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PR 21266, unstable qsort in bfd/elf64-ppc.c
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_want_dynrelro 1
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_gc_keep ppc64_elf_gc_keep
105 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
106 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
107 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124
125 /* The name of the dynamic interpreter. This is put in the .interp
126 section. */
127 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
128
129 /* The size in bytes of an entry in the procedure linkage table. */
130 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
131
132 /* The initial size of the plt reserved for the dynamic linker. */
133 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
134
135 /* Offsets to some stack save slots. */
136 #define STK_LR 16
137 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
138 /* This one is dodgy. ELFv2 does not have a linker word, so use the
139 CR save slot. Used only by optimised __tls_get_addr call stub,
140 relying on __tls_get_addr_opt not saving CR.. */
141 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
142
143 /* TOC base pointers offset from start of TOC. */
144 #define TOC_BASE_OFF 0x8000
145 /* TOC base alignment. */
146 #define TOC_BASE_ALIGN 256
147
148 /* Offset of tp and dtp pointers from start of TLS block. */
149 #define TP_OFFSET 0x7000
150 #define DTP_OFFSET 0x8000
151
152 /* .plt call stub instructions. The normal stub is like this, but
153 sometimes the .plt entry crosses a 64k boundary and we need to
154 insert an addi to adjust r11. */
155 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
156 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
157 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
158 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
159 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
160 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
161 #define BCTR 0x4e800420 /* bctr */
162
163 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
164 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
165 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
166
167 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
168 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
169 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
170 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
171 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
172 #define BNECTR 0x4ca20420 /* bnectr+ */
173 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
174
175 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
176 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
177 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
178
179 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
180 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
181 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
182
183 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
184 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
185 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
186 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
187 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
188
189 /* glink call stub instructions. We enter with the index in R0. */
190 #define GLINK_CALL_STUB_SIZE (16*4)
191 /* 0: */
192 /* .quad plt0-1f */
193 /* __glink: */
194 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
195 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
196 /* 1: */
197 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
198 /* ld %2,(0b-1b)(%11) */
199 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
200 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
201 /* ld %12,0(%11) */
202 /* ld %2,8(%11) */
203 /* mtctr %12 */
204 /* ld %11,16(%11) */
205 /* bctr */
206 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
207 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
208 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
209 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
210 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
211
212 /* Pad with this. */
213 #define NOP 0x60000000
214
215 /* Some other nops. */
216 #define CROR_151515 0x4def7b82
217 #define CROR_313131 0x4ffffb82
218
219 /* .glink entries for the first 32k functions are two instructions. */
220 #define LI_R0_0 0x38000000 /* li %r0,0 */
221 #define B_DOT 0x48000000 /* b . */
222
223 /* After that, we need two instructions to load the index, followed by
224 a branch. */
225 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
226 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
227
228 /* Instructions used by the save and restore reg functions. */
229 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
230 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
231 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
232 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
233 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
234 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
235 #define LI_R12_0 0x39800000 /* li %r12,0 */
236 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
237 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
238 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
239 #define BLR 0x4e800020 /* blr */
240
241 /* Since .opd is an array of descriptors and each entry will end up
242 with identical R_PPC64_RELATIVE relocs, there is really no need to
243 propagate .opd relocs; The dynamic linker should be taught to
244 relocate .opd without reloc entries. */
245 #ifndef NO_OPD_RELOCS
246 #define NO_OPD_RELOCS 0
247 #endif
248
249 #ifndef ARRAY_SIZE
250 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
251 #endif
252
253 static inline int
254 abiversion (bfd *abfd)
255 {
256 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
257 }
258
259 static inline void
260 set_abiversion (bfd *abfd, int ver)
261 {
262 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
263 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
264 }
265 \f
266 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
267
268 /* Relocation HOWTO's. */
269 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
270
271 static reloc_howto_type ppc64_elf_howto_raw[] = {
272 /* This reloc does nothing. */
273 HOWTO (R_PPC64_NONE, /* type */
274 0, /* rightshift */
275 3, /* size (0 = byte, 1 = short, 2 = long) */
276 0, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_dont, /* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_PPC64_NONE", /* name */
282 FALSE, /* partial_inplace */
283 0, /* src_mask */
284 0, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* A standard 32 bit relocation. */
288 HOWTO (R_PPC64_ADDR32, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 32, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC64_ADDR32", /* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xffffffff, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 26 bit branch; the lower two bits must be zero.
303 FIXME: we don't check that, we just clear them. */
304 HOWTO (R_PPC64_ADDR24, /* type */
305 0, /* rightshift */
306 2, /* size (0 = byte, 1 = short, 2 = long) */
307 26, /* bitsize */
308 FALSE, /* pc_relative */
309 0, /* bitpos */
310 complain_overflow_bitfield, /* complain_on_overflow */
311 bfd_elf_generic_reloc, /* special_function */
312 "R_PPC64_ADDR24", /* name */
313 FALSE, /* partial_inplace */
314 0, /* src_mask */
315 0x03fffffc, /* dst_mask */
316 FALSE), /* pcrel_offset */
317
318 /* A standard 16 bit relocation. */
319 HOWTO (R_PPC64_ADDR16, /* type */
320 0, /* rightshift */
321 1, /* size (0 = byte, 1 = short, 2 = long) */
322 16, /* bitsize */
323 FALSE, /* pc_relative */
324 0, /* bitpos */
325 complain_overflow_bitfield, /* complain_on_overflow */
326 bfd_elf_generic_reloc, /* special_function */
327 "R_PPC64_ADDR16", /* name */
328 FALSE, /* partial_inplace */
329 0, /* src_mask */
330 0xffff, /* dst_mask */
331 FALSE), /* pcrel_offset */
332
333 /* A 16 bit relocation without overflow. */
334 HOWTO (R_PPC64_ADDR16_LO, /* type */
335 0, /* rightshift */
336 1, /* size (0 = byte, 1 = short, 2 = long) */
337 16, /* bitsize */
338 FALSE, /* pc_relative */
339 0, /* bitpos */
340 complain_overflow_dont,/* complain_on_overflow */
341 bfd_elf_generic_reloc, /* special_function */
342 "R_PPC64_ADDR16_LO", /* name */
343 FALSE, /* partial_inplace */
344 0, /* src_mask */
345 0xffff, /* dst_mask */
346 FALSE), /* pcrel_offset */
347
348 /* Bits 16-31 of an address. */
349 HOWTO (R_PPC64_ADDR16_HI, /* type */
350 16, /* rightshift */
351 1, /* size (0 = byte, 1 = short, 2 = long) */
352 16, /* bitsize */
353 FALSE, /* pc_relative */
354 0, /* bitpos */
355 complain_overflow_signed, /* complain_on_overflow */
356 bfd_elf_generic_reloc, /* special_function */
357 "R_PPC64_ADDR16_HI", /* name */
358 FALSE, /* partial_inplace */
359 0, /* src_mask */
360 0xffff, /* dst_mask */
361 FALSE), /* pcrel_offset */
362
363 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
364 bits, treated as a signed number, is negative. */
365 HOWTO (R_PPC64_ADDR16_HA, /* type */
366 16, /* rightshift */
367 1, /* size (0 = byte, 1 = short, 2 = long) */
368 16, /* bitsize */
369 FALSE, /* pc_relative */
370 0, /* bitpos */
371 complain_overflow_signed, /* complain_on_overflow */
372 ppc64_elf_ha_reloc, /* special_function */
373 "R_PPC64_ADDR16_HA", /* name */
374 FALSE, /* partial_inplace */
375 0, /* src_mask */
376 0xffff, /* dst_mask */
377 FALSE), /* pcrel_offset */
378
379 /* An absolute 16 bit branch; the lower two bits must be zero.
380 FIXME: we don't check that, we just clear them. */
381 HOWTO (R_PPC64_ADDR14, /* type */
382 0, /* rightshift */
383 2, /* size (0 = byte, 1 = short, 2 = long) */
384 16, /* bitsize */
385 FALSE, /* pc_relative */
386 0, /* bitpos */
387 complain_overflow_signed, /* complain_on_overflow */
388 ppc64_elf_branch_reloc, /* special_function */
389 "R_PPC64_ADDR14", /* name */
390 FALSE, /* partial_inplace */
391 0, /* src_mask */
392 0x0000fffc, /* dst_mask */
393 FALSE), /* pcrel_offset */
394
395 /* An absolute 16 bit branch, for which bit 10 should be set to
396 indicate that the branch is expected to be taken. The lower two
397 bits must be zero. */
398 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
399 0, /* rightshift */
400 2, /* size (0 = byte, 1 = short, 2 = long) */
401 16, /* bitsize */
402 FALSE, /* pc_relative */
403 0, /* bitpos */
404 complain_overflow_signed, /* complain_on_overflow */
405 ppc64_elf_brtaken_reloc, /* special_function */
406 "R_PPC64_ADDR14_BRTAKEN",/* name */
407 FALSE, /* partial_inplace */
408 0, /* src_mask */
409 0x0000fffc, /* dst_mask */
410 FALSE), /* pcrel_offset */
411
412 /* An absolute 16 bit branch, for which bit 10 should be set to
413 indicate that the branch is not expected to be taken. The lower
414 two bits must be zero. */
415 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
416 0, /* rightshift */
417 2, /* size (0 = byte, 1 = short, 2 = long) */
418 16, /* bitsize */
419 FALSE, /* pc_relative */
420 0, /* bitpos */
421 complain_overflow_signed, /* complain_on_overflow */
422 ppc64_elf_brtaken_reloc, /* special_function */
423 "R_PPC64_ADDR14_BRNTAKEN",/* name */
424 FALSE, /* partial_inplace */
425 0, /* src_mask */
426 0x0000fffc, /* dst_mask */
427 FALSE), /* pcrel_offset */
428
429 /* A relative 26 bit branch; the lower two bits must be zero. */
430 HOWTO (R_PPC64_REL24, /* type */
431 0, /* rightshift */
432 2, /* size (0 = byte, 1 = short, 2 = long) */
433 26, /* bitsize */
434 TRUE, /* pc_relative */
435 0, /* bitpos */
436 complain_overflow_signed, /* complain_on_overflow */
437 ppc64_elf_branch_reloc, /* special_function */
438 "R_PPC64_REL24", /* name */
439 FALSE, /* partial_inplace */
440 0, /* src_mask */
441 0x03fffffc, /* dst_mask */
442 TRUE), /* pcrel_offset */
443
444 /* A relative 16 bit branch; the lower two bits must be zero. */
445 HOWTO (R_PPC64_REL14, /* type */
446 0, /* rightshift */
447 2, /* size (0 = byte, 1 = short, 2 = long) */
448 16, /* bitsize */
449 TRUE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_signed, /* complain_on_overflow */
452 ppc64_elf_branch_reloc, /* special_function */
453 "R_PPC64_REL14", /* name */
454 FALSE, /* partial_inplace */
455 0, /* src_mask */
456 0x0000fffc, /* dst_mask */
457 TRUE), /* pcrel_offset */
458
459 /* A relative 16 bit branch. Bit 10 should be set to indicate that
460 the branch is expected to be taken. The lower two bits must be
461 zero. */
462 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
463 0, /* rightshift */
464 2, /* size (0 = byte, 1 = short, 2 = long) */
465 16, /* bitsize */
466 TRUE, /* pc_relative */
467 0, /* bitpos */
468 complain_overflow_signed, /* complain_on_overflow */
469 ppc64_elf_brtaken_reloc, /* special_function */
470 "R_PPC64_REL14_BRTAKEN", /* name */
471 FALSE, /* partial_inplace */
472 0, /* src_mask */
473 0x0000fffc, /* dst_mask */
474 TRUE), /* pcrel_offset */
475
476 /* A relative 16 bit branch. Bit 10 should be set to indicate that
477 the branch is not expected to be taken. The lower two bits must
478 be zero. */
479 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
480 0, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 16, /* bitsize */
483 TRUE, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_signed, /* complain_on_overflow */
486 ppc64_elf_brtaken_reloc, /* special_function */
487 "R_PPC64_REL14_BRNTAKEN",/* name */
488 FALSE, /* partial_inplace */
489 0, /* src_mask */
490 0x0000fffc, /* dst_mask */
491 TRUE), /* pcrel_offset */
492
493 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
494 symbol. */
495 HOWTO (R_PPC64_GOT16, /* type */
496 0, /* rightshift */
497 1, /* size (0 = byte, 1 = short, 2 = long) */
498 16, /* bitsize */
499 FALSE, /* pc_relative */
500 0, /* bitpos */
501 complain_overflow_signed, /* complain_on_overflow */
502 ppc64_elf_unhandled_reloc, /* special_function */
503 "R_PPC64_GOT16", /* name */
504 FALSE, /* partial_inplace */
505 0, /* src_mask */
506 0xffff, /* dst_mask */
507 FALSE), /* pcrel_offset */
508
509 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
510 the symbol. */
511 HOWTO (R_PPC64_GOT16_LO, /* type */
512 0, /* rightshift */
513 1, /* size (0 = byte, 1 = short, 2 = long) */
514 16, /* bitsize */
515 FALSE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_dont, /* complain_on_overflow */
518 ppc64_elf_unhandled_reloc, /* special_function */
519 "R_PPC64_GOT16_LO", /* name */
520 FALSE, /* partial_inplace */
521 0, /* src_mask */
522 0xffff, /* dst_mask */
523 FALSE), /* pcrel_offset */
524
525 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
526 the symbol. */
527 HOWTO (R_PPC64_GOT16_HI, /* type */
528 16, /* rightshift */
529 1, /* size (0 = byte, 1 = short, 2 = long) */
530 16, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_signed,/* complain_on_overflow */
534 ppc64_elf_unhandled_reloc, /* special_function */
535 "R_PPC64_GOT16_HI", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 0xffff, /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
542 the symbol. */
543 HOWTO (R_PPC64_GOT16_HA, /* type */
544 16, /* rightshift */
545 1, /* size (0 = byte, 1 = short, 2 = long) */
546 16, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_signed,/* complain_on_overflow */
550 ppc64_elf_unhandled_reloc, /* special_function */
551 "R_PPC64_GOT16_HA", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 0xffff, /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* This is used only by the dynamic linker. The symbol should exist
558 both in the object being run and in some shared library. The
559 dynamic linker copies the data addressed by the symbol from the
560 shared library into the object, because the object being
561 run has to have the data at some particular address. */
562 HOWTO (R_PPC64_COPY, /* type */
563 0, /* rightshift */
564 0, /* this one is variable size */
565 0, /* bitsize */
566 FALSE, /* pc_relative */
567 0, /* bitpos */
568 complain_overflow_dont, /* complain_on_overflow */
569 ppc64_elf_unhandled_reloc, /* special_function */
570 "R_PPC64_COPY", /* name */
571 FALSE, /* partial_inplace */
572 0, /* src_mask */
573 0, /* dst_mask */
574 FALSE), /* pcrel_offset */
575
576 /* Like R_PPC64_ADDR64, but used when setting global offset table
577 entries. */
578 HOWTO (R_PPC64_GLOB_DAT, /* type */
579 0, /* rightshift */
580 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
581 64, /* bitsize */
582 FALSE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_dont, /* complain_on_overflow */
585 ppc64_elf_unhandled_reloc, /* special_function */
586 "R_PPC64_GLOB_DAT", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 ONES (64), /* dst_mask */
590 FALSE), /* pcrel_offset */
591
592 /* Created by the link editor. Marks a procedure linkage table
593 entry for a symbol. */
594 HOWTO (R_PPC64_JMP_SLOT, /* type */
595 0, /* rightshift */
596 0, /* size (0 = byte, 1 = short, 2 = long) */
597 0, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_dont, /* complain_on_overflow */
601 ppc64_elf_unhandled_reloc, /* special_function */
602 "R_PPC64_JMP_SLOT", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* Used only by the dynamic linker. When the object is run, this
609 doubleword64 is set to the load address of the object, plus the
610 addend. */
611 HOWTO (R_PPC64_RELATIVE, /* type */
612 0, /* rightshift */
613 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
614 64, /* bitsize */
615 FALSE, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_dont, /* complain_on_overflow */
618 bfd_elf_generic_reloc, /* special_function */
619 "R_PPC64_RELATIVE", /* name */
620 FALSE, /* partial_inplace */
621 0, /* src_mask */
622 ONES (64), /* dst_mask */
623 FALSE), /* pcrel_offset */
624
625 /* Like R_PPC64_ADDR32, but may be unaligned. */
626 HOWTO (R_PPC64_UADDR32, /* type */
627 0, /* rightshift */
628 2, /* size (0 = byte, 1 = short, 2 = long) */
629 32, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_bitfield, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC64_UADDR32", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffffffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC64_ADDR16, but may be unaligned. */
641 HOWTO (R_PPC64_UADDR16, /* type */
642 0, /* rightshift */
643 1, /* size (0 = byte, 1 = short, 2 = long) */
644 16, /* bitsize */
645 FALSE, /* pc_relative */
646 0, /* bitpos */
647 complain_overflow_bitfield, /* complain_on_overflow */
648 bfd_elf_generic_reloc, /* special_function */
649 "R_PPC64_UADDR16", /* name */
650 FALSE, /* partial_inplace */
651 0, /* src_mask */
652 0xffff, /* dst_mask */
653 FALSE), /* pcrel_offset */
654
655 /* 32-bit PC relative. */
656 HOWTO (R_PPC64_REL32, /* type */
657 0, /* rightshift */
658 2, /* size (0 = byte, 1 = short, 2 = long) */
659 32, /* bitsize */
660 TRUE, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_signed, /* complain_on_overflow */
663 bfd_elf_generic_reloc, /* special_function */
664 "R_PPC64_REL32", /* name */
665 FALSE, /* partial_inplace */
666 0, /* src_mask */
667 0xffffffff, /* dst_mask */
668 TRUE), /* pcrel_offset */
669
670 /* 32-bit relocation to the symbol's procedure linkage table. */
671 HOWTO (R_PPC64_PLT32, /* type */
672 0, /* rightshift */
673 2, /* size (0 = byte, 1 = short, 2 = long) */
674 32, /* bitsize */
675 FALSE, /* pc_relative */
676 0, /* bitpos */
677 complain_overflow_bitfield, /* complain_on_overflow */
678 ppc64_elf_unhandled_reloc, /* special_function */
679 "R_PPC64_PLT32", /* name */
680 FALSE, /* partial_inplace */
681 0, /* src_mask */
682 0xffffffff, /* dst_mask */
683 FALSE), /* pcrel_offset */
684
685 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
686 FIXME: R_PPC64_PLTREL32 not supported. */
687 HOWTO (R_PPC64_PLTREL32, /* type */
688 0, /* rightshift */
689 2, /* size (0 = byte, 1 = short, 2 = long) */
690 32, /* bitsize */
691 TRUE, /* pc_relative */
692 0, /* bitpos */
693 complain_overflow_signed, /* complain_on_overflow */
694 ppc64_elf_unhandled_reloc, /* special_function */
695 "R_PPC64_PLTREL32", /* name */
696 FALSE, /* partial_inplace */
697 0, /* src_mask */
698 0xffffffff, /* dst_mask */
699 TRUE), /* pcrel_offset */
700
701 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
702 the symbol. */
703 HOWTO (R_PPC64_PLT16_LO, /* type */
704 0, /* rightshift */
705 1, /* size (0 = byte, 1 = short, 2 = long) */
706 16, /* bitsize */
707 FALSE, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_dont, /* complain_on_overflow */
710 ppc64_elf_unhandled_reloc, /* special_function */
711 "R_PPC64_PLT16_LO", /* name */
712 FALSE, /* partial_inplace */
713 0, /* src_mask */
714 0xffff, /* dst_mask */
715 FALSE), /* pcrel_offset */
716
717 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
718 the symbol. */
719 HOWTO (R_PPC64_PLT16_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_signed, /* complain_on_overflow */
726 ppc64_elf_unhandled_reloc, /* special_function */
727 "R_PPC64_PLT16_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
734 the symbol. */
735 HOWTO (R_PPC64_PLT16_HA, /* type */
736 16, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 FALSE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_signed, /* complain_on_overflow */
742 ppc64_elf_unhandled_reloc, /* special_function */
743 "R_PPC64_PLT16_HA", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 FALSE), /* pcrel_offset */
748
749 /* 16-bit section relative relocation. */
750 HOWTO (R_PPC64_SECTOFF, /* type */
751 0, /* rightshift */
752 1, /* size (0 = byte, 1 = short, 2 = long) */
753 16, /* bitsize */
754 FALSE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_signed, /* complain_on_overflow */
757 ppc64_elf_sectoff_reloc, /* special_function */
758 "R_PPC64_SECTOFF", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 0xffff, /* dst_mask */
762 FALSE), /* pcrel_offset */
763
764 /* Like R_PPC64_SECTOFF, but no overflow warning. */
765 HOWTO (R_PPC64_SECTOFF_LO, /* type */
766 0, /* rightshift */
767 1, /* size (0 = byte, 1 = short, 2 = long) */
768 16, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 ppc64_elf_sectoff_reloc, /* special_function */
773 "R_PPC64_SECTOFF_LO", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* 16-bit upper half section relative relocation. */
780 HOWTO (R_PPC64_SECTOFF_HI, /* type */
781 16, /* rightshift */
782 1, /* size (0 = byte, 1 = short, 2 = long) */
783 16, /* bitsize */
784 FALSE, /* pc_relative */
785 0, /* bitpos */
786 complain_overflow_signed, /* complain_on_overflow */
787 ppc64_elf_sectoff_reloc, /* special_function */
788 "R_PPC64_SECTOFF_HI", /* name */
789 FALSE, /* partial_inplace */
790 0, /* src_mask */
791 0xffff, /* dst_mask */
792 FALSE), /* pcrel_offset */
793
794 /* 16-bit upper half adjusted section relative relocation. */
795 HOWTO (R_PPC64_SECTOFF_HA, /* type */
796 16, /* rightshift */
797 1, /* size (0 = byte, 1 = short, 2 = long) */
798 16, /* bitsize */
799 FALSE, /* pc_relative */
800 0, /* bitpos */
801 complain_overflow_signed, /* complain_on_overflow */
802 ppc64_elf_sectoff_ha_reloc, /* special_function */
803 "R_PPC64_SECTOFF_HA", /* name */
804 FALSE, /* partial_inplace */
805 0, /* src_mask */
806 0xffff, /* dst_mask */
807 FALSE), /* pcrel_offset */
808
809 /* Like R_PPC64_REL24 without touching the two least significant bits. */
810 HOWTO (R_PPC64_REL30, /* type */
811 2, /* rightshift */
812 2, /* size (0 = byte, 1 = short, 2 = long) */
813 30, /* bitsize */
814 TRUE, /* pc_relative */
815 0, /* bitpos */
816 complain_overflow_dont, /* complain_on_overflow */
817 bfd_elf_generic_reloc, /* special_function */
818 "R_PPC64_REL30", /* name */
819 FALSE, /* partial_inplace */
820 0, /* src_mask */
821 0xfffffffc, /* dst_mask */
822 TRUE), /* pcrel_offset */
823
824 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
825
826 /* A standard 64-bit relocation. */
827 HOWTO (R_PPC64_ADDR64, /* type */
828 0, /* rightshift */
829 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
830 64, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 bfd_elf_generic_reloc, /* special_function */
835 "R_PPC64_ADDR64", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 ONES (64), /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* The bits 32-47 of an address. */
842 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
843 32, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 bfd_elf_generic_reloc, /* special_function */
850 "R_PPC64_ADDR16_HIGHER", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* The bits 32-47 of an address, plus 1 if the contents of the low
857 16 bits, treated as a signed number, is negative. */
858 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
859 32, /* rightshift */
860 1, /* size (0 = byte, 1 = short, 2 = long) */
861 16, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc64_elf_ha_reloc, /* special_function */
866 "R_PPC64_ADDR16_HIGHERA", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* The bits 48-63 of an address. */
873 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
874 48, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_dont, /* complain_on_overflow */
880 bfd_elf_generic_reloc, /* special_function */
881 "R_PPC64_ADDR16_HIGHEST", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* The bits 48-63 of an address, plus 1 if the contents of the low
888 16 bits, treated as a signed number, is negative. */
889 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
890 48, /* rightshift */
891 1, /* size (0 = byte, 1 = short, 2 = long) */
892 16, /* bitsize */
893 FALSE, /* pc_relative */
894 0, /* bitpos */
895 complain_overflow_dont, /* complain_on_overflow */
896 ppc64_elf_ha_reloc, /* special_function */
897 "R_PPC64_ADDR16_HIGHESTA", /* name */
898 FALSE, /* partial_inplace */
899 0, /* src_mask */
900 0xffff, /* dst_mask */
901 FALSE), /* pcrel_offset */
902
903 /* Like ADDR64, but may be unaligned. */
904 HOWTO (R_PPC64_UADDR64, /* type */
905 0, /* rightshift */
906 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
907 64, /* bitsize */
908 FALSE, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_dont, /* complain_on_overflow */
911 bfd_elf_generic_reloc, /* special_function */
912 "R_PPC64_UADDR64", /* name */
913 FALSE, /* partial_inplace */
914 0, /* src_mask */
915 ONES (64), /* dst_mask */
916 FALSE), /* pcrel_offset */
917
918 /* 64-bit relative relocation. */
919 HOWTO (R_PPC64_REL64, /* type */
920 0, /* rightshift */
921 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
922 64, /* bitsize */
923 TRUE, /* pc_relative */
924 0, /* bitpos */
925 complain_overflow_dont, /* complain_on_overflow */
926 bfd_elf_generic_reloc, /* special_function */
927 "R_PPC64_REL64", /* name */
928 FALSE, /* partial_inplace */
929 0, /* src_mask */
930 ONES (64), /* dst_mask */
931 TRUE), /* pcrel_offset */
932
933 /* 64-bit relocation to the symbol's procedure linkage table. */
934 HOWTO (R_PPC64_PLT64, /* type */
935 0, /* rightshift */
936 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
937 64, /* bitsize */
938 FALSE, /* pc_relative */
939 0, /* bitpos */
940 complain_overflow_dont, /* complain_on_overflow */
941 ppc64_elf_unhandled_reloc, /* special_function */
942 "R_PPC64_PLT64", /* name */
943 FALSE, /* partial_inplace */
944 0, /* src_mask */
945 ONES (64), /* dst_mask */
946 FALSE), /* pcrel_offset */
947
948 /* 64-bit PC relative relocation to the symbol's procedure linkage
949 table. */
950 /* FIXME: R_PPC64_PLTREL64 not supported. */
951 HOWTO (R_PPC64_PLTREL64, /* type */
952 0, /* rightshift */
953 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
954 64, /* bitsize */
955 TRUE, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_dont, /* complain_on_overflow */
958 ppc64_elf_unhandled_reloc, /* special_function */
959 "R_PPC64_PLTREL64", /* name */
960 FALSE, /* partial_inplace */
961 0, /* src_mask */
962 ONES (64), /* dst_mask */
963 TRUE), /* pcrel_offset */
964
965 /* 16 bit TOC-relative relocation. */
966
967 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
968 HOWTO (R_PPC64_TOC16, /* type */
969 0, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_signed, /* complain_on_overflow */
975 ppc64_elf_toc_reloc, /* special_function */
976 "R_PPC64_TOC16", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 16 bit TOC-relative relocation without overflow. */
983
984 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
985 HOWTO (R_PPC64_TOC16_LO, /* type */
986 0, /* rightshift */
987 1, /* size (0 = byte, 1 = short, 2 = long) */
988 16, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_dont, /* complain_on_overflow */
992 ppc64_elf_toc_reloc, /* special_function */
993 "R_PPC64_TOC16_LO", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 0xffff, /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* 16 bit TOC-relative relocation, high 16 bits. */
1000
1001 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1002 HOWTO (R_PPC64_TOC16_HI, /* type */
1003 16, /* rightshift */
1004 1, /* size (0 = byte, 1 = short, 2 = long) */
1005 16, /* bitsize */
1006 FALSE, /* pc_relative */
1007 0, /* bitpos */
1008 complain_overflow_signed, /* complain_on_overflow */
1009 ppc64_elf_toc_reloc, /* special_function */
1010 "R_PPC64_TOC16_HI", /* name */
1011 FALSE, /* partial_inplace */
1012 0, /* src_mask */
1013 0xffff, /* dst_mask */
1014 FALSE), /* pcrel_offset */
1015
1016 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1017 contents of the low 16 bits, treated as a signed number, is
1018 negative. */
1019
1020 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1021 HOWTO (R_PPC64_TOC16_HA, /* type */
1022 16, /* rightshift */
1023 1, /* size (0 = byte, 1 = short, 2 = long) */
1024 16, /* bitsize */
1025 FALSE, /* pc_relative */
1026 0, /* bitpos */
1027 complain_overflow_signed, /* complain_on_overflow */
1028 ppc64_elf_toc_ha_reloc, /* special_function */
1029 "R_PPC64_TOC16_HA", /* name */
1030 FALSE, /* partial_inplace */
1031 0, /* src_mask */
1032 0xffff, /* dst_mask */
1033 FALSE), /* pcrel_offset */
1034
1035 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1036
1037 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1038 HOWTO (R_PPC64_TOC, /* type */
1039 0, /* rightshift */
1040 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1041 64, /* bitsize */
1042 FALSE, /* pc_relative */
1043 0, /* bitpos */
1044 complain_overflow_dont, /* complain_on_overflow */
1045 ppc64_elf_toc64_reloc, /* special_function */
1046 "R_PPC64_TOC", /* name */
1047 FALSE, /* partial_inplace */
1048 0, /* src_mask */
1049 ONES (64), /* dst_mask */
1050 FALSE), /* pcrel_offset */
1051
1052 /* Like R_PPC64_GOT16, but also informs the link editor that the
1053 value to relocate may (!) refer to a PLT entry which the link
1054 editor (a) may replace with the symbol value. If the link editor
1055 is unable to fully resolve the symbol, it may (b) create a PLT
1056 entry and store the address to the new PLT entry in the GOT.
1057 This permits lazy resolution of function symbols at run time.
1058 The link editor may also skip all of this and just (c) emit a
1059 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1060 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1061 HOWTO (R_PPC64_PLTGOT16, /* type */
1062 0, /* rightshift */
1063 1, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_signed, /* complain_on_overflow */
1068 ppc64_elf_unhandled_reloc, /* special_function */
1069 "R_PPC64_PLTGOT16", /* name */
1070 FALSE, /* partial_inplace */
1071 0, /* src_mask */
1072 0xffff, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* Like R_PPC64_PLTGOT16, but without overflow. */
1076 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1077 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1078 0, /* rightshift */
1079 1, /* size (0 = byte, 1 = short, 2 = long) */
1080 16, /* bitsize */
1081 FALSE, /* pc_relative */
1082 0, /* bitpos */
1083 complain_overflow_dont, /* complain_on_overflow */
1084 ppc64_elf_unhandled_reloc, /* special_function */
1085 "R_PPC64_PLTGOT16_LO", /* name */
1086 FALSE, /* partial_inplace */
1087 0, /* src_mask */
1088 0xffff, /* dst_mask */
1089 FALSE), /* pcrel_offset */
1090
1091 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1092 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1093 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1094 16, /* rightshift */
1095 1, /* size (0 = byte, 1 = short, 2 = long) */
1096 16, /* bitsize */
1097 FALSE, /* pc_relative */
1098 0, /* bitpos */
1099 complain_overflow_signed, /* complain_on_overflow */
1100 ppc64_elf_unhandled_reloc, /* special_function */
1101 "R_PPC64_PLTGOT16_HI", /* name */
1102 FALSE, /* partial_inplace */
1103 0, /* src_mask */
1104 0xffff, /* dst_mask */
1105 FALSE), /* pcrel_offset */
1106
1107 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1108 1 if the contents of the low 16 bits, treated as a signed number,
1109 is negative. */
1110 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1111 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1112 16, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc64_elf_unhandled_reloc, /* special_function */
1119 "R_PPC64_PLTGOT16_HA", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1126 HOWTO (R_PPC64_ADDR16_DS, /* type */
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_signed, /* complain_on_overflow */
1133 bfd_elf_generic_reloc, /* special_function */
1134 "R_PPC64_ADDR16_DS", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xfffc, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1141 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1142 0, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont,/* complain_on_overflow */
1148 bfd_elf_generic_reloc, /* special_function */
1149 "R_PPC64_ADDR16_LO_DS",/* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xfffc, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1156 HOWTO (R_PPC64_GOT16_DS, /* type */
1157 0, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_signed, /* complain_on_overflow */
1163 ppc64_elf_unhandled_reloc, /* special_function */
1164 "R_PPC64_GOT16_DS", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xfffc, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1171 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1172 0, /* rightshift */
1173 1, /* size (0 = byte, 1 = short, 2 = long) */
1174 16, /* bitsize */
1175 FALSE, /* pc_relative */
1176 0, /* bitpos */
1177 complain_overflow_dont, /* complain_on_overflow */
1178 ppc64_elf_unhandled_reloc, /* special_function */
1179 "R_PPC64_GOT16_LO_DS", /* name */
1180 FALSE, /* partial_inplace */
1181 0, /* src_mask */
1182 0xfffc, /* dst_mask */
1183 FALSE), /* pcrel_offset */
1184
1185 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1186 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1187 0, /* rightshift */
1188 1, /* size (0 = byte, 1 = short, 2 = long) */
1189 16, /* bitsize */
1190 FALSE, /* pc_relative */
1191 0, /* bitpos */
1192 complain_overflow_dont, /* complain_on_overflow */
1193 ppc64_elf_unhandled_reloc, /* special_function */
1194 "R_PPC64_PLT16_LO_DS", /* name */
1195 FALSE, /* partial_inplace */
1196 0, /* src_mask */
1197 0xfffc, /* dst_mask */
1198 FALSE), /* pcrel_offset */
1199
1200 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1201 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1202 0, /* rightshift */
1203 1, /* size (0 = byte, 1 = short, 2 = long) */
1204 16, /* bitsize */
1205 FALSE, /* pc_relative */
1206 0, /* bitpos */
1207 complain_overflow_signed, /* complain_on_overflow */
1208 ppc64_elf_sectoff_reloc, /* special_function */
1209 "R_PPC64_SECTOFF_DS", /* name */
1210 FALSE, /* partial_inplace */
1211 0, /* src_mask */
1212 0xfffc, /* dst_mask */
1213 FALSE), /* pcrel_offset */
1214
1215 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1216 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1217 0, /* rightshift */
1218 1, /* size (0 = byte, 1 = short, 2 = long) */
1219 16, /* bitsize */
1220 FALSE, /* pc_relative */
1221 0, /* bitpos */
1222 complain_overflow_dont, /* complain_on_overflow */
1223 ppc64_elf_sectoff_reloc, /* special_function */
1224 "R_PPC64_SECTOFF_LO_DS",/* name */
1225 FALSE, /* partial_inplace */
1226 0, /* src_mask */
1227 0xfffc, /* dst_mask */
1228 FALSE), /* pcrel_offset */
1229
1230 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1231 HOWTO (R_PPC64_TOC16_DS, /* type */
1232 0, /* rightshift */
1233 1, /* size (0 = byte, 1 = short, 2 = long) */
1234 16, /* bitsize */
1235 FALSE, /* pc_relative */
1236 0, /* bitpos */
1237 complain_overflow_signed, /* complain_on_overflow */
1238 ppc64_elf_toc_reloc, /* special_function */
1239 "R_PPC64_TOC16_DS", /* name */
1240 FALSE, /* partial_inplace */
1241 0, /* src_mask */
1242 0xfffc, /* dst_mask */
1243 FALSE), /* pcrel_offset */
1244
1245 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1246 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1247 0, /* rightshift */
1248 1, /* size (0 = byte, 1 = short, 2 = long) */
1249 16, /* bitsize */
1250 FALSE, /* pc_relative */
1251 0, /* bitpos */
1252 complain_overflow_dont, /* complain_on_overflow */
1253 ppc64_elf_toc_reloc, /* special_function */
1254 "R_PPC64_TOC16_LO_DS", /* name */
1255 FALSE, /* partial_inplace */
1256 0, /* src_mask */
1257 0xfffc, /* dst_mask */
1258 FALSE), /* pcrel_offset */
1259
1260 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1261 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1262 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1263 0, /* rightshift */
1264 1, /* size (0 = byte, 1 = short, 2 = long) */
1265 16, /* bitsize */
1266 FALSE, /* pc_relative */
1267 0, /* bitpos */
1268 complain_overflow_signed, /* complain_on_overflow */
1269 ppc64_elf_unhandled_reloc, /* special_function */
1270 "R_PPC64_PLTGOT16_DS", /* name */
1271 FALSE, /* partial_inplace */
1272 0, /* src_mask */
1273 0xfffc, /* dst_mask */
1274 FALSE), /* pcrel_offset */
1275
1276 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1277 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1278 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_dont, /* complain_on_overflow */
1285 ppc64_elf_unhandled_reloc, /* special_function */
1286 "R_PPC64_PLTGOT16_LO_DS",/* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xfffc, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* Marker relocs for TLS. */
1293 HOWTO (R_PPC64_TLS,
1294 0, /* rightshift */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 32, /* bitsize */
1297 FALSE, /* pc_relative */
1298 0, /* bitpos */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TLS", /* name */
1302 FALSE, /* partial_inplace */
1303 0, /* src_mask */
1304 0, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1306
1307 HOWTO (R_PPC64_TLSGD,
1308 0, /* rightshift */
1309 2, /* size (0 = byte, 1 = short, 2 = long) */
1310 32, /* bitsize */
1311 FALSE, /* pc_relative */
1312 0, /* bitpos */
1313 complain_overflow_dont, /* complain_on_overflow */
1314 bfd_elf_generic_reloc, /* special_function */
1315 "R_PPC64_TLSGD", /* name */
1316 FALSE, /* partial_inplace */
1317 0, /* src_mask */
1318 0, /* dst_mask */
1319 FALSE), /* pcrel_offset */
1320
1321 HOWTO (R_PPC64_TLSLD,
1322 0, /* rightshift */
1323 2, /* size (0 = byte, 1 = short, 2 = long) */
1324 32, /* bitsize */
1325 FALSE, /* pc_relative */
1326 0, /* bitpos */
1327 complain_overflow_dont, /* complain_on_overflow */
1328 bfd_elf_generic_reloc, /* special_function */
1329 "R_PPC64_TLSLD", /* name */
1330 FALSE, /* partial_inplace */
1331 0, /* src_mask */
1332 0, /* dst_mask */
1333 FALSE), /* pcrel_offset */
1334
1335 HOWTO (R_PPC64_TOCSAVE,
1336 0, /* rightshift */
1337 2, /* size (0 = byte, 1 = short, 2 = long) */
1338 32, /* bitsize */
1339 FALSE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_dont, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC64_TOCSAVE", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* Computes the load module index of the load module that contains the
1350 definition of its TLS sym. */
1351 HOWTO (R_PPC64_DTPMOD64,
1352 0, /* rightshift */
1353 4, /* size (0 = byte, 1 = short, 2 = long) */
1354 64, /* bitsize */
1355 FALSE, /* pc_relative */
1356 0, /* bitpos */
1357 complain_overflow_dont, /* complain_on_overflow */
1358 ppc64_elf_unhandled_reloc, /* special_function */
1359 "R_PPC64_DTPMOD64", /* name */
1360 FALSE, /* partial_inplace */
1361 0, /* src_mask */
1362 ONES (64), /* dst_mask */
1363 FALSE), /* pcrel_offset */
1364
1365 /* Computes a dtv-relative displacement, the difference between the value
1366 of sym+add and the base address of the thread-local storage block that
1367 contains the definition of sym, minus 0x8000. */
1368 HOWTO (R_PPC64_DTPREL64,
1369 0, /* rightshift */
1370 4, /* size (0 = byte, 1 = short, 2 = long) */
1371 64, /* bitsize */
1372 FALSE, /* pc_relative */
1373 0, /* bitpos */
1374 complain_overflow_dont, /* complain_on_overflow */
1375 ppc64_elf_unhandled_reloc, /* special_function */
1376 "R_PPC64_DTPREL64", /* name */
1377 FALSE, /* partial_inplace */
1378 0, /* src_mask */
1379 ONES (64), /* dst_mask */
1380 FALSE), /* pcrel_offset */
1381
1382 /* A 16 bit dtprel reloc. */
1383 HOWTO (R_PPC64_DTPREL16,
1384 0, /* rightshift */
1385 1, /* size (0 = byte, 1 = short, 2 = long) */
1386 16, /* bitsize */
1387 FALSE, /* pc_relative */
1388 0, /* bitpos */
1389 complain_overflow_signed, /* complain_on_overflow */
1390 ppc64_elf_unhandled_reloc, /* special_function */
1391 "R_PPC64_DTPREL16", /* name */
1392 FALSE, /* partial_inplace */
1393 0, /* src_mask */
1394 0xffff, /* dst_mask */
1395 FALSE), /* pcrel_offset */
1396
1397 /* Like DTPREL16, but no overflow. */
1398 HOWTO (R_PPC64_DTPREL16_LO,
1399 0, /* rightshift */
1400 1, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 FALSE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_dont, /* complain_on_overflow */
1405 ppc64_elf_unhandled_reloc, /* special_function */
1406 "R_PPC64_DTPREL16_LO", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 FALSE), /* pcrel_offset */
1411
1412 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1413 HOWTO (R_PPC64_DTPREL16_HI,
1414 16, /* rightshift */
1415 1, /* size (0 = byte, 1 = short, 2 = long) */
1416 16, /* bitsize */
1417 FALSE, /* pc_relative */
1418 0, /* bitpos */
1419 complain_overflow_signed, /* complain_on_overflow */
1420 ppc64_elf_unhandled_reloc, /* special_function */
1421 "R_PPC64_DTPREL16_HI", /* name */
1422 FALSE, /* partial_inplace */
1423 0, /* src_mask */
1424 0xffff, /* dst_mask */
1425 FALSE), /* pcrel_offset */
1426
1427 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1428 HOWTO (R_PPC64_DTPREL16_HA,
1429 16, /* rightshift */
1430 1, /* size (0 = byte, 1 = short, 2 = long) */
1431 16, /* bitsize */
1432 FALSE, /* pc_relative */
1433 0, /* bitpos */
1434 complain_overflow_signed, /* complain_on_overflow */
1435 ppc64_elf_unhandled_reloc, /* special_function */
1436 "R_PPC64_DTPREL16_HA", /* name */
1437 FALSE, /* partial_inplace */
1438 0, /* src_mask */
1439 0xffff, /* dst_mask */
1440 FALSE), /* pcrel_offset */
1441
1442 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1443 HOWTO (R_PPC64_DTPREL16_HIGHER,
1444 32, /* rightshift */
1445 1, /* size (0 = byte, 1 = short, 2 = long) */
1446 16, /* bitsize */
1447 FALSE, /* pc_relative */
1448 0, /* bitpos */
1449 complain_overflow_dont, /* complain_on_overflow */
1450 ppc64_elf_unhandled_reloc, /* special_function */
1451 "R_PPC64_DTPREL16_HIGHER", /* name */
1452 FALSE, /* partial_inplace */
1453 0, /* src_mask */
1454 0xffff, /* dst_mask */
1455 FALSE), /* pcrel_offset */
1456
1457 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1458 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1459 32, /* rightshift */
1460 1, /* size (0 = byte, 1 = short, 2 = long) */
1461 16, /* bitsize */
1462 FALSE, /* pc_relative */
1463 0, /* bitpos */
1464 complain_overflow_dont, /* complain_on_overflow */
1465 ppc64_elf_unhandled_reloc, /* special_function */
1466 "R_PPC64_DTPREL16_HIGHERA", /* name */
1467 FALSE, /* partial_inplace */
1468 0, /* src_mask */
1469 0xffff, /* dst_mask */
1470 FALSE), /* pcrel_offset */
1471
1472 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1473 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1474 48, /* rightshift */
1475 1, /* size (0 = byte, 1 = short, 2 = long) */
1476 16, /* bitsize */
1477 FALSE, /* pc_relative */
1478 0, /* bitpos */
1479 complain_overflow_dont, /* complain_on_overflow */
1480 ppc64_elf_unhandled_reloc, /* special_function */
1481 "R_PPC64_DTPREL16_HIGHEST", /* name */
1482 FALSE, /* partial_inplace */
1483 0, /* src_mask */
1484 0xffff, /* dst_mask */
1485 FALSE), /* pcrel_offset */
1486
1487 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1488 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1489 48, /* rightshift */
1490 1, /* size (0 = byte, 1 = short, 2 = long) */
1491 16, /* bitsize */
1492 FALSE, /* pc_relative */
1493 0, /* bitpos */
1494 complain_overflow_dont, /* complain_on_overflow */
1495 ppc64_elf_unhandled_reloc, /* special_function */
1496 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1497 FALSE, /* partial_inplace */
1498 0, /* src_mask */
1499 0xffff, /* dst_mask */
1500 FALSE), /* pcrel_offset */
1501
1502 /* Like DTPREL16, but for insns with a DS field. */
1503 HOWTO (R_PPC64_DTPREL16_DS,
1504 0, /* rightshift */
1505 1, /* size (0 = byte, 1 = short, 2 = long) */
1506 16, /* bitsize */
1507 FALSE, /* pc_relative */
1508 0, /* bitpos */
1509 complain_overflow_signed, /* complain_on_overflow */
1510 ppc64_elf_unhandled_reloc, /* special_function */
1511 "R_PPC64_DTPREL16_DS", /* name */
1512 FALSE, /* partial_inplace */
1513 0, /* src_mask */
1514 0xfffc, /* dst_mask */
1515 FALSE), /* pcrel_offset */
1516
1517 /* Like DTPREL16_DS, but no overflow. */
1518 HOWTO (R_PPC64_DTPREL16_LO_DS,
1519 0, /* rightshift */
1520 1, /* size (0 = byte, 1 = short, 2 = long) */
1521 16, /* bitsize */
1522 FALSE, /* pc_relative */
1523 0, /* bitpos */
1524 complain_overflow_dont, /* complain_on_overflow */
1525 ppc64_elf_unhandled_reloc, /* special_function */
1526 "R_PPC64_DTPREL16_LO_DS", /* name */
1527 FALSE, /* partial_inplace */
1528 0, /* src_mask */
1529 0xfffc, /* dst_mask */
1530 FALSE), /* pcrel_offset */
1531
1532 /* Computes a tp-relative displacement, the difference between the value of
1533 sym+add and the value of the thread pointer (r13). */
1534 HOWTO (R_PPC64_TPREL64,
1535 0, /* rightshift */
1536 4, /* size (0 = byte, 1 = short, 2 = long) */
1537 64, /* bitsize */
1538 FALSE, /* pc_relative */
1539 0, /* bitpos */
1540 complain_overflow_dont, /* complain_on_overflow */
1541 ppc64_elf_unhandled_reloc, /* special_function */
1542 "R_PPC64_TPREL64", /* name */
1543 FALSE, /* partial_inplace */
1544 0, /* src_mask */
1545 ONES (64), /* dst_mask */
1546 FALSE), /* pcrel_offset */
1547
1548 /* A 16 bit tprel reloc. */
1549 HOWTO (R_PPC64_TPREL16,
1550 0, /* rightshift */
1551 1, /* size (0 = byte, 1 = short, 2 = long) */
1552 16, /* bitsize */
1553 FALSE, /* pc_relative */
1554 0, /* bitpos */
1555 complain_overflow_signed, /* complain_on_overflow */
1556 ppc64_elf_unhandled_reloc, /* special_function */
1557 "R_PPC64_TPREL16", /* name */
1558 FALSE, /* partial_inplace */
1559 0, /* src_mask */
1560 0xffff, /* dst_mask */
1561 FALSE), /* pcrel_offset */
1562
1563 /* Like TPREL16, but no overflow. */
1564 HOWTO (R_PPC64_TPREL16_LO,
1565 0, /* rightshift */
1566 1, /* size (0 = byte, 1 = short, 2 = long) */
1567 16, /* bitsize */
1568 FALSE, /* pc_relative */
1569 0, /* bitpos */
1570 complain_overflow_dont, /* complain_on_overflow */
1571 ppc64_elf_unhandled_reloc, /* special_function */
1572 "R_PPC64_TPREL16_LO", /* name */
1573 FALSE, /* partial_inplace */
1574 0, /* src_mask */
1575 0xffff, /* dst_mask */
1576 FALSE), /* pcrel_offset */
1577
1578 /* Like TPREL16_LO, but next higher group of 16 bits. */
1579 HOWTO (R_PPC64_TPREL16_HI,
1580 16, /* rightshift */
1581 1, /* size (0 = byte, 1 = short, 2 = long) */
1582 16, /* bitsize */
1583 FALSE, /* pc_relative */
1584 0, /* bitpos */
1585 complain_overflow_signed, /* complain_on_overflow */
1586 ppc64_elf_unhandled_reloc, /* special_function */
1587 "R_PPC64_TPREL16_HI", /* name */
1588 FALSE, /* partial_inplace */
1589 0, /* src_mask */
1590 0xffff, /* dst_mask */
1591 FALSE), /* pcrel_offset */
1592
1593 /* Like TPREL16_HI, but adjust for low 16 bits. */
1594 HOWTO (R_PPC64_TPREL16_HA,
1595 16, /* rightshift */
1596 1, /* size (0 = byte, 1 = short, 2 = long) */
1597 16, /* bitsize */
1598 FALSE, /* pc_relative */
1599 0, /* bitpos */
1600 complain_overflow_signed, /* complain_on_overflow */
1601 ppc64_elf_unhandled_reloc, /* special_function */
1602 "R_PPC64_TPREL16_HA", /* name */
1603 FALSE, /* partial_inplace */
1604 0, /* src_mask */
1605 0xffff, /* dst_mask */
1606 FALSE), /* pcrel_offset */
1607
1608 /* Like TPREL16_HI, but next higher group of 16 bits. */
1609 HOWTO (R_PPC64_TPREL16_HIGHER,
1610 32, /* rightshift */
1611 1, /* size (0 = byte, 1 = short, 2 = long) */
1612 16, /* bitsize */
1613 FALSE, /* pc_relative */
1614 0, /* bitpos */
1615 complain_overflow_dont, /* complain_on_overflow */
1616 ppc64_elf_unhandled_reloc, /* special_function */
1617 "R_PPC64_TPREL16_HIGHER", /* name */
1618 FALSE, /* partial_inplace */
1619 0, /* src_mask */
1620 0xffff, /* dst_mask */
1621 FALSE), /* pcrel_offset */
1622
1623 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1624 HOWTO (R_PPC64_TPREL16_HIGHERA,
1625 32, /* rightshift */
1626 1, /* size (0 = byte, 1 = short, 2 = long) */
1627 16, /* bitsize */
1628 FALSE, /* pc_relative */
1629 0, /* bitpos */
1630 complain_overflow_dont, /* complain_on_overflow */
1631 ppc64_elf_unhandled_reloc, /* special_function */
1632 "R_PPC64_TPREL16_HIGHERA", /* name */
1633 FALSE, /* partial_inplace */
1634 0, /* src_mask */
1635 0xffff, /* dst_mask */
1636 FALSE), /* pcrel_offset */
1637
1638 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1639 HOWTO (R_PPC64_TPREL16_HIGHEST,
1640 48, /* rightshift */
1641 1, /* size (0 = byte, 1 = short, 2 = long) */
1642 16, /* bitsize */
1643 FALSE, /* pc_relative */
1644 0, /* bitpos */
1645 complain_overflow_dont, /* complain_on_overflow */
1646 ppc64_elf_unhandled_reloc, /* special_function */
1647 "R_PPC64_TPREL16_HIGHEST", /* name */
1648 FALSE, /* partial_inplace */
1649 0, /* src_mask */
1650 0xffff, /* dst_mask */
1651 FALSE), /* pcrel_offset */
1652
1653 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1654 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1655 48, /* rightshift */
1656 1, /* size (0 = byte, 1 = short, 2 = long) */
1657 16, /* bitsize */
1658 FALSE, /* pc_relative */
1659 0, /* bitpos */
1660 complain_overflow_dont, /* complain_on_overflow */
1661 ppc64_elf_unhandled_reloc, /* special_function */
1662 "R_PPC64_TPREL16_HIGHESTA", /* name */
1663 FALSE, /* partial_inplace */
1664 0, /* src_mask */
1665 0xffff, /* dst_mask */
1666 FALSE), /* pcrel_offset */
1667
1668 /* Like TPREL16, but for insns with a DS field. */
1669 HOWTO (R_PPC64_TPREL16_DS,
1670 0, /* rightshift */
1671 1, /* size (0 = byte, 1 = short, 2 = long) */
1672 16, /* bitsize */
1673 FALSE, /* pc_relative */
1674 0, /* bitpos */
1675 complain_overflow_signed, /* complain_on_overflow */
1676 ppc64_elf_unhandled_reloc, /* special_function */
1677 "R_PPC64_TPREL16_DS", /* name */
1678 FALSE, /* partial_inplace */
1679 0, /* src_mask */
1680 0xfffc, /* dst_mask */
1681 FALSE), /* pcrel_offset */
1682
1683 /* Like TPREL16_DS, but no overflow. */
1684 HOWTO (R_PPC64_TPREL16_LO_DS,
1685 0, /* rightshift */
1686 1, /* size (0 = byte, 1 = short, 2 = long) */
1687 16, /* bitsize */
1688 FALSE, /* pc_relative */
1689 0, /* bitpos */
1690 complain_overflow_dont, /* complain_on_overflow */
1691 ppc64_elf_unhandled_reloc, /* special_function */
1692 "R_PPC64_TPREL16_LO_DS", /* name */
1693 FALSE, /* partial_inplace */
1694 0, /* src_mask */
1695 0xfffc, /* dst_mask */
1696 FALSE), /* pcrel_offset */
1697
1698 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1699 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1700 to the first entry relative to the TOC base (r2). */
1701 HOWTO (R_PPC64_GOT_TLSGD16,
1702 0, /* rightshift */
1703 1, /* size (0 = byte, 1 = short, 2 = long) */
1704 16, /* bitsize */
1705 FALSE, /* pc_relative */
1706 0, /* bitpos */
1707 complain_overflow_signed, /* complain_on_overflow */
1708 ppc64_elf_unhandled_reloc, /* special_function */
1709 "R_PPC64_GOT_TLSGD16", /* name */
1710 FALSE, /* partial_inplace */
1711 0, /* src_mask */
1712 0xffff, /* dst_mask */
1713 FALSE), /* pcrel_offset */
1714
1715 /* Like GOT_TLSGD16, but no overflow. */
1716 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1717 0, /* rightshift */
1718 1, /* size (0 = byte, 1 = short, 2 = long) */
1719 16, /* bitsize */
1720 FALSE, /* pc_relative */
1721 0, /* bitpos */
1722 complain_overflow_dont, /* complain_on_overflow */
1723 ppc64_elf_unhandled_reloc, /* special_function */
1724 "R_PPC64_GOT_TLSGD16_LO", /* name */
1725 FALSE, /* partial_inplace */
1726 0, /* src_mask */
1727 0xffff, /* dst_mask */
1728 FALSE), /* pcrel_offset */
1729
1730 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1731 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1732 16, /* rightshift */
1733 1, /* size (0 = byte, 1 = short, 2 = long) */
1734 16, /* bitsize */
1735 FALSE, /* pc_relative */
1736 0, /* bitpos */
1737 complain_overflow_signed, /* complain_on_overflow */
1738 ppc64_elf_unhandled_reloc, /* special_function */
1739 "R_PPC64_GOT_TLSGD16_HI", /* name */
1740 FALSE, /* partial_inplace */
1741 0, /* src_mask */
1742 0xffff, /* dst_mask */
1743 FALSE), /* pcrel_offset */
1744
1745 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1746 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1747 16, /* rightshift */
1748 1, /* size (0 = byte, 1 = short, 2 = long) */
1749 16, /* bitsize */
1750 FALSE, /* pc_relative */
1751 0, /* bitpos */
1752 complain_overflow_signed, /* complain_on_overflow */
1753 ppc64_elf_unhandled_reloc, /* special_function */
1754 "R_PPC64_GOT_TLSGD16_HA", /* name */
1755 FALSE, /* partial_inplace */
1756 0, /* src_mask */
1757 0xffff, /* dst_mask */
1758 FALSE), /* pcrel_offset */
1759
1760 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1761 with values (sym+add)@dtpmod and zero, and computes the offset to the
1762 first entry relative to the TOC base (r2). */
1763 HOWTO (R_PPC64_GOT_TLSLD16,
1764 0, /* rightshift */
1765 1, /* size (0 = byte, 1 = short, 2 = long) */
1766 16, /* bitsize */
1767 FALSE, /* pc_relative */
1768 0, /* bitpos */
1769 complain_overflow_signed, /* complain_on_overflow */
1770 ppc64_elf_unhandled_reloc, /* special_function */
1771 "R_PPC64_GOT_TLSLD16", /* name */
1772 FALSE, /* partial_inplace */
1773 0, /* src_mask */
1774 0xffff, /* dst_mask */
1775 FALSE), /* pcrel_offset */
1776
1777 /* Like GOT_TLSLD16, but no overflow. */
1778 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1779 0, /* rightshift */
1780 1, /* size (0 = byte, 1 = short, 2 = long) */
1781 16, /* bitsize */
1782 FALSE, /* pc_relative */
1783 0, /* bitpos */
1784 complain_overflow_dont, /* complain_on_overflow */
1785 ppc64_elf_unhandled_reloc, /* special_function */
1786 "R_PPC64_GOT_TLSLD16_LO", /* name */
1787 FALSE, /* partial_inplace */
1788 0, /* src_mask */
1789 0xffff, /* dst_mask */
1790 FALSE), /* pcrel_offset */
1791
1792 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1793 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1794 16, /* rightshift */
1795 1, /* size (0 = byte, 1 = short, 2 = long) */
1796 16, /* bitsize */
1797 FALSE, /* pc_relative */
1798 0, /* bitpos */
1799 complain_overflow_signed, /* complain_on_overflow */
1800 ppc64_elf_unhandled_reloc, /* special_function */
1801 "R_PPC64_GOT_TLSLD16_HI", /* name */
1802 FALSE, /* partial_inplace */
1803 0, /* src_mask */
1804 0xffff, /* dst_mask */
1805 FALSE), /* pcrel_offset */
1806
1807 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1808 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1809 16, /* rightshift */
1810 1, /* size (0 = byte, 1 = short, 2 = long) */
1811 16, /* bitsize */
1812 FALSE, /* pc_relative */
1813 0, /* bitpos */
1814 complain_overflow_signed, /* complain_on_overflow */
1815 ppc64_elf_unhandled_reloc, /* special_function */
1816 "R_PPC64_GOT_TLSLD16_HA", /* name */
1817 FALSE, /* partial_inplace */
1818 0, /* src_mask */
1819 0xffff, /* dst_mask */
1820 FALSE), /* pcrel_offset */
1821
1822 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1823 the offset to the entry relative to the TOC base (r2). */
1824 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1825 0, /* rightshift */
1826 1, /* size (0 = byte, 1 = short, 2 = long) */
1827 16, /* bitsize */
1828 FALSE, /* pc_relative */
1829 0, /* bitpos */
1830 complain_overflow_signed, /* complain_on_overflow */
1831 ppc64_elf_unhandled_reloc, /* special_function */
1832 "R_PPC64_GOT_DTPREL16_DS", /* name */
1833 FALSE, /* partial_inplace */
1834 0, /* src_mask */
1835 0xfffc, /* dst_mask */
1836 FALSE), /* pcrel_offset */
1837
1838 /* Like GOT_DTPREL16_DS, but no overflow. */
1839 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1840 0, /* rightshift */
1841 1, /* size (0 = byte, 1 = short, 2 = long) */
1842 16, /* bitsize */
1843 FALSE, /* pc_relative */
1844 0, /* bitpos */
1845 complain_overflow_dont, /* complain_on_overflow */
1846 ppc64_elf_unhandled_reloc, /* special_function */
1847 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1848 FALSE, /* partial_inplace */
1849 0, /* src_mask */
1850 0xfffc, /* dst_mask */
1851 FALSE), /* pcrel_offset */
1852
1853 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1854 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1855 16, /* rightshift */
1856 1, /* size (0 = byte, 1 = short, 2 = long) */
1857 16, /* bitsize */
1858 FALSE, /* pc_relative */
1859 0, /* bitpos */
1860 complain_overflow_signed, /* complain_on_overflow */
1861 ppc64_elf_unhandled_reloc, /* special_function */
1862 "R_PPC64_GOT_DTPREL16_HI", /* name */
1863 FALSE, /* partial_inplace */
1864 0, /* src_mask */
1865 0xffff, /* dst_mask */
1866 FALSE), /* pcrel_offset */
1867
1868 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1869 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1870 16, /* rightshift */
1871 1, /* size (0 = byte, 1 = short, 2 = long) */
1872 16, /* bitsize */
1873 FALSE, /* pc_relative */
1874 0, /* bitpos */
1875 complain_overflow_signed, /* complain_on_overflow */
1876 ppc64_elf_unhandled_reloc, /* special_function */
1877 "R_PPC64_GOT_DTPREL16_HA", /* name */
1878 FALSE, /* partial_inplace */
1879 0, /* src_mask */
1880 0xffff, /* dst_mask */
1881 FALSE), /* pcrel_offset */
1882
1883 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1884 offset to the entry relative to the TOC base (r2). */
1885 HOWTO (R_PPC64_GOT_TPREL16_DS,
1886 0, /* rightshift */
1887 1, /* size (0 = byte, 1 = short, 2 = long) */
1888 16, /* bitsize */
1889 FALSE, /* pc_relative */
1890 0, /* bitpos */
1891 complain_overflow_signed, /* complain_on_overflow */
1892 ppc64_elf_unhandled_reloc, /* special_function */
1893 "R_PPC64_GOT_TPREL16_DS", /* name */
1894 FALSE, /* partial_inplace */
1895 0, /* src_mask */
1896 0xfffc, /* dst_mask */
1897 FALSE), /* pcrel_offset */
1898
1899 /* Like GOT_TPREL16_DS, but no overflow. */
1900 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1901 0, /* rightshift */
1902 1, /* size (0 = byte, 1 = short, 2 = long) */
1903 16, /* bitsize */
1904 FALSE, /* pc_relative */
1905 0, /* bitpos */
1906 complain_overflow_dont, /* complain_on_overflow */
1907 ppc64_elf_unhandled_reloc, /* special_function */
1908 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1909 FALSE, /* partial_inplace */
1910 0, /* src_mask */
1911 0xfffc, /* dst_mask */
1912 FALSE), /* pcrel_offset */
1913
1914 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1915 HOWTO (R_PPC64_GOT_TPREL16_HI,
1916 16, /* rightshift */
1917 1, /* size (0 = byte, 1 = short, 2 = long) */
1918 16, /* bitsize */
1919 FALSE, /* pc_relative */
1920 0, /* bitpos */
1921 complain_overflow_signed, /* complain_on_overflow */
1922 ppc64_elf_unhandled_reloc, /* special_function */
1923 "R_PPC64_GOT_TPREL16_HI", /* name */
1924 FALSE, /* partial_inplace */
1925 0, /* src_mask */
1926 0xffff, /* dst_mask */
1927 FALSE), /* pcrel_offset */
1928
1929 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1930 HOWTO (R_PPC64_GOT_TPREL16_HA,
1931 16, /* rightshift */
1932 1, /* size (0 = byte, 1 = short, 2 = long) */
1933 16, /* bitsize */
1934 FALSE, /* pc_relative */
1935 0, /* bitpos */
1936 complain_overflow_signed, /* complain_on_overflow */
1937 ppc64_elf_unhandled_reloc, /* special_function */
1938 "R_PPC64_GOT_TPREL16_HA", /* name */
1939 FALSE, /* partial_inplace */
1940 0, /* src_mask */
1941 0xffff, /* dst_mask */
1942 FALSE), /* pcrel_offset */
1943
1944 HOWTO (R_PPC64_JMP_IREL, /* type */
1945 0, /* rightshift */
1946 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1947 0, /* bitsize */
1948 FALSE, /* pc_relative */
1949 0, /* bitpos */
1950 complain_overflow_dont, /* complain_on_overflow */
1951 ppc64_elf_unhandled_reloc, /* special_function */
1952 "R_PPC64_JMP_IREL", /* name */
1953 FALSE, /* partial_inplace */
1954 0, /* src_mask */
1955 0, /* dst_mask */
1956 FALSE), /* pcrel_offset */
1957
1958 HOWTO (R_PPC64_IRELATIVE, /* type */
1959 0, /* rightshift */
1960 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1961 64, /* bitsize */
1962 FALSE, /* pc_relative */
1963 0, /* bitpos */
1964 complain_overflow_dont, /* complain_on_overflow */
1965 bfd_elf_generic_reloc, /* special_function */
