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Use ui_file_as_string in gdb/printcmd.c
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2016 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_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90 #define elf_backend_object_p ppc64_elf_object_p
91 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93 #define elf_backend_write_core_note ppc64_elf_write_core_note
94 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97 #define elf_backend_check_directives ppc64_elf_before_check_relocs
98 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
99 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100 #define elf_backend_check_relocs ppc64_elf_check_relocs
101 #define elf_backend_gc_keep ppc64_elf_gc_keep
102 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
107 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
130
131 /* Offsets to some stack save slots. */
132 #define STK_LR 16
133 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
134 /* This one is dodgy. ELFv2 does not have a linker word, so use the
135 CR save slot. Used only by optimised __tls_get_addr call stub,
136 relying on __tls_get_addr_opt not saving CR.. */
137 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
138
139 /* TOC base pointers offset from start of TOC. */
140 #define TOC_BASE_OFF 0x8000
141 /* TOC base alignment. */
142 #define TOC_BASE_ALIGN 256
143
144 /* Offset of tp and dtp pointers from start of TLS block. */
145 #define TP_OFFSET 0x7000
146 #define DTP_OFFSET 0x8000
147
148 /* .plt call stub instructions. The normal stub is like this, but
149 sometimes the .plt entry crosses a 64k boundary and we need to
150 insert an addi to adjust r11. */
151 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
152 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
153 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
154 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
155 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
156 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
157 #define BCTR 0x4e800420 /* bctr */
158
159 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
160 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
161 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
162
163 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
164 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
165 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
166 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
167 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
168 #define BNECTR 0x4ca20420 /* bnectr+ */
169 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
170
171 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
172 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
173 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
174
175 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
176 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
177 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
178
179 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
180 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
181 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
182 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
183 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
184
185 /* glink call stub instructions. We enter with the index in R0. */
186 #define GLINK_CALL_STUB_SIZE (16*4)
187 /* 0: */
188 /* .quad plt0-1f */
189 /* __glink: */
190 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
191 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
192 /* 1: */
193 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
194 /* ld %2,(0b-1b)(%11) */
195 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
196 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
197 /* ld %12,0(%11) */
198 /* ld %2,8(%11) */
199 /* mtctr %12 */
200 /* ld %11,16(%11) */
201 /* bctr */
202 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
203 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
204 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
205 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
206 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
207
208 /* Pad with this. */
209 #define NOP 0x60000000
210
211 /* Some other nops. */
212 #define CROR_151515 0x4def7b82
213 #define CROR_313131 0x4ffffb82
214
215 /* .glink entries for the first 32k functions are two instructions. */
216 #define LI_R0_0 0x38000000 /* li %r0,0 */
217 #define B_DOT 0x48000000 /* b . */
218
219 /* After that, we need two instructions to load the index, followed by
220 a branch. */
221 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
222 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
223
224 /* Instructions used by the save and restore reg functions. */
225 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
226 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
227 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
228 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
229 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
230 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
231 #define LI_R12_0 0x39800000 /* li %r12,0 */
232 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
233 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
234 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
235 #define BLR 0x4e800020 /* blr */
236
237 /* Since .opd is an array of descriptors and each entry will end up
238 with identical R_PPC64_RELATIVE relocs, there is really no need to
239 propagate .opd relocs; The dynamic linker should be taught to
240 relocate .opd without reloc entries. */
241 #ifndef NO_OPD_RELOCS
242 #define NO_OPD_RELOCS 0
243 #endif
244
245 #ifndef ARRAY_SIZE
246 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
247 #endif
248
249 static inline int
250 abiversion (bfd *abfd)
251 {
252 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
253 }
254
255 static inline void
256 set_abiversion (bfd *abfd, int ver)
257 {
258 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
259 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
260 }
261 \f
262 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
263
264 /* Relocation HOWTO's. */
265 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
266
267 static reloc_howto_type ppc64_elf_howto_raw[] = {
268 /* This reloc does nothing. */
269 HOWTO (R_PPC64_NONE, /* type */
270 0, /* rightshift */
271 3, /* size (0 = byte, 1 = short, 2 = long) */
272 0, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC64_NONE", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* A standard 32 bit relocation. */
284 HOWTO (R_PPC64_ADDR32, /* type */
285 0, /* rightshift */
286 2, /* size (0 = byte, 1 = short, 2 = long) */
287 32, /* bitsize */
288 FALSE, /* pc_relative */
289 0, /* bitpos */
290 complain_overflow_bitfield, /* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_PPC64_ADDR32", /* name */
293 FALSE, /* partial_inplace */
294 0, /* src_mask */
295 0xffffffff, /* dst_mask */
296 FALSE), /* pcrel_offset */
297
298 /* An absolute 26 bit branch; the lower two bits must be zero.
299 FIXME: we don't check that, we just clear them. */
300 HOWTO (R_PPC64_ADDR24, /* type */
301 0, /* rightshift */
302 2, /* size (0 = byte, 1 = short, 2 = long) */
303 26, /* bitsize */
304 FALSE, /* pc_relative */
305 0, /* bitpos */
306 complain_overflow_bitfield, /* complain_on_overflow */
307 bfd_elf_generic_reloc, /* special_function */
308 "R_PPC64_ADDR24", /* name */
309 FALSE, /* partial_inplace */
310 0, /* src_mask */
311 0x03fffffc, /* dst_mask */
312 FALSE), /* pcrel_offset */
313
314 /* A standard 16 bit relocation. */
315 HOWTO (R_PPC64_ADDR16, /* type */
316 0, /* rightshift */
317 1, /* size (0 = byte, 1 = short, 2 = long) */
318 16, /* bitsize */
319 FALSE, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_bitfield, /* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_PPC64_ADDR16", /* name */
324 FALSE, /* partial_inplace */
325 0, /* src_mask */
326 0xffff, /* dst_mask */
327 FALSE), /* pcrel_offset */
328
329 /* A 16 bit relocation without overflow. */
330 HOWTO (R_PPC64_ADDR16_LO, /* type */
331 0, /* rightshift */
332 1, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_dont,/* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC64_ADDR16_LO", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xffff, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* Bits 16-31 of an address. */
345 HOWTO (R_PPC64_ADDR16_HI, /* type */
346 16, /* rightshift */
347 1, /* size (0 = byte, 1 = short, 2 = long) */
348 16, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC64_ADDR16_HI", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0xffff, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
360 bits, treated as a signed number, is negative. */
361 HOWTO (R_PPC64_ADDR16_HA, /* type */
362 16, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 ppc64_elf_ha_reloc, /* special_function */
369 "R_PPC64_ADDR16_HA", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* An absolute 16 bit branch; the lower two bits must be zero.
376 FIXME: we don't check that, we just clear them. */
377 HOWTO (R_PPC64_ADDR14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_ADDR14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 /* An absolute 16 bit branch, for which bit 10 should be set to
392 indicate that the branch is expected to be taken. The lower two
393 bits must be zero. */
394 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_ADDR14_BRTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 /* An absolute 16 bit branch, for which bit 10 should be set to
409 indicate that the branch is not expected to be taken. The lower
410 two bits must be zero. */
411 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 FALSE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_ADDR14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 FALSE), /* pcrel_offset */
424
425 /* A relative 26 bit branch; the lower two bits must be zero. */
426 HOWTO (R_PPC64_REL24, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 26, /* bitsize */
430 TRUE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_branch_reloc, /* special_function */
434 "R_PPC64_REL24", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0x03fffffc, /* dst_mask */
438 TRUE), /* pcrel_offset */
439
440 /* A relative 16 bit branch; the lower two bits must be zero. */
441 HOWTO (R_PPC64_REL14, /* type */
442 0, /* rightshift */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 TRUE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_branch_reloc, /* special_function */
449 "R_PPC64_REL14", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0x0000fffc, /* dst_mask */
453 TRUE), /* pcrel_offset */
454
455 /* A relative 16 bit branch. Bit 10 should be set to indicate that
456 the branch is expected to be taken. The lower two bits must be
457 zero. */
458 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
459 0, /* rightshift */
460 2, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 TRUE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_signed, /* complain_on_overflow */
465 ppc64_elf_brtaken_reloc, /* special_function */
466 "R_PPC64_REL14_BRTAKEN", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0x0000fffc, /* dst_mask */
470 TRUE), /* pcrel_offset */
471
472 /* A relative 16 bit branch. Bit 10 should be set to indicate that
473 the branch is not expected to be taken. The lower two bits must
474 be zero. */
475 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
476 0, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 TRUE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_signed, /* complain_on_overflow */
482 ppc64_elf_brtaken_reloc, /* special_function */
483 "R_PPC64_REL14_BRNTAKEN",/* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0x0000fffc, /* dst_mask */
487 TRUE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
490 symbol. */
491 HOWTO (R_PPC64_GOT16, /* type */
492 0, /* rightshift */
493 1, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_signed, /* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GOT16", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xffff, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
506 the symbol. */
507 HOWTO (R_PPC64_GOT16_LO, /* type */
508 0, /* rightshift */
509 1, /* size (0 = byte, 1 = short, 2 = long) */
510 16, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_GOT16_LO", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0xffff, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
522 the symbol. */
523 HOWTO (R_PPC64_GOT16_HI, /* type */
524 16, /* rightshift */
525 1, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_signed,/* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GOT16_HI", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0xffff, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
538 the symbol. */
539 HOWTO (R_PPC64_GOT16_HA, /* type */
540 16, /* rightshift */
541 1, /* size (0 = byte, 1 = short, 2 = long) */
542 16, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_signed,/* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_GOT16_HA", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* This is used only by the dynamic linker. The symbol should exist
554 both in the object being run and in some shared library. The
555 dynamic linker copies the data addressed by the symbol from the
556 shared library into the object, because the object being
557 run has to have the data at some particular address. */
558 HOWTO (R_PPC64_COPY, /* type */
559 0, /* rightshift */
560 0, /* this one is variable size */
561 0, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 ppc64_elf_unhandled_reloc, /* special_function */
566 "R_PPC64_COPY", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR64, but used when setting global offset table
573 entries. */
574 HOWTO (R_PPC64_GLOB_DAT, /* type */
575 0, /* rightshift */
576 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
577 64, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_dont, /* complain_on_overflow */
581 ppc64_elf_unhandled_reloc, /* special_function */
582 "R_PPC64_GLOB_DAT", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 ONES (64), /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* Created by the link editor. Marks a procedure linkage table
589 entry for a symbol. */
590 HOWTO (R_PPC64_JMP_SLOT, /* type */
591 0, /* rightshift */
592 0, /* size (0 = byte, 1 = short, 2 = long) */
593 0, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_dont, /* complain_on_overflow */
597 ppc64_elf_unhandled_reloc, /* special_function */
598 "R_PPC64_JMP_SLOT", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* Used only by the dynamic linker. When the object is run, this
605 doubleword64 is set to the load address of the object, plus the
606 addend. */
607 HOWTO (R_PPC64_RELATIVE, /* type */
608 0, /* rightshift */
609 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
610 64, /* bitsize */
611 FALSE, /* pc_relative */
612 0, /* bitpos */
613 complain_overflow_dont, /* complain_on_overflow */
614 bfd_elf_generic_reloc, /* special_function */
615 "R_PPC64_RELATIVE", /* name */
616 FALSE, /* partial_inplace */
617 0, /* src_mask */
618 ONES (64), /* dst_mask */
619 FALSE), /* pcrel_offset */
620
621 /* Like R_PPC64_ADDR32, but may be unaligned. */
622 HOWTO (R_PPC64_UADDR32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC64_UADDR32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffffffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16, but may be unaligned. */
637 HOWTO (R_PPC64_UADDR16, /* type */
638 0, /* rightshift */
639 1, /* size (0 = byte, 1 = short, 2 = long) */
640 16, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_bitfield, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_UADDR16", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffff, /* dst_mask */
649 FALSE), /* pcrel_offset */
650
651 /* 32-bit PC relative. */
652 HOWTO (R_PPC64_REL32, /* type */
653 0, /* rightshift */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
655 32, /* bitsize */
656 TRUE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_signed, /* complain_on_overflow */
659 bfd_elf_generic_reloc, /* special_function */
660 "R_PPC64_REL32", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffffffff, /* dst_mask */
664 TRUE), /* pcrel_offset */
665
666 /* 32-bit relocation to the symbol's procedure linkage table. */
667 HOWTO (R_PPC64_PLT32, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 32, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT32", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffffffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
682 FIXME: R_PPC64_PLTREL32 not supported. */
683 HOWTO (R_PPC64_PLTREL32, /* type */
684 0, /* rightshift */
685 2, /* size (0 = byte, 1 = short, 2 = long) */
686 32, /* bitsize */
687 TRUE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_signed, /* complain_on_overflow */
690 ppc64_elf_unhandled_reloc, /* special_function */
691 "R_PPC64_PLTREL32", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffffffff, /* dst_mask */
695 TRUE), /* pcrel_offset */
696
697 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
698 the symbol. */
699 HOWTO (R_PPC64_PLT16_LO, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_unhandled_reloc, /* special_function */
707 "R_PPC64_PLT16_LO", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
714 the symbol. */
715 HOWTO (R_PPC64_PLT16_HI, /* type */
716 16, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_signed, /* complain_on_overflow */
722 ppc64_elf_unhandled_reloc, /* special_function */
723 "R_PPC64_PLT16_HI", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
730 the symbol. */
731 HOWTO (R_PPC64_PLT16_HA, /* type */
732 16, /* rightshift */
733 1, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 FALSE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_signed, /* complain_on_overflow */
738 ppc64_elf_unhandled_reloc, /* special_function */
739 "R_PPC64_PLT16_HA", /* name */
740 FALSE, /* partial_inplace */
741 0, /* src_mask */
742 0xffff, /* dst_mask */
743 FALSE), /* pcrel_offset */
744
745 /* 16-bit section relative relocation. */
746 HOWTO (R_PPC64_SECTOFF, /* type */
747 0, /* rightshift */
748 1, /* size (0 = byte, 1 = short, 2 = long) */
749 16, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_signed, /* complain_on_overflow */
753 ppc64_elf_sectoff_reloc, /* special_function */
754 "R_PPC64_SECTOFF", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 0xffff, /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* Like R_PPC64_SECTOFF, but no overflow warning. */
761 HOWTO (R_PPC64_SECTOFF_LO, /* type */
762 0, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 ppc64_elf_sectoff_reloc, /* special_function */
769 "R_PPC64_SECTOFF_LO", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* 16-bit upper half section relative relocation. */
776 HOWTO (R_PPC64_SECTOFF_HI, /* type */
777 16, /* rightshift */
778 1, /* size (0 = byte, 1 = short, 2 = long) */
779 16, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_signed, /* complain_on_overflow */
783 ppc64_elf_sectoff_reloc, /* special_function */
784 "R_PPC64_SECTOFF_HI", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0xffff, /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* 16-bit upper half adjusted section relative relocation. */
791 HOWTO (R_PPC64_SECTOFF_HA, /* type */
792 16, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_signed, /* complain_on_overflow */
798 ppc64_elf_sectoff_ha_reloc, /* special_function */
799 "R_PPC64_SECTOFF_HA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* Like R_PPC64_REL24 without touching the two least significant bits. */
806 HOWTO (R_PPC64_REL30, /* type */
807 2, /* rightshift */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
809 30, /* bitsize */
810 TRUE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_REL30", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xfffffffc, /* dst_mask */
818 TRUE), /* pcrel_offset */
819
820 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
821
822 /* A standard 64-bit relocation. */
823 HOWTO (R_PPC64_ADDR64, /* type */
824 0, /* rightshift */
825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
826 64, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR64", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 ONES (64), /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 32-47 of an address. */
838 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
839 32, /* rightshift */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
841 16, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_ADDR16_HIGHER", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* The bits 32-47 of an address, plus 1 if the contents of the low
853 16 bits, treated as a signed number, is negative. */
854 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
855 32, /* rightshift */
856 1, /* size (0 = byte, 1 = short, 2 = long) */
857 16, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 ppc64_elf_ha_reloc, /* special_function */
862 "R_PPC64_ADDR16_HIGHERA", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 0xffff, /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* The bits 48-63 of an address. */
869 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
870 48, /* rightshift */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
872 16, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_ADDR16_HIGHEST", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* The bits 48-63 of an address, plus 1 if the contents of the low
884 16 bits, treated as a signed number, is negative. */
885 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
886 48, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_dont, /* complain_on_overflow */
892 ppc64_elf_ha_reloc, /* special_function */
893 "R_PPC64_ADDR16_HIGHESTA", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* Like ADDR64, but may be unaligned. */
900 HOWTO (R_PPC64_UADDR64, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_PPC64_UADDR64", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 64-bit relative relocation. */
915 HOWTO (R_PPC64_REL64, /* type */
916 0, /* rightshift */
917 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
918 64, /* bitsize */
919 TRUE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_dont, /* complain_on_overflow */
922 bfd_elf_generic_reloc, /* special_function */
923 "R_PPC64_REL64", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 ONES (64), /* dst_mask */
927 TRUE), /* pcrel_offset */
928
929 /* 64-bit relocation to the symbol's procedure linkage table. */
930 HOWTO (R_PPC64_PLT64, /* type */
931 0, /* rightshift */
932 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
933 64, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 ppc64_elf_unhandled_reloc, /* special_function */
938 "R_PPC64_PLT64", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 ONES (64), /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 64-bit PC relative relocation to the symbol's procedure linkage
945 table. */
946 /* FIXME: R_PPC64_PLTREL64 not supported. */
947 HOWTO (R_PPC64_PLTREL64, /* type */
948 0, /* rightshift */
949 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
950 64, /* bitsize */
951 TRUE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc64_elf_unhandled_reloc, /* special_function */
955 "R_PPC64_PLTREL64", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 ONES (64), /* dst_mask */
959 TRUE), /* pcrel_offset */
960
961 /* 16 bit TOC-relative relocation. */
962
963 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
964 HOWTO (R_PPC64_TOC16, /* type */
965 0, /* rightshift */
966 1, /* size (0 = byte, 1 = short, 2 = long) */
967 16, /* bitsize */
968 FALSE, /* pc_relative */
969 0, /* bitpos */
970 complain_overflow_signed, /* complain_on_overflow */
971 ppc64_elf_toc_reloc, /* special_function */
972 "R_PPC64_TOC16", /* name */
973 FALSE, /* partial_inplace */
974 0, /* src_mask */
975 0xffff, /* dst_mask */
976 FALSE), /* pcrel_offset */
977
978 /* 16 bit TOC-relative relocation without overflow. */
979
980 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
981 HOWTO (R_PPC64_TOC16_LO, /* type */
982 0, /* rightshift */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
984 16, /* bitsize */
985 FALSE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 ppc64_elf_toc_reloc, /* special_function */
989 "R_PPC64_TOC16_LO", /* name */
990 FALSE, /* partial_inplace */
991 0, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE), /* pcrel_offset */
994
995 /* 16 bit TOC-relative relocation, high 16 bits. */
996
997 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
998 HOWTO (R_PPC64_TOC16_HI, /* type */
999 16, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_signed, /* complain_on_overflow */
1005 ppc64_elf_toc_reloc, /* special_function */
1006 "R_PPC64_TOC16_HI", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1013 contents of the low 16 bits, treated as a signed number, is
1014 negative. */
1015
1016 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1017 HOWTO (R_PPC64_TOC16_HA, /* type */
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_signed, /* complain_on_overflow */
1024 ppc64_elf_toc_ha_reloc, /* special_function */
1025 "R_PPC64_TOC16_HA", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1032
1033 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1034 HOWTO (R_PPC64_TOC, /* type */
1035 0, /* rightshift */
1036 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1037 64, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_dont, /* complain_on_overflow */
1041 ppc64_elf_toc64_reloc, /* special_function */
1042 "R_PPC64_TOC", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 ONES (64), /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_GOT16, but also informs the link editor that the
1049 value to relocate may (!) refer to a PLT entry which the link
1050 editor (a) may replace with the symbol value. If the link editor
1051 is unable to fully resolve the symbol, it may (b) create a PLT
1052 entry and store the address to the new PLT entry in the GOT.
1053 This permits lazy resolution of function symbols at run time.
1054 The link editor may also skip all of this and just (c) emit a
1055 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1056 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16, /* type */
1058 0, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_signed, /* complain_on_overflow */
1064 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_PLTGOT16, but without overflow. */
1072 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1073 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc64_elf_unhandled_reloc, /* special_function */
1081 "R_PPC64_PLTGOT16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1088 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1089 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_PLTGOT16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1104 1 if the contents of the low 16 bits, treated as a signed number,
1105 is negative. */
1106 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1107 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1108 16, /* rightshift */
1109 1, /* size (0 = byte, 1 = short, 2 = long) */
1110 16, /* bitsize */
1111 FALSE, /* pc_relative */
1112 0, /* bitpos */
1113 complain_overflow_signed, /* complain_on_overflow */
1114 ppc64_elf_unhandled_reloc, /* special_function */
1115 "R_PPC64_PLTGOT16_HA", /* name */
1116 FALSE, /* partial_inplace */
1117 0, /* src_mask */
1118 0xffff, /* dst_mask */
1119 FALSE), /* pcrel_offset */
1120
1121 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1122 HOWTO (R_PPC64_ADDR16_DS, /* type */
1123 0, /* rightshift */
1124 1, /* size (0 = byte, 1 = short, 2 = long) */
1125 16, /* bitsize */
1126 FALSE, /* pc_relative */
1127 0, /* bitpos */
1128 complain_overflow_signed, /* complain_on_overflow */
1129 bfd_elf_generic_reloc, /* special_function */
1130 "R_PPC64_ADDR16_DS", /* name */
1131 FALSE, /* partial_inplace */
1132 0, /* src_mask */
1133 0xfffc, /* dst_mask */
1134 FALSE), /* pcrel_offset */
1135
1136 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1137 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1138 0, /* rightshift */
1139 1, /* size (0 = byte, 1 = short, 2 = long) */
1140 16, /* bitsize */
1141 FALSE, /* pc_relative */
1142 0, /* bitpos */
1143 complain_overflow_dont,/* complain_on_overflow */
1144 bfd_elf_generic_reloc, /* special_function */
1145 "R_PPC64_ADDR16_LO_DS",/* name */
1146 FALSE, /* partial_inplace */
1147 0, /* src_mask */
1148 0xfffc, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1150
1151 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1152 HOWTO (R_PPC64_GOT16_DS, /* type */
1153 0, /* rightshift */
1154 1, /* size (0 = byte, 1 = short, 2 = long) */
1155 16, /* bitsize */
1156 FALSE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_signed, /* complain_on_overflow */
1159 ppc64_elf_unhandled_reloc, /* special_function */
1160 "R_PPC64_GOT16_DS", /* name */
1161 FALSE, /* partial_inplace */
1162 0, /* src_mask */
1163 0xfffc, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1165
1166 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1167 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1168 0, /* rightshift */
1169 1, /* size (0 = byte, 1 = short, 2 = long) */
1170 16, /* bitsize */
1171 FALSE, /* pc_relative */
1172 0, /* bitpos */
1173 complain_overflow_dont, /* complain_on_overflow */
1174 ppc64_elf_unhandled_reloc, /* special_function */
1175 "R_PPC64_GOT16_LO_DS", /* name */
1176 FALSE, /* partial_inplace */
1177 0, /* src_mask */
1178 0xfffc, /* dst_mask */
1179 FALSE), /* pcrel_offset */
1180
1181 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1182 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1183 0, /* rightshift */
1184 1, /* size (0 = byte, 1 = short, 2 = long) */
1185 16, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_dont, /* complain_on_overflow */
1189 ppc64_elf_unhandled_reloc, /* special_function */
1190 "R_PPC64_PLT16_LO_DS", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xfffc, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1197 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_signed, /* complain_on_overflow */
1204 ppc64_elf_sectoff_reloc, /* special_function */
1205 "R_PPC64_SECTOFF_DS", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1212 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 ppc64_elf_sectoff_reloc, /* special_function */
1220 "R_PPC64_SECTOFF_LO_DS",/* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1227 HOWTO (R_PPC64_TOC16_DS, /* type */
1228 0, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_signed, /* complain_on_overflow */
1234 ppc64_elf_toc_reloc, /* special_function */
1235 "R_PPC64_TOC16_DS", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xfffc, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1242 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1243 0, /* rightshift */
1244 1, /* size (0 = byte, 1 = short, 2 = long) */
1245 16, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_toc_reloc, /* special_function */
1250 "R_PPC64_TOC16_LO_DS", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0xfffc, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1257 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1258 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1259 0, /* rightshift */
1260 1, /* size (0 = byte, 1 = short, 2 = long) */
1261 16, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_signed, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_PLTGOT16_DS", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 0xfffc, /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1273 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1274 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_dont, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_PLTGOT16_LO_DS",/* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xfffc, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Marker relocs for TLS. */
1289 HOWTO (R_PPC64_TLS,
1290 0, /* rightshift */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1292 32, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 "R_PPC64_TLS", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 HOWTO (R_PPC64_TLSGD,
1304 0, /* rightshift */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1306 32, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 bfd_elf_generic_reloc, /* special_function */
1311 "R_PPC64_TLSGD", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 HOWTO (R_PPC64_TLSLD,
1318 0, /* rightshift */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1320 32, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_PPC64_TLSLD", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 HOWTO (R_PPC64_TOCSAVE,
1332 0, /* rightshift */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1334 32, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC64_TOCSAVE", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Computes the load module index of the load module that contains the
1346 definition of its TLS sym. */
1347 HOWTO (R_PPC64_DTPMOD64,
1348 0, /* rightshift */
1349 4, /* size (0 = byte, 1 = short, 2 = long) */
1350 64, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPMOD64", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 ONES (64), /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Computes a dtv-relative displacement, the difference between the value
1362 of sym+add and the base address of the thread-local storage block that
1363 contains the definition of sym, minus 0x8000. */
1364 HOWTO (R_PPC64_DTPREL64,
1365 0, /* rightshift */
1366 4, /* size (0 = byte, 1 = short, 2 = long) */
1367 64, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL64", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 ONES (64), /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* A 16 bit dtprel reloc. */
1379 HOWTO (R_PPC64_DTPREL16,
1380 0, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_signed, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but no overflow. */
1394 HOWTO (R_PPC64_DTPREL16_LO,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_dont, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_LO", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1409 HOWTO (R_PPC64_DTPREL16_HI,
1410 16, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_signed, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_HI", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1424 HOWTO (R_PPC64_DTPREL16_HA,
1425 16, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_signed, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_DTPREL16_HA", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1439 HOWTO (R_PPC64_DTPREL16_HIGHER,
1440 32, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_DTPREL16_HIGHER", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1454 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1455 32, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_DTPREL16_HIGHERA", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1469 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1470 48, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_DTPREL16_HIGHEST", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1484 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1485 48, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like DTPREL16, but for insns with a DS field. */
1499 HOWTO (R_PPC64_DTPREL16_DS,
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_DTPREL16_DS", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xfffc, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like DTPREL16_DS, but no overflow. */
1514 HOWTO (R_PPC64_DTPREL16_LO_DS,
1515 0, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_DTPREL16_LO_DS", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xfffc, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Computes a tp-relative displacement, the difference between the value of
1529 sym+add and the value of the thread pointer (r13). */
1530 HOWTO (R_PPC64_TPREL64,
1531 0, /* rightshift */
1532 4, /* size (0 = byte, 1 = short, 2 = long) */
1533 64, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL64", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 ONES (64), /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* A 16 bit tprel reloc. */
1545 HOWTO (R_PPC64_TPREL16,
1546 0, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_signed, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but no overflow. */
1560 HOWTO (R_PPC64_TPREL16_LO,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_LO", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_LO, but next higher group of 16 bits. */
1575 HOWTO (R_PPC64_TPREL16_HI,
1576 16, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_signed, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_HI", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like TPREL16_HI, but adjust for low 16 bits. */
1590 HOWTO (R_PPC64_TPREL16_HA,
1591 16, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_signed, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_TPREL16_HA", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like TPREL16_HI, but next higher group of 16 bits. */
1605 HOWTO (R_PPC64_TPREL16_HIGHER,
1606 32, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_dont, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_TPREL16_HIGHER", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1620 HOWTO (R_PPC64_TPREL16_HIGHERA,
1621 32, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_TPREL16_HIGHERA", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_TPREL16_HIGHEST,
1636 48, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_TPREL16_HIGHEST", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1651 48, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_TPREL16_HIGHESTA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like TPREL16, but for insns with a DS field. */
1665 HOWTO (R_PPC64_TPREL16_DS,
1666 0, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_signed, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_TPREL16_DS", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xfffc, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like TPREL16_DS, but no overflow. */
1680 HOWTO (R_PPC64_TPREL16_LO_DS,
1681 0, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_TPREL16_LO_DS", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xfffc, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1695 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1696 to the first entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_TLSGD16,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSGD16", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSGD16, but no overflow. */
1712 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSGD16_LO", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_signed, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_TLSGD16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_signed, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_TLSGD16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1757 with values (sym+add)@dtpmod and zero, and computes the offset to the
1758 first entry relative to the TOC base (r2). */
1759 HOWTO (R_PPC64_GOT_TLSLD16,
1760 0, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_signed, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_TLSLD16", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xffff, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Like GOT_TLSLD16, but no overflow. */
1774 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_dont, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_TLSLD16_LO", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xffff, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1789 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1790 16, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TLSLD16_HI", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xffff, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1804 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_signed, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TLSLD16_HA", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1819 the offset to the entry relative to the TOC base (r2). */
1820 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1821 0, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_signed, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_DTPREL16_DS", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xfffc, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* Like GOT_DTPREL16_DS, but no overflow. */
1835 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1836 0, /* rightshift */
1837 1, /* size (0 = byte, 1 = short, 2 = long) */
1838 16, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 ppc64_elf_unhandled_reloc, /* special_function */
1843 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0xfffc, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1850 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1851 16, /* rightshift */
1852 1, /* size (0 = byte, 1 = short, 2 = long) */
1853 16, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_signed, /* complain_on_overflow */
1857 ppc64_elf_unhandled_reloc, /* special_function */
1858 "R_PPC64_GOT_DTPREL16_HI", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0xffff, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863
1864 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1865 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1866 16, /* rightshift */
1867 1, /* size (0 = byte, 1 = short, 2 = long) */
1868 16, /* bitsize */
1869 FALSE, /* pc_relative */
1870 0, /* bitpos */
1871 complain_overflow_signed, /* complain_on_overflow */
1872 ppc64_elf_unhandled_reloc, /* special_function */
1873 "R_PPC64_GOT_DTPREL16_HA", /* name */
1874 FALSE, /* partial_inplace */
1875 0, /* src_mask */
1876 0xffff, /* dst_mask */
1877 FALSE), /* pcrel_offset */
1878
1879 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1880 offset to the entry relative to the TOC base (r2). */
1881 HOWTO (R_PPC64_GOT_TPREL16_DS,
1882 0, /* rightshift */
1883 1, /* size (0 = byte, 1 = short, 2 = long) */
1884 16, /* bitsize */
1885 FALSE, /* pc_relative */
1886 0, /* bitpos */
1887 complain_overflow_signed, /* complain_on_overflow */
1888 ppc64_elf_unhandled_reloc, /* special_function */
1889 "R_PPC64_GOT_TPREL16_DS", /* name */
1890 FALSE, /* partial_inplace */
1891 0, /* src_mask */
1892 0xfffc, /* dst_mask */
1893 FALSE), /* pcrel_offset */
1894
1895 /* Like GOT_TPREL16_DS, but no overflow. */
1896 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1897 0, /* rightshift */
1898 1, /* size (0 = byte, 1 = short, 2 = long) */
1899 16, /* bitsize */
1900 FALSE, /* pc_relative */
1901 0, /* bitpos */
1902 complain_overflow_dont, /* complain_on_overflow */
1903 ppc64_elf_unhandled_reloc, /* special_function */
1904 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1905 FALSE, /* partial_inplace */
1906 0, /* src_mask */
1907 0xfffc, /* dst_mask */
1908 FALSE), /* pcrel_offset */
1909
1910 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1911 HOWTO (R_PPC64_GOT_TPREL16_HI,
1912 16, /* rightshift */
1913 1, /* size (0 = byte, 1 = short, 2 = long) */
1914 16, /* bitsize */
1915 FALSE, /* pc_relative */
1916 0, /* bitpos */
1917 complain_overflow_signed, /* complain_on_overflow */
1918 ppc64_elf_unhandled_reloc, /* special_function */
1919 "R_PPC64_GOT_TPREL16_HI", /* name */
1920 FALSE, /* partial_inplace */
1921 0, /* src_mask */
1922 0xffff, /* dst_mask */
1923 FALSE), /* pcrel_offset */
1924
1925 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1926 HOWTO (R_PPC64_GOT_TPREL16_HA,
1927 16, /* rightshift */
1928 1, /* size (0 = byte, 1 = short, 2 = long) */
1929 16, /* bitsize */
1930 FALSE, /* pc_relative */
1931 0, /* bitpos */
1932 complain_overflow_signed, /* complain_on_overflow */
1933 ppc64_elf_unhandled_reloc, /* special_function */
1934 "R_PPC64_GOT_TPREL16_HA", /* name */
1935 FALSE, /* partial_inplace */
1936 0, /* src_mask */
1937 0xffff, /* dst_mask */
1938 FALSE), /* pcrel_offset */
1939
1940 HOWTO (R_PPC64_JMP_IREL, /* type */
1941 0, /* rightshift */
1942 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1943 0, /* bitsize */
1944 FALSE, /* pc_relative */
1945 0, /* bitpos */
1946 complain_overflow_dont, /* complain_on_overflow */
1947 ppc64_elf_unhandled_reloc, /* special_function */
1948 "R_PPC64_JMP_IREL", /* name */
1949 FALSE, /* partial_inplace */
1950 0, /* src_mask */
1951 0, /* dst_mask */
1952 FALSE), /* pcrel_offset */
1953
1954 HOWTO (R_PPC64_IRELATIVE, /* type */
1955 0, /* rightshift */
1956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1957 64, /* bitsize */
1958 FALSE, /* pc_relative */
1959 0, /* bitpos */
1960 complain_overflow_dont, /* complain_on_overflow */
1961 bfd_elf_generic_reloc, /* special_function */
1962 "R_PPC64_IRELATIVE", /* name */
1963 FALSE, /* partial_inplace */
1964 0, /* src_mask */
1965 ONES (64), /* dst_mask */
1966 FALSE), /* pcrel_offset */
1967
1968 /* A 16 bit relative relocation. */
1969 HOWTO (R_PPC64_REL16, /* type */
1970 0, /* rightshift */
1971 1, /* size (0 = byte, 1 = short, 2 = long) */
1972 16, /* bitsize */
1973 TRUE, /* pc_relative */
1974 0, /* bitpos */
1975 complain_overflow_signed, /* complain_on_overflow */
1976 bfd_elf_generic_reloc, /* special_function */
1977 "R_PPC64_REL16", /* name */
1978 FALSE, /* partial_inplace */
1979 0, /* src_mask */
1980 0xffff, /* dst_mask */
1981 TRUE), /* pcrel_offset */
1982
1983 /* A 16 bit relative relocation without overflow. */
1984 HOWTO (R_PPC64_REL16_LO, /* type */
1985 0, /* rightshift */
1986 1, /* size (0 = byte, 1 = short, 2 = long) */
1987 16, /* bitsize */
1988 TRUE, /* pc_relative */
1989 0, /* bitpos */
1990 complain_overflow_dont,/* complain_on_overflow */
1991 bfd_elf_generic_reloc, /* special_function */
1992 "R_PPC64_REL16_LO", /* name */
1993 FALSE, /* partial_inplace */
1994 0, /* src_mask */
1995 0xffff, /* dst_mask */
1996 TRUE), /* pcrel_offset */
1997
1998 /* The high order 16 bits of a relative address. */
1999 HOWTO (R_PPC64_REL16_HI, /* type */
2000 16, /* rightshift */
2001 1, /* size (0 = byte, 1 = short, 2 = long) */
2002 16, /* bitsize */
2003 TRUE, /* pc_relative */
2004 0, /* bitpos */
2005 complain_overflow_signed, /* complain_on_overflow */
2006 bfd_elf_generic_reloc, /* special_function */
2007 "R_PPC64_REL16_HI", /* name */
2008 FALSE, /* partial_inplace */
2009 0, /* src_mask */
2010 0xffff, /* dst_mask */
2011 TRUE), /* pcrel_offset */
2012
2013 /* The high order 16 bits of a relative address, plus 1 if the contents of
2014 the low 16 bits, treated as a signed number, is negative. */
2015 HOWTO (R_PPC64_REL16_HA, /* type */
2016 16, /* rightshift */
2017 1, /* size (0 = byte, 1 = short, 2 = long) */
2018 16, /* bitsize */
2019 TRUE, /* pc_relative */
2020 0, /* bitpos */
2021 complain_overflow_signed, /* complain_on_overflow */
2022 ppc64_elf_ha_reloc, /* special_function */
2023 "R_PPC64_REL16_HA", /* name */
2024 FALSE, /* partial_inplace */
2025 0, /* src_mask */
2026 0xffff, /* dst_mask */
2027 TRUE), /* pcrel_offset */
2028
2029 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2030 HOWTO (R_PPC64_REL16DX_HA, /* type */
2031 16, /* rightshift */
2032 2, /* size (0 = byte, 1 = short, 2 = long) */
2033 16, /* bitsize */
2034 TRUE, /* pc_relative */
2035 0, /* bitpos */
2036 complain_overflow_signed, /* complain_on_overflow */
2037 ppc64_elf_ha_reloc, /* special_function */
2038 "R_PPC64_REL16DX_HA", /* name */
2039 FALSE, /* partial_inplace */
2040 0, /* src_mask */
2041 0x1fffc1, /* dst_mask */
2042 TRUE), /* pcrel_offset */
2043
2044 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2045 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2046 16, /* rightshift */
2047 1, /* size (0 = byte, 1 = short, 2 = long) */
2048 16, /* bitsize */
2049 FALSE, /* pc_relative */
2050 0, /* bitpos */
2051 complain_overflow_dont, /* complain_on_overflow */
2052 bfd_elf_generic_reloc, /* special_function */
2053 "R_PPC64_ADDR16_HIGH", /* name */
2054 FALSE, /* partial_inplace */
2055 0, /* src_mask */
2056 0xffff, /* dst_mask */
2057 FALSE), /* pcrel_offset */
2058
2059 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2060 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2061 16, /* rightshift */
2062 1, /* size (0 = byte, 1 = short, 2 = long) */
2063 16, /* bitsize */
2064 FALSE, /* pc_relative */
2065 0, /* bitpos */
2066 complain_overflow_dont, /* complain_on_overflow */
2067 ppc64_elf_ha_reloc, /* special_function */
2068 "R_PPC64_ADDR16_HIGHA", /* name */
2069 FALSE, /* partial_inplace */
2070 0, /* src_mask */
2071 0xffff, /* dst_mask */
2072 FALSE), /* pcrel_offset */
2073
2074 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2075 HOWTO (R_PPC64_DTPREL16_HIGH,
2076 16, /* rightshift */
2077 1, /* size (0 = byte, 1 = short, 2 = long) */
2078 16, /* bitsize */
2079 FALSE, /* pc_relative */
2080 0, /* bitpos */
2081 complain_overflow_dont, /* complain_on_overflow */
2082 ppc64_elf_unhandled_reloc, /* special_function */
2083 "R_PPC64_DTPREL16_HIGH", /* name */
2084 FALSE, /* partial_inplace */
2085 0, /* src_mask */
2086 0xffff, /* dst_mask */
2087 FALSE), /* pcrel_offset */
2088
2089 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2090 HOWTO (R_PPC64_DTPREL16_HIGHA,
2091 16, /* rightshift */
2092 1, /* size (0 = byte, 1 = short, 2 = long) */
2093 16, /* bitsize */
2094 FALSE, /* pc_relative */
2095 0, /* bitpos */
2096 complain_overflow_dont, /* complain_on_overflow */
2097 ppc64_elf_unhandled_reloc, /* special_function */
2098 "R_PPC64_DTPREL16_HIGHA", /* name */
2099 FALSE, /* partial_inplace */
2100 0, /* src_mask */
2101 0xffff, /* dst_mask */
2102 FALSE), /* pcrel_offset */
2103
2104 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2105 HOWTO (R_PPC64_TPREL16_HIGH,
2106 16, /* rightshift */
2107 1, /* size (0 = byte, 1 = short, 2 = long) */
2108 16, /* bitsize */
2109 FALSE, /* pc_relative */
2110 0, /* bitpos */
2111 complain_overflow_dont, /* complain_on_overflow */
2112 ppc64_elf_unhandled_reloc, /* special_function */
2113 "R_PPC64_TPREL16_HIGH", /* name */
2114 FALSE, /* partial_inplace */
2115 0, /* src_mask */
2116 0xffff, /* dst_mask */
2117 FALSE), /* pcrel_offset */
2118
2119 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2120 HOWTO (R_PPC64_TPREL16_HIGHA,
2121 16, /* rightshift */
2122 1, /* size (0 = byte, 1 = short, 2 = long) */
2123 16, /* bitsize */
2124 FALSE, /* pc_relative */
2125 0, /* bitpos */
2126 complain_overflow_dont, /* complain_on_overflow */
2127 ppc64_elf_unhandled_reloc, /* special_function */
2128 "R_PPC64_TPREL16_HIGHA", /* name */
2129 FALSE, /* partial_inplace */
2130 0, /* src_mask */
2131 0xffff, /* dst_mask */
2132 FALSE), /* pcrel_offset */
2133
2134 /* Marker reloc on ELFv2 large-model function entry. */
2135 HOWTO (R_PPC64_ENTRY,
2136 0, /* rightshift */
2137 2, /* size (0 = byte, 1 = short, 2 = long) */
2138 32, /* bitsize */
2139 FALSE, /* pc_relative */
2140 0, /* bitpos */
2141 complain_overflow_dont, /* complain_on_overflow */
2142 bfd_elf_generic_reloc, /* special_function */
2143 "R_PPC64_ENTRY", /* name */
2144 FALSE, /* partial_inplace */
2145 0, /* src_mask */
2146 0, /* dst_mask */
2147 FALSE), /* pcrel_offset */
2148
2149 /* Like ADDR64, but use local entry point of function. */
2150 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2151 0, /* rightshift */
2152 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2153 64, /* bitsize */
2154 FALSE, /* pc_relative */
2155 0, /* bitpos */
2156 complain_overflow_dont, /* complain_on_overflow */
2157 bfd_elf_generic_reloc, /* special_function */
2158 "R_PPC64_ADDR64_LOCAL", /* name */
2159 FALSE, /* partial_inplace */
2160 0, /* src_mask */
2161 ONES (64), /* dst_mask */
2162 FALSE), /* pcrel_offset */
2163
2164 /* GNU extension to record C++ vtable hierarchy. */
2165 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2166 0, /* rightshift */
2167 0, /* size (0 = byte, 1 = short, 2 = long) */
2168 0, /* bitsize */
2169 FALSE, /* pc_relative */
2170 0, /* bitpos */
2171 complain_overflow_dont, /* complain_on_overflow */
2172 NULL, /* special_function */
2173 "R_PPC64_GNU_VTINHERIT", /* name */
2174 FALSE, /* partial_inplace */
2175 0, /* src_mask */
2176 0, /* dst_mask */
2177 FALSE), /* pcrel_offset */
2178
2179 /* GNU extension to record C++ vtable member usage. */
2180 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2181 0, /* rightshift */
2182 0, /* size (0 = byte, 1 = short, 2 = long) */
2183 0, /* bitsize */
2184 FALSE, /* pc_relative */
2185 0, /* bitpos */
2186 complain_overflow_dont, /* complain_on_overflow */
2187 NULL, /* special_function */
2188 "R_PPC64_GNU_VTENTRY", /* name */
2189 FALSE, /* partial_inplace */
2190 0, /* src_mask */
2191 0, /* dst_mask */
2192 FALSE), /* pcrel_offset */
2193 };
2194
2195 \f
2196 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2197 be done. */
2198
2199 static void
2200 ppc_howto_init (void)
2201 {
2202 unsigned int i, type;
2203
2204 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2205 {
2206 type = ppc64_elf_howto_raw[i].type;
2207 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2208 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2209 }
2210 }
2211
2212 static reloc_howto_type *
2213 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2214 bfd_reloc_code_real_type code)
2215 {
2216 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2217
2218 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2219 /* Initialize howto table if needed. */
2220 ppc_howto_init ();
2221
2222 switch (code)
2223 {
2224 default:
2225 return NULL;
2226
2227 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2228 break;
2229 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2230 break;
2231 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2232 break;
2233 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2234 break;
2235 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2236 break;
2237 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2238 break;
2239 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2240 break;
2241 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2242 break;
2243 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2244 break;
2245 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2246 break;
2247 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2248 break;
2249 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2250 break;
2251 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2252 break;
2253 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2254 break;
2255 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2256 break;
2257 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2258 break;
2259 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2260 break;
2261 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2262 break;
2263 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2266 break;
2267 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2268 break;
2269 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2270 break;
2271 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2272 break;
2273 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2274 break;
2275 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2276 break;
2277 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2278 break;
2279 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2280 break;
2281 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2282 break;
2283 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2284 break;
2285 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2286 break;
2287 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2288 break;
2289 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2290 break;
2291 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2292 break;
2293 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2294 break;
2295 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2296 break;
2297 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2298 break;
2299 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2300 break;
2301 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2302 break;
2303 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2304 break;
2305 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2306 break;
2307 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2308 break;
2309 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2310 break;
2311 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2312 break;
2313 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2314 break;
2315 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2316 break;
2317 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2318 break;
2319 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2320 break;
2321 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2322 break;
2323 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2324 break;
2325 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2326 break;
2327 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2328 break;
2329 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2330 break;
2331 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2332 break;
2333 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2334 break;
2335 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2336 break;
2337 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2338 break;
2339 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2340 break;
2341 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2342 break;
2343 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2346 break;
2347 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2348 break;
2349 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2350 break;
2351 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2352 break;
2353 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2354 break;
2355 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2356 break;
2357 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2358 break;
2359 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2360 break;
2361 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2362 break;
2363 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2364 break;
2365 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2368 break;
2369 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2370 break;
2371 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2372 break;
2373 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2374 break;
2375 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2376 break;
2377 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2378 break;
2379 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2382 break;
2383 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2384 break;
2385 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2386 break;
2387 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2388 break;
2389 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2390 break;
2391 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2392 break;
2393 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2394 break;
2395 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2396 break;
2397 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2398 break;
2399 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2400 break;
2401 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2402 break;
2403 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2408 break;
2409 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2410 break;
2411 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2412 break;
2413 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2414 break;
2415 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2416 break;
2417 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2418 break;
2419 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2422 break;
2423 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2426 break;
2427 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2428 break;
2429 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2436 break;
2437 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2440 break;
2441 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2442 break;
2443 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2444 break;
2445 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2446 break;
2447 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2448 break;
2449 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2450 break;
2451 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2452 break;
2453 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2454 break;
2455 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2456 break;
2457 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2458 break;
2459 }
2460
2461 return ppc64_elf_howto_table[r];
2462 };
2463
2464 static reloc_howto_type *
2465 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2466 const char *r_name)
2467 {
2468 unsigned int i;
2469
2470 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2471 if (ppc64_elf_howto_raw[i].name != NULL
2472 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2473 return &ppc64_elf_howto_raw[i];
2474
2475 return NULL;
2476 }
2477
2478 /* Set the howto pointer for a PowerPC ELF reloc. */
2479
2480 static void
2481 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2482 Elf_Internal_Rela *dst)
2483 {
2484 unsigned int type;
2485
2486 /* Initialize howto table if needed. */
2487 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2488 ppc_howto_init ();
2489
2490 type = ELF64_R_TYPE (dst->r_info);
2491 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2492 {
2493 /* xgettext:c-format */
2494 _bfd_error_handler (_("%B: invalid relocation type %d"),
2495 abfd, (int) type);
2496 type = R_PPC64_NONE;
2497 }
2498 cache_ptr->howto = ppc64_elf_howto_table[type];
2499 }
2500
2501 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2502
2503 static bfd_reloc_status_type
2504 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2505 void *data, asection *input_section,
2506 bfd *output_bfd, char **error_message)
2507 {
2508 enum elf_ppc64_reloc_type r_type;
2509 long insn;
2510 bfd_size_type octets;
2511 bfd_vma value;
2512
2513 /* If this is a relocatable link (output_bfd test tells us), just
2514 call the generic function. Any adjustment will be done at final
2515 link time. */
2516 if (output_bfd != NULL)
2517 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2518 input_section, output_bfd, error_message);
2519
2520 /* Adjust the addend for sign extension of the low 16 bits.
2521 We won't actually be using the low 16 bits, so trashing them
2522 doesn't matter. */
2523 reloc_entry->addend += 0x8000;
2524 r_type = reloc_entry->howto->type;
2525 if (r_type != R_PPC64_REL16DX_HA)
2526 return bfd_reloc_continue;
2527
2528 value = 0;
2529 if (!bfd_is_com_section (symbol->section))
2530 value = symbol->value;
2531 value += (reloc_entry->addend
2532 + symbol->section->output_offset
2533 + symbol->section->output_section->vma);
2534 value -= (reloc_entry->address
2535 + input_section->output_offset
2536 + input_section->output_section->vma);
2537 value = (bfd_signed_vma) value >> 16;
2538
2539 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2540 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2541 insn &= ~0x1fffc1;
2542 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2543 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2544 if (value + 0x8000 > 0xffff)
2545 return bfd_reloc_overflow;
2546 return bfd_reloc_ok;
2547 }
2548
2549 static bfd_reloc_status_type
2550 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2551 void *data, asection *input_section,
2552 bfd *output_bfd, char **error_message)
2553 {
2554 if (output_bfd != NULL)
2555 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2556 input_section, output_bfd, error_message);
2557
2558 if (strcmp (symbol->section->name, ".opd") == 0
2559 && (symbol->section->owner->flags & DYNAMIC) == 0)
2560 {
2561 bfd_vma dest = opd_entry_value (symbol->section,
2562 symbol->value + reloc_entry->addend,
2563 NULL, NULL, FALSE);
2564 if (dest != (bfd_vma) -1)
2565 reloc_entry->addend = dest - (symbol->value
2566 + symbol->section->output_section->vma
2567 + symbol->section->output_offset);
2568 }
2569 else
2570 {
2571 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2572
2573 if (symbol->section->owner != abfd
2574 && symbol->section->owner != NULL
2575 && abiversion (symbol->section->owner) >= 2)
2576 {
2577 unsigned int i;
2578
2579 for (i = 0; i < symbol->section->owner->symcount; ++i)
2580 {
2581 asymbol *symdef = symbol->section->owner->outsymbols[i];
2582
2583 if (strcmp (symdef->name, symbol->name) == 0)
2584 {
2585 elfsym = (elf_symbol_type *) symdef;
2586 break;
2587 }
2588 }
2589 }
2590 reloc_entry->addend
2591 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2592 }
2593 return bfd_reloc_continue;
2594 }
2595
2596 static bfd_reloc_status_type
2597 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2598 void *data, asection *input_section,
2599 bfd *output_bfd, char **error_message)
2600 {
2601 long insn;
2602 enum elf_ppc64_reloc_type r_type;
2603 bfd_size_type octets;
2604 /* Assume 'at' branch hints. */
2605 bfd_boolean is_isa_v2 = TRUE;
2606
2607 /* If this is a relocatable link (output_bfd test tells us), just
2608 call the generic function. Any adjustment will be done at final
2609 link time. */
2610 if (output_bfd != NULL)
2611 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2612 input_section, output_bfd, error_message);
2613
2614 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2615 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2616 insn &= ~(0x01 << 21);
2617 r_type = reloc_entry->howto->type;
2618 if (r_type == R_PPC64_ADDR14_BRTAKEN
2619 || r_type == R_PPC64_REL14_BRTAKEN)
2620 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2621
2622 if (is_isa_v2)
2623 {
2624 /* Set 'a' bit. This is 0b00010 in BO field for branch
2625 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2626 for branch on CTR insns (BO == 1a00t or 1a01t). */
2627 if ((insn & (0x14 << 21)) == (0x04 << 21))
2628 insn |= 0x02 << 21;
2629 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2630 insn |= 0x08 << 21;
2631 else
2632 goto out;
2633 }
2634 else
2635 {
2636 bfd_vma target = 0;
2637 bfd_vma from;
2638
2639 if (!bfd_is_com_section (symbol->section))
2640 target = symbol->value;
2641 target += symbol->section->output_section->vma;
2642 target += symbol->section->output_offset;
2643 target += reloc_entry->addend;
2644
2645 from = (reloc_entry->address
2646 + input_section->output_offset
2647 + input_section->output_section->vma);
2648
2649 /* Invert 'y' bit if not the default. */
2650 if ((bfd_signed_vma) (target - from) < 0)
2651 insn ^= 0x01 << 21;
2652 }
2653 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2654 out:
2655 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2656 input_section, output_bfd, error_message);
2657 }
2658
2659 static bfd_reloc_status_type
2660 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2661 void *data, asection *input_section,
2662 bfd *output_bfd, char **error_message)
2663 {
2664 /* If this is a relocatable link (output_bfd test tells us), just
2665 call the generic function. Any adjustment will be done at final
2666 link time. */
2667 if (output_bfd != NULL)
2668 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2669 input_section, output_bfd, error_message);
2670
2671 /* Subtract the symbol section base address. */
2672 reloc_entry->addend -= symbol->section->output_section->vma;
2673 return bfd_reloc_continue;
2674 }
2675
2676 static bfd_reloc_status_type
2677 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2678 void *data, asection *input_section,
2679 bfd *output_bfd, char **error_message)
2680 {
2681 /* If this is a relocatable link (output_bfd test tells us), just
2682 call the generic function. Any adjustment will be done at final
2683 link time. */
2684 if (output_bfd != NULL)
2685 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2686 input_section, output_bfd, error_message);
2687
2688 /* Subtract the symbol section base address. */
2689 reloc_entry->addend -= symbol->section->output_section->vma;
2690
2691 /* Adjust the addend for sign extension of the low 16 bits. */
2692 reloc_entry->addend += 0x8000;
2693 return bfd_reloc_continue;
2694 }
2695
2696 static bfd_reloc_status_type
2697 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2698 void *data, asection *input_section,
2699 bfd *output_bfd, char **error_message)
2700 {
2701 bfd_vma TOCstart;
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 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2711 if (TOCstart == 0)
2712 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2713
2714 /* Subtract the TOC base address. */
2715 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2716 return bfd_reloc_continue;
2717 }
2718
2719 static bfd_reloc_status_type
2720 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2721 void *data, asection *input_section,
2722 bfd *output_bfd, char **error_message)
2723 {
2724 bfd_vma TOCstart;
2725
2726 /* If this is a relocatable link (output_bfd test tells us), just
2727 call the generic function. Any adjustment will be done at final
2728 link time. */
2729 if (output_bfd != NULL)
2730 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2731 input_section, output_bfd, error_message);
2732
2733 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2734 if (TOCstart == 0)
2735 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2736
2737 /* Subtract the TOC base address. */
2738 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2739
2740 /* Adjust the addend for sign extension of the low 16 bits. */
2741 reloc_entry->addend += 0x8000;
2742 return bfd_reloc_continue;
2743 }
2744
2745 static bfd_reloc_status_type
2746 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2747 void *data, asection *input_section,
2748 bfd *output_bfd, char **error_message)
2749 {
2750 bfd_vma TOCstart;
2751 bfd_size_type octets;
2752
2753 /* If this is a relocatable link (output_bfd test tells us), just
2754 call the generic function. Any adjustment will be done at final
2755 link time. */
2756 if (output_bfd != NULL)
2757 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2758 input_section, output_bfd, error_message);
2759
2760 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2761 if (TOCstart == 0)
2762 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2763
2764 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2765 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2766 return bfd_reloc_ok;
2767 }
2768
2769 static bfd_reloc_status_type
2770 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2771 void *data, asection *input_section,
2772 bfd *output_bfd, char **error_message)
2773 {
2774 /* If this is a relocatable link (output_bfd test tells us), just
2775 call the generic function. Any adjustment will be done at final
2776 link time. */
2777 if (output_bfd != NULL)
2778 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2779 input_section, output_bfd, error_message);
2780
2781 if (error_message != NULL)
2782 {
2783 static char buf[60];
2784 sprintf (buf, "generic linker can't handle %s",
2785 reloc_entry->howto->name);
2786 *error_message = buf;
2787 }
2788 return bfd_reloc_dangerous;
2789 }
2790
2791 /* Track GOT entries needed for a given symbol. We might need more
2792 than one got entry per symbol. */
2793 struct got_entry
2794 {
2795 struct got_entry *next;
2796
2797 /* The symbol addend that we'll be placing in the GOT. */
2798 bfd_vma addend;
2799
2800 /* Unlike other ELF targets, we use separate GOT entries for the same
2801 symbol referenced from different input files. This is to support
2802 automatic multiple TOC/GOT sections, where the TOC base can vary
2803 from one input file to another. After partitioning into TOC groups
2804 we merge entries within the group.
