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PR 21847, PowerPC64 --plt-localentry again
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_want_dynrelro 1
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_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_gc_keep ppc64_elf_gc_keep
105 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
106 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
107 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* glink call stub instructions. We enter with the index in R0. */
191 #define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
196 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213 /* Pad with this. */
214 #define NOP 0x60000000
215
216 /* Some other nops. */
217 #define CROR_151515 0x4def7b82
218 #define CROR_313131 0x4ffffb82
219
220 /* .glink entries for the first 32k functions are two instructions. */
221 #define LI_R0_0 0x38000000 /* li %r0,0 */
222 #define B_DOT 0x48000000 /* b . */
223
224 /* After that, we need two instructions to load the index, followed by
225 a branch. */
226 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229 /* Instructions used by the save and restore reg functions. */
230 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236 #define LI_R12_0 0x39800000 /* li %r12,0 */
237 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240 #define BLR 0x4e800020 /* blr */
241
242 /* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246 #ifndef NO_OPD_RELOCS
247 #define NO_OPD_RELOCS 0
248 #endif
249
250 #ifndef ARRAY_SIZE
251 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252 #endif
253
254 static inline int
255 abiversion (bfd *abfd)
256 {
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258 }
259
260 static inline void
261 set_abiversion (bfd *abfd, int ver)
262 {
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265 }
266 \f
267 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269 /* Relocation HOWTO's. */
270 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272 static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* 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_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213 };
2214
2215 \f
2216 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219 static void
2220 ppc_howto_init (void)
2221 {
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230 }
2231
2232 static reloc_howto_type *
2233 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235 {
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484 };
2485
2486 static reloc_howto_type *
2487 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489 {
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498 }
2499
2500 /* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502 static void
2503 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505 {
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521 }
2522
2523 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525 static bfd_reloc_status_type
2526 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529 {
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569 }
2570
2571 static bfd_reloc_status_type
2572 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575 {
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679 }
2680
2681 static bfd_reloc_status_type
2682 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
2685 {
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738 return bfd_reloc_continue;
2739 }
2740
2741 static bfd_reloc_status_type
2742 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745 {
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811 }
2812
2813 /* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815 struct got_entry
2816 {
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845 };
2846
2847 /* The same for PLT. */
2848 struct plt_entry
2849 {
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859 };
2860
2861 struct ppc64_elf_obj_tdata
2862 {
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892 };
2893
2894 #define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897 #define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900 #define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904 /* Override the generic function because we store some extras. */
2905
2906 static bfd_boolean
2907 ppc64_elf_mkobject (bfd *abfd)
2908 {
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911 }
2912
2913 /* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916 static bfd_boolean
2917 ppc64_elf_object_p (bfd *abfd)
2918 {
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934 }
2935
2936 /* Support for core dump NOTE sections. */
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959 }
2960
2961 static bfd_boolean
2962 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963 {
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975 }
2976
2977 static char *
2978 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980 {
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022 }
3023
3024 /* Add extra PPC sections. */
3025
3026 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027 {
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035 };
3036
3037 enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041 };
3042
3043 struct _ppc64_elf_section_data
3044 {
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051 #define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077 };
3078
3079 #define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082 static bfd_boolean
3083 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084 {
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097 }
3098
3099 static struct _opd_sec_data *
3100 get_opd_info (asection * sec)
3101 {
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107 }
3108 \f
3109 /* Parameters for the qsort hook. */
3110 static bfd_boolean synthetic_relocatable;
3111 static asection *synthetic_opd;
3112
3113 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115 static int
3116 compare_symbols (const void *ap, const void *bp)
3117 {
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193 }
3194
3195 /* Search SYMS for a symbol of the given VALUE. */
3196
3197 static asymbol *
3198 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199 {
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233 }
3234
3235 static bfd_boolean
3236 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237 {
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242 }
3243
3244 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248 static long
3249 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253 {
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 symcount = static_count;
3274 if (!relocatable)
3275 symcount += dyn_count;
3276 if (symcount == 0)
3277 return 0;
3278
3279 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3280 if (syms == NULL)
3281 return -1;
3282
3283 if (!relocatable && static_count != 0 && dyn_count != 0)
3284 {
3285 /* Use both symbol tables. */
3286 memcpy (syms, static_syms, static_count * sizeof (*syms));
3287 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3288 }
3289 else if (!relocatable && static_count == 0)
3290 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3291 else
3292 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3293
3294 synthetic_relocatable = relocatable;
3295 synthetic_opd = opd;
3296 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3297
3298 if (!relocatable && symcount > 1)
3299 {
3300 long j;
3301 /* Trim duplicate syms, since we may have merged the normal and
3302 dynamic symbols. Actually, we only care about syms that have
3303 different values, so trim any with the same value. */
3304 for (i = 1, j = 1; i < symcount; ++i)
3305 if (syms[i - 1]->value + syms[i - 1]->section->vma
3306 != syms[i]->value + syms[i]->section->vma)
3307 syms[j++] = syms[i];
3308 symcount = j;
3309 }
3310
3311 i = 0;
3312 /* Note that here and in compare_symbols we can't compare opd and
3313 sym->section directly. With separate debug info files, the
3314 symbols will be extracted from the debug file while abfd passed
3315 to this function is the real binary. */
3316 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3317 ++i;
3318 codesecsym = i;
3319
3320 for (; i < symcount; ++i)
3321 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3322 != (SEC_CODE | SEC_ALLOC))
3323 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3324 break;
3325 codesecsymend = i;
3326
3327 for (; i < symcount; ++i)
3328 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3329 break;
3330 secsymend = i;
3331
3332 if (opd != NULL)
3333 for (; i < symcount; ++i)
3334 if (strcmp (syms[i]->section->name, ".opd") != 0)
3335 break;
3336 opdsymend = i;
3337
3338 for (; i < symcount; ++i)
3339 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3340 != (SEC_CODE | SEC_ALLOC))
3341 break;
3342 symcount = i;
3343
3344 count = 0;
3345
3346 if (relocatable)
3347 {
3348 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3349 arelent *r;
3350 size_t size;
3351 long relcount;
3352
3353 if (opdsymend == secsymend)
3354 goto done;
3355
3356 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3357 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3358 if (relcount == 0)
3359 goto done;
3360
3361 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 size = 0;
3368 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3369 {
3370 asymbol *sym;
3371
3372 while (r < opd->relocation + relcount
3373 && r->address < syms[i]->value + opd->vma)
3374 ++r;
3375
3376 if (r == opd->relocation + relcount)
3377 break;
3378
3379 if (r->address != syms[i]->value + opd->vma)
3380 continue;
3381
3382 if (r->howto->type != R_PPC64_ADDR64)
3383 continue;
3384
3385 sym = *r->sym_ptr_ptr;
3386 if (!sym_exists_at (syms, opdsymend, symcount,
3387 sym->section->id, sym->value + r->addend))
3388 {
3389 ++count;
3390 size += sizeof (asymbol);
3391 size += strlen (syms[i]->name) + 2;
3392 }
3393 }
3394
3395 if (size == 0)
3396 goto done;
3397 s = *ret = bfd_malloc (size);
3398 if (s == NULL)
3399 {
3400 count = -1;
3401 goto done;
3402 }
3403
3404 names = (char *) (s + count);
3405
3406 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3407 {
3408 asymbol *sym;
3409
3410 while (r < opd->relocation + relcount
3411 && r->address < syms[i]->value + opd->vma)
3412 ++r;
3413
3414 if (r == opd->relocation + relcount)
3415 break;
3416
3417 if (r->address != syms[i]->value + opd->vma)
3418 continue;
3419
3420 if (r->howto->type != R_PPC64_ADDR64)
3421 continue;
3422
3423 sym = *r->sym_ptr_ptr;
3424 if (!sym_exists_at (syms, opdsymend, symcount,
3425 sym->section->id, sym->value + r->addend))
3426 {
3427 size_t len;
3428
3429 *s = *syms[i];
3430 s->flags |= BSF_SYNTHETIC;
3431 s->section = sym->section;
3432 s->value = sym->value + r->addend;
3433 s->name = names;
3434 *names++ = '.';
3435 len = strlen (syms[i]->name);
3436 memcpy (names, syms[i]->name, len + 1);
3437 names += len + 1;
3438 /* Have udata.p point back to the original symbol this
3439 synthetic symbol was derived from. */
3440 s->udata.p = syms[i];
3441 s++;
3442 }
3443 }
3444 }
3445 else
3446 {
3447 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3448 bfd_byte *contents = NULL;
3449 size_t size;
3450 long plt_count = 0;
3451 bfd_vma glink_vma = 0, resolv_vma = 0;
3452 asection *dynamic, *glink = NULL, *relplt = NULL;
3453 arelent *p;
3454
3455 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3456 {
3457 free_contents_and_exit_err:
3458 count = -1;
3459 free_contents_and_exit:
3460 if (contents)
3461 free (contents);
3462 goto done;
3463 }
3464
3465 size = 0;
3466 for (i = secsymend; i < opdsymend; ++i)
3467 {
3468 bfd_vma ent;
3469
3470 /* Ignore bogus symbols. */
3471 if (syms[i]->value > opd->size - 8)
3472 continue;
3473
3474 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3475 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3476 {
3477 ++count;
3478 size += sizeof (asymbol);
3479 size += strlen (syms[i]->name) + 2;
3480 }
3481 }
3482
3483 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3484 if (dyn_count != 0
3485 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3486 {
3487 bfd_byte *dynbuf, *extdyn, *extdynend;
3488 size_t extdynsize;
3489 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3490
3491 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3492 goto free_contents_and_exit_err;
3493
3494 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3495 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3496
3497 extdyn = dynbuf;
3498 extdynend = extdyn + dynamic->size;
3499 for (; extdyn < extdynend; extdyn += extdynsize)
3500 {
3501 Elf_Internal_Dyn dyn;
3502 (*swap_dyn_in) (abfd, extdyn, &dyn);
3503
3504 if (dyn.d_tag == DT_NULL)
3505 break;
3506
3507 if (dyn.d_tag == DT_PPC64_GLINK)
3508 {
3509 /* The first glink stub starts at offset 32; see
3510 comment in ppc64_elf_finish_dynamic_sections. */
3511 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3512 /* The .glink section usually does not survive the final
3513 link; search for the section (usually .text) where the
3514 glink stubs now reside. */
3515 glink = bfd_sections_find_if (abfd, section_covers_vma,
3516 &glink_vma);
3517 break;
3518 }
3519 }
3520
3521 free (dynbuf);
3522 }
3523
3524 if (glink != NULL)
3525 {
3526 /* Determine __glink trampoline by reading the relative branch
3527 from the first glink stub. */
3528 bfd_byte buf[4];
3529 unsigned int off = 0;
3530
3531 while (bfd_get_section_contents (abfd, glink, buf,
3532 glink_vma + off - glink->vma, 4))
3533 {
3534 unsigned int insn = bfd_get_32 (abfd, buf);
3535 insn ^= B_DOT;
3536 if ((insn & ~0x3fffffc) == 0)
3537 {
3538 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3539 break;
3540 }
3541 off += 4;
3542 if (off > 4)
3543 break;
3544 }
3545
3546 if (resolv_vma)
3547 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3548
3549 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3550 if (relplt != NULL)
3551 {
3552 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3553 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3554 goto free_contents_and_exit_err;
3555
3556 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3557 size += plt_count * sizeof (asymbol);
3558
3559 p = relplt->relocation;
3560 for (i = 0; i < plt_count; i++, p++)
3561 {
3562 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3563 if (p->addend != 0)
3564 size += sizeof ("+0x") - 1 + 16;
3565 }
3566 }
3567 }
3568
3569 if (size == 0)
3570 goto free_contents_and_exit;
3571 s = *ret = bfd_malloc (size);
3572 if (s == NULL)
3573 goto free_contents_and_exit_err;
3574
3575 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3576
3577 for (i = secsymend; i < opdsymend; ++i)
3578 {
3579 bfd_vma ent;
3580
3581 if (syms[i]->value > opd->size - 8)
3582 continue;
3583
3584 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3585 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3586 {
3587 long lo, hi;
3588 size_t len;
3589 asection *sec = abfd->sections;
3590
3591 *s = *syms[i];
3592 lo = codesecsym;
3593 hi = codesecsymend;
3594 while (lo < hi)
3595 {
3596 long mid = (lo + hi) >> 1;
3597 if (syms[mid]->section->vma < ent)
3598 lo = mid + 1;
3599 else if (syms[mid]->section->vma > ent)
3600 hi = mid;
3601 else
3602 {
3603 sec = syms[mid]->section;
3604 break;
3605 }
3606 }
3607
3608 if (lo >= hi && lo > codesecsym)
3609 sec = syms[lo - 1]->section;
3610
3611 for (; sec != NULL; sec = sec->next)
3612 {
3613 if (sec->vma > ent)
3614 break;
3615 /* SEC_LOAD may not be set if SEC is from a separate debug
3616 info file. */
3617 if ((sec->flags & SEC_ALLOC) == 0)
3618 break;
3619 if ((sec->flags & SEC_CODE) != 0)
3620 s->section = sec;
3621 }
3622 s->flags |= BSF_SYNTHETIC;
3623 s->value = ent - s->section->vma;
3624 s->name = names;
3625 *names++ = '.';
3626 len = strlen (syms[i]->name);
3627 memcpy (names, syms[i]->name, len + 1);
3628 names += len + 1;
3629 /* Have udata.p point back to the original symbol this
3630 synthetic symbol was derived from. */
3631 s->udata.p = syms[i];
3632 s++;
3633 }
3634 }
3635 free (contents);
3636
3637 if (glink != NULL && relplt != NULL)
3638 {
3639 if (resolv_vma)
3640 {
3641 /* Add a symbol for the main glink trampoline. */
3642 memset (s, 0, sizeof *s);
3643 s->the_bfd = abfd;
3644 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3645 s->section = glink;
3646 s->value = resolv_vma - glink->vma;
3647 s->name = names;
3648 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3649 names += sizeof ("__glink_PLTresolve");
3650 s++;
3651 count++;
3652 }
3653
3654 /* FIXME: It would be very much nicer to put sym@plt on the
3655 stub rather than on the glink branch table entry. The
3656 objdump disassembler would then use a sensible symbol
3657 name on plt calls. The difficulty in doing so is
3658 a) finding the stubs, and,
3659 b) matching stubs against plt entries, and,
3660 c) there can be multiple stubs for a given plt entry.
3661
3662 Solving (a) could be done by code scanning, but older
3663 ppc64 binaries used different stubs to current code.
3664 (b) is the tricky one since you need to known the toc
3665 pointer for at least one function that uses a pic stub to
3666 be able to calculate the plt address referenced.
3667 (c) means gdb would need to set multiple breakpoints (or
3668 find the glink branch itself) when setting breakpoints
3669 for pending shared library loads. */
3670 p = relplt->relocation;
3671 for (i = 0; i < plt_count; i++, p++)
3672 {
3673 size_t len;
3674
3675 *s = **p->sym_ptr_ptr;
3676 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3677 we are defining a symbol, ensure one of them is set. */
3678 if ((s->flags & BSF_LOCAL) == 0)
3679 s->flags |= BSF_GLOBAL;
3680 s->flags |= BSF_SYNTHETIC;
3681 s->section = glink;
3682 s->value = glink_vma - glink->vma;
3683 s->name = names;
3684 s->udata.p = NULL;
3685 len = strlen ((*p->sym_ptr_ptr)->name);
3686 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3687 names += len;
3688 if (p->addend != 0)
3689 {
3690 memcpy (names, "+0x", sizeof ("+0x") - 1);
3691 names += sizeof ("+0x") - 1;
3692 bfd_sprintf_vma (abfd, names, p->addend);
3693 names += strlen (names);
3694 }
3695 memcpy (names, "@plt", sizeof ("@plt"));
3696 names += sizeof ("@plt");
3697 s++;
3698 if (abi < 2)
3699 {
3700 glink_vma += 8;
3701 if (i >= 0x8000)
3702 glink_vma += 4;
3703 }
3704 else
3705 glink_vma += 4;
3706 }
3707 count += plt_count;
3708 }
3709 }
3710
3711 done:
3712 free (syms);
3713 return count;
3714 }
3715 \f
3716 /* The following functions are specific to the ELF linker, while
3717 functions above are used generally. Those named ppc64_elf_* are
3718 called by the main ELF linker code. They appear in this file more
3719 or less in the order in which they are called. eg.
3720 ppc64_elf_check_relocs is called early in the link process,
3721 ppc64_elf_finish_dynamic_sections is one of the last functions
3722 called.
3723
3724 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3725 functions have both a function code symbol and a function descriptor
3726 symbol. A call to foo in a relocatable object file looks like:
3727
3728 . .text
3729 . x:
3730 . bl .foo
3731 . nop
3732
3733 The function definition in another object file might be:
3734
3735 . .section .opd
3736 . foo: .quad .foo
3737 . .quad .TOC.@tocbase
3738 . .quad 0
3739 .
3740 . .text
3741 . .foo: blr
3742
3743 When the linker resolves the call during a static link, the branch
3744 unsurprisingly just goes to .foo and the .opd information is unused.
3745 If the function definition is in a shared library, things are a little
3746 different: The call goes via a plt call stub, the opd information gets
3747 copied to the plt, and the linker patches the nop.
3748
3749 . x:
3750 . bl .foo_stub
3751 . ld 2,40(1)
3752 .
3753 .
3754 . .foo_stub:
3755 . std 2,40(1) # in practice, the call stub
3756 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3757 . addi 11,11,Lfoo@toc@l # this is the general idea
3758 . ld 12,0(11)
3759 . ld 2,8(11)
3760 . mtctr 12
3761 . ld 11,16(11)
3762 . bctr
3763 .
3764 . .section .plt
3765 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3766
3767 The "reloc ()" notation is supposed to indicate that the linker emits
3768 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3769 copying.
3770
3771 What are the difficulties here? Well, firstly, the relocations
3772 examined by the linker in check_relocs are against the function code
3773 sym .foo, while the dynamic relocation in the plt is emitted against
3774 the function descriptor symbol, foo. Somewhere along the line, we need
3775 to carefully copy dynamic link information from one symbol to the other.
3776 Secondly, the generic part of the elf linker will make .foo a dynamic
3777 symbol as is normal for most other backends. We need foo dynamic
3778 instead, at least for an application final link. However, when
3779 creating a shared library containing foo, we need to have both symbols
3780 dynamic so that references to .foo are satisfied during the early
3781 stages of linking. Otherwise the linker might decide to pull in a
3782 definition from some other object, eg. a static library.
3783
3784 Update: As of August 2004, we support a new convention. Function
3785 calls may use the function descriptor symbol, ie. "bl foo". This
3786 behaves exactly as "bl .foo". */
3787
3788 /* Of those relocs that might be copied as dynamic relocs, this function
3789 selects those that must be copied when linking a shared library,
3790 even when the symbol is local. */
3791
3792 static int
3793 must_be_dyn_reloc (struct bfd_link_info *info,
3794 enum elf_ppc64_reloc_type r_type)
3795 {
3796 switch (r_type)
3797 {
3798 default:
3799 return 1;
3800
3801 case R_PPC64_REL32:
3802 case R_PPC64_REL64:
3803 case R_PPC64_REL30:
3804 return 0;
3805
3806 case R_PPC64_TPREL16:
3807 case R_PPC64_TPREL16_LO:
3808 case R_PPC64_TPREL16_HI:
3809 case R_PPC64_TPREL16_HA:
3810 case R_PPC64_TPREL16_DS:
3811 case R_PPC64_TPREL16_LO_DS:
3812 case R_PPC64_TPREL16_HIGH:
3813 case R_PPC64_TPREL16_HIGHA:
3814 case R_PPC64_TPREL16_HIGHER:
3815 case R_PPC64_TPREL16_HIGHERA:
3816 case R_PPC64_TPREL16_HIGHEST:
3817 case R_PPC64_TPREL16_HIGHESTA:
3818 case R_PPC64_TPREL64:
3819 return !bfd_link_executable (info);
3820 }
3821 }
3822
3823 /* Whether an undefined weak symbol should resolve to its link-time
3824 value, even in PIC or PIE objects. */
3825 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3826 ((H)->root.type == bfd_link_hash_undefweak \
3827 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3828 || (INFO)->dynamic_undefined_weak == 0))
3829
3830 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3831 copying dynamic variables from a shared lib into an app's dynbss
3832 section, and instead use a dynamic relocation to point into the
3833 shared lib. With code that gcc generates, it's vital that this be
3834 enabled; In the PowerPC64 ABI, the address of a function is actually
3835 the address of a function descriptor, which resides in the .opd
3836 section. gcc uses the descriptor directly rather than going via the
3837 GOT as some other ABI's do, which means that initialized function
3838 pointers must reference the descriptor. Thus, a function pointer
3839 initialized to the address of a function in a shared library will
3840 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3841 redefines the function descriptor symbol to point to the copy. This
3842 presents a problem as a plt entry for that function is also
3843 initialized from the function descriptor symbol and the copy reloc
3844 may not be initialized first. */
3845 #define ELIMINATE_COPY_RELOCS 1
3846
3847 /* Section name for stubs is the associated section name plus this
3848 string. */
3849 #define STUB_SUFFIX ".stub"
3850
3851 /* Linker stubs.
3852 ppc_stub_long_branch:
3853 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3854 destination, but a 24 bit branch in a stub section will reach.
3855 . b dest
3856
3857 ppc_stub_plt_branch:
3858 Similar to the above, but a 24 bit branch in the stub section won't
3859 reach its destination.
3860 . addis %r11,%r2,xxx@toc@ha
3861 . ld %r12,xxx@toc@l(%r11)
3862 . mtctr %r12
3863 . bctr
3864
3865 ppc_stub_plt_call:
3866 Used to call a function in a shared library. If it so happens that
3867 the plt entry referenced crosses a 64k boundary, then an extra
3868 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3869 . std %r2,40(%r1)
3870 . addis %r11,%r2,xxx@toc@ha
3871 . ld %r12,xxx+0@toc@l(%r11)
3872 . mtctr %r12
3873 . ld %r2,xxx+8@toc@l(%r11)
3874 . ld %r11,xxx+16@toc@l(%r11)
3875 . bctr
3876
3877 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3878 code to adjust the value and save r2 to support multiple toc sections.
3879 A ppc_stub_long_branch with an r2 offset looks like:
3880 . std %r2,40(%r1)
3881 . addis %r2,%r2,off@ha
3882 . addi %r2,%r2,off@l
3883 . b dest
3884
3885 A ppc_stub_plt_branch with an r2 offset looks like:
3886 . std %r2,40(%r1)
3887 . addis %r11,%r2,xxx@toc@ha
3888 . ld %r12,xxx@toc@l(%r11)
3889 . addis %r2,%r2,off@ha
3890 . addi %r2,%r2,off@l
3891 . mtctr %r12
3892 . bctr
3893
3894 In cases where the "addis" instruction would add zero, the "addis" is
3895 omitted and following instructions modified slightly in some cases.
3896 */
3897
3898 enum ppc_stub_type {
3899 ppc_stub_none,
3900 ppc_stub_long_branch,
3901 ppc_stub_long_branch_r2off,
3902 ppc_stub_plt_branch,
3903 ppc_stub_plt_branch_r2off,
3904 ppc_stub_plt_call,
3905 ppc_stub_plt_call_r2save,
3906 ppc_stub_global_entry,
3907 ppc_stub_save_res
3908 };
3909
3910 /* Information on stub grouping. */
3911 struct map_stub
3912 {
3913 /* The stub section. */
3914 asection *stub_sec;
3915 /* This is the section to which stubs in the group will be attached. */
3916 asection *link_sec;
3917 /* Next group. */
3918 struct map_stub *next;
3919 /* Whether to emit a copy of register save/restore functions in this
3920 group. */
3921 int needs_save_res;
3922 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3923 or -1u if no such stub with bctrl exists. */
3924 unsigned int tls_get_addr_opt_bctrl;
3925 };
3926
3927 struct ppc_stub_hash_entry {
3928
3929 /* Base hash table entry structure. */
3930 struct bfd_hash_entry root;
3931
3932 enum ppc_stub_type stub_type;
3933
3934 /* Group information. */
3935 struct map_stub *group;
3936
3937 /* Offset within stub_sec of the beginning of this stub. */
3938 bfd_vma stub_offset;
3939
3940 /* Given the symbol's value and its section we can determine its final
3941 value when building the stubs (so the stub knows where to jump. */
3942 bfd_vma target_value;
3943 asection *target_section;
3944
3945 /* The symbol table entry, if any, that this was derived from. */
3946 struct ppc_link_hash_entry *h;
3947 struct plt_entry *plt_ent;
3948
3949 /* Symbol st_other. */
3950 unsigned char other;
3951 };
3952
3953 struct ppc_branch_hash_entry {
3954
3955 /* Base hash table entry structure. */
3956 struct bfd_hash_entry root;
3957
3958 /* Offset within branch lookup table. */
3959 unsigned int offset;
3960
3961 /* Generation marker. */
3962 unsigned int iter;
3963 };
3964
3965 /* Used to track dynamic relocations for local symbols. */
3966 struct ppc_dyn_relocs
3967 {
3968 struct ppc_dyn_relocs *next;
3969
3970 /* The input section of the reloc. */
3971 asection *sec;
3972
3973 /* Total number of relocs copied for the input section. */
3974 unsigned int count : 31;
3975
3976 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3977 unsigned int ifunc : 1;
3978 };
3979
3980 struct ppc_link_hash_entry
3981 {
3982 struct elf_link_hash_entry elf;
3983
3984 union {
3985 /* A pointer to the most recently used stub hash entry against this
3986 symbol. */
3987 struct ppc_stub_hash_entry *stub_cache;
3988
3989 /* A pointer to the next symbol starting with a '.' */
3990 struct ppc_link_hash_entry *next_dot_sym;
3991 } u;
3992
3993 /* Track dynamic relocs copied for this symbol. */
3994 struct elf_dyn_relocs *dyn_relocs;
3995
3996 /* Chain of aliases referring to a weakdef. */
3997 struct ppc_link_hash_entry *weakref;
3998
3999 /* Link between function code and descriptor symbols. */
4000 struct ppc_link_hash_entry *oh;
4001
4002 /* Flag function code and descriptor symbols. */
4003 unsigned int is_func:1;
4004 unsigned int is_func_descriptor:1;
4005 unsigned int fake:1;
4006
4007 /* Whether global opd/toc sym has been adjusted or not.
4008 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4009 should be set for all globals defined in any opd/toc section. */
4010 unsigned int adjust_done:1;
4011
4012 /* Set if this is an out-of-line register save/restore function,
4013 with non-standard calling convention. */
4014 unsigned int save_res:1;
4015
4016 /* Set if a duplicate symbol with non-zero localentry is detected,
4017 even when the duplicate symbol does not provide a definition. */
4018 unsigned int non_zero_localentry:1;
4019
4020 /* Contexts in which symbol is used in the GOT (or TOC).
4021 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4022 corresponding relocs are encountered during check_relocs.
4023 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4024 indicate the corresponding GOT entry type is not needed.
4025 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4026 a TPREL one. We use a separate flag rather than setting TPREL
4027 just for convenience in distinguishing the two cases. */
4028 #define TLS_GD 1 /* GD reloc. */
4029 #define TLS_LD 2 /* LD reloc. */
4030 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4031 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4032 #define TLS_TLS 16 /* Any TLS reloc. */
4033 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4034 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4035 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4036 unsigned char tls_mask;
4037 };
4038
4039 /* ppc64 ELF linker hash table. */
4040
4041 struct ppc_link_hash_table
4042 {
4043 struct elf_link_hash_table elf;
4044
4045 /* The stub hash table. */
4046 struct bfd_hash_table stub_hash_table;
4047
4048 /* Another hash table for plt_branch stubs. */
4049 struct bfd_hash_table branch_hash_table;
4050
4051 /* Hash table for function prologue tocsave. */
4052 htab_t tocsave_htab;
4053
4054 /* Various options and other info passed from the linker. */
4055 struct ppc64_elf_params *params;
4056
4057 /* The size of sec_info below. */
4058 unsigned int sec_info_arr_size;
4059
4060 /* Per-section array of extra section info. Done this way rather
4061 than as part of ppc64_elf_section_data so we have the info for
4062 non-ppc64 sections. */
4063 struct
4064 {
4065 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4066 bfd_vma toc_off;
4067
4068 union
4069 {
4070 /* The section group that this section belongs to. */
4071 struct map_stub *group;
4072 /* A temp section list pointer. */
4073 asection *list;
4074 } u;
4075 } *sec_info;
4076
4077 /* Linked list of groups. */
4078 struct map_stub *group;
4079
4080 /* Temp used when calculating TOC pointers. */
4081 bfd_vma toc_curr;
4082 bfd *toc_bfd;
4083 asection *toc_first_sec;
4084
4085 /* Used when adding symbols. */
4086 struct ppc_link_hash_entry *dot_syms;
4087
4088 /* Shortcuts to get to dynamic linker sections. */
4089 asection *glink;
4090 asection *sfpr;
4091 asection *brlt;
4092 asection *relbrlt;
4093 asection *glink_eh_frame;
4094
4095 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4096 struct ppc_link_hash_entry *tls_get_addr;
4097 struct ppc_link_hash_entry *tls_get_addr_fd;
4098
4099 /* The size of reliplt used by got entry relocs. */
4100 bfd_size_type got_reli_size;
4101
4102 /* Statistics. */
4103 unsigned long stub_count[ppc_stub_global_entry];
4104
4105 /* Number of stubs against global syms. */
4106 unsigned long stub_globals;
4107
4108 /* Set if we're linking code with function descriptors. */
4109 unsigned int opd_abi:1;
4110
4111 /* Support for multiple toc sections. */
4112 unsigned int do_multi_toc:1;
4113 unsigned int multi_toc_needed:1;
4114 unsigned int second_toc_pass:1;
4115 unsigned int do_toc_opt:1;
4116
4117 /* Set on error. */
4118 unsigned int stub_error:1;
4119
4120 /* Whether func_desc_adjust needs to be run over symbols. */
4121 unsigned int need_func_desc_adj:1;
4122
4123 /* Whether there exist local gnu indirect function resolvers,
4124 referenced by dynamic relocations. */
4125 unsigned int local_ifunc_resolver:1;
4126 unsigned int maybe_local_ifunc_resolver:1;
4127
4128 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4129 unsigned int has_plt_localentry0:1;
4130
4131 /* Incremented every time we size stubs. */
4132 unsigned int stub_iteration;
4133
4134 /* Small local sym cache. */
4135 struct sym_cache sym_cache;
4136 };
4137
4138 /* Rename some of the generic section flags to better document how they
4139 are used here. */
4140
4141 /* Nonzero if this section has TLS related relocations. */
4142 #define has_tls_reloc sec_flg0
4143
4144 /* Nonzero if this section has a call to __tls_get_addr. */
4145 #define has_tls_get_addr_call sec_flg1
4146
4147 /* Nonzero if this section has any toc or got relocs. */
4148 #define has_toc_reloc sec_flg2
4149
4150 /* Nonzero if this section has a call to another section that uses
4151 the toc or got. */
4152 #define makes_toc_func_call sec_flg3
4153
4154 /* Recursion protection when determining above flag. */
4155 #define call_check_in_progress sec_flg4
4156 #define call_check_done sec_flg5
4157
4158 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4159
4160 #define ppc_hash_table(p) \
4161 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4162 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4163
4164 #define ppc_stub_hash_lookup(table, string, create, copy) \
4165 ((struct ppc_stub_hash_entry *) \
4166 bfd_hash_lookup ((table), (string), (create), (copy)))
4167
4168 #define ppc_branch_hash_lookup(table, string, create, copy) \
4169 ((struct ppc_branch_hash_entry *) \
4170 bfd_hash_lookup ((table), (string), (create), (copy)))
4171
4172 /* Create an entry in the stub hash table. */
4173
4174 static struct bfd_hash_entry *
4175 stub_hash_newfunc (struct bfd_hash_entry *entry,
4176 struct bfd_hash_table *table,
4177 const char *string)
4178 {
4179 /* Allocate the structure if it has not already been allocated by a
4180 subclass. */
4181 if (entry == NULL)
4182 {
4183 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4184 if (entry == NULL)
4185 return entry;
4186 }
4187
4188 /* Call the allocation method of the superclass. */
4189 entry = bfd_hash_newfunc (entry, table, string);
4190 if (entry != NULL)
4191 {
4192 struct ppc_stub_hash_entry *eh;
4193
4194 /* Initialize the local fields. */
4195 eh = (struct ppc_stub_hash_entry *) entry;
4196 eh->stub_type = ppc_stub_none;
4197 eh->group = NULL;
4198 eh->stub_offset = 0;
4199 eh->target_value = 0;
4200 eh->target_section = NULL;
4201 eh->h = NULL;
4202 eh->plt_ent = NULL;
4203 eh->other = 0;
4204 }
4205
4206 return entry;
4207 }
4208
4209 /* Create an entry in the branch hash table. */
4210
4211 static struct bfd_hash_entry *
4212 branch_hash_newfunc (struct bfd_hash_entry *entry,
4213 struct bfd_hash_table *table,
4214 const char *string)
4215 {
4216 /* Allocate the structure if it has not already been allocated by a
4217 subclass. */
4218 if (entry == NULL)
4219 {
4220 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4221 if (entry == NULL)
4222 return entry;
4223 }
4224
4225 /* Call the allocation method of the superclass. */
4226 entry = bfd_hash_newfunc (entry, table, string);
4227 if (entry != NULL)
4228 {
4229 struct ppc_branch_hash_entry *eh;
4230
4231 /* Initialize the local fields. */
4232 eh = (struct ppc_branch_hash_entry *) entry;
4233 eh->offset = 0;
4234 eh->iter = 0;
4235 }
4236
4237 return entry;
4238 }
4239
4240 /* Create an entry in a ppc64 ELF linker hash table. */
4241
4242 static struct bfd_hash_entry *
4243 link_hash_newfunc (struct bfd_hash_entry *entry,
4244 struct bfd_hash_table *table,
4245 const char *string)
4246 {
4247 /* Allocate the structure if it has not already been allocated by a
4248 subclass. */
4249 if (entry == NULL)
4250 {
4251 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4252 if (entry == NULL)
4253 return entry;
4254 }
4255
4256 /* Call the allocation method of the superclass. */
4257 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4258 if (entry != NULL)
4259 {
4260 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4261
4262 memset (&eh->u.stub_cache, 0,
4263 (sizeof (struct ppc_link_hash_entry)
4264 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4265
4266 /* When making function calls, old ABI code references function entry
4267 points (dot symbols), while new ABI code references the function
4268 descriptor symbol. We need to make any combination of reference and
4269 definition work together, without breaking archive linking.
4270
4271 For a defined function "foo" and an undefined call to "bar":
4272 An old object defines "foo" and ".foo", references ".bar" (possibly
4273 "bar" too).
4274 A new object defines "foo" and references "bar".
4275
4276 A new object thus has no problem with its undefined symbols being
4277 satisfied by definitions in an old object. On the other hand, the
4278 old object won't have ".bar" satisfied by a new object.
4279
4280 Keep a list of newly added dot-symbols. */
4281
4282 if (string[0] == '.')
4283 {
4284 struct ppc_link_hash_table *htab;
4285
4286 htab = (struct ppc_link_hash_table *) table;
4287 eh->u.next_dot_sym = htab->dot_syms;
4288 htab->dot_syms = eh;
4289 }
4290 }
4291
4292 return entry;
4293 }
4294
4295 struct tocsave_entry {
4296 asection *sec;
4297 bfd_vma offset;
4298 };
4299
4300 static hashval_t
4301 tocsave_htab_hash (const void *p)
4302 {
4303 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4304 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4305 }
4306
4307 static int
4308 tocsave_htab_eq (const void *p1, const void *p2)
4309 {
4310 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4311 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4312 return e1->sec == e2->sec && e1->offset == e2->offset;
4313 }
4314
4315 /* Destroy a ppc64 ELF linker hash table. */
4316
4317 static void
4318 ppc64_elf_link_hash_table_free (bfd *obfd)
4319 {
4320 struct ppc_link_hash_table *htab;
4321
4322 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4323 if (htab->tocsave_htab)
4324 htab_delete (htab->tocsave_htab);
4325 bfd_hash_table_free (&htab->branch_hash_table);
4326 bfd_hash_table_free (&htab->stub_hash_table);
4327 _bfd_elf_link_hash_table_free (obfd);
4328 }
4329
4330 /* Create a ppc64 ELF linker hash table. */
4331
4332 static struct bfd_link_hash_table *
4333 ppc64_elf_link_hash_table_create (bfd *abfd)
4334 {
4335 struct ppc_link_hash_table *htab;
4336 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4337
4338 htab = bfd_zmalloc (amt);
4339 if (htab == NULL)
4340 return NULL;
4341
4342 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4343 sizeof (struct ppc_link_hash_entry),
4344 PPC64_ELF_DATA))
4345 {
4346 free (htab);
4347 return NULL;
4348 }
4349
4350 /* Init the stub hash table too. */
4351 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4352 sizeof (struct ppc_stub_hash_entry)))
4353 {
4354 _bfd_elf_link_hash_table_free (abfd);
4355 return NULL;
4356 }
4357
4358 /* And the branch hash table. */
4359 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4360 sizeof (struct ppc_branch_hash_entry)))
4361 {
4362 bfd_hash_table_free (&htab->stub_hash_table);
4363 _bfd_elf_link_hash_table_free (abfd);
4364 return NULL;
4365 }
4366
4367 htab->tocsave_htab = htab_try_create (1024,
4368 tocsave_htab_hash,
4369 tocsave_htab_eq,
4370 NULL);
4371 if (htab->tocsave_htab == NULL)
4372 {
4373 ppc64_elf_link_hash_table_free (abfd);
4374 return NULL;
4375 }
4376 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4377
4378 /* Initializing two fields of the union is just cosmetic. We really
4379 only care about glist, but when compiled on a 32-bit host the
4380 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4381 debugger inspection of these fields look nicer. */
4382 htab->elf.init_got_refcount.refcount = 0;
4383 htab->elf.init_got_refcount.glist = NULL;
4384 htab->elf.init_plt_refcount.refcount = 0;
4385 htab->elf.init_plt_refcount.glist = NULL;
4386 htab->elf.init_got_offset.offset = 0;
4387 htab->elf.init_got_offset.glist = NULL;
4388 htab->elf.init_plt_offset.offset = 0;
4389 htab->elf.init_plt_offset.glist = NULL;
4390
4391 return &htab->elf.root;
4392 }
4393
4394 /* Create sections for linker generated code. */
4395
4396 static bfd_boolean
4397 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4398 {
4399 struct ppc_link_hash_table *htab;
4400 flagword flags;
4401
4402 htab = ppc_hash_table (info);
4403
4404 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4405 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4406 if (htab->params->save_restore_funcs)
4407 {
4408 /* Create .sfpr for code to save and restore fp regs. */
4409 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4410 flags);
4411 if (htab->sfpr == NULL
4412 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4413 return FALSE;
4414 }
4415
4416 if (bfd_link_relocatable (info))
4417 return TRUE;
4418
4419 /* Create .glink for lazy dynamic linking support. */
4420 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4421 flags);
4422 if (htab->glink == NULL
4423 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4424 return FALSE;
4425
4426 if (!info->no_ld_generated_unwind_info)
4427 {
4428 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4429 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4430 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4431 ".eh_frame",
4432 flags);
4433 if (htab->glink_eh_frame == NULL
4434 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4435 return FALSE;
4436 }
4437
4438 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4439 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4440 if (htab->elf.iplt == NULL
4441 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4442 return FALSE;
4443
4444 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4445 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4446 htab->elf.irelplt
4447 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4448 if (htab->elf.irelplt == NULL
4449 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4450 return FALSE;
4451
4452 /* Create branch lookup table for plt_branch stubs. */
4453 flags = (SEC_ALLOC | SEC_LOAD
4454 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4455 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4456 flags);
4457 if (htab->brlt == NULL
4458 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4459 return FALSE;
4460
4461 if (!bfd_link_pic (info))
4462 return TRUE;
4463
4464 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4465 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4466 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4467 ".rela.branch_lt",
4468 flags);
4469 if (htab->relbrlt == NULL
4470 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4471 return FALSE;
4472
4473 return TRUE;
4474 }
4475
4476 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4477
4478 bfd_boolean
4479 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4480 struct ppc64_elf_params *params)
4481 {
4482 struct ppc_link_hash_table *htab;
4483
4484 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4485
4486 /* Always hook our dynamic sections into the first bfd, which is the
4487 linker created stub bfd. This ensures that the GOT header is at
4488 the start of the output TOC section. */
4489 htab = ppc_hash_table (info);
4490 htab->elf.dynobj = params->stub_bfd;
4491 htab->params = params;
4492
4493 return create_linkage_sections (htab->elf.dynobj, info);
4494 }
4495
4496 /* Build a name for an entry in the stub hash table. */
4497
4498 static char *
4499 ppc_stub_name (const asection *input_section,
4500 const asection *sym_sec,
4501 const struct ppc_link_hash_entry *h,
4502 const Elf_Internal_Rela *rel)
4503 {
4504 char *stub_name;
4505 ssize_t len;
4506
4507 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4508 offsets from a sym as a branch target? In fact, we could
4509 probably assume the addend is always zero. */
4510 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4511
4512 if (h)
4513 {
4514 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4515 stub_name = bfd_malloc (len);
4516 if (stub_name == NULL)
4517 return stub_name;
4518
4519 len = sprintf (stub_name, "%08x.%s+%x",
4520 input_section->id & 0xffffffff,
4521 h->elf.root.root.string,
4522 (int) rel->r_addend & 0xffffffff);
4523 }
4524 else
4525 {
4526 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4527 stub_name = bfd_malloc (len);
4528 if (stub_name == NULL)
4529 return stub_name;
4530
4531 len = sprintf (stub_name, "%08x.%x:%x+%x",
4532 input_section->id & 0xffffffff,
4533 sym_sec->id & 0xffffffff,
4534 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4535 (int) rel->r_addend & 0xffffffff);
4536 }
4537 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4538 stub_name[len - 2] = 0;
4539 return stub_name;
4540 }
4541
4542 /* Look up an entry in the stub hash. Stub entries are cached because
4543 creating the stub name takes a bit of time. */
4544
4545 static struct ppc_stub_hash_entry *
4546 ppc_get_stub_entry (const asection *input_section,
4547 const asection *sym_sec,
4548 struct ppc_link_hash_entry *h,
4549 const Elf_Internal_Rela *rel,
4550 struct ppc_link_hash_table *htab)
4551 {
4552 struct ppc_stub_hash_entry *stub_entry;
4553 struct map_stub *group;
4554
4555 /* If this input section is part of a group of sections sharing one
4556 stub section, then use the id of the first section in the group.
4557 Stub names need to include a section id, as there may well be
4558 more than one stub used to reach say, printf, and we need to
4559 distinguish between them. */
4560 group = htab->sec_info[input_section->id].u.group;
4561 if (group == NULL)
4562 return NULL;
4563
4564 if (h != NULL && h->u.stub_cache != NULL
4565 && h->u.stub_cache->h == h
4566 && h->u.stub_cache->group == group)
4567 {
4568 stub_entry = h->u.stub_cache;
4569 }
4570 else
4571 {
4572 char *stub_name;
4573
4574 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4575 if (stub_name == NULL)
4576 return NULL;
4577
4578 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4579 stub_name, FALSE, FALSE);
4580 if (h != NULL)
4581 h->u.stub_cache = stub_entry;
4582
4583 free (stub_name);
4584 }
4585
4586 return stub_entry;
4587 }
4588
4589 /* Add a new stub entry to the stub hash. Not all fields of the new
4590 stub entry are initialised. */
4591
4592 static struct ppc_stub_hash_entry *
4593 ppc_add_stub (const char *stub_name,
4594 asection *section,
4595 struct bfd_link_info *info)
4596 {
4597 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4598 struct map_stub *group;
4599 asection *link_sec;
4600 asection *stub_sec;
4601 struct ppc_stub_hash_entry *stub_entry;
4602
4603 group = htab->sec_info[section->id].u.group;
4604 link_sec = group->link_sec;
4605 stub_sec = group->stub_sec;
4606 if (stub_sec == NULL)
4607 {
4608 size_t namelen;
4609 bfd_size_type len;
4610 char *s_name;
4611
4612 namelen = strlen (link_sec->name);
4613 len = namelen + sizeof (STUB_SUFFIX);
4614 s_name = bfd_alloc (htab->params->stub_bfd, len);
4615 if (s_name == NULL)
4616 return NULL;
4617
4618 memcpy (s_name, link_sec->name, namelen);
4619 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4620 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4621 if (stub_sec == NULL)
4622 return NULL;
4623 group->stub_sec = stub_sec;
4624 }
4625
4626 /* Enter this entry into the linker stub hash table. */
4627 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4628 TRUE, FALSE);
4629 if (stub_entry == NULL)
4630 {
4631 /* xgettext:c-format */
4632 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4633 section->owner, stub_name);
4634 return NULL;
4635 }
4636
4637 stub_entry->group = group;
4638 stub_entry->stub_offset = 0;
4639 return stub_entry;
4640 }
4641
4642 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4643 not already done. */
4644
4645 static bfd_boolean
4646 create_got_section (bfd *abfd, struct bfd_link_info *info)
4647 {
4648 asection *got, *relgot;
4649 flagword flags;
4650 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4651
4652 if (!is_ppc64_elf (abfd))
4653 return FALSE;
4654 if (htab == NULL)
4655 return FALSE;
4656
4657 if (!htab->elf.sgot
4658 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4659 return FALSE;
4660
4661 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4662 | SEC_LINKER_CREATED);
4663
4664 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4665 if (!got
4666 || !bfd_set_section_alignment (abfd, got, 3))
4667 return FALSE;
4668
4669 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4670 flags | SEC_READONLY);
4671 if (!relgot
4672 || ! bfd_set_section_alignment (abfd, relgot, 3))
4673 return FALSE;
4674
4675 ppc64_elf_tdata (abfd)->got = got;
4676 ppc64_elf_tdata (abfd)->relgot = relgot;
4677 return TRUE;
4678 }
4679
4680 /* Follow indirect and warning symbol links. */
4681
4682 static inline struct bfd_link_hash_entry *
4683 follow_link (struct bfd_link_hash_entry *h)
4684 {
4685 while (h->type == bfd_link_hash_indirect
4686 || h->type == bfd_link_hash_warning)
4687 h = h->u.i.link;
4688 return h;
4689 }
4690
4691 static inline struct elf_link_hash_entry *
4692 elf_follow_link (struct elf_link_hash_entry *h)
4693 {
4694 return (struct elf_link_hash_entry *) follow_link (&h->root);
4695 }
4696
4697 static inline struct ppc_link_hash_entry *
4698 ppc_follow_link (struct ppc_link_hash_entry *h)
4699 {
4700 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4701 }
4702
4703 /* Merge PLT info on FROM with that on TO. */
4704
4705 static void
4706 move_plt_plist (struct ppc_link_hash_entry *from,
4707 struct ppc_link_hash_entry *to)
4708 {
4709 if (from->elf.plt.plist != NULL)
4710 {
4711 if (to->elf.plt.plist != NULL)
4712 {
4713 struct plt_entry **entp;
4714 struct plt_entry *ent;
4715
4716 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4717 {
4718 struct plt_entry *dent;
4719
4720 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4721 if (dent->addend == ent->addend)
4722 {
4723 dent->plt.refcount += ent->plt.refcount;
4724 *entp = ent->next;
4725 break;
4726 }
4727 if (dent == NULL)
4728 entp = &ent->next;
4729 }
4730 *entp = to->elf.plt.plist;
4731 }
4732
4733 to->elf.plt.plist = from->elf.plt.plist;
4734 from->elf.plt.plist = NULL;
4735 }
4736 }
4737
4738 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4739
4740 static void
4741 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4742 struct elf_link_hash_entry *dir,
4743 struct elf_link_hash_entry *ind)
4744 {
4745 struct ppc_link_hash_entry *edir, *eind;
4746
4747 edir = (struct ppc_link_hash_entry *) dir;
4748 eind = (struct ppc_link_hash_entry *) ind;
4749
4750 edir->is_func |= eind->is_func;
4751 edir->is_func_descriptor |= eind->is_func_descriptor;
4752 edir->tls_mask |= eind->tls_mask;
4753 if (eind->oh != NULL)
4754 edir->oh = ppc_follow_link (eind->oh);
4755
4756 /* If called to transfer flags for a weakdef during processing
4757 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4758 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4759 if (!(ELIMINATE_COPY_RELOCS
4760 && eind->elf.root.type != bfd_link_hash_indirect
4761 && edir->elf.dynamic_adjusted))
4762 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4763
4764 if (edir->elf.versioned != versioned_hidden)
4765 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4766 edir->elf.ref_regular |= eind->elf.ref_regular;
4767 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4768 edir->elf.needs_plt |= eind->elf.needs_plt;
4769 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4770
4771 /* If we were called to copy over info for a weak sym, don't copy
4772 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4773 in order to simplify readonly_dynrelocs and save a field in the
4774 symbol hash entry, but that means dyn_relocs can't be used in any
4775 tests about a specific symbol, or affect other symbol flags which
4776 are then tested.
4777 Chain weakdefs so we can get from the weakdef back to an alias.
4778 The list is circular so that we don't need to use u.weakdef as
4779 well as this list to look at all aliases. */
4780 if (eind->elf.root.type != bfd_link_hash_indirect)
4781 {
4782 struct ppc_link_hash_entry *cur, *add, *next;
4783
4784 add = eind;
4785 do
4786 {
4787 cur = edir->weakref;
4788 if (cur != NULL)
4789 {
4790 do
4791 {
4792 /* We can be called twice for the same symbols.