1966 "R_PPC64_IRELATIVE", /* name */
1967 FALSE, /* partial_inplace */
1968 0, /* src_mask */
1969 ONES (64), /* dst_mask */
1970 FALSE), /* pcrel_offset */
1971
1972 /* A 16 bit relative relocation. */
1973 HOWTO (R_PPC64_REL16, /* type */
1974 0, /* rightshift */
1975 1, /* size (0 = byte, 1 = short, 2 = long) */
1976 16, /* bitsize */
1977 TRUE, /* pc_relative */
1978 0, /* bitpos */
1979 complain_overflow_signed, /* complain_on_overflow */
1980 bfd_elf_generic_reloc, /* special_function */
1981 "R_PPC64_REL16", /* name */
1982 FALSE, /* partial_inplace */
1983 0, /* src_mask */
1984 0xffff, /* dst_mask */
1985 TRUE), /* pcrel_offset */
1986
1987 /* A 16 bit relative relocation without overflow. */
1988 HOWTO (R_PPC64_REL16_LO, /* type */
1989 0, /* rightshift */
1990 1, /* size (0 = byte, 1 = short, 2 = long) */
1991 16, /* bitsize */
1992 TRUE, /* pc_relative */
1993 0, /* bitpos */
1994 complain_overflow_dont,/* complain_on_overflow */
1995 bfd_elf_generic_reloc, /* special_function */
1996 "R_PPC64_REL16_LO", /* name */
1997 FALSE, /* partial_inplace */
1998 0, /* src_mask */
1999 0xffff, /* dst_mask */
2000 TRUE), /* pcrel_offset */
2001
2002 /* The high order 16 bits of a relative address. */
2003 HOWTO (R_PPC64_REL16_HI, /* type */
2004 16, /* rightshift */
2005 1, /* size (0 = byte, 1 = short, 2 = long) */
2006 16, /* bitsize */
2007 TRUE, /* pc_relative */
2008 0, /* bitpos */
2009 complain_overflow_signed, /* complain_on_overflow */
2010 bfd_elf_generic_reloc, /* special_function */
2011 "R_PPC64_REL16_HI", /* name */
2012 FALSE, /* partial_inplace */
2013 0, /* src_mask */
2014 0xffff, /* dst_mask */
2015 TRUE), /* pcrel_offset */
2016
2017 /* The high order 16 bits of a relative address, plus 1 if the contents of
2018 the low 16 bits, treated as a signed number, is negative. */
2019 HOWTO (R_PPC64_REL16_HA, /* type */
2020 16, /* rightshift */
2021 1, /* size (0 = byte, 1 = short, 2 = long) */
2022 16, /* bitsize */
2023 TRUE, /* pc_relative */
2024 0, /* bitpos */
2025 complain_overflow_signed, /* complain_on_overflow */
2026 ppc64_elf_ha_reloc, /* special_function */
2027 "R_PPC64_REL16_HA", /* name */
2028 FALSE, /* partial_inplace */
2029 0, /* src_mask */
2030 0xffff, /* dst_mask */
2031 TRUE), /* pcrel_offset */
2032
2033 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2034 HOWTO (R_PPC64_REL16DX_HA, /* type */
2035 16, /* rightshift */
2036 2, /* size (0 = byte, 1 = short, 2 = long) */
2037 16, /* bitsize */
2038 TRUE, /* pc_relative */
2039 0, /* bitpos */
2040 complain_overflow_signed, /* complain_on_overflow */
2041 ppc64_elf_ha_reloc, /* special_function */
2042 "R_PPC64_REL16DX_HA", /* name */
2043 FALSE, /* partial_inplace */
2044 0, /* src_mask */
2045 0x1fffc1, /* dst_mask */
2046 TRUE), /* pcrel_offset */
2047
2048 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2049 HOWTO (R_PPC64_16DX_HA, /* type */
2050 16, /* rightshift */
2051 2, /* size (0 = byte, 1 = short, 2 = long) */
2052 16, /* bitsize */
2053 FALSE, /* pc_relative */
2054 0, /* bitpos */
2055 complain_overflow_signed, /* complain_on_overflow */
2056 ppc64_elf_ha_reloc, /* special_function */
2057 "R_PPC64_16DX_HA", /* name */
2058 FALSE, /* partial_inplace */
2059 0, /* src_mask */
2060 0x1fffc1, /* dst_mask */
2061 FALSE), /* pcrel_offset */
2062
2063 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2064 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2065 16, /* rightshift */
2066 1, /* size (0 = byte, 1 = short, 2 = long) */
2067 16, /* bitsize */
2068 FALSE, /* pc_relative */
2069 0, /* bitpos */
2070 complain_overflow_dont, /* complain_on_overflow */
2071 bfd_elf_generic_reloc, /* special_function */
2072 "R_PPC64_ADDR16_HIGH", /* name */
2073 FALSE, /* partial_inplace */
2074 0, /* src_mask */
2075 0xffff, /* dst_mask */
2076 FALSE), /* pcrel_offset */
2077
2078 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2079 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2080 16, /* rightshift */
2081 1, /* size (0 = byte, 1 = short, 2 = long) */
2082 16, /* bitsize */
2083 FALSE, /* pc_relative */
2084 0, /* bitpos */
2085 complain_overflow_dont, /* complain_on_overflow */
2086 ppc64_elf_ha_reloc, /* special_function */
2087 "R_PPC64_ADDR16_HIGHA", /* name */
2088 FALSE, /* partial_inplace */
2089 0, /* src_mask */
2090 0xffff, /* dst_mask */
2091 FALSE), /* pcrel_offset */
2092
2093 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2094 HOWTO (R_PPC64_DTPREL16_HIGH,
2095 16, /* rightshift */
2096 1, /* size (0 = byte, 1 = short, 2 = long) */
2097 16, /* bitsize */
2098 FALSE, /* pc_relative */
2099 0, /* bitpos */
2100 complain_overflow_dont, /* complain_on_overflow */
2101 ppc64_elf_unhandled_reloc, /* special_function */
2102 "R_PPC64_DTPREL16_HIGH", /* name */
2103 FALSE, /* partial_inplace */
2104 0, /* src_mask */
2105 0xffff, /* dst_mask */
2106 FALSE), /* pcrel_offset */
2107
2108 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2109 HOWTO (R_PPC64_DTPREL16_HIGHA,
2110 16, /* rightshift */
2111 1, /* size (0 = byte, 1 = short, 2 = long) */
2112 16, /* bitsize */
2113 FALSE, /* pc_relative */
2114 0, /* bitpos */
2115 complain_overflow_dont, /* complain_on_overflow */
2116 ppc64_elf_unhandled_reloc, /* special_function */
2117 "R_PPC64_DTPREL16_HIGHA", /* name */
2118 FALSE, /* partial_inplace */
2119 0, /* src_mask */
2120 0xffff, /* dst_mask */
2121 FALSE), /* pcrel_offset */
2122
2123 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2124 HOWTO (R_PPC64_TPREL16_HIGH,
2125 16, /* rightshift */
2126 1, /* size (0 = byte, 1 = short, 2 = long) */
2127 16, /* bitsize */
2128 FALSE, /* pc_relative */
2129 0, /* bitpos */
2130 complain_overflow_dont, /* complain_on_overflow */
2131 ppc64_elf_unhandled_reloc, /* special_function */
2132 "R_PPC64_TPREL16_HIGH", /* name */
2133 FALSE, /* partial_inplace */
2134 0, /* src_mask */
2135 0xffff, /* dst_mask */
2136 FALSE), /* pcrel_offset */
2137
2138 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2139 HOWTO (R_PPC64_TPREL16_HIGHA,
2140 16, /* rightshift */
2141 1, /* size (0 = byte, 1 = short, 2 = long) */
2142 16, /* bitsize */
2143 FALSE, /* pc_relative */
2144 0, /* bitpos */
2145 complain_overflow_dont, /* complain_on_overflow */
2146 ppc64_elf_unhandled_reloc, /* special_function */
2147 "R_PPC64_TPREL16_HIGHA", /* name */
2148 FALSE, /* partial_inplace */
2149 0, /* src_mask */
2150 0xffff, /* dst_mask */
2151 FALSE), /* pcrel_offset */
2152
2153 /* Marker reloc on ELFv2 large-model function entry. */
2154 HOWTO (R_PPC64_ENTRY,
2155 0, /* rightshift */
2156 2, /* size (0 = byte, 1 = short, 2 = long) */
2157 32, /* bitsize */
2158 FALSE, /* pc_relative */
2159 0, /* bitpos */
2160 complain_overflow_dont, /* complain_on_overflow */
2161 bfd_elf_generic_reloc, /* special_function */
2162 "R_PPC64_ENTRY", /* name */
2163 FALSE, /* partial_inplace */
2164 0, /* src_mask */
2165 0, /* dst_mask */
2166 FALSE), /* pcrel_offset */
2167
2168 /* Like ADDR64, but use local entry point of function. */
2169 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2170 0, /* rightshift */
2171 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2172 64, /* bitsize */
2173 FALSE, /* pc_relative */
2174 0, /* bitpos */
2175 complain_overflow_dont, /* complain_on_overflow */
2176 bfd_elf_generic_reloc, /* special_function */
2177 "R_PPC64_ADDR64_LOCAL", /* name */
2178 FALSE, /* partial_inplace */
2179 0, /* src_mask */
2180 ONES (64), /* dst_mask */
2181 FALSE), /* pcrel_offset */
2182
2183 /* GNU extension to record C++ vtable hierarchy. */
2184 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2185 0, /* rightshift */
2186 0, /* size (0 = byte, 1 = short, 2 = long) */
2187 0, /* bitsize */
2188 FALSE, /* pc_relative */
2189 0, /* bitpos */
2190 complain_overflow_dont, /* complain_on_overflow */
2191 NULL, /* special_function */
2192 "R_PPC64_GNU_VTINHERIT", /* name */
2193 FALSE, /* partial_inplace */
2194 0, /* src_mask */
2195 0, /* dst_mask */
2196 FALSE), /* pcrel_offset */
2197
2198 /* GNU extension to record C++ vtable member usage. */
2199 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2200 0, /* rightshift */
2201 0, /* size (0 = byte, 1 = short, 2 = long) */
2202 0, /* bitsize */
2203 FALSE, /* pc_relative */
2204 0, /* bitpos */
2205 complain_overflow_dont, /* complain_on_overflow */
2206 NULL, /* special_function */
2207 "R_PPC64_GNU_VTENTRY", /* name */
2208 FALSE, /* partial_inplace */
2209 0, /* src_mask */
2210 0, /* dst_mask */
2211 FALSE), /* pcrel_offset */
2212 };
2213
2214 \f
2215 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2216 be done. */
2217
2218 static void
2219 ppc_howto_init (void)
2220 {
2221 unsigned int i, type;
2222
2223 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2224 {
2225 type = ppc64_elf_howto_raw[i].type;
2226 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2227 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2228 }
2229 }
2230
2231 static reloc_howto_type *
2232 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2233 bfd_reloc_code_real_type code)
2234 {
2235 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2236
2237 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2238 /* Initialize howto table if needed. */
2239 ppc_howto_init ();
2240
2241 switch (code)
2242 {
2243 default:
2244 return NULL;
2245
2246 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2247 break;
2248 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2249 break;
2250 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2251 break;
2252 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2253 break;
2254 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2255 break;
2256 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2257 break;
2258 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2259 break;
2260 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2261 break;
2262 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2263 break;
2264 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2265 break;
2266 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2267 break;
2268 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2269 break;
2270 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2271 break;
2272 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2273 break;
2274 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2275 break;
2276 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2277 break;
2278 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2279 break;
2280 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2281 break;
2282 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2283 break;
2284 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2285 break;
2286 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2287 break;
2288 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2289 break;
2290 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2291 break;
2292 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2293 break;
2294 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2295 break;
2296 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2297 break;
2298 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2299 break;
2300 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2301 break;
2302 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2303 break;
2304 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2305 break;
2306 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2307 break;
2308 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2309 break;
2310 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2311 break;
2312 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2313 break;
2314 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2315 break;
2316 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2317 break;
2318 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2319 break;
2320 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2321 break;
2322 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2323 break;
2324 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2325 break;
2326 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2327 break;
2328 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2329 break;
2330 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2331 break;
2332 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2333 break;
2334 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2335 break;
2336 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2337 break;
2338 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2339 break;
2340 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2341 break;
2342 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2343 break;
2344 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2345 break;
2346 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2347 break;
2348 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2349 break;
2350 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2351 break;
2352 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2353 break;
2354 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2355 break;
2356 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2357 break;
2358 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2359 break;
2360 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2361 break;
2362 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2363 break;
2364 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2365 break;
2366 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2367 break;
2368 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2369 break;
2370 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2371 break;
2372 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2373 break;
2374 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2375 break;
2376 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2377 break;
2378 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2379 break;
2380 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2381 break;
2382 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2383 break;
2384 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2385 break;
2386 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2387 break;
2388 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2389 break;
2390 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2391 break;
2392 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2393 break;
2394 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2395 break;
2396 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2397 break;
2398 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2399 break;
2400 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2401 break;
2402 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2403 break;
2404 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2405 break;
2406 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2407 break;
2408 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2409 break;
2410 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2411 break;
2412 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2413 break;
2414 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2415 break;
2416 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2417 break;
2418 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2419 break;
2420 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2421 break;
2422 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2423 break;
2424 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2425 break;
2426 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2427 break;
2428 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2429 break;
2430 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2431 break;
2432 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2433 break;
2434 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2435 break;
2436 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2437 break;
2438 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2439 break;
2440 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2441 break;
2442 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2443 break;
2444 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2445 break;
2446 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2447 break;
2448 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2449 break;
2450 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2451 break;
2452 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2453 break;
2454 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2455 break;
2456 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2457 break;
2458 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2459 break;
2460 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2461 break;
2462 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2463 break;
2464 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2465 break;
2466 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2467 break;
2468 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2469 break;
2470 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2471 break;
2472 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2473 break;
2474 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2475 break;
2476 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2477 break;
2478 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2479 break;
2480 }
2481
2482 return ppc64_elf_howto_table[r];
2483 };
2484
2485 static reloc_howto_type *
2486 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2487 const char *r_name)
2488 {
2489 unsigned int i;
2490
2491 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2492 if (ppc64_elf_howto_raw[i].name != NULL
2493 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2494 return &ppc64_elf_howto_raw[i];
2495
2496 return NULL;
2497 }
2498
2499 /* Set the howto pointer for a PowerPC ELF reloc. */
2500
2501 static void
2502 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2503 Elf_Internal_Rela *dst)
2504 {
2505 unsigned int type;
2506
2507 /* Initialize howto table if needed. */
2508 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2509 ppc_howto_init ();
2510
2511 type = ELF64_R_TYPE (dst->r_info);
2512 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2513 {
2514 /* xgettext:c-format */
2515 _bfd_error_handler (_("%B: invalid relocation type %d"),
2516 abfd, (int) type);
2517 type = R_PPC64_NONE;
2518 }
2519 cache_ptr->howto = ppc64_elf_howto_table[type];
2520 }
2521
2522 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2523
2524 static bfd_reloc_status_type
2525 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2526 void *data, asection *input_section,
2527 bfd *output_bfd, char **error_message)
2528 {
2529 enum elf_ppc64_reloc_type r_type;
2530 long insn;
2531 bfd_size_type octets;
2532 bfd_vma value;
2533
2534 /* If this is a relocatable link (output_bfd test tells us), just
2535 call the generic function. Any adjustment will be done at final
2536 link time. */
2537 if (output_bfd != NULL)
2538 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2539 input_section, output_bfd, error_message);
2540
2541 /* Adjust the addend for sign extension of the low 16 bits.
2542 We won't actually be using the low 16 bits, so trashing them
2543 doesn't matter. */
2544 reloc_entry->addend += 0x8000;
2545 r_type = reloc_entry->howto->type;
2546 if (r_type != R_PPC64_REL16DX_HA)
2547 return bfd_reloc_continue;
2548
2549 value = 0;
2550 if (!bfd_is_com_section (symbol->section))
2551 value = symbol->value;
2552 value += (reloc_entry->addend
2553 + symbol->section->output_offset
2554 + symbol->section->output_section->vma);
2555 value -= (reloc_entry->address
2556 + input_section->output_offset
2557 + input_section->output_section->vma);
2558 value = (bfd_signed_vma) value >> 16;
2559
2560 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2561 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2562 insn &= ~0x1fffc1;
2563 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2564 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2565 if (value + 0x8000 > 0xffff)
2566 return bfd_reloc_overflow;
2567 return bfd_reloc_ok;
2568 }
2569
2570 static bfd_reloc_status_type
2571 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2572 void *data, asection *input_section,
2573 bfd *output_bfd, char **error_message)
2574 {
2575 if (output_bfd != NULL)
2576 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2577 input_section, output_bfd, error_message);
2578
2579 if (strcmp (symbol->section->name, ".opd") == 0
2580 && (symbol->section->owner->flags & DYNAMIC) == 0)
2581 {
2582 bfd_vma dest = opd_entry_value (symbol->section,
2583 symbol->value + reloc_entry->addend,
2584 NULL, NULL, FALSE);
2585 if (dest != (bfd_vma) -1)
2586 reloc_entry->addend = dest - (symbol->value
2587 + symbol->section->output_section->vma
2588 + symbol->section->output_offset);
2589 }
2590 else
2591 {
2592 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2593
2594 if (symbol->section->owner != abfd
2595 && symbol->section->owner != NULL
2596 && abiversion (symbol->section->owner) >= 2)
2597 {
2598 unsigned int i;
2599
2600 for (i = 0; i < symbol->section->owner->symcount; ++i)
2601 {
2602 asymbol *symdef = symbol->section->owner->outsymbols[i];
2603
2604 if (strcmp (symdef->name, symbol->name) == 0)
2605 {
2606 elfsym = (elf_symbol_type *) symdef;
2607 break;
2608 }
2609 }
2610 }
2611 reloc_entry->addend
2612 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2613 }
2614 return bfd_reloc_continue;
2615 }
2616
2617 static bfd_reloc_status_type
2618 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2619 void *data, asection *input_section,
2620 bfd *output_bfd, char **error_message)
2621 {
2622 long insn;
2623 enum elf_ppc64_reloc_type r_type;
2624 bfd_size_type octets;
2625 /* Assume 'at' branch hints. */
2626 bfd_boolean is_isa_v2 = TRUE;
2627
2628 /* If this is a relocatable link (output_bfd test tells us), just
2629 call the generic function. Any adjustment will be done at final
2630 link time. */
2631 if (output_bfd != NULL)
2632 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2633 input_section, output_bfd, error_message);
2634
2635 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2636 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2637 insn &= ~(0x01 << 21);
2638 r_type = reloc_entry->howto->type;
2639 if (r_type == R_PPC64_ADDR14_BRTAKEN
2640 || r_type == R_PPC64_REL14_BRTAKEN)
2641 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2642
2643 if (is_isa_v2)
2644 {
2645 /* Set 'a' bit. This is 0b00010 in BO field for branch
2646 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2647 for branch on CTR insns (BO == 1a00t or 1a01t). */
2648 if ((insn & (0x14 << 21)) == (0x04 << 21))
2649 insn |= 0x02 << 21;
2650 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2651 insn |= 0x08 << 21;
2652 else
2653 goto out;
2654 }
2655 else
2656 {
2657 bfd_vma target = 0;
2658 bfd_vma from;
2659
2660 if (!bfd_is_com_section (symbol->section))
2661 target = symbol->value;
2662 target += symbol->section->output_section->vma;
2663 target += symbol->section->output_offset;
2664 target += reloc_entry->addend;
2665
2666 from = (reloc_entry->address
2667 + input_section->output_offset
2668 + input_section->output_section->vma);
2669
2670 /* Invert 'y' bit if not the default. */
2671 if ((bfd_signed_vma) (target - from) < 0)
2672 insn ^= 0x01 << 21;
2673 }
2674 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2675 out:
2676 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2677 input_section, output_bfd, error_message);
2678 }
2679
2680 static bfd_reloc_status_type
2681 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2682 void *data, asection *input_section,
2683 bfd *output_bfd, char **error_message)
2684 {
2685 /* If this is a relocatable link (output_bfd test tells us), just
2686 call the generic function. Any adjustment will be done at final
2687 link time. */
2688 if (output_bfd != NULL)
2689 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2690 input_section, output_bfd, error_message);
2691
2692 /* Subtract the symbol section base address. */
2693 reloc_entry->addend -= symbol->section->output_section->vma;
2694 return bfd_reloc_continue;
2695 }
2696
2697 static bfd_reloc_status_type
2698 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2699 void *data, asection *input_section,
2700 bfd *output_bfd, char **error_message)
2701 {
2702 /* If this is a relocatable link (output_bfd test tells us), just
2703 call the generic function. Any adjustment will be done at final
2704 link time. */
2705 if (output_bfd != NULL)
2706 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2707 input_section, output_bfd, error_message);
2708
2709 /* Subtract the symbol section base address. */
2710 reloc_entry->addend -= symbol->section->output_section->vma;
2711
2712 /* Adjust the addend for sign extension of the low 16 bits. */
2713 reloc_entry->addend += 0x8000;
2714 return bfd_reloc_continue;
2715 }
2716
2717 static bfd_reloc_status_type
2718 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2719 void *data, asection *input_section,
2720 bfd *output_bfd, char **error_message)
2721 {
2722 bfd_vma TOCstart;
2723
2724 /* If this is a relocatable link (output_bfd test tells us), just
2725 call the generic function. Any adjustment will be done at final
2726 link time. */
2727 if (output_bfd != NULL)
2728 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2729 input_section, output_bfd, error_message);
2730
2731 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2732 if (TOCstart == 0)
2733 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2734
2735 /* Subtract the TOC base address. */
2736 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2737 return bfd_reloc_continue;
2738 }
2739
2740 static bfd_reloc_status_type
2741 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2742 void *data, asection *input_section,
2743 bfd *output_bfd, char **error_message)
2744 {
2745 bfd_vma TOCstart;
2746
2747 /* If this is a relocatable link (output_bfd test tells us), just
2748 call the generic function. Any adjustment will be done at final
2749 link time. */
2750 if (output_bfd != NULL)
2751 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2752 input_section, output_bfd, error_message);
2753
2754 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2755 if (TOCstart == 0)
2756 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2757
2758 /* Subtract the TOC base address. */
2759 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2760
2761 /* Adjust the addend for sign extension of the low 16 bits. */
2762 reloc_entry->addend += 0x8000;
2763 return bfd_reloc_continue;
2764 }
2765
2766 static bfd_reloc_status_type
2767 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2768 void *data, asection *input_section,
2769 bfd *output_bfd, char **error_message)
2770 {
2771 bfd_vma TOCstart;
2772 bfd_size_type octets;
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 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2782 if (TOCstart == 0)
2783 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2784
2785 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2786 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2787 return bfd_reloc_ok;
2788 }
2789
2790 static bfd_reloc_status_type
2791 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2792 void *data, asection *input_section,
2793 bfd *output_bfd, char **error_message)
2794 {
2795 /* If this is a relocatable link (output_bfd test tells us), just
2796 call the generic function. Any adjustment will be done at final
2797 link time. */
2798 if (output_bfd != NULL)
2799 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2800 input_section, output_bfd, error_message);
2801
2802 if (error_message != NULL)
2803 {
2804 static char buf[60];
2805 sprintf (buf, "generic linker can't handle %s",
2806 reloc_entry->howto->name);
2807 *error_message = buf;
2808 }
2809 return bfd_reloc_dangerous;
2810 }
2811
2812 /* Track GOT entries needed for a given symbol. We might need more
2813 than one got entry per symbol. */
2814 struct got_entry
2815 {
2816 struct got_entry *next;
2817
2818 /* The symbol addend that we'll be placing in the GOT. */
2819 bfd_vma addend;
2820
2821 /* Unlike other ELF targets, we use separate GOT entries for the same
2822 symbol referenced from different input files. This is to support
2823 automatic multiple TOC/GOT sections, where the TOC base can vary
2824 from one input file to another. After partitioning into TOC groups
2825 we merge entries within the group.
2826
2827 Point to the BFD owning this GOT entry. */
2828 bfd *owner;
2829
2830 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2831 TLS_TPREL or TLS_DTPREL for tls entries. */
2832 unsigned char tls_type;
2833
2834 /* Non-zero if got.ent points to real entry. */
2835 unsigned char is_indirect;
2836
2837 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2838 union
2839 {
2840 bfd_signed_vma refcount;
2841 bfd_vma offset;
2842 struct got_entry *ent;
2843 } got;
2844 };
2845
2846 /* The same for PLT. */
2847 struct plt_entry
2848 {
2849 struct plt_entry *next;
2850
2851 bfd_vma addend;
2852
2853 union
2854 {
2855 bfd_signed_vma refcount;
2856 bfd_vma offset;
2857 } plt;
2858 };
2859
2860 struct ppc64_elf_obj_tdata
2861 {
2862 struct elf_obj_tdata elf;
2863
2864 /* Shortcuts to dynamic linker sections. */
2865 asection *got;
2866 asection *relgot;
2867
2868 /* Used during garbage collection. We attach global symbols defined
2869 on removed .opd entries to this section so that the sym is removed. */
2870 asection *deleted_section;
2871
2872 /* TLS local dynamic got entry handling. Support for multiple GOT
2873 sections means we potentially need one of these for each input bfd. */
2874 struct got_entry tlsld_got;
2875
2876 union {
2877 /* A copy of relocs before they are modified for --emit-relocs. */
2878 Elf_Internal_Rela *relocs;
2879
2880 /* Section contents. */
2881 bfd_byte *contents;
2882 } opd;
2883
2884 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2885 the reloc to be in the range -32768 to 32767. */
2886 unsigned int has_small_toc_reloc : 1;
2887
2888 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2889 instruction not one we handle. */
2890 unsigned int unexpected_toc_insn : 1;
2891 };
2892
2893 #define ppc64_elf_tdata(bfd) \
2894 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2895
2896 #define ppc64_tlsld_got(bfd) \
2897 (&ppc64_elf_tdata (bfd)->tlsld_got)
2898
2899 #define is_ppc64_elf(bfd) \
2900 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2901 && elf_object_id (bfd) == PPC64_ELF_DATA)
2902
2903 /* Override the generic function because we store some extras. */
2904
2905 static bfd_boolean
2906 ppc64_elf_mkobject (bfd *abfd)
2907 {
2908 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2909 PPC64_ELF_DATA);
2910 }
2911
2912 /* Fix bad default arch selected for a 64 bit input bfd when the
2913 default is 32 bit. Also select arch based on apuinfo. */
2914
2915 static bfd_boolean
2916 ppc64_elf_object_p (bfd *abfd)
2917 {
2918 if (!abfd->arch_info->the_default)
2919 return TRUE;
2920
2921 if (abfd->arch_info->bits_per_word == 32)
2922 {
2923 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2924
2925 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2926 {
2927 /* Relies on arch after 32 bit default being 64 bit default. */
2928 abfd->arch_info = abfd->arch_info->next;
2929 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2930 }
2931 }
2932 return _bfd_elf_ppc_set_arch (abfd);
2933 }
2934
2935 /* Support for core dump NOTE sections. */
2936
2937 static bfd_boolean
2938 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2939 {
2940 size_t offset, size;
2941
2942 if (note->descsz != 504)
2943 return FALSE;
2944
2945 /* pr_cursig */
2946 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2947
2948 /* pr_pid */
2949 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2950
2951 /* pr_reg */
2952 offset = 112;
2953 size = 384;
2954
2955 /* Make a ".reg/999" section. */
2956 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2957 size, note->descpos + offset);
2958 }
2959
2960 static bfd_boolean
2961 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2962 {
2963 if (note->descsz != 136)
2964 return FALSE;
2965
2966 elf_tdata (abfd)->core->pid
2967 = bfd_get_32 (abfd, note->descdata + 24);
2968 elf_tdata (abfd)->core->program
2969 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2970 elf_tdata (abfd)->core->command
2971 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2972
2973 return TRUE;
2974 }
2975
2976 static char *
2977 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2978 ...)
2979 {
2980 switch (note_type)
2981 {
2982 default:
2983 return NULL;
2984
2985 case NT_PRPSINFO:
2986 {
2987 char data[136];
2988 va_list ap;
2989
2990 va_start (ap, note_type);
2991 memset (data, 0, sizeof (data));
2992 strncpy (data + 40, va_arg (ap, const char *), 16);
2993 strncpy (data + 56, va_arg (ap, const char *), 80);
2994 va_end (ap);
2995 return elfcore_write_note (abfd, buf, bufsiz,
2996 "CORE", note_type, data, sizeof (data));
2997 }
2998
2999 case NT_PRSTATUS:
3000 {
3001 char data[504];
3002 va_list ap;
3003 long pid;
3004 int cursig;
3005 const void *greg;
3006
3007 va_start (ap, note_type);
3008 memset (data, 0, 112);
3009 pid = va_arg (ap, long);
3010 bfd_put_32 (abfd, pid, data + 32);
3011 cursig = va_arg (ap, int);
3012 bfd_put_16 (abfd, cursig, data + 12);
3013 greg = va_arg (ap, const void *);
3014 memcpy (data + 112, greg, 384);
3015 memset (data + 496, 0, 8);
3016 va_end (ap);
3017 return elfcore_write_note (abfd, buf, bufsiz,
3018 "CORE", note_type, data, sizeof (data));
3019 }
3020 }
3021 }
3022
3023 /* Add extra PPC sections. */
3024
3025 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3026 {
3027 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3028 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3029 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3033 { NULL, 0, 0, 0, 0 }
3034 };
3035
3036 enum _ppc64_sec_type {
3037 sec_normal = 0,
3038 sec_opd = 1,
3039 sec_toc = 2
3040 };
3041
3042 struct _ppc64_elf_section_data
3043 {
3044 struct bfd_elf_section_data elf;
3045
3046 union
3047 {
3048 /* An array with one entry for each opd function descriptor,
3049 and some spares since opd entries may be either 16 or 24 bytes. */
3050 #define OPD_NDX(OFF) ((OFF) >> 4)
3051 struct _opd_sec_data
3052 {
3053 /* Points to the function code section for local opd entries. */
3054 asection **func_sec;
3055
3056 /* After editing .opd, adjust references to opd local syms. */
3057 long *adjust;
3058 } opd;
3059
3060 /* An array for toc sections, indexed by offset/8. */
3061 struct _toc_sec_data
3062 {
3063 /* Specifies the relocation symbol index used at a given toc offset. */
3064 unsigned *symndx;
3065
3066 /* And the relocation addend. */
3067 bfd_vma *add;
3068 } toc;
3069 } u;
3070
3071 enum _ppc64_sec_type sec_type:2;
3072
3073 /* Flag set when small branches are detected. Used to
3074 select suitable defaults for the stub group size. */
3075 unsigned int has_14bit_branch:1;
3076 };
3077
3078 #define ppc64_elf_section_data(sec) \
3079 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3080
3081 static bfd_boolean
3082 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3083 {
3084 if (!sec->used_by_bfd)
3085 {
3086 struct _ppc64_elf_section_data *sdata;
3087 bfd_size_type amt = sizeof (*sdata);
3088
3089 sdata = bfd_zalloc (abfd, amt);
3090 if (sdata == NULL)
3091 return FALSE;
3092 sec->used_by_bfd = sdata;
3093 }
3094
3095 return _bfd_elf_new_section_hook (abfd, sec);
3096 }
3097
3098 static struct _opd_sec_data *
3099 get_opd_info (asection * sec)
3100 {
3101 if (sec != NULL
3102 && ppc64_elf_section_data (sec) != NULL
3103 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3104 return &ppc64_elf_section_data (sec)->u.opd;
3105 return NULL;
3106 }
3107 \f
3108 /* Parameters for the qsort hook. */
3109 static bfd_boolean synthetic_relocatable;
3110 static asection *synthetic_opd;
3111
3112 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3113
3114 static int
3115 compare_symbols (const void *ap, const void *bp)
3116 {
3117 const asymbol *a = * (const asymbol **) ap;
3118 const asymbol *b = * (const asymbol **) bp;
3119
3120 /* Section symbols first. */
3121 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3122 return -1;
3123 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3124 return 1;
3125
3126 /* then .opd symbols. */
3127 if (synthetic_opd != NULL)
3128 {
3129 if (strcmp (a->section->name, ".opd") == 0
3130 && strcmp (b->section->name, ".opd") != 0)
3131 return -1;
3132 if (strcmp (a->section->name, ".opd") != 0
3133 && strcmp (b->section->name, ".opd") == 0)
3134 return 1;
3135 }
3136
3137 /* then other code symbols. */
3138 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3139 == (SEC_CODE | SEC_ALLOC)
3140 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3141 != (SEC_CODE | SEC_ALLOC))
3142 return -1;
3143
3144 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3145 != (SEC_CODE | SEC_ALLOC)
3146 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3147 == (SEC_CODE | SEC_ALLOC))
3148 return 1;
3149
3150 if (synthetic_relocatable)
3151 {
3152 if (a->section->id < b->section->id)
3153 return -1;
3154
3155 if (a->section->id > b->section->id)
3156 return 1;
3157 }
3158
3159 if (a->value + a->section->vma < b->value + b->section->vma)
3160 return -1;
3161
3162 if (a->value + a->section->vma > b->value + b->section->vma)
3163 return 1;
3164
3165 /* For syms with the same value, prefer strong dynamic global function
3166 syms over other syms. */
3167 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3168 return -1;
3169
3170 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3171 return 1;
3172
3173 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3174 return -1;
3175
3176 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3177 return 1;
3178
3179 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3180 return -1;
3181
3182 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3183 return 1;
3184
3185 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3186 return -1;
3187
3188 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3189 return 1;
3190
3191 return a > b;
3192 }
3193
3194 /* Search SYMS for a symbol of the given VALUE. */
3195
3196 static asymbol *
3197 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3198 {
3199 long mid;
3200
3201 if (id == (unsigned) -1)
3202 {
3203 while (lo < hi)
3204 {
3205 mid = (lo + hi) >> 1;
3206 if (syms[mid]->value + syms[mid]->section->vma < value)
3207 lo = mid + 1;
3208 else if (syms[mid]->value + syms[mid]->section->vma > value)
3209 hi = mid;
3210 else
3211 return syms[mid];
3212 }
3213 }
3214 else
3215 {
3216 while (lo < hi)
3217 {
3218 mid = (lo + hi) >> 1;
3219 if (syms[mid]->section->id < id)
3220 lo = mid + 1;
3221 else if (syms[mid]->section->id > id)
3222 hi = mid;
3223 else if (syms[mid]->value < value)
3224 lo = mid + 1;
3225 else if (syms[mid]->value > value)
3226 hi = mid;
3227 else
3228 return syms[mid];
3229 }
3230 }
3231 return NULL;
3232 }
3233
3234 static bfd_boolean
3235 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3236 {
3237 bfd_vma vma = *(bfd_vma *) ptr;
3238 return ((section->flags & SEC_ALLOC) != 0
3239 && section->vma <= vma
3240 && vma < section->vma + section->size);
3241 }
3242
3243 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3244 entry syms. Also generate @plt symbols for the glink branch table.
3245 Returns count of synthetic symbols in RET or -1 on error. */
3246
3247 static long
3248 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3249 long static_count, asymbol **static_syms,
3250 long dyn_count, asymbol **dyn_syms,
3251 asymbol **ret)
3252 {
3253 asymbol *s;
3254 long i;
3255 long count;
3256 char *names;
3257 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3258 asection *opd = NULL;
3259 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3260 asymbol **syms;
3261 int abi = abiversion (abfd);
3262
3263 *ret = NULL;
3264
3265 if (abi < 2)
3266 {
3267 opd = bfd_get_section_by_name (abfd, ".opd");
3268 if (opd == NULL && abi == 1)
3269 return 0;
3270 }
3271
3272 symcount = static_count;
3273 if (!relocatable)
3274 symcount += dyn_count;
3275 if (symcount == 0)
3276 return 0;
3277
3278 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3279 if (syms == NULL)
3280 return -1;
3281
3282 if (!relocatable && static_count != 0 && dyn_count != 0)
3283 {
3284 /* Use both symbol tables. */
3285 memcpy (syms, static_syms, static_count * sizeof (*syms));
3286 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3287 }
3288 else if (!relocatable && static_count == 0)
3289 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3290 else
3291 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3292
3293 synthetic_relocatable = relocatable;
3294 synthetic_opd = opd;
3295 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3296
3297 if (!relocatable && symcount > 1)
3298 {
3299 long j;
3300 /* Trim duplicate syms, since we may have merged the normal and
3301 dynamic symbols. Actually, we only care about syms that have
3302 different values, so trim any with the same value. */
3303 for (i = 1, j = 1; i < symcount; ++i)
3304 if (syms[i - 1]->value + syms[i - 1]->section->vma
3305 != syms[i]->value + syms[i]->section->vma)
3306 syms[j++] = syms[i];
3307 symcount = j;
3308 }
3309
3310 i = 0;
3311 /* Note that here and in compare_symbols we can't compare opd and
3312 sym->section directly. With separate debug info files, the
3313 symbols will be extracted from the debug file while abfd passed
3314 to this function is the real binary. */
3315 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3316 ++i;
3317 codesecsym = i;
3318
3319 for (; i < symcount; ++i)
3320 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3321 != (SEC_CODE | SEC_ALLOC))
3322 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3323 break;
3324 codesecsymend = i;
3325
3326 for (; i < symcount; ++i)
3327 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3328 break;
3329 secsymend = i;
3330
3331 if (opd != NULL)
3332 for (; i < symcount; ++i)
3333 if (strcmp (syms[i]->section->name, ".opd") != 0)
3334 break;
3335 opdsymend = i;
3336
3337 for (; i < symcount; ++i)
3338 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3339 != (SEC_CODE | SEC_ALLOC))
3340 break;
3341 symcount = i;
3342
3343 count = 0;
3344
3345 if (relocatable)
3346 {
3347 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3348 arelent *r;
3349 size_t size;
3350 long relcount;
3351
3352 if (opdsymend == secsymend)
3353 goto done;
3354
3355 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3356 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3357 if (relcount == 0)
3358 goto done;
3359
3360 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3361 {
3362 count = -1;
3363 goto done;
3364 }
3365
3366 size = 0;
3367 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3368 {
3369 asymbol *sym;
3370
3371 while (r < opd->relocation + relcount
3372 && r->address < syms[i]->value + opd->vma)
3373 ++r;
3374
3375 if (r == opd->relocation + relcount)
3376 break;
3377
3378 if (r->address != syms[i]->value + opd->vma)
3379 continue;
3380
3381 if (r->howto->type != R_PPC64_ADDR64)
3382 continue;
3383
3384 sym = *r->sym_ptr_ptr;
3385 if (!sym_exists_at (syms, opdsymend, symcount,
3386 sym->section->id, sym->value + r->addend))
3387 {
3388 ++count;
3389 size += sizeof (asymbol);
3390 size += strlen (syms[i]->name) + 2;
3391 }
3392 }
3393
3394 if (size == 0)
3395 goto done;
3396 s = *ret = bfd_malloc (size);
3397 if (s == NULL)
3398 {
3399 count = -1;
3400 goto done;
3401 }
3402
3403 names = (char *) (s + count);
3404
3405 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3406 {
3407 asymbol *sym;
3408
3409 while (r < opd->relocation + relcount
3410 && r->address < syms[i]->value + opd->vma)
3411 ++r;
3412
3413 if (r == opd->relocation + relcount)
3414 break;
3415
3416 if (r->address != syms[i]->value + opd->vma)
3417 continue;
3418
3419 if (r->howto->type != R_PPC64_ADDR64)
3420 continue;
3421
3422 sym = *r->sym_ptr_ptr;
3423 if (!sym_exists_at (syms, opdsymend, symcount,
3424 sym->section->id, sym->value + r->addend))
3425 {
3426 size_t len;
3427
3428 *s = *syms[i];
3429 s->flags |= BSF_SYNTHETIC;
3430 s->section = sym->section;
3431 s->value = sym->value + r->addend;
3432 s->name = names;
3433 *names++ = '.';
3434 len = strlen (syms[i]->name);
3435 memcpy (names, syms[i]->name, len + 1);
3436 names += len + 1;
3437 /* Have udata.p point back to the original symbol this
3438 synthetic symbol was derived from. */
3439 s->udata.p = syms[i];
3440 s++;
3441 }
3442 }
3443 }
3444 else
3445 {
3446 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3447 bfd_byte *contents = NULL;
3448 size_t size;
3449 long plt_count = 0;
3450 bfd_vma glink_vma = 0, resolv_vma = 0;
3451 asection *dynamic, *glink = NULL, *relplt = NULL;
3452 arelent *p;
3453
3454 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3455 {
3456 free_contents_and_exit_err:
3457 count = -1;
3458 free_contents_and_exit:
3459 if (contents)
3460 free (contents);
3461 goto done;
3462 }
3463
3464 size = 0;
3465 for (i = secsymend; i < opdsymend; ++i)
3466 {
3467 bfd_vma ent;
3468
3469 /* Ignore bogus symbols. */
3470 if (syms[i]->value > opd->size - 8)
3471 continue;
3472
3473 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3474 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3475 {
3476 ++count;
3477 size += sizeof (asymbol);
3478 size += strlen (syms[i]->name) + 2;
3479 }
3480 }
3481
3482 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3483 if (dyn_count != 0
3484 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3485 {
3486 bfd_byte *dynbuf, *extdyn, *extdynend;
3487 size_t extdynsize;
3488 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3489
3490 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3491 goto free_contents_and_exit_err;
3492
3493 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3494 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3495
3496 extdyn = dynbuf;
3497 extdynend = extdyn + dynamic->size;
3498 for (; extdyn < extdynend; extdyn += extdynsize)
3499 {
3500 Elf_Internal_Dyn dyn;
3501 (*swap_dyn_in) (abfd, extdyn, &dyn);
3502
3503 if (dyn.d_tag == DT_NULL)
3504 break;
3505
3506 if (dyn.d_tag == DT_PPC64_GLINK)
3507 {
3508 /* The first glink stub starts at offset 32; see
3509 comment in ppc64_elf_finish_dynamic_sections. */
3510 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3511 /* The .glink section usually does not survive the final
3512 link; search for the section (usually .text) where the
3513 glink stubs now reside. */
3514 glink = bfd_sections_find_if (abfd, section_covers_vma,
3515 &glink_vma);
3516 break;
3517 }
3518 }
3519
3520 free (dynbuf);
3521 }
3522
3523 if (glink != NULL)
3524 {
3525 /* Determine __glink trampoline by reading the relative branch
3526 from the first glink stub. */
3527 bfd_byte buf[4];
3528 unsigned int off = 0;
3529
3530 while (bfd_get_section_contents (abfd, glink, buf,
3531 glink_vma + off - glink->vma, 4))
3532 {
3533 unsigned int insn = bfd_get_32 (abfd, buf);
3534 insn ^= B_DOT;
3535 if ((insn & ~0x3fffffc) == 0)
3536 {
3537 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3538 break;
3539 }
3540 off += 4;
3541 if (off > 4)
3542 break;
3543 }
3544
3545 if (resolv_vma)
3546 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3547
3548 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3549 if (relplt != NULL)
3550 {
3551 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3552 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3553 goto free_contents_and_exit_err;
3554
3555 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3556 size += plt_count * sizeof (asymbol);
3557
3558 p = relplt->relocation;
3559 for (i = 0; i < plt_count; i++, p++)
3560 {
3561 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3562 if (p->addend != 0)
3563 size += sizeof ("+0x") - 1 + 16;
3564 }
3565 }
3566 }
3567
3568 if (size == 0)
3569 goto free_contents_and_exit;
3570 s = *ret = bfd_malloc (size);
3571 if (s == NULL)
3572 goto free_contents_and_exit_err;
3573
3574 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3575
3576 for (i = secsymend; i < opdsymend; ++i)
3577 {
3578 bfd_vma ent;
3579
3580 if (syms[i]->value > opd->size - 8)
3581 continue;
3582
3583 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3584 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3585 {
3586 long lo, hi;
3587 size_t len;
3588 asection *sec = abfd->sections;
3589
3590 *s = *syms[i];
3591 lo = codesecsym;
3592 hi = codesecsymend;
3593 while (lo < hi)
3594 {
3595 long mid = (lo + hi) >> 1;
3596 if (syms[mid]->section->vma < ent)
3597 lo = mid + 1;
3598 else if (syms[mid]->section->vma > ent)
3599 hi = mid;
3600 else
3601 {
3602 sec = syms[mid]->section;
3603 break;
3604 }
3605 }
3606
3607 if (lo >= hi && lo > codesecsym)
3608 sec = syms[lo - 1]->section;
3609
3610 for (; sec != NULL; sec = sec->next)
3611 {
3612 if (sec->vma > ent)
3613 break;
3614 /* SEC_LOAD may not be set if SEC is from a separate debug
3615 info file. */
3616 if ((sec->flags & SEC_ALLOC) == 0)
3617 break;
3618 if ((sec->flags & SEC_CODE) != 0)
3619 s->section = sec;
3620 }
3621 s->flags |= BSF_SYNTHETIC;
3622 s->value = ent - s->section->vma;
3623 s->name = names;
3624 *names++ = '.';
3625 len = strlen (syms[i]->name);
3626 memcpy (names, syms[i]->name, len + 1);
3627 names += len + 1;
3628 /* Have udata.p point back to the original symbol this
3629 synthetic symbol was derived from. */
3630 s->udata.p = syms[i];
3631 s++;
3632 }
3633 }
3634 free (contents);
3635
3636 if (glink != NULL && relplt != NULL)
3637 {
3638 if (resolv_vma)
3639 {
3640 /* Add a symbol for the main glink trampoline. */
3641 memset (s, 0, sizeof *s);
3642 s->the_bfd = abfd;
3643 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3644 s->section = glink;
3645 s->value = resolv_vma - glink->vma;
3646 s->name = names;
3647 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3648 names += sizeof ("__glink_PLTresolve");
3649 s++;
3650 count++;
3651 }
3652
3653 /* FIXME: It would be very much nicer to put sym@plt on the
3654 stub rather than on the glink branch table entry. The
3655 objdump disassembler would then use a sensible symbol
3656 name on plt calls. The difficulty in doing so is
3657 a) finding the stubs, and,
3658 b) matching stubs against plt entries, and,
3659 c) there can be multiple stubs for a given plt entry.
3660
3661 Solving (a) could be done by code scanning, but older
3662 ppc64 binaries used different stubs to current code.
3663 (b) is the tricky one since you need to known the toc
3664 pointer for at least one function that uses a pic stub to
3665 be able to calculate the plt address referenced.
3666 (c) means gdb would need to set multiple breakpoints (or
3667 find the glink branch itself) when setting breakpoints
3668 for pending shared library loads. */
3669 p = relplt->relocation;
3670 for (i = 0; i < plt_count; i++, p++)
3671 {
3672 size_t len;
3673
3674 *s = **p->sym_ptr_ptr;
3675 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3676 we are defining a symbol, ensure one of them is set. */
3677 if ((s->flags & BSF_LOCAL) == 0)
3678 s->flags |= BSF_GLOBAL;
3679 s->flags |= BSF_SYNTHETIC;
3680 s->section = glink;
3681 s->value = glink_vma - glink->vma;
3682 s->name = names;
3683 s->udata.p = NULL;
3684 len = strlen ((*p->sym_ptr_ptr)->name);
3685 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3686 names += len;
3687 if (p->addend != 0)
3688 {
3689 memcpy (names, "+0x", sizeof ("+0x") - 1);
3690 names += sizeof ("+0x") - 1;
3691 bfd_sprintf_vma (abfd, names, p->addend);
3692 names += strlen (names);
3693 }
3694 memcpy (names, "@plt", sizeof ("@plt"));
3695 names += sizeof ("@plt");
3696 s++;
3697 if (abi < 2)
3698 {
3699 glink_vma += 8;
3700 if (i >= 0x8000)
3701 glink_vma += 4;
3702 }
3703 else
3704 glink_vma += 4;
3705 }
3706 count += plt_count;
3707 }
3708 }
3709
3710 done:
3711 free (syms);
3712 return count;
3713 }
3714 \f
3715 /* The following functions are specific to the ELF linker, while
3716 functions above are used generally. Those named ppc64_elf_* are
3717 called by the main ELF linker code. They appear in this file more
3718 or less in the order in which they are called. eg.
3719 ppc64_elf_check_relocs is called early in the link process,
3720 ppc64_elf_finish_dynamic_sections is one of the last functions
3721 called.
3722
3723 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3724 functions have both a function code symbol and a function descriptor
3725 symbol. A call to foo in a relocatable object file looks like:
3726
3727 . .text
3728 . x:
3729 . bl .foo
3730 . nop
3731
3732 The function definition in another object file might be:
3733
3734 . .section .opd
3735 . foo: .quad .foo
3736 . .quad .TOC.@tocbase
3737 . .quad 0
3738 .
3739 . .text
3740 . .foo: blr
3741
3742 When the linker resolves the call during a static link, the branch
3743 unsurprisingly just goes to .foo and the .opd information is unused.
3744 If the function definition is in a shared library, things are a little
3745 different: The call goes via a plt call stub, the opd information gets
3746 copied to the plt, and the linker patches the nop.
3747
3748 . x:
3749 . bl .foo_stub
3750 . ld 2,40(1)
3751 .
3752 .
3753 . .foo_stub:
3754 . std 2,40(1) # in practice, the call stub
3755 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3756 . addi 11,11,Lfoo@toc@l # this is the general idea
3757 . ld 12,0(11)
3758 . ld 2,8(11)
3759 . mtctr 12
3760 . ld 11,16(11)
3761 . bctr
3762 .
3763 . .section .plt
3764 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3765
3766 The "reloc ()" notation is supposed to indicate that the linker emits
3767 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3768 copying.
3769
3770 What are the difficulties here? Well, firstly, the relocations
3771 examined by the linker in check_relocs are against the function code
3772 sym .foo, while the dynamic relocation in the plt is emitted against
3773 the function descriptor symbol, foo. Somewhere along the line, we need
3774 to carefully copy dynamic link information from one symbol to the other.
3775 Secondly, the generic part of the elf linker will make .foo a dynamic
3776 symbol as is normal for most other backends. We need foo dynamic
3777 instead, at least for an application final link. However, when
3778 creating a shared library containing foo, we need to have both symbols
3779 dynamic so that references to .foo are satisfied during the early
3780 stages of linking. Otherwise the linker might decide to pull in a
3781 definition from some other object, eg. a static library.
3782
3783 Update: As of August 2004, we support a new convention. Function
3784 calls may use the function descriptor symbol, ie. "bl foo". This
3785 behaves exactly as "bl .foo". */
3786
3787 /* Of those relocs that might be copied as dynamic relocs, this function
3788 selects those that must be copied when linking a shared library,
3789 even when the symbol is local. */
3790
3791 static int
3792 must_be_dyn_reloc (struct bfd_link_info *info,
3793 enum elf_ppc64_reloc_type r_type)
3794 {
3795 switch (r_type)
3796 {
3797 default:
3798 return 1;
3799
3800 case R_PPC64_REL32:
3801 case R_PPC64_REL64:
3802 case R_PPC64_REL30:
3803 return 0;
3804
3805 case R_PPC64_TPREL16:
3806 case R_PPC64_TPREL16_LO:
3807 case R_PPC64_TPREL16_HI:
3808 case R_PPC64_TPREL16_HA:
3809 case R_PPC64_TPREL16_DS:
3810 case R_PPC64_TPREL16_LO_DS:
3811 case R_PPC64_TPREL16_HIGH:
3812 case R_PPC64_TPREL16_HIGHA:
3813 case R_PPC64_TPREL16_HIGHER:
3814 case R_PPC64_TPREL16_HIGHERA:
3815 case R_PPC64_TPREL16_HIGHEST:
3816 case R_PPC64_TPREL16_HIGHESTA:
3817 case R_PPC64_TPREL64:
3818 return !bfd_link_executable (info);
3819 }
3820 }
3821
3822 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3823 copying dynamic variables from a shared lib into an app's dynbss
3824 section, and instead use a dynamic relocation to point into the
3825 shared lib. With code that gcc generates, it's vital that this be
3826 enabled; In the PowerPC64 ABI, the address of a function is actually
3827 the address of a function descriptor, which resides in the .opd
3828 section. gcc uses the descriptor directly rather than going via the
3829 GOT as some other ABI's do, which means that initialized function
3830 pointers must reference the descriptor. Thus, a function pointer
3831 initialized to the address of a function in a shared library will
3832 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3833 redefines the function descriptor symbol to point to the copy. This
3834 presents a problem as a plt entry for that function is also
3835 initialized from the function descriptor symbol and the copy reloc
3836 may not be initialized first. */
3837 #define ELIMINATE_COPY_RELOCS 1
3838
3839 /* Section name for stubs is the associated section name plus this
3840 string. */
3841 #define STUB_SUFFIX ".stub"
3842
3843 /* Linker stubs.
3844 ppc_stub_long_branch:
3845 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3846 destination, but a 24 bit branch in a stub section will reach.
3847 . b dest
3848
3849 ppc_stub_plt_branch:
3850 Similar to the above, but a 24 bit branch in the stub section won't
3851 reach its destination.
3852 . addis %r11,%r2,xxx@toc@ha
3853 . ld %r12,xxx@toc@l(%r11)
3854 . mtctr %r12
3855 . bctr
3856
3857 ppc_stub_plt_call:
3858 Used to call a function in a shared library. If it so happens that
3859 the plt entry referenced crosses a 64k boundary, then an extra
3860 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3861 . std %r2,40(%r1)
3862 . addis %r11,%r2,xxx@toc@ha
3863 . ld %r12,xxx+0@toc@l(%r11)
3864 . mtctr %r12
3865 . ld %r2,xxx+8@toc@l(%r11)
3866 . ld %r11,xxx+16@toc@l(%r11)
3867 . bctr
3868
3869 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3870 code to adjust the value and save r2 to support multiple toc sections.
3871 A ppc_stub_long_branch with an r2 offset looks like:
3872 . std %r2,40(%r1)
3873 . addis %r2,%r2,off@ha
3874 . addi %r2,%r2,off@l
3875 . b dest
3876
3877 A ppc_stub_plt_branch with an r2 offset looks like:
3878 . std %r2,40(%r1)
3879 . addis %r11,%r2,xxx@toc@ha
3880 . ld %r12,xxx@toc@l(%r11)
3881 . addis %r2,%r2,off@ha
3882 . addi %r2,%r2,off@l
3883 . mtctr %r12
3884 . bctr
3885
3886 In cases where the "addis" instruction would add zero, the "addis" is
3887 omitted and following instructions modified slightly in some cases.
3888 */
3889
3890 enum ppc_stub_type {
3891 ppc_stub_none,
3892 ppc_stub_long_branch,
3893 ppc_stub_long_branch_r2off,
3894 ppc_stub_plt_branch,
3895 ppc_stub_plt_branch_r2off,
3896 ppc_stub_plt_call,
3897 ppc_stub_plt_call_r2save,
3898 ppc_stub_global_entry,
3899 ppc_stub_save_res
3900 };
3901
3902 /* Information on stub grouping. */
3903 struct map_stub
3904 {
3905 /* The stub section. */
3906 asection *stub_sec;
3907 /* This is the section to which stubs in the group will be attached. */
3908 asection *link_sec;
3909 /* Next group. */
3910 struct map_stub *next;
3911 /* Whether to emit a copy of register save/restore functions in this
3912 group. */
3913 int needs_save_res;
3914 };
3915
3916 struct ppc_stub_hash_entry {
3917
3918 /* Base hash table entry structure. */
3919 struct bfd_hash_entry root;
3920
3921 enum ppc_stub_type stub_type;
3922
3923 /* Group information. */
3924 struct map_stub *group;
3925
3926 /* Offset within stub_sec of the beginning of this stub. */
3927 bfd_vma stub_offset;
3928
3929 /* Given the symbol's value and its section we can determine its final
3930 value when building the stubs (so the stub knows where to jump. */
3931 bfd_vma target_value;
3932 asection *target_section;
3933
3934 /* The symbol table entry, if any, that this was derived from. */
3935 struct ppc_link_hash_entry *h;
3936 struct plt_entry *plt_ent;
3937
3938 /* Symbol st_other. */
3939 unsigned char other;
3940 };
3941
3942 struct ppc_branch_hash_entry {
3943
3944 /* Base hash table entry structure. */
3945 struct bfd_hash_entry root;
3946
3947 /* Offset within branch lookup table. */
3948 unsigned int offset;
3949
3950 /* Generation marker. */
3951 unsigned int iter;
3952 };
3953
3954 /* Used to track dynamic relocations for local symbols. */
3955 struct ppc_dyn_relocs
3956 {
3957 struct ppc_dyn_relocs *next;
3958
3959 /* The input section of the reloc. */
3960 asection *sec;
3961
3962 /* Total number of relocs copied for the input section. */
3963 unsigned int count : 31;
3964
3965 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3966 unsigned int ifunc : 1;
3967 };
3968
3969 struct ppc_link_hash_entry
3970 {
3971 struct elf_link_hash_entry elf;
3972
3973 union {
3974 /* A pointer to the most recently used stub hash entry against this
3975 symbol. */
3976 struct ppc_stub_hash_entry *stub_cache;
3977
3978 /* A pointer to the next symbol starting with a '.' */
3979 struct ppc_link_hash_entry *next_dot_sym;
3980 } u;
3981
3982 /* Track dynamic relocs copied for this symbol. */
3983 struct elf_dyn_relocs *dyn_relocs;
3984
3985 /* Chain of aliases referring to a weakdef. */
3986 struct ppc_link_hash_entry *weakref;
3987
3988 /* Link between function code and descriptor symbols. */
3989 struct ppc_link_hash_entry *oh;
3990
3991 /* Flag function code and descriptor symbols. */
3992 unsigned int is_func:1;
3993 unsigned int is_func_descriptor:1;
3994 unsigned int fake:1;
3995
3996 /* Whether global opd/toc sym has been adjusted or not.