2805
2806 Point to the BFD owning this GOT entry. */
2807 bfd *owner;
2808
2809 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2810 TLS_TPREL or TLS_DTPREL for tls entries. */
2811 unsigned char tls_type;
2812
2813 /* Non-zero if got.ent points to real entry. */
2814 unsigned char is_indirect;
2815
2816 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2817 union
2818 {
2819 bfd_signed_vma refcount;
2820 bfd_vma offset;
2821 struct got_entry *ent;
2822 } got;
2823 };
2824
2825 /* The same for PLT. */
2826 struct plt_entry
2827 {
2828 struct plt_entry *next;
2829
2830 bfd_vma addend;
2831
2832 union
2833 {
2834 bfd_signed_vma refcount;
2835 bfd_vma offset;
2836 } plt;
2837 };
2838
2839 struct ppc64_elf_obj_tdata
2840 {
2841 struct elf_obj_tdata elf;
2842
2843 /* Shortcuts to dynamic linker sections. */
2844 asection *got;
2845 asection *relgot;
2846
2847 /* Used during garbage collection. We attach global symbols defined
2848 on removed .opd entries to this section so that the sym is removed. */
2849 asection *deleted_section;
2850
2851 /* TLS local dynamic got entry handling. Support for multiple GOT
2852 sections means we potentially need one of these for each input bfd. */
2853 struct got_entry tlsld_got;
2854
2855 union {
2856 /* A copy of relocs before they are modified for --emit-relocs. */
2857 Elf_Internal_Rela *relocs;
2858
2859 /* Section contents. */
2860 bfd_byte *contents;
2861 } opd;
2862
2863 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2864 the reloc to be in the range -32768 to 32767. */
2865 unsigned int has_small_toc_reloc : 1;
2866
2867 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2868 instruction not one we handle. */
2869 unsigned int unexpected_toc_insn : 1;
2870 };
2871
2872 #define ppc64_elf_tdata(bfd) \
2873 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2874
2875 #define ppc64_tlsld_got(bfd) \
2876 (&ppc64_elf_tdata (bfd)->tlsld_got)
2877
2878 #define is_ppc64_elf(bfd) \
2879 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2880 && elf_object_id (bfd) == PPC64_ELF_DATA)
2881
2882 /* Override the generic function because we store some extras. */
2883
2884 static bfd_boolean
2885 ppc64_elf_mkobject (bfd *abfd)
2886 {
2887 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2888 PPC64_ELF_DATA);
2889 }
2890
2891 /* Fix bad default arch selected for a 64 bit input bfd when the
2892 default is 32 bit. Also select arch based on apuinfo. */
2893
2894 static bfd_boolean
2895 ppc64_elf_object_p (bfd *abfd)
2896 {
2897 if (!abfd->arch_info->the_default)
2898 return TRUE;
2899
2900 if (abfd->arch_info->bits_per_word == 32)
2901 {
2902 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2903
2904 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2905 {
2906 /* Relies on arch after 32 bit default being 64 bit default. */
2907 abfd->arch_info = abfd->arch_info->next;
2908 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2909 }
2910 }
2911 return _bfd_elf_ppc_set_arch (abfd);
2912 }
2913
2914 /* Support for core dump NOTE sections. */
2915
2916 static bfd_boolean
2917 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2918 {
2919 size_t offset, size;
2920
2921 if (note->descsz != 504)
2922 return FALSE;
2923
2924 /* pr_cursig */
2925 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2926
2927 /* pr_pid */
2928 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2929
2930 /* pr_reg */
2931 offset = 112;
2932 size = 384;
2933
2934 /* Make a ".reg/999" section. */
2935 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2936 size, note->descpos + offset);
2937 }
2938
2939 static bfd_boolean
2940 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2941 {
2942 if (note->descsz != 136)
2943 return FALSE;
2944
2945 elf_tdata (abfd)->core->pid
2946 = bfd_get_32 (abfd, note->descdata + 24);
2947 elf_tdata (abfd)->core->program
2948 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2949 elf_tdata (abfd)->core->command
2950 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2951
2952 return TRUE;
2953 }
2954
2955 static char *
2956 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2957 ...)
2958 {
2959 switch (note_type)
2960 {
2961 default:
2962 return NULL;
2963
2964 case NT_PRPSINFO:
2965 {
2966 char data[136];
2967 va_list ap;
2968
2969 va_start (ap, note_type);
2970 memset (data, 0, sizeof (data));
2971 strncpy (data + 40, va_arg (ap, const char *), 16);
2972 strncpy (data + 56, va_arg (ap, const char *), 80);
2973 va_end (ap);
2974 return elfcore_write_note (abfd, buf, bufsiz,
2975 "CORE", note_type, data, sizeof (data));
2976 }
2977
2978 case NT_PRSTATUS:
2979 {
2980 char data[504];
2981 va_list ap;
2982 long pid;
2983 int cursig;
2984 const void *greg;
2985
2986 va_start (ap, note_type);
2987 memset (data, 0, 112);
2988 pid = va_arg (ap, long);
2989 bfd_put_32 (abfd, pid, data + 32);
2990 cursig = va_arg (ap, int);
2991 bfd_put_16 (abfd, cursig, data + 12);
2992 greg = va_arg (ap, const void *);
2993 memcpy (data + 112, greg, 384);
2994 memset (data + 496, 0, 8);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999 }
3000 }
3001
3002 /* Add extra PPC sections. */
3003
3004 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3005 {
3006 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3007 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3008 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3009 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3010 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3011 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3012 { NULL, 0, 0, 0, 0 }
3013 };
3014
3015 enum _ppc64_sec_type {
3016 sec_normal = 0,
3017 sec_opd = 1,
3018 sec_toc = 2
3019 };
3020
3021 struct _ppc64_elf_section_data
3022 {
3023 struct bfd_elf_section_data elf;
3024
3025 union
3026 {
3027 /* An array with one entry for each opd function descriptor,
3028 and some spares since opd entries may be either 16 or 24 bytes. */
3029 #define OPD_NDX(OFF) ((OFF) >> 4)
3030 struct _opd_sec_data
3031 {
3032 /* Points to the function code section for local opd entries. */
3033 asection **func_sec;
3034
3035 /* After editing .opd, adjust references to opd local syms. */
3036 long *adjust;
3037 } opd;
3038
3039 /* An array for toc sections, indexed by offset/8. */
3040 struct _toc_sec_data
3041 {
3042 /* Specifies the relocation symbol index used at a given toc offset. */
3043 unsigned *symndx;
3044
3045 /* And the relocation addend. */
3046 bfd_vma *add;
3047 } toc;
3048 } u;
3049
3050 enum _ppc64_sec_type sec_type:2;
3051
3052 /* Flag set when small branches are detected. Used to
3053 select suitable defaults for the stub group size. */
3054 unsigned int has_14bit_branch:1;
3055 };
3056
3057 #define ppc64_elf_section_data(sec) \
3058 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3059
3060 static bfd_boolean
3061 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3062 {
3063 if (!sec->used_by_bfd)
3064 {
3065 struct _ppc64_elf_section_data *sdata;
3066 bfd_size_type amt = sizeof (*sdata);
3067
3068 sdata = bfd_zalloc (abfd, amt);
3069 if (sdata == NULL)
3070 return FALSE;
3071 sec->used_by_bfd = sdata;
3072 }
3073
3074 return _bfd_elf_new_section_hook (abfd, sec);
3075 }
3076
3077 static struct _opd_sec_data *
3078 get_opd_info (asection * sec)
3079 {
3080 if (sec != NULL
3081 && ppc64_elf_section_data (sec) != NULL
3082 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3083 return &ppc64_elf_section_data (sec)->u.opd;
3084 return NULL;
3085 }
3086 \f
3087 /* Parameters for the qsort hook. */
3088 static bfd_boolean synthetic_relocatable;
3089 static asection *synthetic_opd;
3090
3091 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3092
3093 static int
3094 compare_symbols (const void *ap, const void *bp)
3095 {
3096 const asymbol *a = * (const asymbol **) ap;
3097 const asymbol *b = * (const asymbol **) bp;
3098
3099 /* Section symbols first. */
3100 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3101 return -1;
3102 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3103 return 1;
3104
3105 /* then .opd symbols. */
3106 if (synthetic_opd != NULL)
3107 {
3108 if (strcmp (a->section->name, ".opd") == 0
3109 && strcmp (b->section->name, ".opd") != 0)
3110 return -1;
3111 if (strcmp (a->section->name, ".opd") != 0
3112 && strcmp (b->section->name, ".opd") == 0)
3113 return 1;
3114 }
3115
3116 /* then other code symbols. */
3117 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3118 == (SEC_CODE | SEC_ALLOC)
3119 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3120 != (SEC_CODE | SEC_ALLOC))
3121 return -1;
3122
3123 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3124 != (SEC_CODE | SEC_ALLOC)
3125 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3126 == (SEC_CODE | SEC_ALLOC))
3127 return 1;
3128
3129 if (synthetic_relocatable)
3130 {
3131 if (a->section->id < b->section->id)
3132 return -1;
3133
3134 if (a->section->id > b->section->id)
3135 return 1;
3136 }
3137
3138 if (a->value + a->section->vma < b->value + b->section->vma)
3139 return -1;
3140
3141 if (a->value + a->section->vma > b->value + b->section->vma)
3142 return 1;
3143
3144 /* For syms with the same value, prefer strong dynamic global function
3145 syms over other syms. */
3146 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3147 return -1;
3148
3149 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3150 return 1;
3151
3152 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3153 return -1;
3154
3155 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3156 return 1;
3157
3158 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3159 return -1;
3160
3161 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3162 return 1;
3163
3164 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3165 return -1;
3166
3167 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3168 return 1;
3169
3170 return 0;
3171 }
3172
3173 /* Search SYMS for a symbol of the given VALUE. */
3174
3175 static asymbol *
3176 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3177 {
3178 long mid;
3179
3180 if (id == (unsigned) -1)
3181 {
3182 while (lo < hi)
3183 {
3184 mid = (lo + hi) >> 1;
3185 if (syms[mid]->value + syms[mid]->section->vma < value)
3186 lo = mid + 1;
3187 else if (syms[mid]->value + syms[mid]->section->vma > value)
3188 hi = mid;
3189 else
3190 return syms[mid];
3191 }
3192 }
3193 else
3194 {
3195 while (lo < hi)
3196 {
3197 mid = (lo + hi) >> 1;
3198 if (syms[mid]->section->id < id)
3199 lo = mid + 1;
3200 else if (syms[mid]->section->id > id)
3201 hi = mid;
3202 else if (syms[mid]->value < value)
3203 lo = mid + 1;
3204 else if (syms[mid]->value > value)
3205 hi = mid;
3206 else
3207 return syms[mid];
3208 }
3209 }
3210 return NULL;
3211 }
3212
3213 static bfd_boolean
3214 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3215 {
3216 bfd_vma vma = *(bfd_vma *) ptr;
3217 return ((section->flags & SEC_ALLOC) != 0
3218 && section->vma <= vma
3219 && vma < section->vma + section->size);
3220 }
3221
3222 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3223 entry syms. Also generate @plt symbols for the glink branch table.
3224 Returns count of synthetic symbols in RET or -1 on error. */
3225
3226 static long
3227 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3228 long static_count, asymbol **static_syms,
3229 long dyn_count, asymbol **dyn_syms,
3230 asymbol **ret)
3231 {
3232 asymbol *s;
3233 long i;
3234 long count;
3235 char *names;
3236 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3237 asection *opd = NULL;
3238 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3239 asymbol **syms;
3240 int abi = abiversion (abfd);
3241
3242 *ret = NULL;
3243
3244 if (abi < 2)
3245 {
3246 opd = bfd_get_section_by_name (abfd, ".opd");
3247 if (opd == NULL && abi == 1)
3248 return 0;
3249 }
3250
3251 symcount = static_count;
3252 if (!relocatable)
3253 symcount += dyn_count;
3254 if (symcount == 0)
3255 return 0;
3256
3257 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3258 if (syms == NULL)
3259 return -1;
3260
3261 if (!relocatable && static_count != 0 && dyn_count != 0)
3262 {
3263 /* Use both symbol tables. */
3264 memcpy (syms, static_syms, static_count * sizeof (*syms));
3265 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3266 }
3267 else if (!relocatable && static_count == 0)
3268 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3269 else
3270 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3271
3272 synthetic_relocatable = relocatable;
3273 synthetic_opd = opd;
3274 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3275
3276 if (!relocatable && symcount > 1)
3277 {
3278 long j;
3279 /* Trim duplicate syms, since we may have merged the normal and
3280 dynamic symbols. Actually, we only care about syms that have
3281 different values, so trim any with the same value. */
3282 for (i = 1, j = 1; i < symcount; ++i)
3283 if (syms[i - 1]->value + syms[i - 1]->section->vma
3284 != syms[i]->value + syms[i]->section->vma)
3285 syms[j++] = syms[i];
3286 symcount = j;
3287 }
3288
3289 i = 0;
3290 /* Note that here and in compare_symbols we can't compare opd and
3291 sym->section directly. With separate debug info files, the
3292 symbols will be extracted from the debug file while abfd passed
3293 to this function is the real binary. */
3294 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3295 ++i;
3296 codesecsym = i;
3297
3298 for (; i < symcount; ++i)
3299 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3300 != (SEC_CODE | SEC_ALLOC))
3301 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3302 break;
3303 codesecsymend = i;
3304
3305 for (; i < symcount; ++i)
3306 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3307 break;
3308 secsymend = i;
3309
3310 if (opd != NULL)
3311 for (; i < symcount; ++i)
3312 if (strcmp (syms[i]->section->name, ".opd") != 0)
3313 break;
3314 opdsymend = i;
3315
3316 for (; i < symcount; ++i)
3317 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3318 != (SEC_CODE | SEC_ALLOC))
3319 break;
3320 symcount = i;
3321
3322 count = 0;
3323
3324 if (relocatable)
3325 {
3326 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3327 arelent *r;
3328 size_t size;
3329 long relcount;
3330
3331 if (opdsymend == secsymend)
3332 goto done;
3333
3334 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3335 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3336 if (relcount == 0)
3337 goto done;
3338
3339 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3340 {
3341 count = -1;
3342 goto done;
3343 }
3344
3345 size = 0;
3346 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3347 {
3348 asymbol *sym;
3349
3350 while (r < opd->relocation + relcount
3351 && r->address < syms[i]->value + opd->vma)
3352 ++r;
3353
3354 if (r == opd->relocation + relcount)
3355 break;
3356
3357 if (r->address != syms[i]->value + opd->vma)
3358 continue;
3359
3360 if (r->howto->type != R_PPC64_ADDR64)
3361 continue;
3362
3363 sym = *r->sym_ptr_ptr;
3364 if (!sym_exists_at (syms, opdsymend, symcount,
3365 sym->section->id, sym->value + r->addend))
3366 {
3367 ++count;
3368 size += sizeof (asymbol);
3369 size += strlen (syms[i]->name) + 2;
3370 }
3371 }
3372
3373 if (size == 0)
3374 goto done;
3375 s = *ret = bfd_malloc (size);
3376 if (s == NULL)
3377 {
3378 count = -1;
3379 goto done;
3380 }
3381
3382 names = (char *) (s + count);
3383
3384 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3385 {
3386 asymbol *sym;
3387
3388 while (r < opd->relocation + relcount
3389 && r->address < syms[i]->value + opd->vma)
3390 ++r;
3391
3392 if (r == opd->relocation + relcount)
3393 break;
3394
3395 if (r->address != syms[i]->value + opd->vma)
3396 continue;
3397
3398 if (r->howto->type != R_PPC64_ADDR64)
3399 continue;
3400
3401 sym = *r->sym_ptr_ptr;
3402 if (!sym_exists_at (syms, opdsymend, symcount,
3403 sym->section->id, sym->value + r->addend))
3404 {
3405 size_t len;
3406
3407 *s = *syms[i];
3408 s->flags |= BSF_SYNTHETIC;
3409 s->section = sym->section;
3410 s->value = sym->value + r->addend;
3411 s->name = names;
3412 *names++ = '.';
3413 len = strlen (syms[i]->name);
3414 memcpy (names, syms[i]->name, len + 1);
3415 names += len + 1;
3416 /* Have udata.p point back to the original symbol this
3417 synthetic symbol was derived from. */
3418 s->udata.p = syms[i];
3419 s++;
3420 }
3421 }
3422 }
3423 else
3424 {
3425 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3426 bfd_byte *contents = NULL;
3427 size_t size;
3428 long plt_count = 0;
3429 bfd_vma glink_vma = 0, resolv_vma = 0;
3430 asection *dynamic, *glink = NULL, *relplt = NULL;
3431 arelent *p;
3432
3433 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3434 {
3435 free_contents_and_exit_err:
3436 count = -1;
3437 free_contents_and_exit:
3438 if (contents)
3439 free (contents);
3440 goto done;
3441 }
3442
3443 size = 0;
3444 for (i = secsymend; i < opdsymend; ++i)
3445 {
3446 bfd_vma ent;
3447
3448 /* Ignore bogus symbols. */
3449 if (syms[i]->value > opd->size - 8)
3450 continue;
3451
3452 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3453 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3454 {
3455 ++count;
3456 size += sizeof (asymbol);
3457 size += strlen (syms[i]->name) + 2;
3458 }
3459 }
3460
3461 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3462 if (dyn_count != 0
3463 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3464 {
3465 bfd_byte *dynbuf, *extdyn, *extdynend;
3466 size_t extdynsize;
3467 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3468
3469 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3470 goto free_contents_and_exit_err;
3471
3472 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3473 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3474
3475 extdyn = dynbuf;
3476 extdynend = extdyn + dynamic->size;
3477 for (; extdyn < extdynend; extdyn += extdynsize)
3478 {
3479 Elf_Internal_Dyn dyn;
3480 (*swap_dyn_in) (abfd, extdyn, &dyn);
3481
3482 if (dyn.d_tag == DT_NULL)
3483 break;
3484
3485 if (dyn.d_tag == DT_PPC64_GLINK)
3486 {
3487 /* The first glink stub starts at offset 32; see
3488 comment in ppc64_elf_finish_dynamic_sections. */
3489 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3490 /* The .glink section usually does not survive the final
3491 link; search for the section (usually .text) where the
3492 glink stubs now reside. */
3493 glink = bfd_sections_find_if (abfd, section_covers_vma,
3494 &glink_vma);
3495 break;
3496 }
3497 }
3498
3499 free (dynbuf);
3500 }
3501
3502 if (glink != NULL)
3503 {
3504 /* Determine __glink trampoline by reading the relative branch
3505 from the first glink stub. */
3506 bfd_byte buf[4];
3507 unsigned int off = 0;
3508
3509 while (bfd_get_section_contents (abfd, glink, buf,
3510 glink_vma + off - glink->vma, 4))
3511 {
3512 unsigned int insn = bfd_get_32 (abfd, buf);
3513 insn ^= B_DOT;
3514 if ((insn & ~0x3fffffc) == 0)
3515 {
3516 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3517 break;
3518 }
3519 off += 4;
3520 if (off > 4)
3521 break;
3522 }
3523
3524 if (resolv_vma)
3525 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3526
3527 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3528 if (relplt != NULL)
3529 {
3530 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3531 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3532 goto free_contents_and_exit_err;
3533
3534 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3535 size += plt_count * sizeof (asymbol);
3536
3537 p = relplt->relocation;
3538 for (i = 0; i < plt_count; i++, p++)
3539 {
3540 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3541 if (p->addend != 0)
3542 size += sizeof ("+0x") - 1 + 16;
3543 }
3544 }
3545 }
3546
3547 if (size == 0)
3548 goto free_contents_and_exit;
3549 s = *ret = bfd_malloc (size);
3550 if (s == NULL)
3551 goto free_contents_and_exit_err;
3552
3553 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3554
3555 for (i = secsymend; i < opdsymend; ++i)
3556 {
3557 bfd_vma ent;
3558
3559 if (syms[i]->value > opd->size - 8)
3560 continue;
3561
3562 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3563 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3564 {
3565 long lo, hi;
3566 size_t len;
3567 asection *sec = abfd->sections;
3568
3569 *s = *syms[i];
3570 lo = codesecsym;
3571 hi = codesecsymend;
3572 while (lo < hi)
3573 {
3574 long mid = (lo + hi) >> 1;
3575 if (syms[mid]->section->vma < ent)
3576 lo = mid + 1;
3577 else if (syms[mid]->section->vma > ent)
3578 hi = mid;
3579 else
3580 {
3581 sec = syms[mid]->section;
3582 break;
3583 }
3584 }
3585
3586 if (lo >= hi && lo > codesecsym)
3587 sec = syms[lo - 1]->section;
3588
3589 for (; sec != NULL; sec = sec->next)
3590 {
3591 if (sec->vma > ent)
3592 break;
3593 /* SEC_LOAD may not be set if SEC is from a separate debug
3594 info file. */
3595 if ((sec->flags & SEC_ALLOC) == 0)
3596 break;
3597 if ((sec->flags & SEC_CODE) != 0)
3598 s->section = sec;
3599 }
3600 s->flags |= BSF_SYNTHETIC;
3601 s->value = ent - s->section->vma;
3602 s->name = names;
3603 *names++ = '.';
3604 len = strlen (syms[i]->name);
3605 memcpy (names, syms[i]->name, len + 1);
3606 names += len + 1;
3607 /* Have udata.p point back to the original symbol this
3608 synthetic symbol was derived from. */
3609 s->udata.p = syms[i];
3610 s++;
3611 }
3612 }
3613 free (contents);
3614
3615 if (glink != NULL && relplt != NULL)
3616 {
3617 if (resolv_vma)
3618 {
3619 /* Add a symbol for the main glink trampoline. */
3620 memset (s, 0, sizeof *s);
3621 s->the_bfd = abfd;
3622 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3623 s->section = glink;
3624 s->value = resolv_vma - glink->vma;
3625 s->name = names;
3626 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3627 names += sizeof ("__glink_PLTresolve");
3628 s++;
3629 count++;
3630 }
3631
3632 /* FIXME: It would be very much nicer to put sym@plt on the
3633 stub rather than on the glink branch table entry. The
3634 objdump disassembler would then use a sensible symbol
3635 name on plt calls. The difficulty in doing so is
3636 a) finding the stubs, and,
3637 b) matching stubs against plt entries, and,
3638 c) there can be multiple stubs for a given plt entry.
3639
3640 Solving (a) could be done by code scanning, but older
3641 ppc64 binaries used different stubs to current code.
3642 (b) is the tricky one since you need to known the toc
3643 pointer for at least one function that uses a pic stub to
3644 be able to calculate the plt address referenced.
3645 (c) means gdb would need to set multiple breakpoints (or
3646 find the glink branch itself) when setting breakpoints
3647 for pending shared library loads. */
3648 p = relplt->relocation;
3649 for (i = 0; i < plt_count; i++, p++)
3650 {
3651 size_t len;
3652
3653 *s = **p->sym_ptr_ptr;
3654 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3655 we are defining a symbol, ensure one of them is set. */
3656 if ((s->flags & BSF_LOCAL) == 0)
3657 s->flags |= BSF_GLOBAL;
3658 s->flags |= BSF_SYNTHETIC;
3659 s->section = glink;
3660 s->value = glink_vma - glink->vma;
3661 s->name = names;
3662 s->udata.p = NULL;
3663 len = strlen ((*p->sym_ptr_ptr)->name);
3664 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3665 names += len;
3666 if (p->addend != 0)
3667 {
3668 memcpy (names, "+0x", sizeof ("+0x") - 1);
3669 names += sizeof ("+0x") - 1;
3670 bfd_sprintf_vma (abfd, names, p->addend);
3671 names += strlen (names);
3672 }
3673 memcpy (names, "@plt", sizeof ("@plt"));
3674 names += sizeof ("@plt");
3675 s++;
3676 if (abi < 2)
3677 {
3678 glink_vma += 8;
3679 if (i >= 0x8000)
3680 glink_vma += 4;
3681 }
3682 else
3683 glink_vma += 4;
3684 }
3685 count += plt_count;
3686 }
3687 }
3688
3689 done:
3690 free (syms);
3691 return count;
3692 }
3693 \f
3694 /* The following functions are specific to the ELF linker, while
3695 functions above are used generally. Those named ppc64_elf_* are
3696 called by the main ELF linker code. They appear in this file more
3697 or less in the order in which they are called. eg.
3698 ppc64_elf_check_relocs is called early in the link process,
3699 ppc64_elf_finish_dynamic_sections is one of the last functions
3700 called.
3701
3702 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3703 functions have both a function code symbol and a function descriptor
3704 symbol. A call to foo in a relocatable object file looks like:
3705
3706 . .text
3707 . x:
3708 . bl .foo
3709 . nop
3710
3711 The function definition in another object file might be:
3712
3713 . .section .opd
3714 . foo: .quad .foo
3715 . .quad .TOC.@tocbase
3716 . .quad 0
3717 .
3718 . .text
3719 . .foo: blr
3720
3721 When the linker resolves the call during a static link, the branch
3722 unsurprisingly just goes to .foo and the .opd information is unused.
3723 If the function definition is in a shared library, things are a little
3724 different: The call goes via a plt call stub, the opd information gets
3725 copied to the plt, and the linker patches the nop.
3726
3727 . x:
3728 . bl .foo_stub
3729 . ld 2,40(1)
3730 .
3731 .
3732 . .foo_stub:
3733 . std 2,40(1) # in practice, the call stub
3734 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3735 . addi 11,11,Lfoo@toc@l # this is the general idea
3736 . ld 12,0(11)
3737 . ld 2,8(11)
3738 . mtctr 12
3739 . ld 11,16(11)
3740 . bctr
3741 .
3742 . .section .plt
3743 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3744
3745 The "reloc ()" notation is supposed to indicate that the linker emits
3746 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3747 copying.
3748
3749 What are the difficulties here? Well, firstly, the relocations
3750 examined by the linker in check_relocs are against the function code
3751 sym .foo, while the dynamic relocation in the plt is emitted against
3752 the function descriptor symbol, foo. Somewhere along the line, we need
3753 to carefully copy dynamic link information from one symbol to the other.
3754 Secondly, the generic part of the elf linker will make .foo a dynamic
3755 symbol as is normal for most other backends. We need foo dynamic
3756 instead, at least for an application final link. However, when
3757 creating a shared library containing foo, we need to have both symbols
3758 dynamic so that references to .foo are satisfied during the early
3759 stages of linking. Otherwise the linker might decide to pull in a
3760 definition from some other object, eg. a static library.
3761
3762 Update: As of August 2004, we support a new convention. Function
3763 calls may use the function descriptor symbol, ie. "bl foo". This
3764 behaves exactly as "bl .foo". */
3765
3766 /* Of those relocs that might be copied as dynamic relocs, this function
3767 selects those that must be copied when linking a shared library,
3768 even when the symbol is local. */
3769
3770 static int
3771 must_be_dyn_reloc (struct bfd_link_info *info,
3772 enum elf_ppc64_reloc_type r_type)
3773 {
3774 switch (r_type)
3775 {
3776 default:
3777 return 1;
3778
3779 case R_PPC64_REL32:
3780 case R_PPC64_REL64:
3781 case R_PPC64_REL30:
3782 return 0;
3783
3784 case R_PPC64_TPREL16:
3785 case R_PPC64_TPREL16_LO:
3786 case R_PPC64_TPREL16_HI:
3787 case R_PPC64_TPREL16_HA:
3788 case R_PPC64_TPREL16_DS:
3789 case R_PPC64_TPREL16_LO_DS:
3790 case R_PPC64_TPREL16_HIGH:
3791 case R_PPC64_TPREL16_HIGHA:
3792 case R_PPC64_TPREL16_HIGHER:
3793 case R_PPC64_TPREL16_HIGHERA:
3794 case R_PPC64_TPREL16_HIGHEST:
3795 case R_PPC64_TPREL16_HIGHESTA:
3796 case R_PPC64_TPREL64:
3797 return !bfd_link_executable (info);
3798 }
3799 }
3800
3801 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3802 copying dynamic variables from a shared lib into an app's dynbss
3803 section, and instead use a dynamic relocation to point into the
3804 shared lib. With code that gcc generates, it's vital that this be
3805 enabled; In the PowerPC64 ABI, the address of a function is actually
3806 the address of a function descriptor, which resides in the .opd
3807 section. gcc uses the descriptor directly rather than going via the
3808 GOT as some other ABI's do, which means that initialized function
3809 pointers must reference the descriptor. Thus, a function pointer
3810 initialized to the address of a function in a shared library will
3811 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3812 redefines the function descriptor symbol to point to the copy. This
3813 presents a problem as a plt entry for that function is also
3814 initialized from the function descriptor symbol and the copy reloc
3815 may not be initialized first. */
3816 #define ELIMINATE_COPY_RELOCS 1
3817
3818 /* Section name for stubs is the associated section name plus this
3819 string. */
3820 #define STUB_SUFFIX ".stub"
3821
3822 /* Linker stubs.
3823 ppc_stub_long_branch:
3824 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3825 destination, but a 24 bit branch in a stub section will reach.
3826 . b dest
3827
3828 ppc_stub_plt_branch:
3829 Similar to the above, but a 24 bit branch in the stub section won't
3830 reach its destination.
3831 . addis %r11,%r2,xxx@toc@ha
3832 . ld %r12,xxx@toc@l(%r11)
3833 . mtctr %r12
3834 . bctr
3835
3836 ppc_stub_plt_call:
3837 Used to call a function in a shared library. If it so happens that
3838 the plt entry referenced crosses a 64k boundary, then an extra
3839 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3840 . std %r2,40(%r1)
3841 . addis %r11,%r2,xxx@toc@ha
3842 . ld %r12,xxx+0@toc@l(%r11)
3843 . mtctr %r12
3844 . ld %r2,xxx+8@toc@l(%r11)
3845 . ld %r11,xxx+16@toc@l(%r11)
3846 . bctr
3847
3848 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3849 code to adjust the value and save r2 to support multiple toc sections.
3850 A ppc_stub_long_branch with an r2 offset looks like:
3851 . std %r2,40(%r1)
3852 . addis %r2,%r2,off@ha
3853 . addi %r2,%r2,off@l
3854 . b dest
3855
3856 A ppc_stub_plt_branch with an r2 offset looks like:
3857 . std %r2,40(%r1)
3858 . addis %r11,%r2,xxx@toc@ha
3859 . ld %r12,xxx@toc@l(%r11)
3860 . addis %r2,%r2,off@ha
3861 . addi %r2,%r2,off@l
3862 . mtctr %r12
3863 . bctr
3864
3865 In cases where the "addis" instruction would add zero, the "addis" is
3866 omitted and following instructions modified slightly in some cases.
3867 */
3868
3869 enum ppc_stub_type {
3870 ppc_stub_none,
3871 ppc_stub_long_branch,
3872 ppc_stub_long_branch_r2off,
3873 ppc_stub_plt_branch,
3874 ppc_stub_plt_branch_r2off,
3875 ppc_stub_plt_call,
3876 ppc_stub_plt_call_r2save,
3877 ppc_stub_global_entry,
3878 ppc_stub_save_res
3879 };
3880
3881 /* Information on stub grouping. */
3882 struct map_stub
3883 {
3884 /* The stub section. */
3885 asection *stub_sec;
3886 /* This is the section to which stubs in the group will be attached. */
3887 asection *link_sec;
3888 /* Next group. */
3889 struct map_stub *next;
3890 /* Whether to emit a copy of register save/restore functions in this
3891 group. */
3892 int needs_save_res;
3893 };
3894
3895 struct ppc_stub_hash_entry {
3896
3897 /* Base hash table entry structure. */
3898 struct bfd_hash_entry root;
3899
3900 enum ppc_stub_type stub_type;
3901
3902 /* Group information. */
3903 struct map_stub *group;
3904
3905 /* Offset within stub_sec of the beginning of this stub. */
3906 bfd_vma stub_offset;
3907
3908 /* Given the symbol's value and its section we can determine its final
3909 value when building the stubs (so the stub knows where to jump. */
3910 bfd_vma target_value;
3911 asection *target_section;
3912
3913 /* The symbol table entry, if any, that this was derived from. */
3914 struct ppc_link_hash_entry *h;
3915 struct plt_entry *plt_ent;
3916
3917 /* Symbol st_other. */
3918 unsigned char other;
3919 };
3920
3921 struct ppc_branch_hash_entry {
3922
3923 /* Base hash table entry structure. */
3924 struct bfd_hash_entry root;
3925
3926 /* Offset within branch lookup table. */
3927 unsigned int offset;
3928
3929 /* Generation marker. */
3930 unsigned int iter;
3931 };
3932
3933 /* Used to track dynamic relocations for local symbols. */
3934 struct ppc_dyn_relocs
3935 {
3936 struct ppc_dyn_relocs *next;
3937
3938 /* The input section of the reloc. */
3939 asection *sec;
3940
3941 /* Total number of relocs copied for the input section. */
3942 unsigned int count : 31;
3943
3944 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3945 unsigned int ifunc : 1;
3946 };
3947
3948 struct ppc_link_hash_entry
3949 {
3950 struct elf_link_hash_entry elf;
3951
3952 union {
3953 /* A pointer to the most recently used stub hash entry against this
3954 symbol. */
3955 struct ppc_stub_hash_entry *stub_cache;
3956
3957 /* A pointer to the next symbol starting with a '.' */
3958 struct ppc_link_hash_entry *next_dot_sym;
3959 } u;
3960
3961 /* Track dynamic relocs copied for this symbol. */
3962 struct elf_dyn_relocs *dyn_relocs;
3963
3964 /* Chain of aliases referring to a weakdef. */
3965 struct ppc_link_hash_entry *weakref;
3966
3967 /* Link between function code and descriptor symbols. */
3968 struct ppc_link_hash_entry *oh;
3969
3970 /* Flag function code and descriptor symbols. */
3971 unsigned int is_func:1;
3972 unsigned int is_func_descriptor:1;
3973 unsigned int fake:1;
3974
3975 /* Whether global opd/toc sym has been adjusted or not.
3976 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3977 should be set for all globals defined in any opd/toc section. */
3978 unsigned int adjust_done:1;
3979
3980 /* Set if we twiddled this symbol to weak at some stage. */
3981 unsigned int was_undefined:1;
3982
3983 /* Set if this is an out-of-line register save/restore function,
3984 with non-standard calling convention. */
3985 unsigned int save_res:1;
3986
3987 /* Contexts in which symbol is used in the GOT (or TOC).
3988 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3989 corresponding relocs are encountered during check_relocs.
3990 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3991 indicate the corresponding GOT entry type is not needed.
3992 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3993 a TPREL one. We use a separate flag rather than setting TPREL
3994 just for convenience in distinguishing the two cases. */
3995 #define TLS_GD 1 /* GD reloc. */
3996 #define TLS_LD 2 /* LD reloc. */
3997 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3998 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3999 #define TLS_TLS 16 /* Any TLS reloc. */
4000 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4001 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4002 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4003 unsigned char tls_mask;
4004 };
4005
4006 /* ppc64 ELF linker hash table. */
4007
4008 struct ppc_link_hash_table
4009 {
4010 struct elf_link_hash_table elf;
4011
4012 /* The stub hash table. */
4013 struct bfd_hash_table stub_hash_table;
4014
4015 /* Another hash table for plt_branch stubs. */
4016 struct bfd_hash_table branch_hash_table;
4017
4018 /* Hash table for function prologue tocsave. */
4019 htab_t tocsave_htab;
4020
4021 /* Various options and other info passed from the linker. */
4022 struct ppc64_elf_params *params;
4023
4024 /* The size of sec_info below. */
4025 unsigned int sec_info_arr_size;
4026
4027 /* Per-section array of extra section info. Done this way rather
4028 than as part of ppc64_elf_section_data so we have the info for
4029 non-ppc64 sections. */
4030 struct
4031 {
4032 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4033 bfd_vma toc_off;
4034
4035 union
4036 {
4037 /* The section group that this section belongs to. */
4038 struct map_stub *group;
4039 /* A temp section list pointer. */
4040 asection *list;
4041 } u;
4042 } *sec_info;
4043
4044 /* Linked list of groups. */
4045 struct map_stub *group;
4046
4047 /* Temp used when calculating TOC pointers. */
4048 bfd_vma toc_curr;
4049 bfd *toc_bfd;
4050 asection *toc_first_sec;
4051
4052 /* Used when adding symbols. */
4053 struct ppc_link_hash_entry *dot_syms;
4054
4055 /* Shortcuts to get to dynamic linker sections. */
4056 asection *dynbss;
4057 asection *relbss;
4058 asection *glink;
4059 asection *sfpr;
4060 asection *brlt;
4061 asection *relbrlt;
4062 asection *glink_eh_frame;
4063
4064 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4065 struct ppc_link_hash_entry *tls_get_addr;
4066 struct ppc_link_hash_entry *tls_get_addr_fd;
4067
4068 /* The size of reliplt used by got entry relocs. */
4069 bfd_size_type got_reli_size;
4070
4071 /* Statistics. */
4072 unsigned long stub_count[ppc_stub_global_entry];
4073
4074 /* Number of stubs against global syms. */
4075 unsigned long stub_globals;
4076
4077 /* Set if we're linking code with function descriptors. */
4078 unsigned int opd_abi:1;
4079
4080 /* Support for multiple toc sections. */
4081 unsigned int do_multi_toc:1;
4082 unsigned int multi_toc_needed:1;
4083 unsigned int second_toc_pass:1;
4084 unsigned int do_toc_opt:1;
4085
4086 /* Set on error. */
4087 unsigned int stub_error:1;
4088
4089 /* Temp used by ppc64_elf_before_check_relocs. */
4090 unsigned int twiddled_syms:1;
4091
4092 /* Incremented every time we size stubs. */
4093 unsigned int stub_iteration;
4094
4095 /* Small local sym cache. */
4096 struct sym_cache sym_cache;
4097 };
4098
4099 /* Rename some of the generic section flags to better document how they
4100 are used here. */
4101
4102 /* Nonzero if this section has TLS related relocations. */
4103 #define has_tls_reloc sec_flg0
4104
4105 /* Nonzero if this section has a call to __tls_get_addr. */
4106 #define has_tls_get_addr_call sec_flg1
4107
4108 /* Nonzero if this section has any toc or got relocs. */
4109 #define has_toc_reloc sec_flg2
4110
4111 /* Nonzero if this section has a call to another section that uses
4112 the toc or got. */
4113 #define makes_toc_func_call sec_flg3
4114
4115 /* Recursion protection when determining above flag. */
4116 #define call_check_in_progress sec_flg4
4117 #define call_check_done sec_flg5
4118
4119 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4120
4121 #define ppc_hash_table(p) \
4122 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4123 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4124
4125 #define ppc_stub_hash_lookup(table, string, create, copy) \
4126 ((struct ppc_stub_hash_entry *) \
4127 bfd_hash_lookup ((table), (string), (create), (copy)))
4128
4129 #define ppc_branch_hash_lookup(table, string, create, copy) \
4130 ((struct ppc_branch_hash_entry *) \
4131 bfd_hash_lookup ((table), (string), (create), (copy)))
4132
4133 /* Create an entry in the stub hash table. */
4134
4135 static struct bfd_hash_entry *
4136 stub_hash_newfunc (struct bfd_hash_entry *entry,
4137 struct bfd_hash_table *table,
4138 const char *string)
4139 {
4140 /* Allocate the structure if it has not already been allocated by a
4141 subclass. */
4142 if (entry == NULL)
4143 {
4144 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4145 if (entry == NULL)
4146 return entry;
4147 }
4148
4149 /* Call the allocation method of the superclass. */
4150 entry = bfd_hash_newfunc (entry, table, string);
4151 if (entry != NULL)
4152 {
4153 struct ppc_stub_hash_entry *eh;
4154
4155 /* Initialize the local fields. */
4156 eh = (struct ppc_stub_hash_entry *) entry;
4157 eh->stub_type = ppc_stub_none;
4158 eh->group = NULL;
4159 eh->stub_offset = 0;
4160 eh->target_value = 0;
4161 eh->target_section = NULL;
4162 eh->h = NULL;
4163 eh->plt_ent = NULL;
4164 eh->other = 0;
4165 }
4166
4167 return entry;
4168 }
4169
4170 /* Create an entry in the branch hash table. */
4171
4172 static struct bfd_hash_entry *
4173 branch_hash_newfunc (struct bfd_hash_entry *entry,
4174 struct bfd_hash_table *table,
4175 const char *string)
4176 {
4177 /* Allocate the structure if it has not already been allocated by a
4178 subclass. */
4179 if (entry == NULL)
4180 {
4181 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4182 if (entry == NULL)
4183 return entry;
4184 }
4185
4186 /* Call the allocation method of the superclass. */
4187 entry = bfd_hash_newfunc (entry, table, string);
4188 if (entry != NULL)
4189 {
4190 struct ppc_branch_hash_entry *eh;
4191
4192 /* Initialize the local fields. */
4193 eh = (struct ppc_branch_hash_entry *) entry;
4194 eh->offset = 0;
4195 eh->iter = 0;
4196 }
4197
4198 return entry;
4199 }
4200
4201 /* Create an entry in a ppc64 ELF linker hash table. */
4202
4203 static struct bfd_hash_entry *
4204 link_hash_newfunc (struct bfd_hash_entry *entry,
4205 struct bfd_hash_table *table,
4206 const char *string)
4207 {
4208 /* Allocate the structure if it has not already been allocated by a
4209 subclass. */
4210 if (entry == NULL)
4211 {
4212 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4213 if (entry == NULL)
4214 return entry;
4215 }
4216
4217 /* Call the allocation method of the superclass. */
4218 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4219 if (entry != NULL)
4220 {
4221 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4222
4223 memset (&eh->u.stub_cache, 0,
4224 (sizeof (struct ppc_link_hash_entry)
4225 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4226
4227 /* When making function calls, old ABI code references function entry
4228 points (dot symbols), while new ABI code references the function
4229 descriptor symbol. We need to make any combination of reference and
4230 definition work together, without breaking archive linking.
4231
4232 For a defined function "foo" and an undefined call to "bar":
4233 An old object defines "foo" and ".foo", references ".bar" (possibly
4234 "bar" too).
4235 A new object defines "foo" and references "bar".
4236
4237 A new object thus has no problem with its undefined symbols being
4238 satisfied by definitions in an old object. On the other hand, the
4239 old object won't have ".bar" satisfied by a new object.
4240
4241 Keep a list of newly added dot-symbols. */
4242
4243 if (string[0] == '.')
4244 {
4245 struct ppc_link_hash_table *htab;
4246
4247 htab = (struct ppc_link_hash_table *) table;
4248 eh->u.next_dot_sym = htab->dot_syms;
4249 htab->dot_syms = eh;
4250 }
4251 }
4252
4253 return entry;
4254 }
4255
4256 struct tocsave_entry {
4257 asection *sec;
4258 bfd_vma offset;
4259 };
4260
4261 static hashval_t
4262 tocsave_htab_hash (const void *p)
4263 {
4264 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4265 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4266 }
4267
4268 static int
4269 tocsave_htab_eq (const void *p1, const void *p2)
4270 {
4271 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4272 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4273 return e1->sec == e2->sec && e1->offset == e2->offset;
4274 }
4275
4276 /* Destroy a ppc64 ELF linker hash table. */
4277
4278 static void
4279 ppc64_elf_link_hash_table_free (bfd *obfd)
4280 {
4281 struct ppc_link_hash_table *htab;
4282
4283 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4284 if (htab->tocsave_htab)
4285 htab_delete (htab->tocsave_htab);
4286 bfd_hash_table_free (&htab->branch_hash_table);
4287 bfd_hash_table_free (&htab->stub_hash_table);
4288 _bfd_elf_link_hash_table_free (obfd);
4289 }
4290
4291 /* Create a ppc64 ELF linker hash table. */
4292
4293 static struct bfd_link_hash_table *
4294 ppc64_elf_link_hash_table_create (bfd *abfd)
4295 {
4296 struct ppc_link_hash_table *htab;
4297 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4298
4299 htab = bfd_zmalloc (amt);
4300 if (htab == NULL)
4301 return NULL;
4302
4303 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4304 sizeof (struct ppc_link_hash_entry),
4305 PPC64_ELF_DATA))
4306 {
4307 free (htab);
4308 return NULL;
4309 }
4310
4311 /* Init the stub hash table too. */
4312 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4313 sizeof (struct ppc_stub_hash_entry)))
4314 {
4315 _bfd_elf_link_hash_table_free (abfd);
4316 return NULL;
4317 }
4318
4319 /* And the branch hash table. */
4320 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4321 sizeof (struct ppc_branch_hash_entry)))
4322 {
4323 bfd_hash_table_free (&htab->stub_hash_table);
4324 _bfd_elf_link_hash_table_free (abfd);
4325 return NULL;
4326 }
4327
4328 htab->tocsave_htab = htab_try_create (1024,
4329 tocsave_htab_hash,
4330 tocsave_htab_eq,
4331 NULL);
4332 if (htab->tocsave_htab == NULL)
4333 {
4334 ppc64_elf_link_hash_table_free (abfd);
4335 return NULL;
4336 }
4337 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4338
4339 /* Initializing two fields of the union is just cosmetic. We really
4340 only care about glist, but when compiled on a 32-bit host the
4341 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4342 debugger inspection of these fields look nicer. */
4343 htab->elf.init_got_refcount.refcount = 0;
4344 htab->elf.init_got_refcount.glist = NULL;
4345 htab->elf.init_plt_refcount.refcount = 0;
4346 htab->elf.init_plt_refcount.glist = NULL;
4347 htab->elf.init_got_offset.offset = 0;
4348 htab->elf.init_got_offset.glist = NULL;
4349 htab->elf.init_plt_offset.offset = 0;
4350 htab->elf.init_plt_offset.glist = NULL;
4351
4352 return &htab->elf.root;
4353 }
4354
4355 /* Create sections for linker generated code. */
4356
4357 static bfd_boolean
4358 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4359 {
4360 struct ppc_link_hash_table *htab;
4361 flagword flags;
4362
4363 htab = ppc_hash_table (info);
4364
4365 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4366 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4367 if (htab->params->save_restore_funcs)
4368 {
4369 /* Create .sfpr for code to save and restore fp regs. */
4370 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4371 flags);
4372 if (htab->sfpr == NULL
4373 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4374 return FALSE;
4375 }
4376
4377 if (bfd_link_relocatable (info))
4378 return TRUE;
4379
4380 /* Create .glink for lazy dynamic linking support. */
4381 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4382 flags);
4383 if (htab->glink == NULL
4384 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4385 return FALSE;
4386
4387 if (!info->no_ld_generated_unwind_info)
4388 {
4389 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4390 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4391 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4392 ".eh_frame",
4393 flags);
4394 if (htab->glink_eh_frame == NULL
4395 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4396 return FALSE;
4397 }
4398
4399 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4400 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4401 if (htab->elf.iplt == NULL
4402 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4403 return FALSE;
4404
4405 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4406 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4407 htab->elf.irelplt
4408 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4409 if (htab->elf.irelplt == NULL
4410 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4411 return FALSE;
4412
4413 /* Create branch lookup table for plt_branch stubs. */
4414 flags = (SEC_ALLOC | SEC_LOAD
4415 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4416 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4417 flags);
4418 if (htab->brlt == NULL
4419 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4420 return FALSE;
4421
4422 if (!bfd_link_pic (info))
4423 return TRUE;
4424
4425 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4426 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4427 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4428 ".rela.branch_lt",
4429 flags);
4430 if (htab->relbrlt == NULL
4431 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4432 return FALSE;
4433
4434 return TRUE;
4435 }
4436
4437 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4438
4439 bfd_boolean
4440 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4441 struct ppc64_elf_params *params)
4442 {
4443 struct ppc_link_hash_table *htab;
4444
4445 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4446
4447 /* Always hook our dynamic sections into the first bfd, which is the
4448 linker created stub bfd. This ensures that the GOT header is at
4449 the start of the output TOC section. */
4450 htab = ppc_hash_table (info);
4451 htab->elf.dynobj = params->stub_bfd;
4452 htab->params = params;
4453
4454 return create_linkage_sections (htab->elf.dynobj, info);
4455 }
4456
4457 /* Build a name for an entry in the stub hash table. */
4458
4459 static char *
4460 ppc_stub_name (const asection *input_section,
4461 const asection *sym_sec,
4462 const struct ppc_link_hash_entry *h,
4463 const Elf_Internal_Rela *rel)
4464 {
4465 char *stub_name;
4466 ssize_t len;
4467
4468 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4469 offsets from a sym as a branch target? In fact, we could
4470 probably assume the addend is always zero. */
4471 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4472
4473 if (h)
4474 {
4475 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4476 stub_name = bfd_malloc (len);
4477 if (stub_name == NULL)
4478 return stub_name;
4479
4480 len = sprintf (stub_name, "%08x.%s+%x",
4481 input_section->id & 0xffffffff,
4482 h->elf.root.root.string,
4483 (int) rel->r_addend & 0xffffffff);
4484 }
4485 else
4486 {
4487 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4488 stub_name = bfd_malloc (len);
4489 if (stub_name == NULL)
4490 return stub_name;
4491
4492 len = sprintf (stub_name, "%08x.%x:%x+%x",
4493 input_section->id & 0xffffffff,
4494 sym_sec->id & 0xffffffff,
4495 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4496 (int) rel->r_addend & 0xffffffff);
4497 }
4498 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4499 stub_name[len - 2] = 0;
4500 return stub_name;
4501 }
4502
4503 /* Look up an entry in the stub hash. Stub entries are cached because
4504 creating the stub name takes a bit of time. */
4505
4506 static struct ppc_stub_hash_entry *
4507 ppc_get_stub_entry (const asection *input_section,
4508 const asection *sym_sec,
4509 struct ppc_link_hash_entry *h,
4510 const Elf_Internal_Rela *rel,
4511 struct ppc_link_hash_table *htab)
4512 {
4513 struct ppc_stub_hash_entry *stub_entry;
4514 struct map_stub *group;
4515
4516 /* If this input section is part of a group of sections sharing one
4517 stub section, then use the id of the first section in the group.
4518 Stub names need to include a section id, as there may well be
4519 more than one stub used to reach say, printf, and we need to
4520 distinguish between them. */
4521 group = htab->sec_info[input_section->id].u.group;
4522 if (group == NULL)
4523 return NULL;
4524
4525 if (h != NULL && h->u.stub_cache != NULL
4526 && h->u.stub_cache->h == h
4527 && h->u.stub_cache->group == group)
4528 {
4529 stub_entry = h->u.stub_cache;
4530 }
4531 else
4532 {
4533 char *stub_name;
4534
4535 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4536 if (stub_name == NULL)
4537 return NULL;
4538
4539 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4540 stub_name, FALSE, FALSE);
4541 if (h != NULL)
4542 h->u.stub_cache = stub_entry;
4543
4544 free (stub_name);
4545 }
4546
4547 return stub_entry;
4548 }
4549
4550 /* Add a new stub entry to the stub hash. Not all fields of the new
4551 stub entry are initialised. */
4552
4553 static struct ppc_stub_hash_entry *
4554 ppc_add_stub (const char *stub_name,
4555 asection *section,
4556 struct bfd_link_info *info)
4557 {
4558 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4559 struct map_stub *group;
4560 asection *link_sec;
4561 asection *stub_sec;
4562 struct ppc_stub_hash_entry *stub_entry;
4563
4564 group = htab->sec_info[section->id].u.group;
4565 link_sec = group->link_sec;
4566 stub_sec = group->stub_sec;
4567 if (stub_sec == NULL)
4568 {
4569 size_t namelen;
4570 bfd_size_type len;
4571 char *s_name;
4572
4573 namelen = strlen (link_sec->name);
4574 len = namelen + sizeof (STUB_SUFFIX);
4575 s_name = bfd_alloc (htab->params->stub_bfd, len);
4576 if (s_name == NULL)
4577 return NULL;
4578
4579 memcpy (s_name, link_sec->name, namelen);
4580 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4581 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4582 if (stub_sec == NULL)
4583 return NULL;
4584 group->stub_sec = stub_sec;
4585 }
4586
4587 /* Enter this entry into the linker stub hash table. */
4588 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4589 TRUE, FALSE);
4590 if (stub_entry == NULL)
4591 {
4592 /* xgettext:c-format */
4593 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4594 section->owner, stub_name);
4595 return NULL;
4596 }
4597
4598 stub_entry->group = group;
4599 stub_entry->stub_offset = 0;
4600 return stub_entry;
4601 }
4602
4603 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4604 not already done. */
4605
4606 static bfd_boolean
4607 create_got_section (bfd *abfd, struct bfd_link_info *info)
4608 {
4609 asection *got, *relgot;
4610 flagword flags;
4611 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4612
4613 if (!is_ppc64_elf (abfd))
4614 return FALSE;
4615 if (htab == NULL)
4616 return FALSE;
4617
4618 if (!htab->elf.sgot
4619 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4620 return FALSE;
4621
4622 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4623 | SEC_LINKER_CREATED);
4624
4625 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4626 if (!got
4627 || !bfd_set_section_alignment (abfd, got, 3))
4628 return FALSE;
4629
4630 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4631 flags | SEC_READONLY);
4632 if (!relgot
4633 || ! bfd_set_section_alignment (abfd, relgot, 3))
4634 return FALSE;
4635
4636 ppc64_elf_tdata (abfd)->got = got;
4637 ppc64_elf_tdata (abfd)->relgot = relgot;
4638 return TRUE;
4639 }
4640
4641 /* Create the dynamic sections, and set up shortcuts. */
4642
4643 static bfd_boolean
4644 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4645 {
4646 struct ppc_link_hash_table *htab;
4647
4648 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4649 return FALSE;
4650
4651 htab = ppc_hash_table (info);
4652 if (htab == NULL)
4653 return FALSE;
4654
4655 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4656 if (!bfd_link_pic (info))
4657 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4658
4659 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4660 || (!bfd_link_pic (info) && !htab->relbss))
4661 abort ();
4662
4663 return TRUE;
4664 }
4665
4666 /* Follow indirect and warning symbol links. */
4667
4668 static inline struct bfd_link_hash_entry *
4669 follow_link (struct bfd_link_hash_entry *h)
4670 {
4671 while (h->type == bfd_link_hash_indirect
4672 || h->type == bfd_link_hash_warning)
4673 h = h->u.i.link;
4674 return h;
4675 }
4676
4677 static inline struct elf_link_hash_entry *
4678 elf_follow_link (struct elf_link_hash_entry *h)
4679 {
4680 return (struct elf_link_hash_entry *) follow_link (&h->root);
4681 }
4682
4683 static inline struct ppc_link_hash_entry *
4684 ppc_follow_link (struct ppc_link_hash_entry *h)
4685 {
4686 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4687 }
4688
4689 /* Merge PLT info on FROM with that on TO. */
4690
4691 static void
4692 move_plt_plist (struct ppc_link_hash_entry *from,
4693 struct ppc_link_hash_entry *to)
4694 {
4695 if (from->elf.plt.plist != NULL)
4696 {
4697 if (to->elf.plt.plist != NULL)
4698 {
4699 struct plt_entry **entp;
4700 struct plt_entry *ent;
4701
4702 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4703 {
4704 struct plt_entry *dent;
4705
4706 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4707 if (dent->addend == ent->addend)
4708 {
4709 dent->plt.refcount += ent->plt.refcount;
4710 *entp = ent->next;
4711 break;
4712 }
4713 if (dent == NULL)
4714 entp = &ent->next;
4715 }
4716 *entp = to->elf.plt.plist;
4717 }
4718
4719 to->elf.plt.plist = from->elf.plt.plist;
4720 from->elf.plt.plist = NULL;
4721 }
4722 }
4723
4724 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4725
4726 static void
4727 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4728 struct elf_link_hash_entry *dir,
4729 struct elf_link_hash_entry *ind)
4730 {
4731 struct ppc_link_hash_entry *edir, *eind;
4732
4733 edir = (struct ppc_link_hash_entry *) dir;
4734 eind = (struct ppc_link_hash_entry *) ind;
4735
4736 edir->is_func |= eind->is_func;
4737 edir->is_func_descriptor |= eind->is_func_descriptor;
4738 edir->tls_mask |= eind->tls_mask;
4739 if (eind->oh != NULL)
4740 edir->oh = ppc_follow_link (eind->oh);
4741
4742 /* If called to transfer flags for a weakdef during processing
4743 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4744 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4745 if (!(ELIMINATE_COPY_RELOCS
4746 && eind->elf.root.type != bfd_link_hash_indirect
4747 && edir->elf.dynamic_adjusted))
4748 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4749
4750 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4751 edir->elf.ref_regular |= eind->elf.ref_regular;
4752 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4753 edir->elf.needs_plt |= eind->elf.needs_plt;
4754 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4755
4756 /* If we were called to copy over info for a weak sym, don't copy
4757 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4758 in order to simplify readonly_dynrelocs and save a field in the
4759 symbol hash entry, but that means dyn_relocs can't be used in any
4760 tests about a specific symbol, or affect other symbol flags which
4761 are then tested.
