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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011, 2012 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 XOR_R11_R11_R11 0x7d6b5a78 /* xor %r11,%r11,%r11 */
156 #define ADD_R12_R12_R11 0x7d8c5a14 /* add %r12,%r12,%r11 */
157 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
158 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
159 #define BNECTR 0x4ca20420 /* bnectr+ */
160 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
161
162 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
163 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
164
165 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
166
167 /* glink call stub instructions. We enter with the index in R0. */
168 #define GLINK_CALL_STUB_SIZE (16*4)
169 /* 0: */
170 /* .quad plt0-1f */
171 /* __glink: */
172 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
173 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
174 /* 1: */
175 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
176 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
177 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
178 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
179 /* ld %11,0(%12) */
180 /* ld %2,8(%12) */
181 /* mtctr %11 */
182 /* ld %11,16(%12) */
183 /* bctr */
184
185 /* Pad with this. */
186 #define NOP 0x60000000
187
188 /* Some other nops. */
189 #define CROR_151515 0x4def7b82
190 #define CROR_313131 0x4ffffb82
191
192 /* .glink entries for the first 32k functions are two instructions. */
193 #define LI_R0_0 0x38000000 /* li %r0,0 */
194 #define B_DOT 0x48000000 /* b . */
195
196 /* After that, we need two instructions to load the index, followed by
197 a branch. */
198 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
199 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
200
201 /* Instructions used by the save and restore reg functions. */
202 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
203 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
204 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
205 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
206 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
207 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
208 #define LI_R12_0 0x39800000 /* li %r12,0 */
209 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
210 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
211 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
212 #define BLR 0x4e800020 /* blr */
213
214 /* Since .opd is an array of descriptors and each entry will end up
215 with identical R_PPC64_RELATIVE relocs, there is really no need to
216 propagate .opd relocs; The dynamic linker should be taught to
217 relocate .opd without reloc entries. */
218 #ifndef NO_OPD_RELOCS
219 #define NO_OPD_RELOCS 0
220 #endif
221 \f
222 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
223
224 /* Relocation HOWTO's. */
225 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
226
227 static reloc_howto_type ppc64_elf_howto_raw[] = {
228 /* This reloc does nothing. */
229 HOWTO (R_PPC64_NONE, /* type */
230 0, /* rightshift */
231 2, /* size (0 = byte, 1 = short, 2 = long) */
232 32, /* bitsize */
233 FALSE, /* pc_relative */
234 0, /* bitpos */
235 complain_overflow_dont, /* complain_on_overflow */
236 bfd_elf_generic_reloc, /* special_function */
237 "R_PPC64_NONE", /* name */
238 FALSE, /* partial_inplace */
239 0, /* src_mask */
240 0, /* dst_mask */
241 FALSE), /* pcrel_offset */
242
243 /* A standard 32 bit relocation. */
244 HOWTO (R_PPC64_ADDR32, /* type */
245 0, /* rightshift */
246 2, /* size (0 = byte, 1 = short, 2 = long) */
247 32, /* bitsize */
248 FALSE, /* pc_relative */
249 0, /* bitpos */
250 complain_overflow_bitfield, /* complain_on_overflow */
251 bfd_elf_generic_reloc, /* special_function */
252 "R_PPC64_ADDR32", /* name */
253 FALSE, /* partial_inplace */
254 0, /* src_mask */
255 0xffffffff, /* dst_mask */
256 FALSE), /* pcrel_offset */
257
258 /* An absolute 26 bit branch; the lower two bits must be zero.
259 FIXME: we don't check that, we just clear them. */
260 HOWTO (R_PPC64_ADDR24, /* type */
261 0, /* rightshift */
262 2, /* size (0 = byte, 1 = short, 2 = long) */
263 26, /* bitsize */
264 FALSE, /* pc_relative */
265 0, /* bitpos */
266 complain_overflow_bitfield, /* complain_on_overflow */
267 bfd_elf_generic_reloc, /* special_function */
268 "R_PPC64_ADDR24", /* name */
269 FALSE, /* partial_inplace */
270 0, /* src_mask */
271 0x03fffffc, /* dst_mask */
272 FALSE), /* pcrel_offset */
273
274 /* A standard 16 bit relocation. */
275 HOWTO (R_PPC64_ADDR16, /* type */
276 0, /* rightshift */
277 1, /* size (0 = byte, 1 = short, 2 = long) */
278 16, /* bitsize */
279 FALSE, /* pc_relative */
280 0, /* bitpos */
281 complain_overflow_bitfield, /* complain_on_overflow */
282 bfd_elf_generic_reloc, /* special_function */
283 "R_PPC64_ADDR16", /* name */
284 FALSE, /* partial_inplace */
285 0, /* src_mask */
286 0xffff, /* dst_mask */
287 FALSE), /* pcrel_offset */
288
289 /* A 16 bit relocation without overflow. */
290 HOWTO (R_PPC64_ADDR16_LO, /* type */
291 0, /* rightshift */
292 1, /* size (0 = byte, 1 = short, 2 = long) */
293 16, /* bitsize */
294 FALSE, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_dont,/* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC64_ADDR16_LO", /* name */
299 FALSE, /* partial_inplace */
300 0, /* src_mask */
301 0xffff, /* dst_mask */
302 FALSE), /* pcrel_offset */
303
304 /* Bits 16-31 of an address. */
305 HOWTO (R_PPC64_ADDR16_HI, /* type */
306 16, /* rightshift */
307 1, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_dont, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR16_HI", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xffff, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
320 bits, treated as a signed number, is negative. */
321 HOWTO (R_PPC64_ADDR16_HA, /* type */
322 16, /* rightshift */
323 1, /* size (0 = byte, 1 = short, 2 = long) */
324 16, /* bitsize */
325 FALSE, /* pc_relative */
326 0, /* bitpos */
327 complain_overflow_dont, /* complain_on_overflow */
328 ppc64_elf_ha_reloc, /* special_function */
329 "R_PPC64_ADDR16_HA", /* name */
330 FALSE, /* partial_inplace */
331 0, /* src_mask */
332 0xffff, /* dst_mask */
333 FALSE), /* pcrel_offset */
334
335 /* An absolute 16 bit branch; the lower two bits must be zero.
336 FIXME: we don't check that, we just clear them. */
337 HOWTO (R_PPC64_ADDR14, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_bitfield, /* complain_on_overflow */
344 ppc64_elf_branch_reloc, /* special_function */
345 "R_PPC64_ADDR14", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0x0000fffc, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 /* An absolute 16 bit branch, for which bit 10 should be set to
352 indicate that the branch is expected to be taken. The lower two
353 bits must be zero. */
354 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
355 0, /* rightshift */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 FALSE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_bitfield, /* complain_on_overflow */
361 ppc64_elf_brtaken_reloc, /* special_function */
362 "R_PPC64_ADDR14_BRTAKEN",/* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0x0000fffc, /* dst_mask */
366 FALSE), /* pcrel_offset */
367
368 /* An absolute 16 bit branch, for which bit 10 should be set to
369 indicate that the branch is not expected to be taken. The lower
370 two bits must be zero. */
371 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
372 0, /* rightshift */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
374 16, /* bitsize */
375 FALSE, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_bitfield, /* complain_on_overflow */
378 ppc64_elf_brtaken_reloc, /* special_function */
379 "R_PPC64_ADDR14_BRNTAKEN",/* name */
380 FALSE, /* partial_inplace */
381 0, /* src_mask */
382 0x0000fffc, /* dst_mask */
383 FALSE), /* pcrel_offset */
384
385 /* A relative 26 bit branch; the lower two bits must be zero. */
386 HOWTO (R_PPC64_REL24, /* type */
387 0, /* rightshift */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
389 26, /* bitsize */
390 TRUE, /* pc_relative */
391 0, /* bitpos */
392 complain_overflow_signed, /* complain_on_overflow */
393 ppc64_elf_branch_reloc, /* special_function */
394 "R_PPC64_REL24", /* name */
395 FALSE, /* partial_inplace */
396 0, /* src_mask */
397 0x03fffffc, /* dst_mask */
398 TRUE), /* pcrel_offset */
399
400 /* A relative 16 bit branch; the lower two bits must be zero. */
401 HOWTO (R_PPC64_REL14, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 TRUE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_signed, /* complain_on_overflow */
408 ppc64_elf_branch_reloc, /* special_function */
409 "R_PPC64_REL14", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0x0000fffc, /* dst_mask */
413 TRUE), /* pcrel_offset */
414
415 /* A relative 16 bit branch. Bit 10 should be set to indicate that
416 the branch is expected to be taken. The lower two bits must be
417 zero. */
418 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
419 0, /* rightshift */
420 2, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* bitsize */
422 TRUE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_signed, /* complain_on_overflow */
425 ppc64_elf_brtaken_reloc, /* special_function */
426 "R_PPC64_REL14_BRTAKEN", /* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0x0000fffc, /* dst_mask */
430 TRUE), /* pcrel_offset */
431
432 /* A relative 16 bit branch. Bit 10 should be set to indicate that
433 the branch is not expected to be taken. The lower two bits must
434 be zero. */
435 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
436 0, /* rightshift */
437 2, /* size (0 = byte, 1 = short, 2 = long) */
438 16, /* bitsize */
439 TRUE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_signed, /* complain_on_overflow */
442 ppc64_elf_brtaken_reloc, /* special_function */
443 "R_PPC64_REL14_BRNTAKEN",/* name */
444 FALSE, /* partial_inplace */
445 0, /* src_mask */
446 0x0000fffc, /* dst_mask */
447 TRUE), /* pcrel_offset */
448
449 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
450 symbol. */
451 HOWTO (R_PPC64_GOT16, /* type */
452 0, /* rightshift */
453 1, /* size (0 = byte, 1 = short, 2 = long) */
454 16, /* bitsize */
455 FALSE, /* pc_relative */
456 0, /* bitpos */
457 complain_overflow_signed, /* complain_on_overflow */
458 ppc64_elf_unhandled_reloc, /* special_function */
459 "R_PPC64_GOT16", /* name */
460 FALSE, /* partial_inplace */
461 0, /* src_mask */
462 0xffff, /* dst_mask */
463 FALSE), /* pcrel_offset */
464
465 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
466 the symbol. */
467 HOWTO (R_PPC64_GOT16_LO, /* type */
468 0, /* rightshift */
469 1, /* size (0 = byte, 1 = short, 2 = long) */
470 16, /* bitsize */
471 FALSE, /* pc_relative */
472 0, /* bitpos */
473 complain_overflow_dont, /* complain_on_overflow */
474 ppc64_elf_unhandled_reloc, /* special_function */
475 "R_PPC64_GOT16_LO", /* name */
476 FALSE, /* partial_inplace */
477 0, /* src_mask */
478 0xffff, /* dst_mask */
479 FALSE), /* pcrel_offset */
480
481 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
482 the symbol. */
483 HOWTO (R_PPC64_GOT16_HI, /* type */
484 16, /* rightshift */
485 1, /* size (0 = byte, 1 = short, 2 = long) */
486 16, /* bitsize */
487 FALSE, /* pc_relative */
488 0, /* bitpos */
489 complain_overflow_dont,/* complain_on_overflow */
490 ppc64_elf_unhandled_reloc, /* special_function */
491 "R_PPC64_GOT16_HI", /* name */
492 FALSE, /* partial_inplace */
493 0, /* src_mask */
494 0xffff, /* dst_mask */
495 FALSE), /* pcrel_offset */
496
497 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
498 the symbol. */
499 HOWTO (R_PPC64_GOT16_HA, /* type */
500 16, /* rightshift */
501 1, /* size (0 = byte, 1 = short, 2 = long) */
502 16, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_dont,/* complain_on_overflow */
506 ppc64_elf_unhandled_reloc, /* special_function */
507 "R_PPC64_GOT16_HA", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0xffff, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* This is used only by the dynamic linker. The symbol should exist
514 both in the object being run and in some shared library. The
515 dynamic linker copies the data addressed by the symbol from the
516 shared library into the object, because the object being
517 run has to have the data at some particular address. */
518 HOWTO (R_PPC64_COPY, /* type */
519 0, /* rightshift */
520 0, /* this one is variable size */
521 0, /* bitsize */
522 FALSE, /* pc_relative */
523 0, /* bitpos */
524 complain_overflow_dont, /* complain_on_overflow */
525 ppc64_elf_unhandled_reloc, /* special_function */
526 "R_PPC64_COPY", /* name */
527 FALSE, /* partial_inplace */
528 0, /* src_mask */
529 0, /* dst_mask */
530 FALSE), /* pcrel_offset */
531
532 /* Like R_PPC64_ADDR64, but used when setting global offset table
533 entries. */
534 HOWTO (R_PPC64_GLOB_DAT, /* type */
535 0, /* rightshift */
536 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
537 64, /* bitsize */
538 FALSE, /* pc_relative */
539 0, /* bitpos */
540 complain_overflow_dont, /* complain_on_overflow */
541 ppc64_elf_unhandled_reloc, /* special_function */
542 "R_PPC64_GLOB_DAT", /* name */
543 FALSE, /* partial_inplace */
544 0, /* src_mask */
545 ONES (64), /* dst_mask */
546 FALSE), /* pcrel_offset */
547
548 /* Created by the link editor. Marks a procedure linkage table
549 entry for a symbol. */
550 HOWTO (R_PPC64_JMP_SLOT, /* type */
551 0, /* rightshift */
552 0, /* size (0 = byte, 1 = short, 2 = long) */
553 0, /* bitsize */
554 FALSE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_dont, /* complain_on_overflow */
557 ppc64_elf_unhandled_reloc, /* special_function */
558 "R_PPC64_JMP_SLOT", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 0, /* dst_mask */
562 FALSE), /* pcrel_offset */
563
564 /* Used only by the dynamic linker. When the object is run, this
565 doubleword64 is set to the load address of the object, plus the
566 addend. */
567 HOWTO (R_PPC64_RELATIVE, /* type */
568 0, /* rightshift */
569 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
570 64, /* bitsize */
571 FALSE, /* pc_relative */
572 0, /* bitpos */
573 complain_overflow_dont, /* complain_on_overflow */
574 bfd_elf_generic_reloc, /* special_function */
575 "R_PPC64_RELATIVE", /* name */
576 FALSE, /* partial_inplace */
577 0, /* src_mask */
578 ONES (64), /* dst_mask */
579 FALSE), /* pcrel_offset */
580
581 /* Like R_PPC64_ADDR32, but may be unaligned. */
582 HOWTO (R_PPC64_UADDR32, /* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 32, /* bitsize */
586 FALSE, /* pc_relative */
587 0, /* bitpos */
588 complain_overflow_bitfield, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_PPC64_UADDR32", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0xffffffff, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 /* Like R_PPC64_ADDR16, but may be unaligned. */
597 HOWTO (R_PPC64_UADDR16, /* type */
598 0, /* rightshift */
599 1, /* size (0 = byte, 1 = short, 2 = long) */
600 16, /* bitsize */
601 FALSE, /* pc_relative */
602 0, /* bitpos */
603 complain_overflow_bitfield, /* complain_on_overflow */
604 bfd_elf_generic_reloc, /* special_function */
605 "R_PPC64_UADDR16", /* name */
606 FALSE, /* partial_inplace */
607 0, /* src_mask */
608 0xffff, /* dst_mask */
609 FALSE), /* pcrel_offset */
610
611 /* 32-bit PC relative. */
612 HOWTO (R_PPC64_REL32, /* type */
613 0, /* rightshift */
614 2, /* size (0 = byte, 1 = short, 2 = long) */
615 32, /* bitsize */
616 TRUE, /* pc_relative */
617 0, /* bitpos */
618 /* FIXME: Verify. Was complain_overflow_bitfield. */
619 complain_overflow_signed, /* complain_on_overflow */
620 bfd_elf_generic_reloc, /* special_function */
621 "R_PPC64_REL32", /* name */
622 FALSE, /* partial_inplace */
623 0, /* src_mask */
624 0xffffffff, /* dst_mask */
625 TRUE), /* pcrel_offset */
626
627 /* 32-bit relocation to the symbol's procedure linkage table. */
628 HOWTO (R_PPC64_PLT32, /* type */
629 0, /* rightshift */
630 2, /* size (0 = byte, 1 = short, 2 = long) */
631 32, /* bitsize */
632 FALSE, /* pc_relative */
633 0, /* bitpos */
634 complain_overflow_bitfield, /* complain_on_overflow */
635 ppc64_elf_unhandled_reloc, /* special_function */
636 "R_PPC64_PLT32", /* name */
637 FALSE, /* partial_inplace */
638 0, /* src_mask */
639 0xffffffff, /* dst_mask */
640 FALSE), /* pcrel_offset */
641
642 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
643 FIXME: R_PPC64_PLTREL32 not supported. */
644 HOWTO (R_PPC64_PLTREL32, /* type */
645 0, /* rightshift */
646 2, /* size (0 = byte, 1 = short, 2 = long) */
647 32, /* bitsize */
648 TRUE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_signed, /* complain_on_overflow */
651 bfd_elf_generic_reloc, /* special_function */
652 "R_PPC64_PLTREL32", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffffffff, /* dst_mask */
656 TRUE), /* pcrel_offset */
657
658 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
659 the symbol. */
660 HOWTO (R_PPC64_PLT16_LO, /* type */
661 0, /* rightshift */
662 1, /* size (0 = byte, 1 = short, 2 = long) */
663 16, /* bitsize */
664 FALSE, /* pc_relative */
665 0, /* bitpos */
666 complain_overflow_dont, /* complain_on_overflow */
667 ppc64_elf_unhandled_reloc, /* special_function */
668 "R_PPC64_PLT16_LO", /* name */
669 FALSE, /* partial_inplace */
670 0, /* src_mask */
671 0xffff, /* dst_mask */
672 FALSE), /* pcrel_offset */
673
674 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
675 the symbol. */
676 HOWTO (R_PPC64_PLT16_HI, /* type */
677 16, /* rightshift */
678 1, /* size (0 = byte, 1 = short, 2 = long) */
679 16, /* bitsize */
680 FALSE, /* pc_relative */
681 0, /* bitpos */
682 complain_overflow_dont, /* complain_on_overflow */
683 ppc64_elf_unhandled_reloc, /* special_function */
684 "R_PPC64_PLT16_HI", /* name */
685 FALSE, /* partial_inplace */
686 0, /* src_mask */
687 0xffff, /* dst_mask */
688 FALSE), /* pcrel_offset */
689
690 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
691 the symbol. */
692 HOWTO (R_PPC64_PLT16_HA, /* type */
693 16, /* rightshift */
694 1, /* size (0 = byte, 1 = short, 2 = long) */
695 16, /* bitsize */
696 FALSE, /* pc_relative */
697 0, /* bitpos */
698 complain_overflow_dont, /* complain_on_overflow */
699 ppc64_elf_unhandled_reloc, /* special_function */
700 "R_PPC64_PLT16_HA", /* name */
701 FALSE, /* partial_inplace */
702 0, /* src_mask */
703 0xffff, /* dst_mask */
704 FALSE), /* pcrel_offset */
705
706 /* 16-bit section relative relocation. */
707 HOWTO (R_PPC64_SECTOFF, /* type */
708 0, /* rightshift */
709 1, /* size (0 = byte, 1 = short, 2 = long) */
710 16, /* bitsize */
711 FALSE, /* pc_relative */
712 0, /* bitpos */
713 complain_overflow_bitfield, /* complain_on_overflow */
714 ppc64_elf_sectoff_reloc, /* special_function */
715 "R_PPC64_SECTOFF", /* name */
716 FALSE, /* partial_inplace */
717 0, /* src_mask */
718 0xffff, /* dst_mask */
719 FALSE), /* pcrel_offset */
720
721 /* Like R_PPC64_SECTOFF, but no overflow warning. */
722 HOWTO (R_PPC64_SECTOFF_LO, /* type */
723 0, /* rightshift */
724 1, /* size (0 = byte, 1 = short, 2 = long) */
725 16, /* bitsize */
726 FALSE, /* pc_relative */
727 0, /* bitpos */
728 complain_overflow_dont, /* complain_on_overflow */
729 ppc64_elf_sectoff_reloc, /* special_function */
730 "R_PPC64_SECTOFF_LO", /* name */
731 FALSE, /* partial_inplace */
732 0, /* src_mask */
733 0xffff, /* dst_mask */
734 FALSE), /* pcrel_offset */
735
736 /* 16-bit upper half section relative relocation. */
737 HOWTO (R_PPC64_SECTOFF_HI, /* type */
738 16, /* rightshift */
739 1, /* size (0 = byte, 1 = short, 2 = long) */
740 16, /* bitsize */
741 FALSE, /* pc_relative */
742 0, /* bitpos */
743 complain_overflow_dont, /* complain_on_overflow */
744 ppc64_elf_sectoff_reloc, /* special_function */
745 "R_PPC64_SECTOFF_HI", /* name */
746 FALSE, /* partial_inplace */
747 0, /* src_mask */
748 0xffff, /* dst_mask */
749 FALSE), /* pcrel_offset */
750
751 /* 16-bit upper half adjusted section relative relocation. */
752 HOWTO (R_PPC64_SECTOFF_HA, /* type */
753 16, /* rightshift */
754 1, /* size (0 = byte, 1 = short, 2 = long) */
755 16, /* bitsize */
756 FALSE, /* pc_relative */
757 0, /* bitpos */
758 complain_overflow_dont, /* complain_on_overflow */
759 ppc64_elf_sectoff_ha_reloc, /* special_function */
760 "R_PPC64_SECTOFF_HA", /* name */
761 FALSE, /* partial_inplace */
762 0, /* src_mask */
763 0xffff, /* dst_mask */
764 FALSE), /* pcrel_offset */
765
766 /* Like R_PPC64_REL24 without touching the two least significant bits. */
767 HOWTO (R_PPC64_REL30, /* type */
768 2, /* rightshift */
769 2, /* size (0 = byte, 1 = short, 2 = long) */
770 30, /* bitsize */
771 TRUE, /* pc_relative */
772 0, /* bitpos */
773 complain_overflow_dont, /* complain_on_overflow */
774 bfd_elf_generic_reloc, /* special_function */
775 "R_PPC64_REL30", /* name */
776 FALSE, /* partial_inplace */
777 0, /* src_mask */
778 0xfffffffc, /* dst_mask */
779 TRUE), /* pcrel_offset */
780
781 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
782
783 /* A standard 64-bit relocation. */
784 HOWTO (R_PPC64_ADDR64, /* type */
785 0, /* rightshift */
786 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
787 64, /* bitsize */
788 FALSE, /* pc_relative */
789 0, /* bitpos */
790 complain_overflow_dont, /* complain_on_overflow */
791 bfd_elf_generic_reloc, /* special_function */
792 "R_PPC64_ADDR64", /* name */
793 FALSE, /* partial_inplace */
794 0, /* src_mask */
795 ONES (64), /* dst_mask */
796 FALSE), /* pcrel_offset */
797
798 /* The bits 32-47 of an address. */
799 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
800 32, /* rightshift */
801 1, /* size (0 = byte, 1 = short, 2 = long) */
802 16, /* bitsize */
803 FALSE, /* pc_relative */
804 0, /* bitpos */
805 complain_overflow_dont, /* complain_on_overflow */
806 bfd_elf_generic_reloc, /* special_function */
807 "R_PPC64_ADDR16_HIGHER", /* name */
808 FALSE, /* partial_inplace */
809 0, /* src_mask */
810 0xffff, /* dst_mask */
811 FALSE), /* pcrel_offset */
812
813 /* The bits 32-47 of an address, plus 1 if the contents of the low
814 16 bits, treated as a signed number, is negative. */
815 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
816 32, /* rightshift */
817 1, /* size (0 = byte, 1 = short, 2 = long) */
818 16, /* bitsize */
819 FALSE, /* pc_relative */
820 0, /* bitpos */
821 complain_overflow_dont, /* complain_on_overflow */
822 ppc64_elf_ha_reloc, /* special_function */
823 "R_PPC64_ADDR16_HIGHERA", /* name */
824 FALSE, /* partial_inplace */
825 0, /* src_mask */
826 0xffff, /* dst_mask */
827 FALSE), /* pcrel_offset */
828
829 /* The bits 48-63 of an address. */
830 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
831 48, /* rightshift */
832 1, /* size (0 = byte, 1 = short, 2 = long) */
833 16, /* bitsize */
834 FALSE, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_dont, /* complain_on_overflow */
837 bfd_elf_generic_reloc, /* special_function */
838 "R_PPC64_ADDR16_HIGHEST", /* name */
839 FALSE, /* partial_inplace */
840 0, /* src_mask */
841 0xffff, /* dst_mask */
842 FALSE), /* pcrel_offset */
843
844 /* The bits 48-63 of an address, plus 1 if the contents of the low
845 16 bits, treated as a signed number, is negative. */
846 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
847 48, /* rightshift */
848 1, /* size (0 = byte, 1 = short, 2 = long) */
849 16, /* bitsize */
850 FALSE, /* pc_relative */
851 0, /* bitpos */
852 complain_overflow_dont, /* complain_on_overflow */
853 ppc64_elf_ha_reloc, /* special_function */
854 "R_PPC64_ADDR16_HIGHESTA", /* name */
855 FALSE, /* partial_inplace */
856 0, /* src_mask */
857 0xffff, /* dst_mask */
858 FALSE), /* pcrel_offset */
859
860 /* Like ADDR64, but may be unaligned. */
861 HOWTO (R_PPC64_UADDR64, /* type */
862 0, /* rightshift */
863 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
864 64, /* bitsize */
865 FALSE, /* pc_relative */
866 0, /* bitpos */
867 complain_overflow_dont, /* complain_on_overflow */
868 bfd_elf_generic_reloc, /* special_function */
869 "R_PPC64_UADDR64", /* name */
870 FALSE, /* partial_inplace */
871 0, /* src_mask */
872 ONES (64), /* dst_mask */
873 FALSE), /* pcrel_offset */
874
875 /* 64-bit relative relocation. */
876 HOWTO (R_PPC64_REL64, /* type */
877 0, /* rightshift */
878 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
879 64, /* bitsize */
880 TRUE, /* pc_relative */
881 0, /* bitpos */
882 complain_overflow_dont, /* complain_on_overflow */
883 bfd_elf_generic_reloc, /* special_function */
884 "R_PPC64_REL64", /* name */
885 FALSE, /* partial_inplace */
886 0, /* src_mask */
887 ONES (64), /* dst_mask */
888 TRUE), /* pcrel_offset */
889
890 /* 64-bit relocation to the symbol's procedure linkage table. */
891 HOWTO (R_PPC64_PLT64, /* type */
892 0, /* rightshift */
893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
894 64, /* bitsize */
895 FALSE, /* pc_relative */
896 0, /* bitpos */
897 complain_overflow_dont, /* complain_on_overflow */
898 ppc64_elf_unhandled_reloc, /* special_function */
899 "R_PPC64_PLT64", /* name */
900 FALSE, /* partial_inplace */
901 0, /* src_mask */
902 ONES (64), /* dst_mask */
903 FALSE), /* pcrel_offset */
904
905 /* 64-bit PC relative relocation to the symbol's procedure linkage
906 table. */
907 /* FIXME: R_PPC64_PLTREL64 not supported. */
908 HOWTO (R_PPC64_PLTREL64, /* type */
909 0, /* rightshift */
910 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
911 64, /* bitsize */
912 TRUE, /* pc_relative */
913 0, /* bitpos */
914 complain_overflow_dont, /* complain_on_overflow */
915 ppc64_elf_unhandled_reloc, /* special_function */
916 "R_PPC64_PLTREL64", /* name */
917 FALSE, /* partial_inplace */
918 0, /* src_mask */
919 ONES (64), /* dst_mask */
920 TRUE), /* pcrel_offset */
921
922 /* 16 bit TOC-relative relocation. */
923
924 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
925 HOWTO (R_PPC64_TOC16, /* type */
926 0, /* rightshift */
927 1, /* size (0 = byte, 1 = short, 2 = long) */
928 16, /* bitsize */
929 FALSE, /* pc_relative */
930 0, /* bitpos */
931 complain_overflow_signed, /* complain_on_overflow */
932 ppc64_elf_toc_reloc, /* special_function */
933 "R_PPC64_TOC16", /* name */
934 FALSE, /* partial_inplace */
935 0, /* src_mask */
936 0xffff, /* dst_mask */
937 FALSE), /* pcrel_offset */
938
939 /* 16 bit TOC-relative relocation without overflow. */
940
941 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
942 HOWTO (R_PPC64_TOC16_LO, /* type */
943 0, /* rightshift */
944 1, /* size (0 = byte, 1 = short, 2 = long) */
945 16, /* bitsize */
946 FALSE, /* pc_relative */
947 0, /* bitpos */
948 complain_overflow_dont, /* complain_on_overflow */
949 ppc64_elf_toc_reloc, /* special_function */
950 "R_PPC64_TOC16_LO", /* name */
951 FALSE, /* partial_inplace */
952 0, /* src_mask */
953 0xffff, /* dst_mask */
954 FALSE), /* pcrel_offset */
955
956 /* 16 bit TOC-relative relocation, high 16 bits. */
957
958 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
959 HOWTO (R_PPC64_TOC16_HI, /* type */
960 16, /* rightshift */
961 1, /* size (0 = byte, 1 = short, 2 = long) */
962 16, /* bitsize */
963 FALSE, /* pc_relative */
964 0, /* bitpos */
965 complain_overflow_dont, /* complain_on_overflow */
966 ppc64_elf_toc_reloc, /* special_function */
967 "R_PPC64_TOC16_HI", /* name */
968 FALSE, /* partial_inplace */
969 0, /* src_mask */
970 0xffff, /* dst_mask */
971 FALSE), /* pcrel_offset */
972
973 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
974 contents of the low 16 bits, treated as a signed number, is
975 negative. */
976
977 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
978 HOWTO (R_PPC64_TOC16_HA, /* type */
979 16, /* rightshift */
980 1, /* size (0 = byte, 1 = short, 2 = long) */
981 16, /* bitsize */
982 FALSE, /* pc_relative */
983 0, /* bitpos */
984 complain_overflow_dont, /* complain_on_overflow */
985 ppc64_elf_toc_ha_reloc, /* special_function */
986 "R_PPC64_TOC16_HA", /* name */
987 FALSE, /* partial_inplace */
988 0, /* src_mask */
989 0xffff, /* dst_mask */
990 FALSE), /* pcrel_offset */
991
992 /* 64-bit relocation; insert value of TOC base (.TOC.). */
993
994 /* R_PPC64_TOC 51 doubleword64 .TOC. */
995 HOWTO (R_PPC64_TOC, /* type */
996 0, /* rightshift */
997 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
998 64, /* bitsize */
999 FALSE, /* pc_relative */
1000 0, /* bitpos */
1001 complain_overflow_bitfield, /* complain_on_overflow */
1002 ppc64_elf_toc64_reloc, /* special_function */
1003 "R_PPC64_TOC", /* name */
1004 FALSE, /* partial_inplace */
1005 0, /* src_mask */
1006 ONES (64), /* dst_mask */
1007 FALSE), /* pcrel_offset */
1008
1009 /* Like R_PPC64_GOT16, but also informs the link editor that the
1010 value to relocate may (!) refer to a PLT entry which the link
1011 editor (a) may replace with the symbol value. If the link editor
1012 is unable to fully resolve the symbol, it may (b) create a PLT
1013 entry and store the address to the new PLT entry in the GOT.
1014 This permits lazy resolution of function symbols at run time.
1015 The link editor may also skip all of this and just (c) emit a
1016 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1017 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1018 HOWTO (R_PPC64_PLTGOT16, /* type */
1019 0, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_signed, /* complain_on_overflow */
1025 ppc64_elf_unhandled_reloc, /* special_function */
1026 "R_PPC64_PLTGOT16", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like R_PPC64_PLTGOT16, but without overflow. */
1033 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1034 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1035 0, /* rightshift */
1036 1, /* size (0 = byte, 1 = short, 2 = long) */
1037 16, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_dont, /* complain_on_overflow */
1041 ppc64_elf_unhandled_reloc, /* special_function */
1042 "R_PPC64_PLTGOT16_LO", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 0xffff, /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1049 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1050 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1051 16, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_dont, /* complain_on_overflow */
1057 ppc64_elf_unhandled_reloc, /* special_function */
1058 "R_PPC64_PLTGOT16_HI", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1065 1 if the contents of the low 16 bits, treated as a signed number,
1066 is negative. */
1067 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1068 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1069 16, /* rightshift */
1070 1, /* size (0 = byte, 1 = short, 2 = long) */
1071 16, /* bitsize */
1072 FALSE, /* pc_relative */
1073 0, /* bitpos */
1074 complain_overflow_dont,/* complain_on_overflow */
1075 ppc64_elf_unhandled_reloc, /* special_function */
1076 "R_PPC64_PLTGOT16_HA", /* name */
1077 FALSE, /* partial_inplace */
1078 0, /* src_mask */
1079 0xffff, /* dst_mask */
1080 FALSE), /* pcrel_offset */
1081
1082 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1083 HOWTO (R_PPC64_ADDR16_DS, /* type */
1084 0, /* rightshift */
1085 1, /* size (0 = byte, 1 = short, 2 = long) */
1086 16, /* bitsize */
1087 FALSE, /* pc_relative */
1088 0, /* bitpos */
1089 complain_overflow_bitfield, /* complain_on_overflow */
1090 bfd_elf_generic_reloc, /* special_function */
1091 "R_PPC64_ADDR16_DS", /* name */
1092 FALSE, /* partial_inplace */
1093 0, /* src_mask */
1094 0xfffc, /* dst_mask */
1095 FALSE), /* pcrel_offset */
1096
1097 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1098 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1099 0, /* rightshift */
1100 1, /* size (0 = byte, 1 = short, 2 = long) */
1101 16, /* bitsize */
1102 FALSE, /* pc_relative */
1103 0, /* bitpos */
1104 complain_overflow_dont,/* complain_on_overflow */
1105 bfd_elf_generic_reloc, /* special_function */
1106 "R_PPC64_ADDR16_LO_DS",/* name */
1107 FALSE, /* partial_inplace */
1108 0, /* src_mask */
1109 0xfffc, /* dst_mask */
1110 FALSE), /* pcrel_offset */
1111
1112 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1113 HOWTO (R_PPC64_GOT16_DS, /* type */
1114 0, /* rightshift */
1115 1, /* size (0 = byte, 1 = short, 2 = long) */
1116 16, /* bitsize */
1117 FALSE, /* pc_relative */
1118 0, /* bitpos */
1119 complain_overflow_signed, /* complain_on_overflow */
1120 ppc64_elf_unhandled_reloc, /* special_function */
1121 "R_PPC64_GOT16_DS", /* name */
1122 FALSE, /* partial_inplace */
1123 0, /* src_mask */
1124 0xfffc, /* dst_mask */
1125 FALSE), /* pcrel_offset */
1126
1127 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1128 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1129 0, /* rightshift */
1130 1, /* size (0 = byte, 1 = short, 2 = long) */
1131 16, /* bitsize */
1132 FALSE, /* pc_relative */
1133 0, /* bitpos */
1134 complain_overflow_dont, /* complain_on_overflow */
1135 ppc64_elf_unhandled_reloc, /* special_function */
1136 "R_PPC64_GOT16_LO_DS", /* name */
1137 FALSE, /* partial_inplace */
1138 0, /* src_mask */
1139 0xfffc, /* dst_mask */
1140 FALSE), /* pcrel_offset */
1141
1142 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1143 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1144 0, /* rightshift */
1145 1, /* size (0 = byte, 1 = short, 2 = long) */
1146 16, /* bitsize */
1147 FALSE, /* pc_relative */
1148 0, /* bitpos */
1149 complain_overflow_dont, /* complain_on_overflow */
1150 ppc64_elf_unhandled_reloc, /* special_function */
1151 "R_PPC64_PLT16_LO_DS", /* name */
1152 FALSE, /* partial_inplace */
1153 0, /* src_mask */
1154 0xfffc, /* dst_mask */
1155 FALSE), /* pcrel_offset */
1156
1157 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1158 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1159 0, /* rightshift */
1160 1, /* size (0 = byte, 1 = short, 2 = long) */
1161 16, /* bitsize */
1162 FALSE, /* pc_relative */
1163 0, /* bitpos */
1164 complain_overflow_bitfield, /* complain_on_overflow */
1165 ppc64_elf_sectoff_reloc, /* special_function */
1166 "R_PPC64_SECTOFF_DS", /* name */
1167 FALSE, /* partial_inplace */
1168 0, /* src_mask */
1169 0xfffc, /* dst_mask */
1170 FALSE), /* pcrel_offset */
1171
1172 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1173 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1174 0, /* rightshift */
1175 1, /* size (0 = byte, 1 = short, 2 = long) */
1176 16, /* bitsize */
1177 FALSE, /* pc_relative */
1178 0, /* bitpos */
1179 complain_overflow_dont, /* complain_on_overflow */
1180 ppc64_elf_sectoff_reloc, /* special_function */
1181 "R_PPC64_SECTOFF_LO_DS",/* name */
1182 FALSE, /* partial_inplace */
1183 0, /* src_mask */
1184 0xfffc, /* dst_mask */
1185 FALSE), /* pcrel_offset */
1186
1187 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1188 HOWTO (R_PPC64_TOC16_DS, /* type */
1189 0, /* rightshift */
1190 1, /* size (0 = byte, 1 = short, 2 = long) */
1191 16, /* bitsize */
1192 FALSE, /* pc_relative */
1193 0, /* bitpos */
1194 complain_overflow_signed, /* complain_on_overflow */
1195 ppc64_elf_toc_reloc, /* special_function */
1196 "R_PPC64_TOC16_DS", /* name */
1197 FALSE, /* partial_inplace */
1198 0, /* src_mask */
1199 0xfffc, /* dst_mask */
1200 FALSE), /* pcrel_offset */
1201
1202 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1203 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1204 0, /* rightshift */
1205 1, /* size (0 = byte, 1 = short, 2 = long) */
1206 16, /* bitsize */
1207 FALSE, /* pc_relative */
1208 0, /* bitpos */
1209 complain_overflow_dont, /* complain_on_overflow */
1210 ppc64_elf_toc_reloc, /* special_function */
1211 "R_PPC64_TOC16_LO_DS", /* name */
1212 FALSE, /* partial_inplace */
1213 0, /* src_mask */
1214 0xfffc, /* dst_mask */
1215 FALSE), /* pcrel_offset */
1216
1217 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1218 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1219 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1220 0, /* rightshift */
1221 1, /* size (0 = byte, 1 = short, 2 = long) */
1222 16, /* bitsize */
1223 FALSE, /* pc_relative */
1224 0, /* bitpos */
1225 complain_overflow_signed, /* complain_on_overflow */
1226 ppc64_elf_unhandled_reloc, /* special_function */
1227 "R_PPC64_PLTGOT16_DS", /* name */
1228 FALSE, /* partial_inplace */
1229 0, /* src_mask */
1230 0xfffc, /* dst_mask */
1231 FALSE), /* pcrel_offset */
1232
1233 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1234 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1235 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1236 0, /* rightshift */
1237 1, /* size (0 = byte, 1 = short, 2 = long) */
1238 16, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 ppc64_elf_unhandled_reloc, /* special_function */
1243 "R_PPC64_PLTGOT16_LO_DS",/* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xfffc, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* Marker relocs for TLS. */
1250 HOWTO (R_PPC64_TLS,
1251 0, /* rightshift */
1252 2, /* size (0 = byte, 1 = short, 2 = long) */
1253 32, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_dont, /* complain_on_overflow */
1257 bfd_elf_generic_reloc, /* special_function */
1258 "R_PPC64_TLS", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 HOWTO (R_PPC64_TLSGD,
1265 0, /* rightshift */
1266 2, /* size (0 = byte, 1 = short, 2 = long) */
1267 32, /* bitsize */
1268 FALSE, /* pc_relative */
1269 0, /* bitpos */
1270 complain_overflow_dont, /* complain_on_overflow */
1271 bfd_elf_generic_reloc, /* special_function */
1272 "R_PPC64_TLSGD", /* name */
1273 FALSE, /* partial_inplace */
1274 0, /* src_mask */
1275 0, /* dst_mask */
1276 FALSE), /* pcrel_offset */
1277
1278 HOWTO (R_PPC64_TLSLD,
1279 0, /* rightshift */
1280 2, /* size (0 = byte, 1 = short, 2 = long) */
1281 32, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_dont, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 "R_PPC64_TLSLD", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 HOWTO (R_PPC64_TOCSAVE,
1293 0, /* rightshift */
1294 2, /* size (0 = byte, 1 = short, 2 = long) */
1295 32, /* bitsize */
1296 FALSE, /* pc_relative */
1297 0, /* bitpos */
1298 complain_overflow_dont, /* complain_on_overflow */
1299 bfd_elf_generic_reloc, /* special_function */
1300 "R_PPC64_TOCSAVE", /* name */
1301 FALSE, /* partial_inplace */
1302 0, /* src_mask */
1303 0, /* dst_mask */
1304 FALSE), /* pcrel_offset */
1305
1306 /* Computes the load module index of the load module that contains the
1307 definition of its TLS sym. */
1308 HOWTO (R_PPC64_DTPMOD64,
1309 0, /* rightshift */
1310 4, /* size (0 = byte, 1 = short, 2 = long) */
1311 64, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 ppc64_elf_unhandled_reloc, /* special_function */
1316 "R_PPC64_DTPMOD64", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 ONES (64), /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 /* Computes a dtv-relative displacement, the difference between the value
1323 of sym+add and the base address of the thread-local storage block that
1324 contains the definition of sym, minus 0x8000. */
1325 HOWTO (R_PPC64_DTPREL64,
1326 0, /* rightshift */
1327 4, /* size (0 = byte, 1 = short, 2 = long) */
1328 64, /* bitsize */
1329 FALSE, /* pc_relative */
1330 0, /* bitpos */
1331 complain_overflow_dont, /* complain_on_overflow */
1332 ppc64_elf_unhandled_reloc, /* special_function */
1333 "R_PPC64_DTPREL64", /* name */
1334 FALSE, /* partial_inplace */
1335 0, /* src_mask */
1336 ONES (64), /* dst_mask */
1337 FALSE), /* pcrel_offset */
1338
1339 /* A 16 bit dtprel reloc. */
1340 HOWTO (R_PPC64_DTPREL16,
1341 0, /* rightshift */
1342 1, /* size (0 = byte, 1 = short, 2 = long) */
1343 16, /* bitsize */
1344 FALSE, /* pc_relative */
1345 0, /* bitpos */
1346 complain_overflow_signed, /* complain_on_overflow */
1347 ppc64_elf_unhandled_reloc, /* special_function */
1348 "R_PPC64_DTPREL16", /* name */
1349 FALSE, /* partial_inplace */
1350 0, /* src_mask */
1351 0xffff, /* dst_mask */
1352 FALSE), /* pcrel_offset */
1353
1354 /* Like DTPREL16, but no overflow. */
1355 HOWTO (R_PPC64_DTPREL16_LO,
1356 0, /* rightshift */
1357 1, /* size (0 = byte, 1 = short, 2 = long) */
1358 16, /* bitsize */
1359 FALSE, /* pc_relative */
1360 0, /* bitpos */
1361 complain_overflow_dont, /* complain_on_overflow */
1362 ppc64_elf_unhandled_reloc, /* special_function */
1363 "R_PPC64_DTPREL16_LO", /* name */
1364 FALSE, /* partial_inplace */
1365 0, /* src_mask */
1366 0xffff, /* dst_mask */
1367 FALSE), /* pcrel_offset */
1368
1369 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1370 HOWTO (R_PPC64_DTPREL16_HI,
1371 16, /* rightshift */
1372 1, /* size (0 = byte, 1 = short, 2 = long) */
1373 16, /* bitsize */
1374 FALSE, /* pc_relative */
1375 0, /* bitpos */
1376 complain_overflow_dont, /* complain_on_overflow */
1377 ppc64_elf_unhandled_reloc, /* special_function */
1378 "R_PPC64_DTPREL16_HI", /* name */
1379 FALSE, /* partial_inplace */
1380 0, /* src_mask */
1381 0xffff, /* dst_mask */
1382 FALSE), /* pcrel_offset */
1383
1384 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1385 HOWTO (R_PPC64_DTPREL16_HA,
1386 16, /* rightshift */
1387 1, /* size (0 = byte, 1 = short, 2 = long) */
1388 16, /* bitsize */
1389 FALSE, /* pc_relative */
1390 0, /* bitpos */
1391 complain_overflow_dont, /* complain_on_overflow */
1392 ppc64_elf_unhandled_reloc, /* special_function */
1393 "R_PPC64_DTPREL16_HA", /* name */
1394 FALSE, /* partial_inplace */
1395 0, /* src_mask */
1396 0xffff, /* dst_mask */
1397 FALSE), /* pcrel_offset */
1398
1399 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1400 HOWTO (R_PPC64_DTPREL16_HIGHER,
1401 32, /* rightshift */
1402 1, /* size (0 = byte, 1 = short, 2 = long) */
1403 16, /* bitsize */
1404 FALSE, /* pc_relative */
1405 0, /* bitpos */
1406 complain_overflow_dont, /* complain_on_overflow */
1407 ppc64_elf_unhandled_reloc, /* special_function */
1408 "R_PPC64_DTPREL16_HIGHER", /* name */
1409 FALSE, /* partial_inplace */
1410 0, /* src_mask */
1411 0xffff, /* dst_mask */
1412 FALSE), /* pcrel_offset */
1413
1414 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1415 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1416 32, /* rightshift */
1417 1, /* size (0 = byte, 1 = short, 2 = long) */
1418 16, /* bitsize */
1419 FALSE, /* pc_relative */
1420 0, /* bitpos */
1421 complain_overflow_dont, /* complain_on_overflow */
1422 ppc64_elf_unhandled_reloc, /* special_function */
1423 "R_PPC64_DTPREL16_HIGHERA", /* name */
1424 FALSE, /* partial_inplace */
1425 0, /* src_mask */
1426 0xffff, /* dst_mask */
1427 FALSE), /* pcrel_offset */
1428
1429 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1430 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1431 48, /* rightshift */
1432 1, /* size (0 = byte, 1 = short, 2 = long) */
1433 16, /* bitsize */
1434 FALSE, /* pc_relative */
1435 0, /* bitpos */
1436 complain_overflow_dont, /* complain_on_overflow */
1437 ppc64_elf_unhandled_reloc, /* special_function */
1438 "R_PPC64_DTPREL16_HIGHEST", /* name */
1439 FALSE, /* partial_inplace */
1440 0, /* src_mask */
1441 0xffff, /* dst_mask */
1442 FALSE), /* pcrel_offset */
1443
1444 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1445 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1446 48, /* rightshift */
1447 1, /* size (0 = byte, 1 = short, 2 = long) */
1448 16, /* bitsize */
1449 FALSE, /* pc_relative */
1450 0, /* bitpos */
1451 complain_overflow_dont, /* complain_on_overflow */
1452 ppc64_elf_unhandled_reloc, /* special_function */
1453 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1454 FALSE, /* partial_inplace */
1455 0, /* src_mask */
1456 0xffff, /* dst_mask */
1457 FALSE), /* pcrel_offset */
1458
1459 /* Like DTPREL16, but for insns with a DS field. */
1460 HOWTO (R_PPC64_DTPREL16_DS,
1461 0, /* rightshift */
1462 1, /* size (0 = byte, 1 = short, 2 = long) */
1463 16, /* bitsize */
1464 FALSE, /* pc_relative */
1465 0, /* bitpos */
1466 complain_overflow_signed, /* complain_on_overflow */
1467 ppc64_elf_unhandled_reloc, /* special_function */
1468 "R_PPC64_DTPREL16_DS", /* name */
1469 FALSE, /* partial_inplace */
1470 0, /* src_mask */
1471 0xfffc, /* dst_mask */
1472 FALSE), /* pcrel_offset */
1473
1474 /* Like DTPREL16_DS, but no overflow. */
1475 HOWTO (R_PPC64_DTPREL16_LO_DS,
1476 0, /* rightshift */
1477 1, /* size (0 = byte, 1 = short, 2 = long) */
1478 16, /* bitsize */
1479 FALSE, /* pc_relative */
1480 0, /* bitpos */
1481 complain_overflow_dont, /* complain_on_overflow */
1482 ppc64_elf_unhandled_reloc, /* special_function */
1483 "R_PPC64_DTPREL16_LO_DS", /* name */
1484 FALSE, /* partial_inplace */
1485 0, /* src_mask */
1486 0xfffc, /* dst_mask */
1487 FALSE), /* pcrel_offset */
1488
1489 /* Computes a tp-relative displacement, the difference between the value of
1490 sym+add and the value of the thread pointer (r13). */
1491 HOWTO (R_PPC64_TPREL64,
1492 0, /* rightshift */
1493 4, /* size (0 = byte, 1 = short, 2 = long) */
1494 64, /* bitsize */
1495 FALSE, /* pc_relative */
1496 0, /* bitpos */
1497 complain_overflow_dont, /* complain_on_overflow */
1498 ppc64_elf_unhandled_reloc, /* special_function */
1499 "R_PPC64_TPREL64", /* name */
1500 FALSE, /* partial_inplace */
1501 0, /* src_mask */
1502 ONES (64), /* dst_mask */
1503 FALSE), /* pcrel_offset */
1504
1505 /* A 16 bit tprel reloc. */
1506 HOWTO (R_PPC64_TPREL16,
1507 0, /* rightshift */
1508 1, /* size (0 = byte, 1 = short, 2 = long) */
1509 16, /* bitsize */
1510 FALSE, /* pc_relative */
1511 0, /* bitpos */
1512 complain_overflow_signed, /* complain_on_overflow */
1513 ppc64_elf_unhandled_reloc, /* special_function */
1514 "R_PPC64_TPREL16", /* name */
1515 FALSE, /* partial_inplace */
1516 0, /* src_mask */
1517 0xffff, /* dst_mask */
1518 FALSE), /* pcrel_offset */
1519
1520 /* Like TPREL16, but no overflow. */
1521 HOWTO (R_PPC64_TPREL16_LO,
1522 0, /* rightshift */
1523 1, /* size (0 = byte, 1 = short, 2 = long) */
1524 16, /* bitsize */
1525 FALSE, /* pc_relative */
1526 0, /* bitpos */
1527 complain_overflow_dont, /* complain_on_overflow */
1528 ppc64_elf_unhandled_reloc, /* special_function */
1529 "R_PPC64_TPREL16_LO", /* name */
1530 FALSE, /* partial_inplace */
1531 0, /* src_mask */
1532 0xffff, /* dst_mask */
1533 FALSE), /* pcrel_offset */
1534
1535 /* Like TPREL16_LO, but next higher group of 16 bits. */
1536 HOWTO (R_PPC64_TPREL16_HI,
1537 16, /* rightshift */
1538 1, /* size (0 = byte, 1 = short, 2 = long) */
1539 16, /* bitsize */
1540 FALSE, /* pc_relative */
1541 0, /* bitpos */
1542 complain_overflow_dont, /* complain_on_overflow */
1543 ppc64_elf_unhandled_reloc, /* special_function */
1544 "R_PPC64_TPREL16_HI", /* name */
1545 FALSE, /* partial_inplace */
1546 0, /* src_mask */
1547 0xffff, /* dst_mask */
1548 FALSE), /* pcrel_offset */
1549
1550 /* Like TPREL16_HI, but adjust for low 16 bits. */
1551 HOWTO (R_PPC64_TPREL16_HA,
1552 16, /* rightshift */
1553 1, /* size (0 = byte, 1 = short, 2 = long) */
1554 16, /* bitsize */
1555 FALSE, /* pc_relative */
1556 0, /* bitpos */
1557 complain_overflow_dont, /* complain_on_overflow */
1558 ppc64_elf_unhandled_reloc, /* special_function */
1559 "R_PPC64_TPREL16_HA", /* name */
1560 FALSE, /* partial_inplace */
1561 0, /* src_mask */
1562 0xffff, /* dst_mask */
1563 FALSE), /* pcrel_offset */
1564
1565 /* Like TPREL16_HI, but next higher group of 16 bits. */
1566 HOWTO (R_PPC64_TPREL16_HIGHER,
1567 32, /* rightshift */
1568 1, /* size (0 = byte, 1 = short, 2 = long) */
1569 16, /* bitsize */
1570 FALSE, /* pc_relative */
1571 0, /* bitpos */
1572 complain_overflow_dont, /* complain_on_overflow */
1573 ppc64_elf_unhandled_reloc, /* special_function */
1574 "R_PPC64_TPREL16_HIGHER", /* name */
1575 FALSE, /* partial_inplace */
1576 0, /* src_mask */
1577 0xffff, /* dst_mask */
1578 FALSE), /* pcrel_offset */
1579
1580 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1581 HOWTO (R_PPC64_TPREL16_HIGHERA,
1582 32, /* rightshift */
1583 1, /* size (0 = byte, 1 = short, 2 = long) */
1584 16, /* bitsize */
1585 FALSE, /* pc_relative */
1586 0, /* bitpos */
1587 complain_overflow_dont, /* complain_on_overflow */
1588 ppc64_elf_unhandled_reloc, /* special_function */
1589 "R_PPC64_TPREL16_HIGHERA", /* name */
1590 FALSE, /* partial_inplace */
1591 0, /* src_mask */
1592 0xffff, /* dst_mask */
1593 FALSE), /* pcrel_offset */
1594
1595 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1596 HOWTO (R_PPC64_TPREL16_HIGHEST,
1597 48, /* rightshift */
1598 1, /* size (0 = byte, 1 = short, 2 = long) */
1599 16, /* bitsize */
1600 FALSE, /* pc_relative */
1601 0, /* bitpos */
1602 complain_overflow_dont, /* complain_on_overflow */
1603 ppc64_elf_unhandled_reloc, /* special_function */
1604 "R_PPC64_TPREL16_HIGHEST", /* name */
1605 FALSE, /* partial_inplace */
1606 0, /* src_mask */
1607 0xffff, /* dst_mask */
1608 FALSE), /* pcrel_offset */
1609
1610 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1611 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1612 48, /* rightshift */
1613 1, /* size (0 = byte, 1 = short, 2 = long) */
1614 16, /* bitsize */
1615 FALSE, /* pc_relative */
1616 0, /* bitpos */
1617 complain_overflow_dont, /* complain_on_overflow */
1618 ppc64_elf_unhandled_reloc, /* special_function */
1619 "R_PPC64_TPREL16_HIGHESTA", /* name */
1620 FALSE, /* partial_inplace */
1621 0, /* src_mask */
1622 0xffff, /* dst_mask */
1623 FALSE), /* pcrel_offset */
1624
1625 /* Like TPREL16, but for insns with a DS field. */
1626 HOWTO (R_PPC64_TPREL16_DS,
1627 0, /* rightshift */
1628 1, /* size (0 = byte, 1 = short, 2 = long) */
1629 16, /* bitsize */
1630 FALSE, /* pc_relative */
1631 0, /* bitpos */
1632 complain_overflow_signed, /* complain_on_overflow */
1633 ppc64_elf_unhandled_reloc, /* special_function */
1634 "R_PPC64_TPREL16_DS", /* name */
1635 FALSE, /* partial_inplace */
1636 0, /* src_mask */
1637 0xfffc, /* dst_mask */
1638 FALSE), /* pcrel_offset */
1639
1640 /* Like TPREL16_DS, but no overflow. */
1641 HOWTO (R_PPC64_TPREL16_LO_DS,
1642 0, /* rightshift */
1643 1, /* size (0 = byte, 1 = short, 2 = long) */
1644 16, /* bitsize */
1645 FALSE, /* pc_relative */
1646 0, /* bitpos */
1647 complain_overflow_dont, /* complain_on_overflow */
1648 ppc64_elf_unhandled_reloc, /* special_function */
1649 "R_PPC64_TPREL16_LO_DS", /* name */
1650 FALSE, /* partial_inplace */
1651 0, /* src_mask */
1652 0xfffc, /* dst_mask */
1653 FALSE), /* pcrel_offset */
1654
1655 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1656 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1657 to the first entry relative to the TOC base (r2). */
1658 HOWTO (R_PPC64_GOT_TLSGD16,
1659 0, /* rightshift */
1660 1, /* size (0 = byte, 1 = short, 2 = long) */
1661 16, /* bitsize */
1662 FALSE, /* pc_relative */
1663 0, /* bitpos */
1664 complain_overflow_signed, /* complain_on_overflow */
1665 ppc64_elf_unhandled_reloc, /* special_function */
1666 "R_PPC64_GOT_TLSGD16", /* name */
1667 FALSE, /* partial_inplace */
1668 0, /* src_mask */
1669 0xffff, /* dst_mask */
1670 FALSE), /* pcrel_offset */
1671
1672 /* Like GOT_TLSGD16, but no overflow. */
1673 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1674 0, /* rightshift */
1675 1, /* size (0 = byte, 1 = short, 2 = long) */
1676 16, /* bitsize */
1677 FALSE, /* pc_relative */
1678 0, /* bitpos */
1679 complain_overflow_dont, /* complain_on_overflow */
1680 ppc64_elf_unhandled_reloc, /* special_function */
1681 "R_PPC64_GOT_TLSGD16_LO", /* name */
1682 FALSE, /* partial_inplace */
1683 0, /* src_mask */
1684 0xffff, /* dst_mask */
1685 FALSE), /* pcrel_offset */
1686
1687 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1688 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1689 16, /* rightshift */
1690 1, /* size (0 = byte, 1 = short, 2 = long) */
1691 16, /* bitsize */
1692 FALSE, /* pc_relative */
1693 0, /* bitpos */
1694 complain_overflow_dont, /* complain_on_overflow */
1695 ppc64_elf_unhandled_reloc, /* special_function */
1696 "R_PPC64_GOT_TLSGD16_HI", /* name */
1697 FALSE, /* partial_inplace */
1698 0, /* src_mask */
1699 0xffff, /* dst_mask */
1700 FALSE), /* pcrel_offset */
1701
1702 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1703 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1704 16, /* rightshift */
1705 1, /* size (0 = byte, 1 = short, 2 = long) */
1706 16, /* bitsize */
1707 FALSE, /* pc_relative */
1708 0, /* bitpos */
1709 complain_overflow_dont, /* complain_on_overflow */
1710 ppc64_elf_unhandled_reloc, /* special_function */
1711 "R_PPC64_GOT_TLSGD16_HA", /* name */
1712 FALSE, /* partial_inplace */
1713 0, /* src_mask */
1714 0xffff, /* dst_mask */
1715 FALSE), /* pcrel_offset */
1716
1717 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1718 with values (sym+add)@dtpmod and zero, and computes the offset to the
1719 first entry relative to the TOC base (r2). */
1720 HOWTO (R_PPC64_GOT_TLSLD16,
1721 0, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 FALSE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_signed, /* complain_on_overflow */
1727 ppc64_elf_unhandled_reloc, /* special_function */
1728 "R_PPC64_GOT_TLSLD16", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 FALSE), /* pcrel_offset */
1733
1734 /* Like GOT_TLSLD16, but no overflow. */
1735 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1736 0, /* rightshift */
1737 1, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 FALSE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 ppc64_elf_unhandled_reloc, /* special_function */
1743 "R_PPC64_GOT_TLSLD16_LO", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0xffff, /* dst_mask */
1747 FALSE), /* pcrel_offset */
1748
1749 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1750 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1751 16, /* rightshift */
1752 1, /* size (0 = byte, 1 = short, 2 = long) */
1753 16, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 ppc64_elf_unhandled_reloc, /* special_function */
1758 "R_PPC64_GOT_TLSLD16_HI", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0xffff, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1765 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1766 16, /* rightshift */
1767 1, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_dont, /* complain_on_overflow */
