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PowerPC/BFD: Convert `%P: %H:' to `%H:' in error messages
[deliverable/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 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2049 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2050 16, /* rightshift */
2051 1, /* size (0 = byte, 1 = short, 2 = long) */
2052 16, /* bitsize */
2053 FALSE, /* pc_relative */
2054 0, /* bitpos */
2055 complain_overflow_dont, /* complain_on_overflow */
2056 bfd_elf_generic_reloc, /* special_function */
2057 "R_PPC64_ADDR16_HIGH", /* name */
2058 FALSE, /* partial_inplace */
2059 0, /* src_mask */
2060 0xffff, /* dst_mask */
2061 FALSE), /* pcrel_offset */
2062
2063 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2064 HOWTO (R_PPC64_ADDR16_HIGHA, /* 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 ppc64_elf_ha_reloc, /* special_function */
2072 "R_PPC64_ADDR16_HIGHA", /* name */
2073 FALSE, /* partial_inplace */
2074 0, /* src_mask */
2075 0xffff, /* dst_mask */
2076 FALSE), /* pcrel_offset */
2077
2078 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2079 HOWTO (R_PPC64_DTPREL16_HIGH,
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_unhandled_reloc, /* special_function */
2087 "R_PPC64_DTPREL16_HIGH", /* name */
2088 FALSE, /* partial_inplace */
2089 0, /* src_mask */
2090 0xffff, /* dst_mask */
2091 FALSE), /* pcrel_offset */
2092
2093 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2094 HOWTO (R_PPC64_DTPREL16_HIGHA,
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_HIGHA", /* name */
2103 FALSE, /* partial_inplace */
2104 0, /* src_mask */
2105 0xffff, /* dst_mask */
2106 FALSE), /* pcrel_offset */
2107
2108 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2109 HOWTO (R_PPC64_TPREL16_HIGH,
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_TPREL16_HIGH", /* name */
2118 FALSE, /* partial_inplace */
2119 0, /* src_mask */
2120 0xffff, /* dst_mask */
2121 FALSE), /* pcrel_offset */
2122
2123 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2124 HOWTO (R_PPC64_TPREL16_HIGHA,
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_HIGHA", /* name */
2133 FALSE, /* partial_inplace */
2134 0, /* src_mask */
2135 0xffff, /* dst_mask */
2136 FALSE), /* pcrel_offset */
2137
2138 /* Marker reloc on ELFv2 large-model function entry. */
2139 HOWTO (R_PPC64_ENTRY,
2140 0, /* rightshift */
2141 2, /* size (0 = byte, 1 = short, 2 = long) */
2142 32, /* bitsize */
2143 FALSE, /* pc_relative */
2144 0, /* bitpos */
2145 complain_overflow_dont, /* complain_on_overflow */
2146 bfd_elf_generic_reloc, /* special_function */
2147 "R_PPC64_ENTRY", /* name */
2148 FALSE, /* partial_inplace */
2149 0, /* src_mask */
2150 0, /* dst_mask */
2151 FALSE), /* pcrel_offset */
2152
2153 /* Like ADDR64, but use local entry point of function. */
2154 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2155 0, /* rightshift */
2156 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2157 64, /* 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_ADDR64_LOCAL", /* name */
2163 FALSE, /* partial_inplace */
2164 0, /* src_mask */
2165 ONES (64), /* dst_mask */
2166 FALSE), /* pcrel_offset */
2167
2168 /* GNU extension to record C++ vtable hierarchy. */
2169 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2170 0, /* rightshift */
2171 0, /* size (0 = byte, 1 = short, 2 = long) */
2172 0, /* bitsize */
2173 FALSE, /* pc_relative */
2174 0, /* bitpos */
2175 complain_overflow_dont, /* complain_on_overflow */
2176 NULL, /* special_function */
2177 "R_PPC64_GNU_VTINHERIT", /* name */
2178 FALSE, /* partial_inplace */
2179 0, /* src_mask */
2180 0, /* dst_mask */
2181 FALSE), /* pcrel_offset */
2182
2183 /* GNU extension to record C++ vtable member usage. */
2184 HOWTO (R_PPC64_GNU_VTENTRY, /* 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_VTENTRY", /* name */
2193 FALSE, /* partial_inplace */
2194 0, /* src_mask */
2195 0, /* dst_mask */
2196 FALSE), /* pcrel_offset */
2197 };
2198
2199 \f
2200 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2201 be done. */
2202
2203 static void
2204 ppc_howto_init (void)
2205 {
2206 unsigned int i, type;
2207
2208 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2209 {
2210 type = ppc64_elf_howto_raw[i].type;
2211 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2212 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2213 }
2214 }
2215
2216 static reloc_howto_type *
2217 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2218 bfd_reloc_code_real_type code)
2219 {
2220 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2221
2222 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2223 /* Initialize howto table if needed. */
2224 ppc_howto_init ();
2225
2226 switch (code)
2227 {
2228 default:
2229 return NULL;
2230
2231 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2232 break;
2233 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2234 break;
2235 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2236 break;
2237 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2238 break;
2239 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2240 break;
2241 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2242 break;
2243 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2244 break;
2245 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2246 break;
2247 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2248 break;
2249 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2250 break;
2251 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2252 break;
2253 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2254 break;
2255 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2256 break;
2257 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2258 break;
2259 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2260 break;
2261 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2262 break;
2263 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2264 break;
2265 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2266 break;
2267 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2268 break;
2269 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2270 break;
2271 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2272 break;
2273 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2274 break;
2275 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2276 break;
2277 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2278 break;
2279 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2280 break;
2281 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2286 break;
2287 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2288 break;
2289 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2290 break;
2291 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2292 break;
2293 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2294 break;
2295 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2296 break;
2297 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2298 break;
2299 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2300 break;
2301 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2302 break;
2303 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2304 break;
2305 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2306 break;
2307 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2308 break;
2309 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2310 break;
2311 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2312 break;
2313 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2314 break;
2315 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2316 break;
2317 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2318 break;
2319 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2320 break;
2321 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2322 break;
2323 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2324 break;
2325 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2326 break;
2327 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2328 break;
2329 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2330 break;
2331 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2332 break;
2333 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2334 break;
2335 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2336 break;
2337 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2338 break;
2339 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2340 break;
2341 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2342 break;
2343 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2344 break;
2345 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2346 break;
2347 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2348 break;
2349 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2350 break;
2351 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2352 break;
2353 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2354 break;
2355 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2356 break;
2357 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2358 break;
2359 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2360 break;
2361 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2362 break;
2363 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2364 break;
2365 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2368 break;
2369 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2370 break;
2371 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2372 break;
2373 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2374 break;
2375 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2376 break;
2377 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2378 break;
2379 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2382 break;
2383 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2384 break;
2385 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2386 break;
2387 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2388 break;
2389 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2390 break;
2391 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2392 break;
2393 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2394 break;
2395 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2396 break;
2397 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2398 break;
2399 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2400 break;
2401 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2402 break;
2403 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2414 break;
2415 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2416 break;
2417 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2426 break;
2427 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2428 break;
2429 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2430 break;
2431 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2432 break;
2433 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2436 break;
2437 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2440 break;
2441 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2442 break;
2443 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2444 break;
2445 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2446 break;
2447 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2448 break;
2449 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2450 break;
2451 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2452 break;
2453 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2454 break;
2455 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2456 break;
2457 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2458 break;
2459 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2460 break;
2461 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2462 break;
2463 }
2464
2465 return ppc64_elf_howto_table[r];
2466 };
2467
2468 static reloc_howto_type *
2469 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2470 const char *r_name)
2471 {
2472 unsigned int i;
2473
2474 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2475 if (ppc64_elf_howto_raw[i].name != NULL
2476 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2477 return &ppc64_elf_howto_raw[i];
2478
2479 return NULL;
2480 }
2481
2482 /* Set the howto pointer for a PowerPC ELF reloc. */
2483
2484 static void
2485 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2486 Elf_Internal_Rela *dst)
2487 {
2488 unsigned int type;
2489
2490 /* Initialize howto table if needed. */
2491 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2492 ppc_howto_init ();
2493
2494 type = ELF64_R_TYPE (dst->r_info);
2495 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2496 {
2497 /* xgettext:c-format */
2498 _bfd_error_handler (_("%B: invalid relocation type %d"),
2499 abfd, (int) type);
2500 type = R_PPC64_NONE;
2501 }
2502 cache_ptr->howto = ppc64_elf_howto_table[type];
2503 }
2504
2505 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 enum elf_ppc64_reloc_type r_type;
2513 long insn;
2514 bfd_size_type octets;
2515 bfd_vma value;
2516
2517 /* If this is a relocatable link (output_bfd test tells us), just
2518 call the generic function. Any adjustment will be done at final
2519 link time. */
2520 if (output_bfd != NULL)
2521 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2522 input_section, output_bfd, error_message);
2523
2524 /* Adjust the addend for sign extension of the low 16 bits.
2525 We won't actually be using the low 16 bits, so trashing them
2526 doesn't matter. */
2527 reloc_entry->addend += 0x8000;
2528 r_type = reloc_entry->howto->type;
2529 if (r_type != R_PPC64_REL16DX_HA)
2530 return bfd_reloc_continue;
2531
2532 value = 0;
2533 if (!bfd_is_com_section (symbol->section))
2534 value = symbol->value;
2535 value += (reloc_entry->addend
2536 + symbol->section->output_offset
2537 + symbol->section->output_section->vma);
2538 value -= (reloc_entry->address
2539 + input_section->output_offset
2540 + input_section->output_section->vma);
2541 value = (bfd_signed_vma) value >> 16;
2542
2543 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2544 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2545 insn &= ~0x1fffc1;
2546 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2547 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2548 if (value + 0x8000 > 0xffff)
2549 return bfd_reloc_overflow;
2550 return bfd_reloc_ok;
2551 }
2552
2553 static bfd_reloc_status_type
2554 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2555 void *data, asection *input_section,
2556 bfd *output_bfd, char **error_message)
2557 {
2558 if (output_bfd != NULL)
2559 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2560 input_section, output_bfd, error_message);
2561
2562 if (strcmp (symbol->section->name, ".opd") == 0
2563 && (symbol->section->owner->flags & DYNAMIC) == 0)
2564 {
2565 bfd_vma dest = opd_entry_value (symbol->section,
2566 symbol->value + reloc_entry->addend,
2567 NULL, NULL, FALSE);
2568 if (dest != (bfd_vma) -1)
2569 reloc_entry->addend = dest - (symbol->value
2570 + symbol->section->output_section->vma
2571 + symbol->section->output_offset);
2572 }
2573 else
2574 {
2575 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2576
2577 if (symbol->section->owner != abfd
2578 && symbol->section->owner != NULL
2579 && abiversion (symbol->section->owner) >= 2)
2580 {
2581 unsigned int i;
2582
2583 for (i = 0; i < symbol->section->owner->symcount; ++i)
2584 {
2585 asymbol *symdef = symbol->section->owner->outsymbols[i];
2586
2587 if (strcmp (symdef->name, symbol->name) == 0)
2588 {
2589 elfsym = (elf_symbol_type *) symdef;
2590 break;
2591 }
2592 }
2593 }
2594 reloc_entry->addend
2595 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2596 }
2597 return bfd_reloc_continue;
2598 }
2599
2600 static bfd_reloc_status_type
2601 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2602 void *data, asection *input_section,
2603 bfd *output_bfd, char **error_message)
2604 {
2605 long insn;
2606 enum elf_ppc64_reloc_type r_type;
2607 bfd_size_type octets;
2608 /* Assume 'at' branch hints. */
2609 bfd_boolean is_isa_v2 = TRUE;
2610
2611 /* If this is a relocatable link (output_bfd test tells us), just
2612 call the generic function. Any adjustment will be done at final
2613 link time. */
2614 if (output_bfd != NULL)
2615 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2616 input_section, output_bfd, error_message);
2617
2618 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2619 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2620 insn &= ~(0x01 << 21);
2621 r_type = reloc_entry->howto->type;
2622 if (r_type == R_PPC64_ADDR14_BRTAKEN
2623 || r_type == R_PPC64_REL14_BRTAKEN)
2624 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2625
2626 if (is_isa_v2)
2627 {
2628 /* Set 'a' bit. This is 0b00010 in BO field for branch
2629 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2630 for branch on CTR insns (BO == 1a00t or 1a01t). */
2631 if ((insn & (0x14 << 21)) == (0x04 << 21))
2632 insn |= 0x02 << 21;
2633 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2634 insn |= 0x08 << 21;
2635 else
2636 goto out;
2637 }
2638 else
2639 {
2640 bfd_vma target = 0;
2641 bfd_vma from;
2642
2643 if (!bfd_is_com_section (symbol->section))
2644 target = symbol->value;
2645 target += symbol->section->output_section->vma;
2646 target += symbol->section->output_offset;
2647 target += reloc_entry->addend;
2648
2649 from = (reloc_entry->address
2650 + input_section->output_offset
2651 + input_section->output_section->vma);
2652
2653 /* Invert 'y' bit if not the default. */
2654 if ((bfd_signed_vma) (target - from) < 0)
2655 insn ^= 0x01 << 21;
2656 }
2657 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2658 out:
2659 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2660 input_section, output_bfd, error_message);
2661 }
2662
2663 static bfd_reloc_status_type
2664 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2665 void *data, asection *input_section,
2666 bfd *output_bfd, char **error_message)
2667 {
2668 /* If this is a relocatable link (output_bfd test tells us), just
2669 call the generic function. Any adjustment will be done at final
2670 link time. */
2671 if (output_bfd != NULL)
2672 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2673 input_section, output_bfd, error_message);
2674
2675 /* Subtract the symbol section base address. */
2676 reloc_entry->addend -= symbol->section->output_section->vma;
2677 return bfd_reloc_continue;
2678 }
2679
2680 static bfd_reloc_status_type
2681 ppc64_elf_sectoff_ha_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
2695 /* Adjust the addend for sign extension of the low 16 bits. */
2696 reloc_entry->addend += 0x8000;
2697 return bfd_reloc_continue;
2698 }
2699
2700 static bfd_reloc_status_type
2701 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2702 void *data, asection *input_section,
2703 bfd *output_bfd, char **error_message)
2704 {
2705 bfd_vma TOCstart;
2706
2707 /* If this is a relocatable link (output_bfd test tells us), just
2708 call the generic function. Any adjustment will be done at final
2709 link time. */
2710 if (output_bfd != NULL)
2711 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2712 input_section, output_bfd, error_message);
2713
2714 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2715 if (TOCstart == 0)
2716 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2717
2718 /* Subtract the TOC base address. */
2719 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2720 return bfd_reloc_continue;
2721 }
2722
2723 static bfd_reloc_status_type
2724 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2725 void *data, asection *input_section,
2726 bfd *output_bfd, char **error_message)
2727 {
2728 bfd_vma TOCstart;
2729
2730 /* If this is a relocatable link (output_bfd test tells us), just
2731 call the generic function. Any adjustment will be done at final
2732 link time. */
2733 if (output_bfd != NULL)
2734 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2735 input_section, output_bfd, error_message);
2736
2737 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2738 if (TOCstart == 0)
2739 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2740
2741 /* Subtract the TOC base address. */
2742 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2743
2744 /* Adjust the addend for sign extension of the low 16 bits. */
2745 reloc_entry->addend += 0x8000;
2746 return bfd_reloc_continue;
2747 }
2748
2749 static bfd_reloc_status_type
2750 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2751 void *data, asection *input_section,
2752 bfd *output_bfd, char **error_message)
2753 {
2754 bfd_vma TOCstart;
2755 bfd_size_type octets;
2756
2757 /* If this is a relocatable link (output_bfd test tells us), just
2758 call the generic function. Any adjustment will be done at final
2759 link time. */
2760 if (output_bfd != NULL)
2761 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2762 input_section, output_bfd, error_message);
2763
2764 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2765 if (TOCstart == 0)
2766 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2767
2768 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2769 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2770 return bfd_reloc_ok;
2771 }
2772
2773 static bfd_reloc_status_type
2774 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2775 void *data, asection *input_section,
2776 bfd *output_bfd, char **error_message)
2777 {
2778 /* If this is a relocatable link (output_bfd test tells us), just
2779 call the generic function. Any adjustment will be done at final
2780 link time. */
2781 if (output_bfd != NULL)
2782 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2783 input_section, output_bfd, error_message);
2784
2785 if (error_message != NULL)
2786 {
2787 static char buf[60];
2788 sprintf (buf, "generic linker can't handle %s",
2789 reloc_entry->howto->name);
2790 *error_message = buf;
2791 }
2792 return bfd_reloc_dangerous;
2793 }
2794
2795 /* Track GOT entries needed for a given symbol. We might need more
2796 than one got entry per symbol. */
2797 struct got_entry
2798 {
2799 struct got_entry *next;
2800
2801 /* The symbol addend that we'll be placing in the GOT. */
2802 bfd_vma addend;
2803
2804 /* Unlike other ELF targets, we use separate GOT entries for the same
2805 symbol referenced from different input files. This is to support
2806 automatic multiple TOC/GOT sections, where the TOC base can vary
2807 from one input file to another. After partitioning into TOC groups
2808 we merge entries within the group.
2809
2810 Point to the BFD owning this GOT entry. */
2811 bfd *owner;
2812
2813 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2814 TLS_TPREL or TLS_DTPREL for tls entries. */
2815 unsigned char tls_type;
2816
2817 /* Non-zero if got.ent points to real entry. */
2818 unsigned char is_indirect;
2819
2820 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2821 union
2822 {
2823 bfd_signed_vma refcount;
2824 bfd_vma offset;
2825 struct got_entry *ent;
2826 } got;
2827 };
2828
2829 /* The same for PLT. */
2830 struct plt_entry
2831 {
2832 struct plt_entry *next;
2833
2834 bfd_vma addend;
2835
2836 union
2837 {
2838 bfd_signed_vma refcount;
2839 bfd_vma offset;
2840 } plt;
2841 };
2842
2843 struct ppc64_elf_obj_tdata
2844 {
2845 struct elf_obj_tdata elf;
2846
2847 /* Shortcuts to dynamic linker sections. */
2848 asection *got;
2849 asection *relgot;
2850
2851 /* Used during garbage collection. We attach global symbols defined
2852 on removed .opd entries to this section so that the sym is removed. */
2853 asection *deleted_section;
2854
2855 /* TLS local dynamic got entry handling. Support for multiple GOT
2856 sections means we potentially need one of these for each input bfd. */
2857 struct got_entry tlsld_got;
2858
2859 union {
2860 /* A copy of relocs before they are modified for --emit-relocs. */
2861 Elf_Internal_Rela *relocs;
2862
2863 /* Section contents. */
2864 bfd_byte *contents;
2865 } opd;
2866
2867 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2868 the reloc to be in the range -32768 to 32767. */
2869 unsigned int has_small_toc_reloc : 1;
2870
2871 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2872 instruction not one we handle. */
2873 unsigned int unexpected_toc_insn : 1;
2874 };
2875
2876 #define ppc64_elf_tdata(bfd) \
2877 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2878
2879 #define ppc64_tlsld_got(bfd) \
2880 (&ppc64_elf_tdata (bfd)->tlsld_got)
2881
2882 #define is_ppc64_elf(bfd) \
2883 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2884 && elf_object_id (bfd) == PPC64_ELF_DATA)
2885
2886 /* Override the generic function because we store some extras. */
2887
2888 static bfd_boolean
2889 ppc64_elf_mkobject (bfd *abfd)
2890 {
2891 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2892 PPC64_ELF_DATA);
2893 }
2894
2895 /* Fix bad default arch selected for a 64 bit input bfd when the
2896 default is 32 bit. Also select arch based on apuinfo. */
2897
2898 static bfd_boolean
2899 ppc64_elf_object_p (bfd *abfd)
2900 {
2901 if (!abfd->arch_info->the_default)
2902 return TRUE;
2903
2904 if (abfd->arch_info->bits_per_word == 32)
2905 {
2906 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2907
2908 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2909 {
2910 /* Relies on arch after 32 bit default being 64 bit default. */
2911 abfd->arch_info = abfd->arch_info->next;
2912 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2913 }
2914 }
2915 return _bfd_elf_ppc_set_arch (abfd);
2916 }
2917
2918 /* Support for core dump NOTE sections. */
2919
2920 static bfd_boolean
2921 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2922 {
2923 size_t offset, size;
2924
2925 if (note->descsz != 504)
2926 return FALSE;
2927
2928 /* pr_cursig */
2929 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2930
2931 /* pr_pid */
2932 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2933
2934 /* pr_reg */
2935 offset = 112;
2936 size = 384;
2937
2938 /* Make a ".reg/999" section. */
2939 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2940 size, note->descpos + offset);
2941 }
2942
2943 static bfd_boolean
2944 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2945 {
2946 if (note->descsz != 136)
2947 return FALSE;
2948
2949 elf_tdata (abfd)->core->pid
2950 = bfd_get_32 (abfd, note->descdata + 24);
2951 elf_tdata (abfd)->core->program
2952 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2953 elf_tdata (abfd)->core->command
2954 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2955
2956 return TRUE;
2957 }
2958
2959 static char *
2960 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2961 ...)
2962 {
2963 switch (note_type)
2964 {
2965 default:
2966 return NULL;
2967
2968 case NT_PRPSINFO:
2969 {
2970 char data[136];
2971 va_list ap;
2972
2973 va_start (ap, note_type);
2974 memset (data, 0, sizeof (data));
2975 strncpy (data + 40, va_arg (ap, const char *), 16);
2976 strncpy (data + 56, va_arg (ap, const char *), 80);
2977 va_end (ap);
2978 return elfcore_write_note (abfd, buf, bufsiz,
2979 "CORE", note_type, data, sizeof (data));
2980 }
2981
2982 case NT_PRSTATUS:
2983 {
2984 char data[504];
2985 va_list ap;
2986 long pid;
2987 int cursig;
2988 const void *greg;
2989
2990 va_start (ap, note_type);
2991 memset (data, 0, 112);
2992 pid = va_arg (ap, long);
2993 bfd_put_32 (abfd, pid, data + 32);
2994 cursig = va_arg (ap, int);
2995 bfd_put_16 (abfd, cursig, data + 12);
2996 greg = va_arg (ap, const void *);
2997 memcpy (data + 112, greg, 384);
2998 memset (data + 496, 0, 8);
2999 va_end (ap);
3000 return elfcore_write_note (abfd, buf, bufsiz,
3001 "CORE", note_type, data, sizeof (data));
3002 }
3003 }
3004 }
3005
3006 /* Add extra PPC sections. */
3007
3008 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3009 {
3010 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3011 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3012 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3013 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3014 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3015 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3016 { NULL, 0, 0, 0, 0 }
3017 };
3018
3019 enum _ppc64_sec_type {
3020 sec_normal = 0,
3021 sec_opd = 1,
3022 sec_toc = 2
3023 };
3024
3025 struct _ppc64_elf_section_data
3026 {
3027 struct bfd_elf_section_data elf;
3028
3029 union
3030 {
3031 /* An array with one entry for each opd function descriptor,
3032 and some spares since opd entries may be either 16 or 24 bytes. */
3033 #define OPD_NDX(OFF) ((OFF) >> 4)
3034 struct _opd_sec_data
3035 {
3036 /* Points to the function code section for local opd entries. */
3037 asection **func_sec;
3038
3039 /* After editing .opd, adjust references to opd local syms. */
3040 long *adjust;
3041 } opd;
3042
3043 /* An array for toc sections, indexed by offset/8. */
3044 struct _toc_sec_data
3045 {
3046 /* Specifies the relocation symbol index used at a given toc offset. */
3047 unsigned *symndx;
3048
3049 /* And the relocation addend. */
3050 bfd_vma *add;
3051 } toc;
3052 } u;
3053
3054 enum _ppc64_sec_type sec_type:2;
3055
3056 /* Flag set when small branches are detected. Used to
3057 select suitable defaults for the stub group size. */
3058 unsigned int has_14bit_branch:1;
3059 };
3060
3061 #define ppc64_elf_section_data(sec) \
3062 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3063
3064 static bfd_boolean
3065 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3066 {
3067 if (!sec->used_by_bfd)
3068 {
3069 struct _ppc64_elf_section_data *sdata;
3070 bfd_size_type amt = sizeof (*sdata);
3071
3072 sdata = bfd_zalloc (abfd, amt);
3073 if (sdata == NULL)
3074 return FALSE;
3075 sec->used_by_bfd = sdata;
3076 }
3077
3078 return _bfd_elf_new_section_hook (abfd, sec);
3079 }
3080
3081 static struct _opd_sec_data *
3082 get_opd_info (asection * sec)
3083 {
3084 if (sec != NULL
3085 && ppc64_elf_section_data (sec) != NULL
3086 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3087 return &ppc64_elf_section_data (sec)->u.opd;
3088 return NULL;
3089 }
3090 \f
3091 /* Parameters for the qsort hook. */
3092 static bfd_boolean synthetic_relocatable;
3093 static asection *synthetic_opd;
3094
3095 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3096
3097 static int
3098 compare_symbols (const void *ap, const void *bp)
3099 {
3100 const asymbol *a = * (const asymbol **) ap;
3101 const asymbol *b = * (const asymbol **) bp;
3102
3103 /* Section symbols first. */
3104 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3105 return -1;
3106 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3107 return 1;
3108
3109 /* then .opd symbols. */
3110 if (synthetic_opd != NULL)
3111 {
3112 if (strcmp (a->section->name, ".opd") == 0
3113 && strcmp (b->section->name, ".opd") != 0)
3114 return -1;
3115 if (strcmp (a->section->name, ".opd") != 0
3116 && strcmp (b->section->name, ".opd") == 0)
3117 return 1;
3118 }
3119
3120 /* then other code symbols. */
3121 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3122 == (SEC_CODE | SEC_ALLOC)
3123 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3124 != (SEC_CODE | SEC_ALLOC))
3125 return -1;
3126
3127 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3128 != (SEC_CODE | SEC_ALLOC)
3129 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3130 == (SEC_CODE | SEC_ALLOC))
3131 return 1;
3132
3133 if (synthetic_relocatable)
3134 {
3135 if (a->section->id < b->section->id)
3136 return -1;
3137
3138 if (a->section->id > b->section->id)
3139 return 1;
3140 }
3141
3142 if (a->value + a->section->vma < b->value + b->section->vma)
3143 return -1;
3144
3145 if (a->value + a->section->vma > b->value + b->section->vma)
3146 return 1;
3147
3148 /* For syms with the same value, prefer strong dynamic global function
3149 syms over other syms. */
3150 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3151 return -1;
3152
3153 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3154 return 1;
3155
3156 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3157 return -1;
3158
3159 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3160 return 1;
3161
3162 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3163 return -1;
3164
3165 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3166 return 1;
3167
3168 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3172 return 1;
3173
3174 return 0;
3175 }
3176
3177 /* Search SYMS for a symbol of the given VALUE. */
3178
3179 static asymbol *
3180 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3181 {
3182 long mid;
3183
3184 if (id == (unsigned) -1)
3185 {
3186 while (lo < hi)
3187 {
3188 mid = (lo + hi) >> 1;
3189 if (syms[mid]->value + syms[mid]->section->vma < value)
3190 lo = mid + 1;
3191 else if (syms[mid]->value + syms[mid]->section->vma > value)
3192 hi = mid;
3193 else
3194 return syms[mid];
3195 }
3196 }
3197 else
3198 {
3199 while (lo < hi)
3200 {
3201 mid = (lo + hi) >> 1;
3202 if (syms[mid]->section->id < id)
3203 lo = mid + 1;
3204 else if (syms[mid]->section->id > id)
3205 hi = mid;
3206 else if (syms[mid]->value < value)
3207 lo = mid + 1;
3208 else if (syms[mid]->value > value)
3209 hi = mid;
3210 else
3211 return syms[mid];
3212 }
3213 }
3214 return NULL;
3215 }
3216
3217 static bfd_boolean
3218 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3219 {
3220 bfd_vma vma = *(bfd_vma *) ptr;
3221 return ((section->flags & SEC_ALLOC) != 0
3222 && section->vma <= vma
3223 && vma < section->vma + section->size);
3224 }
3225
3226 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3227 entry syms. Also generate @plt symbols for the glink branch table.
3228 Returns count of synthetic symbols in RET or -1 on error. */
3229
3230 static long
3231 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3232 long static_count, asymbol **static_syms,
3233 long dyn_count, asymbol **dyn_syms,
3234 asymbol **ret)
3235 {
3236 asymbol *s;
3237 long i;
3238 long count;
3239 char *names;
3240 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3241 asection *opd = NULL;
3242 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3243 asymbol **syms;
3244 int abi = abiversion (abfd);
3245
3246 *ret = NULL;
3247
3248 if (abi < 2)
3249 {
3250 opd = bfd_get_section_by_name (abfd, ".opd");
3251 if (opd == NULL && abi == 1)
3252 return 0;
3253 }
3254
3255 symcount = static_count;
3256 if (!relocatable)
3257 symcount += dyn_count;
3258 if (symcount == 0)
3259 return 0;
3260
3261 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3262 if (syms == NULL)
3263 return -1;
3264
3265 if (!relocatable && static_count != 0 && dyn_count != 0)
3266 {
3267 /* Use both symbol tables. */
3268 memcpy (syms, static_syms, static_count * sizeof (*syms));
3269 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3270 }
3271 else if (!relocatable && static_count == 0)
3272 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3273 else
3274 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3275
3276 synthetic_relocatable = relocatable;
3277 synthetic_opd = opd;
3278 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3279
3280 if (!relocatable && symcount > 1)
3281 {
3282 long j;
3283 /* Trim duplicate syms, since we may have merged the normal and
3284 dynamic symbols. Actually, we only care about syms that have
3285 different values, so trim any with the same value. */
3286 for (i = 1, j = 1; i < symcount; ++i)
3287 if (syms[i - 1]->value + syms[i - 1]->section->vma
3288 != syms[i]->value + syms[i]->section->vma)
3289 syms[j++] = syms[i];
3290 symcount = j;
3291 }
3292
3293 i = 0;
3294 /* Note that here and in compare_symbols we can't compare opd and
3295 sym->section directly. With separate debug info files, the
3296 symbols will be extracted from the debug file while abfd passed
3297 to this function is the real binary. */
3298 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3299 ++i;
3300 codesecsym = i;
3301
3302 for (; i < symcount; ++i)
3303 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3304 != (SEC_CODE | SEC_ALLOC))
3305 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3306 break;
3307 codesecsymend = i;
3308
3309 for (; i < symcount; ++i)
3310 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3311 break;
3312 secsymend = i;
3313
3314 if (opd != NULL)
3315 for (; i < symcount; ++i)
3316 if (strcmp (syms[i]->section->name, ".opd") != 0)
3317 break;
3318 opdsymend = i;
3319
3320 for (; i < symcount; ++i)
3321 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3322 != (SEC_CODE | SEC_ALLOC))
3323 break;
3324 symcount = i;
3325
3326 count = 0;
3327
3328 if (relocatable)
3329 {
3330 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3331 arelent *r;
3332 size_t size;
3333 long relcount;
3334
3335 if (opdsymend == secsymend)
3336 goto done;
3337
3338 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3339 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3340 if (relcount == 0)
3341 goto done;
3342
3343 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3344 {
3345 count = -1;
3346 goto done;
3347 }
3348
3349 size = 0;
3350 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3351 {
3352 asymbol *sym;
3353
3354 while (r < opd->relocation + relcount
3355 && r->address < syms[i]->value + opd->vma)
3356 ++r;
3357
3358 if (r == opd->relocation + relcount)
3359 break;
3360
3361 if (r->address != syms[i]->value + opd->vma)
3362 continue;
3363
3364 if (r->howto->type != R_PPC64_ADDR64)
3365 continue;
3366
3367 sym = *r->sym_ptr_ptr;
3368 if (!sym_exists_at (syms, opdsymend, symcount,
3369 sym->section->id, sym->value + r->addend))
3370 {
3371 ++count;
3372 size += sizeof (asymbol);
3373 size += strlen (syms[i]->name) + 2;
3374 }
3375 }
3376
3377 if (size == 0)
3378 goto done;
3379 s = *ret = bfd_malloc (size);
3380 if (s == NULL)
3381 {
3382 count = -1;
3383 goto done;
3384 }
3385
3386 names = (char *) (s + count);
3387
3388 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3389 {
3390 asymbol *sym;
3391
3392 while (r < opd->relocation + relcount
3393 && r->address < syms[i]->value + opd->vma)
3394 ++r;
3395
3396 if (r == opd->relocation + relcount)
3397 break;
3398
3399 if (r->address != syms[i]->value + opd->vma)
3400 continue;
3401
3402 if (r->howto->type != R_PPC64_ADDR64)
3403 continue;
3404
3405 sym = *r->sym_ptr_ptr;
3406 if (!sym_exists_at (syms, opdsymend, symcount,
3407 sym->section->id, sym->value + r->addend))
3408 {
3409 size_t len;
3410
3411 *s = *syms[i];
3412 s->flags |= BSF_SYNTHETIC;
3413 s->section = sym->section;
3414 s->value = sym->value + r->addend;
3415 s->name = names;
3416 *names++ = '.';
3417 len = strlen (syms[i]->name);
3418 memcpy (names, syms[i]->name, len + 1);
3419 names += len + 1;
3420 /* Have udata.p point back to the original symbol this
3421 synthetic symbol was derived from. */
3422 s->udata.p = syms[i];
3423 s++;
3424 }
3425 }
3426 }
3427 else
3428 {
3429 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3430 bfd_byte *contents = NULL;
3431 size_t size;
3432 long plt_count = 0;
3433 bfd_vma glink_vma = 0, resolv_vma = 0;
3434 asection *dynamic, *glink = NULL, *relplt = NULL;
3435 arelent *p;
3436
3437 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3438 {
3439 free_contents_and_exit_err:
3440 count = -1;
3441 free_contents_and_exit:
3442 if (contents)
3443 free (contents);
3444 goto done;
3445 }
3446
3447 size = 0;
3448 for (i = secsymend; i < opdsymend; ++i)
3449 {
3450 bfd_vma ent;
3451
3452 /* Ignore bogus symbols. */
3453 if (syms[i]->value > opd->size - 8)
3454 continue;
3455
3456 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3457 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3458 {
3459 ++count;
3460 size += sizeof (asymbol);
3461 size += strlen (syms[i]->name) + 2;
3462 }
3463 }
3464
3465 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3466 if (dyn_count != 0
3467 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3468 {
3469 bfd_byte *dynbuf, *extdyn, *extdynend;
3470 size_t extdynsize;
3471 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3472
3473 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3474 goto free_contents_and_exit_err;
3475
3476 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3477 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3478
3479 extdyn = dynbuf;
3480 extdynend = extdyn + dynamic->size;
3481 for (; extdyn < extdynend; extdyn += extdynsize)
3482 {
3483 Elf_Internal_Dyn dyn;
3484 (*swap_dyn_in) (abfd, extdyn, &dyn);
3485
3486 if (dyn.d_tag == DT_NULL)
3487 break;
3488
3489 if (dyn.d_tag == DT_PPC64_GLINK)
3490 {
3491 /* The first glink stub starts at offset 32; see
3492 comment in ppc64_elf_finish_dynamic_sections. */
3493 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3494 /* The .glink section usually does not survive the final
3495 link; search for the section (usually .text) where the
3496 glink stubs now reside. */
3497 glink = bfd_sections_find_if (abfd, section_covers_vma,
3498 &glink_vma);
3499 break;
3500 }
3501 }
3502
3503 free (dynbuf);
3504 }
3505
3506 if (glink != NULL)
3507 {
3508 /* Determine __glink trampoline by reading the relative branch
3509 from the first glink stub. */
3510 bfd_byte buf[4];
3511 unsigned int off = 0;
3512
3513 while (bfd_get_section_contents (abfd, glink, buf,
3514 glink_vma + off - glink->vma, 4))
3515 {
3516 unsigned int insn = bfd_get_32 (abfd, buf);
3517 insn ^= B_DOT;
3518 if ((insn & ~0x3fffffc) == 0)
3519 {
3520 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3521 break;
3522 }
3523 off += 4;
3524 if (off > 4)
3525 break;
3526 }
3527
3528 if (resolv_vma)
3529 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3530
3531 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3532 if (relplt != NULL)
3533 {
3534 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3535 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3536 goto free_contents_and_exit_err;
3537
3538 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3539 size += plt_count * sizeof (asymbol);
3540
3541 p = relplt->relocation;
3542 for (i = 0; i < plt_count; i++, p++)
3543 {
3544 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3545 if (p->addend != 0)
3546 size += sizeof ("+0x") - 1 + 16;
3547 }
3548 }
3549 }
3550
3551 if (size == 0)
3552 goto free_contents_and_exit;
3553 s = *ret = bfd_malloc (size);
3554 if (s == NULL)
3555 goto free_contents_and_exit_err;
3556
3557 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3558
3559 for (i = secsymend; i < opdsymend; ++i)
3560 {
3561 bfd_vma ent;
3562
3563 if (syms[i]->value > opd->size - 8)
3564 continue;
3565
3566 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3567 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3568 {
3569 long lo, hi;
3570 size_t len;
3571 asection *sec = abfd->sections;
3572
3573 *s = *syms[i];
3574 lo = codesecsym;
3575 hi = codesecsymend;
3576 while (lo < hi)
3577 {
3578 long mid = (lo + hi) >> 1;
3579 if (syms[mid]->section->vma < ent)
3580 lo = mid + 1;
3581 else if (syms[mid]->section->vma > ent)
3582 hi = mid;
3583 else
3584 {
3585 sec = syms[mid]->section;
3586 break;
3587 }
3588 }
3589
3590 if (lo >= hi && lo > codesecsym)
3591 sec = syms[lo - 1]->section;
3592
3593 for (; sec != NULL; sec = sec->next)
3594 {
3595 if (sec->vma > ent)
3596 break;
3597 /* SEC_LOAD may not be set if SEC is from a separate debug
3598 info file. */
3599 if ((sec->flags & SEC_ALLOC) == 0)
3600 break;
3601 if ((sec->flags & SEC_CODE) != 0)
3602 s->section = sec;
3603 }
3604 s->flags |= BSF_SYNTHETIC;
3605 s->value = ent - s->section->vma;
3606 s->name = names;
3607 *names++ = '.';
3608 len = strlen (syms[i]->name);
3609 memcpy (names, syms[i]->name, len + 1);
3610 names += len + 1;
3611 /* Have udata.p point back to the original symbol this
3612 synthetic symbol was derived from. */
3613 s->udata.p = syms[i];
3614 s++;
3615 }
3616 }
3617 free (contents);
3618
3619 if (glink != NULL && relplt != NULL)
3620 {
3621 if (resolv_vma)
3622 {
3623 /* Add a symbol for the main glink trampoline. */
3624 memset (s, 0, sizeof *s);
3625 s->the_bfd = abfd;
3626 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3627 s->section = glink;
3628 s->value = resolv_vma - glink->vma;
3629 s->name = names;
3630 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3631 names += sizeof ("__glink_PLTresolve");
3632 s++;
3633 count++;
3634 }
3635
3636 /* FIXME: It would be very much nicer to put sym@plt on the
3637 stub rather than on the glink branch table entry. The
3638 objdump disassembler would then use a sensible symbol
3639 name on plt calls. The difficulty in doing so is
3640 a) finding the stubs, and,
3641 b) matching stubs against plt entries, and,
3642 c) there can be multiple stubs for a given plt entry.
3643
3644 Solving (a) could be done by code scanning, but older
3645 ppc64 binaries used different stubs to current code.
3646 (b) is the tricky one since you need to known the toc
3647 pointer for at least one function that uses a pic stub to
3648 be able to calculate the plt address referenced.
3649 (c) means gdb would need to set multiple breakpoints (or
3650 find the glink branch itself) when setting breakpoints
3651 for pending shared library loads. */
3652 p = relplt->relocation;
3653 for (i = 0; i < plt_count; i++, p++)
3654 {
3655 size_t len;
3656
3657 *s = **p->sym_ptr_ptr;
3658 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3659 we are defining a symbol, ensure one of them is set. */
3660 if ((s->flags & BSF_LOCAL) == 0)
3661 s->flags |= BSF_GLOBAL;
3662 s->flags |= BSF_SYNTHETIC;
3663 s->section = glink;
3664 s->value = glink_vma - glink->vma;
3665 s->name = names;
3666 s->udata.p = NULL;
3667 len = strlen ((*p->sym_ptr_ptr)->name);
3668 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3669 names += len;
3670 if (p->addend != 0)
3671 {
3672 memcpy (names, "+0x", sizeof ("+0x") - 1);
3673 names += sizeof ("+0x") - 1;
3674 bfd_sprintf_vma (abfd, names, p->addend);
3675 names += strlen (names);
3676 }
3677 memcpy (names, "@plt", sizeof ("@plt"));
3678 names += sizeof ("@plt");
3679 s++;
3680 if (abi < 2)
3681 {
3682 glink_vma += 8;
3683 if (i >= 0x8000)
3684 glink_vma += 4;
3685 }
3686 else
3687 glink_vma += 4;
3688 }
3689 count += plt_count;
3690 }
3691 }
3692
3693 done:
3694 free (syms);
3695 return count;
3696 }
3697 \f
3698 /* The following functions are specific to the ELF linker, while
3699 functions above are used generally. Those named ppc64_elf_* are
3700 called by the main ELF linker code. They appear in this file more
3701 or less in the order in which they are called. eg.
3702 ppc64_elf_check_relocs is called early in the link process,
3703 ppc64_elf_finish_dynamic_sections is one of the last functions
3704 called.
3705
3706 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3707 functions have both a function code symbol and a function descriptor
3708 symbol. A call to foo in a relocatable object file looks like:
3709
3710 . .text
3711 . x:
3712 . bl .foo
3713 . nop
3714
3715 The function definition in another object file might be:
3716
3717 . .section .opd
3718 . foo: .quad .foo
3719 . .quad .TOC.@tocbase
3720 . .quad 0
3721 .
3722 . .text
3723 . .foo: blr
3724
3725 When the linker resolves the call during a static link, the branch
3726 unsurprisingly just goes to .foo and the .opd information is unused.
3727 If the function definition is in a shared library, things are a little
3728 different: The call goes via a plt call stub, the opd information gets
3729 copied to the plt, and the linker patches the nop.
3730
3731 . x:
3732 . bl .foo_stub
3733 . ld 2,40(1)
3734 .
3735 .
3736 . .foo_stub:
3737 . std 2,40(1) # in practice, the call stub
3738 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3739 . addi 11,11,Lfoo@toc@l # this is the general idea
3740 . ld 12,0(11)
3741 . ld 2,8(11)
3742 . mtctr 12
3743 . ld 11,16(11)
3744 . bctr
3745 .
3746 . .section .plt
3747 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3748
3749 The "reloc ()" notation is supposed to indicate that the linker emits
3750 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3751 copying.
3752
3753 What are the difficulties here? Well, firstly, the relocations
3754 examined by the linker in check_relocs are against the function code
3755 sym .foo, while the dynamic relocation in the plt is emitted against
3756 the function descriptor symbol, foo. Somewhere along the line, we need
3757 to carefully copy dynamic link information from one symbol to the other.
3758 Secondly, the generic part of the elf linker will make .foo a dynamic
3759 symbol as is normal for most other backends. We need foo dynamic
3760 instead, at least for an application final link. However, when
3761 creating a shared library containing foo, we need to have both symbols
3762 dynamic so that references to .foo are satisfied during the early
3763 stages of linking. Otherwise the linker might decide to pull in a
3764 definition from some other object, eg. a static library.
3765
3766 Update: As of August 2004, we support a new convention. Function
3767 calls may use the function descriptor symbol, ie. "bl foo". This
3768 behaves exactly as "bl .foo". */
3769
3770 /* Of those relocs that might be copied as dynamic relocs, this function
3771 selects those that must be copied when linking a shared library,
3772 even when the symbol is local. */
3773
3774 static int
3775 must_be_dyn_reloc (struct bfd_link_info *info,
3776 enum elf_ppc64_reloc_type r_type)
3777 {
3778 switch (r_type)
3779 {
3780 default:
3781 return 1;
3782
3783 case R_PPC64_REL32:
3784 case R_PPC64_REL64:
3785 case R_PPC64_REL30:
3786 return 0;
3787
3788 case R_PPC64_TPREL16:
3789 case R_PPC64_TPREL16_LO:
3790 case R_PPC64_TPREL16_HI:
3791 case R_PPC64_TPREL16_HA:
3792 case R_PPC64_TPREL16_DS:
3793 case R_PPC64_TPREL16_LO_DS:
3794 case R_PPC64_TPREL16_HIGH:
3795 case R_PPC64_TPREL16_HIGHA:
3796 case R_PPC64_TPREL16_HIGHER:
3797 case R_PPC64_TPREL16_HIGHERA:
3798 case R_PPC64_TPREL16_HIGHEST:
3799 case R_PPC64_TPREL16_HIGHESTA:
3800 case R_PPC64_TPREL64:
3801 return !bfd_link_executable (info);
3802 }
3803 }
3804
3805 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3806 copying dynamic variables from a shared lib into an app's dynbss
3807 section, and instead use a dynamic relocation to point into the
3808 shared lib. With code that gcc generates, it's vital that this be
3809 enabled; In the PowerPC64 ABI, the address of a function is actually
3810 the address of a function descriptor, which resides in the .opd
3811 section. gcc uses the descriptor directly rather than going via the
3812 GOT as some other ABI's do, which means that initialized function
3813 pointers must reference the descriptor. Thus, a function pointer
3814 initialized to the address of a function in a shared library will
3815 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3816 redefines the function descriptor symbol to point to the copy. This
3817 presents a problem as a plt entry for that function is also
3818 initialized from the function descriptor symbol and the copy reloc
3819 may not be initialized first. */
3820 #define ELIMINATE_COPY_RELOCS 1
3821
3822 /* Section name for stubs is the associated section name plus this
3823 string. */
3824 #define STUB_SUFFIX ".stub"
3825
3826 /* Linker stubs.
3827 ppc_stub_long_branch:
3828 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3829 destination, but a 24 bit branch in a stub section will reach.
3830 . b dest
3831
3832 ppc_stub_plt_branch:
3833 Similar to the above, but a 24 bit branch in the stub section won't
3834 reach its destination.
3835 . addis %r11,%r2,xxx@toc@ha
3836 . ld %r12,xxx@toc@l(%r11)
3837 . mtctr %r12
3838 . bctr
3839
3840 ppc_stub_plt_call:
3841 Used to call a function in a shared library. If it so happens that
3842 the plt entry referenced crosses a 64k boundary, then an extra
3843 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3844 . std %r2,40(%r1)
3845 . addis %r11,%r2,xxx@toc@ha
3846 . ld %r12,xxx+0@toc@l(%r11)
3847 . mtctr %r12
3848 . ld %r2,xxx+8@toc@l(%r11)
3849 . ld %r11,xxx+16@toc@l(%r11)
3850 . bctr
3851
3852 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3853 code to adjust the value and save r2 to support multiple toc sections.
3854 A ppc_stub_long_branch with an r2 offset looks like:
3855 . std %r2,40(%r1)
3856 . addis %r2,%r2,off@ha
3857 . addi %r2,%r2,off@l
3858 . b dest
3859
3860 A ppc_stub_plt_branch with an r2 offset looks like:
3861 . std %r2,40(%r1)
3862 . addis %r11,%r2,xxx@toc@ha
3863 . ld %r12,xxx@toc@l(%r11)
3864 . addis %r2,%r2,off@ha
3865 . addi %r2,%r2,off@l
3866 . mtctr %r12
3867 . bctr
3868
3869 In cases where the "addis" instruction would add zero, the "addis" is
3870 omitted and following instructions modified slightly in some cases.
3871 */
3872
3873 enum ppc_stub_type {
3874 ppc_stub_none,
3875 ppc_stub_long_branch,
3876 ppc_stub_long_branch_r2off,
3877 ppc_stub_plt_branch,
3878 ppc_stub_plt_branch_r2off,
3879 ppc_stub_plt_call,
3880 ppc_stub_plt_call_r2save,
3881 ppc_stub_global_entry,
3882 ppc_stub_save_res
3883 };
3884
3885 /* Information on stub grouping. */
3886 struct map_stub
3887 {
3888 /* The stub section. */
3889 asection *stub_sec;
3890 /* This is the section to which stubs in the group will be attached. */
3891 asection *link_sec;
3892 /* Next group. */
3893 struct map_stub *next;
3894 /* Whether to emit a copy of register save/restore functions in this
3895 group. */
3896 int needs_save_res;
3897 };
3898
3899 struct ppc_stub_hash_entry {
3900
3901 /* Base hash table entry structure. */
3902 struct bfd_hash_entry root;
3903
3904 enum ppc_stub_type stub_type;
3905
3906 /* Group information. */
3907 struct map_stub *group;
3908
3909 /* Offset within stub_sec of the beginning of this stub. */
3910 bfd_vma stub_offset;
3911
3912 /* Given the symbol's value and its section we can determine its final
3913 value when building the stubs (so the stub knows where to jump. */
3914 bfd_vma target_value;
3915 asection *target_section;
3916
3917 /* The symbol table entry, if any, that this was derived from. */
3918 struct ppc_link_hash_entry *h;
3919 struct plt_entry *plt_ent;
3920
3921 /* Symbol st_other. */
3922 unsigned char other;
3923 };
3924
3925 struct ppc_branch_hash_entry {
3926
3927 /* Base hash table entry structure. */
3928 struct bfd_hash_entry root;
3929
3930 /* Offset within branch lookup table. */
3931 unsigned int offset;
3932
3933 /* Generation marker. */
3934 unsigned int iter;
3935 };
3936
3937 /* Used to track dynamic relocations for local symbols. */
3938 struct ppc_dyn_relocs
3939 {
3940 struct ppc_dyn_relocs *next;
3941
3942 /* The input section of the reloc. */
3943 asection *sec;
3944
3945 /* Total number of relocs copied for the input section. */
3946 unsigned int count : 31;
3947
3948 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3949 unsigned int ifunc : 1;
3950 };
3951
3952 struct ppc_link_hash_entry
3953 {
3954 struct elf_link_hash_entry elf;
3955
3956 union {
3957 /* A pointer to the most recently used stub hash entry against this
3958 symbol. */
3959 struct ppc_stub_hash_entry *stub_cache;
3960
3961 /* A pointer to the next symbol starting with a '.' */
3962 struct ppc_link_hash_entry *next_dot_sym;
3963 } u;
3964
3965 /* Track dynamic relocs copied for this symbol. */
3966 struct elf_dyn_relocs *dyn_relocs;
3967
3968 /* Chain of aliases referring to a weakdef. */
3969 struct ppc_link_hash_entry *weakref;
3970
3971 /* Link between function code and descriptor symbols. */
3972 struct ppc_link_hash_entry *oh;
3973
3974 /* Flag function code and descriptor symbols. */
3975 unsigned int is_func:1;
3976 unsigned int is_func_descriptor:1;
3977 unsigned int fake:1;
3978
3979 /* Whether global opd/toc sym has been adjusted or not.
3980 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3981 should be set for all globals defined in any opd/toc section. */
3982 unsigned int adjust_done:1;
3983
3984 /* Set if this is an out-of-line register save/restore function,
3985 with non-standard calling convention. */
3986 unsigned int save_res:1;
3987
3988 /* Contexts in which symbol is used in the GOT (or TOC).
3989 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3990 corresponding relocs are encountered during check_relocs.
3991 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3992 indicate the corresponding GOT entry type is not needed.