4762 Chain weakdefs so we can get from the weakdef back to an alias.
4763 The list is circular so that we don't need to use u.weakdef as
4764 well as this list to look at all aliases. */
4765 if (eind->elf.root.type != bfd_link_hash_indirect)
4766 {
4767 struct ppc_link_hash_entry *cur, *add, *next;
4768
4769 add = eind;
4770 do
4771 {
4772 cur = edir->weakref;
4773 if (cur != NULL)
4774 {
4775 do
4776 {
4777 /* We can be called twice for the same symbols.
4778 Don't make multiple loops. */
4779 if (cur == add)
4780 return;
4781 cur = cur->weakref;
4782 } while (cur != edir);
4783 }
4784 next = add->weakref;
4785 if (cur != add)
4786 {
4787 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4788 edir->weakref = add;
4789 }
4790 add = next;
4791 } while (add != NULL && add != eind);
4792 return;
4793 }
4794
4795 /* Copy over any dynamic relocs we may have on the indirect sym. */
4796 if (eind->dyn_relocs != NULL)
4797 {
4798 if (edir->dyn_relocs != NULL)
4799 {
4800 struct elf_dyn_relocs **pp;
4801 struct elf_dyn_relocs *p;
4802
4803 /* Add reloc counts against the indirect sym to the direct sym
4804 list. Merge any entries against the same section. */
4805 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4806 {
4807 struct elf_dyn_relocs *q;
4808
4809 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4810 if (q->sec == p->sec)
4811 {
4812 q->pc_count += p->pc_count;
4813 q->count += p->count;
4814 *pp = p->next;
4815 break;
4816 }
4817 if (q == NULL)
4818 pp = &p->next;
4819 }
4820 *pp = edir->dyn_relocs;
4821 }
4822
4823 edir->dyn_relocs = eind->dyn_relocs;
4824 eind->dyn_relocs = NULL;
4825 }
4826
4827 /* Copy over got entries that we may have already seen to the
4828 symbol which just became indirect. */
4829 if (eind->elf.got.glist != NULL)
4830 {
4831 if (edir->elf.got.glist != NULL)
4832 {
4833 struct got_entry **entp;
4834 struct got_entry *ent;
4835
4836 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4837 {
4838 struct got_entry *dent;
4839
4840 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4841 if (dent->addend == ent->addend
4842 && dent->owner == ent->owner
4843 && dent->tls_type == ent->tls_type)
4844 {
4845 dent->got.refcount += ent->got.refcount;
4846 *entp = ent->next;
4847 break;
4848 }
4849 if (dent == NULL)
4850 entp = &ent->next;
4851 }
4852 *entp = edir->elf.got.glist;
4853 }
4854
4855 edir->elf.got.glist = eind->elf.got.glist;
4856 eind->elf.got.glist = NULL;
4857 }
4858
4859 /* And plt entries. */
4860 move_plt_plist (eind, edir);
4861
4862 if (eind->elf.dynindx != -1)
4863 {
4864 if (edir->elf.dynindx != -1)
4865 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4866 edir->elf.dynstr_index);
4867 edir->elf.dynindx = eind->elf.dynindx;
4868 edir->elf.dynstr_index = eind->elf.dynstr_index;
4869 eind->elf.dynindx = -1;
4870 eind->elf.dynstr_index = 0;
4871 }
4872 }
4873
4874 /* Find the function descriptor hash entry from the given function code
4875 hash entry FH. Link the entries via their OH fields. */
4876
4877 static struct ppc_link_hash_entry *
4878 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4879 {
4880 struct ppc_link_hash_entry *fdh = fh->oh;
4881
4882 if (fdh == NULL)
4883 {
4884 const char *fd_name = fh->elf.root.root.string + 1;
4885
4886 fdh = (struct ppc_link_hash_entry *)
4887 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4888 if (fdh == NULL)
4889 return fdh;
4890
4891 fdh->is_func_descriptor = 1;
4892 fdh->oh = fh;
4893 fh->is_func = 1;
4894 fh->oh = fdh;
4895 }
4896
4897 return ppc_follow_link (fdh);
4898 }
4899
4900 /* Make a fake function descriptor sym for the code sym FH. */
4901
4902 static struct ppc_link_hash_entry *
4903 make_fdh (struct bfd_link_info *info,
4904 struct ppc_link_hash_entry *fh)
4905 {
4906 bfd *abfd;
4907 asymbol *newsym;
4908 struct bfd_link_hash_entry *bh;
4909 struct ppc_link_hash_entry *fdh;
4910
4911 abfd = fh->elf.root.u.undef.abfd;
4912 newsym = bfd_make_empty_symbol (abfd);
4913 newsym->name = fh->elf.root.root.string + 1;
4914 newsym->section = bfd_und_section_ptr;
4915 newsym->value = 0;
4916 newsym->flags = BSF_WEAK;
4917
4918 bh = NULL;
4919 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4920 newsym->flags, newsym->section,
4921 newsym->value, NULL, FALSE, FALSE,
4922 &bh))
4923 return NULL;
4924
4925 fdh = (struct ppc_link_hash_entry *) bh;
4926 fdh->elf.non_elf = 0;
4927 fdh->fake = 1;
4928 fdh->is_func_descriptor = 1;
4929 fdh->oh = fh;
4930 fh->is_func = 1;
4931 fh->oh = fdh;
4932 return fdh;
4933 }
4934
4935 /* Fix function descriptor symbols defined in .opd sections to be
4936 function type. */
4937
4938 static bfd_boolean
4939 ppc64_elf_add_symbol_hook (bfd *ibfd,
4940 struct bfd_link_info *info,
4941 Elf_Internal_Sym *isym,
4942 const char **name,
4943 flagword *flags ATTRIBUTE_UNUSED,
4944 asection **sec,
4945 bfd_vma *value)
4946 {
4947 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4948 && (ibfd->flags & DYNAMIC) == 0
4949 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4950 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4951
4952 if (*sec != NULL
4953 && strcmp ((*sec)->name, ".opd") == 0)
4954 {
4955 asection *code_sec;
4956
4957 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4958 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4959 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4960
4961 /* If the symbol is a function defined in .opd, and the function
4962 code is in a discarded group, let it appear to be undefined. */
4963 if (!bfd_link_relocatable (info)
4964 && (*sec)->reloc_count != 0
4965 && opd_entry_value (*sec, *value, &code_sec, NULL,
4966 FALSE) != (bfd_vma) -1
4967 && discarded_section (code_sec))
4968 {
4969 *sec = bfd_und_section_ptr;
4970 isym->st_shndx = SHN_UNDEF;
4971 }
4972 }
4973 else if (*sec != NULL
4974 && strcmp ((*sec)->name, ".toc") == 0
4975 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4976 {
4977 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4978 if (htab != NULL)
4979 htab->params->object_in_toc = 1;
4980 }
4981
4982 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4983 {
4984 if (abiversion (ibfd) == 0)
4985 set_abiversion (ibfd, 2);
4986 else if (abiversion (ibfd) == 1)
4987 {
4988 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4989 " for ABI version 1\n"), name);
4990 bfd_set_error (bfd_error_bad_value);
4991 return FALSE;
4992 }
4993 }
4994
4995 return TRUE;
4996 }
4997
4998 /* Merge non-visibility st_other attributes: local entry point. */
4999
5000 static void
5001 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5002 const Elf_Internal_Sym *isym,
5003 bfd_boolean definition,
5004 bfd_boolean dynamic)
5005 {
5006 if (definition && !dynamic)
5007 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5008 | ELF_ST_VISIBILITY (h->other));
5009 }
5010
5011 /* This function makes an old ABI object reference to ".bar" cause the
5012 inclusion of a new ABI object archive that defines "bar".
5013 NAME is a symbol defined in an archive. Return a symbol in the hash
5014 table that might be satisfied by the archive symbols. */
5015
5016 static struct elf_link_hash_entry *
5017 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5018 struct bfd_link_info *info,
5019 const char *name)
5020 {
5021 struct elf_link_hash_entry *h;
5022 char *dot_name;
5023 size_t len;
5024
5025 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5026 if (h != NULL
5027 /* Don't return this sym if it is a fake function descriptor
5028 created by add_symbol_adjust. */
5029 && !(h->root.type == bfd_link_hash_undefweak
5030 && ((struct ppc_link_hash_entry *) h)->fake))
5031 return h;
5032
5033 if (name[0] == '.')
5034 return h;
5035
5036 len = strlen (name);
5037 dot_name = bfd_alloc (abfd, len + 2);
5038 if (dot_name == NULL)
5039 return (struct elf_link_hash_entry *) 0 - 1;
5040 dot_name[0] = '.';
5041 memcpy (dot_name + 1, name, len + 1);
5042 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5043 bfd_release (abfd, dot_name);
5044 return h;
5045 }
5046
5047 /* This function satisfies all old ABI object references to ".bar" if a
5048 new ABI object defines "bar". Well, at least, undefined dot symbols
5049 are made weak. This stops later archive searches from including an
5050 object if we already have a function descriptor definition. It also
5051 prevents the linker complaining about undefined symbols.
5052 We also check and correct mismatched symbol visibility here. The
5053 most restrictive visibility of the function descriptor and the
5054 function entry symbol is used. */
5055
5056 static bfd_boolean
5057 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5058 {
5059 struct ppc_link_hash_table *htab;
5060 struct ppc_link_hash_entry *fdh;
5061
5062 if (eh->elf.root.type == bfd_link_hash_indirect)
5063 return TRUE;
5064
5065 if (eh->elf.root.type == bfd_link_hash_warning)
5066 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5067
5068 if (eh->elf.root.root.string[0] != '.')
5069 abort ();
5070
5071 htab = ppc_hash_table (info);
5072 if (htab == NULL)
5073 return FALSE;
5074
5075 fdh = lookup_fdh (eh, htab);
5076 if (fdh == NULL)
5077 {
5078 if (!bfd_link_relocatable (info)
5079 && (eh->elf.root.type == bfd_link_hash_undefined
5080 || eh->elf.root.type == bfd_link_hash_undefweak)
5081 && eh->elf.ref_regular)
5082 {
5083 /* Make an undefweak function descriptor sym, which is enough to
5084 pull in an --as-needed shared lib, but won't cause link
5085 errors. Archives are handled elsewhere. */
5086 fdh = make_fdh (info, eh);
5087 if (fdh == NULL)
5088 return FALSE;
5089 fdh->elf.ref_regular = 1;
5090 }
5091 }
5092 else
5093 {
5094 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5095 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5096 if (entry_vis < descr_vis)
5097 fdh->elf.other += entry_vis - descr_vis;
5098 else if (entry_vis > descr_vis)
5099 eh->elf.other += descr_vis - entry_vis;
5100
5101 if ((fdh->elf.root.type == bfd_link_hash_defined
5102 || fdh->elf.root.type == bfd_link_hash_defweak)
5103 && eh->elf.root.type == bfd_link_hash_undefined)
5104 {
5105 eh->elf.root.type = bfd_link_hash_undefweak;
5106 eh->was_undefined = 1;
5107 htab->twiddled_syms = 1;
5108 }
5109 }
5110
5111 return TRUE;
5112 }
5113
5114 /* Set up opd section info and abiversion for IBFD, and process list
5115 of dot-symbols we made in link_hash_newfunc. */
5116
5117 static bfd_boolean
5118 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5119 {
5120 struct ppc_link_hash_table *htab;
5121 struct ppc_link_hash_entry **p, *eh;
5122 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5123
5124 if (opd != NULL && opd->size != 0)
5125 {
5126 if (abiversion (ibfd) == 0)
5127 set_abiversion (ibfd, 1);
5128 else if (abiversion (ibfd) >= 2)
5129 {
5130 /* xgettext:c-format */
5131 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5132 " version %d\n"),
5133 ibfd, abiversion (ibfd));
5134 bfd_set_error (bfd_error_bad_value);
5135 return FALSE;
5136 }
5137
5138 if ((ibfd->flags & DYNAMIC) == 0
5139 && (opd->flags & SEC_RELOC) != 0
5140 && opd->reloc_count != 0
5141 && !bfd_is_abs_section (opd->output_section))
5142 {
5143 /* Garbage collection needs some extra help with .opd sections.
5144 We don't want to necessarily keep everything referenced by
5145 relocs in .opd, as that would keep all functions. Instead,
5146 if we reference an .opd symbol (a function descriptor), we
5147 want to keep the function code symbol's section. This is
5148 easy for global symbols, but for local syms we need to keep
5149 information about the associated function section. */
5150 bfd_size_type amt;
5151 asection **opd_sym_map;
5152
5153 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5154 opd_sym_map = bfd_zalloc (ibfd, amt);
5155 if (opd_sym_map == NULL)
5156 return FALSE;
5157 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5158 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5159 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5160 }
5161 }
5162
5163 if (!is_ppc64_elf (info->output_bfd))
5164 return TRUE;
5165 htab = ppc_hash_table (info);
5166 if (htab == NULL)
5167 return FALSE;
5168
5169 /* For input files without an explicit abiversion in e_flags
5170 we should have flagged any with symbol st_other bits set
5171 as ELFv1 and above flagged those with .opd as ELFv2.
5172 Set the output abiversion if not yet set, and for any input
5173 still ambiguous, take its abiversion from the output.
5174 Differences in ABI are reported later. */
5175 if (abiversion (info->output_bfd) == 0)
5176 set_abiversion (info->output_bfd, abiversion (ibfd));
5177 else if (abiversion (ibfd) == 0)
5178 set_abiversion (ibfd, abiversion (info->output_bfd));
5179
5180 p = &htab->dot_syms;
5181 while ((eh = *p) != NULL)
5182 {
5183 *p = NULL;
5184 if (&eh->elf == htab->elf.hgot)
5185 ;
5186 else if (htab->elf.hgot == NULL
5187 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5188 htab->elf.hgot = &eh->elf;
5189 else if (!add_symbol_adjust (eh, info))
5190 return FALSE;
5191 p = &eh->u.next_dot_sym;
5192 }
5193
5194 /* Clear the list for non-ppc64 input files. */
5195 p = &htab->dot_syms;
5196 while ((eh = *p) != NULL)
5197 {
5198 *p = NULL;
5199 p = &eh->u.next_dot_sym;
5200 }
5201
5202 /* We need to fix the undefs list for any syms we have twiddled to
5203 undefweak. */
5204 if (htab->twiddled_syms)
5205 {
5206 bfd_link_repair_undef_list (&htab->elf.root);
5207 htab->twiddled_syms = 0;
5208 }
5209 return TRUE;
5210 }
5211
5212 /* Undo hash table changes when an --as-needed input file is determined
5213 not to be needed. */
5214
5215 static bfd_boolean
5216 ppc64_elf_notice_as_needed (bfd *ibfd,
5217 struct bfd_link_info *info,
5218 enum notice_asneeded_action act)
5219 {
5220 if (act == notice_not_needed)
5221 {
5222 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5223
5224 if (htab == NULL)
5225 return FALSE;
5226
5227 htab->dot_syms = NULL;
5228 }
5229 return _bfd_elf_notice_as_needed (ibfd, info, act);
5230 }
5231
5232 /* If --just-symbols against a final linked binary, then assume we need
5233 toc adjusting stubs when calling functions defined there. */
5234
5235 static void
5236 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5237 {
5238 if ((sec->flags & SEC_CODE) != 0
5239 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5240 && is_ppc64_elf (sec->owner))
5241 {
5242 if (abiversion (sec->owner) >= 2
5243 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5244 sec->has_toc_reloc = 1;
5245 }
5246 _bfd_elf_link_just_syms (sec, info);
5247 }
5248
5249 static struct plt_entry **
5250 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5251 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5252 {
5253 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5254 struct plt_entry **local_plt;
5255 unsigned char *local_got_tls_masks;
5256
5257 if (local_got_ents == NULL)
5258 {
5259 bfd_size_type size = symtab_hdr->sh_info;
5260
5261 size *= (sizeof (*local_got_ents)
5262 + sizeof (*local_plt)
5263 + sizeof (*local_got_tls_masks));
5264 local_got_ents = bfd_zalloc (abfd, size);
5265 if (local_got_ents == NULL)
5266 return NULL;
5267 elf_local_got_ents (abfd) = local_got_ents;
5268 }
5269
5270 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5271 {
5272 struct got_entry *ent;
5273
5274 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5275 if (ent->addend == r_addend
5276 && ent->owner == abfd
5277 && ent->tls_type == tls_type)
5278 break;
5279 if (ent == NULL)
5280 {
5281 bfd_size_type amt = sizeof (*ent);
5282 ent = bfd_alloc (abfd, amt);
5283 if (ent == NULL)
5284 return FALSE;
5285 ent->next = local_got_ents[r_symndx];
5286 ent->addend = r_addend;
5287 ent->owner = abfd;
5288 ent->tls_type = tls_type;
5289 ent->is_indirect = FALSE;
5290 ent->got.refcount = 0;
5291 local_got_ents[r_symndx] = ent;
5292 }
5293 ent->got.refcount += 1;
5294 }
5295
5296 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5297 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5298 local_got_tls_masks[r_symndx] |= tls_type;
5299
5300 return local_plt + r_symndx;
5301 }
5302
5303 static bfd_boolean
5304 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5305 {
5306 struct plt_entry *ent;
5307
5308 for (ent = *plist; ent != NULL; ent = ent->next)
5309 if (ent->addend == addend)
5310 break;
5311 if (ent == NULL)
5312 {
5313 bfd_size_type amt = sizeof (*ent);
5314 ent = bfd_alloc (abfd, amt);
5315 if (ent == NULL)
5316 return FALSE;
5317 ent->next = *plist;
5318 ent->addend = addend;
5319 ent->plt.refcount = 0;
5320 *plist = ent;
5321 }
5322 ent->plt.refcount += 1;
5323 return TRUE;
5324 }
5325
5326 static bfd_boolean
5327 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5328 {
5329 return (r_type == R_PPC64_REL24
5330 || r_type == R_PPC64_REL14
5331 || r_type == R_PPC64_REL14_BRTAKEN
5332 || r_type == R_PPC64_REL14_BRNTAKEN
5333 || r_type == R_PPC64_ADDR24
5334 || r_type == R_PPC64_ADDR14
5335 || r_type == R_PPC64_ADDR14_BRTAKEN
5336 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5337 }
5338
5339 /* Look through the relocs for a section during the first phase, and
5340 calculate needed space in the global offset table, procedure
5341 linkage table, and dynamic reloc sections. */
5342
5343 static bfd_boolean
5344 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5345 asection *sec, const Elf_Internal_Rela *relocs)
5346 {
5347 struct ppc_link_hash_table *htab;
5348 Elf_Internal_Shdr *symtab_hdr;
5349 struct elf_link_hash_entry **sym_hashes;
5350 const Elf_Internal_Rela *rel;
5351 const Elf_Internal_Rela *rel_end;
5352 asection *sreloc;
5353 asection **opd_sym_map;
5354 struct elf_link_hash_entry *tga, *dottga;
5355
5356 if (bfd_link_relocatable (info))
5357 return TRUE;
5358
5359 /* Don't do anything special with non-loaded, non-alloced sections.
5360 In particular, any relocs in such sections should not affect GOT
5361 and PLT reference counting (ie. we don't allow them to create GOT
5362 or PLT entries), there's no possibility or desire to optimize TLS
5363 relocs, and there's not much point in propagating relocs to shared
5364 libs that the dynamic linker won't relocate. */
5365 if ((sec->flags & SEC_ALLOC) == 0)
5366 return TRUE;
5367
5368 BFD_ASSERT (is_ppc64_elf (abfd));
5369
5370 htab = ppc_hash_table (info);
5371 if (htab == NULL)
5372 return FALSE;
5373
5374 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5375 FALSE, FALSE, TRUE);
5376 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5377 FALSE, FALSE, TRUE);
5378 symtab_hdr = &elf_symtab_hdr (abfd);
5379 sym_hashes = elf_sym_hashes (abfd);
5380 sreloc = NULL;
5381 opd_sym_map = NULL;
5382 if (ppc64_elf_section_data (sec) != NULL
5383 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5384 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5385
5386 rel_end = relocs + sec->reloc_count;
5387 for (rel = relocs; rel < rel_end; rel++)
5388 {
5389 unsigned long r_symndx;
5390 struct elf_link_hash_entry *h;
5391 enum elf_ppc64_reloc_type r_type;
5392 int tls_type;
5393 struct _ppc64_elf_section_data *ppc64_sec;
5394 struct plt_entry **ifunc, **plt_list;
5395
5396 r_symndx = ELF64_R_SYM (rel->r_info);
5397 if (r_symndx < symtab_hdr->sh_info)
5398 h = NULL;
5399 else
5400 {
5401 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5402 h = elf_follow_link (h);
5403
5404 /* PR15323, ref flags aren't set for references in the same
5405 object. */
5406 h->root.non_ir_ref = 1;
5407
5408 if (h == htab->elf.hgot)
5409 sec->has_toc_reloc = 1;
5410 }
5411
5412 tls_type = 0;
5413 ifunc = NULL;
5414 if (h != NULL)
5415 {
5416 if (h->type == STT_GNU_IFUNC)
5417 {
5418 h->needs_plt = 1;
5419 ifunc = &h->plt.plist;
5420 }
5421 }
5422 else
5423 {
5424 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5425 abfd, r_symndx);
5426 if (isym == NULL)
5427 return FALSE;
5428
5429 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5430 {
5431 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5432 rel->r_addend, PLT_IFUNC);
5433 if (ifunc == NULL)
5434 return FALSE;
5435 }
5436 }
5437
5438 r_type = ELF64_R_TYPE (rel->r_info);
5439 switch (r_type)
5440 {
5441 case R_PPC64_TLSGD:
5442 case R_PPC64_TLSLD:
5443 /* These special tls relocs tie a call to __tls_get_addr with
5444 its parameter symbol. */
5445 break;
5446
5447 case R_PPC64_GOT_TLSLD16:
5448 case R_PPC64_GOT_TLSLD16_LO:
5449 case R_PPC64_GOT_TLSLD16_HI:
5450 case R_PPC64_GOT_TLSLD16_HA:
5451 tls_type = TLS_TLS | TLS_LD;
5452 goto dogottls;
5453
5454 case R_PPC64_GOT_TLSGD16:
5455 case R_PPC64_GOT_TLSGD16_LO:
5456 case R_PPC64_GOT_TLSGD16_HI:
5457 case R_PPC64_GOT_TLSGD16_HA:
5458 tls_type = TLS_TLS | TLS_GD;
5459 goto dogottls;
5460
5461 case R_PPC64_GOT_TPREL16_DS:
5462 case R_PPC64_GOT_TPREL16_LO_DS:
5463 case R_PPC64_GOT_TPREL16_HI:
5464 case R_PPC64_GOT_TPREL16_HA:
5465 if (bfd_link_pic (info))
5466 info->flags |= DF_STATIC_TLS;
5467 tls_type = TLS_TLS | TLS_TPREL;
5468 goto dogottls;
5469
5470 case R_PPC64_GOT_DTPREL16_DS:
5471 case R_PPC64_GOT_DTPREL16_LO_DS:
5472 case R_PPC64_GOT_DTPREL16_HI:
5473 case R_PPC64_GOT_DTPREL16_HA:
5474 tls_type = TLS_TLS | TLS_DTPREL;
5475 dogottls:
5476 sec->has_tls_reloc = 1;
5477 /* Fall through */
5478
5479 case R_PPC64_GOT16:
5480 case R_PPC64_GOT16_DS:
5481 case R_PPC64_GOT16_HA:
5482 case R_PPC64_GOT16_HI:
5483 case R_PPC64_GOT16_LO:
5484 case R_PPC64_GOT16_LO_DS:
5485 /* This symbol requires a global offset table entry. */
5486 sec->has_toc_reloc = 1;
5487 if (r_type == R_PPC64_GOT_TLSLD16
5488 || r_type == R_PPC64_GOT_TLSGD16
5489 || r_type == R_PPC64_GOT_TPREL16_DS
5490 || r_type == R_PPC64_GOT_DTPREL16_DS
5491 || r_type == R_PPC64_GOT16
5492 || r_type == R_PPC64_GOT16_DS)
5493 {
5494 htab->do_multi_toc = 1;
5495 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5496 }
5497
5498 if (ppc64_elf_tdata (abfd)->got == NULL
5499 && !create_got_section (abfd, info))
5500 return FALSE;
5501
5502 if (h != NULL)
5503 {
5504 struct ppc_link_hash_entry *eh;
5505 struct got_entry *ent;
5506
5507 eh = (struct ppc_link_hash_entry *) h;
5508 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5509 if (ent->addend == rel->r_addend
5510 && ent->owner == abfd
5511 && ent->tls_type == tls_type)
5512 break;
5513 if (ent == NULL)
5514 {
5515 bfd_size_type amt = sizeof (*ent);
5516 ent = bfd_alloc (abfd, amt);
5517 if (ent == NULL)
5518 return FALSE;
5519 ent->next = eh->elf.got.glist;
5520 ent->addend = rel->r_addend;
5521 ent->owner = abfd;
5522 ent->tls_type = tls_type;
5523 ent->is_indirect = FALSE;
5524 ent->got.refcount = 0;
5525 eh->elf.got.glist = ent;
5526 }
5527 ent->got.refcount += 1;
5528 eh->tls_mask |= tls_type;
5529 }
5530 else
5531 /* This is a global offset table entry for a local symbol. */
5532 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5533 rel->r_addend, tls_type))
5534 return FALSE;
5535
5536 /* We may also need a plt entry if the symbol turns out to be
5537 an ifunc. */
5538 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5539 {
5540 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5541 return FALSE;
5542 }
5543 break;
5544
5545 case R_PPC64_PLT16_HA:
5546 case R_PPC64_PLT16_HI:
5547 case R_PPC64_PLT16_LO:
5548 case R_PPC64_PLT32:
5549 case R_PPC64_PLT64:
5550 /* This symbol requires a procedure linkage table entry. */
5551 plt_list = ifunc;
5552 if (h != NULL)
5553 {
5554 h->needs_plt = 1;
5555 if (h->root.root.string[0] == '.'
5556 && h->root.root.string[1] != '\0')
5557 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5558 plt_list = &h->plt.plist;
5559 }
5560 if (plt_list == NULL)
5561 {
5562 /* It does not make sense to have a procedure linkage
5563 table entry for a non-ifunc local symbol. */
5564 info->callbacks->einfo
5565 /* xgettext:c-format */
5566 (_("%P: %H: %s reloc against local symbol\n"),
5567 abfd, sec, rel->r_offset,
5568 ppc64_elf_howto_table[r_type]->name);
5569 bfd_set_error (bfd_error_bad_value);
5570 return FALSE;
5571 }
5572 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5573 return FALSE;
5574 break;
5575
5576 /* The following relocations don't need to propagate the
5577 relocation if linking a shared object since they are
5578 section relative. */
5579 case R_PPC64_SECTOFF:
5580 case R_PPC64_SECTOFF_LO:
5581 case R_PPC64_SECTOFF_HI:
5582 case R_PPC64_SECTOFF_HA:
5583 case R_PPC64_SECTOFF_DS:
5584 case R_PPC64_SECTOFF_LO_DS:
5585 case R_PPC64_DTPREL16:
5586 case R_PPC64_DTPREL16_LO:
5587 case R_PPC64_DTPREL16_HI:
5588 case R_PPC64_DTPREL16_HA:
5589 case R_PPC64_DTPREL16_DS:
5590 case R_PPC64_DTPREL16_LO_DS:
5591 case R_PPC64_DTPREL16_HIGH:
5592 case R_PPC64_DTPREL16_HIGHA:
5593 case R_PPC64_DTPREL16_HIGHER:
5594 case R_PPC64_DTPREL16_HIGHERA:
5595 case R_PPC64_DTPREL16_HIGHEST:
5596 case R_PPC64_DTPREL16_HIGHESTA:
5597 break;
5598
5599 /* Nor do these. */
5600 case R_PPC64_REL16:
5601 case R_PPC64_REL16_LO:
5602 case R_PPC64_REL16_HI:
5603 case R_PPC64_REL16_HA:
5604 case R_PPC64_REL16DX_HA:
5605 break;
5606
5607 /* Not supported as a dynamic relocation. */
5608 case R_PPC64_ADDR64_LOCAL:
5609 if (bfd_link_pic (info))
5610 {
5611 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5612 ppc_howto_init ();
5613 /* xgettext:c-format */
5614 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5615 "in shared libraries and PIEs.\n"),
5616 abfd, sec, rel->r_offset,
5617 ppc64_elf_howto_table[r_type]->name);
5618 bfd_set_error (bfd_error_bad_value);
5619 return FALSE;
5620 }
5621 break;
5622
5623 case R_PPC64_TOC16:
5624 case R_PPC64_TOC16_DS:
5625 htab->do_multi_toc = 1;
5626 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5627 /* Fall through. */
5628 case R_PPC64_TOC16_LO:
5629 case R_PPC64_TOC16_HI:
5630 case R_PPC64_TOC16_HA:
5631 case R_PPC64_TOC16_LO_DS:
5632 sec->has_toc_reloc = 1;
5633 break;
5634
5635 /* Marker reloc. */
5636 case R_PPC64_ENTRY:
5637 break;
5638
5639 /* This relocation describes the C++ object vtable hierarchy.
5640 Reconstruct it for later use during GC. */
5641 case R_PPC64_GNU_VTINHERIT:
5642 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5643 return FALSE;
5644 break;
5645
5646 /* This relocation describes which C++ vtable entries are actually
5647 used. Record for later use during GC. */
5648 case R_PPC64_GNU_VTENTRY:
5649 BFD_ASSERT (h != NULL);
5650 if (h != NULL
5651 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5652 return FALSE;
5653 break;
5654
5655 case R_PPC64_REL14:
5656 case R_PPC64_REL14_BRTAKEN:
5657 case R_PPC64_REL14_BRNTAKEN:
5658 {
5659 asection *dest = NULL;
5660
5661 /* Heuristic: If jumping outside our section, chances are
5662 we are going to need a stub. */
5663 if (h != NULL)
5664 {
5665 /* If the sym is weak it may be overridden later, so
5666 don't assume we know where a weak sym lives. */
5667 if (h->root.type == bfd_link_hash_defined)
5668 dest = h->root.u.def.section;
5669 }
5670 else
5671 {
5672 Elf_Internal_Sym *isym;
5673
5674 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5675 abfd, r_symndx);
5676 if (isym == NULL)
5677 return FALSE;
5678
5679 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5680 }
5681
5682 if (dest != sec)
5683 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5684 }
5685 /* Fall through. */
5686
5687 case R_PPC64_REL24:
5688 plt_list = ifunc;
5689 if (h != NULL)
5690 {
5691 h->needs_plt = 1;
5692 if (h->root.root.string[0] == '.'
5693 && h->root.root.string[1] != '\0')
5694 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5695
5696 if (h == tga || h == dottga)
5697 {
5698 sec->has_tls_reloc = 1;
5699 if (rel != relocs
5700 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5701 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5702 /* We have a new-style __tls_get_addr call with
5703 a marker reloc. */
5704 ;
5705 else
5706 /* Mark this section as having an old-style call. */
5707 sec->has_tls_get_addr_call = 1;
5708 }
5709 plt_list = &h->plt.plist;
5710 }
5711
5712 /* We may need a .plt entry if the function this reloc
5713 refers to is in a shared lib. */
5714 if (plt_list
5715 && !update_plt_info (abfd, plt_list, rel->r_addend))
5716 return FALSE;
5717 break;
5718
5719 case R_PPC64_ADDR14:
5720 case R_PPC64_ADDR14_BRNTAKEN:
5721 case R_PPC64_ADDR14_BRTAKEN:
5722 case R_PPC64_ADDR24:
5723 goto dodyn;
5724
5725 case R_PPC64_TPREL64:
5726 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5727 if (bfd_link_pic (info))
5728 info->flags |= DF_STATIC_TLS;
5729 goto dotlstoc;
5730
5731 case R_PPC64_DTPMOD64:
5732 if (rel + 1 < rel_end
5733 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5734 && rel[1].r_offset == rel->r_offset + 8)
5735 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5736 else
5737 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5738 goto dotlstoc;
5739
5740 case R_PPC64_DTPREL64:
5741 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5742 if (rel != relocs
5743 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5744 && rel[-1].r_offset == rel->r_offset - 8)
5745 /* This is the second reloc of a dtpmod, dtprel pair.
5746 Don't mark with TLS_DTPREL. */
5747 goto dodyn;
5748
5749 dotlstoc:
5750 sec->has_tls_reloc = 1;
5751 if (h != NULL)
5752 {
5753 struct ppc_link_hash_entry *eh;
5754 eh = (struct ppc_link_hash_entry *) h;
5755 eh->tls_mask |= tls_type;
5756 }
5757 else
5758 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5759 rel->r_addend, tls_type))
5760 return FALSE;
5761
5762 ppc64_sec = ppc64_elf_section_data (sec);
5763 if (ppc64_sec->sec_type != sec_toc)
5764 {
5765 bfd_size_type amt;
5766
5767 /* One extra to simplify get_tls_mask. */
5768 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5769 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5770 if (ppc64_sec->u.toc.symndx == NULL)
5771 return FALSE;
5772 amt = sec->size * sizeof (bfd_vma) / 8;
5773 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5774 if (ppc64_sec->u.toc.add == NULL)
5775 return FALSE;
5776 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5777 ppc64_sec->sec_type = sec_toc;
5778 }
5779 BFD_ASSERT (rel->r_offset % 8 == 0);
5780 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5781 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5782
5783 /* Mark the second slot of a GD or LD entry.
5784 -1 to indicate GD and -2 to indicate LD. */
5785 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5786 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5787 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5788 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5789 goto dodyn;
5790
5791 case R_PPC64_TPREL16:
5792 case R_PPC64_TPREL16_LO:
5793 case R_PPC64_TPREL16_HI:
5794 case R_PPC64_TPREL16_HA:
5795 case R_PPC64_TPREL16_DS:
5796 case R_PPC64_TPREL16_LO_DS:
5797 case R_PPC64_TPREL16_HIGH:
5798 case R_PPC64_TPREL16_HIGHA:
5799 case R_PPC64_TPREL16_HIGHER:
5800 case R_PPC64_TPREL16_HIGHERA:
5801 case R_PPC64_TPREL16_HIGHEST:
5802 case R_PPC64_TPREL16_HIGHESTA:
5803 if (bfd_link_pic (info))
5804 {
5805 info->flags |= DF_STATIC_TLS;
5806 goto dodyn;
5807 }
5808 break;
5809
5810 case R_PPC64_ADDR64:
5811 if (opd_sym_map != NULL
5812 && rel + 1 < rel_end
5813 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5814 {
5815 if (h != NULL)
5816 {
5817 if (h->root.root.string[0] == '.'
5818 && h->root.root.string[1] != 0
5819 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5820 ;
5821 else
5822 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5823 }
5824 else
5825 {
5826 asection *s;
5827 Elf_Internal_Sym *isym;
5828
5829 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5830 abfd, r_symndx);
5831 if (isym == NULL)
5832 return FALSE;
5833
5834 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5835 if (s != NULL && s != sec)
5836 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5837 }
5838 }
5839 /* Fall through. */
5840
5841 case R_PPC64_ADDR16:
5842 case R_PPC64_ADDR16_DS:
5843 case R_PPC64_ADDR16_HA:
5844 case R_PPC64_ADDR16_HI:
5845 case R_PPC64_ADDR16_HIGH:
5846 case R_PPC64_ADDR16_HIGHA:
5847 case R_PPC64_ADDR16_HIGHER:
5848 case R_PPC64_ADDR16_HIGHERA:
5849 case R_PPC64_ADDR16_HIGHEST:
5850 case R_PPC64_ADDR16_HIGHESTA:
5851 case R_PPC64_ADDR16_LO:
5852 case R_PPC64_ADDR16_LO_DS:
5853 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5854 && rel->r_addend == 0)
5855 {
5856 /* We may need a .plt entry if this reloc refers to a
5857 function in a shared lib. */
5858 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5859 return FALSE;
5860 h->pointer_equality_needed = 1;
5861 }
5862 /* Fall through. */
5863
5864 case R_PPC64_REL30:
5865 case R_PPC64_REL32:
5866 case R_PPC64_REL64:
5867 case R_PPC64_ADDR32:
5868 case R_PPC64_UADDR16:
5869 case R_PPC64_UADDR32:
5870 case R_PPC64_UADDR64:
5871 case R_PPC64_TOC:
5872 if (h != NULL && !bfd_link_pic (info))
5873 /* We may need a copy reloc. */
5874 h->non_got_ref = 1;
5875
5876 /* Don't propagate .opd relocs. */
5877 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5878 break;
5879
5880 /* If we are creating a shared library, and this is a reloc
5881 against a global symbol, or a non PC relative reloc
5882 against a local symbol, then we need to copy the reloc
5883 into the shared library. However, if we are linking with
5884 -Bsymbolic, we do not need to copy a reloc against a
5885 global symbol which is defined in an object we are
5886 including in the link (i.e., DEF_REGULAR is set). At
5887 this point we have not seen all the input files, so it is
5888 possible that DEF_REGULAR is not set now but will be set
5889 later (it is never cleared). In case of a weak definition,
5890 DEF_REGULAR may be cleared later by a strong definition in
5891 a shared library. We account for that possibility below by
5892 storing information in the dyn_relocs field of the hash
5893 table entry. A similar situation occurs when creating
5894 shared libraries and symbol visibility changes render the
5895 symbol local.
5896
5897 If on the other hand, we are creating an executable, we
5898 may need to keep relocations for symbols satisfied by a
5899 dynamic library if we manage to avoid copy relocs for the
5900 symbol. */
5901 dodyn:
5902 if ((bfd_link_pic (info)
5903 && (must_be_dyn_reloc (info, r_type)
5904 || (h != NULL
5905 && (!SYMBOLIC_BIND (info, h)
5906 || h->root.type == bfd_link_hash_defweak
5907 || !h->def_regular))))
5908 || (ELIMINATE_COPY_RELOCS
5909 && !bfd_link_pic (info)
5910 && h != NULL
5911 && (h->root.type == bfd_link_hash_defweak
5912 || !h->def_regular))
5913 || (!bfd_link_pic (info)
5914 && ifunc != NULL))
5915 {
5916 /* We must copy these reloc types into the output file.
5917 Create a reloc section in dynobj and make room for
5918 this reloc. */
5919 if (sreloc == NULL)
5920 {
5921 sreloc = _bfd_elf_make_dynamic_reloc_section
5922 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5923
5924 if (sreloc == NULL)
5925 return FALSE;
5926 }
5927
5928 /* If this is a global symbol, we count the number of
5929 relocations we need for this symbol. */
5930 if (h != NULL)
5931 {
5932 struct elf_dyn_relocs *p;
5933 struct elf_dyn_relocs **head;
5934
5935 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5936 p = *head;
5937 if (p == NULL || p->sec != sec)
5938 {
5939 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5940 if (p == NULL)
5941 return FALSE;
5942 p->next = *head;
5943 *head = p;
5944 p->sec = sec;
5945 p->count = 0;
5946 p->pc_count = 0;
5947 }
5948 p->count += 1;
5949 if (!must_be_dyn_reloc (info, r_type))
5950 p->pc_count += 1;
5951 }
5952 else
5953 {
5954 /* Track dynamic relocs needed for local syms too.
5955 We really need local syms available to do this
5956 easily. Oh well. */
5957 struct ppc_dyn_relocs *p;
5958 struct ppc_dyn_relocs **head;
5959 bfd_boolean is_ifunc;
5960 asection *s;
5961 void *vpp;
5962 Elf_Internal_Sym *isym;
5963
5964 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5965 abfd, r_symndx);
5966 if (isym == NULL)
5967 return FALSE;
5968
5969 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5970 if (s == NULL)
5971 s = sec;
5972
5973 vpp = &elf_section_data (s)->local_dynrel;
5974 head = (struct ppc_dyn_relocs **) vpp;
5975 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5976 p = *head;
5977 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5978 p = p->next;
5979 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5980 {
5981 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5982 if (p == NULL)
5983 return FALSE;
5984 p->next = *head;
5985 *head = p;
5986 p->sec = sec;
5987 p->ifunc = is_ifunc;
5988 p->count = 0;
5989 }
5990 p->count += 1;
5991 }
5992 }
5993 break;
5994
5995 default:
5996 break;
5997 }
5998 }
5999
6000 return TRUE;
6001 }
6002
6003 /* Merge backend specific data from an object file to the output
6004 object file when linking. */
6005
6006 static bfd_boolean
6007 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6008 {
6009 bfd *obfd = info->output_bfd;
6010 unsigned long iflags, oflags;
6011
6012 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6013 return TRUE;
6014
6015 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6016 return TRUE;
6017
6018 if (!_bfd_generic_verify_endian_match (ibfd, info))
6019 return FALSE;
6020
6021 iflags = elf_elfheader (ibfd)->e_flags;
6022 oflags = elf_elfheader (obfd)->e_flags;
6023
6024 if (iflags & ~EF_PPC64_ABI)
6025 {
6026 _bfd_error_handler
6027 /* xgettext:c-format */
6028 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6029 bfd_set_error (bfd_error_bad_value);
6030 return FALSE;
6031 }
6032 else if (iflags != oflags && iflags != 0)
6033 {
6034 _bfd_error_handler
6035 /* xgettext:c-format */
6036 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6037 ibfd, iflags, oflags);
6038 bfd_set_error (bfd_error_bad_value);
6039 return FALSE;
6040 }
6041
6042 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6043
6044 /* Merge Tag_compatibility attributes and any common GNU ones. */
6045 _bfd_elf_merge_object_attributes (ibfd, info);
6046
6047 return TRUE;
6048 }
6049
6050 static bfd_boolean
6051 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6052 {
6053 /* Print normal ELF private data. */
6054 _bfd_elf_print_private_bfd_data (abfd, ptr);
6055
6056 if (elf_elfheader (abfd)->e_flags != 0)
6057 {
6058 FILE *file = ptr;
6059
6060 fprintf (file, _("private flags = 0x%lx:"),
6061 elf_elfheader (abfd)->e_flags);
6062
6063 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6064 fprintf (file, _(" [abiv%ld]"),
6065 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6066 fputc ('\n', file);
6067 }
6068
6069 return TRUE;
6070 }
6071
6072 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6073 of the code entry point, and its section, which must be in the same
6074 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6075
6076 static bfd_vma
6077 opd_entry_value (asection *opd_sec,
6078 bfd_vma offset,
6079 asection **code_sec,
6080 bfd_vma *code_off,
6081 bfd_boolean in_code_sec)
6082 {
6083 bfd *opd_bfd = opd_sec->owner;
6084 Elf_Internal_Rela *relocs;
6085 Elf_Internal_Rela *lo, *hi, *look;
6086 bfd_vma val;
6087
6088 /* No relocs implies we are linking a --just-symbols object, or looking
6089 at a final linked executable with addr2line or somesuch. */
6090 if (opd_sec->reloc_count == 0)
6091 {
6092 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6093
6094 if (contents == NULL)
6095 {
6096 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6097 return (bfd_vma) -1;
6098 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6099 }
6100
6101 /* PR 17512: file: 64b9dfbb. */
6102 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6103 return (bfd_vma) -1;
6104
6105 val = bfd_get_64 (opd_bfd, contents + offset);
6106 if (code_sec != NULL)
6107 {
6108 asection *sec, *likely = NULL;
6109
6110 if (in_code_sec)
6111 {
6112 sec = *code_sec;
6113 if (sec->vma <= val
6114 && val < sec->vma + sec->size)
6115 likely = sec;
6116 else
6117 val = -1;
6118 }
6119 else
6120 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6121 if (sec->vma <= val
6122 && (sec->flags & SEC_LOAD) != 0
6123 && (sec->flags & SEC_ALLOC) != 0)
6124 likely = sec;
6125 if (likely != NULL)
6126 {
6127 *code_sec = likely;
6128 if (code_off != NULL)
6129 *code_off = val - likely->vma;
6130 }
6131 }
6132 return val;
6133 }
6134
6135 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6136
6137 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6138 if (relocs == NULL)
6139 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6140 /* PR 17512: file: df8e1fd6. */
6141 if (relocs == NULL)
6142 return (bfd_vma) -1;
6143
6144 /* Go find the opd reloc at the sym address. */
6145 lo = relocs;
6146 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6147 val = (bfd_vma) -1;
6148 while (lo < hi)
6149 {
6150 look = lo + (hi - lo) / 2;
6151 if (look->r_offset < offset)
6152 lo = look + 1;
6153 else if (look->r_offset > offset)
6154 hi = look;
6155 else
6156 {
6157 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6158
6159 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6160 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6161 {
6162 unsigned long symndx = ELF64_R_SYM (look->r_info);
6163 asection *sec = NULL;
6164
6165 if (symndx >= symtab_hdr->sh_info
6166 && elf_sym_hashes (opd_bfd) != NULL)
6167 {
6168 struct elf_link_hash_entry **sym_hashes;
6169 struct elf_link_hash_entry *rh;
6170
6171 sym_hashes = elf_sym_hashes (opd_bfd);
6172 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6173 if (rh != NULL)
6174 {
6175 rh = elf_follow_link (rh);
6176 if (rh->root.type != bfd_link_hash_defined
6177 && rh->root.type != bfd_link_hash_defweak)
6178 break;
6179 if (rh->root.u.def.section->owner == opd_bfd)
6180 {
6181 val = rh->root.u.def.value;
6182 sec = rh->root.u.def.section;
6183 }
6184 }
6185 }
6186
6187 if (sec == NULL)
6188 {
6189 Elf_Internal_Sym *sym;
6190
6191 if (symndx < symtab_hdr->sh_info)
6192 {
6193 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6194 if (sym == NULL)
6195 {
6196 size_t symcnt = symtab_hdr->sh_info;
6197 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6198 symcnt, 0,
6199 NULL, NULL, NULL);
6200 if (sym == NULL)
6201 break;
6202 symtab_hdr->contents = (bfd_byte *) sym;
6203 }
6204 sym += symndx;
6205 }
6206 else
6207 {
6208 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6209 1, symndx,
6210 NULL, NULL, NULL);
6211 if (sym == NULL)
6212 break;
6213 }
6214 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6215 if (sec == NULL)
6216 break;
6217 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6218 val = sym->st_value;
6219 }
6220
6221 val += look->r_addend;
6222 if (code_off != NULL)
6223 *code_off = val;
6224 if (code_sec != NULL)
6225 {
6226 if (in_code_sec && *code_sec != sec)
6227 return -1;
6228 else
6229 *code_sec = sec;
6230 }
6231 if (sec->output_section != NULL)
6232 val += sec->output_section->vma + sec->output_offset;
6233 }
6234 break;
6235 }
6236 }
6237
6238 return val;
6239 }
6240
6241 /* If the ELF symbol SYM might be a function in SEC, return the
6242 function size and set *CODE_OFF to the function's entry point,
6243 otherwise return zero. */
6244
6245 static bfd_size_type
6246 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6247 bfd_vma *code_off)
6248 {
6249 bfd_size_type size;
6250
6251 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6252 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6253 return 0;
6254
6255 size = 0;
6256 if (!(sym->flags & BSF_SYNTHETIC))
6257 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6258
6259 if (strcmp (sym->section->name, ".opd") == 0)
6260 {
6261 struct _opd_sec_data *opd = get_opd_info (sym->section);
6262 bfd_vma symval = sym->value;
6263
6264 if (opd != NULL
6265 && opd->adjust != NULL
6266 && elf_section_data (sym->section)->relocs != NULL)
6267 {
6268 /* opd_entry_value will use cached relocs that have been
6269 adjusted, but with raw symbols. That means both local
6270 and global symbols need adjusting. */
6271 long adjust = opd->adjust[OPD_NDX (symval)];
6272 if (adjust == -1)
6273 return 0;
6274 symval += adjust;
6275 }
6276
6277 if (opd_entry_value (sym->section, symval,
6278 &sec, code_off, TRUE) == (bfd_vma) -1)
6279 return 0;
6280 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6281 symbol. This size has nothing to do with the code size of the
6282 function, which is what we're supposed to return, but the
6283 code size isn't available without looking up the dot-sym.
6284 However, doing that would be a waste of time particularly
6285 since elf_find_function will look at the dot-sym anyway.
6286 Now, elf_find_function will keep the largest size of any
6287 function sym found at the code address of interest, so return
6288 1 here to avoid it incorrectly caching a larger function size
6289 for a small function. This does mean we return the wrong
6290 size for a new-ABI function of size 24, but all that does is
6291 disable caching for such functions. */
6292 if (size == 24)
6293 size = 1;
6294 }
6295 else
6296 {
6297 if (sym->section != sec)
6298 return 0;
6299 *code_off = sym->value;
6300 }
6301 if (size == 0)
6302 size = 1;
6303 return size;
6304 }
6305
6306 /* Return true if symbol is defined in a regular object file. */
6307
6308 static bfd_boolean
6309 is_static_defined (struct elf_link_hash_entry *h)
6310 {
6311 return ((h->root.type == bfd_link_hash_defined
6312 || h->root.type == bfd_link_hash_defweak)
6313 && h->root.u.def.section != NULL
6314 && h->root.u.def.section->output_section != NULL);
6315 }
6316
6317 /* If FDH is a function descriptor symbol, return the associated code
6318 entry symbol if it is defined. Return NULL otherwise. */
6319
6320 static struct ppc_link_hash_entry *
6321 defined_code_entry (struct ppc_link_hash_entry *fdh)
6322 {
6323 if (fdh->is_func_descriptor)
6324 {
6325 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6326 if (fh->elf.root.type == bfd_link_hash_defined
6327 || fh->elf.root.type == bfd_link_hash_defweak)
6328 return fh;
6329 }
6330 return NULL;
6331 }
6332
6333 /* If FH is a function code entry symbol, return the associated
6334 function descriptor symbol if it is defined. Return NULL otherwise. */
6335
6336 static struct ppc_link_hash_entry *
6337 defined_func_desc (struct ppc_link_hash_entry *fh)
6338 {
6339 if (fh->oh != NULL
6340 && fh->oh->is_func_descriptor)
6341 {
6342 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6343 if (fdh->elf.root.type == bfd_link_hash_defined
6344 || fdh->elf.root.type == bfd_link_hash_defweak)
6345 return fdh;
6346 }
6347 return NULL;
6348 }
6349
6350 /* Mark all our entry sym sections, both opd and code section. */
6351
6352 static void
6353 ppc64_elf_gc_keep (struct bfd_link_info *info)
6354 {
6355 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6356 struct bfd_sym_chain *sym;
6357
6358 if (htab == NULL)
6359 return;
6360
6361 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6362 {
6363 struct ppc_link_hash_entry *eh, *fh;
6364 asection *sec;
6365
6366 eh = (struct ppc_link_hash_entry *)
6367 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6368 if (eh == NULL)
6369 continue;
6370 if (eh->elf.root.type != bfd_link_hash_defined
6371 && eh->elf.root.type != bfd_link_hash_defweak)
6372 continue;
6373
6374 fh = defined_code_entry (eh);
6375 if (fh != NULL)
6376 {
6377 sec = fh->elf.root.u.def.section;
6378 sec->flags |= SEC_KEEP;
6379 }
6380 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6381 && opd_entry_value (eh->elf.root.u.def.section,
6382 eh->elf.root.u.def.value,
6383 &sec, NULL, FALSE) != (bfd_vma) -1)
6384 sec->flags |= SEC_KEEP;
6385
6386 sec = eh->elf.root.u.def.section;
6387 sec->flags |= SEC_KEEP;
6388 }
6389 }
6390
6391 /* Mark sections containing dynamically referenced symbols. When
6392 building shared libraries, we must assume that any visible symbol is
6393 referenced. */
6394
6395 static bfd_boolean
6396 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6397 {
6398 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6399 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6400 struct ppc_link_hash_entry *fdh;
6401 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6402
6403 /* Dynamic linking info is on the func descriptor sym. */
6404 fdh = defined_func_desc (eh);
6405 if (fdh != NULL)
6406 eh = fdh;
6407
6408 if ((eh->elf.root.type == bfd_link_hash_defined
6409 || eh->elf.root.type == bfd_link_hash_defweak)
6410 && (eh->elf.ref_dynamic
6411 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6412 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6413 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6414 && (!bfd_link_executable (info)
6415 || info->export_dynamic
6416 || (eh->elf.dynamic
6417 && d != NULL
6418 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6419 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6420 || !bfd_hide_sym_by_version (info->version_info,
6421 eh->elf.root.root.string)))))
6422 {
6423 asection *code_sec;
6424 struct ppc_link_hash_entry *fh;
6425
6426 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6427
6428 /* Function descriptor syms cause the associated
6429 function code sym section to be marked. */
6430 fh = defined_code_entry (eh);
6431 if (fh != NULL)
6432 {
6433 code_sec = fh->elf.root.u.def.section;
6434 code_sec->flags |= SEC_KEEP;
6435 }
6436 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6437 && opd_entry_value (eh->elf.root.u.def.section,
6438 eh->elf.root.u.def.value,
6439 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6440 code_sec->flags |= SEC_KEEP;
6441 }
6442
6443 return TRUE;
6444 }
6445
6446 /* Return the section that should be marked against GC for a given
6447 relocation. */
6448
6449 static asection *
6450 ppc64_elf_gc_mark_hook (asection *sec,
6451 struct bfd_link_info *info,
6452 Elf_Internal_Rela *rel,
6453 struct elf_link_hash_entry *h,
6454 Elf_Internal_Sym *sym)
6455 {
6456 asection *rsec;
6457
6458 /* Syms return NULL if we're marking .opd, so we avoid marking all
6459 function sections, as all functions are referenced in .opd. */
6460 rsec = NULL;
6461 if (get_opd_info (sec) != NULL)
6462 return rsec;
6463
6464 if (h != NULL)
6465 {
6466 enum elf_ppc64_reloc_type r_type;
6467 struct ppc_link_hash_entry *eh, *fh, *fdh;
6468
6469 r_type = ELF64_R_TYPE (rel->r_info);
6470 switch (r_type)
6471 {
6472 case R_PPC64_GNU_VTINHERIT:
6473 case R_PPC64_GNU_VTENTRY:
6474 break;
6475
6476 default:
6477 switch (h->root.type)
6478 {
6479 case bfd_link_hash_defined:
6480 case bfd_link_hash_defweak:
6481 eh = (struct ppc_link_hash_entry *) h;
6482 fdh = defined_func_desc (eh);
6483 if (fdh != NULL)
6484 eh = fdh;
6485
6486 /* Function descriptor syms cause the associated
6487 function code sym section to be marked. */
6488 fh = defined_code_entry (eh);
6489 if (fh != NULL)
6490 {
6491 /* They also mark their opd section. */
6492 eh->elf.root.u.def.section->gc_mark = 1;
6493
6494 rsec = fh->elf.root.u.def.section;
6495 }
6496 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6497 && opd_entry_value (eh->elf.root.u.def.section,
6498 eh->elf.root.u.def.value,
6499 &rsec, NULL, FALSE) != (bfd_vma) -1)
6500 eh->elf.root.u.def.section->gc_mark = 1;
6501 else
6502 rsec = h->root.u.def.section;
6503 break;
6504
6505 case bfd_link_hash_common:
6506 rsec = h->root.u.c.p->section;
6507 break;
6508
6509 default:
6510 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6511 }
6512 }
6513 }
6514 else
6515 {
6516 struct _opd_sec_data *opd;
6517
6518 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6519 opd = get_opd_info (rsec);
6520 if (opd != NULL && opd->func_sec != NULL)
6521 {
6522 rsec->gc_mark = 1;
6523
6524 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6525 }
6526 }
6527
6528 return rsec;
6529 }
6530
6531 /* Update the .got, .plt. and dynamic reloc reference counts for the
6532 section being removed. */
6533
6534 static bfd_boolean
6535 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6536 asection *sec, const Elf_Internal_Rela *relocs)
6537 {
6538 struct ppc_link_hash_table *htab;
6539 Elf_Internal_Shdr *symtab_hdr;
6540 struct elf_link_hash_entry **sym_hashes;
6541 struct got_entry **local_got_ents;
6542 const Elf_Internal_Rela *rel, *relend;
6543
6544 if (bfd_link_relocatable (info))
6545 return TRUE;
6546
6547 if ((sec->flags & SEC_ALLOC) == 0)
6548 return TRUE;
6549
6550 elf_section_data (sec)->local_dynrel = NULL;
6551
6552 htab = ppc_hash_table (info);
6553 if (htab == NULL)
6554 return FALSE;
6555
6556 symtab_hdr = &elf_symtab_hdr (abfd);
6557 sym_hashes = elf_sym_hashes (abfd);
6558 local_got_ents = elf_local_got_ents (abfd);
6559
6560 relend = relocs + sec->reloc_count;
6561 for (rel = relocs; rel < relend; rel++)
6562 {
6563 unsigned long r_symndx;
6564 enum elf_ppc64_reloc_type r_type;
6565 struct elf_link_hash_entry *h = NULL;
6566 struct plt_entry **plt_list;
6567 unsigned char tls_type = 0;
6568
6569 r_symndx = ELF64_R_SYM (rel->r_info);
6570 r_type = ELF64_R_TYPE (rel->r_info);
6571 if (r_symndx >= symtab_hdr->sh_info)
6572 {
6573 struct ppc_link_hash_entry *eh;
6574 struct elf_dyn_relocs **pp;
6575 struct elf_dyn_relocs *p;
6576
6577 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6578 h = elf_follow_link (h);
6579 eh = (struct ppc_link_hash_entry *) h;
6580
6581 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6582 if (p->sec == sec)
6583 {
6584 /* Everything must go for SEC. */
6585 *pp = p->next;
6586 break;
6587 }
6588 }
6589
6590 switch (r_type)
6591 {
6592 case R_PPC64_GOT_TLSLD16:
6593 case R_PPC64_GOT_TLSLD16_LO:
6594 case R_PPC64_GOT_TLSLD16_HI:
6595 case R_PPC64_GOT_TLSLD16_HA:
6596 tls_type = TLS_TLS | TLS_LD;
6597 goto dogot;
6598
6599 case R_PPC64_GOT_TLSGD16:
6600 case R_PPC64_GOT_TLSGD16_LO:
6601 case R_PPC64_GOT_TLSGD16_HI:
6602 case R_PPC64_GOT_TLSGD16_HA:
6603 tls_type = TLS_TLS | TLS_GD;
6604 goto dogot;
6605
6606 case R_PPC64_GOT_TPREL16_DS:
6607 case R_PPC64_GOT_TPREL16_LO_DS:
6608 case R_PPC64_GOT_TPREL16_HI:
6609 case R_PPC64_GOT_TPREL16_HA:
6610 tls_type = TLS_TLS | TLS_TPREL;
6611 goto dogot;
6612
6613 case R_PPC64_GOT_DTPREL16_DS:
6614 case R_PPC64_GOT_DTPREL16_LO_DS:
6615 case R_PPC64_GOT_DTPREL16_HI:
6616 case R_PPC64_GOT_DTPREL16_HA:
6617 tls_type = TLS_TLS | TLS_DTPREL;
6618 goto dogot;
6619
6620 case R_PPC64_GOT16:
6621 case R_PPC64_GOT16_DS:
6622 case R_PPC64_GOT16_HA:
6623 case R_PPC64_GOT16_HI:
6624 case R_PPC64_GOT16_LO:
6625 case R_PPC64_GOT16_LO_DS:
6626 dogot:
6627 {
6628 struct got_entry *ent;
6629
6630 if (h != NULL)
6631 ent = h->got.glist;
6632 else
6633 ent = local_got_ents[r_symndx];
6634
6635 for (; ent != NULL; ent = ent->next)
6636 if (ent->addend == rel->r_addend
6637 && ent->owner == abfd
6638 && ent->tls_type == tls_type)
6639 break;
6640 if (ent == NULL)
6641 abort ();
6642 if (ent->got.refcount > 0)
6643 ent->got.refcount -= 1;
6644 }
6645 break;
6646
6647 case R_PPC64_PLT16_HA:
6648 case R_PPC64_PLT16_HI:
6649 case R_PPC64_PLT16_LO:
6650 case R_PPC64_PLT32:
6651 case R_PPC64_PLT64:
6652 case R_PPC64_REL14:
6653 case R_PPC64_REL14_BRNTAKEN:
6654 case R_PPC64_REL14_BRTAKEN:
6655 case R_PPC64_REL24:
6656 plt_list = NULL;
6657 if (h != NULL)
6658 plt_list = &h->plt.plist;
6659 else if (local_got_ents != NULL)
6660 {
6661 struct plt_entry **local_plt = (struct plt_entry **)
6662 (local_got_ents + symtab_hdr->sh_info);
6663 unsigned char *local_got_tls_masks = (unsigned char *)
6664 (local_plt + symtab_hdr->sh_info);
6665 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6666 plt_list = local_plt + r_symndx;
6667 }
6668 if (plt_list)
6669 {
6670 struct plt_entry *ent;
6671
6672 for (ent = *plt_list; ent != NULL; ent = ent->next)
6673 if (ent->addend == rel->r_addend)
6674 break;
6675 if (ent != NULL && ent->plt.refcount > 0)
6676 ent->plt.refcount -= 1;
6677 }
6678 break;
6679
6680 default:
6681 break;
6682 }
6683 }
6684 return TRUE;
6685 }
6686
6687 /* The maximum size of .sfpr. */
6688 #define SFPR_MAX (218*4)
6689
6690 struct sfpr_def_parms
6691 {
6692 const char name[12];
6693 unsigned char lo, hi;
6694 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6695 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6696 };
6697
6698 /* Auto-generate _save*, _rest* functions in .sfpr.