1772 ppc64_elf_unhandled_reloc, /* special_function */
1773 "R_PPC64_GOT_TLSLD16_HA", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0xffff, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1780 the offset to the entry relative to the TOC base (r2). */
1781 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1782 0, /* rightshift */
1783 1, /* size (0 = byte, 1 = short, 2 = long) */
1784 16, /* bitsize */
1785 FALSE, /* pc_relative */
1786 0, /* bitpos */
1787 complain_overflow_signed, /* complain_on_overflow */
1788 ppc64_elf_unhandled_reloc, /* special_function */
1789 "R_PPC64_GOT_DTPREL16_DS", /* name */
1790 FALSE, /* partial_inplace */
1791 0, /* src_mask */
1792 0xfffc, /* dst_mask */
1793 FALSE), /* pcrel_offset */
1794
1795 /* Like GOT_DTPREL16_DS, but no overflow. */
1796 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1797 0, /* rightshift */
1798 1, /* size (0 = byte, 1 = short, 2 = long) */
1799 16, /* bitsize */
1800 FALSE, /* pc_relative */
1801 0, /* bitpos */
1802 complain_overflow_dont, /* complain_on_overflow */
1803 ppc64_elf_unhandled_reloc, /* special_function */
1804 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1805 FALSE, /* partial_inplace */
1806 0, /* src_mask */
1807 0xfffc, /* dst_mask */
1808 FALSE), /* pcrel_offset */
1809
1810 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1811 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1812 16, /* rightshift */
1813 1, /* size (0 = byte, 1 = short, 2 = long) */
1814 16, /* bitsize */
1815 FALSE, /* pc_relative */
1816 0, /* bitpos */
1817 complain_overflow_dont, /* complain_on_overflow */
1818 ppc64_elf_unhandled_reloc, /* special_function */
1819 "R_PPC64_GOT_DTPREL16_HI", /* name */
1820 FALSE, /* partial_inplace */
1821 0, /* src_mask */
1822 0xffff, /* dst_mask */
1823 FALSE), /* pcrel_offset */
1824
1825 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1826 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1827 16, /* rightshift */
1828 1, /* size (0 = byte, 1 = short, 2 = long) */
1829 16, /* bitsize */
1830 FALSE, /* pc_relative */
1831 0, /* bitpos */
1832 complain_overflow_dont, /* complain_on_overflow */
1833 ppc64_elf_unhandled_reloc, /* special_function */
1834 "R_PPC64_GOT_DTPREL16_HA", /* name */
1835 FALSE, /* partial_inplace */
1836 0, /* src_mask */
1837 0xffff, /* dst_mask */
1838 FALSE), /* pcrel_offset */
1839
1840 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1841 offset to the entry relative to the TOC base (r2). */
1842 HOWTO (R_PPC64_GOT_TPREL16_DS,
1843 0, /* rightshift */
1844 1, /* size (0 = byte, 1 = short, 2 = long) */
1845 16, /* bitsize */
1846 FALSE, /* pc_relative */
1847 0, /* bitpos */
1848 complain_overflow_signed, /* complain_on_overflow */
1849 ppc64_elf_unhandled_reloc, /* special_function */
1850 "R_PPC64_GOT_TPREL16_DS", /* name */
1851 FALSE, /* partial_inplace */
1852 0, /* src_mask */
1853 0xfffc, /* dst_mask */
1854 FALSE), /* pcrel_offset */
1855
1856 /* Like GOT_TPREL16_DS, but no overflow. */
1857 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1858 0, /* rightshift */
1859 1, /* size (0 = byte, 1 = short, 2 = long) */
1860 16, /* bitsize */
1861 FALSE, /* pc_relative */
1862 0, /* bitpos */
1863 complain_overflow_dont, /* complain_on_overflow */
1864 ppc64_elf_unhandled_reloc, /* special_function */
1865 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1866 FALSE, /* partial_inplace */
1867 0, /* src_mask */
1868 0xfffc, /* dst_mask */
1869 FALSE), /* pcrel_offset */
1870
1871 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1872 HOWTO (R_PPC64_GOT_TPREL16_HI,
1873 16, /* rightshift */
1874 1, /* size (0 = byte, 1 = short, 2 = long) */
1875 16, /* bitsize */
1876 FALSE, /* pc_relative */
1877 0, /* bitpos */
1878 complain_overflow_dont, /* complain_on_overflow */
1879 ppc64_elf_unhandled_reloc, /* special_function */
1880 "R_PPC64_GOT_TPREL16_HI", /* name */
1881 FALSE, /* partial_inplace */
1882 0, /* src_mask */
1883 0xffff, /* dst_mask */
1884 FALSE), /* pcrel_offset */
1885
1886 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1887 HOWTO (R_PPC64_GOT_TPREL16_HA,
1888 16, /* rightshift */
1889 1, /* size (0 = byte, 1 = short, 2 = long) */
1890 16, /* bitsize */
1891 FALSE, /* pc_relative */
1892 0, /* bitpos */
1893 complain_overflow_dont, /* complain_on_overflow */
1894 ppc64_elf_unhandled_reloc, /* special_function */
1895 "R_PPC64_GOT_TPREL16_HA", /* name */
1896 FALSE, /* partial_inplace */
1897 0, /* src_mask */
1898 0xffff, /* dst_mask */
1899 FALSE), /* pcrel_offset */
1900
1901 HOWTO (R_PPC64_JMP_IREL, /* type */
1902 0, /* rightshift */
1903 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1904 0, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_JMP_IREL", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 HOWTO (R_PPC64_IRELATIVE, /* type */
1916 0, /* rightshift */
1917 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1918 64, /* bitsize */
1919 FALSE, /* pc_relative */
1920 0, /* bitpos */
1921 complain_overflow_dont, /* complain_on_overflow */
1922 bfd_elf_generic_reloc, /* special_function */
1923 "R_PPC64_IRELATIVE", /* name */
1924 FALSE, /* partial_inplace */
1925 0, /* src_mask */
1926 ONES (64), /* dst_mask */
1927 FALSE), /* pcrel_offset */
1928
1929 /* A 16 bit relative relocation. */
1930 HOWTO (R_PPC64_REL16, /* type */
1931 0, /* rightshift */
1932 1, /* size (0 = byte, 1 = short, 2 = long) */
1933 16, /* bitsize */
1934 TRUE, /* pc_relative */
1935 0, /* bitpos */
1936 complain_overflow_bitfield, /* complain_on_overflow */
1937 bfd_elf_generic_reloc, /* special_function */
1938 "R_PPC64_REL16", /* name */
1939 FALSE, /* partial_inplace */
1940 0, /* src_mask */
1941 0xffff, /* dst_mask */
1942 TRUE), /* pcrel_offset */
1943
1944 /* A 16 bit relative relocation without overflow. */
1945 HOWTO (R_PPC64_REL16_LO, /* type */
1946 0, /* rightshift */
1947 1, /* size (0 = byte, 1 = short, 2 = long) */
1948 16, /* bitsize */
1949 TRUE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont,/* complain_on_overflow */
1952 bfd_elf_generic_reloc, /* special_function */
1953 "R_PPC64_REL16_LO", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0xffff, /* dst_mask */
1957 TRUE), /* pcrel_offset */
1958
1959 /* The high order 16 bits of a relative address. */
1960 HOWTO (R_PPC64_REL16_HI, /* type */
1961 16, /* rightshift */
1962 1, /* size (0 = byte, 1 = short, 2 = long) */
1963 16, /* bitsize */
1964 TRUE, /* pc_relative */
1965 0, /* bitpos */
1966 complain_overflow_dont, /* complain_on_overflow */
1967 bfd_elf_generic_reloc, /* special_function */
1968 "R_PPC64_REL16_HI", /* name */
1969 FALSE, /* partial_inplace */
1970 0, /* src_mask */
1971 0xffff, /* dst_mask */
1972 TRUE), /* pcrel_offset */
1973
1974 /* The high order 16 bits of a relative address, plus 1 if the contents of
1975 the low 16 bits, treated as a signed number, is negative. */
1976 HOWTO (R_PPC64_REL16_HA, /* type */
1977 16, /* rightshift */
1978 1, /* size (0 = byte, 1 = short, 2 = long) */
1979 16, /* bitsize */
1980 TRUE, /* pc_relative */
1981 0, /* bitpos */
1982 complain_overflow_dont, /* complain_on_overflow */
1983 ppc64_elf_ha_reloc, /* special_function */
1984 "R_PPC64_REL16_HA", /* name */
1985 FALSE, /* partial_inplace */
1986 0, /* src_mask */
1987 0xffff, /* dst_mask */
1988 TRUE), /* pcrel_offset */
1989
1990 /* GNU extension to record C++ vtable hierarchy. */
1991 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1992 0, /* rightshift */
1993 0, /* size (0 = byte, 1 = short, 2 = long) */
1994 0, /* bitsize */
1995 FALSE, /* pc_relative */
1996 0, /* bitpos */
1997 complain_overflow_dont, /* complain_on_overflow */
1998 NULL, /* special_function */
1999 "R_PPC64_GNU_VTINHERIT", /* name */
2000 FALSE, /* partial_inplace */
2001 0, /* src_mask */
2002 0, /* dst_mask */
2003 FALSE), /* pcrel_offset */
2004
2005 /* GNU extension to record C++ vtable member usage. */
2006 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2007 0, /* rightshift */
2008 0, /* size (0 = byte, 1 = short, 2 = long) */
2009 0, /* bitsize */
2010 FALSE, /* pc_relative */
2011 0, /* bitpos */
2012 complain_overflow_dont, /* complain_on_overflow */
2013 NULL, /* special_function */
2014 "R_PPC64_GNU_VTENTRY", /* name */
2015 FALSE, /* partial_inplace */
2016 0, /* src_mask */
2017 0, /* dst_mask */
2018 FALSE), /* pcrel_offset */
2019 };
2020
2021 \f
2022 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2023 be done. */
2024
2025 static void
2026 ppc_howto_init (void)
2027 {
2028 unsigned int i, type;
2029
2030 for (i = 0;
2031 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2032 i++)
2033 {
2034 type = ppc64_elf_howto_raw[i].type;
2035 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2036 / sizeof (ppc64_elf_howto_table[0])));
2037 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2038 }
2039 }
2040
2041 static reloc_howto_type *
2042 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2043 bfd_reloc_code_real_type code)
2044 {
2045 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2046
2047 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2048 /* Initialize howto table if needed. */
2049 ppc_howto_init ();
2050
2051 switch (code)
2052 {
2053 default:
2054 return NULL;
2055
2056 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2057 break;
2058 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2059 break;
2060 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2061 break;
2062 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2063 break;
2064 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2065 break;
2066 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2067 break;
2068 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2069 break;
2070 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2071 break;
2072 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2073 break;
2074 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2075 break;
2076 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2077 break;
2078 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2079 break;
2080 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2081 break;
2082 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2083 break;
2084 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2085 break;
2086 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2087 break;
2088 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2089 break;
2090 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2091 break;
2092 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2093 break;
2094 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2095 break;
2096 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2097 break;
2098 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2099 break;
2100 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2101 break;
2102 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2103 break;
2104 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2105 break;
2106 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2107 break;
2108 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2109 break;
2110 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2111 break;
2112 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2113 break;
2114 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2115 break;
2116 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2117 break;
2118 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2119 break;
2120 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2121 break;
2122 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2123 break;
2124 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2125 break;
2126 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2127 break;
2128 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2129 break;
2130 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2131 break;
2132 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2133 break;
2134 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2135 break;
2136 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2137 break;
2138 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2139 break;
2140 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2141 break;
2142 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2143 break;
2144 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2145 break;
2146 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2149 break;
2150 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2151 break;
2152 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2153 break;
2154 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2155 break;
2156 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2157 break;
2158 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2159 break;
2160 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2161 break;
2162 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2163 break;
2164 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2165 break;
2166 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2167 break;
2168 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2169 break;
2170 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2171 break;
2172 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2173 break;
2174 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2175 break;
2176 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2177 break;
2178 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2179 break;
2180 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2181 break;
2182 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2183 break;
2184 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2185 break;
2186 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2187 break;
2188 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2189 break;
2190 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2191 break;
2192 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2193 break;
2194 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2195 break;
2196 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2197 break;
2198 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2199 break;
2200 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2201 break;
2202 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2203 break;
2204 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2205 break;
2206 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2207 break;
2208 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2209 break;
2210 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2211 break;
2212 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2213 break;
2214 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2215 break;
2216 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2217 break;
2218 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2219 break;
2220 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2221 break;
2222 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2223 break;
2224 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2225 break;
2226 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2227 break;
2228 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2229 break;
2230 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2231 break;
2232 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2233 break;
2234 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2235 break;
2236 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2237 break;
2238 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2239 break;
2240 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2241 break;
2242 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2243 break;
2244 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2245 break;
2246 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2247 break;
2248 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2249 break;
2250 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2251 break;
2252 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2253 break;
2254 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2255 break;
2256 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2257 break;
2258 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2259 break;
2260 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2261 break;
2262 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2263 break;
2264 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2265 break;
2266 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2267 break;
2268 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2269 break;
2270 }
2271
2272 return ppc64_elf_howto_table[r];
2273 };
2274
2275 static reloc_howto_type *
2276 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2277 const char *r_name)
2278 {
2279 unsigned int i;
2280
2281 for (i = 0;
2282 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2283 i++)
2284 if (ppc64_elf_howto_raw[i].name != NULL
2285 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2286 return &ppc64_elf_howto_raw[i];
2287
2288 return NULL;
2289 }
2290
2291 /* Set the howto pointer for a PowerPC ELF reloc. */
2292
2293 static void
2294 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2295 Elf_Internal_Rela *dst)
2296 {
2297 unsigned int type;
2298
2299 /* Initialize howto table if needed. */
2300 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2301 ppc_howto_init ();
2302
2303 type = ELF64_R_TYPE (dst->r_info);
2304 if (type >= (sizeof (ppc64_elf_howto_table)
2305 / sizeof (ppc64_elf_howto_table[0])))
2306 {
2307 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2308 abfd, (int) type);
2309 type = R_PPC64_NONE;
2310 }
2311 cache_ptr->howto = ppc64_elf_howto_table[type];
2312 }
2313
2314 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2315
2316 static bfd_reloc_status_type
2317 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2318 void *data, asection *input_section,
2319 bfd *output_bfd, char **error_message)
2320 {
2321 /* If this is a relocatable link (output_bfd test tells us), just
2322 call the generic function. Any adjustment will be done at final
2323 link time. */
2324 if (output_bfd != NULL)
2325 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2326 input_section, output_bfd, error_message);
2327
2328 /* Adjust the addend for sign extension of the low 16 bits.
2329 We won't actually be using the low 16 bits, so trashing them
2330 doesn't matter. */
2331 reloc_entry->addend += 0x8000;
2332 return bfd_reloc_continue;
2333 }
2334
2335 static bfd_reloc_status_type
2336 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2337 void *data, asection *input_section,
2338 bfd *output_bfd, char **error_message)
2339 {
2340 if (output_bfd != NULL)
2341 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2342 input_section, output_bfd, error_message);
2343
2344 if (strcmp (symbol->section->name, ".opd") == 0
2345 && (symbol->section->owner->flags & DYNAMIC) == 0)
2346 {
2347 bfd_vma dest = opd_entry_value (symbol->section,
2348 symbol->value + reloc_entry->addend,
2349 NULL, NULL);
2350 if (dest != (bfd_vma) -1)
2351 reloc_entry->addend = dest - (symbol->value
2352 + symbol->section->output_section->vma
2353 + symbol->section->output_offset);
2354 }
2355 return bfd_reloc_continue;
2356 }
2357
2358 static bfd_reloc_status_type
2359 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2360 void *data, asection *input_section,
2361 bfd *output_bfd, char **error_message)
2362 {
2363 long insn;
2364 enum elf_ppc64_reloc_type r_type;
2365 bfd_size_type octets;
2366 /* Assume 'at' branch hints. */
2367 bfd_boolean is_isa_v2 = TRUE;
2368
2369 /* If this is a relocatable link (output_bfd test tells us), just
2370 call the generic function. Any adjustment will be done at final
2371 link time. */
2372 if (output_bfd != NULL)
2373 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2374 input_section, output_bfd, error_message);
2375
2376 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2377 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2378 insn &= ~(0x01 << 21);
2379 r_type = reloc_entry->howto->type;
2380 if (r_type == R_PPC64_ADDR14_BRTAKEN
2381 || r_type == R_PPC64_REL14_BRTAKEN)
2382 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2383
2384 if (is_isa_v2)
2385 {
2386 /* Set 'a' bit. This is 0b00010 in BO field for branch
2387 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2388 for branch on CTR insns (BO == 1a00t or 1a01t). */
2389 if ((insn & (0x14 << 21)) == (0x04 << 21))
2390 insn |= 0x02 << 21;
2391 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2392 insn |= 0x08 << 21;
2393 else
2394 goto out;
2395 }
2396 else
2397 {
2398 bfd_vma target = 0;
2399 bfd_vma from;
2400
2401 if (!bfd_is_com_section (symbol->section))
2402 target = symbol->value;
2403 target += symbol->section->output_section->vma;
2404 target += symbol->section->output_offset;
2405 target += reloc_entry->addend;
2406
2407 from = (reloc_entry->address
2408 + input_section->output_offset
2409 + input_section->output_section->vma);
2410
2411 /* Invert 'y' bit if not the default. */
2412 if ((bfd_signed_vma) (target - from) < 0)
2413 insn ^= 0x01 << 21;
2414 }
2415 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2416 out:
2417 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2418 input_section, output_bfd, error_message);
2419 }
2420
2421 static bfd_reloc_status_type
2422 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2423 void *data, asection *input_section,
2424 bfd *output_bfd, char **error_message)
2425 {
2426 /* If this is a relocatable link (output_bfd test tells us), just
2427 call the generic function. Any adjustment will be done at final
2428 link time. */
2429 if (output_bfd != NULL)
2430 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2431 input_section, output_bfd, error_message);
2432
2433 /* Subtract the symbol section base address. */
2434 reloc_entry->addend -= symbol->section->output_section->vma;
2435 return bfd_reloc_continue;
2436 }
2437
2438 static bfd_reloc_status_type
2439 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2440 void *data, asection *input_section,
2441 bfd *output_bfd, char **error_message)
2442 {
2443 /* If this is a relocatable link (output_bfd test tells us), just
2444 call the generic function. Any adjustment will be done at final
2445 link time. */
2446 if (output_bfd != NULL)
2447 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2448 input_section, output_bfd, error_message);
2449
2450 /* Subtract the symbol section base address. */
2451 reloc_entry->addend -= symbol->section->output_section->vma;
2452
2453 /* Adjust the addend for sign extension of the low 16 bits. */
2454 reloc_entry->addend += 0x8000;
2455 return bfd_reloc_continue;
2456 }
2457
2458 static bfd_reloc_status_type
2459 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2460 void *data, asection *input_section,
2461 bfd *output_bfd, char **error_message)
2462 {
2463 bfd_vma TOCstart;
2464
2465 /* If this is a relocatable link (output_bfd test tells us), just
2466 call the generic function. Any adjustment will be done at final
2467 link time. */
2468 if (output_bfd != NULL)
2469 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2470 input_section, output_bfd, error_message);
2471
2472 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2473 if (TOCstart == 0)
2474 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2475
2476 /* Subtract the TOC base address. */
2477 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2478 return bfd_reloc_continue;
2479 }
2480
2481 static bfd_reloc_status_type
2482 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2483 void *data, asection *input_section,
2484 bfd *output_bfd, char **error_message)
2485 {
2486 bfd_vma TOCstart;
2487
2488 /* If this is a relocatable link (output_bfd test tells us), just
2489 call the generic function. Any adjustment will be done at final
2490 link time. */
2491 if (output_bfd != NULL)
2492 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2493 input_section, output_bfd, error_message);
2494
2495 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2496 if (TOCstart == 0)
2497 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2498
2499 /* Subtract the TOC base address. */
2500 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2501
2502 /* Adjust the addend for sign extension of the low 16 bits. */
2503 reloc_entry->addend += 0x8000;
2504 return bfd_reloc_continue;
2505 }
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 bfd_vma TOCstart;
2513 bfd_size_type octets;
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 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2523 if (TOCstart == 0)
2524 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2525
2526 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2527 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2528 return bfd_reloc_ok;
2529 }
2530
2531 static bfd_reloc_status_type
2532 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2533 void *data, asection *input_section,
2534 bfd *output_bfd, char **error_message)
2535 {
2536 /* If this is a relocatable link (output_bfd test tells us), just
2537 call the generic function. Any adjustment will be done at final
2538 link time. */
2539 if (output_bfd != NULL)
2540 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2541 input_section, output_bfd, error_message);
2542
2543 if (error_message != NULL)
2544 {
2545 static char buf[60];
2546 sprintf (buf, "generic linker can't handle %s",
2547 reloc_entry->howto->name);
2548 *error_message = buf;
2549 }
2550 return bfd_reloc_dangerous;
2551 }
2552
2553 /* Track GOT entries needed for a given symbol. We might need more
2554 than one got entry per symbol. */
2555 struct got_entry
2556 {
2557 struct got_entry *next;
2558
2559 /* The symbol addend that we'll be placing in the GOT. */
2560 bfd_vma addend;
2561
2562 /* Unlike other ELF targets, we use separate GOT entries for the same
2563 symbol referenced from different input files. This is to support
2564 automatic multiple TOC/GOT sections, where the TOC base can vary
2565 from one input file to another. After partitioning into TOC groups
2566 we merge entries within the group.
2567
2568 Point to the BFD owning this GOT entry. */
2569 bfd *owner;
2570
2571 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2572 TLS_TPREL or TLS_DTPREL for tls entries. */
2573 unsigned char tls_type;
2574
2575 /* Non-zero if got.ent points to real entry. */
2576 unsigned char is_indirect;
2577
2578 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2579 union
2580 {
2581 bfd_signed_vma refcount;
2582 bfd_vma offset;
2583 struct got_entry *ent;
2584 } got;
2585 };
2586
2587 /* The same for PLT. */
2588 struct plt_entry
2589 {
2590 struct plt_entry *next;
2591
2592 bfd_vma addend;
2593
2594 union
2595 {
2596 bfd_signed_vma refcount;
2597 bfd_vma offset;
2598 } plt;
2599 };
2600
2601 struct ppc64_elf_obj_tdata
2602 {
2603 struct elf_obj_tdata elf;
2604
2605 /* Shortcuts to dynamic linker sections. */
2606 asection *got;
2607 asection *relgot;
2608
2609 /* Used during garbage collection. We attach global symbols defined
2610 on removed .opd entries to this section so that the sym is removed. */
2611 asection *deleted_section;
2612
2613 /* TLS local dynamic got entry handling. Support for multiple GOT
2614 sections means we potentially need one of these for each input bfd. */
2615 struct got_entry tlsld_got;
2616
2617 /* A copy of relocs before they are modified for --emit-relocs. */
2618 Elf_Internal_Rela *opd_relocs;
2619
2620 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2621 the reloc to be in the range -32768 to 32767. */
2622 unsigned int has_small_toc_reloc : 1;
2623
2624 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2625 instruction not one we handle. */
2626 unsigned int unexpected_toc_insn : 1;
2627 };
2628
2629 #define ppc64_elf_tdata(bfd) \
2630 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2631
2632 #define ppc64_tlsld_got(bfd) \
2633 (&ppc64_elf_tdata (bfd)->tlsld_got)
2634
2635 #define is_ppc64_elf(bfd) \
2636 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2637 && elf_object_id (bfd) == PPC64_ELF_DATA)
2638
2639 /* Override the generic function because we store some extras. */
2640
2641 static bfd_boolean
2642 ppc64_elf_mkobject (bfd *abfd)
2643 {
2644 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2645 PPC64_ELF_DATA);
2646 }
2647
2648 /* Fix bad default arch selected for a 64 bit input bfd when the
2649 default is 32 bit. */
2650
2651 static bfd_boolean
2652 ppc64_elf_object_p (bfd *abfd)
2653 {
2654 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2655 {
2656 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2657
2658 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2659 {
2660 /* Relies on arch after 32 bit default being 64 bit default. */
2661 abfd->arch_info = abfd->arch_info->next;
2662 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2663 }
2664 }
2665 return TRUE;
2666 }
2667
2668 /* Support for core dump NOTE sections. */
2669
2670 static bfd_boolean
2671 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2672 {
2673 size_t offset, size;
2674
2675 if (note->descsz != 504)
2676 return FALSE;
2677
2678 /* pr_cursig */
2679 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2680
2681 /* pr_pid */
2682 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2683
2684 /* pr_reg */
2685 offset = 112;
2686 size = 384;
2687
2688 /* Make a ".reg/999" section. */
2689 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2690 size, note->descpos + offset);
2691 }
2692
2693 static bfd_boolean
2694 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2695 {
2696 if (note->descsz != 136)
2697 return FALSE;
2698
2699 elf_tdata (abfd)->core_pid
2700 = bfd_get_32 (abfd, note->descdata + 24);
2701 elf_tdata (abfd)->core_program
2702 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2703 elf_tdata (abfd)->core_command
2704 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2705
2706 return TRUE;
2707 }
2708
2709 static char *
2710 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2711 ...)
2712 {
2713 switch (note_type)
2714 {
2715 default:
2716 return NULL;
2717
2718 case NT_PRPSINFO:
2719 {
2720 char data[136];
2721 va_list ap;
2722
2723 va_start (ap, note_type);
2724 memset (data, 0, 40);
2725 strncpy (data + 40, va_arg (ap, const char *), 16);
2726 strncpy (data + 56, va_arg (ap, const char *), 80);
2727 va_end (ap);
2728 return elfcore_write_note (abfd, buf, bufsiz,
2729 "CORE", note_type, data, sizeof (data));
2730 }
2731
2732 case NT_PRSTATUS:
2733 {
2734 char data[504];
2735 va_list ap;
2736 long pid;
2737 int cursig;
2738 const void *greg;
2739
2740 va_start (ap, note_type);
2741 memset (data, 0, 112);
2742 pid = va_arg (ap, long);
2743 bfd_put_32 (abfd, pid, data + 32);
2744 cursig = va_arg (ap, int);
2745 bfd_put_16 (abfd, cursig, data + 12);
2746 greg = va_arg (ap, const void *);
2747 memcpy (data + 112, greg, 384);
2748 memset (data + 496, 0, 8);
2749 va_end (ap);
2750 return elfcore_write_note (abfd, buf, bufsiz,
2751 "CORE", note_type, data, sizeof (data));
2752 }
2753 }
2754 }
2755
2756 /* Add extra PPC sections. */
2757
2758 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2759 {
2760 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2761 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2762 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2766 { NULL, 0, 0, 0, 0 }
2767 };
2768
2769 enum _ppc64_sec_type {
2770 sec_normal = 0,
2771 sec_opd = 1,
2772 sec_toc = 2
2773 };
2774
2775 struct _ppc64_elf_section_data
2776 {
2777 struct bfd_elf_section_data elf;
2778
2779 union
2780 {
2781 /* An array with one entry for each opd function descriptor. */
2782 struct _opd_sec_data
2783 {
2784 /* Points to the function code section for local opd entries. */
2785 asection **func_sec;
2786
2787 /* After editing .opd, adjust references to opd local syms. */
2788 long *adjust;
2789 } opd;
2790
2791 /* An array for toc sections, indexed by offset/8. */
2792 struct _toc_sec_data
2793 {
2794 /* Specifies the relocation symbol index used at a given toc offset. */
2795 unsigned *symndx;
2796
2797 /* And the relocation addend. */
2798 bfd_vma *add;
2799 } toc;
2800 } u;
2801
2802 enum _ppc64_sec_type sec_type:2;
2803
2804 /* Flag set when small branches are detected. Used to
2805 select suitable defaults for the stub group size. */
2806 unsigned int has_14bit_branch:1;
2807 };
2808
2809 #define ppc64_elf_section_data(sec) \
2810 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2811
2812 static bfd_boolean
2813 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2814 {
2815 if (!sec->used_by_bfd)
2816 {
2817 struct _ppc64_elf_section_data *sdata;
2818 bfd_size_type amt = sizeof (*sdata);
2819
2820 sdata = bfd_zalloc (abfd, amt);
2821 if (sdata == NULL)
2822 return FALSE;
2823 sec->used_by_bfd = sdata;
2824 }
2825
2826 return _bfd_elf_new_section_hook (abfd, sec);
2827 }
2828
2829 static struct _opd_sec_data *
2830 get_opd_info (asection * sec)
2831 {
2832 if (sec != NULL
2833 && ppc64_elf_section_data (sec) != NULL
2834 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2835 return &ppc64_elf_section_data (sec)->u.opd;
2836 return NULL;
2837 }
2838 \f
2839 /* Parameters for the qsort hook. */
2840 static bfd_boolean synthetic_relocatable;
2841
2842 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2843
2844 static int
2845 compare_symbols (const void *ap, const void *bp)
2846 {
2847 const asymbol *a = * (const asymbol **) ap;
2848 const asymbol *b = * (const asymbol **) bp;
2849
2850 /* Section symbols first. */
2851 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2852 return -1;
2853 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2854 return 1;
2855
2856 /* then .opd symbols. */
2857 if (strcmp (a->section->name, ".opd") == 0
2858 && strcmp (b->section->name, ".opd") != 0)
2859 return -1;
2860 if (strcmp (a->section->name, ".opd") != 0
2861 && strcmp (b->section->name, ".opd") == 0)
2862 return 1;
2863
2864 /* then other code symbols. */
2865 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2866 == (SEC_CODE | SEC_ALLOC)
2867 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2868 != (SEC_CODE | SEC_ALLOC))
2869 return -1;
2870
2871 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2872 != (SEC_CODE | SEC_ALLOC)
2873 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2874 == (SEC_CODE | SEC_ALLOC))
2875 return 1;
2876
2877 if (synthetic_relocatable)
2878 {
2879 if (a->section->id < b->section->id)
2880 return -1;
2881
2882 if (a->section->id > b->section->id)
2883 return 1;
2884 }
2885
2886 if (a->value + a->section->vma < b->value + b->section->vma)
2887 return -1;
2888
2889 if (a->value + a->section->vma > b->value + b->section->vma)
2890 return 1;
2891
2892 /* For syms with the same value, prefer strong dynamic global function
2893 syms over other syms. */
2894 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2895 return -1;
2896
2897 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2898 return 1;
2899
2900 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2901 return -1;
2902
2903 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2904 return 1;
2905
2906 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2907 return -1;
2908
2909 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2910 return 1;
2911
2912 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2913 return -1;
2914
2915 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2916 return 1;
2917
2918 return 0;
2919 }
2920
2921 /* Search SYMS for a symbol of the given VALUE. */
2922
2923 static asymbol *
2924 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2925 {
2926 long mid;
2927
2928 if (id == -1)
2929 {
2930 while (lo < hi)
2931 {
2932 mid = (lo + hi) >> 1;
2933 if (syms[mid]->value + syms[mid]->section->vma < value)
2934 lo = mid + 1;
2935 else if (syms[mid]->value + syms[mid]->section->vma > value)
2936 hi = mid;
2937 else
2938 return syms[mid];
2939 }
2940 }
2941 else
2942 {
2943 while (lo < hi)
2944 {
2945 mid = (lo + hi) >> 1;
2946 if (syms[mid]->section->id < id)
2947 lo = mid + 1;
2948 else if (syms[mid]->section->id > id)
2949 hi = mid;
2950 else if (syms[mid]->value < value)
2951 lo = mid + 1;
2952 else if (syms[mid]->value > value)
2953 hi = mid;
2954 else
2955 return syms[mid];
2956 }
2957 }
2958 return NULL;
2959 }
2960
2961 static bfd_boolean
2962 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2963 {
2964 bfd_vma vma = *(bfd_vma *) ptr;
2965 return ((section->flags & SEC_ALLOC) != 0
2966 && section->vma <= vma
2967 && vma < section->vma + section->size);
2968 }
2969
2970 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2971 entry syms. Also generate @plt symbols for the glink branch table. */
2972
2973 static long
2974 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2975 long static_count, asymbol **static_syms,
2976 long dyn_count, asymbol **dyn_syms,
2977 asymbol **ret)
2978 {
2979 asymbol *s;
2980 long i;
2981 long count;
2982 char *names;
2983 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2984 asection *opd;
2985 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2986 asymbol **syms;
2987
2988 *ret = NULL;
2989
2990 opd = bfd_get_section_by_name (abfd, ".opd");
2991 if (opd == NULL)
2992 return 0;
2993
2994 symcount = static_count;
2995 if (!relocatable)
2996 symcount += dyn_count;
2997 if (symcount == 0)
2998 return 0;
2999
3000 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3001 if (syms == NULL)
3002 return -1;
3003
3004 if (!relocatable && static_count != 0 && dyn_count != 0)
3005 {
3006 /* Use both symbol tables. */
3007 memcpy (syms, static_syms, static_count * sizeof (*syms));
3008 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3009 }
3010 else if (!relocatable && static_count == 0)
3011 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3012 else
3013 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3014
3015 synthetic_relocatable = relocatable;
3016 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3017
3018 if (!relocatable && symcount > 1)
3019 {
3020 long j;
3021 /* Trim duplicate syms, since we may have merged the normal and
3022 dynamic symbols. Actually, we only care about syms that have
3023 different values, so trim any with the same value. */
3024 for (i = 1, j = 1; i < symcount; ++i)
3025 if (syms[i - 1]->value + syms[i - 1]->section->vma
3026 != syms[i]->value + syms[i]->section->vma)
3027 syms[j++] = syms[i];
3028 symcount = j;
3029 }
3030
3031 i = 0;
3032 if (strcmp (syms[i]->section->name, ".opd") == 0)
3033 ++i;
3034 codesecsym = i;
3035
3036 for (; i < symcount; ++i)
3037 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3038 != (SEC_CODE | SEC_ALLOC))
3039 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3040 break;
3041 codesecsymend = i;
3042
3043 for (; i < symcount; ++i)
3044 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3045 break;
3046 secsymend = i;
3047
3048 for (; i < symcount; ++i)
3049 if (strcmp (syms[i]->section->name, ".opd") != 0)
3050 break;
3051 opdsymend = i;
3052
3053 for (; i < symcount; ++i)
3054 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3055 != (SEC_CODE | SEC_ALLOC))
3056 break;
3057 symcount = i;
3058
3059 count = 0;
3060
3061 if (relocatable)
3062 {
3063 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3064 arelent *r;
3065 size_t size;
3066 long relcount;
3067
3068 if (opdsymend == secsymend)
3069 goto done;
3070
3071 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3072 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3073 if (relcount == 0)
3074 goto done;
3075
3076 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3077 {
3078 count = -1;
3079 goto done;
3080 }
3081
3082 size = 0;
3083 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3084 {
3085 asymbol *sym;
3086
3087 while (r < opd->relocation + relcount
3088 && r->address < syms[i]->value + opd->vma)
3089 ++r;
3090
3091 if (r == opd->relocation + relcount)
3092 break;
3093
3094 if (r->address != syms[i]->value + opd->vma)
3095 continue;
3096
3097 if (r->howto->type != R_PPC64_ADDR64)
3098 continue;
3099
3100 sym = *r->sym_ptr_ptr;
3101 if (!sym_exists_at (syms, opdsymend, symcount,
3102 sym->section->id, sym->value + r->addend))
3103 {
3104 ++count;
3105 size += sizeof (asymbol);
3106 size += strlen (syms[i]->name) + 2;
3107 }
3108 }
3109
3110 s = *ret = bfd_malloc (size);
3111 if (s == NULL)
3112 {
3113 count = -1;
3114 goto done;
3115 }
3116
3117 names = (char *) (s + count);
3118
3119 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3120 {
3121 asymbol *sym;
3122
3123 while (r < opd->relocation + relcount
3124 && r->address < syms[i]->value + opd->vma)
3125 ++r;
3126
3127 if (r == opd->relocation + relcount)
3128 break;
3129
3130 if (r->address != syms[i]->value + opd->vma)
3131 continue;
3132
3133 if (r->howto->type != R_PPC64_ADDR64)
3134 continue;
3135
3136 sym = *r->sym_ptr_ptr;
3137 if (!sym_exists_at (syms, opdsymend, symcount,
3138 sym->section->id, sym->value + r->addend))
3139 {
3140 size_t len;
3141
3142 *s = *syms[i];
3143 s->flags |= BSF_SYNTHETIC;
3144 s->section = sym->section;
3145 s->value = sym->value + r->addend;
3146 s->name = names;
3147 *names++ = '.';
3148 len = strlen (syms[i]->name);
3149 memcpy (names, syms[i]->name, len + 1);
3150 names += len + 1;
3151 /* Have udata.p point back to the original symbol this
3152 synthetic symbol was derived from. */
3153 s->udata.p = syms[i];
3154 s++;
3155 }
3156 }
3157 }
3158 else
3159 {
3160 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3161 bfd_byte *contents;
3162 size_t size;
3163 long plt_count = 0;
3164 bfd_vma glink_vma = 0, resolv_vma = 0;
3165 asection *dynamic, *glink = NULL, *relplt = NULL;
3166 arelent *p;
3167
3168 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3169 {
3170 if (contents)
3171 {
3172 free_contents_and_exit:
3173 free (contents);
3174 }
3175 count = -1;
3176 goto done;
3177 }
3178
3179 size = 0;
3180 for (i = secsymend; i < opdsymend; ++i)
3181 {
3182 bfd_vma ent;
3183
3184 /* Ignore bogus symbols. */
3185 if (syms[i]->value > opd->size - 8)
3186 continue;
3187
3188 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3189 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3190 {
3191 ++count;
3192 size += sizeof (asymbol);
3193 size += strlen (syms[i]->name) + 2;
3194 }
3195 }
3196
3197 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3198 if (dyn_count != 0
3199 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3200 {
3201 bfd_byte *dynbuf, *extdyn, *extdynend;
3202 size_t extdynsize;
3203 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3204
3205 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3206 goto free_contents_and_exit;
3207
3208 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3209 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3210
3211 extdyn = dynbuf;
3212 extdynend = extdyn + dynamic->size;
3213 for (; extdyn < extdynend; extdyn += extdynsize)
3214 {
3215 Elf_Internal_Dyn dyn;
3216 (*swap_dyn_in) (abfd, extdyn, &dyn);
3217
3218 if (dyn.d_tag == DT_NULL)
3219 break;
3220
3221 if (dyn.d_tag == DT_PPC64_GLINK)
3222 {
3223 /* The first glink stub starts at offset 32; see comment in
3224 ppc64_elf_finish_dynamic_sections. */
3225 glink_vma = dyn.d_un.d_val + 32;
3226 /* The .glink section usually does not survive the final
3227 link; search for the section (usually .text) where the
3228 glink stubs now reside. */
3229 glink = bfd_sections_find_if (abfd, section_covers_vma,
3230 &glink_vma);
3231 break;
3232 }
3233 }
3234
3235 free (dynbuf);
3236 }
3237
3238 if (glink != NULL)
3239 {
3240 /* Determine __glink trampoline by reading the relative branch
3241 from the first glink stub. */
3242 bfd_byte buf[4];
3243 if (bfd_get_section_contents (abfd, glink, buf,
3244 glink_vma + 4 - glink->vma, 4))
3245 {
3246 unsigned int insn = bfd_get_32 (abfd, buf);
3247 insn ^= B_DOT;
3248 if ((insn & ~0x3fffffc) == 0)
3249 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3250 }
3251
3252 if (resolv_vma)
3253 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3254
3255 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3256 if (relplt != NULL)
3257 {
3258 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3259 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3260 goto free_contents_and_exit;
3261
3262 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3263 size += plt_count * sizeof (asymbol);
3264
3265 p = relplt->relocation;
3266 for (i = 0; i < plt_count; i++, p++)
3267 {
3268 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3269 if (p->addend != 0)
3270 size += sizeof ("+0x") - 1 + 16;
3271 }
3272 }
3273 }
3274
3275 s = *ret = bfd_malloc (size);
3276 if (s == NULL)
3277 goto free_contents_and_exit;
3278
3279 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3280
3281 for (i = secsymend; i < opdsymend; ++i)
3282 {
3283 bfd_vma ent;
3284
3285 if (syms[i]->value > opd->size - 8)
3286 continue;
3287
3288 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3289 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3290 {
3291 long lo, hi;
3292 size_t len;
3293 asection *sec = abfd->sections;
3294
3295 *s = *syms[i];
3296 lo = codesecsym;
3297 hi = codesecsymend;
3298 while (lo < hi)
3299 {
3300 long mid = (lo + hi) >> 1;
3301 if (syms[mid]->section->vma < ent)
3302 lo = mid + 1;
3303 else if (syms[mid]->section->vma > ent)
3304 hi = mid;
3305 else
3306 {
3307 sec = syms[mid]->section;
3308 break;
3309 }
3310 }
3311
3312 if (lo >= hi && lo > codesecsym)
3313 sec = syms[lo - 1]->section;
3314
3315 for (; sec != NULL; sec = sec->next)
3316 {
3317 if (sec->vma > ent)
3318 break;
3319 /* SEC_LOAD may not be set if SEC is from a separate debug
3320 info file. */
3321 if ((sec->flags & SEC_ALLOC) == 0)
3322 break;
3323 if ((sec->flags & SEC_CODE) != 0)
3324 s->section = sec;
3325 }
3326 s->flags |= BSF_SYNTHETIC;
3327 s->value = ent - s->section->vma;
3328 s->name = names;
3329 *names++ = '.';
3330 len = strlen (syms[i]->name);
3331 memcpy (names, syms[i]->name, len + 1);
3332 names += len + 1;
3333 /* Have udata.p point back to the original symbol this
3334 synthetic symbol was derived from. */
3335 s->udata.p = syms[i];
3336 s++;
3337 }
3338 }
3339 free (contents);
3340
3341 if (glink != NULL && relplt != NULL)
3342 {
3343 if (resolv_vma)
3344 {
3345 /* Add a symbol for the main glink trampoline. */
3346 memset (s, 0, sizeof *s);
3347 s->the_bfd = abfd;
3348 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3349 s->section = glink;
3350 s->value = resolv_vma - glink->vma;
3351 s->name = names;
3352 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3353 names += sizeof ("__glink_PLTresolve");
3354 s++;
3355 count++;
3356 }
3357
3358 /* FIXME: It would be very much nicer to put sym@plt on the
3359 stub rather than on the glink branch table entry. The
3360 objdump disassembler would then use a sensible symbol
3361 name on plt calls. The difficulty in doing so is
3362 a) finding the stubs, and,
3363 b) matching stubs against plt entries, and,
3364 c) there can be multiple stubs for a given plt entry.
3365
3366 Solving (a) could be done by code scanning, but older
3367 ppc64 binaries used different stubs to current code.
3368 (b) is the tricky one since you need to known the toc
3369 pointer for at least one function that uses a pic stub to
3370 be able to calculate the plt address referenced.
3371 (c) means gdb would need to set multiple breakpoints (or
3372 find the glink branch itself) when setting breakpoints
3373 for pending shared library loads. */
3374 p = relplt->relocation;
3375 for (i = 0; i < plt_count; i++, p++)
3376 {
3377 size_t len;
3378
3379 *s = **p->sym_ptr_ptr;
3380 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3381 we are defining a symbol, ensure one of them is set. */
3382 if ((s->flags & BSF_LOCAL) == 0)
3383 s->flags |= BSF_GLOBAL;
3384 s->flags |= BSF_SYNTHETIC;
3385 s->section = glink;
3386 s->value = glink_vma - glink->vma;
3387 s->name = names;
3388 s->udata.p = NULL;
3389 len = strlen ((*p->sym_ptr_ptr)->name);
3390 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3391 names += len;
3392 if (p->addend != 0)
3393 {
3394 memcpy (names, "+0x", sizeof ("+0x") - 1);
3395 names += sizeof ("+0x") - 1;
3396 bfd_sprintf_vma (abfd, names, p->addend);
3397 names += strlen (names);
3398 }
3399 memcpy (names, "@plt", sizeof ("@plt"));
3400 names += sizeof ("@plt");
3401 s++;
3402 glink_vma += 8;
3403 if (i >= 0x8000)
3404 glink_vma += 4;
3405 }
3406 count += plt_count;
3407 }
3408 }
3409
3410 done:
3411 free (syms);
3412 return count;
3413 }
3414 \f
3415 /* The following functions are specific to the ELF linker, while
3416 functions above are used generally. Those named ppc64_elf_* are
3417 called by the main ELF linker code. They appear in this file more
3418 or less in the order in which they are called. eg.
3419 ppc64_elf_check_relocs is called early in the link process,
3420 ppc64_elf_finish_dynamic_sections is one of the last functions
3421 called.
3422
3423 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3424 functions have both a function code symbol and a function descriptor
3425 symbol. A call to foo in a relocatable object file looks like:
3426
3427 . .text
3428 . x:
3429 . bl .foo
3430 . nop
3431
3432 The function definition in another object file might be:
3433
3434 . .section .opd
3435 . foo: .quad .foo
3436 . .quad .TOC.@tocbase
3437 . .quad 0
3438 .
3439 . .text
3440 . .foo: blr
3441
3442 When the linker resolves the call during a static link, the branch
3443 unsurprisingly just goes to .foo and the .opd information is unused.
3444 If the function definition is in a shared library, things are a little
3445 different: The call goes via a plt call stub, the opd information gets
3446 copied to the plt, and the linker patches the nop.
3447
3448 . x:
3449 . bl .foo_stub
3450 . ld 2,40(1)
3451 .
3452 .
3453 . .foo_stub:
3454 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3455 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3456 . std 2,40(1) # this is the general idea
3457 . ld 11,0(12)
3458 . ld 2,8(12)
3459 . mtctr 11
3460 . ld 11,16(12)
3461 . bctr
3462 .
3463 . .section .plt
3464 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3465
3466 The "reloc ()" notation is supposed to indicate that the linker emits
3467 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3468 copying.
3469
3470 What are the difficulties here? Well, firstly, the relocations
3471 examined by the linker in check_relocs are against the function code
3472 sym .foo, while the dynamic relocation in the plt is emitted against
3473 the function descriptor symbol, foo. Somewhere along the line, we need
3474 to carefully copy dynamic link information from one symbol to the other.
3475 Secondly, the generic part of the elf linker will make .foo a dynamic
3476 symbol as is normal for most other backends. We need foo dynamic
3477 instead, at least for an application final link. However, when
3478 creating a shared library containing foo, we need to have both symbols
3479 dynamic so that references to .foo are satisfied during the early
3480 stages of linking. Otherwise the linker might decide to pull in a
3481 definition from some other object, eg. a static library.
3482
3483 Update: As of August 2004, we support a new convention. Function
3484 calls may use the function descriptor symbol, ie. "bl foo". This
3485 behaves exactly as "bl .foo". */
3486
3487 /* Of those relocs that might be copied as dynamic relocs, this function
3488 selects those that must be copied when linking a shared library,
3489 even when the symbol is local. */
3490
3491 static int
3492 must_be_dyn_reloc (struct bfd_link_info *info,
3493 enum elf_ppc64_reloc_type r_type)
3494 {
3495 switch (r_type)
3496 {
3497 default:
3498 return 1;
3499
3500 case R_PPC64_REL32:
3501 case R_PPC64_REL64:
3502 case R_PPC64_REL30:
3503 return 0;
3504
3505 case R_PPC64_TPREL16:
3506 case R_PPC64_TPREL16_LO:
3507 case R_PPC64_TPREL16_HI:
3508 case R_PPC64_TPREL16_HA:
3509 case R_PPC64_TPREL16_DS:
3510 case R_PPC64_TPREL16_LO_DS:
3511 case R_PPC64_TPREL16_HIGHER:
3512 case R_PPC64_TPREL16_HIGHERA:
3513 case R_PPC64_TPREL16_HIGHEST:
3514 case R_PPC64_TPREL16_HIGHESTA:
3515 case R_PPC64_TPREL64:
3516 return !info->executable;
3517 }
3518 }
3519
3520 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3521 copying dynamic variables from a shared lib into an app's dynbss
3522 section, and instead use a dynamic relocation to point into the
3523 shared lib. With code that gcc generates, it's vital that this be
3524 enabled; In the PowerPC64 ABI, the address of a function is actually
3525 the address of a function descriptor, which resides in the .opd
3526 section. gcc uses the descriptor directly rather than going via the
3527 GOT as some other ABI's do, which means that initialized function
3528 pointers must reference the descriptor. Thus, a function pointer
3529 initialized to the address of a function in a shared library will
3530 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3531 redefines the function descriptor symbol to point to the copy. This
3532 presents a problem as a plt entry for that function is also
3533 initialized from the function descriptor symbol and the copy reloc
3534 may not be initialized first. */
3535 #define ELIMINATE_COPY_RELOCS 1
3536
3537 /* Section name for stubs is the associated section name plus this
3538 string. */
3539 #define STUB_SUFFIX ".stub"
3540
3541 /* Linker stubs.
3542 ppc_stub_long_branch:
3543 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3544 destination, but a 24 bit branch in a stub section will reach.
3545 . b dest
3546
3547 ppc_stub_plt_branch:
3548 Similar to the above, but a 24 bit branch in the stub section won't
3549 reach its destination.
3550 . addis %r12,%r2,xxx@toc@ha
3551 . ld %r11,xxx@toc@l(%r12)
3552 . mtctr %r11
3553 . bctr
3554
3555 ppc_stub_plt_call:
3556 Used to call a function in a shared library. If it so happens that
3557 the plt entry referenced crosses a 64k boundary, then an extra
3558 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3559 . addis %r12,%r2,xxx@toc@ha
3560 . std %r2,40(%r1)
3561 . ld %r11,xxx+0@toc@l(%r12)
3562 . mtctr %r11
3563 . ld %r2,xxx+8@toc@l(%r12)
3564 . ld %r11,xxx+16@toc@l(%r12)
3565 . bctr
3566
3567 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3568 code to adjust the value and save r2 to support multiple toc sections.