4793 Don't make multiple loops. */
4794 if (cur == add)
4795 return;
4796 cur = cur->weakref;
4797 } while (cur != edir);
4798 }
4799 next = add->weakref;
4800 if (cur != add)
4801 {
4802 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4803 edir->weakref = add;
4804 }
4805 add = next;
4806 } while (add != NULL && add != eind);
4807 return;
4808 }
4809
4810 /* Copy over any dynamic relocs we may have on the indirect sym. */
4811 if (eind->dyn_relocs != NULL)
4812 {
4813 if (edir->dyn_relocs != NULL)
4814 {
4815 struct elf_dyn_relocs **pp;
4816 struct elf_dyn_relocs *p;
4817
4818 /* Add reloc counts against the indirect sym to the direct sym
4819 list. Merge any entries against the same section. */
4820 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4821 {
4822 struct elf_dyn_relocs *q;
4823
4824 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4825 if (q->sec == p->sec)
4826 {
4827 q->pc_count += p->pc_count;
4828 q->count += p->count;
4829 *pp = p->next;
4830 break;
4831 }
4832 if (q == NULL)
4833 pp = &p->next;
4834 }
4835 *pp = edir->dyn_relocs;
4836 }
4837
4838 edir->dyn_relocs = eind->dyn_relocs;
4839 eind->dyn_relocs = NULL;
4840 }
4841
4842 /* Copy over got entries that we may have already seen to the
4843 symbol which just became indirect. */
4844 if (eind->elf.got.glist != NULL)
4845 {
4846 if (edir->elf.got.glist != NULL)
4847 {
4848 struct got_entry **entp;
4849 struct got_entry *ent;
4850
4851 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4852 {
4853 struct got_entry *dent;
4854
4855 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4856 if (dent->addend == ent->addend
4857 && dent->owner == ent->owner
4858 && dent->tls_type == ent->tls_type)
4859 {
4860 dent->got.refcount += ent->got.refcount;
4861 *entp = ent->next;
4862 break;
4863 }
4864 if (dent == NULL)
4865 entp = &ent->next;
4866 }
4867 *entp = edir->elf.got.glist;
4868 }
4869
4870 edir->elf.got.glist = eind->elf.got.glist;
4871 eind->elf.got.glist = NULL;
4872 }
4873
4874 /* And plt entries. */
4875 move_plt_plist (eind, edir);
4876
4877 if (eind->elf.dynindx != -1)
4878 {
4879 if (edir->elf.dynindx != -1)
4880 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4881 edir->elf.dynstr_index);
4882 edir->elf.dynindx = eind->elf.dynindx;
4883 edir->elf.dynstr_index = eind->elf.dynstr_index;
4884 eind->elf.dynindx = -1;
4885 eind->elf.dynstr_index = 0;
4886 }
4887 }
4888
4889 /* Find the function descriptor hash entry from the given function code
4890 hash entry FH. Link the entries via their OH fields. */
4891
4892 static struct ppc_link_hash_entry *
4893 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4894 {
4895 struct ppc_link_hash_entry *fdh = fh->oh;
4896
4897 if (fdh == NULL)
4898 {
4899 const char *fd_name = fh->elf.root.root.string + 1;
4900
4901 fdh = (struct ppc_link_hash_entry *)
4902 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4903 if (fdh == NULL)
4904 return fdh;
4905
4906 fdh->is_func_descriptor = 1;
4907 fdh->oh = fh;
4908 fh->is_func = 1;
4909 fh->oh = fdh;
4910 }
4911
4912 fdh = ppc_follow_link (fdh);
4913 fdh->is_func_descriptor = 1;
4914 fdh->oh = fh;
4915 return fdh;
4916 }
4917
4918 /* Make a fake function descriptor sym for the undefined code sym FH. */
4919
4920 static struct ppc_link_hash_entry *
4921 make_fdh (struct bfd_link_info *info,
4922 struct ppc_link_hash_entry *fh)
4923 {
4924 bfd *abfd = fh->elf.root.u.undef.abfd;
4925 struct bfd_link_hash_entry *bh = NULL;
4926 struct ppc_link_hash_entry *fdh;
4927 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4928 ? BSF_WEAK
4929 : BSF_GLOBAL);
4930
4931 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4932 fh->elf.root.root.string + 1,
4933 flags, bfd_und_section_ptr, 0,
4934 NULL, FALSE, FALSE, &bh))
4935 return NULL;
4936
4937 fdh = (struct ppc_link_hash_entry *) bh;
4938 fdh->elf.non_elf = 0;
4939 fdh->fake = 1;
4940 fdh->is_func_descriptor = 1;
4941 fdh->oh = fh;
4942 fh->is_func = 1;
4943 fh->oh = fdh;
4944 return fdh;
4945 }
4946
4947 /* Fix function descriptor symbols defined in .opd sections to be
4948 function type. */
4949
4950 static bfd_boolean
4951 ppc64_elf_add_symbol_hook (bfd *ibfd,
4952 struct bfd_link_info *info,
4953 Elf_Internal_Sym *isym,
4954 const char **name,
4955 flagword *flags ATTRIBUTE_UNUSED,
4956 asection **sec,
4957 bfd_vma *value)
4958 {
4959 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4960 && (ibfd->flags & DYNAMIC) == 0
4961 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4962 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4963
4964 if (*sec != NULL
4965 && strcmp ((*sec)->name, ".opd") == 0)
4966 {
4967 asection *code_sec;
4968
4969 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4970 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4971 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4972
4973 /* If the symbol is a function defined in .opd, and the function
4974 code is in a discarded group, let it appear to be undefined. */
4975 if (!bfd_link_relocatable (info)
4976 && (*sec)->reloc_count != 0
4977 && opd_entry_value (*sec, *value, &code_sec, NULL,
4978 FALSE) != (bfd_vma) -1
4979 && discarded_section (code_sec))
4980 {
4981 *sec = bfd_und_section_ptr;
4982 isym->st_shndx = SHN_UNDEF;
4983 }
4984 }
4985 else if (*sec != NULL
4986 && strcmp ((*sec)->name, ".toc") == 0
4987 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4988 {
4989 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4990 if (htab != NULL)
4991 htab->params->object_in_toc = 1;
4992 }
4993
4994 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4995 {
4996 if (abiversion (ibfd) == 0)
4997 set_abiversion (ibfd, 2);
4998 else if (abiversion (ibfd) == 1)
4999 {
5000 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5001 " for ABI version 1\n"), name);
5002 bfd_set_error (bfd_error_bad_value);
5003 return FALSE;
5004 }
5005 }
5006
5007 return TRUE;
5008 }
5009
5010 /* Merge non-visibility st_other attributes: local entry point. */
5011
5012 static void
5013 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5014 const Elf_Internal_Sym *isym,
5015 bfd_boolean definition,
5016 bfd_boolean dynamic)
5017 {
5018 if (definition && (!dynamic || !h->def_regular))
5019 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5020 | ELF_ST_VISIBILITY (h->other));
5021 }
5022
5023 /* Hook called on merging a symbol. We use this to clear "fake" since
5024 we now have a real symbol. */
5025
5026 static bfd_boolean
5027 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5028 const Elf_Internal_Sym *isym,
5029 asection **psec ATTRIBUTE_UNUSED,
5030 bfd_boolean newdef ATTRIBUTE_UNUSED,
5031 bfd_boolean olddef ATTRIBUTE_UNUSED,
5032 bfd *oldbfd ATTRIBUTE_UNUSED,
5033 const asection *oldsec ATTRIBUTE_UNUSED)
5034 {
5035 ((struct ppc_link_hash_entry *) h)->fake = 0;
5036 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5037 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5038 return TRUE;
5039 }
5040
5041 /* This function makes an old ABI object reference to ".bar" cause the
5042 inclusion of a new ABI object archive that defines "bar".
5043 NAME is a symbol defined in an archive. Return a symbol in the hash
5044 table that might be satisfied by the archive symbols. */
5045
5046 static struct elf_link_hash_entry *
5047 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5048 struct bfd_link_info *info,
5049 const char *name)
5050 {
5051 struct elf_link_hash_entry *h;
5052 char *dot_name;
5053 size_t len;
5054
5055 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5056 if (h != NULL
5057 /* Don't return this sym if it is a fake function descriptor
5058 created by add_symbol_adjust. */
5059 && !((struct ppc_link_hash_entry *) h)->fake)
5060 return h;
5061
5062 if (name[0] == '.')
5063 return h;
5064
5065 len = strlen (name);
5066 dot_name = bfd_alloc (abfd, len + 2);
5067 if (dot_name == NULL)
5068 return (struct elf_link_hash_entry *) 0 - 1;
5069 dot_name[0] = '.';
5070 memcpy (dot_name + 1, name, len + 1);
5071 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5072 bfd_release (abfd, dot_name);
5073 return h;
5074 }
5075
5076 /* This function satisfies all old ABI object references to ".bar" if a
5077 new ABI object defines "bar". Well, at least, undefined dot symbols
5078 are made weak. This stops later archive searches from including an
5079 object if we already have a function descriptor definition. It also
5080 prevents the linker complaining about undefined symbols.
5081 We also check and correct mismatched symbol visibility here. The
5082 most restrictive visibility of the function descriptor and the
5083 function entry symbol is used. */
5084
5085 static bfd_boolean
5086 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5087 {
5088 struct ppc_link_hash_table *htab;
5089 struct ppc_link_hash_entry *fdh;
5090
5091 if (eh->elf.root.type == bfd_link_hash_warning)
5092 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5093
5094 if (eh->elf.root.type == bfd_link_hash_indirect)
5095 return TRUE;
5096
5097 if (eh->elf.root.root.string[0] != '.')
5098 abort ();
5099
5100 htab = ppc_hash_table (info);
5101 if (htab == NULL)
5102 return FALSE;
5103
5104 fdh = lookup_fdh (eh, htab);
5105 if (fdh == NULL
5106 && !bfd_link_relocatable (info)
5107 && (eh->elf.root.type == bfd_link_hash_undefined
5108 || eh->elf.root.type == bfd_link_hash_undefweak)
5109 && eh->elf.ref_regular)
5110 {
5111 /* Make an undefined function descriptor sym, in order to
5112 pull in an --as-needed shared lib. Archives are handled
5113 elsewhere. */
5114 fdh = make_fdh (info, eh);
5115 if (fdh == NULL)
5116 return FALSE;
5117 }
5118
5119 if (fdh != NULL)
5120 {
5121 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5122 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5123
5124 /* Make both descriptor and entry symbol have the most
5125 constraining visibility of either symbol. */
5126 if (entry_vis < descr_vis)
5127 fdh->elf.other += entry_vis - descr_vis;
5128 else if (entry_vis > descr_vis)
5129 eh->elf.other += descr_vis - entry_vis;
5130
5131 /* Propagate reference flags from entry symbol to function
5132 descriptor symbol. */
5133 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5134 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5135 fdh->elf.ref_regular |= eh->elf.ref_regular;
5136 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5137
5138 if (!fdh->elf.forced_local
5139 && fdh->elf.dynindx == -1
5140 && fdh->elf.versioned != versioned_hidden
5141 && (bfd_link_dll (info)
5142 || fdh->elf.def_dynamic
5143 || fdh->elf.ref_dynamic)
5144 && (eh->elf.ref_regular
5145 || eh->elf.def_regular))
5146 {
5147 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5148 return FALSE;
5149 }
5150 }
5151
5152 return TRUE;
5153 }
5154
5155 /* Set up opd section info and abiversion for IBFD, and process list
5156 of dot-symbols we made in link_hash_newfunc. */
5157
5158 static bfd_boolean
5159 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5160 {
5161 struct ppc_link_hash_table *htab;
5162 struct ppc_link_hash_entry **p, *eh;
5163 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5164
5165 if (opd != NULL && opd->size != 0)
5166 {
5167 if (abiversion (ibfd) == 0)
5168 set_abiversion (ibfd, 1);
5169 else if (abiversion (ibfd) >= 2)
5170 {
5171 /* xgettext:c-format */
5172 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5173 " version %d\n"),
5174 ibfd, abiversion (ibfd));
5175 bfd_set_error (bfd_error_bad_value);
5176 return FALSE;
5177 }
5178
5179 if ((ibfd->flags & DYNAMIC) == 0
5180 && (opd->flags & SEC_RELOC) != 0
5181 && opd->reloc_count != 0
5182 && !bfd_is_abs_section (opd->output_section))
5183 {
5184 /* Garbage collection needs some extra help with .opd sections.
5185 We don't want to necessarily keep everything referenced by
5186 relocs in .opd, as that would keep all functions. Instead,
5187 if we reference an .opd symbol (a function descriptor), we
5188 want to keep the function code symbol's section. This is
5189 easy for global symbols, but for local syms we need to keep
5190 information about the associated function section. */
5191 bfd_size_type amt;
5192 asection **opd_sym_map;
5193
5194 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5195 opd_sym_map = bfd_zalloc (ibfd, amt);
5196 if (opd_sym_map == NULL)
5197 return FALSE;
5198 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5199 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5200 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5201 }
5202 }
5203
5204 if (!is_ppc64_elf (info->output_bfd))
5205 return TRUE;
5206 htab = ppc_hash_table (info);
5207 if (htab == NULL)
5208 return FALSE;
5209
5210 /* For input files without an explicit abiversion in e_flags
5211 we should have flagged any with symbol st_other bits set
5212 as ELFv1 and above flagged those with .opd as ELFv2.
5213 Set the output abiversion if not yet set, and for any input
5214 still ambiguous, take its abiversion from the output.
5215 Differences in ABI are reported later. */
5216 if (abiversion (info->output_bfd) == 0)
5217 set_abiversion (info->output_bfd, abiversion (ibfd));
5218 else if (abiversion (ibfd) == 0)
5219 set_abiversion (ibfd, abiversion (info->output_bfd));
5220
5221 p = &htab->dot_syms;
5222 while ((eh = *p) != NULL)
5223 {
5224 *p = NULL;
5225 if (&eh->elf == htab->elf.hgot)
5226 ;
5227 else if (htab->elf.hgot == NULL
5228 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5229 htab->elf.hgot = &eh->elf;
5230 else if (abiversion (ibfd) <= 1)
5231 {
5232 htab->need_func_desc_adj = 1;
5233 if (!add_symbol_adjust (eh, info))
5234 return FALSE;
5235 }
5236 p = &eh->u.next_dot_sym;
5237 }
5238 return TRUE;
5239 }
5240
5241 /* Undo hash table changes when an --as-needed input file is determined
5242 not to be needed. */
5243
5244 static bfd_boolean
5245 ppc64_elf_notice_as_needed (bfd *ibfd,
5246 struct bfd_link_info *info,
5247 enum notice_asneeded_action act)
5248 {
5249 if (act == notice_not_needed)
5250 {
5251 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5252
5253 if (htab == NULL)
5254 return FALSE;
5255
5256 htab->dot_syms = NULL;
5257 }
5258 return _bfd_elf_notice_as_needed (ibfd, info, act);
5259 }
5260
5261 /* If --just-symbols against a final linked binary, then assume we need
5262 toc adjusting stubs when calling functions defined there. */
5263
5264 static void
5265 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5266 {
5267 if ((sec->flags & SEC_CODE) != 0
5268 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5269 && is_ppc64_elf (sec->owner))
5270 {
5271 if (abiversion (sec->owner) >= 2
5272 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5273 sec->has_toc_reloc = 1;
5274 }
5275 _bfd_elf_link_just_syms (sec, info);
5276 }
5277
5278 static struct plt_entry **
5279 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5280 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5281 {
5282 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5283 struct plt_entry **local_plt;
5284 unsigned char *local_got_tls_masks;
5285
5286 if (local_got_ents == NULL)
5287 {
5288 bfd_size_type size = symtab_hdr->sh_info;
5289
5290 size *= (sizeof (*local_got_ents)
5291 + sizeof (*local_plt)
5292 + sizeof (*local_got_tls_masks));
5293 local_got_ents = bfd_zalloc (abfd, size);
5294 if (local_got_ents == NULL)
5295 return NULL;
5296 elf_local_got_ents (abfd) = local_got_ents;
5297 }
5298
5299 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5300 {
5301 struct got_entry *ent;
5302
5303 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5304 if (ent->addend == r_addend
5305 && ent->owner == abfd
5306 && ent->tls_type == tls_type)
5307 break;
5308 if (ent == NULL)
5309 {
5310 bfd_size_type amt = sizeof (*ent);
5311 ent = bfd_alloc (abfd, amt);
5312 if (ent == NULL)
5313 return FALSE;
5314 ent->next = local_got_ents[r_symndx];
5315 ent->addend = r_addend;
5316 ent->owner = abfd;
5317 ent->tls_type = tls_type;
5318 ent->is_indirect = FALSE;
5319 ent->got.refcount = 0;
5320 local_got_ents[r_symndx] = ent;
5321 }
5322 ent->got.refcount += 1;
5323 }
5324
5325 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5326 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5327 local_got_tls_masks[r_symndx] |= tls_type;
5328
5329 return local_plt + r_symndx;
5330 }
5331
5332 static bfd_boolean
5333 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5334 {
5335 struct plt_entry *ent;
5336
5337 for (ent = *plist; ent != NULL; ent = ent->next)
5338 if (ent->addend == addend)
5339 break;
5340 if (ent == NULL)
5341 {
5342 bfd_size_type amt = sizeof (*ent);
5343 ent = bfd_alloc (abfd, amt);
5344 if (ent == NULL)
5345 return FALSE;
5346 ent->next = *plist;
5347 ent->addend = addend;
5348 ent->plt.refcount = 0;
5349 *plist = ent;
5350 }
5351 ent->plt.refcount += 1;
5352 return TRUE;
5353 }
5354
5355 static bfd_boolean
5356 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5357 {
5358 return (r_type == R_PPC64_REL24
5359 || r_type == R_PPC64_REL14
5360 || r_type == R_PPC64_REL14_BRTAKEN
5361 || r_type == R_PPC64_REL14_BRNTAKEN
5362 || r_type == R_PPC64_ADDR24
5363 || r_type == R_PPC64_ADDR14
5364 || r_type == R_PPC64_ADDR14_BRTAKEN
5365 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5366 }
5367
5368 /* Look through the relocs for a section during the first phase, and
5369 calculate needed space in the global offset table, procedure
5370 linkage table, and dynamic reloc sections. */
5371
5372 static bfd_boolean
5373 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5374 asection *sec, const Elf_Internal_Rela *relocs)
5375 {
5376 struct ppc_link_hash_table *htab;
5377 Elf_Internal_Shdr *symtab_hdr;
5378 struct elf_link_hash_entry **sym_hashes;
5379 const Elf_Internal_Rela *rel;
5380 const Elf_Internal_Rela *rel_end;
5381 asection *sreloc;
5382 asection **opd_sym_map;
5383 struct elf_link_hash_entry *tga, *dottga;
5384
5385 if (bfd_link_relocatable (info))
5386 return TRUE;
5387
5388 /* Don't do anything special with non-loaded, non-alloced sections.
5389 In particular, any relocs in such sections should not affect GOT
5390 and PLT reference counting (ie. we don't allow them to create GOT
5391 or PLT entries), there's no possibility or desire to optimize TLS
5392 relocs, and there's not much point in propagating relocs to shared
5393 libs that the dynamic linker won't relocate. */
5394 if ((sec->flags & SEC_ALLOC) == 0)
5395 return TRUE;
5396
5397 BFD_ASSERT (is_ppc64_elf (abfd));
5398
5399 htab = ppc_hash_table (info);
5400 if (htab == NULL)
5401 return FALSE;
5402
5403 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5404 FALSE, FALSE, TRUE);
5405 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5406 FALSE, FALSE, TRUE);
5407 symtab_hdr = &elf_symtab_hdr (abfd);
5408 sym_hashes = elf_sym_hashes (abfd);
5409 sreloc = NULL;
5410 opd_sym_map = NULL;
5411 if (ppc64_elf_section_data (sec) != NULL
5412 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5413 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5414
5415 rel_end = relocs + sec->reloc_count;
5416 for (rel = relocs; rel < rel_end; rel++)
5417 {
5418 unsigned long r_symndx;
5419 struct elf_link_hash_entry *h;
5420 enum elf_ppc64_reloc_type r_type;
5421 int tls_type;
5422 struct _ppc64_elf_section_data *ppc64_sec;
5423 struct plt_entry **ifunc, **plt_list;
5424
5425 r_symndx = ELF64_R_SYM (rel->r_info);
5426 if (r_symndx < symtab_hdr->sh_info)
5427 h = NULL;
5428 else
5429 {
5430 struct ppc_link_hash_entry *eh;
5431
5432 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5433 h = elf_follow_link (h);
5434 eh = (struct ppc_link_hash_entry *) h;
5435
5436 /* PR15323, ref flags aren't set for references in the same
5437 object. */
5438 h->root.non_ir_ref_regular = 1;
5439 if (eh->is_func && eh->oh != NULL)
5440 eh->oh->elf.root.non_ir_ref_regular = 1;
5441
5442 if (h == htab->elf.hgot)
5443 sec->has_toc_reloc = 1;
5444 }
5445
5446 tls_type = 0;
5447 ifunc = NULL;
5448 if (h != NULL)
5449 {
5450 if (h->type == STT_GNU_IFUNC)
5451 {
5452 h->needs_plt = 1;
5453 ifunc = &h->plt.plist;
5454 }
5455 }
5456 else
5457 {
5458 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5459 abfd, r_symndx);
5460 if (isym == NULL)
5461 return FALSE;
5462
5463 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5464 {
5465 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5466 rel->r_addend, PLT_IFUNC);
5467 if (ifunc == NULL)
5468 return FALSE;
5469 }
5470 }
5471
5472 r_type = ELF64_R_TYPE (rel->r_info);
5473 switch (r_type)
5474 {
5475 case R_PPC64_TLSGD:
5476 case R_PPC64_TLSLD:
5477 /* These special tls relocs tie a call to __tls_get_addr with
5478 its parameter symbol. */
5479 break;
5480
5481 case R_PPC64_GOT_TLSLD16:
5482 case R_PPC64_GOT_TLSLD16_LO:
5483 case R_PPC64_GOT_TLSLD16_HI:
5484 case R_PPC64_GOT_TLSLD16_HA:
5485 tls_type = TLS_TLS | TLS_LD;
5486 goto dogottls;
5487
5488 case R_PPC64_GOT_TLSGD16:
5489 case R_PPC64_GOT_TLSGD16_LO:
5490 case R_PPC64_GOT_TLSGD16_HI:
5491 case R_PPC64_GOT_TLSGD16_HA:
5492 tls_type = TLS_TLS | TLS_GD;
5493 goto dogottls;
5494
5495 case R_PPC64_GOT_TPREL16_DS:
5496 case R_PPC64_GOT_TPREL16_LO_DS:
5497 case R_PPC64_GOT_TPREL16_HI:
5498 case R_PPC64_GOT_TPREL16_HA:
5499 if (bfd_link_pic (info))
5500 info->flags |= DF_STATIC_TLS;
5501 tls_type = TLS_TLS | TLS_TPREL;
5502 goto dogottls;
5503
5504 case R_PPC64_GOT_DTPREL16_DS:
5505 case R_PPC64_GOT_DTPREL16_LO_DS:
5506 case R_PPC64_GOT_DTPREL16_HI:
5507 case R_PPC64_GOT_DTPREL16_HA:
5508 tls_type = TLS_TLS | TLS_DTPREL;
5509 dogottls:
5510 sec->has_tls_reloc = 1;
5511 /* Fall through */
5512
5513 case R_PPC64_GOT16:
5514 case R_PPC64_GOT16_DS:
5515 case R_PPC64_GOT16_HA:
5516 case R_PPC64_GOT16_HI:
5517 case R_PPC64_GOT16_LO:
5518 case R_PPC64_GOT16_LO_DS:
5519 /* This symbol requires a global offset table entry. */
5520 sec->has_toc_reloc = 1;
5521 if (r_type == R_PPC64_GOT_TLSLD16
5522 || r_type == R_PPC64_GOT_TLSGD16
5523 || r_type == R_PPC64_GOT_TPREL16_DS
5524 || r_type == R_PPC64_GOT_DTPREL16_DS
5525 || r_type == R_PPC64_GOT16
5526 || r_type == R_PPC64_GOT16_DS)
5527 {
5528 htab->do_multi_toc = 1;
5529 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5530 }
5531
5532 if (ppc64_elf_tdata (abfd)->got == NULL
5533 && !create_got_section (abfd, info))
5534 return FALSE;
5535
5536 if (h != NULL)
5537 {
5538 struct ppc_link_hash_entry *eh;
5539 struct got_entry *ent;
5540
5541 eh = (struct ppc_link_hash_entry *) h;
5542 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5543 if (ent->addend == rel->r_addend
5544 && ent->owner == abfd
5545 && ent->tls_type == tls_type)
5546 break;
5547 if (ent == NULL)
5548 {
5549 bfd_size_type amt = sizeof (*ent);
5550 ent = bfd_alloc (abfd, amt);
5551 if (ent == NULL)
5552 return FALSE;
5553 ent->next = eh->elf.got.glist;
5554 ent->addend = rel->r_addend;
5555 ent->owner = abfd;
5556 ent->tls_type = tls_type;
5557 ent->is_indirect = FALSE;
5558 ent->got.refcount = 0;
5559 eh->elf.got.glist = ent;
5560 }
5561 ent->got.refcount += 1;
5562 eh->tls_mask |= tls_type;
5563 }
5564 else
5565 /* This is a global offset table entry for a local symbol. */
5566 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5567 rel->r_addend, tls_type))
5568 return FALSE;
5569
5570 /* We may also need a plt entry if the symbol turns out to be
5571 an ifunc. */
5572 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5573 {
5574 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5575 return FALSE;
5576 }
5577 break;
5578
5579 case R_PPC64_PLT16_HA:
5580 case R_PPC64_PLT16_HI:
5581 case R_PPC64_PLT16_LO:
5582 case R_PPC64_PLT32:
5583 case R_PPC64_PLT64:
5584 /* This symbol requires a procedure linkage table entry. */
5585 plt_list = ifunc;
5586 if (h != NULL)
5587 {
5588 h->needs_plt = 1;
5589 if (h->root.root.string[0] == '.'
5590 && h->root.root.string[1] != '\0')
5591 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5592 plt_list = &h->plt.plist;
5593 }
5594 if (plt_list == NULL)
5595 {
5596 /* It does not make sense to have a procedure linkage
5597 table entry for a non-ifunc local symbol. */
5598 info->callbacks->einfo
5599 /* xgettext:c-format */
5600 (_("%H: %s reloc against local symbol\n"),
5601 abfd, sec, rel->r_offset,
5602 ppc64_elf_howto_table[r_type]->name);
5603 bfd_set_error (bfd_error_bad_value);
5604 return FALSE;
5605 }
5606 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5607 return FALSE;
5608 break;
5609
5610 /* The following relocations don't need to propagate the
5611 relocation if linking a shared object since they are
5612 section relative. */
5613 case R_PPC64_SECTOFF:
5614 case R_PPC64_SECTOFF_LO:
5615 case R_PPC64_SECTOFF_HI:
5616 case R_PPC64_SECTOFF_HA:
5617 case R_PPC64_SECTOFF_DS:
5618 case R_PPC64_SECTOFF_LO_DS:
5619 case R_PPC64_DTPREL16:
5620 case R_PPC64_DTPREL16_LO:
5621 case R_PPC64_DTPREL16_HI:
5622 case R_PPC64_DTPREL16_HA:
5623 case R_PPC64_DTPREL16_DS:
5624 case R_PPC64_DTPREL16_LO_DS:
5625 case R_PPC64_DTPREL16_HIGH:
5626 case R_PPC64_DTPREL16_HIGHA:
5627 case R_PPC64_DTPREL16_HIGHER:
5628 case R_PPC64_DTPREL16_HIGHERA:
5629 case R_PPC64_DTPREL16_HIGHEST:
5630 case R_PPC64_DTPREL16_HIGHESTA:
5631 break;
5632
5633 /* Nor do these. */
5634 case R_PPC64_REL16:
5635 case R_PPC64_REL16_LO:
5636 case R_PPC64_REL16_HI:
5637 case R_PPC64_REL16_HA:
5638 case R_PPC64_REL16DX_HA:
5639 break;
5640
5641 /* Not supported as a dynamic relocation. */
5642 case R_PPC64_ADDR64_LOCAL:
5643 if (bfd_link_pic (info))
5644 {
5645 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5646 ppc_howto_init ();
5647 /* xgettext:c-format */
5648 info->callbacks->einfo (_("%H: %s reloc unsupported "
5649 "in shared libraries and PIEs.\n"),
5650 abfd, sec, rel->r_offset,
5651 ppc64_elf_howto_table[r_type]->name);
5652 bfd_set_error (bfd_error_bad_value);
5653 return FALSE;
5654 }
5655 break;
5656
5657 case R_PPC64_TOC16:
5658 case R_PPC64_TOC16_DS:
5659 htab->do_multi_toc = 1;
5660 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5661 /* Fall through. */
5662 case R_PPC64_TOC16_LO:
5663 case R_PPC64_TOC16_HI:
5664 case R_PPC64_TOC16_HA:
5665 case R_PPC64_TOC16_LO_DS:
5666 sec->has_toc_reloc = 1;
5667 break;
5668
5669 /* Marker reloc. */
5670 case R_PPC64_ENTRY:
5671 break;
5672
5673 /* This relocation describes the C++ object vtable hierarchy.
5674 Reconstruct it for later use during GC. */
5675 case R_PPC64_GNU_VTINHERIT:
5676 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5677 return FALSE;
5678 break;
5679
5680 /* This relocation describes which C++ vtable entries are actually
5681 used. Record for later use during GC. */
5682 case R_PPC64_GNU_VTENTRY:
5683 BFD_ASSERT (h != NULL);
5684 if (h != NULL
5685 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5686 return FALSE;
5687 break;
5688
5689 case R_PPC64_REL14:
5690 case R_PPC64_REL14_BRTAKEN:
5691 case R_PPC64_REL14_BRNTAKEN:
5692 {
5693 asection *dest = NULL;
5694
5695 /* Heuristic: If jumping outside our section, chances are
5696 we are going to need a stub. */
5697 if (h != NULL)
5698 {
5699 /* If the sym is weak it may be overridden later, so
5700 don't assume we know where a weak sym lives. */
5701 if (h->root.type == bfd_link_hash_defined)
5702 dest = h->root.u.def.section;
5703 }
5704 else
5705 {
5706 Elf_Internal_Sym *isym;
5707
5708 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5709 abfd, r_symndx);
5710 if (isym == NULL)
5711 return FALSE;
5712
5713 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5714 }
5715
5716 if (dest != sec)
5717 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5718 }
5719 /* Fall through. */
5720
5721 case R_PPC64_REL24:
5722 plt_list = ifunc;
5723 if (h != NULL)
5724 {
5725 h->needs_plt = 1;
5726 if (h->root.root.string[0] == '.'
5727 && h->root.root.string[1] != '\0')
5728 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5729
5730 if (h == tga || h == dottga)
5731 {
5732 sec->has_tls_reloc = 1;
5733 if (rel != relocs
5734 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5735 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5736 /* We have a new-style __tls_get_addr call with
5737 a marker reloc. */
5738 ;
5739 else
5740 /* Mark this section as having an old-style call. */
5741 sec->has_tls_get_addr_call = 1;
5742 }
5743 plt_list = &h->plt.plist;
5744 }
5745
5746 /* We may need a .plt entry if the function this reloc
5747 refers to is in a shared lib. */
5748 if (plt_list
5749 && !update_plt_info (abfd, plt_list, rel->r_addend))
5750 return FALSE;
5751 break;
5752
5753 case R_PPC64_ADDR14:
5754 case R_PPC64_ADDR14_BRNTAKEN:
5755 case R_PPC64_ADDR14_BRTAKEN:
5756 case R_PPC64_ADDR24:
5757 goto dodyn;
5758
5759 case R_PPC64_TPREL64:
5760 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5761 if (bfd_link_pic (info))
5762 info->flags |= DF_STATIC_TLS;
5763 goto dotlstoc;
5764
5765 case R_PPC64_DTPMOD64:
5766 if (rel + 1 < rel_end
5767 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5768 && rel[1].r_offset == rel->r_offset + 8)
5769 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5770 else
5771 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5772 goto dotlstoc;
5773
5774 case R_PPC64_DTPREL64:
5775 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5776 if (rel != relocs
5777 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5778 && rel[-1].r_offset == rel->r_offset - 8)
5779 /* This is the second reloc of a dtpmod, dtprel pair.
5780 Don't mark with TLS_DTPREL. */
5781 goto dodyn;
5782
5783 dotlstoc:
5784 sec->has_tls_reloc = 1;
5785 if (h != NULL)
5786 {
5787 struct ppc_link_hash_entry *eh;
5788 eh = (struct ppc_link_hash_entry *) h;
5789 eh->tls_mask |= tls_type;
5790 }
5791 else
5792 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5793 rel->r_addend, tls_type))
5794 return FALSE;
5795
5796 ppc64_sec = ppc64_elf_section_data (sec);
5797 if (ppc64_sec->sec_type != sec_toc)
5798 {
5799 bfd_size_type amt;
5800
5801 /* One extra to simplify get_tls_mask. */
5802 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5803 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5804 if (ppc64_sec->u.toc.symndx == NULL)
5805 return FALSE;
5806 amt = sec->size * sizeof (bfd_vma) / 8;
5807 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5808 if (ppc64_sec->u.toc.add == NULL)
5809 return FALSE;
5810 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5811 ppc64_sec->sec_type = sec_toc;
5812 }
5813 BFD_ASSERT (rel->r_offset % 8 == 0);
5814 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5815 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5816
5817 /* Mark the second slot of a GD or LD entry.
5818 -1 to indicate GD and -2 to indicate LD. */
5819 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5820 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5821 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5822 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5823 goto dodyn;
5824
5825 case R_PPC64_TPREL16:
5826 case R_PPC64_TPREL16_LO:
5827 case R_PPC64_TPREL16_HI:
5828 case R_PPC64_TPREL16_HA:
5829 case R_PPC64_TPREL16_DS:
5830 case R_PPC64_TPREL16_LO_DS:
5831 case R_PPC64_TPREL16_HIGH:
5832 case R_PPC64_TPREL16_HIGHA:
5833 case R_PPC64_TPREL16_HIGHER:
5834 case R_PPC64_TPREL16_HIGHERA:
5835 case R_PPC64_TPREL16_HIGHEST:
5836 case R_PPC64_TPREL16_HIGHESTA:
5837 if (bfd_link_pic (info))
5838 {
5839 info->flags |= DF_STATIC_TLS;
5840 goto dodyn;
5841 }
5842 break;
5843
5844 case R_PPC64_ADDR64:
5845 if (opd_sym_map != NULL
5846 && rel + 1 < rel_end
5847 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5848 {
5849 if (h != NULL)
5850 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5851 else
5852 {
5853 asection *s;
5854 Elf_Internal_Sym *isym;
5855
5856 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5857 abfd, r_symndx);
5858 if (isym == NULL)
5859 return FALSE;
5860
5861 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5862 if (s != NULL && s != sec)
5863 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5864 }
5865 }
5866 /* Fall through. */
5867
5868 case R_PPC64_ADDR16:
5869 case R_PPC64_ADDR16_DS:
5870 case R_PPC64_ADDR16_HA:
5871 case R_PPC64_ADDR16_HI:
5872 case R_PPC64_ADDR16_HIGH:
5873 case R_PPC64_ADDR16_HIGHA:
5874 case R_PPC64_ADDR16_HIGHER:
5875 case R_PPC64_ADDR16_HIGHERA:
5876 case R_PPC64_ADDR16_HIGHEST:
5877 case R_PPC64_ADDR16_HIGHESTA:
5878 case R_PPC64_ADDR16_LO:
5879 case R_PPC64_ADDR16_LO_DS:
5880 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5881 && rel->r_addend == 0)
5882 {
5883 /* We may need a .plt entry if this reloc refers to a
5884 function in a shared lib. */
5885 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5886 return FALSE;
5887 h->pointer_equality_needed = 1;
5888 }
5889 /* Fall through. */
5890
5891 case R_PPC64_REL30:
5892 case R_PPC64_REL32:
5893 case R_PPC64_REL64:
5894 case R_PPC64_ADDR32:
5895 case R_PPC64_UADDR16:
5896 case R_PPC64_UADDR32:
5897 case R_PPC64_UADDR64:
5898 case R_PPC64_TOC:
5899 if (h != NULL && !bfd_link_pic (info))
5900 /* We may need a copy reloc. */
5901 h->non_got_ref = 1;
5902
5903 /* Don't propagate .opd relocs. */
5904 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5905 break;
5906
5907 /* If we are creating a shared library, and this is a reloc
5908 against a global symbol, or a non PC relative reloc
5909 against a local symbol, then we need to copy the reloc
5910 into the shared library. However, if we are linking with
5911 -Bsymbolic, we do not need to copy a reloc against a
5912 global symbol which is defined in an object we are
5913 including in the link (i.e., DEF_REGULAR is set). At
5914 this point we have not seen all the input files, so it is
5915 possible that DEF_REGULAR is not set now but will be set
5916 later (it is never cleared). In case of a weak definition,
5917 DEF_REGULAR may be cleared later by a strong definition in
5918 a shared library. We account for that possibility below by
5919 storing information in the dyn_relocs field of the hash
5920 table entry. A similar situation occurs when creating
5921 shared libraries and symbol visibility changes render the
5922 symbol local.
5923
5924 If on the other hand, we are creating an executable, we
5925 may need to keep relocations for symbols satisfied by a
5926 dynamic library if we manage to avoid copy relocs for the
5927 symbol. */
5928 dodyn:
5929 if ((bfd_link_pic (info)
5930 && (must_be_dyn_reloc (info, r_type)
5931 || (h != NULL
5932 && (!SYMBOLIC_BIND (info, h)
5933 || h->root.type == bfd_link_hash_defweak
5934 || !h->def_regular))))
5935 || (ELIMINATE_COPY_RELOCS
5936 && !bfd_link_pic (info)
5937 && h != NULL
5938 && (h->root.type == bfd_link_hash_defweak
5939 || !h->def_regular))
5940 || (!bfd_link_pic (info)
5941 && ifunc != NULL))
5942 {
5943 /* We must copy these reloc types into the output file.
5944 Create a reloc section in dynobj and make room for
5945 this reloc. */
5946 if (sreloc == NULL)
5947 {
5948 sreloc = _bfd_elf_make_dynamic_reloc_section
5949 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5950
5951 if (sreloc == NULL)
5952 return FALSE;
5953 }
5954
5955 /* If this is a global symbol, we count the number of
5956 relocations we need for this symbol. */
5957 if (h != NULL)
5958 {
5959 struct elf_dyn_relocs *p;
5960 struct elf_dyn_relocs **head;
5961
5962 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5963 p = *head;
5964 if (p == NULL || p->sec != sec)
5965 {
5966 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5967 if (p == NULL)
5968 return FALSE;
5969 p->next = *head;
5970 *head = p;
5971 p->sec = sec;
5972 p->count = 0;
5973 p->pc_count = 0;
5974 }
5975 p->count += 1;
5976 if (!must_be_dyn_reloc (info, r_type))
5977 p->pc_count += 1;
5978 }
5979 else
5980 {
5981 /* Track dynamic relocs needed for local syms too.
5982 We really need local syms available to do this
5983 easily. Oh well. */
5984 struct ppc_dyn_relocs *p;
5985 struct ppc_dyn_relocs **head;
5986 bfd_boolean is_ifunc;
5987 asection *s;
5988 void *vpp;
5989 Elf_Internal_Sym *isym;
5990
5991 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5992 abfd, r_symndx);
5993 if (isym == NULL)
5994 return FALSE;
5995
5996 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5997 if (s == NULL)
5998 s = sec;
5999
6000 vpp = &elf_section_data (s)->local_dynrel;
6001 head = (struct ppc_dyn_relocs **) vpp;
6002 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6003 p = *head;
6004 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6005 p = p->next;
6006 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6007 {
6008 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6009 if (p == NULL)
6010 return FALSE;
6011 p->next = *head;
6012 *head = p;
6013 p->sec = sec;
6014 p->ifunc = is_ifunc;
6015 p->count = 0;
6016 }
6017 p->count += 1;
6018 }
6019 }
6020 break;
6021
6022 default:
6023 break;
6024 }
6025 }
6026
6027 return TRUE;
6028 }
6029
6030 /* Merge backend specific data from an object file to the output
6031 object file when linking. */
6032
6033 static bfd_boolean
6034 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6035 {
6036 bfd *obfd = info->output_bfd;
6037 unsigned long iflags, oflags;
6038
6039 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6040 return TRUE;
6041
6042 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6043 return TRUE;
6044
6045 if (!_bfd_generic_verify_endian_match (ibfd, info))
6046 return FALSE;
6047
6048 iflags = elf_elfheader (ibfd)->e_flags;
6049 oflags = elf_elfheader (obfd)->e_flags;
6050
6051 if (iflags & ~EF_PPC64_ABI)
6052 {
6053 _bfd_error_handler
6054 /* xgettext:c-format */
6055 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6056 bfd_set_error (bfd_error_bad_value);
6057 return FALSE;
6058 }
6059 else if (iflags != oflags && iflags != 0)
6060 {
6061 _bfd_error_handler
6062 /* xgettext:c-format */
6063 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6064 ibfd, iflags, oflags);
6065 bfd_set_error (bfd_error_bad_value);
6066 return FALSE;
6067 }
6068
6069 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6070
6071 /* Merge Tag_compatibility attributes and any common GNU ones. */
6072 _bfd_elf_merge_object_attributes (ibfd, info);
6073
6074 return TRUE;
6075 }
6076
6077 static bfd_boolean
6078 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6079 {
6080 /* Print normal ELF private data. */
6081 _bfd_elf_print_private_bfd_data (abfd, ptr);
6082
6083 if (elf_elfheader (abfd)->e_flags != 0)
6084 {
6085 FILE *file = ptr;
6086
6087 fprintf (file, _("private flags = 0x%lx:"),
6088 elf_elfheader (abfd)->e_flags);
6089
6090 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6091 fprintf (file, _(" [abiv%ld]"),
6092 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6093 fputc ('\n', file);
6094 }
6095
6096 return TRUE;
6097 }
6098
6099 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6100 of the code entry point, and its section, which must be in the same
6101 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6102
6103 static bfd_vma
6104 opd_entry_value (asection *opd_sec,
6105 bfd_vma offset,
6106 asection **code_sec,
6107 bfd_vma *code_off,
6108 bfd_boolean in_code_sec)
6109 {
6110 bfd *opd_bfd = opd_sec->owner;
6111 Elf_Internal_Rela *relocs;
6112 Elf_Internal_Rela *lo, *hi, *look;
6113 bfd_vma val;
6114
6115 /* No relocs implies we are linking a --just-symbols object, or looking
6116 at a final linked executable with addr2line or somesuch. */
6117 if (opd_sec->reloc_count == 0)
6118 {
6119 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6120
6121 if (contents == NULL)
6122 {
6123 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6124 return (bfd_vma) -1;
6125 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6126 }
6127
6128 /* PR 17512: file: 64b9dfbb. */
6129 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6130 return (bfd_vma) -1;
6131
6132 val = bfd_get_64 (opd_bfd, contents + offset);
6133 if (code_sec != NULL)
6134 {
6135 asection *sec, *likely = NULL;
6136
6137 if (in_code_sec)
6138 {
6139 sec = *code_sec;
6140 if (sec->vma <= val
6141 && val < sec->vma + sec->size)
6142 likely = sec;
6143 else
6144 val = -1;
6145 }
6146 else
6147 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6148 if (sec->vma <= val
6149 && (sec->flags & SEC_LOAD) != 0
6150 && (sec->flags & SEC_ALLOC) != 0)
6151 likely = sec;
6152 if (likely != NULL)
6153 {
6154 *code_sec = likely;
6155 if (code_off != NULL)
6156 *code_off = val - likely->vma;
6157 }
6158 }
6159 return val;
6160 }
6161
6162 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6163
6164 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6165 if (relocs == NULL)
6166 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6167 /* PR 17512: file: df8e1fd6. */
6168 if (relocs == NULL)
6169 return (bfd_vma) -1;
6170
6171 /* Go find the opd reloc at the sym address. */
6172 lo = relocs;
6173 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6174 val = (bfd_vma) -1;
6175 while (lo < hi)
6176 {
6177 look = lo + (hi - lo) / 2;
6178 if (look->r_offset < offset)
6179 lo = look + 1;
6180 else if (look->r_offset > offset)
6181 hi = look;
6182 else
6183 {
6184 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6185
6186 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6187 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6188 {
6189 unsigned long symndx = ELF64_R_SYM (look->r_info);
6190 asection *sec = NULL;
6191
6192 if (symndx >= symtab_hdr->sh_info
6193 && elf_sym_hashes (opd_bfd) != NULL)
6194 {
6195 struct elf_link_hash_entry **sym_hashes;
6196 struct elf_link_hash_entry *rh;
6197
6198 sym_hashes = elf_sym_hashes (opd_bfd);
6199 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6200 if (rh != NULL)
6201 {
6202 rh = elf_follow_link (rh);
6203 if (rh->root.type != bfd_link_hash_defined
6204 && rh->root.type != bfd_link_hash_defweak)
6205 break;
6206 if (rh->root.u.def.section->owner == opd_bfd)
6207 {
6208 val = rh->root.u.def.value;
6209 sec = rh->root.u.def.section;
6210 }
6211 }
6212 }
6213
6214 if (sec == NULL)
6215 {
6216 Elf_Internal_Sym *sym;
6217
6218 if (symndx < symtab_hdr->sh_info)
6219 {
6220 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6221 if (sym == NULL)
6222 {
6223 size_t symcnt = symtab_hdr->sh_info;
6224 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6225 symcnt, 0,
6226 NULL, NULL, NULL);
6227 if (sym == NULL)
6228 break;
6229 symtab_hdr->contents = (bfd_byte *) sym;
6230 }
6231 sym += symndx;
6232 }
6233 else
6234 {
6235 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6236 1, symndx,
6237 NULL, NULL, NULL);
6238 if (sym == NULL)
6239 break;
6240 }
6241 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6242 if (sec == NULL)
6243 break;
6244 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6245 val = sym->st_value;
6246 }
6247
6248 val += look->r_addend;
6249 if (code_off != NULL)
6250 *code_off = val;
6251 if (code_sec != NULL)
6252 {
6253 if (in_code_sec && *code_sec != sec)
6254 return -1;
6255 else
6256 *code_sec = sec;
6257 }
6258 if (sec->output_section != NULL)
6259 val += sec->output_section->vma + sec->output_offset;
6260 }
6261 break;
6262 }
6263 }
6264
6265 return val;
6266 }
6267
6268 /* If the ELF symbol SYM might be a function in SEC, return the
6269 function size and set *CODE_OFF to the function's entry point,
6270 otherwise return zero. */
6271
6272 static bfd_size_type
6273 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6274 bfd_vma *code_off)
6275 {
6276 bfd_size_type size;
6277
6278 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6279 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6280 return 0;
6281
6282 size = 0;
6283 if (!(sym->flags & BSF_SYNTHETIC))
6284 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6285
6286 if (strcmp (sym->section->name, ".opd") == 0)
6287 {
6288 struct _opd_sec_data *opd = get_opd_info (sym->section);
6289 bfd_vma symval = sym->value;
6290
6291 if (opd != NULL
6292 && opd->adjust != NULL
6293 && elf_section_data (sym->section)->relocs != NULL)
6294 {
6295 /* opd_entry_value will use cached relocs that have been
6296 adjusted, but with raw symbols. That means both local
6297 and global symbols need adjusting. */
6298 long adjust = opd->adjust[OPD_NDX (symval)];
6299 if (adjust == -1)
6300 return 0;
6301 symval += adjust;
6302 }
6303
6304 if (opd_entry_value (sym->section, symval,
6305 &sec, code_off, TRUE) == (bfd_vma) -1)
6306 return 0;
6307 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6308 symbol. This size has nothing to do with the code size of the
6309 function, which is what we're supposed to return, but the
6310 code size isn't available without looking up the dot-sym.
6311 However, doing that would be a waste of time particularly
6312 since elf_find_function will look at the dot-sym anyway.
