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2010-06-28 Rafael Espindola <espindola@google.com>
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_process_dot_syms
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115 #define elf_backend_post_process_headers _bfd_elf_set_osabi
116
117 /* The name of the dynamic interpreter. This is put in the .interp
118 section. */
119 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
120
121 /* The size in bytes of an entry in the procedure linkage table. */
122 #define PLT_ENTRY_SIZE 24
123
124 /* The initial size of the plt reserved for the dynamic linker. */
125 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
126
127 /* TOC base pointers offset from start of TOC. */
128 #define TOC_BASE_OFF 0x8000
129
130 /* Offset of tp and dtp pointers from start of TLS block. */
131 #define TP_OFFSET 0x7000
132 #define DTP_OFFSET 0x8000
133
134 /* .plt call stub instructions. The normal stub is like this, but
135 sometimes the .plt entry crosses a 64k boundary and we need to
136 insert an addi to adjust r12. */
137 #define PLT_CALL_STUB_SIZE (7*4)
138 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
139 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
140 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
141 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
142 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
143 /* ld %r11,xxx+16@l(%r12) */
144 #define BCTR 0x4e800420 /* bctr */
145
146
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
148 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
149 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
150 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
151
152 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
153 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
154
155 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
156
157 /* glink call stub instructions. We enter with the index in R0. */
158 #define GLINK_CALL_STUB_SIZE (16*4)
159 /* 0: */
160 /* .quad plt0-1f */
161 /* __glink: */
162 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
163 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
164 /* 1: */
165 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
166 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
167 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
168 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
169 /* ld %11,0(%12) */
170 /* ld %2,8(%12) */
171 /* mtctr %11 */
172 /* ld %11,16(%12) */
173 /* bctr */
174
175 /* Pad with this. */
176 #define NOP 0x60000000
177
178 /* Some other nops. */
179 #define CROR_151515 0x4def7b82
180 #define CROR_313131 0x4ffffb82
181
182 /* .glink entries for the first 32k functions are two instructions. */
183 #define LI_R0_0 0x38000000 /* li %r0,0 */
184 #define B_DOT 0x48000000 /* b . */
185
186 /* After that, we need two instructions to load the index, followed by
187 a branch. */
188 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
189 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
190
191 /* Instructions used by the save and restore reg functions. */
192 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
193 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
194 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
195 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
196 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
197 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
198 #define LI_R12_0 0x39800000 /* li %r12,0 */
199 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
200 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
201 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
202 #define BLR 0x4e800020 /* blr */
203
204 /* Since .opd is an array of descriptors and each entry will end up
205 with identical R_PPC64_RELATIVE relocs, there is really no need to
206 propagate .opd relocs; The dynamic linker should be taught to
207 relocate .opd without reloc entries. */
208 #ifndef NO_OPD_RELOCS
209 #define NO_OPD_RELOCS 0
210 #endif
211 \f
212 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
213
214 /* Relocation HOWTO's. */
215 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
216
217 static reloc_howto_type ppc64_elf_howto_raw[] = {
218 /* This reloc does nothing. */
219 HOWTO (R_PPC64_NONE, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_NONE", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 32 bit relocation. */
234 HOWTO (R_PPC64_ADDR32, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 32, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC64_ADDR32", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffffffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* An absolute 26 bit branch; the lower two bits must be zero.
249 FIXME: we don't check that, we just clear them. */
250 HOWTO (R_PPC64_ADDR24, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 26, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR24", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0x03fffffc, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A standard 16 bit relocation. */
265 HOWTO (R_PPC64_ADDR16, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_bitfield, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* A 16 bit relocation without overflow. */
280 HOWTO (R_PPC64_ADDR16_LO, /* type */
281 0, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont,/* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_LO", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address. */
295 HOWTO (R_PPC64_ADDR16_HI, /* type */
296 16, /* rightshift */
297 1, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_dont, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR16_HI", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xffff, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
310 bits, treated as a signed number, is negative. */
311 HOWTO (R_PPC64_ADDR16_HA, /* type */
312 16, /* rightshift */
313 1, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_dont, /* complain_on_overflow */
318 ppc64_elf_ha_reloc, /* special_function */
319 "R_PPC64_ADDR16_HA", /* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0xffff, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch; the lower two bits must be zero.
326 FIXME: we don't check that, we just clear them. */
327 HOWTO (R_PPC64_ADDR14, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 16, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield, /* complain_on_overflow */
334 ppc64_elf_branch_reloc, /* special_function */
335 "R_PPC64_ADDR14", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0x0000fffc, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* An absolute 16 bit branch, for which bit 10 should be set to
342 indicate that the branch is expected to be taken. The lower two
343 bits must be zero. */
344 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 ppc64_elf_brtaken_reloc, /* special_function */
352 "R_PPC64_ADDR14_BRTAKEN",/* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x0000fffc, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 /* An absolute 16 bit branch, for which bit 10 should be set to
359 indicate that the branch is not expected to be taken. The lower
360 two bits must be zero. */
361 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 ppc64_elf_brtaken_reloc, /* special_function */
369 "R_PPC64_ADDR14_BRNTAKEN",/* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* A relative 26 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL24, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 26, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL24", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x03fffffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch; the lower two bits must be zero. */
391 HOWTO (R_PPC64_REL14, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 16, /* bitsize */
395 TRUE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_signed, /* complain_on_overflow */
398 ppc64_elf_branch_reloc, /* special_function */
399 "R_PPC64_REL14", /* name */
400 FALSE, /* partial_inplace */
401 0, /* src_mask */
402 0x0000fffc, /* dst_mask */
403 TRUE), /* pcrel_offset */
404
405 /* A relative 16 bit branch. Bit 10 should be set to indicate that
406 the branch is expected to be taken. The lower two bits must be
407 zero. */
408 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_brtaken_reloc, /* special_function */
416 "R_PPC64_REL14_BRTAKEN", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0x0000fffc, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 /* A relative 16 bit branch. Bit 10 should be set to indicate that
423 the branch is not expected to be taken. The lower two bits must
424 be zero. */
425 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
426 0, /* rightshift */
427 2, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 TRUE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_signed, /* complain_on_overflow */
432 ppc64_elf_brtaken_reloc, /* special_function */
433 "R_PPC64_REL14_BRNTAKEN",/* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0x0000fffc, /* dst_mask */
437 TRUE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
440 symbol. */
441 HOWTO (R_PPC64_GOT16, /* type */
442 0, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_LO, /* type */
458 0, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_LO", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
472 the symbol. */
473 HOWTO (R_PPC64_GOT16_HI, /* type */
474 16, /* rightshift */
475 1, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_dont,/* complain_on_overflow */
480 ppc64_elf_unhandled_reloc, /* special_function */
481 "R_PPC64_GOT16_HI", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
488 the symbol. */
489 HOWTO (R_PPC64_GOT16_HA, /* type */
490 16, /* rightshift */
491 1, /* size (0 = byte, 1 = short, 2 = long) */
492 16, /* bitsize */
493 FALSE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_dont,/* complain_on_overflow */
496 ppc64_elf_unhandled_reloc, /* special_function */
497 "R_PPC64_GOT16_HA", /* name */
498 FALSE, /* partial_inplace */
499 0, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE), /* pcrel_offset */
502
503 /* This is used only by the dynamic linker. The symbol should exist
504 both in the object being run and in some shared library. The
505 dynamic linker copies the data addressed by the symbol from the
506 shared library into the object, because the object being
507 run has to have the data at some particular address. */
508 HOWTO (R_PPC64_COPY, /* type */
509 0, /* rightshift */
510 0, /* this one is variable size */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_COPY", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Like R_PPC64_ADDR64, but used when setting global offset table
523 entries. */
524 HOWTO (R_PPC64_GLOB_DAT, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc64_elf_unhandled_reloc, /* special_function */
532 "R_PPC64_GLOB_DAT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Created by the link editor. Marks a procedure linkage table
539 entry for a symbol. */
540 HOWTO (R_PPC64_JMP_SLOT, /* type */
541 0, /* rightshift */
542 0, /* size (0 = byte, 1 = short, 2 = long) */
543 0, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 ppc64_elf_unhandled_reloc, /* special_function */
548 "R_PPC64_JMP_SLOT", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Used only by the dynamic linker. When the object is run, this
555 doubleword64 is set to the load address of the object, plus the
556 addend. */
557 HOWTO (R_PPC64_RELATIVE, /* type */
558 0, /* rightshift */
559 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
560 64, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_RELATIVE", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 ONES (64), /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC64_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC64_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC64_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative. */
602 HOWTO (R_PPC64_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 /* FIXME: Verify. Was complain_overflow_bitfield. */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC64_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table. */
618 HOWTO (R_PPC64_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: R_PPC64_PLTREL32 not supported. */
634 HOWTO (R_PPC64_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC64_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffffffff, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC64_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc64_elf_unhandled_reloc, /* special_function */
674 "R_PPC64_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC64_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_unhandled_reloc, /* special_function */
690 "R_PPC64_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* Like R_PPC64_SECTOFF, but no overflow warning. */
712 HOWTO (R_PPC64_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC64_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 ppc64_elf_sectoff_ha_reloc, /* special_function */
750 "R_PPC64_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Like R_PPC64_REL24 without touching the two least significant bits. */
757 HOWTO (R_PPC64_REL30, /* type */
758 2, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 30, /* bitsize */
761 TRUE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_REL30", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xfffffffc, /* dst_mask */
769 TRUE), /* pcrel_offset */
770
771 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
772
773 /* A standard 64-bit relocation. */
774 HOWTO (R_PPC64_ADDR64, /* type */
775 0, /* rightshift */
776 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
777 64, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR64", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 ONES (64), /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address. */
789 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
790 32, /* rightshift */
791 1, /* size (0 = byte, 1 = short, 2 = long) */
792 16, /* bitsize */
793 FALSE, /* pc_relative */
794 0, /* bitpos */
795 complain_overflow_dont, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 "R_PPC64_ADDR16_HIGHER", /* name */
798 FALSE, /* partial_inplace */
799 0, /* src_mask */
800 0xffff, /* dst_mask */
801 FALSE), /* pcrel_offset */
802
803 /* The bits 32-47 of an address, plus 1 if the contents of the low
804 16 bits, treated as a signed number, is negative. */
805 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
806 32, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 ppc64_elf_ha_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHERA", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address. */
820 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
821 48, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_PPC64_ADDR16_HIGHEST", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* The bits 48-63 of an address, plus 1 if the contents of the low
835 16 bits, treated as a signed number, is negative. */
836 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
837 48, /* rightshift */
838 1, /* size (0 = byte, 1 = short, 2 = long) */
839 16, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 ppc64_elf_ha_reloc, /* special_function */
844 "R_PPC64_ADDR16_HIGHESTA", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0xffff, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Like ADDR64, but may be unaligned. */
851 HOWTO (R_PPC64_UADDR64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_UADDR64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit relative relocation. */
866 HOWTO (R_PPC64_REL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_PPC64_REL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 64-bit relocation to the symbol's procedure linkage table. */
881 HOWTO (R_PPC64_PLT64, /* type */
882 0, /* rightshift */
883 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
884 64, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_dont, /* complain_on_overflow */
888 ppc64_elf_unhandled_reloc, /* special_function */
889 "R_PPC64_PLT64", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 ONES (64), /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* 64-bit PC relative relocation to the symbol's procedure linkage
896 table. */
897 /* FIXME: R_PPC64_PLTREL64 not supported. */
898 HOWTO (R_PPC64_PLTREL64, /* type */
899 0, /* rightshift */
900 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
901 64, /* bitsize */
902 TRUE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc64_elf_unhandled_reloc, /* special_function */
906 "R_PPC64_PLTREL64", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 ONES (64), /* dst_mask */
910 TRUE), /* pcrel_offset */
911
912 /* 16 bit TOC-relative relocation. */
913
914 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
915 HOWTO (R_PPC64_TOC16, /* type */
916 0, /* rightshift */
917 1, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_signed, /* complain_on_overflow */
922 ppc64_elf_toc_reloc, /* special_function */
923 "R_PPC64_TOC16", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 0xffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
928
929 /* 16 bit TOC-relative relocation without overflow. */
930
931 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
932 HOWTO (R_PPC64_TOC16_LO, /* type */
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc64_elf_toc_reloc, /* special_function */
940 "R_PPC64_TOC16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* 16 bit TOC-relative relocation, high 16 bits. */
947
948 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
949 HOWTO (R_PPC64_TOC16_HI, /* type */
950 16, /* rightshift */
951 1, /* size (0 = byte, 1 = short, 2 = long) */
952 16, /* bitsize */
953 FALSE, /* pc_relative */
954 0, /* bitpos */
955 complain_overflow_dont, /* complain_on_overflow */
956 ppc64_elf_toc_reloc, /* special_function */
957 "R_PPC64_TOC16_HI", /* name */
958 FALSE, /* partial_inplace */
959 0, /* src_mask */
960 0xffff, /* dst_mask */
961 FALSE), /* pcrel_offset */
962
963 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
964 contents of the low 16 bits, treated as a signed number, is
965 negative. */
966
967 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
968 HOWTO (R_PPC64_TOC16_HA, /* type */
969 16, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc64_elf_toc_ha_reloc, /* special_function */
976 "R_PPC64_TOC16_HA", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 64-bit relocation; insert value of TOC base (.TOC.). */
983
984 /* R_PPC64_TOC 51 doubleword64 .TOC. */
985 HOWTO (R_PPC64_TOC, /* type */
986 0, /* rightshift */
987 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
988 64, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_bitfield, /* complain_on_overflow */
992 ppc64_elf_toc64_reloc, /* special_function */
993 "R_PPC64_TOC", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 ONES (64), /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like R_PPC64_GOT16, but also informs the link editor that the
1000 value to relocate may (!) refer to a PLT entry which the link
1001 editor (a) may replace with the symbol value. If the link editor
1002 is unable to fully resolve the symbol, it may (b) create a PLT
1003 entry and store the address to the new PLT entry in the GOT.
1004 This permits lazy resolution of function symbols at run time.
1005 The link editor may also skip all of this and just (c) emit a
1006 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1007 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16, /* type */
1009 0, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_signed, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLTGOT16, but without overflow. */
1023 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1024 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1025 0, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_unhandled_reloc, /* special_function */
1032 "R_PPC64_PLTGOT16_LO", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1039 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1040 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1041 16, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont, /* complain_on_overflow */
1047 ppc64_elf_unhandled_reloc, /* special_function */
1048 "R_PPC64_PLTGOT16_HI", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xffff, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1055 1 if the contents of the low 16 bits, treated as a signed number,
1056 is negative. */
1057 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1058 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1059 16, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 ppc64_elf_unhandled_reloc, /* special_function */
1066 "R_PPC64_PLTGOT16_HA", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_bitfield, /* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont,/* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 "R_PPC64_ADDR16_LO_DS",/* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_GOT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_unhandled_reloc, /* special_function */
1141 "R_PPC64_PLT16_LO_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_bitfield, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_sectoff_reloc, /* special_function */
1171 "R_PPC64_SECTOFF_LO_DS",/* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_signed, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1193 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_toc_reloc, /* special_function */
1201 "R_PPC64_TOC16_LO_DS", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1208 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1209 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1210 0, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_signed, /* complain_on_overflow */
1216 ppc64_elf_unhandled_reloc, /* special_function */
1217 "R_PPC64_PLTGOT16_DS", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xfffc, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1224 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1225 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1226 0, /* rightshift */
1227 1, /* size (0 = byte, 1 = short, 2 = long) */
1228 16, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 ppc64_elf_unhandled_reloc, /* special_function */
1233 "R_PPC64_PLTGOT16_LO_DS",/* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0xfffc, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Marker relocs for TLS. */
1240 HOWTO (R_PPC64_TLS,
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_PPC64_TLS", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 0, /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 HOWTO (R_PPC64_TLSGD,
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_PPC64_TLSGD", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 0, /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 HOWTO (R_PPC64_TLSLD,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLSLD", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* Computes the load module index of the load module that contains the
1283 definition of its TLS sym. */
1284 HOWTO (R_PPC64_DTPMOD64,
1285 0, /* rightshift */
1286 4, /* size (0 = byte, 1 = short, 2 = long) */
1287 64, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_dont, /* complain_on_overflow */
1291 ppc64_elf_unhandled_reloc, /* special_function */
1292 "R_PPC64_DTPMOD64", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 ONES (64), /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* Computes a dtv-relative displacement, the difference between the value
1299 of sym+add and the base address of the thread-local storage block that
1300 contains the definition of sym, minus 0x8000. */
1301 HOWTO (R_PPC64_DTPREL64,
1302 0, /* rightshift */
1303 4, /* size (0 = byte, 1 = short, 2 = long) */
1304 64, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL64", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 ONES (64), /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* A 16 bit dtprel reloc. */
1316 HOWTO (R_PPC64_DTPREL16,
1317 0, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16, but no overflow. */
1331 HOWTO (R_PPC64_DTPREL16_LO,
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_LO", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HI,
1347 16, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HI", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HA,
1362 16, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHER,
1377 32, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHER", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1392 32, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHERA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1406 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1407 48, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_HIGHEST", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xffff, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1421 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1422 48, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like DTPREL16, but for insns with a DS field. */
1436 HOWTO (R_PPC64_DTPREL16_DS,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_DTPREL16_DS", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xfffc, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like DTPREL16_DS, but no overflow. */
1451 HOWTO (R_PPC64_DTPREL16_LO_DS,
1452 0, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_DTPREL16_LO_DS", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xfffc, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Computes a tp-relative displacement, the difference between the value of
1466 sym+add and the value of the thread pointer (r13). */
1467 HOWTO (R_PPC64_TPREL64,
1468 0, /* rightshift */
1469 4, /* size (0 = byte, 1 = short, 2 = long) */
1470 64, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL64", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 ONES (64), /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* A 16 bit tprel reloc. */
1482 HOWTO (R_PPC64_TPREL16,
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16, but no overflow. */
1497 HOWTO (R_PPC64_TPREL16_LO,
1498 0, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_LO", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_LO, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HI,
1513 16, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HI", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HI, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HA,
1528 16, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HI, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHER,
1543 32, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHER", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHERA,
1558 32, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHERA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1572 HOWTO (R_PPC64_TPREL16_HIGHEST,
1573 48, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_dont, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_HIGHEST", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xffff, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1587 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1588 48, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_HIGHESTA", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xffff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Like TPREL16, but for insns with a DS field. */
1602 HOWTO (R_PPC64_TPREL16_DS,
1603 0, /* rightshift */
1604 1, /* size (0 = byte, 1 = short, 2 = long) */
1605 16, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_signed, /* complain_on_overflow */
1609 ppc64_elf_unhandled_reloc, /* special_function */
1610 "R_PPC64_TPREL16_DS", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0xfffc, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Like TPREL16_DS, but no overflow. */
1617 HOWTO (R_PPC64_TPREL16_LO_DS,
1618 0, /* rightshift */
1619 1, /* size (0 = byte, 1 = short, 2 = long) */
1620 16, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_dont, /* complain_on_overflow */
1624 ppc64_elf_unhandled_reloc, /* special_function */
1625 "R_PPC64_TPREL16_LO_DS", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0xfffc, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1632 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1633 to the first entry relative to the TOC base (r2). */
1634 HOWTO (R_PPC64_GOT_TLSGD16,
1635 0, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_signed, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16, but no overflow. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1650 0, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_LO", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1664 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1665 16, /* rightshift */
1666 1, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc64_elf_unhandled_reloc, /* special_function */
1672 "R_PPC64_GOT_TLSGD16_HI", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0xffff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1679 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1680 16, /* rightshift */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc64_elf_unhandled_reloc, /* special_function */
1687 "R_PPC64_GOT_TLSGD16_HA", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0xffff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1694 with values (sym+add)@dtpmod and zero, and computes the offset to the
1695 first entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_TLSLD16,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16, but no overflow. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_LO", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_TLSLD16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_TLSLD16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1756 the offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_DTPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_DTPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1817 offset to the entry relative to the TOC base (r2). */
1818 HOWTO (R_PPC64_GOT_TPREL16_DS,
1819 0, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_signed, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_DS", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xfffc, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_DS, but no overflow. */
1833 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1834 0, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xfffc, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1848 HOWTO (R_PPC64_GOT_TPREL16_HI,
1849 16, /* rightshift */
1850 1, /* size (0 = byte, 1 = short, 2 = long) */
1851 16, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 ppc64_elf_unhandled_reloc, /* special_function */
1856 "R_PPC64_GOT_TPREL16_HI", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0xffff, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1863 HOWTO (R_PPC64_GOT_TPREL16_HA,
1864 16, /* rightshift */
1865 1, /* size (0 = byte, 1 = short, 2 = long) */
1866 16, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 ppc64_elf_unhandled_reloc, /* special_function */
1871 "R_PPC64_GOT_TPREL16_HA", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0xffff, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876
1877 HOWTO (R_PPC64_JMP_IREL, /* type */
1878 0, /* rightshift */
1879 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1880 0, /* bitsize */
1881 FALSE, /* pc_relative */
1882 0, /* bitpos */
1883 complain_overflow_dont, /* complain_on_overflow */
1884 ppc64_elf_unhandled_reloc, /* special_function */
1885 "R_PPC64_JMP_IREL", /* name */
1886 FALSE, /* partial_inplace */
1887 0, /* src_mask */
1888 0, /* dst_mask */
1889 FALSE), /* pcrel_offset */
1890
1891 HOWTO (R_PPC64_IRELATIVE, /* type */
1892 0, /* rightshift */
1893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1894 64, /* bitsize */
1895 FALSE, /* pc_relative */
1896 0, /* bitpos */
1897 complain_overflow_dont, /* complain_on_overflow */
1898 bfd_elf_generic_reloc, /* special_function */
1899 "R_PPC64_IRELATIVE", /* name */
1900 FALSE, /* partial_inplace */
1901 0, /* src_mask */
1902 ONES (64), /* dst_mask */
1903 FALSE), /* pcrel_offset */
1904
1905 /* A 16 bit relative relocation. */
1906 HOWTO (R_PPC64_REL16, /* type */
1907 0, /* rightshift */
1908 1, /* size (0 = byte, 1 = short, 2 = long) */
1909 16, /* bitsize */
1910 TRUE, /* pc_relative */
1911 0, /* bitpos */
1912 complain_overflow_bitfield, /* complain_on_overflow */
1913 bfd_elf_generic_reloc, /* special_function */
1914 "R_PPC64_REL16", /* name */
1915 FALSE, /* partial_inplace */
1916 0, /* src_mask */
1917 0xffff, /* dst_mask */
1918 TRUE), /* pcrel_offset */
1919
1920 /* A 16 bit relative relocation without overflow. */
1921 HOWTO (R_PPC64_REL16_LO, /* type */
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 TRUE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_dont,/* complain_on_overflow */
1928 bfd_elf_generic_reloc, /* special_function */
1929 "R_PPC64_REL16_LO", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xffff, /* dst_mask */
1933 TRUE), /* pcrel_offset */
1934
1935 /* The high order 16 bits of a relative address. */
1936 HOWTO (R_PPC64_REL16_HI, /* type */
1937 16, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 TRUE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 bfd_elf_generic_reloc, /* special_function */
1944 "R_PPC64_REL16_HI", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xffff, /* dst_mask */
1948 TRUE), /* pcrel_offset */
1949
1950 /* The high order 16 bits of a relative address, plus 1 if the contents of
1951 the low 16 bits, treated as a signed number, is negative. */
1952 HOWTO (R_PPC64_REL16_HA, /* type */
1953 16, /* rightshift */
1954 1, /* size (0 = byte, 1 = short, 2 = long) */
1955 16, /* bitsize */
1956 TRUE, /* pc_relative */
1957 0, /* bitpos */
1958 complain_overflow_dont, /* complain_on_overflow */
1959 ppc64_elf_ha_reloc, /* special_function */
1960 "R_PPC64_REL16_HA", /* name */
1961 FALSE, /* partial_inplace */
1962 0, /* src_mask */
1963 0xffff, /* dst_mask */
1964 TRUE), /* pcrel_offset */
1965
1966 /* GNU extension to record C++ vtable hierarchy. */
1967 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1968 0, /* rightshift */
1969 0, /* size (0 = byte, 1 = short, 2 = long) */
1970 0, /* bitsize */
1971 FALSE, /* pc_relative */
1972 0, /* bitpos */
1973 complain_overflow_dont, /* complain_on_overflow */
1974 NULL, /* special_function */
1975 "R_PPC64_GNU_VTINHERIT", /* name */
1976 FALSE, /* partial_inplace */
1977 0, /* src_mask */
1978 0, /* dst_mask */
1979 FALSE), /* pcrel_offset */
1980
1981 /* GNU extension to record C++ vtable member usage. */
1982 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1983 0, /* rightshift */
1984 0, /* size (0 = byte, 1 = short, 2 = long) */
1985 0, /* bitsize */
1986 FALSE, /* pc_relative */
1987 0, /* bitpos */
1988 complain_overflow_dont, /* complain_on_overflow */
1989 NULL, /* special_function */
1990 "R_PPC64_GNU_VTENTRY", /* name */
1991 FALSE, /* partial_inplace */
1992 0, /* src_mask */
1993 0, /* dst_mask */
1994 FALSE), /* pcrel_offset */
1995 };
1996
1997 \f
1998 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1999 be done. */
2000
2001 static void
2002 ppc_howto_init (void)
2003 {
2004 unsigned int i, type;
2005
2006 for (i = 0;
2007 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2008 i++)
2009 {
2010 type = ppc64_elf_howto_raw[i].type;
2011 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2012 / sizeof (ppc64_elf_howto_table[0])));
2013 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2014 }
2015 }
2016
2017 static reloc_howto_type *
2018 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2019 bfd_reloc_code_real_type code)
2020 {
2021 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2022
2023 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2024 /* Initialize howto table if needed. */
2025 ppc_howto_init ();
2026
2027 switch (code)
2028 {
2029 default:
2030 return NULL;
2031
2032 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2033 break;
2034 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2035 break;
2036 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2037 break;
2038 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2039 break;
2040 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2041 break;
2042 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2043 break;
2044 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2045 break;
2046 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2047 break;
2048 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2053 break;
2054 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2055 break;
2056 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2059 break;
2060 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2061 break;
2062 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2063 break;
2064 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2065 break;
2066 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2067 break;
2068 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2069 break;
2070 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2071 break;
2072 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2073 break;
2074 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2075 break;
2076 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2077 break;
2078 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2079 break;
2080 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2081 break;
2082 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2083 break;
2084 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2085 break;
2086 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2087 break;
2088 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2089 break;
2090 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2091 break;
2092 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2093 break;
2094 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2103 break;
2104 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2105 break;
2106 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2107 break;
2108 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2109 break;
2110 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2111 break;
2112 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2117 break;
2118 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2119 break;
2120 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2127 break;
2128 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2131 break;
2132 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2135 break;
2136 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2141 break;
2142 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2145 break;
2146 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2149 break;
2150 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2151 break;
2152 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2153 break;
2154 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2155 break;
2156 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2157 break;
2158 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2165 break;
2166 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2167 break;
2168 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2177 break;
2178 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2201 break;
2202 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2209 break;
2210 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2221 break;
2222 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2233 break;
2234 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2235 break;
2236 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2237 break;
2238 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2239 break;
2240 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2241 break;
2242 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2243 break;
2244 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2245 break;
2246 }
2247
2248 return ppc64_elf_howto_table[r];
2249 };
2250
2251 static reloc_howto_type *
2252 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2253 const char *r_name)
2254 {
2255 unsigned int i;
2256
2257 for (i = 0;
2258 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2259 i++)
2260 if (ppc64_elf_howto_raw[i].name != NULL
2261 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2262 return &ppc64_elf_howto_raw[i];
2263
2264 return NULL;
2265 }
2266
2267 /* Set the howto pointer for a PowerPC ELF reloc. */
2268
2269 static void
2270 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2271 Elf_Internal_Rela *dst)
2272 {
2273 unsigned int type;
2274
2275 /* Initialize howto table if needed. */
2276 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2277 ppc_howto_init ();
2278
2279 type = ELF64_R_TYPE (dst->r_info);
2280 if (type >= (sizeof (ppc64_elf_howto_table)
2281 / sizeof (ppc64_elf_howto_table[0])))
2282 {
2283 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2284 abfd, (int) type);
2285 type = R_PPC64_NONE;
2286 }
2287 cache_ptr->howto = ppc64_elf_howto_table[type];
2288 }
2289
2290 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 /* If this is a relocatable link (output_bfd test tells us), just
2298 call the generic function. Any adjustment will be done at final
2299 link time. */
2300 if (output_bfd != NULL)
2301 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2302 input_section, output_bfd, error_message);
2303
2304 /* Adjust the addend for sign extension of the low 16 bits.
2305 We won't actually be using the low 16 bits, so trashing them
2306 doesn't matter. */
2307 reloc_entry->addend += 0x8000;
2308 return bfd_reloc_continue;
2309 }
2310
2311 static bfd_reloc_status_type
2312 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2313 void *data, asection *input_section,
2314 bfd *output_bfd, char **error_message)
2315 {
2316 if (output_bfd != NULL)
2317 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2318 input_section, output_bfd, error_message);
2319
2320 if (strcmp (symbol->section->name, ".opd") == 0
2321 && (symbol->section->owner->flags & DYNAMIC) == 0)
2322 {
2323 bfd_vma dest = opd_entry_value (symbol->section,
2324 symbol->value + reloc_entry->addend,
2325 NULL, NULL);
2326 if (dest != (bfd_vma) -1)
2327 reloc_entry->addend = dest - (symbol->value
2328 + symbol->section->output_section->vma
2329 + symbol->section->output_offset);
2330 }
2331 return bfd_reloc_continue;
2332 }
2333
2334 static bfd_reloc_status_type
2335 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2336 void *data, asection *input_section,
2337 bfd *output_bfd, char **error_message)
2338 {
2339 long insn;
2340 enum elf_ppc64_reloc_type r_type;
2341 bfd_size_type octets;
2342 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2343 bfd_boolean is_power4 = FALSE;
2344
2345 /* If this is a relocatable link (output_bfd test tells us), just
2346 call the generic function. Any adjustment will be done at final
2347 link time. */
2348 if (output_bfd != NULL)
2349 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2350 input_section, output_bfd, error_message);
2351
2352 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2353 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2354 insn &= ~(0x01 << 21);
2355 r_type = reloc_entry->howto->type;
2356 if (r_type == R_PPC64_ADDR14_BRTAKEN
2357 || r_type == R_PPC64_REL14_BRTAKEN)
2358 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2359
2360 if (is_power4)
2361 {
2362 /* Set 'a' bit. This is 0b00010 in BO field for branch
2363 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2364 for branch on CTR insns (BO == 1a00t or 1a01t). */
2365 if ((insn & (0x14 << 21)) == (0x04 << 21))
2366 insn |= 0x02 << 21;
2367 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2368 insn |= 0x08 << 21;
2369 else
2370 goto out;
2371 }
2372 else
2373 {
2374 bfd_vma target = 0;
2375 bfd_vma from;
2376
2377 if (!bfd_is_com_section (symbol->section))
2378 target = symbol->value;
2379 target += symbol->section->output_section->vma;
2380 target += symbol->section->output_offset;
2381 target += reloc_entry->addend;
2382
2383 from = (reloc_entry->address
2384 + input_section->output_offset
2385 + input_section->output_section->vma);
2386
2387 /* Invert 'y' bit if not the default. */
2388 if ((bfd_signed_vma) (target - from) < 0)
2389 insn ^= 0x01 << 21;
2390 }
2391 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2392 out:
2393 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2394 input_section, output_bfd, error_message);
2395 }
2396
2397 static bfd_reloc_status_type
2398 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2399 void *data, asection *input_section,
2400 bfd *output_bfd, char **error_message)
2401 {
2402 /* If this is a relocatable link (output_bfd test tells us), just
2403 call the generic function. Any adjustment will be done at final
2404 link time. */
2405 if (output_bfd != NULL)
2406 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2407 input_section, output_bfd, error_message);
2408
2409 /* Subtract the symbol section base address. */
2410 reloc_entry->addend -= symbol->section->output_section->vma;
2411 return bfd_reloc_continue;
2412 }
2413
2414 static bfd_reloc_status_type
2415 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2416 void *data, asection *input_section,
2417 bfd *output_bfd, char **error_message)
2418 {
2419 /* If this is a relocatable link (output_bfd test tells us), just
2420 call the generic function. Any adjustment will be done at final
2421 link time. */
2422 if (output_bfd != NULL)
2423 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2424 input_section, output_bfd, error_message);
2425
2426 /* Subtract the symbol section base address. */
2427 reloc_entry->addend -= symbol->section->output_section->vma;
2428
2429 /* Adjust the addend for sign extension of the low 16 bits. */
2430 reloc_entry->addend += 0x8000;
2431 return bfd_reloc_continue;
2432 }
2433
2434 static bfd_reloc_status_type
2435 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2436 void *data, asection *input_section,
2437 bfd *output_bfd, char **error_message)
2438 {
2439 bfd_vma TOCstart;
2440
2441 /* If this is a relocatable link (output_bfd test tells us), just
2442 call the generic function. Any adjustment will be done at final
2443 link time. */
2444 if (output_bfd != NULL)
2445 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2446 input_section, output_bfd, error_message);
2447
2448 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2449 if (TOCstart == 0)
2450 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2451
2452 /* Subtract the TOC base address. */
2453 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2454 return bfd_reloc_continue;
2455 }
2456
2457 static bfd_reloc_status_type
2458 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2459 void *data, asection *input_section,
2460 bfd *output_bfd, char **error_message)
2461 {
2462 bfd_vma TOCstart;
2463
2464 /* If this is a relocatable link (output_bfd test tells us), just
2465 call the generic function. Any adjustment will be done at final
2466 link time. */
2467 if (output_bfd != NULL)
2468 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2469 input_section, output_bfd, error_message);
2470
2471 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2472 if (TOCstart == 0)
2473 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2474
2475 /* Subtract the TOC base address. */
2476 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2477
2478 /* Adjust the addend for sign extension of the low 16 bits. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 bfd_vma TOCstart;
2489 bfd_size_type octets;
2490
2491 /* If this is a relocatable link (output_bfd test tells us), just
2492 call the generic function. Any adjustment will be done at final
2493 link time. */
2494 if (output_bfd != NULL)
2495 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2496 input_section, output_bfd, error_message);
2497
2498 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2499 if (TOCstart == 0)
2500 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2501
2502 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2503 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2504 return bfd_reloc_ok;
2505 }
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 if (error_message != NULL)
2520 {
2521 static char buf[60];
2522 sprintf (buf, "generic linker can't handle %s",
2523 reloc_entry->howto->name);
2524 *error_message = buf;
2525 }
2526 return bfd_reloc_dangerous;
2527 }
2528
2529 /* Track GOT entries needed for a given symbol. We might need more
2530 than one got entry per symbol. */
2531 struct got_entry
2532 {
2533 struct got_entry *next;
2534
2535 /* The symbol addend that we'll be placing in the GOT. */
2536 bfd_vma addend;
2537
2538 /* Unlike other ELF targets, we use separate GOT entries for the same
2539 symbol referenced from different input files. This is to support
2540 automatic multiple TOC/GOT sections, where the TOC base can vary
2541 from one input file to another. After partitioning into TOC groups
2542 we merge entries within the group.
2543
2544 Point to the BFD owning this GOT entry. */
2545 bfd *owner;
2546
2547 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2548 TLS_TPREL or TLS_DTPREL for tls entries. */
2549 unsigned char tls_type;
2550
2551 /* Non-zero if got.ent points to real entry. */
2552 unsigned char is_indirect;
2553
2554 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2555 union
2556 {
2557 bfd_signed_vma refcount;
2558 bfd_vma offset;
2559 struct got_entry *ent;
2560 } got;
2561 };
2562
2563 /* The same for PLT. */
2564 struct plt_entry
2565 {
2566 struct plt_entry *next;
2567
2568 bfd_vma addend;
2569
2570 union
2571 {
2572 bfd_signed_vma refcount;
2573 bfd_vma offset;
2574 } plt;
2575 };
2576
2577 struct ppc64_elf_obj_tdata
2578 {
2579 struct elf_obj_tdata elf;
2580
2581 /* Shortcuts to dynamic linker sections. */
2582 asection *got;
2583 asection *relgot;
2584
2585 /* Used during garbage collection. We attach global symbols defined
2586 on removed .opd entries to this section so that the sym is removed. */
2587 asection *deleted_section;
2588
2589 /* TLS local dynamic got entry handling. Support for multiple GOT
2590 sections means we potentially need one of these for each input bfd. */
2591 struct got_entry tlsld_got;
2592
2593 /* A copy of relocs before they are modified for --emit-relocs. */
2594 Elf_Internal_Rela *opd_relocs;
2595
2596 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2597 the reloc to be in the range -32768 to 32767. */
2598 unsigned int has_small_toc_reloc;
2599 };
2600
2601 #define ppc64_elf_tdata(bfd) \
2602 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2603
2604 #define ppc64_tlsld_got(bfd) \
2605 (&ppc64_elf_tdata (bfd)->tlsld_got)
2606
2607 #define is_ppc64_elf(bfd) \
2608 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2609 && elf_object_id (bfd) == PPC64_ELF_DATA)
2610
2611 /* Override the generic function because we store some extras. */
2612
2613 static bfd_boolean
2614 ppc64_elf_mkobject (bfd *abfd)
2615 {
2616 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2617 PPC64_ELF_DATA);
2618 }
2619
2620 /* Fix bad default arch selected for a 64 bit input bfd when the
2621 default is 32 bit. */
2622
2623 static bfd_boolean
2624 ppc64_elf_object_p (bfd *abfd)
2625 {
2626 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2627 {
2628 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2629
2630 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2631 {
2632 /* Relies on arch after 32 bit default being 64 bit default. */
2633 abfd->arch_info = abfd->arch_info->next;
2634 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2635 }
2636 }
2637 return TRUE;
2638 }
2639
2640 /* Support for core dump NOTE sections. */
2641
2642 static bfd_boolean
2643 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2644 {
2645 size_t offset, size;
2646
2647 if (note->descsz != 504)
2648 return FALSE;
2649
2650 /* pr_cursig */
2651 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2652
2653 /* pr_pid */
2654 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2655
2656 /* pr_reg */
2657 offset = 112;
2658 size = 384;
2659
2660 /* Make a ".reg/999" section. */
2661 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2662 size, note->descpos + offset);
2663 }
2664
2665 static bfd_boolean
2666 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2667 {
2668 if (note->descsz != 136)
2669 return FALSE;
2670
2671 elf_tdata (abfd)->core_program
2672 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2673 elf_tdata (abfd)->core_command
2674 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2675
2676 return TRUE;
2677 }
2678
2679 static char *
2680 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2681 ...)