3569 A ppc_stub_long_branch with an r2 offset looks like:
3570 . std %r2,40(%r1)
3571 . addis %r2,%r2,off@ha
3572 . addi %r2,%r2,off@l
3573 . b dest
3574
3575 A ppc_stub_plt_branch with an r2 offset looks like:
3576 . std %r2,40(%r1)
3577 . addis %r12,%r2,xxx@toc@ha
3578 . ld %r11,xxx@toc@l(%r12)
3579 . addis %r2,%r2,off@ha
3580 . addi %r2,%r2,off@l
3581 . mtctr %r11
3582 . bctr
3583
3584 In cases where the "addis" instruction would add zero, the "addis" is
3585 omitted and following instructions modified slightly in some cases.
3586 */
3587
3588 enum ppc_stub_type {
3589 ppc_stub_none,
3590 ppc_stub_long_branch,
3591 ppc_stub_long_branch_r2off,
3592 ppc_stub_plt_branch,
3593 ppc_stub_plt_branch_r2off,
3594 ppc_stub_plt_call,
3595 ppc_stub_plt_call_r2save
3596 };
3597
3598 struct ppc_stub_hash_entry {
3599
3600 /* Base hash table entry structure. */
3601 struct bfd_hash_entry root;
3602
3603 enum ppc_stub_type stub_type;
3604
3605 /* The stub section. */
3606 asection *stub_sec;
3607
3608 /* Offset within stub_sec of the beginning of this stub. */
3609 bfd_vma stub_offset;
3610
3611 /* Given the symbol's value and its section we can determine its final
3612 value when building the stubs (so the stub knows where to jump. */
3613 bfd_vma target_value;
3614 asection *target_section;
3615
3616 /* The symbol table entry, if any, that this was derived from. */
3617 struct ppc_link_hash_entry *h;
3618 struct plt_entry *plt_ent;
3619
3620 /* And the reloc addend that this was derived from. */
3621 bfd_vma addend;
3622
3623 /* Where this stub is being called from, or, in the case of combined
3624 stub sections, the first input section in the group. */
3625 asection *id_sec;
3626 };
3627
3628 struct ppc_branch_hash_entry {
3629
3630 /* Base hash table entry structure. */
3631 struct bfd_hash_entry root;
3632
3633 /* Offset within branch lookup table. */
3634 unsigned int offset;
3635
3636 /* Generation marker. */
3637 unsigned int iter;
3638 };
3639
3640 struct ppc_link_hash_entry
3641 {
3642 struct elf_link_hash_entry elf;
3643
3644 union {
3645 /* A pointer to the most recently used stub hash entry against this
3646 symbol. */
3647 struct ppc_stub_hash_entry *stub_cache;
3648
3649 /* A pointer to the next symbol starting with a '.' */
3650 struct ppc_link_hash_entry *next_dot_sym;
3651 } u;
3652
3653 /* Track dynamic relocs copied for this symbol. */
3654 struct elf_dyn_relocs *dyn_relocs;
3655
3656 /* Link between function code and descriptor symbols. */
3657 struct ppc_link_hash_entry *oh;
3658
3659 /* Flag function code and descriptor symbols. */
3660 unsigned int is_func:1;
3661 unsigned int is_func_descriptor:1;
3662 unsigned int fake:1;
3663
3664 /* Whether global opd/toc sym has been adjusted or not.
3665 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3666 should be set for all globals defined in any opd/toc section. */
3667 unsigned int adjust_done:1;
3668
3669 /* Set if we twiddled this symbol to weak at some stage. */
3670 unsigned int was_undefined:1;
3671
3672 /* Contexts in which symbol is used in the GOT (or TOC).
3673 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3674 corresponding relocs are encountered during check_relocs.
3675 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3676 indicate the corresponding GOT entry type is not needed.
3677 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3678 a TPREL one. We use a separate flag rather than setting TPREL
3679 just for convenience in distinguishing the two cases. */
3680 #define TLS_GD 1 /* GD reloc. */
3681 #define TLS_LD 2 /* LD reloc. */
3682 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3683 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3684 #define TLS_TLS 16 /* Any TLS reloc. */
3685 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3686 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3687 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3688 unsigned char tls_mask;
3689 };
3690
3691 /* ppc64 ELF linker hash table. */
3692
3693 struct ppc_link_hash_table
3694 {
3695 struct elf_link_hash_table elf;
3696
3697 /* The stub hash table. */
3698 struct bfd_hash_table stub_hash_table;
3699
3700 /* Another hash table for plt_branch stubs. */
3701 struct bfd_hash_table branch_hash_table;
3702
3703 /* Hash table for function prologue tocsave. */
3704 htab_t tocsave_htab;
3705
3706 /* Linker stub bfd. */
3707 bfd *stub_bfd;
3708
3709 /* Linker call-backs. */
3710 asection * (*add_stub_section) (const char *, asection *);
3711 void (*layout_sections_again) (void);
3712
3713 /* Array to keep track of which stub sections have been created, and
3714 information on stub grouping. */
3715 struct map_stub {
3716 /* This is the section to which stubs in the group will be attached. */
3717 asection *link_sec;
3718 /* The stub section. */
3719 asection *stub_sec;
3720 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3721 bfd_vma toc_off;
3722 } *stub_group;
3723
3724 /* Temp used when calculating TOC pointers. */
3725 bfd_vma toc_curr;
3726 bfd *toc_bfd;
3727 asection *toc_first_sec;
3728
3729 /* Highest input section id. */
3730 int top_id;
3731
3732 /* Highest output section index. */
3733 int top_index;
3734
3735 /* Used when adding symbols. */
3736 struct ppc_link_hash_entry *dot_syms;
3737
3738 /* List of input sections for each output section. */
3739 asection **input_list;
3740
3741 /* Short-cuts to get to dynamic linker sections. */
3742 asection *got;
3743 asection *plt;
3744 asection *relplt;
3745 asection *iplt;
3746 asection *reliplt;
3747 asection *dynbss;
3748 asection *relbss;
3749 asection *glink;
3750 asection *sfpr;
3751 asection *brlt;
3752 asection *relbrlt;
3753 asection *glink_eh_frame;
3754
3755 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3756 struct ppc_link_hash_entry *tls_get_addr;
3757 struct ppc_link_hash_entry *tls_get_addr_fd;
3758
3759 /* The size of reliplt used by got entry relocs. */
3760 bfd_size_type got_reli_size;
3761
3762 /* Statistics. */
3763 unsigned long stub_count[ppc_stub_plt_call_r2save];
3764
3765 /* Number of stubs against global syms. */
3766 unsigned long stub_globals;
3767
3768 /* Alignment of PLT call stubs. */
3769 unsigned int plt_stub_align:4;
3770
3771 /* Set if PLT call stubs should load r11. */
3772 unsigned int plt_static_chain:1;
3773
3774 /* Set if PLT call stubs need a read-read barrier. */
3775 unsigned int plt_thread_safe:1;
3776
3777 /* Set if we should emit symbols for stubs. */
3778 unsigned int emit_stub_syms:1;
3779
3780 /* Set if __tls_get_addr optimization should not be done. */
3781 unsigned int no_tls_get_addr_opt:1;
3782
3783 /* Support for multiple toc sections. */
3784 unsigned int do_multi_toc:1;
3785 unsigned int multi_toc_needed:1;
3786 unsigned int second_toc_pass:1;
3787 unsigned int do_toc_opt:1;
3788
3789 /* Set on error. */
3790 unsigned int stub_error:1;
3791
3792 /* Temp used by ppc64_elf_process_dot_syms. */
3793 unsigned int twiddled_syms:1;
3794
3795 /* Incremented every time we size stubs. */
3796 unsigned int stub_iteration;
3797
3798 /* Small local sym cache. */
3799 struct sym_cache sym_cache;
3800 };
3801
3802 /* Rename some of the generic section flags to better document how they
3803 are used here. */
3804
3805 /* Nonzero if this section has TLS related relocations. */
3806 #define has_tls_reloc sec_flg0
3807
3808 /* Nonzero if this section has a call to __tls_get_addr. */
3809 #define has_tls_get_addr_call sec_flg1
3810
3811 /* Nonzero if this section has any toc or got relocs. */
3812 #define has_toc_reloc sec_flg2
3813
3814 /* Nonzero if this section has a call to another section that uses
3815 the toc or got. */
3816 #define makes_toc_func_call sec_flg3
3817
3818 /* Recursion protection when determining above flag. */
3819 #define call_check_in_progress sec_flg4
3820 #define call_check_done sec_flg5
3821
3822 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3823
3824 #define ppc_hash_table(p) \
3825 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3826 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3827
3828 #define ppc_stub_hash_lookup(table, string, create, copy) \
3829 ((struct ppc_stub_hash_entry *) \
3830 bfd_hash_lookup ((table), (string), (create), (copy)))
3831
3832 #define ppc_branch_hash_lookup(table, string, create, copy) \
3833 ((struct ppc_branch_hash_entry *) \
3834 bfd_hash_lookup ((table), (string), (create), (copy)))
3835
3836 /* Create an entry in the stub hash table. */
3837
3838 static struct bfd_hash_entry *
3839 stub_hash_newfunc (struct bfd_hash_entry *entry,
3840 struct bfd_hash_table *table,
3841 const char *string)
3842 {
3843 /* Allocate the structure if it has not already been allocated by a
3844 subclass. */
3845 if (entry == NULL)
3846 {
3847 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3848 if (entry == NULL)
3849 return entry;
3850 }
3851
3852 /* Call the allocation method of the superclass. */
3853 entry = bfd_hash_newfunc (entry, table, string);
3854 if (entry != NULL)
3855 {
3856 struct ppc_stub_hash_entry *eh;
3857
3858 /* Initialize the local fields. */
3859 eh = (struct ppc_stub_hash_entry *) entry;
3860 eh->stub_type = ppc_stub_none;
3861 eh->stub_sec = NULL;
3862 eh->stub_offset = 0;
3863 eh->target_value = 0;
3864 eh->target_section = NULL;
3865 eh->h = NULL;
3866 eh->id_sec = NULL;
3867 }
3868
3869 return entry;
3870 }
3871
3872 /* Create an entry in the branch hash table. */
3873
3874 static struct bfd_hash_entry *
3875 branch_hash_newfunc (struct bfd_hash_entry *entry,
3876 struct bfd_hash_table *table,
3877 const char *string)
3878 {
3879 /* Allocate the structure if it has not already been allocated by a
3880 subclass. */
3881 if (entry == NULL)
3882 {
3883 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3884 if (entry == NULL)
3885 return entry;
3886 }
3887
3888 /* Call the allocation method of the superclass. */
3889 entry = bfd_hash_newfunc (entry, table, string);
3890 if (entry != NULL)
3891 {
3892 struct ppc_branch_hash_entry *eh;
3893
3894 /* Initialize the local fields. */
3895 eh = (struct ppc_branch_hash_entry *) entry;
3896 eh->offset = 0;
3897 eh->iter = 0;
3898 }
3899
3900 return entry;
3901 }
3902
3903 /* Create an entry in a ppc64 ELF linker hash table. */
3904
3905 static struct bfd_hash_entry *
3906 link_hash_newfunc (struct bfd_hash_entry *entry,
3907 struct bfd_hash_table *table,
3908 const char *string)
3909 {
3910 /* Allocate the structure if it has not already been allocated by a
3911 subclass. */
3912 if (entry == NULL)
3913 {
3914 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3915 if (entry == NULL)
3916 return entry;
3917 }
3918
3919 /* Call the allocation method of the superclass. */
3920 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3921 if (entry != NULL)
3922 {
3923 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3924
3925 memset (&eh->u.stub_cache, 0,
3926 (sizeof (struct ppc_link_hash_entry)
3927 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3928
3929 /* When making function calls, old ABI code references function entry
3930 points (dot symbols), while new ABI code references the function
3931 descriptor symbol. We need to make any combination of reference and
3932 definition work together, without breaking archive linking.
3933
3934 For a defined function "foo" and an undefined call to "bar":
3935 An old object defines "foo" and ".foo", references ".bar" (possibly
3936 "bar" too).
3937 A new object defines "foo" and references "bar".
3938
3939 A new object thus has no problem with its undefined symbols being
3940 satisfied by definitions in an old object. On the other hand, the
3941 old object won't have ".bar" satisfied by a new object.
3942
3943 Keep a list of newly added dot-symbols. */
3944
3945 if (string[0] == '.')
3946 {
3947 struct ppc_link_hash_table *htab;
3948
3949 htab = (struct ppc_link_hash_table *) table;
3950 eh->u.next_dot_sym = htab->dot_syms;
3951 htab->dot_syms = eh;
3952 }
3953 }
3954
3955 return entry;
3956 }
3957
3958 struct tocsave_entry {
3959 asection *sec;
3960 bfd_vma offset;
3961 };
3962
3963 static hashval_t
3964 tocsave_htab_hash (const void *p)
3965 {
3966 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3967 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
3968 }
3969
3970 static int
3971 tocsave_htab_eq (const void *p1, const void *p2)
3972 {
3973 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3974 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3975 return e1->sec == e2->sec && e1->offset == e2->offset;
3976 }
3977
3978 /* Create a ppc64 ELF linker hash table. */
3979
3980 static struct bfd_link_hash_table *
3981 ppc64_elf_link_hash_table_create (bfd *abfd)
3982 {
3983 struct ppc_link_hash_table *htab;
3984 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3985
3986 htab = bfd_zmalloc (amt);
3987 if (htab == NULL)
3988 return NULL;
3989
3990 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3991 sizeof (struct ppc_link_hash_entry),
3992 PPC64_ELF_DATA))
3993 {
3994 free (htab);
3995 return NULL;
3996 }
3997
3998 /* Init the stub hash table too. */
3999 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4000 sizeof (struct ppc_stub_hash_entry)))
4001 return NULL;
4002
4003 /* And the branch hash table. */
4004 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4005 sizeof (struct ppc_branch_hash_entry)))
4006 return NULL;
4007
4008 htab->tocsave_htab = htab_try_create (1024,
4009 tocsave_htab_hash,
4010 tocsave_htab_eq,
4011 NULL);
4012 if (htab->tocsave_htab == NULL)
4013 return NULL;
4014
4015 /* Initializing two fields of the union is just cosmetic. We really
4016 only care about glist, but when compiled on a 32-bit host the
4017 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4018 debugger inspection of these fields look nicer. */
4019 htab->elf.init_got_refcount.refcount = 0;
4020 htab->elf.init_got_refcount.glist = NULL;
4021 htab->elf.init_plt_refcount.refcount = 0;
4022 htab->elf.init_plt_refcount.glist = NULL;
4023 htab->elf.init_got_offset.offset = 0;
4024 htab->elf.init_got_offset.glist = NULL;
4025 htab->elf.init_plt_offset.offset = 0;
4026 htab->elf.init_plt_offset.glist = NULL;
4027
4028 return &htab->elf.root;
4029 }
4030
4031 /* Free the derived linker hash table. */
4032
4033 static void
4034 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4035 {
4036 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4037
4038 bfd_hash_table_free (&htab->stub_hash_table);
4039 bfd_hash_table_free (&htab->branch_hash_table);
4040 if (htab->tocsave_htab)
4041 htab_delete (htab->tocsave_htab);
4042 _bfd_generic_link_hash_table_free (hash);
4043 }
4044
4045 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4046
4047 void
4048 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4049 {
4050 struct ppc_link_hash_table *htab;
4051
4052 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4053
4054 /* Always hook our dynamic sections into the first bfd, which is the
4055 linker created stub bfd. This ensures that the GOT header is at
4056 the start of the output TOC section. */
4057 htab = ppc_hash_table (info);
4058 if (htab == NULL)
4059 return;
4060 htab->stub_bfd = abfd;
4061 htab->elf.dynobj = abfd;
4062 }
4063
4064 /* Build a name for an entry in the stub hash table. */
4065
4066 static char *
4067 ppc_stub_name (const asection *input_section,
4068 const asection *sym_sec,
4069 const struct ppc_link_hash_entry *h,
4070 const Elf_Internal_Rela *rel)
4071 {
4072 char *stub_name;
4073 bfd_size_type len;
4074
4075 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4076 offsets from a sym as a branch target? In fact, we could
4077 probably assume the addend is always zero. */
4078 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4079
4080 if (h)
4081 {
4082 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4083 stub_name = bfd_malloc (len);
4084 if (stub_name == NULL)
4085 return stub_name;
4086
4087 sprintf (stub_name, "%08x.%s+%x",
4088 input_section->id & 0xffffffff,
4089 h->elf.root.root.string,
4090 (int) rel->r_addend & 0xffffffff);
4091 }
4092 else
4093 {
4094 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4095 stub_name = bfd_malloc (len);
4096 if (stub_name == NULL)
4097 return stub_name;
4098
4099 sprintf (stub_name, "%08x.%x:%x+%x",
4100 input_section->id & 0xffffffff,
4101 sym_sec->id & 0xffffffff,
4102 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4103 (int) rel->r_addend & 0xffffffff);
4104 }
4105 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4106 stub_name[len - 2] = 0;
4107 return stub_name;
4108 }
4109
4110 /* Look up an entry in the stub hash. Stub entries are cached because
4111 creating the stub name takes a bit of time. */
4112
4113 static struct ppc_stub_hash_entry *
4114 ppc_get_stub_entry (const asection *input_section,
4115 const asection *sym_sec,
4116 struct ppc_link_hash_entry *h,
4117 const Elf_Internal_Rela *rel,
4118 struct ppc_link_hash_table *htab)
4119 {
4120 struct ppc_stub_hash_entry *stub_entry;
4121 const asection *id_sec;
4122
4123 /* If this input section is part of a group of sections sharing one
4124 stub section, then use the id of the first section in the group.
4125 Stub names need to include a section id, as there may well be
4126 more than one stub used to reach say, printf, and we need to
4127 distinguish between them. */
4128 id_sec = htab->stub_group[input_section->id].link_sec;
4129
4130 if (h != NULL && h->u.stub_cache != NULL
4131 && h->u.stub_cache->h == h
4132 && h->u.stub_cache->id_sec == id_sec)
4133 {
4134 stub_entry = h->u.stub_cache;
4135 }
4136 else
4137 {
4138 char *stub_name;
4139
4140 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4141 if (stub_name == NULL)
4142 return NULL;
4143
4144 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4145 stub_name, FALSE, FALSE);
4146 if (h != NULL)
4147 h->u.stub_cache = stub_entry;
4148
4149 free (stub_name);
4150 }
4151
4152 return stub_entry;
4153 }
4154
4155 /* Add a new stub entry to the stub hash. Not all fields of the new
4156 stub entry are initialised. */
4157
4158 static struct ppc_stub_hash_entry *
4159 ppc_add_stub (const char *stub_name,
4160 asection *section,
4161 struct bfd_link_info *info)
4162 {
4163 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4164 asection *link_sec;
4165 asection *stub_sec;
4166 struct ppc_stub_hash_entry *stub_entry;
4167
4168 link_sec = htab->stub_group[section->id].link_sec;
4169 stub_sec = htab->stub_group[section->id].stub_sec;
4170 if (stub_sec == NULL)
4171 {
4172 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4173 if (stub_sec == NULL)
4174 {
4175 size_t namelen;
4176 bfd_size_type len;
4177 char *s_name;
4178
4179 namelen = strlen (link_sec->name);
4180 len = namelen + sizeof (STUB_SUFFIX);
4181 s_name = bfd_alloc (htab->stub_bfd, len);
4182 if (s_name == NULL)
4183 return NULL;
4184
4185 memcpy (s_name, link_sec->name, namelen);
4186 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4187 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4188 if (stub_sec == NULL)
4189 return NULL;
4190 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4191 }
4192 htab->stub_group[section->id].stub_sec = stub_sec;
4193 }
4194
4195 /* Enter this entry into the linker stub hash table. */
4196 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4197 TRUE, FALSE);
4198 if (stub_entry == NULL)
4199 {
4200 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4201 section->owner, stub_name);
4202 return NULL;
4203 }
4204
4205 stub_entry->stub_sec = stub_sec;
4206 stub_entry->stub_offset = 0;
4207 stub_entry->id_sec = link_sec;
4208 return stub_entry;
4209 }
4210
4211 /* Create sections for linker generated code. */
4212
4213 static bfd_boolean
4214 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4215 {
4216 struct ppc_link_hash_table *htab;
4217 flagword flags;
4218
4219 htab = ppc_hash_table (info);
4220 if (htab == NULL)
4221 return FALSE;
4222
4223 /* Create .sfpr for code to save and restore fp regs. */
4224 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4225 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4226 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4227 flags);
4228 if (htab->sfpr == NULL
4229 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4230 return FALSE;
4231
4232 /* Create .glink for lazy dynamic linking support. */
4233 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4234 flags);
4235 if (htab->glink == NULL
4236 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4237 return FALSE;
4238
4239 if (!info->no_ld_generated_unwind_info)
4240 {
4241 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4242 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4243 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4244 ".eh_frame",
4245 flags);
4246 if (htab->glink_eh_frame == NULL
4247 || !bfd_set_section_alignment (abfd, htab->glink_eh_frame, 2))
4248 return FALSE;
4249 }
4250
4251 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4252 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4253 if (htab->iplt == NULL
4254 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4255 return FALSE;
4256
4257 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4258 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4259 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4260 ".rela.iplt",
4261 flags);
4262 if (htab->reliplt == NULL
4263 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4264 return FALSE;
4265
4266 /* Create branch lookup table for plt_branch stubs. */
4267 flags = (SEC_ALLOC | SEC_LOAD
4268 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4269 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4270 flags);
4271 if (htab->brlt == NULL
4272 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4273 return FALSE;
4274
4275 if (!info->shared)
4276 return TRUE;
4277
4278 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4279 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4280 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4281 ".rela.branch_lt",
4282 flags);
4283 if (htab->relbrlt == NULL
4284 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4285 return FALSE;
4286
4287 return TRUE;
4288 }
4289
4290 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4291 not already done. */
4292
4293 static bfd_boolean
4294 create_got_section (bfd *abfd, struct bfd_link_info *info)
4295 {
4296 asection *got, *relgot;
4297 flagword flags;
4298 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4299
4300 if (!is_ppc64_elf (abfd))
4301 return FALSE;
4302 if (htab == NULL)
4303 return FALSE;
4304
4305 if (!htab->got)
4306 {
4307 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4308 return FALSE;
4309
4310 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4311 if (!htab->got)
4312 abort ();
4313 }
4314
4315 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4316 | SEC_LINKER_CREATED);
4317
4318 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4319 if (!got
4320 || !bfd_set_section_alignment (abfd, got, 3))
4321 return FALSE;
4322
4323 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4324 flags | SEC_READONLY);
4325 if (!relgot
4326 || ! bfd_set_section_alignment (abfd, relgot, 3))
4327 return FALSE;
4328
4329 ppc64_elf_tdata (abfd)->got = got;
4330 ppc64_elf_tdata (abfd)->relgot = relgot;
4331 return TRUE;
4332 }
4333
4334 /* Create the dynamic sections, and set up shortcuts. */
4335
4336 static bfd_boolean
4337 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4338 {
4339 struct ppc_link_hash_table *htab;
4340
4341 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4342 return FALSE;
4343
4344 htab = ppc_hash_table (info);
4345 if (htab == NULL)
4346 return FALSE;
4347
4348 if (!htab->got)
4349 htab->got = bfd_get_section_by_name (dynobj, ".got");
4350 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4351 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4352 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4353 if (!info->shared)
4354 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4355
4356 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4357 || (!info->shared && !htab->relbss))
4358 abort ();
4359
4360 return TRUE;
4361 }
4362
4363 /* Follow indirect and warning symbol links. */
4364
4365 static inline struct bfd_link_hash_entry *
4366 follow_link (struct bfd_link_hash_entry *h)
4367 {
4368 while (h->type == bfd_link_hash_indirect
4369 || h->type == bfd_link_hash_warning)
4370 h = h->u.i.link;
4371 return h;
4372 }
4373
4374 static inline struct elf_link_hash_entry *
4375 elf_follow_link (struct elf_link_hash_entry *h)
4376 {
4377 return (struct elf_link_hash_entry *) follow_link (&h->root);
4378 }
4379
4380 static inline struct ppc_link_hash_entry *
4381 ppc_follow_link (struct ppc_link_hash_entry *h)
4382 {
4383 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4384 }
4385
4386 /* Merge PLT info on FROM with that on TO. */
4387
4388 static void
4389 move_plt_plist (struct ppc_link_hash_entry *from,
4390 struct ppc_link_hash_entry *to)
4391 {
4392 if (from->elf.plt.plist != NULL)
4393 {
4394 if (to->elf.plt.plist != NULL)
4395 {
4396 struct plt_entry **entp;
4397 struct plt_entry *ent;
4398
4399 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4400 {
4401 struct plt_entry *dent;
4402
4403 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4404 if (dent->addend == ent->addend)
4405 {
4406 dent->plt.refcount += ent->plt.refcount;
4407 *entp = ent->next;
4408 break;
4409 }
4410 if (dent == NULL)
4411 entp = &ent->next;
4412 }
4413 *entp = to->elf.plt.plist;
4414 }
4415
4416 to->elf.plt.plist = from->elf.plt.plist;
4417 from->elf.plt.plist = NULL;
4418 }
4419 }
4420
4421 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4422
4423 static void
4424 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4425 struct elf_link_hash_entry *dir,
4426 struct elf_link_hash_entry *ind)
4427 {
4428 struct ppc_link_hash_entry *edir, *eind;
4429
4430 edir = (struct ppc_link_hash_entry *) dir;
4431 eind = (struct ppc_link_hash_entry *) ind;
4432
4433 edir->is_func |= eind->is_func;
4434 edir->is_func_descriptor |= eind->is_func_descriptor;
4435 edir->tls_mask |= eind->tls_mask;
4436 if (eind->oh != NULL)
4437 edir->oh = ppc_follow_link (eind->oh);
4438
4439 /* If called to transfer flags for a weakdef during processing
4440 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4441 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4442 if (!(ELIMINATE_COPY_RELOCS
4443 && eind->elf.root.type != bfd_link_hash_indirect
4444 && edir->elf.dynamic_adjusted))
4445 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4446
4447 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4448 edir->elf.ref_regular |= eind->elf.ref_regular;
4449 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4450 edir->elf.needs_plt |= eind->elf.needs_plt;
4451
4452 /* Copy over any dynamic relocs we may have on the indirect sym. */
4453 if (eind->dyn_relocs != NULL)
4454 {
4455 if (edir->dyn_relocs != NULL)
4456 {
4457 struct elf_dyn_relocs **pp;
4458 struct elf_dyn_relocs *p;
4459
4460 /* Add reloc counts against the indirect sym to the direct sym
4461 list. Merge any entries against the same section. */
4462 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4463 {
4464 struct elf_dyn_relocs *q;
4465
4466 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4467 if (q->sec == p->sec)
4468 {
4469 q->pc_count += p->pc_count;
4470 q->count += p->count;
4471 *pp = p->next;
4472 break;
4473 }
4474 if (q == NULL)
4475 pp = &p->next;
4476 }
4477 *pp = edir->dyn_relocs;
4478 }
4479
4480 edir->dyn_relocs = eind->dyn_relocs;
4481 eind->dyn_relocs = NULL;
4482 }
4483
4484 /* If we were called to copy over info for a weak sym, that's all.
4485 You might think dyn_relocs need not be copied over; After all,
4486 both syms will be dynamic or both non-dynamic so we're just
4487 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4488 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4489 dyn_relocs in read-only sections, and it does so on what is the
4490 DIR sym here. */
4491 if (eind->elf.root.type != bfd_link_hash_indirect)
4492 return;
4493
4494 /* Copy over got entries that we may have already seen to the
4495 symbol which just became indirect. */
4496 if (eind->elf.got.glist != NULL)
4497 {
4498 if (edir->elf.got.glist != NULL)
4499 {
4500 struct got_entry **entp;
4501 struct got_entry *ent;
4502
4503 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4504 {
4505 struct got_entry *dent;
4506
4507 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4508 if (dent->addend == ent->addend
4509 && dent->owner == ent->owner
4510 && dent->tls_type == ent->tls_type)
4511 {
4512 dent->got.refcount += ent->got.refcount;
4513 *entp = ent->next;
4514 break;
4515 }
4516 if (dent == NULL)
4517 entp = &ent->next;
4518 }
4519 *entp = edir->elf.got.glist;
4520 }
4521
4522 edir->elf.got.glist = eind->elf.got.glist;
4523 eind->elf.got.glist = NULL;
4524 }
4525
4526 /* And plt entries. */
4527 move_plt_plist (eind, edir);
4528
4529 if (eind->elf.dynindx != -1)
4530 {
4531 if (edir->elf.dynindx != -1)
4532 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4533 edir->elf.dynstr_index);
4534 edir->elf.dynindx = eind->elf.dynindx;
4535 edir->elf.dynstr_index = eind->elf.dynstr_index;
4536 eind->elf.dynindx = -1;
4537 eind->elf.dynstr_index = 0;
4538 }
4539 }
4540
4541 /* Find the function descriptor hash entry from the given function code
4542 hash entry FH. Link the entries via their OH fields. */
4543
4544 static struct ppc_link_hash_entry *
4545 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4546 {
4547 struct ppc_link_hash_entry *fdh = fh->oh;
4548
4549 if (fdh == NULL)
4550 {
4551 const char *fd_name = fh->elf.root.root.string + 1;
4552
4553 fdh = (struct ppc_link_hash_entry *)
4554 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4555 if (fdh == NULL)
4556 return fdh;
4557
4558 fdh->is_func_descriptor = 1;
4559 fdh->oh = fh;
4560 fh->is_func = 1;
4561 fh->oh = fdh;
4562 }
4563
4564 return ppc_follow_link (fdh);
4565 }
4566
4567 /* Make a fake function descriptor sym for the code sym FH. */
4568
4569 static struct ppc_link_hash_entry *
4570 make_fdh (struct bfd_link_info *info,
4571 struct ppc_link_hash_entry *fh)
4572 {
4573 bfd *abfd;
4574 asymbol *newsym;
4575 struct bfd_link_hash_entry *bh;
4576 struct ppc_link_hash_entry *fdh;
4577
4578 abfd = fh->elf.root.u.undef.abfd;
4579 newsym = bfd_make_empty_symbol (abfd);
4580 newsym->name = fh->elf.root.root.string + 1;
4581 newsym->section = bfd_und_section_ptr;
4582 newsym->value = 0;
4583 newsym->flags = BSF_WEAK;
4584
4585 bh = NULL;
4586 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4587 newsym->flags, newsym->section,
4588 newsym->value, NULL, FALSE, FALSE,
4589 &bh))
4590 return NULL;
4591
4592 fdh = (struct ppc_link_hash_entry *) bh;
4593 fdh->elf.non_elf = 0;
4594 fdh->fake = 1;
4595 fdh->is_func_descriptor = 1;
4596 fdh->oh = fh;
4597 fh->is_func = 1;
4598 fh->oh = fdh;
4599 return fdh;
4600 }
4601
4602 /* Fix function descriptor symbols defined in .opd sections to be
4603 function type. */
4604
4605 static bfd_boolean
4606 ppc64_elf_add_symbol_hook (bfd *ibfd,
4607 struct bfd_link_info *info,
4608 Elf_Internal_Sym *isym,
4609 const char **name ATTRIBUTE_UNUSED,
4610 flagword *flags ATTRIBUTE_UNUSED,
4611 asection **sec,
4612 bfd_vma *value ATTRIBUTE_UNUSED)
4613 {
4614 if ((ibfd->flags & DYNAMIC) == 0
4615 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4616 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4617
4618 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4619 {
4620 if ((ibfd->flags & DYNAMIC) == 0)
4621 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4622 }
4623 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4624 ;
4625 else if (*sec != NULL
4626 && strcmp ((*sec)->name, ".opd") == 0)
4627 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4628
4629 return TRUE;
4630 }
4631
4632 /* This function makes an old ABI object reference to ".bar" cause the
4633 inclusion of a new ABI object archive that defines "bar".
4634 NAME is a symbol defined in an archive. Return a symbol in the hash
4635 table that might be satisfied by the archive symbols. */
4636
4637 static struct elf_link_hash_entry *
4638 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4639 struct bfd_link_info *info,
4640 const char *name)
4641 {
4642 struct elf_link_hash_entry *h;
4643 char *dot_name;
4644 size_t len;
4645
4646 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4647 if (h != NULL
4648 /* Don't return this sym if it is a fake function descriptor
4649 created by add_symbol_adjust. */
4650 && !(h->root.type == bfd_link_hash_undefweak
4651 && ((struct ppc_link_hash_entry *) h)->fake))
4652 return h;
4653
4654 if (name[0] == '.')
4655 return h;
4656
4657 len = strlen (name);
4658 dot_name = bfd_alloc (abfd, len + 2);
4659 if (dot_name == NULL)
4660 return (struct elf_link_hash_entry *) 0 - 1;
4661 dot_name[0] = '.';
4662 memcpy (dot_name + 1, name, len + 1);
4663 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4664 bfd_release (abfd, dot_name);
4665 return h;
4666 }
4667
4668 /* This function satisfies all old ABI object references to ".bar" if a
4669 new ABI object defines "bar". Well, at least, undefined dot symbols
4670 are made weak. This stops later archive searches from including an
4671 object if we already have a function descriptor definition. It also
4672 prevents the linker complaining about undefined symbols.
4673 We also check and correct mismatched symbol visibility here. The
4674 most restrictive visibility of the function descriptor and the
4675 function entry symbol is used. */
4676
4677 static bfd_boolean
4678 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4679 {
4680 struct ppc_link_hash_table *htab;
4681 struct ppc_link_hash_entry *fdh;
4682
4683 if (eh->elf.root.type == bfd_link_hash_indirect)
4684 return TRUE;
4685
4686 if (eh->elf.root.type == bfd_link_hash_warning)
4687 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4688
4689 if (eh->elf.root.root.string[0] != '.')
4690 abort ();
4691
4692 htab = ppc_hash_table (info);
4693 if (htab == NULL)
4694 return FALSE;
4695
4696 fdh = lookup_fdh (eh, htab);
4697 if (fdh == NULL)
4698 {
4699 if (!info->relocatable
4700 && (eh->elf.root.type == bfd_link_hash_undefined
4701 || eh->elf.root.type == bfd_link_hash_undefweak)
4702 && eh->elf.ref_regular)
4703 {
4704 /* Make an undefweak function descriptor sym, which is enough to
4705 pull in an --as-needed shared lib, but won't cause link
4706 errors. Archives are handled elsewhere. */
4707 fdh = make_fdh (info, eh);
4708 if (fdh == NULL)
4709 return FALSE;
4710 fdh->elf.ref_regular = 1;
4711 }
4712 }
4713 else
4714 {
4715 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4716 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4717 if (entry_vis < descr_vis)
4718 fdh->elf.other += entry_vis - descr_vis;
4719 else if (entry_vis > descr_vis)
4720 eh->elf.other += descr_vis - entry_vis;
4721
4722 if ((fdh->elf.root.type == bfd_link_hash_defined
4723 || fdh->elf.root.type == bfd_link_hash_defweak)
4724 && eh->elf.root.type == bfd_link_hash_undefined)
4725 {
4726 eh->elf.root.type = bfd_link_hash_undefweak;
4727 eh->was_undefined = 1;
4728 htab->twiddled_syms = 1;
4729 }
4730 }
4731
4732 return TRUE;
4733 }
4734
4735 /* Process list of dot-symbols we made in link_hash_newfunc. */
4736
4737 static bfd_boolean
4738 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4739 {
4740 struct ppc_link_hash_table *htab;
4741 struct ppc_link_hash_entry **p, *eh;
4742
4743 if (!is_ppc64_elf (info->output_bfd))
4744 return TRUE;
4745 htab = ppc_hash_table (info);
4746 if (htab == NULL)
4747 return FALSE;
4748
4749 if (is_ppc64_elf (ibfd))
4750 {
4751 p = &htab->dot_syms;
4752 while ((eh = *p) != NULL)
4753 {
4754 *p = NULL;
4755 if (!add_symbol_adjust (eh, info))
4756 return FALSE;
4757 p = &eh->u.next_dot_sym;
4758 }
4759 }
4760
4761 /* Clear the list for non-ppc64 input files. */
4762 p = &htab->dot_syms;
4763 while ((eh = *p) != NULL)
4764 {
4765 *p = NULL;
4766 p = &eh->u.next_dot_sym;
4767 }
4768
4769 /* We need to fix the undefs list for any syms we have twiddled to
4770 undef_weak. */
4771 if (htab->twiddled_syms)
4772 {
4773 bfd_link_repair_undef_list (&htab->elf.root);
4774 htab->twiddled_syms = 0;
4775 }
4776 return TRUE;
4777 }
4778
4779 /* Undo hash table changes when an --as-needed input file is determined
4780 not to be needed. */
4781
4782 static bfd_boolean
4783 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4784 struct bfd_link_info *info)
4785 {
4786 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4787
4788 if (htab == NULL)
4789 return FALSE;
4790
4791 htab->dot_syms = NULL;
4792 return TRUE;
4793 }
4794
4795 /* If --just-symbols against a final linked binary, then assume we need
4796 toc adjusting stubs when calling functions defined there. */
4797
4798 static void
4799 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4800 {
4801 if ((sec->flags & SEC_CODE) != 0
4802 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4803 && is_ppc64_elf (sec->owner))
4804 {
4805 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4806 if (got != NULL
4807 && got->size >= elf_backend_got_header_size
4808 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4809 sec->has_toc_reloc = 1;
4810 }
4811 _bfd_elf_link_just_syms (sec, info);
4812 }
4813
4814 static struct plt_entry **
4815 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4816 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4817 {
4818 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4819 struct plt_entry **local_plt;
4820 unsigned char *local_got_tls_masks;
4821
4822 if (local_got_ents == NULL)
4823 {
4824 bfd_size_type size = symtab_hdr->sh_info;
4825
4826 size *= (sizeof (*local_got_ents)
4827 + sizeof (*local_plt)
4828 + sizeof (*local_got_tls_masks));
4829 local_got_ents = bfd_zalloc (abfd, size);
4830 if (local_got_ents == NULL)
4831 return NULL;
4832 elf_local_got_ents (abfd) = local_got_ents;
4833 }
4834
4835 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4836 {
4837 struct got_entry *ent;
4838
4839 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4840 if (ent->addend == r_addend
4841 && ent->owner == abfd
4842 && ent->tls_type == tls_type)
4843 break;
4844 if (ent == NULL)
4845 {
4846 bfd_size_type amt = sizeof (*ent);
4847 ent = bfd_alloc (abfd, amt);
4848 if (ent == NULL)
4849 return FALSE;
4850 ent->next = local_got_ents[r_symndx];
4851 ent->addend = r_addend;
4852 ent->owner = abfd;
4853 ent->tls_type = tls_type;
4854 ent->is_indirect = FALSE;
4855 ent->got.refcount = 0;
4856 local_got_ents[r_symndx] = ent;
4857 }
4858 ent->got.refcount += 1;
4859 }
4860
4861 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4862 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4863 local_got_tls_masks[r_symndx] |= tls_type;
4864
4865 return local_plt + r_symndx;
4866 }
4867
4868 static bfd_boolean
4869 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4870 {
4871 struct plt_entry *ent;
4872
4873 for (ent = *plist; ent != NULL; ent = ent->next)
4874 if (ent->addend == addend)
4875 break;
4876 if (ent == NULL)
4877 {
4878 bfd_size_type amt = sizeof (*ent);
4879 ent = bfd_alloc (abfd, amt);
4880 if (ent == NULL)
4881 return FALSE;
4882 ent->next = *plist;
4883 ent->addend = addend;
4884 ent->plt.refcount = 0;
4885 *plist = ent;
4886 }
4887 ent->plt.refcount += 1;
4888 return TRUE;
4889 }
4890
4891 static bfd_boolean
4892 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4893 {
4894 return (r_type == R_PPC64_REL24
4895 || r_type == R_PPC64_REL14
4896 || r_type == R_PPC64_REL14_BRTAKEN
4897 || r_type == R_PPC64_REL14_BRNTAKEN
4898 || r_type == R_PPC64_ADDR24
4899 || r_type == R_PPC64_ADDR14
4900 || r_type == R_PPC64_ADDR14_BRTAKEN
4901 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4902 }
4903
4904 /* Look through the relocs for a section during the first phase, and
4905 calculate needed space in the global offset table, procedure
4906 linkage table, and dynamic reloc sections. */
4907
4908 static bfd_boolean
4909 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4910 asection *sec, const Elf_Internal_Rela *relocs)
4911 {
4912 struct ppc_link_hash_table *htab;
4913 Elf_Internal_Shdr *symtab_hdr;
4914 struct elf_link_hash_entry **sym_hashes;
4915 const Elf_Internal_Rela *rel;
4916 const Elf_Internal_Rela *rel_end;
4917 asection *sreloc;
4918 asection **opd_sym_map;
4919 struct elf_link_hash_entry *tga, *dottga;
4920
4921 if (info->relocatable)
4922 return TRUE;
4923
4924 /* Don't do anything special with non-loaded, non-alloced sections.
4925 In particular, any relocs in such sections should not affect GOT
4926 and PLT reference counting (ie. we don't allow them to create GOT
4927 or PLT entries), there's no possibility or desire to optimize TLS
4928 relocs, and there's not much point in propagating relocs to shared
4929 libs that the dynamic linker won't relocate. */
4930 if ((sec->flags & SEC_ALLOC) == 0)
4931 return TRUE;
4932
4933 BFD_ASSERT (is_ppc64_elf (abfd));
4934
4935 htab = ppc_hash_table (info);
4936 if (htab == NULL)
4937 return FALSE;
4938
4939 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4940 FALSE, FALSE, TRUE);
4941 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4942 FALSE, FALSE, TRUE);
4943 symtab_hdr = &elf_symtab_hdr (abfd);
4944 sym_hashes = elf_sym_hashes (abfd);
4945 sreloc = NULL;
4946 opd_sym_map = NULL;
4947 if (strcmp (sec->name, ".opd") == 0)
4948 {
4949 /* Garbage collection needs some extra help with .opd sections.
4950 We don't want to necessarily keep everything referenced by
4951 relocs in .opd, as that would keep all functions. Instead,
4952 if we reference an .opd symbol (a function descriptor), we
4953 want to keep the function code symbol's section. This is
4954 easy for global symbols, but for local syms we need to keep
4955 information about the associated function section. */
4956 bfd_size_type amt;
4957
4958 amt = sec->size * sizeof (*opd_sym_map) / 8;
4959 opd_sym_map = bfd_zalloc (abfd, amt);
4960 if (opd_sym_map == NULL)
4961 return FALSE;
4962 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4963 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4964 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4965 }
4966
4967 if (htab->sfpr == NULL
4968 && !create_linkage_sections (htab->elf.dynobj, info))
4969 return FALSE;
4970
4971 rel_end = relocs + sec->reloc_count;
4972 for (rel = relocs; rel < rel_end; rel++)
4973 {
4974 unsigned long r_symndx;
4975 struct elf_link_hash_entry *h;
4976 enum elf_ppc64_reloc_type r_type;
4977 int tls_type;
4978 struct _ppc64_elf_section_data *ppc64_sec;
4979 struct plt_entry **ifunc;
4980
4981 r_symndx = ELF64_R_SYM (rel->r_info);
4982 if (r_symndx < symtab_hdr->sh_info)
4983 h = NULL;
4984 else
4985 {
4986 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4987 h = elf_follow_link (h);
4988 }
4989
4990 tls_type = 0;
4991 ifunc = NULL;
4992 if (h != NULL)
4993 {
4994 if (h->type == STT_GNU_IFUNC)
4995 {
4996 h->needs_plt = 1;
4997 ifunc = &h->plt.plist;
4998 }
4999 }
5000 else
5001 {
5002 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5003 abfd, r_symndx);
5004 if (isym == NULL)
5005 return FALSE;
5006
5007 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5008 {
5009 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5010 rel->r_addend, PLT_IFUNC);
5011 if (ifunc == NULL)
5012 return FALSE;
5013 }
5014 }
5015 r_type = ELF64_R_TYPE (rel->r_info);
5016 if (is_branch_reloc (r_type))
5017 {
5018 if (h != NULL && (h == tga || h == dottga))
5019 {
5020 if (rel != relocs
5021 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5022 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5023 /* We have a new-style __tls_get_addr call with a marker
5024 reloc. */
5025 ;
5026 else
5027 /* Mark this section as having an old-style call. */
5028 sec->has_tls_get_addr_call = 1;
5029 }
5030
5031 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5032 if (ifunc != NULL
5033 && !update_plt_info (abfd, ifunc, rel->r_addend))
5034 return FALSE;
5035 }
5036
5037 switch (r_type)
5038 {
5039 case R_PPC64_TLSGD:
5040 case R_PPC64_TLSLD:
5041 /* These special tls relocs tie a call to __tls_get_addr with
5042 its parameter symbol. */
5043 break;
5044
5045 case R_PPC64_GOT_TLSLD16:
5046 case R_PPC64_GOT_TLSLD16_LO:
5047 case R_PPC64_GOT_TLSLD16_HI:
5048 case R_PPC64_GOT_TLSLD16_HA:
5049 tls_type = TLS_TLS | TLS_LD;
5050 goto dogottls;
5051
5052 case R_PPC64_GOT_TLSGD16:
5053 case R_PPC64_GOT_TLSGD16_LO:
5054 case R_PPC64_GOT_TLSGD16_HI:
5055 case R_PPC64_GOT_TLSGD16_HA:
5056 tls_type = TLS_TLS | TLS_GD;
5057 goto dogottls;
5058
5059 case R_PPC64_GOT_TPREL16_DS:
5060 case R_PPC64_GOT_TPREL16_LO_DS:
5061 case R_PPC64_GOT_TPREL16_HI:
5062 case R_PPC64_GOT_TPREL16_HA:
5063 if (!info->executable)
5064 info->flags |= DF_STATIC_TLS;
5065 tls_type = TLS_TLS | TLS_TPREL;
5066 goto dogottls;
5067
5068 case R_PPC64_GOT_DTPREL16_DS:
5069 case R_PPC64_GOT_DTPREL16_LO_DS:
5070 case R_PPC64_GOT_DTPREL16_HI:
5071 case R_PPC64_GOT_DTPREL16_HA:
5072 tls_type = TLS_TLS | TLS_DTPREL;
5073 dogottls:
5074 sec->has_tls_reloc = 1;
5075 /* Fall thru */
5076
5077 case R_PPC64_GOT16:
5078 case R_PPC64_GOT16_DS:
5079 case R_PPC64_GOT16_HA:
5080 case R_PPC64_GOT16_HI:
5081 case R_PPC64_GOT16_LO:
5082 case R_PPC64_GOT16_LO_DS:
5083 /* This symbol requires a global offset table entry. */
5084 sec->has_toc_reloc = 1;
5085 if (r_type == R_PPC64_GOT_TLSLD16
5086 || r_type == R_PPC64_GOT_TLSGD16
5087 || r_type == R_PPC64_GOT_TPREL16_DS
5088 || r_type == R_PPC64_GOT_DTPREL16_DS
5089 || r_type == R_PPC64_GOT16
5090 || r_type == R_PPC64_GOT16_DS)
5091 {
5092 htab->do_multi_toc = 1;
5093 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5094 }
5095
5096 if (ppc64_elf_tdata (abfd)->got == NULL
5097 && !create_got_section (abfd, info))
5098 return FALSE;
5099
5100 if (h != NULL)
5101 {
5102 struct ppc_link_hash_entry *eh;
5103 struct got_entry *ent;
5104
5105 eh = (struct ppc_link_hash_entry *) h;
5106 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5107 if (ent->addend == rel->r_addend
5108 && ent->owner == abfd
5109 && ent->tls_type == tls_type)
5110 break;
5111 if (ent == NULL)
5112 {
5113 bfd_size_type amt = sizeof (*ent);
5114 ent = bfd_alloc (abfd, amt);
5115 if (ent == NULL)
5116 return FALSE;
5117 ent->next = eh->elf.got.glist;
5118 ent->addend = rel->r_addend;
5119 ent->owner = abfd;
5120 ent->tls_type = tls_type;
5121 ent->is_indirect = FALSE;
5122 ent->got.refcount = 0;
5123 eh->elf.got.glist = ent;
5124 }
5125 ent->got.refcount += 1;
5126 eh->tls_mask |= tls_type;
5127 }
5128 else
5129 /* This is a global offset table entry for a local symbol. */
5130 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5131 rel->r_addend, tls_type))
5132 return FALSE;
5133 break;
5134
5135 case R_PPC64_PLT16_HA:
5136 case R_PPC64_PLT16_HI:
5137 case R_PPC64_PLT16_LO:
5138 case R_PPC64_PLT32:
5139 case R_PPC64_PLT64:
5140 /* This symbol requires a procedure linkage table entry. We
5141 actually build the entry in adjust_dynamic_symbol,
5142 because this might be a case of linking PIC code without
5143 linking in any dynamic objects, in which case we don't
5144 need to generate a procedure linkage table after all. */
5145 if (h == NULL)
5146 {
5147 /* It does not make sense to have a procedure linkage
5148 table entry for a local symbol. */
5149 bfd_set_error (bfd_error_bad_value);
5150 return FALSE;
5151 }
5152 else
5153 {
5154 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5155 return FALSE;
5156 h->needs_plt = 1;
5157 if (h->root.root.string[0] == '.'
5158 && h->root.root.string[1] != '\0')
5159 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5160 }
5161 break;
5162
5163 /* The following relocations don't need to propagate the
5164 relocation if linking a shared object since they are
5165 section relative. */
5166 case R_PPC64_SECTOFF:
5167 case R_PPC64_SECTOFF_LO:
5168 case R_PPC64_SECTOFF_HI:
5169 case R_PPC64_SECTOFF_HA:
5170 case R_PPC64_SECTOFF_DS:
5171 case R_PPC64_SECTOFF_LO_DS:
5172 case R_PPC64_DTPREL16:
5173 case R_PPC64_DTPREL16_LO:
5174 case R_PPC64_DTPREL16_HI:
5175 case R_PPC64_DTPREL16_HA:
5176 case R_PPC64_DTPREL16_DS:
5177 case R_PPC64_DTPREL16_LO_DS:
5178 case R_PPC64_DTPREL16_HIGHER:
5179 case R_PPC64_DTPREL16_HIGHERA:
5180 case R_PPC64_DTPREL16_HIGHEST:
5181 case R_PPC64_DTPREL16_HIGHESTA:
5182 break;
5183
5184 /* Nor do these. */
5185 case R_PPC64_REL16:
5186 case R_PPC64_REL16_LO:
5187 case R_PPC64_REL16_HI:
5188 case R_PPC64_REL16_HA:
5189 break;
5190
5191 case R_PPC64_TOC16:
5192 case R_PPC64_TOC16_DS:
5193 htab->do_multi_toc = 1;
5194 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5195 case R_PPC64_TOC16_LO:
5196 case R_PPC64_TOC16_HI:
5197 case R_PPC64_TOC16_HA:
5198 case R_PPC64_TOC16_LO_DS:
5199 sec->has_toc_reloc = 1;
5200 break;
5201
5202 /* This relocation describes the C++ object vtable hierarchy.
5203 Reconstruct it for later use during GC. */
5204 case R_PPC64_GNU_VTINHERIT:
5205 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5206 return FALSE;
5207 break;
5208
5209 /* This relocation describes which C++ vtable entries are actually
5210 used. Record for later use during GC. */
5211 case R_PPC64_GNU_VTENTRY:
5212 BFD_ASSERT (h != NULL);
5213 if (h != NULL
5214 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5215 return FALSE;
5216 break;
5217
5218 case R_PPC64_REL14:
5219 case R_PPC64_REL14_BRTAKEN:
5220 case R_PPC64_REL14_BRNTAKEN:
5221 {
5222 asection *dest = NULL;
5223
5224 /* Heuristic: If jumping outside our section, chances are
5225 we are going to need a stub. */
5226 if (h != NULL)
5227 {
5228 /* If the sym is weak it may be overridden later, so
5229 don't assume we know where a weak sym lives. */
5230 if (h->root.type == bfd_link_hash_defined)
5231 dest = h->root.u.def.section;
5232 }
5233 else
5234 {
5235 Elf_Internal_Sym *isym;
5236
5237 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5238 abfd, r_symndx);
5239 if (isym == NULL)
5240 return FALSE;
5241
5242 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5243 }
5244
5245 if (dest != sec)
5246 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5247 }
5248 /* Fall through. */
5249
5250 case R_PPC64_REL24:
5251 if (h != NULL && ifunc == NULL)
5252 {
5253 /* We may need a .plt entry if the function this reloc
5254 refers to is in a shared lib. */
5255 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5256 return FALSE;
5257 h->needs_plt = 1;
5258 if (h->root.root.string[0] == '.'
5259 && h->root.root.string[1] != '\0')
5260 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5261 if (h == tga || h == dottga)
5262 sec->has_tls_reloc = 1;
5263 }
5264 break;
5265
5266 case R_PPC64_TPREL64:
5267 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5268 if (!info->executable)
5269 info->flags |= DF_STATIC_TLS;
5270 goto dotlstoc;
5271
5272 case R_PPC64_DTPMOD64:
5273 if (rel + 1 < rel_end
5274 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5275 && rel[1].r_offset == rel->r_offset + 8)
5276 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5277 else
5278 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5279 goto dotlstoc;
5280
5281 case R_PPC64_DTPREL64:
5282 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5283 if (rel != relocs
5284 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5285 && rel[-1].r_offset == rel->r_offset - 8)
5286 /* This is the second reloc of a dtpmod, dtprel pair.
5287 Don't mark with TLS_DTPREL. */
5288 goto dodyn;
5289
5290 dotlstoc:
5291 sec->has_tls_reloc = 1;
5292 if (h != NULL)
5293 {
5294 struct ppc_link_hash_entry *eh;
5295 eh = (struct ppc_link_hash_entry *) h;
5296 eh->tls_mask |= tls_type;
5297 }
5298 else
5299 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5300 rel->r_addend, tls_type))
5301 return FALSE;
5302
5303 ppc64_sec = ppc64_elf_section_data (sec);
5304 if (ppc64_sec->sec_type != sec_toc)
5305 {
5306 bfd_size_type amt;
5307
5308 /* One extra to simplify get_tls_mask. */
5309 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5310 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5311 if (ppc64_sec->u.toc.symndx == NULL)
5312 return FALSE;
5313 amt = sec->size * sizeof (bfd_vma) / 8;
5314 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5315 if (ppc64_sec->u.toc.add == NULL)
5316 return FALSE;
5317 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5318 ppc64_sec->sec_type = sec_toc;
5319 }
5320 BFD_ASSERT (rel->r_offset % 8 == 0);
5321 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5322 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5323
5324 /* Mark the second slot of a GD or LD entry.
