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[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 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* glink call stub instructions. We enter with the index in R0. */
191 #define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
196 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213 /* Pad with this. */
214 #define NOP 0x60000000
215
216 /* Some other nops. */
217 #define CROR_151515 0x4def7b82
218 #define CROR_313131 0x4ffffb82
219
220 /* .glink entries for the first 32k functions are two instructions. */
221 #define LI_R0_0 0x38000000 /* li %r0,0 */
222 #define B_DOT 0x48000000 /* b . */
223
224 /* After that, we need two instructions to load the index, followed by
225 a branch. */
226 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229 /* Instructions used by the save and restore reg functions. */
230 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236 #define LI_R12_0 0x39800000 /* li %r12,0 */
237 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240 #define BLR 0x4e800020 /* blr */
241
242 /* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246 #ifndef NO_OPD_RELOCS
247 #define NO_OPD_RELOCS 0
248 #endif
249
250 #ifndef ARRAY_SIZE
251 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252 #endif
253
254 static inline int
255 abiversion (bfd *abfd)
256 {
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258 }
259
260 static inline void
261 set_abiversion (bfd *abfd, int ver)
262 {
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265 }
266 \f
267 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269 /* Relocation HOWTO's. */
270 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272 static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213 };
2214
2215 \f
2216 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219 static void
2220 ppc_howto_init (void)
2221 {
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230 }
2231
2232 static reloc_howto_type *
2233 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235 {
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484 };
2485
2486 static reloc_howto_type *
2487 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489 {
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498 }
2499
2500 /* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502 static void
2503 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505 {
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521 }
2522
2523 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525 static bfd_reloc_status_type
2526 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529 {
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569 }
2570
2571 static bfd_reloc_status_type
2572 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575 {
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679 }
2680
2681 static bfd_reloc_status_type
2682 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
2685 {
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738 return bfd_reloc_continue;
2739 }
2740
2741 static bfd_reloc_status_type
2742 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745 {
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811 }
2812
2813 /* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815 struct got_entry
2816 {
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845 };
2846
2847 /* The same for PLT. */
2848 struct plt_entry
2849 {
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859 };
2860
2861 struct ppc64_elf_obj_tdata
2862 {
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892 };
2893
2894 #define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897 #define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900 #define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904 /* Override the generic function because we store some extras. */
2905
2906 static bfd_boolean
2907 ppc64_elf_mkobject (bfd *abfd)
2908 {
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911 }
2912
2913 /* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916 static bfd_boolean
2917 ppc64_elf_object_p (bfd *abfd)
2918 {
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934 }
2935
2936 /* Support for core dump NOTE sections. */
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959 }
2960
2961 static bfd_boolean
2962 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963 {
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975 }
2976
2977 static char *
2978 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980 {
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022 }
3023
3024 /* Add extra PPC sections. */
3025
3026 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027 {
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035 };
3036
3037 enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041 };
3042
3043 struct _ppc64_elf_section_data
3044 {
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051 #define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077 };
3078
3079 #define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082 static bfd_boolean
3083 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084 {
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097 }
3098
3099 static struct _opd_sec_data *
3100 get_opd_info (asection * sec)
3101 {
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107 }
3108 \f
3109 /* Parameters for the qsort hook. */
3110 static bfd_boolean synthetic_relocatable;
3111 static asection *synthetic_opd;
3112
3113 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115 static int
3116 compare_symbols (const void *ap, const void *bp)
3117 {
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193 }
3194