6699 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6700 instead. */
6701
6702 static bfd_boolean
6703 sfpr_define (struct bfd_link_info *info,
6704 const struct sfpr_def_parms *parm,
6705 asection *stub_sec)
6706 {
6707 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6708 unsigned int i;
6709 size_t len = strlen (parm->name);
6710 bfd_boolean writing = FALSE;
6711 char sym[16];
6712
6713 if (htab == NULL)
6714 return FALSE;
6715
6716 memcpy (sym, parm->name, len);
6717 sym[len + 2] = 0;
6718
6719 for (i = parm->lo; i <= parm->hi; i++)
6720 {
6721 struct ppc_link_hash_entry *h;
6722
6723 sym[len + 0] = i / 10 + '0';
6724 sym[len + 1] = i % 10 + '0';
6725 h = (struct ppc_link_hash_entry *)
6726 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6727 if (stub_sec != NULL)
6728 {
6729 if (h != NULL
6730 && h->elf.root.type == bfd_link_hash_defined
6731 && h->elf.root.u.def.section == htab->sfpr)
6732 {
6733 struct elf_link_hash_entry *s;
6734 char buf[32];
6735 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6736 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6737 if (s == NULL)
6738 return FALSE;
6739 if (s->root.type == bfd_link_hash_new
6740 || (s->root.type = bfd_link_hash_defined
6741 && s->root.u.def.section == stub_sec))
6742 {
6743 s->root.type = bfd_link_hash_defined;
6744 s->root.u.def.section = stub_sec;
6745 s->root.u.def.value = (stub_sec->size
6746 + h->elf.root.u.def.value);
6747 s->ref_regular = 1;
6748 s->def_regular = 1;
6749 s->ref_regular_nonweak = 1;
6750 s->forced_local = 1;
6751 s->non_elf = 0;
6752 s->root.linker_def = 1;
6753 }
6754 }
6755 continue;
6756 }
6757 if (h != NULL)
6758 {
6759 h->save_res = 1;
6760 if (!h->elf.def_regular)
6761 {
6762 h->elf.root.type = bfd_link_hash_defined;
6763 h->elf.root.u.def.section = htab->sfpr;
6764 h->elf.root.u.def.value = htab->sfpr->size;
6765 h->elf.type = STT_FUNC;
6766 h->elf.def_regular = 1;
6767 h->elf.non_elf = 0;
6768 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6769 writing = TRUE;
6770 if (htab->sfpr->contents == NULL)
6771 {
6772 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6773 if (htab->sfpr->contents == NULL)
6774 return FALSE;
6775 }
6776 }
6777 }
6778 if (writing)
6779 {
6780 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6781 if (i != parm->hi)
6782 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6783 else
6784 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6785 htab->sfpr->size = p - htab->sfpr->contents;
6786 }
6787 }
6788
6789 return TRUE;
6790 }
6791
6792 static bfd_byte *
6793 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6794 {
6795 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6796 return p + 4;
6797 }
6798
6799 static bfd_byte *
6800 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6801 {
6802 p = savegpr0 (abfd, p, r);
6803 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6804 p = p + 4;
6805 bfd_put_32 (abfd, BLR, p);
6806 return p + 4;
6807 }
6808
6809 static bfd_byte *
6810 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6811 {
6812 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6813 return p + 4;
6814 }
6815
6816 static bfd_byte *
6817 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6818 {
6819 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6820 p = p + 4;
6821 p = restgpr0 (abfd, p, r);
6822 bfd_put_32 (abfd, MTLR_R0, p);
6823 p = p + 4;
6824 if (r == 29)
6825 {
6826 p = restgpr0 (abfd, p, 30);
6827 p = restgpr0 (abfd, p, 31);
6828 }
6829 bfd_put_32 (abfd, BLR, p);
6830 return p + 4;
6831 }
6832
6833 static bfd_byte *
6834 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6835 {
6836 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6837 return p + 4;
6838 }
6839
6840 static bfd_byte *
6841 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6842 {
6843 p = savegpr1 (abfd, p, r);
6844 bfd_put_32 (abfd, BLR, p);
6845 return p + 4;
6846 }
6847
6848 static bfd_byte *
6849 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6850 {
6851 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6852 return p + 4;
6853 }
6854
6855 static bfd_byte *
6856 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6857 {
6858 p = restgpr1 (abfd, p, r);
6859 bfd_put_32 (abfd, BLR, p);
6860 return p + 4;
6861 }
6862
6863 static bfd_byte *
6864 savefpr (bfd *abfd, bfd_byte *p, int r)
6865 {
6866 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6867 return p + 4;
6868 }
6869
6870 static bfd_byte *
6871 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6872 {
6873 p = savefpr (abfd, p, r);
6874 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6875 p = p + 4;
6876 bfd_put_32 (abfd, BLR, p);
6877 return p + 4;
6878 }
6879
6880 static bfd_byte *
6881 restfpr (bfd *abfd, bfd_byte *p, int r)
6882 {
6883 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6884 return p + 4;
6885 }
6886
6887 static bfd_byte *
6888 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6889 {
6890 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6891 p = p + 4;
6892 p = restfpr (abfd, p, r);
6893 bfd_put_32 (abfd, MTLR_R0, p);
6894 p = p + 4;
6895 if (r == 29)
6896 {
6897 p = restfpr (abfd, p, 30);
6898 p = restfpr (abfd, p, 31);
6899 }
6900 bfd_put_32 (abfd, BLR, p);
6901 return p + 4;
6902 }
6903
6904 static bfd_byte *
6905 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6906 {
6907 p = savefpr (abfd, p, r);
6908 bfd_put_32 (abfd, BLR, p);
6909 return p + 4;
6910 }
6911
6912 static bfd_byte *
6913 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6914 {
6915 p = restfpr (abfd, p, r);
6916 bfd_put_32 (abfd, BLR, p);
6917 return p + 4;
6918 }
6919
6920 static bfd_byte *
6921 savevr (bfd *abfd, bfd_byte *p, int r)
6922 {
6923 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6924 p = p + 4;
6925 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6926 return p + 4;
6927 }
6928
6929 static bfd_byte *
6930 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6931 {
6932 p = savevr (abfd, p, r);
6933 bfd_put_32 (abfd, BLR, p);
6934 return p + 4;
6935 }
6936
6937 static bfd_byte *
6938 restvr (bfd *abfd, bfd_byte *p, int r)
6939 {
6940 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6941 p = p + 4;
6942 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6943 return p + 4;
6944 }
6945
6946 static bfd_byte *
6947 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6948 {
6949 p = restvr (abfd, p, r);
6950 bfd_put_32 (abfd, BLR, p);
6951 return p + 4;
6952 }
6953
6954 /* Called via elf_link_hash_traverse to transfer dynamic linking
6955 information on function code symbol entries to their corresponding
6956 function descriptor symbol entries. */
6957
6958 static bfd_boolean
6959 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6960 {
6961 struct bfd_link_info *info;
6962 struct ppc_link_hash_table *htab;
6963 struct plt_entry *ent;
6964 struct ppc_link_hash_entry *fh;
6965 struct ppc_link_hash_entry *fdh;
6966 bfd_boolean force_local;
6967
6968 fh = (struct ppc_link_hash_entry *) h;
6969 if (fh->elf.root.type == bfd_link_hash_indirect)
6970 return TRUE;
6971
6972 info = inf;
6973 htab = ppc_hash_table (info);
6974 if (htab == NULL)
6975 return FALSE;
6976
6977 /* Resolve undefined references to dot-symbols as the value
6978 in the function descriptor, if we have one in a regular object.
6979 This is to satisfy cases like ".quad .foo". Calls to functions
6980 in dynamic objects are handled elsewhere. */
6981 if (fh->elf.root.type == bfd_link_hash_undefweak
6982 && fh->was_undefined
6983 && (fdh = defined_func_desc (fh)) != NULL
6984 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6985 && opd_entry_value (fdh->elf.root.u.def.section,
6986 fdh->elf.root.u.def.value,
6987 &fh->elf.root.u.def.section,
6988 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6989 {
6990 fh->elf.root.type = fdh->elf.root.type;
6991 fh->elf.forced_local = 1;
6992 fh->elf.def_regular = fdh->elf.def_regular;
6993 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6994 }
6995
6996 /* If this is a function code symbol, transfer dynamic linking
6997 information to the function descriptor symbol. */
6998 if (!fh->is_func)
6999 return TRUE;
7000
7001 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7002 if (ent->plt.refcount > 0)
7003 break;
7004 if (ent == NULL
7005 || fh->elf.root.root.string[0] != '.'
7006 || fh->elf.root.root.string[1] == '\0')
7007 return TRUE;
7008
7009 /* Find the corresponding function descriptor symbol. Create it
7010 as undefined if necessary. */
7011
7012 fdh = lookup_fdh (fh, htab);
7013 if (fdh == NULL
7014 && !bfd_link_executable (info)
7015 && (fh->elf.root.type == bfd_link_hash_undefined
7016 || fh->elf.root.type == bfd_link_hash_undefweak))
7017 {
7018 fdh = make_fdh (info, fh);
7019 if (fdh == NULL)
7020 return FALSE;
7021 }
7022
7023 /* Fake function descriptors are made undefweak. If the function
7024 code symbol is strong undefined, make the fake sym the same.
7025 If the function code symbol is defined, then force the fake
7026 descriptor local; We can't support overriding of symbols in a
7027 shared library on a fake descriptor. */
7028
7029 if (fdh != NULL
7030 && fdh->fake
7031 && fdh->elf.root.type == bfd_link_hash_undefweak)
7032 {
7033 if (fh->elf.root.type == bfd_link_hash_undefined)
7034 {
7035 fdh->elf.root.type = bfd_link_hash_undefined;
7036 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
7037 }
7038 else if (fh->elf.root.type == bfd_link_hash_defined
7039 || fh->elf.root.type == bfd_link_hash_defweak)
7040 {
7041 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7042 }
7043 }
7044
7045 if (fdh != NULL
7046 && !fdh->elf.forced_local
7047 && (!bfd_link_executable (info)
7048 || fdh->elf.def_dynamic
7049 || fdh->elf.ref_dynamic
7050 || (fdh->elf.root.type == bfd_link_hash_undefweak
7051 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
7052 {
7053 if (fdh->elf.dynindx == -1)
7054 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7055 return FALSE;
7056 fdh->elf.ref_regular |= fh->elf.ref_regular;
7057 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7058 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7059 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7060 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
7061 {
7062 move_plt_plist (fh, fdh);
7063 fdh->elf.needs_plt = 1;
7064 }
7065 fdh->is_func_descriptor = 1;
7066 fdh->oh = fh;
7067 fh->oh = fdh;
7068 }
7069
7070 /* Now that the info is on the function descriptor, clear the
7071 function code sym info. Any function code syms for which we
7072 don't have a definition in a regular file, we force local.
7073 This prevents a shared library from exporting syms that have
7074 been imported from another library. Function code syms that
7075 are really in the library we must leave global to prevent the
7076 linker dragging in a definition from a static library. */
7077 force_local = (!fh->elf.def_regular
7078 || fdh == NULL
7079 || !fdh->elf.def_regular
7080 || fdh->elf.forced_local);
7081 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7082
7083 return TRUE;
7084 }
7085
7086 static const struct sfpr_def_parms save_res_funcs[] =
7087 {
7088 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7089 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7090 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7091 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7092 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7093 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7094 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7095 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7096 { "._savef", 14, 31, savefpr, savefpr1_tail },
7097 { "._restf", 14, 31, restfpr, restfpr1_tail },
7098 { "_savevr_", 20, 31, savevr, savevr_tail },
7099 { "_restvr_", 20, 31, restvr, restvr_tail }
7100 };
7101
7102 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7103 this hook to a) provide some gcc support functions, and b) transfer
7104 dynamic linking information gathered so far on function code symbol
7105 entries, to their corresponding function descriptor symbol entries. */
7106
7107 static bfd_boolean
7108 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7109 struct bfd_link_info *info)
7110 {
7111 struct ppc_link_hash_table *htab;
7112
7113 htab = ppc_hash_table (info);
7114 if (htab == NULL)
7115 return FALSE;
7116
7117 /* Provide any missing _save* and _rest* functions. */
7118 if (htab->sfpr != NULL)
7119 {
7120 unsigned int i;
7121
7122 htab->sfpr->size = 0;
7123 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7124 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7125 return FALSE;
7126 if (htab->sfpr->size == 0)
7127 htab->sfpr->flags |= SEC_EXCLUDE;
7128 }
7129
7130 if (bfd_link_relocatable (info))
7131 return TRUE;
7132
7133 if (htab->elf.hgot != NULL)
7134 {
7135 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7136 /* Make .TOC. defined so as to prevent it being made dynamic.
7137 The wrong value here is fixed later in ppc64_elf_set_toc. */
7138 if (!htab->elf.hgot->def_regular
7139 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7140 {
7141 htab->elf.hgot->root.type = bfd_link_hash_defined;
7142 htab->elf.hgot->root.u.def.value = 0;
7143 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7144 htab->elf.hgot->def_regular = 1;
7145 htab->elf.hgot->root.linker_def = 1;
7146 }
7147 htab->elf.hgot->type = STT_OBJECT;
7148 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7149 | STV_HIDDEN);
7150 }
7151
7152 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7153
7154 return TRUE;
7155 }
7156
7157 /* Return true if we have dynamic relocs against H that apply to
7158 read-only sections. */
7159
7160 static bfd_boolean
7161 readonly_dynrelocs (struct elf_link_hash_entry *h)
7162 {
7163 struct ppc_link_hash_entry *eh;
7164 struct elf_dyn_relocs *p;
7165
7166 eh = (struct ppc_link_hash_entry *) h;
7167 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7168 {
7169 asection *s = p->sec->output_section;
7170
7171 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7172 return TRUE;
7173 }
7174 return FALSE;
7175 }
7176
7177 /* Return true if we have dynamic relocs against H or any of its weak
7178 aliases, that apply to read-only sections. */
7179
7180 static bfd_boolean
7181 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7182 {
7183 struct ppc_link_hash_entry *eh;
7184
7185 eh = (struct ppc_link_hash_entry *) h;
7186 do
7187 {
7188 if (readonly_dynrelocs (&eh->elf))
7189 return TRUE;
7190 eh = eh->weakref;
7191 } while (eh != NULL && &eh->elf != h);
7192
7193 return FALSE;
7194 }
7195
7196 /* Return whether EH has pc-relative dynamic relocs. */
7197
7198 static bfd_boolean
7199 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7200 {
7201 struct elf_dyn_relocs *p;
7202
7203 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7204 if (p->pc_count != 0)
7205 return TRUE;
7206 return FALSE;
7207 }
7208
7209 /* Return true if a global entry stub will be created for H. Valid
7210 for ELFv2 before plt entries have been allocated. */
7211
7212 static bfd_boolean
7213 global_entry_stub (struct elf_link_hash_entry *h)
7214 {
7215 struct plt_entry *pent;
7216
7217 if (!h->pointer_equality_needed
7218 || h->def_regular)
7219 return FALSE;
7220
7221 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7222 if (pent->plt.refcount > 0
7223 && pent->addend == 0)
7224 return TRUE;
7225
7226 return FALSE;
7227 }
7228
7229 /* Adjust a symbol defined by a dynamic object and referenced by a
7230 regular object. The current definition is in some section of the
7231 dynamic object, but we're not including those sections. We have to
7232 change the definition to something the rest of the link can
7233 understand. */
7234
7235 static bfd_boolean
7236 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7237 struct elf_link_hash_entry *h)
7238 {
7239 struct ppc_link_hash_table *htab;
7240 asection *s;
7241
7242 htab = ppc_hash_table (info);
7243 if (htab == NULL)
7244 return FALSE;
7245
7246 /* Deal with function syms. */
7247 if (h->type == STT_FUNC
7248 || h->type == STT_GNU_IFUNC
7249 || h->needs_plt)
7250 {
7251 /* Clear procedure linkage table information for any symbol that
7252 won't need a .plt entry. */
7253 struct plt_entry *ent;
7254 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7255 if (ent->plt.refcount > 0)
7256 break;
7257 if (ent == NULL
7258 || (h->type != STT_GNU_IFUNC
7259 && (SYMBOL_CALLS_LOCAL (info, h)
7260 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7261 && h->root.type == bfd_link_hash_undefweak)))
7262 || ((struct ppc_link_hash_entry *) h)->save_res)
7263 {
7264 h->plt.plist = NULL;
7265 h->needs_plt = 0;
7266 h->pointer_equality_needed = 0;
7267 }
7268 else if (abiversion (info->output_bfd) >= 2)
7269 {
7270 /* Taking a function's address in a read/write section
7271 doesn't require us to define the function symbol in the
7272 executable on a global entry stub. A dynamic reloc can
7273 be used instead. The reason we prefer a few more dynamic
7274 relocs is that calling via a global entry stub costs a
7275 few more instructions, and pointer_equality_needed causes
7276 extra work in ld.so when resolving these symbols. */
7277 if (global_entry_stub (h)
7278 && !alias_readonly_dynrelocs (h))
7279 {
7280 h->pointer_equality_needed = 0;
7281 /* After adjust_dynamic_symbol, non_got_ref set in
7282 the non-pic case means that dyn_relocs for this
7283 symbol should be discarded. */
7284 h->non_got_ref = 0;
7285 }
7286
7287 /* If making a plt entry, then we don't need copy relocs. */
7288 return TRUE;
7289 }
7290 }
7291 else
7292 h->plt.plist = NULL;
7293
7294 /* If this is a weak symbol, and there is a real definition, the
7295 processor independent code will have arranged for us to see the
7296 real definition first, and we can just use the same value. */
7297 if (h->u.weakdef != NULL)
7298 {
7299 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7300 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7301 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7302 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7303 if (ELIMINATE_COPY_RELOCS)
7304 h->non_got_ref = h->u.weakdef->non_got_ref;
7305 return TRUE;
7306 }
7307
7308 /* If we are creating a shared library, we must presume that the
7309 only references to the symbol are via the global offset table.
7310 For such cases we need not do anything here; the relocations will
7311 be handled correctly by relocate_section. */
7312 if (bfd_link_pic (info))
7313 return TRUE;
7314
7315 /* If there are no references to this symbol that do not use the
7316 GOT, we don't need to generate a copy reloc. */
7317 if (!h->non_got_ref)
7318 return TRUE;
7319
7320 /* Don't generate a copy reloc for symbols defined in the executable. */
7321 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7322
7323 /* If -z nocopyreloc was given, don't generate them either. */
7324 || info->nocopyreloc
7325
7326 /* If we didn't find any dynamic relocs in read-only sections, then
7327 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7328 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7329
7330 /* Protected variables do not work with .dynbss. The copy in
7331 .dynbss won't be used by the shared library with the protected
7332 definition for the variable. Text relocations are preferable
7333 to an incorrect program. */
7334 || h->protected_def)
7335 {
7336 h->non_got_ref = 0;
7337 return TRUE;
7338 }
7339
7340 if (h->plt.plist != NULL)
7341 {
7342 /* We should never get here, but unfortunately there are versions
7343 of gcc out there that improperly (for this ABI) put initialized
7344 function pointers, vtable refs and suchlike in read-only
7345 sections. Allow them to proceed, but warn that this might
7346 break at runtime. */
7347 info->callbacks->einfo
7348 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7349 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7350 h->root.root.string);
7351 }
7352
7353 /* This is a reference to a symbol defined by a dynamic object which
7354 is not a function. */
7355
7356 /* We must allocate the symbol in our .dynbss section, which will
7357 become part of the .bss section of the executable. There will be
7358 an entry for this symbol in the .dynsym section. The dynamic
7359 object will contain position independent code, so all references
7360 from the dynamic object to this symbol will go through the global
7361 offset table. The dynamic linker will use the .dynsym entry to
7362 determine the address it must put in the global offset table, so
7363 both the dynamic object and the regular object will refer to the
7364 same memory location for the variable. */
7365
7366 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7367 to copy the initial value out of the dynamic object and into the
7368 runtime process image. We need to remember the offset into the
7369 .rela.bss section we are going to use. */
7370 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7371 {
7372 htab->relbss->size += sizeof (Elf64_External_Rela);
7373 h->needs_copy = 1;
7374 }
7375
7376 s = htab->dynbss;
7377
7378 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7379 }
7380
7381 /* If given a function descriptor symbol, hide both the function code
7382 sym and the descriptor. */
7383 static void
7384 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7385 struct elf_link_hash_entry *h,
7386 bfd_boolean force_local)
7387 {
7388 struct ppc_link_hash_entry *eh;
7389 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7390
7391 eh = (struct ppc_link_hash_entry *) h;
7392 if (eh->is_func_descriptor)
7393 {
7394 struct ppc_link_hash_entry *fh = eh->oh;
7395
7396 if (fh == NULL)
7397 {
7398 const char *p, *q;
7399 struct ppc_link_hash_table *htab;
7400 char save;
7401
7402 /* We aren't supposed to use alloca in BFD because on
7403 systems which do not have alloca the version in libiberty
7404 calls xmalloc, which might cause the program to crash
7405 when it runs out of memory. This function doesn't have a
7406 return status, so there's no way to gracefully return an
7407 error. So cheat. We know that string[-1] can be safely
7408 accessed; It's either a string in an ELF string table,
7409 or allocated in an objalloc structure. */
7410
7411 p = eh->elf.root.root.string - 1;
7412 save = *p;
7413 *(char *) p = '.';
7414 htab = ppc_hash_table (info);
7415 if (htab == NULL)
7416 return;
7417
7418 fh = (struct ppc_link_hash_entry *)
7419 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7420 *(char *) p = save;
7421
7422 /* Unfortunately, if it so happens that the string we were
7423 looking for was allocated immediately before this string,
7424 then we overwrote the string terminator. That's the only
7425 reason the lookup should fail. */
7426 if (fh == NULL)
7427 {
7428 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7429 while (q >= eh->elf.root.root.string && *q == *p)
7430 --q, --p;
7431 if (q < eh->elf.root.root.string && *p == '.')
7432 fh = (struct ppc_link_hash_entry *)
7433 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7434 }
7435 if (fh != NULL)
7436 {
7437 eh->oh = fh;
7438 fh->oh = eh;
7439 }
7440 }
7441 if (fh != NULL)
7442 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7443 }
7444 }
7445
7446 static bfd_boolean
7447 get_sym_h (struct elf_link_hash_entry **hp,
7448 Elf_Internal_Sym **symp,
7449 asection **symsecp,
7450 unsigned char **tls_maskp,
7451 Elf_Internal_Sym **locsymsp,
7452 unsigned long r_symndx,
7453 bfd *ibfd)
7454 {
7455 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7456
7457 if (r_symndx >= symtab_hdr->sh_info)
7458 {
7459 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7460 struct elf_link_hash_entry *h;
7461
7462 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7463 h = elf_follow_link (h);
7464
7465 if (hp != NULL)
7466 *hp = h;
7467
7468 if (symp != NULL)
7469 *symp = NULL;
7470
7471 if (symsecp != NULL)
7472 {
7473 asection *symsec = NULL;
7474 if (h->root.type == bfd_link_hash_defined
7475 || h->root.type == bfd_link_hash_defweak)
7476 symsec = h->root.u.def.section;
7477 *symsecp = symsec;
7478 }
7479
7480 if (tls_maskp != NULL)
7481 {
7482 struct ppc_link_hash_entry *eh;
7483
7484 eh = (struct ppc_link_hash_entry *) h;
7485 *tls_maskp = &eh->tls_mask;
7486 }
7487 }
7488 else
7489 {
7490 Elf_Internal_Sym *sym;
7491 Elf_Internal_Sym *locsyms = *locsymsp;
7492
7493 if (locsyms == NULL)
7494 {
7495 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7496 if (locsyms == NULL)
7497 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7498 symtab_hdr->sh_info,
7499 0, NULL, NULL, NULL);
7500 if (locsyms == NULL)
7501 return FALSE;
7502 *locsymsp = locsyms;
7503 }
7504 sym = locsyms + r_symndx;
7505
7506 if (hp != NULL)
7507 *hp = NULL;
7508
7509 if (symp != NULL)
7510 *symp = sym;
7511
7512 if (symsecp != NULL)
7513 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7514
7515 if (tls_maskp != NULL)
7516 {
7517 struct got_entry **lgot_ents;
7518 unsigned char *tls_mask;
7519
7520 tls_mask = NULL;
7521 lgot_ents = elf_local_got_ents (ibfd);
7522 if (lgot_ents != NULL)
7523 {
7524 struct plt_entry **local_plt = (struct plt_entry **)
7525 (lgot_ents + symtab_hdr->sh_info);
7526 unsigned char *lgot_masks = (unsigned char *)
7527 (local_plt + symtab_hdr->sh_info);
7528 tls_mask = &lgot_masks[r_symndx];
7529 }
7530 *tls_maskp = tls_mask;
7531 }
7532 }
7533 return TRUE;
7534 }
7535
7536 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7537 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7538 type suitable for optimization, and 1 otherwise. */
7539
7540 static int
7541 get_tls_mask (unsigned char **tls_maskp,
7542 unsigned long *toc_symndx,
7543 bfd_vma *toc_addend,
7544 Elf_Internal_Sym **locsymsp,
7545 const Elf_Internal_Rela *rel,
7546 bfd *ibfd)
7547 {
7548 unsigned long r_symndx;
7549 int next_r;
7550 struct elf_link_hash_entry *h;
7551 Elf_Internal_Sym *sym;
7552 asection *sec;
7553 bfd_vma off;
7554
7555 r_symndx = ELF64_R_SYM (rel->r_info);
7556 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7557 return 0;
7558
7559 if ((*tls_maskp != NULL && **tls_maskp != 0)
7560 || sec == NULL
7561 || ppc64_elf_section_data (sec) == NULL
7562 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7563 return 1;
7564
7565 /* Look inside a TOC section too. */
7566 if (h != NULL)
7567 {
7568 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7569 off = h->root.u.def.value;
7570 }
7571 else
7572 off = sym->st_value;
7573 off += rel->r_addend;
7574 BFD_ASSERT (off % 8 == 0);
7575 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7576 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7577 if (toc_symndx != NULL)
7578 *toc_symndx = r_symndx;
7579 if (toc_addend != NULL)
7580 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7581 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7582 return 0;
7583 if ((h == NULL || is_static_defined (h))
7584 && (next_r == -1 || next_r == -2))
7585 return 1 - next_r;
7586 return 1;
7587 }
7588
7589 /* Find (or create) an entry in the tocsave hash table. */
7590
7591 static struct tocsave_entry *
7592 tocsave_find (struct ppc_link_hash_table *htab,
7593 enum insert_option insert,
7594 Elf_Internal_Sym **local_syms,
7595 const Elf_Internal_Rela *irela,
7596 bfd *ibfd)
7597 {
7598 unsigned long r_indx;
7599 struct elf_link_hash_entry *h;
7600 Elf_Internal_Sym *sym;
7601 struct tocsave_entry ent, *p;
7602 hashval_t hash;
7603 struct tocsave_entry **slot;
7604
7605 r_indx = ELF64_R_SYM (irela->r_info);
7606 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7607 return NULL;
7608 if (ent.sec == NULL || ent.sec->output_section == NULL)
7609 {
7610 _bfd_error_handler
7611 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7612 return NULL;
7613 }
7614
7615 if (h != NULL)
7616 ent.offset = h->root.u.def.value;
7617 else
7618 ent.offset = sym->st_value;
7619 ent.offset += irela->r_addend;
7620
7621 hash = tocsave_htab_hash (&ent);
7622 slot = ((struct tocsave_entry **)
7623 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7624 if (slot == NULL)
7625 return NULL;
7626
7627 if (*slot == NULL)
7628 {
7629 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7630 if (p == NULL)
7631 return NULL;
7632 *p = ent;
7633 *slot = p;
7634 }
7635 return *slot;
7636 }
7637
7638 /* Adjust all global syms defined in opd sections. In gcc generated
7639 code for the old ABI, these will already have been done. */
7640
7641 static bfd_boolean
7642 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7643 {
7644 struct ppc_link_hash_entry *eh;
7645 asection *sym_sec;
7646 struct _opd_sec_data *opd;
7647
7648 if (h->root.type == bfd_link_hash_indirect)
7649 return TRUE;
7650
7651 if (h->root.type != bfd_link_hash_defined
7652 && h->root.type != bfd_link_hash_defweak)
7653 return TRUE;
7654
7655 eh = (struct ppc_link_hash_entry *) h;
7656 if (eh->adjust_done)
7657 return TRUE;
7658
7659 sym_sec = eh->elf.root.u.def.section;
7660 opd = get_opd_info (sym_sec);
7661 if (opd != NULL && opd->adjust != NULL)
7662 {
7663 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7664 if (adjust == -1)
7665 {
7666 /* This entry has been deleted. */
7667 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7668 if (dsec == NULL)
7669 {
7670 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7671 if (discarded_section (dsec))
7672 {
7673 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7674 break;
7675 }
7676 }
7677 eh->elf.root.u.def.value = 0;
7678 eh->elf.root.u.def.section = dsec;
7679 }
7680 else
7681 eh->elf.root.u.def.value += adjust;
7682 eh->adjust_done = 1;
7683 }
7684 return TRUE;
7685 }
7686
7687 /* Handles decrementing dynamic reloc counts for the reloc specified by
7688 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7689 have already been determined. */
7690
7691 static bfd_boolean
7692 dec_dynrel_count (bfd_vma r_info,
7693 asection *sec,
7694 struct bfd_link_info *info,
7695 Elf_Internal_Sym **local_syms,
7696 struct elf_link_hash_entry *h,
7697 Elf_Internal_Sym *sym)
7698 {
7699 enum elf_ppc64_reloc_type r_type;
7700 asection *sym_sec = NULL;
7701
7702 /* Can this reloc be dynamic? This switch, and later tests here
7703 should be kept in sync with the code in check_relocs. */
7704 r_type = ELF64_R_TYPE (r_info);
7705 switch (r_type)
7706 {
7707 default:
7708 return TRUE;
7709
7710 case R_PPC64_TPREL16:
7711 case R_PPC64_TPREL16_LO:
7712 case R_PPC64_TPREL16_HI:
7713 case R_PPC64_TPREL16_HA:
7714 case R_PPC64_TPREL16_DS:
7715 case R_PPC64_TPREL16_LO_DS:
7716 case R_PPC64_TPREL16_HIGH:
7717 case R_PPC64_TPREL16_HIGHA:
7718 case R_PPC64_TPREL16_HIGHER:
7719 case R_PPC64_TPREL16_HIGHERA:
7720 case R_PPC64_TPREL16_HIGHEST:
7721 case R_PPC64_TPREL16_HIGHESTA:
7722 if (!bfd_link_pic (info))
7723 return TRUE;
7724
7725 case R_PPC64_TPREL64:
7726 case R_PPC64_DTPMOD64:
7727 case R_PPC64_DTPREL64:
7728 case R_PPC64_ADDR64:
7729 case R_PPC64_REL30:
7730 case R_PPC64_REL32:
7731 case R_PPC64_REL64:
7732 case R_PPC64_ADDR14:
7733 case R_PPC64_ADDR14_BRNTAKEN:
7734 case R_PPC64_ADDR14_BRTAKEN:
7735 case R_PPC64_ADDR16:
7736 case R_PPC64_ADDR16_DS:
7737 case R_PPC64_ADDR16_HA:
7738 case R_PPC64_ADDR16_HI:
7739 case R_PPC64_ADDR16_HIGH:
7740 case R_PPC64_ADDR16_HIGHA:
7741 case R_PPC64_ADDR16_HIGHER:
7742 case R_PPC64_ADDR16_HIGHERA:
7743 case R_PPC64_ADDR16_HIGHEST:
7744 case R_PPC64_ADDR16_HIGHESTA:
7745 case R_PPC64_ADDR16_LO:
7746 case R_PPC64_ADDR16_LO_DS:
7747 case R_PPC64_ADDR24:
7748 case R_PPC64_ADDR32:
7749 case R_PPC64_UADDR16:
7750 case R_PPC64_UADDR32:
7751 case R_PPC64_UADDR64:
7752 case R_PPC64_TOC:
7753 break;
7754 }
7755
7756 if (local_syms != NULL)
7757 {
7758 unsigned long r_symndx;
7759 bfd *ibfd = sec->owner;
7760
7761 r_symndx = ELF64_R_SYM (r_info);
7762 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7763 return FALSE;
7764 }
7765
7766 if ((bfd_link_pic (info)
7767 && (must_be_dyn_reloc (info, r_type)
7768 || (h != NULL
7769 && (!SYMBOLIC_BIND (info, h)
7770 || h->root.type == bfd_link_hash_defweak
7771 || !h->def_regular))))
7772 || (ELIMINATE_COPY_RELOCS
7773 && !bfd_link_pic (info)
7774 && h != NULL
7775 && (h->root.type == bfd_link_hash_defweak
7776 || !h->def_regular)))
7777 ;
7778 else
7779 return TRUE;
7780
7781 if (h != NULL)
7782 {
7783 struct elf_dyn_relocs *p;
7784 struct elf_dyn_relocs **pp;
7785 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7786
7787 /* elf_gc_sweep may have already removed all dyn relocs associated
7788 with local syms for a given section. Also, symbol flags are
7789 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7790 report a dynreloc miscount. */
7791 if (*pp == NULL && info->gc_sections)
7792 return TRUE;
7793
7794 while ((p = *pp) != NULL)
7795 {
7796 if (p->sec == sec)
7797 {
7798 if (!must_be_dyn_reloc (info, r_type))
7799 p->pc_count -= 1;
7800 p->count -= 1;
7801 if (p->count == 0)
7802 *pp = p->next;
7803 return TRUE;
7804 }
7805 pp = &p->next;
7806 }
7807 }
7808 else
7809 {
7810 struct ppc_dyn_relocs *p;
7811 struct ppc_dyn_relocs **pp;
7812 void *vpp;
7813 bfd_boolean is_ifunc;
7814
7815 if (local_syms == NULL)
7816 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7817 if (sym_sec == NULL)
7818 sym_sec = sec;
7819
7820 vpp = &elf_section_data (sym_sec)->local_dynrel;
7821 pp = (struct ppc_dyn_relocs **) vpp;
7822
7823 if (*pp == NULL && info->gc_sections)
7824 return TRUE;
7825
7826 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7827 while ((p = *pp) != NULL)
7828 {
7829 if (p->sec == sec && p->ifunc == is_ifunc)
7830 {
7831 p->count -= 1;
7832 if (p->count == 0)
7833 *pp = p->next;
7834 return TRUE;
7835 }
7836 pp = &p->next;
7837 }
7838 }
7839
7840 /* xgettext:c-format */
7841 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7842 sec->owner, sec);
7843 bfd_set_error (bfd_error_bad_value);
7844 return FALSE;
7845 }
7846
7847 /* Remove unused Official Procedure Descriptor entries. Currently we
7848 only remove those associated with functions in discarded link-once
7849 sections, or weakly defined functions that have been overridden. It
7850 would be possible to remove many more entries for statically linked
7851 applications. */
7852
7853 bfd_boolean
7854 ppc64_elf_edit_opd (struct bfd_link_info *info)
7855 {
7856 bfd *ibfd;
7857 bfd_boolean some_edited = FALSE;
7858 asection *need_pad = NULL;
7859 struct ppc_link_hash_table *htab;
7860
7861 htab = ppc_hash_table (info);
7862 if (htab == NULL)
7863 return FALSE;
7864
7865 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7866 {
7867 asection *sec;
7868 Elf_Internal_Rela *relstart, *rel, *relend;
7869 Elf_Internal_Shdr *symtab_hdr;
7870 Elf_Internal_Sym *local_syms;
7871 struct _opd_sec_data *opd;
7872 bfd_boolean need_edit, add_aux_fields, broken;
7873 bfd_size_type cnt_16b = 0;
7874
7875 if (!is_ppc64_elf (ibfd))
7876 continue;
7877
7878 sec = bfd_get_section_by_name (ibfd, ".opd");
7879 if (sec == NULL || sec->size == 0)
7880 continue;
7881
7882 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7883 continue;
7884
7885 if (sec->output_section == bfd_abs_section_ptr)
7886 continue;
7887
7888 /* Look through the section relocs. */
7889 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7890 continue;
7891
7892 local_syms = NULL;
7893 symtab_hdr = &elf_symtab_hdr (ibfd);
7894
7895 /* Read the relocations. */
7896 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7897 info->keep_memory);
7898 if (relstart == NULL)
7899 return FALSE;
7900
7901 /* First run through the relocs to check they are sane, and to
7902 determine whether we need to edit this opd section. */
7903 need_edit = FALSE;
7904 broken = FALSE;
7905 need_pad = sec;
7906 relend = relstart + sec->reloc_count;
7907 for (rel = relstart; rel < relend; )
7908 {
7909 enum elf_ppc64_reloc_type r_type;
7910 unsigned long r_symndx;
7911 asection *sym_sec;
7912 struct elf_link_hash_entry *h;
7913 Elf_Internal_Sym *sym;
7914 bfd_vma offset;
7915
7916 /* .opd contains an array of 16 or 24 byte entries. We're
7917 only interested in the reloc pointing to a function entry
7918 point. */
7919 offset = rel->r_offset;
7920 if (rel + 1 == relend
7921 || rel[1].r_offset != offset + 8)
7922 {
7923 /* If someone messes with .opd alignment then after a
7924 "ld -r" we might have padding in the middle of .opd.
7925 Also, there's nothing to prevent someone putting
7926 something silly in .opd with the assembler. No .opd
7927 optimization for them! */
7928 broken_opd:
7929 _bfd_error_handler
7930 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7931 broken = TRUE;
7932 break;
7933 }
7934
7935 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7936 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7937 {
7938 _bfd_error_handler
7939 /* xgettext:c-format */
7940 (_("%B: unexpected reloc type %u in .opd section"),
7941 ibfd, r_type);
7942 broken = TRUE;
7943 break;
7944 }
7945
7946 r_symndx = ELF64_R_SYM (rel->r_info);
7947 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7948 r_symndx, ibfd))
7949 goto error_ret;
7950
7951 if (sym_sec == NULL || sym_sec->owner == NULL)
7952 {
7953 const char *sym_name;
7954 if (h != NULL)
7955 sym_name = h->root.root.string;
7956 else
7957 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7958 sym_sec);
7959
7960 _bfd_error_handler
7961 /* xgettext:c-format */
7962 (_("%B: undefined sym `%s' in .opd section"),
7963 ibfd, sym_name);
7964 broken = TRUE;
7965 break;
7966 }
7967
7968 /* opd entries are always for functions defined in the
7969 current input bfd. If the symbol isn't defined in the
7970 input bfd, then we won't be using the function in this
7971 bfd; It must be defined in a linkonce section in another
7972 bfd, or is weak. It's also possible that we are
7973 discarding the function due to a linker script /DISCARD/,
7974 which we test for via the output_section. */
7975 if (sym_sec->owner != ibfd
7976 || sym_sec->output_section == bfd_abs_section_ptr)
7977 need_edit = TRUE;
7978
7979 rel += 2;
7980 if (rel + 1 == relend
7981 || (rel + 2 < relend
7982 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7983 ++rel;
7984
7985 if (rel == relend)
7986 {
7987 if (sec->size == offset + 24)
7988 {
7989 need_pad = NULL;
7990 break;
7991 }
7992 if (sec->size == offset + 16)
7993 {
7994 cnt_16b++;
7995 break;
7996 }
7997 goto broken_opd;
7998 }
7999 else if (rel + 1 < relend
8000 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8001 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8002 {
8003 if (rel[0].r_offset == offset + 16)
8004 cnt_16b++;
8005 else if (rel[0].r_offset != offset + 24)
8006 goto broken_opd;
8007 }
8008 else
8009 goto broken_opd;
8010 }
8011
8012 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8013
8014 if (!broken && (need_edit || add_aux_fields))
8015 {
8016 Elf_Internal_Rela *write_rel;
8017 Elf_Internal_Shdr *rel_hdr;
8018 bfd_byte *rptr, *wptr;
8019 bfd_byte *new_contents;
8020 bfd_size_type amt;
8021
8022 new_contents = NULL;
8023 amt = OPD_NDX (sec->size) * sizeof (long);
8024 opd = &ppc64_elf_section_data (sec)->u.opd;
8025 opd->adjust = bfd_zalloc (sec->owner, amt);
8026 if (opd->adjust == NULL)
8027 return FALSE;
8028 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8029
8030 /* This seems a waste of time as input .opd sections are all
8031 zeros as generated by gcc, but I suppose there's no reason
8032 this will always be so. We might start putting something in
8033 the third word of .opd entries. */
8034 if ((sec->flags & SEC_IN_MEMORY) == 0)
8035 {
8036 bfd_byte *loc;
8037 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8038 {
8039 if (loc != NULL)
8040 free (loc);
8041 error_ret:
8042 if (local_syms != NULL
8043 && symtab_hdr->contents != (unsigned char *) local_syms)
8044 free (local_syms);
8045 if (elf_section_data (sec)->relocs != relstart)
8046 free (relstart);
8047 return FALSE;
8048 }
8049 sec->contents = loc;
8050 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8051 }
8052
8053 elf_section_data (sec)->relocs = relstart;
8054
8055 new_contents = sec->contents;
8056 if (add_aux_fields)
8057 {
8058 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8059 if (new_contents == NULL)
8060 return FALSE;
8061 need_pad = NULL;
8062 }
8063 wptr = new_contents;
8064 rptr = sec->contents;
8065 write_rel = relstart;
8066 for (rel = relstart; rel < relend; )
8067 {
8068 unsigned long r_symndx;
8069 asection *sym_sec;
8070 struct elf_link_hash_entry *h;
8071 struct ppc_link_hash_entry *fdh = NULL;
8072 Elf_Internal_Sym *sym;
8073 long opd_ent_size;
8074 Elf_Internal_Rela *next_rel;
8075 bfd_boolean skip;
8076
8077 r_symndx = ELF64_R_SYM (rel->r_info);
8078 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8079 r_symndx, ibfd))
8080 goto error_ret;
8081
8082 next_rel = rel + 2;
8083 if (next_rel + 1 == relend
8084 || (next_rel + 2 < relend
8085 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8086 ++next_rel;
8087
8088 /* See if the .opd entry is full 24 byte or
8089 16 byte (with fd_aux entry overlapped with next
8090 fd_func). */
8091 opd_ent_size = 24;
8092 if (next_rel == relend)
8093 {
8094 if (sec->size == rel->r_offset + 16)
8095 opd_ent_size = 16;
8096 }
8097 else if (next_rel->r_offset == rel->r_offset + 16)
8098 opd_ent_size = 16;
8099
8100 if (h != NULL
8101 && h->root.root.string[0] == '.')
8102 {
8103 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
8104 if (fdh != NULL
8105 && fdh->elf.root.type != bfd_link_hash_defined
8106 && fdh->elf.root.type != bfd_link_hash_defweak)
8107 fdh = NULL;
8108 }
8109
8110 skip = (sym_sec->owner != ibfd
8111 || sym_sec->output_section == bfd_abs_section_ptr);
8112 if (skip)
8113 {
8114 if (fdh != NULL && sym_sec->owner == ibfd)
8115 {
8116 /* Arrange for the function descriptor sym
8117 to be dropped. */
8118 fdh->elf.root.u.def.value = 0;
8119 fdh->elf.root.u.def.section = sym_sec;
8120 }
8121 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8122
8123 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8124 rel = next_rel;
8125 else
8126 while (1)
8127 {
8128 if (!dec_dynrel_count (rel->r_info, sec, info,
8129 NULL, h, sym))
8130 goto error_ret;
8131
8132 if (++rel == next_rel)
8133 break;
8134
8135 r_symndx = ELF64_R_SYM (rel->r_info);
8136 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8137 r_symndx, ibfd))
8138 goto error_ret;
8139 }
8140 }
8141 else
8142 {
8143 /* We'll be keeping this opd entry. */
8144 long adjust;
8145
8146 if (fdh != NULL)
8147 {
8148 /* Redefine the function descriptor symbol to
8149 this location in the opd section. It is
8150 necessary to update the value here rather
8151 than using an array of adjustments as we do
8152 for local symbols, because various places
8153 in the generic ELF code use the value
8154 stored in u.def.value. */
8155 fdh->elf.root.u.def.value = wptr - new_contents;
8156 fdh->adjust_done = 1;
8157 }
8158
8159 /* Local syms are a bit tricky. We could
8160 tweak them as they can be cached, but
8161 we'd need to look through the local syms
8162 for the function descriptor sym which we
8163 don't have at the moment. So keep an
8164 array of adjustments. */
8165 adjust = (wptr - new_contents) - (rptr - sec->contents);
8166 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8167
8168 if (wptr != rptr)
8169 memcpy (wptr, rptr, opd_ent_size);
8170 wptr += opd_ent_size;
8171 if (add_aux_fields && opd_ent_size == 16)
8172 {
8173 memset (wptr, '\0', 8);
8174 wptr += 8;
8175 }
8176
8177 /* We need to adjust any reloc offsets to point to the
8178 new opd entries. */
8179 for ( ; rel != next_rel; ++rel)
8180 {
8181 rel->r_offset += adjust;
8182 if (write_rel != rel)
8183 memcpy (write_rel, rel, sizeof (*rel));
8184 ++write_rel;
8185 }
8186 }
8187
8188 rptr += opd_ent_size;
8189 }
8190
8191 sec->size = wptr - new_contents;
8192 sec->reloc_count = write_rel - relstart;
8193 if (add_aux_fields)
8194 {
8195 free (sec->contents);
8196 sec->contents = new_contents;
8197 }
8198
8199 /* Fudge the header size too, as this is used later in
8200 elf_bfd_final_link if we are emitting relocs. */
8201 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8202 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8203 some_edited = TRUE;
8204 }
8205 else if (elf_section_data (sec)->relocs != relstart)
8206 free (relstart);
8207
8208 if (local_syms != NULL
8209 && symtab_hdr->contents != (unsigned char *) local_syms)
8210 {
8211 if (!info->keep_memory)
8212 free (local_syms);
8213 else
8214 symtab_hdr->contents = (unsigned char *) local_syms;
8215 }
8216 }
8217
8218 if (some_edited)
8219 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8220
8221 /* If we are doing a final link and the last .opd entry is just 16 byte
8222 long, add a 8 byte padding after it. */
8223 if (need_pad != NULL && !bfd_link_relocatable (info))
8224 {
8225 bfd_byte *p;
8226
8227 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8228 {
8229 BFD_ASSERT (need_pad->size > 0);
8230
8231 p = bfd_malloc (need_pad->size + 8);
8232 if (p == NULL)
8233 return FALSE;
8234
8235 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8236 p, 0, need_pad->size))
8237 return FALSE;
8238
8239 need_pad->contents = p;
8240 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8241 }
8242 else
8243 {
8244 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8245 if (p == NULL)
8246 return FALSE;
8247
8248 need_pad->contents = p;
8249 }
8250
8251 memset (need_pad->contents + need_pad->size, 0, 8);
8252 need_pad->size += 8;
8253 }
8254
8255 return TRUE;
8256 }
8257
8258 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8259
8260 asection *
8261 ppc64_elf_tls_setup (struct bfd_link_info *info)
8262 {
8263 struct ppc_link_hash_table *htab;
8264
8265 htab = ppc_hash_table (info);
8266 if (htab == NULL)
8267 return NULL;
8268
8269 if (abiversion (info->output_bfd) == 1)
8270 htab->opd_abi = 1;
8271
8272 if (htab->params->no_multi_toc)
8273 htab->do_multi_toc = 0;
8274 else if (!htab->do_multi_toc)
8275 htab->params->no_multi_toc = 1;
8276
8277 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8278 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8279 FALSE, FALSE, TRUE));
8280 /* Move dynamic linking info to the function descriptor sym. */
8281 if (htab->tls_get_addr != NULL)
8282 func_desc_adjust (&htab->tls_get_addr->elf, info);
8283 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8284 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8285 FALSE, FALSE, TRUE));
8286 if (htab->params->tls_get_addr_opt)
8287 {
8288 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8289
8290 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8291 FALSE, FALSE, TRUE);
8292 if (opt != NULL)
8293 func_desc_adjust (opt, info);
8294 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8295 FALSE, FALSE, TRUE);
8296 if (opt_fd != NULL
8297 && (opt_fd->root.type == bfd_link_hash_defined
8298 || opt_fd->root.type == bfd_link_hash_defweak))
8299 {
8300 /* If glibc supports an optimized __tls_get_addr call stub,
8301 signalled by the presence of __tls_get_addr_opt, and we'll
8302 be calling __tls_get_addr via a plt call stub, then
8303 make __tls_get_addr point to __tls_get_addr_opt. */
8304 tga_fd = &htab->tls_get_addr_fd->elf;
8305 if (htab->elf.dynamic_sections_created
8306 && tga_fd != NULL
8307 && (tga_fd->type == STT_FUNC
8308 || tga_fd->needs_plt)
8309 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8310 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8311 && tga_fd->root.type == bfd_link_hash_undefweak)))
8312 {
8313 struct plt_entry *ent;
8314
8315 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8316 if (ent->plt.refcount > 0)
8317 break;
8318 if (ent != NULL)
8319 {
8320 tga_fd->root.type = bfd_link_hash_indirect;
8321 tga_fd->root.u.i.link = &opt_fd->root;
8322 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8323 opt_fd->forced_local = 0;
8324 if (opt_fd->dynindx != -1)
8325 {
8326 /* Use __tls_get_addr_opt in dynamic relocations. */
8327 opt_fd->dynindx = -1;
8328 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8329 opt_fd->dynstr_index);
8330 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8331 return NULL;
8332 }
8333 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8334 tga = &htab->tls_get_addr->elf;
8335 if (opt != NULL && tga != NULL)
8336 {
8337 tga->root.type = bfd_link_hash_indirect;
8338 tga->root.u.i.link = &opt->root;
8339 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8340 opt->forced_local = 0;
8341 _bfd_elf_link_hash_hide_symbol (info, opt,
8342 tga->forced_local);
8343 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8344 }
8345 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8346 htab->tls_get_addr_fd->is_func_descriptor = 1;
8347 if (htab->tls_get_addr != NULL)
8348 {
8349 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8350 htab->tls_get_addr->is_func = 1;
8351 }
8352 }
8353 }
8354 }
8355 else if (htab->params->tls_get_addr_opt < 0)
8356 htab->params->tls_get_addr_opt = 0;
8357 }
8358 return _bfd_elf_tls_setup (info->output_bfd, info);
8359 }
8360
8361 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8362 HASH1 or HASH2. */
8363
8364 static bfd_boolean
8365 branch_reloc_hash_match (const bfd *ibfd,
8366 const Elf_Internal_Rela *rel,
8367 const struct ppc_link_hash_entry *hash1,
8368 const struct ppc_link_hash_entry *hash2)
8369 {
8370 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8371 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8372 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8373
8374 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8375 {
8376 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8377 struct elf_link_hash_entry *h;
8378
8379 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8380 h = elf_follow_link (h);
8381 if (h == &hash1->elf || h == &hash2->elf)
8382 return TRUE;
8383 }
8384 return FALSE;
8385 }
8386
8387 /* Run through all the TLS relocs looking for optimization
8388 opportunities. The linker has been hacked (see ppc64elf.em) to do
8389 a preliminary section layout so that we know the TLS segment
8390 offsets. We can't optimize earlier because some optimizations need
8391 to know the tp offset, and we need to optimize before allocating
8392 dynamic relocations. */
8393
8394 bfd_boolean
8395 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8396 {
8397 bfd *ibfd;
8398 asection *sec;
8399 struct ppc_link_hash_table *htab;
8400 unsigned char *toc_ref;
8401 int pass;
8402
8403 if (!bfd_link_executable (info))
8404 return TRUE;
8405
8406 htab = ppc_hash_table (info);
8407 if (htab == NULL)
8408 return FALSE;
8409
8410 /* Make two passes over the relocs. On the first pass, mark toc
8411 entries involved with tls relocs, and check that tls relocs
8412 involved in setting up a tls_get_addr call are indeed followed by
8413 such a call. If they are not, we can't do any tls optimization.