2682 {
2683 switch (note_type)
2684 {
2685 default:
2686 return NULL;
2687
2688 case NT_PRPSINFO:
2689 {
2690 char data[136];
2691 va_list ap;
2692
2693 va_start (ap, note_type);
2694 memset (data, 0, 40);
2695 strncpy (data + 40, va_arg (ap, const char *), 16);
2696 strncpy (data + 56, va_arg (ap, const char *), 80);
2697 va_end (ap);
2698 return elfcore_write_note (abfd, buf, bufsiz,
2699 "CORE", note_type, data, sizeof (data));
2700 }
2701
2702 case NT_PRSTATUS:
2703 {
2704 char data[504];
2705 va_list ap;
2706 long pid;
2707 int cursig;
2708 const void *greg;
2709
2710 va_start (ap, note_type);
2711 memset (data, 0, 112);
2712 pid = va_arg (ap, long);
2713 bfd_put_32 (abfd, pid, data + 32);
2714 cursig = va_arg (ap, int);
2715 bfd_put_16 (abfd, cursig, data + 12);
2716 greg = va_arg (ap, const void *);
2717 memcpy (data + 112, greg, 384);
2718 memset (data + 496, 0, 8);
2719 va_end (ap);
2720 return elfcore_write_note (abfd, buf, bufsiz,
2721 "CORE", note_type, data, sizeof (data));
2722 }
2723 }
2724 }
2725
2726 /* Merge backend specific data from an object file to the output
2727 object file when linking. */
2728
2729 static bfd_boolean
2730 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2731 {
2732 /* Check if we have the same endianess. */
2733 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2734 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2735 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2736 {
2737 const char *msg;
2738
2739 if (bfd_big_endian (ibfd))
2740 msg = _("%B: compiled for a big endian system "
2741 "and target is little endian");
2742 else
2743 msg = _("%B: compiled for a little endian system "
2744 "and target is big endian");
2745
2746 (*_bfd_error_handler) (msg, ibfd);
2747
2748 bfd_set_error (bfd_error_wrong_format);
2749 return FALSE;
2750 }
2751
2752 return TRUE;
2753 }
2754
2755 /* Add extra PPC sections. */
2756
2757 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2758 {
2759 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2760 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2761 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2762 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2765 { NULL, 0, 0, 0, 0 }
2766 };
2767
2768 enum _ppc64_sec_type {
2769 sec_normal = 0,
2770 sec_opd = 1,
2771 sec_toc = 2
2772 };
2773
2774 struct _ppc64_elf_section_data
2775 {
2776 struct bfd_elf_section_data elf;
2777
2778 union
2779 {
2780 /* An array with one entry for each opd function descriptor. */
2781 struct _opd_sec_data
2782 {
2783 /* Points to the function code section for local opd entries. */
2784 asection **func_sec;
2785
2786 /* After editing .opd, adjust references to opd local syms. */
2787 long *adjust;
2788 } opd;
2789
2790 /* An array for toc sections, indexed by offset/8. */
2791 struct _toc_sec_data
2792 {
2793 /* Specifies the relocation symbol index used at a given toc offset. */
2794 unsigned *symndx;
2795
2796 /* And the relocation addend. */
2797 bfd_vma *add;
2798 } toc;
2799 } u;
2800
2801 enum _ppc64_sec_type sec_type:2;
2802
2803 /* Flag set when small branches are detected. Used to
2804 select suitable defaults for the stub group size. */
2805 unsigned int has_14bit_branch:1;
2806 };
2807
2808 #define ppc64_elf_section_data(sec) \
2809 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2810
2811 static bfd_boolean
2812 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2813 {
2814 if (!sec->used_by_bfd)
2815 {
2816 struct _ppc64_elf_section_data *sdata;
2817 bfd_size_type amt = sizeof (*sdata);
2818
2819 sdata = bfd_zalloc (abfd, amt);
2820 if (sdata == NULL)
2821 return FALSE;
2822 sec->used_by_bfd = sdata;
2823 }
2824
2825 return _bfd_elf_new_section_hook (abfd, sec);
2826 }
2827
2828 static struct _opd_sec_data *
2829 get_opd_info (asection * sec)
2830 {
2831 if (sec != NULL
2832 && ppc64_elf_section_data (sec) != NULL
2833 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2834 return &ppc64_elf_section_data (sec)->u.opd;
2835 return NULL;
2836 }
2837 \f
2838 /* Parameters for the qsort hook. */
2839 static bfd_boolean synthetic_relocatable;
2840
2841 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2842
2843 static int
2844 compare_symbols (const void *ap, const void *bp)
2845 {
2846 const asymbol *a = * (const asymbol **) ap;
2847 const asymbol *b = * (const asymbol **) bp;
2848
2849 /* Section symbols first. */
2850 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2851 return -1;
2852 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2853 return 1;
2854
2855 /* then .opd symbols. */
2856 if (strcmp (a->section->name, ".opd") == 0
2857 && strcmp (b->section->name, ".opd") != 0)
2858 return -1;
2859 if (strcmp (a->section->name, ".opd") != 0
2860 && strcmp (b->section->name, ".opd") == 0)
2861 return 1;
2862
2863 /* then other code symbols. */
2864 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2865 == (SEC_CODE | SEC_ALLOC)
2866 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 != (SEC_CODE | SEC_ALLOC))
2868 return -1;
2869
2870 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2871 != (SEC_CODE | SEC_ALLOC)
2872 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 == (SEC_CODE | SEC_ALLOC))
2874 return 1;
2875
2876 if (synthetic_relocatable)
2877 {
2878 if (a->section->id < b->section->id)
2879 return -1;
2880
2881 if (a->section->id > b->section->id)
2882 return 1;
2883 }
2884
2885 if (a->value + a->section->vma < b->value + b->section->vma)
2886 return -1;
2887
2888 if (a->value + a->section->vma > b->value + b->section->vma)
2889 return 1;
2890
2891 /* For syms with the same value, prefer strong dynamic global function
2892 syms over other syms. */
2893 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2894 return -1;
2895
2896 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2897 return 1;
2898
2899 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2900 return -1;
2901
2902 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2903 return 1;
2904
2905 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2906 return -1;
2907
2908 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2909 return 1;
2910
2911 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2912 return -1;
2913
2914 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2915 return 1;
2916
2917 return 0;
2918 }
2919
2920 /* Search SYMS for a symbol of the given VALUE. */
2921
2922 static asymbol *
2923 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2924 {
2925 long mid;
2926
2927 if (id == -1)
2928 {
2929 while (lo < hi)
2930 {
2931 mid = (lo + hi) >> 1;
2932 if (syms[mid]->value + syms[mid]->section->vma < value)
2933 lo = mid + 1;
2934 else if (syms[mid]->value + syms[mid]->section->vma > value)
2935 hi = mid;
2936 else
2937 return syms[mid];
2938 }
2939 }
2940 else
2941 {
2942 while (lo < hi)
2943 {
2944 mid = (lo + hi) >> 1;
2945 if (syms[mid]->section->id < id)
2946 lo = mid + 1;
2947 else if (syms[mid]->section->id > id)
2948 hi = mid;
2949 else if (syms[mid]->value < value)
2950 lo = mid + 1;
2951 else if (syms[mid]->value > value)
2952 hi = mid;
2953 else
2954 return syms[mid];
2955 }
2956 }
2957 return NULL;
2958 }
2959
2960 static bfd_boolean
2961 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2962 {
2963 bfd_vma vma = *(bfd_vma *) ptr;
2964 return ((section->flags & SEC_ALLOC) != 0
2965 && section->vma <= vma
2966 && vma < section->vma + section->size);
2967 }
2968
2969 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2970 entry syms. Also generate @plt symbols for the glink branch table. */
2971
2972 static long
2973 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2974 long static_count, asymbol **static_syms,
2975 long dyn_count, asymbol **dyn_syms,
2976 asymbol **ret)
2977 {
2978 asymbol *s;
2979 long i;
2980 long count;
2981 char *names;
2982 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2983 asection *opd;
2984 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2985 asymbol **syms;
2986
2987 *ret = NULL;
2988
2989 opd = bfd_get_section_by_name (abfd, ".opd");
2990 if (opd == NULL)
2991 return 0;
2992
2993 symcount = static_count;
2994 if (!relocatable)
2995 symcount += dyn_count;
2996 if (symcount == 0)
2997 return 0;
2998
2999 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3000 if (syms == NULL)
3001 return -1;
3002
3003 if (!relocatable && static_count != 0 && dyn_count != 0)
3004 {
3005 /* Use both symbol tables. */
3006 memcpy (syms, static_syms, static_count * sizeof (*syms));
3007 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3008 }
3009 else if (!relocatable && static_count == 0)
3010 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3011 else
3012 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3013
3014 synthetic_relocatable = relocatable;
3015 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3016
3017 if (!relocatable && symcount > 1)
3018 {
3019 long j;
3020 /* Trim duplicate syms, since we may have merged the normal and
3021 dynamic symbols. Actually, we only care about syms that have
3022 different values, so trim any with the same value. */
3023 for (i = 1, j = 1; i < symcount; ++i)
3024 if (syms[i - 1]->value + syms[i - 1]->section->vma
3025 != syms[i]->value + syms[i]->section->vma)
3026 syms[j++] = syms[i];
3027 symcount = j;
3028 }
3029
3030 i = 0;
3031 if (strcmp (syms[i]->section->name, ".opd") == 0)
3032 ++i;
3033 codesecsym = i;
3034
3035 for (; i < symcount; ++i)
3036 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3037 != (SEC_CODE | SEC_ALLOC))
3038 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3039 break;
3040 codesecsymend = i;
3041
3042 for (; i < symcount; ++i)
3043 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3044 break;
3045 secsymend = i;
3046
3047 for (; i < symcount; ++i)
3048 if (strcmp (syms[i]->section->name, ".opd") != 0)
3049 break;
3050 opdsymend = i;
3051
3052 for (; i < symcount; ++i)
3053 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3054 != (SEC_CODE | SEC_ALLOC))
3055 break;
3056 symcount = i;
3057
3058 count = 0;
3059
3060 if (relocatable)
3061 {
3062 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3063 arelent *r;
3064 size_t size;
3065 long relcount;
3066
3067 if (opdsymend == secsymend)
3068 goto done;
3069
3070 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3071 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3072 if (relcount == 0)
3073 goto done;
3074
3075 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3076 {
3077 count = -1;
3078 goto done;
3079 }
3080
3081 size = 0;
3082 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3083 {
3084 asymbol *sym;
3085
3086 while (r < opd->relocation + relcount
3087 && r->address < syms[i]->value + opd->vma)
3088 ++r;
3089
3090 if (r == opd->relocation + relcount)
3091 break;
3092
3093 if (r->address != syms[i]->value + opd->vma)
3094 continue;
3095
3096 if (r->howto->type != R_PPC64_ADDR64)
3097 continue;
3098
3099 sym = *r->sym_ptr_ptr;
3100 if (!sym_exists_at (syms, opdsymend, symcount,
3101 sym->section->id, sym->value + r->addend))
3102 {
3103 ++count;
3104 size += sizeof (asymbol);
3105 size += strlen (syms[i]->name) + 2;
3106 }
3107 }
3108
3109 s = *ret = bfd_malloc (size);
3110 if (s == NULL)
3111 {
3112 count = -1;
3113 goto done;
3114 }
3115
3116 names = (char *) (s + count);
3117
3118 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3119 {
3120 asymbol *sym;
3121
3122 while (r < opd->relocation + relcount
3123 && r->address < syms[i]->value + opd->vma)
3124 ++r;
3125
3126 if (r == opd->relocation + relcount)
3127 break;
3128
3129 if (r->address != syms[i]->value + opd->vma)
3130 continue;
3131
3132 if (r->howto->type != R_PPC64_ADDR64)
3133 continue;
3134
3135 sym = *r->sym_ptr_ptr;
3136 if (!sym_exists_at (syms, opdsymend, symcount,
3137 sym->section->id, sym->value + r->addend))
3138 {
3139 size_t len;
3140
3141 *s = *syms[i];
3142 s->flags |= BSF_SYNTHETIC;
3143 s->section = sym->section;
3144 s->value = sym->value + r->addend;
3145 s->name = names;
3146 *names++ = '.';
3147 len = strlen (syms[i]->name);
3148 memcpy (names, syms[i]->name, len + 1);
3149 names += len + 1;
3150 /* Have udata.p point back to the original symbol this
3151 synthetic symbol was derived from. */
3152 s->udata.p = syms[i];
3153 s++;
3154 }
3155 }
3156 }
3157 else
3158 {
3159 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3160 bfd_byte *contents;
3161 size_t size;
3162 long plt_count = 0;
3163 bfd_vma glink_vma = 0, resolv_vma = 0;
3164 asection *dynamic, *glink = NULL, *relplt = NULL;
3165 arelent *p;
3166
3167 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3168 {
3169 if (contents)
3170 {
3171 free_contents_and_exit:
3172 free (contents);
3173 }
3174 count = -1;
3175 goto done;
3176 }
3177
3178 size = 0;
3179 for (i = secsymend; i < opdsymend; ++i)
3180 {
3181 bfd_vma ent;
3182
3183 /* Ignore bogus symbols. */
3184 if (syms[i]->value > opd->size - 8)
3185 continue;
3186
3187 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3188 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3189 {
3190 ++count;
3191 size += sizeof (asymbol);
3192 size += strlen (syms[i]->name) + 2;
3193 }
3194 }
3195
3196 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3197 if (dyn_count != 0
3198 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3199 {
3200 bfd_byte *dynbuf, *extdyn, *extdynend;
3201 size_t extdynsize;
3202 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3203
3204 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3205 goto free_contents_and_exit;
3206
3207 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3208 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3209
3210 extdyn = dynbuf;
3211 extdynend = extdyn + dynamic->size;
3212 for (; extdyn < extdynend; extdyn += extdynsize)
3213 {
3214 Elf_Internal_Dyn dyn;
3215 (*swap_dyn_in) (abfd, extdyn, &dyn);
3216
3217 if (dyn.d_tag == DT_NULL)
3218 break;
3219
3220 if (dyn.d_tag == DT_PPC64_GLINK)
3221 {
3222 /* The first glink stub starts at offset 32; see comment in
3223 ppc64_elf_finish_dynamic_sections. */
3224 glink_vma = dyn.d_un.d_val + 32;
3225 /* The .glink section usually does not survive the final
3226 link; search for the section (usually .text) where the
3227 glink stubs now reside. */
3228 glink = bfd_sections_find_if (abfd, section_covers_vma,
3229 &glink_vma);
3230 break;
3231 }
3232 }
3233
3234 free (dynbuf);
3235 }
3236
3237 if (glink != NULL)
3238 {
3239 /* Determine __glink trampoline by reading the relative branch
3240 from the first glink stub. */
3241 bfd_byte buf[4];
3242 if (bfd_get_section_contents (abfd, glink, buf,
3243 glink_vma + 4 - glink->vma, 4))
3244 {
3245 unsigned int insn = bfd_get_32 (abfd, buf);
3246 insn ^= B_DOT;
3247 if ((insn & ~0x3fffffc) == 0)
3248 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3249 }
3250
3251 if (resolv_vma)
3252 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3253
3254 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3255 if (relplt != NULL)
3256 {
3257 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3258 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3259 goto free_contents_and_exit;
3260
3261 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3262 size += plt_count * sizeof (asymbol);
3263
3264 p = relplt->relocation;
3265 for (i = 0; i < plt_count; i++, p++)
3266 {
3267 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3268 if (p->addend != 0)
3269 size += sizeof ("+0x") - 1 + 16;
3270 }
3271 }
3272 }
3273
3274 s = *ret = bfd_malloc (size);
3275 if (s == NULL)
3276 goto free_contents_and_exit;
3277
3278 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3279
3280 for (i = secsymend; i < opdsymend; ++i)
3281 {
3282 bfd_vma ent;
3283
3284 if (syms[i]->value > opd->size - 8)
3285 continue;
3286
3287 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3288 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3289 {
3290 long lo, hi;
3291 size_t len;
3292 asection *sec = abfd->sections;
3293
3294 *s = *syms[i];
3295 lo = codesecsym;
3296 hi = codesecsymend;
3297 while (lo < hi)
3298 {
3299 long mid = (lo + hi) >> 1;
3300 if (syms[mid]->section->vma < ent)
3301 lo = mid + 1;
3302 else if (syms[mid]->section->vma > ent)
3303 hi = mid;
3304 else
3305 {
3306 sec = syms[mid]->section;
3307 break;
3308 }
3309 }
3310
3311 if (lo >= hi && lo > codesecsym)
3312 sec = syms[lo - 1]->section;
3313
3314 for (; sec != NULL; sec = sec->next)
3315 {
3316 if (sec->vma > ent)
3317 break;
3318 if ((sec->flags & SEC_ALLOC) == 0
3319 || (sec->flags & SEC_LOAD) == 0)
3320 break;
3321 if ((sec->flags & SEC_CODE) != 0)
3322 s->section = sec;
3323 }
3324 s->flags |= BSF_SYNTHETIC;
3325 s->value = ent - s->section->vma;
3326 s->name = names;
3327 *names++ = '.';
3328 len = strlen (syms[i]->name);
3329 memcpy (names, syms[i]->name, len + 1);
3330 names += len + 1;
3331 /* Have udata.p point back to the original symbol this
3332 synthetic symbol was derived from. */
3333 s->udata.p = syms[i];
3334 s++;
3335 }
3336 }
3337 free (contents);
3338
3339 if (glink != NULL && relplt != NULL)
3340 {
3341 if (resolv_vma)
3342 {
3343 /* Add a symbol for the main glink trampoline. */
3344 memset (s, 0, sizeof *s);
3345 s->the_bfd = abfd;
3346 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3347 s->section = glink;
3348 s->value = resolv_vma - glink->vma;
3349 s->name = names;
3350 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3351 names += sizeof ("__glink_PLTresolve");
3352 s++;
3353 count++;
3354 }
3355
3356 /* FIXME: It would be very much nicer to put sym@plt on the
3357 stub rather than on the glink branch table entry. The
3358 objdump disassembler would then use a sensible symbol
3359 name on plt calls. The difficulty in doing so is
3360 a) finding the stubs, and,
3361 b) matching stubs against plt entries, and,
3362 c) there can be multiple stubs for a given plt entry.
3363
3364 Solving (a) could be done by code scanning, but older
3365 ppc64 binaries used different stubs to current code.
3366 (b) is the tricky one since you need to known the toc
3367 pointer for at least one function that uses a pic stub to
3368 be able to calculate the plt address referenced.
3369 (c) means gdb would need to set multiple breakpoints (or
3370 find the glink branch itself) when setting breakpoints
3371 for pending shared library loads. */
3372 p = relplt->relocation;
3373 for (i = 0; i < plt_count; i++, p++)
3374 {
3375 size_t len;
3376
3377 *s = **p->sym_ptr_ptr;
3378 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3379 we are defining a symbol, ensure one of them is set. */
3380 if ((s->flags & BSF_LOCAL) == 0)
3381 s->flags |= BSF_GLOBAL;
3382 s->flags |= BSF_SYNTHETIC;
3383 s->section = glink;
3384 s->value = glink_vma - glink->vma;
3385 s->name = names;
3386 s->udata.p = NULL;
3387 len = strlen ((*p->sym_ptr_ptr)->name);
3388 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3389 names += len;
3390 if (p->addend != 0)
3391 {
3392 memcpy (names, "+0x", sizeof ("+0x") - 1);
3393 names += sizeof ("+0x") - 1;
3394 bfd_sprintf_vma (abfd, names, p->addend);
3395 names += strlen (names);
3396 }
3397 memcpy (names, "@plt", sizeof ("@plt"));
3398 names += sizeof ("@plt");
3399 s++;
3400 glink_vma += 8;
3401 if (i >= 0x8000)
3402 glink_vma += 4;
3403 }
3404 count += plt_count;
3405 }
3406 }
3407
3408 done:
3409 free (syms);
3410 return count;
3411 }
3412 \f
3413 /* The following functions are specific to the ELF linker, while
3414 functions above are used generally. Those named ppc64_elf_* are
3415 called by the main ELF linker code. They appear in this file more
3416 or less in the order in which they are called. eg.
3417 ppc64_elf_check_relocs is called early in the link process,
3418 ppc64_elf_finish_dynamic_sections is one of the last functions
3419 called.
3420
3421 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3422 functions have both a function code symbol and a function descriptor
3423 symbol. A call to foo in a relocatable object file looks like:
3424
3425 . .text
3426 . x:
3427 . bl .foo
3428 . nop
3429
3430 The function definition in another object file might be:
3431
3432 . .section .opd
3433 . foo: .quad .foo
3434 . .quad .TOC.@tocbase
3435 . .quad 0
3436 .
3437 . .text
3438 . .foo: blr
3439
3440 When the linker resolves the call during a static link, the branch
3441 unsurprisingly just goes to .foo and the .opd information is unused.
3442 If the function definition is in a shared library, things are a little
3443 different: The call goes via a plt call stub, the opd information gets
3444 copied to the plt, and the linker patches the nop.
3445
3446 . x:
3447 . bl .foo_stub
3448 . ld 2,40(1)
3449 .
3450 .
3451 . .foo_stub:
3452 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3453 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3454 . std 2,40(1) # this is the general idea
3455 . ld 11,0(12)
3456 . ld 2,8(12)
3457 . mtctr 11
3458 . ld 11,16(12)
3459 . bctr
3460 .
3461 . .section .plt
3462 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3463
3464 The "reloc ()" notation is supposed to indicate that the linker emits
3465 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3466 copying.
3467
3468 What are the difficulties here? Well, firstly, the relocations
3469 examined by the linker in check_relocs are against the function code
3470 sym .foo, while the dynamic relocation in the plt is emitted against
3471 the function descriptor symbol, foo. Somewhere along the line, we need
3472 to carefully copy dynamic link information from one symbol to the other.
3473 Secondly, the generic part of the elf linker will make .foo a dynamic
3474 symbol as is normal for most other backends. We need foo dynamic
3475 instead, at least for an application final link. However, when
3476 creating a shared library containing foo, we need to have both symbols
3477 dynamic so that references to .foo are satisfied during the early
3478 stages of linking. Otherwise the linker might decide to pull in a
3479 definition from some other object, eg. a static library.
3480
3481 Update: As of August 2004, we support a new convention. Function
3482 calls may use the function descriptor symbol, ie. "bl foo". This
3483 behaves exactly as "bl .foo". */
3484
3485 /* The linker needs to keep track of the number of relocs that it
3486 decides to copy as dynamic relocs in check_relocs for each symbol.
3487 This is so that it can later discard them if they are found to be
3488 unnecessary. We store the information in a field extending the
3489 regular ELF linker hash table. */
3490
3491 struct ppc_dyn_relocs
3492 {
3493 struct ppc_dyn_relocs *next;
3494
3495 /* The input section of the reloc. */
3496 asection *sec;
3497
3498 /* Total number of relocs copied for the input section. */
3499 bfd_size_type count;
3500
3501 /* Number of pc-relative relocs copied for the input section. */
3502 bfd_size_type pc_count;
3503 };
3504
3505 /* Of those relocs that might be copied as dynamic relocs, this function
3506 selects those that must be copied when linking a shared library,
3507 even when the symbol is local. */
3508
3509 static int
3510 must_be_dyn_reloc (struct bfd_link_info *info,
3511 enum elf_ppc64_reloc_type r_type)
3512 {
3513 switch (r_type)
3514 {
3515 default:
3516 return 1;
3517
3518 case R_PPC64_REL32:
3519 case R_PPC64_REL64:
3520 case R_PPC64_REL30:
3521 return 0;
3522
3523 case R_PPC64_TPREL16:
3524 case R_PPC64_TPREL16_LO:
3525 case R_PPC64_TPREL16_HI:
3526 case R_PPC64_TPREL16_HA:
3527 case R_PPC64_TPREL16_DS:
3528 case R_PPC64_TPREL16_LO_DS:
3529 case R_PPC64_TPREL16_HIGHER:
3530 case R_PPC64_TPREL16_HIGHERA:
3531 case R_PPC64_TPREL16_HIGHEST:
3532 case R_PPC64_TPREL16_HIGHESTA:
3533 case R_PPC64_TPREL64:
3534 return !info->executable;
3535 }
3536 }
3537
3538 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3539 copying dynamic variables from a shared lib into an app's dynbss
3540 section, and instead use a dynamic relocation to point into the
3541 shared lib. With code that gcc generates, it's vital that this be
3542 enabled; In the PowerPC64 ABI, the address of a function is actually
3543 the address of a function descriptor, which resides in the .opd
3544 section. gcc uses the descriptor directly rather than going via the
3545 GOT as some other ABI's do, which means that initialized function
3546 pointers must reference the descriptor. Thus, a function pointer
3547 initialized to the address of a function in a shared library will
3548 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3549 redefines the function descriptor symbol to point to the copy. This
3550 presents a problem as a plt entry for that function is also
3551 initialized from the function descriptor symbol and the copy reloc
3552 may not be initialized first. */
3553 #define ELIMINATE_COPY_RELOCS 1
3554
3555 /* Section name for stubs is the associated section name plus this
3556 string. */
3557 #define STUB_SUFFIX ".stub"
3558
3559 /* Linker stubs.
3560 ppc_stub_long_branch:
3561 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3562 destination, but a 24 bit branch in a stub section will reach.
3563 . b dest
3564
3565 ppc_stub_plt_branch:
3566 Similar to the above, but a 24 bit branch in the stub section won't
3567 reach its destination.
3568 . addis %r12,%r2,xxx@toc@ha
3569 . ld %r11,xxx@toc@l(%r12)
3570 . mtctr %r11
3571 . bctr
3572
3573 ppc_stub_plt_call:
3574 Used to call a function in a shared library. If it so happens that
3575 the plt entry referenced crosses a 64k boundary, then an extra
3576 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3577 . addis %r12,%r2,xxx@toc@ha
3578 . std %r2,40(%r1)
3579 . ld %r11,xxx+0@toc@l(%r12)
3580 . mtctr %r11
3581 . ld %r2,xxx+8@toc@l(%r12)
3582 . ld %r11,xxx+16@toc@l(%r12)
3583 . bctr
3584
3585 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3586 code to adjust the value and save r2 to support multiple toc sections.
3587 A ppc_stub_long_branch with an r2 offset looks like:
3588 . std %r2,40(%r1)
3589 . addis %r2,%r2,off@ha
3590 . addi %r2,%r2,off@l
3591 . b dest
3592
3593 A ppc_stub_plt_branch with an r2 offset looks like:
3594 . std %r2,40(%r1)
3595 . addis %r12,%r2,xxx@toc@ha
3596 . ld %r11,xxx@toc@l(%r12)
3597 . addis %r2,%r2,off@ha
3598 . addi %r2,%r2,off@l
3599 . mtctr %r11
3600 . bctr
3601
3602 In cases where the "addis" instruction would add zero, the "addis" is
3603 omitted and following instructions modified slightly in some cases.
3604 */
3605
3606 enum ppc_stub_type {
3607 ppc_stub_none,
3608 ppc_stub_long_branch,
3609 ppc_stub_long_branch_r2off,
3610 ppc_stub_plt_branch,
3611 ppc_stub_plt_branch_r2off,
3612 ppc_stub_plt_call
3613 };
3614
3615 struct ppc_stub_hash_entry {
3616
3617 /* Base hash table entry structure. */
3618 struct bfd_hash_entry root;
3619
3620 enum ppc_stub_type stub_type;
3621
3622 /* The stub section. */
3623 asection *stub_sec;
3624
3625 /* Offset within stub_sec of the beginning of this stub. */
3626 bfd_vma stub_offset;
3627
3628 /* Given the symbol's value and its section we can determine its final
3629 value when building the stubs (so the stub knows where to jump. */
3630 bfd_vma target_value;
3631 asection *target_section;
3632
3633 /* The symbol table entry, if any, that this was derived from. */
3634 struct ppc_link_hash_entry *h;
3635 struct plt_entry *plt_ent;
3636
3637 /* And the reloc addend that this was derived from. */
3638 bfd_vma addend;
3639
3640 /* Where this stub is being called from, or, in the case of combined
3641 stub sections, the first input section in the group. */
3642 asection *id_sec;
3643 };
3644
3645 struct ppc_branch_hash_entry {
3646
3647 /* Base hash table entry structure. */
3648 struct bfd_hash_entry root;
3649
3650 /* Offset within branch lookup table. */
3651 unsigned int offset;
3652
3653 /* Generation marker. */
3654 unsigned int iter;
3655 };
3656
3657 struct ppc_link_hash_entry
3658 {
3659 struct elf_link_hash_entry elf;
3660
3661 union {
3662 /* A pointer to the most recently used stub hash entry against this
3663 symbol. */
3664 struct ppc_stub_hash_entry *stub_cache;
3665
3666 /* A pointer to the next symbol starting with a '.' */
3667 struct ppc_link_hash_entry *next_dot_sym;
3668 } u;
3669
3670 /* Track dynamic relocs copied for this symbol. */
3671 struct ppc_dyn_relocs *dyn_relocs;
3672
3673 /* Link between function code and descriptor symbols. */
3674 struct ppc_link_hash_entry *oh;
3675
3676 /* Flag function code and descriptor symbols. */
3677 unsigned int is_func:1;
3678 unsigned int is_func_descriptor:1;
3679 unsigned int fake:1;
3680
3681 /* Whether global opd/toc sym has been adjusted or not.
3682 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3683 should be set for all globals defined in any opd/toc section. */
3684 unsigned int adjust_done:1;
3685
3686 /* Set if we twiddled this symbol to weak at some stage. */
3687 unsigned int was_undefined:1;
3688
3689 /* Contexts in which symbol is used in the GOT (or TOC).
3690 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3691 corresponding relocs are encountered during check_relocs.
3692 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3693 indicate the corresponding GOT entry type is not needed.
3694 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3695 a TPREL one. We use a separate flag rather than setting TPREL
3696 just for convenience in distinguishing the two cases. */
3697 #define TLS_GD 1 /* GD reloc. */
3698 #define TLS_LD 2 /* LD reloc. */
3699 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3700 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3701 #define TLS_TLS 16 /* Any TLS reloc. */
3702 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3703 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3704 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3705 unsigned char tls_mask;
3706 };
3707
3708 /* ppc64 ELF linker hash table. */
3709
3710 struct ppc_link_hash_table
3711 {
3712 struct elf_link_hash_table elf;
3713
3714 /* The stub hash table. */
3715 struct bfd_hash_table stub_hash_table;
3716
3717 /* Another hash table for plt_branch stubs. */
3718 struct bfd_hash_table branch_hash_table;
3719
3720 /* Linker stub bfd. */
3721 bfd *stub_bfd;
3722
3723 /* Linker call-backs. */
3724 asection * (*add_stub_section) (const char *, asection *);
3725 void (*layout_sections_again) (void);
3726
3727 /* Array to keep track of which stub sections have been created, and
3728 information on stub grouping. */
3729 struct map_stub {
3730 /* This is the section to which stubs in the group will be attached. */
3731 asection *link_sec;
3732 /* The stub section. */
3733 asection *stub_sec;
3734 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3735 bfd_vma toc_off;
3736 } *stub_group;
3737
3738 /* Temp used when calculating TOC pointers. */
3739 bfd_vma toc_curr;
3740 bfd *toc_bfd;
3741 asection *toc_first_sec;
3742
3743 /* Highest input section id. */
3744 int top_id;
3745
3746 /* Highest output section index. */
3747 int top_index;
3748
3749 /* Used when adding symbols. */
3750 struct ppc_link_hash_entry *dot_syms;
3751
3752 /* List of input sections for each output section. */
3753 asection **input_list;
3754
3755 /* Short-cuts to get to dynamic linker sections. */
3756 asection *got;
3757 asection *plt;
3758 asection *relplt;
3759 asection *iplt;
3760 asection *reliplt;
3761 asection *dynbss;
3762 asection *relbss;
3763 asection *glink;
3764 asection *sfpr;
3765 asection *brlt;
3766 asection *relbrlt;
3767
3768 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3769 struct ppc_link_hash_entry *tls_get_addr;
3770 struct ppc_link_hash_entry *tls_get_addr_fd;
3771
3772 /* The size of reliplt used by got entry relocs. */
3773 bfd_size_type got_reli_size;
3774
3775 /* Statistics. */
3776 unsigned long stub_count[ppc_stub_plt_call];
3777
3778 /* Number of stubs against global syms. */
3779 unsigned long stub_globals;
3780
3781 /* Set if we should emit symbols for stubs. */
3782 unsigned int emit_stub_syms:1;
3783
3784 /* Set if __tls_get_addr optimization should not be done. */
3785 unsigned int no_tls_get_addr_opt:1;
3786
3787 /* Support for multiple toc sections. */
3788 unsigned int do_multi_toc:1;
3789 unsigned int multi_toc_needed:1;
3790 unsigned int second_toc_pass:1;
3791 unsigned int do_toc_opt:1;
3792
3793 /* Set on error. */
3794 unsigned int stub_error:1;
3795
3796 /* Temp used by ppc64_elf_process_dot_syms. */
3797 unsigned int twiddled_syms:1;
3798
3799 /* Incremented every time we size stubs. */
3800 unsigned int stub_iteration;
3801
3802 /* Small local sym cache. */
3803 struct sym_cache sym_cache;
3804 };
3805
3806 /* Rename some of the generic section flags to better document how they
3807 are used here. */
3808
3809 /* Nonzero if this section has TLS related relocations. */
3810 #define has_tls_reloc sec_flg0
3811
3812 /* Nonzero if this section has a call to __tls_get_addr. */
3813 #define has_tls_get_addr_call sec_flg1
3814
3815 /* Nonzero if this section has any toc or got relocs. */
3816 #define has_toc_reloc sec_flg2
3817
3818 /* Nonzero if this section has a call to another section that uses
3819 the toc or got. */
3820 #define makes_toc_func_call sec_flg3
3821
3822 /* Recursion protection when determining above flag. */
3823 #define call_check_in_progress sec_flg4
3824 #define call_check_done sec_flg5
3825
3826 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3827
3828 #define ppc_hash_table(p) \
3829 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3830 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3831
3832 #define ppc_stub_hash_lookup(table, string, create, copy) \
3833 ((struct ppc_stub_hash_entry *) \
3834 bfd_hash_lookup ((table), (string), (create), (copy)))
3835
3836 #define ppc_branch_hash_lookup(table, string, create, copy) \
3837 ((struct ppc_branch_hash_entry *) \
3838 bfd_hash_lookup ((table), (string), (create), (copy)))
3839
3840 /* Create an entry in the stub hash table. */
3841
3842 static struct bfd_hash_entry *
3843 stub_hash_newfunc (struct bfd_hash_entry *entry,
3844 struct bfd_hash_table *table,
3845 const char *string)
3846 {
3847 /* Allocate the structure if it has not already been allocated by a
3848 subclass. */
3849 if (entry == NULL)
3850 {
3851 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3852 if (entry == NULL)
3853 return entry;
3854 }
3855
3856 /* Call the allocation method of the superclass. */
3857 entry = bfd_hash_newfunc (entry, table, string);
3858 if (entry != NULL)
3859 {
3860 struct ppc_stub_hash_entry *eh;
3861
3862 /* Initialize the local fields. */
3863 eh = (struct ppc_stub_hash_entry *) entry;
3864 eh->stub_type = ppc_stub_none;
3865 eh->stub_sec = NULL;
3866 eh->stub_offset = 0;
3867 eh->target_value = 0;
3868 eh->target_section = NULL;
3869 eh->h = NULL;
3870 eh->id_sec = NULL;
3871 }
3872
3873 return entry;
3874 }
3875
3876 /* Create an entry in the branch hash table. */
3877
3878 static struct bfd_hash_entry *
3879 branch_hash_newfunc (struct bfd_hash_entry *entry,
3880 struct bfd_hash_table *table,
3881 const char *string)
3882 {
3883 /* Allocate the structure if it has not already been allocated by a
3884 subclass. */
3885 if (entry == NULL)
3886 {
3887 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3888 if (entry == NULL)
3889 return entry;
3890 }
3891
3892 /* Call the allocation method of the superclass. */
3893 entry = bfd_hash_newfunc (entry, table, string);
3894 if (entry != NULL)
3895 {
3896 struct ppc_branch_hash_entry *eh;
3897
3898 /* Initialize the local fields. */
3899 eh = (struct ppc_branch_hash_entry *) entry;
3900 eh->offset = 0;
3901 eh->iter = 0;
3902 }
3903
3904 return entry;
3905 }
3906
3907 /* Create an entry in a ppc64 ELF linker hash table. */
3908
3909 static struct bfd_hash_entry *
3910 link_hash_newfunc (struct bfd_hash_entry *entry,
3911 struct bfd_hash_table *table,
3912 const char *string)
3913 {
3914 /* Allocate the structure if it has not already been allocated by a
3915 subclass. */
3916 if (entry == NULL)
3917 {
3918 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3919 if (entry == NULL)
3920 return entry;
3921 }
3922
3923 /* Call the allocation method of the superclass. */
3924 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3925 if (entry != NULL)
3926 {
3927 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3928
3929 memset (&eh->u.stub_cache, 0,
3930 (sizeof (struct ppc_link_hash_entry)
3931 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3932
3933 /* When making function calls, old ABI code references function entry
3934 points (dot symbols), while new ABI code references the function
3935 descriptor symbol. We need to make any combination of reference and
3936 definition work together, without breaking archive linking.
3937
3938 For a defined function "foo" and an undefined call to "bar":
3939 An old object defines "foo" and ".foo", references ".bar" (possibly
3940 "bar" too).
3941 A new object defines "foo" and references "bar".
3942
3943 A new object thus has no problem with its undefined symbols being
3944 satisfied by definitions in an old object. On the other hand, the
3945 old object won't have ".bar" satisfied by a new object.
3946
3947 Keep a list of newly added dot-symbols. */
3948
3949 if (string[0] == '.')
3950 {
3951 struct ppc_link_hash_table *htab;
3952
3953 htab = (struct ppc_link_hash_table *) table;
3954 eh->u.next_dot_sym = htab->dot_syms;
3955 htab->dot_syms = eh;
3956 }
3957 }
3958
3959 return entry;
3960 }
3961
3962 /* Create a ppc64 ELF linker hash table. */
3963
3964 static struct bfd_link_hash_table *
3965 ppc64_elf_link_hash_table_create (bfd *abfd)
3966 {
3967 struct ppc_link_hash_table *htab;
3968 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3969
3970 htab = bfd_zmalloc (amt);
3971 if (htab == NULL)
3972 return NULL;
3973
3974 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3975 sizeof (struct ppc_link_hash_entry),
3976 PPC64_ELF_DATA))
3977 {
3978 free (htab);
3979 return NULL;
3980 }
3981
3982 /* Init the stub hash table too. */
3983 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3984 sizeof (struct ppc_stub_hash_entry)))
3985 return NULL;
3986
3987 /* And the branch hash table. */
3988 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3989 sizeof (struct ppc_branch_hash_entry)))
3990 return NULL;
3991
3992 /* Initializing two fields of the union is just cosmetic. We really
3993 only care about glist, but when compiled on a 32-bit host the
3994 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3995 debugger inspection of these fields look nicer. */
3996 htab->elf.init_got_refcount.refcount = 0;
3997 htab->elf.init_got_refcount.glist = NULL;
3998 htab->elf.init_plt_refcount.refcount = 0;
3999 htab->elf.init_plt_refcount.glist = NULL;
4000 htab->elf.init_got_offset.offset = 0;
4001 htab->elf.init_got_offset.glist = NULL;
4002 htab->elf.init_plt_offset.offset = 0;
4003 htab->elf.init_plt_offset.glist = NULL;
4004
4005 return &htab->elf.root;
4006 }
4007
4008 /* Free the derived linker hash table. */
4009
4010 static void
4011 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4012 {
4013 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4014
4015 bfd_hash_table_free (&ret->stub_hash_table);
4016 bfd_hash_table_free (&ret->branch_hash_table);
4017 _bfd_generic_link_hash_table_free (hash);
4018 }
4019
4020 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4021
4022 void
4023 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4024 {
4025 struct ppc_link_hash_table *htab;
4026
4027 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4028
4029 /* Always hook our dynamic sections into the first bfd, which is the
4030 linker created stub bfd. This ensures that the GOT header is at
4031 the start of the output TOC section. */
4032 htab = ppc_hash_table (info);
4033 if (htab == NULL)
4034 return;
4035 htab->stub_bfd = abfd;
4036 htab->elf.dynobj = abfd;
4037 }
4038
4039 /* Build a name for an entry in the stub hash table. */
4040
4041 static char *
4042 ppc_stub_name (const asection *input_section,
4043 const asection *sym_sec,
4044 const struct ppc_link_hash_entry *h,
4045 const Elf_Internal_Rela *rel)
4046 {
4047 char *stub_name;
4048 bfd_size_type len;
4049
4050 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4051 offsets from a sym as a branch target? In fact, we could
4052 probably assume the addend is always zero. */
4053 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4054
4055 if (h)
4056 {
4057 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4058 stub_name = bfd_malloc (len);
4059 if (stub_name == NULL)
4060 return stub_name;
4061
4062 sprintf (stub_name, "%08x.%s+%x",
4063 input_section->id & 0xffffffff,
4064 h->elf.root.root.string,
4065 (int) rel->r_addend & 0xffffffff);
4066 }
4067 else
4068 {
4069 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4070 stub_name = bfd_malloc (len);
4071 if (stub_name == NULL)
4072 return stub_name;
4073
4074 sprintf (stub_name, "%08x.%x:%x+%x",
4075 input_section->id & 0xffffffff,
4076 sym_sec->id & 0xffffffff,
4077 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4078 (int) rel->r_addend & 0xffffffff);
4079 }
4080 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4081 stub_name[len - 2] = 0;
4082 return stub_name;
4083 }
4084
4085 /* Look up an entry in the stub hash. Stub entries are cached because
4086 creating the stub name takes a bit of time. */
4087
4088 static struct ppc_stub_hash_entry *
4089 ppc_get_stub_entry (const asection *input_section,
4090 const asection *sym_sec,
4091 struct ppc_link_hash_entry *h,
4092 const Elf_Internal_Rela *rel,
4093 struct ppc_link_hash_table *htab)
4094 {
4095 struct ppc_stub_hash_entry *stub_entry;
4096 const asection *id_sec;
4097
4098 /* If this input section is part of a group of sections sharing one
4099 stub section, then use the id of the first section in the group.
4100 Stub names need to include a section id, as there may well be
4101 more than one stub used to reach say, printf, and we need to
4102 distinguish between them. */
4103 id_sec = htab->stub_group[input_section->id].link_sec;
4104
4105 if (h != NULL && h->u.stub_cache != NULL
4106 && h->u.stub_cache->h == h
4107 && h->u.stub_cache->id_sec == id_sec)
4108 {
4109 stub_entry = h->u.stub_cache;
4110 }
4111 else
4112 {
4113 char *stub_name;
4114
4115 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4116 if (stub_name == NULL)
4117 return NULL;
4118
4119 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4120 stub_name, FALSE, FALSE);
4121 if (h != NULL)
4122 h->u.stub_cache = stub_entry;
4123
4124 free (stub_name);
4125 }
4126
4127 return stub_entry;
4128 }
4129
4130 /* Add a new stub entry to the stub hash. Not all fields of the new
4131 stub entry are initialised. */
4132
4133 static struct ppc_stub_hash_entry *
4134 ppc_add_stub (const char *stub_name,
4135 asection *section,
4136 struct ppc_link_hash_table *htab)
4137 {
4138 asection *link_sec;
4139 asection *stub_sec;
4140 struct ppc_stub_hash_entry *stub_entry;
4141
4142 link_sec = htab->stub_group[section->id].link_sec;
4143 stub_sec = htab->stub_group[section->id].stub_sec;
4144 if (stub_sec == NULL)
4145 {
4146 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4147 if (stub_sec == NULL)
4148 {
4149 size_t namelen;
4150 bfd_size_type len;
4151 char *s_name;
4152
4153 namelen = strlen (link_sec->name);
4154 len = namelen + sizeof (STUB_SUFFIX);
4155 s_name = bfd_alloc (htab->stub_bfd, len);
4156 if (s_name == NULL)
4157 return NULL;
4158
4159 memcpy (s_name, link_sec->name, namelen);
4160 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4161 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4162 if (stub_sec == NULL)
4163 return NULL;
4164 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4165 }
4166 htab->stub_group[section->id].stub_sec = stub_sec;
4167 }
4168
4169 /* Enter this entry into the linker stub hash table. */
4170 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4171 TRUE, FALSE);
4172 if (stub_entry == NULL)
4173 {
4174 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4175 section->owner, stub_name);
4176 return NULL;
4177 }
4178
4179 stub_entry->stub_sec = stub_sec;
4180 stub_entry->stub_offset = 0;
4181 stub_entry->id_sec = link_sec;
4182 return stub_entry;
4183 }
4184
4185 /* Create sections for linker generated code. */
4186
4187 static bfd_boolean
4188 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4189 {
4190 struct ppc_link_hash_table *htab;
4191 flagword flags;
4192
4193 htab = ppc_hash_table (info);
4194 if (htab == NULL)
4195 return FALSE;
4196
4197 /* Create .sfpr for code to save and restore fp regs. */
4198 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4199 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4200 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4201 flags);
4202 if (htab->sfpr == NULL
4203 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4204 return FALSE;
4205
4206 /* Create .glink for lazy dynamic linking support. */
4207 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4208 flags);
4209 if (htab->glink == NULL
4210 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4211 return FALSE;
4212
4213 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4214 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4215 if (htab->iplt == NULL
4216 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4217 return FALSE;
4218
4219 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4220 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4221 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4222 ".rela.iplt",
4223 flags);
4224 if (htab->reliplt == NULL
4225 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4226 return FALSE;
4227
4228 /* Create branch lookup table for plt_branch stubs. */
4229 flags = (SEC_ALLOC | SEC_LOAD
4230 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4231 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4232 flags);
4233 if (htab->brlt == NULL
4234 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4235 return FALSE;
4236
4237 if (!info->shared)
4238 return TRUE;
4239
4240 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4241 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4242 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4243 ".rela.branch_lt",
4244 flags);
4245 if (htab->relbrlt == NULL
4246 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4247 return FALSE;
4248
4249 return TRUE;
4250 }
4251
4252 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4253 not already done. */
4254
4255 static bfd_boolean
4256 create_got_section (bfd *abfd, struct bfd_link_info *info)
4257 {
4258 asection *got, *relgot;
4259 flagword flags;
4260 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4261
4262 if (!is_ppc64_elf (abfd))
4263 return FALSE;
4264 if (htab == NULL)
4265 return FALSE;
4266
4267 if (!htab->got)
4268 {
4269 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4270 return FALSE;
4271
4272 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4273 if (!htab->got)
4274 abort ();
4275 }
4276
4277 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4278 | SEC_LINKER_CREATED);
4279
4280 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4281 if (!got
4282 || !bfd_set_section_alignment (abfd, got, 3))
4283 return FALSE;
4284
4285 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4286 flags | SEC_READONLY);
4287 if (!relgot
4288 || ! bfd_set_section_alignment (abfd, relgot, 3))
4289 return FALSE;
4290
4291 ppc64_elf_tdata (abfd)->got = got;
4292 ppc64_elf_tdata (abfd)->relgot = relgot;
4293 return TRUE;
4294 }
4295
4296 /* Create the dynamic sections, and set up shortcuts. */
4297
4298 static bfd_boolean
4299 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4300 {
4301 struct ppc_link_hash_table *htab;
4302
4303 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4304 return FALSE;
4305
4306 htab = ppc_hash_table (info);
4307 if (htab == NULL)
4308 return FALSE;
4309
4310 if (!htab->got)
4311 htab->got = bfd_get_section_by_name (dynobj, ".got");
4312 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4313 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4314 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4315 if (!info->shared)
4316 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4317
4318 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4319 || (!info->shared && !htab->relbss))
4320 abort ();
4321
4322 return TRUE;
4323 }
4324
4325 /* Follow indirect and warning symbol links. */
4326
4327 static inline struct bfd_link_hash_entry *
4328 follow_link (struct bfd_link_hash_entry *h)
4329 {
4330 while (h->type == bfd_link_hash_indirect
4331 || h->type == bfd_link_hash_warning)
4332 h = h->u.i.link;
4333 return h;
4334 }
4335
4336 static inline struct elf_link_hash_entry *
4337 elf_follow_link (struct elf_link_hash_entry *h)
4338 {
4339 return (struct elf_link_hash_entry *) follow_link (&h->root);
4340 }
4341
4342 static inline struct ppc_link_hash_entry *
4343 ppc_follow_link (struct ppc_link_hash_entry *h)
4344 {
4345 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4346 }
4347
4348 /* Merge PLT info on FROM with that on TO. */
4349
4350 static void
4351 move_plt_plist (struct ppc_link_hash_entry *from,
4352 struct ppc_link_hash_entry *to)
4353 {
4354 if (from->elf.plt.plist != NULL)
4355 {
4356 if (to->elf.plt.plist != NULL)
4357 {
4358 struct plt_entry **entp;
4359 struct plt_entry *ent;
4360
4361 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4362 {
4363 struct plt_entry *dent;
4364
4365 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4366 if (dent->addend == ent->addend)
4367 {
4368 dent->plt.refcount += ent->plt.refcount;
4369 *entp = ent->next;
4370 break;
4371 }
4372 if (dent == NULL)
4373 entp = &ent->next;
4374 }
4375 *entp = to->elf.plt.plist;
4376 }
4377
4378 to->elf.plt.plist = from->elf.plt.plist;
4379 from->elf.plt.plist = NULL;
4380 }
4381 }
4382
4383 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4384
4385 static void
4386 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4387 struct elf_link_hash_entry *dir,
4388 struct elf_link_hash_entry *ind)
4389 {
4390 struct ppc_link_hash_entry *edir, *eind;
4391
4392 edir = (struct ppc_link_hash_entry *) dir;
4393 eind = (struct ppc_link_hash_entry *) ind;
4394
4395 /* Copy over any dynamic relocs we may have on the indirect sym. */
4396 if (eind->dyn_relocs != NULL)
4397 {
4398 if (edir->dyn_relocs != NULL)
4399 {
4400 struct ppc_dyn_relocs **pp;
4401 struct ppc_dyn_relocs *p;
4402
4403 /* Add reloc counts against the indirect sym to the direct sym
4404 list. Merge any entries against the same section. */
4405 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4406 {
4407 struct ppc_dyn_relocs *q;
4408
4409 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4410 if (q->sec == p->sec)
4411 {
4412 q->pc_count += p->pc_count;
4413 q->count += p->count;
4414 *pp = p->next;
4415 break;
4416 }
4417 if (q == NULL)
4418 pp = &p->next;
4419 }
4420 *pp = edir->dyn_relocs;
4421 }
4422
4423 edir->dyn_relocs = eind->dyn_relocs;
4424 eind->dyn_relocs = NULL;
4425 }
4426
4427 edir->is_func |= eind->is_func;
4428 edir->is_func_descriptor |= eind->is_func_descriptor;
4429 edir->tls_mask |= eind->tls_mask;
4430 if (eind->oh != NULL)
4431 edir->oh = ppc_follow_link (eind->oh);
4432
4433 /* If called to transfer flags for a weakdef during processing
4434 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4435 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4436 if (!(ELIMINATE_COPY_RELOCS
4437 && eind->elf.root.type != bfd_link_hash_indirect
4438 && edir->elf.dynamic_adjusted))
4439 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4440
4441 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4442 edir->elf.ref_regular |= eind->elf.ref_regular;
4443 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4444 edir->elf.needs_plt |= eind->elf.needs_plt;
4445
4446 /* If we were called to copy over info for a weak sym, that's all. */
4447 if (eind->elf.root.type != bfd_link_hash_indirect)
4448 return;
4449
4450 /* Copy over got entries that we may have already seen to the
4451 symbol which just became indirect. */
4452 if (eind->elf.got.glist != NULL)
4453 {
4454 if (edir->elf.got.glist != NULL)
4455 {
4456 struct got_entry **entp;
4457 struct got_entry *ent;
4458
4459 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4460 {
4461 struct got_entry *dent;
4462
4463 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4464 if (dent->addend == ent->addend
4465 && dent->owner == ent->owner
4466 && dent->tls_type == ent->tls_type)
4467 {
4468 dent->got.refcount += ent->got.refcount;
4469 *entp = ent->next;
4470 break;
4471 }
4472 if (dent == NULL)
4473 entp = &ent->next;
4474 }
4475 *entp = edir->elf.got.glist;
4476 }
4477
4478 edir->elf.got.glist = eind->elf.got.glist;
4479 eind->elf.got.glist = NULL;
4480 }
4481
4482 /* And plt entries. */
4483 move_plt_plist (eind, edir);
4484
4485 if (eind->elf.dynindx != -1)
4486 {
4487 if (edir->elf.dynindx != -1)
4488 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4489 edir->elf.dynstr_index);
4490 edir->elf.dynindx = eind->elf.dynindx;
4491 edir->elf.dynstr_index = eind->elf.dynstr_index;
4492 eind->elf.dynindx = -1;
4493 eind->elf.dynstr_index = 0;
4494 }
4495 }
4496
4497 /* Find the function descriptor hash entry from the given function code
4498 hash entry FH. Link the entries via their OH fields. */
4499
4500 static struct ppc_link_hash_entry *
4501 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4502 {
4503 struct ppc_link_hash_entry *fdh = fh->oh;
4504
4505 if (fdh == NULL)
4506 {
4507 const char *fd_name = fh->elf.root.root.string + 1;
4508
4509 fdh = (struct ppc_link_hash_entry *)
4510 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4511 if (fdh == NULL)
4512 return fdh;
4513
4514 fdh->is_func_descriptor = 1;
4515 fdh->oh = fh;
4516 fh->is_func = 1;
4517 fh->oh = fdh;
4518 }
4519
4520 return ppc_follow_link (fdh);
4521 }
4522
4523 /* Make a fake function descriptor sym for the code sym FH. */
4524
4525 static struct ppc_link_hash_entry *
4526 make_fdh (struct bfd_link_info *info,
4527 struct ppc_link_hash_entry *fh)
4528 {
4529 bfd *abfd;
4530 asymbol *newsym;
4531 struct bfd_link_hash_entry *bh;
4532 struct ppc_link_hash_entry *fdh;
4533
4534 abfd = fh->elf.root.u.undef.abfd;
4535 newsym = bfd_make_empty_symbol (abfd);
4536 newsym->name = fh->elf.root.root.string + 1;
4537 newsym->section = bfd_und_section_ptr;
4538 newsym->value = 0;
4539 newsym->flags = BSF_WEAK;
4540
4541 bh = NULL;
4542 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4543 newsym->flags, newsym->section,
4544 newsym->value, NULL, FALSE, FALSE,
4545 &bh))
4546 return NULL;
4547
4548 fdh = (struct ppc_link_hash_entry *) bh;
4549 fdh->elf.non_elf = 0;
4550 fdh->fake = 1;
4551 fdh->is_func_descriptor = 1;
4552 fdh->oh = fh;
4553 fh->is_func = 1;
4554 fh->oh = fdh;
4555 return fdh;
4556 }
4557
4558 /* Fix function descriptor symbols defined in .opd sections to be
4559 function type. */
4560
4561 static bfd_boolean
4562 ppc64_elf_add_symbol_hook (bfd *ibfd,
4563 struct bfd_link_info *info,
4564 Elf_Internal_Sym *isym,
4565 const char **name ATTRIBUTE_UNUSED,
4566 flagword *flags ATTRIBUTE_UNUSED,
4567 asection **sec,
4568 bfd_vma *value ATTRIBUTE_UNUSED)
4569 {
4570 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4571 {
4572 if ((ibfd->flags & DYNAMIC) == 0)
4573 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4574 }
4575 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4576 ;
4577 else if (*sec != NULL
4578 && strcmp ((*sec)->name, ".opd") == 0)
4579 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4580
4581 return TRUE;
4582 }
4583
4584 /* This function makes an old ABI object reference to ".bar" cause the
4585 inclusion of a new ABI object archive that defines "bar".