6313 Now, elf_find_function will keep the largest size of any
6314 function sym found at the code address of interest, so return
6315 1 here to avoid it incorrectly caching a larger function size
6316 for a small function. This does mean we return the wrong
6317 size for a new-ABI function of size 24, but all that does is
6318 disable caching for such functions. */
6319 if (size == 24)
6320 size = 1;
6321 }
6322 else
6323 {
6324 if (sym->section != sec)
6325 return 0;
6326 *code_off = sym->value;
6327 }
6328 if (size == 0)
6329 size = 1;
6330 return size;
6331 }
6332
6333 /* Return true if symbol is a strong function defined in an ELFv2
6334 object with st_other localentry bits of zero, ie. its local entry
6335 point coincides with its global entry point. */
6336
6337 static bfd_boolean
6338 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6339 {
6340 return (h != NULL
6341 && h->type == STT_FUNC
6342 && h->root.type == bfd_link_hash_defined
6343 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6344 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6345 && is_ppc64_elf (h->root.u.def.section->owner)
6346 && abiversion (h->root.u.def.section->owner) >= 2);
6347 }
6348
6349 /* Return true if symbol is defined in a regular object file. */
6350
6351 static bfd_boolean
6352 is_static_defined (struct elf_link_hash_entry *h)
6353 {
6354 return ((h->root.type == bfd_link_hash_defined
6355 || h->root.type == bfd_link_hash_defweak)
6356 && h->root.u.def.section != NULL
6357 && h->root.u.def.section->output_section != NULL);
6358 }
6359
6360 /* If FDH is a function descriptor symbol, return the associated code
6361 entry symbol if it is defined. Return NULL otherwise. */
6362
6363 static struct ppc_link_hash_entry *
6364 defined_code_entry (struct ppc_link_hash_entry *fdh)
6365 {
6366 if (fdh->is_func_descriptor)
6367 {
6368 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6369 if (fh->elf.root.type == bfd_link_hash_defined
6370 || fh->elf.root.type == bfd_link_hash_defweak)
6371 return fh;
6372 }
6373 return NULL;
6374 }
6375
6376 /* If FH is a function code entry symbol, return the associated
6377 function descriptor symbol if it is defined. Return NULL otherwise. */
6378
6379 static struct ppc_link_hash_entry *
6380 defined_func_desc (struct ppc_link_hash_entry *fh)
6381 {
6382 if (fh->oh != NULL
6383 && fh->oh->is_func_descriptor)
6384 {
6385 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6386 if (fdh->elf.root.type == bfd_link_hash_defined
6387 || fdh->elf.root.type == bfd_link_hash_defweak)
6388 return fdh;
6389 }
6390 return NULL;
6391 }
6392
6393 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6394
6395 /* Garbage collect sections, after first dealing with dot-symbols. */
6396
6397 static bfd_boolean
6398 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6399 {
6400 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6401
6402 if (htab != NULL && htab->need_func_desc_adj)
6403 {
6404 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6405 htab->need_func_desc_adj = 0;
6406 }
6407 return bfd_elf_gc_sections (abfd, info);
6408 }
6409
6410 /* Mark all our entry sym sections, both opd and code section. */
6411
6412 static void
6413 ppc64_elf_gc_keep (struct bfd_link_info *info)
6414 {
6415 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6416 struct bfd_sym_chain *sym;
6417
6418 if (htab == NULL)
6419 return;
6420
6421 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6422 {
6423 struct ppc_link_hash_entry *eh, *fh;
6424 asection *sec;
6425
6426 eh = (struct ppc_link_hash_entry *)
6427 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6428 if (eh == NULL)
6429 continue;
6430 if (eh->elf.root.type != bfd_link_hash_defined
6431 && eh->elf.root.type != bfd_link_hash_defweak)
6432 continue;
6433
6434 fh = defined_code_entry (eh);
6435 if (fh != NULL)
6436 {
6437 sec = fh->elf.root.u.def.section;
6438 sec->flags |= SEC_KEEP;
6439 }
6440 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6441 && opd_entry_value (eh->elf.root.u.def.section,
6442 eh->elf.root.u.def.value,
6443 &sec, NULL, FALSE) != (bfd_vma) -1)
6444 sec->flags |= SEC_KEEP;
6445
6446 sec = eh->elf.root.u.def.section;
6447 sec->flags |= SEC_KEEP;
6448 }
6449 }
6450
6451 /* Mark sections containing dynamically referenced symbols. When
6452 building shared libraries, we must assume that any visible symbol is
6453 referenced. */
6454
6455 static bfd_boolean
6456 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6457 {
6458 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6459 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6460 struct ppc_link_hash_entry *fdh;
6461 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6462
6463 /* Dynamic linking info is on the func descriptor sym. */
6464 fdh = defined_func_desc (eh);
6465 if (fdh != NULL)
6466 eh = fdh;
6467
6468 if ((eh->elf.root.type == bfd_link_hash_defined
6469 || eh->elf.root.type == bfd_link_hash_defweak)
6470 && (eh->elf.ref_dynamic
6471 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6472 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6473 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6474 && (!bfd_link_executable (info)
6475 || info->gc_keep_exported
6476 || info->export_dynamic
6477 || (eh->elf.dynamic
6478 && d != NULL
6479 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6480 && (eh->elf.versioned >= versioned
6481 || !bfd_hide_sym_by_version (info->version_info,
6482 eh->elf.root.root.string)))))
6483 {
6484 asection *code_sec;
6485 struct ppc_link_hash_entry *fh;
6486
6487 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6488
6489 /* Function descriptor syms cause the associated
6490 function code sym section to be marked. */
6491 fh = defined_code_entry (eh);
6492 if (fh != NULL)
6493 {
6494 code_sec = fh->elf.root.u.def.section;
6495 code_sec->flags |= SEC_KEEP;
6496 }
6497 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6498 && opd_entry_value (eh->elf.root.u.def.section,
6499 eh->elf.root.u.def.value,
6500 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6501 code_sec->flags |= SEC_KEEP;
6502 }
6503
6504 return TRUE;
6505 }
6506
6507 /* Return the section that should be marked against GC for a given
6508 relocation. */
6509
6510 static asection *
6511 ppc64_elf_gc_mark_hook (asection *sec,
6512 struct bfd_link_info *info,
6513 Elf_Internal_Rela *rel,
6514 struct elf_link_hash_entry *h,
6515 Elf_Internal_Sym *sym)
6516 {
6517 asection *rsec;
6518
6519 /* Syms return NULL if we're marking .opd, so we avoid marking all
6520 function sections, as all functions are referenced in .opd. */
6521 rsec = NULL;
6522 if (get_opd_info (sec) != NULL)
6523 return rsec;
6524
6525 if (h != NULL)
6526 {
6527 enum elf_ppc64_reloc_type r_type;
6528 struct ppc_link_hash_entry *eh, *fh, *fdh;
6529
6530 r_type = ELF64_R_TYPE (rel->r_info);
6531 switch (r_type)
6532 {
6533 case R_PPC64_GNU_VTINHERIT:
6534 case R_PPC64_GNU_VTENTRY:
6535 break;
6536
6537 default:
6538 switch (h->root.type)
6539 {
6540 case bfd_link_hash_defined:
6541 case bfd_link_hash_defweak:
6542 eh = (struct ppc_link_hash_entry *) h;
6543 fdh = defined_func_desc (eh);
6544 if (fdh != NULL)
6545 {
6546 /* -mcall-aixdesc code references the dot-symbol on
6547 a call reloc. Mark the function descriptor too
6548 against garbage collection. */
6549 fdh->elf.mark = 1;
6550 if (fdh->elf.u.weakdef != NULL)
6551 fdh->elf.u.weakdef->mark = 1;
6552 eh = fdh;
6553 }
6554
6555 /* Function descriptor syms cause the associated
6556 function code sym section to be marked. */
6557 fh = defined_code_entry (eh);
6558 if (fh != NULL)
6559 {
6560 /* They also mark their opd section. */
6561 eh->elf.root.u.def.section->gc_mark = 1;
6562
6563 rsec = fh->elf.root.u.def.section;
6564 }
6565 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6566 && opd_entry_value (eh->elf.root.u.def.section,
6567 eh->elf.root.u.def.value,
6568 &rsec, NULL, FALSE) != (bfd_vma) -1)
6569 eh->elf.root.u.def.section->gc_mark = 1;
6570 else
6571 rsec = h->root.u.def.section;
6572 break;
6573
6574 case bfd_link_hash_common:
6575 rsec = h->root.u.c.p->section;
6576 break;
6577
6578 default:
6579 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6580 }
6581 }
6582 }
6583 else
6584 {
6585 struct _opd_sec_data *opd;
6586
6587 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6588 opd = get_opd_info (rsec);
6589 if (opd != NULL && opd->func_sec != NULL)
6590 {
6591 rsec->gc_mark = 1;
6592
6593 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6594 }
6595 }
6596
6597 return rsec;
6598 }
6599
6600 /* Update the .got, .plt. and dynamic reloc reference counts for the
6601 section being removed. */
6602
6603 static bfd_boolean
6604 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6605 asection *sec, const Elf_Internal_Rela *relocs)
6606 {
6607 struct ppc_link_hash_table *htab;
6608 Elf_Internal_Shdr *symtab_hdr;
6609 struct elf_link_hash_entry **sym_hashes;
6610 struct got_entry **local_got_ents;
6611 const Elf_Internal_Rela *rel, *relend;
6612
6613 if (bfd_link_relocatable (info))
6614 return TRUE;
6615
6616 if ((sec->flags & SEC_ALLOC) == 0)
6617 return TRUE;
6618
6619 elf_section_data (sec)->local_dynrel = NULL;
6620
6621 htab = ppc_hash_table (info);
6622 if (htab == NULL)
6623 return FALSE;
6624
6625 symtab_hdr = &elf_symtab_hdr (abfd);
6626 sym_hashes = elf_sym_hashes (abfd);
6627 local_got_ents = elf_local_got_ents (abfd);
6628
6629 relend = relocs + sec->reloc_count;
6630 for (rel = relocs; rel < relend; rel++)
6631 {
6632 unsigned long r_symndx;
6633 enum elf_ppc64_reloc_type r_type;
6634 struct elf_link_hash_entry *h = NULL;
6635 struct plt_entry **plt_list = NULL;
6636 unsigned char tls_type = 0;
6637
6638 r_symndx = ELF64_R_SYM (rel->r_info);
6639 r_type = ELF64_R_TYPE (rel->r_info);
6640 if (r_symndx >= symtab_hdr->sh_info)
6641 {
6642 struct ppc_link_hash_entry *eh;
6643 struct elf_dyn_relocs **pp;
6644 struct elf_dyn_relocs *p;
6645
6646 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6647 h = elf_follow_link (h);
6648 eh = (struct ppc_link_hash_entry *) h;
6649
6650 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6651 if (p->sec == sec)
6652 {
6653 /* Everything must go for SEC. */
6654 *pp = p->next;
6655 break;
6656 }
6657 }
6658
6659 switch (r_type)
6660 {
6661 case R_PPC64_GOT_TLSLD16:
6662 case R_PPC64_GOT_TLSLD16_LO:
6663 case R_PPC64_GOT_TLSLD16_HI:
6664 case R_PPC64_GOT_TLSLD16_HA:
6665 tls_type = TLS_TLS | TLS_LD;
6666 goto dogot;
6667
6668 case R_PPC64_GOT_TLSGD16:
6669 case R_PPC64_GOT_TLSGD16_LO:
6670 case R_PPC64_GOT_TLSGD16_HI:
6671 case R_PPC64_GOT_TLSGD16_HA:
6672 tls_type = TLS_TLS | TLS_GD;
6673 goto dogot;
6674
6675 case R_PPC64_GOT_TPREL16_DS:
6676 case R_PPC64_GOT_TPREL16_LO_DS:
6677 case R_PPC64_GOT_TPREL16_HI:
6678 case R_PPC64_GOT_TPREL16_HA:
6679 tls_type = TLS_TLS | TLS_TPREL;
6680 goto dogot;
6681
6682 case R_PPC64_GOT_DTPREL16_DS:
6683 case R_PPC64_GOT_DTPREL16_LO_DS:
6684 case R_PPC64_GOT_DTPREL16_HI:
6685 case R_PPC64_GOT_DTPREL16_HA:
6686 tls_type = TLS_TLS | TLS_DTPREL;
6687 goto dogot;
6688
6689 case R_PPC64_GOT16:
6690 case R_PPC64_GOT16_DS:
6691 case R_PPC64_GOT16_HA:
6692 case R_PPC64_GOT16_HI:
6693 case R_PPC64_GOT16_LO:
6694 case R_PPC64_GOT16_LO_DS:
6695 dogot:
6696 {
6697 struct got_entry *ent;
6698
6699 if (h != NULL)
6700 ent = h->got.glist;
6701 else
6702 ent = local_got_ents[r_symndx];
6703
6704 for (; ent != NULL; ent = ent->next)
6705 if (ent->addend == rel->r_addend
6706 && ent->owner == abfd
6707 && ent->tls_type == tls_type)
6708 break;
6709 if (ent == NULL)
6710 abort ();
6711 if (ent->got.refcount > 0)
6712 ent->got.refcount -= 1;
6713 }
6714 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6715 plt_list = &h->plt.plist;
6716 break;
6717
6718 case R_PPC64_PLT16_HA:
6719 case R_PPC64_PLT16_HI:
6720 case R_PPC64_PLT16_LO:
6721 case R_PPC64_PLT32:
6722 case R_PPC64_PLT64:
6723 case R_PPC64_REL14:
6724 case R_PPC64_REL14_BRNTAKEN:
6725 case R_PPC64_REL14_BRTAKEN:
6726 case R_PPC64_REL24:
6727 if (h != NULL)
6728 plt_list = &h->plt.plist;
6729 else if (local_got_ents != NULL)
6730 {
6731 struct plt_entry **local_plt = (struct plt_entry **)
6732 (local_got_ents + symtab_hdr->sh_info);
6733 unsigned char *local_got_tls_masks = (unsigned char *)
6734 (local_plt + symtab_hdr->sh_info);
6735 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6736 plt_list = local_plt + r_symndx;
6737 }
6738 break;
6739
6740 case R_PPC64_ADDR64:
6741 case R_PPC64_ADDR16:
6742 case R_PPC64_ADDR16_DS:
6743 case R_PPC64_ADDR16_HA:
6744 case R_PPC64_ADDR16_HI:
6745 case R_PPC64_ADDR16_HIGH:
6746 case R_PPC64_ADDR16_HIGHA:
6747 case R_PPC64_ADDR16_HIGHER:
6748 case R_PPC64_ADDR16_HIGHERA:
6749 case R_PPC64_ADDR16_HIGHEST:
6750 case R_PPC64_ADDR16_HIGHESTA:
6751 case R_PPC64_ADDR16_LO:
6752 case R_PPC64_ADDR16_LO_DS:
6753 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6754 && rel->r_addend == 0)
6755 plt_list = &h->plt.plist;
6756 break;
6757
6758 default:
6759 break;
6760 }
6761 if (plt_list != NULL)
6762 {
6763 struct plt_entry *ent;
6764
6765 for (ent = *plt_list; ent != NULL; ent = ent->next)
6766 if (ent->addend == rel->r_addend)
6767 break;
6768 if (ent != NULL && ent->plt.refcount > 0)
6769 ent->plt.refcount -= 1;
6770 }
6771 }
6772 return TRUE;
6773 }
6774
6775 /* The maximum size of .sfpr. */
6776 #define SFPR_MAX (218*4)
6777
6778 struct sfpr_def_parms
6779 {
6780 const char name[12];
6781 unsigned char lo, hi;
6782 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6783 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6784 };
6785
6786 /* Auto-generate _save*, _rest* functions in .sfpr.
6787 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6788 instead. */
6789
6790 static bfd_boolean
6791 sfpr_define (struct bfd_link_info *info,
6792 const struct sfpr_def_parms *parm,
6793 asection *stub_sec)
6794 {
6795 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6796 unsigned int i;
6797 size_t len = strlen (parm->name);
6798 bfd_boolean writing = FALSE;
6799 char sym[16];
6800
6801 if (htab == NULL)
6802 return FALSE;
6803
6804 memcpy (sym, parm->name, len);
6805 sym[len + 2] = 0;
6806
6807 for (i = parm->lo; i <= parm->hi; i++)
6808 {
6809 struct ppc_link_hash_entry *h;
6810
6811 sym[len + 0] = i / 10 + '0';
6812 sym[len + 1] = i % 10 + '0';
6813 h = (struct ppc_link_hash_entry *)
6814 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6815 if (stub_sec != NULL)
6816 {
6817 if (h != NULL
6818 && h->elf.root.type == bfd_link_hash_defined
6819 && h->elf.root.u.def.section == htab->sfpr)
6820 {
6821 struct elf_link_hash_entry *s;
6822 char buf[32];
6823 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6824 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6825 if (s == NULL)
6826 return FALSE;
6827 if (s->root.type == bfd_link_hash_new
6828 || (s->root.type = bfd_link_hash_defined
6829 && s->root.u.def.section == stub_sec))
6830 {
6831 s->root.type = bfd_link_hash_defined;
6832 s->root.u.def.section = stub_sec;
6833 s->root.u.def.value = (stub_sec->size
6834 + h->elf.root.u.def.value);
6835 s->ref_regular = 1;
6836 s->def_regular = 1;
6837 s->ref_regular_nonweak = 1;
6838 s->forced_local = 1;
6839 s->non_elf = 0;
6840 s->root.linker_def = 1;
6841 }
6842 }
6843 continue;
6844 }
6845 if (h != NULL)
6846 {
6847 h->save_res = 1;
6848 if (!h->elf.def_regular)
6849 {
6850 h->elf.root.type = bfd_link_hash_defined;
6851 h->elf.root.u.def.section = htab->sfpr;
6852 h->elf.root.u.def.value = htab->sfpr->size;
6853 h->elf.type = STT_FUNC;
6854 h->elf.def_regular = 1;
6855 h->elf.non_elf = 0;
6856 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6857 writing = TRUE;
6858 if (htab->sfpr->contents == NULL)
6859 {
6860 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6861 if (htab->sfpr->contents == NULL)
6862 return FALSE;
6863 }
6864 }
6865 }
6866 if (writing)
6867 {
6868 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6869 if (i != parm->hi)
6870 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6871 else
6872 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6873 htab->sfpr->size = p - htab->sfpr->contents;
6874 }
6875 }
6876
6877 return TRUE;
6878 }
6879
6880 static bfd_byte *
6881 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6882 {
6883 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6884 return p + 4;
6885 }
6886
6887 static bfd_byte *
6888 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6889 {
6890 p = savegpr0 (abfd, p, r);
6891 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6892 p = p + 4;
6893 bfd_put_32 (abfd, BLR, p);
6894 return p + 4;
6895 }
6896
6897 static bfd_byte *
6898 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6899 {
6900 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6901 return p + 4;
6902 }
6903
6904 static bfd_byte *
6905 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6906 {
6907 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6908 p = p + 4;
6909 p = restgpr0 (abfd, p, r);
6910 bfd_put_32 (abfd, MTLR_R0, p);
6911 p = p + 4;
6912 if (r == 29)
6913 {
6914 p = restgpr0 (abfd, p, 30);
6915 p = restgpr0 (abfd, p, 31);
6916 }
6917 bfd_put_32 (abfd, BLR, p);
6918 return p + 4;
6919 }
6920
6921 static bfd_byte *
6922 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6923 {
6924 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6925 return p + 4;
6926 }
6927
6928 static bfd_byte *
6929 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6930 {
6931 p = savegpr1 (abfd, p, r);
6932 bfd_put_32 (abfd, BLR, p);
6933 return p + 4;
6934 }
6935
6936 static bfd_byte *
6937 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6938 {
6939 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6940 return p + 4;
6941 }
6942
6943 static bfd_byte *
6944 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6945 {
6946 p = restgpr1 (abfd, p, r);
6947 bfd_put_32 (abfd, BLR, p);
6948 return p + 4;
6949 }
6950
6951 static bfd_byte *
6952 savefpr (bfd *abfd, bfd_byte *p, int r)
6953 {
6954 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6955 return p + 4;
6956 }
6957
6958 static bfd_byte *
6959 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6960 {
6961 p = savefpr (abfd, p, r);
6962 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6963 p = p + 4;
6964 bfd_put_32 (abfd, BLR, p);
6965 return p + 4;
6966 }
6967
6968 static bfd_byte *
6969 restfpr (bfd *abfd, bfd_byte *p, int r)
6970 {
6971 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6972 return p + 4;
6973 }
6974
6975 static bfd_byte *
6976 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6977 {
6978 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6979 p = p + 4;
6980 p = restfpr (abfd, p, r);
6981 bfd_put_32 (abfd, MTLR_R0, p);
6982 p = p + 4;
6983 if (r == 29)
6984 {
6985 p = restfpr (abfd, p, 30);
6986 p = restfpr (abfd, p, 31);
6987 }
6988 bfd_put_32 (abfd, BLR, p);
6989 return p + 4;
6990 }
6991
6992 static bfd_byte *
6993 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6994 {
6995 p = savefpr (abfd, p, r);
6996 bfd_put_32 (abfd, BLR, p);
6997 return p + 4;
6998 }
6999
7000 static bfd_byte *
7001 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
7002 {
7003 p = restfpr (abfd, p, r);
7004 bfd_put_32 (abfd, BLR, p);
7005 return p + 4;
7006 }
7007
7008 static bfd_byte *
7009 savevr (bfd *abfd, bfd_byte *p, int r)
7010 {
7011 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7012 p = p + 4;
7013 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
7014 return p + 4;
7015 }
7016
7017 static bfd_byte *
7018 savevr_tail (bfd *abfd, bfd_byte *p, int r)
7019 {
7020 p = savevr (abfd, p, r);
7021 bfd_put_32 (abfd, BLR, p);
7022 return p + 4;
7023 }
7024
7025 static bfd_byte *
7026 restvr (bfd *abfd, bfd_byte *p, int r)
7027 {
7028 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7029 p = p + 4;
7030 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7031 return p + 4;
7032 }
7033
7034 static bfd_byte *
7035 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7036 {
7037 p = restvr (abfd, p, r);
7038 bfd_put_32 (abfd, BLR, p);
7039 return p + 4;
7040 }
7041
7042 /* Called via elf_link_hash_traverse to transfer dynamic linking
7043 information on function code symbol entries to their corresponding
7044 function descriptor symbol entries. */
7045
7046 static bfd_boolean
7047 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7048 {
7049 struct bfd_link_info *info;
7050 struct ppc_link_hash_table *htab;
7051 struct ppc_link_hash_entry *fh;
7052 struct ppc_link_hash_entry *fdh;
7053 bfd_boolean force_local;
7054
7055 fh = (struct ppc_link_hash_entry *) h;
7056 if (fh->elf.root.type == bfd_link_hash_indirect)
7057 return TRUE;
7058
7059 if (!fh->is_func)
7060 return TRUE;
7061
7062 if (fh->elf.root.root.string[0] != '.'
7063 || fh->elf.root.root.string[1] == '\0')
7064 return TRUE;
7065
7066 info = inf;
7067 htab = ppc_hash_table (info);
7068 if (htab == NULL)
7069 return FALSE;
7070
7071 /* Find the corresponding function descriptor symbol. */
7072 fdh = lookup_fdh (fh, htab);
7073
7074 /* Resolve undefined references to dot-symbols as the value
7075 in the function descriptor, if we have one in a regular object.
7076 This is to satisfy cases like ".quad .foo". Calls to functions
7077 in dynamic objects are handled elsewhere. */
7078 if ((fh->elf.root.type == bfd_link_hash_undefined
7079 || fh->elf.root.type == bfd_link_hash_undefweak)
7080 && (fdh->elf.root.type == bfd_link_hash_defined
7081 || fdh->elf.root.type == bfd_link_hash_defweak)
7082 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7083 && opd_entry_value (fdh->elf.root.u.def.section,
7084 fdh->elf.root.u.def.value,
7085 &fh->elf.root.u.def.section,
7086 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7087 {
7088 fh->elf.root.type = fdh->elf.root.type;
7089 fh->elf.forced_local = 1;
7090 fh->elf.def_regular = fdh->elf.def_regular;
7091 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7092 }
7093
7094 if (!fh->elf.dynamic)
7095 {
7096 struct plt_entry *ent;
7097
7098 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7099 if (ent->plt.refcount > 0)
7100 break;
7101 if (ent == NULL)
7102 return TRUE;
7103 }
7104
7105 /* Create a descriptor as undefined if necessary. */
7106 if (fdh == NULL
7107 && !bfd_link_executable (info)
7108 && (fh->elf.root.type == bfd_link_hash_undefined
7109 || fh->elf.root.type == bfd_link_hash_undefweak))
7110 {
7111 fdh = make_fdh (info, fh);
7112 if (fdh == NULL)
7113 return FALSE;
7114 }
7115
7116 /* We can't support overriding of symbols on a fake descriptor. */
7117 if (fdh != NULL
7118 && fdh->fake
7119 && (fh->elf.root.type == bfd_link_hash_defined
7120 || fh->elf.root.type == bfd_link_hash_defweak))
7121 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7122
7123 /* Transfer dynamic linking information to the function descriptor. */
7124 if (fdh != NULL)
7125 {
7126 fdh->elf.ref_regular |= fh->elf.ref_regular;
7127 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7128 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7129 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7130 fdh->elf.dynamic |= fh->elf.dynamic;
7131 fdh->elf.needs_plt |= (fh->elf.needs_plt
7132 || fh->elf.type == STT_FUNC
7133 || fh->elf.type == STT_GNU_IFUNC);
7134 move_plt_plist (fh, fdh);
7135
7136 if (!fdh->elf.forced_local
7137 && fh->elf.dynindx != -1)
7138 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7139 return FALSE;
7140 }
7141
7142 /* Now that the info is on the function descriptor, clear the
7143 function code sym info. Any function code syms for which we
7144 don't have a definition in a regular file, we force local.
7145 This prevents a shared library from exporting syms that have
7146 been imported from another library. Function code syms that
7147 are really in the library we must leave global to prevent the
7148 linker dragging in a definition from a static library. */
7149 force_local = (!fh->elf.def_regular
7150 || fdh == NULL
7151 || !fdh->elf.def_regular
7152 || fdh->elf.forced_local);
7153 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7154
7155 return TRUE;
7156 }
7157
7158 static const struct sfpr_def_parms save_res_funcs[] =
7159 {
7160 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7161 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7162 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7163 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7164 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7165 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7166 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7167 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7168 { "._savef", 14, 31, savefpr, savefpr1_tail },
7169 { "._restf", 14, 31, restfpr, restfpr1_tail },
7170 { "_savevr_", 20, 31, savevr, savevr_tail },
7171 { "_restvr_", 20, 31, restvr, restvr_tail }
7172 };
7173
7174 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7175 this hook to a) provide some gcc support functions, and b) transfer
7176 dynamic linking information gathered so far on function code symbol
7177 entries, to their corresponding function descriptor symbol entries. */
7178
7179 static bfd_boolean
7180 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7181 struct bfd_link_info *info)
7182 {
7183 struct ppc_link_hash_table *htab;
7184
7185 htab = ppc_hash_table (info);
7186 if (htab == NULL)
7187 return FALSE;
7188
7189 /* Provide any missing _save* and _rest* functions. */
7190 if (htab->sfpr != NULL)
7191 {
7192 unsigned int i;
7193
7194 htab->sfpr->size = 0;
7195 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7196 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7197 return FALSE;
7198 if (htab->sfpr->size == 0)
7199 htab->sfpr->flags |= SEC_EXCLUDE;
7200 }
7201
7202 if (bfd_link_relocatable (info))
7203 return TRUE;
7204
7205 if (htab->elf.hgot != NULL)
7206 {
7207 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7208 /* Make .TOC. defined so as to prevent it being made dynamic.
7209 The wrong value here is fixed later in ppc64_elf_set_toc. */
7210 if (!htab->elf.hgot->def_regular
7211 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7212 {
7213 htab->elf.hgot->root.type = bfd_link_hash_defined;
7214 htab->elf.hgot->root.u.def.value = 0;
7215 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7216 htab->elf.hgot->def_regular = 1;
7217 htab->elf.hgot->root.linker_def = 1;
7218 }
7219 htab->elf.hgot->type = STT_OBJECT;
7220 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7221 | STV_HIDDEN);
7222 }
7223
7224 if (htab->need_func_desc_adj)
7225 {
7226 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7227 htab->need_func_desc_adj = 0;
7228 }
7229
7230 return TRUE;
7231 }
7232
7233 /* Return true if we have dynamic relocs against H that apply to
7234 read-only sections. */
7235
7236 static bfd_boolean
7237 readonly_dynrelocs (struct elf_link_hash_entry *h)
7238 {
7239 struct ppc_link_hash_entry *eh;
7240 struct elf_dyn_relocs *p;
7241
7242 eh = (struct ppc_link_hash_entry *) h;
7243 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7244 {
7245 asection *s = p->sec->output_section;
7246
7247 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7248 return TRUE;
7249 }
7250 return FALSE;
7251 }
7252
7253 /* Return true if we have dynamic relocs against H or any of its weak
7254 aliases, that apply to read-only sections. */
7255
7256 static bfd_boolean
7257 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7258 {
7259 struct ppc_link_hash_entry *eh;
7260
7261 eh = (struct ppc_link_hash_entry *) h;
7262 do
7263 {
7264 if (readonly_dynrelocs (&eh->elf))
7265 return TRUE;
7266 eh = eh->weakref;
7267 } while (eh != NULL && &eh->elf != h);
7268
7269 return FALSE;
7270 }
7271
7272 /* Return whether EH has pc-relative dynamic relocs. */
7273
7274 static bfd_boolean
7275 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7276 {
7277 struct elf_dyn_relocs *p;
7278
7279 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7280 if (p->pc_count != 0)
7281 return TRUE;
7282 return FALSE;
7283 }
7284
7285 /* Return true if a global entry stub will be created for H. Valid
7286 for ELFv2 before plt entries have been allocated. */
7287
7288 static bfd_boolean
7289 global_entry_stub (struct elf_link_hash_entry *h)
7290 {
7291 struct plt_entry *pent;
7292
7293 if (!h->pointer_equality_needed
7294 || h->def_regular)
7295 return FALSE;
7296
7297 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7298 if (pent->plt.refcount > 0
7299 && pent->addend == 0)
7300 return TRUE;
7301
7302 return FALSE;
7303 }
7304
7305 /* Adjust a symbol defined by a dynamic object and referenced by a
7306 regular object. The current definition is in some section of the
7307 dynamic object, but we're not including those sections. We have to
7308 change the definition to something the rest of the link can
7309 understand. */
7310
7311 static bfd_boolean
7312 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7313 struct elf_link_hash_entry *h)
7314 {
7315 struct ppc_link_hash_table *htab;
7316 asection *s, *srel;
7317
7318 htab = ppc_hash_table (info);
7319 if (htab == NULL)
7320 return FALSE;
7321
7322 /* Deal with function syms. */
7323 if (h->type == STT_FUNC
7324 || h->type == STT_GNU_IFUNC
7325 || h->needs_plt)
7326 {
7327 /* Clear procedure linkage table information for any symbol that
7328 won't need a .plt entry. */
7329 struct plt_entry *ent;
7330 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7331 if (ent->plt.refcount > 0)
7332 break;
7333 if (ent == NULL
7334 || (h->type != STT_GNU_IFUNC
7335 && (SYMBOL_CALLS_LOCAL (info, h)
7336 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7337 || ((struct ppc_link_hash_entry *) h)->save_res)
7338 {
7339 h->plt.plist = NULL;
7340 h->needs_plt = 0;
7341 h->pointer_equality_needed = 0;
7342 }
7343 else if (abiversion (info->output_bfd) >= 2)
7344 {
7345 /* Taking a function's address in a read/write section
7346 doesn't require us to define the function symbol in the
7347 executable on a global entry stub. A dynamic reloc can
7348 be used instead. The reason we prefer a few more dynamic
7349 relocs is that calling via a global entry stub costs a
7350 few more instructions, and pointer_equality_needed causes
7351 extra work in ld.so when resolving these symbols. */
7352 if (global_entry_stub (h)
7353 && !alias_readonly_dynrelocs (h))
7354 {
7355 h->pointer_equality_needed = 0;
7356 /* After adjust_dynamic_symbol, non_got_ref set in
7357 the non-pic case means that dyn_relocs for this
7358 symbol should be discarded. */
7359 h->non_got_ref = 0;
7360 }
7361
7362 /* If making a plt entry, then we don't need copy relocs. */
7363 return TRUE;
7364 }
7365 }
7366 else
7367 h->plt.plist = NULL;
7368
7369 /* If this is a weak symbol, and there is a real definition, the
7370 processor independent code will have arranged for us to see the
7371 real definition first, and we can just use the same value. */
7372 if (h->u.weakdef != NULL)
7373 {
7374 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7375 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7376 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7377 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7378 if (ELIMINATE_COPY_RELOCS)
7379 h->non_got_ref = h->u.weakdef->non_got_ref;
7380 return TRUE;
7381 }
7382
7383 /* If we are creating a shared library, we must presume that the
7384 only references to the symbol are via the global offset table.
7385 For such cases we need not do anything here; the relocations will
7386 be handled correctly by relocate_section. */
7387 if (bfd_link_pic (info))
7388 return TRUE;
7389
7390 /* If there are no references to this symbol that do not use the
7391 GOT, we don't need to generate a copy reloc. */
7392 if (!h->non_got_ref)
7393 return TRUE;
7394
7395 /* Don't generate a copy reloc for symbols defined in the executable. */
7396 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7397
7398 /* If -z nocopyreloc was given, don't generate them either. */
7399 || info->nocopyreloc
7400
7401 /* If we didn't find any dynamic relocs in read-only sections, then
7402 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7403 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7404
7405 /* Protected variables do not work with .dynbss. The copy in
7406 .dynbss won't be used by the shared library with the protected
7407 definition for the variable. Text relocations are preferable
7408 to an incorrect program. */
7409 || h->protected_def)
7410 {
7411 h->non_got_ref = 0;
7412 return TRUE;
7413 }
7414
7415 if (h->plt.plist != NULL)
7416 {
7417 /* We should never get here, but unfortunately there are versions
7418 of gcc out there that improperly (for this ABI) put initialized
7419 function pointers, vtable refs and suchlike in read-only
7420 sections. Allow them to proceed, but warn that this might
7421 break at runtime. */
7422 info->callbacks->einfo
7423 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7424 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7425 h->root.root.string);
7426 }
7427
7428 /* This is a reference to a symbol defined by a dynamic object which
7429 is not a function. */
7430
7431 /* We must allocate the symbol in our .dynbss section, which will
7432 become part of the .bss section of the executable. There will be
7433 an entry for this symbol in the .dynsym section. The dynamic
7434 object will contain position independent code, so all references
7435 from the dynamic object to this symbol will go through the global
7436 offset table. The dynamic linker will use the .dynsym entry to
7437 determine the address it must put in the global offset table, so
7438 both the dynamic object and the regular object will refer to the
7439 same memory location for the variable. */
7440
7441 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7442 to copy the initial value out of the dynamic object and into the
7443 runtime process image. We need to remember the offset into the
7444 .rela.bss section we are going to use. */
7445 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7446 {
7447 s = htab->elf.sdynrelro;
7448 srel = htab->elf.sreldynrelro;
7449 }
7450 else
7451 {
7452 s = htab->elf.sdynbss;
7453 srel = htab->elf.srelbss;
7454 }
7455 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7456 {
7457 srel->size += sizeof (Elf64_External_Rela);
7458 h->needs_copy = 1;
7459 }
7460
7461 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7462 }
7463
7464 /* If given a function descriptor symbol, hide both the function code
7465 sym and the descriptor. */
7466 static void
7467 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7468 struct elf_link_hash_entry *h,
7469 bfd_boolean force_local)
7470 {
7471 struct ppc_link_hash_entry *eh;
7472 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7473
7474 eh = (struct ppc_link_hash_entry *) h;
7475 if (eh->is_func_descriptor)
7476 {
7477 struct ppc_link_hash_entry *fh = eh->oh;
7478
7479 if (fh == NULL)
7480 {
7481 const char *p, *q;
7482 struct elf_link_hash_table *htab = elf_hash_table (info);
7483 char save;
7484
7485 /* We aren't supposed to use alloca in BFD because on
7486 systems which do not have alloca the version in libiberty
7487 calls xmalloc, which might cause the program to crash
7488 when it runs out of memory. This function doesn't have a
7489 return status, so there's no way to gracefully return an
7490 error. So cheat. We know that string[-1] can be safely
7491 accessed; It's either a string in an ELF string table,
7492 or allocated in an objalloc structure. */
7493
7494 p = eh->elf.root.root.string - 1;
7495 save = *p;
7496 *(char *) p = '.';
7497 fh = (struct ppc_link_hash_entry *)
7498 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7499 *(char *) p = save;
7500
7501 /* Unfortunately, if it so happens that the string we were
7502 looking for was allocated immediately before this string,
7503 then we overwrote the string terminator. That's the only
7504 reason the lookup should fail. */
7505 if (fh == NULL)
7506 {
7507 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7508 while (q >= eh->elf.root.root.string && *q == *p)
7509 --q, --p;
7510 if (q < eh->elf.root.root.string && *p == '.')
7511 fh = (struct ppc_link_hash_entry *)
7512 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7513 }
7514 if (fh != NULL)
7515 {
7516 eh->oh = fh;
7517 fh->oh = eh;
7518 }
7519 }
7520 if (fh != NULL)
7521 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7522 }
7523 }
7524
7525 static bfd_boolean
7526 get_sym_h (struct elf_link_hash_entry **hp,
7527 Elf_Internal_Sym **symp,
7528 asection **symsecp,
7529 unsigned char **tls_maskp,
7530 Elf_Internal_Sym **locsymsp,
7531 unsigned long r_symndx,
7532 bfd *ibfd)
7533 {
7534 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7535
7536 if (r_symndx >= symtab_hdr->sh_info)
7537 {
7538 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7539 struct elf_link_hash_entry *h;
7540
7541 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7542 h = elf_follow_link (h);
7543
7544 if (hp != NULL)
7545 *hp = h;
7546
7547 if (symp != NULL)
7548 *symp = NULL;
7549
7550 if (symsecp != NULL)
7551 {
7552 asection *symsec = NULL;
7553 if (h->root.type == bfd_link_hash_defined
7554 || h->root.type == bfd_link_hash_defweak)
7555 symsec = h->root.u.def.section;
7556 *symsecp = symsec;
7557 }
7558
7559 if (tls_maskp != NULL)
7560 {
7561 struct ppc_link_hash_entry *eh;
7562
7563 eh = (struct ppc_link_hash_entry *) h;
7564 *tls_maskp = &eh->tls_mask;
7565 }
7566 }
7567 else
7568 {
7569 Elf_Internal_Sym *sym;
7570 Elf_Internal_Sym *locsyms = *locsymsp;
7571
7572 if (locsyms == NULL)
7573 {
7574 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7575 if (locsyms == NULL)
7576 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7577 symtab_hdr->sh_info,
7578 0, NULL, NULL, NULL);
7579 if (locsyms == NULL)
7580 return FALSE;
7581 *locsymsp = locsyms;
7582 }
7583 sym = locsyms + r_symndx;
7584
7585 if (hp != NULL)
7586 *hp = NULL;
7587
7588 if (symp != NULL)
7589 *symp = sym;
7590
7591 if (symsecp != NULL)
7592 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7593
7594 if (tls_maskp != NULL)
7595 {
7596 struct got_entry **lgot_ents;
7597 unsigned char *tls_mask;
7598
7599 tls_mask = NULL;
7600 lgot_ents = elf_local_got_ents (ibfd);
7601 if (lgot_ents != NULL)
7602 {
7603 struct plt_entry **local_plt = (struct plt_entry **)
7604 (lgot_ents + symtab_hdr->sh_info);
7605 unsigned char *lgot_masks = (unsigned char *)
7606 (local_plt + symtab_hdr->sh_info);
7607 tls_mask = &lgot_masks[r_symndx];
7608 }
7609 *tls_maskp = tls_mask;
7610 }
7611 }
7612 return TRUE;
7613 }
7614
7615 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7616 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7617 type suitable for optimization, and 1 otherwise. */
7618
7619 static int
7620 get_tls_mask (unsigned char **tls_maskp,
7621 unsigned long *toc_symndx,
7622 bfd_vma *toc_addend,
7623 Elf_Internal_Sym **locsymsp,
7624 const Elf_Internal_Rela *rel,
7625 bfd *ibfd)
7626 {
7627 unsigned long r_symndx;
7628 int next_r;
7629 struct elf_link_hash_entry *h;
7630 Elf_Internal_Sym *sym;
7631 asection *sec;
7632 bfd_vma off;
7633
7634 r_symndx = ELF64_R_SYM (rel->r_info);
7635 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7636 return 0;
7637
7638 if ((*tls_maskp != NULL && **tls_maskp != 0)
7639 || sec == NULL
7640 || ppc64_elf_section_data (sec) == NULL
7641 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7642 return 1;
7643
7644 /* Look inside a TOC section too. */
7645 if (h != NULL)
7646 {
7647 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7648 off = h->root.u.def.value;
7649 }
7650 else
7651 off = sym->st_value;
7652 off += rel->r_addend;
7653 BFD_ASSERT (off % 8 == 0);
7654 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7655 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7656 if (toc_symndx != NULL)
7657 *toc_symndx = r_symndx;
7658 if (toc_addend != NULL)
7659 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7660 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7661 return 0;
7662 if ((h == NULL || is_static_defined (h))
7663 && (next_r == -1 || next_r == -2))
7664 return 1 - next_r;
7665 return 1;
7666 }
7667
7668 /* Find (or create) an entry in the tocsave hash table. */
7669
7670 static struct tocsave_entry *
7671 tocsave_find (struct ppc_link_hash_table *htab,
7672 enum insert_option insert,
7673 Elf_Internal_Sym **local_syms,
7674 const Elf_Internal_Rela *irela,
7675 bfd *ibfd)
7676 {
7677 unsigned long r_indx;
7678 struct elf_link_hash_entry *h;
7679 Elf_Internal_Sym *sym;
7680 struct tocsave_entry ent, *p;
7681 hashval_t hash;
7682 struct tocsave_entry **slot;
7683
7684 r_indx = ELF64_R_SYM (irela->r_info);
7685 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7686 return NULL;
7687 if (ent.sec == NULL || ent.sec->output_section == NULL)
7688 {
7689 _bfd_error_handler
7690 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7691 return NULL;
7692 }
7693
7694 if (h != NULL)
7695 ent.offset = h->root.u.def.value;
7696 else
7697 ent.offset = sym->st_value;
7698 ent.offset += irela->r_addend;
7699
7700 hash = tocsave_htab_hash (&ent);
7701 slot = ((struct tocsave_entry **)
7702 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7703 if (slot == NULL)
7704 return NULL;
7705
7706 if (*slot == NULL)
7707 {
7708 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7709 if (p == NULL)
7710 return NULL;
7711 *p = ent;
7712 *slot = p;
7713 }
7714 return *slot;
7715 }
7716
7717 /* Adjust all global syms defined in opd sections. In gcc generated
7718 code for the old ABI, these will already have been done. */
7719
7720 static bfd_boolean
7721 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7722 {
7723 struct ppc_link_hash_entry *eh;
7724 asection *sym_sec;
7725 struct _opd_sec_data *opd;
7726
7727 if (h->root.type == bfd_link_hash_indirect)
7728 return TRUE;
7729
7730 if (h->root.type != bfd_link_hash_defined
7731 && h->root.type != bfd_link_hash_defweak)
7732 return TRUE;
7733
7734 eh = (struct ppc_link_hash_entry *) h;
7735 if (eh->adjust_done)
7736 return TRUE;
7737
7738 sym_sec = eh->elf.root.u.def.section;
7739 opd = get_opd_info (sym_sec);
7740 if (opd != NULL && opd->adjust != NULL)
7741 {
7742 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7743 if (adjust == -1)
7744 {
7745 /* This entry has been deleted. */
7746 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7747 if (dsec == NULL)
7748 {
7749 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7750 if (discarded_section (dsec))
7751 {
7752 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7753 break;
7754 }
7755 }
7756 eh->elf.root.u.def.value = 0;
7757 eh->elf.root.u.def.section = dsec;
7758 }
7759 else
7760 eh->elf.root.u.def.value += adjust;
7761 eh->adjust_done = 1;
7762 }
7763 return TRUE;
7764 }
7765
7766 /* Handles decrementing dynamic reloc counts for the reloc specified by
7767 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7768 have already been determined. */
7769
7770 static bfd_boolean
7771 dec_dynrel_count (bfd_vma r_info,
7772 asection *sec,
7773 struct bfd_link_info *info,
7774 Elf_Internal_Sym **local_syms,
7775 struct elf_link_hash_entry *h,
7776 Elf_Internal_Sym *sym)
7777 {
7778 enum elf_ppc64_reloc_type r_type;
7779 asection *sym_sec = NULL;
7780
7781 /* Can this reloc be dynamic? This switch, and later tests here
7782 should be kept in sync with the code in check_relocs. */
7783 r_type = ELF64_R_TYPE (r_info);
7784 switch (r_type)
7785 {
7786 default:
7787 return TRUE;
7788
7789 case R_PPC64_TPREL16:
7790 case R_PPC64_TPREL16_LO:
7791 case R_PPC64_TPREL16_HI:
7792 case R_PPC64_TPREL16_HA:
7793 case R_PPC64_TPREL16_DS:
7794 case R_PPC64_TPREL16_LO_DS:
7795 case R_PPC64_TPREL16_HIGH:
7796 case R_PPC64_TPREL16_HIGHA:
7797 case R_PPC64_TPREL16_HIGHER:
7798 case R_PPC64_TPREL16_HIGHERA:
7799 case R_PPC64_TPREL16_HIGHEST:
7800 case R_PPC64_TPREL16_HIGHESTA:
7801 if (!bfd_link_pic (info))
7802 return TRUE;
7803
7804 case R_PPC64_TPREL64:
7805 case R_PPC64_DTPMOD64:
7806 case R_PPC64_DTPREL64:
7807 case R_PPC64_ADDR64:
7808 case R_PPC64_REL30:
7809 case R_PPC64_REL32:
7810 case R_PPC64_REL64:
7811 case R_PPC64_ADDR14:
7812 case R_PPC64_ADDR14_BRNTAKEN:
7813 case R_PPC64_ADDR14_BRTAKEN:
7814 case R_PPC64_ADDR16:
7815 case R_PPC64_ADDR16_DS:
7816 case R_PPC64_ADDR16_HA:
7817 case R_PPC64_ADDR16_HI:
7818 case R_PPC64_ADDR16_HIGH:
7819 case R_PPC64_ADDR16_HIGHA:
7820 case R_PPC64_ADDR16_HIGHER:
7821 case R_PPC64_ADDR16_HIGHERA:
7822 case R_PPC64_ADDR16_HIGHEST:
7823 case R_PPC64_ADDR16_HIGHESTA:
7824 case R_PPC64_ADDR16_LO:
7825 case R_PPC64_ADDR16_LO_DS:
7826 case R_PPC64_ADDR24:
7827 case R_PPC64_ADDR32:
7828 case R_PPC64_UADDR16:
7829 case R_PPC64_UADDR32:
7830 case R_PPC64_UADDR64:
7831 case R_PPC64_TOC:
7832 break;
7833 }
7834
7835 if (local_syms != NULL)
7836 {
7837 unsigned long r_symndx;
7838 bfd *ibfd = sec->owner;
7839
7840 r_symndx = ELF64_R_SYM (r_info);
7841 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7842 return FALSE;
7843 }
7844
7845 if ((bfd_link_pic (info)
7846 && (must_be_dyn_reloc (info, r_type)
7847 || (h != NULL
7848 && (!SYMBOLIC_BIND (info, h)
7849 || h->root.type == bfd_link_hash_defweak
7850 || !h->def_regular))))
7851 || (ELIMINATE_COPY_RELOCS
7852 && !bfd_link_pic (info)
7853 && h != NULL
7854 && (h->root.type == bfd_link_hash_defweak
7855 || !h->def_regular)))
7856 ;
7857 else
7858 return TRUE;
7859
7860 if (h != NULL)
7861 {
7862 struct elf_dyn_relocs *p;
7863 struct elf_dyn_relocs **pp;
7864 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7865
7866 /* elf_gc_sweep may have already removed all dyn relocs associated
7867 with local syms for a given section. Also, symbol flags are
7868 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7869 report a dynreloc miscount. */
7870 if (*pp == NULL && info->gc_sections)
7871 return TRUE;
7872
7873 while ((p = *pp) != NULL)
7874 {
7875 if (p->sec == sec)
7876 {
7877 if (!must_be_dyn_reloc (info, r_type))
7878 p->pc_count -= 1;
7879 p->count -= 1;
7880 if (p->count == 0)
7881 *pp = p->next;
7882 return TRUE;
7883 }
7884 pp = &p->next;
7885 }
7886 }
7887 else
7888 {
7889 struct ppc_dyn_relocs *p;
7890 struct ppc_dyn_relocs **pp;
7891 void *vpp;
7892 bfd_boolean is_ifunc;
7893
7894 if (local_syms == NULL)
7895 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7896 if (sym_sec == NULL)
7897 sym_sec = sec;
7898
7899 vpp = &elf_section_data (sym_sec)->local_dynrel;
7900 pp = (struct ppc_dyn_relocs **) vpp;
7901
7902 if (*pp == NULL && info->gc_sections)
7903 return TRUE;
7904
7905 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7906 while ((p = *pp) != NULL)
7907 {
7908 if (p->sec == sec && p->ifunc == is_ifunc)
7909 {
7910 p->count -= 1;
7911 if (p->count == 0)
7912 *pp = p->next;
7913 return TRUE;
7914 }
7915 pp = &p->next;
7916 }
7917 }
7918
7919 /* xgettext:c-format */
7920 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7921 sec->owner, sec);
7922 bfd_set_error (bfd_error_bad_value);
7923 return FALSE;
7924 }
7925
7926 /* Remove unused Official Procedure Descriptor entries. Currently we
7927 only remove those associated with functions in discarded link-once
7928 sections, or weakly defined functions that have been overridden. It
7929 would be possible to remove many more entries for statically linked
7930 applications. */
7931
7932 bfd_boolean
7933 ppc64_elf_edit_opd (struct bfd_link_info *info)
7934 {
7935 bfd *ibfd;
7936 bfd_boolean some_edited = FALSE;
7937 asection *need_pad = NULL;
7938 struct ppc_link_hash_table *htab;
7939
7940 htab = ppc_hash_table (info);
7941 if (htab == NULL)
7942 return FALSE;
7943
7944 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7945 {
7946 asection *sec;
7947 Elf_Internal_Rela *relstart, *rel, *relend;
7948 Elf_Internal_Shdr *symtab_hdr;
7949 Elf_Internal_Sym *local_syms;
7950 struct _opd_sec_data *opd;
7951 bfd_boolean need_edit, add_aux_fields, broken;
7952 bfd_size_type cnt_16b = 0;
7953
7954 if (!is_ppc64_elf (ibfd))
7955 continue;
7956
7957 sec = bfd_get_section_by_name (ibfd, ".opd");
7958 if (sec == NULL || sec->size == 0)
7959 continue;
7960
7961 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7962 continue;
7963
7964 if (sec->output_section == bfd_abs_section_ptr)
7965 continue;
7966
7967 /* Look through the section relocs. */
7968 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7969 continue;
7970
7971 local_syms = NULL;
7972 symtab_hdr = &elf_symtab_hdr (ibfd);
7973
7974 /* Read the relocations. */
7975 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7976 info->keep_memory);
7977 if (relstart == NULL)
7978 return FALSE;
7979
7980 /* First run through the relocs to check they are sane, and to
7981 determine whether we need to edit this opd section. */
7982 need_edit = FALSE;
7983 broken = FALSE;
7984 need_pad = sec;
7985 relend = relstart + sec->reloc_count;
7986 for (rel = relstart; rel < relend; )
7987 {
7988 enum elf_ppc64_reloc_type r_type;
7989 unsigned long r_symndx;
7990 asection *sym_sec;
7991 struct elf_link_hash_entry *h;
7992 Elf_Internal_Sym *sym;
7993 bfd_vma offset;
7994
7995 /* .opd contains an array of 16 or 24 byte entries. We're
7996 only interested in the reloc pointing to a function entry
7997 point. */
7998 offset = rel->r_offset;
7999 if (rel + 1 == relend
8000 || rel[1].r_offset != offset + 8)
8001 {
8002 /* If someone messes with .opd alignment then after a
8003 "ld -r" we might have padding in the middle of .opd.