8414 On the second pass twiddle tls_mask flags to notify
8415 relocate_section that optimization can be done, and adjust got
8416 and plt refcounts. */
8417 toc_ref = NULL;
8418 for (pass = 0; pass < 2; ++pass)
8419 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8420 {
8421 Elf_Internal_Sym *locsyms = NULL;
8422 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8423
8424 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8425 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8426 {
8427 Elf_Internal_Rela *relstart, *rel, *relend;
8428 bfd_boolean found_tls_get_addr_arg = 0;
8429
8430 /* Read the relocations. */
8431 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8432 info->keep_memory);
8433 if (relstart == NULL)
8434 {
8435 free (toc_ref);
8436 return FALSE;
8437 }
8438
8439 relend = relstart + sec->reloc_count;
8440 for (rel = relstart; rel < relend; rel++)
8441 {
8442 enum elf_ppc64_reloc_type r_type;
8443 unsigned long r_symndx;
8444 struct elf_link_hash_entry *h;
8445 Elf_Internal_Sym *sym;
8446 asection *sym_sec;
8447 unsigned char *tls_mask;
8448 unsigned char tls_set, tls_clear, tls_type = 0;
8449 bfd_vma value;
8450 bfd_boolean ok_tprel, is_local;
8451 long toc_ref_index = 0;
8452 int expecting_tls_get_addr = 0;
8453 bfd_boolean ret = FALSE;
8454
8455 r_symndx = ELF64_R_SYM (rel->r_info);
8456 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8457 r_symndx, ibfd))
8458 {
8459 err_free_rel:
8460 if (elf_section_data (sec)->relocs != relstart)
8461 free (relstart);
8462 if (toc_ref != NULL)
8463 free (toc_ref);
8464 if (locsyms != NULL
8465 && (elf_symtab_hdr (ibfd).contents
8466 != (unsigned char *) locsyms))
8467 free (locsyms);
8468 return ret;
8469 }
8470
8471 if (h != NULL)
8472 {
8473 if (h->root.type == bfd_link_hash_defined
8474 || h->root.type == bfd_link_hash_defweak)
8475 value = h->root.u.def.value;
8476 else if (h->root.type == bfd_link_hash_undefweak)
8477 value = 0;
8478 else
8479 {
8480 found_tls_get_addr_arg = 0;
8481 continue;
8482 }
8483 }
8484 else
8485 /* Symbols referenced by TLS relocs must be of type
8486 STT_TLS. So no need for .opd local sym adjust. */
8487 value = sym->st_value;
8488
8489 ok_tprel = FALSE;
8490 is_local = FALSE;
8491 if (h == NULL
8492 || !h->def_dynamic)
8493 {
8494 is_local = TRUE;
8495 if (h != NULL
8496 && h->root.type == bfd_link_hash_undefweak)
8497 ok_tprel = TRUE;
8498 else if (sym_sec != NULL
8499 && sym_sec->output_section != NULL)
8500 {
8501 value += sym_sec->output_offset;
8502 value += sym_sec->output_section->vma;
8503 value -= htab->elf.tls_sec->vma;
8504 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8505 < (bfd_vma) 1 << 32);
8506 }
8507 }
8508
8509 r_type = ELF64_R_TYPE (rel->r_info);
8510 /* If this section has old-style __tls_get_addr calls
8511 without marker relocs, then check that each
8512 __tls_get_addr call reloc is preceded by a reloc
8513 that conceivably belongs to the __tls_get_addr arg
8514 setup insn. If we don't find matching arg setup
8515 relocs, don't do any tls optimization. */
8516 if (pass == 0
8517 && sec->has_tls_get_addr_call
8518 && h != NULL
8519 && (h == &htab->tls_get_addr->elf
8520 || h == &htab->tls_get_addr_fd->elf)
8521 && !found_tls_get_addr_arg
8522 && is_branch_reloc (r_type))
8523 {
8524 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8525 "TLS optimization disabled\n"),
8526 ibfd, sec, rel->r_offset);
8527 ret = TRUE;
8528 goto err_free_rel;
8529 }
8530
8531 found_tls_get_addr_arg = 0;
8532 switch (r_type)
8533 {
8534 case R_PPC64_GOT_TLSLD16:
8535 case R_PPC64_GOT_TLSLD16_LO:
8536 expecting_tls_get_addr = 1;
8537 found_tls_get_addr_arg = 1;
8538 /* Fall through. */
8539
8540 case R_PPC64_GOT_TLSLD16_HI:
8541 case R_PPC64_GOT_TLSLD16_HA:
8542 /* These relocs should never be against a symbol
8543 defined in a shared lib. Leave them alone if
8544 that turns out to be the case. */
8545 if (!is_local)
8546 continue;
8547
8548 /* LD -> LE */
8549 tls_set = 0;
8550 tls_clear = TLS_LD;
8551 tls_type = TLS_TLS | TLS_LD;
8552 break;
8553
8554 case R_PPC64_GOT_TLSGD16:
8555 case R_PPC64_GOT_TLSGD16_LO:
8556 expecting_tls_get_addr = 1;
8557 found_tls_get_addr_arg = 1;
8558 /* Fall through. */
8559
8560 case R_PPC64_GOT_TLSGD16_HI:
8561 case R_PPC64_GOT_TLSGD16_HA:
8562 if (ok_tprel)
8563 /* GD -> LE */
8564 tls_set = 0;
8565 else
8566 /* GD -> IE */
8567 tls_set = TLS_TLS | TLS_TPRELGD;
8568 tls_clear = TLS_GD;
8569 tls_type = TLS_TLS | TLS_GD;
8570 break;
8571
8572 case R_PPC64_GOT_TPREL16_DS:
8573 case R_PPC64_GOT_TPREL16_LO_DS:
8574 case R_PPC64_GOT_TPREL16_HI:
8575 case R_PPC64_GOT_TPREL16_HA:
8576 if (ok_tprel)
8577 {
8578 /* IE -> LE */
8579 tls_set = 0;
8580 tls_clear = TLS_TPREL;
8581 tls_type = TLS_TLS | TLS_TPREL;
8582 break;
8583 }
8584 continue;
8585
8586 case R_PPC64_TLSGD:
8587 case R_PPC64_TLSLD:
8588 found_tls_get_addr_arg = 1;
8589 /* Fall through. */
8590
8591 case R_PPC64_TLS:
8592 case R_PPC64_TOC16:
8593 case R_PPC64_TOC16_LO:
8594 if (sym_sec == NULL || sym_sec != toc)
8595 continue;
8596
8597 /* Mark this toc entry as referenced by a TLS
8598 code sequence. We can do that now in the
8599 case of R_PPC64_TLS, and after checking for
8600 tls_get_addr for the TOC16 relocs. */
8601 if (toc_ref == NULL)
8602 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8603 if (toc_ref == NULL)
8604 goto err_free_rel;
8605
8606 if (h != NULL)
8607 value = h->root.u.def.value;
8608 else
8609 value = sym->st_value;
8610 value += rel->r_addend;
8611 if (value % 8 != 0)
8612 continue;
8613 BFD_ASSERT (value < toc->size
8614 && toc->output_offset % 8 == 0);
8615 toc_ref_index = (value + toc->output_offset) / 8;
8616 if (r_type == R_PPC64_TLS
8617 || r_type == R_PPC64_TLSGD
8618 || r_type == R_PPC64_TLSLD)
8619 {
8620 toc_ref[toc_ref_index] = 1;
8621 continue;
8622 }
8623
8624 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8625 continue;
8626
8627 tls_set = 0;
8628 tls_clear = 0;
8629 expecting_tls_get_addr = 2;
8630 break;
8631
8632 case R_PPC64_TPREL64:
8633 if (pass == 0
8634 || sec != toc
8635 || toc_ref == NULL
8636 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8637 continue;
8638 if (ok_tprel)
8639 {
8640 /* IE -> LE */
8641 tls_set = TLS_EXPLICIT;
8642 tls_clear = TLS_TPREL;
8643 break;
8644 }
8645 continue;
8646
8647 case R_PPC64_DTPMOD64:
8648 if (pass == 0
8649 || sec != toc
8650 || toc_ref == NULL
8651 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8652 continue;
8653 if (rel + 1 < relend
8654 && (rel[1].r_info
8655 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8656 && rel[1].r_offset == rel->r_offset + 8)
8657 {
8658 if (ok_tprel)
8659 /* GD -> LE */
8660 tls_set = TLS_EXPLICIT | TLS_GD;
8661 else
8662 /* GD -> IE */
8663 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8664 tls_clear = TLS_GD;
8665 }
8666 else
8667 {
8668 if (!is_local)
8669 continue;
8670
8671 /* LD -> LE */
8672 tls_set = TLS_EXPLICIT;
8673 tls_clear = TLS_LD;
8674 }
8675 break;
8676
8677 default:
8678 continue;
8679 }
8680
8681 if (pass == 0)
8682 {
8683 if (!expecting_tls_get_addr
8684 || !sec->has_tls_get_addr_call)
8685 continue;
8686
8687 if (rel + 1 < relend
8688 && branch_reloc_hash_match (ibfd, rel + 1,
8689 htab->tls_get_addr,
8690 htab->tls_get_addr_fd))
8691 {
8692 if (expecting_tls_get_addr == 2)
8693 {
8694 /* Check for toc tls entries. */
8695 unsigned char *toc_tls;
8696 int retval;
8697
8698 retval = get_tls_mask (&toc_tls, NULL, NULL,
8699 &locsyms,
8700 rel, ibfd);
8701 if (retval == 0)
8702 goto err_free_rel;
8703 if (toc_tls != NULL)
8704 {
8705 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8706 found_tls_get_addr_arg = 1;
8707 if (retval > 1)
8708 toc_ref[toc_ref_index] = 1;
8709 }
8710 }
8711 continue;
8712 }
8713
8714 if (expecting_tls_get_addr != 1)
8715 continue;
8716
8717 /* Uh oh, we didn't find the expected call. We
8718 could just mark this symbol to exclude it
8719 from tls optimization but it's safer to skip
8720 the entire optimization. */
8721 /* xgettext:c-format */
8722 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8723 "TLS optimization disabled\n"),
8724 ibfd, sec, rel->r_offset);
8725 ret = TRUE;
8726 goto err_free_rel;
8727 }
8728
8729 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8730 {
8731 struct plt_entry *ent;
8732 for (ent = htab->tls_get_addr->elf.plt.plist;
8733 ent != NULL;
8734 ent = ent->next)
8735 if (ent->addend == 0)
8736 {
8737 if (ent->plt.refcount > 0)
8738 {
8739 ent->plt.refcount -= 1;
8740 expecting_tls_get_addr = 0;
8741 }
8742 break;
8743 }
8744 }
8745
8746 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8747 {
8748 struct plt_entry *ent;
8749 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8750 ent != NULL;
8751 ent = ent->next)
8752 if (ent->addend == 0)
8753 {
8754 if (ent->plt.refcount > 0)
8755 ent->plt.refcount -= 1;
8756 break;
8757 }
8758 }
8759
8760 if (tls_clear == 0)
8761 continue;
8762
8763 if ((tls_set & TLS_EXPLICIT) == 0)
8764 {
8765 struct got_entry *ent;
8766
8767 /* Adjust got entry for this reloc. */
8768 if (h != NULL)
8769 ent = h->got.glist;
8770 else
8771 ent = elf_local_got_ents (ibfd)[r_symndx];
8772
8773 for (; ent != NULL; ent = ent->next)
8774 if (ent->addend == rel->r_addend
8775 && ent->owner == ibfd
8776 && ent->tls_type == tls_type)
8777 break;
8778 if (ent == NULL)
8779 abort ();
8780
8781 if (tls_set == 0)
8782 {
8783 /* We managed to get rid of a got entry. */
8784 if (ent->got.refcount > 0)
8785 ent->got.refcount -= 1;
8786 }
8787 }
8788 else
8789 {
8790 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8791 we'll lose one or two dyn relocs. */
8792 if (!dec_dynrel_count (rel->r_info, sec, info,
8793 NULL, h, sym))
8794 return FALSE;
8795
8796 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8797 {
8798 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8799 NULL, h, sym))
8800 return FALSE;
8801 }
8802 }
8803
8804 *tls_mask |= tls_set;
8805 *tls_mask &= ~tls_clear;
8806 }
8807
8808 if (elf_section_data (sec)->relocs != relstart)
8809 free (relstart);
8810 }
8811
8812 if (locsyms != NULL
8813 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8814 {
8815 if (!info->keep_memory)
8816 free (locsyms);
8817 else
8818 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8819 }
8820 }
8821
8822 if (toc_ref != NULL)
8823 free (toc_ref);
8824 return TRUE;
8825 }
8826
8827 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8828 the values of any global symbols in a toc section that has been
8829 edited. Globals in toc sections should be a rarity, so this function
8830 sets a flag if any are found in toc sections other than the one just
8831 edited, so that futher hash table traversals can be avoided. */
8832
8833 struct adjust_toc_info
8834 {
8835 asection *toc;
8836 unsigned long *skip;
8837 bfd_boolean global_toc_syms;
8838 };
8839
8840 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8841
8842 static bfd_boolean
8843 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8844 {
8845 struct ppc_link_hash_entry *eh;
8846 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8847 unsigned long i;
8848
8849 if (h->root.type != bfd_link_hash_defined
8850 && h->root.type != bfd_link_hash_defweak)
8851 return TRUE;
8852
8853 eh = (struct ppc_link_hash_entry *) h;
8854 if (eh->adjust_done)
8855 return TRUE;
8856
8857 if (eh->elf.root.u.def.section == toc_inf->toc)
8858 {
8859 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8860 i = toc_inf->toc->rawsize >> 3;
8861 else
8862 i = eh->elf.root.u.def.value >> 3;
8863
8864 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8865 {
8866 _bfd_error_handler
8867 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8868 do
8869 ++i;
8870 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8871 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8872 }
8873
8874 eh->elf.root.u.def.value -= toc_inf->skip[i];
8875 eh->adjust_done = 1;
8876 }
8877 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8878 toc_inf->global_toc_syms = TRUE;
8879
8880 return TRUE;
8881 }
8882
8883 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8884
8885 static bfd_boolean
8886 ok_lo_toc_insn (unsigned int insn)
8887 {
8888 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8889 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8890 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8891 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8892 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8893 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8894 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8895 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8896 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8897 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8898 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8899 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8900 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8901 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8902 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8903 && (insn & 3) != 1)
8904 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8905 && ((insn & 3) == 0 || (insn & 3) == 3))
8906 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8907 }
8908
8909 /* Examine all relocs referencing .toc sections in order to remove
8910 unused .toc entries. */
8911
8912 bfd_boolean
8913 ppc64_elf_edit_toc (struct bfd_link_info *info)
8914 {
8915 bfd *ibfd;
8916 struct adjust_toc_info toc_inf;
8917 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8918
8919 htab->do_toc_opt = 1;
8920 toc_inf.global_toc_syms = TRUE;
8921 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8922 {
8923 asection *toc, *sec;
8924 Elf_Internal_Shdr *symtab_hdr;
8925 Elf_Internal_Sym *local_syms;
8926 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8927 unsigned long *skip, *drop;
8928 unsigned char *used;
8929 unsigned char *keep, last, some_unused;
8930
8931 if (!is_ppc64_elf (ibfd))
8932 continue;
8933
8934 toc = bfd_get_section_by_name (ibfd, ".toc");
8935 if (toc == NULL
8936 || toc->size == 0
8937 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8938 || discarded_section (toc))
8939 continue;
8940
8941 toc_relocs = NULL;
8942 local_syms = NULL;
8943 symtab_hdr = &elf_symtab_hdr (ibfd);
8944
8945 /* Look at sections dropped from the final link. */
8946 skip = NULL;
8947 relstart = NULL;
8948 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8949 {
8950 if (sec->reloc_count == 0
8951 || !discarded_section (sec)
8952 || get_opd_info (sec)
8953 || (sec->flags & SEC_ALLOC) == 0
8954 || (sec->flags & SEC_DEBUGGING) != 0)
8955 continue;
8956
8957 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8958 if (relstart == NULL)
8959 goto error_ret;
8960
8961 /* Run through the relocs to see which toc entries might be
8962 unused. */
8963 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8964 {
8965 enum elf_ppc64_reloc_type r_type;
8966 unsigned long r_symndx;
8967 asection *sym_sec;
8968 struct elf_link_hash_entry *h;
8969 Elf_Internal_Sym *sym;
8970 bfd_vma val;
8971
8972 r_type = ELF64_R_TYPE (rel->r_info);
8973 switch (r_type)
8974 {
8975 default:
8976 continue;
8977
8978 case R_PPC64_TOC16:
8979 case R_PPC64_TOC16_LO:
8980 case R_PPC64_TOC16_HI:
8981 case R_PPC64_TOC16_HA:
8982 case R_PPC64_TOC16_DS:
8983 case R_PPC64_TOC16_LO_DS:
8984 break;
8985 }
8986
8987 r_symndx = ELF64_R_SYM (rel->r_info);
8988 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8989 r_symndx, ibfd))
8990 goto error_ret;
8991
8992 if (sym_sec != toc)
8993 continue;
8994
8995 if (h != NULL)
8996 val = h->root.u.def.value;
8997 else
8998 val = sym->st_value;
8999 val += rel->r_addend;
9000
9001 if (val >= toc->size)
9002 continue;
9003
9004 /* Anything in the toc ought to be aligned to 8 bytes.
9005 If not, don't mark as unused. */
9006 if (val & 7)
9007 continue;
9008
9009 if (skip == NULL)
9010 {
9011 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9012 if (skip == NULL)
9013 goto error_ret;
9014 }
9015
9016 skip[val >> 3] = ref_from_discarded;
9017 }
9018
9019 if (elf_section_data (sec)->relocs != relstart)
9020 free (relstart);
9021 }
9022
9023 /* For largetoc loads of address constants, we can convert
9024 . addis rx,2,addr@got@ha
9025 . ld ry,addr@got@l(rx)
9026 to
9027 . addis rx,2,addr@toc@ha
9028 . addi ry,rx,addr@toc@l
9029 when addr is within 2G of the toc pointer. This then means
9030 that the word storing "addr" in the toc is no longer needed. */
9031
9032 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9033 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9034 && toc->reloc_count != 0)
9035 {
9036 /* Read toc relocs. */
9037 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9038 info->keep_memory);
9039 if (toc_relocs == NULL)
9040 goto error_ret;
9041
9042 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9043 {
9044 enum elf_ppc64_reloc_type r_type;
9045 unsigned long r_symndx;
9046 asection *sym_sec;
9047 struct elf_link_hash_entry *h;
9048 Elf_Internal_Sym *sym;
9049 bfd_vma val, addr;
9050
9051 r_type = ELF64_R_TYPE (rel->r_info);
9052 if (r_type != R_PPC64_ADDR64)
9053 continue;
9054
9055 r_symndx = ELF64_R_SYM (rel->r_info);
9056 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9057 r_symndx, ibfd))
9058 goto error_ret;
9059
9060 if (sym_sec == NULL
9061 || sym_sec->output_section == NULL
9062 || discarded_section (sym_sec))
9063 continue;
9064
9065 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9066 continue;
9067
9068 if (h != NULL)
9069 {
9070 if (h->type == STT_GNU_IFUNC)
9071 continue;
9072 val = h->root.u.def.value;
9073 }
9074 else
9075 {
9076 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9077 continue;
9078 val = sym->st_value;
9079 }
9080 val += rel->r_addend;
9081 val += sym_sec->output_section->vma + sym_sec->output_offset;
9082
9083 /* We don't yet know the exact toc pointer value, but we
9084 know it will be somewhere in the toc section. Don't
9085 optimize if the difference from any possible toc
9086 pointer is outside [ff..f80008000, 7fff7fff]. */
9087 addr = toc->output_section->vma + TOC_BASE_OFF;
9088 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9089 continue;
9090
9091 addr = toc->output_section->vma + toc->output_section->rawsize;
9092 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9093 continue;
9094
9095 if (skip == NULL)
9096 {
9097 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9098 if (skip == NULL)
9099 goto error_ret;
9100 }
9101
9102 skip[rel->r_offset >> 3]
9103 |= can_optimize | ((rel - toc_relocs) << 2);
9104 }
9105 }
9106
9107 if (skip == NULL)
9108 continue;
9109
9110 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9111 if (used == NULL)
9112 {
9113 error_ret:
9114 if (local_syms != NULL
9115 && symtab_hdr->contents != (unsigned char *) local_syms)
9116 free (local_syms);
9117 if (sec != NULL
9118 && relstart != NULL
9119 && elf_section_data (sec)->relocs != relstart)
9120 free (relstart);
9121 if (toc_relocs != NULL
9122 && elf_section_data (toc)->relocs != toc_relocs)
9123 free (toc_relocs);
9124 if (skip != NULL)
9125 free (skip);
9126 return FALSE;
9127 }
9128
9129 /* Now check all kept sections that might reference the toc.
9130 Check the toc itself last. */
9131 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9132 : ibfd->sections);
9133 sec != NULL;
9134 sec = (sec == toc ? NULL
9135 : sec->next == NULL ? toc
9136 : sec->next == toc && toc->next ? toc->next
9137 : sec->next))
9138 {
9139 int repeat;
9140
9141 if (sec->reloc_count == 0
9142 || discarded_section (sec)
9143 || get_opd_info (sec)
9144 || (sec->flags & SEC_ALLOC) == 0
9145 || (sec->flags & SEC_DEBUGGING) != 0)
9146 continue;
9147
9148 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9149 info->keep_memory);
9150 if (relstart == NULL)
9151 {
9152 free (used);
9153 goto error_ret;
9154 }
9155
9156 /* Mark toc entries referenced as used. */
9157 do
9158 {
9159 repeat = 0;
9160 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9161 {
9162 enum elf_ppc64_reloc_type r_type;
9163 unsigned long r_symndx;
9164 asection *sym_sec;
9165 struct elf_link_hash_entry *h;
9166 Elf_Internal_Sym *sym;
9167 bfd_vma val;
9168 enum {no_check, check_lo, check_ha} insn_check;
9169
9170 r_type = ELF64_R_TYPE (rel->r_info);
9171 switch (r_type)
9172 {
9173 default:
9174 insn_check = no_check;
9175 break;
9176
9177 case R_PPC64_GOT_TLSLD16_HA:
9178 case R_PPC64_GOT_TLSGD16_HA:
9179 case R_PPC64_GOT_TPREL16_HA:
9180 case R_PPC64_GOT_DTPREL16_HA:
9181 case R_PPC64_GOT16_HA:
9182 case R_PPC64_TOC16_HA:
9183 insn_check = check_ha;
9184 break;
9185
9186 case R_PPC64_GOT_TLSLD16_LO:
9187 case R_PPC64_GOT_TLSGD16_LO:
9188 case R_PPC64_GOT_TPREL16_LO_DS:
9189 case R_PPC64_GOT_DTPREL16_LO_DS:
9190 case R_PPC64_GOT16_LO:
9191 case R_PPC64_GOT16_LO_DS:
9192 case R_PPC64_TOC16_LO:
9193 case R_PPC64_TOC16_LO_DS:
9194 insn_check = check_lo;
9195 break;
9196 }
9197
9198 if (insn_check != no_check)
9199 {
9200 bfd_vma off = rel->r_offset & ~3;
9201 unsigned char buf[4];
9202 unsigned int insn;
9203
9204 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9205 {
9206 free (used);
9207 goto error_ret;
9208 }
9209 insn = bfd_get_32 (ibfd, buf);
9210 if (insn_check == check_lo
9211 ? !ok_lo_toc_insn (insn)
9212 : ((insn & ((0x3f << 26) | 0x1f << 16))
9213 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9214 {
9215 char str[12];
9216
9217 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9218 sprintf (str, "%#08x", insn);
9219 info->callbacks->einfo
9220 /* xgettext:c-format */
9221 (_("%P: %H: toc optimization is not supported for"
9222 " %s instruction.\n"),
9223 ibfd, sec, rel->r_offset & ~3, str);
9224 }
9225 }
9226
9227 switch (r_type)
9228 {
9229 case R_PPC64_TOC16:
9230 case R_PPC64_TOC16_LO:
9231 case R_PPC64_TOC16_HI:
9232 case R_PPC64_TOC16_HA:
9233 case R_PPC64_TOC16_DS:
9234 case R_PPC64_TOC16_LO_DS:
9235 /* In case we're taking addresses of toc entries. */
9236 case R_PPC64_ADDR64:
9237 break;
9238
9239 default:
9240 continue;
9241 }
9242
9243 r_symndx = ELF64_R_SYM (rel->r_info);
9244 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9245 r_symndx, ibfd))
9246 {
9247 free (used);
9248 goto error_ret;
9249 }
9250
9251 if (sym_sec != toc)
9252 continue;
9253
9254 if (h != NULL)
9255 val = h->root.u.def.value;
9256 else
9257 val = sym->st_value;
9258 val += rel->r_addend;
9259
9260 if (val >= toc->size)
9261 continue;
9262
9263 if ((skip[val >> 3] & can_optimize) != 0)
9264 {
9265 bfd_vma off;
9266 unsigned char opc;
9267
9268 switch (r_type)
9269 {
9270 case R_PPC64_TOC16_HA:
9271 break;
9272
9273 case R_PPC64_TOC16_LO_DS:
9274 off = rel->r_offset;
9275 off += (bfd_big_endian (ibfd) ? -2 : 3);
9276 if (!bfd_get_section_contents (ibfd, sec, &opc,
9277 off, 1))
9278 {
9279 free (used);
9280 goto error_ret;
9281 }
9282 if ((opc & (0x3f << 2)) == (58u << 2))
9283 break;
9284 /* Fall through. */
9285
9286 default:
9287 /* Wrong sort of reloc, or not a ld. We may
9288 as well clear ref_from_discarded too. */
9289 skip[val >> 3] = 0;
9290 }
9291 }
9292
9293 if (sec != toc)
9294 used[val >> 3] = 1;
9295 /* For the toc section, we only mark as used if this
9296 entry itself isn't unused. */
9297 else if ((used[rel->r_offset >> 3]
9298 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9299 && !used[val >> 3])
9300 {
9301 /* Do all the relocs again, to catch reference
9302 chains. */
9303 repeat = 1;
9304 used[val >> 3] = 1;
9305 }
9306 }
9307 }
9308 while (repeat);
9309
9310 if (elf_section_data (sec)->relocs != relstart)
9311 free (relstart);
9312 }
9313
9314 /* Merge the used and skip arrays. Assume that TOC
9315 doublewords not appearing as either used or unused belong
9316 to to an entry more than one doubleword in size. */
9317 for (drop = skip, keep = used, last = 0, some_unused = 0;
9318 drop < skip + (toc->size + 7) / 8;
9319 ++drop, ++keep)
9320 {
9321 if (*keep)
9322 {
9323 *drop &= ~ref_from_discarded;
9324 if ((*drop & can_optimize) != 0)
9325 some_unused = 1;
9326 last = 0;
9327 }
9328 else if ((*drop & ref_from_discarded) != 0)
9329 {
9330 some_unused = 1;
9331 last = ref_from_discarded;
9332 }
9333 else
9334 *drop = last;
9335 }
9336
9337 free (used);
9338
9339 if (some_unused)
9340 {
9341 bfd_byte *contents, *src;
9342 unsigned long off;
9343 Elf_Internal_Sym *sym;
9344 bfd_boolean local_toc_syms = FALSE;
9345
9346 /* Shuffle the toc contents, and at the same time convert the
9347 skip array from booleans into offsets. */
9348 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9349 goto error_ret;
9350
9351 elf_section_data (toc)->this_hdr.contents = contents;
9352
9353 for (src = contents, off = 0, drop = skip;
9354 src < contents + toc->size;
9355 src += 8, ++drop)
9356 {
9357 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9358 off += 8;
9359 else if (off != 0)
9360 {
9361 *drop = off;
9362 memcpy (src - off, src, 8);
9363 }
9364 }
9365 *drop = off;
9366 toc->rawsize = toc->size;
9367 toc->size = src - contents - off;
9368
9369 /* Adjust addends for relocs against the toc section sym,
9370 and optimize any accesses we can. */
9371 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9372 {
9373 if (sec->reloc_count == 0
9374 || discarded_section (sec))
9375 continue;
9376
9377 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9378 info->keep_memory);
9379 if (relstart == NULL)
9380 goto error_ret;
9381
9382 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9383 {
9384 enum elf_ppc64_reloc_type r_type;
9385 unsigned long r_symndx;
9386 asection *sym_sec;
9387 struct elf_link_hash_entry *h;
9388 bfd_vma val;
9389
9390 r_type = ELF64_R_TYPE (rel->r_info);
9391 switch (r_type)
9392 {
9393 default:
9394 continue;
9395
9396 case R_PPC64_TOC16:
9397 case R_PPC64_TOC16_LO:
9398 case R_PPC64_TOC16_HI:
9399 case R_PPC64_TOC16_HA:
9400 case R_PPC64_TOC16_DS:
9401 case R_PPC64_TOC16_LO_DS:
9402 case R_PPC64_ADDR64:
9403 break;
9404 }
9405
9406 r_symndx = ELF64_R_SYM (rel->r_info);
9407 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9408 r_symndx, ibfd))
9409 goto error_ret;
9410
9411 if (sym_sec != toc)
9412 continue;
9413
9414 if (h != NULL)
9415 val = h->root.u.def.value;
9416 else
9417 {
9418 val = sym->st_value;
9419 if (val != 0)
9420 local_toc_syms = TRUE;
9421 }
9422
9423 val += rel->r_addend;
9424
9425 if (val > toc->rawsize)
9426 val = toc->rawsize;
9427 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9428 continue;
9429 else if ((skip[val >> 3] & can_optimize) != 0)
9430 {
9431 Elf_Internal_Rela *tocrel
9432 = toc_relocs + (skip[val >> 3] >> 2);
9433 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9434
9435 switch (r_type)
9436 {
9437 case R_PPC64_TOC16_HA:
9438 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9439 break;
9440
9441 case R_PPC64_TOC16_LO_DS:
9442 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9443 break;
9444
9445 default:
9446 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9447 ppc_howto_init ();
9448 info->callbacks->einfo
9449 /* xgettext:c-format */
9450 (_("%P: %H: %s references "
9451 "optimized away TOC entry\n"),
9452 ibfd, sec, rel->r_offset,
9453 ppc64_elf_howto_table[r_type]->name);
9454 bfd_set_error (bfd_error_bad_value);
9455 goto error_ret;
9456 }
9457 rel->r_addend = tocrel->r_addend;
9458 elf_section_data (sec)->relocs = relstart;
9459 continue;
9460 }
9461
9462 if (h != NULL || sym->st_value != 0)
9463 continue;
9464
9465 rel->r_addend -= skip[val >> 3];
9466 elf_section_data (sec)->relocs = relstart;
9467 }
9468
9469 if (elf_section_data (sec)->relocs != relstart)
9470 free (relstart);
9471 }
9472
9473 /* We shouldn't have local or global symbols defined in the TOC,
9474 but handle them anyway. */
9475 if (local_syms != NULL)
9476 for (sym = local_syms;
9477 sym < local_syms + symtab_hdr->sh_info;
9478 ++sym)
9479 if (sym->st_value != 0
9480 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9481 {
9482 unsigned long i;
9483
9484 if (sym->st_value > toc->rawsize)
9485 i = toc->rawsize >> 3;
9486 else
9487 i = sym->st_value >> 3;
9488
9489 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9490 {
9491 if (local_toc_syms)
9492 _bfd_error_handler
9493 (_("%s defined on removed toc entry"),
9494 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9495 do
9496 ++i;
9497 while ((skip[i] & (ref_from_discarded | can_optimize)));
9498 sym->st_value = (bfd_vma) i << 3;
9499 }
9500
9501 sym->st_value -= skip[i];
9502 symtab_hdr->contents = (unsigned char *) local_syms;
9503 }
9504
9505 /* Adjust any global syms defined in this toc input section. */
9506 if (toc_inf.global_toc_syms)
9507 {
9508 toc_inf.toc = toc;
9509 toc_inf.skip = skip;
9510 toc_inf.global_toc_syms = FALSE;
9511 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9512 &toc_inf);
9513 }
9514
9515 if (toc->reloc_count != 0)
9516 {
9517 Elf_Internal_Shdr *rel_hdr;
9518 Elf_Internal_Rela *wrel;
9519 bfd_size_type sz;
9520
9521 /* Remove unused toc relocs, and adjust those we keep. */
9522 if (toc_relocs == NULL)
9523 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9524 info->keep_memory);
9525 if (toc_relocs == NULL)
9526 goto error_ret;
9527
9528 wrel = toc_relocs;
9529 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9530 if ((skip[rel->r_offset >> 3]
9531 & (ref_from_discarded | can_optimize)) == 0)
9532 {
9533 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9534 wrel->r_info = rel->r_info;
9535 wrel->r_addend = rel->r_addend;
9536 ++wrel;
9537 }
9538 else if (!dec_dynrel_count (rel->r_info, toc, info,
9539 &local_syms, NULL, NULL))
9540 goto error_ret;
9541
9542 elf_section_data (toc)->relocs = toc_relocs;
9543 toc->reloc_count = wrel - toc_relocs;
9544 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9545 sz = rel_hdr->sh_entsize;
9546 rel_hdr->sh_size = toc->reloc_count * sz;
9547 }
9548 }
9549 else if (toc_relocs != NULL
9550 && elf_section_data (toc)->relocs != toc_relocs)
9551 free (toc_relocs);
9552
9553 if (local_syms != NULL
9554 && symtab_hdr->contents != (unsigned char *) local_syms)
9555 {
9556 if (!info->keep_memory)
9557 free (local_syms);
9558 else
9559 symtab_hdr->contents = (unsigned char *) local_syms;
9560 }
9561 free (skip);
9562 }
9563
9564 return TRUE;
9565 }
9566
9567 /* Return true iff input section I references the TOC using
9568 instructions limited to +/-32k offsets. */
9569
9570 bfd_boolean
9571 ppc64_elf_has_small_toc_reloc (asection *i)
9572 {
9573 return (is_ppc64_elf (i->owner)
9574 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9575 }
9576
9577 /* Allocate space for one GOT entry. */
9578
9579 static void
9580 allocate_got (struct elf_link_hash_entry *h,
9581 struct bfd_link_info *info,
9582 struct got_entry *gent)
9583 {
9584 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9585 bfd_boolean dyn;
9586 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9587 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9588 ? 16 : 8);
9589 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9590 ? 2 : 1) * sizeof (Elf64_External_Rela);
9591 asection *got = ppc64_elf_tdata (gent->owner)->got;
9592
9593 gent->got.offset = got->size;
9594 got->size += entsize;
9595
9596 dyn = htab->elf.dynamic_sections_created;
9597 if (h->type == STT_GNU_IFUNC)
9598 {
9599 htab->elf.irelplt->size += rentsize;
9600 htab->got_reli_size += rentsize;
9601 }
9602 else if ((bfd_link_pic (info)
9603 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9604 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9605 || h->root.type != bfd_link_hash_undefweak))
9606 {
9607 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9608 relgot->size += rentsize;
9609 }
9610 }
9611
9612 /* This function merges got entries in the same toc group. */
9613
9614 static void
9615 merge_got_entries (struct got_entry **pent)
9616 {
9617 struct got_entry *ent, *ent2;
9618
9619 for (ent = *pent; ent != NULL; ent = ent->next)
9620 if (!ent->is_indirect)
9621 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9622 if (!ent2->is_indirect
9623 && ent2->addend == ent->addend
9624 && ent2->tls_type == ent->tls_type
9625 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9626 {
9627 ent2->is_indirect = TRUE;
9628 ent2->got.ent = ent;
9629 }
9630 }
9631
9632 /* Allocate space in .plt, .got and associated reloc sections for
9633 dynamic relocs. */
9634
9635 static bfd_boolean
9636 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9637 {
9638 struct bfd_link_info *info;
9639 struct ppc_link_hash_table *htab;
9640 asection *s;
9641 struct ppc_link_hash_entry *eh;
9642 struct got_entry **pgent, *gent;
9643
9644 if (h->root.type == bfd_link_hash_indirect)
9645 return TRUE;
9646
9647 info = (struct bfd_link_info *) inf;
9648 htab = ppc_hash_table (info);
9649 if (htab == NULL)
9650 return FALSE;
9651
9652 eh = (struct ppc_link_hash_entry *) h;
9653 /* Run through the TLS GD got entries first if we're changing them
9654 to TPREL. */
9655 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9656 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9657 if (gent->got.refcount > 0
9658 && (gent->tls_type & TLS_GD) != 0)
9659 {
9660 /* This was a GD entry that has been converted to TPREL. If
9661 there happens to be a TPREL entry we can use that one. */
9662 struct got_entry *ent;
9663 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9664 if (ent->got.refcount > 0
9665 && (ent->tls_type & TLS_TPREL) != 0
9666 && ent->addend == gent->addend
9667 && ent->owner == gent->owner)
9668 {
9669 gent->got.refcount = 0;
9670 break;
9671 }
9672
9673 /* If not, then we'll be using our own TPREL entry. */
9674 if (gent->got.refcount != 0)
9675 gent->tls_type = TLS_TLS | TLS_TPREL;
9676 }
9677
9678 /* Remove any list entry that won't generate a word in the GOT before
9679 we call merge_got_entries. Otherwise we risk merging to empty
9680 entries. */
9681 pgent = &h->got.glist;
9682 while ((gent = *pgent) != NULL)
9683 if (gent->got.refcount > 0)
9684 {
9685 if ((gent->tls_type & TLS_LD) != 0
9686 && !h->def_dynamic)
9687 {
9688 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9689 *pgent = gent->next;
9690 }
9691 else
9692 pgent = &gent->next;
9693 }
9694 else
9695 *pgent = gent->next;
9696
9697 if (!htab->do_multi_toc)
9698 merge_got_entries (&h->got.glist);
9699
9700 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9701 if (!gent->is_indirect)
9702 {
9703 /* Make sure this symbol is output as a dynamic symbol.
9704 Undefined weak syms won't yet be marked as dynamic,
9705 nor will all TLS symbols. */
9706 if (h->dynindx == -1
9707 && !h->forced_local
9708 && h->type != STT_GNU_IFUNC
9709 && htab->elf.dynamic_sections_created)
9710 {
9711 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9712 return FALSE;
9713 }
9714
9715 if (!is_ppc64_elf (gent->owner))
9716 abort ();
9717
9718 allocate_got (h, info, gent);
9719 }
9720
9721 if (!htab->elf.dynamic_sections_created
9722 && h->type != STT_GNU_IFUNC)
9723 eh->dyn_relocs = NULL;
9724
9725 if (eh->dyn_relocs != NULL)
9726 {
9727 struct elf_dyn_relocs *p, **pp;
9728
9729 /* In the shared -Bsymbolic case, discard space allocated for
9730 dynamic pc-relative relocs against symbols which turn out to
9731 be defined in regular objects. For the normal shared case,
9732 discard space for relocs that have become local due to symbol
9733 visibility changes. */
9734
9735 if (bfd_link_pic (info))
9736 {
9737 /* Relocs that use pc_count are those that appear on a call
9738 insn, or certain REL relocs (see must_be_dyn_reloc) that
9739 can be generated via assembly. We want calls to
9740 protected symbols to resolve directly to the function
9741 rather than going via the plt. If people want function
9742 pointer comparisons to work as expected then they should
9743 avoid writing weird assembly. */
9744 if (SYMBOL_CALLS_LOCAL (info, h))
9745 {
9746 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9747 {
9748 p->count -= p->pc_count;
9749 p->pc_count = 0;
9750 if (p->count == 0)
9751 *pp = p->next;
9752 else
9753 pp = &p->next;
9754 }
9755 }
9756
9757 /* Also discard relocs on undefined weak syms with
9758 non-default visibility. */
9759 if (eh->dyn_relocs != NULL
9760 && h->root.type == bfd_link_hash_undefweak)
9761 {
9762 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9763 eh->dyn_relocs = NULL;
9764
9765 /* Make sure this symbol is output as a dynamic symbol.
9766 Undefined weak syms won't yet be marked as dynamic. */
9767 else if (h->dynindx == -1
9768 && !h->forced_local)
9769 {
9770 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9771 return FALSE;
9772 }
9773 }
9774 }
9775 else if (h->type == STT_GNU_IFUNC)
9776 {
9777 /* A plt entry is always created when making direct calls to
9778 an ifunc, even when building a static executable, but
9779 that doesn't cover all cases. We may have only an ifunc
9780 initialised function pointer for a given ifunc symbol.
9781
9782 For ELFv2, dynamic relocations are not required when
9783 generating a global entry PLT stub. */
9784 if (abiversion (info->output_bfd) >= 2)
9785 {
9786 if (global_entry_stub (h))
9787 eh->dyn_relocs = NULL;
9788 }
9789
9790 /* For ELFv1 we have function descriptors. Descriptors need
9791 to be treated like PLT entries and thus have dynamic
9792 relocations. One exception is when the function
9793 descriptor is copied into .dynbss (which should only
9794 happen with ancient versions of gcc). */
9795 else if (h->needs_copy)
9796 eh->dyn_relocs = NULL;
9797 }
9798 else if (ELIMINATE_COPY_RELOCS)
9799 {
9800 /* For the non-pic case, discard space for relocs against
9801 symbols which turn out to need copy relocs or are not
9802 dynamic. */
9803
9804 /* First make sure this symbol is output as a dynamic symbol.
9805 Undefined weak syms won't yet be marked as dynamic. */
9806 if (h->root.type == bfd_link_hash_undefweak
9807 && !h->non_got_ref
9808 && !h->def_regular
9809 && h->dynindx == -1
9810 && !h->forced_local
9811 && !bfd_elf_link_record_dynamic_symbol (info, h))
9812 return FALSE;
9813
9814 if (h->non_got_ref
9815 || h->def_regular
9816 || h->dynindx == -1)
9817 eh->dyn_relocs = NULL;
9818 }
9819
9820 /* Finally, allocate space. */
9821 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9822 {
9823 asection *sreloc = elf_section_data (p->sec)->sreloc;
9824 if (eh->elf.type == STT_GNU_IFUNC)
9825 sreloc = htab->elf.irelplt;
9826 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9827 }
9828 }
9829
9830 if ((htab->elf.dynamic_sections_created
9831 && h->dynindx != -1
9832 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9833 || h->type == STT_GNU_IFUNC)
9834 {
9835 struct plt_entry *pent;
9836 bfd_boolean doneone = FALSE;
9837 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9838 if (pent->plt.refcount > 0)
9839 {
9840 if (!htab->elf.dynamic_sections_created
9841 || h->dynindx == -1)
9842 {
9843 s = htab->elf.iplt;
9844 pent->plt.offset = s->size;
9845 s->size += PLT_ENTRY_SIZE (htab);
9846 s = htab->elf.irelplt;
9847 }
9848 else
9849 {
9850 /* If this is the first .plt entry, make room for the special
9851 first entry. */
9852 s = htab->elf.splt;
9853 if (s->size == 0)
9854 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9855
9856 pent->plt.offset = s->size;
9857
9858 /* Make room for this entry. */
9859 s->size += PLT_ENTRY_SIZE (htab);
9860
9861 /* Make room for the .glink code. */
9862 s = htab->glink;
9863 if (s->size == 0)
9864 s->size += GLINK_CALL_STUB_SIZE;
9865 if (htab->opd_abi)
9866 {
9867 /* We need bigger stubs past index 32767. */
9868 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9869 s->size += 4;
9870 s->size += 2*4;
9871 }
9872 else
9873 s->size += 4;
9874
9875 /* We also need to make an entry in the .rela.plt section. */
9876 s = htab->elf.srelplt;
9877 }
9878 s->size += sizeof (Elf64_External_Rela);
9879 doneone = TRUE;
9880 }
9881 else
9882 pent->plt.offset = (bfd_vma) -1;
9883 if (!doneone)
9884 {
9885 h->plt.plist = NULL;
9886 h->needs_plt = 0;
9887 }
9888 }
9889 else
9890 {
9891 h->plt.plist = NULL;
9892 h->needs_plt = 0;
9893 }
9894
9895 return TRUE;
9896 }
9897
9898 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9899 to set up space for global entry stubs. These are put in glink,
9900 after the branch table. */
9901
9902 static bfd_boolean
9903 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9904 {
9905 struct bfd_link_info *info;
9906 struct ppc_link_hash_table *htab;
9907 struct plt_entry *pent;
9908 asection *s;
9909
9910 if (h->root.type == bfd_link_hash_indirect)
9911 return TRUE;
9912
9913 if (!h->pointer_equality_needed)
9914 return TRUE;
9915
9916 if (h->def_regular)
9917 return TRUE;
9918
9919 info = inf;
9920 htab = ppc_hash_table (info);
9921 if (htab == NULL)
9922 return FALSE;
9923
9924 s = htab->glink;
9925 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9926 if (pent->plt.offset != (bfd_vma) -1
9927 && pent->addend == 0)
9928 {
9929 /* For ELFv2, if this symbol is not defined in a regular file
9930 and we are not generating a shared library or pie, then we
9931 need to define the symbol in the executable on a call stub.
9932 This is to avoid text relocations. */
9933 s->size = (s->size + 15) & -16;
9934 h->root.type = bfd_link_hash_defined;
9935 h->root.u.def.section = s;
9936 h->root.u.def.value = s->size;
9937 s->size += 16;
9938 break;
9939 }
9940 return TRUE;
9941 }
9942
9943 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9944 read-only sections. */
9945
9946 static bfd_boolean
9947 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9948 {
9949 if (h->root.type == bfd_link_hash_indirect)
9950 return TRUE;
9951
9952 if (readonly_dynrelocs (h))
9953 {
9954 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9955
9956 /* Not an error, just cut short the traversal. */
9957 return FALSE;
9958 }
9959 return TRUE;
9960 }
9961
9962 /* Set the sizes of the dynamic sections. */
9963
9964 static bfd_boolean
9965 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9966 struct bfd_link_info *info)
9967 {
9968 struct ppc_link_hash_table *htab;
9969 bfd *dynobj;
9970 asection *s;
9971 bfd_boolean relocs;
9972 bfd *ibfd;
9973 struct got_entry *first_tlsld;
9974
9975 htab = ppc_hash_table (info);
9976 if (htab == NULL)
9977 return FALSE;
9978
9979 dynobj = htab->elf.dynobj;
9980 if (dynobj == NULL)
9981 abort ();
9982
9983 if (htab->elf.dynamic_sections_created)
9984 {
9985 /* Set the contents of the .interp section to the interpreter. */
9986 if (bfd_link_executable (info) && !info->nointerp)
9987 {
9988 s = bfd_get_linker_section (dynobj, ".interp");
9989 if (s == NULL)
9990 abort ();
9991 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9992 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9993 }
9994 }
9995
9996 /* Set up .got offsets for local syms, and space for local dynamic
9997 relocs. */
9998 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9999 {
10000 struct got_entry **lgot_ents;
10001 struct got_entry **end_lgot_ents;
10002 struct plt_entry **local_plt;
10003 struct plt_entry **end_local_plt;
10004 unsigned char *lgot_masks;
10005 bfd_size_type locsymcount;
10006 Elf_Internal_Shdr *symtab_hdr;
10007
10008 if (!is_ppc64_elf (ibfd))
10009 continue;
10010
10011 for (s = ibfd->sections; s != NULL; s = s->next)
10012 {
10013 struct ppc_dyn_relocs *p;
10014
10015 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10016 {
10017 if (!bfd_is_abs_section (p->sec)
10018 && bfd_is_abs_section (p->sec->output_section))
10019 {
10020 /* Input section has been discarded, either because
10021 it is a copy of a linkonce section or due to
10022 linker script /DISCARD/, so we'll be discarding
10023 the relocs too. */
10024 }
10025 else if (p->count != 0)
10026 {
10027 asection *srel = elf_section_data (p->sec)->sreloc;
10028 if (p->ifunc)
10029 srel = htab->elf.irelplt;
10030 srel->size += p->count * sizeof (Elf64_External_Rela);
10031 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10032 info->flags |= DF_TEXTREL;
10033 }
10034 }
10035 }
10036
10037 lgot_ents = elf_local_got_ents (ibfd);
10038 if (!lgot_ents)
10039 continue;
10040
10041 symtab_hdr = &elf_symtab_hdr (ibfd);
10042 locsymcount = symtab_hdr->sh_info;
10043 end_lgot_ents = lgot_ents + locsymcount;
10044 local_plt = (struct plt_entry **) end_lgot_ents;
10045 end_local_plt = local_plt + locsymcount;
10046 lgot_masks = (unsigned char *) end_local_plt;
10047 s = ppc64_elf_tdata (ibfd)->got;
10048 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10049 {
10050 struct got_entry **pent, *ent;
10051
10052 pent = lgot_ents;
10053 while ((ent = *pent) != NULL)
10054 if (ent->got.refcount > 0)
10055 {
10056 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10057 {
10058 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10059 *pent = ent->next;
10060 }
10061 else
10062 {
10063 unsigned int ent_size = 8;
10064 unsigned int rel_size = sizeof (Elf64_External_Rela);
10065
10066 ent->got.offset = s->size;
10067 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10068 {
10069 ent_size *= 2;
10070 rel_size *= 2;
10071 }
10072 s->size += ent_size;
10073 if ((*lgot_masks & PLT_IFUNC) != 0)
10074 {
10075 htab->elf.irelplt->size += rel_size;
10076 htab->got_reli_size += rel_size;
10077 }
10078 else if (bfd_link_pic (info))
10079 {
10080 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10081 srel->size += rel_size;
10082 }
10083 pent = &ent->next;
10084 }
10085 }
10086 else
10087 *pent = ent->next;
10088 }
10089
10090 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10091 for (; local_plt < end_local_plt; ++local_plt)
10092 {
10093 struct plt_entry *ent;
10094
10095 for (ent = *local_plt; ent != NULL; ent = ent->next)
10096 if (ent->plt.refcount > 0)
10097 {
10098 s = htab->elf.iplt;
10099 ent->plt.offset = s->size;
10100 s->size += PLT_ENTRY_SIZE (htab);
10101
10102 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10103 }
10104 else
10105 ent->plt.offset = (bfd_vma) -1;
10106 }
10107 }
10108
10109 /* Allocate global sym .plt and .got entries, and space for global
10110 sym dynamic relocs. */
10111 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10112 /* Stash the end of glink branch table. */
10113 if (htab->glink != NULL)
10114 htab->glink->rawsize = htab->glink->size;
10115
10116 if (!htab->opd_abi && !bfd_link_pic (info))
10117 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10118
10119 first_tlsld = NULL;
10120 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10121 {
10122 struct got_entry *ent;
10123
10124 if (!is_ppc64_elf (ibfd))
10125 continue;
10126
10127 ent = ppc64_tlsld_got (ibfd);
10128 if (ent->got.refcount > 0)
10129 {
10130 if (!htab->do_multi_toc && first_tlsld != NULL)
10131 {
10132 ent->is_indirect = TRUE;
10133 ent->got.ent = first_tlsld;
10134 }
10135 else
10136 {
10137 if (first_tlsld == NULL)
10138 first_tlsld = ent;
10139 s = ppc64_elf_tdata (ibfd)->got;
10140 ent->got.offset = s->size;
10141 ent->owner = ibfd;
10142 s->size += 16;
10143 if (bfd_link_pic (info))
10144 {
10145 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10146 srel->size += sizeof (Elf64_External_Rela);
10147 }
10148 }
10149 }
10150 else
10151 ent->got.offset = (bfd_vma) -1;
10152 }
10153
10154 /* We now have determined the sizes of the various dynamic sections.
10155 Allocate memory for them. */
10156 relocs = FALSE;
10157 for (s = dynobj->sections; s != NULL; s = s->next)
10158 {
10159 if ((s->flags & SEC_LINKER_CREATED) == 0)
10160 continue;
10161
10162 if (s == htab->brlt || s == htab->relbrlt)
10163 /* These haven't been allocated yet; don't strip. */
10164 continue;
10165 else if (s == htab->elf.sgot
10166 || s == htab->elf.splt
10167 || s == htab->elf.iplt
10168 || s == htab->glink
10169 || s == htab->dynbss)
10170 {
10171 /* Strip this section if we don't need it; see the
10172 comment below. */
10173 }
10174 else if (s == htab->glink_eh_frame)
10175 {
10176 if (!bfd_is_abs_section (s->output_section))
10177 /* Not sized yet. */
10178 continue;
10179 }
10180 else if (CONST_STRNEQ (s->name, ".rela"))
10181 {
10182 if (s->size != 0)
10183 {
10184 if (s != htab->elf.srelplt)
10185 relocs = TRUE;
10186
10187 /* We use the reloc_count field as a counter if we need
10188 to copy relocs into the output file. */
10189 s->reloc_count = 0;
10190 }
10191 }
10192 else
10193 {
10194 /* It's not one of our sections, so don't allocate space. */
10195 continue;
10196 }
10197
10198 if (s->size == 0)
10199 {
10200 /* If we don't need this section, strip it from the
10201 output file. This is mostly to handle .rela.bss and
10202 .rela.plt. We must create both sections in
10203 create_dynamic_sections, because they must be created
10204 before the linker maps input sections to output
10205 sections. The linker does that before
10206 adjust_dynamic_symbol is called, and it is that
10207 function which decides whether anything needs to go
10208 into these sections. */
10209 s->flags |= SEC_EXCLUDE;
10210 continue;
10211 }
10212
10213 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10214 continue;
10215
10216 /* Allocate memory for the section contents. We use bfd_zalloc
10217 here in case unused entries are not reclaimed before the
10218 section's contents are written out. This should not happen,
10219 but this way if it does we get a R_PPC64_NONE reloc in .rela
10220 sections instead of garbage.
10221 We also rely on the section contents being zero when writing
10222 the GOT. */
10223 s->contents = bfd_zalloc (dynobj, s->size);
10224 if (s->contents == NULL)
10225 return FALSE;
10226 }
10227
10228 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10229 {
10230 if (!is_ppc64_elf (ibfd))
10231 continue;
10232
10233 s = ppc64_elf_tdata (ibfd)->got;
10234 if (s != NULL && s != htab->elf.sgot)
10235 {
10236 if (s->size == 0)
10237 s->flags |= SEC_EXCLUDE;
10238 else
10239 {
10240 s->contents = bfd_zalloc (ibfd, s->size);
10241 if (s->contents == NULL)
10242 return FALSE;
10243 }
10244 }
10245 s = ppc64_elf_tdata (ibfd)->relgot;
10246 if (s != NULL)
10247 {
10248 if (s->size == 0)
10249 s->flags |= SEC_EXCLUDE;
10250 else
10251 {
10252 s->contents = bfd_zalloc (ibfd, s->size);
10253 if (s->contents == NULL)
10254 return FALSE;
10255 relocs = TRUE;
10256 s->reloc_count = 0;
10257 }
10258 }
10259 }
10260
10261 if (htab->elf.dynamic_sections_created)
10262 {
10263 bfd_boolean tls_opt;
10264
10265 /* Add some entries to the .dynamic section. We fill in the
10266 values later, in ppc64_elf_finish_dynamic_sections, but we
10267 must add the entries now so that we get the correct size for
10268 the .dynamic section. The DT_DEBUG entry is filled in by the
10269 dynamic linker and used by the debugger. */
10270 #define add_dynamic_entry(TAG, VAL) \
10271 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10272
10273 if (bfd_link_executable (info))
10274 {
10275 if (!add_dynamic_entry (DT_DEBUG, 0))
10276 return FALSE;
10277 }
10278
10279 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10280 {
10281 if (!add_dynamic_entry (DT_PLTGOT, 0)
10282 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10283 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10284 || !add_dynamic_entry (DT_JMPREL, 0)
10285 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10286 return FALSE;
10287 }
10288
10289 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10290 {
10291 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10292 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10293 return FALSE;
10294 }
10295
10296 tls_opt = (htab->params->tls_get_addr_opt
10297 && htab->tls_get_addr_fd != NULL
10298 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10299 if (tls_opt || !htab->opd_abi)
10300 {
10301 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10302 return FALSE;
10303 }
10304
10305 if (relocs)
10306 {
10307 if (!add_dynamic_entry (DT_RELA, 0)
10308 || !add_dynamic_entry (DT_RELASZ, 0)
10309 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10310 return FALSE;
10311
10312 /* If any dynamic relocs apply to a read-only section,
10313 then we need a DT_TEXTREL entry. */
10314 if ((info->flags & DF_TEXTREL) == 0)
10315 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10316
10317 if ((info->flags & DF_TEXTREL) != 0)
10318 {
10319 if (!add_dynamic_entry (DT_TEXTREL, 0))
10320 return FALSE;
10321 }
10322 }
10323 }
10324 #undef add_dynamic_entry
10325
10326 return TRUE;
10327 }
10328
10329 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10330
10331 static bfd_boolean
10332 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10333 {
10334 if (h->plt.plist != NULL
10335 && !h->def_regular
10336 && !h->pointer_equality_needed)
10337 return FALSE;
10338
10339 return _bfd_elf_hash_symbol (h);
10340 }
10341
10342 /* Determine the type of stub needed, if any, for a call. */
10343
10344 static inline enum ppc_stub_type
10345 ppc_type_of_stub (asection *input_sec,
10346 const Elf_Internal_Rela *rel,
10347 struct ppc_link_hash_entry **hash,
10348 struct plt_entry **plt_ent,
10349 bfd_vma destination,
10350 unsigned long local_off)
10351 {
10352 struct ppc_link_hash_entry *h = *hash;
10353 bfd_vma location;
10354 bfd_vma branch_offset;
10355 bfd_vma max_branch_offset;
10356 enum elf_ppc64_reloc_type r_type;
10357
10358 if (h != NULL)
10359 {
10360 struct plt_entry *ent;
10361 struct ppc_link_hash_entry *fdh = h;
10362 if (h->oh != NULL
10363 && h->oh->is_func_descriptor)
10364 {
10365 fdh = ppc_follow_link (h->oh);
10366 *hash = fdh;
10367 }
10368
10369 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10370 if (ent->addend == rel->r_addend
10371 && ent->plt.offset != (bfd_vma) -1)
10372 {
10373 *plt_ent = ent;
10374 return ppc_stub_plt_call;
10375 }
10376
10377 /* Here, we know we don't have a plt entry. If we don't have a
10378 either a defined function descriptor or a defined entry symbol
10379 in a regular object file, then it is pointless trying to make
10380 any other type of stub. */
10381 if (!is_static_defined (&fdh->elf)
10382 && !is_static_defined (&h->elf))
10383 return ppc_stub_none;
10384 }
10385 else if (elf_local_got_ents (input_sec->owner) != NULL)
10386 {
10387 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10388 struct plt_entry **local_plt = (struct plt_entry **)
10389 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10390 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10391
10392 if (local_plt[r_symndx] != NULL)
10393 {
10394 struct plt_entry *ent;
10395
10396 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10397 if (ent->addend == rel->r_addend
10398 && ent->plt.offset != (bfd_vma) -1)
10399 {
10400 *plt_ent = ent;
10401 return ppc_stub_plt_call;
10402 }
10403 }
10404 }
10405
10406 /* Determine where the call point is. */
10407 location = (input_sec->output_offset
10408 + input_sec->output_section->vma
10409 + rel->r_offset);
10410
10411 branch_offset = destination - location;
10412 r_type = ELF64_R_TYPE (rel->r_info);
10413
10414 /* Determine if a long branch stub is needed. */
10415 max_branch_offset = 1 << 25;
10416 if (r_type != R_PPC64_REL24)
10417 max_branch_offset = 1 << 15;
10418
10419 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10420 /* We need a stub. Figure out whether a long_branch or plt_branch
10421 is needed later. */
10422 return ppc_stub_long_branch;
10423
10424 return ppc_stub_none;
10425 }
10426
10427 /* With power7 weakly ordered memory model, it is possible for ld.so
10428 to update a plt entry in one thread and have another thread see a
10429 stale zero toc entry. To avoid this we need some sort of acquire
10430 barrier in the call stub. One solution is to make the load of the
10431 toc word seem to appear to depend on the load of the function entry
10432 word. Another solution is to test for r2 being zero, and branch to
10433 the appropriate glink entry if so.