4586 NAME is a symbol defined in an archive. Return a symbol in the hash
4587 table that might be satisfied by the archive symbols. */
4588
4589 static struct elf_link_hash_entry *
4590 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4591 struct bfd_link_info *info,
4592 const char *name)
4593 {
4594 struct elf_link_hash_entry *h;
4595 char *dot_name;
4596 size_t len;
4597
4598 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4599 if (h != NULL
4600 /* Don't return this sym if it is a fake function descriptor
4601 created by add_symbol_adjust. */
4602 && !(h->root.type == bfd_link_hash_undefweak
4603 && ((struct ppc_link_hash_entry *) h)->fake))
4604 return h;
4605
4606 if (name[0] == '.')
4607 return h;
4608
4609 len = strlen (name);
4610 dot_name = bfd_alloc (abfd, len + 2);
4611 if (dot_name == NULL)
4612 return (struct elf_link_hash_entry *) 0 - 1;
4613 dot_name[0] = '.';
4614 memcpy (dot_name + 1, name, len + 1);
4615 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4616 bfd_release (abfd, dot_name);
4617 return h;
4618 }
4619
4620 /* This function satisfies all old ABI object references to ".bar" if a
4621 new ABI object defines "bar". Well, at least, undefined dot symbols
4622 are made weak. This stops later archive searches from including an
4623 object if we already have a function descriptor definition. It also
4624 prevents the linker complaining about undefined symbols.
4625 We also check and correct mismatched symbol visibility here. The
4626 most restrictive visibility of the function descriptor and the
4627 function entry symbol is used. */
4628
4629 static bfd_boolean
4630 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4631 {
4632 struct ppc_link_hash_table *htab;
4633 struct ppc_link_hash_entry *fdh;
4634
4635 if (eh->elf.root.type == bfd_link_hash_indirect)
4636 return TRUE;
4637
4638 if (eh->elf.root.type == bfd_link_hash_warning)
4639 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4640
4641 if (eh->elf.root.root.string[0] != '.')
4642 abort ();
4643
4644 htab = ppc_hash_table (info);
4645 if (htab == NULL)
4646 return FALSE;
4647
4648 fdh = lookup_fdh (eh, htab);
4649 if (fdh == NULL)
4650 {
4651 if (!info->relocatable
4652 && (eh->elf.root.type == bfd_link_hash_undefined
4653 || eh->elf.root.type == bfd_link_hash_undefweak)
4654 && eh->elf.ref_regular)
4655 {
4656 /* Make an undefweak function descriptor sym, which is enough to
4657 pull in an --as-needed shared lib, but won't cause link
4658 errors. Archives are handled elsewhere. */
4659 fdh = make_fdh (info, eh);
4660 if (fdh == NULL)
4661 return FALSE;
4662 fdh->elf.ref_regular = 1;
4663 }
4664 }
4665 else
4666 {
4667 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4668 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4669 if (entry_vis < descr_vis)
4670 fdh->elf.other += entry_vis - descr_vis;
4671 else if (entry_vis > descr_vis)
4672 eh->elf.other += descr_vis - entry_vis;
4673
4674 if ((fdh->elf.root.type == bfd_link_hash_defined
4675 || fdh->elf.root.type == bfd_link_hash_defweak)
4676 && eh->elf.root.type == bfd_link_hash_undefined)
4677 {
4678 eh->elf.root.type = bfd_link_hash_undefweak;
4679 eh->was_undefined = 1;
4680 htab->twiddled_syms = 1;
4681 }
4682 }
4683
4684 return TRUE;
4685 }
4686
4687 /* Process list of dot-symbols we made in link_hash_newfunc. */
4688
4689 static bfd_boolean
4690 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4691 {
4692 struct ppc_link_hash_table *htab;
4693 struct ppc_link_hash_entry **p, *eh;
4694
4695 if (!is_ppc64_elf (info->output_bfd))
4696 return TRUE;
4697 htab = ppc_hash_table (info);
4698 if (htab == NULL)
4699 return FALSE;
4700
4701 if (is_ppc64_elf (ibfd))
4702 {
4703 p = &htab->dot_syms;
4704 while ((eh = *p) != NULL)
4705 {
4706 *p = NULL;
4707 if (!add_symbol_adjust (eh, info))
4708 return FALSE;
4709 p = &eh->u.next_dot_sym;
4710 }
4711 }
4712
4713 /* Clear the list for non-ppc64 input files. */
4714 p = &htab->dot_syms;
4715 while ((eh = *p) != NULL)
4716 {
4717 *p = NULL;
4718 p = &eh->u.next_dot_sym;
4719 }
4720
4721 /* We need to fix the undefs list for any syms we have twiddled to
4722 undef_weak. */
4723 if (htab->twiddled_syms)
4724 {
4725 bfd_link_repair_undef_list (&htab->elf.root);
4726 htab->twiddled_syms = 0;
4727 }
4728 return TRUE;
4729 }
4730
4731 /* Undo hash table changes when an --as-needed input file is determined
4732 not to be needed. */
4733
4734 static bfd_boolean
4735 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4736 struct bfd_link_info *info)
4737 {
4738 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4739
4740 if (htab == NULL)
4741 return FALSE;
4742
4743 htab->dot_syms = NULL;
4744 return TRUE;
4745 }
4746
4747 static struct plt_entry **
4748 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4749 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4750 {
4751 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4752 struct plt_entry **local_plt;
4753 unsigned char *local_got_tls_masks;
4754
4755 if (local_got_ents == NULL)
4756 {
4757 bfd_size_type size = symtab_hdr->sh_info;
4758
4759 size *= (sizeof (*local_got_ents)
4760 + sizeof (*local_plt)
4761 + sizeof (*local_got_tls_masks));
4762 local_got_ents = bfd_zalloc (abfd, size);
4763 if (local_got_ents == NULL)
4764 return NULL;
4765 elf_local_got_ents (abfd) = local_got_ents;
4766 }
4767
4768 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4769 {
4770 struct got_entry *ent;
4771
4772 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4773 if (ent->addend == r_addend
4774 && ent->owner == abfd
4775 && ent->tls_type == tls_type)
4776 break;
4777 if (ent == NULL)
4778 {
4779 bfd_size_type amt = sizeof (*ent);
4780 ent = bfd_alloc (abfd, amt);
4781 if (ent == NULL)
4782 return FALSE;
4783 ent->next = local_got_ents[r_symndx];
4784 ent->addend = r_addend;
4785 ent->owner = abfd;
4786 ent->tls_type = tls_type;
4787 ent->is_indirect = FALSE;
4788 ent->got.refcount = 0;
4789 local_got_ents[r_symndx] = ent;
4790 }
4791 ent->got.refcount += 1;
4792 }
4793
4794 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4795 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4796 local_got_tls_masks[r_symndx] |= tls_type;
4797
4798 return local_plt + r_symndx;
4799 }
4800
4801 static bfd_boolean
4802 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4803 {
4804 struct plt_entry *ent;
4805
4806 for (ent = *plist; ent != NULL; ent = ent->next)
4807 if (ent->addend == addend)
4808 break;
4809 if (ent == NULL)
4810 {
4811 bfd_size_type amt = sizeof (*ent);
4812 ent = bfd_alloc (abfd, amt);
4813 if (ent == NULL)
4814 return FALSE;
4815 ent->next = *plist;
4816 ent->addend = addend;
4817 ent->plt.refcount = 0;
4818 *plist = ent;
4819 }
4820 ent->plt.refcount += 1;
4821 return TRUE;
4822 }
4823
4824 static bfd_boolean
4825 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4826 {
4827 return (r_type == R_PPC64_REL24
4828 || r_type == R_PPC64_REL14
4829 || r_type == R_PPC64_REL14_BRTAKEN
4830 || r_type == R_PPC64_REL14_BRNTAKEN
4831 || r_type == R_PPC64_ADDR24
4832 || r_type == R_PPC64_ADDR14
4833 || r_type == R_PPC64_ADDR14_BRTAKEN
4834 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4835 }
4836
4837 /* Look through the relocs for a section during the first phase, and
4838 calculate needed space in the global offset table, procedure
4839 linkage table, and dynamic reloc sections. */
4840
4841 static bfd_boolean
4842 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4843 asection *sec, const Elf_Internal_Rela *relocs)
4844 {
4845 struct ppc_link_hash_table *htab;
4846 Elf_Internal_Shdr *symtab_hdr;
4847 struct elf_link_hash_entry **sym_hashes;
4848 const Elf_Internal_Rela *rel;
4849 const Elf_Internal_Rela *rel_end;
4850 asection *sreloc;
4851 asection **opd_sym_map;
4852 struct elf_link_hash_entry *tga, *dottga;
4853
4854 if (info->relocatable)
4855 return TRUE;
4856
4857 /* Don't do anything special with non-loaded, non-alloced sections.
4858 In particular, any relocs in such sections should not affect GOT
4859 and PLT reference counting (ie. we don't allow them to create GOT
4860 or PLT entries), there's no possibility or desire to optimize TLS
4861 relocs, and there's not much point in propagating relocs to shared
4862 libs that the dynamic linker won't relocate. */
4863 if ((sec->flags & SEC_ALLOC) == 0)
4864 return TRUE;
4865
4866 BFD_ASSERT (is_ppc64_elf (abfd));
4867
4868 htab = ppc_hash_table (info);
4869 if (htab == NULL)
4870 return FALSE;
4871
4872 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4873 FALSE, FALSE, TRUE);
4874 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4875 FALSE, FALSE, TRUE);
4876 symtab_hdr = &elf_symtab_hdr (abfd);
4877 sym_hashes = elf_sym_hashes (abfd);
4878 sreloc = NULL;
4879 opd_sym_map = NULL;
4880 if (strcmp (sec->name, ".opd") == 0)
4881 {
4882 /* Garbage collection needs some extra help with .opd sections.
4883 We don't want to necessarily keep everything referenced by
4884 relocs in .opd, as that would keep all functions. Instead,
4885 if we reference an .opd symbol (a function descriptor), we
4886 want to keep the function code symbol's section. This is
4887 easy for global symbols, but for local syms we need to keep
4888 information about the associated function section. */
4889 bfd_size_type amt;
4890
4891 amt = sec->size * sizeof (*opd_sym_map) / 8;
4892 opd_sym_map = bfd_zalloc (abfd, amt);
4893 if (opd_sym_map == NULL)
4894 return FALSE;
4895 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4896 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4897 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4898 }
4899
4900 if (htab->sfpr == NULL
4901 && !create_linkage_sections (htab->elf.dynobj, info))
4902 return FALSE;
4903
4904 rel_end = relocs + sec->reloc_count;
4905 for (rel = relocs; rel < rel_end; rel++)
4906 {
4907 unsigned long r_symndx;
4908 struct elf_link_hash_entry *h;
4909 enum elf_ppc64_reloc_type r_type;
4910 int tls_type;
4911 struct _ppc64_elf_section_data *ppc64_sec;
4912 struct plt_entry **ifunc;
4913
4914 r_symndx = ELF64_R_SYM (rel->r_info);
4915 if (r_symndx < symtab_hdr->sh_info)
4916 h = NULL;
4917 else
4918 {
4919 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4920 h = elf_follow_link (h);
4921 }
4922
4923 tls_type = 0;
4924 ifunc = NULL;
4925 if (h != NULL)
4926 {
4927 if (h->type == STT_GNU_IFUNC)
4928 {
4929 h->needs_plt = 1;
4930 ifunc = &h->plt.plist;
4931 }
4932 }
4933 else
4934 {
4935 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4936 abfd, r_symndx);
4937 if (isym == NULL)
4938 return FALSE;
4939
4940 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4941 {
4942 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4943 rel->r_addend, PLT_IFUNC);
4944 if (ifunc == NULL)
4945 return FALSE;
4946 }
4947 }
4948 r_type = ELF64_R_TYPE (rel->r_info);
4949 if (is_branch_reloc (r_type))
4950 {
4951 if (h != NULL && (h == tga || h == dottga))
4952 {
4953 if (rel != relocs
4954 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4955 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4956 /* We have a new-style __tls_get_addr call with a marker
4957 reloc. */
4958 ;
4959 else
4960 /* Mark this section as having an old-style call. */
4961 sec->has_tls_get_addr_call = 1;
4962 }
4963
4964 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4965 if (ifunc != NULL
4966 && !update_plt_info (abfd, ifunc, rel->r_addend))
4967 return FALSE;
4968 }
4969
4970 switch (r_type)
4971 {
4972 case R_PPC64_TLSGD:
4973 case R_PPC64_TLSLD:
4974 /* These special tls relocs tie a call to __tls_get_addr with
4975 its parameter symbol. */
4976 break;
4977
4978 case R_PPC64_GOT_TLSLD16:
4979 case R_PPC64_GOT_TLSLD16_LO:
4980 case R_PPC64_GOT_TLSLD16_HI:
4981 case R_PPC64_GOT_TLSLD16_HA:
4982 tls_type = TLS_TLS | TLS_LD;
4983 goto dogottls;
4984
4985 case R_PPC64_GOT_TLSGD16:
4986 case R_PPC64_GOT_TLSGD16_LO:
4987 case R_PPC64_GOT_TLSGD16_HI:
4988 case R_PPC64_GOT_TLSGD16_HA:
4989 tls_type = TLS_TLS | TLS_GD;
4990 goto dogottls;
4991
4992 case R_PPC64_GOT_TPREL16_DS:
4993 case R_PPC64_GOT_TPREL16_LO_DS:
4994 case R_PPC64_GOT_TPREL16_HI:
4995 case R_PPC64_GOT_TPREL16_HA:
4996 if (!info->executable)
4997 info->flags |= DF_STATIC_TLS;
4998 tls_type = TLS_TLS | TLS_TPREL;
4999 goto dogottls;
5000
5001 case R_PPC64_GOT_DTPREL16_DS:
5002 case R_PPC64_GOT_DTPREL16_LO_DS:
5003 case R_PPC64_GOT_DTPREL16_HI:
5004 case R_PPC64_GOT_DTPREL16_HA:
5005 tls_type = TLS_TLS | TLS_DTPREL;
5006 dogottls:
5007 sec->has_tls_reloc = 1;
5008 /* Fall thru */
5009
5010 case R_PPC64_GOT16:
5011 case R_PPC64_GOT16_DS:
5012 case R_PPC64_GOT16_HA:
5013 case R_PPC64_GOT16_HI:
5014 case R_PPC64_GOT16_LO:
5015 case R_PPC64_GOT16_LO_DS:
5016 /* This symbol requires a global offset table entry. */
5017 sec->has_toc_reloc = 1;
5018 if (r_type == R_PPC64_GOT_TLSLD16
5019 || r_type == R_PPC64_GOT_TLSGD16
5020 || r_type == R_PPC64_GOT_TPREL16_DS
5021 || r_type == R_PPC64_GOT_DTPREL16_DS
5022 || r_type == R_PPC64_GOT16
5023 || r_type == R_PPC64_GOT16_DS)
5024 {
5025 htab->do_multi_toc = 1;
5026 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5027 }
5028
5029 if (ppc64_elf_tdata (abfd)->got == NULL
5030 && !create_got_section (abfd, info))
5031 return FALSE;
5032
5033 if (h != NULL)
5034 {
5035 struct ppc_link_hash_entry *eh;
5036 struct got_entry *ent;
5037
5038 eh = (struct ppc_link_hash_entry *) h;
5039 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5040 if (ent->addend == rel->r_addend
5041 && ent->owner == abfd
5042 && ent->tls_type == tls_type)
5043 break;
5044 if (ent == NULL)
5045 {
5046 bfd_size_type amt = sizeof (*ent);
5047 ent = bfd_alloc (abfd, amt);
5048 if (ent == NULL)
5049 return FALSE;
5050 ent->next = eh->elf.got.glist;
5051 ent->addend = rel->r_addend;
5052 ent->owner = abfd;
5053 ent->tls_type = tls_type;
5054 ent->is_indirect = FALSE;
5055 ent->got.refcount = 0;
5056 eh->elf.got.glist = ent;
5057 }
5058 ent->got.refcount += 1;
5059 eh->tls_mask |= tls_type;
5060 }
5061 else
5062 /* This is a global offset table entry for a local symbol. */
5063 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5064 rel->r_addend, tls_type))
5065 return FALSE;
5066 break;
5067
5068 case R_PPC64_PLT16_HA:
5069 case R_PPC64_PLT16_HI:
5070 case R_PPC64_PLT16_LO:
5071 case R_PPC64_PLT32:
5072 case R_PPC64_PLT64:
5073 /* This symbol requires a procedure linkage table entry. We
5074 actually build the entry in adjust_dynamic_symbol,
5075 because this might be a case of linking PIC code without
5076 linking in any dynamic objects, in which case we don't
5077 need to generate a procedure linkage table after all. */
5078 if (h == NULL)
5079 {
5080 /* It does not make sense to have a procedure linkage
5081 table entry for a local symbol. */
5082 bfd_set_error (bfd_error_bad_value);
5083 return FALSE;
5084 }
5085 else
5086 {
5087 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5088 return FALSE;
5089 h->needs_plt = 1;
5090 if (h->root.root.string[0] == '.'
5091 && h->root.root.string[1] != '\0')
5092 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5093 }
5094 break;
5095
5096 /* The following relocations don't need to propagate the
5097 relocation if linking a shared object since they are
5098 section relative. */
5099 case R_PPC64_SECTOFF:
5100 case R_PPC64_SECTOFF_LO:
5101 case R_PPC64_SECTOFF_HI:
5102 case R_PPC64_SECTOFF_HA:
5103 case R_PPC64_SECTOFF_DS:
5104 case R_PPC64_SECTOFF_LO_DS:
5105 case R_PPC64_DTPREL16:
5106 case R_PPC64_DTPREL16_LO:
5107 case R_PPC64_DTPREL16_HI:
5108 case R_PPC64_DTPREL16_HA:
5109 case R_PPC64_DTPREL16_DS:
5110 case R_PPC64_DTPREL16_LO_DS:
5111 case R_PPC64_DTPREL16_HIGHER:
5112 case R_PPC64_DTPREL16_HIGHERA:
5113 case R_PPC64_DTPREL16_HIGHEST:
5114 case R_PPC64_DTPREL16_HIGHESTA:
5115 break;
5116
5117 /* Nor do these. */
5118 case R_PPC64_REL16:
5119 case R_PPC64_REL16_LO:
5120 case R_PPC64_REL16_HI:
5121 case R_PPC64_REL16_HA:
5122 break;
5123
5124 case R_PPC64_TOC16:
5125 case R_PPC64_TOC16_DS:
5126 htab->do_multi_toc = 1;
5127 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5128 case R_PPC64_TOC16_LO:
5129 case R_PPC64_TOC16_HI:
5130 case R_PPC64_TOC16_HA:
5131 case R_PPC64_TOC16_LO_DS:
5132 sec->has_toc_reloc = 1;
5133 break;
5134
5135 /* This relocation describes the C++ object vtable hierarchy.
5136 Reconstruct it for later use during GC. */
5137 case R_PPC64_GNU_VTINHERIT:
5138 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5139 return FALSE;
5140 break;
5141
5142 /* This relocation describes which C++ vtable entries are actually
5143 used. Record for later use during GC. */
5144 case R_PPC64_GNU_VTENTRY:
5145 BFD_ASSERT (h != NULL);
5146 if (h != NULL
5147 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5148 return FALSE;
5149 break;
5150
5151 case R_PPC64_REL14:
5152 case R_PPC64_REL14_BRTAKEN:
5153 case R_PPC64_REL14_BRNTAKEN:
5154 {
5155 asection *dest = NULL;
5156
5157 /* Heuristic: If jumping outside our section, chances are
5158 we are going to need a stub. */
5159 if (h != NULL)
5160 {
5161 /* If the sym is weak it may be overridden later, so
5162 don't assume we know where a weak sym lives. */
5163 if (h->root.type == bfd_link_hash_defined)
5164 dest = h->root.u.def.section;
5165 }
5166 else
5167 {
5168 Elf_Internal_Sym *isym;
5169
5170 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5171 abfd, r_symndx);
5172 if (isym == NULL)
5173 return FALSE;
5174
5175 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5176 }
5177
5178 if (dest != sec)
5179 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5180 }
5181 /* Fall through. */
5182
5183 case R_PPC64_REL24:
5184 if (h != NULL && ifunc == NULL)
5185 {
5186 /* We may need a .plt entry if the function this reloc
5187 refers to is in a shared lib. */
5188 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5189 return FALSE;
5190 h->needs_plt = 1;
5191 if (h->root.root.string[0] == '.'
5192 && h->root.root.string[1] != '\0')
5193 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5194 if (h == tga || h == dottga)
5195 sec->has_tls_reloc = 1;
5196 }
5197 break;
5198
5199 case R_PPC64_TPREL64:
5200 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5201 if (!info->executable)
5202 info->flags |= DF_STATIC_TLS;
5203 goto dotlstoc;
5204
5205 case R_PPC64_DTPMOD64:
5206 if (rel + 1 < rel_end
5207 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5208 && rel[1].r_offset == rel->r_offset + 8)
5209 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5210 else
5211 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5212 goto dotlstoc;
5213
5214 case R_PPC64_DTPREL64:
5215 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5216 if (rel != relocs
5217 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5218 && rel[-1].r_offset == rel->r_offset - 8)
5219 /* This is the second reloc of a dtpmod, dtprel pair.
5220 Don't mark with TLS_DTPREL. */
5221 goto dodyn;
5222
5223 dotlstoc:
5224 sec->has_tls_reloc = 1;
5225 if (h != NULL)
5226 {
5227 struct ppc_link_hash_entry *eh;
5228 eh = (struct ppc_link_hash_entry *) h;
5229 eh->tls_mask |= tls_type;
5230 }
5231 else
5232 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5233 rel->r_addend, tls_type))
5234 return FALSE;
5235
5236 ppc64_sec = ppc64_elf_section_data (sec);
5237 if (ppc64_sec->sec_type != sec_toc)
5238 {
5239 bfd_size_type amt;
5240
5241 /* One extra to simplify get_tls_mask. */
5242 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5243 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5244 if (ppc64_sec->u.toc.symndx == NULL)
5245 return FALSE;
5246 amt = sec->size * sizeof (bfd_vma) / 8;
5247 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5248 if (ppc64_sec->u.toc.add == NULL)
5249 return FALSE;
5250 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5251 ppc64_sec->sec_type = sec_toc;
5252 }
5253 BFD_ASSERT (rel->r_offset % 8 == 0);
5254 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5255 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5256
5257 /* Mark the second slot of a GD or LD entry.
5258 -1 to indicate GD and -2 to indicate LD. */
5259 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5260 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5261 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5262 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5263 goto dodyn;
5264
5265 case R_PPC64_TPREL16:
5266 case R_PPC64_TPREL16_LO:
5267 case R_PPC64_TPREL16_HI:
5268 case R_PPC64_TPREL16_HA:
5269 case R_PPC64_TPREL16_DS:
5270 case R_PPC64_TPREL16_LO_DS:
5271 case R_PPC64_TPREL16_HIGHER:
5272 case R_PPC64_TPREL16_HIGHERA:
5273 case R_PPC64_TPREL16_HIGHEST:
5274 case R_PPC64_TPREL16_HIGHESTA:
5275 if (info->shared)
5276 {
5277 if (!info->executable)
5278 info->flags |= DF_STATIC_TLS;
5279 goto dodyn;
5280 }
5281 break;
5282
5283 case R_PPC64_ADDR64:
5284 if (opd_sym_map != NULL
5285 && rel + 1 < rel_end
5286 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5287 {
5288 if (h != NULL)
5289 {
5290 if (h->root.root.string[0] == '.'
5291 && h->root.root.string[1] != 0
5292 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5293 ;
5294 else
5295 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5296 }
5297 else
5298 {
5299 asection *s;
5300 Elf_Internal_Sym *isym;
5301
5302 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5303 abfd, r_symndx);
5304 if (isym == NULL)
5305 return FALSE;
5306
5307 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5308 if (s != NULL && s != sec)
5309 opd_sym_map[rel->r_offset / 8] = s;
5310 }
5311 }
5312 /* Fall through. */
5313
5314 case R_PPC64_REL30:
5315 case R_PPC64_REL32:
5316 case R_PPC64_REL64:
5317 case R_PPC64_ADDR14:
5318 case R_PPC64_ADDR14_BRNTAKEN:
5319 case R_PPC64_ADDR14_BRTAKEN:
5320 case R_PPC64_ADDR16:
5321 case R_PPC64_ADDR16_DS:
5322 case R_PPC64_ADDR16_HA:
5323 case R_PPC64_ADDR16_HI:
5324 case R_PPC64_ADDR16_HIGHER:
5325 case R_PPC64_ADDR16_HIGHERA:
5326 case R_PPC64_ADDR16_HIGHEST:
5327 case R_PPC64_ADDR16_HIGHESTA:
5328 case R_PPC64_ADDR16_LO:
5329 case R_PPC64_ADDR16_LO_DS:
5330 case R_PPC64_ADDR24:
5331 case R_PPC64_ADDR32:
5332 case R_PPC64_UADDR16:
5333 case R_PPC64_UADDR32:
5334 case R_PPC64_UADDR64:
5335 case R_PPC64_TOC:
5336 if (h != NULL && !info->shared)
5337 /* We may need a copy reloc. */
5338 h->non_got_ref = 1;
5339
5340 /* Don't propagate .opd relocs. */
5341 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5342 break;
5343
5344 /* If we are creating a shared library, and this is a reloc
5345 against a global symbol, or a non PC relative reloc
5346 against a local symbol, then we need to copy the reloc
5347 into the shared library. However, if we are linking with
5348 -Bsymbolic, we do not need to copy a reloc against a
5349 global symbol which is defined in an object we are
5350 including in the link (i.e., DEF_REGULAR is set). At
5351 this point we have not seen all the input files, so it is
5352 possible that DEF_REGULAR is not set now but will be set
5353 later (it is never cleared). In case of a weak definition,
5354 DEF_REGULAR may be cleared later by a strong definition in
5355 a shared library. We account for that possibility below by
5356 storing information in the dyn_relocs field of the hash
5357 table entry. A similar situation occurs when creating
5358 shared libraries and symbol visibility changes render the
5359 symbol local.
5360
5361 If on the other hand, we are creating an executable, we
5362 may need to keep relocations for symbols satisfied by a
5363 dynamic library if we manage to avoid copy relocs for the
5364 symbol. */
5365 dodyn:
5366 if ((info->shared
5367 && (must_be_dyn_reloc (info, r_type)
5368 || (h != NULL
5369 && (! info->symbolic
5370 || h->root.type == bfd_link_hash_defweak
5371 || !h->def_regular))))
5372 || (ELIMINATE_COPY_RELOCS
5373 && !info->shared
5374 && h != NULL
5375 && (h->root.type == bfd_link_hash_defweak
5376 || !h->def_regular))
5377 || (!info->shared
5378 && ifunc != NULL))
5379 {
5380 struct ppc_dyn_relocs *p;
5381 struct ppc_dyn_relocs **head;
5382
5383 /* We must copy these reloc types into the output file.
5384 Create a reloc section in dynobj and make room for
5385 this reloc. */
5386 if (sreloc == NULL)
5387 {
5388 sreloc = _bfd_elf_make_dynamic_reloc_section
5389 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5390
5391 if (sreloc == NULL)
5392 return FALSE;
5393 }
5394
5395 /* If this is a global symbol, we count the number of
5396 relocations we need for this symbol. */
5397 if (h != NULL)
5398 {
5399 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5400 }
5401 else
5402 {
5403 /* Track dynamic relocs needed for local syms too.
5404 We really need local syms available to do this
5405 easily. Oh well. */
5406 asection *s;
5407 void *vpp;
5408 Elf_Internal_Sym *isym;
5409
5410 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5411 abfd, r_symndx);
5412 if (isym == NULL)
5413 return FALSE;
5414
5415 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5416 if (s == NULL)
5417 s = sec;
5418
5419 vpp = &elf_section_data (s)->local_dynrel;
5420 head = (struct ppc_dyn_relocs **) vpp;
5421 }
5422
5423 p = *head;
5424 if (p == NULL || p->sec != sec)
5425 {
5426 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5427 if (p == NULL)
5428 return FALSE;
5429 p->next = *head;
5430 *head = p;
5431 p->sec = sec;
5432 p->count = 0;
5433 p->pc_count = 0;
5434 }
5435
5436 p->count += 1;
5437 if (!must_be_dyn_reloc (info, r_type))
5438 p->pc_count += 1;
5439 }
5440 break;
5441
5442 default:
5443 break;
5444 }
5445 }
5446
5447 return TRUE;
5448 }
5449
5450 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5451 of the code entry point, and its section. */
5452
5453 static bfd_vma
5454 opd_entry_value (asection *opd_sec,
5455 bfd_vma offset,
5456 asection **code_sec,
5457 bfd_vma *code_off)
5458 {
5459 bfd *opd_bfd = opd_sec->owner;
5460 Elf_Internal_Rela *relocs;
5461 Elf_Internal_Rela *lo, *hi, *look;
5462 bfd_vma val;
5463
5464 /* No relocs implies we are linking a --just-symbols object. */
5465 if (opd_sec->reloc_count == 0)
5466 {
5467 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5468 return (bfd_vma) -1;
5469
5470 if (code_sec != NULL)
5471 {
5472 asection *sec, *likely = NULL;
5473 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5474 if (sec->vma <= val
5475 && (sec->flags & SEC_LOAD) != 0
5476 && (sec->flags & SEC_ALLOC) != 0)
5477 likely = sec;
5478 if (likely != NULL)
5479 {
5480 *code_sec = likely;
5481 if (code_off != NULL)
5482 *code_off = val - likely->vma;
5483 }
5484 }
5485 return val;
5486 }
5487
5488 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5489
5490 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5491 if (relocs == NULL)
5492 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5493
5494 /* Go find the opd reloc at the sym address. */
5495 lo = relocs;
5496 BFD_ASSERT (lo != NULL);
5497 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5498 val = (bfd_vma) -1;
5499 while (lo < hi)
5500 {
5501 look = lo + (hi - lo) / 2;
5502 if (look->r_offset < offset)
5503 lo = look + 1;
5504 else if (look->r_offset > offset)
5505 hi = look;
5506 else
5507 {
5508 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5509
5510 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5511 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5512 {
5513 unsigned long symndx = ELF64_R_SYM (look->r_info);
5514 asection *sec;
5515
5516 if (symndx < symtab_hdr->sh_info)
5517 {
5518 Elf_Internal_Sym *sym;
5519
5520 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5521 if (sym == NULL)
5522 {
5523 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5524 symtab_hdr->sh_info,
5525 0, NULL, NULL, NULL);
5526 if (sym == NULL)
5527 break;
5528 symtab_hdr->contents = (bfd_byte *) sym;
5529 }
5530
5531 sym += symndx;
5532 val = sym->st_value;
5533 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5534 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5535 }
5536 else
5537 {
5538 struct elf_link_hash_entry **sym_hashes;
5539 struct elf_link_hash_entry *rh;
5540
5541 sym_hashes = elf_sym_hashes (opd_bfd);
5542 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5543 rh = elf_follow_link (rh);
5544 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5545 || rh->root.type == bfd_link_hash_defweak);
5546 val = rh->root.u.def.value;
5547 sec = rh->root.u.def.section;
5548 }
5549 val += look->r_addend;
5550 if (code_off != NULL)
5551 *code_off = val;
5552 if (code_sec != NULL)
5553 *code_sec = sec;
5554 if (sec != NULL && sec->output_section != NULL)
5555 val += sec->output_section->vma + sec->output_offset;
5556 }
5557 break;
5558 }
5559 }
5560
5561 return val;
5562 }
5563
5564 /* Return true if symbol is defined in a regular object file. */
5565
5566 static bfd_boolean
5567 is_static_defined (struct elf_link_hash_entry *h)
5568 {
5569 return ((h->root.type == bfd_link_hash_defined
5570 || h->root.type == bfd_link_hash_defweak)
5571 && h->root.u.def.section != NULL
5572 && h->root.u.def.section->output_section != NULL);
5573 }
5574
5575 /* If FDH is a function descriptor symbol, return the associated code
5576 entry symbol if it is defined. Return NULL otherwise. */
5577
5578 static struct ppc_link_hash_entry *
5579 defined_code_entry (struct ppc_link_hash_entry *fdh)
5580 {
5581 if (fdh->is_func_descriptor)
5582 {
5583 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5584 if (fh->elf.root.type == bfd_link_hash_defined
5585 || fh->elf.root.type == bfd_link_hash_defweak)
5586 return fh;
5587 }
5588 return NULL;
5589 }
5590
5591 /* If FH is a function code entry symbol, return the associated
5592 function descriptor symbol if it is defined. Return NULL otherwise. */
5593
5594 static struct ppc_link_hash_entry *
5595 defined_func_desc (struct ppc_link_hash_entry *fh)
5596 {
5597 if (fh->oh != NULL
5598 && fh->oh->is_func_descriptor)
5599 {
5600 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5601 if (fdh->elf.root.type == bfd_link_hash_defined
5602 || fdh->elf.root.type == bfd_link_hash_defweak)
5603 return fdh;
5604 }
5605 return NULL;
5606 }
5607
5608 /* Mark all our entry sym sections, both opd and code section. */
5609
5610 static void
5611 ppc64_elf_gc_keep (struct bfd_link_info *info)
5612 {
5613 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5614 struct bfd_sym_chain *sym;
5615
5616 if (htab == NULL)
5617 return;
5618
5619 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5620 {
5621 struct ppc_link_hash_entry *eh, *fh;
5622 asection *sec;
5623
5624 eh = (struct ppc_link_hash_entry *)
5625 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5626 if (eh == NULL)
5627 continue;
5628 if (eh->elf.root.type != bfd_link_hash_defined
5629 && eh->elf.root.type != bfd_link_hash_defweak)
5630 continue;
5631
5632 fh = defined_code_entry (eh);
5633 if (fh != NULL)
5634 {
5635 sec = fh->elf.root.u.def.section;
5636 sec->flags |= SEC_KEEP;
5637 }
5638 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5639 && opd_entry_value (eh->elf.root.u.def.section,
5640 eh->elf.root.u.def.value,
5641 &sec, NULL) != (bfd_vma) -1)
5642 sec->flags |= SEC_KEEP;
5643
5644 sec = eh->elf.root.u.def.section;
5645 sec->flags |= SEC_KEEP;
5646 }
5647 }
5648
5649 /* Mark sections containing dynamically referenced symbols. When
5650 building shared libraries, we must assume that any visible symbol is
5651 referenced. */
5652
5653 static bfd_boolean
5654 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5655 {
5656 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5657 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5658 struct ppc_link_hash_entry *fdh;
5659
5660 if (eh->elf.root.type == bfd_link_hash_warning)
5661 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5662
5663 /* Dynamic linking info is on the func descriptor sym. */
5664 fdh = defined_func_desc (eh);
5665 if (fdh != NULL)
5666 eh = fdh;
5667
5668 if ((eh->elf.root.type == bfd_link_hash_defined
5669 || eh->elf.root.type == bfd_link_hash_defweak)
5670 && (eh->elf.ref_dynamic
5671 || (!info->executable
5672 && eh->elf.def_regular
5673 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5674 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5675 {
5676 asection *code_sec;
5677 struct ppc_link_hash_entry *fh;
5678
5679 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5680
5681 /* Function descriptor syms cause the associated
5682 function code sym section to be marked. */
5683 fh = defined_code_entry (eh);
5684 if (fh != NULL)
5685 {
5686 code_sec = fh->elf.root.u.def.section;
5687 code_sec->flags |= SEC_KEEP;
5688 }
5689 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5690 && opd_entry_value (eh->elf.root.u.def.section,
5691 eh->elf.root.u.def.value,
5692 &code_sec, NULL) != (bfd_vma) -1)
5693 code_sec->flags |= SEC_KEEP;
5694 }
5695
5696 return TRUE;
5697 }
5698
5699 /* Return the section that should be marked against GC for a given
5700 relocation. */
5701
5702 static asection *
5703 ppc64_elf_gc_mark_hook (asection *sec,
5704 struct bfd_link_info *info,
5705 Elf_Internal_Rela *rel,
5706 struct elf_link_hash_entry *h,
5707 Elf_Internal_Sym *sym)
5708 {
5709 asection *rsec;
5710
5711 /* Syms return NULL if we're marking .opd, so we avoid marking all
5712 function sections, as all functions are referenced in .opd. */
5713 rsec = NULL;
5714 if (get_opd_info (sec) != NULL)
5715 return rsec;
5716
5717 if (h != NULL)
5718 {
5719 enum elf_ppc64_reloc_type r_type;
5720 struct ppc_link_hash_entry *eh, *fh, *fdh;
5721
5722 r_type = ELF64_R_TYPE (rel->r_info);
5723 switch (r_type)
5724 {
5725 case R_PPC64_GNU_VTINHERIT:
5726 case R_PPC64_GNU_VTENTRY:
5727 break;
5728
5729 default:
5730 switch (h->root.type)
5731 {
5732 case bfd_link_hash_defined:
5733 case bfd_link_hash_defweak:
5734 eh = (struct ppc_link_hash_entry *) h;
5735 fdh = defined_func_desc (eh);
5736 if (fdh != NULL)
5737 eh = fdh;
5738
5739 /* Function descriptor syms cause the associated
5740 function code sym section to be marked. */
5741 fh = defined_code_entry (eh);
5742 if (fh != NULL)
5743 {
5744 /* They also mark their opd section. */
5745 eh->elf.root.u.def.section->gc_mark = 1;
5746
5747 rsec = fh->elf.root.u.def.section;
5748 }
5749 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5750 && opd_entry_value (eh->elf.root.u.def.section,
5751 eh->elf.root.u.def.value,
5752 &rsec, NULL) != (bfd_vma) -1)
5753 eh->elf.root.u.def.section->gc_mark = 1;
5754 else
5755 rsec = h->root.u.def.section;
5756 break;
5757
5758 case bfd_link_hash_common:
5759 rsec = h->root.u.c.p->section;
5760 break;
5761
5762 default:
5763 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5764 }
5765 }
5766 }
5767 else
5768 {
5769 struct _opd_sec_data *opd;
5770
5771 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5772 opd = get_opd_info (rsec);
5773 if (opd != NULL && opd->func_sec != NULL)
5774 {
5775 rsec->gc_mark = 1;
5776
5777 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5778 }
5779 }
5780
5781 return rsec;
5782 }
5783
5784 /* Update the .got, .plt. and dynamic reloc reference counts for the
5785 section being removed. */
5786
5787 static bfd_boolean
5788 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5789 asection *sec, const Elf_Internal_Rela *relocs)
5790 {
5791 struct ppc_link_hash_table *htab;
5792 Elf_Internal_Shdr *symtab_hdr;
5793 struct elf_link_hash_entry **sym_hashes;
5794 struct got_entry **local_got_ents;
5795 const Elf_Internal_Rela *rel, *relend;
5796
5797 if (info->relocatable)
5798 return TRUE;
5799
5800 if ((sec->flags & SEC_ALLOC) == 0)
5801 return TRUE;
5802
5803 elf_section_data (sec)->local_dynrel = NULL;
5804
5805 htab = ppc_hash_table (info);
5806 if (htab == NULL)
5807 return FALSE;
5808
5809 symtab_hdr = &elf_symtab_hdr (abfd);
5810 sym_hashes = elf_sym_hashes (abfd);
5811 local_got_ents = elf_local_got_ents (abfd);
5812
5813 relend = relocs + sec->reloc_count;
5814 for (rel = relocs; rel < relend; rel++)
5815 {
5816 unsigned long r_symndx;
5817 enum elf_ppc64_reloc_type r_type;
5818 struct elf_link_hash_entry *h = NULL;
5819 unsigned char tls_type = 0;
5820
5821 r_symndx = ELF64_R_SYM (rel->r_info);
5822 r_type = ELF64_R_TYPE (rel->r_info);
5823 if (r_symndx >= symtab_hdr->sh_info)
5824 {
5825 struct ppc_link_hash_entry *eh;
5826 struct ppc_dyn_relocs **pp;
5827 struct ppc_dyn_relocs *p;
5828
5829 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5830 h = elf_follow_link (h);
5831 eh = (struct ppc_link_hash_entry *) h;
5832
5833 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5834 if (p->sec == sec)
5835 {
5836 /* Everything must go for SEC. */
5837 *pp = p->next;
5838 break;
5839 }
5840 }
5841
5842 if (is_branch_reloc (r_type))
5843 {
5844 struct plt_entry **ifunc = NULL;
5845 if (h != NULL)
5846 {
5847 if (h->type == STT_GNU_IFUNC)
5848 ifunc = &h->plt.plist;
5849 }
5850 else if (local_got_ents != NULL)
5851 {
5852 struct plt_entry **local_plt = (struct plt_entry **)
5853 (local_got_ents + symtab_hdr->sh_info);
5854 unsigned char *local_got_tls_masks = (unsigned char *)
5855 (local_plt + symtab_hdr->sh_info);
5856 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5857 ifunc = local_plt + r_symndx;
5858 }
5859 if (ifunc != NULL)
5860 {
5861 struct plt_entry *ent;
5862
5863 for (ent = *ifunc; ent != NULL; ent = ent->next)
5864 if (ent->addend == rel->r_addend)
5865 break;
5866 if (ent == NULL)
5867 abort ();
5868 if (ent->plt.refcount > 0)
5869 ent->plt.refcount -= 1;
5870 continue;
5871 }
5872 }
5873
5874 switch (r_type)
5875 {
5876 case R_PPC64_GOT_TLSLD16:
5877 case R_PPC64_GOT_TLSLD16_LO:
5878 case R_PPC64_GOT_TLSLD16_HI:
5879 case R_PPC64_GOT_TLSLD16_HA:
5880 tls_type = TLS_TLS | TLS_LD;
5881 goto dogot;
5882
5883 case R_PPC64_GOT_TLSGD16:
5884 case R_PPC64_GOT_TLSGD16_LO:
5885 case R_PPC64_GOT_TLSGD16_HI:
5886 case R_PPC64_GOT_TLSGD16_HA:
5887 tls_type = TLS_TLS | TLS_GD;
5888 goto dogot;
5889
5890 case R_PPC64_GOT_TPREL16_DS:
5891 case R_PPC64_GOT_TPREL16_LO_DS:
5892 case R_PPC64_GOT_TPREL16_HI:
5893 case R_PPC64_GOT_TPREL16_HA:
5894 tls_type = TLS_TLS | TLS_TPREL;
5895 goto dogot;
5896
5897 case R_PPC64_GOT_DTPREL16_DS:
5898 case R_PPC64_GOT_DTPREL16_LO_DS:
5899 case R_PPC64_GOT_DTPREL16_HI:
5900 case R_PPC64_GOT_DTPREL16_HA:
5901 tls_type = TLS_TLS | TLS_DTPREL;
5902 goto dogot;
5903
5904 case R_PPC64_GOT16:
5905 case R_PPC64_GOT16_DS:
5906 case R_PPC64_GOT16_HA:
5907 case R_PPC64_GOT16_HI:
5908 case R_PPC64_GOT16_LO:
5909 case R_PPC64_GOT16_LO_DS:
5910 dogot:
5911 {
5912 struct got_entry *ent;
5913
5914 if (h != NULL)
5915 ent = h->got.glist;
5916 else
5917 ent = local_got_ents[r_symndx];
5918
5919 for (; ent != NULL; ent = ent->next)
5920 if (ent->addend == rel->r_addend
5921 && ent->owner == abfd
5922 && ent->tls_type == tls_type)
5923 break;
5924 if (ent == NULL)
5925 abort ();
5926 if (ent->got.refcount > 0)
5927 ent->got.refcount -= 1;
5928 }
5929 break;
5930
5931 case R_PPC64_PLT16_HA:
5932 case R_PPC64_PLT16_HI:
5933 case R_PPC64_PLT16_LO:
5934 case R_PPC64_PLT32:
5935 case R_PPC64_PLT64:
5936 case R_PPC64_REL14:
5937 case R_PPC64_REL14_BRNTAKEN:
5938 case R_PPC64_REL14_BRTAKEN:
5939 case R_PPC64_REL24:
5940 if (h != NULL)
5941 {
5942 struct plt_entry *ent;
5943
5944 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5945 if (ent->addend == rel->r_addend)
5946 break;
5947 if (ent != NULL && ent->plt.refcount > 0)
5948 ent->plt.refcount -= 1;
5949 }
5950 break;
5951
5952 default:
5953 break;
5954 }
5955 }
5956 return TRUE;
5957 }
5958
5959 /* The maximum size of .sfpr. */
5960 #define SFPR_MAX (218*4)
5961
5962 struct sfpr_def_parms
5963 {
5964 const char name[12];
5965 unsigned char lo, hi;
5966 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5967 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5968 };
5969
5970 /* Auto-generate _save*, _rest* functions in .sfpr. */
5971
5972 static bfd_boolean
5973 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5974 {
5975 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5976 unsigned int i;
5977 size_t len = strlen (parm->name);
5978 bfd_boolean writing = FALSE;
5979 char sym[16];
5980
5981 if (htab == NULL)
5982 return FALSE;
5983
5984 memcpy (sym, parm->name, len);
5985 sym[len + 2] = 0;
5986
5987 for (i = parm->lo; i <= parm->hi; i++)
5988 {
5989 struct elf_link_hash_entry *h;
5990
5991 sym[len + 0] = i / 10 + '0';
5992 sym[len + 1] = i % 10 + '0';
5993 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5994 if (h != NULL
5995 && !h->def_regular)
5996 {
5997 h->root.type = bfd_link_hash_defined;
5998 h->root.u.def.section = htab->sfpr;
5999 h->root.u.def.value = htab->sfpr->size;
6000 h->type = STT_FUNC;
6001 h->def_regular = 1;
6002 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6003 writing = TRUE;
6004 if (htab->sfpr->contents == NULL)
6005 {
6006 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6007 if (htab->sfpr->contents == NULL)
6008 return FALSE;
6009 }
6010 }
6011 if (writing)
6012 {
6013 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6014 if (i != parm->hi)
6015 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6016 else
6017 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6018 htab->sfpr->size = p - htab->sfpr->contents;
6019 }
6020 }
6021
6022 return TRUE;
6023 }
6024
6025 static bfd_byte *
6026 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6027 {
6028 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6029 return p + 4;
6030 }
6031
6032 static bfd_byte *
6033 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6034 {
6035 p = savegpr0 (abfd, p, r);
6036 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6037 p = p + 4;
6038 bfd_put_32 (abfd, BLR, p);
6039 return p + 4;
6040 }
6041
6042 static bfd_byte *
6043 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6044 {
6045 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6046 return p + 4;
6047 }
6048
6049 static bfd_byte *
6050 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6051 {
6052 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6053 p = p + 4;
6054 p = restgpr0 (abfd, p, r);
6055 bfd_put_32 (abfd, MTLR_R0, p);
6056 p = p + 4;
6057 if (r == 29)
6058 {
6059 p = restgpr0 (abfd, p, 30);
6060 p = restgpr0 (abfd, p, 31);
6061 }
6062 bfd_put_32 (abfd, BLR, p);
6063 return p + 4;
6064 }
6065
6066 static bfd_byte *
6067 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6068 {
6069 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6070 return p + 4;
6071 }
6072
6073 static bfd_byte *
6074 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6075 {
6076 p = savegpr1 (abfd, p, r);
6077 bfd_put_32 (abfd, BLR, p);
6078 return p + 4;
6079 }
6080
6081 static bfd_byte *
6082 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6083 {
6084 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6085 return p + 4;
6086 }
6087
6088 static bfd_byte *
6089 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6090 {
6091 p = restgpr1 (abfd, p, r);
6092 bfd_put_32 (abfd, BLR, p);
6093 return p + 4;
6094 }
6095
6096 static bfd_byte *
6097 savefpr (bfd *abfd, bfd_byte *p, int r)
6098 {
6099 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6100 return p + 4;
6101 }
6102
6103 static bfd_byte *
6104 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6105 {
6106 p = savefpr (abfd, p, r);
6107 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6108 p = p + 4;
6109 bfd_put_32 (abfd, BLR, p);
6110 return p + 4;
6111 }
6112
6113 static bfd_byte *
6114 restfpr (bfd *abfd, bfd_byte *p, int r)
6115 {
6116 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6117 return p + 4;
6118 }
6119
6120 static bfd_byte *
6121 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6122 {
6123 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6124 p = p + 4;
6125 p = restfpr (abfd, p, r);
6126 bfd_put_32 (abfd, MTLR_R0, p);
6127 p = p + 4;
6128 if (r == 29)
6129 {
6130 p = restfpr (abfd, p, 30);
6131 p = restfpr (abfd, p, 31);
6132 }
6133 bfd_put_32 (abfd, BLR, p);
6134 return p + 4;
6135 }
6136
6137 static bfd_byte *
6138 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6139 {
6140 p = savefpr (abfd, p, r);
6141 bfd_put_32 (abfd, BLR, p);
6142 return p + 4;
6143 }
6144
6145 static bfd_byte *
6146 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6147 {
6148 p = restfpr (abfd, p, r);
6149 bfd_put_32 (abfd, BLR, p);
6150 return p + 4;
6151 }
6152
6153 static bfd_byte *
6154 savevr (bfd *abfd, bfd_byte *p, int r)
6155 {
6156 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6157 p = p + 4;
6158 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6159 return p + 4;
6160 }
6161
6162 static bfd_byte *
6163 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6164 {
6165 p = savevr (abfd, p, r);
6166 bfd_put_32 (abfd, BLR, p);
6167 return p + 4;
6168 }
6169
6170 static bfd_byte *
6171 restvr (bfd *abfd, bfd_byte *p, int r)
6172 {
6173 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6174 p = p + 4;
6175 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6176 return p + 4;
6177 }
6178
6179 static bfd_byte *
6180 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6181 {
6182 p = restvr (abfd, p, r);
6183 bfd_put_32 (abfd, BLR, p);
6184 return p + 4;
6185 }
6186
6187 /* Called via elf_link_hash_traverse to transfer dynamic linking
6188 information on function code symbol entries to their corresponding
6189 function descriptor symbol entries. */
6190
6191 static bfd_boolean
6192 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6193 {
6194 struct bfd_link_info *info;
6195 struct ppc_link_hash_table *htab;
6196 struct plt_entry *ent;
6197 struct ppc_link_hash_entry *fh;
6198 struct ppc_link_hash_entry *fdh;
6199 bfd_boolean force_local;
6200
6201 fh = (struct ppc_link_hash_entry *) h;
6202 if (fh->elf.root.type == bfd_link_hash_indirect)
6203 return TRUE;
6204
6205 if (fh->elf.root.type == bfd_link_hash_warning)
6206 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6207
6208 info = inf;
6209 htab = ppc_hash_table (info);
6210 if (htab == NULL)
6211 return FALSE;
6212
6213 /* Resolve undefined references to dot-symbols as the value
6214 in the function descriptor, if we have one in a regular object.
