projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Also hide symbols without PLT nor GOT references.
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37 #include "dwarf2.h"
38
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *);
59
60 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61 #define TARGET_LITTLE_NAME "elf64-powerpcle"
62 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63 #define TARGET_BIG_NAME "elf64-powerpc"
64 #define ELF_ARCH bfd_arch_powerpc
65 #define ELF_TARGET_ID PPC64_ELF_DATA
66 #define ELF_MACHINE_CODE EM_PPC64
67 #define ELF_MAXPAGESIZE 0x10000
68 #define ELF_COMMONPAGESIZE 0x1000
69 #define elf_info_to_howto ppc64_elf_info_to_howto
70
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_default_execstack 0
80
81 #define bfd_elf64_mkobject ppc64_elf_mkobject
82 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
89 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
90
91 #define elf_backend_object_p ppc64_elf_object_p
92 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
93 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
94 #define elf_backend_write_core_note ppc64_elf_write_core_note
95 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
96 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
97 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
98 #define elf_backend_check_directives ppc64_elf_process_dot_syms
99 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
100 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
101 #define elf_backend_check_relocs ppc64_elf_check_relocs
102 #define elf_backend_gc_keep ppc64_elf_gc_keep
103 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
104 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
105 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
106 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
107 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
111 #define elf_backend_action_discarded ppc64_elf_action_discarded
112 #define elf_backend_relocate_section ppc64_elf_relocate_section
113 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
114 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
115 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
116 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
117 #define elf_backend_special_sections ppc64_elf_special_sections
118 #define elf_backend_post_process_headers _bfd_elf_set_osabi
119
120 /* The name of the dynamic interpreter. This is put in the .interp
121 section. */
122 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
123
124 /* The size in bytes of an entry in the procedure linkage table. */
125 #define PLT_ENTRY_SIZE 24
126
127 /* The initial size of the plt reserved for the dynamic linker. */
128 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
129
130 /* TOC base pointers offset from start of TOC. */
131 #define TOC_BASE_OFF 0x8000
132
133 /* Offset of tp and dtp pointers from start of TLS block. */
134 #define TP_OFFSET 0x7000
135 #define DTP_OFFSET 0x8000
136
137 /* .plt call stub instructions. The normal stub is like this, but
138 sometimes the .plt entry crosses a 64k boundary and we need to
139 insert an addi to adjust r12. */
140 #define PLT_CALL_STUB_SIZE (7*4)
141 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
142 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
143 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
144 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
145 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
146 /* ld %r11,xxx+16@l(%r12) */
147 #define BCTR 0x4e800420 /* bctr */
148
149
150 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
151 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
152 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
153 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
154
155 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
156 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
157
158 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
159
160 /* glink call stub instructions. We enter with the index in R0. */
161 #define GLINK_CALL_STUB_SIZE (16*4)
162 /* 0: */
163 /* .quad plt0-1f */
164 /* __glink: */
165 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
166 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
167 /* 1: */
168 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
169 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
170 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
171 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
172 /* ld %11,0(%12) */
173 /* ld %2,8(%12) */
174 /* mtctr %11 */
175 /* ld %11,16(%12) */
176 /* bctr */
177
178 /* Pad with this. */
179 #define NOP 0x60000000
180
181 /* Some other nops. */
182 #define CROR_151515 0x4def7b82
183 #define CROR_313131 0x4ffffb82
184
185 /* .glink entries for the first 32k functions are two instructions. */
186 #define LI_R0_0 0x38000000 /* li %r0,0 */
187 #define B_DOT 0x48000000 /* b . */
188
189 /* After that, we need two instructions to load the index, followed by
190 a branch. */
191 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
192 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
193
194 /* Instructions used by the save and restore reg functions. */
195 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
196 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
197 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
198 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
199 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
200 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
201 #define LI_R12_0 0x39800000 /* li %r12,0 */
202 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
203 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
204 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
205 #define BLR 0x4e800020 /* blr */
206
207 /* Since .opd is an array of descriptors and each entry will end up
208 with identical R_PPC64_RELATIVE relocs, there is really no need to
209 propagate .opd relocs; The dynamic linker should be taught to
210 relocate .opd without reloc entries. */
211 #ifndef NO_OPD_RELOCS
212 #define NO_OPD_RELOCS 0
213 #endif
214 \f
215 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
216
217 /* Relocation HOWTO's. */
218 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
219
220 static reloc_howto_type ppc64_elf_howto_raw[] = {
221 /* This reloc does nothing. */
222 HOWTO (R_PPC64_NONE, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 32, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_dont, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC64_NONE", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* A standard 32 bit relocation. */
237 HOWTO (R_PPC64_ADDR32, /* type */
238 0, /* rightshift */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
240 32, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC64_ADDR32", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffffffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* An absolute 26 bit branch; the lower two bits must be zero.
252 FIXME: we don't check that, we just clear them. */
253 HOWTO (R_PPC64_ADDR24, /* type */
254 0, /* rightshift */
255 2, /* size (0 = byte, 1 = short, 2 = long) */
256 26, /* bitsize */
257 FALSE, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_bitfield, /* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_PPC64_ADDR24", /* name */
262 FALSE, /* partial_inplace */
263 0, /* src_mask */
264 0x03fffffc, /* dst_mask */
265 FALSE), /* pcrel_offset */
266
267 /* A standard 16 bit relocation. */
268 HOWTO (R_PPC64_ADDR16, /* type */
269 0, /* rightshift */
270 1, /* size (0 = byte, 1 = short, 2 = long) */
271 16, /* bitsize */
272 FALSE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_bitfield, /* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_PPC64_ADDR16", /* name */
277 FALSE, /* partial_inplace */
278 0, /* src_mask */
279 0xffff, /* dst_mask */
280 FALSE), /* pcrel_offset */
281
282 /* A 16 bit relocation without overflow. */
283 HOWTO (R_PPC64_ADDR16_LO, /* type */
284 0, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_PPC64_ADDR16_LO", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* Bits 16-31 of an address. */
298 HOWTO (R_PPC64_ADDR16_HI, /* type */
299 16, /* rightshift */
300 1, /* size (0 = byte, 1 = short, 2 = long) */
301 16, /* bitsize */
302 FALSE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_dont, /* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_PPC64_ADDR16_HI", /* name */
307 FALSE, /* partial_inplace */
308 0, /* src_mask */
309 0xffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
311
312 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
313 bits, treated as a signed number, is negative. */
314 HOWTO (R_PPC64_ADDR16_HA, /* type */
315 16, /* rightshift */
316 1, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_dont, /* complain_on_overflow */
321 ppc64_elf_ha_reloc, /* special_function */
322 "R_PPC64_ADDR16_HA", /* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0xffff, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 /* An absolute 16 bit branch; the lower two bits must be zero.
329 FIXME: we don't check that, we just clear them. */
330 HOWTO (R_PPC64_ADDR14, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_branch_reloc, /* special_function */
338 "R_PPC64_ADDR14", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* An absolute 16 bit branch, for which bit 10 should be set to
345 indicate that the branch is expected to be taken. The lower two
346 bits must be zero. */
347 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 ppc64_elf_brtaken_reloc, /* special_function */
355 "R_PPC64_ADDR14_BRTAKEN",/* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x0000fffc, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* An absolute 16 bit branch, for which bit 10 should be set to
362 indicate that the branch is not expected to be taken. The lower
363 two bits must be zero. */
364 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
365 0, /* rightshift */
366 2, /* size (0 = byte, 1 = short, 2 = long) */
367 16, /* bitsize */
368 FALSE, /* pc_relative */
369 0, /* bitpos */
370 complain_overflow_bitfield, /* complain_on_overflow */
371 ppc64_elf_brtaken_reloc, /* special_function */
372 "R_PPC64_ADDR14_BRNTAKEN",/* name */
373 FALSE, /* partial_inplace */
374 0, /* src_mask */
375 0x0000fffc, /* dst_mask */
376 FALSE), /* pcrel_offset */
377
378 /* A relative 26 bit branch; the lower two bits must be zero. */
379 HOWTO (R_PPC64_REL24, /* type */
380 0, /* rightshift */
381 2, /* size (0 = byte, 1 = short, 2 = long) */
382 26, /* bitsize */
383 TRUE, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_signed, /* complain_on_overflow */
386 ppc64_elf_branch_reloc, /* special_function */
387 "R_PPC64_REL24", /* name */
388 FALSE, /* partial_inplace */
389 0, /* src_mask */
390 0x03fffffc, /* dst_mask */
391 TRUE), /* pcrel_offset */
392
393 /* A relative 16 bit branch; the lower two bits must be zero. */
394 HOWTO (R_PPC64_REL14, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_branch_reloc, /* special_function */
402 "R_PPC64_REL14", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* A relative 16 bit branch. Bit 10 should be set to indicate that
409 the branch is expected to be taken. The lower two bits must be
410 zero. */
411 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 TRUE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_REL14_BRTAKEN", /* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 TRUE), /* pcrel_offset */
424
425 /* A relative 16 bit branch. Bit 10 should be set to indicate that
426 the branch is not expected to be taken. The lower two bits must
427 be zero. */
428 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
429 0, /* rightshift */
430 2, /* size (0 = byte, 1 = short, 2 = long) */
431 16, /* bitsize */
432 TRUE, /* pc_relative */
433 0, /* bitpos */
434 complain_overflow_signed, /* complain_on_overflow */
435 ppc64_elf_brtaken_reloc, /* special_function */
436 "R_PPC64_REL14_BRNTAKEN",/* name */
437 FALSE, /* partial_inplace */
438 0, /* src_mask */
439 0x0000fffc, /* dst_mask */
440 TRUE), /* pcrel_offset */
441
442 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
443 symbol. */
444 HOWTO (R_PPC64_GOT16, /* type */
445 0, /* rightshift */
446 1, /* size (0 = byte, 1 = short, 2 = long) */
447 16, /* bitsize */
448 FALSE, /* pc_relative */
449 0, /* bitpos */
450 complain_overflow_signed, /* complain_on_overflow */
451 ppc64_elf_unhandled_reloc, /* special_function */
452 "R_PPC64_GOT16", /* name */
453 FALSE, /* partial_inplace */
454 0, /* src_mask */
455 0xffff, /* dst_mask */
456 FALSE), /* pcrel_offset */
457
458 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
459 the symbol. */
460 HOWTO (R_PPC64_GOT16_LO, /* type */
461 0, /* rightshift */
462 1, /* size (0 = byte, 1 = short, 2 = long) */
463 16, /* bitsize */
464 FALSE, /* pc_relative */
465 0, /* bitpos */
466 complain_overflow_dont, /* complain_on_overflow */
467 ppc64_elf_unhandled_reloc, /* special_function */
468 "R_PPC64_GOT16_LO", /* name */
469 FALSE, /* partial_inplace */
470 0, /* src_mask */
471 0xffff, /* dst_mask */
472 FALSE), /* pcrel_offset */
473
474 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
475 the symbol. */
476 HOWTO (R_PPC64_GOT16_HI, /* type */
477 16, /* rightshift */
478 1, /* size (0 = byte, 1 = short, 2 = long) */
479 16, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_dont,/* complain_on_overflow */
483 ppc64_elf_unhandled_reloc, /* special_function */
484 "R_PPC64_GOT16_HI", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0xffff, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
491 the symbol. */
492 HOWTO (R_PPC64_GOT16_HA, /* type */
493 16, /* rightshift */
494 1, /* size (0 = byte, 1 = short, 2 = long) */
495 16, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont,/* complain_on_overflow */
499 ppc64_elf_unhandled_reloc, /* special_function */
500 "R_PPC64_GOT16_HA", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* This is used only by the dynamic linker. The symbol should exist
507 both in the object being run and in some shared library. The
508 dynamic linker copies the data addressed by the symbol from the
509 shared library into the object, because the object being
510 run has to have the data at some particular address. */
511 HOWTO (R_PPC64_COPY, /* type */
512 0, /* rightshift */
513 0, /* this one is variable size */
514 0, /* bitsize */
515 FALSE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_dont, /* complain_on_overflow */
518 ppc64_elf_unhandled_reloc, /* special_function */
519 "R_PPC64_COPY", /* name */
520 FALSE, /* partial_inplace */
521 0, /* src_mask */
522 0, /* dst_mask */
523 FALSE), /* pcrel_offset */
524
525 /* Like R_PPC64_ADDR64, but used when setting global offset table
526 entries. */
527 HOWTO (R_PPC64_GLOB_DAT, /* type */
528 0, /* rightshift */
529 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
530 64, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_dont, /* complain_on_overflow */
534 ppc64_elf_unhandled_reloc, /* special_function */
535 "R_PPC64_GLOB_DAT", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 ONES (64), /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Created by the link editor. Marks a procedure linkage table
542 entry for a symbol. */
543 HOWTO (R_PPC64_JMP_SLOT, /* type */
544 0, /* rightshift */
545 0, /* size (0 = byte, 1 = short, 2 = long) */
546 0, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 ppc64_elf_unhandled_reloc, /* special_function */
551 "R_PPC64_JMP_SLOT", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 0, /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Used only by the dynamic linker. When the object is run, this
558 doubleword64 is set to the load address of the object, plus the
559 addend. */
560 HOWTO (R_PPC64_RELATIVE, /* type */
561 0, /* rightshift */
562 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
563 64, /* bitsize */
564 FALSE, /* pc_relative */
565 0, /* bitpos */
566 complain_overflow_dont, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 "R_PPC64_RELATIVE", /* name */
569 FALSE, /* partial_inplace */
570 0, /* src_mask */
571 ONES (64), /* dst_mask */
572 FALSE), /* pcrel_offset */
573
574 /* Like R_PPC64_ADDR32, but may be unaligned. */
575 HOWTO (R_PPC64_UADDR32, /* type */
576 0, /* rightshift */
577 2, /* size (0 = byte, 1 = short, 2 = long) */
578 32, /* bitsize */
579 FALSE, /* pc_relative */
580 0, /* bitpos */
581 complain_overflow_bitfield, /* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_PPC64_UADDR32", /* name */
584 FALSE, /* partial_inplace */
585 0, /* src_mask */
586 0xffffffff, /* dst_mask */
587 FALSE), /* pcrel_offset */
588
589 /* Like R_PPC64_ADDR16, but may be unaligned. */
590 HOWTO (R_PPC64_UADDR16, /* type */
591 0, /* rightshift */
592 1, /* size (0 = byte, 1 = short, 2 = long) */
593 16, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_bitfield, /* complain_on_overflow */
597 bfd_elf_generic_reloc, /* special_function */
598 "R_PPC64_UADDR16", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0xffff, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* 32-bit PC relative. */
605 HOWTO (R_PPC64_REL32, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 32, /* bitsize */
609 TRUE, /* pc_relative */
610 0, /* bitpos */
611 /* FIXME: Verify. Was complain_overflow_bitfield. */
612 complain_overflow_signed, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_PPC64_REL32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
619
620 /* 32-bit relocation to the symbol's procedure linkage table. */
621 HOWTO (R_PPC64_PLT32, /* type */
622 0, /* rightshift */
623 2, /* size (0 = byte, 1 = short, 2 = long) */
624 32, /* bitsize */
625 FALSE, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_bitfield, /* complain_on_overflow */
628 ppc64_elf_unhandled_reloc, /* special_function */
629 "R_PPC64_PLT32", /* name */
630 FALSE, /* partial_inplace */
631 0, /* src_mask */
632 0xffffffff, /* dst_mask */
633 FALSE), /* pcrel_offset */
634
635 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
636 FIXME: R_PPC64_PLTREL32 not supported. */
637 HOWTO (R_PPC64_PLTREL32, /* type */
638 0, /* rightshift */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
640 32, /* bitsize */
641 TRUE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_signed, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_PLTREL32", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffffffff, /* dst_mask */
649 TRUE), /* pcrel_offset */
650
651 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
652 the symbol. */
653 HOWTO (R_PPC64_PLT16_LO, /* type */
654 0, /* rightshift */
655 1, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 ppc64_elf_unhandled_reloc, /* special_function */
661 "R_PPC64_PLT16_LO", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0xffff, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
668 the symbol. */
669 HOWTO (R_PPC64_PLT16_HI, /* type */
670 16, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_dont, /* complain_on_overflow */
676 ppc64_elf_unhandled_reloc, /* special_function */
677 "R_PPC64_PLT16_HI", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
684 the symbol. */
685 HOWTO (R_PPC64_PLT16_HA, /* type */
686 16, /* rightshift */
687 1, /* size (0 = byte, 1 = short, 2 = long) */
688 16, /* bitsize */
689 FALSE, /* pc_relative */
690 0, /* bitpos */
691 complain_overflow_dont, /* complain_on_overflow */
692 ppc64_elf_unhandled_reloc, /* special_function */
693 "R_PPC64_PLT16_HA", /* name */
694 FALSE, /* partial_inplace */
695 0, /* src_mask */
696 0xffff, /* dst_mask */
697 FALSE), /* pcrel_offset */
698
699 /* 16-bit section relative relocation. */
700 HOWTO (R_PPC64_SECTOFF, /* type */
701 0, /* rightshift */
702 1, /* size (0 = byte, 1 = short, 2 = long) */
703 16, /* bitsize */
704 FALSE, /* pc_relative */
705 0, /* bitpos */
706 complain_overflow_bitfield, /* complain_on_overflow */
707 ppc64_elf_sectoff_reloc, /* special_function */
708 "R_PPC64_SECTOFF", /* name */
709 FALSE, /* partial_inplace */
710 0, /* src_mask */
711 0xffff, /* dst_mask */
712 FALSE), /* pcrel_offset */
713
714 /* Like R_PPC64_SECTOFF, but no overflow warning. */
715 HOWTO (R_PPC64_SECTOFF_LO, /* type */
716 0, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_dont, /* complain_on_overflow */
722 ppc64_elf_sectoff_reloc, /* special_function */
723 "R_PPC64_SECTOFF_LO", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* 16-bit upper half section relative relocation. */
730 HOWTO (R_PPC64_SECTOFF_HI, /* type */
731 16, /* rightshift */
732 1, /* size (0 = byte, 1 = short, 2 = long) */
733 16, /* bitsize */
734 FALSE, /* pc_relative */
735 0, /* bitpos */
736 complain_overflow_dont, /* complain_on_overflow */
737 ppc64_elf_sectoff_reloc, /* special_function */
738 "R_PPC64_SECTOFF_HI", /* name */
739 FALSE, /* partial_inplace */
740 0, /* src_mask */
741 0xffff, /* dst_mask */
742 FALSE), /* pcrel_offset */
743
744 /* 16-bit upper half adjusted section relative relocation. */
745 HOWTO (R_PPC64_SECTOFF_HA, /* type */
746 16, /* rightshift */
747 1, /* size (0 = byte, 1 = short, 2 = long) */
748 16, /* bitsize */
749 FALSE, /* pc_relative */
750 0, /* bitpos */
751 complain_overflow_dont, /* complain_on_overflow */
752 ppc64_elf_sectoff_ha_reloc, /* special_function */
753 "R_PPC64_SECTOFF_HA", /* name */
754 FALSE, /* partial_inplace */
755 0, /* src_mask */
756 0xffff, /* dst_mask */
757 FALSE), /* pcrel_offset */
758
759 /* Like R_PPC64_REL24 without touching the two least significant bits. */
760 HOWTO (R_PPC64_REL30, /* type */
761 2, /* rightshift */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
763 30, /* bitsize */
764 TRUE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_PPC64_REL30", /* name */
769 FALSE, /* partial_inplace */
770 0, /* src_mask */
771 0xfffffffc, /* dst_mask */
772 TRUE), /* pcrel_offset */
773
774 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
775
776 /* A standard 64-bit relocation. */
777 HOWTO (R_PPC64_ADDR64, /* type */
778 0, /* rightshift */
779 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
780 64, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_PPC64_ADDR64", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 ONES (64), /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 /* The bits 32-47 of an address. */
792 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
793 32, /* rightshift */
794 1, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 FALSE, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_PPC64_ADDR16_HIGHER", /* name */
801 FALSE, /* partial_inplace */
802 0, /* src_mask */
803 0xffff, /* dst_mask */
804 FALSE), /* pcrel_offset */
805
806 /* The bits 32-47 of an address, plus 1 if the contents of the low
807 16 bits, treated as a signed number, is negative. */
808 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
809 32, /* rightshift */
810 1, /* size (0 = byte, 1 = short, 2 = long) */
811 16, /* bitsize */
812 FALSE, /* pc_relative */
813 0, /* bitpos */
814 complain_overflow_dont, /* complain_on_overflow */
815 ppc64_elf_ha_reloc, /* special_function */
816 "R_PPC64_ADDR16_HIGHERA", /* name */
817 FALSE, /* partial_inplace */
818 0, /* src_mask */
819 0xffff, /* dst_mask */
820 FALSE), /* pcrel_offset */
821
822 /* The bits 48-63 of an address. */
823 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
824 48, /* rightshift */
825 1, /* size (0 = byte, 1 = short, 2 = long) */
826 16, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR16_HIGHEST", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 0xffff, /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 48-63 of an address, plus 1 if the contents of the low
838 16 bits, treated as a signed number, is negative. */
839 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
840 48, /* rightshift */
841 1, /* size (0 = byte, 1 = short, 2 = long) */
842 16, /* bitsize */
843 FALSE, /* pc_relative */
844 0, /* bitpos */
845 complain_overflow_dont, /* complain_on_overflow */
846 ppc64_elf_ha_reloc, /* special_function */
847 "R_PPC64_ADDR16_HIGHESTA", /* name */
848 FALSE, /* partial_inplace */
849 0, /* src_mask */
850 0xffff, /* dst_mask */
851 FALSE), /* pcrel_offset */
852
853 /* Like ADDR64, but may be unaligned. */
854 HOWTO (R_PPC64_UADDR64, /* type */
855 0, /* rightshift */
856 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
857 64, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 bfd_elf_generic_reloc, /* special_function */
862 "R_PPC64_UADDR64", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 ONES (64), /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* 64-bit relative relocation. */
869 HOWTO (R_PPC64_REL64, /* type */
870 0, /* rightshift */
871 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
872 64, /* bitsize */
873 TRUE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_REL64", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 ONES (64), /* dst_mask */
881 TRUE), /* pcrel_offset */
882
883 /* 64-bit relocation to the symbol's procedure linkage table. */
884 HOWTO (R_PPC64_PLT64, /* type */
885 0, /* rightshift */
886 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
887 64, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_dont, /* complain_on_overflow */
891 ppc64_elf_unhandled_reloc, /* special_function */
892 "R_PPC64_PLT64", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 ONES (64), /* dst_mask */
896 FALSE), /* pcrel_offset */
897
898 /* 64-bit PC relative relocation to the symbol's procedure linkage
899 table. */
900 /* FIXME: R_PPC64_PLTREL64 not supported. */
901 HOWTO (R_PPC64_PLTREL64, /* type */
902 0, /* rightshift */
903 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
904 64, /* bitsize */
905 TRUE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_dont, /* complain_on_overflow */
908 ppc64_elf_unhandled_reloc, /* special_function */
909 "R_PPC64_PLTREL64", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 ONES (64), /* dst_mask */
913 TRUE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation. */
916
917 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
918 HOWTO (R_PPC64_TOC16, /* type */
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_signed, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation without overflow. */
933
934 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_LO, /* type */
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_reloc, /* special_function */
943 "R_PPC64_TOC16_LO", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 16 bit TOC-relative relocation, high 16 bits. */
950
951 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
952 HOWTO (R_PPC64_TOC16_HI, /* type */
953 16, /* rightshift */
954 1, /* size (0 = byte, 1 = short, 2 = long) */
955 16, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_toc_reloc, /* special_function */
960 "R_PPC64_TOC16_HI", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 0xffff, /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
967 contents of the low 16 bits, treated as a signed number, is
968 negative. */
969
970 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
971 HOWTO (R_PPC64_TOC16_HA, /* type */
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc64_elf_toc_ha_reloc, /* special_function */
979 "R_PPC64_TOC16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* 64-bit relocation; insert value of TOC base (.TOC.). */
986
987 /* R_PPC64_TOC 51 doubleword64 .TOC. */
988 HOWTO (R_PPC64_TOC, /* type */
989 0, /* rightshift */
990 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
991 64, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_bitfield, /* complain_on_overflow */
995 ppc64_elf_toc64_reloc, /* special_function */
996 "R_PPC64_TOC", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 ONES (64), /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like R_PPC64_GOT16, but also informs the link editor that the
1003 value to relocate may (!) refer to a PLT entry which the link
1004 editor (a) may replace with the symbol value. If the link editor
1005 is unable to fully resolve the symbol, it may (b) create a PLT
1006 entry and store the address to the new PLT entry in the GOT.
1007 This permits lazy resolution of function symbols at run time.
1008 The link editor may also skip all of this and just (c) emit a
1009 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1010 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1011 HOWTO (R_PPC64_PLTGOT16, /* type */
1012 0, /* rightshift */
1013 1, /* size (0 = byte, 1 = short, 2 = long) */
1014 16, /* bitsize */
1015 FALSE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_signed, /* complain_on_overflow */
1018 ppc64_elf_unhandled_reloc, /* special_function */
1019 "R_PPC64_PLTGOT16", /* name */
1020 FALSE, /* partial_inplace */
1021 0, /* src_mask */
1022 0xffff, /* dst_mask */
1023 FALSE), /* pcrel_offset */
1024
1025 /* Like R_PPC64_PLTGOT16, but without overflow. */
1026 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1027 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1028 0, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc64_elf_unhandled_reloc, /* special_function */
1035 "R_PPC64_PLTGOT16_LO", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1042 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1043 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1044 16, /* rightshift */
1045 1, /* size (0 = byte, 1 = short, 2 = long) */
1046 16, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont, /* complain_on_overflow */
1050 ppc64_elf_unhandled_reloc, /* special_function */
1051 "R_PPC64_PLTGOT16_HI", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xffff, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1058 1 if the contents of the low 16 bits, treated as a signed number,
1059 is negative. */
1060 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1061 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1062 16, /* rightshift */
1063 1, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_dont,/* complain_on_overflow */
1068 ppc64_elf_unhandled_reloc, /* special_function */
1069 "R_PPC64_PLTGOT16_HA", /* name */
1070 FALSE, /* partial_inplace */
1071 0, /* src_mask */
1072 0xffff, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1076 HOWTO (R_PPC64_ADDR16_DS, /* type */
1077 0, /* rightshift */
1078 1, /* size (0 = byte, 1 = short, 2 = long) */
1079 16, /* bitsize */
1080 FALSE, /* pc_relative */
1081 0, /* bitpos */
1082 complain_overflow_bitfield, /* complain_on_overflow */
1083 bfd_elf_generic_reloc, /* special_function */
1084 "R_PPC64_ADDR16_DS", /* name */
1085 FALSE, /* partial_inplace */
1086 0, /* src_mask */
1087 0xfffc, /* dst_mask */
1088 FALSE), /* pcrel_offset */
1089
1090 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1091 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1092 0, /* rightshift */
1093 1, /* size (0 = byte, 1 = short, 2 = long) */
1094 16, /* bitsize */
1095 FALSE, /* pc_relative */
1096 0, /* bitpos */
1097 complain_overflow_dont,/* complain_on_overflow */
1098 bfd_elf_generic_reloc, /* special_function */
1099 "R_PPC64_ADDR16_LO_DS",/* name */
1100 FALSE, /* partial_inplace */
1101 0, /* src_mask */
1102 0xfffc, /* dst_mask */
1103 FALSE), /* pcrel_offset */
1104
1105 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1106 HOWTO (R_PPC64_GOT16_DS, /* type */
1107 0, /* rightshift */
1108 1, /* size (0 = byte, 1 = short, 2 = long) */
1109 16, /* bitsize */
1110 FALSE, /* pc_relative */
1111 0, /* bitpos */
1112 complain_overflow_signed, /* complain_on_overflow */
1113 ppc64_elf_unhandled_reloc, /* special_function */
1114 "R_PPC64_GOT16_DS", /* name */
1115 FALSE, /* partial_inplace */
1116 0, /* src_mask */
1117 0xfffc, /* dst_mask */
1118 FALSE), /* pcrel_offset */
1119
1120 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1121 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_dont, /* complain_on_overflow */
1128 ppc64_elf_unhandled_reloc, /* special_function */
1129 "R_PPC64_GOT16_LO_DS", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xfffc, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1136 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 ppc64_elf_unhandled_reloc, /* special_function */
1144 "R_PPC64_PLT16_LO_DS", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xfffc, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1151 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1152 0, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_bitfield, /* complain_on_overflow */
1158 ppc64_elf_sectoff_reloc, /* special_function */
1159 "R_PPC64_SECTOFF_DS", /* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xfffc, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1166 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1167 0, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 ppc64_elf_sectoff_reloc, /* special_function */
1174 "R_PPC64_SECTOFF_LO_DS",/* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xfffc, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1181 HOWTO (R_PPC64_TOC16_DS, /* type */
1182 0, /* rightshift */
1183 1, /* size (0 = byte, 1 = short, 2 = long) */
1184 16, /* bitsize */
1185 FALSE, /* pc_relative */
1186 0, /* bitpos */
1187 complain_overflow_signed, /* complain_on_overflow */
1188 ppc64_elf_toc_reloc, /* special_function */
1189 "R_PPC64_TOC16_DS", /* name */
1190 FALSE, /* partial_inplace */
1191 0, /* src_mask */
1192 0xfffc, /* dst_mask */
1193 FALSE), /* pcrel_offset */
1194
1195 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1196 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1197 0, /* rightshift */
1198 1, /* size (0 = byte, 1 = short, 2 = long) */
1199 16, /* bitsize */
1200 FALSE, /* pc_relative */
1201 0, /* bitpos */
1202 complain_overflow_dont, /* complain_on_overflow */
1203 ppc64_elf_toc_reloc, /* special_function */
1204 "R_PPC64_TOC16_LO_DS", /* name */
1205 FALSE, /* partial_inplace */
1206 0, /* src_mask */
1207 0xfffc, /* dst_mask */
1208 FALSE), /* pcrel_offset */
1209
1210 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1211 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1212 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_signed, /* complain_on_overflow */
1219 ppc64_elf_unhandled_reloc, /* special_function */
1220 "R_PPC64_PLTGOT16_DS", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1227 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1228 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1229 0, /* rightshift */
1230 1, /* size (0 = byte, 1 = short, 2 = long) */
1231 16, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 ppc64_elf_unhandled_reloc, /* special_function */
1236 "R_PPC64_PLTGOT16_LO_DS",/* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 0xfffc, /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* Marker relocs for TLS. */
1243 HOWTO (R_PPC64_TLS,
1244 0, /* rightshift */
1245 2, /* size (0 = byte, 1 = short, 2 = long) */
1246 32, /* bitsize */
1247 FALSE, /* pc_relative */
1248 0, /* bitpos */
1249 complain_overflow_dont, /* complain_on_overflow */
1250 bfd_elf_generic_reloc, /* special_function */
1251 "R_PPC64_TLS", /* name */
1252 FALSE, /* partial_inplace */
1253 0, /* src_mask */
1254 0, /* dst_mask */
1255 FALSE), /* pcrel_offset */
1256
1257 HOWTO (R_PPC64_TLSGD,
1258 0, /* rightshift */
1259 2, /* size (0 = byte, 1 = short, 2 = long) */
1260 32, /* bitsize */
1261 FALSE, /* pc_relative */
1262 0, /* bitpos */
1263 complain_overflow_dont, /* complain_on_overflow */
1264 bfd_elf_generic_reloc, /* special_function */
1265 "R_PPC64_TLSGD", /* name */
1266 FALSE, /* partial_inplace */
1267 0, /* src_mask */
1268 0, /* dst_mask */
1269 FALSE), /* pcrel_offset */
1270
1271 HOWTO (R_PPC64_TLSLD,
1272 0, /* rightshift */
1273 2, /* size (0 = byte, 1 = short, 2 = long) */
1274 32, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 bfd_elf_generic_reloc, /* special_function */
1279 "R_PPC64_TLSLD", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 0, /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 /* Computes the load module index of the load module that contains the
1286 definition of its TLS sym. */
1287 HOWTO (R_PPC64_DTPMOD64,
1288 0, /* rightshift */
1289 4, /* size (0 = byte, 1 = short, 2 = long) */
1290 64, /* bitsize */
1291 FALSE, /* pc_relative */
1292 0, /* bitpos */
1293 complain_overflow_dont, /* complain_on_overflow */
1294 ppc64_elf_unhandled_reloc, /* special_function */
1295 "R_PPC64_DTPMOD64", /* name */
1296 FALSE, /* partial_inplace */
1297 0, /* src_mask */
1298 ONES (64), /* dst_mask */
1299 FALSE), /* pcrel_offset */
1300
1301 /* Computes a dtv-relative displacement, the difference between the value
1302 of sym+add and the base address of the thread-local storage block that
1303 contains the definition of sym, minus 0x8000. */
1304 HOWTO (R_PPC64_DTPREL64,
1305 0, /* rightshift */
1306 4, /* size (0 = byte, 1 = short, 2 = long) */
1307 64, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_dont, /* complain_on_overflow */
1311 ppc64_elf_unhandled_reloc, /* special_function */
1312 "R_PPC64_DTPREL64", /* name */
1313 FALSE, /* partial_inplace */
1314 0, /* src_mask */
1315 ONES (64), /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 /* A 16 bit dtprel reloc. */
1319 HOWTO (R_PPC64_DTPREL16,
1320 0, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_signed, /* complain_on_overflow */
1326 ppc64_elf_unhandled_reloc, /* special_function */
1327 "R_PPC64_DTPREL16", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Like DTPREL16, but no overflow. */
1334 HOWTO (R_PPC64_DTPREL16_LO,
1335 0, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 ppc64_elf_unhandled_reloc, /* special_function */
1342 "R_PPC64_DTPREL16_LO", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1349 HOWTO (R_PPC64_DTPREL16_HI,
1350 16, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 ppc64_elf_unhandled_reloc, /* special_function */
1357 "R_PPC64_DTPREL16_HI", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1364 HOWTO (R_PPC64_DTPREL16_HA,
1365 16, /* rightshift */
1366 1, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL16_HA", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1379 HOWTO (R_PPC64_DTPREL16_HIGHER,
1380 32, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_dont, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16_HIGHER", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1394 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1395 32, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_dont, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_HIGHERA", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1409 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1410 48, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_dont, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_HIGHEST", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1424 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1425 48, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_dont, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like DTPREL16, but for insns with a DS field. */
1439 HOWTO (R_PPC64_DTPREL16_DS,
1440 0, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_signed, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_DTPREL16_DS", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xfffc, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like DTPREL16_DS, but no overflow. */
1454 HOWTO (R_PPC64_DTPREL16_LO_DS,
1455 0, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_DTPREL16_LO_DS", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xfffc, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Computes a tp-relative displacement, the difference between the value of
1469 sym+add and the value of the thread pointer (r13). */
1470 HOWTO (R_PPC64_TPREL64,
1471 0, /* rightshift */
1472 4, /* size (0 = byte, 1 = short, 2 = long) */
1473 64, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 ppc64_elf_unhandled_reloc, /* special_function */
1478 "R_PPC64_TPREL64", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 ONES (64), /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* A 16 bit tprel reloc. */
1485 HOWTO (R_PPC64_TPREL16,
1486 0, /* rightshift */
1487 1, /* size (0 = byte, 1 = short, 2 = long) */
1488 16, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_signed, /* complain_on_overflow */
1492 ppc64_elf_unhandled_reloc, /* special_function */
1493 "R_PPC64_TPREL16", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0xffff, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Like TPREL16, but no overflow. */
1500 HOWTO (R_PPC64_TPREL16_LO,
1501 0, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_dont, /* complain_on_overflow */
1507 ppc64_elf_unhandled_reloc, /* special_function */
1508 "R_PPC64_TPREL16_LO", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 /* Like TPREL16_LO, but next higher group of 16 bits. */
1515 HOWTO (R_PPC64_TPREL16_HI,
1516 16, /* rightshift */
1517 1, /* size (0 = byte, 1 = short, 2 = long) */
1518 16, /* bitsize */
1519 FALSE, /* pc_relative */
1520 0, /* bitpos */
1521 complain_overflow_dont, /* complain_on_overflow */
1522 ppc64_elf_unhandled_reloc, /* special_function */
1523 "R_PPC64_TPREL16_HI", /* name */
1524 FALSE, /* partial_inplace */
1525 0, /* src_mask */
1526 0xffff, /* dst_mask */
1527 FALSE), /* pcrel_offset */
1528
1529 /* Like TPREL16_HI, but adjust for low 16 bits. */
1530 HOWTO (R_PPC64_TPREL16_HA,
1531 16, /* rightshift */
1532 1, /* size (0 = byte, 1 = short, 2 = long) */
1533 16, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL16_HA", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 0xffff, /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* Like TPREL16_HI, but next higher group of 16 bits. */
1545 HOWTO (R_PPC64_TPREL16_HIGHER,
1546 32, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_dont, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16_HIGHER", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1560 HOWTO (R_PPC64_TPREL16_HIGHERA,
1561 32, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_HIGHERA", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1575 HOWTO (R_PPC64_TPREL16_HIGHEST,
1576 48, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_dont, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_HIGHEST", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1590 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1591 48, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_dont, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_TPREL16_HIGHESTA", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like TPREL16, but for insns with a DS field. */
1605 HOWTO (R_PPC64_TPREL16_DS,
1606 0, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_signed, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_TPREL16_DS", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xfffc, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like TPREL16_DS, but no overflow. */
1620 HOWTO (R_PPC64_TPREL16_LO_DS,
1621 0, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_TPREL16_LO_DS", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xfffc, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1635 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1636 to the first entry relative to the TOC base (r2). */
1637 HOWTO (R_PPC64_GOT_TLSGD16,
1638 0, /* rightshift */
1639 1, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 FALSE, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_signed, /* complain_on_overflow */
1644 ppc64_elf_unhandled_reloc, /* special_function */
1645 "R_PPC64_GOT_TLSGD16", /* name */
1646 FALSE, /* partial_inplace */
1647 0, /* src_mask */
1648 0xffff, /* dst_mask */
1649 FALSE), /* pcrel_offset */
1650
1651 /* Like GOT_TLSGD16, but no overflow. */
1652 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1653 0, /* rightshift */
1654 1, /* size (0 = byte, 1 = short, 2 = long) */
1655 16, /* bitsize */
1656 FALSE, /* pc_relative */
1657 0, /* bitpos */
1658 complain_overflow_dont, /* complain_on_overflow */
1659 ppc64_elf_unhandled_reloc, /* special_function */
1660 "R_PPC64_GOT_TLSGD16_LO", /* name */
1661 FALSE, /* partial_inplace */
1662 0, /* src_mask */
1663 0xffff, /* dst_mask */
1664 FALSE), /* pcrel_offset */
1665
1666 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1667 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1668 16, /* rightshift */
1669 1, /* size (0 = byte, 1 = short, 2 = long) */
1670 16, /* bitsize */
1671 FALSE, /* pc_relative */
1672 0, /* bitpos */
1673 complain_overflow_dont, /* complain_on_overflow */
1674 ppc64_elf_unhandled_reloc, /* special_function */
1675 "R_PPC64_GOT_TLSGD16_HI", /* name */
1676 FALSE, /* partial_inplace */
1677 0, /* src_mask */
1678 0xffff, /* dst_mask */
1679 FALSE), /* pcrel_offset */
1680
1681 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1682 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1683 16, /* rightshift */
1684 1, /* size (0 = byte, 1 = short, 2 = long) */
1685 16, /* bitsize */
1686 FALSE, /* pc_relative */
1687 0, /* bitpos */
1688 complain_overflow_dont, /* complain_on_overflow */
1689 ppc64_elf_unhandled_reloc, /* special_function */
1690 "R_PPC64_GOT_TLSGD16_HA", /* name */
1691 FALSE, /* partial_inplace */
1692 0, /* src_mask */
1693 0xffff, /* dst_mask */
1694 FALSE), /* pcrel_offset */
1695
1696 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1697 with values (sym+add)@dtpmod and zero, and computes the offset to the
1698 first entry relative to the TOC base (r2). */
1699 HOWTO (R_PPC64_GOT_TLSLD16,
1700 0, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_signed, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_TLSLD16", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xffff, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Like GOT_TLSLD16, but no overflow. */
1714 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1715 0, /* rightshift */
1716 1, /* size (0 = byte, 1 = short, 2 = long) */
1717 16, /* bitsize */
1718 FALSE, /* pc_relative */
1719 0, /* bitpos */
1720 complain_overflow_dont, /* complain_on_overflow */
1721 ppc64_elf_unhandled_reloc, /* special_function */
1722 "R_PPC64_GOT_TLSLD16_LO", /* name */
1723 FALSE, /* partial_inplace */
1724 0, /* src_mask */
1725 0xffff, /* dst_mask */
1726 FALSE), /* pcrel_offset */
1727
1728 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1729 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1730 16, /* rightshift */
1731 1, /* size (0 = byte, 1 = short, 2 = long) */
1732 16, /* bitsize */
1733 FALSE, /* pc_relative */
1734 0, /* bitpos */
1735 complain_overflow_dont, /* complain_on_overflow */
1736 ppc64_elf_unhandled_reloc, /* special_function */
1737 "R_PPC64_GOT_TLSLD16_HI", /* name */
1738 FALSE, /* partial_inplace */
1739 0, /* src_mask */
1740 0xffff, /* dst_mask */
1741 FALSE), /* pcrel_offset */
1742
1743 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1744 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1745 16, /* rightshift */
1746 1, /* size (0 = byte, 1 = short, 2 = long) */
1747 16, /* bitsize */
1748 FALSE, /* pc_relative */
1749 0, /* bitpos */
1750 complain_overflow_dont, /* complain_on_overflow */
1751 ppc64_elf_unhandled_reloc, /* special_function */
1752 "R_PPC64_GOT_TLSLD16_HA", /* name */
1753 FALSE, /* partial_inplace */
1754 0, /* src_mask */
1755 0xffff, /* dst_mask */
1756 FALSE), /* pcrel_offset */
1757
1758 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1759 the offset to the entry relative to the TOC base (r2). */
1760 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1761 0, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_signed, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_DTPREL16_DS", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xfffc, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Like GOT_DTPREL16_DS, but no overflow. */
1775 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1776 0, /* rightshift */
1777 1, /* size (0 = byte, 1 = short, 2 = long) */
1778 16, /* bitsize */
1779 FALSE, /* pc_relative */
1780 0, /* bitpos */
1781 complain_overflow_dont, /* complain_on_overflow */
1782 ppc64_elf_unhandled_reloc, /* special_function */
1783 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1784 FALSE, /* partial_inplace */
1785 0, /* src_mask */
1786 0xfffc, /* dst_mask */
1787 FALSE), /* pcrel_offset */
1788
1789 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1790 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1791 16, /* rightshift */
1792 1, /* size (0 = byte, 1 = short, 2 = long) */
1793 16, /* bitsize */
1794 FALSE, /* pc_relative */
1795 0, /* bitpos */
1796 complain_overflow_dont, /* complain_on_overflow */
1797 ppc64_elf_unhandled_reloc, /* special_function */
1798 "R_PPC64_GOT_DTPREL16_HI", /* name */
1799 FALSE, /* partial_inplace */
1800 0, /* src_mask */
1801 0xffff, /* dst_mask */
1802 FALSE), /* pcrel_offset */
1803
1804 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1805 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1806 16, /* rightshift */
1807 1, /* size (0 = byte, 1 = short, 2 = long) */
1808 16, /* bitsize */
1809 FALSE, /* pc_relative */
1810 0, /* bitpos */
1811 complain_overflow_dont, /* complain_on_overflow */
1812 ppc64_elf_unhandled_reloc, /* special_function */
1813 "R_PPC64_GOT_DTPREL16_HA", /* name */
1814 FALSE, /* partial_inplace */
1815 0, /* src_mask */
1816 0xffff, /* dst_mask */
1817 FALSE), /* pcrel_offset */
1818
1819 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1820 offset to the entry relative to the TOC base (r2). */
1821 HOWTO (R_PPC64_GOT_TPREL16_DS,
1822 0, /* rightshift */
1823 1, /* size (0 = byte, 1 = short, 2 = long) */
1824 16, /* bitsize */
1825 FALSE, /* pc_relative */
1826 0, /* bitpos */
1827 complain_overflow_signed, /* complain_on_overflow */
1828 ppc64_elf_unhandled_reloc, /* special_function */
1829 "R_PPC64_GOT_TPREL16_DS", /* name */
1830 FALSE, /* partial_inplace */
1831 0, /* src_mask */
1832 0xfffc, /* dst_mask */
1833 FALSE), /* pcrel_offset */
1834
1835 /* Like GOT_TPREL16_DS, but no overflow. */
1836 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1837 0, /* rightshift */
1838 1, /* size (0 = byte, 1 = short, 2 = long) */
1839 16, /* bitsize */
1840 FALSE, /* pc_relative */
1841 0, /* bitpos */
1842 complain_overflow_dont, /* complain_on_overflow */
1843 ppc64_elf_unhandled_reloc, /* special_function */
1844 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1845 FALSE, /* partial_inplace */
1846 0, /* src_mask */
1847 0xfffc, /* dst_mask */
1848 FALSE), /* pcrel_offset */
1849
1850 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1851 HOWTO (R_PPC64_GOT_TPREL16_HI,
1852 16, /* rightshift */
1853 1, /* size (0 = byte, 1 = short, 2 = long) */
1854 16, /* bitsize */
1855 FALSE, /* pc_relative */
1856 0, /* bitpos */
1857 complain_overflow_dont, /* complain_on_overflow */
1858 ppc64_elf_unhandled_reloc, /* special_function */
1859 "R_PPC64_GOT_TPREL16_HI", /* name */
1860 FALSE, /* partial_inplace */
1861 0, /* src_mask */
1862 0xffff, /* dst_mask */
1863 FALSE), /* pcrel_offset */
1864
1865 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1866 HOWTO (R_PPC64_GOT_TPREL16_HA,
1867 16, /* rightshift */
1868 1, /* size (0 = byte, 1 = short, 2 = long) */
1869 16, /* bitsize */
1870 FALSE, /* pc_relative */
1871 0, /* bitpos */
1872 complain_overflow_dont, /* complain_on_overflow */
1873 ppc64_elf_unhandled_reloc, /* special_function */
1874 "R_PPC64_GOT_TPREL16_HA", /* name */
1875 FALSE, /* partial_inplace */
1876 0, /* src_mask */
1877 0xffff, /* dst_mask */
1878 FALSE), /* pcrel_offset */
1879
1880 HOWTO (R_PPC64_JMP_IREL, /* type */
1881 0, /* rightshift */
1882 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1883 0, /* bitsize */
1884 FALSE, /* pc_relative */
1885 0, /* bitpos */
1886 complain_overflow_dont, /* complain_on_overflow */
1887 ppc64_elf_unhandled_reloc, /* special_function */
1888 "R_PPC64_JMP_IREL", /* name */
1889 FALSE, /* partial_inplace */
1890 0, /* src_mask */
1891 0, /* dst_mask */
1892 FALSE), /* pcrel_offset */
1893
1894 HOWTO (R_PPC64_IRELATIVE, /* type */
1895 0, /* rightshift */
1896 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1897 64, /* bitsize */
1898 FALSE, /* pc_relative */
1899 0, /* bitpos */
1900 complain_overflow_dont, /* complain_on_overflow */
1901 bfd_elf_generic_reloc, /* special_function */
1902 "R_PPC64_IRELATIVE", /* name */
1903 FALSE, /* partial_inplace */
1904 0, /* src_mask */
1905 ONES (64), /* dst_mask */
1906 FALSE), /* pcrel_offset */
1907
1908 /* A 16 bit relative relocation. */
1909 HOWTO (R_PPC64_REL16, /* type */
1910 0, /* rightshift */
1911 1, /* size (0 = byte, 1 = short, 2 = long) */
1912 16, /* bitsize */
1913 TRUE, /* pc_relative */
1914 0, /* bitpos */
1915 complain_overflow_bitfield, /* complain_on_overflow */
1916 bfd_elf_generic_reloc, /* special_function */
1917 "R_PPC64_REL16", /* name */
1918 FALSE, /* partial_inplace */
1919 0, /* src_mask */
1920 0xffff, /* dst_mask */
1921 TRUE), /* pcrel_offset */
1922
1923 /* A 16 bit relative relocation without overflow. */
1924 HOWTO (R_PPC64_REL16_LO, /* type */
1925 0, /* rightshift */
1926 1, /* size (0 = byte, 1 = short, 2 = long) */
1927 16, /* bitsize */
1928 TRUE, /* pc_relative */
1929 0, /* bitpos */
1930 complain_overflow_dont,/* complain_on_overflow */
1931 bfd_elf_generic_reloc, /* special_function */
1932 "R_PPC64_REL16_LO", /* name */
1933 FALSE, /* partial_inplace */
1934 0, /* src_mask */
1935 0xffff, /* dst_mask */
1936 TRUE), /* pcrel_offset */
1937
1938 /* The high order 16 bits of a relative address. */
1939 HOWTO (R_PPC64_REL16_HI, /* type */
1940 16, /* rightshift */
1941 1, /* size (0 = byte, 1 = short, 2 = long) */
1942 16, /* bitsize */
1943 TRUE, /* pc_relative */
1944 0, /* bitpos */
1945 complain_overflow_dont, /* complain_on_overflow */
1946 bfd_elf_generic_reloc, /* special_function */
1947 "R_PPC64_REL16_HI", /* name */
1948 FALSE, /* partial_inplace */
1949 0, /* src_mask */
1950 0xffff, /* dst_mask */
1951 TRUE), /* pcrel_offset */
1952
1953 /* The high order 16 bits of a relative address, plus 1 if the contents of
1954 the low 16 bits, treated as a signed number, is negative. */
1955 HOWTO (R_PPC64_REL16_HA, /* type */
1956 16, /* rightshift */
1957 1, /* size (0 = byte, 1 = short, 2 = long) */
1958 16, /* bitsize */
1959 TRUE, /* pc_relative */
1960 0, /* bitpos */
1961 complain_overflow_dont, /* complain_on_overflow */
1962 ppc64_elf_ha_reloc, /* special_function */
1963 "R_PPC64_REL16_HA", /* name */
1964 FALSE, /* partial_inplace */
1965 0, /* src_mask */
1966 0xffff, /* dst_mask */
1967 TRUE), /* pcrel_offset */
1968
1969 /* GNU extension to record C++ vtable hierarchy. */
1970 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1971 0, /* rightshift */
1972 0, /* size (0 = byte, 1 = short, 2 = long) */
1973 0, /* bitsize */
1974 FALSE, /* pc_relative */
1975 0, /* bitpos */
1976 complain_overflow_dont, /* complain_on_overflow */
1977 NULL, /* special_function */
1978 "R_PPC64_GNU_VTINHERIT", /* name */
1979 FALSE, /* partial_inplace */
1980 0, /* src_mask */
1981 0, /* dst_mask */
1982 FALSE), /* pcrel_offset */
1983
1984 /* GNU extension to record C++ vtable member usage. */
1985 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1986 0, /* rightshift */
1987 0, /* size (0 = byte, 1 = short, 2 = long) */
1988 0, /* bitsize */
1989 FALSE, /* pc_relative */
1990 0, /* bitpos */
1991 complain_overflow_dont, /* complain_on_overflow */
1992 NULL, /* special_function */
1993 "R_PPC64_GNU_VTENTRY", /* name */
1994 FALSE, /* partial_inplace */
1995 0, /* src_mask */
1996 0, /* dst_mask */
1997 FALSE), /* pcrel_offset */
1998 };
1999
2000 \f
2001 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2002 be done. */
2003
2004 static void
2005 ppc_howto_init (void)
2006 {
2007 unsigned int i, type;
2008
2009 for (i = 0;
2010 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2011 i++)
2012 {
2013 type = ppc64_elf_howto_raw[i].type;
2014 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2015 / sizeof (ppc64_elf_howto_table[0])));
2016 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2017 }
2018 }
2019
2020 static reloc_howto_type *
2021 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2022 bfd_reloc_code_real_type code)
2023 {
2024 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2025
2026 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2027 /* Initialize howto table if needed. */
2028 ppc_howto_init ();
2029
2030 switch (code)
2031 {
2032 default:
2033 return NULL;
2034
2035 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2036 break;
2037 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2038 break;
2039 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2040 break;
2041 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2042 break;
2043 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2044 break;
2045 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2046 break;
2047 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2048 break;
2049 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2050 break;
2051 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2052 break;
2053 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2054 break;
2055 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2056 break;
2057 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2058 break;
2059 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2060 break;
2061 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2062 break;
2063 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2064 break;
2065 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2066 break;
2067 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2068 break;
2069 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2070 break;
2071 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2072 break;
2073 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2074 break;
2075 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2076 break;
2077 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2078 break;
2079 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2080 break;
2081 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2082 break;
2083 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2084 break;
2085 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2086 break;
2087 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2088 break;
2089 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2090 break;
2091 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2092 break;
2093 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2094 break;
2095 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2096 break;
2097 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2098 break;
2099 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2100 break;
2101 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2102 break;
2103 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2104 break;
2105 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2106 break;
2107 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2108 break;
2109 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2110 break;
2111 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2112 break;
2113 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2114 break;
2115 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2116 break;
2117 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2118 break;
2119 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2120 break;
2121 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2122 break;
2123 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2124 break;
2125 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2126 break;
2127 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2128 break;
2129 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2130 break;
2131 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2132 break;
2133 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2134 break;
2135 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2136 break;
2137 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2138 break;
2139 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2140 break;
2141 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2142 break;
2143 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2144 break;
2145 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2146 break;
2147 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2148 break;
2149 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2150 break;
2151 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2152 break;
2153 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2154 break;
2155 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2156 break;
2157 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2158 break;
2159 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2160 break;
2161 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2162 break;
2163 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2164 break;
2165 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2166 break;
2167 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2168 break;
2169 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2170 break;
2171 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2172 break;
2173 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2174 break;
2175 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2176 break;
2177 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2178 break;
2179 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2180 break;
2181 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2182 break;
2183 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2184 break;
2185 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2186 break;
2187 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2188 break;
2189 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2190 break;
2191 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2192 break;
2193 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2194 break;
2195 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2196 break;
2197 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2198 break;
2199 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2200 break;
2201 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2202 break;
2203 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2204 break;
2205 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2206 break;
2207 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2208 break;
2209 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2210 break;
2211 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2212 break;
2213 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2214 break;
2215 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2216 break;
2217 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2218 break;
2219 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2220 break;
2221 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2222 break;
2223 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2224 break;
2225 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2226 break;
2227 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2228 break;
2229 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2230 break;
2231 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2232 break;
2233 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2234 break;
2235 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2236 break;
2237 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2238 break;
2239 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2240 break;
2241 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2242 break;
2243 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2244 break;
2245 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2246 break;
2247 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2248 break;
2249 }
2250
2251 return ppc64_elf_howto_table[r];
2252 };
2253
2254 static reloc_howto_type *
2255 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2256 const char *r_name)
2257 {
2258 unsigned int i;
2259
2260 for (i = 0;
2261 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2262 i++)
2263 if (ppc64_elf_howto_raw[i].name != NULL
2264 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2265 return &ppc64_elf_howto_raw[i];
2266
2267 return NULL;
2268 }
2269
2270 /* Set the howto pointer for a PowerPC ELF reloc. */
2271
2272 static void
2273 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2274 Elf_Internal_Rela *dst)
2275 {
2276 unsigned int type;
2277
2278 /* Initialize howto table if needed. */
2279 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2280 ppc_howto_init ();
2281
2282 type = ELF64_R_TYPE (dst->r_info);
2283 if (type >= (sizeof (ppc64_elf_howto_table)
2284 / sizeof (ppc64_elf_howto_table[0])))
2285 {
2286 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2287 abfd, (int) type);
2288 type = R_PPC64_NONE;
2289 }
2290 cache_ptr->howto = ppc64_elf_howto_table[type];
2291 }
2292
2293 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2294
2295 static bfd_reloc_status_type
2296 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2297 void *data, asection *input_section,
2298 bfd *output_bfd, char **error_message)
2299 {
2300 /* If this is a relocatable link (output_bfd test tells us), just
2301 call the generic function. Any adjustment will be done at final
2302 link time. */
2303 if (output_bfd != NULL)
2304 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2305 input_section, output_bfd, error_message);
2306
2307 /* Adjust the addend for sign extension of the low 16 bits.