3997 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3998 should be set for all globals defined in any opd/toc section. */
3999 unsigned int adjust_done:1;
4000
4001 /* Set if this is an out-of-line register save/restore function,
4002 with non-standard calling convention. */
4003 unsigned int save_res:1;
4004
4005 /* Contexts in which symbol is used in the GOT (or TOC).
4006 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4007 corresponding relocs are encountered during check_relocs.
4008 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4009 indicate the corresponding GOT entry type is not needed.
4010 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4011 a TPREL one. We use a separate flag rather than setting TPREL
4012 just for convenience in distinguishing the two cases. */
4013 #define TLS_GD 1 /* GD reloc. */
4014 #define TLS_LD 2 /* LD reloc. */
4015 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4016 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4017 #define TLS_TLS 16 /* Any TLS reloc. */
4018 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4019 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4020 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4021 unsigned char tls_mask;
4022 };
4023
4024 /* ppc64 ELF linker hash table. */
4025
4026 struct ppc_link_hash_table
4027 {
4028 struct elf_link_hash_table elf;
4029
4030 /* The stub hash table. */
4031 struct bfd_hash_table stub_hash_table;
4032
4033 /* Another hash table for plt_branch stubs. */
4034 struct bfd_hash_table branch_hash_table;
4035
4036 /* Hash table for function prologue tocsave. */
4037 htab_t tocsave_htab;
4038
4039 /* Various options and other info passed from the linker. */
4040 struct ppc64_elf_params *params;
4041
4042 /* The size of sec_info below. */
4043 unsigned int sec_info_arr_size;
4044
4045 /* Per-section array of extra section info. Done this way rather
4046 than as part of ppc64_elf_section_data so we have the info for
4047 non-ppc64 sections. */
4048 struct
4049 {
4050 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4051 bfd_vma toc_off;
4052
4053 union
4054 {
4055 /* The section group that this section belongs to. */
4056 struct map_stub *group;
4057 /* A temp section list pointer. */
4058 asection *list;
4059 } u;
4060 } *sec_info;
4061
4062 /* Linked list of groups. */
4063 struct map_stub *group;
4064
4065 /* Temp used when calculating TOC pointers. */
4066 bfd_vma toc_curr;
4067 bfd *toc_bfd;
4068 asection *toc_first_sec;
4069
4070 /* Used when adding symbols. */
4071 struct ppc_link_hash_entry *dot_syms;
4072
4073 /* Shortcuts to get to dynamic linker sections. */
4074 asection *glink;
4075 asection *sfpr;
4076 asection *brlt;
4077 asection *relbrlt;
4078 asection *glink_eh_frame;
4079
4080 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4081 struct ppc_link_hash_entry *tls_get_addr;
4082 struct ppc_link_hash_entry *tls_get_addr_fd;
4083
4084 /* The size of reliplt used by got entry relocs. */
4085 bfd_size_type got_reli_size;
4086
4087 /* Statistics. */
4088 unsigned long stub_count[ppc_stub_global_entry];
4089
4090 /* Number of stubs against global syms. */
4091 unsigned long stub_globals;
4092
4093 /* Set if we're linking code with function descriptors. */
4094 unsigned int opd_abi:1;
4095
4096 /* Support for multiple toc sections. */
4097 unsigned int do_multi_toc:1;
4098 unsigned int multi_toc_needed:1;
4099 unsigned int second_toc_pass:1;
4100 unsigned int do_toc_opt:1;
4101
4102 /* Set on error. */
4103 unsigned int stub_error:1;
4104
4105 /* Whether func_desc_adjust needs to be run over symbols. */
4106 unsigned int need_func_desc_adj:1;
4107
4108 /* Whether there exist local gnu indirect function resolvers,
4109 referenced by dynamic relocations. */
4110 unsigned int local_ifunc_resolver:1;
4111 unsigned int maybe_local_ifunc_resolver:1;
4112
4113 /* Incremented every time we size stubs. */
4114 unsigned int stub_iteration;
4115
4116 /* Small local sym cache. */
4117 struct sym_cache sym_cache;
4118 };
4119
4120 /* Rename some of the generic section flags to better document how they
4121 are used here. */
4122
4123 /* Nonzero if this section has TLS related relocations. */
4124 #define has_tls_reloc sec_flg0
4125
4126 /* Nonzero if this section has a call to __tls_get_addr. */
4127 #define has_tls_get_addr_call sec_flg1
4128
4129 /* Nonzero if this section has any toc or got relocs. */
4130 #define has_toc_reloc sec_flg2
4131
4132 /* Nonzero if this section has a call to another section that uses
4133 the toc or got. */
4134 #define makes_toc_func_call sec_flg3
4135
4136 /* Recursion protection when determining above flag. */
4137 #define call_check_in_progress sec_flg4
4138 #define call_check_done sec_flg5
4139
4140 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4141
4142 #define ppc_hash_table(p) \
4143 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4144 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4145
4146 #define ppc_stub_hash_lookup(table, string, create, copy) \
4147 ((struct ppc_stub_hash_entry *) \
4148 bfd_hash_lookup ((table), (string), (create), (copy)))
4149
4150 #define ppc_branch_hash_lookup(table, string, create, copy) \
4151 ((struct ppc_branch_hash_entry *) \
4152 bfd_hash_lookup ((table), (string), (create), (copy)))
4153
4154 /* Create an entry in the stub hash table. */
4155
4156 static struct bfd_hash_entry *
4157 stub_hash_newfunc (struct bfd_hash_entry *entry,
4158 struct bfd_hash_table *table,
4159 const char *string)
4160 {
4161 /* Allocate the structure if it has not already been allocated by a
4162 subclass. */
4163 if (entry == NULL)
4164 {
4165 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4166 if (entry == NULL)
4167 return entry;
4168 }
4169
4170 /* Call the allocation method of the superclass. */
4171 entry = bfd_hash_newfunc (entry, table, string);
4172 if (entry != NULL)
4173 {
4174 struct ppc_stub_hash_entry *eh;
4175
4176 /* Initialize the local fields. */
4177 eh = (struct ppc_stub_hash_entry *) entry;
4178 eh->stub_type = ppc_stub_none;
4179 eh->group = NULL;
4180 eh->stub_offset = 0;
4181 eh->target_value = 0;
4182 eh->target_section = NULL;
4183 eh->h = NULL;
4184 eh->plt_ent = NULL;
4185 eh->other = 0;
4186 }
4187
4188 return entry;
4189 }
4190
4191 /* Create an entry in the branch hash table. */
4192
4193 static struct bfd_hash_entry *
4194 branch_hash_newfunc (struct bfd_hash_entry *entry,
4195 struct bfd_hash_table *table,
4196 const char *string)
4197 {
4198 /* Allocate the structure if it has not already been allocated by a
4199 subclass. */
4200 if (entry == NULL)
4201 {
4202 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4203 if (entry == NULL)
4204 return entry;
4205 }
4206
4207 /* Call the allocation method of the superclass. */
4208 entry = bfd_hash_newfunc (entry, table, string);
4209 if (entry != NULL)
4210 {
4211 struct ppc_branch_hash_entry *eh;
4212
4213 /* Initialize the local fields. */
4214 eh = (struct ppc_branch_hash_entry *) entry;
4215 eh->offset = 0;
4216 eh->iter = 0;
4217 }
4218
4219 return entry;
4220 }
4221
4222 /* Create an entry in a ppc64 ELF linker hash table. */
4223
4224 static struct bfd_hash_entry *
4225 link_hash_newfunc (struct bfd_hash_entry *entry,
4226 struct bfd_hash_table *table,
4227 const char *string)
4228 {
4229 /* Allocate the structure if it has not already been allocated by a
4230 subclass. */
4231 if (entry == NULL)
4232 {
4233 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4234 if (entry == NULL)
4235 return entry;
4236 }
4237
4238 /* Call the allocation method of the superclass. */
4239 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4240 if (entry != NULL)
4241 {
4242 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4243
4244 memset (&eh->u.stub_cache, 0,
4245 (sizeof (struct ppc_link_hash_entry)
4246 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4247
4248 /* When making function calls, old ABI code references function entry
4249 points (dot symbols), while new ABI code references the function
4250 descriptor symbol. We need to make any combination of reference and
4251 definition work together, without breaking archive linking.
4252
4253 For a defined function "foo" and an undefined call to "bar":
4254 An old object defines "foo" and ".foo", references ".bar" (possibly
4255 "bar" too).
4256 A new object defines "foo" and references "bar".
4257
4258 A new object thus has no problem with its undefined symbols being
4259 satisfied by definitions in an old object. On the other hand, the
4260 old object won't have ".bar" satisfied by a new object.
4261
4262 Keep a list of newly added dot-symbols. */
4263
4264 if (string[0] == '.')
4265 {
4266 struct ppc_link_hash_table *htab;
4267
4268 htab = (struct ppc_link_hash_table *) table;
4269 eh->u.next_dot_sym = htab->dot_syms;
4270 htab->dot_syms = eh;
4271 }
4272 }
4273
4274 return entry;
4275 }
4276
4277 struct tocsave_entry {
4278 asection *sec;
4279 bfd_vma offset;
4280 };
4281
4282 static hashval_t
4283 tocsave_htab_hash (const void *p)
4284 {
4285 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4286 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4287 }
4288
4289 static int
4290 tocsave_htab_eq (const void *p1, const void *p2)
4291 {
4292 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4293 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4294 return e1->sec == e2->sec && e1->offset == e2->offset;
4295 }
4296
4297 /* Destroy a ppc64 ELF linker hash table. */
4298
4299 static void
4300 ppc64_elf_link_hash_table_free (bfd *obfd)
4301 {
4302 struct ppc_link_hash_table *htab;
4303
4304 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4305 if (htab->tocsave_htab)
4306 htab_delete (htab->tocsave_htab);
4307 bfd_hash_table_free (&htab->branch_hash_table);
4308 bfd_hash_table_free (&htab->stub_hash_table);
4309 _bfd_elf_link_hash_table_free (obfd);
4310 }
4311
4312 /* Create a ppc64 ELF linker hash table. */
4313
4314 static struct bfd_link_hash_table *
4315 ppc64_elf_link_hash_table_create (bfd *abfd)
4316 {
4317 struct ppc_link_hash_table *htab;
4318 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4319
4320 htab = bfd_zmalloc (amt);
4321 if (htab == NULL)
4322 return NULL;
4323
4324 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4325 sizeof (struct ppc_link_hash_entry),
4326 PPC64_ELF_DATA))
4327 {
4328 free (htab);
4329 return NULL;
4330 }
4331
4332 /* Init the stub hash table too. */
4333 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4334 sizeof (struct ppc_stub_hash_entry)))
4335 {
4336 _bfd_elf_link_hash_table_free (abfd);
4337 return NULL;
4338 }
4339
4340 /* And the branch hash table. */
4341 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4342 sizeof (struct ppc_branch_hash_entry)))
4343 {
4344 bfd_hash_table_free (&htab->stub_hash_table);
4345 _bfd_elf_link_hash_table_free (abfd);
4346 return NULL;
4347 }
4348
4349 htab->tocsave_htab = htab_try_create (1024,
4350 tocsave_htab_hash,
4351 tocsave_htab_eq,
4352 NULL);
4353 if (htab->tocsave_htab == NULL)
4354 {
4355 ppc64_elf_link_hash_table_free (abfd);
4356 return NULL;
4357 }
4358 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4359
4360 /* Initializing two fields of the union is just cosmetic. We really
4361 only care about glist, but when compiled on a 32-bit host the
4362 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4363 debugger inspection of these fields look nicer. */
4364 htab->elf.init_got_refcount.refcount = 0;
4365 htab->elf.init_got_refcount.glist = NULL;
4366 htab->elf.init_plt_refcount.refcount = 0;
4367 htab->elf.init_plt_refcount.glist = NULL;
4368 htab->elf.init_got_offset.offset = 0;
4369 htab->elf.init_got_offset.glist = NULL;
4370 htab->elf.init_plt_offset.offset = 0;
4371 htab->elf.init_plt_offset.glist = NULL;
4372
4373 return &htab->elf.root;
4374 }
4375
4376 /* Create sections for linker generated code. */
4377
4378 static bfd_boolean
4379 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4380 {
4381 struct ppc_link_hash_table *htab;
4382 flagword flags;
4383
4384 htab = ppc_hash_table (info);
4385
4386 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4387 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4388 if (htab->params->save_restore_funcs)
4389 {
4390 /* Create .sfpr for code to save and restore fp regs. */
4391 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4392 flags);
4393 if (htab->sfpr == NULL
4394 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4395 return FALSE;
4396 }
4397
4398 if (bfd_link_relocatable (info))
4399 return TRUE;
4400
4401 /* Create .glink for lazy dynamic linking support. */
4402 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4403 flags);
4404 if (htab->glink == NULL
4405 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4406 return FALSE;
4407
4408 if (!info->no_ld_generated_unwind_info)
4409 {
4410 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4411 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4412 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4413 ".eh_frame",
4414 flags);
4415 if (htab->glink_eh_frame == NULL
4416 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4417 return FALSE;
4418 }
4419
4420 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4421 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4422 if (htab->elf.iplt == NULL
4423 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4424 return FALSE;
4425
4426 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4427 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4428 htab->elf.irelplt
4429 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4430 if (htab->elf.irelplt == NULL
4431 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4432 return FALSE;
4433
4434 /* Create branch lookup table for plt_branch stubs. */
4435 flags = (SEC_ALLOC | SEC_LOAD
4436 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4437 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4438 flags);
4439 if (htab->brlt == NULL
4440 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4441 return FALSE;
4442
4443 if (!bfd_link_pic (info))
4444 return TRUE;
4445
4446 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4447 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4448 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4449 ".rela.branch_lt",
4450 flags);
4451 if (htab->relbrlt == NULL
4452 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4453 return FALSE;
4454
4455 return TRUE;
4456 }
4457
4458 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4459
4460 bfd_boolean
4461 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4462 struct ppc64_elf_params *params)
4463 {
4464 struct ppc_link_hash_table *htab;
4465
4466 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4467
4468 /* Always hook our dynamic sections into the first bfd, which is the
4469 linker created stub bfd. This ensures that the GOT header is at
4470 the start of the output TOC section. */
4471 htab = ppc_hash_table (info);
4472 htab->elf.dynobj = params->stub_bfd;
4473 htab->params = params;
4474
4475 return create_linkage_sections (htab->elf.dynobj, info);
4476 }
4477
4478 /* Build a name for an entry in the stub hash table. */
4479
4480 static char *
4481 ppc_stub_name (const asection *input_section,
4482 const asection *sym_sec,
4483 const struct ppc_link_hash_entry *h,
4484 const Elf_Internal_Rela *rel)
4485 {
4486 char *stub_name;
4487 ssize_t len;
4488
4489 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4490 offsets from a sym as a branch target? In fact, we could
4491 probably assume the addend is always zero. */
4492 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4493
4494 if (h)
4495 {
4496 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4497 stub_name = bfd_malloc (len);
4498 if (stub_name == NULL)
4499 return stub_name;
4500
4501 len = sprintf (stub_name, "%08x.%s+%x",
4502 input_section->id & 0xffffffff,
4503 h->elf.root.root.string,
4504 (int) rel->r_addend & 0xffffffff);
4505 }
4506 else
4507 {
4508 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4509 stub_name = bfd_malloc (len);
4510 if (stub_name == NULL)
4511 return stub_name;
4512
4513 len = sprintf (stub_name, "%08x.%x:%x+%x",
4514 input_section->id & 0xffffffff,
4515 sym_sec->id & 0xffffffff,
4516 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4517 (int) rel->r_addend & 0xffffffff);
4518 }
4519 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4520 stub_name[len - 2] = 0;
4521 return stub_name;
4522 }
4523
4524 /* Look up an entry in the stub hash. Stub entries are cached because
4525 creating the stub name takes a bit of time. */
4526
4527 static struct ppc_stub_hash_entry *
4528 ppc_get_stub_entry (const asection *input_section,
4529 const asection *sym_sec,
4530 struct ppc_link_hash_entry *h,
4531 const Elf_Internal_Rela *rel,
4532 struct ppc_link_hash_table *htab)
4533 {
4534 struct ppc_stub_hash_entry *stub_entry;
4535 struct map_stub *group;
4536
4537 /* If this input section is part of a group of sections sharing one
4538 stub section, then use the id of the first section in the group.
4539 Stub names need to include a section id, as there may well be
4540 more than one stub used to reach say, printf, and we need to
4541 distinguish between them. */
4542 group = htab->sec_info[input_section->id].u.group;
4543 if (group == NULL)
4544 return NULL;
4545
4546 if (h != NULL && h->u.stub_cache != NULL
4547 && h->u.stub_cache->h == h
4548 && h->u.stub_cache->group == group)
4549 {
4550 stub_entry = h->u.stub_cache;
4551 }
4552 else
4553 {
4554 char *stub_name;
4555
4556 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4557 if (stub_name == NULL)
4558 return NULL;
4559
4560 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4561 stub_name, FALSE, FALSE);
4562 if (h != NULL)
4563 h->u.stub_cache = stub_entry;
4564
4565 free (stub_name);
4566 }
4567
4568 return stub_entry;
4569 }
4570
4571 /* Add a new stub entry to the stub hash. Not all fields of the new
4572 stub entry are initialised. */
4573
4574 static struct ppc_stub_hash_entry *
4575 ppc_add_stub (const char *stub_name,
4576 asection *section,
4577 struct bfd_link_info *info)
4578 {
4579 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4580 struct map_stub *group;
4581 asection *link_sec;
4582 asection *stub_sec;
4583 struct ppc_stub_hash_entry *stub_entry;
4584
4585 group = htab->sec_info[section->id].u.group;
4586 link_sec = group->link_sec;
4587 stub_sec = group->stub_sec;
4588 if (stub_sec == NULL)
4589 {
4590 size_t namelen;
4591 bfd_size_type len;
4592 char *s_name;
4593
4594 namelen = strlen (link_sec->name);
4595 len = namelen + sizeof (STUB_SUFFIX);
4596 s_name = bfd_alloc (htab->params->stub_bfd, len);
4597 if (s_name == NULL)
4598 return NULL;
4599
4600 memcpy (s_name, link_sec->name, namelen);
4601 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4602 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4603 if (stub_sec == NULL)
4604 return NULL;
4605 group->stub_sec = stub_sec;
4606 }
4607
4608 /* Enter this entry into the linker stub hash table. */
4609 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4610 TRUE, FALSE);
4611 if (stub_entry == NULL)
4612 {
4613 /* xgettext:c-format */
4614 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4615 section->owner, stub_name);
4616 return NULL;
4617 }
4618
4619 stub_entry->group = group;
4620 stub_entry->stub_offset = 0;
4621 return stub_entry;
4622 }
4623
4624 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4625 not already done. */
4626
4627 static bfd_boolean
4628 create_got_section (bfd *abfd, struct bfd_link_info *info)
4629 {
4630 asection *got, *relgot;
4631 flagword flags;
4632 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4633
4634 if (!is_ppc64_elf (abfd))
4635 return FALSE;
4636 if (htab == NULL)
4637 return FALSE;
4638
4639 if (!htab->elf.sgot
4640 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4641 return FALSE;
4642
4643 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4644 | SEC_LINKER_CREATED);
4645
4646 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4647 if (!got
4648 || !bfd_set_section_alignment (abfd, got, 3))
4649 return FALSE;
4650
4651 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4652 flags | SEC_READONLY);
4653 if (!relgot
4654 || ! bfd_set_section_alignment (abfd, relgot, 3))
4655 return FALSE;
4656
4657 ppc64_elf_tdata (abfd)->got = got;
4658 ppc64_elf_tdata (abfd)->relgot = relgot;
4659 return TRUE;
4660 }
4661
4662 /* Follow indirect and warning symbol links. */
4663
4664 static inline struct bfd_link_hash_entry *
4665 follow_link (struct bfd_link_hash_entry *h)
4666 {
4667 while (h->type == bfd_link_hash_indirect
4668 || h->type == bfd_link_hash_warning)
4669 h = h->u.i.link;
4670 return h;
4671 }
4672
4673 static inline struct elf_link_hash_entry *
4674 elf_follow_link (struct elf_link_hash_entry *h)
4675 {
4676 return (struct elf_link_hash_entry *) follow_link (&h->root);
4677 }
4678
4679 static inline struct ppc_link_hash_entry *
4680 ppc_follow_link (struct ppc_link_hash_entry *h)
4681 {
4682 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4683 }
4684
4685 /* Merge PLT info on FROM with that on TO. */
4686
4687 static void
4688 move_plt_plist (struct ppc_link_hash_entry *from,
4689 struct ppc_link_hash_entry *to)
4690 {
4691 if (from->elf.plt.plist != NULL)
4692 {
4693 if (to->elf.plt.plist != NULL)
4694 {
4695 struct plt_entry **entp;
4696 struct plt_entry *ent;
4697
4698 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4699 {
4700 struct plt_entry *dent;
4701
4702 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4703 if (dent->addend == ent->addend)
4704 {
4705 dent->plt.refcount += ent->plt.refcount;
4706 *entp = ent->next;
4707 break;
4708 }
4709 if (dent == NULL)
4710 entp = &ent->next;
4711 }
4712 *entp = to->elf.plt.plist;
4713 }
4714
4715 to->elf.plt.plist = from->elf.plt.plist;
4716 from->elf.plt.plist = NULL;
4717 }
4718 }
4719
4720 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4721
4722 static void
4723 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4724 struct elf_link_hash_entry *dir,
4725 struct elf_link_hash_entry *ind)
4726 {
4727 struct ppc_link_hash_entry *edir, *eind;
4728
4729 edir = (struct ppc_link_hash_entry *) dir;
4730 eind = (struct ppc_link_hash_entry *) ind;
4731
4732 edir->is_func |= eind->is_func;
4733 edir->is_func_descriptor |= eind->is_func_descriptor;
4734 edir->tls_mask |= eind->tls_mask;
4735 if (eind->oh != NULL)
4736 edir->oh = ppc_follow_link (eind->oh);
4737
4738 /* If called to transfer flags for a weakdef during processing
4739 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4740 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4741 if (!(ELIMINATE_COPY_RELOCS
4742 && eind->elf.root.type != bfd_link_hash_indirect
4743 && edir->elf.dynamic_adjusted))
4744 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4745
4746 if (edir->elf.versioned != versioned_hidden)
4747 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4748 edir->elf.ref_regular |= eind->elf.ref_regular;
4749 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4750 edir->elf.needs_plt |= eind->elf.needs_plt;
4751 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4752
4753 /* If we were called to copy over info for a weak sym, don't copy
4754 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4755 in order to simplify readonly_dynrelocs and save a field in the
4756 symbol hash entry, but that means dyn_relocs can't be used in any
4757 tests about a specific symbol, or affect other symbol flags which
4758 are then tested.
4759 Chain weakdefs so we can get from the weakdef back to an alias.
4760 The list is circular so that we don't need to use u.weakdef as
4761 well as this list to look at all aliases. */
4762 if (eind->elf.root.type != bfd_link_hash_indirect)
4763 {
4764 struct ppc_link_hash_entry *cur, *add, *next;
4765
4766 add = eind;
4767 do
4768 {
4769 cur = edir->weakref;
4770 if (cur != NULL)
4771 {
4772 do
4773 {
4774 /* We can be called twice for the same symbols.
4775 Don't make multiple loops. */
4776 if (cur == add)
4777 return;
4778 cur = cur->weakref;
4779 } while (cur != edir);
4780 }
4781 next = add->weakref;
4782 if (cur != add)
4783 {
4784 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4785 edir->weakref = add;
4786 }
4787 add = next;
4788 } while (add != NULL && add != eind);
4789 return;
4790 }
4791
4792 /* Copy over any dynamic relocs we may have on the indirect sym. */
4793 if (eind->dyn_relocs != NULL)
4794 {
4795 if (edir->dyn_relocs != NULL)
4796 {
4797 struct elf_dyn_relocs **pp;
4798 struct elf_dyn_relocs *p;
4799
4800 /* Add reloc counts against the indirect sym to the direct sym
4801 list. Merge any entries against the same section. */
4802 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4803 {
4804 struct elf_dyn_relocs *q;
4805
4806 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4807 if (q->sec == p->sec)
4808 {
4809 q->pc_count += p->pc_count;
4810 q->count += p->count;
4811 *pp = p->next;
4812 break;
4813 }
4814 if (q == NULL)
4815 pp = &p->next;
4816 }
4817 *pp = edir->dyn_relocs;
4818 }
4819
4820 edir->dyn_relocs = eind->dyn_relocs;
4821 eind->dyn_relocs = NULL;
4822 }
4823
4824 /* Copy over got entries that we may have already seen to the
4825 symbol which just became indirect. */
4826 if (eind->elf.got.glist != NULL)
4827 {
4828 if (edir->elf.got.glist != NULL)
4829 {
4830 struct got_entry **entp;
4831 struct got_entry *ent;
4832
4833 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4834 {
4835 struct got_entry *dent;
4836
4837 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4838 if (dent->addend == ent->addend
4839 && dent->owner == ent->owner
4840 && dent->tls_type == ent->tls_type)
4841 {
4842 dent->got.refcount += ent->got.refcount;
4843 *entp = ent->next;
4844 break;
4845 }
4846 if (dent == NULL)
4847 entp = &ent->next;
4848 }
4849 *entp = edir->elf.got.glist;
4850 }
4851
4852 edir->elf.got.glist = eind->elf.got.glist;
4853 eind->elf.got.glist = NULL;
4854 }
4855
4856 /* And plt entries. */
4857 move_plt_plist (eind, edir);
4858
4859 if (eind->elf.dynindx != -1)
4860 {
4861 if (edir->elf.dynindx != -1)
4862 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4863 edir->elf.dynstr_index);
4864 edir->elf.dynindx = eind->elf.dynindx;
4865 edir->elf.dynstr_index = eind->elf.dynstr_index;
4866 eind->elf.dynindx = -1;
4867 eind->elf.dynstr_index = 0;
4868 }
4869 }
4870
4871 /* Find the function descriptor hash entry from the given function code
4872 hash entry FH. Link the entries via their OH fields. */
4873
4874 static struct ppc_link_hash_entry *
4875 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4876 {
4877 struct ppc_link_hash_entry *fdh = fh->oh;
4878
4879 if (fdh == NULL)
4880 {
4881 const char *fd_name = fh->elf.root.root.string + 1;
4882
4883 fdh = (struct ppc_link_hash_entry *)
4884 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4885 if (fdh == NULL)
4886 return fdh;
4887
4888 fdh->is_func_descriptor = 1;
4889 fdh->oh = fh;
4890 fh->is_func = 1;
4891 fh->oh = fdh;
4892 }
4893
4894 fdh = ppc_follow_link (fdh);
4895 fdh->is_func_descriptor = 1;
4896 fdh->oh = fh;
4897 return fdh;
4898 }
4899
4900 /* Make a fake function descriptor sym for the undefined 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 = fh->elf.root.u.undef.abfd;
4907 struct bfd_link_hash_entry *bh = NULL;
4908 struct ppc_link_hash_entry *fdh;
4909 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4910 ? BSF_WEAK
4911 : BSF_GLOBAL);
4912
4913 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4914 fh->elf.root.root.string + 1,
4915 flags, bfd_und_section_ptr, 0,
4916 NULL, FALSE, FALSE, &bh))
4917 return NULL;
4918
4919 fdh = (struct ppc_link_hash_entry *) bh;
4920 fdh->elf.non_elf = 0;
4921 fdh->fake = 1;
4922 fdh->is_func_descriptor = 1;
4923 fdh->oh = fh;
4924 fh->is_func = 1;
4925 fh->oh = fdh;
4926 return fdh;
4927 }
4928
4929 /* Fix function descriptor symbols defined in .opd sections to be
4930 function type. */
4931
4932 static bfd_boolean
4933 ppc64_elf_add_symbol_hook (bfd *ibfd,
4934 struct bfd_link_info *info,
4935 Elf_Internal_Sym *isym,
4936 const char **name,
4937 flagword *flags ATTRIBUTE_UNUSED,
4938 asection **sec,
4939 bfd_vma *value)
4940 {
4941 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4942 && (ibfd->flags & DYNAMIC) == 0
4943 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4944 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4945
4946 if (*sec != NULL
4947 && strcmp ((*sec)->name, ".opd") == 0)
4948 {
4949 asection *code_sec;
4950
4951 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4952 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4953 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4954
4955 /* If the symbol is a function defined in .opd, and the function
4956 code is in a discarded group, let it appear to be undefined. */
4957 if (!bfd_link_relocatable (info)
4958 && (*sec)->reloc_count != 0
4959 && opd_entry_value (*sec, *value, &code_sec, NULL,
4960 FALSE) != (bfd_vma) -1
4961 && discarded_section (code_sec))
4962 {
4963 *sec = bfd_und_section_ptr;
4964 isym->st_shndx = SHN_UNDEF;
4965 }
4966 }
4967 else if (*sec != NULL
4968 && strcmp ((*sec)->name, ".toc") == 0
4969 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4970 {
4971 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4972 if (htab != NULL)
4973 htab->params->object_in_toc = 1;
4974 }
4975
4976 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4977 {
4978 if (abiversion (ibfd) == 0)
4979 set_abiversion (ibfd, 2);
4980 else if (abiversion (ibfd) == 1)
4981 {
4982 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4983 " for ABI version 1\n"), name);
4984 bfd_set_error (bfd_error_bad_value);
4985 return FALSE;
4986 }
4987 }
4988
4989 return TRUE;
4990 }
4991
4992 /* Merge non-visibility st_other attributes: local entry point. */
4993
4994 static void
4995 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4996 const Elf_Internal_Sym *isym,
4997 bfd_boolean definition,
4998 bfd_boolean dynamic)
4999 {
5000 if (definition && !dynamic)
5001 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5002 | ELF_ST_VISIBILITY (h->other));
5003 }
5004
5005 /* Hook called on merging a symbol. We use this to clear "fake" since
5006 we now have a real symbol. */
5007
5008 static bfd_boolean
5009 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5010 const Elf_Internal_Sym *isym ATTRIBUTE_UNUSED,
5011 asection **psec ATTRIBUTE_UNUSED,
5012 bfd_boolean newdef ATTRIBUTE_UNUSED,
5013 bfd_boolean olddef ATTRIBUTE_UNUSED,
5014 bfd *oldbfd ATTRIBUTE_UNUSED,
5015 const asection *oldsec ATTRIBUTE_UNUSED)
5016 {
5017 ((struct ppc_link_hash_entry *) h)->fake = 0;
5018 return TRUE;
5019 }
5020
5021 /* This function makes an old ABI object reference to ".bar" cause the
5022 inclusion of a new ABI object archive that defines "bar".
5023 NAME is a symbol defined in an archive. Return a symbol in the hash
5024 table that might be satisfied by the archive symbols. */
5025
5026 static struct elf_link_hash_entry *
5027 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5028 struct bfd_link_info *info,
5029 const char *name)
5030 {
5031 struct elf_link_hash_entry *h;
5032 char *dot_name;
5033 size_t len;
5034
5035 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5036 if (h != NULL
5037 /* Don't return this sym if it is a fake function descriptor
5038 created by add_symbol_adjust. */
5039 && !((struct ppc_link_hash_entry *) h)->fake)
5040 return h;
5041
5042 if (name[0] == '.')
5043 return h;
5044
5045 len = strlen (name);
5046 dot_name = bfd_alloc (abfd, len + 2);
5047 if (dot_name == NULL)
5048 return (struct elf_link_hash_entry *) 0 - 1;
5049 dot_name[0] = '.';
5050 memcpy (dot_name + 1, name, len + 1);
5051 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5052 bfd_release (abfd, dot_name);
5053 return h;
5054 }
5055
5056 /* This function satisfies all old ABI object references to ".bar" if a
5057 new ABI object defines "bar". Well, at least, undefined dot symbols
5058 are made weak. This stops later archive searches from including an
5059 object if we already have a function descriptor definition. It also
5060 prevents the linker complaining about undefined symbols.
5061 We also check and correct mismatched symbol visibility here. The
5062 most restrictive visibility of the function descriptor and the
5063 function entry symbol is used. */
5064
5065 static bfd_boolean
5066 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5067 {
5068 struct ppc_link_hash_table *htab;
5069 struct ppc_link_hash_entry *fdh;
5070
5071 if (eh->elf.root.type == bfd_link_hash_warning)
5072 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5073
5074 if (eh->elf.root.type == bfd_link_hash_indirect)
5075 return TRUE;
5076
5077 if (eh->elf.root.root.string[0] != '.')
5078 abort ();
5079
5080 htab = ppc_hash_table (info);
5081 if (htab == NULL)
5082 return FALSE;
5083
5084 fdh = lookup_fdh (eh, htab);
5085 if (fdh == NULL
5086 && !bfd_link_relocatable (info)
5087 && (eh->elf.root.type == bfd_link_hash_undefined
5088 || eh->elf.root.type == bfd_link_hash_undefweak)
5089 && eh->elf.ref_regular)
5090 {
5091 /* Make an undefined function descriptor sym, in order to
5092 pull in an --as-needed shared lib. Archives are handled
5093 elsewhere. */
5094 fdh = make_fdh (info, eh);
5095 if (fdh == NULL)
5096 return FALSE;
5097 }
5098
5099 if (fdh != NULL)
5100 {
5101 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5102 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5103
5104 /* Make both descriptor and entry symbol have the most
5105 constraining visibility of either symbol. */
5106 if (entry_vis < descr_vis)
5107 fdh->elf.other += entry_vis - descr_vis;
5108 else if (entry_vis > descr_vis)
5109 eh->elf.other += descr_vis - entry_vis;
5110
5111 /* Propagate reference flags from entry symbol to function
5112 descriptor symbol. */
5113 fdh->elf.root.non_ir_ref |= eh->elf.root.non_ir_ref;
5114 fdh->elf.ref_regular |= eh->elf.ref_regular;
5115 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5116
5117 if (!fdh->elf.forced_local
5118 && fdh->elf.dynindx == -1
5119 && fdh->elf.versioned != versioned_hidden
5120 && (bfd_link_dll (info)
5121 || fdh->elf.def_dynamic
5122 || fdh->elf.ref_dynamic)
5123 && (eh->elf.ref_regular
5124 || eh->elf.def_regular))
5125 {
5126 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5127 return FALSE;
5128 }
5129 }
5130
5131 return TRUE;
5132 }
5133
5134 /* Set up opd section info and abiversion for IBFD, and process list
5135 of dot-symbols we made in link_hash_newfunc. */
5136
5137 static bfd_boolean
5138 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5139 {
5140 struct ppc_link_hash_table *htab;
5141 struct ppc_link_hash_entry **p, *eh;
5142 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5143
5144 if (opd != NULL && opd->size != 0)
5145 {
5146 if (abiversion (ibfd) == 0)
5147 set_abiversion (ibfd, 1);
5148 else if (abiversion (ibfd) >= 2)
5149 {
5150 /* xgettext:c-format */
5151 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5152 " version %d\n"),
5153 ibfd, abiversion (ibfd));
5154 bfd_set_error (bfd_error_bad_value);
5155 return FALSE;
5156 }
5157
5158 if ((ibfd->flags & DYNAMIC) == 0
5159 && (opd->flags & SEC_RELOC) != 0
5160 && opd->reloc_count != 0
5161 && !bfd_is_abs_section (opd->output_section))
5162 {
5163 /* Garbage collection needs some extra help with .opd sections.
5164 We don't want to necessarily keep everything referenced by
5165 relocs in .opd, as that would keep all functions. Instead,
5166 if we reference an .opd symbol (a function descriptor), we
5167 want to keep the function code symbol's section. This is
5168 easy for global symbols, but for local syms we need to keep
5169 information about the associated function section. */
5170 bfd_size_type amt;
5171 asection **opd_sym_map;
5172
5173 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5174 opd_sym_map = bfd_zalloc (ibfd, amt);
5175 if (opd_sym_map == NULL)
5176 return FALSE;
5177 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5178 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5179 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5180 }
5181 }
5182
5183 if (!is_ppc64_elf (info->output_bfd))
5184 return TRUE;
5185 htab = ppc_hash_table (info);
5186 if (htab == NULL)
5187 return FALSE;
5188
5189 /* For input files without an explicit abiversion in e_flags
5190 we should have flagged any with symbol st_other bits set
5191 as ELFv1 and above flagged those with .opd as ELFv2.
5192 Set the output abiversion if not yet set, and for any input
5193 still ambiguous, take its abiversion from the output.
5194 Differences in ABI are reported later. */
5195 if (abiversion (info->output_bfd) == 0)
5196 set_abiversion (info->output_bfd, abiversion (ibfd));
5197 else if (abiversion (ibfd) == 0)
5198 set_abiversion (ibfd, abiversion (info->output_bfd));
5199
5200 p = &htab->dot_syms;
5201 while ((eh = *p) != NULL)
5202 {
5203 *p = NULL;
5204 if (&eh->elf == htab->elf.hgot)
5205 ;
5206 else if (htab->elf.hgot == NULL
5207 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5208 htab->elf.hgot = &eh->elf;
5209 else if (abiversion (ibfd) <= 1)
5210 {
5211 htab->need_func_desc_adj = 1;
5212 if (!add_symbol_adjust (eh, info))
5213 return FALSE;
5214 }
5215 p = &eh->u.next_dot_sym;
5216 }
5217 return TRUE;
5218 }
5219
5220 /* Undo hash table changes when an --as-needed input file is determined
5221 not to be needed. */
5222
5223 static bfd_boolean
5224 ppc64_elf_notice_as_needed (bfd *ibfd,
5225 struct bfd_link_info *info,
5226 enum notice_asneeded_action act)
5227 {
5228 if (act == notice_not_needed)
5229 {
5230 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5231
5232 if (htab == NULL)
5233 return FALSE;
5234
5235 htab->dot_syms = NULL;
5236 }
5237 return _bfd_elf_notice_as_needed (ibfd, info, act);
5238 }
5239
5240 /* If --just-symbols against a final linked binary, then assume we need
5241 toc adjusting stubs when calling functions defined there. */
5242
5243 static void
5244 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5245 {
5246 if ((sec->flags & SEC_CODE) != 0
5247 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5248 && is_ppc64_elf (sec->owner))
5249 {
5250 if (abiversion (sec->owner) >= 2
5251 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5252 sec->has_toc_reloc = 1;
5253 }
5254 _bfd_elf_link_just_syms (sec, info);
5255 }
5256
5257 static struct plt_entry **
5258 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5259 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5260 {
5261 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5262 struct plt_entry **local_plt;
5263 unsigned char *local_got_tls_masks;
5264
5265 if (local_got_ents == NULL)
5266 {
5267 bfd_size_type size = symtab_hdr->sh_info;
5268
5269 size *= (sizeof (*local_got_ents)
5270 + sizeof (*local_plt)
5271 + sizeof (*local_got_tls_masks));
5272 local_got_ents = bfd_zalloc (abfd, size);
5273 if (local_got_ents == NULL)
5274 return NULL;
5275 elf_local_got_ents (abfd) = local_got_ents;
5276 }
5277
5278 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5279 {
5280 struct got_entry *ent;
5281
5282 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5283 if (ent->addend == r_addend
5284 && ent->owner == abfd
5285 && ent->tls_type == tls_type)
5286 break;
5287 if (ent == NULL)
5288 {
5289 bfd_size_type amt = sizeof (*ent);
5290 ent = bfd_alloc (abfd, amt);
5291 if (ent == NULL)
5292 return FALSE;
5293 ent->next = local_got_ents[r_symndx];
5294 ent->addend = r_addend;
5295 ent->owner = abfd;
5296 ent->tls_type = tls_type;
5297 ent->is_indirect = FALSE;
5298 ent->got.refcount = 0;
5299 local_got_ents[r_symndx] = ent;
5300 }
5301 ent->got.refcount += 1;
5302 }
5303
5304 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5305 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5306 local_got_tls_masks[r_symndx] |= tls_type;
5307
5308 return local_plt + r_symndx;
5309 }
5310
5311 static bfd_boolean
5312 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5313 {
5314 struct plt_entry *ent;
5315
5316 for (ent = *plist; ent != NULL; ent = ent->next)
5317 if (ent->addend == addend)
5318 break;
5319 if (ent == NULL)
5320 {
5321 bfd_size_type amt = sizeof (*ent);
5322 ent = bfd_alloc (abfd, amt);
5323 if (ent == NULL)
5324 return FALSE;
5325 ent->next = *plist;
5326 ent->addend = addend;
5327 ent->plt.refcount = 0;
5328 *plist = ent;
5329 }
5330 ent->plt.refcount += 1;
5331 return TRUE;
5332 }
5333
5334 static bfd_boolean
5335 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5336 {
5337 return (r_type == R_PPC64_REL24
5338 || r_type == R_PPC64_REL14
5339 || r_type == R_PPC64_REL14_BRTAKEN
5340 || r_type == R_PPC64_REL14_BRNTAKEN
5341 || r_type == R_PPC64_ADDR24
5342 || r_type == R_PPC64_ADDR14
5343 || r_type == R_PPC64_ADDR14_BRTAKEN
5344 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5345 }
5346
5347 /* Look through the relocs for a section during the first phase, and
5348 calculate needed space in the global offset table, procedure
5349 linkage table, and dynamic reloc sections. */
5350
5351 static bfd_boolean
5352 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5353 asection *sec, const Elf_Internal_Rela *relocs)
5354 {
5355 struct ppc_link_hash_table *htab;
5356 Elf_Internal_Shdr *symtab_hdr;
5357 struct elf_link_hash_entry **sym_hashes;
5358 const Elf_Internal_Rela *rel;
5359 const Elf_Internal_Rela *rel_end;
5360 asection *sreloc;
5361 asection **opd_sym_map;
5362 struct elf_link_hash_entry *tga, *dottga;
5363
5364 if (bfd_link_relocatable (info))
5365 return TRUE;
5366
5367 /* Don't do anything special with non-loaded, non-alloced sections.
5368 In particular, any relocs in such sections should not affect GOT
5369 and PLT reference counting (ie. we don't allow them to create GOT
5370 or PLT entries), there's no possibility or desire to optimize TLS
5371 relocs, and there's not much point in propagating relocs to shared
5372 libs that the dynamic linker won't relocate. */
5373 if ((sec->flags & SEC_ALLOC) == 0)
5374 return TRUE;
5375
5376 BFD_ASSERT (is_ppc64_elf (abfd));
5377
5378 htab = ppc_hash_table (info);
5379 if (htab == NULL)
5380 return FALSE;
5381
5382 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5383 FALSE, FALSE, TRUE);
5384 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5385 FALSE, FALSE, TRUE);
5386 symtab_hdr = &elf_symtab_hdr (abfd);
5387 sym_hashes = elf_sym_hashes (abfd);
5388 sreloc = NULL;
5389 opd_sym_map = NULL;
5390 if (ppc64_elf_section_data (sec) != NULL
5391 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5392 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5393
5394 rel_end = relocs + sec->reloc_count;
5395 for (rel = relocs; rel < rel_end; rel++)
5396 {
5397 unsigned long r_symndx;
5398 struct elf_link_hash_entry *h;
5399 enum elf_ppc64_reloc_type r_type;
5400 int tls_type;
5401 struct _ppc64_elf_section_data *ppc64_sec;
5402 struct plt_entry **ifunc, **plt_list;
5403
5404 r_symndx = ELF64_R_SYM (rel->r_info);
5405 if (r_symndx < symtab_hdr->sh_info)
5406 h = NULL;
5407 else
5408 {
5409 struct ppc_link_hash_entry *eh;
5410
5411 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5412 h = elf_follow_link (h);
5413 eh = (struct ppc_link_hash_entry *) h;
5414
5415 /* PR15323, ref flags aren't set for references in the same
5416 object. */
5417 h->root.non_ir_ref = 1;
5418 if (eh->is_func && eh->oh != NULL)
5419 eh->oh->elf.root.non_ir_ref = 1;
5420
5421 if (h == htab->elf.hgot)
5422 sec->has_toc_reloc = 1;
5423 }
5424
5425 tls_type = 0;
5426 ifunc = NULL;
5427 if (h != NULL)
5428 {
5429 if (h->type == STT_GNU_IFUNC)
5430 {
5431 h->needs_plt = 1;
5432 ifunc = &h->plt.plist;
5433 }
5434 }
5435 else
5436 {
5437 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5438 abfd, r_symndx);
5439 if (isym == NULL)
5440 return FALSE;
5441
5442 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5443 {
5444 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5445 rel->r_addend, PLT_IFUNC);
5446 if (ifunc == NULL)
5447 return FALSE;
5448 }
5449 }
5450
5451 r_type = ELF64_R_TYPE (rel->r_info);
5452 switch (r_type)
5453 {
5454 case R_PPC64_TLSGD:
5455 case R_PPC64_TLSLD:
5456 /* These special tls relocs tie a call to __tls_get_addr with
5457 its parameter symbol. */
5458 break;
5459
5460 case R_PPC64_GOT_TLSLD16:
5461 case R_PPC64_GOT_TLSLD16_LO:
5462 case R_PPC64_GOT_TLSLD16_HI:
5463 case R_PPC64_GOT_TLSLD16_HA:
5464 tls_type = TLS_TLS | TLS_LD;
5465 goto dogottls;
5466
5467 case R_PPC64_GOT_TLSGD16:
5468 case R_PPC64_GOT_TLSGD16_LO:
5469 case R_PPC64_GOT_TLSGD16_HI:
5470 case R_PPC64_GOT_TLSGD16_HA:
5471 tls_type = TLS_TLS | TLS_GD;
5472 goto dogottls;
5473
5474 case R_PPC64_GOT_TPREL16_DS:
5475 case R_PPC64_GOT_TPREL16_LO_DS:
5476 case R_PPC64_GOT_TPREL16_HI:
5477 case R_PPC64_GOT_TPREL16_HA:
5478 if (bfd_link_pic (info))
5479 info->flags |= DF_STATIC_TLS;
5480 tls_type = TLS_TLS | TLS_TPREL;
5481 goto dogottls;
5482
5483 case R_PPC64_GOT_DTPREL16_DS:
5484 case R_PPC64_GOT_DTPREL16_LO_DS:
5485 case R_PPC64_GOT_DTPREL16_HI:
5486 case R_PPC64_GOT_DTPREL16_HA:
5487 tls_type = TLS_TLS | TLS_DTPREL;
5488 dogottls:
5489 sec->has_tls_reloc = 1;
5490 /* Fall through */
5491
5492 case R_PPC64_GOT16:
5493 case R_PPC64_GOT16_DS:
5494 case R_PPC64_GOT16_HA:
5495 case R_PPC64_GOT16_HI:
5496 case R_PPC64_GOT16_LO:
5497 case R_PPC64_GOT16_LO_DS:
5498 /* This symbol requires a global offset table entry. */
5499 sec->has_toc_reloc = 1;
5500 if (r_type == R_PPC64_GOT_TLSLD16
5501 || r_type == R_PPC64_GOT_TLSGD16
5502 || r_type == R_PPC64_GOT_TPREL16_DS
5503 || r_type == R_PPC64_GOT_DTPREL16_DS
5504 || r_type == R_PPC64_GOT16
5505 || r_type == R_PPC64_GOT16_DS)
5506 {
5507 htab->do_multi_toc = 1;
5508 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5509 }
5510
5511 if (ppc64_elf_tdata (abfd)->got == NULL
5512 && !create_got_section (abfd, info))
5513 return FALSE;
5514
5515 if (h != NULL)
5516 {
5517 struct ppc_link_hash_entry *eh;
5518 struct got_entry *ent;
5519
5520 eh = (struct ppc_link_hash_entry *) h;
5521 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5522 if (ent->addend == rel->r_addend
5523 && ent->owner == abfd
5524 && ent->tls_type == tls_type)
5525 break;
5526 if (ent == NULL)
5527 {
5528 bfd_size_type amt = sizeof (*ent);
5529 ent = bfd_alloc (abfd, amt);
5530 if (ent == NULL)
5531 return FALSE;
5532 ent->next = eh->elf.got.glist;
5533 ent->addend = rel->r_addend;
5534 ent->owner = abfd;
5535 ent->tls_type = tls_type;
5536 ent->is_indirect = FALSE;
5537 ent->got.refcount = 0;
5538 eh->elf.got.glist = ent;
5539 }
5540 ent->got.refcount += 1;
5541 eh->tls_mask |= tls_type;
5542 }
5543 else
5544 /* This is a global offset table entry for a local symbol. */
5545 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5546 rel->r_addend, tls_type))
5547 return FALSE;
5548
5549 /* We may also need a plt entry if the symbol turns out to be
5550 an ifunc. */
5551 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5552 {
5553 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5554 return FALSE;
5555 }
5556 break;
5557
5558 case R_PPC64_PLT16_HA:
5559 case R_PPC64_PLT16_HI:
5560 case R_PPC64_PLT16_LO:
5561 case R_PPC64_PLT32:
5562 case R_PPC64_PLT64:
5563 /* This symbol requires a procedure linkage table entry. */
5564 plt_list = ifunc;
5565 if (h != NULL)
5566 {
5567 h->needs_plt = 1;
5568 if (h->root.root.string[0] == '.'
5569 && h->root.root.string[1] != '\0')
5570 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5571 plt_list = &h->plt.plist;
5572 }
5573 if (plt_list == NULL)
5574 {
5575 /* It does not make sense to have a procedure linkage
5576 table entry for a non-ifunc local symbol. */
5577 info->callbacks->einfo
5578 /* xgettext:c-format */
5579 (_("%H: %s reloc against local symbol\n"),
5580 abfd, sec, rel->r_offset,
5581 ppc64_elf_howto_table[r_type]->name);
5582 bfd_set_error (bfd_error_bad_value);
5583 return FALSE;
5584 }
5585 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5586 return FALSE;
5587 break;
5588
5589 /* The following relocations don't need to propagate the
5590 relocation if linking a shared object since they are
5591 section relative. */
5592 case R_PPC64_SECTOFF:
5593 case R_PPC64_SECTOFF_LO:
5594 case R_PPC64_SECTOFF_HI:
5595 case R_PPC64_SECTOFF_HA:
5596 case R_PPC64_SECTOFF_DS:
5597 case R_PPC64_SECTOFF_LO_DS:
5598 case R_PPC64_DTPREL16:
5599 case R_PPC64_DTPREL16_LO:
5600 case R_PPC64_DTPREL16_HI:
5601 case R_PPC64_DTPREL16_HA:
5602 case R_PPC64_DTPREL16_DS:
5603 case R_PPC64_DTPREL16_LO_DS:
5604 case R_PPC64_DTPREL16_HIGH:
5605 case R_PPC64_DTPREL16_HIGHA:
5606 case R_PPC64_DTPREL16_HIGHER:
5607 case R_PPC64_DTPREL16_HIGHERA:
5608 case R_PPC64_DTPREL16_HIGHEST:
5609 case R_PPC64_DTPREL16_HIGHESTA:
5610 break;
5611
5612 /* Nor do these. */
5613 case R_PPC64_REL16:
5614 case R_PPC64_REL16_LO:
5615 case R_PPC64_REL16_HI:
5616 case R_PPC64_REL16_HA:
5617 case R_PPC64_REL16DX_HA:
5618 break;
5619
5620 /* Not supported as a dynamic relocation. */
5621 case R_PPC64_ADDR64_LOCAL:
5622 if (bfd_link_pic (info))
5623 {
5624 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5625 ppc_howto_init ();
5626 /* xgettext:c-format */
5627 info->callbacks->einfo (_("%H: %s reloc unsupported "
5628 "in shared libraries and PIEs.\n"),
5629 abfd, sec, rel->r_offset,
5630 ppc64_elf_howto_table[r_type]->name);
5631 bfd_set_error (bfd_error_bad_value);
5632 return FALSE;
5633 }
5634 break;
5635
5636 case R_PPC64_TOC16:
5637 case R_PPC64_TOC16_DS:
5638 htab->do_multi_toc = 1;
5639 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5640 /* Fall through. */
5641 case R_PPC64_TOC16_LO:
5642 case R_PPC64_TOC16_HI:
5643 case R_PPC64_TOC16_HA:
5644 case R_PPC64_TOC16_LO_DS:
5645 sec->has_toc_reloc = 1;
5646 break;
5647
5648 /* Marker reloc. */
5649 case R_PPC64_ENTRY:
5650 break;
5651
5652 /* This relocation describes the C++ object vtable hierarchy.
5653 Reconstruct it for later use during GC. */
5654 case R_PPC64_GNU_VTINHERIT:
5655 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5656 return FALSE;
5657 break;
5658
5659 /* This relocation describes which C++ vtable entries are actually
5660 used. Record for later use during GC. */
5661 case R_PPC64_GNU_VTENTRY:
5662 BFD_ASSERT (h != NULL);
5663 if (h != NULL
5664 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5665 return FALSE;
5666 break;
5667
5668 case R_PPC64_REL14:
5669 case R_PPC64_REL14_BRTAKEN:
5670 case R_PPC64_REL14_BRNTAKEN:
5671 {
5672 asection *dest = NULL;
5673
5674 /* Heuristic: If jumping outside our section, chances are
5675 we are going to need a stub. */
5676 if (h != NULL)
5677 {
5678 /* If the sym is weak it may be overridden later, so
5679 don't assume we know where a weak sym lives. */
5680 if (h->root.type == bfd_link_hash_defined)
5681 dest = h->root.u.def.section;
5682 }
5683 else
5684 {
5685 Elf_Internal_Sym *isym;
5686
5687 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5688 abfd, r_symndx);
5689 if (isym == NULL)
5690 return FALSE;
5691
5692 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5693 }
5694
5695 if (dest != sec)
5696 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5697 }
5698 /* Fall through. */
5699
5700 case R_PPC64_REL24:
5701 plt_list = ifunc;
5702 if (h != NULL)
5703 {
5704 h->needs_plt = 1;
5705 if (h->root.root.string[0] == '.'
5706 && h->root.root.string[1] != '\0')
5707 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5708
5709 if (h == tga || h == dottga)
5710 {
5711 sec->has_tls_reloc = 1;
5712 if (rel != relocs
5713 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5714 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5715 /* We have a new-style __tls_get_addr call with
5716 a marker reloc. */
5717 ;
5718 else
5719 /* Mark this section as having an old-style call. */
5720 sec->has_tls_get_addr_call = 1;
5721 }
5722 plt_list = &h->plt.plist;
5723 }
5724
5725 /* We may need a .plt entry if the function this reloc
5726 refers to is in a shared lib. */
5727 if (plt_list
5728 && !update_plt_info (abfd, plt_list, rel->r_addend))
5729 return FALSE;
5730 break;
5731
5732 case R_PPC64_ADDR14:
5733 case R_PPC64_ADDR14_BRNTAKEN:
5734 case R_PPC64_ADDR14_BRTAKEN:
5735 case R_PPC64_ADDR24:
5736 goto dodyn;
5737
5738 case R_PPC64_TPREL64:
5739 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5740 if (bfd_link_pic (info))
5741 info->flags |= DF_STATIC_TLS;
5742 goto dotlstoc;
5743
5744 case R_PPC64_DTPMOD64:
5745 if (rel + 1 < rel_end
5746 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5747 && rel[1].r_offset == rel->r_offset + 8)
5748 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5749 else
5750 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5751 goto dotlstoc;
5752
5753 case R_PPC64_DTPREL64:
5754 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5755 if (rel != relocs
5756 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5757 && rel[-1].r_offset == rel->r_offset - 8)
5758 /* This is the second reloc of a dtpmod, dtprel pair.
5759 Don't mark with TLS_DTPREL. */
5760 goto dodyn;
5761
5762 dotlstoc:
5763 sec->has_tls_reloc = 1;
5764 if (h != NULL)
5765 {
5766 struct ppc_link_hash_entry *eh;
5767 eh = (struct ppc_link_hash_entry *) h;
5768 eh->tls_mask |= tls_type;
5769 }
5770 else
5771 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5772 rel->r_addend, tls_type))
5773 return FALSE;
5774
5775 ppc64_sec = ppc64_elf_section_data (sec);
5776 if (ppc64_sec->sec_type != sec_toc)
5777 {
5778 bfd_size_type amt;
5779
5780 /* One extra to simplify get_tls_mask. */
5781 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5782 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5783 if (ppc64_sec->u.toc.symndx == NULL)
5784 return FALSE;
5785 amt = sec->size * sizeof (bfd_vma) / 8;
5786 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5787 if (ppc64_sec->u.toc.add == NULL)
5788 return FALSE;
5789 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5790 ppc64_sec->sec_type = sec_toc;
5791 }
5792 BFD_ASSERT (rel->r_offset % 8 == 0);
5793 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5794 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5795
5796 /* Mark the second slot of a GD or LD entry.
5797 -1 to indicate GD and -2 to indicate LD. */
5798 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5799 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5800 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5801 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5802 goto dodyn;
5803
5804 case R_PPC64_TPREL16:
5805 case R_PPC64_TPREL16_LO:
5806 case R_PPC64_TPREL16_HI:
5807 case R_PPC64_TPREL16_HA:
5808 case R_PPC64_TPREL16_DS:
5809 case R_PPC64_TPREL16_LO_DS:
5810 case R_PPC64_TPREL16_HIGH:
5811 case R_PPC64_TPREL16_HIGHA:
5812 case R_PPC64_TPREL16_HIGHER:
5813 case R_PPC64_TPREL16_HIGHERA:
5814 case R_PPC64_TPREL16_HIGHEST:
5815 case R_PPC64_TPREL16_HIGHESTA:
5816 if (bfd_link_pic (info))
5817 {
5818 info->flags |= DF_STATIC_TLS;
5819 goto dodyn;
5820 }
5821 break;
5822
5823 case R_PPC64_ADDR64:
5824 if (opd_sym_map != NULL
5825 && rel + 1 < rel_end
5826 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5827 {
5828 if (h != NULL)
5829 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5830 else
5831 {
5832 asection *s;
5833 Elf_Internal_Sym *isym;
5834
5835 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5836 abfd, r_symndx);
5837 if (isym == NULL)
5838 return FALSE;
5839
5840 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5841 if (s != NULL && s != sec)
5842 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5843 }
5844 }
5845 /* Fall through. */
5846
5847 case R_PPC64_ADDR16:
5848 case R_PPC64_ADDR16_DS:
5849 case R_PPC64_ADDR16_HA:
5850 case R_PPC64_ADDR16_HI:
5851 case R_PPC64_ADDR16_HIGH:
5852 case R_PPC64_ADDR16_HIGHA:
5853 case R_PPC64_ADDR16_HIGHER:
5854 case R_PPC64_ADDR16_HIGHERA:
5855 case R_PPC64_ADDR16_HIGHEST:
5856 case R_PPC64_ADDR16_HIGHESTA:
5857 case R_PPC64_ADDR16_LO:
5858 case R_PPC64_ADDR16_LO_DS:
5859 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5860 && rel->r_addend == 0)
5861 {
5862 /* We may need a .plt entry if this reloc refers to a
5863 function in a shared lib. */
5864 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5865 return FALSE;
5866 h->pointer_equality_needed = 1;
5867 }
5868 /* Fall through. */
5869
5870 case R_PPC64_REL30:
5871 case R_PPC64_REL32:
5872 case R_PPC64_REL64:
5873 case R_PPC64_ADDR32:
5874 case R_PPC64_UADDR16:
5875 case R_PPC64_UADDR32:
5876 case R_PPC64_UADDR64:
5877 case R_PPC64_TOC:
5878 if (h != NULL && !bfd_link_pic (info))
5879 /* We may need a copy reloc. */
5880 h->non_got_ref = 1;
5881
5882 /* Don't propagate .opd relocs. */
5883 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5884 break;
5885
5886 /* If we are creating a shared library, and this is a reloc
5887 against a global symbol, or a non PC relative reloc
5888 against a local symbol, then we need to copy the reloc
5889 into the shared library. However, if we are linking with
5890 -Bsymbolic, we do not need to copy a reloc against a
5891 global symbol which is defined in an object we are
5892 including in the link (i.e., DEF_REGULAR is set). At
5893 this point we have not seen all the input files, so it is
5894 possible that DEF_REGULAR is not set now but will be set
5895 later (it is never cleared). In case of a weak definition,
5896 DEF_REGULAR may be cleared later by a strong definition in
5897 a shared library. We account for that possibility below by
5898 storing information in the dyn_relocs field of the hash
5899 table entry. A similar situation occurs when creating
5900 shared libraries and symbol visibility changes render the
5901 symbol local.
5902
5903 If on the other hand, we are creating an executable, we
5904 may need to keep relocations for symbols satisfied by a
5905 dynamic library if we manage to avoid copy relocs for the
5906 symbol. */
5907 dodyn:
5908 if ((bfd_link_pic (info)
5909 && (must_be_dyn_reloc (info, r_type)
5910 || (h != NULL
5911 && (!SYMBOLIC_BIND (info, h)
5912 || h->root.type == bfd_link_hash_defweak
5913 || !h->def_regular))))
5914 || (ELIMINATE_COPY_RELOCS
5915 && !bfd_link_pic (info)
5916 && h != NULL
5917 && (h->root.type == bfd_link_hash_defweak
5918 || !h->def_regular))
5919 || (!bfd_link_pic (info)
5920 && ifunc != NULL))
5921 {
5922 /* We must copy these reloc types into the output file.