3195 /* Search SYMS for a symbol of the given VALUE. */
3196
3197 static asymbol *
3198 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199 {
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233 }
3234
3235 static bfd_boolean
3236 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237 {
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242 }
3243
3244 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248 static long
3249 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253 {
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 syms = NULL;
3274 codesecsym = 0;
3275 codesecsymend = 0;
3276 secsymend = 0;
3277 opdsymend = 0;
3278 symcount = 0;
3279 if (opd != NULL)
3280 {
3281 symcount = static_count;
3282 if (!relocatable)
3283 symcount += dyn_count;
3284 if (symcount == 0)
3285 return 0;
3286
3287 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3288 if (syms == NULL)
3289 return -1;
3290
3291 if (!relocatable && static_count != 0 && dyn_count != 0)
3292 {
3293 /* Use both symbol tables. */
3294 memcpy (syms, static_syms, static_count * sizeof (*syms));
3295 memcpy (syms + static_count, dyn_syms,
3296 (dyn_count + 1) * sizeof (*syms));
3297 }
3298 else if (!relocatable && static_count == 0)
3299 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3300 else
3301 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3302
3303 synthetic_relocatable = relocatable;
3304 synthetic_opd = opd;
3305 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3306
3307 if (!relocatable && symcount > 1)
3308 {
3309 long j;
3310 /* Trim duplicate syms, since we may have merged the normal and
3311 dynamic symbols. Actually, we only care about syms that have
3312 different values, so trim any with the same value. */
3313 for (i = 1, j = 1; i < symcount; ++i)
3314 if (syms[i - 1]->value + syms[i - 1]->section->vma
3315 != syms[i]->value + syms[i]->section->vma)
3316 syms[j++] = syms[i];
3317 symcount = j;
3318 }
3319
3320 i = 0;
3321 /* Note that here and in compare_symbols we can't compare opd and
3322 sym->section directly. With separate debug info files, the
3323 symbols will be extracted from the debug file while abfd passed
3324 to this function is the real binary. */
3325 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3326 ++i;
3327 codesecsym = i;
3328
3329 for (; i < symcount; ++i)
3330 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3331 | SEC_THREAD_LOCAL))
3332 != (SEC_CODE | SEC_ALLOC))
3333 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3334 break;
3335 codesecsymend = i;
3336
3337 for (; i < symcount; ++i)
3338 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3339 break;
3340 secsymend = i;
3341
3342 for (; i < symcount; ++i)
3343 if (strcmp (syms[i]->section->name, ".opd") != 0)
3344 break;
3345 opdsymend = i;
3346
3347 for (; i < symcount; ++i)
3348 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3349 != (SEC_CODE | SEC_ALLOC))
3350 break;
3351 symcount = i;
3352 }
3353 count = 0;
3354
3355 if (relocatable)
3356 {
3357 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3358 arelent *r;
3359 size_t size;
3360 long relcount;
3361
3362 if (opdsymend == secsymend)
3363 goto done;
3364
3365 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3366 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3367 if (relcount == 0)
3368 goto done;
3369
3370 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3371 {
3372 count = -1;
3373 goto done;
3374 }
3375
3376 size = 0;
3377 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3378 {
3379 asymbol *sym;
3380
3381 while (r < opd->relocation + relcount
3382 && r->address < syms[i]->value + opd->vma)
3383 ++r;
3384
3385 if (r == opd->relocation + relcount)
3386 break;
3387
3388 if (r->address != syms[i]->value + opd->vma)
3389 continue;
3390
3391 if (r->howto->type != R_PPC64_ADDR64)
3392 continue;
3393
3394 sym = *r->sym_ptr_ptr;
3395 if (!sym_exists_at (syms, opdsymend, symcount,
3396 sym->section->id, sym->value + r->addend))
3397 {
3398 ++count;
3399 size += sizeof (asymbol);
3400 size += strlen (syms[i]->name) + 2;
3401 }
3402 }
3403
3404 if (size == 0)
3405 goto done;
3406 s = *ret = bfd_malloc (size);
3407 if (s == NULL)
3408 {
3409 count = -1;
3410 goto done;
3411 }
3412
3413 names = (char *) (s + count);
3414
3415 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3416 {
3417 asymbol *sym;
3418
3419 while (r < opd->relocation + relcount
3420 && r->address < syms[i]->value + opd->vma)
3421 ++r;
3422
3423 if (r == opd->relocation + relcount)
3424 break;
3425
3426 if (r->address != syms[i]->value + opd->vma)
3427 continue;
3428
3429 if (r->howto->type != R_PPC64_ADDR64)
3430 continue;
3431
3432 sym = *r->sym_ptr_ptr;
3433 if (!sym_exists_at (syms, opdsymend, symcount,
3434 sym->section->id, sym->value + r->addend))
3435 {
3436 size_t len;
3437
3438 *s = *syms[i];
3439 s->flags |= BSF_SYNTHETIC;
3440 s->section = sym->section;
3441 s->value = sym->value + r->addend;
3442 s->name = names;
3443 *names++ = '.';
3444 len = strlen (syms[i]->name);
3445 memcpy (names, syms[i]->name, len + 1);
3446 names += len + 1;
3447 /* Have udata.p point back to the original symbol this
3448 synthetic symbol was derived from. */
3449 s->udata.p = syms[i];
3450 s++;
3451 }
3452 }
3453 }
3454 else
3455 {
3456 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3457 bfd_byte *contents = NULL;
3458 size_t size;
3459 long plt_count = 0;
3460 bfd_vma glink_vma = 0, resolv_vma = 0;
3461 asection *dynamic, *glink = NULL, *relplt = NULL;
3462 arelent *p;
3463
3464 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3465 {
3466 free_contents_and_exit_err:
3467 count = -1;
3468 free_contents_and_exit:
3469 if (contents)
3470 free (contents);
3471 goto done;