2308 We won't actually be using the low 16 bits, so trashing them
2309 doesn't matter. */
2310 reloc_entry->addend += 0x8000;
2311 return bfd_reloc_continue;
2312 }
2313
2314 static bfd_reloc_status_type
2315 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2316 void *data, asection *input_section,
2317 bfd *output_bfd, char **error_message)
2318 {
2319 if (output_bfd != NULL)
2320 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2321 input_section, output_bfd, error_message);
2322
2323 if (strcmp (symbol->section->name, ".opd") == 0
2324 && (symbol->section->owner->flags & DYNAMIC) == 0)
2325 {
2326 bfd_vma dest = opd_entry_value (symbol->section,
2327 symbol->value + reloc_entry->addend,
2328 NULL, NULL);
2329 if (dest != (bfd_vma) -1)
2330 reloc_entry->addend = dest - (symbol->value
2331 + symbol->section->output_section->vma
2332 + symbol->section->output_offset);
2333 }
2334 return bfd_reloc_continue;
2335 }
2336
2337 static bfd_reloc_status_type
2338 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2339 void *data, asection *input_section,
2340 bfd *output_bfd, char **error_message)
2341 {
2342 long insn;
2343 enum elf_ppc64_reloc_type r_type;
2344 bfd_size_type octets;
2345 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2346 bfd_boolean is_power4 = FALSE;
2347
2348 /* If this is a relocatable link (output_bfd test tells us), just
2349 call the generic function. Any adjustment will be done at final
2350 link time. */
2351 if (output_bfd != NULL)
2352 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2353 input_section, output_bfd, error_message);
2354
2355 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2356 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2357 insn &= ~(0x01 << 21);
2358 r_type = reloc_entry->howto->type;
2359 if (r_type == R_PPC64_ADDR14_BRTAKEN
2360 || r_type == R_PPC64_REL14_BRTAKEN)
2361 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2362
2363 if (is_power4)
2364 {
2365 /* Set 'a' bit. This is 0b00010 in BO field for branch
2366 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2367 for branch on CTR insns (BO == 1a00t or 1a01t). */
2368 if ((insn & (0x14 << 21)) == (0x04 << 21))
2369 insn |= 0x02 << 21;
2370 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2371 insn |= 0x08 << 21;
2372 else
2373 goto out;
2374 }
2375 else
2376 {
2377 bfd_vma target = 0;
2378 bfd_vma from;
2379
2380 if (!bfd_is_com_section (symbol->section))
2381 target = symbol->value;
2382 target += symbol->section->output_section->vma;
2383 target += symbol->section->output_offset;
2384 target += reloc_entry->addend;
2385
2386 from = (reloc_entry->address
2387 + input_section->output_offset
2388 + input_section->output_section->vma);
2389
2390 /* Invert 'y' bit if not the default. */
2391 if ((bfd_signed_vma) (target - from) < 0)
2392 insn ^= 0x01 << 21;
2393 }
2394 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2395 out:
2396 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2397 input_section, output_bfd, error_message);
2398 }
2399
2400 static bfd_reloc_status_type
2401 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2402 void *data, asection *input_section,
2403 bfd *output_bfd, char **error_message)
2404 {
2405 /* If this is a relocatable link (output_bfd test tells us), just
2406 call the generic function. Any adjustment will be done at final
2407 link time. */
2408 if (output_bfd != NULL)
2409 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2410 input_section, output_bfd, error_message);
2411
2412 /* Subtract the symbol section base address. */
2413 reloc_entry->addend -= symbol->section->output_section->vma;
2414 return bfd_reloc_continue;
2415 }
2416
2417 static bfd_reloc_status_type
2418 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2419 void *data, asection *input_section,
2420 bfd *output_bfd, char **error_message)
2421 {
2422 /* If this is a relocatable link (output_bfd test tells us), just
2423 call the generic function. Any adjustment will be done at final
2424 link time. */
2425 if (output_bfd != NULL)
2426 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2427 input_section, output_bfd, error_message);
2428
2429 /* Subtract the symbol section base address. */
2430 reloc_entry->addend -= symbol->section->output_section->vma;
2431
2432 /* Adjust the addend for sign extension of the low 16 bits. */
2433 reloc_entry->addend += 0x8000;
2434 return bfd_reloc_continue;
2435 }
2436
2437 static bfd_reloc_status_type
2438 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2439 void *data, asection *input_section,
2440 bfd *output_bfd, char **error_message)
2441 {
2442 bfd_vma TOCstart;
2443
2444 /* If this is a relocatable link (output_bfd test tells us), just
2445 call the generic function. Any adjustment will be done at final
2446 link time. */
2447 if (output_bfd != NULL)
2448 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2449 input_section, output_bfd, error_message);
2450
2451 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2452 if (TOCstart == 0)
2453 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2454
2455 /* Subtract the TOC base address. */
2456 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2457 return bfd_reloc_continue;
2458 }
2459
2460 static bfd_reloc_status_type
2461 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2462 void *data, asection *input_section,
2463 bfd *output_bfd, char **error_message)
2464 {
2465 bfd_vma TOCstart;
2466
2467 /* If this is a relocatable link (output_bfd test tells us), just
2468 call the generic function. Any adjustment will be done at final
2469 link time. */
2470 if (output_bfd != NULL)
2471 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2472 input_section, output_bfd, error_message);
2473
2474 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2475 if (TOCstart == 0)
2476 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2477
2478 /* Subtract the TOC base address. */
2479 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2480
2481 /* Adjust the addend for sign extension of the low 16 bits. */
2482 reloc_entry->addend += 0x8000;
2483 return bfd_reloc_continue;
2484 }
2485
2486 static bfd_reloc_status_type
2487 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2488 void *data, asection *input_section,
2489 bfd *output_bfd, char **error_message)
2490 {
2491 bfd_vma TOCstart;
2492 bfd_size_type octets;
2493
2494 /* If this is a relocatable link (output_bfd test tells us), just
2495 call the generic function. Any adjustment will be done at final
2496 link time. */
2497 if (output_bfd != NULL)
2498 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2499 input_section, output_bfd, error_message);
2500
2501 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2502 if (TOCstart == 0)
2503 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2504
2505 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2506 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2507 return bfd_reloc_ok;
2508 }
2509
2510 static bfd_reloc_status_type
2511 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2512 void *data, asection *input_section,
2513 bfd *output_bfd, char **error_message)
2514 {
2515 /* If this is a relocatable link (output_bfd test tells us), just
2516 call the generic function. Any adjustment will be done at final
2517 link time. */
2518 if (output_bfd != NULL)
2519 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2520 input_section, output_bfd, error_message);
2521
2522 if (error_message != NULL)
2523 {
2524 static char buf[60];
2525 sprintf (buf, "generic linker can't handle %s",
2526 reloc_entry->howto->name);
2527 *error_message = buf;
2528 }
2529 return bfd_reloc_dangerous;
2530 }
2531
2532 /* Track GOT entries needed for a given symbol. We might need more
2533 than one got entry per symbol. */
2534 struct got_entry
2535 {
2536 struct got_entry *next;
2537
2538 /* The symbol addend that we'll be placing in the GOT. */
2539 bfd_vma addend;
2540
2541 /* Unlike other ELF targets, we use separate GOT entries for the same
2542 symbol referenced from different input files. This is to support
2543 automatic multiple TOC/GOT sections, where the TOC base can vary
2544 from one input file to another. After partitioning into TOC groups
2545 we merge entries within the group.
2546
2547 Point to the BFD owning this GOT entry. */
2548 bfd *owner;
2549
2550 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2551 TLS_TPREL or TLS_DTPREL for tls entries. */
2552 unsigned char tls_type;
2553
2554 /* Non-zero if got.ent points to real entry. */
2555 unsigned char is_indirect;
2556
2557 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2558 union
2559 {
2560 bfd_signed_vma refcount;
2561 bfd_vma offset;
2562 struct got_entry *ent;
2563 } got;
2564 };
2565
2566 /* The same for PLT. */
2567 struct plt_entry
2568 {
2569 struct plt_entry *next;
2570
2571 bfd_vma addend;
2572
2573 union
2574 {
2575 bfd_signed_vma refcount;
2576 bfd_vma offset;
2577 } plt;
2578 };
2579
2580 struct ppc64_elf_obj_tdata
2581 {
2582 struct elf_obj_tdata elf;
2583
2584 /* Shortcuts to dynamic linker sections. */
2585 asection *got;
2586 asection *relgot;
2587
2588 /* Used during garbage collection. We attach global symbols defined
2589 on removed .opd entries to this section so that the sym is removed. */
2590 asection *deleted_section;
2591
2592 /* TLS local dynamic got entry handling. Support for multiple GOT
2593 sections means we potentially need one of these for each input bfd. */
2594 struct got_entry tlsld_got;
2595
2596 /* A copy of relocs before they are modified for --emit-relocs. */
2597 Elf_Internal_Rela *opd_relocs;
2598
2599 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2600 the reloc to be in the range -32768 to 32767. */
2601 unsigned int has_small_toc_reloc;
2602 };
2603
2604 #define ppc64_elf_tdata(bfd) \
2605 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2606
2607 #define ppc64_tlsld_got(bfd) \
2608 (&ppc64_elf_tdata (bfd)->tlsld_got)
2609
2610 #define is_ppc64_elf(bfd) \
2611 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2612 && elf_object_id (bfd) == PPC64_ELF_DATA)
2613
2614 /* Override the generic function because we store some extras. */
2615
2616 static bfd_boolean
2617 ppc64_elf_mkobject (bfd *abfd)
2618 {
2619 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2620 PPC64_ELF_DATA);
2621 }
2622
2623 /* Fix bad default arch selected for a 64 bit input bfd when the
2624 default is 32 bit. */
2625
2626 static bfd_boolean
2627 ppc64_elf_object_p (bfd *abfd)
2628 {
2629 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2630 {
2631 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2632
2633 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2634 {
2635 /* Relies on arch after 32 bit default being 64 bit default. */
2636 abfd->arch_info = abfd->arch_info->next;
2637 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2638 }
2639 }
2640 return TRUE;
2641 }
2642
2643 /* Support for core dump NOTE sections. */
2644
2645 static bfd_boolean
2646 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2647 {
2648 size_t offset, size;
2649
2650 if (note->descsz != 504)
2651 return FALSE;
2652
2653 /* pr_cursig */
2654 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2655
2656 /* pr_pid */
2657 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2658
2659 /* pr_reg */
2660 offset = 112;
2661 size = 384;
2662
2663 /* Make a ".reg/999" section. */
2664 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2665 size, note->descpos + offset);
2666 }
2667
2668 static bfd_boolean
2669 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2670 {
2671 if (note->descsz != 136)
2672 return FALSE;
2673
2674 elf_tdata (abfd)->core_pid
2675 = bfd_get_32 (abfd, note->descdata + 24);
2676 elf_tdata (abfd)->core_program
2677 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2678 elf_tdata (abfd)->core_command
2679 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2680
2681 return TRUE;
2682 }
2683
2684 static char *
2685 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2686 ...)
2687 {
2688 switch (note_type)
2689 {
2690 default:
2691 return NULL;
2692
2693 case NT_PRPSINFO:
2694 {
2695 char data[136];
2696 va_list ap;
2697
2698 va_start (ap, note_type);
2699 memset (data, 0, 40);
2700 strncpy (data + 40, va_arg (ap, const char *), 16);
2701 strncpy (data + 56, va_arg (ap, const char *), 80);
2702 va_end (ap);
2703 return elfcore_write_note (abfd, buf, bufsiz,
2704 "CORE", note_type, data, sizeof (data));
2705 }
2706
2707 case NT_PRSTATUS:
2708 {
2709 char data[504];
2710 va_list ap;
2711 long pid;
2712 int cursig;
2713 const void *greg;
2714
2715 va_start (ap, note_type);
2716 memset (data, 0, 112);
2717 pid = va_arg (ap, long);
2718 bfd_put_32 (abfd, pid, data + 32);
2719 cursig = va_arg (ap, int);
2720 bfd_put_16 (abfd, cursig, data + 12);
2721 greg = va_arg (ap, const void *);
2722 memcpy (data + 112, greg, 384);
2723 memset (data + 496, 0, 8);
2724 va_end (ap);
2725 return elfcore_write_note (abfd, buf, bufsiz,
2726 "CORE", note_type, data, sizeof (data));
2727 }
2728 }
2729 }
2730
2731 /* Add extra PPC sections. */
2732
2733 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2734 {
2735 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2736 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2737 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2738 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2739 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2740 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2741 { NULL, 0, 0, 0, 0 }
2742 };
2743
2744 enum _ppc64_sec_type {
2745 sec_normal = 0,
2746 sec_opd = 1,
2747 sec_toc = 2
2748 };
2749
2750 struct _ppc64_elf_section_data
2751 {
2752 struct bfd_elf_section_data elf;
2753
2754 union
2755 {
2756 /* An array with one entry for each opd function descriptor. */
2757 struct _opd_sec_data
2758 {
2759 /* Points to the function code section for local opd entries. */
2760 asection **func_sec;
2761
2762 /* After editing .opd, adjust references to opd local syms. */
2763 long *adjust;
2764 } opd;
2765
2766 /* An array for toc sections, indexed by offset/8. */
2767 struct _toc_sec_data
2768 {
2769 /* Specifies the relocation symbol index used at a given toc offset. */
2770 unsigned *symndx;
2771
2772 /* And the relocation addend. */
2773 bfd_vma *add;
2774 } toc;
2775 } u;
2776
2777 enum _ppc64_sec_type sec_type:2;
2778
2779 /* Flag set when small branches are detected. Used to
2780 select suitable defaults for the stub group size. */
2781 unsigned int has_14bit_branch:1;
2782 };
2783
2784 #define ppc64_elf_section_data(sec) \
2785 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2786
2787 static bfd_boolean
2788 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2789 {
2790 if (!sec->used_by_bfd)
2791 {
2792 struct _ppc64_elf_section_data *sdata;
2793 bfd_size_type amt = sizeof (*sdata);
2794
2795 sdata = bfd_zalloc (abfd, amt);
2796 if (sdata == NULL)
2797 return FALSE;
2798 sec->used_by_bfd = sdata;
2799 }
2800
2801 return _bfd_elf_new_section_hook (abfd, sec);
2802 }
2803
2804 static struct _opd_sec_data *
2805 get_opd_info (asection * sec)
2806 {
2807 if (sec != NULL
2808 && ppc64_elf_section_data (sec) != NULL
2809 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2810 return &ppc64_elf_section_data (sec)->u.opd;
2811 return NULL;
2812 }
2813 \f
2814 /* Parameters for the qsort hook. */
2815 static bfd_boolean synthetic_relocatable;
2816
2817 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2818
2819 static int
2820 compare_symbols (const void *ap, const void *bp)
2821 {
2822 const asymbol *a = * (const asymbol **) ap;
2823 const asymbol *b = * (const asymbol **) bp;
2824
2825 /* Section symbols first. */
2826 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2827 return -1;
2828 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2829 return 1;
2830
2831 /* then .opd symbols. */
2832 if (strcmp (a->section->name, ".opd") == 0
2833 && strcmp (b->section->name, ".opd") != 0)
2834 return -1;
2835 if (strcmp (a->section->name, ".opd") != 0
2836 && strcmp (b->section->name, ".opd") == 0)
2837 return 1;
2838
2839 /* then other code symbols. */
2840 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2841 == (SEC_CODE | SEC_ALLOC)
2842 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2843 != (SEC_CODE | SEC_ALLOC))
2844 return -1;
2845
2846 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2847 != (SEC_CODE | SEC_ALLOC)
2848 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2849 == (SEC_CODE | SEC_ALLOC))
2850 return 1;
2851
2852 if (synthetic_relocatable)
2853 {
2854 if (a->section->id < b->section->id)
2855 return -1;
2856
2857 if (a->section->id > b->section->id)
2858 return 1;
2859 }
2860
2861 if (a->value + a->section->vma < b->value + b->section->vma)
2862 return -1;
2863
2864 if (a->value + a->section->vma > b->value + b->section->vma)
2865 return 1;
2866
2867 /* For syms with the same value, prefer strong dynamic global function
2868 syms over other syms. */
2869 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2870 return -1;
2871
2872 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2873 return 1;
2874
2875 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2876 return -1;
2877
2878 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2879 return 1;
2880
2881 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2882 return -1;
2883
2884 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2885 return 1;
2886
2887 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2888 return -1;
2889
2890 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2891 return 1;
2892
2893 return 0;
2894 }
2895
2896 /* Search SYMS for a symbol of the given VALUE. */
2897
2898 static asymbol *
2899 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2900 {
2901 long mid;
2902
2903 if (id == -1)
2904 {
2905 while (lo < hi)
2906 {
2907 mid = (lo + hi) >> 1;
2908 if (syms[mid]->value + syms[mid]->section->vma < value)
2909 lo = mid + 1;
2910 else if (syms[mid]->value + syms[mid]->section->vma > value)
2911 hi = mid;
2912 else
2913 return syms[mid];
2914 }
2915 }
2916 else
2917 {
2918 while (lo < hi)
2919 {
2920 mid = (lo + hi) >> 1;
2921 if (syms[mid]->section->id < id)
2922 lo = mid + 1;
2923 else if (syms[mid]->section->id > id)
2924 hi = mid;
2925 else if (syms[mid]->value < value)
2926 lo = mid + 1;
2927 else if (syms[mid]->value > value)
2928 hi = mid;
2929 else
2930 return syms[mid];
2931 }
2932 }
2933 return NULL;
2934 }
2935
2936 static bfd_boolean
2937 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2938 {
2939 bfd_vma vma = *(bfd_vma *) ptr;
2940 return ((section->flags & SEC_ALLOC) != 0
2941 && section->vma <= vma
2942 && vma < section->vma + section->size);
2943 }
2944
2945 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2946 entry syms. Also generate @plt symbols for the glink branch table. */
2947
2948 static long
2949 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2950 long static_count, asymbol **static_syms,
2951 long dyn_count, asymbol **dyn_syms,
2952 asymbol **ret)
2953 {
2954 asymbol *s;
2955 long i;
2956 long count;
2957 char *names;
2958 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2959 asection *opd;
2960 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2961 asymbol **syms;
2962
2963 *ret = NULL;
2964
2965 opd = bfd_get_section_by_name (abfd, ".opd");
2966 if (opd == NULL)
2967 return 0;
2968
2969 symcount = static_count;
2970 if (!relocatable)
2971 symcount += dyn_count;
2972 if (symcount == 0)
2973 return 0;
2974
2975 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2976 if (syms == NULL)
2977 return -1;
2978
2979 if (!relocatable && static_count != 0 && dyn_count != 0)
2980 {
2981 /* Use both symbol tables. */
2982 memcpy (syms, static_syms, static_count * sizeof (*syms));
2983 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2984 }
2985 else if (!relocatable && static_count == 0)
2986 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2987 else
2988 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2989
2990 synthetic_relocatable = relocatable;
2991 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2992
2993 if (!relocatable && symcount > 1)
2994 {
2995 long j;
2996 /* Trim duplicate syms, since we may have merged the normal and
2997 dynamic symbols. Actually, we only care about syms that have
2998 different values, so trim any with the same value. */
2999 for (i = 1, j = 1; i < symcount; ++i)
3000 if (syms[i - 1]->value + syms[i - 1]->section->vma
3001 != syms[i]->value + syms[i]->section->vma)
3002 syms[j++] = syms[i];
3003 symcount = j;
3004 }
3005
3006 i = 0;
3007 if (strcmp (syms[i]->section->name, ".opd") == 0)
3008 ++i;
3009 codesecsym = i;
3010
3011 for (; i < symcount; ++i)
3012 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3013 != (SEC_CODE | SEC_ALLOC))
3014 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3015 break;
3016 codesecsymend = i;
3017
3018 for (; i < symcount; ++i)
3019 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3020 break;
3021 secsymend = i;
3022
3023 for (; i < symcount; ++i)
3024 if (strcmp (syms[i]->section->name, ".opd") != 0)
3025 break;
3026 opdsymend = i;
3027
3028 for (; i < symcount; ++i)
3029 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3030 != (SEC_CODE | SEC_ALLOC))
3031 break;
3032 symcount = i;
3033
3034 count = 0;
3035
3036 if (relocatable)
3037 {
3038 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3039 arelent *r;
3040 size_t size;
3041 long relcount;
3042
3043 if (opdsymend == secsymend)
3044 goto done;
3045
3046 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3047 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3048 if (relcount == 0)
3049 goto done;
3050
3051 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3052 {
3053 count = -1;
3054 goto done;
3055 }
3056
3057 size = 0;
3058 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3059 {
3060 asymbol *sym;
3061
3062 while (r < opd->relocation + relcount
3063 && r->address < syms[i]->value + opd->vma)
3064 ++r;
3065
3066 if (r == opd->relocation + relcount)
3067 break;
3068
3069 if (r->address != syms[i]->value + opd->vma)
3070 continue;
3071
3072 if (r->howto->type != R_PPC64_ADDR64)
3073 continue;
3074
3075 sym = *r->sym_ptr_ptr;
3076 if (!sym_exists_at (syms, opdsymend, symcount,
3077 sym->section->id, sym->value + r->addend))
3078 {
3079 ++count;
3080 size += sizeof (asymbol);
3081 size += strlen (syms[i]->name) + 2;
3082 }
3083 }
3084
3085 s = *ret = bfd_malloc (size);
3086 if (s == NULL)
3087 {
3088 count = -1;
3089 goto done;
3090 }
3091
3092 names = (char *) (s + count);
3093
3094 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3095 {
3096 asymbol *sym;
3097
3098 while (r < opd->relocation + relcount
3099 && r->address < syms[i]->value + opd->vma)
3100 ++r;
3101
3102 if (r == opd->relocation + relcount)
3103 break;
3104
3105 if (r->address != syms[i]->value + opd->vma)
3106 continue;
3107
3108 if (r->howto->type != R_PPC64_ADDR64)
3109 continue;
3110
3111 sym = *r->sym_ptr_ptr;
3112 if (!sym_exists_at (syms, opdsymend, symcount,
3113 sym->section->id, sym->value + r->addend))
3114 {
3115 size_t len;
3116
3117 *s = *syms[i];
3118 s->flags |= BSF_SYNTHETIC;
3119 s->section = sym->section;
3120 s->value = sym->value + r->addend;
3121 s->name = names;
3122 *names++ = '.';
3123 len = strlen (syms[i]->name);
3124 memcpy (names, syms[i]->name, len + 1);
3125 names += len + 1;
3126 /* Have udata.p point back to the original symbol this
3127 synthetic symbol was derived from. */
3128 s->udata.p = syms[i];
3129 s++;
3130 }
3131 }
3132 }
3133 else
3134 {
3135 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3136 bfd_byte *contents;
3137 size_t size;
3138 long plt_count = 0;
3139 bfd_vma glink_vma = 0, resolv_vma = 0;
3140 asection *dynamic, *glink = NULL, *relplt = NULL;
3141 arelent *p;
3142
3143 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3144 {
3145 if (contents)
3146 {
3147 free_contents_and_exit:
3148 free (contents);
3149 }
3150 count = -1;
3151 goto done;
3152 }
3153
3154 size = 0;
3155 for (i = secsymend; i < opdsymend; ++i)
3156 {
3157 bfd_vma ent;
3158
3159 /* Ignore bogus symbols. */
3160 if (syms[i]->value > opd->size - 8)
3161 continue;
3162
3163 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3164 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3165 {
3166 ++count;
3167 size += sizeof (asymbol);
3168 size += strlen (syms[i]->name) + 2;
3169 }
3170 }
3171
3172 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3173 if (dyn_count != 0
3174 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3175 {
3176 bfd_byte *dynbuf, *extdyn, *extdynend;
3177 size_t extdynsize;
3178 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3179
3180 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3181 goto free_contents_and_exit;
3182
3183 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3184 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3185
3186 extdyn = dynbuf;
3187 extdynend = extdyn + dynamic->size;
3188 for (; extdyn < extdynend; extdyn += extdynsize)
3189 {
3190 Elf_Internal_Dyn dyn;
3191 (*swap_dyn_in) (abfd, extdyn, &dyn);
3192
3193 if (dyn.d_tag == DT_NULL)
3194 break;
3195
3196 if (dyn.d_tag == DT_PPC64_GLINK)
3197 {
3198 /* The first glink stub starts at offset 32; see comment in
3199 ppc64_elf_finish_dynamic_sections. */
3200 glink_vma = dyn.d_un.d_val + 32;
3201 /* The .glink section usually does not survive the final
3202 link; search for the section (usually .text) where the
3203 glink stubs now reside. */
3204 glink = bfd_sections_find_if (abfd, section_covers_vma,
3205 &glink_vma);
3206 break;
3207 }
3208 }
3209
3210 free (dynbuf);
3211 }
3212
3213 if (glink != NULL)
3214 {
3215 /* Determine __glink trampoline by reading the relative branch
3216 from the first glink stub. */
3217 bfd_byte buf[4];
3218 if (bfd_get_section_contents (abfd, glink, buf,
3219 glink_vma + 4 - glink->vma, 4))
3220 {
3221 unsigned int insn = bfd_get_32 (abfd, buf);
3222 insn ^= B_DOT;
3223 if ((insn & ~0x3fffffc) == 0)
3224 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3225 }
3226
3227 if (resolv_vma)
3228 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3229
3230 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3231 if (relplt != NULL)
3232 {
3233 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3234 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3235 goto free_contents_and_exit;
3236
3237 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3238 size += plt_count * sizeof (asymbol);
3239
3240 p = relplt->relocation;
3241 for (i = 0; i < plt_count; i++, p++)
3242 {
3243 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3244 if (p->addend != 0)
3245 size += sizeof ("+0x") - 1 + 16;
3246 }
3247 }
3248 }
3249
3250 s = *ret = bfd_malloc (size);
3251 if (s == NULL)
3252 goto free_contents_and_exit;
3253
3254 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3255
3256 for (i = secsymend; i < opdsymend; ++i)
3257 {
3258 bfd_vma ent;
3259
3260 if (syms[i]->value > opd->size - 8)
3261 continue;
3262
3263 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3264 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3265 {
3266 long lo, hi;
3267 size_t len;
3268 asection *sec = abfd->sections;
3269
3270 *s = *syms[i];
3271 lo = codesecsym;
3272 hi = codesecsymend;
3273 while (lo < hi)
3274 {
3275 long mid = (lo + hi) >> 1;
3276 if (syms[mid]->section->vma < ent)
3277 lo = mid + 1;
3278 else if (syms[mid]->section->vma > ent)
3279 hi = mid;
3280 else
3281 {
3282 sec = syms[mid]->section;
3283 break;
3284 }
3285 }
3286
3287 if (lo >= hi && lo > codesecsym)
3288 sec = syms[lo - 1]->section;
3289
3290 for (; sec != NULL; sec = sec->next)
3291 {
3292 if (sec->vma > ent)
3293 break;
3294 /* SEC_LOAD may not be set if SEC is from a separate debug
3295 info file. */
3296 if ((sec->flags & SEC_ALLOC) == 0)
3297 break;
3298 if ((sec->flags & SEC_CODE) != 0)
3299 s->section = sec;
3300 }
3301 s->flags |= BSF_SYNTHETIC;
3302 s->value = ent - s->section->vma;
3303 s->name = names;
3304 *names++ = '.';
3305 len = strlen (syms[i]->name);
3306 memcpy (names, syms[i]->name, len + 1);
3307 names += len + 1;
3308 /* Have udata.p point back to the original symbol this
3309 synthetic symbol was derived from. */
3310 s->udata.p = syms[i];
3311 s++;
3312 }
3313 }
3314 free (contents);
3315
3316 if (glink != NULL && relplt != NULL)
3317 {
3318 if (resolv_vma)
3319 {
3320 /* Add a symbol for the main glink trampoline. */
3321 memset (s, 0, sizeof *s);
3322 s->the_bfd = abfd;
3323 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3324 s->section = glink;
3325 s->value = resolv_vma - glink->vma;
3326 s->name = names;
3327 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3328 names += sizeof ("__glink_PLTresolve");
3329 s++;
3330 count++;
3331 }
3332
3333 /* FIXME: It would be very much nicer to put sym@plt on the
3334 stub rather than on the glink branch table entry. The
3335 objdump disassembler would then use a sensible symbol
3336 name on plt calls. The difficulty in doing so is
3337 a) finding the stubs, and,
3338 b) matching stubs against plt entries, and,
3339 c) there can be multiple stubs for a given plt entry.
3340
3341 Solving (a) could be done by code scanning, but older
3342 ppc64 binaries used different stubs to current code.
3343 (b) is the tricky one since you need to known the toc
3344 pointer for at least one function that uses a pic stub to
3345 be able to calculate the plt address referenced.
3346 (c) means gdb would need to set multiple breakpoints (or
3347 find the glink branch itself) when setting breakpoints
3348 for pending shared library loads. */
3349 p = relplt->relocation;
3350 for (i = 0; i < plt_count; i++, p++)
3351 {
3352 size_t len;
3353
3354 *s = **p->sym_ptr_ptr;
3355 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3356 we are defining a symbol, ensure one of them is set. */
3357 if ((s->flags & BSF_LOCAL) == 0)
3358 s->flags |= BSF_GLOBAL;
3359 s->flags |= BSF_SYNTHETIC;
3360 s->section = glink;
3361 s->value = glink_vma - glink->vma;
3362 s->name = names;
3363 s->udata.p = NULL;
3364 len = strlen ((*p->sym_ptr_ptr)->name);
3365 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3366 names += len;
3367 if (p->addend != 0)
3368 {
3369 memcpy (names, "+0x", sizeof ("+0x") - 1);
3370 names += sizeof ("+0x") - 1;
3371 bfd_sprintf_vma (abfd, names, p->addend);
3372 names += strlen (names);
3373 }
3374 memcpy (names, "@plt", sizeof ("@plt"));
3375 names += sizeof ("@plt");
3376 s++;
3377 glink_vma += 8;
3378 if (i >= 0x8000)
3379 glink_vma += 4;
3380 }
3381 count += plt_count;
3382 }
3383 }
3384
3385 done:
3386 free (syms);
3387 return count;
3388 }
3389 \f
3390 /* The following functions are specific to the ELF linker, while
3391 functions above are used generally. Those named ppc64_elf_* are
3392 called by the main ELF linker code. They appear in this file more
3393 or less in the order in which they are called. eg.
3394 ppc64_elf_check_relocs is called early in the link process,
3395 ppc64_elf_finish_dynamic_sections is one of the last functions
3396 called.
3397
3398 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3399 functions have both a function code symbol and a function descriptor
3400 symbol. A call to foo in a relocatable object file looks like:
3401
3402 . .text
3403 . x:
3404 . bl .foo
3405 . nop
3406
3407 The function definition in another object file might be:
3408
3409 . .section .opd
3410 . foo: .quad .foo
3411 . .quad .TOC.@tocbase
3412 . .quad 0
3413 .
3414 . .text
3415 . .foo: blr
3416
3417 When the linker resolves the call during a static link, the branch
3418 unsurprisingly just goes to .foo and the .opd information is unused.
3419 If the function definition is in a shared library, things are a little
3420 different: The call goes via a plt call stub, the opd information gets
3421 copied to the plt, and the linker patches the nop.
3422
3423 . x:
3424 . bl .foo_stub
3425 . ld 2,40(1)
3426 .
3427 .
3428 . .foo_stub:
3429 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3430 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3431 . std 2,40(1) # this is the general idea
3432 . ld 11,0(12)
3433 . ld 2,8(12)
3434 . mtctr 11
3435 . ld 11,16(12)
3436 . bctr
3437 .
3438 . .section .plt
3439 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3440
3441 The "reloc ()" notation is supposed to indicate that the linker emits
3442 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3443 copying.
3444
3445 What are the difficulties here? Well, firstly, the relocations
3446 examined by the linker in check_relocs are against the function code
3447 sym .foo, while the dynamic relocation in the plt is emitted against
3448 the function descriptor symbol, foo. Somewhere along the line, we need
3449 to carefully copy dynamic link information from one symbol to the other.
3450 Secondly, the generic part of the elf linker will make .foo a dynamic
3451 symbol as is normal for most other backends. We need foo dynamic
3452 instead, at least for an application final link. However, when
3453 creating a shared library containing foo, we need to have both symbols
3454 dynamic so that references to .foo are satisfied during the early
3455 stages of linking. Otherwise the linker might decide to pull in a
3456 definition from some other object, eg. a static library.
3457
3458 Update: As of August 2004, we support a new convention. Function
3459 calls may use the function descriptor symbol, ie. "bl foo". This
3460 behaves exactly as "bl .foo". */
3461
3462 /* Of those relocs that might be copied as dynamic relocs, this function
3463 selects those that must be copied when linking a shared library,
3464 even when the symbol is local. */
3465
3466 static int
3467 must_be_dyn_reloc (struct bfd_link_info *info,
3468 enum elf_ppc64_reloc_type r_type)
3469 {
3470 switch (r_type)
3471 {
3472 default:
3473 return 1;
3474
3475 case R_PPC64_REL32:
3476 case R_PPC64_REL64:
3477 case R_PPC64_REL30:
3478 return 0;
3479
3480 case R_PPC64_TPREL16:
3481 case R_PPC64_TPREL16_LO:
3482 case R_PPC64_TPREL16_HI:
3483 case R_PPC64_TPREL16_HA:
3484 case R_PPC64_TPREL16_DS:
3485 case R_PPC64_TPREL16_LO_DS:
3486 case R_PPC64_TPREL16_HIGHER:
3487 case R_PPC64_TPREL16_HIGHERA:
3488 case R_PPC64_TPREL16_HIGHEST:
3489 case R_PPC64_TPREL16_HIGHESTA:
3490 case R_PPC64_TPREL64:
3491 return !info->executable;
3492 }
3493 }
3494
3495 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3496 copying dynamic variables from a shared lib into an app's dynbss
3497 section, and instead use a dynamic relocation to point into the
3498 shared lib. With code that gcc generates, it's vital that this be
3499 enabled; In the PowerPC64 ABI, the address of a function is actually
3500 the address of a function descriptor, which resides in the .opd
3501 section. gcc uses the descriptor directly rather than going via the
3502 GOT as some other ABI's do, which means that initialized function
3503 pointers must reference the descriptor. Thus, a function pointer
3504 initialized to the address of a function in a shared library will
3505 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3506 redefines the function descriptor symbol to point to the copy. This
3507 presents a problem as a plt entry for that function is also
3508 initialized from the function descriptor symbol and the copy reloc
3509 may not be initialized first. */
3510 #define ELIMINATE_COPY_RELOCS 1
3511
3512 /* Section name for stubs is the associated section name plus this
3513 string. */
3514 #define STUB_SUFFIX ".stub"
3515
3516 /* Linker stubs.
3517 ppc_stub_long_branch:
3518 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3519 destination, but a 24 bit branch in a stub section will reach.
3520 . b dest
3521
3522 ppc_stub_plt_branch:
3523 Similar to the above, but a 24 bit branch in the stub section won't
3524 reach its destination.
3525 . addis %r12,%r2,xxx@toc@ha
3526 . ld %r11,xxx@toc@l(%r12)
3527 . mtctr %r11
3528 . bctr
3529
3530 ppc_stub_plt_call:
3531 Used to call a function in a shared library. If it so happens that
3532 the plt entry referenced crosses a 64k boundary, then an extra
3533 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3534 . addis %r12,%r2,xxx@toc@ha
3535 . std %r2,40(%r1)
3536 . ld %r11,xxx+0@toc@l(%r12)
3537 . mtctr %r11
3538 . ld %r2,xxx+8@toc@l(%r12)
3539 . ld %r11,xxx+16@toc@l(%r12)
3540 . bctr
3541
3542 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3543 code to adjust the value and save r2 to support multiple toc sections.
3544 A ppc_stub_long_branch with an r2 offset looks like:
3545 . std %r2,40(%r1)
3546 . addis %r2,%r2,off@ha
3547 . addi %r2,%r2,off@l
3548 . b dest
3549
3550 A ppc_stub_plt_branch with an r2 offset looks like:
3551 . std %r2,40(%r1)
3552 . addis %r12,%r2,xxx@toc@ha
3553 . ld %r11,xxx@toc@l(%r12)
3554 . addis %r2,%r2,off@ha
3555 . addi %r2,%r2,off@l
3556 . mtctr %r11
3557 . bctr
3558
3559 In cases where the "addis" instruction would add zero, the "addis" is
3560 omitted and following instructions modified slightly in some cases.
3561 */
3562
3563 enum ppc_stub_type {
3564 ppc_stub_none,
3565 ppc_stub_long_branch,
3566 ppc_stub_long_branch_r2off,
3567 ppc_stub_plt_branch,
3568 ppc_stub_plt_branch_r2off,
3569 ppc_stub_plt_call
3570 };
3571
3572 struct ppc_stub_hash_entry {
3573
3574 /* Base hash table entry structure. */
3575 struct bfd_hash_entry root;
3576
3577 enum ppc_stub_type stub_type;
3578
3579 /* The stub section. */
3580 asection *stub_sec;
3581
3582 /* Offset within stub_sec of the beginning of this stub. */
3583 bfd_vma stub_offset;
3584
3585 /* Given the symbol's value and its section we can determine its final
3586 value when building the stubs (so the stub knows where to jump. */
3587 bfd_vma target_value;
3588 asection *target_section;
3589
3590 /* The symbol table entry, if any, that this was derived from. */
3591 struct ppc_link_hash_entry *h;
3592 struct plt_entry *plt_ent;
3593
3594 /* And the reloc addend that this was derived from. */
3595 bfd_vma addend;
3596
3597 /* Where this stub is being called from, or, in the case of combined
3598 stub sections, the first input section in the group. */
3599 asection *id_sec;
3600 };
3601
3602 struct ppc_branch_hash_entry {
3603
3604 /* Base hash table entry structure. */
3605 struct bfd_hash_entry root;
3606
3607 /* Offset within branch lookup table. */
3608 unsigned int offset;
3609
3610 /* Generation marker. */
3611 unsigned int iter;
3612 };
3613
3614 struct ppc_link_hash_entry
3615 {
3616 struct elf_link_hash_entry elf;
3617
3618 union {
3619 /* A pointer to the most recently used stub hash entry against this
3620 symbol. */
3621 struct ppc_stub_hash_entry *stub_cache;
3622
3623 /* A pointer to the next symbol starting with a '.' */
3624 struct ppc_link_hash_entry *next_dot_sym;
3625 } u;
3626
3627 /* Track dynamic relocs copied for this symbol. */
3628 struct elf_dyn_relocs *dyn_relocs;
3629
3630 /* Link between function code and descriptor symbols. */
3631 struct ppc_link_hash_entry *oh;
3632
3633 /* Flag function code and descriptor symbols. */
3634 unsigned int is_func:1;
3635 unsigned int is_func_descriptor:1;
3636 unsigned int fake:1;
3637
3638 /* Whether global opd/toc sym has been adjusted or not.
3639 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3640 should be set for all globals defined in any opd/toc section. */
3641 unsigned int adjust_done:1;
3642
3643 /* Set if we twiddled this symbol to weak at some stage. */
3644 unsigned int was_undefined:1;
3645
3646 /* Contexts in which symbol is used in the GOT (or TOC).
3647 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3648 corresponding relocs are encountered during check_relocs.
3649 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3650 indicate the corresponding GOT entry type is not needed.
3651 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3652 a TPREL one. We use a separate flag rather than setting TPREL
3653 just for convenience in distinguishing the two cases. */
3654 #define TLS_GD 1 /* GD reloc. */
3655 #define TLS_LD 2 /* LD reloc. */
3656 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3657 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3658 #define TLS_TLS 16 /* Any TLS reloc. */
3659 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3660 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3661 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3662 unsigned char tls_mask;
3663 };
3664
3665 /* ppc64 ELF linker hash table. */
3666
3667 struct ppc_link_hash_table
3668 {
3669 struct elf_link_hash_table elf;
3670
3671 /* The stub hash table. */
3672 struct bfd_hash_table stub_hash_table;
3673
3674 /* Another hash table for plt_branch stubs. */
3675 struct bfd_hash_table branch_hash_table;
3676
3677 /* Linker stub bfd. */
3678 bfd *stub_bfd;
3679
3680 /* Linker call-backs. */
3681 asection * (*add_stub_section) (const char *, asection *);
3682 void (*layout_sections_again) (void);
3683
3684 /* Array to keep track of which stub sections have been created, and
3685 information on stub grouping. */
3686 struct map_stub {
3687 /* This is the section to which stubs in the group will be attached. */
3688 asection *link_sec;
3689 /* The stub section. */
3690 asection *stub_sec;
3691 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3692 bfd_vma toc_off;
3693 } *stub_group;
3694
3695 /* Temp used when calculating TOC pointers. */
3696 bfd_vma toc_curr;
3697 bfd *toc_bfd;
3698 asection *toc_first_sec;
3699
3700 /* Highest input section id. */
3701 int top_id;
3702
3703 /* Highest output section index. */
3704 int top_index;
3705
3706 /* Used when adding symbols. */
3707 struct ppc_link_hash_entry *dot_syms;
3708
3709 /* List of input sections for each output section. */
3710 asection **input_list;
3711
3712 /* Short-cuts to get to dynamic linker sections. */
3713 asection *got;
3714 asection *plt;
3715 asection *relplt;
3716 asection *iplt;
3717 asection *reliplt;
3718 asection *dynbss;
3719 asection *relbss;
3720 asection *glink;
3721 asection *sfpr;
3722 asection *brlt;
3723 asection *relbrlt;
3724 asection *glink_eh_frame;
3725
3726 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3727 struct ppc_link_hash_entry *tls_get_addr;
3728 struct ppc_link_hash_entry *tls_get_addr_fd;
3729
3730 /* The size of reliplt used by got entry relocs. */
3731 bfd_size_type got_reli_size;
3732
3733 /* Statistics. */
3734 unsigned long stub_count[ppc_stub_plt_call];
3735
3736 /* Number of stubs against global syms. */
3737 unsigned long stub_globals;
3738
3739 /* Set if PLT call stubs should load r11. */
3740 unsigned int plt_static_chain:1;
3741
3742 /* Set if we should emit symbols for stubs. */
3743 unsigned int emit_stub_syms:1;
3744
3745 /* Set if __tls_get_addr optimization should not be done. */
3746 unsigned int no_tls_get_addr_opt:1;
3747
3748 /* Support for multiple toc sections. */
3749 unsigned int do_multi_toc:1;
3750 unsigned int multi_toc_needed:1;
3751 unsigned int second_toc_pass:1;
3752 unsigned int do_toc_opt:1;
3753
3754 /* Set on error. */
3755 unsigned int stub_error:1;
3756
3757 /* Temp used by ppc64_elf_process_dot_syms. */
3758 unsigned int twiddled_syms:1;
3759
3760 /* Incremented every time we size stubs. */
3761 unsigned int stub_iteration;
3762
3763 /* Small local sym cache. */
3764 struct sym_cache sym_cache;
3765 };
3766
3767 /* Rename some of the generic section flags to better document how they
3768 are used here. */
3769
3770 /* Nonzero if this section has TLS related relocations. */
3771 #define has_tls_reloc sec_flg0
3772
3773 /* Nonzero if this section has a call to __tls_get_addr. */
3774 #define has_tls_get_addr_call sec_flg1
3775
3776 /* Nonzero if this section has any toc or got relocs. */
3777 #define has_toc_reloc sec_flg2
3778
3779 /* Nonzero if this section has a call to another section that uses
3780 the toc or got. */
3781 #define makes_toc_func_call sec_flg3
3782
3783 /* Recursion protection when determining above flag. */
3784 #define call_check_in_progress sec_flg4
3785 #define call_check_done sec_flg5
3786
3787 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3788
3789 #define ppc_hash_table(p) \
3790 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3791 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3792
3793 #define ppc_stub_hash_lookup(table, string, create, copy) \
3794 ((struct ppc_stub_hash_entry *) \
3795 bfd_hash_lookup ((table), (string), (create), (copy)))
3796
3797 #define ppc_branch_hash_lookup(table, string, create, copy) \
3798 ((struct ppc_branch_hash_entry *) \
3799 bfd_hash_lookup ((table), (string), (create), (copy)))
3800
3801 /* Create an entry in the stub hash table. */
3802
3803 static struct bfd_hash_entry *
3804 stub_hash_newfunc (struct bfd_hash_entry *entry,
3805 struct bfd_hash_table *table,
3806 const char *string)
3807 {
3808 /* Allocate the structure if it has not already been allocated by a
3809 subclass. */
3810 if (entry == NULL)
3811 {
3812 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3813 if (entry == NULL)
3814 return entry;
3815 }
3816
3817 /* Call the allocation method of the superclass. */
3818 entry = bfd_hash_newfunc (entry, table, string);
3819 if (entry != NULL)
3820 {
3821 struct ppc_stub_hash_entry *eh;
3822
3823 /* Initialize the local fields. */
3824 eh = (struct ppc_stub_hash_entry *) entry;
3825 eh->stub_type = ppc_stub_none;
3826 eh->stub_sec = NULL;
3827 eh->stub_offset = 0;
3828 eh->target_value = 0;
3829 eh->target_section = NULL;
3830 eh->h = NULL;
3831 eh->id_sec = NULL;
3832 }
3833
3834 return entry;
3835 }
3836
3837 /* Create an entry in the branch hash table. */
3838
3839 static struct bfd_hash_entry *
3840 branch_hash_newfunc (struct bfd_hash_entry *entry,
3841 struct bfd_hash_table *table,
3842 const char *string)
3843 {
3844 /* Allocate the structure if it has not already been allocated by a
3845 subclass. */
3846 if (entry == NULL)
3847 {
3848 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3849 if (entry == NULL)
3850 return entry;
3851 }
3852
3853 /* Call the allocation method of the superclass. */
3854 entry = bfd_hash_newfunc (entry, table, string);
3855 if (entry != NULL)
3856 {
3857 struct ppc_branch_hash_entry *eh;
3858
3859 /* Initialize the local fields. */
3860 eh = (struct ppc_branch_hash_entry *) entry;
3861 eh->offset = 0;
3862 eh->iter = 0;
3863 }
3864
3865 return entry;
3866 }
3867
3868 /* Create an entry in a ppc64 ELF linker hash table. */
3869
3870 static struct bfd_hash_entry *
3871 link_hash_newfunc (struct bfd_hash_entry *entry,
3872 struct bfd_hash_table *table,
3873 const char *string)
3874 {
3875 /* Allocate the structure if it has not already been allocated by a
3876 subclass. */
3877 if (entry == NULL)
3878 {
3879 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3880 if (entry == NULL)
3881 return entry;
3882 }
3883
3884 /* Call the allocation method of the superclass. */
3885 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3886 if (entry != NULL)
3887 {
3888 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3889
3890 memset (&eh->u.stub_cache, 0,
3891 (sizeof (struct ppc_link_hash_entry)
3892 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3893
3894 /* When making function calls, old ABI code references function entry
3895 points (dot symbols), while new ABI code references the function
3896 descriptor symbol. We need to make any combination of reference and
3897 definition work together, without breaking archive linking.