8004 Also, there's nothing to prevent someone putting
8005 something silly in .opd with the assembler. No .opd
8006 optimization for them! */
8007 broken_opd:
8008 _bfd_error_handler
8009 (_("%B: .opd is not a regular array of opd entries"), ibfd);
8010 broken = TRUE;
8011 break;
8012 }
8013
8014 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
8015 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
8016 {
8017 _bfd_error_handler
8018 /* xgettext:c-format */
8019 (_("%B: unexpected reloc type %u in .opd section"),
8020 ibfd, r_type);
8021 broken = TRUE;
8022 break;
8023 }
8024
8025 r_symndx = ELF64_R_SYM (rel->r_info);
8026 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8027 r_symndx, ibfd))
8028 goto error_ret;
8029
8030 if (sym_sec == NULL || sym_sec->owner == NULL)
8031 {
8032 const char *sym_name;
8033 if (h != NULL)
8034 sym_name = h->root.root.string;
8035 else
8036 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8037 sym_sec);
8038
8039 _bfd_error_handler
8040 /* xgettext:c-format */
8041 (_("%B: undefined sym `%s' in .opd section"),
8042 ibfd, sym_name);
8043 broken = TRUE;
8044 break;
8045 }
8046
8047 /* opd entries are always for functions defined in the
8048 current input bfd. If the symbol isn't defined in the
8049 input bfd, then we won't be using the function in this
8050 bfd; It must be defined in a linkonce section in another
8051 bfd, or is weak. It's also possible that we are
8052 discarding the function due to a linker script /DISCARD/,
8053 which we test for via the output_section. */
8054 if (sym_sec->owner != ibfd
8055 || sym_sec->output_section == bfd_abs_section_ptr)
8056 need_edit = TRUE;
8057
8058 rel += 2;
8059 if (rel + 1 == relend
8060 || (rel + 2 < relend
8061 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8062 ++rel;
8063
8064 if (rel == relend)
8065 {
8066 if (sec->size == offset + 24)
8067 {
8068 need_pad = NULL;
8069 break;
8070 }
8071 if (sec->size == offset + 16)
8072 {
8073 cnt_16b++;
8074 break;
8075 }
8076 goto broken_opd;
8077 }
8078 else if (rel + 1 < relend
8079 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8080 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8081 {
8082 if (rel[0].r_offset == offset + 16)
8083 cnt_16b++;
8084 else if (rel[0].r_offset != offset + 24)
8085 goto broken_opd;
8086 }
8087 else
8088 goto broken_opd;
8089 }
8090
8091 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8092
8093 if (!broken && (need_edit || add_aux_fields))
8094 {
8095 Elf_Internal_Rela *write_rel;
8096 Elf_Internal_Shdr *rel_hdr;
8097 bfd_byte *rptr, *wptr;
8098 bfd_byte *new_contents;
8099 bfd_size_type amt;
8100
8101 new_contents = NULL;
8102 amt = OPD_NDX (sec->size) * sizeof (long);
8103 opd = &ppc64_elf_section_data (sec)->u.opd;
8104 opd->adjust = bfd_zalloc (sec->owner, amt);
8105 if (opd->adjust == NULL)
8106 return FALSE;
8107 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8108
8109 /* This seems a waste of time as input .opd sections are all
8110 zeros as generated by gcc, but I suppose there's no reason
8111 this will always be so. We might start putting something in
8112 the third word of .opd entries. */
8113 if ((sec->flags & SEC_IN_MEMORY) == 0)
8114 {
8115 bfd_byte *loc;
8116 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8117 {
8118 if (loc != NULL)
8119 free (loc);
8120 error_ret:
8121 if (local_syms != NULL
8122 && symtab_hdr->contents != (unsigned char *) local_syms)
8123 free (local_syms);
8124 if (elf_section_data (sec)->relocs != relstart)
8125 free (relstart);
8126 return FALSE;
8127 }
8128 sec->contents = loc;
8129 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8130 }
8131
8132 elf_section_data (sec)->relocs = relstart;
8133
8134 new_contents = sec->contents;
8135 if (add_aux_fields)
8136 {
8137 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8138 if (new_contents == NULL)
8139 return FALSE;
8140 need_pad = NULL;
8141 }
8142 wptr = new_contents;
8143 rptr = sec->contents;
8144 write_rel = relstart;
8145 for (rel = relstart; rel < relend; )
8146 {
8147 unsigned long r_symndx;
8148 asection *sym_sec;
8149 struct elf_link_hash_entry *h;
8150 struct ppc_link_hash_entry *fdh = NULL;
8151 Elf_Internal_Sym *sym;
8152 long opd_ent_size;
8153 Elf_Internal_Rela *next_rel;
8154 bfd_boolean skip;
8155
8156 r_symndx = ELF64_R_SYM (rel->r_info);
8157 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8158 r_symndx, ibfd))
8159 goto error_ret;
8160
8161 next_rel = rel + 2;
8162 if (next_rel + 1 == relend
8163 || (next_rel + 2 < relend
8164 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8165 ++next_rel;
8166
8167 /* See if the .opd entry is full 24 byte or
8168 16 byte (with fd_aux entry overlapped with next
8169 fd_func). */
8170 opd_ent_size = 24;
8171 if (next_rel == relend)
8172 {
8173 if (sec->size == rel->r_offset + 16)
8174 opd_ent_size = 16;
8175 }
8176 else if (next_rel->r_offset == rel->r_offset + 16)
8177 opd_ent_size = 16;
8178
8179 if (h != NULL
8180 && h->root.root.string[0] == '.')
8181 {
8182 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8183 if (fdh != NULL)
8184 {
8185 fdh = ppc_follow_link (fdh);
8186 if (fdh->elf.root.type != bfd_link_hash_defined
8187 && fdh->elf.root.type != bfd_link_hash_defweak)
8188 fdh = NULL;
8189 }
8190 }
8191
8192 skip = (sym_sec->owner != ibfd
8193 || sym_sec->output_section == bfd_abs_section_ptr);
8194 if (skip)
8195 {
8196 if (fdh != NULL && sym_sec->owner == ibfd)
8197 {
8198 /* Arrange for the function descriptor sym
8199 to be dropped. */
8200 fdh->elf.root.u.def.value = 0;
8201 fdh->elf.root.u.def.section = sym_sec;
8202 }
8203 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8204
8205 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8206 rel = next_rel;
8207 else
8208 while (1)
8209 {
8210 if (!dec_dynrel_count (rel->r_info, sec, info,
8211 NULL, h, sym))
8212 goto error_ret;
8213
8214 if (++rel == next_rel)
8215 break;
8216
8217 r_symndx = ELF64_R_SYM (rel->r_info);
8218 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8219 r_symndx, ibfd))
8220 goto error_ret;
8221 }
8222 }
8223 else
8224 {
8225 /* We'll be keeping this opd entry. */
8226 long adjust;
8227
8228 if (fdh != NULL)
8229 {
8230 /* Redefine the function descriptor symbol to
8231 this location in the opd section. It is
8232 necessary to update the value here rather
8233 than using an array of adjustments as we do
8234 for local symbols, because various places
8235 in the generic ELF code use the value
8236 stored in u.def.value. */
8237 fdh->elf.root.u.def.value = wptr - new_contents;
8238 fdh->adjust_done = 1;
8239 }
8240
8241 /* Local syms are a bit tricky. We could
8242 tweak them as they can be cached, but
8243 we'd need to look through the local syms
8244 for the function descriptor sym which we
8245 don't have at the moment. So keep an
8246 array of adjustments. */
8247 adjust = (wptr - new_contents) - (rptr - sec->contents);
8248 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8249
8250 if (wptr != rptr)
8251 memcpy (wptr, rptr, opd_ent_size);
8252 wptr += opd_ent_size;
8253 if (add_aux_fields && opd_ent_size == 16)
8254 {
8255 memset (wptr, '\0', 8);
8256 wptr += 8;
8257 }
8258
8259 /* We need to adjust any reloc offsets to point to the
8260 new opd entries. */
8261 for ( ; rel != next_rel; ++rel)
8262 {
8263 rel->r_offset += adjust;
8264 if (write_rel != rel)
8265 memcpy (write_rel, rel, sizeof (*rel));
8266 ++write_rel;
8267 }
8268 }
8269
8270 rptr += opd_ent_size;
8271 }
8272
8273 sec->size = wptr - new_contents;
8274 sec->reloc_count = write_rel - relstart;
8275 if (add_aux_fields)
8276 {
8277 free (sec->contents);
8278 sec->contents = new_contents;
8279 }
8280
8281 /* Fudge the header size too, as this is used later in
8282 elf_bfd_final_link if we are emitting relocs. */
8283 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8284 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8285 some_edited = TRUE;
8286 }
8287 else if (elf_section_data (sec)->relocs != relstart)
8288 free (relstart);
8289
8290 if (local_syms != NULL
8291 && symtab_hdr->contents != (unsigned char *) local_syms)
8292 {
8293 if (!info->keep_memory)
8294 free (local_syms);
8295 else
8296 symtab_hdr->contents = (unsigned char *) local_syms;
8297 }
8298 }
8299
8300 if (some_edited)
8301 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8302
8303 /* If we are doing a final link and the last .opd entry is just 16 byte
8304 long, add a 8 byte padding after it. */
8305 if (need_pad != NULL && !bfd_link_relocatable (info))
8306 {
8307 bfd_byte *p;
8308
8309 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8310 {
8311 BFD_ASSERT (need_pad->size > 0);
8312
8313 p = bfd_malloc (need_pad->size + 8);
8314 if (p == NULL)
8315 return FALSE;
8316
8317 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8318 p, 0, need_pad->size))
8319 return FALSE;
8320
8321 need_pad->contents = p;
8322 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8323 }
8324 else
8325 {
8326 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8327 if (p == NULL)
8328 return FALSE;
8329
8330 need_pad->contents = p;
8331 }
8332
8333 memset (need_pad->contents + need_pad->size, 0, 8);
8334 need_pad->size += 8;
8335 }
8336
8337 return TRUE;
8338 }
8339
8340 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8341
8342 asection *
8343 ppc64_elf_tls_setup (struct bfd_link_info *info)
8344 {
8345 struct ppc_link_hash_table *htab;
8346
8347 htab = ppc_hash_table (info);
8348 if (htab == NULL)
8349 return NULL;
8350
8351 if (abiversion (info->output_bfd) == 1)
8352 htab->opd_abi = 1;
8353
8354 if (htab->params->no_multi_toc)
8355 htab->do_multi_toc = 0;
8356 else if (!htab->do_multi_toc)
8357 htab->params->no_multi_toc = 1;
8358
8359 /* Default to --no-plt-localentry, as this option can cause problems
8360 with symbol interposition. For example, glibc libpthread.so and
8361 libc.so duplicate many pthread symbols, with a fallback
8362 implementation in libc.so. In some cases the fallback does more
8363 work than the pthread implementation. __pthread_condattr_destroy
8364 is one such symbol: the libpthread.so implementation is
8365 localentry:0 while the libc.so implementation is localentry:8.
8366 An app that "cleverly" uses dlopen to only load necessary
8367 libraries at runtime may omit loading libpthread.so when not
8368 running multi-threaded, which then results in the libc.so
8369 fallback symbols being used and ld.so complaining. Now there
8370 are workarounds in ld (see non_zero_localentry) to detect the
8371 pthread situation, but that may not be the only case where
8372 --plt-localentry can cause trouble. */
8373 if (htab->params->plt_localentry0 < 0)
8374 htab->params->plt_localentry0 = 0;
8375 if (htab->params->plt_localentry0
8376 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8377 FALSE, FALSE, FALSE) == NULL)
8378 info->callbacks->einfo
8379 (_("%P: warning: --plt-localentry is especially dangerous without "
8380 "ld.so support to detect ABI violations.\n"));
8381
8382 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8383 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8384 FALSE, FALSE, TRUE));
8385 /* Move dynamic linking info to the function descriptor sym. */
8386 if (htab->tls_get_addr != NULL)
8387 func_desc_adjust (&htab->tls_get_addr->elf, info);
8388 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8389 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8390 FALSE, FALSE, TRUE));
8391 if (htab->params->tls_get_addr_opt)
8392 {
8393 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8394
8395 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8396 FALSE, FALSE, TRUE);
8397 if (opt != NULL)
8398 func_desc_adjust (opt, info);
8399 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8400 FALSE, FALSE, TRUE);
8401 if (opt_fd != NULL
8402 && (opt_fd->root.type == bfd_link_hash_defined
8403 || opt_fd->root.type == bfd_link_hash_defweak))
8404 {
8405 /* If glibc supports an optimized __tls_get_addr call stub,
8406 signalled by the presence of __tls_get_addr_opt, and we'll
8407 be calling __tls_get_addr via a plt call stub, then
8408 make __tls_get_addr point to __tls_get_addr_opt. */
8409 tga_fd = &htab->tls_get_addr_fd->elf;
8410 if (htab->elf.dynamic_sections_created
8411 && tga_fd != NULL
8412 && (tga_fd->type == STT_FUNC
8413 || tga_fd->needs_plt)
8414 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8415 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8416 {
8417 struct plt_entry *ent;
8418
8419 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8420 if (ent->plt.refcount > 0)
8421 break;
8422 if (ent != NULL)
8423 {
8424 tga_fd->root.type = bfd_link_hash_indirect;
8425 tga_fd->root.u.i.link = &opt_fd->root;
8426 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8427 opt_fd->mark = 1;
8428 if (opt_fd->dynindx != -1)
8429 {
8430 /* Use __tls_get_addr_opt in dynamic relocations. */
8431 opt_fd->dynindx = -1;
8432 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8433 opt_fd->dynstr_index);
8434 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8435 return NULL;
8436 }
8437 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8438 tga = &htab->tls_get_addr->elf;
8439 if (opt != NULL && tga != NULL)
8440 {
8441 tga->root.type = bfd_link_hash_indirect;
8442 tga->root.u.i.link = &opt->root;
8443 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8444 opt->mark = 1;
8445 _bfd_elf_link_hash_hide_symbol (info, opt,
8446 tga->forced_local);
8447 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8448 }
8449 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8450 htab->tls_get_addr_fd->is_func_descriptor = 1;
8451 if (htab->tls_get_addr != NULL)
8452 {
8453 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8454 htab->tls_get_addr->is_func = 1;
8455 }
8456 }
8457 }
8458 }
8459 else if (htab->params->tls_get_addr_opt < 0)
8460 htab->params->tls_get_addr_opt = 0;
8461 }
8462 return _bfd_elf_tls_setup (info->output_bfd, info);
8463 }
8464
8465 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8466 HASH1 or HASH2. */
8467
8468 static bfd_boolean
8469 branch_reloc_hash_match (const bfd *ibfd,
8470 const Elf_Internal_Rela *rel,
8471 const struct ppc_link_hash_entry *hash1,
8472 const struct ppc_link_hash_entry *hash2)
8473 {
8474 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8475 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8476 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8477
8478 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8479 {
8480 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8481 struct elf_link_hash_entry *h;
8482
8483 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8484 h = elf_follow_link (h);
8485 if (h == &hash1->elf || h == &hash2->elf)
8486 return TRUE;
8487 }
8488 return FALSE;
8489 }
8490
8491 /* Run through all the TLS relocs looking for optimization
8492 opportunities. The linker has been hacked (see ppc64elf.em) to do
8493 a preliminary section layout so that we know the TLS segment
8494 offsets. We can't optimize earlier because some optimizations need
8495 to know the tp offset, and we need to optimize before allocating
8496 dynamic relocations. */
8497
8498 bfd_boolean
8499 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8500 {
8501 bfd *ibfd;
8502 asection *sec;
8503 struct ppc_link_hash_table *htab;
8504 unsigned char *toc_ref;
8505 int pass;
8506
8507 if (!bfd_link_executable (info))
8508 return TRUE;
8509
8510 htab = ppc_hash_table (info);
8511 if (htab == NULL)
8512 return FALSE;
8513
8514 /* Make two passes over the relocs. On the first pass, mark toc
8515 entries involved with tls relocs, and check that tls relocs
8516 involved in setting up a tls_get_addr call are indeed followed by
8517 such a call. If they are not, we can't do any tls optimization.
8518 On the second pass twiddle tls_mask flags to notify
8519 relocate_section that optimization can be done, and adjust got
8520 and plt refcounts. */
8521 toc_ref = NULL;
8522 for (pass = 0; pass < 2; ++pass)
8523 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8524 {
8525 Elf_Internal_Sym *locsyms = NULL;
8526 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8527
8528 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8529 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8530 {
8531 Elf_Internal_Rela *relstart, *rel, *relend;
8532 bfd_boolean found_tls_get_addr_arg = 0;
8533
8534 /* Read the relocations. */
8535 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8536 info->keep_memory);
8537 if (relstart == NULL)
8538 {
8539 free (toc_ref);
8540 return FALSE;
8541 }
8542
8543 relend = relstart + sec->reloc_count;
8544 for (rel = relstart; rel < relend; rel++)
8545 {
8546 enum elf_ppc64_reloc_type r_type;
8547 unsigned long r_symndx;
8548 struct elf_link_hash_entry *h;
8549 Elf_Internal_Sym *sym;
8550 asection *sym_sec;
8551 unsigned char *tls_mask;
8552 unsigned char tls_set, tls_clear, tls_type = 0;
8553 bfd_vma value;
8554 bfd_boolean ok_tprel, is_local;
8555 long toc_ref_index = 0;
8556 int expecting_tls_get_addr = 0;
8557 bfd_boolean ret = FALSE;
8558
8559 r_symndx = ELF64_R_SYM (rel->r_info);
8560 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8561 r_symndx, ibfd))
8562 {
8563 err_free_rel:
8564 if (elf_section_data (sec)->relocs != relstart)
8565 free (relstart);
8566 if (toc_ref != NULL)
8567 free (toc_ref);
8568 if (locsyms != NULL
8569 && (elf_symtab_hdr (ibfd).contents
8570 != (unsigned char *) locsyms))
8571 free (locsyms);
8572 return ret;
8573 }
8574
8575 if (h != NULL)
8576 {
8577 if (h->root.type == bfd_link_hash_defined
8578 || h->root.type == bfd_link_hash_defweak)
8579 value = h->root.u.def.value;
8580 else if (h->root.type == bfd_link_hash_undefweak)
8581 value = 0;
8582 else
8583 {
8584 found_tls_get_addr_arg = 0;
8585 continue;
8586 }
8587 }
8588 else
8589 /* Symbols referenced by TLS relocs must be of type
8590 STT_TLS. So no need for .opd local sym adjust. */
8591 value = sym->st_value;
8592
8593 ok_tprel = FALSE;
8594 is_local = FALSE;
8595 if (h == NULL
8596 || !h->def_dynamic)
8597 {
8598 is_local = TRUE;
8599 if (h != NULL
8600 && h->root.type == bfd_link_hash_undefweak)
8601 ok_tprel = TRUE;
8602 else if (sym_sec != NULL
8603 && sym_sec->output_section != NULL)
8604 {
8605 value += sym_sec->output_offset;
8606 value += sym_sec->output_section->vma;
8607 value -= htab->elf.tls_sec->vma;
8608 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8609 < (bfd_vma) 1 << 32);
8610 }
8611 }
8612
8613 r_type = ELF64_R_TYPE (rel->r_info);
8614 /* If this section has old-style __tls_get_addr calls
8615 without marker relocs, then check that each
8616 __tls_get_addr call reloc is preceded by a reloc
8617 that conceivably belongs to the __tls_get_addr arg
8618 setup insn. If we don't find matching arg setup
8619 relocs, don't do any tls optimization. */
8620 if (pass == 0
8621 && sec->has_tls_get_addr_call
8622 && h != NULL
8623 && (h == &htab->tls_get_addr->elf
8624 || h == &htab->tls_get_addr_fd->elf)
8625 && !found_tls_get_addr_arg
8626 && is_branch_reloc (r_type))
8627 {
8628 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8629 "TLS optimization disabled\n"),
8630 ibfd, sec, rel->r_offset);
8631 ret = TRUE;
8632 goto err_free_rel;
8633 }
8634
8635 found_tls_get_addr_arg = 0;
8636 switch (r_type)
8637 {
8638 case R_PPC64_GOT_TLSLD16:
8639 case R_PPC64_GOT_TLSLD16_LO:
8640 expecting_tls_get_addr = 1;
8641 found_tls_get_addr_arg = 1;
8642 /* Fall through. */
8643
8644 case R_PPC64_GOT_TLSLD16_HI:
8645 case R_PPC64_GOT_TLSLD16_HA:
8646 /* These relocs should never be against a symbol
8647 defined in a shared lib. Leave them alone if
8648 that turns out to be the case. */
8649 if (!is_local)
8650 continue;
8651
8652 /* LD -> LE */
8653 tls_set = 0;
8654 tls_clear = TLS_LD;
8655 tls_type = TLS_TLS | TLS_LD;
8656 break;
8657
8658 case R_PPC64_GOT_TLSGD16:
8659 case R_PPC64_GOT_TLSGD16_LO:
8660 expecting_tls_get_addr = 1;
8661 found_tls_get_addr_arg = 1;
8662 /* Fall through. */
8663
8664 case R_PPC64_GOT_TLSGD16_HI:
8665 case R_PPC64_GOT_TLSGD16_HA:
8666 if (ok_tprel)
8667 /* GD -> LE */
8668 tls_set = 0;
8669 else
8670 /* GD -> IE */
8671 tls_set = TLS_TLS | TLS_TPRELGD;
8672 tls_clear = TLS_GD;
8673 tls_type = TLS_TLS | TLS_GD;
8674 break;
8675
8676 case R_PPC64_GOT_TPREL16_DS:
8677 case R_PPC64_GOT_TPREL16_LO_DS:
8678 case R_PPC64_GOT_TPREL16_HI:
8679 case R_PPC64_GOT_TPREL16_HA:
8680 if (ok_tprel)
8681 {
8682 /* IE -> LE */
8683 tls_set = 0;
8684 tls_clear = TLS_TPREL;
8685 tls_type = TLS_TLS | TLS_TPREL;
8686 break;
8687 }
8688 continue;
8689
8690 case R_PPC64_TLSGD:
8691 case R_PPC64_TLSLD:
8692 found_tls_get_addr_arg = 1;
8693 /* Fall through. */
8694
8695 case R_PPC64_TLS:
8696 case R_PPC64_TOC16:
8697 case R_PPC64_TOC16_LO:
8698 if (sym_sec == NULL || sym_sec != toc)
8699 continue;
8700
8701 /* Mark this toc entry as referenced by a TLS
8702 code sequence. We can do that now in the
8703 case of R_PPC64_TLS, and after checking for
8704 tls_get_addr for the TOC16 relocs. */
8705 if (toc_ref == NULL)
8706 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8707 if (toc_ref == NULL)
8708 goto err_free_rel;
8709
8710 if (h != NULL)
8711 value = h->root.u.def.value;
8712 else
8713 value = sym->st_value;
8714 value += rel->r_addend;
8715 if (value % 8 != 0)
8716 continue;
8717 BFD_ASSERT (value < toc->size
8718 && toc->output_offset % 8 == 0);
8719 toc_ref_index = (value + toc->output_offset) / 8;
8720 if (r_type == R_PPC64_TLS
8721 || r_type == R_PPC64_TLSGD
8722 || r_type == R_PPC64_TLSLD)
8723 {
8724 toc_ref[toc_ref_index] = 1;
8725 continue;
8726 }
8727
8728 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8729 continue;
8730
8731 tls_set = 0;
8732 tls_clear = 0;
8733 expecting_tls_get_addr = 2;
8734 break;
8735
8736 case R_PPC64_TPREL64:
8737 if (pass == 0
8738 || sec != toc
8739 || toc_ref == NULL
8740 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8741 continue;
8742 if (ok_tprel)
8743 {
8744 /* IE -> LE */
8745 tls_set = TLS_EXPLICIT;
8746 tls_clear = TLS_TPREL;
8747 break;
8748 }
8749 continue;
8750
8751 case R_PPC64_DTPMOD64:
8752 if (pass == 0
8753 || sec != toc
8754 || toc_ref == NULL
8755 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8756 continue;
8757 if (rel + 1 < relend
8758 && (rel[1].r_info
8759 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8760 && rel[1].r_offset == rel->r_offset + 8)
8761 {
8762 if (ok_tprel)
8763 /* GD -> LE */
8764 tls_set = TLS_EXPLICIT | TLS_GD;
8765 else
8766 /* GD -> IE */
8767 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8768 tls_clear = TLS_GD;
8769 }
8770 else
8771 {
8772 if (!is_local)
8773 continue;
8774
8775 /* LD -> LE */
8776 tls_set = TLS_EXPLICIT;
8777 tls_clear = TLS_LD;
8778 }
8779 break;
8780
8781 default:
8782 continue;
8783 }
8784
8785 if (pass == 0)
8786 {
8787 if (!expecting_tls_get_addr
8788 || !sec->has_tls_get_addr_call)
8789 continue;
8790
8791 if (rel + 1 < relend
8792 && branch_reloc_hash_match (ibfd, rel + 1,
8793 htab->tls_get_addr,
8794 htab->tls_get_addr_fd))
8795 {
8796 if (expecting_tls_get_addr == 2)
8797 {
8798 /* Check for toc tls entries. */
8799 unsigned char *toc_tls;
8800 int retval;
8801
8802 retval = get_tls_mask (&toc_tls, NULL, NULL,
8803 &locsyms,
8804 rel, ibfd);
8805 if (retval == 0)
8806 goto err_free_rel;
8807 if (toc_tls != NULL)
8808 {
8809 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8810 found_tls_get_addr_arg = 1;
8811 if (retval > 1)
8812 toc_ref[toc_ref_index] = 1;
8813 }
8814 }
8815 continue;
8816 }
8817
8818 if (expecting_tls_get_addr != 1)
8819 continue;
8820
8821 /* Uh oh, we didn't find the expected call. We
8822 could just mark this symbol to exclude it
8823 from tls optimization but it's safer to skip
8824 the entire optimization. */
8825 /* xgettext:c-format */
8826 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8827 "TLS optimization disabled\n"),
8828 ibfd, sec, rel->r_offset);
8829 ret = TRUE;
8830 goto err_free_rel;
8831 }
8832
8833 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8834 {
8835 struct plt_entry *ent;
8836 for (ent = htab->tls_get_addr->elf.plt.plist;
8837 ent != NULL;
8838 ent = ent->next)
8839 if (ent->addend == 0)
8840 {
8841 if (ent->plt.refcount > 0)
8842 {
8843 ent->plt.refcount -= 1;
8844 expecting_tls_get_addr = 0;
8845 }
8846 break;
8847 }
8848 }
8849
8850 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8851 {
8852 struct plt_entry *ent;
8853 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8854 ent != NULL;
8855 ent = ent->next)
8856 if (ent->addend == 0)
8857 {
8858 if (ent->plt.refcount > 0)
8859 ent->plt.refcount -= 1;
8860 break;
8861 }
8862 }
8863
8864 if (tls_clear == 0)
8865 continue;
8866
8867 if ((tls_set & TLS_EXPLICIT) == 0)
8868 {
8869 struct got_entry *ent;
8870
8871 /* Adjust got entry for this reloc. */
8872 if (h != NULL)
8873 ent = h->got.glist;
8874 else
8875 ent = elf_local_got_ents (ibfd)[r_symndx];
8876
8877 for (; ent != NULL; ent = ent->next)
8878 if (ent->addend == rel->r_addend
8879 && ent->owner == ibfd
8880 && ent->tls_type == tls_type)
8881 break;
8882 if (ent == NULL)
8883 abort ();
8884
8885 if (tls_set == 0)
8886 {
8887 /* We managed to get rid of a got entry. */
8888 if (ent->got.refcount > 0)
8889 ent->got.refcount -= 1;
8890 }
8891 }
8892 else
8893 {
8894 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8895 we'll lose one or two dyn relocs. */
8896 if (!dec_dynrel_count (rel->r_info, sec, info,
8897 NULL, h, sym))
8898 return FALSE;
8899
8900 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8901 {
8902 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8903 NULL, h, sym))
8904 return FALSE;
8905 }
8906 }
8907
8908 *tls_mask |= tls_set;
8909 *tls_mask &= ~tls_clear;
8910 }
8911
8912 if (elf_section_data (sec)->relocs != relstart)
8913 free (relstart);
8914 }
8915
8916 if (locsyms != NULL
8917 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8918 {
8919 if (!info->keep_memory)
8920 free (locsyms);
8921 else
8922 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8923 }
8924 }
8925
8926 if (toc_ref != NULL)
8927 free (toc_ref);
8928 return TRUE;
8929 }
8930
8931 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8932 the values of any global symbols in a toc section that has been
8933 edited. Globals in toc sections should be a rarity, so this function
8934 sets a flag if any are found in toc sections other than the one just
8935 edited, so that further hash table traversals can be avoided. */
8936
8937 struct adjust_toc_info
8938 {
8939 asection *toc;
8940 unsigned long *skip;
8941 bfd_boolean global_toc_syms;
8942 };
8943
8944 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8945
8946 static bfd_boolean
8947 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8948 {
8949 struct ppc_link_hash_entry *eh;
8950 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8951 unsigned long i;
8952
8953 if (h->root.type != bfd_link_hash_defined
8954 && h->root.type != bfd_link_hash_defweak)
8955 return TRUE;
8956
8957 eh = (struct ppc_link_hash_entry *) h;
8958 if (eh->adjust_done)
8959 return TRUE;
8960
8961 if (eh->elf.root.u.def.section == toc_inf->toc)
8962 {
8963 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8964 i = toc_inf->toc->rawsize >> 3;
8965 else
8966 i = eh->elf.root.u.def.value >> 3;
8967
8968 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8969 {
8970 _bfd_error_handler
8971 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8972 do
8973 ++i;
8974 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8975 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8976 }
8977
8978 eh->elf.root.u.def.value -= toc_inf->skip[i];
8979 eh->adjust_done = 1;
8980 }
8981 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8982 toc_inf->global_toc_syms = TRUE;
8983
8984 return TRUE;
8985 }
8986
8987 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8988 on a _LO variety toc/got reloc. */
8989
8990 static bfd_boolean
8991 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8992 {
8993 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8994 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8995 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8996 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8997 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8998 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8999 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
9000 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
9001 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
9002 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
9003 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
9004 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
9005 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
9006 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
9007 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
9008 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
9009 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
9010 /* Exclude lfqu by testing reloc. If relocs are ever
9011 defined for the reduced D field in psq_lu then those
9012 will need testing too. */
9013 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9014 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
9015 && (insn & 1) == 0)
9016 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
9017 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
9018 /* Exclude stfqu. psq_stu as above for psq_lu. */
9019 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9020 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
9021 && (insn & 1) == 0));
9022 }
9023
9024 /* Examine all relocs referencing .toc sections in order to remove
9025 unused .toc entries. */
9026
9027 bfd_boolean
9028 ppc64_elf_edit_toc (struct bfd_link_info *info)
9029 {
9030 bfd *ibfd;
9031 struct adjust_toc_info toc_inf;
9032 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9033
9034 htab->do_toc_opt = 1;
9035 toc_inf.global_toc_syms = TRUE;
9036 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9037 {
9038 asection *toc, *sec;
9039 Elf_Internal_Shdr *symtab_hdr;
9040 Elf_Internal_Sym *local_syms;
9041 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9042 unsigned long *skip, *drop;
9043 unsigned char *used;
9044 unsigned char *keep, last, some_unused;
9045
9046 if (!is_ppc64_elf (ibfd))
9047 continue;
9048
9049 toc = bfd_get_section_by_name (ibfd, ".toc");
9050 if (toc == NULL
9051 || toc->size == 0
9052 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9053 || discarded_section (toc))
9054 continue;
9055
9056 toc_relocs = NULL;
9057 local_syms = NULL;
9058 symtab_hdr = &elf_symtab_hdr (ibfd);
9059
9060 /* Look at sections dropped from the final link. */
9061 skip = NULL;
9062 relstart = NULL;
9063 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9064 {
9065 if (sec->reloc_count == 0
9066 || !discarded_section (sec)
9067 || get_opd_info (sec)
9068 || (sec->flags & SEC_ALLOC) == 0
9069 || (sec->flags & SEC_DEBUGGING) != 0)
9070 continue;
9071
9072 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9073 if (relstart == NULL)
9074 goto error_ret;
9075
9076 /* Run through the relocs to see which toc entries might be
9077 unused. */
9078 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9079 {
9080 enum elf_ppc64_reloc_type r_type;
9081 unsigned long r_symndx;
9082 asection *sym_sec;
9083 struct elf_link_hash_entry *h;
9084 Elf_Internal_Sym *sym;
9085 bfd_vma val;
9086
9087 r_type = ELF64_R_TYPE (rel->r_info);
9088 switch (r_type)
9089 {
9090 default:
9091 continue;
9092
9093 case R_PPC64_TOC16:
9094 case R_PPC64_TOC16_LO:
9095 case R_PPC64_TOC16_HI:
9096 case R_PPC64_TOC16_HA:
9097 case R_PPC64_TOC16_DS:
9098 case R_PPC64_TOC16_LO_DS:
9099 break;
9100 }
9101
9102 r_symndx = ELF64_R_SYM (rel->r_info);
9103 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9104 r_symndx, ibfd))
9105 goto error_ret;
9106
9107 if (sym_sec != toc)
9108 continue;
9109
9110 if (h != NULL)
9111 val = h->root.u.def.value;
9112 else
9113 val = sym->st_value;
9114 val += rel->r_addend;
9115
9116 if (val >= toc->size)
9117 continue;
9118
9119 /* Anything in the toc ought to be aligned to 8 bytes.
9120 If not, don't mark as unused. */
9121 if (val & 7)
9122 continue;
9123
9124 if (skip == NULL)
9125 {
9126 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9127 if (skip == NULL)
9128 goto error_ret;
9129 }
9130
9131 skip[val >> 3] = ref_from_discarded;
9132 }
9133
9134 if (elf_section_data (sec)->relocs != relstart)
9135 free (relstart);
9136 }
9137
9138 /* For largetoc loads of address constants, we can convert
9139 . addis rx,2,addr@got@ha
9140 . ld ry,addr@got@l(rx)
9141 to
9142 . addis rx,2,addr@toc@ha
9143 . addi ry,rx,addr@toc@l
9144 when addr is within 2G of the toc pointer. This then means
9145 that the word storing "addr" in the toc is no longer needed. */
9146
9147 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9148 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9149 && toc->reloc_count != 0)
9150 {
9151 /* Read toc relocs. */
9152 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9153 info->keep_memory);
9154 if (toc_relocs == NULL)
9155 goto error_ret;
9156
9157 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9158 {
9159 enum elf_ppc64_reloc_type r_type;
9160 unsigned long r_symndx;
9161 asection *sym_sec;
9162 struct elf_link_hash_entry *h;
9163 Elf_Internal_Sym *sym;
9164 bfd_vma val, addr;
9165
9166 r_type = ELF64_R_TYPE (rel->r_info);
9167 if (r_type != R_PPC64_ADDR64)
9168 continue;
9169
9170 r_symndx = ELF64_R_SYM (rel->r_info);
9171 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9172 r_symndx, ibfd))
9173 goto error_ret;
9174
9175 if (sym_sec == NULL
9176 || sym_sec->output_section == NULL
9177 || discarded_section (sym_sec))
9178 continue;
9179
9180 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9181 continue;
9182
9183 if (h != NULL)
9184 {
9185 if (h->type == STT_GNU_IFUNC)
9186 continue;
9187 val = h->root.u.def.value;
9188 }
9189 else
9190 {
9191 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9192 continue;
9193 val = sym->st_value;
9194 }
9195 val += rel->r_addend;
9196 val += sym_sec->output_section->vma + sym_sec->output_offset;
9197
9198 /* We don't yet know the exact toc pointer value, but we
9199 know it will be somewhere in the toc section. Don't
9200 optimize if the difference from any possible toc
9201 pointer is outside [ff..f80008000, 7fff7fff]. */
9202 addr = toc->output_section->vma + TOC_BASE_OFF;
9203 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9204 continue;
9205
9206 addr = toc->output_section->vma + toc->output_section->rawsize;
9207 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9208 continue;
9209
9210 if (skip == NULL)
9211 {
9212 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9213 if (skip == NULL)
9214 goto error_ret;
9215 }
9216
9217 skip[rel->r_offset >> 3]
9218 |= can_optimize | ((rel - toc_relocs) << 2);
9219 }
9220 }
9221
9222 if (skip == NULL)
9223 continue;
9224
9225 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9226 if (used == NULL)
9227 {
9228 error_ret:
9229 if (local_syms != NULL
9230 && symtab_hdr->contents != (unsigned char *) local_syms)
9231 free (local_syms);
9232 if (sec != NULL
9233 && relstart != NULL
9234 && elf_section_data (sec)->relocs != relstart)
9235 free (relstart);
9236 if (toc_relocs != NULL
9237 && elf_section_data (toc)->relocs != toc_relocs)
9238 free (toc_relocs);
9239 if (skip != NULL)
9240 free (skip);
9241 return FALSE;
9242 }
9243
9244 /* Now check all kept sections that might reference the toc.
9245 Check the toc itself last. */
9246 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9247 : ibfd->sections);
9248 sec != NULL;
9249 sec = (sec == toc ? NULL
9250 : sec->next == NULL ? toc
9251 : sec->next == toc && toc->next ? toc->next
9252 : sec->next))
9253 {
9254 int repeat;
9255
9256 if (sec->reloc_count == 0
9257 || discarded_section (sec)
9258 || get_opd_info (sec)
9259 || (sec->flags & SEC_ALLOC) == 0
9260 || (sec->flags & SEC_DEBUGGING) != 0)
9261 continue;
9262
9263 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9264 info->keep_memory);
9265 if (relstart == NULL)
9266 {
9267 free (used);
9268 goto error_ret;
9269 }
9270
9271 /* Mark toc entries referenced as used. */
9272 do
9273 {
9274 repeat = 0;
9275 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9276 {
9277 enum elf_ppc64_reloc_type r_type;
9278 unsigned long r_symndx;
9279 asection *sym_sec;
9280 struct elf_link_hash_entry *h;
9281 Elf_Internal_Sym *sym;
9282 bfd_vma val;
9283 enum {no_check, check_lo, check_ha} insn_check;
9284
9285 r_type = ELF64_R_TYPE (rel->r_info);
9286 switch (r_type)
9287 {
9288 default:
9289 insn_check = no_check;
9290 break;
9291
9292 case R_PPC64_GOT_TLSLD16_HA:
9293 case R_PPC64_GOT_TLSGD16_HA:
9294 case R_PPC64_GOT_TPREL16_HA:
9295 case R_PPC64_GOT_DTPREL16_HA:
9296 case R_PPC64_GOT16_HA:
9297 case R_PPC64_TOC16_HA:
9298 insn_check = check_ha;
9299 break;
9300
9301 case R_PPC64_GOT_TLSLD16_LO:
9302 case R_PPC64_GOT_TLSGD16_LO:
9303 case R_PPC64_GOT_TPREL16_LO_DS:
9304 case R_PPC64_GOT_DTPREL16_LO_DS:
9305 case R_PPC64_GOT16_LO:
9306 case R_PPC64_GOT16_LO_DS:
9307 case R_PPC64_TOC16_LO:
9308 case R_PPC64_TOC16_LO_DS:
9309 insn_check = check_lo;
9310 break;
9311 }
9312
9313 if (insn_check != no_check)
9314 {
9315 bfd_vma off = rel->r_offset & ~3;
9316 unsigned char buf[4];
9317 unsigned int insn;
9318
9319 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9320 {
9321 free (used);
9322 goto error_ret;
9323 }
9324 insn = bfd_get_32 (ibfd, buf);
9325 if (insn_check == check_lo
9326 ? !ok_lo_toc_insn (insn, r_type)
9327 : ((insn & ((0x3f << 26) | 0x1f << 16))
9328 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9329 {
9330 char str[12];
9331
9332 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9333 sprintf (str, "%#08x", insn);
9334 info->callbacks->einfo
9335 /* xgettext:c-format */
9336 (_("%H: toc optimization is not supported for"
9337 " %s instruction.\n"),
9338 ibfd, sec, rel->r_offset & ~3, str);
9339 }
9340 }
9341
9342 switch (r_type)
9343 {
9344 case R_PPC64_TOC16:
9345 case R_PPC64_TOC16_LO:
9346 case R_PPC64_TOC16_HI:
9347 case R_PPC64_TOC16_HA:
9348 case R_PPC64_TOC16_DS:
9349 case R_PPC64_TOC16_LO_DS:
9350 /* In case we're taking addresses of toc entries. */
9351 case R_PPC64_ADDR64:
9352 break;
9353
9354 default:
9355 continue;
9356 }
9357
9358 r_symndx = ELF64_R_SYM (rel->r_info);
9359 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9360 r_symndx, ibfd))
9361 {
9362 free (used);
9363 goto error_ret;
9364 }
9365
9366 if (sym_sec != toc)
9367 continue;
9368
9369 if (h != NULL)
9370 val = h->root.u.def.value;
9371 else
9372 val = sym->st_value;
9373 val += rel->r_addend;
9374
9375 if (val >= toc->size)
9376 continue;
9377
9378 if ((skip[val >> 3] & can_optimize) != 0)
9379 {
9380 bfd_vma off;
9381 unsigned char opc;
9382
9383 switch (r_type)
9384 {
9385 case R_PPC64_TOC16_HA:
9386 break;
9387
9388 case R_PPC64_TOC16_LO_DS:
9389 off = rel->r_offset;
9390 off += (bfd_big_endian (ibfd) ? -2 : 3);
9391 if (!bfd_get_section_contents (ibfd, sec, &opc,
9392 off, 1))
9393 {
9394 free (used);
9395 goto error_ret;
9396 }
9397 if ((opc & (0x3f << 2)) == (58u << 2))
9398 break;
9399 /* Fall through. */
9400
9401 default:
9402 /* Wrong sort of reloc, or not a ld. We may
9403 as well clear ref_from_discarded too. */
9404 skip[val >> 3] = 0;
9405 }
9406 }
9407
9408 if (sec != toc)
9409 used[val >> 3] = 1;
9410 /* For the toc section, we only mark as used if this
9411 entry itself isn't unused. */
9412 else if ((used[rel->r_offset >> 3]
9413 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9414 && !used[val >> 3])
9415 {
9416 /* Do all the relocs again, to catch reference
9417 chains. */
9418 repeat = 1;
9419 used[val >> 3] = 1;
9420 }
9421 }
9422 }
9423 while (repeat);
9424
9425 if (elf_section_data (sec)->relocs != relstart)
9426 free (relstart);
9427 }
9428
9429 /* Merge the used and skip arrays. Assume that TOC
9430 doublewords not appearing as either used or unused belong
9431 to an entry more than one doubleword in size. */
9432 for (drop = skip, keep = used, last = 0, some_unused = 0;
9433 drop < skip + (toc->size + 7) / 8;
9434 ++drop, ++keep)
9435 {
9436 if (*keep)
9437 {
9438 *drop &= ~ref_from_discarded;
9439 if ((*drop & can_optimize) != 0)
9440 some_unused = 1;
9441 last = 0;
9442 }
9443 else if ((*drop & ref_from_discarded) != 0)
9444 {
9445 some_unused = 1;
9446 last = ref_from_discarded;
9447 }
9448 else
9449 *drop = last;
9450 }
9451
9452 free (used);
9453
9454 if (some_unused)
9455 {
9456 bfd_byte *contents, *src;
9457 unsigned long off;
9458 Elf_Internal_Sym *sym;
9459 bfd_boolean local_toc_syms = FALSE;
9460
9461 /* Shuffle the toc contents, and at the same time convert the
9462 skip array from booleans into offsets. */
9463 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9464 goto error_ret;
9465
9466 elf_section_data (toc)->this_hdr.contents = contents;
9467
9468 for (src = contents, off = 0, drop = skip;
9469 src < contents + toc->size;
9470 src += 8, ++drop)
9471 {
9472 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9473 off += 8;
9474 else if (off != 0)
9475 {
9476 *drop = off;
9477 memcpy (src - off, src, 8);
9478 }
9479 }
9480 *drop = off;
9481 toc->rawsize = toc->size;
9482 toc->size = src - contents - off;
9483
9484 /* Adjust addends for relocs against the toc section sym,
9485 and optimize any accesses we can. */
9486 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9487 {
9488 if (sec->reloc_count == 0
9489 || discarded_section (sec))
9490 continue;
9491
9492 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9493 info->keep_memory);
9494 if (relstart == NULL)
9495 goto error_ret;
9496
9497 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9498 {
9499 enum elf_ppc64_reloc_type r_type;
9500 unsigned long r_symndx;
9501 asection *sym_sec;
9502 struct elf_link_hash_entry *h;
9503 bfd_vma val;
9504
9505 r_type = ELF64_R_TYPE (rel->r_info);
9506 switch (r_type)
9507 {
9508 default:
9509 continue;
9510
9511 case R_PPC64_TOC16:
9512 case R_PPC64_TOC16_LO:
9513 case R_PPC64_TOC16_HI:
9514 case R_PPC64_TOC16_HA:
9515 case R_PPC64_TOC16_DS:
9516 case R_PPC64_TOC16_LO_DS:
9517 case R_PPC64_ADDR64:
9518 break;
9519 }
9520
9521 r_symndx = ELF64_R_SYM (rel->r_info);
9522 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9523 r_symndx, ibfd))
9524 goto error_ret;
9525
9526 if (sym_sec != toc)
9527 continue;
9528
9529 if (h != NULL)
9530 val = h->root.u.def.value;
9531 else
9532 {
9533 val = sym->st_value;
9534 if (val != 0)
9535 local_toc_syms = TRUE;
9536 }
9537
9538 val += rel->r_addend;
9539
9540 if (val > toc->rawsize)
9541 val = toc->rawsize;
9542 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9543 continue;
9544 else if ((skip[val >> 3] & can_optimize) != 0)
9545 {
9546 Elf_Internal_Rela *tocrel
9547 = toc_relocs + (skip[val >> 3] >> 2);
9548 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9549
9550 switch (r_type)
9551 {
9552 case R_PPC64_TOC16_HA:
9553 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9554 break;
9555
9556 case R_PPC64_TOC16_LO_DS:
9557 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9558 break;
9559
9560 default:
9561 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9562 ppc_howto_init ();
9563 info->callbacks->einfo
9564 /* xgettext:c-format */
9565 (_("%H: %s references "
9566 "optimized away TOC entry\n"),
9567 ibfd, sec, rel->r_offset,
9568 ppc64_elf_howto_table[r_type]->name);
9569 bfd_set_error (bfd_error_bad_value);
9570 goto error_ret;
9571 }
9572 rel->r_addend = tocrel->r_addend;
9573 elf_section_data (sec)->relocs = relstart;
9574 continue;
9575 }
9576
9577 if (h != NULL || sym->st_value != 0)
9578 continue;
9579
9580 rel->r_addend -= skip[val >> 3];
9581 elf_section_data (sec)->relocs = relstart;
9582 }
9583
9584 if (elf_section_data (sec)->relocs != relstart)
9585 free (relstart);
9586 }
9587
9588 /* We shouldn't have local or global symbols defined in the TOC,
9589 but handle them anyway. */
9590 if (local_syms != NULL)
9591 for (sym = local_syms;
9592 sym < local_syms + symtab_hdr->sh_info;
9593 ++sym)
9594 if (sym->st_value != 0
9595 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9596 {
9597 unsigned long i;
9598
9599 if (sym->st_value > toc->rawsize)
9600 i = toc->rawsize >> 3;
9601 else
9602 i = sym->st_value >> 3;
9603
9604 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9605 {
9606 if (local_toc_syms)
9607 _bfd_error_handler
9608 (_("%s defined on removed toc entry"),
9609 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9610 do
9611 ++i;
9612 while ((skip[i] & (ref_from_discarded | can_optimize)));
9613 sym->st_value = (bfd_vma) i << 3;
9614 }
9615
9616 sym->st_value -= skip[i];
9617 symtab_hdr->contents = (unsigned char *) local_syms;
9618 }
9619
9620 /* Adjust any global syms defined in this toc input section. */
9621 if (toc_inf.global_toc_syms)
9622 {
9623 toc_inf.toc = toc;
9624 toc_inf.skip = skip;
9625 toc_inf.global_toc_syms = FALSE;
9626 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9627 &toc_inf);
9628 }
9629
9630 if (toc->reloc_count != 0)
9631 {
9632 Elf_Internal_Shdr *rel_hdr;
9633 Elf_Internal_Rela *wrel;
9634 bfd_size_type sz;
9635
9636 /* Remove unused toc relocs, and adjust those we keep. */
9637 if (toc_relocs == NULL)
9638 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9639 info->keep_memory);
9640 if (toc_relocs == NULL)
9641 goto error_ret;
9642
9643 wrel = toc_relocs;
9644 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9645 if ((skip[rel->r_offset >> 3]
9646 & (ref_from_discarded | can_optimize)) == 0)
9647 {
9648 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9649 wrel->r_info = rel->r_info;
9650 wrel->r_addend = rel->r_addend;
9651 ++wrel;
9652 }
9653 else if (!dec_dynrel_count (rel->r_info, toc, info,
9654 &local_syms, NULL, NULL))
9655 goto error_ret;
9656
9657 elf_section_data (toc)->relocs = toc_relocs;
9658 toc->reloc_count = wrel - toc_relocs;
9659 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9660 sz = rel_hdr->sh_entsize;
9661 rel_hdr->sh_size = toc->reloc_count * sz;
9662 }
9663 }
9664 else if (toc_relocs != NULL
9665 && elf_section_data (toc)->relocs != toc_relocs)
9666 free (toc_relocs);
9667
9668 if (local_syms != NULL
9669 && symtab_hdr->contents != (unsigned char *) local_syms)
9670 {
9671 if (!info->keep_memory)
9672 free (local_syms);
9673 else
9674 symtab_hdr->contents = (unsigned char *) local_syms;
9675 }
9676 free (skip);
9677 }
9678
9679 return TRUE;
9680 }
9681
9682 /* Return true iff input section I references the TOC using
9683 instructions limited to +/-32k offsets. */
9684
9685 bfd_boolean
9686 ppc64_elf_has_small_toc_reloc (asection *i)
9687 {
9688 return (is_ppc64_elf (i->owner)
9689 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9690 }
9691
9692 /* Allocate space for one GOT entry. */
9693
9694 static void
9695 allocate_got (struct elf_link_hash_entry *h,
9696 struct bfd_link_info *info,
9697 struct got_entry *gent)
9698 {
9699 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9700 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9701 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9702 ? 16 : 8);
9703 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9704 ? 2 : 1) * sizeof (Elf64_External_Rela);
9705 asection *got = ppc64_elf_tdata (gent->owner)->got;
9706
9707 gent->got.offset = got->size;
9708 got->size += entsize;
9709
9710 if (h->type == STT_GNU_IFUNC)
9711 {
9712 htab->elf.irelplt->size += rentsize;
9713 htab->got_reli_size += rentsize;
9714 }
9715 else if ((bfd_link_pic (info)
9716 || (htab->elf.dynamic_sections_created
9717 && h->dynindx != -1
9718 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9719 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9720 {
9721 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9722 relgot->size += rentsize;
9723 }
9724 }
9725
9726 /* This function merges got entries in the same toc group. */
9727
9728 static void
9729 merge_got_entries (struct got_entry **pent)
9730 {
9731 struct got_entry *ent, *ent2;
9732
9733 for (ent = *pent; ent != NULL; ent = ent->next)
9734 if (!ent->is_indirect)
9735 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9736 if (!ent2->is_indirect
9737 && ent2->addend == ent->addend
9738 && ent2->tls_type == ent->tls_type
9739 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9740 {
9741 ent2->is_indirect = TRUE;
9742 ent2->got.ent = ent;
9743 }
9744 }
9745
9746 /* If H is undefined weak, make it dynamic if that makes sense. */
9747
9748 static bfd_boolean
9749 ensure_undefweak_dynamic (struct bfd_link_info *info,
9750 struct elf_link_hash_entry *h)
9751 {
9752 struct elf_link_hash_table *htab = elf_hash_table (info);
9753
9754 if (htab->dynamic_sections_created
9755 && info->dynamic_undefined_weak != 0
9756 && h->root.type == bfd_link_hash_undefweak
9757 && h->dynindx == -1
9758 && !h->forced_local
9759 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9760 return bfd_elf_link_record_dynamic_symbol (info, h);
9761 return TRUE;
9762 }
9763
9764 /* Allocate space in .plt, .got and associated reloc sections for
9765 dynamic relocs. */
9766
9767 static bfd_boolean
9768 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9769 {
9770 struct bfd_link_info *info;
9771 struct ppc_link_hash_table *htab;
9772 asection *s;
9773 struct ppc_link_hash_entry *eh;
9774 struct got_entry **pgent, *gent;
9775
9776 if (h->root.type == bfd_link_hash_indirect)
9777 return TRUE;
9778
9779 info = (struct bfd_link_info *) inf;
9780 htab = ppc_hash_table (info);
9781 if (htab == NULL)
9782 return FALSE;
9783
9784 eh = (struct ppc_link_hash_entry *) h;
9785 /* Run through the TLS GD got entries first if we're changing them
9786 to TPREL. */
9787 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9788 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9789 if (gent->got.refcount > 0
9790 && (gent->tls_type & TLS_GD) != 0)
9791 {
9792 /* This was a GD entry that has been converted to TPREL. If
9793 there happens to be a TPREL entry we can use that one. */
9794 struct got_entry *ent;
9795 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9796 if (ent->got.refcount > 0
9797 && (ent->tls_type & TLS_TPREL) != 0
9798 && ent->addend == gent->addend
9799 && ent->owner == gent->owner)
9800 {
9801 gent->got.refcount = 0;
9802 break;
9803 }
9804
9805 /* If not, then we'll be using our own TPREL entry. */
9806 if (gent->got.refcount != 0)
9807 gent->tls_type = TLS_TLS | TLS_TPREL;
9808 }
9809
9810 /* Remove any list entry that won't generate a word in the GOT before
9811 we call merge_got_entries. Otherwise we risk merging to empty
9812 entries. */
9813 pgent = &h->got.glist;
9814 while ((gent = *pgent) != NULL)
9815 if (gent->got.refcount > 0)
9816 {
9817 if ((gent->tls_type & TLS_LD) != 0
9818 && !h->def_dynamic)
9819 {
9820 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9821 *pgent = gent->next;
9822 }
9823 else
9824 pgent = &gent->next;
9825 }
9826 else
9827 *pgent = gent->next;
9828
9829 if (!htab->do_multi_toc)
9830 merge_got_entries (&h->got.glist);
9831
9832 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9833 if (!gent->is_indirect)
9834 {
9835 /* Make sure this symbol is output as a dynamic symbol.