10434
10435 . fake dep barrier compare
10436 . ld 12,xxx(2) ld 12,xxx(2)
10437 . mtctr 12 mtctr 12
10438 . xor 11,12,12 ld 2,xxx+8(2)
10439 . add 2,2,11 cmpldi 2,0
10440 . ld 2,xxx+8(2) bnectr+
10441 . bctr b <glink_entry>
10442
10443 The solution involving the compare turns out to be faster, so
10444 that's what we use unless the branch won't reach. */
10445
10446 #define ALWAYS_USE_FAKE_DEP 0
10447 #define ALWAYS_EMIT_R2SAVE 0
10448
10449 #define PPC_LO(v) ((v) & 0xffff)
10450 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10451 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10452
10453 static inline unsigned int
10454 plt_stub_size (struct ppc_link_hash_table *htab,
10455 struct ppc_stub_hash_entry *stub_entry,
10456 bfd_vma off)
10457 {
10458 unsigned size = 12;
10459
10460 if (ALWAYS_EMIT_R2SAVE
10461 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10462 size += 4;
10463 if (PPC_HA (off) != 0)
10464 size += 4;
10465 if (htab->opd_abi)
10466 {
10467 size += 4;
10468 if (htab->params->plt_static_chain)
10469 size += 4;
10470 if (htab->params->plt_thread_safe
10471 && htab->elf.dynamic_sections_created
10472 && stub_entry->h != NULL
10473 && stub_entry->h->elf.dynindx != -1)
10474 size += 8;
10475 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10476 size += 4;
10477 }
10478 if (stub_entry->h != NULL
10479 && (stub_entry->h == htab->tls_get_addr_fd
10480 || stub_entry->h == htab->tls_get_addr)
10481 && htab->params->tls_get_addr_opt)
10482 size += 13 * 4;
10483 return size;
10484 }
10485
10486 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10487 then return the padding needed to do so. */
10488 static inline unsigned int
10489 plt_stub_pad (struct ppc_link_hash_table *htab,
10490 struct ppc_stub_hash_entry *stub_entry,
10491 bfd_vma plt_off)
10492 {
10493 int stub_align = 1 << htab->params->plt_stub_align;
10494 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10495 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10496
10497 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10498 > ((stub_size - 1) & -stub_align))
10499 return stub_align - (stub_off & (stub_align - 1));
10500 return 0;
10501 }
10502
10503 /* Build a .plt call stub. */
10504
10505 static inline bfd_byte *
10506 build_plt_stub (struct ppc_link_hash_table *htab,
10507 struct ppc_stub_hash_entry *stub_entry,
10508 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10509 {
10510 bfd *obfd = htab->params->stub_bfd;
10511 bfd_boolean plt_load_toc = htab->opd_abi;
10512 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10513 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10514 && htab->elf.dynamic_sections_created
10515 && stub_entry->h != NULL
10516 && stub_entry->h->elf.dynindx != -1);
10517 bfd_boolean use_fake_dep = plt_thread_safe;
10518 bfd_vma cmp_branch_off = 0;
10519
10520 if (!ALWAYS_USE_FAKE_DEP
10521 && plt_load_toc
10522 && plt_thread_safe
10523 && !((stub_entry->h == htab->tls_get_addr_fd
10524 || stub_entry->h == htab->tls_get_addr)
10525 && htab->params->tls_get_addr_opt))
10526 {
10527 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10528 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10529 / PLT_ENTRY_SIZE (htab));
10530 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10531 bfd_vma to, from;
10532
10533 if (pltindex > 32768)
10534 glinkoff += (pltindex - 32768) * 4;
10535 to = (glinkoff
10536 + htab->glink->output_offset
10537 + htab->glink->output_section->vma);
10538 from = (p - stub_entry->group->stub_sec->contents
10539 + 4 * (ALWAYS_EMIT_R2SAVE
10540 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10541 + 4 * (PPC_HA (offset) != 0)
10542 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10543 != PPC_HA (offset))
10544 + 4 * (plt_static_chain != 0)
10545 + 20
10546 + stub_entry->group->stub_sec->output_offset
10547 + stub_entry->group->stub_sec->output_section->vma);
10548 cmp_branch_off = to - from;
10549 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10550 }
10551
10552 if (PPC_HA (offset) != 0)
10553 {
10554 if (r != NULL)
10555 {
10556 if (ALWAYS_EMIT_R2SAVE
10557 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10558 r[0].r_offset += 4;
10559 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10560 r[1].r_offset = r[0].r_offset + 4;
10561 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10562 r[1].r_addend = r[0].r_addend;
10563 if (plt_load_toc)
10564 {
10565 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10566 {
10567 r[2].r_offset = r[1].r_offset + 4;
10568 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10569 r[2].r_addend = r[0].r_addend;
10570 }
10571 else
10572 {
10573 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10574 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10575 r[2].r_addend = r[0].r_addend + 8;
10576 if (plt_static_chain)
10577 {
10578 r[3].r_offset = r[2].r_offset + 4;
10579 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10580 r[3].r_addend = r[0].r_addend + 16;
10581 }
10582 }
10583 }
10584 }
10585 if (ALWAYS_EMIT_R2SAVE
10586 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10587 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10588 if (plt_load_toc)
10589 {
10590 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10591 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10592 }
10593 else
10594 {
10595 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10596 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10597 }
10598 if (plt_load_toc
10599 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10600 {
10601 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10602 offset = 0;
10603 }
10604 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10605 if (plt_load_toc)
10606 {
10607 if (use_fake_dep)
10608 {
10609 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10610 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10611 }
10612 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10613 if (plt_static_chain)
10614 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10615 }
10616 }
10617 else
10618 {
10619 if (r != NULL)
10620 {
10621 if (ALWAYS_EMIT_R2SAVE
10622 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10623 r[0].r_offset += 4;
10624 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10625 if (plt_load_toc)
10626 {
10627 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10628 {
10629 r[1].r_offset = r[0].r_offset + 4;
10630 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10631 r[1].r_addend = r[0].r_addend;
10632 }
10633 else
10634 {
10635 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10636 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10637 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10638 if (plt_static_chain)
10639 {
10640 r[2].r_offset = r[1].r_offset + 4;
10641 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10642 r[2].r_addend = r[0].r_addend + 8;
10643 }
10644 }
10645 }
10646 }
10647 if (ALWAYS_EMIT_R2SAVE
10648 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10649 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10650 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10651 if (plt_load_toc
10652 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10653 {
10654 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10655 offset = 0;
10656 }
10657 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10658 if (plt_load_toc)
10659 {
10660 if (use_fake_dep)
10661 {
10662 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10663 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10664 }
10665 if (plt_static_chain)
10666 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10667 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10668 }
10669 }
10670 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10671 {
10672 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10673 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10674 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10675 }
10676 else
10677 bfd_put_32 (obfd, BCTR, p), p += 4;
10678 return p;
10679 }
10680
10681 /* Build a special .plt call stub for __tls_get_addr. */
10682
10683 #define LD_R11_0R3 0xe9630000
10684 #define LD_R12_0R3 0xe9830000
10685 #define MR_R0_R3 0x7c601b78
10686 #define CMPDI_R11_0 0x2c2b0000
10687 #define ADD_R3_R12_R13 0x7c6c6a14
10688 #define BEQLR 0x4d820020
10689 #define MR_R3_R0 0x7c030378
10690 #define STD_R11_0R1 0xf9610000
10691 #define BCTRL 0x4e800421
10692 #define LD_R11_0R1 0xe9610000
10693 #define MTLR_R11 0x7d6803a6
10694
10695 static inline bfd_byte *
10696 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10697 struct ppc_stub_hash_entry *stub_entry,
10698 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10699 {
10700 bfd *obfd = htab->params->stub_bfd;
10701
10702 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10703 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10704 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10705 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10706 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10707 bfd_put_32 (obfd, BEQLR, p), p += 4;
10708 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10709 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10710 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10711
10712 if (r != NULL)
10713 r[0].r_offset += 9 * 4;
10714 p = build_plt_stub (htab, stub_entry, p, offset, r);
10715 bfd_put_32 (obfd, BCTRL, p - 4);
10716
10717 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10718 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10719 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10720 bfd_put_32 (obfd, BLR, p), p += 4;
10721
10722 return p;
10723 }
10724
10725 static Elf_Internal_Rela *
10726 get_relocs (asection *sec, int count)
10727 {
10728 Elf_Internal_Rela *relocs;
10729 struct bfd_elf_section_data *elfsec_data;
10730
10731 elfsec_data = elf_section_data (sec);
10732 relocs = elfsec_data->relocs;
10733 if (relocs == NULL)
10734 {
10735 bfd_size_type relsize;
10736 relsize = sec->reloc_count * sizeof (*relocs);
10737 relocs = bfd_alloc (sec->owner, relsize);
10738 if (relocs == NULL)
10739 return NULL;
10740 elfsec_data->relocs = relocs;
10741 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10742 sizeof (Elf_Internal_Shdr));
10743 if (elfsec_data->rela.hdr == NULL)
10744 return NULL;
10745 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10746 * sizeof (Elf64_External_Rela));
10747 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10748 sec->reloc_count = 0;
10749 }
10750 relocs += sec->reloc_count;
10751 sec->reloc_count += count;
10752 return relocs;
10753 }
10754
10755 static bfd_vma
10756 get_r2off (struct bfd_link_info *info,
10757 struct ppc_stub_hash_entry *stub_entry)
10758 {
10759 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10760 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10761
10762 if (r2off == 0)
10763 {
10764 /* Support linking -R objects. Get the toc pointer from the
10765 opd entry. */
10766 char buf[8];
10767 if (!htab->opd_abi)
10768 return r2off;
10769 asection *opd = stub_entry->h->elf.root.u.def.section;
10770 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10771
10772 if (strcmp (opd->name, ".opd") != 0
10773 || opd->reloc_count != 0)
10774 {
10775 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10776 stub_entry->h->elf.root.root.string);
10777 bfd_set_error (bfd_error_bad_value);
10778 return (bfd_vma) -1;
10779 }
10780 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10781 return (bfd_vma) -1;
10782 r2off = bfd_get_64 (opd->owner, buf);
10783 r2off -= elf_gp (info->output_bfd);
10784 }
10785 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10786 return r2off;
10787 }
10788
10789 static bfd_boolean
10790 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10791 {
10792 struct ppc_stub_hash_entry *stub_entry;
10793 struct ppc_branch_hash_entry *br_entry;
10794 struct bfd_link_info *info;
10795 struct ppc_link_hash_table *htab;
10796 bfd_byte *loc;
10797 bfd_byte *p;
10798 bfd_vma dest, off;
10799 int size;
10800 Elf_Internal_Rela *r;
10801 asection *plt;
10802
10803 /* Massage our args to the form they really have. */
10804 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10805 info = in_arg;
10806
10807 htab = ppc_hash_table (info);
10808 if (htab == NULL)
10809 return FALSE;
10810
10811 /* Make a note of the offset within the stubs for this entry. */
10812 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10813 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10814
10815 htab->stub_count[stub_entry->stub_type - 1] += 1;
10816 switch (stub_entry->stub_type)
10817 {
10818 case ppc_stub_long_branch:
10819 case ppc_stub_long_branch_r2off:
10820 /* Branches are relative. This is where we are going to. */
10821 dest = (stub_entry->target_value
10822 + stub_entry->target_section->output_offset
10823 + stub_entry->target_section->output_section->vma);
10824 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10825 off = dest;
10826
10827 /* And this is where we are coming from. */
10828 off -= (stub_entry->stub_offset
10829 + stub_entry->group->stub_sec->output_offset
10830 + stub_entry->group->stub_sec->output_section->vma);
10831
10832 size = 4;
10833 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10834 {
10835 bfd_vma r2off = get_r2off (info, stub_entry);
10836
10837 if (r2off == (bfd_vma) -1)
10838 {
10839 htab->stub_error = TRUE;
10840 return FALSE;
10841 }
10842 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10843 loc += 4;
10844 size = 8;
10845 if (PPC_HA (r2off) != 0)
10846 {
10847 bfd_put_32 (htab->params->stub_bfd,
10848 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10849 loc += 4;
10850 size += 4;
10851 }
10852 if (PPC_LO (r2off) != 0)
10853 {
10854 bfd_put_32 (htab->params->stub_bfd,
10855 ADDI_R2_R2 | PPC_LO (r2off), loc);
10856 loc += 4;
10857 size += 4;
10858 }
10859 off -= size - 4;
10860 }
10861 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10862
10863 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10864 {
10865 info->callbacks->einfo
10866 (_("%P: long branch stub `%s' offset overflow\n"),
10867 stub_entry->root.string);
10868 htab->stub_error = TRUE;
10869 return FALSE;
10870 }
10871
10872 if (info->emitrelocations)
10873 {
10874 r = get_relocs (stub_entry->group->stub_sec, 1);
10875 if (r == NULL)
10876 return FALSE;
10877 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10878 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10879 r->r_addend = dest;
10880 if (stub_entry->h != NULL)
10881 {
10882 struct elf_link_hash_entry **hashes;
10883 unsigned long symndx;
10884 struct ppc_link_hash_entry *h;
10885
10886 hashes = elf_sym_hashes (htab->params->stub_bfd);
10887 if (hashes == NULL)
10888 {
10889 bfd_size_type hsize;
10890
10891 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10892 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10893 if (hashes == NULL)
10894 return FALSE;
10895 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10896 htab->stub_globals = 1;
10897 }
10898 symndx = htab->stub_globals++;
10899 h = stub_entry->h;
10900 hashes[symndx] = &h->elf;
10901 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10902 if (h->oh != NULL && h->oh->is_func)
10903 h = ppc_follow_link (h->oh);
10904 if (h->elf.root.u.def.section != stub_entry->target_section)
10905 /* H is an opd symbol. The addend must be zero. */
10906 r->r_addend = 0;
10907 else
10908 {
10909 off = (h->elf.root.u.def.value
10910 + h->elf.root.u.def.section->output_offset
10911 + h->elf.root.u.def.section->output_section->vma);
10912 r->r_addend -= off;
10913 }
10914 }
10915 }
10916 break;
10917
10918 case ppc_stub_plt_branch:
10919 case ppc_stub_plt_branch_r2off:
10920 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10921 stub_entry->root.string + 9,
10922 FALSE, FALSE);
10923 if (br_entry == NULL)
10924 {
10925 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10926 stub_entry->root.string);
10927 htab->stub_error = TRUE;
10928 return FALSE;
10929 }
10930
10931 dest = (stub_entry->target_value
10932 + stub_entry->target_section->output_offset
10933 + stub_entry->target_section->output_section->vma);
10934 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10935 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10936
10937 bfd_put_64 (htab->brlt->owner, dest,
10938 htab->brlt->contents + br_entry->offset);
10939
10940 if (br_entry->iter == htab->stub_iteration)
10941 {
10942 br_entry->iter = 0;
10943
10944 if (htab->relbrlt != NULL)
10945 {
10946 /* Create a reloc for the branch lookup table entry. */
10947 Elf_Internal_Rela rela;
10948 bfd_byte *rl;
10949
10950 rela.r_offset = (br_entry->offset
10951 + htab->brlt->output_offset
10952 + htab->brlt->output_section->vma);
10953 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10954 rela.r_addend = dest;
10955
10956 rl = htab->relbrlt->contents;
10957 rl += (htab->relbrlt->reloc_count++
10958 * sizeof (Elf64_External_Rela));
10959 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10960 }
10961 else if (info->emitrelocations)
10962 {
10963 r = get_relocs (htab->brlt, 1);
10964 if (r == NULL)
10965 return FALSE;
10966 /* brlt, being SEC_LINKER_CREATED does not go through the
10967 normal reloc processing. Symbols and offsets are not
10968 translated from input file to output file form, so
10969 set up the offset per the output file. */
10970 r->r_offset = (br_entry->offset
10971 + htab->brlt->output_offset
10972 + htab->brlt->output_section->vma);
10973 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10974 r->r_addend = dest;
10975 }
10976 }
10977
10978 dest = (br_entry->offset
10979 + htab->brlt->output_offset
10980 + htab->brlt->output_section->vma);
10981
10982 off = (dest
10983 - elf_gp (htab->brlt->output_section->owner)
10984 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10985
10986 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10987 {
10988 info->callbacks->einfo
10989 (_("%P: linkage table error against `%T'\n"),
10990 stub_entry->root.string);
10991 bfd_set_error (bfd_error_bad_value);
10992 htab->stub_error = TRUE;
10993 return FALSE;
10994 }
10995
10996 if (info->emitrelocations)
10997 {
10998 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10999 if (r == NULL)
11000 return FALSE;
11001 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11002 if (bfd_big_endian (info->output_bfd))
11003 r[0].r_offset += 2;
11004 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11005 r[0].r_offset += 4;
11006 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11007 r[0].r_addend = dest;
11008 if (PPC_HA (off) != 0)
11009 {
11010 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11011 r[1].r_offset = r[0].r_offset + 4;
11012 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11013 r[1].r_addend = r[0].r_addend;
11014 }
11015 }
11016
11017 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11018 {
11019 if (PPC_HA (off) != 0)
11020 {
11021 size = 16;
11022 bfd_put_32 (htab->params->stub_bfd,
11023 ADDIS_R12_R2 | PPC_HA (off), loc);
11024 loc += 4;
11025 bfd_put_32 (htab->params->stub_bfd,
11026 LD_R12_0R12 | PPC_LO (off), loc);
11027 }
11028 else
11029 {
11030 size = 12;
11031 bfd_put_32 (htab->params->stub_bfd,
11032 LD_R12_0R2 | PPC_LO (off), loc);
11033 }
11034 }
11035 else
11036 {
11037 bfd_vma r2off = get_r2off (info, stub_entry);
11038
11039 if (r2off == (bfd_vma) -1)
11040 {
11041 htab->stub_error = TRUE;
11042 return FALSE;
11043 }
11044
11045 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11046 loc += 4;
11047 size = 16;
11048 if (PPC_HA (off) != 0)
11049 {
11050 size += 4;
11051 bfd_put_32 (htab->params->stub_bfd,
11052 ADDIS_R12_R2 | PPC_HA (off), loc);
11053 loc += 4;
11054 bfd_put_32 (htab->params->stub_bfd,
11055 LD_R12_0R12 | PPC_LO (off), loc);
11056 }
11057 else
11058 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11059
11060 if (PPC_HA (r2off) != 0)
11061 {
11062 size += 4;
11063 loc += 4;
11064 bfd_put_32 (htab->params->stub_bfd,
11065 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11066 }
11067 if (PPC_LO (r2off) != 0)
11068 {
11069 size += 4;
11070 loc += 4;
11071 bfd_put_32 (htab->params->stub_bfd,
11072 ADDI_R2_R2 | PPC_LO (r2off), loc);
11073 }
11074 }
11075 loc += 4;
11076 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11077 loc += 4;
11078 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11079 break;
11080
11081 case ppc_stub_plt_call:
11082 case ppc_stub_plt_call_r2save:
11083 if (stub_entry->h != NULL
11084 && stub_entry->h->is_func_descriptor
11085 && stub_entry->h->oh != NULL)
11086 {
11087 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11088
11089 /* If the old-ABI "dot-symbol" is undefined make it weak so
11090 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11091 if (fh->elf.root.type == bfd_link_hash_undefined)
11092 fh->elf.root.type = bfd_link_hash_undefweak;
11093 /* Stop undo_symbol_twiddle changing it back to undefined. */
11094 fh->was_undefined = 0;
11095 }
11096
11097 /* Now build the stub. */
11098 dest = stub_entry->plt_ent->plt.offset & ~1;
11099 if (dest >= (bfd_vma) -2)
11100 abort ();
11101
11102 plt = htab->elf.splt;
11103 if (!htab->elf.dynamic_sections_created
11104 || stub_entry->h == NULL
11105 || stub_entry->h->elf.dynindx == -1)
11106 plt = htab->elf.iplt;
11107
11108 dest += plt->output_offset + plt->output_section->vma;
11109
11110 if (stub_entry->h == NULL
11111 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11112 {
11113 Elf_Internal_Rela rela;
11114 bfd_byte *rl;
11115
11116 rela.r_offset = dest;
11117 if (htab->opd_abi)
11118 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11119 else
11120 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11121 rela.r_addend = (stub_entry->target_value
11122 + stub_entry->target_section->output_offset
11123 + stub_entry->target_section->output_section->vma);
11124
11125 rl = (htab->elf.irelplt->contents
11126 + (htab->elf.irelplt->reloc_count++
11127 * sizeof (Elf64_External_Rela)));
11128 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11129 stub_entry->plt_ent->plt.offset |= 1;
11130 }
11131
11132 off = (dest
11133 - elf_gp (plt->output_section->owner)
11134 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11135
11136 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11137 {
11138 info->callbacks->einfo
11139 /* xgettext:c-format */
11140 (_("%P: linkage table error against `%T'\n"),
11141 stub_entry->h != NULL
11142 ? stub_entry->h->elf.root.root.string
11143 : "<local sym>");
11144 bfd_set_error (bfd_error_bad_value);
11145 htab->stub_error = TRUE;
11146 return FALSE;
11147 }
11148
11149 if (htab->params->plt_stub_align != 0)
11150 {
11151 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11152
11153 stub_entry->group->stub_sec->size += pad;
11154 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11155 loc += pad;
11156 }
11157
11158 r = NULL;
11159 if (info->emitrelocations)
11160 {
11161 r = get_relocs (stub_entry->group->stub_sec,
11162 ((PPC_HA (off) != 0)
11163 + (htab->opd_abi
11164 ? 2 + (htab->params->plt_static_chain
11165 && PPC_HA (off + 16) == PPC_HA (off))
11166 : 1)));
11167 if (r == NULL)
11168 return FALSE;
11169 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11170 if (bfd_big_endian (info->output_bfd))
11171 r[0].r_offset += 2;
11172 r[0].r_addend = dest;
11173 }
11174 if (stub_entry->h != NULL
11175 && (stub_entry->h == htab->tls_get_addr_fd
11176 || stub_entry->h == htab->tls_get_addr)
11177 && htab->params->tls_get_addr_opt)
11178 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11179 else
11180 p = build_plt_stub (htab, stub_entry, loc, off, r);
11181 size = p - loc;
11182 break;
11183
11184 case ppc_stub_save_res:
11185 return TRUE;
11186
11187 default:
11188 BFD_FAIL ();
11189 return FALSE;
11190 }
11191
11192 stub_entry->group->stub_sec->size += size;
11193
11194 if (htab->params->emit_stub_syms)
11195 {
11196 struct elf_link_hash_entry *h;
11197 size_t len1, len2;
11198 char *name;
11199 const char *const stub_str[] = { "long_branch",
11200 "long_branch_r2off",
11201 "plt_branch",
11202 "plt_branch_r2off",
11203 "plt_call",
11204 "plt_call" };
11205
11206 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11207 len2 = strlen (stub_entry->root.string);
11208 name = bfd_malloc (len1 + len2 + 2);
11209 if (name == NULL)
11210 return FALSE;
11211 memcpy (name, stub_entry->root.string, 9);
11212 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11213 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11214 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11215 if (h == NULL)
11216 return FALSE;
11217 if (h->root.type == bfd_link_hash_new)
11218 {
11219 h->root.type = bfd_link_hash_defined;
11220 h->root.u.def.section = stub_entry->group->stub_sec;
11221 h->root.u.def.value = stub_entry->stub_offset;
11222 h->ref_regular = 1;
11223 h->def_regular = 1;
11224 h->ref_regular_nonweak = 1;
11225 h->forced_local = 1;
11226 h->non_elf = 0;
11227 h->root.linker_def = 1;
11228 }
11229 }
11230
11231 return TRUE;
11232 }
11233
11234 /* As above, but don't actually build the stub. Just bump offset so
11235 we know stub section sizes, and select plt_branch stubs where
11236 long_branch stubs won't do. */
11237
11238 static bfd_boolean
11239 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11240 {
11241 struct ppc_stub_hash_entry *stub_entry;
11242 struct bfd_link_info *info;
11243 struct ppc_link_hash_table *htab;
11244 bfd_vma off;
11245 int size;
11246
11247 /* Massage our args to the form they really have. */
11248 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11249 info = in_arg;
11250
11251 htab = ppc_hash_table (info);
11252 if (htab == NULL)
11253 return FALSE;
11254
11255 if (stub_entry->h != NULL
11256 && stub_entry->h->save_res
11257 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11258 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11259 {
11260 /* Don't make stubs to out-of-line register save/restore
11261 functions. Instead, emit copies of the functions. */
11262 stub_entry->group->needs_save_res = 1;
11263 stub_entry->stub_type = ppc_stub_save_res;
11264 return TRUE;
11265 }
11266
11267 if (stub_entry->stub_type == ppc_stub_plt_call
11268 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11269 {
11270 asection *plt;
11271 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11272 if (off >= (bfd_vma) -2)
11273 abort ();
11274 plt = htab->elf.splt;
11275 if (!htab->elf.dynamic_sections_created
11276 || stub_entry->h == NULL
11277 || stub_entry->h->elf.dynindx == -1)
11278 plt = htab->elf.iplt;
11279 off += (plt->output_offset
11280 + plt->output_section->vma
11281 - elf_gp (plt->output_section->owner)
11282 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11283
11284 size = plt_stub_size (htab, stub_entry, off);
11285 if (htab->params->plt_stub_align)
11286 size += plt_stub_pad (htab, stub_entry, off);
11287 if (info->emitrelocations)
11288 {
11289 stub_entry->group->stub_sec->reloc_count
11290 += ((PPC_HA (off) != 0)
11291 + (htab->opd_abi
11292 ? 2 + (htab->params->plt_static_chain
11293 && PPC_HA (off + 16) == PPC_HA (off))
11294 : 1));
11295 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11296 }
11297 }
11298 else
11299 {
11300 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11301 variants. */
11302 bfd_vma r2off = 0;
11303 bfd_vma local_off = 0;
11304
11305 off = (stub_entry->target_value
11306 + stub_entry->target_section->output_offset
11307 + stub_entry->target_section->output_section->vma);
11308 off -= (stub_entry->group->stub_sec->size
11309 + stub_entry->group->stub_sec->output_offset
11310 + stub_entry->group->stub_sec->output_section->vma);
11311
11312 /* Reset the stub type from the plt variant in case we now
11313 can reach with a shorter stub. */
11314 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11315 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11316
11317 size = 4;
11318 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11319 {
11320 r2off = get_r2off (info, stub_entry);
11321 if (r2off == (bfd_vma) -1)
11322 {
11323 htab->stub_error = TRUE;
11324 return FALSE;
11325 }
11326 size = 8;
11327 if (PPC_HA (r2off) != 0)
11328 size += 4;
11329 if (PPC_LO (r2off) != 0)
11330 size += 4;
11331 off -= size - 4;
11332 }
11333
11334 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11335
11336 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11337 Do the same for -R objects without function descriptors. */
11338 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11339 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11340 && r2off == 0
11341 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11342 {
11343 struct ppc_branch_hash_entry *br_entry;
11344
11345 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11346 stub_entry->root.string + 9,
11347 TRUE, FALSE);
11348 if (br_entry == NULL)
11349 {
11350 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11351 stub_entry->root.string);
11352 htab->stub_error = TRUE;
11353 return FALSE;
11354 }
11355
11356 if (br_entry->iter != htab->stub_iteration)
11357 {
11358 br_entry->iter = htab->stub_iteration;
11359 br_entry->offset = htab->brlt->size;
11360 htab->brlt->size += 8;
11361
11362 if (htab->relbrlt != NULL)
11363 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11364 else if (info->emitrelocations)
11365 {
11366 htab->brlt->reloc_count += 1;
11367 htab->brlt->flags |= SEC_RELOC;
11368 }
11369 }
11370
11371 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11372 off = (br_entry->offset
11373 + htab->brlt->output_offset
11374 + htab->brlt->output_section->vma
11375 - elf_gp (htab->brlt->output_section->owner)
11376 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11377
11378 if (info->emitrelocations)
11379 {
11380 stub_entry->group->stub_sec->reloc_count
11381 += 1 + (PPC_HA (off) != 0);
11382 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11383 }
11384
11385 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11386 {
11387 size = 12;
11388 if (PPC_HA (off) != 0)
11389 size = 16;
11390 }
11391 else
11392 {
11393 size = 16;
11394 if (PPC_HA (off) != 0)
11395 size += 4;
11396
11397 if (PPC_HA (r2off) != 0)
11398 size += 4;
11399 if (PPC_LO (r2off) != 0)
11400 size += 4;
11401 }
11402 }
11403 else if (info->emitrelocations)
11404 {
11405 stub_entry->group->stub_sec->reloc_count += 1;
11406 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11407 }
11408 }
11409
11410 stub_entry->group->stub_sec->size += size;
11411 return TRUE;
11412 }
11413
11414 /* Set up various things so that we can make a list of input sections
11415 for each output section included in the link. Returns -1 on error,
11416 0 when no stubs will be needed, and 1 on success. */
11417
11418 int
11419 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11420 {
11421 unsigned int id;
11422 bfd_size_type amt;
11423 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11424
11425 if (htab == NULL)
11426 return -1;
11427
11428 htab->sec_info_arr_size = bfd_get_next_section_id ();
11429 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11430 htab->sec_info = bfd_zmalloc (amt);
11431 if (htab->sec_info == NULL)
11432 return -1;
11433
11434 /* Set toc_off for com, und, abs and ind sections. */
11435 for (id = 0; id < 3; id++)
11436 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11437
11438 return 1;
11439 }
11440
11441 /* Set up for first pass at multitoc partitioning. */
11442
11443 void
11444 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11445 {
11446 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11447
11448 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11449 htab->toc_bfd = NULL;
11450 htab->toc_first_sec = NULL;
11451 }
11452
11453 /* The linker repeatedly calls this function for each TOC input section
11454 and linker generated GOT section. Group input bfds such that the toc
11455 within a group is less than 64k in size. */
11456
11457 bfd_boolean
11458 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11459 {
11460 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11461 bfd_vma addr, off, limit;
11462
11463 if (htab == NULL)
11464 return FALSE;
11465
11466 if (!htab->second_toc_pass)
11467 {
11468 /* Keep track of the first .toc or .got section for this input bfd. */
11469 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11470
11471 if (new_bfd)
11472 {
11473 htab->toc_bfd = isec->owner;
11474 htab->toc_first_sec = isec;
11475 }
11476
11477 addr = isec->output_offset + isec->output_section->vma;
11478 off = addr - htab->toc_curr;
11479 limit = 0x80008000;
11480 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11481 limit = 0x10000;
11482 if (off + isec->size > limit)
11483 {
11484 addr = (htab->toc_first_sec->output_offset
11485 + htab->toc_first_sec->output_section->vma);
11486 htab->toc_curr = addr;
11487 htab->toc_curr &= -TOC_BASE_ALIGN;
11488 }
11489
11490 /* toc_curr is the base address of this toc group. Set elf_gp
11491 for the input section to be the offset relative to the
11492 output toc base plus 0x8000. Making the input elf_gp an
11493 offset allows us to move the toc as a whole without
11494 recalculating input elf_gp. */
11495 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11496 off += TOC_BASE_OFF;
11497
11498 /* Die if someone uses a linker script that doesn't keep input
11499 file .toc and .got together. */
11500 if (new_bfd
11501 && elf_gp (isec->owner) != 0
11502 && elf_gp (isec->owner) != off)
11503 return FALSE;
11504
11505 elf_gp (isec->owner) = off;
11506 return TRUE;
11507 }
11508
11509 /* During the second pass toc_first_sec points to the start of
11510 a toc group, and toc_curr is used to track the old elf_gp.
11511 We use toc_bfd to ensure we only look at each bfd once. */
11512 if (htab->toc_bfd == isec->owner)
11513 return TRUE;
11514 htab->toc_bfd = isec->owner;
11515
11516 if (htab->toc_first_sec == NULL
11517 || htab->toc_curr != elf_gp (isec->owner))
11518 {
11519 htab->toc_curr = elf_gp (isec->owner);
11520 htab->toc_first_sec = isec;
11521 }
11522 addr = (htab->toc_first_sec->output_offset
11523 + htab->toc_first_sec->output_section->vma);
11524 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11525 elf_gp (isec->owner) = off;
11526
11527 return TRUE;
11528 }
11529
11530 /* Called via elf_link_hash_traverse to merge GOT entries for global
11531 symbol H. */
11532
11533 static bfd_boolean
11534 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11535 {
11536 if (h->root.type == bfd_link_hash_indirect)
11537 return TRUE;
11538
11539 merge_got_entries (&h->got.glist);
11540
11541 return TRUE;
11542 }
11543
11544 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11545 symbol H. */
11546
11547 static bfd_boolean
11548 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11549 {
11550 struct got_entry *gent;
11551
11552 if (h->root.type == bfd_link_hash_indirect)
11553 return TRUE;
11554
11555 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11556 if (!gent->is_indirect)
11557 allocate_got (h, (struct bfd_link_info *) inf, gent);
11558 return TRUE;
11559 }
11560
11561 /* Called on the first multitoc pass after the last call to
11562 ppc64_elf_next_toc_section. This function removes duplicate GOT
11563 entries. */
11564
11565 bfd_boolean
11566 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11567 {
11568 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11569 struct bfd *ibfd, *ibfd2;
11570 bfd_boolean done_something;
11571
11572 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11573
11574 if (!htab->do_multi_toc)
11575 return FALSE;
11576
11577 /* Merge global sym got entries within a toc group. */
11578 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11579
11580 /* And tlsld_got. */
11581 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11582 {
11583 struct got_entry *ent, *ent2;
11584
11585 if (!is_ppc64_elf (ibfd))
11586 continue;
11587
11588 ent = ppc64_tlsld_got (ibfd);
11589 if (!ent->is_indirect
11590 && ent->got.offset != (bfd_vma) -1)
11591 {
11592 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11593 {
11594 if (!is_ppc64_elf (ibfd2))
11595 continue;
11596
11597 ent2 = ppc64_tlsld_got (ibfd2);
11598 if (!ent2->is_indirect
11599 && ent2->got.offset != (bfd_vma) -1
11600 && elf_gp (ibfd2) == elf_gp (ibfd))
11601 {
11602 ent2->is_indirect = TRUE;
11603 ent2->got.ent = ent;
11604 }
11605 }
11606 }
11607 }
11608
11609 /* Zap sizes of got sections. */
11610 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11611 htab->elf.irelplt->size -= htab->got_reli_size;
11612 htab->got_reli_size = 0;
11613
11614 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11615 {
11616 asection *got, *relgot;
11617
11618 if (!is_ppc64_elf (ibfd))
11619 continue;
11620
11621 got = ppc64_elf_tdata (ibfd)->got;
11622 if (got != NULL)
11623 {
11624 got->rawsize = got->size;
11625 got->size = 0;
11626 relgot = ppc64_elf_tdata (ibfd)->relgot;
11627 relgot->rawsize = relgot->size;
11628 relgot->size = 0;
11629 }
11630 }
11631
11632 /* Now reallocate the got, local syms first. We don't need to
11633 allocate section contents again since we never increase size. */
11634 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11635 {
11636 struct got_entry **lgot_ents;
11637 struct got_entry **end_lgot_ents;
11638 struct plt_entry **local_plt;
11639 struct plt_entry **end_local_plt;
11640 unsigned char *lgot_masks;
11641 bfd_size_type locsymcount;
11642 Elf_Internal_Shdr *symtab_hdr;
11643 asection *s;
11644
11645 if (!is_ppc64_elf (ibfd))
11646 continue;
11647
11648 lgot_ents = elf_local_got_ents (ibfd);
11649 if (!lgot_ents)
11650 continue;
11651
11652 symtab_hdr = &elf_symtab_hdr (ibfd);
11653 locsymcount = symtab_hdr->sh_info;
11654 end_lgot_ents = lgot_ents + locsymcount;
11655 local_plt = (struct plt_entry **) end_lgot_ents;
11656 end_local_plt = local_plt + locsymcount;
11657 lgot_masks = (unsigned char *) end_local_plt;
11658 s = ppc64_elf_tdata (ibfd)->got;
11659 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11660 {
11661 struct got_entry *ent;
11662
11663 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11664 {
11665 unsigned int ent_size = 8;
11666 unsigned int rel_size = sizeof (Elf64_External_Rela);
11667
11668 ent->got.offset = s->size;
11669 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11670 {
11671 ent_size *= 2;
11672 rel_size *= 2;
11673 }
11674 s->size += ent_size;
11675 if ((*lgot_masks & PLT_IFUNC) != 0)
11676 {
11677 htab->elf.irelplt->size += rel_size;
11678 htab->got_reli_size += rel_size;
11679 }
11680 else if (bfd_link_pic (info))
11681 {
11682 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11683 srel->size += rel_size;
11684 }
11685 }
11686 }
11687 }
11688
11689 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11690
11691 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11692 {
11693 struct got_entry *ent;
11694
11695 if (!is_ppc64_elf (ibfd))
11696 continue;
11697
11698 ent = ppc64_tlsld_got (ibfd);
11699 if (!ent->is_indirect
11700 && ent->got.offset != (bfd_vma) -1)
11701 {
11702 asection *s = ppc64_elf_tdata (ibfd)->got;
11703 ent->got.offset = s->size;
11704 s->size += 16;
11705 if (bfd_link_pic (info))
11706 {
11707 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11708 srel->size += sizeof (Elf64_External_Rela);
11709 }
11710 }
11711 }
11712
11713 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11714 if (!done_something)
11715 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11716 {
11717 asection *got;
11718
11719 if (!is_ppc64_elf (ibfd))
11720 continue;
11721
11722 got = ppc64_elf_tdata (ibfd)->got;
11723 if (got != NULL)
11724 {
11725 done_something = got->rawsize != got->size;
11726 if (done_something)
11727 break;
11728 }
11729 }
11730
11731 if (done_something)
11732 (*htab->params->layout_sections_again) ();
11733
11734 /* Set up for second pass over toc sections to recalculate elf_gp
11735 on input sections. */
11736 htab->toc_bfd = NULL;
11737 htab->toc_first_sec = NULL;
11738 htab->second_toc_pass = TRUE;
11739 return done_something;
11740 }
11741
11742 /* Called after second pass of multitoc partitioning. */
11743
11744 void
11745 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11746 {
11747 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11748
11749 /* After the second pass, toc_curr tracks the TOC offset used
11750 for code sections below in ppc64_elf_next_input_section. */
11751 htab->toc_curr = TOC_BASE_OFF;
11752 }
11753
11754 /* No toc references were found in ISEC. If the code in ISEC makes no
11755 calls, then there's no need to use toc adjusting stubs when branching
11756 into ISEC. Actually, indirect calls from ISEC are OK as they will
11757 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11758 needed, and 2 if a cyclical call-graph was found but no other reason
11759 for a stub was detected. If called from the top level, a return of
11760 2 means the same as a return of 0. */
11761
11762 static int
11763 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11764 {
11765 int ret;
11766
11767 /* Mark this section as checked. */
11768 isec->call_check_done = 1;
11769
11770 /* We know none of our code bearing sections will need toc stubs. */
11771 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11772 return 0;
11773
11774 if (isec->size == 0)
11775 return 0;
11776
11777 if (isec->output_section == NULL)
11778 return 0;
11779
11780 ret = 0;
11781 if (isec->reloc_count != 0)
11782 {
11783 Elf_Internal_Rela *relstart, *rel;
11784 Elf_Internal_Sym *local_syms;
11785 struct ppc_link_hash_table *htab;
11786
11787 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11788 info->keep_memory);
11789 if (relstart == NULL)
11790 return -1;
11791
11792 /* Look for branches to outside of this section. */
11793 local_syms = NULL;
11794 htab = ppc_hash_table (info);
11795 if (htab == NULL)
11796 return -1;
11797
11798 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11799 {
11800 enum elf_ppc64_reloc_type r_type;
11801 unsigned long r_symndx;
11802 struct elf_link_hash_entry *h;
11803 struct ppc_link_hash_entry *eh;
11804 Elf_Internal_Sym *sym;
11805 asection *sym_sec;
11806 struct _opd_sec_data *opd;
11807 bfd_vma sym_value;
11808 bfd_vma dest;
11809
11810 r_type = ELF64_R_TYPE (rel->r_info);
11811 if (r_type != R_PPC64_REL24
11812 && r_type != R_PPC64_REL14
11813 && r_type != R_PPC64_REL14_BRTAKEN
11814 && r_type != R_PPC64_REL14_BRNTAKEN)
11815 continue;
11816
11817 r_symndx = ELF64_R_SYM (rel->r_info);
11818 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11819 isec->owner))
11820 {
11821 ret = -1;
11822 break;
11823 }
11824
11825 /* Calls to dynamic lib functions go through a plt call stub
11826 that uses r2. */
11827 eh = (struct ppc_link_hash_entry *) h;
11828 if (eh != NULL
11829 && (eh->elf.plt.plist != NULL
11830 || (eh->oh != NULL
11831 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11832 {
11833 ret = 1;
11834 break;
11835 }
11836
11837 if (sym_sec == NULL)
11838 /* Ignore other undefined symbols. */
11839 continue;
11840
11841 /* Assume branches to other sections not included in the
11842 link need stubs too, to cover -R and absolute syms. */
11843 if (sym_sec->output_section == NULL)
11844 {
11845 ret = 1;
11846 break;
11847 }
11848
11849 if (h == NULL)
11850 sym_value = sym->st_value;
11851 else
11852 {
11853 if (h->root.type != bfd_link_hash_defined
11854 && h->root.type != bfd_link_hash_defweak)
11855 abort ();
11856 sym_value = h->root.u.def.value;
11857 }
11858 sym_value += rel->r_addend;
11859
11860 /* If this branch reloc uses an opd sym, find the code section. */
11861 opd = get_opd_info (sym_sec);
11862 if (opd != NULL)
11863 {
11864 if (h == NULL && opd->adjust != NULL)
11865 {
11866 long adjust;
11867
11868 adjust = opd->adjust[OPD_NDX (sym_value)];
11869 if (adjust == -1)
11870 /* Assume deleted functions won't ever be called. */
11871 continue;
11872 sym_value += adjust;
11873 }
11874
11875 dest = opd_entry_value (sym_sec, sym_value,
11876 &sym_sec, NULL, FALSE);
11877 if (dest == (bfd_vma) -1)
11878 continue;
11879 }
11880 else
11881 dest = (sym_value
11882 + sym_sec->output_offset
11883 + sym_sec->output_section->vma);
11884
11885 /* Ignore branch to self. */
11886 if (sym_sec == isec)
11887 continue;
11888
11889 /* If the called function uses the toc, we need a stub. */
11890 if (sym_sec->has_toc_reloc
11891 || sym_sec->makes_toc_func_call)
11892 {
11893 ret = 1;
11894 break;
11895 }
11896
11897 /* Assume any branch that needs a long branch stub might in fact
11898 need a plt_branch stub. A plt_branch stub uses r2. */
11899 else if (dest - (isec->output_offset
11900 + isec->output_section->vma
11901 + rel->r_offset) + (1 << 25)
11902 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11903 ? h->other
11904 : sym->st_other))
11905 {
11906 ret = 1;
11907 break;
11908 }
11909
11910 /* If calling back to a section in the process of being
11911 tested, we can't say for sure that no toc adjusting stubs
11912 are needed, so don't return zero. */
11913 else if (sym_sec->call_check_in_progress)
11914 ret = 2;
11915
11916 /* Branches to another section that itself doesn't have any TOC
11917 references are OK. Recursively call ourselves to check. */
11918 else if (!sym_sec->call_check_done)
11919 {
11920 int recur;
11921
11922 /* Mark current section as indeterminate, so that other
11923 sections that call back to current won't be marked as
11924 known. */
11925 isec->call_check_in_progress = 1;
11926 recur = toc_adjusting_stub_needed (info, sym_sec);
11927 isec->call_check_in_progress = 0;
11928
11929 if (recur != 0)
11930 {
11931 ret = recur;
11932 if (recur != 2)
11933 break;
11934 }
11935 }
11936 }
11937
11938 if (local_syms != NULL
11939 && (elf_symtab_hdr (isec->owner).contents
11940 != (unsigned char *) local_syms))
11941 free (local_syms);
11942 if (elf_section_data (isec)->relocs != relstart)
11943 free (relstart);
11944 }
11945
11946 if ((ret & 1) == 0
11947 && isec->map_head.s != NULL
11948 && (strcmp (isec->output_section->name, ".init") == 0
11949 || strcmp (isec->output_section->name, ".fini") == 0))
11950 {
11951 if (isec->map_head.s->has_toc_reloc
11952 || isec->map_head.s->makes_toc_func_call)
11953 ret = 1;
11954 else if (!isec->map_head.s->call_check_done)
11955 {
11956 int recur;
11957 isec->call_check_in_progress = 1;
11958 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11959 isec->call_check_in_progress = 0;
11960 if (recur != 0)
11961 ret = recur;
11962 }
11963 }
11964
11965 if (ret == 1)
11966 isec->makes_toc_func_call = 1;
11967
11968 return ret;
11969 }
11970
11971 /* The linker repeatedly calls this function for each input section,
11972 in the order that input sections are linked into output sections.
11973 Build lists of input sections to determine groupings between which
11974 we may insert linker stubs. */
11975
11976 bfd_boolean
11977 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11978 {
11979 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11980
11981 if (htab == NULL)
11982 return FALSE;
11983
11984 if ((isec->output_section->flags & SEC_CODE) != 0
11985 && isec->output_section->id < htab->sec_info_arr_size)
11986 {
11987 /* This happens to make the list in reverse order,
11988 which is what we want. */
11989 htab->sec_info[isec->id].u.list
11990 = htab->sec_info[isec->output_section->id].u.list;
11991 htab->sec_info[isec->output_section->id].u.list = isec;
11992 }
11993
11994 if (htab->multi_toc_needed)
11995 {
11996 /* Analyse sections that aren't already flagged as needing a
11997 valid toc pointer. Exclude .fixup for the linux kernel.
11998 .fixup contains branches, but only back to the function that
11999 hit an exception. */
12000 if (!(isec->has_toc_reloc
12001 || (isec->flags & SEC_CODE) == 0
12002 || strcmp (isec->name, ".fixup") == 0
12003 || isec->call_check_done))
12004 {
12005 if (toc_adjusting_stub_needed (info, isec) < 0)
12006 return FALSE;
12007 }
12008 /* Make all sections use the TOC assigned for this object file.
12009 This will be wrong for pasted sections; We fix that in
12010 check_pasted_section(). */
12011 if (elf_gp (isec->owner) != 0)
12012 htab->toc_curr = elf_gp (isec->owner);
12013 }
12014
12015 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12016 return TRUE;
12017 }
12018
12019 /* Check that all .init and .fini sections use the same toc, if they
12020 have toc relocs. */
12021
12022 static bfd_boolean
12023 check_pasted_section (struct bfd_link_info *info, const char *name)
12024 {
12025 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12026
12027 if (o != NULL)
12028 {
12029 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12030 bfd_vma toc_off = 0;
12031 asection *i;
12032
12033 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12034 if (i->has_toc_reloc)
12035 {
12036 if (toc_off == 0)
12037 toc_off = htab->sec_info[i->id].toc_off;
12038 else if (toc_off != htab->sec_info[i->id].toc_off)
12039 return FALSE;
12040 }
12041
12042 if (toc_off == 0)
12043 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12044 if (i->makes_toc_func_call)
12045 {
12046 toc_off = htab->sec_info[i->id].toc_off;
12047 break;
12048 }
12049
12050 /* Make sure the whole pasted function uses the same toc offset. */
12051 if (toc_off != 0)
12052 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12053 htab->sec_info[i->id].toc_off = toc_off;
12054 }
12055 return TRUE;
12056 }
12057
12058 bfd_boolean
12059 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12060 {
12061 return (check_pasted_section (info, ".init")
12062 & check_pasted_section (info, ".fini"));
12063 }
12064
12065 /* See whether we can group stub sections together. Grouping stub
12066 sections may result in fewer stubs. More importantly, we need to
12067 put all .init* and .fini* stubs at the beginning of the .init or
12068 .fini output sections respectively, because glibc splits the
12069 _init and _fini functions into multiple parts. Putting a stub in
12070 the middle of a function is not a good idea. */
12071
12072 static bfd_boolean
12073 group_sections (struct bfd_link_info *info,
12074 bfd_size_type stub_group_size,
12075 bfd_boolean stubs_always_before_branch)
12076 {
12077 struct ppc_link_hash_table *htab;
12078 asection *osec;
12079 bfd_boolean suppress_size_errors;
12080
12081 htab = ppc_hash_table (info);
12082 if (htab == NULL)
12083 return FALSE;
12084
12085 suppress_size_errors = FALSE;
12086 if (stub_group_size == 1)
12087 {
12088 /* Default values. */
12089 if (stubs_always_before_branch)
12090 stub_group_size = 0x1e00000;
12091 else
12092 stub_group_size = 0x1c00000;
12093 suppress_size_errors = TRUE;
12094 }
12095
12096 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12097 {
12098 asection *tail;
12099
12100 if (osec->id >= htab->sec_info_arr_size)
12101 continue;
12102
12103 tail = htab->sec_info[osec->id].u.list;
12104 while (tail != NULL)
12105 {
12106 asection *curr;
12107 asection *prev;
12108 bfd_size_type total;
12109 bfd_boolean big_sec;
12110 bfd_vma curr_toc;
12111 struct map_stub *group;
12112 bfd_size_type group_size;
12113
12114 curr = tail;
12115 total = tail->size;
12116 group_size = (ppc64_elf_section_data (tail) != NULL
12117 && ppc64_elf_section_data (tail)->has_14bit_branch
12118 ? stub_group_size >> 10 : stub_group_size);
12119
12120 big_sec = total > group_size;
12121 if (big_sec && !suppress_size_errors)
12122 /* xgettext:c-format */
12123 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12124 tail->owner, tail);
12125 curr_toc = htab->sec_info[tail->id].toc_off;
12126
12127 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12128 && ((total += curr->output_offset - prev->output_offset)
12129 < (ppc64_elf_section_data (prev) != NULL
12130 && ppc64_elf_section_data (prev)->has_14bit_branch
12131 ? (group_size = stub_group_size >> 10) : group_size))
12132 && htab->sec_info[prev->id].toc_off == curr_toc)
12133 curr = prev;
12134
12135 /* OK, the size from the start of CURR to the end is less
12136 than group_size and thus can be handled by one stub
12137 section. (or the tail section is itself larger than
12138 group_size, in which case we may be toast.) We should
12139 really be keeping track of the total size of stubs added
12140 here, as stubs contribute to the final output section
12141 size. That's a little tricky, and this way will only
12142 break if stubs added make the total size more than 2^25,
12143 ie. for the default stub_group_size, if stubs total more
12144 than 2097152 bytes, or nearly 75000 plt call stubs. */
12145 group = bfd_alloc (curr->owner, sizeof (*group));
12146 if (group == NULL)
12147 return FALSE;
12148 group->link_sec = curr;
12149 group->stub_sec = NULL;
12150 group->needs_save_res = 0;
12151 group->next = htab->group;
12152 htab->group = group;
12153 do
12154 {
12155 prev = htab->sec_info[tail->id].u.list;
12156 /* Set up this stub group. */
12157 htab->sec_info[tail->id].u.group = group;
12158 }
12159 while (tail != curr && (tail = prev) != NULL);
12160
12161 /* But wait, there's more! Input sections up to group_size
12162 bytes before the stub section can be handled by it too.
12163 Don't do this if we have a really large section after the
12164 stubs, as adding more stubs increases the chance that
12165 branches may not reach into the stub section. */
12166 if (!stubs_always_before_branch && !big_sec)
12167 {
12168 total = 0;
12169 while (prev != NULL
12170 && ((total += tail->output_offset - prev->output_offset)
12171 < (ppc64_elf_section_data (prev) != NULL
12172 && ppc64_elf_section_data (prev)->has_14bit_branch
12173 ? (group_size = stub_group_size >> 10) : group_size))
12174 && htab->sec_info[prev->id].toc_off == curr_toc)
12175 {
12176 tail = prev;
12177 prev = htab->sec_info[tail->id].u.list;
12178 htab->sec_info[tail->id].u.group = group;
12179 }
12180 }
12181 tail = prev;
12182 }
12183 }
12184 return TRUE;
12185 }
12186
12187 static const unsigned char glink_eh_frame_cie[] =
12188 {
12189 0, 0, 0, 16, /* length. */
12190 0, 0, 0, 0, /* id. */
12191 1, /* CIE version. */
12192 'z', 'R', 0, /* Augmentation string. */
12193 4, /* Code alignment. */
12194 0x78, /* Data alignment. */
12195 65, /* RA reg. */
12196 1, /* Augmentation size. */
12197 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12198 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12199 0, 0, 0, 0
12200 };
12201
12202 /* Stripping output sections is normally done before dynamic section
12203 symbols have been allocated. This function is called later, and
12204 handles cases like htab->brlt which is mapped to its own output
12205 section. */
12206
12207 static void
12208 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12209 {
12210 if (isec->size == 0
12211 && isec->output_section->size == 0
12212 && !(isec->output_section->flags & SEC_KEEP)
12213 && !bfd_section_removed_from_list (info->output_bfd,
12214 isec->output_section)
12215 && elf_section_data (isec->output_section)->dynindx == 0)
12216 {
12217 isec->output_section->flags |= SEC_EXCLUDE;
12218 bfd_section_list_remove (info->output_bfd, isec->output_section);
12219 info->output_bfd->section_count--;
12220 }
12221 }
12222
12223 /* Determine and set the size of the stub section for a final link.