3993 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3994 a TPREL one. We use a separate flag rather than setting TPREL
3995 just for convenience in distinguishing the two cases. */
3996 #define TLS_GD 1 /* GD reloc. */
3997 #define TLS_LD 2 /* LD reloc. */
3998 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3999 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4000 #define TLS_TLS 16 /* Any TLS reloc. */
4001 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4002 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4003 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4004 unsigned char tls_mask;
4005 };
4006
4007 /* ppc64 ELF linker hash table. */
4008
4009 struct ppc_link_hash_table
4010 {
4011 struct elf_link_hash_table elf;
4012
4013 /* The stub hash table. */
4014 struct bfd_hash_table stub_hash_table;
4015
4016 /* Another hash table for plt_branch stubs. */
4017 struct bfd_hash_table branch_hash_table;
4018
4019 /* Hash table for function prologue tocsave. */
4020 htab_t tocsave_htab;
4021
4022 /* Various options and other info passed from the linker. */
4023 struct ppc64_elf_params *params;
4024
4025 /* The size of sec_info below. */
4026 unsigned int sec_info_arr_size;
4027
4028 /* Per-section array of extra section info. Done this way rather
4029 than as part of ppc64_elf_section_data so we have the info for
4030 non-ppc64 sections. */
4031 struct
4032 {
4033 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4034 bfd_vma toc_off;
4035
4036 union
4037 {
4038 /* The section group that this section belongs to. */
4039 struct map_stub *group;
4040 /* A temp section list pointer. */
4041 asection *list;
4042 } u;
4043 } *sec_info;
4044
4045 /* Linked list of groups. */
4046 struct map_stub *group;
4047
4048 /* Temp used when calculating TOC pointers. */
4049 bfd_vma toc_curr;
4050 bfd *toc_bfd;
4051 asection *toc_first_sec;
4052
4053 /* Used when adding symbols. */
4054 struct ppc_link_hash_entry *dot_syms;
4055
4056 /* Shortcuts to get to dynamic linker sections. */
4057 asection *glink;
4058 asection *sfpr;
4059 asection *brlt;
4060 asection *relbrlt;
4061 asection *glink_eh_frame;
4062
4063 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4064 struct ppc_link_hash_entry *tls_get_addr;
4065 struct ppc_link_hash_entry *tls_get_addr_fd;
4066
4067 /* The size of reliplt used by got entry relocs. */
4068 bfd_size_type got_reli_size;
4069
4070 /* Statistics. */
4071 unsigned long stub_count[ppc_stub_global_entry];
4072
4073 /* Number of stubs against global syms. */
4074 unsigned long stub_globals;
4075
4076 /* Set if we're linking code with function descriptors. */
4077 unsigned int opd_abi:1;
4078
4079 /* Support for multiple toc sections. */
4080 unsigned int do_multi_toc:1;
4081 unsigned int multi_toc_needed:1;
4082 unsigned int second_toc_pass:1;
4083 unsigned int do_toc_opt:1;
4084
4085 /* Set on error. */
4086 unsigned int stub_error:1;
4087
4088 /* Whether func_desc_adjust needs to be run over symbols. */
4089 unsigned int need_func_desc_adj:1;
4090
4091 /* Incremented every time we size stubs. */
4092 unsigned int stub_iteration;
4093
4094 /* Small local sym cache. */
4095 struct sym_cache sym_cache;
4096 };
4097
4098 /* Rename some of the generic section flags to better document how they
4099 are used here. */
4100
4101 /* Nonzero if this section has TLS related relocations. */
4102 #define has_tls_reloc sec_flg0
4103
4104 /* Nonzero if this section has a call to __tls_get_addr. */
4105 #define has_tls_get_addr_call sec_flg1
4106
4107 /* Nonzero if this section has any toc or got relocs. */
4108 #define has_toc_reloc sec_flg2
4109
4110 /* Nonzero if this section has a call to another section that uses
4111 the toc or got. */
4112 #define makes_toc_func_call sec_flg3
4113
4114 /* Recursion protection when determining above flag. */
4115 #define call_check_in_progress sec_flg4
4116 #define call_check_done sec_flg5
4117
4118 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4119
4120 #define ppc_hash_table(p) \
4121 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4122 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4123
4124 #define ppc_stub_hash_lookup(table, string, create, copy) \
4125 ((struct ppc_stub_hash_entry *) \
4126 bfd_hash_lookup ((table), (string), (create), (copy)))
4127
4128 #define ppc_branch_hash_lookup(table, string, create, copy) \
4129 ((struct ppc_branch_hash_entry *) \
4130 bfd_hash_lookup ((table), (string), (create), (copy)))
4131
4132 /* Create an entry in the stub hash table. */
4133
4134 static struct bfd_hash_entry *
4135 stub_hash_newfunc (struct bfd_hash_entry *entry,
4136 struct bfd_hash_table *table,
4137 const char *string)
4138 {
4139 /* Allocate the structure if it has not already been allocated by a
4140 subclass. */
4141 if (entry == NULL)
4142 {
4143 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4144 if (entry == NULL)
4145 return entry;
4146 }
4147
4148 /* Call the allocation method of the superclass. */
4149 entry = bfd_hash_newfunc (entry, table, string);
4150 if (entry != NULL)
4151 {
4152 struct ppc_stub_hash_entry *eh;
4153
4154 /* Initialize the local fields. */
4155 eh = (struct ppc_stub_hash_entry *) entry;
4156 eh->stub_type = ppc_stub_none;
4157 eh->group = NULL;
4158 eh->stub_offset = 0;
4159 eh->target_value = 0;
4160 eh->target_section = NULL;
4161 eh->h = NULL;
4162 eh->plt_ent = NULL;
4163 eh->other = 0;
4164 }
4165
4166 return entry;
4167 }
4168
4169 /* Create an entry in the branch hash table. */
4170
4171 static struct bfd_hash_entry *
4172 branch_hash_newfunc (struct bfd_hash_entry *entry,
4173 struct bfd_hash_table *table,
4174 const char *string)
4175 {
4176 /* Allocate the structure if it has not already been allocated by a
4177 subclass. */
4178 if (entry == NULL)
4179 {
4180 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4181 if (entry == NULL)
4182 return entry;
4183 }
4184
4185 /* Call the allocation method of the superclass. */
4186 entry = bfd_hash_newfunc (entry, table, string);
4187 if (entry != NULL)
4188 {
4189 struct ppc_branch_hash_entry *eh;
4190
4191 /* Initialize the local fields. */
4192 eh = (struct ppc_branch_hash_entry *) entry;
4193 eh->offset = 0;
4194 eh->iter = 0;
4195 }
4196
4197 return entry;
4198 }
4199
4200 /* Create an entry in a ppc64 ELF linker hash table. */
4201
4202 static struct bfd_hash_entry *
4203 link_hash_newfunc (struct bfd_hash_entry *entry,
4204 struct bfd_hash_table *table,
4205 const char *string)
4206 {
4207 /* Allocate the structure if it has not already been allocated by a
4208 subclass. */
4209 if (entry == NULL)
4210 {
4211 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4212 if (entry == NULL)
4213 return entry;
4214 }
4215
4216 /* Call the allocation method of the superclass. */
4217 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4218 if (entry != NULL)
4219 {
4220 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4221
4222 memset (&eh->u.stub_cache, 0,
4223 (sizeof (struct ppc_link_hash_entry)
4224 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4225
4226 /* When making function calls, old ABI code references function entry
4227 points (dot symbols), while new ABI code references the function
4228 descriptor symbol. We need to make any combination of reference and
4229 definition work together, without breaking archive linking.
4230
4231 For a defined function "foo" and an undefined call to "bar":
4232 An old object defines "foo" and ".foo", references ".bar" (possibly
4233 "bar" too).
4234 A new object defines "foo" and references "bar".
4235
4236 A new object thus has no problem with its undefined symbols being
4237 satisfied by definitions in an old object. On the other hand, the
4238 old object won't have ".bar" satisfied by a new object.
4239
4240 Keep a list of newly added dot-symbols. */
4241
4242 if (string[0] == '.')
4243 {
4244 struct ppc_link_hash_table *htab;
4245
4246 htab = (struct ppc_link_hash_table *) table;
4247 eh->u.next_dot_sym = htab->dot_syms;
4248 htab->dot_syms = eh;
4249 }
4250 }
4251
4252 return entry;
4253 }
4254
4255 struct tocsave_entry {
4256 asection *sec;
4257 bfd_vma offset;
4258 };
4259
4260 static hashval_t
4261 tocsave_htab_hash (const void *p)
4262 {
4263 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4264 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4265 }
4266
4267 static int
4268 tocsave_htab_eq (const void *p1, const void *p2)
4269 {
4270 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4271 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4272 return e1->sec == e2->sec && e1->offset == e2->offset;
4273 }
4274
4275 /* Destroy a ppc64 ELF linker hash table. */
4276
4277 static void
4278 ppc64_elf_link_hash_table_free (bfd *obfd)
4279 {
4280 struct ppc_link_hash_table *htab;
4281
4282 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4283 if (htab->tocsave_htab)
4284 htab_delete (htab->tocsave_htab);
4285 bfd_hash_table_free (&htab->branch_hash_table);
4286 bfd_hash_table_free (&htab->stub_hash_table);
4287 _bfd_elf_link_hash_table_free (obfd);
4288 }
4289
4290 /* Create a ppc64 ELF linker hash table. */
4291
4292 static struct bfd_link_hash_table *
4293 ppc64_elf_link_hash_table_create (bfd *abfd)
4294 {
4295 struct ppc_link_hash_table *htab;
4296 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4297
4298 htab = bfd_zmalloc (amt);
4299 if (htab == NULL)
4300 return NULL;
4301
4302 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4303 sizeof (struct ppc_link_hash_entry),
4304 PPC64_ELF_DATA))
4305 {
4306 free (htab);
4307 return NULL;
4308 }
4309
4310 /* Init the stub hash table too. */
4311 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4312 sizeof (struct ppc_stub_hash_entry)))
4313 {
4314 _bfd_elf_link_hash_table_free (abfd);
4315 return NULL;
4316 }
4317
4318 /* And the branch hash table. */
4319 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4320 sizeof (struct ppc_branch_hash_entry)))
4321 {
4322 bfd_hash_table_free (&htab->stub_hash_table);
4323 _bfd_elf_link_hash_table_free (abfd);
4324 return NULL;
4325 }
4326
4327 htab->tocsave_htab = htab_try_create (1024,
4328 tocsave_htab_hash,
4329 tocsave_htab_eq,
4330 NULL);
4331 if (htab->tocsave_htab == NULL)
4332 {
4333 ppc64_elf_link_hash_table_free (abfd);
4334 return NULL;
4335 }
4336 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4337
4338 /* Initializing two fields of the union is just cosmetic. We really
4339 only care about glist, but when compiled on a 32-bit host the
4340 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4341 debugger inspection of these fields look nicer. */
4342 htab->elf.init_got_refcount.refcount = 0;
4343 htab->elf.init_got_refcount.glist = NULL;
4344 htab->elf.init_plt_refcount.refcount = 0;
4345 htab->elf.init_plt_refcount.glist = NULL;
4346 htab->elf.init_got_offset.offset = 0;
4347 htab->elf.init_got_offset.glist = NULL;
4348 htab->elf.init_plt_offset.offset = 0;
4349 htab->elf.init_plt_offset.glist = NULL;
4350
4351 return &htab->elf.root;
4352 }
4353
4354 /* Create sections for linker generated code. */
4355
4356 static bfd_boolean
4357 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4358 {
4359 struct ppc_link_hash_table *htab;
4360 flagword flags;
4361
4362 htab = ppc_hash_table (info);
4363
4364 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4365 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4366 if (htab->params->save_restore_funcs)
4367 {
4368 /* Create .sfpr for code to save and restore fp regs. */
4369 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4370 flags);
4371 if (htab->sfpr == NULL
4372 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4373 return FALSE;
4374 }
4375
4376 if (bfd_link_relocatable (info))
4377 return TRUE;
4378
4379 /* Create .glink for lazy dynamic linking support. */
4380 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4381 flags);
4382 if (htab->glink == NULL
4383 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4384 return FALSE;
4385
4386 if (!info->no_ld_generated_unwind_info)
4387 {
4388 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4389 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4390 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4391 ".eh_frame",
4392 flags);
4393 if (htab->glink_eh_frame == NULL
4394 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4395 return FALSE;
4396 }
4397
4398 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4399 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4400 if (htab->elf.iplt == NULL
4401 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4402 return FALSE;
4403
4404 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4405 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4406 htab->elf.irelplt
4407 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4408 if (htab->elf.irelplt == NULL
4409 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4410 return FALSE;
4411
4412 /* Create branch lookup table for plt_branch stubs. */
4413 flags = (SEC_ALLOC | SEC_LOAD
4414 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4415 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4416 flags);
4417 if (htab->brlt == NULL
4418 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4419 return FALSE;
4420
4421 if (!bfd_link_pic (info))
4422 return TRUE;
4423
4424 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4425 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4426 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4427 ".rela.branch_lt",
4428 flags);
4429 if (htab->relbrlt == NULL
4430 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4431 return FALSE;
4432
4433 return TRUE;
4434 }
4435
4436 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4437
4438 bfd_boolean
4439 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4440 struct ppc64_elf_params *params)
4441 {
4442 struct ppc_link_hash_table *htab;
4443
4444 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4445
4446 /* Always hook our dynamic sections into the first bfd, which is the
4447 linker created stub bfd. This ensures that the GOT header is at
4448 the start of the output TOC section. */
4449 htab = ppc_hash_table (info);
4450 htab->elf.dynobj = params->stub_bfd;
4451 htab->params = params;
4452
4453 return create_linkage_sections (htab->elf.dynobj, info);
4454 }
4455
4456 /* Build a name for an entry in the stub hash table. */
4457
4458 static char *
4459 ppc_stub_name (const asection *input_section,
4460 const asection *sym_sec,
4461 const struct ppc_link_hash_entry *h,
4462 const Elf_Internal_Rela *rel)
4463 {
4464 char *stub_name;
4465 ssize_t len;
4466
4467 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4468 offsets from a sym as a branch target? In fact, we could
4469 probably assume the addend is always zero. */
4470 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4471
4472 if (h)
4473 {
4474 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4475 stub_name = bfd_malloc (len);
4476 if (stub_name == NULL)
4477 return stub_name;
4478
4479 len = sprintf (stub_name, "%08x.%s+%x",
4480 input_section->id & 0xffffffff,
4481 h->elf.root.root.string,
4482 (int) rel->r_addend & 0xffffffff);
4483 }
4484 else
4485 {
4486 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4487 stub_name = bfd_malloc (len);
4488 if (stub_name == NULL)
4489 return stub_name;
4490
4491 len = sprintf (stub_name, "%08x.%x:%x+%x",
4492 input_section->id & 0xffffffff,
4493 sym_sec->id & 0xffffffff,
4494 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4495 (int) rel->r_addend & 0xffffffff);
4496 }
4497 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4498 stub_name[len - 2] = 0;
4499 return stub_name;
4500 }
4501
4502 /* Look up an entry in the stub hash. Stub entries are cached because
4503 creating the stub name takes a bit of time. */
4504
4505 static struct ppc_stub_hash_entry *
4506 ppc_get_stub_entry (const asection *input_section,
4507 const asection *sym_sec,
4508 struct ppc_link_hash_entry *h,
4509 const Elf_Internal_Rela *rel,
4510 struct ppc_link_hash_table *htab)
4511 {
4512 struct ppc_stub_hash_entry *stub_entry;
4513 struct map_stub *group;
4514
4515 /* If this input section is part of a group of sections sharing one
4516 stub section, then use the id of the first section in the group.
4517 Stub names need to include a section id, as there may well be
4518 more than one stub used to reach say, printf, and we need to
4519 distinguish between them. */
4520 group = htab->sec_info[input_section->id].u.group;
4521 if (group == NULL)
4522 return NULL;
4523
4524 if (h != NULL && h->u.stub_cache != NULL
4525 && h->u.stub_cache->h == h
4526 && h->u.stub_cache->group == group)
4527 {
4528 stub_entry = h->u.stub_cache;
4529 }
4530 else
4531 {
4532 char *stub_name;
4533
4534 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4535 if (stub_name == NULL)
4536 return NULL;
4537
4538 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4539 stub_name, FALSE, FALSE);
4540 if (h != NULL)
4541 h->u.stub_cache = stub_entry;
4542
4543 free (stub_name);
4544 }
4545
4546 return stub_entry;
4547 }
4548
4549 /* Add a new stub entry to the stub hash. Not all fields of the new
4550 stub entry are initialised. */
4551
4552 static struct ppc_stub_hash_entry *
4553 ppc_add_stub (const char *stub_name,
4554 asection *section,
4555 struct bfd_link_info *info)
4556 {
4557 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4558 struct map_stub *group;
4559 asection *link_sec;
4560 asection *stub_sec;
4561 struct ppc_stub_hash_entry *stub_entry;
4562
4563 group = htab->sec_info[section->id].u.group;
4564 link_sec = group->link_sec;
4565 stub_sec = group->stub_sec;
4566 if (stub_sec == NULL)
4567 {
4568 size_t namelen;
4569 bfd_size_type len;
4570 char *s_name;
4571
4572 namelen = strlen (link_sec->name);
4573 len = namelen + sizeof (STUB_SUFFIX);
4574 s_name = bfd_alloc (htab->params->stub_bfd, len);
4575 if (s_name == NULL)
4576 return NULL;
4577
4578 memcpy (s_name, link_sec->name, namelen);
4579 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4580 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4581 if (stub_sec == NULL)
4582 return NULL;
4583 group->stub_sec = stub_sec;
4584 }
4585
4586 /* Enter this entry into the linker stub hash table. */
4587 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4588 TRUE, FALSE);
4589 if (stub_entry == NULL)
4590 {
4591 /* xgettext:c-format */
4592 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4593 section->owner, stub_name);
4594 return NULL;
4595 }
4596
4597 stub_entry->group = group;
4598 stub_entry->stub_offset = 0;
4599 return stub_entry;
4600 }
4601
4602 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4603 not already done. */
4604
4605 static bfd_boolean
4606 create_got_section (bfd *abfd, struct bfd_link_info *info)
4607 {
4608 asection *got, *relgot;
4609 flagword flags;
4610 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4611
4612 if (!is_ppc64_elf (abfd))
4613 return FALSE;
4614 if (htab == NULL)
4615 return FALSE;
4616
4617 if (!htab->elf.sgot
4618 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4619 return FALSE;
4620
4621 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4622 | SEC_LINKER_CREATED);
4623
4624 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4625 if (!got
4626 || !bfd_set_section_alignment (abfd, got, 3))
4627 return FALSE;
4628
4629 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4630 flags | SEC_READONLY);
4631 if (!relgot
4632 || ! bfd_set_section_alignment (abfd, relgot, 3))
4633 return FALSE;
4634
4635 ppc64_elf_tdata (abfd)->got = got;
4636 ppc64_elf_tdata (abfd)->relgot = relgot;
4637 return TRUE;
4638 }
4639
4640 /* Follow indirect and warning symbol links. */
4641
4642 static inline struct bfd_link_hash_entry *
4643 follow_link (struct bfd_link_hash_entry *h)
4644 {
4645 while (h->type == bfd_link_hash_indirect
4646 || h->type == bfd_link_hash_warning)
4647 h = h->u.i.link;
4648 return h;
4649 }
4650
4651 static inline struct elf_link_hash_entry *
4652 elf_follow_link (struct elf_link_hash_entry *h)
4653 {
4654 return (struct elf_link_hash_entry *) follow_link (&h->root);
4655 }
4656
4657 static inline struct ppc_link_hash_entry *
4658 ppc_follow_link (struct ppc_link_hash_entry *h)
4659 {
4660 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4661 }
4662
4663 /* Merge PLT info on FROM with that on TO. */
4664
4665 static void
4666 move_plt_plist (struct ppc_link_hash_entry *from,
4667 struct ppc_link_hash_entry *to)
4668 {
4669 if (from->elf.plt.plist != NULL)
4670 {
4671 if (to->elf.plt.plist != NULL)
4672 {
4673 struct plt_entry **entp;
4674 struct plt_entry *ent;
4675
4676 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4677 {
4678 struct plt_entry *dent;
4679
4680 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4681 if (dent->addend == ent->addend)
4682 {
4683 dent->plt.refcount += ent->plt.refcount;
4684 *entp = ent->next;
4685 break;
4686 }
4687 if (dent == NULL)
4688 entp = &ent->next;
4689 }
4690 *entp = to->elf.plt.plist;
4691 }
4692
4693 to->elf.plt.plist = from->elf.plt.plist;
4694 from->elf.plt.plist = NULL;
4695 }
4696 }
4697
4698 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4699
4700 static void
4701 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4702 struct elf_link_hash_entry *dir,
4703 struct elf_link_hash_entry *ind)
4704 {
4705 struct ppc_link_hash_entry *edir, *eind;
4706
4707 edir = (struct ppc_link_hash_entry *) dir;
4708 eind = (struct ppc_link_hash_entry *) ind;
4709
4710 edir->is_func |= eind->is_func;
4711 edir->is_func_descriptor |= eind->is_func_descriptor;
4712 edir->tls_mask |= eind->tls_mask;
4713 if (eind->oh != NULL)
4714 edir->oh = ppc_follow_link (eind->oh);
4715
4716 /* If called to transfer flags for a weakdef during processing
4717 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4718 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4719 if (!(ELIMINATE_COPY_RELOCS
4720 && eind->elf.root.type != bfd_link_hash_indirect
4721 && edir->elf.dynamic_adjusted))
4722 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4723
4724 if (edir->elf.versioned != versioned_hidden)
4725 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4726 edir->elf.ref_regular |= eind->elf.ref_regular;
4727 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4728 edir->elf.needs_plt |= eind->elf.needs_plt;
4729 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4730
4731 /* If we were called to copy over info for a weak sym, don't copy
4732 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4733 in order to simplify readonly_dynrelocs and save a field in the
4734 symbol hash entry, but that means dyn_relocs can't be used in any
4735 tests about a specific symbol, or affect other symbol flags which
4736 are then tested.
4737 Chain weakdefs so we can get from the weakdef back to an alias.
4738 The list is circular so that we don't need to use u.weakdef as
4739 well as this list to look at all aliases. */
4740 if (eind->elf.root.type != bfd_link_hash_indirect)
4741 {
4742 struct ppc_link_hash_entry *cur, *add, *next;
4743
4744 add = eind;
4745 do
4746 {
4747 cur = edir->weakref;
4748 if (cur != NULL)
4749 {
4750 do
4751 {
4752 /* We can be called twice for the same symbols.
4753 Don't make multiple loops. */
4754 if (cur == add)
4755 return;
4756 cur = cur->weakref;
4757 } while (cur != edir);
4758 }
4759 next = add->weakref;
4760 if (cur != add)
4761 {
4762 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4763 edir->weakref = add;
4764 }
4765 add = next;
4766 } while (add != NULL && add != eind);
4767 return;
4768 }
4769
4770 /* Copy over any dynamic relocs we may have on the indirect sym. */
4771 if (eind->dyn_relocs != NULL)
4772 {
4773 if (edir->dyn_relocs != NULL)
4774 {
4775 struct elf_dyn_relocs **pp;
4776 struct elf_dyn_relocs *p;
4777
4778 /* Add reloc counts against the indirect sym to the direct sym
4779 list. Merge any entries against the same section. */
4780 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4781 {
4782 struct elf_dyn_relocs *q;
4783
4784 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4785 if (q->sec == p->sec)
4786 {
4787 q->pc_count += p->pc_count;
4788 q->count += p->count;
4789 *pp = p->next;
4790 break;
4791 }
4792 if (q == NULL)
4793 pp = &p->next;
4794 }
4795 *pp = edir->dyn_relocs;
4796 }
4797
4798 edir->dyn_relocs = eind->dyn_relocs;
4799 eind->dyn_relocs = NULL;
4800 }
4801
4802 /* Copy over got entries that we may have already seen to the
4803 symbol which just became indirect. */
4804 if (eind->elf.got.glist != NULL)
4805 {
4806 if (edir->elf.got.glist != NULL)
4807 {
4808 struct got_entry **entp;
4809 struct got_entry *ent;
4810
4811 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4812 {
4813 struct got_entry *dent;
4814
4815 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4816 if (dent->addend == ent->addend
4817 && dent->owner == ent->owner
4818 && dent->tls_type == ent->tls_type)
4819 {
4820 dent->got.refcount += ent->got.refcount;
4821 *entp = ent->next;
4822 break;
4823 }
4824 if (dent == NULL)
4825 entp = &ent->next;
4826 }
4827 *entp = edir->elf.got.glist;
4828 }
4829
4830 edir->elf.got.glist = eind->elf.got.glist;
4831 eind->elf.got.glist = NULL;
4832 }
4833
4834 /* And plt entries. */
4835 move_plt_plist (eind, edir);
4836
4837 if (eind->elf.dynindx != -1)
4838 {
4839 if (edir->elf.dynindx != -1)
4840 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4841 edir->elf.dynstr_index);
4842 edir->elf.dynindx = eind->elf.dynindx;
4843 edir->elf.dynstr_index = eind->elf.dynstr_index;
4844 eind->elf.dynindx = -1;
4845 eind->elf.dynstr_index = 0;
4846 }
4847 }
4848
4849 /* Find the function descriptor hash entry from the given function code
4850 hash entry FH. Link the entries via their OH fields. */
4851
4852 static struct ppc_link_hash_entry *
4853 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4854 {
4855 struct ppc_link_hash_entry *fdh = fh->oh;
4856
4857 if (fdh == NULL)
4858 {
4859 const char *fd_name = fh->elf.root.root.string + 1;
4860
4861 fdh = (struct ppc_link_hash_entry *)
4862 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4863 if (fdh == NULL)
4864 return fdh;
4865
4866 fdh->is_func_descriptor = 1;
4867 fdh->oh = fh;
4868 fh->is_func = 1;
4869 fh->oh = fdh;
4870 }
4871
4872 fdh = ppc_follow_link (fdh);
4873 fdh->is_func_descriptor = 1;
4874 fdh->oh = fh;
4875 return fdh;
4876 }
4877
4878 /* Make a fake function descriptor sym for the undefined code sym FH. */
4879
4880 static struct ppc_link_hash_entry *
4881 make_fdh (struct bfd_link_info *info,
4882 struct ppc_link_hash_entry *fh)
4883 {
4884 bfd *abfd = fh->elf.root.u.undef.abfd;
4885 struct bfd_link_hash_entry *bh = NULL;
4886 struct ppc_link_hash_entry *fdh;
4887 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4888 ? BSF_WEAK
4889 : BSF_GLOBAL);
4890
4891 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4892 fh->elf.root.root.string + 1,
4893 flags, bfd_und_section_ptr, 0,
4894 NULL, FALSE, FALSE, &bh))
4895 return NULL;
4896
4897 fdh = (struct ppc_link_hash_entry *) bh;
4898 fdh->elf.non_elf = 0;
4899 fdh->fake = 1;
4900 fdh->is_func_descriptor = 1;
4901 fdh->oh = fh;
4902 fh->is_func = 1;
4903 fh->oh = fdh;
4904 return fdh;
4905 }
4906
4907 /* Fix function descriptor symbols defined in .opd sections to be
4908 function type. */
4909
4910 static bfd_boolean
4911 ppc64_elf_add_symbol_hook (bfd *ibfd,
4912 struct bfd_link_info *info,
4913 Elf_Internal_Sym *isym,
4914 const char **name,
4915 flagword *flags ATTRIBUTE_UNUSED,
4916 asection **sec,
4917 bfd_vma *value)
4918 {
4919 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4920 && (ibfd->flags & DYNAMIC) == 0
4921 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4922 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4923
4924 if (*sec != NULL
4925 && strcmp ((*sec)->name, ".opd") == 0)
4926 {
4927 asection *code_sec;
4928
4929 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4930 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4931 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4932
4933 /* If the symbol is a function defined in .opd, and the function
4934 code is in a discarded group, let it appear to be undefined. */
4935 if (!bfd_link_relocatable (info)
4936 && (*sec)->reloc_count != 0
4937 && opd_entry_value (*sec, *value, &code_sec, NULL,
4938 FALSE) != (bfd_vma) -1
4939 && discarded_section (code_sec))
4940 {
4941 *sec = bfd_und_section_ptr;
4942 isym->st_shndx = SHN_UNDEF;
4943 }
4944 }
4945 else if (*sec != NULL
4946 && strcmp ((*sec)->name, ".toc") == 0
4947 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4948 {
4949 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4950 if (htab != NULL)
4951 htab->params->object_in_toc = 1;
4952 }
4953
4954 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4955 {
4956 if (abiversion (ibfd) == 0)
4957 set_abiversion (ibfd, 2);
4958 else if (abiversion (ibfd) == 1)
4959 {
4960 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4961 " for ABI version 1\n"), name);
4962 bfd_set_error (bfd_error_bad_value);
4963 return FALSE;
4964 }
4965 }
4966
4967 return TRUE;
4968 }
4969
4970 /* Merge non-visibility st_other attributes: local entry point. */
4971
4972 static void
4973 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4974 const Elf_Internal_Sym *isym,
4975 bfd_boolean definition,
4976 bfd_boolean dynamic)
4977 {
4978 if (definition && !dynamic)
4979 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4980 | ELF_ST_VISIBILITY (h->other));
4981 }
4982
4983 /* Hook called on merging a symbol. We use this to clear "fake" since
4984 we now have a real symbol. */
4985
4986 static bfd_boolean
4987 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
4988 const Elf_Internal_Sym *isym ATTRIBUTE_UNUSED,
4989 asection **psec ATTRIBUTE_UNUSED,
4990 bfd_boolean newdef ATTRIBUTE_UNUSED,
4991 bfd_boolean olddef ATTRIBUTE_UNUSED,
4992 bfd *oldbfd ATTRIBUTE_UNUSED,
4993 const asection *oldsec ATTRIBUTE_UNUSED)
4994 {
4995 ((struct ppc_link_hash_entry *) h)->fake = 0;
4996 return TRUE;
4997 }
4998
4999 /* This function makes an old ABI object reference to ".bar" cause the
5000 inclusion of a new ABI object archive that defines "bar".
5001 NAME is a symbol defined in an archive. Return a symbol in the hash
5002 table that might be satisfied by the archive symbols. */
5003
5004 static struct elf_link_hash_entry *
5005 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5006 struct bfd_link_info *info,
5007 const char *name)
5008 {
5009 struct elf_link_hash_entry *h;
5010 char *dot_name;
5011 size_t len;
5012
5013 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5014 if (h != NULL
5015 /* Don't return this sym if it is a fake function descriptor
5016 created by add_symbol_adjust. */
5017 && !((struct ppc_link_hash_entry *) h)->fake)
5018 return h;
5019
5020 if (name[0] == '.')
5021 return h;
5022
5023 len = strlen (name);
5024 dot_name = bfd_alloc (abfd, len + 2);
5025 if (dot_name == NULL)
5026 return (struct elf_link_hash_entry *) 0 - 1;
5027 dot_name[0] = '.';
5028 memcpy (dot_name + 1, name, len + 1);
5029 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5030 bfd_release (abfd, dot_name);
5031 return h;
5032 }
5033
5034 /* This function satisfies all old ABI object references to ".bar" if a
5035 new ABI object defines "bar". Well, at least, undefined dot symbols
5036 are made weak. This stops later archive searches from including an
5037 object if we already have a function descriptor definition. It also
5038 prevents the linker complaining about undefined symbols.
5039 We also check and correct mismatched symbol visibility here. The
5040 most restrictive visibility of the function descriptor and the
5041 function entry symbol is used. */
5042
5043 static bfd_boolean
5044 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5045 {
5046 struct ppc_link_hash_table *htab;
5047 struct ppc_link_hash_entry *fdh;
5048
5049 if (eh->elf.root.type == bfd_link_hash_warning)
5050 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5051
5052 if (eh->elf.root.type == bfd_link_hash_indirect)
5053 return TRUE;
5054
5055 if (eh->elf.root.root.string[0] != '.')
5056 abort ();
5057
5058 htab = ppc_hash_table (info);
5059 if (htab == NULL)
5060 return FALSE;
5061
5062 fdh = lookup_fdh (eh, htab);
5063 if (fdh == NULL
5064 && !bfd_link_relocatable (info)
5065 && (eh->elf.root.type == bfd_link_hash_undefined
5066 || eh->elf.root.type == bfd_link_hash_undefweak)
5067 && eh->elf.ref_regular)
5068 {
5069 /* Make an undefined function descriptor sym, in order to
5070 pull in an --as-needed shared lib. Archives are handled
5071 elsewhere. */
5072 fdh = make_fdh (info, eh);
5073 if (fdh == NULL)
5074 return FALSE;
5075 }
5076
5077 if (fdh != NULL)
5078 {
5079 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5080 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5081
5082 /* Make both descriptor and entry symbol have the most
5083 constraining visibility of either symbol. */
5084 if (entry_vis < descr_vis)
5085 fdh->elf.other += entry_vis - descr_vis;
5086 else if (entry_vis > descr_vis)
5087 eh->elf.other += descr_vis - entry_vis;
5088
5089 /* Propagate reference flags from entry symbol to function
5090 descriptor symbol. */
5091 fdh->elf.root.non_ir_ref |= eh->elf.root.non_ir_ref;
5092 fdh->elf.ref_regular |= eh->elf.ref_regular;
5093 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5094
5095 if (!fdh->elf.forced_local
5096 && fdh->elf.dynindx == -1
5097 && fdh->elf.versioned != versioned_hidden
5098 && (bfd_link_dll (info)
5099 || fdh->elf.def_dynamic
5100 || fdh->elf.ref_dynamic)
5101 && (eh->elf.ref_regular
5102 || eh->elf.def_regular))
5103 {
5104 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5105 return FALSE;
5106 }
5107 }
5108
5109 return TRUE;
5110 }
5111
5112 /* Set up opd section info and abiversion for IBFD, and process list
5113 of dot-symbols we made in link_hash_newfunc. */
5114
5115 static bfd_boolean
5116 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5117 {
5118 struct ppc_link_hash_table *htab;
5119 struct ppc_link_hash_entry **p, *eh;
5120 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5121
5122 if (opd != NULL && opd->size != 0)
5123 {
5124 if (abiversion (ibfd) == 0)
5125 set_abiversion (ibfd, 1);
5126 else if (abiversion (ibfd) >= 2)
5127 {
5128 /* xgettext:c-format */
5129 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5130 " version %d\n"),
5131 ibfd, abiversion (ibfd));
5132 bfd_set_error (bfd_error_bad_value);
5133 return FALSE;
5134 }
5135
5136 if ((ibfd->flags & DYNAMIC) == 0
5137 && (opd->flags & SEC_RELOC) != 0
5138 && opd->reloc_count != 0
5139 && !bfd_is_abs_section (opd->output_section))
5140 {
5141 /* Garbage collection needs some extra help with .opd sections.
5142 We don't want to necessarily keep everything referenced by
5143 relocs in .opd, as that would keep all functions. Instead,
5144 if we reference an .opd symbol (a function descriptor), we
5145 want to keep the function code symbol's section. This is
5146 easy for global symbols, but for local syms we need to keep
5147 information about the associated function section. */
5148 bfd_size_type amt;
5149 asection **opd_sym_map;
5150
5151 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5152 opd_sym_map = bfd_zalloc (ibfd, amt);
5153 if (opd_sym_map == NULL)
5154 return FALSE;
5155 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5156 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5157 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5158 }
5159 }
5160
5161 if (!is_ppc64_elf (info->output_bfd))
5162 return TRUE;
5163 htab = ppc_hash_table (info);
5164 if (htab == NULL)
5165 return FALSE;
5166
5167 /* For input files without an explicit abiversion in e_flags
5168 we should have flagged any with symbol st_other bits set
5169 as ELFv1 and above flagged those with .opd as ELFv2.
5170 Set the output abiversion if not yet set, and for any input
5171 still ambiguous, take its abiversion from the output.
5172 Differences in ABI are reported later. */
5173 if (abiversion (info->output_bfd) == 0)
5174 set_abiversion (info->output_bfd, abiversion (ibfd));
5175 else if (abiversion (ibfd) == 0)
5176 set_abiversion (ibfd, abiversion (info->output_bfd));
5177
5178 p = &htab->dot_syms;
5179 while ((eh = *p) != NULL)
5180 {
5181 *p = NULL;
5182 if (&eh->elf == htab->elf.hgot)
5183 ;
5184 else if (htab->elf.hgot == NULL
5185 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5186 htab->elf.hgot = &eh->elf;
5187 else if (abiversion (ibfd) <= 1)
5188 {
5189 htab->need_func_desc_adj = 1;
5190 if (!add_symbol_adjust (eh, info))
5191 return FALSE;
5192 }
5193 p = &eh->u.next_dot_sym;
5194 }
5195 return TRUE;
5196 }
5197
5198 /* Undo hash table changes when an --as-needed input file is determined
5199 not to be needed. */
5200
5201 static bfd_boolean
5202 ppc64_elf_notice_as_needed (bfd *ibfd,
5203 struct bfd_link_info *info,
5204 enum notice_asneeded_action act)
5205 {
5206 if (act == notice_not_needed)
5207 {
5208 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5209
5210 if (htab == NULL)
5211 return FALSE;
5212
5213 htab->dot_syms = NULL;
5214 }
5215 return _bfd_elf_notice_as_needed (ibfd, info, act);
5216 }
5217
5218 /* If --just-symbols against a final linked binary, then assume we need
5219 toc adjusting stubs when calling functions defined there. */
5220
5221 static void
5222 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5223 {
5224 if ((sec->flags & SEC_CODE) != 0
5225 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5226 && is_ppc64_elf (sec->owner))
5227 {
5228 if (abiversion (sec->owner) >= 2
5229 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5230 sec->has_toc_reloc = 1;
5231 }
5232 _bfd_elf_link_just_syms (sec, info);
5233 }
5234
5235 static struct plt_entry **
5236 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5237 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5238 {
5239 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5240 struct plt_entry **local_plt;
5241 unsigned char *local_got_tls_masks;
5242
5243 if (local_got_ents == NULL)
5244 {
5245 bfd_size_type size = symtab_hdr->sh_info;
5246
5247 size *= (sizeof (*local_got_ents)
5248 + sizeof (*local_plt)
5249 + sizeof (*local_got_tls_masks));
5250 local_got_ents = bfd_zalloc (abfd, size);
5251 if (local_got_ents == NULL)
5252 return NULL;
5253 elf_local_got_ents (abfd) = local_got_ents;
5254 }
5255
5256 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5257 {
5258 struct got_entry *ent;
5259
5260 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5261 if (ent->addend == r_addend
5262 && ent->owner == abfd
5263 && ent->tls_type == tls_type)
5264 break;
5265 if (ent == NULL)
5266 {
5267 bfd_size_type amt = sizeof (*ent);
5268 ent = bfd_alloc (abfd, amt);
5269 if (ent == NULL)
5270 return FALSE;
5271 ent->next = local_got_ents[r_symndx];
5272 ent->addend = r_addend;
5273 ent->owner = abfd;
5274 ent->tls_type = tls_type;
5275 ent->is_indirect = FALSE;
5276 ent->got.refcount = 0;
5277 local_got_ents[r_symndx] = ent;
5278 }
5279 ent->got.refcount += 1;
5280 }
5281
5282 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5283 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5284 local_got_tls_masks[r_symndx] |= tls_type;
5285
5286 return local_plt + r_symndx;
5287 }
5288
5289 static bfd_boolean
5290 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5291 {
5292 struct plt_entry *ent;
5293
5294 for (ent = *plist; ent != NULL; ent = ent->next)
5295 if (ent->addend == addend)
5296 break;
5297 if (ent == NULL)
5298 {
5299 bfd_size_type amt = sizeof (*ent);
5300 ent = bfd_alloc (abfd, amt);
5301 if (ent == NULL)
5302 return FALSE;
5303 ent->next = *plist;
5304 ent->addend = addend;
5305 ent->plt.refcount = 0;
5306 *plist = ent;
5307 }
5308 ent->plt.refcount += 1;
5309 return TRUE;
5310 }
5311
5312 static bfd_boolean
5313 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5314 {
5315 return (r_type == R_PPC64_REL24
5316 || r_type == R_PPC64_REL14
5317 || r_type == R_PPC64_REL14_BRTAKEN
5318 || r_type == R_PPC64_REL14_BRNTAKEN
5319 || r_type == R_PPC64_ADDR24
5320 || r_type == R_PPC64_ADDR14
5321 || r_type == R_PPC64_ADDR14_BRTAKEN
5322 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5323 }
5324
5325 /* Look through the relocs for a section during the first phase, and
5326 calculate needed space in the global offset table, procedure
5327 linkage table, and dynamic reloc sections. */
5328
5329 static bfd_boolean
5330 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5331 asection *sec, const Elf_Internal_Rela *relocs)
5332 {
5333 struct ppc_link_hash_table *htab;
5334 Elf_Internal_Shdr *symtab_hdr;
5335 struct elf_link_hash_entry **sym_hashes;
5336 const Elf_Internal_Rela *rel;
5337 const Elf_Internal_Rela *rel_end;
5338 asection *sreloc;
5339 asection **opd_sym_map;
5340 struct elf_link_hash_entry *tga, *dottga;
5341
5342 if (bfd_link_relocatable (info))
5343 return TRUE;
5344
5345 /* Don't do anything special with non-loaded, non-alloced sections.
5346 In particular, any relocs in such sections should not affect GOT
5347 and PLT reference counting (ie. we don't allow them to create GOT
5348 or PLT entries), there's no possibility or desire to optimize TLS
5349 relocs, and there's not much point in propagating relocs to shared
5350 libs that the dynamic linker won't relocate. */
5351 if ((sec->flags & SEC_ALLOC) == 0)
5352 return TRUE;
5353
5354 BFD_ASSERT (is_ppc64_elf (abfd));
5355
5356 htab = ppc_hash_table (info);
5357 if (htab == NULL)
5358 return FALSE;
5359
5360 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5361 FALSE, FALSE, TRUE);
5362 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5363 FALSE, FALSE, TRUE);
5364 symtab_hdr = &elf_symtab_hdr (abfd);
5365 sym_hashes = elf_sym_hashes (abfd);
5366 sreloc = NULL;
5367 opd_sym_map = NULL;
5368 if (ppc64_elf_section_data (sec) != NULL
5369 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5370 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5371
5372 rel_end = relocs + sec->reloc_count;
5373 for (rel = relocs; rel < rel_end; rel++)
5374 {
5375 unsigned long r_symndx;
5376 struct elf_link_hash_entry *h;
5377 enum elf_ppc64_reloc_type r_type;
5378 int tls_type;
5379 struct _ppc64_elf_section_data *ppc64_sec;
5380 struct plt_entry **ifunc, **plt_list;
5381
5382 r_symndx = ELF64_R_SYM (rel->r_info);
5383 if (r_symndx < symtab_hdr->sh_info)
5384 h = NULL;
5385 else
5386 {
5387 struct ppc_link_hash_entry *eh;
5388
5389 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5390 h = elf_follow_link (h);
5391 eh = (struct ppc_link_hash_entry *) h;
5392
5393 /* PR15323, ref flags aren't set for references in the same
5394 object. */
5395 h->root.non_ir_ref = 1;
5396 if (eh->is_func && eh->oh != NULL)
5397 eh->oh->elf.root.non_ir_ref = 1;
5398
5399 if (h == htab->elf.hgot)
5400 sec->has_toc_reloc = 1;
5401 }
5402
5403 tls_type = 0;
5404 ifunc = NULL;
5405 if (h != NULL)
5406 {
5407 if (h->type == STT_GNU_IFUNC)
5408 {
5409 h->needs_plt = 1;
5410 ifunc = &h->plt.plist;
5411 }
5412 }
5413 else
5414 {
5415 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5416 abfd, r_symndx);
5417 if (isym == NULL)
5418 return FALSE;
5419
5420 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5421 {
5422 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5423 rel->r_addend, PLT_IFUNC);
5424 if (ifunc == NULL)
5425 return FALSE;
5426 }
5427 }
5428
5429 r_type = ELF64_R_TYPE (rel->r_info);
5430 switch (r_type)
5431 {
5432 case R_PPC64_TLSGD:
5433 case R_PPC64_TLSLD:
5434 /* These special tls relocs tie a call to __tls_get_addr with
5435 its parameter symbol. */
5436 break;
5437
5438 case R_PPC64_GOT_TLSLD16:
5439 case R_PPC64_GOT_TLSLD16_LO:
5440 case R_PPC64_GOT_TLSLD16_HI:
5441 case R_PPC64_GOT_TLSLD16_HA:
5442 tls_type = TLS_TLS | TLS_LD;
5443 goto dogottls;
5444
5445 case R_PPC64_GOT_TLSGD16:
5446 case R_PPC64_GOT_TLSGD16_LO:
5447 case R_PPC64_GOT_TLSGD16_HI:
5448 case R_PPC64_GOT_TLSGD16_HA:
5449 tls_type = TLS_TLS | TLS_GD;
5450 goto dogottls;
5451
5452 case R_PPC64_GOT_TPREL16_DS:
5453 case R_PPC64_GOT_TPREL16_LO_DS:
5454 case R_PPC64_GOT_TPREL16_HI:
5455 case R_PPC64_GOT_TPREL16_HA:
5456 if (bfd_link_pic (info))
5457 info->flags |= DF_STATIC_TLS;
5458 tls_type = TLS_TLS | TLS_TPREL;
5459 goto dogottls;
5460
5461 case R_PPC64_GOT_DTPREL16_DS:
5462 case R_PPC64_GOT_DTPREL16_LO_DS:
5463 case R_PPC64_GOT_DTPREL16_HI:
5464 case R_PPC64_GOT_DTPREL16_HA:
5465 tls_type = TLS_TLS | TLS_DTPREL;
5466 dogottls:
5467 sec->has_tls_reloc = 1;
5468 /* Fall through */
5469
5470 case R_PPC64_GOT16:
5471 case R_PPC64_GOT16_DS:
5472 case R_PPC64_GOT16_HA:
5473 case R_PPC64_GOT16_HI:
5474 case R_PPC64_GOT16_LO:
5475 case R_PPC64_GOT16_LO_DS:
5476 /* This symbol requires a global offset table entry. */
5477 sec->has_toc_reloc = 1;
5478 if (r_type == R_PPC64_GOT_TLSLD16
5479 || r_type == R_PPC64_GOT_TLSGD16
5480 || r_type == R_PPC64_GOT_TPREL16_DS
5481 || r_type == R_PPC64_GOT_DTPREL16_DS
5482 || r_type == R_PPC64_GOT16
5483 || r_type == R_PPC64_GOT16_DS)
5484 {
5485 htab->do_multi_toc = 1;
5486 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5487 }
5488
5489 if (ppc64_elf_tdata (abfd)->got == NULL
5490 && !create_got_section (abfd, info))
5491 return FALSE;
5492
5493 if (h != NULL)
5494 {
5495 struct ppc_link_hash_entry *eh;
5496 struct got_entry *ent;
5497
5498 eh = (struct ppc_link_hash_entry *) h;
5499 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5500 if (ent->addend == rel->r_addend
5501 && ent->owner == abfd
5502 && ent->tls_type == tls_type)
5503 break;
5504 if (ent == NULL)
5505 {
5506 bfd_size_type amt = sizeof (*ent);
5507 ent = bfd_alloc (abfd, amt);
5508 if (ent == NULL)
5509 return FALSE;
5510 ent->next = eh->elf.got.glist;
5511 ent->addend = rel->r_addend;
5512 ent->owner = abfd;
5513 ent->tls_type = tls_type;
5514 ent->is_indirect = FALSE;
5515 ent->got.refcount = 0;
5516 eh->elf.got.glist = ent;
5517 }
5518 ent->got.refcount += 1;
5519 eh->tls_mask |= tls_type;
5520 }
5521 else
5522 /* This is a global offset table entry for a local symbol. */
5523 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5524 rel->r_addend, tls_type))
5525 return FALSE;
5526
5527 /* We may also need a plt entry if the symbol turns out to be
5528 an ifunc. */
5529 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5530 {
5531 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5532 return FALSE;
5533 }
5534 break;
5535
5536 case R_PPC64_PLT16_HA:
5537 case R_PPC64_PLT16_HI:
5538 case R_PPC64_PLT16_LO:
5539 case R_PPC64_PLT32:
5540 case R_PPC64_PLT64:
5541 /* This symbol requires a procedure linkage table entry. */
5542 plt_list = ifunc;
5543 if (h != NULL)
5544 {
5545 h->needs_plt = 1;
5546 if (h->root.root.string[0] == '.'
5547 && h->root.root.string[1] != '\0')
5548 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5549 plt_list = &h->plt.plist;
5550 }
5551 if (plt_list == NULL)
5552 {
5553 /* It does not make sense to have a procedure linkage
5554 table entry for a non-ifunc local symbol. */
5555 info->callbacks->einfo
5556 /* xgettext:c-format */
5557 (_("%H: %s reloc against local symbol\n"),
5558 abfd, sec, rel->r_offset,
5559 ppc64_elf_howto_table[r_type]->name);
5560 bfd_set_error (bfd_error_bad_value);
5561 return FALSE;
5562 }
5563 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5564 return FALSE;
5565 break;
5566
5567 /* The following relocations don't need to propagate the
5568 relocation if linking a shared object since they are
5569 section relative. */
5570 case R_PPC64_SECTOFF:
5571 case R_PPC64_SECTOFF_LO:
5572 case R_PPC64_SECTOFF_HI:
5573 case R_PPC64_SECTOFF_HA:
5574 case R_PPC64_SECTOFF_DS:
5575 case R_PPC64_SECTOFF_LO_DS:
5576 case R_PPC64_DTPREL16:
5577 case R_PPC64_DTPREL16_LO:
5578 case R_PPC64_DTPREL16_HI:
5579 case R_PPC64_DTPREL16_HA:
5580 case R_PPC64_DTPREL16_DS:
5581 case R_PPC64_DTPREL16_LO_DS:
5582 case R_PPC64_DTPREL16_HIGH:
5583 case R_PPC64_DTPREL16_HIGHA:
5584 case R_PPC64_DTPREL16_HIGHER:
5585 case R_PPC64_DTPREL16_HIGHERA:
5586 case R_PPC64_DTPREL16_HIGHEST:
5587 case R_PPC64_DTPREL16_HIGHESTA:
5588 break;
5589
5590 /* Nor do these. */
5591 case R_PPC64_REL16:
5592 case R_PPC64_REL16_LO:
5593 case R_PPC64_REL16_HI:
5594 case R_PPC64_REL16_HA:
5595 case R_PPC64_REL16DX_HA:
5596 break;
5597
5598 /* Not supported as a dynamic relocation. */
5599 case R_PPC64_ADDR64_LOCAL:
5600 if (bfd_link_pic (info))
5601 {
5602 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5603 ppc_howto_init ();
5604 /* xgettext:c-format */
5605 info->callbacks->einfo (_("%H: %s reloc unsupported "
5606 "in shared libraries and PIEs.\n"),
5607 abfd, sec, rel->r_offset,
5608 ppc64_elf_howto_table[r_type]->name);
5609 bfd_set_error (bfd_error_bad_value);
5610 return FALSE;
5611 }
5612 break;
5613
5614 case R_PPC64_TOC16:
5615 case R_PPC64_TOC16_DS:
5616 htab->do_multi_toc = 1;
5617 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5618 /* Fall through. */
5619 case R_PPC64_TOC16_LO:
5620 case R_PPC64_TOC16_HI:
5621 case R_PPC64_TOC16_HA:
5622 case R_PPC64_TOC16_LO_DS:
5623 sec->has_toc_reloc = 1;
5624 break;
5625
5626 /* Marker reloc. */
5627 case R_PPC64_ENTRY:
5628 break;
5629
5630 /* This relocation describes the C++ object vtable hierarchy.
5631 Reconstruct it for later use during GC. */
5632 case R_PPC64_GNU_VTINHERIT:
5633 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5634 return FALSE;
5635 break;
5636
5637 /* This relocation describes which C++ vtable entries are actually
5638 used. Record for later use during GC. */
5639 case R_PPC64_GNU_VTENTRY:
5640 BFD_ASSERT (h != NULL);
5641 if (h != NULL
5642 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5643 return FALSE;
5644 break;
5645
5646 case R_PPC64_REL14:
5647 case R_PPC64_REL14_BRTAKEN:
5648 case R_PPC64_REL14_BRNTAKEN:
5649 {
5650 asection *dest = NULL;
5651
5652 /* Heuristic: If jumping outside our section, chances are
5653 we are going to need a stub. */
5654 if (h != NULL)
5655 {
5656 /* If the sym is weak it may be overridden later, so
5657 don't assume we know where a weak sym lives. */
5658 if (h->root.type == bfd_link_hash_defined)
5659 dest = h->root.u.def.section;
5660 }
5661 else
5662 {
5663 Elf_Internal_Sym *isym;
5664
5665 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5666 abfd, r_symndx);
5667 if (isym == NULL)
5668 return FALSE;
5669
5670 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5671 }
5672
5673 if (dest != sec)
5674 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5675 }
5676 /* Fall through. */
5677
5678 case R_PPC64_REL24:
5679 plt_list = ifunc;
5680 if (h != NULL)
5681 {
5682 h->needs_plt = 1;
5683 if (h->root.root.string[0] == '.'