5923 Create a reloc section in dynobj and make room for
5924 this reloc. */
5925 if (sreloc == NULL)
5926 {
5927 sreloc = _bfd_elf_make_dynamic_reloc_section
5928 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5929
5930 if (sreloc == NULL)
5931 return FALSE;
5932 }
5933
5934 /* If this is a global symbol, we count the number of
5935 relocations we need for this symbol. */
5936 if (h != NULL)
5937 {
5938 struct elf_dyn_relocs *p;
5939 struct elf_dyn_relocs **head;
5940
5941 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5942 p = *head;
5943 if (p == NULL || p->sec != sec)
5944 {
5945 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5946 if (p == NULL)
5947 return FALSE;
5948 p->next = *head;
5949 *head = p;
5950 p->sec = sec;
5951 p->count = 0;
5952 p->pc_count = 0;
5953 }
5954 p->count += 1;
5955 if (!must_be_dyn_reloc (info, r_type))
5956 p->pc_count += 1;
5957 }
5958 else
5959 {
5960 /* Track dynamic relocs needed for local syms too.
5961 We really need local syms available to do this
5962 easily. Oh well. */
5963 struct ppc_dyn_relocs *p;
5964 struct ppc_dyn_relocs **head;
5965 bfd_boolean is_ifunc;
5966 asection *s;
5967 void *vpp;
5968 Elf_Internal_Sym *isym;
5969
5970 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5971 abfd, r_symndx);
5972 if (isym == NULL)
5973 return FALSE;
5974
5975 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5976 if (s == NULL)
5977 s = sec;
5978
5979 vpp = &elf_section_data (s)->local_dynrel;
5980 head = (struct ppc_dyn_relocs **) vpp;
5981 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5982 p = *head;
5983 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5984 p = p->next;
5985 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5986 {
5987 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5988 if (p == NULL)
5989 return FALSE;
5990 p->next = *head;
5991 *head = p;
5992 p->sec = sec;
5993 p->ifunc = is_ifunc;
5994 p->count = 0;
5995 }
5996 p->count += 1;
5997 }
5998 }
5999 break;
6000
6001 default:
6002 break;
6003 }
6004 }
6005
6006 return TRUE;
6007 }
6008
6009 /* Merge backend specific data from an object file to the output
6010 object file when linking. */
6011
6012 static bfd_boolean
6013 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6014 {
6015 bfd *obfd = info->output_bfd;
6016 unsigned long iflags, oflags;
6017
6018 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6019 return TRUE;
6020
6021 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6022 return TRUE;
6023
6024 if (!_bfd_generic_verify_endian_match (ibfd, info))
6025 return FALSE;
6026
6027 iflags = elf_elfheader (ibfd)->e_flags;
6028 oflags = elf_elfheader (obfd)->e_flags;
6029
6030 if (iflags & ~EF_PPC64_ABI)
6031 {
6032 _bfd_error_handler
6033 /* xgettext:c-format */
6034 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6035 bfd_set_error (bfd_error_bad_value);
6036 return FALSE;
6037 }
6038 else if (iflags != oflags && iflags != 0)
6039 {
6040 _bfd_error_handler
6041 /* xgettext:c-format */
6042 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6043 ibfd, iflags, oflags);
6044 bfd_set_error (bfd_error_bad_value);
6045 return FALSE;
6046 }
6047
6048 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6049
6050 /* Merge Tag_compatibility attributes and any common GNU ones. */
6051 _bfd_elf_merge_object_attributes (ibfd, info);
6052
6053 return TRUE;
6054 }
6055
6056 static bfd_boolean
6057 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6058 {
6059 /* Print normal ELF private data. */
6060 _bfd_elf_print_private_bfd_data (abfd, ptr);
6061
6062 if (elf_elfheader (abfd)->e_flags != 0)
6063 {
6064 FILE *file = ptr;
6065
6066 fprintf (file, _("private flags = 0x%lx:"),
6067 elf_elfheader (abfd)->e_flags);
6068
6069 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6070 fprintf (file, _(" [abiv%ld]"),
6071 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6072 fputc ('\n', file);
6073 }
6074
6075 return TRUE;
6076 }
6077
6078 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6079 of the code entry point, and its section, which must be in the same
6080 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6081
6082 static bfd_vma
6083 opd_entry_value (asection *opd_sec,
6084 bfd_vma offset,
6085 asection **code_sec,
6086 bfd_vma *code_off,
6087 bfd_boolean in_code_sec)
6088 {
6089 bfd *opd_bfd = opd_sec->owner;
6090 Elf_Internal_Rela *relocs;
6091 Elf_Internal_Rela *lo, *hi, *look;
6092 bfd_vma val;
6093
6094 /* No relocs implies we are linking a --just-symbols object, or looking
6095 at a final linked executable with addr2line or somesuch. */
6096 if (opd_sec->reloc_count == 0)
6097 {
6098 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6099
6100 if (contents == NULL)
6101 {
6102 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6103 return (bfd_vma) -1;
6104 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6105 }
6106
6107 /* PR 17512: file: 64b9dfbb. */
6108 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6109 return (bfd_vma) -1;
6110
6111 val = bfd_get_64 (opd_bfd, contents + offset);
6112 if (code_sec != NULL)
6113 {
6114 asection *sec, *likely = NULL;
6115
6116 if (in_code_sec)
6117 {
6118 sec = *code_sec;
6119 if (sec->vma <= val
6120 && val < sec->vma + sec->size)
6121 likely = sec;
6122 else
6123 val = -1;
6124 }
6125 else
6126 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6127 if (sec->vma <= val
6128 && (sec->flags & SEC_LOAD) != 0
6129 && (sec->flags & SEC_ALLOC) != 0)
6130 likely = sec;
6131 if (likely != NULL)
6132 {
6133 *code_sec = likely;
6134 if (code_off != NULL)
6135 *code_off = val - likely->vma;
6136 }
6137 }
6138 return val;
6139 }
6140
6141 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6142
6143 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6144 if (relocs == NULL)
6145 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6146 /* PR 17512: file: df8e1fd6. */
6147 if (relocs == NULL)
6148 return (bfd_vma) -1;
6149
6150 /* Go find the opd reloc at the sym address. */
6151 lo = relocs;
6152 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6153 val = (bfd_vma) -1;
6154 while (lo < hi)
6155 {
6156 look = lo + (hi - lo) / 2;
6157 if (look->r_offset < offset)
6158 lo = look + 1;
6159 else if (look->r_offset > offset)
6160 hi = look;
6161 else
6162 {
6163 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6164
6165 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6166 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6167 {
6168 unsigned long symndx = ELF64_R_SYM (look->r_info);
6169 asection *sec = NULL;
6170
6171 if (symndx >= symtab_hdr->sh_info
6172 && elf_sym_hashes (opd_bfd) != NULL)
6173 {
6174 struct elf_link_hash_entry **sym_hashes;
6175 struct elf_link_hash_entry *rh;
6176
6177 sym_hashes = elf_sym_hashes (opd_bfd);
6178 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6179 if (rh != NULL)
6180 {
6181 rh = elf_follow_link (rh);
6182 if (rh->root.type != bfd_link_hash_defined
6183 && rh->root.type != bfd_link_hash_defweak)
6184 break;
6185 if (rh->root.u.def.section->owner == opd_bfd)
6186 {
6187 val = rh->root.u.def.value;
6188 sec = rh->root.u.def.section;
6189 }
6190 }
6191 }
6192
6193 if (sec == NULL)
6194 {
6195 Elf_Internal_Sym *sym;
6196
6197 if (symndx < symtab_hdr->sh_info)
6198 {
6199 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6200 if (sym == NULL)
6201 {
6202 size_t symcnt = symtab_hdr->sh_info;
6203 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6204 symcnt, 0,
6205 NULL, NULL, NULL);
6206 if (sym == NULL)
6207 break;
6208 symtab_hdr->contents = (bfd_byte *) sym;
6209 }
6210 sym += symndx;
6211 }
6212 else
6213 {
6214 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6215 1, symndx,
6216 NULL, NULL, NULL);
6217 if (sym == NULL)
6218 break;
6219 }
6220 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6221 if (sec == NULL)
6222 break;
6223 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6224 val = sym->st_value;
6225 }
6226
6227 val += look->r_addend;
6228 if (code_off != NULL)
6229 *code_off = val;
6230 if (code_sec != NULL)
6231 {
6232 if (in_code_sec && *code_sec != sec)
6233 return -1;
6234 else
6235 *code_sec = sec;
6236 }
6237 if (sec->output_section != NULL)
6238 val += sec->output_section->vma + sec->output_offset;
6239 }
6240 break;
6241 }
6242 }
6243
6244 return val;
6245 }
6246
6247 /* If the ELF symbol SYM might be a function in SEC, return the
6248 function size and set *CODE_OFF to the function's entry point,
6249 otherwise return zero. */
6250
6251 static bfd_size_type
6252 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6253 bfd_vma *code_off)
6254 {
6255 bfd_size_type size;
6256
6257 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6258 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6259 return 0;
6260
6261 size = 0;
6262 if (!(sym->flags & BSF_SYNTHETIC))
6263 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6264
6265 if (strcmp (sym->section->name, ".opd") == 0)
6266 {
6267 struct _opd_sec_data *opd = get_opd_info (sym->section);
6268 bfd_vma symval = sym->value;
6269
6270 if (opd != NULL
6271 && opd->adjust != NULL
6272 && elf_section_data (sym->section)->relocs != NULL)
6273 {
6274 /* opd_entry_value will use cached relocs that have been
6275 adjusted, but with raw symbols. That means both local
6276 and global symbols need adjusting. */
6277 long adjust = opd->adjust[OPD_NDX (symval)];
6278 if (adjust == -1)
6279 return 0;
6280 symval += adjust;
6281 }
6282
6283 if (opd_entry_value (sym->section, symval,
6284 &sec, code_off, TRUE) == (bfd_vma) -1)
6285 return 0;
6286 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6287 symbol. This size has nothing to do with the code size of the
6288 function, which is what we're supposed to return, but the
6289 code size isn't available without looking up the dot-sym.
6290 However, doing that would be a waste of time particularly
6291 since elf_find_function will look at the dot-sym anyway.
6292 Now, elf_find_function will keep the largest size of any
6293 function sym found at the code address of interest, so return
6294 1 here to avoid it incorrectly caching a larger function size
6295 for a small function. This does mean we return the wrong
6296 size for a new-ABI function of size 24, but all that does is
6297 disable caching for such functions. */
6298 if (size == 24)
6299 size = 1;
6300 }
6301 else
6302 {
6303 if (sym->section != sec)
6304 return 0;
6305 *code_off = sym->value;
6306 }
6307 if (size == 0)
6308 size = 1;
6309 return size;
6310 }
6311
6312 /* Return true if symbol is defined in a regular object file. */
6313
6314 static bfd_boolean
6315 is_static_defined (struct elf_link_hash_entry *h)
6316 {
6317 return ((h->root.type == bfd_link_hash_defined
6318 || h->root.type == bfd_link_hash_defweak)
6319 && h->root.u.def.section != NULL
6320 && h->root.u.def.section->output_section != NULL);
6321 }
6322
6323 /* If FDH is a function descriptor symbol, return the associated code
6324 entry symbol if it is defined. Return NULL otherwise. */
6325
6326 static struct ppc_link_hash_entry *
6327 defined_code_entry (struct ppc_link_hash_entry *fdh)
6328 {
6329 if (fdh->is_func_descriptor)
6330 {
6331 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6332 if (fh->elf.root.type == bfd_link_hash_defined
6333 || fh->elf.root.type == bfd_link_hash_defweak)
6334 return fh;
6335 }
6336 return NULL;
6337 }
6338
6339 /* If FH is a function code entry symbol, return the associated
6340 function descriptor symbol if it is defined. Return NULL otherwise. */
6341
6342 static struct ppc_link_hash_entry *
6343 defined_func_desc (struct ppc_link_hash_entry *fh)
6344 {
6345 if (fh->oh != NULL
6346 && fh->oh->is_func_descriptor)
6347 {
6348 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6349 if (fdh->elf.root.type == bfd_link_hash_defined
6350 || fdh->elf.root.type == bfd_link_hash_defweak)
6351 return fdh;
6352 }
6353 return NULL;
6354 }
6355
6356 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6357
6358 /* Garbage collect sections, after first dealing with dot-symbols. */
6359
6360 static bfd_boolean
6361 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6362 {
6363 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6364
6365 if (htab != NULL && htab->need_func_desc_adj)
6366 {
6367 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6368 htab->need_func_desc_adj = 0;
6369 }
6370 return bfd_elf_gc_sections (abfd, info);
6371 }
6372
6373 /* Mark all our entry sym sections, both opd and code section. */
6374
6375 static void
6376 ppc64_elf_gc_keep (struct bfd_link_info *info)
6377 {
6378 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6379 struct bfd_sym_chain *sym;
6380
6381 if (htab == NULL)
6382 return;
6383
6384 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6385 {
6386 struct ppc_link_hash_entry *eh, *fh;
6387 asection *sec;
6388
6389 eh = (struct ppc_link_hash_entry *)
6390 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6391 if (eh == NULL)
6392 continue;
6393 if (eh->elf.root.type != bfd_link_hash_defined
6394 && eh->elf.root.type != bfd_link_hash_defweak)
6395 continue;
6396
6397 fh = defined_code_entry (eh);
6398 if (fh != NULL)
6399 {
6400 sec = fh->elf.root.u.def.section;
6401 sec->flags |= SEC_KEEP;
6402 }
6403 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6404 && opd_entry_value (eh->elf.root.u.def.section,
6405 eh->elf.root.u.def.value,
6406 &sec, NULL, FALSE) != (bfd_vma) -1)
6407 sec->flags |= SEC_KEEP;
6408
6409 sec = eh->elf.root.u.def.section;
6410 sec->flags |= SEC_KEEP;
6411 }
6412 }
6413
6414 /* Mark sections containing dynamically referenced symbols. When
6415 building shared libraries, we must assume that any visible symbol is
6416 referenced. */
6417
6418 static bfd_boolean
6419 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6420 {
6421 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6422 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6423 struct ppc_link_hash_entry *fdh;
6424 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6425
6426 /* Dynamic linking info is on the func descriptor sym. */
6427 fdh = defined_func_desc (eh);
6428 if (fdh != NULL)
6429 eh = fdh;
6430
6431 if ((eh->elf.root.type == bfd_link_hash_defined
6432 || eh->elf.root.type == bfd_link_hash_defweak)
6433 && (eh->elf.ref_dynamic
6434 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6435 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6436 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6437 && (!bfd_link_executable (info)
6438 || info->gc_keep_exported
6439 || info->export_dynamic
6440 || (eh->elf.dynamic
6441 && d != NULL
6442 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6443 && (eh->elf.versioned >= versioned
6444 || !bfd_hide_sym_by_version (info->version_info,
6445 eh->elf.root.root.string)))))
6446 {
6447 asection *code_sec;
6448 struct ppc_link_hash_entry *fh;
6449
6450 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6451
6452 /* Function descriptor syms cause the associated
6453 function code sym section to be marked. */
6454 fh = defined_code_entry (eh);
6455 if (fh != NULL)
6456 {
6457 code_sec = fh->elf.root.u.def.section;
6458 code_sec->flags |= SEC_KEEP;
6459 }
6460 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6461 && opd_entry_value (eh->elf.root.u.def.section,
6462 eh->elf.root.u.def.value,
6463 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6464 code_sec->flags |= SEC_KEEP;
6465 }
6466
6467 return TRUE;
6468 }
6469
6470 /* Return the section that should be marked against GC for a given
6471 relocation. */
6472
6473 static asection *
6474 ppc64_elf_gc_mark_hook (asection *sec,
6475 struct bfd_link_info *info,
6476 Elf_Internal_Rela *rel,
6477 struct elf_link_hash_entry *h,
6478 Elf_Internal_Sym *sym)
6479 {
6480 asection *rsec;
6481
6482 /* Syms return NULL if we're marking .opd, so we avoid marking all
6483 function sections, as all functions are referenced in .opd. */
6484 rsec = NULL;
6485 if (get_opd_info (sec) != NULL)
6486 return rsec;
6487
6488 if (h != NULL)
6489 {
6490 enum elf_ppc64_reloc_type r_type;
6491 struct ppc_link_hash_entry *eh, *fh, *fdh;
6492
6493 r_type = ELF64_R_TYPE (rel->r_info);
6494 switch (r_type)
6495 {
6496 case R_PPC64_GNU_VTINHERIT:
6497 case R_PPC64_GNU_VTENTRY:
6498 break;
6499
6500 default:
6501 switch (h->root.type)
6502 {
6503 case bfd_link_hash_defined:
6504 case bfd_link_hash_defweak:
6505 eh = (struct ppc_link_hash_entry *) h;
6506 fdh = defined_func_desc (eh);
6507 if (fdh != NULL)
6508 {
6509 /* -mcall-aixdesc code references the dot-symbol on
6510 a call reloc. Mark the function descriptor too
6511 against garbage collection. */
6512 fdh->elf.mark = 1;
6513 if (fdh->elf.u.weakdef != NULL)
6514 fdh->elf.u.weakdef->mark = 1;
6515 eh = fdh;
6516 }
6517
6518 /* Function descriptor syms cause the associated
6519 function code sym section to be marked. */
6520 fh = defined_code_entry (eh);
6521 if (fh != NULL)
6522 {
6523 /* They also mark their opd section. */
6524 eh->elf.root.u.def.section->gc_mark = 1;
6525
6526 rsec = fh->elf.root.u.def.section;
6527 }
6528 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6529 && opd_entry_value (eh->elf.root.u.def.section,
6530 eh->elf.root.u.def.value,
6531 &rsec, NULL, FALSE) != (bfd_vma) -1)
6532 eh->elf.root.u.def.section->gc_mark = 1;
6533 else
6534 rsec = h->root.u.def.section;
6535 break;
6536
6537 case bfd_link_hash_common:
6538 rsec = h->root.u.c.p->section;
6539 break;
6540
6541 default:
6542 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6543 }
6544 }
6545 }
6546 else
6547 {
6548 struct _opd_sec_data *opd;
6549
6550 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6551 opd = get_opd_info (rsec);
6552 if (opd != NULL && opd->func_sec != NULL)
6553 {
6554 rsec->gc_mark = 1;
6555
6556 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6557 }
6558 }
6559
6560 return rsec;
6561 }
6562
6563 /* Update the .got, .plt. and dynamic reloc reference counts for the
6564 section being removed. */
6565
6566 static bfd_boolean
6567 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6568 asection *sec, const Elf_Internal_Rela *relocs)
6569 {
6570 struct ppc_link_hash_table *htab;
6571 Elf_Internal_Shdr *symtab_hdr;
6572 struct elf_link_hash_entry **sym_hashes;
6573 struct got_entry **local_got_ents;
6574 const Elf_Internal_Rela *rel, *relend;
6575
6576 if (bfd_link_relocatable (info))
6577 return TRUE;
6578
6579 if ((sec->flags & SEC_ALLOC) == 0)
6580 return TRUE;
6581
6582 elf_section_data (sec)->local_dynrel = NULL;
6583
6584 htab = ppc_hash_table (info);
6585 if (htab == NULL)
6586 return FALSE;
6587
6588 symtab_hdr = &elf_symtab_hdr (abfd);
6589 sym_hashes = elf_sym_hashes (abfd);
6590 local_got_ents = elf_local_got_ents (abfd);
6591
6592 relend = relocs + sec->reloc_count;
6593 for (rel = relocs; rel < relend; rel++)
6594 {
6595 unsigned long r_symndx;
6596 enum elf_ppc64_reloc_type r_type;
6597 struct elf_link_hash_entry *h = NULL;
6598 struct plt_entry **plt_list;
6599 unsigned char tls_type = 0;
6600
6601 r_symndx = ELF64_R_SYM (rel->r_info);
6602 r_type = ELF64_R_TYPE (rel->r_info);
6603 if (r_symndx >= symtab_hdr->sh_info)
6604 {
6605 struct ppc_link_hash_entry *eh;
6606 struct elf_dyn_relocs **pp;
6607 struct elf_dyn_relocs *p;
6608
6609 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6610 h = elf_follow_link (h);
6611 eh = (struct ppc_link_hash_entry *) h;
6612
6613 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6614 if (p->sec == sec)
6615 {
6616 /* Everything must go for SEC. */
6617 *pp = p->next;
6618 break;
6619 }
6620 }
6621
6622 switch (r_type)
6623 {
6624 case R_PPC64_GOT_TLSLD16:
6625 case R_PPC64_GOT_TLSLD16_LO:
6626 case R_PPC64_GOT_TLSLD16_HI:
6627 case R_PPC64_GOT_TLSLD16_HA:
6628 tls_type = TLS_TLS | TLS_LD;
6629 goto dogot;
6630
6631 case R_PPC64_GOT_TLSGD16:
6632 case R_PPC64_GOT_TLSGD16_LO:
6633 case R_PPC64_GOT_TLSGD16_HI:
6634 case R_PPC64_GOT_TLSGD16_HA:
6635 tls_type = TLS_TLS | TLS_GD;
6636 goto dogot;
6637
6638 case R_PPC64_GOT_TPREL16_DS:
6639 case R_PPC64_GOT_TPREL16_LO_DS:
6640 case R_PPC64_GOT_TPREL16_HI:
6641 case R_PPC64_GOT_TPREL16_HA:
6642 tls_type = TLS_TLS | TLS_TPREL;
6643 goto dogot;
6644
6645 case R_PPC64_GOT_DTPREL16_DS:
6646 case R_PPC64_GOT_DTPREL16_LO_DS:
6647 case R_PPC64_GOT_DTPREL16_HI:
6648 case R_PPC64_GOT_DTPREL16_HA:
6649 tls_type = TLS_TLS | TLS_DTPREL;
6650 goto dogot;
6651
6652 case R_PPC64_GOT16:
6653 case R_PPC64_GOT16_DS:
6654 case R_PPC64_GOT16_HA:
6655 case R_PPC64_GOT16_HI:
6656 case R_PPC64_GOT16_LO:
6657 case R_PPC64_GOT16_LO_DS:
6658 dogot:
6659 {
6660 struct got_entry *ent;
6661
6662 if (h != NULL)
6663 ent = h->got.glist;
6664 else
6665 ent = local_got_ents[r_symndx];
6666
6667 for (; ent != NULL; ent = ent->next)
6668 if (ent->addend == rel->r_addend
6669 && ent->owner == abfd
6670 && ent->tls_type == tls_type)
6671 break;
6672 if (ent == NULL)
6673 abort ();
6674 if (ent->got.refcount > 0)
6675 ent->got.refcount -= 1;
6676 }
6677 break;
6678
6679 case R_PPC64_PLT16_HA:
6680 case R_PPC64_PLT16_HI:
6681 case R_PPC64_PLT16_LO:
6682 case R_PPC64_PLT32:
6683 case R_PPC64_PLT64:
6684 case R_PPC64_REL14:
6685 case R_PPC64_REL14_BRNTAKEN:
6686 case R_PPC64_REL14_BRTAKEN:
6687 case R_PPC64_REL24:
6688 plt_list = NULL;
6689 if (h != NULL)
6690 plt_list = &h->plt.plist;
6691 else if (local_got_ents != NULL)
6692 {
6693 struct plt_entry **local_plt = (struct plt_entry **)
6694 (local_got_ents + symtab_hdr->sh_info);
6695 unsigned char *local_got_tls_masks = (unsigned char *)
6696 (local_plt + symtab_hdr->sh_info);
6697 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6698 plt_list = local_plt + r_symndx;
6699 }
6700 if (plt_list)
6701 {
6702 struct plt_entry *ent;
6703
6704 for (ent = *plt_list; ent != NULL; ent = ent->next)
6705 if (ent->addend == rel->r_addend)
6706 break;
6707 if (ent != NULL && ent->plt.refcount > 0)
6708 ent->plt.refcount -= 1;
6709 }
6710 break;
6711
6712 default:
6713 break;
6714 }
6715 }
6716 return TRUE;
6717 }
6718
6719 /* The maximum size of .sfpr. */
6720 #define SFPR_MAX (218*4)
6721
6722 struct sfpr_def_parms
6723 {
6724 const char name[12];
6725 unsigned char lo, hi;
6726 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6727 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6728 };
6729
6730 /* Auto-generate _save*, _rest* functions in .sfpr.
6731 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6732 instead. */
6733
6734 static bfd_boolean
6735 sfpr_define (struct bfd_link_info *info,
6736 const struct sfpr_def_parms *parm,
6737 asection *stub_sec)
6738 {
6739 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6740 unsigned int i;
6741 size_t len = strlen (parm->name);
6742 bfd_boolean writing = FALSE;
6743 char sym[16];
6744
6745 if (htab == NULL)
6746 return FALSE;
6747
6748 memcpy (sym, parm->name, len);
6749 sym[len + 2] = 0;
6750
6751 for (i = parm->lo; i <= parm->hi; i++)
6752 {
6753 struct ppc_link_hash_entry *h;
6754
6755 sym[len + 0] = i / 10 + '0';
6756 sym[len + 1] = i % 10 + '0';
6757 h = (struct ppc_link_hash_entry *)
6758 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6759 if (stub_sec != NULL)
6760 {
6761 if (h != NULL
6762 && h->elf.root.type == bfd_link_hash_defined
6763 && h->elf.root.u.def.section == htab->sfpr)
6764 {
6765 struct elf_link_hash_entry *s;
6766 char buf[32];
6767 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6768 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6769 if (s == NULL)
6770 return FALSE;
6771 if (s->root.type == bfd_link_hash_new
6772 || (s->root.type = bfd_link_hash_defined
6773 && s->root.u.def.section == stub_sec))
6774 {
6775 s->root.type = bfd_link_hash_defined;
6776 s->root.u.def.section = stub_sec;
6777 s->root.u.def.value = (stub_sec->size
6778 + h->elf.root.u.def.value);
6779 s->ref_regular = 1;
6780 s->def_regular = 1;
6781 s->ref_regular_nonweak = 1;
6782 s->forced_local = 1;
6783 s->non_elf = 0;
6784 s->root.linker_def = 1;
6785 }
6786 }
6787 continue;
6788 }
6789 if (h != NULL)
6790 {
6791 h->save_res = 1;
6792 if (!h->elf.def_regular)
6793 {
6794 h->elf.root.type = bfd_link_hash_defined;
6795 h->elf.root.u.def.section = htab->sfpr;
6796 h->elf.root.u.def.value = htab->sfpr->size;
6797 h->elf.type = STT_FUNC;
6798 h->elf.def_regular = 1;
6799 h->elf.non_elf = 0;
6800 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6801 writing = TRUE;
6802 if (htab->sfpr->contents == NULL)
6803 {
6804 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6805 if (htab->sfpr->contents == NULL)
6806 return FALSE;
6807 }
6808 }
6809 }
6810 if (writing)
6811 {
6812 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6813 if (i != parm->hi)
6814 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6815 else
6816 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6817 htab->sfpr->size = p - htab->sfpr->contents;
6818 }
6819 }
6820
6821 return TRUE;
6822 }
6823
6824 static bfd_byte *
6825 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6826 {
6827 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6828 return p + 4;
6829 }
6830
6831 static bfd_byte *
6832 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6833 {
6834 p = savegpr0 (abfd, p, r);
6835 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6836 p = p + 4;
6837 bfd_put_32 (abfd, BLR, p);
6838 return p + 4;
6839 }
6840
6841 static bfd_byte *
6842 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6843 {
6844 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6845 return p + 4;
6846 }
6847
6848 static bfd_byte *
6849 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6850 {
6851 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6852 p = p + 4;
6853 p = restgpr0 (abfd, p, r);
6854 bfd_put_32 (abfd, MTLR_R0, p);
6855 p = p + 4;
6856 if (r == 29)
6857 {
6858 p = restgpr0 (abfd, p, 30);
6859 p = restgpr0 (abfd, p, 31);
6860 }
6861 bfd_put_32 (abfd, BLR, p);
6862 return p + 4;
6863 }
6864
6865 static bfd_byte *
6866 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6867 {
6868 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6869 return p + 4;
6870 }
6871
6872 static bfd_byte *
6873 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6874 {
6875 p = savegpr1 (abfd, p, r);
6876 bfd_put_32 (abfd, BLR, p);
6877 return p + 4;
6878 }
6879
6880 static bfd_byte *
6881 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6882 {
6883 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6884 return p + 4;
6885 }
6886
6887 static bfd_byte *
6888 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6889 {
6890 p = restgpr1 (abfd, p, r);
6891 bfd_put_32 (abfd, BLR, p);
6892 return p + 4;
6893 }
6894
6895 static bfd_byte *
6896 savefpr (bfd *abfd, bfd_byte *p, int r)
6897 {
6898 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6899 return p + 4;
6900 }
6901
6902 static bfd_byte *
6903 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6904 {
6905 p = savefpr (abfd, p, r);
6906 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6907 p = p + 4;
6908 bfd_put_32 (abfd, BLR, p);
6909 return p + 4;
6910 }
6911
6912 static bfd_byte *
6913 restfpr (bfd *abfd, bfd_byte *p, int r)
6914 {
6915 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6916 return p + 4;
6917 }
6918
6919 static bfd_byte *
6920 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6921 {
6922 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6923 p = p + 4;
6924 p = restfpr (abfd, p, r);
6925 bfd_put_32 (abfd, MTLR_R0, p);
6926 p = p + 4;
6927 if (r == 29)
6928 {
6929 p = restfpr (abfd, p, 30);
6930 p = restfpr (abfd, p, 31);
6931 }
6932 bfd_put_32 (abfd, BLR, p);
6933 return p + 4;
6934 }
6935
6936 static bfd_byte *
6937 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6938 {
6939 p = savefpr (abfd, p, r);
6940 bfd_put_32 (abfd, BLR, p);
6941 return p + 4;
6942 }
6943
6944 static bfd_byte *
6945 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6946 {
6947 p = restfpr (abfd, p, r);
6948 bfd_put_32 (abfd, BLR, p);
6949 return p + 4;
6950 }
6951
6952 static bfd_byte *
6953 savevr (bfd *abfd, bfd_byte *p, int r)
6954 {
6955 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6956 p = p + 4;
6957 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6958 return p + 4;
6959 }
6960
6961 static bfd_byte *
6962 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6963 {
6964 p = savevr (abfd, p, r);
6965 bfd_put_32 (abfd, BLR, p);
6966 return p + 4;
6967 }
6968
6969 static bfd_byte *
6970 restvr (bfd *abfd, bfd_byte *p, int r)
6971 {
6972 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6973 p = p + 4;
6974 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6975 return p + 4;
6976 }
6977
6978 static bfd_byte *
6979 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6980 {
6981 p = restvr (abfd, p, r);
6982 bfd_put_32 (abfd, BLR, p);
6983 return p + 4;
6984 }
6985
6986 /* Called via elf_link_hash_traverse to transfer dynamic linking
6987 information on function code symbol entries to their corresponding
6988 function descriptor symbol entries. */
6989
6990 static bfd_boolean
6991 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6992 {
6993 struct bfd_link_info *info;
6994 struct ppc_link_hash_table *htab;
6995 struct ppc_link_hash_entry *fh;
6996 struct ppc_link_hash_entry *fdh;
6997 bfd_boolean force_local;
6998
6999 fh = (struct ppc_link_hash_entry *) h;
7000 if (fh->elf.root.type == bfd_link_hash_indirect)
7001 return TRUE;
7002
7003 if (!fh->is_func)
7004 return TRUE;
7005
7006 if (fh->elf.root.root.string[0] != '.'
7007 || fh->elf.root.root.string[1] == '\0')
7008 return TRUE;
7009
7010 info = inf;
7011 htab = ppc_hash_table (info);
7012 if (htab == NULL)
7013 return FALSE;
7014
7015 /* Find the corresponding function descriptor symbol. */
7016 fdh = lookup_fdh (fh, htab);
7017
7018 /* Resolve undefined references to dot-symbols as the value
7019 in the function descriptor, if we have one in a regular object.
7020 This is to satisfy cases like ".quad .foo". Calls to functions
7021 in dynamic objects are handled elsewhere. */
7022 if ((fh->elf.root.type == bfd_link_hash_undefined
7023 || fh->elf.root.type == bfd_link_hash_undefweak)
7024 && (fdh->elf.root.type == bfd_link_hash_defined
7025 || fdh->elf.root.type == bfd_link_hash_defweak)
7026 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7027 && opd_entry_value (fdh->elf.root.u.def.section,
7028 fdh->elf.root.u.def.value,
7029 &fh->elf.root.u.def.section,
7030 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7031 {
7032 fh->elf.root.type = fdh->elf.root.type;
7033 fh->elf.forced_local = 1;
7034 fh->elf.def_regular = fdh->elf.def_regular;
7035 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7036 }
7037
7038 if (!fh->elf.dynamic)
7039 {
7040 struct plt_entry *ent;
7041
7042 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7043 if (ent->plt.refcount > 0)
7044 break;
7045 if (ent == NULL)
7046 return TRUE;
7047 }
7048
7049 /* Create a descriptor as undefined if necessary. */
7050 if (fdh == NULL
7051 && !bfd_link_executable (info)
7052 && (fh->elf.root.type == bfd_link_hash_undefined
7053 || fh->elf.root.type == bfd_link_hash_undefweak))
7054 {
7055 fdh = make_fdh (info, fh);
7056 if (fdh == NULL)
7057 return FALSE;
7058 }
7059
7060 /* We can't support overriding of symbols on a fake descriptor. */
7061 if (fdh != NULL
7062 && fdh->fake
7063 && (fh->elf.root.type == bfd_link_hash_defined
7064 || fh->elf.root.type == bfd_link_hash_defweak))
7065 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7066
7067 /* Transfer dynamic linking information to the function descriptor. */
7068 if (fdh != NULL)
7069 {
7070 fdh->elf.ref_regular |= fh->elf.ref_regular;
7071 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7072 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7073 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7074 fdh->elf.dynamic |= fh->elf.dynamic;
7075 fdh->elf.needs_plt |= (fh->elf.needs_plt
7076 || fh->elf.type == STT_FUNC
7077 || fh->elf.type == STT_GNU_IFUNC);
7078 move_plt_plist (fh, fdh);
7079
7080 if (!fdh->elf.forced_local
7081 && fh->elf.dynindx != -1)
7082 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7083 return FALSE;
7084 }
7085
7086 /* Now that the info is on the function descriptor, clear the
7087 function code sym info. Any function code syms for which we
7088 don't have a definition in a regular file, we force local.
7089 This prevents a shared library from exporting syms that have
7090 been imported from another library. Function code syms that
7091 are really in the library we must leave global to prevent the
7092 linker dragging in a definition from a static library. */
7093 force_local = (!fh->elf.def_regular
7094 || fdh == NULL
7095 || !fdh->elf.def_regular
7096 || fdh->elf.forced_local);
7097 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7098
7099 return TRUE;
7100 }
7101
7102 static const struct sfpr_def_parms save_res_funcs[] =
7103 {
7104 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7105 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7106 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7107 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7108 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7109 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7110 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7111 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7112 { "._savef", 14, 31, savefpr, savefpr1_tail },
7113 { "._restf", 14, 31, restfpr, restfpr1_tail },
7114 { "_savevr_", 20, 31, savevr, savevr_tail },
7115 { "_restvr_", 20, 31, restvr, restvr_tail }
7116 };
7117
7118 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7119 this hook to a) provide some gcc support functions, and b) transfer
7120 dynamic linking information gathered so far on function code symbol
7121 entries, to their corresponding function descriptor symbol entries. */
7122
7123 static bfd_boolean
7124 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7125 struct bfd_link_info *info)
7126 {
7127 struct ppc_link_hash_table *htab;
7128
7129 htab = ppc_hash_table (info);
7130 if (htab == NULL)
7131 return FALSE;
7132
7133 /* Provide any missing _save* and _rest* functions. */
7134 if (htab->sfpr != NULL)
7135 {
7136 unsigned int i;
7137
7138 htab->sfpr->size = 0;
7139 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7140 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7141 return FALSE;
7142 if (htab->sfpr->size == 0)
7143 htab->sfpr->flags |= SEC_EXCLUDE;
7144 }
7145
7146 if (bfd_link_relocatable (info))
7147 return TRUE;
7148
7149 if (htab->elf.hgot != NULL)
7150 {
7151 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7152 /* Make .TOC. defined so as to prevent it being made dynamic.
7153 The wrong value here is fixed later in ppc64_elf_set_toc. */
7154 if (!htab->elf.hgot->def_regular
7155 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7156 {
7157 htab->elf.hgot->root.type = bfd_link_hash_defined;
7158 htab->elf.hgot->root.u.def.value = 0;
7159 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7160 htab->elf.hgot->def_regular = 1;
7161 htab->elf.hgot->root.linker_def = 1;
7162 }
7163 htab->elf.hgot->type = STT_OBJECT;
7164 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7165 | STV_HIDDEN);
7166 }
7167
7168 if (htab->need_func_desc_adj)
7169 {
7170 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7171 htab->need_func_desc_adj = 0;
7172 }
7173
7174 return TRUE;
7175 }
7176
7177 /* Return true if we have dynamic relocs against H that apply to
7178 read-only sections. */
7179
7180 static bfd_boolean
7181 readonly_dynrelocs (struct elf_link_hash_entry *h)
7182 {
7183 struct ppc_link_hash_entry *eh;
7184 struct elf_dyn_relocs *p;
7185
7186 eh = (struct ppc_link_hash_entry *) h;
7187 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7188 {
7189 asection *s = p->sec->output_section;
7190
7191 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7192 return TRUE;
7193 }
7194 return FALSE;
7195 }
7196
7197 /* Return true if we have dynamic relocs against H or any of its weak
7198 aliases, that apply to read-only sections. */
7199
7200 static bfd_boolean
7201 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7202 {
7203 struct ppc_link_hash_entry *eh;
7204
7205 eh = (struct ppc_link_hash_entry *) h;
7206 do
7207 {
7208 if (readonly_dynrelocs (&eh->elf))
7209 return TRUE;
7210 eh = eh->weakref;
7211 } while (eh != NULL && &eh->elf != h);
7212
7213 return FALSE;
7214 }
7215
7216 /* Return whether EH has pc-relative dynamic relocs. */
7217
7218 static bfd_boolean
7219 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7220 {
7221 struct elf_dyn_relocs *p;
7222
7223 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7224 if (p->pc_count != 0)
7225 return TRUE;
7226 return FALSE;
7227 }
7228
7229 /* Return true if a global entry stub will be created for H. Valid
7230 for ELFv2 before plt entries have been allocated. */
7231
7232 static bfd_boolean
7233 global_entry_stub (struct elf_link_hash_entry *h)
7234 {
7235 struct plt_entry *pent;
7236
7237 if (!h->pointer_equality_needed
7238 || h->def_regular)
7239 return FALSE;
7240
7241 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7242 if (pent->plt.refcount > 0
7243 && pent->addend == 0)
7244 return TRUE;
7245
7246 return FALSE;
7247 }
7248
7249 /* Adjust a symbol defined by a dynamic object and referenced by a
7250 regular object. The current definition is in some section of the
7251 dynamic object, but we're not including those sections. We have to
7252 change the definition to something the rest of the link can
7253 understand. */
7254
7255 static bfd_boolean
7256 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7257 struct elf_link_hash_entry *h)
7258 {
7259 struct ppc_link_hash_table *htab;
7260 asection *s, *srel;
7261
7262 htab = ppc_hash_table (info);
7263 if (htab == NULL)
7264 return FALSE;
7265
7266 /* Deal with function syms. */
7267 if (h->type == STT_FUNC
7268 || h->type == STT_GNU_IFUNC
7269 || h->needs_plt)
7270 {
7271 /* Clear procedure linkage table information for any symbol that
7272 won't need a .plt entry. */
7273 struct plt_entry *ent;
7274 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7275 if (ent->plt.refcount > 0)
7276 break;
7277 if (ent == NULL
7278 || (h->type != STT_GNU_IFUNC
7279 && (SYMBOL_CALLS_LOCAL (info, h)
7280 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7281 && h->root.type == bfd_link_hash_undefweak)))
7282 || ((struct ppc_link_hash_entry *) h)->save_res)
7283 {
7284 h->plt.plist = NULL;
7285 h->needs_plt = 0;
7286 h->pointer_equality_needed = 0;
7287 }
7288 else if (abiversion (info->output_bfd) >= 2)
7289 {
7290 /* Taking a function's address in a read/write section
7291 doesn't require us to define the function symbol in the
7292 executable on a global entry stub. A dynamic reloc can
7293 be used instead. The reason we prefer a few more dynamic
7294 relocs is that calling via a global entry stub costs a
7295 few more instructions, and pointer_equality_needed causes
7296 extra work in ld.so when resolving these symbols. */
7297 if (global_entry_stub (h)
7298 && !alias_readonly_dynrelocs (h))
7299 {
7300 h->pointer_equality_needed = 0;
7301 /* After adjust_dynamic_symbol, non_got_ref set in
7302 the non-pic case means that dyn_relocs for this
7303 symbol should be discarded. */
7304 h->non_got_ref = 0;
7305 }
7306
7307 /* If making a plt entry, then we don't need copy relocs. */
7308 return TRUE;
7309 }
7310 }
7311 else
7312 h->plt.plist = NULL;
7313
7314 /* If this is a weak symbol, and there is a real definition, the
7315 processor independent code will have arranged for us to see the
7316 real definition first, and we can just use the same value. */
7317 if (h->u.weakdef != NULL)
7318 {
7319 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7320 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7321 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7322 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7323 if (ELIMINATE_COPY_RELOCS)
7324 h->non_got_ref = h->u.weakdef->non_got_ref;
7325 return TRUE;
7326 }
7327
7328 /* If we are creating a shared library, we must presume that the
7329 only references to the symbol are via the global offset table.
7330 For such cases we need not do anything here; the relocations will
7331 be handled correctly by relocate_section. */
7332 if (bfd_link_pic (info))
7333 return TRUE;
7334
7335 /* If there are no references to this symbol that do not use the
7336 GOT, we don't need to generate a copy reloc. */
7337 if (!h->non_got_ref)
7338 return TRUE;
7339
7340 /* Don't generate a copy reloc for symbols defined in the executable. */
7341 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7342
7343 /* If -z nocopyreloc was given, don't generate them either. */
7344 || info->nocopyreloc
7345
7346 /* If we didn't find any dynamic relocs in read-only sections, then
7347 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7348 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7349
7350 /* Protected variables do not work with .dynbss. The copy in
7351 .dynbss won't be used by the shared library with the protected
7352 definition for the variable. Text relocations are preferable
7353 to an incorrect program. */
7354 || h->protected_def)
7355 {
7356 h->non_got_ref = 0;
7357 return TRUE;
7358 }
7359
7360 if (h->plt.plist != NULL)
7361 {
7362 /* We should never get here, but unfortunately there are versions
7363 of gcc out there that improperly (for this ABI) put initialized
7364 function pointers, vtable refs and suchlike in read-only
7365 sections. Allow them to proceed, but warn that this might
7366 break at runtime. */
7367 info->callbacks->einfo
7368 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7369 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7370 h->root.root.string);
7371 }
7372
7373 /* This is a reference to a symbol defined by a dynamic object which
7374 is not a function. */
7375
7376 /* We must allocate the symbol in our .dynbss section, which will
7377 become part of the .bss section of the executable. There will be
7378 an entry for this symbol in the .dynsym section. The dynamic
7379 object will contain position independent code, so all references
7380 from the dynamic object to this symbol will go through the global
7381 offset table. The dynamic linker will use the .dynsym entry to
7382 determine the address it must put in the global offset table, so
7383 both the dynamic object and the regular object will refer to the
7384 same memory location for the variable. */
7385
7386 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7387 to copy the initial value out of the dynamic object and into the
7388 runtime process image. We need to remember the offset into the
7389 .rela.bss section we are going to use. */
7390 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7391 {
7392 s = htab->elf.sdynrelro;
7393 srel = htab->elf.sreldynrelro;
7394 }
7395 else
7396 {
7397 s = htab->elf.sdynbss;
7398 srel = htab->elf.srelbss;
7399 }
7400 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7401 {
7402 srel->size += sizeof (Elf64_External_Rela);
7403 h->needs_copy = 1;
7404 }
7405
7406 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7407 }
7408
7409 /* If given a function descriptor symbol, hide both the function code
7410 sym and the descriptor. */
7411 static void
7412 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7413 struct elf_link_hash_entry *h,
7414 bfd_boolean force_local)
7415 {
7416 struct ppc_link_hash_entry *eh;
7417 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7418
7419 eh = (struct ppc_link_hash_entry *) h;
7420 if (eh->is_func_descriptor)
7421 {
7422 struct ppc_link_hash_entry *fh = eh->oh;
7423
7424 if (fh == NULL)
7425 {
7426 const char *p, *q;
7427 struct elf_link_hash_table *htab = elf_hash_table (info);
7428 char save;
7429
7430 /* We aren't supposed to use alloca in BFD because on
7431 systems which do not have alloca the version in libiberty
7432 calls xmalloc, which might cause the program to crash
7433 when it runs out of memory. This function doesn't have a
7434 return status, so there's no way to gracefully return an
7435 error. So cheat. We know that string[-1] can be safely
7436 accessed; It's either a string in an ELF string table,
7437 or allocated in an objalloc structure. */
7438
7439 p = eh->elf.root.root.string - 1;
7440 save = *p;
7441 *(char *) p = '.';
7442 fh = (struct ppc_link_hash_entry *)
7443 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7444 *(char *) p = save;
7445
7446 /* Unfortunately, if it so happens that the string we were
7447 looking for was allocated immediately before this string,
7448 then we overwrote the string terminator. That's the only
7449 reason the lookup should fail. */
7450 if (fh == NULL)
7451 {
7452 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7453 while (q >= eh->elf.root.root.string && *q == *p)
7454 --q, --p;
7455 if (q < eh->elf.root.root.string && *p == '.')
7456 fh = (struct ppc_link_hash_entry *)
7457 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7458 }
7459 if (fh != NULL)
7460 {
7461 eh->oh = fh;
7462 fh->oh = eh;
7463 }
7464 }
7465 if (fh != NULL)
7466 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7467 }
7468 }
7469
7470 static bfd_boolean
7471 get_sym_h (struct elf_link_hash_entry **hp,
7472 Elf_Internal_Sym **symp,
7473 asection **symsecp,
7474 unsigned char **tls_maskp,
7475 Elf_Internal_Sym **locsymsp,
7476 unsigned long r_symndx,
7477 bfd *ibfd)
7478 {
7479 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7480
7481 if (r_symndx >= symtab_hdr->sh_info)
7482 {
7483 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7484 struct elf_link_hash_entry *h;
7485
7486 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7487 h = elf_follow_link (h);
7488
7489 if (hp != NULL)
7490 *hp = h;
7491
7492 if (symp != NULL)
7493 *symp = NULL;
7494
7495 if (symsecp != NULL)
7496 {
7497 asection *symsec = NULL;
7498 if (h->root.type == bfd_link_hash_defined
7499 || h->root.type == bfd_link_hash_defweak)
7500 symsec = h->root.u.def.section;
7501 *symsecp = symsec;
7502 }
7503
7504 if (tls_maskp != NULL)
7505 {
7506 struct ppc_link_hash_entry *eh;
7507
7508 eh = (struct ppc_link_hash_entry *) h;
7509 *tls_maskp = &eh->tls_mask;
7510 }
7511 }
7512 else
7513 {
7514 Elf_Internal_Sym *sym;
7515 Elf_Internal_Sym *locsyms = *locsymsp;
7516
7517 if (locsyms == NULL)
7518 {
7519 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7520 if (locsyms == NULL)
7521 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7522 symtab_hdr->sh_info,
7523 0, NULL, NULL, NULL);
7524 if (locsyms == NULL)
7525 return FALSE;
7526 *locsymsp = locsyms;
7527 }
7528 sym = locsyms + r_symndx;
7529
7530 if (hp != NULL)
7531 *hp = NULL;
7532
7533 if (symp != NULL)
7534 *symp = sym;
7535
7536 if (symsecp != NULL)
7537 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7538
7539 if (tls_maskp != NULL)
7540 {
7541 struct got_entry **lgot_ents;
7542 unsigned char *tls_mask;
7543
7544 tls_mask = NULL;
7545 lgot_ents = elf_local_got_ents (ibfd);
7546 if (lgot_ents != NULL)
7547 {
7548 struct plt_entry **local_plt = (struct plt_entry **)
7549 (lgot_ents + symtab_hdr->sh_info);
7550 unsigned char *lgot_masks = (unsigned char *)
7551 (local_plt + symtab_hdr->sh_info);
7552 tls_mask = &lgot_masks[r_symndx];
7553 }
7554 *tls_maskp = tls_mask;
7555 }
7556 }
7557 return TRUE;
7558 }
7559
7560 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7561 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7562 type suitable for optimization, and 1 otherwise. */
7563
7564 static int
7565 get_tls_mask (unsigned char **tls_maskp,
7566 unsigned long *toc_symndx,
7567 bfd_vma *toc_addend,
7568 Elf_Internal_Sym **locsymsp,
7569 const Elf_Internal_Rela *rel,
7570 bfd *ibfd)
7571 {
7572 unsigned long r_symndx;
7573 int next_r;
7574 struct elf_link_hash_entry *h;
7575 Elf_Internal_Sym *sym;
7576 asection *sec;
7577 bfd_vma off;
7578
7579 r_symndx = ELF64_R_SYM (rel->r_info);
7580 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7581 return 0;
7582
7583 if ((*tls_maskp != NULL && **tls_maskp != 0)
7584 || sec == NULL
7585 || ppc64_elf_section_data (sec) == NULL
7586 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7587 return 1;
7588
7589 /* Look inside a TOC section too. */
7590 if (h != NULL)
7591 {
7592 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7593 off = h->root.u.def.value;
7594 }
7595 else
7596 off = sym->st_value;
7597 off += rel->r_addend;
7598 BFD_ASSERT (off % 8 == 0);
7599 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7600 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7601 if (toc_symndx != NULL)
7602 *toc_symndx = r_symndx;
7603 if (toc_addend != NULL)
7604 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7605 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7606 return 0;
7607 if ((h == NULL || is_static_defined (h))
7608 && (next_r == -1 || next_r == -2))
7609 return 1 - next_r;
7610 return 1;
7611 }
7612
7613 /* Find (or create) an entry in the tocsave hash table. */
7614
7615 static struct tocsave_entry *
7616 tocsave_find (struct ppc_link_hash_table *htab,
7617 enum insert_option insert,
7618 Elf_Internal_Sym **local_syms,
7619 const Elf_Internal_Rela *irela,
7620 bfd *ibfd)
7621 {
7622 unsigned long r_indx;
7623 struct elf_link_hash_entry *h;
7624 Elf_Internal_Sym *sym;
7625 struct tocsave_entry ent, *p;
7626 hashval_t hash;
7627 struct tocsave_entry **slot;
7628
7629 r_indx = ELF64_R_SYM (irela->r_info);
7630 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7631 return NULL;
7632 if (ent.sec == NULL || ent.sec->output_section == NULL)
7633 {
7634 _bfd_error_handler
7635 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7636 return NULL;
7637 }
7638
7639 if (h != NULL)
7640 ent.offset = h->root.u.def.value;
7641 else
7642 ent.offset = sym->st_value;
7643 ent.offset += irela->r_addend;
7644
7645 hash = tocsave_htab_hash (&ent);
7646 slot = ((struct tocsave_entry **)
7647 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7648 if (slot == NULL)
7649 return NULL;
7650
7651 if (*slot == NULL)
7652 {
7653 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7654 if (p == NULL)
7655 return NULL;
7656 *p = ent;
7657 *slot = p;
7658 }
7659 return *slot;
7660 }
7661
7662 /* Adjust all global syms defined in opd sections. In gcc generated
7663 code for the old ABI, these will already have been done. */
7664
7665 static bfd_boolean
7666 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7667 {
7668 struct ppc_link_hash_entry *eh;
7669 asection *sym_sec;
7670 struct _opd_sec_data *opd;
7671
7672 if (h->root.type == bfd_link_hash_indirect)
7673 return TRUE;
7674
7675 if (h->root.type != bfd_link_hash_defined
7676 && h->root.type != bfd_link_hash_defweak)
7677 return TRUE;
7678
7679 eh = (struct ppc_link_hash_entry *) h;
7680 if (eh->adjust_done)
7681 return TRUE;
7682
7683 sym_sec = eh->elf.root.u.def.section;
7684 opd = get_opd_info (sym_sec);
7685 if (opd != NULL && opd->adjust != NULL)
7686 {
7687 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7688 if (adjust == -1)
7689 {
7690 /* This entry has been deleted. */
7691 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7692 if (dsec == NULL)
7693 {
7694 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7695 if (discarded_section (dsec))
7696 {
7697 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7698 break;
7699 }
7700 }
7701 eh->elf.root.u.def.value = 0;
7702 eh->elf.root.u.def.section = dsec;
7703 }
7704 else
7705 eh->elf.root.u.def.value += adjust;
7706 eh->adjust_done = 1;
7707 }
7708 return TRUE;
7709 }
7710
7711 /* Handles decrementing dynamic reloc counts for the reloc specified by
7712 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7713 have already been determined. */
7714
7715 static bfd_boolean
7716 dec_dynrel_count (bfd_vma r_info,
7717 asection *sec,
7718 struct bfd_link_info *info,
7719 Elf_Internal_Sym **local_syms,
7720 struct elf_link_hash_entry *h,
7721 Elf_Internal_Sym *sym)
7722 {
7723 enum elf_ppc64_reloc_type r_type;
7724 asection *sym_sec = NULL;
7725
7726 /* Can this reloc be dynamic? This switch, and later tests here
7727 should be kept in sync with the code in check_relocs. */
7728 r_type = ELF64_R_TYPE (r_info);
7729 switch (r_type)
7730 {
7731 default:
7732 return TRUE;
7733
7734 case R_PPC64_TPREL16:
7735 case R_PPC64_TPREL16_LO:
7736 case R_PPC64_TPREL16_HI:
7737 case R_PPC64_TPREL16_HA:
7738 case R_PPC64_TPREL16_DS:
7739 case R_PPC64_TPREL16_LO_DS:
7740 case R_PPC64_TPREL16_HIGH:
7741 case R_PPC64_TPREL16_HIGHA:
7742 case R_PPC64_TPREL16_HIGHER:
7743 case R_PPC64_TPREL16_HIGHERA:
7744 case R_PPC64_TPREL16_HIGHEST:
7745 case R_PPC64_TPREL16_HIGHESTA:
7746 if (!bfd_link_pic (info))
7747 return TRUE;
7748
7749 case R_PPC64_TPREL64:
7750 case R_PPC64_DTPMOD64:
7751 case R_PPC64_DTPREL64:
7752 case R_PPC64_ADDR64:
7753 case R_PPC64_REL30:
7754 case R_PPC64_REL32:
7755 case R_PPC64_REL64:
7756 case R_PPC64_ADDR14:
7757 case R_PPC64_ADDR14_BRNTAKEN:
7758 case R_PPC64_ADDR14_BRTAKEN:
7759 case R_PPC64_ADDR16:
7760 case R_PPC64_ADDR16_DS:
7761 case R_PPC64_ADDR16_HA:
7762 case R_PPC64_ADDR16_HI:
7763 case R_PPC64_ADDR16_HIGH:
7764 case R_PPC64_ADDR16_HIGHA:
7765 case R_PPC64_ADDR16_HIGHER:
7766 case R_PPC64_ADDR16_HIGHERA:
7767 case R_PPC64_ADDR16_HIGHEST:
7768 case R_PPC64_ADDR16_HIGHESTA:
7769 case R_PPC64_ADDR16_LO:
7770 case R_PPC64_ADDR16_LO_DS:
7771 case R_PPC64_ADDR24:
7772 case R_PPC64_ADDR32:
7773 case R_PPC64_UADDR16:
7774 case R_PPC64_UADDR32:
7775 case R_PPC64_UADDR64:
7776 case R_PPC64_TOC:
7777 break;
7778 }
7779
7780 if (local_syms != NULL)
7781 {
7782 unsigned long r_symndx;
7783 bfd *ibfd = sec->owner;
7784
7785 r_symndx = ELF64_R_SYM (r_info);
7786 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7787 return FALSE;
7788 }
7789
7790 if ((bfd_link_pic (info)
7791 && (must_be_dyn_reloc (info, r_type)
7792 || (h != NULL
7793 && (!SYMBOLIC_BIND (info, h)
7794 || h->root.type == bfd_link_hash_defweak
7795 || !h->def_regular))))
7796 || (ELIMINATE_COPY_RELOCS
7797 && !bfd_link_pic (info)
7798 && h != NULL
7799 && (h->root.type == bfd_link_hash_defweak
7800 || !h->def_regular)))
7801 ;
7802 else
7803 return TRUE;
7804
7805 if (h != NULL)
7806 {
7807 struct elf_dyn_relocs *p;
7808 struct elf_dyn_relocs **pp;
7809 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7810
7811 /* elf_gc_sweep may have already removed all dyn relocs associated
7812 with local syms for a given section. Also, symbol flags are
7813 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7814 report a dynreloc miscount. */
7815 if (*pp == NULL && info->gc_sections)
7816 return TRUE;
7817
7818 while ((p = *pp) != NULL)
7819 {
7820 if (p->sec == sec)
7821 {
7822 if (!must_be_dyn_reloc (info, r_type))
7823 p->pc_count -= 1;
7824 p->count -= 1;
7825 if (p->count == 0)
7826 *pp = p->next;
7827 return TRUE;
7828 }
7829 pp = &p->next;
7830 }
7831 }
7832 else
7833 {
7834 struct ppc_dyn_relocs *p;
7835 struct ppc_dyn_relocs **pp;
7836 void *vpp;
7837 bfd_boolean is_ifunc;
7838
7839 if (local_syms == NULL)
7840 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7841 if (sym_sec == NULL)
7842 sym_sec = sec;
7843
7844 vpp = &elf_section_data (sym_sec)->local_dynrel;
7845 pp = (struct ppc_dyn_relocs **) vpp;
7846
7847 if (*pp == NULL && info->gc_sections)
7848 return TRUE;
7849
7850 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7851 while ((p = *pp) != NULL)
7852 {
7853 if (p->sec == sec && p->ifunc == is_ifunc)
7854 {
7855 p->count -= 1;
7856 if (p->count == 0)
7857 *pp = p->next;
7858 return TRUE;
7859 }
7860 pp = &p->next;
7861 }
7862 }
7863
7864 /* xgettext:c-format */
7865 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7866 sec->owner, sec);
7867 bfd_set_error (bfd_error_bad_value);
7868 return FALSE;
7869 }
7870
7871 /* Remove unused Official Procedure Descriptor entries. Currently we
7872 only remove those associated with functions in discarded link-once
7873 sections, or weakly defined functions that have been overridden. It
7874 would be possible to remove many more entries for statically linked
7875 applications. */
7876
7877 bfd_boolean
7878 ppc64_elf_edit_opd (struct bfd_link_info *info)
7879 {
7880 bfd *ibfd;
7881 bfd_boolean some_edited = FALSE;
7882 asection *need_pad = NULL;
7883 struct ppc_link_hash_table *htab;
7884
7885 htab = ppc_hash_table (info);
7886 if (htab == NULL)
7887 return FALSE;
7888
7889 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7890 {
7891 asection *sec;
7892 Elf_Internal_Rela *relstart, *rel, *relend;
7893 Elf_Internal_Shdr *symtab_hdr;
7894 Elf_Internal_Sym *local_syms;
7895 struct _opd_sec_data *opd;
7896 bfd_boolean need_edit, add_aux_fields, broken;
7897 bfd_size_type cnt_16b = 0;
7898
7899 if (!is_ppc64_elf (ibfd))
7900 continue;
7901
7902 sec = bfd_get_section_by_name (ibfd, ".opd");
7903 if (sec == NULL || sec->size == 0)
7904 continue;
7905
7906 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7907 continue;
7908
7909 if (sec->output_section == bfd_abs_section_ptr)
7910 continue;
7911
7912 /* Look through the section relocs. */
7913 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7914 continue;
7915
7916 local_syms = NULL;
7917 symtab_hdr = &elf_symtab_hdr (ibfd);
7918
7919 /* Read the relocations. */
7920 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7921 info->keep_memory);
7922 if (relstart == NULL)
7923 return FALSE;
7924
7925 /* First run through the relocs to check they are sane, and to
7926 determine whether we need to edit this opd section. */
7927 need_edit = FALSE;
7928 broken = FALSE;
7929 need_pad = sec;
7930 relend = relstart + sec->reloc_count;
7931 for (rel = relstart; rel < relend; )
7932 {
7933 enum elf_ppc64_reloc_type r_type;
7934 unsigned long r_symndx;
7935 asection *sym_sec;
7936 struct elf_link_hash_entry *h;
7937 Elf_Internal_Sym *sym;
7938 bfd_vma offset;
7939
7940 /* .opd contains an array of 16 or 24 byte entries. We're
7941 only interested in the reloc pointing to a function entry
7942 point. */
7943 offset = rel->r_offset;
7944 if (rel + 1 == relend
7945 || rel[1].r_offset != offset + 8)
7946 {
7947 /* If someone messes with .opd alignment then after a
7948 "ld -r" we might have padding in the middle of .opd.