9836 Undefined weak syms won't yet be marked as dynamic. */
9837 if (!ensure_undefweak_dynamic (info, h))
9838 return FALSE;
9839
9840 if (!is_ppc64_elf (gent->owner))
9841 abort ();
9842
9843 allocate_got (h, info, gent);
9844 }
9845
9846 /* If no dynamic sections we can't have dynamic relocs, except for
9847 IFUNCs which are handled even in static executables. */
9848 if (!htab->elf.dynamic_sections_created
9849 && h->type != STT_GNU_IFUNC)
9850 eh->dyn_relocs = NULL;
9851
9852 /* Also discard relocs on undefined weak syms with non-default
9853 visibility, or when dynamic_undefined_weak says so. */
9854 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9855 eh->dyn_relocs = NULL;
9856
9857 if (eh->dyn_relocs != NULL)
9858 {
9859 struct elf_dyn_relocs *p, **pp;
9860
9861 /* In the shared -Bsymbolic case, discard space allocated for
9862 dynamic pc-relative relocs against symbols which turn out to
9863 be defined in regular objects. For the normal shared case,
9864 discard space for relocs that have become local due to symbol
9865 visibility changes. */
9866
9867 if (bfd_link_pic (info))
9868 {
9869 /* Relocs that use pc_count are those that appear on a call
9870 insn, or certain REL relocs (see must_be_dyn_reloc) that
9871 can be generated via assembly. We want calls to
9872 protected symbols to resolve directly to the function
9873 rather than going via the plt. If people want function
9874 pointer comparisons to work as expected then they should
9875 avoid writing weird assembly. */
9876 if (SYMBOL_CALLS_LOCAL (info, h))
9877 {
9878 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9879 {
9880 p->count -= p->pc_count;
9881 p->pc_count = 0;
9882 if (p->count == 0)
9883 *pp = p->next;
9884 else
9885 pp = &p->next;
9886 }
9887 }
9888
9889 if (eh->dyn_relocs != NULL)
9890 {
9891 /* Make sure this symbol is output as a dynamic symbol.
9892 Undefined weak syms won't yet be marked as dynamic. */
9893 if (!ensure_undefweak_dynamic (info, h))
9894 return FALSE;
9895 }
9896 }
9897 else if (h->type == STT_GNU_IFUNC)
9898 {
9899 /* A plt entry is always created when making direct calls to
9900 an ifunc, even when building a static executable, but
9901 that doesn't cover all cases. We may have only an ifunc
9902 initialised function pointer for a given ifunc symbol.
9903
9904 For ELFv2, dynamic relocations are not required when
9905 generating a global entry PLT stub. */
9906 if (abiversion (info->output_bfd) >= 2)
9907 {
9908 if (global_entry_stub (h))
9909 eh->dyn_relocs = NULL;
9910 }
9911
9912 /* For ELFv1 we have function descriptors. Descriptors need
9913 to be treated like PLT entries and thus have dynamic
9914 relocations. One exception is when the function
9915 descriptor is copied into .dynbss (which should only
9916 happen with ancient versions of gcc). */
9917 else if (h->needs_copy)
9918 eh->dyn_relocs = NULL;
9919 }
9920 else if (ELIMINATE_COPY_RELOCS)
9921 {
9922 /* For the non-pic case, discard space for relocs against
9923 symbols which turn out to need copy relocs or are not
9924 dynamic. */
9925 if (!h->non_got_ref
9926 && !h->def_regular)
9927 {
9928 /* Make sure this symbol is output as a dynamic symbol.
9929 Undefined weak syms won't yet be marked as dynamic. */
9930 if (!ensure_undefweak_dynamic (info, h))
9931 return FALSE;
9932
9933 if (h->dynindx == -1)
9934 eh->dyn_relocs = NULL;
9935 }
9936 else
9937 eh->dyn_relocs = NULL;
9938 }
9939
9940 /* Finally, allocate space. */
9941 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9942 {
9943 asection *sreloc = elf_section_data (p->sec)->sreloc;
9944 if (eh->elf.type == STT_GNU_IFUNC)
9945 sreloc = htab->elf.irelplt;
9946 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9947 }
9948 }
9949
9950 if ((htab->elf.dynamic_sections_created
9951 && h->dynindx != -1)
9952 || h->type == STT_GNU_IFUNC)
9953 {
9954 struct plt_entry *pent;
9955 bfd_boolean doneone = FALSE;
9956 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9957 if (pent->plt.refcount > 0)
9958 {
9959 if (!htab->elf.dynamic_sections_created
9960 || h->dynindx == -1)
9961 {
9962 s = htab->elf.iplt;
9963 pent->plt.offset = s->size;
9964 s->size += PLT_ENTRY_SIZE (htab);
9965 s = htab->elf.irelplt;
9966 }
9967 else
9968 {
9969 /* If this is the first .plt entry, make room for the special
9970 first entry. */
9971 s = htab->elf.splt;
9972 if (s->size == 0)
9973 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9974
9975 pent->plt.offset = s->size;
9976
9977 /* Make room for this entry. */
9978 s->size += PLT_ENTRY_SIZE (htab);
9979
9980 /* Make room for the .glink code. */
9981 s = htab->glink;
9982 if (s->size == 0)
9983 s->size += GLINK_CALL_STUB_SIZE;
9984 if (htab->opd_abi)
9985 {
9986 /* We need bigger stubs past index 32767. */
9987 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9988 s->size += 4;
9989 s->size += 2*4;
9990 }
9991 else
9992 s->size += 4;
9993
9994 /* We also need to make an entry in the .rela.plt section. */
9995 s = htab->elf.srelplt;
9996 }
9997 s->size += sizeof (Elf64_External_Rela);
9998 doneone = TRUE;
9999 }
10000 else
10001 pent->plt.offset = (bfd_vma) -1;
10002 if (!doneone)
10003 {
10004 h->plt.plist = NULL;
10005 h->needs_plt = 0;
10006 }
10007 }
10008 else
10009 {
10010 h->plt.plist = NULL;
10011 h->needs_plt = 0;
10012 }
10013
10014 return TRUE;
10015 }
10016
10017 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
10018 to set up space for global entry stubs. These are put in glink,
10019 after the branch table. */
10020
10021 static bfd_boolean
10022 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
10023 {
10024 struct bfd_link_info *info;
10025 struct ppc_link_hash_table *htab;
10026 struct plt_entry *pent;
10027 asection *s;
10028
10029 if (h->root.type == bfd_link_hash_indirect)
10030 return TRUE;
10031
10032 if (!h->pointer_equality_needed)
10033 return TRUE;
10034
10035 if (h->def_regular)
10036 return TRUE;
10037
10038 info = inf;
10039 htab = ppc_hash_table (info);
10040 if (htab == NULL)
10041 return FALSE;
10042
10043 s = htab->glink;
10044 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10045 if (pent->plt.offset != (bfd_vma) -1
10046 && pent->addend == 0)
10047 {
10048 /* For ELFv2, if this symbol is not defined in a regular file
10049 and we are not generating a shared library or pie, then we
10050 need to define the symbol in the executable on a call stub.
10051 This is to avoid text relocations. */
10052 s->size = (s->size + 15) & -16;
10053 h->root.type = bfd_link_hash_defined;
10054 h->root.u.def.section = s;
10055 h->root.u.def.value = s->size;
10056 s->size += 16;
10057 break;
10058 }
10059 return TRUE;
10060 }
10061
10062 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10063 read-only sections. */
10064
10065 static bfd_boolean
10066 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10067 {
10068 if (h->root.type == bfd_link_hash_indirect)
10069 return TRUE;
10070
10071 if (readonly_dynrelocs (h))
10072 {
10073 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10074
10075 /* Not an error, just cut short the traversal. */
10076 return FALSE;
10077 }
10078 return TRUE;
10079 }
10080
10081 /* Set the sizes of the dynamic sections. */
10082
10083 static bfd_boolean
10084 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10085 struct bfd_link_info *info)
10086 {
10087 struct ppc_link_hash_table *htab;
10088 bfd *dynobj;
10089 asection *s;
10090 bfd_boolean relocs;
10091 bfd *ibfd;
10092 struct got_entry *first_tlsld;
10093
10094 htab = ppc_hash_table (info);
10095 if (htab == NULL)
10096 return FALSE;
10097
10098 dynobj = htab->elf.dynobj;
10099 if (dynobj == NULL)
10100 abort ();
10101
10102 if (htab->elf.dynamic_sections_created)
10103 {
10104 /* Set the contents of the .interp section to the interpreter. */
10105 if (bfd_link_executable (info) && !info->nointerp)
10106 {
10107 s = bfd_get_linker_section (dynobj, ".interp");
10108 if (s == NULL)
10109 abort ();
10110 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10111 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10112 }
10113 }
10114
10115 /* Set up .got offsets for local syms, and space for local dynamic
10116 relocs. */
10117 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10118 {
10119 struct got_entry **lgot_ents;
10120 struct got_entry **end_lgot_ents;
10121 struct plt_entry **local_plt;
10122 struct plt_entry **end_local_plt;
10123 unsigned char *lgot_masks;
10124 bfd_size_type locsymcount;
10125 Elf_Internal_Shdr *symtab_hdr;
10126
10127 if (!is_ppc64_elf (ibfd))
10128 continue;
10129
10130 for (s = ibfd->sections; s != NULL; s = s->next)
10131 {
10132 struct ppc_dyn_relocs *p;
10133
10134 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10135 {
10136 if (!bfd_is_abs_section (p->sec)
10137 && bfd_is_abs_section (p->sec->output_section))
10138 {
10139 /* Input section has been discarded, either because
10140 it is a copy of a linkonce section or due to
10141 linker script /DISCARD/, so we'll be discarding
10142 the relocs too. */
10143 }
10144 else if (p->count != 0)
10145 {
10146 asection *srel = elf_section_data (p->sec)->sreloc;
10147 if (p->ifunc)
10148 srel = htab->elf.irelplt;
10149 srel->size += p->count * sizeof (Elf64_External_Rela);
10150 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10151 info->flags |= DF_TEXTREL;
10152 }
10153 }
10154 }
10155
10156 lgot_ents = elf_local_got_ents (ibfd);
10157 if (!lgot_ents)
10158 continue;
10159
10160 symtab_hdr = &elf_symtab_hdr (ibfd);
10161 locsymcount = symtab_hdr->sh_info;
10162 end_lgot_ents = lgot_ents + locsymcount;
10163 local_plt = (struct plt_entry **) end_lgot_ents;
10164 end_local_plt = local_plt + locsymcount;
10165 lgot_masks = (unsigned char *) end_local_plt;
10166 s = ppc64_elf_tdata (ibfd)->got;
10167 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10168 {
10169 struct got_entry **pent, *ent;
10170
10171 pent = lgot_ents;
10172 while ((ent = *pent) != NULL)
10173 if (ent->got.refcount > 0)
10174 {
10175 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10176 {
10177 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10178 *pent = ent->next;
10179 }
10180 else
10181 {
10182 unsigned int ent_size = 8;
10183 unsigned int rel_size = sizeof (Elf64_External_Rela);
10184
10185 ent->got.offset = s->size;
10186 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10187 {
10188 ent_size *= 2;
10189 rel_size *= 2;
10190 }
10191 s->size += ent_size;
10192 if ((*lgot_masks & PLT_IFUNC) != 0)
10193 {
10194 htab->elf.irelplt->size += rel_size;
10195 htab->got_reli_size += rel_size;
10196 }
10197 else if (bfd_link_pic (info))
10198 {
10199 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10200 srel->size += rel_size;
10201 }
10202 pent = &ent->next;
10203 }
10204 }
10205 else
10206 *pent = ent->next;
10207 }
10208
10209 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10210 for (; local_plt < end_local_plt; ++local_plt)
10211 {
10212 struct plt_entry *ent;
10213
10214 for (ent = *local_plt; ent != NULL; ent = ent->next)
10215 if (ent->plt.refcount > 0)
10216 {
10217 s = htab->elf.iplt;
10218 ent->plt.offset = s->size;
10219 s->size += PLT_ENTRY_SIZE (htab);
10220
10221 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10222 }
10223 else
10224 ent->plt.offset = (bfd_vma) -1;
10225 }
10226 }
10227
10228 /* Allocate global sym .plt and .got entries, and space for global
10229 sym dynamic relocs. */
10230 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10231 /* Stash the end of glink branch table. */
10232 if (htab->glink != NULL)
10233 htab->glink->rawsize = htab->glink->size;
10234
10235 if (!htab->opd_abi && !bfd_link_pic (info))
10236 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10237
10238 first_tlsld = NULL;
10239 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10240 {
10241 struct got_entry *ent;
10242
10243 if (!is_ppc64_elf (ibfd))
10244 continue;
10245
10246 ent = ppc64_tlsld_got (ibfd);
10247 if (ent->got.refcount > 0)
10248 {
10249 if (!htab->do_multi_toc && first_tlsld != NULL)
10250 {
10251 ent->is_indirect = TRUE;
10252 ent->got.ent = first_tlsld;
10253 }
10254 else
10255 {
10256 if (first_tlsld == NULL)
10257 first_tlsld = ent;
10258 s = ppc64_elf_tdata (ibfd)->got;
10259 ent->got.offset = s->size;
10260 ent->owner = ibfd;
10261 s->size += 16;
10262 if (bfd_link_pic (info))
10263 {
10264 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10265 srel->size += sizeof (Elf64_External_Rela);
10266 }
10267 }
10268 }
10269 else
10270 ent->got.offset = (bfd_vma) -1;
10271 }
10272
10273 /* We now have determined the sizes of the various dynamic sections.
10274 Allocate memory for them. */
10275 relocs = FALSE;
10276 for (s = dynobj->sections; s != NULL; s = s->next)
10277 {
10278 if ((s->flags & SEC_LINKER_CREATED) == 0)
10279 continue;
10280
10281 if (s == htab->brlt || s == htab->relbrlt)
10282 /* These haven't been allocated yet; don't strip. */
10283 continue;
10284 else if (s == htab->elf.sgot
10285 || s == htab->elf.splt
10286 || s == htab->elf.iplt
10287 || s == htab->glink
10288 || s == htab->elf.sdynbss
10289 || s == htab->elf.sdynrelro)
10290 {
10291 /* Strip this section if we don't need it; see the
10292 comment below. */
10293 }
10294 else if (s == htab->glink_eh_frame)
10295 {
10296 if (!bfd_is_abs_section (s->output_section))
10297 /* Not sized yet. */
10298 continue;
10299 }
10300 else if (CONST_STRNEQ (s->name, ".rela"))
10301 {
10302 if (s->size != 0)
10303 {
10304 if (s != htab->elf.srelplt)
10305 relocs = TRUE;
10306
10307 /* We use the reloc_count field as a counter if we need
10308 to copy relocs into the output file. */
10309 s->reloc_count = 0;
10310 }
10311 }
10312 else
10313 {
10314 /* It's not one of our sections, so don't allocate space. */
10315 continue;
10316 }
10317
10318 if (s->size == 0)
10319 {
10320 /* If we don't need this section, strip it from the
10321 output file. This is mostly to handle .rela.bss and
10322 .rela.plt. We must create both sections in
10323 create_dynamic_sections, because they must be created
10324 before the linker maps input sections to output
10325 sections. The linker does that before
10326 adjust_dynamic_symbol is called, and it is that
10327 function which decides whether anything needs to go
10328 into these sections. */
10329 s->flags |= SEC_EXCLUDE;
10330 continue;
10331 }
10332
10333 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10334 continue;
10335
10336 /* Allocate memory for the section contents. We use bfd_zalloc
10337 here in case unused entries are not reclaimed before the
10338 section's contents are written out. This should not happen,
10339 but this way if it does we get a R_PPC64_NONE reloc in .rela
10340 sections instead of garbage.
10341 We also rely on the section contents being zero when writing
10342 the GOT and .dynrelro. */
10343 s->contents = bfd_zalloc (dynobj, s->size);
10344 if (s->contents == NULL)
10345 return FALSE;
10346 }
10347
10348 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10349 {
10350 if (!is_ppc64_elf (ibfd))
10351 continue;
10352
10353 s = ppc64_elf_tdata (ibfd)->got;
10354 if (s != NULL && s != htab->elf.sgot)
10355 {
10356 if (s->size == 0)
10357 s->flags |= SEC_EXCLUDE;
10358 else
10359 {
10360 s->contents = bfd_zalloc (ibfd, s->size);
10361 if (s->contents == NULL)
10362 return FALSE;
10363 }
10364 }
10365 s = ppc64_elf_tdata (ibfd)->relgot;
10366 if (s != NULL)
10367 {
10368 if (s->size == 0)
10369 s->flags |= SEC_EXCLUDE;
10370 else
10371 {
10372 s->contents = bfd_zalloc (ibfd, s->size);
10373 if (s->contents == NULL)
10374 return FALSE;
10375 relocs = TRUE;
10376 s->reloc_count = 0;
10377 }
10378 }
10379 }
10380
10381 if (htab->elf.dynamic_sections_created)
10382 {
10383 bfd_boolean tls_opt;
10384
10385 /* Add some entries to the .dynamic section. We fill in the
10386 values later, in ppc64_elf_finish_dynamic_sections, but we
10387 must add the entries now so that we get the correct size for
10388 the .dynamic section. The DT_DEBUG entry is filled in by the
10389 dynamic linker and used by the debugger. */
10390 #define add_dynamic_entry(TAG, VAL) \
10391 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10392
10393 if (bfd_link_executable (info))
10394 {
10395 if (!add_dynamic_entry (DT_DEBUG, 0))
10396 return FALSE;
10397 }
10398
10399 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10400 {
10401 if (!add_dynamic_entry (DT_PLTGOT, 0)
10402 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10403 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10404 || !add_dynamic_entry (DT_JMPREL, 0)
10405 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10406 return FALSE;
10407 }
10408
10409 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10410 {
10411 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10412 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10413 return FALSE;
10414 }
10415
10416 tls_opt = (htab->params->tls_get_addr_opt
10417 && htab->tls_get_addr_fd != NULL
10418 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10419 if (tls_opt || !htab->opd_abi)
10420 {
10421 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10422 return FALSE;
10423 }
10424
10425 if (relocs)
10426 {
10427 if (!add_dynamic_entry (DT_RELA, 0)
10428 || !add_dynamic_entry (DT_RELASZ, 0)
10429 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10430 return FALSE;
10431
10432 /* If any dynamic relocs apply to a read-only section,
10433 then we need a DT_TEXTREL entry. */
10434 if ((info->flags & DF_TEXTREL) == 0)
10435 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10436
10437 if ((info->flags & DF_TEXTREL) != 0)
10438 {
10439 if (!add_dynamic_entry (DT_TEXTREL, 0))
10440 return FALSE;
10441 }
10442 }
10443 }
10444 #undef add_dynamic_entry
10445
10446 return TRUE;
10447 }
10448
10449 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10450
10451 static bfd_boolean
10452 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10453 {
10454 if (h->plt.plist != NULL
10455 && !h->def_regular
10456 && !h->pointer_equality_needed)
10457 return FALSE;
10458
10459 return _bfd_elf_hash_symbol (h);
10460 }
10461
10462 /* Determine the type of stub needed, if any, for a call. */
10463
10464 static inline enum ppc_stub_type
10465 ppc_type_of_stub (asection *input_sec,
10466 const Elf_Internal_Rela *rel,
10467 struct ppc_link_hash_entry **hash,
10468 struct plt_entry **plt_ent,
10469 bfd_vma destination,
10470 unsigned long local_off)
10471 {
10472 struct ppc_link_hash_entry *h = *hash;
10473 bfd_vma location;
10474 bfd_vma branch_offset;
10475 bfd_vma max_branch_offset;
10476 enum elf_ppc64_reloc_type r_type;
10477
10478 if (h != NULL)
10479 {
10480 struct plt_entry *ent;
10481 struct ppc_link_hash_entry *fdh = h;
10482 if (h->oh != NULL
10483 && h->oh->is_func_descriptor)
10484 {
10485 fdh = ppc_follow_link (h->oh);
10486 *hash = fdh;
10487 }
10488
10489 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10490 if (ent->addend == rel->r_addend
10491 && ent->plt.offset != (bfd_vma) -1)
10492 {
10493 *plt_ent = ent;
10494 return ppc_stub_plt_call;
10495 }
10496
10497 /* Here, we know we don't have a plt entry. If we don't have a
10498 either a defined function descriptor or a defined entry symbol
10499 in a regular object file, then it is pointless trying to make
10500 any other type of stub. */
10501 if (!is_static_defined (&fdh->elf)
10502 && !is_static_defined (&h->elf))
10503 return ppc_stub_none;
10504 }
10505 else if (elf_local_got_ents (input_sec->owner) != NULL)
10506 {
10507 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10508 struct plt_entry **local_plt = (struct plt_entry **)
10509 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10510 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10511
10512 if (local_plt[r_symndx] != NULL)
10513 {
10514 struct plt_entry *ent;
10515
10516 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10517 if (ent->addend == rel->r_addend
10518 && ent->plt.offset != (bfd_vma) -1)
10519 {
10520 *plt_ent = ent;
10521 return ppc_stub_plt_call;
10522 }
10523 }
10524 }
10525
10526 /* Determine where the call point is. */
10527 location = (input_sec->output_offset
10528 + input_sec->output_section->vma
10529 + rel->r_offset);
10530
10531 branch_offset = destination - location;
10532 r_type = ELF64_R_TYPE (rel->r_info);
10533
10534 /* Determine if a long branch stub is needed. */
10535 max_branch_offset = 1 << 25;
10536 if (r_type != R_PPC64_REL24)
10537 max_branch_offset = 1 << 15;
10538
10539 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10540 /* We need a stub. Figure out whether a long_branch or plt_branch
10541 is needed later. */
10542 return ppc_stub_long_branch;
10543
10544 return ppc_stub_none;
10545 }
10546
10547 /* With power7 weakly ordered memory model, it is possible for ld.so
10548 to update a plt entry in one thread and have another thread see a
10549 stale zero toc entry. To avoid this we need some sort of acquire
10550 barrier in the call stub. One solution is to make the load of the
10551 toc word seem to appear to depend on the load of the function entry
10552 word. Another solution is to test for r2 being zero, and branch to
10553 the appropriate glink entry if so.
10554
10555 . fake dep barrier compare
10556 . ld 12,xxx(2) ld 12,xxx(2)
10557 . mtctr 12 mtctr 12
10558 . xor 11,12,12 ld 2,xxx+8(2)
10559 . add 2,2,11 cmpldi 2,0
10560 . ld 2,xxx+8(2) bnectr+
10561 . bctr b <glink_entry>
10562
10563 The solution involving the compare turns out to be faster, so
10564 that's what we use unless the branch won't reach. */
10565
10566 #define ALWAYS_USE_FAKE_DEP 0
10567 #define ALWAYS_EMIT_R2SAVE 0
10568
10569 #define PPC_LO(v) ((v) & 0xffff)
10570 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10571 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10572
10573 static inline unsigned int
10574 plt_stub_size (struct ppc_link_hash_table *htab,
10575 struct ppc_stub_hash_entry *stub_entry,
10576 bfd_vma off)
10577 {
10578 unsigned size = 12;
10579
10580 if (ALWAYS_EMIT_R2SAVE
10581 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10582 size += 4;
10583 if (PPC_HA (off) != 0)
10584 size += 4;
10585 if (htab->opd_abi)
10586 {
10587 size += 4;
10588 if (htab->params->plt_static_chain)
10589 size += 4;
10590 if (htab->params->plt_thread_safe
10591 && htab->elf.dynamic_sections_created
10592 && stub_entry->h != NULL
10593 && stub_entry->h->elf.dynindx != -1)
10594 size += 8;
10595 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10596 size += 4;
10597 }
10598 if (stub_entry->h != NULL
10599 && (stub_entry->h == htab->tls_get_addr_fd
10600 || stub_entry->h == htab->tls_get_addr)
10601 && htab->params->tls_get_addr_opt)
10602 {
10603 size += 7 * 4;
10604 if (ALWAYS_EMIT_R2SAVE
10605 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10606 size += 6 * 4;
10607 }
10608 return size;
10609 }
10610
10611 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10612 then return the padding needed to do so. */
10613 static inline unsigned int
10614 plt_stub_pad (struct ppc_link_hash_table *htab,
10615 struct ppc_stub_hash_entry *stub_entry,
10616 bfd_vma plt_off)
10617 {
10618 int stub_align = 1 << htab->params->plt_stub_align;
10619 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10620 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10621
10622 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10623 > ((stub_size - 1) & -stub_align))
10624 return stub_align - (stub_off & (stub_align - 1));
10625 return 0;
10626 }
10627
10628 /* Build a .plt call stub. */
10629
10630 static inline bfd_byte *
10631 build_plt_stub (struct ppc_link_hash_table *htab,
10632 struct ppc_stub_hash_entry *stub_entry,
10633 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10634 {
10635 bfd *obfd = htab->params->stub_bfd;
10636 bfd_boolean plt_load_toc = htab->opd_abi;
10637 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10638 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10639 && htab->elf.dynamic_sections_created
10640 && stub_entry->h != NULL
10641 && stub_entry->h->elf.dynindx != -1);
10642 bfd_boolean use_fake_dep = plt_thread_safe;
10643 bfd_vma cmp_branch_off = 0;
10644
10645 if (!ALWAYS_USE_FAKE_DEP
10646 && plt_load_toc
10647 && plt_thread_safe
10648 && !((stub_entry->h == htab->tls_get_addr_fd
10649 || stub_entry->h == htab->tls_get_addr)
10650 && htab->params->tls_get_addr_opt))
10651 {
10652 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10653 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10654 / PLT_ENTRY_SIZE (htab));
10655 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10656 bfd_vma to, from;
10657
10658 if (pltindex > 32768)
10659 glinkoff += (pltindex - 32768) * 4;
10660 to = (glinkoff
10661 + htab->glink->output_offset
10662 + htab->glink->output_section->vma);
10663 from = (p - stub_entry->group->stub_sec->contents
10664 + 4 * (ALWAYS_EMIT_R2SAVE
10665 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10666 + 4 * (PPC_HA (offset) != 0)
10667 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10668 != PPC_HA (offset))
10669 + 4 * (plt_static_chain != 0)
10670 + 20
10671 + stub_entry->group->stub_sec->output_offset
10672 + stub_entry->group->stub_sec->output_section->vma);
10673 cmp_branch_off = to - from;
10674 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10675 }
10676
10677 if (PPC_HA (offset) != 0)
10678 {
10679 if (r != NULL)
10680 {
10681 if (ALWAYS_EMIT_R2SAVE
10682 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10683 r[0].r_offset += 4;
10684 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10685 r[1].r_offset = r[0].r_offset + 4;
10686 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10687 r[1].r_addend = r[0].r_addend;
10688 if (plt_load_toc)
10689 {
10690 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10691 {
10692 r[2].r_offset = r[1].r_offset + 4;
10693 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10694 r[2].r_addend = r[0].r_addend;
10695 }
10696 else
10697 {
10698 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10699 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10700 r[2].r_addend = r[0].r_addend + 8;
10701 if (plt_static_chain)
10702 {
10703 r[3].r_offset = r[2].r_offset + 4;
10704 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10705 r[3].r_addend = r[0].r_addend + 16;
10706 }
10707 }
10708 }
10709 }
10710 if (ALWAYS_EMIT_R2SAVE
10711 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10712 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10713 if (plt_load_toc)
10714 {
10715 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10716 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10717 }
10718 else
10719 {
10720 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10721 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10722 }
10723 if (plt_load_toc
10724 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10725 {
10726 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10727 offset = 0;
10728 }
10729 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10730 if (plt_load_toc)
10731 {
10732 if (use_fake_dep)
10733 {
10734 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10735 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10736 }
10737 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10738 if (plt_static_chain)
10739 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10740 }
10741 }
10742 else
10743 {
10744 if (r != NULL)
10745 {
10746 if (ALWAYS_EMIT_R2SAVE
10747 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10748 r[0].r_offset += 4;
10749 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10750 if (plt_load_toc)
10751 {
10752 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10753 {
10754 r[1].r_offset = r[0].r_offset + 4;
10755 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10756 r[1].r_addend = r[0].r_addend;
10757 }
10758 else
10759 {
10760 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10761 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10762 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10763 if (plt_static_chain)
10764 {
10765 r[2].r_offset = r[1].r_offset + 4;
10766 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10767 r[2].r_addend = r[0].r_addend + 8;
10768 }
10769 }
10770 }
10771 }
10772 if (ALWAYS_EMIT_R2SAVE
10773 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10774 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10775 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10776 if (plt_load_toc
10777 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10778 {
10779 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10780 offset = 0;
10781 }
10782 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10783 if (plt_load_toc)
10784 {
10785 if (use_fake_dep)
10786 {
10787 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10788 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10789 }
10790 if (plt_static_chain)
10791 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10792 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10793 }
10794 }
10795 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10796 {
10797 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10798 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10799 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10800 }
10801 else
10802 bfd_put_32 (obfd, BCTR, p), p += 4;
10803 return p;
10804 }
10805
10806 /* Build a special .plt call stub for __tls_get_addr. */
10807
10808 #define LD_R11_0R3 0xe9630000
10809 #define LD_R12_0R3 0xe9830000
10810 #define MR_R0_R3 0x7c601b78
10811 #define CMPDI_R11_0 0x2c2b0000
10812 #define ADD_R3_R12_R13 0x7c6c6a14
10813 #define BEQLR 0x4d820020
10814 #define MR_R3_R0 0x7c030378
10815 #define STD_R11_0R1 0xf9610000
10816 #define BCTRL 0x4e800421
10817 #define LD_R11_0R1 0xe9610000
10818 #define MTLR_R11 0x7d6803a6
10819
10820 static inline bfd_byte *
10821 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10822 struct ppc_stub_hash_entry *stub_entry,
10823 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10824 {
10825 bfd *obfd = htab->params->stub_bfd;
10826
10827 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10828 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10829 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10830 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10831 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10832 bfd_put_32 (obfd, BEQLR, p), p += 4;
10833 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10834 if (r != NULL)
10835 r[0].r_offset += 7 * 4;
10836 if (!ALWAYS_EMIT_R2SAVE
10837 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10838 return build_plt_stub (htab, stub_entry, p, offset, r);
10839
10840 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10841 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10842
10843 if (r != NULL)
10844 r[0].r_offset += 2 * 4;
10845 p = build_plt_stub (htab, stub_entry, p, offset, r);
10846 bfd_put_32 (obfd, BCTRL, p - 4);
10847
10848 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10849 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10850 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10851 bfd_put_32 (obfd, BLR, p), p += 4;
10852
10853 return p;
10854 }
10855
10856 static Elf_Internal_Rela *
10857 get_relocs (asection *sec, int count)
10858 {
10859 Elf_Internal_Rela *relocs;
10860 struct bfd_elf_section_data *elfsec_data;
10861
10862 elfsec_data = elf_section_data (sec);
10863 relocs = elfsec_data->relocs;
10864 if (relocs == NULL)
10865 {
10866 bfd_size_type relsize;
10867 relsize = sec->reloc_count * sizeof (*relocs);
10868 relocs = bfd_alloc (sec->owner, relsize);
10869 if (relocs == NULL)
10870 return NULL;
10871 elfsec_data->relocs = relocs;
10872 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10873 sizeof (Elf_Internal_Shdr));
10874 if (elfsec_data->rela.hdr == NULL)
10875 return NULL;
10876 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10877 * sizeof (Elf64_External_Rela));
10878 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10879 sec->reloc_count = 0;
10880 }
10881 relocs += sec->reloc_count;
10882 sec->reloc_count += count;
10883 return relocs;
10884 }
10885
10886 static bfd_vma
10887 get_r2off (struct bfd_link_info *info,
10888 struct ppc_stub_hash_entry *stub_entry)
10889 {
10890 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10891 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10892
10893 if (r2off == 0)
10894 {
10895 /* Support linking -R objects. Get the toc pointer from the
10896 opd entry. */
10897 char buf[8];
10898 if (!htab->opd_abi)
10899 return r2off;
10900 asection *opd = stub_entry->h->elf.root.u.def.section;
10901 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10902
10903 if (strcmp (opd->name, ".opd") != 0
10904 || opd->reloc_count != 0)
10905 {
10906 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10907 stub_entry->h->elf.root.root.string);
10908 bfd_set_error (bfd_error_bad_value);
10909 return (bfd_vma) -1;
10910 }
10911 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10912 return (bfd_vma) -1;
10913 r2off = bfd_get_64 (opd->owner, buf);
10914 r2off -= elf_gp (info->output_bfd);
10915 }
10916 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10917 return r2off;
10918 }
10919
10920 static bfd_boolean
10921 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10922 {
10923 struct ppc_stub_hash_entry *stub_entry;
10924 struct ppc_branch_hash_entry *br_entry;
10925 struct bfd_link_info *info;
10926 struct ppc_link_hash_table *htab;
10927 bfd_byte *loc;
10928 bfd_byte *p;
10929 bfd_vma dest, off;
10930 int size;
10931 Elf_Internal_Rela *r;
10932 asection *plt;
10933
10934 /* Massage our args to the form they really have. */
10935 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10936 info = in_arg;
10937
10938 htab = ppc_hash_table (info);
10939 if (htab == NULL)
10940 return FALSE;
10941
10942 /* Make a note of the offset within the stubs for this entry. */
10943 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10944 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10945
10946 htab->stub_count[stub_entry->stub_type - 1] += 1;
10947 switch (stub_entry->stub_type)
10948 {
10949 case ppc_stub_long_branch:
10950 case ppc_stub_long_branch_r2off:
10951 /* Branches are relative. This is where we are going to. */
10952 dest = (stub_entry->target_value
10953 + stub_entry->target_section->output_offset
10954 + stub_entry->target_section->output_section->vma);
10955 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10956 off = dest;
10957
10958 /* And this is where we are coming from. */
10959 off -= (stub_entry->stub_offset
10960 + stub_entry->group->stub_sec->output_offset
10961 + stub_entry->group->stub_sec->output_section->vma);
10962
10963 size = 4;
10964 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10965 {
10966 bfd_vma r2off = get_r2off (info, stub_entry);
10967
10968 if (r2off == (bfd_vma) -1)
10969 {
10970 htab->stub_error = TRUE;
10971 return FALSE;
10972 }
10973 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10974 loc += 4;
10975 size = 8;
10976 if (PPC_HA (r2off) != 0)
10977 {
10978 bfd_put_32 (htab->params->stub_bfd,
10979 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10980 loc += 4;
10981 size += 4;
10982 }
10983 if (PPC_LO (r2off) != 0)
10984 {
10985 bfd_put_32 (htab->params->stub_bfd,
10986 ADDI_R2_R2 | PPC_LO (r2off), loc);
10987 loc += 4;
10988 size += 4;
10989 }
10990 off -= size - 4;
10991 }
10992 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10993
10994 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10995 {
10996 info->callbacks->einfo
10997 (_("%P: long branch stub `%s' offset overflow\n"),
10998 stub_entry->root.string);
10999 htab->stub_error = TRUE;
11000 return FALSE;
11001 }
11002
11003 if (info->emitrelocations)
11004 {
11005 r = get_relocs (stub_entry->group->stub_sec, 1);
11006 if (r == NULL)
11007 return FALSE;
11008 r->r_offset = loc - stub_entry->group->stub_sec->contents;
11009 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
11010 r->r_addend = dest;
11011 if (stub_entry->h != NULL)
11012 {
11013 struct elf_link_hash_entry **hashes;
11014 unsigned long symndx;
11015 struct ppc_link_hash_entry *h;
11016
11017 hashes = elf_sym_hashes (htab->params->stub_bfd);
11018 if (hashes == NULL)
11019 {
11020 bfd_size_type hsize;
11021
11022 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
11023 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
11024 if (hashes == NULL)
11025 return FALSE;
11026 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11027 htab->stub_globals = 1;
11028 }
11029 symndx = htab->stub_globals++;
11030 h = stub_entry->h;
11031 hashes[symndx] = &h->elf;
11032 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11033 if (h->oh != NULL && h->oh->is_func)
11034 h = ppc_follow_link (h->oh);
11035 if (h->elf.root.u.def.section != stub_entry->target_section)
11036 /* H is an opd symbol. The addend must be zero. */
11037 r->r_addend = 0;
11038 else
11039 {
11040 off = (h->elf.root.u.def.value
11041 + h->elf.root.u.def.section->output_offset
11042 + h->elf.root.u.def.section->output_section->vma);
11043 r->r_addend -= off;
11044 }
11045 }
11046 }
11047 break;
11048
11049 case ppc_stub_plt_branch:
11050 case ppc_stub_plt_branch_r2off:
11051 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11052 stub_entry->root.string + 9,
11053 FALSE, FALSE);
11054 if (br_entry == NULL)
11055 {
11056 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
11057 stub_entry->root.string);
11058 htab->stub_error = TRUE;
11059 return FALSE;
11060 }
11061
11062 dest = (stub_entry->target_value
11063 + stub_entry->target_section->output_offset
11064 + stub_entry->target_section->output_section->vma);
11065 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11066 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11067
11068 bfd_put_64 (htab->brlt->owner, dest,
11069 htab->brlt->contents + br_entry->offset);
11070
11071 if (br_entry->iter == htab->stub_iteration)
11072 {
11073 br_entry->iter = 0;
11074
11075 if (htab->relbrlt != NULL)
11076 {
11077 /* Create a reloc for the branch lookup table entry. */
11078 Elf_Internal_Rela rela;
11079 bfd_byte *rl;
11080
11081 rela.r_offset = (br_entry->offset
11082 + htab->brlt->output_offset
11083 + htab->brlt->output_section->vma);
11084 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11085 rela.r_addend = dest;
11086
11087 rl = htab->relbrlt->contents;
11088 rl += (htab->relbrlt->reloc_count++
11089 * sizeof (Elf64_External_Rela));
11090 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11091 }
11092 else if (info->emitrelocations)
11093 {
11094 r = get_relocs (htab->brlt, 1);
11095 if (r == NULL)
11096 return FALSE;
11097 /* brlt, being SEC_LINKER_CREATED does not go through the
11098 normal reloc processing. Symbols and offsets are not
11099 translated from input file to output file form, so
11100 set up the offset per the output file. */
11101 r->r_offset = (br_entry->offset
11102 + htab->brlt->output_offset
11103 + htab->brlt->output_section->vma);
11104 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11105 r->r_addend = dest;
11106 }
11107 }
11108
11109 dest = (br_entry->offset
11110 + htab->brlt->output_offset
11111 + htab->brlt->output_section->vma);
11112
11113 off = (dest
11114 - elf_gp (htab->brlt->output_section->owner)
11115 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11116
11117 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11118 {
11119 info->callbacks->einfo
11120 (_("%P: linkage table error against `%T'\n"),
11121 stub_entry->root.string);
11122 bfd_set_error (bfd_error_bad_value);
11123 htab->stub_error = TRUE;
11124 return FALSE;
11125 }
11126
11127 if (info->emitrelocations)
11128 {
11129 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11130 if (r == NULL)
11131 return FALSE;
11132 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11133 if (bfd_big_endian (info->output_bfd))
11134 r[0].r_offset += 2;
11135 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11136 r[0].r_offset += 4;
11137 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11138 r[0].r_addend = dest;
11139 if (PPC_HA (off) != 0)
11140 {
11141 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11142 r[1].r_offset = r[0].r_offset + 4;
11143 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11144 r[1].r_addend = r[0].r_addend;
11145 }
11146 }
11147
11148 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11149 {
11150 if (PPC_HA (off) != 0)
11151 {
11152 size = 16;
11153 bfd_put_32 (htab->params->stub_bfd,
11154 ADDIS_R12_R2 | PPC_HA (off), loc);
11155 loc += 4;
11156 bfd_put_32 (htab->params->stub_bfd,
11157 LD_R12_0R12 | PPC_LO (off), loc);
11158 }
11159 else
11160 {
11161 size = 12;
11162 bfd_put_32 (htab->params->stub_bfd,
11163 LD_R12_0R2 | PPC_LO (off), loc);
11164 }
11165 }
11166 else
11167 {
11168 bfd_vma r2off = get_r2off (info, stub_entry);
11169
11170 if (r2off == (bfd_vma) -1)
11171 {
11172 htab->stub_error = TRUE;
11173 return FALSE;
11174 }
11175
11176 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11177 loc += 4;
11178 size = 16;
11179 if (PPC_HA (off) != 0)
11180 {
11181 size += 4;
11182 bfd_put_32 (htab->params->stub_bfd,
11183 ADDIS_R12_R2 | PPC_HA (off), loc);
11184 loc += 4;
11185 bfd_put_32 (htab->params->stub_bfd,
11186 LD_R12_0R12 | PPC_LO (off), loc);
11187 }
11188 else
11189 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11190
11191 if (PPC_HA (r2off) != 0)
11192 {
11193 size += 4;
11194 loc += 4;
11195 bfd_put_32 (htab->params->stub_bfd,
11196 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11197 }
11198 if (PPC_LO (r2off) != 0)
11199 {
11200 size += 4;
11201 loc += 4;
11202 bfd_put_32 (htab->params->stub_bfd,
11203 ADDI_R2_R2 | PPC_LO (r2off), loc);
11204 }
11205 }
11206 loc += 4;
11207 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11208 loc += 4;
11209 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11210 break;
11211
11212 case ppc_stub_plt_call:
11213 case ppc_stub_plt_call_r2save:
11214 if (stub_entry->h != NULL
11215 && stub_entry->h->is_func_descriptor
11216 && stub_entry->h->oh != NULL)
11217 {
11218 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11219
11220 /* If the old-ABI "dot-symbol" is undefined make it weak so
11221 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11222 if (fh->elf.root.type == bfd_link_hash_undefined
11223 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11224 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11225 fh->elf.root.type = bfd_link_hash_undefweak;
11226 }
11227
11228 /* Now build the stub. */
11229 dest = stub_entry->plt_ent->plt.offset & ~1;
11230 if (dest >= (bfd_vma) -2)
11231 abort ();
11232
11233 plt = htab->elf.splt;
11234 if (!htab->elf.dynamic_sections_created
11235 || stub_entry->h == NULL
11236 || stub_entry->h->elf.dynindx == -1)
11237 plt = htab->elf.iplt;
11238
11239 dest += plt->output_offset + plt->output_section->vma;
11240
11241 if (stub_entry->h == NULL
11242 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11243 {
11244 Elf_Internal_Rela rela;
11245 bfd_byte *rl;
11246
11247 rela.r_offset = dest;
11248 if (htab->opd_abi)
11249 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11250 else
11251 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11252 rela.r_addend = (stub_entry->target_value
11253 + stub_entry->target_section->output_offset
11254 + stub_entry->target_section->output_section->vma);
11255
11256 rl = (htab->elf.irelplt->contents
11257 + (htab->elf.irelplt->reloc_count++
11258 * sizeof (Elf64_External_Rela)));
11259 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11260 stub_entry->plt_ent->plt.offset |= 1;
11261 htab->local_ifunc_resolver = 1;
11262 }
11263
11264 off = (dest
11265 - elf_gp (plt->output_section->owner)
11266 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11267
11268 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11269 {
11270 info->callbacks->einfo
11271 /* xgettext:c-format */
11272 (_("%P: linkage table error against `%T'\n"),
11273 stub_entry->h != NULL
11274 ? stub_entry->h->elf.root.root.string
11275 : "<local sym>");
11276 bfd_set_error (bfd_error_bad_value);
11277 htab->stub_error = TRUE;
11278 return FALSE;
11279 }
11280
11281 if (htab->params->plt_stub_align != 0)
11282 {
11283 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11284
11285 stub_entry->group->stub_sec->size += pad;
11286 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11287 loc += pad;
11288 }
11289
11290 r = NULL;
11291 if (info->emitrelocations)
11292 {
11293 r = get_relocs (stub_entry->group->stub_sec,
11294 ((PPC_HA (off) != 0)
11295 + (htab->opd_abi
11296 ? 2 + (htab->params->plt_static_chain
11297 && PPC_HA (off + 16) == PPC_HA (off))
11298 : 1)));
11299 if (r == NULL)
11300 return FALSE;
11301 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11302 if (bfd_big_endian (info->output_bfd))
11303 r[0].r_offset += 2;
11304 r[0].r_addend = dest;
11305 }
11306 if (stub_entry->h != NULL
11307 && (stub_entry->h == htab->tls_get_addr_fd
11308 || stub_entry->h == htab->tls_get_addr)
11309 && htab->params->tls_get_addr_opt)
11310 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11311 else
11312 p = build_plt_stub (htab, stub_entry, loc, off, r);
11313 size = p - loc;
11314 break;
11315
11316 case ppc_stub_save_res:
11317 return TRUE;
11318
11319 default:
11320 BFD_FAIL ();
11321 return FALSE;
11322 }
11323
11324 stub_entry->group->stub_sec->size += size;
11325
11326 if (htab->params->emit_stub_syms)
11327 {
11328 struct elf_link_hash_entry *h;
11329 size_t len1, len2;
11330 char *name;
11331 const char *const stub_str[] = { "long_branch",
11332 "long_branch_r2off",
11333 "plt_branch",
11334 "plt_branch_r2off",
11335 "plt_call",
11336 "plt_call" };
11337
11338 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11339 len2 = strlen (stub_entry->root.string);
11340 name = bfd_malloc (len1 + len2 + 2);
11341 if (name == NULL)
11342 return FALSE;
11343 memcpy (name, stub_entry->root.string, 9);
11344 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11345 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11346 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11347 if (h == NULL)
11348 return FALSE;
11349 if (h->root.type == bfd_link_hash_new)
11350 {
11351 h->root.type = bfd_link_hash_defined;
11352 h->root.u.def.section = stub_entry->group->stub_sec;
11353 h->root.u.def.value = stub_entry->stub_offset;
11354 h->ref_regular = 1;
11355 h->def_regular = 1;
11356 h->ref_regular_nonweak = 1;
11357 h->forced_local = 1;
11358 h->non_elf = 0;
11359 h->root.linker_def = 1;
11360 }
11361 }
11362
11363 return TRUE;
11364 }
11365
11366 /* As above, but don't actually build the stub. Just bump offset so
11367 we know stub section sizes, and select plt_branch stubs where
11368 long_branch stubs won't do. */
11369
11370 static bfd_boolean
11371 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11372 {
11373 struct ppc_stub_hash_entry *stub_entry;
11374 struct bfd_link_info *info;
11375 struct ppc_link_hash_table *htab;
11376 bfd_vma off;
11377 int size;
11378
11379 /* Massage our args to the form they really have. */
11380 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11381 info = in_arg;
11382
11383 htab = ppc_hash_table (info);
11384 if (htab == NULL)
11385 return FALSE;
11386
11387 if (stub_entry->h != NULL
11388 && stub_entry->h->save_res
11389 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11390 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11391 {
11392 /* Don't make stubs to out-of-line register save/restore
11393 functions. Instead, emit copies of the functions. */
11394 stub_entry->group->needs_save_res = 1;
11395 stub_entry->stub_type = ppc_stub_save_res;
11396 return TRUE;
11397 }
11398
11399 if (stub_entry->stub_type == ppc_stub_plt_call
11400 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11401 {
11402 asection *plt;
11403 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11404 if (off >= (bfd_vma) -2)
11405 abort ();
11406 plt = htab->elf.splt;
11407 if (!htab->elf.dynamic_sections_created
11408 || stub_entry->h == NULL
11409 || stub_entry->h->elf.dynindx == -1)
11410 plt = htab->elf.iplt;
11411 off += (plt->output_offset
11412 + plt->output_section->vma
11413 - elf_gp (plt->output_section->owner)
11414 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11415
11416 size = plt_stub_size (htab, stub_entry, off);
11417 if (stub_entry->h != NULL
11418 && (stub_entry->h == htab->tls_get_addr_fd
11419 || stub_entry->h == htab->tls_get_addr)
11420 && htab->params->tls_get_addr_opt
11421 && (ALWAYS_EMIT_R2SAVE
11422 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11423 stub_entry->group->tls_get_addr_opt_bctrl
11424 = stub_entry->group->stub_sec->size + size - 5 * 4;
11425
11426 if (htab->params->plt_stub_align)
11427 size += plt_stub_pad (htab, stub_entry, off);
11428 if (info->emitrelocations)
11429 {
11430 stub_entry->group->stub_sec->reloc_count
11431 += ((PPC_HA (off) != 0)
11432 + (htab->opd_abi
11433 ? 2 + (htab->params->plt_static_chain
11434 && PPC_HA (off + 16) == PPC_HA (off))
11435 : 1));
11436 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11437 }
11438 }
11439 else
11440 {
11441 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11442 variants. */
11443 bfd_vma r2off = 0;
11444 bfd_vma local_off = 0;
11445
11446 off = (stub_entry->target_value
11447 + stub_entry->target_section->output_offset
11448 + stub_entry->target_section->output_section->vma);
11449 off -= (stub_entry->group->stub_sec->size
11450 + stub_entry->group->stub_sec->output_offset
11451 + stub_entry->group->stub_sec->output_section->vma);
11452
11453 /* Reset the stub type from the plt variant in case we now
11454 can reach with a shorter stub. */
11455 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11456 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11457
11458 size = 4;
11459 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11460 {
11461 r2off = get_r2off (info, stub_entry);
11462 if (r2off == (bfd_vma) -1)
11463 {
11464 htab->stub_error = TRUE;
11465 return FALSE;
11466 }
11467 size = 8;
11468 if (PPC_HA (r2off) != 0)
11469 size += 4;
11470 if (PPC_LO (r2off) != 0)
11471 size += 4;
11472 off -= size - 4;
11473 }
11474
11475 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11476
11477 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11478 Do the same for -R objects without function descriptors. */
11479 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11480 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11481 && r2off == 0
11482 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11483 {
11484 struct ppc_branch_hash_entry *br_entry;
11485
11486 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11487 stub_entry->root.string + 9,
11488 TRUE, FALSE);
11489 if (br_entry == NULL)
11490 {
11491 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11492 stub_entry->root.string);
11493 htab->stub_error = TRUE;
11494 return FALSE;
11495 }
11496
11497 if (br_entry->iter != htab->stub_iteration)
11498 {
11499 br_entry->iter = htab->stub_iteration;
11500 br_entry->offset = htab->brlt->size;
11501 htab->brlt->size += 8;
11502
11503 if (htab->relbrlt != NULL)
11504 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11505 else if (info->emitrelocations)
11506 {
11507 htab->brlt->reloc_count += 1;
11508 htab->brlt->flags |= SEC_RELOC;
11509 }
11510 }
11511
11512 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11513 off = (br_entry->offset
11514 + htab->brlt->output_offset
11515 + htab->brlt->output_section->vma
11516 - elf_gp (htab->brlt->output_section->owner)
11517 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11518
11519 if (info->emitrelocations)
11520 {
11521 stub_entry->group->stub_sec->reloc_count
11522 += 1 + (PPC_HA (off) != 0);
11523 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11524 }
11525
11526 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11527 {
11528 size = 12;
11529 if (PPC_HA (off) != 0)
11530 size = 16;
11531 }
11532 else
11533 {
11534 size = 16;
11535 if (PPC_HA (off) != 0)
11536 size += 4;
11537
11538 if (PPC_HA (r2off) != 0)
11539 size += 4;
11540 if (PPC_LO (r2off) != 0)
11541 size += 4;
11542 }
11543 }
11544 else if (info->emitrelocations)
11545 {
11546 stub_entry->group->stub_sec->reloc_count += 1;
11547 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11548 }
11549 }
11550
11551 stub_entry->group->stub_sec->size += size;
11552 return TRUE;
11553 }
11554
11555 /* Set up various things so that we can make a list of input sections
11556 for each output section included in the link. Returns -1 on error,
11557 0 when no stubs will be needed, and 1 on success. */
11558
11559 int
11560 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11561 {
11562 unsigned int id;
11563 bfd_size_type amt;
11564 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11565
11566 if (htab == NULL)
11567 return -1;
11568
11569 htab->sec_info_arr_size = bfd_get_next_section_id ();
11570 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11571 htab->sec_info = bfd_zmalloc (amt);
11572 if (htab->sec_info == NULL)
11573 return -1;
11574
11575 /* Set toc_off for com, und, abs and ind sections. */
11576 for (id = 0; id < 3; id++)
11577 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11578
11579 return 1;
11580 }
11581
11582 /* Set up for first pass at multitoc partitioning. */
11583
11584 void
11585 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11586 {
11587 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11588
11589 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11590 htab->toc_bfd = NULL;
11591 htab->toc_first_sec = NULL;
11592 }
11593
11594 /* The linker repeatedly calls this function for each TOC input section
11595 and linker generated GOT section. Group input bfds such that the toc
11596 within a group is less than 64k in size. */
11597
11598 bfd_boolean
11599 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11600 {
11601 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11602 bfd_vma addr, off, limit;
11603
11604 if (htab == NULL)
11605 return FALSE;
11606
11607 if (!htab->second_toc_pass)
11608 {
11609 /* Keep track of the first .toc or .got section for this input bfd. */
11610 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11611
11612 if (new_bfd)
11613 {
11614 htab->toc_bfd = isec->owner;
11615 htab->toc_first_sec = isec;
11616 }
11617
11618 addr = isec->output_offset + isec->output_section->vma;
11619 off = addr - htab->toc_curr;
11620 limit = 0x80008000;
11621 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11622 limit = 0x10000;
11623 if (off + isec->size > limit)
11624 {
11625 addr = (htab->toc_first_sec->output_offset
11626 + htab->toc_first_sec->output_section->vma);
11627 htab->toc_curr = addr;
11628 htab->toc_curr &= -TOC_BASE_ALIGN;
11629 }
11630
11631 /* toc_curr is the base address of this toc group. Set elf_gp
11632 for the input section to be the offset relative to the
11633 output toc base plus 0x8000. Making the input elf_gp an
11634 offset allows us to move the toc as a whole without
11635 recalculating input elf_gp. */
11636 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11637 off += TOC_BASE_OFF;
11638
11639 /* Die if someone uses a linker script that doesn't keep input
11640 file .toc and .got together. */
11641 if (new_bfd
11642 && elf_gp (isec->owner) != 0
11643 && elf_gp (isec->owner) != off)
11644 return FALSE;
11645
11646 elf_gp (isec->owner) = off;
11647 return TRUE;
11648 }
11649
11650 /* During the second pass toc_first_sec points to the start of
11651 a toc group, and toc_curr is used to track the old elf_gp.