5325 -1 to indicate GD and -2 to indicate LD. */
5326 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5327 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5328 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5329 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5330 goto dodyn;
5331
5332 case R_PPC64_TPREL16:
5333 case R_PPC64_TPREL16_LO:
5334 case R_PPC64_TPREL16_HI:
5335 case R_PPC64_TPREL16_HA:
5336 case R_PPC64_TPREL16_DS:
5337 case R_PPC64_TPREL16_LO_DS:
5338 case R_PPC64_TPREL16_HIGHER:
5339 case R_PPC64_TPREL16_HIGHERA:
5340 case R_PPC64_TPREL16_HIGHEST:
5341 case R_PPC64_TPREL16_HIGHESTA:
5342 if (info->shared)
5343 {
5344 if (!info->executable)
5345 info->flags |= DF_STATIC_TLS;
5346 goto dodyn;
5347 }
5348 break;
5349
5350 case R_PPC64_ADDR64:
5351 if (opd_sym_map != NULL
5352 && rel + 1 < rel_end
5353 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5354 {
5355 if (h != NULL)
5356 {
5357 if (h->root.root.string[0] == '.'
5358 && h->root.root.string[1] != 0
5359 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5360 ;
5361 else
5362 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5363 }
5364 else
5365 {
5366 asection *s;
5367 Elf_Internal_Sym *isym;
5368
5369 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5370 abfd, r_symndx);
5371 if (isym == NULL)
5372 return FALSE;
5373
5374 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5375 if (s != NULL && s != sec)
5376 opd_sym_map[rel->r_offset / 8] = s;
5377 }
5378 }
5379 /* Fall through. */
5380
5381 case R_PPC64_REL30:
5382 case R_PPC64_REL32:
5383 case R_PPC64_REL64:
5384 case R_PPC64_ADDR14:
5385 case R_PPC64_ADDR14_BRNTAKEN:
5386 case R_PPC64_ADDR14_BRTAKEN:
5387 case R_PPC64_ADDR16:
5388 case R_PPC64_ADDR16_DS:
5389 case R_PPC64_ADDR16_HA:
5390 case R_PPC64_ADDR16_HI:
5391 case R_PPC64_ADDR16_HIGHER:
5392 case R_PPC64_ADDR16_HIGHERA:
5393 case R_PPC64_ADDR16_HIGHEST:
5394 case R_PPC64_ADDR16_HIGHESTA:
5395 case R_PPC64_ADDR16_LO:
5396 case R_PPC64_ADDR16_LO_DS:
5397 case R_PPC64_ADDR24:
5398 case R_PPC64_ADDR32:
5399 case R_PPC64_UADDR16:
5400 case R_PPC64_UADDR32:
5401 case R_PPC64_UADDR64:
5402 case R_PPC64_TOC:
5403 if (h != NULL && !info->shared)
5404 /* We may need a copy reloc. */
5405 h->non_got_ref = 1;
5406
5407 /* Don't propagate .opd relocs. */
5408 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5409 break;
5410
5411 /* If we are creating a shared library, and this is a reloc
5412 against a global symbol, or a non PC relative reloc
5413 against a local symbol, then we need to copy the reloc
5414 into the shared library. However, if we are linking with
5415 -Bsymbolic, we do not need to copy a reloc against a
5416 global symbol which is defined in an object we are
5417 including in the link (i.e., DEF_REGULAR is set). At
5418 this point we have not seen all the input files, so it is
5419 possible that DEF_REGULAR is not set now but will be set
5420 later (it is never cleared). In case of a weak definition,
5421 DEF_REGULAR may be cleared later by a strong definition in
5422 a shared library. We account for that possibility below by
5423 storing information in the dyn_relocs field of the hash
5424 table entry. A similar situation occurs when creating
5425 shared libraries and symbol visibility changes render the
5426 symbol local.
5427
5428 If on the other hand, we are creating an executable, we
5429 may need to keep relocations for symbols satisfied by a
5430 dynamic library if we manage to avoid copy relocs for the
5431 symbol. */
5432 dodyn:
5433 if ((info->shared
5434 && (must_be_dyn_reloc (info, r_type)
5435 || (h != NULL
5436 && (! info->symbolic
5437 || h->root.type == bfd_link_hash_defweak
5438 || !h->def_regular))))
5439 || (ELIMINATE_COPY_RELOCS
5440 && !info->shared
5441 && h != NULL
5442 && (h->root.type == bfd_link_hash_defweak
5443 || !h->def_regular))
5444 || (!info->shared
5445 && ifunc != NULL))
5446 {
5447 struct elf_dyn_relocs *p;
5448 struct elf_dyn_relocs **head;
5449
5450 /* We must copy these reloc types into the output file.
5451 Create a reloc section in dynobj and make room for
5452 this reloc. */
5453 if (sreloc == NULL)
5454 {
5455 sreloc = _bfd_elf_make_dynamic_reloc_section
5456 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5457
5458 if (sreloc == NULL)
5459 return FALSE;
5460 }
5461
5462 /* If this is a global symbol, we count the number of
5463 relocations we need for this symbol. */
5464 if (h != NULL)
5465 {
5466 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5467 }
5468 else
5469 {
5470 /* Track dynamic relocs needed for local syms too.
5471 We really need local syms available to do this
5472 easily. Oh well. */
5473 asection *s;
5474 void *vpp;
5475 Elf_Internal_Sym *isym;
5476
5477 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5478 abfd, r_symndx);
5479 if (isym == NULL)
5480 return FALSE;
5481
5482 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5483 if (s == NULL)
5484 s = sec;
5485
5486 vpp = &elf_section_data (s)->local_dynrel;
5487 head = (struct elf_dyn_relocs **) vpp;
5488 }
5489
5490 p = *head;
5491 if (p == NULL || p->sec != sec)
5492 {
5493 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5494 if (p == NULL)
5495 return FALSE;
5496 p->next = *head;
5497 *head = p;
5498 p->sec = sec;
5499 p->count = 0;
5500 p->pc_count = 0;
5501 }
5502
5503 p->count += 1;
5504 if (!must_be_dyn_reloc (info, r_type))
5505 p->pc_count += 1;
5506 }
5507 break;
5508
5509 default:
5510 break;
5511 }
5512 }
5513
5514 return TRUE;
5515 }
5516
5517 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5518 of the code entry point, and its section. */
5519
5520 static bfd_vma
5521 opd_entry_value (asection *opd_sec,
5522 bfd_vma offset,
5523 asection **code_sec,
5524 bfd_vma *code_off)
5525 {
5526 bfd *opd_bfd = opd_sec->owner;
5527 Elf_Internal_Rela *relocs;
5528 Elf_Internal_Rela *lo, *hi, *look;
5529 bfd_vma val;
5530
5531 /* No relocs implies we are linking a --just-symbols object. */
5532 if (opd_sec->reloc_count == 0)
5533 {
5534 char buf[8];
5535
5536 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5537 return (bfd_vma) -1;
5538
5539 val = bfd_get_64 (opd_bfd, buf);
5540 if (code_sec != NULL)
5541 {
5542 asection *sec, *likely = NULL;
5543 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5544 if (sec->vma <= val
5545 && (sec->flags & SEC_LOAD) != 0
5546 && (sec->flags & SEC_ALLOC) != 0)
5547 likely = sec;
5548 if (likely != NULL)
5549 {
5550 *code_sec = likely;
5551 if (code_off != NULL)
5552 *code_off = val - likely->vma;
5553 }
5554 }
5555 return val;
5556 }
5557
5558 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5559
5560 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5561 if (relocs == NULL)
5562 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5563
5564 /* Go find the opd reloc at the sym address. */
5565 lo = relocs;
5566 BFD_ASSERT (lo != NULL);
5567 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5568 val = (bfd_vma) -1;
5569 while (lo < hi)
5570 {
5571 look = lo + (hi - lo) / 2;
5572 if (look->r_offset < offset)
5573 lo = look + 1;
5574 else if (look->r_offset > offset)
5575 hi = look;
5576 else
5577 {
5578 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5579
5580 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5581 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5582 {
5583 unsigned long symndx = ELF64_R_SYM (look->r_info);
5584 asection *sec;
5585
5586 if (symndx < symtab_hdr->sh_info)
5587 {
5588 Elf_Internal_Sym *sym;
5589
5590 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5591 if (sym == NULL)
5592 {
5593 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5594 symtab_hdr->sh_info,
5595 0, NULL, NULL, NULL);
5596 if (sym == NULL)
5597 break;
5598 symtab_hdr->contents = (bfd_byte *) sym;
5599 }
5600
5601 sym += symndx;
5602 val = sym->st_value;
5603 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5604 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5605 }
5606 else
5607 {
5608 struct elf_link_hash_entry **sym_hashes;
5609 struct elf_link_hash_entry *rh;
5610
5611 sym_hashes = elf_sym_hashes (opd_bfd);
5612 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5613 rh = elf_follow_link (rh);
5614 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5615 || rh->root.type == bfd_link_hash_defweak);
5616 val = rh->root.u.def.value;
5617 sec = rh->root.u.def.section;
5618 }
5619 val += look->r_addend;
5620 if (code_off != NULL)
5621 *code_off = val;
5622 if (code_sec != NULL)
5623 *code_sec = sec;
5624 if (sec != NULL && sec->output_section != NULL)
5625 val += sec->output_section->vma + sec->output_offset;
5626 }
5627 break;
5628 }
5629 }
5630
5631 return val;
5632 }
5633
5634 /* Return true if symbol is defined in a regular object file. */
5635
5636 static bfd_boolean
5637 is_static_defined (struct elf_link_hash_entry *h)
5638 {
5639 return ((h->root.type == bfd_link_hash_defined
5640 || h->root.type == bfd_link_hash_defweak)
5641 && h->root.u.def.section != NULL
5642 && h->root.u.def.section->output_section != NULL);
5643 }
5644
5645 /* If FDH is a function descriptor symbol, return the associated code
5646 entry symbol if it is defined. Return NULL otherwise. */
5647
5648 static struct ppc_link_hash_entry *
5649 defined_code_entry (struct ppc_link_hash_entry *fdh)
5650 {
5651 if (fdh->is_func_descriptor)
5652 {
5653 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5654 if (fh->elf.root.type == bfd_link_hash_defined
5655 || fh->elf.root.type == bfd_link_hash_defweak)
5656 return fh;
5657 }
5658 return NULL;
5659 }
5660
5661 /* If FH is a function code entry symbol, return the associated
5662 function descriptor symbol if it is defined. Return NULL otherwise. */
5663
5664 static struct ppc_link_hash_entry *
5665 defined_func_desc (struct ppc_link_hash_entry *fh)
5666 {
5667 if (fh->oh != NULL
5668 && fh->oh->is_func_descriptor)
5669 {
5670 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5671 if (fdh->elf.root.type == bfd_link_hash_defined
5672 || fdh->elf.root.type == bfd_link_hash_defweak)
5673 return fdh;
5674 }
5675 return NULL;
5676 }
5677
5678 /* Mark all our entry sym sections, both opd and code section. */
5679
5680 static void
5681 ppc64_elf_gc_keep (struct bfd_link_info *info)
5682 {
5683 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5684 struct bfd_sym_chain *sym;
5685
5686 if (htab == NULL)
5687 return;
5688
5689 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5690 {
5691 struct ppc_link_hash_entry *eh, *fh;
5692 asection *sec;
5693
5694 eh = (struct ppc_link_hash_entry *)
5695 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5696 if (eh == NULL)
5697 continue;
5698 if (eh->elf.root.type != bfd_link_hash_defined
5699 && eh->elf.root.type != bfd_link_hash_defweak)
5700 continue;
5701
5702 fh = defined_code_entry (eh);
5703 if (fh != NULL)
5704 {
5705 sec = fh->elf.root.u.def.section;
5706 sec->flags |= SEC_KEEP;
5707 }
5708 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5709 && opd_entry_value (eh->elf.root.u.def.section,
5710 eh->elf.root.u.def.value,
5711 &sec, NULL) != (bfd_vma) -1)
5712 sec->flags |= SEC_KEEP;
5713
5714 sec = eh->elf.root.u.def.section;
5715 sec->flags |= SEC_KEEP;
5716 }
5717 }
5718
5719 /* Mark sections containing dynamically referenced symbols. When
5720 building shared libraries, we must assume that any visible symbol is
5721 referenced. */
5722
5723 static bfd_boolean
5724 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5725 {
5726 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5727 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5728 struct ppc_link_hash_entry *fdh;
5729
5730 /* Dynamic linking info is on the func descriptor sym. */
5731 fdh = defined_func_desc (eh);
5732 if (fdh != NULL)
5733 eh = fdh;
5734
5735 if ((eh->elf.root.type == bfd_link_hash_defined
5736 || eh->elf.root.type == bfd_link_hash_defweak)
5737 && (eh->elf.ref_dynamic
5738 || (!info->executable
5739 && eh->elf.def_regular
5740 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5741 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5742 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5743 || !bfd_hide_sym_by_version (info->version_info,
5744 eh->elf.root.root.string)))))
5745 {
5746 asection *code_sec;
5747 struct ppc_link_hash_entry *fh;
5748
5749 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5750
5751 /* Function descriptor syms cause the associated
5752 function code sym section to be marked. */
5753 fh = defined_code_entry (eh);
5754 if (fh != NULL)
5755 {
5756 code_sec = fh->elf.root.u.def.section;
5757 code_sec->flags |= SEC_KEEP;
5758 }
5759 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5760 && opd_entry_value (eh->elf.root.u.def.section,
5761 eh->elf.root.u.def.value,
5762 &code_sec, NULL) != (bfd_vma) -1)
5763 code_sec->flags |= SEC_KEEP;
5764 }
5765
5766 return TRUE;
5767 }
5768
5769 /* Return the section that should be marked against GC for a given
5770 relocation. */
5771
5772 static asection *
5773 ppc64_elf_gc_mark_hook (asection *sec,
5774 struct bfd_link_info *info,
5775 Elf_Internal_Rela *rel,
5776 struct elf_link_hash_entry *h,
5777 Elf_Internal_Sym *sym)
5778 {
5779 asection *rsec;
5780
5781 /* Syms return NULL if we're marking .opd, so we avoid marking all
5782 function sections, as all functions are referenced in .opd. */
5783 rsec = NULL;
5784 if (get_opd_info (sec) != NULL)
5785 return rsec;
5786
5787 if (h != NULL)
5788 {
5789 enum elf_ppc64_reloc_type r_type;
5790 struct ppc_link_hash_entry *eh, *fh, *fdh;
5791
5792 r_type = ELF64_R_TYPE (rel->r_info);
5793 switch (r_type)
5794 {
5795 case R_PPC64_GNU_VTINHERIT:
5796 case R_PPC64_GNU_VTENTRY:
5797 break;
5798
5799 default:
5800 switch (h->root.type)
5801 {
5802 case bfd_link_hash_defined:
5803 case bfd_link_hash_defweak:
5804 eh = (struct ppc_link_hash_entry *) h;
5805 fdh = defined_func_desc (eh);
5806 if (fdh != NULL)
5807 eh = fdh;
5808
5809 /* Function descriptor syms cause the associated
5810 function code sym section to be marked. */
5811 fh = defined_code_entry (eh);
5812 if (fh != NULL)
5813 {
5814 /* They also mark their opd section. */
5815 eh->elf.root.u.def.section->gc_mark = 1;
5816
5817 rsec = fh->elf.root.u.def.section;
5818 }
5819 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5820 && opd_entry_value (eh->elf.root.u.def.section,
5821 eh->elf.root.u.def.value,
5822 &rsec, NULL) != (bfd_vma) -1)
5823 eh->elf.root.u.def.section->gc_mark = 1;
5824 else
5825 rsec = h->root.u.def.section;
5826 break;
5827
5828 case bfd_link_hash_common:
5829 rsec = h->root.u.c.p->section;
5830 break;
5831
5832 default:
5833 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5834 }
5835 }
5836 }
5837 else
5838 {
5839 struct _opd_sec_data *opd;
5840
5841 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5842 opd = get_opd_info (rsec);
5843 if (opd != NULL && opd->func_sec != NULL)
5844 {
5845 rsec->gc_mark = 1;
5846
5847 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5848 }
5849 }
5850
5851 return rsec;
5852 }
5853
5854 /* Update the .got, .plt. and dynamic reloc reference counts for the
5855 section being removed. */
5856
5857 static bfd_boolean
5858 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5859 asection *sec, const Elf_Internal_Rela *relocs)
5860 {
5861 struct ppc_link_hash_table *htab;
5862 Elf_Internal_Shdr *symtab_hdr;
5863 struct elf_link_hash_entry **sym_hashes;
5864 struct got_entry **local_got_ents;
5865 const Elf_Internal_Rela *rel, *relend;
5866
5867 if (info->relocatable)
5868 return TRUE;
5869
5870 if ((sec->flags & SEC_ALLOC) == 0)
5871 return TRUE;
5872
5873 elf_section_data (sec)->local_dynrel = NULL;
5874
5875 htab = ppc_hash_table (info);
5876 if (htab == NULL)
5877 return FALSE;
5878
5879 symtab_hdr = &elf_symtab_hdr (abfd);
5880 sym_hashes = elf_sym_hashes (abfd);
5881 local_got_ents = elf_local_got_ents (abfd);
5882
5883 relend = relocs + sec->reloc_count;
5884 for (rel = relocs; rel < relend; rel++)
5885 {
5886 unsigned long r_symndx;
5887 enum elf_ppc64_reloc_type r_type;
5888 struct elf_link_hash_entry *h = NULL;
5889 unsigned char tls_type = 0;
5890
5891 r_symndx = ELF64_R_SYM (rel->r_info);
5892 r_type = ELF64_R_TYPE (rel->r_info);
5893 if (r_symndx >= symtab_hdr->sh_info)
5894 {
5895 struct ppc_link_hash_entry *eh;
5896 struct elf_dyn_relocs **pp;
5897 struct elf_dyn_relocs *p;
5898
5899 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5900 h = elf_follow_link (h);
5901 eh = (struct ppc_link_hash_entry *) h;
5902
5903 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5904 if (p->sec == sec)
5905 {
5906 /* Everything must go for SEC. */
5907 *pp = p->next;
5908 break;
5909 }
5910 }
5911
5912 if (is_branch_reloc (r_type))
5913 {
5914 struct plt_entry **ifunc = NULL;
5915 if (h != NULL)
5916 {
5917 if (h->type == STT_GNU_IFUNC)
5918 ifunc = &h->plt.plist;
5919 }
5920 else if (local_got_ents != NULL)
5921 {
5922 struct plt_entry **local_plt = (struct plt_entry **)
5923 (local_got_ents + symtab_hdr->sh_info);
5924 unsigned char *local_got_tls_masks = (unsigned char *)
5925 (local_plt + symtab_hdr->sh_info);
5926 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5927 ifunc = local_plt + r_symndx;
5928 }
5929 if (ifunc != NULL)
5930 {
5931 struct plt_entry *ent;
5932
5933 for (ent = *ifunc; ent != NULL; ent = ent->next)
5934 if (ent->addend == rel->r_addend)
5935 break;
5936 if (ent == NULL)
5937 abort ();
5938 if (ent->plt.refcount > 0)
5939 ent->plt.refcount -= 1;
5940 continue;
5941 }
5942 }
5943
5944 switch (r_type)
5945 {
5946 case R_PPC64_GOT_TLSLD16:
5947 case R_PPC64_GOT_TLSLD16_LO:
5948 case R_PPC64_GOT_TLSLD16_HI:
5949 case R_PPC64_GOT_TLSLD16_HA:
5950 tls_type = TLS_TLS | TLS_LD;
5951 goto dogot;
5952
5953 case R_PPC64_GOT_TLSGD16:
5954 case R_PPC64_GOT_TLSGD16_LO:
5955 case R_PPC64_GOT_TLSGD16_HI:
5956 case R_PPC64_GOT_TLSGD16_HA:
5957 tls_type = TLS_TLS | TLS_GD;
5958 goto dogot;
5959
5960 case R_PPC64_GOT_TPREL16_DS:
5961 case R_PPC64_GOT_TPREL16_LO_DS:
5962 case R_PPC64_GOT_TPREL16_HI:
5963 case R_PPC64_GOT_TPREL16_HA:
5964 tls_type = TLS_TLS | TLS_TPREL;
5965 goto dogot;
5966
5967 case R_PPC64_GOT_DTPREL16_DS:
5968 case R_PPC64_GOT_DTPREL16_LO_DS:
5969 case R_PPC64_GOT_DTPREL16_HI:
5970 case R_PPC64_GOT_DTPREL16_HA:
5971 tls_type = TLS_TLS | TLS_DTPREL;
5972 goto dogot;
5973
5974 case R_PPC64_GOT16:
5975 case R_PPC64_GOT16_DS:
5976 case R_PPC64_GOT16_HA:
5977 case R_PPC64_GOT16_HI:
5978 case R_PPC64_GOT16_LO:
5979 case R_PPC64_GOT16_LO_DS:
5980 dogot:
5981 {
5982 struct got_entry *ent;
5983
5984 if (h != NULL)
5985 ent = h->got.glist;
5986 else
5987 ent = local_got_ents[r_symndx];
5988
5989 for (; ent != NULL; ent = ent->next)
5990 if (ent->addend == rel->r_addend
5991 && ent->owner == abfd
5992 && ent->tls_type == tls_type)
5993 break;
5994 if (ent == NULL)
5995 abort ();
5996 if (ent->got.refcount > 0)
5997 ent->got.refcount -= 1;
5998 }
5999 break;
6000
6001 case R_PPC64_PLT16_HA:
6002 case R_PPC64_PLT16_HI:
6003 case R_PPC64_PLT16_LO:
6004 case R_PPC64_PLT32:
6005 case R_PPC64_PLT64:
6006 case R_PPC64_REL14:
6007 case R_PPC64_REL14_BRNTAKEN:
6008 case R_PPC64_REL14_BRTAKEN:
6009 case R_PPC64_REL24:
6010 if (h != NULL)
6011 {
6012 struct plt_entry *ent;
6013
6014 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6015 if (ent->addend == rel->r_addend)
6016 break;
6017 if (ent != NULL && ent->plt.refcount > 0)
6018 ent->plt.refcount -= 1;
6019 }
6020 break;
6021
6022 default:
6023 break;
6024 }
6025 }
6026 return TRUE;
6027 }
6028
6029 /* The maximum size of .sfpr. */
6030 #define SFPR_MAX (218*4)
6031
6032 struct sfpr_def_parms
6033 {
6034 const char name[12];
6035 unsigned char lo, hi;
6036 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6037 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6038 };
6039
6040 /* Auto-generate _save*, _rest* functions in .sfpr. */
6041
6042 static bfd_boolean
6043 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6044 {
6045 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6046 unsigned int i;
6047 size_t len = strlen (parm->name);
6048 bfd_boolean writing = FALSE;
6049 char sym[16];
6050
6051 if (htab == NULL)
6052 return FALSE;
6053
6054 memcpy (sym, parm->name, len);
6055 sym[len + 2] = 0;
6056
6057 for (i = parm->lo; i <= parm->hi; i++)
6058 {
6059 struct elf_link_hash_entry *h;
6060
6061 sym[len + 0] = i / 10 + '0';
6062 sym[len + 1] = i % 10 + '0';
6063 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6064 if (h != NULL
6065 && !h->def_regular)
6066 {
6067 h->root.type = bfd_link_hash_defined;
6068 h->root.u.def.section = htab->sfpr;
6069 h->root.u.def.value = htab->sfpr->size;
6070 h->type = STT_FUNC;
6071 h->def_regular = 1;
6072 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6073 writing = TRUE;
6074 if (htab->sfpr->contents == NULL)
6075 {
6076 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6077 if (htab->sfpr->contents == NULL)
6078 return FALSE;
6079 }
6080 }
6081 if (writing)
6082 {
6083 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6084 if (i != parm->hi)
6085 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6086 else
6087 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6088 htab->sfpr->size = p - htab->sfpr->contents;
6089 }
6090 }
6091
6092 return TRUE;
6093 }
6094
6095 static bfd_byte *
6096 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6097 {
6098 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6099 return p + 4;
6100 }
6101
6102 static bfd_byte *
6103 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6104 {
6105 p = savegpr0 (abfd, p, r);
6106 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6107 p = p + 4;
6108 bfd_put_32 (abfd, BLR, p);
6109 return p + 4;
6110 }
6111
6112 static bfd_byte *
6113 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6114 {
6115 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6116 return p + 4;
6117 }
6118
6119 static bfd_byte *
6120 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6121 {
6122 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6123 p = p + 4;
6124 p = restgpr0 (abfd, p, r);
6125 bfd_put_32 (abfd, MTLR_R0, p);
6126 p = p + 4;
6127 if (r == 29)
6128 {
6129 p = restgpr0 (abfd, p, 30);
6130 p = restgpr0 (abfd, p, 31);
6131 }
6132 bfd_put_32 (abfd, BLR, p);
6133 return p + 4;
6134 }
6135
6136 static bfd_byte *
6137 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6138 {
6139 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6140 return p + 4;
6141 }
6142
6143 static bfd_byte *
6144 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6145 {
6146 p = savegpr1 (abfd, p, r);
6147 bfd_put_32 (abfd, BLR, p);
6148 return p + 4;
6149 }
6150
6151 static bfd_byte *
6152 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6153 {
6154 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6155 return p + 4;
6156 }
6157
6158 static bfd_byte *
6159 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6160 {
6161 p = restgpr1 (abfd, p, r);
6162 bfd_put_32 (abfd, BLR, p);
6163 return p + 4;
6164 }
6165
6166 static bfd_byte *
6167 savefpr (bfd *abfd, bfd_byte *p, int r)
6168 {
6169 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6170 return p + 4;
6171 }
6172
6173 static bfd_byte *
6174 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6175 {
6176 p = savefpr (abfd, p, r);
6177 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6178 p = p + 4;
6179 bfd_put_32 (abfd, BLR, p);
6180 return p + 4;
6181 }
6182
6183 static bfd_byte *
6184 restfpr (bfd *abfd, bfd_byte *p, int r)
6185 {
6186 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6187 return p + 4;
6188 }
6189
6190 static bfd_byte *
6191 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6192 {
6193 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6194 p = p + 4;
6195 p = restfpr (abfd, p, r);
6196 bfd_put_32 (abfd, MTLR_R0, p);
6197 p = p + 4;
6198 if (r == 29)
6199 {
6200 p = restfpr (abfd, p, 30);
6201 p = restfpr (abfd, p, 31);
6202 }
6203 bfd_put_32 (abfd, BLR, p);
6204 return p + 4;
6205 }
6206
6207 static bfd_byte *
6208 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6209 {
6210 p = savefpr (abfd, p, r);
6211 bfd_put_32 (abfd, BLR, p);
6212 return p + 4;
6213 }
6214
6215 static bfd_byte *
6216 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6217 {
6218 p = restfpr (abfd, p, r);
6219 bfd_put_32 (abfd, BLR, p);
6220 return p + 4;
6221 }
6222
6223 static bfd_byte *
6224 savevr (bfd *abfd, bfd_byte *p, int r)
6225 {
6226 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6227 p = p + 4;
6228 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6229 return p + 4;
6230 }
6231
6232 static bfd_byte *
6233 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6234 {
6235 p = savevr (abfd, p, r);
6236 bfd_put_32 (abfd, BLR, p);
6237 return p + 4;
6238 }
6239
6240 static bfd_byte *
6241 restvr (bfd *abfd, bfd_byte *p, int r)
6242 {
6243 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6244 p = p + 4;
6245 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6246 return p + 4;
6247 }
6248
6249 static bfd_byte *
6250 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6251 {
6252 p = restvr (abfd, p, r);
6253 bfd_put_32 (abfd, BLR, p);
6254 return p + 4;
6255 }
6256
6257 /* Called via elf_link_hash_traverse to transfer dynamic linking
6258 information on function code symbol entries to their corresponding
6259 function descriptor symbol entries. */
6260
6261 static bfd_boolean
6262 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6263 {
6264 struct bfd_link_info *info;
6265 struct ppc_link_hash_table *htab;
6266 struct plt_entry *ent;
6267 struct ppc_link_hash_entry *fh;
6268 struct ppc_link_hash_entry *fdh;
6269 bfd_boolean force_local;
6270
6271 fh = (struct ppc_link_hash_entry *) h;
6272 if (fh->elf.root.type == bfd_link_hash_indirect)
6273 return TRUE;
6274
6275 info = inf;
6276 htab = ppc_hash_table (info);
6277 if (htab == NULL)
6278 return FALSE;
6279
6280 /* Resolve undefined references to dot-symbols as the value
6281 in the function descriptor, if we have one in a regular object.
6282 This is to satisfy cases like ".quad .foo". Calls to functions
6283 in dynamic objects are handled elsewhere. */
6284 if (fh->elf.root.type == bfd_link_hash_undefweak
6285 && fh->was_undefined
6286 && (fdh = defined_func_desc (fh)) != NULL
6287 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6288 && opd_entry_value (fdh->elf.root.u.def.section,
6289 fdh->elf.root.u.def.value,
6290 &fh->elf.root.u.def.section,
6291 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6292 {
6293 fh->elf.root.type = fdh->elf.root.type;
6294 fh->elf.forced_local = 1;
6295 fh->elf.def_regular = fdh->elf.def_regular;
6296 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6297 }
6298
6299 /* If this is a function code symbol, transfer dynamic linking
6300 information to the function descriptor symbol. */
6301 if (!fh->is_func)
6302 return TRUE;
6303
6304 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6305 if (ent->plt.refcount > 0)
6306 break;
6307 if (ent == NULL
6308 || fh->elf.root.root.string[0] != '.'
6309 || fh->elf.root.root.string[1] == '\0')
6310 return TRUE;
6311
6312 /* Find the corresponding function descriptor symbol. Create it
6313 as undefined if necessary. */
6314
6315 fdh = lookup_fdh (fh, htab);
6316 if (fdh == NULL
6317 && !info->executable
6318 && (fh->elf.root.type == bfd_link_hash_undefined
6319 || fh->elf.root.type == bfd_link_hash_undefweak))
6320 {
6321 fdh = make_fdh (info, fh);
6322 if (fdh == NULL)
6323 return FALSE;
6324 }
6325
6326 /* Fake function descriptors are made undefweak. If the function
6327 code symbol is strong undefined, make the fake sym the same.
6328 If the function code symbol is defined, then force the fake
6329 descriptor local; We can't support overriding of symbols in a
6330 shared library on a fake descriptor. */
6331
6332 if (fdh != NULL
6333 && fdh->fake
6334 && fdh->elf.root.type == bfd_link_hash_undefweak)
6335 {
6336 if (fh->elf.root.type == bfd_link_hash_undefined)
6337 {
6338 fdh->elf.root.type = bfd_link_hash_undefined;
6339 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6340 }
6341 else if (fh->elf.root.type == bfd_link_hash_defined
6342 || fh->elf.root.type == bfd_link_hash_defweak)
6343 {
6344 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6345 }
6346 }
6347
6348 if (fdh != NULL
6349 && !fdh->elf.forced_local
6350 && (!info->executable
6351 || fdh->elf.def_dynamic
6352 || fdh->elf.ref_dynamic
6353 || (fdh->elf.root.type == bfd_link_hash_undefweak
6354 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6355 {
6356 if (fdh->elf.dynindx == -1)
6357 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6358 return FALSE;
6359 fdh->elf.ref_regular |= fh->elf.ref_regular;
6360 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6361 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6362 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6363 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6364 {
6365 move_plt_plist (fh, fdh);
6366 fdh->elf.needs_plt = 1;
6367 }
6368 fdh->is_func_descriptor = 1;
6369 fdh->oh = fh;
6370 fh->oh = fdh;
6371 }
6372
6373 /* Now that the info is on the function descriptor, clear the
6374 function code sym info. Any function code syms for which we
6375 don't have a definition in a regular file, we force local.
6376 This prevents a shared library from exporting syms that have
6377 been imported from another library. Function code syms that
6378 are really in the library we must leave global to prevent the
6379 linker dragging in a definition from a static library. */
6380 force_local = (!fh->elf.def_regular
6381 || fdh == NULL
6382 || !fdh->elf.def_regular
6383 || fdh->elf.forced_local);
6384 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6385
6386 return TRUE;
6387 }
6388
6389 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6390 this hook to a) provide some gcc support functions, and b) transfer
6391 dynamic linking information gathered so far on function code symbol
6392 entries, to their corresponding function descriptor symbol entries. */
6393
6394 static bfd_boolean
6395 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6396 struct bfd_link_info *info)
6397 {
6398 struct ppc_link_hash_table *htab;
6399 unsigned int i;
6400 const struct sfpr_def_parms funcs[] =
6401 {
6402 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6403 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6404 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6405 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6406 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6407 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6408 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6409 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6410 { "._savef", 14, 31, savefpr, savefpr1_tail },
6411 { "._restf", 14, 31, restfpr, restfpr1_tail },
6412 { "_savevr_", 20, 31, savevr, savevr_tail },
6413 { "_restvr_", 20, 31, restvr, restvr_tail }
6414 };
6415
6416 htab = ppc_hash_table (info);
6417 if (htab == NULL)
6418 return FALSE;
6419
6420 if (htab->sfpr == NULL)
6421 /* We don't have any relocs. */
6422 return TRUE;
6423
6424 /* Provide any missing _save* and _rest* functions. */
6425 htab->sfpr->size = 0;
6426 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6427 if (!sfpr_define (info, &funcs[i]))
6428 return FALSE;
6429
6430 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6431
6432 if (htab->sfpr->size == 0)
6433 htab->sfpr->flags |= SEC_EXCLUDE;
6434
6435 return TRUE;
6436 }
6437
6438 /* Adjust a symbol defined by a dynamic object and referenced by a
6439 regular object. The current definition is in some section of the
6440 dynamic object, but we're not including those sections. We have to
6441 change the definition to something the rest of the link can
6442 understand. */
6443
6444 static bfd_boolean
6445 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6446 struct elf_link_hash_entry *h)
6447 {
6448 struct ppc_link_hash_table *htab;
6449 asection *s;
6450
6451 htab = ppc_hash_table (info);
6452 if (htab == NULL)
6453 return FALSE;
6454
6455 /* Deal with function syms. */
6456 if (h->type == STT_FUNC
6457 || h->type == STT_GNU_IFUNC
6458 || h->needs_plt)
6459 {
6460 /* Clear procedure linkage table information for any symbol that
6461 won't need a .plt entry. */
6462 struct plt_entry *ent;
6463 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6464 if (ent->plt.refcount > 0)
6465 break;
6466 if (ent == NULL
6467 || (h->type != STT_GNU_IFUNC
6468 && (SYMBOL_CALLS_LOCAL (info, h)
6469 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6470 && h->root.type == bfd_link_hash_undefweak))))
6471 {
6472 h->plt.plist = NULL;
6473 h->needs_plt = 0;
6474 }
6475 }
6476 else
6477 h->plt.plist = NULL;
6478
6479 /* If this is a weak symbol, and there is a real definition, the
6480 processor independent code will have arranged for us to see the
6481 real definition first, and we can just use the same value. */
6482 if (h->u.weakdef != NULL)
6483 {
6484 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6485 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6486 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6487 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6488 if (ELIMINATE_COPY_RELOCS)
6489 h->non_got_ref = h->u.weakdef->non_got_ref;
6490 return TRUE;
6491 }
6492
6493 /* If we are creating a shared library, we must presume that the
6494 only references to the symbol are via the global offset table.
6495 For such cases we need not do anything here; the relocations will
6496 be handled correctly by relocate_section. */
6497 if (info->shared)
6498 return TRUE;
6499
6500 /* If there are no references to this symbol that do not use the
6501 GOT, we don't need to generate a copy reloc. */
6502 if (!h->non_got_ref)
6503 return TRUE;
6504
6505 /* Don't generate a copy reloc for symbols defined in the executable. */
6506 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6507 return TRUE;
6508
6509 if (ELIMINATE_COPY_RELOCS)
6510 {
6511 struct ppc_link_hash_entry * eh;
6512 struct elf_dyn_relocs *p;
6513
6514 eh = (struct ppc_link_hash_entry *) h;
6515 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6516 {
6517 s = p->sec->output_section;
6518 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6519 break;
6520 }
6521
6522 /* If we didn't find any dynamic relocs in read-only sections, then
6523 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6524 if (p == NULL)
6525 {
6526 h->non_got_ref = 0;
6527 return TRUE;
6528 }
6529 }
6530
6531 if (h->plt.plist != NULL)
6532 {
6533 /* We should never get here, but unfortunately there are versions
6534 of gcc out there that improperly (for this ABI) put initialized
6535 function pointers, vtable refs and suchlike in read-only
6536 sections. Allow them to proceed, but warn that this might
6537 break at runtime. */
6538 info->callbacks->einfo
6539 (_("%P: copy reloc against `%s' requires lazy plt linking; "
6540 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6541 h->root.root.string);
6542 }
6543
6544 /* This is a reference to a symbol defined by a dynamic object which
6545 is not a function. */
6546
6547 if (h->size == 0)
6548 {
6549 info->callbacks->einfo (_("%P: dynamic variable `%s' is zero size\n"),
6550 h->root.root.string);
6551 return TRUE;
6552 }
6553
6554 /* We must allocate the symbol in our .dynbss section, which will
6555 become part of the .bss section of the executable. There will be
6556 an entry for this symbol in the .dynsym section. The dynamic
6557 object will contain position independent code, so all references
6558 from the dynamic object to this symbol will go through the global
6559 offset table. The dynamic linker will use the .dynsym entry to
6560 determine the address it must put in the global offset table, so
6561 both the dynamic object and the regular object will refer to the
6562 same memory location for the variable. */
6563
6564 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6565 to copy the initial value out of the dynamic object and into the
6566 runtime process image. We need to remember the offset into the
6567 .rela.bss section we are going to use. */
6568 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6569 {
6570 htab->relbss->size += sizeof (Elf64_External_Rela);
6571 h->needs_copy = 1;
6572 }
6573
6574 s = htab->dynbss;
6575
6576 return _bfd_elf_adjust_dynamic_copy (h, s);
6577 }
6578
6579 /* If given a function descriptor symbol, hide both the function code
6580 sym and the descriptor. */
6581 static void
6582 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6583 struct elf_link_hash_entry *h,
6584 bfd_boolean force_local)
6585 {
6586 struct ppc_link_hash_entry *eh;
6587 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6588
6589 eh = (struct ppc_link_hash_entry *) h;
6590 if (eh->is_func_descriptor)
6591 {
6592 struct ppc_link_hash_entry *fh = eh->oh;
6593
6594 if (fh == NULL)
6595 {
6596 const char *p, *q;
6597 struct ppc_link_hash_table *htab;
6598 char save;
6599
6600 /* We aren't supposed to use alloca in BFD because on
6601 systems which do not have alloca the version in libiberty
6602 calls xmalloc, which might cause the program to crash
6603 when it runs out of memory. This function doesn't have a
6604 return status, so there's no way to gracefully return an
6605 error. So cheat. We know that string[-1] can be safely
6606 accessed; It's either a string in an ELF string table,
6607 or allocated in an objalloc structure. */
6608
6609 p = eh->elf.root.root.string - 1;
6610 save = *p;
6611 *(char *) p = '.';
6612 htab = ppc_hash_table (info);
6613 if (htab == NULL)
6614 return;
6615
6616 fh = (struct ppc_link_hash_entry *)
6617 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6618 *(char *) p = save;
6619
6620 /* Unfortunately, if it so happens that the string we were
6621 looking for was allocated immediately before this string,
6622 then we overwrote the string terminator. That's the only
6623 reason the lookup should fail. */
6624 if (fh == NULL)
6625 {
6626 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6627 while (q >= eh->elf.root.root.string && *q == *p)
6628 --q, --p;
6629 if (q < eh->elf.root.root.string && *p == '.')
6630 fh = (struct ppc_link_hash_entry *)
6631 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6632 }
6633 if (fh != NULL)
6634 {
6635 eh->oh = fh;
6636 fh->oh = eh;
6637 }
6638 }
6639 if (fh != NULL)
6640 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6641 }
6642 }
6643
6644 static bfd_boolean
6645 get_sym_h (struct elf_link_hash_entry **hp,
6646 Elf_Internal_Sym **symp,
6647 asection **symsecp,
6648 unsigned char **tls_maskp,
6649 Elf_Internal_Sym **locsymsp,
6650 unsigned long r_symndx,
6651 bfd *ibfd)
6652 {
6653 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6654
6655 if (r_symndx >= symtab_hdr->sh_info)
6656 {
6657 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6658 struct elf_link_hash_entry *h;
6659
6660 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6661 h = elf_follow_link (h);
6662
6663 if (hp != NULL)
6664 *hp = h;
6665
6666 if (symp != NULL)
6667 *symp = NULL;
6668
6669 if (symsecp != NULL)
6670 {
6671 asection *symsec = NULL;
6672 if (h->root.type == bfd_link_hash_defined
6673 || h->root.type == bfd_link_hash_defweak)
6674 symsec = h->root.u.def.section;
6675 *symsecp = symsec;
6676 }
6677
6678 if (tls_maskp != NULL)
6679 {
6680 struct ppc_link_hash_entry *eh;
6681
6682 eh = (struct ppc_link_hash_entry *) h;
6683 *tls_maskp = &eh->tls_mask;
6684 }
6685 }
6686 else
6687 {
6688 Elf_Internal_Sym *sym;
6689 Elf_Internal_Sym *locsyms = *locsymsp;
6690
6691 if (locsyms == NULL)
6692 {
6693 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6694 if (locsyms == NULL)
6695 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6696 symtab_hdr->sh_info,
6697 0, NULL, NULL, NULL);
6698 if (locsyms == NULL)
6699 return FALSE;
6700 *locsymsp = locsyms;
6701 }
6702 sym = locsyms + r_symndx;
6703
6704 if (hp != NULL)
6705 *hp = NULL;
6706
6707 if (symp != NULL)
6708 *symp = sym;
6709
6710 if (symsecp != NULL)
6711 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6712
6713 if (tls_maskp != NULL)
6714 {
6715 struct got_entry **lgot_ents;
6716 unsigned char *tls_mask;
6717
6718 tls_mask = NULL;
6719 lgot_ents = elf_local_got_ents (ibfd);
6720 if (lgot_ents != NULL)
6721 {
6722 struct plt_entry **local_plt = (struct plt_entry **)
6723 (lgot_ents + symtab_hdr->sh_info);
6724 unsigned char *lgot_masks = (unsigned char *)
6725 (local_plt + symtab_hdr->sh_info);
6726 tls_mask = &lgot_masks[r_symndx];
6727 }
6728 *tls_maskp = tls_mask;
6729 }
6730 }
6731 return TRUE;
6732 }
6733
6734 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6735 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6736 type suitable for optimization, and 1 otherwise. */
6737
6738 static int
6739 get_tls_mask (unsigned char **tls_maskp,
6740 unsigned long *toc_symndx,
6741 bfd_vma *toc_addend,
6742 Elf_Internal_Sym **locsymsp,
6743 const Elf_Internal_Rela *rel,
6744 bfd *ibfd)
6745 {
6746 unsigned long r_symndx;
6747 int next_r;
6748 struct elf_link_hash_entry *h;
6749 Elf_Internal_Sym *sym;
6750 asection *sec;
6751 bfd_vma off;
6752
6753 r_symndx = ELF64_R_SYM (rel->r_info);
6754 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6755 return 0;
6756
6757 if ((*tls_maskp != NULL && **tls_maskp != 0)
6758 || sec == NULL
6759 || ppc64_elf_section_data (sec) == NULL
6760 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6761 return 1;
6762
6763 /* Look inside a TOC section too. */
6764 if (h != NULL)
6765 {
6766 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6767 off = h->root.u.def.value;
6768 }
6769 else
6770 off = sym->st_value;
6771 off += rel->r_addend;
6772 BFD_ASSERT (off % 8 == 0);
6773 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6774 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6775 if (toc_symndx != NULL)
6776 *toc_symndx = r_symndx;
6777 if (toc_addend != NULL)
6778 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6779 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6780 return 0;
6781 if ((h == NULL || is_static_defined (h))
6782 && (next_r == -1 || next_r == -2))
6783 return 1 - next_r;
6784 return 1;
6785 }
6786
6787 /* Find (or create) an entry in the tocsave hash table. */
6788
6789 static struct tocsave_entry *
6790 tocsave_find (struct ppc_link_hash_table *htab,
6791 enum insert_option insert,
6792 Elf_Internal_Sym **local_syms,
6793 const Elf_Internal_Rela *irela,
6794 bfd *ibfd)
6795 {
6796 unsigned long r_indx;
6797 struct elf_link_hash_entry *h;
6798 Elf_Internal_Sym *sym;
6799 struct tocsave_entry ent, *p;
6800 hashval_t hash;
6801 struct tocsave_entry **slot;
6802
6803 r_indx = ELF64_R_SYM (irela->r_info);
6804 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6805 return NULL;
6806 if (ent.sec == NULL || ent.sec->output_section == NULL)
6807 {
6808 (*_bfd_error_handler)
6809 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6810 return NULL;
6811 }
6812
6813 if (h != NULL)
6814 ent.offset = h->root.u.def.value;
6815 else
6816 ent.offset = sym->st_value;
6817 ent.offset += irela->r_addend;
6818
6819 hash = tocsave_htab_hash (&ent);
6820 slot = ((struct tocsave_entry **)
6821 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6822 if (slot == NULL)
6823 return NULL;
6824
6825 if (*slot == NULL)
6826 {
6827 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6828 if (p == NULL)
6829 return NULL;
6830 *p = ent;
6831 *slot = p;
6832 }
6833 return *slot;
6834 }
6835
6836 /* Adjust all global syms defined in opd sections. In gcc generated
6837 code for the old ABI, these will already have been done. */
6838
6839 static bfd_boolean
6840 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6841 {
6842 struct ppc_link_hash_entry *eh;
6843 asection *sym_sec;
6844 struct _opd_sec_data *opd;
6845
6846 if (h->root.type == bfd_link_hash_indirect)
6847 return TRUE;
6848
6849 if (h->root.type != bfd_link_hash_defined
6850 && h->root.type != bfd_link_hash_defweak)
6851 return TRUE;
6852
6853 eh = (struct ppc_link_hash_entry *) h;
6854 if (eh->adjust_done)
6855 return TRUE;
6856
6857 sym_sec = eh->elf.root.u.def.section;
6858 opd = get_opd_info (sym_sec);
6859 if (opd != NULL && opd->adjust != NULL)
6860 {
6861 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6862 if (adjust == -1)
6863 {
6864 /* This entry has been deleted. */
6865 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6866 if (dsec == NULL)
6867 {
6868 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6869 if (elf_discarded_section (dsec))
6870 {
6871 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6872 break;
6873 }
6874 }
6875 eh->elf.root.u.def.value = 0;
6876 eh->elf.root.u.def.section = dsec;
6877 }
6878 else
6879 eh->elf.root.u.def.value += adjust;
6880 eh->adjust_done = 1;
6881 }
6882 return TRUE;
6883 }
6884
6885 /* Handles decrementing dynamic reloc counts for the reloc specified by
6886 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6887 have already been determined. */
6888
6889 static bfd_boolean
6890 dec_dynrel_count (bfd_vma r_info,
6891 asection *sec,
6892 struct bfd_link_info *info,
6893 Elf_Internal_Sym **local_syms,
6894 struct elf_link_hash_entry *h,
6895 asection *sym_sec)
6896 {
6897 enum elf_ppc64_reloc_type r_type;
6898 struct elf_dyn_relocs *p;
6899 struct elf_dyn_relocs **pp;
6900
6901 /* Can this reloc be dynamic? This switch, and later tests here
6902 should be kept in sync with the code in check_relocs. */
6903 r_type = ELF64_R_TYPE (r_info);
6904 switch (r_type)
6905 {
6906 default:
6907 return TRUE;
6908
6909 case R_PPC64_TPREL16:
6910 case R_PPC64_TPREL16_LO:
6911 case R_PPC64_TPREL16_HI:
6912 case R_PPC64_TPREL16_HA:
6913 case R_PPC64_TPREL16_DS:
6914 case R_PPC64_TPREL16_LO_DS:
6915 case R_PPC64_TPREL16_HIGHER:
6916 case R_PPC64_TPREL16_HIGHERA:
6917 case R_PPC64_TPREL16_HIGHEST:
6918 case R_PPC64_TPREL16_HIGHESTA:
6919 if (!info->shared)
6920 return TRUE;
6921
6922 case R_PPC64_TPREL64:
6923 case R_PPC64_DTPMOD64:
6924 case R_PPC64_DTPREL64:
6925 case R_PPC64_ADDR64:
6926 case R_PPC64_REL30:
6927 case R_PPC64_REL32:
6928 case R_PPC64_REL64:
6929 case R_PPC64_ADDR14:
6930 case R_PPC64_ADDR14_BRNTAKEN:
6931 case R_PPC64_ADDR14_BRTAKEN:
6932 case R_PPC64_ADDR16:
6933 case R_PPC64_ADDR16_DS:
6934 case R_PPC64_ADDR16_HA:
6935 case R_PPC64_ADDR16_HI:
6936 case R_PPC64_ADDR16_HIGHER:
6937 case R_PPC64_ADDR16_HIGHERA:
6938 case R_PPC64_ADDR16_HIGHEST:
6939 case R_PPC64_ADDR16_HIGHESTA:
6940 case R_PPC64_ADDR16_LO:
6941 case R_PPC64_ADDR16_LO_DS:
6942 case R_PPC64_ADDR24:
6943 case R_PPC64_ADDR32:
6944 case R_PPC64_UADDR16:
6945 case R_PPC64_UADDR32:
6946 case R_PPC64_UADDR64:
6947 case R_PPC64_TOC:
6948 break;
6949 }
6950
6951 if (local_syms != NULL)
6952 {
6953 unsigned long r_symndx;
6954 Elf_Internal_Sym *sym;
6955 bfd *ibfd = sec->owner;
6956
6957 r_symndx = ELF64_R_SYM (r_info);
6958 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6959 return FALSE;
6960 }
6961
6962 if ((info->shared
6963 && (must_be_dyn_reloc (info, r_type)
6964 || (h != NULL
6965 && (!info->symbolic
6966 || h->root.type == bfd_link_hash_defweak
6967 || !h->def_regular))))
6968 || (ELIMINATE_COPY_RELOCS
6969 && !info->shared
6970 && h != NULL
6971 && (h->root.type == bfd_link_hash_defweak
6972 || !h->def_regular)))
6973 ;
6974 else
6975 return TRUE;
6976
6977 if (h != NULL)
6978 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6979 else
6980 {
6981 if (sym_sec != NULL)
6982 {
6983 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6984 pp = (struct elf_dyn_relocs **) vpp;
6985 }
6986 else
6987 {
6988 void *vpp = &elf_section_data (sec)->local_dynrel;
6989 pp = (struct elf_dyn_relocs **) vpp;
6990 }
6991
6992 /* elf_gc_sweep may have already removed all dyn relocs associated
6993 with local syms for a given section. Don't report a dynreloc
6994 miscount. */
6995 if (*pp == NULL)
6996 return TRUE;
6997 }
6998
6999 while ((p = *pp) != NULL)
7000 {
7001 if (p->sec == sec)
7002 {
7003 if (!must_be_dyn_reloc (info, r_type))
7004 p->pc_count -= 1;
7005 p->count -= 1;
7006 if (p->count == 0)
7007 *pp = p->next;
7008 return TRUE;
7009 }
7010 pp = &p->next;
7011 }
7012
7013 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7014 sec->owner, sec);
7015 bfd_set_error (bfd_error_bad_value);
7016 return FALSE;
7017 }
7018
7019 /* Remove unused Official Procedure Descriptor entries. Currently we
7020 only remove those associated with functions in discarded link-once
7021 sections, or weakly defined functions that have been overridden. It
7022 would be possible to remove many more entries for statically linked
7023 applications. */
7024
7025 bfd_boolean
7026 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7027 {
7028 bfd *ibfd;
7029 bfd_boolean some_edited = FALSE;
7030 asection *need_pad = NULL;
7031
7032 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7033 {
7034 asection *sec;
7035 Elf_Internal_Rela *relstart, *rel, *relend;
7036 Elf_Internal_Shdr *symtab_hdr;
7037 Elf_Internal_Sym *local_syms;
7038 bfd_vma offset;
7039 struct _opd_sec_data *opd;
7040 bfd_boolean need_edit, add_aux_fields;
7041 bfd_size_type cnt_16b = 0;
7042
7043 if (!is_ppc64_elf (ibfd))
7044 continue;
7045
7046 sec = bfd_get_section_by_name (ibfd, ".opd");
7047 if (sec == NULL || sec->size == 0)
7048 continue;
7049
7050 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
7051 continue;
7052
7053 if (sec->output_section == bfd_abs_section_ptr)
7054 continue;
7055
7056 /* Look through the section relocs. */
7057 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7058 continue;
7059
7060 local_syms = NULL;
7061 symtab_hdr = &elf_symtab_hdr (ibfd);
7062
7063 /* Read the relocations. */
7064 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7065 info->keep_memory);
7066 if (relstart == NULL)
7067 return FALSE;
7068
7069 /* First run through the relocs to check they are sane, and to
7070 determine whether we need to edit this opd section. */
7071 need_edit = FALSE;
7072 need_pad = sec;
7073 offset = 0;
7074 relend = relstart + sec->reloc_count;
7075 for (rel = relstart; rel < relend; )
7076 {
7077 enum elf_ppc64_reloc_type r_type;
7078 unsigned long r_symndx;
7079 asection *sym_sec;
7080 struct elf_link_hash_entry *h;
7081 Elf_Internal_Sym *sym;
7082
7083 /* .opd contains a regular array of 16 or 24 byte entries. We're
7084 only interested in the reloc pointing to a function entry
7085 point. */
7086 if (rel->r_offset != offset
7087 || rel + 1 >= relend
7088 || (rel + 1)->r_offset != offset + 8)
7089 {
7090 /* If someone messes with .opd alignment then after a
7091 "ld -r" we might have padding in the middle of .opd.