6215 This is to satisfy cases like ".quad .foo". Calls to functions
6216 in dynamic objects are handled elsewhere. */
6217 if (fh->elf.root.type == bfd_link_hash_undefweak
6218 && fh->was_undefined
6219 && (fdh = defined_func_desc (fh)) != NULL
6220 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6221 && opd_entry_value (fdh->elf.root.u.def.section,
6222 fdh->elf.root.u.def.value,
6223 &fh->elf.root.u.def.section,
6224 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6225 {
6226 fh->elf.root.type = fdh->elf.root.type;
6227 fh->elf.forced_local = 1;
6228 fh->elf.def_regular = fdh->elf.def_regular;
6229 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6230 }
6231
6232 /* If this is a function code symbol, transfer dynamic linking
6233 information to the function descriptor symbol. */
6234 if (!fh->is_func)
6235 return TRUE;
6236
6237 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6238 if (ent->plt.refcount > 0)
6239 break;
6240 if (ent == NULL
6241 || fh->elf.root.root.string[0] != '.'
6242 || fh->elf.root.root.string[1] == '\0')
6243 return TRUE;
6244
6245 /* Find the corresponding function descriptor symbol. Create it
6246 as undefined if necessary. */
6247
6248 fdh = lookup_fdh (fh, htab);
6249 if (fdh == NULL
6250 && !info->executable
6251 && (fh->elf.root.type == bfd_link_hash_undefined
6252 || fh->elf.root.type == bfd_link_hash_undefweak))
6253 {
6254 fdh = make_fdh (info, fh);
6255 if (fdh == NULL)
6256 return FALSE;
6257 }
6258
6259 /* Fake function descriptors are made undefweak. If the function
6260 code symbol is strong undefined, make the fake sym the same.
6261 If the function code symbol is defined, then force the fake
6262 descriptor local; We can't support overriding of symbols in a
6263 shared library on a fake descriptor. */
6264
6265 if (fdh != NULL
6266 && fdh->fake
6267 && fdh->elf.root.type == bfd_link_hash_undefweak)
6268 {
6269 if (fh->elf.root.type == bfd_link_hash_undefined)
6270 {
6271 fdh->elf.root.type = bfd_link_hash_undefined;
6272 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6273 }
6274 else if (fh->elf.root.type == bfd_link_hash_defined
6275 || fh->elf.root.type == bfd_link_hash_defweak)
6276 {
6277 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6278 }
6279 }
6280
6281 if (fdh != NULL
6282 && !fdh->elf.forced_local
6283 && (!info->executable
6284 || fdh->elf.def_dynamic
6285 || fdh->elf.ref_dynamic
6286 || (fdh->elf.root.type == bfd_link_hash_undefweak
6287 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6288 {
6289 if (fdh->elf.dynindx == -1)
6290 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6291 return FALSE;
6292 fdh->elf.ref_regular |= fh->elf.ref_regular;
6293 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6294 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6295 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6296 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6297 {
6298 move_plt_plist (fh, fdh);
6299 fdh->elf.needs_plt = 1;
6300 }
6301 fdh->is_func_descriptor = 1;
6302 fdh->oh = fh;
6303 fh->oh = fdh;
6304 }
6305
6306 /* Now that the info is on the function descriptor, clear the
6307 function code sym info. Any function code syms for which we
6308 don't have a definition in a regular file, we force local.
6309 This prevents a shared library from exporting syms that have
6310 been imported from another library. Function code syms that
6311 are really in the library we must leave global to prevent the
6312 linker dragging in a definition from a static library. */
6313 force_local = (!fh->elf.def_regular
6314 || fdh == NULL
6315 || !fdh->elf.def_regular
6316 || fdh->elf.forced_local);
6317 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6318
6319 return TRUE;
6320 }
6321
6322 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6323 this hook to a) provide some gcc support functions, and b) transfer
6324 dynamic linking information gathered so far on function code symbol
6325 entries, to their corresponding function descriptor symbol entries. */
6326
6327 static bfd_boolean
6328 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6329 struct bfd_link_info *info)
6330 {
6331 struct ppc_link_hash_table *htab;
6332 unsigned int i;
6333 const struct sfpr_def_parms funcs[] =
6334 {
6335 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6336 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6337 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6338 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6339 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6340 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6341 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6342 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6343 { "._savef", 14, 31, savefpr, savefpr1_tail },
6344 { "._restf", 14, 31, restfpr, restfpr1_tail },
6345 { "_savevr_", 20, 31, savevr, savevr_tail },
6346 { "_restvr_", 20, 31, restvr, restvr_tail }
6347 };
6348
6349 htab = ppc_hash_table (info);
6350 if (htab == NULL)
6351 return FALSE;
6352
6353 if (htab->sfpr == NULL)
6354 /* We don't have any relocs. */
6355 return TRUE;
6356
6357 /* Provide any missing _save* and _rest* functions. */
6358 htab->sfpr->size = 0;
6359 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6360 if (!sfpr_define (info, &funcs[i]))
6361 return FALSE;
6362
6363 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6364
6365 if (htab->sfpr->size == 0)
6366 htab->sfpr->flags |= SEC_EXCLUDE;
6367
6368 return TRUE;
6369 }
6370
6371 /* Adjust a symbol defined by a dynamic object and referenced by a
6372 regular object. The current definition is in some section of the
6373 dynamic object, but we're not including those sections. We have to
6374 change the definition to something the rest of the link can
6375 understand. */
6376
6377 static bfd_boolean
6378 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6379 struct elf_link_hash_entry *h)
6380 {
6381 struct ppc_link_hash_table *htab;
6382 asection *s;
6383
6384 htab = ppc_hash_table (info);
6385 if (htab == NULL)
6386 return FALSE;
6387
6388 /* Deal with function syms. */
6389 if (h->type == STT_FUNC
6390 || h->type == STT_GNU_IFUNC
6391 || h->needs_plt)
6392 {
6393 /* Clear procedure linkage table information for any symbol that
6394 won't need a .plt entry. */
6395 struct plt_entry *ent;
6396 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6397 if (ent->plt.refcount > 0)
6398 break;
6399 if (ent == NULL
6400 || (h->type != STT_GNU_IFUNC
6401 && (SYMBOL_CALLS_LOCAL (info, h)
6402 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6403 && h->root.type == bfd_link_hash_undefweak))))
6404 {
6405 h->plt.plist = NULL;
6406 h->needs_plt = 0;
6407 }
6408 }
6409 else
6410 h->plt.plist = NULL;
6411
6412 /* If this is a weak symbol, and there is a real definition, the
6413 processor independent code will have arranged for us to see the
6414 real definition first, and we can just use the same value. */
6415 if (h->u.weakdef != NULL)
6416 {
6417 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6418 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6419 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6420 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6421 if (ELIMINATE_COPY_RELOCS)
6422 h->non_got_ref = h->u.weakdef->non_got_ref;
6423 return TRUE;
6424 }
6425
6426 /* If we are creating a shared library, we must presume that the
6427 only references to the symbol are via the global offset table.
6428 For such cases we need not do anything here; the relocations will
6429 be handled correctly by relocate_section. */
6430 if (info->shared)
6431 return TRUE;
6432
6433 /* If there are no references to this symbol that do not use the
6434 GOT, we don't need to generate a copy reloc. */
6435 if (!h->non_got_ref)
6436 return TRUE;
6437
6438 /* Don't generate a copy reloc for symbols defined in the executable. */
6439 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6440 return TRUE;
6441
6442 if (ELIMINATE_COPY_RELOCS)
6443 {
6444 struct ppc_link_hash_entry * eh;
6445 struct ppc_dyn_relocs *p;
6446
6447 eh = (struct ppc_link_hash_entry *) h;
6448 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6449 {
6450 s = p->sec->output_section;
6451 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6452 break;
6453 }
6454
6455 /* If we didn't find any dynamic relocs in read-only sections, then
6456 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6457 if (p == NULL)
6458 {
6459 h->non_got_ref = 0;
6460 return TRUE;
6461 }
6462 }
6463
6464 if (h->plt.plist != NULL)
6465 {
6466 /* We should never get here, but unfortunately there are versions
6467 of gcc out there that improperly (for this ABI) put initialized
6468 function pointers, vtable refs and suchlike in read-only
6469 sections. Allow them to proceed, but warn that this might
6470 break at runtime. */
6471 (*_bfd_error_handler)
6472 (_("copy reloc against `%s' requires lazy plt linking; "
6473 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6474 h->root.root.string);
6475 }
6476
6477 /* This is a reference to a symbol defined by a dynamic object which
6478 is not a function. */
6479
6480 if (h->size == 0)
6481 {
6482 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6483 h->root.root.string);
6484 return TRUE;
6485 }
6486
6487 /* We must allocate the symbol in our .dynbss section, which will
6488 become part of the .bss section of the executable. There will be
6489 an entry for this symbol in the .dynsym section. The dynamic
6490 object will contain position independent code, so all references
6491 from the dynamic object to this symbol will go through the global
6492 offset table. The dynamic linker will use the .dynsym entry to
6493 determine the address it must put in the global offset table, so
6494 both the dynamic object and the regular object will refer to the
6495 same memory location for the variable. */
6496
6497 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6498 to copy the initial value out of the dynamic object and into the
6499 runtime process image. We need to remember the offset into the
6500 .rela.bss section we are going to use. */
6501 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6502 {
6503 htab->relbss->size += sizeof (Elf64_External_Rela);
6504 h->needs_copy = 1;
6505 }
6506
6507 s = htab->dynbss;
6508
6509 return _bfd_elf_adjust_dynamic_copy (h, s);
6510 }
6511
6512 /* If given a function descriptor symbol, hide both the function code
6513 sym and the descriptor. */
6514 static void
6515 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6516 struct elf_link_hash_entry *h,
6517 bfd_boolean force_local)
6518 {
6519 struct ppc_link_hash_entry *eh;
6520 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6521
6522 eh = (struct ppc_link_hash_entry *) h;
6523 if (eh->is_func_descriptor)
6524 {
6525 struct ppc_link_hash_entry *fh = eh->oh;
6526
6527 if (fh == NULL)
6528 {
6529 const char *p, *q;
6530 struct ppc_link_hash_table *htab;
6531 char save;
6532
6533 /* We aren't supposed to use alloca in BFD because on
6534 systems which do not have alloca the version in libiberty
6535 calls xmalloc, which might cause the program to crash
6536 when it runs out of memory. This function doesn't have a
6537 return status, so there's no way to gracefully return an
6538 error. So cheat. We know that string[-1] can be safely
6539 accessed; It's either a string in an ELF string table,
6540 or allocated in an objalloc structure. */
6541
6542 p = eh->elf.root.root.string - 1;
6543 save = *p;
6544 *(char *) p = '.';
6545 htab = ppc_hash_table (info);
6546 if (htab == NULL)
6547 return;
6548
6549 fh = (struct ppc_link_hash_entry *)
6550 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6551 *(char *) p = save;
6552
6553 /* Unfortunately, if it so happens that the string we were
6554 looking for was allocated immediately before this string,
6555 then we overwrote the string terminator. That's the only
6556 reason the lookup should fail. */
6557 if (fh == NULL)
6558 {
6559 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6560 while (q >= eh->elf.root.root.string && *q == *p)
6561 --q, --p;
6562 if (q < eh->elf.root.root.string && *p == '.')
6563 fh = (struct ppc_link_hash_entry *)
6564 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6565 }
6566 if (fh != NULL)
6567 {
6568 eh->oh = fh;
6569 fh->oh = eh;
6570 }
6571 }
6572 if (fh != NULL)
6573 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6574 }
6575 }
6576
6577 static bfd_boolean
6578 get_sym_h (struct elf_link_hash_entry **hp,
6579 Elf_Internal_Sym **symp,
6580 asection **symsecp,
6581 unsigned char **tls_maskp,
6582 Elf_Internal_Sym **locsymsp,
6583 unsigned long r_symndx,
6584 bfd *ibfd)
6585 {
6586 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6587
6588 if (r_symndx >= symtab_hdr->sh_info)
6589 {
6590 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6591 struct elf_link_hash_entry *h;
6592
6593 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6594 h = elf_follow_link (h);
6595
6596 if (hp != NULL)
6597 *hp = h;
6598
6599 if (symp != NULL)
6600 *symp = NULL;
6601
6602 if (symsecp != NULL)
6603 {
6604 asection *symsec = NULL;
6605 if (h->root.type == bfd_link_hash_defined
6606 || h->root.type == bfd_link_hash_defweak)
6607 symsec = h->root.u.def.section;
6608 *symsecp = symsec;
6609 }
6610
6611 if (tls_maskp != NULL)
6612 {
6613 struct ppc_link_hash_entry *eh;
6614
6615 eh = (struct ppc_link_hash_entry *) h;
6616 *tls_maskp = &eh->tls_mask;
6617 }
6618 }
6619 else
6620 {
6621 Elf_Internal_Sym *sym;
6622 Elf_Internal_Sym *locsyms = *locsymsp;
6623
6624 if (locsyms == NULL)
6625 {
6626 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6627 if (locsyms == NULL)
6628 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6629 symtab_hdr->sh_info,
6630 0, NULL, NULL, NULL);
6631 if (locsyms == NULL)
6632 return FALSE;
6633 *locsymsp = locsyms;
6634 }
6635 sym = locsyms + r_symndx;
6636
6637 if (hp != NULL)
6638 *hp = NULL;
6639
6640 if (symp != NULL)
6641 *symp = sym;
6642
6643 if (symsecp != NULL)
6644 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6645
6646 if (tls_maskp != NULL)
6647 {
6648 struct got_entry **lgot_ents;
6649 unsigned char *tls_mask;
6650
6651 tls_mask = NULL;
6652 lgot_ents = elf_local_got_ents (ibfd);
6653 if (lgot_ents != NULL)
6654 {
6655 struct plt_entry **local_plt = (struct plt_entry **)
6656 (lgot_ents + symtab_hdr->sh_info);
6657 unsigned char *lgot_masks = (unsigned char *)
6658 (local_plt + symtab_hdr->sh_info);
6659 tls_mask = &lgot_masks[r_symndx];
6660 }
6661 *tls_maskp = tls_mask;
6662 }
6663 }
6664 return TRUE;
6665 }
6666
6667 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6668 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6669 type suitable for optimization, and 1 otherwise. */
6670
6671 static int
6672 get_tls_mask (unsigned char **tls_maskp,
6673 unsigned long *toc_symndx,
6674 bfd_vma *toc_addend,
6675 Elf_Internal_Sym **locsymsp,
6676 const Elf_Internal_Rela *rel,
6677 bfd *ibfd)
6678 {
6679 unsigned long r_symndx;
6680 int next_r;
6681 struct elf_link_hash_entry *h;
6682 Elf_Internal_Sym *sym;
6683 asection *sec;
6684 bfd_vma off;
6685
6686 r_symndx = ELF64_R_SYM (rel->r_info);
6687 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6688 return 0;
6689
6690 if ((*tls_maskp != NULL && **tls_maskp != 0)
6691 || sec == NULL
6692 || ppc64_elf_section_data (sec) == NULL
6693 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6694 return 1;
6695
6696 /* Look inside a TOC section too. */
6697 if (h != NULL)
6698 {
6699 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6700 off = h->root.u.def.value;
6701 }
6702 else
6703 off = sym->st_value;
6704 off += rel->r_addend;
6705 BFD_ASSERT (off % 8 == 0);
6706 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6707 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6708 if (toc_symndx != NULL)
6709 *toc_symndx = r_symndx;
6710 if (toc_addend != NULL)
6711 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6712 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6713 return 0;
6714 if ((h == NULL || is_static_defined (h))
6715 && (next_r == -1 || next_r == -2))
6716 return 1 - next_r;
6717 return 1;
6718 }
6719
6720 /* Adjust all global syms defined in opd sections. In gcc generated
6721 code for the old ABI, these will already have been done. */
6722
6723 static bfd_boolean
6724 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6725 {
6726 struct ppc_link_hash_entry *eh;
6727 asection *sym_sec;
6728 struct _opd_sec_data *opd;
6729
6730 if (h->root.type == bfd_link_hash_indirect)
6731 return TRUE;
6732
6733 if (h->root.type == bfd_link_hash_warning)
6734 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6735
6736 if (h->root.type != bfd_link_hash_defined
6737 && h->root.type != bfd_link_hash_defweak)
6738 return TRUE;
6739
6740 eh = (struct ppc_link_hash_entry *) h;
6741 if (eh->adjust_done)
6742 return TRUE;
6743
6744 sym_sec = eh->elf.root.u.def.section;
6745 opd = get_opd_info (sym_sec);
6746 if (opd != NULL && opd->adjust != NULL)
6747 {
6748 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6749 if (adjust == -1)
6750 {
6751 /* This entry has been deleted. */
6752 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6753 if (dsec == NULL)
6754 {
6755 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6756 if (elf_discarded_section (dsec))
6757 {
6758 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6759 break;
6760 }
6761 }
6762 eh->elf.root.u.def.value = 0;
6763 eh->elf.root.u.def.section = dsec;
6764 }
6765 else
6766 eh->elf.root.u.def.value += adjust;
6767 eh->adjust_done = 1;
6768 }
6769 return TRUE;
6770 }
6771
6772 /* Handles decrementing dynamic reloc counts for the reloc specified by
6773 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6774 have already been determined. */
6775
6776 static bfd_boolean
6777 dec_dynrel_count (bfd_vma r_info,
6778 asection *sec,
6779 struct bfd_link_info *info,
6780 Elf_Internal_Sym **local_syms,
6781 struct elf_link_hash_entry *h,
6782 asection *sym_sec)
6783 {
6784 enum elf_ppc64_reloc_type r_type;
6785 struct ppc_dyn_relocs *p;
6786 struct ppc_dyn_relocs **pp;
6787
6788 /* Can this reloc be dynamic? This switch, and later tests here
6789 should be kept in sync with the code in check_relocs. */
6790 r_type = ELF64_R_TYPE (r_info);
6791 switch (r_type)
6792 {
6793 default:
6794 return TRUE;
6795
6796 case R_PPC64_TPREL16:
6797 case R_PPC64_TPREL16_LO:
6798 case R_PPC64_TPREL16_HI:
6799 case R_PPC64_TPREL16_HA:
6800 case R_PPC64_TPREL16_DS:
6801 case R_PPC64_TPREL16_LO_DS:
6802 case R_PPC64_TPREL16_HIGHER:
6803 case R_PPC64_TPREL16_HIGHERA:
6804 case R_PPC64_TPREL16_HIGHEST:
6805 case R_PPC64_TPREL16_HIGHESTA:
6806 if (!info->shared)
6807 return TRUE;
6808
6809 case R_PPC64_TPREL64:
6810 case R_PPC64_DTPMOD64:
6811 case R_PPC64_DTPREL64:
6812 case R_PPC64_ADDR64:
6813 case R_PPC64_REL30:
6814 case R_PPC64_REL32:
6815 case R_PPC64_REL64:
6816 case R_PPC64_ADDR14:
6817 case R_PPC64_ADDR14_BRNTAKEN:
6818 case R_PPC64_ADDR14_BRTAKEN:
6819 case R_PPC64_ADDR16:
6820 case R_PPC64_ADDR16_DS:
6821 case R_PPC64_ADDR16_HA:
6822 case R_PPC64_ADDR16_HI:
6823 case R_PPC64_ADDR16_HIGHER:
6824 case R_PPC64_ADDR16_HIGHERA:
6825 case R_PPC64_ADDR16_HIGHEST:
6826 case R_PPC64_ADDR16_HIGHESTA:
6827 case R_PPC64_ADDR16_LO:
6828 case R_PPC64_ADDR16_LO_DS:
6829 case R_PPC64_ADDR24:
6830 case R_PPC64_ADDR32:
6831 case R_PPC64_UADDR16:
6832 case R_PPC64_UADDR32:
6833 case R_PPC64_UADDR64:
6834 case R_PPC64_TOC:
6835 break;
6836 }
6837
6838 if (local_syms != NULL)
6839 {
6840 unsigned long r_symndx;
6841 Elf_Internal_Sym *sym;
6842 bfd *ibfd = sec->owner;
6843
6844 r_symndx = ELF64_R_SYM (r_info);
6845 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6846 return FALSE;
6847 }
6848
6849 if ((info->shared
6850 && (must_be_dyn_reloc (info, r_type)
6851 || (h != NULL
6852 && (!info->symbolic
6853 || h->root.type == bfd_link_hash_defweak
6854 || !h->def_regular))))
6855 || (ELIMINATE_COPY_RELOCS
6856 && !info->shared
6857 && h != NULL
6858 && (h->root.type == bfd_link_hash_defweak
6859 || !h->def_regular)))
6860 ;
6861 else
6862 return TRUE;
6863
6864 if (h != NULL)
6865 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6866 else
6867 {
6868 if (sym_sec != NULL)
6869 {
6870 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6871 pp = (struct ppc_dyn_relocs **) vpp;
6872 }
6873 else
6874 {
6875 void *vpp = &elf_section_data (sec)->local_dynrel;
6876 pp = (struct ppc_dyn_relocs **) vpp;
6877 }
6878
6879 /* elf_gc_sweep may have already removed all dyn relocs associated
6880 with local syms for a given section. Don't report a dynreloc
6881 miscount. */
6882 if (*pp == NULL)
6883 return TRUE;
6884 }
6885
6886 while ((p = *pp) != NULL)
6887 {
6888 if (p->sec == sec)
6889 {
6890 if (!must_be_dyn_reloc (info, r_type))
6891 p->pc_count -= 1;
6892 p->count -= 1;
6893 if (p->count == 0)
6894 *pp = p->next;
6895 return TRUE;
6896 }
6897 pp = &p->next;
6898 }
6899
6900 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6901 sec->owner, sec);
6902 bfd_set_error (bfd_error_bad_value);
6903 return FALSE;
6904 }
6905
6906 /* Remove unused Official Procedure Descriptor entries. Currently we
6907 only remove those associated with functions in discarded link-once
6908 sections, or weakly defined functions that have been overridden. It
6909 would be possible to remove many more entries for statically linked
6910 applications. */
6911
6912 bfd_boolean
6913 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6914 {
6915 bfd *ibfd;
6916 bfd_boolean some_edited = FALSE;
6917 asection *need_pad = NULL;
6918
6919 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6920 {
6921 asection *sec;
6922 Elf_Internal_Rela *relstart, *rel, *relend;
6923 Elf_Internal_Shdr *symtab_hdr;
6924 Elf_Internal_Sym *local_syms;
6925 bfd_vma offset;
6926 struct _opd_sec_data *opd;
6927 bfd_boolean need_edit, add_aux_fields;
6928 bfd_size_type cnt_16b = 0;
6929
6930 if (!is_ppc64_elf (ibfd))
6931 continue;
6932
6933 sec = bfd_get_section_by_name (ibfd, ".opd");
6934 if (sec == NULL || sec->size == 0)
6935 continue;
6936
6937 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6938 continue;
6939
6940 if (sec->output_section == bfd_abs_section_ptr)
6941 continue;
6942
6943 /* Look through the section relocs. */
6944 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6945 continue;
6946
6947 local_syms = NULL;
6948 symtab_hdr = &elf_symtab_hdr (ibfd);
6949
6950 /* Read the relocations. */
6951 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6952 info->keep_memory);
6953 if (relstart == NULL)
6954 return FALSE;
6955
6956 /* First run through the relocs to check they are sane, and to
6957 determine whether we need to edit this opd section. */
6958 need_edit = FALSE;
6959 need_pad = sec;
6960 offset = 0;
6961 relend = relstart + sec->reloc_count;
6962 for (rel = relstart; rel < relend; )
6963 {
6964 enum elf_ppc64_reloc_type r_type;
6965 unsigned long r_symndx;
6966 asection *sym_sec;
6967 struct elf_link_hash_entry *h;
6968 Elf_Internal_Sym *sym;
6969
6970 /* .opd contains a regular array of 16 or 24 byte entries. We're
6971 only interested in the reloc pointing to a function entry
6972 point. */
6973 if (rel->r_offset != offset
6974 || rel + 1 >= relend
6975 || (rel + 1)->r_offset != offset + 8)
6976 {
6977 /* If someone messes with .opd alignment then after a
6978 "ld -r" we might have padding in the middle of .opd.
6979 Also, there's nothing to prevent someone putting
6980 something silly in .opd with the assembler. No .opd
6981 optimization for them! */
6982 broken_opd:
6983 (*_bfd_error_handler)
6984 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6985 need_edit = FALSE;
6986 break;
6987 }
6988
6989 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6990 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6991 {
6992 (*_bfd_error_handler)
6993 (_("%B: unexpected reloc type %u in .opd section"),
6994 ibfd, r_type);
6995 need_edit = FALSE;
6996 break;
6997 }
6998
6999 r_symndx = ELF64_R_SYM (rel->r_info);
7000 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7001 r_symndx, ibfd))
7002 goto error_ret;
7003
7004 if (sym_sec == NULL || sym_sec->owner == NULL)
7005 {
7006 const char *sym_name;
7007 if (h != NULL)
7008 sym_name = h->root.root.string;
7009 else
7010 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7011 sym_sec);
7012
7013 (*_bfd_error_handler)
7014 (_("%B: undefined sym `%s' in .opd section"),
7015 ibfd, sym_name);
7016 need_edit = FALSE;
7017 break;
7018 }
7019
7020 /* opd entries are always for functions defined in the
7021 current input bfd. If the symbol isn't defined in the
7022 input bfd, then we won't be using the function in this
7023 bfd; It must be defined in a linkonce section in another
7024 bfd, or is weak. It's also possible that we are
7025 discarding the function due to a linker script /DISCARD/,
7026 which we test for via the output_section. */
7027 if (sym_sec->owner != ibfd
7028 || sym_sec->output_section == bfd_abs_section_ptr)
7029 need_edit = TRUE;
7030
7031 rel += 2;
7032 if (rel == relend
7033 || (rel + 1 == relend && rel->r_offset == offset + 16))
7034 {
7035 if (sec->size == offset + 24)
7036 {
7037 need_pad = NULL;
7038 break;
7039 }
7040 if (rel == relend && sec->size == offset + 16)
7041 {
7042 cnt_16b++;
7043 break;
7044 }
7045 goto broken_opd;
7046 }
7047
7048 if (rel->r_offset == offset + 24)
7049 offset += 24;
7050 else if (rel->r_offset != offset + 16)
7051 goto broken_opd;
7052 else if (rel + 1 < relend
7053 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7054 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7055 {
7056 offset += 16;
7057 cnt_16b++;
7058 }
7059 else if (rel + 2 < relend
7060 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7061 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7062 {
7063 offset += 24;
7064 rel += 1;
7065 }
7066 else
7067 goto broken_opd;
7068 }
7069
7070 add_aux_fields = non_overlapping && cnt_16b > 0;
7071
7072 if (need_edit || add_aux_fields)
7073 {
7074 Elf_Internal_Rela *write_rel;
7075 bfd_byte *rptr, *wptr;
7076 bfd_byte *new_contents;
7077 bfd_boolean skip;
7078 long opd_ent_size;
7079 bfd_size_type amt;
7080
7081 new_contents = NULL;
7082 amt = sec->size * sizeof (long) / 8;
7083 opd = &ppc64_elf_section_data (sec)->u.opd;
7084 opd->adjust = bfd_zalloc (sec->owner, amt);
7085 if (opd->adjust == NULL)
7086 return FALSE;
7087 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7088
7089 /* This seems a waste of time as input .opd sections are all
7090 zeros as generated by gcc, but I suppose there's no reason
7091 this will always be so. We might start putting something in
7092 the third word of .opd entries. */
7093 if ((sec->flags & SEC_IN_MEMORY) == 0)
7094 {
7095 bfd_byte *loc;
7096 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7097 {
7098 if (loc != NULL)
7099 free (loc);
7100 error_ret:
7101 if (local_syms != NULL
7102 && symtab_hdr->contents != (unsigned char *) local_syms)
7103 free (local_syms);
7104 if (elf_section_data (sec)->relocs != relstart)
7105 free (relstart);
7106 return FALSE;
7107 }
7108 sec->contents = loc;
7109 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7110 }
7111
7112 elf_section_data (sec)->relocs = relstart;
7113
7114 new_contents = sec->contents;
7115 if (add_aux_fields)
7116 {
7117 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7118 if (new_contents == NULL)
7119 return FALSE;
7120 need_pad = FALSE;
7121 }
7122 wptr = new_contents;
7123 rptr = sec->contents;
7124
7125 write_rel = relstart;
7126 skip = FALSE;
7127 offset = 0;
7128 opd_ent_size = 0;
7129 for (rel = relstart; rel < relend; rel++)
7130 {
7131 unsigned long r_symndx;
7132 asection *sym_sec;
7133 struct elf_link_hash_entry *h;
7134 Elf_Internal_Sym *sym;
7135
7136 r_symndx = ELF64_R_SYM (rel->r_info);
7137 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7138 r_symndx, ibfd))
7139 goto error_ret;
7140
7141 if (rel->r_offset == offset)
7142 {
7143 struct ppc_link_hash_entry *fdh = NULL;
7144
7145 /* See if the .opd entry is full 24 byte or
7146 16 byte (with fd_aux entry overlapped with next
7147 fd_func). */
7148 opd_ent_size = 24;
7149 if ((rel + 2 == relend && sec->size == offset + 16)
7150 || (rel + 3 < relend
7151 && rel[2].r_offset == offset + 16
7152 && rel[3].r_offset == offset + 24
7153 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7154 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7155 opd_ent_size = 16;
7156
7157 if (h != NULL
7158 && h->root.root.string[0] == '.')