12224
12225 The basic idea here is to examine all the relocations looking for
12226 PC-relative calls to a target that is unreachable with a "bl"
12227 instruction. */
12228
12229 bfd_boolean
12230 ppc64_elf_size_stubs (struct bfd_link_info *info)
12231 {
12232 bfd_size_type stub_group_size;
12233 bfd_boolean stubs_always_before_branch;
12234 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12235
12236 if (htab == NULL)
12237 return FALSE;
12238
12239 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12240 htab->params->plt_thread_safe = 1;
12241 if (!htab->opd_abi)
12242 htab->params->plt_thread_safe = 0;
12243 else if (htab->params->plt_thread_safe == -1)
12244 {
12245 static const char *const thread_starter[] =
12246 {
12247 "pthread_create",
12248 /* libstdc++ */
12249 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12250 /* librt */
12251 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12252 "mq_notify", "create_timer",
12253 /* libanl */
12254 "getaddrinfo_a",
12255 /* libgomp */
12256 "GOMP_parallel",
12257 "GOMP_parallel_start",
12258 "GOMP_parallel_loop_static",
12259 "GOMP_parallel_loop_static_start",
12260 "GOMP_parallel_loop_dynamic",
12261 "GOMP_parallel_loop_dynamic_start",
12262 "GOMP_parallel_loop_guided",
12263 "GOMP_parallel_loop_guided_start",
12264 "GOMP_parallel_loop_runtime",
12265 "GOMP_parallel_loop_runtime_start",
12266 "GOMP_parallel_sections",
12267 "GOMP_parallel_sections_start",
12268 /* libgo */
12269 "__go_go",
12270 };
12271 unsigned i;
12272
12273 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12274 {
12275 struct elf_link_hash_entry *h;
12276 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12277 FALSE, FALSE, TRUE);
12278 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12279 if (htab->params->plt_thread_safe)
12280 break;
12281 }
12282 }
12283 stubs_always_before_branch = htab->params->group_size < 0;
12284 if (htab->params->group_size < 0)
12285 stub_group_size = -htab->params->group_size;
12286 else
12287 stub_group_size = htab->params->group_size;
12288
12289 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12290 return FALSE;
12291
12292 #define STUB_SHRINK_ITER 20
12293 /* Loop until no stubs added. After iteration 20 of this loop we may
12294 exit on a stub section shrinking. This is to break out of a
12295 pathological case where adding stubs on one iteration decreases
12296 section gaps (perhaps due to alignment), which then requires
12297 fewer or smaller stubs on the next iteration. */
12298
12299 while (1)
12300 {
12301 bfd *input_bfd;
12302 unsigned int bfd_indx;
12303 struct map_stub *group;
12304 asection *stub_sec;
12305
12306 htab->stub_iteration += 1;
12307
12308 for (input_bfd = info->input_bfds, bfd_indx = 0;
12309 input_bfd != NULL;
12310 input_bfd = input_bfd->link.next, bfd_indx++)
12311 {
12312 Elf_Internal_Shdr *symtab_hdr;
12313 asection *section;
12314 Elf_Internal_Sym *local_syms = NULL;
12315
12316 if (!is_ppc64_elf (input_bfd))
12317 continue;
12318
12319 /* We'll need the symbol table in a second. */
12320 symtab_hdr = &elf_symtab_hdr (input_bfd);
12321 if (symtab_hdr->sh_info == 0)
12322 continue;
12323
12324 /* Walk over each section attached to the input bfd. */
12325 for (section = input_bfd->sections;
12326 section != NULL;
12327 section = section->next)
12328 {
12329 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12330
12331 /* If there aren't any relocs, then there's nothing more
12332 to do. */
12333 if ((section->flags & SEC_RELOC) == 0
12334 || (section->flags & SEC_ALLOC) == 0
12335 || (section->flags & SEC_LOAD) == 0
12336 || (section->flags & SEC_CODE) == 0
12337 || section->reloc_count == 0)
12338 continue;
12339
12340 /* If this section is a link-once section that will be
12341 discarded, then don't create any stubs. */
12342 if (section->output_section == NULL
12343 || section->output_section->owner != info->output_bfd)
12344 continue;
12345
12346 /* Get the relocs. */
12347 internal_relocs
12348 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12349 info->keep_memory);
12350 if (internal_relocs == NULL)
12351 goto error_ret_free_local;
12352
12353 /* Now examine each relocation. */
12354 irela = internal_relocs;
12355 irelaend = irela + section->reloc_count;
12356 for (; irela < irelaend; irela++)
12357 {
12358 enum elf_ppc64_reloc_type r_type;
12359 unsigned int r_indx;
12360 enum ppc_stub_type stub_type;
12361 struct ppc_stub_hash_entry *stub_entry;
12362 asection *sym_sec, *code_sec;
12363 bfd_vma sym_value, code_value;
12364 bfd_vma destination;
12365 unsigned long local_off;
12366 bfd_boolean ok_dest;
12367 struct ppc_link_hash_entry *hash;
12368 struct ppc_link_hash_entry *fdh;
12369 struct elf_link_hash_entry *h;
12370 Elf_Internal_Sym *sym;
12371 char *stub_name;
12372 const asection *id_sec;
12373 struct _opd_sec_data *opd;
12374 struct plt_entry *plt_ent;
12375
12376 r_type = ELF64_R_TYPE (irela->r_info);
12377 r_indx = ELF64_R_SYM (irela->r_info);
12378
12379 if (r_type >= R_PPC64_max)
12380 {
12381 bfd_set_error (bfd_error_bad_value);
12382 goto error_ret_free_internal;
12383 }
12384
12385 /* Only look for stubs on branch instructions. */
12386 if (r_type != R_PPC64_REL24
12387 && r_type != R_PPC64_REL14
12388 && r_type != R_PPC64_REL14_BRTAKEN
12389 && r_type != R_PPC64_REL14_BRNTAKEN)
12390 continue;
12391
12392 /* Now determine the call target, its name, value,
12393 section. */
12394 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12395 r_indx, input_bfd))
12396 goto error_ret_free_internal;
12397 hash = (struct ppc_link_hash_entry *) h;
12398
12399 ok_dest = FALSE;
12400 fdh = NULL;
12401 sym_value = 0;
12402 if (hash == NULL)
12403 {
12404 sym_value = sym->st_value;
12405 if (sym_sec != NULL
12406 && sym_sec->output_section != NULL)
12407 ok_dest = TRUE;
12408 }
12409 else if (hash->elf.root.type == bfd_link_hash_defined
12410 || hash->elf.root.type == bfd_link_hash_defweak)
12411 {
12412 sym_value = hash->elf.root.u.def.value;
12413 if (sym_sec->output_section != NULL)
12414 ok_dest = TRUE;
12415 }
12416 else if (hash->elf.root.type == bfd_link_hash_undefweak
12417 || hash->elf.root.type == bfd_link_hash_undefined)
12418 {
12419 /* Recognise an old ABI func code entry sym, and
12420 use the func descriptor sym instead if it is
12421 defined. */
12422 if (hash->elf.root.root.string[0] == '.'
12423 && (fdh = lookup_fdh (hash, htab)) != NULL)
12424 {
12425 if (fdh->elf.root.type == bfd_link_hash_defined
12426 || fdh->elf.root.type == bfd_link_hash_defweak)
12427 {
12428 sym_sec = fdh->elf.root.u.def.section;
12429 sym_value = fdh->elf.root.u.def.value;
12430 if (sym_sec->output_section != NULL)
12431 ok_dest = TRUE;
12432 }
12433 else
12434 fdh = NULL;
12435 }
12436 }
12437 else
12438 {
12439 bfd_set_error (bfd_error_bad_value);
12440 goto error_ret_free_internal;
12441 }
12442
12443 destination = 0;
12444 local_off = 0;
12445 if (ok_dest)
12446 {
12447 sym_value += irela->r_addend;
12448 destination = (sym_value
12449 + sym_sec->output_offset
12450 + sym_sec->output_section->vma);
12451 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12452 ? hash->elf.other
12453 : sym->st_other);
12454 }
12455
12456 code_sec = sym_sec;
12457 code_value = sym_value;
12458 opd = get_opd_info (sym_sec);
12459 if (opd != NULL)
12460 {
12461 bfd_vma dest;
12462
12463 if (hash == NULL && opd->adjust != NULL)
12464 {
12465 long adjust = opd->adjust[OPD_NDX (sym_value)];
12466 if (adjust == -1)
12467 continue;
12468 code_value += adjust;
12469 sym_value += adjust;
12470 }
12471 dest = opd_entry_value (sym_sec, sym_value,
12472 &code_sec, &code_value, FALSE);
12473 if (dest != (bfd_vma) -1)
12474 {
12475 destination = dest;
12476 if (fdh != NULL)
12477 {
12478 /* Fixup old ABI sym to point at code
12479 entry. */
12480 hash->elf.root.type = bfd_link_hash_defweak;
12481 hash->elf.root.u.def.section = code_sec;
12482 hash->elf.root.u.def.value = code_value;
12483 }
12484 }
12485 }
12486
12487 /* Determine what (if any) linker stub is needed. */
12488 plt_ent = NULL;
12489 stub_type = ppc_type_of_stub (section, irela, &hash,
12490 &plt_ent, destination,
12491 local_off);
12492
12493 if (stub_type != ppc_stub_plt_call)
12494 {
12495 /* Check whether we need a TOC adjusting stub.
12496 Since the linker pastes together pieces from
12497 different object files when creating the
12498 _init and _fini functions, it may be that a
12499 call to what looks like a local sym is in
12500 fact a call needing a TOC adjustment. */
12501 if (code_sec != NULL
12502 && code_sec->output_section != NULL
12503 && (htab->sec_info[code_sec->id].toc_off
12504 != htab->sec_info[section->id].toc_off)
12505 && (code_sec->has_toc_reloc
12506 || code_sec->makes_toc_func_call))
12507 stub_type = ppc_stub_long_branch_r2off;
12508 }
12509
12510 if (stub_type == ppc_stub_none)
12511 continue;
12512
12513 /* __tls_get_addr calls might be eliminated. */
12514 if (stub_type != ppc_stub_plt_call
12515 && hash != NULL
12516 && (hash == htab->tls_get_addr
12517 || hash == htab->tls_get_addr_fd)
12518 && section->has_tls_reloc
12519 && irela != internal_relocs)
12520 {
12521 /* Get tls info. */
12522 unsigned char *tls_mask;
12523
12524 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12525 irela - 1, input_bfd))
12526 goto error_ret_free_internal;
12527 if (*tls_mask != 0)
12528 continue;
12529 }
12530
12531 if (stub_type == ppc_stub_plt_call
12532 && irela + 1 < irelaend
12533 && irela[1].r_offset == irela->r_offset + 4
12534 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12535 {
12536 if (!tocsave_find (htab, INSERT,
12537 &local_syms, irela + 1, input_bfd))
12538 goto error_ret_free_internal;
12539 }
12540 else if (stub_type == ppc_stub_plt_call)
12541 stub_type = ppc_stub_plt_call_r2save;
12542
12543 /* Support for grouping stub sections. */
12544 id_sec = htab->sec_info[section->id].u.group->link_sec;
12545
12546 /* Get the name of this stub. */
12547 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12548 if (!stub_name)
12549 goto error_ret_free_internal;
12550
12551 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12552 stub_name, FALSE, FALSE);
12553 if (stub_entry != NULL)
12554 {
12555 /* The proper stub has already been created. */
12556 free (stub_name);
12557 if (stub_type == ppc_stub_plt_call_r2save)
12558 stub_entry->stub_type = stub_type;
12559 continue;
12560 }
12561
12562 stub_entry = ppc_add_stub (stub_name, section, info);
12563 if (stub_entry == NULL)
12564 {
12565 free (stub_name);
12566 error_ret_free_internal:
12567 if (elf_section_data (section)->relocs == NULL)
12568 free (internal_relocs);
12569 error_ret_free_local:
12570 if (local_syms != NULL
12571 && (symtab_hdr->contents
12572 != (unsigned char *) local_syms))
12573 free (local_syms);
12574 return FALSE;
12575 }
12576
12577 stub_entry->stub_type = stub_type;
12578 if (stub_type != ppc_stub_plt_call
12579 && stub_type != ppc_stub_plt_call_r2save)
12580 {
12581 stub_entry->target_value = code_value;
12582 stub_entry->target_section = code_sec;
12583 }
12584 else
12585 {
12586 stub_entry->target_value = sym_value;
12587 stub_entry->target_section = sym_sec;
12588 }
12589 stub_entry->h = hash;
12590 stub_entry->plt_ent = plt_ent;
12591 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12592
12593 if (stub_entry->h != NULL)
12594 htab->stub_globals += 1;
12595 }
12596
12597 /* We're done with the internal relocs, free them. */
12598 if (elf_section_data (section)->relocs != internal_relocs)
12599 free (internal_relocs);
12600 }
12601
12602 if (local_syms != NULL
12603 && symtab_hdr->contents != (unsigned char *) local_syms)
12604 {
12605 if (!info->keep_memory)
12606 free (local_syms);
12607 else
12608 symtab_hdr->contents = (unsigned char *) local_syms;
12609 }
12610 }
12611
12612 /* We may have added some stubs. Find out the new size of the
12613 stub sections. */
12614 for (stub_sec = htab->params->stub_bfd->sections;
12615 stub_sec != NULL;
12616 stub_sec = stub_sec->next)
12617 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12618 {
12619 stub_sec->rawsize = stub_sec->size;
12620 stub_sec->size = 0;
12621 stub_sec->reloc_count = 0;
12622 stub_sec->flags &= ~SEC_RELOC;
12623 }
12624
12625 htab->brlt->size = 0;
12626 htab->brlt->reloc_count = 0;
12627 htab->brlt->flags &= ~SEC_RELOC;
12628 if (htab->relbrlt != NULL)
12629 htab->relbrlt->size = 0;
12630
12631 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12632
12633 for (group = htab->group; group != NULL; group = group->next)
12634 if (group->needs_save_res)
12635 group->stub_sec->size += htab->sfpr->size;
12636
12637 if (info->emitrelocations
12638 && htab->glink != NULL && htab->glink->size != 0)
12639 {
12640 htab->glink->reloc_count = 1;
12641 htab->glink->flags |= SEC_RELOC;
12642 }
12643
12644 if (htab->glink_eh_frame != NULL
12645 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12646 && htab->glink_eh_frame->output_section->size != 0)
12647 {
12648 size_t size = 0, align;
12649
12650 for (stub_sec = htab->params->stub_bfd->sections;
12651 stub_sec != NULL;
12652 stub_sec = stub_sec->next)
12653 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12654 size += 24;
12655 if (htab->glink != NULL && htab->glink->size != 0)
12656 size += 24;
12657 if (size != 0)
12658 size += sizeof (glink_eh_frame_cie);
12659 align = 1;
12660 align <<= htab->glink_eh_frame->output_section->alignment_power;
12661 align -= 1;
12662 size = (size + align) & ~align;
12663 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12664 htab->glink_eh_frame->size = size;
12665 }
12666
12667 if (htab->params->plt_stub_align != 0)
12668 for (stub_sec = htab->params->stub_bfd->sections;
12669 stub_sec != NULL;
12670 stub_sec = stub_sec->next)
12671 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12672 stub_sec->size = ((stub_sec->size
12673 + (1 << htab->params->plt_stub_align) - 1)
12674 & -(1 << htab->params->plt_stub_align));
12675
12676 for (stub_sec = htab->params->stub_bfd->sections;
12677 stub_sec != NULL;
12678 stub_sec = stub_sec->next)
12679 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12680 && stub_sec->rawsize != stub_sec->size
12681 && (htab->stub_iteration <= STUB_SHRINK_ITER
12682 || stub_sec->rawsize < stub_sec->size))
12683 break;
12684
12685 if (stub_sec == NULL
12686 && (htab->glink_eh_frame == NULL
12687 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12688 break;
12689
12690 /* Ask the linker to do its stuff. */
12691 (*htab->params->layout_sections_again) ();
12692 }
12693
12694 if (htab->glink_eh_frame != NULL
12695 && htab->glink_eh_frame->size != 0)
12696 {
12697 bfd_vma val;
12698 bfd_byte *p, *last_fde;
12699 size_t last_fde_len, size, align, pad;
12700 asection *stub_sec;
12701
12702 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12703 if (p == NULL)
12704 return FALSE;
12705 htab->glink_eh_frame->contents = p;
12706 last_fde = p;
12707
12708 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12709 /* CIE length (rewrite in case little-endian). */
12710 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12711 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12712 p += sizeof (glink_eh_frame_cie);
12713
12714 for (stub_sec = htab->params->stub_bfd->sections;
12715 stub_sec != NULL;
12716 stub_sec = stub_sec->next)
12717 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12718 {
12719 last_fde = p;
12720 last_fde_len = 20;
12721 /* FDE length. */
12722 bfd_put_32 (htab->elf.dynobj, 20, p);
12723 p += 4;
12724 /* CIE pointer. */
12725 val = p - htab->glink_eh_frame->contents;
12726 bfd_put_32 (htab->elf.dynobj, val, p);
12727 p += 4;
12728 /* Offset to stub section, written later. */
12729 p += 4;
12730 /* stub section size. */
12731 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12732 p += 4;
12733 /* Augmentation. */
12734 p += 1;
12735 /* Pad. */
12736 p += 7;
12737 }
12738 if (htab->glink != NULL && htab->glink->size != 0)
12739 {
12740 last_fde = p;
12741 last_fde_len = 20;
12742 /* FDE length. */
12743 bfd_put_32 (htab->elf.dynobj, 20, p);
12744 p += 4;
12745 /* CIE pointer. */
12746 val = p - htab->glink_eh_frame->contents;
12747 bfd_put_32 (htab->elf.dynobj, val, p);
12748 p += 4;
12749 /* Offset to .glink, written later. */
12750 p += 4;
12751 /* .glink size. */
12752 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12753 p += 4;
12754 /* Augmentation. */
12755 p += 1;
12756
12757 *p++ = DW_CFA_advance_loc + 1;
12758 *p++ = DW_CFA_register;
12759 *p++ = 65;
12760 *p++ = htab->opd_abi ? 12 : 0;
12761 *p++ = DW_CFA_advance_loc + 4;
12762 *p++ = DW_CFA_restore_extended;
12763 *p++ = 65;
12764 }
12765 /* Subsume any padding into the last FDE if user .eh_frame
12766 sections are aligned more than glink_eh_frame. Otherwise any
12767 zero padding will be seen as a terminator. */
12768 size = p - htab->glink_eh_frame->contents;
12769 align = 1;
12770 align <<= htab->glink_eh_frame->output_section->alignment_power;
12771 align -= 1;
12772 pad = ((size + align) & ~align) - size;
12773 htab->glink_eh_frame->size = size + pad;
12774 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12775 }
12776
12777 maybe_strip_output (info, htab->brlt);
12778 if (htab->glink_eh_frame != NULL)
12779 maybe_strip_output (info, htab->glink_eh_frame);
12780
12781 return TRUE;
12782 }
12783
12784 /* Called after we have determined section placement. If sections
12785 move, we'll be called again. Provide a value for TOCstart. */
12786
12787 bfd_vma
12788 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12789 {
12790 asection *s;
12791 bfd_vma TOCstart, adjust;
12792
12793 if (info != NULL)
12794 {
12795 struct elf_link_hash_entry *h;
12796 struct elf_link_hash_table *htab = elf_hash_table (info);
12797
12798 if (is_elf_hash_table (htab)
12799 && htab->hgot != NULL)
12800 h = htab->hgot;
12801 else
12802 {
12803 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12804 if (is_elf_hash_table (htab))
12805 htab->hgot = h;
12806 }
12807 if (h != NULL
12808 && h->root.type == bfd_link_hash_defined
12809 && !h->root.linker_def
12810 && (!is_elf_hash_table (htab)
12811 || h->def_regular))
12812 {
12813 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12814 + h->root.u.def.section->output_offset
12815 + h->root.u.def.section->output_section->vma);
12816 _bfd_set_gp_value (obfd, TOCstart);
12817 return TOCstart;
12818 }
12819 }
12820
12821 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12822 order. The TOC starts where the first of these sections starts. */
12823 s = bfd_get_section_by_name (obfd, ".got");
12824 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12825 s = bfd_get_section_by_name (obfd, ".toc");
12826 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12827 s = bfd_get_section_by_name (obfd, ".tocbss");
12828 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12829 s = bfd_get_section_by_name (obfd, ".plt");
12830 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12831 {
12832 /* This may happen for
12833 o references to TOC base (SYM@toc / TOC[tc0]) without a
12834 .toc directive
12835 o bad linker script
12836 o --gc-sections and empty TOC sections
12837
12838 FIXME: Warn user? */
12839
12840 /* Look for a likely section. We probably won't even be
12841 using TOCstart. */
12842 for (s = obfd->sections; s != NULL; s = s->next)
12843 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12844 | SEC_EXCLUDE))
12845 == (SEC_ALLOC | SEC_SMALL_DATA))
12846 break;
12847 if (s == NULL)
12848 for (s = obfd->sections; s != NULL; s = s->next)
12849 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12850 == (SEC_ALLOC | SEC_SMALL_DATA))
12851 break;
12852 if (s == NULL)
12853 for (s = obfd->sections; s != NULL; s = s->next)
12854 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12855 == SEC_ALLOC)
12856 break;
12857 if (s == NULL)
12858 for (s = obfd->sections; s != NULL; s = s->next)
12859 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12860 break;
12861 }
12862
12863 TOCstart = 0;
12864 if (s != NULL)
12865 TOCstart = s->output_section->vma + s->output_offset;
12866
12867 /* Force alignment. */
12868 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12869 TOCstart -= adjust;
12870 _bfd_set_gp_value (obfd, TOCstart);
12871
12872 if (info != NULL && s != NULL)
12873 {
12874 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12875
12876 if (htab != NULL)
12877 {
12878 if (htab->elf.hgot != NULL)
12879 {
12880 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12881 htab->elf.hgot->root.u.def.section = s;
12882 }
12883 }
12884 else
12885 {
12886 struct bfd_link_hash_entry *bh = NULL;
12887 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12888 s, TOC_BASE_OFF - adjust,
12889 NULL, FALSE, FALSE, &bh);
12890 }
12891 }
12892 return TOCstart;
12893 }
12894
12895 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12896 write out any global entry stubs. */
12897
12898 static bfd_boolean
12899 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12900 {
12901 struct bfd_link_info *info;
12902 struct ppc_link_hash_table *htab;
12903 struct plt_entry *pent;
12904 asection *s;
12905
12906 if (h->root.type == bfd_link_hash_indirect)
12907 return TRUE;
12908
12909 if (!h->pointer_equality_needed)
12910 return TRUE;
12911
12912 if (h->def_regular)
12913 return TRUE;
12914
12915 info = inf;
12916 htab = ppc_hash_table (info);
12917 if (htab == NULL)
12918 return FALSE;
12919
12920 s = htab->glink;
12921 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12922 if (pent->plt.offset != (bfd_vma) -1
12923 && pent->addend == 0)
12924 {
12925 bfd_byte *p;
12926 asection *plt;
12927 bfd_vma off;
12928
12929 p = s->contents + h->root.u.def.value;
12930 plt = htab->elf.splt;
12931 if (!htab->elf.dynamic_sections_created
12932 || h->dynindx == -1)
12933 plt = htab->elf.iplt;
12934 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12935 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12936
12937 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12938 {
12939 info->callbacks->einfo
12940 (_("%P: linkage table error against `%T'\n"),
12941 h->root.root.string);
12942 bfd_set_error (bfd_error_bad_value);
12943 htab->stub_error = TRUE;
12944 }
12945
12946 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12947 if (htab->params->emit_stub_syms)
12948 {
12949 size_t len = strlen (h->root.root.string);
12950 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12951
12952 if (name == NULL)
12953 return FALSE;
12954
12955 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12956 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12957 if (h == NULL)
12958 return FALSE;
12959 if (h->root.type == bfd_link_hash_new)
12960 {
12961 h->root.type = bfd_link_hash_defined;
12962 h->root.u.def.section = s;
12963 h->root.u.def.value = p - s->contents;
12964 h->ref_regular = 1;
12965 h->def_regular = 1;
12966 h->ref_regular_nonweak = 1;
12967 h->forced_local = 1;
12968 h->non_elf = 0;
12969 h->root.linker_def = 1;
12970 }
12971 }
12972
12973 if (PPC_HA (off) != 0)
12974 {
12975 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12976 p += 4;
12977 }
12978 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12979 p += 4;
12980 bfd_put_32 (s->owner, MTCTR_R12, p);
12981 p += 4;
12982 bfd_put_32 (s->owner, BCTR, p);
12983 break;
12984 }
12985 return TRUE;
12986 }
12987
12988 /* Build all the stubs associated with the current output file.
12989 The stubs are kept in a hash table attached to the main linker
12990 hash table. This function is called via gldelf64ppc_finish. */
12991
12992 bfd_boolean
12993 ppc64_elf_build_stubs (struct bfd_link_info *info,
12994 char **stats)
12995 {
12996 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12997 struct map_stub *group;
12998 asection *stub_sec;
12999 bfd_byte *p;
13000 int stub_sec_count = 0;
13001
13002 if (htab == NULL)
13003 return FALSE;
13004
13005 /* Allocate memory to hold the linker stubs. */
13006 for (stub_sec = htab->params->stub_bfd->sections;
13007 stub_sec != NULL;
13008 stub_sec = stub_sec->next)
13009 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
13010 && stub_sec->size != 0)
13011 {
13012 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13013 if (stub_sec->contents == NULL)
13014 return FALSE;
13015 stub_sec->size = 0;
13016 }
13017
13018 if (htab->glink != NULL && htab->glink->size != 0)
13019 {
13020 unsigned int indx;
13021 bfd_vma plt0;
13022
13023 /* Build the .glink plt call stub. */
13024 if (htab->params->emit_stub_syms)
13025 {
13026 struct elf_link_hash_entry *h;
13027 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13028 TRUE, FALSE, FALSE);
13029 if (h == NULL)
13030 return FALSE;
13031 if (h->root.type == bfd_link_hash_new)
13032 {
13033 h->root.type = bfd_link_hash_defined;
13034 h->root.u.def.section = htab->glink;
13035 h->root.u.def.value = 8;
13036 h->ref_regular = 1;
13037 h->def_regular = 1;
13038 h->ref_regular_nonweak = 1;
13039 h->forced_local = 1;
13040 h->non_elf = 0;
13041 h->root.linker_def = 1;
13042 }
13043 }
13044 plt0 = (htab->elf.splt->output_section->vma
13045 + htab->elf.splt->output_offset
13046 - 16);
13047 if (info->emitrelocations)
13048 {
13049 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13050 if (r == NULL)
13051 return FALSE;
13052 r->r_offset = (htab->glink->output_offset
13053 + htab->glink->output_section->vma);
13054 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13055 r->r_addend = plt0;
13056 }
13057 p = htab->glink->contents;
13058 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13059 bfd_put_64 (htab->glink->owner, plt0, p);
13060 p += 8;
13061 if (htab->opd_abi)
13062 {
13063 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13064 p += 4;
13065 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13066 p += 4;
13067 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13068 p += 4;
13069 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13070 p += 4;
13071 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13072 p += 4;
13073 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13074 p += 4;
13075 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13076 p += 4;
13077 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13078 p += 4;
13079 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13080 p += 4;
13081 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13082 p += 4;
13083 }
13084 else
13085 {
13086 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13087 p += 4;
13088 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13089 p += 4;
13090 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13091 p += 4;
13092 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13093 p += 4;
13094 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13095 p += 4;
13096 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13097 p += 4;
13098 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13099 p += 4;
13100 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13101 p += 4;
13102 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13103 p += 4;
13104 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13105 p += 4;
13106 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13107 p += 4;
13108 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13109 p += 4;
13110 }
13111 bfd_put_32 (htab->glink->owner, BCTR, p);
13112 p += 4;
13113 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13114 {
13115 bfd_put_32 (htab->glink->owner, NOP, p);
13116 p += 4;
13117 }
13118
13119 /* Build the .glink lazy link call stubs. */
13120 indx = 0;
13121 while (p < htab->glink->contents + htab->glink->rawsize)
13122 {
13123 if (htab->opd_abi)
13124 {
13125 if (indx < 0x8000)
13126 {
13127 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13128 p += 4;
13129 }
13130 else
13131 {
13132 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13133 p += 4;
13134 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13135 p);
13136 p += 4;
13137 }
13138 }
13139 bfd_put_32 (htab->glink->owner,
13140 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13141 indx++;
13142 p += 4;
13143 }
13144
13145 /* Build .glink global entry stubs. */
13146 if (htab->glink->size > htab->glink->rawsize)
13147 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13148 }
13149
13150 if (htab->brlt != NULL && htab->brlt->size != 0)
13151 {
13152 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13153 htab->brlt->size);
13154 if (htab->brlt->contents == NULL)
13155 return FALSE;
13156 }
13157 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13158 {
13159 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13160 htab->relbrlt->size);
13161 if (htab->relbrlt->contents == NULL)
13162 return FALSE;
13163 }
13164
13165 /* Build the stubs as directed by the stub hash table. */
13166 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13167
13168 for (group = htab->group; group != NULL; group = group->next)
13169 if (group->needs_save_res)
13170 {
13171 stub_sec = group->stub_sec;
13172 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13173 htab->sfpr->size);
13174 if (htab->params->emit_stub_syms)
13175 {
13176 unsigned int i;
13177
13178 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13179 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13180 return FALSE;
13181 }
13182 stub_sec->size += htab->sfpr->size;
13183 }
13184
13185 if (htab->relbrlt != NULL)
13186 htab->relbrlt->reloc_count = 0;
13187
13188 if (htab->params->plt_stub_align != 0)
13189 for (stub_sec = htab->params->stub_bfd->sections;
13190 stub_sec != NULL;
13191 stub_sec = stub_sec->next)
13192 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13193 stub_sec->size = ((stub_sec->size
13194 + (1 << htab->params->plt_stub_align) - 1)
13195 & -(1 << htab->params->plt_stub_align));
13196
13197 for (stub_sec = htab->params->stub_bfd->sections;
13198 stub_sec != NULL;
13199 stub_sec = stub_sec->next)
13200 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13201 {
13202 stub_sec_count += 1;
13203 if (stub_sec->rawsize != stub_sec->size
13204 && (htab->stub_iteration <= STUB_SHRINK_ITER
13205 || stub_sec->rawsize < stub_sec->size))
13206 break;
13207 }
13208
13209 /* Note that the glink_eh_frame check here is not only testing that
13210 the generated size matched the calculated size but also that
13211 bfd_elf_discard_info didn't make any changes to the section. */
13212 if (stub_sec != NULL
13213 || (htab->glink_eh_frame != NULL
13214 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13215 {
13216 htab->stub_error = TRUE;
13217 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13218 }
13219
13220 if (htab->stub_error)
13221 return FALSE;
13222
13223 if (stats != NULL)
13224 {
13225 *stats = bfd_malloc (500);
13226 if (*stats == NULL)
13227 return FALSE;
13228
13229 sprintf (*stats, _("linker stubs in %u group%s\n"
13230 " branch %lu\n"
13231 " toc adjust %lu\n"
13232 " long branch %lu\n"
13233 " long toc adj %lu\n"
13234 " plt call %lu\n"
13235 " plt call toc %lu\n"
13236 " global entry %lu"),
13237 stub_sec_count,
13238 stub_sec_count == 1 ? "" : "s",
13239 htab->stub_count[ppc_stub_long_branch - 1],
13240 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13241 htab->stub_count[ppc_stub_plt_branch - 1],
13242 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13243 htab->stub_count[ppc_stub_plt_call - 1],
13244 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13245 htab->stub_count[ppc_stub_global_entry - 1]);
13246 }
13247 return TRUE;
13248 }
13249
13250 /* This function undoes the changes made by add_symbol_adjust. */
13251
13252 static bfd_boolean
13253 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
13254 {
13255 struct ppc_link_hash_entry *eh;
13256
13257 if (h->root.type == bfd_link_hash_indirect)
13258 return TRUE;
13259
13260 eh = (struct ppc_link_hash_entry *) h;
13261 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
13262 return TRUE;
13263
13264 eh->elf.root.type = bfd_link_hash_undefined;
13265 return TRUE;
13266 }
13267
13268 void
13269 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13270 {
13271 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13272
13273 if (htab != NULL)
13274 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13275 }
13276
13277 /* What to do when ld finds relocations against symbols defined in
13278 discarded sections. */
13279
13280 static unsigned int
13281 ppc64_elf_action_discarded (asection *sec)
13282 {
13283 if (strcmp (".opd", sec->name) == 0)
13284 return 0;
13285
13286 if (strcmp (".toc", sec->name) == 0)
13287 return 0;
13288
13289 if (strcmp (".toc1", sec->name) == 0)
13290 return 0;
13291
13292 return _bfd_elf_default_action_discarded (sec);
13293 }
13294
13295 /* The RELOCATE_SECTION function is called by the ELF backend linker
13296 to handle the relocations for a section.
13297
13298 The relocs are always passed as Rela structures; if the section
13299 actually uses Rel structures, the r_addend field will always be
13300 zero.
13301
13302 This function is responsible for adjust the section contents as
13303 necessary, and (if using Rela relocs and generating a
13304 relocatable output file) adjusting the reloc addend as
13305 necessary.
13306
13307 This function does not have to worry about setting the reloc
13308 address or the reloc symbol index.
13309
13310 LOCAL_SYMS is a pointer to the swapped in local symbols.
13311
13312 LOCAL_SECTIONS is an array giving the section in the input file
13313 corresponding to the st_shndx field of each local symbol.
13314
13315 The global hash table entry for the global symbols can be found
13316 via elf_sym_hashes (input_bfd).
13317
13318 When generating relocatable output, this function must handle
13319 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13320 going to be the section symbol corresponding to the output
13321 section, which means that the addend must be adjusted
13322 accordingly. */
13323
13324 static bfd_boolean
13325 ppc64_elf_relocate_section (bfd *output_bfd,
13326 struct bfd_link_info *info,
13327 bfd *input_bfd,
13328 asection *input_section,
13329 bfd_byte *contents,
13330 Elf_Internal_Rela *relocs,
13331 Elf_Internal_Sym *local_syms,
13332 asection **local_sections)
13333 {
13334 struct ppc_link_hash_table *htab;
13335 Elf_Internal_Shdr *symtab_hdr;
13336 struct elf_link_hash_entry **sym_hashes;
13337 Elf_Internal_Rela *rel;
13338 Elf_Internal_Rela *wrel;
13339 Elf_Internal_Rela *relend;
13340 Elf_Internal_Rela outrel;
13341 bfd_byte *loc;
13342 struct got_entry **local_got_ents;
13343 bfd_vma TOCstart;
13344 bfd_boolean ret = TRUE;
13345 bfd_boolean is_opd;
13346 /* Assume 'at' branch hints. */
13347 bfd_boolean is_isa_v2 = TRUE;
13348 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13349
13350 /* Initialize howto table if needed. */
13351 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13352 ppc_howto_init ();
13353
13354 htab = ppc_hash_table (info);
13355 if (htab == NULL)
13356 return FALSE;
13357
13358 /* Don't relocate stub sections. */
13359 if (input_section->owner == htab->params->stub_bfd)
13360 return TRUE;
13361
13362 BFD_ASSERT (is_ppc64_elf (input_bfd));
13363
13364 local_got_ents = elf_local_got_ents (input_bfd);
13365 TOCstart = elf_gp (output_bfd);
13366 symtab_hdr = &elf_symtab_hdr (input_bfd);
13367 sym_hashes = elf_sym_hashes (input_bfd);
13368 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13369
13370 rel = wrel = relocs;
13371 relend = relocs + input_section->reloc_count;
13372 for (; rel < relend; wrel++, rel++)
13373 {
13374 enum elf_ppc64_reloc_type r_type;
13375 bfd_vma addend;
13376 bfd_reloc_status_type r;
13377 Elf_Internal_Sym *sym;
13378 asection *sec;
13379 struct elf_link_hash_entry *h_elf;
13380 struct ppc_link_hash_entry *h;
13381 struct ppc_link_hash_entry *fdh;
13382 const char *sym_name;
13383 unsigned long r_symndx, toc_symndx;
13384 bfd_vma toc_addend;
13385 unsigned char tls_mask, tls_gd, tls_type;
13386 unsigned char sym_type;
13387 bfd_vma relocation;
13388 bfd_boolean unresolved_reloc;
13389 bfd_boolean warned;
13390 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13391 unsigned int insn;
13392 unsigned int mask;
13393 struct ppc_stub_hash_entry *stub_entry;
13394 bfd_vma max_br_offset;
13395 bfd_vma from;
13396 Elf_Internal_Rela orig_rel;
13397 reloc_howto_type *howto;
13398 struct reloc_howto_struct alt_howto;
13399
13400 again:
13401 orig_rel = *rel;
13402
13403 r_type = ELF64_R_TYPE (rel->r_info);
13404 r_symndx = ELF64_R_SYM (rel->r_info);
13405
13406 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13407 symbol of the previous ADDR64 reloc. The symbol gives us the
13408 proper TOC base to use. */
13409 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13410 && wrel != relocs
13411 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13412 && is_opd)
13413 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13414
13415 sym = NULL;
13416 sec = NULL;
13417 h_elf = NULL;
13418 sym_name = NULL;
13419 unresolved_reloc = FALSE;
13420 warned = FALSE;
13421
13422 if (r_symndx < symtab_hdr->sh_info)
13423 {
13424 /* It's a local symbol. */
13425 struct _opd_sec_data *opd;
13426
13427 sym = local_syms + r_symndx;
13428 sec = local_sections[r_symndx];
13429 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13430 sym_type = ELF64_ST_TYPE (sym->st_info);
13431 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13432 opd = get_opd_info (sec);
13433 if (opd != NULL && opd->adjust != NULL)
13434 {
13435 long adjust = opd->adjust[OPD_NDX (sym->st_value
13436 + rel->r_addend)];
13437 if (adjust == -1)
13438 relocation = 0;
13439 else
13440 {
13441 /* If this is a relocation against the opd section sym
13442 and we have edited .opd, adjust the reloc addend so
13443 that ld -r and ld --emit-relocs output is correct.
13444 If it is a reloc against some other .opd symbol,
13445 then the symbol value will be adjusted later. */
13446 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13447 rel->r_addend += adjust;
13448 else
13449 relocation += adjust;
13450 }
13451 }
13452 }
13453 else
13454 {
13455 bfd_boolean ignored;
13456
13457 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13458 r_symndx, symtab_hdr, sym_hashes,
13459 h_elf, sec, relocation,
13460 unresolved_reloc, warned, ignored);
13461 sym_name = h_elf->root.root.string;
13462 sym_type = h_elf->type;
13463 if (sec != NULL
13464 && sec->owner == output_bfd
13465 && strcmp (sec->name, ".opd") == 0)
13466 {
13467 /* This is a symbol defined in a linker script. All
13468 such are defined in output sections, even those
13469 defined by simple assignment from a symbol defined in
13470 an input section. Transfer the symbol to an
13471 appropriate input .opd section, so that a branch to
13472 this symbol will be mapped to the location specified
13473 by the opd entry. */
13474 struct bfd_link_order *lo;
13475 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13476 if (lo->type == bfd_indirect_link_order)
13477 {
13478 asection *isec = lo->u.indirect.section;
13479 if (h_elf->root.u.def.value >= isec->output_offset
13480 && h_elf->root.u.def.value < (isec->output_offset
13481 + isec->size))
13482 {
13483 h_elf->root.u.def.value -= isec->output_offset;
13484 h_elf->root.u.def.section = isec;
13485 sec = isec;
13486 break;
13487 }
13488 }
13489 }
13490 }
13491 h = (struct ppc_link_hash_entry *) h_elf;
13492
13493 if (sec != NULL && discarded_section (sec))
13494 {
13495 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13496 input_bfd, input_section,
13497 contents + rel->r_offset);
13498 wrel->r_offset = rel->r_offset;
13499 wrel->r_info = 0;
13500 wrel->r_addend = 0;
13501
13502 /* For ld -r, remove relocations in debug sections against
13503 sections defined in discarded sections. Not done for
13504 non-debug to preserve relocs in .eh_frame which the
13505 eh_frame editing code expects to be present. */
13506 if (bfd_link_relocatable (info)
13507 && (input_section->flags & SEC_DEBUGGING))
13508 wrel--;
13509
13510 continue;
13511 }
13512
13513 if (bfd_link_relocatable (info))
13514 goto copy_reloc;
13515
13516 if (h != NULL && &h->elf == htab->elf.hgot)
13517 {
13518 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13519 sec = bfd_abs_section_ptr;
13520 unresolved_reloc = FALSE;
13521 }
13522
13523 /* TLS optimizations. Replace instruction sequences and relocs
13524 based on information we collected in tls_optimize. We edit
13525 RELOCS so that --emit-relocs will output something sensible
13526 for the final instruction stream. */
13527 tls_mask = 0;
13528 tls_gd = 0;
13529 toc_symndx = 0;
13530 if (h != NULL)
13531 tls_mask = h->tls_mask;
13532 else if (local_got_ents != NULL)
13533 {
13534 struct plt_entry **local_plt = (struct plt_entry **)
13535 (local_got_ents + symtab_hdr->sh_info);
13536 unsigned char *lgot_masks = (unsigned char *)
13537 (local_plt + symtab_hdr->sh_info);
13538 tls_mask = lgot_masks[r_symndx];
13539 }
13540 if (tls_mask == 0
13541 && (r_type == R_PPC64_TLS
13542 || r_type == R_PPC64_TLSGD
13543 || r_type == R_PPC64_TLSLD))
13544 {
13545 /* Check for toc tls entries. */
13546 unsigned char *toc_tls;
13547
13548 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13549 &local_syms, rel, input_bfd))
13550 return FALSE;
13551
13552 if (toc_tls)
13553 tls_mask = *toc_tls;
13554 }
13555
13556 /* Check that tls relocs are used with tls syms, and non-tls
13557 relocs are used with non-tls syms. */
13558 if (r_symndx != STN_UNDEF
13559 && r_type != R_PPC64_NONE
13560 && (h == NULL
13561 || h->elf.root.type == bfd_link_hash_defined
13562 || h->elf.root.type == bfd_link_hash_defweak)
13563 && (IS_PPC64_TLS_RELOC (r_type)
13564 != (sym_type == STT_TLS
13565 || (sym_type == STT_SECTION
13566 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13567 {
13568 if (tls_mask != 0
13569 && (r_type == R_PPC64_TLS
13570 || r_type == R_PPC64_TLSGD
13571 || r_type == R_PPC64_TLSLD))
13572 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13573 ;
13574 else
13575 info->callbacks->einfo
13576 (!IS_PPC64_TLS_RELOC (r_type)
13577 /* xgettext:c-format */
13578 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13579 /* xgettext:c-format */
13580 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13581 input_bfd, input_section, rel->r_offset,
13582 ppc64_elf_howto_table[r_type]->name,
13583 sym_name);
13584 }
13585
13586 /* Ensure reloc mapping code below stays sane. */
13587 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13588 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13589 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13590 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13591 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13592 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13593 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13594 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13595 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13596 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13597 abort ();
13598
13599 switch (r_type)
13600 {
13601 default:
13602 break;
13603
13604 case R_PPC64_LO_DS_OPT:
13605 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13606 if ((insn & (0x3f << 26)) != 58u << 26)
13607 abort ();
13608 insn += (14u << 26) - (58u << 26);
13609 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13610 r_type = R_PPC64_TOC16_LO;
13611 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13612 break;
13613
13614 case R_PPC64_TOC16:
13615 case R_PPC64_TOC16_LO:
13616 case R_PPC64_TOC16_DS:
13617 case R_PPC64_TOC16_LO_DS:
13618 {
13619 /* Check for toc tls entries. */
13620 unsigned char *toc_tls;
13621 int retval;
13622
13623 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13624 &local_syms, rel, input_bfd);
13625 if (retval == 0)
13626 return FALSE;
13627
13628 if (toc_tls)
13629 {
13630 tls_mask = *toc_tls;
13631 if (r_type == R_PPC64_TOC16_DS
13632 || r_type == R_PPC64_TOC16_LO_DS)
13633 {
13634 if (tls_mask != 0
13635 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13636 goto toctprel;
13637 }
13638 else
13639 {
13640 /* If we found a GD reloc pair, then we might be
13641 doing a GD->IE transition. */
13642 if (retval == 2)
13643 {
13644 tls_gd = TLS_TPRELGD;
13645 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13646 goto tls_ldgd_opt;
13647 }
13648 else if (retval == 3)
13649 {
13650 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13651 goto tls_ldgd_opt;
13652 }
13653 }
13654 }
13655 }
13656 break;
13657
13658 case R_PPC64_GOT_TPREL16_HI:
13659 case R_PPC64_GOT_TPREL16_HA:
13660 if (tls_mask != 0
13661 && (tls_mask & TLS_TPREL) == 0)
13662 {
13663 rel->r_offset -= d_offset;
13664 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13665 r_type = R_PPC64_NONE;
13666 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13667 }
13668 break;
13669
13670 case R_PPC64_GOT_TPREL16_DS:
13671 case R_PPC64_GOT_TPREL16_LO_DS:
13672 if (tls_mask != 0
13673 && (tls_mask & TLS_TPREL) == 0)
13674 {
13675 toctprel:
13676 insn = bfd_get_32 (output_bfd,
13677 contents + rel->r_offset - d_offset);
13678 insn &= 31 << 21;
13679 insn |= 0x3c0d0000; /* addis 0,13,0 */
13680 bfd_put_32 (output_bfd, insn,
13681 contents + rel->r_offset - d_offset);
13682 r_type = R_PPC64_TPREL16_HA;
13683 if (toc_symndx != 0)
13684 {
13685 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13686 rel->r_addend = toc_addend;
13687 /* We changed the symbol. Start over in order to
13688 get h, sym, sec etc. right. */
13689 goto again;
13690 }
13691 else
13692 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13693 }
13694 break;
13695
13696 case R_PPC64_TLS:
13697 if (tls_mask != 0
13698 && (tls_mask & TLS_TPREL) == 0)
13699 {
13700 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13701 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13702 if (insn == 0)
13703 abort ();
13704 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13705 /* Was PPC64_TLS which sits on insn boundary, now
13706 PPC64_TPREL16_LO which is at low-order half-word. */
13707 rel->r_offset += d_offset;
13708 r_type = R_PPC64_TPREL16_LO;
13709 if (toc_symndx != 0)
13710 {
13711 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13712 rel->r_addend = toc_addend;
13713 /* We changed the symbol. Start over in order to
13714 get h, sym, sec etc. right. */
13715 goto again;
13716 }
13717 else
13718 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13719 }
13720 break;
13721
13722 case R_PPC64_GOT_TLSGD16_HI:
13723 case R_PPC64_GOT_TLSGD16_HA:
13724 tls_gd = TLS_TPRELGD;
13725 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13726 goto tls_gdld_hi;
13727 break;
13728
13729 case R_PPC64_GOT_TLSLD16_HI:
13730 case R_PPC64_GOT_TLSLD16_HA:
13731 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13732 {
13733 tls_gdld_hi:
13734 if ((tls_mask & tls_gd) != 0)
13735 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13736 + R_PPC64_GOT_TPREL16_DS);
13737 else
13738 {
13739 rel->r_offset -= d_offset;
13740 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13741 r_type = R_PPC64_NONE;
13742 }
13743 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13744 }
13745 break;
13746
13747 case R_PPC64_GOT_TLSGD16:
13748 case R_PPC64_GOT_TLSGD16_LO:
13749 tls_gd = TLS_TPRELGD;
13750 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13751 goto tls_ldgd_opt;
13752 break;
13753
13754 case R_PPC64_GOT_TLSLD16:
13755 case R_PPC64_GOT_TLSLD16_LO:
13756 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13757 {
13758 unsigned int insn1, insn2, insn3;
13759 bfd_vma offset;
13760
13761 tls_ldgd_opt:
13762 offset = (bfd_vma) -1;
13763 /* If not using the newer R_PPC64_TLSGD/LD to mark
13764 __tls_get_addr calls, we must trust that the call
13765 stays with its arg setup insns, ie. that the next
13766 reloc is the __tls_get_addr call associated with
13767 the current reloc. Edit both insns. */
13768 if (input_section->has_tls_get_addr_call
13769 && rel + 1 < relend
13770 && branch_reloc_hash_match (input_bfd, rel + 1,
13771 htab->tls_get_addr,
13772 htab->tls_get_addr_fd))
13773 offset = rel[1].r_offset;
13774 /* We read the low GOT_TLS (or TOC16) insn because we
13775 need to keep the destination reg. It may be
13776 something other than the usual r3, and moved to r3
13777 before the call by intervening code. */
13778 insn1 = bfd_get_32 (output_bfd,
13779 contents + rel->r_offset - d_offset);
13780 if ((tls_mask & tls_gd) != 0)
13781 {
13782 /* IE */
13783 insn1 &= (0x1f << 21) | (0x1f << 16);
13784 insn1 |= 58 << 26; /* ld */
13785 insn2 = 0x7c636a14; /* add 3,3,13 */
13786 if (offset != (bfd_vma) -1)
13787 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13788 if ((tls_mask & TLS_EXPLICIT) == 0)
13789 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13790 + R_PPC64_GOT_TPREL16_DS);
13791 else
13792 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13793 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13794 }
13795 else
13796 {
13797 /* LE */
13798 insn1 &= 0x1f << 21;
13799 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13800 insn2 = 0x38630000; /* addi 3,3,0 */
13801 if (tls_gd == 0)
13802 {
13803 /* Was an LD reloc. */
13804 if (toc_symndx)
13805 sec = local_sections[toc_symndx];
13806 for (r_symndx = 0;
13807 r_symndx < symtab_hdr->sh_info;
13808 r_symndx++)
13809 if (local_sections[r_symndx] == sec)
13810 break;
13811 if (r_symndx >= symtab_hdr->sh_info)
13812 r_symndx = STN_UNDEF;
13813 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13814 if (r_symndx != STN_UNDEF)
13815 rel->r_addend -= (local_syms[r_symndx].st_value
13816 + sec->output_offset
13817 + sec->output_section->vma);
13818 }
13819 else if (toc_symndx != 0)
13820 {
13821 r_symndx = toc_symndx;
13822 rel->r_addend = toc_addend;
13823 }
13824 r_type = R_PPC64_TPREL16_HA;
13825 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13826 if (offset != (bfd_vma) -1)
13827 {
13828 rel[1].r_info = ELF64_R_INFO (r_symndx,
13829 R_PPC64_TPREL16_LO);
13830 rel[1].r_offset = offset + d_offset;
13831 rel[1].r_addend = rel->r_addend;
13832 }
13833 }
13834 bfd_put_32 (output_bfd, insn1,
13835 contents + rel->r_offset - d_offset);
13836 if (offset != (bfd_vma) -1)
13837 {
13838 insn3 = bfd_get_32 (output_bfd,
13839 contents + offset + 4);
13840 if (insn3 == NOP
13841 || insn3 == CROR_151515 || insn3 == CROR_313131)
13842 {
13843 rel[1].r_offset += 4;
13844 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13845 insn2 = NOP;
13846 }
13847 bfd_put_32 (output_bfd, insn2, contents + offset);
13848 }
13849 if ((tls_mask & tls_gd) == 0
13850 && (tls_gd == 0 || toc_symndx != 0))
13851 {
13852 /* We changed the symbol. Start over in order
13853 to get h, sym, sec etc. right. */
13854 goto again;
13855 }
13856 }
13857 break;
13858
13859 case R_PPC64_TLSGD:
13860 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13861 {
13862 unsigned int insn2, insn3;
13863 bfd_vma offset = rel->r_offset;
13864
13865 if ((tls_mask & TLS_TPRELGD) != 0)
13866 {
13867 /* IE */
13868 r_type = R_PPC64_NONE;
13869 insn2 = 0x7c636a14; /* add 3,3,13 */
13870 }
13871 else
13872 {
13873 /* LE */
13874 if (toc_symndx != 0)
13875 {
13876 r_symndx = toc_symndx;
13877 rel->r_addend = toc_addend;
13878 }
13879 r_type = R_PPC64_TPREL16_LO;
13880 rel->r_offset = offset + d_offset;
13881 insn2 = 0x38630000; /* addi 3,3,0 */
13882 }
13883 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13884 /* Zap the reloc on the _tls_get_addr call too. */
13885 BFD_ASSERT (offset == rel[1].r_offset);
13886 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13887 insn3 = bfd_get_32 (output_bfd,
13888 contents + offset + 4);
13889 if (insn3 == NOP
13890 || insn3 == CROR_151515 || insn3 == CROR_313131)
13891 {
13892 rel->r_offset += 4;
13893 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13894 insn2 = NOP;
13895 }
13896 bfd_put_32 (output_bfd, insn2, contents + offset);
13897 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13898 goto again;
13899 }
13900 break;
13901
13902 case R_PPC64_TLSLD:
13903 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13904 {
13905 unsigned int insn2, insn3;
13906 bfd_vma offset = rel->r_offset;
13907
13908 if (toc_symndx)
13909 sec = local_sections[toc_symndx];
13910 for (r_symndx = 0;
13911 r_symndx < symtab_hdr->sh_info;
13912 r_symndx++)
13913 if (local_sections[r_symndx] == sec)
13914 break;
13915 if (r_symndx >= symtab_hdr->sh_info)
13916 r_symndx = STN_UNDEF;
13917 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13918 if (r_symndx != STN_UNDEF)
13919 rel->r_addend -= (local_syms[r_symndx].st_value
13920 + sec->output_offset
13921 + sec->output_section->vma);
13922
13923 r_type = R_PPC64_TPREL16_LO;
13924 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13925 rel->r_offset = offset + d_offset;
13926 /* Zap the reloc on the _tls_get_addr call too. */
13927 BFD_ASSERT (offset == rel[1].r_offset);
13928 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13929 insn2 = 0x38630000; /* addi 3,3,0 */
13930 insn3 = bfd_get_32 (output_bfd,
13931 contents + offset + 4);
13932 if (insn3 == NOP
13933 || insn3 == CROR_151515 || insn3 == CROR_313131)
13934 {
13935 rel->r_offset += 4;
13936 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13937 insn2 = NOP;
13938 }
13939 bfd_put_32 (output_bfd, insn2, contents + offset);
13940 goto again;
13941 }
13942 break;
13943
13944 case R_PPC64_DTPMOD64:
13945 if (rel + 1 < relend
13946 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13947 && rel[1].r_offset == rel->r_offset + 8)
13948 {
13949 if ((tls_mask & TLS_GD) == 0)
13950 {
13951 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13952 if ((tls_mask & TLS_TPRELGD) != 0)
13953 r_type = R_PPC64_TPREL64;
13954 else
13955 {
13956 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13957 r_type = R_PPC64_NONE;
13958 }
13959 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13960 }
13961 }
13962 else
13963 {
13964 if ((tls_mask & TLS_LD) == 0)
13965 {
13966 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13967 r_type = R_PPC64_NONE;
13968 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13969 }
13970 }
13971 break;
13972
13973 case R_PPC64_TPREL64:
13974 if ((tls_mask & TLS_TPREL) == 0)
13975 {
13976 r_type = R_PPC64_NONE;
13977 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13978 }
13979 break;
13980
13981 case R_PPC64_ENTRY:
13982 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13983 if (!bfd_link_pic (info)
13984 && !info->traditional_format
13985 && relocation + 0x80008000 <= 0xffffffff)
13986 {
13987 unsigned int insn1, insn2;
13988
13989 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13990 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13991 if ((insn1 & ~0xfffc) == LD_R2_0R12
13992 && insn2 == ADD_R2_R2_R12)
13993 {
13994 bfd_put_32 (output_bfd,
13995 LIS_R2 + PPC_HA (relocation),
13996 contents + rel->r_offset);
13997 bfd_put_32 (output_bfd,
13998 ADDI_R2_R2 + PPC_LO (relocation),
13999 contents + rel->r_offset + 4);
14000 }
14001 }
14002 else
14003 {
14004 relocation -= (rel->r_offset
14005 + input_section->output_offset
14006 + input_section->output_section->vma);
14007 if (relocation + 0x80008000 <= 0xffffffff)
14008 {
14009 unsigned int insn1, insn2;
14010
14011 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14012 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14013 if ((insn1 & ~0xfffc) == LD_R2_0R12
14014 && insn2 == ADD_R2_R2_R12)
14015 {
14016 bfd_put_32 (output_bfd,
14017 ADDIS_R2_R12 + PPC_HA (relocation),
14018 contents + rel->r_offset);
14019 bfd_put_32 (output_bfd,
14020 ADDI_R2_R2 + PPC_LO (relocation),
14021 contents + rel->r_offset + 4);
14022 }
14023 }
14024 }
14025 break;
14026
14027 case R_PPC64_REL16_HA:
14028 /* If we are generating a non-PIC executable, edit
14029 . 0: addis 2,12,.TOC.-0b@ha
14030 . addi 2,2,.TOC.-0b@l
14031 used by ELFv2 global entry points to set up r2, to
14032 . lis 2,.TOC.@ha
14033 . addi 2,2,.TOC.@l
14034 if .TOC. is in range. */
14035 if (!bfd_link_pic (info)
14036 && !info->traditional_format
14037 && !htab->opd_abi
14038 && rel->r_addend == d_offset
14039 && h != NULL && &h->elf == htab->elf.hgot
14040 && rel + 1 < relend
14041 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14042 && rel[1].r_offset == rel->r_offset + 4
14043 && rel[1].r_addend == rel->r_addend + 4
14044 && relocation + 0x80008000 <= 0xffffffff)
14045 {
14046 unsigned int insn1, insn2;
14047 bfd_vma offset = rel->r_offset - d_offset;
14048 insn1 = bfd_get_32 (output_bfd, contents + offset);
14049 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
14050 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14051 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14052 {
14053 r_type = R_PPC64_ADDR16_HA;
14054 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14055 rel->r_addend -= d_offset;
14056 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14057 rel[1].r_addend -= d_offset + 4;
14058 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
14059 }
14060 }
14061 break;
14062 }
14063
14064 /* Handle other relocations that tweak non-addend part of insn. */
14065 insn = 0;
14066 max_br_offset = 1 << 25;
14067 addend = rel->r_addend;
14068 reloc_dest = DEST_NORMAL;
14069 switch (r_type)
14070 {
14071 default:
14072 break;
14073
14074 case R_PPC64_TOCSAVE:
14075 if (relocation + addend == (rel->r_offset
14076 + input_section->output_offset
14077 + input_section->output_section->vma)
14078 && tocsave_find (htab, NO_INSERT,
14079 &local_syms, rel, input_bfd))
14080 {
14081 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14082 if (insn == NOP
14083 || insn == CROR_151515 || insn == CROR_313131)
14084 bfd_put_32 (input_bfd,
14085 STD_R2_0R1 + STK_TOC (htab),
14086 contents + rel->r_offset);
14087 }
14088 break;
14089
14090 /* Branch taken prediction relocations. */
14091 case R_PPC64_ADDR14_BRTAKEN:
14092 case R_PPC64_REL14_BRTAKEN:
14093 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14094 /* Fall through. */
14095
14096 /* Branch not taken prediction relocations. */
14097 case R_PPC64_ADDR14_BRNTAKEN:
14098 case R_PPC64_REL14_BRNTAKEN:
14099 insn |= bfd_get_32 (output_bfd,
14100 contents + rel->r_offset) & ~(0x01 << 21);
14101 /* Fall through. */
14102
14103 case R_PPC64_REL14:
14104 max_br_offset = 1 << 15;
14105 /* Fall through. */
14106
14107 case R_PPC64_REL24:
14108 /* Calls to functions with a different TOC, such as calls to
14109 shared objects, need to alter the TOC pointer. This is
14110 done using a linkage stub. A REL24 branching to these
14111 linkage stubs needs to be followed by a nop, as the nop
14112 will be replaced with an instruction to restore the TOC
14113 base pointer. */
14114 fdh = h;
14115 if (h != NULL
14116 && h->oh != NULL
14117 && h->oh->is_func_descriptor)
14118 fdh = ppc_follow_link (h->oh);
14119 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14120 htab);
14121 if (stub_entry != NULL
14122 && (stub_entry->stub_type == ppc_stub_plt_call
14123 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14124 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14125 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14126 {
14127 bfd_boolean can_plt_call = FALSE;
14128
14129 /* All of these stubs will modify r2, so there must be a
14130 branch and link followed by a nop. The nop is
14131 replaced by an insn to restore r2. */
14132 if (rel->r_offset + 8 <= input_section->size)
14133 {
14134 unsigned long br;
14135
14136 br = bfd_get_32 (input_bfd,
14137 contents + rel->r_offset);
14138 if ((br & 1) != 0)
14139 {
14140 unsigned long nop;
14141
14142 nop = bfd_get_32 (input_bfd,
14143 contents + rel->r_offset + 4);
14144 if (nop == NOP
14145 || nop == CROR_151515 || nop == CROR_313131)
14146 {
14147 if (h != NULL
14148 && (h == htab->tls_get_addr_fd
14149 || h == htab->tls_get_addr)
14150 && htab->params->tls_get_addr_opt)
14151 {
14152 /* Special stub used, leave nop alone. */
14153 }
14154 else
14155 bfd_put_32 (input_bfd,
14156 LD_R2_0R1 + STK_TOC (htab),
14157 contents + rel->r_offset + 4);
14158 can_plt_call = TRUE;
14159 }
14160 }
14161 }
14162
14163 if (!can_plt_call && h != NULL)
14164 {
14165 const char *name = h->elf.root.root.string;
14166
14167 if (*name == '.')