3898
3899 For a defined function "foo" and an undefined call to "bar":
3900 An old object defines "foo" and ".foo", references ".bar" (possibly
3901 "bar" too).
3902 A new object defines "foo" and references "bar".
3903
3904 A new object thus has no problem with its undefined symbols being
3905 satisfied by definitions in an old object. On the other hand, the
3906 old object won't have ".bar" satisfied by a new object.
3907
3908 Keep a list of newly added dot-symbols. */
3909
3910 if (string[0] == '.')
3911 {
3912 struct ppc_link_hash_table *htab;
3913
3914 htab = (struct ppc_link_hash_table *) table;
3915 eh->u.next_dot_sym = htab->dot_syms;
3916 htab->dot_syms = eh;
3917 }
3918 }
3919
3920 return entry;
3921 }
3922
3923 /* Create a ppc64 ELF linker hash table. */
3924
3925 static struct bfd_link_hash_table *
3926 ppc64_elf_link_hash_table_create (bfd *abfd)
3927 {
3928 struct ppc_link_hash_table *htab;
3929 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3930
3931 htab = bfd_zmalloc (amt);
3932 if (htab == NULL)
3933 return NULL;
3934
3935 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3936 sizeof (struct ppc_link_hash_entry),
3937 PPC64_ELF_DATA))
3938 {
3939 free (htab);
3940 return NULL;
3941 }
3942
3943 /* Init the stub hash table too. */
3944 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3945 sizeof (struct ppc_stub_hash_entry)))
3946 return NULL;
3947
3948 /* And the branch hash table. */
3949 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3950 sizeof (struct ppc_branch_hash_entry)))
3951 return NULL;
3952
3953 /* Initializing two fields of the union is just cosmetic. We really
3954 only care about glist, but when compiled on a 32-bit host the
3955 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3956 debugger inspection of these fields look nicer. */
3957 htab->elf.init_got_refcount.refcount = 0;
3958 htab->elf.init_got_refcount.glist = NULL;
3959 htab->elf.init_plt_refcount.refcount = 0;
3960 htab->elf.init_plt_refcount.glist = NULL;
3961 htab->elf.init_got_offset.offset = 0;
3962 htab->elf.init_got_offset.glist = NULL;
3963 htab->elf.init_plt_offset.offset = 0;
3964 htab->elf.init_plt_offset.glist = NULL;
3965
3966 return &htab->elf.root;
3967 }
3968
3969 /* Free the derived linker hash table. */
3970
3971 static void
3972 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3973 {
3974 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3975
3976 bfd_hash_table_free (&ret->stub_hash_table);
3977 bfd_hash_table_free (&ret->branch_hash_table);
3978 _bfd_generic_link_hash_table_free (hash);
3979 }
3980
3981 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3982
3983 void
3984 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3985 {
3986 struct ppc_link_hash_table *htab;
3987
3988 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3989
3990 /* Always hook our dynamic sections into the first bfd, which is the
3991 linker created stub bfd. This ensures that the GOT header is at
3992 the start of the output TOC section. */
3993 htab = ppc_hash_table (info);
3994 if (htab == NULL)
3995 return;
3996 htab->stub_bfd = abfd;
3997 htab->elf.dynobj = abfd;
3998 }
3999
4000 /* Build a name for an entry in the stub hash table. */
4001
4002 static char *
4003 ppc_stub_name (const asection *input_section,
4004 const asection *sym_sec,
4005 const struct ppc_link_hash_entry *h,
4006 const Elf_Internal_Rela *rel)
4007 {
4008 char *stub_name;
4009 bfd_size_type len;
4010
4011 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4012 offsets from a sym as a branch target? In fact, we could
4013 probably assume the addend is always zero. */
4014 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4015
4016 if (h)
4017 {
4018 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4019 stub_name = bfd_malloc (len);
4020 if (stub_name == NULL)
4021 return stub_name;
4022
4023 sprintf (stub_name, "%08x.%s+%x",
4024 input_section->id & 0xffffffff,
4025 h->elf.root.root.string,
4026 (int) rel->r_addend & 0xffffffff);
4027 }
4028 else
4029 {
4030 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4031 stub_name = bfd_malloc (len);
4032 if (stub_name == NULL)
4033 return stub_name;
4034
4035 sprintf (stub_name, "%08x.%x:%x+%x",
4036 input_section->id & 0xffffffff,
4037 sym_sec->id & 0xffffffff,
4038 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4039 (int) rel->r_addend & 0xffffffff);
4040 }
4041 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4042 stub_name[len - 2] = 0;
4043 return stub_name;
4044 }
4045
4046 /* Look up an entry in the stub hash. Stub entries are cached because
4047 creating the stub name takes a bit of time. */
4048
4049 static struct ppc_stub_hash_entry *
4050 ppc_get_stub_entry (const asection *input_section,
4051 const asection *sym_sec,
4052 struct ppc_link_hash_entry *h,
4053 const Elf_Internal_Rela *rel,
4054 struct ppc_link_hash_table *htab)
4055 {
4056 struct ppc_stub_hash_entry *stub_entry;
4057 const asection *id_sec;
4058
4059 /* If this input section is part of a group of sections sharing one
4060 stub section, then use the id of the first section in the group.
4061 Stub names need to include a section id, as there may well be
4062 more than one stub used to reach say, printf, and we need to
4063 distinguish between them. */
4064 id_sec = htab->stub_group[input_section->id].link_sec;
4065
4066 if (h != NULL && h->u.stub_cache != NULL
4067 && h->u.stub_cache->h == h
4068 && h->u.stub_cache->id_sec == id_sec)
4069 {
4070 stub_entry = h->u.stub_cache;
4071 }
4072 else
4073 {
4074 char *stub_name;
4075
4076 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4077 if (stub_name == NULL)
4078 return NULL;
4079
4080 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4081 stub_name, FALSE, FALSE);
4082 if (h != NULL)
4083 h->u.stub_cache = stub_entry;
4084
4085 free (stub_name);
4086 }
4087
4088 return stub_entry;
4089 }
4090
4091 /* Add a new stub entry to the stub hash. Not all fields of the new
4092 stub entry are initialised. */
4093
4094 static struct ppc_stub_hash_entry *
4095 ppc_add_stub (const char *stub_name,
4096 asection *section,
4097 struct bfd_link_info *info)
4098 {
4099 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4100 asection *link_sec;
4101 asection *stub_sec;
4102 struct ppc_stub_hash_entry *stub_entry;
4103
4104 link_sec = htab->stub_group[section->id].link_sec;
4105 stub_sec = htab->stub_group[section->id].stub_sec;
4106 if (stub_sec == NULL)
4107 {
4108 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4109 if (stub_sec == NULL)
4110 {
4111 size_t namelen;
4112 bfd_size_type len;
4113 char *s_name;
4114
4115 namelen = strlen (link_sec->name);
4116 len = namelen + sizeof (STUB_SUFFIX);
4117 s_name = bfd_alloc (htab->stub_bfd, len);
4118 if (s_name == NULL)
4119 return NULL;
4120
4121 memcpy (s_name, link_sec->name, namelen);
4122 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4123 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4124 if (stub_sec == NULL)
4125 return NULL;
4126 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4127 }
4128 htab->stub_group[section->id].stub_sec = stub_sec;
4129 }
4130
4131 /* Enter this entry into the linker stub hash table. */
4132 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4133 TRUE, FALSE);
4134 if (stub_entry == NULL)
4135 {
4136 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4137 section->owner, stub_name);
4138 return NULL;
4139 }
4140
4141 stub_entry->stub_sec = stub_sec;
4142 stub_entry->stub_offset = 0;
4143 stub_entry->id_sec = link_sec;
4144 return stub_entry;
4145 }
4146
4147 /* Create sections for linker generated code. */
4148
4149 static bfd_boolean
4150 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4151 {
4152 struct ppc_link_hash_table *htab;
4153 flagword flags;
4154
4155 htab = ppc_hash_table (info);
4156 if (htab == NULL)
4157 return FALSE;
4158
4159 /* Create .sfpr for code to save and restore fp regs. */
4160 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4161 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4162 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4163 flags);
4164 if (htab->sfpr == NULL
4165 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4166 return FALSE;
4167
4168 /* Create .glink for lazy dynamic linking support. */
4169 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4170 flags);
4171 if (htab->glink == NULL
4172 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4173 return FALSE;
4174
4175 if (!info->no_ld_generated_unwind_info)
4176 {
4177 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4178 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4179 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4180 ".eh_frame",
4181 flags);
4182 if (htab->glink_eh_frame == NULL
4183 || !bfd_set_section_alignment (abfd, htab->glink_eh_frame, 2))
4184 return FALSE;
4185 }
4186
4187 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4188 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4189 if (htab->iplt == NULL
4190 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4191 return FALSE;
4192
4193 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4194 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4195 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4196 ".rela.iplt",
4197 flags);
4198 if (htab->reliplt == NULL
4199 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4200 return FALSE;
4201
4202 /* Create branch lookup table for plt_branch stubs. */
4203 flags = (SEC_ALLOC | SEC_LOAD
4204 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4205 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4206 flags);
4207 if (htab->brlt == NULL
4208 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4209 return FALSE;
4210
4211 if (!info->shared)
4212 return TRUE;
4213
4214 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4215 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4216 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4217 ".rela.branch_lt",
4218 flags);
4219 if (htab->relbrlt == NULL
4220 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4221 return FALSE;
4222
4223 return TRUE;
4224 }
4225
4226 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4227 not already done. */
4228
4229 static bfd_boolean
4230 create_got_section (bfd *abfd, struct bfd_link_info *info)
4231 {
4232 asection *got, *relgot;
4233 flagword flags;
4234 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4235
4236 if (!is_ppc64_elf (abfd))
4237 return FALSE;
4238 if (htab == NULL)
4239 return FALSE;
4240
4241 if (!htab->got)
4242 {
4243 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4244 return FALSE;
4245
4246 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4247 if (!htab->got)
4248 abort ();
4249 }
4250
4251 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4252 | SEC_LINKER_CREATED);
4253
4254 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4255 if (!got
4256 || !bfd_set_section_alignment (abfd, got, 3))
4257 return FALSE;
4258
4259 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4260 flags | SEC_READONLY);
4261 if (!relgot
4262 || ! bfd_set_section_alignment (abfd, relgot, 3))
4263 return FALSE;
4264
4265 ppc64_elf_tdata (abfd)->got = got;
4266 ppc64_elf_tdata (abfd)->relgot = relgot;
4267 return TRUE;
4268 }
4269
4270 /* Create the dynamic sections, and set up shortcuts. */
4271
4272 static bfd_boolean
4273 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4274 {
4275 struct ppc_link_hash_table *htab;
4276
4277 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4278 return FALSE;
4279
4280 htab = ppc_hash_table (info);
4281 if (htab == NULL)
4282 return FALSE;
4283
4284 if (!htab->got)
4285 htab->got = bfd_get_section_by_name (dynobj, ".got");
4286 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4287 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4288 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4289 if (!info->shared)
4290 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4291
4292 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4293 || (!info->shared && !htab->relbss))
4294 abort ();
4295
4296 return TRUE;
4297 }
4298
4299 /* Follow indirect and warning symbol links. */
4300
4301 static inline struct bfd_link_hash_entry *
4302 follow_link (struct bfd_link_hash_entry *h)
4303 {
4304 while (h->type == bfd_link_hash_indirect
4305 || h->type == bfd_link_hash_warning)
4306 h = h->u.i.link;
4307 return h;
4308 }
4309
4310 static inline struct elf_link_hash_entry *
4311 elf_follow_link (struct elf_link_hash_entry *h)
4312 {
4313 return (struct elf_link_hash_entry *) follow_link (&h->root);
4314 }
4315
4316 static inline struct ppc_link_hash_entry *
4317 ppc_follow_link (struct ppc_link_hash_entry *h)
4318 {
4319 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4320 }
4321
4322 /* Merge PLT info on FROM with that on TO. */
4323
4324 static void
4325 move_plt_plist (struct ppc_link_hash_entry *from,
4326 struct ppc_link_hash_entry *to)
4327 {
4328 if (from->elf.plt.plist != NULL)
4329 {
4330 if (to->elf.plt.plist != NULL)
4331 {
4332 struct plt_entry **entp;
4333 struct plt_entry *ent;
4334
4335 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4336 {
4337 struct plt_entry *dent;
4338
4339 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4340 if (dent->addend == ent->addend)
4341 {
4342 dent->plt.refcount += ent->plt.refcount;
4343 *entp = ent->next;
4344 break;
4345 }
4346 if (dent == NULL)
4347 entp = &ent->next;
4348 }
4349 *entp = to->elf.plt.plist;
4350 }
4351
4352 to->elf.plt.plist = from->elf.plt.plist;
4353 from->elf.plt.plist = NULL;
4354 }
4355 }
4356
4357 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4358
4359 static void
4360 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4361 struct elf_link_hash_entry *dir,
4362 struct elf_link_hash_entry *ind)
4363 {
4364 struct ppc_link_hash_entry *edir, *eind;
4365
4366 edir = (struct ppc_link_hash_entry *) dir;
4367 eind = (struct ppc_link_hash_entry *) ind;
4368
4369 edir->is_func |= eind->is_func;
4370 edir->is_func_descriptor |= eind->is_func_descriptor;
4371 edir->tls_mask |= eind->tls_mask;
4372 if (eind->oh != NULL)
4373 edir->oh = ppc_follow_link (eind->oh);
4374
4375 /* If called to transfer flags for a weakdef during processing
4376 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4377 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4378 if (!(ELIMINATE_COPY_RELOCS
4379 && eind->elf.root.type != bfd_link_hash_indirect
4380 && edir->elf.dynamic_adjusted))
4381 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4382
4383 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4384 edir->elf.ref_regular |= eind->elf.ref_regular;
4385 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4386 edir->elf.needs_plt |= eind->elf.needs_plt;
4387
4388 /* If we were called to copy over info for a weak sym, that's all. */
4389 if (eind->elf.root.type != bfd_link_hash_indirect)
4390 return;
4391
4392 /* Copy over any dynamic relocs we may have on the indirect sym. */
4393 if (eind->dyn_relocs != NULL)
4394 {
4395 if (edir->dyn_relocs != NULL)
4396 {
4397 struct elf_dyn_relocs **pp;
4398 struct elf_dyn_relocs *p;
4399
4400 /* Add reloc counts against the indirect sym to the direct sym
4401 list. Merge any entries against the same section. */
4402 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4403 {
4404 struct elf_dyn_relocs *q;
4405
4406 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4407 if (q->sec == p->sec)
4408 {
4409 q->pc_count += p->pc_count;
4410 q->count += p->count;
4411 *pp = p->next;
4412 break;
4413 }
4414 if (q == NULL)
4415 pp = &p->next;
4416 }
4417 *pp = edir->dyn_relocs;
4418 }
4419
4420 edir->dyn_relocs = eind->dyn_relocs;
4421 eind->dyn_relocs = NULL;
4422 }
4423
4424 /* Copy over got entries that we may have already seen to the
4425 symbol which just became indirect. */
4426 if (eind->elf.got.glist != NULL)
4427 {
4428 if (edir->elf.got.glist != NULL)
4429 {
4430 struct got_entry **entp;
4431 struct got_entry *ent;
4432
4433 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4434 {
4435 struct got_entry *dent;
4436
4437 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4438 if (dent->addend == ent->addend
4439 && dent->owner == ent->owner
4440 && dent->tls_type == ent->tls_type)
4441 {
4442 dent->got.refcount += ent->got.refcount;
4443 *entp = ent->next;
4444 break;
4445 }
4446 if (dent == NULL)
4447 entp = &ent->next;
4448 }
4449 *entp = edir->elf.got.glist;
4450 }
4451
4452 edir->elf.got.glist = eind->elf.got.glist;
4453 eind->elf.got.glist = NULL;
4454 }
4455
4456 /* And plt entries. */
4457 move_plt_plist (eind, edir);
4458
4459 if (eind->elf.dynindx != -1)
4460 {
4461 if (edir->elf.dynindx != -1)
4462 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4463 edir->elf.dynstr_index);
4464 edir->elf.dynindx = eind->elf.dynindx;
4465 edir->elf.dynstr_index = eind->elf.dynstr_index;
4466 eind->elf.dynindx = -1;
4467 eind->elf.dynstr_index = 0;
4468 }
4469 }
4470
4471 /* Find the function descriptor hash entry from the given function code
4472 hash entry FH. Link the entries via their OH fields. */
4473
4474 static struct ppc_link_hash_entry *
4475 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4476 {
4477 struct ppc_link_hash_entry *fdh = fh->oh;
4478
4479 if (fdh == NULL)
4480 {
4481 const char *fd_name = fh->elf.root.root.string + 1;
4482
4483 fdh = (struct ppc_link_hash_entry *)
4484 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4485 if (fdh == NULL)
4486 return fdh;
4487
4488 fdh->is_func_descriptor = 1;
4489 fdh->oh = fh;
4490 fh->is_func = 1;
4491 fh->oh = fdh;
4492 }
4493
4494 return ppc_follow_link (fdh);
4495 }
4496
4497 /* Make a fake function descriptor sym for the code sym FH. */
4498
4499 static struct ppc_link_hash_entry *
4500 make_fdh (struct bfd_link_info *info,
4501 struct ppc_link_hash_entry *fh)
4502 {
4503 bfd *abfd;
4504 asymbol *newsym;
4505 struct bfd_link_hash_entry *bh;
4506 struct ppc_link_hash_entry *fdh;
4507
4508 abfd = fh->elf.root.u.undef.abfd;
4509 newsym = bfd_make_empty_symbol (abfd);
4510 newsym->name = fh->elf.root.root.string + 1;
4511 newsym->section = bfd_und_section_ptr;
4512 newsym->value = 0;
4513 newsym->flags = BSF_WEAK;
4514
4515 bh = NULL;
4516 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4517 newsym->flags, newsym->section,
4518 newsym->value, NULL, FALSE, FALSE,
4519 &bh))
4520 return NULL;
4521
4522 fdh = (struct ppc_link_hash_entry *) bh;
4523 fdh->elf.non_elf = 0;
4524 fdh->fake = 1;
4525 fdh->is_func_descriptor = 1;
4526 fdh->oh = fh;
4527 fh->is_func = 1;
4528 fh->oh = fdh;
4529 return fdh;
4530 }
4531
4532 /* Fix function descriptor symbols defined in .opd sections to be
4533 function type. */
4534
4535 static bfd_boolean
4536 ppc64_elf_add_symbol_hook (bfd *ibfd,
4537 struct bfd_link_info *info,
4538 Elf_Internal_Sym *isym,
4539 const char **name ATTRIBUTE_UNUSED,
4540 flagword *flags ATTRIBUTE_UNUSED,
4541 asection **sec,
4542 bfd_vma *value ATTRIBUTE_UNUSED)
4543 {
4544 if ((ibfd->flags & DYNAMIC) == 0
4545 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4546 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4547
4548 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4549 {
4550 if ((ibfd->flags & DYNAMIC) == 0)
4551 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4552 }
4553 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4554 ;
4555 else if (*sec != NULL
4556 && strcmp ((*sec)->name, ".opd") == 0)
4557 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4558
4559 return TRUE;
4560 }
4561
4562 /* This function makes an old ABI object reference to ".bar" cause the
4563 inclusion of a new ABI object archive that defines "bar".
4564 NAME is a symbol defined in an archive. Return a symbol in the hash
4565 table that might be satisfied by the archive symbols. */
4566
4567 static struct elf_link_hash_entry *
4568 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4569 struct bfd_link_info *info,
4570 const char *name)
4571 {
4572 struct elf_link_hash_entry *h;
4573 char *dot_name;
4574 size_t len;
4575
4576 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4577 if (h != NULL
4578 /* Don't return this sym if it is a fake function descriptor
4579 created by add_symbol_adjust. */
4580 && !(h->root.type == bfd_link_hash_undefweak
4581 && ((struct ppc_link_hash_entry *) h)->fake))
4582 return h;
4583
4584 if (name[0] == '.')
4585 return h;
4586
4587 len = strlen (name);
4588 dot_name = bfd_alloc (abfd, len + 2);
4589 if (dot_name == NULL)
4590 return (struct elf_link_hash_entry *) 0 - 1;
4591 dot_name[0] = '.';
4592 memcpy (dot_name + 1, name, len + 1);
4593 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4594 bfd_release (abfd, dot_name);
4595 return h;
4596 }
4597
4598 /* This function satisfies all old ABI object references to ".bar" if a
4599 new ABI object defines "bar". Well, at least, undefined dot symbols
4600 are made weak. This stops later archive searches from including an
4601 object if we already have a function descriptor definition. It also
4602 prevents the linker complaining about undefined symbols.
4603 We also check and correct mismatched symbol visibility here. The
4604 most restrictive visibility of the function descriptor and the
4605 function entry symbol is used. */
4606
4607 static bfd_boolean
4608 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4609 {
4610 struct ppc_link_hash_table *htab;
4611 struct ppc_link_hash_entry *fdh;
4612
4613 if (eh->elf.root.type == bfd_link_hash_indirect)
4614 return TRUE;
4615
4616 if (eh->elf.root.type == bfd_link_hash_warning)
4617 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4618
4619 if (eh->elf.root.root.string[0] != '.')
4620 abort ();
4621
4622 htab = ppc_hash_table (info);
4623 if (htab == NULL)
4624 return FALSE;
4625
4626 fdh = lookup_fdh (eh, htab);
4627 if (fdh == NULL)
4628 {
4629 if (!info->relocatable
4630 && (eh->elf.root.type == bfd_link_hash_undefined
4631 || eh->elf.root.type == bfd_link_hash_undefweak)
4632 && eh->elf.ref_regular)
4633 {
4634 /* Make an undefweak function descriptor sym, which is enough to
4635 pull in an --as-needed shared lib, but won't cause link
4636 errors. Archives are handled elsewhere. */
4637 fdh = make_fdh (info, eh);
4638 if (fdh == NULL)
4639 return FALSE;
4640 fdh->elf.ref_regular = 1;
4641 }
4642 }
4643 else
4644 {
4645 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4646 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4647 if (entry_vis < descr_vis)
4648 fdh->elf.other += entry_vis - descr_vis;
4649 else if (entry_vis > descr_vis)
4650 eh->elf.other += descr_vis - entry_vis;
4651
4652 if ((fdh->elf.root.type == bfd_link_hash_defined
4653 || fdh->elf.root.type == bfd_link_hash_defweak)
4654 && eh->elf.root.type == bfd_link_hash_undefined)
4655 {
4656 eh->elf.root.type = bfd_link_hash_undefweak;
4657 eh->was_undefined = 1;
4658 htab->twiddled_syms = 1;
4659 }
4660 }
4661
4662 return TRUE;
4663 }
4664
4665 /* Process list of dot-symbols we made in link_hash_newfunc. */
4666
4667 static bfd_boolean
4668 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4669 {
4670 struct ppc_link_hash_table *htab;
4671 struct ppc_link_hash_entry **p, *eh;
4672
4673 if (!is_ppc64_elf (info->output_bfd))
4674 return TRUE;
4675 htab = ppc_hash_table (info);
4676 if (htab == NULL)
4677 return FALSE;
4678
4679 if (is_ppc64_elf (ibfd))
4680 {
4681 p = &htab->dot_syms;
4682 while ((eh = *p) != NULL)
4683 {
4684 *p = NULL;
4685 if (!add_symbol_adjust (eh, info))
4686 return FALSE;
4687 p = &eh->u.next_dot_sym;
4688 }
4689 }
4690
4691 /* Clear the list for non-ppc64 input files. */
4692 p = &htab->dot_syms;
4693 while ((eh = *p) != NULL)
4694 {
4695 *p = NULL;
4696 p = &eh->u.next_dot_sym;
4697 }
4698
4699 /* We need to fix the undefs list for any syms we have twiddled to
4700 undef_weak. */
4701 if (htab->twiddled_syms)
4702 {
4703 bfd_link_repair_undef_list (&htab->elf.root);
4704 htab->twiddled_syms = 0;
4705 }
4706 return TRUE;
4707 }
4708
4709 /* Undo hash table changes when an --as-needed input file is determined
4710 not to be needed. */
4711
4712 static bfd_boolean
4713 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4714 struct bfd_link_info *info)
4715 {
4716 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4717
4718 if (htab == NULL)
4719 return FALSE;
4720
4721 htab->dot_syms = NULL;
4722 return TRUE;
4723 }
4724
4725 /* If --just-symbols against a final linked binary, then assume we need
4726 toc adjusting stubs when calling functions defined there. */
4727
4728 static void
4729 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4730 {
4731 if ((sec->flags & SEC_CODE) != 0
4732 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4733 && is_ppc64_elf (sec->owner))
4734 {
4735 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4736 if (got != NULL
4737 && got->size >= elf_backend_got_header_size
4738 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4739 sec->has_toc_reloc = 1;
4740 }
4741 _bfd_elf_link_just_syms (sec, info);
4742 }
4743
4744 static struct plt_entry **
4745 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4746 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4747 {
4748 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4749 struct plt_entry **local_plt;
4750 unsigned char *local_got_tls_masks;
4751
4752 if (local_got_ents == NULL)
4753 {
4754 bfd_size_type size = symtab_hdr->sh_info;
4755
4756 size *= (sizeof (*local_got_ents)
4757 + sizeof (*local_plt)
4758 + sizeof (*local_got_tls_masks));
4759 local_got_ents = bfd_zalloc (abfd, size);
4760 if (local_got_ents == NULL)
4761 return NULL;
4762 elf_local_got_ents (abfd) = local_got_ents;
4763 }
4764
4765 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4766 {
4767 struct got_entry *ent;
4768
4769 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4770 if (ent->addend == r_addend
4771 && ent->owner == abfd
4772 && ent->tls_type == tls_type)
4773 break;
4774 if (ent == NULL)
4775 {
4776 bfd_size_type amt = sizeof (*ent);
4777 ent = bfd_alloc (abfd, amt);
4778 if (ent == NULL)
4779 return FALSE;
4780 ent->next = local_got_ents[r_symndx];
4781 ent->addend = r_addend;
4782 ent->owner = abfd;
4783 ent->tls_type = tls_type;
4784 ent->is_indirect = FALSE;
4785 ent->got.refcount = 0;
4786 local_got_ents[r_symndx] = ent;
4787 }
4788 ent->got.refcount += 1;
4789 }
4790
4791 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4792 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4793 local_got_tls_masks[r_symndx] |= tls_type;
4794
4795 return local_plt + r_symndx;
4796 }
4797
4798 static bfd_boolean
4799 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4800 {
4801 struct plt_entry *ent;
4802
4803 for (ent = *plist; ent != NULL; ent = ent->next)
4804 if (ent->addend == addend)
4805 break;
4806 if (ent == NULL)
4807 {
4808 bfd_size_type amt = sizeof (*ent);
4809 ent = bfd_alloc (abfd, amt);
4810 if (ent == NULL)
4811 return FALSE;
4812 ent->next = *plist;
4813 ent->addend = addend;
4814 ent->plt.refcount = 0;
4815 *plist = ent;
4816 }
4817 ent->plt.refcount += 1;
4818 return TRUE;
4819 }
4820
4821 static bfd_boolean
4822 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4823 {
4824 return (r_type == R_PPC64_REL24
4825 || r_type == R_PPC64_REL14
4826 || r_type == R_PPC64_REL14_BRTAKEN
4827 || r_type == R_PPC64_REL14_BRNTAKEN
4828 || r_type == R_PPC64_ADDR24
4829 || r_type == R_PPC64_ADDR14
4830 || r_type == R_PPC64_ADDR14_BRTAKEN
4831 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4832 }
4833
4834 /* Look through the relocs for a section during the first phase, and
4835 calculate needed space in the global offset table, procedure
4836 linkage table, and dynamic reloc sections. */
4837
4838 static bfd_boolean
4839 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4840 asection *sec, const Elf_Internal_Rela *relocs)
4841 {
4842 struct ppc_link_hash_table *htab;
4843 Elf_Internal_Shdr *symtab_hdr;
4844 struct elf_link_hash_entry **sym_hashes;
4845 const Elf_Internal_Rela *rel;
4846 const Elf_Internal_Rela *rel_end;
4847 asection *sreloc;
4848 asection **opd_sym_map;
4849 struct elf_link_hash_entry *tga, *dottga;
4850
4851 if (info->relocatable)
4852 return TRUE;
4853
4854 /* Don't do anything special with non-loaded, non-alloced sections.
4855 In particular, any relocs in such sections should not affect GOT
4856 and PLT reference counting (ie. we don't allow them to create GOT
4857 or PLT entries), there's no possibility or desire to optimize TLS
4858 relocs, and there's not much point in propagating relocs to shared
4859 libs that the dynamic linker won't relocate. */
4860 if ((sec->flags & SEC_ALLOC) == 0)
4861 return TRUE;
4862
4863 BFD_ASSERT (is_ppc64_elf (abfd));
4864
4865 htab = ppc_hash_table (info);
4866 if (htab == NULL)
4867 return FALSE;
4868
4869 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4870 FALSE, FALSE, TRUE);
4871 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4872 FALSE, FALSE, TRUE);
4873 symtab_hdr = &elf_symtab_hdr (abfd);
4874 sym_hashes = elf_sym_hashes (abfd);
4875 sreloc = NULL;
4876 opd_sym_map = NULL;
4877 if (strcmp (sec->name, ".opd") == 0)
4878 {
4879 /* Garbage collection needs some extra help with .opd sections.
4880 We don't want to necessarily keep everything referenced by
4881 relocs in .opd, as that would keep all functions. Instead,
4882 if we reference an .opd symbol (a function descriptor), we
4883 want to keep the function code symbol's section. This is
4884 easy for global symbols, but for local syms we need to keep
4885 information about the associated function section. */
4886 bfd_size_type amt;
4887
4888 amt = sec->size * sizeof (*opd_sym_map) / 8;
4889 opd_sym_map = bfd_zalloc (abfd, amt);
4890 if (opd_sym_map == NULL)
4891 return FALSE;
4892 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4893 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4894 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4895 }
4896
4897 if (htab->sfpr == NULL
4898 && !create_linkage_sections (htab->elf.dynobj, info))
4899 return FALSE;
4900
4901 rel_end = relocs + sec->reloc_count;
4902 for (rel = relocs; rel < rel_end; rel++)
4903 {
4904 unsigned long r_symndx;
4905 struct elf_link_hash_entry *h;
4906 enum elf_ppc64_reloc_type r_type;
4907 int tls_type;
4908 struct _ppc64_elf_section_data *ppc64_sec;
4909 struct plt_entry **ifunc;
4910
4911 r_symndx = ELF64_R_SYM (rel->r_info);
4912 if (r_symndx < symtab_hdr->sh_info)
4913 h = NULL;
4914 else
4915 {
4916 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4917 h = elf_follow_link (h);
4918 }
4919
4920 tls_type = 0;
4921 ifunc = NULL;
4922 if (h != NULL)
4923 {
4924 if (h->type == STT_GNU_IFUNC)
4925 {
4926 h->needs_plt = 1;
4927 ifunc = &h->plt.plist;
4928 }
4929 }
4930 else
4931 {
4932 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4933 abfd, r_symndx);
4934 if (isym == NULL)
4935 return FALSE;
4936
4937 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4938 {
4939 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4940 rel->r_addend, PLT_IFUNC);
4941 if (ifunc == NULL)
4942 return FALSE;
4943 }
4944 }
4945 r_type = ELF64_R_TYPE (rel->r_info);
4946 if (is_branch_reloc (r_type))
4947 {
4948 if (h != NULL && (h == tga || h == dottga))
4949 {
4950 if (rel != relocs
4951 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4952 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4953 /* We have a new-style __tls_get_addr call with a marker
4954 reloc. */
4955 ;
4956 else
4957 /* Mark this section as having an old-style call. */
4958 sec->has_tls_get_addr_call = 1;
4959 }
4960
4961 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4962 if (ifunc != NULL
4963 && !update_plt_info (abfd, ifunc, rel->r_addend))
4964 return FALSE;
4965 }
4966
4967 switch (r_type)
4968 {
4969 case R_PPC64_TLSGD:
4970 case R_PPC64_TLSLD:
4971 /* These special tls relocs tie a call to __tls_get_addr with
4972 its parameter symbol. */
4973 break;
4974
4975 case R_PPC64_GOT_TLSLD16:
4976 case R_PPC64_GOT_TLSLD16_LO:
4977 case R_PPC64_GOT_TLSLD16_HI:
4978 case R_PPC64_GOT_TLSLD16_HA:
4979 tls_type = TLS_TLS | TLS_LD;
4980 goto dogottls;
4981
4982 case R_PPC64_GOT_TLSGD16:
4983 case R_PPC64_GOT_TLSGD16_LO:
4984 case R_PPC64_GOT_TLSGD16_HI:
4985 case R_PPC64_GOT_TLSGD16_HA:
4986 tls_type = TLS_TLS | TLS_GD;
4987 goto dogottls;
4988
4989 case R_PPC64_GOT_TPREL16_DS:
4990 case R_PPC64_GOT_TPREL16_LO_DS:
4991 case R_PPC64_GOT_TPREL16_HI:
4992 case R_PPC64_GOT_TPREL16_HA:
4993 if (!info->executable)
4994 info->flags |= DF_STATIC_TLS;
4995 tls_type = TLS_TLS | TLS_TPREL;
4996 goto dogottls;
4997
4998 case R_PPC64_GOT_DTPREL16_DS:
4999 case R_PPC64_GOT_DTPREL16_LO_DS:
5000 case R_PPC64_GOT_DTPREL16_HI:
5001 case R_PPC64_GOT_DTPREL16_HA:
5002 tls_type = TLS_TLS | TLS_DTPREL;
5003 dogottls:
5004 sec->has_tls_reloc = 1;
5005 /* Fall thru */
5006
5007 case R_PPC64_GOT16:
5008 case R_PPC64_GOT16_DS:
5009 case R_PPC64_GOT16_HA:
5010 case R_PPC64_GOT16_HI:
5011 case R_PPC64_GOT16_LO:
5012 case R_PPC64_GOT16_LO_DS:
5013 /* This symbol requires a global offset table entry. */
5014 sec->has_toc_reloc = 1;
5015 if (r_type == R_PPC64_GOT_TLSLD16
5016 || r_type == R_PPC64_GOT_TLSGD16
5017 || r_type == R_PPC64_GOT_TPREL16_DS
5018 || r_type == R_PPC64_GOT_DTPREL16_DS
5019 || r_type == R_PPC64_GOT16
5020 || r_type == R_PPC64_GOT16_DS)
5021 {
5022 htab->do_multi_toc = 1;
5023 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5024 }
5025
5026 if (ppc64_elf_tdata (abfd)->got == NULL
5027 && !create_got_section (abfd, info))
5028 return FALSE;
5029
5030 if (h != NULL)
5031 {
5032 struct ppc_link_hash_entry *eh;
5033 struct got_entry *ent;
5034
5035 eh = (struct ppc_link_hash_entry *) h;
5036 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5037 if (ent->addend == rel->r_addend
5038 && ent->owner == abfd
5039 && ent->tls_type == tls_type)
5040 break;
5041 if (ent == NULL)
5042 {
5043 bfd_size_type amt = sizeof (*ent);
5044 ent = bfd_alloc (abfd, amt);
5045 if (ent == NULL)
5046 return FALSE;
5047 ent->next = eh->elf.got.glist;
5048 ent->addend = rel->r_addend;
5049 ent->owner = abfd;
5050 ent->tls_type = tls_type;
5051 ent->is_indirect = FALSE;
5052 ent->got.refcount = 0;
5053 eh->elf.got.glist = ent;
5054 }
5055 ent->got.refcount += 1;
5056 eh->tls_mask |= tls_type;
5057 }
5058 else
5059 /* This is a global offset table entry for a local symbol. */
5060 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5061 rel->r_addend, tls_type))
5062 return FALSE;
5063 break;
5064
5065 case R_PPC64_PLT16_HA:
5066 case R_PPC64_PLT16_HI:
5067 case R_PPC64_PLT16_LO:
5068 case R_PPC64_PLT32:
5069 case R_PPC64_PLT64:
5070 /* This symbol requires a procedure linkage table entry. We
5071 actually build the entry in adjust_dynamic_symbol,
5072 because this might be a case of linking PIC code without
5073 linking in any dynamic objects, in which case we don't
5074 need to generate a procedure linkage table after all. */
5075 if (h == NULL)
5076 {
5077 /* It does not make sense to have a procedure linkage
5078 table entry for a local symbol. */
5079 bfd_set_error (bfd_error_bad_value);
5080 return FALSE;
5081 }
5082 else
5083 {
5084 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5085 return FALSE;
5086 h->needs_plt = 1;
5087 if (h->root.root.string[0] == '.'
5088 && h->root.root.string[1] != '\0')
5089 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5090 }
5091 break;
5092
5093 /* The following relocations don't need to propagate the
5094 relocation if linking a shared object since they are
5095 section relative. */
5096 case R_PPC64_SECTOFF:
5097 case R_PPC64_SECTOFF_LO:
5098 case R_PPC64_SECTOFF_HI:
5099 case R_PPC64_SECTOFF_HA:
5100 case R_PPC64_SECTOFF_DS:
5101 case R_PPC64_SECTOFF_LO_DS:
5102 case R_PPC64_DTPREL16:
5103 case R_PPC64_DTPREL16_LO:
5104 case R_PPC64_DTPREL16_HI:
5105 case R_PPC64_DTPREL16_HA:
5106 case R_PPC64_DTPREL16_DS:
5107 case R_PPC64_DTPREL16_LO_DS:
5108 case R_PPC64_DTPREL16_HIGHER:
5109 case R_PPC64_DTPREL16_HIGHERA:
5110 case R_PPC64_DTPREL16_HIGHEST:
5111 case R_PPC64_DTPREL16_HIGHESTA:
5112 break;
5113
5114 /* Nor do these. */
5115 case R_PPC64_REL16:
5116 case R_PPC64_REL16_LO:
5117 case R_PPC64_REL16_HI:
5118 case R_PPC64_REL16_HA:
5119 break;
5120
5121 case R_PPC64_TOC16:
5122 case R_PPC64_TOC16_DS:
5123 htab->do_multi_toc = 1;
5124 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5125 case R_PPC64_TOC16_LO:
5126 case R_PPC64_TOC16_HI:
5127 case R_PPC64_TOC16_HA:
5128 case R_PPC64_TOC16_LO_DS:
5129 sec->has_toc_reloc = 1;
5130 break;
5131
5132 /* This relocation describes the C++ object vtable hierarchy.
5133 Reconstruct it for later use during GC. */
5134 case R_PPC64_GNU_VTINHERIT:
5135 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5136 return FALSE;
5137 break;
5138
5139 /* This relocation describes which C++ vtable entries are actually
5140 used. Record for later use during GC. */
5141 case R_PPC64_GNU_VTENTRY:
5142 BFD_ASSERT (h != NULL);
5143 if (h != NULL
5144 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5145 return FALSE;
5146 break;
5147
5148 case R_PPC64_REL14:
5149 case R_PPC64_REL14_BRTAKEN:
5150 case R_PPC64_REL14_BRNTAKEN:
5151 {
5152 asection *dest = NULL;
5153
5154 /* Heuristic: If jumping outside our section, chances are
5155 we are going to need a stub. */
5156 if (h != NULL)
5157 {
5158 /* If the sym is weak it may be overridden later, so
5159 don't assume we know where a weak sym lives. */
5160 if (h->root.type == bfd_link_hash_defined)
5161 dest = h->root.u.def.section;
5162 }
5163 else
5164 {
5165 Elf_Internal_Sym *isym;
5166
5167 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5168 abfd, r_symndx);
5169 if (isym == NULL)
5170 return FALSE;
5171
5172 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5173 }
5174
5175 if (dest != sec)
5176 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5177 }
5178 /* Fall through. */
5179
5180 case R_PPC64_REL24:
5181 if (h != NULL && ifunc == NULL)
5182 {
5183 /* We may need a .plt entry if the function this reloc
5184 refers to is in a shared lib. */
5185 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5186 return FALSE;
5187 h->needs_plt = 1;
5188 if (h->root.root.string[0] == '.'
5189 && h->root.root.string[1] != '\0')
5190 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5191 if (h == tga || h == dottga)
5192 sec->has_tls_reloc = 1;
5193 }
5194 break;
5195
5196 case R_PPC64_TPREL64:
5197 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5198 if (!info->executable)
5199 info->flags |= DF_STATIC_TLS;
5200 goto dotlstoc;
5201
5202 case R_PPC64_DTPMOD64:
5203 if (rel + 1 < rel_end
5204 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5205 && rel[1].r_offset == rel->r_offset + 8)
5206 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5207 else
5208 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5209 goto dotlstoc;
5210
5211 case R_PPC64_DTPREL64:
5212 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5213 if (rel != relocs
5214 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5215 && rel[-1].r_offset == rel->r_offset - 8)
5216 /* This is the second reloc of a dtpmod, dtprel pair.
5217 Don't mark with TLS_DTPREL. */
5218 goto dodyn;
5219
5220 dotlstoc:
5221 sec->has_tls_reloc = 1;
5222 if (h != NULL)
5223 {
5224 struct ppc_link_hash_entry *eh;
5225 eh = (struct ppc_link_hash_entry *) h;
5226 eh->tls_mask |= tls_type;
5227 }
5228 else
5229 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5230 rel->r_addend, tls_type))
5231 return FALSE;
5232
5233 ppc64_sec = ppc64_elf_section_data (sec);
5234 if (ppc64_sec->sec_type != sec_toc)
5235 {
5236 bfd_size_type amt;
5237
5238 /* One extra to simplify get_tls_mask. */
5239 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5240 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5241 if (ppc64_sec->u.toc.symndx == NULL)
5242 return FALSE;
5243 amt = sec->size * sizeof (bfd_vma) / 8;
5244 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5245 if (ppc64_sec->u.toc.add == NULL)
5246 return FALSE;
5247 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5248 ppc64_sec->sec_type = sec_toc;
5249 }
5250 BFD_ASSERT (rel->r_offset % 8 == 0);
5251 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5252 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5253
5254 /* Mark the second slot of a GD or LD entry.
5255 -1 to indicate GD and -2 to indicate LD. */
5256 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5257 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5258 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5259 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5260 goto dodyn;
5261
5262 case R_PPC64_TPREL16:
5263 case R_PPC64_TPREL16_LO:
5264 case R_PPC64_TPREL16_HI:
5265 case R_PPC64_TPREL16_HA:
5266 case R_PPC64_TPREL16_DS:
5267 case R_PPC64_TPREL16_LO_DS:
5268 case R_PPC64_TPREL16_HIGHER:
5269 case R_PPC64_TPREL16_HIGHERA:
5270 case R_PPC64_TPREL16_HIGHEST:
5271 case R_PPC64_TPREL16_HIGHESTA:
5272 if (info->shared)
5273 {
5274 if (!info->executable)
5275 info->flags |= DF_STATIC_TLS;
5276 goto dodyn;
5277 }
5278 break;
5279
5280 case R_PPC64_ADDR64:
5281 if (opd_sym_map != NULL
5282 && rel + 1 < rel_end
5283 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5284 {
5285 if (h != NULL)
5286 {
5287 if (h->root.root.string[0] == '.'
5288 && h->root.root.string[1] != 0
5289 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5290 ;
5291 else
5292 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5293 }
5294 else
5295 {
5296 asection *s;
5297 Elf_Internal_Sym *isym;
5298
5299 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5300 abfd, r_symndx);
5301 if (isym == NULL)
5302 return FALSE;
5303
5304 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5305 if (s != NULL && s != sec)
5306 opd_sym_map[rel->r_offset / 8] = s;
5307 }
5308 }
5309 /* Fall through. */
5310
5311 case R_PPC64_REL30:
5312 case R_PPC64_REL32:
5313 case R_PPC64_REL64:
5314 case R_PPC64_ADDR14:
5315 case R_PPC64_ADDR14_BRNTAKEN:
5316 case R_PPC64_ADDR14_BRTAKEN:
5317 case R_PPC64_ADDR16:
5318 case R_PPC64_ADDR16_DS:
5319 case R_PPC64_ADDR16_HA:
5320 case R_PPC64_ADDR16_HI:
5321 case R_PPC64_ADDR16_HIGHER:
5322 case R_PPC64_ADDR16_HIGHERA:
5323 case R_PPC64_ADDR16_HIGHEST:
5324 case R_PPC64_ADDR16_HIGHESTA:
5325 case R_PPC64_ADDR16_LO:
5326 case R_PPC64_ADDR16_LO_DS:
5327 case R_PPC64_ADDR24:
5328 case R_PPC64_ADDR32:
5329 case R_PPC64_UADDR16:
5330 case R_PPC64_UADDR32:
5331 case R_PPC64_UADDR64:
5332 case R_PPC64_TOC:
5333 if (h != NULL && !info->shared)
5334 /* We may need a copy reloc. */
5335 h->non_got_ref = 1;
5336
5337 /* Don't propagate .opd relocs. */
5338 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5339 break;
5340
5341 /* If we are creating a shared library, and this is a reloc
5342 against a global symbol, or a non PC relative reloc
5343 against a local symbol, then we need to copy the reloc
5344 into the shared library. However, if we are linking with
5345 -Bsymbolic, we do not need to copy a reloc against a
5346 global symbol which is defined in an object we are
5347 including in the link (i.e., DEF_REGULAR is set). At
5348 this point we have not seen all the input files, so it is
5349 possible that DEF_REGULAR is not set now but will be set
5350 later (it is never cleared). In case of a weak definition,
5351 DEF_REGULAR may be cleared later by a strong definition in
5352 a shared library. We account for that possibility below by
5353 storing information in the dyn_relocs field of the hash
5354 table entry. A similar situation occurs when creating
5355 shared libraries and symbol visibility changes render the
5356 symbol local.
5357
5358 If on the other hand, we are creating an executable, we
5359 may need to keep relocations for symbols satisfied by a
5360 dynamic library if we manage to avoid copy relocs for the
5361 symbol. */
5362 dodyn:
5363 if ((info->shared
5364 && (must_be_dyn_reloc (info, r_type)
5365 || (h != NULL
5366 && (! info->symbolic
5367 || h->root.type == bfd_link_hash_defweak
5368 || !h->def_regular))))
5369 || (ELIMINATE_COPY_RELOCS
5370 && !info->shared
5371 && h != NULL
5372 && (h->root.type == bfd_link_hash_defweak
5373 || !h->def_regular))
5374 || (!info->shared
5375 && ifunc != NULL))
5376 {
5377 struct elf_dyn_relocs *p;
5378 struct elf_dyn_relocs **head;
5379
5380 /* We must copy these reloc types into the output file.
5381 Create a reloc section in dynobj and make room for
5382 this reloc. */
5383 if (sreloc == NULL)
5384 {
5385 sreloc = _bfd_elf_make_dynamic_reloc_section
5386 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5387
5388 if (sreloc == NULL)
5389 return FALSE;
5390 }
5391
5392 /* If this is a global symbol, we count the number of
5393 relocations we need for this symbol. */
5394 if (h != NULL)
5395 {
5396 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5397 }
5398 else
5399 {
5400 /* Track dynamic relocs needed for local syms too.