7092 Also, there's nothing to prevent someone putting
7093 something silly in .opd with the assembler. No .opd
7094 optimization for them! */
7095 broken_opd:
7096 (*_bfd_error_handler)
7097 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7098 need_edit = FALSE;
7099 break;
7100 }
7101
7102 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7103 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7104 {
7105 (*_bfd_error_handler)
7106 (_("%B: unexpected reloc type %u in .opd section"),
7107 ibfd, r_type);
7108 need_edit = FALSE;
7109 break;
7110 }
7111
7112 r_symndx = ELF64_R_SYM (rel->r_info);
7113 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7114 r_symndx, ibfd))
7115 goto error_ret;
7116
7117 if (sym_sec == NULL || sym_sec->owner == NULL)
7118 {
7119 const char *sym_name;
7120 if (h != NULL)
7121 sym_name = h->root.root.string;
7122 else
7123 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7124 sym_sec);
7125
7126 (*_bfd_error_handler)
7127 (_("%B: undefined sym `%s' in .opd section"),
7128 ibfd, sym_name);
7129 need_edit = FALSE;
7130 break;
7131 }
7132
7133 /* opd entries are always for functions defined in the
7134 current input bfd. If the symbol isn't defined in the
7135 input bfd, then we won't be using the function in this
7136 bfd; It must be defined in a linkonce section in another
7137 bfd, or is weak. It's also possible that we are
7138 discarding the function due to a linker script /DISCARD/,
7139 which we test for via the output_section. */
7140 if (sym_sec->owner != ibfd
7141 || sym_sec->output_section == bfd_abs_section_ptr)
7142 need_edit = TRUE;
7143
7144 rel += 2;
7145 if (rel == relend
7146 || (rel + 1 == relend && rel->r_offset == offset + 16))
7147 {
7148 if (sec->size == offset + 24)
7149 {
7150 need_pad = NULL;
7151 break;
7152 }
7153 if (rel == relend && sec->size == offset + 16)
7154 {
7155 cnt_16b++;
7156 break;
7157 }
7158 goto broken_opd;
7159 }
7160
7161 if (rel->r_offset == offset + 24)
7162 offset += 24;
7163 else if (rel->r_offset != offset + 16)
7164 goto broken_opd;
7165 else if (rel + 1 < relend
7166 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7167 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7168 {
7169 offset += 16;
7170 cnt_16b++;
7171 }
7172 else if (rel + 2 < relend
7173 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7174 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7175 {
7176 offset += 24;
7177 rel += 1;
7178 }
7179 else
7180 goto broken_opd;
7181 }
7182
7183 add_aux_fields = non_overlapping && cnt_16b > 0;
7184
7185 if (need_edit || add_aux_fields)
7186 {
7187 Elf_Internal_Rela *write_rel;
7188 Elf_Internal_Shdr *rel_hdr;
7189 bfd_byte *rptr, *wptr;
7190 bfd_byte *new_contents;
7191 bfd_boolean skip;
7192 long opd_ent_size;
7193 bfd_size_type amt;
7194
7195 new_contents = NULL;
7196 amt = sec->size * sizeof (long) / 8;
7197 opd = &ppc64_elf_section_data (sec)->u.opd;
7198 opd->adjust = bfd_zalloc (sec->owner, amt);
7199 if (opd->adjust == NULL)
7200 return FALSE;
7201 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7202
7203 /* This seems a waste of time as input .opd sections are all
7204 zeros as generated by gcc, but I suppose there's no reason
7205 this will always be so. We might start putting something in
7206 the third word of .opd entries. */
7207 if ((sec->flags & SEC_IN_MEMORY) == 0)
7208 {
7209 bfd_byte *loc;
7210 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7211 {
7212 if (loc != NULL)
7213 free (loc);
7214 error_ret:
7215 if (local_syms != NULL
7216 && symtab_hdr->contents != (unsigned char *) local_syms)
7217 free (local_syms);
7218 if (elf_section_data (sec)->relocs != relstart)
7219 free (relstart);
7220 return FALSE;
7221 }
7222 sec->contents = loc;
7223 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7224 }
7225
7226 elf_section_data (sec)->relocs = relstart;
7227
7228 new_contents = sec->contents;
7229 if (add_aux_fields)
7230 {
7231 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7232 if (new_contents == NULL)
7233 return FALSE;
7234 need_pad = FALSE;
7235 }
7236 wptr = new_contents;
7237 rptr = sec->contents;
7238
7239 write_rel = relstart;
7240 skip = FALSE;
7241 offset = 0;
7242 opd_ent_size = 0;
7243 for (rel = relstart; rel < relend; rel++)
7244 {
7245 unsigned long r_symndx;
7246 asection *sym_sec;
7247 struct elf_link_hash_entry *h;
7248 Elf_Internal_Sym *sym;
7249
7250 r_symndx = ELF64_R_SYM (rel->r_info);
7251 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7252 r_symndx, ibfd))
7253 goto error_ret;
7254
7255 if (rel->r_offset == offset)
7256 {
7257 struct ppc_link_hash_entry *fdh = NULL;
7258
7259 /* See if the .opd entry is full 24 byte or
7260 16 byte (with fd_aux entry overlapped with next
7261 fd_func). */
7262 opd_ent_size = 24;
7263 if ((rel + 2 == relend && sec->size == offset + 16)
7264 || (rel + 3 < relend
7265 && rel[2].r_offset == offset + 16
7266 && rel[3].r_offset == offset + 24
7267 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7268 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7269 opd_ent_size = 16;
7270
7271 if (h != NULL
7272 && h->root.root.string[0] == '.')
7273 {
7274 struct ppc_link_hash_table *htab;
7275
7276 htab = ppc_hash_table (info);
7277 if (htab != NULL)
7278 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7279 htab);
7280 if (fdh != NULL
7281 && fdh->elf.root.type != bfd_link_hash_defined
7282 && fdh->elf.root.type != bfd_link_hash_defweak)
7283 fdh = NULL;
7284 }
7285
7286 skip = (sym_sec->owner != ibfd
7287 || sym_sec->output_section == bfd_abs_section_ptr);
7288 if (skip)
7289 {
7290 if (fdh != NULL && sym_sec->owner == ibfd)
7291 {
7292 /* Arrange for the function descriptor sym
7293 to be dropped. */
7294 fdh->elf.root.u.def.value = 0;
7295 fdh->elf.root.u.def.section = sym_sec;
7296 }
7297 opd->adjust[rel->r_offset / 8] = -1;
7298 }
7299 else
7300 {
7301 /* We'll be keeping this opd entry. */
7302
7303 if (fdh != NULL)
7304 {
7305 /* Redefine the function descriptor symbol to
7306 this location in the opd section. It is
7307 necessary to update the value here rather
7308 than using an array of adjustments as we do
7309 for local symbols, because various places
7310 in the generic ELF code use the value
7311 stored in u.def.value. */
7312 fdh->elf.root.u.def.value = wptr - new_contents;
7313 fdh->adjust_done = 1;
7314 }
7315
7316 /* Local syms are a bit tricky. We could
7317 tweak them as they can be cached, but
7318 we'd need to look through the local syms
7319 for the function descriptor sym which we
7320 don't have at the moment. So keep an
7321 array of adjustments. */
7322 opd->adjust[rel->r_offset / 8]
7323 = (wptr - new_contents) - (rptr - sec->contents);
7324
7325 if (wptr != rptr)
7326 memcpy (wptr, rptr, opd_ent_size);
7327 wptr += opd_ent_size;
7328 if (add_aux_fields && opd_ent_size == 16)
7329 {
7330 memset (wptr, '\0', 8);
7331 wptr += 8;
7332 }
7333 }
7334 rptr += opd_ent_size;
7335 offset += opd_ent_size;
7336 }
7337
7338 if (skip)
7339 {
7340 if (!NO_OPD_RELOCS
7341 && !info->relocatable
7342 && !dec_dynrel_count (rel->r_info, sec, info,
7343 NULL, h, sym_sec))
7344 goto error_ret;
7345 }
7346 else
7347 {
7348 /* We need to adjust any reloc offsets to point to the
7349 new opd entries. While we're at it, we may as well
7350 remove redundant relocs. */
7351 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7352 if (write_rel != rel)
7353 memcpy (write_rel, rel, sizeof (*rel));
7354 ++write_rel;
7355 }
7356 }
7357
7358 sec->size = wptr - new_contents;
7359 sec->reloc_count = write_rel - relstart;
7360 if (add_aux_fields)
7361 {
7362 free (sec->contents);
7363 sec->contents = new_contents;
7364 }
7365
7366 /* Fudge the header size too, as this is used later in
7367 elf_bfd_final_link if we are emitting relocs. */
7368 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7369 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7370 some_edited = TRUE;
7371 }
7372 else if (elf_section_data (sec)->relocs != relstart)
7373 free (relstart);
7374
7375 if (local_syms != NULL
7376 && symtab_hdr->contents != (unsigned char *) local_syms)
7377 {
7378 if (!info->keep_memory)
7379 free (local_syms);
7380 else
7381 symtab_hdr->contents = (unsigned char *) local_syms;
7382 }
7383 }
7384
7385 if (some_edited)
7386 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7387
7388 /* If we are doing a final link and the last .opd entry is just 16 byte
7389 long, add a 8 byte padding after it. */
7390 if (need_pad != NULL && !info->relocatable)
7391 {
7392 bfd_byte *p;
7393
7394 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7395 {
7396 BFD_ASSERT (need_pad->size > 0);
7397
7398 p = bfd_malloc (need_pad->size + 8);
7399 if (p == NULL)
7400 return FALSE;
7401
7402 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7403 p, 0, need_pad->size))
7404 return FALSE;
7405
7406 need_pad->contents = p;
7407 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7408 }
7409 else
7410 {
7411 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7412 if (p == NULL)
7413 return FALSE;
7414
7415 need_pad->contents = p;
7416 }
7417
7418 memset (need_pad->contents + need_pad->size, 0, 8);
7419 need_pad->size += 8;
7420 }
7421
7422 return TRUE;
7423 }
7424
7425 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7426
7427 asection *
7428 ppc64_elf_tls_setup (struct bfd_link_info *info,
7429 int no_tls_get_addr_opt,
7430 int *no_multi_toc)
7431 {
7432 struct ppc_link_hash_table *htab;
7433
7434 htab = ppc_hash_table (info);
7435 if (htab == NULL)
7436 return NULL;
7437
7438 if (*no_multi_toc)
7439 htab->do_multi_toc = 0;
7440 else if (!htab->do_multi_toc)
7441 *no_multi_toc = 1;
7442
7443 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7444 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7445 FALSE, FALSE, TRUE));
7446 /* Move dynamic linking info to the function descriptor sym. */
7447 if (htab->tls_get_addr != NULL)
7448 func_desc_adjust (&htab->tls_get_addr->elf, info);
7449 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7450 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7451 FALSE, FALSE, TRUE));
7452 if (!no_tls_get_addr_opt)
7453 {
7454 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7455
7456 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7457 FALSE, FALSE, TRUE);
7458 if (opt != NULL)
7459 func_desc_adjust (opt, info);
7460 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7461 FALSE, FALSE, TRUE);
7462 if (opt_fd != NULL
7463 && (opt_fd->root.type == bfd_link_hash_defined
7464 || opt_fd->root.type == bfd_link_hash_defweak))
7465 {
7466 /* If glibc supports an optimized __tls_get_addr call stub,
7467 signalled by the presence of __tls_get_addr_opt, and we'll
7468 be calling __tls_get_addr via a plt call stub, then
7469 make __tls_get_addr point to __tls_get_addr_opt. */
7470 tga_fd = &htab->tls_get_addr_fd->elf;
7471 if (htab->elf.dynamic_sections_created
7472 && tga_fd != NULL
7473 && (tga_fd->type == STT_FUNC
7474 || tga_fd->needs_plt)
7475 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7476 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7477 && tga_fd->root.type == bfd_link_hash_undefweak)))
7478 {
7479 struct plt_entry *ent;
7480
7481 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7482 if (ent->plt.refcount > 0)
7483 break;
7484 if (ent != NULL)
7485 {
7486 tga_fd->root.type = bfd_link_hash_indirect;
7487 tga_fd->root.u.i.link = &opt_fd->root;
7488 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7489 if (opt_fd->dynindx != -1)
7490 {
7491 /* Use __tls_get_addr_opt in dynamic relocations. */
7492 opt_fd->dynindx = -1;
7493 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7494 opt_fd->dynstr_index);
7495 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7496 return NULL;
7497 }
7498 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7499 tga = &htab->tls_get_addr->elf;
7500 if (opt != NULL && tga != NULL)
7501 {
7502 tga->root.type = bfd_link_hash_indirect;
7503 tga->root.u.i.link = &opt->root;
7504 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7505 _bfd_elf_link_hash_hide_symbol (info, opt,
7506 tga->forced_local);
7507 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7508 }
7509 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7510 htab->tls_get_addr_fd->is_func_descriptor = 1;
7511 if (htab->tls_get_addr != NULL)
7512 {
7513 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7514 htab->tls_get_addr->is_func = 1;
7515 }
7516 }
7517 }
7518 }
7519 else
7520 no_tls_get_addr_opt = TRUE;
7521 }
7522 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7523 return _bfd_elf_tls_setup (info->output_bfd, info);
7524 }
7525
7526 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7527 HASH1 or HASH2. */
7528
7529 static bfd_boolean
7530 branch_reloc_hash_match (const bfd *ibfd,
7531 const Elf_Internal_Rela *rel,
7532 const struct ppc_link_hash_entry *hash1,
7533 const struct ppc_link_hash_entry *hash2)
7534 {
7535 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7536 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7537 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7538
7539 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7540 {
7541 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7542 struct elf_link_hash_entry *h;
7543
7544 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7545 h = elf_follow_link (h);
7546 if (h == &hash1->elf || h == &hash2->elf)
7547 return TRUE;
7548 }
7549 return FALSE;
7550 }
7551
7552 /* Run through all the TLS relocs looking for optimization
7553 opportunities. The linker has been hacked (see ppc64elf.em) to do
7554 a preliminary section layout so that we know the TLS segment
7555 offsets. We can't optimize earlier because some optimizations need
7556 to know the tp offset, and we need to optimize before allocating
7557 dynamic relocations. */
7558
7559 bfd_boolean
7560 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7561 {
7562 bfd *ibfd;
7563 asection *sec;
7564 struct ppc_link_hash_table *htab;
7565 unsigned char *toc_ref;
7566 int pass;
7567
7568 if (info->relocatable || !info->executable)
7569 return TRUE;
7570
7571 htab = ppc_hash_table (info);
7572 if (htab == NULL)
7573 return FALSE;
7574
7575 /* Make two passes over the relocs. On the first pass, mark toc
7576 entries involved with tls relocs, and check that tls relocs
7577 involved in setting up a tls_get_addr call are indeed followed by
7578 such a call. If they are not, we can't do any tls optimization.
7579 On the second pass twiddle tls_mask flags to notify
7580 relocate_section that optimization can be done, and adjust got
7581 and plt refcounts. */
7582 toc_ref = NULL;
7583 for (pass = 0; pass < 2; ++pass)
7584 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7585 {
7586 Elf_Internal_Sym *locsyms = NULL;
7587 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7588
7589 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7590 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7591 {
7592 Elf_Internal_Rela *relstart, *rel, *relend;
7593 bfd_boolean found_tls_get_addr_arg = 0;
7594
7595 /* Read the relocations. */
7596 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7597 info->keep_memory);
7598 if (relstart == NULL)
7599 return FALSE;
7600
7601 relend = relstart + sec->reloc_count;
7602 for (rel = relstart; rel < relend; rel++)
7603 {
7604 enum elf_ppc64_reloc_type r_type;
7605 unsigned long r_symndx;
7606 struct elf_link_hash_entry *h;
7607 Elf_Internal_Sym *sym;
7608 asection *sym_sec;
7609 unsigned char *tls_mask;
7610 unsigned char tls_set, tls_clear, tls_type = 0;
7611 bfd_vma value;
7612 bfd_boolean ok_tprel, is_local;
7613 long toc_ref_index = 0;
7614 int expecting_tls_get_addr = 0;
7615 bfd_boolean ret = FALSE;
7616
7617 r_symndx = ELF64_R_SYM (rel->r_info);
7618 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7619 r_symndx, ibfd))
7620 {
7621 err_free_rel:
7622 if (elf_section_data (sec)->relocs != relstart)
7623 free (relstart);
7624 if (toc_ref != NULL)
7625 free (toc_ref);
7626 if (locsyms != NULL
7627 && (elf_symtab_hdr (ibfd).contents
7628 != (unsigned char *) locsyms))
7629 free (locsyms);
7630 return ret;
7631 }
7632
7633 if (h != NULL)
7634 {
7635 if (h->root.type == bfd_link_hash_defined
7636 || h->root.type == bfd_link_hash_defweak)
7637 value = h->root.u.def.value;
7638 else if (h->root.type == bfd_link_hash_undefweak)
7639 value = 0;
7640 else
7641 {
7642 found_tls_get_addr_arg = 0;
7643 continue;
7644 }
7645 }
7646 else
7647 /* Symbols referenced by TLS relocs must be of type
7648 STT_TLS. So no need for .opd local sym adjust. */
7649 value = sym->st_value;
7650
7651 ok_tprel = FALSE;
7652 is_local = FALSE;
7653 if (h == NULL
7654 || !h->def_dynamic)
7655 {
7656 is_local = TRUE;
7657 if (h != NULL
7658 && h->root.type == bfd_link_hash_undefweak)
7659 ok_tprel = TRUE;
7660 else
7661 {
7662 value += sym_sec->output_offset;
7663 value += sym_sec->output_section->vma;
7664 value -= htab->elf.tls_sec->vma;
7665 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7666 < (bfd_vma) 1 << 32);
7667 }
7668 }
7669
7670 r_type = ELF64_R_TYPE (rel->r_info);
7671 /* If this section has old-style __tls_get_addr calls
7672 without marker relocs, then check that each
7673 __tls_get_addr call reloc is preceded by a reloc
7674 that conceivably belongs to the __tls_get_addr arg
7675 setup insn. If we don't find matching arg setup
7676 relocs, don't do any tls optimization. */
7677 if (pass == 0
7678 && sec->has_tls_get_addr_call
7679 && h != NULL
7680 && (h == &htab->tls_get_addr->elf
7681 || h == &htab->tls_get_addr_fd->elf)
7682 && !found_tls_get_addr_arg
7683 && is_branch_reloc (r_type))
7684 {
7685 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7686 "TLS optimization disabled\n"),
7687 ibfd, sec, rel->r_offset);
7688 ret = TRUE;
7689 goto err_free_rel;
7690 }
7691
7692 found_tls_get_addr_arg = 0;
7693 switch (r_type)
7694 {
7695 case R_PPC64_GOT_TLSLD16:
7696 case R_PPC64_GOT_TLSLD16_LO:
7697 expecting_tls_get_addr = 1;
7698 found_tls_get_addr_arg = 1;
7699 /* Fall thru */
7700
7701 case R_PPC64_GOT_TLSLD16_HI:
7702 case R_PPC64_GOT_TLSLD16_HA:
7703 /* These relocs should never be against a symbol
7704 defined in a shared lib. Leave them alone if
7705 that turns out to be the case. */
7706 if (!is_local)
7707 continue;
7708
7709 /* LD -> LE */
7710 tls_set = 0;
7711 tls_clear = TLS_LD;
7712 tls_type = TLS_TLS | TLS_LD;
7713 break;
7714
7715 case R_PPC64_GOT_TLSGD16:
7716 case R_PPC64_GOT_TLSGD16_LO:
7717 expecting_tls_get_addr = 1;
7718 found_tls_get_addr_arg = 1;
7719 /* Fall thru */
7720
7721 case R_PPC64_GOT_TLSGD16_HI:
7722 case R_PPC64_GOT_TLSGD16_HA:
7723 if (ok_tprel)
7724 /* GD -> LE */
7725 tls_set = 0;
7726 else
7727 /* GD -> IE */
7728 tls_set = TLS_TLS | TLS_TPRELGD;
7729 tls_clear = TLS_GD;
7730 tls_type = TLS_TLS | TLS_GD;
7731 break;
7732
7733 case R_PPC64_GOT_TPREL16_DS:
7734 case R_PPC64_GOT_TPREL16_LO_DS:
7735 case R_PPC64_GOT_TPREL16_HI:
7736 case R_PPC64_GOT_TPREL16_HA:
7737 if (ok_tprel)
7738 {
7739 /* IE -> LE */
7740 tls_set = 0;
7741 tls_clear = TLS_TPREL;
7742 tls_type = TLS_TLS | TLS_TPREL;
7743 break;
7744 }
7745 continue;
7746
7747 case R_PPC64_TLSGD:
7748 case R_PPC64_TLSLD:
7749 found_tls_get_addr_arg = 1;
7750 /* Fall thru */
7751
7752 case R_PPC64_TLS:
7753 case R_PPC64_TOC16:
7754 case R_PPC64_TOC16_LO:
7755 if (sym_sec == NULL || sym_sec != toc)
7756 continue;
7757
7758 /* Mark this toc entry as referenced by a TLS
7759 code sequence. We can do that now in the
7760 case of R_PPC64_TLS, and after checking for
7761 tls_get_addr for the TOC16 relocs. */
7762 if (toc_ref == NULL)
7763 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7764 if (toc_ref == NULL)
7765 goto err_free_rel;
7766
7767 if (h != NULL)
7768 value = h->root.u.def.value;
7769 else
7770 value = sym->st_value;
7771 value += rel->r_addend;
7772 BFD_ASSERT (value < toc->size && value % 8 == 0);
7773 toc_ref_index = (value + toc->output_offset) / 8;
7774 if (r_type == R_PPC64_TLS
7775 || r_type == R_PPC64_TLSGD
7776 || r_type == R_PPC64_TLSLD)
7777 {
7778 toc_ref[toc_ref_index] = 1;
7779 continue;
7780 }
7781
7782 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7783 continue;
7784
7785 tls_set = 0;
7786 tls_clear = 0;
7787 expecting_tls_get_addr = 2;
7788 break;
7789
7790 case R_PPC64_TPREL64:
7791 if (pass == 0
7792 || sec != toc
7793 || toc_ref == NULL
7794 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7795 continue;
7796 if (ok_tprel)
7797 {
7798 /* IE -> LE */
7799 tls_set = TLS_EXPLICIT;
7800 tls_clear = TLS_TPREL;
7801 break;
7802 }
7803 continue;
7804
7805 case R_PPC64_DTPMOD64:
7806 if (pass == 0
7807 || sec != toc
7808 || toc_ref == NULL
7809 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7810 continue;
7811 if (rel + 1 < relend
7812 && (rel[1].r_info
7813 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7814 && rel[1].r_offset == rel->r_offset + 8)
7815 {
7816 if (ok_tprel)
7817 /* GD -> LE */
7818 tls_set = TLS_EXPLICIT | TLS_GD;
7819 else
7820 /* GD -> IE */
7821 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7822 tls_clear = TLS_GD;
7823 }
7824 else
7825 {
7826 if (!is_local)
7827 continue;
7828
7829 /* LD -> LE */
7830 tls_set = TLS_EXPLICIT;
7831 tls_clear = TLS_LD;
7832 }
7833 break;
7834
7835 default:
7836 continue;
7837 }
7838
7839 if (pass == 0)
7840 {
7841 if (!expecting_tls_get_addr
7842 || !sec->has_tls_get_addr_call)
7843 continue;
7844
7845 if (rel + 1 < relend
7846 && branch_reloc_hash_match (ibfd, rel + 1,
7847 htab->tls_get_addr,
7848 htab->tls_get_addr_fd))
7849 {
7850 if (expecting_tls_get_addr == 2)
7851 {
7852 /* Check for toc tls entries. */
7853 unsigned char *toc_tls;
7854 int retval;
7855
7856 retval = get_tls_mask (&toc_tls, NULL, NULL,
7857 &locsyms,
7858 rel, ibfd);
7859 if (retval == 0)
7860 goto err_free_rel;
7861 if (toc_tls != NULL)
7862 {
7863 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
7864 found_tls_get_addr_arg = 1;
7865 if (retval > 1)
7866 toc_ref[toc_ref_index] = 1;
7867 }
7868 }
7869 continue;
7870 }
7871
7872 if (expecting_tls_get_addr != 1)
7873 continue;
7874
7875 /* Uh oh, we didn't find the expected call. We
7876 could just mark this symbol to exclude it
7877 from tls optimization but it's safer to skip
7878 the entire optimization. */
7879 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
7880 "TLS optimization disabled\n"),
7881 ibfd, sec, rel->r_offset);
7882 ret = TRUE;
7883 goto err_free_rel;
7884 }
7885
7886 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7887 {
7888 struct plt_entry *ent;
7889 for (ent = htab->tls_get_addr->elf.plt.plist;
7890 ent != NULL;
7891 ent = ent->next)
7892 if (ent->addend == 0)
7893 {
7894 if (ent->plt.refcount > 0)
7895 {
7896 ent->plt.refcount -= 1;
7897 expecting_tls_get_addr = 0;
7898 }
7899 break;
7900 }
7901 }
7902
7903 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7904 {
7905 struct plt_entry *ent;
7906 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7907 ent != NULL;
7908 ent = ent->next)
7909 if (ent->addend == 0)
7910 {
7911 if (ent->plt.refcount > 0)
7912 ent->plt.refcount -= 1;
7913 break;
7914 }
7915 }
7916
7917 if (tls_clear == 0)
7918 continue;
7919
7920 if ((tls_set & TLS_EXPLICIT) == 0)
7921 {
7922 struct got_entry *ent;
7923
7924 /* Adjust got entry for this reloc. */
7925 if (h != NULL)
7926 ent = h->got.glist;
7927 else
7928 ent = elf_local_got_ents (ibfd)[r_symndx];
7929
7930 for (; ent != NULL; ent = ent->next)
7931 if (ent->addend == rel->r_addend
7932 && ent->owner == ibfd
7933 && ent->tls_type == tls_type)
7934 break;
7935 if (ent == NULL)
7936 abort ();
7937
7938 if (tls_set == 0)
7939 {
7940 /* We managed to get rid of a got entry. */
7941 if (ent->got.refcount > 0)
7942 ent->got.refcount -= 1;
7943 }
7944 }
7945 else
7946 {
7947 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7948 we'll lose one or two dyn relocs. */
7949 if (!dec_dynrel_count (rel->r_info, sec, info,
7950 NULL, h, sym_sec))
7951 return FALSE;
7952
7953 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7954 {
7955 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7956 NULL, h, sym_sec))
7957 return FALSE;
7958 }
7959 }
7960
7961 *tls_mask |= tls_set;
7962 *tls_mask &= ~tls_clear;
7963 }
7964
7965 if (elf_section_data (sec)->relocs != relstart)
7966 free (relstart);
7967 }
7968
7969 if (locsyms != NULL
7970 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7971 {
7972 if (!info->keep_memory)
7973 free (locsyms);
7974 else
7975 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7976 }
7977 }
7978
7979 if (toc_ref != NULL)
7980 free (toc_ref);
7981 return TRUE;
7982 }
7983
7984 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7985 the values of any global symbols in a toc section that has been
7986 edited. Globals in toc sections should be a rarity, so this function
7987 sets a flag if any are found in toc sections other than the one just
7988 edited, so that futher hash table traversals can be avoided. */
7989
7990 struct adjust_toc_info
7991 {
7992 asection *toc;
7993 unsigned long *skip;
7994 bfd_boolean global_toc_syms;
7995 };
7996
7997 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7998
7999 static bfd_boolean
8000 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8001 {
8002 struct ppc_link_hash_entry *eh;
8003 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8004 unsigned long i;
8005
8006 if (h->root.type != bfd_link_hash_defined
8007 && h->root.type != bfd_link_hash_defweak)
8008 return TRUE;
8009
8010 eh = (struct ppc_link_hash_entry *) h;
8011 if (eh->adjust_done)
8012 return TRUE;
8013
8014 if (eh->elf.root.u.def.section == toc_inf->toc)
8015 {
8016 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8017 i = toc_inf->toc->rawsize >> 3;
8018 else
8019 i = eh->elf.root.u.def.value >> 3;
8020
8021 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8022 {
8023 (*_bfd_error_handler)
8024 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8025 do
8026 ++i;
8027 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8028 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8029 }
8030
8031 eh->elf.root.u.def.value -= toc_inf->skip[i];
8032 eh->adjust_done = 1;
8033 }
8034 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8035 toc_inf->global_toc_syms = TRUE;
8036
8037 return TRUE;
8038 }
8039
8040 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8041
8042 static bfd_boolean
8043 ok_lo_toc_insn (unsigned int insn)
8044 {
8045 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8046 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8047 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8048 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8049 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8050 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8051 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8052 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8053 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8054 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8055 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8056 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8057 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8058 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8059 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8060 && (insn & 3) != 1)
8061 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8062 && ((insn & 3) == 0 || (insn & 3) == 3))
8063 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8064 }
8065
8066 /* Examine all relocs referencing .toc sections in order to remove
8067 unused .toc entries. */
8068
8069 bfd_boolean
8070 ppc64_elf_edit_toc (struct bfd_link_info *info)
8071 {
8072 bfd *ibfd;
8073 struct adjust_toc_info toc_inf;
8074 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8075
8076 htab->do_toc_opt = 1;
8077 toc_inf.global_toc_syms = TRUE;
8078 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8079 {
8080 asection *toc, *sec;
8081 Elf_Internal_Shdr *symtab_hdr;
8082 Elf_Internal_Sym *local_syms;
8083 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8084 unsigned long *skip, *drop;
8085 unsigned char *used;
8086 unsigned char *keep, last, some_unused;
8087
8088 if (!is_ppc64_elf (ibfd))
8089 continue;
8090
8091 toc = bfd_get_section_by_name (ibfd, ".toc");
8092 if (toc == NULL
8093 || toc->size == 0
8094 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
8095 || elf_discarded_section (toc))
8096 continue;
8097
8098 toc_relocs = NULL;
8099 local_syms = NULL;
8100 symtab_hdr = &elf_symtab_hdr (ibfd);
8101
8102 /* Look at sections dropped from the final link. */
8103 skip = NULL;
8104 relstart = NULL;
8105 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8106 {
8107 if (sec->reloc_count == 0
8108 || !elf_discarded_section (sec)
8109 || get_opd_info (sec)
8110 || (sec->flags & SEC_ALLOC) == 0
8111 || (sec->flags & SEC_DEBUGGING) != 0)
8112 continue;
8113
8114 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8115 if (relstart == NULL)
8116 goto error_ret;
8117
8118 /* Run through the relocs to see which toc entries might be
8119 unused. */
8120 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8121 {
8122 enum elf_ppc64_reloc_type r_type;
8123 unsigned long r_symndx;
8124 asection *sym_sec;
8125 struct elf_link_hash_entry *h;
8126 Elf_Internal_Sym *sym;
8127 bfd_vma val;
8128
8129 r_type = ELF64_R_TYPE (rel->r_info);
8130 switch (r_type)
8131 {
8132 default:
8133 continue;
8134
8135 case R_PPC64_TOC16:
8136 case R_PPC64_TOC16_LO:
8137 case R_PPC64_TOC16_HI:
8138 case R_PPC64_TOC16_HA:
8139 case R_PPC64_TOC16_DS:
8140 case R_PPC64_TOC16_LO_DS:
8141 break;
8142 }
8143
8144 r_symndx = ELF64_R_SYM (rel->r_info);
8145 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8146 r_symndx, ibfd))
8147 goto error_ret;
8148
8149 if (sym_sec != toc)
8150 continue;
8151
8152 if (h != NULL)
8153 val = h->root.u.def.value;
8154 else
8155 val = sym->st_value;
8156 val += rel->r_addend;
8157
8158 if (val >= toc->size)
8159 continue;
8160
8161 /* Anything in the toc ought to be aligned to 8 bytes.
8162 If not, don't mark as unused. */
8163 if (val & 7)
8164 continue;
8165
8166 if (skip == NULL)
8167 {
8168 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8169 if (skip == NULL)
8170 goto error_ret;
8171 }
8172
8173 skip[val >> 3] = ref_from_discarded;
8174 }
8175
8176 if (elf_section_data (sec)->relocs != relstart)
8177 free (relstart);
8178 }
8179
8180 /* For largetoc loads of address constants, we can convert
8181 . addis rx,2,addr@got@ha
8182 . ld ry,addr@got@l(rx)
8183 to
8184 . addis rx,2,addr@toc@ha
8185 . addi ry,rx,addr@toc@l
8186 when addr is within 2G of the toc pointer. This then means
8187 that the word storing "addr" in the toc is no longer needed. */
8188
8189 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8190 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8191 && toc->reloc_count != 0)
8192 {
8193 /* Read toc relocs. */
8194 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8195 info->keep_memory);
8196 if (toc_relocs == NULL)
8197 goto error_ret;
8198
8199 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8200 {
8201 enum elf_ppc64_reloc_type r_type;
8202 unsigned long r_symndx;
8203 asection *sym_sec;
8204 struct elf_link_hash_entry *h;
8205 Elf_Internal_Sym *sym;
8206 bfd_vma val, addr;
8207
8208 r_type = ELF64_R_TYPE (rel->r_info);
8209 if (r_type != R_PPC64_ADDR64)
8210 continue;
8211
8212 r_symndx = ELF64_R_SYM (rel->r_info);
8213 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8214 r_symndx, ibfd))
8215 goto error_ret;
8216
8217 if (sym_sec == NULL
8218 || elf_discarded_section (sym_sec))
8219 continue;
8220
8221 if (!SYMBOL_CALLS_LOCAL (info, h))
8222 continue;
8223
8224 if (h != NULL)
8225 {
8226 if (h->type == STT_GNU_IFUNC)
8227 continue;
8228 val = h->root.u.def.value;
8229 }
8230 else
8231 {
8232 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8233 continue;
8234 val = sym->st_value;
8235 }
8236 val += rel->r_addend;
8237 val += sym_sec->output_section->vma + sym_sec->output_offset;
8238
8239 /* We don't yet know the exact toc pointer value, but we
8240 know it will be somewhere in the toc section. Don't
8241 optimize if the difference from any possible toc
8242 pointer is outside [ff..f80008000, 7fff7fff]. */
8243 addr = toc->output_section->vma + TOC_BASE_OFF;
8244 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8245 continue;
8246
8247 addr = toc->output_section->vma + toc->output_section->rawsize;
8248 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8249 continue;
8250
8251 if (skip == NULL)
8252 {
8253 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8254 if (skip == NULL)
8255 goto error_ret;
8256 }
8257
8258 skip[rel->r_offset >> 3]
8259 |= can_optimize | ((rel - toc_relocs) << 2);
8260 }
8261 }
8262
8263 if (skip == NULL)
8264 continue;
8265
8266 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8267 if (used == NULL)
8268 {
8269 error_ret:
8270 if (local_syms != NULL
8271 && symtab_hdr->contents != (unsigned char *) local_syms)
8272 free (local_syms);
8273 if (sec != NULL
8274 && relstart != NULL
8275 && elf_section_data (sec)->relocs != relstart)
8276 free (relstart);
8277 if (toc_relocs != NULL
8278 && elf_section_data (toc)->relocs != toc_relocs)
8279 free (toc_relocs);
8280 if (skip != NULL)
8281 free (skip);
8282 return FALSE;
8283 }
8284
8285 /* Now check all kept sections that might reference the toc.
8286 Check the toc itself last. */
8287 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8288 : ibfd->sections);
8289 sec != NULL;
8290 sec = (sec == toc ? NULL
8291 : sec->next == NULL ? toc
8292 : sec->next == toc && toc->next ? toc->next
8293 : sec->next))
8294 {
8295 int repeat;
8296
8297 if (sec->reloc_count == 0
8298 || elf_discarded_section (sec)
8299 || get_opd_info (sec)
8300 || (sec->flags & SEC_ALLOC) == 0
8301 || (sec->flags & SEC_DEBUGGING) != 0)
8302 continue;
8303
8304 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8305 info->keep_memory);
8306 if (relstart == NULL)
8307 goto error_ret;
8308
8309 /* Mark toc entries referenced as used. */
8310 repeat = 0;
8311 do
8312 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8313 {
8314 enum elf_ppc64_reloc_type r_type;
8315 unsigned long r_symndx;
8316 asection *sym_sec;
8317 struct elf_link_hash_entry *h;
8318 Elf_Internal_Sym *sym;
8319 bfd_vma val;
8320 enum {no_check, check_lo, check_ha} insn_check;
8321
8322 r_type = ELF64_R_TYPE (rel->r_info);
8323 switch (r_type)
8324 {
8325 default:
8326 insn_check = no_check;
8327 break;
8328
8329 case R_PPC64_GOT_TLSLD16_HA:
8330 case R_PPC64_GOT_TLSGD16_HA:
8331 case R_PPC64_GOT_TPREL16_HA:
8332 case R_PPC64_GOT_DTPREL16_HA:
8333 case R_PPC64_GOT16_HA:
8334 case R_PPC64_TOC16_HA:
8335 insn_check = check_ha;
8336 break;
8337
8338 case R_PPC64_GOT_TLSLD16_LO:
8339 case R_PPC64_GOT_TLSGD16_LO:
8340 case R_PPC64_GOT_TPREL16_LO_DS:
8341 case R_PPC64_GOT_DTPREL16_LO_DS:
8342 case R_PPC64_GOT16_LO:
8343 case R_PPC64_GOT16_LO_DS:
8344 case R_PPC64_TOC16_LO:
8345 case R_PPC64_TOC16_LO_DS:
8346 insn_check = check_lo;
8347 break;
8348 }
8349
8350 if (insn_check != no_check)
8351 {
8352 bfd_vma off = rel->r_offset & ~3;
8353 unsigned char buf[4];
8354 unsigned int insn;
8355
8356 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8357 {
8358 free (used);
8359 goto error_ret;
8360 }
8361 insn = bfd_get_32 (ibfd, buf);
8362 if (insn_check == check_lo
8363 ? !ok_lo_toc_insn (insn)
8364 : ((insn & ((0x3f << 26) | 0x1f << 16))
8365 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8366 {
8367 char str[12];
8368
8369 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8370 sprintf (str, "%#08x", insn);
8371 info->callbacks->einfo
8372 (_("%P: %H: toc optimization is not supported for"
8373 " %s instruction.\n"),
8374 ibfd, sec, rel->r_offset & ~3, str);
8375 }
8376 }
8377
8378 switch (r_type)
8379 {
8380 case R_PPC64_TOC16:
8381 case R_PPC64_TOC16_LO:
8382 case R_PPC64_TOC16_HI:
8383 case R_PPC64_TOC16_HA:
8384 case R_PPC64_TOC16_DS:
8385 case R_PPC64_TOC16_LO_DS:
8386 /* In case we're taking addresses of toc entries. */
8387 case R_PPC64_ADDR64:
8388 break;
8389
8390 default:
8391 continue;
8392 }
8393
8394 r_symndx = ELF64_R_SYM (rel->r_info);
8395 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8396 r_symndx, ibfd))
8397 {
8398 free (used);
8399 goto error_ret;
8400 }
8401
8402 if (sym_sec != toc)
8403 continue;
8404
8405 if (h != NULL)
8406 val = h->root.u.def.value;
8407 else
8408 val = sym->st_value;
8409 val += rel->r_addend;
8410
8411 if (val >= toc->size)
8412 continue;
8413
8414 if ((skip[val >> 3] & can_optimize) != 0)
8415 {
8416 bfd_vma off;
8417 unsigned char opc;
8418
8419 switch (r_type)
8420 {
8421 case R_PPC64_TOC16_HA:
8422 break;
8423
8424 case R_PPC64_TOC16_LO_DS:
8425 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8426 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8427 {
8428 free (used);
8429 goto error_ret;
8430 }
8431 if ((opc & (0x3f << 2)) == (58u << 2))
8432 break;
8433 /* Fall thru */
8434
8435 default:
8436 /* Wrong sort of reloc, or not a ld. We may
8437 as well clear ref_from_discarded too. */
8438 skip[val >> 3] = 0;
8439 }
8440 }
8441
8442 /* For the toc section, we only mark as used if
8443 this entry itself isn't unused. */
8444 if (sec == toc
8445 && !used[val >> 3]
8446 && (used[rel->r_offset >> 3]
8447 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8448 /* Do all the relocs again, to catch reference
8449 chains. */
8450 repeat = 1;
8451
8452 used[val >> 3] = 1;
8453 }
8454 while (repeat);
8455
8456 if (elf_section_data (sec)->relocs != relstart)
8457 free (relstart);
8458 }
8459
8460 /* Merge the used and skip arrays. Assume that TOC
8461 doublewords not appearing as either used or unused belong
8462 to to an entry more than one doubleword in size. */
8463 for (drop = skip, keep = used, last = 0, some_unused = 0;
8464 drop < skip + (toc->size + 7) / 8;
8465 ++drop, ++keep)
8466 {
8467 if (*keep)
8468 {
8469 *drop &= ~ref_from_discarded;
8470 if ((*drop & can_optimize) != 0)
8471 some_unused = 1;
8472 last = 0;
8473 }
8474 else if ((*drop & ref_from_discarded) != 0)
8475 {
8476 some_unused = 1;
8477 last = ref_from_discarded;
8478 }
8479 else
8480 *drop = last;
8481 }
8482
8483 free (used);
8484
8485 if (some_unused)
8486 {
8487 bfd_byte *contents, *src;
8488 unsigned long off;
8489 Elf_Internal_Sym *sym;
8490 bfd_boolean local_toc_syms = FALSE;
8491
8492 /* Shuffle the toc contents, and at the same time convert the
8493 skip array from booleans into offsets. */
8494 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8495 goto error_ret;
8496
8497 elf_section_data (toc)->this_hdr.contents = contents;
8498
8499 for (src = contents, off = 0, drop = skip;
8500 src < contents + toc->size;
8501 src += 8, ++drop)
8502 {
8503 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8504 off += 8;
8505 else if (off != 0)
8506 {
8507 *drop = off;
8508 memcpy (src - off, src, 8);
8509 }
8510 }
8511 *drop = off;
8512 toc->rawsize = toc->size;
8513 toc->size = src - contents - off;
8514
8515 /* Adjust addends for relocs against the toc section sym,
8516 and optimize any accesses we can. */
8517 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8518 {
8519 if (sec->reloc_count == 0
8520 || elf_discarded_section (sec))
8521 continue;
8522
8523 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8524 info->keep_memory);
8525 if (relstart == NULL)
8526 goto error_ret;
8527
8528 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8529 {
8530 enum elf_ppc64_reloc_type r_type;
8531 unsigned long r_symndx;
8532 asection *sym_sec;
8533 struct elf_link_hash_entry *h;
8534 bfd_vma val;
8535
8536 r_type = ELF64_R_TYPE (rel->r_info);
8537 switch (r_type)
8538 {
8539 default:
8540 continue;
8541
8542 case R_PPC64_TOC16:
8543 case R_PPC64_TOC16_LO:
8544 case R_PPC64_TOC16_HI:
8545 case R_PPC64_TOC16_HA:
8546 case R_PPC64_TOC16_DS:
8547 case R_PPC64_TOC16_LO_DS:
8548 case R_PPC64_ADDR64:
8549 break;
8550 }
8551
8552 r_symndx = ELF64_R_SYM (rel->r_info);
8553 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8554 r_symndx, ibfd))
8555 goto error_ret;
8556
8557 if (sym_sec != toc)
8558 continue;
8559
8560 if (h != NULL)
8561 val = h->root.u.def.value;
8562 else
8563 {
8564 val = sym->st_value;
8565 if (val != 0)
8566 local_toc_syms = TRUE;
8567 }
8568
8569 val += rel->r_addend;
8570
8571 if (val > toc->rawsize)
8572 val = toc->rawsize;
8573 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8574 continue;
8575 else if ((skip[val >> 3] & can_optimize) != 0)
8576 {
8577 Elf_Internal_Rela *tocrel
8578 = toc_relocs + (skip[val >> 3] >> 2);
8579 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8580
8581 switch (r_type)
8582 {
8583 case R_PPC64_TOC16_HA:
8584 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8585 break;
8586
8587 case R_PPC64_TOC16_LO_DS:
8588 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8589 break;
8590
8591 default:
8592 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8593 ppc_howto_init ();
8594 info->callbacks->einfo
8595 (_("%P: %H: %s relocation references "
8596 "optimized away TOC entry\n"),
8597 ibfd, sec, rel->r_offset,
8598 ppc64_elf_howto_table[r_type]->name);
8599 bfd_set_error (bfd_error_bad_value);
8600 goto error_ret;
8601 }
8602 rel->r_addend = tocrel->r_addend;
8603 elf_section_data (sec)->relocs = relstart;
8604 continue;
8605 }
8606
8607 if (h != NULL || sym->st_value != 0)
8608 continue;
8609
8610 rel->r_addend -= skip[val >> 3];
8611 elf_section_data (sec)->relocs = relstart;
8612 }
8613
8614 if (elf_section_data (sec)->relocs != relstart)
8615 free (relstart);
8616 }
8617
8618 /* We shouldn't have local or global symbols defined in the TOC,
8619 but handle them anyway. */
8620 if (local_syms != NULL)
8621 for (sym = local_syms;
8622 sym < local_syms + symtab_hdr->sh_info;
8623 ++sym)
8624 if (sym->st_value != 0
8625 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8626 {
8627 unsigned long i;
8628
8629 if (sym->st_value > toc->rawsize)
8630 i = toc->rawsize >> 3;
8631 else
8632 i = sym->st_value >> 3;
8633
8634 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8635 {
8636 if (local_toc_syms)
8637 (*_bfd_error_handler)
8638 (_("%s defined on removed toc entry"),
8639 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8640 do
8641 ++i;
8642 while ((skip[i] & (ref_from_discarded | can_optimize)));
8643 sym->st_value = (bfd_vma) i << 3;
8644 }
8645
8646 sym->st_value -= skip[i];
8647 symtab_hdr->contents = (unsigned char *) local_syms;
8648 }
8649
8650 /* Adjust any global syms defined in this toc input section. */
8651 if (toc_inf.global_toc_syms)
8652 {
8653 toc_inf.toc = toc;
8654 toc_inf.skip = skip;
8655 toc_inf.global_toc_syms = FALSE;
8656 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8657 &toc_inf);
8658 }
8659
8660 if (toc->reloc_count != 0)
8661 {
8662 Elf_Internal_Shdr *rel_hdr;
8663 Elf_Internal_Rela *wrel;
8664 bfd_size_type sz;
8665
8666 /* Remove unused toc relocs, and adjust those we keep. */
8667 if (toc_relocs == NULL)
8668 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8669 info->keep_memory);
8670 if (toc_relocs == NULL)
8671 goto error_ret;
8672
8673 wrel = toc_relocs;
8674 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8675 if ((skip[rel->r_offset >> 3]
8676 & (ref_from_discarded | can_optimize)) == 0)
8677 {
8678 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8679 wrel->r_info = rel->r_info;
8680 wrel->r_addend = rel->r_addend;
8681 ++wrel;
8682 }
8683 else if (!dec_dynrel_count (rel->r_info, toc, info,
8684 &local_syms, NULL, NULL))
8685 goto error_ret;
8686
8687 elf_section_data (toc)->relocs = toc_relocs;
8688 toc->reloc_count = wrel - toc_relocs;
8689 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8690 sz = rel_hdr->sh_entsize;
8691 rel_hdr->sh_size = toc->reloc_count * sz;
8692 }
8693 }
8694 else if (toc_relocs != NULL
8695 && elf_section_data (toc)->relocs != toc_relocs)
8696 free (toc_relocs);
8697
8698 if (local_syms != NULL
8699 && symtab_hdr->contents != (unsigned char *) local_syms)
8700 {
8701 if (!info->keep_memory)
8702 free (local_syms);
8703 else
8704 symtab_hdr->contents = (unsigned char *) local_syms;
8705 }
8706 free (skip);
8707 }
8708
8709 return TRUE;
8710 }
8711
8712 /* Return true iff input section I references the TOC using
8713 instructions limited to +/-32k offsets. */
8714
8715 bfd_boolean
8716 ppc64_elf_has_small_toc_reloc (asection *i)
8717 {
8718 return (is_ppc64_elf (i->owner)
8719 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8720 }
8721
8722 /* Allocate space for one GOT entry. */
8723
8724 static void
8725 allocate_got (struct elf_link_hash_entry *h,
8726 struct bfd_link_info *info,
8727 struct got_entry *gent)
8728 {
8729 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8730 bfd_boolean dyn;
8731 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8732 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8733 ? 16 : 8);
8734 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8735 ? 2 : 1) * sizeof (Elf64_External_Rela);
8736 asection *got = ppc64_elf_tdata (gent->owner)->got;
8737
8738 gent->got.offset = got->size;
8739 got->size += entsize;
8740
8741 dyn = htab->elf.dynamic_sections_created;
8742 if ((info->shared
8743 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8744 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8745 || h->root.type != bfd_link_hash_undefweak))
8746 {
8747 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8748 relgot->size += rentsize;
8749 }
8750 else if (h->type == STT_GNU_IFUNC)
8751 {
8752 asection *relgot = htab->reliplt;
8753 relgot->size += rentsize;
8754 htab->got_reli_size += rentsize;
8755 }
8756 }
8757
8758 /* This function merges got entries in the same toc group. */
8759
8760 static void
8761 merge_got_entries (struct got_entry **pent)
8762 {
8763 struct got_entry *ent, *ent2;
8764
8765 for (ent = *pent; ent != NULL; ent = ent->next)
8766 if (!ent->is_indirect)
8767 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8768 if (!ent2->is_indirect
8769 && ent2->addend == ent->addend
8770 && ent2->tls_type == ent->tls_type
8771 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8772 {
8773 ent2->is_indirect = TRUE;
8774 ent2->got.ent = ent;
8775 }
8776 }
8777
8778 /* Allocate space in .plt, .got and associated reloc sections for
8779 dynamic relocs. */
8780
8781 static bfd_boolean
8782 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8783 {
8784 struct bfd_link_info *info;
8785 struct ppc_link_hash_table *htab;
8786 asection *s;
8787 struct ppc_link_hash_entry *eh;
8788 struct elf_dyn_relocs *p;
8789 struct got_entry **pgent, *gent;
8790
8791 if (h->root.type == bfd_link_hash_indirect)
8792 return TRUE;
8793
8794 info = (struct bfd_link_info *) inf;
8795 htab = ppc_hash_table (info);
8796 if (htab == NULL)
8797 return FALSE;
8798
8799 if ((htab->elf.dynamic_sections_created
8800 && h->dynindx != -1
8801 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8802 || h->type == STT_GNU_IFUNC)
8803 {
8804 struct plt_entry *pent;
8805 bfd_boolean doneone = FALSE;
8806 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8807 if (pent->plt.refcount > 0)
8808 {
8809 if (!htab->elf.dynamic_sections_created
8810 || h->dynindx == -1)
8811 {
8812 s = htab->iplt;
8813 pent->plt.offset = s->size;
8814 s->size += PLT_ENTRY_SIZE;
8815 s = htab->reliplt;
8816 }
8817 else
8818 {
8819 /* If this is the first .plt entry, make room for the special
8820 first entry. */
8821 s = htab->plt;
8822 if (s->size == 0)
8823 s->size += PLT_INITIAL_ENTRY_SIZE;
8824
8825 pent->plt.offset = s->size;
8826
8827 /* Make room for this entry. */
8828 s->size += PLT_ENTRY_SIZE;
8829
8830 /* Make room for the .glink code. */
8831 s = htab->glink;
8832 if (s->size == 0)
8833 s->size += GLINK_CALL_STUB_SIZE;
8834 /* We need bigger stubs past index 32767. */
8835 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8836 s->size += 4;
8837 s->size += 2*4;
8838
8839 /* We also need to make an entry in the .rela.plt section. */
8840 s = htab->relplt;
8841 }
8842 s->size += sizeof (Elf64_External_Rela);
8843 doneone = TRUE;
8844 }
8845 else
8846 pent->plt.offset = (bfd_vma) -1;
8847 if (!doneone)
8848 {
8849 h->plt.plist = NULL;
8850 h->needs_plt = 0;
8851 }
8852 }
8853 else
8854 {
8855 h->plt.plist = NULL;
8856 h->needs_plt = 0;
8857 }
8858
8859 eh = (struct ppc_link_hash_entry *) h;
8860 /* Run through the TLS GD got entries first if we're changing them
8861 to TPREL. */
8862 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8863 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8864 if (gent->got.refcount > 0
8865 && (gent->tls_type & TLS_GD) != 0)
8866 {
8867 /* This was a GD entry that has been converted to TPREL. If
8868 there happens to be a TPREL entry we can use that one. */
8869 struct got_entry *ent;
8870 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8871 if (ent->got.refcount > 0
8872 && (ent->tls_type & TLS_TPREL) != 0
8873 && ent->addend == gent->addend
8874 && ent->owner == gent->owner)
8875 {
8876 gent->got.refcount = 0;
8877 break;
8878 }
8879
8880 /* If not, then we'll be using our own TPREL entry. */
8881 if (gent->got.refcount != 0)
8882 gent->tls_type = TLS_TLS | TLS_TPREL;
8883 }
8884
8885 /* Remove any list entry that won't generate a word in the GOT before
8886 we call merge_got_entries. Otherwise we risk merging to empty
8887 entries. */
8888 pgent = &h->got.glist;
8889 while ((gent = *pgent) != NULL)
8890 if (gent->got.refcount > 0)
8891 {
8892 if ((gent->tls_type & TLS_LD) != 0
8893 && !h->def_dynamic)
8894 {
8895 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8896 *pgent = gent->next;
8897 }
8898 else
8899 pgent = &gent->next;
8900 }
8901 else
8902 *pgent = gent->next;
8903
8904 if (!htab->do_multi_toc)
8905 merge_got_entries (&h->got.glist);
8906
8907 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8908 if (!gent->is_indirect)
8909 {
8910 /* Make sure this symbol is output as a dynamic symbol.
8911 Undefined weak syms won't yet be marked as dynamic,
8912 nor will all TLS symbols. */
8913 if (h->dynindx == -1
8914 && !h->forced_local
8915 && h->type != STT_GNU_IFUNC
8916 && htab->elf.dynamic_sections_created)
8917 {
8918 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8919 return FALSE;
8920 }
8921
8922 if (!is_ppc64_elf (gent->owner))
8923 abort ();
8924
8925 allocate_got (h, info, gent);
8926 }
8927
8928 if (eh->dyn_relocs == NULL
8929 || (!htab->elf.dynamic_sections_created
8930 && h->type != STT_GNU_IFUNC))
8931 return TRUE;
8932
8933 /* In the shared -Bsymbolic case, discard space allocated for
8934 dynamic pc-relative relocs against symbols which turn out to be
8935 defined in regular objects. For the normal shared case, discard
8936 space for relocs that have become local due to symbol visibility
8937 changes. */
8938
8939 if (info->shared)
8940 {
8941 /* Relocs that use pc_count are those that appear on a call insn,
8942 or certain REL relocs (see must_be_dyn_reloc) that can be
8943 generated via assembly. We want calls to protected symbols to
8944 resolve directly to the function rather than going via the plt.