7159 {
7160 struct ppc_link_hash_table *htab;
7161
7162 htab = ppc_hash_table (info);
7163 if (htab != NULL)
7164 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7165 htab);
7166 if (fdh != NULL
7167 && fdh->elf.root.type != bfd_link_hash_defined
7168 && fdh->elf.root.type != bfd_link_hash_defweak)
7169 fdh = NULL;
7170 }
7171
7172 skip = (sym_sec->owner != ibfd
7173 || sym_sec->output_section == bfd_abs_section_ptr);
7174 if (skip)
7175 {
7176 if (fdh != NULL && sym_sec->owner == ibfd)
7177 {
7178 /* Arrange for the function descriptor sym
7179 to be dropped. */
7180 fdh->elf.root.u.def.value = 0;
7181 fdh->elf.root.u.def.section = sym_sec;
7182 }
7183 opd->adjust[rel->r_offset / 8] = -1;
7184 }
7185 else
7186 {
7187 /* We'll be keeping this opd entry. */
7188
7189 if (fdh != NULL)
7190 {
7191 /* Redefine the function descriptor symbol to
7192 this location in the opd section. It is
7193 necessary to update the value here rather
7194 than using an array of adjustments as we do
7195 for local symbols, because various places
7196 in the generic ELF code use the value
7197 stored in u.def.value. */
7198 fdh->elf.root.u.def.value = wptr - new_contents;
7199 fdh->adjust_done = 1;
7200 }
7201
7202 /* Local syms are a bit tricky. We could
7203 tweak them as they can be cached, but
7204 we'd need to look through the local syms
7205 for the function descriptor sym which we
7206 don't have at the moment. So keep an
7207 array of adjustments. */
7208 opd->adjust[rel->r_offset / 8]
7209 = (wptr - new_contents) - (rptr - sec->contents);
7210
7211 if (wptr != rptr)
7212 memcpy (wptr, rptr, opd_ent_size);
7213 wptr += opd_ent_size;
7214 if (add_aux_fields && opd_ent_size == 16)
7215 {
7216 memset (wptr, '\0', 8);
7217 wptr += 8;
7218 }
7219 }
7220 rptr += opd_ent_size;
7221 offset += opd_ent_size;
7222 }
7223
7224 if (skip)
7225 {
7226 if (!NO_OPD_RELOCS
7227 && !info->relocatable
7228 && !dec_dynrel_count (rel->r_info, sec, info,
7229 NULL, h, sym_sec))
7230 goto error_ret;
7231 }
7232 else
7233 {
7234 /* We need to adjust any reloc offsets to point to the
7235 new opd entries. While we're at it, we may as well
7236 remove redundant relocs. */
7237 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7238 if (write_rel != rel)
7239 memcpy (write_rel, rel, sizeof (*rel));
7240 ++write_rel;
7241 }
7242 }
7243
7244 sec->size = wptr - new_contents;
7245 sec->reloc_count = write_rel - relstart;
7246 if (add_aux_fields)
7247 {
7248 free (sec->contents);
7249 sec->contents = new_contents;
7250 }
7251
7252 /* Fudge the header size too, as this is used later in
7253 elf_bfd_final_link if we are emitting relocs. */
7254 elf_section_data (sec)->rel_hdr.sh_size
7255 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7256 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7257 some_edited = TRUE;
7258 }
7259 else if (elf_section_data (sec)->relocs != relstart)
7260 free (relstart);
7261
7262 if (local_syms != NULL
7263 && symtab_hdr->contents != (unsigned char *) local_syms)
7264 {
7265 if (!info->keep_memory)
7266 free (local_syms);
7267 else
7268 symtab_hdr->contents = (unsigned char *) local_syms;
7269 }
7270 }
7271
7272 if (some_edited)
7273 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7274
7275 /* If we are doing a final link and the last .opd entry is just 16 byte
7276 long, add a 8 byte padding after it. */
7277 if (need_pad != NULL && !info->relocatable)
7278 {
7279 bfd_byte *p;
7280
7281 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7282 {
7283 BFD_ASSERT (need_pad->size > 0);
7284
7285 p = bfd_malloc (need_pad->size + 8);
7286 if (p == NULL)
7287 return FALSE;
7288
7289 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7290 p, 0, need_pad->size))
7291 return FALSE;
7292
7293 need_pad->contents = p;
7294 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7295 }
7296 else
7297 {
7298 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7299 if (p == NULL)
7300 return FALSE;
7301
7302 need_pad->contents = p;
7303 }
7304
7305 memset (need_pad->contents + need_pad->size, 0, 8);
7306 need_pad->size += 8;
7307 }
7308
7309 return TRUE;
7310 }
7311
7312 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7313
7314 asection *
7315 ppc64_elf_tls_setup (struct bfd_link_info *info,
7316 int no_tls_get_addr_opt,
7317 int *no_multi_toc)
7318 {
7319 struct ppc_link_hash_table *htab;
7320
7321 htab = ppc_hash_table (info);
7322 if (htab == NULL)
7323 return NULL;
7324
7325 if (*no_multi_toc)
7326 htab->do_multi_toc = 0;
7327 else if (!htab->do_multi_toc)
7328 *no_multi_toc = 1;
7329
7330 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7331 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7332 FALSE, FALSE, TRUE));
7333 /* Move dynamic linking info to the function descriptor sym. */
7334 if (htab->tls_get_addr != NULL)
7335 func_desc_adjust (&htab->tls_get_addr->elf, info);
7336 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7337 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7338 FALSE, FALSE, TRUE));
7339 if (!no_tls_get_addr_opt)
7340 {
7341 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7342
7343 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7344 FALSE, FALSE, TRUE);
7345 if (opt != NULL)
7346 func_desc_adjust (opt, info);
7347 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7348 FALSE, FALSE, TRUE);
7349 if (opt_fd != NULL
7350 && (opt_fd->root.type == bfd_link_hash_defined
7351 || opt_fd->root.type == bfd_link_hash_defweak))
7352 {
7353 /* If glibc supports an optimized __tls_get_addr call stub,
7354 signalled by the presence of __tls_get_addr_opt, and we'll
7355 be calling __tls_get_addr via a plt call stub, then
7356 make __tls_get_addr point to __tls_get_addr_opt. */
7357 tga_fd = &htab->tls_get_addr_fd->elf;
7358 if (htab->elf.dynamic_sections_created
7359 && tga_fd != NULL
7360 && (tga_fd->type == STT_FUNC
7361 || tga_fd->needs_plt)
7362 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7363 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7364 && tga_fd->root.type == bfd_link_hash_undefweak)))
7365 {
7366 struct plt_entry *ent;
7367
7368 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7369 if (ent->plt.refcount > 0)
7370 break;
7371 if (ent != NULL)
7372 {
7373 tga_fd->root.type = bfd_link_hash_indirect;
7374 tga_fd->root.u.i.link = &opt_fd->root;
7375 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7376 if (opt_fd->dynindx != -1)
7377 {
7378 /* Use __tls_get_addr_opt in dynamic relocations. */
7379 opt_fd->dynindx = -1;
7380 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7381 opt_fd->dynstr_index);
7382 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7383 return NULL;
7384 }
7385 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7386 tga = &htab->tls_get_addr->elf;
7387 if (opt != NULL && tga != NULL)
7388 {
7389 tga->root.type = bfd_link_hash_indirect;
7390 tga->root.u.i.link = &opt->root;
7391 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7392 _bfd_elf_link_hash_hide_symbol (info, opt,
7393 tga->forced_local);
7394 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7395 }
7396 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7397 htab->tls_get_addr_fd->is_func_descriptor = 1;
7398 if (htab->tls_get_addr != NULL)
7399 {
7400 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7401 htab->tls_get_addr->is_func = 1;
7402 }
7403 }
7404 }
7405 }
7406 else
7407 no_tls_get_addr_opt = TRUE;
7408 }
7409 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7410 return _bfd_elf_tls_setup (info->output_bfd, info);
7411 }
7412
7413 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7414 HASH1 or HASH2. */
7415
7416 static bfd_boolean
7417 branch_reloc_hash_match (const bfd *ibfd,
7418 const Elf_Internal_Rela *rel,
7419 const struct ppc_link_hash_entry *hash1,
7420 const struct ppc_link_hash_entry *hash2)
7421 {
7422 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7423 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7424 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7425
7426 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7427 {
7428 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7429 struct elf_link_hash_entry *h;
7430
7431 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7432 h = elf_follow_link (h);
7433 if (h == &hash1->elf || h == &hash2->elf)
7434 return TRUE;
7435 }
7436 return FALSE;
7437 }
7438
7439 /* Run through all the TLS relocs looking for optimization
7440 opportunities. The linker has been hacked (see ppc64elf.em) to do
7441 a preliminary section layout so that we know the TLS segment
7442 offsets. We can't optimize earlier because some optimizations need
7443 to know the tp offset, and we need to optimize before allocating
7444 dynamic relocations. */
7445
7446 bfd_boolean
7447 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7448 {
7449 bfd *ibfd;
7450 asection *sec;
7451 struct ppc_link_hash_table *htab;
7452 int pass;
7453
7454 if (info->relocatable || !info->executable)
7455 return TRUE;
7456
7457 htab = ppc_hash_table (info);
7458 if (htab == NULL)
7459 return FALSE;
7460
7461 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7462 {
7463 Elf_Internal_Sym *locsyms = NULL;
7464 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7465 unsigned char *toc_ref = NULL;
7466
7467 /* Look at all the sections for this file. Make two passes over
7468 the relocs. On the first pass, mark toc entries involved
7469 with tls relocs, and check that tls relocs involved in
7470 setting up a tls_get_addr call are indeed followed by such a
7471 call. If they are not, exclude them from the optimizations
7472 done on the second pass. */
7473 for (pass = 0; pass < 2; ++pass)
7474 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7475 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7476 {
7477 Elf_Internal_Rela *relstart, *rel, *relend;
7478
7479 /* Read the relocations. */
7480 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7481 info->keep_memory);
7482 if (relstart == NULL)
7483 return FALSE;
7484
7485 relend = relstart + sec->reloc_count;
7486 for (rel = relstart; rel < relend; rel++)
7487 {
7488 enum elf_ppc64_reloc_type r_type;
7489 unsigned long r_symndx;
7490 struct elf_link_hash_entry *h;
7491 Elf_Internal_Sym *sym;
7492 asection *sym_sec;
7493 unsigned char *tls_mask;
7494 unsigned char tls_set, tls_clear, tls_type = 0;
7495 bfd_vma value;
7496 bfd_boolean ok_tprel, is_local;
7497 long toc_ref_index = 0;
7498 int expecting_tls_get_addr = 0;
7499
7500 r_symndx = ELF64_R_SYM (rel->r_info);
7501 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7502 r_symndx, ibfd))
7503 {
7504 err_free_rel:
7505 if (elf_section_data (sec)->relocs != relstart)
7506 free (relstart);
7507 if (toc_ref != NULL)
7508 free (toc_ref);
7509 if (locsyms != NULL
7510 && (elf_symtab_hdr (ibfd).contents
7511 != (unsigned char *) locsyms))
7512 free (locsyms);
7513 return FALSE;
7514 }
7515
7516 if (h != NULL)
7517 {
7518 if (h->root.type == bfd_link_hash_defined
7519 || h->root.type == bfd_link_hash_defweak)
7520 value = h->root.u.def.value;
7521 else if (h->root.type == bfd_link_hash_undefweak)
7522 value = 0;
7523 else
7524 continue;
7525 }
7526 else
7527 /* Symbols referenced by TLS relocs must be of type
7528 STT_TLS. So no need for .opd local sym adjust. */
7529 value = sym->st_value;
7530
7531 ok_tprel = FALSE;
7532 is_local = FALSE;
7533 if (h == NULL
7534 || !h->def_dynamic)
7535 {
7536 is_local = TRUE;
7537 if (h != NULL
7538 && h->root.type == bfd_link_hash_undefweak)
7539 ok_tprel = TRUE;
7540 else
7541 {
7542 value += sym_sec->output_offset;
7543 value += sym_sec->output_section->vma;
7544 value -= htab->elf.tls_sec->vma;
7545 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7546 < (bfd_vma) 1 << 32);
7547 }
7548 }
7549
7550 r_type = ELF64_R_TYPE (rel->r_info);
7551 switch (r_type)
7552 {
7553 case R_PPC64_GOT_TLSLD16:
7554 case R_PPC64_GOT_TLSLD16_LO:
7555 expecting_tls_get_addr = 1;
7556 /* Fall thru */
7557
7558 case R_PPC64_GOT_TLSLD16_HI:
7559 case R_PPC64_GOT_TLSLD16_HA:
7560 /* These relocs should never be against a symbol
7561 defined in a shared lib. Leave them alone if
7562 that turns out to be the case. */
7563 if (!is_local)
7564 continue;
7565
7566 /* LD -> LE */
7567 tls_set = 0;
7568 tls_clear = TLS_LD;
7569 tls_type = TLS_TLS | TLS_LD;
7570 break;
7571
7572 case R_PPC64_GOT_TLSGD16:
7573 case R_PPC64_GOT_TLSGD16_LO:
7574 expecting_tls_get_addr = 1;
7575 /* Fall thru */
7576
7577 case R_PPC64_GOT_TLSGD16_HI:
7578 case R_PPC64_GOT_TLSGD16_HA:
7579 if (ok_tprel)
7580 /* GD -> LE */
7581 tls_set = 0;
7582 else
7583 /* GD -> IE */
7584 tls_set = TLS_TLS | TLS_TPRELGD;
7585 tls_clear = TLS_GD;
7586 tls_type = TLS_TLS | TLS_GD;
7587 break;
7588
7589 case R_PPC64_GOT_TPREL16_DS:
7590 case R_PPC64_GOT_TPREL16_LO_DS:
7591 case R_PPC64_GOT_TPREL16_HI:
7592 case R_PPC64_GOT_TPREL16_HA:
7593 if (ok_tprel)
7594 {
7595 /* IE -> LE */
7596 tls_set = 0;
7597 tls_clear = TLS_TPREL;
7598 tls_type = TLS_TLS | TLS_TPREL;
7599 break;
7600 }
7601 continue;
7602
7603 case R_PPC64_TOC16:
7604 case R_PPC64_TOC16_LO:
7605 case R_PPC64_TLS:
7606 case R_PPC64_TLSGD:
7607 case R_PPC64_TLSLD:
7608 if (sym_sec == NULL || sym_sec != toc)
7609 continue;
7610
7611 /* Mark this toc entry as referenced by a TLS
7612 code sequence. We can do that now in the
7613 case of R_PPC64_TLS, and after checking for
7614 tls_get_addr for the TOC16 relocs. */
7615 if (toc_ref == NULL)
7616 {
7617 toc_ref = bfd_zmalloc (toc->size / 8);
7618 if (toc_ref == NULL)
7619 goto err_free_rel;
7620 }
7621 if (h != NULL)
7622 value = h->root.u.def.value;
7623 else
7624 value = sym->st_value;
7625 value += rel->r_addend;
7626 BFD_ASSERT (value < toc->size && value % 8 == 0);
7627 toc_ref_index = value / 8;
7628 if (r_type == R_PPC64_TLS
7629 || r_type == R_PPC64_TLSGD
7630 || r_type == R_PPC64_TLSLD)
7631 {
7632 toc_ref[toc_ref_index] = 1;
7633 continue;
7634 }
7635
7636 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7637 continue;
7638
7639 tls_set = 0;
7640 tls_clear = 0;
7641 expecting_tls_get_addr = 2;
7642 break;
7643
7644 case R_PPC64_TPREL64:
7645 if (pass == 0
7646 || sec != toc
7647 || toc_ref == NULL
7648 || !toc_ref[rel->r_offset / 8])
7649 continue;
7650 if (ok_tprel)
7651 {
7652 /* IE -> LE */
7653 tls_set = TLS_EXPLICIT;
7654 tls_clear = TLS_TPREL;
7655 break;
7656 }
7657 continue;
7658
7659 case R_PPC64_DTPMOD64:
7660 if (pass == 0
7661 || sec != toc
7662 || toc_ref == NULL
7663 || !toc_ref[rel->r_offset / 8])
7664 continue;
7665 if (rel + 1 < relend
7666 && (rel[1].r_info
7667 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7668 && rel[1].r_offset == rel->r_offset + 8)
7669 {
7670 if (ok_tprel)
7671 /* GD -> LE */
7672 tls_set = TLS_EXPLICIT | TLS_GD;
7673 else
7674 /* GD -> IE */
7675 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7676 tls_clear = TLS_GD;
7677 }
7678 else
7679 {
7680 if (!is_local)
7681 continue;
7682
7683 /* LD -> LE */
7684 tls_set = TLS_EXPLICIT;
7685 tls_clear = TLS_LD;
7686 }
7687 break;
7688
7689 default:
7690 continue;
7691 }
7692
7693 if (pass == 0)
7694 {
7695 if (!expecting_tls_get_addr
7696 || !sec->has_tls_get_addr_call)
7697 continue;
7698
7699 if (rel + 1 < relend
7700 && branch_reloc_hash_match (ibfd, rel + 1,
7701 htab->tls_get_addr,
7702 htab->tls_get_addr_fd))
7703 {
7704 if (expecting_tls_get_addr == 2)
7705 {
7706 /* Check for toc tls entries. */
7707 unsigned char *toc_tls;
7708 int retval;
7709
7710 retval = get_tls_mask (&toc_tls, NULL, NULL,
7711 &locsyms,
7712 rel, ibfd);
7713 if (retval == 0)
7714 goto err_free_rel;
7715 if (retval > 1 && toc_tls != NULL)
7716 toc_ref[toc_ref_index] = 1;
7717 }
7718 continue;
7719 }
7720
7721 if (expecting_tls_get_addr != 1)
7722 continue;
7723
7724 /* Uh oh, we didn't find the expected call. We
7725 could just mark this symbol to exclude it
7726 from tls optimization but it's safer to skip
7727 the entire section. */
7728 sec->has_tls_reloc = 0;
7729 break;
7730 }
7731
7732 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7733 {
7734 struct plt_entry *ent;
7735 for (ent = htab->tls_get_addr->elf.plt.plist;
7736 ent != NULL;
7737 ent = ent->next)
7738 if (ent->addend == 0)
7739 {
7740 if (ent->plt.refcount > 0)
7741 {
7742 ent->plt.refcount -= 1;
7743 expecting_tls_get_addr = 0;
7744 }
7745 break;
7746 }
7747 }
7748
7749 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7750 {
7751 struct plt_entry *ent;
7752 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7753 ent != NULL;
7754 ent = ent->next)
7755 if (ent->addend == 0)
7756 {
7757 if (ent->plt.refcount > 0)
7758 ent->plt.refcount -= 1;
7759 break;
7760 }
7761 }
7762
7763 if (tls_clear == 0)
7764 continue;
7765
7766 if ((tls_set & TLS_EXPLICIT) == 0)
7767 {
7768 struct got_entry *ent;
7769
7770 /* Adjust got entry for this reloc. */
7771 if (h != NULL)
7772 ent = h->got.glist;
7773 else
7774 ent = elf_local_got_ents (ibfd)[r_symndx];
7775
7776 for (; ent != NULL; ent = ent->next)
7777 if (ent->addend == rel->r_addend
7778 && ent->owner == ibfd
7779 && ent->tls_type == tls_type)
7780 break;
7781 if (ent == NULL)
7782 abort ();
7783
7784 if (tls_set == 0)
7785 {
7786 /* We managed to get rid of a got entry. */
7787 if (ent->got.refcount > 0)
7788 ent->got.refcount -= 1;
7789 }
7790 }
7791 else
7792 {
7793 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7794 we'll lose one or two dyn relocs. */
7795 if (!dec_dynrel_count (rel->r_info, sec, info,
7796 NULL, h, sym_sec))
7797 return FALSE;
7798
7799 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7800 {
7801 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7802 NULL, h, sym_sec))
7803 return FALSE;
7804 }
7805 }
7806
7807 *tls_mask |= tls_set;
7808 *tls_mask &= ~tls_clear;
7809 }
7810
7811 if (elf_section_data (sec)->relocs != relstart)
7812 free (relstart);
7813 }
7814
7815 if (toc_ref != NULL)
7816 free (toc_ref);
7817
7818 if (locsyms != NULL
7819 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7820 {
7821 if (!info->keep_memory)
7822 free (locsyms);
7823 else
7824 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7825 }
7826 }
7827 return TRUE;
7828 }
7829
7830 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7831 the values of any global symbols in a toc section that has been
7832 edited. Globals in toc sections should be a rarity, so this function
7833 sets a flag if any are found in toc sections other than the one just
7834 edited, so that futher hash table traversals can be avoided. */
7835
7836 struct adjust_toc_info
7837 {
7838 asection *toc;
7839 unsigned long *skip;
7840 bfd_boolean global_toc_syms;
7841 };
7842
7843 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7844
7845 static bfd_boolean
7846 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7847 {
7848 struct ppc_link_hash_entry *eh;
7849 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7850 unsigned long i;
7851
7852 if (h->root.type == bfd_link_hash_indirect)
7853 return TRUE;
7854
7855 if (h->root.type == bfd_link_hash_warning)
7856 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7857
7858 if (h->root.type != bfd_link_hash_defined
7859 && h->root.type != bfd_link_hash_defweak)
7860 return TRUE;
7861
7862 eh = (struct ppc_link_hash_entry *) h;
7863 if (eh->adjust_done)
7864 return TRUE;
7865
7866 if (eh->elf.root.u.def.section == toc_inf->toc)
7867 {
7868 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7869 i = toc_inf->toc->rawsize >> 3;
7870 else
7871 i = eh->elf.root.u.def.value >> 3;
7872
7873 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7874 {
7875 (*_bfd_error_handler)
7876 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7877 do
7878 ++i;
7879 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7880 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7881 }
7882
7883 eh->elf.root.u.def.value -= toc_inf->skip[i];
7884 eh->adjust_done = 1;
7885 }
7886 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7887 toc_inf->global_toc_syms = TRUE;
7888
7889 return TRUE;
7890 }
7891
7892 /* Examine all relocs referencing .toc sections in order to remove
7893 unused .toc entries. */
7894
7895 bfd_boolean
7896 ppc64_elf_edit_toc (struct bfd_link_info *info)
7897 {
7898 bfd *ibfd;
7899 struct adjust_toc_info toc_inf;
7900 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7901
7902 htab->do_toc_opt = 1;
7903 toc_inf.global_toc_syms = TRUE;
7904 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7905 {
7906 asection *toc, *sec;
7907 Elf_Internal_Shdr *symtab_hdr;
7908 Elf_Internal_Sym *local_syms;
7909 Elf_Internal_Rela *relstart, *rel;
7910 unsigned long *skip, *drop;
7911 unsigned char *used;
7912 unsigned char *keep, last, some_unused;
7913
7914 if (!is_ppc64_elf (ibfd))
7915 continue;
7916
7917 toc = bfd_get_section_by_name (ibfd, ".toc");
7918 if (toc == NULL
7919 || toc->size == 0
7920 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7921 || elf_discarded_section (toc))
7922 continue;
7923
7924 local_syms = NULL;
7925 symtab_hdr = &elf_symtab_hdr (ibfd);
7926
7927 /* Look at sections dropped from the final link. */
7928 skip = NULL;
7929 relstart = NULL;
7930 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7931 {
7932 if (sec->reloc_count == 0
7933 || !elf_discarded_section (sec)
7934 || get_opd_info (sec)
7935 || (sec->flags & SEC_ALLOC) == 0
7936 || (sec->flags & SEC_DEBUGGING) != 0)
7937 continue;
7938
7939 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7940 if (relstart == NULL)
7941 goto error_ret;
7942
7943 /* Run through the relocs to see which toc entries might be
7944 unused. */
7945 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7946 {
7947 enum elf_ppc64_reloc_type r_type;
7948 unsigned long r_symndx;
7949 asection *sym_sec;
7950 struct elf_link_hash_entry *h;
7951 Elf_Internal_Sym *sym;
7952 bfd_vma val;
7953
7954 r_type = ELF64_R_TYPE (rel->r_info);
7955 switch (r_type)
7956 {
7957 default:
7958 continue;
7959
7960 case R_PPC64_TOC16:
7961 case R_PPC64_TOC16_LO:
7962 case R_PPC64_TOC16_HI:
7963 case R_PPC64_TOC16_HA:
7964 case R_PPC64_TOC16_DS:
7965 case R_PPC64_TOC16_LO_DS:
7966 break;
7967 }
7968
7969 r_symndx = ELF64_R_SYM (rel->r_info);
7970 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7971 r_symndx, ibfd))
7972 goto error_ret;
7973
7974 if (sym_sec != toc)
7975 continue;
7976
7977 if (h != NULL)
7978 val = h->root.u.def.value;
7979 else
7980 val = sym->st_value;
7981 val += rel->r_addend;
7982
7983 if (val >= toc->size)
7984 continue;
7985
7986 /* Anything in the toc ought to be aligned to 8 bytes.
7987 If not, don't mark as unused. */
7988 if (val & 7)
7989 continue;
7990
7991 if (skip == NULL)
7992 {
7993 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
7994 if (skip == NULL)
7995 goto error_ret;
7996 }
7997
7998 skip[val >> 3] = ref_from_discarded;
7999 }
8000
8001 if (elf_section_data (sec)->relocs != relstart)
8002 free (relstart);
8003 }
8004
8005 /* For largetoc loads of address constants, we can convert
8006 . addis rx,2,addr@got@ha
8007 . ld ry,addr@got@l(rx)
8008 to
8009 . addis rx,2,addr@toc@ha
8010 . addi ry,rx,addr@toc@l
8011 when addr is within 2G of the toc pointer. This then means
8012 that the word storing "addr" in the toc is no longer needed. */
8013
8014 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8015 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8016 && toc->reloc_count != 0)
8017 {
8018 /* Read toc relocs. */
8019 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8020 info->keep_memory);
8021 if (relstart == NULL)
8022 goto error_ret;
8023
8024 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8025 {
8026 enum elf_ppc64_reloc_type r_type;
8027 unsigned long r_symndx;
8028 asection *sym_sec;
8029 struct elf_link_hash_entry *h;
8030 Elf_Internal_Sym *sym;
8031 bfd_vma val, addr;
8032
8033 r_type = ELF64_R_TYPE (rel->r_info);
8034 if (r_type != R_PPC64_ADDR64)
8035 continue;
8036
8037 r_symndx = ELF64_R_SYM (rel->r_info);
8038 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8039 r_symndx, ibfd))
8040 goto error_ret;
8041
8042 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8043 continue;
8044
8045 if (h != NULL)
8046 val = h->root.u.def.value;
8047 else
8048 val = sym->st_value;
8049 val += rel->r_addend;
8050 val += sym_sec->output_section->vma + sym_sec->output_offset;
8051
8052 /* We don't yet know the exact toc pointer value, but we
8053 know it will be somewhere in the toc section. Don't
8054 optimize if the difference from any possible toc
8055 pointer is outside [ff..f80008000, 7fff7fff]. */
8056 addr = toc->output_section->vma + TOC_BASE_OFF;
8057 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8058 continue;
8059
8060 addr = toc->output_section->vma + toc->output_section->rawsize;
8061 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8062 continue;
8063
8064 if (skip == NULL)
8065 {
8066 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8067 if (skip == NULL)
8068 goto error_ret;
8069 }
8070
8071 skip[rel->r_offset >> 3]
8072 |= can_optimize | ((rel - relstart) << 2);
8073 }
8074
8075 if (elf_section_data (toc)->relocs != relstart)
8076 free (relstart);
8077 }
8078
8079 if (skip == NULL)
8080 continue;
8081
8082 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8083 if (used == NULL)
8084 {
8085 error_ret:
8086 if (local_syms != NULL
8087 && symtab_hdr->contents != (unsigned char *) local_syms)
8088 free (local_syms);
8089 if (sec != NULL
8090 && relstart != NULL
8091 && elf_section_data (sec)->relocs != relstart)
8092 free (relstart);
8093 if (skip != NULL)
8094 free (skip);
8095 return FALSE;
8096 }
8097
8098 /* Now check all kept sections that might reference the toc.
8099 Check the toc itself last. */
8100 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8101 : ibfd->sections);
8102 sec != NULL;
8103 sec = (sec == toc ? NULL
8104 : sec->next == NULL ? toc
8105 : sec->next == toc && toc->next ? toc->next
8106 : sec->next))
8107 {
8108 int repeat;
8109
8110 if (sec->reloc_count == 0
8111 || elf_discarded_section (sec)
8112 || get_opd_info (sec)
8113 || (sec->flags & SEC_ALLOC) == 0
8114 || (sec->flags & SEC_DEBUGGING) != 0)
8115 continue;
8116
8117 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8118 info->keep_memory);
8119 if (relstart == NULL)
8120 goto error_ret;
8121
8122 /* Mark toc entries referenced as used. */
8123 repeat = 0;
8124 do
8125 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8126 {
8127 enum elf_ppc64_reloc_type r_type;
8128 unsigned long r_symndx;
8129 asection *sym_sec;
8130 struct elf_link_hash_entry *h;
8131 Elf_Internal_Sym *sym;
8132 bfd_vma val;
8133
8134 r_type = ELF64_R_TYPE (rel->r_info);
8135 switch (r_type)
8136 {
8137 case R_PPC64_TOC16:
8138 case R_PPC64_TOC16_LO:
8139 case R_PPC64_TOC16_HI:
8140 case R_PPC64_TOC16_HA:
8141 case R_PPC64_TOC16_DS:
8142 case R_PPC64_TOC16_LO_DS:
8143 /* In case we're taking addresses of toc entries. */
8144 case R_PPC64_ADDR64:
8145 break;
8146
8147 default:
8148 continue;
8149 }
8150
8151 r_symndx = ELF64_R_SYM (rel->r_info);
8152 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8153 r_symndx, ibfd))
8154 {
8155 free (used);
8156 goto error_ret;
8157 }
8158
8159 if (sym_sec != toc)
8160 continue;
8161
8162 if (h != NULL)
8163 val = h->root.u.def.value;
8164 else
8165 val = sym->st_value;
8166 val += rel->r_addend;
8167
8168 if (val >= toc->size)
8169 continue;
8170
8171 if ((skip[val >> 3] & can_optimize) != 0)
8172 {
8173 bfd_vma off;
8174 unsigned char opc;
8175
8176 switch (r_type)
8177 {
8178 case R_PPC64_TOC16_HA:
8179 break;
8180
8181 case R_PPC64_TOC16_LO_DS:
8182 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8183 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8184 return FALSE;
8185 if ((opc & (0x3f << 2)) == (58u << 2))
8186 break;
8187 /* Fall thru */
8188
8189 default:
8190 /* Wrong sort of reloc, or not a ld. We may
8191 as well clear ref_from_discarded too. */
8192 skip[val >> 3] = 0;
8193 }
8194 }
8195
8196 /* For the toc section, we only mark as used if
8197 this entry itself isn't unused. */
8198 if (sec == toc
8199 && !used[val >> 3]
8200 && (used[rel->r_offset >> 3]
8201 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8202 /* Do all the relocs again, to catch reference
8203 chains. */
8204 repeat = 1;
8205
8206 used[val >> 3] = 1;
8207 }
8208 while (repeat);
8209
8210 if (elf_section_data (sec)->relocs != relstart)
8211 free (relstart);
8212 }
8213
8214 /* Merge the used and skip arrays. Assume that TOC
8215 doublewords not appearing as either used or unused belong
8216 to to an entry more than one doubleword in size. */
8217 for (drop = skip, keep = used, last = 0, some_unused = 0;
8218 drop < skip + (toc->size + 7) / 8;
8219 ++drop, ++keep)
8220 {
8221 if (*keep)
8222 {
8223 *drop &= ~ref_from_discarded;
8224 if ((*drop & can_optimize) != 0)
8225 some_unused = 1;
8226 last = 0;
8227 }
8228 else if (*drop)
8229 {
8230 some_unused = 1;
8231 last = ref_from_discarded;
8232 }
8233 else
8234 *drop = last;
8235 }
8236
8237 free (used);
8238
8239 if (some_unused)
8240 {
8241 bfd_byte *contents, *src;
8242 unsigned long off;
8243 bfd_boolean local_toc_syms = FALSE;
8244
8245 /* Shuffle the toc contents, and at the same time convert the
8246 skip array from booleans into offsets. */
8247 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8248 goto error_ret;
8249
8250 elf_section_data (toc)->this_hdr.contents = contents;
8251
8252 for (src = contents, off = 0, drop = skip;
8253 src < contents + toc->size;
8254 src += 8, ++drop)
8255 {
8256 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8257 off += 8;
8258 else if (off != 0)
8259 {
8260 *drop = off;
8261 memcpy (src - off, src, 8);
8262 }
8263 }
8264 *drop = off;
8265 toc->rawsize = toc->size;
8266 toc->size = src - contents - off;
8267
8268 /* Adjust addends for relocs against the toc section sym,
8269 and optimize any accesses we can. */
8270 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8271 {
8272 if (sec->reloc_count == 0
8273 || elf_discarded_section (sec))
8274 continue;
8275
8276 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8277 info->keep_memory);
8278 if (relstart == NULL)
8279 goto error_ret;
8280
8281 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8282 {
8283 enum elf_ppc64_reloc_type r_type;
8284 unsigned long r_symndx;
8285 asection *sym_sec;
8286 struct elf_link_hash_entry *h;
8287 Elf_Internal_Sym *sym;
8288 bfd_vma val;
8289
8290 r_type = ELF64_R_TYPE (rel->r_info);
8291 switch (r_type)
8292 {
8293 default:
8294 continue;
8295
8296 case R_PPC64_TOC16:
8297 case R_PPC64_TOC16_LO:
8298 case R_PPC64_TOC16_HI:
8299 case R_PPC64_TOC16_HA:
8300 case R_PPC64_TOC16_DS:
8301 case R_PPC64_TOC16_LO_DS:
8302 case R_PPC64_ADDR64:
8303 break;
8304 }
8305
8306 r_symndx = ELF64_R_SYM (rel->r_info);
8307 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8308 r_symndx, ibfd))
8309 goto error_ret;
8310
8311 if (sym_sec != toc)
8312 continue;
8313
8314 if (h != NULL)
8315 val = h->root.u.def.value;
8316 else
8317 {
8318 val = sym->st_value;
8319 if (val != 0)
8320 local_toc_syms = TRUE;
8321 }
8322
8323 val += rel->r_addend;
8324
8325 if (val > toc->rawsize)
8326 val = toc->rawsize;
8327 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8328 continue;
8329 else if ((skip[val >> 3] & can_optimize) != 0)
8330 {
8331 Elf_Internal_Rela *tocrel
8332 = elf_section_data (toc)->relocs + (skip[val >> 3] >> 2);
8333 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8334
8335 switch (r_type)
8336 {
8337 case R_PPC64_TOC16_HA:
8338 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8339 break;
8340
8341 case R_PPC64_TOC16_LO_DS:
8342 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8343 break;
8344
8345 default:
8346 abort ();
8347 }
8348 rel->r_addend = tocrel->r_addend;
8349 elf_section_data (sec)->relocs = relstart;
8350 continue;
8351 }
8352
8353 if (h != NULL || sym->st_value != 0)
8354 continue;
8355
8356 rel->r_addend -= skip[val >> 3];
8357 elf_section_data (sec)->relocs = relstart;
8358 }
8359
8360 if (elf_section_data (sec)->relocs != relstart)
8361 free (relstart);
8362 }
8363
8364 /* We shouldn't have local or global symbols defined in the TOC,
8365 but handle them anyway. */
8366 if (local_toc_syms)
8367 {
8368 Elf_Internal_Sym *sym;
8369
8370 for (sym = local_syms;
8371 sym < local_syms + symtab_hdr->sh_info;
8372 ++sym)
8373 if (sym->st_value != 0
8374 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8375 {
8376 unsigned long i;
8377
8378 if (sym->st_value > toc->rawsize)
8379 i = toc->rawsize >> 3;
8380 else
8381 i = sym->st_value >> 3;
8382
8383 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8384 {
8385 (*_bfd_error_handler)
8386 (_("%s defined on removed toc entry"),
8387 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8388 do
8389 ++i;
8390 while ((skip[i] & (ref_from_discarded | can_optimize)));
8391 sym->st_value = (bfd_vma) i << 3;
8392 }
8393
8394 sym->st_value -= skip[i];
8395 symtab_hdr->contents = (unsigned char *) local_syms;
8396 }
8397 }
8398
8399 /* Adjust any global syms defined in this toc input section. */
8400 if (toc_inf.global_toc_syms)
8401 {
8402 toc_inf.toc = toc;
8403 toc_inf.skip = skip;
8404 toc_inf.global_toc_syms = FALSE;
8405 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8406 &toc_inf);
8407 }
8408
8409 if (toc->reloc_count != 0)
8410 {
8411 Elf_Internal_Rela *wrel;
8412 bfd_size_type sz;
8413
8414 /* Read toc relocs. */
8415 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8416 TRUE);
8417 if (relstart == NULL)
8418 goto error_ret;
8419
8420 /* Remove unused toc relocs, and adjust those we keep. */
8421 wrel = relstart;
8422 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8423 if ((skip[rel->r_offset >> 3]
8424 & (ref_from_discarded | can_optimize)) == 0)
8425 {
8426 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8427 wrel->r_info = rel->r_info;
8428 wrel->r_addend = rel->r_addend;
8429 ++wrel;
8430 }
8431 else if (!dec_dynrel_count (rel->r_info, toc, info,
8432 &local_syms, NULL, NULL))
8433 goto error_ret;
8434
8435 toc->reloc_count = wrel - relstart;
8436 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8437 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8438 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8439 }
8440 }
8441
8442 if (local_syms != NULL
8443 && symtab_hdr->contents != (unsigned char *) local_syms)
8444 {
8445 if (!info->keep_memory)
8446 free (local_syms);
8447 else
8448 symtab_hdr->contents = (unsigned char *) local_syms;
8449 }
8450 free (skip);
8451 }
8452
8453 return TRUE;
8454 }
8455
8456 /* Return true iff input section I references the TOC using
8457 instructions limited to +/-32k offsets. */
8458
8459 bfd_boolean
8460 ppc64_elf_has_small_toc_reloc (asection *i)
8461 {
8462 return (is_ppc64_elf (i->owner)
8463 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8464 }
8465
8466 /* Allocate space for one GOT entry. */
8467
8468 static void
8469 allocate_got (struct elf_link_hash_entry *h,
8470 struct bfd_link_info *info,
8471 struct got_entry *gent)
8472 {
8473 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8474 bfd_boolean dyn;
8475 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8476 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8477 ? 16 : 8);
8478 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8479 ? 2 : 1) * sizeof (Elf64_External_Rela);
8480 asection *got = ppc64_elf_tdata (gent->owner)->got;
8481
8482 gent->got.offset = got->size;
8483 got->size += entsize;
8484
8485 dyn = htab->elf.dynamic_sections_created;
8486 if ((info->shared
8487 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8488 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8489 || h->root.type != bfd_link_hash_undefweak))
8490 {
8491 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8492 relgot->size += rentsize;
8493 }
8494 else if (h->type == STT_GNU_IFUNC)
8495 {
8496 asection *relgot = htab->reliplt;
8497 relgot->size += rentsize;
8498 htab->got_reli_size += rentsize;
8499 }
8500 }
8501
8502 /* This function merges got entries in the same toc group. */
8503
8504 static void
8505 merge_got_entries (struct got_entry **pent)
8506 {
8507 struct got_entry *ent, *ent2;
8508
8509 for (ent = *pent; ent != NULL; ent = ent->next)
8510 if (!ent->is_indirect)
8511 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8512 if (!ent2->is_indirect
8513 && ent2->addend == ent->addend
8514 && ent2->tls_type == ent->tls_type
8515 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8516 {
8517 ent2->is_indirect = TRUE;
8518 ent2->got.ent = ent;
8519 }
8520 }
8521
8522 /* Allocate space in .plt, .got and associated reloc sections for
8523 dynamic relocs. */
8524
8525 static bfd_boolean
8526 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8527 {
8528 struct bfd_link_info *info;
8529 struct ppc_link_hash_table *htab;
8530 asection *s;
8531 struct ppc_link_hash_entry *eh;
8532 struct ppc_dyn_relocs *p;
8533 struct got_entry **pgent, *gent;
8534
8535 if (h->root.type == bfd_link_hash_indirect)
8536 return TRUE;
8537
8538 if (h->root.type == bfd_link_hash_warning)
8539 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8540
8541 info = (struct bfd_link_info *) inf;
8542 htab = ppc_hash_table (info);
8543 if (htab == NULL)
8544 return FALSE;
8545
8546 if ((htab->elf.dynamic_sections_created
8547 && h->dynindx != -1
8548 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8549 || h->type == STT_GNU_IFUNC)
8550 {
8551 struct plt_entry *pent;
8552 bfd_boolean doneone = FALSE;
8553 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8554 if (pent->plt.refcount > 0)
8555 {
8556 if (!htab->elf.dynamic_sections_created
8557 || h->dynindx == -1)
8558 {
8559 s = htab->iplt;
8560 pent->plt.offset = s->size;
8561 s->size += PLT_ENTRY_SIZE;
8562 s = htab->reliplt;
8563 }
8564 else
8565 {
8566 /* If this is the first .plt entry, make room for the special
8567 first entry. */
8568 s = htab->plt;
8569 if (s->size == 0)
8570 s->size += PLT_INITIAL_ENTRY_SIZE;
8571
8572 pent->plt.offset = s->size;
8573
8574 /* Make room for this entry. */
8575 s->size += PLT_ENTRY_SIZE;
8576
8577 /* Make room for the .glink code. */
8578 s = htab->glink;
8579 if (s->size == 0)
8580 s->size += GLINK_CALL_STUB_SIZE;
8581 /* We need bigger stubs past index 32767. */
8582 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8583 s->size += 4;
8584 s->size += 2*4;
8585
8586 /* We also need to make an entry in the .rela.plt section. */
8587 s = htab->relplt;
8588 }
8589 s->size += sizeof (Elf64_External_Rela);
8590 doneone = TRUE;
8591 }
8592 else
8593 pent->plt.offset = (bfd_vma) -1;
8594 if (!doneone)
8595 {
8596 h->plt.plist = NULL;
8597 h->needs_plt = 0;
8598 }
8599 }
8600 else
8601 {
8602 h->plt.plist = NULL;
8603 h->needs_plt = 0;
8604 }
8605
8606 eh = (struct ppc_link_hash_entry *) h;
8607 /* Run through the TLS GD got entries first if we're changing them
8608 to TPREL. */
8609 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8610 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8611 if (gent->got.refcount > 0
8612 && (gent->tls_type & TLS_GD) != 0)
8613 {
8614 /* This was a GD entry that has been converted to TPREL. If
8615 there happens to be a TPREL entry we can use that one. */
8616 struct got_entry *ent;
8617 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8618 if (ent->got.refcount > 0
8619 && (ent->tls_type & TLS_TPREL) != 0
8620 && ent->addend == gent->addend
8621 && ent->owner == gent->owner)
8622 {
8623 gent->got.refcount = 0;
8624 break;
8625 }
8626
8627 /* If not, then we'll be using our own TPREL entry. */
8628 if (gent->got.refcount != 0)
8629 gent->tls_type = TLS_TLS | TLS_TPREL;
8630 }
8631
8632 /* Remove any list entry that won't generate a word in the GOT before
8633 we call merge_got_entries. Otherwise we risk merging to empty
8634 entries. */
8635 pgent = &h->got.glist;
8636 while ((gent = *pgent) != NULL)
8637 if (gent->got.refcount > 0)
8638 {
8639 if ((gent->tls_type & TLS_LD) != 0
8640 && !h->def_dynamic)
8641 {
8642 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8643 *pgent = gent->next;
8644 }
8645 else
8646 pgent = &gent->next;
8647 }
8648 else
8649 *pgent = gent->next;
8650
8651 if (!htab->do_multi_toc)
8652 merge_got_entries (&h->got.glist);
8653
8654 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8655 if (!gent->is_indirect)
8656 {
8657 /* Make sure this symbol is output as a dynamic symbol.
8658 Undefined weak syms won't yet be marked as dynamic,
8659 nor will all TLS symbols. */
8660 if (h->dynindx == -1
8661 && !h->forced_local
8662 && h->type != STT_GNU_IFUNC
8663 && htab->elf.dynamic_sections_created)
8664 {
8665 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8666 return FALSE;
8667 }
8668
8669 if (!is_ppc64_elf (gent->owner))
8670 abort ();
8671
8672 allocate_got (h, info, gent);
8673 }
8674
8675 if (eh->dyn_relocs == NULL
8676 || (!htab->elf.dynamic_sections_created
8677 && h->type != STT_GNU_IFUNC))
8678 return TRUE;
8679
8680 /* In the shared -Bsymbolic case, discard space allocated for
8681 dynamic pc-relative relocs against symbols which turn out to be
8682 defined in regular objects. For the normal shared case, discard
8683 space for relocs that have become local due to symbol visibility
8684 changes. */
8685
8686 if (info->shared)
8687 {
8688 /* Relocs that use pc_count are those that appear on a call insn,
8689 or certain REL relocs (see must_be_dyn_reloc) that can be
8690 generated via assembly. We want calls to protected symbols to
8691 resolve directly to the function rather than going via the plt.
8692 If people want function pointer comparisons to work as expected
8693 then they should avoid writing weird assembly. */
8694 if (SYMBOL_CALLS_LOCAL (info, h))
8695 {
8696 struct ppc_dyn_relocs **pp;
8697
8698 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8699 {
8700 p->count -= p->pc_count;
8701 p->pc_count = 0;
8702 if (p->count == 0)
8703 *pp = p->next;
8704 else
8705 pp = &p->next;
8706 }
8707 }
8708
8709 /* Also discard relocs on undefined weak syms with non-default
8710 visibility. */
8711 if (eh->dyn_relocs != NULL
8712 && h->root.type == bfd_link_hash_undefweak)
8713 {
8714 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8715 eh->dyn_relocs = NULL;
8716
8717 /* Make sure this symbol is output as a dynamic symbol.
8718 Undefined weak syms won't yet be marked as dynamic. */
8719 else if (h->dynindx == -1
8720 && !h->forced_local)
8721 {
8722 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8723 return FALSE;
8724 }
8725 }
8726 }
8727 else if (h->type == STT_GNU_IFUNC)
8728 {
8729 if (!h->non_got_ref)
8730 eh->dyn_relocs = NULL;
8731 }
8732 else if (ELIMINATE_COPY_RELOCS)
8733 {
8734 /* For the non-shared case, discard space for relocs against
8735 symbols which turn out to need copy relocs or are not
8736 dynamic. */
8737
8738 if (!h->non_got_ref
8739 && !h->def_regular)
8740 {
8741 /* Make sure this symbol is output as a dynamic symbol.
8742 Undefined weak syms won't yet be marked as dynamic. */
8743 if (h->dynindx == -1
8744 && !h->forced_local)
8745 {
8746 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8747 return FALSE;
8748 }
8749
8750 /* If that succeeded, we know we'll be keeping all the
8751 relocs. */
8752 if (h->dynindx != -1)
8753 goto keep;
8754 }
8755
8756 eh->dyn_relocs = NULL;
8757
8758 keep: ;
8759 }
8760
8761 /* Finally, allocate space. */
8762 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8763 {
8764 asection *sreloc = elf_section_data (p->sec)->sreloc;
8765 if (!htab->elf.dynamic_sections_created)
8766 sreloc = htab->reliplt;
8767 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8768 }
8769
8770 return TRUE;
8771 }
8772
8773 /* Find any dynamic relocs that apply to read-only sections. */
8774
8775 static bfd_boolean
8776 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8777 {
8778 struct ppc_link_hash_entry *eh;
8779 struct ppc_dyn_relocs *p;
8780
8781 if (h->root.type == bfd_link_hash_warning)
8782 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8783
8784 eh = (struct ppc_link_hash_entry *) h;
8785 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8786 {
8787 asection *s = p->sec->output_section;
8788
8789 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8790 {
8791 struct bfd_link_info *info = inf;
8792
8793 info->flags |= DF_TEXTREL;
8794
8795 /* Not an error, just cut short the traversal. */
8796 return FALSE;
8797 }
8798 }
8799 return TRUE;
8800 }
8801
8802 /* Set the sizes of the dynamic sections. */
8803
8804 static bfd_boolean
8805 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8806 struct bfd_link_info *info)
8807 {
8808 struct ppc_link_hash_table *htab;
8809 bfd *dynobj;
8810 asection *s;
8811 bfd_boolean relocs;
8812 bfd *ibfd;
8813 struct got_entry *first_tlsld;
8814
8815 htab = ppc_hash_table (info);
8816 if (htab == NULL)
8817 return FALSE;
8818
8819 dynobj = htab->elf.dynobj;
8820 if (dynobj == NULL)
8821 abort ();
8822
8823 if (htab->elf.dynamic_sections_created)
8824 {
8825 /* Set the contents of the .interp section to the interpreter. */
8826 if (info->executable)
8827 {
8828 s = bfd_get_section_by_name (dynobj, ".interp");
8829 if (s == NULL)
8830 abort ();
8831 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8832 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8833 }
8834 }
8835
8836 /* Set up .got offsets for local syms, and space for local dynamic
8837 relocs. */
8838 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8839 {
8840 struct got_entry **lgot_ents;
8841 struct got_entry **end_lgot_ents;
8842 struct plt_entry **local_plt;
8843 struct plt_entry **end_local_plt;
8844 unsigned char *lgot_masks;
8845 bfd_size_type locsymcount;
8846 Elf_Internal_Shdr *symtab_hdr;
8847 asection *srel;
8848
8849 if (!is_ppc64_elf (ibfd))
8850 continue;
8851
8852 for (s = ibfd->sections; s != NULL; s = s->next)
8853 {
8854 struct ppc_dyn_relocs *p;
8855
8856 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8857 {
8858 if (!bfd_is_abs_section (p->sec)
8859 && bfd_is_abs_section (p->sec->output_section))
8860 {
8861 /* Input section has been discarded, either because
8862 it is a copy of a linkonce section or due to
8863 linker script /DISCARD/, so we'll be discarding
8864 the relocs too. */
8865 }
8866 else if (p->count != 0)
8867 {
8868 srel = elf_section_data (p->sec)->sreloc;
8869 if (!htab->elf.dynamic_sections_created)
8870 srel = htab->reliplt;
8871 srel->size += p->count * sizeof (Elf64_External_Rela);
8872 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8873 info->flags |= DF_TEXTREL;
8874 }
8875 }
8876 }
8877
8878 lgot_ents = elf_local_got_ents (ibfd);
8879 if (!lgot_ents)
8880 continue;
8881
8882 symtab_hdr = &elf_symtab_hdr (ibfd);
8883 locsymcount = symtab_hdr->sh_info;
8884 end_lgot_ents = lgot_ents + locsymcount;
8885 local_plt = (struct plt_entry **) end_lgot_ents;
8886 end_local_plt = local_plt + locsymcount;
8887 lgot_masks = (unsigned char *) end_local_plt;
8888 s = ppc64_elf_tdata (ibfd)->got;
8889 srel = ppc64_elf_tdata (ibfd)->relgot;
8890 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8891 {
8892 struct got_entry **pent, *ent;
8893
8894 pent = lgot_ents;
8895 while ((ent = *pent) != NULL)
8896 if (ent->got.refcount > 0)
8897 {
8898 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8899 {
8900 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8901 *pent = ent->next;
8902 }
8903 else
8904 {
8905 unsigned int num = 1;
8906 ent->got.offset = s->size;
8907 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8908 num = 2;
8909 s->size += num * 8;
8910 if (info->shared)
8911 srel->size += num * sizeof (Elf64_External_Rela);
8912 else if ((*lgot_masks & PLT_IFUNC) != 0)
8913 {
8914 htab->reliplt->size
8915 += num * sizeof (Elf64_External_Rela);
8916 htab->got_reli_size
8917 += num * sizeof (Elf64_External_Rela);
8918 }
8919 pent = &ent->next;
8920 }
8921 }
8922 else
8923 *pent = ent->next;
8924 }
8925
8926 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8927 for (; local_plt < end_local_plt; ++local_plt)
8928 {
8929 struct plt_entry *ent;
8930
8931 for (ent = *local_plt; ent != NULL; ent = ent->next)
8932 if (ent->plt.refcount > 0)
8933 {
8934 s = htab->iplt;
8935 ent->plt.offset = s->size;
8936 s->size += PLT_ENTRY_SIZE;
8937
8938 htab->reliplt->size += sizeof (Elf64_External_Rela);
8939 }
8940 else
8941 ent->plt.offset = (bfd_vma) -1;
8942 }
8943 }
8944
8945 /* Allocate global sym .plt and .got entries, and space for global
8946 sym dynamic relocs. */
8947 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8948
8949 first_tlsld = NULL;
8950 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8951 {
8952 struct got_entry *ent;
8953
8954 if (!is_ppc64_elf (ibfd))
8955 continue;
8956
8957 ent = ppc64_tlsld_got (ibfd);
8958 if (ent->got.refcount > 0)
8959 {
8960 if (!htab->do_multi_toc && first_tlsld != NULL)
8961 {
8962 ent->is_indirect = TRUE;
8963 ent->got.ent = first_tlsld;
8964 }
8965 else
8966 {
8967 if (first_tlsld == NULL)
8968 first_tlsld = ent;
8969 s = ppc64_elf_tdata (ibfd)->got;
8970 ent->got.offset = s->size;
8971 ent->owner = ibfd;
8972 s->size += 16;
8973 if (info->shared)
8974 {
8975 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8976 srel->size += sizeof (Elf64_External_Rela);
8977 }
8978 }
8979 }
8980 else
8981 ent->got.offset = (bfd_vma) -1;
8982 }
8983
8984 /* We now have determined the sizes of the various dynamic sections.
8985 Allocate memory for them. */
8986 relocs = FALSE;
8987 for (s = dynobj->sections; s != NULL; s = s->next)
8988 {
8989 if ((s->flags & SEC_LINKER_CREATED) == 0)
8990 continue;
8991
8992 if (s == htab->brlt || s == htab->relbrlt)
8993 /* These haven't been allocated yet; don't strip. */
8994 continue;
8995 else if (s == htab->got
8996 || s == htab->plt
8997 || s == htab->iplt
8998 || s == htab->glink
8999 || s == htab->dynbss)
9000 {
9001 /* Strip this section if we don't need it; see the
9002 comment below. */
9003 }
9004 else if (CONST_STRNEQ (s->name, ".rela"))
9005 {
9006 if (s->size != 0)
9007 {
9008 if (s != htab->relplt)
9009 relocs = TRUE;
9010
9011 /* We use the reloc_count field as a counter if we need
9012 to copy relocs into the output file. */
9013 s->reloc_count = 0;
9014 }
9015 }
9016 else
9017 {
9018 /* It's not one of our sections, so don't allocate space. */
9019 continue;
9020 }
9021
9022 if (s->size == 0)
9023 {
9024 /* If we don't need this section, strip it from the
9025 output file. This is mostly to handle .rela.bss and
9026 .rela.plt. We must create both sections in
9027 create_dynamic_sections, because they must be created
9028 before the linker maps input sections to output
9029 sections. The linker does that before
9030 adjust_dynamic_symbol is called, and it is that
9031 function which decides whether anything needs to go
9032 into these sections. */
9033 s->flags |= SEC_EXCLUDE;
9034 continue;
9035 }
9036
9037 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9038 continue;
9039
9040 /* Allocate memory for the section contents. We use bfd_zalloc
9041 here in case unused entries are not reclaimed before the
9042 section's contents are written out. This should not happen,
9043 but this way if it does we get a R_PPC64_NONE reloc in .rela
9044 sections instead of garbage.