5401 We really need local syms available to do this
5402 easily. Oh well. */
5403 asection *s;
5404 void *vpp;
5405 Elf_Internal_Sym *isym;
5406
5407 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5408 abfd, r_symndx);
5409 if (isym == NULL)
5410 return FALSE;
5411
5412 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5413 if (s == NULL)
5414 s = sec;
5415
5416 vpp = &elf_section_data (s)->local_dynrel;
5417 head = (struct elf_dyn_relocs **) vpp;
5418 }
5419
5420 p = *head;
5421 if (p == NULL || p->sec != sec)
5422 {
5423 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5424 if (p == NULL)
5425 return FALSE;
5426 p->next = *head;
5427 *head = p;
5428 p->sec = sec;
5429 p->count = 0;
5430 p->pc_count = 0;
5431 }
5432
5433 p->count += 1;
5434 if (!must_be_dyn_reloc (info, r_type))
5435 p->pc_count += 1;
5436 }
5437 break;
5438
5439 default:
5440 break;
5441 }
5442 }
5443
5444 return TRUE;
5445 }
5446
5447 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5448 of the code entry point, and its section. */
5449
5450 static bfd_vma
5451 opd_entry_value (asection *opd_sec,
5452 bfd_vma offset,
5453 asection **code_sec,
5454 bfd_vma *code_off)
5455 {
5456 bfd *opd_bfd = opd_sec->owner;
5457 Elf_Internal_Rela *relocs;
5458 Elf_Internal_Rela *lo, *hi, *look;
5459 bfd_vma val;
5460
5461 /* No relocs implies we are linking a --just-symbols object. */
5462 if (opd_sec->reloc_count == 0)
5463 {
5464 char buf[8];
5465
5466 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5467 return (bfd_vma) -1;
5468
5469 val = bfd_get_64 (opd_bfd, buf);
5470 if (code_sec != NULL)
5471 {
5472 asection *sec, *likely = NULL;
5473 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5474 if (sec->vma <= val
5475 && (sec->flags & SEC_LOAD) != 0
5476 && (sec->flags & SEC_ALLOC) != 0)
5477 likely = sec;
5478 if (likely != NULL)
5479 {
5480 *code_sec = likely;
5481 if (code_off != NULL)
5482 *code_off = val - likely->vma;
5483 }
5484 }
5485 return val;
5486 }
5487
5488 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5489
5490 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5491 if (relocs == NULL)
5492 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5493
5494 /* Go find the opd reloc at the sym address. */
5495 lo = relocs;
5496 BFD_ASSERT (lo != NULL);
5497 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5498 val = (bfd_vma) -1;
5499 while (lo < hi)
5500 {
5501 look = lo + (hi - lo) / 2;
5502 if (look->r_offset < offset)
5503 lo = look + 1;
5504 else if (look->r_offset > offset)
5505 hi = look;
5506 else
5507 {
5508 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5509
5510 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5511 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5512 {
5513 unsigned long symndx = ELF64_R_SYM (look->r_info);
5514 asection *sec;
5515
5516 if (symndx < symtab_hdr->sh_info)
5517 {
5518 Elf_Internal_Sym *sym;
5519
5520 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5521 if (sym == NULL)
5522 {
5523 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5524 symtab_hdr->sh_info,
5525 0, NULL, NULL, NULL);
5526 if (sym == NULL)
5527 break;
5528 symtab_hdr->contents = (bfd_byte *) sym;
5529 }
5530
5531 sym += symndx;
5532 val = sym->st_value;
5533 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5534 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5535 }
5536 else
5537 {
5538 struct elf_link_hash_entry **sym_hashes;
5539 struct elf_link_hash_entry *rh;
5540
5541 sym_hashes = elf_sym_hashes (opd_bfd);
5542 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5543 rh = elf_follow_link (rh);
5544 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5545 || rh->root.type == bfd_link_hash_defweak);
5546 val = rh->root.u.def.value;
5547 sec = rh->root.u.def.section;
5548 }
5549 val += look->r_addend;
5550 if (code_off != NULL)
5551 *code_off = val;
5552 if (code_sec != NULL)
5553 *code_sec = sec;
5554 if (sec != NULL && sec->output_section != NULL)
5555 val += sec->output_section->vma + sec->output_offset;
5556 }
5557 break;
5558 }
5559 }
5560
5561 return val;
5562 }
5563
5564 /* Return true if symbol is defined in a regular object file. */
5565
5566 static bfd_boolean
5567 is_static_defined (struct elf_link_hash_entry *h)
5568 {
5569 return ((h->root.type == bfd_link_hash_defined
5570 || h->root.type == bfd_link_hash_defweak)
5571 && h->root.u.def.section != NULL
5572 && h->root.u.def.section->output_section != NULL);
5573 }
5574
5575 /* If FDH is a function descriptor symbol, return the associated code
5576 entry symbol if it is defined. Return NULL otherwise. */
5577
5578 static struct ppc_link_hash_entry *
5579 defined_code_entry (struct ppc_link_hash_entry *fdh)
5580 {
5581 if (fdh->is_func_descriptor)
5582 {
5583 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5584 if (fh->elf.root.type == bfd_link_hash_defined
5585 || fh->elf.root.type == bfd_link_hash_defweak)
5586 return fh;
5587 }
5588 return NULL;
5589 }
5590
5591 /* If FH is a function code entry symbol, return the associated
5592 function descriptor symbol if it is defined. Return NULL otherwise. */
5593
5594 static struct ppc_link_hash_entry *
5595 defined_func_desc (struct ppc_link_hash_entry *fh)
5596 {
5597 if (fh->oh != NULL
5598 && fh->oh->is_func_descriptor)
5599 {
5600 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5601 if (fdh->elf.root.type == bfd_link_hash_defined
5602 || fdh->elf.root.type == bfd_link_hash_defweak)
5603 return fdh;
5604 }
5605 return NULL;
5606 }
5607
5608 /* Mark all our entry sym sections, both opd and code section. */
5609
5610 static void
5611 ppc64_elf_gc_keep (struct bfd_link_info *info)
5612 {
5613 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5614 struct bfd_sym_chain *sym;
5615
5616 if (htab == NULL)
5617 return;
5618
5619 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5620 {
5621 struct ppc_link_hash_entry *eh, *fh;
5622 asection *sec;
5623
5624 eh = (struct ppc_link_hash_entry *)
5625 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5626 if (eh == NULL)
5627 continue;
5628 if (eh->elf.root.type != bfd_link_hash_defined
5629 && eh->elf.root.type != bfd_link_hash_defweak)
5630 continue;
5631
5632 fh = defined_code_entry (eh);
5633 if (fh != NULL)
5634 {
5635 sec = fh->elf.root.u.def.section;
5636 sec->flags |= SEC_KEEP;
5637 }
5638 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5639 && opd_entry_value (eh->elf.root.u.def.section,
5640 eh->elf.root.u.def.value,
5641 &sec, NULL) != (bfd_vma) -1)
5642 sec->flags |= SEC_KEEP;
5643
5644 sec = eh->elf.root.u.def.section;
5645 sec->flags |= SEC_KEEP;
5646 }
5647 }
5648
5649 /* Mark sections containing dynamically referenced symbols. When
5650 building shared libraries, we must assume that any visible symbol is
5651 referenced. */
5652
5653 static bfd_boolean
5654 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5655 {
5656 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5657 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5658 struct ppc_link_hash_entry *fdh;
5659
5660 /* Dynamic linking info is on the func descriptor sym. */
5661 fdh = defined_func_desc (eh);
5662 if (fdh != NULL)
5663 eh = fdh;
5664
5665 if ((eh->elf.root.type == bfd_link_hash_defined
5666 || eh->elf.root.type == bfd_link_hash_defweak)
5667 && (eh->elf.ref_dynamic
5668 || (!info->executable
5669 && eh->elf.def_regular
5670 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5671 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5672 {
5673 asection *code_sec;
5674 struct ppc_link_hash_entry *fh;
5675
5676 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5677
5678 /* Function descriptor syms cause the associated
5679 function code sym section to be marked. */
5680 fh = defined_code_entry (eh);
5681 if (fh != NULL)
5682 {
5683 code_sec = fh->elf.root.u.def.section;
5684 code_sec->flags |= SEC_KEEP;
5685 }
5686 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5687 && opd_entry_value (eh->elf.root.u.def.section,
5688 eh->elf.root.u.def.value,
5689 &code_sec, NULL) != (bfd_vma) -1)
5690 code_sec->flags |= SEC_KEEP;
5691 }
5692
5693 return TRUE;
5694 }
5695
5696 /* Return the section that should be marked against GC for a given
5697 relocation. */
5698
5699 static asection *
5700 ppc64_elf_gc_mark_hook (asection *sec,
5701 struct bfd_link_info *info,
5702 Elf_Internal_Rela *rel,
5703 struct elf_link_hash_entry *h,
5704 Elf_Internal_Sym *sym)
5705 {
5706 asection *rsec;
5707
5708 /* Syms return NULL if we're marking .opd, so we avoid marking all
5709 function sections, as all functions are referenced in .opd. */
5710 rsec = NULL;
5711 if (get_opd_info (sec) != NULL)
5712 return rsec;
5713
5714 if (h != NULL)
5715 {
5716 enum elf_ppc64_reloc_type r_type;
5717 struct ppc_link_hash_entry *eh, *fh, *fdh;
5718
5719 r_type = ELF64_R_TYPE (rel->r_info);
5720 switch (r_type)
5721 {
5722 case R_PPC64_GNU_VTINHERIT:
5723 case R_PPC64_GNU_VTENTRY:
5724 break;
5725
5726 default:
5727 switch (h->root.type)
5728 {
5729 case bfd_link_hash_defined:
5730 case bfd_link_hash_defweak:
5731 eh = (struct ppc_link_hash_entry *) h;
5732 fdh = defined_func_desc (eh);
5733 if (fdh != NULL)
5734 eh = fdh;
5735
5736 /* Function descriptor syms cause the associated
5737 function code sym section to be marked. */
5738 fh = defined_code_entry (eh);
5739 if (fh != NULL)
5740 {
5741 /* They also mark their opd section. */
5742 eh->elf.root.u.def.section->gc_mark = 1;
5743
5744 rsec = fh->elf.root.u.def.section;
5745 }
5746 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5747 && opd_entry_value (eh->elf.root.u.def.section,
5748 eh->elf.root.u.def.value,
5749 &rsec, NULL) != (bfd_vma) -1)
5750 eh->elf.root.u.def.section->gc_mark = 1;
5751 else
5752 rsec = h->root.u.def.section;
5753 break;
5754
5755 case bfd_link_hash_common:
5756 rsec = h->root.u.c.p->section;
5757 break;
5758
5759 default:
5760 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5761 }
5762 }
5763 }
5764 else
5765 {
5766 struct _opd_sec_data *opd;
5767
5768 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5769 opd = get_opd_info (rsec);
5770 if (opd != NULL && opd->func_sec != NULL)
5771 {
5772 rsec->gc_mark = 1;
5773
5774 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5775 }
5776 }
5777
5778 return rsec;
5779 }
5780
5781 /* Update the .got, .plt. and dynamic reloc reference counts for the
5782 section being removed. */
5783
5784 static bfd_boolean
5785 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5786 asection *sec, const Elf_Internal_Rela *relocs)
5787 {
5788 struct ppc_link_hash_table *htab;
5789 Elf_Internal_Shdr *symtab_hdr;
5790 struct elf_link_hash_entry **sym_hashes;
5791 struct got_entry **local_got_ents;
5792 const Elf_Internal_Rela *rel, *relend;
5793
5794 if (info->relocatable)
5795 return TRUE;
5796
5797 if ((sec->flags & SEC_ALLOC) == 0)
5798 return TRUE;
5799
5800 elf_section_data (sec)->local_dynrel = NULL;
5801
5802 htab = ppc_hash_table (info);
5803 if (htab == NULL)
5804 return FALSE;
5805
5806 symtab_hdr = &elf_symtab_hdr (abfd);
5807 sym_hashes = elf_sym_hashes (abfd);
5808 local_got_ents = elf_local_got_ents (abfd);
5809
5810 relend = relocs + sec->reloc_count;
5811 for (rel = relocs; rel < relend; rel++)
5812 {
5813 unsigned long r_symndx;
5814 enum elf_ppc64_reloc_type r_type;
5815 struct elf_link_hash_entry *h = NULL;
5816 unsigned char tls_type = 0;
5817
5818 r_symndx = ELF64_R_SYM (rel->r_info);
5819 r_type = ELF64_R_TYPE (rel->r_info);
5820 if (r_symndx >= symtab_hdr->sh_info)
5821 {
5822 struct ppc_link_hash_entry *eh;
5823 struct elf_dyn_relocs **pp;
5824 struct elf_dyn_relocs *p;
5825
5826 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5827 h = elf_follow_link (h);
5828 eh = (struct ppc_link_hash_entry *) h;
5829
5830 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5831 if (p->sec == sec)
5832 {
5833 /* Everything must go for SEC. */
5834 *pp = p->next;
5835 break;
5836 }
5837 }
5838
5839 if (is_branch_reloc (r_type))
5840 {
5841 struct plt_entry **ifunc = NULL;
5842 if (h != NULL)
5843 {
5844 if (h->type == STT_GNU_IFUNC)
5845 ifunc = &h->plt.plist;
5846 }
5847 else if (local_got_ents != NULL)
5848 {
5849 struct plt_entry **local_plt = (struct plt_entry **)
5850 (local_got_ents + symtab_hdr->sh_info);
5851 unsigned char *local_got_tls_masks = (unsigned char *)
5852 (local_plt + symtab_hdr->sh_info);
5853 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5854 ifunc = local_plt + r_symndx;
5855 }
5856 if (ifunc != NULL)
5857 {
5858 struct plt_entry *ent;
5859
5860 for (ent = *ifunc; ent != NULL; ent = ent->next)
5861 if (ent->addend == rel->r_addend)
5862 break;
5863 if (ent == NULL)
5864 abort ();
5865 if (ent->plt.refcount > 0)
5866 ent->plt.refcount -= 1;
5867 continue;
5868 }
5869 }
5870
5871 switch (r_type)
5872 {
5873 case R_PPC64_GOT_TLSLD16:
5874 case R_PPC64_GOT_TLSLD16_LO:
5875 case R_PPC64_GOT_TLSLD16_HI:
5876 case R_PPC64_GOT_TLSLD16_HA:
5877 tls_type = TLS_TLS | TLS_LD;
5878 goto dogot;
5879
5880 case R_PPC64_GOT_TLSGD16:
5881 case R_PPC64_GOT_TLSGD16_LO:
5882 case R_PPC64_GOT_TLSGD16_HI:
5883 case R_PPC64_GOT_TLSGD16_HA:
5884 tls_type = TLS_TLS | TLS_GD;
5885 goto dogot;
5886
5887 case R_PPC64_GOT_TPREL16_DS:
5888 case R_PPC64_GOT_TPREL16_LO_DS:
5889 case R_PPC64_GOT_TPREL16_HI:
5890 case R_PPC64_GOT_TPREL16_HA:
5891 tls_type = TLS_TLS | TLS_TPREL;
5892 goto dogot;
5893
5894 case R_PPC64_GOT_DTPREL16_DS:
5895 case R_PPC64_GOT_DTPREL16_LO_DS:
5896 case R_PPC64_GOT_DTPREL16_HI:
5897 case R_PPC64_GOT_DTPREL16_HA:
5898 tls_type = TLS_TLS | TLS_DTPREL;
5899 goto dogot;
5900
5901 case R_PPC64_GOT16:
5902 case R_PPC64_GOT16_DS:
5903 case R_PPC64_GOT16_HA:
5904 case R_PPC64_GOT16_HI:
5905 case R_PPC64_GOT16_LO:
5906 case R_PPC64_GOT16_LO_DS:
5907 dogot:
5908 {
5909 struct got_entry *ent;
5910
5911 if (h != NULL)
5912 ent = h->got.glist;
5913 else
5914 ent = local_got_ents[r_symndx];
5915
5916 for (; ent != NULL; ent = ent->next)
5917 if (ent->addend == rel->r_addend
5918 && ent->owner == abfd
5919 && ent->tls_type == tls_type)
5920 break;
5921 if (ent == NULL)
5922 abort ();
5923 if (ent->got.refcount > 0)
5924 ent->got.refcount -= 1;
5925 }
5926 break;
5927
5928 case R_PPC64_PLT16_HA:
5929 case R_PPC64_PLT16_HI:
5930 case R_PPC64_PLT16_LO:
5931 case R_PPC64_PLT32:
5932 case R_PPC64_PLT64:
5933 case R_PPC64_REL14:
5934 case R_PPC64_REL14_BRNTAKEN:
5935 case R_PPC64_REL14_BRTAKEN:
5936 case R_PPC64_REL24:
5937 if (h != NULL)
5938 {
5939 struct plt_entry *ent;
5940
5941 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5942 if (ent->addend == rel->r_addend)
5943 break;
5944 if (ent != NULL && ent->plt.refcount > 0)
5945 ent->plt.refcount -= 1;
5946 }
5947 break;
5948
5949 default:
5950 break;
5951 }
5952 }
5953 return TRUE;
5954 }
5955
5956 /* The maximum size of .sfpr. */
5957 #define SFPR_MAX (218*4)
5958
5959 struct sfpr_def_parms
5960 {
5961 const char name[12];
5962 unsigned char lo, hi;
5963 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5964 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5965 };
5966
5967 /* Auto-generate _save*, _rest* functions in .sfpr. */
5968
5969 static bfd_boolean
5970 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5971 {
5972 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5973 unsigned int i;
5974 size_t len = strlen (parm->name);
5975 bfd_boolean writing = FALSE;
5976 char sym[16];
5977
5978 if (htab == NULL)
5979 return FALSE;
5980
5981 memcpy (sym, parm->name, len);
5982 sym[len + 2] = 0;
5983
5984 for (i = parm->lo; i <= parm->hi; i++)
5985 {
5986 struct elf_link_hash_entry *h;
5987
5988 sym[len + 0] = i / 10 + '0';
5989 sym[len + 1] = i % 10 + '0';
5990 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5991 if (h != NULL
5992 && !h->def_regular)
5993 {
5994 h->root.type = bfd_link_hash_defined;
5995 h->root.u.def.section = htab->sfpr;
5996 h->root.u.def.value = htab->sfpr->size;
5997 h->type = STT_FUNC;
5998 h->def_regular = 1;
5999 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6000 writing = TRUE;
6001 if (htab->sfpr->contents == NULL)
6002 {
6003 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6004 if (htab->sfpr->contents == NULL)
6005 return FALSE;
6006 }
6007 }
6008 if (writing)
6009 {
6010 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6011 if (i != parm->hi)
6012 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6013 else
6014 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6015 htab->sfpr->size = p - htab->sfpr->contents;
6016 }
6017 }
6018
6019 return TRUE;
6020 }
6021
6022 static bfd_byte *
6023 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6024 {
6025 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6026 return p + 4;
6027 }
6028
6029 static bfd_byte *
6030 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6031 {
6032 p = savegpr0 (abfd, p, r);
6033 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6034 p = p + 4;
6035 bfd_put_32 (abfd, BLR, p);
6036 return p + 4;
6037 }
6038
6039 static bfd_byte *
6040 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6041 {
6042 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6043 return p + 4;
6044 }
6045
6046 static bfd_byte *
6047 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6048 {
6049 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6050 p = p + 4;
6051 p = restgpr0 (abfd, p, r);
6052 bfd_put_32 (abfd, MTLR_R0, p);
6053 p = p + 4;
6054 if (r == 29)
6055 {
6056 p = restgpr0 (abfd, p, 30);
6057 p = restgpr0 (abfd, p, 31);
6058 }
6059 bfd_put_32 (abfd, BLR, p);
6060 return p + 4;
6061 }
6062
6063 static bfd_byte *
6064 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6065 {
6066 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6067 return p + 4;
6068 }
6069
6070 static bfd_byte *
6071 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6072 {
6073 p = savegpr1 (abfd, p, r);
6074 bfd_put_32 (abfd, BLR, p);
6075 return p + 4;
6076 }
6077
6078 static bfd_byte *
6079 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6080 {
6081 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6082 return p + 4;
6083 }
6084
6085 static bfd_byte *
6086 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6087 {
6088 p = restgpr1 (abfd, p, r);
6089 bfd_put_32 (abfd, BLR, p);
6090 return p + 4;
6091 }
6092
6093 static bfd_byte *
6094 savefpr (bfd *abfd, bfd_byte *p, int r)
6095 {
6096 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6097 return p + 4;
6098 }
6099
6100 static bfd_byte *
6101 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6102 {
6103 p = savefpr (abfd, p, r);
6104 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6105 p = p + 4;
6106 bfd_put_32 (abfd, BLR, p);
6107 return p + 4;
6108 }
6109
6110 static bfd_byte *
6111 restfpr (bfd *abfd, bfd_byte *p, int r)
6112 {
6113 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6114 return p + 4;
6115 }
6116
6117 static bfd_byte *
6118 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6119 {
6120 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6121 p = p + 4;
6122 p = restfpr (abfd, p, r);
6123 bfd_put_32 (abfd, MTLR_R0, p);
6124 p = p + 4;
6125 if (r == 29)
6126 {
6127 p = restfpr (abfd, p, 30);
6128 p = restfpr (abfd, p, 31);
6129 }
6130 bfd_put_32 (abfd, BLR, p);
6131 return p + 4;
6132 }
6133
6134 static bfd_byte *
6135 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6136 {
6137 p = savefpr (abfd, p, r);
6138 bfd_put_32 (abfd, BLR, p);
6139 return p + 4;
6140 }
6141
6142 static bfd_byte *
6143 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6144 {
6145 p = restfpr (abfd, p, r);
6146 bfd_put_32 (abfd, BLR, p);
6147 return p + 4;
6148 }
6149
6150 static bfd_byte *
6151 savevr (bfd *abfd, bfd_byte *p, int r)
6152 {
6153 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6154 p = p + 4;
6155 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6156 return p + 4;
6157 }
6158
6159 static bfd_byte *
6160 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6161 {
6162 p = savevr (abfd, p, r);
6163 bfd_put_32 (abfd, BLR, p);
6164 return p + 4;
6165 }
6166
6167 static bfd_byte *
6168 restvr (bfd *abfd, bfd_byte *p, int r)
6169 {
6170 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6171 p = p + 4;
6172 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6173 return p + 4;
6174 }
6175
6176 static bfd_byte *
6177 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6178 {
6179 p = restvr (abfd, p, r);
6180 bfd_put_32 (abfd, BLR, p);
6181 return p + 4;
6182 }
6183
6184 /* Called via elf_link_hash_traverse to transfer dynamic linking
6185 information on function code symbol entries to their corresponding
6186 function descriptor symbol entries. */
6187
6188 static bfd_boolean
6189 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6190 {
6191 struct bfd_link_info *info;
6192 struct ppc_link_hash_table *htab;
6193 struct plt_entry *ent;
6194 struct ppc_link_hash_entry *fh;
6195 struct ppc_link_hash_entry *fdh;
6196 bfd_boolean force_local;
6197
6198 fh = (struct ppc_link_hash_entry *) h;
6199 if (fh->elf.root.type == bfd_link_hash_indirect)
6200 return TRUE;
6201
6202 info = inf;
6203 htab = ppc_hash_table (info);
6204 if (htab == NULL)
6205 return FALSE;
6206
6207 /* Resolve undefined references to dot-symbols as the value
6208 in the function descriptor, if we have one in a regular object.
6209 This is to satisfy cases like ".quad .foo". Calls to functions
6210 in dynamic objects are handled elsewhere. */
6211 if (fh->elf.root.type == bfd_link_hash_undefweak
6212 && fh->was_undefined
6213 && (fdh = defined_func_desc (fh)) != NULL
6214 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6215 && opd_entry_value (fdh->elf.root.u.def.section,
6216 fdh->elf.root.u.def.value,
6217 &fh->elf.root.u.def.section,
6218 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6219 {
6220 fh->elf.root.type = fdh->elf.root.type;
6221 fh->elf.forced_local = 1;
6222 fh->elf.def_regular = fdh->elf.def_regular;
6223 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6224 }
6225
6226 /* If this is a function code symbol, transfer dynamic linking
6227 information to the function descriptor symbol. */
6228 if (!fh->is_func)
6229 return TRUE;
6230
6231 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6232 if (ent->plt.refcount > 0)
6233 break;
6234 if (ent == NULL
6235 || fh->elf.root.root.string[0] != '.'
6236 || fh->elf.root.root.string[1] == '\0')
6237 return TRUE;
6238
6239 /* Find the corresponding function descriptor symbol. Create it
6240 as undefined if necessary. */
6241
6242 fdh = lookup_fdh (fh, htab);
6243 if (fdh == NULL
6244 && !info->executable
6245 && (fh->elf.root.type == bfd_link_hash_undefined
6246 || fh->elf.root.type == bfd_link_hash_undefweak))
6247 {
6248 fdh = make_fdh (info, fh);
6249 if (fdh == NULL)
6250 return FALSE;
6251 }
6252
6253 /* Fake function descriptors are made undefweak. If the function
6254 code symbol is strong undefined, make the fake sym the same.
6255 If the function code symbol is defined, then force the fake
6256 descriptor local; We can't support overriding of symbols in a
6257 shared library on a fake descriptor. */
6258
6259 if (fdh != NULL
6260 && fdh->fake
6261 && fdh->elf.root.type == bfd_link_hash_undefweak)
6262 {
6263 if (fh->elf.root.type == bfd_link_hash_undefined)
6264 {
6265 fdh->elf.root.type = bfd_link_hash_undefined;
6266 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6267 }
6268 else if (fh->elf.root.type == bfd_link_hash_defined
6269 || fh->elf.root.type == bfd_link_hash_defweak)
6270 {
6271 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6272 }
6273 }
6274
6275 if (fdh != NULL
6276 && !fdh->elf.forced_local
6277 && (!info->executable
6278 || fdh->elf.def_dynamic
6279 || fdh->elf.ref_dynamic
6280 || (fdh->elf.root.type == bfd_link_hash_undefweak
6281 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6282 {
6283 if (fdh->elf.dynindx == -1)
6284 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6285 return FALSE;
6286 fdh->elf.ref_regular |= fh->elf.ref_regular;
6287 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6288 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6289 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6290 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6291 {
6292 move_plt_plist (fh, fdh);
6293 fdh->elf.needs_plt = 1;
6294 }
6295 fdh->is_func_descriptor = 1;
6296 fdh->oh = fh;
6297 fh->oh = fdh;
6298 }
6299
6300 /* Now that the info is on the function descriptor, clear the
6301 function code sym info. Any function code syms for which we
6302 don't have a definition in a regular file, we force local.
6303 This prevents a shared library from exporting syms that have
6304 been imported from another library. Function code syms that
6305 are really in the library we must leave global to prevent the
6306 linker dragging in a definition from a static library. */
6307 force_local = (!fh->elf.def_regular
6308 || fdh == NULL
6309 || !fdh->elf.def_regular
6310 || fdh->elf.forced_local);
6311 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6312
6313 return TRUE;
6314 }
6315
6316 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6317 this hook to a) provide some gcc support functions, and b) transfer
6318 dynamic linking information gathered so far on function code symbol
6319 entries, to their corresponding function descriptor symbol entries. */
6320
6321 static bfd_boolean
6322 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6323 struct bfd_link_info *info)
6324 {
6325 struct ppc_link_hash_table *htab;
6326 unsigned int i;
6327 const struct sfpr_def_parms funcs[] =
6328 {
6329 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6330 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6331 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6332 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6333 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6334 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6335 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6336 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6337 { "._savef", 14, 31, savefpr, savefpr1_tail },
6338 { "._restf", 14, 31, restfpr, restfpr1_tail },
6339 { "_savevr_", 20, 31, savevr, savevr_tail },
6340 { "_restvr_", 20, 31, restvr, restvr_tail }
6341 };
6342
6343 htab = ppc_hash_table (info);
6344 if (htab == NULL)
6345 return FALSE;
6346
6347 if (htab->sfpr == NULL)
6348 /* We don't have any relocs. */
6349 return TRUE;
6350
6351 /* Provide any missing _save* and _rest* functions. */
6352 htab->sfpr->size = 0;
6353 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6354 if (!sfpr_define (info, &funcs[i]))
6355 return FALSE;
6356
6357 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6358
6359 if (htab->sfpr->size == 0)
6360 htab->sfpr->flags |= SEC_EXCLUDE;
6361
6362 return TRUE;
6363 }
6364
6365 /* Adjust a symbol defined by a dynamic object and referenced by a
6366 regular object. The current definition is in some section of the
6367 dynamic object, but we're not including those sections. We have to
6368 change the definition to something the rest of the link can
6369 understand. */
6370
6371 static bfd_boolean
6372 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6373 struct elf_link_hash_entry *h)
6374 {
6375 struct ppc_link_hash_table *htab;
6376 asection *s;
6377
6378 htab = ppc_hash_table (info);
6379 if (htab == NULL)
6380 return FALSE;
6381
6382 /* Deal with function syms. */
6383 if (h->type == STT_FUNC
6384 || h->type == STT_GNU_IFUNC
6385 || h->needs_plt)
6386 {
6387 /* Clear procedure linkage table information for any symbol that
6388 won't need a .plt entry. */
6389 struct plt_entry *ent;
6390 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6391 if (ent->plt.refcount > 0)
6392 break;
6393 if (ent == NULL
6394 || (h->type != STT_GNU_IFUNC
6395 && (SYMBOL_CALLS_LOCAL (info, h)
6396 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6397 && h->root.type == bfd_link_hash_undefweak))))
6398 {
6399 h->plt.plist = NULL;
6400 h->needs_plt = 0;
6401 }
6402 }
6403 else
6404 h->plt.plist = NULL;
6405
6406 /* If this is a weak symbol, and there is a real definition, the
6407 processor independent code will have arranged for us to see the
6408 real definition first, and we can just use the same value. */
6409 if (h->u.weakdef != NULL)
6410 {
6411 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6412 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6413 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6414 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6415 if (ELIMINATE_COPY_RELOCS)
6416 h->non_got_ref = h->u.weakdef->non_got_ref;
6417 return TRUE;
6418 }
6419
6420 /* If we are creating a shared library, we must presume that the
6421 only references to the symbol are via the global offset table.
6422 For such cases we need not do anything here; the relocations will
6423 be handled correctly by relocate_section. */
6424 if (info->shared)
6425 return TRUE;
6426
6427 /* If there are no references to this symbol that do not use the
6428 GOT, we don't need to generate a copy reloc. */
6429 if (!h->non_got_ref)
6430 return TRUE;
6431
6432 /* Don't generate a copy reloc for symbols defined in the executable. */
6433 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6434 return TRUE;
6435
6436 if (ELIMINATE_COPY_RELOCS)
6437 {
6438 struct ppc_link_hash_entry * eh;
6439 struct elf_dyn_relocs *p;
6440
6441 eh = (struct ppc_link_hash_entry *) h;
6442 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6443 {
6444 s = p->sec->output_section;
6445 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6446 break;
6447 }
6448
6449 /* If we didn't find any dynamic relocs in read-only sections, then
6450 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6451 if (p == NULL)
6452 {
6453 h->non_got_ref = 0;
6454 return TRUE;
6455 }
6456 }
6457
6458 if (h->plt.plist != NULL)
6459 {
6460 /* We should never get here, but unfortunately there are versions
6461 of gcc out there that improperly (for this ABI) put initialized
6462 function pointers, vtable refs and suchlike in read-only
6463 sections. Allow them to proceed, but warn that this might
6464 break at runtime. */
6465 info->callbacks->einfo
6466 (_("%P: copy reloc against `%s' requires lazy plt linking; "
6467 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6468 h->root.root.string);
6469 }
6470
6471 /* This is a reference to a symbol defined by a dynamic object which
6472 is not a function. */
6473
6474 if (h->size == 0)
6475 {
6476 info->callbacks->einfo (_("%P: dynamic variable `%s' is zero size\n"),
6477 h->root.root.string);
6478 return TRUE;
6479 }
6480
6481 /* We must allocate the symbol in our .dynbss section, which will
6482 become part of the .bss section of the executable. There will be
6483 an entry for this symbol in the .dynsym section. The dynamic
6484 object will contain position independent code, so all references
6485 from the dynamic object to this symbol will go through the global
6486 offset table. The dynamic linker will use the .dynsym entry to
6487 determine the address it must put in the global offset table, so
6488 both the dynamic object and the regular object will refer to the
6489 same memory location for the variable. */
6490
6491 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6492 to copy the initial value out of the dynamic object and into the
6493 runtime process image. We need to remember the offset into the
6494 .rela.bss section we are going to use. */
6495 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6496 {
6497 htab->relbss->size += sizeof (Elf64_External_Rela);
6498 h->needs_copy = 1;
6499 }
6500
6501 s = htab->dynbss;
6502
6503 return _bfd_elf_adjust_dynamic_copy (h, s);
6504 }
6505
6506 /* If given a function descriptor symbol, hide both the function code
6507 sym and the descriptor. */
6508 static void
6509 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6510 struct elf_link_hash_entry *h,
6511 bfd_boolean force_local)
6512 {
6513 struct ppc_link_hash_entry *eh;
6514 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6515
6516 eh = (struct ppc_link_hash_entry *) h;
6517 if (eh->is_func_descriptor)
6518 {
6519 struct ppc_link_hash_entry *fh = eh->oh;
6520
6521 if (fh == NULL)
6522 {
6523 const char *p, *q;
6524 struct ppc_link_hash_table *htab;
6525 char save;
6526
6527 /* We aren't supposed to use alloca in BFD because on
6528 systems which do not have alloca the version in libiberty
6529 calls xmalloc, which might cause the program to crash
6530 when it runs out of memory. This function doesn't have a
6531 return status, so there's no way to gracefully return an
6532 error. So cheat. We know that string[-1] can be safely
6533 accessed; It's either a string in an ELF string table,
6534 or allocated in an objalloc structure. */
6535
6536 p = eh->elf.root.root.string - 1;
6537 save = *p;
6538 *(char *) p = '.';
6539 htab = ppc_hash_table (info);
6540 if (htab == NULL)
6541 return;
6542
6543 fh = (struct ppc_link_hash_entry *)
6544 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6545 *(char *) p = save;
6546
6547 /* Unfortunately, if it so happens that the string we were
6548 looking for was allocated immediately before this string,
6549 then we overwrote the string terminator. That's the only
6550 reason the lookup should fail. */
6551 if (fh == NULL)
6552 {
6553 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6554 while (q >= eh->elf.root.root.string && *q == *p)
6555 --q, --p;
6556 if (q < eh->elf.root.root.string && *p == '.')
6557 fh = (struct ppc_link_hash_entry *)
6558 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6559 }
6560 if (fh != NULL)
6561 {
6562 eh->oh = fh;
6563 fh->oh = eh;
6564 }
6565 }
6566 if (fh != NULL)
6567 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6568 }
6569 }
6570
6571 static bfd_boolean
6572 get_sym_h (struct elf_link_hash_entry **hp,
6573 Elf_Internal_Sym **symp,
6574 asection **symsecp,
6575 unsigned char **tls_maskp,
6576 Elf_Internal_Sym **locsymsp,
6577 unsigned long r_symndx,
6578 bfd *ibfd)
6579 {
6580 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6581
6582 if (r_symndx >= symtab_hdr->sh_info)
6583 {
6584 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6585 struct elf_link_hash_entry *h;
6586
6587 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6588 h = elf_follow_link (h);
6589
6590 if (hp != NULL)
6591 *hp = h;
6592
6593 if (symp != NULL)
6594 *symp = NULL;
6595
6596 if (symsecp != NULL)
6597 {
6598 asection *symsec = NULL;
6599 if (h->root.type == bfd_link_hash_defined
6600 || h->root.type == bfd_link_hash_defweak)
6601 symsec = h->root.u.def.section;
6602 *symsecp = symsec;
6603 }
6604
6605 if (tls_maskp != NULL)
6606 {
6607 struct ppc_link_hash_entry *eh;
6608
6609 eh = (struct ppc_link_hash_entry *) h;
6610 *tls_maskp = &eh->tls_mask;
6611 }
6612 }
6613 else
6614 {
6615 Elf_Internal_Sym *sym;
6616 Elf_Internal_Sym *locsyms = *locsymsp;
6617
6618 if (locsyms == NULL)
6619 {
6620 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6621 if (locsyms == NULL)
6622 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6623 symtab_hdr->sh_info,
6624 0, NULL, NULL, NULL);
6625 if (locsyms == NULL)
6626 return FALSE;
6627 *locsymsp = locsyms;
6628 }
6629 sym = locsyms + r_symndx;
6630
6631 if (hp != NULL)
6632 *hp = NULL;
6633
6634 if (symp != NULL)
6635 *symp = sym;
6636
6637 if (symsecp != NULL)
6638 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6639
6640 if (tls_maskp != NULL)
6641 {
6642 struct got_entry **lgot_ents;
6643 unsigned char *tls_mask;
6644
6645 tls_mask = NULL;
6646 lgot_ents = elf_local_got_ents (ibfd);
6647 if (lgot_ents != NULL)
6648 {
6649 struct plt_entry **local_plt = (struct plt_entry **)
6650 (lgot_ents + symtab_hdr->sh_info);
6651 unsigned char *lgot_masks = (unsigned char *)
6652 (local_plt + symtab_hdr->sh_info);
6653 tls_mask = &lgot_masks[r_symndx];
6654 }
6655 *tls_maskp = tls_mask;
6656 }
6657 }
6658 return TRUE;
6659 }
6660
6661 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6662 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6663 type suitable for optimization, and 1 otherwise. */
6664
6665 static int
6666 get_tls_mask (unsigned char **tls_maskp,
6667 unsigned long *toc_symndx,
6668 bfd_vma *toc_addend,
6669 Elf_Internal_Sym **locsymsp,
6670 const Elf_Internal_Rela *rel,
6671 bfd *ibfd)
6672 {
6673 unsigned long r_symndx;
6674 int next_r;
6675 struct elf_link_hash_entry *h;
6676 Elf_Internal_Sym *sym;
6677 asection *sec;
6678 bfd_vma off;
6679
6680 r_symndx = ELF64_R_SYM (rel->r_info);
6681 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6682 return 0;
6683
6684 if ((*tls_maskp != NULL && **tls_maskp != 0)
6685 || sec == NULL
6686 || ppc64_elf_section_data (sec) == NULL
6687 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6688 return 1;
6689
6690 /* Look inside a TOC section too. */
6691 if (h != NULL)
6692 {
6693 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6694 off = h->root.u.def.value;
6695 }
6696 else
6697 off = sym->st_value;
6698 off += rel->r_addend;
6699 BFD_ASSERT (off % 8 == 0);
6700 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6701 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6702 if (toc_symndx != NULL)
6703 *toc_symndx = r_symndx;
6704 if (toc_addend != NULL)
6705 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6706 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6707 return 0;
6708 if ((h == NULL || is_static_defined (h))
6709 && (next_r == -1 || next_r == -2))
6710 return 1 - next_r;
6711 return 1;
6712 }
6713
6714 /* Adjust all global syms defined in opd sections. In gcc generated
6715 code for the old ABI, these will already have been done. */
6716
6717 static bfd_boolean
6718 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6719 {
6720 struct ppc_link_hash_entry *eh;
6721 asection *sym_sec;
6722 struct _opd_sec_data *opd;
6723
6724 if (h->root.type == bfd_link_hash_indirect)
6725 return TRUE;
6726
6727 if (h->root.type != bfd_link_hash_defined
6728 && h->root.type != bfd_link_hash_defweak)
6729 return TRUE;
6730
6731 eh = (struct ppc_link_hash_entry *) h;
6732 if (eh->adjust_done)
6733 return TRUE;
6734
6735 sym_sec = eh->elf.root.u.def.section;
6736 opd = get_opd_info (sym_sec);
6737 if (opd != NULL && opd->adjust != NULL)
6738 {
6739 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6740 if (adjust == -1)
6741 {
6742 /* This entry has been deleted. */
6743 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6744 if (dsec == NULL)
6745 {
6746 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6747 if (elf_discarded_section (dsec))
6748 {
6749 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6750 break;
6751 }
6752 }
6753 eh->elf.root.u.def.value = 0;
6754 eh->elf.root.u.def.section = dsec;
6755 }
6756 else
6757 eh->elf.root.u.def.value += adjust;
6758 eh->adjust_done = 1;
6759 }
6760 return TRUE;
6761 }
6762
6763 /* Handles decrementing dynamic reloc counts for the reloc specified by
6764 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6765 have already been determined. */
6766
6767 static bfd_boolean
6768 dec_dynrel_count (bfd_vma r_info,
6769 asection *sec,
6770 struct bfd_link_info *info,
6771 Elf_Internal_Sym **local_syms,
6772 struct elf_link_hash_entry *h,
6773 asection *sym_sec)
6774 {
6775 enum elf_ppc64_reloc_type r_type;
6776 struct elf_dyn_relocs *p;
6777 struct elf_dyn_relocs **pp;
6778
6779 /* Can this reloc be dynamic? This switch, and later tests here
6780 should be kept in sync with the code in check_relocs. */
6781 r_type = ELF64_R_TYPE (r_info);
6782 switch (r_type)
6783 {
6784 default:
6785 return TRUE;
6786
6787 case R_PPC64_TPREL16:
6788 case R_PPC64_TPREL16_LO:
6789 case R_PPC64_TPREL16_HI:
6790 case R_PPC64_TPREL16_HA:
6791 case R_PPC64_TPREL16_DS:
6792 case R_PPC64_TPREL16_LO_DS:
6793 case R_PPC64_TPREL16_HIGHER:
6794 case R_PPC64_TPREL16_HIGHERA:
6795 case R_PPC64_TPREL16_HIGHEST:
6796 case R_PPC64_TPREL16_HIGHESTA:
6797 if (!info->shared)
6798 return TRUE;
6799
6800 case R_PPC64_TPREL64:
6801 case R_PPC64_DTPMOD64:
6802 case R_PPC64_DTPREL64:
6803 case R_PPC64_ADDR64:
6804 case R_PPC64_REL30:
6805 case R_PPC64_REL32:
6806 case R_PPC64_REL64:
6807 case R_PPC64_ADDR14:
6808 case R_PPC64_ADDR14_BRNTAKEN:
6809 case R_PPC64_ADDR14_BRTAKEN:
6810 case R_PPC64_ADDR16:
6811 case R_PPC64_ADDR16_DS:
6812 case R_PPC64_ADDR16_HA:
6813 case R_PPC64_ADDR16_HI:
6814 case R_PPC64_ADDR16_HIGHER:
6815 case R_PPC64_ADDR16_HIGHERA:
6816 case R_PPC64_ADDR16_HIGHEST:
6817 case R_PPC64_ADDR16_HIGHESTA:
6818 case R_PPC64_ADDR16_LO:
6819 case R_PPC64_ADDR16_LO_DS:
6820 case R_PPC64_ADDR24:
6821 case R_PPC64_ADDR32:
6822 case R_PPC64_UADDR16:
6823 case R_PPC64_UADDR32:
6824 case R_PPC64_UADDR64:
6825 case R_PPC64_TOC:
6826 break;
6827 }
6828
6829 if (local_syms != NULL)
6830 {
6831 unsigned long r_symndx;
6832 Elf_Internal_Sym *sym;
6833 bfd *ibfd = sec->owner;
6834
6835 r_symndx = ELF64_R_SYM (r_info);
6836 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6837 return FALSE;
6838 }
6839
6840 if ((info->shared
6841 && (must_be_dyn_reloc (info, r_type)
6842 || (h != NULL
6843 && (!info->symbolic
6844 || h->root.type == bfd_link_hash_defweak
6845 || !h->def_regular))))
6846 || (ELIMINATE_COPY_RELOCS
6847 && !info->shared
6848 && h != NULL
6849 && (h->root.type == bfd_link_hash_defweak
6850 || !h->def_regular)))
6851 ;
6852 else
6853 return TRUE;
6854
6855 if (h != NULL)
6856 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6857 else
6858 {
6859 if (sym_sec != NULL)
6860 {
6861 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6862 pp = (struct elf_dyn_relocs **) vpp;
6863 }
6864 else
6865 {
6866 void *vpp = &elf_section_data (sec)->local_dynrel;
6867 pp = (struct elf_dyn_relocs **) vpp;
6868 }
6869
6870 /* elf_gc_sweep may have already removed all dyn relocs associated
6871 with local syms for a given section. Don't report a dynreloc
6872 miscount. */
6873 if (*pp == NULL)
6874 return TRUE;
6875 }
6876
6877 while ((p = *pp) != NULL)
6878 {
6879 if (p->sec == sec)
6880 {
6881 if (!must_be_dyn_reloc (info, r_type))
6882 p->pc_count -= 1;
6883 p->count -= 1;
6884 if (p->count == 0)
6885 *pp = p->next;
6886 return TRUE;
6887 }
6888 pp = &p->next;
6889 }
6890
6891 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
6892 sec->owner, sec);
6893 bfd_set_error (bfd_error_bad_value);
6894 return FALSE;
6895 }
6896
6897 /* Remove unused Official Procedure Descriptor entries. Currently we
6898 only remove those associated with functions in discarded link-once
6899 sections, or weakly defined functions that have been overridden. It
6900 would be possible to remove many more entries for statically linked
6901 applications. */
6902
6903 bfd_boolean
6904 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6905 {
6906 bfd *ibfd;
6907 bfd_boolean some_edited = FALSE;
6908 asection *need_pad = NULL;
6909
6910 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6911 {
6912 asection *sec;
6913 Elf_Internal_Rela *relstart, *rel, *relend;
6914 Elf_Internal_Shdr *symtab_hdr;
6915 Elf_Internal_Sym *local_syms;
6916 bfd_vma offset;
6917 struct _opd_sec_data *opd;
6918 bfd_boolean need_edit, add_aux_fields;
6919 bfd_size_type cnt_16b = 0;
6920
6921 if (!is_ppc64_elf (ibfd))
6922 continue;
6923
6924 sec = bfd_get_section_by_name (ibfd, ".opd");
6925 if (sec == NULL || sec->size == 0)
6926 continue;
6927
6928 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6929 continue;
6930
6931 if (sec->output_section == bfd_abs_section_ptr)
6932 continue;
6933
6934 /* Look through the section relocs. */
6935 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6936 continue;
6937
6938 local_syms = NULL;
6939 symtab_hdr = &elf_symtab_hdr (ibfd);
6940
6941 /* Read the relocations. */
6942 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6943 info->keep_memory);
6944 if (relstart == NULL)
6945 return FALSE;
6946
6947 /* First run through the relocs to check they are sane, and to
6948 determine whether we need to edit this opd section. */
6949 need_edit = FALSE;
6950 need_pad = sec;
6951 offset = 0;
6952 relend = relstart + sec->reloc_count;
6953 for (rel = relstart; rel < relend; )
6954 {
6955 enum elf_ppc64_reloc_type r_type;
6956 unsigned long r_symndx;
6957 asection *sym_sec;
6958 struct elf_link_hash_entry *h;
6959 Elf_Internal_Sym *sym;
6960
6961 /* .opd contains a regular array of 16 or 24 byte entries. We're
6962 only interested in the reloc pointing to a function entry
6963 point. */
6964 if (rel->r_offset != offset
6965 || rel + 1 >= relend
6966 || (rel + 1)->r_offset != offset + 8)
6967 {
6968 /* If someone messes with .opd alignment then after a
6969 "ld -r" we might have padding in the middle of .opd.
6970 Also, there's nothing to prevent someone putting
6971 something silly in .opd with the assembler. No .opd
6972 optimization for them! */
6973 broken_opd:
6974 (*_bfd_error_handler)
6975 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6976 need_edit = FALSE;
6977 break;
6978 }
6979
6980 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6981 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6982 {
6983 (*_bfd_error_handler)
6984 (_("%B: unexpected reloc type %u in .opd section"),
6985 ibfd, r_type);
6986 need_edit = FALSE;
6987 break;
6988 }
6989
6990 r_symndx = ELF64_R_SYM (rel->r_info);
6991 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6992 r_symndx, ibfd))
6993 goto error_ret;
6994
6995 if (sym_sec == NULL || sym_sec->owner == NULL)
6996 {
6997 const char *sym_name;
6998 if (h != NULL)
6999 sym_name = h->root.root.string;
7000 else
7001 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7002 sym_sec);
7003
7004 (*_bfd_error_handler)
7005 (_("%B: undefined sym `%s' in .opd section"),
7006 ibfd, sym_name);
7007 need_edit = FALSE;
7008 break;
7009 }
7010
7011 /* opd entries are always for functions defined in the
7012 current input bfd. If the symbol isn't defined in the
7013 input bfd, then we won't be using the function in this
7014 bfd; It must be defined in a linkonce section in another
7015 bfd, or is weak. It's also possible that we are
7016 discarding the function due to a linker script /DISCARD/,
7017 which we test for via the output_section. */
7018 if (sym_sec->owner != ibfd
7019 || sym_sec->output_section == bfd_abs_section_ptr)
7020 need_edit = TRUE;
7021
7022 rel += 2;
7023 if (rel == relend
7024 || (rel + 1 == relend && rel->r_offset == offset + 16))
7025 {
7026 if (sec->size == offset + 24)
7027 {
7028 need_pad = NULL;
7029 break;
7030 }
7031 if (rel == relend && sec->size == offset + 16)
7032 {
7033 cnt_16b++;
7034 break;
7035 }
7036 goto broken_opd;
7037 }
7038
7039 if (rel->r_offset == offset + 24)
7040 offset += 24;
7041 else if (rel->r_offset != offset + 16)
7042 goto broken_opd;
7043 else if (rel + 1 < relend
7044 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7045 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7046 {
7047 offset += 16;
7048 cnt_16b++;
7049 }
7050 else if (rel + 2 < relend
7051 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7052 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7053 {
7054 offset += 24;
7055 rel += 1;
7056 }
7057 else
7058 goto broken_opd;
7059 }
7060
7061 add_aux_fields = non_overlapping && cnt_16b > 0;
7062
7063 if (need_edit || add_aux_fields)
7064 {
7065 Elf_Internal_Rela *write_rel;
7066 Elf_Internal_Shdr *rel_hdr;
7067 bfd_byte *rptr, *wptr;
7068 bfd_byte *new_contents;
7069 bfd_boolean skip;
7070 long opd_ent_size;
7071 bfd_size_type amt;
7072
7073 new_contents = NULL;
7074 amt = sec->size * sizeof (long) / 8;
7075 opd = &ppc64_elf_section_data (sec)->u.opd;
7076 opd->adjust = bfd_zalloc (sec->owner, amt);
7077 if (opd->adjust == NULL)
7078 return FALSE;
7079 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7080
7081 /* This seems a waste of time as input .opd sections are all
7082 zeros as generated by gcc, but I suppose there's no reason
7083 this will always be so. We might start putting something in
7084 the third word of .opd entries. */
7085 if ((sec->flags & SEC_IN_MEMORY) == 0)
7086 {
7087 bfd_byte *loc;
7088 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7089 {
7090 if (loc != NULL)
7091 free (loc);
7092 error_ret:
7093 if (local_syms != NULL
7094 && symtab_hdr->contents != (unsigned char *) local_syms)
7095 free (local_syms);
7096 if (elf_section_data (sec)->relocs != relstart)
7097 free (relstart);
7098 return FALSE;
7099 }
7100 sec->contents = loc;
7101 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7102 }
7103
7104 elf_section_data (sec)->relocs = relstart;
7105
7106 new_contents = sec->contents;
7107 if (add_aux_fields)
7108 {
7109 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7110 if (new_contents == NULL)
7111 return FALSE;
7112 need_pad = FALSE;
7113 }
7114 wptr = new_contents;
7115 rptr = sec->contents;
7116
7117 write_rel = relstart;
7118 skip = FALSE;
7119 offset = 0;
7120 opd_ent_size = 0;
7121 for (rel = relstart; rel < relend; rel++)
7122 {
7123 unsigned long r_symndx;
7124 asection *sym_sec;
7125 struct elf_link_hash_entry *h;
7126 Elf_Internal_Sym *sym;
7127
7128 r_symndx = ELF64_R_SYM (rel->r_info);
7129 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7130 r_symndx, ibfd))
7131 goto error_ret;
7132
7133 if (rel->r_offset == offset)
7134 {
7135 struct ppc_link_hash_entry *fdh = NULL;
7136
7137 /* See if the .opd entry is full 24 byte or
7138 16 byte (with fd_aux entry overlapped with next
7139 fd_func). */
7140 opd_ent_size = 24;
7141 if ((rel + 2 == relend && sec->size == offset + 16)
7142 || (rel + 3 < relend
7143 && rel[2].r_offset == offset + 16
7144 && rel[3].r_offset == offset + 24
7145 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7146 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7147 opd_ent_size = 16;
7148
7149 if (h != NULL
7150 && h->root.root.string[0] == '.')