7949 Also, there's nothing to prevent someone putting
7950 something silly in .opd with the assembler. No .opd
7951 optimization for them! */
7952 broken_opd:
7953 _bfd_error_handler
7954 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7955 broken = TRUE;
7956 break;
7957 }
7958
7959 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7960 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7961 {
7962 _bfd_error_handler
7963 /* xgettext:c-format */
7964 (_("%B: unexpected reloc type %u in .opd section"),
7965 ibfd, r_type);
7966 broken = TRUE;
7967 break;
7968 }
7969
7970 r_symndx = ELF64_R_SYM (rel->r_info);
7971 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7972 r_symndx, ibfd))
7973 goto error_ret;
7974
7975 if (sym_sec == NULL || sym_sec->owner == NULL)
7976 {
7977 const char *sym_name;
7978 if (h != NULL)
7979 sym_name = h->root.root.string;
7980 else
7981 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7982 sym_sec);
7983
7984 _bfd_error_handler
7985 /* xgettext:c-format */
7986 (_("%B: undefined sym `%s' in .opd section"),
7987 ibfd, sym_name);
7988 broken = TRUE;
7989 break;
7990 }
7991
7992 /* opd entries are always for functions defined in the
7993 current input bfd. If the symbol isn't defined in the
7994 input bfd, then we won't be using the function in this
7995 bfd; It must be defined in a linkonce section in another
7996 bfd, or is weak. It's also possible that we are
7997 discarding the function due to a linker script /DISCARD/,
7998 which we test for via the output_section. */
7999 if (sym_sec->owner != ibfd
8000 || sym_sec->output_section == bfd_abs_section_ptr)
8001 need_edit = TRUE;
8002
8003 rel += 2;
8004 if (rel + 1 == relend
8005 || (rel + 2 < relend
8006 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8007 ++rel;
8008
8009 if (rel == relend)
8010 {
8011 if (sec->size == offset + 24)
8012 {
8013 need_pad = NULL;
8014 break;
8015 }
8016 if (sec->size == offset + 16)
8017 {
8018 cnt_16b++;
8019 break;
8020 }
8021 goto broken_opd;
8022 }
8023 else if (rel + 1 < relend
8024 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8025 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8026 {
8027 if (rel[0].r_offset == offset + 16)
8028 cnt_16b++;
8029 else if (rel[0].r_offset != offset + 24)
8030 goto broken_opd;
8031 }
8032 else
8033 goto broken_opd;
8034 }
8035
8036 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8037
8038 if (!broken && (need_edit || add_aux_fields))
8039 {
8040 Elf_Internal_Rela *write_rel;
8041 Elf_Internal_Shdr *rel_hdr;
8042 bfd_byte *rptr, *wptr;
8043 bfd_byte *new_contents;
8044 bfd_size_type amt;
8045
8046 new_contents = NULL;
8047 amt = OPD_NDX (sec->size) * sizeof (long);
8048 opd = &ppc64_elf_section_data (sec)->u.opd;
8049 opd->adjust = bfd_zalloc (sec->owner, amt);
8050 if (opd->adjust == NULL)
8051 return FALSE;
8052 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8053
8054 /* This seems a waste of time as input .opd sections are all
8055 zeros as generated by gcc, but I suppose there's no reason
8056 this will always be so. We might start putting something in
8057 the third word of .opd entries. */
8058 if ((sec->flags & SEC_IN_MEMORY) == 0)
8059 {
8060 bfd_byte *loc;
8061 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8062 {
8063 if (loc != NULL)
8064 free (loc);
8065 error_ret:
8066 if (local_syms != NULL
8067 && symtab_hdr->contents != (unsigned char *) local_syms)
8068 free (local_syms);
8069 if (elf_section_data (sec)->relocs != relstart)
8070 free (relstart);
8071 return FALSE;
8072 }
8073 sec->contents = loc;
8074 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8075 }
8076
8077 elf_section_data (sec)->relocs = relstart;
8078
8079 new_contents = sec->contents;
8080 if (add_aux_fields)
8081 {
8082 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8083 if (new_contents == NULL)
8084 return FALSE;
8085 need_pad = NULL;
8086 }
8087 wptr = new_contents;
8088 rptr = sec->contents;
8089 write_rel = relstart;
8090 for (rel = relstart; rel < relend; )
8091 {
8092 unsigned long r_symndx;
8093 asection *sym_sec;
8094 struct elf_link_hash_entry *h;
8095 struct ppc_link_hash_entry *fdh = NULL;
8096 Elf_Internal_Sym *sym;
8097 long opd_ent_size;
8098 Elf_Internal_Rela *next_rel;
8099 bfd_boolean skip;
8100
8101 r_symndx = ELF64_R_SYM (rel->r_info);
8102 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8103 r_symndx, ibfd))
8104 goto error_ret;
8105
8106 next_rel = rel + 2;
8107 if (next_rel + 1 == relend
8108 || (next_rel + 2 < relend
8109 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8110 ++next_rel;
8111
8112 /* See if the .opd entry is full 24 byte or
8113 16 byte (with fd_aux entry overlapped with next
8114 fd_func). */
8115 opd_ent_size = 24;
8116 if (next_rel == relend)
8117 {
8118 if (sec->size == rel->r_offset + 16)
8119 opd_ent_size = 16;
8120 }
8121 else if (next_rel->r_offset == rel->r_offset + 16)
8122 opd_ent_size = 16;
8123
8124 if (h != NULL
8125 && h->root.root.string[0] == '.')
8126 {
8127 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8128 if (fdh != NULL)
8129 {
8130 fdh = ppc_follow_link (fdh);
8131 if (fdh->elf.root.type != bfd_link_hash_defined
8132 && fdh->elf.root.type != bfd_link_hash_defweak)
8133 fdh = NULL;
8134 }
8135 }
8136
8137 skip = (sym_sec->owner != ibfd
8138 || sym_sec->output_section == bfd_abs_section_ptr);
8139 if (skip)
8140 {
8141 if (fdh != NULL && sym_sec->owner == ibfd)
8142 {
8143 /* Arrange for the function descriptor sym
8144 to be dropped. */
8145 fdh->elf.root.u.def.value = 0;
8146 fdh->elf.root.u.def.section = sym_sec;
8147 }
8148 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8149
8150 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8151 rel = next_rel;
8152 else
8153 while (1)
8154 {
8155 if (!dec_dynrel_count (rel->r_info, sec, info,
8156 NULL, h, sym))
8157 goto error_ret;
8158
8159 if (++rel == next_rel)
8160 break;
8161
8162 r_symndx = ELF64_R_SYM (rel->r_info);
8163 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8164 r_symndx, ibfd))
8165 goto error_ret;
8166 }
8167 }
8168 else
8169 {
8170 /* We'll be keeping this opd entry. */
8171 long adjust;
8172
8173 if (fdh != NULL)
8174 {
8175 /* Redefine the function descriptor symbol to
8176 this location in the opd section. It is
8177 necessary to update the value here rather
8178 than using an array of adjustments as we do
8179 for local symbols, because various places
8180 in the generic ELF code use the value
8181 stored in u.def.value. */
8182 fdh->elf.root.u.def.value = wptr - new_contents;
8183 fdh->adjust_done = 1;
8184 }
8185
8186 /* Local syms are a bit tricky. We could
8187 tweak them as they can be cached, but
8188 we'd need to look through the local syms
8189 for the function descriptor sym which we
8190 don't have at the moment. So keep an
8191 array of adjustments. */
8192 adjust = (wptr - new_contents) - (rptr - sec->contents);
8193 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8194
8195 if (wptr != rptr)
8196 memcpy (wptr, rptr, opd_ent_size);
8197 wptr += opd_ent_size;
8198 if (add_aux_fields && opd_ent_size == 16)
8199 {
8200 memset (wptr, '\0', 8);
8201 wptr += 8;
8202 }
8203
8204 /* We need to adjust any reloc offsets to point to the
8205 new opd entries. */
8206 for ( ; rel != next_rel; ++rel)
8207 {
8208 rel->r_offset += adjust;
8209 if (write_rel != rel)
8210 memcpy (write_rel, rel, sizeof (*rel));
8211 ++write_rel;
8212 }
8213 }
8214
8215 rptr += opd_ent_size;
8216 }
8217
8218 sec->size = wptr - new_contents;
8219 sec->reloc_count = write_rel - relstart;
8220 if (add_aux_fields)
8221 {
8222 free (sec->contents);
8223 sec->contents = new_contents;
8224 }
8225
8226 /* Fudge the header size too, as this is used later in
8227 elf_bfd_final_link if we are emitting relocs. */
8228 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8229 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8230 some_edited = TRUE;
8231 }
8232 else if (elf_section_data (sec)->relocs != relstart)
8233 free (relstart);
8234
8235 if (local_syms != NULL
8236 && symtab_hdr->contents != (unsigned char *) local_syms)
8237 {
8238 if (!info->keep_memory)
8239 free (local_syms);
8240 else
8241 symtab_hdr->contents = (unsigned char *) local_syms;
8242 }
8243 }
8244
8245 if (some_edited)
8246 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8247
8248 /* If we are doing a final link and the last .opd entry is just 16 byte
8249 long, add a 8 byte padding after it. */
8250 if (need_pad != NULL && !bfd_link_relocatable (info))
8251 {
8252 bfd_byte *p;
8253
8254 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8255 {
8256 BFD_ASSERT (need_pad->size > 0);
8257
8258 p = bfd_malloc (need_pad->size + 8);
8259 if (p == NULL)
8260 return FALSE;
8261
8262 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8263 p, 0, need_pad->size))
8264 return FALSE;
8265
8266 need_pad->contents = p;
8267 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8268 }
8269 else
8270 {
8271 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8272 if (p == NULL)
8273 return FALSE;
8274
8275 need_pad->contents = p;
8276 }
8277
8278 memset (need_pad->contents + need_pad->size, 0, 8);
8279 need_pad->size += 8;
8280 }
8281
8282 return TRUE;
8283 }
8284
8285 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8286
8287 asection *
8288 ppc64_elf_tls_setup (struct bfd_link_info *info)
8289 {
8290 struct ppc_link_hash_table *htab;
8291
8292 htab = ppc_hash_table (info);
8293 if (htab == NULL)
8294 return NULL;
8295
8296 if (abiversion (info->output_bfd) == 1)
8297 htab->opd_abi = 1;
8298
8299 if (htab->params->no_multi_toc)
8300 htab->do_multi_toc = 0;
8301 else if (!htab->do_multi_toc)
8302 htab->params->no_multi_toc = 1;
8303
8304 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8305 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8306 FALSE, FALSE, TRUE));
8307 /* Move dynamic linking info to the function descriptor sym. */
8308 if (htab->tls_get_addr != NULL)
8309 func_desc_adjust (&htab->tls_get_addr->elf, info);
8310 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8311 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8312 FALSE, FALSE, TRUE));
8313 if (htab->params->tls_get_addr_opt)
8314 {
8315 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8316
8317 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8318 FALSE, FALSE, TRUE);
8319 if (opt != NULL)
8320 func_desc_adjust (opt, info);
8321 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8322 FALSE, FALSE, TRUE);
8323 if (opt_fd != NULL
8324 && (opt_fd->root.type == bfd_link_hash_defined
8325 || opt_fd->root.type == bfd_link_hash_defweak))
8326 {
8327 /* If glibc supports an optimized __tls_get_addr call stub,
8328 signalled by the presence of __tls_get_addr_opt, and we'll
8329 be calling __tls_get_addr via a plt call stub, then
8330 make __tls_get_addr point to __tls_get_addr_opt. */
8331 tga_fd = &htab->tls_get_addr_fd->elf;
8332 if (htab->elf.dynamic_sections_created
8333 && tga_fd != NULL
8334 && (tga_fd->type == STT_FUNC
8335 || tga_fd->needs_plt)
8336 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8337 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8338 && tga_fd->root.type == bfd_link_hash_undefweak)))
8339 {
8340 struct plt_entry *ent;
8341
8342 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8343 if (ent->plt.refcount > 0)
8344 break;
8345 if (ent != NULL)
8346 {
8347 tga_fd->root.type = bfd_link_hash_indirect;
8348 tga_fd->root.u.i.link = &opt_fd->root;
8349 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8350 opt_fd->mark = 1;
8351 if (opt_fd->dynindx != -1)
8352 {
8353 /* Use __tls_get_addr_opt in dynamic relocations. */
8354 opt_fd->dynindx = -1;
8355 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8356 opt_fd->dynstr_index);
8357 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8358 return NULL;
8359 }
8360 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8361 tga = &htab->tls_get_addr->elf;
8362 if (opt != NULL && tga != NULL)
8363 {
8364 tga->root.type = bfd_link_hash_indirect;
8365 tga->root.u.i.link = &opt->root;
8366 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8367 opt->mark = 1;
8368 _bfd_elf_link_hash_hide_symbol (info, opt,
8369 tga->forced_local);
8370 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8371 }
8372 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8373 htab->tls_get_addr_fd->is_func_descriptor = 1;
8374 if (htab->tls_get_addr != NULL)
8375 {
8376 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8377 htab->tls_get_addr->is_func = 1;
8378 }
8379 }
8380 }
8381 }
8382 else if (htab->params->tls_get_addr_opt < 0)
8383 htab->params->tls_get_addr_opt = 0;
8384 }
8385 return _bfd_elf_tls_setup (info->output_bfd, info);
8386 }
8387
8388 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8389 HASH1 or HASH2. */
8390
8391 static bfd_boolean
8392 branch_reloc_hash_match (const bfd *ibfd,
8393 const Elf_Internal_Rela *rel,
8394 const struct ppc_link_hash_entry *hash1,
8395 const struct ppc_link_hash_entry *hash2)
8396 {
8397 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8398 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8399 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8400
8401 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8402 {
8403 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8404 struct elf_link_hash_entry *h;
8405
8406 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8407 h = elf_follow_link (h);
8408 if (h == &hash1->elf || h == &hash2->elf)
8409 return TRUE;
8410 }
8411 return FALSE;
8412 }
8413
8414 /* Run through all the TLS relocs looking for optimization
8415 opportunities. The linker has been hacked (see ppc64elf.em) to do
8416 a preliminary section layout so that we know the TLS segment
8417 offsets. We can't optimize earlier because some optimizations need
8418 to know the tp offset, and we need to optimize before allocating
8419 dynamic relocations. */
8420
8421 bfd_boolean
8422 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8423 {
8424 bfd *ibfd;
8425 asection *sec;
8426 struct ppc_link_hash_table *htab;
8427 unsigned char *toc_ref;
8428 int pass;
8429
8430 if (!bfd_link_executable (info))
8431 return TRUE;
8432
8433 htab = ppc_hash_table (info);
8434 if (htab == NULL)
8435 return FALSE;
8436
8437 /* Make two passes over the relocs. On the first pass, mark toc
8438 entries involved with tls relocs, and check that tls relocs
8439 involved in setting up a tls_get_addr call are indeed followed by
8440 such a call. If they are not, we can't do any tls optimization.
8441 On the second pass twiddle tls_mask flags to notify
8442 relocate_section that optimization can be done, and adjust got
8443 and plt refcounts. */
8444 toc_ref = NULL;
8445 for (pass = 0; pass < 2; ++pass)
8446 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8447 {
8448 Elf_Internal_Sym *locsyms = NULL;
8449 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8450
8451 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8452 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8453 {
8454 Elf_Internal_Rela *relstart, *rel, *relend;
8455 bfd_boolean found_tls_get_addr_arg = 0;
8456
8457 /* Read the relocations. */
8458 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8459 info->keep_memory);
8460 if (relstart == NULL)
8461 {
8462 free (toc_ref);
8463 return FALSE;
8464 }
8465
8466 relend = relstart + sec->reloc_count;
8467 for (rel = relstart; rel < relend; rel++)
8468 {
8469 enum elf_ppc64_reloc_type r_type;
8470 unsigned long r_symndx;
8471 struct elf_link_hash_entry *h;
8472 Elf_Internal_Sym *sym;
8473 asection *sym_sec;
8474 unsigned char *tls_mask;
8475 unsigned char tls_set, tls_clear, tls_type = 0;
8476 bfd_vma value;
8477 bfd_boolean ok_tprel, is_local;
8478 long toc_ref_index = 0;
8479 int expecting_tls_get_addr = 0;
8480 bfd_boolean ret = FALSE;
8481
8482 r_symndx = ELF64_R_SYM (rel->r_info);
8483 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8484 r_symndx, ibfd))
8485 {
8486 err_free_rel:
8487 if (elf_section_data (sec)->relocs != relstart)
8488 free (relstart);
8489 if (toc_ref != NULL)
8490 free (toc_ref);
8491 if (locsyms != NULL
8492 && (elf_symtab_hdr (ibfd).contents
8493 != (unsigned char *) locsyms))
8494 free (locsyms);
8495 return ret;
8496 }
8497
8498 if (h != NULL)
8499 {
8500 if (h->root.type == bfd_link_hash_defined
8501 || h->root.type == bfd_link_hash_defweak)
8502 value = h->root.u.def.value;
8503 else if (h->root.type == bfd_link_hash_undefweak)
8504 value = 0;
8505 else
8506 {
8507 found_tls_get_addr_arg = 0;
8508 continue;
8509 }
8510 }
8511 else
8512 /* Symbols referenced by TLS relocs must be of type
8513 STT_TLS. So no need for .opd local sym adjust. */
8514 value = sym->st_value;
8515
8516 ok_tprel = FALSE;
8517 is_local = FALSE;
8518 if (h == NULL
8519 || !h->def_dynamic)
8520 {
8521 is_local = TRUE;
8522 if (h != NULL
8523 && h->root.type == bfd_link_hash_undefweak)
8524 ok_tprel = TRUE;
8525 else if (sym_sec != NULL
8526 && sym_sec->output_section != NULL)
8527 {
8528 value += sym_sec->output_offset;
8529 value += sym_sec->output_section->vma;
8530 value -= htab->elf.tls_sec->vma;
8531 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8532 < (bfd_vma) 1 << 32);
8533 }
8534 }
8535
8536 r_type = ELF64_R_TYPE (rel->r_info);
8537 /* If this section has old-style __tls_get_addr calls
8538 without marker relocs, then check that each
8539 __tls_get_addr call reloc is preceded by a reloc
8540 that conceivably belongs to the __tls_get_addr arg
8541 setup insn. If we don't find matching arg setup
8542 relocs, don't do any tls optimization. */
8543 if (pass == 0
8544 && sec->has_tls_get_addr_call
8545 && h != NULL
8546 && (h == &htab->tls_get_addr->elf
8547 || h == &htab->tls_get_addr_fd->elf)
8548 && !found_tls_get_addr_arg
8549 && is_branch_reloc (r_type))
8550 {
8551 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8552 "TLS optimization disabled\n"),
8553 ibfd, sec, rel->r_offset);
8554 ret = TRUE;
8555 goto err_free_rel;
8556 }
8557
8558 found_tls_get_addr_arg = 0;
8559 switch (r_type)
8560 {
8561 case R_PPC64_GOT_TLSLD16:
8562 case R_PPC64_GOT_TLSLD16_LO:
8563 expecting_tls_get_addr = 1;
8564 found_tls_get_addr_arg = 1;
8565 /* Fall through. */
8566
8567 case R_PPC64_GOT_TLSLD16_HI:
8568 case R_PPC64_GOT_TLSLD16_HA:
8569 /* These relocs should never be against a symbol
8570 defined in a shared lib. Leave them alone if
8571 that turns out to be the case. */
8572 if (!is_local)
8573 continue;
8574
8575 /* LD -> LE */
8576 tls_set = 0;
8577 tls_clear = TLS_LD;
8578 tls_type = TLS_TLS | TLS_LD;
8579 break;
8580
8581 case R_PPC64_GOT_TLSGD16:
8582 case R_PPC64_GOT_TLSGD16_LO:
8583 expecting_tls_get_addr = 1;
8584 found_tls_get_addr_arg = 1;
8585 /* Fall through. */
8586
8587 case R_PPC64_GOT_TLSGD16_HI:
8588 case R_PPC64_GOT_TLSGD16_HA:
8589 if (ok_tprel)
8590 /* GD -> LE */
8591 tls_set = 0;
8592 else
8593 /* GD -> IE */
8594 tls_set = TLS_TLS | TLS_TPRELGD;
8595 tls_clear = TLS_GD;
8596 tls_type = TLS_TLS | TLS_GD;
8597 break;
8598
8599 case R_PPC64_GOT_TPREL16_DS:
8600 case R_PPC64_GOT_TPREL16_LO_DS:
8601 case R_PPC64_GOT_TPREL16_HI:
8602 case R_PPC64_GOT_TPREL16_HA:
8603 if (ok_tprel)
8604 {
8605 /* IE -> LE */
8606 tls_set = 0;
8607 tls_clear = TLS_TPREL;
8608 tls_type = TLS_TLS | TLS_TPREL;
8609 break;
8610 }
8611 continue;
8612
8613 case R_PPC64_TLSGD:
8614 case R_PPC64_TLSLD:
8615 found_tls_get_addr_arg = 1;
8616 /* Fall through. */
8617
8618 case R_PPC64_TLS:
8619 case R_PPC64_TOC16:
8620 case R_PPC64_TOC16_LO:
8621 if (sym_sec == NULL || sym_sec != toc)
8622 continue;
8623
8624 /* Mark this toc entry as referenced by a TLS
8625 code sequence. We can do that now in the
8626 case of R_PPC64_TLS, and after checking for
8627 tls_get_addr for the TOC16 relocs. */
8628 if (toc_ref == NULL)
8629 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8630 if (toc_ref == NULL)
8631 goto err_free_rel;
8632
8633 if (h != NULL)
8634 value = h->root.u.def.value;
8635 else
8636 value = sym->st_value;
8637 value += rel->r_addend;
8638 if (value % 8 != 0)
8639 continue;
8640 BFD_ASSERT (value < toc->size
8641 && toc->output_offset % 8 == 0);
8642 toc_ref_index = (value + toc->output_offset) / 8;
8643 if (r_type == R_PPC64_TLS
8644 || r_type == R_PPC64_TLSGD
8645 || r_type == R_PPC64_TLSLD)
8646 {
8647 toc_ref[toc_ref_index] = 1;
8648 continue;
8649 }
8650
8651 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8652 continue;
8653
8654 tls_set = 0;
8655 tls_clear = 0;
8656 expecting_tls_get_addr = 2;
8657 break;
8658
8659 case R_PPC64_TPREL64:
8660 if (pass == 0
8661 || sec != toc
8662 || toc_ref == NULL
8663 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8664 continue;
8665 if (ok_tprel)
8666 {
8667 /* IE -> LE */
8668 tls_set = TLS_EXPLICIT;
8669 tls_clear = TLS_TPREL;
8670 break;
8671 }
8672 continue;
8673
8674 case R_PPC64_DTPMOD64:
8675 if (pass == 0
8676 || sec != toc
8677 || toc_ref == NULL
8678 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8679 continue;
8680 if (rel + 1 < relend
8681 && (rel[1].r_info
8682 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8683 && rel[1].r_offset == rel->r_offset + 8)
8684 {
8685 if (ok_tprel)
8686 /* GD -> LE */
8687 tls_set = TLS_EXPLICIT | TLS_GD;
8688 else
8689 /* GD -> IE */
8690 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8691 tls_clear = TLS_GD;
8692 }
8693 else
8694 {
8695 if (!is_local)
8696 continue;
8697
8698 /* LD -> LE */
8699 tls_set = TLS_EXPLICIT;
8700 tls_clear = TLS_LD;
8701 }
8702 break;
8703
8704 default:
8705 continue;
8706 }
8707
8708 if (pass == 0)
8709 {
8710 if (!expecting_tls_get_addr
8711 || !sec->has_tls_get_addr_call)
8712 continue;
8713
8714 if (rel + 1 < relend
8715 && branch_reloc_hash_match (ibfd, rel + 1,
8716 htab->tls_get_addr,
8717 htab->tls_get_addr_fd))
8718 {
8719 if (expecting_tls_get_addr == 2)
8720 {
8721 /* Check for toc tls entries. */
8722 unsigned char *toc_tls;
8723 int retval;
8724
8725 retval = get_tls_mask (&toc_tls, NULL, NULL,
8726 &locsyms,
8727 rel, ibfd);
8728 if (retval == 0)
8729 goto err_free_rel;
8730 if (toc_tls != NULL)
8731 {
8732 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8733 found_tls_get_addr_arg = 1;
8734 if (retval > 1)
8735 toc_ref[toc_ref_index] = 1;
8736 }
8737 }
8738 continue;
8739 }
8740
8741 if (expecting_tls_get_addr != 1)
8742 continue;
8743
8744 /* Uh oh, we didn't find the expected call. We
8745 could just mark this symbol to exclude it
8746 from tls optimization but it's safer to skip
8747 the entire optimization. */
8748 /* xgettext:c-format */
8749 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8750 "TLS optimization disabled\n"),
8751 ibfd, sec, rel->r_offset);
8752 ret = TRUE;
8753 goto err_free_rel;
8754 }
8755
8756 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8757 {
8758 struct plt_entry *ent;
8759 for (ent = htab->tls_get_addr->elf.plt.plist;
8760 ent != NULL;
8761 ent = ent->next)
8762 if (ent->addend == 0)
8763 {
8764 if (ent->plt.refcount > 0)
8765 {
8766 ent->plt.refcount -= 1;
8767 expecting_tls_get_addr = 0;
8768 }
8769 break;
8770 }
8771 }
8772
8773 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8774 {
8775 struct plt_entry *ent;
8776 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8777 ent != NULL;
8778 ent = ent->next)
8779 if (ent->addend == 0)
8780 {
8781 if (ent->plt.refcount > 0)
8782 ent->plt.refcount -= 1;
8783 break;
8784 }
8785 }
8786
8787 if (tls_clear == 0)
8788 continue;
8789
8790 if ((tls_set & TLS_EXPLICIT) == 0)
8791 {
8792 struct got_entry *ent;
8793
8794 /* Adjust got entry for this reloc. */
8795 if (h != NULL)
8796 ent = h->got.glist;
8797 else
8798 ent = elf_local_got_ents (ibfd)[r_symndx];
8799
8800 for (; ent != NULL; ent = ent->next)
8801 if (ent->addend == rel->r_addend
8802 && ent->owner == ibfd
8803 && ent->tls_type == tls_type)
8804 break;
8805 if (ent == NULL)
8806 abort ();
8807
8808 if (tls_set == 0)
8809 {
8810 /* We managed to get rid of a got entry. */
8811 if (ent->got.refcount > 0)
8812 ent->got.refcount -= 1;
8813 }
8814 }
8815 else
8816 {
8817 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8818 we'll lose one or two dyn relocs. */
8819 if (!dec_dynrel_count (rel->r_info, sec, info,
8820 NULL, h, sym))
8821 return FALSE;
8822
8823 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8824 {
8825 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8826 NULL, h, sym))
8827 return FALSE;
8828 }
8829 }
8830
8831 *tls_mask |= tls_set;
8832 *tls_mask &= ~tls_clear;
8833 }
8834
8835 if (elf_section_data (sec)->relocs != relstart)
8836 free (relstart);
8837 }
8838
8839 if (locsyms != NULL
8840 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8841 {
8842 if (!info->keep_memory)
8843 free (locsyms);
8844 else
8845 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8846 }
8847 }
8848
8849 if (toc_ref != NULL)
8850 free (toc_ref);
8851 return TRUE;
8852 }
8853
8854 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8855 the values of any global symbols in a toc section that has been
8856 edited. Globals in toc sections should be a rarity, so this function
8857 sets a flag if any are found in toc sections other than the one just
8858 edited, so that futher hash table traversals can be avoided. */
8859
8860 struct adjust_toc_info
8861 {
8862 asection *toc;
8863 unsigned long *skip;
8864 bfd_boolean global_toc_syms;
8865 };
8866
8867 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8868
8869 static bfd_boolean
8870 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8871 {
8872 struct ppc_link_hash_entry *eh;
8873 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8874 unsigned long i;
8875
8876 if (h->root.type != bfd_link_hash_defined
8877 && h->root.type != bfd_link_hash_defweak)
8878 return TRUE;
8879
8880 eh = (struct ppc_link_hash_entry *) h;
8881 if (eh->adjust_done)
8882 return TRUE;
8883
8884 if (eh->elf.root.u.def.section == toc_inf->toc)
8885 {
8886 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8887 i = toc_inf->toc->rawsize >> 3;
8888 else
8889 i = eh->elf.root.u.def.value >> 3;
8890
8891 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8892 {
8893 _bfd_error_handler
8894 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8895 do
8896 ++i;
8897 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8898 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8899 }
8900
8901 eh->elf.root.u.def.value -= toc_inf->skip[i];
8902 eh->adjust_done = 1;
8903 }
8904 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8905 toc_inf->global_toc_syms = TRUE;
8906
8907 return TRUE;
8908 }
8909
8910 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8911 on a _LO variety toc/got reloc. */
8912
8913 static bfd_boolean
8914 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8915 {
8916 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8917 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8918 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8919 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8920 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8921 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8922 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8923 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8924 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8925 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8926 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8927 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8928 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8929 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8930 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8931 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8932 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8933 /* Exclude lfqu by testing reloc. If relocs are ever
8934 defined for the reduced D field in psq_lu then those
8935 will need testing too. */
8936 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8937 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8938 && (insn & 1) == 0)
8939 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8940 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8941 /* Exclude stfqu. psq_stu as above for psq_lu. */
8942 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8943 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8944 && (insn & 1) == 0));
8945 }
8946
8947 /* Examine all relocs referencing .toc sections in order to remove
8948 unused .toc entries. */
8949
8950 bfd_boolean
8951 ppc64_elf_edit_toc (struct bfd_link_info *info)
8952 {
8953 bfd *ibfd;
8954 struct adjust_toc_info toc_inf;
8955 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8956
8957 htab->do_toc_opt = 1;
8958 toc_inf.global_toc_syms = TRUE;
8959 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8960 {
8961 asection *toc, *sec;
8962 Elf_Internal_Shdr *symtab_hdr;
8963 Elf_Internal_Sym *local_syms;
8964 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8965 unsigned long *skip, *drop;
8966 unsigned char *used;
8967 unsigned char *keep, last, some_unused;
8968
8969 if (!is_ppc64_elf (ibfd))
8970 continue;
8971
8972 toc = bfd_get_section_by_name (ibfd, ".toc");
8973 if (toc == NULL
8974 || toc->size == 0
8975 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8976 || discarded_section (toc))
8977 continue;
8978
8979 toc_relocs = NULL;
8980 local_syms = NULL;
8981 symtab_hdr = &elf_symtab_hdr (ibfd);
8982
8983 /* Look at sections dropped from the final link. */
8984 skip = NULL;
8985 relstart = NULL;
8986 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8987 {
8988 if (sec->reloc_count == 0
8989 || !discarded_section (sec)
8990 || get_opd_info (sec)
8991 || (sec->flags & SEC_ALLOC) == 0
8992 || (sec->flags & SEC_DEBUGGING) != 0)
8993 continue;
8994
8995 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8996 if (relstart == NULL)
8997 goto error_ret;
8998
8999 /* Run through the relocs to see which toc entries might be
9000 unused. */
9001 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9002 {
9003 enum elf_ppc64_reloc_type r_type;
9004 unsigned long r_symndx;
9005 asection *sym_sec;
9006 struct elf_link_hash_entry *h;
9007 Elf_Internal_Sym *sym;
9008 bfd_vma val;
9009
9010 r_type = ELF64_R_TYPE (rel->r_info);
9011 switch (r_type)
9012 {
9013 default:
9014 continue;
9015
9016 case R_PPC64_TOC16:
9017 case R_PPC64_TOC16_LO:
9018 case R_PPC64_TOC16_HI:
9019 case R_PPC64_TOC16_HA:
9020 case R_PPC64_TOC16_DS:
9021 case R_PPC64_TOC16_LO_DS:
9022 break;
9023 }
9024
9025 r_symndx = ELF64_R_SYM (rel->r_info);
9026 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9027 r_symndx, ibfd))
9028 goto error_ret;
9029
9030 if (sym_sec != toc)
9031 continue;
9032
9033 if (h != NULL)
9034 val = h->root.u.def.value;
9035 else
9036 val = sym->st_value;
9037 val += rel->r_addend;
9038
9039 if (val >= toc->size)
9040 continue;
9041
9042 /* Anything in the toc ought to be aligned to 8 bytes.
9043 If not, don't mark as unused. */
9044 if (val & 7)
9045 continue;
9046
9047 if (skip == NULL)
9048 {
9049 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9050 if (skip == NULL)
9051 goto error_ret;
9052 }
9053
9054 skip[val >> 3] = ref_from_discarded;
9055 }
9056
9057 if (elf_section_data (sec)->relocs != relstart)
9058 free (relstart);
9059 }
9060
9061 /* For largetoc loads of address constants, we can convert
9062 . addis rx,2,addr@got@ha
9063 . ld ry,addr@got@l(rx)
9064 to
9065 . addis rx,2,addr@toc@ha
9066 . addi ry,rx,addr@toc@l
9067 when addr is within 2G of the toc pointer. This then means
9068 that the word storing "addr" in the toc is no longer needed. */
9069
9070 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9071 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9072 && toc->reloc_count != 0)
9073 {
9074 /* Read toc relocs. */
9075 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9076 info->keep_memory);
9077 if (toc_relocs == NULL)
9078 goto error_ret;
9079
9080 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9081 {
9082 enum elf_ppc64_reloc_type r_type;
9083 unsigned long r_symndx;
9084 asection *sym_sec;
9085 struct elf_link_hash_entry *h;
9086 Elf_Internal_Sym *sym;
9087 bfd_vma val, addr;
9088
9089 r_type = ELF64_R_TYPE (rel->r_info);
9090 if (r_type != R_PPC64_ADDR64)
9091 continue;
9092
9093 r_symndx = ELF64_R_SYM (rel->r_info);
9094 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9095 r_symndx, ibfd))
9096 goto error_ret;
9097
9098 if (sym_sec == NULL
9099 || sym_sec->output_section == NULL
9100 || discarded_section (sym_sec))
9101 continue;
9102
9103 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9104 continue;
9105
9106 if (h != NULL)
9107 {
9108 if (h->type == STT_GNU_IFUNC)
9109 continue;
9110 val = h->root.u.def.value;
9111 }
9112 else
9113 {
9114 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9115 continue;
9116 val = sym->st_value;
9117 }
9118 val += rel->r_addend;
9119 val += sym_sec->output_section->vma + sym_sec->output_offset;
9120
9121 /* We don't yet know the exact toc pointer value, but we
9122 know it will be somewhere in the toc section. Don't
9123 optimize if the difference from any possible toc
9124 pointer is outside [ff..f80008000, 7fff7fff]. */
9125 addr = toc->output_section->vma + TOC_BASE_OFF;
9126 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9127 continue;
9128
9129 addr = toc->output_section->vma + toc->output_section->rawsize;
9130 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9131 continue;
9132
9133 if (skip == NULL)
9134 {
9135 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9136 if (skip == NULL)
9137 goto error_ret;
9138 }
9139
9140 skip[rel->r_offset >> 3]
9141 |= can_optimize | ((rel - toc_relocs) << 2);
9142 }
9143 }
9144
9145 if (skip == NULL)
9146 continue;
9147
9148 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9149 if (used == NULL)
9150 {
9151 error_ret:
9152 if (local_syms != NULL
9153 && symtab_hdr->contents != (unsigned char *) local_syms)
9154 free (local_syms);
9155 if (sec != NULL
9156 && relstart != NULL
9157 && elf_section_data (sec)->relocs != relstart)
9158 free (relstart);
9159 if (toc_relocs != NULL
9160 && elf_section_data (toc)->relocs != toc_relocs)
9161 free (toc_relocs);
9162 if (skip != NULL)
9163 free (skip);
9164 return FALSE;
9165 }
9166
9167 /* Now check all kept sections that might reference the toc.
9168 Check the toc itself last. */
9169 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9170 : ibfd->sections);
9171 sec != NULL;
9172 sec = (sec == toc ? NULL
9173 : sec->next == NULL ? toc
9174 : sec->next == toc && toc->next ? toc->next
9175 : sec->next))
9176 {
9177 int repeat;
9178
9179 if (sec->reloc_count == 0
9180 || discarded_section (sec)
9181 || get_opd_info (sec)
9182 || (sec->flags & SEC_ALLOC) == 0
9183 || (sec->flags & SEC_DEBUGGING) != 0)
9184 continue;
9185
9186 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9187 info->keep_memory);
9188 if (relstart == NULL)
9189 {
9190 free (used);
9191 goto error_ret;
9192 }
9193
9194 /* Mark toc entries referenced as used. */
9195 do
9196 {
9197 repeat = 0;
9198 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9199 {
9200 enum elf_ppc64_reloc_type r_type;
9201 unsigned long r_symndx;
9202 asection *sym_sec;
9203 struct elf_link_hash_entry *h;
9204 Elf_Internal_Sym *sym;
9205 bfd_vma val;
9206 enum {no_check, check_lo, check_ha} insn_check;
9207
9208 r_type = ELF64_R_TYPE (rel->r_info);
9209 switch (r_type)
9210 {
9211 default:
9212 insn_check = no_check;
9213 break;
9214
9215 case R_PPC64_GOT_TLSLD16_HA:
9216 case R_PPC64_GOT_TLSGD16_HA:
9217 case R_PPC64_GOT_TPREL16_HA:
9218 case R_PPC64_GOT_DTPREL16_HA:
9219 case R_PPC64_GOT16_HA:
9220 case R_PPC64_TOC16_HA:
9221 insn_check = check_ha;
9222 break;
9223
9224 case R_PPC64_GOT_TLSLD16_LO:
9225 case R_PPC64_GOT_TLSGD16_LO:
9226 case R_PPC64_GOT_TPREL16_LO_DS:
9227 case R_PPC64_GOT_DTPREL16_LO_DS:
9228 case R_PPC64_GOT16_LO:
9229 case R_PPC64_GOT16_LO_DS:
9230 case R_PPC64_TOC16_LO:
9231 case R_PPC64_TOC16_LO_DS:
9232 insn_check = check_lo;
9233 break;
9234 }
9235
9236 if (insn_check != no_check)
9237 {
9238 bfd_vma off = rel->r_offset & ~3;
9239 unsigned char buf[4];
9240 unsigned int insn;
9241
9242 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9243 {
9244 free (used);
9245 goto error_ret;
9246 }
9247 insn = bfd_get_32 (ibfd, buf);
9248 if (insn_check == check_lo
9249 ? !ok_lo_toc_insn (insn, r_type)
9250 : ((insn & ((0x3f << 26) | 0x1f << 16))
9251 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9252 {
9253 char str[12];
9254
9255 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9256 sprintf (str, "%#08x", insn);
9257 info->callbacks->einfo
9258 /* xgettext:c-format */
9259 (_("%H: toc optimization is not supported for"
9260 " %s instruction.\n"),
9261 ibfd, sec, rel->r_offset & ~3, str);
9262 }
9263 }
9264
9265 switch (r_type)
9266 {
9267 case R_PPC64_TOC16:
9268 case R_PPC64_TOC16_LO:
9269 case R_PPC64_TOC16_HI:
9270 case R_PPC64_TOC16_HA:
9271 case R_PPC64_TOC16_DS:
9272 case R_PPC64_TOC16_LO_DS:
9273 /* In case we're taking addresses of toc entries. */
9274 case R_PPC64_ADDR64:
9275 break;
9276
9277 default:
9278 continue;
9279 }
9280
9281 r_symndx = ELF64_R_SYM (rel->r_info);
9282 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9283 r_symndx, ibfd))
9284 {
9285 free (used);
9286 goto error_ret;
9287 }
9288
9289 if (sym_sec != toc)
9290 continue;
9291
9292 if (h != NULL)
9293 val = h->root.u.def.value;
9294 else
9295 val = sym->st_value;
9296 val += rel->r_addend;
9297
9298 if (val >= toc->size)
9299 continue;
9300
9301 if ((skip[val >> 3] & can_optimize) != 0)
9302 {
9303 bfd_vma off;
9304 unsigned char opc;
9305
9306 switch (r_type)
9307 {
9308 case R_PPC64_TOC16_HA:
9309 break;
9310
9311 case R_PPC64_TOC16_LO_DS:
9312 off = rel->r_offset;
9313 off += (bfd_big_endian (ibfd) ? -2 : 3);
9314 if (!bfd_get_section_contents (ibfd, sec, &opc,
9315 off, 1))
9316 {
9317 free (used);
9318 goto error_ret;
9319 }
9320 if ((opc & (0x3f << 2)) == (58u << 2))
9321 break;
9322 /* Fall through. */
9323
9324 default:
9325 /* Wrong sort of reloc, or not a ld. We may
9326 as well clear ref_from_discarded too. */
9327 skip[val >> 3] = 0;
9328 }
9329 }
9330
9331 if (sec != toc)
9332 used[val >> 3] = 1;
9333 /* For the toc section, we only mark as used if this
9334 entry itself isn't unused. */
9335 else if ((used[rel->r_offset >> 3]
9336 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9337 && !used[val >> 3])
9338 {
9339 /* Do all the relocs again, to catch reference
9340 chains. */
9341 repeat = 1;
9342 used[val >> 3] = 1;
9343 }
9344 }
9345 }
9346 while (repeat);
9347
9348 if (elf_section_data (sec)->relocs != relstart)
9349 free (relstart);
9350 }
9351
9352 /* Merge the used and skip arrays. Assume that TOC
9353 doublewords not appearing as either used or unused belong
9354 to to an entry more than one doubleword in size. */
9355 for (drop = skip, keep = used, last = 0, some_unused = 0;
9356 drop < skip + (toc->size + 7) / 8;
9357 ++drop, ++keep)
9358 {
9359 if (*keep)
9360 {
9361 *drop &= ~ref_from_discarded;
9362 if ((*drop & can_optimize) != 0)
9363 some_unused = 1;
9364 last = 0;
9365 }
9366 else if ((*drop & ref_from_discarded) != 0)
9367 {
9368 some_unused = 1;
9369 last = ref_from_discarded;
9370 }
9371 else
9372 *drop = last;
9373 }
9374
9375 free (used);
9376
9377 if (some_unused)
9378 {
9379 bfd_byte *contents, *src;
9380 unsigned long off;
9381 Elf_Internal_Sym *sym;
9382 bfd_boolean local_toc_syms = FALSE;
9383
9384 /* Shuffle the toc contents, and at the same time convert the
9385 skip array from booleans into offsets. */
9386 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9387 goto error_ret;
9388
9389 elf_section_data (toc)->this_hdr.contents = contents;
9390
9391 for (src = contents, off = 0, drop = skip;
9392 src < contents + toc->size;
9393 src += 8, ++drop)
9394 {
9395 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9396 off += 8;
9397 else if (off != 0)
9398 {
9399 *drop = off;
9400 memcpy (src - off, src, 8);
9401 }
9402 }
9403 *drop = off;
9404 toc->rawsize = toc->size;
9405 toc->size = src - contents - off;
9406
9407 /* Adjust addends for relocs against the toc section sym,
9408 and optimize any accesses we can. */
9409 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9410 {
9411 if (sec->reloc_count == 0
9412 || discarded_section (sec))
9413 continue;
9414
9415 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9416 info->keep_memory);
9417 if (relstart == NULL)
9418 goto error_ret;
9419
9420 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9421 {
9422 enum elf_ppc64_reloc_type r_type;
9423 unsigned long r_symndx;
9424 asection *sym_sec;
9425 struct elf_link_hash_entry *h;
9426 bfd_vma val;
9427
9428 r_type = ELF64_R_TYPE (rel->r_info);
9429 switch (r_type)
9430 {
9431 default:
9432 continue;
9433
9434 case R_PPC64_TOC16:
9435 case R_PPC64_TOC16_LO:
9436 case R_PPC64_TOC16_HI:
9437 case R_PPC64_TOC16_HA:
9438 case R_PPC64_TOC16_DS:
9439 case R_PPC64_TOC16_LO_DS:
9440 case R_PPC64_ADDR64:
9441 break;
9442 }
9443
9444 r_symndx = ELF64_R_SYM (rel->r_info);
9445 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9446 r_symndx, ibfd))
9447 goto error_ret;
9448
9449 if (sym_sec != toc)
9450 continue;
9451
9452 if (h != NULL)
9453 val = h->root.u.def.value;
9454 else
9455 {
9456 val = sym->st_value;
9457 if (val != 0)
9458 local_toc_syms = TRUE;
9459 }
9460
9461 val += rel->r_addend;
9462
9463 if (val > toc->rawsize)
9464 val = toc->rawsize;
9465 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9466 continue;
9467 else if ((skip[val >> 3] & can_optimize) != 0)
9468 {
9469 Elf_Internal_Rela *tocrel
9470 = toc_relocs + (skip[val >> 3] >> 2);
9471 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9472
9473 switch (r_type)
9474 {
9475 case R_PPC64_TOC16_HA:
9476 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9477 break;
9478
9479 case R_PPC64_TOC16_LO_DS:
9480 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9481 break;
9482
9483 default:
9484 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9485 ppc_howto_init ();
9486 info->callbacks->einfo
9487 /* xgettext:c-format */
9488 (_("%H: %s references "
9489 "optimized away TOC entry\n"),
9490 ibfd, sec, rel->r_offset,
9491 ppc64_elf_howto_table[r_type]->name);
9492 bfd_set_error (bfd_error_bad_value);
9493 goto error_ret;
9494 }
9495 rel->r_addend = tocrel->r_addend;
9496 elf_section_data (sec)->relocs = relstart;
9497 continue;
9498 }
9499
9500 if (h != NULL || sym->st_value != 0)
9501 continue;
9502
9503 rel->r_addend -= skip[val >> 3];
9504 elf_section_data (sec)->relocs = relstart;
9505 }
9506
9507 if (elf_section_data (sec)->relocs != relstart)
9508 free (relstart);
9509 }
9510
9511 /* We shouldn't have local or global symbols defined in the TOC,
9512 but handle them anyway. */
9513 if (local_syms != NULL)
9514 for (sym = local_syms;
9515 sym < local_syms + symtab_hdr->sh_info;
9516 ++sym)
9517 if (sym->st_value != 0
9518 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9519 {
9520 unsigned long i;
9521
9522 if (sym->st_value > toc->rawsize)
9523 i = toc->rawsize >> 3;
9524 else
9525 i = sym->st_value >> 3;
9526
9527 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9528 {
9529 if (local_toc_syms)
9530 _bfd_error_handler
9531 (_("%s defined on removed toc entry"),
9532 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9533 do
9534 ++i;
9535 while ((skip[i] & (ref_from_discarded | can_optimize)));
9536 sym->st_value = (bfd_vma) i << 3;
9537 }
9538
9539 sym->st_value -= skip[i];
9540 symtab_hdr->contents = (unsigned char *) local_syms;
9541 }
9542
9543 /* Adjust any global syms defined in this toc input section. */
9544 if (toc_inf.global_toc_syms)
9545 {
9546 toc_inf.toc = toc;
9547 toc_inf.skip = skip;
9548 toc_inf.global_toc_syms = FALSE;
9549 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9550 &toc_inf);
9551 }
9552
9553 if (toc->reloc_count != 0)
9554 {
9555 Elf_Internal_Shdr *rel_hdr;
9556 Elf_Internal_Rela *wrel;
9557 bfd_size_type sz;
9558
9559 /* Remove unused toc relocs, and adjust those we keep. */
9560 if (toc_relocs == NULL)
9561 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9562 info->keep_memory);
9563 if (toc_relocs == NULL)
9564 goto error_ret;
9565
9566 wrel = toc_relocs;
9567 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9568 if ((skip[rel->r_offset >> 3]
9569 & (ref_from_discarded | can_optimize)) == 0)
9570 {
9571 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9572 wrel->r_info = rel->r_info;
9573 wrel->r_addend = rel->r_addend;
9574 ++wrel;
9575 }
9576 else if (!dec_dynrel_count (rel->r_info, toc, info,
9577 &local_syms, NULL, NULL))
9578 goto error_ret;
9579
9580 elf_section_data (toc)->relocs = toc_relocs;
9581 toc->reloc_count = wrel - toc_relocs;
9582 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9583 sz = rel_hdr->sh_entsize;
9584 rel_hdr->sh_size = toc->reloc_count * sz;
9585 }
9586 }
9587 else if (toc_relocs != NULL
9588 && elf_section_data (toc)->relocs != toc_relocs)
9589 free (toc_relocs);
9590
9591 if (local_syms != NULL
9592 && symtab_hdr->contents != (unsigned char *) local_syms)
9593 {
9594 if (!info->keep_memory)
9595 free (local_syms);
9596 else
9597 symtab_hdr->contents = (unsigned char *) local_syms;
9598 }
9599 free (skip);
9600 }
9601
9602 return TRUE;
9603 }
9604
9605 /* Return true iff input section I references the TOC using
9606 instructions limited to +/-32k offsets. */
9607
9608 bfd_boolean
9609 ppc64_elf_has_small_toc_reloc (asection *i)
9610 {
9611 return (is_ppc64_elf (i->owner)
9612 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9613 }
9614
9615 /* Allocate space for one GOT entry. */
9616
9617 static void
9618 allocate_got (struct elf_link_hash_entry *h,
9619 struct bfd_link_info *info,
9620 struct got_entry *gent)
9621 {
9622 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9623 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9624 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9625 ? 16 : 8);
9626 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9627 ? 2 : 1) * sizeof (Elf64_External_Rela);
9628 asection *got = ppc64_elf_tdata (gent->owner)->got;
9629
9630 gent->got.offset = got->size;
9631 got->size += entsize;
9632
9633 if (h->type == STT_GNU_IFUNC)
9634 {
9635 htab->elf.irelplt->size += rentsize;
9636 htab->got_reli_size += rentsize;
9637 }
9638 else if ((bfd_link_pic (info)
9639 || (htab->elf.dynamic_sections_created
9640 && h->dynindx != -1
9641 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9642 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9643 || h->root.type != bfd_link_hash_undefweak))
9644 {
9645 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9646 relgot->size += rentsize;
9647 }
9648 }
9649
9650 /* This function merges got entries in the same toc group. */
9651
9652 static void
9653 merge_got_entries (struct got_entry **pent)
9654 {
9655 struct got_entry *ent, *ent2;
9656
9657 for (ent = *pent; ent != NULL; ent = ent->next)
9658 if (!ent->is_indirect)
9659 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9660 if (!ent2->is_indirect
9661 && ent2->addend == ent->addend
9662 && ent2->tls_type == ent->tls_type
9663 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9664 {
9665 ent2->is_indirect = TRUE;
9666 ent2->got.ent = ent;
9667 }
9668 }
9669
9670 /* If H is undefined weak, make it dynamic if that makes sense. */
9671
9672 static bfd_boolean
9673 ensure_undefweak_dynamic (struct bfd_link_info *info,
9674 struct elf_link_hash_entry *h)
9675 {
9676 struct elf_link_hash_table *htab = elf_hash_table (info);
9677
9678 if (htab->dynamic_sections_created
9679 && h->root.type == bfd_link_hash_undefweak
9680 && h->dynindx == -1
9681 && !h->forced_local
9682 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9683 return bfd_elf_link_record_dynamic_symbol (info, h);
9684 return TRUE;
9685 }
9686
9687 /* Allocate space in .plt, .got and associated reloc sections for
9688 dynamic relocs. */
9689
9690 static bfd_boolean
9691 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9692 {
9693 struct bfd_link_info *info;
9694 struct ppc_link_hash_table *htab;
9695 asection *s;
9696 struct ppc_link_hash_entry *eh;
9697 struct got_entry **pgent, *gent;
9698
9699 if (h->root.type == bfd_link_hash_indirect)
9700 return TRUE;
9701
9702 info = (struct bfd_link_info *) inf;
9703 htab = ppc_hash_table (info);
9704 if (htab == NULL)
9705 return FALSE;
9706
9707 eh = (struct ppc_link_hash_entry *) h;
9708 /* Run through the TLS GD got entries first if we're changing them
9709 to TPREL. */
9710 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9711 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9712 if (gent->got.refcount > 0
9713 && (gent->tls_type & TLS_GD) != 0)
9714 {
9715 /* This was a GD entry that has been converted to TPREL. If
9716 there happens to be a TPREL entry we can use that one. */
9717 struct got_entry *ent;
9718 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9719 if (ent->got.refcount > 0
9720 && (ent->tls_type & TLS_TPREL) != 0
9721 && ent->addend == gent->addend
9722 && ent->owner == gent->owner)
9723 {
9724 gent->got.refcount = 0;
9725 break;
9726 }
9727
9728 /* If not, then we'll be using our own TPREL entry. */
9729 if (gent->got.refcount != 0)
9730 gent->tls_type = TLS_TLS | TLS_TPREL;
9731 }
9732
9733 /* Remove any list entry that won't generate a word in the GOT before
9734 we call merge_got_entries. Otherwise we risk merging to empty
9735 entries. */
9736 pgent = &h->got.glist;
9737 while ((gent = *pgent) != NULL)
9738 if (gent->got.refcount > 0)
9739 {
9740 if ((gent->tls_type & TLS_LD) != 0
9741 && !h->def_dynamic)
9742 {
9743 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9744 *pgent = gent->next;
9745 }
9746 else
9747 pgent = &gent->next;
9748 }
9749 else
9750 *pgent = gent->next;
9751
9752 if (!htab->do_multi_toc)
9753 merge_got_entries (&h->got.glist);
9754
9755 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9756 if (!gent->is_indirect)
9757 {
9758 /* Make sure this symbol is output as a dynamic symbol.
9759 Undefined weak syms won't yet be marked as dynamic. */
9760 if (!ensure_undefweak_dynamic (info, h))
9761 return FALSE;
9762
9763 if (!is_ppc64_elf (gent->owner))
9764 abort ();
9765
9766 allocate_got (h, info, gent);
9767 }
9768
9769 if (!htab->elf.dynamic_sections_created
9770 && h->type != STT_GNU_IFUNC)
9771 eh->dyn_relocs = NULL;
9772
9773 if (eh->dyn_relocs != NULL)
9774 {
9775 struct elf_dyn_relocs *p, **pp;
9776
9777 /* In the shared -Bsymbolic case, discard space allocated for
9778 dynamic pc-relative relocs against symbols which turn out to
9779 be defined in regular objects. For the normal shared case,
9780 discard space for relocs that have become local due to symbol
9781 visibility changes. */
9782
9783 if (bfd_link_pic (info))
9784 {
9785 /* Relocs that use pc_count are those that appear on a call
9786 insn, or certain REL relocs (see must_be_dyn_reloc) that
9787 can be generated via assembly. We want calls to
9788 protected symbols to resolve directly to the function
9789 rather than going via the plt. If people want function
9790 pointer comparisons to work as expected then they should
9791 avoid writing weird assembly. */
9792 if (SYMBOL_CALLS_LOCAL (info, h))
9793 {
9794 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9795 {
9796 p->count -= p->pc_count;
9797 p->pc_count = 0;
9798 if (p->count == 0)
9799 *pp = p->next;
9800 else
9801 pp = &p->next;
9802 }
9803 }
9804
9805 /* Also discard relocs on undefined weak syms with
9806 non-default visibility. */
9807 if (eh->dyn_relocs != NULL
9808 && h->root.type == bfd_link_hash_undefweak)
9809 {
9810 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9811 eh->dyn_relocs = NULL;
9812
9813 /* Make sure this symbol is output as a dynamic symbol.
9814 Undefined weak syms won't yet be marked as dynamic. */
9815 else if (!ensure_undefweak_dynamic (info, h))
9816 return FALSE;
9817 }
9818 }
9819 else if (h->type == STT_GNU_IFUNC)
9820 {
9821 /* A plt entry is always created when making direct calls to
9822 an ifunc, even when building a static executable, but
9823 that doesn't cover all cases. We may have only an ifunc
9824 initialised function pointer for a given ifunc symbol.
9825
9826 For ELFv2, dynamic relocations are not required when
9827 generating a global entry PLT stub. */
9828 if (abiversion (info->output_bfd) >= 2)
9829 {
9830 if (global_entry_stub (h))
9831 eh->dyn_relocs = NULL;
9832 }
9833
9834 /* For ELFv1 we have function descriptors. Descriptors need
9835 to be treated like PLT entries and thus have dynamic
9836 relocations. One exception is when the function
9837 descriptor is copied into .dynbss (which should only
9838 happen with ancient versions of gcc). */
9839 else if (h->needs_copy)
9840 eh->dyn_relocs = NULL;
9841 }
9842 else if (ELIMINATE_COPY_RELOCS)
9843 {
9844 /* For the non-pic case, discard space for relocs against
9845 symbols which turn out to need copy relocs or are not
9846 dynamic. */
9847 if (!h->non_got_ref
9848 && !h->def_regular)
9849 {
9850 /* Make sure this symbol is output as a dynamic symbol.
9851 Undefined weak syms won't yet be marked as dynamic. */
9852 if (!ensure_undefweak_dynamic (info, h))
9853 return FALSE;
9854
9855 if (h->dynindx == -1)
9856 eh->dyn_relocs = NULL;
9857 }
9858 else
9859 eh->dyn_relocs = NULL;
9860 }
9861
9862 /* Finally, allocate space. */
9863 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9864 {
9865 asection *sreloc = elf_section_data (p->sec)->sreloc;
9866 if (eh->elf.type == STT_GNU_IFUNC)
9867 sreloc = htab->elf.irelplt;
9868 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9869 }
9870 }
9871
9872 if ((htab->elf.dynamic_sections_created
9873 && h->dynindx != -1)
9874 || h->type == STT_GNU_IFUNC)
9875 {
9876 struct plt_entry *pent;
9877 bfd_boolean doneone = FALSE;
9878 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9879 if (pent->plt.refcount > 0)
9880 {
9881 if (!htab->elf.dynamic_sections_created
9882 || h->dynindx == -1)
9883 {
9884 s = htab->elf.iplt;
9885 pent->plt.offset = s->size;
9886 s->size += PLT_ENTRY_SIZE (htab);
9887 s = htab->elf.irelplt;
9888 }
9889 else
9890 {
9891 /* If this is the first .plt entry, make room for the special
9892 first entry. */
9893 s = htab->elf.splt;
9894 if (s->size == 0)
9895 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9896
9897 pent->plt.offset = s->size;
9898
9899 /* Make room for this entry. */
9900 s->size += PLT_ENTRY_SIZE (htab);
9901
9902 /* Make room for the .glink code. */
9903 s = htab->glink;
9904 if (s->size == 0)
9905 s->size += GLINK_CALL_STUB_SIZE;
9906 if (htab->opd_abi)
9907 {
9908 /* We need bigger stubs past index 32767. */
9909 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9910 s->size += 4;
9911 s->size += 2*4;
9912 }
9913 else
9914 s->size += 4;
9915
9916 /* We also need to make an entry in the .rela.plt section. */
9917 s = htab->elf.srelplt;
9918 }
9919 s->size += sizeof (Elf64_External_Rela);
9920 doneone = TRUE;
9921 }
9922 else
9923 pent->plt.offset = (bfd_vma) -1;
9924 if (!doneone)
9925 {
9926 h->plt.plist = NULL;
9927 h->needs_plt = 0;
9928 }
9929 }
9930 else
9931 {
9932 h->plt.plist = NULL;
9933 h->needs_plt = 0;
9934 }
9935
9936 return TRUE;
9937 }
9938
9939 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9940 to set up space for global entry stubs. These are put in glink,
9941 after the branch table. */
9942
9943 static bfd_boolean
9944 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9945 {
9946 struct bfd_link_info *info;
9947 struct ppc_link_hash_table *htab;
9948 struct plt_entry *pent;
9949 asection *s;
9950
9951 if (h->root.type == bfd_link_hash_indirect)
9952 return TRUE;
9953
9954 if (!h->pointer_equality_needed)
9955 return TRUE;
9956
9957 if (h->def_regular)
9958 return TRUE;
9959
9960 info = inf;
9961 htab = ppc_hash_table (info);
9962 if (htab == NULL)
9963 return FALSE;
9964
9965 s = htab->glink;
9966 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9967 if (pent->plt.offset != (bfd_vma) -1
9968 && pent->addend == 0)
9969 {
9970 /* For ELFv2, if this symbol is not defined in a regular file
9971 and we are not generating a shared library or pie, then we
9972 need to define the symbol in the executable on a call stub.