11652 We use toc_bfd to ensure we only look at each bfd once. */
11653 if (htab->toc_bfd == isec->owner)
11654 return TRUE;
11655 htab->toc_bfd = isec->owner;
11656
11657 if (htab->toc_first_sec == NULL
11658 || htab->toc_curr != elf_gp (isec->owner))
11659 {
11660 htab->toc_curr = elf_gp (isec->owner);
11661 htab->toc_first_sec = isec;
11662 }
11663 addr = (htab->toc_first_sec->output_offset
11664 + htab->toc_first_sec->output_section->vma);
11665 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11666 elf_gp (isec->owner) = off;
11667
11668 return TRUE;
11669 }
11670
11671 /* Called via elf_link_hash_traverse to merge GOT entries for global
11672 symbol H. */
11673
11674 static bfd_boolean
11675 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11676 {
11677 if (h->root.type == bfd_link_hash_indirect)
11678 return TRUE;
11679
11680 merge_got_entries (&h->got.glist);
11681
11682 return TRUE;
11683 }
11684
11685 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11686 symbol H. */
11687
11688 static bfd_boolean
11689 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11690 {
11691 struct got_entry *gent;
11692
11693 if (h->root.type == bfd_link_hash_indirect)
11694 return TRUE;
11695
11696 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11697 if (!gent->is_indirect)
11698 allocate_got (h, (struct bfd_link_info *) inf, gent);
11699 return TRUE;
11700 }
11701
11702 /* Called on the first multitoc pass after the last call to
11703 ppc64_elf_next_toc_section. This function removes duplicate GOT
11704 entries. */
11705
11706 bfd_boolean
11707 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11708 {
11709 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11710 struct bfd *ibfd, *ibfd2;
11711 bfd_boolean done_something;
11712
11713 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11714
11715 if (!htab->do_multi_toc)
11716 return FALSE;
11717
11718 /* Merge global sym got entries within a toc group. */
11719 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11720
11721 /* And tlsld_got. */
11722 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11723 {
11724 struct got_entry *ent, *ent2;
11725
11726 if (!is_ppc64_elf (ibfd))
11727 continue;
11728
11729 ent = ppc64_tlsld_got (ibfd);
11730 if (!ent->is_indirect
11731 && ent->got.offset != (bfd_vma) -1)
11732 {
11733 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11734 {
11735 if (!is_ppc64_elf (ibfd2))
11736 continue;
11737
11738 ent2 = ppc64_tlsld_got (ibfd2);
11739 if (!ent2->is_indirect
11740 && ent2->got.offset != (bfd_vma) -1
11741 && elf_gp (ibfd2) == elf_gp (ibfd))
11742 {
11743 ent2->is_indirect = TRUE;
11744 ent2->got.ent = ent;
11745 }
11746 }
11747 }
11748 }
11749
11750 /* Zap sizes of got sections. */
11751 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11752 htab->elf.irelplt->size -= htab->got_reli_size;
11753 htab->got_reli_size = 0;
11754
11755 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11756 {
11757 asection *got, *relgot;
11758
11759 if (!is_ppc64_elf (ibfd))
11760 continue;
11761
11762 got = ppc64_elf_tdata (ibfd)->got;
11763 if (got != NULL)
11764 {
11765 got->rawsize = got->size;
11766 got->size = 0;
11767 relgot = ppc64_elf_tdata (ibfd)->relgot;
11768 relgot->rawsize = relgot->size;
11769 relgot->size = 0;
11770 }
11771 }
11772
11773 /* Now reallocate the got, local syms first. We don't need to
11774 allocate section contents again since we never increase size. */
11775 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11776 {
11777 struct got_entry **lgot_ents;
11778 struct got_entry **end_lgot_ents;
11779 struct plt_entry **local_plt;
11780 struct plt_entry **end_local_plt;
11781 unsigned char *lgot_masks;
11782 bfd_size_type locsymcount;
11783 Elf_Internal_Shdr *symtab_hdr;
11784 asection *s;
11785
11786 if (!is_ppc64_elf (ibfd))
11787 continue;
11788
11789 lgot_ents = elf_local_got_ents (ibfd);
11790 if (!lgot_ents)
11791 continue;
11792
11793 symtab_hdr = &elf_symtab_hdr (ibfd);
11794 locsymcount = symtab_hdr->sh_info;
11795 end_lgot_ents = lgot_ents + locsymcount;
11796 local_plt = (struct plt_entry **) end_lgot_ents;
11797 end_local_plt = local_plt + locsymcount;
11798 lgot_masks = (unsigned char *) end_local_plt;
11799 s = ppc64_elf_tdata (ibfd)->got;
11800 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11801 {
11802 struct got_entry *ent;
11803
11804 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11805 {
11806 unsigned int ent_size = 8;
11807 unsigned int rel_size = sizeof (Elf64_External_Rela);
11808
11809 ent->got.offset = s->size;
11810 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11811 {
11812 ent_size *= 2;
11813 rel_size *= 2;
11814 }
11815 s->size += ent_size;
11816 if ((*lgot_masks & PLT_IFUNC) != 0)
11817 {
11818 htab->elf.irelplt->size += rel_size;
11819 htab->got_reli_size += rel_size;
11820 }
11821 else if (bfd_link_pic (info))
11822 {
11823 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11824 srel->size += rel_size;
11825 }
11826 }
11827 }
11828 }
11829
11830 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11831
11832 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11833 {
11834 struct got_entry *ent;
11835
11836 if (!is_ppc64_elf (ibfd))
11837 continue;
11838
11839 ent = ppc64_tlsld_got (ibfd);
11840 if (!ent->is_indirect
11841 && ent->got.offset != (bfd_vma) -1)
11842 {
11843 asection *s = ppc64_elf_tdata (ibfd)->got;
11844 ent->got.offset = s->size;
11845 s->size += 16;
11846 if (bfd_link_pic (info))
11847 {
11848 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11849 srel->size += sizeof (Elf64_External_Rela);
11850 }
11851 }
11852 }
11853
11854 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11855 if (!done_something)
11856 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11857 {
11858 asection *got;
11859
11860 if (!is_ppc64_elf (ibfd))
11861 continue;
11862
11863 got = ppc64_elf_tdata (ibfd)->got;
11864 if (got != NULL)
11865 {
11866 done_something = got->rawsize != got->size;
11867 if (done_something)
11868 break;
11869 }
11870 }
11871
11872 if (done_something)
11873 (*htab->params->layout_sections_again) ();
11874
11875 /* Set up for second pass over toc sections to recalculate elf_gp
11876 on input sections. */
11877 htab->toc_bfd = NULL;
11878 htab->toc_first_sec = NULL;
11879 htab->second_toc_pass = TRUE;
11880 return done_something;
11881 }
11882
11883 /* Called after second pass of multitoc partitioning. */
11884
11885 void
11886 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11887 {
11888 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11889
11890 /* After the second pass, toc_curr tracks the TOC offset used
11891 for code sections below in ppc64_elf_next_input_section. */
11892 htab->toc_curr = TOC_BASE_OFF;
11893 }
11894
11895 /* No toc references were found in ISEC. If the code in ISEC makes no
11896 calls, then there's no need to use toc adjusting stubs when branching
11897 into ISEC. Actually, indirect calls from ISEC are OK as they will
11898 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11899 needed, and 2 if a cyclical call-graph was found but no other reason
11900 for a stub was detected. If called from the top level, a return of
11901 2 means the same as a return of 0. */
11902
11903 static int
11904 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11905 {
11906 int ret;
11907
11908 /* Mark this section as checked. */
11909 isec->call_check_done = 1;
11910
11911 /* We know none of our code bearing sections will need toc stubs. */
11912 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11913 return 0;
11914
11915 if (isec->size == 0)
11916 return 0;
11917
11918 if (isec->output_section == NULL)
11919 return 0;
11920
11921 ret = 0;
11922 if (isec->reloc_count != 0)
11923 {
11924 Elf_Internal_Rela *relstart, *rel;
11925 Elf_Internal_Sym *local_syms;
11926 struct ppc_link_hash_table *htab;
11927
11928 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11929 info->keep_memory);
11930 if (relstart == NULL)
11931 return -1;
11932
11933 /* Look for branches to outside of this section. */
11934 local_syms = NULL;
11935 htab = ppc_hash_table (info);
11936 if (htab == NULL)
11937 return -1;
11938
11939 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11940 {
11941 enum elf_ppc64_reloc_type r_type;
11942 unsigned long r_symndx;
11943 struct elf_link_hash_entry *h;
11944 struct ppc_link_hash_entry *eh;
11945 Elf_Internal_Sym *sym;
11946 asection *sym_sec;
11947 struct _opd_sec_data *opd;
11948 bfd_vma sym_value;
11949 bfd_vma dest;
11950
11951 r_type = ELF64_R_TYPE (rel->r_info);
11952 if (r_type != R_PPC64_REL24
11953 && r_type != R_PPC64_REL14
11954 && r_type != R_PPC64_REL14_BRTAKEN
11955 && r_type != R_PPC64_REL14_BRNTAKEN)
11956 continue;
11957
11958 r_symndx = ELF64_R_SYM (rel->r_info);
11959 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11960 isec->owner))
11961 {
11962 ret = -1;
11963 break;
11964 }
11965
11966 /* Calls to dynamic lib functions go through a plt call stub
11967 that uses r2. */
11968 eh = (struct ppc_link_hash_entry *) h;
11969 if (eh != NULL
11970 && (eh->elf.plt.plist != NULL
11971 || (eh->oh != NULL
11972 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11973 {
11974 ret = 1;
11975 break;
11976 }
11977
11978 if (sym_sec == NULL)
11979 /* Ignore other undefined symbols. */
11980 continue;
11981
11982 /* Assume branches to other sections not included in the
11983 link need stubs too, to cover -R and absolute syms. */
11984 if (sym_sec->output_section == NULL)
11985 {
11986 ret = 1;
11987 break;
11988 }
11989
11990 if (h == NULL)
11991 sym_value = sym->st_value;
11992 else
11993 {
11994 if (h->root.type != bfd_link_hash_defined
11995 && h->root.type != bfd_link_hash_defweak)
11996 abort ();
11997 sym_value = h->root.u.def.value;
11998 }
11999 sym_value += rel->r_addend;
12000
12001 /* If this branch reloc uses an opd sym, find the code section. */
12002 opd = get_opd_info (sym_sec);
12003 if (opd != NULL)
12004 {
12005 if (h == NULL && opd->adjust != NULL)
12006 {
12007 long adjust;
12008
12009 adjust = opd->adjust[OPD_NDX (sym_value)];
12010 if (adjust == -1)
12011 /* Assume deleted functions won't ever be called. */
12012 continue;
12013 sym_value += adjust;
12014 }
12015
12016 dest = opd_entry_value (sym_sec, sym_value,
12017 &sym_sec, NULL, FALSE);
12018 if (dest == (bfd_vma) -1)
12019 continue;
12020 }
12021 else
12022 dest = (sym_value
12023 + sym_sec->output_offset
12024 + sym_sec->output_section->vma);
12025
12026 /* Ignore branch to self. */
12027 if (sym_sec == isec)
12028 continue;
12029
12030 /* If the called function uses the toc, we need a stub. */
12031 if (sym_sec->has_toc_reloc
12032 || sym_sec->makes_toc_func_call)
12033 {
12034 ret = 1;
12035 break;
12036 }
12037
12038 /* Assume any branch that needs a long branch stub might in fact
12039 need a plt_branch stub. A plt_branch stub uses r2. */
12040 else if (dest - (isec->output_offset
12041 + isec->output_section->vma
12042 + rel->r_offset) + (1 << 25)
12043 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12044 ? h->other
12045 : sym->st_other))
12046 {
12047 ret = 1;
12048 break;
12049 }
12050
12051 /* If calling back to a section in the process of being
12052 tested, we can't say for sure that no toc adjusting stubs
12053 are needed, so don't return zero. */
12054 else if (sym_sec->call_check_in_progress)
12055 ret = 2;
12056
12057 /* Branches to another section that itself doesn't have any TOC
12058 references are OK. Recursively call ourselves to check. */
12059 else if (!sym_sec->call_check_done)
12060 {
12061 int recur;
12062
12063 /* Mark current section as indeterminate, so that other
12064 sections that call back to current won't be marked as
12065 known. */
12066 isec->call_check_in_progress = 1;
12067 recur = toc_adjusting_stub_needed (info, sym_sec);
12068 isec->call_check_in_progress = 0;
12069
12070 if (recur != 0)
12071 {
12072 ret = recur;
12073 if (recur != 2)
12074 break;
12075 }
12076 }
12077 }
12078
12079 if (local_syms != NULL
12080 && (elf_symtab_hdr (isec->owner).contents
12081 != (unsigned char *) local_syms))
12082 free (local_syms);
12083 if (elf_section_data (isec)->relocs != relstart)
12084 free (relstart);
12085 }
12086
12087 if ((ret & 1) == 0
12088 && isec->map_head.s != NULL
12089 && (strcmp (isec->output_section->name, ".init") == 0
12090 || strcmp (isec->output_section->name, ".fini") == 0))
12091 {
12092 if (isec->map_head.s->has_toc_reloc
12093 || isec->map_head.s->makes_toc_func_call)
12094 ret = 1;
12095 else if (!isec->map_head.s->call_check_done)
12096 {
12097 int recur;
12098 isec->call_check_in_progress = 1;
12099 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12100 isec->call_check_in_progress = 0;
12101 if (recur != 0)
12102 ret = recur;
12103 }
12104 }
12105
12106 if (ret == 1)
12107 isec->makes_toc_func_call = 1;
12108
12109 return ret;
12110 }
12111
12112 /* The linker repeatedly calls this function for each input section,
12113 in the order that input sections are linked into output sections.
12114 Build lists of input sections to determine groupings between which
12115 we may insert linker stubs. */
12116
12117 bfd_boolean
12118 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12119 {
12120 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12121
12122 if (htab == NULL)
12123 return FALSE;
12124
12125 if ((isec->output_section->flags & SEC_CODE) != 0
12126 && isec->output_section->id < htab->sec_info_arr_size)
12127 {
12128 /* This happens to make the list in reverse order,
12129 which is what we want. */
12130 htab->sec_info[isec->id].u.list
12131 = htab->sec_info[isec->output_section->id].u.list;
12132 htab->sec_info[isec->output_section->id].u.list = isec;
12133 }
12134
12135 if (htab->multi_toc_needed)
12136 {
12137 /* Analyse sections that aren't already flagged as needing a
12138 valid toc pointer. Exclude .fixup for the linux kernel.
12139 .fixup contains branches, but only back to the function that
12140 hit an exception. */
12141 if (!(isec->has_toc_reloc
12142 || (isec->flags & SEC_CODE) == 0
12143 || strcmp (isec->name, ".fixup") == 0
12144 || isec->call_check_done))
12145 {
12146 if (toc_adjusting_stub_needed (info, isec) < 0)
12147 return FALSE;
12148 }
12149 /* Make all sections use the TOC assigned for this object file.
12150 This will be wrong for pasted sections; We fix that in
12151 check_pasted_section(). */
12152 if (elf_gp (isec->owner) != 0)
12153 htab->toc_curr = elf_gp (isec->owner);
12154 }
12155
12156 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12157 return TRUE;
12158 }
12159
12160 /* Check that all .init and .fini sections use the same toc, if they
12161 have toc relocs. */
12162
12163 static bfd_boolean
12164 check_pasted_section (struct bfd_link_info *info, const char *name)
12165 {
12166 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12167
12168 if (o != NULL)
12169 {
12170 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12171 bfd_vma toc_off = 0;
12172 asection *i;
12173
12174 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12175 if (i->has_toc_reloc)
12176 {
12177 if (toc_off == 0)
12178 toc_off = htab->sec_info[i->id].toc_off;
12179 else if (toc_off != htab->sec_info[i->id].toc_off)
12180 return FALSE;
12181 }
12182
12183 if (toc_off == 0)
12184 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12185 if (i->makes_toc_func_call)
12186 {
12187 toc_off = htab->sec_info[i->id].toc_off;
12188 break;
12189 }
12190
12191 /* Make sure the whole pasted function uses the same toc offset. */
12192 if (toc_off != 0)
12193 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12194 htab->sec_info[i->id].toc_off = toc_off;
12195 }
12196 return TRUE;
12197 }
12198
12199 bfd_boolean
12200 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12201 {
12202 return (check_pasted_section (info, ".init")
12203 & check_pasted_section (info, ".fini"));
12204 }
12205
12206 /* See whether we can group stub sections together. Grouping stub
12207 sections may result in fewer stubs. More importantly, we need to
12208 put all .init* and .fini* stubs at the beginning of the .init or
12209 .fini output sections respectively, because glibc splits the
12210 _init and _fini functions into multiple parts. Putting a stub in
12211 the middle of a function is not a good idea. */
12212
12213 static bfd_boolean
12214 group_sections (struct bfd_link_info *info,
12215 bfd_size_type stub_group_size,
12216 bfd_boolean stubs_always_before_branch)
12217 {
12218 struct ppc_link_hash_table *htab;
12219 asection *osec;
12220 bfd_boolean suppress_size_errors;
12221
12222 htab = ppc_hash_table (info);
12223 if (htab == NULL)
12224 return FALSE;
12225
12226 suppress_size_errors = FALSE;
12227 if (stub_group_size == 1)
12228 {
12229 /* Default values. */
12230 if (stubs_always_before_branch)
12231 stub_group_size = 0x1e00000;
12232 else
12233 stub_group_size = 0x1c00000;
12234 suppress_size_errors = TRUE;
12235 }
12236
12237 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12238 {
12239 asection *tail;
12240
12241 if (osec->id >= htab->sec_info_arr_size)
12242 continue;
12243
12244 tail = htab->sec_info[osec->id].u.list;
12245 while (tail != NULL)
12246 {
12247 asection *curr;
12248 asection *prev;
12249 bfd_size_type total;
12250 bfd_boolean big_sec;
12251 bfd_vma curr_toc;
12252 struct map_stub *group;
12253 bfd_size_type group_size;
12254
12255 curr = tail;
12256 total = tail->size;
12257 group_size = (ppc64_elf_section_data (tail) != NULL
12258 && ppc64_elf_section_data (tail)->has_14bit_branch
12259 ? stub_group_size >> 10 : stub_group_size);
12260
12261 big_sec = total > group_size;
12262 if (big_sec && !suppress_size_errors)
12263 /* xgettext:c-format */
12264 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12265 tail->owner, tail);
12266 curr_toc = htab->sec_info[tail->id].toc_off;
12267
12268 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12269 && ((total += curr->output_offset - prev->output_offset)
12270 < (ppc64_elf_section_data (prev) != NULL
12271 && ppc64_elf_section_data (prev)->has_14bit_branch
12272 ? (group_size = stub_group_size >> 10) : group_size))
12273 && htab->sec_info[prev->id].toc_off == curr_toc)
12274 curr = prev;
12275
12276 /* OK, the size from the start of CURR to the end is less
12277 than group_size and thus can be handled by one stub
12278 section. (or the tail section is itself larger than
12279 group_size, in which case we may be toast.) We should
12280 really be keeping track of the total size of stubs added
12281 here, as stubs contribute to the final output section
12282 size. That's a little tricky, and this way will only
12283 break if stubs added make the total size more than 2^25,
12284 ie. for the default stub_group_size, if stubs total more
12285 than 2097152 bytes, or nearly 75000 plt call stubs. */
12286 group = bfd_alloc (curr->owner, sizeof (*group));
12287 if (group == NULL)
12288 return FALSE;
12289 group->link_sec = curr;
12290 group->stub_sec = NULL;
12291 group->needs_save_res = 0;
12292 group->tls_get_addr_opt_bctrl = -1u;
12293 group->next = htab->group;
12294 htab->group = group;
12295 do
12296 {
12297 prev = htab->sec_info[tail->id].u.list;
12298 /* Set up this stub group. */
12299 htab->sec_info[tail->id].u.group = group;
12300 }
12301 while (tail != curr && (tail = prev) != NULL);
12302
12303 /* But wait, there's more! Input sections up to group_size
12304 bytes before the stub section can be handled by it too.
12305 Don't do this if we have a really large section after the
12306 stubs, as adding more stubs increases the chance that
12307 branches may not reach into the stub section. */
12308 if (!stubs_always_before_branch && !big_sec)
12309 {
12310 total = 0;
12311 while (prev != NULL
12312 && ((total += tail->output_offset - prev->output_offset)
12313 < (ppc64_elf_section_data (prev) != NULL
12314 && ppc64_elf_section_data (prev)->has_14bit_branch
12315 ? (group_size = stub_group_size >> 10) : group_size))
12316 && htab->sec_info[prev->id].toc_off == curr_toc)
12317 {
12318 tail = prev;
12319 prev = htab->sec_info[tail->id].u.list;
12320 htab->sec_info[tail->id].u.group = group;
12321 }
12322 }
12323 tail = prev;
12324 }
12325 }
12326 return TRUE;
12327 }
12328
12329 static const unsigned char glink_eh_frame_cie[] =
12330 {
12331 0, 0, 0, 16, /* length. */
12332 0, 0, 0, 0, /* id. */
12333 1, /* CIE version. */
12334 'z', 'R', 0, /* Augmentation string. */
12335 4, /* Code alignment. */
12336 0x78, /* Data alignment. */
12337 65, /* RA reg. */
12338 1, /* Augmentation size. */
12339 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12340 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12341 };
12342
12343 static size_t
12344 stub_eh_frame_size (struct map_stub *group, size_t align)
12345 {
12346 size_t this_size = 17;
12347 if (group->tls_get_addr_opt_bctrl != -1u)
12348 {
12349 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12350 if (to_bctrl < 64)
12351 this_size += 1;
12352 else if (to_bctrl < 256)
12353 this_size += 2;
12354 else if (to_bctrl < 65536)
12355 this_size += 3;
12356 else
12357 this_size += 5;
12358 this_size += 6;
12359 }
12360 this_size = (this_size + align - 1) & -align;
12361 return this_size;
12362 }
12363
12364 /* Stripping output sections is normally done before dynamic section
12365 symbols have been allocated. This function is called later, and
12366 handles cases like htab->brlt which is mapped to its own output
12367 section. */
12368
12369 static void
12370 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12371 {
12372 if (isec->size == 0
12373 && isec->output_section->size == 0
12374 && !(isec->output_section->flags & SEC_KEEP)
12375 && !bfd_section_removed_from_list (info->output_bfd,
12376 isec->output_section)
12377 && elf_section_data (isec->output_section)->dynindx == 0)
12378 {
12379 isec->output_section->flags |= SEC_EXCLUDE;
12380 bfd_section_list_remove (info->output_bfd, isec->output_section);
12381 info->output_bfd->section_count--;
12382 }
12383 }
12384
12385 /* Determine and set the size of the stub section for a final link.
12386
12387 The basic idea here is to examine all the relocations looking for
12388 PC-relative calls to a target that is unreachable with a "bl"
12389 instruction. */
12390
12391 bfd_boolean
12392 ppc64_elf_size_stubs (struct bfd_link_info *info)
12393 {
12394 bfd_size_type stub_group_size;
12395 bfd_boolean stubs_always_before_branch;
12396 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12397
12398 if (htab == NULL)
12399 return FALSE;
12400
12401 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12402 htab->params->plt_thread_safe = 1;
12403 if (!htab->opd_abi)
12404 htab->params->plt_thread_safe = 0;
12405 else if (htab->params->plt_thread_safe == -1)
12406 {
12407 static const char *const thread_starter[] =
12408 {
12409 "pthread_create",
12410 /* libstdc++ */
12411 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12412 /* librt */
12413 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12414 "mq_notify", "create_timer",
12415 /* libanl */
12416 "getaddrinfo_a",
12417 /* libgomp */
12418 "GOMP_parallel",
12419 "GOMP_parallel_start",
12420 "GOMP_parallel_loop_static",
12421 "GOMP_parallel_loop_static_start",
12422 "GOMP_parallel_loop_dynamic",
12423 "GOMP_parallel_loop_dynamic_start",
12424 "GOMP_parallel_loop_guided",
12425 "GOMP_parallel_loop_guided_start",
12426 "GOMP_parallel_loop_runtime",
12427 "GOMP_parallel_loop_runtime_start",
12428 "GOMP_parallel_sections",
12429 "GOMP_parallel_sections_start",
12430 /* libgo */
12431 "__go_go",
12432 };
12433 unsigned i;
12434
12435 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12436 {
12437 struct elf_link_hash_entry *h;
12438 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12439 FALSE, FALSE, TRUE);
12440 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12441 if (htab->params->plt_thread_safe)
12442 break;
12443 }
12444 }
12445 stubs_always_before_branch = htab->params->group_size < 0;
12446 if (htab->params->group_size < 0)
12447 stub_group_size = -htab->params->group_size;
12448 else
12449 stub_group_size = htab->params->group_size;
12450
12451 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12452 return FALSE;
12453
12454 #define STUB_SHRINK_ITER 20
12455 /* Loop until no stubs added. After iteration 20 of this loop we may
12456 exit on a stub section shrinking. This is to break out of a
12457 pathological case where adding stubs on one iteration decreases
12458 section gaps (perhaps due to alignment), which then requires
12459 fewer or smaller stubs on the next iteration. */
12460
12461 while (1)
12462 {
12463 bfd *input_bfd;
12464 unsigned int bfd_indx;
12465 struct map_stub *group;
12466
12467 htab->stub_iteration += 1;
12468
12469 for (input_bfd = info->input_bfds, bfd_indx = 0;
12470 input_bfd != NULL;
12471 input_bfd = input_bfd->link.next, bfd_indx++)
12472 {
12473 Elf_Internal_Shdr *symtab_hdr;
12474 asection *section;
12475 Elf_Internal_Sym *local_syms = NULL;
12476
12477 if (!is_ppc64_elf (input_bfd))
12478 continue;
12479
12480 /* We'll need the symbol table in a second. */
12481 symtab_hdr = &elf_symtab_hdr (input_bfd);
12482 if (symtab_hdr->sh_info == 0)
12483 continue;
12484
12485 /* Walk over each section attached to the input bfd. */
12486 for (section = input_bfd->sections;
12487 section != NULL;
12488 section = section->next)
12489 {
12490 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12491
12492 /* If there aren't any relocs, then there's nothing more
12493 to do. */
12494 if ((section->flags & SEC_RELOC) == 0
12495 || (section->flags & SEC_ALLOC) == 0
12496 || (section->flags & SEC_LOAD) == 0
12497 || (section->flags & SEC_CODE) == 0
12498 || section->reloc_count == 0)
12499 continue;
12500
12501 /* If this section is a link-once section that will be
12502 discarded, then don't create any stubs. */
12503 if (section->output_section == NULL
12504 || section->output_section->owner != info->output_bfd)
12505 continue;
12506
12507 /* Get the relocs. */
12508 internal_relocs
12509 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12510 info->keep_memory);
12511 if (internal_relocs == NULL)
12512 goto error_ret_free_local;
12513
12514 /* Now examine each relocation. */
12515 irela = internal_relocs;
12516 irelaend = irela + section->reloc_count;
12517 for (; irela < irelaend; irela++)
12518 {
12519 enum elf_ppc64_reloc_type r_type;
12520 unsigned int r_indx;
12521 enum ppc_stub_type stub_type;
12522 struct ppc_stub_hash_entry *stub_entry;
12523 asection *sym_sec, *code_sec;
12524 bfd_vma sym_value, code_value;
12525 bfd_vma destination;
12526 unsigned long local_off;
12527 bfd_boolean ok_dest;
12528 struct ppc_link_hash_entry *hash;
12529 struct ppc_link_hash_entry *fdh;
12530 struct elf_link_hash_entry *h;
12531 Elf_Internal_Sym *sym;
12532 char *stub_name;
12533 const asection *id_sec;
12534 struct _opd_sec_data *opd;
12535 struct plt_entry *plt_ent;
12536
12537 r_type = ELF64_R_TYPE (irela->r_info);
12538 r_indx = ELF64_R_SYM (irela->r_info);
12539
12540 if (r_type >= R_PPC64_max)
12541 {
12542 bfd_set_error (bfd_error_bad_value);
12543 goto error_ret_free_internal;
12544 }
12545
12546 /* Only look for stubs on branch instructions. */
12547 if (r_type != R_PPC64_REL24
12548 && r_type != R_PPC64_REL14
12549 && r_type != R_PPC64_REL14_BRTAKEN
12550 && r_type != R_PPC64_REL14_BRNTAKEN)
12551 continue;
12552
12553 /* Now determine the call target, its name, value,
12554 section. */
12555 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12556 r_indx, input_bfd))
12557 goto error_ret_free_internal;
12558 hash = (struct ppc_link_hash_entry *) h;
12559
12560 ok_dest = FALSE;
12561 fdh = NULL;
12562 sym_value = 0;
12563 if (hash == NULL)
12564 {
12565 sym_value = sym->st_value;
12566 if (sym_sec != NULL
12567 && sym_sec->output_section != NULL)
12568 ok_dest = TRUE;
12569 }
12570 else if (hash->elf.root.type == bfd_link_hash_defined
12571 || hash->elf.root.type == bfd_link_hash_defweak)
12572 {
12573 sym_value = hash->elf.root.u.def.value;
12574 if (sym_sec->output_section != NULL)
12575 ok_dest = TRUE;
12576 }
12577 else if (hash->elf.root.type == bfd_link_hash_undefweak
12578 || hash->elf.root.type == bfd_link_hash_undefined)
12579 {
12580 /* Recognise an old ABI func code entry sym, and
12581 use the func descriptor sym instead if it is
12582 defined. */
12583 if (hash->elf.root.root.string[0] == '.'
12584 && hash->oh != NULL)
12585 {
12586 fdh = ppc_follow_link (hash->oh);
12587 if (fdh->elf.root.type == bfd_link_hash_defined
12588 || fdh->elf.root.type == bfd_link_hash_defweak)
12589 {
12590 sym_sec = fdh->elf.root.u.def.section;
12591 sym_value = fdh->elf.root.u.def.value;
12592 if (sym_sec->output_section != NULL)
12593 ok_dest = TRUE;
12594 }
12595 else
12596 fdh = NULL;
12597 }
12598 }
12599 else
12600 {
12601 bfd_set_error (bfd_error_bad_value);
12602 goto error_ret_free_internal;
12603 }
12604
12605 destination = 0;
12606 local_off = 0;
12607 if (ok_dest)
12608 {
12609 sym_value += irela->r_addend;
12610 destination = (sym_value
12611 + sym_sec->output_offset
12612 + sym_sec->output_section->vma);
12613 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12614 ? hash->elf.other
12615 : sym->st_other);
12616 }
12617
12618 code_sec = sym_sec;
12619 code_value = sym_value;
12620 opd = get_opd_info (sym_sec);
12621 if (opd != NULL)
12622 {
12623 bfd_vma dest;
12624
12625 if (hash == NULL && opd->adjust != NULL)
12626 {
12627 long adjust = opd->adjust[OPD_NDX (sym_value)];
12628 if (adjust == -1)
12629 continue;
12630 code_value += adjust;
12631 sym_value += adjust;
12632 }
12633 dest = opd_entry_value (sym_sec, sym_value,
12634 &code_sec, &code_value, FALSE);
12635 if (dest != (bfd_vma) -1)
12636 {
12637 destination = dest;
12638 if (fdh != NULL)
12639 {
12640 /* Fixup old ABI sym to point at code
12641 entry. */
12642 hash->elf.root.type = bfd_link_hash_defweak;
12643 hash->elf.root.u.def.section = code_sec;
12644 hash->elf.root.u.def.value = code_value;
12645 }
12646 }
12647 }
12648
12649 /* Determine what (if any) linker stub is needed. */
12650 plt_ent = NULL;
12651 stub_type = ppc_type_of_stub (section, irela, &hash,
12652 &plt_ent, destination,
12653 local_off);
12654
12655 if (stub_type != ppc_stub_plt_call)
12656 {
12657 /* Check whether we need a TOC adjusting stub.
12658 Since the linker pastes together pieces from
12659 different object files when creating the
12660 _init and _fini functions, it may be that a
12661 call to what looks like a local sym is in
12662 fact a call needing a TOC adjustment. */
12663 if (code_sec != NULL
12664 && code_sec->output_section != NULL
12665 && (htab->sec_info[code_sec->id].toc_off
12666 != htab->sec_info[section->id].toc_off)
12667 && (code_sec->has_toc_reloc
12668 || code_sec->makes_toc_func_call))
12669 stub_type = ppc_stub_long_branch_r2off;
12670 }
12671
12672 if (stub_type == ppc_stub_none)
12673 continue;
12674
12675 /* __tls_get_addr calls might be eliminated. */
12676 if (stub_type != ppc_stub_plt_call
12677 && hash != NULL
12678 && (hash == htab->tls_get_addr
12679 || hash == htab->tls_get_addr_fd)
12680 && section->has_tls_reloc
12681 && irela != internal_relocs)
12682 {
12683 /* Get tls info. */
12684 unsigned char *tls_mask;
12685
12686 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12687 irela - 1, input_bfd))
12688 goto error_ret_free_internal;
12689 if (*tls_mask != 0)
12690 continue;
12691 }
12692
12693 if (stub_type == ppc_stub_plt_call)
12694 {
12695 if (!htab->opd_abi
12696 && htab->params->plt_localentry0 != 0
12697 && is_elfv2_localentry0 (&hash->elf))
12698 htab->has_plt_localentry0 = 1;
12699 else if (irela + 1 < irelaend
12700 && irela[1].r_offset == irela->r_offset + 4
12701 && (ELF64_R_TYPE (irela[1].r_info)
12702 == R_PPC64_TOCSAVE))
12703 {
12704 if (!tocsave_find (htab, INSERT,
12705 &local_syms, irela + 1, input_bfd))
12706 goto error_ret_free_internal;
12707 }
12708 else
12709 stub_type = ppc_stub_plt_call_r2save;
12710 }
12711
12712 /* Support for grouping stub sections. */
12713 id_sec = htab->sec_info[section->id].u.group->link_sec;
12714
12715 /* Get the name of this stub. */
12716 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12717 if (!stub_name)
12718 goto error_ret_free_internal;
12719
12720 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12721 stub_name, FALSE, FALSE);
12722 if (stub_entry != NULL)
12723 {
12724 /* The proper stub has already been created. */
12725 free (stub_name);
12726 if (stub_type == ppc_stub_plt_call_r2save)
12727 stub_entry->stub_type = stub_type;
12728 continue;
12729 }
12730
12731 stub_entry = ppc_add_stub (stub_name, section, info);
12732 if (stub_entry == NULL)
12733 {
12734 free (stub_name);
12735 error_ret_free_internal:
12736 if (elf_section_data (section)->relocs == NULL)
12737 free (internal_relocs);
12738 error_ret_free_local:
12739 if (local_syms != NULL
12740 && (symtab_hdr->contents
12741 != (unsigned char *) local_syms))
12742 free (local_syms);
12743 return FALSE;
12744 }
12745
12746 stub_entry->stub_type = stub_type;
12747 if (stub_type != ppc_stub_plt_call
12748 && stub_type != ppc_stub_plt_call_r2save)
12749 {
12750 stub_entry->target_value = code_value;
12751 stub_entry->target_section = code_sec;
12752 }
12753 else
12754 {
12755 stub_entry->target_value = sym_value;
12756 stub_entry->target_section = sym_sec;
12757 }
12758 stub_entry->h = hash;
12759 stub_entry->plt_ent = plt_ent;
12760 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12761
12762 if (stub_entry->h != NULL)
12763 htab->stub_globals += 1;
12764 }
12765
12766 /* We're done with the internal relocs, free them. */
12767 if (elf_section_data (section)->relocs != internal_relocs)
12768 free (internal_relocs);
12769 }
12770
12771 if (local_syms != NULL
12772 && symtab_hdr->contents != (unsigned char *) local_syms)
12773 {
12774 if (!info->keep_memory)
12775 free (local_syms);
12776 else
12777 symtab_hdr->contents = (unsigned char *) local_syms;
12778 }
12779 }
12780
12781 /* We may have added some stubs. Find out the new size of the
12782 stub sections. */
12783 for (group = htab->group; group != NULL; group = group->next)
12784 if (group->stub_sec != NULL)
12785 {
12786 asection *stub_sec = group->stub_sec;
12787
12788 if (htab->stub_iteration <= STUB_SHRINK_ITER
12789 || stub_sec->rawsize < stub_sec->size)
12790 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12791 stub_sec->rawsize = stub_sec->size;
12792 stub_sec->size = 0;
12793 stub_sec->reloc_count = 0;
12794 stub_sec->flags &= ~SEC_RELOC;
12795 }
12796
12797 htab->brlt->size = 0;
12798 htab->brlt->reloc_count = 0;
12799 htab->brlt->flags &= ~SEC_RELOC;
12800 if (htab->relbrlt != NULL)
12801 htab->relbrlt->size = 0;
12802
12803 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12804
12805 for (group = htab->group; group != NULL; group = group->next)
12806 if (group->needs_save_res)
12807 group->stub_sec->size += htab->sfpr->size;
12808
12809 if (info->emitrelocations
12810 && htab->glink != NULL && htab->glink->size != 0)
12811 {
12812 htab->glink->reloc_count = 1;
12813 htab->glink->flags |= SEC_RELOC;
12814 }
12815
12816 if (htab->glink_eh_frame != NULL
12817 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12818 && htab->glink_eh_frame->output_section->size != 0)
12819 {
12820 size_t size = 0, align = 4;
12821
12822 for (group = htab->group; group != NULL; group = group->next)
12823 if (group->stub_sec != NULL)
12824 size += stub_eh_frame_size (group, align);
12825 if (htab->glink != NULL && htab->glink->size != 0)
12826 size += (24 + align - 1) & -align;
12827 if (size != 0)
12828 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12829 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12830 size = (size + align - 1) & -align;
12831 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12832 htab->glink_eh_frame->size = size;
12833 }
12834
12835 if (htab->params->plt_stub_align != 0)
12836 for (group = htab->group; group != NULL; group = group->next)
12837 if (group->stub_sec != NULL)
12838 group->stub_sec->size = ((group->stub_sec->size
12839 + (1 << htab->params->plt_stub_align) - 1)
12840 & -(1 << htab->params->plt_stub_align));
12841
12842 for (group = htab->group; group != NULL; group = group->next)
12843 if (group->stub_sec != NULL
12844 && group->stub_sec->rawsize != group->stub_sec->size
12845 && (htab->stub_iteration <= STUB_SHRINK_ITER
12846 || group->stub_sec->rawsize < group->stub_sec->size))
12847 break;
12848
12849 if (group == NULL
12850 && (htab->glink_eh_frame == NULL
12851 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12852 break;
12853
12854 /* Ask the linker to do its stuff. */
12855 (*htab->params->layout_sections_again) ();
12856 }
12857
12858 if (htab->glink_eh_frame != NULL
12859 && htab->glink_eh_frame->size != 0)
12860 {
12861 bfd_vma val;
12862 bfd_byte *p, *last_fde;
12863 size_t last_fde_len, size, align, pad;
12864 struct map_stub *group;
12865
12866 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12867 if (p == NULL)
12868 return FALSE;
12869 htab->glink_eh_frame->contents = p;
12870 last_fde = p;
12871 align = 4;
12872
12873 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12874 /* CIE length (rewrite in case little-endian). */
12875 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12876 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12877 p += last_fde_len + 4;
12878
12879 for (group = htab->group; group != NULL; group = group->next)
12880 if (group->stub_sec != NULL)
12881 {
12882 last_fde = p;
12883 last_fde_len = stub_eh_frame_size (group, align) - 4;
12884 /* FDE length. */
12885 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12886 p += 4;
12887 /* CIE pointer. */
12888 val = p - htab->glink_eh_frame->contents;
12889 bfd_put_32 (htab->elf.dynobj, val, p);
12890 p += 4;
12891 /* Offset to stub section, written later. */
12892 p += 4;
12893 /* stub section size. */
12894 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12895 p += 4;
12896 /* Augmentation. */
12897 p += 1;
12898 if (group->tls_get_addr_opt_bctrl != -1u)
12899 {
12900 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12901
12902 /* This FDE needs more than just the default.