9045 We also rely on the section contents being zero when writing
9046 the GOT. */
9047 s->contents = bfd_zalloc (dynobj, s->size);
9048 if (s->contents == NULL)
9049 return FALSE;
9050 }
9051
9052 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9053 {
9054 if (!is_ppc64_elf (ibfd))
9055 continue;
9056
9057 s = ppc64_elf_tdata (ibfd)->got;
9058 if (s != NULL && s != htab->got)
9059 {
9060 if (s->size == 0)
9061 s->flags |= SEC_EXCLUDE;
9062 else
9063 {
9064 s->contents = bfd_zalloc (ibfd, s->size);
9065 if (s->contents == NULL)
9066 return FALSE;
9067 }
9068 }
9069 s = ppc64_elf_tdata (ibfd)->relgot;
9070 if (s != NULL)
9071 {
9072 if (s->size == 0)
9073 s->flags |= SEC_EXCLUDE;
9074 else
9075 {
9076 s->contents = bfd_zalloc (ibfd, s->size);
9077 if (s->contents == NULL)
9078 return FALSE;
9079 relocs = TRUE;
9080 s->reloc_count = 0;
9081 }
9082 }
9083 }
9084
9085 if (htab->elf.dynamic_sections_created)
9086 {
9087 /* Add some entries to the .dynamic section. We fill in the
9088 values later, in ppc64_elf_finish_dynamic_sections, but we
9089 must add the entries now so that we get the correct size for
9090 the .dynamic section. The DT_DEBUG entry is filled in by the
9091 dynamic linker and used by the debugger. */
9092 #define add_dynamic_entry(TAG, VAL) \
9093 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9094
9095 if (info->executable)
9096 {
9097 if (!add_dynamic_entry (DT_DEBUG, 0))
9098 return FALSE;
9099 }
9100
9101 if (htab->plt != NULL && htab->plt->size != 0)
9102 {
9103 if (!add_dynamic_entry (DT_PLTGOT, 0)
9104 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9105 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9106 || !add_dynamic_entry (DT_JMPREL, 0)
9107 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9108 return FALSE;
9109 }
9110
9111 if (NO_OPD_RELOCS)
9112 {
9113 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9114 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9115 return FALSE;
9116 }
9117
9118 if (!htab->no_tls_get_addr_opt
9119 && htab->tls_get_addr_fd != NULL
9120 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9121 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9122 return FALSE;
9123
9124 if (relocs)
9125 {
9126 if (!add_dynamic_entry (DT_RELA, 0)
9127 || !add_dynamic_entry (DT_RELASZ, 0)
9128 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9129 return FALSE;
9130
9131 /* If any dynamic relocs apply to a read-only section,
9132 then we need a DT_TEXTREL entry. */
9133 if ((info->flags & DF_TEXTREL) == 0)
9134 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9135
9136 if ((info->flags & DF_TEXTREL) != 0)
9137 {
9138 if (!add_dynamic_entry (DT_TEXTREL, 0))
9139 return FALSE;
9140 }
9141 }
9142 }
9143 #undef add_dynamic_entry
9144
9145 return TRUE;
9146 }
9147
9148 /* Determine the type of stub needed, if any, for a call. */
9149
9150 static inline enum ppc_stub_type
9151 ppc_type_of_stub (asection *input_sec,
9152 const Elf_Internal_Rela *rel,
9153 struct ppc_link_hash_entry **hash,
9154 struct plt_entry **plt_ent,
9155 bfd_vma destination)
9156 {
9157 struct ppc_link_hash_entry *h = *hash;
9158 bfd_vma location;
9159 bfd_vma branch_offset;
9160 bfd_vma max_branch_offset;
9161 enum elf_ppc64_reloc_type r_type;
9162
9163 if (h != NULL)
9164 {
9165 struct plt_entry *ent;
9166 struct ppc_link_hash_entry *fdh = h;
9167 if (h->oh != NULL
9168 && h->oh->is_func_descriptor)
9169 {
9170 fdh = ppc_follow_link (h->oh);
9171 *hash = fdh;
9172 }
9173
9174 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9175 if (ent->addend == rel->r_addend
9176 && ent->plt.offset != (bfd_vma) -1)
9177 {
9178 *plt_ent = ent;
9179 return ppc_stub_plt_call;
9180 }
9181
9182 /* Here, we know we don't have a plt entry. If we don't have a
9183 either a defined function descriptor or a defined entry symbol
9184 in a regular object file, then it is pointless trying to make
9185 any other type of stub. */
9186 if (!is_static_defined (&fdh->elf)
9187 && !is_static_defined (&h->elf))
9188 return ppc_stub_none;
9189 }
9190 else if (elf_local_got_ents (input_sec->owner) != NULL)
9191 {
9192 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9193 struct plt_entry **local_plt = (struct plt_entry **)
9194 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9195 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9196
9197 if (local_plt[r_symndx] != NULL)
9198 {
9199 struct plt_entry *ent;
9200
9201 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9202 if (ent->addend == rel->r_addend
9203 && ent->plt.offset != (bfd_vma) -1)
9204 {
9205 *plt_ent = ent;
9206 return ppc_stub_plt_call;
9207 }
9208 }
9209 }
9210
9211 /* Determine where the call point is. */
9212 location = (input_sec->output_offset
9213 + input_sec->output_section->vma
9214 + rel->r_offset);
9215
9216 branch_offset = destination - location;
9217 r_type = ELF64_R_TYPE (rel->r_info);
9218
9219 /* Determine if a long branch stub is needed. */
9220 max_branch_offset = 1 << 25;
9221 if (r_type != R_PPC64_REL24)
9222 max_branch_offset = 1 << 15;
9223
9224 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9225 /* We need a stub. Figure out whether a long_branch or plt_branch
9226 is needed later. */
9227 return ppc_stub_long_branch;
9228
9229 return ppc_stub_none;
9230 }
9231
9232 /* Build a .plt call stub. */
9233
9234 static inline bfd_byte *
9235 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9236 {
9237 #define PPC_LO(v) ((v) & 0xffff)
9238 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9239 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9240
9241 if (PPC_HA (offset) != 0)
9242 {
9243 if (r != NULL)
9244 {
9245 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9246 r[1].r_offset = r[0].r_offset + 8;
9247 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9248 r[1].r_addend = r[0].r_addend;
9249 if (PPC_HA (offset + 16) != PPC_HA (offset))
9250 {
9251 r[2].r_offset = r[1].r_offset + 4;
9252 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9253 r[2].r_addend = r[0].r_addend;
9254 }
9255 else
9256 {
9257 r[2].r_offset = r[1].r_offset + 8;
9258 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9259 r[2].r_addend = r[0].r_addend + 8;
9260 r[3].r_offset = r[2].r_offset + 4;
9261 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9262 r[3].r_addend = r[0].r_addend + 16;
9263 }
9264 }
9265 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9266 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9267 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9268 if (PPC_HA (offset + 16) != PPC_HA (offset))
9269 {
9270 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9271 offset = 0;
9272 }
9273 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9274 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9275 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9276 bfd_put_32 (obfd, BCTR, p), p += 4;
9277 }
9278 else
9279 {
9280 if (r != NULL)
9281 {
9282 r[0].r_offset += 4;
9283 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9284 if (PPC_HA (offset + 16) != PPC_HA (offset))
9285 {
9286 r[1].r_offset = r[0].r_offset + 4;
9287 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9288 r[1].r_addend = r[0].r_addend;
9289 }
9290 else
9291 {
9292 r[1].r_offset = r[0].r_offset + 8;
9293 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9294 r[1].r_addend = r[0].r_addend + 16;
9295 r[2].r_offset = r[1].r_offset + 4;
9296 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9297 r[2].r_addend = r[0].r_addend + 8;
9298 }
9299 }
9300 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9301 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9302 if (PPC_HA (offset + 16) != PPC_HA (offset))
9303 {
9304 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9305 offset = 0;
9306 }
9307 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9308 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9309 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9310 bfd_put_32 (obfd, BCTR, p), p += 4;
9311 }
9312 return p;
9313 }
9314
9315 /* Build a special .plt call stub for __tls_get_addr. */
9316
9317 #define LD_R11_0R3 0xe9630000
9318 #define LD_R12_0R3 0xe9830000
9319 #define MR_R0_R3 0x7c601b78
9320 #define CMPDI_R11_0 0x2c2b0000
9321 #define ADD_R3_R12_R13 0x7c6c6a14
9322 #define BEQLR 0x4d820020
9323 #define MR_R3_R0 0x7c030378
9324 #define MFLR_R11 0x7d6802a6
9325 #define STD_R11_0R1 0xf9610000
9326 #define BCTRL 0x4e800421
9327 #define LD_R11_0R1 0xe9610000
9328 #define LD_R2_0R1 0xe8410000
9329 #define MTLR_R11 0x7d6803a6
9330
9331 static inline bfd_byte *
9332 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9333 Elf_Internal_Rela *r)
9334 {
9335 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9336 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9337 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9338 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9339 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9340 bfd_put_32 (obfd, BEQLR, p), p += 4;
9341 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9342 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9343 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9344
9345 if (r != NULL)
9346 r[0].r_offset += 9 * 4;
9347 p = build_plt_stub (obfd, p, offset, r);
9348 bfd_put_32 (obfd, BCTRL, p - 4);
9349
9350 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9351 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9352 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9353 bfd_put_32 (obfd, BLR, p), p += 4;
9354
9355 return p;
9356 }
9357
9358 static Elf_Internal_Rela *
9359 get_relocs (asection *sec, int count)
9360 {
9361 Elf_Internal_Rela *relocs;
9362 struct bfd_elf_section_data *elfsec_data;
9363
9364 elfsec_data = elf_section_data (sec);
9365 relocs = elfsec_data->relocs;
9366 if (relocs == NULL)
9367 {
9368 bfd_size_type relsize;
9369 relsize = sec->reloc_count * sizeof (*relocs);
9370 relocs = bfd_alloc (sec->owner, relsize);
9371 if (relocs == NULL)
9372 return NULL;
9373 elfsec_data->relocs = relocs;
9374 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9375 * sizeof (Elf64_External_Rela));
9376 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9377 sec->reloc_count = 0;
9378 }
9379 relocs += sec->reloc_count;
9380 sec->reloc_count += count;
9381 return relocs;
9382 }
9383
9384 static bfd_boolean
9385 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9386 {
9387 struct ppc_stub_hash_entry *stub_entry;
9388 struct ppc_branch_hash_entry *br_entry;
9389 struct bfd_link_info *info;
9390 struct ppc_link_hash_table *htab;
9391 bfd_byte *loc;
9392 bfd_byte *p;
9393 bfd_vma dest, off;
9394 int size;
9395 Elf_Internal_Rela *r;
9396 asection *plt;
9397
9398 /* Massage our args to the form they really have. */
9399 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9400 info = in_arg;
9401
9402 htab = ppc_hash_table (info);
9403 if (htab == NULL)
9404 return FALSE;
9405
9406 /* Make a note of the offset within the stubs for this entry. */
9407 stub_entry->stub_offset = stub_entry->stub_sec->size;
9408 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9409
9410 htab->stub_count[stub_entry->stub_type - 1] += 1;
9411 switch (stub_entry->stub_type)
9412 {
9413 case ppc_stub_long_branch:
9414 case ppc_stub_long_branch_r2off:
9415 /* Branches are relative. This is where we are going to. */
9416 off = dest = (stub_entry->target_value
9417 + stub_entry->target_section->output_offset
9418 + stub_entry->target_section->output_section->vma);
9419
9420 /* And this is where we are coming from. */
9421 off -= (stub_entry->stub_offset
9422 + stub_entry->stub_sec->output_offset
9423 + stub_entry->stub_sec->output_section->vma);
9424
9425 size = 4;
9426 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9427 {
9428 bfd_vma r2off;
9429
9430 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9431 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9432 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9433 loc += 4;
9434 size = 12;
9435 if (PPC_HA (r2off) != 0)
9436 {
9437 size = 16;
9438 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9439 loc += 4;
9440 }
9441 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9442 loc += 4;
9443 off -= size - 4;
9444 }
9445 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9446
9447 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9448 {
9449 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9450 stub_entry->root.string);
9451 htab->stub_error = TRUE;
9452 return FALSE;
9453 }
9454
9455 if (info->emitrelocations)
9456 {
9457 r = get_relocs (stub_entry->stub_sec, 1);
9458 if (r == NULL)
9459 return FALSE;
9460 r->r_offset = loc - stub_entry->stub_sec->contents;
9461 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9462 r->r_addend = dest;
9463 if (stub_entry->h != NULL)
9464 {
9465 struct elf_link_hash_entry **hashes;
9466 unsigned long symndx;
9467 struct ppc_link_hash_entry *h;
9468
9469 hashes = elf_sym_hashes (htab->stub_bfd);
9470 if (hashes == NULL)
9471 {
9472 bfd_size_type hsize;
9473
9474 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9475 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9476 if (hashes == NULL)
9477 return FALSE;
9478 elf_sym_hashes (htab->stub_bfd) = hashes;
9479 htab->stub_globals = 1;
9480 }
9481 symndx = htab->stub_globals++;
9482 h = stub_entry->h;
9483 hashes[symndx] = &h->elf;
9484 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9485 if (h->oh != NULL && h->oh->is_func)
9486 h = ppc_follow_link (h->oh);
9487 if (h->elf.root.u.def.section != stub_entry->target_section)
9488 /* H is an opd symbol. The addend must be zero. */
9489 r->r_addend = 0;
9490 else
9491 {
9492 off = (h->elf.root.u.def.value
9493 + h->elf.root.u.def.section->output_offset
9494 + h->elf.root.u.def.section->output_section->vma);
9495 r->r_addend -= off;
9496 }
9497 }
9498 }
9499 break;
9500
9501 case ppc_stub_plt_branch:
9502 case ppc_stub_plt_branch_r2off:
9503 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9504 stub_entry->root.string + 9,
9505 FALSE, FALSE);
9506 if (br_entry == NULL)
9507 {
9508 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9509 stub_entry->root.string);
9510 htab->stub_error = TRUE;
9511 return FALSE;
9512 }
9513
9514 dest = (stub_entry->target_value
9515 + stub_entry->target_section->output_offset
9516 + stub_entry->target_section->output_section->vma);
9517
9518 bfd_put_64 (htab->brlt->owner, dest,
9519 htab->brlt->contents + br_entry->offset);
9520
9521 if (br_entry->iter == htab->stub_iteration)
9522 {
9523 br_entry->iter = 0;
9524
9525 if (htab->relbrlt != NULL)
9526 {
9527 /* Create a reloc for the branch lookup table entry. */
9528 Elf_Internal_Rela rela;
9529 bfd_byte *rl;
9530
9531 rela.r_offset = (br_entry->offset
9532 + htab->brlt->output_offset
9533 + htab->brlt->output_section->vma);
9534 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9535 rela.r_addend = dest;
9536
9537 rl = htab->relbrlt->contents;
9538 rl += (htab->relbrlt->reloc_count++
9539 * sizeof (Elf64_External_Rela));
9540 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9541 }
9542 else if (info->emitrelocations)
9543 {
9544 r = get_relocs (htab->brlt, 1);
9545 if (r == NULL)
9546 return FALSE;
9547 /* brlt, being SEC_LINKER_CREATED does not go through the
9548 normal reloc processing. Symbols and offsets are not
9549 translated from input file to output file form, so
9550 set up the offset per the output file. */
9551 r->r_offset = (br_entry->offset
9552 + htab->brlt->output_offset
9553 + htab->brlt->output_section->vma);
9554 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9555 r->r_addend = dest;
9556 }
9557 }
9558
9559 dest = (br_entry->offset
9560 + htab->brlt->output_offset
9561 + htab->brlt->output_section->vma);
9562
9563 off = (dest
9564 - elf_gp (htab->brlt->output_section->owner)
9565 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9566
9567 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9568 {
9569 (*_bfd_error_handler)
9570 (_("linkage table error against `%s'"),
9571 stub_entry->root.string);
9572 bfd_set_error (bfd_error_bad_value);
9573 htab->stub_error = TRUE;
9574 return FALSE;
9575 }
9576
9577 if (info->emitrelocations)
9578 {
9579 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9580 if (r == NULL)
9581 return FALSE;
9582 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9583 if (bfd_big_endian (info->output_bfd))
9584 r[0].r_offset += 2;
9585 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9586 r[0].r_offset += 4;
9587 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9588 r[0].r_addend = dest;
9589 if (PPC_HA (off) != 0)
9590 {
9591 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9592 r[1].r_offset = r[0].r_offset + 4;
9593 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9594 r[1].r_addend = r[0].r_addend;
9595 }
9596 }
9597
9598 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9599 {
9600 if (PPC_HA (off) != 0)
9601 {
9602 size = 16;
9603 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9604 loc += 4;
9605 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9606 }
9607 else
9608 {
9609 size = 12;
9610 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9611 }
9612 }
9613 else
9614 {
9615 bfd_vma r2off;
9616
9617 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9618 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9619 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9620 loc += 4;
9621 size = 20;
9622 if (PPC_HA (off) != 0)
9623 {
9624 size += 4;
9625 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9626 loc += 4;
9627 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9628 loc += 4;
9629 }
9630 else
9631 {
9632 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9633 loc += 4;
9634 }
9635
9636 if (PPC_HA (r2off) != 0)
9637 {
9638 size += 4;
9639 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9640 loc += 4;
9641 }
9642 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9643 }
9644 loc += 4;
9645 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9646 loc += 4;
9647 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9648 break;
9649
9650 case ppc_stub_plt_call:
9651 if (stub_entry->h != NULL
9652 && stub_entry->h->is_func_descriptor
9653 && stub_entry->h->oh != NULL)
9654 {
9655 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9656
9657 /* If the old-ABI "dot-symbol" is undefined make it weak so
9658 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9659 FIXME: We used to define the symbol on one of the call
9660 stubs instead, which is why we test symbol section id
9661 against htab->top_id in various places. Likely all
9662 these checks could now disappear. */
9663 if (fh->elf.root.type == bfd_link_hash_undefined)
9664 fh->elf.root.type = bfd_link_hash_undefweak;
9665 }
9666
9667 /* Now build the stub. */
9668 dest = stub_entry->plt_ent->plt.offset & ~1;
9669 if (dest >= (bfd_vma) -2)
9670 abort ();
9671
9672 plt = htab->plt;
9673 if (!htab->elf.dynamic_sections_created
9674 || stub_entry->h == NULL
9675 || stub_entry->h->elf.dynindx == -1)
9676 plt = htab->iplt;
9677
9678 dest += plt->output_offset + plt->output_section->vma;
9679
9680 if (stub_entry->h == NULL
9681 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9682 {
9683 Elf_Internal_Rela rela;
9684 bfd_byte *rl;
9685
9686 rela.r_offset = dest;
9687 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9688 rela.r_addend = (stub_entry->target_value
9689 + stub_entry->target_section->output_offset
9690 + stub_entry->target_section->output_section->vma);
9691
9692 rl = (htab->reliplt->contents
9693 + (htab->reliplt->reloc_count++
9694 * sizeof (Elf64_External_Rela)));
9695 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9696 stub_entry->plt_ent->plt.offset |= 1;
9697 }
9698
9699 off = (dest
9700 - elf_gp (plt->output_section->owner)
9701 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9702
9703 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9704 {
9705 (*_bfd_error_handler)
9706 (_("linkage table error against `%s'"),
9707 stub_entry->h != NULL
9708 ? stub_entry->h->elf.root.root.string
9709 : "<local sym>");
9710 bfd_set_error (bfd_error_bad_value);
9711 htab->stub_error = TRUE;
9712 return FALSE;
9713 }
9714
9715 r = NULL;
9716 if (info->emitrelocations)
9717 {
9718 r = get_relocs (stub_entry->stub_sec,
9719 (2 + (PPC_HA (off) != 0)
9720 + (PPC_HA (off + 16) == PPC_HA (off))));
9721 if (r == NULL)
9722 return FALSE;
9723 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9724 if (bfd_big_endian (info->output_bfd))
9725 r[0].r_offset += 2;
9726 r[0].r_addend = dest;
9727 }
9728 if (stub_entry->h != NULL
9729 && (stub_entry->h == htab->tls_get_addr_fd
9730 || stub_entry->h == htab->tls_get_addr)
9731 && !htab->no_tls_get_addr_opt)
9732 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9733 else
9734 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9735 size = p - loc;
9736 break;
9737
9738 default:
9739 BFD_FAIL ();
9740 return FALSE;
9741 }
9742
9743 stub_entry->stub_sec->size += size;
9744
9745 if (htab->emit_stub_syms)
9746 {
9747 struct elf_link_hash_entry *h;
9748 size_t len1, len2;
9749 char *name;
9750 const char *const stub_str[] = { "long_branch",
9751 "long_branch_r2off",
9752 "plt_branch",
9753 "plt_branch_r2off",
9754 "plt_call" };
9755
9756 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9757 len2 = strlen (stub_entry->root.string);
9758 name = bfd_malloc (len1 + len2 + 2);
9759 if (name == NULL)
9760 return FALSE;
9761 memcpy (name, stub_entry->root.string, 9);
9762 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9763 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9764 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9765 if (h == NULL)
9766 return FALSE;
9767 if (h->root.type == bfd_link_hash_new)
9768 {
9769 h->root.type = bfd_link_hash_defined;
9770 h->root.u.def.section = stub_entry->stub_sec;
9771 h->root.u.def.value = stub_entry->stub_offset;
9772 h->ref_regular = 1;
9773 h->def_regular = 1;
9774 h->ref_regular_nonweak = 1;
9775 h->forced_local = 1;
9776 h->non_elf = 0;
9777 }
9778 }
9779
9780 return TRUE;
9781 }
9782
9783 /* As above, but don't actually build the stub. Just bump offset so
9784 we know stub section sizes, and select plt_branch stubs where
9785 long_branch stubs won't do. */
9786
9787 static bfd_boolean
9788 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9789 {
9790 struct ppc_stub_hash_entry *stub_entry;
9791 struct bfd_link_info *info;
9792 struct ppc_link_hash_table *htab;
9793 bfd_vma off;
9794 int size;
9795
9796 /* Massage our args to the form they really have. */
9797 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9798 info = in_arg;
9799
9800 htab = ppc_hash_table (info);
9801 if (htab == NULL)
9802 return FALSE;
9803
9804 if (stub_entry->stub_type == ppc_stub_plt_call)
9805 {
9806 asection *plt;
9807 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9808 if (off >= (bfd_vma) -2)
9809 abort ();
9810 plt = htab->plt;
9811 if (!htab->elf.dynamic_sections_created
9812 || stub_entry->h == NULL
9813 || stub_entry->h->elf.dynindx == -1)
9814 plt = htab->iplt;
9815 off += (plt->output_offset
9816 + plt->output_section->vma
9817 - elf_gp (plt->output_section->owner)
9818 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9819
9820 size = PLT_CALL_STUB_SIZE;
9821 if (PPC_HA (off) == 0)
9822 size -= 4;
9823 if (PPC_HA (off + 16) != PPC_HA (off))
9824 size += 4;
9825 if (stub_entry->h != NULL
9826 && (stub_entry->h == htab->tls_get_addr_fd
9827 || stub_entry->h == htab->tls_get_addr)
9828 && !htab->no_tls_get_addr_opt)
9829 size += 13 * 4;
9830 if (info->emitrelocations)
9831 {
9832 stub_entry->stub_sec->reloc_count
9833 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9834 stub_entry->stub_sec->flags |= SEC_RELOC;
9835 }
9836 }
9837 else
9838 {
9839 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9840 variants. */
9841 bfd_vma r2off = 0;
9842
9843 off = (stub_entry->target_value
9844 + stub_entry->target_section->output_offset
9845 + stub_entry->target_section->output_section->vma);
9846 off -= (stub_entry->stub_sec->size
9847 + stub_entry->stub_sec->output_offset
9848 + stub_entry->stub_sec->output_section->vma);
9849
9850 /* Reset the stub type from the plt variant in case we now
9851 can reach with a shorter stub. */
9852 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9853 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9854
9855 size = 4;
9856 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9857 {
9858 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9859 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9860 size = 12;
9861 if (PPC_HA (r2off) != 0)
9862 size = 16;
9863 off -= size - 4;
9864 }
9865
9866 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9867 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9868 {
9869 struct ppc_branch_hash_entry *br_entry;
9870
9871 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9872 stub_entry->root.string + 9,
9873 TRUE, FALSE);
9874 if (br_entry == NULL)
9875 {
9876 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9877 stub_entry->root.string);
9878 htab->stub_error = TRUE;
9879 return FALSE;
9880 }
9881
9882 if (br_entry->iter != htab->stub_iteration)
9883 {
9884 br_entry->iter = htab->stub_iteration;
9885 br_entry->offset = htab->brlt->size;
9886 htab->brlt->size += 8;
9887
9888 if (htab->relbrlt != NULL)
9889 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9890 else if (info->emitrelocations)
9891 {
9892 htab->brlt->reloc_count += 1;
9893 htab->brlt->flags |= SEC_RELOC;
9894 }
9895 }
9896
9897 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9898 off = (br_entry->offset
9899 + htab->brlt->output_offset
9900 + htab->brlt->output_section->vma
9901 - elf_gp (htab->brlt->output_section->owner)
9902 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9903
9904 if (info->emitrelocations)
9905 {
9906 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9907 stub_entry->stub_sec->flags |= SEC_RELOC;
9908 }
9909
9910 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9911 {
9912 size = 12;
9913 if (PPC_HA (off) != 0)
9914 size = 16;
9915 }
9916 else
9917 {
9918 size = 20;
9919 if (PPC_HA (off) != 0)
9920 size += 4;
9921
9922 if (PPC_HA (r2off) != 0)
9923 size += 4;
9924 }
9925 }
9926 else if (info->emitrelocations)
9927 {
9928 stub_entry->stub_sec->reloc_count += 1;
9929 stub_entry->stub_sec->flags |= SEC_RELOC;
9930 }
9931 }
9932
9933 stub_entry->stub_sec->size += size;
9934 return TRUE;
9935 }
9936
9937 /* Set up various things so that we can make a list of input sections
9938 for each output section included in the link. Returns -1 on error,
9939 0 when no stubs will be needed, and 1 on success. */
9940
9941 int
9942 ppc64_elf_setup_section_lists
9943 (struct bfd_link_info *info,
9944 asection *(*add_stub_section) (const char *, asection *),
9945 void (*layout_sections_again) (void))
9946 {
9947 bfd *input_bfd;
9948 int top_id, top_index, id;
9949 asection *section;
9950 asection **input_list;
9951 bfd_size_type amt;
9952 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9953
9954 if (htab == NULL)
9955 return -1;
9956 /* Stash our params away. */
9957 htab->add_stub_section = add_stub_section;
9958 htab->layout_sections_again = layout_sections_again;
9959
9960 if (htab->brlt == NULL)
9961 return 0;
9962
9963 /* Find the top input section id. */
9964 for (input_bfd = info->input_bfds, top_id = 3;
9965 input_bfd != NULL;
9966 input_bfd = input_bfd->link_next)
9967 {
9968 for (section = input_bfd->sections;
9969 section != NULL;
9970 section = section->next)
9971 {
9972 if (top_id < section->id)
9973 top_id = section->id;
9974 }
9975 }
9976
9977 htab->top_id = top_id;
9978 amt = sizeof (struct map_stub) * (top_id + 1);
9979 htab->stub_group = bfd_zmalloc (amt);
9980 if (htab->stub_group == NULL)
9981 return -1;
9982
9983 /* Set toc_off for com, und, abs and ind sections. */
9984 for (id = 0; id < 3; id++)
9985 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9986
9987 /* We can't use output_bfd->section_count here to find the top output
9988 section index as some sections may have been removed, and
9989 strip_excluded_output_sections doesn't renumber the indices. */
9990 for (section = info->output_bfd->sections, top_index = 0;
9991 section != NULL;
9992 section = section->next)
9993 {
9994 if (top_index < section->index)
9995 top_index = section->index;
9996 }
9997
9998 htab->top_index = top_index;
9999 amt = sizeof (asection *) * (top_index + 1);
10000 input_list = bfd_zmalloc (amt);
10001 htab->input_list = input_list;
10002 if (input_list == NULL)
10003 return -1;
10004
10005 return 1;
10006 }
10007
10008 /* Set up for first pass at multitoc partitioning. */
10009
10010 void
10011 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10012 {
10013 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10014
10015 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10016 htab->toc_curr = elf_gp (info->output_bfd);
10017 htab->toc_bfd = NULL;
10018 htab->toc_first_sec = NULL;
10019 }
10020
10021 /* The linker repeatedly calls this function for each TOC input section
10022 and linker generated GOT section. Group input bfds such that the toc
10023 within a group is less than 64k in size. */
10024
10025 bfd_boolean
10026 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10027 {
10028 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10029 bfd_vma addr, off, limit;
10030
10031 if (htab == NULL)
10032 return FALSE;
10033
10034 if (!htab->second_toc_pass)
10035 {
10036 /* Keep track of the first .toc or .got section for this input bfd. */
10037 if (htab->toc_bfd != isec->owner)
10038 {
10039 htab->toc_bfd = isec->owner;
10040 htab->toc_first_sec = isec;
10041 }
10042
10043 addr = isec->output_offset + isec->output_section->vma;
10044 off = addr - htab->toc_curr;
10045 limit = 0x80008000;
10046 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10047 limit = 0x10000;
10048 if (off + isec->size > limit)
10049 {
10050 addr = (htab->toc_first_sec->output_offset
10051 + htab->toc_first_sec->output_section->vma);
10052 htab->toc_curr = addr;
10053 }
10054
10055 /* toc_curr is the base address of this toc group. Set elf_gp
10056 for the input section to be the offset relative to the
10057 output toc base plus 0x8000. Making the input elf_gp an
10058 offset allows us to move the toc as a whole without
10059 recalculating input elf_gp. */
10060 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10061 off += TOC_BASE_OFF;
10062
10063 /* Die if someone uses a linker script that doesn't keep input
10064 file .toc and .got together. */
10065 if (elf_gp (isec->owner) != 0
10066 && elf_gp (isec->owner) != off)
10067 return FALSE;
10068
10069 elf_gp (isec->owner) = off;
10070 return TRUE;
10071 }
10072
10073 /* During the second pass toc_first_sec points to the start of
10074 a toc group, and toc_curr is used to track the old elf_gp.
10075 We use toc_bfd to ensure we only look at each bfd once. */
10076 if (htab->toc_bfd == isec->owner)
10077 return TRUE;
10078 htab->toc_bfd = isec->owner;
10079
10080 if (htab->toc_first_sec == NULL
10081 || htab->toc_curr != elf_gp (isec->owner))
10082 {
10083 htab->toc_curr = elf_gp (isec->owner);
10084 htab->toc_first_sec = isec;
10085 }
10086 addr = (htab->toc_first_sec->output_offset
10087 + htab->toc_first_sec->output_section->vma);
10088 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10089 elf_gp (isec->owner) = off;
10090
10091 return TRUE;
10092 }
10093
10094 /* Called via elf_link_hash_traverse to merge GOT entries for global
10095 symbol H. */
10096
10097 static bfd_boolean
10098 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10099 {
10100 if (h->root.type == bfd_link_hash_indirect)
10101 return TRUE;
10102
10103 if (h->root.type == bfd_link_hash_warning)
10104 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10105
10106 merge_got_entries (&h->got.glist);
10107
10108 return TRUE;
10109 }
10110
10111 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10112 symbol H. */
10113
10114 static bfd_boolean
10115 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10116 {
10117 struct got_entry *gent;
10118
10119 if (h->root.type == bfd_link_hash_indirect)
10120 return TRUE;
10121
10122 if (h->root.type == bfd_link_hash_warning)
10123 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10124
10125 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10126 if (!gent->is_indirect)
10127 allocate_got (h, (struct bfd_link_info *) inf, gent);
10128 return TRUE;
10129 }
10130
10131 /* Called on the first multitoc pass after the last call to
10132 ppc64_elf_next_toc_section. This function removes duplicate GOT
10133 entries. */
10134
10135 bfd_boolean
10136 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10137 {
10138 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10139 struct bfd *ibfd, *ibfd2;
10140 bfd_boolean done_something;
10141
10142 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10143
10144 if (!htab->do_multi_toc)
10145 return FALSE;
10146
10147 /* Merge global sym got entries within a toc group. */
10148 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10149
10150 /* And tlsld_got. */
10151 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10152 {
10153 struct got_entry *ent, *ent2;
10154
10155 if (!is_ppc64_elf (ibfd))
10156 continue;
10157
10158 ent = ppc64_tlsld_got (ibfd);
10159 if (!ent->is_indirect
10160 && ent->got.offset != (bfd_vma) -1)
10161 {
10162 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10163 {
10164 if (!is_ppc64_elf (ibfd2))
10165 continue;
10166
10167 ent2 = ppc64_tlsld_got (ibfd2);
10168 if (!ent2->is_indirect
10169 && ent2->got.offset != (bfd_vma) -1
10170 && elf_gp (ibfd2) == elf_gp (ibfd))
10171 {
10172 ent2->is_indirect = TRUE;
10173 ent2->got.ent = ent;
10174 }
10175 }
10176 }
10177 }
10178
10179 /* Zap sizes of got sections. */
10180 htab->reliplt->rawsize = htab->reliplt->size;
10181 htab->reliplt->size -= htab->got_reli_size;
10182 htab->got_reli_size = 0;
10183
10184 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10185 {
10186 asection *got, *relgot;
10187
10188 if (!is_ppc64_elf (ibfd))
10189 continue;
10190
10191 got = ppc64_elf_tdata (ibfd)->got;
10192 if (got != NULL)
10193 {
10194 got->rawsize = got->size;
10195 got->size = 0;
10196 relgot = ppc64_elf_tdata (ibfd)->relgot;
10197 relgot->rawsize = relgot->size;
10198 relgot->size = 0;
10199 }
10200 }
10201
10202 /* Now reallocate the got, local syms first. We don't need to
10203 allocate section contents again since we never increase size. */
10204 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10205 {
10206 struct got_entry **lgot_ents;
10207 struct got_entry **end_lgot_ents;
10208 struct plt_entry **local_plt;
10209 struct plt_entry **end_local_plt;
10210 unsigned char *lgot_masks;
10211 bfd_size_type locsymcount;
10212 Elf_Internal_Shdr *symtab_hdr;
10213 asection *s, *srel;
10214
10215 if (!is_ppc64_elf (ibfd))
10216 continue;
10217
10218 lgot_ents = elf_local_got_ents (ibfd);
10219 if (!lgot_ents)
10220 continue;
10221
10222 symtab_hdr = &elf_symtab_hdr (ibfd);
10223 locsymcount = symtab_hdr->sh_info;
10224 end_lgot_ents = lgot_ents + locsymcount;
10225 local_plt = (struct plt_entry **) end_lgot_ents;
10226 end_local_plt = local_plt + locsymcount;
10227 lgot_masks = (unsigned char *) end_local_plt;
10228 s = ppc64_elf_tdata (ibfd)->got;
10229 srel = ppc64_elf_tdata (ibfd)->relgot;
10230 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10231 {
10232 struct got_entry *ent;
10233
10234 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10235 {
10236 unsigned int num = 1;
10237 ent->got.offset = s->size;
10238 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10239 num = 2;
10240 s->size += num * 8;
10241 if (info->shared)
10242 srel->size += num * sizeof (Elf64_External_Rela);
10243 else if ((*lgot_masks & PLT_IFUNC) != 0)
10244 {
10245 htab->reliplt->size
10246 += num * sizeof (Elf64_External_Rela);
10247 htab->got_reli_size
10248 += num * sizeof (Elf64_External_Rela);
10249 }
10250 }
10251 }
10252 }
10253
10254 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10255
10256 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10257 {
10258 struct got_entry *ent;
10259
10260 if (!is_ppc64_elf (ibfd))
10261 continue;
10262
10263 ent = ppc64_tlsld_got (ibfd);
10264 if (!ent->is_indirect
10265 && ent->got.offset != (bfd_vma) -1)
10266 {
10267 asection *s = ppc64_elf_tdata (ibfd)->got;
10268 ent->got.offset = s->size;
10269 s->size += 16;
10270 if (info->shared)
10271 {
10272 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10273 srel->size += sizeof (Elf64_External_Rela);
10274 }
10275 }
10276 }
10277
10278 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10279 if (!done_something)
10280 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10281 {
10282 asection *got;
10283
10284 if (!is_ppc64_elf (ibfd))
10285 continue;
10286
10287 got = ppc64_elf_tdata (ibfd)->got;
10288 if (got != NULL)
10289 {
10290 done_something = got->rawsize != got->size;
10291 if (done_something)
10292 break;
10293 }
10294 }
10295
10296 if (done_something)
10297 (*htab->layout_sections_again) ();
10298
10299 /* Set up for second pass over toc sections to recalculate elf_gp
10300 on input sections. */
10301 htab->toc_bfd = NULL;
10302 htab->toc_first_sec = NULL;
10303 htab->second_toc_pass = TRUE;
10304 return done_something;
10305 }
10306
10307 /* Called after second pass of multitoc partitioning. */
10308
10309 void
10310 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10311 {
10312 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10313
10314 /* After the second pass, toc_curr tracks the TOC offset used
10315 for code sections below in ppc64_elf_next_input_section. */
10316 htab->toc_curr = TOC_BASE_OFF;
10317 }
10318
10319 /* No toc references were found in ISEC. If the code in ISEC makes no
10320 calls, then there's no need to use toc adjusting stubs when branching
10321 into ISEC. Actually, indirect calls from ISEC are OK as they will
10322 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10323 needed, and 2 if a cyclical call-graph was found but no other reason
10324 for a stub was detected. If called from the top level, a return of
10325 2 means the same as a return of 0. */
10326
10327 static int
10328 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10329 {
10330 int ret;
10331
10332 /* Mark this section as checked. */
10333 isec->call_check_done = 1;
10334
10335 /* We know none of our code bearing sections will need toc stubs. */
10336 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10337 return 0;
10338
10339 if (isec->size == 0)
10340 return 0;
10341
10342 if (isec->output_section == NULL)
10343 return 0;
10344
10345 ret = 0;
10346 if (isec->reloc_count != 0)
10347 {
10348 Elf_Internal_Rela *relstart, *rel;
10349 Elf_Internal_Sym *local_syms;
10350 struct ppc_link_hash_table *htab;
10351
10352 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10353 info->keep_memory);
10354 if (relstart == NULL)
10355 return -1;
10356
10357 /* Look for branches to outside of this section. */
10358 local_syms = NULL;
10359 htab = ppc_hash_table (info);
10360 if (htab == NULL)
10361 return -1;
10362
10363 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10364 {
10365 enum elf_ppc64_reloc_type r_type;
10366 unsigned long r_symndx;
10367 struct elf_link_hash_entry *h;
10368 struct ppc_link_hash_entry *eh;
10369 Elf_Internal_Sym *sym;
10370 asection *sym_sec;
10371 struct _opd_sec_data *opd;
10372 bfd_vma sym_value;
10373 bfd_vma dest;
10374
10375 r_type = ELF64_R_TYPE (rel->r_info);
10376 if (r_type != R_PPC64_REL24
10377 && r_type != R_PPC64_REL14
10378 && r_type != R_PPC64_REL14_BRTAKEN
10379 && r_type != R_PPC64_REL14_BRNTAKEN)
10380 continue;
10381
10382 r_symndx = ELF64_R_SYM (rel->r_info);
10383 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10384 isec->owner))
10385 {
10386 ret = -1;
10387 break;
10388 }
10389
10390 /* Calls to dynamic lib functions go through a plt call stub
10391 that uses r2. */
10392 eh = (struct ppc_link_hash_entry *) h;
10393 if (eh != NULL
10394 && (eh->elf.plt.plist != NULL
10395 || (eh->oh != NULL
10396 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10397 {
10398 ret = 1;
10399 break;
10400 }
10401
10402 if (sym_sec == NULL)
10403 /* Ignore other undefined symbols. */
10404 continue;
10405
10406 /* Assume branches to other sections not included in the
10407 link need stubs too, to cover -R and absolute syms. */
10408 if (sym_sec->output_section == NULL)
10409 {
10410 ret = 1;
10411 break;
10412 }
10413
10414 if (h == NULL)
10415 sym_value = sym->st_value;
10416 else
10417 {
10418 if (h->root.type != bfd_link_hash_defined
10419 && h->root.type != bfd_link_hash_defweak)
10420 abort ();
10421 sym_value = h->root.u.def.value;
10422 }
10423 sym_value += rel->r_addend;
10424
10425 /* If this branch reloc uses an opd sym, find the code section. */
10426 opd = get_opd_info (sym_sec);
10427 if (opd != NULL)
10428 {
10429 if (h == NULL && opd->adjust != NULL)
10430 {
10431 long adjust;
10432
10433 adjust = opd->adjust[sym->st_value / 8];
10434 if (adjust == -1)
10435 /* Assume deleted functions won't ever be called. */
10436 continue;
10437 sym_value += adjust;
10438 }
10439
10440 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10441 if (dest == (bfd_vma) -1)
10442 continue;
10443 }
10444 else
10445 dest = (sym_value
10446 + sym_sec->output_offset
10447 + sym_sec->output_section->vma);
10448
10449 /* Ignore branch to self. */
10450 if (sym_sec == isec)
10451 continue;
10452
10453 /* If the called function uses the toc, we need a stub. */
10454 if (sym_sec->has_toc_reloc
10455 || sym_sec->makes_toc_func_call)
10456 {
10457 ret = 1;
10458 break;
10459 }
10460
10461 /* Assume any branch that needs a long branch stub might in fact
10462 need a plt_branch stub. A plt_branch stub uses r2. */
10463 else if (dest - (isec->output_offset
10464 + isec->output_section->vma
10465 + rel->r_offset) + (1 << 25) >= (2 << 25))
10466 {
10467 ret = 1;
10468 break;
10469 }
10470
10471 /* If calling back to a section in the process of being
10472 tested, we can't say for sure that no toc adjusting stubs
10473 are needed, so don't return zero. */
10474 else if (sym_sec->call_check_in_progress)
10475 ret = 2;
10476
10477 /* Branches to another section that itself doesn't have any TOC
10478 references are OK. Recursively call ourselves to check. */
10479 else if (!sym_sec->call_check_done)
10480 {
10481 int recur;
10482
10483 /* Mark current section as indeterminate, so that other
10484 sections that call back to current won't be marked as
10485 known. */
10486 isec->call_check_in_progress = 1;
10487 recur = toc_adjusting_stub_needed (info, sym_sec);
10488 isec->call_check_in_progress = 0;
10489
10490 if (recur != 0)
10491 {
10492 ret = recur;
10493 if (recur != 2)
10494 break;
10495 }
10496 }
10497 }
10498
10499 if (local_syms != NULL
10500 && (elf_symtab_hdr (isec->owner).contents
10501 != (unsigned char *) local_syms))
10502 free (local_syms);
10503 if (elf_section_data (isec)->relocs != relstart)
10504 free (relstart);
10505 }
10506
10507 if ((ret & 1) == 0
10508 && isec->map_head.s != NULL
10509 && (strcmp (isec->output_section->name, ".init") == 0
10510 || strcmp (isec->output_section->name, ".fini") == 0))
10511 {
10512 if (isec->map_head.s->has_toc_reloc
10513 || isec->map_head.s->makes_toc_func_call)
10514 ret = 1;
10515 else if (!isec->map_head.s->call_check_done)
10516 {
10517 int recur;
10518 isec->call_check_in_progress = 1;
10519 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10520 isec->call_check_in_progress = 0;
10521 if (recur != 0)
10522 ret = recur;
10523 }
10524 }
10525
10526 if (ret == 1)
10527 isec->makes_toc_func_call = 1;
10528
10529 return ret;
10530 }
10531
10532 /* The linker repeatedly calls this function for each input section,
10533 in the order that input sections are linked into output sections.
10534 Build lists of input sections to determine groupings between which
10535 we may insert linker stubs. */
10536
10537 bfd_boolean
10538 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10539 {
10540 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10541
10542 if (htab == NULL)
10543 return FALSE;
10544
10545 if ((isec->output_section->flags & SEC_CODE) != 0
10546 && isec->output_section->index <= htab->top_index)
10547 {
10548 asection **list = htab->input_list + isec->output_section->index;
10549 /* Steal the link_sec pointer for our list. */
10550 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10551 /* This happens to make the list in reverse order,
10552 which is what we want. */
10553 PREV_SEC (isec) = *list;
10554 *list = isec;
10555 }
10556
10557 if (htab->multi_toc_needed)
10558 {
10559 /* If a code section has a function that uses the TOC then we need
10560 to use the right TOC (obviously). Also, make sure that .opd gets
10561 the correct TOC value for R_PPC64_TOC relocs that don't have or
10562 can't find their function symbol (shouldn't ever happen now).
10563 Also specially treat .fixup for the linux kernel. .fixup
10564 contains branches, but only back to the function that hit an
10565 exception. */
10566 if (isec->has_toc_reloc
10567 || (isec->flags & SEC_CODE) == 0
10568 || strcmp (isec->name, ".fixup") == 0)
10569 {
10570 if (elf_gp (isec->owner) != 0)
10571 htab->toc_curr = elf_gp (isec->owner);
10572 }
10573 else if (!isec->call_check_done
10574 && toc_adjusting_stub_needed (info, isec) < 0)
10575 return FALSE;
10576 }
10577
10578 /* Functions that don't use the TOC can belong in any TOC group.