8945 If people want function pointer comparisons to work as expected
8946 then they should avoid writing weird assembly. */
8947 if (SYMBOL_CALLS_LOCAL (info, h))
8948 {
8949 struct elf_dyn_relocs **pp;
8950
8951 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8952 {
8953 p->count -= p->pc_count;
8954 p->pc_count = 0;
8955 if (p->count == 0)
8956 *pp = p->next;
8957 else
8958 pp = &p->next;
8959 }
8960 }
8961
8962 /* Also discard relocs on undefined weak syms with non-default
8963 visibility. */
8964 if (eh->dyn_relocs != NULL
8965 && h->root.type == bfd_link_hash_undefweak)
8966 {
8967 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8968 eh->dyn_relocs = NULL;
8969
8970 /* Make sure this symbol is output as a dynamic symbol.
8971 Undefined weak syms won't yet be marked as dynamic. */
8972 else if (h->dynindx == -1
8973 && !h->forced_local)
8974 {
8975 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8976 return FALSE;
8977 }
8978 }
8979 }
8980 else if (h->type == STT_GNU_IFUNC)
8981 {
8982 if (!h->non_got_ref)
8983 eh->dyn_relocs = NULL;
8984 }
8985 else if (ELIMINATE_COPY_RELOCS)
8986 {
8987 /* For the non-shared case, discard space for relocs against
8988 symbols which turn out to need copy relocs or are not
8989 dynamic. */
8990
8991 if (!h->non_got_ref
8992 && !h->def_regular)
8993 {
8994 /* Make sure this symbol is output as a dynamic symbol.
8995 Undefined weak syms won't yet be marked as dynamic. */
8996 if (h->dynindx == -1
8997 && !h->forced_local)
8998 {
8999 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9000 return FALSE;
9001 }
9002
9003 /* If that succeeded, we know we'll be keeping all the
9004 relocs. */
9005 if (h->dynindx != -1)
9006 goto keep;
9007 }
9008
9009 eh->dyn_relocs = NULL;
9010
9011 keep: ;
9012 }
9013
9014 /* Finally, allocate space. */
9015 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9016 {
9017 asection *sreloc = elf_section_data (p->sec)->sreloc;
9018 if (!htab->elf.dynamic_sections_created)
9019 sreloc = htab->reliplt;
9020 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9021 }
9022
9023 return TRUE;
9024 }
9025
9026 /* Find any dynamic relocs that apply to read-only sections. */
9027
9028 static bfd_boolean
9029 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9030 {
9031 struct ppc_link_hash_entry *eh;
9032 struct elf_dyn_relocs *p;
9033
9034 eh = (struct ppc_link_hash_entry *) h;
9035 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9036 {
9037 asection *s = p->sec->output_section;
9038
9039 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9040 {
9041 struct bfd_link_info *info = inf;
9042
9043 info->flags |= DF_TEXTREL;
9044
9045 /* Not an error, just cut short the traversal. */
9046 return FALSE;
9047 }
9048 }
9049 return TRUE;
9050 }
9051
9052 /* Set the sizes of the dynamic sections. */
9053
9054 static bfd_boolean
9055 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9056 struct bfd_link_info *info)
9057 {
9058 struct ppc_link_hash_table *htab;
9059 bfd *dynobj;
9060 asection *s;
9061 bfd_boolean relocs;
9062 bfd *ibfd;
9063 struct got_entry *first_tlsld;
9064
9065 htab = ppc_hash_table (info);
9066 if (htab == NULL)
9067 return FALSE;
9068
9069 dynobj = htab->elf.dynobj;
9070 if (dynobj == NULL)
9071 abort ();
9072
9073 if (htab->elf.dynamic_sections_created)
9074 {
9075 /* Set the contents of the .interp section to the interpreter. */
9076 if (info->executable)
9077 {
9078 s = bfd_get_section_by_name (dynobj, ".interp");
9079 if (s == NULL)
9080 abort ();
9081 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9082 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9083 }
9084 }
9085
9086 /* Set up .got offsets for local syms, and space for local dynamic
9087 relocs. */
9088 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9089 {
9090 struct got_entry **lgot_ents;
9091 struct got_entry **end_lgot_ents;
9092 struct plt_entry **local_plt;
9093 struct plt_entry **end_local_plt;
9094 unsigned char *lgot_masks;
9095 bfd_size_type locsymcount;
9096 Elf_Internal_Shdr *symtab_hdr;
9097 asection *srel;
9098
9099 if (!is_ppc64_elf (ibfd))
9100 continue;
9101
9102 for (s = ibfd->sections; s != NULL; s = s->next)
9103 {
9104 struct elf_dyn_relocs *p;
9105
9106 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9107 {
9108 if (!bfd_is_abs_section (p->sec)
9109 && bfd_is_abs_section (p->sec->output_section))
9110 {
9111 /* Input section has been discarded, either because
9112 it is a copy of a linkonce section or due to
9113 linker script /DISCARD/, so we'll be discarding
9114 the relocs too. */
9115 }
9116 else if (p->count != 0)
9117 {
9118 srel = elf_section_data (p->sec)->sreloc;
9119 if (!htab->elf.dynamic_sections_created)
9120 srel = htab->reliplt;
9121 srel->size += p->count * sizeof (Elf64_External_Rela);
9122 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9123 info->flags |= DF_TEXTREL;
9124 }
9125 }
9126 }
9127
9128 lgot_ents = elf_local_got_ents (ibfd);
9129 if (!lgot_ents)
9130 continue;
9131
9132 symtab_hdr = &elf_symtab_hdr (ibfd);
9133 locsymcount = symtab_hdr->sh_info;
9134 end_lgot_ents = lgot_ents + locsymcount;
9135 local_plt = (struct plt_entry **) end_lgot_ents;
9136 end_local_plt = local_plt + locsymcount;
9137 lgot_masks = (unsigned char *) end_local_plt;
9138 s = ppc64_elf_tdata (ibfd)->got;
9139 srel = ppc64_elf_tdata (ibfd)->relgot;
9140 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9141 {
9142 struct got_entry **pent, *ent;
9143
9144 pent = lgot_ents;
9145 while ((ent = *pent) != NULL)
9146 if (ent->got.refcount > 0)
9147 {
9148 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9149 {
9150 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9151 *pent = ent->next;
9152 }
9153 else
9154 {
9155 unsigned int num = 1;
9156 ent->got.offset = s->size;
9157 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9158 num = 2;
9159 s->size += num * 8;
9160 if (info->shared)
9161 srel->size += num * sizeof (Elf64_External_Rela);
9162 else if ((*lgot_masks & PLT_IFUNC) != 0)
9163 {
9164 htab->reliplt->size
9165 += num * sizeof (Elf64_External_Rela);
9166 htab->got_reli_size
9167 += num * sizeof (Elf64_External_Rela);
9168 }
9169 pent = &ent->next;
9170 }
9171 }
9172 else
9173 *pent = ent->next;
9174 }
9175
9176 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9177 for (; local_plt < end_local_plt; ++local_plt)
9178 {
9179 struct plt_entry *ent;
9180
9181 for (ent = *local_plt; ent != NULL; ent = ent->next)
9182 if (ent->plt.refcount > 0)
9183 {
9184 s = htab->iplt;
9185 ent->plt.offset = s->size;
9186 s->size += PLT_ENTRY_SIZE;
9187
9188 htab->reliplt->size += sizeof (Elf64_External_Rela);
9189 }
9190 else
9191 ent->plt.offset = (bfd_vma) -1;
9192 }
9193 }
9194
9195 /* Allocate global sym .plt and .got entries, and space for global
9196 sym dynamic relocs. */
9197 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9198
9199 first_tlsld = NULL;
9200 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9201 {
9202 struct got_entry *ent;
9203
9204 if (!is_ppc64_elf (ibfd))
9205 continue;
9206
9207 ent = ppc64_tlsld_got (ibfd);
9208 if (ent->got.refcount > 0)
9209 {
9210 if (!htab->do_multi_toc && first_tlsld != NULL)
9211 {
9212 ent->is_indirect = TRUE;
9213 ent->got.ent = first_tlsld;
9214 }
9215 else
9216 {
9217 if (first_tlsld == NULL)
9218 first_tlsld = ent;
9219 s = ppc64_elf_tdata (ibfd)->got;
9220 ent->got.offset = s->size;
9221 ent->owner = ibfd;
9222 s->size += 16;
9223 if (info->shared)
9224 {
9225 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9226 srel->size += sizeof (Elf64_External_Rela);
9227 }
9228 }
9229 }
9230 else
9231 ent->got.offset = (bfd_vma) -1;
9232 }
9233
9234 /* We now have determined the sizes of the various dynamic sections.
9235 Allocate memory for them. */
9236 relocs = FALSE;
9237 for (s = dynobj->sections; s != NULL; s = s->next)
9238 {
9239 if ((s->flags & SEC_LINKER_CREATED) == 0)
9240 continue;
9241
9242 if (s == htab->brlt || s == htab->relbrlt)
9243 /* These haven't been allocated yet; don't strip. */
9244 continue;
9245 else if (s == htab->got
9246 || s == htab->plt
9247 || s == htab->iplt
9248 || s == htab->glink
9249 || s == htab->dynbss)
9250 {
9251 /* Strip this section if we don't need it; see the
9252 comment below. */
9253 }
9254 else if (s == htab->glink_eh_frame)
9255 {
9256 if (!bfd_is_abs_section (s->output_section))
9257 /* Not sized yet. */
9258 continue;
9259 }
9260 else if (CONST_STRNEQ (s->name, ".rela"))
9261 {
9262 if (s->size != 0)
9263 {
9264 if (s != htab->relplt)
9265 relocs = TRUE;
9266
9267 /* We use the reloc_count field as a counter if we need
9268 to copy relocs into the output file. */
9269 s->reloc_count = 0;
9270 }
9271 }
9272 else
9273 {
9274 /* It's not one of our sections, so don't allocate space. */
9275 continue;
9276 }
9277
9278 if (s->size == 0)
9279 {
9280 /* If we don't need this section, strip it from the
9281 output file. This is mostly to handle .rela.bss and
9282 .rela.plt. We must create both sections in
9283 create_dynamic_sections, because they must be created
9284 before the linker maps input sections to output
9285 sections. The linker does that before
9286 adjust_dynamic_symbol is called, and it is that
9287 function which decides whether anything needs to go
9288 into these sections. */
9289 s->flags |= SEC_EXCLUDE;
9290 continue;
9291 }
9292
9293 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9294 continue;
9295
9296 /* Allocate memory for the section contents. We use bfd_zalloc
9297 here in case unused entries are not reclaimed before the
9298 section's contents are written out. This should not happen,
9299 but this way if it does we get a R_PPC64_NONE reloc in .rela
9300 sections instead of garbage.
9301 We also rely on the section contents being zero when writing
9302 the GOT. */
9303 s->contents = bfd_zalloc (dynobj, s->size);
9304 if (s->contents == NULL)
9305 return FALSE;
9306 }
9307
9308 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9309 {
9310 if (!is_ppc64_elf (ibfd))
9311 continue;
9312
9313 s = ppc64_elf_tdata (ibfd)->got;
9314 if (s != NULL && s != htab->got)
9315 {
9316 if (s->size == 0)
9317 s->flags |= SEC_EXCLUDE;
9318 else
9319 {
9320 s->contents = bfd_zalloc (ibfd, s->size);
9321 if (s->contents == NULL)
9322 return FALSE;
9323 }
9324 }
9325 s = ppc64_elf_tdata (ibfd)->relgot;
9326 if (s != NULL)
9327 {
9328 if (s->size == 0)
9329 s->flags |= SEC_EXCLUDE;
9330 else
9331 {
9332 s->contents = bfd_zalloc (ibfd, s->size);
9333 if (s->contents == NULL)
9334 return FALSE;
9335 relocs = TRUE;
9336 s->reloc_count = 0;
9337 }
9338 }
9339 }
9340
9341 if (htab->elf.dynamic_sections_created)
9342 {
9343 /* Add some entries to the .dynamic section. We fill in the
9344 values later, in ppc64_elf_finish_dynamic_sections, but we
9345 must add the entries now so that we get the correct size for
9346 the .dynamic section. The DT_DEBUG entry is filled in by the
9347 dynamic linker and used by the debugger. */
9348 #define add_dynamic_entry(TAG, VAL) \
9349 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9350
9351 if (info->executable)
9352 {
9353 if (!add_dynamic_entry (DT_DEBUG, 0))
9354 return FALSE;
9355 }
9356
9357 if (htab->plt != NULL && htab->plt->size != 0)
9358 {
9359 if (!add_dynamic_entry (DT_PLTGOT, 0)
9360 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9361 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9362 || !add_dynamic_entry (DT_JMPREL, 0)
9363 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9364 return FALSE;
9365 }
9366
9367 if (NO_OPD_RELOCS)
9368 {
9369 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9370 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9371 return FALSE;
9372 }
9373
9374 if (!htab->no_tls_get_addr_opt
9375 && htab->tls_get_addr_fd != NULL
9376 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9377 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9378 return FALSE;
9379
9380 if (relocs)
9381 {
9382 if (!add_dynamic_entry (DT_RELA, 0)
9383 || !add_dynamic_entry (DT_RELASZ, 0)
9384 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9385 return FALSE;
9386
9387 /* If any dynamic relocs apply to a read-only section,
9388 then we need a DT_TEXTREL entry. */
9389 if ((info->flags & DF_TEXTREL) == 0)
9390 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9391
9392 if ((info->flags & DF_TEXTREL) != 0)
9393 {
9394 if (!add_dynamic_entry (DT_TEXTREL, 0))
9395 return FALSE;
9396 }
9397 }
9398 }
9399 #undef add_dynamic_entry
9400
9401 return TRUE;
9402 }
9403
9404 /* Determine the type of stub needed, if any, for a call. */
9405
9406 static inline enum ppc_stub_type
9407 ppc_type_of_stub (asection *input_sec,
9408 const Elf_Internal_Rela *rel,
9409 struct ppc_link_hash_entry **hash,
9410 struct plt_entry **plt_ent,
9411 bfd_vma destination)
9412 {
9413 struct ppc_link_hash_entry *h = *hash;
9414 bfd_vma location;
9415 bfd_vma branch_offset;
9416 bfd_vma max_branch_offset;
9417 enum elf_ppc64_reloc_type r_type;
9418
9419 if (h != NULL)
9420 {
9421 struct plt_entry *ent;
9422 struct ppc_link_hash_entry *fdh = h;
9423 if (h->oh != NULL
9424 && h->oh->is_func_descriptor)
9425 {
9426 fdh = ppc_follow_link (h->oh);
9427 *hash = fdh;
9428 }
9429
9430 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9431 if (ent->addend == rel->r_addend
9432 && ent->plt.offset != (bfd_vma) -1)
9433 {
9434 *plt_ent = ent;
9435 return ppc_stub_plt_call;
9436 }
9437
9438 /* Here, we know we don't have a plt entry. If we don't have a
9439 either a defined function descriptor or a defined entry symbol
9440 in a regular object file, then it is pointless trying to make
9441 any other type of stub. */
9442 if (!is_static_defined (&fdh->elf)
9443 && !is_static_defined (&h->elf))
9444 return ppc_stub_none;
9445 }
9446 else if (elf_local_got_ents (input_sec->owner) != NULL)
9447 {
9448 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9449 struct plt_entry **local_plt = (struct plt_entry **)
9450 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9451 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9452
9453 if (local_plt[r_symndx] != NULL)
9454 {
9455 struct plt_entry *ent;
9456
9457 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9458 if (ent->addend == rel->r_addend
9459 && ent->plt.offset != (bfd_vma) -1)
9460 {
9461 *plt_ent = ent;
9462 return ppc_stub_plt_call;
9463 }
9464 }
9465 }
9466
9467 /* Determine where the call point is. */
9468 location = (input_sec->output_offset
9469 + input_sec->output_section->vma
9470 + rel->r_offset);
9471
9472 branch_offset = destination - location;
9473 r_type = ELF64_R_TYPE (rel->r_info);
9474
9475 /* Determine if a long branch stub is needed. */
9476 max_branch_offset = 1 << 25;
9477 if (r_type != R_PPC64_REL24)
9478 max_branch_offset = 1 << 15;
9479
9480 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9481 /* We need a stub. Figure out whether a long_branch or plt_branch
9482 is needed later. */
9483 return ppc_stub_long_branch;
9484
9485 return ppc_stub_none;
9486 }
9487
9488 /* With power7 weakly ordered memory model, it is possible for ld.so
9489 to update a plt entry in one thread and have another thread see a
9490 stale zero toc entry. To avoid this we need some sort of acquire
9491 barrier in the call stub. One solution is to make the load of the
9492 toc word seem to appear to depend on the load of the function entry
9493 word. Another solution is to test for r2 being zero, and branch to
9494 the appropriate glink entry if so.
9495
9496 . fake dep barrier compare
9497 . ld 11,xxx(2) ld 11,xxx(2)
9498 . mtctr 11 mtctr 11
9499 . xor 11,11,11 ld 2,xxx+8(2)
9500 . add 2,2,11 cmpldi 2,0
9501 . ld 2,xxx+8(2) bnectr+
9502 . bctr b <glink_entry>
9503
9504 The solution involving the compare turns out to be faster, so
9505 that's what we use unless the branch won't reach. */
9506
9507 #define ALWAYS_USE_FAKE_DEP 0
9508 #define ALWAYS_EMIT_R2SAVE 0
9509
9510 #define PPC_LO(v) ((v) & 0xffff)
9511 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9512 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9513
9514 static inline unsigned int
9515 plt_stub_size (struct ppc_link_hash_table *htab,
9516 struct ppc_stub_hash_entry *stub_entry,
9517 bfd_vma off)
9518 {
9519 unsigned size = PLT_CALL_STUB_SIZE;
9520
9521 if (!(ALWAYS_EMIT_R2SAVE
9522 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9523 size -= 4;
9524 if (!htab->plt_static_chain)
9525 size -= 4;
9526 if (htab->plt_thread_safe)
9527 size += 8;
9528 if (PPC_HA (off) == 0)
9529 size -= 4;
9530 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9531 size += 4;
9532 if (stub_entry->h != NULL
9533 && (stub_entry->h == htab->tls_get_addr_fd
9534 || stub_entry->h == htab->tls_get_addr)
9535 && !htab->no_tls_get_addr_opt)
9536 size += 13 * 4;
9537 return size;
9538 }
9539
9540 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9541 then return the padding needed to do so. */
9542 static inline unsigned int
9543 plt_stub_pad (struct ppc_link_hash_table *htab,
9544 struct ppc_stub_hash_entry *stub_entry,
9545 bfd_vma plt_off)
9546 {
9547 int stub_align = 1 << htab->plt_stub_align;
9548 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9549 bfd_vma stub_off = stub_entry->stub_sec->size;
9550
9551 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9552 > (stub_size & -stub_align))
9553 return stub_align - (stub_off & (stub_align - 1));
9554 return 0;
9555 }
9556
9557 /* Build a .plt call stub. */
9558
9559 static inline bfd_byte *
9560 build_plt_stub (struct ppc_link_hash_table *htab,
9561 struct ppc_stub_hash_entry *stub_entry,
9562 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9563 {
9564 bfd *obfd = htab->stub_bfd;
9565 bfd_boolean plt_static_chain = htab->plt_static_chain;
9566 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9567 bfd_boolean use_fake_dep = plt_thread_safe;
9568 bfd_vma cmp_branch_off = 0;
9569
9570 if (!ALWAYS_USE_FAKE_DEP
9571 && plt_thread_safe
9572 && !(stub_entry->h != NULL
9573 && (stub_entry->h == htab->tls_get_addr_fd
9574 || stub_entry->h == htab->tls_get_addr)
9575 && !htab->no_tls_get_addr_opt))
9576 {
9577 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9578 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9579 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9580 bfd_vma to, from;
9581
9582 if (pltindex > 32767)
9583 glinkoff += (pltindex - 32767) * 4;
9584 to = (glinkoff
9585 + htab->glink->output_offset
9586 + htab->glink->output_section->vma);
9587 from = (p - stub_entry->stub_sec->contents
9588 + 4 * (ALWAYS_EMIT_R2SAVE
9589 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9590 + 4 * (PPC_HA (offset) != 0)
9591 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9592 != PPC_HA (offset))
9593 + 4 * (plt_static_chain != 0)
9594 + 20
9595 + stub_entry->stub_sec->output_offset
9596 + stub_entry->stub_sec->output_section->vma);
9597 cmp_branch_off = to - from;
9598 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9599 }
9600
9601 if (PPC_HA (offset) != 0)
9602 {
9603 if (r != NULL)
9604 {
9605 if (ALWAYS_EMIT_R2SAVE
9606 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9607 r[0].r_offset += 4;
9608 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9609 r[1].r_offset = r[0].r_offset + 4;
9610 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9611 r[1].r_addend = r[0].r_addend;
9612 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9613 {
9614 r[2].r_offset = r[1].r_offset + 4;
9615 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9616 r[2].r_addend = r[0].r_addend;
9617 }
9618 else
9619 {
9620 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9621 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9622 r[2].r_addend = r[0].r_addend + 8;
9623 if (plt_static_chain)
9624 {
9625 r[3].r_offset = r[2].r_offset + 4;
9626 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9627 r[3].r_addend = r[0].r_addend + 16;
9628 }
9629 }
9630 }
9631 if (ALWAYS_EMIT_R2SAVE
9632 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9633 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9634 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9635 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9636 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9637 {
9638 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9639 offset = 0;
9640 }
9641 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9642 if (use_fake_dep)
9643 {
9644 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9645 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9646 }
9647 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9648 if (plt_static_chain)
9649 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9650 }
9651 else
9652 {
9653 if (r != NULL)
9654 {
9655 if (ALWAYS_EMIT_R2SAVE
9656 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9657 r[0].r_offset += 4;
9658 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9659 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9660 {
9661 r[1].r_offset = r[0].r_offset + 4;
9662 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9663 r[1].r_addend = r[0].r_addend;
9664 }
9665 else
9666 {
9667 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9668 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9669 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9670 if (plt_static_chain)
9671 {
9672 r[2].r_offset = r[1].r_offset + 4;
9673 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9674 r[2].r_addend = r[0].r_addend + 8;
9675 }
9676 }
9677 }
9678 if (ALWAYS_EMIT_R2SAVE
9679 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9680 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9681 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9682 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9683 {
9684 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9685 offset = 0;
9686 }
9687 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9688 if (use_fake_dep)
9689 {
9690 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9691 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9692 }
9693 if (plt_static_chain)
9694 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9695 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9696 }
9697 if (plt_thread_safe && !use_fake_dep)
9698 {
9699 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9700 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9701 bfd_put_32 (obfd, B_DOT + cmp_branch_off, p), p += 4;
9702 }
9703 else
9704 bfd_put_32 (obfd, BCTR, p), p += 4;
9705 return p;
9706 }
9707
9708 /* Build a special .plt call stub for __tls_get_addr. */
9709
9710 #define LD_R11_0R3 0xe9630000
9711 #define LD_R12_0R3 0xe9830000
9712 #define MR_R0_R3 0x7c601b78
9713 #define CMPDI_R11_0 0x2c2b0000
9714 #define ADD_R3_R12_R13 0x7c6c6a14
9715 #define BEQLR 0x4d820020
9716 #define MR_R3_R0 0x7c030378
9717 #define MFLR_R11 0x7d6802a6
9718 #define STD_R11_0R1 0xf9610000
9719 #define BCTRL 0x4e800421
9720 #define LD_R11_0R1 0xe9610000
9721 #define LD_R2_0R1 0xe8410000
9722 #define MTLR_R11 0x7d6803a6
9723
9724 static inline bfd_byte *
9725 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
9726 struct ppc_stub_hash_entry *stub_entry,
9727 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9728 {
9729 bfd *obfd = htab->stub_bfd;
9730
9731 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9732 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9733 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9734 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9735 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9736 bfd_put_32 (obfd, BEQLR, p), p += 4;
9737 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9738 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9739 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9740
9741 if (r != NULL)
9742 r[0].r_offset += 9 * 4;
9743 p = build_plt_stub (htab, stub_entry, p, offset, r);
9744 bfd_put_32 (obfd, BCTRL, p - 4);
9745
9746 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9747 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9748 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9749 bfd_put_32 (obfd, BLR, p), p += 4;
9750
9751 return p;
9752 }
9753
9754 static Elf_Internal_Rela *
9755 get_relocs (asection *sec, int count)
9756 {
9757 Elf_Internal_Rela *relocs;
9758 struct bfd_elf_section_data *elfsec_data;
9759
9760 elfsec_data = elf_section_data (sec);
9761 relocs = elfsec_data->relocs;
9762 if (relocs == NULL)
9763 {
9764 bfd_size_type relsize;
9765 relsize = sec->reloc_count * sizeof (*relocs);
9766 relocs = bfd_alloc (sec->owner, relsize);
9767 if (relocs == NULL)
9768 return NULL;
9769 elfsec_data->relocs = relocs;
9770 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9771 sizeof (Elf_Internal_Shdr));
9772 if (elfsec_data->rela.hdr == NULL)
9773 return NULL;
9774 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9775 * sizeof (Elf64_External_Rela));
9776 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9777 sec->reloc_count = 0;
9778 }
9779 relocs += sec->reloc_count;
9780 sec->reloc_count += count;
9781 return relocs;
9782 }
9783
9784 static bfd_vma
9785 get_r2off (struct bfd_link_info *info,
9786 struct ppc_stub_hash_entry *stub_entry)
9787 {
9788 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9789 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9790
9791 if (r2off == 0)
9792 {
9793 /* Support linking -R objects. Get the toc pointer from the
9794 opd entry. */
9795 char buf[8];
9796 asection *opd = stub_entry->h->elf.root.u.def.section;
9797 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9798
9799 if (strcmp (opd->name, ".opd") != 0
9800 || opd->reloc_count != 0)
9801 {
9802 info->callbacks->einfo (_("%P: cannot find opd entry toc for %s\n"),
9803 stub_entry->h->elf.root.root.string);
9804 bfd_set_error (bfd_error_bad_value);
9805 return 0;
9806 }
9807 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9808 return 0;
9809 r2off = bfd_get_64 (opd->owner, buf);
9810 r2off -= elf_gp (info->output_bfd);
9811 }
9812 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9813 return r2off;
9814 }
9815
9816 static bfd_boolean
9817 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9818 {
9819 struct ppc_stub_hash_entry *stub_entry;
9820 struct ppc_branch_hash_entry *br_entry;
9821 struct bfd_link_info *info;
9822 struct ppc_link_hash_table *htab;
9823 bfd_byte *loc;
9824 bfd_byte *p;
9825 bfd_vma dest, off;
9826 int size;
9827 Elf_Internal_Rela *r;
9828 asection *plt;
9829
9830 /* Massage our args to the form they really have. */
9831 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9832 info = in_arg;
9833
9834 htab = ppc_hash_table (info);
9835 if (htab == NULL)
9836 return FALSE;
9837
9838 /* Make a note of the offset within the stubs for this entry. */
9839 stub_entry->stub_offset = stub_entry->stub_sec->size;
9840 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9841
9842 htab->stub_count[stub_entry->stub_type - 1] += 1;
9843 switch (stub_entry->stub_type)
9844 {
9845 case ppc_stub_long_branch:
9846 case ppc_stub_long_branch_r2off:
9847 /* Branches are relative. This is where we are going to. */
9848 off = dest = (stub_entry->target_value
9849 + stub_entry->target_section->output_offset
9850 + stub_entry->target_section->output_section->vma);
9851
9852 /* And this is where we are coming from. */
9853 off -= (stub_entry->stub_offset
9854 + stub_entry->stub_sec->output_offset
9855 + stub_entry->stub_sec->output_section->vma);
9856
9857 size = 4;
9858 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9859 {
9860 bfd_vma r2off = get_r2off (info, stub_entry);
9861
9862 if (r2off == 0)
9863 {
9864 htab->stub_error = TRUE;
9865 return FALSE;
9866 }
9867 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9868 loc += 4;
9869 size = 12;
9870 if (PPC_HA (r2off) != 0)
9871 {
9872 size = 16;
9873 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9874 loc += 4;
9875 }
9876 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9877 loc += 4;
9878 off -= size - 4;
9879 }
9880 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9881
9882 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9883 {
9884 info->callbacks->einfo (_("%P: long branch stub `%s' offset overflow\n"),
9885 stub_entry->root.string);
9886 htab->stub_error = TRUE;
9887 return FALSE;
9888 }
9889
9890 if (info->emitrelocations)
9891 {
9892 r = get_relocs (stub_entry->stub_sec, 1);
9893 if (r == NULL)
9894 return FALSE;
9895 r->r_offset = loc - stub_entry->stub_sec->contents;
9896 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9897 r->r_addend = dest;
9898 if (stub_entry->h != NULL)
9899 {
9900 struct elf_link_hash_entry **hashes;
9901 unsigned long symndx;
9902 struct ppc_link_hash_entry *h;
9903
9904 hashes = elf_sym_hashes (htab->stub_bfd);
9905 if (hashes == NULL)
9906 {
9907 bfd_size_type hsize;
9908
9909 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9910 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9911 if (hashes == NULL)
9912 return FALSE;
9913 elf_sym_hashes (htab->stub_bfd) = hashes;
9914 htab->stub_globals = 1;
9915 }
9916 symndx = htab->stub_globals++;
9917 h = stub_entry->h;
9918 hashes[symndx] = &h->elf;
9919 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9920 if (h->oh != NULL && h->oh->is_func)
9921 h = ppc_follow_link (h->oh);
9922 if (h->elf.root.u.def.section != stub_entry->target_section)
9923 /* H is an opd symbol. The addend must be zero. */
9924 r->r_addend = 0;
9925 else
9926 {
9927 off = (h->elf.root.u.def.value
9928 + h->elf.root.u.def.section->output_offset
9929 + h->elf.root.u.def.section->output_section->vma);
9930 r->r_addend -= off;
9931 }
9932 }
9933 }
9934 break;
9935
9936 case ppc_stub_plt_branch:
9937 case ppc_stub_plt_branch_r2off:
9938 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9939 stub_entry->root.string + 9,
9940 FALSE, FALSE);
9941 if (br_entry == NULL)
9942 {
9943 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
9944 stub_entry->root.string);
9945 htab->stub_error = TRUE;
9946 return FALSE;
9947 }
9948
9949 dest = (stub_entry->target_value
9950 + stub_entry->target_section->output_offset
9951 + stub_entry->target_section->output_section->vma);
9952
9953 bfd_put_64 (htab->brlt->owner, dest,
9954 htab->brlt->contents + br_entry->offset);
9955
9956 if (br_entry->iter == htab->stub_iteration)
9957 {
9958 br_entry->iter = 0;
9959
9960 if (htab->relbrlt != NULL)
9961 {
9962 /* Create a reloc for the branch lookup table entry. */
9963 Elf_Internal_Rela rela;
9964 bfd_byte *rl;
9965
9966 rela.r_offset = (br_entry->offset
9967 + htab->brlt->output_offset
9968 + htab->brlt->output_section->vma);
9969 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9970 rela.r_addend = dest;
9971
9972 rl = htab->relbrlt->contents;
9973 rl += (htab->relbrlt->reloc_count++
9974 * sizeof (Elf64_External_Rela));
9975 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9976 }
9977 else if (info->emitrelocations)
9978 {
9979 r = get_relocs (htab->brlt, 1);
9980 if (r == NULL)
9981 return FALSE;
9982 /* brlt, being SEC_LINKER_CREATED does not go through the
9983 normal reloc processing. Symbols and offsets are not
9984 translated from input file to output file form, so
9985 set up the offset per the output file. */
9986 r->r_offset = (br_entry->offset
9987 + htab->brlt->output_offset
9988 + htab->brlt->output_section->vma);
9989 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9990 r->r_addend = dest;
9991 }
9992 }
9993
9994 dest = (br_entry->offset
9995 + htab->brlt->output_offset
9996 + htab->brlt->output_section->vma);
9997
9998 off = (dest
9999 - elf_gp (htab->brlt->output_section->owner)
10000 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10001
10002 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10003 {
10004 info->callbacks->einfo
10005 (_("%P: linkage table error against `%s'\n"),
10006 stub_entry->root.string);
10007 bfd_set_error (bfd_error_bad_value);
10008 htab->stub_error = TRUE;
10009 return FALSE;
10010 }
10011
10012 if (info->emitrelocations)
10013 {
10014 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10015 if (r == NULL)
10016 return FALSE;
10017 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10018 if (bfd_big_endian (info->output_bfd))
10019 r[0].r_offset += 2;
10020 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10021 r[0].r_offset += 4;
10022 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10023 r[0].r_addend = dest;
10024 if (PPC_HA (off) != 0)
10025 {
10026 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10027 r[1].r_offset = r[0].r_offset + 4;
10028 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10029 r[1].r_addend = r[0].r_addend;
10030 }
10031 }
10032
10033 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10034 {
10035 if (PPC_HA (off) != 0)
10036 {
10037 size = 16;
10038 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10039 loc += 4;
10040 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10041 }
10042 else
10043 {
10044 size = 12;
10045 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10046 }
10047 }
10048 else
10049 {
10050 bfd_vma r2off = get_r2off (info, stub_entry);
10051
10052 if (r2off == 0)
10053 {
10054 htab->stub_error = TRUE;
10055 return FALSE;
10056 }
10057
10058 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10059 loc += 4;
10060 size = 20;
10061 if (PPC_HA (off) != 0)
10062 {
10063 size += 4;
10064 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10065 loc += 4;
10066 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10067 loc += 4;
10068 }
10069 else
10070 {
10071 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10072 loc += 4;
10073 }
10074
10075 if (PPC_HA (r2off) != 0)
10076 {
10077 size += 4;
10078 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10079 loc += 4;
10080 }
10081 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10082 }
10083 loc += 4;
10084 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10085 loc += 4;
10086 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10087 break;
10088
10089 case ppc_stub_plt_call:
10090 case ppc_stub_plt_call_r2save:
10091 if (stub_entry->h != NULL
10092 && stub_entry->h->is_func_descriptor
10093 && stub_entry->h->oh != NULL)
10094 {
10095 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10096
10097 /* If the old-ABI "dot-symbol" is undefined make it weak so
10098 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10099 FIXME: We used to define the symbol on one of the call
10100 stubs instead, which is why we test symbol section id
10101 against htab->top_id in various places. Likely all
10102 these checks could now disappear. */
10103 if (fh->elf.root.type == bfd_link_hash_undefined)
10104 fh->elf.root.type = bfd_link_hash_undefweak;
10105 /* Stop undo_symbol_twiddle changing it back to undefined. */
10106 fh->was_undefined = 0;
10107 }
10108
10109 /* Now build the stub. */
10110 dest = stub_entry->plt_ent->plt.offset & ~1;
10111 if (dest >= (bfd_vma) -2)
10112 abort ();
10113
10114 plt = htab->plt;
10115 if (!htab->elf.dynamic_sections_created
10116 || stub_entry->h == NULL
10117 || stub_entry->h->elf.dynindx == -1)
10118 plt = htab->iplt;
10119
10120 dest += plt->output_offset + plt->output_section->vma;
10121
10122 if (stub_entry->h == NULL
10123 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10124 {
10125 Elf_Internal_Rela rela;
10126 bfd_byte *rl;
10127
10128 rela.r_offset = dest;
10129 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10130 rela.r_addend = (stub_entry->target_value
10131 + stub_entry->target_section->output_offset
10132 + stub_entry->target_section->output_section->vma);
10133
10134 rl = (htab->reliplt->contents
10135 + (htab->reliplt->reloc_count++
10136 * sizeof (Elf64_External_Rela)));
10137 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10138 stub_entry->plt_ent->plt.offset |= 1;
10139 }
10140
10141 off = (dest
10142 - elf_gp (plt->output_section->owner)
10143 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10144
10145 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10146 {
10147 info->callbacks->einfo
10148 (_("%P: linkage table error against `%s'\n"),
10149 stub_entry->h != NULL
10150 ? stub_entry->h->elf.root.root.string
10151 : "<local sym>");
10152 bfd_set_error (bfd_error_bad_value);
10153 htab->stub_error = TRUE;
10154 return FALSE;
10155 }
10156
10157 if (htab->plt_stub_align != 0)
10158 {
10159 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10160
10161 stub_entry->stub_sec->size += pad;
10162 stub_entry->stub_offset = stub_entry->stub_sec->size;
10163 loc += pad;
10164 }
10165
10166 r = NULL;
10167 if (info->emitrelocations)
10168 {
10169 r = get_relocs (stub_entry->stub_sec,
10170 (2
10171 + (PPC_HA (off) != 0)
10172 + (htab->plt_static_chain
10173 && PPC_HA (off + 16) == PPC_HA (off))));
10174 if (r == NULL)
10175 return FALSE;
10176 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10177 if (bfd_big_endian (info->output_bfd))
10178 r[0].r_offset += 2;
10179 r[0].r_addend = dest;
10180 }
10181 if (stub_entry->h != NULL
10182 && (stub_entry->h == htab->tls_get_addr_fd
10183 || stub_entry->h == htab->tls_get_addr)
10184 && !htab->no_tls_get_addr_opt)
10185 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10186 else
10187 p = build_plt_stub (htab, stub_entry, loc, off, r);
10188 size = p - loc;
10189 break;
10190
10191 default:
10192 BFD_FAIL ();
10193 return FALSE;
10194 }
10195
10196 stub_entry->stub_sec->size += size;
10197
10198 if (htab->emit_stub_syms)
10199 {
10200 struct elf_link_hash_entry *h;
10201 size_t len1, len2;
10202 char *name;
10203 const char *const stub_str[] = { "long_branch",
10204 "long_branch_r2off",
10205 "plt_branch",
10206 "plt_branch_r2off",
10207 "plt_call",
10208 "plt_call" };
10209
10210 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10211 len2 = strlen (stub_entry->root.string);
10212 name = bfd_malloc (len1 + len2 + 2);
10213 if (name == NULL)
10214 return FALSE;
10215 memcpy (name, stub_entry->root.string, 9);
10216 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10217 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10218 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10219 if (h == NULL)
10220 return FALSE;
10221 if (h->root.type == bfd_link_hash_new)
10222 {
10223 h->root.type = bfd_link_hash_defined;
10224 h->root.u.def.section = stub_entry->stub_sec;
10225 h->root.u.def.value = stub_entry->stub_offset;
10226 h->ref_regular = 1;
10227 h->def_regular = 1;
10228 h->ref_regular_nonweak = 1;
10229 h->forced_local = 1;
10230 h->non_elf = 0;
10231 }
10232 }
10233
10234 return TRUE;
10235 }
10236
10237 /* As above, but don't actually build the stub. Just bump offset so
10238 we know stub section sizes, and select plt_branch stubs where
10239 long_branch stubs won't do. */
10240
10241 static bfd_boolean
10242 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10243 {
10244 struct ppc_stub_hash_entry *stub_entry;
10245 struct bfd_link_info *info;
10246 struct ppc_link_hash_table *htab;
10247 bfd_vma off;
10248 int size;
10249
10250 /* Massage our args to the form they really have. */
10251 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10252 info = in_arg;
10253
10254 htab = ppc_hash_table (info);
10255 if (htab == NULL)
10256 return FALSE;
10257
10258 if (stub_entry->stub_type == ppc_stub_plt_call
10259 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10260 {
10261 asection *plt;
10262 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10263 if (off >= (bfd_vma) -2)
10264 abort ();
10265 plt = htab->plt;
10266 if (!htab->elf.dynamic_sections_created
10267 || stub_entry->h == NULL
10268 || stub_entry->h->elf.dynindx == -1)
10269 plt = htab->iplt;
10270 off += (plt->output_offset
10271 + plt->output_section->vma
10272 - elf_gp (plt->output_section->owner)
10273 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10274
10275 size = plt_stub_size (htab, stub_entry, off);
10276 if (htab->plt_stub_align)
10277 size += plt_stub_pad (htab, stub_entry, off);
10278 if (info->emitrelocations)
10279 {
10280 stub_entry->stub_sec->reloc_count
10281 += (2
10282 + (PPC_HA (off) != 0)
10283 + (htab->plt_static_chain
10284 && PPC_HA (off + 16) == PPC_HA (off)));
10285 stub_entry->stub_sec->flags |= SEC_RELOC;
10286 }
10287 }
10288 else
10289 {
10290 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10291 variants. */
10292 bfd_vma r2off = 0;
10293
10294 off = (stub_entry->target_value
10295 + stub_entry->target_section->output_offset
10296 + stub_entry->target_section->output_section->vma);
10297 off -= (stub_entry->stub_sec->size
10298 + stub_entry->stub_sec->output_offset
10299 + stub_entry->stub_sec->output_section->vma);
10300
10301 /* Reset the stub type from the plt variant in case we now
10302 can reach with a shorter stub. */
10303 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10304 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10305
10306 size = 4;
10307 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10308 {
10309 r2off = get_r2off (info, stub_entry);
10310 if (r2off == 0)
10311 {
10312 htab->stub_error = TRUE;
10313 return FALSE;
10314 }
10315 size = 12;
10316 if (PPC_HA (r2off) != 0)
10317 size = 16;
10318 off -= size - 4;
10319 }
10320
10321 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10322 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10323 {
10324 struct ppc_branch_hash_entry *br_entry;
10325
10326 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10327 stub_entry->root.string + 9,
10328 TRUE, FALSE);
10329 if (br_entry == NULL)
10330 {
10331 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10332 stub_entry->root.string);
10333 htab->stub_error = TRUE;
10334 return FALSE;
10335 }
10336
10337 if (br_entry->iter != htab->stub_iteration)
10338 {
10339 br_entry->iter = htab->stub_iteration;
10340 br_entry->offset = htab->brlt->size;
10341 htab->brlt->size += 8;
10342
10343 if (htab->relbrlt != NULL)
10344 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10345 else if (info->emitrelocations)
10346 {
10347 htab->brlt->reloc_count += 1;
10348 htab->brlt->flags |= SEC_RELOC;
10349 }
10350 }
10351
10352 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10353 off = (br_entry->offset
10354 + htab->brlt->output_offset
10355 + htab->brlt->output_section->vma
10356 - elf_gp (htab->brlt->output_section->owner)
10357 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10358
10359 if (info->emitrelocations)
10360 {
10361 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10362 stub_entry->stub_sec->flags |= SEC_RELOC;
10363 }
10364
10365 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10366 {
10367 size = 12;
10368 if (PPC_HA (off) != 0)
10369 size = 16;
10370 }
10371 else
10372 {
10373 size = 20;
10374 if (PPC_HA (off) != 0)
10375 size += 4;
10376
10377 if (PPC_HA (r2off) != 0)
10378 size += 4;
10379 }
10380 }
10381 else if (info->emitrelocations)
10382 {
10383 stub_entry->stub_sec->reloc_count += 1;
10384 stub_entry->stub_sec->flags |= SEC_RELOC;
10385 }
10386 }
10387
10388 stub_entry->stub_sec->size += size;
10389 return TRUE;
10390 }
10391
10392 /* Set up various things so that we can make a list of input sections
10393 for each output section included in the link. Returns -1 on error,
10394 0 when no stubs will be needed, and 1 on success. */
10395
10396 int
10397 ppc64_elf_setup_section_lists
10398 (struct bfd_link_info *info,
10399 asection *(*add_stub_section) (const char *, asection *),
10400 void (*layout_sections_again) (void))
10401 {
10402 bfd *input_bfd;
10403 int top_id, top_index, id;
10404 asection *section;
10405 asection **input_list;
10406 bfd_size_type amt;
10407 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10408
10409 if (htab == NULL)
10410 return -1;
10411 /* Stash our params away. */
10412 htab->add_stub_section = add_stub_section;
10413 htab->layout_sections_again = layout_sections_again;
10414
10415 if (htab->brlt == NULL)
10416 return 0;
10417
10418 /* Find the top input section id. */
10419 for (input_bfd = info->input_bfds, top_id = 3;
10420 input_bfd != NULL;
10421 input_bfd = input_bfd->link_next)
10422 {
10423 for (section = input_bfd->sections;
10424 section != NULL;
10425 section = section->next)
10426 {
10427 if (top_id < section->id)
10428 top_id = section->id;
10429 }
10430 }
10431
10432 htab->top_id = top_id;
10433 amt = sizeof (struct map_stub) * (top_id + 1);
10434 htab->stub_group = bfd_zmalloc (amt);
10435 if (htab->stub_group == NULL)
10436 return -1;
10437
10438 /* Set toc_off for com, und, abs and ind sections. */
10439 for (id = 0; id < 3; id++)
10440 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10441
10442 /* We can't use output_bfd->section_count here to find the top output
10443 section index as some sections may have been removed, and
10444 strip_excluded_output_sections doesn't renumber the indices. */
10445 for (section = info->output_bfd->sections, top_index = 0;
10446 section != NULL;
10447 section = section->next)
10448 {
10449 if (top_index < section->index)
10450 top_index = section->index;
10451 }
10452
10453 htab->top_index = top_index;
10454 amt = sizeof (asection *) * (top_index + 1);
10455 input_list = bfd_zmalloc (amt);
10456 htab->input_list = input_list;
10457 if (input_list == NULL)
10458 return -1;
10459
10460 return 1;
10461 }
10462
10463 /* Set up for first pass at multitoc partitioning. */
10464
10465 void
10466 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10467 {
10468 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10469
10470 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10471 htab->toc_curr = elf_gp (info->output_bfd);
10472 htab->toc_bfd = NULL;
10473 htab->toc_first_sec = NULL;
10474 }
10475
10476 /* The linker repeatedly calls this function for each TOC input section
10477 and linker generated GOT section. Group input bfds such that the toc
10478 within a group is less than 64k in size. */
10479
10480 bfd_boolean
10481 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10482 {
10483 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10484 bfd_vma addr, off, limit;
10485
10486 if (htab == NULL)
10487 return FALSE;
10488
10489 if (!htab->second_toc_pass)
10490 {
10491 /* Keep track of the first .toc or .got section for this input bfd. */
10492 if (htab->toc_bfd != isec->owner)
10493 {
10494 htab->toc_bfd = isec->owner;
10495 htab->toc_first_sec = isec;
10496 }
10497
10498 addr = isec->output_offset + isec->output_section->vma;
10499 off = addr - htab->toc_curr;
10500 limit = 0x80008000;
10501 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10502 limit = 0x10000;
10503 if (off + isec->size > limit)
10504 {
10505 addr = (htab->toc_first_sec->output_offset
10506 + htab->toc_first_sec->output_section->vma);
10507 htab->toc_curr = addr;
10508 }
10509
10510 /* toc_curr is the base address of this toc group. Set elf_gp
10511 for the input section to be the offset relative to the
10512 output toc base plus 0x8000. Making the input elf_gp an
10513 offset allows us to move the toc as a whole without
10514 recalculating input elf_gp. */
10515 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10516 off += TOC_BASE_OFF;
10517
10518 /* Die if someone uses a linker script that doesn't keep input
10519 file .toc and .got together. */
10520 if (elf_gp (isec->owner) != 0
10521 && elf_gp (isec->owner) != off)
10522 return FALSE;
10523
10524 elf_gp (isec->owner) = off;
10525 return TRUE;
10526 }
10527
10528 /* During the second pass toc_first_sec points to the start of
10529 a toc group, and toc_curr is used to track the old elf_gp.
10530 We use toc_bfd to ensure we only look at each bfd once. */
10531 if (htab->toc_bfd == isec->owner)
10532 return TRUE;
10533 htab->toc_bfd = isec->owner;
10534
10535 if (htab->toc_first_sec == NULL
10536 || htab->toc_curr != elf_gp (isec->owner))
10537 {
10538 htab->toc_curr = elf_gp (isec->owner);
10539 htab->toc_first_sec = isec;
10540 }
10541 addr = (htab->toc_first_sec->output_offset
10542 + htab->toc_first_sec->output_section->vma);
10543 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10544 elf_gp (isec->owner) = off;
10545
10546 return TRUE;
10547 }
10548
10549 /* Called via elf_link_hash_traverse to merge GOT entries for global
10550 symbol H. */
10551
10552 static bfd_boolean
10553 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10554 {
10555 if (h->root.type == bfd_link_hash_indirect)
10556 return TRUE;
10557
10558 merge_got_entries (&h->got.glist);
10559
10560 return TRUE;
10561 }
10562
10563 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10564 symbol H. */
10565
10566 static bfd_boolean
10567 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10568 {
10569 struct got_entry *gent;
10570
10571 if (h->root.type == bfd_link_hash_indirect)
10572 return TRUE;
10573
10574 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10575 if (!gent->is_indirect)
10576 allocate_got (h, (struct bfd_link_info *) inf, gent);
10577 return TRUE;
10578 }
10579
10580 /* Called on the first multitoc pass after the last call to
10581 ppc64_elf_next_toc_section. This function removes duplicate GOT
10582 entries. */
10583
10584 bfd_boolean
10585 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10586 {
10587 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10588 struct bfd *ibfd, *ibfd2;
10589 bfd_boolean done_something;
10590
10591 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10592
10593 if (!htab->do_multi_toc)
10594 return FALSE;
10595
10596 /* Merge global sym got entries within a toc group. */
10597 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10598
10599 /* And tlsld_got. */
10600 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10601 {
10602 struct got_entry *ent, *ent2;
10603
10604 if (!is_ppc64_elf (ibfd))
10605 continue;
10606
10607 ent = ppc64_tlsld_got (ibfd);
10608 if (!ent->is_indirect
10609 && ent->got.offset != (bfd_vma) -1)
10610 {
10611 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10612 {
10613 if (!is_ppc64_elf (ibfd2))
10614 continue;
10615
10616 ent2 = ppc64_tlsld_got (ibfd2);
10617 if (!ent2->is_indirect
10618 && ent2->got.offset != (bfd_vma) -1
10619 && elf_gp (ibfd2) == elf_gp (ibfd))
10620 {
10621 ent2->is_indirect = TRUE;
10622 ent2->got.ent = ent;
10623 }
10624 }
10625 }
10626 }
10627
10628 /* Zap sizes of got sections. */
10629 htab->reliplt->rawsize = htab->reliplt->size;
10630 htab->reliplt->size -= htab->got_reli_size;
10631 htab->got_reli_size = 0;
10632
10633 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10634 {
10635 asection *got, *relgot;
10636
10637 if (!is_ppc64_elf (ibfd))
10638 continue;
10639
10640 got = ppc64_elf_tdata (ibfd)->got;
10641 if (got != NULL)
10642 {
10643 got->rawsize = got->size;
10644 got->size = 0;
10645 relgot = ppc64_elf_tdata (ibfd)->relgot;
10646 relgot->rawsize = relgot->size;
10647 relgot->size = 0;
10648 }
10649 }
10650
10651 /* Now reallocate the got, local syms first. We don't need to
10652 allocate section contents again since we never increase size. */
10653 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10654 {
10655 struct got_entry **lgot_ents;
10656 struct got_entry **end_lgot_ents;
10657 struct plt_entry **local_plt;
10658 struct plt_entry **end_local_plt;
10659 unsigned char *lgot_masks;
10660 bfd_size_type locsymcount;
10661 Elf_Internal_Shdr *symtab_hdr;
10662 asection *s, *srel;
10663
10664 if (!is_ppc64_elf (ibfd))
10665 continue;
10666
10667 lgot_ents = elf_local_got_ents (ibfd);
10668 if (!lgot_ents)
10669 continue;
10670
10671 symtab_hdr = &elf_symtab_hdr (ibfd);
10672 locsymcount = symtab_hdr->sh_info;
10673 end_lgot_ents = lgot_ents + locsymcount;
10674 local_plt = (struct plt_entry **) end_lgot_ents;
10675 end_local_plt = local_plt + locsymcount;
10676 lgot_masks = (unsigned char *) end_local_plt;
10677 s = ppc64_elf_tdata (ibfd)->got;
10678 srel = ppc64_elf_tdata (ibfd)->relgot;
10679 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10680 {
10681 struct got_entry *ent;
10682
10683 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10684 {
10685 unsigned int num = 1;
10686 ent->got.offset = s->size;
10687 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10688 num = 2;
10689 s->size += num * 8;
10690 if (info->shared)
10691 srel->size += num * sizeof (Elf64_External_Rela);
10692 else if ((*lgot_masks & PLT_IFUNC) != 0)
10693 {
10694 htab->reliplt->size
10695 += num * sizeof (Elf64_External_Rela);
10696 htab->got_reli_size
10697 += num * sizeof (Elf64_External_Rela);
10698 }
10699 }
10700 }
10701 }
10702
10703 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10704
10705 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10706 {
10707 struct got_entry *ent;
10708
10709 if (!is_ppc64_elf (ibfd))
10710 continue;
10711
10712 ent = ppc64_tlsld_got (ibfd);
10713 if (!ent->is_indirect
10714 && ent->got.offset != (bfd_vma) -1)
10715 {
10716 asection *s = ppc64_elf_tdata (ibfd)->got;
10717 ent->got.offset = s->size;
10718 s->size += 16;
10719 if (info->shared)
10720 {
10721 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10722 srel->size += sizeof (Elf64_External_Rela);
10723 }
10724 }
10725 }
10726
10727 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10728 if (!done_something)
10729 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10730 {
10731 asection *got;
10732
10733 if (!is_ppc64_elf (ibfd))
10734 continue;
10735
10736 got = ppc64_elf_tdata (ibfd)->got;
10737 if (got != NULL)
10738 {
10739 done_something = got->rawsize != got->size;
10740 if (done_something)
10741 break;
10742 }
10743 }
10744
10745 if (done_something)
10746 (*htab->layout_sections_again) ();
10747
10748 /* Set up for second pass over toc sections to recalculate elf_gp
10749 on input sections. */
10750 htab->toc_bfd = NULL;
10751 htab->toc_first_sec = NULL;
10752 htab->second_toc_pass = TRUE;
10753 return done_something;
10754 }
10755
10756 /* Called after second pass of multitoc partitioning. */
10757
10758 void
10759 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10760 {
10761 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10762
10763 /* After the second pass, toc_curr tracks the TOC offset used
10764 for code sections below in ppc64_elf_next_input_section. */
10765 htab->toc_curr = TOC_BASE_OFF;
10766 }
10767
10768 /* No toc references were found in ISEC. If the code in ISEC makes no
10769 calls, then there's no need to use toc adjusting stubs when branching
10770 into ISEC. Actually, indirect calls from ISEC are OK as they will
10771 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10772 needed, and 2 if a cyclical call-graph was found but no other reason
10773 for a stub was detected. If called from the top level, a return of
10774 2 means the same as a return of 0. */
10775
10776 static int
10777 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10778 {
10779 int ret;
10780
10781 /* Mark this section as checked. */
10782 isec->call_check_done = 1;
10783
10784 /* We know none of our code bearing sections will need toc stubs. */
10785 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10786 return 0;
10787
10788 if (isec->size == 0)
10789 return 0;
10790
10791 if (isec->output_section == NULL)
10792 return 0;
10793
10794 ret = 0;
10795 if (isec->reloc_count != 0)
10796 {
10797 Elf_Internal_Rela *relstart, *rel;
10798 Elf_Internal_Sym *local_syms;
10799 struct ppc_link_hash_table *htab;
10800
10801 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10802 info->keep_memory);
10803 if (relstart == NULL)
10804 return -1;
10805
10806 /* Look for branches to outside of this section. */
10807 local_syms = NULL;
10808 htab = ppc_hash_table (info);
10809 if (htab == NULL)
10810 return -1;
10811
10812 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10813 {
10814 enum elf_ppc64_reloc_type r_type;
10815 unsigned long r_symndx;
10816 struct elf_link_hash_entry *h;
10817 struct ppc_link_hash_entry *eh;
10818 Elf_Internal_Sym *sym;
10819 asection *sym_sec;
10820 struct _opd_sec_data *opd;
10821 bfd_vma sym_value;
10822 bfd_vma dest;
10823
10824 r_type = ELF64_R_TYPE (rel->r_info);
10825 if (r_type != R_PPC64_REL24
10826 && r_type != R_PPC64_REL14
10827 && r_type != R_PPC64_REL14_BRTAKEN
10828 && r_type != R_PPC64_REL14_BRNTAKEN)
10829 continue;
10830
10831 r_symndx = ELF64_R_SYM (rel->r_info);
10832 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10833 isec->owner))
10834 {
10835 ret = -1;
10836 break;
10837 }
10838
10839 /* Calls to dynamic lib functions go through a plt call stub
10840 that uses r2. */
10841 eh = (struct ppc_link_hash_entry *) h;
10842 if (eh != NULL
10843 && (eh->elf.plt.plist != NULL
10844 || (eh->oh != NULL
10845 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10846 {
10847 ret = 1;
10848 break;
10849 }
10850
10851 if (sym_sec == NULL)
10852 /* Ignore other undefined symbols. */
10853 continue;
10854
10855 /* Assume branches to other sections not included in the
10856 link need stubs too, to cover -R and absolute syms. */
10857 if (sym_sec->output_section == NULL)
10858 {
10859 ret = 1;
10860 break;
10861 }
10862
10863 if (h == NULL)
10864 sym_value = sym->st_value;
10865 else
10866 {
10867 if (h->root.type != bfd_link_hash_defined
10868 && h->root.type != bfd_link_hash_defweak)
10869 abort ();
10870 sym_value = h->root.u.def.value;
10871 }
10872 sym_value += rel->r_addend;
10873
10874 /* If this branch reloc uses an opd sym, find the code section. */
10875 opd = get_opd_info (sym_sec);
10876 if (opd != NULL)
10877 {
10878 if (h == NULL && opd->adjust != NULL)
10879 {
10880 long adjust;
10881
10882 adjust = opd->adjust[sym->st_value / 8];
10883 if (adjust == -1)
10884 /* Assume deleted functions won't ever be called. */
10885 continue;
10886 sym_value += adjust;
10887 }
10888
10889 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10890 if (dest == (bfd_vma) -1)
10891 continue;
10892 }
10893 else
10894 dest = (sym_value
10895 + sym_sec->output_offset
10896 + sym_sec->output_section->vma);
10897
10898 /* Ignore branch to self. */
10899 if (sym_sec == isec)
10900 continue;
10901
10902 /* If the called function uses the toc, we need a stub. */
10903 if (sym_sec->has_toc_reloc
10904 || sym_sec->makes_toc_func_call)
10905 {
10906 ret = 1;
10907 break;
10908 }
10909
10910 /* Assume any branch that needs a long branch stub might in fact
10911 need a plt_branch stub. A plt_branch stub uses r2. */
10912 else if (dest - (isec->output_offset
10913 + isec->output_section->vma
10914 + rel->r_offset) + (1 << 25) >= (2 << 25))
10915 {
10916 ret = 1;
10917 break;
10918 }
10919
10920 /* If calling back to a section in the process of being
10921 tested, we can't say for sure that no toc adjusting stubs
10922 are needed, so don't return zero. */
10923 else if (sym_sec->call_check_in_progress)
10924 ret = 2;
10925
10926 /* Branches to another section that itself doesn't have any TOC
10927 references are OK. Recursively call ourselves to check. */
10928 else if (!sym_sec->call_check_done)
10929 {
10930 int recur;
10931
10932 /* Mark current section as indeterminate, so that other
10933 sections that call back to current won't be marked as
10934 known. */
10935 isec->call_check_in_progress = 1;
10936 recur = toc_adjusting_stub_needed (info, sym_sec);
10937 isec->call_check_in_progress = 0;
10938
10939 if (recur != 0)
10940 {
10941 ret = recur;
10942 if (recur != 2)
10943 break;
10944 }
10945 }
10946 }
10947
10948 if (local_syms != NULL
10949 && (elf_symtab_hdr (isec->owner).contents
10950 != (unsigned char *) local_syms))
10951 free (local_syms);
10952 if (elf_section_data (isec)->relocs != relstart)
10953 free (relstart);
10954 }
10955
10956 if ((ret & 1) == 0
10957 && isec->map_head.s != NULL
10958 && (strcmp (isec->output_section->name, ".init") == 0
10959 || strcmp (isec->output_section->name, ".fini") == 0))
10960 {
10961 if (isec->map_head.s->has_toc_reloc
10962 || isec->map_head.s->makes_toc_func_call)
10963 ret = 1;
10964 else if (!isec->map_head.s->call_check_done)
10965 {
10966 int recur;
10967 isec->call_check_in_progress = 1;
10968 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10969 isec->call_check_in_progress = 0;
10970 if (recur != 0)
10971 ret = recur;
10972 }
10973 }
10974
10975 if (ret == 1)
10976 isec->makes_toc_func_call = 1;
10977
10978 return ret;
10979 }
10980
10981 /* The linker repeatedly calls this function for each input section,
10982 in the order that input sections are linked into output sections.