7151 {
7152 struct ppc_link_hash_table *htab;
7153
7154 htab = ppc_hash_table (info);
7155 if (htab != NULL)
7156 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7157 htab);
7158 if (fdh != NULL
7159 && fdh->elf.root.type != bfd_link_hash_defined
7160 && fdh->elf.root.type != bfd_link_hash_defweak)
7161 fdh = NULL;
7162 }
7163
7164 skip = (sym_sec->owner != ibfd
7165 || sym_sec->output_section == bfd_abs_section_ptr);
7166 if (skip)
7167 {
7168 if (fdh != NULL && sym_sec->owner == ibfd)
7169 {
7170 /* Arrange for the function descriptor sym
7171 to be dropped. */
7172 fdh->elf.root.u.def.value = 0;
7173 fdh->elf.root.u.def.section = sym_sec;
7174 }
7175 opd->adjust[rel->r_offset / 8] = -1;
7176 }
7177 else
7178 {
7179 /* We'll be keeping this opd entry. */
7180
7181 if (fdh != NULL)
7182 {
7183 /* Redefine the function descriptor symbol to
7184 this location in the opd section. It is
7185 necessary to update the value here rather
7186 than using an array of adjustments as we do
7187 for local symbols, because various places
7188 in the generic ELF code use the value
7189 stored in u.def.value. */
7190 fdh->elf.root.u.def.value = wptr - new_contents;
7191 fdh->adjust_done = 1;
7192 }
7193
7194 /* Local syms are a bit tricky. We could
7195 tweak them as they can be cached, but
7196 we'd need to look through the local syms
7197 for the function descriptor sym which we
7198 don't have at the moment. So keep an
7199 array of adjustments. */
7200 opd->adjust[rel->r_offset / 8]
7201 = (wptr - new_contents) - (rptr - sec->contents);
7202
7203 if (wptr != rptr)
7204 memcpy (wptr, rptr, opd_ent_size);
7205 wptr += opd_ent_size;
7206 if (add_aux_fields && opd_ent_size == 16)
7207 {
7208 memset (wptr, '\0', 8);
7209 wptr += 8;
7210 }
7211 }
7212 rptr += opd_ent_size;
7213 offset += opd_ent_size;
7214 }
7215
7216 if (skip)
7217 {
7218 if (!NO_OPD_RELOCS
7219 && !info->relocatable
7220 && !dec_dynrel_count (rel->r_info, sec, info,
7221 NULL, h, sym_sec))
7222 goto error_ret;
7223 }
7224 else
7225 {
7226 /* We need to adjust any reloc offsets to point to the
7227 new opd entries. While we're at it, we may as well
7228 remove redundant relocs. */
7229 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7230 if (write_rel != rel)
7231 memcpy (write_rel, rel, sizeof (*rel));
7232 ++write_rel;
7233 }
7234 }
7235
7236 sec->size = wptr - new_contents;
7237 sec->reloc_count = write_rel - relstart;
7238 if (add_aux_fields)
7239 {
7240 free (sec->contents);
7241 sec->contents = new_contents;
7242 }
7243
7244 /* Fudge the header size too, as this is used later in
7245 elf_bfd_final_link if we are emitting relocs. */
7246 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7247 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7248 some_edited = TRUE;
7249 }
7250 else if (elf_section_data (sec)->relocs != relstart)
7251 free (relstart);
7252
7253 if (local_syms != NULL
7254 && symtab_hdr->contents != (unsigned char *) local_syms)
7255 {
7256 if (!info->keep_memory)
7257 free (local_syms);
7258 else
7259 symtab_hdr->contents = (unsigned char *) local_syms;
7260 }
7261 }
7262
7263 if (some_edited)
7264 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7265
7266 /* If we are doing a final link and the last .opd entry is just 16 byte
7267 long, add a 8 byte padding after it. */
7268 if (need_pad != NULL && !info->relocatable)
7269 {
7270 bfd_byte *p;
7271
7272 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7273 {
7274 BFD_ASSERT (need_pad->size > 0);
7275
7276 p = bfd_malloc (need_pad->size + 8);
7277 if (p == NULL)
7278 return FALSE;
7279
7280 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7281 p, 0, need_pad->size))
7282 return FALSE;
7283
7284 need_pad->contents = p;
7285 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7286 }
7287 else
7288 {
7289 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7290 if (p == NULL)
7291 return FALSE;
7292
7293 need_pad->contents = p;
7294 }
7295
7296 memset (need_pad->contents + need_pad->size, 0, 8);
7297 need_pad->size += 8;
7298 }
7299
7300 return TRUE;
7301 }
7302
7303 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7304
7305 asection *
7306 ppc64_elf_tls_setup (struct bfd_link_info *info,
7307 int no_tls_get_addr_opt,
7308 int *no_multi_toc)
7309 {
7310 struct ppc_link_hash_table *htab;
7311
7312 htab = ppc_hash_table (info);
7313 if (htab == NULL)
7314 return NULL;
7315
7316 if (*no_multi_toc)
7317 htab->do_multi_toc = 0;
7318 else if (!htab->do_multi_toc)
7319 *no_multi_toc = 1;
7320
7321 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7322 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7323 FALSE, FALSE, TRUE));
7324 /* Move dynamic linking info to the function descriptor sym. */
7325 if (htab->tls_get_addr != NULL)
7326 func_desc_adjust (&htab->tls_get_addr->elf, info);
7327 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7328 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7329 FALSE, FALSE, TRUE));
7330 if (!no_tls_get_addr_opt)
7331 {
7332 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7333
7334 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7335 FALSE, FALSE, TRUE);
7336 if (opt != NULL)
7337 func_desc_adjust (opt, info);
7338 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7339 FALSE, FALSE, TRUE);
7340 if (opt_fd != NULL
7341 && (opt_fd->root.type == bfd_link_hash_defined
7342 || opt_fd->root.type == bfd_link_hash_defweak))
7343 {
7344 /* If glibc supports an optimized __tls_get_addr call stub,
7345 signalled by the presence of __tls_get_addr_opt, and we'll
7346 be calling __tls_get_addr via a plt call stub, then
7347 make __tls_get_addr point to __tls_get_addr_opt. */
7348 tga_fd = &htab->tls_get_addr_fd->elf;
7349 if (htab->elf.dynamic_sections_created
7350 && tga_fd != NULL
7351 && (tga_fd->type == STT_FUNC
7352 || tga_fd->needs_plt)
7353 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7354 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7355 && tga_fd->root.type == bfd_link_hash_undefweak)))
7356 {
7357 struct plt_entry *ent;
7358
7359 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7360 if (ent->plt.refcount > 0)
7361 break;
7362 if (ent != NULL)
7363 {
7364 tga_fd->root.type = bfd_link_hash_indirect;
7365 tga_fd->root.u.i.link = &opt_fd->root;
7366 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7367 if (opt_fd->dynindx != -1)
7368 {
7369 /* Use __tls_get_addr_opt in dynamic relocations. */
7370 opt_fd->dynindx = -1;
7371 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7372 opt_fd->dynstr_index);
7373 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7374 return NULL;
7375 }
7376 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7377 tga = &htab->tls_get_addr->elf;
7378 if (opt != NULL && tga != NULL)
7379 {
7380 tga->root.type = bfd_link_hash_indirect;
7381 tga->root.u.i.link = &opt->root;
7382 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7383 _bfd_elf_link_hash_hide_symbol (info, opt,
7384 tga->forced_local);
7385 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7386 }
7387 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7388 htab->tls_get_addr_fd->is_func_descriptor = 1;
7389 if (htab->tls_get_addr != NULL)
7390 {
7391 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7392 htab->tls_get_addr->is_func = 1;
7393 }
7394 }
7395 }
7396 }
7397 else
7398 no_tls_get_addr_opt = TRUE;
7399 }
7400 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7401 return _bfd_elf_tls_setup (info->output_bfd, info);
7402 }
7403
7404 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7405 HASH1 or HASH2. */
7406
7407 static bfd_boolean
7408 branch_reloc_hash_match (const bfd *ibfd,
7409 const Elf_Internal_Rela *rel,
7410 const struct ppc_link_hash_entry *hash1,
7411 const struct ppc_link_hash_entry *hash2)
7412 {
7413 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7414 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7415 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7416
7417 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7418 {
7419 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7420 struct elf_link_hash_entry *h;
7421
7422 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7423 h = elf_follow_link (h);
7424 if (h == &hash1->elf || h == &hash2->elf)
7425 return TRUE;
7426 }
7427 return FALSE;
7428 }
7429
7430 /* Run through all the TLS relocs looking for optimization
7431 opportunities. The linker has been hacked (see ppc64elf.em) to do
7432 a preliminary section layout so that we know the TLS segment
7433 offsets. We can't optimize earlier because some optimizations need
7434 to know the tp offset, and we need to optimize before allocating
7435 dynamic relocations. */
7436
7437 bfd_boolean
7438 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7439 {
7440 bfd *ibfd;
7441 asection *sec;
7442 struct ppc_link_hash_table *htab;
7443 unsigned char *toc_ref;
7444 int pass;
7445
7446 if (info->relocatable || !info->executable)
7447 return TRUE;
7448
7449 htab = ppc_hash_table (info);
7450 if (htab == NULL)
7451 return FALSE;
7452
7453 /* Make two passes over the relocs. On the first pass, mark toc
7454 entries involved with tls relocs, and check that tls relocs
7455 involved in setting up a tls_get_addr call are indeed followed by
7456 such a call. If they are not, we can't do any tls optimization.
7457 On the second pass twiddle tls_mask flags to notify
7458 relocate_section that optimization can be done, and adjust got
7459 and plt refcounts. */
7460 toc_ref = NULL;
7461 for (pass = 0; pass < 2; ++pass)
7462 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7463 {
7464 Elf_Internal_Sym *locsyms = NULL;
7465 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7466
7467 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7468 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7469 {
7470 Elf_Internal_Rela *relstart, *rel, *relend;
7471 bfd_boolean found_tls_get_addr_arg = 0;
7472
7473 /* Read the relocations. */
7474 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7475 info->keep_memory);
7476 if (relstart == NULL)
7477 return FALSE;
7478
7479 relend = relstart + sec->reloc_count;
7480 for (rel = relstart; rel < relend; rel++)
7481 {
7482 enum elf_ppc64_reloc_type r_type;
7483 unsigned long r_symndx;
7484 struct elf_link_hash_entry *h;
7485 Elf_Internal_Sym *sym;
7486 asection *sym_sec;
7487 unsigned char *tls_mask;
7488 unsigned char tls_set, tls_clear, tls_type = 0;
7489 bfd_vma value;
7490 bfd_boolean ok_tprel, is_local;
7491 long toc_ref_index = 0;
7492 int expecting_tls_get_addr = 0;
7493 bfd_boolean ret = FALSE;
7494
7495 r_symndx = ELF64_R_SYM (rel->r_info);
7496 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7497 r_symndx, ibfd))
7498 {
7499 err_free_rel:
7500 if (elf_section_data (sec)->relocs != relstart)
7501 free (relstart);
7502 if (toc_ref != NULL)
7503 free (toc_ref);
7504 if (locsyms != NULL
7505 && (elf_symtab_hdr (ibfd).contents
7506 != (unsigned char *) locsyms))
7507 free (locsyms);
7508 return ret;
7509 }
7510
7511 if (h != NULL)
7512 {
7513 if (h->root.type == bfd_link_hash_defined
7514 || h->root.type == bfd_link_hash_defweak)
7515 value = h->root.u.def.value;
7516 else if (h->root.type == bfd_link_hash_undefweak)
7517 value = 0;
7518 else
7519 {
7520 found_tls_get_addr_arg = 0;
7521 continue;
7522 }
7523 }
7524 else
7525 /* Symbols referenced by TLS relocs must be of type
7526 STT_TLS. So no need for .opd local sym adjust. */
7527 value = sym->st_value;
7528
7529 ok_tprel = FALSE;
7530 is_local = FALSE;
7531 if (h == NULL
7532 || !h->def_dynamic)
7533 {
7534 is_local = TRUE;
7535 if (h != NULL
7536 && h->root.type == bfd_link_hash_undefweak)
7537 ok_tprel = TRUE;
7538 else
7539 {
7540 value += sym_sec->output_offset;
7541 value += sym_sec->output_section->vma;
7542 value -= htab->elf.tls_sec->vma;
7543 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7544 < (bfd_vma) 1 << 32);
7545 }
7546 }
7547
7548 r_type = ELF64_R_TYPE (rel->r_info);
7549 /* If this section has old-style __tls_get_addr calls
7550 without marker relocs, then check that each
7551 __tls_get_addr call reloc is preceded by a reloc
7552 that conceivably belongs to the __tls_get_addr arg
7553 setup insn. If we don't find matching arg setup
7554 relocs, don't do any tls optimization. */
7555 if (pass == 0
7556 && sec->has_tls_get_addr_call
7557 && h != NULL
7558 && (h == &htab->tls_get_addr->elf
7559 || h == &htab->tls_get_addr_fd->elf)
7560 && !found_tls_get_addr_arg
7561 && is_branch_reloc (r_type))
7562 {
7563 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7564 "TLS optimization disabled\n"),
7565 ibfd, sec, rel->r_offset);
7566 ret = TRUE;
7567 goto err_free_rel;
7568 }
7569
7570 found_tls_get_addr_arg = 0;
7571 switch (r_type)
7572 {
7573 case R_PPC64_GOT_TLSLD16:
7574 case R_PPC64_GOT_TLSLD16_LO:
7575 expecting_tls_get_addr = 1;
7576 found_tls_get_addr_arg = 1;
7577 /* Fall thru */
7578
7579 case R_PPC64_GOT_TLSLD16_HI:
7580 case R_PPC64_GOT_TLSLD16_HA:
7581 /* These relocs should never be against a symbol
7582 defined in a shared lib. Leave them alone if
7583 that turns out to be the case. */
7584 if (!is_local)
7585 continue;
7586
7587 /* LD -> LE */
7588 tls_set = 0;
7589 tls_clear = TLS_LD;
7590 tls_type = TLS_TLS | TLS_LD;
7591 break;
7592
7593 case R_PPC64_GOT_TLSGD16:
7594 case R_PPC64_GOT_TLSGD16_LO:
7595 expecting_tls_get_addr = 1;
7596 found_tls_get_addr_arg = 1;
7597 /* Fall thru */
7598
7599 case R_PPC64_GOT_TLSGD16_HI:
7600 case R_PPC64_GOT_TLSGD16_HA:
7601 if (ok_tprel)
7602 /* GD -> LE */
7603 tls_set = 0;
7604 else
7605 /* GD -> IE */
7606 tls_set = TLS_TLS | TLS_TPRELGD;
7607 tls_clear = TLS_GD;
7608 tls_type = TLS_TLS | TLS_GD;
7609 break;
7610
7611 case R_PPC64_GOT_TPREL16_DS:
7612 case R_PPC64_GOT_TPREL16_LO_DS:
7613 case R_PPC64_GOT_TPREL16_HI:
7614 case R_PPC64_GOT_TPREL16_HA:
7615 if (ok_tprel)
7616 {
7617 /* IE -> LE */
7618 tls_set = 0;
7619 tls_clear = TLS_TPREL;
7620 tls_type = TLS_TLS | TLS_TPREL;
7621 break;
7622 }
7623 continue;
7624
7625 case R_PPC64_TLSGD:
7626 case R_PPC64_TLSLD:
7627 found_tls_get_addr_arg = 1;
7628 /* Fall thru */
7629
7630 case R_PPC64_TLS:
7631 case R_PPC64_TOC16:
7632 case R_PPC64_TOC16_LO:
7633 if (sym_sec == NULL || sym_sec != toc)
7634 continue;
7635
7636 /* Mark this toc entry as referenced by a TLS
7637 code sequence. We can do that now in the
7638 case of R_PPC64_TLS, and after checking for
7639 tls_get_addr for the TOC16 relocs. */
7640 if (toc_ref == NULL)
7641 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7642 if (toc_ref == NULL)
7643 goto err_free_rel;
7644
7645 if (h != NULL)
7646 value = h->root.u.def.value;
7647 else
7648 value = sym->st_value;
7649 value += rel->r_addend;
7650 BFD_ASSERT (value < toc->size && value % 8 == 0);
7651 toc_ref_index = (value + toc->output_offset) / 8;
7652 if (r_type == R_PPC64_TLS
7653 || r_type == R_PPC64_TLSGD
7654 || r_type == R_PPC64_TLSLD)
7655 {
7656 toc_ref[toc_ref_index] = 1;
7657 continue;
7658 }
7659
7660 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7661 continue;
7662
7663 tls_set = 0;
7664 tls_clear = 0;
7665 expecting_tls_get_addr = 2;
7666 break;
7667
7668 case R_PPC64_TPREL64:
7669 if (pass == 0
7670 || sec != toc
7671 || toc_ref == NULL
7672 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7673 continue;
7674 if (ok_tprel)
7675 {
7676 /* IE -> LE */
7677 tls_set = TLS_EXPLICIT;
7678 tls_clear = TLS_TPREL;
7679 break;
7680 }
7681 continue;
7682
7683 case R_PPC64_DTPMOD64:
7684 if (pass == 0
7685 || sec != toc
7686 || toc_ref == NULL
7687 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7688 continue;
7689 if (rel + 1 < relend
7690 && (rel[1].r_info
7691 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7692 && rel[1].r_offset == rel->r_offset + 8)
7693 {
7694 if (ok_tprel)
7695 /* GD -> LE */
7696 tls_set = TLS_EXPLICIT | TLS_GD;
7697 else
7698 /* GD -> IE */
7699 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7700 tls_clear = TLS_GD;
7701 }
7702 else
7703 {
7704 if (!is_local)
7705 continue;
7706
7707 /* LD -> LE */
7708 tls_set = TLS_EXPLICIT;
7709 tls_clear = TLS_LD;
7710 }
7711 break;
7712
7713 default:
7714 continue;
7715 }
7716
7717 if (pass == 0)
7718 {
7719 if (!expecting_tls_get_addr
7720 || !sec->has_tls_get_addr_call)
7721 continue;
7722
7723 if (rel + 1 < relend
7724 && branch_reloc_hash_match (ibfd, rel + 1,
7725 htab->tls_get_addr,
7726 htab->tls_get_addr_fd))
7727 {
7728 if (expecting_tls_get_addr == 2)
7729 {
7730 /* Check for toc tls entries. */
7731 unsigned char *toc_tls;
7732 int retval;
7733
7734 retval = get_tls_mask (&toc_tls, NULL, NULL,
7735 &locsyms,
7736 rel, ibfd);
7737 if (retval == 0)
7738 goto err_free_rel;
7739 if (toc_tls != NULL)
7740 {
7741 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
7742 found_tls_get_addr_arg = 1;
7743 if (retval > 1)
7744 toc_ref[toc_ref_index] = 1;
7745 }
7746 }
7747 continue;
7748 }
7749
7750 if (expecting_tls_get_addr != 1)
7751 continue;
7752
7753 /* Uh oh, we didn't find the expected call. We
7754 could just mark this symbol to exclude it
7755 from tls optimization but it's safer to skip
7756 the entire optimization. */
7757 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
7758 "TLS optimization disabled\n"),
7759 ibfd, sec, rel->r_offset);
7760 ret = TRUE;
7761 goto err_free_rel;
7762 }
7763
7764 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7765 {
7766 struct plt_entry *ent;
7767 for (ent = htab->tls_get_addr->elf.plt.plist;
7768 ent != NULL;
7769 ent = ent->next)
7770 if (ent->addend == 0)
7771 {
7772 if (ent->plt.refcount > 0)
7773 {
7774 ent->plt.refcount -= 1;
7775 expecting_tls_get_addr = 0;
7776 }
7777 break;
7778 }
7779 }
7780
7781 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7782 {
7783 struct plt_entry *ent;
7784 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7785 ent != NULL;
7786 ent = ent->next)
7787 if (ent->addend == 0)
7788 {
7789 if (ent->plt.refcount > 0)
7790 ent->plt.refcount -= 1;
7791 break;
7792 }
7793 }
7794
7795 if (tls_clear == 0)
7796 continue;
7797
7798 if ((tls_set & TLS_EXPLICIT) == 0)
7799 {
7800 struct got_entry *ent;
7801
7802 /* Adjust got entry for this reloc. */
7803 if (h != NULL)
7804 ent = h->got.glist;
7805 else
7806 ent = elf_local_got_ents (ibfd)[r_symndx];
7807
7808 for (; ent != NULL; ent = ent->next)
7809 if (ent->addend == rel->r_addend
7810 && ent->owner == ibfd
7811 && ent->tls_type == tls_type)
7812 break;
7813 if (ent == NULL)
7814 abort ();
7815
7816 if (tls_set == 0)
7817 {
7818 /* We managed to get rid of a got entry. */
7819 if (ent->got.refcount > 0)
7820 ent->got.refcount -= 1;
7821 }
7822 }
7823 else
7824 {
7825 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7826 we'll lose one or two dyn relocs. */
7827 if (!dec_dynrel_count (rel->r_info, sec, info,
7828 NULL, h, sym_sec))
7829 return FALSE;
7830
7831 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7832 {
7833 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7834 NULL, h, sym_sec))
7835 return FALSE;
7836 }
7837 }
7838
7839 *tls_mask |= tls_set;
7840 *tls_mask &= ~tls_clear;
7841 }
7842
7843 if (elf_section_data (sec)->relocs != relstart)
7844 free (relstart);
7845 }
7846
7847 if (locsyms != NULL
7848 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7849 {
7850 if (!info->keep_memory)
7851 free (locsyms);
7852 else
7853 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7854 }
7855 }
7856
7857 if (toc_ref != NULL)
7858 free (toc_ref);
7859 return TRUE;
7860 }
7861
7862 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7863 the values of any global symbols in a toc section that has been
7864 edited. Globals in toc sections should be a rarity, so this function
7865 sets a flag if any are found in toc sections other than the one just
7866 edited, so that futher hash table traversals can be avoided. */
7867
7868 struct adjust_toc_info
7869 {
7870 asection *toc;
7871 unsigned long *skip;
7872 bfd_boolean global_toc_syms;
7873 };
7874
7875 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7876
7877 static bfd_boolean
7878 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7879 {
7880 struct ppc_link_hash_entry *eh;
7881 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7882 unsigned long i;
7883
7884 if (h->root.type != bfd_link_hash_defined
7885 && h->root.type != bfd_link_hash_defweak)
7886 return TRUE;
7887
7888 eh = (struct ppc_link_hash_entry *) h;
7889 if (eh->adjust_done)
7890 return TRUE;
7891
7892 if (eh->elf.root.u.def.section == toc_inf->toc)
7893 {
7894 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7895 i = toc_inf->toc->rawsize >> 3;
7896 else
7897 i = eh->elf.root.u.def.value >> 3;
7898
7899 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7900 {
7901 (*_bfd_error_handler)
7902 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7903 do
7904 ++i;
7905 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7906 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7907 }
7908
7909 eh->elf.root.u.def.value -= toc_inf->skip[i];
7910 eh->adjust_done = 1;
7911 }
7912 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7913 toc_inf->global_toc_syms = TRUE;
7914
7915 return TRUE;
7916 }
7917
7918 /* Examine all relocs referencing .toc sections in order to remove
7919 unused .toc entries. */
7920
7921 bfd_boolean
7922 ppc64_elf_edit_toc (struct bfd_link_info *info)
7923 {
7924 bfd *ibfd;
7925 struct adjust_toc_info toc_inf;
7926 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7927
7928 htab->do_toc_opt = 1;
7929 toc_inf.global_toc_syms = TRUE;
7930 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7931 {
7932 asection *toc, *sec;
7933 Elf_Internal_Shdr *symtab_hdr;
7934 Elf_Internal_Sym *local_syms;
7935 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
7936 unsigned long *skip, *drop;
7937 unsigned char *used;
7938 unsigned char *keep, last, some_unused;
7939
7940 if (!is_ppc64_elf (ibfd))
7941 continue;
7942
7943 toc = bfd_get_section_by_name (ibfd, ".toc");
7944 if (toc == NULL
7945 || toc->size == 0
7946 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7947 || elf_discarded_section (toc))
7948 continue;
7949
7950 toc_relocs = NULL;
7951 local_syms = NULL;
7952 symtab_hdr = &elf_symtab_hdr (ibfd);
7953
7954 /* Look at sections dropped from the final link. */
7955 skip = NULL;
7956 relstart = NULL;
7957 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7958 {
7959 if (sec->reloc_count == 0
7960 || !elf_discarded_section (sec)
7961 || get_opd_info (sec)
7962 || (sec->flags & SEC_ALLOC) == 0
7963 || (sec->flags & SEC_DEBUGGING) != 0)
7964 continue;
7965
7966 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7967 if (relstart == NULL)
7968 goto error_ret;
7969
7970 /* Run through the relocs to see which toc entries might be
7971 unused. */
7972 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7973 {
7974 enum elf_ppc64_reloc_type r_type;
7975 unsigned long r_symndx;
7976 asection *sym_sec;
7977 struct elf_link_hash_entry *h;
7978 Elf_Internal_Sym *sym;
7979 bfd_vma val;
7980
7981 r_type = ELF64_R_TYPE (rel->r_info);
7982 switch (r_type)
7983 {
7984 default:
7985 continue;
7986
7987 case R_PPC64_TOC16:
7988 case R_PPC64_TOC16_LO:
7989 case R_PPC64_TOC16_HI:
7990 case R_PPC64_TOC16_HA:
7991 case R_PPC64_TOC16_DS:
7992 case R_PPC64_TOC16_LO_DS:
7993 break;
7994 }
7995
7996 r_symndx = ELF64_R_SYM (rel->r_info);
7997 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7998 r_symndx, ibfd))
7999 goto error_ret;
8000
8001 if (sym_sec != toc)
8002 continue;
8003
8004 if (h != NULL)
8005 val = h->root.u.def.value;
8006 else
8007 val = sym->st_value;
8008 val += rel->r_addend;
8009
8010 if (val >= toc->size)
8011 continue;
8012
8013 /* Anything in the toc ought to be aligned to 8 bytes.
8014 If not, don't mark as unused. */
8015 if (val & 7)
8016 continue;
8017
8018 if (skip == NULL)
8019 {
8020 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8021 if (skip == NULL)
8022 goto error_ret;
8023 }
8024
8025 skip[val >> 3] = ref_from_discarded;
8026 }
8027
8028 if (elf_section_data (sec)->relocs != relstart)
8029 free (relstart);
8030 }
8031
8032 /* For largetoc loads of address constants, we can convert
8033 . addis rx,2,addr@got@ha
8034 . ld ry,addr@got@l(rx)
8035 to
8036 . addis rx,2,addr@toc@ha
8037 . addi ry,rx,addr@toc@l
8038 when addr is within 2G of the toc pointer. This then means
8039 that the word storing "addr" in the toc is no longer needed. */
8040
8041 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8042 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8043 && toc->reloc_count != 0)
8044 {
8045 /* Read toc relocs. */
8046 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8047 info->keep_memory);
8048 if (toc_relocs == NULL)
8049 goto error_ret;
8050
8051 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8052 {
8053 enum elf_ppc64_reloc_type r_type;
8054 unsigned long r_symndx;
8055 asection *sym_sec;
8056 struct elf_link_hash_entry *h;
8057 Elf_Internal_Sym *sym;
8058 bfd_vma val, addr;
8059
8060 r_type = ELF64_R_TYPE (rel->r_info);
8061 if (r_type != R_PPC64_ADDR64)
8062 continue;
8063
8064 r_symndx = ELF64_R_SYM (rel->r_info);
8065 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8066 r_symndx, ibfd))
8067 goto error_ret;
8068
8069 if (sym_sec == NULL
8070 || elf_discarded_section (sym_sec))
8071 continue;
8072
8073 if (!SYMBOL_CALLS_LOCAL (info, h))
8074 continue;
8075
8076 if (h != NULL)
8077 {
8078 if (h->type == STT_GNU_IFUNC)
8079 continue;
8080 val = h->root.u.def.value;
8081 }
8082 else
8083 {
8084 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8085 continue;
8086 val = sym->st_value;
8087 }
8088 val += rel->r_addend;
8089 val += sym_sec->output_section->vma + sym_sec->output_offset;
8090
8091 /* We don't yet know the exact toc pointer value, but we
8092 know it will be somewhere in the toc section. Don't
8093 optimize if the difference from any possible toc
8094 pointer is outside [ff..f80008000, 7fff7fff]. */
8095 addr = toc->output_section->vma + TOC_BASE_OFF;
8096 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8097 continue;
8098
8099 addr = toc->output_section->vma + toc->output_section->rawsize;
8100 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8101 continue;
8102
8103 if (skip == NULL)
8104 {
8105 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8106 if (skip == NULL)
8107 goto error_ret;
8108 }
8109
8110 skip[rel->r_offset >> 3]
8111 |= can_optimize | ((rel - toc_relocs) << 2);
8112 }
8113 }
8114
8115 if (skip == NULL)
8116 continue;
8117
8118 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8119 if (used == NULL)
8120 {
8121 error_ret:
8122 if (local_syms != NULL
8123 && symtab_hdr->contents != (unsigned char *) local_syms)
8124 free (local_syms);
8125 if (sec != NULL
8126 && relstart != NULL
8127 && elf_section_data (sec)->relocs != relstart)
8128 free (relstart);
8129 if (toc_relocs != NULL
8130 && elf_section_data (toc)->relocs != toc_relocs)
8131 free (toc_relocs);
8132 if (skip != NULL)
8133 free (skip);
8134 return FALSE;
8135 }
8136
8137 /* Now check all kept sections that might reference the toc.
8138 Check the toc itself last. */
8139 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8140 : ibfd->sections);
8141 sec != NULL;
8142 sec = (sec == toc ? NULL
8143 : sec->next == NULL ? toc
8144 : sec->next == toc && toc->next ? toc->next
8145 : sec->next))
8146 {
8147 int repeat;
8148
8149 if (sec->reloc_count == 0
8150 || elf_discarded_section (sec)
8151 || get_opd_info (sec)
8152 || (sec->flags & SEC_ALLOC) == 0
8153 || (sec->flags & SEC_DEBUGGING) != 0)
8154 continue;
8155
8156 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8157 info->keep_memory);
8158 if (relstart == NULL)
8159 goto error_ret;
8160
8161 /* Mark toc entries referenced as used. */
8162 repeat = 0;
8163 do
8164 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8165 {
8166 enum elf_ppc64_reloc_type r_type;
8167 unsigned long r_symndx;
8168 asection *sym_sec;
8169 struct elf_link_hash_entry *h;
8170 Elf_Internal_Sym *sym;
8171 bfd_vma val;
8172
8173 r_type = ELF64_R_TYPE (rel->r_info);
8174 switch (r_type)
8175 {
8176 case R_PPC64_TOC16:
8177 case R_PPC64_TOC16_LO:
8178 case R_PPC64_TOC16_HI:
8179 case R_PPC64_TOC16_HA:
8180 case R_PPC64_TOC16_DS:
8181 case R_PPC64_TOC16_LO_DS:
8182 /* In case we're taking addresses of toc entries. */
8183 case R_PPC64_ADDR64:
8184 break;
8185
8186 default:
8187 continue;
8188 }
8189
8190 r_symndx = ELF64_R_SYM (rel->r_info);
8191 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8192 r_symndx, ibfd))
8193 {
8194 free (used);
8195 goto error_ret;
8196 }
8197
8198 if (sym_sec != toc)
8199 continue;
8200
8201 if (h != NULL)
8202 val = h->root.u.def.value;
8203 else
8204 val = sym->st_value;
8205 val += rel->r_addend;
8206
8207 if (val >= toc->size)
8208 continue;
8209
8210 if ((skip[val >> 3] & can_optimize) != 0)
8211 {
8212 bfd_vma off;
8213 unsigned char opc;
8214
8215 switch (r_type)
8216 {
8217 case R_PPC64_TOC16_HA:
8218 break;
8219
8220 case R_PPC64_TOC16_LO_DS:
8221 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8222 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8223 return FALSE;
8224 if ((opc & (0x3f << 2)) == (58u << 2))
8225 break;
8226 /* Fall thru */
8227
8228 default:
8229 /* Wrong sort of reloc, or not a ld. We may
8230 as well clear ref_from_discarded too. */
8231 skip[val >> 3] = 0;
8232 }
8233 }
8234
8235 /* For the toc section, we only mark as used if
8236 this entry itself isn't unused. */
8237 if (sec == toc
8238 && !used[val >> 3]
8239 && (used[rel->r_offset >> 3]
8240 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8241 /* Do all the relocs again, to catch reference
8242 chains. */
8243 repeat = 1;
8244
8245 used[val >> 3] = 1;
8246 }
8247 while (repeat);
8248
8249 if (elf_section_data (sec)->relocs != relstart)
8250 free (relstart);
8251 }
8252
8253 /* Merge the used and skip arrays. Assume that TOC
8254 doublewords not appearing as either used or unused belong
8255 to to an entry more than one doubleword in size. */
8256 for (drop = skip, keep = used, last = 0, some_unused = 0;
8257 drop < skip + (toc->size + 7) / 8;
8258 ++drop, ++keep)
8259 {
8260 if (*keep)
8261 {
8262 *drop &= ~ref_from_discarded;
8263 if ((*drop & can_optimize) != 0)
8264 some_unused = 1;
8265 last = 0;
8266 }
8267 else if ((*drop & ref_from_discarded) != 0)
8268 {
8269 some_unused = 1;
8270 last = ref_from_discarded;
8271 }
8272 else
8273 *drop = last;
8274 }
8275
8276 free (used);
8277
8278 if (some_unused)
8279 {
8280 bfd_byte *contents, *src;
8281 unsigned long off;
8282 Elf_Internal_Sym *sym;
8283 bfd_boolean local_toc_syms = FALSE;
8284
8285 /* Shuffle the toc contents, and at the same time convert the
8286 skip array from booleans into offsets. */
8287 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8288 goto error_ret;
8289
8290 elf_section_data (toc)->this_hdr.contents = contents;
8291
8292 for (src = contents, off = 0, drop = skip;
8293 src < contents + toc->size;
8294 src += 8, ++drop)
8295 {
8296 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8297 off += 8;
8298 else if (off != 0)
8299 {
8300 *drop = off;
8301 memcpy (src - off, src, 8);
8302 }
8303 }
8304 *drop = off;
8305 toc->rawsize = toc->size;
8306 toc->size = src - contents - off;
8307
8308 /* Adjust addends for relocs against the toc section sym,
8309 and optimize any accesses we can. */
8310 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8311 {
8312 if (sec->reloc_count == 0
8313 || elf_discarded_section (sec))
8314 continue;
8315
8316 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8317 info->keep_memory);
8318 if (relstart == NULL)
8319 goto error_ret;
8320
8321 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8322 {
8323 enum elf_ppc64_reloc_type r_type;
8324 unsigned long r_symndx;
8325 asection *sym_sec;
8326 struct elf_link_hash_entry *h;
8327 bfd_vma val;
8328
8329 r_type = ELF64_R_TYPE (rel->r_info);
8330 switch (r_type)
8331 {
8332 default:
8333 continue;
8334
8335 case R_PPC64_TOC16:
8336 case R_PPC64_TOC16_LO:
8337 case R_PPC64_TOC16_HI:
8338 case R_PPC64_TOC16_HA:
8339 case R_PPC64_TOC16_DS:
8340 case R_PPC64_TOC16_LO_DS:
8341 case R_PPC64_ADDR64:
8342 break;
8343 }
8344
8345 r_symndx = ELF64_R_SYM (rel->r_info);
8346 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8347 r_symndx, ibfd))
8348 goto error_ret;
8349
8350 if (sym_sec != toc)
8351 continue;
8352
8353 if (h != NULL)
8354 val = h->root.u.def.value;
8355 else
8356 {
8357 val = sym->st_value;
8358 if (val != 0)
8359 local_toc_syms = TRUE;
8360 }
8361
8362 val += rel->r_addend;
8363
8364 if (val > toc->rawsize)
8365 val = toc->rawsize;
8366 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8367 continue;
8368 else if ((skip[val >> 3] & can_optimize) != 0)
8369 {
8370 Elf_Internal_Rela *tocrel
8371 = toc_relocs + (skip[val >> 3] >> 2);
8372 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8373
8374 switch (r_type)
8375 {
8376 case R_PPC64_TOC16_HA:
8377 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8378 break;
8379
8380 case R_PPC64_TOC16_LO_DS:
8381 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8382 break;
8383
8384 default:
8385 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8386 ppc_howto_init ();
8387 info->callbacks->einfo
8388 (_("%P: %H: %s relocation references "
8389 "optimized away TOC entry\n"),
8390 ibfd, sec, rel->r_offset,
8391 ppc64_elf_howto_table[r_type]->name);
8392 bfd_set_error (bfd_error_bad_value);
8393 goto error_ret;
8394 }
8395 rel->r_addend = tocrel->r_addend;
8396 elf_section_data (sec)->relocs = relstart;
8397 continue;
8398 }
8399
8400 if (h != NULL || sym->st_value != 0)
8401 continue;
8402
8403 rel->r_addend -= skip[val >> 3];
8404 elf_section_data (sec)->relocs = relstart;
8405 }
8406
8407 if (elf_section_data (sec)->relocs != relstart)
8408 free (relstart);
8409 }
8410
8411 /* We shouldn't have local or global symbols defined in the TOC,
8412 but handle them anyway. */
8413 if (local_syms != NULL)
8414 for (sym = local_syms;
8415 sym < local_syms + symtab_hdr->sh_info;
8416 ++sym)
8417 if (sym->st_value != 0
8418 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8419 {
8420 unsigned long i;
8421
8422 if (sym->st_value > toc->rawsize)
8423 i = toc->rawsize >> 3;
8424 else
8425 i = sym->st_value >> 3;
8426
8427 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8428 {
8429 if (local_toc_syms)
8430 (*_bfd_error_handler)
8431 (_("%s defined on removed toc entry"),
8432 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8433 do
8434 ++i;
8435 while ((skip[i] & (ref_from_discarded | can_optimize)));
8436 sym->st_value = (bfd_vma) i << 3;
8437 }
8438
8439 sym->st_value -= skip[i];
8440 symtab_hdr->contents = (unsigned char *) local_syms;
8441 }
8442
8443 /* Adjust any global syms defined in this toc input section. */
8444 if (toc_inf.global_toc_syms)
8445 {
8446 toc_inf.toc = toc;
8447 toc_inf.skip = skip;
8448 toc_inf.global_toc_syms = FALSE;
8449 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8450 &toc_inf);
8451 }
8452
8453 if (toc->reloc_count != 0)
8454 {
8455 Elf_Internal_Shdr *rel_hdr;
8456 Elf_Internal_Rela *wrel;
8457 bfd_size_type sz;
8458
8459 /* Remove unused toc relocs, and adjust those we keep. */
8460 if (toc_relocs == NULL)
8461 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8462 info->keep_memory);
8463 if (toc_relocs == NULL)
8464 goto error_ret;
8465
8466 wrel = toc_relocs;
8467 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8468 if ((skip[rel->r_offset >> 3]
8469 & (ref_from_discarded | can_optimize)) == 0)
8470 {
8471 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8472 wrel->r_info = rel->r_info;
8473 wrel->r_addend = rel->r_addend;
8474 ++wrel;
8475 }
8476 else if (!dec_dynrel_count (rel->r_info, toc, info,
8477 &local_syms, NULL, NULL))
8478 goto error_ret;
8479
8480 elf_section_data (toc)->relocs = toc_relocs;
8481 toc->reloc_count = wrel - toc_relocs;
8482 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8483 sz = rel_hdr->sh_entsize;
8484 rel_hdr->sh_size = toc->reloc_count * sz;
8485 }
8486 }
8487 else if (toc_relocs != NULL
8488 && elf_section_data (toc)->relocs != toc_relocs)
8489 free (toc_relocs);
8490
8491 if (local_syms != NULL
8492 && symtab_hdr->contents != (unsigned char *) local_syms)
8493 {
8494 if (!info->keep_memory)
8495 free (local_syms);
8496 else
8497 symtab_hdr->contents = (unsigned char *) local_syms;
8498 }
8499 free (skip);
8500 }
8501
8502 return TRUE;
8503 }
8504
8505 /* Return true iff input section I references the TOC using
8506 instructions limited to +/-32k offsets. */
8507
8508 bfd_boolean
8509 ppc64_elf_has_small_toc_reloc (asection *i)
8510 {
8511 return (is_ppc64_elf (i->owner)
8512 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8513 }
8514
8515 /* Allocate space for one GOT entry. */
8516
8517 static void
8518 allocate_got (struct elf_link_hash_entry *h,
8519 struct bfd_link_info *info,
8520 struct got_entry *gent)
8521 {
8522 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8523 bfd_boolean dyn;
8524 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8525 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8526 ? 16 : 8);
8527 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8528 ? 2 : 1) * sizeof (Elf64_External_Rela);
8529 asection *got = ppc64_elf_tdata (gent->owner)->got;
8530
8531 gent->got.offset = got->size;
8532 got->size += entsize;
8533
8534 dyn = htab->elf.dynamic_sections_created;
8535 if ((info->shared
8536 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8537 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8538 || h->root.type != bfd_link_hash_undefweak))
8539 {
8540 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8541 relgot->size += rentsize;
8542 }
8543 else if (h->type == STT_GNU_IFUNC)
8544 {
8545 asection *relgot = htab->reliplt;
8546 relgot->size += rentsize;
8547 htab->got_reli_size += rentsize;
8548 }
8549 }
8550
8551 /* This function merges got entries in the same toc group. */
8552
8553 static void
8554 merge_got_entries (struct got_entry **pent)
8555 {
8556 struct got_entry *ent, *ent2;
8557
8558 for (ent = *pent; ent != NULL; ent = ent->next)
8559 if (!ent->is_indirect)
8560 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8561 if (!ent2->is_indirect
8562 && ent2->addend == ent->addend
8563 && ent2->tls_type == ent->tls_type
8564 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8565 {
8566 ent2->is_indirect = TRUE;
8567 ent2->got.ent = ent;
8568 }
8569 }
8570
8571 /* Allocate space in .plt, .got and associated reloc sections for
8572 dynamic relocs. */
8573
8574 static bfd_boolean
8575 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8576 {
8577 struct bfd_link_info *info;
8578 struct ppc_link_hash_table *htab;
8579 asection *s;
8580 struct ppc_link_hash_entry *eh;
8581 struct elf_dyn_relocs *p;
8582 struct got_entry **pgent, *gent;
8583
8584 if (h->root.type == bfd_link_hash_indirect)
8585 return TRUE;
8586
8587 info = (struct bfd_link_info *) inf;
8588 htab = ppc_hash_table (info);
8589 if (htab == NULL)
8590 return FALSE;
8591
8592 if ((htab->elf.dynamic_sections_created
8593 && h->dynindx != -1
8594 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8595 || h->type == STT_GNU_IFUNC)
8596 {
8597 struct plt_entry *pent;
8598 bfd_boolean doneone = FALSE;
8599 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8600 if (pent->plt.refcount > 0)
8601 {
8602 if (!htab->elf.dynamic_sections_created
8603 || h->dynindx == -1)
8604 {
8605 s = htab->iplt;
8606 pent->plt.offset = s->size;
8607 s->size += PLT_ENTRY_SIZE;
8608 s = htab->reliplt;
8609 }
8610 else
8611 {
8612 /* If this is the first .plt entry, make room for the special
8613 first entry. */
8614 s = htab->plt;
8615 if (s->size == 0)
8616 s->size += PLT_INITIAL_ENTRY_SIZE;
8617
8618 pent->plt.offset = s->size;
8619
8620 /* Make room for this entry. */
8621 s->size += PLT_ENTRY_SIZE;
8622
8623 /* Make room for the .glink code. */
8624 s = htab->glink;
8625 if (s->size == 0)
8626 s->size += GLINK_CALL_STUB_SIZE;
8627 /* We need bigger stubs past index 32767. */
8628 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8629 s->size += 4;
8630 s->size += 2*4;
8631
8632 /* We also need to make an entry in the .rela.plt section. */
8633 s = htab->relplt;
8634 }
8635 s->size += sizeof (Elf64_External_Rela);
8636 doneone = TRUE;
8637 }
8638 else
8639 pent->plt.offset = (bfd_vma) -1;
8640 if (!doneone)
8641 {
8642 h->plt.plist = NULL;
8643 h->needs_plt = 0;
8644 }
8645 }
8646 else
8647 {
8648 h->plt.plist = NULL;
8649 h->needs_plt = 0;
8650 }
8651
8652 eh = (struct ppc_link_hash_entry *) h;
8653 /* Run through the TLS GD got entries first if we're changing them
8654 to TPREL. */
8655 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8656 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8657 if (gent->got.refcount > 0
8658 && (gent->tls_type & TLS_GD) != 0)
8659 {
8660 /* This was a GD entry that has been converted to TPREL. If
8661 there happens to be a TPREL entry we can use that one. */
8662 struct got_entry *ent;
8663 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8664 if (ent->got.refcount > 0
8665 && (ent->tls_type & TLS_TPREL) != 0
8666 && ent->addend == gent->addend
8667 && ent->owner == gent->owner)
8668 {
8669 gent->got.refcount = 0;
8670 break;
8671 }
8672
8673 /* If not, then we'll be using our own TPREL entry. */
8674 if (gent->got.refcount != 0)
8675 gent->tls_type = TLS_TLS | TLS_TPREL;
8676 }
8677
8678 /* Remove any list entry that won't generate a word in the GOT before
8679 we call merge_got_entries. Otherwise we risk merging to empty
8680 entries. */
8681 pgent = &h->got.glist;
8682 while ((gent = *pgent) != NULL)
8683 if (gent->got.refcount > 0)
8684 {
8685 if ((gent->tls_type & TLS_LD) != 0
8686 && !h->def_dynamic)
8687 {
8688 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8689 *pgent = gent->next;
8690 }
8691 else
8692 pgent = &gent->next;
8693 }
8694 else
8695 *pgent = gent->next;
8696
8697 if (!htab->do_multi_toc)
8698 merge_got_entries (&h->got.glist);
8699
8700 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8701 if (!gent->is_indirect)
8702 {
8703 /* Make sure this symbol is output as a dynamic symbol.
8704 Undefined weak syms won't yet be marked as dynamic,
8705 nor will all TLS symbols. */
8706 if (h->dynindx == -1
8707 && !h->forced_local
8708 && h->type != STT_GNU_IFUNC
8709 && htab->elf.dynamic_sections_created)
8710 {
8711 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8712 return FALSE;
8713 }
8714
8715 if (!is_ppc64_elf (gent->owner))
8716 abort ();
8717
8718 allocate_got (h, info, gent);
8719 }
8720
8721 if (eh->dyn_relocs == NULL
8722 || (!htab->elf.dynamic_sections_created
8723 && h->type != STT_GNU_IFUNC))
8724 return TRUE;
8725
8726 /* In the shared -Bsymbolic case, discard space allocated for
8727 dynamic pc-relative relocs against symbols which turn out to be
8728 defined in regular objects. For the normal shared case, discard
8729 space for relocs that have become local due to symbol visibility
8730 changes. */
8731
8732 if (info->shared)
8733 {
8734 /* Relocs that use pc_count are those that appear on a call insn,
8735 or certain REL relocs (see must_be_dyn_reloc) that can be
8736 generated via assembly. We want calls to protected symbols to
8737 resolve directly to the function rather than going via the plt.
8738 If people want function pointer comparisons to work as expected
8739 then they should avoid writing weird assembly. */
8740 if (SYMBOL_CALLS_LOCAL (info, h))
8741 {
8742 struct elf_dyn_relocs **pp;
8743
8744 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8745 {
8746 p->count -= p->pc_count;
8747 p->pc_count = 0;
8748 if (p->count == 0)
8749 *pp = p->next;
8750 else
8751 pp = &p->next;
8752 }
8753 }
8754
8755 /* Also discard relocs on undefined weak syms with non-default
8756 visibility. */
8757 if (eh->dyn_relocs != NULL
8758 && h->root.type == bfd_link_hash_undefweak)
8759 {
8760 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8761 eh->dyn_relocs = NULL;
8762
8763 /* Make sure this symbol is output as a dynamic symbol.
8764 Undefined weak syms won't yet be marked as dynamic. */
8765 else if (h->dynindx == -1
8766 && !h->forced_local)
8767 {
8768 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8769 return FALSE;
8770 }
8771 }
8772 }
8773 else if (h->type == STT_GNU_IFUNC)
8774 {
8775 if (!h->non_got_ref)
8776 eh->dyn_relocs = NULL;
8777 }
8778 else if (ELIMINATE_COPY_RELOCS)
8779 {
8780 /* For the non-shared case, discard space for relocs against
8781 symbols which turn out to need copy relocs or are not
8782 dynamic. */
8783
8784 if (!h->non_got_ref
8785 && !h->def_regular)
8786 {
8787 /* Make sure this symbol is output as a dynamic symbol.
8788 Undefined weak syms won't yet be marked as dynamic. */
8789 if (h->dynindx == -1
8790 && !h->forced_local)
8791 {
8792 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8793 return FALSE;
8794 }
8795
8796 /* If that succeeded, we know we'll be keeping all the
8797 relocs. */
8798 if (h->dynindx != -1)
8799 goto keep;
8800 }
8801
8802 eh->dyn_relocs = NULL;
8803
8804 keep: ;
8805 }
8806
8807 /* Finally, allocate space. */
8808 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8809 {
8810 asection *sreloc = elf_section_data (p->sec)->sreloc;
8811 if (!htab->elf.dynamic_sections_created)
8812 sreloc = htab->reliplt;
8813 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8814 }
8815
8816 return TRUE;
8817 }
8818
8819 /* Find any dynamic relocs that apply to read-only sections. */
8820
8821 static bfd_boolean
8822 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8823 {
8824 struct ppc_link_hash_entry *eh;
8825 struct elf_dyn_relocs *p;
8826
8827 eh = (struct ppc_link_hash_entry *) h;
8828 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8829 {
8830 asection *s = p->sec->output_section;
8831
8832 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8833 {
8834 struct bfd_link_info *info = inf;
8835
8836 info->flags |= DF_TEXTREL;
8837
8838 /* Not an error, just cut short the traversal. */
8839 return FALSE;
8840 }
8841 }
8842 return TRUE;
8843 }
8844
8845 /* Set the sizes of the dynamic sections. */
8846
8847 static bfd_boolean
8848 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8849 struct bfd_link_info *info)
8850 {
8851 struct ppc_link_hash_table *htab;
8852 bfd *dynobj;
8853 asection *s;
8854 bfd_boolean relocs;
8855 bfd *ibfd;
8856 struct got_entry *first_tlsld;
8857
8858 htab = ppc_hash_table (info);
8859 if (htab == NULL)
8860 return FALSE;
8861
8862 dynobj = htab->elf.dynobj;
8863 if (dynobj == NULL)
8864 abort ();
8865
8866 if (htab->elf.dynamic_sections_created)
8867 {
8868 /* Set the contents of the .interp section to the interpreter. */
8869 if (info->executable)
8870 {
8871 s = bfd_get_section_by_name (dynobj, ".interp");
8872 if (s == NULL)
8873 abort ();
8874 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8875 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8876 }
8877 }
8878
8879 /* Set up .got offsets for local syms, and space for local dynamic
8880 relocs. */
8881 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8882 {
8883 struct got_entry **lgot_ents;
8884 struct got_entry **end_lgot_ents;
8885 struct plt_entry **local_plt;
8886 struct plt_entry **end_local_plt;
8887 unsigned char *lgot_masks;
8888 bfd_size_type locsymcount;
8889 Elf_Internal_Shdr *symtab_hdr;
8890 asection *srel;
8891
8892 if (!is_ppc64_elf (ibfd))
8893 continue;
8894
8895 for (s = ibfd->sections; s != NULL; s = s->next)
8896 {
8897 struct elf_dyn_relocs *p;
8898
8899 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8900 {
8901 if (!bfd_is_abs_section (p->sec)
8902 && bfd_is_abs_section (p->sec->output_section))
8903 {
8904 /* Input section has been discarded, either because
8905 it is a copy of a linkonce section or due to
8906 linker script /DISCARD/, so we'll be discarding
8907 the relocs too. */
8908 }
8909 else if (p->count != 0)
8910 {
8911 srel = elf_section_data (p->sec)->sreloc;
8912 if (!htab->elf.dynamic_sections_created)
8913 srel = htab->reliplt;
8914 srel->size += p->count * sizeof (Elf64_External_Rela);
8915 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8916 info->flags |= DF_TEXTREL;
8917 }
8918 }
8919 }
8920
8921 lgot_ents = elf_local_got_ents (ibfd);
8922 if (!lgot_ents)
8923 continue;
8924
8925 symtab_hdr = &elf_symtab_hdr (ibfd);
8926 locsymcount = symtab_hdr->sh_info;
8927 end_lgot_ents = lgot_ents + locsymcount;
8928 local_plt = (struct plt_entry **) end_lgot_ents;
8929 end_local_plt = local_plt + locsymcount;
8930 lgot_masks = (unsigned char *) end_local_plt;
8931 s = ppc64_elf_tdata (ibfd)->got;
8932 srel = ppc64_elf_tdata (ibfd)->relgot;
8933 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8934 {
8935 struct got_entry **pent, *ent;
8936
8937 pent = lgot_ents;
8938 while ((ent = *pent) != NULL)
8939 if (ent->got.refcount > 0)
8940 {
8941 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8942 {
8943 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8944 *pent = ent->next;
8945 }
8946 else
8947 {
8948 unsigned int num = 1;
8949 ent->got.offset = s->size;
8950 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8951 num = 2;
8952 s->size += num * 8;
8953 if (info->shared)
8954 srel->size += num * sizeof (Elf64_External_Rela);
8955 else if ((*lgot_masks & PLT_IFUNC) != 0)
8956 {
8957 htab->reliplt->size
8958 += num * sizeof (Elf64_External_Rela);
8959 htab->got_reli_size
8960 += num * sizeof (Elf64_External_Rela);
8961 }
8962 pent = &ent->next;
8963 }
8964 }
8965 else
8966 *pent = ent->next;
8967 }
8968
8969 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8970 for (; local_plt < end_local_plt; ++local_plt)
8971 {
8972 struct plt_entry *ent;
8973
8974 for (ent = *local_plt; ent != NULL; ent = ent->next)
8975 if (ent->plt.refcount > 0)
8976 {
8977 s = htab->iplt;
8978 ent->plt.offset = s->size;
8979 s->size += PLT_ENTRY_SIZE;
8980
8981 htab->reliplt->size += sizeof (Elf64_External_Rela);
8982 }
8983 else
8984 ent->plt.offset = (bfd_vma) -1;
8985 }
8986 }
8987
8988 /* Allocate global sym .plt and .got entries, and space for global
8989 sym dynamic relocs. */
8990 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8991
8992 first_tlsld = NULL;
8993 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8994 {
8995 struct got_entry *ent;
8996
8997 if (!is_ppc64_elf (ibfd))
8998 continue;
8999
9000 ent = ppc64_tlsld_got (ibfd);
9001 if (ent->got.refcount > 0)
9002 {
9003 if (!htab->do_multi_toc && first_tlsld != NULL)
9004 {
9005 ent->is_indirect = TRUE;
9006 ent->got.ent = first_tlsld;
9007 }
9008 else
9009 {
9010 if (first_tlsld == NULL)
9011 first_tlsld = ent;
9012 s = ppc64_elf_tdata (ibfd)->got;
9013 ent->got.offset = s->size;
9014 ent->owner = ibfd;
9015 s->size += 16;
9016 if (info->shared)
9017 {
9018 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9019 srel->size += sizeof (Elf64_External_Rela);
9020 }
9021 }
9022 }
9023 else
9024 ent->got.offset = (bfd_vma) -1;
9025 }
9026
9027 /* We now have determined the sizes of the various dynamic sections.