5684 && h->root.root.string[1] != '\0')
5685 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5686
5687 if (h == tga || h == dottga)
5688 {
5689 sec->has_tls_reloc = 1;
5690 if (rel != relocs
5691 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5692 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5693 /* We have a new-style __tls_get_addr call with
5694 a marker reloc. */
5695 ;
5696 else
5697 /* Mark this section as having an old-style call. */
5698 sec->has_tls_get_addr_call = 1;
5699 }
5700 plt_list = &h->plt.plist;
5701 }
5702
5703 /* We may need a .plt entry if the function this reloc
5704 refers to is in a shared lib. */
5705 if (plt_list
5706 && !update_plt_info (abfd, plt_list, rel->r_addend))
5707 return FALSE;
5708 break;
5709
5710 case R_PPC64_ADDR14:
5711 case R_PPC64_ADDR14_BRNTAKEN:
5712 case R_PPC64_ADDR14_BRTAKEN:
5713 case R_PPC64_ADDR24:
5714 goto dodyn;
5715
5716 case R_PPC64_TPREL64:
5717 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5718 if (bfd_link_pic (info))
5719 info->flags |= DF_STATIC_TLS;
5720 goto dotlstoc;
5721
5722 case R_PPC64_DTPMOD64:
5723 if (rel + 1 < rel_end
5724 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5725 && rel[1].r_offset == rel->r_offset + 8)
5726 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5727 else
5728 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5729 goto dotlstoc;
5730
5731 case R_PPC64_DTPREL64:
5732 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5733 if (rel != relocs
5734 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5735 && rel[-1].r_offset == rel->r_offset - 8)
5736 /* This is the second reloc of a dtpmod, dtprel pair.
5737 Don't mark with TLS_DTPREL. */
5738 goto dodyn;
5739
5740 dotlstoc:
5741 sec->has_tls_reloc = 1;
5742 if (h != NULL)
5743 {
5744 struct ppc_link_hash_entry *eh;
5745 eh = (struct ppc_link_hash_entry *) h;
5746 eh->tls_mask |= tls_type;
5747 }
5748 else
5749 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5750 rel->r_addend, tls_type))
5751 return FALSE;
5752
5753 ppc64_sec = ppc64_elf_section_data (sec);
5754 if (ppc64_sec->sec_type != sec_toc)
5755 {
5756 bfd_size_type amt;
5757
5758 /* One extra to simplify get_tls_mask. */
5759 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5760 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5761 if (ppc64_sec->u.toc.symndx == NULL)
5762 return FALSE;
5763 amt = sec->size * sizeof (bfd_vma) / 8;
5764 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5765 if (ppc64_sec->u.toc.add == NULL)
5766 return FALSE;
5767 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5768 ppc64_sec->sec_type = sec_toc;
5769 }
5770 BFD_ASSERT (rel->r_offset % 8 == 0);
5771 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5772 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5773
5774 /* Mark the second slot of a GD or LD entry.
5775 -1 to indicate GD and -2 to indicate LD. */
5776 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5777 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5778 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5779 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5780 goto dodyn;
5781
5782 case R_PPC64_TPREL16:
5783 case R_PPC64_TPREL16_LO:
5784 case R_PPC64_TPREL16_HI:
5785 case R_PPC64_TPREL16_HA:
5786 case R_PPC64_TPREL16_DS:
5787 case R_PPC64_TPREL16_LO_DS:
5788 case R_PPC64_TPREL16_HIGH:
5789 case R_PPC64_TPREL16_HIGHA:
5790 case R_PPC64_TPREL16_HIGHER:
5791 case R_PPC64_TPREL16_HIGHERA:
5792 case R_PPC64_TPREL16_HIGHEST:
5793 case R_PPC64_TPREL16_HIGHESTA:
5794 if (bfd_link_pic (info))
5795 {
5796 info->flags |= DF_STATIC_TLS;
5797 goto dodyn;
5798 }
5799 break;
5800
5801 case R_PPC64_ADDR64:
5802 if (opd_sym_map != NULL
5803 && rel + 1 < rel_end
5804 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5805 {
5806 if (h != NULL)
5807 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5808 else
5809 {
5810 asection *s;
5811 Elf_Internal_Sym *isym;
5812
5813 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5814 abfd, r_symndx);
5815 if (isym == NULL)
5816 return FALSE;
5817
5818 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5819 if (s != NULL && s != sec)
5820 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5821 }
5822 }
5823 /* Fall through. */
5824
5825 case R_PPC64_ADDR16:
5826 case R_PPC64_ADDR16_DS:
5827 case R_PPC64_ADDR16_HA:
5828 case R_PPC64_ADDR16_HI:
5829 case R_PPC64_ADDR16_HIGH:
5830 case R_PPC64_ADDR16_HIGHA:
5831 case R_PPC64_ADDR16_HIGHER:
5832 case R_PPC64_ADDR16_HIGHERA:
5833 case R_PPC64_ADDR16_HIGHEST:
5834 case R_PPC64_ADDR16_HIGHESTA:
5835 case R_PPC64_ADDR16_LO:
5836 case R_PPC64_ADDR16_LO_DS:
5837 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5838 && rel->r_addend == 0)
5839 {
5840 /* We may need a .plt entry if this reloc refers to a
5841 function in a shared lib. */
5842 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5843 return FALSE;
5844 h->pointer_equality_needed = 1;
5845 }
5846 /* Fall through. */
5847
5848 case R_PPC64_REL30:
5849 case R_PPC64_REL32:
5850 case R_PPC64_REL64:
5851 case R_PPC64_ADDR32:
5852 case R_PPC64_UADDR16:
5853 case R_PPC64_UADDR32:
5854 case R_PPC64_UADDR64:
5855 case R_PPC64_TOC:
5856 if (h != NULL && !bfd_link_pic (info))
5857 /* We may need a copy reloc. */
5858 h->non_got_ref = 1;
5859
5860 /* Don't propagate .opd relocs. */
5861 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5862 break;
5863
5864 /* If we are creating a shared library, and this is a reloc
5865 against a global symbol, or a non PC relative reloc
5866 against a local symbol, then we need to copy the reloc
5867 into the shared library. However, if we are linking with
5868 -Bsymbolic, we do not need to copy a reloc against a
5869 global symbol which is defined in an object we are
5870 including in the link (i.e., DEF_REGULAR is set). At
5871 this point we have not seen all the input files, so it is
5872 possible that DEF_REGULAR is not set now but will be set
5873 later (it is never cleared). In case of a weak definition,
5874 DEF_REGULAR may be cleared later by a strong definition in
5875 a shared library. We account for that possibility below by
5876 storing information in the dyn_relocs field of the hash
5877 table entry. A similar situation occurs when creating
5878 shared libraries and symbol visibility changes render the
5879 symbol local.
5880
5881 If on the other hand, we are creating an executable, we
5882 may need to keep relocations for symbols satisfied by a
5883 dynamic library if we manage to avoid copy relocs for the
5884 symbol. */
5885 dodyn:
5886 if ((bfd_link_pic (info)
5887 && (must_be_dyn_reloc (info, r_type)
5888 || (h != NULL
5889 && (!SYMBOLIC_BIND (info, h)
5890 || h->root.type == bfd_link_hash_defweak
5891 || !h->def_regular))))
5892 || (ELIMINATE_COPY_RELOCS
5893 && !bfd_link_pic (info)
5894 && h != NULL
5895 && (h->root.type == bfd_link_hash_defweak
5896 || !h->def_regular))
5897 || (!bfd_link_pic (info)
5898 && ifunc != NULL))
5899 {
5900 /* We must copy these reloc types into the output file.
5901 Create a reloc section in dynobj and make room for
5902 this reloc. */
5903 if (sreloc == NULL)
5904 {
5905 sreloc = _bfd_elf_make_dynamic_reloc_section
5906 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5907
5908 if (sreloc == NULL)
5909 return FALSE;
5910 }
5911
5912 /* If this is a global symbol, we count the number of
5913 relocations we need for this symbol. */
5914 if (h != NULL)
5915 {
5916 struct elf_dyn_relocs *p;
5917 struct elf_dyn_relocs **head;
5918
5919 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5920 p = *head;
5921 if (p == NULL || p->sec != sec)
5922 {
5923 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5924 if (p == NULL)
5925 return FALSE;
5926 p->next = *head;
5927 *head = p;
5928 p->sec = sec;
5929 p->count = 0;
5930 p->pc_count = 0;
5931 }
5932 p->count += 1;
5933 if (!must_be_dyn_reloc (info, r_type))
5934 p->pc_count += 1;
5935 }
5936 else
5937 {
5938 /* Track dynamic relocs needed for local syms too.
5939 We really need local syms available to do this
5940 easily. Oh well. */
5941 struct ppc_dyn_relocs *p;
5942 struct ppc_dyn_relocs **head;
5943 bfd_boolean is_ifunc;
5944 asection *s;
5945 void *vpp;
5946 Elf_Internal_Sym *isym;
5947
5948 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5949 abfd, r_symndx);
5950 if (isym == NULL)
5951 return FALSE;
5952
5953 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5954 if (s == NULL)
5955 s = sec;
5956
5957 vpp = &elf_section_data (s)->local_dynrel;
5958 head = (struct ppc_dyn_relocs **) vpp;
5959 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5960 p = *head;
5961 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5962 p = p->next;
5963 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5964 {
5965 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5966 if (p == NULL)
5967 return FALSE;
5968 p->next = *head;
5969 *head = p;
5970 p->sec = sec;
5971 p->ifunc = is_ifunc;
5972 p->count = 0;
5973 }
5974 p->count += 1;
5975 }
5976 }
5977 break;
5978
5979 default:
5980 break;
5981 }
5982 }
5983
5984 return TRUE;
5985 }
5986
5987 /* Merge backend specific data from an object file to the output
5988 object file when linking. */
5989
5990 static bfd_boolean
5991 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
5992 {
5993 bfd *obfd = info->output_bfd;
5994 unsigned long iflags, oflags;
5995
5996 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5997 return TRUE;
5998
5999 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6000 return TRUE;
6001
6002 if (!_bfd_generic_verify_endian_match (ibfd, info))
6003 return FALSE;
6004
6005 iflags = elf_elfheader (ibfd)->e_flags;
6006 oflags = elf_elfheader (obfd)->e_flags;
6007
6008 if (iflags & ~EF_PPC64_ABI)
6009 {
6010 _bfd_error_handler
6011 /* xgettext:c-format */
6012 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6013 bfd_set_error (bfd_error_bad_value);
6014 return FALSE;
6015 }
6016 else if (iflags != oflags && iflags != 0)
6017 {
6018 _bfd_error_handler
6019 /* xgettext:c-format */
6020 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6021 ibfd, iflags, oflags);
6022 bfd_set_error (bfd_error_bad_value);
6023 return FALSE;
6024 }
6025
6026 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6027
6028 /* Merge Tag_compatibility attributes and any common GNU ones. */
6029 _bfd_elf_merge_object_attributes (ibfd, info);
6030
6031 return TRUE;
6032 }
6033
6034 static bfd_boolean
6035 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6036 {
6037 /* Print normal ELF private data. */
6038 _bfd_elf_print_private_bfd_data (abfd, ptr);
6039
6040 if (elf_elfheader (abfd)->e_flags != 0)
6041 {
6042 FILE *file = ptr;
6043
6044 fprintf (file, _("private flags = 0x%lx:"),
6045 elf_elfheader (abfd)->e_flags);
6046
6047 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6048 fprintf (file, _(" [abiv%ld]"),
6049 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6050 fputc ('\n', file);
6051 }
6052
6053 return TRUE;
6054 }
6055
6056 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6057 of the code entry point, and its section, which must be in the same
6058 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6059
6060 static bfd_vma
6061 opd_entry_value (asection *opd_sec,
6062 bfd_vma offset,
6063 asection **code_sec,
6064 bfd_vma *code_off,
6065 bfd_boolean in_code_sec)
6066 {
6067 bfd *opd_bfd = opd_sec->owner;
6068 Elf_Internal_Rela *relocs;
6069 Elf_Internal_Rela *lo, *hi, *look;
6070 bfd_vma val;
6071
6072 /* No relocs implies we are linking a --just-symbols object, or looking
6073 at a final linked executable with addr2line or somesuch. */
6074 if (opd_sec->reloc_count == 0)
6075 {
6076 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6077
6078 if (contents == NULL)
6079 {
6080 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6081 return (bfd_vma) -1;
6082 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6083 }
6084
6085 /* PR 17512: file: 64b9dfbb. */
6086 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6087 return (bfd_vma) -1;
6088
6089 val = bfd_get_64 (opd_bfd, contents + offset);
6090 if (code_sec != NULL)
6091 {
6092 asection *sec, *likely = NULL;
6093
6094 if (in_code_sec)
6095 {
6096 sec = *code_sec;
6097 if (sec->vma <= val
6098 && val < sec->vma + sec->size)
6099 likely = sec;
6100 else
6101 val = -1;
6102 }
6103 else
6104 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6105 if (sec->vma <= val
6106 && (sec->flags & SEC_LOAD) != 0
6107 && (sec->flags & SEC_ALLOC) != 0)
6108 likely = sec;
6109 if (likely != NULL)
6110 {
6111 *code_sec = likely;
6112 if (code_off != NULL)
6113 *code_off = val - likely->vma;
6114 }
6115 }
6116 return val;
6117 }
6118
6119 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6120
6121 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6122 if (relocs == NULL)
6123 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6124 /* PR 17512: file: df8e1fd6. */
6125 if (relocs == NULL)
6126 return (bfd_vma) -1;
6127
6128 /* Go find the opd reloc at the sym address. */
6129 lo = relocs;
6130 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6131 val = (bfd_vma) -1;
6132 while (lo < hi)
6133 {
6134 look = lo + (hi - lo) / 2;
6135 if (look->r_offset < offset)
6136 lo = look + 1;
6137 else if (look->r_offset > offset)
6138 hi = look;
6139 else
6140 {
6141 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6142
6143 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6144 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6145 {
6146 unsigned long symndx = ELF64_R_SYM (look->r_info);
6147 asection *sec = NULL;
6148
6149 if (symndx >= symtab_hdr->sh_info
6150 && elf_sym_hashes (opd_bfd) != NULL)
6151 {
6152 struct elf_link_hash_entry **sym_hashes;
6153 struct elf_link_hash_entry *rh;
6154
6155 sym_hashes = elf_sym_hashes (opd_bfd);
6156 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6157 if (rh != NULL)
6158 {
6159 rh = elf_follow_link (rh);
6160 if (rh->root.type != bfd_link_hash_defined
6161 && rh->root.type != bfd_link_hash_defweak)
6162 break;
6163 if (rh->root.u.def.section->owner == opd_bfd)
6164 {
6165 val = rh->root.u.def.value;
6166 sec = rh->root.u.def.section;
6167 }
6168 }
6169 }
6170
6171 if (sec == NULL)
6172 {
6173 Elf_Internal_Sym *sym;
6174
6175 if (symndx < symtab_hdr->sh_info)
6176 {
6177 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6178 if (sym == NULL)
6179 {
6180 size_t symcnt = symtab_hdr->sh_info;
6181 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6182 symcnt, 0,
6183 NULL, NULL, NULL);
6184 if (sym == NULL)
6185 break;
6186 symtab_hdr->contents = (bfd_byte *) sym;
6187 }
6188 sym += symndx;
6189 }
6190 else
6191 {
6192 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6193 1, symndx,
6194 NULL, NULL, NULL);
6195 if (sym == NULL)
6196 break;
6197 }
6198 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6199 if (sec == NULL)
6200 break;
6201 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6202 val = sym->st_value;
6203 }
6204
6205 val += look->r_addend;
6206 if (code_off != NULL)
6207 *code_off = val;
6208 if (code_sec != NULL)
6209 {
6210 if (in_code_sec && *code_sec != sec)
6211 return -1;
6212 else
6213 *code_sec = sec;
6214 }
6215 if (sec->output_section != NULL)
6216 val += sec->output_section->vma + sec->output_offset;
6217 }
6218 break;
6219 }
6220 }
6221
6222 return val;
6223 }
6224
6225 /* If the ELF symbol SYM might be a function in SEC, return the
6226 function size and set *CODE_OFF to the function's entry point,
6227 otherwise return zero. */
6228
6229 static bfd_size_type
6230 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6231 bfd_vma *code_off)
6232 {
6233 bfd_size_type size;
6234
6235 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6236 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6237 return 0;
6238
6239 size = 0;
6240 if (!(sym->flags & BSF_SYNTHETIC))
6241 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6242
6243 if (strcmp (sym->section->name, ".opd") == 0)
6244 {
6245 struct _opd_sec_data *opd = get_opd_info (sym->section);
6246 bfd_vma symval = sym->value;
6247
6248 if (opd != NULL
6249 && opd->adjust != NULL
6250 && elf_section_data (sym->section)->relocs != NULL)
6251 {
6252 /* opd_entry_value will use cached relocs that have been
6253 adjusted, but with raw symbols. That means both local
6254 and global symbols need adjusting. */
6255 long adjust = opd->adjust[OPD_NDX (symval)];
6256 if (adjust == -1)
6257 return 0;
6258 symval += adjust;
6259 }
6260
6261 if (opd_entry_value (sym->section, symval,
6262 &sec, code_off, TRUE) == (bfd_vma) -1)
6263 return 0;
6264 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6265 symbol. This size has nothing to do with the code size of the
6266 function, which is what we're supposed to return, but the
6267 code size isn't available without looking up the dot-sym.
6268 However, doing that would be a waste of time particularly
6269 since elf_find_function will look at the dot-sym anyway.
6270 Now, elf_find_function will keep the largest size of any
6271 function sym found at the code address of interest, so return
6272 1 here to avoid it incorrectly caching a larger function size
6273 for a small function. This does mean we return the wrong
6274 size for a new-ABI function of size 24, but all that does is
6275 disable caching for such functions. */
6276 if (size == 24)
6277 size = 1;
6278 }
6279 else
6280 {
6281 if (sym->section != sec)
6282 return 0;
6283 *code_off = sym->value;
6284 }
6285 if (size == 0)
6286 size = 1;
6287 return size;
6288 }
6289
6290 /* Return true if symbol is defined in a regular object file. */
6291
6292 static bfd_boolean
6293 is_static_defined (struct elf_link_hash_entry *h)
6294 {
6295 return ((h->root.type == bfd_link_hash_defined
6296 || h->root.type == bfd_link_hash_defweak)
6297 && h->root.u.def.section != NULL
6298 && h->root.u.def.section->output_section != NULL);
6299 }
6300
6301 /* If FDH is a function descriptor symbol, return the associated code
6302 entry symbol if it is defined. Return NULL otherwise. */
6303
6304 static struct ppc_link_hash_entry *
6305 defined_code_entry (struct ppc_link_hash_entry *fdh)
6306 {
6307 if (fdh->is_func_descriptor)
6308 {
6309 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6310 if (fh->elf.root.type == bfd_link_hash_defined
6311 || fh->elf.root.type == bfd_link_hash_defweak)
6312 return fh;
6313 }
6314 return NULL;
6315 }
6316
6317 /* If FH is a function code entry symbol, return the associated
6318 function descriptor symbol if it is defined. Return NULL otherwise. */
6319
6320 static struct ppc_link_hash_entry *
6321 defined_func_desc (struct ppc_link_hash_entry *fh)
6322 {
6323 if (fh->oh != NULL
6324 && fh->oh->is_func_descriptor)
6325 {
6326 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6327 if (fdh->elf.root.type == bfd_link_hash_defined
6328 || fdh->elf.root.type == bfd_link_hash_defweak)
6329 return fdh;
6330 }
6331 return NULL;
6332 }
6333
6334 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6335
6336 /* Garbage collect sections, after first dealing with dot-symbols. */
6337
6338 static bfd_boolean
6339 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6340 {
6341 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6342
6343 if (htab != NULL && htab->need_func_desc_adj)
6344 {
6345 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6346 htab->need_func_desc_adj = 0;
6347 }
6348 return bfd_elf_gc_sections (abfd, info);
6349 }
6350
6351 /* Mark all our entry sym sections, both opd and code section. */
6352
6353 static void
6354 ppc64_elf_gc_keep (struct bfd_link_info *info)
6355 {
6356 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6357 struct bfd_sym_chain *sym;
6358
6359 if (htab == NULL)
6360 return;
6361
6362 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6363 {
6364 struct ppc_link_hash_entry *eh, *fh;
6365 asection *sec;
6366
6367 eh = (struct ppc_link_hash_entry *)
6368 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6369 if (eh == NULL)
6370 continue;
6371 if (eh->elf.root.type != bfd_link_hash_defined
6372 && eh->elf.root.type != bfd_link_hash_defweak)
6373 continue;
6374
6375 fh = defined_code_entry (eh);
6376 if (fh != NULL)
6377 {
6378 sec = fh->elf.root.u.def.section;
6379 sec->flags |= SEC_KEEP;
6380 }
6381 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6382 && opd_entry_value (eh->elf.root.u.def.section,
6383 eh->elf.root.u.def.value,
6384 &sec, NULL, FALSE) != (bfd_vma) -1)
6385 sec->flags |= SEC_KEEP;
6386
6387 sec = eh->elf.root.u.def.section;
6388 sec->flags |= SEC_KEEP;
6389 }
6390 }
6391
6392 /* Mark sections containing dynamically referenced symbols. When
6393 building shared libraries, we must assume that any visible symbol is
6394 referenced. */
6395
6396 static bfd_boolean
6397 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6398 {
6399 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6400 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6401 struct ppc_link_hash_entry *fdh;
6402 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6403
6404 /* Dynamic linking info is on the func descriptor sym. */
6405 fdh = defined_func_desc (eh);
6406 if (fdh != NULL)
6407 eh = fdh;
6408
6409 if ((eh->elf.root.type == bfd_link_hash_defined
6410 || eh->elf.root.type == bfd_link_hash_defweak)
6411 && (eh->elf.ref_dynamic
6412 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6413 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6414 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6415 && (!bfd_link_executable (info)
6416 || info->gc_keep_exported
6417 || info->export_dynamic
6418 || (eh->elf.dynamic
6419 && d != NULL
6420 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6421 && (eh->elf.versioned >= versioned
6422 || !bfd_hide_sym_by_version (info->version_info,
6423 eh->elf.root.root.string)))))
6424 {
6425 asection *code_sec;
6426 struct ppc_link_hash_entry *fh;
6427
6428 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6429
6430 /* Function descriptor syms cause the associated
6431 function code sym section to be marked. */
6432 fh = defined_code_entry (eh);
6433 if (fh != NULL)
6434 {
6435 code_sec = fh->elf.root.u.def.section;
6436 code_sec->flags |= SEC_KEEP;
6437 }
6438 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6439 && opd_entry_value (eh->elf.root.u.def.section,
6440 eh->elf.root.u.def.value,
6441 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6442 code_sec->flags |= SEC_KEEP;
6443 }
6444
6445 return TRUE;
6446 }
6447
6448 /* Return the section that should be marked against GC for a given
6449 relocation. */
6450
6451 static asection *
6452 ppc64_elf_gc_mark_hook (asection *sec,
6453 struct bfd_link_info *info,
6454 Elf_Internal_Rela *rel,
6455 struct elf_link_hash_entry *h,
6456 Elf_Internal_Sym *sym)
6457 {
6458 asection *rsec;
6459
6460 /* Syms return NULL if we're marking .opd, so we avoid marking all
6461 function sections, as all functions are referenced in .opd. */
6462 rsec = NULL;
6463 if (get_opd_info (sec) != NULL)
6464 return rsec;
6465
6466 if (h != NULL)
6467 {
6468 enum elf_ppc64_reloc_type r_type;
6469 struct ppc_link_hash_entry *eh, *fh, *fdh;
6470
6471 r_type = ELF64_R_TYPE (rel->r_info);
6472 switch (r_type)
6473 {
6474 case R_PPC64_GNU_VTINHERIT:
6475 case R_PPC64_GNU_VTENTRY:
6476 break;
6477
6478 default:
6479 switch (h->root.type)
6480 {
6481 case bfd_link_hash_defined:
6482 case bfd_link_hash_defweak:
6483 eh = (struct ppc_link_hash_entry *) h;
6484 fdh = defined_func_desc (eh);
6485 if (fdh != NULL)
6486 {
6487 /* -mcall-aixdesc code references the dot-symbol on
6488 a call reloc. Mark the function descriptor too
6489 against garbage collection. */
6490 fdh->elf.mark = 1;
6491 if (fdh->elf.u.weakdef != NULL)
6492 fdh->elf.u.weakdef->mark = 1;
6493 eh = fdh;
6494 }
6495
6496 /* Function descriptor syms cause the associated
6497 function code sym section to be marked. */
6498 fh = defined_code_entry (eh);
6499 if (fh != NULL)
6500 {
6501 /* They also mark their opd section. */
6502 eh->elf.root.u.def.section->gc_mark = 1;
6503
6504 rsec = fh->elf.root.u.def.section;
6505 }
6506 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6507 && opd_entry_value (eh->elf.root.u.def.section,
6508 eh->elf.root.u.def.value,
6509 &rsec, NULL, FALSE) != (bfd_vma) -1)
6510 eh->elf.root.u.def.section->gc_mark = 1;
6511 else
6512 rsec = h->root.u.def.section;
6513 break;
6514
6515 case bfd_link_hash_common:
6516 rsec = h->root.u.c.p->section;
6517 break;
6518
6519 default:
6520 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6521 }
6522 }
6523 }
6524 else
6525 {
6526 struct _opd_sec_data *opd;
6527
6528 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6529 opd = get_opd_info (rsec);
6530 if (opd != NULL && opd->func_sec != NULL)
6531 {
6532 rsec->gc_mark = 1;
6533
6534 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6535 }
6536 }
6537
6538 return rsec;
6539 }
6540
6541 /* Update the .got, .plt. and dynamic reloc reference counts for the
6542 section being removed. */
6543
6544 static bfd_boolean
6545 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6546 asection *sec, const Elf_Internal_Rela *relocs)
6547 {
6548 struct ppc_link_hash_table *htab;
6549 Elf_Internal_Shdr *symtab_hdr;
6550 struct elf_link_hash_entry **sym_hashes;
6551 struct got_entry **local_got_ents;
6552 const Elf_Internal_Rela *rel, *relend;
6553
6554 if (bfd_link_relocatable (info))
6555 return TRUE;
6556
6557 if ((sec->flags & SEC_ALLOC) == 0)
6558 return TRUE;
6559
6560 elf_section_data (sec)->local_dynrel = NULL;
6561
6562 htab = ppc_hash_table (info);
6563 if (htab == NULL)
6564 return FALSE;
6565
6566 symtab_hdr = &elf_symtab_hdr (abfd);
6567 sym_hashes = elf_sym_hashes (abfd);
6568 local_got_ents = elf_local_got_ents (abfd);
6569
6570 relend = relocs + sec->reloc_count;
6571 for (rel = relocs; rel < relend; rel++)
6572 {
6573 unsigned long r_symndx;
6574 enum elf_ppc64_reloc_type r_type;
6575 struct elf_link_hash_entry *h = NULL;
6576 struct plt_entry **plt_list;
6577 unsigned char tls_type = 0;
6578
6579 r_symndx = ELF64_R_SYM (rel->r_info);
6580 r_type = ELF64_R_TYPE (rel->r_info);
6581 if (r_symndx >= symtab_hdr->sh_info)
6582 {
6583 struct ppc_link_hash_entry *eh;
6584 struct elf_dyn_relocs **pp;
6585 struct elf_dyn_relocs *p;
6586
6587 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6588 h = elf_follow_link (h);
6589 eh = (struct ppc_link_hash_entry *) h;
6590
6591 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6592 if (p->sec == sec)
6593 {
6594 /* Everything must go for SEC. */
6595 *pp = p->next;
6596 break;
6597 }
6598 }
6599
6600 switch (r_type)
6601 {
6602 case R_PPC64_GOT_TLSLD16:
6603 case R_PPC64_GOT_TLSLD16_LO:
6604 case R_PPC64_GOT_TLSLD16_HI:
6605 case R_PPC64_GOT_TLSLD16_HA:
6606 tls_type = TLS_TLS | TLS_LD;
6607 goto dogot;
6608
6609 case R_PPC64_GOT_TLSGD16:
6610 case R_PPC64_GOT_TLSGD16_LO:
6611 case R_PPC64_GOT_TLSGD16_HI:
6612 case R_PPC64_GOT_TLSGD16_HA:
6613 tls_type = TLS_TLS | TLS_GD;
6614 goto dogot;
6615
6616 case R_PPC64_GOT_TPREL16_DS:
6617 case R_PPC64_GOT_TPREL16_LO_DS:
6618 case R_PPC64_GOT_TPREL16_HI:
6619 case R_PPC64_GOT_TPREL16_HA:
6620 tls_type = TLS_TLS | TLS_TPREL;
6621 goto dogot;
6622
6623 case R_PPC64_GOT_DTPREL16_DS:
6624 case R_PPC64_GOT_DTPREL16_LO_DS:
6625 case R_PPC64_GOT_DTPREL16_HI:
6626 case R_PPC64_GOT_DTPREL16_HA:
6627 tls_type = TLS_TLS | TLS_DTPREL;
6628 goto dogot;
6629
6630 case R_PPC64_GOT16:
6631 case R_PPC64_GOT16_DS:
6632 case R_PPC64_GOT16_HA:
6633 case R_PPC64_GOT16_HI:
6634 case R_PPC64_GOT16_LO:
6635 case R_PPC64_GOT16_LO_DS:
6636 dogot:
6637 {
6638 struct got_entry *ent;
6639
6640 if (h != NULL)
6641 ent = h->got.glist;
6642 else
6643 ent = local_got_ents[r_symndx];
6644
6645 for (; ent != NULL; ent = ent->next)
6646 if (ent->addend == rel->r_addend
6647 && ent->owner == abfd
6648 && ent->tls_type == tls_type)
6649 break;
6650 if (ent == NULL)
6651 abort ();
6652 if (ent->got.refcount > 0)
6653 ent->got.refcount -= 1;
6654 }
6655 break;
6656
6657 case R_PPC64_PLT16_HA:
6658 case R_PPC64_PLT16_HI:
6659 case R_PPC64_PLT16_LO:
6660 case R_PPC64_PLT32:
6661 case R_PPC64_PLT64:
6662 case R_PPC64_REL14:
6663 case R_PPC64_REL14_BRNTAKEN:
6664 case R_PPC64_REL14_BRTAKEN:
6665 case R_PPC64_REL24:
6666 plt_list = NULL;
6667 if (h != NULL)
6668 plt_list = &h->plt.plist;
6669 else if (local_got_ents != NULL)
6670 {
6671 struct plt_entry **local_plt = (struct plt_entry **)
6672 (local_got_ents + symtab_hdr->sh_info);
6673 unsigned char *local_got_tls_masks = (unsigned char *)
6674 (local_plt + symtab_hdr->sh_info);
6675 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6676 plt_list = local_plt + r_symndx;
6677 }
6678 if (plt_list)
6679 {
6680 struct plt_entry *ent;
6681
6682 for (ent = *plt_list; ent != NULL; ent = ent->next)
6683 if (ent->addend == rel->r_addend)
6684 break;
6685 if (ent != NULL && ent->plt.refcount > 0)
6686 ent->plt.refcount -= 1;
6687 }
6688 break;
6689
6690 default:
6691 break;
6692 }
6693 }
6694 return TRUE;
6695 }
6696
6697 /* The maximum size of .sfpr. */
6698 #define SFPR_MAX (218*4)
6699
6700 struct sfpr_def_parms
6701 {
6702 const char name[12];
6703 unsigned char lo, hi;
6704 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6705 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6706 };
6707
6708 /* Auto-generate _save*, _rest* functions in .sfpr.
6709 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6710 instead. */
6711
6712 static bfd_boolean
6713 sfpr_define (struct bfd_link_info *info,
6714 const struct sfpr_def_parms *parm,
6715 asection *stub_sec)
6716 {
6717 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6718 unsigned int i;
6719 size_t len = strlen (parm->name);
6720 bfd_boolean writing = FALSE;
6721 char sym[16];
6722
6723 if (htab == NULL)
6724 return FALSE;
6725
6726 memcpy (sym, parm->name, len);
6727 sym[len + 2] = 0;
6728
6729 for (i = parm->lo; i <= parm->hi; i++)
6730 {
6731 struct ppc_link_hash_entry *h;
6732
6733 sym[len + 0] = i / 10 + '0';
6734 sym[len + 1] = i % 10 + '0';
6735 h = (struct ppc_link_hash_entry *)
6736 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6737 if (stub_sec != NULL)
6738 {
6739 if (h != NULL
6740 && h->elf.root.type == bfd_link_hash_defined
6741 && h->elf.root.u.def.section == htab->sfpr)
6742 {
6743 struct elf_link_hash_entry *s;
6744 char buf[32];
6745 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6746 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6747 if (s == NULL)
6748 return FALSE;
6749 if (s->root.type == bfd_link_hash_new
6750 || (s->root.type = bfd_link_hash_defined
6751 && s->root.u.def.section == stub_sec))
6752 {
6753 s->root.type = bfd_link_hash_defined;
6754 s->root.u.def.section = stub_sec;
6755 s->root.u.def.value = (stub_sec->size
6756 + h->elf.root.u.def.value);
6757 s->ref_regular = 1;
6758 s->def_regular = 1;
6759 s->ref_regular_nonweak = 1;
6760 s->forced_local = 1;
6761 s->non_elf = 0;
6762 s->root.linker_def = 1;
6763 }
6764 }
6765 continue;
6766 }
6767 if (h != NULL)
6768 {
6769 h->save_res = 1;
6770 if (!h->elf.def_regular)
6771 {
6772 h->elf.root.type = bfd_link_hash_defined;
6773 h->elf.root.u.def.section = htab->sfpr;
6774 h->elf.root.u.def.value = htab->sfpr->size;
6775 h->elf.type = STT_FUNC;
6776 h->elf.def_regular = 1;
6777 h->elf.non_elf = 0;
6778 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6779 writing = TRUE;
6780 if (htab->sfpr->contents == NULL)
6781 {
6782 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6783 if (htab->sfpr->contents == NULL)
6784 return FALSE;
6785 }
6786 }
6787 }
6788 if (writing)
6789 {
6790 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6791 if (i != parm->hi)
6792 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6793 else
6794 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6795 htab->sfpr->size = p - htab->sfpr->contents;
6796 }
6797 }
6798
6799 return TRUE;
6800 }
6801
6802 static bfd_byte *
6803 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6804 {
6805 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6806 return p + 4;
6807 }
6808
6809 static bfd_byte *
6810 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6811 {
6812 p = savegpr0 (abfd, p, r);
6813 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6814 p = p + 4;
6815 bfd_put_32 (abfd, BLR, p);
6816 return p + 4;
6817 }
6818
6819 static bfd_byte *
6820 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6821 {
6822 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6823 return p + 4;
6824 }
6825
6826 static bfd_byte *
6827 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6828 {
6829 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6830 p = p + 4;
6831 p = restgpr0 (abfd, p, r);
6832 bfd_put_32 (abfd, MTLR_R0, p);
6833 p = p + 4;
6834 if (r == 29)
6835 {
6836 p = restgpr0 (abfd, p, 30);
6837 p = restgpr0 (abfd, p, 31);
6838 }
6839 bfd_put_32 (abfd, BLR, p);
6840 return p + 4;
6841 }
6842
6843 static bfd_byte *
6844 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6845 {
6846 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6847 return p + 4;
6848 }
6849
6850 static bfd_byte *
6851 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6852 {
6853 p = savegpr1 (abfd, p, r);
6854 bfd_put_32 (abfd, BLR, p);
6855 return p + 4;
6856 }
6857
6858 static bfd_byte *
6859 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6860 {
6861 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6862 return p + 4;
6863 }
6864
6865 static bfd_byte *
6866 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6867 {
6868 p = restgpr1 (abfd, p, r);
6869 bfd_put_32 (abfd, BLR, p);
6870 return p + 4;
6871 }
6872
6873 static bfd_byte *
6874 savefpr (bfd *abfd, bfd_byte *p, int r)
6875 {
6876 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6877 return p + 4;
6878 }
6879
6880 static bfd_byte *
6881 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6882 {
6883 p = savefpr (abfd, p, r);
6884 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6885 p = p + 4;
6886 bfd_put_32 (abfd, BLR, p);
6887 return p + 4;
6888 }
6889
6890 static bfd_byte *
6891 restfpr (bfd *abfd, bfd_byte *p, int r)
6892 {
6893 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6894 return p + 4;
6895 }
6896
6897 static bfd_byte *
6898 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6899 {
6900 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6901 p = p + 4;
6902 p = restfpr (abfd, p, r);
6903 bfd_put_32 (abfd, MTLR_R0, p);
6904 p = p + 4;
6905 if (r == 29)
6906 {
6907 p = restfpr (abfd, p, 30);
6908 p = restfpr (abfd, p, 31);
6909 }
6910 bfd_put_32 (abfd, BLR, p);
6911 return p + 4;
6912 }
6913
6914 static bfd_byte *
6915 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6916 {
6917 p = savefpr (abfd, p, r);
6918 bfd_put_32 (abfd, BLR, p);
6919 return p + 4;
6920 }
6921
6922 static bfd_byte *
6923 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6924 {
6925 p = restfpr (abfd, p, r);
6926 bfd_put_32 (abfd, BLR, p);
6927 return p + 4;
6928 }
6929
6930 static bfd_byte *
6931 savevr (bfd *abfd, bfd_byte *p, int r)
6932 {
6933 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6934 p = p + 4;
6935 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6936 return p + 4;
6937 }
6938
6939 static bfd_byte *
6940 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6941 {
6942 p = savevr (abfd, p, r);
6943 bfd_put_32 (abfd, BLR, p);
6944 return p + 4;
6945 }
6946
6947 static bfd_byte *
6948 restvr (bfd *abfd, bfd_byte *p, int r)
6949 {
6950 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6951 p = p + 4;
6952 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6953 return p + 4;
6954 }
6955
6956 static bfd_byte *
6957 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6958 {
6959 p = restvr (abfd, p, r);
6960 bfd_put_32 (abfd, BLR, p);
6961 return p + 4;
6962 }
6963
6964 /* Called via elf_link_hash_traverse to transfer dynamic linking
6965 information on function code symbol entries to their corresponding
6966 function descriptor symbol entries. */
6967
6968 static bfd_boolean
6969 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6970 {
6971 struct bfd_link_info *info;
6972 struct ppc_link_hash_table *htab;
6973 struct ppc_link_hash_entry *fh;
6974 struct ppc_link_hash_entry *fdh;
6975 bfd_boolean force_local;
6976
6977 fh = (struct ppc_link_hash_entry *) h;
6978 if (fh->elf.root.type == bfd_link_hash_indirect)
6979 return TRUE;
6980
6981 if (!fh->is_func)
6982 return TRUE;
6983
6984 if (fh->elf.root.root.string[0] != '.'
6985 || fh->elf.root.root.string[1] == '\0')
6986 return TRUE;
6987
6988 info = inf;
6989 htab = ppc_hash_table (info);
6990 if (htab == NULL)
6991 return FALSE;
6992
6993 /* Find the corresponding function descriptor symbol. */
6994 fdh = lookup_fdh (fh, htab);
6995
6996 /* Resolve undefined references to dot-symbols as the value
6997 in the function descriptor, if we have one in a regular object.
6998 This is to satisfy cases like ".quad .foo". Calls to functions
6999 in dynamic objects are handled elsewhere. */
7000 if ((fh->elf.root.type == bfd_link_hash_undefined
7001 || fh->elf.root.type == bfd_link_hash_undefweak)
7002 && (fdh->elf.root.type == bfd_link_hash_defined
7003 || fdh->elf.root.type == bfd_link_hash_defweak)
7004 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7005 && opd_entry_value (fdh->elf.root.u.def.section,
7006 fdh->elf.root.u.def.value,
7007 &fh->elf.root.u.def.section,
7008 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7009 {
7010 fh->elf.root.type = fdh->elf.root.type;
7011 fh->elf.forced_local = 1;
7012 fh->elf.def_regular = fdh->elf.def_regular;
7013 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7014 }
7015
7016 if (!fh->elf.dynamic)
7017 {
7018 struct plt_entry *ent;
7019
7020 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7021 if (ent->plt.refcount > 0)
7022 break;
7023 if (ent == NULL)
7024 return TRUE;
7025 }
7026
7027 /* Create a descriptor as undefined if necessary. */
7028 if (fdh == NULL
7029 && !bfd_link_executable (info)
7030 && (fh->elf.root.type == bfd_link_hash_undefined
7031 || fh->elf.root.type == bfd_link_hash_undefweak))
7032 {
7033 fdh = make_fdh (info, fh);
7034 if (fdh == NULL)
7035 return FALSE;
7036 }
7037
7038 /* We can't support overriding of symbols on a fake descriptor. */
7039 if (fdh != NULL
7040 && fdh->fake
7041 && (fh->elf.root.type == bfd_link_hash_defined
7042 || fh->elf.root.type == bfd_link_hash_defweak))
7043 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7044
7045 /* Transfer dynamic linking information to the function descriptor. */
7046 if (fdh != NULL)
7047 {
7048 fdh->elf.ref_regular |= fh->elf.ref_regular;
7049 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7050 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7051 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7052 fdh->elf.dynamic |= fh->elf.dynamic;
7053 fdh->elf.needs_plt |= (fh->elf.needs_plt
7054 || fh->elf.type == STT_FUNC
7055 || fh->elf.type == STT_GNU_IFUNC);
7056 move_plt_plist (fh, fdh);
7057
7058 if (!fdh->elf.forced_local
7059 && fh->elf.dynindx != -1)
7060 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7061 return FALSE;
7062 }
7063
7064 /* Now that the info is on the function descriptor, clear the
7065 function code sym info. Any function code syms for which we
7066 don't have a definition in a regular file, we force local.
7067 This prevents a shared library from exporting syms that have
7068 been imported from another library. Function code syms that
7069 are really in the library we must leave global to prevent the
7070 linker dragging in a definition from a static library. */
7071 force_local = (!fh->elf.def_regular
7072 || fdh == NULL
7073 || !fdh->elf.def_regular
7074 || fdh->elf.forced_local);
7075 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7076
7077 return TRUE;
7078 }
7079
7080 static const struct sfpr_def_parms save_res_funcs[] =
7081 {
7082 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7083 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7084 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7085 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7086 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7087 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7088 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7089 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7090 { "._savef", 14, 31, savefpr, savefpr1_tail },
7091 { "._restf", 14, 31, restfpr, restfpr1_tail },
7092 { "_savevr_", 20, 31, savevr, savevr_tail },
7093 { "_restvr_", 20, 31, restvr, restvr_tail }
7094 };
7095
7096 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7097 this hook to a) provide some gcc support functions, and b) transfer
7098 dynamic linking information gathered so far on function code symbol
7099 entries, to their corresponding function descriptor symbol entries. */
7100
7101 static bfd_boolean
7102 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7103 struct bfd_link_info *info)
7104 {
7105 struct ppc_link_hash_table *htab;
7106
7107 htab = ppc_hash_table (info);
7108 if (htab == NULL)
7109 return FALSE;
7110
7111 /* Provide any missing _save* and _rest* functions. */
7112 if (htab->sfpr != NULL)
7113 {
7114 unsigned int i;
7115
7116 htab->sfpr->size = 0;
7117 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7118 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7119 return FALSE;
7120 if (htab->sfpr->size == 0)
7121 htab->sfpr->flags |= SEC_EXCLUDE;
7122 }
7123
7124 if (bfd_link_relocatable (info))
7125 return TRUE;
7126
7127 if (htab->elf.hgot != NULL)
7128 {
7129 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7130 /* Make .TOC. defined so as to prevent it being made dynamic.
7131 The wrong value here is fixed later in ppc64_elf_set_toc. */
7132 if (!htab->elf.hgot->def_regular
7133 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7134 {
7135 htab->elf.hgot->root.type = bfd_link_hash_defined;
7136 htab->elf.hgot->root.u.def.value = 0;
7137 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7138 htab->elf.hgot->def_regular = 1;
7139 htab->elf.hgot->root.linker_def = 1;
7140 }
7141 htab->elf.hgot->type = STT_OBJECT;
7142 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7143 | STV_HIDDEN);
7144 }
7145
7146 if (htab->need_func_desc_adj)
7147 {
7148 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7149 htab->need_func_desc_adj = 0;
7150 }
7151
7152 return TRUE;
7153 }
7154
7155 /* Return true if we have dynamic relocs against H that apply to
7156 read-only sections. */
7157
7158 static bfd_boolean
7159 readonly_dynrelocs (struct elf_link_hash_entry *h)
7160 {
7161 struct ppc_link_hash_entry *eh;
7162 struct elf_dyn_relocs *p;
7163
7164 eh = (struct ppc_link_hash_entry *) h;
7165 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7166 {
7167 asection *s = p->sec->output_section;
7168
7169 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7170 return TRUE;
7171 }
7172 return FALSE;
7173 }
7174
7175 /* Return true if we have dynamic relocs against H or any of its weak
7176 aliases, that apply to read-only sections. */
7177
7178 static bfd_boolean
7179 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7180 {
7181 struct ppc_link_hash_entry *eh;
7182
7183 eh = (struct ppc_link_hash_entry *) h;
7184 do
7185 {
7186 if (readonly_dynrelocs (&eh->elf))
7187 return TRUE;
7188 eh = eh->weakref;
7189 } while (eh != NULL && &eh->elf != h);
7190
7191 return FALSE;
7192 }
7193
7194 /* Return whether EH has pc-relative dynamic relocs. */
7195
7196 static bfd_boolean
7197 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7198 {
7199 struct elf_dyn_relocs *p;
7200
7201 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7202 if (p->pc_count != 0)
7203 return TRUE;
7204 return FALSE;
7205 }
7206
7207 /* Return true if a global entry stub will be created for H. Valid
7208 for ELFv2 before plt entries have been allocated. */
7209
7210 static bfd_boolean
7211 global_entry_stub (struct elf_link_hash_entry *h)
7212 {
7213 struct plt_entry *pent;
7214
7215 if (!h->pointer_equality_needed
7216 || h->def_regular)
7217 return FALSE;
7218
7219 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7220 if (pent->plt.refcount > 0
7221 && pent->addend == 0)
7222 return TRUE;
7223
7224 return FALSE;
7225 }
7226
7227 /* Adjust a symbol defined by a dynamic object and referenced by a
7228 regular object. The current definition is in some section of the
7229 dynamic object, but we're not including those sections. We have to
7230 change the definition to something the rest of the link can
7231 understand. */
7232
7233 static bfd_boolean
7234 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7235 struct elf_link_hash_entry *h)
7236 {
7237 struct ppc_link_hash_table *htab;
7238 asection *s, *srel;
7239
7240 htab = ppc_hash_table (info);
7241 if (htab == NULL)
7242 return FALSE;
7243
7244 /* Deal with function syms. */
7245 if (h->type == STT_FUNC
7246 || h->type == STT_GNU_IFUNC
7247 || h->needs_plt)
7248 {
7249 /* Clear procedure linkage table information for any symbol that
7250 won't need a .plt entry. */
7251 struct plt_entry *ent;
7252 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7253 if (ent->plt.refcount > 0)
7254 break;
7255 if (ent == NULL
7256 || (h->type != STT_GNU_IFUNC
7257 && (SYMBOL_CALLS_LOCAL (info, h)
7258 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7259 && h->root.type == bfd_link_hash_undefweak)))
7260 || ((struct ppc_link_hash_entry *) h)->save_res)
7261 {
7262 h->plt.plist = NULL;
7263 h->needs_plt = 0;
7264 h->pointer_equality_needed = 0;
7265 }
7266 else if (abiversion (info->output_bfd) >= 2)
7267 {
7268 /* Taking a function's address in a read/write section
7269 doesn't require us to define the function symbol in the
7270 executable on a global entry stub. A dynamic reloc can
7271 be used instead. The reason we prefer a few more dynamic
7272 relocs is that calling via a global entry stub costs a
7273 few more instructions, and pointer_equality_needed causes
7274 extra work in ld.so when resolving these symbols. */
7275 if (global_entry_stub (h)
7276 && !alias_readonly_dynrelocs (h))
7277 {
7278 h->pointer_equality_needed = 0;
7279 /* After adjust_dynamic_symbol, non_got_ref set in
7280 the non-pic case means that dyn_relocs for this
7281 symbol should be discarded. */
7282 h->non_got_ref = 0;
7283 }
7284
7285 /* If making a plt entry, then we don't need copy relocs. */
7286 return TRUE;
7287 }
7288 }
7289 else
7290 h->plt.plist = NULL;
7291
7292 /* If this is a weak symbol, and there is a real definition, the
7293 processor independent code will have arranged for us to see the
7294 real definition first, and we can just use the same value. */
7295 if (h->u.weakdef != NULL)
7296 {
7297 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7298 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7299 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7300 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7301 if (ELIMINATE_COPY_RELOCS)
7302 h->non_got_ref = h->u.weakdef->non_got_ref;
7303 return TRUE;
7304 }
7305
7306 /* If we are creating a shared library, we must presume that the
7307 only references to the symbol are via the global offset table.
7308 For such cases we need not do anything here; the relocations will
7309 be handled correctly by relocate_section. */
7310 if (bfd_link_pic (info))
7311 return TRUE;
7312
7313 /* If there are no references to this symbol that do not use the
7314 GOT, we don't need to generate a copy reloc. */
7315 if (!h->non_got_ref)
7316 return TRUE;
7317
7318 /* Don't generate a copy reloc for symbols defined in the executable. */
7319 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7320
7321 /* If -z nocopyreloc was given, don't generate them either. */
7322 || info->nocopyreloc
7323
7324 /* If we didn't find any dynamic relocs in read-only sections, then
7325 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7326 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7327
7328 /* Protected variables do not work with .dynbss. The copy in
7329 .dynbss won't be used by the shared library with the protected
7330 definition for the variable. Text relocations are preferable
7331 to an incorrect program. */
7332 || h->protected_def)
7333 {
7334 h->non_got_ref = 0;
7335 return TRUE;
7336 }
7337
7338 if (h->plt.plist != NULL)
7339 {
7340 /* We should never get here, but unfortunately there are versions
7341 of gcc out there that improperly (for this ABI) put initialized
7342 function pointers, vtable refs and suchlike in read-only
7343 sections. Allow them to proceed, but warn that this might
7344 break at runtime. */
7345 info->callbacks->einfo
7346 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7347 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7348 h->root.root.string);
7349 }
7350
7351 /* This is a reference to a symbol defined by a dynamic object which
7352 is not a function. */
7353
7354 /* We must allocate the symbol in our .dynbss section, which will
7355 become part of the .bss section of the executable. There will be
7356 an entry for this symbol in the .dynsym section. The dynamic
7357 object will contain position independent code, so all references
7358 from the dynamic object to this symbol will go through the global
7359 offset table. The dynamic linker will use the .dynsym entry to
7360 determine the address it must put in the global offset table, so
7361 both the dynamic object and the regular object will refer to the
7362 same memory location for the variable. */
7363
7364 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7365 to copy the initial value out of the dynamic object and into the
7366 runtime process image. We need to remember the offset into the
7367 .rela.bss section we are going to use. */
7368 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7369 {
7370 s = htab->elf.sdynrelro;
7371 srel = htab->elf.sreldynrelro;
7372 }
7373 else
7374 {
7375 s = htab->elf.sdynbss;
7376 srel = htab->elf.srelbss;
7377 }
7378 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7379 {
7380 srel->size += sizeof (Elf64_External_Rela);
7381 h->needs_copy = 1;
7382 }
7383
7384 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7385 }
7386
7387 /* If given a function descriptor symbol, hide both the function code
7388 sym and the descriptor. */
7389 static void
7390 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7391 struct elf_link_hash_entry *h,
7392 bfd_boolean force_local)
7393 {
7394 struct ppc_link_hash_entry *eh;
7395 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7396
7397 eh = (struct ppc_link_hash_entry *) h;
7398 if (eh->is_func_descriptor)
7399 {
7400 struct ppc_link_hash_entry *fh = eh->oh;
7401
7402 if (fh == NULL)
7403 {
7404 const char *p, *q;
7405 struct elf_link_hash_table *htab = elf_hash_table (info);
7406 char save;
7407
7408 /* We aren't supposed to use alloca in BFD because on
7409 systems which do not have alloca the version in libiberty
7410 calls xmalloc, which might cause the program to crash
7411 when it runs out of memory. This function doesn't have a
7412 return status, so there's no way to gracefully return an
7413 error. So cheat. We know that string[-1] can be safely
7414 accessed; It's either a string in an ELF string table,
7415 or allocated in an objalloc structure. */
7416
7417 p = eh->elf.root.root.string - 1;
7418 save = *p;
7419 *(char *) p = '.';
7420 fh = (struct ppc_link_hash_entry *)
7421 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7422 *(char *) p = save;
7423
7424 /* Unfortunately, if it so happens that the string we were
7425 looking for was allocated immediately before this string,
7426 then we overwrote the string terminator. That's the only
7427 reason the lookup should fail. */
7428 if (fh == NULL)
7429 {
7430 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7431 while (q >= eh->elf.root.root.string && *q == *p)
7432 --q, --p;
7433 if (q < eh->elf.root.root.string && *p == '.')