10983 Build lists of input sections to determine groupings between which
10984 we may insert linker stubs. */
10985
10986 bfd_boolean
10987 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10988 {
10989 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10990
10991 if (htab == NULL)
10992 return FALSE;
10993
10994 if ((isec->output_section->flags & SEC_CODE) != 0
10995 && isec->output_section->index <= htab->top_index)
10996 {
10997 asection **list = htab->input_list + isec->output_section->index;
10998 /* Steal the link_sec pointer for our list. */
10999 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11000 /* This happens to make the list in reverse order,
11001 which is what we want. */
11002 PREV_SEC (isec) = *list;
11003 *list = isec;
11004 }
11005
11006 if (htab->multi_toc_needed)
11007 {
11008 /* If a code section has a function that uses the TOC then we need
11009 to use the right TOC (obviously). Also, make sure that .opd gets
11010 the correct TOC value for R_PPC64_TOC relocs that don't have or
11011 can't find their function symbol (shouldn't ever happen now).
11012 Also specially treat .fixup for the linux kernel. .fixup
11013 contains branches, but only back to the function that hit an
11014 exception. */
11015 if (isec->has_toc_reloc
11016 || (isec->flags & SEC_CODE) == 0
11017 || strcmp (isec->name, ".fixup") == 0)
11018 {
11019 if (elf_gp (isec->owner) != 0)
11020 htab->toc_curr = elf_gp (isec->owner);
11021 }
11022 else
11023 {
11024 if (!isec->call_check_done
11025 && toc_adjusting_stub_needed (info, isec) < 0)
11026 return FALSE;
11027 /* If we make a local call from this section, ie. a branch
11028 without a following nop, then we have no place to put a
11029 toc restoring insn. We must use the same toc group as
11030 the callee.
11031 Testing makes_toc_func_call actually tests for *any*
11032 calls to functions that need a good toc pointer. A more
11033 precise test would be better, as this one will set
11034 incorrect values for pasted .init/.fini fragments.
11035 (Fixed later in check_pasted_section.) */
11036 if (isec->makes_toc_func_call
11037 && elf_gp (isec->owner) != 0)
11038 htab->toc_curr = elf_gp (isec->owner);
11039 }
11040 }
11041
11042 /* Functions that don't use the TOC can belong in any TOC group.
11043 Use the last TOC base. */
11044 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11045 return TRUE;
11046 }
11047
11048 /* Check that all .init and .fini sections use the same toc, if they
11049 have toc relocs. */
11050
11051 static bfd_boolean
11052 check_pasted_section (struct bfd_link_info *info, const char *name)
11053 {
11054 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11055
11056 if (o != NULL)
11057 {
11058 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11059 bfd_vma toc_off = 0;
11060 asection *i;
11061
11062 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11063 if (i->has_toc_reloc)
11064 {
11065 if (toc_off == 0)
11066 toc_off = htab->stub_group[i->id].toc_off;
11067 else if (toc_off != htab->stub_group[i->id].toc_off)
11068 return FALSE;
11069 }
11070
11071 if (toc_off == 0)
11072 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11073 if (i->makes_toc_func_call)
11074 {
11075 toc_off = htab->stub_group[i->id].toc_off;
11076 break;
11077 }
11078
11079 /* Make sure the whole pasted function uses the same toc offset. */
11080 if (toc_off != 0)
11081 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11082 htab->stub_group[i->id].toc_off = toc_off;
11083 }
11084 return TRUE;
11085 }
11086
11087 bfd_boolean
11088 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11089 {
11090 return (check_pasted_section (info, ".init")
11091 & check_pasted_section (info, ".fini"));
11092 }
11093
11094 /* See whether we can group stub sections together. Grouping stub
11095 sections may result in fewer stubs. More importantly, we need to
11096 put all .init* and .fini* stubs at the beginning of the .init or
11097 .fini output sections respectively, because glibc splits the
11098 _init and _fini functions into multiple parts. Putting a stub in
11099 the middle of a function is not a good idea. */
11100
11101 static void
11102 group_sections (struct ppc_link_hash_table *htab,
11103 bfd_size_type stub_group_size,
11104 bfd_boolean stubs_always_before_branch)
11105 {
11106 asection **list;
11107 bfd_size_type stub14_group_size;
11108 bfd_boolean suppress_size_errors;
11109
11110 suppress_size_errors = FALSE;
11111 stub14_group_size = stub_group_size;
11112 if (stub_group_size == 1)
11113 {
11114 /* Default values. */
11115 if (stubs_always_before_branch)
11116 {
11117 stub_group_size = 0x1e00000;
11118 stub14_group_size = 0x7800;
11119 }
11120 else
11121 {
11122 stub_group_size = 0x1c00000;
11123 stub14_group_size = 0x7000;
11124 }
11125 suppress_size_errors = TRUE;
11126 }
11127
11128 list = htab->input_list + htab->top_index;
11129 do
11130 {
11131 asection *tail = *list;
11132 while (tail != NULL)
11133 {
11134 asection *curr;
11135 asection *prev;
11136 bfd_size_type total;
11137 bfd_boolean big_sec;
11138 bfd_vma curr_toc;
11139
11140 curr = tail;
11141 total = tail->size;
11142 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11143 && ppc64_elf_section_data (tail)->has_14bit_branch
11144 ? stub14_group_size : stub_group_size);
11145 if (big_sec && !suppress_size_errors)
11146 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11147 tail->owner, tail);
11148 curr_toc = htab->stub_group[tail->id].toc_off;
11149
11150 while ((prev = PREV_SEC (curr)) != NULL
11151 && ((total += curr->output_offset - prev->output_offset)
11152 < (ppc64_elf_section_data (prev) != NULL
11153 && ppc64_elf_section_data (prev)->has_14bit_branch
11154 ? stub14_group_size : stub_group_size))
11155 && htab->stub_group[prev->id].toc_off == curr_toc)
11156 curr = prev;
11157
11158 /* OK, the size from the start of CURR to the end is less
11159 than stub_group_size and thus can be handled by one stub
11160 section. (or the tail section is itself larger than
11161 stub_group_size, in which case we may be toast.) We
11162 should really be keeping track of the total size of stubs
11163 added here, as stubs contribute to the final output
11164 section size. That's a little tricky, and this way will
11165 only break if stubs added make the total size more than
11166 2^25, ie. for the default stub_group_size, if stubs total
11167 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11168 do
11169 {
11170 prev = PREV_SEC (tail);
11171 /* Set up this stub group. */
11172 htab->stub_group[tail->id].link_sec = curr;
11173 }
11174 while (tail != curr && (tail = prev) != NULL);
11175
11176 /* But wait, there's more! Input sections up to stub_group_size
11177 bytes before the stub section can be handled by it too.
11178 Don't do this if we have a really large section after the
11179 stubs, as adding more stubs increases the chance that
11180 branches may not reach into the stub section. */
11181 if (!stubs_always_before_branch && !big_sec)
11182 {
11183 total = 0;
11184 while (prev != NULL
11185 && ((total += tail->output_offset - prev->output_offset)
11186 < (ppc64_elf_section_data (prev) != NULL
11187 && ppc64_elf_section_data (prev)->has_14bit_branch
11188 ? stub14_group_size : stub_group_size))
11189 && htab->stub_group[prev->id].toc_off == curr_toc)
11190 {
11191 tail = prev;
11192 prev = PREV_SEC (tail);
11193 htab->stub_group[tail->id].link_sec = curr;
11194 }
11195 }
11196 tail = prev;
11197 }
11198 }
11199 while (list-- != htab->input_list);
11200 free (htab->input_list);
11201 #undef PREV_SEC
11202 }
11203
11204 static const unsigned char glink_eh_frame_cie[] =
11205 {
11206 0, 0, 0, 16, /* length. */
11207 0, 0, 0, 0, /* id. */
11208 1, /* CIE version. */
11209 'z', 'R', 0, /* Augmentation string. */
11210 4, /* Code alignment. */
11211 0x78, /* Data alignment. */
11212 65, /* RA reg. */
11213 1, /* Augmentation size. */
11214 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11215 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11216 };
11217
11218 /* Stripping output sections is normally done before dynamic section
11219 symbols have been allocated. This function is called later, and
11220 handles cases like htab->brlt which is mapped to its own output
11221 section. */
11222
11223 static void
11224 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11225 {
11226 if (isec->size == 0
11227 && isec->output_section->size == 0
11228 && !bfd_section_removed_from_list (info->output_bfd,
11229 isec->output_section)
11230 && elf_section_data (isec->output_section)->dynindx == 0)
11231 {
11232 isec->output_section->flags |= SEC_EXCLUDE;
11233 bfd_section_list_remove (info->output_bfd, isec->output_section);
11234 info->output_bfd->section_count--;
11235 }
11236 }
11237
11238 /* Determine and set the size of the stub section for a final link.
11239
11240 The basic idea here is to examine all the relocations looking for
11241 PC-relative calls to a target that is unreachable with a "bl"
11242 instruction. */
11243
11244 bfd_boolean
11245 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11246 bfd_boolean plt_static_chain, int plt_thread_safe,
11247 int plt_stub_align)
11248 {
11249 bfd_size_type stub_group_size;
11250 bfd_boolean stubs_always_before_branch;
11251 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11252
11253 if (htab == NULL)
11254 return FALSE;
11255
11256 htab->plt_static_chain = plt_static_chain;
11257 htab->plt_stub_align = plt_stub_align;
11258 if (plt_thread_safe == -1)
11259 {
11260 const char *const thread_starter[] =
11261 {
11262 "pthread_create",
11263 /* libstdc++ */
11264 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11265 /* librt */
11266 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11267 "mq_notify", "create_timer",
11268 /* libanl */
11269 "getaddrinfo_a",
11270 /* libgomp */
11271 "GOMP_parallel_start",
11272 "GOMP_parallel_loop_static_start",
11273 "GOMP_parallel_loop_dynamic_start",
11274 "GOMP_parallel_loop_guided_start",
11275 "GOMP_parallel_loop_runtime_start",
11276 "GOMP_parallel_sections_start",
11277 };
11278 unsigned i;
11279
11280 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11281 {
11282 struct elf_link_hash_entry *h;
11283 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11284 FALSE, FALSE, TRUE);
11285 plt_thread_safe = h != NULL && h->ref_regular;
11286 if (plt_thread_safe)
11287 break;
11288 }
11289 }
11290 htab->plt_thread_safe = plt_thread_safe;
11291 stubs_always_before_branch = group_size < 0;
11292 if (group_size < 0)
11293 stub_group_size = -group_size;
11294 else
11295 stub_group_size = group_size;
11296
11297 group_sections (htab, stub_group_size, stubs_always_before_branch);
11298
11299 while (1)
11300 {
11301 bfd *input_bfd;
11302 unsigned int bfd_indx;
11303 asection *stub_sec;
11304
11305 htab->stub_iteration += 1;
11306
11307 for (input_bfd = info->input_bfds, bfd_indx = 0;
11308 input_bfd != NULL;
11309 input_bfd = input_bfd->link_next, bfd_indx++)
11310 {
11311 Elf_Internal_Shdr *symtab_hdr;
11312 asection *section;
11313 Elf_Internal_Sym *local_syms = NULL;
11314
11315 if (!is_ppc64_elf (input_bfd))
11316 continue;
11317
11318 /* We'll need the symbol table in a second. */
11319 symtab_hdr = &elf_symtab_hdr (input_bfd);
11320 if (symtab_hdr->sh_info == 0)
11321 continue;
11322
11323 /* Walk over each section attached to the input bfd. */
11324 for (section = input_bfd->sections;
11325 section != NULL;
11326 section = section->next)
11327 {
11328 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11329
11330 /* If there aren't any relocs, then there's nothing more
11331 to do. */
11332 if ((section->flags & SEC_RELOC) == 0
11333 || (section->flags & SEC_ALLOC) == 0
11334 || (section->flags & SEC_LOAD) == 0
11335 || (section->flags & SEC_CODE) == 0
11336 || section->reloc_count == 0)
11337 continue;
11338
11339 /* If this section is a link-once section that will be
11340 discarded, then don't create any stubs. */
11341 if (section->output_section == NULL
11342 || section->output_section->owner != info->output_bfd)
11343 continue;
11344
11345 /* Get the relocs. */
11346 internal_relocs
11347 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11348 info->keep_memory);
11349 if (internal_relocs == NULL)
11350 goto error_ret_free_local;
11351
11352 /* Now examine each relocation. */
11353 irela = internal_relocs;
11354 irelaend = irela + section->reloc_count;
11355 for (; irela < irelaend; irela++)
11356 {
11357 enum elf_ppc64_reloc_type r_type;
11358 unsigned int r_indx;
11359 enum ppc_stub_type stub_type;
11360 struct ppc_stub_hash_entry *stub_entry;
11361 asection *sym_sec, *code_sec;
11362 bfd_vma sym_value, code_value;
11363 bfd_vma destination;
11364 bfd_boolean ok_dest;
11365 struct ppc_link_hash_entry *hash;
11366 struct ppc_link_hash_entry *fdh;
11367 struct elf_link_hash_entry *h;
11368 Elf_Internal_Sym *sym;
11369 char *stub_name;
11370 const asection *id_sec;
11371 struct _opd_sec_data *opd;
11372 struct plt_entry *plt_ent;
11373
11374 r_type = ELF64_R_TYPE (irela->r_info);
11375 r_indx = ELF64_R_SYM (irela->r_info);
11376
11377 if (r_type >= R_PPC64_max)
11378 {
11379 bfd_set_error (bfd_error_bad_value);
11380 goto error_ret_free_internal;
11381 }
11382
11383 /* Only look for stubs on branch instructions. */
11384 if (r_type != R_PPC64_REL24
11385 && r_type != R_PPC64_REL14
11386 && r_type != R_PPC64_REL14_BRTAKEN
11387 && r_type != R_PPC64_REL14_BRNTAKEN)
11388 continue;
11389
11390 /* Now determine the call target, its name, value,
11391 section. */
11392 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11393 r_indx, input_bfd))
11394 goto error_ret_free_internal;
11395 hash = (struct ppc_link_hash_entry *) h;
11396
11397 ok_dest = FALSE;
11398 fdh = NULL;
11399 sym_value = 0;
11400 if (hash == NULL)
11401 {
11402 sym_value = sym->st_value;
11403 ok_dest = TRUE;
11404 }
11405 else if (hash->elf.root.type == bfd_link_hash_defined
11406 || hash->elf.root.type == bfd_link_hash_defweak)
11407 {
11408 sym_value = hash->elf.root.u.def.value;
11409 if (sym_sec->output_section != NULL)
11410 ok_dest = TRUE;
11411 }
11412 else if (hash->elf.root.type == bfd_link_hash_undefweak
11413 || hash->elf.root.type == bfd_link_hash_undefined)
11414 {
11415 /* Recognise an old ABI func code entry sym, and
11416 use the func descriptor sym instead if it is
11417 defined. */
11418 if (hash->elf.root.root.string[0] == '.'
11419 && (fdh = lookup_fdh (hash, htab)) != NULL)
11420 {
11421 if (fdh->elf.root.type == bfd_link_hash_defined
11422 || fdh->elf.root.type == bfd_link_hash_defweak)
11423 {
11424 sym_sec = fdh->elf.root.u.def.section;
11425 sym_value = fdh->elf.root.u.def.value;
11426 if (sym_sec->output_section != NULL)
11427 ok_dest = TRUE;
11428 }
11429 else
11430 fdh = NULL;
11431 }
11432 }
11433 else
11434 {
11435 bfd_set_error (bfd_error_bad_value);
11436 goto error_ret_free_internal;
11437 }
11438
11439 destination = 0;
11440 if (ok_dest)
11441 {
11442 sym_value += irela->r_addend;
11443 destination = (sym_value
11444 + sym_sec->output_offset
11445 + sym_sec->output_section->vma);
11446 }
11447
11448 code_sec = sym_sec;
11449 code_value = sym_value;
11450 opd = get_opd_info (sym_sec);
11451 if (opd != NULL)
11452 {
11453 bfd_vma dest;
11454
11455 if (hash == NULL && opd->adjust != NULL)
11456 {
11457 long adjust = opd->adjust[sym_value / 8];
11458 if (adjust == -1)
11459 continue;
11460 code_value += adjust;
11461 sym_value += adjust;
11462 }
11463 dest = opd_entry_value (sym_sec, sym_value,
11464 &code_sec, &code_value);
11465 if (dest != (bfd_vma) -1)
11466 {
11467 destination = dest;
11468 if (fdh != NULL)
11469 {
11470 /* Fixup old ABI sym to point at code
11471 entry. */
11472 hash->elf.root.type = bfd_link_hash_defweak;
11473 hash->elf.root.u.def.section = code_sec;
11474 hash->elf.root.u.def.value = code_value;
11475 }
11476 }
11477 }
11478
11479 /* Determine what (if any) linker stub is needed. */
11480 plt_ent = NULL;
11481 stub_type = ppc_type_of_stub (section, irela, &hash,
11482 &plt_ent, destination);
11483
11484 if (stub_type != ppc_stub_plt_call)
11485 {
11486 /* Check whether we need a TOC adjusting stub.
11487 Since the linker pastes together pieces from
11488 different object files when creating the
11489 _init and _fini functions, it may be that a
11490 call to what looks like a local sym is in
11491 fact a call needing a TOC adjustment. */
11492 if (code_sec != NULL
11493 && code_sec->output_section != NULL
11494 && (htab->stub_group[code_sec->id].toc_off
11495 != htab->stub_group[section->id].toc_off)
11496 && (code_sec->has_toc_reloc
11497 || code_sec->makes_toc_func_call))
11498 stub_type = ppc_stub_long_branch_r2off;
11499 }
11500
11501 if (stub_type == ppc_stub_none)
11502 continue;
11503
11504 /* __tls_get_addr calls might be eliminated. */
11505 if (stub_type != ppc_stub_plt_call
11506 && hash != NULL
11507 && (hash == htab->tls_get_addr
11508 || hash == htab->tls_get_addr_fd)
11509 && section->has_tls_reloc
11510 && irela != internal_relocs)
11511 {
11512 /* Get tls info. */
11513 unsigned char *tls_mask;
11514
11515 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11516 irela - 1, input_bfd))
11517 goto error_ret_free_internal;
11518 if (*tls_mask != 0)
11519 continue;
11520 }
11521
11522 if (stub_type == ppc_stub_plt_call
11523 && irela + 1 < irelaend
11524 && irela[1].r_offset == irela->r_offset + 4
11525 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11526 {
11527 if (!tocsave_find (htab, INSERT,
11528 &local_syms, irela + 1, input_bfd))
11529 goto error_ret_free_internal;
11530 }
11531 else if (stub_type == ppc_stub_plt_call)
11532 stub_type = ppc_stub_plt_call_r2save;
11533
11534 /* Support for grouping stub sections. */
11535 id_sec = htab->stub_group[section->id].link_sec;
11536
11537 /* Get the name of this stub. */
11538 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11539 if (!stub_name)
11540 goto error_ret_free_internal;
11541
11542 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11543 stub_name, FALSE, FALSE);
11544 if (stub_entry != NULL)
11545 {
11546 /* The proper stub has already been created. */
11547 free (stub_name);
11548 if (stub_type == ppc_stub_plt_call_r2save)
11549 stub_entry->stub_type = stub_type;
11550 continue;
11551 }
11552
11553 stub_entry = ppc_add_stub (stub_name, section, info);
11554 if (stub_entry == NULL)
11555 {
11556 free (stub_name);
11557 error_ret_free_internal:
11558 if (elf_section_data (section)->relocs == NULL)
11559 free (internal_relocs);
11560 error_ret_free_local:
11561 if (local_syms != NULL
11562 && (symtab_hdr->contents
11563 != (unsigned char *) local_syms))
11564 free (local_syms);
11565 return FALSE;
11566 }
11567
11568 stub_entry->stub_type = stub_type;
11569 if (stub_type != ppc_stub_plt_call
11570 && stub_type != ppc_stub_plt_call_r2save)
11571 {
11572 stub_entry->target_value = code_value;
11573 stub_entry->target_section = code_sec;
11574 }
11575 else
11576 {
11577 stub_entry->target_value = sym_value;
11578 stub_entry->target_section = sym_sec;
11579 }
11580 stub_entry->h = hash;
11581 stub_entry->plt_ent = plt_ent;
11582 stub_entry->addend = irela->r_addend;
11583
11584 if (stub_entry->h != NULL)
11585 htab->stub_globals += 1;
11586 }
11587
11588 /* We're done with the internal relocs, free them. */
11589 if (elf_section_data (section)->relocs != internal_relocs)
11590 free (internal_relocs);
11591 }
11592
11593 if (local_syms != NULL
11594 && symtab_hdr->contents != (unsigned char *) local_syms)
11595 {
11596 if (!info->keep_memory)
11597 free (local_syms);
11598 else
11599 symtab_hdr->contents = (unsigned char *) local_syms;
11600 }
11601 }
11602
11603 /* We may have added some stubs. Find out the new size of the
11604 stub sections. */
11605 for (stub_sec = htab->stub_bfd->sections;
11606 stub_sec != NULL;
11607 stub_sec = stub_sec->next)
11608 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11609 {
11610 stub_sec->rawsize = stub_sec->size;
11611 stub_sec->size = 0;
11612 stub_sec->reloc_count = 0;
11613 stub_sec->flags &= ~SEC_RELOC;
11614 }
11615
11616 htab->brlt->size = 0;
11617 htab->brlt->reloc_count = 0;
11618 htab->brlt->flags &= ~SEC_RELOC;
11619 if (htab->relbrlt != NULL)
11620 htab->relbrlt->size = 0;
11621
11622 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11623
11624 if (info->emitrelocations
11625 && htab->glink != NULL && htab->glink->size != 0)
11626 {
11627 htab->glink->reloc_count = 1;
11628 htab->glink->flags |= SEC_RELOC;
11629 }
11630
11631 if (htab->glink_eh_frame != NULL
11632 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11633 && (htab->glink_eh_frame->flags & SEC_EXCLUDE) == 0)
11634 {
11635 bfd_size_type size = 0;
11636
11637 for (stub_sec = htab->stub_bfd->sections;
11638 stub_sec != NULL;
11639 stub_sec = stub_sec->next)
11640 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11641 size += 20;
11642 if (htab->glink != NULL && htab->glink->size != 0)
11643 size += 24;
11644 if (size != 0)
11645 size += sizeof (glink_eh_frame_cie);
11646 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11647 htab->glink_eh_frame->size = size;
11648 }
11649
11650 if (htab->plt_stub_align != 0)
11651 for (stub_sec = htab->stub_bfd->sections;
11652 stub_sec != NULL;
11653 stub_sec = stub_sec->next)
11654 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11655 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11656 & (-1 << htab->plt_stub_align));
11657
11658 for (stub_sec = htab->stub_bfd->sections;
11659 stub_sec != NULL;
11660 stub_sec = stub_sec->next)
11661 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11662 && stub_sec->rawsize != stub_sec->size)
11663 break;
11664
11665 /* Exit from this loop when no stubs have been added, and no stubs
11666 have changed size. */
11667 if (stub_sec == NULL
11668 && (htab->glink_eh_frame == NULL
11669 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11670 break;
11671
11672 /* Ask the linker to do its stuff. */
11673 (*htab->layout_sections_again) ();
11674 }
11675
11676 maybe_strip_output (info, htab->brlt);
11677 if (htab->glink_eh_frame != NULL)
11678 maybe_strip_output (info, htab->glink_eh_frame);
11679
11680 return TRUE;
11681 }
11682
11683 /* Called after we have determined section placement. If sections
11684 move, we'll be called again. Provide a value for TOCstart. */
11685
11686 bfd_vma
11687 ppc64_elf_toc (bfd *obfd)
11688 {
11689 asection *s;
11690 bfd_vma TOCstart;
11691
11692 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11693 order. The TOC starts where the first of these sections starts. */
11694 s = bfd_get_section_by_name (obfd, ".got");
11695 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11696 s = bfd_get_section_by_name (obfd, ".toc");
11697 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11698 s = bfd_get_section_by_name (obfd, ".tocbss");
11699 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11700 s = bfd_get_section_by_name (obfd, ".plt");
11701 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11702 {
11703 /* This may happen for
11704 o references to TOC base (SYM@toc / TOC[tc0]) without a
11705 .toc directive
11706 o bad linker script
11707 o --gc-sections and empty TOC sections
11708
11709 FIXME: Warn user? */
11710
11711 /* Look for a likely section. We probably won't even be
11712 using TOCstart. */
11713 for (s = obfd->sections; s != NULL; s = s->next)
11714 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11715 | SEC_EXCLUDE))
11716 == (SEC_ALLOC | SEC_SMALL_DATA))
11717 break;
11718 if (s == NULL)
11719 for (s = obfd->sections; s != NULL; s = s->next)
11720 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11721 == (SEC_ALLOC | SEC_SMALL_DATA))
11722 break;
11723 if (s == NULL)
11724 for (s = obfd->sections; s != NULL; s = s->next)
11725 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11726 == SEC_ALLOC)
11727 break;
11728 if (s == NULL)
11729 for (s = obfd->sections; s != NULL; s = s->next)
11730 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11731 break;
11732 }
11733
11734 TOCstart = 0;
11735 if (s != NULL)
11736 TOCstart = s->output_section->vma + s->output_offset;
11737
11738 return TOCstart;
11739 }
11740
11741 /* Build all the stubs associated with the current output file.
11742 The stubs are kept in a hash table attached to the main linker
11743 hash table. This function is called via gldelf64ppc_finish. */
11744
11745 bfd_boolean
11746 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11747 struct bfd_link_info *info,
11748 char **stats)
11749 {
11750 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11751 asection *stub_sec;
11752 bfd_byte *p;
11753 int stub_sec_count = 0;
11754
11755 if (htab == NULL)
11756 return FALSE;
11757
11758 htab->emit_stub_syms = emit_stub_syms;
11759
11760 /* Allocate memory to hold the linker stubs. */
11761 for (stub_sec = htab->stub_bfd->sections;
11762 stub_sec != NULL;
11763 stub_sec = stub_sec->next)
11764 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11765 && stub_sec->size != 0)
11766 {
11767 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11768 if (stub_sec->contents == NULL)
11769 return FALSE;
11770 /* We want to check that built size is the same as calculated
11771 size. rawsize is a convenient location to use. */
11772 stub_sec->rawsize = stub_sec->size;
11773 stub_sec->size = 0;
11774 }
11775
11776 if (htab->glink != NULL && htab->glink->size != 0)
11777 {
11778 unsigned int indx;
11779 bfd_vma plt0;
11780
11781 /* Build the .glink plt call stub. */
11782 if (htab->emit_stub_syms)
11783 {
11784 struct elf_link_hash_entry *h;
11785 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11786 TRUE, FALSE, FALSE);
11787 if (h == NULL)
11788 return FALSE;
11789 if (h->root.type == bfd_link_hash_new)
11790 {
11791 h->root.type = bfd_link_hash_defined;
11792 h->root.u.def.section = htab->glink;
11793 h->root.u.def.value = 8;
11794 h->ref_regular = 1;
11795 h->def_regular = 1;
11796 h->ref_regular_nonweak = 1;
11797 h->forced_local = 1;
11798 h->non_elf = 0;
11799 }
11800 }
11801 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11802 if (info->emitrelocations)
11803 {
11804 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11805 if (r == NULL)
11806 return FALSE;
11807 r->r_offset = (htab->glink->output_offset
11808 + htab->glink->output_section->vma);
11809 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11810 r->r_addend = plt0;
11811 }
11812 p = htab->glink->contents;
11813 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11814 bfd_put_64 (htab->glink->owner, plt0, p);
11815 p += 8;
11816 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11817 p += 4;
11818 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11819 p += 4;
11820 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11821 p += 4;
11822 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11823 p += 4;
11824 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11825 p += 4;
11826 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11827 p += 4;
11828 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11829 p += 4;
11830 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11831 p += 4;
11832 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11833 p += 4;
11834 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11835 p += 4;
11836 bfd_put_32 (htab->glink->owner, BCTR, p);
11837 p += 4;
11838 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11839 {
11840 bfd_put_32 (htab->glink->owner, NOP, p);
11841 p += 4;
11842 }
11843
11844 /* Build the .glink lazy link call stubs. */
11845 indx = 0;
11846 while (p < htab->glink->contents + htab->glink->size)
11847 {
11848 if (indx < 0x8000)
11849 {
11850 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11851 p += 4;
11852 }
11853 else
11854 {
11855 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11856 p += 4;
11857 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11858 p += 4;
11859 }
11860 bfd_put_32 (htab->glink->owner,
11861 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11862 indx++;
11863 p += 4;
11864 }
11865 htab->glink->rawsize = p - htab->glink->contents;
11866 }
11867
11868 if (htab->brlt->size != 0)
11869 {
11870 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11871 htab->brlt->size);
11872 if (htab->brlt->contents == NULL)
11873 return FALSE;
11874 }
11875 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11876 {
11877 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11878 htab->relbrlt->size);
11879 if (htab->relbrlt->contents == NULL)
11880 return FALSE;
11881 }
11882
11883 if (htab->glink_eh_frame != NULL
11884 && htab->glink_eh_frame->size != 0)
11885 {
11886 bfd_vma val;
11887
11888 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
11889 if (p == NULL)
11890 return FALSE;
11891 htab->glink_eh_frame->contents = p;
11892
11893 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11894
11895 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
11896 /* CIE length (rewrite in case little-endian). */
11897 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
11898 p += sizeof (glink_eh_frame_cie);
11899
11900 for (stub_sec = htab->stub_bfd->sections;
11901 stub_sec != NULL;
11902 stub_sec = stub_sec->next)
11903 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11904 {
11905 /* FDE length. */
11906 bfd_put_32 (htab->elf.dynobj, 16, p);
11907 p += 4;
11908 /* CIE pointer. */
11909 val = p - htab->glink_eh_frame->contents;
11910 bfd_put_32 (htab->elf.dynobj, val, p);
11911 p += 4;
11912 /* Offset to stub section. */
11913 val = (stub_sec->output_section->vma
11914 + stub_sec->output_offset);
11915 val -= (htab->glink_eh_frame->output_section->vma
11916 + htab->glink_eh_frame->output_offset);
11917 val -= p - htab->glink_eh_frame->contents;
11918 if (val + 0x80000000 > 0xffffffff)
11919 {
11920 info->callbacks->einfo
11921 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
11922 stub_sec->name);
11923 return FALSE;
11924 }
11925 bfd_put_32 (htab->elf.dynobj, val, p);
11926 p += 4;
11927 /* stub section size. */
11928 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
11929 p += 4;
11930 /* Augmentation. */
11931 p += 1;
11932 /* Pad. */
11933 p += 3;
11934 }
11935 if (htab->glink != NULL && htab->glink->size != 0)
11936 {
11937 /* FDE length. */
11938 bfd_put_32 (htab->elf.dynobj, 20, p);
11939 p += 4;
11940 /* CIE pointer. */
11941 val = p - htab->glink_eh_frame->contents;
11942 bfd_put_32 (htab->elf.dynobj, val, p);
11943 p += 4;
11944 /* Offset to .glink. */
11945 val = (htab->glink->output_section->vma
11946 + htab->glink->output_offset
11947 + 8);
11948 val -= (htab->glink_eh_frame->output_section->vma
11949 + htab->glink_eh_frame->output_offset);
11950 val -= p - htab->glink_eh_frame->contents;
11951 if (val + 0x80000000 > 0xffffffff)
11952 {
11953 info->callbacks->einfo
11954 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
11955 htab->glink->name);
11956 return FALSE;
11957 }
11958 bfd_put_32 (htab->elf.dynobj, val, p);
11959 p += 4;
11960 /* .glink size. */
11961 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
11962 p += 4;
11963 /* Augmentation. */
11964 p += 1;
11965
11966 *p++ = DW_CFA_advance_loc + 1;
11967 *p++ = DW_CFA_register;
11968 *p++ = 65;
11969 *p++ = 12;
11970 *p++ = DW_CFA_advance_loc + 4;
11971 *p++ = DW_CFA_restore_extended;
11972 *p++ = 65;
11973 }
11974 htab->glink_eh_frame->size = p - htab->glink_eh_frame->contents;
11975 }
11976
11977 /* Build the stubs as directed by the stub hash table. */
11978 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11979
11980 if (htab->relbrlt != NULL)
11981 htab->relbrlt->reloc_count = 0;
11982
11983 if (htab->plt_stub_align != 0)
11984 for (stub_sec = htab->stub_bfd->sections;
11985 stub_sec != NULL;
11986 stub_sec = stub_sec->next)
11987 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11988 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11989 & (-1 << htab->plt_stub_align));
11990
11991 for (stub_sec = htab->stub_bfd->sections;
11992 stub_sec != NULL;
11993 stub_sec = stub_sec->next)
11994 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11995 {
11996 stub_sec_count += 1;
11997 if (stub_sec->rawsize != stub_sec->size)
11998 break;
11999 }
12000
12001 if (stub_sec != NULL
12002 || htab->glink->rawsize != htab->glink->size
12003 || (htab->glink_eh_frame != NULL
12004 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12005 {
12006 htab->stub_error = TRUE;
12007 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12008 }
12009
12010 if (htab->stub_error)
12011 return FALSE;
12012
12013 if (stats != NULL)
12014 {
12015 *stats = bfd_malloc (500);
12016 if (*stats == NULL)
12017 return FALSE;
12018
12019 sprintf (*stats, _("linker stubs in %u group%s\n"
12020 " branch %lu\n"
12021 " toc adjust %lu\n"
12022 " long branch %lu\n"
12023 " long toc adj %lu\n"
12024 " plt call %lu\n"
12025 " plt call toc %lu"),
12026 stub_sec_count,
12027 stub_sec_count == 1 ? "" : "s",
12028 htab->stub_count[ppc_stub_long_branch - 1],
12029 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12030 htab->stub_count[ppc_stub_plt_branch - 1],
12031 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12032 htab->stub_count[ppc_stub_plt_call - 1],
12033 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12034 }
12035 return TRUE;
12036 }
12037
12038 /* This function undoes the changes made by add_symbol_adjust. */
12039
12040 static bfd_boolean
12041 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12042 {
12043 struct ppc_link_hash_entry *eh;
12044
12045 if (h->root.type == bfd_link_hash_indirect)
12046 return TRUE;
12047
12048 eh = (struct ppc_link_hash_entry *) h;
12049 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12050 return TRUE;
12051
12052 eh->elf.root.type = bfd_link_hash_undefined;
12053 return TRUE;
12054 }
12055
12056 void
12057 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12058 {
12059 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12060
12061 if (htab != NULL)
12062 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12063 }
12064
12065 /* What to do when ld finds relocations against symbols defined in
12066 discarded sections. */
12067
12068 static unsigned int
12069 ppc64_elf_action_discarded (asection *sec)
12070 {
12071 if (strcmp (".opd", sec->name) == 0)
12072 return 0;
12073
12074 if (strcmp (".toc", sec->name) == 0)
12075 return 0;
12076
12077 if (strcmp (".toc1", sec->name) == 0)
12078 return 0;
12079
12080 return _bfd_elf_default_action_discarded (sec);
12081 }
12082
12083 /* The RELOCATE_SECTION function is called by the ELF backend linker
12084 to handle the relocations for a section.
12085
12086 The relocs are always passed as Rela structures; if the section
12087 actually uses Rel structures, the r_addend field will always be
12088 zero.
12089
12090 This function is responsible for adjust the section contents as
12091 necessary, and (if using Rela relocs and generating a
12092 relocatable output file) adjusting the reloc addend as
12093 necessary.
12094
12095 This function does not have to worry about setting the reloc
12096 address or the reloc symbol index.
12097
12098 LOCAL_SYMS is a pointer to the swapped in local symbols.
12099
12100 LOCAL_SECTIONS is an array giving the section in the input file
12101 corresponding to the st_shndx field of each local symbol.
12102
12103 The global hash table entry for the global symbols can be found
12104 via elf_sym_hashes (input_bfd).
12105
12106 When generating relocatable output, this function must handle
12107 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12108 going to be the section symbol corresponding to the output
12109 section, which means that the addend must be adjusted
12110 accordingly. */
12111
12112 static bfd_boolean
12113 ppc64_elf_relocate_section (bfd *output_bfd,
12114 struct bfd_link_info *info,
12115 bfd *input_bfd,
12116 asection *input_section,
12117 bfd_byte *contents,
12118 Elf_Internal_Rela *relocs,
12119 Elf_Internal_Sym *local_syms,
12120 asection **local_sections)
12121 {
12122 struct ppc_link_hash_table *htab;
12123 Elf_Internal_Shdr *symtab_hdr;
12124 struct elf_link_hash_entry **sym_hashes;
12125 Elf_Internal_Rela *rel;
12126 Elf_Internal_Rela *relend;
12127 Elf_Internal_Rela outrel;
12128 bfd_byte *loc;
12129 struct got_entry **local_got_ents;
12130 bfd_vma TOCstart;
12131 bfd_boolean ret = TRUE;
12132 bfd_boolean is_opd;
12133 /* Assume 'at' branch hints. */
12134 bfd_boolean is_isa_v2 = TRUE;
12135 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12136
12137 /* Initialize howto table if needed. */
12138 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12139 ppc_howto_init ();
12140
12141 htab = ppc_hash_table (info);
12142 if (htab == NULL)
12143 return FALSE;
12144
12145 /* Don't relocate stub sections. */
12146 if (input_section->owner == htab->stub_bfd)
12147 return TRUE;
12148
12149 BFD_ASSERT (is_ppc64_elf (input_bfd));
12150
12151 local_got_ents = elf_local_got_ents (input_bfd);
12152 TOCstart = elf_gp (output_bfd);
12153 symtab_hdr = &elf_symtab_hdr (input_bfd);
12154 sym_hashes = elf_sym_hashes (input_bfd);
12155 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12156
12157 rel = relocs;
12158 relend = relocs + input_section->reloc_count;
12159 for (; rel < relend; rel++)
12160 {
12161 enum elf_ppc64_reloc_type r_type;
12162 bfd_vma addend, orig_addend;
12163 bfd_reloc_status_type r;
12164 Elf_Internal_Sym *sym;
12165 asection *sec;
12166 struct elf_link_hash_entry *h_elf;
12167 struct ppc_link_hash_entry *h;
12168 struct ppc_link_hash_entry *fdh;
12169 const char *sym_name;
12170 unsigned long r_symndx, toc_symndx;
12171 bfd_vma toc_addend;
12172 unsigned char tls_mask, tls_gd, tls_type;
12173 unsigned char sym_type;
12174 bfd_vma relocation;
12175 bfd_boolean unresolved_reloc;
12176 bfd_boolean warned;
12177 unsigned int insn;
12178 unsigned int mask;
12179 struct ppc_stub_hash_entry *stub_entry;
12180 bfd_vma max_br_offset;
12181 bfd_vma from;
12182
12183 r_type = ELF64_R_TYPE (rel->r_info);
12184 r_symndx = ELF64_R_SYM (rel->r_info);
12185
12186 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12187 symbol of the previous ADDR64 reloc. The symbol gives us the
12188 proper TOC base to use. */
12189 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12190 && rel != relocs
12191 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12192 && is_opd)
12193 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12194
12195 sym = NULL;
12196 sec = NULL;
12197 h_elf = NULL;
12198 sym_name = NULL;
12199 unresolved_reloc = FALSE;
12200 warned = FALSE;
12201 orig_addend = rel->r_addend;
12202
12203 if (r_symndx < symtab_hdr->sh_info)
12204 {
12205 /* It's a local symbol. */
12206 struct _opd_sec_data *opd;
12207
12208 sym = local_syms + r_symndx;
12209 sec = local_sections[r_symndx];
12210 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12211 sym_type = ELF64_ST_TYPE (sym->st_info);
12212 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12213 opd = get_opd_info (sec);
12214 if (opd != NULL && opd->adjust != NULL)
12215 {
12216 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12217 if (adjust == -1)
12218 relocation = 0;
12219 else
12220 {
12221 /* If this is a relocation against the opd section sym
12222 and we have edited .opd, adjust the reloc addend so
12223 that ld -r and ld --emit-relocs output is correct.
