shndx = SHN_ABS;
13322
13323 return TRUE;
13324 }
13325
13326 /* Used to decide how to sort relocs in an optimal manner for the
13327 dynamic linker, before writing them out. */
13328
13329 static enum elf_reloc_type_class
13330 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13331 {
13332 enum elf_ppc64_reloc_type r_type;
13333
13334 r_type = ELF64_R_TYPE (rela->r_info);
13335 switch (r_type)
13336 {
13337 case R_PPC64_RELATIVE:
13338 return reloc_class_relative;
13339 case R_PPC64_JMP_SLOT:
13340 return reloc_class_plt;
13341 case R_PPC64_COPY:
13342 return reloc_class_copy;
13343 default:
13344 return reloc_class_normal;
13345 }
13346 }
13347
13348 /* Finish up the dynamic sections. */
13349
13350 static bfd_boolean
13351 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13352 struct bfd_link_info *info)
13353 {
13354 struct ppc_link_hash_table *htab;
13355 bfd *dynobj;
13356 asection *sdyn;
13357
13358 htab = ppc_hash_table (info);
13359 if (htab == NULL)
13360 return FALSE;
13361
13362 dynobj = htab->elf.dynobj;
13363 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13364
13365 if (htab->elf.dynamic_sections_created)
13366 {
13367 Elf64_External_Dyn *dyncon, *dynconend;
13368
13369 if (sdyn == NULL || htab->got == NULL)
13370 abort ();
13371
13372 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13373 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13374 for (; dyncon < dynconend; dyncon++)
13375 {
13376 Elf_Internal_Dyn dyn;
13377 asection *s;
13378
13379 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13380
13381 switch (dyn.d_tag)
13382 {
13383 default:
13384 continue;
13385
13386 case DT_PPC64_GLINK:
13387 s = htab->glink;
13388 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13389 /* We stupidly defined DT_PPC64_GLINK to be the start
13390 of glink rather than the first entry point, which is
13391 what ld.so needs, and now have a bigger stub to
13392 support automatic multiple TOCs. */
13393 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13394 break;
13395
13396 case DT_PPC64_OPD:
13397 s = bfd_get_section_by_name (output_bfd, ".opd");
13398 if (s == NULL)
13399 continue;
13400 dyn.d_un.d_ptr = s->vma;
13401 break;
13402
13403 case DT_PPC64_OPDSZ:
13404 s = bfd_get_section_by_name (output_bfd, ".opd");
13405 if (s == NULL)
13406 continue;
13407 dyn.d_un.d_val = s->size;
13408 break;
13409
13410 case DT_PLTGOT:
13411 s = htab->plt;
13412 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13413 break;
13414
13415 case DT_JMPREL:
13416 s = htab->relplt;
13417 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13418 break;
13419
13420 case DT_PLTRELSZ:
13421 dyn.d_un.d_val = htab->relplt->size;
13422 break;
13423
13424 case DT_RELASZ:
13425 /* Don't count procedure linkage table relocs in the
13426 overall reloc count. */
13427 s = htab->relplt;
13428 if (s == NULL)
13429 continue;
13430 dyn.d_un.d_val -= s->size;
13431 break;
13432
13433 case DT_RELA:
13434 /* We may not be using the standard ELF linker script.
13435 If .rela.plt is the first .rela section, we adjust
13436 DT_RELA to not include it. */
13437 s = htab->relplt;
13438 if (s == NULL)
13439 continue;
13440 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13441 continue;
13442 dyn.d_un.d_ptr += s->size;
13443 break;
13444 }
13445
13446 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13447 }
13448 }
13449
13450 if (htab->got != NULL && htab->got->size != 0)
13451 {
13452 /* Fill in the first entry in the global offset table.
13453 We use it to hold the link-time TOCbase. */
13454 bfd_put_64 (output_bfd,
13455 elf_gp (output_bfd) + TOC_BASE_OFF,
13456 htab->got->contents);
13457
13458 /* Set .got entry size. */
13459 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13460 }
13461
13462 if (htab->plt != NULL && htab->plt->size != 0)
13463 {
13464 /* Set .plt entry size. */
13465 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13466 = PLT_ENTRY_SIZE;
13467 }
13468
13469 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13470 brlt ourselves if emitrelocations. */
13471 if (htab->brlt != NULL
13472 && htab->brlt->reloc_count != 0
13473 && !_bfd_elf_link_output_relocs (output_bfd,
13474 htab->brlt,
13475 &elf_section_data (htab->brlt)->rel_hdr,
13476 elf_section_data (htab->brlt)->relocs,
13477 NULL))
13478 return FALSE;
13479
13480 if (htab->glink != NULL
13481 && htab->glink->reloc_count != 0
13482 && !_bfd_elf_link_output_relocs (output_bfd,
13483 htab->glink,
13484 &elf_section_data (htab->glink)->rel_hdr,
13485 elf_section_data (htab->glink)->relocs,
13486 NULL))
13487 return FALSE;
13488
13489 /* We need to handle writing out multiple GOT sections ourselves,
13490 since we didn't add them to DYNOBJ. We know dynobj is the first
13491 bfd. */
13492 while ((dynobj = dynobj->link_next) != NULL)
13493 {
13494 asection *s;
13495
13496 if (!is_ppc64_elf (dynobj))
13497 continue;
13498
13499 s = ppc64_elf_tdata (dynobj)->got;
13500 if (s != NULL
13501 && s->size != 0
13502 && s->output_section != bfd_abs_section_ptr
13503 && !bfd_set_section_contents (output_bfd, s->output_section,
13504 s->contents, s->output_offset,
13505 s->size))
13506 return FALSE;
13507 s = ppc64_elf_tdata (dynobj)->relgot;
13508 if (s != NULL
13509 && s->size != 0
13510 && s->output_section != bfd_abs_section_ptr
13511 && !bfd_set_section_contents (output_bfd, s->output_section,
13512 s->contents, s->output_offset,
13513 s->size))
13514 return FALSE;
13515 }
13516
13517 return TRUE;
13518 }
13519
13520 #include "elf64-target.h"
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