7434 fh = (struct ppc_link_hash_entry *)
7435 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7436 }
7437 if (fh != NULL)
7438 {
7439 eh->oh = fh;
7440 fh->oh = eh;
7441 }
7442 }
7443 if (fh != NULL)
7444 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7445 }
7446 }
7447
7448 static bfd_boolean
7449 get_sym_h (struct elf_link_hash_entry **hp,
7450 Elf_Internal_Sym **symp,
7451 asection **symsecp,
7452 unsigned char **tls_maskp,
7453 Elf_Internal_Sym **locsymsp,
7454 unsigned long r_symndx,
7455 bfd *ibfd)
7456 {
7457 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7458
7459 if (r_symndx >= symtab_hdr->sh_info)
7460 {
7461 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7462 struct elf_link_hash_entry *h;
7463
7464 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7465 h = elf_follow_link (h);
7466
7467 if (hp != NULL)
7468 *hp = h;
7469
7470 if (symp != NULL)
7471 *symp = NULL;
7472
7473 if (symsecp != NULL)
7474 {
7475 asection *symsec = NULL;
7476 if (h->root.type == bfd_link_hash_defined
7477 || h->root.type == bfd_link_hash_defweak)
7478 symsec = h->root.u.def.section;
7479 *symsecp = symsec;
7480 }
7481
7482 if (tls_maskp != NULL)
7483 {
7484 struct ppc_link_hash_entry *eh;
7485
7486 eh = (struct ppc_link_hash_entry *) h;
7487 *tls_maskp = &eh->tls_mask;
7488 }
7489 }
7490 else
7491 {
7492 Elf_Internal_Sym *sym;
7493 Elf_Internal_Sym *locsyms = *locsymsp;
7494
7495 if (locsyms == NULL)
7496 {
7497 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7498 if (locsyms == NULL)
7499 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7500 symtab_hdr->sh_info,
7501 0, NULL, NULL, NULL);
7502 if (locsyms == NULL)
7503 return FALSE;
7504 *locsymsp = locsyms;
7505 }
7506 sym = locsyms + r_symndx;
7507
7508 if (hp != NULL)
7509 *hp = NULL;
7510
7511 if (symp != NULL)
7512 *symp = sym;
7513
7514 if (symsecp != NULL)
7515 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7516
7517 if (tls_maskp != NULL)
7518 {
7519 struct got_entry **lgot_ents;
7520 unsigned char *tls_mask;
7521
7522 tls_mask = NULL;
7523 lgot_ents = elf_local_got_ents (ibfd);
7524 if (lgot_ents != NULL)
7525 {
7526 struct plt_entry **local_plt = (struct plt_entry **)
7527 (lgot_ents + symtab_hdr->sh_info);
7528 unsigned char *lgot_masks = (unsigned char *)
7529 (local_plt + symtab_hdr->sh_info);
7530 tls_mask = &lgot_masks[r_symndx];
7531 }
7532 *tls_maskp = tls_mask;
7533 }
7534 }
7535 return TRUE;
7536 }
7537
7538 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7539 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7540 type suitable for optimization, and 1 otherwise. */
7541
7542 static int
7543 get_tls_mask (unsigned char **tls_maskp,
7544 unsigned long *toc_symndx,
7545 bfd_vma *toc_addend,
7546 Elf_Internal_Sym **locsymsp,
7547 const Elf_Internal_Rela *rel,
7548 bfd *ibfd)
7549 {
7550 unsigned long r_symndx;
7551 int next_r;
7552 struct elf_link_hash_entry *h;
7553 Elf_Internal_Sym *sym;
7554 asection *sec;
7555 bfd_vma off;
7556
7557 r_symndx = ELF64_R_SYM (rel->r_info);
7558 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7559 return 0;
7560
7561 if ((*tls_maskp != NULL && **tls_maskp != 0)
7562 || sec == NULL
7563 || ppc64_elf_section_data (sec) == NULL
7564 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7565 return 1;
7566
7567 /* Look inside a TOC section too. */
7568 if (h != NULL)
7569 {
7570 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7571 off = h->root.u.def.value;
7572 }
7573 else
7574 off = sym->st_value;
7575 off += rel->r_addend;
7576 BFD_ASSERT (off % 8 == 0);
7577 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7578 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7579 if (toc_symndx != NULL)
7580 *toc_symndx = r_symndx;
7581 if (toc_addend != NULL)
7582 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7583 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7584 return 0;
7585 if ((h == NULL || is_static_defined (h))
7586 && (next_r == -1 || next_r == -2))
7587 return 1 - next_r;
7588 return 1;
7589 }
7590
7591 /* Find (or create) an entry in the tocsave hash table. */
7592
7593 static struct tocsave_entry *
7594 tocsave_find (struct ppc_link_hash_table *htab,
7595 enum insert_option insert,
7596 Elf_Internal_Sym **local_syms,
7597 const Elf_Internal_Rela *irela,
7598 bfd *ibfd)
7599 {
7600 unsigned long r_indx;
7601 struct elf_link_hash_entry *h;
7602 Elf_Internal_Sym *sym;
7603 struct tocsave_entry ent, *p;
7604 hashval_t hash;
7605 struct tocsave_entry **slot;
7606
7607 r_indx = ELF64_R_SYM (irela->r_info);
7608 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7609 return NULL;
7610 if (ent.sec == NULL || ent.sec->output_section == NULL)
7611 {
7612 _bfd_error_handler
7613 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7614 return NULL;
7615 }
7616
7617 if (h != NULL)
7618 ent.offset = h->root.u.def.value;
7619 else
7620 ent.offset = sym->st_value;
7621 ent.offset += irela->r_addend;
7622
7623 hash = tocsave_htab_hash (&ent);
7624 slot = ((struct tocsave_entry **)
7625 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7626 if (slot == NULL)
7627 return NULL;
7628
7629 if (*slot == NULL)
7630 {
7631 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7632 if (p == NULL)
7633 return NULL;
7634 *p = ent;
7635 *slot = p;
7636 }
7637 return *slot;
7638 }
7639
7640 /* Adjust all global syms defined in opd sections. In gcc generated
7641 code for the old ABI, these will already have been done. */
7642
7643 static bfd_boolean
7644 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7645 {
7646 struct ppc_link_hash_entry *eh;
7647 asection *sym_sec;
7648 struct _opd_sec_data *opd;
7649
7650 if (h->root.type == bfd_link_hash_indirect)
7651 return TRUE;
7652
7653 if (h->root.type != bfd_link_hash_defined
7654 && h->root.type != bfd_link_hash_defweak)
7655 return TRUE;
7656
7657 eh = (struct ppc_link_hash_entry *) h;
7658 if (eh->adjust_done)
7659 return TRUE;
7660
7661 sym_sec = eh->elf.root.u.def.section;
7662 opd = get_opd_info (sym_sec);
7663 if (opd != NULL && opd->adjust != NULL)
7664 {
7665 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7666 if (adjust == -1)
7667 {
7668 /* This entry has been deleted. */
7669 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7670 if (dsec == NULL)
7671 {
7672 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7673 if (discarded_section (dsec))
7674 {
7675 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7676 break;
7677 }
7678 }
7679 eh->elf.root.u.def.value = 0;
7680 eh->elf.root.u.def.section = dsec;
7681 }
7682 else
7683 eh->elf.root.u.def.value += adjust;
7684 eh->adjust_done = 1;
7685 }
7686 return TRUE;
7687 }
7688
7689 /* Handles decrementing dynamic reloc counts for the reloc specified by
7690 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7691 have already been determined. */
7692
7693 static bfd_boolean
7694 dec_dynrel_count (bfd_vma r_info,
7695 asection *sec,
7696 struct bfd_link_info *info,
7697 Elf_Internal_Sym **local_syms,
7698 struct elf_link_hash_entry *h,
7699 Elf_Internal_Sym *sym)
7700 {
7701 enum elf_ppc64_reloc_type r_type;
7702 asection *sym_sec = NULL;
7703
7704 /* Can this reloc be dynamic? This switch, and later tests here
7705 should be kept in sync with the code in check_relocs. */
7706 r_type = ELF64_R_TYPE (r_info);
7707 switch (r_type)
7708 {
7709 default:
7710 return TRUE;
7711
7712 case R_PPC64_TPREL16:
7713 case R_PPC64_TPREL16_LO:
7714 case R_PPC64_TPREL16_HI:
7715 case R_PPC64_TPREL16_HA:
7716 case R_PPC64_TPREL16_DS:
7717 case R_PPC64_TPREL16_LO_DS:
7718 case R_PPC64_TPREL16_HIGH:
7719 case R_PPC64_TPREL16_HIGHA:
7720 case R_PPC64_TPREL16_HIGHER:
7721 case R_PPC64_TPREL16_HIGHERA:
7722 case R_PPC64_TPREL16_HIGHEST:
7723 case R_PPC64_TPREL16_HIGHESTA:
7724 if (!bfd_link_pic (info))
7725 return TRUE;
7726
7727 case R_PPC64_TPREL64:
7728 case R_PPC64_DTPMOD64:
7729 case R_PPC64_DTPREL64:
7730 case R_PPC64_ADDR64:
7731 case R_PPC64_REL30:
7732 case R_PPC64_REL32:
7733 case R_PPC64_REL64:
7734 case R_PPC64_ADDR14:
7735 case R_PPC64_ADDR14_BRNTAKEN:
7736 case R_PPC64_ADDR14_BRTAKEN:
7737 case R_PPC64_ADDR16:
7738 case R_PPC64_ADDR16_DS:
7739 case R_PPC64_ADDR16_HA:
7740 case R_PPC64_ADDR16_HI:
7741 case R_PPC64_ADDR16_HIGH:
7742 case R_PPC64_ADDR16_HIGHA:
7743 case R_PPC64_ADDR16_HIGHER:
7744 case R_PPC64_ADDR16_HIGHERA:
7745 case R_PPC64_ADDR16_HIGHEST:
7746 case R_PPC64_ADDR16_HIGHESTA:
7747 case R_PPC64_ADDR16_LO:
7748 case R_PPC64_ADDR16_LO_DS:
7749 case R_PPC64_ADDR24:
7750 case R_PPC64_ADDR32:
7751 case R_PPC64_UADDR16:
7752 case R_PPC64_UADDR32:
7753 case R_PPC64_UADDR64:
7754 case R_PPC64_TOC:
7755 break;
7756 }
7757
7758 if (local_syms != NULL)
7759 {
7760 unsigned long r_symndx;
7761 bfd *ibfd = sec->owner;
7762
7763 r_symndx = ELF64_R_SYM (r_info);
7764 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7765 return FALSE;
7766 }
7767
7768 if ((bfd_link_pic (info)
7769 && (must_be_dyn_reloc (info, r_type)
7770 || (h != NULL
7771 && (!SYMBOLIC_BIND (info, h)
7772 || h->root.type == bfd_link_hash_defweak
7773 || !h->def_regular))))
7774 || (ELIMINATE_COPY_RELOCS
7775 && !bfd_link_pic (info)
7776 && h != NULL
7777 && (h->root.type == bfd_link_hash_defweak
7778 || !h->def_regular)))
7779 ;
7780 else
7781 return TRUE;
7782
7783 if (h != NULL)
7784 {
7785 struct elf_dyn_relocs *p;
7786 struct elf_dyn_relocs **pp;
7787 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7788
7789 /* elf_gc_sweep may have already removed all dyn relocs associated
7790 with local syms for a given section. Also, symbol flags are
7791 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7792 report a dynreloc miscount. */
7793 if (*pp == NULL && info->gc_sections)
7794 return TRUE;
7795
7796 while ((p = *pp) != NULL)
7797 {
7798 if (p->sec == sec)
7799 {
7800 if (!must_be_dyn_reloc (info, r_type))
7801 p->pc_count -= 1;
7802 p->count -= 1;
7803 if (p->count == 0)
7804 *pp = p->next;
7805 return TRUE;
7806 }
7807 pp = &p->next;
7808 }
7809 }
7810 else
7811 {
7812 struct ppc_dyn_relocs *p;
7813 struct ppc_dyn_relocs **pp;
7814 void *vpp;
7815 bfd_boolean is_ifunc;
7816
7817 if (local_syms == NULL)
7818 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7819 if (sym_sec == NULL)
7820 sym_sec = sec;
7821
7822 vpp = &elf_section_data (sym_sec)->local_dynrel;
7823 pp = (struct ppc_dyn_relocs **) vpp;
7824
7825 if (*pp == NULL && info->gc_sections)
7826 return TRUE;
7827
7828 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7829 while ((p = *pp) != NULL)
7830 {
7831 if (p->sec == sec && p->ifunc == is_ifunc)
7832 {
7833 p->count -= 1;
7834 if (p->count == 0)
7835 *pp = p->next;
7836 return TRUE;
7837 }
7838 pp = &p->next;
7839 }
7840 }
7841
7842 /* xgettext:c-format */
7843 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7844 sec->owner, sec);
7845 bfd_set_error (bfd_error_bad_value);
7846 return FALSE;
7847 }
7848
7849 /* Remove unused Official Procedure Descriptor entries. Currently we
7850 only remove those associated with functions in discarded link-once
7851 sections, or weakly defined functions that have been overridden. It
7852 would be possible to remove many more entries for statically linked
7853 applications. */
7854
7855 bfd_boolean
7856 ppc64_elf_edit_opd (struct bfd_link_info *info)
7857 {
7858 bfd *ibfd;
7859 bfd_boolean some_edited = FALSE;
7860 asection *need_pad = NULL;
7861 struct ppc_link_hash_table *htab;
7862
7863 htab = ppc_hash_table (info);
7864 if (htab == NULL)
7865 return FALSE;
7866
7867 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7868 {
7869 asection *sec;
7870 Elf_Internal_Rela *relstart, *rel, *relend;
7871 Elf_Internal_Shdr *symtab_hdr;
7872 Elf_Internal_Sym *local_syms;
7873 struct _opd_sec_data *opd;
7874 bfd_boolean need_edit, add_aux_fields, broken;
7875 bfd_size_type cnt_16b = 0;
7876
7877 if (!is_ppc64_elf (ibfd))
7878 continue;
7879
7880 sec = bfd_get_section_by_name (ibfd, ".opd");
7881 if (sec == NULL || sec->size == 0)
7882 continue;
7883
7884 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7885 continue;
7886
7887 if (sec->output_section == bfd_abs_section_ptr)
7888 continue;
7889
7890 /* Look through the section relocs. */
7891 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7892 continue;
7893
7894 local_syms = NULL;
7895 symtab_hdr = &elf_symtab_hdr (ibfd);
7896
7897 /* Read the relocations. */
7898 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7899 info->keep_memory);
7900 if (relstart == NULL)
7901 return FALSE;
7902
7903 /* First run through the relocs to check they are sane, and to
7904 determine whether we need to edit this opd section. */
7905 need_edit = FALSE;
7906 broken = FALSE;
7907 need_pad = sec;
7908 relend = relstart + sec->reloc_count;
7909 for (rel = relstart; rel < relend; )
7910 {
7911 enum elf_ppc64_reloc_type r_type;
7912 unsigned long r_symndx;
7913 asection *sym_sec;
7914 struct elf_link_hash_entry *h;
7915 Elf_Internal_Sym *sym;
7916 bfd_vma offset;
7917
7918 /* .opd contains an array of 16 or 24 byte entries. We're
7919 only interested in the reloc pointing to a function entry
7920 point. */
7921 offset = rel->r_offset;
7922 if (rel + 1 == relend
7923 || rel[1].r_offset != offset + 8)
7924 {
7925 /* If someone messes with .opd alignment then after a
7926 "ld -r" we might have padding in the middle of .opd.
7927 Also, there's nothing to prevent someone putting
7928 something silly in .opd with the assembler. No .opd
7929 optimization for them! */
7930 broken_opd:
7931 _bfd_error_handler
7932 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7933 broken = TRUE;
7934 break;
7935 }
7936
7937 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7938 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7939 {
7940 _bfd_error_handler
7941 /* xgettext:c-format */
7942 (_("%B: unexpected reloc type %u in .opd section"),
7943 ibfd, r_type);
7944 broken = TRUE;
7945 break;
7946 }
7947
7948 r_symndx = ELF64_R_SYM (rel->r_info);
7949 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7950 r_symndx, ibfd))
7951 goto error_ret;
7952
7953 if (sym_sec == NULL || sym_sec->owner == NULL)
7954 {
7955 const char *sym_name;
7956 if (h != NULL)
7957 sym_name = h->root.root.string;
7958 else
7959 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7960 sym_sec);
7961
7962 _bfd_error_handler
7963 /* xgettext:c-format */
7964 (_("%B: undefined sym `%s' in .opd section"),
7965 ibfd, sym_name);
7966 broken = TRUE;
7967 break;
7968 }
7969
7970 /* opd entries are always for functions defined in the
7971 current input bfd. If the symbol isn't defined in the
7972 input bfd, then we won't be using the function in this
7973 bfd; It must be defined in a linkonce section in another
7974 bfd, or is weak. It's also possible that we are
7975 discarding the function due to a linker script /DISCARD/,
7976 which we test for via the output_section. */
7977 if (sym_sec->owner != ibfd
7978 || sym_sec->output_section == bfd_abs_section_ptr)
7979 need_edit = TRUE;
7980
7981 rel += 2;
7982 if (rel + 1 == relend
7983 || (rel + 2 < relend
7984 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7985 ++rel;
7986
7987 if (rel == relend)
7988 {
7989 if (sec->size == offset + 24)
7990 {
7991 need_pad = NULL;
7992 break;
7993 }
7994 if (sec->size == offset + 16)
7995 {
7996 cnt_16b++;
7997 break;
7998 }
7999 goto broken_opd;
8000 }
8001 else if (rel + 1 < relend
8002 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8003 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8004 {
8005 if (rel[0].r_offset == offset + 16)
8006 cnt_16b++;
8007 else if (rel[0].r_offset != offset + 24)
8008 goto broken_opd;
8009 }
8010 else
8011 goto broken_opd;
8012 }
8013
8014 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8015
8016 if (!broken && (need_edit || add_aux_fields))
8017 {
8018 Elf_Internal_Rela *write_rel;
8019 Elf_Internal_Shdr *rel_hdr;
8020 bfd_byte *rptr, *wptr;
8021 bfd_byte *new_contents;
8022 bfd_size_type amt;
8023
8024 new_contents = NULL;
8025 amt = OPD_NDX (sec->size) * sizeof (long);
8026 opd = &ppc64_elf_section_data (sec)->u.opd;
8027 opd->adjust = bfd_zalloc (sec->owner, amt);
8028 if (opd->adjust == NULL)
8029 return FALSE;
8030 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8031
8032 /* This seems a waste of time as input .opd sections are all
8033 zeros as generated by gcc, but I suppose there's no reason
8034 this will always be so. We might start putting something in
8035 the third word of .opd entries. */
8036 if ((sec->flags & SEC_IN_MEMORY) == 0)
8037 {
8038 bfd_byte *loc;
8039 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8040 {
8041 if (loc != NULL)
8042 free (loc);
8043 error_ret:
8044 if (local_syms != NULL
8045 && symtab_hdr->contents != (unsigned char *) local_syms)
8046 free (local_syms);
8047 if (elf_section_data (sec)->relocs != relstart)
8048 free (relstart);
8049 return FALSE;
8050 }
8051 sec->contents = loc;
8052 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8053 }
8054
8055 elf_section_data (sec)->relocs = relstart;
8056
8057 new_contents = sec->contents;
8058 if (add_aux_fields)
8059 {
8060 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8061 if (new_contents == NULL)
8062 return FALSE;
8063 need_pad = NULL;
8064 }
8065 wptr = new_contents;
8066 rptr = sec->contents;
8067 write_rel = relstart;
8068 for (rel = relstart; rel < relend; )
8069 {
8070 unsigned long r_symndx;
8071 asection *sym_sec;
8072 struct elf_link_hash_entry *h;
8073 struct ppc_link_hash_entry *fdh = NULL;
8074 Elf_Internal_Sym *sym;
8075 long opd_ent_size;
8076 Elf_Internal_Rela *next_rel;
8077 bfd_boolean skip;
8078
8079 r_symndx = ELF64_R_SYM (rel->r_info);
8080 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8081 r_symndx, ibfd))
8082 goto error_ret;
8083
8084 next_rel = rel + 2;
8085 if (next_rel + 1 == relend
8086 || (next_rel + 2 < relend
8087 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8088 ++next_rel;
8089
8090 /* See if the .opd entry is full 24 byte or
8091 16 byte (with fd_aux entry overlapped with next
8092 fd_func). */
8093 opd_ent_size = 24;
8094 if (next_rel == relend)
8095 {
8096 if (sec->size == rel->r_offset + 16)
8097 opd_ent_size = 16;
8098 }
8099 else if (next_rel->r_offset == rel->r_offset + 16)
8100 opd_ent_size = 16;
8101
8102 if (h != NULL
8103 && h->root.root.string[0] == '.')
8104 {
8105 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8106 if (fdh != NULL)
8107 {
8108 fdh = ppc_follow_link (fdh);
8109 if (fdh->elf.root.type != bfd_link_hash_defined
8110 && fdh->elf.root.type != bfd_link_hash_defweak)
8111 fdh = NULL;
8112 }
8113 }
8114
8115 skip = (sym_sec->owner != ibfd
8116 || sym_sec->output_section == bfd_abs_section_ptr);
8117 if (skip)
8118 {
8119 if (fdh != NULL && sym_sec->owner == ibfd)
8120 {
8121 /* Arrange for the function descriptor sym
8122 to be dropped. */
8123 fdh->elf.root.u.def.value = 0;
8124 fdh->elf.root.u.def.section = sym_sec;
8125 }
8126 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8127
8128 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8129 rel = next_rel;
8130 else
8131 while (1)
8132 {
8133 if (!dec_dynrel_count (rel->r_info, sec, info,
8134 NULL, h, sym))
8135 goto error_ret;
8136
8137 if (++rel == next_rel)
8138 break;
8139
8140 r_symndx = ELF64_R_SYM (rel->r_info);
8141 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8142 r_symndx, ibfd))
8143 goto error_ret;
8144 }
8145 }
8146 else
8147 {
8148 /* We'll be keeping this opd entry. */
8149 long adjust;
8150
8151 if (fdh != NULL)
8152 {
8153 /* Redefine the function descriptor symbol to
8154 this location in the opd section. It is
8155 necessary to update the value here rather
8156 than using an array of adjustments as we do
8157 for local symbols, because various places
8158 in the generic ELF code use the value
8159 stored in u.def.value. */
8160 fdh->elf.root.u.def.value = wptr - new_contents;
8161 fdh->adjust_done = 1;
8162 }
8163
8164 /* Local syms are a bit tricky. We could
8165 tweak them as they can be cached, but
8166 we'd need to look through the local syms
8167 for the function descriptor sym which we
8168 don't have at the moment. So keep an
8169 array of adjustments. */
8170 adjust = (wptr - new_contents) - (rptr - sec->contents);
8171 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8172
8173 if (wptr != rptr)
8174 memcpy (wptr, rptr, opd_ent_size);
8175 wptr += opd_ent_size;
8176 if (add_aux_fields && opd_ent_size == 16)
8177 {
8178 memset (wptr, '\0', 8);
8179 wptr += 8;
8180 }
8181
8182 /* We need to adjust any reloc offsets to point to the
8183 new opd entries. */
8184 for ( ; rel != next_rel; ++rel)
8185 {
8186 rel->r_offset += adjust;
8187 if (write_rel != rel)
8188 memcpy (write_rel, rel, sizeof (*rel));
8189 ++write_rel;
8190 }
8191 }
8192
8193 rptr += opd_ent_size;
8194 }
8195
8196 sec->size = wptr - new_contents;
8197 sec->reloc_count = write_rel - relstart;
8198 if (add_aux_fields)
8199 {
8200 free (sec->contents);
8201 sec->contents = new_contents;
8202 }
8203
8204 /* Fudge the header size too, as this is used later in
8205 elf_bfd_final_link if we are emitting relocs. */
8206 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8207 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8208 some_edited = TRUE;
8209 }
8210 else if (elf_section_data (sec)->relocs != relstart)
8211 free (relstart);
8212
8213 if (local_syms != NULL
8214 && symtab_hdr->contents != (unsigned char *) local_syms)
8215 {
8216 if (!info->keep_memory)
8217 free (local_syms);
8218 else
8219 symtab_hdr->contents = (unsigned char *) local_syms;
8220 }
8221 }
8222
8223 if (some_edited)
8224 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8225
8226 /* If we are doing a final link and the last .opd entry is just 16 byte
8227 long, add a 8 byte padding after it. */
8228 if (need_pad != NULL && !bfd_link_relocatable (info))
8229 {
8230 bfd_byte *p;
8231
8232 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8233 {
8234 BFD_ASSERT (need_pad->size > 0);
8235
8236 p = bfd_malloc (need_pad->size + 8);
8237 if (p == NULL)
8238 return FALSE;
8239
8240 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8241 p, 0, need_pad->size))
8242 return FALSE;
8243
8244 need_pad->contents = p;
8245 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8246 }
8247 else
8248 {
8249 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8250 if (p == NULL)
8251 return FALSE;
8252
8253 need_pad->contents = p;
8254 }
8255
8256 memset (need_pad->contents + need_pad->size, 0, 8);
8257 need_pad->size += 8;
8258 }
8259
8260 return TRUE;
8261 }
8262
8263 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8264
8265 asection *
8266 ppc64_elf_tls_setup (struct bfd_link_info *info)
8267 {
8268 struct ppc_link_hash_table *htab;
8269
8270 htab = ppc_hash_table (info);
8271 if (htab == NULL)
8272 return NULL;
8273
8274 if (abiversion (info->output_bfd) == 1)
8275 htab->opd_abi = 1;
8276
8277 if (htab->params->no_multi_toc)
8278 htab->do_multi_toc = 0;
8279 else if (!htab->do_multi_toc)
8280 htab->params->no_multi_toc = 1;
8281
8282 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8283 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8284 FALSE, FALSE, TRUE));
8285 /* Move dynamic linking info to the function descriptor sym. */
8286 if (htab->tls_get_addr != NULL)
8287 func_desc_adjust (&htab->tls_get_addr->elf, info);
8288 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8289 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8290 FALSE, FALSE, TRUE));
8291 if (htab->params->tls_get_addr_opt)
8292 {
8293 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8294
8295 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8296 FALSE, FALSE, TRUE);
8297 if (opt != NULL)
8298 func_desc_adjust (opt, info);
8299 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8300 FALSE, FALSE, TRUE);
8301 if (opt_fd != NULL
8302 && (opt_fd->root.type == bfd_link_hash_defined
8303 || opt_fd->root.type == bfd_link_hash_defweak))
8304 {
8305 /* If glibc supports an optimized __tls_get_addr call stub,
8306 signalled by the presence of __tls_get_addr_opt, and we'll
8307 be calling __tls_get_addr via a plt call stub, then
8308 make __tls_get_addr point to __tls_get_addr_opt. */
8309 tga_fd = &htab->tls_get_addr_fd->elf;
8310 if (htab->elf.dynamic_sections_created
8311 && tga_fd != NULL
8312 && (tga_fd->type == STT_FUNC
8313 || tga_fd->needs_plt)
8314 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8315 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8316 && tga_fd->root.type == bfd_link_hash_undefweak)))
8317 {
8318 struct plt_entry *ent;
8319
8320 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8321 if (ent->plt.refcount > 0)
8322 break;
8323 if (ent != NULL)
8324 {
8325 tga_fd->root.type = bfd_link_hash_indirect;
8326 tga_fd->root.u.i.link = &opt_fd->root;
8327 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8328 opt_fd->mark = 1;
8329 if (opt_fd->dynindx != -1)
8330 {
8331 /* Use __tls_get_addr_opt in dynamic relocations. */
8332 opt_fd->dynindx = -1;
8333 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8334 opt_fd->dynstr_index);
8335 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8336 return NULL;
8337 }
8338 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8339 tga = &htab->tls_get_addr->elf;
8340 if (opt != NULL && tga != NULL)
8341 {
8342 tga->root.type = bfd_link_hash_indirect;
8343 tga->root.u.i.link = &opt->root;
8344 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8345 opt->mark = 1;
8346 _bfd_elf_link_hash_hide_symbol (info, opt,
8347 tga->forced_local);
8348 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8349 }
8350 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8351 htab->tls_get_addr_fd->is_func_descriptor = 1;
8352 if (htab->tls_get_addr != NULL)
8353 {
8354 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8355 htab->tls_get_addr->is_func = 1;
8356 }
8357 }
8358 }
8359 }
8360 else if (htab->params->tls_get_addr_opt < 0)
8361 htab->params->tls_get_addr_opt = 0;
8362 }
8363 return _bfd_elf_tls_setup (info->output_bfd, info);
8364 }
8365
8366 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8367 HASH1 or HASH2. */
8368
8369 static bfd_boolean
8370 branch_reloc_hash_match (const bfd *ibfd,
8371 const Elf_Internal_Rela *rel,
8372 const struct ppc_link_hash_entry *hash1,
8373 const struct ppc_link_hash_entry *hash2)
8374 {
8375 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8376 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8377 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8378
8379 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8380 {
8381 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8382 struct elf_link_hash_entry *h;
8383
8384 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8385 h = elf_follow_link (h);
8386 if (h == &hash1->elf || h == &hash2->elf)
8387 return TRUE;
8388 }
8389 return FALSE;
8390 }
8391
8392 /* Run through all the TLS relocs looking for optimization
8393 opportunities. The linker has been hacked (see ppc64elf.em) to do
8394 a preliminary section layout so that we know the TLS segment
8395 offsets. We can't optimize earlier because some optimizations need
8396 to know the tp offset, and we need to optimize before allocating
8397 dynamic relocations. */
8398
8399 bfd_boolean
8400 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8401 {
8402 bfd *ibfd;
8403 asection *sec;
8404 struct ppc_link_hash_table *htab;
8405 unsigned char *toc_ref;
8406 int pass;
8407
8408 if (!bfd_link_executable (info))
8409 return TRUE;
8410
8411 htab = ppc_hash_table (info);
8412 if (htab == NULL)
8413 return FALSE;
8414
8415 /* Make two passes over the relocs. On the first pass, mark toc
8416 entries involved with tls relocs, and check that tls relocs
8417 involved in setting up a tls_get_addr call are indeed followed by
8418 such a call. If they are not, we can't do any tls optimization.
8419 On the second pass twiddle tls_mask flags to notify
8420 relocate_section that optimization can be done, and adjust got
8421 and plt refcounts. */
8422 toc_ref = NULL;
8423 for (pass = 0; pass < 2; ++pass)
8424 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8425 {
8426 Elf_Internal_Sym *locsyms = NULL;
8427 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8428
8429 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8430 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8431 {
8432 Elf_Internal_Rela *relstart, *rel, *relend;
8433 bfd_boolean found_tls_get_addr_arg = 0;
8434
8435 /* Read the relocations. */
8436 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8437 info->keep_memory);
8438 if (relstart == NULL)
8439 {
8440 free (toc_ref);
8441 return FALSE;
8442 }
8443
8444 relend = relstart + sec->reloc_count;
8445 for (rel = relstart; rel < relend; rel++)
8446 {
8447 enum elf_ppc64_reloc_type r_type;
8448 unsigned long r_symndx;
8449 struct elf_link_hash_entry *h;
8450 Elf_Internal_Sym *sym;
8451 asection *sym_sec;
8452 unsigned char *tls_mask;
8453 unsigned char tls_set, tls_clear, tls_type = 0;
8454 bfd_vma value;
8455 bfd_boolean ok_tprel, is_local;
8456 long toc_ref_index = 0;
8457 int expecting_tls_get_addr = 0;
8458 bfd_boolean ret = FALSE;
8459
8460 r_symndx = ELF64_R_SYM (rel->r_info);
8461 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8462 r_symndx, ibfd))
8463 {
8464 err_free_rel:
8465 if (elf_section_data (sec)->relocs != relstart)
8466 free (relstart);
8467 if (toc_ref != NULL)
8468 free (toc_ref);
8469 if (locsyms != NULL
8470 && (elf_symtab_hdr (ibfd).contents
8471 != (unsigned char *) locsyms))
8472 free (locsyms);
8473 return ret;
8474 }
8475
8476 if (h != NULL)
8477 {
8478 if (h->root.type == bfd_link_hash_defined
8479 || h->root.type == bfd_link_hash_defweak)
8480 value = h->root.u.def.value;
8481 else if (h->root.type == bfd_link_hash_undefweak)
8482 value = 0;
8483 else
8484 {
8485 found_tls_get_addr_arg = 0;
8486 continue;
8487 }
8488 }
8489 else
8490 /* Symbols referenced by TLS relocs must be of type
8491 STT_TLS. So no need for .opd local sym adjust. */
8492 value = sym->st_value;
8493
8494 ok_tprel = FALSE;
8495 is_local = FALSE;
8496 if (h == NULL
8497 || !h->def_dynamic)
8498 {
8499 is_local = TRUE;
8500 if (h != NULL
8501 && h->root.type == bfd_link_hash_undefweak)
8502 ok_tprel = TRUE;
8503 else if (sym_sec != NULL
8504 && sym_sec->output_section != NULL)
8505 {
8506 value += sym_sec->output_offset;
8507 value += sym_sec->output_section->vma;
8508 value -= htab->elf.tls_sec->vma;
8509 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8510 < (bfd_vma) 1 << 32);
8511 }
8512 }
8513
8514 r_type = ELF64_R_TYPE (rel->r_info);
8515 /* If this section has old-style __tls_get_addr calls
8516 without marker relocs, then check that each
8517 __tls_get_addr call reloc is preceded by a reloc
8518 that conceivably belongs to the __tls_get_addr arg
8519 setup insn. If we don't find matching arg setup
8520 relocs, don't do any tls optimization. */
8521 if (pass == 0
8522 && sec->has_tls_get_addr_call
8523 && h != NULL
8524 && (h == &htab->tls_get_addr->elf
8525 || h == &htab->tls_get_addr_fd->elf)
8526 && !found_tls_get_addr_arg
8527 && is_branch_reloc (r_type))
8528 {
8529 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8530 "TLS optimization disabled\n"),
8531 ibfd, sec, rel->r_offset);
8532 ret = TRUE;
8533 goto err_free_rel;
8534 }
8535
8536 found_tls_get_addr_arg = 0;
8537 switch (r_type)
8538 {
8539 case R_PPC64_GOT_TLSLD16:
8540 case R_PPC64_GOT_TLSLD16_LO:
8541 expecting_tls_get_addr = 1;
8542 found_tls_get_addr_arg = 1;
8543 /* Fall through. */
8544
8545 case R_PPC64_GOT_TLSLD16_HI:
8546 case R_PPC64_GOT_TLSLD16_HA:
8547 /* These relocs should never be against a symbol
8548 defined in a shared lib. Leave them alone if
8549 that turns out to be the case. */
8550 if (!is_local)
8551 continue;
8552
8553 /* LD -> LE */
8554 tls_set = 0;
8555 tls_clear = TLS_LD;
8556 tls_type = TLS_TLS | TLS_LD;
8557 break;
8558
8559 case R_PPC64_GOT_TLSGD16:
8560 case R_PPC64_GOT_TLSGD16_LO:
8561 expecting_tls_get_addr = 1;
8562 found_tls_get_addr_arg = 1;
8563 /* Fall through. */
8564
8565 case R_PPC64_GOT_TLSGD16_HI:
8566 case R_PPC64_GOT_TLSGD16_HA:
8567 if (ok_tprel)
8568 /* GD -> LE */
8569 tls_set = 0;
8570 else
8571 /* GD -> IE */
8572 tls_set = TLS_TLS | TLS_TPRELGD;
8573 tls_clear = TLS_GD;
8574 tls_type = TLS_TLS | TLS_GD;
8575 break;
8576
8577 case R_PPC64_GOT_TPREL16_DS:
8578 case R_PPC64_GOT_TPREL16_LO_DS:
8579 case R_PPC64_GOT_TPREL16_HI:
8580 case R_PPC64_GOT_TPREL16_HA:
8581 if (ok_tprel)
8582 {
8583 /* IE -> LE */
8584 tls_set = 0;
8585 tls_clear = TLS_TPREL;
8586 tls_type = TLS_TLS | TLS_TPREL;
8587 break;
8588 }
8589 continue;
8590
8591 case R_PPC64_TLSGD:
8592 case R_PPC64_TLSLD:
8593 found_tls_get_addr_arg = 1;
8594 /* Fall through. */
8595
8596 case R_PPC64_TLS:
8597 case R_PPC64_TOC16:
8598 case R_PPC64_TOC16_LO:
8599 if (sym_sec == NULL || sym_sec != toc)
8600 continue;
8601
8602 /* Mark this toc entry as referenced by a TLS
8603 code sequence. We can do that now in the
8604 case of R_PPC64_TLS, and after checking for
8605 tls_get_addr for the TOC16 relocs. */
8606 if (toc_ref == NULL)
8607 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8608 if (toc_ref == NULL)
8609 goto err_free_rel;
8610
8611 if (h != NULL)
8612 value = h->root.u.def.value;
8613 else
8614 value = sym->st_value;
8615 value += rel->r_addend;
8616 if (value % 8 != 0)
8617 continue;
8618 BFD_ASSERT (value < toc->size
8619 && toc->output_offset % 8 == 0);
8620 toc_ref_index = (value + toc->output_offset) / 8;
8621 if (r_type == R_PPC64_TLS
8622 || r_type == R_PPC64_TLSGD
8623 || r_type == R_PPC64_TLSLD)
8624 {
8625 toc_ref[toc_ref_index] = 1;
8626 continue;
8627 }
8628
8629 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8630 continue;
8631
8632 tls_set = 0;
8633 tls_clear = 0;
8634 expecting_tls_get_addr = 2;
8635 break;
8636
8637 case R_PPC64_TPREL64:
8638 if (pass == 0
8639 || sec != toc
8640 || toc_ref == NULL
8641 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8642 continue;
8643 if (ok_tprel)
8644 {
8645 /* IE -> LE */
8646 tls_set = TLS_EXPLICIT;
8647 tls_clear = TLS_TPREL;
8648 break;
8649 }
8650 continue;
8651
8652 case R_PPC64_DTPMOD64:
8653 if (pass == 0
8654 || sec != toc
8655 || toc_ref == NULL
8656 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8657 continue;
8658 if (rel + 1 < relend
8659 && (rel[1].r_info
8660 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8661 && rel[1].r_offset == rel->r_offset + 8)
8662 {
8663 if (ok_tprel)
8664 /* GD -> LE */
8665 tls_set = TLS_EXPLICIT | TLS_GD;
8666 else
8667 /* GD -> IE */
8668 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8669 tls_clear = TLS_GD;
8670 }
8671 else
8672 {
8673 if (!is_local)
8674 continue;
8675
8676 /* LD -> LE */
8677 tls_set = TLS_EXPLICIT;
8678 tls_clear = TLS_LD;
8679 }
8680 break;
8681
8682 default:
8683 continue;
8684 }
8685
8686 if (pass == 0)
8687 {
8688 if (!expecting_tls_get_addr
8689 || !sec->has_tls_get_addr_call)
8690 continue;
8691
8692 if (rel + 1 < relend
8693 && branch_reloc_hash_match (ibfd, rel + 1,
8694 htab->tls_get_addr,
8695 htab->tls_get_addr_fd))
8696 {
8697 if (expecting_tls_get_addr == 2)
8698 {
8699 /* Check for toc tls entries. */
8700 unsigned char *toc_tls;
8701 int retval;
8702
8703 retval = get_tls_mask (&toc_tls, NULL, NULL,
8704 &locsyms,
8705 rel, ibfd);
8706 if (retval == 0)
8707 goto err_free_rel;
8708 if (toc_tls != NULL)
8709 {
8710 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8711 found_tls_get_addr_arg = 1;
8712 if (retval > 1)
8713 toc_ref[toc_ref_index] = 1;
8714 }
8715 }
8716 continue;
8717 }
8718
8719 if (expecting_tls_get_addr != 1)
8720 continue;
8721
8722 /* Uh oh, we didn't find the expected call. We
8723 could just mark this symbol to exclude it
8724 from tls optimization but it's safer to skip
8725 the entire optimization. */
8726 /* xgettext:c-format */
8727 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8728 "TLS optimization disabled\n"),
8729 ibfd, sec, rel->r_offset);
8730 ret = TRUE;
8731 goto err_free_rel;
8732 }
8733
8734 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8735 {
8736 struct plt_entry *ent;
8737 for (ent = htab->tls_get_addr->elf.plt.plist;
8738 ent != NULL;
8739 ent = ent->next)
8740 if (ent->addend == 0)
8741 {
8742 if (ent->plt.refcount > 0)
8743 {
8744 ent->plt.refcount -= 1;
8745 expecting_tls_get_addr = 0;
8746 }
8747 break;
8748 }
8749 }
8750
8751 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8752 {
8753 struct plt_entry *ent;
8754 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8755 ent != NULL;
8756 ent = ent->next)
8757 if (ent->addend == 0)
8758 {
8759 if (ent->plt.refcount > 0)
8760 ent->plt.refcount -= 1;
8761 break;
8762 }
8763 }
8764
8765 if (tls_clear == 0)
8766 continue;
8767
8768 if ((tls_set & TLS_EXPLICIT) == 0)
8769 {
8770 struct got_entry *ent;
8771
8772 /* Adjust got entry for this reloc. */
8773 if (h != NULL)
8774 ent = h->got.glist;
8775 else
8776 ent = elf_local_got_ents (ibfd)[r_symndx];
8777
8778 for (; ent != NULL; ent = ent->next)
8779 if (ent->addend == rel->r_addend
8780 && ent->owner == ibfd
8781 && ent->tls_type == tls_type)
8782 break;
8783 if (ent == NULL)
8784 abort ();
8785
8786 if (tls_set == 0)
8787 {
8788 /* We managed to get rid of a got entry. */
8789 if (ent->got.refcount > 0)
8790 ent->got.refcount -= 1;
8791 }
8792 }
8793 else
8794 {
8795 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8796 we'll lose one or two dyn relocs. */
8797 if (!dec_dynrel_count (rel->r_info, sec, info,
8798 NULL, h, sym))
8799 return FALSE;
8800
8801 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8802 {
8803 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8804 NULL, h, sym))
8805 return FALSE;
8806 }
8807 }
8808
8809 *tls_mask |= tls_set;
8810 *tls_mask &= ~tls_clear;
8811 }
8812
8813 if (elf_section_data (sec)->relocs != relstart)
8814 free (relstart);
8815 }
8816
8817 if (locsyms != NULL
8818 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8819 {
8820 if (!info->keep_memory)
8821 free (locsyms);
8822 else
8823 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8824 }
8825 }
8826
8827 if (toc_ref != NULL)
8828 free (toc_ref);
8829 return TRUE;
8830 }
8831
8832 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8833 the values of any global symbols in a toc section that has been
8834 edited. Globals in toc sections should be a rarity, so this function
8835 sets a flag if any are found in toc sections other than the one just
8836 edited, so that futher hash table traversals can be avoided. */
8837
8838 struct adjust_toc_info
8839 {
8840 asection *toc;
8841 unsigned long *skip;
8842 bfd_boolean global_toc_syms;
8843 };
8844
8845 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8846
8847 static bfd_boolean
8848 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8849 {
8850 struct ppc_link_hash_entry *eh;
8851 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8852 unsigned long i;
8853
8854 if (h->root.type != bfd_link_hash_defined
8855 && h->root.type != bfd_link_hash_defweak)
8856 return TRUE;
8857
8858 eh = (struct ppc_link_hash_entry *) h;
8859 if (eh->adjust_done)
8860 return TRUE;
8861
8862 if (eh->elf.root.u.def.section == toc_inf->toc)
8863 {
8864 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8865 i = toc_inf->toc->rawsize >> 3;
8866 else
8867 i = eh->elf.root.u.def.value >> 3;
8868
8869 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8870 {
8871 _bfd_error_handler
8872 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8873 do
8874 ++i;
8875 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8876 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8877 }
8878
8879 eh->elf.root.u.def.value -= toc_inf->skip[i];
8880 eh->adjust_done = 1;
8881 }
8882 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8883 toc_inf->global_toc_syms = TRUE;
8884
8885 return TRUE;
8886 }
8887
8888 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8889 on a _LO variety toc/got reloc. */
8890
8891 static bfd_boolean
8892 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8893 {
8894 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8895 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8896 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8897 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8898 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8899 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8900 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8901 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8902 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8903 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8904 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8905 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8906 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8907 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8908 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8909 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8910 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8911 /* Exclude lfqu by testing reloc. If relocs are ever
8912 defined for the reduced D field in psq_lu then those
8913 will need testing too. */
8914 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8915 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8916 && (insn & 1) == 0)
8917 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8918 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8919 /* Exclude stfqu. psq_stu as above for psq_lu. */
8920 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8921 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8922 && (insn & 1) == 0));
8923 }
8924
8925 /* Examine all relocs referencing .toc sections in order to remove
8926 unused .toc entries. */
8927
8928 bfd_boolean
8929 ppc64_elf_edit_toc (struct bfd_link_info *info)
8930 {
8931 bfd *ibfd;
8932 struct adjust_toc_info toc_inf;
8933 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8934
8935 htab->do_toc_opt = 1;
8936 toc_inf.global_toc_syms = TRUE;
8937 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8938 {
8939 asection *toc, *sec;
8940 Elf_Internal_Shdr *symtab_hdr;
8941 Elf_Internal_Sym *local_syms;
8942 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8943 unsigned long *skip, *drop;
8944 unsigned char *used;
8945 unsigned char *keep, last, some_unused;
8946
8947 if (!is_ppc64_elf (ibfd))
8948 continue;
8949
8950 toc = bfd_get_section_by_name (ibfd, ".toc");
8951 if (toc == NULL
8952 || toc->size == 0
8953 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8954 || discarded_section (toc))
8955 continue;
8956
8957 toc_relocs = NULL;
8958 local_syms = NULL;
8959 symtab_hdr = &elf_symtab_hdr (ibfd);
8960
8961 /* Look at sections dropped from the final link. */
8962 skip = NULL;
8963 relstart = NULL;
8964 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8965 {
8966 if (sec->reloc_count == 0
8967 || !discarded_section (sec)
8968 || get_opd_info (sec)
8969 || (sec->flags & SEC_ALLOC) == 0
8970 || (sec->flags & SEC_DEBUGGING) != 0)
8971 continue;
8972
8973 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8974 if (relstart == NULL)
8975 goto error_ret;
8976
8977 /* Run through the relocs to see which toc entries might be
8978 unused. */
8979 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8980 {
8981 enum elf_ppc64_reloc_type r_type;
8982 unsigned long r_symndx;
8983 asection *sym_sec;
8984 struct elf_link_hash_entry *h;
8985 Elf_Internal_Sym *sym;
8986 bfd_vma val;
8987
8988 r_type = ELF64_R_TYPE (rel->r_info);
8989 switch (r_type)
8990 {
8991 default:
8992 continue;
8993
8994 case R_PPC64_TOC16:
8995 case R_PPC64_TOC16_LO:
8996 case R_PPC64_TOC16_HI:
8997 case R_PPC64_TOC16_HA:
8998 case R_PPC64_TOC16_DS:
8999 case R_PPC64_TOC16_LO_DS:
9000 break;
9001 }
9002
9003 r_symndx = ELF64_R_SYM (rel->r_info);
9004 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9005 r_symndx, ibfd))
9006 goto error_ret;
9007
9008 if (sym_sec != toc)
9009 continue;
9010
9011 if (h != NULL)
9012 val = h->root.u.def.value;
9013 else
9014 val = sym->st_value;
9015 val += rel->r_addend;
9016
9017 if (val >= toc->size)
9018 continue;
9019
9020 /* Anything in the toc ought to be aligned to 8 bytes.
9021 If not, don't mark as unused. */
9022 if (val & 7)
9023 continue;
9024
9025 if (skip == NULL)
9026 {
9027 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9028 if (skip == NULL)
9029 goto error_ret;
9030 }
9031
9032 skip[val >> 3] = ref_from_discarded;
9033 }
9034
9035 if (elf_section_data (sec)->relocs != relstart)
9036 free (relstart);
9037 }
9038
9039 /* For largetoc loads of address constants, we can convert
9040 . addis rx,2,addr@got@ha
9041 . ld ry,addr@got@l(rx)
9042 to
9043 . addis rx,2,addr@toc@ha
9044 . addi ry,rx,addr@toc@l
9045 when addr is within 2G of the toc pointer. This then means
9046 that the word storing "addr" in the toc is no longer needed. */
9047
9048 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9049 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9050 && toc->reloc_count != 0)
9051 {
9052 /* Read toc relocs. */
9053 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9054 info->keep_memory);
9055 if (toc_relocs == NULL)
9056 goto error_ret;
9057
9058 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9059 {
9060 enum elf_ppc64_reloc_type r_type;
9061 unsigned long r_symndx;
9062 asection *sym_sec;
9063 struct elf_link_hash_entry *h;
9064 Elf_Internal_Sym *sym;
9065 bfd_vma val, addr;
9066
9067 r_type = ELF64_R_TYPE (rel->r_info);
9068 if (r_type != R_PPC64_ADDR64)
9069 continue;
9070
9071 r_symndx = ELF64_R_SYM (rel->r_info);
9072 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9073 r_symndx, ibfd))
9074 goto error_ret;
9075
9076 if (sym_sec == NULL
9077 || sym_sec->output_section == NULL
9078 || discarded_section (sym_sec))
9079 continue;
9080
9081 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9082 continue;
9083
9084 if (h != NULL)
9085 {
9086 if (h->type == STT_GNU_IFUNC)
9087 continue;
9088 val = h->root.u.def.value;
9089 }
9090 else
9091 {
9092 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9093 continue;
9094 val = sym->st_value;
9095 }
9096 val += rel->r_addend;
9097 val += sym_sec->output_section->vma + sym_sec->output_offset;
9098
9099 /* We don't yet know the exact toc pointer value, but we
9100 know it will be somewhere in the toc section. Don't
9101 optimize if the difference from any possible toc
9102 pointer is outside [ff..f80008000, 7fff7fff]. */
9103 addr = toc->output_section->vma + TOC_BASE_OFF;
9104 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9105 continue;
9106
9107 addr = toc->output_section->vma + toc->output_section->rawsize;
9108 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9109 continue;
9110
9111 if (skip == NULL)
9112 {
9113 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9114 if (skip == NULL)
9115 goto error_ret;
9116 }
9117
9118 skip[rel->r_offset >> 3]
9119 |= can_optimize | ((rel - toc_relocs) << 2);
9120 }
9121 }
9122
9123 if (skip == NULL)
9124 continue;
9125
9126 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9127 if (used == NULL)
9128 {
9129 error_ret:
9130 if (local_syms != NULL
9131 && symtab_hdr->contents != (unsigned char *) local_syms)
9132 free (local_syms);
9133 if (sec != NULL
9134 && relstart != NULL
9135 && elf_section_data (sec)->relocs != relstart)
9136 free (relstart);
9137 if (toc_relocs != NULL
9138 && elf_section_data (toc)->relocs != toc_relocs)
9139 free (toc_relocs);
9140 if (skip != NULL)
9141 free (skip);
9142 return FALSE;
9143 }
9144
9145 /* Now check all kept sections that might reference the toc.