9973 This is to avoid text relocations. */
9974 s->size = (s->size + 15) & -16;
9975 h->root.type = bfd_link_hash_defined;
9976 h->root.u.def.section = s;
9977 h->root.u.def.value = s->size;
9978 s->size += 16;
9979 break;
9980 }
9981 return TRUE;
9982 }
9983
9984 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9985 read-only sections. */
9986
9987 static bfd_boolean
9988 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9989 {
9990 if (h->root.type == bfd_link_hash_indirect)
9991 return TRUE;
9992
9993 if (readonly_dynrelocs (h))
9994 {
9995 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9996
9997 /* Not an error, just cut short the traversal. */
9998 return FALSE;
9999 }
10000 return TRUE;
10001 }
10002
10003 /* Set the sizes of the dynamic sections. */
10004
10005 static bfd_boolean
10006 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10007 struct bfd_link_info *info)
10008 {
10009 struct ppc_link_hash_table *htab;
10010 bfd *dynobj;
10011 asection *s;
10012 bfd_boolean relocs;
10013 bfd *ibfd;
10014 struct got_entry *first_tlsld;
10015
10016 htab = ppc_hash_table (info);
10017 if (htab == NULL)
10018 return FALSE;
10019
10020 dynobj = htab->elf.dynobj;
10021 if (dynobj == NULL)
10022 abort ();
10023
10024 if (htab->elf.dynamic_sections_created)
10025 {
10026 /* Set the contents of the .interp section to the interpreter. */
10027 if (bfd_link_executable (info) && !info->nointerp)
10028 {
10029 s = bfd_get_linker_section (dynobj, ".interp");
10030 if (s == NULL)
10031 abort ();
10032 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10033 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10034 }
10035 }
10036
10037 /* Set up .got offsets for local syms, and space for local dynamic
10038 relocs. */
10039 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10040 {
10041 struct got_entry **lgot_ents;
10042 struct got_entry **end_lgot_ents;
10043 struct plt_entry **local_plt;
10044 struct plt_entry **end_local_plt;
10045 unsigned char *lgot_masks;
10046 bfd_size_type locsymcount;
10047 Elf_Internal_Shdr *symtab_hdr;
10048
10049 if (!is_ppc64_elf (ibfd))
10050 continue;
10051
10052 for (s = ibfd->sections; s != NULL; s = s->next)
10053 {
10054 struct ppc_dyn_relocs *p;
10055
10056 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10057 {
10058 if (!bfd_is_abs_section (p->sec)
10059 && bfd_is_abs_section (p->sec->output_section))
10060 {
10061 /* Input section has been discarded, either because
10062 it is a copy of a linkonce section or due to
10063 linker script /DISCARD/, so we'll be discarding
10064 the relocs too. */
10065 }
10066 else if (p->count != 0)
10067 {
10068 asection *srel = elf_section_data (p->sec)->sreloc;
10069 if (p->ifunc)
10070 srel = htab->elf.irelplt;
10071 srel->size += p->count * sizeof (Elf64_External_Rela);
10072 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10073 info->flags |= DF_TEXTREL;
10074 }
10075 }
10076 }
10077
10078 lgot_ents = elf_local_got_ents (ibfd);
10079 if (!lgot_ents)
10080 continue;
10081
10082 symtab_hdr = &elf_symtab_hdr (ibfd);
10083 locsymcount = symtab_hdr->sh_info;
10084 end_lgot_ents = lgot_ents + locsymcount;
10085 local_plt = (struct plt_entry **) end_lgot_ents;
10086 end_local_plt = local_plt + locsymcount;
10087 lgot_masks = (unsigned char *) end_local_plt;
10088 s = ppc64_elf_tdata (ibfd)->got;
10089 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10090 {
10091 struct got_entry **pent, *ent;
10092
10093 pent = lgot_ents;
10094 while ((ent = *pent) != NULL)
10095 if (ent->got.refcount > 0)
10096 {
10097 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10098 {
10099 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10100 *pent = ent->next;
10101 }
10102 else
10103 {
10104 unsigned int ent_size = 8;
10105 unsigned int rel_size = sizeof (Elf64_External_Rela);
10106
10107 ent->got.offset = s->size;
10108 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10109 {
10110 ent_size *= 2;
10111 rel_size *= 2;
10112 }
10113 s->size += ent_size;
10114 if ((*lgot_masks & PLT_IFUNC) != 0)
10115 {
10116 htab->elf.irelplt->size += rel_size;
10117 htab->got_reli_size += rel_size;
10118 }
10119 else if (bfd_link_pic (info))
10120 {
10121 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10122 srel->size += rel_size;
10123 }
10124 pent = &ent->next;
10125 }
10126 }
10127 else
10128 *pent = ent->next;
10129 }
10130
10131 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10132 for (; local_plt < end_local_plt; ++local_plt)
10133 {
10134 struct plt_entry *ent;
10135
10136 for (ent = *local_plt; ent != NULL; ent = ent->next)
10137 if (ent->plt.refcount > 0)
10138 {
10139 s = htab->elf.iplt;
10140 ent->plt.offset = s->size;
10141 s->size += PLT_ENTRY_SIZE (htab);
10142
10143 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10144 }
10145 else
10146 ent->plt.offset = (bfd_vma) -1;
10147 }
10148 }
10149
10150 /* Allocate global sym .plt and .got entries, and space for global
10151 sym dynamic relocs. */
10152 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10153 /* Stash the end of glink branch table. */
10154 if (htab->glink != NULL)
10155 htab->glink->rawsize = htab->glink->size;
10156
10157 if (!htab->opd_abi && !bfd_link_pic (info))
10158 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10159
10160 first_tlsld = NULL;
10161 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10162 {
10163 struct got_entry *ent;
10164
10165 if (!is_ppc64_elf (ibfd))
10166 continue;
10167
10168 ent = ppc64_tlsld_got (ibfd);
10169 if (ent->got.refcount > 0)
10170 {
10171 if (!htab->do_multi_toc && first_tlsld != NULL)
10172 {
10173 ent->is_indirect = TRUE;
10174 ent->got.ent = first_tlsld;
10175 }
10176 else
10177 {
10178 if (first_tlsld == NULL)
10179 first_tlsld = ent;
10180 s = ppc64_elf_tdata (ibfd)->got;
10181 ent->got.offset = s->size;
10182 ent->owner = ibfd;
10183 s->size += 16;
10184 if (bfd_link_pic (info))
10185 {
10186 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10187 srel->size += sizeof (Elf64_External_Rela);
10188 }
10189 }
10190 }
10191 else
10192 ent->got.offset = (bfd_vma) -1;
10193 }
10194
10195 /* We now have determined the sizes of the various dynamic sections.
10196 Allocate memory for them. */
10197 relocs = FALSE;
10198 for (s = dynobj->sections; s != NULL; s = s->next)
10199 {
10200 if ((s->flags & SEC_LINKER_CREATED) == 0)
10201 continue;
10202
10203 if (s == htab->brlt || s == htab->relbrlt)
10204 /* These haven't been allocated yet; don't strip. */
10205 continue;
10206 else if (s == htab->elf.sgot
10207 || s == htab->elf.splt
10208 || s == htab->elf.iplt
10209 || s == htab->glink
10210 || s == htab->elf.sdynbss
10211 || s == htab->elf.sdynrelro)
10212 {
10213 /* Strip this section if we don't need it; see the
10214 comment below. */
10215 }
10216 else if (s == htab->glink_eh_frame)
10217 {
10218 if (!bfd_is_abs_section (s->output_section))
10219 /* Not sized yet. */
10220 continue;
10221 }
10222 else if (CONST_STRNEQ (s->name, ".rela"))
10223 {
10224 if (s->size != 0)
10225 {
10226 if (s != htab->elf.srelplt)
10227 relocs = TRUE;
10228
10229 /* We use the reloc_count field as a counter if we need
10230 to copy relocs into the output file. */
10231 s->reloc_count = 0;
10232 }
10233 }
10234 else
10235 {
10236 /* It's not one of our sections, so don't allocate space. */
10237 continue;
10238 }
10239
10240 if (s->size == 0)
10241 {
10242 /* If we don't need this section, strip it from the
10243 output file. This is mostly to handle .rela.bss and
10244 .rela.plt. We must create both sections in
10245 create_dynamic_sections, because they must be created
10246 before the linker maps input sections to output
10247 sections. The linker does that before
10248 adjust_dynamic_symbol is called, and it is that
10249 function which decides whether anything needs to go
10250 into these sections. */
10251 s->flags |= SEC_EXCLUDE;
10252 continue;
10253 }
10254
10255 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10256 continue;
10257
10258 /* Allocate memory for the section contents. We use bfd_zalloc
10259 here in case unused entries are not reclaimed before the
10260 section's contents are written out. This should not happen,
10261 but this way if it does we get a R_PPC64_NONE reloc in .rela
10262 sections instead of garbage.
10263 We also rely on the section contents being zero when writing
10264 the GOT and .dynrelro. */
10265 s->contents = bfd_zalloc (dynobj, s->size);
10266 if (s->contents == NULL)
10267 return FALSE;
10268 }
10269
10270 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10271 {
10272 if (!is_ppc64_elf (ibfd))
10273 continue;
10274
10275 s = ppc64_elf_tdata (ibfd)->got;
10276 if (s != NULL && s != htab->elf.sgot)
10277 {
10278 if (s->size == 0)
10279 s->flags |= SEC_EXCLUDE;
10280 else
10281 {
10282 s->contents = bfd_zalloc (ibfd, s->size);
10283 if (s->contents == NULL)
10284 return FALSE;
10285 }
10286 }
10287 s = ppc64_elf_tdata (ibfd)->relgot;
10288 if (s != NULL)
10289 {
10290 if (s->size == 0)
10291 s->flags |= SEC_EXCLUDE;
10292 else
10293 {
10294 s->contents = bfd_zalloc (ibfd, s->size);
10295 if (s->contents == NULL)
10296 return FALSE;
10297 relocs = TRUE;
10298 s->reloc_count = 0;
10299 }
10300 }
10301 }
10302
10303 if (htab->elf.dynamic_sections_created)
10304 {
10305 bfd_boolean tls_opt;
10306
10307 /* Add some entries to the .dynamic section. We fill in the
10308 values later, in ppc64_elf_finish_dynamic_sections, but we
10309 must add the entries now so that we get the correct size for
10310 the .dynamic section. The DT_DEBUG entry is filled in by the
10311 dynamic linker and used by the debugger. */
10312 #define add_dynamic_entry(TAG, VAL) \
10313 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10314
10315 if (bfd_link_executable (info))
10316 {
10317 if (!add_dynamic_entry (DT_DEBUG, 0))
10318 return FALSE;
10319 }
10320
10321 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10322 {
10323 if (!add_dynamic_entry (DT_PLTGOT, 0)
10324 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10325 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10326 || !add_dynamic_entry (DT_JMPREL, 0)
10327 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10328 return FALSE;
10329 }
10330
10331 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10332 {
10333 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10334 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10335 return FALSE;
10336 }
10337
10338 tls_opt = (htab->params->tls_get_addr_opt
10339 && htab->tls_get_addr_fd != NULL
10340 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10341 if (tls_opt || !htab->opd_abi)
10342 {
10343 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10344 return FALSE;
10345 }
10346
10347 if (relocs)
10348 {
10349 if (!add_dynamic_entry (DT_RELA, 0)
10350 || !add_dynamic_entry (DT_RELASZ, 0)
10351 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10352 return FALSE;
10353
10354 /* If any dynamic relocs apply to a read-only section,
10355 then we need a DT_TEXTREL entry. */
10356 if ((info->flags & DF_TEXTREL) == 0)
10357 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10358
10359 if ((info->flags & DF_TEXTREL) != 0)
10360 {
10361 if (!add_dynamic_entry (DT_TEXTREL, 0))
10362 return FALSE;
10363 }
10364 }
10365 }
10366 #undef add_dynamic_entry
10367
10368 return TRUE;
10369 }
10370
10371 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10372
10373 static bfd_boolean
10374 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10375 {
10376 if (h->plt.plist != NULL
10377 && !h->def_regular
10378 && !h->pointer_equality_needed)
10379 return FALSE;
10380
10381 return _bfd_elf_hash_symbol (h);
10382 }
10383
10384 /* Determine the type of stub needed, if any, for a call. */
10385
10386 static inline enum ppc_stub_type
10387 ppc_type_of_stub (asection *input_sec,
10388 const Elf_Internal_Rela *rel,
10389 struct ppc_link_hash_entry **hash,
10390 struct plt_entry **plt_ent,
10391 bfd_vma destination,
10392 unsigned long local_off)
10393 {
10394 struct ppc_link_hash_entry *h = *hash;
10395 bfd_vma location;
10396 bfd_vma branch_offset;
10397 bfd_vma max_branch_offset;
10398 enum elf_ppc64_reloc_type r_type;
10399
10400 if (h != NULL)
10401 {
10402 struct plt_entry *ent;
10403 struct ppc_link_hash_entry *fdh = h;
10404 if (h->oh != NULL
10405 && h->oh->is_func_descriptor)
10406 {
10407 fdh = ppc_follow_link (h->oh);
10408 *hash = fdh;
10409 }
10410
10411 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10412 if (ent->addend == rel->r_addend
10413 && ent->plt.offset != (bfd_vma) -1)
10414 {
10415 *plt_ent = ent;
10416 return ppc_stub_plt_call;
10417 }
10418
10419 /* Here, we know we don't have a plt entry. If we don't have a
10420 either a defined function descriptor or a defined entry symbol
10421 in a regular object file, then it is pointless trying to make
10422 any other type of stub. */
10423 if (!is_static_defined (&fdh->elf)
10424 && !is_static_defined (&h->elf))
10425 return ppc_stub_none;
10426 }
10427 else if (elf_local_got_ents (input_sec->owner) != NULL)
10428 {
10429 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10430 struct plt_entry **local_plt = (struct plt_entry **)
10431 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10432 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10433
10434 if (local_plt[r_symndx] != NULL)
10435 {
10436 struct plt_entry *ent;
10437
10438 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10439 if (ent->addend == rel->r_addend
10440 && ent->plt.offset != (bfd_vma) -1)
10441 {
10442 *plt_ent = ent;
10443 return ppc_stub_plt_call;
10444 }
10445 }
10446 }
10447
10448 /* Determine where the call point is. */
10449 location = (input_sec->output_offset
10450 + input_sec->output_section->vma
10451 + rel->r_offset);
10452
10453 branch_offset = destination - location;
10454 r_type = ELF64_R_TYPE (rel->r_info);
10455
10456 /* Determine if a long branch stub is needed. */
10457 max_branch_offset = 1 << 25;
10458 if (r_type != R_PPC64_REL24)
10459 max_branch_offset = 1 << 15;
10460
10461 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10462 /* We need a stub. Figure out whether a long_branch or plt_branch
10463 is needed later. */
10464 return ppc_stub_long_branch;
10465
10466 return ppc_stub_none;
10467 }
10468
10469 /* With power7 weakly ordered memory model, it is possible for ld.so
10470 to update a plt entry in one thread and have another thread see a
10471 stale zero toc entry. To avoid this we need some sort of acquire
10472 barrier in the call stub. One solution is to make the load of the
10473 toc word seem to appear to depend on the load of the function entry
10474 word. Another solution is to test for r2 being zero, and branch to
10475 the appropriate glink entry if so.
10476
10477 . fake dep barrier compare
10478 . ld 12,xxx(2) ld 12,xxx(2)
10479 . mtctr 12 mtctr 12
10480 . xor 11,12,12 ld 2,xxx+8(2)
10481 . add 2,2,11 cmpldi 2,0
10482 . ld 2,xxx+8(2) bnectr+
10483 . bctr b <glink_entry>
10484
10485 The solution involving the compare turns out to be faster, so
10486 that's what we use unless the branch won't reach. */
10487
10488 #define ALWAYS_USE_FAKE_DEP 0
10489 #define ALWAYS_EMIT_R2SAVE 0
10490
10491 #define PPC_LO(v) ((v) & 0xffff)
10492 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10493 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10494
10495 static inline unsigned int
10496 plt_stub_size (struct ppc_link_hash_table *htab,
10497 struct ppc_stub_hash_entry *stub_entry,
10498 bfd_vma off)
10499 {
10500 unsigned size = 12;
10501
10502 if (ALWAYS_EMIT_R2SAVE
10503 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10504 size += 4;
10505 if (PPC_HA (off) != 0)
10506 size += 4;
10507 if (htab->opd_abi)
10508 {
10509 size += 4;
10510 if (htab->params->plt_static_chain)
10511 size += 4;
10512 if (htab->params->plt_thread_safe
10513 && htab->elf.dynamic_sections_created
10514 && stub_entry->h != NULL
10515 && stub_entry->h->elf.dynindx != -1)
10516 size += 8;
10517 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10518 size += 4;
10519 }
10520 if (stub_entry->h != NULL
10521 && (stub_entry->h == htab->tls_get_addr_fd
10522 || stub_entry->h == htab->tls_get_addr)
10523 && htab->params->tls_get_addr_opt)
10524 size += 13 * 4;
10525 return size;
10526 }
10527
10528 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10529 then return the padding needed to do so. */
10530 static inline unsigned int
10531 plt_stub_pad (struct ppc_link_hash_table *htab,
10532 struct ppc_stub_hash_entry *stub_entry,
10533 bfd_vma plt_off)
10534 {
10535 int stub_align = 1 << htab->params->plt_stub_align;
10536 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10537 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10538
10539 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10540 > ((stub_size - 1) & -stub_align))
10541 return stub_align - (stub_off & (stub_align - 1));
10542 return 0;
10543 }
10544
10545 /* Build a .plt call stub. */
10546
10547 static inline bfd_byte *
10548 build_plt_stub (struct ppc_link_hash_table *htab,
10549 struct ppc_stub_hash_entry *stub_entry,
10550 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10551 {
10552 bfd *obfd = htab->params->stub_bfd;
10553 bfd_boolean plt_load_toc = htab->opd_abi;
10554 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10555 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10556 && htab->elf.dynamic_sections_created
10557 && stub_entry->h != NULL
10558 && stub_entry->h->elf.dynindx != -1);
10559 bfd_boolean use_fake_dep = plt_thread_safe;
10560 bfd_vma cmp_branch_off = 0;
10561
10562 if (!ALWAYS_USE_FAKE_DEP
10563 && plt_load_toc
10564 && plt_thread_safe
10565 && !((stub_entry->h == htab->tls_get_addr_fd
10566 || stub_entry->h == htab->tls_get_addr)
10567 && htab->params->tls_get_addr_opt))
10568 {
10569 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10570 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10571 / PLT_ENTRY_SIZE (htab));
10572 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10573 bfd_vma to, from;
10574
10575 if (pltindex > 32768)
10576 glinkoff += (pltindex - 32768) * 4;
10577 to = (glinkoff
10578 + htab->glink->output_offset
10579 + htab->glink->output_section->vma);
10580 from = (p - stub_entry->group->stub_sec->contents
10581 + 4 * (ALWAYS_EMIT_R2SAVE
10582 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10583 + 4 * (PPC_HA (offset) != 0)
10584 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10585 != PPC_HA (offset))
10586 + 4 * (plt_static_chain != 0)
10587 + 20
10588 + stub_entry->group->stub_sec->output_offset
10589 + stub_entry->group->stub_sec->output_section->vma);
10590 cmp_branch_off = to - from;
10591 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10592 }
10593
10594 if (PPC_HA (offset) != 0)
10595 {
10596 if (r != NULL)
10597 {
10598 if (ALWAYS_EMIT_R2SAVE
10599 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10600 r[0].r_offset += 4;
10601 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10602 r[1].r_offset = r[0].r_offset + 4;
10603 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10604 r[1].r_addend = r[0].r_addend;
10605 if (plt_load_toc)
10606 {
10607 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10608 {
10609 r[2].r_offset = r[1].r_offset + 4;
10610 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10611 r[2].r_addend = r[0].r_addend;
10612 }
10613 else
10614 {
10615 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10616 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10617 r[2].r_addend = r[0].r_addend + 8;
10618 if (plt_static_chain)
10619 {
10620 r[3].r_offset = r[2].r_offset + 4;
10621 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10622 r[3].r_addend = r[0].r_addend + 16;
10623 }
10624 }
10625 }
10626 }
10627 if (ALWAYS_EMIT_R2SAVE
10628 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10629 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10630 if (plt_load_toc)
10631 {
10632 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10633 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10634 }
10635 else
10636 {
10637 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10638 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10639 }
10640 if (plt_load_toc
10641 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10642 {
10643 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10644 offset = 0;
10645 }
10646 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10647 if (plt_load_toc)
10648 {
10649 if (use_fake_dep)
10650 {
10651 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10652 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10653 }
10654 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10655 if (plt_static_chain)
10656 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10657 }
10658 }
10659 else
10660 {
10661 if (r != NULL)
10662 {
10663 if (ALWAYS_EMIT_R2SAVE
10664 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10665 r[0].r_offset += 4;
10666 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10667 if (plt_load_toc)
10668 {
10669 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10670 {
10671 r[1].r_offset = r[0].r_offset + 4;
10672 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10673 r[1].r_addend = r[0].r_addend;
10674 }
10675 else
10676 {
10677 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10678 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10679 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10680 if (plt_static_chain)
10681 {
10682 r[2].r_offset = r[1].r_offset + 4;
10683 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10684 r[2].r_addend = r[0].r_addend + 8;
10685 }
10686 }
10687 }
10688 }
10689 if (ALWAYS_EMIT_R2SAVE
10690 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10691 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10692 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10693 if (plt_load_toc
10694 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10695 {
10696 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10697 offset = 0;
10698 }
10699 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10700 if (plt_load_toc)
10701 {
10702 if (use_fake_dep)
10703 {
10704 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10705 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10706 }
10707 if (plt_static_chain)
10708 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10709 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10710 }
10711 }
10712 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10713 {
10714 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10715 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10716 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10717 }
10718 else
10719 bfd_put_32 (obfd, BCTR, p), p += 4;
10720 return p;
10721 }
10722
10723 /* Build a special .plt call stub for __tls_get_addr. */
10724
10725 #define LD_R11_0R3 0xe9630000
10726 #define LD_R12_0R3 0xe9830000
10727 #define MR_R0_R3 0x7c601b78
10728 #define CMPDI_R11_0 0x2c2b0000
10729 #define ADD_R3_R12_R13 0x7c6c6a14
10730 #define BEQLR 0x4d820020
10731 #define MR_R3_R0 0x7c030378
10732 #define STD_R11_0R1 0xf9610000
10733 #define BCTRL 0x4e800421
10734 #define LD_R11_0R1 0xe9610000
10735 #define MTLR_R11 0x7d6803a6
10736
10737 static inline bfd_byte *
10738 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10739 struct ppc_stub_hash_entry *stub_entry,
10740 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10741 {
10742 bfd *obfd = htab->params->stub_bfd;
10743
10744 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10745 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10746 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10747 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10748 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10749 bfd_put_32 (obfd, BEQLR, p), p += 4;
10750 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10751 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10752 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10753
10754 if (r != NULL)
10755 r[0].r_offset += 9 * 4;
10756 p = build_plt_stub (htab, stub_entry, p, offset, r);
10757 bfd_put_32 (obfd, BCTRL, p - 4);
10758
10759 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10760 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10761 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10762 bfd_put_32 (obfd, BLR, p), p += 4;
10763
10764 return p;
10765 }
10766
10767 static Elf_Internal_Rela *
10768 get_relocs (asection *sec, int count)
10769 {
10770 Elf_Internal_Rela *relocs;
10771 struct bfd_elf_section_data *elfsec_data;
10772
10773 elfsec_data = elf_section_data (sec);
10774 relocs = elfsec_data->relocs;
10775 if (relocs == NULL)
10776 {
10777 bfd_size_type relsize;
10778 relsize = sec->reloc_count * sizeof (*relocs);
10779 relocs = bfd_alloc (sec->owner, relsize);
10780 if (relocs == NULL)
10781 return NULL;
10782 elfsec_data->relocs = relocs;
10783 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10784 sizeof (Elf_Internal_Shdr));
10785 if (elfsec_data->rela.hdr == NULL)
10786 return NULL;
10787 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10788 * sizeof (Elf64_External_Rela));
10789 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10790 sec->reloc_count = 0;
10791 }
10792 relocs += sec->reloc_count;
10793 sec->reloc_count += count;
10794 return relocs;
10795 }
10796
10797 static bfd_vma
10798 get_r2off (struct bfd_link_info *info,
10799 struct ppc_stub_hash_entry *stub_entry)
10800 {
10801 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10802 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10803
10804 if (r2off == 0)
10805 {
10806 /* Support linking -R objects. Get the toc pointer from the
10807 opd entry. */
10808 char buf[8];
10809 if (!htab->opd_abi)
10810 return r2off;
10811 asection *opd = stub_entry->h->elf.root.u.def.section;
10812 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10813
10814 if (strcmp (opd->name, ".opd") != 0
10815 || opd->reloc_count != 0)
10816 {
10817 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10818 stub_entry->h->elf.root.root.string);
10819 bfd_set_error (bfd_error_bad_value);
10820 return (bfd_vma) -1;
10821 }
10822 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10823 return (bfd_vma) -1;
10824 r2off = bfd_get_64 (opd->owner, buf);
10825 r2off -= elf_gp (info->output_bfd);
10826 }
10827 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10828 return r2off;
10829 }
10830
10831 static bfd_boolean
10832 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10833 {
10834 struct ppc_stub_hash_entry *stub_entry;
10835 struct ppc_branch_hash_entry *br_entry;
10836 struct bfd_link_info *info;
10837 struct ppc_link_hash_table *htab;
10838 bfd_byte *loc;
10839 bfd_byte *p;
10840 bfd_vma dest, off;
10841 int size;
10842 Elf_Internal_Rela *r;
10843 asection *plt;
10844
10845 /* Massage our args to the form they really have. */
10846 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10847 info = in_arg;
10848
10849 htab = ppc_hash_table (info);
10850 if (htab == NULL)
10851 return FALSE;
10852
10853 /* Make a note of the offset within the stubs for this entry. */
10854 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10855 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10856
10857 htab->stub_count[stub_entry->stub_type - 1] += 1;
10858 switch (stub_entry->stub_type)
10859 {
10860 case ppc_stub_long_branch:
10861 case ppc_stub_long_branch_r2off:
10862 /* Branches are relative. This is where we are going to. */
10863 dest = (stub_entry->target_value
10864 + stub_entry->target_section->output_offset
10865 + stub_entry->target_section->output_section->vma);
10866 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10867 off = dest;
10868
10869 /* And this is where we are coming from. */
10870 off -= (stub_entry->stub_offset
10871 + stub_entry->group->stub_sec->output_offset
10872 + stub_entry->group->stub_sec->output_section->vma);
10873
10874 size = 4;
10875 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10876 {
10877 bfd_vma r2off = get_r2off (info, stub_entry);
10878
10879 if (r2off == (bfd_vma) -1)
10880 {
10881 htab->stub_error = TRUE;
10882 return FALSE;
10883 }
10884 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10885 loc += 4;
10886 size = 8;
10887 if (PPC_HA (r2off) != 0)
10888 {
10889 bfd_put_32 (htab->params->stub_bfd,
10890 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10891 loc += 4;
10892 size += 4;
10893 }
10894 if (PPC_LO (r2off) != 0)
10895 {
10896 bfd_put_32 (htab->params->stub_bfd,
10897 ADDI_R2_R2 | PPC_LO (r2off), loc);
10898 loc += 4;
10899 size += 4;
10900 }
10901 off -= size - 4;
10902 }
10903 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10904
10905 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10906 {
10907 info->callbacks->einfo
10908 (_("%P: long branch stub `%s' offset overflow\n"),
10909 stub_entry->root.string);
10910 htab->stub_error = TRUE;
10911 return FALSE;
10912 }
10913
10914 if (info->emitrelocations)
10915 {
10916 r = get_relocs (stub_entry->group->stub_sec, 1);
10917 if (r == NULL)
10918 return FALSE;
10919 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10920 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10921 r->r_addend = dest;
10922 if (stub_entry->h != NULL)
10923 {
10924 struct elf_link_hash_entry **hashes;
10925 unsigned long symndx;
10926 struct ppc_link_hash_entry *h;
10927
10928 hashes = elf_sym_hashes (htab->params->stub_bfd);
10929 if (hashes == NULL)
10930 {
10931 bfd_size_type hsize;
10932
10933 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10934 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10935 if (hashes == NULL)
10936 return FALSE;
10937 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10938 htab->stub_globals = 1;
10939 }
10940 symndx = htab->stub_globals++;
10941 h = stub_entry->h;
10942 hashes[symndx] = &h->elf;
10943 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10944 if (h->oh != NULL && h->oh->is_func)
10945 h = ppc_follow_link (h->oh);
10946 if (h->elf.root.u.def.section != stub_entry->target_section)
10947 /* H is an opd symbol. The addend must be zero. */
10948 r->r_addend = 0;
10949 else
10950 {
10951 off = (h->elf.root.u.def.value
10952 + h->elf.root.u.def.section->output_offset
10953 + h->elf.root.u.def.section->output_section->vma);
10954 r->r_addend -= off;
10955 }
10956 }
10957 }
10958 break;
10959
10960 case ppc_stub_plt_branch:
10961 case ppc_stub_plt_branch_r2off:
10962 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10963 stub_entry->root.string + 9,
10964 FALSE, FALSE);
10965 if (br_entry == NULL)
10966 {
10967 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10968 stub_entry->root.string);
10969 htab->stub_error = TRUE;
10970 return FALSE;
10971 }
10972
10973 dest = (stub_entry->target_value
10974 + stub_entry->target_section->output_offset
10975 + stub_entry->target_section->output_section->vma);
10976 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10977 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10978
10979 bfd_put_64 (htab->brlt->owner, dest,
10980 htab->brlt->contents + br_entry->offset);
10981
10982 if (br_entry->iter == htab->stub_iteration)
10983 {
10984 br_entry->iter = 0;
10985
10986 if (htab->relbrlt != NULL)
10987 {
10988 /* Create a reloc for the branch lookup table entry. */
10989 Elf_Internal_Rela rela;
10990 bfd_byte *rl;
10991
10992 rela.r_offset = (br_entry->offset
10993 + htab->brlt->output_offset
10994 + htab->brlt->output_section->vma);
10995 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10996 rela.r_addend = dest;
10997
10998 rl = htab->relbrlt->contents;
10999 rl += (htab->relbrlt->reloc_count++
11000 * sizeof (Elf64_External_Rela));
11001 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11002 }
11003 else if (info->emitrelocations)
11004 {
11005 r = get_relocs (htab->brlt, 1);
11006 if (r == NULL)
11007 return FALSE;
11008 /* brlt, being SEC_LINKER_CREATED does not go through the
11009 normal reloc processing. Symbols and offsets are not
11010 translated from input file to output file form, so
11011 set up the offset per the output file. */
11012 r->r_offset = (br_entry->offset
11013 + htab->brlt->output_offset
11014 + htab->brlt->output_section->vma);
11015 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11016 r->r_addend = dest;
11017 }
11018 }
11019
11020 dest = (br_entry->offset
11021 + htab->brlt->output_offset
11022 + htab->brlt->output_section->vma);
11023
11024 off = (dest
11025 - elf_gp (htab->brlt->output_section->owner)
11026 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11027
11028 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11029 {
11030 info->callbacks->einfo
11031 (_("%P: linkage table error against `%T'\n"),
11032 stub_entry->root.string);
11033 bfd_set_error (bfd_error_bad_value);
11034 htab->stub_error = TRUE;
11035 return FALSE;
11036 }
11037
11038 if (info->emitrelocations)
11039 {
11040 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11041 if (r == NULL)
11042 return FALSE;
11043 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11044 if (bfd_big_endian (info->output_bfd))
11045 r[0].r_offset += 2;
11046 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11047 r[0].r_offset += 4;
11048 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11049 r[0].r_addend = dest;
11050 if (PPC_HA (off) != 0)
11051 {
11052 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11053 r[1].r_offset = r[0].r_offset + 4;
11054 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11055 r[1].r_addend = r[0].r_addend;
11056 }
11057 }
11058
11059 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11060 {
11061 if (PPC_HA (off) != 0)
11062 {
11063 size = 16;
11064 bfd_put_32 (htab->params->stub_bfd,
11065 ADDIS_R12_R2 | PPC_HA (off), loc);
11066 loc += 4;
11067 bfd_put_32 (htab->params->stub_bfd,
11068 LD_R12_0R12 | PPC_LO (off), loc);
11069 }
11070 else
11071 {
11072 size = 12;
11073 bfd_put_32 (htab->params->stub_bfd,
11074 LD_R12_0R2 | PPC_LO (off), loc);
11075 }
11076 }
11077 else
11078 {
11079 bfd_vma r2off = get_r2off (info, stub_entry);
11080
11081 if (r2off == (bfd_vma) -1)
11082 {
11083 htab->stub_error = TRUE;
11084 return FALSE;
11085 }
11086
11087 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11088 loc += 4;
11089 size = 16;
11090 if (PPC_HA (off) != 0)
11091 {
11092 size += 4;
11093 bfd_put_32 (htab->params->stub_bfd,
11094 ADDIS_R12_R2 | PPC_HA (off), loc);
11095 loc += 4;
11096 bfd_put_32 (htab->params->stub_bfd,
11097 LD_R12_0R12 | PPC_LO (off), loc);
11098 }
11099 else
11100 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11101
11102 if (PPC_HA (r2off) != 0)
11103 {
11104 size += 4;
11105 loc += 4;
11106 bfd_put_32 (htab->params->stub_bfd,
11107 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11108 }
11109 if (PPC_LO (r2off) != 0)
11110 {
11111 size += 4;
11112 loc += 4;
11113 bfd_put_32 (htab->params->stub_bfd,
11114 ADDI_R2_R2 | PPC_LO (r2off), loc);
11115 }
11116 }
11117 loc += 4;
11118 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11119 loc += 4;
11120 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11121 break;
11122
11123 case ppc_stub_plt_call:
11124 case ppc_stub_plt_call_r2save:
11125 if (stub_entry->h != NULL
11126 && stub_entry->h->is_func_descriptor
11127 && stub_entry->h->oh != NULL)
11128 {
11129 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11130
11131 /* If the old-ABI "dot-symbol" is undefined make it weak so
11132 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11133 if (fh->elf.root.type == bfd_link_hash_undefined
11134 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11135 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11136 fh->elf.root.type = bfd_link_hash_undefweak;
11137 }
11138
11139 /* Now build the stub. */
11140 dest = stub_entry->plt_ent->plt.offset & ~1;
11141 if (dest >= (bfd_vma) -2)
11142 abort ();
11143
11144 plt = htab->elf.splt;
11145 if (!htab->elf.dynamic_sections_created
11146 || stub_entry->h == NULL
11147 || stub_entry->h->elf.dynindx == -1)
11148 plt = htab->elf.iplt;
11149
11150 dest += plt->output_offset + plt->output_section->vma;
11151
11152 if (stub_entry->h == NULL
11153 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11154 {
11155 Elf_Internal_Rela rela;
11156 bfd_byte *rl;
11157
11158 rela.r_offset = dest;
11159 if (htab->opd_abi)
11160 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11161 else
11162 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11163 rela.r_addend = (stub_entry->target_value
11164 + stub_entry->target_section->output_offset
11165 + stub_entry->target_section->output_section->vma);
11166
11167 rl = (htab->elf.irelplt->contents
11168 + (htab->elf.irelplt->reloc_count++
11169 * sizeof (Elf64_External_Rela)));
11170 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11171 stub_entry->plt_ent->plt.offset |= 1;
11172 htab->local_ifunc_resolver = 1;
11173 }
11174
11175 off = (dest
11176 - elf_gp (plt->output_section->owner)
11177 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11178
11179 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11180 {
11181 info->callbacks->einfo
11182 /* xgettext:c-format */
11183 (_("%P: linkage table error against `%T'\n"),
11184 stub_entry->h != NULL
11185 ? stub_entry->h->elf.root.root.string
11186 : "<local sym>");
11187 bfd_set_error (bfd_error_bad_value);
11188 htab->stub_error = TRUE;
11189 return FALSE;
11190 }
11191
11192 if (htab->params->plt_stub_align != 0)
11193 {
11194 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11195
11196 stub_entry->group->stub_sec->size += pad;
11197 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11198 loc += pad;
11199 }
11200
11201 r = NULL;
11202 if (info->emitrelocations)
11203 {
11204 r = get_relocs (stub_entry->group->stub_sec,
11205 ((PPC_HA (off) != 0)
11206 + (htab->opd_abi
11207 ? 2 + (htab->params->plt_static_chain
11208 && PPC_HA (off + 16) == PPC_HA (off))
11209 : 1)));
11210 if (r == NULL)
11211 return FALSE;
11212 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11213 if (bfd_big_endian (info->output_bfd))
11214 r[0].r_offset += 2;
11215 r[0].r_addend = dest;
11216 }
11217 if (stub_entry->h != NULL
11218 && (stub_entry->h == htab->tls_get_addr_fd
11219 || stub_entry->h == htab->tls_get_addr)
11220 && htab->params->tls_get_addr_opt)
11221 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11222 else
11223 p = build_plt_stub (htab, stub_entry, loc, off, r);
11224 size = p - loc;
11225 break;
11226
11227 case ppc_stub_save_res:
11228 return TRUE;
11229
11230 default:
11231 BFD_FAIL ();
11232 return FALSE;
11233 }
11234
11235 stub_entry->group->stub_sec->size += size;
11236
11237 if (htab->params->emit_stub_syms)
11238 {
11239 struct elf_link_hash_entry *h;
11240 size_t len1, len2;
11241 char *name;
11242 const char *const stub_str[] = { "long_branch",
11243 "long_branch_r2off",
11244 "plt_branch",
11245 "plt_branch_r2off",
11246 "plt_call",
11247 "plt_call" };
11248
11249 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11250 len2 = strlen (stub_entry->root.string);
11251 name = bfd_malloc (len1 + len2 + 2);
11252 if (name == NULL)
11253 return FALSE;
11254 memcpy (name, stub_entry->root.string, 9);
11255 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11256 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11257 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11258 if (h == NULL)
11259 return FALSE;
11260 if (h->root.type == bfd_link_hash_new)
11261 {
11262 h->root.type = bfd_link_hash_defined;
11263 h->root.u.def.section = stub_entry->group->stub_sec;
11264 h->root.u.def.value = stub_entry->stub_offset;
11265 h->ref_regular = 1;
11266 h->def_regular = 1;
11267 h->ref_regular_nonweak = 1;
11268 h->forced_local = 1;
11269 h->non_elf = 0;
11270 h->root.linker_def = 1;
11271 }
11272 }
11273
11274 return TRUE;
11275 }
11276
11277 /* As above, but don't actually build the stub. Just bump offset so
11278 we know stub section sizes, and select plt_branch stubs where
11279 long_branch stubs won't do. */
11280
11281 static bfd_boolean
11282 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11283 {
11284 struct ppc_stub_hash_entry *stub_entry;
11285 struct bfd_link_info *info;
11286 struct ppc_link_hash_table *htab;
11287 bfd_vma off;
11288 int size;
11289
11290 /* Massage our args to the form they really have. */
11291 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11292 info = in_arg;
11293
11294 htab = ppc_hash_table (info);
11295 if (htab == NULL)
11296 return FALSE;
11297
11298 if (stub_entry->h != NULL
11299 && stub_entry->h->save_res
11300 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11301 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11302 {
11303 /* Don't make stubs to out-of-line register save/restore
11304 functions. Instead, emit copies of the functions. */
11305 stub_entry->group->needs_save_res = 1;
11306 stub_entry->stub_type = ppc_stub_save_res;
11307 return TRUE;
11308 }
11309
11310 if (stub_entry->stub_type == ppc_stub_plt_call
11311 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11312 {
11313 asection *plt;
11314 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11315 if (off >= (bfd_vma) -2)
11316 abort ();
11317 plt = htab->elf.splt;
11318 if (!htab->elf.dynamic_sections_created
11319 || stub_entry->h == NULL
11320 || stub_entry->h->elf.dynindx == -1)
11321 plt = htab->elf.iplt;
11322 off += (plt->output_offset
11323 + plt->output_section->vma
11324 - elf_gp (plt->output_section->owner)
11325 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11326
11327 size = plt_stub_size (htab, stub_entry, off);
11328 if (htab->params->plt_stub_align)
11329 size += plt_stub_pad (htab, stub_entry, off);
11330 if (info->emitrelocations)
11331 {
11332 stub_entry->group->stub_sec->reloc_count
11333 += ((PPC_HA (off) != 0)
11334 + (htab->opd_abi
11335 ? 2 + (htab->params->plt_static_chain
11336 && PPC_HA (off + 16) == PPC_HA (off))
11337 : 1));
11338 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11339 }
11340 }
11341 else
11342 {
11343 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11344 variants. */
11345 bfd_vma r2off = 0;
11346 bfd_vma local_off = 0;
11347
11348 off = (stub_entry->target_value
11349 + stub_entry->target_section->output_offset
11350 + stub_entry->target_section->output_section->vma);
11351 off -= (stub_entry->group->stub_sec->size
11352 + stub_entry->group->stub_sec->output_offset
11353 + stub_entry->group->stub_sec->output_section->vma);
11354
11355 /* Reset the stub type from the plt variant in case we now
11356 can reach with a shorter stub. */
11357 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11358 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11359
11360 size = 4;
11361 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11362 {
11363 r2off = get_r2off (info, stub_entry);
11364 if (r2off == (bfd_vma) -1)
11365 {
11366 htab->stub_error = TRUE;
11367 return FALSE;
11368 }
11369 size = 8;
11370 if (PPC_HA (r2off) != 0)
11371 size += 4;
11372 if (PPC_LO (r2off) != 0)
11373 size += 4;
11374 off -= size - 4;
11375 }
11376
11377 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11378
11379 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11380 Do the same for -R objects without function descriptors. */
11381 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11382 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11383 && r2off == 0
11384 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11385 {
11386 struct ppc_branch_hash_entry *br_entry;
11387
11388 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11389 stub_entry->root.string + 9,
11390 TRUE, FALSE);
11391 if (br_entry == NULL)
11392 {
11393 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11394 stub_entry->root.string);
11395 htab->stub_error = TRUE;
11396 return FALSE;
11397 }
11398
11399 if (br_entry->iter != htab->stub_iteration)
11400 {
11401 br_entry->iter = htab->stub_iteration;
11402 br_entry->offset = htab->brlt->size;
11403 htab->brlt->size += 8;
11404
11405 if (htab->relbrlt != NULL)
11406 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11407 else if (info->emitrelocations)
11408 {
11409 htab->brlt->reloc_count += 1;
11410 htab->brlt->flags |= SEC_RELOC;
11411 }
11412 }
11413
11414 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11415 off = (br_entry->offset
11416 + htab->brlt->output_offset
11417 + htab->brlt->output_section->vma
11418 - elf_gp (htab->brlt->output_section->owner)
11419 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11420
11421 if (info->emitrelocations)
11422 {
11423 stub_entry->group->stub_sec->reloc_count
11424 += 1 + (PPC_HA (off) != 0);
11425 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11426 }
11427
11428 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11429 {
11430 size = 12;
11431 if (PPC_HA (off) != 0)
11432 size = 16;
11433 }
11434 else
11435 {
11436 size = 16;
11437 if (PPC_HA (off) != 0)
11438 size += 4;
11439
11440 if (PPC_HA (r2off) != 0)
11441 size += 4;
11442 if (PPC_LO (r2off) != 0)
11443 size += 4;
11444 }
11445 }
11446 else if (info->emitrelocations)
11447 {
11448 stub_entry->group->stub_sec->reloc_count += 1;
11449 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11450 }
11451 }
11452
11453 stub_entry->group->stub_sec->size += size;
11454 return TRUE;
11455 }
11456
11457 /* Set up various things so that we can make a list of input sections
11458 for each output section included in the link. Returns -1 on error,
11459 0 when no stubs will be needed, and 1 on success. */
11460
11461 int
11462 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11463 {
11464 unsigned int id;
11465 bfd_size_type amt;
11466 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11467
11468 if (htab == NULL)
11469 return -1;
11470
11471 htab->sec_info_arr_size = bfd_get_next_section_id ();
11472 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11473 htab->sec_info = bfd_zmalloc (amt);
11474 if (htab->sec_info == NULL)
11475 return -1;
11476
11477 /* Set toc_off for com, und, abs and ind sections. */
11478 for (id = 0; id < 3; id++)
11479 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11480
11481 return 1;
11482 }
11483
11484 /* Set up for first pass at multitoc partitioning. */
11485
11486 void
11487 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11488 {
11489 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11490
11491 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11492 htab->toc_bfd = NULL;
11493 htab->toc_first_sec = NULL;
11494 }
11495
11496 /* The linker repeatedly calls this function for each TOC input section
11497 and linker generated GOT section. Group input bfds such that the toc
11498 within a group is less than 64k in size. */
11499
11500 bfd_boolean
11501 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11502 {
11503 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11504 bfd_vma addr, off, limit;
11505
11506 if (htab == NULL)
11507 return FALSE;
11508
11509 if (!htab->second_toc_pass)
11510 {
11511 /* Keep track of the first .toc or .got section for this input bfd. */
11512 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11513
11514 if (new_bfd)
11515 {
11516 htab->toc_bfd = isec->owner;
11517 htab->toc_first_sec = isec;
11518 }
11519
11520 addr = isec->output_offset + isec->output_section->vma;
11521 off = addr - htab->toc_curr;
11522 limit = 0x80008000;
11523 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11524 limit = 0x10000;
11525 if (off + isec->size > limit)
11526 {
11527 addr = (htab->toc_first_sec->output_offset
11528 + htab->toc_first_sec->output_section->vma);
11529 htab->toc_curr = addr;
11530 htab->toc_curr &= -TOC_BASE_ALIGN;
11531 }
11532
11533 /* toc_curr is the base address of this toc group. Set elf_gp
11534 for the input section to be the offset relative to the
11535 output toc base plus 0x8000. Making the input elf_gp an
11536 offset allows us to move the toc as a whole without
11537 recalculating input elf_gp. */
11538 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11539 off += TOC_BASE_OFF;
11540
11541 /* Die if someone uses a linker script that doesn't keep input
11542 file .toc and .got together. */
11543 if (new_bfd
11544 && elf_gp (isec->owner) != 0
11545 && elf_gp (isec->owner) != off)
11546 return FALSE;
11547
11548 elf_gp (isec->owner) = off;
11549 return TRUE;
11550 }
11551
11552 /* During the second pass toc_first_sec points to the start of
11553 a toc group, and toc_curr is used to track the old elf_gp.
11554 We use toc_bfd to ensure we only look at each bfd once. */
11555 if (htab->toc_bfd == isec->owner)
11556 return TRUE;
11557 htab->toc_bfd = isec->owner;
11558
11559 if (htab->toc_first_sec == NULL
11560 || htab->toc_curr != elf_gp (isec->owner))
11561 {
11562 htab->toc_curr = elf_gp (isec->owner);
11563 htab->toc_first_sec = isec;
11564 }
11565 addr = (htab->toc_first_sec->output_offset
11566 + htab->toc_first_sec->output_section->vma);
11567 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11568 elf_gp (isec->owner) = off;
11569
11570 return TRUE;
11571 }
11572
11573 /* Called via elf_link_hash_traverse to merge GOT entries for global
11574 symbol H. */
11575
11576 static bfd_boolean
11577 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11578 {
11579 if (h->root.type == bfd_link_hash_indirect)
11580 return TRUE;
11581
11582 merge_got_entries (&h->got.glist);
11583
11584 return TRUE;
11585 }
11586
11587 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11588 symbol H. */
11589
11590 static bfd_boolean
11591 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11592 {
11593 struct got_entry *gent;
11594
11595 if (h->root.type == bfd_link_hash_indirect)
11596 return TRUE;
11597
11598 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11599 if (!gent->is_indirect)
11600 allocate_got (h, (struct bfd_link_info *) inf, gent);
11601 return TRUE;
11602 }
11603
11604 /* Called on the first multitoc pass after the last call to
11605 ppc64_elf_next_toc_section. This function removes duplicate GOT
11606 entries. */
11607
11608 bfd_boolean
11609 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11610 {
11611 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11612 struct bfd *ibfd, *ibfd2;
11613 bfd_boolean done_something;
11614
11615 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11616
11617 if (!htab->do_multi_toc)
11618 return FALSE;
11619
11620 /* Merge global sym got entries within a toc group. */
11621 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11622
11623 /* And tlsld_got. */
11624 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11625 {
11626 struct got_entry *ent, *ent2;
11627
11628 if (!is_ppc64_elf (ibfd))
11629 continue;
11630
11631 ent = ppc64_tlsld_got (ibfd);
11632 if (!ent->is_indirect
11633 && ent->got.offset != (bfd_vma) -1)
11634 {
11635 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11636 {
11637 if (!is_ppc64_elf (ibfd2))
11638 continue;
11639
11640 ent2 = ppc64_tlsld_got (ibfd2);
11641 if (!ent2->is_indirect
11642 && ent2->got.offset != (bfd_vma) -1
11643 && elf_gp (ibfd2) == elf_gp (ibfd))
11644 {
11645 ent2->is_indirect = TRUE;
11646 ent2->got.ent = ent;
11647 }
11648 }
11649 }
11650 }
11651
11652 /* Zap sizes of got sections. */
11653 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11654 htab->elf.irelplt->size -= htab->got_reli_size;
11655 htab->got_reli_size = 0;
11656
11657 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11658 {
11659 asection *got, *relgot;
11660
11661 if (!is_ppc64_elf (ibfd))
11662 continue;
11663
11664 got = ppc64_elf_tdata (ibfd)->got;
11665 if (got != NULL)
11666 {
11667 got->rawsize = got->size;
11668 got->size = 0;
11669 relgot = ppc64_elf_tdata (ibfd)->relgot;
11670 relgot->rawsize = relgot->size;
11671 relgot->size = 0;
11672 }
11673 }
11674
11675 /* Now reallocate the got, local syms first. We don't need to
11676 allocate section contents again since we never increase size. */
11677 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11678 {
11679 struct got_entry **lgot_ents;
11680 struct got_entry **end_lgot_ents;
11681 struct plt_entry **local_plt;
11682 struct plt_entry **end_local_plt;
11683 unsigned char *lgot_masks;
11684 bfd_size_type locsymcount;
11685 Elf_Internal_Shdr *symtab_hdr;
11686 asection *s;
11687
11688 if (!is_ppc64_elf (ibfd))
11689 continue;
11690
11691 lgot_ents = elf_local_got_ents (ibfd);
11692 if (!lgot_ents)
11693 continue;
11694
11695 symtab_hdr = &elf_symtab_hdr (ibfd);
11696 locsymcount = symtab_hdr->sh_info;
11697 end_lgot_ents = lgot_ents + locsymcount;
11698 local_plt = (struct plt_entry **) end_lgot_ents;
11699 end_local_plt = local_plt + locsymcount;
11700 lgot_masks = (unsigned char *) end_local_plt;
11701 s = ppc64_elf_tdata (ibfd)->got;
11702 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11703 {
11704 struct got_entry *ent;
11705
11706 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11707 {
11708 unsigned int ent_size = 8;
11709 unsigned int rel_size = sizeof (Elf64_External_Rela);
11710
11711 ent->got.offset = s->size;
11712 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11713 {
11714 ent_size *= 2;
11715 rel_size *= 2;
11716 }
11717 s->size += ent_size;
11718 if ((*lgot_masks & PLT_IFUNC) != 0)
11719 {
11720 htab->elf.irelplt->size += rel_size;
11721 htab->got_reli_size += rel_size;
11722 }
11723 else if (bfd_link_pic (info))
11724 {
11725 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11726 srel->size += rel_size;
11727 }
11728 }
11729 }
11730 }
11731
11732 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11733
11734 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11735 {
11736 struct got_entry *ent;
11737
11738 if (!is_ppc64_elf (ibfd))
11739 continue;
11740
11741 ent = ppc64_tlsld_got (ibfd);
11742 if (!ent->is_indirect
11743 && ent->got.offset != (bfd_vma) -1)
11744 {
11745 asection *s = ppc64_elf_tdata (ibfd)->got;
11746 ent->got.offset = s->size;
11747 s->size += 16;
11748 if (bfd_link_pic (info))
11749 {
11750 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11751 srel->size += sizeof (Elf64_External_Rela);
11752 }
11753 }
11754 }
11755
11756 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11757 if (!done_something)
11758 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11759 {
11760 asection *got;
11761
11762 if (!is_ppc64_elf (ibfd))
11763 continue;
11764
11765 got = ppc64_elf_tdata (ibfd)->got;
11766 if (got != NULL)
11767 {
11768 done_something = got->rawsize != got->size;
11769 if (done_something)
11770 break;
11771 }
11772 }
11773
11774 if (done_something)
11775 (*htab->params->layout_sections_again) ();
11776
11777 /* Set up for second pass over toc sections to recalculate elf_gp
11778 on input sections. */
11779 htab->toc_bfd = NULL;
11780 htab->toc_first_sec = NULL;
11781 htab->second_toc_pass = TRUE;
11782 return done_something;
11783 }
11784
11785 /* Called after second pass of multitoc partitioning. */
11786
11787 void
11788 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11789 {
11790 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11791
11792 /* After the second pass, toc_curr tracks the TOC offset used
11793 for code sections below in ppc64_elf_next_input_section. */
11794 htab->toc_curr = TOC_BASE_OFF;
11795 }
11796
11797 /* No toc references were found in ISEC. If the code in ISEC makes no
11798 calls, then there's no need to use toc adjusting stubs when branching
11799 into ISEC. Actually, indirect calls from ISEC are OK as they will
11800 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11801 needed, and 2 if a cyclical call-graph was found but no other reason
11802 for a stub was detected. If called from the top level, a return of
11803 2 means the same as a return of 0. */
11804
11805 static int
11806 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11807 {
11808 int ret;
11809
11810 /* Mark this section as checked. */
11811 isec->call_check_done = 1;
11812
11813 /* We know none of our code bearing sections will need toc stubs. */
11814 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11815 return 0;
11816
11817 if (isec->size == 0)
11818 return 0;
11819
11820 if (isec->output_section == NULL)
11821 return 0;
11822
11823 ret = 0;
11824 if (isec->reloc_count != 0)
11825 {
11826 Elf_Internal_Rela *relstart, *rel;
11827 Elf_Internal_Sym *local_syms;
11828 struct ppc_link_hash_table *htab;
11829
11830 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11831 info->keep_memory);
11832 if (relstart == NULL)
11833 return -1;
11834
11835 /* Look for branches to outside of this section. */
11836 local_syms = NULL;
11837 htab = ppc_hash_table (info);
11838 if (htab == NULL)
11839 return -1;
11840
11841 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11842 {
11843 enum elf_ppc64_reloc_type r_type;
11844 unsigned long r_symndx;
11845 struct elf_link_hash_entry *h;
11846 struct ppc_link_hash_entry *eh;
11847 Elf_Internal_Sym *sym;
11848 asection *sym_sec;
11849 struct _opd_sec_data *opd;
11850 bfd_vma sym_value;
11851 bfd_vma dest;
11852
11853 r_type = ELF64_R_TYPE (rel->r_info);
11854 if (r_type != R_PPC64_REL24
11855 && r_type != R_PPC64_REL14
11856 && r_type != R_PPC64_REL14_BRTAKEN
11857 && r_type != R_PPC64_REL14_BRNTAKEN)
11858 continue;
11859
11860 r_symndx = ELF64_R_SYM (rel->r_info);
11861 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11862 isec->owner))
11863 {
11864 ret = -1;
11865 break;
11866 }
11867
11868 /* Calls to dynamic lib functions go through a plt call stub
11869 that uses r2. */
11870 eh = (struct ppc_link_hash_entry *) h;
11871 if (eh != NULL
11872 && (eh->elf.plt.plist != NULL
11873 || (eh->oh != NULL
11874 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11875 {
11876 ret = 1;
11877 break;
11878 }
11879
11880 if (sym_sec == NULL)
11881 /* Ignore other undefined symbols. */
11882 continue;
11883
11884 /* Assume branches to other sections not included in the
11885 link need stubs too, to cover -R and absolute syms. */
11886 if (sym_sec->output_section == NULL)
11887 {
11888 ret = 1;
11889 break;
11890 }
11891
11892 if (h == NULL)
11893 sym_value = sym->st_value;
11894 else
11895 {
11896 if (h->root.type != bfd_link_hash_defined
11897 && h->root.type != bfd_link_hash_defweak)
11898 abort ();
11899 sym_value = h->root.u.def.value;
11900 }
11901 sym_value += rel->r_addend;
11902
11903 /* If this branch reloc uses an opd sym, find the code section. */
11904 opd = get_opd_info (sym_sec);
11905 if (opd != NULL)
11906 {
11907 if (h == NULL && opd->adjust != NULL)
11908 {
11909 long adjust;
11910
11911 adjust = opd->adjust[OPD_NDX (sym_value)];
11912 if (adjust == -1)
11913 /* Assume deleted functions won't ever be called. */
11914 continue;
11915 sym_value += adjust;
11916 }
11917
11918 dest = opd_entry_value (sym_sec, sym_value,
11919 &sym_sec, NULL, FALSE);
11920 if (dest == (bfd_vma) -1)
11921 continue;
11922 }
11923 else
11924 dest = (sym_value
11925 + sym_sec->output_offset
11926 + sym_sec->output_section->vma);
11927
11928 /* Ignore branch to self. */
11929 if (sym_sec == isec)
11930 continue;
11931
11932 /* If the called function uses the toc, we need a stub. */
11933 if (sym_sec->has_toc_reloc
11934 || sym_sec->makes_toc_func_call)
11935 {
11936 ret = 1;
11937 break;
11938 }
11939
11940 /* Assume any branch that needs a long branch stub might in fact
11941 need a plt_branch stub. A plt_branch stub uses r2. */
11942 else if (dest - (isec->output_offset
11943 + isec->output_section->vma
11944 + rel->r_offset) + (1 << 25)
11945 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11946 ? h->other
11947 : sym->st_other))
11948 {
11949 ret = 1;
11950 break;
11951 }
11952
11953 /* If calling back to a section in the process of being
11954 tested, we can't say for sure that no toc adjusting stubs
11955 are needed, so don't return zero. */
11956 else if (sym_sec->call_check_in_progress)
11957 ret = 2;
11958
11959 /* Branches to another section that itself doesn't have any TOC
11960 references are OK. Recursively call ourselves to check. */
11961 else if (!sym_sec->call_check_done)
11962 {
11963 int recur;
11964
11965 /* Mark current section as indeterminate, so that other
11966 sections that call back to current won't be marked as
11967 known. */
11968 isec->call_check_in_progress = 1;
11969 recur = toc_adjusting_stub_needed (info, sym_sec);
11970 isec->call_check_in_progress = 0;
11971
11972 if (recur != 0)
11973 {
11974 ret = recur;
11975 if (recur != 2)
11976 break;
11977 }
11978 }
11979 }
11980
11981 if (local_syms != NULL
11982 && (elf_symtab_hdr (isec->owner).contents
11983 != (unsigned char *) local_syms))
11984 free (local_syms);
11985 if (elf_section_data (isec)->relocs != relstart)
11986 free (relstart);
11987 }
11988
11989 if ((ret & 1) == 0
11990 && isec->map_head.s != NULL
11991 && (strcmp (isec->output_section->name, ".init") == 0
11992 || strcmp (isec->output_section->name, ".fini") == 0))
11993 {
11994 if (isec->map_head.s->has_toc_reloc
11995 || isec->map_head.s->makes_toc_func_call)
11996 ret = 1;
11997 else if (!isec->map_head.s->call_check_done)
11998 {
11999 int recur;
12000 isec->call_check_in_progress = 1;
12001 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12002 isec->call_check_in_progress = 0;
12003 if (recur != 0)
12004 ret = recur;
12005 }
12006 }
12007
12008 if (ret == 1)
12009 isec->makes_toc_func_call = 1;
12010
12011 return ret;
12012 }
12013
12014 /* The linker repeatedly calls this function for each input section,
12015 in the order that input sections are linked into output sections.
12016 Build lists of input sections to determine groupings between which
12017 we may insert linker stubs. */
12018
12019 bfd_boolean
12020 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12021 {
12022 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12023
12024 if (htab == NULL)
12025 return FALSE;
12026
12027 if ((isec->output_section->flags & SEC_CODE) != 0
12028 && isec->output_section->id < htab->sec_info_arr_size)
12029 {
12030 /* This happens to make the list in reverse order,
12031 which is what we want. */
12032 htab->sec_info[isec->id].u.list
12033 = htab->sec_info[isec->output_section->id].u.list;
12034 htab->sec_info[isec->output_section->id].u.list = isec;
12035 }
12036
12037 if (htab->multi_toc_needed)
12038 {
12039 /* Analyse sections that aren't already flagged as needing a
12040 valid toc pointer. Exclude .fixup for the linux kernel.
12041 .fixup contains branches, but only back to the function that
12042 hit an exception. */
12043 if (!(isec->has_toc_reloc
12044 || (isec->flags & SEC_CODE) == 0
12045 || strcmp (isec->name, ".fixup") == 0
12046 || isec->call_check_done))
12047 {
12048 if (toc_adjusting_stub_needed (info, isec) < 0)
12049 return FALSE;
12050 }
12051 /* Make all sections use the TOC assigned for this object file.