10579 Use the last TOC base. This happens to make _init and _fini
10580 pasting work, because the fragments generally don't use the TOC. */
10581 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10582 return TRUE;
10583 }
10584
10585 /* Check that all .init and .fini sections use the same toc, if they
10586 have toc relocs. */
10587
10588 static bfd_boolean
10589 check_pasted_section (struct bfd_link_info *info, const char *name)
10590 {
10591 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10592
10593 if (o != NULL)
10594 {
10595 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10596 bfd_vma toc_off = 0;
10597 asection *i;
10598
10599 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10600 if (i->has_toc_reloc)
10601 {
10602 if (toc_off == 0)
10603 toc_off = htab->stub_group[i->id].toc_off;
10604 else if (toc_off != htab->stub_group[i->id].toc_off)
10605 return FALSE;
10606 }
10607 /* Make sure the whole pasted function uses the same toc offset. */
10608 if (toc_off != 0)
10609 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10610 htab->stub_group[i->id].toc_off = toc_off;
10611 }
10612 return TRUE;
10613 }
10614
10615 bfd_boolean
10616 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10617 {
10618 return (check_pasted_section (info, ".init")
10619 & check_pasted_section (info, ".fini"));
10620 }
10621
10622 /* See whether we can group stub sections together. Grouping stub
10623 sections may result in fewer stubs. More importantly, we need to
10624 put all .init* and .fini* stubs at the beginning of the .init or
10625 .fini output sections respectively, because glibc splits the
10626 _init and _fini functions into multiple parts. Putting a stub in
10627 the middle of a function is not a good idea. */
10628
10629 static void
10630 group_sections (struct ppc_link_hash_table *htab,
10631 bfd_size_type stub_group_size,
10632 bfd_boolean stubs_always_before_branch)
10633 {
10634 asection **list;
10635 bfd_size_type stub14_group_size;
10636 bfd_boolean suppress_size_errors;
10637
10638 suppress_size_errors = FALSE;
10639 stub14_group_size = stub_group_size;
10640 if (stub_group_size == 1)
10641 {
10642 /* Default values. */
10643 if (stubs_always_before_branch)
10644 {
10645 stub_group_size = 0x1e00000;
10646 stub14_group_size = 0x7800;
10647 }
10648 else
10649 {
10650 stub_group_size = 0x1c00000;
10651 stub14_group_size = 0x7000;
10652 }
10653 suppress_size_errors = TRUE;
10654 }
10655
10656 list = htab->input_list + htab->top_index;
10657 do
10658 {
10659 asection *tail = *list;
10660 while (tail != NULL)
10661 {
10662 asection *curr;
10663 asection *prev;
10664 bfd_size_type total;
10665 bfd_boolean big_sec;
10666 bfd_vma curr_toc;
10667
10668 curr = tail;
10669 total = tail->size;
10670 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10671 && ppc64_elf_section_data (tail)->has_14bit_branch
10672 ? stub14_group_size : stub_group_size);
10673 if (big_sec && !suppress_size_errors)
10674 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10675 tail->owner, tail);
10676 curr_toc = htab->stub_group[tail->id].toc_off;
10677
10678 while ((prev = PREV_SEC (curr)) != NULL
10679 && ((total += curr->output_offset - prev->output_offset)
10680 < (ppc64_elf_section_data (prev) != NULL
10681 && ppc64_elf_section_data (prev)->has_14bit_branch
10682 ? stub14_group_size : stub_group_size))
10683 && htab->stub_group[prev->id].toc_off == curr_toc)
10684 curr = prev;
10685
10686 /* OK, the size from the start of CURR to the end is less
10687 than stub_group_size and thus can be handled by one stub
10688 section. (or the tail section is itself larger than
10689 stub_group_size, in which case we may be toast.) We
10690 should really be keeping track of the total size of stubs
10691 added here, as stubs contribute to the final output
10692 section size. That's a little tricky, and this way will
10693 only break if stubs added make the total size more than
10694 2^25, ie. for the default stub_group_size, if stubs total
10695 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10696 do
10697 {
10698 prev = PREV_SEC (tail);
10699 /* Set up this stub group. */
10700 htab->stub_group[tail->id].link_sec = curr;
10701 }
10702 while (tail != curr && (tail = prev) != NULL);
10703
10704 /* But wait, there's more! Input sections up to stub_group_size
10705 bytes before the stub section can be handled by it too.
10706 Don't do this if we have a really large section after the
10707 stubs, as adding more stubs increases the chance that
10708 branches may not reach into the stub section. */
10709 if (!stubs_always_before_branch && !big_sec)
10710 {
10711 total = 0;
10712 while (prev != NULL
10713 && ((total += tail->output_offset - prev->output_offset)
10714 < (ppc64_elf_section_data (prev) != NULL
10715 && ppc64_elf_section_data (prev)->has_14bit_branch
10716 ? stub14_group_size : stub_group_size))
10717 && htab->stub_group[prev->id].toc_off == curr_toc)
10718 {
10719 tail = prev;
10720 prev = PREV_SEC (tail);
10721 htab->stub_group[tail->id].link_sec = curr;
10722 }
10723 }
10724 tail = prev;
10725 }
10726 }
10727 while (list-- != htab->input_list);
10728 free (htab->input_list);
10729 #undef PREV_SEC
10730 }
10731
10732 /* Determine and set the size of the stub section for a final link.
10733
10734 The basic idea here is to examine all the relocations looking for
10735 PC-relative calls to a target that is unreachable with a "bl"
10736 instruction. */
10737
10738 bfd_boolean
10739 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10740 {
10741 bfd_size_type stub_group_size;
10742 bfd_boolean stubs_always_before_branch;
10743 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10744
10745 if (htab == NULL)
10746 return FALSE;
10747
10748 stubs_always_before_branch = group_size < 0;
10749 if (group_size < 0)
10750 stub_group_size = -group_size;
10751 else
10752 stub_group_size = group_size;
10753
10754 group_sections (htab, stub_group_size, stubs_always_before_branch);
10755
10756 while (1)
10757 {
10758 bfd *input_bfd;
10759 unsigned int bfd_indx;
10760 asection *stub_sec;
10761
10762 htab->stub_iteration += 1;
10763
10764 for (input_bfd = info->input_bfds, bfd_indx = 0;
10765 input_bfd != NULL;
10766 input_bfd = input_bfd->link_next, bfd_indx++)
10767 {
10768 Elf_Internal_Shdr *symtab_hdr;
10769 asection *section;
10770 Elf_Internal_Sym *local_syms = NULL;
10771
10772 if (!is_ppc64_elf (input_bfd))
10773 continue;
10774
10775 /* We'll need the symbol table in a second. */
10776 symtab_hdr = &elf_symtab_hdr (input_bfd);
10777 if (symtab_hdr->sh_info == 0)
10778 continue;
10779
10780 /* Walk over each section attached to the input bfd. */
10781 for (section = input_bfd->sections;
10782 section != NULL;
10783 section = section->next)
10784 {
10785 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10786
10787 /* If there aren't any relocs, then there's nothing more
10788 to do. */
10789 if ((section->flags & SEC_RELOC) == 0
10790 || (section->flags & SEC_ALLOC) == 0
10791 || (section->flags & SEC_LOAD) == 0
10792 || (section->flags & SEC_CODE) == 0
10793 || section->reloc_count == 0)
10794 continue;
10795
10796 /* If this section is a link-once section that will be
10797 discarded, then don't create any stubs. */
10798 if (section->output_section == NULL
10799 || section->output_section->owner != info->output_bfd)
10800 continue;
10801
10802 /* Get the relocs. */
10803 internal_relocs
10804 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10805 info->keep_memory);
10806 if (internal_relocs == NULL)
10807 goto error_ret_free_local;
10808
10809 /* Now examine each relocation. */
10810 irela = internal_relocs;
10811 irelaend = irela + section->reloc_count;
10812 for (; irela < irelaend; irela++)
10813 {
10814 enum elf_ppc64_reloc_type r_type;
10815 unsigned int r_indx;
10816 enum ppc_stub_type stub_type;
10817 struct ppc_stub_hash_entry *stub_entry;
10818 asection *sym_sec, *code_sec;
10819 bfd_vma sym_value, code_value;
10820 bfd_vma destination;
10821 bfd_boolean ok_dest;
10822 struct ppc_link_hash_entry *hash;
10823 struct ppc_link_hash_entry *fdh;
10824 struct elf_link_hash_entry *h;
10825 Elf_Internal_Sym *sym;
10826 char *stub_name;
10827 const asection *id_sec;
10828 struct _opd_sec_data *opd;
10829 struct plt_entry *plt_ent;
10830
10831 r_type = ELF64_R_TYPE (irela->r_info);
10832 r_indx = ELF64_R_SYM (irela->r_info);
10833
10834 if (r_type >= R_PPC64_max)
10835 {
10836 bfd_set_error (bfd_error_bad_value);
10837 goto error_ret_free_internal;
10838 }
10839
10840 /* Only look for stubs on branch instructions. */
10841 if (r_type != R_PPC64_REL24
10842 && r_type != R_PPC64_REL14
10843 && r_type != R_PPC64_REL14_BRTAKEN
10844 && r_type != R_PPC64_REL14_BRNTAKEN)
10845 continue;
10846
10847 /* Now determine the call target, its name, value,
10848 section. */
10849 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10850 r_indx, input_bfd))
10851 goto error_ret_free_internal;
10852 hash = (struct ppc_link_hash_entry *) h;
10853
10854 ok_dest = FALSE;
10855 fdh = NULL;
10856 sym_value = 0;
10857 if (hash == NULL)
10858 {
10859 sym_value = sym->st_value;
10860 ok_dest = TRUE;
10861 }
10862 else if (hash->elf.root.type == bfd_link_hash_defined
10863 || hash->elf.root.type == bfd_link_hash_defweak)
10864 {
10865 sym_value = hash->elf.root.u.def.value;
10866 if (sym_sec->output_section != NULL)
10867 ok_dest = TRUE;
10868 }
10869 else if (hash->elf.root.type == bfd_link_hash_undefweak
10870 || hash->elf.root.type == bfd_link_hash_undefined)
10871 {
10872 /* Recognise an old ABI func code entry sym, and
10873 use the func descriptor sym instead if it is
10874 defined. */
10875 if (hash->elf.root.root.string[0] == '.'
10876 && (fdh = lookup_fdh (hash, htab)) != NULL)
10877 {
10878 if (fdh->elf.root.type == bfd_link_hash_defined
10879 || fdh->elf.root.type == bfd_link_hash_defweak)
10880 {
10881 sym_sec = fdh->elf.root.u.def.section;
10882 sym_value = fdh->elf.root.u.def.value;
10883 if (sym_sec->output_section != NULL)
10884 ok_dest = TRUE;
10885 }
10886 else
10887 fdh = NULL;
10888 }
10889 }
10890 else
10891 {
10892 bfd_set_error (bfd_error_bad_value);
10893 goto error_ret_free_internal;
10894 }
10895
10896 destination = 0;
10897 if (ok_dest)
10898 {
10899 sym_value += irela->r_addend;
10900 destination = (sym_value
10901 + sym_sec->output_offset
10902 + sym_sec->output_section->vma);
10903 }
10904
10905 code_sec = sym_sec;
10906 code_value = sym_value;
10907 opd = get_opd_info (sym_sec);
10908 if (opd != NULL)
10909 {
10910 bfd_vma dest;
10911
10912 if (hash == NULL && opd->adjust != NULL)
10913 {
10914 long adjust = opd->adjust[sym_value / 8];
10915 if (adjust == -1)
10916 continue;
10917 code_value += adjust;
10918 sym_value += adjust;
10919 }
10920 dest = opd_entry_value (sym_sec, sym_value,
10921 &code_sec, &code_value);
10922 if (dest != (bfd_vma) -1)
10923 {
10924 destination = dest;
10925 if (fdh != NULL)
10926 {
10927 /* Fixup old ABI sym to point at code
10928 entry. */
10929 hash->elf.root.type = bfd_link_hash_defweak;
10930 hash->elf.root.u.def.section = code_sec;
10931 hash->elf.root.u.def.value = code_value;
10932 }
10933 }
10934 }
10935
10936 /* Determine what (if any) linker stub is needed. */
10937 plt_ent = NULL;
10938 stub_type = ppc_type_of_stub (section, irela, &hash,
10939 &plt_ent, destination);
10940
10941 if (stub_type != ppc_stub_plt_call)
10942 {
10943 /* Check whether we need a TOC adjusting stub.
10944 Since the linker pastes together pieces from
10945 different object files when creating the
10946 _init and _fini functions, it may be that a
10947 call to what looks like a local sym is in
10948 fact a call needing a TOC adjustment. */
10949 if (code_sec != NULL
10950 && code_sec->output_section != NULL
10951 && (htab->stub_group[code_sec->id].toc_off
10952 != htab->stub_group[section->id].toc_off)
10953 && (code_sec->has_toc_reloc
10954 || code_sec->makes_toc_func_call))
10955 stub_type = ppc_stub_long_branch_r2off;
10956 }
10957
10958 if (stub_type == ppc_stub_none)
10959 continue;
10960
10961 /* __tls_get_addr calls might be eliminated. */
10962 if (stub_type != ppc_stub_plt_call
10963 && hash != NULL
10964 && (hash == htab->tls_get_addr
10965 || hash == htab->tls_get_addr_fd)
10966 && section->has_tls_reloc
10967 && irela != internal_relocs)
10968 {
10969 /* Get tls info. */
10970 unsigned char *tls_mask;
10971
10972 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10973 irela - 1, input_bfd))
10974 goto error_ret_free_internal;
10975 if (*tls_mask != 0)
10976 continue;
10977 }
10978
10979 /* Support for grouping stub sections. */
10980 id_sec = htab->stub_group[section->id].link_sec;
10981
10982 /* Get the name of this stub. */
10983 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10984 if (!stub_name)
10985 goto error_ret_free_internal;
10986
10987 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10988 stub_name, FALSE, FALSE);
10989 if (stub_entry != NULL)
10990 {
10991 /* The proper stub has already been created. */
10992 free (stub_name);
10993 continue;
10994 }
10995
10996 stub_entry = ppc_add_stub (stub_name, section, htab);
10997 if (stub_entry == NULL)
10998 {
10999 free (stub_name);
11000 error_ret_free_internal:
11001 if (elf_section_data (section)->relocs == NULL)
11002 free (internal_relocs);
11003 error_ret_free_local:
11004 if (local_syms != NULL
11005 && (symtab_hdr->contents
11006 != (unsigned char *) local_syms))
11007 free (local_syms);
11008 return FALSE;
11009 }
11010
11011 stub_entry->stub_type = stub_type;
11012 if (stub_type != ppc_stub_plt_call)
11013 {
11014 stub_entry->target_value = code_value;
11015 stub_entry->target_section = code_sec;
11016 }
11017 else
11018 {
11019 stub_entry->target_value = sym_value;
11020 stub_entry->target_section = sym_sec;
11021 }
11022 stub_entry->h = hash;
11023 stub_entry->plt_ent = plt_ent;
11024 stub_entry->addend = irela->r_addend;
11025
11026 if (stub_entry->h != NULL)
11027 htab->stub_globals += 1;
11028 }
11029
11030 /* We're done with the internal relocs, free them. */
11031 if (elf_section_data (section)->relocs != internal_relocs)
11032 free (internal_relocs);
11033 }
11034
11035 if (local_syms != NULL
11036 && symtab_hdr->contents != (unsigned char *) local_syms)
11037 {
11038 if (!info->keep_memory)
11039 free (local_syms);
11040 else
11041 symtab_hdr->contents = (unsigned char *) local_syms;
11042 }
11043 }
11044
11045 /* We may have added some stubs. Find out the new size of the
11046 stub sections. */
11047 for (stub_sec = htab->stub_bfd->sections;
11048 stub_sec != NULL;
11049 stub_sec = stub_sec->next)
11050 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11051 {
11052 stub_sec->rawsize = stub_sec->size;
11053 stub_sec->size = 0;
11054 stub_sec->reloc_count = 0;
11055 stub_sec->flags &= ~SEC_RELOC;
11056 }
11057
11058 htab->brlt->size = 0;
11059 htab->brlt->reloc_count = 0;
11060 htab->brlt->flags &= ~SEC_RELOC;
11061 if (htab->relbrlt != NULL)
11062 htab->relbrlt->size = 0;
11063
11064 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11065
11066 if (info->emitrelocations
11067 && htab->glink != NULL && htab->glink->size != 0)
11068 {
11069 htab->glink->reloc_count = 1;
11070 htab->glink->flags |= SEC_RELOC;
11071 }
11072
11073 for (stub_sec = htab->stub_bfd->sections;
11074 stub_sec != NULL;
11075 stub_sec = stub_sec->next)
11076 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11077 && stub_sec->rawsize != stub_sec->size)
11078 break;
11079
11080 /* Exit from this loop when no stubs have been added, and no stubs
11081 have changed size. */
11082 if (stub_sec == NULL)
11083 break;
11084
11085 /* Ask the linker to do its stuff. */
11086 (*htab->layout_sections_again) ();
11087 }
11088
11089 /* It would be nice to strip htab->brlt from the output if the
11090 section is empty, but it's too late. If we strip sections here,
11091 the dynamic symbol table is corrupted since the section symbol
11092 for the stripped section isn't written. */
11093
11094 return TRUE;
11095 }
11096
11097 /* Called after we have determined section placement. If sections
11098 move, we'll be called again. Provide a value for TOCstart. */
11099
11100 bfd_vma
11101 ppc64_elf_toc (bfd *obfd)
11102 {
11103 asection *s;
11104 bfd_vma TOCstart;
11105
11106 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11107 order. The TOC starts where the first of these sections starts. */
11108 s = bfd_get_section_by_name (obfd, ".got");
11109 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11110 s = bfd_get_section_by_name (obfd, ".toc");
11111 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11112 s = bfd_get_section_by_name (obfd, ".tocbss");
11113 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11114 s = bfd_get_section_by_name (obfd, ".plt");
11115 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11116 {
11117 /* This may happen for
11118 o references to TOC base (SYM@toc / TOC[tc0]) without a
11119 .toc directive
11120 o bad linker script
11121 o --gc-sections and empty TOC sections
11122
11123 FIXME: Warn user? */
11124
11125 /* Look for a likely section. We probably won't even be
11126 using TOCstart. */
11127 for (s = obfd->sections; s != NULL; s = s->next)
11128 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11129 | SEC_EXCLUDE))
11130 == (SEC_ALLOC | SEC_SMALL_DATA))
11131 break;
11132 if (s == NULL)
11133 for (s = obfd->sections; s != NULL; s = s->next)
11134 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | 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_READONLY | SEC_EXCLUDE))
11140 == SEC_ALLOC)
11141 break;
11142 if (s == NULL)
11143 for (s = obfd->sections; s != NULL; s = s->next)
11144 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11145 break;
11146 }
11147
11148 TOCstart = 0;
11149 if (s != NULL)
11150 TOCstart = s->output_section->vma + s->output_offset;
11151
11152 return TOCstart;
11153 }
11154
11155 /* Build all the stubs associated with the current output file.
11156 The stubs are kept in a hash table attached to the main linker
11157 hash table. This function is called via gldelf64ppc_finish. */
11158
11159 bfd_boolean
11160 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11161 struct bfd_link_info *info,
11162 char **stats)
11163 {
11164 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11165 asection *stub_sec;
11166 bfd_byte *p;
11167 int stub_sec_count = 0;
11168
11169 if (htab == NULL)
11170 return FALSE;
11171
11172 htab->emit_stub_syms = emit_stub_syms;
11173
11174 /* Allocate memory to hold the linker stubs. */
11175 for (stub_sec = htab->stub_bfd->sections;
11176 stub_sec != NULL;
11177 stub_sec = stub_sec->next)
11178 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11179 && stub_sec->size != 0)
11180 {
11181 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11182 if (stub_sec->contents == NULL)
11183 return FALSE;
11184 /* We want to check that built size is the same as calculated
11185 size. rawsize is a convenient location to use. */
11186 stub_sec->rawsize = stub_sec->size;
11187 stub_sec->size = 0;
11188 }
11189
11190 if (htab->glink != NULL && htab->glink->size != 0)
11191 {
11192 unsigned int indx;
11193 bfd_vma plt0;
11194
11195 /* Build the .glink plt call stub. */
11196 if (htab->emit_stub_syms)
11197 {
11198 struct elf_link_hash_entry *h;
11199 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11200 TRUE, FALSE, FALSE);
11201 if (h == NULL)
11202 return FALSE;
11203 if (h->root.type == bfd_link_hash_new)
11204 {
11205 h->root.type = bfd_link_hash_defined;
11206 h->root.u.def.section = htab->glink;
11207 h->root.u.def.value = 8;
11208 h->ref_regular = 1;
11209 h->def_regular = 1;
11210 h->ref_regular_nonweak = 1;
11211 h->forced_local = 1;
11212 h->non_elf = 0;
11213 }
11214 }
11215 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11216 if (info->emitrelocations)
11217 {
11218 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11219 if (r == NULL)
11220 return FALSE;
11221 r->r_offset = (htab->glink->output_offset
11222 + htab->glink->output_section->vma);
11223 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11224 r->r_addend = plt0;
11225 }
11226 p = htab->glink->contents;
11227 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11228 bfd_put_64 (htab->glink->owner, plt0, p);
11229 p += 8;
11230 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11231 p += 4;
11232 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11233 p += 4;
11234 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11235 p += 4;
11236 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11237 p += 4;
11238 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11239 p += 4;
11240 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11241 p += 4;
11242 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11243 p += 4;
11244 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11245 p += 4;
11246 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11247 p += 4;
11248 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11249 p += 4;
11250 bfd_put_32 (htab->glink->owner, BCTR, p);
11251 p += 4;
11252 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11253 {
11254 bfd_put_32 (htab->glink->owner, NOP, p);
11255 p += 4;
11256 }
11257
11258 /* Build the .glink lazy link call stubs. */
11259 indx = 0;
11260 while (p < htab->glink->contents + htab->glink->size)
11261 {
11262 if (indx < 0x8000)
11263 {
11264 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11265 p += 4;
11266 }
11267 else
11268 {
11269 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11270 p += 4;
11271 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11272 p += 4;
11273 }
11274 bfd_put_32 (htab->glink->owner,
11275 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11276 indx++;
11277 p += 4;
11278 }
11279 htab->glink->rawsize = p - htab->glink->contents;
11280 }
11281
11282 if (htab->brlt->size != 0)
11283 {
11284 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11285 htab->brlt->size);
11286 if (htab->brlt->contents == NULL)
11287 return FALSE;
11288 }
11289 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11290 {
11291 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11292 htab->relbrlt->size);
11293 if (htab->relbrlt->contents == NULL)
11294 return FALSE;
11295 }
11296
11297 /* Build the stubs as directed by the stub hash table. */
11298 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11299
11300 if (htab->relbrlt != NULL)
11301 htab->relbrlt->reloc_count = 0;
11302
11303 for (stub_sec = htab->stub_bfd->sections;
11304 stub_sec != NULL;
11305 stub_sec = stub_sec->next)
11306 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11307 {
11308 stub_sec_count += 1;
11309 if (stub_sec->rawsize != stub_sec->size)
11310 break;
11311 }
11312
11313 if (stub_sec != NULL
11314 || htab->glink->rawsize != htab->glink->size)
11315 {
11316 htab->stub_error = TRUE;
11317 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11318 }
11319
11320 if (htab->stub_error)
11321 return FALSE;
11322
11323 if (stats != NULL)
11324 {
11325 *stats = bfd_malloc (500);
11326 if (*stats == NULL)
11327 return FALSE;
11328
11329 sprintf (*stats, _("linker stubs in %u group%s\n"
11330 " branch %lu\n"
11331 " toc adjust %lu\n"
11332 " long branch %lu\n"
11333 " long toc adj %lu\n"
11334 " plt call %lu"),
11335 stub_sec_count,
11336 stub_sec_count == 1 ? "" : "s",
11337 htab->stub_count[ppc_stub_long_branch - 1],
11338 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11339 htab->stub_count[ppc_stub_plt_branch - 1],
11340 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11341 htab->stub_count[ppc_stub_plt_call - 1]);
11342 }
11343 return TRUE;
11344 }
11345
11346 /* This function undoes the changes made by add_symbol_adjust. */
11347
11348 static bfd_boolean
11349 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11350 {
11351 struct ppc_link_hash_entry *eh;
11352
11353 if (h->root.type == bfd_link_hash_indirect)
11354 return TRUE;
11355
11356 if (h->root.type == bfd_link_hash_warning)
11357 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11358
11359 eh = (struct ppc_link_hash_entry *) h;
11360 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11361 return TRUE;
11362
11363 eh->elf.root.type = bfd_link_hash_undefined;
11364 return TRUE;
11365 }
11366
11367 void
11368 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11369 {
11370 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11371
11372 if (htab != NULL)
11373 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11374 }
11375
11376 /* What to do when ld finds relocations against symbols defined in
11377 discarded sections. */
11378
11379 static unsigned int
11380 ppc64_elf_action_discarded (asection *sec)
11381 {
11382 if (strcmp (".opd", sec->name) == 0)
11383 return 0;
11384
11385 if (strcmp (".toc", sec->name) == 0)
11386 return 0;
11387
11388 if (strcmp (".toc1", sec->name) == 0)
11389 return 0;
11390
11391 return _bfd_elf_default_action_discarded (sec);
11392 }
11393
11394 /* REL points to a low-part reloc on a largetoc instruction sequence.
11395 Find the matching high-part reloc instruction and verify that it
11396 is addis REG,r2,x. If so, return a pointer to the high-part reloc. */
11397
11398 static const Elf_Internal_Rela *
11399 ha_reloc_match (const Elf_Internal_Rela *relocs,
11400 const Elf_Internal_Rela *rel,
11401 unsigned int reg,
11402 const bfd *input_bfd,
11403 const bfd_byte *contents)
11404 {
11405 enum elf_ppc64_reloc_type r_type, r_type_ha;
11406 bfd_vma r_info_ha, r_addend;
11407
11408 r_type = ELF64_R_TYPE (rel->r_info);
11409 switch (r_type)
11410 {
11411 case R_PPC64_GOT_TLSLD16_LO:
11412 case R_PPC64_GOT_TLSGD16_LO:
11413 case R_PPC64_GOT_TPREL16_LO_DS:
11414 case R_PPC64_GOT_DTPREL16_LO_DS:
11415 case R_PPC64_GOT16_LO:
11416 case R_PPC64_TOC16_LO:
11417 r_type_ha = r_type + 2;
11418 break;
11419 case R_PPC64_GOT16_LO_DS:
11420 r_type_ha = R_PPC64_GOT16_HA;
11421 break;
11422 case R_PPC64_TOC16_LO_DS:
11423 r_type_ha = R_PPC64_TOC16_HA;
11424 break;
11425 default:
11426 abort ();
11427 }
11428 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11429 r_addend = rel->r_addend;
11430
11431 while (--rel >= relocs)
11432 if (rel->r_info == r_info_ha
11433 && rel->r_addend == r_addend)
11434 {
11435 const bfd_byte *p = contents + (rel->r_offset & ~3);
11436 unsigned int insn = bfd_get_32 (input_bfd, p);
11437 if ((insn & ((0x3f << 26) | (0x1f << 16)))
11438 == ((15u << 26) | (2 << 16)) /* addis rt,r2,x */
11439 && (insn & (0x1f << 21)) == (reg << 21))
11440 return rel;
11441 break;
11442 }
11443 return NULL;
11444 }
11445
11446 /* The RELOCATE_SECTION function is called by the ELF backend linker
11447 to handle the relocations for a section.
11448
11449 The relocs are always passed as Rela structures; if the section
11450 actually uses Rel structures, the r_addend field will always be
11451 zero.
11452
11453 This function is responsible for adjust the section contents as
11454 necessary, and (if using Rela relocs and generating a
11455 relocatable output file) adjusting the reloc addend as
11456 necessary.
11457
11458 This function does not have to worry about setting the reloc
11459 address or the reloc symbol index.
11460
11461 LOCAL_SYMS is a pointer to the swapped in local symbols.
11462
11463 LOCAL_SECTIONS is an array giving the section in the input file
11464 corresponding to the st_shndx field of each local symbol.
11465
11466 The global hash table entry for the global symbols can be found
11467 via elf_sym_hashes (input_bfd).
11468
11469 When generating relocatable output, this function must handle
11470 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11471 going to be the section symbol corresponding to the output
11472 section, which means that the addend must be adjusted
11473 accordingly. */
11474
11475 static bfd_boolean
11476 ppc64_elf_relocate_section (bfd *output_bfd,
11477 struct bfd_link_info *info,
11478 bfd *input_bfd,
11479 asection *input_section,
11480 bfd_byte *contents,
11481 Elf_Internal_Rela *relocs,
11482 Elf_Internal_Sym *local_syms,
11483 asection **local_sections)
11484 {
11485 struct ppc_link_hash_table *htab;
11486 Elf_Internal_Shdr *symtab_hdr;
11487 struct elf_link_hash_entry **sym_hashes;
11488 Elf_Internal_Rela *rel;
11489 Elf_Internal_Rela *relend;
11490 Elf_Internal_Rela outrel;
11491 bfd_byte *loc;
11492 struct got_entry **local_got_ents;
11493 bfd_vma TOCstart;
11494 bfd_boolean ret = TRUE;
11495 bfd_boolean is_opd;
11496 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11497 bfd_boolean is_power4 = FALSE;
11498 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11499
11500 /* Initialize howto table if needed. */
11501 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11502 ppc_howto_init ();
11503
11504 htab = ppc_hash_table (info);
11505 if (htab == NULL)
11506 return FALSE;
11507
11508 /* Don't relocate stub sections. */
11509 if (input_section->owner == htab->stub_bfd)
11510 return TRUE;
11511
11512 BFD_ASSERT (is_ppc64_elf (input_bfd));
11513
11514 local_got_ents = elf_local_got_ents (input_bfd);
11515 TOCstart = elf_gp (output_bfd);
11516 symtab_hdr = &elf_symtab_hdr (input_bfd);
11517 sym_hashes = elf_sym_hashes (input_bfd);
11518 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11519
11520 rel = relocs;
11521 relend = relocs + input_section->reloc_count;
11522 for (; rel < relend; rel++)
11523 {
11524 enum elf_ppc64_reloc_type r_type;
11525 bfd_vma addend, orig_addend;
11526 bfd_reloc_status_type r;
11527 Elf_Internal_Sym *sym;
11528 asection *sec;
11529 struct elf_link_hash_entry *h_elf;
11530 struct ppc_link_hash_entry *h;
11531 struct ppc_link_hash_entry *fdh;
11532 const char *sym_name;
11533 unsigned long r_symndx, toc_symndx;
11534 bfd_vma toc_addend;
11535 unsigned char tls_mask, tls_gd, tls_type;
11536 unsigned char sym_type;
11537 bfd_vma relocation;
11538 bfd_boolean unresolved_reloc;
11539 bfd_boolean warned;
11540 unsigned int insn;
11541 bfd_vma mask;
11542 struct ppc_stub_hash_entry *stub_entry;
11543 bfd_vma max_br_offset;
11544 bfd_vma from;
11545
11546 r_type = ELF64_R_TYPE (rel->r_info);
11547 r_symndx = ELF64_R_SYM (rel->r_info);
11548
11549 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11550 symbol of the previous ADDR64 reloc. The symbol gives us the
11551 proper TOC base to use. */
11552 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11553 && rel != relocs
11554 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11555 && is_opd)
11556 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11557
11558 sym = NULL;
11559 sec = NULL;
11560 h_elf = NULL;
11561 sym_name = NULL;
11562 unresolved_reloc = FALSE;
11563 warned = FALSE;
11564 orig_addend = rel->r_addend;
11565
11566 if (r_symndx < symtab_hdr->sh_info)
11567 {
11568 /* It's a local symbol. */
11569 struct _opd_sec_data *opd;
11570
11571 sym = local_syms + r_symndx;
11572 sec = local_sections[r_symndx];
11573 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11574 sym_type = ELF64_ST_TYPE (sym->st_info);
11575 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11576 opd = get_opd_info (sec);
11577 if (opd != NULL && opd->adjust != NULL)
11578 {
11579 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11580 if (adjust == -1)
11581 relocation = 0;
11582 else
11583 {
11584 /* If this is a relocation against the opd section sym
11585 and we have edited .opd, adjust the reloc addend so
11586 that ld -r and ld --emit-relocs output is correct.
11587 If it is a reloc against some other .opd symbol,
11588 then the symbol value will be adjusted later. */
11589 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11590 rel->r_addend += adjust;
11591 else
11592 relocation += adjust;
11593 }
11594 }
11595 }
11596 else
11597 {
11598 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11599 r_symndx, symtab_hdr, sym_hashes,
11600 h_elf, sec, relocation,
11601 unresolved_reloc, warned);
11602 sym_name = h_elf->root.root.string;
11603 sym_type = h_elf->type;
11604 }
11605 h = (struct ppc_link_hash_entry *) h_elf;
11606
11607 if (sec != NULL && elf_discarded_section (sec))
11608 {
11609 /* For relocs against symbols from removed linkonce sections,
11610 or sections discarded by a linker script, we just want the
11611 section contents zeroed. Avoid any special processing. */
11612 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
11613 contents + rel->r_offset);
11614 rel->r_info = 0;
11615 rel->r_addend = 0;
11616 continue;
11617 }
11618
11619 if (info->relocatable)
11620 continue;
11621
11622 /* TLS optimizations. Replace instruction sequences and relocs
11623 based on information we collected in tls_optimize. We edit
11624 RELOCS so that --emit-relocs will output something sensible
11625 for the final instruction stream. */
11626 tls_mask = 0;
11627 tls_gd = 0;
11628 toc_symndx = 0;
11629 if (h != NULL)
11630 tls_mask = h->tls_mask;
11631 else if (local_got_ents != NULL)
11632 {
11633 struct plt_entry **local_plt = (struct plt_entry **)
11634 (local_got_ents + symtab_hdr->sh_info);
11635 unsigned char *lgot_masks = (unsigned char *)
11636 (local_plt + symtab_hdr->sh_info);
11637 tls_mask = lgot_masks[r_symndx];
11638 }
11639 if (tls_mask == 0
11640 && (r_type == R_PPC64_TLS
11641 || r_type == R_PPC64_TLSGD
11642 || r_type == R_PPC64_TLSLD))
11643 {
11644 /* Check for toc tls entries. */
11645 unsigned char *toc_tls;
11646
11647 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11648 &local_syms, rel, input_bfd))
11649 return FALSE;
11650
11651 if (toc_tls)
11652 tls_mask = *toc_tls;
11653 }
11654
11655 /* Check that tls relocs are used with tls syms, and non-tls
11656 relocs are used with non-tls syms. */
11657 if (r_symndx != 0
11658 && r_type != R_PPC64_NONE
11659 && (h == NULL
11660 || h->elf.root.type == bfd_link_hash_defined
11661 || h->elf.root.type == bfd_link_hash_defweak)
11662 && (IS_PPC64_TLS_RELOC (r_type)
11663 != (sym_type == STT_TLS
11664 || (sym_type == STT_SECTION
11665 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11666 {
11667 if (tls_mask != 0
11668 && (r_type == R_PPC64_TLS
11669 || r_type == R_PPC64_TLSGD
11670 || r_type == R_PPC64_TLSLD))
11671 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11672 ;
11673 else
11674 (*_bfd_error_handler)
11675 (!IS_PPC64_TLS_RELOC (r_type)
11676 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11677 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11678 input_bfd,
11679 input_section,
11680 (long) rel->r_offset,
11681 ppc64_elf_howto_table[r_type]->name,
11682 sym_name);
11683 }
11684
11685 /* Ensure reloc mapping code below stays sane. */
11686 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11687 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11688 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11689 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11690 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11691 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11692 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11693 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11694 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11695 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11696 abort ();
11697
11698 switch (r_type)
11699 {
11700 default:
11701 break;
11702
11703 case R_PPC64_LO_DS_OPT:
11704 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11705 if ((insn & (0x3f << 26)) != 58u << 26)
11706 abort ();
11707 insn += (14u << 26) - (58u << 26);
11708 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11709 r_type = R_PPC64_TOC16_LO;
11710 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11711 break;
11712
11713 case R_PPC64_TOC16:
11714 case R_PPC64_TOC16_LO:
11715 case R_PPC64_TOC16_DS:
11716 case R_PPC64_TOC16_LO_DS:
11717 {
11718 /* Check for toc tls entries. */
11719 unsigned char *toc_tls;
11720 int retval;
11721
11722 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11723 &local_syms, rel, input_bfd);
11724 if (retval == 0)
11725 return FALSE;
11726
11727 if (toc_tls)
11728 {
11729 tls_mask = *toc_tls;
11730 if (r_type == R_PPC64_TOC16_DS
11731 || r_type == R_PPC64_TOC16_LO_DS)
11732 {
11733 if (tls_mask != 0
11734 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11735 goto toctprel;
11736 }
11737 else
11738 {
11739 /* If we found a GD reloc pair, then we might be
11740 doing a GD->IE transition. */
11741 if (retval == 2)
11742 {
11743 tls_gd = TLS_TPRELGD;
11744 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11745 goto tls_ldgd_opt;
11746 }
11747 else if (retval == 3)
11748 {
11749 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11750 goto tls_ldgd_opt;
11751 }
11752 }
11753 }
11754 }
11755 break;
11756
11757 case R_PPC64_GOT_TPREL16_HI:
11758 case R_PPC64_GOT_TPREL16_HA:
11759 if (tls_mask != 0
11760 && (tls_mask & TLS_TPREL) == 0)
11761 {
11762 rel->r_offset -= d_offset;
11763 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11764 r_type = R_PPC64_NONE;
11765 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11766 }
11767 break;
11768
11769 case R_PPC64_GOT_TPREL16_DS:
11770 case R_PPC64_GOT_TPREL16_LO_DS:
11771 if (tls_mask != 0
11772 && (tls_mask & TLS_TPREL) == 0)
11773 {
11774 toctprel:
11775 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11776 insn &= 31 << 21;
11777 insn |= 0x3c0d0000; /* addis 0,13,0 */
11778 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11779 r_type = R_PPC64_TPREL16_HA;
11780 if (toc_symndx != 0)
11781 {
11782 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11783 rel->r_addend = toc_addend;
11784 /* We changed the symbol. Start over in order to
11785 get h, sym, sec etc. right. */
11786 rel--;
11787 continue;
11788 }
11789 else
11790 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11791 }
11792 break;
11793
11794 case R_PPC64_TLS:
11795 if (tls_mask != 0
11796 && (tls_mask & TLS_TPREL) == 0)
11797 {
11798 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11799 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11800 if (insn == 0)
11801 abort ();
11802 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11803 /* Was PPC64_TLS which sits on insn boundary, now
11804 PPC64_TPREL16_LO which is at low-order half-word. */
11805 rel->r_offset += d_offset;
11806 r_type = R_PPC64_TPREL16_LO;
11807 if (toc_symndx != 0)
11808 {
11809 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11810 rel->r_addend = toc_addend;
11811 /* We changed the symbol. Start over in order to
11812 get h, sym, sec etc. right. */
11813 rel--;
11814 continue;
11815 }
11816 else
11817 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11818 }
11819 break;
11820
11821 case R_PPC64_GOT_TLSGD16_HI:
11822 case R_PPC64_GOT_TLSGD16_HA:
11823 tls_gd = TLS_TPRELGD;
11824 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11825 goto tls_gdld_hi;
11826 break;
11827
11828 case R_PPC64_GOT_TLSLD16_HI:
11829 case R_PPC64_GOT_TLSLD16_HA:
11830 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11831 {
11832 tls_gdld_hi:
11833 if ((tls_mask & tls_gd) != 0)
11834 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11835 + R_PPC64_GOT_TPREL16_DS);
11836 else
11837 {
11838 rel->r_offset -= d_offset;
11839 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11840 r_type = R_PPC64_NONE;
11841 }
11842 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11843 }
11844 break;
11845
11846 case R_PPC64_GOT_TLSGD16:
11847 case R_PPC64_GOT_TLSGD16_LO:
11848 tls_gd = TLS_TPRELGD;
11849 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11850 goto tls_ldgd_opt;
11851 break;
11852
11853 case R_PPC64_GOT_TLSLD16:
11854 case R_PPC64_GOT_TLSLD16_LO:
11855 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11856 {
11857 unsigned int insn1, insn2, insn3;
11858 bfd_vma offset;
11859
11860 tls_ldgd_opt:
11861 offset = (bfd_vma) -1;
11862 /* If not using the newer R_PPC64_TLSGD/LD to mark
11863 __tls_get_addr calls, we must trust that the call
11864 stays with its arg setup insns, ie. that the next
11865 reloc is the __tls_get_addr call associated with
11866 the current reloc. Edit both insns. */
11867 if (input_section->has_tls_get_addr_call
11868 && rel + 1 < relend
11869 && branch_reloc_hash_match (input_bfd, rel + 1,
11870 htab->tls_get_addr,
11871 htab->tls_get_addr_fd))
11872 offset = rel[1].r_offset;
11873 if ((tls_mask & tls_gd) != 0)
11874 {
11875 /* IE */
11876 insn1 = bfd_get_32 (output_bfd,
11877 contents + rel->r_offset - d_offset);
11878 insn1 &= (1 << 26) - (1 << 2);
11879 insn1 |= 58 << 26; /* ld */
11880 insn2 = 0x7c636a14; /* add 3,3,13 */
11881 if (offset != (bfd_vma) -1)
11882 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11883 if ((tls_mask & TLS_EXPLICIT) == 0)
11884 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11885 + R_PPC64_GOT_TPREL16_DS);
11886 else
11887 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11888 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11889 }
11890 else
11891 {
11892 /* LE */
11893 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11894 insn2 = 0x38630000; /* addi 3,3,0 */
11895 if (tls_gd == 0)
11896 {
11897 /* Was an LD reloc. */
11898 if (toc_symndx)
11899 sec = local_sections[toc_symndx];
11900 for (r_symndx = 0;
11901 r_symndx < symtab_hdr->sh_info;
11902 r_symndx++)
11903 if (local_sections[r_symndx] == sec)
11904 break;
11905 if (r_symndx >= symtab_hdr->sh_info)
11906 r_symndx = 0;
11907 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11908 if (r_symndx != 0)
11909 rel->r_addend -= (local_syms[r_symndx].st_value
11910 + sec->output_offset
11911 + sec->output_section->vma);
11912 }
11913 else if (toc_symndx != 0)
11914 {
11915 r_symndx = toc_symndx;
11916 rel->r_addend = toc_addend;
11917 }
11918 r_type = R_PPC64_TPREL16_HA;
11919 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11920 if (offset != (bfd_vma) -1)
11921 {
11922 rel[1].r_info = ELF64_R_INFO (r_symndx,
11923 R_PPC64_TPREL16_LO);
11924 rel[1].r_offset = offset + d_offset;
11925 rel[1].r_addend = rel->r_addend;
11926 }
11927 }
11928 bfd_put_32 (output_bfd, insn1,
11929 contents + rel->r_offset - d_offset);
11930 if (offset != (bfd_vma) -1)
11931 {
11932 insn3 = bfd_get_32 (output_bfd,
11933 contents + offset + 4);
11934 if (insn3 == NOP
11935 || insn3 == CROR_151515 || insn3 == CROR_313131)
11936 {
11937 rel[1].r_offset += 4;
11938 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11939 insn2 = NOP;
11940 }
11941 bfd_put_32 (output_bfd, insn2, contents + offset);
11942 }
11943 if ((tls_mask & tls_gd) == 0
11944 && (tls_gd == 0 || toc_symndx != 0))
11945 {
11946 /* We changed the symbol. Start over in order
11947 to get h, sym, sec etc. right. */
11948 rel--;
11949 continue;
11950 }
11951 }
11952 break;
11953
11954 case R_PPC64_TLSGD:
11955 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11956 {
11957 unsigned int insn2, insn3;
11958 bfd_vma offset = rel->r_offset;
11959
11960 if ((tls_mask & TLS_TPRELGD) != 0)
11961 {
11962 /* IE */
11963 r_type = R_PPC64_NONE;
11964 insn2 = 0x7c636a14; /* add 3,3,13 */
11965 }
11966 else
11967 {
11968 /* LE */
11969 if (toc_symndx != 0)
11970 {
11971 r_symndx = toc_symndx;
11972 rel->r_addend = toc_addend;
11973 }
11974 r_type = R_PPC64_TPREL16_LO;
11975 rel->r_offset = offset + d_offset;
11976 insn2 = 0x38630000; /* addi 3,3,0 */
11977 }
11978 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11979 /* Zap the reloc on the _tls_get_addr call too. */
11980 BFD_ASSERT (offset == rel[1].r_offset);
11981 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11982 insn3 = bfd_get_32 (output_bfd,
11983 contents + offset + 4);
11984 if (insn3 == NOP
11985 || insn3 == CROR_151515 || insn3 == CROR_313131)
11986 {
11987 rel->r_offset += 4;
11988 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11989 insn2 = NOP;
11990 }
11991 bfd_put_32 (output_bfd, insn2, contents + offset);
11992 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11993 {
11994 rel--;
11995 continue;
11996 }
11997 }
11998 break;
11999
12000 case R_PPC64_TLSLD:
12001 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12002 {
12003 unsigned int insn2, insn3;
12004 bfd_vma offset = rel->r_offset;
12005
12006 if (toc_symndx)
12007 sec = local_sections[toc_symndx];
12008 for (r_symndx = 0;
12009 r_symndx < symtab_hdr->sh_info;
12010 r_symndx++)
12011 if (local_sections[r_symndx] == sec)
12012 break;
12013 if (r_symndx >= symtab_hdr->sh_info)
12014 r_symndx = 0;
12015 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12016 if (r_symndx != 0)
12017 rel->r_addend -= (local_syms[r_symndx].st_value
12018 + sec->output_offset
12019 + sec->output_section->vma);
12020
12021 r_type = R_PPC64_TPREL16_LO;
12022 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12023 rel->r_offset = offset + d_offset;
12024 /* Zap the reloc on the _tls_get_addr call too. */
12025 BFD_ASSERT (offset == rel[1].r_offset);
12026 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12027 insn2 = 0x38630000; /* addi 3,3,0 */
12028 insn3 = bfd_get_32 (output_bfd,
12029 contents + offset + 4);
12030 if (insn3 == NOP
12031 || insn3 == CROR_151515 || insn3 == CROR_313131)
12032 {
12033 rel->r_offset += 4;
12034 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12035 insn2 = NOP;
12036 }
12037 bfd_put_32 (output_bfd, insn2, contents + offset);
12038 rel--;
12039 continue;
12040 }
12041 break;
12042
12043 case R_PPC64_DTPMOD64:
12044 if (rel + 1 < relend
12045 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12046 && rel[1].r_offset == rel->r_offset + 8)
12047 {
12048 if ((tls_mask & TLS_GD) == 0)
12049 {
12050 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12051 if ((tls_mask & TLS_TPRELGD) != 0)
12052 r_type = R_PPC64_TPREL64;
12053 else
12054 {
12055 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12056 r_type = R_PPC64_NONE;
12057 }
12058 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12059 }
12060 }
12061 else
12062 {
12063 if ((tls_mask & TLS_LD) == 0)
12064 {
12065 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12066 r_type = R_PPC64_NONE;
12067 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12068 }
12069 }
12070 break;
12071
12072 case R_PPC64_TPREL64:
12073 if ((tls_mask & TLS_TPREL) == 0)
12074 {
12075 r_type = R_PPC64_NONE;
12076 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12077 }
12078 break;
12079 }
12080
12081 /* Handle other relocations that tweak non-addend part of insn. */
12082 insn = 0;
12083 max_br_offset = 1 << 25;
12084 addend = rel->r_addend;
12085 switch (r_type)
12086 {
12087 default:
12088 break;
12089
12090 /* Branch taken prediction relocations. */
12091 case R_PPC64_ADDR14_BRTAKEN:
12092 case R_PPC64_REL14_BRTAKEN:
12093 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12094 /* Fall thru. */
12095
12096 /* Branch not taken prediction relocations. */
12097 case R_PPC64_ADDR14_BRNTAKEN:
12098 case R_PPC64_REL14_BRNTAKEN:
12099 insn |= bfd_get_32 (output_bfd,
12100 contents + rel->r_offset) & ~(0x01 << 21);
12101 /* Fall thru. */
12102
12103 case R_PPC64_REL14:
12104 max_br_offset = 1 << 15;
12105 /* Fall thru. */
12106
12107 case R_PPC64_REL24:
12108 /* Calls to functions with a different TOC, such as calls to
12109 shared objects, need to alter the TOC pointer. This is
12110 done using a linkage stub. A REL24 branching to these
12111 linkage stubs needs to be followed by a nop, as the nop
12112 will be replaced with an instruction to restore the TOC
12113 base pointer. */
12114 fdh = h;
12115 if (h != NULL
12116 && h->oh != NULL
12117 && h->oh->is_func_descriptor)
12118 fdh = ppc_follow_link (h->oh);
12119 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12120 if (stub_entry != NULL
12121 && (stub_entry->stub_type == ppc_stub_plt_call
12122 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12123 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12124 {
12125 bfd_boolean can_plt_call = FALSE;
12126
12127 if (rel->r_offset + 8 <= input_section->size)
12128 {
12129 unsigned long nop;
12130 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12131 if (nop == NOP
12132 || nop == CROR_151515 || nop == CROR_313131)
12133 {
12134 if (h != NULL
12135 && (h == htab->tls_get_addr_fd
12136 || h == htab->tls_get_addr)
12137 && !htab->no_tls_get_addr_opt)
12138 {
12139 /* Special stub used, leave nop alone. */
12140 }
12141 else
12142 bfd_put_32 (input_bfd, LD_R2_40R1,
12143 contents + rel->r_offset + 4);
12144 can_plt_call = TRUE;
12145 }
12146 }
12147
12148 if (!can_plt_call)
12149 {
12150 if (stub_entry->stub_type == ppc_stub_plt_call)
12151 {
12152 /* If this is a plain branch rather than a branch
12153 and link, don't require a nop. However, don't
12154 allow tail calls in a shared library as they
12155 will result in r2 being corrupted. */
12156 unsigned long br;
12157 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12158 if (info->executable && (br & 1) == 0)
12159 can_plt_call = TRUE;
12160 else
12161 stub_entry = NULL;
12162 }
12163 else if (h != NULL
12164 && strcmp (h->elf.root.root.string,
12165 ".__libc_start_main") == 0)
12166 {
12167 /* Allow crt1 branch to go via a toc adjusting stub. */
12168 can_plt_call = TRUE;
12169 }
12170 else
12171 {
12172 if (strcmp (input_section->output_section->name,
12173 ".init") == 0
12174 || strcmp (input_section->output_section->name,
12175 ".fini") == 0)
12176 (*_bfd_error_handler)
12177 (_("%B(%A+0x%lx): automatic multiple TOCs "
12178 "not supported using your crt files; "
12179 "recompile with -mminimal-toc or upgrade gcc"),
12180 input_bfd,
12181 input_section,
12182 (long) rel->r_offset);
12183 else
12184 (*_bfd_error_handler)
12185 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
12186 "does not allow automatic multiple TOCs; "
12187 "recompile with -mminimal-toc or "
12188 "-fno-optimize-sibling-calls, "
12189 "or make `%s' extern"),
12190 input_bfd,
12191 input_section,
12192 (long) rel->r_offset,
12193 sym_name,
12194 sym_name);
12195 bfd_set_error (bfd_error_bad_value);
12196 ret = FALSE;
12197 }
12198 }
12199
12200 if (can_plt_call
12201 && stub_entry->stub_type == ppc_stub_plt_call)
12202 unresolved_reloc = FALSE;
12203 }
12204
12205 if ((stub_entry == NULL
12206 || stub_entry->stub_type == ppc_stub_long_branch
12207 || stub_entry->stub_type == ppc_stub_plt_branch)
12208 && get_opd_info (sec) != NULL)
12209 {
12210 /* The branch destination is the value of the opd entry. */
12211 bfd_vma off = (relocation + addend
12212 - sec->output_section->vma
12213 - sec->output_offset);
12214 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12215 if (dest != (bfd_vma) -1)
12216 {
12217 relocation = dest;
12218 addend = 0;
12219 }
12220 }
12221
12222 /* If the branch is out of reach we ought to have a long
12223 branch stub. */
12224 from = (rel->r_offset
12225 + input_section->output_offset
12226 + input_section->output_section->vma);
12227
12228 if (stub_entry != NULL
12229 && (stub_entry->stub_type == ppc_stub_long_branch
12230 || stub_entry->stub_type == ppc_stub_plt_branch)
12231 && (r_type == R_PPC64_ADDR14_BRTAKEN
12232 || r_type == R_PPC64_ADDR14_BRNTAKEN
12233 || (relocation + addend - from + max_br_offset
12234 < 2 * max_br_offset)))
12235 /* Don't use the stub if this branch is in range. */
12236 stub_entry = NULL;
12237
12238 if (stub_entry != NULL)
12239 {
12240 /* Munge up the value and addend so that we call the stub
12241 rather than the procedure directly. */
12242 relocation = (stub_entry->stub_offset
12243 + stub_entry->stub_sec->output_offset
12244 + stub_entry->stub_sec->output_section->vma);
12245 addend = 0;
12246 }
12247
12248 if (insn != 0)
12249 {
12250 if (is_power4)
12251 {
12252 /* Set 'a' bit. This is 0b00010 in BO field for branch
12253 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12254 for branch on CTR insns (BO == 1a00t or 1a01t). */
12255 if ((insn & (0x14 << 21)) == (0x04 << 21))
12256 insn |= 0x02 << 21;
12257 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12258 insn |= 0x08 << 21;
12259 else
12260 break;
12261 }
12262 else
12263 {
12264 /* Invert 'y' bit if not the default. */
12265 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12266 insn ^= 0x01 << 21;
12267 }
12268
12269 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12270 }
12271
12272 /* NOP out calls to undefined weak functions.