9146 Check the toc itself last. */
9147 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9148 : ibfd->sections);
9149 sec != NULL;
9150 sec = (sec == toc ? NULL
9151 : sec->next == NULL ? toc
9152 : sec->next == toc && toc->next ? toc->next
9153 : sec->next))
9154 {
9155 int repeat;
9156
9157 if (sec->reloc_count == 0
9158 || discarded_section (sec)
9159 || get_opd_info (sec)
9160 || (sec->flags & SEC_ALLOC) == 0
9161 || (sec->flags & SEC_DEBUGGING) != 0)
9162 continue;
9163
9164 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9165 info->keep_memory);
9166 if (relstart == NULL)
9167 {
9168 free (used);
9169 goto error_ret;
9170 }
9171
9172 /* Mark toc entries referenced as used. */
9173 do
9174 {
9175 repeat = 0;
9176 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9177 {
9178 enum elf_ppc64_reloc_type r_type;
9179 unsigned long r_symndx;
9180 asection *sym_sec;
9181 struct elf_link_hash_entry *h;
9182 Elf_Internal_Sym *sym;
9183 bfd_vma val;
9184 enum {no_check, check_lo, check_ha} insn_check;
9185
9186 r_type = ELF64_R_TYPE (rel->r_info);
9187 switch (r_type)
9188 {
9189 default:
9190 insn_check = no_check;
9191 break;
9192
9193 case R_PPC64_GOT_TLSLD16_HA:
9194 case R_PPC64_GOT_TLSGD16_HA:
9195 case R_PPC64_GOT_TPREL16_HA:
9196 case R_PPC64_GOT_DTPREL16_HA:
9197 case R_PPC64_GOT16_HA:
9198 case R_PPC64_TOC16_HA:
9199 insn_check = check_ha;
9200 break;
9201
9202 case R_PPC64_GOT_TLSLD16_LO:
9203 case R_PPC64_GOT_TLSGD16_LO:
9204 case R_PPC64_GOT_TPREL16_LO_DS:
9205 case R_PPC64_GOT_DTPREL16_LO_DS:
9206 case R_PPC64_GOT16_LO:
9207 case R_PPC64_GOT16_LO_DS:
9208 case R_PPC64_TOC16_LO:
9209 case R_PPC64_TOC16_LO_DS:
9210 insn_check = check_lo;
9211 break;
9212 }
9213
9214 if (insn_check != no_check)
9215 {
9216 bfd_vma off = rel->r_offset & ~3;
9217 unsigned char buf[4];
9218 unsigned int insn;
9219
9220 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9221 {
9222 free (used);
9223 goto error_ret;
9224 }
9225 insn = bfd_get_32 (ibfd, buf);
9226 if (insn_check == check_lo
9227 ? !ok_lo_toc_insn (insn, r_type)
9228 : ((insn & ((0x3f << 26) | 0x1f << 16))
9229 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9230 {
9231 char str[12];
9232
9233 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9234 sprintf (str, "%#08x", insn);
9235 info->callbacks->einfo
9236 /* xgettext:c-format */
9237 (_("%H: toc optimization is not supported for"
9238 " %s instruction.\n"),
9239 ibfd, sec, rel->r_offset & ~3, str);
9240 }
9241 }
9242
9243 switch (r_type)
9244 {
9245 case R_PPC64_TOC16:
9246 case R_PPC64_TOC16_LO:
9247 case R_PPC64_TOC16_HI:
9248 case R_PPC64_TOC16_HA:
9249 case R_PPC64_TOC16_DS:
9250 case R_PPC64_TOC16_LO_DS:
9251 /* In case we're taking addresses of toc entries. */
9252 case R_PPC64_ADDR64:
9253 break;
9254
9255 default:
9256 continue;
9257 }
9258
9259 r_symndx = ELF64_R_SYM (rel->r_info);
9260 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9261 r_symndx, ibfd))
9262 {
9263 free (used);
9264 goto error_ret;
9265 }
9266
9267 if (sym_sec != toc)
9268 continue;
9269
9270 if (h != NULL)
9271 val = h->root.u.def.value;
9272 else
9273 val = sym->st_value;
9274 val += rel->r_addend;
9275
9276 if (val >= toc->size)
9277 continue;
9278
9279 if ((skip[val >> 3] & can_optimize) != 0)
9280 {
9281 bfd_vma off;
9282 unsigned char opc;
9283
9284 switch (r_type)
9285 {
9286 case R_PPC64_TOC16_HA:
9287 break;
9288
9289 case R_PPC64_TOC16_LO_DS:
9290 off = rel->r_offset;
9291 off += (bfd_big_endian (ibfd) ? -2 : 3);
9292 if (!bfd_get_section_contents (ibfd, sec, &opc,
9293 off, 1))
9294 {
9295 free (used);
9296 goto error_ret;
9297 }
9298 if ((opc & (0x3f << 2)) == (58u << 2))
9299 break;
9300 /* Fall through. */
9301
9302 default:
9303 /* Wrong sort of reloc, or not a ld. We may
9304 as well clear ref_from_discarded too. */
9305 skip[val >> 3] = 0;
9306 }
9307 }
9308
9309 if (sec != toc)
9310 used[val >> 3] = 1;
9311 /* For the toc section, we only mark as used if this
9312 entry itself isn't unused. */
9313 else if ((used[rel->r_offset >> 3]
9314 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9315 && !used[val >> 3])
9316 {
9317 /* Do all the relocs again, to catch reference
9318 chains. */
9319 repeat = 1;
9320 used[val >> 3] = 1;
9321 }
9322 }
9323 }
9324 while (repeat);
9325
9326 if (elf_section_data (sec)->relocs != relstart)
9327 free (relstart);
9328 }
9329
9330 /* Merge the used and skip arrays. Assume that TOC
9331 doublewords not appearing as either used or unused belong
9332 to to an entry more than one doubleword in size. */
9333 for (drop = skip, keep = used, last = 0, some_unused = 0;
9334 drop < skip + (toc->size + 7) / 8;
9335 ++drop, ++keep)
9336 {
9337 if (*keep)
9338 {
9339 *drop &= ~ref_from_discarded;
9340 if ((*drop & can_optimize) != 0)
9341 some_unused = 1;
9342 last = 0;
9343 }
9344 else if ((*drop & ref_from_discarded) != 0)
9345 {
9346 some_unused = 1;
9347 last = ref_from_discarded;
9348 }
9349 else
9350 *drop = last;
9351 }
9352
9353 free (used);
9354
9355 if (some_unused)
9356 {
9357 bfd_byte *contents, *src;
9358 unsigned long off;
9359 Elf_Internal_Sym *sym;
9360 bfd_boolean local_toc_syms = FALSE;
9361
9362 /* Shuffle the toc contents, and at the same time convert the
9363 skip array from booleans into offsets. */
9364 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9365 goto error_ret;
9366
9367 elf_section_data (toc)->this_hdr.contents = contents;
9368
9369 for (src = contents, off = 0, drop = skip;
9370 src < contents + toc->size;
9371 src += 8, ++drop)
9372 {
9373 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9374 off += 8;
9375 else if (off != 0)
9376 {
9377 *drop = off;
9378 memcpy (src - off, src, 8);
9379 }
9380 }
9381 *drop = off;
9382 toc->rawsize = toc->size;
9383 toc->size = src - contents - off;
9384
9385 /* Adjust addends for relocs against the toc section sym,
9386 and optimize any accesses we can. */
9387 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9388 {
9389 if (sec->reloc_count == 0
9390 || discarded_section (sec))
9391 continue;
9392
9393 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9394 info->keep_memory);
9395 if (relstart == NULL)
9396 goto error_ret;
9397
9398 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9399 {
9400 enum elf_ppc64_reloc_type r_type;
9401 unsigned long r_symndx;
9402 asection *sym_sec;
9403 struct elf_link_hash_entry *h;
9404 bfd_vma val;
9405
9406 r_type = ELF64_R_TYPE (rel->r_info);
9407 switch (r_type)
9408 {
9409 default:
9410 continue;
9411
9412 case R_PPC64_TOC16:
9413 case R_PPC64_TOC16_LO:
9414 case R_PPC64_TOC16_HI:
9415 case R_PPC64_TOC16_HA:
9416 case R_PPC64_TOC16_DS:
9417 case R_PPC64_TOC16_LO_DS:
9418 case R_PPC64_ADDR64:
9419 break;
9420 }
9421
9422 r_symndx = ELF64_R_SYM (rel->r_info);
9423 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9424 r_symndx, ibfd))
9425 goto error_ret;
9426
9427 if (sym_sec != toc)
9428 continue;
9429
9430 if (h != NULL)
9431 val = h->root.u.def.value;
9432 else
9433 {
9434 val = sym->st_value;
9435 if (val != 0)
9436 local_toc_syms = TRUE;
9437 }
9438
9439 val += rel->r_addend;
9440
9441 if (val > toc->rawsize)
9442 val = toc->rawsize;
9443 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9444 continue;
9445 else if ((skip[val >> 3] & can_optimize) != 0)
9446 {
9447 Elf_Internal_Rela *tocrel
9448 = toc_relocs + (skip[val >> 3] >> 2);
9449 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9450
9451 switch (r_type)
9452 {
9453 case R_PPC64_TOC16_HA:
9454 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9455 break;
9456
9457 case R_PPC64_TOC16_LO_DS:
9458 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9459 break;
9460
9461 default:
9462 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9463 ppc_howto_init ();
9464 info->callbacks->einfo
9465 /* xgettext:c-format */
9466 (_("%H: %s references "
9467 "optimized away TOC entry\n"),
9468 ibfd, sec, rel->r_offset,
9469 ppc64_elf_howto_table[r_type]->name);
9470 bfd_set_error (bfd_error_bad_value);
9471 goto error_ret;
9472 }
9473 rel->r_addend = tocrel->r_addend;
9474 elf_section_data (sec)->relocs = relstart;
9475 continue;
9476 }
9477
9478 if (h != NULL || sym->st_value != 0)
9479 continue;
9480
9481 rel->r_addend -= skip[val >> 3];
9482 elf_section_data (sec)->relocs = relstart;
9483 }
9484
9485 if (elf_section_data (sec)->relocs != relstart)
9486 free (relstart);
9487 }
9488
9489 /* We shouldn't have local or global symbols defined in the TOC,
9490 but handle them anyway. */
9491 if (local_syms != NULL)
9492 for (sym = local_syms;
9493 sym < local_syms + symtab_hdr->sh_info;
9494 ++sym)
9495 if (sym->st_value != 0
9496 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9497 {
9498 unsigned long i;
9499
9500 if (sym->st_value > toc->rawsize)
9501 i = toc->rawsize >> 3;
9502 else
9503 i = sym->st_value >> 3;
9504
9505 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9506 {
9507 if (local_toc_syms)
9508 _bfd_error_handler
9509 (_("%s defined on removed toc entry"),
9510 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9511 do
9512 ++i;
9513 while ((skip[i] & (ref_from_discarded | can_optimize)));
9514 sym->st_value = (bfd_vma) i << 3;
9515 }
9516
9517 sym->st_value -= skip[i];
9518 symtab_hdr->contents = (unsigned char *) local_syms;
9519 }
9520
9521 /* Adjust any global syms defined in this toc input section. */
9522 if (toc_inf.global_toc_syms)
9523 {
9524 toc_inf.toc = toc;
9525 toc_inf.skip = skip;
9526 toc_inf.global_toc_syms = FALSE;
9527 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9528 &toc_inf);
9529 }
9530
9531 if (toc->reloc_count != 0)
9532 {
9533 Elf_Internal_Shdr *rel_hdr;
9534 Elf_Internal_Rela *wrel;
9535 bfd_size_type sz;
9536
9537 /* Remove unused toc relocs, and adjust those we keep. */
9538 if (toc_relocs == NULL)
9539 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9540 info->keep_memory);
9541 if (toc_relocs == NULL)
9542 goto error_ret;
9543
9544 wrel = toc_relocs;
9545 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9546 if ((skip[rel->r_offset >> 3]
9547 & (ref_from_discarded | can_optimize)) == 0)
9548 {
9549 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9550 wrel->r_info = rel->r_info;
9551 wrel->r_addend = rel->r_addend;
9552 ++wrel;
9553 }
9554 else if (!dec_dynrel_count (rel->r_info, toc, info,
9555 &local_syms, NULL, NULL))
9556 goto error_ret;
9557
9558 elf_section_data (toc)->relocs = toc_relocs;
9559 toc->reloc_count = wrel - toc_relocs;
9560 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9561 sz = rel_hdr->sh_entsize;
9562 rel_hdr->sh_size = toc->reloc_count * sz;
9563 }
9564 }
9565 else if (toc_relocs != NULL
9566 && elf_section_data (toc)->relocs != toc_relocs)
9567 free (toc_relocs);
9568
9569 if (local_syms != NULL
9570 && symtab_hdr->contents != (unsigned char *) local_syms)
9571 {
9572 if (!info->keep_memory)
9573 free (local_syms);
9574 else
9575 symtab_hdr->contents = (unsigned char *) local_syms;
9576 }
9577 free (skip);
9578 }
9579
9580 return TRUE;
9581 }
9582
9583 /* Return true iff input section I references the TOC using
9584 instructions limited to +/-32k offsets. */
9585
9586 bfd_boolean
9587 ppc64_elf_has_small_toc_reloc (asection *i)
9588 {
9589 return (is_ppc64_elf (i->owner)
9590 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9591 }
9592
9593 /* Allocate space for one GOT entry. */
9594
9595 static void
9596 allocate_got (struct elf_link_hash_entry *h,
9597 struct bfd_link_info *info,
9598 struct got_entry *gent)
9599 {
9600 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9601 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9602 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9603 ? 16 : 8);
9604 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9605 ? 2 : 1) * sizeof (Elf64_External_Rela);
9606 asection *got = ppc64_elf_tdata (gent->owner)->got;
9607
9608 gent->got.offset = got->size;
9609 got->size += entsize;
9610
9611 if (h->type == STT_GNU_IFUNC)
9612 {
9613 htab->elf.irelplt->size += rentsize;
9614 htab->got_reli_size += rentsize;
9615 }
9616 else if ((bfd_link_pic (info)
9617 || (htab->elf.dynamic_sections_created
9618 && h->dynindx != -1
9619 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9620 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9621 || h->root.type != bfd_link_hash_undefweak))
9622 {
9623 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9624 relgot->size += rentsize;
9625 }
9626 }
9627
9628 /* This function merges got entries in the same toc group. */
9629
9630 static void
9631 merge_got_entries (struct got_entry **pent)
9632 {
9633 struct got_entry *ent, *ent2;
9634
9635 for (ent = *pent; ent != NULL; ent = ent->next)
9636 if (!ent->is_indirect)
9637 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9638 if (!ent2->is_indirect
9639 && ent2->addend == ent->addend
9640 && ent2->tls_type == ent->tls_type
9641 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9642 {
9643 ent2->is_indirect = TRUE;
9644 ent2->got.ent = ent;
9645 }
9646 }
9647
9648 /* If H is undefined weak, make it dynamic if that makes sense. */
9649
9650 static bfd_boolean
9651 ensure_undefweak_dynamic (struct bfd_link_info *info,
9652 struct elf_link_hash_entry *h)
9653 {
9654 struct elf_link_hash_table *htab = elf_hash_table (info);
9655
9656 if (htab->dynamic_sections_created
9657 && h->root.type == bfd_link_hash_undefweak
9658 && h->dynindx == -1
9659 && !h->forced_local
9660 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9661 return bfd_elf_link_record_dynamic_symbol (info, h);
9662 return TRUE;
9663 }
9664
9665 /* Allocate space in .plt, .got and associated reloc sections for
9666 dynamic relocs. */
9667
9668 static bfd_boolean
9669 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9670 {
9671 struct bfd_link_info *info;
9672 struct ppc_link_hash_table *htab;
9673 asection *s;
9674 struct ppc_link_hash_entry *eh;
9675 struct got_entry **pgent, *gent;
9676
9677 if (h->root.type == bfd_link_hash_indirect)
9678 return TRUE;
9679
9680 info = (struct bfd_link_info *) inf;
9681 htab = ppc_hash_table (info);
9682 if (htab == NULL)
9683 return FALSE;
9684
9685 eh = (struct ppc_link_hash_entry *) h;
9686 /* Run through the TLS GD got entries first if we're changing them
9687 to TPREL. */
9688 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9689 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9690 if (gent->got.refcount > 0
9691 && (gent->tls_type & TLS_GD) != 0)
9692 {
9693 /* This was a GD entry that has been converted to TPREL. If
9694 there happens to be a TPREL entry we can use that one. */
9695 struct got_entry *ent;
9696 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9697 if (ent->got.refcount > 0
9698 && (ent->tls_type & TLS_TPREL) != 0
9699 && ent->addend == gent->addend
9700 && ent->owner == gent->owner)
9701 {
9702 gent->got.refcount = 0;
9703 break;
9704 }
9705
9706 /* If not, then we'll be using our own TPREL entry. */
9707 if (gent->got.refcount != 0)
9708 gent->tls_type = TLS_TLS | TLS_TPREL;
9709 }
9710
9711 /* Remove any list entry that won't generate a word in the GOT before
9712 we call merge_got_entries. Otherwise we risk merging to empty
9713 entries. */
9714 pgent = &h->got.glist;
9715 while ((gent = *pgent) != NULL)
9716 if (gent->got.refcount > 0)
9717 {
9718 if ((gent->tls_type & TLS_LD) != 0
9719 && !h->def_dynamic)
9720 {
9721 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9722 *pgent = gent->next;
9723 }
9724 else
9725 pgent = &gent->next;
9726 }
9727 else
9728 *pgent = gent->next;
9729
9730 if (!htab->do_multi_toc)
9731 merge_got_entries (&h->got.glist);
9732
9733 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9734 if (!gent->is_indirect)
9735 {
9736 /* Make sure this symbol is output as a dynamic symbol.
9737 Undefined weak syms won't yet be marked as dynamic. */
9738 if (!ensure_undefweak_dynamic (info, h))
9739 return FALSE;
9740
9741 if (!is_ppc64_elf (gent->owner))
9742 abort ();
9743
9744 allocate_got (h, info, gent);
9745 }
9746
9747 if (!htab->elf.dynamic_sections_created
9748 && h->type != STT_GNU_IFUNC)
9749 eh->dyn_relocs = NULL;
9750
9751 if (eh->dyn_relocs != NULL)
9752 {
9753 struct elf_dyn_relocs *p, **pp;
9754
9755 /* In the shared -Bsymbolic case, discard space allocated for
9756 dynamic pc-relative relocs against symbols which turn out to
9757 be defined in regular objects. For the normal shared case,
9758 discard space for relocs that have become local due to symbol
9759 visibility changes. */
9760
9761 if (bfd_link_pic (info))
9762 {
9763 /* Relocs that use pc_count are those that appear on a call
9764 insn, or certain REL relocs (see must_be_dyn_reloc) that
9765 can be generated via assembly. We want calls to
9766 protected symbols to resolve directly to the function
9767 rather than going via the plt. If people want function
9768 pointer comparisons to work as expected then they should
9769 avoid writing weird assembly. */
9770 if (SYMBOL_CALLS_LOCAL (info, h))
9771 {
9772 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9773 {
9774 p->count -= p->pc_count;
9775 p->pc_count = 0;
9776 if (p->count == 0)
9777 *pp = p->next;
9778 else
9779 pp = &p->next;
9780 }
9781 }
9782
9783 /* Also discard relocs on undefined weak syms with
9784 non-default visibility. */
9785 if (eh->dyn_relocs != NULL
9786 && h->root.type == bfd_link_hash_undefweak)
9787 {
9788 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9789 eh->dyn_relocs = NULL;
9790
9791 /* Make sure this symbol is output as a dynamic symbol.
9792 Undefined weak syms won't yet be marked as dynamic. */
9793 else if (!ensure_undefweak_dynamic (info, h))
9794 return FALSE;
9795 }
9796 }
9797 else if (h->type == STT_GNU_IFUNC)
9798 {
9799 /* A plt entry is always created when making direct calls to
9800 an ifunc, even when building a static executable, but
9801 that doesn't cover all cases. We may have only an ifunc
9802 initialised function pointer for a given ifunc symbol.
9803
9804 For ELFv2, dynamic relocations are not required when
9805 generating a global entry PLT stub. */
9806 if (abiversion (info->output_bfd) >= 2)
9807 {
9808 if (global_entry_stub (h))
9809 eh->dyn_relocs = NULL;
9810 }
9811
9812 /* For ELFv1 we have function descriptors. Descriptors need
9813 to be treated like PLT entries and thus have dynamic
9814 relocations. One exception is when the function
9815 descriptor is copied into .dynbss (which should only
9816 happen with ancient versions of gcc). */
9817 else if (h->needs_copy)
9818 eh->dyn_relocs = NULL;
9819 }
9820 else if (ELIMINATE_COPY_RELOCS)
9821 {
9822 /* For the non-pic case, discard space for relocs against
9823 symbols which turn out to need copy relocs or are not
9824 dynamic. */
9825 if (!h->non_got_ref
9826 && !h->def_regular)
9827 {
9828 /* Make sure this symbol is output as a dynamic symbol.
9829 Undefined weak syms won't yet be marked as dynamic. */
9830 if (!ensure_undefweak_dynamic (info, h))
9831 return FALSE;
9832
9833 if (h->dynindx == -1)
9834 eh->dyn_relocs = NULL;
9835 }
9836 else
9837 eh->dyn_relocs = NULL;
9838 }
9839
9840 /* Finally, allocate space. */
9841 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9842 {
9843 asection *sreloc = elf_section_data (p->sec)->sreloc;
9844 if (eh->elf.type == STT_GNU_IFUNC)
9845 sreloc = htab->elf.irelplt;
9846 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9847 }
9848 }
9849
9850 if ((htab->elf.dynamic_sections_created
9851 && h->dynindx != -1)
9852 || h->type == STT_GNU_IFUNC)
9853 {
9854 struct plt_entry *pent;
9855 bfd_boolean doneone = FALSE;
9856 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9857 if (pent->plt.refcount > 0)
9858 {
9859 if (!htab->elf.dynamic_sections_created
9860 || h->dynindx == -1)
9861 {
9862 s = htab->elf.iplt;
9863 pent->plt.offset = s->size;
9864 s->size += PLT_ENTRY_SIZE (htab);
9865 s = htab->elf.irelplt;
9866 }
9867 else
9868 {
9869 /* If this is the first .plt entry, make room for the special
9870 first entry. */
9871 s = htab->elf.splt;
9872 if (s->size == 0)
9873 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9874
9875 pent->plt.offset = s->size;
9876
9877 /* Make room for this entry. */
9878 s->size += PLT_ENTRY_SIZE (htab);
9879
9880 /* Make room for the .glink code. */
9881 s = htab->glink;
9882 if (s->size == 0)
9883 s->size += GLINK_CALL_STUB_SIZE;
9884 if (htab->opd_abi)
9885 {
9886 /* We need bigger stubs past index 32767. */
9887 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9888 s->size += 4;
9889 s->size += 2*4;
9890 }
9891 else
9892 s->size += 4;
9893
9894 /* We also need to make an entry in the .rela.plt section. */
9895 s = htab->elf.srelplt;
9896 }
9897 s->size += sizeof (Elf64_External_Rela);
9898 doneone = TRUE;
9899 }
9900 else
9901 pent->plt.offset = (bfd_vma) -1;
9902 if (!doneone)
9903 {
9904 h->plt.plist = NULL;
9905 h->needs_plt = 0;
9906 }
9907 }
9908 else
9909 {
9910 h->plt.plist = NULL;
9911 h->needs_plt = 0;
9912 }
9913
9914 return TRUE;
9915 }
9916
9917 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9918 to set up space for global entry stubs. These are put in glink,
9919 after the branch table. */
9920
9921 static bfd_boolean
9922 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9923 {
9924 struct bfd_link_info *info;
9925 struct ppc_link_hash_table *htab;
9926 struct plt_entry *pent;
9927 asection *s;
9928
9929 if (h->root.type == bfd_link_hash_indirect)
9930 return TRUE;
9931
9932 if (!h->pointer_equality_needed)
9933 return TRUE;
9934
9935 if (h->def_regular)
9936 return TRUE;
9937
9938 info = inf;
9939 htab = ppc_hash_table (info);
9940 if (htab == NULL)
9941 return FALSE;
9942
9943 s = htab->glink;
9944 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9945 if (pent->plt.offset != (bfd_vma) -1
9946 && pent->addend == 0)
9947 {
9948 /* For ELFv2, if this symbol is not defined in a regular file
9949 and we are not generating a shared library or pie, then we
9950 need to define the symbol in the executable on a call stub.
9951 This is to avoid text relocations. */
9952 s->size = (s->size + 15) & -16;
9953 h->root.type = bfd_link_hash_defined;
9954 h->root.u.def.section = s;
9955 h->root.u.def.value = s->size;
9956 s->size += 16;
9957 break;
9958 }
9959 return TRUE;
9960 }
9961
9962 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9963 read-only sections. */
9964
9965 static bfd_boolean
9966 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9967 {
9968 if (h->root.type == bfd_link_hash_indirect)
9969 return TRUE;
9970
9971 if (readonly_dynrelocs (h))
9972 {
9973 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9974
9975 /* Not an error, just cut short the traversal. */
9976 return FALSE;
9977 }
9978 return TRUE;
9979 }
9980
9981 /* Set the sizes of the dynamic sections. */
9982
9983 static bfd_boolean
9984 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9985 struct bfd_link_info *info)
9986 {
9987 struct ppc_link_hash_table *htab;
9988 bfd *dynobj;
9989 asection *s;
9990 bfd_boolean relocs;
9991 bfd *ibfd;
9992 struct got_entry *first_tlsld;
9993
9994 htab = ppc_hash_table (info);
9995 if (htab == NULL)
9996 return FALSE;
9997
9998 dynobj = htab->elf.dynobj;
9999 if (dynobj == NULL)
10000 abort ();
10001
10002 if (htab->elf.dynamic_sections_created)
10003 {
10004 /* Set the contents of the .interp section to the interpreter. */
10005 if (bfd_link_executable (info) && !info->nointerp)
10006 {
10007 s = bfd_get_linker_section (dynobj, ".interp");
10008 if (s == NULL)
10009 abort ();
10010 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10011 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10012 }
10013 }
10014
10015 /* Set up .got offsets for local syms, and space for local dynamic
10016 relocs. */
10017 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10018 {
10019 struct got_entry **lgot_ents;
10020 struct got_entry **end_lgot_ents;
10021 struct plt_entry **local_plt;
10022 struct plt_entry **end_local_plt;
10023 unsigned char *lgot_masks;
10024 bfd_size_type locsymcount;
10025 Elf_Internal_Shdr *symtab_hdr;
10026
10027 if (!is_ppc64_elf (ibfd))
10028 continue;
10029
10030 for (s = ibfd->sections; s != NULL; s = s->next)
10031 {
10032 struct ppc_dyn_relocs *p;
10033
10034 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10035 {
10036 if (!bfd_is_abs_section (p->sec)
10037 && bfd_is_abs_section (p->sec->output_section))
10038 {
10039 /* Input section has been discarded, either because
10040 it is a copy of a linkonce section or due to
10041 linker script /DISCARD/, so we'll be discarding
10042 the relocs too. */
10043 }
10044 else if (p->count != 0)
10045 {
10046 asection *srel = elf_section_data (p->sec)->sreloc;
10047 if (p->ifunc)
10048 srel = htab->elf.irelplt;
10049 srel->size += p->count * sizeof (Elf64_External_Rela);
10050 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10051 info->flags |= DF_TEXTREL;
10052 }
10053 }
10054 }
10055
10056 lgot_ents = elf_local_got_ents (ibfd);
10057 if (!lgot_ents)
10058 continue;
10059
10060 symtab_hdr = &elf_symtab_hdr (ibfd);
10061 locsymcount = symtab_hdr->sh_info;
10062 end_lgot_ents = lgot_ents + locsymcount;
10063 local_plt = (struct plt_entry **) end_lgot_ents;
10064 end_local_plt = local_plt + locsymcount;
10065 lgot_masks = (unsigned char *) end_local_plt;
10066 s = ppc64_elf_tdata (ibfd)->got;
10067 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10068 {
10069 struct got_entry **pent, *ent;
10070
10071 pent = lgot_ents;
10072 while ((ent = *pent) != NULL)
10073 if (ent->got.refcount > 0)
10074 {
10075 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10076 {
10077 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10078 *pent = ent->next;
10079 }
10080 else
10081 {
10082 unsigned int ent_size = 8;
10083 unsigned int rel_size = sizeof (Elf64_External_Rela);
10084
10085 ent->got.offset = s->size;
10086 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10087 {
10088 ent_size *= 2;
10089 rel_size *= 2;
10090 }
10091 s->size += ent_size;
10092 if ((*lgot_masks & PLT_IFUNC) != 0)
10093 {
10094 htab->elf.irelplt->size += rel_size;
10095 htab->got_reli_size += rel_size;
10096 }
10097 else if (bfd_link_pic (info))
10098 {
10099 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10100 srel->size += rel_size;
10101 }
10102 pent = &ent->next;
10103 }
10104 }
10105 else
10106 *pent = ent->next;
10107 }
10108
10109 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10110 for (; local_plt < end_local_plt; ++local_plt)
10111 {
10112 struct plt_entry *ent;
10113
10114 for (ent = *local_plt; ent != NULL; ent = ent->next)
10115 if (ent->plt.refcount > 0)
10116 {
10117 s = htab->elf.iplt;
10118 ent->plt.offset = s->size;
10119 s->size += PLT_ENTRY_SIZE (htab);
10120
10121 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10122 }
10123 else
10124 ent->plt.offset = (bfd_vma) -1;
10125 }
10126 }
10127
10128 /* Allocate global sym .plt and .got entries, and space for global
10129 sym dynamic relocs. */
10130 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10131 /* Stash the end of glink branch table. */
10132 if (htab->glink != NULL)
10133 htab->glink->rawsize = htab->glink->size;
10134
10135 if (!htab->opd_abi && !bfd_link_pic (info))
10136 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10137
10138 first_tlsld = NULL;
10139 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10140 {
10141 struct got_entry *ent;
10142
10143 if (!is_ppc64_elf (ibfd))
10144 continue;
10145
10146 ent = ppc64_tlsld_got (ibfd);
10147 if (ent->got.refcount > 0)
10148 {
10149 if (!htab->do_multi_toc && first_tlsld != NULL)
10150 {
10151 ent->is_indirect = TRUE;
10152 ent->got.ent = first_tlsld;
10153 }
10154 else
10155 {
10156 if (first_tlsld == NULL)
10157 first_tlsld = ent;
10158 s = ppc64_elf_tdata (ibfd)->got;
10159 ent->got.offset = s->size;
10160 ent->owner = ibfd;
10161 s->size += 16;
10162 if (bfd_link_pic (info))
10163 {
10164 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10165 srel->size += sizeof (Elf64_External_Rela);
10166 }
10167 }
10168 }
10169 else
10170 ent->got.offset = (bfd_vma) -1;
10171 }
10172
10173 /* We now have determined the sizes of the various dynamic sections.
10174 Allocate memory for them. */
10175 relocs = FALSE;
10176 for (s = dynobj->sections; s != NULL; s = s->next)
10177 {
10178 if ((s->flags & SEC_LINKER_CREATED) == 0)
10179 continue;
10180
10181 if (s == htab->brlt || s == htab->relbrlt)
10182 /* These haven't been allocated yet; don't strip. */
10183 continue;
10184 else if (s == htab->elf.sgot
10185 || s == htab->elf.splt
10186 || s == htab->elf.iplt
10187 || s == htab->glink
10188 || s == htab->elf.sdynbss
10189 || s == htab->elf.sdynrelro)
10190 {
10191 /* Strip this section if we don't need it; see the
10192 comment below. */
10193 }
10194 else if (s == htab->glink_eh_frame)
10195 {
10196 if (!bfd_is_abs_section (s->output_section))
10197 /* Not sized yet. */
10198 continue;
10199 }
10200 else if (CONST_STRNEQ (s->name, ".rela"))
10201 {
10202 if (s->size != 0)
10203 {
10204 if (s != htab->elf.srelplt)
10205 relocs = TRUE;
10206
10207 /* We use the reloc_count field as a counter if we need
10208 to copy relocs into the output file. */
10209 s->reloc_count = 0;
10210 }
10211 }
10212 else
10213 {
10214 /* It's not one of our sections, so don't allocate space. */
10215 continue;
10216 }
10217
10218 if (s->size == 0)
10219 {
10220 /* If we don't need this section, strip it from the
10221 output file. This is mostly to handle .rela.bss and
10222 .rela.plt. We must create both sections in
10223 create_dynamic_sections, because they must be created
10224 before the linker maps input sections to output
10225 sections. The linker does that before
10226 adjust_dynamic_symbol is called, and it is that
10227 function which decides whether anything needs to go
10228 into these sections. */
10229 s->flags |= SEC_EXCLUDE;
10230 continue;
10231 }
10232
10233 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10234 continue;
10235
10236 /* Allocate memory for the section contents. We use bfd_zalloc
10237 here in case unused entries are not reclaimed before the
10238 section's contents are written out. This should not happen,
10239 but this way if it does we get a R_PPC64_NONE reloc in .rela
10240 sections instead of garbage.
10241 We also rely on the section contents being zero when writing
10242 the GOT and .dynrelro. */
10243 s->contents = bfd_zalloc (dynobj, s->size);
10244 if (s->contents == NULL)
10245 return FALSE;
10246 }
10247
10248 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10249 {
10250 if (!is_ppc64_elf (ibfd))
10251 continue;
10252
10253 s = ppc64_elf_tdata (ibfd)->got;
10254 if (s != NULL && s != htab->elf.sgot)
10255 {
10256 if (s->size == 0)
10257 s->flags |= SEC_EXCLUDE;
10258 else
10259 {
10260 s->contents = bfd_zalloc (ibfd, s->size);
10261 if (s->contents == NULL)
10262 return FALSE;
10263 }
10264 }
10265 s = ppc64_elf_tdata (ibfd)->relgot;
10266 if (s != NULL)
10267 {
10268 if (s->size == 0)
10269 s->flags |= SEC_EXCLUDE;
10270 else
10271 {
10272 s->contents = bfd_zalloc (ibfd, s->size);
10273 if (s->contents == NULL)
10274 return FALSE;
10275 relocs = TRUE;
10276 s->reloc_count = 0;
10277 }
10278 }
10279 }
10280
10281 if (htab->elf.dynamic_sections_created)
10282 {
10283 bfd_boolean tls_opt;
10284
10285 /* Add some entries to the .dynamic section. We fill in the
10286 values later, in ppc64_elf_finish_dynamic_sections, but we
10287 must add the entries now so that we get the correct size for
10288 the .dynamic section. The DT_DEBUG entry is filled in by the
10289 dynamic linker and used by the debugger. */
10290 #define add_dynamic_entry(TAG, VAL) \
10291 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10292
10293 if (bfd_link_executable (info))
10294 {
10295 if (!add_dynamic_entry (DT_DEBUG, 0))
10296 return FALSE;
10297 }
10298
10299 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10300 {
10301 if (!add_dynamic_entry (DT_PLTGOT, 0)
10302 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10303 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10304 || !add_dynamic_entry (DT_JMPREL, 0)
10305 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10306 return FALSE;
10307 }
10308
10309 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10310 {
10311 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10312 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10313 return FALSE;
10314 }
10315
10316 tls_opt = (htab->params->tls_get_addr_opt
10317 && htab->tls_get_addr_fd != NULL
10318 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10319 if (tls_opt || !htab->opd_abi)
10320 {
10321 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10322 return FALSE;
10323 }
10324
10325 if (relocs)
10326 {
10327 if (!add_dynamic_entry (DT_RELA, 0)
10328 || !add_dynamic_entry (DT_RELASZ, 0)
10329 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10330 return FALSE;
10331
10332 /* If any dynamic relocs apply to a read-only section,
10333 then we need a DT_TEXTREL entry. */
10334 if ((info->flags & DF_TEXTREL) == 0)
10335 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10336
10337 if ((info->flags & DF_TEXTREL) != 0)
10338 {
10339 if (!add_dynamic_entry (DT_TEXTREL, 0))
10340 return FALSE;
10341 }
10342 }
10343 }
10344 #undef add_dynamic_entry
10345
10346 return TRUE;
10347 }
10348
10349 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10350
10351 static bfd_boolean
10352 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10353 {
10354 if (h->plt.plist != NULL
10355 && !h->def_regular
10356 && !h->pointer_equality_needed)
10357 return FALSE;
10358
10359 return _bfd_elf_hash_symbol (h);
10360 }
10361
10362 /* Determine the type of stub needed, if any, for a call. */
10363
10364 static inline enum ppc_stub_type
10365 ppc_type_of_stub (asection *input_sec,
10366 const Elf_Internal_Rela *rel,
10367 struct ppc_link_hash_entry **hash,
10368 struct plt_entry **plt_ent,
10369 bfd_vma destination,
10370 unsigned long local_off)
10371 {
10372 struct ppc_link_hash_entry *h = *hash;
10373 bfd_vma location;
10374 bfd_vma branch_offset;
10375 bfd_vma max_branch_offset;
10376 enum elf_ppc64_reloc_type r_type;
10377
10378 if (h != NULL)
10379 {
10380 struct plt_entry *ent;
10381 struct ppc_link_hash_entry *fdh = h;
10382 if (h->oh != NULL
10383 && h->oh->is_func_descriptor)
10384 {
10385 fdh = ppc_follow_link (h->oh);
10386 *hash = fdh;
10387 }
10388
10389 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10390 if (ent->addend == rel->r_addend
10391 && ent->plt.offset != (bfd_vma) -1)
10392 {
10393 *plt_ent = ent;
10394 return ppc_stub_plt_call;
10395 }
10396
10397 /* Here, we know we don't have a plt entry. If we don't have a
10398 either a defined function descriptor or a defined entry symbol
10399 in a regular object file, then it is pointless trying to make
10400 any other type of stub. */
10401 if (!is_static_defined (&fdh->elf)
10402 && !is_static_defined (&h->elf))
10403 return ppc_stub_none;
10404 }
10405 else if (elf_local_got_ents (input_sec->owner) != NULL)
10406 {
10407 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10408 struct plt_entry **local_plt = (struct plt_entry **)
10409 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10410 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10411
10412 if (local_plt[r_symndx] != NULL)
10413 {
10414 struct plt_entry *ent;
10415
10416 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10417 if (ent->addend == rel->r_addend
10418 && ent->plt.offset != (bfd_vma) -1)
10419 {
10420 *plt_ent = ent;
10421 return ppc_stub_plt_call;
10422 }
10423 }
10424 }
10425
10426 /* Determine where the call point is. */
10427 location = (input_sec->output_offset
10428 + input_sec->output_section->vma
10429 + rel->r_offset);
10430
10431 branch_offset = destination - location;
10432 r_type = ELF64_R_TYPE (rel->r_info);
10433
10434 /* Determine if a long branch stub is needed. */
10435 max_branch_offset = 1 << 25;
10436 if (r_type != R_PPC64_REL24)
10437 max_branch_offset = 1 << 15;
10438
10439 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10440 /* We need a stub. Figure out whether a long_branch or plt_branch
10441 is needed later. */
10442 return ppc_stub_long_branch;
10443
10444 return ppc_stub_none;
10445 }
10446
10447 /* With power7 weakly ordered memory model, it is possible for ld.so
10448 to update a plt entry in one thread and have another thread see a
10449 stale zero toc entry. To avoid this we need some sort of acquire
10450 barrier in the call stub. One solution is to make the load of the
10451 toc word seem to appear to depend on the load of the function entry
10452 word. Another solution is to test for r2 being zero, and branch to
10453 the appropriate glink entry if so.