12903 Describe __tls_get_addr_opt stub LR. */
12904 if (to_bctrl < 64)
12905 *p++ = DW_CFA_advance_loc + to_bctrl;
12906 else if (to_bctrl < 256)
12907 {
12908 *p++ = DW_CFA_advance_loc1;
12909 *p++ = to_bctrl;
12910 }
12911 else if (to_bctrl < 65536)
12912 {
12913 *p++ = DW_CFA_advance_loc2;
12914 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12915 p += 2;
12916 }
12917 else
12918 {
12919 *p++ = DW_CFA_advance_loc4;
12920 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12921 p += 4;
12922 }
12923 *p++ = DW_CFA_offset_extended_sf;
12924 *p++ = 65;
12925 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12926 *p++ = DW_CFA_advance_loc + 4;
12927 *p++ = DW_CFA_restore_extended;
12928 *p++ = 65;
12929 }
12930 /* Pad. */
12931 p = last_fde + last_fde_len + 4;
12932 }
12933 if (htab->glink != NULL && htab->glink->size != 0)
12934 {
12935 last_fde = p;
12936 last_fde_len = ((24 + align - 1) & -align) - 4;
12937 /* FDE length. */
12938 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12939 p += 4;
12940 /* CIE pointer. */
12941 val = p - htab->glink_eh_frame->contents;
12942 bfd_put_32 (htab->elf.dynobj, val, p);
12943 p += 4;
12944 /* Offset to .glink, written later. */
12945 p += 4;
12946 /* .glink size. */
12947 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12948 p += 4;
12949 /* Augmentation. */
12950 p += 1;
12951
12952 *p++ = DW_CFA_advance_loc + 1;
12953 *p++ = DW_CFA_register;
12954 *p++ = 65;
12955 *p++ = htab->opd_abi ? 12 : 0;
12956 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12957 *p++ = DW_CFA_restore_extended;
12958 *p++ = 65;
12959 p += ((24 + align - 1) & -align) - 24;
12960 }
12961 /* Subsume any padding into the last FDE if user .eh_frame
12962 sections are aligned more than glink_eh_frame. Otherwise any
12963 zero padding will be seen as a terminator. */
12964 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12965 size = p - htab->glink_eh_frame->contents;
12966 pad = ((size + align - 1) & -align) - size;
12967 htab->glink_eh_frame->size = size + pad;
12968 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12969 }
12970
12971 maybe_strip_output (info, htab->brlt);
12972 if (htab->glink_eh_frame != NULL)
12973 maybe_strip_output (info, htab->glink_eh_frame);
12974
12975 return TRUE;
12976 }
12977
12978 /* Called after we have determined section placement. If sections
12979 move, we'll be called again. Provide a value for TOCstart. */
12980
12981 bfd_vma
12982 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12983 {
12984 asection *s;
12985 bfd_vma TOCstart, adjust;
12986
12987 if (info != NULL)
12988 {
12989 struct elf_link_hash_entry *h;
12990 struct elf_link_hash_table *htab = elf_hash_table (info);
12991
12992 if (is_elf_hash_table (htab)
12993 && htab->hgot != NULL)
12994 h = htab->hgot;
12995 else
12996 {
12997 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12998 if (is_elf_hash_table (htab))
12999 htab->hgot = h;
13000 }
13001 if (h != NULL
13002 && h->root.type == bfd_link_hash_defined
13003 && !h->root.linker_def
13004 && (!is_elf_hash_table (htab)
13005 || h->def_regular))
13006 {
13007 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
13008 + h->root.u.def.section->output_offset
13009 + h->root.u.def.section->output_section->vma);
13010 _bfd_set_gp_value (obfd, TOCstart);
13011 return TOCstart;
13012 }
13013 }
13014
13015 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
13016 order. The TOC starts where the first of these sections starts. */
13017 s = bfd_get_section_by_name (obfd, ".got");
13018 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13019 s = bfd_get_section_by_name (obfd, ".toc");
13020 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13021 s = bfd_get_section_by_name (obfd, ".tocbss");
13022 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13023 s = bfd_get_section_by_name (obfd, ".plt");
13024 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13025 {
13026 /* This may happen for
13027 o references to TOC base (SYM@toc / TOC[tc0]) without a
13028 .toc directive
13029 o bad linker script
13030 o --gc-sections and empty TOC sections
13031
13032 FIXME: Warn user? */
13033
13034 /* Look for a likely section. We probably won't even be
13035 using TOCstart. */
13036 for (s = obfd->sections; s != NULL; s = s->next)
13037 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13038 | SEC_EXCLUDE))
13039 == (SEC_ALLOC | SEC_SMALL_DATA))
13040 break;
13041 if (s == NULL)
13042 for (s = obfd->sections; s != NULL; s = s->next)
13043 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13044 == (SEC_ALLOC | SEC_SMALL_DATA))
13045 break;
13046 if (s == NULL)
13047 for (s = obfd->sections; s != NULL; s = s->next)
13048 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13049 == SEC_ALLOC)
13050 break;
13051 if (s == NULL)
13052 for (s = obfd->sections; s != NULL; s = s->next)
13053 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13054 break;
13055 }
13056
13057 TOCstart = 0;
13058 if (s != NULL)
13059 TOCstart = s->output_section->vma + s->output_offset;
13060
13061 /* Force alignment. */
13062 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13063 TOCstart -= adjust;
13064 _bfd_set_gp_value (obfd, TOCstart);
13065
13066 if (info != NULL && s != NULL)
13067 {
13068 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13069
13070 if (htab != NULL)
13071 {
13072 if (htab->elf.hgot != NULL)
13073 {
13074 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13075 htab->elf.hgot->root.u.def.section = s;
13076 }
13077 }
13078 else
13079 {
13080 struct bfd_link_hash_entry *bh = NULL;
13081 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13082 s, TOC_BASE_OFF - adjust,
13083 NULL, FALSE, FALSE, &bh);
13084 }
13085 }
13086 return TOCstart;
13087 }
13088
13089 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13090 write out any global entry stubs. */
13091
13092 static bfd_boolean
13093 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13094 {
13095 struct bfd_link_info *info;
13096 struct ppc_link_hash_table *htab;
13097 struct plt_entry *pent;
13098 asection *s;
13099
13100 if (h->root.type == bfd_link_hash_indirect)
13101 return TRUE;
13102
13103 if (!h->pointer_equality_needed)
13104 return TRUE;
13105
13106 if (h->def_regular)
13107 return TRUE;
13108
13109 info = inf;
13110 htab = ppc_hash_table (info);
13111 if (htab == NULL)
13112 return FALSE;
13113
13114 s = htab->glink;
13115 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13116 if (pent->plt.offset != (bfd_vma) -1
13117 && pent->addend == 0)
13118 {
13119 bfd_byte *p;
13120 asection *plt;
13121 bfd_vma off;
13122
13123 p = s->contents + h->root.u.def.value;
13124 plt = htab->elf.splt;
13125 if (!htab->elf.dynamic_sections_created
13126 || h->dynindx == -1)
13127 plt = htab->elf.iplt;
13128 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13129 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13130
13131 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13132 {
13133 info->callbacks->einfo
13134 (_("%P: linkage table error against `%T'\n"),
13135 h->root.root.string);
13136 bfd_set_error (bfd_error_bad_value);
13137 htab->stub_error = TRUE;
13138 }
13139
13140 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13141 if (htab->params->emit_stub_syms)
13142 {
13143 size_t len = strlen (h->root.root.string);
13144 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13145
13146 if (name == NULL)
13147 return FALSE;
13148
13149 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13150 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13151 if (h == NULL)
13152 return FALSE;
13153 if (h->root.type == bfd_link_hash_new)
13154 {
13155 h->root.type = bfd_link_hash_defined;
13156 h->root.u.def.section = s;
13157 h->root.u.def.value = p - s->contents;
13158 h->ref_regular = 1;
13159 h->def_regular = 1;
13160 h->ref_regular_nonweak = 1;
13161 h->forced_local = 1;
13162 h->non_elf = 0;
13163 h->root.linker_def = 1;
13164 }
13165 }
13166
13167 if (PPC_HA (off) != 0)
13168 {
13169 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13170 p += 4;
13171 }
13172 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13173 p += 4;
13174 bfd_put_32 (s->owner, MTCTR_R12, p);
13175 p += 4;
13176 bfd_put_32 (s->owner, BCTR, p);
13177 break;
13178 }
13179 return TRUE;
13180 }
13181
13182 /* Build all the stubs associated with the current output file.
13183 The stubs are kept in a hash table attached to the main linker
13184 hash table. This function is called via gldelf64ppc_finish. */
13185
13186 bfd_boolean
13187 ppc64_elf_build_stubs (struct bfd_link_info *info,
13188 char **stats)
13189 {
13190 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13191 struct map_stub *group;
13192 asection *stub_sec;
13193 bfd_byte *p;
13194 int stub_sec_count = 0;
13195
13196 if (htab == NULL)
13197 return FALSE;
13198
13199 /* Allocate memory to hold the linker stubs. */
13200 for (group = htab->group; group != NULL; group = group->next)
13201 if ((stub_sec = group->stub_sec) != NULL
13202 && stub_sec->size != 0)
13203 {
13204 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13205 if (stub_sec->contents == NULL)
13206 return FALSE;
13207 stub_sec->size = 0;
13208 }
13209
13210 if (htab->glink != NULL && htab->glink->size != 0)
13211 {
13212 unsigned int indx;
13213 bfd_vma plt0;
13214
13215 /* Build the .glink plt call stub. */
13216 if (htab->params->emit_stub_syms)
13217 {
13218 struct elf_link_hash_entry *h;
13219 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13220 TRUE, FALSE, FALSE);
13221 if (h == NULL)
13222 return FALSE;
13223 if (h->root.type == bfd_link_hash_new)
13224 {
13225 h->root.type = bfd_link_hash_defined;
13226 h->root.u.def.section = htab->glink;
13227 h->root.u.def.value = 8;
13228 h->ref_regular = 1;
13229 h->def_regular = 1;
13230 h->ref_regular_nonweak = 1;
13231 h->forced_local = 1;
13232 h->non_elf = 0;
13233 h->root.linker_def = 1;
13234 }
13235 }
13236 plt0 = (htab->elf.splt->output_section->vma
13237 + htab->elf.splt->output_offset
13238 - 16);
13239 if (info->emitrelocations)
13240 {
13241 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13242 if (r == NULL)
13243 return FALSE;
13244 r->r_offset = (htab->glink->output_offset
13245 + htab->glink->output_section->vma);
13246 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13247 r->r_addend = plt0;
13248 }
13249 p = htab->glink->contents;
13250 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13251 bfd_put_64 (htab->glink->owner, plt0, p);
13252 p += 8;
13253 if (htab->opd_abi)
13254 {
13255 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13256 p += 4;
13257 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13258 p += 4;
13259 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13260 p += 4;
13261 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13262 p += 4;
13263 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13264 p += 4;
13265 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13266 p += 4;
13267 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13268 p += 4;
13269 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13270 p += 4;
13271 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13272 p += 4;
13273 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13274 p += 4;
13275 }
13276 else
13277 {
13278 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13279 p += 4;
13280 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13281 p += 4;
13282 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13283 p += 4;
13284 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13285 p += 4;
13286 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13287 p += 4;
13288 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13289 p += 4;
13290 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13291 p += 4;
13292 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13293 p += 4;
13294 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13295 p += 4;
13296 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13297 p += 4;
13298 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13299 p += 4;
13300 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13301 p += 4;
13302 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13303 p += 4;
13304 }
13305 bfd_put_32 (htab->glink->owner, BCTR, p);
13306 p += 4;
13307 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13308 {
13309 bfd_put_32 (htab->glink->owner, NOP, p);
13310 p += 4;
13311 }
13312
13313 /* Build the .glink lazy link call stubs. */
13314 indx = 0;
13315 while (p < htab->glink->contents + htab->glink->rawsize)
13316 {
13317 if (htab->opd_abi)
13318 {
13319 if (indx < 0x8000)
13320 {
13321 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13322 p += 4;
13323 }
13324 else
13325 {
13326 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13327 p += 4;
13328 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13329 p);
13330 p += 4;
13331 }
13332 }
13333 bfd_put_32 (htab->glink->owner,
13334 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13335 indx++;
13336 p += 4;
13337 }
13338
13339 /* Build .glink global entry stubs. */
13340 if (htab->glink->size > htab->glink->rawsize)
13341 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13342 }
13343
13344 if (htab->brlt != NULL && htab->brlt->size != 0)
13345 {
13346 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13347 htab->brlt->size);
13348 if (htab->brlt->contents == NULL)
13349 return FALSE;
13350 }
13351 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13352 {
13353 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13354 htab->relbrlt->size);
13355 if (htab->relbrlt->contents == NULL)
13356 return FALSE;
13357 }
13358
13359 /* Build the stubs as directed by the stub hash table. */
13360 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13361
13362 for (group = htab->group; group != NULL; group = group->next)
13363 if (group->needs_save_res)
13364 {
13365 stub_sec = group->stub_sec;
13366 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13367 htab->sfpr->size);
13368 if (htab->params->emit_stub_syms)
13369 {
13370 unsigned int i;
13371
13372 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13373 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13374 return FALSE;
13375 }
13376 stub_sec->size += htab->sfpr->size;
13377 }
13378
13379 if (htab->relbrlt != NULL)
13380 htab->relbrlt->reloc_count = 0;
13381
13382 if (htab->params->plt_stub_align != 0)
13383 for (group = htab->group; group != NULL; group = group->next)
13384 if ((stub_sec = group->stub_sec) != NULL)
13385 stub_sec->size = ((stub_sec->size
13386 + (1 << htab->params->plt_stub_align) - 1)
13387 & -(1 << htab->params->plt_stub_align));
13388
13389 for (group = htab->group; group != NULL; group = group->next)
13390 if ((stub_sec = group->stub_sec) != NULL)
13391 {
13392 stub_sec_count += 1;
13393 if (stub_sec->rawsize != stub_sec->size
13394 && (htab->stub_iteration <= STUB_SHRINK_ITER
13395 || stub_sec->rawsize < stub_sec->size))
13396 break;
13397 }
13398
13399 /* Note that the glink_eh_frame check here is not only testing that
13400 the generated size matched the calculated size but also that
13401 bfd_elf_discard_info didn't make any changes to the section. */
13402 if (group != NULL
13403 || (htab->glink_eh_frame != NULL
13404 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13405 {
13406 htab->stub_error = TRUE;
13407 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13408 }
13409
13410 if (htab->stub_error)
13411 return FALSE;
13412
13413 if (stats != NULL)
13414 {
13415 *stats = bfd_malloc (500);
13416 if (*stats == NULL)
13417 return FALSE;
13418
13419 sprintf (*stats, _("linker stubs in %u group%s\n"
13420 " branch %lu\n"
13421 " toc adjust %lu\n"
13422 " long branch %lu\n"
13423 " long toc adj %lu\n"
13424 " plt call %lu\n"
13425 " plt call toc %lu\n"
13426 " global entry %lu"),
13427 stub_sec_count,
13428 stub_sec_count == 1 ? "" : "s",
13429 htab->stub_count[ppc_stub_long_branch - 1],
13430 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13431 htab->stub_count[ppc_stub_plt_branch - 1],
13432 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13433 htab->stub_count[ppc_stub_plt_call - 1],
13434 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13435 htab->stub_count[ppc_stub_global_entry - 1]);
13436 }
13437 return TRUE;
13438 }
13439
13440 /* What to do when ld finds relocations against symbols defined in
13441 discarded sections. */
13442
13443 static unsigned int
13444 ppc64_elf_action_discarded (asection *sec)
13445 {
13446 if (strcmp (".opd", sec->name) == 0)
13447 return 0;
13448
13449 if (strcmp (".toc", sec->name) == 0)
13450 return 0;
13451
13452 if (strcmp (".toc1", sec->name) == 0)
13453 return 0;
13454
13455 return _bfd_elf_default_action_discarded (sec);
13456 }
13457
13458 /* The RELOCATE_SECTION function is called by the ELF backend linker
13459 to handle the relocations for a section.
13460
13461 The relocs are always passed as Rela structures; if the section
13462 actually uses Rel structures, the r_addend field will always be
13463 zero.
13464
13465 This function is responsible for adjust the section contents as
13466 necessary, and (if using Rela relocs and generating a
13467 relocatable output file) adjusting the reloc addend as
13468 necessary.
13469
13470 This function does not have to worry about setting the reloc
13471 address or the reloc symbol index.
13472
13473 LOCAL_SYMS is a pointer to the swapped in local symbols.
13474
13475 LOCAL_SECTIONS is an array giving the section in the input file
13476 corresponding to the st_shndx field of each local symbol.
13477
13478 The global hash table entry for the global symbols can be found
13479 via elf_sym_hashes (input_bfd).
13480
13481 When generating relocatable output, this function must handle
13482 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13483 going to be the section symbol corresponding to the output
13484 section, which means that the addend must be adjusted
13485 accordingly. */
13486
13487 static bfd_boolean
13488 ppc64_elf_relocate_section (bfd *output_bfd,
13489 struct bfd_link_info *info,
13490 bfd *input_bfd,
13491 asection *input_section,
13492 bfd_byte *contents,
13493 Elf_Internal_Rela *relocs,
13494 Elf_Internal_Sym *local_syms,
13495 asection **local_sections)
13496 {
13497 struct ppc_link_hash_table *htab;
13498 Elf_Internal_Shdr *symtab_hdr;
13499 struct elf_link_hash_entry **sym_hashes;
13500 Elf_Internal_Rela *rel;
13501 Elf_Internal_Rela *wrel;
13502 Elf_Internal_Rela *relend;
13503 Elf_Internal_Rela outrel;
13504 bfd_byte *loc;
13505 struct got_entry **local_got_ents;
13506 bfd_vma TOCstart;
13507 bfd_boolean ret = TRUE;
13508 bfd_boolean is_opd;
13509 /* Assume 'at' branch hints. */
13510 bfd_boolean is_isa_v2 = TRUE;
13511 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13512
13513 /* Initialize howto table if needed. */
13514 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13515 ppc_howto_init ();
13516
13517 htab = ppc_hash_table (info);
13518 if (htab == NULL)
13519 return FALSE;
13520
13521 /* Don't relocate stub sections. */
13522 if (input_section->owner == htab->params->stub_bfd)
13523 return TRUE;
13524
13525 BFD_ASSERT (is_ppc64_elf (input_bfd));
13526
13527 local_got_ents = elf_local_got_ents (input_bfd);
13528 TOCstart = elf_gp (output_bfd);
13529 symtab_hdr = &elf_symtab_hdr (input_bfd);
13530 sym_hashes = elf_sym_hashes (input_bfd);
13531 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13532
13533 rel = wrel = relocs;
13534 relend = relocs + input_section->reloc_count;
13535 for (; rel < relend; wrel++, rel++)
13536 {
13537 enum elf_ppc64_reloc_type r_type;
13538 bfd_vma addend;
13539 bfd_reloc_status_type r;
13540 Elf_Internal_Sym *sym;
13541 asection *sec;
13542 struct elf_link_hash_entry *h_elf;
13543 struct ppc_link_hash_entry *h;
13544 struct ppc_link_hash_entry *fdh;
13545 const char *sym_name;
13546 unsigned long r_symndx, toc_symndx;
13547 bfd_vma toc_addend;
13548 unsigned char tls_mask, tls_gd, tls_type;
13549 unsigned char sym_type;
13550 bfd_vma relocation;
13551 bfd_boolean unresolved_reloc;
13552 bfd_boolean warned;
13553 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13554 unsigned int insn;
13555 unsigned int mask;
13556 struct ppc_stub_hash_entry *stub_entry;
13557 bfd_vma max_br_offset;
13558 bfd_vma from;
13559 Elf_Internal_Rela orig_rel;
13560 reloc_howto_type *howto;
13561 struct reloc_howto_struct alt_howto;
13562
13563 again:
13564 orig_rel = *rel;
13565
13566 r_type = ELF64_R_TYPE (rel->r_info);
13567 r_symndx = ELF64_R_SYM (rel->r_info);
13568
13569 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13570 symbol of the previous ADDR64 reloc. The symbol gives us the
13571 proper TOC base to use. */
13572 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13573 && wrel != relocs
13574 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13575 && is_opd)
13576 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13577
13578 sym = NULL;
13579 sec = NULL;
13580 h_elf = NULL;
13581 sym_name = NULL;
13582 unresolved_reloc = FALSE;
13583 warned = FALSE;
13584
13585 if (r_symndx < symtab_hdr->sh_info)
13586 {
13587 /* It's a local symbol. */
13588 struct _opd_sec_data *opd;
13589
13590 sym = local_syms + r_symndx;
13591 sec = local_sections[r_symndx];
13592 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13593 sym_type = ELF64_ST_TYPE (sym->st_info);
13594 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13595 opd = get_opd_info (sec);
13596 if (opd != NULL && opd->adjust != NULL)
13597 {
13598 long adjust = opd->adjust[OPD_NDX (sym->st_value
13599 + rel->r_addend)];
13600 if (adjust == -1)
13601 relocation = 0;
13602 else
13603 {
13604 /* If this is a relocation against the opd section sym
13605 and we have edited .opd, adjust the reloc addend so
13606 that ld -r and ld --emit-relocs output is correct.
13607 If it is a reloc against some other .opd symbol,
13608 then the symbol value will be adjusted later. */
13609 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13610 rel->r_addend += adjust;
13611 else
13612 relocation += adjust;
13613 }
13614 }
13615 }
13616 else
13617 {
13618 bfd_boolean ignored;
13619
13620 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13621 r_symndx, symtab_hdr, sym_hashes,
13622 h_elf, sec, relocation,
13623 unresolved_reloc, warned, ignored);
13624 sym_name = h_elf->root.root.string;
13625 sym_type = h_elf->type;
13626 if (sec != NULL
13627 && sec->owner == output_bfd
13628 && strcmp (sec->name, ".opd") == 0)
13629 {
13630 /* This is a symbol defined in a linker script. All
13631 such are defined in output sections, even those
13632 defined by simple assignment from a symbol defined in
13633 an input section. Transfer the symbol to an
13634 appropriate input .opd section, so that a branch to
13635 this symbol will be mapped to the location specified
13636 by the opd entry. */
13637 struct bfd_link_order *lo;
13638 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13639 if (lo->type == bfd_indirect_link_order)
13640 {
13641 asection *isec = lo->u.indirect.section;
13642 if (h_elf->root.u.def.value >= isec->output_offset
13643 && h_elf->root.u.def.value < (isec->output_offset
13644 + isec->size))
13645 {
13646 h_elf->root.u.def.value -= isec->output_offset;
13647 h_elf->root.u.def.section = isec;
13648 sec = isec;
13649 break;
13650 }
13651 }
13652 }
13653 }
13654 h = (struct ppc_link_hash_entry *) h_elf;
13655
13656 if (sec != NULL && discarded_section (sec))
13657 {
13658 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13659 input_bfd, input_section,
13660 contents + rel->r_offset);
13661 wrel->r_offset = rel->r_offset;
13662 wrel->r_info = 0;
13663 wrel->r_addend = 0;
13664
13665 /* For ld -r, remove relocations in debug sections against
13666 sections defined in discarded sections. Not done for
13667 non-debug to preserve relocs in .eh_frame which the
13668 eh_frame editing code expects to be present. */
13669 if (bfd_link_relocatable (info)
13670 && (input_section->flags & SEC_DEBUGGING))
13671 wrel--;
13672
13673 continue;
13674 }
13675
13676 if (bfd_link_relocatable (info))
13677 goto copy_reloc;
13678
13679 if (h != NULL && &h->elf == htab->elf.hgot)
13680 {
13681 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13682 sec = bfd_abs_section_ptr;
13683 unresolved_reloc = FALSE;
13684 }
13685
13686 /* TLS optimizations. Replace instruction sequences and relocs
13687 based on information we collected in tls_optimize. We edit
13688 RELOCS so that --emit-relocs will output something sensible
13689 for the final instruction stream. */
13690 tls_mask = 0;
13691 tls_gd = 0;
13692 toc_symndx = 0;
13693 if (h != NULL)
13694 tls_mask = h->tls_mask;
13695 else if (local_got_ents != NULL)
13696 {
13697 struct plt_entry **local_plt = (struct plt_entry **)
13698 (local_got_ents + symtab_hdr->sh_info);
13699 unsigned char *lgot_masks = (unsigned char *)
13700 (local_plt + symtab_hdr->sh_info);
13701 tls_mask = lgot_masks[r_symndx];
13702 }
13703 if (tls_mask == 0
13704 && (r_type == R_PPC64_TLS
13705 || r_type == R_PPC64_TLSGD
13706 || r_type == R_PPC64_TLSLD))
13707 {
13708 /* Check for toc tls entries. */
13709 unsigned char *toc_tls;
13710
13711 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13712 &local_syms, rel, input_bfd))
13713 return FALSE;
13714
13715 if (toc_tls)
13716 tls_mask = *toc_tls;
13717 }
13718
13719 /* Check that tls relocs are used with tls syms, and non-tls
13720 relocs are used with non-tls syms. */
13721 if (r_symndx != STN_UNDEF
13722 && r_type != R_PPC64_NONE
13723 && (h == NULL
13724 || h->elf.root.type == bfd_link_hash_defined
13725 || h->elf.root.type == bfd_link_hash_defweak)
13726 && (IS_PPC64_TLS_RELOC (r_type)
13727 != (sym_type == STT_TLS
13728 || (sym_type == STT_SECTION
13729 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13730 {
13731 if (tls_mask != 0
13732 && (r_type == R_PPC64_TLS
13733 || r_type == R_PPC64_TLSGD
13734 || r_type == R_PPC64_TLSLD))
13735 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13736 ;
13737 else
13738 info->callbacks->einfo
13739 (!IS_PPC64_TLS_RELOC (r_type)
13740 /* xgettext:c-format */
13741 ? _("%H: %s used with TLS symbol `%T'\n")
13742 /* xgettext:c-format */
13743 : _("%H: %s used with non-TLS symbol `%T'\n"),
13744 input_bfd, input_section, rel->r_offset,
13745 ppc64_elf_howto_table[r_type]->name,
13746 sym_name);
13747 }
13748
13749 /* Ensure reloc mapping code below stays sane. */
13750 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13751 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13752 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13753 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13754 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13755 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13756 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13757 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13758 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13759 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13760 abort ();
13761
13762 switch (r_type)
13763 {
13764 default:
13765 break;
13766
13767 case R_PPC64_LO_DS_OPT:
13768 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13769 if ((insn & (0x3f << 26)) != 58u << 26)
13770 abort ();
13771 insn += (14u << 26) - (58u << 26);
13772 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13773 r_type = R_PPC64_TOC16_LO;
13774 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13775 break;
13776
13777 case R_PPC64_TOC16:
13778 case R_PPC64_TOC16_LO:
13779 case R_PPC64_TOC16_DS:
13780 case R_PPC64_TOC16_LO_DS:
13781 {
13782 /* Check for toc tls entries. */
13783 unsigned char *toc_tls;
13784 int retval;
13785
13786 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13787 &local_syms, rel, input_bfd);
13788 if (retval == 0)
13789 return FALSE;
13790
13791 if (toc_tls)
13792 {
13793 tls_mask = *toc_tls;
13794 if (r_type == R_PPC64_TOC16_DS
13795 || r_type == R_PPC64_TOC16_LO_DS)
13796 {
13797 if (tls_mask != 0
13798 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13799 goto toctprel;
13800 }
13801 else
13802 {
13803 /* If we found a GD reloc pair, then we might be
13804 doing a GD->IE transition. */
13805 if (retval == 2)
13806 {
13807 tls_gd = TLS_TPRELGD;
13808 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13809 goto tls_ldgd_opt;
13810 }
13811 else if (retval == 3)
13812 {
13813 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13814 goto tls_ldgd_opt;
13815 }
13816 }
13817 }
13818 }
13819 break;
13820
13821 case R_PPC64_GOT_TPREL16_HI:
13822 case R_PPC64_GOT_TPREL16_HA:
13823 if (tls_mask != 0
13824 && (tls_mask & TLS_TPREL) == 0)
13825 {
13826 rel->r_offset -= d_offset;
13827 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13828 r_type = R_PPC64_NONE;
13829 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13830 }
13831 break;
13832
13833 case R_PPC64_GOT_TPREL16_DS:
13834 case R_PPC64_GOT_TPREL16_LO_DS:
13835 if (tls_mask != 0
13836 && (tls_mask & TLS_TPREL) == 0)
13837 {
13838 toctprel:
13839 insn = bfd_get_32 (input_bfd,
13840 contents + rel->r_offset - d_offset);
13841 insn &= 31 << 21;
13842 insn |= 0x3c0d0000; /* addis 0,13,0 */
13843 bfd_put_32 (input_bfd, insn,
13844 contents + rel->r_offset - d_offset);
13845 r_type = R_PPC64_TPREL16_HA;
13846 if (toc_symndx != 0)
13847 {
13848 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13849 rel->r_addend = toc_addend;
13850 /* We changed the symbol. Start over in order to
13851 get h, sym, sec etc. right. */
13852 goto again;
13853 }
13854 else
13855 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13856 }
13857 break;
13858
13859 case R_PPC64_TLS:
13860 if (tls_mask != 0
13861 && (tls_mask & TLS_TPREL) == 0)
13862 {
13863 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13864 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13865 if (insn == 0)
13866 abort ();
13867 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13868 /* Was PPC64_TLS which sits on insn boundary, now
13869 PPC64_TPREL16_LO which is at low-order half-word. */
13870 rel->r_offset += d_offset;
13871 r_type = R_PPC64_TPREL16_LO;
13872 if (toc_symndx != 0)
13873 {
13874 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13875 rel->r_addend = toc_addend;
13876 /* We changed the symbol. Start over in order to
13877 get h, sym, sec etc. right. */
13878 goto again;
13879 }
13880 else
13881 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13882 }
13883 break;
13884
13885 case R_PPC64_GOT_TLSGD16_HI:
13886 case R_PPC64_GOT_TLSGD16_HA:
13887 tls_gd = TLS_TPRELGD;
13888 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13889 goto tls_gdld_hi;
13890 break;
13891
13892 case R_PPC64_GOT_TLSLD16_HI:
13893 case R_PPC64_GOT_TLSLD16_HA:
13894 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13895 {
13896 tls_gdld_hi:
13897 if ((tls_mask & tls_gd) != 0)
13898 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13899 + R_PPC64_GOT_TPREL16_DS);
13900 else
13901 {
13902 rel->r_offset -= d_offset;
13903 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13904 r_type = R_PPC64_NONE;
13905 }
13906 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13907 }
13908 break;
13909
13910 case R_PPC64_GOT_TLSGD16:
13911 case R_PPC64_GOT_TLSGD16_LO:
13912 tls_gd = TLS_TPRELGD;
13913 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13914 goto tls_ldgd_opt;
13915 break;
13916
13917 case R_PPC64_GOT_TLSLD16:
13918 case R_PPC64_GOT_TLSLD16_LO:
13919 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13920 {
13921 unsigned int insn1, insn2, insn3;
13922 bfd_vma offset;
13923
13924 tls_ldgd_opt:
13925 offset = (bfd_vma) -1;
13926 /* If not using the newer R_PPC64_TLSGD/LD to mark
13927 __tls_get_addr calls, we must trust that the call
13928 stays with its arg setup insns, ie. that the next
13929 reloc is the __tls_get_addr call associated with
13930 the current reloc. Edit both insns. */
13931 if (input_section->has_tls_get_addr_call
13932 && rel + 1 < relend
13933 && branch_reloc_hash_match (input_bfd, rel + 1,
13934 htab->tls_get_addr,
13935 htab->tls_get_addr_fd))
13936 offset = rel[1].r_offset;
13937 /* We read the low GOT_TLS (or TOC16) insn because we
13938 need to keep the destination reg. It may be
13939 something other than the usual r3, and moved to r3
13940 before the call by intervening code. */
13941 insn1 = bfd_get_32 (input_bfd,
13942 contents + rel->r_offset - d_offset);
13943 if ((tls_mask & tls_gd) != 0)
13944 {
13945 /* IE */
13946 insn1 &= (0x1f << 21) | (0x1f << 16);
13947 insn1 |= 58 << 26; /* ld */
13948 insn2 = 0x7c636a14; /* add 3,3,13 */
13949 if (offset != (bfd_vma) -1)
13950 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13951 if ((tls_mask & TLS_EXPLICIT) == 0)
13952 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13953 + R_PPC64_GOT_TPREL16_DS);
13954 else
13955 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13956 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13957 }
13958 else
13959 {
13960 /* LE */
13961 insn1 &= 0x1f << 21;
13962 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13963 insn2 = 0x38630000; /* addi 3,3,0 */
13964 if (tls_gd == 0)
13965 {
13966 /* Was an LD reloc. */
13967 if (toc_symndx)
13968 sec = local_sections[toc_symndx];
13969 for (r_symndx = 0;
13970 r_symndx < symtab_hdr->sh_info;
13971 r_symndx++)
13972 if (local_sections[r_symndx] == sec)
13973 break;
13974 if (r_symndx >= symtab_hdr->sh_info)
13975 r_symndx = STN_UNDEF;
13976 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13977 if (r_symndx != STN_UNDEF)
13978 rel->r_addend -= (local_syms[r_symndx].st_value
13979 + sec->output_offset
13980 + sec->output_section->vma);
13981 }
13982 else if (toc_symndx != 0)
13983 {
13984 r_symndx = toc_symndx;
13985 rel->r_addend = toc_addend;
13986 }
13987 r_type = R_PPC64_TPREL16_HA;
13988 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13989 if (offset != (bfd_vma) -1)
13990 {
13991 rel[1].r_info = ELF64_R_INFO (r_symndx,
13992 R_PPC64_TPREL16_LO);
13993 rel[1].r_offset = offset + d_offset;
13994 rel[1].r_addend = rel->r_addend;
13995 }
13996 }
13997 bfd_put_32 (input_bfd, insn1,
13998 contents + rel->r_offset - d_offset);
13999 if (offset != (bfd_vma) -1)
14000 {
14001 insn3 = bfd_get_32 (input_bfd,
14002 contents + offset + 4);
14003 if (insn3 == NOP
14004 || insn3 == CROR_151515 || insn3 == CROR_313131)
14005 {
14006 rel[1].r_offset += 4;
14007 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
14008 insn2 = NOP;
14009 }
14010 bfd_put_32 (input_bfd, insn2, contents + offset);
14011 }
14012 if ((tls_mask & tls_gd) == 0
14013 && (tls_gd == 0 || toc_symndx != 0))
14014 {
14015 /* We changed the symbol. Start over in order
14016 to get h, sym, sec etc. right. */
14017 goto again;
14018 }
14019 }
14020 break;
14021
14022 case R_PPC64_TLSGD:
14023 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
14024 {
14025 unsigned int insn2, insn3;
14026 bfd_vma offset = rel->r_offset;
14027
14028 if ((tls_mask & TLS_TPRELGD) != 0)
14029 {
14030 /* IE */
14031 r_type = R_PPC64_NONE;
14032 insn2 = 0x7c636a14; /* add 3,3,13 */
14033 }
14034 else
14035 {
14036 /* LE */
14037 if (toc_symndx != 0)
14038 {
14039 r_symndx = toc_symndx;
14040 rel->r_addend = toc_addend;
14041 }
14042 r_type = R_PPC64_TPREL16_LO;
14043 rel->r_offset = offset + d_offset;
14044 insn2 = 0x38630000; /* addi 3,3,0 */
14045 }
14046 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14047 /* Zap the reloc on the _tls_get_addr call too. */
14048 BFD_ASSERT (offset == rel[1].r_offset);
14049 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14050 insn3 = bfd_get_32 (input_bfd,
14051 contents + offset + 4);
14052 if (insn3 == NOP
14053 || insn3 == CROR_151515 || insn3 == CROR_313131)
14054 {
14055 rel->r_offset += 4;
14056 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
14057 insn2 = NOP;
14058 }
14059 bfd_put_32 (input_bfd, insn2, contents + offset);
14060 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14061 goto again;
14062 }
14063 break;
14064
14065 case R_PPC64_TLSLD:
14066 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
14067 {
14068 unsigned int insn2, insn3;
14069 bfd_vma offset = rel->r_offset;
14070
14071 if (toc_symndx)
14072 sec = local_sections[toc_symndx];
14073 for (r_symndx = 0;
14074 r_symndx < symtab_hdr->sh_info;
14075 r_symndx++)
14076 if (local_sections[r_symndx] == sec)
14077 break;
14078 if (r_symndx >= symtab_hdr->sh_info)
14079 r_symndx = STN_UNDEF;
14080 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14081 if (r_symndx != STN_UNDEF)
14082 rel->r_addend -= (local_syms[r_symndx].st_value
14083 + sec->output_offset
14084 + sec->output_section->vma);
14085
14086 r_type = R_PPC64_TPREL16_LO;
14087 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14088 rel->r_offset = offset + d_offset;
14089 /* Zap the reloc on the _tls_get_addr call too. */
14090 BFD_ASSERT (offset == rel[1].r_offset);
14091 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14092 insn2 = 0x38630000; /* addi 3,3,0 */
14093 insn3 = bfd_get_32 (input_bfd,
14094 contents + offset + 4);
14095 if (insn3 == NOP
14096 || insn3 == CROR_151515 || insn3 == CROR_313131)
14097 {
14098 rel->r_offset += 4;
14099 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
14100 insn2 = NOP;
14101 }
14102 bfd_put_32 (input_bfd, insn2, contents + offset);
14103 goto again;
14104 }
14105 break;
14106
14107 case R_PPC64_DTPMOD64:
14108 if (rel + 1 < relend
14109 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14110 && rel[1].r_offset == rel->r_offset + 8)
14111 {
14112 if ((tls_mask & TLS_GD) == 0)
14113 {
14114 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14115 if ((tls_mask & TLS_TPRELGD) != 0)
14116 r_type = R_PPC64_TPREL64;
14117 else
14118 {
14119 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14120 r_type = R_PPC64_NONE;
14121 }
14122 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14123 }
14124 }
14125 else
14126 {
14127 if ((tls_mask & TLS_LD) == 0)
14128 {
14129 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14130 r_type = R_PPC64_NONE;
14131 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14132 }
14133 }
14134 break;
14135
14136 case R_PPC64_TPREL64:
14137 if ((tls_mask & TLS_TPREL) == 0)
14138 {
14139 r_type = R_PPC64_NONE;
14140 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14141 }
14142 break;
14143
14144 case R_PPC64_ENTRY:
14145 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14146 if (!bfd_link_pic (info)
14147 && !info->traditional_format
14148 && relocation + 0x80008000 <= 0xffffffff)
14149 {
14150 unsigned int insn1, insn2;
14151
14152 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14153 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14154 if ((insn1 & ~0xfffc) == LD_R2_0R12
14155 && insn2 == ADD_R2_R2_R12)
14156 {
14157 bfd_put_32 (input_bfd,
14158 LIS_R2 + PPC_HA (relocation),
14159 contents + rel->r_offset);
14160 bfd_put_32 (input_bfd,
14161 ADDI_R2_R2 + PPC_LO (relocation),
14162 contents + rel->r_offset + 4);
14163 }
14164 }
14165 else
14166 {
14167 relocation -= (rel->r_offset
14168 + input_section->output_offset
14169 + input_section->output_section->vma);
14170 if (relocation + 0x80008000 <= 0xffffffff)
14171 {
14172 unsigned int insn1, insn2;
14173
14174 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14175 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14176 if ((insn1 & ~0xfffc) == LD_R2_0R12
14177 && insn2 == ADD_R2_R2_R12)
14178 {
14179 bfd_put_32 (input_bfd,
14180 ADDIS_R2_R12 + PPC_HA (relocation),
14181 contents + rel->r_offset);
14182 bfd_put_32 (input_bfd,
14183 ADDI_R2_R2 + PPC_LO (relocation),
14184 contents + rel->r_offset + 4);
14185 }
14186 }
14187 }
14188 break;
14189
14190 case R_PPC64_REL16_HA:
14191 /* If we are generating a non-PIC executable, edit
14192 . 0: addis 2,12,.TOC.-0b@ha
14193 . addi 2,2,.TOC.-0b@l
14194 used by ELFv2 global entry points to set up r2, to
14195 . lis 2,.TOC.@ha
14196 . addi 2,2,.TOC.@l
14197 if .TOC. is in range. */
14198 if (!bfd_link_pic (info)
14199 && !info->traditional_format
14200 && !htab->opd_abi
14201 && rel->r_addend == d_offset
14202 && h != NULL && &h->elf == htab->elf.hgot
14203 && rel + 1 < relend
14204 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14205 && rel[1].r_offset == rel->r_offset + 4
14206 && rel[1].r_addend == rel->r_addend + 4
14207 && relocation + 0x80008000 <= 0xffffffff)
14208 {
14209 unsigned int insn1, insn2;
14210 bfd_vma offset = rel->r_offset - d_offset;
14211 insn1 = bfd_get_32 (input_bfd, contents + offset);
14212 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14213 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14214 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14215 {
14216 r_type = R_PPC64_ADDR16_HA;
14217 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14218 rel->r_addend -= d_offset;
14219 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14220 rel[1].r_addend -= d_offset + 4;
14221 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14222 }
14223 }
14224 break;
14225 }
14226
14227 /* Handle other relocations that tweak non-addend part of insn. */
14228 insn = 0;
14229 max_br_offset = 1 << 25;
14230 addend = rel->r_addend;
14231 reloc_dest = DEST_NORMAL;
14232 switch (r_type)
14233 {
14234 default:
14235 break;
14236
14237 case R_PPC64_TOCSAVE:
14238 if (relocation + addend == (rel->r_offset
14239 + input_section->output_offset
14240 + input_section->output_section->vma)
14241 && tocsave_find (htab, NO_INSERT,
14242 &local_syms, rel, input_bfd))
14243 {
14244 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14245 if (insn == NOP
14246 || insn == CROR_151515 || insn == CROR_313131)
14247 bfd_put_32 (input_bfd,
14248 STD_R2_0R1 + STK_TOC (htab),
14249 contents + rel->r_offset);
14250 }
14251 break;
14252
14253 /* Branch taken prediction relocations. */
14254 case R_PPC64_ADDR14_BRTAKEN:
14255 case R_PPC64_REL14_BRTAKEN:
14256 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14257 /* Fall through. */
14258
14259 /* Branch not taken prediction relocations. */
14260 case R_PPC64_ADDR14_BRNTAKEN:
14261 case R_PPC64_REL14_BRNTAKEN:
14262 insn |= bfd_get_32 (input_bfd,
14263 contents + rel->r_offset) & ~(0x01 << 21);
14264 /* Fall through. */
14265
14266 case R_PPC64_REL14:
14267 max_br_offset = 1 << 15;
14268 /* Fall through. */
14269
14270 case R_PPC64_REL24:
14271 /* Calls to functions with a different TOC, such as calls to
14272 shared objects, need to alter the TOC pointer. This is
14273 done using a linkage stub. A REL24 branching to these
14274 linkage stubs needs to be followed by a nop, as the nop
14275 will be replaced with an instruction to restore the TOC
14276 base pointer. */
14277 fdh = h;
14278 if (h != NULL
14279 && h->oh != NULL
14280 && h->oh->is_func_descriptor)
14281 fdh = ppc_follow_link (h->oh);
14282 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14283 htab);
14284 if (stub_entry != NULL
14285 && (stub_entry->stub_type == ppc_stub_plt_call
14286 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14287 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14288 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14289 {
14290 bfd_boolean can_plt_call = FALSE;
14291
14292 if (stub_entry->stub_type == ppc_stub_plt_call
14293 && !htab->opd_abi
14294 && htab->params->plt_localentry0 != 0
14295 && is_elfv2_localentry0 (&h->elf))
14296 {
14297 /* The function doesn't use or change r2. */
14298 can_plt_call = TRUE;
14299 }
14300
14301 /* All of these stubs may modify r2, so there must be a
14302 branch and link followed by a nop. The nop is
14303 replaced by an insn to restore r2. */
14304 else if (rel->r_offset + 8 <= input_section->size)
14305 {
14306 unsigned long br;
14307
14308 br = bfd_get_32 (input_bfd,
14309 contents + rel->r_offset);
14310 if ((br & 1) != 0)
14311 {
14312 unsigned long nop;
14313
14314 nop = bfd_get_32 (input_bfd,
14315 contents + rel->r_offset + 4);
14316 if (nop == NOP
14317 || nop == CROR_151515 || nop == CROR_313131)
14318 {
14319 if (h != NULL
14320 && (h == htab->tls_get_addr_fd
14321 || h == htab->tls_get_addr)
14322 && htab->params->tls_get_addr_opt)
14323 {
14324 /* Special stub used, leave nop alone. */
14325 }
14326 else
14327 bfd_put_32 (input_bfd,
14328 LD_R2_0R1 + STK_TOC (htab),
14329 contents + rel->r_offset + 4);
14330 can_plt_call = TRUE;
14331 }
14332 }
14333 }
14334
14335 if (!can_plt_call && h != NULL)
14336 {
14337 const char *name = h->elf.root.root.string;
14338
14339 if (*name == '.')
14340 ++name;
14341
14342 if (strncmp (name, "__libc_start_main", 17) == 0
14343 && (name[17] == 0 || name[17] == '@'))
14344 {
14345 /* Allow crt1 branch to go via a toc adjusting
14346 stub. Other calls that never return could do
14347 the same, if we could detect such. */
14348 can_plt_call = TRUE;
14349 }
14350 }
14351
14352 if (!can_plt_call)
14353 {
14354 /* g++ as of 20130507 emits self-calls without a
14355 following nop. This is arguably wrong since we
14356 have conflicting information. On the one hand a
14357 global symbol and on the other a local call
14358 sequence, but don't error for this special case.
14359 It isn't possible to cheaply verify we have
14360 exactly such a call. Allow all calls to the same
14361 section. */
14362 asection *code_sec = sec;
14363
14364 if (get_opd_info (sec) != NULL)
14365 {
14366 bfd_vma off = (relocation + addend
14367 - sec->output_section->vma
14368 - sec->output_offset);
14369
14370 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14371 }
14372 if (code_sec == input_section)
14373 can_plt_call = TRUE;
14374 }
14375
14376 if (!can_plt_call)
14377 {
14378 if (stub_entry->stub_type == ppc_stub_plt_call
14379 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14380 info->callbacks->einfo
14381 /* xgettext:c-format */
14382 (_("%H: call to `%T' lacks nop, can't restore toc; "
14383 "recompile with -fPIC\n"),
14384 input_bfd, input_section, rel->r_offset, sym_name);
14385 else
14386 info->callbacks->einfo
14387 /* xgettext:c-format */
14388 (_("%H: call to `%T' lacks nop, can't restore toc; "
14389 "(-mcmodel=small toc adjust stub)\n"),
14390 input_bfd, input_section, rel->r_offset, sym_name);
14391
14392 bfd_set_error (bfd_error_bad_value);
14393 ret = FALSE;
14394 }
14395
14396 if (can_plt_call
14397 && (stub_entry->stub_type == ppc_stub_plt_call
14398 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14399 unresolved_reloc = FALSE;
14400 }
14401
14402 if ((stub_entry == NULL
14403 || stub_entry->stub_type == ppc_stub_long_branch
14404 || stub_entry->stub_type == ppc_stub_plt_branch)
14405 && get_opd_info (sec) != NULL)
14406 {
14407 /* The branch destination is the value of the opd entry. */
14408 bfd_vma off = (relocation + addend
14409 - sec->output_section->vma
14410 - sec->output_offset);
14411 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14412 if (dest != (bfd_vma) -1)
14413 {
14414 relocation = dest;
14415 addend = 0;
14416 reloc_dest = DEST_OPD;
14417 }
14418 }
14419
14420 /* If the branch is out of reach we ought to have a long
14421 branch stub. */
14422 from = (rel->r_offset
14423 + input_section->output_offset
14424 + input_section->output_section->vma);
14425
14426 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14427 ? fdh->elf.other
14428 : sym->st_other);
14429
14430 if (stub_entry != NULL
14431 && (stub_entry->stub_type == ppc_stub_long_branch
14432 || stub_entry->stub_type == ppc_stub_plt_branch)
14433 && (r_type == R_PPC64_ADDR14_BRTAKEN
14434 || r_type == R_PPC64_ADDR14_BRNTAKEN
14435 || (relocation + addend - from + max_br_offset
14436 < 2 * max_br_offset)))
14437 /* Don't use the stub if this branch is in range. */
14438 stub_entry = NULL;
14439
14440 if (stub_entry != NULL)
14441 {
14442 /* Munge up the value and addend so that we call the stub
14443 rather than the procedure directly. */
14444 asection *stub_sec = stub_entry->group->stub_sec;
14445
14446 if (stub_entry->stub_type == ppc_stub_save_res)
14447 relocation += (stub_sec->output_offset
14448 + stub_sec->output_section->vma
14449 + stub_sec->size - htab->sfpr->size
14450 - htab->sfpr->output_offset
14451 - htab->sfpr->output_section->vma);
14452 else
14453 relocation = (stub_entry->stub_offset
14454 + stub_sec->output_offset
14455 + stub_sec->output_section->vma);
14456 addend = 0;
14457 reloc_dest = DEST_STUB;
14458
14459 if ((stub_entry->stub_type == ppc_stub_plt_call
14460 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14461 && (ALWAYS_EMIT_R2SAVE
14462 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14463 && rel + 1 < relend
14464 && rel[1].r_offset == rel->r_offset + 4
14465 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14466 relocation += 4;
14467 }
14468
14469 if (insn != 0)
14470 {
14471 if (is_isa_v2)
14472 {
14473 /* Set 'a' bit. This is 0b00010 in BO field for branch
14474 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14475 for branch on CTR insns (BO == 1a00t or 1a01t). */
14476 if ((insn & (0x14 << 21)) == (0x04 << 21))
14477 insn |= 0x02 << 21;
14478 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14479 insn |= 0x08 << 21;
14480 else
14481 break;
14482 }
14483 else
14484 {
14485 /* Invert 'y' bit if not the default. */
14486 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14487 insn ^= 0x01 << 21;
14488 }
14489
14490 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14491 }
14492
14493 /* NOP out calls to undefined weak functions.