9028 Allocate memory for them. */
9029 relocs = FALSE;
9030 for (s = dynobj->sections; s != NULL; s = s->next)
9031 {
9032 if ((s->flags & SEC_LINKER_CREATED) == 0)
9033 continue;
9034
9035 if (s == htab->brlt || s == htab->relbrlt)
9036 /* These haven't been allocated yet; don't strip. */
9037 continue;
9038 else if (s == htab->got
9039 || s == htab->plt
9040 || s == htab->iplt
9041 || s == htab->glink
9042 || s == htab->dynbss)
9043 {
9044 /* Strip this section if we don't need it; see the
9045 comment below. */
9046 }
9047 else if (s == htab->glink_eh_frame)
9048 {
9049 if (!bfd_is_abs_section (s->output_section))
9050 /* Not sized yet. */
9051 continue;
9052 }
9053 else if (CONST_STRNEQ (s->name, ".rela"))
9054 {
9055 if (s->size != 0)
9056 {
9057 if (s != htab->relplt)
9058 relocs = TRUE;
9059
9060 /* We use the reloc_count field as a counter if we need
9061 to copy relocs into the output file. */
9062 s->reloc_count = 0;
9063 }
9064 }
9065 else
9066 {
9067 /* It's not one of our sections, so don't allocate space. */
9068 continue;
9069 }
9070
9071 if (s->size == 0)
9072 {
9073 /* If we don't need this section, strip it from the
9074 output file. This is mostly to handle .rela.bss and
9075 .rela.plt. We must create both sections in
9076 create_dynamic_sections, because they must be created
9077 before the linker maps input sections to output
9078 sections. The linker does that before
9079 adjust_dynamic_symbol is called, and it is that
9080 function which decides whether anything needs to go
9081 into these sections. */
9082 s->flags |= SEC_EXCLUDE;
9083 continue;
9084 }
9085
9086 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9087 continue;
9088
9089 /* Allocate memory for the section contents. We use bfd_zalloc
9090 here in case unused entries are not reclaimed before the
9091 section's contents are written out. This should not happen,
9092 but this way if it does we get a R_PPC64_NONE reloc in .rela
9093 sections instead of garbage.
9094 We also rely on the section contents being zero when writing
9095 the GOT. */
9096 s->contents = bfd_zalloc (dynobj, s->size);
9097 if (s->contents == NULL)
9098 return FALSE;
9099 }
9100
9101 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9102 {
9103 if (!is_ppc64_elf (ibfd))
9104 continue;
9105
9106 s = ppc64_elf_tdata (ibfd)->got;
9107 if (s != NULL && s != htab->got)
9108 {
9109 if (s->size == 0)
9110 s->flags |= SEC_EXCLUDE;
9111 else
9112 {
9113 s->contents = bfd_zalloc (ibfd, s->size);
9114 if (s->contents == NULL)
9115 return FALSE;
9116 }
9117 }
9118 s = ppc64_elf_tdata (ibfd)->relgot;
9119 if (s != NULL)
9120 {
9121 if (s->size == 0)
9122 s->flags |= SEC_EXCLUDE;
9123 else
9124 {
9125 s->contents = bfd_zalloc (ibfd, s->size);
9126 if (s->contents == NULL)
9127 return FALSE;
9128 relocs = TRUE;
9129 s->reloc_count = 0;
9130 }
9131 }
9132 }
9133
9134 if (htab->elf.dynamic_sections_created)
9135 {
9136 /* Add some entries to the .dynamic section. We fill in the
9137 values later, in ppc64_elf_finish_dynamic_sections, but we
9138 must add the entries now so that we get the correct size for
9139 the .dynamic section. The DT_DEBUG entry is filled in by the
9140 dynamic linker and used by the debugger. */
9141 #define add_dynamic_entry(TAG, VAL) \
9142 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9143
9144 if (info->executable)
9145 {
9146 if (!add_dynamic_entry (DT_DEBUG, 0))
9147 return FALSE;
9148 }
9149
9150 if (htab->plt != NULL && htab->plt->size != 0)
9151 {
9152 if (!add_dynamic_entry (DT_PLTGOT, 0)
9153 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9154 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9155 || !add_dynamic_entry (DT_JMPREL, 0)
9156 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9157 return FALSE;
9158 }
9159
9160 if (NO_OPD_RELOCS)
9161 {
9162 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9163 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9164 return FALSE;
9165 }
9166
9167 if (!htab->no_tls_get_addr_opt
9168 && htab->tls_get_addr_fd != NULL
9169 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9170 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9171 return FALSE;
9172
9173 if (relocs)
9174 {
9175 if (!add_dynamic_entry (DT_RELA, 0)
9176 || !add_dynamic_entry (DT_RELASZ, 0)
9177 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9178 return FALSE;
9179
9180 /* If any dynamic relocs apply to a read-only section,
9181 then we need a DT_TEXTREL entry. */
9182 if ((info->flags & DF_TEXTREL) == 0)
9183 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9184
9185 if ((info->flags & DF_TEXTREL) != 0)
9186 {
9187 if (!add_dynamic_entry (DT_TEXTREL, 0))
9188 return FALSE;
9189 }
9190 }
9191 }
9192 #undef add_dynamic_entry
9193
9194 return TRUE;
9195 }
9196
9197 /* Determine the type of stub needed, if any, for a call. */
9198
9199 static inline enum ppc_stub_type
9200 ppc_type_of_stub (asection *input_sec,
9201 const Elf_Internal_Rela *rel,
9202 struct ppc_link_hash_entry **hash,
9203 struct plt_entry **plt_ent,
9204 bfd_vma destination)
9205 {
9206 struct ppc_link_hash_entry *h = *hash;
9207 bfd_vma location;
9208 bfd_vma branch_offset;
9209 bfd_vma max_branch_offset;
9210 enum elf_ppc64_reloc_type r_type;
9211
9212 if (h != NULL)
9213 {
9214 struct plt_entry *ent;
9215 struct ppc_link_hash_entry *fdh = h;
9216 if (h->oh != NULL
9217 && h->oh->is_func_descriptor)
9218 {
9219 fdh = ppc_follow_link (h->oh);
9220 *hash = fdh;
9221 }
9222
9223 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9224 if (ent->addend == rel->r_addend
9225 && ent->plt.offset != (bfd_vma) -1)
9226 {
9227 *plt_ent = ent;
9228 return ppc_stub_plt_call;
9229 }
9230
9231 /* Here, we know we don't have a plt entry. If we don't have a
9232 either a defined function descriptor or a defined entry symbol
9233 in a regular object file, then it is pointless trying to make
9234 any other type of stub. */
9235 if (!is_static_defined (&fdh->elf)
9236 && !is_static_defined (&h->elf))
9237 return ppc_stub_none;
9238 }
9239 else if (elf_local_got_ents (input_sec->owner) != NULL)
9240 {
9241 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9242 struct plt_entry **local_plt = (struct plt_entry **)
9243 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9244 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9245
9246 if (local_plt[r_symndx] != NULL)
9247 {
9248 struct plt_entry *ent;
9249
9250 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9251 if (ent->addend == rel->r_addend
9252 && ent->plt.offset != (bfd_vma) -1)
9253 {
9254 *plt_ent = ent;
9255 return ppc_stub_plt_call;
9256 }
9257 }
9258 }
9259
9260 /* Determine where the call point is. */
9261 location = (input_sec->output_offset
9262 + input_sec->output_section->vma
9263 + rel->r_offset);
9264
9265 branch_offset = destination - location;
9266 r_type = ELF64_R_TYPE (rel->r_info);
9267
9268 /* Determine if a long branch stub is needed. */
9269 max_branch_offset = 1 << 25;
9270 if (r_type != R_PPC64_REL24)
9271 max_branch_offset = 1 << 15;
9272
9273 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9274 /* We need a stub. Figure out whether a long_branch or plt_branch
9275 is needed later. */
9276 return ppc_stub_long_branch;
9277
9278 return ppc_stub_none;
9279 }
9280
9281 /* Build a .plt call stub. */
9282
9283 static inline bfd_byte *
9284 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r,
9285 bfd_boolean plt_static_chain)
9286 {
9287 #define PPC_LO(v) ((v) & 0xffff)
9288 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9289 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9290
9291 if (PPC_HA (offset) != 0)
9292 {
9293 if (r != NULL)
9294 {
9295 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9296 r[1].r_offset = r[0].r_offset + 8;
9297 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9298 r[1].r_addend = r[0].r_addend;
9299 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9300 {
9301 r[2].r_offset = r[1].r_offset + 4;
9302 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9303 r[2].r_addend = r[0].r_addend;
9304 }
9305 else
9306 {
9307 r[2].r_offset = r[1].r_offset + 8;
9308 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9309 r[2].r_addend = r[0].r_addend + 8;
9310 if (plt_static_chain)
9311 {
9312 r[3].r_offset = r[2].r_offset + 4;
9313 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9314 r[3].r_addend = r[0].r_addend + 16;
9315 }
9316 }
9317 }
9318 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9319 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9320 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9321 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9322 {
9323 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9324 offset = 0;
9325 }
9326 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9327 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9328 if (plt_static_chain)
9329 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9330 bfd_put_32 (obfd, BCTR, p), p += 4;
9331 }
9332 else
9333 {
9334 if (r != NULL)
9335 {
9336 r[0].r_offset += 4;
9337 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9338 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9339 {
9340 r[1].r_offset = r[0].r_offset + 4;
9341 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9342 r[1].r_addend = r[0].r_addend;
9343 }
9344 else
9345 {
9346 r[1].r_offset = r[0].r_offset + 8;
9347 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9348 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9349 if (plt_static_chain)
9350 {
9351 r[2].r_offset = r[1].r_offset + 4;
9352 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9353 r[2].r_addend = r[0].r_addend + 8;
9354 }
9355 }
9356 }
9357 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9358 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9359 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9360 {
9361 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9362 offset = 0;
9363 }
9364 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9365 if (plt_static_chain)
9366 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9367 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9368 bfd_put_32 (obfd, BCTR, p), p += 4;
9369 }
9370 return p;
9371 }
9372
9373 /* Build a special .plt call stub for __tls_get_addr. */
9374
9375 #define LD_R11_0R3 0xe9630000
9376 #define LD_R12_0R3 0xe9830000
9377 #define MR_R0_R3 0x7c601b78
9378 #define CMPDI_R11_0 0x2c2b0000
9379 #define ADD_R3_R12_R13 0x7c6c6a14
9380 #define BEQLR 0x4d820020
9381 #define MR_R3_R0 0x7c030378
9382 #define MFLR_R11 0x7d6802a6
9383 #define STD_R11_0R1 0xf9610000
9384 #define BCTRL 0x4e800421
9385 #define LD_R11_0R1 0xe9610000
9386 #define LD_R2_0R1 0xe8410000
9387 #define MTLR_R11 0x7d6803a6
9388
9389 static inline bfd_byte *
9390 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9391 Elf_Internal_Rela *r, bfd_boolean plt_static_chain)
9392 {
9393 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9394 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9395 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9396 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9397 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9398 bfd_put_32 (obfd, BEQLR, p), p += 4;
9399 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9400 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9401 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9402
9403 if (r != NULL)
9404 r[0].r_offset += 9 * 4;
9405 p = build_plt_stub (obfd, p, offset, r, plt_static_chain);
9406 bfd_put_32 (obfd, BCTRL, p - 4);
9407
9408 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9409 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9410 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9411 bfd_put_32 (obfd, BLR, p), p += 4;
9412
9413 return p;
9414 }
9415
9416 static Elf_Internal_Rela *
9417 get_relocs (asection *sec, int count)
9418 {
9419 Elf_Internal_Rela *relocs;
9420 struct bfd_elf_section_data *elfsec_data;
9421
9422 elfsec_data = elf_section_data (sec);
9423 relocs = elfsec_data->relocs;
9424 if (relocs == NULL)
9425 {
9426 bfd_size_type relsize;
9427 relsize = sec->reloc_count * sizeof (*relocs);
9428 relocs = bfd_alloc (sec->owner, relsize);
9429 if (relocs == NULL)
9430 return NULL;
9431 elfsec_data->relocs = relocs;
9432 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9433 sizeof (Elf_Internal_Shdr));
9434 if (elfsec_data->rela.hdr == NULL)
9435 return NULL;
9436 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9437 * sizeof (Elf64_External_Rela));
9438 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9439 sec->reloc_count = 0;
9440 }
9441 relocs += sec->reloc_count;
9442 sec->reloc_count += count;
9443 return relocs;
9444 }
9445
9446 static bfd_vma
9447 get_r2off (struct bfd_link_info *info,
9448 struct ppc_stub_hash_entry *stub_entry)
9449 {
9450 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9451 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9452
9453 if (r2off == 0)
9454 {
9455 /* Support linking -R objects. Get the toc pointer from the
9456 opd entry. */
9457 char buf[8];
9458 asection *opd = stub_entry->h->elf.root.u.def.section;
9459 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9460
9461 if (strcmp (opd->name, ".opd") != 0
9462 || opd->reloc_count != 0)
9463 {
9464 info->callbacks->einfo (_("%P: cannot find opd entry toc for %s\n"),
9465 stub_entry->h->elf.root.root.string);
9466 bfd_set_error (bfd_error_bad_value);
9467 return 0;
9468 }
9469 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9470 return 0;
9471 r2off = bfd_get_64 (opd->owner, buf);
9472 r2off -= elf_gp (info->output_bfd);
9473 }
9474 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9475 return r2off;
9476 }
9477
9478 static bfd_boolean
9479 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9480 {
9481 struct ppc_stub_hash_entry *stub_entry;
9482 struct ppc_branch_hash_entry *br_entry;
9483 struct bfd_link_info *info;
9484 struct ppc_link_hash_table *htab;
9485 bfd_byte *loc;
9486 bfd_byte *p;
9487 bfd_vma dest, off;
9488 int size;
9489 Elf_Internal_Rela *r;
9490 asection *plt;
9491
9492 /* Massage our args to the form they really have. */
9493 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9494 info = in_arg;
9495
9496 htab = ppc_hash_table (info);
9497 if (htab == NULL)
9498 return FALSE;
9499
9500 /* Make a note of the offset within the stubs for this entry. */
9501 stub_entry->stub_offset = stub_entry->stub_sec->size;
9502 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9503
9504 htab->stub_count[stub_entry->stub_type - 1] += 1;
9505 switch (stub_entry->stub_type)
9506 {
9507 case ppc_stub_long_branch:
9508 case ppc_stub_long_branch_r2off:
9509 /* Branches are relative. This is where we are going to. */
9510 off = dest = (stub_entry->target_value
9511 + stub_entry->target_section->output_offset
9512 + stub_entry->target_section->output_section->vma);
9513
9514 /* And this is where we are coming from. */
9515 off -= (stub_entry->stub_offset
9516 + stub_entry->stub_sec->output_offset
9517 + stub_entry->stub_sec->output_section->vma);
9518
9519 size = 4;
9520 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9521 {
9522 bfd_vma r2off = get_r2off (info, stub_entry);
9523
9524 if (r2off == 0)
9525 {
9526 htab->stub_error = TRUE;
9527 return FALSE;
9528 }
9529 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9530 loc += 4;
9531 size = 12;
9532 if (PPC_HA (r2off) != 0)
9533 {
9534 size = 16;
9535 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9536 loc += 4;
9537 }
9538 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9539 loc += 4;
9540 off -= size - 4;
9541 }
9542 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9543
9544 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9545 {
9546 info->callbacks->einfo (_("%P: long branch stub `%s' offset overflow\n"),
9547 stub_entry->root.string);
9548 htab->stub_error = TRUE;
9549 return FALSE;
9550 }
9551
9552 if (info->emitrelocations)
9553 {
9554 r = get_relocs (stub_entry->stub_sec, 1);
9555 if (r == NULL)
9556 return FALSE;
9557 r->r_offset = loc - stub_entry->stub_sec->contents;
9558 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9559 r->r_addend = dest;
9560 if (stub_entry->h != NULL)
9561 {
9562 struct elf_link_hash_entry **hashes;
9563 unsigned long symndx;
9564 struct ppc_link_hash_entry *h;
9565
9566 hashes = elf_sym_hashes (htab->stub_bfd);
9567 if (hashes == NULL)
9568 {
9569 bfd_size_type hsize;
9570
9571 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9572 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9573 if (hashes == NULL)
9574 return FALSE;
9575 elf_sym_hashes (htab->stub_bfd) = hashes;
9576 htab->stub_globals = 1;
9577 }
9578 symndx = htab->stub_globals++;
9579 h = stub_entry->h;
9580 hashes[symndx] = &h->elf;
9581 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9582 if (h->oh != NULL && h->oh->is_func)
9583 h = ppc_follow_link (h->oh);
9584 if (h->elf.root.u.def.section != stub_entry->target_section)
9585 /* H is an opd symbol. The addend must be zero. */
9586 r->r_addend = 0;
9587 else
9588 {
9589 off = (h->elf.root.u.def.value
9590 + h->elf.root.u.def.section->output_offset
9591 + h->elf.root.u.def.section->output_section->vma);
9592 r->r_addend -= off;
9593 }
9594 }
9595 }
9596 break;
9597
9598 case ppc_stub_plt_branch:
9599 case ppc_stub_plt_branch_r2off:
9600 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9601 stub_entry->root.string + 9,
9602 FALSE, FALSE);
9603 if (br_entry == NULL)
9604 {
9605 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
9606 stub_entry->root.string);
9607 htab->stub_error = TRUE;
9608 return FALSE;
9609 }
9610
9611 dest = (stub_entry->target_value
9612 + stub_entry->target_section->output_offset
9613 + stub_entry->target_section->output_section->vma);
9614
9615 bfd_put_64 (htab->brlt->owner, dest,
9616 htab->brlt->contents + br_entry->offset);
9617
9618 if (br_entry->iter == htab->stub_iteration)
9619 {
9620 br_entry->iter = 0;
9621
9622 if (htab->relbrlt != NULL)
9623 {
9624 /* Create a reloc for the branch lookup table entry. */
9625 Elf_Internal_Rela rela;
9626 bfd_byte *rl;
9627
9628 rela.r_offset = (br_entry->offset
9629 + htab->brlt->output_offset
9630 + htab->brlt->output_section->vma);
9631 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9632 rela.r_addend = dest;
9633
9634 rl = htab->relbrlt->contents;
9635 rl += (htab->relbrlt->reloc_count++
9636 * sizeof (Elf64_External_Rela));
9637 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9638 }
9639 else if (info->emitrelocations)
9640 {
9641 r = get_relocs (htab->brlt, 1);
9642 if (r == NULL)
9643 return FALSE;
9644 /* brlt, being SEC_LINKER_CREATED does not go through the
9645 normal reloc processing. Symbols and offsets are not
9646 translated from input file to output file form, so
9647 set up the offset per the output file. */
9648 r->r_offset = (br_entry->offset
9649 + htab->brlt->output_offset
9650 + htab->brlt->output_section->vma);
9651 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9652 r->r_addend = dest;
9653 }
9654 }
9655
9656 dest = (br_entry->offset
9657 + htab->brlt->output_offset
9658 + htab->brlt->output_section->vma);
9659
9660 off = (dest
9661 - elf_gp (htab->brlt->output_section->owner)
9662 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9663
9664 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9665 {
9666 info->callbacks->einfo
9667 (_("%P: linkage table error against `%s'\n"),
9668 stub_entry->root.string);
9669 bfd_set_error (bfd_error_bad_value);
9670 htab->stub_error = TRUE;
9671 return FALSE;
9672 }
9673
9674 if (info->emitrelocations)
9675 {
9676 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9677 if (r == NULL)
9678 return FALSE;
9679 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9680 if (bfd_big_endian (info->output_bfd))
9681 r[0].r_offset += 2;
9682 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9683 r[0].r_offset += 4;
9684 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9685 r[0].r_addend = dest;
9686 if (PPC_HA (off) != 0)
9687 {
9688 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9689 r[1].r_offset = r[0].r_offset + 4;
9690 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9691 r[1].r_addend = r[0].r_addend;
9692 }
9693 }
9694
9695 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9696 {
9697 if (PPC_HA (off) != 0)
9698 {
9699 size = 16;
9700 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9701 loc += 4;
9702 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9703 }
9704 else
9705 {
9706 size = 12;
9707 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9708 }
9709 }
9710 else
9711 {
9712 bfd_vma r2off = get_r2off (info, stub_entry);
9713
9714 if (r2off == 0)
9715 {
9716 htab->stub_error = TRUE;
9717 return FALSE;
9718 }
9719
9720 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9721 loc += 4;
9722 size = 20;
9723 if (PPC_HA (off) != 0)
9724 {
9725 size += 4;
9726 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9727 loc += 4;
9728 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9729 loc += 4;
9730 }
9731 else
9732 {
9733 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9734 loc += 4;
9735 }
9736
9737 if (PPC_HA (r2off) != 0)
9738 {
9739 size += 4;
9740 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9741 loc += 4;
9742 }
9743 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9744 }
9745 loc += 4;
9746 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9747 loc += 4;
9748 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9749 break;
9750
9751 case ppc_stub_plt_call:
9752 if (stub_entry->h != NULL
9753 && stub_entry->h->is_func_descriptor
9754 && stub_entry->h->oh != NULL)
9755 {
9756 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9757
9758 /* If the old-ABI "dot-symbol" is undefined make it weak so
9759 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9760 FIXME: We used to define the symbol on one of the call
9761 stubs instead, which is why we test symbol section id
9762 against htab->top_id in various places. Likely all
9763 these checks could now disappear. */
9764 if (fh->elf.root.type == bfd_link_hash_undefined)
9765 fh->elf.root.type = bfd_link_hash_undefweak;
9766 /* Stop undo_symbol_twiddle changing it back to undefined. */
9767 fh->was_undefined = 0;
9768 }
9769
9770 /* Now build the stub. */
9771 dest = stub_entry->plt_ent->plt.offset & ~1;
9772 if (dest >= (bfd_vma) -2)
9773 abort ();
9774
9775 plt = htab->plt;
9776 if (!htab->elf.dynamic_sections_created
9777 || stub_entry->h == NULL
9778 || stub_entry->h->elf.dynindx == -1)
9779 plt = htab->iplt;
9780
9781 dest += plt->output_offset + plt->output_section->vma;
9782
9783 if (stub_entry->h == NULL
9784 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9785 {
9786 Elf_Internal_Rela rela;
9787 bfd_byte *rl;
9788
9789 rela.r_offset = dest;
9790 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9791 rela.r_addend = (stub_entry->target_value
9792 + stub_entry->target_section->output_offset
9793 + stub_entry->target_section->output_section->vma);
9794
9795 rl = (htab->reliplt->contents
9796 + (htab->reliplt->reloc_count++
9797 * sizeof (Elf64_External_Rela)));
9798 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9799 stub_entry->plt_ent->plt.offset |= 1;
9800 }
9801
9802 off = (dest
9803 - elf_gp (plt->output_section->owner)
9804 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9805
9806 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9807 {
9808 info->callbacks->einfo
9809 (_("%P: linkage table error against `%s'\n"),
9810 stub_entry->h != NULL
9811 ? stub_entry->h->elf.root.root.string
9812 : "<local sym>");
9813 bfd_set_error (bfd_error_bad_value);
9814 htab->stub_error = TRUE;
9815 return FALSE;
9816 }
9817
9818 r = NULL;
9819 if (info->emitrelocations)
9820 {
9821 r = get_relocs (stub_entry->stub_sec,
9822 (2
9823 + (PPC_HA (off) != 0)
9824 + (htab->plt_static_chain
9825 && PPC_HA (off + 16) == PPC_HA (off))));
9826 if (r == NULL)
9827 return FALSE;
9828 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9829 if (bfd_big_endian (info->output_bfd))
9830 r[0].r_offset += 2;
9831 r[0].r_addend = dest;
9832 }
9833 if (stub_entry->h != NULL
9834 && (stub_entry->h == htab->tls_get_addr_fd
9835 || stub_entry->h == htab->tls_get_addr)
9836 && !htab->no_tls_get_addr_opt)
9837 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r,
9838 htab->plt_static_chain);
9839 else
9840 p = build_plt_stub (htab->stub_bfd, loc, off, r,
9841 htab->plt_static_chain);
9842 size = p - loc;
9843 break;
9844
9845 default:
9846 BFD_FAIL ();
9847 return FALSE;
9848 }
9849
9850 stub_entry->stub_sec->size += size;
9851
9852 if (htab->emit_stub_syms)
9853 {
9854 struct elf_link_hash_entry *h;
9855 size_t len1, len2;
9856 char *name;
9857 const char *const stub_str[] = { "long_branch",
9858 "long_branch_r2off",
9859 "plt_branch",
9860 "plt_branch_r2off",
9861 "plt_call" };
9862
9863 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9864 len2 = strlen (stub_entry->root.string);
9865 name = bfd_malloc (len1 + len2 + 2);
9866 if (name == NULL)
9867 return FALSE;
9868 memcpy (name, stub_entry->root.string, 9);
9869 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9870 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9871 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9872 if (h == NULL)
9873 return FALSE;
9874 if (h->root.type == bfd_link_hash_new)
9875 {
9876 h->root.type = bfd_link_hash_defined;
9877 h->root.u.def.section = stub_entry->stub_sec;
9878 h->root.u.def.value = stub_entry->stub_offset;
9879 h->ref_regular = 1;
9880 h->def_regular = 1;
9881 h->ref_regular_nonweak = 1;
9882 h->forced_local = 1;
9883 h->non_elf = 0;
9884 }
9885 }
9886
9887 return TRUE;
9888 }
9889
9890 /* As above, but don't actually build the stub. Just bump offset so
9891 we know stub section sizes, and select plt_branch stubs where
9892 long_branch stubs won't do. */
9893
9894 static bfd_boolean
9895 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9896 {
9897 struct ppc_stub_hash_entry *stub_entry;
9898 struct bfd_link_info *info;
9899 struct ppc_link_hash_table *htab;
9900 bfd_vma off;
9901 int size;
9902
9903 /* Massage our args to the form they really have. */
9904 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9905 info = in_arg;
9906
9907 htab = ppc_hash_table (info);
9908 if (htab == NULL)
9909 return FALSE;
9910
9911 if (stub_entry->stub_type == ppc_stub_plt_call)
9912 {
9913 asection *plt;
9914 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9915 if (off >= (bfd_vma) -2)
9916 abort ();
9917 plt = htab->plt;
9918 if (!htab->elf.dynamic_sections_created
9919 || stub_entry->h == NULL
9920 || stub_entry->h->elf.dynindx == -1)
9921 plt = htab->iplt;
9922 off += (plt->output_offset
9923 + plt->output_section->vma
9924 - elf_gp (plt->output_section->owner)
9925 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9926
9927 size = PLT_CALL_STUB_SIZE;
9928 if (!htab->plt_static_chain)
9929 size -= 4;
9930 if (PPC_HA (off) == 0)
9931 size -= 4;
9932 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9933 size += 4;
9934 if (stub_entry->h != NULL
9935 && (stub_entry->h == htab->tls_get_addr_fd
9936 || stub_entry->h == htab->tls_get_addr)
9937 && !htab->no_tls_get_addr_opt)
9938 size += 13 * 4;
9939 if (info->emitrelocations)
9940 {
9941 stub_entry->stub_sec->reloc_count
9942 += (2
9943 + (PPC_HA (off) != 0)
9944 + (htab->plt_static_chain
9945 && PPC_HA (off + 16) == PPC_HA (off)));
9946 stub_entry->stub_sec->flags |= SEC_RELOC;
9947 }
9948 }
9949 else
9950 {
9951 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9952 variants. */
9953 bfd_vma r2off = 0;
9954
9955 off = (stub_entry->target_value
9956 + stub_entry->target_section->output_offset
9957 + stub_entry->target_section->output_section->vma);
9958 off -= (stub_entry->stub_sec->size
9959 + stub_entry->stub_sec->output_offset
9960 + stub_entry->stub_sec->output_section->vma);
9961
9962 /* Reset the stub type from the plt variant in case we now
9963 can reach with a shorter stub. */
9964 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9965 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9966
9967 size = 4;
9968 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9969 {
9970 r2off = get_r2off (info, stub_entry);
9971 if (r2off == 0)
9972 {
9973 htab->stub_error = TRUE;
9974 return FALSE;
9975 }
9976 size = 12;
9977 if (PPC_HA (r2off) != 0)
9978 size = 16;
9979 off -= size - 4;
9980 }
9981
9982 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9983 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9984 {
9985 struct ppc_branch_hash_entry *br_entry;
9986
9987 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9988 stub_entry->root.string + 9,
9989 TRUE, FALSE);
9990 if (br_entry == NULL)
9991 {
9992 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
9993 stub_entry->root.string);
9994 htab->stub_error = TRUE;
9995 return FALSE;
9996 }
9997
9998 if (br_entry->iter != htab->stub_iteration)
9999 {
10000 br_entry->iter = htab->stub_iteration;
10001 br_entry->offset = htab->brlt->size;
10002 htab->brlt->size += 8;
10003
10004 if (htab->relbrlt != NULL)
10005 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10006 else if (info->emitrelocations)
10007 {
10008 htab->brlt->reloc_count += 1;
10009 htab->brlt->flags |= SEC_RELOC;
10010 }
10011 }
10012
10013 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10014 off = (br_entry->offset
10015 + htab->brlt->output_offset
10016 + htab->brlt->output_section->vma
10017 - elf_gp (htab->brlt->output_section->owner)
10018 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10019
10020 if (info->emitrelocations)
10021 {
10022 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10023 stub_entry->stub_sec->flags |= SEC_RELOC;
10024 }
10025
10026 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10027 {
10028 size = 12;
10029 if (PPC_HA (off) != 0)
10030 size = 16;
10031 }
10032 else
10033 {
10034 size = 20;
10035 if (PPC_HA (off) != 0)
10036 size += 4;
10037
10038 if (PPC_HA (r2off) != 0)
10039 size += 4;
10040 }
10041 }
10042 else if (info->emitrelocations)
10043 {
10044 stub_entry->stub_sec->reloc_count += 1;
10045 stub_entry->stub_sec->flags |= SEC_RELOC;
10046 }
10047 }
10048
10049 stub_entry->stub_sec->size += size;
10050 return TRUE;
10051 }
10052
10053 /* Set up various things so that we can make a list of input sections
10054 for each output section included in the link. Returns -1 on error,
10055 0 when no stubs will be needed, and 1 on success. */
10056
10057 int
10058 ppc64_elf_setup_section_lists
10059 (struct bfd_link_info *info,
10060 asection *(*add_stub_section) (const char *, asection *),
10061 void (*layout_sections_again) (void))
10062 {
10063 bfd *input_bfd;
10064 int top_id, top_index, id;
10065 asection *section;
10066 asection **input_list;
10067 bfd_size_type amt;
10068 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10069
10070 if (htab == NULL)
10071 return -1;
10072 /* Stash our params away. */
10073 htab->add_stub_section = add_stub_section;
10074 htab->layout_sections_again = layout_sections_again;
10075
10076 if (htab->brlt == NULL)
10077 return 0;
10078
10079 /* Find the top input section id. */
10080 for (input_bfd = info->input_bfds, top_id = 3;
10081 input_bfd != NULL;
10082 input_bfd = input_bfd->link_next)
10083 {
10084 for (section = input_bfd->sections;
10085 section != NULL;
10086 section = section->next)
10087 {
10088 if (top_id < section->id)
10089 top_id = section->id;
10090 }
10091 }
10092
10093 htab->top_id = top_id;
10094 amt = sizeof (struct map_stub) * (top_id + 1);
10095 htab->stub_group = bfd_zmalloc (amt);
10096 if (htab->stub_group == NULL)
10097 return -1;
10098
10099 /* Set toc_off for com, und, abs and ind sections. */
10100 for (id = 0; id < 3; id++)
10101 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10102
10103 /* We can't use output_bfd->section_count here to find the top output
10104 section index as some sections may have been removed, and
10105 strip_excluded_output_sections doesn't renumber the indices. */
10106 for (section = info->output_bfd->sections, top_index = 0;
10107 section != NULL;
10108 section = section->next)
10109 {
10110 if (top_index < section->index)
10111 top_index = section->index;
10112 }
10113
10114 htab->top_index = top_index;
10115 amt = sizeof (asection *) * (top_index + 1);
10116 input_list = bfd_zmalloc (amt);
10117 htab->input_list = input_list;
10118 if (input_list == NULL)
10119 return -1;
10120
10121 return 1;
10122 }
10123
10124 /* Set up for first pass at multitoc partitioning. */
10125
10126 void
10127 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10128 {
10129 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10130
10131 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10132 htab->toc_curr = elf_gp (info->output_bfd);
10133 htab->toc_bfd = NULL;
10134 htab->toc_first_sec = NULL;
10135 }
10136
10137 /* The linker repeatedly calls this function for each TOC input section
10138 and linker generated GOT section. Group input bfds such that the toc
10139 within a group is less than 64k in size. */
10140
10141 bfd_boolean
10142 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10143 {
10144 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10145 bfd_vma addr, off, limit;
10146
10147 if (htab == NULL)
10148 return FALSE;
10149
10150 if (!htab->second_toc_pass)
10151 {
10152 /* Keep track of the first .toc or .got section for this input bfd. */
10153 if (htab->toc_bfd != isec->owner)
10154 {
10155 htab->toc_bfd = isec->owner;
10156 htab->toc_first_sec = isec;
10157 }
10158
10159 addr = isec->output_offset + isec->output_section->vma;
10160 off = addr - htab->toc_curr;
10161 limit = 0x80008000;
10162 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10163 limit = 0x10000;
10164 if (off + isec->size > limit)
10165 {
10166 addr = (htab->toc_first_sec->output_offset
10167 + htab->toc_first_sec->output_section->vma);
10168 htab->toc_curr = addr;
10169 }
10170
10171 /* toc_curr is the base address of this toc group. Set elf_gp
10172 for the input section to be the offset relative to the
10173 output toc base plus 0x8000. Making the input elf_gp an
10174 offset allows us to move the toc as a whole without
10175 recalculating input elf_gp. */
10176 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10177 off += TOC_BASE_OFF;
10178
10179 /* Die if someone uses a linker script that doesn't keep input
10180 file .toc and .got together. */
10181 if (elf_gp (isec->owner) != 0
10182 && elf_gp (isec->owner) != off)
10183 return FALSE;
10184
10185 elf_gp (isec->owner) = off;
10186 return TRUE;
10187 }
10188
10189 /* During the second pass toc_first_sec points to the start of
10190 a toc group, and toc_curr is used to track the old elf_gp.
10191 We use toc_bfd to ensure we only look at each bfd once. */
10192 if (htab->toc_bfd == isec->owner)
10193 return TRUE;
10194 htab->toc_bfd = isec->owner;
10195
10196 if (htab->toc_first_sec == NULL
10197 || htab->toc_curr != elf_gp (isec->owner))
10198 {
10199 htab->toc_curr = elf_gp (isec->owner);
10200 htab->toc_first_sec = isec;
10201 }
10202 addr = (htab->toc_first_sec->output_offset
10203 + htab->toc_first_sec->output_section->vma);
10204 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10205 elf_gp (isec->owner) = off;
10206
10207 return TRUE;
10208 }
10209
10210 /* Called via elf_link_hash_traverse to merge GOT entries for global
10211 symbol H. */
10212
10213 static bfd_boolean
10214 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10215 {
10216 if (h->root.type == bfd_link_hash_indirect)
10217 return TRUE;
10218
10219 merge_got_entries (&h->got.glist);
10220
10221 return TRUE;
10222 }
10223
10224 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10225 symbol H. */
10226
10227 static bfd_boolean
10228 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10229 {
10230 struct got_entry *gent;
10231
10232 if (h->root.type == bfd_link_hash_indirect)
10233 return TRUE;
10234
10235 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10236 if (!gent->is_indirect)
10237 allocate_got (h, (struct bfd_link_info *) inf, gent);
10238 return TRUE;
10239 }
10240
10241 /* Called on the first multitoc pass after the last call to
10242 ppc64_elf_next_toc_section. This function removes duplicate GOT
10243 entries. */
10244
10245 bfd_boolean
10246 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10247 {
10248 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10249 struct bfd *ibfd, *ibfd2;
10250 bfd_boolean done_something;
10251
10252 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10253
10254 if (!htab->do_multi_toc)
10255 return FALSE;
10256
10257 /* Merge global sym got entries within a toc group. */
10258 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10259
10260 /* And tlsld_got. */
10261 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10262 {
10263 struct got_entry *ent, *ent2;
10264
10265 if (!is_ppc64_elf (ibfd))
10266 continue;
10267
10268 ent = ppc64_tlsld_got (ibfd);
10269 if (!ent->is_indirect
10270 && ent->got.offset != (bfd_vma) -1)
10271 {
10272 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10273 {
10274 if (!is_ppc64_elf (ibfd2))
10275 continue;
10276
10277 ent2 = ppc64_tlsld_got (ibfd2);
10278 if (!ent2->is_indirect
10279 && ent2->got.offset != (bfd_vma) -1
10280 && elf_gp (ibfd2) == elf_gp (ibfd))
10281 {
10282 ent2->is_indirect = TRUE;
10283 ent2->got.ent = ent;
10284 }
10285 }
10286 }
10287 }
10288
10289 /* Zap sizes of got sections. */
10290 htab->reliplt->rawsize = htab->reliplt->size;
10291 htab->reliplt->size -= htab->got_reli_size;
10292 htab->got_reli_size = 0;
10293
10294 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10295 {
10296 asection *got, *relgot;
10297
10298 if (!is_ppc64_elf (ibfd))
10299 continue;
10300
10301 got = ppc64_elf_tdata (ibfd)->got;
10302 if (got != NULL)
10303 {
10304 got->rawsize = got->size;
10305 got->size = 0;
10306 relgot = ppc64_elf_tdata (ibfd)->relgot;
10307 relgot->rawsize = relgot->size;
10308 relgot->size = 0;
10309 }
10310 }
10311
10312 /* Now reallocate the got, local syms first. We don't need to
10313 allocate section contents again since we never increase size. */
10314 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10315 {
10316 struct got_entry **lgot_ents;
10317 struct got_entry **end_lgot_ents;
10318 struct plt_entry **local_plt;
10319 struct plt_entry **end_local_plt;
10320 unsigned char *lgot_masks;
10321 bfd_size_type locsymcount;
10322 Elf_Internal_Shdr *symtab_hdr;
10323 asection *s, *srel;
10324
10325 if (!is_ppc64_elf (ibfd))
10326 continue;
10327
10328 lgot_ents = elf_local_got_ents (ibfd);
10329 if (!lgot_ents)
10330 continue;
10331
10332 symtab_hdr = &elf_symtab_hdr (ibfd);
10333 locsymcount = symtab_hdr->sh_info;
10334 end_lgot_ents = lgot_ents + locsymcount;
10335 local_plt = (struct plt_entry **) end_lgot_ents;
10336 end_local_plt = local_plt + locsymcount;
10337 lgot_masks = (unsigned char *) end_local_plt;
10338 s = ppc64_elf_tdata (ibfd)->got;
10339 srel = ppc64_elf_tdata (ibfd)->relgot;
10340 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10341 {
10342 struct got_entry *ent;
10343
10344 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10345 {
10346 unsigned int num = 1;
10347 ent->got.offset = s->size;
10348 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10349 num = 2;
10350 s->size += num * 8;
10351 if (info->shared)
10352 srel->size += num * sizeof (Elf64_External_Rela);
10353 else if ((*lgot_masks & PLT_IFUNC) != 0)
10354 {
10355 htab->reliplt->size
10356 += num * sizeof (Elf64_External_Rela);
10357 htab->got_reli_size
10358 += num * sizeof (Elf64_External_Rela);
10359 }
10360 }
10361 }
10362 }
10363
10364 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10365
10366 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10367 {
10368 struct got_entry *ent;
10369
10370 if (!is_ppc64_elf (ibfd))
10371 continue;
10372
10373 ent = ppc64_tlsld_got (ibfd);
10374 if (!ent->is_indirect
10375 && ent->got.offset != (bfd_vma) -1)
10376 {
10377 asection *s = ppc64_elf_tdata (ibfd)->got;
10378 ent->got.offset = s->size;
10379 s->size += 16;
10380 if (info->shared)
10381 {
10382 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10383 srel->size += sizeof (Elf64_External_Rela);
10384 }
10385 }
10386 }
10387
10388 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10389 if (!done_something)
10390 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10391 {
10392 asection *got;
10393
10394 if (!is_ppc64_elf (ibfd))
10395 continue;
10396
10397 got = ppc64_elf_tdata (ibfd)->got;
10398 if (got != NULL)
10399 {
10400 done_something = got->rawsize != got->size;
10401 if (done_something)
10402 break;
10403 }
10404 }
10405
10406 if (done_something)
10407 (*htab->layout_sections_again) ();
10408
10409 /* Set up for second pass over toc sections to recalculate elf_gp
10410 on input sections. */
10411 htab->toc_bfd = NULL;
10412 htab->toc_first_sec = NULL;
10413 htab->second_toc_pass = TRUE;
10414 return done_something;
10415 }
10416
10417 /* Called after second pass of multitoc partitioning. */
10418
10419 void
10420 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10421 {
10422 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10423
10424 /* After the second pass, toc_curr tracks the TOC offset used
10425 for code sections below in ppc64_elf_next_input_section. */
10426 htab->toc_curr = TOC_BASE_OFF;
10427 }
10428
10429 /* No toc references were found in ISEC. If the code in ISEC makes no
10430 calls, then there's no need to use toc adjusting stubs when branching
10431 into ISEC. Actually, indirect calls from ISEC are OK as they will
10432 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10433 needed, and 2 if a cyclical call-graph was found but no other reason
10434 for a stub was detected. If called from the top level, a return of
10435 2 means the same as a return of 0. */
10436
10437 static int
10438 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10439 {
10440 int ret;
10441
10442 /* Mark this section as checked. */
10443 isec->call_check_done = 1;
10444
10445 /* We know none of our code bearing sections will need toc stubs. */
10446 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10447 return 0;
10448
10449 if (isec->size == 0)
10450 return 0;
10451
10452 if (isec->output_section == NULL)
10453 return 0;
10454
10455 ret = 0;
10456 if (isec->reloc_count != 0)
10457 {
10458 Elf_Internal_Rela *relstart, *rel;
10459 Elf_Internal_Sym *local_syms;
10460 struct ppc_link_hash_table *htab;
10461
10462 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10463 info->keep_memory);
10464 if (relstart == NULL)
10465 return -1;
10466
10467 /* Look for branches to outside of this section. */
10468 local_syms = NULL;
10469 htab = ppc_hash_table (info);
10470 if (htab == NULL)
10471 return -1;
10472
10473 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10474 {
10475 enum elf_ppc64_reloc_type r_type;
10476 unsigned long r_symndx;
10477 struct elf_link_hash_entry *h;
10478 struct ppc_link_hash_entry *eh;
10479 Elf_Internal_Sym *sym;
10480 asection *sym_sec;
10481 struct _opd_sec_data *opd;
10482 bfd_vma sym_value;
10483 bfd_vma dest;
10484
10485 r_type = ELF64_R_TYPE (rel->r_info);
10486 if (r_type != R_PPC64_REL24
10487 && r_type != R_PPC64_REL14
10488 && r_type != R_PPC64_REL14_BRTAKEN
10489 && r_type != R_PPC64_REL14_BRNTAKEN)
10490 continue;
10491
10492 r_symndx = ELF64_R_SYM (rel->r_info);
10493 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10494 isec->owner))
10495 {
10496 ret = -1;
10497 break;
10498 }
10499
10500 /* Calls to dynamic lib functions go through a plt call stub
10501 that uses r2. */
10502 eh = (struct ppc_link_hash_entry *) h;
10503 if (eh != NULL
10504 && (eh->elf.plt.plist != NULL
10505 || (eh->oh != NULL
10506 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10507 {
10508 ret = 1;
10509 break;
10510 }
10511
10512 if (sym_sec == NULL)
10513 /* Ignore other undefined symbols. */
10514 continue;
10515
10516 /* Assume branches to other sections not included in the
10517 link need stubs too, to cover -R and absolute syms. */
10518 if (sym_sec->output_section == NULL)
10519 {
10520 ret = 1;
10521 break;
10522 }
10523
10524 if (h == NULL)
10525 sym_value = sym->st_value;
10526 else
10527 {
10528 if (h->root.type != bfd_link_hash_defined
10529 && h->root.type != bfd_link_hash_defweak)
10530 abort ();
10531 sym_value = h->root.u.def.value;
10532 }
10533 sym_value += rel->r_addend;
10534
10535 /* If this branch reloc uses an opd sym, find the code section. */
10536 opd = get_opd_info (sym_sec);
10537 if (opd != NULL)
10538 {
10539 if (h == NULL && opd->adjust != NULL)
10540 {
10541 long adjust;
10542
10543 adjust = opd->adjust[sym->st_value / 8];
10544 if (adjust == -1)
10545 /* Assume deleted functions won't ever be called. */
10546 continue;
10547 sym_value += adjust;
10548 }
10549
10550 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10551 if (dest == (bfd_vma) -1)
10552 continue;
10553 }
10554 else
10555 dest = (sym_value
10556 + sym_sec->output_offset
10557 + sym_sec->output_section->vma);
10558
10559 /* Ignore branch to self. */
10560 if (sym_sec == isec)
10561 continue;
10562
10563 /* If the called function uses the toc, we need a stub. */
10564 if (sym_sec->has_toc_reloc
10565 || sym_sec->makes_toc_func_call)
10566 {
10567 ret = 1;
10568 break;
10569 }
10570
10571 /* Assume any branch that needs a long branch stub might in fact
10572 need a plt_branch stub. A plt_branch stub uses r2. */
10573 else if (dest - (isec->output_offset
10574 + isec->output_section->vma
10575 + rel->r_offset) + (1 << 25) >= (2 << 25))
10576 {
10577 ret = 1;
10578 break;
10579 }
10580
10581 /* If calling back to a section in the process of being
10582 tested, we can't say for sure that no toc adjusting stubs
10583 are needed, so don't return zero. */
10584 else if (sym_sec->call_check_in_progress)
10585 ret = 2;
10586
10587 /* Branches to another section that itself doesn't have any TOC
10588 references are OK. Recursively call ourselves to check. */
10589 else if (!sym_sec->call_check_done)
10590 {
10591 int recur;
10592
10593 /* Mark current section as indeterminate, so that other
10594 sections that call back to current won't be marked as
10595 known. */
10596 isec->call_check_in_progress = 1;
10597 recur = toc_adjusting_stub_needed (info, sym_sec);
10598 isec->call_check_in_progress = 0;
10599
10600 if (recur != 0)
10601 {
10602 ret = recur;
10603 if (recur != 2)
10604 break;
10605 }
10606 }
10607 }
10608
10609 if (local_syms != NULL
10610 && (elf_symtab_hdr (isec->owner).contents
10611 != (unsigned char *) local_syms))
10612 free (local_syms);
10613 if (elf_section_data (isec)->relocs != relstart)
10614 free (relstart);
10615 }
10616
10617 if ((ret & 1) == 0
10618 && isec->map_head.s != NULL
10619 && (strcmp (isec->output_section->name, ".init") == 0
10620 || strcmp (isec->output_section->name, ".fini") == 0))
10621 {
10622 if (isec->map_head.s->has_toc_reloc
10623 || isec->map_head.s->makes_toc_func_call)
10624 ret = 1;
10625 else if (!isec->map_head.s->call_check_done)
10626 {
10627 int recur;
10628 isec->call_check_in_progress = 1;
10629 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10630 isec->call_check_in_progress = 0;
10631 if (recur != 0)
10632 ret = recur;
10633 }
10634 }
10635
10636 if (ret == 1)
10637 isec->makes_toc_func_call = 1;
10638
10639 return ret;
10640 }
10641
10642 /* The linker repeatedly calls this function for each input section,
10643 in the order that input sections are linked into output sections.