12224 If it is a reloc against some other .opd symbol,
12225 then the symbol value will be adjusted later. */
12226 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12227 rel->r_addend += adjust;
12228 else
12229 relocation += adjust;
12230 }
12231 }
12232 }
12233 else
12234 {
12235 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12236 r_symndx, symtab_hdr, sym_hashes,
12237 h_elf, sec, relocation,
12238 unresolved_reloc, warned);
12239 sym_name = h_elf->root.root.string;
12240 sym_type = h_elf->type;
12241 }
12242 h = (struct ppc_link_hash_entry *) h_elf;
12243
12244 if (sec != NULL && elf_discarded_section (sec))
12245 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12246 rel, relend,
12247 ppc64_elf_howto_table[r_type],
12248 contents);
12249
12250 if (info->relocatable)
12251 continue;
12252
12253 /* TLS optimizations. Replace instruction sequences and relocs
12254 based on information we collected in tls_optimize. We edit
12255 RELOCS so that --emit-relocs will output something sensible
12256 for the final instruction stream. */
12257 tls_mask = 0;
12258 tls_gd = 0;
12259 toc_symndx = 0;
12260 if (h != NULL)
12261 tls_mask = h->tls_mask;
12262 else if (local_got_ents != NULL)
12263 {
12264 struct plt_entry **local_plt = (struct plt_entry **)
12265 (local_got_ents + symtab_hdr->sh_info);
12266 unsigned char *lgot_masks = (unsigned char *)
12267 (local_plt + symtab_hdr->sh_info);
12268 tls_mask = lgot_masks[r_symndx];
12269 }
12270 if (tls_mask == 0
12271 && (r_type == R_PPC64_TLS
12272 || r_type == R_PPC64_TLSGD
12273 || r_type == R_PPC64_TLSLD))
12274 {
12275 /* Check for toc tls entries. */
12276 unsigned char *toc_tls;
12277
12278 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12279 &local_syms, rel, input_bfd))
12280 return FALSE;
12281
12282 if (toc_tls)
12283 tls_mask = *toc_tls;
12284 }
12285
12286 /* Check that tls relocs are used with tls syms, and non-tls
12287 relocs are used with non-tls syms. */
12288 if (r_symndx != STN_UNDEF
12289 && r_type != R_PPC64_NONE
12290 && (h == NULL
12291 || h->elf.root.type == bfd_link_hash_defined
12292 || h->elf.root.type == bfd_link_hash_defweak)
12293 && (IS_PPC64_TLS_RELOC (r_type)
12294 != (sym_type == STT_TLS
12295 || (sym_type == STT_SECTION
12296 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12297 {
12298 if (tls_mask != 0
12299 && (r_type == R_PPC64_TLS
12300 || r_type == R_PPC64_TLSGD
12301 || r_type == R_PPC64_TLSLD))
12302 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12303 ;
12304 else
12305 info->callbacks->einfo
12306 (!IS_PPC64_TLS_RELOC (r_type)
12307 ? _("%P: %H: %s used with TLS symbol %s\n")
12308 : _("%P: %H: %s used with non-TLS symbol %s\n"),
12309 input_bfd, input_section, rel->r_offset,
12310 ppc64_elf_howto_table[r_type]->name,
12311 sym_name);
12312 }
12313
12314 /* Ensure reloc mapping code below stays sane. */
12315 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12316 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12317 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12318 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12319 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12320 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12321 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12322 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12323 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12324 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12325 abort ();
12326
12327 switch (r_type)
12328 {
12329 default:
12330 break;
12331
12332 case R_PPC64_LO_DS_OPT:
12333 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12334 if ((insn & (0x3f << 26)) != 58u << 26)
12335 abort ();
12336 insn += (14u << 26) - (58u << 26);
12337 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12338 r_type = R_PPC64_TOC16_LO;
12339 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12340 break;
12341
12342 case R_PPC64_TOC16:
12343 case R_PPC64_TOC16_LO:
12344 case R_PPC64_TOC16_DS:
12345 case R_PPC64_TOC16_LO_DS:
12346 {
12347 /* Check for toc tls entries. */
12348 unsigned char *toc_tls;
12349 int retval;
12350
12351 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12352 &local_syms, rel, input_bfd);
12353 if (retval == 0)
12354 return FALSE;
12355
12356 if (toc_tls)
12357 {
12358 tls_mask = *toc_tls;
12359 if (r_type == R_PPC64_TOC16_DS
12360 || r_type == R_PPC64_TOC16_LO_DS)
12361 {
12362 if (tls_mask != 0
12363 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12364 goto toctprel;
12365 }
12366 else
12367 {
12368 /* If we found a GD reloc pair, then we might be
12369 doing a GD->IE transition. */
12370 if (retval == 2)
12371 {
12372 tls_gd = TLS_TPRELGD;
12373 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12374 goto tls_ldgd_opt;
12375 }
12376 else if (retval == 3)
12377 {
12378 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12379 goto tls_ldgd_opt;
12380 }
12381 }
12382 }
12383 }
12384 break;
12385
12386 case R_PPC64_GOT_TPREL16_HI:
12387 case R_PPC64_GOT_TPREL16_HA:
12388 if (tls_mask != 0
12389 && (tls_mask & TLS_TPREL) == 0)
12390 {
12391 rel->r_offset -= d_offset;
12392 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12393 r_type = R_PPC64_NONE;
12394 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12395 }
12396 break;
12397
12398 case R_PPC64_GOT_TPREL16_DS:
12399 case R_PPC64_GOT_TPREL16_LO_DS:
12400 if (tls_mask != 0
12401 && (tls_mask & TLS_TPREL) == 0)
12402 {
12403 toctprel:
12404 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12405 insn &= 31 << 21;
12406 insn |= 0x3c0d0000; /* addis 0,13,0 */
12407 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12408 r_type = R_PPC64_TPREL16_HA;
12409 if (toc_symndx != 0)
12410 {
12411 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12412 rel->r_addend = toc_addend;
12413 /* We changed the symbol. Start over in order to
12414 get h, sym, sec etc. right. */
12415 rel--;
12416 continue;
12417 }
12418 else
12419 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12420 }
12421 break;
12422
12423 case R_PPC64_TLS:
12424 if (tls_mask != 0
12425 && (tls_mask & TLS_TPREL) == 0)
12426 {
12427 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12428 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12429 if (insn == 0)
12430 abort ();
12431 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12432 /* Was PPC64_TLS which sits on insn boundary, now
12433 PPC64_TPREL16_LO which is at low-order half-word. */
12434 rel->r_offset += d_offset;
12435 r_type = R_PPC64_TPREL16_LO;
12436 if (toc_symndx != 0)
12437 {
12438 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12439 rel->r_addend = toc_addend;
12440 /* We changed the symbol. Start over in order to
12441 get h, sym, sec etc. right. */
12442 rel--;
12443 continue;
12444 }
12445 else
12446 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12447 }
12448 break;
12449
12450 case R_PPC64_GOT_TLSGD16_HI:
12451 case R_PPC64_GOT_TLSGD16_HA:
12452 tls_gd = TLS_TPRELGD;
12453 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12454 goto tls_gdld_hi;
12455 break;
12456
12457 case R_PPC64_GOT_TLSLD16_HI:
12458 case R_PPC64_GOT_TLSLD16_HA:
12459 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12460 {
12461 tls_gdld_hi:
12462 if ((tls_mask & tls_gd) != 0)
12463 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12464 + R_PPC64_GOT_TPREL16_DS);
12465 else
12466 {
12467 rel->r_offset -= d_offset;
12468 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12469 r_type = R_PPC64_NONE;
12470 }
12471 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12472 }
12473 break;
12474
12475 case R_PPC64_GOT_TLSGD16:
12476 case R_PPC64_GOT_TLSGD16_LO:
12477 tls_gd = TLS_TPRELGD;
12478 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12479 goto tls_ldgd_opt;
12480 break;
12481
12482 case R_PPC64_GOT_TLSLD16:
12483 case R_PPC64_GOT_TLSLD16_LO:
12484 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12485 {
12486 unsigned int insn1, insn2, insn3;
12487 bfd_vma offset;
12488
12489 tls_ldgd_opt:
12490 offset = (bfd_vma) -1;
12491 /* If not using the newer R_PPC64_TLSGD/LD to mark
12492 __tls_get_addr calls, we must trust that the call
12493 stays with its arg setup insns, ie. that the next
12494 reloc is the __tls_get_addr call associated with
12495 the current reloc. Edit both insns. */
12496 if (input_section->has_tls_get_addr_call
12497 && rel + 1 < relend
12498 && branch_reloc_hash_match (input_bfd, rel + 1,
12499 htab->tls_get_addr,
12500 htab->tls_get_addr_fd))
12501 offset = rel[1].r_offset;
12502 if ((tls_mask & tls_gd) != 0)
12503 {
12504 /* IE */
12505 insn1 = bfd_get_32 (output_bfd,
12506 contents + rel->r_offset - d_offset);
12507 insn1 &= (1 << 26) - (1 << 2);
12508 insn1 |= 58 << 26; /* ld */
12509 insn2 = 0x7c636a14; /* add 3,3,13 */
12510 if (offset != (bfd_vma) -1)
12511 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12512 if ((tls_mask & TLS_EXPLICIT) == 0)
12513 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12514 + R_PPC64_GOT_TPREL16_DS);
12515 else
12516 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12517 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12518 }
12519 else
12520 {
12521 /* LE */
12522 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12523 insn2 = 0x38630000; /* addi 3,3,0 */
12524 if (tls_gd == 0)
12525 {
12526 /* Was an LD reloc. */
12527 if (toc_symndx)
12528 sec = local_sections[toc_symndx];
12529 for (r_symndx = 0;
12530 r_symndx < symtab_hdr->sh_info;
12531 r_symndx++)
12532 if (local_sections[r_symndx] == sec)
12533 break;
12534 if (r_symndx >= symtab_hdr->sh_info)
12535 r_symndx = STN_UNDEF;
12536 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12537 if (r_symndx != STN_UNDEF)
12538 rel->r_addend -= (local_syms[r_symndx].st_value
12539 + sec->output_offset
12540 + sec->output_section->vma);
12541 }
12542 else if (toc_symndx != 0)
12543 {
12544 r_symndx = toc_symndx;
12545 rel->r_addend = toc_addend;
12546 }
12547 r_type = R_PPC64_TPREL16_HA;
12548 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12549 if (offset != (bfd_vma) -1)
12550 {
12551 rel[1].r_info = ELF64_R_INFO (r_symndx,
12552 R_PPC64_TPREL16_LO);
12553 rel[1].r_offset = offset + d_offset;
12554 rel[1].r_addend = rel->r_addend;
12555 }
12556 }
12557 bfd_put_32 (output_bfd, insn1,
12558 contents + rel->r_offset - d_offset);
12559 if (offset != (bfd_vma) -1)
12560 {
12561 insn3 = bfd_get_32 (output_bfd,
12562 contents + offset + 4);
12563 if (insn3 == NOP
12564 || insn3 == CROR_151515 || insn3 == CROR_313131)
12565 {
12566 rel[1].r_offset += 4;
12567 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12568 insn2 = NOP;
12569 }
12570 bfd_put_32 (output_bfd, insn2, contents + offset);
12571 }
12572 if ((tls_mask & tls_gd) == 0
12573 && (tls_gd == 0 || toc_symndx != 0))
12574 {
12575 /* We changed the symbol. Start over in order
12576 to get h, sym, sec etc. right. */
12577 rel--;
12578 continue;
12579 }
12580 }
12581 break;
12582
12583 case R_PPC64_TLSGD:
12584 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12585 {
12586 unsigned int insn2, insn3;
12587 bfd_vma offset = rel->r_offset;
12588
12589 if ((tls_mask & TLS_TPRELGD) != 0)
12590 {
12591 /* IE */
12592 r_type = R_PPC64_NONE;
12593 insn2 = 0x7c636a14; /* add 3,3,13 */
12594 }
12595 else
12596 {
12597 /* LE */
12598 if (toc_symndx != 0)
12599 {
12600 r_symndx = toc_symndx;
12601 rel->r_addend = toc_addend;
12602 }
12603 r_type = R_PPC64_TPREL16_LO;
12604 rel->r_offset = offset + d_offset;
12605 insn2 = 0x38630000; /* addi 3,3,0 */
12606 }
12607 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12608 /* Zap the reloc on the _tls_get_addr call too. */
12609 BFD_ASSERT (offset == rel[1].r_offset);
12610 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12611 insn3 = bfd_get_32 (output_bfd,
12612 contents + offset + 4);
12613 if (insn3 == NOP
12614 || insn3 == CROR_151515 || insn3 == CROR_313131)
12615 {
12616 rel->r_offset += 4;
12617 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12618 insn2 = NOP;
12619 }
12620 bfd_put_32 (output_bfd, insn2, contents + offset);
12621 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12622 {
12623 rel--;
12624 continue;
12625 }
12626 }
12627 break;
12628
12629 case R_PPC64_TLSLD:
12630 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12631 {
12632 unsigned int insn2, insn3;
12633 bfd_vma offset = rel->r_offset;
12634
12635 if (toc_symndx)
12636 sec = local_sections[toc_symndx];
12637 for (r_symndx = 0;
12638 r_symndx < symtab_hdr->sh_info;
12639 r_symndx++)
12640 if (local_sections[r_symndx] == sec)
12641 break;
12642 if (r_symndx >= symtab_hdr->sh_info)
12643 r_symndx = STN_UNDEF;
12644 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12645 if (r_symndx != STN_UNDEF)
12646 rel->r_addend -= (local_syms[r_symndx].st_value
12647 + sec->output_offset
12648 + sec->output_section->vma);
12649
12650 r_type = R_PPC64_TPREL16_LO;
12651 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12652 rel->r_offset = offset + d_offset;
12653 /* Zap the reloc on the _tls_get_addr call too. */
12654 BFD_ASSERT (offset == rel[1].r_offset);
12655 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12656 insn2 = 0x38630000; /* addi 3,3,0 */
12657 insn3 = bfd_get_32 (output_bfd,
12658 contents + offset + 4);
12659 if (insn3 == NOP
12660 || insn3 == CROR_151515 || insn3 == CROR_313131)
12661 {
12662 rel->r_offset += 4;
12663 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12664 insn2 = NOP;
12665 }
12666 bfd_put_32 (output_bfd, insn2, contents + offset);
12667 rel--;
12668 continue;
12669 }
12670 break;
12671
12672 case R_PPC64_DTPMOD64:
12673 if (rel + 1 < relend
12674 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12675 && rel[1].r_offset == rel->r_offset + 8)
12676 {
12677 if ((tls_mask & TLS_GD) == 0)
12678 {
12679 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12680 if ((tls_mask & TLS_TPRELGD) != 0)
12681 r_type = R_PPC64_TPREL64;
12682 else
12683 {
12684 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12685 r_type = R_PPC64_NONE;
12686 }
12687 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12688 }
12689 }
12690 else
12691 {
12692 if ((tls_mask & TLS_LD) == 0)
12693 {
12694 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12695 r_type = R_PPC64_NONE;
12696 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12697 }
12698 }
12699 break;
12700
12701 case R_PPC64_TPREL64:
12702 if ((tls_mask & TLS_TPREL) == 0)
12703 {
12704 r_type = R_PPC64_NONE;
12705 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12706 }
12707 break;
12708 }
12709
12710 /* Handle other relocations that tweak non-addend part of insn. */
12711 insn = 0;
12712 max_br_offset = 1 << 25;
12713 addend = rel->r_addend;
12714 switch (r_type)
12715 {
12716 default:
12717 break;
12718
12719 case R_PPC64_TOCSAVE:
12720 if (relocation + addend == (rel->r_offset
12721 + input_section->output_offset
12722 + input_section->output_section->vma)
12723 && tocsave_find (htab, NO_INSERT,
12724 &local_syms, rel, input_bfd))
12725 {
12726 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12727 if (insn == NOP
12728 || insn == CROR_151515 || insn == CROR_313131)
12729 bfd_put_32 (input_bfd, STD_R2_40R1,
12730 contents + rel->r_offset);
12731 }
12732 break;
12733
12734 /* Branch taken prediction relocations. */
12735 case R_PPC64_ADDR14_BRTAKEN:
12736 case R_PPC64_REL14_BRTAKEN:
12737 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12738 /* Fall thru. */
12739
12740 /* Branch not taken prediction relocations. */
12741 case R_PPC64_ADDR14_BRNTAKEN:
12742 case R_PPC64_REL14_BRNTAKEN:
12743 insn |= bfd_get_32 (output_bfd,
12744 contents + rel->r_offset) & ~(0x01 << 21);
12745 /* Fall thru. */
12746
12747 case R_PPC64_REL14:
12748 max_br_offset = 1 << 15;
12749 /* Fall thru. */
12750
12751 case R_PPC64_REL24:
12752 /* Calls to functions with a different TOC, such as calls to
12753 shared objects, need to alter the TOC pointer. This is
12754 done using a linkage stub. A REL24 branching to these
12755 linkage stubs needs to be followed by a nop, as the nop
12756 will be replaced with an instruction to restore the TOC
12757 base pointer. */
12758 fdh = h;
12759 if (h != NULL
12760 && h->oh != NULL
12761 && h->oh->is_func_descriptor)
12762 fdh = ppc_follow_link (h->oh);
12763 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12764 if (stub_entry != NULL
12765 && (stub_entry->stub_type == ppc_stub_plt_call
12766 || stub_entry->stub_type == ppc_stub_plt_call_r2save
12767 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12768 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12769 {
12770 bfd_boolean can_plt_call = FALSE;
12771
12772 if (rel->r_offset + 8 <= input_section->size)
12773 {
12774 unsigned long nop;
12775 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12776 if (nop == NOP
12777 || nop == CROR_151515 || nop == CROR_313131)
12778 {
12779 if (h != NULL
12780 && (h == htab->tls_get_addr_fd
12781 || h == htab->tls_get_addr)
12782 && !htab->no_tls_get_addr_opt)
12783 {
12784 /* Special stub used, leave nop alone. */
12785 }
12786 else
12787 bfd_put_32 (input_bfd, LD_R2_40R1,
12788 contents + rel->r_offset + 4);
12789 can_plt_call = TRUE;
12790 }
12791 }
12792
12793 if (!can_plt_call)
12794 {
12795 if (stub_entry->stub_type == ppc_stub_plt_call
12796 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
12797 {
12798 /* If this is a plain branch rather than a branch
12799 and link, don't require a nop. However, don't
12800 allow tail calls in a shared library as they
12801 will result in r2 being corrupted. */
12802 unsigned long br;
12803 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12804 if (info->executable && (br & 1) == 0)
12805 can_plt_call = TRUE;
12806 else
12807 stub_entry = NULL;
12808 }
12809 else if (h != NULL
12810 && strcmp (h->elf.root.root.string,
12811 ".__libc_start_main") == 0)
12812 {
12813 /* Allow crt1 branch to go via a toc adjusting stub. */
12814 can_plt_call = TRUE;
12815 }
12816 else
12817 {
12818 if (strcmp (input_section->output_section->name,
12819 ".init") == 0
12820 || strcmp (input_section->output_section->name,
12821 ".fini") == 0)
12822 info->callbacks->einfo
12823 (_("%P: %H: automatic multiple TOCs "
12824 "not supported using your crt files; "
12825 "recompile with -mminimal-toc or upgrade gcc\n"),
12826 input_bfd, input_section, rel->r_offset);
12827 else
12828 info->callbacks->einfo
12829 (_("%P: %H: sibling call optimization to `%s' "
12830 "does not allow automatic multiple TOCs; "
12831 "recompile with -mminimal-toc or "
12832 "-fno-optimize-sibling-calls, "
12833 "or make `%s' extern\n"),
12834 input_bfd, input_section, rel->r_offset,
12835 sym_name,
12836 sym_name);
12837 bfd_set_error (bfd_error_bad_value);
12838 ret = FALSE;
12839 }
12840 }
12841
12842 if (can_plt_call
12843 && (stub_entry->stub_type == ppc_stub_plt_call
12844 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
12845 unresolved_reloc = FALSE;
12846 }
12847
12848 if ((stub_entry == NULL
12849 || stub_entry->stub_type == ppc_stub_long_branch
12850 || stub_entry->stub_type == ppc_stub_plt_branch)
12851 && get_opd_info (sec) != NULL)
12852 {
12853 /* The branch destination is the value of the opd entry. */
12854 bfd_vma off = (relocation + addend
12855 - sec->output_section->vma
12856 - sec->output_offset);
12857 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12858 if (dest != (bfd_vma) -1)
12859 {
12860 relocation = dest;
12861 addend = 0;
12862 }
12863 }
12864
12865 /* If the branch is out of reach we ought to have a long
12866 branch stub. */
12867 from = (rel->r_offset
12868 + input_section->output_offset
12869 + input_section->output_section->vma);
12870
12871 if (stub_entry != NULL
12872 && (stub_entry->stub_type == ppc_stub_long_branch
12873 || stub_entry->stub_type == ppc_stub_plt_branch)
12874 && (r_type == R_PPC64_ADDR14_BRTAKEN
12875 || r_type == R_PPC64_ADDR14_BRNTAKEN
12876 || (relocation + addend - from + max_br_offset
12877 < 2 * max_br_offset)))
12878 /* Don't use the stub if this branch is in range. */
12879 stub_entry = NULL;
12880
12881 if (stub_entry != NULL)
12882 {
12883 /* Munge up the value and addend so that we call the stub
12884 rather than the procedure directly. */
12885 relocation = (stub_entry->stub_offset
12886 + stub_entry->stub_sec->output_offset
12887 + stub_entry->stub_sec->output_section->vma);
12888 addend = 0;
12889
12890 if ((stub_entry->stub_type == ppc_stub_plt_call
12891 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
12892 && (ALWAYS_EMIT_R2SAVE
12893 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
12894 && rel + 1 < relend
12895 && rel[1].r_offset == rel->r_offset + 4
12896 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
12897 relocation += 4;
12898 }
12899
12900 if (insn != 0)
12901 {
12902 if (is_isa_v2)
12903 {
12904 /* Set 'a' bit. This is 0b00010 in BO field for branch
12905 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12906 for branch on CTR insns (BO == 1a00t or 1a01t). */
12907 if ((insn & (0x14 << 21)) == (0x04 << 21))
12908 insn |= 0x02 << 21;
12909 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12910 insn |= 0x08 << 21;
12911 else
12912 break;
12913 }
12914 else
12915 {
12916 /* Invert 'y' bit if not the default. */
12917 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12918 insn ^= 0x01 << 21;
12919 }
12920
12921 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12922 }
12923
12924 /* NOP out calls to undefined weak functions.
12925 We can thus call a weak function without first
12926 checking whether the function is defined. */
12927 else if (h != NULL
12928 && h->elf.root.type == bfd_link_hash_undefweak
12929 && h->elf.dynindx == -1
12930 && r_type == R_PPC64_REL24
12931 && relocation == 0
12932 && addend == 0)
12933 {
12934 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12935 continue;
12936 }
12937 break;
12938 }
12939
12940 /* Set `addend'. */
12941 tls_type = 0;
12942 switch (r_type)
12943 {
12944 default:
12945 info->callbacks->einfo
12946 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
12947 input_bfd, (int) r_type, sym_name);
12948
12949 bfd_set_error (bfd_error_bad_value);
12950 ret = FALSE;
12951 continue;
12952
12953 case R_PPC64_NONE:
12954 case R_PPC64_TLS:
12955 case R_PPC64_TLSGD:
12956 case R_PPC64_TLSLD:
12957 case R_PPC64_TOCSAVE:
12958 case R_PPC64_GNU_VTINHERIT:
12959 case R_PPC64_GNU_VTENTRY:
12960 continue;
12961
12962 /* GOT16 relocations. Like an ADDR16 using the symbol's
12963 address in the GOT as relocation value instead of the
12964 symbol's value itself. Also, create a GOT entry for the
12965 symbol and put the symbol value there. */
12966 case R_PPC64_GOT_TLSGD16:
12967 case R_PPC64_GOT_TLSGD16_LO:
12968 case R_PPC64_GOT_TLSGD16_HI:
12969 case R_PPC64_GOT_TLSGD16_HA:
12970 tls_type = TLS_TLS | TLS_GD;
12971 goto dogot;
12972
12973 case R_PPC64_GOT_TLSLD16:
12974 case R_PPC64_GOT_TLSLD16_LO:
12975 case R_PPC64_GOT_TLSLD16_HI:
12976 case R_PPC64_GOT_TLSLD16_HA:
12977 tls_type = TLS_TLS | TLS_LD;
12978 goto dogot;
12979
12980 case R_PPC64_GOT_TPREL16_DS:
12981 case R_PPC64_GOT_TPREL16_LO_DS:
12982 case R_PPC64_GOT_TPREL16_HI:
12983 case R_PPC64_GOT_TPREL16_HA:
12984 tls_type = TLS_TLS | TLS_TPREL;
12985 goto dogot;
12986
12987 case R_PPC64_GOT_DTPREL16_DS:
12988 case R_PPC64_GOT_DTPREL16_LO_DS:
12989 case R_PPC64_GOT_DTPREL16_HI:
12990 case R_PPC64_GOT_DTPREL16_HA:
12991 tls_type = TLS_TLS | TLS_DTPREL;
12992 goto dogot;
12993
12994 case R_PPC64_GOT16:
12995 case R_PPC64_GOT16_LO:
12996 case R_PPC64_GOT16_HI:
12997 case R_PPC64_GOT16_HA:
12998 case R_PPC64_GOT16_DS:
12999 case R_PPC64_GOT16_LO_DS:
13000 dogot:
13001 {
13002 /* Relocation is to the entry for this symbol in the global
13003 offset table. */
13004 asection *got;
13005 bfd_vma *offp;
13006 bfd_vma off;
13007 unsigned long indx = 0;
13008 struct got_entry *ent;
13009
13010 if (tls_type == (TLS_TLS | TLS_LD)
13011 && (h == NULL
13012 || !h->elf.def_dynamic))
13013 ent = ppc64_tlsld_got (input_bfd);
13014 else
13015 {
13016
13017 if (h != NULL)
13018 {
13019 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13020 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13021 &h->elf)
13022 || (info->shared
13023 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13024 /* This is actually a static link, or it is a
13025 -Bsymbolic link and the symbol is defined
13026 locally, or the symbol was forced to be local
13027 because of a version file. */
13028 ;
13029 else
13030 {
13031 indx = h->elf.dynindx;
13032 unresolved_reloc = FALSE;
13033 }
13034 ent = h->elf.got.glist;
13035 }
13036 else
13037 {
13038 if (local_got_ents == NULL)
13039 abort ();
13040 ent = local_got_ents[r_symndx];
13041 }
13042
13043 for (; ent != NULL; ent = ent->next)
13044 if (ent->addend == orig_addend
13045 && ent->owner == input_bfd
13046 && ent->tls_type == tls_type)
13047 break;
13048 }
13049
13050 if (ent == NULL)
13051 abort ();
13052 if (ent->is_indirect)
13053 ent = ent->got.ent;
13054 offp = &ent->got.offset;
13055 got = ppc64_elf_tdata (ent->owner)->got;
13056 if (got == NULL)
13057 abort ();
13058
13059 /* The offset must always be a multiple of 8. We use the
13060 least significant bit to record whether we have already
13061 processed this entry. */
13062 off = *offp;
13063 if ((off & 1) != 0)
13064 off &= ~1;
13065 else
13066 {
13067 /* Generate relocs for the dynamic linker, except in
13068 the case of TLSLD where we'll use one entry per
13069 module. */
13070 asection *relgot;
13071 bfd_boolean ifunc;
13072
13073 *offp = off | 1;
13074 relgot = NULL;
13075 ifunc = (h != NULL
13076 ? h->elf.type == STT_GNU_IFUNC
13077 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13078 if ((info->shared || indx != 0)
13079 && (h == NULL
13080 || (tls_type == (TLS_TLS | TLS_LD)
13081 && !h->elf.def_dynamic)
13082 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13083 || h->elf.root.type != bfd_link_hash_undefweak))
13084 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13085 else if (ifunc)
13086 relgot = htab->reliplt;
13087 if (relgot != NULL)
13088 {
13089 outrel.r_offset = (got->output_section->vma
13090 + got->output_offset
13091 + off);
13092 outrel.r_addend = addend;
13093 if (tls_type & (TLS_LD | TLS_GD))
13094 {
13095 outrel.r_addend = 0;
13096 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13097 if (tls_type == (TLS_TLS | TLS_GD))
13098 {
13099 loc = relgot->contents;
13100 loc += (relgot->reloc_count++
13101 * sizeof (Elf64_External_Rela));
13102 bfd_elf64_swap_reloca_out (output_bfd,
13103 &outrel, loc);
13104 outrel.r_offset += 8;
13105 outrel.r_addend = addend;
13106 outrel.r_info
13107 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13108 }
13109 }
13110 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13111 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13112 else if (tls_type == (TLS_TLS | TLS_TPREL))
13113 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13114 else if (indx != 0)
13115 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13116 else
13117 {
13118 if (ifunc)
13119 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13120 else
13121 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13122
13123 /* Write the .got section contents for the sake
13124 of prelink. */
13125 loc = got->contents + off;
13126 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13127 loc);
13128 }
13129
13130 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13131 {
13132 outrel.r_addend += relocation;
13133 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13134 outrel.r_addend -= htab->elf.tls_sec->vma;
13135 }
13136 loc = relgot->contents;
13137 loc += (relgot->reloc_count++
13138 * sizeof (Elf64_External_Rela));
13139 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13140 }
13141
13142 /* Init the .got section contents here if we're not
13143 emitting a reloc. */
13144 else
13145 {
13146 relocation += addend;
13147 if (tls_type == (TLS_TLS | TLS_LD))
13148 relocation = 1;
13149 else if (tls_type != 0)
13150 {
13151 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13152 if (tls_type == (TLS_TLS | TLS_TPREL))
13153 relocation += DTP_OFFSET - TP_OFFSET;
13154
13155 if (tls_type == (TLS_TLS | TLS_GD))
13156 {
13157 bfd_put_64 (output_bfd, relocation,
13158 got->contents + off + 8);
13159 relocation = 1;
13160 }
13161 }
13162
13163 bfd_put_64 (output_bfd, relocation,
13164 got->contents + off);
13165 }
13166 }
13167
13168 if (off >= (bfd_vma) -2)
13169 abort ();
13170
13171 relocation = got->output_section->vma + got->output_offset + off;
13172 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13173 }
13174 break;
13175
13176 case R_PPC64_PLT16_HA:
13177 case R_PPC64_PLT16_HI:
13178 case R_PPC64_PLT16_LO:
13179 case R_PPC64_PLT32:
13180 case R_PPC64_PLT64:
13181 /* Relocation is to the entry for this symbol in the
13182 procedure linkage table. */
13183
13184 /* Resolve a PLT reloc against a local symbol directly,
13185 without using the procedure linkage table. */
13186 if (h == NULL)
13187 break;
13188
13189 /* It's possible that we didn't make a PLT entry for this
13190 symbol. This happens when statically linking PIC code,
13191 or when using -Bsymbolic. Go find a match if there is a
13192 PLT entry. */
13193 if (htab->plt != NULL)
13194 {
13195 struct plt_entry *ent;
13196 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13197 if (ent->addend == orig_addend
13198 && ent->plt.offset != (bfd_vma) -1)
13199 {
13200 relocation = (htab->plt->output_section->vma
13201 + htab->plt->output_offset
13202 + ent->plt.offset);
13203 unresolved_reloc = FALSE;
13204 }
13205 }
13206 break;
13207
13208 case R_PPC64_TOC:
13209 /* Relocation value is TOC base. */
13210 relocation = TOCstart;
13211 if (r_symndx == STN_UNDEF)
13212 relocation += htab->stub_group[input_section->id].toc_off;
13213 else if (unresolved_reloc)
13214 ;
13215 else if (sec != NULL && sec->id <= htab->top_id)
13216 relocation += htab->stub_group[sec->id].toc_off;
13217 else
13218 unresolved_reloc = TRUE;
13219 goto dodyn;
13220
13221 /* TOC16 relocs. We want the offset relative to the TOC base,
13222 which is the address of the start of the TOC plus 0x8000.
13223 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13224 in this order. */
13225 case R_PPC64_TOC16:
13226 case R_PPC64_TOC16_LO:
13227 case R_PPC64_TOC16_HI:
13228 case R_PPC64_TOC16_DS:
13229 case R_PPC64_TOC16_LO_DS:
13230 case R_PPC64_TOC16_HA:
13231 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13232 break;
13233
13234 /* Relocate against the beginning of the section. */
13235 case R_PPC64_SECTOFF:
13236 case R_PPC64_SECTOFF_LO:
13237 case R_PPC64_SECTOFF_HI:
13238 case R_PPC64_SECTOFF_DS:
13239 case R_PPC64_SECTOFF_LO_DS:
13240 case R_PPC64_SECTOFF_HA:
13241 if (sec != NULL)
13242 addend -= sec->output_section->vma;
13243 break;
13244
13245 case R_PPC64_REL16:
13246 case R_PPC64_REL16_LO:
13247 case R_PPC64_REL16_HI:
13248 case R_PPC64_REL16_HA:
13249 break;
13250
13251 case R_PPC64_REL14:
13252 case R_PPC64_REL14_BRNTAKEN:
13253 case R_PPC64_REL14_BRTAKEN:
13254 case R_PPC64_REL24:
13255 break;
13256
13257 case R_PPC64_TPREL16:
13258 case R_PPC64_TPREL16_LO:
13259 case R_PPC64_TPREL16_HI:
13260 case R_PPC64_TPREL16_HA:
13261 case R_PPC64_TPREL16_DS:
13262 case R_PPC64_TPREL16_LO_DS:
13263 case R_PPC64_TPREL16_HIGHER:
13264 case R_PPC64_TPREL16_HIGHERA:
13265 case R_PPC64_TPREL16_HIGHEST:
13266 case R_PPC64_TPREL16_HIGHESTA:
13267 if (h != NULL
13268 && h->elf.root.type == bfd_link_hash_undefweak
13269 && h->elf.dynindx == -1)
13270 {
13271 /* Make this relocation against an undefined weak symbol
13272 resolve to zero. This is really just a tweak, since
13273 code using weak externs ought to check that they are
13274 defined before using them. */
13275 bfd_byte *p = contents + rel->r_offset - d_offset;
13276
13277 insn = bfd_get_32 (output_bfd, p);
13278 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13279 if (insn != 0)
13280 bfd_put_32 (output_bfd, insn, p);
13281 break;
13282 }
13283 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13284 if (info->shared)
13285 /* The TPREL16 relocs shouldn't really be used in shared
13286 libs as they will result in DT_TEXTREL being set, but
13287 support them anyway. */
13288 goto dodyn;
13289 break;
13290
13291 case R_PPC64_DTPREL16:
13292 case R_PPC64_DTPREL16_LO:
13293 case R_PPC64_DTPREL16_HI:
13294 case R_PPC64_DTPREL16_HA:
13295 case R_PPC64_DTPREL16_DS:
13296 case R_PPC64_DTPREL16_LO_DS:
13297 case R_PPC64_DTPREL16_HIGHER:
13298 case R_PPC64_DTPREL16_HIGHERA:
13299 case R_PPC64_DTPREL16_HIGHEST:
13300 case R_PPC64_DTPREL16_HIGHESTA:
13301 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13302 break;
13303
13304 case R_PPC64_DTPMOD64:
13305 relocation = 1;
13306 addend = 0;
13307 goto dodyn;
13308
13309 case R_PPC64_TPREL64:
13310 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13311 goto dodyn;
13312
13313 case R_PPC64_DTPREL64:
13314 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13315 /* Fall thru */
13316
13317 /* Relocations that may need to be propagated if this is a
13318 dynamic object. */
13319 case R_PPC64_REL30:
13320 case R_PPC64_REL32:
13321 case R_PPC64_REL64:
13322 case R_PPC64_ADDR14:
13323 case R_PPC64_ADDR14_BRNTAKEN:
13324 case R_PPC64_ADDR14_BRTAKEN:
13325 case R_PPC64_ADDR16:
13326 case R_PPC64_ADDR16_DS:
13327 case R_PPC64_ADDR16_HA:
13328 case R_PPC64_ADDR16_HI:
13329 case R_PPC64_ADDR16_HIGHER:
13330 case R_PPC64_ADDR16_HIGHERA:
13331 case R_PPC64_ADDR16_HIGHEST:
13332 case R_PPC64_ADDR16_HIGHESTA:
13333 case R_PPC64_ADDR16_LO:
13334 case R_PPC64_ADDR16_LO_DS:
13335 case R_PPC64_ADDR24:
13336 case R_PPC64_ADDR32:
13337 case R_PPC64_ADDR64:
13338 case R_PPC64_UADDR16:
13339 case R_PPC64_UADDR32:
13340 case R_PPC64_UADDR64:
13341 dodyn:
13342 if ((input_section->flags & SEC_ALLOC) == 0)
13343 break;
13344
13345 if (NO_OPD_RELOCS && is_opd)
13346 break;
13347
13348 if ((info->shared
13349 && (h == NULL
13350 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13351 || h->elf.root.type != bfd_link_hash_undefweak)
13352 && (must_be_dyn_reloc (info, r_type)
13353 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13354 || (ELIMINATE_COPY_RELOCS
13355 && !info->shared
13356 && h != NULL
13357 && h->elf.dynindx != -1
13358 && !h->elf.non_got_ref
13359 && !h->elf.def_regular)
13360 || (!info->shared
13361 && (h != NULL
13362 ? h->elf.type == STT_GNU_IFUNC
13363 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13364 {
13365 bfd_boolean skip, relocate;
13366 asection *sreloc;
13367 bfd_vma out_off;
13368
13369 /* When generating a dynamic object, these relocations
13370 are copied into the output file to be resolved at run
13371 time. */
13372
13373 skip = FALSE;
13374 relocate = FALSE;
13375
13376 out_off = _bfd_elf_section_offset (output_bfd, info,
13377 input_section, rel->r_offset);
13378 if (out_off == (bfd_vma) -1)
13379 skip = TRUE;
13380 else if (out_off == (bfd_vma) -2)
13381 skip = TRUE, relocate = TRUE;
13382 out_off += (input_section->output_section->vma
13383 + input_section->output_offset);
13384 outrel.r_offset = out_off;
13385 outrel.r_addend = rel->r_addend;
13386
13387 /* Optimize unaligned reloc use. */
13388 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13389 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13390 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13391 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13392 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13393 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13394 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13395 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13396 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13397
13398 if (skip)
13399 memset (&outrel, 0, sizeof outrel);
13400 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13401 && !is_opd
13402 && r_type != R_PPC64_TOC)
13403 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13404 else
13405 {
13406 /* This symbol is local, or marked to become local,
13407 or this is an opd section reloc which must point
13408 at a local function. */
13409 outrel.r_addend += relocation;
13410 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13411 {
13412 if (is_opd && h != NULL)
13413 {
13414 /* Lie about opd entries. This case occurs
13415 when building shared libraries and we
13416 reference a function in another shared
13417 lib. The same thing happens for a weak
13418 definition in an application that's
13419 overridden by a strong definition in a
13420 shared lib. (I believe this is a generic
13421 bug in binutils handling of weak syms.)
13422 In these cases we won't use the opd
13423 entry in this lib. */
13424 unresolved_reloc = FALSE;
13425 }
13426 if (!is_opd
13427 && r_type == R_PPC64_ADDR64
13428 && (h != NULL
13429 ? h->elf.type == STT_GNU_IFUNC
13430 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13431 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13432 else
13433 {
13434 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13435
13436 /* We need to relocate .opd contents for ld.so.
13437 Prelink also wants simple and consistent rules
13438 for relocs. This make all RELATIVE relocs have
13439 *r_offset equal to r_addend. */
13440 relocate = TRUE;
13441 }
13442 }
13443 else
13444 {
13445 long indx = 0;
13446
13447 if (h != NULL
13448 ? h->elf.type == STT_GNU_IFUNC
13449 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13450 {
13451 info->callbacks->einfo
13452 (_("%P: %H: relocation %s for indirect "
13453 "function %s unsupported\n"),
13454 input_bfd, input_section, rel->r_offset,
13455 ppc64_elf_howto_table[r_type]->name,
13456 sym_name);
13457 ret = FALSE;
13458 }
13459 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13460 ;
13461 else if (sec == NULL || sec->owner == NULL)
13462 {
13463 bfd_set_error (bfd_error_bad_value);
13464 return FALSE;
13465 }
13466 else
13467 {
13468 asection *osec;
13469
13470 osec = sec->output_section;
13471 indx = elf_section_data (osec)->dynindx;
13472
13473 if (indx == 0)
13474 {
13475 if ((osec->flags & SEC_READONLY) == 0
13476 && htab->elf.data_index_section != NULL)
13477 osec = htab->elf.data_index_section;
13478 else
13479 osec = htab->elf.text_index_section;
13480 indx = elf_section_data (osec)->dynindx;
13481 }
13482 BFD_ASSERT (indx != 0);
13483
13484 /* We are turning this relocation into one
13485 against a section symbol, so subtract out
13486 the output section's address but not the
13487 offset of the input section in the output
13488 section. */
13489 outrel.r_addend -= osec->vma;
13490 }
13491
13492 outrel.r_info = ELF64_R_INFO (indx, r_type);
13493 }
13494 }
13495
13496 sreloc = elf_section_data (input_section)->sreloc;
13497 if (!htab->elf.dynamic_sections_created)
13498 sreloc = htab->reliplt;
13499 if (sreloc == NULL)
13500 abort ();
13501
13502 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13503 >= sreloc->size)
13504 abort ();
13505 loc = sreloc->contents;
13506 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13507 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13508
13509 /* If this reloc is against an external symbol, it will
13510 be computed at runtime, so there's no need to do
13511 anything now. However, for the sake of prelink ensure
13512 that the section contents are a known value. */
13513 if (! relocate)
13514 {
13515 unresolved_reloc = FALSE;
13516 /* The value chosen here is quite arbitrary as ld.so
13517 ignores section contents except for the special
13518 case of .opd where the contents might be accessed
13519 before relocation. Choose zero, as that won't
13520 cause reloc overflow. */
13521 relocation = 0;
13522 addend = 0;
13523 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13524 to improve backward compatibility with older
13525 versions of ld. */
13526 if (r_type == R_PPC64_ADDR64)
13527 addend = outrel.r_addend;
13528 /* Adjust pc_relative relocs to have zero in *r_offset. */
13529 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13530 addend = (input_section->output_section->vma
13531 + input_section->output_offset
13532 + rel->r_offset);
13533 }
13534 }
13535 break;
13536
13537 case R_PPC64_COPY:
13538 case R_PPC64_GLOB_DAT:
13539 case R_PPC64_JMP_SLOT:
13540 case R_PPC64_JMP_IREL:
13541 case R_PPC64_RELATIVE:
13542 /* We shouldn't ever see these dynamic relocs in relocatable
13543 files. */
13544 /* Fall through. */
13545
13546 case R_PPC64_PLTGOT16:
13547 case R_PPC64_PLTGOT16_DS:
13548 case R_PPC64_PLTGOT16_HA:
13549 case R_PPC64_PLTGOT16_HI:
13550 case R_PPC64_PLTGOT16_LO:
13551 case R_PPC64_PLTGOT16_LO_DS:
13552 case R_PPC64_PLTREL32:
13553 case R_PPC64_PLTREL64:
13554 /* These ones haven't been implemented yet. */
13555
13556 info->callbacks->einfo
13557 (_("%P: %B: relocation %s is not supported for symbol %s\n"),
13558 input_bfd,
13559 ppc64_elf_howto_table[r_type]->name, sym_name);
13560
13561 bfd_set_error (bfd_error_invalid_operation);
13562 ret = FALSE;
13563 continue;
13564 }
13565
13566 /* Multi-instruction sequences that access the TOC can be
13567 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13568 to nop; addi rb,r2,x; */
13569 switch (r_type)
13570 {
13571 default:
13572 break;
13573
13574 case R_PPC64_GOT_TLSLD16_HI:
13575 case R_PPC64_GOT_TLSGD16_HI:
13576 case R_PPC64_GOT_TPREL16_HI:
13577 case R_PPC64_GOT_DTPREL16_HI:
13578 case R_PPC64_GOT16_HI:
13579 case R_PPC64_TOC16_HI:
13580 /* These relocs would only be useful if building up an
13581 offset to later add to r2, perhaps in an indexed
13582 addressing mode instruction. Don't try to optimize.
13583 Unfortunately, the possibility of someone building up an
13584 offset like this or even with the HA relocs, means that
13585 we need to check the high insn when optimizing the low
13586 insn. */
13587 break;
13588
13589 case R_PPC64_GOT_TLSLD16_HA:
13590 case R_PPC64_GOT_TLSGD16_HA:
13591 case R_PPC64_GOT_TPREL16_HA:
13592 case R_PPC64_GOT_DTPREL16_HA:
13593 case R_PPC64_GOT16_HA:
13594 case R_PPC64_TOC16_HA:
13595 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13596 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13597 {
13598 bfd_byte *p = contents + (rel->r_offset & ~3);
13599 bfd_put_32 (input_bfd, NOP, p);
13600 }
13601 break;
13602
13603 case R_PPC64_GOT_TLSLD16_LO:
13604 case R_PPC64_GOT_TLSGD16_LO:
13605 case R_PPC64_GOT_TPREL16_LO_DS:
13606 case R_PPC64_GOT_DTPREL16_LO_DS:
13607 case R_PPC64_GOT16_LO:
13608 case R_PPC64_GOT16_LO_DS:
13609 case R_PPC64_TOC16_LO:
13610 case R_PPC64_TOC16_LO_DS:
13611 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13612 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13613 {
13614 bfd_byte *p = contents + (rel->r_offset & ~3);
13615 insn = bfd_get_32 (input_bfd, p);
13616 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13617 {
13618 /* Transform addic to addi when we change reg. */
13619 insn &= ~((0x3f << 26) | (0x1f << 16));
13620 insn |= (14u << 26) | (2 << 16);
13621 }
13622 else
13623 {
13624 insn &= ~(0x1f << 16);
13625 insn |= 2 << 16;
13626 }
13627 bfd_put_32 (input_bfd, insn, p);
13628 }
13629 break;
13630 }
13631
13632 /* Do any further special processing. */
13633 switch (r_type)
13634 {
13635 default:
13636 break;
13637
13638 case R_PPC64_ADDR16_HA:
13639 case R_PPC64_REL16_HA:
13640 case R_PPC64_ADDR16_HIGHERA:
13641 case R_PPC64_ADDR16_HIGHESTA:
13642 case R_PPC64_TOC16_HA:
13643 case R_PPC64_SECTOFF_HA:
13644 case R_PPC64_TPREL16_HA:
13645 case R_PPC64_DTPREL16_HA:
13646 case R_PPC64_TPREL16_HIGHER:
13647 case R_PPC64_TPREL16_HIGHERA:
13648 case R_PPC64_TPREL16_HIGHEST:
13649 case R_PPC64_TPREL16_HIGHESTA:
13650 case R_PPC64_DTPREL16_HIGHER:
13651 case R_PPC64_DTPREL16_HIGHERA:
13652 case R_PPC64_DTPREL16_HIGHEST:
13653 case R_PPC64_DTPREL16_HIGHESTA:
13654 /* It's just possible that this symbol is a weak symbol
13655 that's not actually defined anywhere. In that case,
13656 'sec' would be NULL, and we should leave the symbol
13657 alone (it will be set to zero elsewhere in the link). */
13658 if (sec == NULL)
13659 break;
13660 /* Fall thru */
13661
13662 case R_PPC64_GOT16_HA:
13663 case R_PPC64_PLTGOT16_HA:
13664 case R_PPC64_PLT16_HA:
13665 case R_PPC64_GOT_TLSGD16_HA:
13666 case R_PPC64_GOT_TLSLD16_HA:
13667 case R_PPC64_GOT_TPREL16_HA:
13668 case R_PPC64_GOT_DTPREL16_HA:
13669 /* Add 0x10000 if sign bit in 0:15 is set.
13670 Bits 0:15 are not used. */
13671 addend += 0x8000;
13672 break;
13673
13674 case R_PPC64_ADDR16_DS:
13675 case R_PPC64_ADDR16_LO_DS:
13676 case R_PPC64_GOT16_DS:
13677 case R_PPC64_GOT16_LO_DS:
13678 case R_PPC64_PLT16_LO_DS:
13679 case R_PPC64_SECTOFF_DS:
13680 case R_PPC64_SECTOFF_LO_DS:
13681 case R_PPC64_TOC16_DS:
13682 case R_PPC64_TOC16_LO_DS:
13683 case R_PPC64_PLTGOT16_DS:
13684 case R_PPC64_PLTGOT16_LO_DS:
13685 case R_PPC64_GOT_TPREL16_DS:
13686 case R_PPC64_GOT_TPREL16_LO_DS:
13687 case R_PPC64_GOT_DTPREL16_DS:
13688 case R_PPC64_GOT_DTPREL16_LO_DS:
13689 case R_PPC64_TPREL16_DS:
13690 case R_PPC64_TPREL16_LO_DS:
13691 case R_PPC64_DTPREL16_DS:
13692 case R_PPC64_DTPREL16_LO_DS:
13693 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13694 mask = 3;
13695 /* If this reloc is against an lq insn, then the value must be
13696 a multiple of 16. This is somewhat of a hack, but the
13697 "correct" way to do this by defining _DQ forms of all the
13698 _DS relocs bloats all reloc switches in this file. It
13699 doesn't seem to make much sense to use any of these relocs
13700 in data, so testing the insn should be safe. */
13701 if ((insn & (0x3f << 26)) == (56u << 26))
13702 mask = 15;
13703 if (((relocation + addend) & mask) != 0)
13704 {
13705 info->callbacks->einfo
13706 (_("%P: %H: error: %s not a multiple of %u\n"),
13707 input_bfd, input_section, rel->r_offset,
13708 ppc64_elf_howto_table[r_type]->name,
13709 mask + 1);
13710 bfd_set_error (bfd_error_bad_value);
13711 ret = FALSE;
13712 continue;
13713 }
13714 break;
13715 }
13716
13717 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13718 because such sections are not SEC_ALLOC and thus ld.so will
13719 not process them. */
13720 if (unresolved_reloc
13721 && !((input_section->flags & SEC_DEBUGGING) != 0
13722 && h->elf.def_dynamic)
13723 && _bfd_elf_section_offset (output_bfd, info, input_section,
13724 rel->r_offset) != (bfd_vma) -1)
13725 {
13726 info->callbacks->einfo
13727 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
13728 input_bfd, input_section, rel->r_offset,
13729 ppc64_elf_howto_table[(int) r_type]->name,
13730 h->elf.root.root.string);
13731 ret = FALSE;
13732 }
13733
13734 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13735 input_bfd,
13736 input_section,
13737 contents,
13738 rel->r_offset,
13739 relocation,
13740 addend);
13741
13742 if (r != bfd_reloc_ok)
13743 {
13744 if (sym_name == NULL)
13745 sym_name = "(null)";
13746 if (r == bfd_reloc_overflow)
13747 {
13748 if (warned)
13749 continue;
13750 if (h != NULL
13751 && h->elf.root.type == bfd_link_hash_undefweak
13752 && ppc64_elf_howto_table[r_type]->pc_relative)
13753 {
13754 /* Assume this is a call protected by other code that
13755 detects the symbol is undefined. If this is the case,
13756 we can safely ignore the overflow. If not, the
13757 program is hosed anyway, and a little warning isn't
13758 going to help. */
13759
13760 continue;
13761 }
13762
13763 if (!((*info->callbacks->reloc_overflow)
13764 (info, (h ? &h->elf.root : NULL), sym_name,
13765 ppc64_elf_howto_table[r_type]->name,
13766 orig_addend, input_bfd, input_section, rel->r_offset)))
13767 return FALSE;
13768 }
13769 else
13770 {
13771 info->callbacks->einfo
13772 (_("%P: %H: %s reloc against `%s': error %d\n"),
13773 input_bfd, input_section, rel->r_offset,
13774 ppc64_elf_howto_table[r_type]->name,
13775 sym_name,
13776 (int) r);
13777 ret = FALSE;
13778 }
13779 }
13780 }
13781
13782 /* If we're emitting relocations, then shortly after this function
13783 returns, reloc offsets and addends for this section will be
13784 adjusted. Worse, reloc symbol indices will be for the output
13785 file rather than the input. Save a copy of the relocs for
13786 opd_entry_value. */
13787 if (is_opd && (info->emitrelocations || info->relocatable))
13788 {
13789 bfd_size_type amt;
13790 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13791 rel = bfd_alloc (input_bfd, amt);
13792 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13793 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13794 if (rel == NULL)
13795 return FALSE;
13796 memcpy (rel, relocs, amt);
13797 }
13798 return ret;
13799 }
13800
13801 /* Adjust the value of any local symbols in opd sections. */
13802
13803 static int
13804 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13805 const char *name ATTRIBUTE_UNUSED,
13806 Elf_Internal_Sym *elfsym,
13807 asection *input_sec,
13808 struct elf_link_hash_entry *h)
13809 {
13810 struct _opd_sec_data *opd;
13811 long adjust;
13812 bfd_vma value;
13813
13814 if (h != NULL)
13815 return 1;
13816
13817 opd = get_opd_info (input_sec);
13818 if (opd == NULL || opd->adjust == NULL)
13819 return 1;
13820
13821 value = elfsym->st_value - input_sec->output_offset;
13822 if (!info->relocatable)
13823 value -= input_sec->output_section->vma;
13824
13825 adjust = opd->adjust[value / 8];
13826 if (adjust == -1)
13827 return 2;
13828
13829 elfsym->st_value += adjust;
13830 return 1;
13831 }
13832
13833 /* Finish up dynamic symbol handling. We set the contents of various
13834 dynamic sections here. */
13835
13836 static bfd_boolean
13837 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13838 struct bfd_link_info *info,
13839 struct elf_link_hash_entry *h,
13840 Elf_Internal_Sym *sym)
13841 {
13842 struct ppc_link_hash_table *htab;
13843 struct plt_entry *ent;
13844 Elf_Internal_Rela rela;
13845 bfd_byte *loc;
13846
13847 htab = ppc_hash_table (info);
13848 if (htab == NULL)
13849 return FALSE;
13850
13851 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13852 if (ent->plt.offset != (bfd_vma) -1)
13853 {
13854 /* This symbol has an entry in the procedure linkage
13855 table. Set it up. */
13856 if (!htab->elf.dynamic_sections_created
13857 || h->dynindx == -1)
13858 {
13859 BFD_ASSERT (h->type == STT_GNU_IFUNC
13860 && h->def_regular
13861 && (h->root.type == bfd_link_hash_defined
13862 || h->root.type == bfd_link_hash_defweak));
13863 rela.r_offset = (htab->iplt->output_section->vma
13864 + htab->iplt->output_offset
13865 + ent->plt.offset);
13866 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13867 rela.r_addend = (h->root.u.def.value
13868 + h->root.u.def.section->output_offset
13869 + h->root.u.def.section->output_section->vma
13870 + ent->addend);
13871 loc = (htab->reliplt->contents
13872 + (htab->reliplt->reloc_count++
13873 * sizeof (Elf64_External_Rela)));
13874 }
13875 else
13876 {
13877 rela.r_offset = (htab->plt->output_section->vma
13878 + htab->plt->output_offset
13879 + ent->plt.offset);
13880 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13881 rela.r_addend = ent->addend;
13882 loc = (htab->relplt->contents
13883 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13884 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13885 }
13886 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13887 }
13888
13889 if (h->needs_copy)
13890 {
13891 /* This symbol needs a copy reloc. Set it up. */
13892
13893 if (h->dynindx == -1
13894 || (h->root.type != bfd_link_hash_defined
13895 && h->root.type != bfd_link_hash_defweak)
13896 || htab->relbss == NULL)
13897 abort ();
13898
13899 rela.r_offset = (h->root.u.def.value
13900 + h->root.u.def.section->output_section->vma
13901 + h->root.u.def.section->output_offset);
13902 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13903 rela.r_addend = 0;
13904 loc = htab->relbss->contents;
13905 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13906 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13907 }
13908
13909 /* Mark some specially defined symbols as absolute. */
13910 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13911 sym->st_shndx = SHN_ABS;
13912
13913 return TRUE;
13914 }
13915
13916 /* Used to decide how to sort relocs in an optimal manner for the
13917 dynamic linker, before writing them out. */
13918
13919 static enum elf_reloc_type_class
13920 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13921 {
13922 enum elf_ppc64_reloc_type r_type;
13923
13924 r_type = ELF64_R_TYPE (rela->r_info);
13925 switch (r_type)
13926 {
13927 case R_PPC64_RELATIVE:
13928 return reloc_class_relative;
13929 case R_PPC64_JMP_SLOT:
13930 return reloc_class_plt;
13931 case R_PPC64_COPY:
13932 return reloc_class_copy;
13933 default:
13934 return reloc_class_normal;
13935 }
13936 }
13937
13938 /* Finish up the dynamic sections. */
13939
13940 static bfd_boolean
13941 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13942 struct bfd_link_info *info)
13943 {
13944 struct ppc_link_hash_table *htab;
13945 bfd *dynobj;
13946 asection *sdyn;
13947
13948 htab = ppc_hash_table (info);
13949 if (htab == NULL)
13950 return FALSE;
13951
13952 dynobj = htab->elf.dynobj;
13953 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13954
13955 if (htab->elf.dynamic_sections_created)
13956 {
13957 Elf64_External_Dyn *dyncon, *dynconend;
13958
13959 if (sdyn == NULL || htab->got == NULL)
13960 abort ();
13961
13962 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13963 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13964 for (; dyncon < dynconend; dyncon++)
13965 {
13966 Elf_Internal_Dyn dyn;
13967 asection *s;
13968
13969 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13970
13971 switch (dyn.d_tag)
13972 {
13973 default:
13974 continue;
13975
13976 case DT_PPC64_GLINK:
13977 s = htab->glink;
13978 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13979 /* We stupidly defined DT_PPC64_GLINK to be the start
13980 of glink rather than the first entry point, which is
13981 what ld.so needs, and now have a bigger stub to
13982 support automatic multiple TOCs. */
13983 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13984 break;
13985
13986 case DT_PPC64_OPD:
13987 s = bfd_get_section_by_name (output_bfd, ".opd");
13988 if (s == NULL)
13989 continue;
13990 dyn.d_un.d_ptr = s->vma;
13991 break;
13992
13993 case DT_PPC64_OPDSZ:
13994 s = bfd_get_section_by_name (output_bfd, ".opd");
13995 if (s == NULL)
13996 continue;
13997 dyn.d_un.d_val = s->size;
13998 break;
13999
14000 case DT_PLTGOT:
14001 s = htab->plt;
14002 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14003 break;
14004
14005 case DT_JMPREL:
14006 s = htab->relplt;
14007 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14008 break;
14009
14010 case DT_PLTRELSZ:
14011 dyn.d_un.d_val = htab->relplt->size;
14012 break;
14013
14014 case DT_RELASZ:
14015 /* Don't count procedure linkage table relocs in the
14016 overall reloc count. */
14017 s = htab->relplt;
14018 if (s == NULL)
14019 continue;
14020 dyn.d_un.d_val -= s->size;
14021 break;
14022
14023 case DT_RELA:
14024 /* We may not be using the standard ELF linker script.
14025 If .rela.plt is the first .rela section, we adjust
14026 DT_RELA to not include it. */
14027 s = htab->relplt;
14028 if (s == NULL)
14029 continue;
14030 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14031 continue;
14032 dyn.d_un.d_ptr += s->size;
14033 break;
14034 }
14035
14036 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14037 }
14038 }
14039
14040 if (htab->got != NULL && htab->got->size != 0)
14041 {
14042 /* Fill in the first entry in the global offset table.
14043 We use it to hold the link-time TOCbase. */
14044 bfd_put_64 (output_bfd,
14045 elf_gp (output_bfd) + TOC_BASE_OFF,
14046 htab->got->contents);
14047
14048 /* Set .got entry size. */
14049 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14050 }
14051
14052 if (htab->plt != NULL && htab->plt->size != 0)
14053 {
14054 /* Set .plt entry size. */
14055 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14056 = PLT_ENTRY_SIZE;
14057 }
14058
14059 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14060 brlt ourselves if emitrelocations. */
14061 if (htab->brlt != NULL
14062 && htab->brlt->reloc_count != 0
14063 && !_bfd_elf_link_output_relocs (output_bfd,
14064 htab->brlt,
14065 elf_section_data (htab->brlt)->rela.hdr,
14066 elf_section_data (htab->brlt)->relocs,
14067 NULL))
14068 return FALSE;
14069
14070 if (htab->glink != NULL
14071 && htab->glink->reloc_count != 0
14072 && !_bfd_elf_link_output_relocs (output_bfd,
14073 htab->glink,
14074 elf_section_data (htab->glink)->rela.hdr,
14075 elf_section_data (htab->glink)->relocs,
14076 NULL))
14077 return FALSE;
14078
14079
14080 if (htab->glink_eh_frame != NULL
14081 && htab->glink_eh_frame->sec_info_type == ELF_INFO_TYPE_EH_FRAME
14082 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14083 htab->glink_eh_frame,
14084 htab->glink_eh_frame->contents))
14085 return FALSE;
14086
14087 /* We need to handle writing out multiple GOT sections ourselves,
14088 since we didn't add them to DYNOBJ. We know dynobj is the first
14089 bfd. */
14090 while ((dynobj = dynobj->link_next) != NULL)
14091 {
14092 asection *s;
14093
14094 if (!is_ppc64_elf (dynobj))
14095 continue;
14096
14097 s = ppc64_elf_tdata (dynobj)->got;
14098 if (s != NULL
14099 && s->size != 0
14100 && s->output_section != bfd_abs_section_ptr
14101 && !bfd_set_section_contents (output_bfd, s->output_section,
14102 s->contents, s->output_offset,
14103 s->size))
14104 return FALSE;
14105 s = ppc64_elf_tdata (dynobj)->relgot;
14106 if (s != NULL
14107 && s->size != 0
14108 && s->output_section != bfd_abs_section_ptr
14109 && !bfd_set_section_contents (output_bfd, s->output_section,
14110 s->contents, s->output_offset,
14111 s->size))
14112 return FALSE;
14113 }
14114
14115 return TRUE;
14116 }
14117
14118 #include "elf64-target.h"
14119
14120 /* FreeBSD support */
14121
14122 #undef TARGET_LITTLE_SYM
14123 #undef TARGET_LITTLE_NAME
14124
14125 #undef TARGET_BIG_SYM
14126 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14127 #undef TARGET_BIG_NAME
14128 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14129
14130 #undef ELF_OSABI
14131 #define ELF_OSABI ELFOSABI_FREEBSD
14132
14133 #undef elf64_bed
14134 #define elf64_bed elf64_powerpc_fbsd_bed
14135
14136 #include "elf64-target.h"
14137
GDB Binutils - Deliverables
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