12052 This will be wrong for pasted sections; We fix that in
12053 check_pasted_section(). */
12054 if (elf_gp (isec->owner) != 0)
12055 htab->toc_curr = elf_gp (isec->owner);
12056 }
12057
12058 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12059 return TRUE;
12060 }
12061
12062 /* Check that all .init and .fini sections use the same toc, if they
12063 have toc relocs. */
12064
12065 static bfd_boolean
12066 check_pasted_section (struct bfd_link_info *info, const char *name)
12067 {
12068 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12069
12070 if (o != NULL)
12071 {
12072 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12073 bfd_vma toc_off = 0;
12074 asection *i;
12075
12076 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12077 if (i->has_toc_reloc)
12078 {
12079 if (toc_off == 0)
12080 toc_off = htab->sec_info[i->id].toc_off;
12081 else if (toc_off != htab->sec_info[i->id].toc_off)
12082 return FALSE;
12083 }
12084
12085 if (toc_off == 0)
12086 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12087 if (i->makes_toc_func_call)
12088 {
12089 toc_off = htab->sec_info[i->id].toc_off;
12090 break;
12091 }
12092
12093 /* Make sure the whole pasted function uses the same toc offset. */
12094 if (toc_off != 0)
12095 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12096 htab->sec_info[i->id].toc_off = toc_off;
12097 }
12098 return TRUE;
12099 }
12100
12101 bfd_boolean
12102 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12103 {
12104 return (check_pasted_section (info, ".init")
12105 & check_pasted_section (info, ".fini"));
12106 }
12107
12108 /* See whether we can group stub sections together. Grouping stub
12109 sections may result in fewer stubs. More importantly, we need to
12110 put all .init* and .fini* stubs at the beginning of the .init or
12111 .fini output sections respectively, because glibc splits the
12112 _init and _fini functions into multiple parts. Putting a stub in
12113 the middle of a function is not a good idea. */
12114
12115 static bfd_boolean
12116 group_sections (struct bfd_link_info *info,
12117 bfd_size_type stub_group_size,
12118 bfd_boolean stubs_always_before_branch)
12119 {
12120 struct ppc_link_hash_table *htab;
12121 asection *osec;
12122 bfd_boolean suppress_size_errors;
12123
12124 htab = ppc_hash_table (info);
12125 if (htab == NULL)
12126 return FALSE;
12127
12128 suppress_size_errors = FALSE;
12129 if (stub_group_size == 1)
12130 {
12131 /* Default values. */
12132 if (stubs_always_before_branch)
12133 stub_group_size = 0x1e00000;
12134 else
12135 stub_group_size = 0x1c00000;
12136 suppress_size_errors = TRUE;
12137 }
12138
12139 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12140 {
12141 asection *tail;
12142
12143 if (osec->id >= htab->sec_info_arr_size)
12144 continue;
12145
12146 tail = htab->sec_info[osec->id].u.list;
12147 while (tail != NULL)
12148 {
12149 asection *curr;
12150 asection *prev;
12151 bfd_size_type total;
12152 bfd_boolean big_sec;
12153 bfd_vma curr_toc;
12154 struct map_stub *group;
12155 bfd_size_type group_size;
12156
12157 curr = tail;
12158 total = tail->size;
12159 group_size = (ppc64_elf_section_data (tail) != NULL
12160 && ppc64_elf_section_data (tail)->has_14bit_branch
12161 ? stub_group_size >> 10 : stub_group_size);
12162
12163 big_sec = total > group_size;
12164 if (big_sec && !suppress_size_errors)
12165 /* xgettext:c-format */
12166 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12167 tail->owner, tail);
12168 curr_toc = htab->sec_info[tail->id].toc_off;
12169
12170 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12171 && ((total += curr->output_offset - prev->output_offset)
12172 < (ppc64_elf_section_data (prev) != NULL
12173 && ppc64_elf_section_data (prev)->has_14bit_branch
12174 ? (group_size = stub_group_size >> 10) : group_size))
12175 && htab->sec_info[prev->id].toc_off == curr_toc)
12176 curr = prev;
12177
12178 /* OK, the size from the start of CURR to the end is less
12179 than group_size and thus can be handled by one stub
12180 section. (or the tail section is itself larger than
12181 group_size, in which case we may be toast.) We should
12182 really be keeping track of the total size of stubs added
12183 here, as stubs contribute to the final output section
12184 size. That's a little tricky, and this way will only
12185 break if stubs added make the total size more than 2^25,
12186 ie. for the default stub_group_size, if stubs total more
12187 than 2097152 bytes, or nearly 75000 plt call stubs. */
12188 group = bfd_alloc (curr->owner, sizeof (*group));
12189 if (group == NULL)
12190 return FALSE;
12191 group->link_sec = curr;
12192 group->stub_sec = NULL;
12193 group->needs_save_res = 0;
12194 group->next = htab->group;
12195 htab->group = group;
12196 do
12197 {
12198 prev = htab->sec_info[tail->id].u.list;
12199 /* Set up this stub group. */
12200 htab->sec_info[tail->id].u.group = group;
12201 }
12202 while (tail != curr && (tail = prev) != NULL);
12203
12204 /* But wait, there's more! Input sections up to group_size
12205 bytes before the stub section can be handled by it too.
12206 Don't do this if we have a really large section after the
12207 stubs, as adding more stubs increases the chance that
12208 branches may not reach into the stub section. */
12209 if (!stubs_always_before_branch && !big_sec)
12210 {
12211 total = 0;
12212 while (prev != NULL
12213 && ((total += tail->output_offset - prev->output_offset)
12214 < (ppc64_elf_section_data (prev) != NULL
12215 && ppc64_elf_section_data (prev)->has_14bit_branch
12216 ? (group_size = stub_group_size >> 10) : group_size))
12217 && htab->sec_info[prev->id].toc_off == curr_toc)
12218 {
12219 tail = prev;
12220 prev = htab->sec_info[tail->id].u.list;
12221 htab->sec_info[tail->id].u.group = group;
12222 }
12223 }
12224 tail = prev;
12225 }
12226 }
12227 return TRUE;
12228 }
12229
12230 static const unsigned char glink_eh_frame_cie[] =
12231 {
12232 0, 0, 0, 16, /* length. */
12233 0, 0, 0, 0, /* id. */
12234 1, /* CIE version. */
12235 'z', 'R', 0, /* Augmentation string. */
12236 4, /* Code alignment. */
12237 0x78, /* Data alignment. */
12238 65, /* RA reg. */
12239 1, /* Augmentation size. */
12240 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12241 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12242 };
12243
12244 /* Stripping output sections is normally done before dynamic section
12245 symbols have been allocated. This function is called later, and
12246 handles cases like htab->brlt which is mapped to its own output
12247 section. */
12248
12249 static void
12250 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12251 {
12252 if (isec->size == 0
12253 && isec->output_section->size == 0
12254 && !(isec->output_section->flags & SEC_KEEP)
12255 && !bfd_section_removed_from_list (info->output_bfd,
12256 isec->output_section)
12257 && elf_section_data (isec->output_section)->dynindx == 0)
12258 {
12259 isec->output_section->flags |= SEC_EXCLUDE;
12260 bfd_section_list_remove (info->output_bfd, isec->output_section);
12261 info->output_bfd->section_count--;
12262 }
12263 }
12264
12265 /* Determine and set the size of the stub section for a final link.
12266
12267 The basic idea here is to examine all the relocations looking for
12268 PC-relative calls to a target that is unreachable with a "bl"
12269 instruction. */
12270
12271 bfd_boolean
12272 ppc64_elf_size_stubs (struct bfd_link_info *info)
12273 {
12274 bfd_size_type stub_group_size;
12275 bfd_boolean stubs_always_before_branch;
12276 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12277
12278 if (htab == NULL)
12279 return FALSE;
12280
12281 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12282 htab->params->plt_thread_safe = 1;
12283 if (!htab->opd_abi)
12284 htab->params->plt_thread_safe = 0;
12285 else if (htab->params->plt_thread_safe == -1)
12286 {
12287 static const char *const thread_starter[] =
12288 {
12289 "pthread_create",
12290 /* libstdc++ */
12291 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12292 /* librt */
12293 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12294 "mq_notify", "create_timer",
12295 /* libanl */
12296 "getaddrinfo_a",
12297 /* libgomp */
12298 "GOMP_parallel",
12299 "GOMP_parallel_start",
12300 "GOMP_parallel_loop_static",
12301 "GOMP_parallel_loop_static_start",
12302 "GOMP_parallel_loop_dynamic",
12303 "GOMP_parallel_loop_dynamic_start",
12304 "GOMP_parallel_loop_guided",
12305 "GOMP_parallel_loop_guided_start",
12306 "GOMP_parallel_loop_runtime",
12307 "GOMP_parallel_loop_runtime_start",
12308 "GOMP_parallel_sections",
12309 "GOMP_parallel_sections_start",
12310 /* libgo */
12311 "__go_go",
12312 };
12313 unsigned i;
12314
12315 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12316 {
12317 struct elf_link_hash_entry *h;
12318 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12319 FALSE, FALSE, TRUE);
12320 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12321 if (htab->params->plt_thread_safe)
12322 break;
12323 }
12324 }
12325 stubs_always_before_branch = htab->params->group_size < 0;
12326 if (htab->params->group_size < 0)
12327 stub_group_size = -htab->params->group_size;
12328 else
12329 stub_group_size = htab->params->group_size;
12330
12331 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12332 return FALSE;
12333
12334 #define STUB_SHRINK_ITER 20
12335 /* Loop until no stubs added. After iteration 20 of this loop we may
12336 exit on a stub section shrinking. This is to break out of a
12337 pathological case where adding stubs on one iteration decreases
12338 section gaps (perhaps due to alignment), which then requires
12339 fewer or smaller stubs on the next iteration. */
12340
12341 while (1)
12342 {
12343 bfd *input_bfd;
12344 unsigned int bfd_indx;
12345 struct map_stub *group;
12346 asection *stub_sec;
12347
12348 htab->stub_iteration += 1;
12349
12350 for (input_bfd = info->input_bfds, bfd_indx = 0;
12351 input_bfd != NULL;
12352 input_bfd = input_bfd->link.next, bfd_indx++)
12353 {
12354 Elf_Internal_Shdr *symtab_hdr;
12355 asection *section;
12356 Elf_Internal_Sym *local_syms = NULL;
12357
12358 if (!is_ppc64_elf (input_bfd))
12359 continue;
12360
12361 /* We'll need the symbol table in a second. */
12362 symtab_hdr = &elf_symtab_hdr (input_bfd);
12363 if (symtab_hdr->sh_info == 0)
12364 continue;
12365
12366 /* Walk over each section attached to the input bfd. */
12367 for (section = input_bfd->sections;
12368 section != NULL;
12369 section = section->next)
12370 {
12371 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12372
12373 /* If there aren't any relocs, then there's nothing more
12374 to do. */
12375 if ((section->flags & SEC_RELOC) == 0
12376 || (section->flags & SEC_ALLOC) == 0
12377 || (section->flags & SEC_LOAD) == 0
12378 || (section->flags & SEC_CODE) == 0
12379 || section->reloc_count == 0)
12380 continue;
12381
12382 /* If this section is a link-once section that will be
12383 discarded, then don't create any stubs. */
12384 if (section->output_section == NULL
12385 || section->output_section->owner != info->output_bfd)
12386 continue;
12387
12388 /* Get the relocs. */
12389 internal_relocs
12390 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12391 info->keep_memory);
12392 if (internal_relocs == NULL)
12393 goto error_ret_free_local;
12394
12395 /* Now examine each relocation. */
12396 irela = internal_relocs;
12397 irelaend = irela + section->reloc_count;
12398 for (; irela < irelaend; irela++)
12399 {
12400 enum elf_ppc64_reloc_type r_type;
12401 unsigned int r_indx;
12402 enum ppc_stub_type stub_type;
12403 struct ppc_stub_hash_entry *stub_entry;
12404 asection *sym_sec, *code_sec;
12405 bfd_vma sym_value, code_value;
12406 bfd_vma destination;
12407 unsigned long local_off;
12408 bfd_boolean ok_dest;
12409 struct ppc_link_hash_entry *hash;
12410 struct ppc_link_hash_entry *fdh;
12411 struct elf_link_hash_entry *h;
12412 Elf_Internal_Sym *sym;
12413 char *stub_name;
12414 const asection *id_sec;
12415 struct _opd_sec_data *opd;
12416 struct plt_entry *plt_ent;
12417
12418 r_type = ELF64_R_TYPE (irela->r_info);
12419 r_indx = ELF64_R_SYM (irela->r_info);
12420
12421 if (r_type >= R_PPC64_max)
12422 {
12423 bfd_set_error (bfd_error_bad_value);
12424 goto error_ret_free_internal;
12425 }
12426
12427 /* Only look for stubs on branch instructions. */
12428 if (r_type != R_PPC64_REL24
12429 && r_type != R_PPC64_REL14
12430 && r_type != R_PPC64_REL14_BRTAKEN
12431 && r_type != R_PPC64_REL14_BRNTAKEN)
12432 continue;
12433
12434 /* Now determine the call target, its name, value,
12435 section. */
12436 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12437 r_indx, input_bfd))
12438 goto error_ret_free_internal;
12439 hash = (struct ppc_link_hash_entry *) h;
12440
12441 ok_dest = FALSE;
12442 fdh = NULL;
12443 sym_value = 0;
12444 if (hash == NULL)
12445 {
12446 sym_value = sym->st_value;
12447 if (sym_sec != NULL
12448 && sym_sec->output_section != NULL)
12449 ok_dest = TRUE;
12450 }
12451 else if (hash->elf.root.type == bfd_link_hash_defined
12452 || hash->elf.root.type == bfd_link_hash_defweak)
12453 {
12454 sym_value = hash->elf.root.u.def.value;
12455 if (sym_sec->output_section != NULL)
12456 ok_dest = TRUE;
12457 }
12458 else if (hash->elf.root.type == bfd_link_hash_undefweak
12459 || hash->elf.root.type == bfd_link_hash_undefined)
12460 {
12461 /* Recognise an old ABI func code entry sym, and
12462 use the func descriptor sym instead if it is
12463 defined. */
12464 if (hash->elf.root.root.string[0] == '.'
12465 && hash->oh != NULL)
12466 {
12467 fdh = ppc_follow_link (hash->oh);
12468 if (fdh->elf.root.type == bfd_link_hash_defined
12469 || fdh->elf.root.type == bfd_link_hash_defweak)
12470 {
12471 sym_sec = fdh->elf.root.u.def.section;
12472 sym_value = fdh->elf.root.u.def.value;
12473 if (sym_sec->output_section != NULL)
12474 ok_dest = TRUE;
12475 }
12476 else
12477 fdh = NULL;
12478 }
12479 }
12480 else
12481 {
12482 bfd_set_error (bfd_error_bad_value);
12483 goto error_ret_free_internal;
12484 }
12485
12486 destination = 0;
12487 local_off = 0;
12488 if (ok_dest)
12489 {
12490 sym_value += irela->r_addend;
12491 destination = (sym_value
12492 + sym_sec->output_offset
12493 + sym_sec->output_section->vma);
12494 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12495 ? hash->elf.other
12496 : sym->st_other);
12497 }
12498
12499 code_sec = sym_sec;
12500 code_value = sym_value;
12501 opd = get_opd_info (sym_sec);
12502 if (opd != NULL)
12503 {
12504 bfd_vma dest;
12505
12506 if (hash == NULL && opd->adjust != NULL)
12507 {
12508 long adjust = opd->adjust[OPD_NDX (sym_value)];
12509 if (adjust == -1)
12510 continue;
12511 code_value += adjust;
12512 sym_value += adjust;
12513 }
12514 dest = opd_entry_value (sym_sec, sym_value,
12515 &code_sec, &code_value, FALSE);
12516 if (dest != (bfd_vma) -1)
12517 {
12518 destination = dest;
12519 if (fdh != NULL)
12520 {
12521 /* Fixup old ABI sym to point at code
12522 entry. */
12523 hash->elf.root.type = bfd_link_hash_defweak;
12524 hash->elf.root.u.def.section = code_sec;
12525 hash->elf.root.u.def.value = code_value;
12526 }
12527 }
12528 }
12529
12530 /* Determine what (if any) linker stub is needed. */
12531 plt_ent = NULL;
12532 stub_type = ppc_type_of_stub (section, irela, &hash,
12533 &plt_ent, destination,
12534 local_off);
12535
12536 if (stub_type != ppc_stub_plt_call)
12537 {
12538 /* Check whether we need a TOC adjusting stub.
12539 Since the linker pastes together pieces from
12540 different object files when creating the
12541 _init and _fini functions, it may be that a
12542 call to what looks like a local sym is in
12543 fact a call needing a TOC adjustment. */
12544 if (code_sec != NULL
12545 && code_sec->output_section != NULL
12546 && (htab->sec_info[code_sec->id].toc_off
12547 != htab->sec_info[section->id].toc_off)
12548 && (code_sec->has_toc_reloc
12549 || code_sec->makes_toc_func_call))
12550 stub_type = ppc_stub_long_branch_r2off;
12551 }
12552
12553 if (stub_type == ppc_stub_none)
12554 continue;
12555
12556 /* __tls_get_addr calls might be eliminated. */
12557 if (stub_type != ppc_stub_plt_call
12558 && hash != NULL
12559 && (hash == htab->tls_get_addr
12560 || hash == htab->tls_get_addr_fd)
12561 && section->has_tls_reloc
12562 && irela != internal_relocs)
12563 {
12564 /* Get tls info. */
12565 unsigned char *tls_mask;
12566
12567 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12568 irela - 1, input_bfd))
12569 goto error_ret_free_internal;
12570 if (*tls_mask != 0)
12571 continue;
12572 }
12573
12574 if (stub_type == ppc_stub_plt_call
12575 && irela + 1 < irelaend
12576 && irela[1].r_offset == irela->r_offset + 4
12577 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12578 {
12579 if (!tocsave_find (htab, INSERT,
12580 &local_syms, irela + 1, input_bfd))
12581 goto error_ret_free_internal;
12582 }
12583 else if (stub_type == ppc_stub_plt_call)
12584 stub_type = ppc_stub_plt_call_r2save;
12585
12586 /* Support for grouping stub sections. */
12587 id_sec = htab->sec_info[section->id].u.group->link_sec;
12588
12589 /* Get the name of this stub. */
12590 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12591 if (!stub_name)
12592 goto error_ret_free_internal;
12593
12594 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12595 stub_name, FALSE, FALSE);
12596 if (stub_entry != NULL)
12597 {
12598 /* The proper stub has already been created. */
12599 free (stub_name);
12600 if (stub_type == ppc_stub_plt_call_r2save)
12601 stub_entry->stub_type = stub_type;
12602 continue;
12603 }
12604
12605 stub_entry = ppc_add_stub (stub_name, section, info);
12606 if (stub_entry == NULL)
12607 {
12608 free (stub_name);
12609 error_ret_free_internal:
12610 if (elf_section_data (section)->relocs == NULL)
12611 free (internal_relocs);
12612 error_ret_free_local:
12613 if (local_syms != NULL
12614 && (symtab_hdr->contents
12615 != (unsigned char *) local_syms))
12616 free (local_syms);
12617 return FALSE;
12618 }
12619
12620 stub_entry->stub_type = stub_type;
12621 if (stub_type != ppc_stub_plt_call
12622 && stub_type != ppc_stub_plt_call_r2save)
12623 {
12624 stub_entry->target_value = code_value;
12625 stub_entry->target_section = code_sec;
12626 }
12627 else
12628 {
12629 stub_entry->target_value = sym_value;
12630 stub_entry->target_section = sym_sec;
12631 }
12632 stub_entry->h = hash;
12633 stub_entry->plt_ent = plt_ent;
12634 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12635
12636 if (stub_entry->h != NULL)
12637 htab->stub_globals += 1;
12638 }
12639
12640 /* We're done with the internal relocs, free them. */
12641 if (elf_section_data (section)->relocs != internal_relocs)
12642 free (internal_relocs);
12643 }
12644
12645 if (local_syms != NULL
12646 && symtab_hdr->contents != (unsigned char *) local_syms)
12647 {
12648 if (!info->keep_memory)
12649 free (local_syms);
12650 else
12651 symtab_hdr->contents = (unsigned char *) local_syms;
12652 }
12653 }
12654
12655 /* We may have added some stubs. Find out the new size of the
12656 stub sections. */
12657 for (stub_sec = htab->params->stub_bfd->sections;
12658 stub_sec != NULL;
12659 stub_sec = stub_sec->next)
12660 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12661 {
12662 if (htab->stub_iteration <= STUB_SHRINK_ITER
12663 || stub_sec->rawsize < stub_sec->size)
12664 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12665 stub_sec->rawsize = stub_sec->size;
12666 stub_sec->size = 0;
12667 stub_sec->reloc_count = 0;
12668 stub_sec->flags &= ~SEC_RELOC;
12669 }
12670
12671 htab->brlt->size = 0;
12672 htab->brlt->reloc_count = 0;
12673 htab->brlt->flags &= ~SEC_RELOC;
12674 if (htab->relbrlt != NULL)
12675 htab->relbrlt->size = 0;
12676
12677 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12678
12679 for (group = htab->group; group != NULL; group = group->next)
12680 if (group->needs_save_res)
12681 group->stub_sec->size += htab->sfpr->size;
12682
12683 if (info->emitrelocations
12684 && htab->glink != NULL && htab->glink->size != 0)
12685 {
12686 htab->glink->reloc_count = 1;
12687 htab->glink->flags |= SEC_RELOC;
12688 }
12689
12690 if (htab->glink_eh_frame != NULL
12691 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12692 && htab->glink_eh_frame->output_section->size != 0)
12693 {
12694 size_t size = 0, align = 4;
12695
12696 for (stub_sec = htab->params->stub_bfd->sections;
12697 stub_sec != NULL;
12698 stub_sec = stub_sec->next)
12699 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12700 size += (17 + align - 1) & -align;
12701 if (htab->glink != NULL && htab->glink->size != 0)
12702 size += (24 + align - 1) & -align;
12703 if (size != 0)
12704 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12705 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12706 size = (size + align - 1) & -align;
12707 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12708 htab->glink_eh_frame->size = size;
12709 }
12710
12711 if (htab->params->plt_stub_align != 0)
12712 for (stub_sec = htab->params->stub_bfd->sections;
12713 stub_sec != NULL;
12714 stub_sec = stub_sec->next)
12715 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12716 stub_sec->size = ((stub_sec->size
12717 + (1 << htab->params->plt_stub_align) - 1)
12718 & -(1 << htab->params->plt_stub_align));
12719
12720 for (stub_sec = htab->params->stub_bfd->sections;
12721 stub_sec != NULL;
12722 stub_sec = stub_sec->next)
12723 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12724 && stub_sec->rawsize != stub_sec->size
12725 && (htab->stub_iteration <= STUB_SHRINK_ITER
12726 || stub_sec->rawsize < stub_sec->size))
12727 break;
12728
12729 if (stub_sec == NULL
12730 && (htab->glink_eh_frame == NULL
12731 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12732 break;
12733
12734 /* Ask the linker to do its stuff. */
12735 (*htab->params->layout_sections_again) ();
12736 }
12737
12738 if (htab->glink_eh_frame != NULL
12739 && htab->glink_eh_frame->size != 0)
12740 {
12741 bfd_vma val;
12742 bfd_byte *p, *last_fde;
12743 size_t last_fde_len, size, align, pad;
12744 asection *stub_sec;
12745
12746 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12747 if (p == NULL)
12748 return FALSE;
12749 htab->glink_eh_frame->contents = p;
12750 last_fde = p;
12751 align = 4;
12752
12753 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12754 /* CIE length (rewrite in case little-endian). */
12755 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12756 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12757 p += last_fde_len + 4;
12758
12759 for (stub_sec = htab->params->stub_bfd->sections;
12760 stub_sec != NULL;
12761 stub_sec = stub_sec->next)
12762 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12763 {
12764 last_fde = p;
12765 last_fde_len = ((17 + align - 1) & -align) - 4;
12766 /* FDE length. */
12767 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12768 p += 4;
12769 /* CIE pointer. */
12770 val = p - htab->glink_eh_frame->contents;
12771 bfd_put_32 (htab->elf.dynobj, val, p);
12772 p += 4;
12773 /* Offset to stub section, written later. */
12774 p += 4;
12775 /* stub section size. */
12776 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12777 p += 4;
12778 /* Augmentation. */
12779 p += 1;
12780 /* Pad. */
12781 p += ((17 + align - 1) & -align) - 17;
12782 }
12783 if (htab->glink != NULL && htab->glink->size != 0)
12784 {
12785 last_fde = p;
12786 last_fde_len = ((24 + align - 1) & -align) - 4;
12787 /* FDE length. */
12788 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12789 p += 4;
12790 /* CIE pointer. */
12791 val = p - htab->glink_eh_frame->contents;
12792 bfd_put_32 (htab->elf.dynobj, val, p);
12793 p += 4;
12794 /* Offset to .glink, written later. */
12795 p += 4;
12796 /* .glink size. */
12797 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12798 p += 4;
12799 /* Augmentation. */
12800 p += 1;
12801
12802 *p++ = DW_CFA_advance_loc + 1;
12803 *p++ = DW_CFA_register;
12804 *p++ = 65;
12805 *p++ = htab->opd_abi ? 12 : 0;
12806 *p++ = DW_CFA_advance_loc + 4;
12807 *p++ = DW_CFA_restore_extended;
12808 *p++ = 65;
12809 p += ((24 + align - 1) & -align) - 24;
12810 }
12811 /* Subsume any padding into the last FDE if user .eh_frame
12812 sections are aligned more than glink_eh_frame. Otherwise any
12813 zero padding will be seen as a terminator. */
12814 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12815 size = p - htab->glink_eh_frame->contents;
12816 pad = ((size + align - 1) & -align) - size;
12817 htab->glink_eh_frame->size = size + pad;
12818 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12819 }
12820
12821 maybe_strip_output (info, htab->brlt);
12822 if (htab->glink_eh_frame != NULL)
12823 maybe_strip_output (info, htab->glink_eh_frame);
12824
12825 return TRUE;
12826 }
12827
12828 /* Called after we have determined section placement. If sections
12829 move, we'll be called again. Provide a value for TOCstart. */
12830
12831 bfd_vma
12832 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12833 {
12834 asection *s;
12835 bfd_vma TOCstart, adjust;
12836
12837 if (info != NULL)
12838 {
12839 struct elf_link_hash_entry *h;
12840 struct elf_link_hash_table *htab = elf_hash_table (info);
12841
12842 if (is_elf_hash_table (htab)
12843 && htab->hgot != NULL)
12844 h = htab->hgot;
12845 else
12846 {
12847 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12848 if (is_elf_hash_table (htab))
12849 htab->hgot = h;
12850 }
12851 if (h != NULL
12852 && h->root.type == bfd_link_hash_defined
12853 && !h->root.linker_def
12854 && (!is_elf_hash_table (htab)
12855 || h->def_regular))
12856 {
12857 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12858 + h->root.u.def.section->output_offset
12859 + h->root.u.def.section->output_section->vma);
12860 _bfd_set_gp_value (obfd, TOCstart);
12861 return TOCstart;
12862 }
12863 }
12864
12865 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12866 order. The TOC starts where the first of these sections starts. */
12867 s = bfd_get_section_by_name (obfd, ".got");
12868 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12869 s = bfd_get_section_by_name (obfd, ".toc");
12870 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12871 s = bfd_get_section_by_name (obfd, ".tocbss");
12872 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12873 s = bfd_get_section_by_name (obfd, ".plt");
12874 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12875 {
12876 /* This may happen for
12877 o references to TOC base (SYM@toc / TOC[tc0]) without a
12878 .toc directive
12879 o bad linker script
12880 o --gc-sections and empty TOC sections
12881
12882 FIXME: Warn user? */
12883
12884 /* Look for a likely section. We probably won't even be
12885 using TOCstart. */
12886 for (s = obfd->sections; s != NULL; s = s->next)
12887 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12888 | SEC_EXCLUDE))
12889 == (SEC_ALLOC | SEC_SMALL_DATA))
12890 break;
12891 if (s == NULL)
12892 for (s = obfd->sections; s != NULL; s = s->next)
12893 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12894 == (SEC_ALLOC | SEC_SMALL_DATA))
12895 break;
12896 if (s == NULL)
12897 for (s = obfd->sections; s != NULL; s = s->next)
12898 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12899 == SEC_ALLOC)
12900 break;
12901 if (s == NULL)
12902 for (s = obfd->sections; s != NULL; s = s->next)
12903 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12904 break;
12905 }
12906
12907 TOCstart = 0;
12908 if (s != NULL)
12909 TOCstart = s->output_section->vma + s->output_offset;
12910
12911 /* Force alignment. */
12912 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12913 TOCstart -= adjust;
12914 _bfd_set_gp_value (obfd, TOCstart);
12915
12916 if (info != NULL && s != NULL)
12917 {
12918 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12919
12920 if (htab != NULL)
12921 {
12922 if (htab->elf.hgot != NULL)
12923 {
12924 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12925 htab->elf.hgot->root.u.def.section = s;
12926 }
12927 }
12928 else
12929 {
12930 struct bfd_link_hash_entry *bh = NULL;
12931 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12932 s, TOC_BASE_OFF - adjust,
12933 NULL, FALSE, FALSE, &bh);
12934 }
12935 }
12936 return TOCstart;
12937 }
12938
12939 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12940 write out any global entry stubs. */
12941
12942 static bfd_boolean
12943 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12944 {
12945 struct bfd_link_info *info;
12946 struct ppc_link_hash_table *htab;
12947 struct plt_entry *pent;
12948 asection *s;
12949
12950 if (h->root.type == bfd_link_hash_indirect)
12951 return TRUE;
12952
12953 if (!h->pointer_equality_needed)
12954 return TRUE;
12955
12956 if (h->def_regular)
12957 return TRUE;
12958
12959 info = inf;
12960 htab = ppc_hash_table (info);
12961 if (htab == NULL)
12962 return FALSE;
12963
12964 s = htab->glink;
12965 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12966 if (pent->plt.offset != (bfd_vma) -1
12967 && pent->addend == 0)
12968 {
12969 bfd_byte *p;
12970 asection *plt;
12971 bfd_vma off;
12972
12973 p = s->contents + h->root.u.def.value;
12974 plt = htab->elf.splt;
12975 if (!htab->elf.dynamic_sections_created
12976 || h->dynindx == -1)
12977 plt = htab->elf.iplt;
12978 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12979 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12980
12981 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12982 {
12983 info->callbacks->einfo
12984 (_("%P: linkage table error against `%T'\n"),
12985 h->root.root.string);
12986 bfd_set_error (bfd_error_bad_value);
12987 htab->stub_error = TRUE;
12988 }
12989
12990 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12991 if (htab->params->emit_stub_syms)
12992 {
12993 size_t len = strlen (h->root.root.string);
12994 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12995
12996 if (name == NULL)
12997 return FALSE;
12998
12999 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13000 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13001 if (h == NULL)
13002 return FALSE;
13003 if (h->root.type == bfd_link_hash_new)
13004 {
13005 h->root.type = bfd_link_hash_defined;
13006 h->root.u.def.section = s;
13007 h->root.u.def.value = p - s->contents;
13008 h->ref_regular = 1;
13009 h->def_regular = 1;
13010 h->ref_regular_nonweak = 1;
13011 h->forced_local = 1;
13012 h->non_elf = 0;
13013 h->root.linker_def = 1;
13014 }
13015 }
13016
13017 if (PPC_HA (off) != 0)
13018 {
13019 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13020 p += 4;
13021 }
13022 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13023 p += 4;
13024 bfd_put_32 (s->owner, MTCTR_R12, p);
13025 p += 4;
13026 bfd_put_32 (s->owner, BCTR, p);
13027 break;
13028 }
13029 return TRUE;
13030 }
13031
13032 /* Build all the stubs associated with the current output file.
13033 The stubs are kept in a hash table attached to the main linker
13034 hash table. This function is called via gldelf64ppc_finish. */
13035
13036 bfd_boolean
13037 ppc64_elf_build_stubs (struct bfd_link_info *info,
13038 char **stats)
13039 {
13040 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13041 struct map_stub *group;
13042 asection *stub_sec;
13043 bfd_byte *p;
13044 int stub_sec_count = 0;
13045
13046 if (htab == NULL)
13047 return FALSE;
13048
13049 /* Allocate memory to hold the linker stubs. */
13050 for (stub_sec = htab->params->stub_bfd->sections;
13051 stub_sec != NULL;
13052 stub_sec = stub_sec->next)
13053 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
13054 && stub_sec->size != 0)
13055 {
13056 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13057 if (stub_sec->contents == NULL)
13058 return FALSE;
13059 stub_sec->size = 0;
13060 }
13061
13062 if (htab->glink != NULL && htab->glink->size != 0)
13063 {
13064 unsigned int indx;
13065 bfd_vma plt0;
13066
13067 /* Build the .glink plt call stub. */
13068 if (htab->params->emit_stub_syms)
13069 {
13070 struct elf_link_hash_entry *h;
13071 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13072 TRUE, FALSE, FALSE);
13073 if (h == NULL)
13074 return FALSE;
13075 if (h->root.type == bfd_link_hash_new)
13076 {
13077 h->root.type = bfd_link_hash_defined;
13078 h->root.u.def.section = htab->glink;
13079 h->root.u.def.value = 8;
13080 h->ref_regular = 1;
13081 h->def_regular = 1;
13082 h->ref_regular_nonweak = 1;
13083 h->forced_local = 1;
13084 h->non_elf = 0;
13085 h->root.linker_def = 1;
13086 }
13087 }
13088 plt0 = (htab->elf.splt->output_section->vma
13089 + htab->elf.splt->output_offset
13090 - 16);
13091 if (info->emitrelocations)
13092 {
13093 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13094 if (r == NULL)
13095 return FALSE;
13096 r->r_offset = (htab->glink->output_offset
13097 + htab->glink->output_section->vma);
13098 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13099 r->r_addend = plt0;
13100 }
13101 p = htab->glink->contents;
13102 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13103 bfd_put_64 (htab->glink->owner, plt0, p);
13104 p += 8;
13105 if (htab->opd_abi)
13106 {
13107 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13108 p += 4;
13109 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13110 p += 4;
13111 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13112 p += 4;
13113 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13114 p += 4;
13115 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13116 p += 4;
13117 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13118 p += 4;
13119 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13120 p += 4;
13121 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13122 p += 4;
13123 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13124 p += 4;
13125 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13126 p += 4;
13127 }
13128 else
13129 {
13130 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13131 p += 4;
13132 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13133 p += 4;
13134 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13135 p += 4;
13136 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13137 p += 4;
13138 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13139 p += 4;
13140 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13141 p += 4;
13142 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13143 p += 4;
13144 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13145 p += 4;
13146 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13147 p += 4;
13148 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13149 p += 4;
13150 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13151 p += 4;
13152 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13153 p += 4;
13154 }
13155 bfd_put_32 (htab->glink->owner, BCTR, p);
13156 p += 4;
13157 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13158 {
13159 bfd_put_32 (htab->glink->owner, NOP, p);
13160 p += 4;
13161 }
13162
13163 /* Build the .glink lazy link call stubs. */
13164 indx = 0;
13165 while (p < htab->glink->contents + htab->glink->rawsize)
13166 {
13167 if (htab->opd_abi)
13168 {
13169 if (indx < 0x8000)
13170 {
13171 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13172 p += 4;
13173 }
13174 else
13175 {
13176 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13177 p += 4;
13178 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13179 p);
13180 p += 4;
13181 }
13182 }
13183 bfd_put_32 (htab->glink->owner,
13184 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13185 indx++;
13186 p += 4;
13187 }
13188
13189 /* Build .glink global entry stubs. */
13190 if (htab->glink->size > htab->glink->rawsize)
13191 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13192 }
13193
13194 if (htab->brlt != NULL && htab->brlt->size != 0)
13195 {
13196 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13197 htab->brlt->size);
13198 if (htab->brlt->contents == NULL)
13199 return FALSE;
13200 }
13201 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13202 {
13203 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13204 htab->relbrlt->size);
13205 if (htab->relbrlt->contents == NULL)
13206 return FALSE;
13207 }
13208
13209 /* Build the stubs as directed by the stub hash table. */
13210 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13211
13212 for (group = htab->group; group != NULL; group = group->next)
13213 if (group->needs_save_res)
13214 {
13215 stub_sec = group->stub_sec;
13216 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13217 htab->sfpr->size);
13218 if (htab->params->emit_stub_syms)
13219 {
13220 unsigned int i;
13221
13222 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13223 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13224 return FALSE;
13225 }
13226 stub_sec->size += htab->sfpr->size;
13227 }
13228
13229 if (htab->relbrlt != NULL)
13230 htab->relbrlt->reloc_count = 0;
13231
13232 if (htab->params->plt_stub_align != 0)
13233 for (stub_sec = htab->params->stub_bfd->sections;
13234 stub_sec != NULL;
13235 stub_sec = stub_sec->next)
13236 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13237 stub_sec->size = ((stub_sec->size
13238 + (1 << htab->params->plt_stub_align) - 1)
13239 & -(1 << htab->params->plt_stub_align));
13240
13241 for (stub_sec = htab->params->stub_bfd->sections;
13242 stub_sec != NULL;
13243 stub_sec = stub_sec->next)
13244 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13245 {
13246 stub_sec_count += 1;
13247 if (stub_sec->rawsize != stub_sec->size
13248 && (htab->stub_iteration <= STUB_SHRINK_ITER
13249 || stub_sec->rawsize < stub_sec->size))
13250 break;
13251 }
13252
13253 /* Note that the glink_eh_frame check here is not only testing that
13254 the generated size matched the calculated size but also that
13255 bfd_elf_discard_info didn't make any changes to the section. */
13256 if (stub_sec != NULL
13257 || (htab->glink_eh_frame != NULL
13258 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13259 {
13260 htab->stub_error = TRUE;
13261 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13262 }
13263
13264 if (htab->stub_error)
13265 return FALSE;
13266
13267 if (stats != NULL)
13268 {
13269 *stats = bfd_malloc (500);
13270 if (*stats == NULL)
13271 return FALSE;
13272
13273 sprintf (*stats, _("linker stubs in %u group%s\n"
13274 " branch %lu\n"
13275 " toc adjust %lu\n"
13276 " long branch %lu\n"
13277 " long toc adj %lu\n"
13278 " plt call %lu\n"
13279 " plt call toc %lu\n"
13280 " global entry %lu"),
13281 stub_sec_count,
13282 stub_sec_count == 1 ? "" : "s",
13283 htab->stub_count[ppc_stub_long_branch - 1],
13284 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13285 htab->stub_count[ppc_stub_plt_branch - 1],
13286 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13287 htab->stub_count[ppc_stub_plt_call - 1],
13288 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13289 htab->stub_count[ppc_stub_global_entry - 1]);
13290 }
13291 return TRUE;
13292 }
13293
13294 /* What to do when ld finds relocations against symbols defined in
13295 discarded sections. */
13296
13297 static unsigned int
13298 ppc64_elf_action_discarded (asection *sec)
13299 {
13300 if (strcmp (".opd", sec->name) == 0)
13301 return 0;
13302
13303 if (strcmp (".toc", sec->name) == 0)
13304 return 0;
13305
13306 if (strcmp (".toc1", sec->name) == 0)
13307 return 0;
13308
13309 return _bfd_elf_default_action_discarded (sec);
13310 }
13311
13312 /* The RELOCATE_SECTION function is called by the ELF backend linker
13313 to handle the relocations for a section.
13314
13315 The relocs are always passed as Rela structures; if the section
13316 actually uses Rel structures, the r_addend field will always be
13317 zero.
13318
13319 This function is responsible for adjust the section contents as
13320 necessary, and (if using Rela relocs and generating a
13321 relocatable output file) adjusting the reloc addend as
13322 necessary.
13323
13324 This function does not have to worry about setting the reloc
13325 address or the reloc symbol index.
13326
13327 LOCAL_SYMS is a pointer to the swapped in local symbols.
13328
13329 LOCAL_SECTIONS is an array giving the section in the input file
13330 corresponding to the st_shndx field of each local symbol.
13331
13332 The global hash table entry for the global symbols can be found
13333 via elf_sym_hashes (input_bfd).
13334
13335 When generating relocatable output, this function must handle
13336 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13337 going to be the section symbol corresponding to the output
13338 section, which means that the addend must be adjusted
13339 accordingly. */
13340
13341 static bfd_boolean
13342 ppc64_elf_relocate_section (bfd *output_bfd,
13343 struct bfd_link_info *info,
13344 bfd *input_bfd,
13345 asection *input_section,
13346 bfd_byte *contents,
13347 Elf_Internal_Rela *relocs,
13348 Elf_Internal_Sym *local_syms,
13349 asection **local_sections)
13350 {
13351 struct ppc_link_hash_table *htab;
13352 Elf_Internal_Shdr *symtab_hdr;
13353 struct elf_link_hash_entry **sym_hashes;
13354 Elf_Internal_Rela *rel;
13355 Elf_Internal_Rela *wrel;
13356 Elf_Internal_Rela *relend;
13357 Elf_Internal_Rela outrel;
13358 bfd_byte *loc;
13359 struct got_entry **local_got_ents;
13360 bfd_vma TOCstart;
13361 bfd_boolean ret = TRUE;
13362 bfd_boolean is_opd;
13363 /* Assume 'at' branch hints. */
13364 bfd_boolean is_isa_v2 = TRUE;
13365 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13366
13367 /* Initialize howto table if needed. */
13368 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13369 ppc_howto_init ();
13370
13371 htab = ppc_hash_table (info);
13372 if (htab == NULL)
13373 return FALSE;
13374
13375 /* Don't relocate stub sections. */
13376 if (input_section->owner == htab->params->stub_bfd)
13377 return TRUE;
13378
13379 BFD_ASSERT (is_ppc64_elf (input_bfd));
13380
13381 local_got_ents = elf_local_got_ents (input_bfd);
13382 TOCstart = elf_gp (output_bfd);
13383 symtab_hdr = &elf_symtab_hdr (input_bfd);
13384 sym_hashes = elf_sym_hashes (input_bfd);
13385 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13386
13387 rel = wrel = relocs;
13388 relend = relocs + input_section->reloc_count;
13389 for (; rel < relend; wrel++, rel++)
13390 {
13391 enum elf_ppc64_reloc_type r_type;
13392 bfd_vma addend;
13393 bfd_reloc_status_type r;
13394 Elf_Internal_Sym *sym;
13395 asection *sec;
13396 struct elf_link_hash_entry *h_elf;
13397 struct ppc_link_hash_entry *h;
13398 struct ppc_link_hash_entry *fdh;
13399 const char *sym_name;
13400 unsigned long r_symndx, toc_symndx;
13401 bfd_vma toc_addend;
13402 unsigned char tls_mask, tls_gd, tls_type;
13403 unsigned char sym_type;
13404 bfd_vma relocation;
13405 bfd_boolean unresolved_reloc;
13406 bfd_boolean warned;
13407 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13408 unsigned int insn;
13409 unsigned int mask;
13410 struct ppc_stub_hash_entry *stub_entry;
13411 bfd_vma max_br_offset;
13412 bfd_vma from;
13413 Elf_Internal_Rela orig_rel;
13414 reloc_howto_type *howto;
13415 struct reloc_howto_struct alt_howto;
13416
13417 again:
13418 orig_rel = *rel;
13419
13420 r_type = ELF64_R_TYPE (rel->r_info);
13421 r_symndx = ELF64_R_SYM (rel->r_info);
13422
13423 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13424 symbol of the previous ADDR64 reloc. The symbol gives us the
13425 proper TOC base to use. */
13426 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13427 && wrel != relocs
13428 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13429 && is_opd)
13430 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13431
13432 sym = NULL;
13433 sec = NULL;
13434 h_elf = NULL;
13435 sym_name = NULL;
13436 unresolved_reloc = FALSE;
13437 warned = FALSE;
13438
13439 if (r_symndx < symtab_hdr->sh_info)
13440 {
13441 /* It's a local symbol. */
13442 struct _opd_sec_data *opd;
13443
13444 sym = local_syms + r_symndx;
13445 sec = local_sections[r_symndx];
13446 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13447 sym_type = ELF64_ST_TYPE (sym->st_info);
13448 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13449 opd = get_opd_info (sec);
13450 if (opd != NULL && opd->adjust != NULL)
13451 {
13452 long adjust = opd->adjust[OPD_NDX (sym->st_value
13453 + rel->r_addend)];
13454 if (adjust == -1)
13455 relocation = 0;
13456 else
13457 {
13458 /* If this is a relocation against the opd section sym
13459 and we have edited .opd, adjust the reloc addend so
13460 that ld -r and ld --emit-relocs output is correct.
13461 If it is a reloc against some other .opd symbol,
13462 then the symbol value will be adjusted later. */
13463 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13464 rel->r_addend += adjust;
13465 else
13466 relocation += adjust;
13467 }
13468 }
13469 }
13470 else
13471 {
13472 bfd_boolean ignored;
13473
13474 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13475 r_symndx, symtab_hdr, sym_hashes,
13476 h_elf, sec, relocation,
13477 unresolved_reloc, warned, ignored);
13478 sym_name = h_elf->root.root.string;
13479 sym_type = h_elf->type;
13480 if (sec != NULL
13481 && sec->owner == output_bfd
13482 && strcmp (sec->name, ".opd") == 0)
13483 {
13484 /* This is a symbol defined in a linker script. All
13485 such are defined in output sections, even those
13486 defined by simple assignment from a symbol defined in
13487 an input section. Transfer the symbol to an
13488 appropriate input .opd section, so that a branch to
13489 this symbol will be mapped to the location specified
13490 by the opd entry. */
13491 struct bfd_link_order *lo;
13492 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13493 if (lo->type == bfd_indirect_link_order)
13494 {
13495 asection *isec = lo->u.indirect.section;
13496 if (h_elf->root.u.def.value >= isec->output_offset
13497 && h_elf->root.u.def.value < (isec->output_offset
13498 + isec->size))
13499 {
13500 h_elf->root.u.def.value -= isec->output_offset;
13501 h_elf->root.u.def.section = isec;
13502 sec = isec;
13503 break;
13504 }
13505 }
13506 }
13507 }
13508 h = (struct ppc_link_hash_entry *) h_elf;
13509
13510 if (sec != NULL && discarded_section (sec))
13511 {
13512 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13513 input_bfd, input_section,
13514 contents + rel->r_offset);
13515 wrel->r_offset = rel->r_offset;
13516 wrel->r_info = 0;
13517 wrel->r_addend = 0;
13518
13519 /* For ld -r, remove relocations in debug sections against
13520 sections defined in discarded sections. Not done for
13521 non-debug to preserve relocs in .eh_frame which the
13522 eh_frame editing code expects to be present. */
13523 if (bfd_link_relocatable (info)
13524 && (input_section->flags & SEC_DEBUGGING))
13525 wrel--;
13526
13527 continue;
13528 }
13529
13530 if (bfd_link_relocatable (info))
13531 goto copy_reloc;
13532
13533 if (h != NULL && &h->elf == htab->elf.hgot)
13534 {
13535 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13536 sec = bfd_abs_section_ptr;
13537 unresolved_reloc = FALSE;
13538 }
13539
13540 /* TLS optimizations. Replace instruction sequences and relocs
13541 based on information we collected in tls_optimize. We edit
13542 RELOCS so that --emit-relocs will output something sensible
13543 for the final instruction stream. */
13544 tls_mask = 0;
13545 tls_gd = 0;
13546 toc_symndx = 0;
13547 if (h != NULL)
13548 tls_mask = h->tls_mask;
13549 else if (local_got_ents != NULL)
13550 {
13551 struct plt_entry **local_plt = (struct plt_entry **)
13552 (local_got_ents + symtab_hdr->sh_info);
13553 unsigned char *lgot_masks = (unsigned char *)
13554 (local_plt + symtab_hdr->sh_info);
13555 tls_mask = lgot_masks[r_symndx];
13556 }
13557 if (tls_mask == 0
13558 && (r_type == R_PPC64_TLS
13559 || r_type == R_PPC64_TLSGD
13560 || r_type == R_PPC64_TLSLD))
13561 {
13562 /* Check for toc tls entries. */
13563 unsigned char *toc_tls;
13564
13565 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13566 &local_syms, rel, input_bfd))
13567 return FALSE;
13568
13569 if (toc_tls)
13570 tls_mask = *toc_tls;
13571 }
13572
13573 /* Check that tls relocs are used with tls syms, and non-tls
13574 relocs are used with non-tls syms. */
13575 if (r_symndx != STN_UNDEF
13576 && r_type != R_PPC64_NONE
13577 && (h == NULL
13578 || h->elf.root.type == bfd_link_hash_defined
13579 || h->elf.root.type == bfd_link_hash_defweak)
13580 && (IS_PPC64_TLS_RELOC (r_type)
13581 != (sym_type == STT_TLS
13582 || (sym_type == STT_SECTION
13583 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13584 {
13585 if (tls_mask != 0
13586 && (r_type == R_PPC64_TLS
13587 || r_type == R_PPC64_TLSGD
13588 || r_type == R_PPC64_TLSLD))
13589 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13590 ;
13591 else
13592 info->callbacks->einfo
13593 (!IS_PPC64_TLS_RELOC (r_type)
13594 /* xgettext:c-format */
13595 ? _("%H: %s used with TLS symbol `%T'\n")
13596 /* xgettext:c-format */
13597 : _("%H: %s used with non-TLS symbol `%T'\n"),
13598 input_bfd, input_section, rel->r_offset,
13599 ppc64_elf_howto_table[r_type]->name,
13600 sym_name);
13601 }
13602
13603 /* Ensure reloc mapping code below stays sane. */
13604 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13605 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13606 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13607 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13608 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13609 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13610 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13611 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13612 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13613 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13614 abort ();
13615
13616 switch (r_type)
13617 {
13618 default:
13619 break;
13620
13621 case R_PPC64_LO_DS_OPT:
13622 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13623 if ((insn & (0x3f << 26)) != 58u << 26)
13624 abort ();
13625 insn += (14u << 26) - (58u << 26);
13626 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13627 r_type = R_PPC64_TOC16_LO;
13628 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13629 break;
13630
13631 case R_PPC64_TOC16:
13632 case R_PPC64_TOC16_LO:
13633 case R_PPC64_TOC16_DS:
13634 case R_PPC64_TOC16_LO_DS:
13635 {
13636 /* Check for toc tls entries. */
13637 unsigned char *toc_tls;
13638 int retval;
13639
13640 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13641 &local_syms, rel, input_bfd);
13642 if (retval == 0)
13643 return FALSE;
13644
13645 if (toc_tls)
13646 {
13647 tls_mask = *toc_tls;
13648 if (r_type == R_PPC64_TOC16_DS
13649 || r_type == R_PPC64_TOC16_LO_DS)
13650 {
13651 if (tls_mask != 0
13652 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13653 goto toctprel;
13654 }
13655 else
13656 {
13657 /* If we found a GD reloc pair, then we might be
13658 doing a GD->IE transition. */
13659 if (retval == 2)
13660 {
13661 tls_gd = TLS_TPRELGD;
13662 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13663 goto tls_ldgd_opt;
13664 }
13665 else if (retval == 3)
13666 {
13667 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13668 goto tls_ldgd_opt;
13669 }
13670 }
13671 }
13672 }
13673 break;
13674
13675 case R_PPC64_GOT_TPREL16_HI:
13676 case R_PPC64_GOT_TPREL16_HA:
13677 if (tls_mask != 0
13678 && (tls_mask & TLS_TPREL) == 0)
13679 {
13680 rel->r_offset -= d_offset;
13681 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13682 r_type = R_PPC64_NONE;
13683 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13684 }
13685 break;
13686
13687 case R_PPC64_GOT_TPREL16_DS:
13688 case R_PPC64_GOT_TPREL16_LO_DS:
13689 if (tls_mask != 0
13690 && (tls_mask & TLS_TPREL) == 0)
13691 {
13692 toctprel:
13693 insn = bfd_get_32 (input_bfd,
13694 contents + rel->r_offset - d_offset);
13695 insn &= 31 << 21;
13696 insn |= 0x3c0d0000; /* addis 0,13,0 */
13697 bfd_put_32 (input_bfd, insn,
13698 contents + rel->r_offset - d_offset);
13699 r_type = R_PPC64_TPREL16_HA;
13700 if (toc_symndx != 0)
13701 {
13702 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13703 rel->r_addend = toc_addend;
13704 /* We changed the symbol. Start over in order to
13705 get h, sym, sec etc. right. */
13706 goto again;
13707 }
13708 else
13709 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13710 }
13711 break;
13712
13713 case R_PPC64_TLS:
13714 if (tls_mask != 0
13715 && (tls_mask & TLS_TPREL) == 0)
13716 {
13717 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13718 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13719 if (insn == 0)
13720 abort ();
13721 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13722 /* Was PPC64_TLS which sits on insn boundary, now
13723 PPC64_TPREL16_LO which is at low-order half-word. */
13724 rel->r_offset += d_offset;
13725 r_type = R_PPC64_TPREL16_LO;
13726 if (toc_symndx != 0)
13727 {
13728 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13729 rel->r_addend = toc_addend;
13730 /* We changed the symbol. Start over in order to
13731 get h, sym, sec etc. right. */
13732 goto again;
13733 }
13734 else
13735 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13736 }
13737 break;
13738
13739 case R_PPC64_GOT_TLSGD16_HI:
13740 case R_PPC64_GOT_TLSGD16_HA:
13741 tls_gd = TLS_TPRELGD;
13742 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13743 goto tls_gdld_hi;
13744 break;
13745
13746 case R_PPC64_GOT_TLSLD16_HI:
13747 case R_PPC64_GOT_TLSLD16_HA:
13748 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13749 {
13750 tls_gdld_hi:
13751 if ((tls_mask & tls_gd) != 0)
13752 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13753 + R_PPC64_GOT_TPREL16_DS);
13754 else
13755 {
13756 rel->r_offset -= d_offset;
13757 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13758 r_type = R_PPC64_NONE;
13759 }
13760 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13761 }
13762 break;
13763
13764 case R_PPC64_GOT_TLSGD16:
13765 case R_PPC64_GOT_TLSGD16_LO:
13766 tls_gd = TLS_TPRELGD;
13767 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13768 goto tls_ldgd_opt;
13769 break;
13770
13771 case R_PPC64_GOT_TLSLD16:
13772 case R_PPC64_GOT_TLSLD16_LO:
13773 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13774 {
13775 unsigned int insn1, insn2, insn3;
13776 bfd_vma offset;
13777
13778 tls_ldgd_opt:
13779 offset = (bfd_vma) -1;
13780 /* If not using the newer R_PPC64_TLSGD/LD to mark
13781 __tls_get_addr calls, we must trust that the call
13782 stays with its arg setup insns, ie. that the next
13783 reloc is the __tls_get_addr call associated with
13784 the current reloc. Edit both insns. */
13785 if (input_section->has_tls_get_addr_call
13786 && rel + 1 < relend
13787 && branch_reloc_hash_match (input_bfd, rel + 1,
13788 htab->tls_get_addr,
13789 htab->tls_get_addr_fd))
13790 offset = rel[1].r_offset;
13791 /* We read the low GOT_TLS (or TOC16) insn because we
13792 need to keep the destination reg. It may be
13793 something other than the usual r3, and moved to r3
13794 before the call by intervening code. */
13795 insn1 = bfd_get_32 (input_bfd,
13796 contents + rel->r_offset - d_offset);
13797 if ((tls_mask & tls_gd) != 0)
13798 {
13799 /* IE */
13800 insn1 &= (0x1f << 21) | (0x1f << 16);
13801 insn1 |= 58 << 26; /* ld */
13802 insn2 = 0x7c636a14; /* add 3,3,13 */
13803 if (offset != (bfd_vma) -1)
13804 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13805 if ((tls_mask & TLS_EXPLICIT) == 0)
13806 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13807 + R_PPC64_GOT_TPREL16_DS);
13808 else
13809 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13810 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13811 }
13812 else
13813 {
13814 /* LE */
13815 insn1 &= 0x1f << 21;
13816 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13817 insn2 = 0x38630000; /* addi 3,3,0 */
13818 if (tls_gd == 0)
13819 {
13820 /* Was an LD reloc. */
13821 if (toc_symndx)
13822 sec = local_sections[toc_symndx];
13823 for (r_symndx = 0;
13824 r_symndx < symtab_hdr->sh_info;
13825 r_symndx++)
13826 if (local_sections[r_symndx] == sec)
13827 break;
13828 if (r_symndx >= symtab_hdr->sh_info)
13829 r_symndx = STN_UNDEF;
13830 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13831 if (r_symndx != STN_UNDEF)
13832 rel->r_addend -= (local_syms[r_symndx].st_value
13833 + sec->output_offset
13834 + sec->output_section->vma);
13835 }
13836 else if (toc_symndx != 0)
13837 {
13838 r_symndx = toc_symndx;
13839 rel->r_addend = toc_addend;
13840 }
13841 r_type = R_PPC64_TPREL16_HA;
13842 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13843 if (offset != (bfd_vma) -1)
13844 {
13845 rel[1].r_info = ELF64_R_INFO (r_symndx,
13846 R_PPC64_TPREL16_LO);
13847 rel[1].r_offset = offset + d_offset;
13848 rel[1].r_addend = rel->r_addend;
13849 }
13850 }
13851 bfd_put_32 (input_bfd, insn1,
13852 contents + rel->r_offset - d_offset);
13853 if (offset != (bfd_vma) -1)
13854 {
13855 insn3 = bfd_get_32 (input_bfd,
13856 contents + offset + 4);
13857 if (insn3 == NOP
13858 || insn3 == CROR_151515 || insn3 == CROR_313131)
13859 {
13860 rel[1].r_offset += 4;
13861 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13862 insn2 = NOP;
13863 }
13864 bfd_put_32 (input_bfd, insn2, contents + offset);
13865 }
13866 if ((tls_mask & tls_gd) == 0
13867 && (tls_gd == 0 || toc_symndx != 0))
13868 {
13869 /* We changed the symbol. Start over in order
13870 to get h, sym, sec etc. right. */
13871 goto again;
13872 }
13873 }
13874 break;
13875
13876 case R_PPC64_TLSGD:
13877 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13878 {
13879 unsigned int insn2, insn3;
13880 bfd_vma offset = rel->r_offset;
13881
13882 if ((tls_mask & TLS_TPRELGD) != 0)
13883 {
13884 /* IE */
13885 r_type = R_PPC64_NONE;
13886 insn2 = 0x7c636a14; /* add 3,3,13 */
13887 }
13888 else
13889 {
13890 /* LE */
13891 if (toc_symndx != 0)
13892 {
13893 r_symndx = toc_symndx;
13894 rel->r_addend = toc_addend;
13895 }
13896 r_type = R_PPC64_TPREL16_LO;
13897 rel->r_offset = offset + d_offset;
13898 insn2 = 0x38630000; /* addi 3,3,0 */
13899 }
13900 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13901 /* Zap the reloc on the _tls_get_addr call too. */
13902 BFD_ASSERT (offset == rel[1].r_offset);
13903 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13904 insn3 = bfd_get_32 (input_bfd,
13905 contents + offset + 4);
13906 if (insn3 == NOP
13907 || insn3 == CROR_151515 || insn3 == CROR_313131)
13908 {
13909 rel->r_offset += 4;
13910 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13911 insn2 = NOP;
13912 }
13913 bfd_put_32 (input_bfd, insn2, contents + offset);
13914 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13915 goto again;
13916 }
13917 break;
13918
13919 case R_PPC64_TLSLD:
13920 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13921 {
13922 unsigned int insn2, insn3;
13923 bfd_vma offset = rel->r_offset;
13924
13925 if (toc_symndx)
13926 sec = local_sections[toc_symndx];
13927 for (r_symndx = 0;
13928 r_symndx < symtab_hdr->sh_info;
13929 r_symndx++)
13930 if (local_sections[r_symndx] == sec)
13931 break;
13932 if (r_symndx >= symtab_hdr->sh_info)
13933 r_symndx = STN_UNDEF;
13934 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13935 if (r_symndx != STN_UNDEF)
13936 rel->r_addend -= (local_syms[r_symndx].st_value
13937 + sec->output_offset
13938 + sec->output_section->vma);
13939
13940 r_type = R_PPC64_TPREL16_LO;
13941 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13942 rel->r_offset = offset + d_offset;
13943 /* Zap the reloc on the _tls_get_addr call too. */
13944 BFD_ASSERT (offset == rel[1].r_offset);
13945 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13946 insn2 = 0x38630000; /* addi 3,3,0 */
13947 insn3 = bfd_get_32 (input_bfd,
13948 contents + offset + 4);
13949 if (insn3 == NOP
13950 || insn3 == CROR_151515 || insn3 == CROR_313131)
13951 {
13952 rel->r_offset += 4;
13953 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13954 insn2 = NOP;
13955 }
13956 bfd_put_32 (input_bfd, insn2, contents + offset);
13957 goto again;
13958 }
13959 break;
13960
13961 case R_PPC64_DTPMOD64:
13962 if (rel + 1 < relend
13963 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13964 && rel[1].r_offset == rel->r_offset + 8)
13965 {
13966 if ((tls_mask & TLS_GD) == 0)
13967 {
13968 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13969 if ((tls_mask & TLS_TPRELGD) != 0)
13970 r_type = R_PPC64_TPREL64;
13971 else
13972 {
13973 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13974 r_type = R_PPC64_NONE;
13975 }
13976 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13977 }
13978 }
13979 else
13980 {
13981 if ((tls_mask & TLS_LD) == 0)
13982 {
13983 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13984 r_type = R_PPC64_NONE;
13985 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13986 }
13987 }
13988 break;
13989
13990 case R_PPC64_TPREL64:
13991 if ((tls_mask & TLS_TPREL) == 0)
13992 {
13993 r_type = R_PPC64_NONE;
13994 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13995 }
13996 break;
13997
13998 case R_PPC64_ENTRY:
13999 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14000 if (!bfd_link_pic (info)
14001 && !info->traditional_format
14002 && relocation + 0x80008000 <= 0xffffffff)
14003 {
14004 unsigned int insn1, insn2;
14005
14006 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14007 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14008 if ((insn1 & ~0xfffc) == LD_R2_0R12
14009 && insn2 == ADD_R2_R2_R12)
14010 {
14011 bfd_put_32 (input_bfd,
14012 LIS_R2 + PPC_HA (relocation),
14013 contents + rel->r_offset);
14014 bfd_put_32 (input_bfd,
14015 ADDI_R2_R2 + PPC_LO (relocation),
14016 contents + rel->r_offset + 4);
14017 }
14018 }
14019 else
14020 {
14021 relocation -= (rel->r_offset
14022 + input_section->output_offset
14023 + input_section->output_section->vma);
14024 if (relocation + 0x80008000 <= 0xffffffff)
14025 {
14026 unsigned int insn1, insn2;
14027
14028 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14029 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14030 if ((insn1 & ~0xfffc) == LD_R2_0R12
14031 && insn2 == ADD_R2_R2_R12)
14032 {
14033 bfd_put_32 (input_bfd,
14034 ADDIS_R2_R12 + PPC_HA (relocation),
14035 contents + rel->r_offset);
14036 bfd_put_32 (input_bfd,
14037 ADDI_R2_R2 + PPC_LO (relocation),
14038 contents + rel->r_offset + 4);
14039 }
14040 }
14041 }
14042 break;
14043
14044 case R_PPC64_REL16_HA:
14045 /* If we are generating a non-PIC executable, edit
14046 . 0: addis 2,12,.TOC.-0b@ha
14047 . addi 2,2,.TOC.-0b@l
14048 used by ELFv2 global entry points to set up r2, to
14049 . lis 2,.TOC.@ha
14050 . addi 2,2,.TOC.@l
14051 if .TOC. is in range. */
14052 if (!bfd_link_pic (info)
14053 && !info->traditional_format
14054 && !htab->opd_abi
14055 && rel->r_addend == d_offset
14056 && h != NULL && &h->elf == htab->elf.hgot
14057 && rel + 1 < relend
14058 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14059 && rel[1].r_offset == rel->r_offset + 4
14060 && rel[1].r_addend == rel->r_addend + 4
14061 && relocation + 0x80008000 <= 0xffffffff)
14062 {
14063 unsigned int insn1, insn2;
14064 bfd_vma offset = rel->r_offset - d_offset;
14065 insn1 = bfd_get_32 (input_bfd, contents + offset);
14066 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14067 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14068 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14069 {
14070 r_type = R_PPC64_ADDR16_HA;
14071 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14072 rel->r_addend -= d_offset;
14073 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14074 rel[1].r_addend -= d_offset + 4;
14075 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14076 }
14077 }
14078 break;
14079 }
14080
14081 /* Handle other relocations that tweak non-addend part of insn. */
14082 insn = 0;
14083 max_br_offset = 1 << 25;
14084 addend = rel->r_addend;
14085 reloc_dest = DEST_NORMAL;
14086 switch (r_type)
14087 {
14088 default:
14089 break;
14090
14091 case R_PPC64_TOCSAVE:
14092 if (relocation + addend == (rel->r_offset
14093 + input_section->output_offset
14094 + input_section->output_section->vma)
14095 && tocsave_find (htab, NO_INSERT,
14096 &local_syms, rel, input_bfd))
14097 {
14098 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14099 if (insn == NOP
14100 || insn == CROR_151515 || insn == CROR_313131)
14101 bfd_put_32 (input_bfd,
14102 STD_R2_0R1 + STK_TOC (htab),
14103 contents + rel->r_offset);
14104 }
14105 break;
14106
14107 /* Branch taken prediction relocations. */
14108 case R_PPC64_ADDR14_BRTAKEN:
14109 case R_PPC64_REL14_BRTAKEN:
14110 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14111 /* Fall through. */
14112
14113 /* Branch not taken prediction relocations. */
14114 case R_PPC64_ADDR14_BRNTAKEN:
14115 case R_PPC64_REL14_BRNTAKEN:
14116 insn |= bfd_get_32 (input_bfd,
14117 contents + rel->r_offset) & ~(0x01 << 21);
14118 /* Fall through. */
14119
14120 case R_PPC64_REL14:
14121 max_br_offset = 1 << 15;
14122 /* Fall through. */
14123
14124 case R_PPC64_REL24:
14125 /* Calls to functions with a different TOC, such as calls to
14126 shared objects, need to alter the TOC pointer. This is
14127 done using a linkage stub. A REL24 branching to these
14128 linkage stubs needs to be followed by a nop, as the nop
14129 will be replaced with an instruction to restore the TOC
14130 base pointer. */
14131 fdh = h;
14132 if (h != NULL
14133 && h->oh != NULL
14134 && h->oh->is_func_descriptor)
14135 fdh = ppc_follow_link (h->oh);
14136 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14137 htab);
14138 if (stub_entry != NULL
14139 && (stub_entry->stub_type == ppc_stub_plt_call
14140 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14141 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14142 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14143 {
14144 bfd_boolean can_plt_call = FALSE;
14145
14146 /* All of these stubs will modify r2, so there must be a
14147 branch and link followed by a nop. The nop is
14148 replaced by an insn to restore r2. */
14149 if (rel->r_offset + 8 <= input_section->size)
14150 {
14151 unsigned long br;
14152
14153 br = bfd_get_32 (input_bfd,
14154 contents + rel->r_offset);
14155 if ((br & 1) != 0)
14156 {
14157 unsigned long nop;
14158
14159 nop = bfd_get_32 (input_bfd,
14160 contents + rel->r_offset + 4);
14161 if (nop == NOP
14162 || nop == CROR_151515 || nop == CROR_313131)
14163 {
14164 if (h != NULL
14165 && (h == htab->tls_get_addr_fd
14166 || h == htab->tls_get_addr)
14167 && htab->params->tls_get_addr_opt)
14168 {
14169 /* Special stub used, leave nop alone. */
14170 }
14171 else
14172 bfd_put_32 (input_bfd,
14173 LD_R2_0R1 + STK_TOC (htab),
14174 contents + rel->r_offset + 4);
14175 can_plt_call = TRUE;
14176 }
14177 }
14178 }
14179
14180 if (!can_plt_call && h != NULL)
14181 {
14182 const char *name = h->elf.root.root.string;
14183
14184 if (*name == '.')