10644 Build lists of input sections to determine groupings between which
10645 we may insert linker stubs. */
10646
10647 bfd_boolean
10648 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10649 {
10650 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10651
10652 if (htab == NULL)
10653 return FALSE;
10654
10655 if ((isec->output_section->flags & SEC_CODE) != 0
10656 && isec->output_section->index <= htab->top_index)
10657 {
10658 asection **list = htab->input_list + isec->output_section->index;
10659 /* Steal the link_sec pointer for our list. */
10660 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10661 /* This happens to make the list in reverse order,
10662 which is what we want. */
10663 PREV_SEC (isec) = *list;
10664 *list = isec;
10665 }
10666
10667 if (htab->multi_toc_needed)
10668 {
10669 /* If a code section has a function that uses the TOC then we need
10670 to use the right TOC (obviously). Also, make sure that .opd gets
10671 the correct TOC value for R_PPC64_TOC relocs that don't have or
10672 can't find their function symbol (shouldn't ever happen now).
10673 Also specially treat .fixup for the linux kernel. .fixup
10674 contains branches, but only back to the function that hit an
10675 exception. */
10676 if (isec->has_toc_reloc
10677 || (isec->flags & SEC_CODE) == 0
10678 || strcmp (isec->name, ".fixup") == 0)
10679 {
10680 if (elf_gp (isec->owner) != 0)
10681 htab->toc_curr = elf_gp (isec->owner);
10682 }
10683 else
10684 {
10685 if (!isec->call_check_done
10686 && toc_adjusting_stub_needed (info, isec) < 0)
10687 return FALSE;
10688 /* If we make a local call from this section, ie. a branch
10689 without a following nop, then we have no place to put a
10690 toc restoring insn. We must use the same toc group as
10691 the callee.
10692 Testing makes_toc_func_call actually tests for *any*
10693 calls to functions that need a good toc pointer. A more
10694 precise test would be better, as this one will set
10695 incorrect values for pasted .init/.fini fragments.
10696 (Fixed later in check_pasted_section.) */
10697 if (isec->makes_toc_func_call
10698 && elf_gp (isec->owner) != 0)
10699 htab->toc_curr = elf_gp (isec->owner);
10700 }
10701 }
10702
10703 /* Functions that don't use the TOC can belong in any TOC group.
10704 Use the last TOC base. */
10705 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10706 return TRUE;
10707 }
10708
10709 /* Check that all .init and .fini sections use the same toc, if they
10710 have toc relocs. */
10711
10712 static bfd_boolean
10713 check_pasted_section (struct bfd_link_info *info, const char *name)
10714 {
10715 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10716
10717 if (o != NULL)
10718 {
10719 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10720 bfd_vma toc_off = 0;
10721 asection *i;
10722
10723 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10724 if (i->has_toc_reloc)
10725 {
10726 if (toc_off == 0)
10727 toc_off = htab->stub_group[i->id].toc_off;
10728 else if (toc_off != htab->stub_group[i->id].toc_off)
10729 return FALSE;
10730 }
10731
10732 if (toc_off == 0)
10733 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10734 if (i->makes_toc_func_call)
10735 {
10736 toc_off = htab->stub_group[i->id].toc_off;
10737 break;
10738 }
10739
10740 /* Make sure the whole pasted function uses the same toc offset. */
10741 if (toc_off != 0)
10742 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10743 htab->stub_group[i->id].toc_off = toc_off;
10744 }
10745 return TRUE;
10746 }
10747
10748 bfd_boolean
10749 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10750 {
10751 return (check_pasted_section (info, ".init")
10752 & check_pasted_section (info, ".fini"));
10753 }
10754
10755 /* See whether we can group stub sections together. Grouping stub
10756 sections may result in fewer stubs. More importantly, we need to
10757 put all .init* and .fini* stubs at the beginning of the .init or
10758 .fini output sections respectively, because glibc splits the
10759 _init and _fini functions into multiple parts. Putting a stub in
10760 the middle of a function is not a good idea. */
10761
10762 static void
10763 group_sections (struct ppc_link_hash_table *htab,
10764 bfd_size_type stub_group_size,
10765 bfd_boolean stubs_always_before_branch)
10766 {
10767 asection **list;
10768 bfd_size_type stub14_group_size;
10769 bfd_boolean suppress_size_errors;
10770
10771 suppress_size_errors = FALSE;
10772 stub14_group_size = stub_group_size;
10773 if (stub_group_size == 1)
10774 {
10775 /* Default values. */
10776 if (stubs_always_before_branch)
10777 {
10778 stub_group_size = 0x1e00000;
10779 stub14_group_size = 0x7800;
10780 }
10781 else
10782 {
10783 stub_group_size = 0x1c00000;
10784 stub14_group_size = 0x7000;
10785 }
10786 suppress_size_errors = TRUE;
10787 }
10788
10789 list = htab->input_list + htab->top_index;
10790 do
10791 {
10792 asection *tail = *list;
10793 while (tail != NULL)
10794 {
10795 asection *curr;
10796 asection *prev;
10797 bfd_size_type total;
10798 bfd_boolean big_sec;
10799 bfd_vma curr_toc;
10800
10801 curr = tail;
10802 total = tail->size;
10803 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10804 && ppc64_elf_section_data (tail)->has_14bit_branch
10805 ? stub14_group_size : stub_group_size);
10806 if (big_sec && !suppress_size_errors)
10807 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10808 tail->owner, tail);
10809 curr_toc = htab->stub_group[tail->id].toc_off;
10810
10811 while ((prev = PREV_SEC (curr)) != NULL
10812 && ((total += curr->output_offset - prev->output_offset)
10813 < (ppc64_elf_section_data (prev) != NULL
10814 && ppc64_elf_section_data (prev)->has_14bit_branch
10815 ? stub14_group_size : stub_group_size))
10816 && htab->stub_group[prev->id].toc_off == curr_toc)
10817 curr = prev;
10818
10819 /* OK, the size from the start of CURR to the end is less
10820 than stub_group_size and thus can be handled by one stub
10821 section. (or the tail section is itself larger than
10822 stub_group_size, in which case we may be toast.) We
10823 should really be keeping track of the total size of stubs
10824 added here, as stubs contribute to the final output
10825 section size. That's a little tricky, and this way will
10826 only break if stubs added make the total size more than
10827 2^25, ie. for the default stub_group_size, if stubs total
10828 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10829 do
10830 {
10831 prev = PREV_SEC (tail);
10832 /* Set up this stub group. */
10833 htab->stub_group[tail->id].link_sec = curr;
10834 }
10835 while (tail != curr && (tail = prev) != NULL);
10836
10837 /* But wait, there's more! Input sections up to stub_group_size
10838 bytes before the stub section can be handled by it too.
10839 Don't do this if we have a really large section after the
10840 stubs, as adding more stubs increases the chance that
10841 branches may not reach into the stub section. */
10842 if (!stubs_always_before_branch && !big_sec)
10843 {
10844 total = 0;
10845 while (prev != NULL
10846 && ((total += tail->output_offset - prev->output_offset)
10847 < (ppc64_elf_section_data (prev) != NULL
10848 && ppc64_elf_section_data (prev)->has_14bit_branch
10849 ? stub14_group_size : stub_group_size))
10850 && htab->stub_group[prev->id].toc_off == curr_toc)
10851 {
10852 tail = prev;
10853 prev = PREV_SEC (tail);
10854 htab->stub_group[tail->id].link_sec = curr;
10855 }
10856 }
10857 tail = prev;
10858 }
10859 }
10860 while (list-- != htab->input_list);
10861 free (htab->input_list);
10862 #undef PREV_SEC
10863 }
10864
10865 static const unsigned char glink_eh_frame_cie[] =
10866 {
10867 0, 0, 0, 16, /* length. */
10868 0, 0, 0, 0, /* id. */
10869 1, /* CIE version. */
10870 'z', 'R', 0, /* Augmentation string. */
10871 4, /* Code alignment. */
10872 0x78, /* Data alignment. */
10873 65, /* RA reg. */
10874 1, /* Augmentation size. */
10875 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
10876 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
10877 };
10878
10879 /* Stripping output sections is normally done before dynamic section
10880 symbols have been allocated. This function is called later, and
10881 handles cases like htab->brlt which is mapped to its own output
10882 section. */
10883
10884 static void
10885 maybe_strip_output (struct bfd_link_info *info, asection *isec)
10886 {
10887 if (isec->size == 0
10888 && isec->output_section->size == 0
10889 && !bfd_section_removed_from_list (info->output_bfd,
10890 isec->output_section)
10891 && elf_section_data (isec->output_section)->dynindx == 0)
10892 {
10893 isec->output_section->flags |= SEC_EXCLUDE;
10894 bfd_section_list_remove (info->output_bfd, isec->output_section);
10895 info->output_bfd->section_count--;
10896 }
10897 }
10898
10899 /* Determine and set the size of the stub section for a final link.
10900
10901 The basic idea here is to examine all the relocations looking for
10902 PC-relative calls to a target that is unreachable with a "bl"
10903 instruction. */
10904
10905 bfd_boolean
10906 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
10907 bfd_boolean plt_static_chain)
10908 {
10909 bfd_size_type stub_group_size;
10910 bfd_boolean stubs_always_before_branch;
10911 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10912
10913 if (htab == NULL)
10914 return FALSE;
10915
10916 htab->plt_static_chain = plt_static_chain;
10917 stubs_always_before_branch = group_size < 0;
10918 if (group_size < 0)
10919 stub_group_size = -group_size;
10920 else
10921 stub_group_size = group_size;
10922
10923 group_sections (htab, stub_group_size, stubs_always_before_branch);
10924
10925 while (1)
10926 {
10927 bfd *input_bfd;
10928 unsigned int bfd_indx;
10929 asection *stub_sec;
10930
10931 htab->stub_iteration += 1;
10932
10933 for (input_bfd = info->input_bfds, bfd_indx = 0;
10934 input_bfd != NULL;
10935 input_bfd = input_bfd->link_next, bfd_indx++)
10936 {
10937 Elf_Internal_Shdr *symtab_hdr;
10938 asection *section;
10939 Elf_Internal_Sym *local_syms = NULL;
10940
10941 if (!is_ppc64_elf (input_bfd))
10942 continue;
10943
10944 /* We'll need the symbol table in a second. */
10945 symtab_hdr = &elf_symtab_hdr (input_bfd);
10946 if (symtab_hdr->sh_info == 0)
10947 continue;
10948
10949 /* Walk over each section attached to the input bfd. */
10950 for (section = input_bfd->sections;
10951 section != NULL;
10952 section = section->next)
10953 {
10954 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10955
10956 /* If there aren't any relocs, then there's nothing more
10957 to do. */
10958 if ((section->flags & SEC_RELOC) == 0
10959 || (section->flags & SEC_ALLOC) == 0
10960 || (section->flags & SEC_LOAD) == 0
10961 || (section->flags & SEC_CODE) == 0
10962 || section->reloc_count == 0)
10963 continue;
10964
10965 /* If this section is a link-once section that will be
10966 discarded, then don't create any stubs. */
10967 if (section->output_section == NULL
10968 || section->output_section->owner != info->output_bfd)
10969 continue;
10970
10971 /* Get the relocs. */
10972 internal_relocs
10973 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10974 info->keep_memory);
10975 if (internal_relocs == NULL)
10976 goto error_ret_free_local;
10977
10978 /* Now examine each relocation. */
10979 irela = internal_relocs;
10980 irelaend = irela + section->reloc_count;
10981 for (; irela < irelaend; irela++)
10982 {
10983 enum elf_ppc64_reloc_type r_type;
10984 unsigned int r_indx;
10985 enum ppc_stub_type stub_type;
10986 struct ppc_stub_hash_entry *stub_entry;
10987 asection *sym_sec, *code_sec;
10988 bfd_vma sym_value, code_value;
10989 bfd_vma destination;
10990 bfd_boolean ok_dest;
10991 struct ppc_link_hash_entry *hash;
10992 struct ppc_link_hash_entry *fdh;
10993 struct elf_link_hash_entry *h;
10994 Elf_Internal_Sym *sym;
10995 char *stub_name;
10996 const asection *id_sec;
10997 struct _opd_sec_data *opd;
10998 struct plt_entry *plt_ent;
10999
11000 r_type = ELF64_R_TYPE (irela->r_info);
11001 r_indx = ELF64_R_SYM (irela->r_info);
11002
11003 if (r_type >= R_PPC64_max)
11004 {
11005 bfd_set_error (bfd_error_bad_value);
11006 goto error_ret_free_internal;
11007 }
11008
11009 /* Only look for stubs on branch instructions. */
11010 if (r_type != R_PPC64_REL24
11011 && r_type != R_PPC64_REL14
11012 && r_type != R_PPC64_REL14_BRTAKEN
11013 && r_type != R_PPC64_REL14_BRNTAKEN)
11014 continue;
11015
11016 /* Now determine the call target, its name, value,
11017 section. */
11018 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11019 r_indx, input_bfd))
11020 goto error_ret_free_internal;
11021 hash = (struct ppc_link_hash_entry *) h;
11022
11023 ok_dest = FALSE;
11024 fdh = NULL;
11025 sym_value = 0;
11026 if (hash == NULL)
11027 {
11028 sym_value = sym->st_value;
11029 ok_dest = TRUE;
11030 }
11031 else if (hash->elf.root.type == bfd_link_hash_defined
11032 || hash->elf.root.type == bfd_link_hash_defweak)
11033 {
11034 sym_value = hash->elf.root.u.def.value;
11035 if (sym_sec->output_section != NULL)
11036 ok_dest = TRUE;
11037 }
11038 else if (hash->elf.root.type == bfd_link_hash_undefweak
11039 || hash->elf.root.type == bfd_link_hash_undefined)
11040 {
11041 /* Recognise an old ABI func code entry sym, and
11042 use the func descriptor sym instead if it is
11043 defined. */
11044 if (hash->elf.root.root.string[0] == '.'
11045 && (fdh = lookup_fdh (hash, htab)) != NULL)
11046 {
11047 if (fdh->elf.root.type == bfd_link_hash_defined
11048 || fdh->elf.root.type == bfd_link_hash_defweak)
11049 {
11050 sym_sec = fdh->elf.root.u.def.section;
11051 sym_value = fdh->elf.root.u.def.value;
11052 if (sym_sec->output_section != NULL)
11053 ok_dest = TRUE;
11054 }
11055 else
11056 fdh = NULL;
11057 }
11058 }
11059 else
11060 {
11061 bfd_set_error (bfd_error_bad_value);
11062 goto error_ret_free_internal;
11063 }
11064
11065 destination = 0;
11066 if (ok_dest)
11067 {
11068 sym_value += irela->r_addend;
11069 destination = (sym_value
11070 + sym_sec->output_offset
11071 + sym_sec->output_section->vma);
11072 }
11073
11074 code_sec = sym_sec;
11075 code_value = sym_value;
11076 opd = get_opd_info (sym_sec);
11077 if (opd != NULL)
11078 {
11079 bfd_vma dest;
11080
11081 if (hash == NULL && opd->adjust != NULL)
11082 {
11083 long adjust = opd->adjust[sym_value / 8];
11084 if (adjust == -1)
11085 continue;
11086 code_value += adjust;
11087 sym_value += adjust;
11088 }
11089 dest = opd_entry_value (sym_sec, sym_value,
11090 &code_sec, &code_value);
11091 if (dest != (bfd_vma) -1)
11092 {
11093 destination = dest;
11094 if (fdh != NULL)
11095 {
11096 /* Fixup old ABI sym to point at code
11097 entry. */
11098 hash->elf.root.type = bfd_link_hash_defweak;
11099 hash->elf.root.u.def.section = code_sec;
11100 hash->elf.root.u.def.value = code_value;
11101 }
11102 }
11103 }
11104
11105 /* Determine what (if any) linker stub is needed. */
11106 plt_ent = NULL;
11107 stub_type = ppc_type_of_stub (section, irela, &hash,
11108 &plt_ent, destination);
11109
11110 if (stub_type != ppc_stub_plt_call)
11111 {
11112 /* Check whether we need a TOC adjusting stub.
11113 Since the linker pastes together pieces from
11114 different object files when creating the
11115 _init and _fini functions, it may be that a
11116 call to what looks like a local sym is in
11117 fact a call needing a TOC adjustment. */
11118 if (code_sec != NULL
11119 && code_sec->output_section != NULL
11120 && (htab->stub_group[code_sec->id].toc_off
11121 != htab->stub_group[section->id].toc_off)
11122 && (code_sec->has_toc_reloc
11123 || code_sec->makes_toc_func_call))
11124 stub_type = ppc_stub_long_branch_r2off;
11125 }
11126
11127 if (stub_type == ppc_stub_none)
11128 continue;
11129
11130 /* __tls_get_addr calls might be eliminated. */
11131 if (stub_type != ppc_stub_plt_call
11132 && hash != NULL
11133 && (hash == htab->tls_get_addr
11134 || hash == htab->tls_get_addr_fd)
11135 && section->has_tls_reloc
11136 && irela != internal_relocs)
11137 {
11138 /* Get tls info. */
11139 unsigned char *tls_mask;
11140
11141 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11142 irela - 1, input_bfd))
11143 goto error_ret_free_internal;
11144 if (*tls_mask != 0)
11145 continue;
11146 }
11147
11148 /* Support for grouping stub sections. */
11149 id_sec = htab->stub_group[section->id].link_sec;
11150
11151 /* Get the name of this stub. */
11152 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11153 if (!stub_name)
11154 goto error_ret_free_internal;
11155
11156 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11157 stub_name, FALSE, FALSE);
11158 if (stub_entry != NULL)
11159 {
11160 /* The proper stub has already been created. */
11161 free (stub_name);
11162 continue;
11163 }
11164
11165 stub_entry = ppc_add_stub (stub_name, section, info);
11166 if (stub_entry == NULL)
11167 {
11168 free (stub_name);
11169 error_ret_free_internal:
11170 if (elf_section_data (section)->relocs == NULL)
11171 free (internal_relocs);
11172 error_ret_free_local:
11173 if (local_syms != NULL
11174 && (symtab_hdr->contents
11175 != (unsigned char *) local_syms))
11176 free (local_syms);
11177 return FALSE;
11178 }
11179
11180 stub_entry->stub_type = stub_type;
11181 if (stub_type != ppc_stub_plt_call)
11182 {
11183 stub_entry->target_value = code_value;
11184 stub_entry->target_section = code_sec;
11185 }
11186 else
11187 {
11188 stub_entry->target_value = sym_value;
11189 stub_entry->target_section = sym_sec;
11190 }
11191 stub_entry->h = hash;
11192 stub_entry->plt_ent = plt_ent;
11193 stub_entry->addend = irela->r_addend;
11194
11195 if (stub_entry->h != NULL)
11196 htab->stub_globals += 1;
11197 }
11198
11199 /* We're done with the internal relocs, free them. */
11200 if (elf_section_data (section)->relocs != internal_relocs)
11201 free (internal_relocs);
11202 }
11203
11204 if (local_syms != NULL
11205 && symtab_hdr->contents != (unsigned char *) local_syms)
11206 {
11207 if (!info->keep_memory)
11208 free (local_syms);
11209 else
11210 symtab_hdr->contents = (unsigned char *) local_syms;
11211 }
11212 }
11213
11214 /* We may have added some stubs. Find out the new size of the
11215 stub sections. */
11216 for (stub_sec = htab->stub_bfd->sections;
11217 stub_sec != NULL;
11218 stub_sec = stub_sec->next)
11219 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11220 {
11221 stub_sec->rawsize = stub_sec->size;
11222 stub_sec->size = 0;
11223 stub_sec->reloc_count = 0;
11224 stub_sec->flags &= ~SEC_RELOC;
11225 }
11226
11227 htab->brlt->size = 0;
11228 htab->brlt->reloc_count = 0;
11229 htab->brlt->flags &= ~SEC_RELOC;
11230 if (htab->relbrlt != NULL)
11231 htab->relbrlt->size = 0;
11232
11233 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11234
11235 if (info->emitrelocations
11236 && htab->glink != NULL && htab->glink->size != 0)
11237 {
11238 htab->glink->reloc_count = 1;
11239 htab->glink->flags |= SEC_RELOC;
11240 }
11241
11242 if (htab->glink_eh_frame != NULL
11243 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11244 && (htab->glink_eh_frame->flags & SEC_EXCLUDE) == 0)
11245 {
11246 bfd_size_type size = 0;
11247
11248 for (stub_sec = htab->stub_bfd->sections;
11249 stub_sec != NULL;
11250 stub_sec = stub_sec->next)
11251 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11252 size += 20;
11253 if (htab->glink != NULL && htab->glink->size != 0)
11254 size += 24;
11255 if (size != 0)
11256 size += sizeof (glink_eh_frame_cie);
11257 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11258 htab->glink_eh_frame->size = size;
11259 }
11260
11261 for (stub_sec = htab->stub_bfd->sections;
11262 stub_sec != NULL;
11263 stub_sec = stub_sec->next)
11264 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11265 && stub_sec->rawsize != stub_sec->size)
11266 break;
11267
11268 /* Exit from this loop when no stubs have been added, and no stubs
11269 have changed size. */
11270 if (stub_sec == NULL
11271 && (htab->glink_eh_frame == NULL
11272 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11273 break;
11274
11275 /* Ask the linker to do its stuff. */
11276 (*htab->layout_sections_again) ();
11277 }
11278
11279 maybe_strip_output (info, htab->brlt);
11280 if (htab->glink_eh_frame != NULL)
11281 maybe_strip_output (info, htab->glink_eh_frame);
11282
11283 return TRUE;
11284 }
11285
11286 /* Called after we have determined section placement. If sections
11287 move, we'll be called again. Provide a value for TOCstart. */
11288
11289 bfd_vma
11290 ppc64_elf_toc (bfd *obfd)
11291 {
11292 asection *s;
11293 bfd_vma TOCstart;
11294
11295 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11296 order. The TOC starts where the first of these sections starts. */
11297 s = bfd_get_section_by_name (obfd, ".got");
11298 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11299 s = bfd_get_section_by_name (obfd, ".toc");
11300 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11301 s = bfd_get_section_by_name (obfd, ".tocbss");
11302 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11303 s = bfd_get_section_by_name (obfd, ".plt");
11304 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11305 {
11306 /* This may happen for
11307 o references to TOC base (SYM@toc / TOC[tc0]) without a
11308 .toc directive
11309 o bad linker script
11310 o --gc-sections and empty TOC sections
11311
11312 FIXME: Warn user? */
11313
11314 /* Look for a likely section. We probably won't even be
11315 using TOCstart. */
11316 for (s = obfd->sections; s != NULL; s = s->next)
11317 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11318 | SEC_EXCLUDE))
11319 == (SEC_ALLOC | SEC_SMALL_DATA))
11320 break;
11321 if (s == NULL)
11322 for (s = obfd->sections; s != NULL; s = s->next)
11323 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11324 == (SEC_ALLOC | SEC_SMALL_DATA))
11325 break;
11326 if (s == NULL)
11327 for (s = obfd->sections; s != NULL; s = s->next)
11328 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11329 == SEC_ALLOC)
11330 break;
11331 if (s == NULL)
11332 for (s = obfd->sections; s != NULL; s = s->next)
11333 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11334 break;
11335 }
11336
11337 TOCstart = 0;
11338 if (s != NULL)
11339 TOCstart = s->output_section->vma + s->output_offset;
11340
11341 return TOCstart;
11342 }
11343
11344 /* Build all the stubs associated with the current output file.
11345 The stubs are kept in a hash table attached to the main linker
11346 hash table. This function is called via gldelf64ppc_finish. */
11347
11348 bfd_boolean
11349 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11350 struct bfd_link_info *info,
11351 char **stats)
11352 {
11353 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11354 asection *stub_sec;
11355 bfd_byte *p;
11356 int stub_sec_count = 0;
11357
11358 if (htab == NULL)
11359 return FALSE;
11360
11361 htab->emit_stub_syms = emit_stub_syms;
11362
11363 /* Allocate memory to hold the linker stubs. */
11364 for (stub_sec = htab->stub_bfd->sections;
11365 stub_sec != NULL;
11366 stub_sec = stub_sec->next)
11367 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11368 && stub_sec->size != 0)
11369 {
11370 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11371 if (stub_sec->contents == NULL)
11372 return FALSE;
11373 /* We want to check that built size is the same as calculated
11374 size. rawsize is a convenient location to use. */
11375 stub_sec->rawsize = stub_sec->size;
11376 stub_sec->size = 0;
11377 }
11378
11379 if (htab->glink != NULL && htab->glink->size != 0)
11380 {
11381 unsigned int indx;
11382 bfd_vma plt0;
11383
11384 /* Build the .glink plt call stub. */
11385 if (htab->emit_stub_syms)
11386 {
11387 struct elf_link_hash_entry *h;
11388 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11389 TRUE, FALSE, FALSE);
11390 if (h == NULL)
11391 return FALSE;
11392 if (h->root.type == bfd_link_hash_new)
11393 {
11394 h->root.type = bfd_link_hash_defined;
11395 h->root.u.def.section = htab->glink;
11396 h->root.u.def.value = 8;
11397 h->ref_regular = 1;
11398 h->def_regular = 1;
11399 h->ref_regular_nonweak = 1;
11400 h->forced_local = 1;
11401 h->non_elf = 0;
11402 }
11403 }
11404 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11405 if (info->emitrelocations)
11406 {
11407 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11408 if (r == NULL)
11409 return FALSE;
11410 r->r_offset = (htab->glink->output_offset
11411 + htab->glink->output_section->vma);
11412 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11413 r->r_addend = plt0;
11414 }
11415 p = htab->glink->contents;
11416 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11417 bfd_put_64 (htab->glink->owner, plt0, p);
11418 p += 8;
11419 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11420 p += 4;
11421 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11422 p += 4;
11423 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11424 p += 4;
11425 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11426 p += 4;
11427 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11428 p += 4;
11429 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11430 p += 4;
11431 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11432 p += 4;
11433 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11434 p += 4;
11435 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11436 p += 4;
11437 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11438 p += 4;
11439 bfd_put_32 (htab->glink->owner, BCTR, p);
11440 p += 4;
11441 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11442 {
11443 bfd_put_32 (htab->glink->owner, NOP, p);
11444 p += 4;
11445 }
11446
11447 /* Build the .glink lazy link call stubs. */
11448 indx = 0;
11449 while (p < htab->glink->contents + htab->glink->size)
11450 {
11451 if (indx < 0x8000)
11452 {
11453 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11454 p += 4;
11455 }
11456 else
11457 {
11458 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11459 p += 4;
11460 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11461 p += 4;
11462 }
11463 bfd_put_32 (htab->glink->owner,
11464 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11465 indx++;
11466 p += 4;
11467 }
11468 htab->glink->rawsize = p - htab->glink->contents;
11469 }
11470
11471 if (htab->brlt->size != 0)
11472 {
11473 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11474 htab->brlt->size);
11475 if (htab->brlt->contents == NULL)
11476 return FALSE;
11477 }
11478 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11479 {
11480 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11481 htab->relbrlt->size);
11482 if (htab->relbrlt->contents == NULL)
11483 return FALSE;
11484 }
11485
11486 if (htab->glink_eh_frame != NULL
11487 && htab->glink_eh_frame->size != 0)
11488 {
11489 bfd_vma val;
11490
11491 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
11492 if (p == NULL)
11493 return FALSE;
11494 htab->glink_eh_frame->contents = p;
11495
11496 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11497
11498 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
11499 /* CIE length (rewrite in case little-endian). */
11500 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
11501 p += sizeof (glink_eh_frame_cie);
11502
11503 for (stub_sec = htab->stub_bfd->sections;
11504 stub_sec != NULL;
11505 stub_sec = stub_sec->next)
11506 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11507 {
11508 /* FDE length. */
11509 bfd_put_32 (htab->elf.dynobj, 16, p);
11510 p += 4;
11511 /* CIE pointer. */
11512 val = p - htab->glink_eh_frame->contents;
11513 bfd_put_32 (htab->elf.dynobj, val, p);
11514 p += 4;
11515 /* Offset to stub section. */
11516 val = (stub_sec->output_section->vma
11517 + stub_sec->output_offset);
11518 val -= (htab->glink_eh_frame->output_section->vma
11519 + htab->glink_eh_frame->output_offset);
11520 val -= p - htab->glink_eh_frame->contents;
11521 if (val + 0x80000000 > 0xffffffff)
11522 {
11523 info->callbacks->einfo
11524 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
11525 stub_sec->name);
11526 return FALSE;
11527 }
11528 bfd_put_32 (htab->elf.dynobj, val, p);
11529 p += 4;
11530 /* stub section size. */
11531 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
11532 p += 4;
11533 /* Augmentation. */
11534 p += 1;
11535 /* Pad. */
11536 p += 3;
11537 }
11538 if (htab->glink != NULL && htab->glink->size != 0)
11539 {
11540 /* FDE length. */
11541 bfd_put_32 (htab->elf.dynobj, 20, p);
11542 p += 4;
11543 /* CIE pointer. */
11544 val = p - htab->glink_eh_frame->contents;
11545 bfd_put_32 (htab->elf.dynobj, val, p);
11546 p += 4;
11547 /* Offset to .glink. */
11548 val = (htab->glink->output_section->vma
11549 + htab->glink->output_offset
11550 + 8);
11551 val -= (htab->glink_eh_frame->output_section->vma
11552 + htab->glink_eh_frame->output_offset);
11553 val -= p - htab->glink_eh_frame->contents;
11554 if (val + 0x80000000 > 0xffffffff)
11555 {
11556 info->callbacks->einfo
11557 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
11558 htab->glink->name);
11559 return FALSE;
11560 }
11561 bfd_put_32 (htab->elf.dynobj, val, p);
11562 p += 4;
11563 /* .glink size. */
11564 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
11565 p += 4;
11566 /* Augmentation. */
11567 p += 1;
11568
11569 *p++ = DW_CFA_advance_loc + 1;
11570 *p++ = DW_CFA_register;
11571 *p++ = 65;
11572 *p++ = 12;
11573 *p++ = DW_CFA_advance_loc + 4;
11574 *p++ = DW_CFA_restore_extended;
11575 *p++ = 65;
11576 }
11577 htab->glink_eh_frame->size = p - htab->glink_eh_frame->contents;
11578 }
11579
11580 /* Build the stubs as directed by the stub hash table. */
11581 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11582
11583 if (htab->relbrlt != NULL)
11584 htab->relbrlt->reloc_count = 0;
11585
11586 for (stub_sec = htab->stub_bfd->sections;
11587 stub_sec != NULL;
11588 stub_sec = stub_sec->next)
11589 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11590 {
11591 stub_sec_count += 1;
11592 if (stub_sec->rawsize != stub_sec->size)
11593 break;
11594 }
11595
11596 if (stub_sec != NULL
11597 || htab->glink->rawsize != htab->glink->size
11598 || (htab->glink_eh_frame != NULL
11599 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
11600 {
11601 htab->stub_error = TRUE;
11602 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
11603 }
11604
11605 if (htab->stub_error)
11606 return FALSE;
11607
11608 if (stats != NULL)
11609 {
11610 *stats = bfd_malloc (500);
11611 if (*stats == NULL)
11612 return FALSE;
11613
11614 sprintf (*stats, _("linker stubs in %u group%s\n"
11615 " branch %lu\n"
11616 " toc adjust %lu\n"
11617 " long branch %lu\n"
11618 " long toc adj %lu\n"
11619 " plt call %lu"),
11620 stub_sec_count,
11621 stub_sec_count == 1 ? "" : "s",
11622 htab->stub_count[ppc_stub_long_branch - 1],
11623 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11624 htab->stub_count[ppc_stub_plt_branch - 1],
11625 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11626 htab->stub_count[ppc_stub_plt_call - 1]);
11627 }
11628 return TRUE;
11629 }
11630
11631 /* This function undoes the changes made by add_symbol_adjust. */
11632
11633 static bfd_boolean
11634 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11635 {
11636 struct ppc_link_hash_entry *eh;
11637
11638 if (h->root.type == bfd_link_hash_indirect)
11639 return TRUE;
11640
11641 eh = (struct ppc_link_hash_entry *) h;
11642 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11643 return TRUE;
11644
11645 eh->elf.root.type = bfd_link_hash_undefined;
11646 return TRUE;
11647 }
11648
11649 void
11650 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11651 {
11652 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11653
11654 if (htab != NULL)
11655 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11656 }
11657
11658 /* What to do when ld finds relocations against symbols defined in
11659 discarded sections. */
11660
11661 static unsigned int
11662 ppc64_elf_action_discarded (asection *sec)
11663 {
11664 if (strcmp (".opd", sec->name) == 0)
11665 return 0;
11666
11667 if (strcmp (".toc", sec->name) == 0)
11668 return 0;
11669
11670 if (strcmp (".toc1", sec->name) == 0)
11671 return 0;
11672
11673 return _bfd_elf_default_action_discarded (sec);
11674 }
11675
11676 /* REL points to a low-part reloc on a largetoc instruction sequence.
11677 Find the matching high-part reloc instruction and verify that it
11678 is addis REG,x,imm. If so, set *REG to x and return a pointer to
11679 the high-part reloc. */
11680
11681 static const Elf_Internal_Rela *
11682 ha_reloc_match (const Elf_Internal_Rela *relocs,
11683 const Elf_Internal_Rela *rel,
11684 unsigned int *reg,
11685 bfd_boolean match_addend,
11686 const bfd *input_bfd,
11687 const bfd_byte *contents)
11688 {
11689 enum elf_ppc64_reloc_type r_type, r_type_ha;
11690 bfd_vma r_info_ha, r_addend;
11691
11692 r_type = ELF64_R_TYPE (rel->r_info);
11693 switch (r_type)
11694 {
11695 case R_PPC64_GOT_TLSLD16_LO:
11696 case R_PPC64_GOT_TLSGD16_LO:
11697 case R_PPC64_GOT_TPREL16_LO_DS:
11698 case R_PPC64_GOT_DTPREL16_LO_DS:
11699 case R_PPC64_GOT16_LO:
11700 case R_PPC64_TOC16_LO:
11701 r_type_ha = r_type + 2;
11702 break;
11703 case R_PPC64_GOT16_LO_DS:
11704 r_type_ha = R_PPC64_GOT16_HA;
11705 break;
11706 case R_PPC64_TOC16_LO_DS:
11707 r_type_ha = R_PPC64_TOC16_HA;
11708 break;
11709 default:
11710 abort ();
11711 }
11712 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11713 r_addend = rel->r_addend;
11714
11715 while (--rel >= relocs)
11716 if (rel->r_info == r_info_ha
11717 && (!match_addend
11718 || rel->r_addend == r_addend))
11719 {
11720 const bfd_byte *p = contents + (rel->r_offset & ~3);
11721 unsigned int insn = bfd_get_32 (input_bfd, p);
11722 if ((insn & (0x3f << 26)) == (15u << 26) /* addis rt,x,imm */
11723 && (insn & (0x1f << 21)) == (*reg << 21))
11724 {
11725 *reg = (insn >> 16) & 0x1f;
11726 return rel;
11727 }
11728 break;
11729 }
11730 return NULL;
11731 }
11732
11733 /* The RELOCATE_SECTION function is called by the ELF backend linker
11734 to handle the relocations for a section.
11735
11736 The relocs are always passed as Rela structures; if the section
11737 actually uses Rel structures, the r_addend field will always be
11738 zero.
11739
11740 This function is responsible for adjust the section contents as
11741 necessary, and (if using Rela relocs and generating a
11742 relocatable output file) adjusting the reloc addend as
11743 necessary.
11744
11745 This function does not have to worry about setting the reloc
11746 address or the reloc symbol index.
11747
11748 LOCAL_SYMS is a pointer to the swapped in local symbols.
11749
11750 LOCAL_SECTIONS is an array giving the section in the input file
11751 corresponding to the st_shndx field of each local symbol.
11752
11753 The global hash table entry for the global symbols can be found
11754 via elf_sym_hashes (input_bfd).
11755
11756 When generating relocatable output, this function must handle
11757 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11758 going to be the section symbol corresponding to the output
11759 section, which means that the addend must be adjusted
11760 accordingly. */
11761
11762 static bfd_boolean
11763 ppc64_elf_relocate_section (bfd *output_bfd,
11764 struct bfd_link_info *info,
11765 bfd *input_bfd,
11766 asection *input_section,
11767 bfd_byte *contents,
11768 Elf_Internal_Rela *relocs,
11769 Elf_Internal_Sym *local_syms,
11770 asection **local_sections)
11771 {
11772 struct ppc_link_hash_table *htab;
11773 Elf_Internal_Shdr *symtab_hdr;
11774 struct elf_link_hash_entry **sym_hashes;
11775 Elf_Internal_Rela *rel;
11776 Elf_Internal_Rela *relend;
11777 Elf_Internal_Rela outrel;
11778 bfd_byte *loc;
11779 struct got_entry **local_got_ents;
11780 unsigned char *ha_opt;
11781 bfd_vma TOCstart;
11782 bfd_boolean no_ha_opt;
11783 bfd_boolean ret = TRUE;
11784 bfd_boolean is_opd;
11785 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11786 bfd_boolean is_power4 = FALSE;
11787 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11788
11789 /* Initialize howto table if needed. */
11790 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11791 ppc_howto_init ();
11792
11793 htab = ppc_hash_table (info);
11794 if (htab == NULL)
11795 return FALSE;
11796
11797 /* Don't relocate stub sections. */
11798 if (input_section->owner == htab->stub_bfd)
11799 return TRUE;
11800
11801 BFD_ASSERT (is_ppc64_elf (input_bfd));
11802
11803 local_got_ents = elf_local_got_ents (input_bfd);
11804 TOCstart = elf_gp (output_bfd);
11805 symtab_hdr = &elf_symtab_hdr (input_bfd);
11806 sym_hashes = elf_sym_hashes (input_bfd);
11807 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11808 ha_opt = NULL;
11809 no_ha_opt = FALSE;
11810
11811 rel = relocs;
11812 relend = relocs + input_section->reloc_count;
11813 for (; rel < relend; rel++)
11814 {
11815 enum elf_ppc64_reloc_type r_type;
11816 bfd_vma addend, orig_addend;
11817 bfd_reloc_status_type r;
11818 Elf_Internal_Sym *sym;
11819 asection *sec;
11820 struct elf_link_hash_entry *h_elf;
11821 struct ppc_link_hash_entry *h;
11822 struct ppc_link_hash_entry *fdh;
11823 const char *sym_name;
11824 unsigned long r_symndx, toc_symndx;
11825 bfd_vma toc_addend;
11826 unsigned char tls_mask, tls_gd, tls_type;
11827 unsigned char sym_type;
11828 bfd_vma relocation;
11829 bfd_boolean unresolved_reloc;
11830 bfd_boolean warned;
11831 unsigned int insn;
11832 unsigned int mask;
11833 struct ppc_stub_hash_entry *stub_entry;
11834 bfd_vma max_br_offset;
11835 bfd_vma from;
11836
11837 r_type = ELF64_R_TYPE (rel->r_info);
11838 r_symndx = ELF64_R_SYM (rel->r_info);
11839
11840 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11841 symbol of the previous ADDR64 reloc. The symbol gives us the
11842 proper TOC base to use. */
11843 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11844 && rel != relocs
11845 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11846 && is_opd)
11847 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11848
11849 sym = NULL;
11850 sec = NULL;
11851 h_elf = NULL;
11852 sym_name = NULL;
11853 unresolved_reloc = FALSE;
11854 warned = FALSE;
11855 orig_addend = rel->r_addend;
11856
11857 if (r_symndx < symtab_hdr->sh_info)
11858 {
11859 /* It's a local symbol. */
11860 struct _opd_sec_data *opd;
11861
11862 sym = local_syms + r_symndx;
11863 sec = local_sections[r_symndx];
11864 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11865 sym_type = ELF64_ST_TYPE (sym->st_info);
11866 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11867 opd = get_opd_info (sec);
11868 if (opd != NULL && opd->adjust != NULL)
11869 {
11870 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11871 if (adjust == -1)
11872 relocation = 0;
11873 else
11874 {
11875 /* If this is a relocation against the opd section sym
11876 and we have edited .opd, adjust the reloc addend so
11877 that ld -r and ld --emit-relocs output is correct.
11878 If it is a reloc against some other .opd symbol,
11879 then the symbol value will be adjusted later. */
11880 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11881 rel->r_addend += adjust;
11882 else
11883 relocation += adjust;
11884 }
11885 }
11886 }
11887 else
11888 {
11889 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11890 r_symndx, symtab_hdr, sym_hashes,
11891 h_elf, sec, relocation,
11892 unresolved_reloc, warned);
11893 sym_name = h_elf->root.root.string;
11894 sym_type = h_elf->type;
11895 }
11896 h = (struct ppc_link_hash_entry *) h_elf;
11897
11898 if (sec != NULL && elf_discarded_section (sec))
11899 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
11900 rel, relend,
11901 ppc64_elf_howto_table[r_type],
11902 contents);
11903
11904 if (info->relocatable)
11905 continue;
11906
11907 /* TLS optimizations. Replace instruction sequences and relocs
11908 based on information we collected in tls_optimize. We edit
11909 RELOCS so that --emit-relocs will output something sensible
11910 for the final instruction stream. */
11911 tls_mask = 0;
11912 tls_gd = 0;
11913 toc_symndx = 0;
11914 if (h != NULL)
11915 tls_mask = h->tls_mask;
11916 else if (local_got_ents != NULL)
11917 {
11918 struct plt_entry **local_plt = (struct plt_entry **)
11919 (local_got_ents + symtab_hdr->sh_info);
11920 unsigned char *lgot_masks = (unsigned char *)
11921 (local_plt + symtab_hdr->sh_info);
11922 tls_mask = lgot_masks[r_symndx];
11923 }
11924 if (tls_mask == 0
11925 && (r_type == R_PPC64_TLS
11926 || r_type == R_PPC64_TLSGD
11927 || r_type == R_PPC64_TLSLD))
11928 {
11929 /* Check for toc tls entries. */
11930 unsigned char *toc_tls;
11931
11932 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11933 &local_syms, rel, input_bfd))
11934 return FALSE;
11935
11936 if (toc_tls)
11937 tls_mask = *toc_tls;
11938 }
11939
11940 /* Check that tls relocs are used with tls syms, and non-tls
11941 relocs are used with non-tls syms. */
11942 if (r_symndx != STN_UNDEF
11943 && r_type != R_PPC64_NONE
11944 && (h == NULL
11945 || h->elf.root.type == bfd_link_hash_defined
11946 || h->elf.root.type == bfd_link_hash_defweak)
11947 && (IS_PPC64_TLS_RELOC (r_type)
11948 != (sym_type == STT_TLS
11949 || (sym_type == STT_SECTION
11950 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11951 {
11952 if (tls_mask != 0
11953 && (r_type == R_PPC64_TLS
11954 || r_type == R_PPC64_TLSGD
11955 || r_type == R_PPC64_TLSLD))
11956 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11957 ;
11958 else
11959 info->callbacks->einfo
11960 (!IS_PPC64_TLS_RELOC (r_type)
11961 ? _("%P: %H: %s used with TLS symbol %s\n")
11962 : _("%P: %H: %s used with non-TLS symbol %s\n"),
11963 input_bfd, input_section, rel->r_offset,
11964 ppc64_elf_howto_table[r_type]->name,
11965 sym_name);
11966 }
11967
11968 /* Ensure reloc mapping code below stays sane. */
11969 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11970 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11971 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11972 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11973 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11974 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11975 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11976 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11977 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11978 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11979 abort ();
11980
11981 switch (r_type)
11982 {
11983 default:
11984 break;
11985
11986 case R_PPC64_LO_DS_OPT:
11987 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11988 if ((insn & (0x3f << 26)) != 58u << 26)
11989 abort ();
11990 insn += (14u << 26) - (58u << 26);
11991 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11992 r_type = R_PPC64_TOC16_LO;
11993 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11994 break;
11995
11996 case R_PPC64_TOC16:
11997 case R_PPC64_TOC16_LO:
11998 case R_PPC64_TOC16_DS:
11999 case R_PPC64_TOC16_LO_DS:
12000 {
12001 /* Check for toc tls entries. */
12002 unsigned char *toc_tls;
12003 int retval;
12004
12005 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12006 &local_syms, rel, input_bfd);
12007 if (retval == 0)
12008 return FALSE;
12009
12010 if (toc_tls)
12011 {
12012 tls_mask = *toc_tls;
12013 if (r_type == R_PPC64_TOC16_DS
12014 || r_type == R_PPC64_TOC16_LO_DS)
12015 {
12016 if (tls_mask != 0
12017 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12018 goto toctprel;
12019 }
12020 else
12021 {
12022 /* If we found a GD reloc pair, then we might be
12023 doing a GD->IE transition. */
12024 if (retval == 2)
12025 {
12026 tls_gd = TLS_TPRELGD;
12027 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12028 goto tls_ldgd_opt;
12029 }
12030 else if (retval == 3)
12031 {
12032 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12033 goto tls_ldgd_opt;
12034 }
12035 }
12036 }
12037 }
12038 break;
12039
12040 case R_PPC64_GOT_TPREL16_HI:
12041 case R_PPC64_GOT_TPREL16_HA:
12042 if (tls_mask != 0
12043 && (tls_mask & TLS_TPREL) == 0)
12044 {
12045 rel->r_offset -= d_offset;
12046 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12047 r_type = R_PPC64_NONE;
12048 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12049 }
12050 break;
12051
12052 case R_PPC64_GOT_TPREL16_DS:
12053 case R_PPC64_GOT_TPREL16_LO_DS:
12054 if (tls_mask != 0
12055 && (tls_mask & TLS_TPREL) == 0)
12056 {
12057 toctprel:
12058 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12059 insn &= 31 << 21;
12060 insn |= 0x3c0d0000; /* addis 0,13,0 */
12061 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12062 r_type = R_PPC64_TPREL16_HA;
12063 if (toc_symndx != 0)
12064 {
12065 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12066 rel->r_addend = toc_addend;
12067 /* We changed the symbol. Start over in order to
12068 get h, sym, sec etc. right. */
12069 rel--;
12070 continue;
12071 }
12072 else
12073 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12074 }
12075 break;
12076
12077 case R_PPC64_TLS:
12078 if (tls_mask != 0
12079 && (tls_mask & TLS_TPREL) == 0)
12080 {
12081 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12082 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12083 if (insn == 0)
12084 abort ();
12085 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12086 /* Was PPC64_TLS which sits on insn boundary, now
12087 PPC64_TPREL16_LO which is at low-order half-word. */
12088 rel->r_offset += d_offset;
12089 r_type = R_PPC64_TPREL16_LO;
12090 if (toc_symndx != 0)
12091 {
12092 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12093 rel->r_addend = toc_addend;
12094 /* We changed the symbol. Start over in order to
12095 get h, sym, sec etc. right. */
12096 rel--;
12097 continue;
12098 }
12099 else
12100 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12101 }
12102 break;
12103
12104 case R_PPC64_GOT_TLSGD16_HI:
12105 case R_PPC64_GOT_TLSGD16_HA:
12106 tls_gd = TLS_TPRELGD;
12107 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12108 goto tls_gdld_hi;
12109 break;
12110
12111 case R_PPC64_GOT_TLSLD16_HI:
12112 case R_PPC64_GOT_TLSLD16_HA:
12113 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12114 {
12115 tls_gdld_hi:
12116 if ((tls_mask & tls_gd) != 0)
12117 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12118 + R_PPC64_GOT_TPREL16_DS);
12119 else
12120 {
12121 rel->r_offset -= d_offset;
12122 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12123 r_type = R_PPC64_NONE;
12124 }
12125 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12126 }
12127 break;
12128
12129 case R_PPC64_GOT_TLSGD16:
12130 case R_PPC64_GOT_TLSGD16_LO:
12131 tls_gd = TLS_TPRELGD;
12132 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12133 goto tls_ldgd_opt;
12134 break;
12135
12136 case R_PPC64_GOT_TLSLD16:
12137 case R_PPC64_GOT_TLSLD16_LO:
12138 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12139 {
12140 unsigned int insn1, insn2, insn3;
12141 bfd_vma offset;
12142
12143 tls_ldgd_opt:
12144 offset = (bfd_vma) -1;
12145 /* If not using the newer R_PPC64_TLSGD/LD to mark
12146 __tls_get_addr calls, we must trust that the call
12147 stays with its arg setup insns, ie. that the next
12148 reloc is the __tls_get_addr call associated with
12149 the current reloc. Edit both insns. */
12150 if (input_section->has_tls_get_addr_call
12151 && rel + 1 < relend
12152 && branch_reloc_hash_match (input_bfd, rel + 1,
12153 htab->tls_get_addr,
12154 htab->tls_get_addr_fd))
12155 offset = rel[1].r_offset;
12156 if ((tls_mask & tls_gd) != 0)
12157 {
12158 /* IE */
12159 insn1 = bfd_get_32 (output_bfd,
12160 contents + rel->r_offset - d_offset);
12161 insn1 &= (1 << 26) - (1 << 2);
12162 insn1 |= 58 << 26; /* ld */
12163 insn2 = 0x7c636a14; /* add 3,3,13 */
12164 if (offset != (bfd_vma) -1)
12165 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12166 if ((tls_mask & TLS_EXPLICIT) == 0)
12167 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12168 + R_PPC64_GOT_TPREL16_DS);
12169 else
12170 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12171 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12172 }
12173 else
12174 {
12175 /* LE */
12176 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12177 insn2 = 0x38630000; /* addi 3,3,0 */
12178 if (tls_gd == 0)
12179 {
12180 /* Was an LD reloc. */
12181 if (toc_symndx)
12182 sec = local_sections[toc_symndx];
12183 for (r_symndx = 0;
12184 r_symndx < symtab_hdr->sh_info;
12185 r_symndx++)
12186 if (local_sections[r_symndx] == sec)
12187 break;
12188 if (r_symndx >= symtab_hdr->sh_info)
12189 r_symndx = STN_UNDEF;
12190 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12191 if (r_symndx != STN_UNDEF)
12192 rel->r_addend -= (local_syms[r_symndx].st_value
12193 + sec->output_offset
12194 + sec->output_section->vma);
12195 }
12196 else if (toc_symndx != 0)
12197 {
12198 r_symndx = toc_symndx;
12199 rel->r_addend = toc_addend;
12200 }
12201 r_type = R_PPC64_TPREL16_HA;
12202 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12203 if (offset != (bfd_vma) -1)
12204 {
12205 rel[1].r_info = ELF64_R_INFO (r_symndx,
12206 R_PPC64_TPREL16_LO);
12207 rel[1].r_offset = offset + d_offset;
12208 rel[1].r_addend = rel->r_addend;
12209 }
12210 }
12211 bfd_put_32 (output_bfd, insn1,
12212 contents + rel->r_offset - d_offset);
12213 if (offset != (bfd_vma) -1)
12214 {
12215 insn3 = bfd_get_32 (output_bfd,
12216 contents + offset + 4);
12217 if (insn3 == NOP
12218 || insn3 == CROR_151515 || insn3 == CROR_313131)
12219 {
12220 rel[1].r_offset += 4;
12221 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12222 insn2 = NOP;
12223 }
12224 bfd_put_32 (output_bfd, insn2, contents + offset);
12225 }
12226 if ((tls_mask & tls_gd) == 0
12227 && (tls_gd == 0 || toc_symndx != 0))
12228 {
12229 /* We changed the symbol. Start over in order
12230 to get h, sym, sec etc. right. */
12231 rel--;
12232 continue;
12233 }
12234 }
12235 break;
12236
12237 case R_PPC64_TLSGD:
12238 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12239 {
12240 unsigned int insn2, insn3;
12241 bfd_vma offset = rel->r_offset;
12242
12243 if ((tls_mask & TLS_TPRELGD) != 0)
12244 {
12245 /* IE */
12246 r_type = R_PPC64_NONE;
12247 insn2 = 0x7c636a14; /* add 3,3,13 */
12248 }
12249 else
12250 {
12251 /* LE */
12252 if (toc_symndx != 0)
12253 {
12254 r_symndx = toc_symndx;
12255 rel->r_addend = toc_addend;
12256 }
12257 r_type = R_PPC64_TPREL16_LO;
12258 rel->r_offset = offset + d_offset;
12259 insn2 = 0x38630000; /* addi 3,3,0 */
12260 }
12261 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12262 /* Zap the reloc on the _tls_get_addr call too. */
12263 BFD_ASSERT (offset == rel[1].r_offset);
12264 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12265 insn3 = bfd_get_32 (output_bfd,
12266 contents + offset + 4);
12267 if (insn3 == NOP
12268 || insn3 == CROR_151515 || insn3 == CROR_313131)
12269 {
12270 rel->r_offset += 4;
12271 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12272 insn2 = NOP;
12273 }
12274 bfd_put_32 (output_bfd, insn2, contents + offset);
12275 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12276 {
12277 rel--;
12278 continue;
12279 }
12280 }
12281 break;
12282
12283 case R_PPC64_TLSLD:
12284 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12285 {
12286 unsigned int insn2, insn3;
12287 bfd_vma offset = rel->r_offset;
12288
12289 if (toc_symndx)
12290 sec = local_sections[toc_symndx];
12291 for (r_symndx = 0;
12292 r_symndx < symtab_hdr->sh_info;
12293 r_symndx++)
12294 if (local_sections[r_symndx] == sec)
12295 break;
12296 if (r_symndx >= symtab_hdr->sh_info)
12297 r_symndx = STN_UNDEF;
12298 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12299 if (r_symndx != STN_UNDEF)
12300 rel->r_addend -= (local_syms[r_symndx].st_value
12301 + sec->output_offset
12302 + sec->output_section->vma);
12303
12304 r_type = R_PPC64_TPREL16_LO;
12305 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12306 rel->r_offset = offset + d_offset;
12307 /* Zap the reloc on the _tls_get_addr call too. */
12308 BFD_ASSERT (offset == rel[1].r_offset);
12309 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12310 insn2 = 0x38630000; /* addi 3,3,0 */
12311 insn3 = bfd_get_32 (output_bfd,
12312 contents + offset + 4);
12313 if (insn3 == NOP
12314 || insn3 == CROR_151515 || insn3 == CROR_313131)
12315 {
12316 rel->r_offset += 4;
12317 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12318 insn2 = NOP;
12319 }
12320 bfd_put_32 (output_bfd, insn2, contents + offset);
12321 rel--;
12322 continue;
12323 }
12324 break;
12325
12326 case R_PPC64_DTPMOD64:
12327 if (rel + 1 < relend
12328 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12329 && rel[1].r_offset == rel->r_offset + 8)
12330 {
12331 if ((tls_mask & TLS_GD) == 0)
12332 {
12333 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12334 if ((tls_mask & TLS_TPRELGD) != 0)
12335 r_type = R_PPC64_TPREL64;
12336 else
12337 {
12338 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12339 r_type = R_PPC64_NONE;
12340 }
12341 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12342 }
12343 }
12344 else
12345 {
12346 if ((tls_mask & TLS_LD) == 0)
12347 {
12348 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12349 r_type = R_PPC64_NONE;
12350 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12351 }
12352 }
12353 break;
12354
12355 case R_PPC64_TPREL64:
12356 if ((tls_mask & TLS_TPREL) == 0)
12357 {
12358 r_type = R_PPC64_NONE;
12359 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12360 }
12361 break;
12362 }
12363
12364 /* Handle other relocations that tweak non-addend part of insn. */
12365 insn = 0;
12366 max_br_offset = 1 << 25;
12367 addend = rel->r_addend;
12368 switch (r_type)
12369 {
12370 default:
12371 break;
12372
12373 /* Branch taken prediction relocations. */
12374 case R_PPC64_ADDR14_BRTAKEN:
12375 case R_PPC64_REL14_BRTAKEN:
12376 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12377 /* Fall thru. */
12378
12379 /* Branch not taken prediction relocations. */
12380 case R_PPC64_ADDR14_BRNTAKEN:
12381 case R_PPC64_REL14_BRNTAKEN:
12382 insn |= bfd_get_32 (output_bfd,
12383 contents + rel->r_offset) & ~(0x01 << 21);
12384 /* Fall thru. */
12385
12386 case R_PPC64_REL14:
12387 max_br_offset = 1 << 15;
12388 /* Fall thru. */
12389
12390 case R_PPC64_REL24:
12391 /* Calls to functions with a different TOC, such as calls to
12392 shared objects, need to alter the TOC pointer. This is
12393 done using a linkage stub. A REL24 branching to these
12394 linkage stubs needs to be followed by a nop, as the nop
12395 will be replaced with an instruction to restore the TOC
12396 base pointer. */
12397 fdh = h;
12398 if (h != NULL
12399 && h->oh != NULL
12400 && h->oh->is_func_descriptor)
12401 fdh = ppc_follow_link (h->oh);
12402 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12403 if (stub_entry != NULL
12404 && (stub_entry->stub_type == ppc_stub_plt_call
12405 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12406 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12407 {
12408 bfd_boolean can_plt_call = FALSE;
12409
12410 if (rel->r_offset + 8 <= input_section->size)
12411 {
12412 unsigned long nop;
12413 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12414 if (nop == NOP
12415 || nop == CROR_151515 || nop == CROR_313131)
12416 {
12417 if (h != NULL
12418 && (h == htab->tls_get_addr_fd
12419 || h == htab->tls_get_addr)
12420 && !htab->no_tls_get_addr_opt)
12421 {
12422 /* Special stub used, leave nop alone. */
12423 }
12424 else
12425 bfd_put_32 (input_bfd, LD_R2_40R1,
12426 contents + rel->r_offset + 4);
12427 can_plt_call = TRUE;
12428 }
12429 }
12430
12431 if (!can_plt_call)
12432 {
12433 if (stub_entry->stub_type == ppc_stub_plt_call)
12434 {
12435 /* If this is a plain branch rather than a branch
12436 and link, don't require a nop. However, don't
12437 allow tail calls in a shared library as they
12438 will result in r2 being corrupted. */
12439 unsigned long br;
12440 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12441 if (info->executable && (br & 1) == 0)
12442 can_plt_call = TRUE;
12443 else
12444 stub_entry = NULL;
12445 }
12446 else if (h != NULL
12447 && strcmp (h->elf.root.root.string,
12448 ".__libc_start_main") == 0)
12449 {
12450 /* Allow crt1 branch to go via a toc adjusting stub. */
12451 can_plt_call = TRUE;
12452 }
12453 else
12454 {
12455 if (strcmp (input_section->output_section->name,
12456 ".init") == 0
12457 || strcmp (input_section->output_section->name,
12458 ".fini") == 0)
12459 info->callbacks->einfo
12460 (_("%P: %H: automatic multiple TOCs "
12461 "not supported using your crt files; "
12462 "recompile with -mminimal-toc or upgrade gcc\n"),
12463 input_bfd, input_section, rel->r_offset);
12464 else
12465 info->callbacks->einfo
12466 (_("%P: %H: sibling call optimization to `%s' "
12467 "does not allow automatic multiple TOCs; "
12468 "recompile with -mminimal-toc or "
12469 "-fno-optimize-sibling-calls, "
12470 "or make `%s' extern\n"),
12471 input_bfd, input_section, rel->r_offset,
12472 sym_name,
12473 sym_name);
12474 bfd_set_error (bfd_error_bad_value);
12475 ret = FALSE;
12476 }
12477 }
12478
12479 if (can_plt_call
12480 && stub_entry->stub_type == ppc_stub_plt_call)
12481 unresolved_reloc = FALSE;
12482 }
12483
12484 if ((stub_entry == NULL
12485 || stub_entry->stub_type == ppc_stub_long_branch
12486 || stub_entry->stub_type == ppc_stub_plt_branch)
12487 && get_opd_info (sec) != NULL)
12488 {
12489 /* The branch destination is the value of the opd entry. */
12490 bfd_vma off = (relocation + addend
12491 - sec->output_section->vma
12492 - sec->output_offset);
12493 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12494 if (dest != (bfd_vma) -1)
12495 {
12496 relocation = dest;
12497 addend = 0;
12498 }
12499 }
12500
12501 /* If the branch is out of reach we ought to have a long
12502 branch stub. */
12503 from = (rel->r_offset
12504 + input_section->output_offset
12505 + input_section->output_section->vma);
12506
12507 if (stub_entry != NULL
12508 && (stub_entry->stub_type == ppc_stub_long_branch
12509 || stub_entry->stub_type == ppc_stub_plt_branch)
12510 && (r_type == R_PPC64_ADDR14_BRTAKEN
12511 || r_type == R_PPC64_ADDR14_BRNTAKEN
12512 || (relocation + addend - from + max_br_offset
12513 < 2 * max_br_offset)))
12514 /* Don't use the stub if this branch is in range. */
12515 stub_entry = NULL;
12516
12517 if (stub_entry != NULL)
12518 {
12519 /* Munge up the value and addend so that we call the stub
12520 rather than the procedure directly. */
12521 relocation = (stub_entry->stub_offset
12522 + stub_entry->stub_sec->output_offset
12523 + stub_entry->stub_sec->output_section->vma);
12524 addend = 0;
12525 }
12526
12527 if (insn != 0)
12528 {
12529 if (is_power4)
12530 {
12531 /* Set 'a' bit. This is 0b00010 in BO field for branch
12532 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12533 for branch on CTR insns (BO == 1a00t or 1a01t). */
12534 if ((insn & (0x14 << 21)) == (0x04 << 21))
12535 insn |= 0x02 << 21;
12536 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12537 insn |= 0x08 << 21;
12538 else
12539 break;
12540 }
12541 else
12542 {
12543 /* Invert 'y' bit if not the default. */
12544 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12545 insn ^= 0x01 << 21;
12546 }
12547
12548 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12549 }
12550
12551 /* NOP out calls to undefined weak functions.