14494 We can thus call a weak function without first
14495 checking whether the function is defined. */
14496 else if (h != NULL
14497 && h->elf.root.type == bfd_link_hash_undefweak
14498 && h->elf.dynindx == -1
14499 && r_type == R_PPC64_REL24
14500 && relocation == 0
14501 && addend == 0)
14502 {
14503 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14504 goto copy_reloc;
14505 }
14506 break;
14507 }
14508
14509 /* Set `addend'. */
14510 tls_type = 0;
14511 switch (r_type)
14512 {
14513 default:
14514 info->callbacks->einfo
14515 /* xgettext:c-format */
14516 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14517 input_bfd, (int) r_type, sym_name);
14518
14519 bfd_set_error (bfd_error_bad_value);
14520 ret = FALSE;
14521 goto copy_reloc;
14522
14523 case R_PPC64_NONE:
14524 case R_PPC64_TLS:
14525 case R_PPC64_TLSGD:
14526 case R_PPC64_TLSLD:
14527 case R_PPC64_TOCSAVE:
14528 case R_PPC64_GNU_VTINHERIT:
14529 case R_PPC64_GNU_VTENTRY:
14530 case R_PPC64_ENTRY:
14531 goto copy_reloc;
14532
14533 /* GOT16 relocations. Like an ADDR16 using the symbol's
14534 address in the GOT as relocation value instead of the
14535 symbol's value itself. Also, create a GOT entry for the
14536 symbol and put the symbol value there. */
14537 case R_PPC64_GOT_TLSGD16:
14538 case R_PPC64_GOT_TLSGD16_LO:
14539 case R_PPC64_GOT_TLSGD16_HI:
14540 case R_PPC64_GOT_TLSGD16_HA:
14541 tls_type = TLS_TLS | TLS_GD;
14542 goto dogot;
14543
14544 case R_PPC64_GOT_TLSLD16:
14545 case R_PPC64_GOT_TLSLD16_LO:
14546 case R_PPC64_GOT_TLSLD16_HI:
14547 case R_PPC64_GOT_TLSLD16_HA:
14548 tls_type = TLS_TLS | TLS_LD;
14549 goto dogot;
14550
14551 case R_PPC64_GOT_TPREL16_DS:
14552 case R_PPC64_GOT_TPREL16_LO_DS:
14553 case R_PPC64_GOT_TPREL16_HI:
14554 case R_PPC64_GOT_TPREL16_HA:
14555 tls_type = TLS_TLS | TLS_TPREL;
14556 goto dogot;
14557
14558 case R_PPC64_GOT_DTPREL16_DS:
14559 case R_PPC64_GOT_DTPREL16_LO_DS:
14560 case R_PPC64_GOT_DTPREL16_HI:
14561 case R_PPC64_GOT_DTPREL16_HA:
14562 tls_type = TLS_TLS | TLS_DTPREL;
14563 goto dogot;
14564
14565 case R_PPC64_GOT16:
14566 case R_PPC64_GOT16_LO:
14567 case R_PPC64_GOT16_HI:
14568 case R_PPC64_GOT16_HA:
14569 case R_PPC64_GOT16_DS:
14570 case R_PPC64_GOT16_LO_DS:
14571 dogot:
14572 {
14573 /* Relocation is to the entry for this symbol in the global
14574 offset table. */
14575 asection *got;
14576 bfd_vma *offp;
14577 bfd_vma off;
14578 unsigned long indx = 0;
14579 struct got_entry *ent;
14580
14581 if (tls_type == (TLS_TLS | TLS_LD)
14582 && (h == NULL
14583 || !h->elf.def_dynamic))
14584 ent = ppc64_tlsld_got (input_bfd);
14585 else
14586 {
14587 if (h != NULL)
14588 {
14589 if (!htab->elf.dynamic_sections_created
14590 || h->elf.dynindx == -1
14591 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14592 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14593 /* This is actually a static link, or it is a
14594 -Bsymbolic link and the symbol is defined
14595 locally, or the symbol was forced to be local
14596 because of a version file. */
14597 ;
14598 else
14599 {
14600 indx = h->elf.dynindx;
14601 unresolved_reloc = FALSE;
14602 }
14603 ent = h->elf.got.glist;
14604 }
14605 else
14606 {
14607 if (local_got_ents == NULL)
14608 abort ();
14609 ent = local_got_ents[r_symndx];
14610 }
14611
14612 for (; ent != NULL; ent = ent->next)
14613 if (ent->addend == orig_rel.r_addend
14614 && ent->owner == input_bfd
14615 && ent->tls_type == tls_type)
14616 break;
14617 }
14618
14619 if (ent == NULL)
14620 abort ();
14621 if (ent->is_indirect)
14622 ent = ent->got.ent;
14623 offp = &ent->got.offset;
14624 got = ppc64_elf_tdata (ent->owner)->got;
14625 if (got == NULL)
14626 abort ();
14627
14628 /* The offset must always be a multiple of 8. We use the
14629 least significant bit to record whether we have already
14630 processed this entry. */
14631 off = *offp;
14632 if ((off & 1) != 0)
14633 off &= ~1;
14634 else
14635 {
14636 /* Generate relocs for the dynamic linker, except in
14637 the case of TLSLD where we'll use one entry per
14638 module. */
14639 asection *relgot;
14640 bfd_boolean ifunc;
14641
14642 *offp = off | 1;
14643 relgot = NULL;
14644 ifunc = (h != NULL
14645 ? h->elf.type == STT_GNU_IFUNC
14646 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14647 if (ifunc)
14648 {
14649 relgot = htab->elf.irelplt;
14650 if (indx == 0)
14651 htab->local_ifunc_resolver = 1;
14652 else if (is_static_defined (&h->elf))
14653 htab->maybe_local_ifunc_resolver = 1;
14654 }
14655 else if (indx != 0
14656 || (bfd_link_pic (info)
14657 && (h == NULL
14658 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14659 || (tls_type == (TLS_TLS | TLS_LD)
14660 && !h->elf.def_dynamic))))
14661 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14662 if (relgot != NULL)
14663 {
14664 outrel.r_offset = (got->output_section->vma
14665 + got->output_offset
14666 + off);
14667 outrel.r_addend = addend;
14668 if (tls_type & (TLS_LD | TLS_GD))
14669 {
14670 outrel.r_addend = 0;
14671 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14672 if (tls_type == (TLS_TLS | TLS_GD))
14673 {
14674 loc = relgot->contents;
14675 loc += (relgot->reloc_count++
14676 * sizeof (Elf64_External_Rela));
14677 bfd_elf64_swap_reloca_out (output_bfd,
14678 &outrel, loc);
14679 outrel.r_offset += 8;
14680 outrel.r_addend = addend;
14681 outrel.r_info
14682 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14683 }
14684 }
14685 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14686 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14687 else if (tls_type == (TLS_TLS | TLS_TPREL))
14688 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14689 else if (indx != 0)
14690 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14691 else
14692 {
14693 if (ifunc)
14694 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14695 else
14696 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14697
14698 /* Write the .got section contents for the sake
14699 of prelink. */
14700 loc = got->contents + off;
14701 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14702 loc);
14703 }
14704
14705 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14706 {
14707 outrel.r_addend += relocation;
14708 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14709 {
14710 if (htab->elf.tls_sec == NULL)
14711 outrel.r_addend = 0;
14712 else
14713 outrel.r_addend -= htab->elf.tls_sec->vma;
14714 }
14715 }
14716 loc = relgot->contents;
14717 loc += (relgot->reloc_count++
14718 * sizeof (Elf64_External_Rela));
14719 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14720 }
14721
14722 /* Init the .got section contents here if we're not
14723 emitting a reloc. */
14724 else
14725 {
14726 relocation += addend;
14727 if (tls_type != 0)
14728 {
14729 if (htab->elf.tls_sec == NULL)
14730 relocation = 0;
14731 else
14732 {
14733 if (tls_type & TLS_LD)
14734 relocation = 0;
14735 else
14736 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14737 if (tls_type & TLS_TPREL)
14738 relocation += DTP_OFFSET - TP_OFFSET;
14739 }
14740
14741 if (tls_type & (TLS_GD | TLS_LD))
14742 {
14743 bfd_put_64 (output_bfd, relocation,
14744 got->contents + off + 8);
14745 relocation = 1;
14746 }
14747 }
14748 bfd_put_64 (output_bfd, relocation,
14749 got->contents + off);
14750 }
14751 }
14752
14753 if (off >= (bfd_vma) -2)
14754 abort ();
14755
14756 relocation = got->output_section->vma + got->output_offset + off;
14757 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14758 }
14759 break;
14760
14761 case R_PPC64_PLT16_HA:
14762 case R_PPC64_PLT16_HI:
14763 case R_PPC64_PLT16_LO:
14764 case R_PPC64_PLT32:
14765 case R_PPC64_PLT64:
14766 /* Relocation is to the entry for this symbol in the
14767 procedure linkage table. */
14768 {
14769 struct plt_entry **plt_list = NULL;
14770 if (h != NULL)
14771 plt_list = &h->elf.plt.plist;
14772 else if (local_got_ents != NULL)
14773 {
14774 struct plt_entry **local_plt = (struct plt_entry **)
14775 (local_got_ents + symtab_hdr->sh_info);
14776 unsigned char *local_got_tls_masks = (unsigned char *)
14777 (local_plt + symtab_hdr->sh_info);
14778 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14779 plt_list = local_plt + r_symndx;
14780 }
14781 if (plt_list)
14782 {
14783 struct plt_entry *ent;
14784
14785 for (ent = *plt_list; ent != NULL; ent = ent->next)
14786 if (ent->plt.offset != (bfd_vma) -1
14787 && ent->addend == orig_rel.r_addend)
14788 {
14789 asection *plt;
14790
14791 plt = htab->elf.splt;
14792 if (!htab->elf.dynamic_sections_created
14793 || h == NULL
14794 || h->elf.dynindx == -1)
14795 plt = htab->elf.iplt;
14796 relocation = (plt->output_section->vma
14797 + plt->output_offset
14798 + ent->plt.offset);
14799 addend = 0;
14800 unresolved_reloc = FALSE;
14801 break;
14802 }
14803 }
14804 }
14805 break;
14806
14807 case R_PPC64_TOC:
14808 /* Relocation value is TOC base. */
14809 relocation = TOCstart;
14810 if (r_symndx == STN_UNDEF)
14811 relocation += htab->sec_info[input_section->id].toc_off;
14812 else if (unresolved_reloc)
14813 ;
14814 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14815 relocation += htab->sec_info[sec->id].toc_off;
14816 else
14817 unresolved_reloc = TRUE;
14818 goto dodyn;
14819
14820 /* TOC16 relocs. We want the offset relative to the TOC base,
14821 which is the address of the start of the TOC plus 0x8000.
14822 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14823 in this order. */
14824 case R_PPC64_TOC16:
14825 case R_PPC64_TOC16_LO:
14826 case R_PPC64_TOC16_HI:
14827 case R_PPC64_TOC16_DS:
14828 case R_PPC64_TOC16_LO_DS:
14829 case R_PPC64_TOC16_HA:
14830 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14831 break;
14832
14833 /* Relocate against the beginning of the section. */
14834 case R_PPC64_SECTOFF:
14835 case R_PPC64_SECTOFF_LO:
14836 case R_PPC64_SECTOFF_HI:
14837 case R_PPC64_SECTOFF_DS:
14838 case R_PPC64_SECTOFF_LO_DS:
14839 case R_PPC64_SECTOFF_HA:
14840 if (sec != NULL)
14841 addend -= sec->output_section->vma;
14842 break;
14843
14844 case R_PPC64_REL16:
14845 case R_PPC64_REL16_LO:
14846 case R_PPC64_REL16_HI:
14847 case R_PPC64_REL16_HA:
14848 case R_PPC64_REL16DX_HA:
14849 break;
14850
14851 case R_PPC64_REL14:
14852 case R_PPC64_REL14_BRNTAKEN:
14853 case R_PPC64_REL14_BRTAKEN:
14854 case R_PPC64_REL24:
14855 break;
14856
14857 case R_PPC64_TPREL16:
14858 case R_PPC64_TPREL16_LO:
14859 case R_PPC64_TPREL16_HI:
14860 case R_PPC64_TPREL16_HA:
14861 case R_PPC64_TPREL16_DS:
14862 case R_PPC64_TPREL16_LO_DS:
14863 case R_PPC64_TPREL16_HIGH:
14864 case R_PPC64_TPREL16_HIGHA:
14865 case R_PPC64_TPREL16_HIGHER:
14866 case R_PPC64_TPREL16_HIGHERA:
14867 case R_PPC64_TPREL16_HIGHEST:
14868 case R_PPC64_TPREL16_HIGHESTA:
14869 if (h != NULL
14870 && h->elf.root.type == bfd_link_hash_undefweak
14871 && h->elf.dynindx == -1)
14872 {
14873 /* Make this relocation against an undefined weak symbol
14874 resolve to zero. This is really just a tweak, since
14875 code using weak externs ought to check that they are
14876 defined before using them. */
14877 bfd_byte *p = contents + rel->r_offset - d_offset;
14878
14879 insn = bfd_get_32 (input_bfd, p);
14880 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14881 if (insn != 0)
14882 bfd_put_32 (input_bfd, insn, p);
14883 break;
14884 }
14885 if (htab->elf.tls_sec != NULL)
14886 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14887 if (bfd_link_pic (info))
14888 /* The TPREL16 relocs shouldn't really be used in shared
14889 libs as they will result in DT_TEXTREL being set, but
14890 support them anyway. */
14891 goto dodyn;
14892 break;
14893
14894 case R_PPC64_DTPREL16:
14895 case R_PPC64_DTPREL16_LO:
14896 case R_PPC64_DTPREL16_HI:
14897 case R_PPC64_DTPREL16_HA:
14898 case R_PPC64_DTPREL16_DS:
14899 case R_PPC64_DTPREL16_LO_DS:
14900 case R_PPC64_DTPREL16_HIGH:
14901 case R_PPC64_DTPREL16_HIGHA:
14902 case R_PPC64_DTPREL16_HIGHER:
14903 case R_PPC64_DTPREL16_HIGHERA:
14904 case R_PPC64_DTPREL16_HIGHEST:
14905 case R_PPC64_DTPREL16_HIGHESTA:
14906 if (htab->elf.tls_sec != NULL)
14907 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14908 break;
14909
14910 case R_PPC64_ADDR64_LOCAL:
14911 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14912 ? h->elf.other
14913 : sym->st_other);
14914 break;
14915
14916 case R_PPC64_DTPMOD64:
14917 relocation = 1;
14918 addend = 0;
14919 goto dodyn;
14920
14921 case R_PPC64_TPREL64:
14922 if (htab->elf.tls_sec != NULL)
14923 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14924 goto dodyn;
14925
14926 case R_PPC64_DTPREL64:
14927 if (htab->elf.tls_sec != NULL)
14928 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14929 /* Fall through. */
14930
14931 /* Relocations that may need to be propagated if this is a
14932 dynamic object. */
14933 case R_PPC64_REL30:
14934 case R_PPC64_REL32:
14935 case R_PPC64_REL64:
14936 case R_PPC64_ADDR14:
14937 case R_PPC64_ADDR14_BRNTAKEN:
14938 case R_PPC64_ADDR14_BRTAKEN:
14939 case R_PPC64_ADDR16:
14940 case R_PPC64_ADDR16_DS:
14941 case R_PPC64_ADDR16_HA:
14942 case R_PPC64_ADDR16_HI:
14943 case R_PPC64_ADDR16_HIGH:
14944 case R_PPC64_ADDR16_HIGHA:
14945 case R_PPC64_ADDR16_HIGHER:
14946 case R_PPC64_ADDR16_HIGHERA:
14947 case R_PPC64_ADDR16_HIGHEST:
14948 case R_PPC64_ADDR16_HIGHESTA:
14949 case R_PPC64_ADDR16_LO:
14950 case R_PPC64_ADDR16_LO_DS:
14951 case R_PPC64_ADDR24:
14952 case R_PPC64_ADDR32:
14953 case R_PPC64_ADDR64:
14954 case R_PPC64_UADDR16:
14955 case R_PPC64_UADDR32:
14956 case R_PPC64_UADDR64:
14957 dodyn:
14958 if ((input_section->flags & SEC_ALLOC) == 0)
14959 break;
14960
14961 if (NO_OPD_RELOCS && is_opd)
14962 break;
14963
14964 if (bfd_link_pic (info)
14965 ? ((h == NULL
14966 || h->dyn_relocs != NULL)
14967 && ((h != NULL && pc_dynrelocs (h))
14968 || must_be_dyn_reloc (info, r_type)))
14969 : (h != NULL
14970 ? h->dyn_relocs != NULL
14971 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14972 {
14973 bfd_boolean skip, relocate;
14974 asection *sreloc;
14975 bfd_vma out_off;
14976 long indx = 0;
14977
14978 /* When generating a dynamic object, these relocations
14979 are copied into the output file to be resolved at run
14980 time. */
14981
14982 skip = FALSE;
14983 relocate = FALSE;
14984
14985 out_off = _bfd_elf_section_offset (output_bfd, info,
14986 input_section, rel->r_offset);
14987 if (out_off == (bfd_vma) -1)
14988 skip = TRUE;
14989 else if (out_off == (bfd_vma) -2)
14990 skip = TRUE, relocate = TRUE;
14991 out_off += (input_section->output_section->vma
14992 + input_section->output_offset);
14993 outrel.r_offset = out_off;
14994 outrel.r_addend = rel->r_addend;
14995
14996 /* Optimize unaligned reloc use. */
14997 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14998 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14999 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
15000 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
15001 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
15002 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
15003 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
15004 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
15005 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
15006
15007 if (skip)
15008 memset (&outrel, 0, sizeof outrel);
15009 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
15010 && !is_opd
15011 && r_type != R_PPC64_TOC)
15012 {
15013 indx = h->elf.dynindx;
15014 BFD_ASSERT (indx != -1);
15015 outrel.r_info = ELF64_R_INFO (indx, r_type);
15016 }
15017 else
15018 {
15019 /* This symbol is local, or marked to become local,
15020 or this is an opd section reloc which must point
15021 at a local function. */
15022 outrel.r_addend += relocation;
15023 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
15024 {
15025 if (is_opd && h != NULL)
15026 {
15027 /* Lie about opd entries. This case occurs
15028 when building shared libraries and we
15029 reference a function in another shared
15030 lib. The same thing happens for a weak
15031 definition in an application that's
15032 overridden by a strong definition in a
15033 shared lib. (I believe this is a generic
15034 bug in binutils handling of weak syms.)
15035 In these cases we won't use the opd
15036 entry in this lib. */
15037 unresolved_reloc = FALSE;
15038 }
15039 if (!is_opd
15040 && r_type == R_PPC64_ADDR64
15041 && (h != NULL
15042 ? h->elf.type == STT_GNU_IFUNC
15043 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15044 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15045 else
15046 {
15047 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15048
15049 /* We need to relocate .opd contents for ld.so.
15050 Prelink also wants simple and consistent rules
15051 for relocs. This make all RELATIVE relocs have
15052 *r_offset equal to r_addend. */
15053 relocate = TRUE;
15054 }
15055 }
15056 else
15057 {
15058 if (h != NULL
15059 ? h->elf.type == STT_GNU_IFUNC
15060 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15061 {
15062 info->callbacks->einfo
15063 /* xgettext:c-format */
15064 (_("%H: %s for indirect "
15065 "function `%T' unsupported\n"),
15066 input_bfd, input_section, rel->r_offset,
15067 ppc64_elf_howto_table[r_type]->name,
15068 sym_name);
15069 ret = FALSE;
15070 }
15071 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15072 ;
15073 else if (sec == NULL || sec->owner == NULL)
15074 {
15075 bfd_set_error (bfd_error_bad_value);
15076 return FALSE;
15077 }
15078 else
15079 {
15080 asection *osec;
15081
15082 osec = sec->output_section;
15083 indx = elf_section_data (osec)->dynindx;
15084
15085 if (indx == 0)
15086 {
15087 if ((osec->flags & SEC_READONLY) == 0
15088 && htab->elf.data_index_section != NULL)
15089 osec = htab->elf.data_index_section;
15090 else
15091 osec = htab->elf.text_index_section;
15092 indx = elf_section_data (osec)->dynindx;
15093 }
15094 BFD_ASSERT (indx != 0);
15095
15096 /* We are turning this relocation into one
15097 against a section symbol, so subtract out
15098 the output section's address but not the
15099 offset of the input section in the output
15100 section. */
15101 outrel.r_addend -= osec->vma;
15102 }
15103
15104 outrel.r_info = ELF64_R_INFO (indx, r_type);
15105 }
15106 }
15107
15108 sreloc = elf_section_data (input_section)->sreloc;
15109 if (h != NULL
15110 ? h->elf.type == STT_GNU_IFUNC
15111 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15112 {
15113 sreloc = htab->elf.irelplt;
15114 if (indx == 0)
15115 htab->local_ifunc_resolver = 1;
15116 else if (is_static_defined (&h->elf))
15117 htab->maybe_local_ifunc_resolver = 1;
15118 }
15119 if (sreloc == NULL)
15120 abort ();
15121
15122 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15123 >= sreloc->size)
15124 abort ();
15125 loc = sreloc->contents;
15126 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15127 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15128
15129 /* If this reloc is against an external symbol, it will
15130 be computed at runtime, so there's no need to do
15131 anything now. However, for the sake of prelink ensure
15132 that the section contents are a known value. */
15133 if (! relocate)
15134 {
15135 unresolved_reloc = FALSE;
15136 /* The value chosen here is quite arbitrary as ld.so
15137 ignores section contents except for the special
15138 case of .opd where the contents might be accessed
15139 before relocation. Choose zero, as that won't
15140 cause reloc overflow. */
15141 relocation = 0;
15142 addend = 0;
15143 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15144 to improve backward compatibility with older
15145 versions of ld. */
15146 if (r_type == R_PPC64_ADDR64)
15147 addend = outrel.r_addend;
15148 /* Adjust pc_relative relocs to have zero in *r_offset. */
15149 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15150 addend = outrel.r_offset;
15151 }
15152 }
15153 break;
15154
15155 case R_PPC64_COPY:
15156 case R_PPC64_GLOB_DAT:
15157 case R_PPC64_JMP_SLOT:
15158 case R_PPC64_JMP_IREL:
15159 case R_PPC64_RELATIVE:
15160 /* We shouldn't ever see these dynamic relocs in relocatable
15161 files. */
15162 /* Fall through. */
15163
15164 case R_PPC64_PLTGOT16:
15165 case R_PPC64_PLTGOT16_DS:
15166 case R_PPC64_PLTGOT16_HA:
15167 case R_PPC64_PLTGOT16_HI:
15168 case R_PPC64_PLTGOT16_LO:
15169 case R_PPC64_PLTGOT16_LO_DS:
15170 case R_PPC64_PLTREL32:
15171 case R_PPC64_PLTREL64:
15172 /* These ones haven't been implemented yet. */
15173
15174 info->callbacks->einfo
15175 /* xgettext:c-format */
15176 (_("%P: %B: %s is not supported for `%T'\n"),
15177 input_bfd,
15178 ppc64_elf_howto_table[r_type]->name, sym_name);
15179
15180 bfd_set_error (bfd_error_invalid_operation);
15181 ret = FALSE;
15182 goto copy_reloc;
15183 }
15184
15185 /* Multi-instruction sequences that access the TOC can be
15186 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15187 to nop; addi rb,r2,x; */
15188 switch (r_type)
15189 {
15190 default:
15191 break;
15192
15193 case R_PPC64_GOT_TLSLD16_HI:
15194 case R_PPC64_GOT_TLSGD16_HI:
15195 case R_PPC64_GOT_TPREL16_HI:
15196 case R_PPC64_GOT_DTPREL16_HI:
15197 case R_PPC64_GOT16_HI:
15198 case R_PPC64_TOC16_HI:
15199 /* These relocs would only be useful if building up an
15200 offset to later add to r2, perhaps in an indexed
15201 addressing mode instruction. Don't try to optimize.
15202 Unfortunately, the possibility of someone building up an
15203 offset like this or even with the HA relocs, means that
15204 we need to check the high insn when optimizing the low
15205 insn. */
15206 break;
15207
15208 case R_PPC64_GOT_TLSLD16_HA:
15209 case R_PPC64_GOT_TLSGD16_HA:
15210 case R_PPC64_GOT_TPREL16_HA:
15211 case R_PPC64_GOT_DTPREL16_HA:
15212 case R_PPC64_GOT16_HA:
15213 case R_PPC64_TOC16_HA:
15214 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15215 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15216 {
15217 bfd_byte *p = contents + (rel->r_offset & ~3);
15218 bfd_put_32 (input_bfd, NOP, p);
15219 }
15220 break;
15221
15222 case R_PPC64_GOT_TLSLD16_LO:
15223 case R_PPC64_GOT_TLSGD16_LO:
15224 case R_PPC64_GOT_TPREL16_LO_DS:
15225 case R_PPC64_GOT_DTPREL16_LO_DS:
15226 case R_PPC64_GOT16_LO:
15227 case R_PPC64_GOT16_LO_DS:
15228 case R_PPC64_TOC16_LO:
15229 case R_PPC64_TOC16_LO_DS:
15230 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15231 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15232 {
15233 bfd_byte *p = contents + (rel->r_offset & ~3);
15234 insn = bfd_get_32 (input_bfd, p);
15235 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15236 {
15237 /* Transform addic to addi when we change reg. */
15238 insn &= ~((0x3f << 26) | (0x1f << 16));
15239 insn |= (14u << 26) | (2 << 16);
15240 }
15241 else
15242 {
15243 insn &= ~(0x1f << 16);
15244 insn |= 2 << 16;
15245 }
15246 bfd_put_32 (input_bfd, insn, p);
15247 }
15248 break;
15249 }
15250
15251 /* Do any further special processing. */
15252 howto = ppc64_elf_howto_table[(int) r_type];
15253 switch (r_type)
15254 {
15255 default:
15256 break;
15257
15258 case R_PPC64_REL16_HA:
15259 case R_PPC64_REL16DX_HA:
15260 case R_PPC64_ADDR16_HA:
15261 case R_PPC64_ADDR16_HIGHA:
15262 case R_PPC64_ADDR16_HIGHERA:
15263 case R_PPC64_ADDR16_HIGHESTA:
15264 case R_PPC64_TOC16_HA:
15265 case R_PPC64_SECTOFF_HA:
15266 case R_PPC64_TPREL16_HA:
15267 case R_PPC64_TPREL16_HIGHA:
15268 case R_PPC64_TPREL16_HIGHERA:
15269 case R_PPC64_TPREL16_HIGHESTA:
15270 case R_PPC64_DTPREL16_HA:
15271 case R_PPC64_DTPREL16_HIGHA:
15272 case R_PPC64_DTPREL16_HIGHERA:
15273 case R_PPC64_DTPREL16_HIGHESTA:
15274 /* It's just possible that this symbol is a weak symbol
15275 that's not actually defined anywhere. In that case,
15276 'sec' would be NULL, and we should leave the symbol
15277 alone (it will be set to zero elsewhere in the link). */
15278 if (sec == NULL)
15279 break;
15280 /* Fall through. */
15281
15282 case R_PPC64_GOT16_HA:
15283 case R_PPC64_PLTGOT16_HA:
15284 case R_PPC64_PLT16_HA:
15285 case R_PPC64_GOT_TLSGD16_HA:
15286 case R_PPC64_GOT_TLSLD16_HA:
15287 case R_PPC64_GOT_TPREL16_HA:
15288 case R_PPC64_GOT_DTPREL16_HA:
15289 /* Add 0x10000 if sign bit in 0:15 is set.
15290 Bits 0:15 are not used. */
15291 addend += 0x8000;
15292 break;
15293
15294 case R_PPC64_ADDR16_DS:
15295 case R_PPC64_ADDR16_LO_DS:
15296 case R_PPC64_GOT16_DS:
15297 case R_PPC64_GOT16_LO_DS:
15298 case R_PPC64_PLT16_LO_DS:
15299 case R_PPC64_SECTOFF_DS:
15300 case R_PPC64_SECTOFF_LO_DS:
15301 case R_PPC64_TOC16_DS:
15302 case R_PPC64_TOC16_LO_DS:
15303 case R_PPC64_PLTGOT16_DS:
15304 case R_PPC64_PLTGOT16_LO_DS:
15305 case R_PPC64_GOT_TPREL16_DS:
15306 case R_PPC64_GOT_TPREL16_LO_DS:
15307 case R_PPC64_GOT_DTPREL16_DS:
15308 case R_PPC64_GOT_DTPREL16_LO_DS:
15309 case R_PPC64_TPREL16_DS:
15310 case R_PPC64_TPREL16_LO_DS:
15311 case R_PPC64_DTPREL16_DS:
15312 case R_PPC64_DTPREL16_LO_DS:
15313 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15314 mask = 3;
15315 /* If this reloc is against an lq, lxv, or stxv insn, then
15316 the value must be a multiple of 16. This is somewhat of
15317 a hack, but the "correct" way to do this by defining _DQ
15318 forms of all the _DS relocs bloats all reloc switches in
15319 this file. It doesn't make much sense to use these
15320 relocs in data, so testing the insn should be safe. */
15321 if ((insn & (0x3f << 26)) == (56u << 26)
15322 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15323 mask = 15;
15324 relocation += addend;
15325 addend = insn & (mask ^ 3);
15326 if ((relocation & mask) != 0)
15327 {
15328 relocation ^= relocation & mask;
15329 info->callbacks->einfo
15330 /* xgettext:c-format */
15331 (_("%H: error: %s not a multiple of %u\n"),
15332 input_bfd, input_section, rel->r_offset,
15333 howto->name,
15334 mask + 1);
15335 bfd_set_error (bfd_error_bad_value);
15336 ret = FALSE;
15337 goto copy_reloc;
15338 }
15339 break;
15340 }
15341
15342 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15343 because such sections are not SEC_ALLOC and thus ld.so will
15344 not process them. */
15345 if (unresolved_reloc
15346 && !((input_section->flags & SEC_DEBUGGING) != 0
15347 && h->elf.def_dynamic)
15348 && _bfd_elf_section_offset (output_bfd, info, input_section,
15349 rel->r_offset) != (bfd_vma) -1)
15350 {
15351 info->callbacks->einfo
15352 /* xgettext:c-format */
15353 (_("%H: unresolvable %s against `%T'\n"),
15354 input_bfd, input_section, rel->r_offset,
15355 howto->name,
15356 h->elf.root.root.string);
15357 ret = FALSE;
15358 }
15359
15360 /* 16-bit fields in insns mostly have signed values, but a
15361 few insns have 16-bit unsigned values. Really, we should
15362 have different reloc types. */
15363 if (howto->complain_on_overflow != complain_overflow_dont
15364 && howto->dst_mask == 0xffff
15365 && (input_section->flags & SEC_CODE) != 0)
15366 {
15367 enum complain_overflow complain = complain_overflow_signed;
15368
15369 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15370 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15371 complain = complain_overflow_bitfield;
15372 else if (howto->rightshift == 0
15373 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15374 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15375 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15376 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15377 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15378 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15379 complain = complain_overflow_unsigned;
15380 if (howto->complain_on_overflow != complain)
15381 {
15382 alt_howto = *howto;
15383 alt_howto.complain_on_overflow = complain;
15384 howto = &alt_howto;
15385 }
15386 }
15387
15388 if (r_type == R_PPC64_REL16DX_HA)
15389 {
15390 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15391 if (rel->r_offset + 4 > input_section->size)
15392 r = bfd_reloc_outofrange;
15393 else
15394 {
15395 relocation += addend;
15396 relocation -= (rel->r_offset
15397 + input_section->output_offset
15398 + input_section->output_section->vma);
15399 relocation = (bfd_signed_vma) relocation >> 16;
15400 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15401 insn &= ~0x1fffc1;
15402 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15403 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15404 r = bfd_reloc_ok;
15405 if (relocation + 0x8000 > 0xffff)
15406 r = bfd_reloc_overflow;
15407 }
15408 }
15409 else
15410 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15411 rel->r_offset, relocation, addend);
15412
15413 if (r != bfd_reloc_ok)
15414 {
15415 char *more_info = NULL;
15416 const char *reloc_name = howto->name;
15417
15418 if (reloc_dest != DEST_NORMAL)
15419 {
15420 more_info = bfd_malloc (strlen (reloc_name) + 8);
15421 if (more_info != NULL)
15422 {
15423 strcpy (more_info, reloc_name);
15424 strcat (more_info, (reloc_dest == DEST_OPD
15425 ? " (OPD)" : " (stub)"));
15426 reloc_name = more_info;
15427 }
15428 }
15429
15430 if (r == bfd_reloc_overflow)
15431 {
15432 /* On code like "if (foo) foo();" don't report overflow
15433 on a branch to zero when foo is undefined. */
15434 if (!warned
15435 && (reloc_dest == DEST_STUB
15436 || !(h != NULL
15437 && (h->elf.root.type == bfd_link_hash_undefweak
15438 || h->elf.root.type == bfd_link_hash_undefined)
15439 && is_branch_reloc (r_type))))
15440 info->callbacks->reloc_overflow (info, &h->elf.root,
15441 sym_name, reloc_name,
15442 orig_rel.r_addend,
15443 input_bfd, input_section,
15444 rel->r_offset);
15445 }
15446 else
15447 {
15448 info->callbacks->einfo
15449 /* xgettext:c-format */
15450 (_("%H: %s against `%T': error %d\n"),
15451 input_bfd, input_section, rel->r_offset,
15452 reloc_name, sym_name, (int) r);
15453 ret = FALSE;
15454 }
15455 if (more_info != NULL)
15456 free (more_info);
15457 }
15458 copy_reloc:
15459 if (wrel != rel)
15460 *wrel = *rel;
15461 }
15462
15463 if (wrel != rel)
15464 {
15465 Elf_Internal_Shdr *rel_hdr;
15466 size_t deleted = rel - wrel;
15467
15468 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15469 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15470 if (rel_hdr->sh_size == 0)
15471 {
15472 /* It is too late to remove an empty reloc section. Leave
15473 one NONE reloc.
15474 ??? What is wrong with an empty section??? */
15475 rel_hdr->sh_size = rel_hdr->sh_entsize;
15476 deleted -= 1;
15477 }
15478 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15479 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15480 input_section->reloc_count -= deleted;
15481 }
15482
15483 /* If we're emitting relocations, then shortly after this function
15484 returns, reloc offsets and addends for this section will be
15485 adjusted. Worse, reloc symbol indices will be for the output
15486 file rather than the input. Save a copy of the relocs for
15487 opd_entry_value. */
15488 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15489 {
15490 bfd_size_type amt;
15491 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15492 rel = bfd_alloc (input_bfd, amt);
15493 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15494 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15495 if (rel == NULL)
15496 return FALSE;
15497 memcpy (rel, relocs, amt);
15498 }
15499 return ret;
15500 }
15501
15502 /* Adjust the value of any local symbols in opd sections. */
15503
15504 static int
15505 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15506 const char *name ATTRIBUTE_UNUSED,
15507 Elf_Internal_Sym *elfsym,
15508 asection *input_sec,
15509 struct elf_link_hash_entry *h)
15510 {
15511 struct _opd_sec_data *opd;
15512 long adjust;
15513 bfd_vma value;
15514
15515 if (h != NULL)
15516 return 1;
15517
15518 opd = get_opd_info (input_sec);
15519 if (opd == NULL || opd->adjust == NULL)
15520 return 1;
15521
15522 value = elfsym->st_value - input_sec->output_offset;
15523 if (!bfd_link_relocatable (info))
15524 value -= input_sec->output_section->vma;
15525
15526 adjust = opd->adjust[OPD_NDX (value)];
15527 if (adjust == -1)
15528 return 2;
15529
15530 elfsym->st_value += adjust;
15531 return 1;
15532 }
15533
15534 /* Finish up dynamic symbol handling. We set the contents of various
15535 dynamic sections here. */
15536
15537 static bfd_boolean
15538 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15539 struct bfd_link_info *info,
15540 struct elf_link_hash_entry *h,
15541 Elf_Internal_Sym *sym)
15542 {
15543 struct ppc_link_hash_table *htab;
15544 struct plt_entry *ent;
15545 Elf_Internal_Rela rela;
15546 bfd_byte *loc;
15547
15548 htab = ppc_hash_table (info);
15549 if (htab == NULL)
15550 return FALSE;
15551
15552 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15553 if (ent->plt.offset != (bfd_vma) -1)
15554 {
15555 /* This symbol has an entry in the procedure linkage
15556 table. Set it up. */
15557 if (!htab->elf.dynamic_sections_created
15558 || h->dynindx == -1)
15559 {
15560 BFD_ASSERT (h->type == STT_GNU_IFUNC
15561 && h->def_regular
15562 && (h->root.type == bfd_link_hash_defined
15563 || h->root.type == bfd_link_hash_defweak));
15564 rela.r_offset = (htab->elf.iplt->output_section->vma
15565 + htab->elf.iplt->output_offset
15566 + ent->plt.offset);
15567 if (htab->opd_abi)
15568 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15569 else
15570 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15571 rela.r_addend = (h->root.u.def.value
15572 + h->root.u.def.section->output_offset
15573 + h->root.u.def.section->output_section->vma
15574 + ent->addend);
15575 loc = (htab->elf.irelplt->contents
15576 + (htab->elf.irelplt->reloc_count++
15577 * sizeof (Elf64_External_Rela)));
15578 htab->local_ifunc_resolver = 1;
15579 }
15580 else
15581 {
15582 rela.r_offset = (htab->elf.splt->output_section->vma
15583 + htab->elf.splt->output_offset
15584 + ent->plt.offset);
15585 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15586 rela.r_addend = ent->addend;
15587 loc = (htab->elf.srelplt->contents
15588 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15589 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15590 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15591 htab->maybe_local_ifunc_resolver = 1;
15592 }
15593 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15594
15595 if (!htab->opd_abi)
15596 {
15597 if (!h->def_regular)
15598 {
15599 /* Mark the symbol as undefined, rather than as
15600 defined in glink. Leave the value if there were
15601 any relocations where pointer equality matters
15602 (this is a clue for the dynamic linker, to make
15603 function pointer comparisons work between an
15604 application and shared library), otherwise set it
15605 to zero. */
15606 sym->st_shndx = SHN_UNDEF;
15607 if (!h->pointer_equality_needed)
15608 sym->st_value = 0;
15609 else if (!h->ref_regular_nonweak)
15610 {
15611 /* This breaks function pointer comparisons, but
15612 that is better than breaking tests for a NULL
15613 function pointer. */
15614 sym->st_value = 0;
15615 }
15616 }
15617 }
15618 }
15619
15620 if (h->needs_copy)
15621 {
15622 /* This symbol needs a copy reloc. Set it up. */
15623 asection *srel;
15624
15625 if (h->dynindx == -1
15626 || (h->root.type != bfd_link_hash_defined
15627 && h->root.type != bfd_link_hash_defweak)
15628 || htab->elf.srelbss == NULL
15629 || htab->elf.sreldynrelro == NULL)
15630 abort ();
15631
15632 rela.r_offset = (h->root.u.def.value
15633 + h->root.u.def.section->output_section->vma
15634 + h->root.u.def.section->output_offset);
15635 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15636 rela.r_addend = 0;
15637 if (h->root.u.def.section == htab->elf.sdynrelro)
15638 srel = htab->elf.sreldynrelro;
15639 else
15640 srel = htab->elf.srelbss;
15641 loc = srel->contents;
15642 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15643 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15644 }
15645
15646 return TRUE;
15647 }
15648
15649 /* Used to decide how to sort relocs in an optimal manner for the
15650 dynamic linker, before writing them out. */
15651
15652 static enum elf_reloc_type_class
15653 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15654 const asection *rel_sec,
15655 const Elf_Internal_Rela *rela)
15656 {
15657 enum elf_ppc64_reloc_type r_type;
15658 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15659
15660 if (rel_sec == htab->elf.irelplt)
15661 return reloc_class_ifunc;
15662
15663 r_type = ELF64_R_TYPE (rela->r_info);
15664 switch (r_type)
15665 {
15666 case R_PPC64_RELATIVE:
15667 return reloc_class_relative;
15668 case R_PPC64_JMP_SLOT:
15669 return reloc_class_plt;
15670 case R_PPC64_COPY:
15671 return reloc_class_copy;
15672 default:
15673 return reloc_class_normal;
15674 }
15675 }
15676
15677 /* Finish up the dynamic sections. */
15678
15679 static bfd_boolean
15680 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15681 struct bfd_link_info *info)
15682 {
15683 struct ppc_link_hash_table *htab;
15684 bfd *dynobj;
15685 asection *sdyn;
15686
15687 htab = ppc_hash_table (info);
15688 if (htab == NULL)
15689 return FALSE;
15690
15691 dynobj = htab->elf.dynobj;
15692 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15693
15694 if (htab->elf.dynamic_sections_created)
15695 {
15696 Elf64_External_Dyn *dyncon, *dynconend;
15697
15698 if (sdyn == NULL || htab->elf.sgot == NULL)
15699 abort ();
15700
15701 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15702 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15703 for (; dyncon < dynconend; dyncon++)
15704 {
15705 Elf_Internal_Dyn dyn;
15706 asection *s;
15707
15708 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15709
15710 switch (dyn.d_tag)
15711 {
15712 default:
15713 continue;
15714
15715 case DT_PPC64_GLINK:
15716 s = htab->glink;
15717 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15718 /* We stupidly defined DT_PPC64_GLINK to be the start
15719 of glink rather than the first entry point, which is
15720 what ld.so needs, and now have a bigger stub to
15721 support automatic multiple TOCs. */
15722 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15723 break;
15724
15725 case DT_PPC64_OPD:
15726 s = bfd_get_section_by_name (output_bfd, ".opd");
15727 if (s == NULL)
15728 continue;
15729 dyn.d_un.d_ptr = s->vma;
15730 break;
15731
15732 case DT_PPC64_OPT:
15733 if (htab->do_multi_toc && htab->multi_toc_needed)
15734 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15735 if (htab->has_plt_localentry0)
15736 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15737 break;
15738
15739 case DT_PPC64_OPDSZ:
15740 s = bfd_get_section_by_name (output_bfd, ".opd");
15741 if (s == NULL)
15742 continue;
15743 dyn.d_un.d_val = s->size;
15744 break;
15745
15746 case DT_PLTGOT:
15747 s = htab->elf.splt;
15748 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15749 break;
15750
15751 case DT_JMPREL:
15752 s = htab->elf.srelplt;
15753 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15754 break;
15755
15756 case DT_PLTRELSZ:
15757 dyn.d_un.d_val = htab->elf.srelplt->size;
15758 break;
15759
15760 case DT_TEXTREL:
15761 if (htab->local_ifunc_resolver)
15762 info->callbacks->einfo
15763 (_("%X%P: text relocations and GNU indirect "
15764 "functions will result in a segfault at runtime\n"));
15765 else if (htab->maybe_local_ifunc_resolver)
15766 info->callbacks->einfo
15767 (_("%P: warning: text relocations and GNU indirect "
15768 "functions may result in a segfault at runtime\n"));
15769 continue;
15770 }
15771
15772 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15773 }
15774 }
15775
15776 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15777 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15778 {
15779 /* Fill in the first entry in the global offset table.
15780 We use it to hold the link-time TOCbase. */
15781 bfd_put_64 (output_bfd,
15782 elf_gp (output_bfd) + TOC_BASE_OFF,
15783 htab->elf.sgot->contents);
15784
15785 /* Set .got entry size. */
15786 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15787 }
15788
15789 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15790 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15791 {
15792 /* Set .plt entry size. */
15793 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15794 = PLT_ENTRY_SIZE (htab);
15795 }
15796
15797 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15798 brlt ourselves if emitrelocations. */
15799 if (htab->brlt != NULL
15800 && htab->brlt->reloc_count != 0
15801 && !_bfd_elf_link_output_relocs (output_bfd,
15802 htab->brlt,
15803 elf_section_data (htab->brlt)->rela.hdr,
15804 elf_section_data (htab->brlt)->relocs,
15805 NULL))
15806 return FALSE;
15807
15808 if (htab->glink != NULL
15809 && htab->glink->reloc_count != 0
15810 && !_bfd_elf_link_output_relocs (output_bfd,
15811 htab->glink,
15812 elf_section_data (htab->glink)->rela.hdr,
15813 elf_section_data (htab->glink)->relocs,
15814 NULL))
15815 return FALSE;
15816
15817 if (htab->glink_eh_frame != NULL
15818 && htab->glink_eh_frame->size != 0)
15819 {
15820 bfd_vma val;
15821 bfd_byte *p;
15822 struct map_stub *group;
15823 size_t align = 4;
15824
15825 p = htab->glink_eh_frame->contents;
15826 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15827
15828 for (group = htab->group; group != NULL; group = group->next)
15829 if (group->stub_sec != NULL)
15830 {
15831 /* Offset to stub section. */
15832 val = (group->stub_sec->output_section->vma
15833 + group->stub_sec->output_offset);
15834 val -= (htab->glink_eh_frame->output_section->vma
15835 + htab->glink_eh_frame->output_offset
15836 + (p + 8 - htab->glink_eh_frame->contents));
15837 if (val + 0x80000000 > 0xffffffff)
15838 {
15839 info->callbacks->einfo
15840 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15841 group->stub_sec->name);
15842 return FALSE;
15843 }
15844 bfd_put_32 (dynobj, val, p + 8);
15845 p += stub_eh_frame_size (group, align);
15846 }
15847 if (htab->glink != NULL && htab->glink->size != 0)
15848 {
15849 /* Offset to .glink. */
15850 val = (htab->glink->output_section->vma
15851 + htab->glink->output_offset
15852 + 8);
15853 val -= (htab->glink_eh_frame->output_section->vma
15854 + htab->glink_eh_frame->output_offset
15855 + (p + 8 - htab->glink_eh_frame->contents));
15856 if (val + 0x80000000 > 0xffffffff)
15857 {
15858 info->callbacks->einfo
15859 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15860 htab->glink->name);
15861 return FALSE;
15862 }
15863 bfd_put_32 (dynobj, val, p + 8);
15864 p += (24 + align - 1) & -align;
15865 }
15866
15867 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15868 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15869 htab->glink_eh_frame,
15870 htab->glink_eh_frame->contents))
15871 return FALSE;
15872 }
15873
15874 /* We need to handle writing out multiple GOT sections ourselves,
15875 since we didn't add them to DYNOBJ. We know dynobj is the first
15876 bfd. */
15877 while ((dynobj = dynobj->link.next) != NULL)
15878 {
15879 asection *s;
15880
15881 if (!is_ppc64_elf (dynobj))
15882 continue;
15883
15884 s = ppc64_elf_tdata (dynobj)->got;
15885 if (s != NULL
15886 && s->size != 0
15887 && s->output_section != bfd_abs_section_ptr
15888 && !bfd_set_section_contents (output_bfd, s->output_section,
15889 s->contents, s->output_offset,
15890 s->size))
15891 return FALSE;
15892 s = ppc64_elf_tdata (dynobj)->relgot;
15893 if (s != NULL
15894 && s->size != 0
15895 && s->output_section != bfd_abs_section_ptr
15896 && !bfd_set_section_contents (output_bfd, s->output_section,
15897 s->contents, s->output_offset,
15898 s->size))
15899 return FALSE;
15900 }
15901
15902 return TRUE;
15903 }
15904
15905 #include "elf64-target.h"
15906
15907 /* FreeBSD support */
15908
15909 #undef TARGET_LITTLE_SYM
15910 #undef TARGET_LITTLE_NAME
15911
15912 #undef TARGET_BIG_SYM
15913 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15914 #undef TARGET_BIG_NAME
15915 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15916
15917 #undef ELF_OSABI
15918 #define ELF_OSABI ELFOSABI_FREEBSD
15919
15920 #undef elf64_bed
15921 #define elf64_bed elf64_powerpc_fbsd_bed
15922
15923 #include "elf64-target.h"