12273 We can thus call a weak function without first
12274 checking whether the function is defined. */
12275 else if (h != NULL
12276 && h->elf.root.type == bfd_link_hash_undefweak
12277 && h->elf.dynindx == -1
12278 && r_type == R_PPC64_REL24
12279 && relocation == 0
12280 && addend == 0)
12281 {
12282 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12283 continue;
12284 }
12285 break;
12286 }
12287
12288 /* Set `addend'. */
12289 tls_type = 0;
12290 switch (r_type)
12291 {
12292 default:
12293 (*_bfd_error_handler)
12294 (_("%B: unknown relocation type %d for symbol %s"),
12295 input_bfd, (int) r_type, sym_name);
12296
12297 bfd_set_error (bfd_error_bad_value);
12298 ret = FALSE;
12299 continue;
12300
12301 case R_PPC64_NONE:
12302 case R_PPC64_TLS:
12303 case R_PPC64_TLSGD:
12304 case R_PPC64_TLSLD:
12305 case R_PPC64_GNU_VTINHERIT:
12306 case R_PPC64_GNU_VTENTRY:
12307 continue;
12308
12309 /* GOT16 relocations. Like an ADDR16 using the symbol's
12310 address in the GOT as relocation value instead of the
12311 symbol's value itself. Also, create a GOT entry for the
12312 symbol and put the symbol value there. */
12313 case R_PPC64_GOT_TLSGD16:
12314 case R_PPC64_GOT_TLSGD16_LO:
12315 case R_PPC64_GOT_TLSGD16_HI:
12316 case R_PPC64_GOT_TLSGD16_HA:
12317 tls_type = TLS_TLS | TLS_GD;
12318 goto dogot;
12319
12320 case R_PPC64_GOT_TLSLD16:
12321 case R_PPC64_GOT_TLSLD16_LO:
12322 case R_PPC64_GOT_TLSLD16_HI:
12323 case R_PPC64_GOT_TLSLD16_HA:
12324 tls_type = TLS_TLS | TLS_LD;
12325 goto dogot;
12326
12327 case R_PPC64_GOT_TPREL16_DS:
12328 case R_PPC64_GOT_TPREL16_LO_DS:
12329 case R_PPC64_GOT_TPREL16_HI:
12330 case R_PPC64_GOT_TPREL16_HA:
12331 tls_type = TLS_TLS | TLS_TPREL;
12332 goto dogot;
12333
12334 case R_PPC64_GOT_DTPREL16_DS:
12335 case R_PPC64_GOT_DTPREL16_LO_DS:
12336 case R_PPC64_GOT_DTPREL16_HI:
12337 case R_PPC64_GOT_DTPREL16_HA:
12338 tls_type = TLS_TLS | TLS_DTPREL;
12339 goto dogot;
12340
12341 case R_PPC64_GOT16:
12342 case R_PPC64_GOT16_LO:
12343 case R_PPC64_GOT16_HI:
12344 case R_PPC64_GOT16_HA:
12345 case R_PPC64_GOT16_DS:
12346 case R_PPC64_GOT16_LO_DS:
12347 dogot:
12348 {
12349 /* Relocation is to the entry for this symbol in the global
12350 offset table. */
12351 asection *got;
12352 bfd_vma *offp;
12353 bfd_vma off;
12354 unsigned long indx = 0;
12355 struct got_entry *ent;
12356
12357 if (tls_type == (TLS_TLS | TLS_LD)
12358 && (h == NULL
12359 || !h->elf.def_dynamic))
12360 ent = ppc64_tlsld_got (input_bfd);
12361 else
12362 {
12363
12364 if (h != NULL)
12365 {
12366 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12367 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12368 &h->elf)
12369 || (info->shared
12370 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
12371 /* This is actually a static link, or it is a
12372 -Bsymbolic link and the symbol is defined
12373 locally, or the symbol was forced to be local
12374 because of a version file. */
12375 ;
12376 else
12377 {
12378 indx = h->elf.dynindx;
12379 unresolved_reloc = FALSE;
12380 }
12381 ent = h->elf.got.glist;
12382 }
12383 else
12384 {
12385 if (local_got_ents == NULL)
12386 abort ();
12387 ent = local_got_ents[r_symndx];
12388 }
12389
12390 for (; ent != NULL; ent = ent->next)
12391 if (ent->addend == orig_addend
12392 && ent->owner == input_bfd
12393 && ent->tls_type == tls_type)
12394 break;
12395 }
12396
12397 if (ent == NULL)
12398 abort ();
12399 if (ent->is_indirect)
12400 ent = ent->got.ent;
12401 offp = &ent->got.offset;
12402 got = ppc64_elf_tdata (ent->owner)->got;
12403 if (got == NULL)
12404 abort ();
12405
12406 /* The offset must always be a multiple of 8. We use the
12407 least significant bit to record whether we have already
12408 processed this entry. */
12409 off = *offp;
12410 if ((off & 1) != 0)
12411 off &= ~1;
12412 else
12413 {
12414 /* Generate relocs for the dynamic linker, except in
12415 the case of TLSLD where we'll use one entry per
12416 module. */
12417 asection *relgot;
12418 bfd_boolean ifunc;
12419
12420 *offp = off | 1;
12421 relgot = NULL;
12422 ifunc = (h != NULL
12423 ? h->elf.type == STT_GNU_IFUNC
12424 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12425 if ((info->shared || indx != 0)
12426 && (h == NULL
12427 || (tls_type == (TLS_TLS | TLS_LD)
12428 && !h->elf.def_dynamic)
12429 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12430 || h->elf.root.type != bfd_link_hash_undefweak))
12431 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12432 else if (ifunc)
12433 relgot = htab->reliplt;
12434 if (relgot != NULL)
12435 {
12436 outrel.r_offset = (got->output_section->vma
12437 + got->output_offset
12438 + off);
12439 outrel.r_addend = addend;
12440 if (tls_type & (TLS_LD | TLS_GD))
12441 {
12442 outrel.r_addend = 0;
12443 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12444 if (tls_type == (TLS_TLS | TLS_GD))
12445 {
12446 loc = relgot->contents;
12447 loc += (relgot->reloc_count++
12448 * sizeof (Elf64_External_Rela));
12449 bfd_elf64_swap_reloca_out (output_bfd,
12450 &outrel, loc);
12451 outrel.r_offset += 8;
12452 outrel.r_addend = addend;
12453 outrel.r_info
12454 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12455 }
12456 }
12457 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12458 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12459 else if (tls_type == (TLS_TLS | TLS_TPREL))
12460 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12461 else if (indx != 0)
12462 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12463 else
12464 {
12465 if (ifunc)
12466 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12467 else
12468 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12469
12470 /* Write the .got section contents for the sake
12471 of prelink. */
12472 loc = got->contents + off;
12473 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12474 loc);
12475 }
12476
12477 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12478 {
12479 outrel.r_addend += relocation;
12480 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12481 outrel.r_addend -= htab->elf.tls_sec->vma;
12482 }
12483 loc = relgot->contents;
12484 loc += (relgot->reloc_count++
12485 * sizeof (Elf64_External_Rela));
12486 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12487 }
12488
12489 /* Init the .got section contents here if we're not
12490 emitting a reloc. */
12491 else
12492 {
12493 relocation += addend;
12494 if (tls_type == (TLS_TLS | TLS_LD))
12495 relocation = 1;
12496 else if (tls_type != 0)
12497 {
12498 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12499 if (tls_type == (TLS_TLS | TLS_TPREL))
12500 relocation += DTP_OFFSET - TP_OFFSET;
12501
12502 if (tls_type == (TLS_TLS | TLS_GD))
12503 {
12504 bfd_put_64 (output_bfd, relocation,
12505 got->contents + off + 8);
12506 relocation = 1;
12507 }
12508 }
12509
12510 bfd_put_64 (output_bfd, relocation,
12511 got->contents + off);
12512 }
12513 }
12514
12515 if (off >= (bfd_vma) -2)
12516 abort ();
12517
12518 relocation = got->output_section->vma + got->output_offset + off;
12519 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12520 }
12521 break;
12522
12523 case R_PPC64_PLT16_HA:
12524 case R_PPC64_PLT16_HI:
12525 case R_PPC64_PLT16_LO:
12526 case R_PPC64_PLT32:
12527 case R_PPC64_PLT64:
12528 /* Relocation is to the entry for this symbol in the
12529 procedure linkage table. */
12530
12531 /* Resolve a PLT reloc against a local symbol directly,
12532 without using the procedure linkage table. */
12533 if (h == NULL)
12534 break;
12535
12536 /* It's possible that we didn't make a PLT entry for this
12537 symbol. This happens when statically linking PIC code,
12538 or when using -Bsymbolic. Go find a match if there is a
12539 PLT entry. */
12540 if (htab->plt != NULL)
12541 {
12542 struct plt_entry *ent;
12543 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12544 if (ent->addend == orig_addend
12545 && ent->plt.offset != (bfd_vma) -1)
12546 {
12547 relocation = (htab->plt->output_section->vma
12548 + htab->plt->output_offset
12549 + ent->plt.offset);
12550 unresolved_reloc = FALSE;
12551 }
12552 }
12553 break;
12554
12555 case R_PPC64_TOC:
12556 /* Relocation value is TOC base. */
12557 relocation = TOCstart;
12558 if (r_symndx == 0)
12559 relocation += htab->stub_group[input_section->id].toc_off;
12560 else if (unresolved_reloc)
12561 ;
12562 else if (sec != NULL && sec->id <= htab->top_id)
12563 relocation += htab->stub_group[sec->id].toc_off;
12564 else
12565 unresolved_reloc = TRUE;
12566 goto dodyn;
12567
12568 /* TOC16 relocs. We want the offset relative to the TOC base,
12569 which is the address of the start of the TOC plus 0x8000.
12570 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12571 in this order. */
12572 case R_PPC64_TOC16:
12573 case R_PPC64_TOC16_LO:
12574 case R_PPC64_TOC16_HI:
12575 case R_PPC64_TOC16_DS:
12576 case R_PPC64_TOC16_LO_DS:
12577 case R_PPC64_TOC16_HA:
12578 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12579 break;
12580
12581 /* Relocate against the beginning of the section. */
12582 case R_PPC64_SECTOFF:
12583 case R_PPC64_SECTOFF_LO:
12584 case R_PPC64_SECTOFF_HI:
12585 case R_PPC64_SECTOFF_DS:
12586 case R_PPC64_SECTOFF_LO_DS:
12587 case R_PPC64_SECTOFF_HA:
12588 if (sec != NULL)
12589 addend -= sec->output_section->vma;
12590 break;
12591
12592 case R_PPC64_REL16:
12593 case R_PPC64_REL16_LO:
12594 case R_PPC64_REL16_HI:
12595 case R_PPC64_REL16_HA:
12596 break;
12597
12598 case R_PPC64_REL14:
12599 case R_PPC64_REL14_BRNTAKEN:
12600 case R_PPC64_REL14_BRTAKEN:
12601 case R_PPC64_REL24:
12602 break;
12603
12604 case R_PPC64_TPREL16:
12605 case R_PPC64_TPREL16_LO:
12606 case R_PPC64_TPREL16_HI:
12607 case R_PPC64_TPREL16_HA:
12608 case R_PPC64_TPREL16_DS:
12609 case R_PPC64_TPREL16_LO_DS:
12610 case R_PPC64_TPREL16_HIGHER:
12611 case R_PPC64_TPREL16_HIGHERA:
12612 case R_PPC64_TPREL16_HIGHEST:
12613 case R_PPC64_TPREL16_HIGHESTA:
12614 if (h != NULL
12615 && h->elf.root.type == bfd_link_hash_undefweak
12616 && h->elf.dynindx == -1)
12617 {
12618 /* Make this relocation against an undefined weak symbol
12619 resolve to zero. This is really just a tweak, since
12620 code using weak externs ought to check that they are
12621 defined before using them. */
12622 bfd_byte *p = contents + rel->r_offset - d_offset;
12623
12624 insn = bfd_get_32 (output_bfd, p);
12625 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12626 if (insn != 0)
12627 bfd_put_32 (output_bfd, insn, p);
12628 break;
12629 }
12630 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12631 if (info->shared)
12632 /* The TPREL16 relocs shouldn't really be used in shared
12633 libs as they will result in DT_TEXTREL being set, but
12634 support them anyway. */
12635 goto dodyn;
12636 break;
12637
12638 case R_PPC64_DTPREL16:
12639 case R_PPC64_DTPREL16_LO:
12640 case R_PPC64_DTPREL16_HI:
12641 case R_PPC64_DTPREL16_HA:
12642 case R_PPC64_DTPREL16_DS:
12643 case R_PPC64_DTPREL16_LO_DS:
12644 case R_PPC64_DTPREL16_HIGHER:
12645 case R_PPC64_DTPREL16_HIGHERA:
12646 case R_PPC64_DTPREL16_HIGHEST:
12647 case R_PPC64_DTPREL16_HIGHESTA:
12648 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12649 break;
12650
12651 case R_PPC64_DTPMOD64:
12652 relocation = 1;
12653 addend = 0;
12654 goto dodyn;
12655
12656 case R_PPC64_TPREL64:
12657 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12658 goto dodyn;
12659
12660 case R_PPC64_DTPREL64:
12661 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12662 /* Fall thru */
12663
12664 /* Relocations that may need to be propagated if this is a
12665 dynamic object. */
12666 case R_PPC64_REL30:
12667 case R_PPC64_REL32:
12668 case R_PPC64_REL64:
12669 case R_PPC64_ADDR14:
12670 case R_PPC64_ADDR14_BRNTAKEN:
12671 case R_PPC64_ADDR14_BRTAKEN:
12672 case R_PPC64_ADDR16:
12673 case R_PPC64_ADDR16_DS:
12674 case R_PPC64_ADDR16_HA:
12675 case R_PPC64_ADDR16_HI:
12676 case R_PPC64_ADDR16_HIGHER:
12677 case R_PPC64_ADDR16_HIGHERA:
12678 case R_PPC64_ADDR16_HIGHEST:
12679 case R_PPC64_ADDR16_HIGHESTA:
12680 case R_PPC64_ADDR16_LO:
12681 case R_PPC64_ADDR16_LO_DS:
12682 case R_PPC64_ADDR24:
12683 case R_PPC64_ADDR32:
12684 case R_PPC64_ADDR64:
12685 case R_PPC64_UADDR16:
12686 case R_PPC64_UADDR32:
12687 case R_PPC64_UADDR64:
12688 dodyn:
12689 if ((input_section->flags & SEC_ALLOC) == 0)
12690 break;
12691
12692 if (NO_OPD_RELOCS && is_opd)
12693 break;
12694
12695 if ((info->shared
12696 && (h == NULL
12697 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12698 || h->elf.root.type != bfd_link_hash_undefweak)
12699 && (must_be_dyn_reloc (info, r_type)
12700 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12701 || (ELIMINATE_COPY_RELOCS
12702 && !info->shared
12703 && h != NULL
12704 && h->elf.dynindx != -1
12705 && !h->elf.non_got_ref
12706 && !h->elf.def_regular)
12707 || (!info->shared
12708 && (h != NULL
12709 ? h->elf.type == STT_GNU_IFUNC
12710 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12711 {
12712 bfd_boolean skip, relocate;
12713 asection *sreloc;
12714 bfd_vma out_off;
12715
12716 /* When generating a dynamic object, these relocations
12717 are copied into the output file to be resolved at run
12718 time. */
12719
12720 skip = FALSE;
12721 relocate = FALSE;
12722
12723 out_off = _bfd_elf_section_offset (output_bfd, info,
12724 input_section, rel->r_offset);
12725 if (out_off == (bfd_vma) -1)
12726 skip = TRUE;
12727 else if (out_off == (bfd_vma) -2)
12728 skip = TRUE, relocate = TRUE;
12729 out_off += (input_section->output_section->vma
12730 + input_section->output_offset);
12731 outrel.r_offset = out_off;
12732 outrel.r_addend = rel->r_addend;
12733
12734 /* Optimize unaligned reloc use. */
12735 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12736 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12737 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12738 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12739 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12740 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12741 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12742 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12743 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12744
12745 if (skip)
12746 memset (&outrel, 0, sizeof outrel);
12747 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
12748 && !is_opd
12749 && r_type != R_PPC64_TOC)
12750 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12751 else
12752 {
12753 /* This symbol is local, or marked to become local,
12754 or this is an opd section reloc which must point
12755 at a local function. */
12756 outrel.r_addend += relocation;
12757 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12758 {
12759 if (is_opd && h != NULL)
12760 {
12761 /* Lie about opd entries. This case occurs
12762 when building shared libraries and we
12763 reference a function in another shared
12764 lib. The same thing happens for a weak
12765 definition in an application that's
12766 overridden by a strong definition in a
12767 shared lib. (I believe this is a generic
12768 bug in binutils handling of weak syms.)
12769 In these cases we won't use the opd
12770 entry in this lib. */
12771 unresolved_reloc = FALSE;
12772 }
12773 if (!is_opd
12774 && r_type == R_PPC64_ADDR64
12775 && (h != NULL
12776 ? h->elf.type == STT_GNU_IFUNC
12777 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12778 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12779 else
12780 {
12781 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12782
12783 /* We need to relocate .opd contents for ld.so.
12784 Prelink also wants simple and consistent rules
12785 for relocs. This make all RELATIVE relocs have
12786 *r_offset equal to r_addend. */
12787 relocate = TRUE;
12788 }
12789 }
12790 else
12791 {
12792 long indx = 0;
12793
12794 if (h != NULL
12795 ? h->elf.type == STT_GNU_IFUNC
12796 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12797 {
12798 (*_bfd_error_handler)
12799 (_("%B(%A+0x%lx): relocation %s for indirect "
12800 "function %s unsupported"),
12801 input_bfd,
12802 input_section,
12803 (long) rel->r_offset,
12804 ppc64_elf_howto_table[r_type]->name,
12805 sym_name);
12806 ret = FALSE;
12807 }
12808 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12809 ;
12810 else if (sec == NULL || sec->owner == NULL)
12811 {
12812 bfd_set_error (bfd_error_bad_value);
12813 return FALSE;
12814 }
12815 else
12816 {
12817 asection *osec;
12818
12819 osec = sec->output_section;
12820 indx = elf_section_data (osec)->dynindx;
12821
12822 if (indx == 0)
12823 {
12824 if ((osec->flags & SEC_READONLY) == 0
12825 && htab->elf.data_index_section != NULL)
12826 osec = htab->elf.data_index_section;
12827 else
12828 osec = htab->elf.text_index_section;
12829 indx = elf_section_data (osec)->dynindx;
12830 }
12831 BFD_ASSERT (indx != 0);
12832
12833 /* We are turning this relocation into one
12834 against a section symbol, so subtract out
12835 the output section's address but not the
12836 offset of the input section in the output
12837 section. */
12838 outrel.r_addend -= osec->vma;
12839 }
12840
12841 outrel.r_info = ELF64_R_INFO (indx, r_type);
12842 }
12843 }
12844
12845 sreloc = elf_section_data (input_section)->sreloc;
12846 if (!htab->elf.dynamic_sections_created)
12847 sreloc = htab->reliplt;
12848 if (sreloc == NULL)
12849 abort ();
12850
12851 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12852 >= sreloc->size)
12853 abort ();
12854 loc = sreloc->contents;
12855 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12856 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12857
12858 /* If this reloc is against an external symbol, it will
12859 be computed at runtime, so there's no need to do
12860 anything now. However, for the sake of prelink ensure
12861 that the section contents are a known value. */
12862 if (! relocate)
12863 {
12864 unresolved_reloc = FALSE;
12865 /* The value chosen here is quite arbitrary as ld.so
12866 ignores section contents except for the special
12867 case of .opd where the contents might be accessed
12868 before relocation. Choose zero, as that won't
12869 cause reloc overflow. */
12870 relocation = 0;
12871 addend = 0;
12872 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12873 to improve backward compatibility with older
12874 versions of ld. */
12875 if (r_type == R_PPC64_ADDR64)
12876 addend = outrel.r_addend;
12877 /* Adjust pc_relative relocs to have zero in *r_offset. */
12878 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12879 addend = (input_section->output_section->vma
12880 + input_section->output_offset
12881 + rel->r_offset);
12882 }
12883 }
12884 break;
12885
12886 case R_PPC64_COPY:
12887 case R_PPC64_GLOB_DAT:
12888 case R_PPC64_JMP_SLOT:
12889 case R_PPC64_JMP_IREL:
12890 case R_PPC64_RELATIVE:
12891 /* We shouldn't ever see these dynamic relocs in relocatable
12892 files. */
12893 /* Fall through. */
12894
12895 case R_PPC64_PLTGOT16:
12896 case R_PPC64_PLTGOT16_DS:
12897 case R_PPC64_PLTGOT16_HA:
12898 case R_PPC64_PLTGOT16_HI:
12899 case R_PPC64_PLTGOT16_LO:
12900 case R_PPC64_PLTGOT16_LO_DS:
12901 case R_PPC64_PLTREL32:
12902 case R_PPC64_PLTREL64:
12903 /* These ones haven't been implemented yet. */
12904
12905 (*_bfd_error_handler)
12906 (_("%B: relocation %s is not supported for symbol %s."),
12907 input_bfd,
12908 ppc64_elf_howto_table[r_type]->name, sym_name);
12909
12910 bfd_set_error (bfd_error_invalid_operation);
12911 ret = FALSE;
12912 continue;
12913 }
12914
12915 /* Multi-instruction sequences that access the TOC can be
12916 optimized, eg. addis ra,r2,0; addi rb,ra,x;
12917 to nop; addi rb,r2,x; */
12918 switch (r_type)
12919 {
12920 default:
12921 break;
12922
12923 case R_PPC64_GOT_TLSLD16_HI:
12924 case R_PPC64_GOT_TLSGD16_HI:
12925 case R_PPC64_GOT_TPREL16_HI:
12926 case R_PPC64_GOT_DTPREL16_HI:
12927 case R_PPC64_GOT16_HI:
12928 case R_PPC64_TOC16_HI:
12929 /* These relocs would only be useful if building up an
12930 offset to later add to r2, perhaps in an indexed
12931 addressing mode instruction. Don't try to optimize.
12932 Unfortunately, the possibility of someone building up an
12933 offset like this or even with the HA relocs, means that
12934 we need to check the high insn when optimizing the low
12935 insn. */
12936 break;
12937
12938 case R_PPC64_GOT_TLSLD16_HA:
12939 case R_PPC64_GOT_TLSGD16_HA:
12940 case R_PPC64_GOT_TPREL16_HA:
12941 case R_PPC64_GOT_DTPREL16_HA:
12942 case R_PPC64_GOT16_HA:
12943 case R_PPC64_TOC16_HA:
12944 /* For now we don't nop out the first instruction. */
12945 break;
12946
12947 case R_PPC64_GOT_TLSLD16_LO:
12948 case R_PPC64_GOT_TLSGD16_LO:
12949 case R_PPC64_GOT_TPREL16_LO_DS:
12950 case R_PPC64_GOT_DTPREL16_LO_DS:
12951 case R_PPC64_GOT16_LO:
12952 case R_PPC64_GOT16_LO_DS:
12953 case R_PPC64_TOC16_LO:
12954 case R_PPC64_TOC16_LO_DS:
12955 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
12956 {
12957 bfd_byte *p = contents + (rel->r_offset & ~3);
12958 insn = bfd_get_32 (input_bfd, p);
12959 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
12960 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
12961 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
12962 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
12963 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
12964 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
12965 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
12966 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
12967 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
12968 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
12969 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
12970 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
12971 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
12972 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
12973 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
12974 && (insn & 3) != 1)
12975 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
12976 && ((insn & 3) == 0 || (insn & 3) == 3)))
12977 {
12978 unsigned int reg = (insn >> 16) & 0x1f;
12979 if (ha_reloc_match (relocs, rel, reg, input_bfd, contents))
12980 {
12981 insn &= ~(0x1f << 16);
12982 insn |= 2 << 16;
12983 bfd_put_32 (input_bfd, insn, p);
12984 }
12985 }
12986 }
12987 break;
12988 }
12989
12990 /* Do any further special processing. */
12991 switch (r_type)
12992 {
12993 default:
12994 break;
12995
12996 case R_PPC64_ADDR16_HA:
12997 case R_PPC64_REL16_HA:
12998 case R_PPC64_ADDR16_HIGHERA:
12999 case R_PPC64_ADDR16_HIGHESTA:
13000 case R_PPC64_TOC16_HA:
13001 case R_PPC64_SECTOFF_HA:
13002 case R_PPC64_TPREL16_HA:
13003 case R_PPC64_DTPREL16_HA:
13004 case R_PPC64_TPREL16_HIGHER:
13005 case R_PPC64_TPREL16_HIGHERA:
13006 case R_PPC64_TPREL16_HIGHEST:
13007 case R_PPC64_TPREL16_HIGHESTA:
13008 case R_PPC64_DTPREL16_HIGHER:
13009 case R_PPC64_DTPREL16_HIGHERA:
13010 case R_PPC64_DTPREL16_HIGHEST:
13011 case R_PPC64_DTPREL16_HIGHESTA:
13012 /* It's just possible that this symbol is a weak symbol
13013 that's not actually defined anywhere. In that case,
13014 'sec' would be NULL, and we should leave the symbol
13015 alone (it will be set to zero elsewhere in the link). */
13016 if (sec == NULL)
13017 break;
13018 /* Fall thru */
13019
13020 case R_PPC64_GOT16_HA:
13021 case R_PPC64_PLTGOT16_HA:
13022 case R_PPC64_PLT16_HA:
13023 case R_PPC64_GOT_TLSGD16_HA:
13024 case R_PPC64_GOT_TLSLD16_HA:
13025 case R_PPC64_GOT_TPREL16_HA:
13026 case R_PPC64_GOT_DTPREL16_HA:
13027 /* Add 0x10000 if sign bit in 0:15 is set.
13028 Bits 0:15 are not used. */
13029 addend += 0x8000;
13030 break;
13031
13032 case R_PPC64_ADDR16_DS:
13033 case R_PPC64_ADDR16_LO_DS:
13034 case R_PPC64_GOT16_DS:
13035 case R_PPC64_GOT16_LO_DS:
13036 case R_PPC64_PLT16_LO_DS:
13037 case R_PPC64_SECTOFF_DS:
13038 case R_PPC64_SECTOFF_LO_DS:
13039 case R_PPC64_TOC16_DS:
13040 case R_PPC64_TOC16_LO_DS:
13041 case R_PPC64_PLTGOT16_DS:
13042 case R_PPC64_PLTGOT16_LO_DS:
13043 case R_PPC64_GOT_TPREL16_DS:
13044 case R_PPC64_GOT_TPREL16_LO_DS:
13045 case R_PPC64_GOT_DTPREL16_DS:
13046 case R_PPC64_GOT_DTPREL16_LO_DS:
13047 case R_PPC64_TPREL16_DS:
13048 case R_PPC64_TPREL16_LO_DS:
13049 case R_PPC64_DTPREL16_DS:
13050 case R_PPC64_DTPREL16_LO_DS:
13051 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13052 mask = 3;
13053 /* If this reloc is against an lq insn, then the value must be
13054 a multiple of 16. This is somewhat of a hack, but the
13055 "correct" way to do this by defining _DQ forms of all the
13056 _DS relocs bloats all reloc switches in this file. It
13057 doesn't seem to make much sense to use any of these relocs
13058 in data, so testing the insn should be safe. */
13059 if ((insn & (0x3f << 26)) == (56u << 26))
13060 mask = 15;
13061 if (((relocation + addend) & mask) != 0)
13062 {
13063 (*_bfd_error_handler)
13064 (_("%B: error: relocation %s not a multiple of %d"),
13065 input_bfd,
13066 ppc64_elf_howto_table[r_type]->name,
13067 mask + 1);
13068 bfd_set_error (bfd_error_bad_value);
13069 ret = FALSE;
13070 continue;
13071 }
13072 break;
13073 }
13074
13075 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13076 because such sections are not SEC_ALLOC and thus ld.so will
13077 not process them. */
13078 if (unresolved_reloc
13079 && !((input_section->flags & SEC_DEBUGGING) != 0
13080 && h->elf.def_dynamic))
13081 {
13082 (*_bfd_error_handler)
13083 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
13084 input_bfd,
13085 input_section,
13086 (long) rel->r_offset,
13087 ppc64_elf_howto_table[(int) r_type]->name,
13088 h->elf.root.root.string);
13089 ret = FALSE;
13090 }
13091
13092 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13093 input_bfd,
13094 input_section,
13095 contents,
13096 rel->r_offset,
13097 relocation,
13098 addend);
13099
13100 if (r != bfd_reloc_ok)
13101 {
13102 if (sym_name == NULL)
13103 sym_name = "(null)";
13104 if (r == bfd_reloc_overflow)
13105 {
13106 if (warned)
13107 continue;
13108 if (h != NULL
13109 && h->elf.root.type == bfd_link_hash_undefweak
13110 && ppc64_elf_howto_table[r_type]->pc_relative)
13111 {
13112 /* Assume this is a call protected by other code that
13113 detects the symbol is undefined. If this is the case,
13114 we can safely ignore the overflow. If not, the
13115 program is hosed anyway, and a little warning isn't
13116 going to help. */
13117
13118 continue;
13119 }
13120
13121 if (!((*info->callbacks->reloc_overflow)
13122 (info, (h ? &h->elf.root : NULL), sym_name,
13123 ppc64_elf_howto_table[r_type]->name,
13124 orig_addend, input_bfd, input_section, rel->r_offset)))
13125 return FALSE;
13126 }
13127 else
13128 {
13129 (*_bfd_error_handler)
13130 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
13131 input_bfd,
13132 input_section,
13133 (long) rel->r_offset,
13134 ppc64_elf_howto_table[r_type]->name,
13135 sym_name,
13136 (int) r);
13137 ret = FALSE;
13138 }
13139 }
13140 }
13141
13142 /* If we're emitting relocations, then shortly after this function
13143 returns, reloc offsets and addends for this section will be
13144 adjusted. Worse, reloc symbol indices will be for the output
13145 file rather than the input. Save a copy of the relocs for
13146 opd_entry_value. */
13147 if (is_opd && (info->emitrelocations || info->relocatable))
13148 {
13149 bfd_size_type amt;
13150 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13151 rel = bfd_alloc (input_bfd, amt);
13152 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13153 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13154 if (rel == NULL)
13155 return FALSE;
13156 memcpy (rel, relocs, amt);
13157 }
13158 return ret;
13159 }
13160
13161 /* Adjust the value of any local symbols in opd sections. */
13162
13163 static int
13164 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13165 const char *name ATTRIBUTE_UNUSED,
13166 Elf_Internal_Sym *elfsym,
13167 asection *input_sec,
13168 struct elf_link_hash_entry *h)
13169 {
13170 struct _opd_sec_data *opd;
13171 long adjust;
13172 bfd_vma value;
13173
13174 if (h != NULL)
13175 return 1;
13176
13177 opd = get_opd_info (input_sec);
13178 if (opd == NULL || opd->adjust == NULL)
13179 return 1;
13180
13181 value = elfsym->st_value - input_sec->output_offset;
13182 if (!info->relocatable)
13183 value -= input_sec->output_section->vma;
13184
13185 adjust = opd->adjust[value / 8];
13186 if (adjust == -1)
13187 return 2;
13188
13189 elfsym->st_value += adjust;
13190 return 1;
13191 }
13192
13193 /* Finish up dynamic symbol handling. We set the contents of various
13194 dynamic sections here. */
13195
13196 static bfd_boolean
13197 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13198 struct bfd_link_info *info,
13199 struct elf_link_hash_entry *h,
13200 Elf_Internal_Sym *sym)
13201 {
13202 struct ppc_link_hash_table *htab;
13203 struct plt_entry *ent;
13204 Elf_Internal_Rela rela;
13205 bfd_byte *loc;
13206
13207 htab = ppc_hash_table (info);
13208 if (htab == NULL)
13209 return FALSE;
13210
13211 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13212 if (ent->plt.offset != (bfd_vma) -1)
13213 {
13214 /* This symbol has an entry in the procedure linkage
13215 table. Set it up. */
13216 if (!htab->elf.dynamic_sections_created
13217 || h->dynindx == -1)
13218 {
13219 BFD_ASSERT (h->type == STT_GNU_IFUNC
13220 && h->def_regular
13221 && (h->root.type == bfd_link_hash_defined
13222 || h->root.type == bfd_link_hash_defweak));
13223 rela.r_offset = (htab->iplt->output_section->vma
13224 + htab->iplt->output_offset
13225 + ent->plt.offset);
13226 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13227 rela.r_addend = (h->root.u.def.value
13228 + h->root.u.def.section->output_offset
13229 + h->root.u.def.section->output_section->vma
13230 + ent->addend);
13231 loc = (htab->reliplt->contents
13232 + (htab->reliplt->reloc_count++
13233 * sizeof (Elf64_External_Rela)));
13234 }
13235 else
13236 {
13237 rela.r_offset = (htab->plt->output_section->vma
13238 + htab->plt->output_offset
13239 + ent->plt.offset);
13240 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13241 rela.r_addend = ent->addend;
13242 loc = (htab->relplt->contents
13243 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13244 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13245 }
13246 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13247 }
13248
13249 if (h->needs_copy)
13250 {
13251 /* This symbol needs a copy reloc. Set it up. */
13252
13253 if (h->dynindx == -1
13254 || (h->root.type != bfd_link_hash_defined
13255 && h->root.type != bfd_link_hash_defweak)
13256 || htab->relbss == NULL)
13257 abort ();
13258
13259 rela.r_offset = (h->root.u.def.value
13260 + h->root.u.def.section->output_section->vma
13261 + h->root.u.def.section->output_offset);
13262 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13263 rela.r_addend = 0;
13264 loc = htab->relbss->contents;
13265 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13266 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13267 }
13268
13269 /* Mark some specially defined symbols as absolute. */
13270 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13271 sym->st_shndx = SHN_ABS;
13272
13273 return TRUE;
13274 }
13275
13276 /* Used to decide how to sort relocs in an optimal manner for the
13277 dynamic linker, before writing them out. */
13278
13279 static enum elf_reloc_type_class
13280 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13281 {
13282 enum elf_ppc64_reloc_type r_type;
13283
13284 r_type = ELF64_R_TYPE (rela->r_info);
13285 switch (r_type)
13286 {
13287 case R_PPC64_RELATIVE:
13288 return reloc_class_relative;
13289 case R_PPC64_JMP_SLOT:
13290 return reloc_class_plt;
13291 case R_PPC64_COPY:
13292 return reloc_class_copy;
13293 default:
13294 return reloc_class_normal;
13295 }
13296 }
13297
13298 /* Finish up the dynamic sections. */
13299
13300 static bfd_boolean
13301 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13302 struct bfd_link_info *info)
13303 {
13304 struct ppc_link_hash_table *htab;
13305 bfd *dynobj;
13306 asection *sdyn;
13307
13308 htab = ppc_hash_table (info);
13309 if (htab == NULL)
13310 return FALSE;
13311
13312 dynobj = htab->elf.dynobj;
13313 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13314
13315 if (htab->elf.dynamic_sections_created)
13316 {
13317 Elf64_External_Dyn *dyncon, *dynconend;
13318
13319 if (sdyn == NULL || htab->got == NULL)
13320 abort ();
13321
13322 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13323 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13324 for (; dyncon < dynconend; dyncon++)
13325 {
13326 Elf_Internal_Dyn dyn;
13327 asection *s;
13328
13329 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13330
13331 switch (dyn.d_tag)
13332 {
13333 default:
13334 continue;
13335
13336 case DT_PPC64_GLINK:
13337 s = htab->glink;
13338 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13339 /* We stupidly defined DT_PPC64_GLINK to be the start
13340 of glink rather than the first entry point, which is
13341 what ld.so needs, and now have a bigger stub to
13342 support automatic multiple TOCs. */
13343 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13344 break;
13345
13346 case DT_PPC64_OPD:
13347 s = bfd_get_section_by_name (output_bfd, ".opd");
13348 if (s == NULL)
13349 continue;
13350 dyn.d_un.d_ptr = s->vma;
13351 break;
13352
13353 case DT_PPC64_OPDSZ:
13354 s = bfd_get_section_by_name (output_bfd, ".opd");
13355 if (s == NULL)
13356 continue;
13357 dyn.d_un.d_val = s->size;
13358 break;
13359
13360 case DT_PLTGOT:
13361 s = htab->plt;
13362 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13363 break;
13364
13365 case DT_JMPREL:
13366 s = htab->relplt;
13367 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13368 break;
13369
13370 case DT_PLTRELSZ:
13371 dyn.d_un.d_val = htab->relplt->size;
13372 break;
13373
13374 case DT_RELASZ:
13375 /* Don't count procedure linkage table relocs in the
13376 overall reloc count. */
13377 s = htab->relplt;
13378 if (s == NULL)
13379 continue;
13380 dyn.d_un.d_val -= s->size;
13381 break;
13382
13383 case DT_RELA:
13384 /* We may not be using the standard ELF linker script.
13385 If .rela.plt is the first .rela section, we adjust
13386 DT_RELA to not include it. */
13387 s = htab->relplt;
13388 if (s == NULL)
13389 continue;
13390 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13391 continue;
13392 dyn.d_un.d_ptr += s->size;
13393 break;
13394 }
13395
13396 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13397 }
13398 }
13399
13400 if (htab->got != NULL && htab->got->size != 0)
13401 {
13402 /* Fill in the first entry in the global offset table.
13403 We use it to hold the link-time TOCbase. */
13404 bfd_put_64 (output_bfd,
13405 elf_gp (output_bfd) + TOC_BASE_OFF,
13406 htab->got->contents);
13407
13408 /* Set .got entry size. */
13409 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13410 }
13411
13412 if (htab->plt != NULL && htab->plt->size != 0)
13413 {
13414 /* Set .plt entry size. */
13415 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13416 = PLT_ENTRY_SIZE;
13417 }
13418
13419 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13420 brlt ourselves if emitrelocations. */
13421 if (htab->brlt != NULL
13422 && htab->brlt->reloc_count != 0
13423 && !_bfd_elf_link_output_relocs (output_bfd,
13424 htab->brlt,
13425 &elf_section_data (htab->brlt)->rel_hdr,
13426 elf_section_data (htab->brlt)->relocs,
13427 NULL))
13428 return FALSE;
13429
13430 if (htab->glink != NULL
13431 && htab->glink->reloc_count != 0
13432 && !_bfd_elf_link_output_relocs (output_bfd,
13433 htab->glink,
13434 &elf_section_data (htab->glink)->rel_hdr,
13435 elf_section_data (htab->glink)->relocs,
13436 NULL))
13437 return FALSE;
13438
13439 /* We need to handle writing out multiple GOT sections ourselves,
13440 since we didn't add them to DYNOBJ. We know dynobj is the first
13441 bfd. */
13442 while ((dynobj = dynobj->link_next) != NULL)
13443 {
13444 asection *s;
13445
13446 if (!is_ppc64_elf (dynobj))
13447 continue;
13448
13449 s = ppc64_elf_tdata (dynobj)->got;
13450 if (s != NULL
13451 && s->size != 0
13452 && s->output_section != bfd_abs_section_ptr
13453 && !bfd_set_section_contents (output_bfd, s->output_section,
13454 s->contents, s->output_offset,
13455 s->size))
13456 return FALSE;
13457 s = ppc64_elf_tdata (dynobj)->relgot;
13458 if (s != NULL
13459 && s->size != 0
13460 && s->output_section != bfd_abs_section_ptr
13461 && !bfd_set_section_contents (output_bfd, s->output_section,
13462 s->contents, s->output_offset,
13463 s->size))
13464 return FALSE;
13465 }
13466
13467 return TRUE;
13468 }
13469
13470 #include "elf64-target.h"