12552 We can thus call a weak function without first
12553 checking whether the function is defined. */
12554 else if (h != NULL
12555 && h->elf.root.type == bfd_link_hash_undefweak
12556 && h->elf.dynindx == -1
12557 && r_type == R_PPC64_REL24
12558 && relocation == 0
12559 && addend == 0)
12560 {
12561 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12562 continue;
12563 }
12564 break;
12565 }
12566
12567 /* Set `addend'. */
12568 tls_type = 0;
12569 switch (r_type)
12570 {
12571 default:
12572 info->callbacks->einfo
12573 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
12574 input_bfd, (int) r_type, sym_name);
12575
12576 bfd_set_error (bfd_error_bad_value);
12577 ret = FALSE;
12578 continue;
12579
12580 case R_PPC64_NONE:
12581 case R_PPC64_TLS:
12582 case R_PPC64_TLSGD:
12583 case R_PPC64_TLSLD:
12584 case R_PPC64_GNU_VTINHERIT:
12585 case R_PPC64_GNU_VTENTRY:
12586 continue;
12587
12588 /* GOT16 relocations. Like an ADDR16 using the symbol's
12589 address in the GOT as relocation value instead of the
12590 symbol's value itself. Also, create a GOT entry for the
12591 symbol and put the symbol value there. */
12592 case R_PPC64_GOT_TLSGD16:
12593 case R_PPC64_GOT_TLSGD16_LO:
12594 case R_PPC64_GOT_TLSGD16_HI:
12595 case R_PPC64_GOT_TLSGD16_HA:
12596 tls_type = TLS_TLS | TLS_GD;
12597 goto dogot;
12598
12599 case R_PPC64_GOT_TLSLD16:
12600 case R_PPC64_GOT_TLSLD16_LO:
12601 case R_PPC64_GOT_TLSLD16_HI:
12602 case R_PPC64_GOT_TLSLD16_HA:
12603 tls_type = TLS_TLS | TLS_LD;
12604 goto dogot;
12605
12606 case R_PPC64_GOT_TPREL16_DS:
12607 case R_PPC64_GOT_TPREL16_LO_DS:
12608 case R_PPC64_GOT_TPREL16_HI:
12609 case R_PPC64_GOT_TPREL16_HA:
12610 tls_type = TLS_TLS | TLS_TPREL;
12611 goto dogot;
12612
12613 case R_PPC64_GOT_DTPREL16_DS:
12614 case R_PPC64_GOT_DTPREL16_LO_DS:
12615 case R_PPC64_GOT_DTPREL16_HI:
12616 case R_PPC64_GOT_DTPREL16_HA:
12617 tls_type = TLS_TLS | TLS_DTPREL;
12618 goto dogot;
12619
12620 case R_PPC64_GOT16:
12621 case R_PPC64_GOT16_LO:
12622 case R_PPC64_GOT16_HI:
12623 case R_PPC64_GOT16_HA:
12624 case R_PPC64_GOT16_DS:
12625 case R_PPC64_GOT16_LO_DS:
12626 dogot:
12627 {
12628 /* Relocation is to the entry for this symbol in the global
12629 offset table. */
12630 asection *got;
12631 bfd_vma *offp;
12632 bfd_vma off;
12633 unsigned long indx = 0;
12634 struct got_entry *ent;
12635
12636 if (tls_type == (TLS_TLS | TLS_LD)
12637 && (h == NULL
12638 || !h->elf.def_dynamic))
12639 ent = ppc64_tlsld_got (input_bfd);
12640 else
12641 {
12642
12643 if (h != NULL)
12644 {
12645 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12646 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12647 &h->elf)
12648 || (info->shared
12649 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
12650 /* This is actually a static link, or it is a
12651 -Bsymbolic link and the symbol is defined
12652 locally, or the symbol was forced to be local
12653 because of a version file. */
12654 ;
12655 else
12656 {
12657 indx = h->elf.dynindx;
12658 unresolved_reloc = FALSE;
12659 }
12660 ent = h->elf.got.glist;
12661 }
12662 else
12663 {
12664 if (local_got_ents == NULL)
12665 abort ();
12666 ent = local_got_ents[r_symndx];
12667 }
12668
12669 for (; ent != NULL; ent = ent->next)
12670 if (ent->addend == orig_addend
12671 && ent->owner == input_bfd
12672 && ent->tls_type == tls_type)
12673 break;
12674 }
12675
12676 if (ent == NULL)
12677 abort ();
12678 if (ent->is_indirect)
12679 ent = ent->got.ent;
12680 offp = &ent->got.offset;
12681 got = ppc64_elf_tdata (ent->owner)->got;
12682 if (got == NULL)
12683 abort ();
12684
12685 /* The offset must always be a multiple of 8. We use the
12686 least significant bit to record whether we have already
12687 processed this entry. */
12688 off = *offp;
12689 if ((off & 1) != 0)
12690 off &= ~1;
12691 else
12692 {
12693 /* Generate relocs for the dynamic linker, except in
12694 the case of TLSLD where we'll use one entry per
12695 module. */
12696 asection *relgot;
12697 bfd_boolean ifunc;
12698
12699 *offp = off | 1;
12700 relgot = NULL;
12701 ifunc = (h != NULL
12702 ? h->elf.type == STT_GNU_IFUNC
12703 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12704 if ((info->shared || indx != 0)
12705 && (h == NULL
12706 || (tls_type == (TLS_TLS | TLS_LD)
12707 && !h->elf.def_dynamic)
12708 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12709 || h->elf.root.type != bfd_link_hash_undefweak))
12710 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12711 else if (ifunc)
12712 relgot = htab->reliplt;
12713 if (relgot != NULL)
12714 {
12715 outrel.r_offset = (got->output_section->vma
12716 + got->output_offset
12717 + off);
12718 outrel.r_addend = addend;
12719 if (tls_type & (TLS_LD | TLS_GD))
12720 {
12721 outrel.r_addend = 0;
12722 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12723 if (tls_type == (TLS_TLS | TLS_GD))
12724 {
12725 loc = relgot->contents;
12726 loc += (relgot->reloc_count++
12727 * sizeof (Elf64_External_Rela));
12728 bfd_elf64_swap_reloca_out (output_bfd,
12729 &outrel, loc);
12730 outrel.r_offset += 8;
12731 outrel.r_addend = addend;
12732 outrel.r_info
12733 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12734 }
12735 }
12736 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12737 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12738 else if (tls_type == (TLS_TLS | TLS_TPREL))
12739 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12740 else if (indx != 0)
12741 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12742 else
12743 {
12744 if (ifunc)
12745 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12746 else
12747 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12748
12749 /* Write the .got section contents for the sake
12750 of prelink. */
12751 loc = got->contents + off;
12752 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12753 loc);
12754 }
12755
12756 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12757 {
12758 outrel.r_addend += relocation;
12759 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12760 outrel.r_addend -= htab->elf.tls_sec->vma;
12761 }
12762 loc = relgot->contents;
12763 loc += (relgot->reloc_count++
12764 * sizeof (Elf64_External_Rela));
12765 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12766 }
12767
12768 /* Init the .got section contents here if we're not
12769 emitting a reloc. */
12770 else
12771 {
12772 relocation += addend;
12773 if (tls_type == (TLS_TLS | TLS_LD))
12774 relocation = 1;
12775 else if (tls_type != 0)
12776 {
12777 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12778 if (tls_type == (TLS_TLS | TLS_TPREL))
12779 relocation += DTP_OFFSET - TP_OFFSET;
12780
12781 if (tls_type == (TLS_TLS | TLS_GD))
12782 {
12783 bfd_put_64 (output_bfd, relocation,
12784 got->contents + off + 8);
12785 relocation = 1;
12786 }
12787 }
12788
12789 bfd_put_64 (output_bfd, relocation,
12790 got->contents + off);
12791 }
12792 }
12793
12794 if (off >= (bfd_vma) -2)
12795 abort ();
12796
12797 relocation = got->output_section->vma + got->output_offset + off;
12798 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12799 }
12800 break;
12801
12802 case R_PPC64_PLT16_HA:
12803 case R_PPC64_PLT16_HI:
12804 case R_PPC64_PLT16_LO:
12805 case R_PPC64_PLT32:
12806 case R_PPC64_PLT64:
12807 /* Relocation is to the entry for this symbol in the
12808 procedure linkage table. */
12809
12810 /* Resolve a PLT reloc against a local symbol directly,
12811 without using the procedure linkage table. */
12812 if (h == NULL)
12813 break;
12814
12815 /* It's possible that we didn't make a PLT entry for this
12816 symbol. This happens when statically linking PIC code,
12817 or when using -Bsymbolic. Go find a match if there is a
12818 PLT entry. */
12819 if (htab->plt != NULL)
12820 {
12821 struct plt_entry *ent;
12822 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12823 if (ent->addend == orig_addend
12824 && ent->plt.offset != (bfd_vma) -1)
12825 {
12826 relocation = (htab->plt->output_section->vma
12827 + htab->plt->output_offset
12828 + ent->plt.offset);
12829 unresolved_reloc = FALSE;
12830 }
12831 }
12832 break;
12833
12834 case R_PPC64_TOC:
12835 /* Relocation value is TOC base. */
12836 relocation = TOCstart;
12837 if (r_symndx == STN_UNDEF)
12838 relocation += htab->stub_group[input_section->id].toc_off;
12839 else if (unresolved_reloc)
12840 ;
12841 else if (sec != NULL && sec->id <= htab->top_id)
12842 relocation += htab->stub_group[sec->id].toc_off;
12843 else
12844 unresolved_reloc = TRUE;
12845 goto dodyn;
12846
12847 /* TOC16 relocs. We want the offset relative to the TOC base,
12848 which is the address of the start of the TOC plus 0x8000.
12849 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12850 in this order. */
12851 case R_PPC64_TOC16:
12852 case R_PPC64_TOC16_LO:
12853 case R_PPC64_TOC16_HI:
12854 case R_PPC64_TOC16_DS:
12855 case R_PPC64_TOC16_LO_DS:
12856 case R_PPC64_TOC16_HA:
12857 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12858 break;
12859
12860 /* Relocate against the beginning of the section. */
12861 case R_PPC64_SECTOFF:
12862 case R_PPC64_SECTOFF_LO:
12863 case R_PPC64_SECTOFF_HI:
12864 case R_PPC64_SECTOFF_DS:
12865 case R_PPC64_SECTOFF_LO_DS:
12866 case R_PPC64_SECTOFF_HA:
12867 if (sec != NULL)
12868 addend -= sec->output_section->vma;
12869 break;
12870
12871 case R_PPC64_REL16:
12872 case R_PPC64_REL16_LO:
12873 case R_PPC64_REL16_HI:
12874 case R_PPC64_REL16_HA:
12875 break;
12876
12877 case R_PPC64_REL14:
12878 case R_PPC64_REL14_BRNTAKEN:
12879 case R_PPC64_REL14_BRTAKEN:
12880 case R_PPC64_REL24:
12881 break;
12882
12883 case R_PPC64_TPREL16:
12884 case R_PPC64_TPREL16_LO:
12885 case R_PPC64_TPREL16_HI:
12886 case R_PPC64_TPREL16_HA:
12887 case R_PPC64_TPREL16_DS:
12888 case R_PPC64_TPREL16_LO_DS:
12889 case R_PPC64_TPREL16_HIGHER:
12890 case R_PPC64_TPREL16_HIGHERA:
12891 case R_PPC64_TPREL16_HIGHEST:
12892 case R_PPC64_TPREL16_HIGHESTA:
12893 if (h != NULL
12894 && h->elf.root.type == bfd_link_hash_undefweak
12895 && h->elf.dynindx == -1)
12896 {
12897 /* Make this relocation against an undefined weak symbol
12898 resolve to zero. This is really just a tweak, since
12899 code using weak externs ought to check that they are
12900 defined before using them. */
12901 bfd_byte *p = contents + rel->r_offset - d_offset;
12902
12903 insn = bfd_get_32 (output_bfd, p);
12904 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12905 if (insn != 0)
12906 bfd_put_32 (output_bfd, insn, p);
12907 break;
12908 }
12909 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12910 if (info->shared)
12911 /* The TPREL16 relocs shouldn't really be used in shared
12912 libs as they will result in DT_TEXTREL being set, but
12913 support them anyway. */
12914 goto dodyn;
12915 break;
12916
12917 case R_PPC64_DTPREL16:
12918 case R_PPC64_DTPREL16_LO:
12919 case R_PPC64_DTPREL16_HI:
12920 case R_PPC64_DTPREL16_HA:
12921 case R_PPC64_DTPREL16_DS:
12922 case R_PPC64_DTPREL16_LO_DS:
12923 case R_PPC64_DTPREL16_HIGHER:
12924 case R_PPC64_DTPREL16_HIGHERA:
12925 case R_PPC64_DTPREL16_HIGHEST:
12926 case R_PPC64_DTPREL16_HIGHESTA:
12927 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12928 break;
12929
12930 case R_PPC64_DTPMOD64:
12931 relocation = 1;
12932 addend = 0;
12933 goto dodyn;
12934
12935 case R_PPC64_TPREL64:
12936 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12937 goto dodyn;
12938
12939 case R_PPC64_DTPREL64:
12940 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12941 /* Fall thru */
12942
12943 /* Relocations that may need to be propagated if this is a
12944 dynamic object. */
12945 case R_PPC64_REL30:
12946 case R_PPC64_REL32:
12947 case R_PPC64_REL64:
12948 case R_PPC64_ADDR14:
12949 case R_PPC64_ADDR14_BRNTAKEN:
12950 case R_PPC64_ADDR14_BRTAKEN:
12951 case R_PPC64_ADDR16:
12952 case R_PPC64_ADDR16_DS:
12953 case R_PPC64_ADDR16_HA:
12954 case R_PPC64_ADDR16_HI:
12955 case R_PPC64_ADDR16_HIGHER:
12956 case R_PPC64_ADDR16_HIGHERA:
12957 case R_PPC64_ADDR16_HIGHEST:
12958 case R_PPC64_ADDR16_HIGHESTA:
12959 case R_PPC64_ADDR16_LO:
12960 case R_PPC64_ADDR16_LO_DS:
12961 case R_PPC64_ADDR24:
12962 case R_PPC64_ADDR32:
12963 case R_PPC64_ADDR64:
12964 case R_PPC64_UADDR16:
12965 case R_PPC64_UADDR32:
12966 case R_PPC64_UADDR64:
12967 dodyn:
12968 if ((input_section->flags & SEC_ALLOC) == 0)
12969 break;
12970
12971 if (NO_OPD_RELOCS && is_opd)
12972 break;
12973
12974 if ((info->shared
12975 && (h == NULL
12976 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12977 || h->elf.root.type != bfd_link_hash_undefweak)
12978 && (must_be_dyn_reloc (info, r_type)
12979 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12980 || (ELIMINATE_COPY_RELOCS
12981 && !info->shared
12982 && h != NULL
12983 && h->elf.dynindx != -1
12984 && !h->elf.non_got_ref
12985 && !h->elf.def_regular)
12986 || (!info->shared
12987 && (h != NULL
12988 ? h->elf.type == STT_GNU_IFUNC
12989 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12990 {
12991 bfd_boolean skip, relocate;
12992 asection *sreloc;
12993 bfd_vma out_off;
12994
12995 /* When generating a dynamic object, these relocations
12996 are copied into the output file to be resolved at run
12997 time. */
12998
12999 skip = FALSE;
13000 relocate = FALSE;
13001
13002 out_off = _bfd_elf_section_offset (output_bfd, info,
13003 input_section, rel->r_offset);
13004 if (out_off == (bfd_vma) -1)
13005 skip = TRUE;
13006 else if (out_off == (bfd_vma) -2)
13007 skip = TRUE, relocate = TRUE;
13008 out_off += (input_section->output_section->vma
13009 + input_section->output_offset);
13010 outrel.r_offset = out_off;
13011 outrel.r_addend = rel->r_addend;
13012
13013 /* Optimize unaligned reloc use. */
13014 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13015 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13016 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13017 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13018 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13019 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13020 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13021 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13022 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13023
13024 if (skip)
13025 memset (&outrel, 0, sizeof outrel);
13026 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13027 && !is_opd
13028 && r_type != R_PPC64_TOC)
13029 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13030 else
13031 {
13032 /* This symbol is local, or marked to become local,
13033 or this is an opd section reloc which must point
13034 at a local function. */
13035 outrel.r_addend += relocation;
13036 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13037 {
13038 if (is_opd && h != NULL)
13039 {
13040 /* Lie about opd entries. This case occurs
13041 when building shared libraries and we
13042 reference a function in another shared
13043 lib. The same thing happens for a weak
13044 definition in an application that's
13045 overridden by a strong definition in a
13046 shared lib. (I believe this is a generic
13047 bug in binutils handling of weak syms.)
13048 In these cases we won't use the opd
13049 entry in this lib. */
13050 unresolved_reloc = FALSE;
13051 }
13052 if (!is_opd
13053 && r_type == R_PPC64_ADDR64
13054 && (h != NULL
13055 ? h->elf.type == STT_GNU_IFUNC
13056 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13057 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13058 else
13059 {
13060 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13061
13062 /* We need to relocate .opd contents for ld.so.
13063 Prelink also wants simple and consistent rules
13064 for relocs. This make all RELATIVE relocs have
13065 *r_offset equal to r_addend. */
13066 relocate = TRUE;
13067 }
13068 }
13069 else
13070 {
13071 long indx = 0;
13072
13073 if (h != NULL
13074 ? h->elf.type == STT_GNU_IFUNC
13075 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13076 {
13077 info->callbacks->einfo
13078 (_("%P: %H: relocation %s for indirect "
13079 "function %s unsupported\n"),
13080 input_bfd, input_section, rel->r_offset,
13081 ppc64_elf_howto_table[r_type]->name,
13082 sym_name);
13083 ret = FALSE;
13084 }
13085 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13086 ;
13087 else if (sec == NULL || sec->owner == NULL)
13088 {
13089 bfd_set_error (bfd_error_bad_value);
13090 return FALSE;
13091 }
13092 else
13093 {
13094 asection *osec;
13095
13096 osec = sec->output_section;
13097 indx = elf_section_data (osec)->dynindx;
13098
13099 if (indx == 0)
13100 {
13101 if ((osec->flags & SEC_READONLY) == 0
13102 && htab->elf.data_index_section != NULL)
13103 osec = htab->elf.data_index_section;
13104 else
13105 osec = htab->elf.text_index_section;
13106 indx = elf_section_data (osec)->dynindx;
13107 }
13108 BFD_ASSERT (indx != 0);
13109
13110 /* We are turning this relocation into one
13111 against a section symbol, so subtract out
13112 the output section's address but not the
13113 offset of the input section in the output
13114 section. */
13115 outrel.r_addend -= osec->vma;
13116 }
13117
13118 outrel.r_info = ELF64_R_INFO (indx, r_type);
13119 }
13120 }
13121
13122 sreloc = elf_section_data (input_section)->sreloc;
13123 if (!htab->elf.dynamic_sections_created)
13124 sreloc = htab->reliplt;
13125 if (sreloc == NULL)
13126 abort ();
13127
13128 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13129 >= sreloc->size)
13130 abort ();
13131 loc = sreloc->contents;
13132 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13133 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13134
13135 /* If this reloc is against an external symbol, it will
13136 be computed at runtime, so there's no need to do
13137 anything now. However, for the sake of prelink ensure
13138 that the section contents are a known value. */
13139 if (! relocate)
13140 {
13141 unresolved_reloc = FALSE;
13142 /* The value chosen here is quite arbitrary as ld.so
13143 ignores section contents except for the special
13144 case of .opd where the contents might be accessed
13145 before relocation. Choose zero, as that won't
13146 cause reloc overflow. */
13147 relocation = 0;
13148 addend = 0;
13149 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13150 to improve backward compatibility with older
13151 versions of ld. */
13152 if (r_type == R_PPC64_ADDR64)
13153 addend = outrel.r_addend;
13154 /* Adjust pc_relative relocs to have zero in *r_offset. */
13155 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13156 addend = (input_section->output_section->vma
13157 + input_section->output_offset
13158 + rel->r_offset);
13159 }
13160 }
13161 break;
13162
13163 case R_PPC64_COPY:
13164 case R_PPC64_GLOB_DAT:
13165 case R_PPC64_JMP_SLOT:
13166 case R_PPC64_JMP_IREL:
13167 case R_PPC64_RELATIVE:
13168 /* We shouldn't ever see these dynamic relocs in relocatable
13169 files. */
13170 /* Fall through. */
13171
13172 case R_PPC64_PLTGOT16:
13173 case R_PPC64_PLTGOT16_DS:
13174 case R_PPC64_PLTGOT16_HA:
13175 case R_PPC64_PLTGOT16_HI:
13176 case R_PPC64_PLTGOT16_LO:
13177 case R_PPC64_PLTGOT16_LO_DS:
13178 case R_PPC64_PLTREL32:
13179 case R_PPC64_PLTREL64:
13180 /* These ones haven't been implemented yet. */
13181
13182 info->callbacks->einfo
13183 (_("%P: %B: relocation %s is not supported for symbol %s\n"),
13184 input_bfd,
13185 ppc64_elf_howto_table[r_type]->name, sym_name);
13186
13187 bfd_set_error (bfd_error_invalid_operation);
13188 ret = FALSE;
13189 continue;
13190 }
13191
13192 /* Multi-instruction sequences that access the TOC can be
13193 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13194 to nop; addi rb,r2,x; */
13195 switch (r_type)
13196 {
13197 default:
13198 break;
13199
13200 case R_PPC64_GOT_TLSLD16_HI:
13201 case R_PPC64_GOT_TLSGD16_HI:
13202 case R_PPC64_GOT_TPREL16_HI:
13203 case R_PPC64_GOT_DTPREL16_HI:
13204 case R_PPC64_GOT16_HI:
13205 case R_PPC64_TOC16_HI:
13206 /* These relocs would only be useful if building up an
13207 offset to later add to r2, perhaps in an indexed
13208 addressing mode instruction. Don't try to optimize.
13209 Unfortunately, the possibility of someone building up an
13210 offset like this or even with the HA relocs, means that
13211 we need to check the high insn when optimizing the low
13212 insn. */
13213 break;
13214
13215 case R_PPC64_GOT_TLSLD16_HA:
13216 case R_PPC64_GOT_TLSGD16_HA:
13217 case R_PPC64_GOT_TPREL16_HA:
13218 case R_PPC64_GOT_DTPREL16_HA:
13219 case R_PPC64_GOT16_HA:
13220 case R_PPC64_TOC16_HA:
13221 /* nop is done later. */
13222 break;
13223
13224 case R_PPC64_GOT_TLSLD16_LO:
13225 case R_PPC64_GOT_TLSGD16_LO:
13226 case R_PPC64_GOT_TPREL16_LO_DS:
13227 case R_PPC64_GOT_DTPREL16_LO_DS:
13228 case R_PPC64_GOT16_LO:
13229 case R_PPC64_GOT16_LO_DS:
13230 case R_PPC64_TOC16_LO:
13231 case R_PPC64_TOC16_LO_DS:
13232 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
13233 {
13234 bfd_byte *p = contents + (rel->r_offset & ~3);
13235 insn = bfd_get_32 (input_bfd, p);
13236 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
13237 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
13238 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
13239 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
13240 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
13241 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
13242 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
13243 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
13244 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
13245 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
13246 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
13247 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
13248 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
13249 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
13250 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
13251 && (insn & 3) != 1)
13252 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
13253 && ((insn & 3) == 0 || (insn & 3) == 3)))
13254 {
13255 unsigned int reg = (insn >> 16) & 0x1f;
13256 const Elf_Internal_Rela *ha;
13257 bfd_boolean match_addend;
13258
13259 match_addend = (sym != NULL
13260 && ELF_ST_TYPE (sym->st_info) == STT_SECTION);
13261 ha = ha_reloc_match (relocs, rel, &reg, match_addend,
13262 input_bfd, contents);
13263 if (ha != NULL)
13264 {
13265 insn &= ~(0x1f << 16);
13266 insn |= reg << 16;
13267 bfd_put_32 (input_bfd, insn, p);
13268 if (ha_opt == NULL)
13269 {
13270 ha_opt = bfd_zmalloc (input_section->reloc_count);
13271 if (ha_opt == NULL)
13272 return FALSE;
13273 }
13274 ha_opt[ha - relocs] = 1;
13275 }
13276 else
13277 /* If we don't find a matching high part insn,
13278 something is fishy. Refuse to nop any high
13279 part insn in this section. */
13280 no_ha_opt = TRUE;
13281 }
13282 }
13283 break;
13284 }
13285
13286 /* Do any further special processing. */
13287 switch (r_type)
13288 {
13289 default:
13290 break;
13291
13292 case R_PPC64_ADDR16_HA:
13293 case R_PPC64_REL16_HA:
13294 case R_PPC64_ADDR16_HIGHERA:
13295 case R_PPC64_ADDR16_HIGHESTA:
13296 case R_PPC64_TOC16_HA:
13297 case R_PPC64_SECTOFF_HA:
13298 case R_PPC64_TPREL16_HA:
13299 case R_PPC64_DTPREL16_HA:
13300 case R_PPC64_TPREL16_HIGHER:
13301 case R_PPC64_TPREL16_HIGHERA:
13302 case R_PPC64_TPREL16_HIGHEST:
13303 case R_PPC64_TPREL16_HIGHESTA:
13304 case R_PPC64_DTPREL16_HIGHER:
13305 case R_PPC64_DTPREL16_HIGHERA:
13306 case R_PPC64_DTPREL16_HIGHEST:
13307 case R_PPC64_DTPREL16_HIGHESTA:
13308 /* It's just possible that this symbol is a weak symbol
13309 that's not actually defined anywhere. In that case,
13310 'sec' would be NULL, and we should leave the symbol
13311 alone (it will be set to zero elsewhere in the link). */
13312 if (sec == NULL)
13313 break;
13314 /* Fall thru */
13315
13316 case R_PPC64_GOT16_HA:
13317 case R_PPC64_PLTGOT16_HA:
13318 case R_PPC64_PLT16_HA:
13319 case R_PPC64_GOT_TLSGD16_HA:
13320 case R_PPC64_GOT_TLSLD16_HA:
13321 case R_PPC64_GOT_TPREL16_HA:
13322 case R_PPC64_GOT_DTPREL16_HA:
13323 /* Add 0x10000 if sign bit in 0:15 is set.
13324 Bits 0:15 are not used. */
13325 addend += 0x8000;
13326 break;
13327
13328 case R_PPC64_ADDR16_DS:
13329 case R_PPC64_ADDR16_LO_DS:
13330 case R_PPC64_GOT16_DS:
13331 case R_PPC64_GOT16_LO_DS:
13332 case R_PPC64_PLT16_LO_DS:
13333 case R_PPC64_SECTOFF_DS:
13334 case R_PPC64_SECTOFF_LO_DS:
13335 case R_PPC64_TOC16_DS:
13336 case R_PPC64_TOC16_LO_DS:
13337 case R_PPC64_PLTGOT16_DS:
13338 case R_PPC64_PLTGOT16_LO_DS:
13339 case R_PPC64_GOT_TPREL16_DS:
13340 case R_PPC64_GOT_TPREL16_LO_DS:
13341 case R_PPC64_GOT_DTPREL16_DS:
13342 case R_PPC64_GOT_DTPREL16_LO_DS:
13343 case R_PPC64_TPREL16_DS:
13344 case R_PPC64_TPREL16_LO_DS:
13345 case R_PPC64_DTPREL16_DS:
13346 case R_PPC64_DTPREL16_LO_DS:
13347 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13348 mask = 3;
13349 /* If this reloc is against an lq insn, then the value must be
13350 a multiple of 16. This is somewhat of a hack, but the
13351 "correct" way to do this by defining _DQ forms of all the
13352 _DS relocs bloats all reloc switches in this file. It
13353 doesn't seem to make much sense to use any of these relocs
13354 in data, so testing the insn should be safe. */
13355 if ((insn & (0x3f << 26)) == (56u << 26))
13356 mask = 15;
13357 if (((relocation + addend) & mask) != 0)
13358 {
13359 info->callbacks->einfo
13360 (_("%P: %H: error: %s not a multiple of %u\n"),
13361 input_bfd, input_section, rel->r_offset,
13362 ppc64_elf_howto_table[r_type]->name,
13363 mask + 1);
13364 bfd_set_error (bfd_error_bad_value);
13365 ret = FALSE;
13366 continue;
13367 }
13368 break;
13369 }
13370
13371 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13372 because such sections are not SEC_ALLOC and thus ld.so will
13373 not process them. */
13374 if (unresolved_reloc
13375 && !((input_section->flags & SEC_DEBUGGING) != 0
13376 && h->elf.def_dynamic))
13377 {
13378 info->callbacks->einfo
13379 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
13380 input_bfd, input_section, rel->r_offset,
13381 ppc64_elf_howto_table[(int) r_type]->name,
13382 h->elf.root.root.string);
13383 ret = FALSE;
13384 }
13385
13386 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13387 input_bfd,
13388 input_section,
13389 contents,
13390 rel->r_offset,
13391 relocation,
13392 addend);
13393
13394 if (r != bfd_reloc_ok)
13395 {
13396 if (sym_name == NULL)
13397 sym_name = "(null)";
13398 if (r == bfd_reloc_overflow)
13399 {
13400 if (warned)
13401 continue;
13402 if (h != NULL
13403 && h->elf.root.type == bfd_link_hash_undefweak
13404 && ppc64_elf_howto_table[r_type]->pc_relative)
13405 {
13406 /* Assume this is a call protected by other code that
13407 detects the symbol is undefined. If this is the case,
13408 we can safely ignore the overflow. If not, the
13409 program is hosed anyway, and a little warning isn't
13410 going to help. */
13411
13412 continue;
13413 }
13414
13415 if (!((*info->callbacks->reloc_overflow)
13416 (info, (h ? &h->elf.root : NULL), sym_name,
13417 ppc64_elf_howto_table[r_type]->name,
13418 orig_addend, input_bfd, input_section, rel->r_offset)))
13419 return FALSE;
13420 }
13421 else
13422 {
13423 info->callbacks->einfo
13424 (_("%P: %H: %s reloc against `%s': error %d\n"),
13425 input_bfd, input_section, rel->r_offset,
13426 ppc64_elf_howto_table[r_type]->name,
13427 sym_name,
13428 (int) r);
13429 ret = FALSE;
13430 }
13431 }
13432 }
13433
13434 if (ha_opt != NULL)
13435 {
13436 if (!no_ha_opt)
13437 {
13438 unsigned char *opt = ha_opt;
13439 rel = relocs;
13440 relend = relocs + input_section->reloc_count;
13441 for (; rel < relend; opt++, rel++)
13442 if (*opt != 0)
13443 {
13444 bfd_byte *p = contents + (rel->r_offset & ~3);
13445 bfd_put_32 (input_bfd, NOP, p);
13446 }
13447 }
13448 free (ha_opt);
13449 }
13450
13451 /* If we're emitting relocations, then shortly after this function
13452 returns, reloc offsets and addends for this section will be
13453 adjusted. Worse, reloc symbol indices will be for the output
13454 file rather than the input. Save a copy of the relocs for
13455 opd_entry_value. */
13456 if (is_opd && (info->emitrelocations || info->relocatable))
13457 {
13458 bfd_size_type amt;
13459 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13460 rel = bfd_alloc (input_bfd, amt);
13461 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13462 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13463 if (rel == NULL)
13464 return FALSE;
13465 memcpy (rel, relocs, amt);
13466 }
13467 return ret;
13468 }
13469
13470 /* Adjust the value of any local symbols in opd sections. */
13471
13472 static int
13473 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13474 const char *name ATTRIBUTE_UNUSED,
13475 Elf_Internal_Sym *elfsym,
13476 asection *input_sec,
13477 struct elf_link_hash_entry *h)
13478 {
13479 struct _opd_sec_data *opd;
13480 long adjust;
13481 bfd_vma value;
13482
13483 if (h != NULL)
13484 return 1;
13485
13486 opd = get_opd_info (input_sec);
13487 if (opd == NULL || opd->adjust == NULL)
13488 return 1;
13489
13490 value = elfsym->st_value - input_sec->output_offset;
13491 if (!info->relocatable)
13492 value -= input_sec->output_section->vma;
13493
13494 adjust = opd->adjust[value / 8];
13495 if (adjust == -1)
13496 return 2;
13497
13498 elfsym->st_value += adjust;
13499 return 1;
13500 }
13501
13502 /* Finish up dynamic symbol handling. We set the contents of various
13503 dynamic sections here. */
13504
13505 static bfd_boolean
13506 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13507 struct bfd_link_info *info,
13508 struct elf_link_hash_entry *h,
13509 Elf_Internal_Sym *sym)
13510 {
13511 struct ppc_link_hash_table *htab;
13512 struct plt_entry *ent;
13513 Elf_Internal_Rela rela;
13514 bfd_byte *loc;
13515
13516 htab = ppc_hash_table (info);
13517 if (htab == NULL)
13518 return FALSE;
13519
13520 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13521 if (ent->plt.offset != (bfd_vma) -1)
13522 {
13523 /* This symbol has an entry in the procedure linkage
13524 table. Set it up. */
13525 if (!htab->elf.dynamic_sections_created
13526 || h->dynindx == -1)
13527 {
13528 BFD_ASSERT (h->type == STT_GNU_IFUNC
13529 && h->def_regular
13530 && (h->root.type == bfd_link_hash_defined
13531 || h->root.type == bfd_link_hash_defweak));
13532 rela.r_offset = (htab->iplt->output_section->vma
13533 + htab->iplt->output_offset
13534 + ent->plt.offset);
13535 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13536 rela.r_addend = (h->root.u.def.value
13537 + h->root.u.def.section->output_offset
13538 + h->root.u.def.section->output_section->vma
13539 + ent->addend);
13540 loc = (htab->reliplt->contents
13541 + (htab->reliplt->reloc_count++
13542 * sizeof (Elf64_External_Rela)));
13543 }
13544 else
13545 {
13546 rela.r_offset = (htab->plt->output_section->vma
13547 + htab->plt->output_offset
13548 + ent->plt.offset);
13549 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13550 rela.r_addend = ent->addend;
13551 loc = (htab->relplt->contents
13552 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13553 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13554 }
13555 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13556 }
13557
13558 if (h->needs_copy)
13559 {
13560 /* This symbol needs a copy reloc. Set it up. */
13561
13562 if (h->dynindx == -1
13563 || (h->root.type != bfd_link_hash_defined
13564 && h->root.type != bfd_link_hash_defweak)
13565 || htab->relbss == NULL)
13566 abort ();
13567
13568 rela.r_offset = (h->root.u.def.value
13569 + h->root.u.def.section->output_section->vma
13570 + h->root.u.def.section->output_offset);
13571 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13572 rela.r_addend = 0;
13573 loc = htab->relbss->contents;
13574 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13575 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13576 }
13577
13578 /* Mark some specially defined symbols as absolute. */
13579 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13580 sym->st_shndx = SHN_ABS;
13581
13582 return TRUE;
13583 }
13584
13585 /* Used to decide how to sort relocs in an optimal manner for the
13586 dynamic linker, before writing them out. */
13587
13588 static enum elf_reloc_type_class
13589 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13590 {
13591 enum elf_ppc64_reloc_type r_type;
13592
13593 r_type = ELF64_R_TYPE (rela->r_info);
13594 switch (r_type)
13595 {
13596 case R_PPC64_RELATIVE:
13597 return reloc_class_relative;
13598 case R_PPC64_JMP_SLOT:
13599 return reloc_class_plt;
13600 case R_PPC64_COPY:
13601 return reloc_class_copy;
13602 default:
13603 return reloc_class_normal;
13604 }
13605 }
13606
13607 /* Finish up the dynamic sections. */
13608
13609 static bfd_boolean
13610 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13611 struct bfd_link_info *info)
13612 {
13613 struct ppc_link_hash_table *htab;
13614 bfd *dynobj;
13615 asection *sdyn;
13616
13617 htab = ppc_hash_table (info);
13618 if (htab == NULL)
13619 return FALSE;
13620
13621 dynobj = htab->elf.dynobj;
13622 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13623
13624 if (htab->elf.dynamic_sections_created)
13625 {
13626 Elf64_External_Dyn *dyncon, *dynconend;
13627
13628 if (sdyn == NULL || htab->got == NULL)
13629 abort ();
13630
13631 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13632 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13633 for (; dyncon < dynconend; dyncon++)
13634 {
13635 Elf_Internal_Dyn dyn;
13636 asection *s;
13637
13638 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13639
13640 switch (dyn.d_tag)
13641 {
13642 default:
13643 continue;
13644
13645 case DT_PPC64_GLINK:
13646 s = htab->glink;
13647 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13648 /* We stupidly defined DT_PPC64_GLINK to be the start
13649 of glink rather than the first entry point, which is
13650 what ld.so needs, and now have a bigger stub to
13651 support automatic multiple TOCs. */
13652 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13653 break;
13654
13655 case DT_PPC64_OPD:
13656 s = bfd_get_section_by_name (output_bfd, ".opd");
13657 if (s == NULL)
13658 continue;
13659 dyn.d_un.d_ptr = s->vma;
13660 break;
13661
13662 case DT_PPC64_OPDSZ:
13663 s = bfd_get_section_by_name (output_bfd, ".opd");
13664 if (s == NULL)
13665 continue;
13666 dyn.d_un.d_val = s->size;
13667 break;
13668
13669 case DT_PLTGOT:
13670 s = htab->plt;
13671 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13672 break;
13673
13674 case DT_JMPREL:
13675 s = htab->relplt;
13676 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13677 break;
13678
13679 case DT_PLTRELSZ:
13680 dyn.d_un.d_val = htab->relplt->size;
13681 break;
13682
13683 case DT_RELASZ:
13684 /* Don't count procedure linkage table relocs in the
13685 overall reloc count. */
13686 s = htab->relplt;
13687 if (s == NULL)
13688 continue;
13689 dyn.d_un.d_val -= s->size;
13690 break;
13691
13692 case DT_RELA:
13693 /* We may not be using the standard ELF linker script.
13694 If .rela.plt is the first .rela section, we adjust
13695 DT_RELA to not include it. */
13696 s = htab->relplt;
13697 if (s == NULL)
13698 continue;
13699 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13700 continue;
13701 dyn.d_un.d_ptr += s->size;
13702 break;
13703 }
13704
13705 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13706 }
13707 }
13708
13709 if (htab->got != NULL && htab->got->size != 0)
13710 {
13711 /* Fill in the first entry in the global offset table.
13712 We use it to hold the link-time TOCbase. */
13713 bfd_put_64 (output_bfd,
13714 elf_gp (output_bfd) + TOC_BASE_OFF,
13715 htab->got->contents);
13716
13717 /* Set .got entry size. */
13718 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13719 }
13720
13721 if (htab->plt != NULL && htab->plt->size != 0)
13722 {
13723 /* Set .plt entry size. */
13724 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13725 = PLT_ENTRY_SIZE;
13726 }
13727
13728 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13729 brlt ourselves if emitrelocations. */
13730 if (htab->brlt != NULL
13731 && htab->brlt->reloc_count != 0
13732 && !_bfd_elf_link_output_relocs (output_bfd,
13733 htab->brlt,
13734 elf_section_data (htab->brlt)->rela.hdr,
13735 elf_section_data (htab->brlt)->relocs,
13736 NULL))
13737 return FALSE;
13738
13739 if (htab->glink != NULL
13740 && htab->glink->reloc_count != 0
13741 && !_bfd_elf_link_output_relocs (output_bfd,
13742 htab->glink,
13743 elf_section_data (htab->glink)->rela.hdr,
13744 elf_section_data (htab->glink)->relocs,
13745 NULL))
13746 return FALSE;
13747
13748
13749 if (htab->glink_eh_frame != NULL
13750 && htab->glink_eh_frame->sec_info_type == ELF_INFO_TYPE_EH_FRAME
13751 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
13752 htab->glink_eh_frame,
13753 htab->glink_eh_frame->contents))
13754 return FALSE;
13755
13756 /* We need to handle writing out multiple GOT sections ourselves,
13757 since we didn't add them to DYNOBJ. We know dynobj is the first
13758 bfd. */
13759 while ((dynobj = dynobj->link_next) != NULL)
13760 {
13761 asection *s;
13762
13763 if (!is_ppc64_elf (dynobj))
13764 continue;
13765
13766 s = ppc64_elf_tdata (dynobj)->got;
13767 if (s != NULL
13768 && s->size != 0
13769 && s->output_section != bfd_abs_section_ptr
13770 && !bfd_set_section_contents (output_bfd, s->output_section,
13771 s->contents, s->output_offset,
13772 s->size))
13773 return FALSE;
13774 s = ppc64_elf_tdata (dynobj)->relgot;
13775 if (s != NULL
13776 && s->size != 0
13777 && s->output_section != bfd_abs_section_ptr
13778 && !bfd_set_section_contents (output_bfd, s->output_section,
13779 s->contents, s->output_offset,
13780 s->size))
13781 return FALSE;
13782 }
13783
13784 return TRUE;
13785 }
13786
13787 #include "elf64-target.h"
GDB Binutils - Deliverables
This page took 0.315212 seconds and 4 git commands to generate.