14185 ++name;
14186
14187 if (strncmp (name, "__libc_start_main", 17) == 0
14188 && (name[17] == 0 || name[17] == '@'))
14189 {
14190 /* Allow crt1 branch to go via a toc adjusting
14191 stub. Other calls that never return could do
14192 the same, if we could detect such. */
14193 can_plt_call = TRUE;
14194 }
14195 }
14196
14197 if (!can_plt_call)
14198 {
14199 /* g++ as of 20130507 emits self-calls without a
14200 following nop. This is arguably wrong since we
14201 have conflicting information. On the one hand a
14202 global symbol and on the other a local call
14203 sequence, but don't error for this special case.
14204 It isn't possible to cheaply verify we have
14205 exactly such a call. Allow all calls to the same
14206 section. */
14207 asection *code_sec = sec;
14208
14209 if (get_opd_info (sec) != NULL)
14210 {
14211 bfd_vma off = (relocation + addend
14212 - sec->output_section->vma
14213 - sec->output_offset);
14214
14215 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14216 }
14217 if (code_sec == input_section)
14218 can_plt_call = TRUE;
14219 }
14220
14221 if (!can_plt_call)
14222 {
14223 if (stub_entry->stub_type == ppc_stub_plt_call
14224 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14225 info->callbacks->einfo
14226 /* xgettext:c-format */
14227 (_("%H: call to `%T' lacks nop, can't restore toc; "
14228 "recompile with -fPIC\n"),
14229 input_bfd, input_section, rel->r_offset, sym_name);
14230 else
14231 info->callbacks->einfo
14232 /* xgettext:c-format */
14233 (_("%H: call to `%T' lacks nop, can't restore toc; "
14234 "(-mcmodel=small toc adjust stub)\n"),
14235 input_bfd, input_section, rel->r_offset, sym_name);
14236
14237 bfd_set_error (bfd_error_bad_value);
14238 ret = FALSE;
14239 }
14240
14241 if (can_plt_call
14242 && (stub_entry->stub_type == ppc_stub_plt_call
14243 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14244 unresolved_reloc = FALSE;
14245 }
14246
14247 if ((stub_entry == NULL
14248 || stub_entry->stub_type == ppc_stub_long_branch
14249 || stub_entry->stub_type == ppc_stub_plt_branch)
14250 && get_opd_info (sec) != NULL)
14251 {
14252 /* The branch destination is the value of the opd entry. */
14253 bfd_vma off = (relocation + addend
14254 - sec->output_section->vma
14255 - sec->output_offset);
14256 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14257 if (dest != (bfd_vma) -1)
14258 {
14259 relocation = dest;
14260 addend = 0;
14261 reloc_dest = DEST_OPD;
14262 }
14263 }
14264
14265 /* If the branch is out of reach we ought to have a long
14266 branch stub. */
14267 from = (rel->r_offset
14268 + input_section->output_offset
14269 + input_section->output_section->vma);
14270
14271 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14272 ? fdh->elf.other
14273 : sym->st_other);
14274
14275 if (stub_entry != NULL
14276 && (stub_entry->stub_type == ppc_stub_long_branch
14277 || stub_entry->stub_type == ppc_stub_plt_branch)
14278 && (r_type == R_PPC64_ADDR14_BRTAKEN
14279 || r_type == R_PPC64_ADDR14_BRNTAKEN
14280 || (relocation + addend - from + max_br_offset
14281 < 2 * max_br_offset)))
14282 /* Don't use the stub if this branch is in range. */
14283 stub_entry = NULL;
14284
14285 if (stub_entry != NULL)
14286 {
14287 /* Munge up the value and addend so that we call the stub
14288 rather than the procedure directly. */
14289 asection *stub_sec = stub_entry->group->stub_sec;
14290
14291 if (stub_entry->stub_type == ppc_stub_save_res)
14292 relocation += (stub_sec->output_offset
14293 + stub_sec->output_section->vma
14294 + stub_sec->size - htab->sfpr->size
14295 - htab->sfpr->output_offset
14296 - htab->sfpr->output_section->vma);
14297 else
14298 relocation = (stub_entry->stub_offset
14299 + stub_sec->output_offset
14300 + stub_sec->output_section->vma);
14301 addend = 0;
14302 reloc_dest = DEST_STUB;
14303
14304 if ((stub_entry->stub_type == ppc_stub_plt_call
14305 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14306 && (ALWAYS_EMIT_R2SAVE
14307 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14308 && rel + 1 < relend
14309 && rel[1].r_offset == rel->r_offset + 4
14310 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14311 relocation += 4;
14312 }
14313
14314 if (insn != 0)
14315 {
14316 if (is_isa_v2)
14317 {
14318 /* Set 'a' bit. This is 0b00010 in BO field for branch
14319 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14320 for branch on CTR insns (BO == 1a00t or 1a01t). */
14321 if ((insn & (0x14 << 21)) == (0x04 << 21))
14322 insn |= 0x02 << 21;
14323 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14324 insn |= 0x08 << 21;
14325 else
14326 break;
14327 }
14328 else
14329 {
14330 /* Invert 'y' bit if not the default. */
14331 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14332 insn ^= 0x01 << 21;
14333 }
14334
14335 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14336 }
14337
14338 /* NOP out calls to undefined weak functions.
14339 We can thus call a weak function without first
14340 checking whether the function is defined. */
14341 else if (h != NULL
14342 && h->elf.root.type == bfd_link_hash_undefweak
14343 && h->elf.dynindx == -1
14344 && r_type == R_PPC64_REL24
14345 && relocation == 0
14346 && addend == 0)
14347 {
14348 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14349 goto copy_reloc;
14350 }
14351 break;
14352 }
14353
14354 /* Set `addend'. */
14355 tls_type = 0;
14356 switch (r_type)
14357 {
14358 default:
14359 info->callbacks->einfo
14360 /* xgettext:c-format */
14361 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14362 input_bfd, (int) r_type, sym_name);
14363
14364 bfd_set_error (bfd_error_bad_value);
14365 ret = FALSE;
14366 goto copy_reloc;
14367
14368 case R_PPC64_NONE:
14369 case R_PPC64_TLS:
14370 case R_PPC64_TLSGD:
14371 case R_PPC64_TLSLD:
14372 case R_PPC64_TOCSAVE:
14373 case R_PPC64_GNU_VTINHERIT:
14374 case R_PPC64_GNU_VTENTRY:
14375 case R_PPC64_ENTRY:
14376 goto copy_reloc;
14377
14378 /* GOT16 relocations. Like an ADDR16 using the symbol's
14379 address in the GOT as relocation value instead of the
14380 symbol's value itself. Also, create a GOT entry for the
14381 symbol and put the symbol value there. */
14382 case R_PPC64_GOT_TLSGD16:
14383 case R_PPC64_GOT_TLSGD16_LO:
14384 case R_PPC64_GOT_TLSGD16_HI:
14385 case R_PPC64_GOT_TLSGD16_HA:
14386 tls_type = TLS_TLS | TLS_GD;
14387 goto dogot;
14388
14389 case R_PPC64_GOT_TLSLD16:
14390 case R_PPC64_GOT_TLSLD16_LO:
14391 case R_PPC64_GOT_TLSLD16_HI:
14392 case R_PPC64_GOT_TLSLD16_HA:
14393 tls_type = TLS_TLS | TLS_LD;
14394 goto dogot;
14395
14396 case R_PPC64_GOT_TPREL16_DS:
14397 case R_PPC64_GOT_TPREL16_LO_DS:
14398 case R_PPC64_GOT_TPREL16_HI:
14399 case R_PPC64_GOT_TPREL16_HA:
14400 tls_type = TLS_TLS | TLS_TPREL;
14401 goto dogot;
14402
14403 case R_PPC64_GOT_DTPREL16_DS:
14404 case R_PPC64_GOT_DTPREL16_LO_DS:
14405 case R_PPC64_GOT_DTPREL16_HI:
14406 case R_PPC64_GOT_DTPREL16_HA:
14407 tls_type = TLS_TLS | TLS_DTPREL;
14408 goto dogot;
14409
14410 case R_PPC64_GOT16:
14411 case R_PPC64_GOT16_LO:
14412 case R_PPC64_GOT16_HI:
14413 case R_PPC64_GOT16_HA:
14414 case R_PPC64_GOT16_DS:
14415 case R_PPC64_GOT16_LO_DS:
14416 dogot:
14417 {
14418 /* Relocation is to the entry for this symbol in the global
14419 offset table. */
14420 asection *got;
14421 bfd_vma *offp;
14422 bfd_vma off;
14423 unsigned long indx = 0;
14424 struct got_entry *ent;
14425
14426 if (tls_type == (TLS_TLS | TLS_LD)
14427 && (h == NULL
14428 || !h->elf.def_dynamic))
14429 ent = ppc64_tlsld_got (input_bfd);
14430 else
14431 {
14432 if (h != NULL)
14433 {
14434 if (!htab->elf.dynamic_sections_created
14435 || h->elf.dynindx == -1
14436 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14437 || (ELF_ST_VISIBILITY (h->elf.other) != STV_DEFAULT
14438 && h->elf.root.type == bfd_link_hash_undefweak))
14439 /* This is actually a static link, or it is a
14440 -Bsymbolic link and the symbol is defined
14441 locally, or the symbol was forced to be local
14442 because of a version file. */
14443 ;
14444 else
14445 {
14446 indx = h->elf.dynindx;
14447 unresolved_reloc = FALSE;
14448 }
14449 ent = h->elf.got.glist;
14450 }
14451 else
14452 {
14453 if (local_got_ents == NULL)
14454 abort ();
14455 ent = local_got_ents[r_symndx];
14456 }
14457
14458 for (; ent != NULL; ent = ent->next)
14459 if (ent->addend == orig_rel.r_addend
14460 && ent->owner == input_bfd
14461 && ent->tls_type == tls_type)
14462 break;
14463 }
14464
14465 if (ent == NULL)
14466 abort ();
14467 if (ent->is_indirect)
14468 ent = ent->got.ent;
14469 offp = &ent->got.offset;
14470 got = ppc64_elf_tdata (ent->owner)->got;
14471 if (got == NULL)
14472 abort ();
14473
14474 /* The offset must always be a multiple of 8. We use the
14475 least significant bit to record whether we have already
14476 processed this entry. */
14477 off = *offp;
14478 if ((off & 1) != 0)
14479 off &= ~1;
14480 else
14481 {
14482 /* Generate relocs for the dynamic linker, except in
14483 the case of TLSLD where we'll use one entry per
14484 module. */
14485 asection *relgot;
14486 bfd_boolean ifunc;
14487
14488 *offp = off | 1;
14489 relgot = NULL;
14490 ifunc = (h != NULL
14491 ? h->elf.type == STT_GNU_IFUNC
14492 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14493 if (ifunc)
14494 {
14495 relgot = htab->elf.irelplt;
14496 if (indx == 0)
14497 htab->local_ifunc_resolver = 1;
14498 else if (is_static_defined (&h->elf))
14499 htab->maybe_local_ifunc_resolver = 1;
14500 }
14501 else if (indx != 0
14502 || (bfd_link_pic (info)
14503 && (h == NULL
14504 || (ELF_ST_VISIBILITY (h->elf.other)
14505 == STV_DEFAULT)
14506 || h->elf.root.type != bfd_link_hash_undefweak
14507 || (tls_type == (TLS_TLS | TLS_LD)
14508 && !h->elf.def_dynamic))))
14509 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14510 if (relgot != NULL)
14511 {
14512 outrel.r_offset = (got->output_section->vma
14513 + got->output_offset
14514 + off);
14515 outrel.r_addend = addend;
14516 if (tls_type & (TLS_LD | TLS_GD))
14517 {
14518 outrel.r_addend = 0;
14519 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14520 if (tls_type == (TLS_TLS | TLS_GD))
14521 {
14522 loc = relgot->contents;
14523 loc += (relgot->reloc_count++
14524 * sizeof (Elf64_External_Rela));
14525 bfd_elf64_swap_reloca_out (output_bfd,
14526 &outrel, loc);
14527 outrel.r_offset += 8;
14528 outrel.r_addend = addend;
14529 outrel.r_info
14530 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14531 }
14532 }
14533 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14534 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14535 else if (tls_type == (TLS_TLS | TLS_TPREL))
14536 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14537 else if (indx != 0)
14538 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14539 else
14540 {
14541 if (ifunc)
14542 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14543 else
14544 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14545
14546 /* Write the .got section contents for the sake
14547 of prelink. */
14548 loc = got->contents + off;
14549 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14550 loc);
14551 }
14552
14553 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14554 {
14555 outrel.r_addend += relocation;
14556 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14557 {
14558 if (htab->elf.tls_sec == NULL)
14559 outrel.r_addend = 0;
14560 else
14561 outrel.r_addend -= htab->elf.tls_sec->vma;
14562 }
14563 }
14564 loc = relgot->contents;
14565 loc += (relgot->reloc_count++
14566 * sizeof (Elf64_External_Rela));
14567 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14568 }
14569
14570 /* Init the .got section contents here if we're not
14571 emitting a reloc. */
14572 else
14573 {
14574 int tlsopt
14575 = (htab->params->tls_get_addr_opt
14576 && htab->tls_get_addr_fd != NULL
14577 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
14578
14579 relocation += addend;
14580 if (tls_type != 0)
14581 {
14582 if (htab->elf.tls_sec == NULL)
14583 relocation = 0;
14584 else
14585 {
14586 if (tls_type & TLS_LD)
14587 relocation = 0;
14588 else
14589 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14590 if ((tls_type & TLS_TPREL)
14591 || (tlsopt && !(tls_type & TLS_DTPREL)))
14592 relocation += DTP_OFFSET - TP_OFFSET;
14593 }
14594
14595 if (tls_type & (TLS_GD | TLS_LD))
14596 {
14597 bfd_put_64 (output_bfd, relocation,
14598 got->contents + off + 8);
14599 relocation = !tlsopt;
14600 }
14601 }
14602 bfd_put_64 (output_bfd, relocation,
14603 got->contents + off);
14604 }
14605 }
14606
14607 if (off >= (bfd_vma) -2)
14608 abort ();
14609
14610 relocation = got->output_section->vma + got->output_offset + off;
14611 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14612 }
14613 break;
14614
14615 case R_PPC64_PLT16_HA:
14616 case R_PPC64_PLT16_HI:
14617 case R_PPC64_PLT16_LO:
14618 case R_PPC64_PLT32:
14619 case R_PPC64_PLT64:
14620 /* Relocation is to the entry for this symbol in the
14621 procedure linkage table. */
14622 {
14623 struct plt_entry **plt_list = NULL;
14624 if (h != NULL)
14625 plt_list = &h->elf.plt.plist;
14626 else if (local_got_ents != NULL)
14627 {
14628 struct plt_entry **local_plt = (struct plt_entry **)
14629 (local_got_ents + symtab_hdr->sh_info);
14630 unsigned char *local_got_tls_masks = (unsigned char *)
14631 (local_plt + symtab_hdr->sh_info);
14632 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14633 plt_list = local_plt + r_symndx;
14634 }
14635 if (plt_list)
14636 {
14637 struct plt_entry *ent;
14638
14639 for (ent = *plt_list; ent != NULL; ent = ent->next)
14640 if (ent->plt.offset != (bfd_vma) -1
14641 && ent->addend == orig_rel.r_addend)
14642 {
14643 asection *plt;
14644
14645 plt = htab->elf.splt;
14646 if (!htab->elf.dynamic_sections_created
14647 || h == NULL
14648 || h->elf.dynindx == -1)
14649 plt = htab->elf.iplt;
14650 relocation = (plt->output_section->vma
14651 + plt->output_offset
14652 + ent->plt.offset);
14653 addend = 0;
14654 unresolved_reloc = FALSE;
14655 break;
14656 }
14657 }
14658 }
14659 break;
14660
14661 case R_PPC64_TOC:
14662 /* Relocation value is TOC base. */
14663 relocation = TOCstart;
14664 if (r_symndx == STN_UNDEF)
14665 relocation += htab->sec_info[input_section->id].toc_off;
14666 else if (unresolved_reloc)
14667 ;
14668 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14669 relocation += htab->sec_info[sec->id].toc_off;
14670 else
14671 unresolved_reloc = TRUE;
14672 goto dodyn;
14673
14674 /* TOC16 relocs. We want the offset relative to the TOC base,
14675 which is the address of the start of the TOC plus 0x8000.
14676 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14677 in this order. */
14678 case R_PPC64_TOC16:
14679 case R_PPC64_TOC16_LO:
14680 case R_PPC64_TOC16_HI:
14681 case R_PPC64_TOC16_DS:
14682 case R_PPC64_TOC16_LO_DS:
14683 case R_PPC64_TOC16_HA:
14684 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14685 break;
14686
14687 /* Relocate against the beginning of the section. */
14688 case R_PPC64_SECTOFF:
14689 case R_PPC64_SECTOFF_LO:
14690 case R_PPC64_SECTOFF_HI:
14691 case R_PPC64_SECTOFF_DS:
14692 case R_PPC64_SECTOFF_LO_DS:
14693 case R_PPC64_SECTOFF_HA:
14694 if (sec != NULL)
14695 addend -= sec->output_section->vma;
14696 break;
14697
14698 case R_PPC64_REL16:
14699 case R_PPC64_REL16_LO:
14700 case R_PPC64_REL16_HI:
14701 case R_PPC64_REL16_HA:
14702 case R_PPC64_REL16DX_HA:
14703 break;
14704
14705 case R_PPC64_REL14:
14706 case R_PPC64_REL14_BRNTAKEN:
14707 case R_PPC64_REL14_BRTAKEN:
14708 case R_PPC64_REL24:
14709 break;
14710
14711 case R_PPC64_TPREL16:
14712 case R_PPC64_TPREL16_LO:
14713 case R_PPC64_TPREL16_HI:
14714 case R_PPC64_TPREL16_HA:
14715 case R_PPC64_TPREL16_DS:
14716 case R_PPC64_TPREL16_LO_DS:
14717 case R_PPC64_TPREL16_HIGH:
14718 case R_PPC64_TPREL16_HIGHA:
14719 case R_PPC64_TPREL16_HIGHER:
14720 case R_PPC64_TPREL16_HIGHERA:
14721 case R_PPC64_TPREL16_HIGHEST:
14722 case R_PPC64_TPREL16_HIGHESTA:
14723 if (h != NULL
14724 && h->elf.root.type == bfd_link_hash_undefweak
14725 && h->elf.dynindx == -1)
14726 {
14727 /* Make this relocation against an undefined weak symbol
14728 resolve to zero. This is really just a tweak, since
14729 code using weak externs ought to check that they are
14730 defined before using them. */
14731 bfd_byte *p = contents + rel->r_offset - d_offset;
14732
14733 insn = bfd_get_32 (input_bfd, p);
14734 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14735 if (insn != 0)
14736 bfd_put_32 (input_bfd, insn, p);
14737 break;
14738 }
14739 if (htab->elf.tls_sec != NULL)
14740 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14741 if (bfd_link_pic (info))
14742 /* The TPREL16 relocs shouldn't really be used in shared
14743 libs as they will result in DT_TEXTREL being set, but
14744 support them anyway. */
14745 goto dodyn;
14746 break;
14747
14748 case R_PPC64_DTPREL16:
14749 case R_PPC64_DTPREL16_LO:
14750 case R_PPC64_DTPREL16_HI:
14751 case R_PPC64_DTPREL16_HA:
14752 case R_PPC64_DTPREL16_DS:
14753 case R_PPC64_DTPREL16_LO_DS:
14754 case R_PPC64_DTPREL16_HIGH:
14755 case R_PPC64_DTPREL16_HIGHA:
14756 case R_PPC64_DTPREL16_HIGHER:
14757 case R_PPC64_DTPREL16_HIGHERA:
14758 case R_PPC64_DTPREL16_HIGHEST:
14759 case R_PPC64_DTPREL16_HIGHESTA:
14760 if (htab->elf.tls_sec != NULL)
14761 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14762 break;
14763
14764 case R_PPC64_ADDR64_LOCAL:
14765 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14766 ? h->elf.other
14767 : sym->st_other);
14768 break;
14769
14770 case R_PPC64_DTPMOD64:
14771 relocation = 1;
14772 addend = 0;
14773 goto dodyn;
14774
14775 case R_PPC64_TPREL64:
14776 if (htab->elf.tls_sec != NULL)
14777 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14778 goto dodyn;
14779
14780 case R_PPC64_DTPREL64:
14781 if (htab->elf.tls_sec != NULL)
14782 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14783 /* Fall through. */
14784
14785 /* Relocations that may need to be propagated if this is a
14786 dynamic object. */
14787 case R_PPC64_REL30:
14788 case R_PPC64_REL32:
14789 case R_PPC64_REL64:
14790 case R_PPC64_ADDR14:
14791 case R_PPC64_ADDR14_BRNTAKEN:
14792 case R_PPC64_ADDR14_BRTAKEN:
14793 case R_PPC64_ADDR16:
14794 case R_PPC64_ADDR16_DS:
14795 case R_PPC64_ADDR16_HA:
14796 case R_PPC64_ADDR16_HI:
14797 case R_PPC64_ADDR16_HIGH:
14798 case R_PPC64_ADDR16_HIGHA:
14799 case R_PPC64_ADDR16_HIGHER:
14800 case R_PPC64_ADDR16_HIGHERA:
14801 case R_PPC64_ADDR16_HIGHEST:
14802 case R_PPC64_ADDR16_HIGHESTA:
14803 case R_PPC64_ADDR16_LO:
14804 case R_PPC64_ADDR16_LO_DS:
14805 case R_PPC64_ADDR24:
14806 case R_PPC64_ADDR32:
14807 case R_PPC64_ADDR64:
14808 case R_PPC64_UADDR16:
14809 case R_PPC64_UADDR32:
14810 case R_PPC64_UADDR64:
14811 dodyn:
14812 if ((input_section->flags & SEC_ALLOC) == 0)
14813 break;
14814
14815 if (NO_OPD_RELOCS && is_opd)
14816 break;
14817
14818 if (bfd_link_pic (info)
14819 ? ((h == NULL
14820 || h->dyn_relocs != NULL)
14821 && ((h != NULL && pc_dynrelocs (h))
14822 || must_be_dyn_reloc (info, r_type)))
14823 : (h != NULL
14824 ? h->dyn_relocs != NULL
14825 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14826 {
14827 bfd_boolean skip, relocate;
14828 asection *sreloc;
14829 bfd_vma out_off;
14830 long indx = 0;
14831
14832 /* When generating a dynamic object, these relocations
14833 are copied into the output file to be resolved at run
14834 time. */
14835
14836 skip = FALSE;
14837 relocate = FALSE;
14838
14839 out_off = _bfd_elf_section_offset (output_bfd, info,
14840 input_section, rel->r_offset);
14841 if (out_off == (bfd_vma) -1)
14842 skip = TRUE;
14843 else if (out_off == (bfd_vma) -2)
14844 skip = TRUE, relocate = TRUE;
14845 out_off += (input_section->output_section->vma
14846 + input_section->output_offset);
14847 outrel.r_offset = out_off;
14848 outrel.r_addend = rel->r_addend;
14849
14850 /* Optimize unaligned reloc use. */
14851 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14852 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14853 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14854 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14855 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14856 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14857 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14858 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14859 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14860
14861 if (skip)
14862 memset (&outrel, 0, sizeof outrel);
14863 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14864 && !is_opd
14865 && r_type != R_PPC64_TOC)
14866 {
14867 indx = h->elf.dynindx;
14868 BFD_ASSERT (indx != -1);
14869 outrel.r_info = ELF64_R_INFO (indx, r_type);
14870 }
14871 else
14872 {
14873 /* This symbol is local, or marked to become local,
14874 or this is an opd section reloc which must point
14875 at a local function. */
14876 outrel.r_addend += relocation;
14877 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14878 {
14879 if (is_opd && h != NULL)
14880 {
14881 /* Lie about opd entries. This case occurs
14882 when building shared libraries and we
14883 reference a function in another shared
14884 lib. The same thing happens for a weak
14885 definition in an application that's
14886 overridden by a strong definition in a
14887 shared lib. (I believe this is a generic
14888 bug in binutils handling of weak syms.)
14889 In these cases we won't use the opd
14890 entry in this lib. */
14891 unresolved_reloc = FALSE;
14892 }
14893 if (!is_opd
14894 && r_type == R_PPC64_ADDR64
14895 && (h != NULL
14896 ? h->elf.type == STT_GNU_IFUNC
14897 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14898 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14899 else
14900 {
14901 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14902
14903 /* We need to relocate .opd contents for ld.so.
14904 Prelink also wants simple and consistent rules
14905 for relocs. This make all RELATIVE relocs have
14906 *r_offset equal to r_addend. */
14907 relocate = TRUE;
14908 }
14909 }
14910 else
14911 {
14912 if (h != NULL
14913 ? h->elf.type == STT_GNU_IFUNC
14914 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14915 {
14916 info->callbacks->einfo
14917 /* xgettext:c-format */
14918 (_("%H: %s for indirect "
14919 "function `%T' unsupported\n"),
14920 input_bfd, input_section, rel->r_offset,
14921 ppc64_elf_howto_table[r_type]->name,
14922 sym_name);
14923 ret = FALSE;
14924 }
14925 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14926 ;
14927 else if (sec == NULL || sec->owner == NULL)
14928 {
14929 bfd_set_error (bfd_error_bad_value);
14930 return FALSE;
14931 }
14932 else
14933 {
14934 asection *osec;
14935
14936 osec = sec->output_section;
14937 indx = elf_section_data (osec)->dynindx;
14938
14939 if (indx == 0)
14940 {
14941 if ((osec->flags & SEC_READONLY) == 0
14942 && htab->elf.data_index_section != NULL)
14943 osec = htab->elf.data_index_section;
14944 else
14945 osec = htab->elf.text_index_section;
14946 indx = elf_section_data (osec)->dynindx;
14947 }
14948 BFD_ASSERT (indx != 0);
14949
14950 /* We are turning this relocation into one
14951 against a section symbol, so subtract out
14952 the output section's address but not the
14953 offset of the input section in the output
14954 section. */
14955 outrel.r_addend -= osec->vma;
14956 }
14957
14958 outrel.r_info = ELF64_R_INFO (indx, r_type);
14959 }
14960 }
14961
14962 sreloc = elf_section_data (input_section)->sreloc;
14963 if (h != NULL
14964 ? h->elf.type == STT_GNU_IFUNC
14965 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14966 {
14967 sreloc = htab->elf.irelplt;
14968 if (indx == 0)
14969 htab->local_ifunc_resolver = 1;
14970 else if (is_static_defined (&h->elf))
14971 htab->maybe_local_ifunc_resolver = 1;
14972 }
14973 if (sreloc == NULL)
14974 abort ();
14975
14976 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14977 >= sreloc->size)
14978 abort ();
14979 loc = sreloc->contents;
14980 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14981 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14982
14983 /* If this reloc is against an external symbol, it will
14984 be computed at runtime, so there's no need to do
14985 anything now. However, for the sake of prelink ensure
14986 that the section contents are a known value. */
14987 if (! relocate)
14988 {
14989 unresolved_reloc = FALSE;
14990 /* The value chosen here is quite arbitrary as ld.so
14991 ignores section contents except for the special
14992 case of .opd where the contents might be accessed
14993 before relocation. Choose zero, as that won't
14994 cause reloc overflow. */
14995 relocation = 0;
14996 addend = 0;
14997 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14998 to improve backward compatibility with older
14999 versions of ld. */
15000 if (r_type == R_PPC64_ADDR64)
15001 addend = outrel.r_addend;
15002 /* Adjust pc_relative relocs to have zero in *r_offset. */
15003 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15004 addend = outrel.r_offset;
15005 }
15006 }
15007 else if (r_type == R_PPC64_DTPMOD64
15008 && htab->params->tls_get_addr_opt
15009 && htab->tls_get_addr_fd != NULL
15010 && htab->tls_get_addr_fd->elf.plt.plist != NULL)
15011 {
15012 /* Set up for __tls_get_addr_opt stub, when this entry
15013 does not have dynamic relocs. */
15014 relocation = 0;
15015 /* Set up the next word for local dynamic. If it turns
15016 out to be global dynamic, the reloc will overwrite
15017 this value. */
15018 if (rel->r_offset + 16 <= input_section->size)
15019 bfd_put_64 (input_bfd, DTP_OFFSET - TP_OFFSET,
15020 contents + rel->r_offset + 8);
15021 }
15022 else if (r_type == R_PPC64_DTPREL64
15023 && htab->params->tls_get_addr_opt
15024 && htab->tls_get_addr_fd != NULL
15025 && htab->tls_get_addr_fd->elf.plt.plist != NULL
15026 && rel > relocs
15027 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
15028 && rel[-1].r_offset + 8 == rel->r_offset)
15029 {
15030 /* __tls_get_addr_opt stub value. */
15031 addend += DTP_OFFSET - TP_OFFSET;
15032 }
15033 break;
15034
15035 case R_PPC64_COPY:
15036 case R_PPC64_GLOB_DAT:
15037 case R_PPC64_JMP_SLOT:
15038 case R_PPC64_JMP_IREL:
15039 case R_PPC64_RELATIVE:
15040 /* We shouldn't ever see these dynamic relocs in relocatable
15041 files. */
15042 /* Fall through. */
15043
15044 case R_PPC64_PLTGOT16:
15045 case R_PPC64_PLTGOT16_DS:
15046 case R_PPC64_PLTGOT16_HA:
15047 case R_PPC64_PLTGOT16_HI:
15048 case R_PPC64_PLTGOT16_LO:
15049 case R_PPC64_PLTGOT16_LO_DS:
15050 case R_PPC64_PLTREL32:
15051 case R_PPC64_PLTREL64:
15052 /* These ones haven't been implemented yet. */
15053
15054 info->callbacks->einfo
15055 /* xgettext:c-format */
15056 (_("%P: %B: %s is not supported for `%T'\n"),
15057 input_bfd,
15058 ppc64_elf_howto_table[r_type]->name, sym_name);
15059
15060 bfd_set_error (bfd_error_invalid_operation);
15061 ret = FALSE;
15062 goto copy_reloc;
15063 }
15064
15065 /* Multi-instruction sequences that access the TOC can be
15066 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15067 to nop; addi rb,r2,x; */
15068 switch (r_type)
15069 {
15070 default:
15071 break;
15072
15073 case R_PPC64_GOT_TLSLD16_HI:
15074 case R_PPC64_GOT_TLSGD16_HI:
15075 case R_PPC64_GOT_TPREL16_HI:
15076 case R_PPC64_GOT_DTPREL16_HI:
15077 case R_PPC64_GOT16_HI:
15078 case R_PPC64_TOC16_HI:
15079 /* These relocs would only be useful if building up an
15080 offset to later add to r2, perhaps in an indexed
15081 addressing mode instruction. Don't try to optimize.
15082 Unfortunately, the possibility of someone building up an
15083 offset like this or even with the HA relocs, means that
15084 we need to check the high insn when optimizing the low
15085 insn. */
15086 break;
15087
15088 case R_PPC64_GOT_TLSLD16_HA:
15089 case R_PPC64_GOT_TLSGD16_HA:
15090 case R_PPC64_GOT_TPREL16_HA:
15091 case R_PPC64_GOT_DTPREL16_HA:
15092 case R_PPC64_GOT16_HA:
15093 case R_PPC64_TOC16_HA:
15094 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15095 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15096 {
15097 bfd_byte *p = contents + (rel->r_offset & ~3);
15098 bfd_put_32 (input_bfd, NOP, p);
15099 }
15100 break;
15101
15102 case R_PPC64_GOT_TLSLD16_LO:
15103 case R_PPC64_GOT_TLSGD16_LO:
15104 case R_PPC64_GOT_TPREL16_LO_DS:
15105 case R_PPC64_GOT_DTPREL16_LO_DS:
15106 case R_PPC64_GOT16_LO:
15107 case R_PPC64_GOT16_LO_DS:
15108 case R_PPC64_TOC16_LO:
15109 case R_PPC64_TOC16_LO_DS:
15110 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15111 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15112 {
15113 bfd_byte *p = contents + (rel->r_offset & ~3);
15114 insn = bfd_get_32 (input_bfd, p);
15115 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15116 {
15117 /* Transform addic to addi when we change reg. */
15118 insn &= ~((0x3f << 26) | (0x1f << 16));
15119 insn |= (14u << 26) | (2 << 16);
15120 }
15121 else
15122 {
15123 insn &= ~(0x1f << 16);
15124 insn |= 2 << 16;
15125 }
15126 bfd_put_32 (input_bfd, insn, p);
15127 }
15128 break;
15129 }
15130
15131 /* Do any further special processing. */
15132 howto = ppc64_elf_howto_table[(int) r_type];
15133 switch (r_type)
15134 {
15135 default:
15136 break;
15137
15138 case R_PPC64_REL16_HA:
15139 case R_PPC64_REL16DX_HA:
15140 case R_PPC64_ADDR16_HA:
15141 case R_PPC64_ADDR16_HIGHA:
15142 case R_PPC64_ADDR16_HIGHERA:
15143 case R_PPC64_ADDR16_HIGHESTA:
15144 case R_PPC64_TOC16_HA:
15145 case R_PPC64_SECTOFF_HA:
15146 case R_PPC64_TPREL16_HA:
15147 case R_PPC64_TPREL16_HIGHA:
15148 case R_PPC64_TPREL16_HIGHERA:
15149 case R_PPC64_TPREL16_HIGHESTA:
15150 case R_PPC64_DTPREL16_HA:
15151 case R_PPC64_DTPREL16_HIGHA:
15152 case R_PPC64_DTPREL16_HIGHERA:
15153 case R_PPC64_DTPREL16_HIGHESTA:
15154 /* It's just possible that this symbol is a weak symbol
15155 that's not actually defined anywhere. In that case,
15156 'sec' would be NULL, and we should leave the symbol
15157 alone (it will be set to zero elsewhere in the link). */
15158 if (sec == NULL)
15159 break;
15160 /* Fall through. */
15161
15162 case R_PPC64_GOT16_HA:
15163 case R_PPC64_PLTGOT16_HA:
15164 case R_PPC64_PLT16_HA:
15165 case R_PPC64_GOT_TLSGD16_HA:
15166 case R_PPC64_GOT_TLSLD16_HA:
15167 case R_PPC64_GOT_TPREL16_HA:
15168 case R_PPC64_GOT_DTPREL16_HA:
15169 /* Add 0x10000 if sign bit in 0:15 is set.
15170 Bits 0:15 are not used. */
15171 addend += 0x8000;
15172 break;
15173
15174 case R_PPC64_ADDR16_DS:
15175 case R_PPC64_ADDR16_LO_DS:
15176 case R_PPC64_GOT16_DS:
15177 case R_PPC64_GOT16_LO_DS:
15178 case R_PPC64_PLT16_LO_DS:
15179 case R_PPC64_SECTOFF_DS:
15180 case R_PPC64_SECTOFF_LO_DS:
15181 case R_PPC64_TOC16_DS:
15182 case R_PPC64_TOC16_LO_DS:
15183 case R_PPC64_PLTGOT16_DS:
15184 case R_PPC64_PLTGOT16_LO_DS:
15185 case R_PPC64_GOT_TPREL16_DS:
15186 case R_PPC64_GOT_TPREL16_LO_DS:
15187 case R_PPC64_GOT_DTPREL16_DS:
15188 case R_PPC64_GOT_DTPREL16_LO_DS:
15189 case R_PPC64_TPREL16_DS:
15190 case R_PPC64_TPREL16_LO_DS:
15191 case R_PPC64_DTPREL16_DS:
15192 case R_PPC64_DTPREL16_LO_DS:
15193 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15194 mask = 3;
15195 /* If this reloc is against an lq, lxv, or stxv insn, then
15196 the value must be a multiple of 16. This is somewhat of
15197 a hack, but the "correct" way to do this by defining _DQ
15198 forms of all the _DS relocs bloats all reloc switches in
15199 this file. It doesn't make much sense to use these
15200 relocs in data, so testing the insn should be safe. */
15201 if ((insn & (0x3f << 26)) == (56u << 26)
15202 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15203 mask = 15;
15204 relocation += addend;
15205 addend = insn & (mask ^ 3);
15206 if ((relocation & mask) != 0)
15207 {
15208 relocation ^= relocation & mask;
15209 info->callbacks->einfo
15210 /* xgettext:c-format */
15211 (_("%H: error: %s not a multiple of %u\n"),
15212 input_bfd, input_section, rel->r_offset,
15213 howto->name,
15214 mask + 1);
15215 bfd_set_error (bfd_error_bad_value);
15216 ret = FALSE;
15217 goto copy_reloc;
15218 }
15219 break;
15220 }
15221
15222 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15223 because such sections are not SEC_ALLOC and thus ld.so will
15224 not process them. */
15225 if (unresolved_reloc
15226 && !((input_section->flags & SEC_DEBUGGING) != 0
15227 && h->elf.def_dynamic)
15228 && _bfd_elf_section_offset (output_bfd, info, input_section,
15229 rel->r_offset) != (bfd_vma) -1)
15230 {
15231 info->callbacks->einfo
15232 /* xgettext:c-format */
15233 (_("%H: unresolvable %s against `%T'\n"),
15234 input_bfd, input_section, rel->r_offset,
15235 howto->name,
15236 h->elf.root.root.string);
15237 ret = FALSE;
15238 }
15239
15240 /* 16-bit fields in insns mostly have signed values, but a
15241 few insns have 16-bit unsigned values. Really, we should
15242 have different reloc types. */
15243 if (howto->complain_on_overflow != complain_overflow_dont
15244 && howto->dst_mask == 0xffff
15245 && (input_section->flags & SEC_CODE) != 0)
15246 {
15247 enum complain_overflow complain = complain_overflow_signed;
15248
15249 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15250 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15251 complain = complain_overflow_bitfield;
15252 else if (howto->rightshift == 0
15253 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15254 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15255 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15256 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15257 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15258 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15259 complain = complain_overflow_unsigned;
15260 if (howto->complain_on_overflow != complain)
15261 {
15262 alt_howto = *howto;
15263 alt_howto.complain_on_overflow = complain;
15264 howto = &alt_howto;
15265 }
15266 }
15267
15268 if (r_type == R_PPC64_REL16DX_HA)
15269 {
15270 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15271 if (rel->r_offset + 4 > input_section->size)
15272 r = bfd_reloc_outofrange;
15273 else
15274 {
15275 relocation += addend;
15276 relocation -= (rel->r_offset
15277 + input_section->output_offset
15278 + input_section->output_section->vma);
15279 relocation = (bfd_signed_vma) relocation >> 16;
15280 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15281 insn &= ~0x1fffc1;
15282 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15283 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15284 r = bfd_reloc_ok;
15285 if (relocation + 0x8000 > 0xffff)
15286 r = bfd_reloc_overflow;
15287 }
15288 }
15289 else
15290 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15291 rel->r_offset, relocation, addend);
15292
15293 if (r != bfd_reloc_ok)
15294 {
15295 char *more_info = NULL;
15296 const char *reloc_name = howto->name;
15297
15298 if (reloc_dest != DEST_NORMAL)
15299 {
15300 more_info = bfd_malloc (strlen (reloc_name) + 8);
15301 if (more_info != NULL)
15302 {
15303 strcpy (more_info, reloc_name);
15304 strcat (more_info, (reloc_dest == DEST_OPD
15305 ? " (OPD)" : " (stub)"));
15306 reloc_name = more_info;
15307 }
15308 }
15309
15310 if (r == bfd_reloc_overflow)
15311 {
15312 /* On code like "if (foo) foo();" don't report overflow
15313 on a branch to zero when foo is undefined. */
15314 if (!warned
15315 && (reloc_dest == DEST_STUB
15316 || !(h != NULL
15317 && (h->elf.root.type == bfd_link_hash_undefweak
15318 || h->elf.root.type == bfd_link_hash_undefined)
15319 && is_branch_reloc (r_type))))
15320 info->callbacks->reloc_overflow (info, &h->elf.root,
15321 sym_name, reloc_name,
15322 orig_rel.r_addend,
15323 input_bfd, input_section,
15324 rel->r_offset);
15325 }
15326 else
15327 {
15328 info->callbacks->einfo
15329 /* xgettext:c-format */
15330 (_("%H: %s against `%T': error %d\n"),
15331 input_bfd, input_section, rel->r_offset,
15332 reloc_name, sym_name, (int) r);
15333 ret = FALSE;
15334 }
15335 if (more_info != NULL)
15336 free (more_info);
15337 }
15338 copy_reloc:
15339 if (wrel != rel)
15340 *wrel = *rel;
15341 }
15342
15343 if (wrel != rel)
15344 {
15345 Elf_Internal_Shdr *rel_hdr;
15346 size_t deleted = rel - wrel;
15347
15348 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15349 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15350 if (rel_hdr->sh_size == 0)
15351 {
15352 /* It is too late to remove an empty reloc section. Leave
15353 one NONE reloc.
15354 ??? What is wrong with an empty section??? */
15355 rel_hdr->sh_size = rel_hdr->sh_entsize;
15356 deleted -= 1;
15357 }
15358 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15359 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15360 input_section->reloc_count -= deleted;
15361 }
15362
15363 /* If we're emitting relocations, then shortly after this function
15364 returns, reloc offsets and addends for this section will be
15365 adjusted. Worse, reloc symbol indices will be for the output
15366 file rather than the input. Save a copy of the relocs for
15367 opd_entry_value. */
15368 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15369 {
15370 bfd_size_type amt;
15371 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15372 rel = bfd_alloc (input_bfd, amt);
15373 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15374 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15375 if (rel == NULL)
15376 return FALSE;
15377 memcpy (rel, relocs, amt);
15378 }
15379 return ret;
15380 }
15381
15382 /* Adjust the value of any local symbols in opd sections. */
15383
15384 static int
15385 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15386 const char *name ATTRIBUTE_UNUSED,
15387 Elf_Internal_Sym *elfsym,
15388 asection *input_sec,
15389 struct elf_link_hash_entry *h)
15390 {
15391 struct _opd_sec_data *opd;
15392 long adjust;
15393 bfd_vma value;
15394
15395 if (h != NULL)
15396 return 1;
15397
15398 opd = get_opd_info (input_sec);
15399 if (opd == NULL || opd->adjust == NULL)
15400 return 1;
15401
15402 value = elfsym->st_value - input_sec->output_offset;
15403 if (!bfd_link_relocatable (info))
15404 value -= input_sec->output_section->vma;
15405
15406 adjust = opd->adjust[OPD_NDX (value)];
15407 if (adjust == -1)
15408 return 2;
15409
15410 elfsym->st_value += adjust;
15411 return 1;
15412 }
15413
15414 /* Finish up dynamic symbol handling. We set the contents of various
15415 dynamic sections here. */
15416
15417 static bfd_boolean
15418 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15419 struct bfd_link_info *info,
15420 struct elf_link_hash_entry *h,
15421 Elf_Internal_Sym *sym)
15422 {
15423 struct ppc_link_hash_table *htab;
15424 struct plt_entry *ent;
15425 Elf_Internal_Rela rela;
15426 bfd_byte *loc;
15427
15428 htab = ppc_hash_table (info);
15429 if (htab == NULL)
15430 return FALSE;
15431
15432 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15433 if (ent->plt.offset != (bfd_vma) -1)
15434 {
15435 /* This symbol has an entry in the procedure linkage
15436 table. Set it up. */
15437 if (!htab->elf.dynamic_sections_created
15438 || h->dynindx == -1)
15439 {
15440 BFD_ASSERT (h->type == STT_GNU_IFUNC
15441 && h->def_regular
15442 && (h->root.type == bfd_link_hash_defined
15443 || h->root.type == bfd_link_hash_defweak));
15444 rela.r_offset = (htab->elf.iplt->output_section->vma
15445 + htab->elf.iplt->output_offset
15446 + ent->plt.offset);
15447 if (htab->opd_abi)
15448 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15449 else
15450 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15451 rela.r_addend = (h->root.u.def.value
15452 + h->root.u.def.section->output_offset
15453 + h->root.u.def.section->output_section->vma
15454 + ent->addend);
15455 loc = (htab->elf.irelplt->contents
15456 + (htab->elf.irelplt->reloc_count++
15457 * sizeof (Elf64_External_Rela)));
15458 htab->local_ifunc_resolver = 1;
15459 }
15460 else
15461 {
15462 rela.r_offset = (htab->elf.splt->output_section->vma
15463 + htab->elf.splt->output_offset
15464 + ent->plt.offset);
15465 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15466 rela.r_addend = ent->addend;
15467 loc = (htab->elf.srelplt->contents
15468 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15469 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15470 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15471 htab->maybe_local_ifunc_resolver = 1;
15472 }
15473 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15474
15475 if (!htab->opd_abi)
15476 {
15477 if (!h->def_regular)
15478 {
15479 /* Mark the symbol as undefined, rather than as
15480 defined in glink. Leave the value if there were
15481 any relocations where pointer equality matters
15482 (this is a clue for the dynamic linker, to make
15483 function pointer comparisons work between an
15484 application and shared library), otherwise set it
15485 to zero. */
15486 sym->st_shndx = SHN_UNDEF;
15487 if (!h->pointer_equality_needed)
15488 sym->st_value = 0;
15489 else if (!h->ref_regular_nonweak)
15490 {
15491 /* This breaks function pointer comparisons, but
15492 that is better than breaking tests for a NULL
15493 function pointer. */
15494 sym->st_value = 0;
15495 }
15496 }
15497 }
15498 }
15499
15500 if (h->needs_copy)
15501 {
15502 /* This symbol needs a copy reloc. Set it up. */
15503 asection *srel;
15504
15505 if (h->dynindx == -1
15506 || (h->root.type != bfd_link_hash_defined
15507 && h->root.type != bfd_link_hash_defweak)
15508 || htab->elf.srelbss == NULL
15509 || htab->elf.sreldynrelro == NULL)
15510 abort ();
15511
15512 rela.r_offset = (h->root.u.def.value
15513 + h->root.u.def.section->output_section->vma
15514 + h->root.u.def.section->output_offset);
15515 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15516 rela.r_addend = 0;
15517 if (h->root.u.def.section == htab->elf.sdynrelro)
15518 srel = htab->elf.sreldynrelro;
15519 else
15520 srel = htab->elf.srelbss;
15521 loc = srel->contents;
15522 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15523 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15524 }
15525
15526 return TRUE;
15527 }
15528
15529 /* Used to decide how to sort relocs in an optimal manner for the
15530 dynamic linker, before writing them out. */
15531
15532 static enum elf_reloc_type_class
15533 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15534 const asection *rel_sec,
15535 const Elf_Internal_Rela *rela)
15536 {
15537 enum elf_ppc64_reloc_type r_type;
15538 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15539
15540 if (rel_sec == htab->elf.irelplt)
15541 return reloc_class_ifunc;
15542
15543 r_type = ELF64_R_TYPE (rela->r_info);
15544 switch (r_type)
15545 {
15546 case R_PPC64_RELATIVE:
15547 return reloc_class_relative;
15548 case R_PPC64_JMP_SLOT:
15549 return reloc_class_plt;
15550 case R_PPC64_COPY:
15551 return reloc_class_copy;
15552 default:
15553 return reloc_class_normal;
15554 }
15555 }
15556
15557 /* Finish up the dynamic sections. */
15558
15559 static bfd_boolean
15560 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15561 struct bfd_link_info *info)
15562 {
15563 struct ppc_link_hash_table *htab;
15564 bfd *dynobj;
15565 asection *sdyn;
15566
15567 htab = ppc_hash_table (info);
15568 if (htab == NULL)
15569 return FALSE;
15570
15571 dynobj = htab->elf.dynobj;
15572 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15573
15574 if (htab->elf.dynamic_sections_created)
15575 {
15576 Elf64_External_Dyn *dyncon, *dynconend;
15577
15578 if (sdyn == NULL || htab->elf.sgot == NULL)
15579 abort ();
15580
15581 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15582 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15583 for (; dyncon < dynconend; dyncon++)
15584 {
15585 Elf_Internal_Dyn dyn;
15586 asection *s;
15587
15588 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15589
15590 switch (dyn.d_tag)
15591 {
15592 default:
15593 continue;
15594
15595 case DT_PPC64_GLINK:
15596 s = htab->glink;
15597 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15598 /* We stupidly defined DT_PPC64_GLINK to be the start
15599 of glink rather than the first entry point, which is
15600 what ld.so needs, and now have a bigger stub to
15601 support automatic multiple TOCs. */
15602 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15603 break;
15604
15605 case DT_PPC64_OPD:
15606 s = bfd_get_section_by_name (output_bfd, ".opd");
15607 if (s == NULL)
15608 continue;
15609 dyn.d_un.d_ptr = s->vma;
15610 break;
15611
15612 case DT_PPC64_OPT:
15613 if (htab->do_multi_toc && htab->multi_toc_needed)
15614 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15615 break;
15616
15617 case DT_PPC64_OPDSZ:
15618 s = bfd_get_section_by_name (output_bfd, ".opd");
15619 if (s == NULL)
15620 continue;
15621 dyn.d_un.d_val = s->size;
15622 break;
15623
15624 case DT_PLTGOT:
15625 s = htab->elf.splt;
15626 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15627 break;
15628
15629 case DT_JMPREL:
15630 s = htab->elf.srelplt;
15631 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15632 break;
15633
15634 case DT_PLTRELSZ:
15635 dyn.d_un.d_val = htab->elf.srelplt->size;
15636 break;
15637
15638 case DT_TEXTREL:
15639 if (htab->local_ifunc_resolver)
15640 info->callbacks->einfo
15641 (_("%X%P: text relocations and GNU indirect "
15642 "functions will result in a segfault at runtime\n"));
15643 else if (htab->maybe_local_ifunc_resolver)
15644 info->callbacks->einfo
15645 (_("%P: warning: text relocations and GNU indirect "
15646 "functions may result in a segfault at runtime\n"));
15647 continue;
15648 }
15649
15650 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15651 }
15652 }
15653
15654 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15655 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15656 {
15657 /* Fill in the first entry in the global offset table.
15658 We use it to hold the link-time TOCbase. */
15659 bfd_put_64 (output_bfd,
15660 elf_gp (output_bfd) + TOC_BASE_OFF,
15661 htab->elf.sgot->contents);
15662
15663 /* Set .got entry size. */
15664 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15665 }
15666
15667 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15668 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15669 {
15670 /* Set .plt entry size. */
15671 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15672 = PLT_ENTRY_SIZE (htab);
15673 }
15674
15675 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15676 brlt ourselves if emitrelocations. */
15677 if (htab->brlt != NULL
15678 && htab->brlt->reloc_count != 0
15679 && !_bfd_elf_link_output_relocs (output_bfd,
15680 htab->brlt,
15681 elf_section_data (htab->brlt)->rela.hdr,
15682 elf_section_data (htab->brlt)->relocs,
15683 NULL))
15684 return FALSE;
15685
15686 if (htab->glink != NULL
15687 && htab->glink->reloc_count != 0
15688 && !_bfd_elf_link_output_relocs (output_bfd,
15689 htab->glink,
15690 elf_section_data (htab->glink)->rela.hdr,
15691 elf_section_data (htab->glink)->relocs,
15692 NULL))
15693 return FALSE;
15694
15695 if (htab->glink_eh_frame != NULL
15696 && htab->glink_eh_frame->size != 0)
15697 {
15698 bfd_vma val;
15699 bfd_byte *p;
15700 asection *stub_sec;
15701 size_t align = 4;
15702
15703 p = htab->glink_eh_frame->contents;
15704 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15705 for (stub_sec = htab->params->stub_bfd->sections;
15706 stub_sec != NULL;
15707 stub_sec = stub_sec->next)
15708 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15709 {
15710 /* FDE length. */
15711 p += 4;
15712 /* CIE pointer. */
15713 p += 4;
15714 /* Offset to stub section. */
15715 val = (stub_sec->output_section->vma
15716 + stub_sec->output_offset);
15717 val -= (htab->glink_eh_frame->output_section->vma
15718 + htab->glink_eh_frame->output_offset
15719 + (p - htab->glink_eh_frame->contents));
15720 if (val + 0x80000000 > 0xffffffff)
15721 {
15722 info->callbacks->einfo
15723 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15724 stub_sec->name);
15725 return FALSE;
15726 }
15727 bfd_put_32 (dynobj, val, p);
15728 p += 4;
15729 /* stub section size. */
15730 p += 4;
15731 /* Augmentation. */
15732 p += 1;
15733 /* Pad. */
15734 p += ((17 + align - 1) & -align) - 17;
15735 }
15736 if (htab->glink != NULL && htab->glink->size != 0)
15737 {
15738 /* FDE length. */
15739 p += 4;
15740 /* CIE pointer. */
15741 p += 4;
15742 /* Offset to .glink. */
15743 val = (htab->glink->output_section->vma
15744 + htab->glink->output_offset
15745 + 8);
15746 val -= (htab->glink_eh_frame->output_section->vma
15747 + htab->glink_eh_frame->output_offset
15748 + (p - htab->glink_eh_frame->contents));
15749 if (val + 0x80000000 > 0xffffffff)
15750 {
15751 info->callbacks->einfo
15752 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15753 htab->glink->name);
15754 return FALSE;
15755 }
15756 bfd_put_32 (dynobj, val, p);
15757 p += 4;
15758 /* .glink size. */
15759 p += 4;
15760 /* Augmentation. */
15761 p += 1;
15762 /* Ops. */
15763 p += 7;
15764 p += ((24 + align - 1) & -align) - 24;
15765 }
15766
15767 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15768 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15769 htab->glink_eh_frame,
15770 htab->glink_eh_frame->contents))
15771 return FALSE;
15772 }
15773
15774 /* We need to handle writing out multiple GOT sections ourselves,
15775 since we didn't add them to DYNOBJ. We know dynobj is the first
15776 bfd. */
15777 while ((dynobj = dynobj->link.next) != NULL)
15778 {
15779 asection *s;
15780
15781 if (!is_ppc64_elf (dynobj))
15782 continue;
15783
15784 s = ppc64_elf_tdata (dynobj)->got;
15785 if (s != NULL
15786 && s->size != 0
15787 && s->output_section != bfd_abs_section_ptr
15788 && !bfd_set_section_contents (output_bfd, s->output_section,
15789 s->contents, s->output_offset,
15790 s->size))
15791 return FALSE;
15792 s = ppc64_elf_tdata (dynobj)->relgot;
15793 if (s != NULL
15794 && s->size != 0
15795 && s->output_section != bfd_abs_section_ptr
15796 && !bfd_set_section_contents (output_bfd, s->output_section,
15797 s->contents, s->output_offset,
15798 s->size))
15799 return FALSE;
15800 }
15801
15802 return TRUE;
15803 }
15804
15805 #include "elf64-target.h"
15806
15807 /* FreeBSD support */
15808
15809 #undef TARGET_LITTLE_SYM
15810 #undef TARGET_LITTLE_NAME
15811
15812 #undef TARGET_BIG_SYM
15813 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15814 #undef TARGET_BIG_NAME
15815 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15816
15817 #undef ELF_OSABI
15818 #define ELF_OSABI ELFOSABI_FREEBSD
15819
15820 #undef elf64_bed
15821 #define elf64_bed elf64_powerpc_fbsd_bed
15822
15823 #include "elf64-target.h"
15824