10454
10455 . fake dep barrier compare
10456 . ld 12,xxx(2) ld 12,xxx(2)
10457 . mtctr 12 mtctr 12
10458 . xor 11,12,12 ld 2,xxx+8(2)
10459 . add 2,2,11 cmpldi 2,0
10460 . ld 2,xxx+8(2) bnectr+
10461 . bctr b <glink_entry>
10462
10463 The solution involving the compare turns out to be faster, so
10464 that's what we use unless the branch won't reach. */
10465
10466 #define ALWAYS_USE_FAKE_DEP 0
10467 #define ALWAYS_EMIT_R2SAVE 0
10468
10469 #define PPC_LO(v) ((v) & 0xffff)
10470 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10471 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10472
10473 static inline unsigned int
10474 plt_stub_size (struct ppc_link_hash_table *htab,
10475 struct ppc_stub_hash_entry *stub_entry,
10476 bfd_vma off)
10477 {
10478 unsigned size = 12;
10479
10480 if (ALWAYS_EMIT_R2SAVE
10481 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10482 size += 4;
10483 if (PPC_HA (off) != 0)
10484 size += 4;
10485 if (htab->opd_abi)
10486 {
10487 size += 4;
10488 if (htab->params->plt_static_chain)
10489 size += 4;
10490 if (htab->params->plt_thread_safe
10491 && htab->elf.dynamic_sections_created
10492 && stub_entry->h != NULL
10493 && stub_entry->h->elf.dynindx != -1)
10494 size += 8;
10495 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10496 size += 4;
10497 }
10498 if (stub_entry->h != NULL
10499 && (stub_entry->h == htab->tls_get_addr_fd
10500 || stub_entry->h == htab->tls_get_addr)
10501 && htab->params->tls_get_addr_opt)
10502 size += 13 * 4;
10503 return size;
10504 }
10505
10506 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10507 then return the padding needed to do so. */
10508 static inline unsigned int
10509 plt_stub_pad (struct ppc_link_hash_table *htab,
10510 struct ppc_stub_hash_entry *stub_entry,
10511 bfd_vma plt_off)
10512 {
10513 int stub_align = 1 << htab->params->plt_stub_align;
10514 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10515 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10516
10517 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10518 > ((stub_size - 1) & -stub_align))
10519 return stub_align - (stub_off & (stub_align - 1));
10520 return 0;
10521 }
10522
10523 /* Build a .plt call stub. */
10524
10525 static inline bfd_byte *
10526 build_plt_stub (struct ppc_link_hash_table *htab,
10527 struct ppc_stub_hash_entry *stub_entry,
10528 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10529 {
10530 bfd *obfd = htab->params->stub_bfd;
10531 bfd_boolean plt_load_toc = htab->opd_abi;
10532 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10533 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10534 && htab->elf.dynamic_sections_created
10535 && stub_entry->h != NULL
10536 && stub_entry->h->elf.dynindx != -1);
10537 bfd_boolean use_fake_dep = plt_thread_safe;
10538 bfd_vma cmp_branch_off = 0;
10539
10540 if (!ALWAYS_USE_FAKE_DEP
10541 && plt_load_toc
10542 && plt_thread_safe
10543 && !((stub_entry->h == htab->tls_get_addr_fd
10544 || stub_entry->h == htab->tls_get_addr)
10545 && htab->params->tls_get_addr_opt))
10546 {
10547 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10548 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10549 / PLT_ENTRY_SIZE (htab));
10550 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10551 bfd_vma to, from;
10552
10553 if (pltindex > 32768)
10554 glinkoff += (pltindex - 32768) * 4;
10555 to = (glinkoff
10556 + htab->glink->output_offset
10557 + htab->glink->output_section->vma);
10558 from = (p - stub_entry->group->stub_sec->contents
10559 + 4 * (ALWAYS_EMIT_R2SAVE
10560 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10561 + 4 * (PPC_HA (offset) != 0)
10562 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10563 != PPC_HA (offset))
10564 + 4 * (plt_static_chain != 0)
10565 + 20
10566 + stub_entry->group->stub_sec->output_offset
10567 + stub_entry->group->stub_sec->output_section->vma);
10568 cmp_branch_off = to - from;
10569 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10570 }
10571
10572 if (PPC_HA (offset) != 0)
10573 {
10574 if (r != NULL)
10575 {
10576 if (ALWAYS_EMIT_R2SAVE
10577 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10578 r[0].r_offset += 4;
10579 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10580 r[1].r_offset = r[0].r_offset + 4;
10581 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10582 r[1].r_addend = r[0].r_addend;
10583 if (plt_load_toc)
10584 {
10585 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10586 {
10587 r[2].r_offset = r[1].r_offset + 4;
10588 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10589 r[2].r_addend = r[0].r_addend;
10590 }
10591 else
10592 {
10593 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10594 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10595 r[2].r_addend = r[0].r_addend + 8;
10596 if (plt_static_chain)
10597 {
10598 r[3].r_offset = r[2].r_offset + 4;
10599 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10600 r[3].r_addend = r[0].r_addend + 16;
10601 }
10602 }
10603 }
10604 }
10605 if (ALWAYS_EMIT_R2SAVE
10606 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10607 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10608 if (plt_load_toc)
10609 {
10610 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10611 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10612 }
10613 else
10614 {
10615 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10616 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10617 }
10618 if (plt_load_toc
10619 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10620 {
10621 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10622 offset = 0;
10623 }
10624 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10625 if (plt_load_toc)
10626 {
10627 if (use_fake_dep)
10628 {
10629 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10630 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10631 }
10632 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10633 if (plt_static_chain)
10634 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10635 }
10636 }
10637 else
10638 {
10639 if (r != NULL)
10640 {
10641 if (ALWAYS_EMIT_R2SAVE
10642 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10643 r[0].r_offset += 4;
10644 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10645 if (plt_load_toc)
10646 {
10647 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10648 {
10649 r[1].r_offset = r[0].r_offset + 4;
10650 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10651 r[1].r_addend = r[0].r_addend;
10652 }
10653 else
10654 {
10655 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10656 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10657 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10658 if (plt_static_chain)
10659 {
10660 r[2].r_offset = r[1].r_offset + 4;
10661 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10662 r[2].r_addend = r[0].r_addend + 8;
10663 }
10664 }
10665 }
10666 }
10667 if (ALWAYS_EMIT_R2SAVE
10668 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10669 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10670 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10671 if (plt_load_toc
10672 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10673 {
10674 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10675 offset = 0;
10676 }
10677 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10678 if (plt_load_toc)
10679 {
10680 if (use_fake_dep)
10681 {
10682 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10683 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10684 }
10685 if (plt_static_chain)
10686 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10687 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10688 }
10689 }
10690 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10691 {
10692 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10693 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10694 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10695 }
10696 else
10697 bfd_put_32 (obfd, BCTR, p), p += 4;
10698 return p;
10699 }
10700
10701 /* Build a special .plt call stub for __tls_get_addr. */
10702
10703 #define LD_R11_0R3 0xe9630000
10704 #define LD_R12_0R3 0xe9830000
10705 #define MR_R0_R3 0x7c601b78
10706 #define CMPDI_R11_0 0x2c2b0000
10707 #define ADD_R3_R12_R13 0x7c6c6a14
10708 #define BEQLR 0x4d820020
10709 #define MR_R3_R0 0x7c030378
10710 #define STD_R11_0R1 0xf9610000
10711 #define BCTRL 0x4e800421
10712 #define LD_R11_0R1 0xe9610000
10713 #define MTLR_R11 0x7d6803a6
10714
10715 static inline bfd_byte *
10716 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10717 struct ppc_stub_hash_entry *stub_entry,
10718 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10719 {
10720 bfd *obfd = htab->params->stub_bfd;
10721
10722 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10723 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10724 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10725 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10726 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10727 bfd_put_32 (obfd, BEQLR, p), p += 4;
10728 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10729 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10730 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10731
10732 if (r != NULL)
10733 r[0].r_offset += 9 * 4;
10734 p = build_plt_stub (htab, stub_entry, p, offset, r);
10735 bfd_put_32 (obfd, BCTRL, p - 4);
10736
10737 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10738 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10739 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10740 bfd_put_32 (obfd, BLR, p), p += 4;
10741
10742 return p;
10743 }
10744
10745 static Elf_Internal_Rela *
10746 get_relocs (asection *sec, int count)
10747 {
10748 Elf_Internal_Rela *relocs;
10749 struct bfd_elf_section_data *elfsec_data;
10750
10751 elfsec_data = elf_section_data (sec);
10752 relocs = elfsec_data->relocs;
10753 if (relocs == NULL)
10754 {
10755 bfd_size_type relsize;
10756 relsize = sec->reloc_count * sizeof (*relocs);
10757 relocs = bfd_alloc (sec->owner, relsize);
10758 if (relocs == NULL)
10759 return NULL;
10760 elfsec_data->relocs = relocs;
10761 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10762 sizeof (Elf_Internal_Shdr));
10763 if (elfsec_data->rela.hdr == NULL)
10764 return NULL;
10765 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10766 * sizeof (Elf64_External_Rela));
10767 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10768 sec->reloc_count = 0;
10769 }
10770 relocs += sec->reloc_count;
10771 sec->reloc_count += count;
10772 return relocs;
10773 }
10774
10775 static bfd_vma
10776 get_r2off (struct bfd_link_info *info,
10777 struct ppc_stub_hash_entry *stub_entry)
10778 {
10779 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10780 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10781
10782 if (r2off == 0)
10783 {
10784 /* Support linking -R objects. Get the toc pointer from the
10785 opd entry. */
10786 char buf[8];
10787 if (!htab->opd_abi)
10788 return r2off;
10789 asection *opd = stub_entry->h->elf.root.u.def.section;
10790 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10791
10792 if (strcmp (opd->name, ".opd") != 0
10793 || opd->reloc_count != 0)
10794 {
10795 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10796 stub_entry->h->elf.root.root.string);
10797 bfd_set_error (bfd_error_bad_value);
10798 return (bfd_vma) -1;
10799 }
10800 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10801 return (bfd_vma) -1;
10802 r2off = bfd_get_64 (opd->owner, buf);
10803 r2off -= elf_gp (info->output_bfd);
10804 }
10805 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10806 return r2off;
10807 }
10808
10809 static bfd_boolean
10810 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10811 {
10812 struct ppc_stub_hash_entry *stub_entry;
10813 struct ppc_branch_hash_entry *br_entry;
10814 struct bfd_link_info *info;
10815 struct ppc_link_hash_table *htab;
10816 bfd_byte *loc;
10817 bfd_byte *p;
10818 bfd_vma dest, off;
10819 int size;
10820 Elf_Internal_Rela *r;
10821 asection *plt;
10822
10823 /* Massage our args to the form they really have. */
10824 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10825 info = in_arg;
10826
10827 htab = ppc_hash_table (info);
10828 if (htab == NULL)
10829 return FALSE;
10830
10831 /* Make a note of the offset within the stubs for this entry. */
10832 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10833 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10834
10835 htab->stub_count[stub_entry->stub_type - 1] += 1;
10836 switch (stub_entry->stub_type)
10837 {
10838 case ppc_stub_long_branch:
10839 case ppc_stub_long_branch_r2off:
10840 /* Branches are relative. This is where we are going to. */
10841 dest = (stub_entry->target_value
10842 + stub_entry->target_section->output_offset
10843 + stub_entry->target_section->output_section->vma);
10844 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10845 off = dest;
10846
10847 /* And this is where we are coming from. */
10848 off -= (stub_entry->stub_offset
10849 + stub_entry->group->stub_sec->output_offset
10850 + stub_entry->group->stub_sec->output_section->vma);
10851
10852 size = 4;
10853 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10854 {
10855 bfd_vma r2off = get_r2off (info, stub_entry);
10856
10857 if (r2off == (bfd_vma) -1)
10858 {
10859 htab->stub_error = TRUE;
10860 return FALSE;
10861 }
10862 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10863 loc += 4;
10864 size = 8;
10865 if (PPC_HA (r2off) != 0)
10866 {
10867 bfd_put_32 (htab->params->stub_bfd,
10868 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10869 loc += 4;
10870 size += 4;
10871 }
10872 if (PPC_LO (r2off) != 0)
10873 {
10874 bfd_put_32 (htab->params->stub_bfd,
10875 ADDI_R2_R2 | PPC_LO (r2off), loc);
10876 loc += 4;
10877 size += 4;
10878 }
10879 off -= size - 4;
10880 }
10881 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10882
10883 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10884 {
10885 info->callbacks->einfo
10886 (_("%P: long branch stub `%s' offset overflow\n"),
10887 stub_entry->root.string);
10888 htab->stub_error = TRUE;
10889 return FALSE;
10890 }
10891
10892 if (info->emitrelocations)
10893 {
10894 r = get_relocs (stub_entry->group->stub_sec, 1);
10895 if (r == NULL)
10896 return FALSE;
10897 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10898 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10899 r->r_addend = dest;
10900 if (stub_entry->h != NULL)
10901 {
10902 struct elf_link_hash_entry **hashes;
10903 unsigned long symndx;
10904 struct ppc_link_hash_entry *h;
10905
10906 hashes = elf_sym_hashes (htab->params->stub_bfd);
10907 if (hashes == NULL)
10908 {
10909 bfd_size_type hsize;
10910
10911 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10912 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10913 if (hashes == NULL)
10914 return FALSE;
10915 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10916 htab->stub_globals = 1;
10917 }
10918 symndx = htab->stub_globals++;
10919 h = stub_entry->h;
10920 hashes[symndx] = &h->elf;
10921 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10922 if (h->oh != NULL && h->oh->is_func)
10923 h = ppc_follow_link (h->oh);
10924 if (h->elf.root.u.def.section != stub_entry->target_section)
10925 /* H is an opd symbol. The addend must be zero. */
10926 r->r_addend = 0;
10927 else
10928 {
10929 off = (h->elf.root.u.def.value
10930 + h->elf.root.u.def.section->output_offset
10931 + h->elf.root.u.def.section->output_section->vma);
10932 r->r_addend -= off;
10933 }
10934 }
10935 }
10936 break;
10937
10938 case ppc_stub_plt_branch:
10939 case ppc_stub_plt_branch_r2off:
10940 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10941 stub_entry->root.string + 9,
10942 FALSE, FALSE);
10943 if (br_entry == NULL)
10944 {
10945 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10946 stub_entry->root.string);
10947 htab->stub_error = TRUE;
10948 return FALSE;
10949 }
10950
10951 dest = (stub_entry->target_value
10952 + stub_entry->target_section->output_offset
10953 + stub_entry->target_section->output_section->vma);
10954 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10955 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10956
10957 bfd_put_64 (htab->brlt->owner, dest,
10958 htab->brlt->contents + br_entry->offset);
10959
10960 if (br_entry->iter == htab->stub_iteration)
10961 {
10962 br_entry->iter = 0;
10963
10964 if (htab->relbrlt != NULL)
10965 {
10966 /* Create a reloc for the branch lookup table entry. */
10967 Elf_Internal_Rela rela;
10968 bfd_byte *rl;
10969
10970 rela.r_offset = (br_entry->offset
10971 + htab->brlt->output_offset
10972 + htab->brlt->output_section->vma);
10973 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10974 rela.r_addend = dest;
10975
10976 rl = htab->relbrlt->contents;
10977 rl += (htab->relbrlt->reloc_count++
10978 * sizeof (Elf64_External_Rela));
10979 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10980 }
10981 else if (info->emitrelocations)
10982 {
10983 r = get_relocs (htab->brlt, 1);
10984 if (r == NULL)
10985 return FALSE;
10986 /* brlt, being SEC_LINKER_CREATED does not go through the
10987 normal reloc processing. Symbols and offsets are not
10988 translated from input file to output file form, so
10989 set up the offset per the output file. */
10990 r->r_offset = (br_entry->offset
10991 + htab->brlt->output_offset
10992 + htab->brlt->output_section->vma);
10993 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10994 r->r_addend = dest;
10995 }
10996 }
10997
10998 dest = (br_entry->offset
10999 + htab->brlt->output_offset
11000 + htab->brlt->output_section->vma);
11001
11002 off = (dest
11003 - elf_gp (htab->brlt->output_section->owner)
11004 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11005
11006 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11007 {
11008 info->callbacks->einfo
11009 (_("%P: linkage table error against `%T'\n"),
11010 stub_entry->root.string);
11011 bfd_set_error (bfd_error_bad_value);
11012 htab->stub_error = TRUE;
11013 return FALSE;
11014 }
11015
11016 if (info->emitrelocations)
11017 {
11018 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11019 if (r == NULL)
11020 return FALSE;
11021 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11022 if (bfd_big_endian (info->output_bfd))
11023 r[0].r_offset += 2;
11024 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11025 r[0].r_offset += 4;
11026 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11027 r[0].r_addend = dest;
11028 if (PPC_HA (off) != 0)
11029 {
11030 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11031 r[1].r_offset = r[0].r_offset + 4;
11032 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11033 r[1].r_addend = r[0].r_addend;
11034 }
11035 }
11036
11037 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11038 {
11039 if (PPC_HA (off) != 0)
11040 {
11041 size = 16;
11042 bfd_put_32 (htab->params->stub_bfd,
11043 ADDIS_R12_R2 | PPC_HA (off), loc);
11044 loc += 4;
11045 bfd_put_32 (htab->params->stub_bfd,
11046 LD_R12_0R12 | PPC_LO (off), loc);
11047 }
11048 else
11049 {
11050 size = 12;
11051 bfd_put_32 (htab->params->stub_bfd,
11052 LD_R12_0R2 | PPC_LO (off), loc);
11053 }
11054 }
11055 else
11056 {
11057 bfd_vma r2off = get_r2off (info, stub_entry);
11058
11059 if (r2off == (bfd_vma) -1)
11060 {
11061 htab->stub_error = TRUE;
11062 return FALSE;
11063 }
11064
11065 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11066 loc += 4;
11067 size = 16;
11068 if (PPC_HA (off) != 0)
11069 {
11070 size += 4;
11071 bfd_put_32 (htab->params->stub_bfd,
11072 ADDIS_R12_R2 | PPC_HA (off), loc);
11073 loc += 4;
11074 bfd_put_32 (htab->params->stub_bfd,
11075 LD_R12_0R12 | PPC_LO (off), loc);
11076 }
11077 else
11078 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11079
11080 if (PPC_HA (r2off) != 0)
11081 {
11082 size += 4;
11083 loc += 4;
11084 bfd_put_32 (htab->params->stub_bfd,
11085 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11086 }
11087 if (PPC_LO (r2off) != 0)
11088 {
11089 size += 4;
11090 loc += 4;
11091 bfd_put_32 (htab->params->stub_bfd,
11092 ADDI_R2_R2 | PPC_LO (r2off), loc);
11093 }
11094 }
11095 loc += 4;
11096 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11097 loc += 4;
11098 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11099 break;
11100
11101 case ppc_stub_plt_call:
11102 case ppc_stub_plt_call_r2save:
11103 if (stub_entry->h != NULL
11104 && stub_entry->h->is_func_descriptor
11105 && stub_entry->h->oh != NULL)
11106 {
11107 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11108
11109 /* If the old-ABI "dot-symbol" is undefined make it weak so
11110 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11111 if (fh->elf.root.type == bfd_link_hash_undefined
11112 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11113 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11114 fh->elf.root.type = bfd_link_hash_undefweak;
11115 }
11116
11117 /* Now build the stub. */
11118 dest = stub_entry->plt_ent->plt.offset & ~1;
11119 if (dest >= (bfd_vma) -2)
11120 abort ();
11121
11122 plt = htab->elf.splt;
11123 if (!htab->elf.dynamic_sections_created
11124 || stub_entry->h == NULL
11125 || stub_entry->h->elf.dynindx == -1)
11126 plt = htab->elf.iplt;
11127
11128 dest += plt->output_offset + plt->output_section->vma;
11129
11130 if (stub_entry->h == NULL
11131 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11132 {
11133 Elf_Internal_Rela rela;
11134 bfd_byte *rl;
11135
11136 rela.r_offset = dest;
11137 if (htab->opd_abi)
11138 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11139 else
11140 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11141 rela.r_addend = (stub_entry->target_value
11142 + stub_entry->target_section->output_offset
11143 + stub_entry->target_section->output_section->vma);
11144
11145 rl = (htab->elf.irelplt->contents
11146 + (htab->elf.irelplt->reloc_count++
11147 * sizeof (Elf64_External_Rela)));
11148 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11149 stub_entry->plt_ent->plt.offset |= 1;
11150 }
11151
11152 off = (dest
11153 - elf_gp (plt->output_section->owner)
11154 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11155
11156 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11157 {
11158 info->callbacks->einfo
11159 /* xgettext:c-format */
11160 (_("%P: linkage table error against `%T'\n"),
11161 stub_entry->h != NULL
11162 ? stub_entry->h->elf.root.root.string
11163 : "<local sym>");
11164 bfd_set_error (bfd_error_bad_value);
11165 htab->stub_error = TRUE;
11166 return FALSE;
11167 }
11168
11169 if (htab->params->plt_stub_align != 0)
11170 {
11171 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11172
11173 stub_entry->group->stub_sec->size += pad;
11174 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11175 loc += pad;
11176 }
11177
11178 r = NULL;
11179 if (info->emitrelocations)
11180 {
11181 r = get_relocs (stub_entry->group->stub_sec,
11182 ((PPC_HA (off) != 0)
11183 + (htab->opd_abi
11184 ? 2 + (htab->params->plt_static_chain
11185 && PPC_HA (off + 16) == PPC_HA (off))
11186 : 1)));
11187 if (r == NULL)
11188 return FALSE;
11189 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11190 if (bfd_big_endian (info->output_bfd))
11191 r[0].r_offset += 2;
11192 r[0].r_addend = dest;
11193 }
11194 if (stub_entry->h != NULL
11195 && (stub_entry->h == htab->tls_get_addr_fd
11196 || stub_entry->h == htab->tls_get_addr)
11197 && htab->params->tls_get_addr_opt)
11198 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11199 else
11200 p = build_plt_stub (htab, stub_entry, loc, off, r);
11201 size = p - loc;
11202 break;
11203
11204 case ppc_stub_save_res:
11205 return TRUE;
11206
11207 default:
11208 BFD_FAIL ();
11209 return FALSE;
11210 }
11211
11212 stub_entry->group->stub_sec->size += size;
11213
11214 if (htab->params->emit_stub_syms)
11215 {
11216 struct elf_link_hash_entry *h;
11217 size_t len1, len2;
11218 char *name;
11219 const char *const stub_str[] = { "long_branch",
11220 "long_branch_r2off",
11221 "plt_branch",
11222 "plt_branch_r2off",
11223 "plt_call",
11224 "plt_call" };
11225
11226 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11227 len2 = strlen (stub_entry->root.string);
11228 name = bfd_malloc (len1 + len2 + 2);
11229 if (name == NULL)
11230 return FALSE;
11231 memcpy (name, stub_entry->root.string, 9);
11232 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11233 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11234 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11235 if (h == NULL)
11236 return FALSE;
11237 if (h->root.type == bfd_link_hash_new)
11238 {
11239 h->root.type = bfd_link_hash_defined;
11240 h->root.u.def.section = stub_entry->group->stub_sec;
11241 h->root.u.def.value = stub_entry->stub_offset;
11242 h->ref_regular = 1;
11243 h->def_regular = 1;
11244 h->ref_regular_nonweak = 1;
11245 h->forced_local = 1;
11246 h->non_elf = 0;
11247 h->root.linker_def = 1;
11248 }
11249 }
11250
11251 return TRUE;
11252 }
11253
11254 /* As above, but don't actually build the stub. Just bump offset so
11255 we know stub section sizes, and select plt_branch stubs where
11256 long_branch stubs won't do. */
11257
11258 static bfd_boolean
11259 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11260 {
11261 struct ppc_stub_hash_entry *stub_entry;
11262 struct bfd_link_info *info;
11263 struct ppc_link_hash_table *htab;
11264 bfd_vma off;
11265 int size;
11266
11267 /* Massage our args to the form they really have. */
11268 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11269 info = in_arg;
11270
11271 htab = ppc_hash_table (info);
11272 if (htab == NULL)
11273 return FALSE;
11274
11275 if (stub_entry->h != NULL
11276 && stub_entry->h->save_res
11277 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11278 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11279 {
11280 /* Don't make stubs to out-of-line register save/restore
11281 functions. Instead, emit copies of the functions. */
11282 stub_entry->group->needs_save_res = 1;
11283 stub_entry->stub_type = ppc_stub_save_res;
11284 return TRUE;
11285 }
11286
11287 if (stub_entry->stub_type == ppc_stub_plt_call
11288 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11289 {
11290 asection *plt;
11291 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11292 if (off >= (bfd_vma) -2)
11293 abort ();
11294 plt = htab->elf.splt;
11295 if (!htab->elf.dynamic_sections_created
11296 || stub_entry->h == NULL
11297 || stub_entry->h->elf.dynindx == -1)
11298 plt = htab->elf.iplt;
11299 off += (plt->output_offset
11300 + plt->output_section->vma
11301 - elf_gp (plt->output_section->owner)
11302 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11303
11304 size = plt_stub_size (htab, stub_entry, off);
11305 if (htab->params->plt_stub_align)
11306 size += plt_stub_pad (htab, stub_entry, off);
11307 if (info->emitrelocations)
11308 {
11309 stub_entry->group->stub_sec->reloc_count
11310 += ((PPC_HA (off) != 0)
11311 + (htab->opd_abi
11312 ? 2 + (htab->params->plt_static_chain
11313 && PPC_HA (off + 16) == PPC_HA (off))
11314 : 1));
11315 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11316 }
11317 }
11318 else
11319 {
11320 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11321 variants. */
11322 bfd_vma r2off = 0;
11323 bfd_vma local_off = 0;
11324
11325 off = (stub_entry->target_value
11326 + stub_entry->target_section->output_offset
11327 + stub_entry->target_section->output_section->vma);
11328 off -= (stub_entry->group->stub_sec->size
11329 + stub_entry->group->stub_sec->output_offset
11330 + stub_entry->group->stub_sec->output_section->vma);
11331
11332 /* Reset the stub type from the plt variant in case we now
11333 can reach with a shorter stub. */
11334 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11335 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11336
11337 size = 4;
11338 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11339 {
11340 r2off = get_r2off (info, stub_entry);
11341 if (r2off == (bfd_vma) -1)
11342 {
11343 htab->stub_error = TRUE;
11344 return FALSE;
11345 }
11346 size = 8;
11347 if (PPC_HA (r2off) != 0)
11348 size += 4;
11349 if (PPC_LO (r2off) != 0)
11350 size += 4;
11351 off -= size - 4;
11352 }
11353
11354 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11355
11356 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11357 Do the same for -R objects without function descriptors. */
11358 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11359 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11360 && r2off == 0
11361 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11362 {
11363 struct ppc_branch_hash_entry *br_entry;
11364
11365 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11366 stub_entry->root.string + 9,
11367 TRUE, FALSE);
11368 if (br_entry == NULL)
11369 {
11370 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11371 stub_entry->root.string);
11372 htab->stub_error = TRUE;
11373 return FALSE;
11374 }
11375
11376 if (br_entry->iter != htab->stub_iteration)
11377 {
11378 br_entry->iter = htab->stub_iteration;
11379 br_entry->offset = htab->brlt->size;
11380 htab->brlt->size += 8;
11381
11382 if (htab->relbrlt != NULL)
11383 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11384 else if (info->emitrelocations)
11385 {
11386 htab->brlt->reloc_count += 1;
11387 htab->brlt->flags |= SEC_RELOC;
11388 }
11389 }
11390
11391 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11392 off = (br_entry->offset
11393 + htab->brlt->output_offset
11394 + htab->brlt->output_section->vma
11395 - elf_gp (htab->brlt->output_section->owner)
11396 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11397
11398 if (info->emitrelocations)
11399 {
11400 stub_entry->group->stub_sec->reloc_count
11401 += 1 + (PPC_HA (off) != 0);
11402 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11403 }
11404
11405 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11406 {
11407 size = 12;
11408 if (PPC_HA (off) != 0)
11409 size = 16;
11410 }
11411 else
11412 {
11413 size = 16;
11414 if (PPC_HA (off) != 0)
11415 size += 4;
11416
11417 if (PPC_HA (r2off) != 0)
11418 size += 4;
11419 if (PPC_LO (r2off) != 0)
11420 size += 4;
11421 }
11422 }
11423 else if (info->emitrelocations)
11424 {
11425 stub_entry->group->stub_sec->reloc_count += 1;
11426 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11427 }
11428 }
11429
11430 stub_entry->group->stub_sec->size += size;
11431 return TRUE;
11432 }
11433
11434 /* Set up various things so that we can make a list of input sections
11435 for each output section included in the link. Returns -1 on error,
11436 0 when no stubs will be needed, and 1 on success. */
11437
11438 int
11439 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11440 {
11441 unsigned int id;
11442 bfd_size_type amt;
11443 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11444
11445 if (htab == NULL)
11446 return -1;
11447
11448 htab->sec_info_arr_size = bfd_get_next_section_id ();
11449 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11450 htab->sec_info = bfd_zmalloc (amt);
11451 if (htab->sec_info == NULL)
11452 return -1;
11453
11454 /* Set toc_off for com, und, abs and ind sections. */
11455 for (id = 0; id < 3; id++)
11456 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11457
11458 return 1;
11459 }
11460
11461 /* Set up for first pass at multitoc partitioning. */
11462
11463 void
11464 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11465 {
11466 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11467
11468 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11469 htab->toc_bfd = NULL;
11470 htab->toc_first_sec = NULL;
11471 }
11472
11473 /* The linker repeatedly calls this function for each TOC input section
11474 and linker generated GOT section. Group input bfds such that the toc
11475 within a group is less than 64k in size. */
11476
11477 bfd_boolean
11478 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11479 {
11480 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11481 bfd_vma addr, off, limit;
11482
11483 if (htab == NULL)
11484 return FALSE;
11485
11486 if (!htab->second_toc_pass)
11487 {
11488 /* Keep track of the first .toc or .got section for this input bfd. */
11489 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11490
11491 if (new_bfd)
11492 {
11493 htab->toc_bfd = isec->owner;
11494 htab->toc_first_sec = isec;
11495 }
11496
11497 addr = isec->output_offset + isec->output_section->vma;
11498 off = addr - htab->toc_curr;
11499 limit = 0x80008000;
11500 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11501 limit = 0x10000;
11502 if (off + isec->size > limit)
11503 {
11504 addr = (htab->toc_first_sec->output_offset
11505 + htab->toc_first_sec->output_section->vma);
11506 htab->toc_curr = addr;
11507 htab->toc_curr &= -TOC_BASE_ALIGN;
11508 }
11509
11510 /* toc_curr is the base address of this toc group. Set elf_gp
11511 for the input section to be the offset relative to the
11512 output toc base plus 0x8000. Making the input elf_gp an
11513 offset allows us to move the toc as a whole without
11514 recalculating input elf_gp. */
11515 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11516 off += TOC_BASE_OFF;
11517
11518 /* Die if someone uses a linker script that doesn't keep input
11519 file .toc and .got together. */
11520 if (new_bfd
11521 && elf_gp (isec->owner) != 0
11522 && elf_gp (isec->owner) != off)
11523 return FALSE;
11524
11525 elf_gp (isec->owner) = off;
11526 return TRUE;
11527 }
11528
11529 /* During the second pass toc_first_sec points to the start of
11530 a toc group, and toc_curr is used to track the old elf_gp.
11531 We use toc_bfd to ensure we only look at each bfd once. */
11532 if (htab->toc_bfd == isec->owner)
11533 return TRUE;
11534 htab->toc_bfd = isec->owner;
11535
11536 if (htab->toc_first_sec == NULL
11537 || htab->toc_curr != elf_gp (isec->owner))
11538 {
11539 htab->toc_curr = elf_gp (isec->owner);
11540 htab->toc_first_sec = isec;
11541 }
11542 addr = (htab->toc_first_sec->output_offset
11543 + htab->toc_first_sec->output_section->vma);
11544 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11545 elf_gp (isec->owner) = off;
11546
11547 return TRUE;
11548 }
11549
11550 /* Called via elf_link_hash_traverse to merge GOT entries for global
11551 symbol H. */
11552
11553 static bfd_boolean
11554 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11555 {
11556 if (h->root.type == bfd_link_hash_indirect)
11557 return TRUE;
11558
11559 merge_got_entries (&h->got.glist);
11560
11561 return TRUE;
11562 }
11563
11564 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11565 symbol H. */
11566
11567 static bfd_boolean
11568 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11569 {
11570 struct got_entry *gent;
11571
11572 if (h->root.type == bfd_link_hash_indirect)
11573 return TRUE;
11574
11575 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11576 if (!gent->is_indirect)
11577 allocate_got (h, (struct bfd_link_info *) inf, gent);
11578 return TRUE;
11579 }
11580
11581 /* Called on the first multitoc pass after the last call to
11582 ppc64_elf_next_toc_section. This function removes duplicate GOT
11583 entries. */
11584
11585 bfd_boolean
11586 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11587 {
11588 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11589 struct bfd *ibfd, *ibfd2;
11590 bfd_boolean done_something;
11591
11592 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11593
11594 if (!htab->do_multi_toc)
11595 return FALSE;
11596
11597 /* Merge global sym got entries within a toc group. */
11598 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11599
11600 /* And tlsld_got. */
11601 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11602 {
11603 struct got_entry *ent, *ent2;
11604
11605 if (!is_ppc64_elf (ibfd))
11606 continue;
11607
11608 ent = ppc64_tlsld_got (ibfd);
11609 if (!ent->is_indirect
11610 && ent->got.offset != (bfd_vma) -1)
11611 {
11612 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11613 {
11614 if (!is_ppc64_elf (ibfd2))
11615 continue;
11616
11617 ent2 = ppc64_tlsld_got (ibfd2);
11618 if (!ent2->is_indirect
11619 && ent2->got.offset != (bfd_vma) -1
11620 && elf_gp (ibfd2) == elf_gp (ibfd))
11621 {
11622 ent2->is_indirect = TRUE;
11623 ent2->got.ent = ent;
11624 }
11625 }
11626 }
11627 }
11628
11629 /* Zap sizes of got sections. */
11630 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11631 htab->elf.irelplt->size -= htab->got_reli_size;
11632 htab->got_reli_size = 0;
11633
11634 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11635 {
11636 asection *got, *relgot;
11637
11638 if (!is_ppc64_elf (ibfd))
11639 continue;
11640
11641 got = ppc64_elf_tdata (ibfd)->got;
11642 if (got != NULL)
11643 {
11644 got->rawsize = got->size;
11645 got->size = 0;
11646 relgot = ppc64_elf_tdata (ibfd)->relgot;
11647 relgot->rawsize = relgot->size;
11648 relgot->size = 0;
11649 }
11650 }
11651
11652 /* Now reallocate the got, local syms first. We don't need to
11653 allocate section contents again since we never increase size. */
11654 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11655 {
11656 struct got_entry **lgot_ents;
11657 struct got_entry **end_lgot_ents;
11658 struct plt_entry **local_plt;
11659 struct plt_entry **end_local_plt;
11660 unsigned char *lgot_masks;
11661 bfd_size_type locsymcount;
11662 Elf_Internal_Shdr *symtab_hdr;
11663 asection *s;
11664
11665 if (!is_ppc64_elf (ibfd))
11666 continue;
11667
11668 lgot_ents = elf_local_got_ents (ibfd);
11669 if (!lgot_ents)
11670 continue;
11671
11672 symtab_hdr = &elf_symtab_hdr (ibfd);
11673 locsymcount = symtab_hdr->sh_info;
11674 end_lgot_ents = lgot_ents + locsymcount;
11675 local_plt = (struct plt_entry **) end_lgot_ents;
11676 end_local_plt = local_plt + locsymcount;
11677 lgot_masks = (unsigned char *) end_local_plt;
11678 s = ppc64_elf_tdata (ibfd)->got;
11679 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11680 {
11681 struct got_entry *ent;
11682
11683 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11684 {
11685 unsigned int ent_size = 8;
11686 unsigned int rel_size = sizeof (Elf64_External_Rela);
11687
11688 ent->got.offset = s->size;
11689 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11690 {
11691 ent_size *= 2;
11692 rel_size *= 2;
11693 }
11694 s->size += ent_size;
11695 if ((*lgot_masks & PLT_IFUNC) != 0)
11696 {
11697 htab->elf.irelplt->size += rel_size;
11698 htab->got_reli_size += rel_size;
11699 }
11700 else if (bfd_link_pic (info))
11701 {
11702 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11703 srel->size += rel_size;
11704 }
11705 }
11706 }
11707 }
11708
11709 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11710
11711 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11712 {
11713 struct got_entry *ent;
11714
11715 if (!is_ppc64_elf (ibfd))
11716 continue;
11717
11718 ent = ppc64_tlsld_got (ibfd);
11719 if (!ent->is_indirect
11720 && ent->got.offset != (bfd_vma) -1)
11721 {
11722 asection *s = ppc64_elf_tdata (ibfd)->got;
11723 ent->got.offset = s->size;
11724 s->size += 16;
11725 if (bfd_link_pic (info))
11726 {
11727 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11728 srel->size += sizeof (Elf64_External_Rela);
11729 }
11730 }
11731 }
11732
11733 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11734 if (!done_something)
11735 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11736 {
11737 asection *got;
11738
11739 if (!is_ppc64_elf (ibfd))
11740 continue;
11741
11742 got = ppc64_elf_tdata (ibfd)->got;
11743 if (got != NULL)
11744 {
11745 done_something = got->rawsize != got->size;
11746 if (done_something)
11747 break;
11748 }
11749 }
11750
11751 if (done_something)
11752 (*htab->params->layout_sections_again) ();
11753
11754 /* Set up for second pass over toc sections to recalculate elf_gp
11755 on input sections. */
11756 htab->toc_bfd = NULL;
11757 htab->toc_first_sec = NULL;
11758 htab->second_toc_pass = TRUE;
11759 return done_something;
11760 }
11761
11762 /* Called after second pass of multitoc partitioning. */
11763
11764 void
11765 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11766 {
11767 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11768
11769 /* After the second pass, toc_curr tracks the TOC offset used
11770 for code sections below in ppc64_elf_next_input_section. */
11771 htab->toc_curr = TOC_BASE_OFF;
11772 }
11773
11774 /* No toc references were found in ISEC. If the code in ISEC makes no
11775 calls, then there's no need to use toc adjusting stubs when branching
11776 into ISEC. Actually, indirect calls from ISEC are OK as they will
11777 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11778 needed, and 2 if a cyclical call-graph was found but no other reason
11779 for a stub was detected. If called from the top level, a return of
11780 2 means the same as a return of 0. */
11781
11782 static int
11783 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11784 {
11785 int ret;
11786
11787 /* Mark this section as checked. */
11788 isec->call_check_done = 1;
11789
11790 /* We know none of our code bearing sections will need toc stubs. */
11791 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11792 return 0;
11793
11794 if (isec->size == 0)
11795 return 0;
11796
11797 if (isec->output_section == NULL)
11798 return 0;
11799
11800 ret = 0;
11801 if (isec->reloc_count != 0)
11802 {
11803 Elf_Internal_Rela *relstart, *rel;
11804 Elf_Internal_Sym *local_syms;
11805 struct ppc_link_hash_table *htab;
11806
11807 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11808 info->keep_memory);
11809 if (relstart == NULL)
11810 return -1;
11811
11812 /* Look for branches to outside of this section. */
11813 local_syms = NULL;
11814 htab = ppc_hash_table (info);
11815 if (htab == NULL)
11816 return -1;
11817
11818 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11819 {
11820 enum elf_ppc64_reloc_type r_type;
11821 unsigned long r_symndx;
11822 struct elf_link_hash_entry *h;
11823 struct ppc_link_hash_entry *eh;
11824 Elf_Internal_Sym *sym;
11825 asection *sym_sec;
11826 struct _opd_sec_data *opd;
11827 bfd_vma sym_value;
11828 bfd_vma dest;
11829
11830 r_type = ELF64_R_TYPE (rel->r_info);
11831 if (r_type != R_PPC64_REL24
11832 && r_type != R_PPC64_REL14
11833 && r_type != R_PPC64_REL14_BRTAKEN
11834 && r_type != R_PPC64_REL14_BRNTAKEN)
11835 continue;
11836
11837 r_symndx = ELF64_R_SYM (rel->r_info);
11838 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11839 isec->owner))
11840 {
11841 ret = -1;
11842 break;
11843 }
11844
11845 /* Calls to dynamic lib functions go through a plt call stub
11846 that uses r2. */
11847 eh = (struct ppc_link_hash_entry *) h;
11848 if (eh != NULL
11849 && (eh->elf.plt.plist != NULL
11850 || (eh->oh != NULL
11851 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11852 {
11853 ret = 1;
11854 break;
11855 }
11856
11857 if (sym_sec == NULL)
11858 /* Ignore other undefined symbols. */
11859 continue;
11860
11861 /* Assume branches to other sections not included in the
11862 link need stubs too, to cover -R and absolute syms. */
11863 if (sym_sec->output_section == NULL)
11864 {
11865 ret = 1;
11866 break;
11867 }
11868
11869 if (h == NULL)
11870 sym_value = sym->st_value;
11871 else
11872 {
11873 if (h->root.type != bfd_link_hash_defined
11874 && h->root.type != bfd_link_hash_defweak)
11875 abort ();
11876 sym_value = h->root.u.def.value;
11877 }
11878 sym_value += rel->r_addend;
11879
11880 /* If this branch reloc uses an opd sym, find the code section. */
11881 opd = get_opd_info (sym_sec);
11882 if (opd != NULL)
11883 {
11884 if (h == NULL && opd->adjust != NULL)
11885 {
11886 long adjust;
11887
11888 adjust = opd->adjust[OPD_NDX (sym_value)];
11889 if (adjust == -1)
11890 /* Assume deleted functions won't ever be called. */
11891 continue;
11892 sym_value += adjust;
11893 }
11894
11895 dest = opd_entry_value (sym_sec, sym_value,
11896 &sym_sec, NULL, FALSE);
11897 if (dest == (bfd_vma) -1)
11898 continue;
11899 }
11900 else
11901 dest = (sym_value
11902 + sym_sec->output_offset
11903 + sym_sec->output_section->vma);
11904
11905 /* Ignore branch to self. */
11906 if (sym_sec == isec)
11907 continue;
11908
11909 /* If the called function uses the toc, we need a stub. */
11910 if (sym_sec->has_toc_reloc
11911 || sym_sec->makes_toc_func_call)
11912 {
11913 ret = 1;
11914 break;
11915 }
11916
11917 /* Assume any branch that needs a long branch stub might in fact
11918 need a plt_branch stub. A plt_branch stub uses r2. */
11919 else if (dest - (isec->output_offset
11920 + isec->output_section->vma
11921 + rel->r_offset) + (1 << 25)
11922 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11923 ? h->other
11924 : sym->st_other))
11925 {
11926 ret = 1;
11927 break;
11928 }
11929
11930 /* If calling back to a section in the process of being
11931 tested, we can't say for sure that no toc adjusting stubs
11932 are needed, so don't return zero. */
11933 else if (sym_sec->call_check_in_progress)
11934 ret = 2;
11935
11936 /* Branches to another section that itself doesn't have any TOC
11937 references are OK. Recursively call ourselves to check. */
11938 else if (!sym_sec->call_check_done)
11939 {
11940 int recur;
11941
11942 /* Mark current section as indeterminate, so that other
11943 sections that call back to current won't be marked as
11944 known. */
11945 isec->call_check_in_progress = 1;
11946 recur = toc_adjusting_stub_needed (info, sym_sec);
11947 isec->call_check_in_progress = 0;
11948
11949 if (recur != 0)
11950 {
11951 ret = recur;
11952 if (recur != 2)
11953 break;
11954 }
11955 }
11956 }
11957
11958 if (local_syms != NULL
11959 && (elf_symtab_hdr (isec->owner).contents
11960 != (unsigned char *) local_syms))
11961 free (local_syms);
11962 if (elf_section_data (isec)->relocs != relstart)
11963 free (relstart);
11964 }
11965
11966 if ((ret & 1) == 0
11967 && isec->map_head.s != NULL
11968 && (strcmp (isec->output_section->name, ".init") == 0
11969 || strcmp (isec->output_section->name, ".fini") == 0))
11970 {
11971 if (isec->map_head.s->has_toc_reloc
11972 || isec->map_head.s->makes_toc_func_call)
11973 ret = 1;
11974 else if (!isec->map_head.s->call_check_done)
11975 {
11976 int recur;
11977 isec->call_check_in_progress = 1;
11978 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11979 isec->call_check_in_progress = 0;
11980 if (recur != 0)
11981 ret = recur;
11982 }
11983 }
11984
11985 if (ret == 1)
11986 isec->makes_toc_func_call = 1;
11987
11988 return ret;
11989 }
11990
11991 /* The linker repeatedly calls this function for each input section,
11992 in the order that input sections are linked into output sections.
11993 Build lists of input sections to determine groupings between which
11994 we may insert linker stubs. */
11995
11996 bfd_boolean
11997 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11998 {
11999 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12000
12001 if (htab == NULL)
12002 return FALSE;
12003
12004 if ((isec->output_section->flags & SEC_CODE) != 0
12005 && isec->output_section->id < htab->sec_info_arr_size)
12006 {
12007 /* This happens to make the list in reverse order,
12008 which is what we want. */
12009 htab->sec_info[isec->id].u.list
12010 = htab->sec_info[isec->output_section->id].u.list;
12011 htab->sec_info[isec->output_section->id].u.list = isec;
12012 }
12013
12014 if (htab->multi_toc_needed)
12015 {
12016 /* Analyse sections that aren't already flagged as needing a
12017 valid toc pointer. Exclude .fixup for the linux kernel.
12018 .fixup contains branches, but only back to the function that
12019 hit an exception. */
12020 if (!(isec->has_toc_reloc
12021 || (isec->flags & SEC_CODE) == 0
12022 || strcmp (isec->name, ".fixup") == 0
12023 || isec->call_check_done))
12024 {
12025 if (toc_adjusting_stub_needed (info, isec) < 0)
12026 return FALSE;
12027 }
12028 /* Make all sections use the TOC assigned for this object file.
12029 This will be wrong for pasted sections; We fix that in
12030 check_pasted_section(). */
12031 if (elf_gp (isec->owner) != 0)
12032 htab->toc_curr = elf_gp (isec->owner);
12033 }
12034
12035 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12036 return TRUE;
12037 }
12038
12039 /* Check that all .init and .fini sections use the same toc, if they
12040 have toc relocs. */
12041
12042 static bfd_boolean
12043 check_pasted_section (struct bfd_link_info *info, const char *name)
12044 {
12045 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12046
12047 if (o != NULL)
12048 {
12049 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12050 bfd_vma toc_off = 0;
12051 asection *i;
12052
12053 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12054 if (i->has_toc_reloc)
12055 {
12056 if (toc_off == 0)
12057 toc_off = htab->sec_info[i->id].toc_off;
12058 else if (toc_off != htab->sec_info[i->id].toc_off)
12059 return FALSE;
12060 }
12061
12062 if (toc_off == 0)
12063 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12064 if (i->makes_toc_func_call)
12065 {
12066 toc_off = htab->sec_info[i->id].toc_off;
12067 break;
12068 }
12069
12070 /* Make sure the whole pasted function uses the same toc offset. */
12071 if (toc_off != 0)
12072 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12073 htab->sec_info[i->id].toc_off = toc_off;
12074 }
12075 return TRUE;
12076 }
12077
12078 bfd_boolean
12079 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12080 {
12081 return (check_pasted_section (info, ".init")
12082 & check_pasted_section (info, ".fini"));
12083 }
12084
12085 /* See whether we can group stub sections together. Grouping stub
12086 sections may result in fewer stubs. More importantly, we need to
12087 put all .init* and .fini* stubs at the beginning of the .init or
12088 .fini output sections respectively, because glibc splits the
12089 _init and _fini functions into multiple parts. Putting a stub in
12090 the middle of a function is not a good idea. */
12091
12092 static bfd_boolean
12093 group_sections (struct bfd_link_info *info,
12094 bfd_size_type stub_group_size,
12095 bfd_boolean stubs_always_before_branch)
12096 {
12097 struct ppc_link_hash_table *htab;
12098 asection *osec;
12099 bfd_boolean suppress_size_errors;
12100
12101 htab = ppc_hash_table (info);
12102 if (htab == NULL)
12103 return FALSE;
12104
12105 suppress_size_errors = FALSE;
12106 if (stub_group_size == 1)
12107 {
12108 /* Default values. */
12109 if (stubs_always_before_branch)
12110 stub_group_size = 0x1e00000;
12111 else
12112 stub_group_size = 0x1c00000;
12113 suppress_size_errors = TRUE;
12114 }
12115
12116 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12117 {
12118 asection *tail;
12119
12120 if (osec->id >= htab->sec_info_arr_size)
12121 continue;
12122
12123 tail = htab->sec_info[osec->id].u.list;
12124 while (tail != NULL)
12125 {
12126 asection *curr;
12127 asection *prev;
12128 bfd_size_type total;
12129 bfd_boolean big_sec;
12130 bfd_vma curr_toc;
12131 struct map_stub *group;
12132 bfd_size_type group_size;
12133
12134 curr = tail;
12135 total = tail->size;
12136 group_size = (ppc64_elf_section_data (tail) != NULL
12137 && ppc64_elf_section_data (tail)->has_14bit_branch
12138 ? stub_group_size >> 10 : stub_group_size);
12139
12140 big_sec = total > group_size;
12141 if (big_sec && !suppress_size_errors)
12142 /* xgettext:c-format */
12143 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12144 tail->owner, tail);
12145 curr_toc = htab->sec_info[tail->id].toc_off;
12146
12147 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12148 && ((total += curr->output_offset - prev->output_offset)
12149 < (ppc64_elf_section_data (prev) != NULL
12150 && ppc64_elf_section_data (prev)->has_14bit_branch
12151 ? (group_size = stub_group_size >> 10) : group_size))
12152 && htab->sec_info[prev->id].toc_off == curr_toc)
12153 curr = prev;
12154
12155 /* OK, the size from the start of CURR to the end is less
12156 than group_size and thus can be handled by one stub
12157 section. (or the tail section is itself larger than
12158 group_size, in which case we may be toast.) We should
12159 really be keeping track of the total size of stubs added
12160 here, as stubs contribute to the final output section
12161 size. That's a little tricky, and this way will only
12162 break if stubs added make the total size more than 2^25,
12163 ie. for the default stub_group_size, if stubs total more
12164 than 2097152 bytes, or nearly 75000 plt call stubs. */
12165 group = bfd_alloc (curr->owner, sizeof (*group));
12166 if (group == NULL)
12167 return FALSE;
12168 group->link_sec = curr;
12169 group->stub_sec = NULL;
12170 group->needs_save_res = 0;
12171 group->next = htab->group;
12172 htab->group = group;
12173 do
12174 {
12175 prev = htab->sec_info[tail->id].u.list;
12176 /* Set up this stub group. */
12177 htab->sec_info[tail->id].u.group = group;
12178 }
12179 while (tail != curr && (tail = prev) != NULL);
12180
12181 /* But wait, there's more! Input sections up to group_size
12182 bytes before the stub section can be handled by it too.
12183 Don't do this if we have a really large section after the
12184 stubs, as adding more stubs increases the chance that
12185 branches may not reach into the stub section. */
12186 if (!stubs_always_before_branch && !big_sec)
12187 {
12188 total = 0;
12189 while (prev != NULL
12190 && ((total += tail->output_offset - prev->output_offset)
12191 < (ppc64_elf_section_data (prev) != NULL
12192 && ppc64_elf_section_data (prev)->has_14bit_branch
12193 ? (group_size = stub_group_size >> 10) : group_size))
12194 && htab->sec_info[prev->id].toc_off == curr_toc)
12195 {
12196 tail = prev;
12197 prev = htab->sec_info[tail->id].u.list;
12198 htab->sec_info[tail->id].u.group = group;
12199 }
12200 }
12201 tail = prev;
12202 }
12203 }
12204 return TRUE;
12205 }
12206
12207 static const unsigned char glink_eh_frame_cie[] =
12208 {
12209 0, 0, 0, 16, /* length. */
12210 0, 0, 0, 0, /* id. */
12211 1, /* CIE version. */
12212 'z', 'R', 0, /* Augmentation string. */
12213 4, /* Code alignment. */
12214 0x78, /* Data alignment. */
12215 65, /* RA reg. */
12216 1, /* Augmentation size. */
12217 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12218 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12219 0, 0, 0, 0
12220 };
12221
12222 /* Stripping output sections is normally done before dynamic section
12223 symbols have been allocated. This function is called later, and
12224 handles cases like htab->brlt which is mapped to its own output
12225 section. */
12226
12227 static void
12228 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12229 {
12230 if (isec->size == 0
12231 && isec->output_section->size == 0
12232 && !(isec->output_section->flags & SEC_KEEP)
12233 && !bfd_section_removed_from_list (info->output_bfd,
12234 isec->output_section)
12235 && elf_section_data (isec->output_section)->dynindx == 0)
12236 {
12237 isec->output_section->flags |= SEC_EXCLUDE;
12238 bfd_section_list_remove (info->output_bfd, isec->output_section);
12239 info->output_bfd->section_count--;
12240 }
12241 }
12242
12243 /* Determine and set the size of the stub section for a final link.
12244
12245 The basic idea here is to examine all the relocations looking for
12246 PC-relative calls to a target that is unreachable with a "bl"
12247 instruction. */
12248
12249 bfd_boolean
12250 ppc64_elf_size_stubs (struct bfd_link_info *info)
12251 {
12252 bfd_size_type stub_group_size;
12253 bfd_boolean stubs_always_before_branch;
12254 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12255
12256 if (htab == NULL)
12257 return FALSE;
12258
12259 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12260 htab->params->plt_thread_safe = 1;
12261 if (!htab->opd_abi)
12262 htab->params->plt_thread_safe = 0;
12263 else if (htab->params->plt_thread_safe == -1)
12264 {
12265 static const char *const thread_starter[] =
12266 {
12267 "pthread_create",
12268 /* libstdc++ */
12269 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12270 /* librt */
12271 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12272 "mq_notify", "create_timer",
12273 /* libanl */
12274 "getaddrinfo_a",
12275 /* libgomp */
12276 "GOMP_parallel",
12277 "GOMP_parallel_start",
12278 "GOMP_parallel_loop_static",
12279 "GOMP_parallel_loop_static_start",
12280 "GOMP_parallel_loop_dynamic",
12281 "GOMP_parallel_loop_dynamic_start",
12282 "GOMP_parallel_loop_guided",
12283 "GOMP_parallel_loop_guided_start",
12284 "GOMP_parallel_loop_runtime",
12285 "GOMP_parallel_loop_runtime_start",
12286 "GOMP_parallel_sections",
12287 "GOMP_parallel_sections_start",
12288 /* libgo */
12289 "__go_go",
12290 };
12291 unsigned i;
12292
12293 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12294 {
12295 struct elf_link_hash_entry *h;
12296 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12297 FALSE, FALSE, TRUE);
12298 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12299 if (htab->params->plt_thread_safe)
12300 break;
12301 }
12302 }
12303 stubs_always_before_branch = htab->params->group_size < 0;
12304 if (htab->params->group_size < 0)
12305 stub_group_size = -htab->params->group_size;
12306 else
12307 stub_group_size = htab->params->group_size;
12308
12309 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12310 return FALSE;
12311
12312 #define STUB_SHRINK_ITER 20
12313 /* Loop until no stubs added. After iteration 20 of this loop we may
12314 exit on a stub section shrinking. This is to break out of a
12315 pathological case where adding stubs on one iteration decreases
12316 section gaps (perhaps due to alignment), which then requires
12317 fewer or smaller stubs on the next iteration. */
12318
12319 while (1)
12320 {
12321 bfd *input_bfd;
12322 unsigned int bfd_indx;
12323 struct map_stub *group;
12324 asection *stub_sec;
12325
12326 htab->stub_iteration += 1;
12327
12328 for (input_bfd = info->input_bfds, bfd_indx = 0;
12329 input_bfd != NULL;
12330 input_bfd = input_bfd->link.next, bfd_indx++)
12331 {
12332 Elf_Internal_Shdr *symtab_hdr;
12333 asection *section;
12334 Elf_Internal_Sym *local_syms = NULL;
12335
12336 if (!is_ppc64_elf (input_bfd))
12337 continue;
12338
12339 /* We'll need the symbol table in a second. */
12340 symtab_hdr = &elf_symtab_hdr (input_bfd);
12341 if (symtab_hdr->sh_info == 0)
12342 continue;
12343
12344 /* Walk over each section attached to the input bfd. */
12345 for (section = input_bfd->sections;
12346 section != NULL;
12347 section = section->next)
12348 {
12349 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12350
12351 /* If there aren't any relocs, then there's nothing more
12352 to do. */
12353 if ((section->flags & SEC_RELOC) == 0
12354 || (section->flags & SEC_ALLOC) == 0
12355 || (section->flags & SEC_LOAD) == 0
12356 || (section->flags & SEC_CODE) == 0
12357 || section->reloc_count == 0)
12358 continue;
12359
12360 /* If this section is a link-once section that will be
12361 discarded, then don't create any stubs. */
12362 if (section->output_section == NULL
12363 || section->output_section->owner != info->output_bfd)
12364 continue;
12365
12366 /* Get the relocs. */
12367 internal_relocs
12368 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12369 info->keep_memory);
12370 if (internal_relocs == NULL)
12371 goto error_ret_free_local;
12372
12373 /* Now examine each relocation. */
12374 irela = internal_relocs;
12375 irelaend = irela + section->reloc_count;
12376 for (; irela < irelaend; irela++)
12377 {
12378 enum elf_ppc64_reloc_type r_type;
12379 unsigned int r_indx;
12380 enum ppc_stub_type stub_type;
12381 struct ppc_stub_hash_entry *stub_entry;
12382 asection *sym_sec, *code_sec;
12383 bfd_vma sym_value, code_value;
12384 bfd_vma destination;
12385 unsigned long local_off;
12386 bfd_boolean ok_dest;
12387 struct ppc_link_hash_entry *hash;
12388 struct ppc_link_hash_entry *fdh;
12389 struct elf_link_hash_entry *h;
12390 Elf_Internal_Sym *sym;
12391 char *stub_name;
12392 const asection *id_sec;
12393 struct _opd_sec_data *opd;
12394 struct plt_entry *plt_ent;
12395
12396 r_type = ELF64_R_TYPE (irela->r_info);
12397 r_indx = ELF64_R_SYM (irela->r_info);
12398
12399 if (r_type >= R_PPC64_max)
12400 {
12401 bfd_set_error (bfd_error_bad_value);
12402 goto error_ret_free_internal;
12403 }
12404
12405 /* Only look for stubs on branch instructions. */
12406 if (r_type != R_PPC64_REL24
12407 && r_type != R_PPC64_REL14
12408 && r_type != R_PPC64_REL14_BRTAKEN
12409 && r_type != R_PPC64_REL14_BRNTAKEN)
12410 continue;
12411
12412 /* Now determine the call target, its name, value,
12413 section. */
12414 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12415 r_indx, input_bfd))
12416 goto error_ret_free_internal;
12417 hash = (struct ppc_link_hash_entry *) h;
12418
12419 ok_dest = FALSE;
12420 fdh = NULL;
12421 sym_value = 0;
12422 if (hash == NULL)
12423 {
12424 sym_value = sym->st_value;
12425 if (sym_sec != NULL
12426 && sym_sec->output_section != NULL)
12427 ok_dest = TRUE;
12428 }
12429 else if (hash->elf.root.type == bfd_link_hash_defined
12430 || hash->elf.root.type == bfd_link_hash_defweak)
12431 {
12432 sym_value = hash->elf.root.u.def.value;
12433 if (sym_sec->output_section != NULL)
12434 ok_dest = TRUE;
12435 }
12436 else if (hash->elf.root.type == bfd_link_hash_undefweak
12437 || hash->elf.root.type == bfd_link_hash_undefined)
12438 {
12439 /* Recognise an old ABI func code entry sym, and
12440 use the func descriptor sym instead if it is
12441 defined. */
12442 if (hash->elf.root.root.string[0] == '.'
12443 && hash->oh != NULL)
12444 {
12445 fdh = ppc_follow_link (hash->oh);
12446 if (fdh->elf.root.type == bfd_link_hash_defined
12447 || fdh->elf.root.type == bfd_link_hash_defweak)
12448 {
12449 sym_sec = fdh->elf.root.u.def.section;
12450 sym_value = fdh->elf.root.u.def.value;
12451 if (sym_sec->output_section != NULL)
12452 ok_dest = TRUE;
12453 }
12454 else
12455 fdh = NULL;
12456 }
12457 }
12458 else
12459 {
12460 bfd_set_error (bfd_error_bad_value);
12461 goto error_ret_free_internal;
12462 }
12463
12464 destination = 0;
12465 local_off = 0;
12466 if (ok_dest)
12467 {
12468 sym_value += irela->r_addend;
12469 destination = (sym_value
12470 + sym_sec->output_offset
12471 + sym_sec->output_section->vma);
12472 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12473 ? hash->elf.other
12474 : sym->st_other);
12475 }
12476
12477 code_sec = sym_sec;
12478 code_value = sym_value;
12479 opd = get_opd_info (sym_sec);
12480 if (opd != NULL)
12481 {
12482 bfd_vma dest;
12483
12484 if (hash == NULL && opd->adjust != NULL)
12485 {
12486 long adjust = opd->adjust[OPD_NDX (sym_value)];
12487 if (adjust == -1)
12488 continue;
12489 code_value += adjust;
12490 sym_value += adjust;
12491 }
12492 dest = opd_entry_value (sym_sec, sym_value,
12493 &code_sec, &code_value, FALSE);
12494 if (dest != (bfd_vma) -1)
12495 {
12496 destination = dest;
12497 if (fdh != NULL)
12498 {
12499 /* Fixup old ABI sym to point at code
12500 entry. */
12501 hash->elf.root.type = bfd_link_hash_defweak;
12502 hash->elf.root.u.def.section = code_sec;
12503 hash->elf.root.u.def.value = code_value;
12504 }
12505 }
12506 }
12507
12508 /* Determine what (if any) linker stub is needed. */
12509 plt_ent = NULL;
12510 stub_type = ppc_type_of_stub (section, irela, &hash,
12511 &plt_ent, destination,
12512 local_off);
12513
12514 if (stub_type != ppc_stub_plt_call)
12515 {
12516 /* Check whether we need a TOC adjusting stub.