14168 ++name;
14169
14170 if (strncmp (name, "__libc_start_main", 17) == 0
14171 && (name[17] == 0 || name[17] == '@'))
14172 {
14173 /* Allow crt1 branch to go via a toc adjusting
14174 stub. Other calls that never return could do
14175 the same, if we could detect such. */
14176 can_plt_call = TRUE;
14177 }
14178 }
14179
14180 if (!can_plt_call)
14181 {
14182 /* g++ as of 20130507 emits self-calls without a
14183 following nop. This is arguably wrong since we
14184 have conflicting information. On the one hand a
14185 global symbol and on the other a local call
14186 sequence, but don't error for this special case.
14187 It isn't possible to cheaply verify we have
14188 exactly such a call. Allow all calls to the same
14189 section. */
14190 asection *code_sec = sec;
14191
14192 if (get_opd_info (sec) != NULL)
14193 {
14194 bfd_vma off = (relocation + addend
14195 - sec->output_section->vma
14196 - sec->output_offset);
14197
14198 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14199 }
14200 if (code_sec == input_section)
14201 can_plt_call = TRUE;
14202 }
14203
14204 if (!can_plt_call)
14205 {
14206 if (stub_entry->stub_type == ppc_stub_plt_call
14207 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14208 info->callbacks->einfo
14209 /* xgettext:c-format */
14210 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14211 "recompile with -fPIC\n"),
14212 input_bfd, input_section, rel->r_offset, sym_name);
14213 else
14214 info->callbacks->einfo
14215 /* xgettext:c-format */
14216 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14217 "(-mcmodel=small toc adjust stub)\n"),
14218 input_bfd, input_section, rel->r_offset, sym_name);
14219
14220 bfd_set_error (bfd_error_bad_value);
14221 ret = FALSE;
14222 }
14223
14224 if (can_plt_call
14225 && (stub_entry->stub_type == ppc_stub_plt_call
14226 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14227 unresolved_reloc = FALSE;
14228 }
14229
14230 if ((stub_entry == NULL
14231 || stub_entry->stub_type == ppc_stub_long_branch
14232 || stub_entry->stub_type == ppc_stub_plt_branch)
14233 && get_opd_info (sec) != NULL)
14234 {
14235 /* The branch destination is the value of the opd entry. */
14236 bfd_vma off = (relocation + addend
14237 - sec->output_section->vma
14238 - sec->output_offset);
14239 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14240 if (dest != (bfd_vma) -1)
14241 {
14242 relocation = dest;
14243 addend = 0;
14244 reloc_dest = DEST_OPD;
14245 }
14246 }
14247
14248 /* If the branch is out of reach we ought to have a long
14249 branch stub. */
14250 from = (rel->r_offset
14251 + input_section->output_offset
14252 + input_section->output_section->vma);
14253
14254 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14255 ? fdh->elf.other
14256 : sym->st_other);
14257
14258 if (stub_entry != NULL
14259 && (stub_entry->stub_type == ppc_stub_long_branch
14260 || stub_entry->stub_type == ppc_stub_plt_branch)
14261 && (r_type == R_PPC64_ADDR14_BRTAKEN
14262 || r_type == R_PPC64_ADDR14_BRNTAKEN
14263 || (relocation + addend - from + max_br_offset
14264 < 2 * max_br_offset)))
14265 /* Don't use the stub if this branch is in range. */
14266 stub_entry = NULL;
14267
14268 if (stub_entry != NULL)
14269 {
14270 /* Munge up the value and addend so that we call the stub
14271 rather than the procedure directly. */
14272 asection *stub_sec = stub_entry->group->stub_sec;
14273
14274 if (stub_entry->stub_type == ppc_stub_save_res)
14275 relocation += (stub_sec->output_offset
14276 + stub_sec->output_section->vma
14277 + stub_sec->size - htab->sfpr->size
14278 - htab->sfpr->output_offset
14279 - htab->sfpr->output_section->vma);
14280 else
14281 relocation = (stub_entry->stub_offset
14282 + stub_sec->output_offset
14283 + stub_sec->output_section->vma);
14284 addend = 0;
14285 reloc_dest = DEST_STUB;
14286
14287 if ((stub_entry->stub_type == ppc_stub_plt_call
14288 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14289 && (ALWAYS_EMIT_R2SAVE
14290 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14291 && rel + 1 < relend
14292 && rel[1].r_offset == rel->r_offset + 4
14293 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14294 relocation += 4;
14295 }
14296
14297 if (insn != 0)
14298 {
14299 if (is_isa_v2)
14300 {
14301 /* Set 'a' bit. This is 0b00010 in BO field for branch
14302 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14303 for branch on CTR insns (BO == 1a00t or 1a01t). */
14304 if ((insn & (0x14 << 21)) == (0x04 << 21))
14305 insn |= 0x02 << 21;
14306 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14307 insn |= 0x08 << 21;
14308 else
14309 break;
14310 }
14311 else
14312 {
14313 /* Invert 'y' bit if not the default. */
14314 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14315 insn ^= 0x01 << 21;
14316 }
14317
14318 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
14319 }
14320
14321 /* NOP out calls to undefined weak functions.
14322 We can thus call a weak function without first
14323 checking whether the function is defined. */
14324 else if (h != NULL
14325 && h->elf.root.type == bfd_link_hash_undefweak
14326 && h->elf.dynindx == -1
14327 && r_type == R_PPC64_REL24
14328 && relocation == 0
14329 && addend == 0)
14330 {
14331 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
14332 goto copy_reloc;
14333 }
14334 break;
14335 }
14336
14337 /* Set `addend'. */
14338 tls_type = 0;
14339 switch (r_type)
14340 {
14341 default:
14342 info->callbacks->einfo
14343 /* xgettext:c-format */
14344 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14345 input_bfd, (int) r_type, sym_name);
14346
14347 bfd_set_error (bfd_error_bad_value);
14348 ret = FALSE;
14349 goto copy_reloc;
14350
14351 case R_PPC64_NONE:
14352 case R_PPC64_TLS:
14353 case R_PPC64_TLSGD:
14354 case R_PPC64_TLSLD:
14355 case R_PPC64_TOCSAVE:
14356 case R_PPC64_GNU_VTINHERIT:
14357 case R_PPC64_GNU_VTENTRY:
14358 case R_PPC64_ENTRY:
14359 goto copy_reloc;
14360
14361 /* GOT16 relocations. Like an ADDR16 using the symbol's
14362 address in the GOT as relocation value instead of the
14363 symbol's value itself. Also, create a GOT entry for the
14364 symbol and put the symbol value there. */
14365 case R_PPC64_GOT_TLSGD16:
14366 case R_PPC64_GOT_TLSGD16_LO:
14367 case R_PPC64_GOT_TLSGD16_HI:
14368 case R_PPC64_GOT_TLSGD16_HA:
14369 tls_type = TLS_TLS | TLS_GD;
14370 goto dogot;
14371
14372 case R_PPC64_GOT_TLSLD16:
14373 case R_PPC64_GOT_TLSLD16_LO:
14374 case R_PPC64_GOT_TLSLD16_HI:
14375 case R_PPC64_GOT_TLSLD16_HA:
14376 tls_type = TLS_TLS | TLS_LD;
14377 goto dogot;
14378
14379 case R_PPC64_GOT_TPREL16_DS:
14380 case R_PPC64_GOT_TPREL16_LO_DS:
14381 case R_PPC64_GOT_TPREL16_HI:
14382 case R_PPC64_GOT_TPREL16_HA:
14383 tls_type = TLS_TLS | TLS_TPREL;
14384 goto dogot;
14385
14386 case R_PPC64_GOT_DTPREL16_DS:
14387 case R_PPC64_GOT_DTPREL16_LO_DS:
14388 case R_PPC64_GOT_DTPREL16_HI:
14389 case R_PPC64_GOT_DTPREL16_HA:
14390 tls_type = TLS_TLS | TLS_DTPREL;
14391 goto dogot;
14392
14393 case R_PPC64_GOT16:
14394 case R_PPC64_GOT16_LO:
14395 case R_PPC64_GOT16_HI:
14396 case R_PPC64_GOT16_HA:
14397 case R_PPC64_GOT16_DS:
14398 case R_PPC64_GOT16_LO_DS:
14399 dogot:
14400 {
14401 /* Relocation is to the entry for this symbol in the global
14402 offset table. */
14403 asection *got;
14404 bfd_vma *offp;
14405 bfd_vma off;
14406 unsigned long indx = 0;
14407 struct got_entry *ent;
14408
14409 if (tls_type == (TLS_TLS | TLS_LD)
14410 && (h == NULL
14411 || !h->elf.def_dynamic))
14412 ent = ppc64_tlsld_got (input_bfd);
14413 else
14414 {
14415
14416 if (h != NULL)
14417 {
14418 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14419 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14420 &h->elf)
14421 || (bfd_link_pic (info)
14422 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14423 /* This is actually a static link, or it is a
14424 -Bsymbolic link and the symbol is defined
14425 locally, or the symbol was forced to be local
14426 because of a version file. */
14427 ;
14428 else
14429 {
14430 BFD_ASSERT (h->elf.dynindx != -1);
14431 indx = h->elf.dynindx;
14432 unresolved_reloc = FALSE;
14433 }
14434 ent = h->elf.got.glist;
14435 }
14436 else
14437 {
14438 if (local_got_ents == NULL)
14439 abort ();
14440 ent = local_got_ents[r_symndx];
14441 }
14442
14443 for (; ent != NULL; ent = ent->next)
14444 if (ent->addend == orig_rel.r_addend
14445 && ent->owner == input_bfd
14446 && ent->tls_type == tls_type)
14447 break;
14448 }
14449
14450 if (ent == NULL)
14451 abort ();
14452 if (ent->is_indirect)
14453 ent = ent->got.ent;
14454 offp = &ent->got.offset;
14455 got = ppc64_elf_tdata (ent->owner)->got;
14456 if (got == NULL)
14457 abort ();
14458
14459 /* The offset must always be a multiple of 8. We use the
14460 least significant bit to record whether we have already
14461 processed this entry. */
14462 off = *offp;
14463 if ((off & 1) != 0)
14464 off &= ~1;
14465 else
14466 {
14467 /* Generate relocs for the dynamic linker, except in
14468 the case of TLSLD where we'll use one entry per
14469 module. */
14470 asection *relgot;
14471 bfd_boolean ifunc;
14472
14473 *offp = off | 1;
14474 relgot = NULL;
14475 ifunc = (h != NULL
14476 ? h->elf.type == STT_GNU_IFUNC
14477 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14478 if (ifunc)
14479 relgot = htab->elf.irelplt;
14480 else if ((bfd_link_pic (info) || indx != 0)
14481 && (h == NULL
14482 || (tls_type == (TLS_TLS | TLS_LD)
14483 && !h->elf.def_dynamic)
14484 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14485 || h->elf.root.type != bfd_link_hash_undefweak))
14486 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14487 if (relgot != NULL)
14488 {
14489 outrel.r_offset = (got->output_section->vma
14490 + got->output_offset
14491 + off);
14492 outrel.r_addend = addend;
14493 if (tls_type & (TLS_LD | TLS_GD))
14494 {
14495 outrel.r_addend = 0;
14496 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14497 if (tls_type == (TLS_TLS | TLS_GD))
14498 {
14499 loc = relgot->contents;
14500 loc += (relgot->reloc_count++
14501 * sizeof (Elf64_External_Rela));
14502 bfd_elf64_swap_reloca_out (output_bfd,
14503 &outrel, loc);
14504 outrel.r_offset += 8;
14505 outrel.r_addend = addend;
14506 outrel.r_info
14507 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14508 }
14509 }
14510 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14511 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14512 else if (tls_type == (TLS_TLS | TLS_TPREL))
14513 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14514 else if (indx != 0)
14515 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14516 else
14517 {
14518 if (ifunc)
14519 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14520 else
14521 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14522
14523 /* Write the .got section contents for the sake
14524 of prelink. */
14525 loc = got->contents + off;
14526 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14527 loc);
14528 }
14529
14530 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14531 {
14532 outrel.r_addend += relocation;
14533 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14534 {
14535 if (htab->elf.tls_sec == NULL)
14536 outrel.r_addend = 0;
14537 else
14538 outrel.r_addend -= htab->elf.tls_sec->vma;
14539 }
14540 }
14541 loc = relgot->contents;
14542 loc += (relgot->reloc_count++
14543 * sizeof (Elf64_External_Rela));
14544 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14545 }
14546
14547 /* Init the .got section contents here if we're not
14548 emitting a reloc. */
14549 else
14550 {
14551 relocation += addend;
14552 if (tls_type == (TLS_TLS | TLS_LD))
14553 relocation = 1;
14554 else if (tls_type != 0)
14555 {
14556 if (htab->elf.tls_sec == NULL)
14557 relocation = 0;
14558 else
14559 {
14560 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14561 if (tls_type == (TLS_TLS | TLS_TPREL))
14562 relocation += DTP_OFFSET - TP_OFFSET;
14563 }
14564
14565 if (tls_type == (TLS_TLS | TLS_GD))
14566 {
14567 bfd_put_64 (output_bfd, relocation,
14568 got->contents + off + 8);
14569 relocation = 1;
14570 }
14571 }
14572
14573 bfd_put_64 (output_bfd, relocation,
14574 got->contents + off);
14575 }
14576 }
14577
14578 if (off >= (bfd_vma) -2)
14579 abort ();
14580
14581 relocation = got->output_section->vma + got->output_offset + off;
14582 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14583 }
14584 break;
14585
14586 case R_PPC64_PLT16_HA:
14587 case R_PPC64_PLT16_HI:
14588 case R_PPC64_PLT16_LO:
14589 case R_PPC64_PLT32:
14590 case R_PPC64_PLT64:
14591 /* Relocation is to the entry for this symbol in the
14592 procedure linkage table. */
14593 {
14594 struct plt_entry **plt_list = NULL;
14595 if (h != NULL)
14596 plt_list = &h->elf.plt.plist;
14597 else if (local_got_ents != NULL)
14598 {
14599 struct plt_entry **local_plt = (struct plt_entry **)
14600 (local_got_ents + symtab_hdr->sh_info);
14601 unsigned char *local_got_tls_masks = (unsigned char *)
14602 (local_plt + symtab_hdr->sh_info);
14603 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14604 plt_list = local_plt + r_symndx;
14605 }
14606 if (plt_list)
14607 {
14608 struct plt_entry *ent;
14609
14610 for (ent = *plt_list; ent != NULL; ent = ent->next)
14611 if (ent->plt.offset != (bfd_vma) -1
14612 && ent->addend == orig_rel.r_addend)
14613 {
14614 asection *plt;
14615
14616 plt = htab->elf.splt;
14617 if (!htab->elf.dynamic_sections_created
14618 || h == NULL
14619 || h->elf.dynindx == -1)
14620 plt = htab->elf.iplt;
14621 relocation = (plt->output_section->vma
14622 + plt->output_offset
14623 + ent->plt.offset);
14624 addend = 0;
14625 unresolved_reloc = FALSE;
14626 break;
14627 }
14628 }
14629 }
14630 break;
14631
14632 case R_PPC64_TOC:
14633 /* Relocation value is TOC base. */
14634 relocation = TOCstart;
14635 if (r_symndx == STN_UNDEF)
14636 relocation += htab->sec_info[input_section->id].toc_off;
14637 else if (unresolved_reloc)
14638 ;
14639 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14640 relocation += htab->sec_info[sec->id].toc_off;
14641 else
14642 unresolved_reloc = TRUE;
14643 goto dodyn;
14644
14645 /* TOC16 relocs. We want the offset relative to the TOC base,
14646 which is the address of the start of the TOC plus 0x8000.
14647 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14648 in this order. */
14649 case R_PPC64_TOC16:
14650 case R_PPC64_TOC16_LO:
14651 case R_PPC64_TOC16_HI:
14652 case R_PPC64_TOC16_DS:
14653 case R_PPC64_TOC16_LO_DS:
14654 case R_PPC64_TOC16_HA:
14655 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14656 break;
14657
14658 /* Relocate against the beginning of the section. */
14659 case R_PPC64_SECTOFF:
14660 case R_PPC64_SECTOFF_LO:
14661 case R_PPC64_SECTOFF_HI:
14662 case R_PPC64_SECTOFF_DS:
14663 case R_PPC64_SECTOFF_LO_DS:
14664 case R_PPC64_SECTOFF_HA:
14665 if (sec != NULL)
14666 addend -= sec->output_section->vma;
14667 break;
14668
14669 case R_PPC64_REL16:
14670 case R_PPC64_REL16_LO:
14671 case R_PPC64_REL16_HI:
14672 case R_PPC64_REL16_HA:
14673 case R_PPC64_REL16DX_HA:
14674 break;
14675
14676 case R_PPC64_REL14:
14677 case R_PPC64_REL14_BRNTAKEN:
14678 case R_PPC64_REL14_BRTAKEN:
14679 case R_PPC64_REL24:
14680 break;
14681
14682 case R_PPC64_TPREL16:
14683 case R_PPC64_TPREL16_LO:
14684 case R_PPC64_TPREL16_HI:
14685 case R_PPC64_TPREL16_HA:
14686 case R_PPC64_TPREL16_DS:
14687 case R_PPC64_TPREL16_LO_DS:
14688 case R_PPC64_TPREL16_HIGH:
14689 case R_PPC64_TPREL16_HIGHA:
14690 case R_PPC64_TPREL16_HIGHER:
14691 case R_PPC64_TPREL16_HIGHERA:
14692 case R_PPC64_TPREL16_HIGHEST:
14693 case R_PPC64_TPREL16_HIGHESTA:
14694 if (h != NULL
14695 && h->elf.root.type == bfd_link_hash_undefweak
14696 && h->elf.dynindx == -1)
14697 {
14698 /* Make this relocation against an undefined weak symbol
14699 resolve to zero. This is really just a tweak, since
14700 code using weak externs ought to check that they are
14701 defined before using them. */
14702 bfd_byte *p = contents + rel->r_offset - d_offset;
14703
14704 insn = bfd_get_32 (output_bfd, p);
14705 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14706 if (insn != 0)
14707 bfd_put_32 (output_bfd, insn, p);
14708 break;
14709 }
14710 if (htab->elf.tls_sec != NULL)
14711 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14712 if (bfd_link_pic (info))
14713 /* The TPREL16 relocs shouldn't really be used in shared
14714 libs as they will result in DT_TEXTREL being set, but
14715 support them anyway. */
14716 goto dodyn;
14717 break;
14718
14719 case R_PPC64_DTPREL16:
14720 case R_PPC64_DTPREL16_LO:
14721 case R_PPC64_DTPREL16_HI:
14722 case R_PPC64_DTPREL16_HA:
14723 case R_PPC64_DTPREL16_DS:
14724 case R_PPC64_DTPREL16_LO_DS:
14725 case R_PPC64_DTPREL16_HIGH:
14726 case R_PPC64_DTPREL16_HIGHA:
14727 case R_PPC64_DTPREL16_HIGHER:
14728 case R_PPC64_DTPREL16_HIGHERA:
14729 case R_PPC64_DTPREL16_HIGHEST:
14730 case R_PPC64_DTPREL16_HIGHESTA:
14731 if (htab->elf.tls_sec != NULL)
14732 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14733 break;
14734
14735 case R_PPC64_ADDR64_LOCAL:
14736 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14737 ? h->elf.other
14738 : sym->st_other);
14739 break;
14740
14741 case R_PPC64_DTPMOD64:
14742 relocation = 1;
14743 addend = 0;
14744 goto dodyn;
14745
14746 case R_PPC64_TPREL64:
14747 if (htab->elf.tls_sec != NULL)
14748 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14749 goto dodyn;
14750
14751 case R_PPC64_DTPREL64:
14752 if (htab->elf.tls_sec != NULL)
14753 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14754 /* Fall through. */
14755
14756 /* Relocations that may need to be propagated if this is a
14757 dynamic object. */
14758 case R_PPC64_REL30:
14759 case R_PPC64_REL32:
14760 case R_PPC64_REL64:
14761 case R_PPC64_ADDR14:
14762 case R_PPC64_ADDR14_BRNTAKEN:
14763 case R_PPC64_ADDR14_BRTAKEN:
14764 case R_PPC64_ADDR16:
14765 case R_PPC64_ADDR16_DS:
14766 case R_PPC64_ADDR16_HA:
14767 case R_PPC64_ADDR16_HI:
14768 case R_PPC64_ADDR16_HIGH:
14769 case R_PPC64_ADDR16_HIGHA:
14770 case R_PPC64_ADDR16_HIGHER:
14771 case R_PPC64_ADDR16_HIGHERA:
14772 case R_PPC64_ADDR16_HIGHEST:
14773 case R_PPC64_ADDR16_HIGHESTA:
14774 case R_PPC64_ADDR16_LO:
14775 case R_PPC64_ADDR16_LO_DS:
14776 case R_PPC64_ADDR24:
14777 case R_PPC64_ADDR32:
14778 case R_PPC64_ADDR64:
14779 case R_PPC64_UADDR16:
14780 case R_PPC64_UADDR32:
14781 case R_PPC64_UADDR64:
14782 dodyn:
14783 if ((input_section->flags & SEC_ALLOC) == 0)
14784 break;
14785
14786 if (NO_OPD_RELOCS && is_opd)
14787 break;
14788
14789 if (bfd_link_pic (info)
14790 ? ((h != NULL && pc_dynrelocs (h))
14791 || must_be_dyn_reloc (info, r_type))
14792 : (h != NULL
14793 ? h->dyn_relocs != NULL
14794 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14795 {
14796 bfd_boolean skip, relocate;
14797 asection *sreloc;
14798 bfd_vma out_off;
14799
14800 /* When generating a dynamic object, these relocations
14801 are copied into the output file to be resolved at run
14802 time. */
14803
14804 skip = FALSE;
14805 relocate = FALSE;
14806
14807 out_off = _bfd_elf_section_offset (output_bfd, info,
14808 input_section, rel->r_offset);
14809 if (out_off == (bfd_vma) -1)
14810 skip = TRUE;
14811 else if (out_off == (bfd_vma) -2)
14812 skip = TRUE, relocate = TRUE;
14813 out_off += (input_section->output_section->vma
14814 + input_section->output_offset);
14815 outrel.r_offset = out_off;
14816 outrel.r_addend = rel->r_addend;
14817
14818 /* Optimize unaligned reloc use. */
14819 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14820 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14821 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14822 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14823 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14824 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14825 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14826 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14827 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14828
14829 if (skip)
14830 memset (&outrel, 0, sizeof outrel);
14831 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14832 && !is_opd
14833 && r_type != R_PPC64_TOC)
14834 {
14835 BFD_ASSERT (h->elf.dynindx != -1);
14836 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14837 }
14838 else
14839 {
14840 /* This symbol is local, or marked to become local,
14841 or this is an opd section reloc which must point
14842 at a local function. */
14843 outrel.r_addend += relocation;
14844 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14845 {
14846 if (is_opd && h != NULL)
14847 {
14848 /* Lie about opd entries. This case occurs
14849 when building shared libraries and we
14850 reference a function in another shared
14851 lib. The same thing happens for a weak
14852 definition in an application that's
14853 overridden by a strong definition in a
14854 shared lib. (I believe this is a generic
14855 bug in binutils handling of weak syms.)
14856 In these cases we won't use the opd
14857 entry in this lib. */
14858 unresolved_reloc = FALSE;
14859 }
14860 if (!is_opd
14861 && r_type == R_PPC64_ADDR64
14862 && (h != NULL
14863 ? h->elf.type == STT_GNU_IFUNC
14864 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14865 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14866 else
14867 {
14868 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14869
14870 /* We need to relocate .opd contents for ld.so.
14871 Prelink also wants simple and consistent rules
14872 for relocs. This make all RELATIVE relocs have
14873 *r_offset equal to r_addend. */
14874 relocate = TRUE;
14875 }
14876 }
14877 else
14878 {
14879 long indx = 0;
14880
14881 if (h != NULL
14882 ? h->elf.type == STT_GNU_IFUNC
14883 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14884 {
14885 info->callbacks->einfo
14886 /* xgettext:c-format */
14887 (_("%P: %H: %s for indirect "
14888 "function `%T' unsupported\n"),
14889 input_bfd, input_section, rel->r_offset,
14890 ppc64_elf_howto_table[r_type]->name,
14891 sym_name);
14892 ret = FALSE;
14893 }
14894 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14895 ;
14896 else if (sec == NULL || sec->owner == NULL)
14897 {
14898 bfd_set_error (bfd_error_bad_value);
14899 return FALSE;
14900 }
14901 else
14902 {
14903 asection *osec;
14904
14905 osec = sec->output_section;
14906 indx = elf_section_data (osec)->dynindx;
14907
14908 if (indx == 0)
14909 {
14910 if ((osec->flags & SEC_READONLY) == 0
14911 && htab->elf.data_index_section != NULL)
14912 osec = htab->elf.data_index_section;
14913 else
14914 osec = htab->elf.text_index_section;
14915 indx = elf_section_data (osec)->dynindx;
14916 }
14917 BFD_ASSERT (indx != 0);
14918
14919 /* We are turning this relocation into one
14920 against a section symbol, so subtract out
14921 the output section's address but not the
14922 offset of the input section in the output
14923 section. */
14924 outrel.r_addend -= osec->vma;
14925 }
14926
14927 outrel.r_info = ELF64_R_INFO (indx, r_type);
14928 }
14929 }
14930
14931 sreloc = elf_section_data (input_section)->sreloc;
14932 if (h != NULL
14933 ? h->elf.type == STT_GNU_IFUNC
14934 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14935 sreloc = htab->elf.irelplt;
14936 if (sreloc == NULL)
14937 abort ();
14938
14939 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14940 >= sreloc->size)
14941 abort ();
14942 loc = sreloc->contents;
14943 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14944 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14945
14946 /* If this reloc is against an external symbol, it will
14947 be computed at runtime, so there's no need to do
14948 anything now. However, for the sake of prelink ensure
14949 that the section contents are a known value. */
14950 if (! relocate)
14951 {
14952 unresolved_reloc = FALSE;
14953 /* The value chosen here is quite arbitrary as ld.so
14954 ignores section contents except for the special
14955 case of .opd where the contents might be accessed
14956 before relocation. Choose zero, as that won't
14957 cause reloc overflow. */
14958 relocation = 0;
14959 addend = 0;
14960 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14961 to improve backward compatibility with older
14962 versions of ld. */
14963 if (r_type == R_PPC64_ADDR64)
14964 addend = outrel.r_addend;
14965 /* Adjust pc_relative relocs to have zero in *r_offset. */
14966 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14967 addend = (input_section->output_section->vma
14968 + input_section->output_offset
14969 + rel->r_offset);
14970 }
14971 }
14972 break;
14973
14974 case R_PPC64_COPY:
14975 case R_PPC64_GLOB_DAT:
14976 case R_PPC64_JMP_SLOT:
14977 case R_PPC64_JMP_IREL:
14978 case R_PPC64_RELATIVE:
14979 /* We shouldn't ever see these dynamic relocs in relocatable
14980 files. */
14981 /* Fall through. */
14982
14983 case R_PPC64_PLTGOT16:
14984 case R_PPC64_PLTGOT16_DS:
14985 case R_PPC64_PLTGOT16_HA:
14986 case R_PPC64_PLTGOT16_HI:
14987 case R_PPC64_PLTGOT16_LO:
14988 case R_PPC64_PLTGOT16_LO_DS:
14989 case R_PPC64_PLTREL32:
14990 case R_PPC64_PLTREL64:
14991 /* These ones haven't been implemented yet. */
14992
14993 info->callbacks->einfo
14994 /* xgettext:c-format */
14995 (_("%P: %B: %s is not supported for `%T'\n"),
14996 input_bfd,
14997 ppc64_elf_howto_table[r_type]->name, sym_name);
14998
14999 bfd_set_error (bfd_error_invalid_operation);
15000 ret = FALSE;
15001 goto copy_reloc;
15002 }
15003
15004 /* Multi-instruction sequences that access the TOC can be
15005 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15006 to nop; addi rb,r2,x; */
15007 switch (r_type)
15008 {
15009 default:
15010 break;
15011
15012 case R_PPC64_GOT_TLSLD16_HI:
15013 case R_PPC64_GOT_TLSGD16_HI:
15014 case R_PPC64_GOT_TPREL16_HI:
15015 case R_PPC64_GOT_DTPREL16_HI:
15016 case R_PPC64_GOT16_HI:
15017 case R_PPC64_TOC16_HI:
15018 /* These relocs would only be useful if building up an
15019 offset to later add to r2, perhaps in an indexed
15020 addressing mode instruction. Don't try to optimize.
15021 Unfortunately, the possibility of someone building up an
15022 offset like this or even with the HA relocs, means that
15023 we need to check the high insn when optimizing the low
15024 insn. */
15025 break;
15026
15027 case R_PPC64_GOT_TLSLD16_HA:
15028 case R_PPC64_GOT_TLSGD16_HA:
15029 case R_PPC64_GOT_TPREL16_HA:
15030 case R_PPC64_GOT_DTPREL16_HA:
15031 case R_PPC64_GOT16_HA:
15032 case R_PPC64_TOC16_HA:
15033 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15034 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15035 {
15036 bfd_byte *p = contents + (rel->r_offset & ~3);
15037 bfd_put_32 (input_bfd, NOP, p);
15038 }
15039 break;
15040
15041 case R_PPC64_GOT_TLSLD16_LO:
15042 case R_PPC64_GOT_TLSGD16_LO:
15043 case R_PPC64_GOT_TPREL16_LO_DS:
15044 case R_PPC64_GOT_DTPREL16_LO_DS:
15045 case R_PPC64_GOT16_LO:
15046 case R_PPC64_GOT16_LO_DS:
15047 case R_PPC64_TOC16_LO:
15048 case R_PPC64_TOC16_LO_DS:
15049 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15050 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15051 {
15052 bfd_byte *p = contents + (rel->r_offset & ~3);
15053 insn = bfd_get_32 (input_bfd, p);
15054 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15055 {
15056 /* Transform addic to addi when we change reg. */
15057 insn &= ~((0x3f << 26) | (0x1f << 16));
15058 insn |= (14u << 26) | (2 << 16);
15059 }
15060 else
15061 {
15062 insn &= ~(0x1f << 16);
15063 insn |= 2 << 16;
15064 }
15065 bfd_put_32 (input_bfd, insn, p);
15066 }
15067 break;
15068 }
15069
15070 /* Do any further special processing. */
15071 howto = ppc64_elf_howto_table[(int) r_type];
15072 switch (r_type)
15073 {
15074 default:
15075 break;
15076
15077 case R_PPC64_REL16_HA:
15078 case R_PPC64_REL16DX_HA:
15079 case R_PPC64_ADDR16_HA:
15080 case R_PPC64_ADDR16_HIGHA:
15081 case R_PPC64_ADDR16_HIGHERA:
15082 case R_PPC64_ADDR16_HIGHESTA:
15083 case R_PPC64_TOC16_HA:
15084 case R_PPC64_SECTOFF_HA:
15085 case R_PPC64_TPREL16_HA:
15086 case R_PPC64_TPREL16_HIGHA:
15087 case R_PPC64_TPREL16_HIGHERA:
15088 case R_PPC64_TPREL16_HIGHESTA:
15089 case R_PPC64_DTPREL16_HA:
15090 case R_PPC64_DTPREL16_HIGHA:
15091 case R_PPC64_DTPREL16_HIGHERA:
15092 case R_PPC64_DTPREL16_HIGHESTA:
15093 /* It's just possible that this symbol is a weak symbol
15094 that's not actually defined anywhere. In that case,
15095 'sec' would be NULL, and we should leave the symbol
15096 alone (it will be set to zero elsewhere in the link). */
15097 if (sec == NULL)
15098 break;
15099 /* Fall through. */
15100
15101 case R_PPC64_GOT16_HA:
15102 case R_PPC64_PLTGOT16_HA:
15103 case R_PPC64_PLT16_HA:
15104 case R_PPC64_GOT_TLSGD16_HA:
15105 case R_PPC64_GOT_TLSLD16_HA:
15106 case R_PPC64_GOT_TPREL16_HA:
15107 case R_PPC64_GOT_DTPREL16_HA:
15108 /* Add 0x10000 if sign bit in 0:15 is set.
15109 Bits 0:15 are not used. */
15110 addend += 0x8000;
15111 break;
15112
15113 case R_PPC64_ADDR16_DS:
15114 case R_PPC64_ADDR16_LO_DS:
15115 case R_PPC64_GOT16_DS:
15116 case R_PPC64_GOT16_LO_DS:
15117 case R_PPC64_PLT16_LO_DS:
15118 case R_PPC64_SECTOFF_DS:
15119 case R_PPC64_SECTOFF_LO_DS:
15120 case R_PPC64_TOC16_DS:
15121 case R_PPC64_TOC16_LO_DS:
15122 case R_PPC64_PLTGOT16_DS:
15123 case R_PPC64_PLTGOT16_LO_DS:
15124 case R_PPC64_GOT_TPREL16_DS:
15125 case R_PPC64_GOT_TPREL16_LO_DS:
15126 case R_PPC64_GOT_DTPREL16_DS:
15127 case R_PPC64_GOT_DTPREL16_LO_DS:
15128 case R_PPC64_TPREL16_DS:
15129 case R_PPC64_TPREL16_LO_DS:
15130 case R_PPC64_DTPREL16_DS:
15131 case R_PPC64_DTPREL16_LO_DS:
15132 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15133 mask = 3;
15134 /* If this reloc is against an lq, lxv, or stxv insn, then
15135 the value must be a multiple of 16. This is somewhat of
15136 a hack, but the "correct" way to do this by defining _DQ
15137 forms of all the _DS relocs bloats all reloc switches in
15138 this file. It doesn't make much sense to use these
15139 relocs in data, so testing the insn should be safe. */
15140 if ((insn & (0x3f << 26)) == (56u << 26)
15141 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15142 mask = 15;
15143 relocation += addend;
15144 addend = insn & (mask ^ 3);
15145 if ((relocation & mask) != 0)
15146 {
15147 relocation ^= relocation & mask;
15148 info->callbacks->einfo
15149 /* xgettext:c-format */
15150 (_("%P: %H: error: %s not a multiple of %u\n"),
15151 input_bfd, input_section, rel->r_offset,
15152 howto->name,
15153 mask + 1);
15154 bfd_set_error (bfd_error_bad_value);
15155 ret = FALSE;
15156 goto copy_reloc;
15157 }
15158 break;
15159 }
15160
15161 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15162 because such sections are not SEC_ALLOC and thus ld.so will
15163 not process them. */
15164 if (unresolved_reloc
15165 && !((input_section->flags & SEC_DEBUGGING) != 0
15166 && h->elf.def_dynamic)
15167 && _bfd_elf_section_offset (output_bfd, info, input_section,
15168 rel->r_offset) != (bfd_vma) -1)
15169 {
15170 info->callbacks->einfo
15171 /* xgettext:c-format */
15172 (_("%P: %H: unresolvable %s against `%T'\n"),
15173 input_bfd, input_section, rel->r_offset,
15174 howto->name,
15175 h->elf.root.root.string);
15176 ret = FALSE;
15177 }
15178
15179 /* 16-bit fields in insns mostly have signed values, but a
15180 few insns have 16-bit unsigned values. Really, we should
15181 have different reloc types. */
15182 if (howto->complain_on_overflow != complain_overflow_dont
15183 && howto->dst_mask == 0xffff
15184 && (input_section->flags & SEC_CODE) != 0)
15185 {
15186 enum complain_overflow complain = complain_overflow_signed;
15187
15188 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15189 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15190 complain = complain_overflow_bitfield;
15191 else if (howto->rightshift == 0
15192 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15193 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15194 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15195 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15196 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15197 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15198 complain = complain_overflow_unsigned;
15199 if (howto->complain_on_overflow != complain)
15200 {
15201 alt_howto = *howto;
15202 alt_howto.complain_on_overflow = complain;
15203 howto = &alt_howto;
15204 }
15205 }
15206
15207 if (r_type == R_PPC64_REL16DX_HA)
15208 {
15209 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15210 if (rel->r_offset + 4 > input_section->size)
15211 r = bfd_reloc_outofrange;
15212 else
15213 {
15214 relocation += addend;
15215 relocation -= (rel->r_offset
15216 + input_section->output_offset
15217 + input_section->output_section->vma);
15218 relocation = (bfd_signed_vma) relocation >> 16;
15219 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15220 insn &= ~0x1fffc1;
15221 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15222 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15223 r = bfd_reloc_ok;
15224 if (relocation + 0x8000 > 0xffff)
15225 r = bfd_reloc_overflow;
15226 }
15227 }
15228 else
15229 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15230 rel->r_offset, relocation, addend);
15231
15232 if (r != bfd_reloc_ok)
15233 {
15234 char *more_info = NULL;
15235 const char *reloc_name = howto->name;
15236
15237 if (reloc_dest != DEST_NORMAL)
15238 {
15239 more_info = bfd_malloc (strlen (reloc_name) + 8);
15240 if (more_info != NULL)
15241 {
15242 strcpy (more_info, reloc_name);
15243 strcat (more_info, (reloc_dest == DEST_OPD
15244 ? " (OPD)" : " (stub)"));
15245 reloc_name = more_info;
15246 }
15247 }
15248
15249 if (r == bfd_reloc_overflow)
15250 {
15251 /* On code like "if (foo) foo();" don't report overflow
15252 on a branch to zero when foo is undefined. */
15253 if (!warned
15254 && (reloc_dest == DEST_STUB
15255 || !(h != NULL
15256 && (h->elf.root.type == bfd_link_hash_undefweak
15257 || h->elf.root.type == bfd_link_hash_undefined)
15258 && is_branch_reloc (r_type))))
15259 info->callbacks->reloc_overflow (info, &h->elf.root,
15260 sym_name, reloc_name,
15261 orig_rel.r_addend,
15262 input_bfd, input_section,
15263 rel->r_offset);
15264 }
15265 else
15266 {
15267 info->callbacks->einfo
15268 /* xgettext:c-format */
15269 (_("%P: %H: %s against `%T': error %d\n"),
15270 input_bfd, input_section, rel->r_offset,
15271 reloc_name, sym_name, (int) r);
15272 ret = FALSE;
15273 }
15274 if (more_info != NULL)
15275 free (more_info);
15276 }
15277 copy_reloc:
15278 if (wrel != rel)
15279 *wrel = *rel;
15280 }
15281
15282 if (wrel != rel)
15283 {
15284 Elf_Internal_Shdr *rel_hdr;
15285 size_t deleted = rel - wrel;
15286
15287 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15288 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15289 if (rel_hdr->sh_size == 0)
15290 {
15291 /* It is too late to remove an empty reloc section. Leave
15292 one NONE reloc.
15293 ??? What is wrong with an empty section??? */
15294 rel_hdr->sh_size = rel_hdr->sh_entsize;
15295 deleted -= 1;
15296 }
15297 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15298 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15299 input_section->reloc_count -= deleted;
15300 }
15301
15302 /* If we're emitting relocations, then shortly after this function
15303 returns, reloc offsets and addends for this section will be
15304 adjusted. Worse, reloc symbol indices will be for the output
15305 file rather than the input. Save a copy of the relocs for
15306 opd_entry_value. */
15307 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15308 {
15309 bfd_size_type amt;
15310 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15311 rel = bfd_alloc (input_bfd, amt);
15312 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15313 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15314 if (rel == NULL)
15315 return FALSE;
15316 memcpy (rel, relocs, amt);
15317 }
15318 return ret;
15319 }
15320
15321 /* Adjust the value of any local symbols in opd sections. */
15322
15323 static int
15324 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15325 const char *name ATTRIBUTE_UNUSED,
15326 Elf_Internal_Sym *elfsym,
15327 asection *input_sec,
15328 struct elf_link_hash_entry *h)
15329 {
15330 struct _opd_sec_data *opd;
15331 long adjust;
15332 bfd_vma value;
15333
15334 if (h != NULL)
15335 return 1;
15336
15337 opd = get_opd_info (input_sec);
15338 if (opd == NULL || opd->adjust == NULL)
15339 return 1;
15340
15341 value = elfsym->st_value - input_sec->output_offset;
15342 if (!bfd_link_relocatable (info))
15343 value -= input_sec->output_section->vma;
15344
15345 adjust = opd->adjust[OPD_NDX (value)];
15346 if (adjust == -1)
15347 return 2;
15348
15349 elfsym->st_value += adjust;
15350 return 1;
15351 }
15352
15353 /* Finish up dynamic symbol handling. We set the contents of various
15354 dynamic sections here. */
15355
15356 static bfd_boolean
15357 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15358 struct bfd_link_info *info,
15359 struct elf_link_hash_entry *h,
15360 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15361 {
15362 struct ppc_link_hash_table *htab;
15363 struct plt_entry *ent;
15364 Elf_Internal_Rela rela;
15365 bfd_byte *loc;
15366
15367 htab = ppc_hash_table (info);
15368 if (htab == NULL)
15369 return FALSE;
15370
15371 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15372 if (ent->plt.offset != (bfd_vma) -1)
15373 {
15374 /* This symbol has an entry in the procedure linkage
15375 table. Set it up. */
15376 if (!htab->elf.dynamic_sections_created
15377 || h->dynindx == -1)
15378 {
15379 BFD_ASSERT (h->type == STT_GNU_IFUNC
15380 && h->def_regular
15381 && (h->root.type == bfd_link_hash_defined
15382 || h->root.type == bfd_link_hash_defweak));
15383 rela.r_offset = (htab->elf.iplt->output_section->vma
15384 + htab->elf.iplt->output_offset
15385 + ent->plt.offset);
15386 if (htab->opd_abi)
15387 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15388 else
15389 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15390 rela.r_addend = (h->root.u.def.value
15391 + h->root.u.def.section->output_offset
15392 + h->root.u.def.section->output_section->vma
15393 + ent->addend);
15394 loc = (htab->elf.irelplt->contents
15395 + (htab->elf.irelplt->reloc_count++
15396 * sizeof (Elf64_External_Rela)));
15397 }
15398 else
15399 {
15400 rela.r_offset = (htab->elf.splt->output_section->vma
15401 + htab->elf.splt->output_offset
15402 + ent->plt.offset);
15403 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15404 rela.r_addend = ent->addend;
15405 loc = (htab->elf.srelplt->contents
15406 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15407 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15408 }
15409 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15410
15411 if (!htab->opd_abi)
15412 {
15413 if (!h->def_regular)
15414 {
15415 /* Mark the symbol as undefined, rather than as
15416 defined in glink. Leave the value if there were
15417 any relocations where pointer equality matters
15418 (this is a clue for the dynamic linker, to make
15419 function pointer comparisons work between an
15420 application and shared library), otherwise set it
15421 to zero. */
15422 sym->st_shndx = SHN_UNDEF;
15423 if (!h->pointer_equality_needed)
15424 sym->st_value = 0;
15425 else if (!h->ref_regular_nonweak)
15426 {
15427 /* This breaks function pointer comparisons, but
15428 that is better than breaking tests for a NULL
15429 function pointer. */
15430 sym->st_value = 0;
15431 }
15432 }
15433 }
15434 }
15435
15436 if (h->needs_copy)
15437 {
15438 /* This symbol needs a copy reloc. Set it up. */
15439
15440 if (h->dynindx == -1
15441 || (h->root.type != bfd_link_hash_defined
15442 && h->root.type != bfd_link_hash_defweak)
15443 || htab->relbss == NULL)
15444 abort ();
15445
15446 rela.r_offset = (h->root.u.def.value
15447 + h->root.u.def.section->output_section->vma
15448 + h->root.u.def.section->output_offset);
15449 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15450 rela.r_addend = 0;
15451 loc = htab->relbss->contents;
15452 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15453 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15454 }
15455
15456 return TRUE;
15457 }
15458
15459 /* Used to decide how to sort relocs in an optimal manner for the
15460 dynamic linker, before writing them out. */
15461
15462 static enum elf_reloc_type_class
15463 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15464 const asection *rel_sec,
15465 const Elf_Internal_Rela *rela)
15466 {
15467 enum elf_ppc64_reloc_type r_type;
15468 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15469
15470 if (rel_sec == htab->elf.irelplt)
15471 return reloc_class_ifunc;
15472
15473 r_type = ELF64_R_TYPE (rela->r_info);
15474 switch (r_type)
15475 {
15476 case R_PPC64_RELATIVE:
15477 return reloc_class_relative;
15478 case R_PPC64_JMP_SLOT:
15479 return reloc_class_plt;
15480 case R_PPC64_COPY:
15481 return reloc_class_copy;
15482 default:
15483 return reloc_class_normal;
15484 }
15485 }
15486
15487 /* Finish up the dynamic sections. */
15488
15489 static bfd_boolean
15490 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15491 struct bfd_link_info *info)
15492 {
15493 struct ppc_link_hash_table *htab;
15494 bfd *dynobj;
15495 asection *sdyn;
15496
15497 htab = ppc_hash_table (info);
15498 if (htab == NULL)
15499 return FALSE;
15500
15501 dynobj = htab->elf.dynobj;
15502 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15503
15504 if (htab->elf.dynamic_sections_created)
15505 {
15506 Elf64_External_Dyn *dyncon, *dynconend;
15507
15508 if (sdyn == NULL || htab->elf.sgot == NULL)
15509 abort ();
15510
15511 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15512 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15513 for (; dyncon < dynconend; dyncon++)
15514 {
15515 Elf_Internal_Dyn dyn;
15516 asection *s;
15517
15518 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15519
15520 switch (dyn.d_tag)
15521 {
15522 default:
15523 continue;
15524
15525 case DT_PPC64_GLINK:
15526 s = htab->glink;
15527 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15528 /* We stupidly defined DT_PPC64_GLINK to be the start
15529 of glink rather than the first entry point, which is
15530 what ld.so needs, and now have a bigger stub to
15531 support automatic multiple TOCs. */
15532 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15533 break;
15534
15535 case DT_PPC64_OPD:
15536 s = bfd_get_section_by_name (output_bfd, ".opd");
15537 if (s == NULL)
15538 continue;
15539 dyn.d_un.d_ptr = s->vma;
15540 break;
15541
15542 case DT_PPC64_OPT:
15543 if (htab->do_multi_toc && htab->multi_toc_needed)
15544 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15545 break;
15546
15547 case DT_PPC64_OPDSZ:
15548 s = bfd_get_section_by_name (output_bfd, ".opd");
15549 if (s == NULL)
15550 continue;
15551 dyn.d_un.d_val = s->size;
15552 break;
15553
15554 case DT_PLTGOT:
15555 s = htab->elf.splt;
15556 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15557 break;
15558
15559 case DT_JMPREL:
15560 s = htab->elf.srelplt;
15561 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15562 break;
15563
15564 case DT_PLTRELSZ:
15565 dyn.d_un.d_val = htab->elf.srelplt->size;
15566 break;
15567
15568 case DT_RELASZ:
15569 /* Don't count procedure linkage table relocs in the
15570 overall reloc count. */
15571 s = htab->elf.srelplt;
15572 if (s == NULL)
15573 continue;
15574 dyn.d_un.d_val -= s->size;
15575 break;
15576
15577 case DT_RELA:
15578 /* We may not be using the standard ELF linker script.
15579 If .rela.plt is the first .rela section, we adjust
15580 DT_RELA to not include it. */
15581 s = htab->elf.srelplt;
15582 if (s == NULL)
15583 continue;
15584 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15585 continue;
15586 dyn.d_un.d_ptr += s->size;
15587 break;
15588 }
15589
15590 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15591 }
15592 }
15593
15594 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15595 {
15596 /* Fill in the first entry in the global offset table.
15597 We use it to hold the link-time TOCbase. */
15598 bfd_put_64 (output_bfd,
15599 elf_gp (output_bfd) + TOC_BASE_OFF,
15600 htab->elf.sgot->contents);
15601
15602 /* Set .got entry size. */
15603 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15604 }
15605
15606 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15607 {
15608 /* Set .plt entry size. */
15609 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15610 = PLT_ENTRY_SIZE (htab);
15611 }
15612
15613 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15614 brlt ourselves if emitrelocations. */
15615 if (htab->brlt != NULL
15616 && htab->brlt->reloc_count != 0
15617 && !_bfd_elf_link_output_relocs (output_bfd,
15618 htab->brlt,
15619 elf_section_data (htab->brlt)->rela.hdr,
15620 elf_section_data (htab->brlt)->relocs,
15621 NULL))
15622 return FALSE;
15623
15624 if (htab->glink != NULL
15625 && htab->glink->reloc_count != 0
15626 && !_bfd_elf_link_output_relocs (output_bfd,
15627 htab->glink,
15628 elf_section_data (htab->glink)->rela.hdr,
15629 elf_section_data (htab->glink)->relocs,
15630 NULL))
15631 return FALSE;
15632
15633 if (htab->glink_eh_frame != NULL
15634 && htab->glink_eh_frame->size != 0)
15635 {
15636 bfd_vma val;
15637 bfd_byte *p;
15638 asection *stub_sec;
15639
15640 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15641 for (stub_sec = htab->params->stub_bfd->sections;
15642 stub_sec != NULL;
15643 stub_sec = stub_sec->next)
15644 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15645 {
15646 /* FDE length. */
15647 p += 4;
15648 /* CIE pointer. */
15649 p += 4;
15650 /* Offset to stub section. */
15651 val = (stub_sec->output_section->vma
15652 + stub_sec->output_offset);
15653 val -= (htab->glink_eh_frame->output_section->vma
15654 + htab->glink_eh_frame->output_offset
15655 + (p - htab->glink_eh_frame->contents));
15656 if (val + 0x80000000 > 0xffffffff)
15657 {
15658 info->callbacks->einfo
15659 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15660 stub_sec->name);
15661 return FALSE;
15662 }
15663 bfd_put_32 (dynobj, val, p);
15664 p += 4;
15665 /* stub section size. */
15666 p += 4;
15667 /* Augmentation. */
15668 p += 1;
15669 /* Pad. */
15670 p += 7;
15671 }
15672 if (htab->glink != NULL && htab->glink->size != 0)
15673 {
15674 /* FDE length. */
15675 p += 4;
15676 /* CIE pointer. */
15677 p += 4;
15678 /* Offset to .glink. */
15679 val = (htab->glink->output_section->vma
15680 + htab->glink->output_offset
15681 + 8);
15682 val -= (htab->glink_eh_frame->output_section->vma
15683 + htab->glink_eh_frame->output_offset
15684 + (p - htab->glink_eh_frame->contents));
15685 if (val + 0x80000000 > 0xffffffff)
15686 {
15687 info->callbacks->einfo
15688 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15689 htab->glink->name);
15690 return FALSE;
15691 }
15692 bfd_put_32 (dynobj, val, p);
15693 p += 4;
15694 /* .glink size. */
15695 p += 4;
15696 /* Augmentation. */
15697 p += 1;
15698 /* Ops. */
15699 p += 7;
15700 }
15701
15702 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15703 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15704 htab->glink_eh_frame,
15705 htab->glink_eh_frame->contents))
15706 return FALSE;
15707 }
15708
15709 /* We need to handle writing out multiple GOT sections ourselves,
15710 since we didn't add them to DYNOBJ. We know dynobj is the first
15711 bfd. */
15712 while ((dynobj = dynobj->link.next) != NULL)
15713 {
15714 asection *s;
15715
15716 if (!is_ppc64_elf (dynobj))
15717 continue;
15718
15719 s = ppc64_elf_tdata (dynobj)->got;
15720 if (s != NULL
15721 && s->size != 0
15722 && s->output_section != bfd_abs_section_ptr
15723 && !bfd_set_section_contents (output_bfd, s->output_section,
15724 s->contents, s->output_offset,
15725 s->size))
15726 return FALSE;
15727 s = ppc64_elf_tdata (dynobj)->relgot;
15728 if (s != NULL
15729 && s->size != 0
15730 && s->output_section != bfd_abs_section_ptr
15731 && !bfd_set_section_contents (output_bfd, s->output_section,
15732 s->contents, s->output_offset,
15733 s->size))
15734 return FALSE;
15735 }
15736
15737 return TRUE;
15738 }
15739
15740 #include "elf64-target.h"
15741
15742 /* FreeBSD support */
15743
15744 #undef TARGET_LITTLE_SYM
15745 #undef TARGET_LITTLE_NAME
15746
15747 #undef TARGET_BIG_SYM
15748 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15749 #undef TARGET_BIG_NAME
15750 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15751
15752 #undef ELF_OSABI
15753 #define ELF_OSABI ELFOSABI_FREEBSD
15754
15755 #undef elf64_bed
15756 #define elf64_bed elf64_powerpc_fbsd_bed
15757
15758 #include "elf64-target.h"
15759