12517 Since the linker pastes together pieces from
12518 different object files when creating the
12519 _init and _fini functions, it may be that a
12520 call to what looks like a local sym is in
12521 fact a call needing a TOC adjustment. */
12522 if (code_sec != NULL
12523 && code_sec->output_section != NULL
12524 && (htab->sec_info[code_sec->id].toc_off
12525 != htab->sec_info[section->id].toc_off)
12526 && (code_sec->has_toc_reloc
12527 || code_sec->makes_toc_func_call))
12528 stub_type = ppc_stub_long_branch_r2off;
12529 }
12530
12531 if (stub_type == ppc_stub_none)
12532 continue;
12533
12534 /* __tls_get_addr calls might be eliminated. */
12535 if (stub_type != ppc_stub_plt_call
12536 && hash != NULL
12537 && (hash == htab->tls_get_addr
12538 || hash == htab->tls_get_addr_fd)
12539 && section->has_tls_reloc
12540 && irela != internal_relocs)
12541 {
12542 /* Get tls info. */
12543 unsigned char *tls_mask;
12544
12545 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12546 irela - 1, input_bfd))
12547 goto error_ret_free_internal;
12548 if (*tls_mask != 0)
12549 continue;
12550 }
12551
12552 if (stub_type == ppc_stub_plt_call
12553 && irela + 1 < irelaend
12554 && irela[1].r_offset == irela->r_offset + 4
12555 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12556 {
12557 if (!tocsave_find (htab, INSERT,
12558 &local_syms, irela + 1, input_bfd))
12559 goto error_ret_free_internal;
12560 }
12561 else if (stub_type == ppc_stub_plt_call)
12562 stub_type = ppc_stub_plt_call_r2save;
12563
12564 /* Support for grouping stub sections. */
12565 id_sec = htab->sec_info[section->id].u.group->link_sec;
12566
12567 /* Get the name of this stub. */
12568 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12569 if (!stub_name)
12570 goto error_ret_free_internal;
12571
12572 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12573 stub_name, FALSE, FALSE);
12574 if (stub_entry != NULL)
12575 {
12576 /* The proper stub has already been created. */
12577 free (stub_name);
12578 if (stub_type == ppc_stub_plt_call_r2save)
12579 stub_entry->stub_type = stub_type;
12580 continue;
12581 }
12582
12583 stub_entry = ppc_add_stub (stub_name, section, info);
12584 if (stub_entry == NULL)
12585 {
12586 free (stub_name);
12587 error_ret_free_internal:
12588 if (elf_section_data (section)->relocs == NULL)
12589 free (internal_relocs);
12590 error_ret_free_local:
12591 if (local_syms != NULL
12592 && (symtab_hdr->contents
12593 != (unsigned char *) local_syms))
12594 free (local_syms);
12595 return FALSE;
12596 }
12597
12598 stub_entry->stub_type = stub_type;
12599 if (stub_type != ppc_stub_plt_call
12600 && stub_type != ppc_stub_plt_call_r2save)
12601 {
12602 stub_entry->target_value = code_value;
12603 stub_entry->target_section = code_sec;
12604 }
12605 else
12606 {
12607 stub_entry->target_value = sym_value;
12608 stub_entry->target_section = sym_sec;
12609 }
12610 stub_entry->h = hash;
12611 stub_entry->plt_ent = plt_ent;
12612 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12613
12614 if (stub_entry->h != NULL)
12615 htab->stub_globals += 1;
12616 }
12617
12618 /* We're done with the internal relocs, free them. */
12619 if (elf_section_data (section)->relocs != internal_relocs)
12620 free (internal_relocs);
12621 }
12622
12623 if (local_syms != NULL
12624 && symtab_hdr->contents != (unsigned char *) local_syms)
12625 {
12626 if (!info->keep_memory)
12627 free (local_syms);
12628 else
12629 symtab_hdr->contents = (unsigned char *) local_syms;
12630 }
12631 }
12632
12633 /* We may have added some stubs. Find out the new size of the
12634 stub sections. */
12635 for (stub_sec = htab->params->stub_bfd->sections;
12636 stub_sec != NULL;
12637 stub_sec = stub_sec->next)
12638 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12639 {
12640 if (htab->stub_iteration <= STUB_SHRINK_ITER
12641 || stub_sec->rawsize < stub_sec->size)
12642 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12643 stub_sec->rawsize = stub_sec->size;
12644 stub_sec->size = 0;
12645 stub_sec->reloc_count = 0;
12646 stub_sec->flags &= ~SEC_RELOC;
12647 }
12648
12649 htab->brlt->size = 0;
12650 htab->brlt->reloc_count = 0;
12651 htab->brlt->flags &= ~SEC_RELOC;
12652 if (htab->relbrlt != NULL)
12653 htab->relbrlt->size = 0;
12654
12655 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12656
12657 for (group = htab->group; group != NULL; group = group->next)
12658 if (group->needs_save_res)
12659 group->stub_sec->size += htab->sfpr->size;
12660
12661 if (info->emitrelocations
12662 && htab->glink != NULL && htab->glink->size != 0)
12663 {
12664 htab->glink->reloc_count = 1;
12665 htab->glink->flags |= SEC_RELOC;
12666 }
12667
12668 if (htab->glink_eh_frame != NULL
12669 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12670 && htab->glink_eh_frame->output_section->size != 0)
12671 {
12672 size_t size = 0, align;
12673
12674 for (stub_sec = htab->params->stub_bfd->sections;
12675 stub_sec != NULL;
12676 stub_sec = stub_sec->next)
12677 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12678 size += 24;
12679 if (htab->glink != NULL && htab->glink->size != 0)
12680 size += 24;
12681 if (size != 0)
12682 size += sizeof (glink_eh_frame_cie);
12683 align = 1;
12684 align <<= htab->glink_eh_frame->output_section->alignment_power;
12685 align -= 1;
12686 size = (size + align) & ~align;
12687 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12688 htab->glink_eh_frame->size = size;
12689 }
12690
12691 if (htab->params->plt_stub_align != 0)
12692 for (stub_sec = htab->params->stub_bfd->sections;
12693 stub_sec != NULL;
12694 stub_sec = stub_sec->next)
12695 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12696 stub_sec->size = ((stub_sec->size
12697 + (1 << htab->params->plt_stub_align) - 1)
12698 & -(1 << htab->params->plt_stub_align));
12699
12700 for (stub_sec = htab->params->stub_bfd->sections;
12701 stub_sec != NULL;
12702 stub_sec = stub_sec->next)
12703 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12704 && stub_sec->rawsize != stub_sec->size
12705 && (htab->stub_iteration <= STUB_SHRINK_ITER
12706 || stub_sec->rawsize < stub_sec->size))
12707 break;
12708
12709 if (stub_sec == NULL
12710 && (htab->glink_eh_frame == NULL
12711 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12712 break;
12713
12714 /* Ask the linker to do its stuff. */
12715 (*htab->params->layout_sections_again) ();
12716 }
12717
12718 if (htab->glink_eh_frame != NULL
12719 && htab->glink_eh_frame->size != 0)
12720 {
12721 bfd_vma val;
12722 bfd_byte *p, *last_fde;
12723 size_t last_fde_len, size, align, pad;
12724 asection *stub_sec;
12725
12726 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12727 if (p == NULL)
12728 return FALSE;
12729 htab->glink_eh_frame->contents = p;
12730 last_fde = p;
12731
12732 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12733 /* CIE length (rewrite in case little-endian). */
12734 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12735 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12736 p += sizeof (glink_eh_frame_cie);
12737
12738 for (stub_sec = htab->params->stub_bfd->sections;
12739 stub_sec != NULL;
12740 stub_sec = stub_sec->next)
12741 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12742 {
12743 last_fde = p;
12744 last_fde_len = 20;
12745 /* FDE length. */
12746 bfd_put_32 (htab->elf.dynobj, 20, p);
12747 p += 4;
12748 /* CIE pointer. */
12749 val = p - htab->glink_eh_frame->contents;
12750 bfd_put_32 (htab->elf.dynobj, val, p);
12751 p += 4;
12752 /* Offset to stub section, written later. */
12753 p += 4;
12754 /* stub section size. */
12755 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12756 p += 4;
12757 /* Augmentation. */
12758 p += 1;
12759 /* Pad. */
12760 p += 7;
12761 }
12762 if (htab->glink != NULL && htab->glink->size != 0)
12763 {
12764 last_fde = p;
12765 last_fde_len = 20;
12766 /* FDE length. */
12767 bfd_put_32 (htab->elf.dynobj, 20, 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 .glink, written later. */
12774 p += 4;
12775 /* .glink size. */
12776 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12777 p += 4;
12778 /* Augmentation. */
12779 p += 1;
12780
12781 *p++ = DW_CFA_advance_loc + 1;
12782 *p++ = DW_CFA_register;
12783 *p++ = 65;
12784 *p++ = htab->opd_abi ? 12 : 0;
12785 *p++ = DW_CFA_advance_loc + 4;
12786 *p++ = DW_CFA_restore_extended;
12787 *p++ = 65;
12788 }
12789 /* Subsume any padding into the last FDE if user .eh_frame
12790 sections are aligned more than glink_eh_frame. Otherwise any
12791 zero padding will be seen as a terminator. */
12792 size = p - htab->glink_eh_frame->contents;
12793 align = 1;
12794 align <<= htab->glink_eh_frame->output_section->alignment_power;
12795 align -= 1;
12796 pad = ((size + align) & ~align) - size;
12797 htab->glink_eh_frame->size = size + pad;
12798 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12799 }
12800
12801 maybe_strip_output (info, htab->brlt);
12802 if (htab->glink_eh_frame != NULL)
12803 maybe_strip_output (info, htab->glink_eh_frame);
12804
12805 return TRUE;
12806 }
12807
12808 /* Called after we have determined section placement. If sections
12809 move, we'll be called again. Provide a value for TOCstart. */
12810
12811 bfd_vma
12812 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12813 {
12814 asection *s;
12815 bfd_vma TOCstart, adjust;
12816
12817 if (info != NULL)
12818 {
12819 struct elf_link_hash_entry *h;
12820 struct elf_link_hash_table *htab = elf_hash_table (info);
12821
12822 if (is_elf_hash_table (htab)
12823 && htab->hgot != NULL)
12824 h = htab->hgot;
12825 else
12826 {
12827 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12828 if (is_elf_hash_table (htab))
12829 htab->hgot = h;
12830 }
12831 if (h != NULL
12832 && h->root.type == bfd_link_hash_defined
12833 && !h->root.linker_def
12834 && (!is_elf_hash_table (htab)
12835 || h->def_regular))
12836 {
12837 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12838 + h->root.u.def.section->output_offset
12839 + h->root.u.def.section->output_section->vma);
12840 _bfd_set_gp_value (obfd, TOCstart);
12841 return TOCstart;
12842 }
12843 }
12844
12845 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12846 order. The TOC starts where the first of these sections starts. */
12847 s = bfd_get_section_by_name (obfd, ".got");
12848 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12849 s = bfd_get_section_by_name (obfd, ".toc");
12850 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12851 s = bfd_get_section_by_name (obfd, ".tocbss");
12852 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12853 s = bfd_get_section_by_name (obfd, ".plt");
12854 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12855 {
12856 /* This may happen for
12857 o references to TOC base (SYM@toc / TOC[tc0]) without a
12858 .toc directive
12859 o bad linker script
12860 o --gc-sections and empty TOC sections
12861
12862 FIXME: Warn user? */
12863
12864 /* Look for a likely section. We probably won't even be
12865 using TOCstart. */
12866 for (s = obfd->sections; s != NULL; s = s->next)
12867 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12868 | SEC_EXCLUDE))
12869 == (SEC_ALLOC | SEC_SMALL_DATA))
12870 break;
12871 if (s == NULL)
12872 for (s = obfd->sections; s != NULL; s = s->next)
12873 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12874 == (SEC_ALLOC | SEC_SMALL_DATA))
12875 break;
12876 if (s == NULL)
12877 for (s = obfd->sections; s != NULL; s = s->next)
12878 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12879 == SEC_ALLOC)
12880 break;
12881 if (s == NULL)
12882 for (s = obfd->sections; s != NULL; s = s->next)
12883 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12884 break;
12885 }
12886
12887 TOCstart = 0;
12888 if (s != NULL)
12889 TOCstart = s->output_section->vma + s->output_offset;
12890
12891 /* Force alignment. */
12892 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12893 TOCstart -= adjust;
12894 _bfd_set_gp_value (obfd, TOCstart);
12895
12896 if (info != NULL && s != NULL)
12897 {
12898 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12899
12900 if (htab != NULL)
12901 {
12902 if (htab->elf.hgot != NULL)
12903 {
12904 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12905 htab->elf.hgot->root.u.def.section = s;
12906 }
12907 }
12908 else
12909 {
12910 struct bfd_link_hash_entry *bh = NULL;
12911 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12912 s, TOC_BASE_OFF - adjust,
12913 NULL, FALSE, FALSE, &bh);
12914 }
12915 }
12916 return TOCstart;
12917 }
12918
12919 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12920 write out any global entry stubs. */
12921
12922 static bfd_boolean
12923 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12924 {
12925 struct bfd_link_info *info;
12926 struct ppc_link_hash_table *htab;
12927 struct plt_entry *pent;
12928 asection *s;
12929
12930 if (h->root.type == bfd_link_hash_indirect)
12931 return TRUE;
12932
12933 if (!h->pointer_equality_needed)
12934 return TRUE;
12935
12936 if (h->def_regular)
12937 return TRUE;
12938
12939 info = inf;
12940 htab = ppc_hash_table (info);
12941 if (htab == NULL)
12942 return FALSE;
12943
12944 s = htab->glink;
12945 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12946 if (pent->plt.offset != (bfd_vma) -1
12947 && pent->addend == 0)
12948 {
12949 bfd_byte *p;
12950 asection *plt;
12951 bfd_vma off;
12952
12953 p = s->contents + h->root.u.def.value;
12954 plt = htab->elf.splt;
12955 if (!htab->elf.dynamic_sections_created
12956 || h->dynindx == -1)
12957 plt = htab->elf.iplt;
12958 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12959 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12960
12961 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12962 {
12963 info->callbacks->einfo
12964 (_("%P: linkage table error against `%T'\n"),
12965 h->root.root.string);
12966 bfd_set_error (bfd_error_bad_value);
12967 htab->stub_error = TRUE;
12968 }
12969
12970 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12971 if (htab->params->emit_stub_syms)
12972 {
12973 size_t len = strlen (h->root.root.string);
12974 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12975
12976 if (name == NULL)
12977 return FALSE;
12978
12979 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12980 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12981 if (h == NULL)
12982 return FALSE;
12983 if (h->root.type == bfd_link_hash_new)
12984 {
12985 h->root.type = bfd_link_hash_defined;
12986 h->root.u.def.section = s;
12987 h->root.u.def.value = p - s->contents;
12988 h->ref_regular = 1;
12989 h->def_regular = 1;
12990 h->ref_regular_nonweak = 1;
12991 h->forced_local = 1;
12992 h->non_elf = 0;
12993 h->root.linker_def = 1;
12994 }
12995 }
12996
12997 if (PPC_HA (off) != 0)
12998 {
12999 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13000 p += 4;
13001 }
13002 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13003 p += 4;
13004 bfd_put_32 (s->owner, MTCTR_R12, p);
13005 p += 4;
13006 bfd_put_32 (s->owner, BCTR, p);
13007 break;
13008 }
13009 return TRUE;
13010 }
13011
13012 /* Build all the stubs associated with the current output file.
13013 The stubs are kept in a hash table attached to the main linker
13014 hash table. This function is called via gldelf64ppc_finish. */
13015
13016 bfd_boolean
13017 ppc64_elf_build_stubs (struct bfd_link_info *info,
13018 char **stats)
13019 {
13020 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13021 struct map_stub *group;
13022 asection *stub_sec;
13023 bfd_byte *p;
13024 int stub_sec_count = 0;
13025
13026 if (htab == NULL)
13027 return FALSE;
13028
13029 /* Allocate memory to hold the linker stubs. */
13030 for (stub_sec = htab->params->stub_bfd->sections;
13031 stub_sec != NULL;
13032 stub_sec = stub_sec->next)
13033 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
13034 && stub_sec->size != 0)
13035 {
13036 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13037 if (stub_sec->contents == NULL)
13038 return FALSE;
13039 stub_sec->size = 0;
13040 }
13041
13042 if (htab->glink != NULL && htab->glink->size != 0)
13043 {
13044 unsigned int indx;
13045 bfd_vma plt0;
13046
13047 /* Build the .glink plt call stub. */
13048 if (htab->params->emit_stub_syms)
13049 {
13050 struct elf_link_hash_entry *h;
13051 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13052 TRUE, FALSE, FALSE);
13053 if (h == NULL)
13054 return FALSE;
13055 if (h->root.type == bfd_link_hash_new)
13056 {
13057 h->root.type = bfd_link_hash_defined;
13058 h->root.u.def.section = htab->glink;
13059 h->root.u.def.value = 8;
13060 h->ref_regular = 1;
13061 h->def_regular = 1;
13062 h->ref_regular_nonweak = 1;
13063 h->forced_local = 1;
13064 h->non_elf = 0;
13065 h->root.linker_def = 1;
13066 }
13067 }
13068 plt0 = (htab->elf.splt->output_section->vma
13069 + htab->elf.splt->output_offset
13070 - 16);
13071 if (info->emitrelocations)
13072 {
13073 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13074 if (r == NULL)
13075 return FALSE;
13076 r->r_offset = (htab->glink->output_offset
13077 + htab->glink->output_section->vma);
13078 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13079 r->r_addend = plt0;
13080 }
13081 p = htab->glink->contents;
13082 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13083 bfd_put_64 (htab->glink->owner, plt0, p);
13084 p += 8;
13085 if (htab->opd_abi)
13086 {
13087 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13088 p += 4;
13089 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13090 p += 4;
13091 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13092 p += 4;
13093 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13094 p += 4;
13095 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13096 p += 4;
13097 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13098 p += 4;
13099 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13100 p += 4;
13101 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13102 p += 4;
13103 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13104 p += 4;
13105 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13106 p += 4;
13107 }
13108 else
13109 {
13110 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13111 p += 4;
13112 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13113 p += 4;
13114 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13115 p += 4;
13116 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13117 p += 4;
13118 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13119 p += 4;
13120 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13121 p += 4;
13122 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13123 p += 4;
13124 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13125 p += 4;
13126 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13127 p += 4;
13128 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13129 p += 4;
13130 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13131 p += 4;
13132 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13133 p += 4;
13134 }
13135 bfd_put_32 (htab->glink->owner, BCTR, p);
13136 p += 4;
13137 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13138 {
13139 bfd_put_32 (htab->glink->owner, NOP, p);
13140 p += 4;
13141 }
13142
13143 /* Build the .glink lazy link call stubs. */
13144 indx = 0;
13145 while (p < htab->glink->contents + htab->glink->rawsize)
13146 {
13147 if (htab->opd_abi)
13148 {
13149 if (indx < 0x8000)
13150 {
13151 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13152 p += 4;
13153 }
13154 else
13155 {
13156 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13157 p += 4;
13158 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13159 p);
13160 p += 4;
13161 }
13162 }
13163 bfd_put_32 (htab->glink->owner,
13164 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13165 indx++;
13166 p += 4;
13167 }
13168
13169 /* Build .glink global entry stubs. */
13170 if (htab->glink->size > htab->glink->rawsize)
13171 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13172 }
13173
13174 if (htab->brlt != NULL && htab->brlt->size != 0)
13175 {
13176 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13177 htab->brlt->size);
13178 if (htab->brlt->contents == NULL)
13179 return FALSE;
13180 }
13181 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13182 {
13183 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13184 htab->relbrlt->size);
13185 if (htab->relbrlt->contents == NULL)
13186 return FALSE;
13187 }
13188
13189 /* Build the stubs as directed by the stub hash table. */
13190 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13191
13192 for (group = htab->group; group != NULL; group = group->next)
13193 if (group->needs_save_res)
13194 {
13195 stub_sec = group->stub_sec;
13196 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13197 htab->sfpr->size);
13198 if (htab->params->emit_stub_syms)
13199 {
13200 unsigned int i;
13201
13202 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13203 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13204 return FALSE;
13205 }
13206 stub_sec->size += htab->sfpr->size;
13207 }
13208
13209 if (htab->relbrlt != NULL)
13210 htab->relbrlt->reloc_count = 0;
13211
13212 if (htab->params->plt_stub_align != 0)
13213 for (stub_sec = htab->params->stub_bfd->sections;
13214 stub_sec != NULL;
13215 stub_sec = stub_sec->next)
13216 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13217 stub_sec->size = ((stub_sec->size
13218 + (1 << htab->params->plt_stub_align) - 1)
13219 & -(1 << htab->params->plt_stub_align));
13220
13221 for (stub_sec = htab->params->stub_bfd->sections;
13222 stub_sec != NULL;
13223 stub_sec = stub_sec->next)
13224 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13225 {
13226 stub_sec_count += 1;
13227 if (stub_sec->rawsize != stub_sec->size
13228 && (htab->stub_iteration <= STUB_SHRINK_ITER
13229 || stub_sec->rawsize < stub_sec->size))
13230 break;
13231 }
13232
13233 /* Note that the glink_eh_frame check here is not only testing that
13234 the generated size matched the calculated size but also that
13235 bfd_elf_discard_info didn't make any changes to the section. */
13236 if (stub_sec != NULL
13237 || (htab->glink_eh_frame != NULL
13238 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13239 {
13240 htab->stub_error = TRUE;
13241 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13242 }
13243
13244 if (htab->stub_error)
13245 return FALSE;
13246
13247 if (stats != NULL)
13248 {
13249 *stats = bfd_malloc (500);
13250 if (*stats == NULL)
13251 return FALSE;
13252
13253 sprintf (*stats, _("linker stubs in %u group%s\n"
13254 " branch %lu\n"
13255 " toc adjust %lu\n"
13256 " long branch %lu\n"
13257 " long toc adj %lu\n"
13258 " plt call %lu\n"
13259 " plt call toc %lu\n"
13260 " global entry %lu"),
13261 stub_sec_count,
13262 stub_sec_count == 1 ? "" : "s",
13263 htab->stub_count[ppc_stub_long_branch - 1],
13264 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13265 htab->stub_count[ppc_stub_plt_branch - 1],
13266 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13267 htab->stub_count[ppc_stub_plt_call - 1],
13268 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13269 htab->stub_count[ppc_stub_global_entry - 1]);
13270 }
13271 return TRUE;
13272 }
13273
13274 /* What to do when ld finds relocations against symbols defined in
13275 discarded sections. */
13276
13277 static unsigned int
13278 ppc64_elf_action_discarded (asection *sec)
13279 {
13280 if (strcmp (".opd", sec->name) == 0)
13281 return 0;
13282
13283 if (strcmp (".toc", sec->name) == 0)
13284 return 0;
13285
13286 if (strcmp (".toc1", sec->name) == 0)
13287 return 0;
13288
13289 return _bfd_elf_default_action_discarded (sec);
13290 }
13291
13292 /* The RELOCATE_SECTION function is called by the ELF backend linker
13293 to handle the relocations for a section.
13294
13295 The relocs are always passed as Rela structures; if the section
13296 actually uses Rel structures, the r_addend field will always be
13297 zero.
13298
13299 This function is responsible for adjust the section contents as
13300 necessary, and (if using Rela relocs and generating a
13301 relocatable output file) adjusting the reloc addend as
13302 necessary.
13303
13304 This function does not have to worry about setting the reloc
13305 address or the reloc symbol index.
13306
13307 LOCAL_SYMS is a pointer to the swapped in local symbols.
13308
13309 LOCAL_SECTIONS is an array giving the section in the input file
13310 corresponding to the st_shndx field of each local symbol.
13311
13312 The global hash table entry for the global symbols can be found
13313 via elf_sym_hashes (input_bfd).
13314
13315 When generating relocatable output, this function must handle
13316 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13317 going to be the section symbol corresponding to the output
13318 section, which means that the addend must be adjusted
13319 accordingly. */
13320
13321 static bfd_boolean
13322 ppc64_elf_relocate_section (bfd *output_bfd,
13323 struct bfd_link_info *info,
13324 bfd *input_bfd,
13325 asection *input_section,
13326 bfd_byte *contents,
13327 Elf_Internal_Rela *relocs,
13328 Elf_Internal_Sym *local_syms,
13329 asection **local_sections)
13330 {
13331 struct ppc_link_hash_table *htab;
13332 Elf_Internal_Shdr *symtab_hdr;
13333 struct elf_link_hash_entry **sym_hashes;
13334 Elf_Internal_Rela *rel;
13335 Elf_Internal_Rela *wrel;
13336 Elf_Internal_Rela *relend;
13337 Elf_Internal_Rela outrel;
13338 bfd_byte *loc;
13339 struct got_entry **local_got_ents;
13340 bfd_vma TOCstart;
13341 bfd_boolean ret = TRUE;
13342 bfd_boolean is_opd;
13343 /* Assume 'at' branch hints. */
13344 bfd_boolean is_isa_v2 = TRUE;
13345 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13346
13347 /* Initialize howto table if needed. */
13348 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13349 ppc_howto_init ();
13350
13351 htab = ppc_hash_table (info);
13352 if (htab == NULL)
13353 return FALSE;
13354
13355 /* Don't relocate stub sections. */
13356 if (input_section->owner == htab->params->stub_bfd)
13357 return TRUE;
13358
13359 BFD_ASSERT (is_ppc64_elf (input_bfd));
13360
13361 local_got_ents = elf_local_got_ents (input_bfd);
13362 TOCstart = elf_gp (output_bfd);
13363 symtab_hdr = &elf_symtab_hdr (input_bfd);
13364 sym_hashes = elf_sym_hashes (input_bfd);
13365 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13366
13367 rel = wrel = relocs;
13368 relend = relocs + input_section->reloc_count;
13369 for (; rel < relend; wrel++, rel++)
13370 {
13371 enum elf_ppc64_reloc_type r_type;
13372 bfd_vma addend;
13373 bfd_reloc_status_type r;
13374 Elf_Internal_Sym *sym;
13375 asection *sec;
13376 struct elf_link_hash_entry *h_elf;
13377 struct ppc_link_hash_entry *h;
13378 struct ppc_link_hash_entry *fdh;
13379 const char *sym_name;
13380 unsigned long r_symndx, toc_symndx;
13381 bfd_vma toc_addend;
13382 unsigned char tls_mask, tls_gd, tls_type;
13383 unsigned char sym_type;
13384 bfd_vma relocation;
13385 bfd_boolean unresolved_reloc;
13386 bfd_boolean warned;
13387 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13388 unsigned int insn;
13389 unsigned int mask;
13390 struct ppc_stub_hash_entry *stub_entry;
13391 bfd_vma max_br_offset;
13392 bfd_vma from;
13393 Elf_Internal_Rela orig_rel;
13394 reloc_howto_type *howto;
13395 struct reloc_howto_struct alt_howto;
13396
13397 again:
13398 orig_rel = *rel;
13399
13400 r_type = ELF64_R_TYPE (rel->r_info);
13401 r_symndx = ELF64_R_SYM (rel->r_info);
13402
13403 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13404 symbol of the previous ADDR64 reloc. The symbol gives us the
13405 proper TOC base to use. */
13406 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13407 && wrel != relocs
13408 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13409 && is_opd)
13410 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13411
13412 sym = NULL;
13413 sec = NULL;
13414 h_elf = NULL;
13415 sym_name = NULL;
13416 unresolved_reloc = FALSE;
13417 warned = FALSE;
13418
13419 if (r_symndx < symtab_hdr->sh_info)
13420 {
13421 /* It's a local symbol. */
13422 struct _opd_sec_data *opd;
13423
13424 sym = local_syms + r_symndx;
13425 sec = local_sections[r_symndx];
13426 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13427 sym_type = ELF64_ST_TYPE (sym->st_info);
13428 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13429 opd = get_opd_info (sec);
13430 if (opd != NULL && opd->adjust != NULL)
13431 {
13432 long adjust = opd->adjust[OPD_NDX (sym->st_value
13433 + rel->r_addend)];
13434 if (adjust == -1)
13435 relocation = 0;
13436 else
13437 {
13438 /* If this is a relocation against the opd section sym
13439 and we have edited .opd, adjust the reloc addend so
13440 that ld -r and ld --emit-relocs output is correct.
13441 If it is a reloc against some other .opd symbol,
13442 then the symbol value will be adjusted later. */
13443 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13444 rel->r_addend += adjust;
13445 else
13446 relocation += adjust;
13447 }
13448 }
13449 }
13450 else
13451 {
13452 bfd_boolean ignored;
13453
13454 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13455 r_symndx, symtab_hdr, sym_hashes,
13456 h_elf, sec, relocation,
13457 unresolved_reloc, warned, ignored);
13458 sym_name = h_elf->root.root.string;
13459 sym_type = h_elf->type;
13460 if (sec != NULL
13461 && sec->owner == output_bfd
13462 && strcmp (sec->name, ".opd") == 0)
13463 {
13464 /* This is a symbol defined in a linker script. All
13465 such are defined in output sections, even those
13466 defined by simple assignment from a symbol defined in
13467 an input section. Transfer the symbol to an
13468 appropriate input .opd section, so that a branch to
13469 this symbol will be mapped to the location specified
13470 by the opd entry. */
13471 struct bfd_link_order *lo;
13472 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13473 if (lo->type == bfd_indirect_link_order)
13474 {
13475 asection *isec = lo->u.indirect.section;
13476 if (h_elf->root.u.def.value >= isec->output_offset
13477 && h_elf->root.u.def.value < (isec->output_offset
13478 + isec->size))
13479 {
13480 h_elf->root.u.def.value -= isec->output_offset;
13481 h_elf->root.u.def.section = isec;
13482 sec = isec;
13483 break;
13484 }
13485 }
13486 }
13487 }
13488 h = (struct ppc_link_hash_entry *) h_elf;
13489
13490 if (sec != NULL && discarded_section (sec))
13491 {
13492 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13493 input_bfd, input_section,
13494 contents + rel->r_offset);
13495 wrel->r_offset = rel->r_offset;
13496 wrel->r_info = 0;
13497 wrel->r_addend = 0;
13498
13499 /* For ld -r, remove relocations in debug sections against
13500 sections defined in discarded sections. Not done for
13501 non-debug to preserve relocs in .eh_frame which the
13502 eh_frame editing code expects to be present. */
13503 if (bfd_link_relocatable (info)
13504 && (input_section->flags & SEC_DEBUGGING))
13505 wrel--;
13506
13507 continue;
13508 }
13509
13510 if (bfd_link_relocatable (info))
13511 goto copy_reloc;
13512
13513 if (h != NULL && &h->elf == htab->elf.hgot)
13514 {
13515 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13516 sec = bfd_abs_section_ptr;
13517 unresolved_reloc = FALSE;
13518 }
13519
13520 /* TLS optimizations. Replace instruction sequences and relocs
13521 based on information we collected in tls_optimize. We edit
13522 RELOCS so that --emit-relocs will output something sensible
13523 for the final instruction stream. */
13524 tls_mask = 0;
13525 tls_gd = 0;
13526 toc_symndx = 0;
13527 if (h != NULL)
13528 tls_mask = h->tls_mask;
13529 else if (local_got_ents != NULL)
13530 {
13531 struct plt_entry **local_plt = (struct plt_entry **)
13532 (local_got_ents + symtab_hdr->sh_info);
13533 unsigned char *lgot_masks = (unsigned char *)
13534 (local_plt + symtab_hdr->sh_info);
13535 tls_mask = lgot_masks[r_symndx];
13536 }
13537 if (tls_mask == 0
13538 && (r_type == R_PPC64_TLS
13539 || r_type == R_PPC64_TLSGD
13540 || r_type == R_PPC64_TLSLD))
13541 {
13542 /* Check for toc tls entries. */
13543 unsigned char *toc_tls;
13544
13545 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13546 &local_syms, rel, input_bfd))
13547 return FALSE;
13548
13549 if (toc_tls)
13550 tls_mask = *toc_tls;
13551 }
13552
13553 /* Check that tls relocs are used with tls syms, and non-tls
13554 relocs are used with non-tls syms. */
13555 if (r_symndx != STN_UNDEF
13556 && r_type != R_PPC64_NONE
13557 && (h == NULL
13558 || h->elf.root.type == bfd_link_hash_defined
13559 || h->elf.root.type == bfd_link_hash_defweak)
13560 && (IS_PPC64_TLS_RELOC (r_type)
13561 != (sym_type == STT_TLS
13562 || (sym_type == STT_SECTION
13563 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13564 {
13565 if (tls_mask != 0
13566 && (r_type == R_PPC64_TLS
13567 || r_type == R_PPC64_TLSGD
13568 || r_type == R_PPC64_TLSLD))
13569 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13570 ;
13571 else
13572 info->callbacks->einfo
13573 (!IS_PPC64_TLS_RELOC (r_type)
13574 /* xgettext:c-format */
13575 ? _("%H: %s used with TLS symbol `%T'\n")
13576 /* xgettext:c-format */
13577 : _("%H: %s used with non-TLS symbol `%T'\n"),
13578 input_bfd, input_section, rel->r_offset,
13579 ppc64_elf_howto_table[r_type]->name,
13580 sym_name);
13581 }
13582
13583 /* Ensure reloc mapping code below stays sane. */
13584 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13585 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13586 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13587 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13588 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13589 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13590 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13591 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13592 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13593 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13594 abort ();
13595
13596 switch (r_type)
13597 {
13598 default:
13599 break;
13600
13601 case R_PPC64_LO_DS_OPT:
13602 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13603 if ((insn & (0x3f << 26)) != 58u << 26)
13604 abort ();
13605 insn += (14u << 26) - (58u << 26);
13606 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13607 r_type = R_PPC64_TOC16_LO;
13608 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13609 break;
13610
13611 case R_PPC64_TOC16:
13612 case R_PPC64_TOC16_LO:
13613 case R_PPC64_TOC16_DS:
13614 case R_PPC64_TOC16_LO_DS:
13615 {
13616 /* Check for toc tls entries. */
13617 unsigned char *toc_tls;
13618 int retval;
13619
13620 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13621 &local_syms, rel, input_bfd);
13622 if (retval == 0)
13623 return FALSE;
13624
13625 if (toc_tls)
13626 {
13627 tls_mask = *toc_tls;
13628 if (r_type == R_PPC64_TOC16_DS
13629 || r_type == R_PPC64_TOC16_LO_DS)
13630 {
13631 if (tls_mask != 0
13632 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13633 goto toctprel;
13634 }
13635 else
13636 {
13637 /* If we found a GD reloc pair, then we might be
13638 doing a GD->IE transition. */
13639 if (retval == 2)
13640 {
13641 tls_gd = TLS_TPRELGD;
13642 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13643 goto tls_ldgd_opt;
13644 }
13645 else if (retval == 3)
13646 {
13647 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13648 goto tls_ldgd_opt;
13649 }
13650 }
13651 }
13652 }
13653 break;
13654
13655 case R_PPC64_GOT_TPREL16_HI:
13656 case R_PPC64_GOT_TPREL16_HA:
13657 if (tls_mask != 0
13658 && (tls_mask & TLS_TPREL) == 0)
13659 {
13660 rel->r_offset -= d_offset;
13661 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13662 r_type = R_PPC64_NONE;
13663 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13664 }
13665 break;
13666
13667 case R_PPC64_GOT_TPREL16_DS:
13668 case R_PPC64_GOT_TPREL16_LO_DS:
13669 if (tls_mask != 0
13670 && (tls_mask & TLS_TPREL) == 0)
13671 {
13672 toctprel:
13673 insn = bfd_get_32 (input_bfd,
13674 contents + rel->r_offset - d_offset);
13675 insn &= 31 << 21;
13676 insn |= 0x3c0d0000; /* addis 0,13,0 */
13677 bfd_put_32 (input_bfd, insn,
13678 contents + rel->r_offset - d_offset);
13679 r_type = R_PPC64_TPREL16_HA;
13680 if (toc_symndx != 0)
13681 {
13682 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13683 rel->r_addend = toc_addend;
13684 /* We changed the symbol. Start over in order to
13685 get h, sym, sec etc. right. */
13686 goto again;
13687 }
13688 else
13689 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13690 }
13691 break;
13692
13693 case R_PPC64_TLS:
13694 if (tls_mask != 0
13695 && (tls_mask & TLS_TPREL) == 0)
13696 {
13697 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13698 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13699 if (insn == 0)
13700 abort ();
13701 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13702 /* Was PPC64_TLS which sits on insn boundary, now
13703 PPC64_TPREL16_LO which is at low-order half-word. */
13704 rel->r_offset += d_offset;
13705 r_type = R_PPC64_TPREL16_LO;
13706 if (toc_symndx != 0)
13707 {
13708 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13709 rel->r_addend = toc_addend;
13710 /* We changed the symbol. Start over in order to
13711 get h, sym, sec etc. right. */
13712 goto again;
13713 }
13714 else
13715 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13716 }
13717 break;
13718
13719 case R_PPC64_GOT_TLSGD16_HI:
13720 case R_PPC64_GOT_TLSGD16_HA:
13721 tls_gd = TLS_TPRELGD;
13722 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13723 goto tls_gdld_hi;
13724 break;
13725
13726 case R_PPC64_GOT_TLSLD16_HI:
13727 case R_PPC64_GOT_TLSLD16_HA:
13728 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13729 {
13730 tls_gdld_hi:
13731 if ((tls_mask & tls_gd) != 0)
13732 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13733 + R_PPC64_GOT_TPREL16_DS);
13734 else
13735 {
13736 rel->r_offset -= d_offset;
13737 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13738 r_type = R_PPC64_NONE;
13739 }
13740 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13741 }
13742 break;
13743
13744 case R_PPC64_GOT_TLSGD16:
13745 case R_PPC64_GOT_TLSGD16_LO:
13746 tls_gd = TLS_TPRELGD;
13747 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13748 goto tls_ldgd_opt;
13749 break;
13750
13751 case R_PPC64_GOT_TLSLD16:
13752 case R_PPC64_GOT_TLSLD16_LO:
13753 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13754 {
13755 unsigned int insn1, insn2, insn3;
13756 bfd_vma offset;
13757
13758 tls_ldgd_opt:
13759 offset = (bfd_vma) -1;
13760 /* If not using the newer R_PPC64_TLSGD/LD to mark
13761 __tls_get_addr calls, we must trust that the call
13762 stays with its arg setup insns, ie. that the next
13763 reloc is the __tls_get_addr call associated with
13764 the current reloc. Edit both insns. */
13765 if (input_section->has_tls_get_addr_call
13766 && rel + 1 < relend
13767 && branch_reloc_hash_match (input_bfd, rel + 1,
13768 htab->tls_get_addr,
13769 htab->tls_get_addr_fd))
13770 offset = rel[1].r_offset;
13771 /* We read the low GOT_TLS (or TOC16) insn because we
13772 need to keep the destination reg. It may be
13773 something other than the usual r3, and moved to r3
13774 before the call by intervening code. */
13775 insn1 = bfd_get_32 (input_bfd,
13776 contents + rel->r_offset - d_offset);
13777 if ((tls_mask & tls_gd) != 0)
13778 {
13779 /* IE */
13780 insn1 &= (0x1f << 21) | (0x1f << 16);
13781 insn1 |= 58 << 26; /* ld */
13782 insn2 = 0x7c636a14; /* add 3,3,13 */
13783 if (offset != (bfd_vma) -1)
13784 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13785 if ((tls_mask & TLS_EXPLICIT) == 0)
13786 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13787 + R_PPC64_GOT_TPREL16_DS);
13788 else
13789 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13790 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13791 }
13792 else
13793 {
13794 /* LE */
13795 insn1 &= 0x1f << 21;
13796 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13797 insn2 = 0x38630000; /* addi 3,3,0 */
13798 if (tls_gd == 0)
13799 {
13800 /* Was an LD reloc. */
13801 if (toc_symndx)
13802 sec = local_sections[toc_symndx];
13803 for (r_symndx = 0;
13804 r_symndx < symtab_hdr->sh_info;
13805 r_symndx++)
13806 if (local_sections[r_symndx] == sec)
13807 break;
13808 if (r_symndx >= symtab_hdr->sh_info)
13809 r_symndx = STN_UNDEF;
13810 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13811 if (r_symndx != STN_UNDEF)
13812 rel->r_addend -= (local_syms[r_symndx].st_value
13813 + sec->output_offset
13814 + sec->output_section->vma);
13815 }
13816 else if (toc_symndx != 0)
13817 {
13818 r_symndx = toc_symndx;
13819 rel->r_addend = toc_addend;
13820 }
13821 r_type = R_PPC64_TPREL16_HA;
13822 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13823 if (offset != (bfd_vma) -1)
13824 {
13825 rel[1].r_info = ELF64_R_INFO (r_symndx,
13826 R_PPC64_TPREL16_LO);
13827 rel[1].r_offset = offset + d_offset;
13828 rel[1].r_addend = rel->r_addend;
13829 }
13830 }
13831 bfd_put_32 (input_bfd, insn1,
13832 contents + rel->r_offset - d_offset);
13833 if (offset != (bfd_vma) -1)
13834 {
13835 insn3 = bfd_get_32 (input_bfd,
13836 contents + offset + 4);
13837 if (insn3 == NOP
13838 || insn3 == CROR_151515 || insn3 == CROR_313131)
13839 {
13840 rel[1].r_offset += 4;
13841 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13842 insn2 = NOP;
13843 }
13844 bfd_put_32 (input_bfd, insn2, contents + offset);
13845 }
13846 if ((tls_mask & tls_gd) == 0
13847 && (tls_gd == 0 || toc_symndx != 0))
13848 {
13849 /* We changed the symbol. Start over in order
13850 to get h, sym, sec etc. right. */
13851 goto again;
13852 }
13853 }
13854 break;
13855
13856 case R_PPC64_TLSGD:
13857 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13858 {
13859 unsigned int insn2, insn3;
13860 bfd_vma offset = rel->r_offset;
13861
13862 if ((tls_mask & TLS_TPRELGD) != 0)
13863 {
13864 /* IE */
13865 r_type = R_PPC64_NONE;
13866 insn2 = 0x7c636a14; /* add 3,3,13 */
13867 }
13868 else
13869 {
13870 /* LE */
13871 if (toc_symndx != 0)
13872 {
13873 r_symndx = toc_symndx;
13874 rel->r_addend = toc_addend;
13875 }
13876 r_type = R_PPC64_TPREL16_LO;
13877 rel->r_offset = offset + d_offset;
13878 insn2 = 0x38630000; /* addi 3,3,0 */
13879 }
13880 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13881 /* Zap the reloc on the _tls_get_addr call too. */
13882 BFD_ASSERT (offset == rel[1].r_offset);
13883 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13884 insn3 = bfd_get_32 (input_bfd,
13885 contents + offset + 4);
13886 if (insn3 == NOP
13887 || insn3 == CROR_151515 || insn3 == CROR_313131)
13888 {
13889 rel->r_offset += 4;
13890 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13891 insn2 = NOP;
13892 }
13893 bfd_put_32 (input_bfd, insn2, contents + offset);
13894 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13895 goto again;
13896 }
13897 break;
13898
13899 case R_PPC64_TLSLD:
13900 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13901 {
13902 unsigned int insn2, insn3;
13903 bfd_vma offset = rel->r_offset;
13904
13905 if (toc_symndx)
13906 sec = local_sections[toc_symndx];
13907 for (r_symndx = 0;
13908 r_symndx < symtab_hdr->sh_info;
13909 r_symndx++)
13910 if (local_sections[r_symndx] == sec)
13911 break;
13912 if (r_symndx >= symtab_hdr->sh_info)
13913 r_symndx = STN_UNDEF;
13914 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13915 if (r_symndx != STN_UNDEF)
13916 rel->r_addend -= (local_syms[r_symndx].st_value
13917 + sec->output_offset
13918 + sec->output_section->vma);
13919
13920 r_type = R_PPC64_TPREL16_LO;
13921 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13922 rel->r_offset = offset + d_offset;
13923 /* Zap the reloc on the _tls_get_addr call too. */
13924 BFD_ASSERT (offset == rel[1].r_offset);
13925 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13926 insn2 = 0x38630000; /* addi 3,3,0 */
13927 insn3 = bfd_get_32 (input_bfd,
13928 contents + offset + 4);
13929 if (insn3 == NOP
13930 || insn3 == CROR_151515 || insn3 == CROR_313131)
13931 {
13932 rel->r_offset += 4;
13933 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13934 insn2 = NOP;
13935 }
13936 bfd_put_32 (input_bfd, insn2, contents + offset);
13937 goto again;
13938 }
13939 break;
13940
13941 case R_PPC64_DTPMOD64:
13942 if (rel + 1 < relend
13943 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13944 && rel[1].r_offset == rel->r_offset + 8)
13945 {
13946 if ((tls_mask & TLS_GD) == 0)
13947 {
13948 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13949 if ((tls_mask & TLS_TPRELGD) != 0)
13950 r_type = R_PPC64_TPREL64;
13951 else
13952 {
13953 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13954 r_type = R_PPC64_NONE;
13955 }
13956 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13957 }
13958 }
13959 else
13960 {
13961 if ((tls_mask & TLS_LD) == 0)
13962 {
13963 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13964 r_type = R_PPC64_NONE;
13965 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13966 }
13967 }
13968 break;
13969
13970 case R_PPC64_TPREL64:
13971 if ((tls_mask & TLS_TPREL) == 0)
13972 {
13973 r_type = R_PPC64_NONE;
13974 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13975 }
13976 break;
13977
13978 case R_PPC64_ENTRY:
13979 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13980 if (!bfd_link_pic (info)
13981 && !info->traditional_format
13982 && relocation + 0x80008000 <= 0xffffffff)
13983 {
13984 unsigned int insn1, insn2;
13985
13986 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13987 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13988 if ((insn1 & ~0xfffc) == LD_R2_0R12
13989 && insn2 == ADD_R2_R2_R12)
13990 {
13991 bfd_put_32 (input_bfd,
13992 LIS_R2 + PPC_HA (relocation),
13993 contents + rel->r_offset);
13994 bfd_put_32 (input_bfd,
13995 ADDI_R2_R2 + PPC_LO (relocation),
13996 contents + rel->r_offset + 4);
13997 }
13998 }
13999 else
14000 {
14001 relocation -= (rel->r_offset
14002 + input_section->output_offset
14003 + input_section->output_section->vma);
14004 if (relocation + 0x80008000 <= 0xffffffff)
14005 {
14006 unsigned int insn1, insn2;
14007
14008 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14009 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14010 if ((insn1 & ~0xfffc) == LD_R2_0R12
14011 && insn2 == ADD_R2_R2_R12)
14012 {
14013 bfd_put_32 (input_bfd,
14014 ADDIS_R2_R12 + PPC_HA (relocation),
14015 contents + rel->r_offset);
14016 bfd_put_32 (input_bfd,
14017 ADDI_R2_R2 + PPC_LO (relocation),
14018 contents + rel->r_offset + 4);
14019 }
14020 }
14021 }
14022 break;
14023
14024 case R_PPC64_REL16_HA:
14025 /* If we are generating a non-PIC executable, edit
14026 . 0: addis 2,12,.TOC.-0b@ha
14027 . addi 2,2,.TOC.-0b@l
14028 used by ELFv2 global entry points to set up r2, to
14029 . lis 2,.TOC.@ha
14030 . addi 2,2,.TOC.@l
14031 if .TOC. is in range. */
14032 if (!bfd_link_pic (info)
14033 && !info->traditional_format
14034 && !htab->opd_abi
14035 && rel->r_addend == d_offset
14036 && h != NULL && &h->elf == htab->elf.hgot
14037 && rel + 1 < relend
14038 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14039 && rel[1].r_offset == rel->r_offset + 4
14040 && rel[1].r_addend == rel->r_addend + 4
14041 && relocation + 0x80008000 <= 0xffffffff)
14042 {
14043 unsigned int insn1, insn2;
14044 bfd_vma offset = rel->r_offset - d_offset;
14045 insn1 = bfd_get_32 (input_bfd, contents + offset);
14046 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14047 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14048 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14049 {
14050 r_type = R_PPC64_ADDR16_HA;
14051 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14052 rel->r_addend -= d_offset;
14053 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14054 rel[1].r_addend -= d_offset + 4;
14055 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14056 }
14057 }
14058 break;
14059 }
14060
14061 /* Handle other relocations that tweak non-addend part of insn. */
14062 insn = 0;
14063 max_br_offset = 1 << 25;
14064 addend = rel->r_addend;
14065 reloc_dest = DEST_NORMAL;
14066 switch (r_type)
14067 {
14068 default:
14069 break;
14070
14071 case R_PPC64_TOCSAVE:
14072 if (relocation + addend == (rel->r_offset
14073 + input_section->output_offset
14074 + input_section->output_section->vma)
14075 && tocsave_find (htab, NO_INSERT,
14076 &local_syms, rel, input_bfd))
14077 {
14078 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14079 if (insn == NOP
14080 || insn == CROR_151515 || insn == CROR_313131)
14081 bfd_put_32 (input_bfd,
14082 STD_R2_0R1 + STK_TOC (htab),
14083 contents + rel->r_offset);
14084 }
14085 break;
14086
14087 /* Branch taken prediction relocations. */
14088 case R_PPC64_ADDR14_BRTAKEN:
14089 case R_PPC64_REL14_BRTAKEN:
14090 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14091 /* Fall through. */
14092
14093 /* Branch not taken prediction relocations. */
14094 case R_PPC64_ADDR14_BRNTAKEN:
14095 case R_PPC64_REL14_BRNTAKEN:
14096 insn |= bfd_get_32 (input_bfd,
14097 contents + rel->r_offset) & ~(0x01 << 21);
14098 /* Fall through. */
14099
14100 case R_PPC64_REL14:
14101 max_br_offset = 1 << 15;
14102 /* Fall through. */
14103
14104 case R_PPC64_REL24:
14105 /* Calls to functions with a different TOC, such as calls to
14106 shared objects, need to alter the TOC pointer. This is
14107 done using a linkage stub. A REL24 branching to these
14108 linkage stubs needs to be followed by a nop, as the nop
14109 will be replaced with an instruction to restore the TOC
14110 base pointer. */
14111 fdh = h;
14112 if (h != NULL
14113 && h->oh != NULL
14114 && h->oh->is_func_descriptor)
14115 fdh = ppc_follow_link (h->oh);
14116 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14117 htab);
14118 if (stub_entry != NULL
14119 && (stub_entry->stub_type == ppc_stub_plt_call
14120 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14121 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14122 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14123 {
14124 bfd_boolean can_plt_call = FALSE;
14125
14126 /* All of these stubs will modify r2, so there must be a
14127 branch and link followed by a nop. The nop is
14128 replaced by an insn to restore r2. */
14129 if (rel->r_offset + 8 <= input_section->size)
14130 {
14131 unsigned long br;
14132
14133 br = bfd_get_32 (input_bfd,
14134 contents + rel->r_offset);
14135 if ((br & 1) != 0)
14136 {
14137 unsigned long nop;
14138
14139 nop = bfd_get_32 (input_bfd,
14140 contents + rel->r_offset + 4);
14141 if (nop == NOP
14142 || nop == CROR_151515 || nop == CROR_313131)
14143 {
14144 if (h != NULL
14145 && (h == htab->tls_get_addr_fd
14146 || h == htab->tls_get_addr)
14147 && htab->params->tls_get_addr_opt)
14148 {
14149 /* Special stub used, leave nop alone. */
14150 }
14151 else
14152 bfd_put_32 (input_bfd,
14153 LD_R2_0R1 + STK_TOC (htab),
14154 contents + rel->r_offset + 4);
14155 can_plt_call = TRUE;
14156 }
14157 }
14158 }
14159
14160 if (!can_plt_call && h != NULL)
14161 {
14162 const char *name = h->elf.root.root.string;
14163
14164 if (*name == '.')
14165 ++name;
14166
14167 if (strncmp (name, "__libc_start_main", 17) == 0
14168 && (name[17] == 0 || name[17] == '@'))
14169 {
14170 /* Allow crt1 branch to go via a toc adjusting
14171 stub. Other calls that never return could do
14172 the same, if we could detect such. */
14173 can_plt_call = TRUE;
14174 }
14175 }
14176
14177 if (!can_plt_call)
14178 {
14179 /* g++ as of 20130507 emits self-calls without a
14180 following nop. This is arguably wrong since we
14181 have conflicting information. On the one hand a
14182 global symbol and on the other a local call
14183 sequence, but don't error for this special case.
14184 It isn't possible to cheaply verify we have
14185 exactly such a call. Allow all calls to the same
14186 section. */
14187 asection *code_sec = sec;
14188
14189 if (get_opd_info (sec) != NULL)
14190 {
14191 bfd_vma off = (relocation + addend
14192 - sec->output_section->vma
14193 - sec->output_offset);
14194
14195 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14196 }
14197 if (code_sec == input_section)
14198 can_plt_call = TRUE;
14199 }
14200
14201 if (!can_plt_call)
14202 {
14203 if (stub_entry->stub_type == ppc_stub_plt_call
14204 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14205 info->callbacks->einfo
14206 /* xgettext:c-format */
14207 (_("%H: call to `%T' lacks nop, can't restore toc; "
14208 "recompile with -fPIC\n"),
14209 input_bfd, input_section, rel->r_offset, sym_name);
14210 else
14211 info->callbacks->einfo
14212 /* xgettext:c-format */
14213 (_("%H: call to `%T' lacks nop, can't restore toc; "
14214 "(-mcmodel=small toc adjust stub)\n"),
14215 input_bfd, input_section, rel->r_offset, sym_name);
14216
14217 bfd_set_error (bfd_error_bad_value);
14218 ret = FALSE;
14219 }
14220
14221 if (can_plt_call
14222 && (stub_entry->stub_type == ppc_stub_plt_call
14223 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14224 unresolved_reloc = FALSE;
14225 }
14226
14227 if ((stub_entry == NULL
14228 || stub_entry->stub_type == ppc_stub_long_branch
14229 || stub_entry->stub_type == ppc_stub_plt_branch)
14230 && get_opd_info (sec) != NULL)
14231 {
14232 /* The branch destination is the value of the opd entry. */
14233 bfd_vma off = (relocation + addend
14234 - sec->output_section->vma
14235 - sec->output_offset);
14236 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14237 if (dest != (bfd_vma) -1)
14238 {
14239 relocation = dest;
14240 addend = 0;
14241 reloc_dest = DEST_OPD;
14242 }
14243 }
14244
14245 /* If the branch is out of reach we ought to have a long
14246 branch stub. */
14247 from = (rel->r_offset
14248 + input_section->output_offset
14249 + input_section->output_section->vma);
14250
14251 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14252 ? fdh->elf.other
14253 : sym->st_other);
14254
14255 if (stub_entry != NULL
14256 && (stub_entry->stub_type == ppc_stub_long_branch
14257 || stub_entry->stub_type == ppc_stub_plt_branch)
14258 && (r_type == R_PPC64_ADDR14_BRTAKEN
14259 || r_type == R_PPC64_ADDR14_BRNTAKEN
14260 || (relocation + addend - from + max_br_offset
14261 < 2 * max_br_offset)))
14262 /* Don't use the stub if this branch is in range. */
14263 stub_entry = NULL;
14264
14265 if (stub_entry != NULL)
14266 {
14267 /* Munge up the value and addend so that we call the stub
14268 rather than the procedure directly. */
14269 asection *stub_sec = stub_entry->group->stub_sec;
14270
14271 if (stub_entry->stub_type == ppc_stub_save_res)
14272 relocation += (stub_sec->output_offset
14273 + stub_sec->output_section->vma
14274 + stub_sec->size - htab->sfpr->size
14275 - htab->sfpr->output_offset
14276 - htab->sfpr->output_section->vma);
14277 else
14278 relocation = (stub_entry->stub_offset
14279 + stub_sec->output_offset
14280 + stub_sec->output_section->vma);
14281 addend = 0;
14282 reloc_dest = DEST_STUB;
14283
14284 if ((stub_entry->stub_type == ppc_stub_plt_call
14285 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14286 && (ALWAYS_EMIT_R2SAVE
14287 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14288 && rel + 1 < relend
14289 && rel[1].r_offset == rel->r_offset + 4
14290 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14291 relocation += 4;
14292 }
14293
14294 if (insn != 0)
14295 {
14296 if (is_isa_v2)
14297 {
14298 /* Set 'a' bit. This is 0b00010 in BO field for branch
14299 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14300 for branch on CTR insns (BO == 1a00t or 1a01t). */
14301 if ((insn & (0x14 << 21)) == (0x04 << 21))
14302 insn |= 0x02 << 21;
14303 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14304 insn |= 0x08 << 21;
14305 else
14306 break;
14307 }
14308 else
14309 {
14310 /* Invert 'y' bit if not the default. */
14311 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14312 insn ^= 0x01 << 21;
14313 }
14314
14315 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14316 }
14317
14318 /* NOP out calls to undefined weak functions.
14319 We can thus call a weak function without first
14320 checking whether the function is defined. */
14321 else if (h != NULL
14322 && h->elf.root.type == bfd_link_hash_undefweak
14323 && h->elf.dynindx == -1
14324 && r_type == R_PPC64_REL24
14325 && relocation == 0
14326 && addend == 0)
14327 {
14328 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14329 goto copy_reloc;
14330 }
14331 break;
14332 }
14333
14334 /* Set `addend'. */
14335 tls_type = 0;
14336 switch (r_type)
14337 {
14338 default:
14339 info->callbacks->einfo
14340 /* xgettext:c-format */
14341 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14342 input_bfd, (int) r_type, sym_name);
14343
14344 bfd_set_error (bfd_error_bad_value);
14345 ret = FALSE;
14346 goto copy_reloc;
14347
14348 case R_PPC64_NONE:
14349 case R_PPC64_TLS:
14350 case R_PPC64_TLSGD:
14351 case R_PPC64_TLSLD:
14352 case R_PPC64_TOCSAVE:
14353 case R_PPC64_GNU_VTINHERIT:
14354 case R_PPC64_GNU_VTENTRY:
14355 case R_PPC64_ENTRY:
14356 goto copy_reloc;
14357
14358 /* GOT16 relocations. Like an ADDR16 using the symbol's
14359 address in the GOT as relocation value instead of the
14360 symbol's value itself. Also, create a GOT entry for the
14361 symbol and put the symbol value there. */
14362 case R_PPC64_GOT_TLSGD16:
14363 case R_PPC64_GOT_TLSGD16_LO:
14364 case R_PPC64_GOT_TLSGD16_HI:
14365 case R_PPC64_GOT_TLSGD16_HA:
14366 tls_type = TLS_TLS | TLS_GD;
14367 goto dogot;
14368
14369 case R_PPC64_GOT_TLSLD16:
14370 case R_PPC64_GOT_TLSLD16_LO:
14371 case R_PPC64_GOT_TLSLD16_HI:
14372 case R_PPC64_GOT_TLSLD16_HA:
14373 tls_type = TLS_TLS | TLS_LD;
14374 goto dogot;
14375
14376 case R_PPC64_GOT_TPREL16_DS:
14377 case R_PPC64_GOT_TPREL16_LO_DS:
14378 case R_PPC64_GOT_TPREL16_HI:
14379 case R_PPC64_GOT_TPREL16_HA:
14380 tls_type = TLS_TLS | TLS_TPREL;
14381 goto dogot;
14382
14383 case R_PPC64_GOT_DTPREL16_DS:
14384 case R_PPC64_GOT_DTPREL16_LO_DS:
14385 case R_PPC64_GOT_DTPREL16_HI:
14386 case R_PPC64_GOT_DTPREL16_HA:
14387 tls_type = TLS_TLS | TLS_DTPREL;
14388 goto dogot;
14389
14390 case R_PPC64_GOT16:
14391 case R_PPC64_GOT16_LO:
14392 case R_PPC64_GOT16_HI:
14393 case R_PPC64_GOT16_HA:
14394 case R_PPC64_GOT16_DS:
14395 case R_PPC64_GOT16_LO_DS:
14396 dogot:
14397 {
14398 /* Relocation is to the entry for this symbol in the global
14399 offset table. */
14400 asection *got;
14401 bfd_vma *offp;
14402 bfd_vma off;
14403 unsigned long indx = 0;
14404 struct got_entry *ent;
14405
14406 if (tls_type == (TLS_TLS | TLS_LD)
14407 && (h == NULL
14408 || !h->elf.def_dynamic))
14409 ent = ppc64_tlsld_got (input_bfd);
14410 else
14411 {
14412 if (h != NULL)
14413 {
14414 if (!htab->elf.dynamic_sections_created
14415 || h->elf.dynindx == -1
14416 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14417 || (ELF_ST_VISIBILITY (h->elf.other) != STV_DEFAULT
14418 && h->elf.root.type == bfd_link_hash_undefweak))
14419 /* This is actually a static link, or it is a
14420 -Bsymbolic link and the symbol is defined
14421 locally, or the symbol was forced to be local
14422 because of a version file. */
14423 ;
14424 else
14425 {
14426 indx = h->elf.dynindx;
14427 unresolved_reloc = FALSE;
14428 }
14429 ent = h->elf.got.glist;
14430 }
14431 else
14432 {
14433 if (local_got_ents == NULL)
14434 abort ();
14435 ent = local_got_ents[r_symndx];
14436 }
14437
14438 for (; ent != NULL; ent = ent->next)
14439 if (ent->addend == orig_rel.r_addend
14440 && ent->owner == input_bfd
14441 && ent->tls_type == tls_type)
14442 break;
14443 }
14444
14445 if (ent == NULL)
14446 abort ();
14447 if (ent->is_indirect)
14448 ent = ent->got.ent;
14449 offp = &ent->got.offset;
14450 got = ppc64_elf_tdata (ent->owner)->got;
14451 if (got == NULL)
14452 abort ();
14453
14454 /* The offset must always be a multiple of 8. We use the
14455 least significant bit to record whether we have already
14456 processed this entry. */
14457 off = *offp;
14458 if ((off & 1) != 0)
14459 off &= ~1;
14460 else
14461 {
14462 /* Generate relocs for the dynamic linker, except in
14463 the case of TLSLD where we'll use one entry per
14464 module. */
14465 asection *relgot;
14466 bfd_boolean ifunc;
14467
14468 *offp = off | 1;
14469 relgot = NULL;
14470 ifunc = (h != NULL
14471 ? h->elf.type == STT_GNU_IFUNC
14472 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14473 if (ifunc)
14474 relgot = htab->elf.irelplt;
14475 else if (indx != 0
14476 || (bfd_link_pic (info)
14477 && (h == NULL
14478 || (ELF_ST_VISIBILITY (h->elf.other)
14479 == STV_DEFAULT)
14480 || h->elf.root.type != bfd_link_hash_undefweak
14481 || (tls_type == (TLS_TLS | TLS_LD)
14482 && !h->elf.def_dynamic))))
14483 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14484 if (relgot != NULL)
14485 {
14486 outrel.r_offset = (got->output_section->vma
14487 + got->output_offset
14488 + off);
14489 outrel.r_addend = addend;
14490 if (tls_type & (TLS_LD | TLS_GD))
14491 {
14492 outrel.r_addend = 0;
14493 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14494 if (tls_type == (TLS_TLS | TLS_GD))
14495 {
14496 loc = relgot->contents;
14497 loc += (relgot->reloc_count++
14498 * sizeof (Elf64_External_Rela));
14499 bfd_elf64_swap_reloca_out (output_bfd,
14500 &outrel, loc);
14501 outrel.r_offset += 8;
14502 outrel.r_addend = addend;
14503 outrel.r_info
14504 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14505 }
14506 }
14507 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14508 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14509 else if (tls_type == (TLS_TLS | TLS_TPREL))
14510 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14511 else if (indx != 0)
14512 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14513 else
14514 {
14515 if (ifunc)
14516 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14517 else
14518 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14519
14520 /* Write the .got section contents for the sake
14521 of prelink. */
14522 loc = got->contents + off;
14523 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14524 loc);
14525 }
14526
14527 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14528 {
14529 outrel.r_addend += relocation;
14530 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14531 {
14532 if (htab->elf.tls_sec == NULL)
14533 outrel.r_addend = 0;
14534 else
14535 outrel.r_addend -= htab->elf.tls_sec->vma;
14536 }
14537 }
14538 loc = relgot->contents;
14539 loc += (relgot->reloc_count++
14540 * sizeof (Elf64_External_Rela));
14541 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14542 }
14543
14544 /* Init the .got section contents here if we're not
14545 emitting a reloc. */
14546 else
14547 {
14548 int tlsopt
14549 = (htab->params->tls_get_addr_opt
14550 && htab->tls_get_addr_fd != NULL
14551 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
14552
14553 relocation += addend;
14554 if (tls_type != 0)
14555 {
14556 if (htab->elf.tls_sec == NULL)
14557 relocation = 0;
14558 else
14559 {
14560 if (tls_type & TLS_LD)
14561 relocation = 0;
14562 else
14563 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14564 if ((tls_type & TLS_TPREL)
14565 || (tlsopt && !(tls_type & TLS_DTPREL)))
14566 relocation += DTP_OFFSET - TP_OFFSET;
14567 }
14568
14569 if (tls_type & (TLS_GD | TLS_LD))
14570 {
14571 bfd_put_64 (output_bfd, relocation,
14572 got->contents + off + 8);
14573 relocation = !tlsopt;
14574 }
14575 }
14576 bfd_put_64 (output_bfd, relocation,
14577 got->contents + off);
14578 }
14579 }
14580
14581 if (off >= (bfd_vma) -2)
14582 abort ();
14583
14584 relocation = got->output_section->vma + got->output_offset + off;
14585 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14586 }
14587 break;
14588
14589 case R_PPC64_PLT16_HA:
14590 case R_PPC64_PLT16_HI:
14591 case R_PPC64_PLT16_LO:
14592 case R_PPC64_PLT32:
14593 case R_PPC64_PLT64:
14594 /* Relocation is to the entry for this symbol in the
14595 procedure linkage table. */
14596 {
14597 struct plt_entry **plt_list = NULL;
14598 if (h != NULL)
14599 plt_list = &h->elf.plt.plist;
14600 else if (local_got_ents != NULL)
14601 {
14602 struct plt_entry **local_plt = (struct plt_entry **)
14603 (local_got_ents + symtab_hdr->sh_info);
14604 unsigned char *local_got_tls_masks = (unsigned char *)
14605 (local_plt + symtab_hdr->sh_info);
14606 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14607 plt_list = local_plt + r_symndx;
14608 }
14609 if (plt_list)
14610 {
14611 struct plt_entry *ent;
14612
14613 for (ent = *plt_list; ent != NULL; ent = ent->next)
14614 if (ent->plt.offset != (bfd_vma) -1
14615 && ent->addend == orig_rel.r_addend)
14616 {
14617 asection *plt;
14618
14619 plt = htab->elf.splt;
14620 if (!htab->elf.dynamic_sections_created
14621 || h == NULL
14622 || h->elf.dynindx == -1)
14623 plt = htab->elf.iplt;
14624 relocation = (plt->output_section->vma
14625 + plt->output_offset
14626 + ent->plt.offset);
14627 addend = 0;
14628 unresolved_reloc = FALSE;
14629 break;
14630 }
14631 }
14632 }
14633 break;
14634
14635 case R_PPC64_TOC:
14636 /* Relocation value is TOC base. */
14637 relocation = TOCstart;
14638 if (r_symndx == STN_UNDEF)
14639 relocation += htab->sec_info[input_section->id].toc_off;
14640 else if (unresolved_reloc)
14641 ;
14642 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14643 relocation += htab->sec_info[sec->id].toc_off;
14644 else
14645 unresolved_reloc = TRUE;
14646 goto dodyn;
14647
14648 /* TOC16 relocs. We want the offset relative to the TOC base,
14649 which is the address of the start of the TOC plus 0x8000.
14650 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14651 in this order. */
14652 case R_PPC64_TOC16:
14653 case R_PPC64_TOC16_LO:
14654 case R_PPC64_TOC16_HI:
14655 case R_PPC64_TOC16_DS:
14656 case R_PPC64_TOC16_LO_DS:
14657 case R_PPC64_TOC16_HA:
14658 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14659 break;
14660
14661 /* Relocate against the beginning of the section. */
14662 case R_PPC64_SECTOFF:
14663 case R_PPC64_SECTOFF_LO:
14664 case R_PPC64_SECTOFF_HI:
14665 case R_PPC64_SECTOFF_DS:
14666 case R_PPC64_SECTOFF_LO_DS:
14667 case R_PPC64_SECTOFF_HA:
14668 if (sec != NULL)
14669 addend -= sec->output_section->vma;
14670 break;
14671
14672 case R_PPC64_REL16:
14673 case R_PPC64_REL16_LO:
14674 case R_PPC64_REL16_HI:
14675 case R_PPC64_REL16_HA:
14676 case R_PPC64_REL16DX_HA:
14677 break;
14678
14679 case R_PPC64_REL14:
14680 case R_PPC64_REL14_BRNTAKEN:
14681 case R_PPC64_REL14_BRTAKEN:
14682 case R_PPC64_REL24:
14683 break;
14684
14685 case R_PPC64_TPREL16:
14686 case R_PPC64_TPREL16_LO:
14687 case R_PPC64_TPREL16_HI:
14688 case R_PPC64_TPREL16_HA:
14689 case R_PPC64_TPREL16_DS:
14690 case R_PPC64_TPREL16_LO_DS:
14691 case R_PPC64_TPREL16_HIGH:
14692 case R_PPC64_TPREL16_HIGHA:
14693 case R_PPC64_TPREL16_HIGHER:
14694 case R_PPC64_TPREL16_HIGHERA:
14695 case R_PPC64_TPREL16_HIGHEST:
14696 case R_PPC64_TPREL16_HIGHESTA:
14697 if (h != NULL
14698 && h->elf.root.type == bfd_link_hash_undefweak
14699 && h->elf.dynindx == -1)
14700 {
14701 /* Make this relocation against an undefined weak symbol
14702 resolve to zero. This is really just a tweak, since
14703 code using weak externs ought to check that they are
14704 defined before using them. */
14705 bfd_byte *p = contents + rel->r_offset - d_offset;
14706
14707 insn = bfd_get_32 (input_bfd, p);
14708 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14709 if (insn != 0)
14710 bfd_put_32 (input_bfd, insn, p);
14711 break;
14712 }
14713 if (htab->elf.tls_sec != NULL)
14714 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14715 if (bfd_link_pic (info))
14716 /* The TPREL16 relocs shouldn't really be used in shared
14717 libs as they will result in DT_TEXTREL being set, but
14718 support them anyway. */
14719 goto dodyn;
14720 break;
14721
14722 case R_PPC64_DTPREL16:
14723 case R_PPC64_DTPREL16_LO:
14724 case R_PPC64_DTPREL16_HI:
14725 case R_PPC64_DTPREL16_HA:
14726 case R_PPC64_DTPREL16_DS:
14727 case R_PPC64_DTPREL16_LO_DS:
14728 case R_PPC64_DTPREL16_HIGH:
14729 case R_PPC64_DTPREL16_HIGHA:
14730 case R_PPC64_DTPREL16_HIGHER:
14731 case R_PPC64_DTPREL16_HIGHERA:
14732 case R_PPC64_DTPREL16_HIGHEST:
14733 case R_PPC64_DTPREL16_HIGHESTA:
14734 if (htab->elf.tls_sec != NULL)
14735 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14736 break;
14737
14738 case R_PPC64_ADDR64_LOCAL:
14739 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14740 ? h->elf.other
14741 : sym->st_other);
14742 break;
14743
14744 case R_PPC64_DTPMOD64:
14745 relocation = 1;
14746 addend = 0;
14747 goto dodyn;
14748
14749 case R_PPC64_TPREL64:
14750 if (htab->elf.tls_sec != NULL)
14751 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14752 goto dodyn;
14753
14754 case R_PPC64_DTPREL64:
14755 if (htab->elf.tls_sec != NULL)
14756 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14757 /* Fall through. */
14758
14759 /* Relocations that may need to be propagated if this is a
14760 dynamic object. */
14761 case R_PPC64_REL30:
14762 case R_PPC64_REL32:
14763 case R_PPC64_REL64:
14764 case R_PPC64_ADDR14:
14765 case R_PPC64_ADDR14_BRNTAKEN:
14766 case R_PPC64_ADDR14_BRTAKEN:
14767 case R_PPC64_ADDR16:
14768 case R_PPC64_ADDR16_DS:
14769 case R_PPC64_ADDR16_HA:
14770 case R_PPC64_ADDR16_HI:
14771 case R_PPC64_ADDR16_HIGH:
14772 case R_PPC64_ADDR16_HIGHA:
14773 case R_PPC64_ADDR16_HIGHER:
14774 case R_PPC64_ADDR16_HIGHERA:
14775 case R_PPC64_ADDR16_HIGHEST:
14776 case R_PPC64_ADDR16_HIGHESTA:
14777 case R_PPC64_ADDR16_LO:
14778 case R_PPC64_ADDR16_LO_DS:
14779 case R_PPC64_ADDR24:
14780 case R_PPC64_ADDR32:
14781 case R_PPC64_ADDR64:
14782 case R_PPC64_UADDR16:
14783 case R_PPC64_UADDR32:
14784 case R_PPC64_UADDR64:
14785 dodyn:
14786 if ((input_section->flags & SEC_ALLOC) == 0)
14787 break;
14788
14789 if (NO_OPD_RELOCS && is_opd)
14790 break;
14791
14792 if (bfd_link_pic (info)
14793 ? ((h != NULL && pc_dynrelocs (h))
14794 || must_be_dyn_reloc (info, r_type))
14795 : (h != NULL
14796 ? h->dyn_relocs != NULL
14797 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14798 {
14799 bfd_boolean skip, relocate;
14800 asection *sreloc;
14801 bfd_vma out_off;
14802
14803 /* When generating a dynamic object, these relocations
14804 are copied into the output file to be resolved at run
14805 time. */
14806
14807 skip = FALSE;
14808 relocate = FALSE;
14809
14810 out_off = _bfd_elf_section_offset (output_bfd, info,
14811 input_section, rel->r_offset);
14812 if (out_off == (bfd_vma) -1)
14813 skip = TRUE;
14814 else if (out_off == (bfd_vma) -2)
14815 skip = TRUE, relocate = TRUE;
14816 out_off += (input_section->output_section->vma
14817 + input_section->output_offset);
14818 outrel.r_offset = out_off;
14819 outrel.r_addend = rel->r_addend;
14820
14821 /* Optimize unaligned reloc use. */
14822 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14823 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14824 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14825 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14826 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14827 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14828 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14829 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14830 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14831
14832 if (skip)
14833 memset (&outrel, 0, sizeof outrel);
14834 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14835 && !is_opd
14836 && r_type != R_PPC64_TOC)
14837 {
14838 BFD_ASSERT (h->elf.dynindx != -1);
14839 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14840 }
14841 else
14842 {
14843 /* This symbol is local, or marked to become local,
14844 or this is an opd section reloc which must point
14845 at a local function. */
14846 outrel.r_addend += relocation;
14847 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14848 {
14849 if (is_opd && h != NULL)
14850 {
14851 /* Lie about opd entries. This case occurs
14852 when building shared libraries and we
14853 reference a function in another shared
14854 lib. The same thing happens for a weak
14855 definition in an application that's
14856 overridden by a strong definition in a
14857 shared lib. (I believe this is a generic
14858 bug in binutils handling of weak syms.)
14859 In these cases we won't use the opd
14860 entry in this lib. */
14861 unresolved_reloc = FALSE;
14862 }
14863 if (!is_opd
14864 && r_type == R_PPC64_ADDR64
14865 && (h != NULL
14866 ? h->elf.type == STT_GNU_IFUNC
14867 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14868 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14869 else
14870 {
14871 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14872
14873 /* We need to relocate .opd contents for ld.so.
14874 Prelink also wants simple and consistent rules
14875 for relocs. This make all RELATIVE relocs have
14876 *r_offset equal to r_addend. */
14877 relocate = TRUE;
14878 }
14879 }
14880 else
14881 {
14882 long indx = 0;
14883
14884 if (h != NULL
14885 ? h->elf.type == STT_GNU_IFUNC
14886 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14887 {
14888 info->callbacks->einfo
14889 /* xgettext:c-format */
14890 (_("%H: %s for indirect "
14891 "function `%T' unsupported\n"),
14892 input_bfd, input_section, rel->r_offset,
14893 ppc64_elf_howto_table[r_type]->name,
14894 sym_name);
14895 ret = FALSE;
14896 }
14897 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14898 ;
14899 else if (sec == NULL || sec->owner == NULL)
14900 {
14901 bfd_set_error (bfd_error_bad_value);
14902 return FALSE;
14903 }
14904 else
14905 {
14906 asection *osec;
14907
14908 osec = sec->output_section;
14909 indx = elf_section_data (osec)->dynindx;
14910
14911 if (indx == 0)
14912 {
14913 if ((osec->flags & SEC_READONLY) == 0
14914 && htab->elf.data_index_section != NULL)
14915 osec = htab->elf.data_index_section;
14916 else
14917 osec = htab->elf.text_index_section;
14918 indx = elf_section_data (osec)->dynindx;
14919 }
14920 BFD_ASSERT (indx != 0);
14921
14922 /* We are turning this relocation into one
14923 against a section symbol, so subtract out
14924 the output section's address but not the
14925 offset of the input section in the output
14926 section. */
14927 outrel.r_addend -= osec->vma;
14928 }
14929
14930 outrel.r_info = ELF64_R_INFO (indx, r_type);
14931 }
14932 }
14933
14934 sreloc = elf_section_data (input_section)->sreloc;
14935 if (h != NULL
14936 ? h->elf.type == STT_GNU_IFUNC
14937 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14938 sreloc = htab->elf.irelplt;
14939 if (sreloc == NULL)
14940 abort ();
14941
14942 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14943 >= sreloc->size)
14944 abort ();
14945 loc = sreloc->contents;
14946 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14947 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14948
14949 /* If this reloc is against an external symbol, it will
14950 be computed at runtime, so there's no need to do
14951 anything now. However, for the sake of prelink ensure
14952 that the section contents are a known value. */
14953 if (! relocate)
14954 {
14955 unresolved_reloc = FALSE;
14956 /* The value chosen here is quite arbitrary as ld.so
14957 ignores section contents except for the special
14958 case of .opd where the contents might be accessed
14959 before relocation. Choose zero, as that won't
14960 cause reloc overflow. */
14961 relocation = 0;
14962 addend = 0;
14963 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14964 to improve backward compatibility with older
14965 versions of ld. */
14966 if (r_type == R_PPC64_ADDR64)
14967 addend = outrel.r_addend;
14968 /* Adjust pc_relative relocs to have zero in *r_offset. */
14969 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14970 addend = outrel.r_offset;
14971 }
14972 }
14973 else if (r_type == R_PPC64_DTPMOD64
14974 && htab->params->tls_get_addr_opt
14975 && htab->tls_get_addr_fd != NULL
14976 && htab->tls_get_addr_fd->elf.plt.plist != NULL)
14977 {
14978 /* Set up for __tls_get_addr_opt stub, when this entry
14979 does not have dynamic relocs. */
14980 relocation = 0;
14981 /* Set up the next word for local dynamic. If it turns
14982 out to be global dynamic, the reloc will overwrite
14983 this value. */
14984 if (rel->r_offset + 16 <= input_section->size)
14985 bfd_put_64 (input_bfd, DTP_OFFSET - TP_OFFSET,
14986 contents + rel->r_offset + 8);
14987 }
14988 else if (r_type == R_PPC64_DTPREL64
14989 && htab->params->tls_get_addr_opt
14990 && htab->tls_get_addr_fd != NULL
14991 && htab->tls_get_addr_fd->elf.plt.plist != NULL
14992 && rel > relocs
14993 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
14994 && rel[-1].r_offset + 8 == rel->r_offset)
14995 {
14996 /* __tls_get_addr_opt stub value. */
14997 addend += DTP_OFFSET - TP_OFFSET;
14998 }
14999 break;
15000
15001 case R_PPC64_COPY:
15002 case R_PPC64_GLOB_DAT:
15003 case R_PPC64_JMP_SLOT:
15004 case R_PPC64_JMP_IREL:
15005 case R_PPC64_RELATIVE:
15006 /* We shouldn't ever see these dynamic relocs in relocatable
15007 files. */
15008 /* Fall through. */
15009
15010 case R_PPC64_PLTGOT16:
15011 case R_PPC64_PLTGOT16_DS:
15012 case R_PPC64_PLTGOT16_HA:
15013 case R_PPC64_PLTGOT16_HI:
15014 case R_PPC64_PLTGOT16_LO:
15015 case R_PPC64_PLTGOT16_LO_DS:
15016 case R_PPC64_PLTREL32:
15017 case R_PPC64_PLTREL64:
15018 /* These ones haven't been implemented yet. */
15019
15020 info->callbacks->einfo
15021 /* xgettext:c-format */
15022 (_("%P: %B: %s is not supported for `%T'\n"),
15023 input_bfd,
15024 ppc64_elf_howto_table[r_type]->name, sym_name);
15025
15026 bfd_set_error (bfd_error_invalid_operation);
15027 ret = FALSE;
15028 goto copy_reloc;
15029 }
15030
15031 /* Multi-instruction sequences that access the TOC can be
15032 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15033 to nop; addi rb,r2,x; */
15034 switch (r_type)
15035 {
15036 default:
15037 break;
15038
15039 case R_PPC64_GOT_TLSLD16_HI:
15040 case R_PPC64_GOT_TLSGD16_HI:
15041 case R_PPC64_GOT_TPREL16_HI:
15042 case R_PPC64_GOT_DTPREL16_HI:
15043 case R_PPC64_GOT16_HI:
15044 case R_PPC64_TOC16_HI:
15045 /* These relocs would only be useful if building up an
15046 offset to later add to r2, perhaps in an indexed
15047 addressing mode instruction. Don't try to optimize.
15048 Unfortunately, the possibility of someone building up an
15049 offset like this or even with the HA relocs, means that
15050 we need to check the high insn when optimizing the low
15051 insn. */
15052 break;
15053
15054 case R_PPC64_GOT_TLSLD16_HA:
15055 case R_PPC64_GOT_TLSGD16_HA:
15056 case R_PPC64_GOT_TPREL16_HA:
15057 case R_PPC64_GOT_DTPREL16_HA:
15058 case R_PPC64_GOT16_HA:
15059 case R_PPC64_TOC16_HA:
15060 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15061 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15062 {
15063 bfd_byte *p = contents + (rel->r_offset & ~3);
15064 bfd_put_32 (input_bfd, NOP, p);
15065 }
15066 break;
15067
15068 case R_PPC64_GOT_TLSLD16_LO:
15069 case R_PPC64_GOT_TLSGD16_LO:
15070 case R_PPC64_GOT_TPREL16_LO_DS:
15071 case R_PPC64_GOT_DTPREL16_LO_DS:
15072 case R_PPC64_GOT16_LO:
15073 case R_PPC64_GOT16_LO_DS:
15074 case R_PPC64_TOC16_LO:
15075 case R_PPC64_TOC16_LO_DS:
15076 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15077 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15078 {
15079 bfd_byte *p = contents + (rel->r_offset & ~3);
15080 insn = bfd_get_32 (input_bfd, p);
15081 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15082 {
15083 /* Transform addic to addi when we change reg. */
15084 insn &= ~((0x3f << 26) | (0x1f << 16));
15085 insn |= (14u << 26) | (2 << 16);
15086 }
15087 else
15088 {
15089 insn &= ~(0x1f << 16);
15090 insn |= 2 << 16;
15091 }
15092 bfd_put_32 (input_bfd, insn, p);
15093 }
15094 break;
15095 }
15096
15097 /* Do any further special processing. */
15098 howto = ppc64_elf_howto_table[(int) r_type];
15099 switch (r_type)
15100 {
15101 default:
15102 break;
15103
15104 case R_PPC64_REL16_HA:
15105 case R_PPC64_REL16DX_HA:
15106 case R_PPC64_ADDR16_HA:
15107 case R_PPC64_ADDR16_HIGHA:
15108 case R_PPC64_ADDR16_HIGHERA:
15109 case R_PPC64_ADDR16_HIGHESTA:
15110 case R_PPC64_TOC16_HA:
15111 case R_PPC64_SECTOFF_HA:
15112 case R_PPC64_TPREL16_HA:
15113 case R_PPC64_TPREL16_HIGHA:
15114 case R_PPC64_TPREL16_HIGHERA:
15115 case R_PPC64_TPREL16_HIGHESTA:
15116 case R_PPC64_DTPREL16_HA:
15117 case R_PPC64_DTPREL16_HIGHA:
15118 case R_PPC64_DTPREL16_HIGHERA:
15119 case R_PPC64_DTPREL16_HIGHESTA:
15120 /* It's just possible that this symbol is a weak symbol
15121 that's not actually defined anywhere. In that case,
15122 'sec' would be NULL, and we should leave the symbol
15123 alone (it will be set to zero elsewhere in the link). */
15124 if (sec == NULL)
15125 break;
15126 /* Fall through. */
15127
15128 case R_PPC64_GOT16_HA:
15129 case R_PPC64_PLTGOT16_HA:
15130 case R_PPC64_PLT16_HA:
15131 case R_PPC64_GOT_TLSGD16_HA:
15132 case R_PPC64_GOT_TLSLD16_HA:
15133 case R_PPC64_GOT_TPREL16_HA:
15134 case R_PPC64_GOT_DTPREL16_HA:
15135 /* Add 0x10000 if sign bit in 0:15 is set.
15136 Bits 0:15 are not used. */
15137 addend += 0x8000;
15138 break;
15139
15140 case R_PPC64_ADDR16_DS:
15141 case R_PPC64_ADDR16_LO_DS:
15142 case R_PPC64_GOT16_DS:
15143 case R_PPC64_GOT16_LO_DS:
15144 case R_PPC64_PLT16_LO_DS:
15145 case R_PPC64_SECTOFF_DS:
15146 case R_PPC64_SECTOFF_LO_DS:
15147 case R_PPC64_TOC16_DS:
15148 case R_PPC64_TOC16_LO_DS:
15149 case R_PPC64_PLTGOT16_DS:
15150 case R_PPC64_PLTGOT16_LO_DS:
15151 case R_PPC64_GOT_TPREL16_DS:
15152 case R_PPC64_GOT_TPREL16_LO_DS:
15153 case R_PPC64_GOT_DTPREL16_DS:
15154 case R_PPC64_GOT_DTPREL16_LO_DS:
15155 case R_PPC64_TPREL16_DS:
15156 case R_PPC64_TPREL16_LO_DS:
15157 case R_PPC64_DTPREL16_DS:
15158 case R_PPC64_DTPREL16_LO_DS:
15159 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15160 mask = 3;
15161 /* If this reloc is against an lq, lxv, or stxv insn, then
15162 the value must be a multiple of 16. This is somewhat of
15163 a hack, but the "correct" way to do this by defining _DQ
15164 forms of all the _DS relocs bloats all reloc switches in
15165 this file. It doesn't make much sense to use these
15166 relocs in data, so testing the insn should be safe. */
15167 if ((insn & (0x3f << 26)) == (56u << 26)
15168 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15169 mask = 15;
15170 relocation += addend;
15171 addend = insn & (mask ^ 3);
15172 if ((relocation & mask) != 0)
15173 {
15174 relocation ^= relocation & mask;
15175 info->callbacks->einfo
15176 /* xgettext:c-format */
15177 (_("%H: error: %s not a multiple of %u\n"),
15178 input_bfd, input_section, rel->r_offset,
15179 howto->name,
15180 mask + 1);
15181 bfd_set_error (bfd_error_bad_value);
15182 ret = FALSE;
15183 goto copy_reloc;
15184 }
15185 break;
15186 }
15187
15188 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15189 because such sections are not SEC_ALLOC and thus ld.so will
15190 not process them. */
15191 if (unresolved_reloc
15192 && !((input_section->flags & SEC_DEBUGGING) != 0
15193 && h->elf.def_dynamic)
15194 && _bfd_elf_section_offset (output_bfd, info, input_section,
15195 rel->r_offset) != (bfd_vma) -1)
15196 {
15197 info->callbacks->einfo
15198 /* xgettext:c-format */
15199 (_("%H: unresolvable %s against `%T'\n"),
15200 input_bfd, input_section, rel->r_offset,
15201 howto->name,
15202 h->elf.root.root.string);
15203 ret = FALSE;
15204 }
15205
15206 /* 16-bit fields in insns mostly have signed values, but a
15207 few insns have 16-bit unsigned values. Really, we should
15208 have different reloc types. */
15209 if (howto->complain_on_overflow != complain_overflow_dont
15210 && howto->dst_mask == 0xffff
15211 && (input_section->flags & SEC_CODE) != 0)
15212 {
15213 enum complain_overflow complain = complain_overflow_signed;
15214
15215 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15216 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15217 complain = complain_overflow_bitfield;
15218 else if (howto->rightshift == 0
15219 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15220 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15221 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15222 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15223 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15224 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15225 complain = complain_overflow_unsigned;
15226 if (howto->complain_on_overflow != complain)
15227 {
15228 alt_howto = *howto;
15229 alt_howto.complain_on_overflow = complain;
15230 howto = &alt_howto;
15231 }
15232 }
15233
15234 if (r_type == R_PPC64_REL16DX_HA)
15235 {
15236 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15237 if (rel->r_offset + 4 > input_section->size)
15238 r = bfd_reloc_outofrange;
15239 else
15240 {
15241 relocation += addend;
15242 relocation -= (rel->r_offset
15243 + input_section->output_offset
15244 + input_section->output_section->vma);
15245 relocation = (bfd_signed_vma) relocation >> 16;
15246 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15247 insn &= ~0x1fffc1;
15248 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15249 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15250 r = bfd_reloc_ok;
15251 if (relocation + 0x8000 > 0xffff)
15252 r = bfd_reloc_overflow;
15253 }
15254 }
15255 else
15256 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15257 rel->r_offset, relocation, addend);
15258
15259 if (r != bfd_reloc_ok)
15260 {
15261 char *more_info = NULL;
15262 const char *reloc_name = howto->name;
15263
15264 if (reloc_dest != DEST_NORMAL)
15265 {
15266 more_info = bfd_malloc (strlen (reloc_name) + 8);
15267 if (more_info != NULL)
15268 {
15269 strcpy (more_info, reloc_name);
15270 strcat (more_info, (reloc_dest == DEST_OPD
15271 ? " (OPD)" : " (stub)"));
15272 reloc_name = more_info;
15273 }
15274 }
15275
15276 if (r == bfd_reloc_overflow)
15277 {
15278 /* On code like "if (foo) foo();" don't report overflow
15279 on a branch to zero when foo is undefined. */
15280 if (!warned
15281 && (reloc_dest == DEST_STUB
15282 || !(h != NULL
15283 && (h->elf.root.type == bfd_link_hash_undefweak
15284 || h->elf.root.type == bfd_link_hash_undefined)
15285 && is_branch_reloc (r_type))))
15286 info->callbacks->reloc_overflow (info, &h->elf.root,
15287 sym_name, reloc_name,
15288 orig_rel.r_addend,
15289 input_bfd, input_section,
15290 rel->r_offset);
15291 }
15292 else
15293 {
15294 info->callbacks->einfo
15295 /* xgettext:c-format */
15296 (_("%H: %s against `%T': error %d\n"),
15297 input_bfd, input_section, rel->r_offset,
15298 reloc_name, sym_name, (int) r);
15299 ret = FALSE;
15300 }
15301 if (more_info != NULL)
15302 free (more_info);
15303 }
15304 copy_reloc:
15305 if (wrel != rel)
15306 *wrel = *rel;
15307 }
15308
15309 if (wrel != rel)
15310 {
15311 Elf_Internal_Shdr *rel_hdr;
15312 size_t deleted = rel - wrel;
15313
15314 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15315 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15316 if (rel_hdr->sh_size == 0)
15317 {
15318 /* It is too late to remove an empty reloc section. Leave
15319 one NONE reloc.
15320 ??? What is wrong with an empty section??? */
15321 rel_hdr->sh_size = rel_hdr->sh_entsize;
15322 deleted -= 1;
15323 }
15324 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15325 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15326 input_section->reloc_count -= deleted;
15327 }
15328
15329 /* If we're emitting relocations, then shortly after this function
15330 returns, reloc offsets and addends for this section will be
15331 adjusted. Worse, reloc symbol indices will be for the output
15332 file rather than the input. Save a copy of the relocs for
15333 opd_entry_value. */
15334 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15335 {
15336 bfd_size_type amt;
15337 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15338 rel = bfd_alloc (input_bfd, amt);
15339 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15340 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15341 if (rel == NULL)
15342 return FALSE;
15343 memcpy (rel, relocs, amt);
15344 }
15345 return ret;
15346 }
15347
15348 /* Adjust the value of any local symbols in opd sections. */
15349
15350 static int
15351 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15352 const char *name ATTRIBUTE_UNUSED,
15353 Elf_Internal_Sym *elfsym,
15354 asection *input_sec,
15355 struct elf_link_hash_entry *h)
15356 {
15357 struct _opd_sec_data *opd;
15358 long adjust;
15359 bfd_vma value;
15360
15361 if (h != NULL)
15362 return 1;
15363
15364 opd = get_opd_info (input_sec);
15365 if (opd == NULL || opd->adjust == NULL)
15366 return 1;
15367
15368 value = elfsym->st_value - input_sec->output_offset;
15369 if (!bfd_link_relocatable (info))
15370 value -= input_sec->output_section->vma;
15371
15372 adjust = opd->adjust[OPD_NDX (value)];
15373 if (adjust == -1)
15374 return 2;
15375
15376 elfsym->st_value += adjust;
15377 return 1;
15378 }
15379
15380 /* Finish up dynamic symbol handling. We set the contents of various
15381 dynamic sections here. */
15382
15383 static bfd_boolean
15384 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15385 struct bfd_link_info *info,
15386 struct elf_link_hash_entry *h,
15387 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15388 {
15389 struct ppc_link_hash_table *htab;
15390 struct plt_entry *ent;
15391 Elf_Internal_Rela rela;
15392 bfd_byte *loc;
15393
15394 htab = ppc_hash_table (info);
15395 if (htab == NULL)
15396 return FALSE;
15397
15398 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15399 if (ent->plt.offset != (bfd_vma) -1)
15400 {
15401 /* This symbol has an entry in the procedure linkage
15402 table. Set it up. */
15403 if (!htab->elf.dynamic_sections_created
15404 || h->dynindx == -1)
15405 {
15406 BFD_ASSERT (h->type == STT_GNU_IFUNC
15407 && h->def_regular
15408 && (h->root.type == bfd_link_hash_defined
15409 || h->root.type == bfd_link_hash_defweak));
15410 rela.r_offset = (htab->elf.iplt->output_section->vma
15411 + htab->elf.iplt->output_offset
15412 + ent->plt.offset);
15413 if (htab->opd_abi)
15414 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15415 else
15416 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15417 rela.r_addend = (h->root.u.def.value
15418 + h->root.u.def.section->output_offset
15419 + h->root.u.def.section->output_section->vma
15420 + ent->addend);
15421 loc = (htab->elf.irelplt->contents
15422 + (htab->elf.irelplt->reloc_count++
15423 * sizeof (Elf64_External_Rela)));
15424 }
15425 else
15426 {
15427 rela.r_offset = (htab->elf.splt->output_section->vma
15428 + htab->elf.splt->output_offset
15429 + ent->plt.offset);
15430 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15431 rela.r_addend = ent->addend;
15432 loc = (htab->elf.srelplt->contents
15433 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15434 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15435 }
15436 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15437
15438 if (!htab->opd_abi)
15439 {
15440 if (!h->def_regular)
15441 {
15442 /* Mark the symbol as undefined, rather than as
15443 defined in glink. Leave the value if there were
15444 any relocations where pointer equality matters
15445 (this is a clue for the dynamic linker, to make
15446 function pointer comparisons work between an
15447 application and shared library), otherwise set it
15448 to zero. */
15449 sym->st_shndx = SHN_UNDEF;
15450 if (!h->pointer_equality_needed)
15451 sym->st_value = 0;
15452 else if (!h->ref_regular_nonweak)
15453 {
15454 /* This breaks function pointer comparisons, but
15455 that is better than breaking tests for a NULL
15456 function pointer. */
15457 sym->st_value = 0;
15458 }
15459 }
15460 }
15461 }
15462
15463 if (h->needs_copy)
15464 {
15465 /* This symbol needs a copy reloc. Set it up. */
15466 asection *srel;
15467
15468 if (h->dynindx == -1
15469 || (h->root.type != bfd_link_hash_defined
15470 && h->root.type != bfd_link_hash_defweak)
15471 || htab->elf.srelbss == NULL
15472 || htab->elf.sreldynrelro == NULL)
15473 abort ();
15474
15475 rela.r_offset = (h->root.u.def.value
15476 + h->root.u.def.section->output_section->vma
15477 + h->root.u.def.section->output_offset);
15478 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15479 rela.r_addend = 0;
15480 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
15481 srel = htab->elf.sreldynrelro;
15482 else
15483 srel = htab->elf.srelbss;
15484 loc = srel->contents;
15485 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15486 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15487 }
15488
15489 return TRUE;
15490 }
15491
15492 /* Used to decide how to sort relocs in an optimal manner for the
15493 dynamic linker, before writing them out. */
15494
15495 static enum elf_reloc_type_class
15496 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15497 const asection *rel_sec,
15498 const Elf_Internal_Rela *rela)
15499 {
15500 enum elf_ppc64_reloc_type r_type;
15501 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15502
15503 if (rel_sec == htab->elf.irelplt)
15504 return reloc_class_ifunc;
15505
15506 r_type = ELF64_R_TYPE (rela->r_info);
15507 switch (r_type)
15508 {
15509 case R_PPC64_RELATIVE:
15510 return reloc_class_relative;
15511 case R_PPC64_JMP_SLOT:
15512 return reloc_class_plt;
15513 case R_PPC64_COPY:
15514 return reloc_class_copy;
15515 default:
15516 return reloc_class_normal;
15517 }
15518 }
15519
15520 /* Finish up the dynamic sections. */
15521
15522 static bfd_boolean
15523 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15524 struct bfd_link_info *info)
15525 {
15526 struct ppc_link_hash_table *htab;
15527 bfd *dynobj;
15528 asection *sdyn;
15529
15530 htab = ppc_hash_table (info);
15531 if (htab == NULL)
15532 return FALSE;
15533
15534 dynobj = htab->elf.dynobj;
15535 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15536
15537 if (htab->elf.dynamic_sections_created)
15538 {
15539 Elf64_External_Dyn *dyncon, *dynconend;
15540
15541 if (sdyn == NULL || htab->elf.sgot == NULL)
15542 abort ();
15543
15544 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15545 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15546 for (; dyncon < dynconend; dyncon++)
15547 {
15548 Elf_Internal_Dyn dyn;
15549 asection *s;
15550
15551 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15552
15553 switch (dyn.d_tag)
15554 {
15555 default:
15556 continue;
15557
15558 case DT_PPC64_GLINK:
15559 s = htab->glink;
15560 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15561 /* We stupidly defined DT_PPC64_GLINK to be the start
15562 of glink rather than the first entry point, which is
15563 what ld.so needs, and now have a bigger stub to
15564 support automatic multiple TOCs. */
15565 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15566 break;
15567
15568 case DT_PPC64_OPD:
15569 s = bfd_get_section_by_name (output_bfd, ".opd");
15570 if (s == NULL)
15571 continue;
15572 dyn.d_un.d_ptr = s->vma;
15573 break;
15574
15575 case DT_PPC64_OPT:
15576 if (htab->do_multi_toc && htab->multi_toc_needed)
15577 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15578 break;
15579
15580 case DT_PPC64_OPDSZ:
15581 s = bfd_get_section_by_name (output_bfd, ".opd");
15582 if (s == NULL)
15583 continue;
15584 dyn.d_un.d_val = s->size;
15585 break;
15586
15587 case DT_PLTGOT:
15588 s = htab->elf.splt;
15589 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15590 break;
15591
15592 case DT_JMPREL:
15593 s = htab->elf.srelplt;
15594 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15595 break;
15596
15597 case DT_PLTRELSZ:
15598 dyn.d_un.d_val = htab->elf.srelplt->size;
15599 break;
15600 }
15601
15602 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15603 }
15604 }
15605
15606 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15607 {
15608 /* Fill in the first entry in the global offset table.
15609 We use it to hold the link-time TOCbase. */
15610 bfd_put_64 (output_bfd,
15611 elf_gp (output_bfd) + TOC_BASE_OFF,
15612 htab->elf.sgot->contents);
15613
15614 /* Set .got entry size. */
15615 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15616 }
15617
15618 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15619 {
15620 /* Set .plt entry size. */
15621 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15622 = PLT_ENTRY_SIZE (htab);
15623 }
15624
15625 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15626 brlt ourselves if emitrelocations. */
15627 if (htab->brlt != NULL
15628 && htab->brlt->reloc_count != 0
15629 && !_bfd_elf_link_output_relocs (output_bfd,
15630 htab->brlt,
15631 elf_section_data (htab->brlt)->rela.hdr,
15632 elf_section_data (htab->brlt)->relocs,
15633 NULL))
15634 return FALSE;
15635
15636 if (htab->glink != NULL
15637 && htab->glink->reloc_count != 0
15638 && !_bfd_elf_link_output_relocs (output_bfd,
15639 htab->glink,
15640 elf_section_data (htab->glink)->rela.hdr,
15641 elf_section_data (htab->glink)->relocs,
15642 NULL))
15643 return FALSE;
15644
15645 if (htab->glink_eh_frame != NULL
15646 && htab->glink_eh_frame->size != 0)
15647 {
15648 bfd_vma val;
15649 bfd_byte *p;
15650 asection *stub_sec;
15651
15652 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15653 for (stub_sec = htab->params->stub_bfd->sections;
15654 stub_sec != NULL;
15655 stub_sec = stub_sec->next)
15656 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15657 {
15658 /* FDE length. */
15659 p += 4;
15660 /* CIE pointer. */
15661 p += 4;
15662 /* Offset to stub section. */
15663 val = (stub_sec->output_section->vma
15664 + stub_sec->output_offset);
15665 val -= (htab->glink_eh_frame->output_section->vma
15666 + htab->glink_eh_frame->output_offset
15667 + (p - htab->glink_eh_frame->contents));
15668 if (val + 0x80000000 > 0xffffffff)
15669 {
15670 info->callbacks->einfo
15671 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15672 stub_sec->name);
15673 return FALSE;
15674 }
15675 bfd_put_32 (dynobj, val, p);
15676 p += 4;
15677 /* stub section size. */
15678 p += 4;
15679 /* Augmentation. */
15680 p += 1;
15681 /* Pad. */
15682 p += 7;
15683 }
15684 if (htab->glink != NULL && htab->glink->size != 0)
15685 {
15686 /* FDE length. */
15687 p += 4;
15688 /* CIE pointer. */
15689 p += 4;
15690 /* Offset to .glink. */
15691 val = (htab->glink->output_section->vma
15692 + htab->glink->output_offset
15693 + 8);
15694 val -= (htab->glink_eh_frame->output_section->vma
15695 + htab->glink_eh_frame->output_offset
15696 + (p - htab->glink_eh_frame->contents));
15697 if (val + 0x80000000 > 0xffffffff)
15698 {
15699 info->callbacks->einfo
15700 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15701 htab->glink->name);
15702 return FALSE;
15703 }
15704 bfd_put_32 (dynobj, val, p);
15705 p += 4;
15706 /* .glink size. */
15707 p += 4;
15708 /* Augmentation. */
15709 p += 1;
15710 /* Ops. */
15711 p += 7;
15712 }
15713
15714 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15715 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15716 htab->glink_eh_frame,
15717 htab->glink_eh_frame->contents))
15718 return FALSE;
15719 }
15720
15721 /* We need to handle writing out multiple GOT sections ourselves,
15722 since we didn't add them to DYNOBJ. We know dynobj is the first
15723 bfd. */
15724 while ((dynobj = dynobj->link.next) != NULL)
15725 {
15726 asection *s;
15727
15728 if (!is_ppc64_elf (dynobj))
15729 continue;
15730
15731 s = ppc64_elf_tdata (dynobj)->got;
15732 if (s != NULL
15733 && s->size != 0
15734 && s->output_section != bfd_abs_section_ptr
15735 && !bfd_set_section_contents (output_bfd, s->output_section,
15736 s->contents, s->output_offset,
15737 s->size))
15738 return FALSE;
15739 s = ppc64_elf_tdata (dynobj)->relgot;
15740 if (s != NULL
15741 && s->size != 0
15742 && s->output_section != bfd_abs_section_ptr
15743 && !bfd_set_section_contents (output_bfd, s->output_section,
15744 s->contents, s->output_offset,
15745 s->size))
15746 return FALSE;
15747 }
15748
15749 return TRUE;
15750 }
15751
15752 #include "elf64-target.h"
15753
15754 /* FreeBSD support */
15755
15756 #undef TARGET_LITTLE_SYM
15757 #undef TARGET_LITTLE_NAME
15758
15759 #undef TARGET_BIG_SYM
15760 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15761 #undef TARGET_BIG_NAME
15762 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15763
15764 #undef ELF_OSABI
15765 #define ELF_OSABI ELFOSABI_FREEBSD
15766
15767 #undef elf64_bed
15768 #define elf64_bed elf64_powerpc_fbsd_bed
15769
15770 #include "elf64-target.h"
15771
GDB Binutils - Deliverables
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