3472 }
3473
3474 size = 0;
3475 for (i = secsymend; i < opdsymend; ++i)
3476 {
3477 bfd_vma ent;
3478
3479 /* Ignore bogus symbols. */
3480 if (syms[i]->value > opd->size - 8)
3481 continue;
3482
3483 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3484 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3485 {
3486 ++count;
3487 size += sizeof (asymbol);
3488 size += strlen (syms[i]->name) + 2;
3489 }
3490 }
3491
3492 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3493 if (dyn_count != 0
3494 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3495 {
3496 bfd_byte *dynbuf, *extdyn, *extdynend;
3497 size_t extdynsize;
3498 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3499
3500 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3501 goto free_contents_and_exit_err;
3502
3503 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3504 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3505
3506 extdyn = dynbuf;
3507 extdynend = extdyn + dynamic->size;
3508 for (; extdyn < extdynend; extdyn += extdynsize)
3509 {
3510 Elf_Internal_Dyn dyn;
3511 (*swap_dyn_in) (abfd, extdyn, &dyn);
3512
3513 if (dyn.d_tag == DT_NULL)
3514 break;
3515
3516 if (dyn.d_tag == DT_PPC64_GLINK)
3517 {
3518 /* The first glink stub starts at offset 32; see
3519 comment in ppc64_elf_finish_dynamic_sections. */
3520 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3521 /* The .glink section usually does not survive the final
3522 link; search for the section (usually .text) where the
3523 glink stubs now reside. */
3524 glink = bfd_sections_find_if (abfd, section_covers_vma,
3525 &glink_vma);
3526 break;
3527 }
3528 }
3529
3530 free (dynbuf);
3531 }
3532
3533 if (glink != NULL)
3534 {
3535 /* Determine __glink trampoline by reading the relative branch
3536 from the first glink stub. */
3537 bfd_byte buf[4];
3538 unsigned int off = 0;
3539
3540 while (bfd_get_section_contents (abfd, glink, buf,
3541 glink_vma + off - glink->vma, 4))
3542 {
3543 unsigned int insn = bfd_get_32 (abfd, buf);
3544 insn ^= B_DOT;
3545 if ((insn & ~0x3fffffc) == 0)
3546 {
3547 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3548 break;
3549 }
3550 off += 4;
3551 if (off > 4)
3552 break;
3553 }
3554
3555 if (resolv_vma)
3556 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3557
3558 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3559 if (relplt != NULL)
3560 {
3561 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3562 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3563 goto free_contents_and_exit_err;
3564
3565 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3566 size += plt_count * sizeof (asymbol);
3567
3568 p = relplt->relocation;
3569 for (i = 0; i < plt_count; i++, p++)
3570 {
3571 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3572 if (p->addend != 0)
3573 size += sizeof ("+0x") - 1 + 16;
3574 }
3575 }
3576 }
3577
3578 if (size == 0)
3579 goto free_contents_and_exit;
3580 s = *ret = bfd_malloc (size);
3581 if (s == NULL)
3582 goto free_contents_and_exit_err;
3583
3584 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3585
3586 for (i = secsymend; i < opdsymend; ++i)
3587 {
3588 bfd_vma ent;
3589
3590 if (syms[i]->value > opd->size - 8)
3591 continue;
3592
3593 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3594 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3595 {
3596 long lo, hi;
3597 size_t len;
3598 asection *sec = abfd->sections;
3599
3600 *s = *syms[i];
3601 lo = codesecsym;
3602 hi = codesecsymend;
3603 while (lo < hi)
3604 {
3605 long mid = (lo + hi) >> 1;
3606 if (syms[mid]->section->vma < ent)
3607 lo = mid + 1;
3608 else if (syms[mid]->section->vma > ent)
3609 hi = mid;
3610 else
3611 {
3612 sec = syms[mid]->section;
3613 break;
3614 }
3615 }
3616
3617 if (lo >= hi && lo > codesecsym)
3618 sec = syms[lo - 1]->section;
3619
3620 for (; sec != NULL; sec = sec->next)
3621 {
3622 if (sec->vma > ent)
3623 break;
3624 /* SEC_LOAD may not be set if SEC is from a separate debug
3625 info file. */
3626 if ((sec->flags & SEC_ALLOC) == 0)
3627 break;
3628 if ((sec->flags & SEC_CODE) != 0)
3629 s->section = sec;
3630 }
3631 s->flags |= BSF_SYNTHETIC;
3632 s->value = ent - s->section->vma;
3633 s->name = names;
3634 *names++ = '.';
3635 len = strlen (syms[i]->name);
3636 memcpy (names, syms[i]->name, len + 1);
3637 names += len + 1;
3638 /* Have udata.p point back to the original symbol this
3639 synthetic symbol was derived from. */
3640 s->udata.p = syms[i];
3641 s++;
3642 }
3643 }
3644 free (contents);
3645
3646 if (glink != NULL && relplt != NULL)
3647 {
3648 if (resolv_vma)
3649 {
3650 /* Add a symbol for the main glink trampoline. */
3651 memset (s, 0, sizeof *s);
3652 s->the_bfd = abfd;
3653 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3654 s->section = glink;
3655 s->value = resolv_vma - glink->vma;
3656 s->name = names;
3657 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3658 names += sizeof ("__glink_PLTresolve");
3659 s++;
3660 count++;
3661 }
3662
3663 /* FIXME: It would be very much nicer to put sym@plt on the
3664 stub rather than on the glink branch table entry. The
3665 objdump disassembler would then use a sensible symbol
3666 name on plt calls. The difficulty in doing so is
3667 a) finding the stubs, and,
3668 b) matching stubs against plt entries, and,
3669 c) there can be multiple stubs for a given plt entry.
3670
3671 Solving (a) could be done by code scanning, but older
3672 ppc64 binaries used different stubs to current code.
3673 (b) is the tricky one since you need to known the toc
3674 pointer for at least one function that uses a pic stub to
3675 be able to calculate the plt address referenced.
3676 (c) means gdb would need to set multiple breakpoints (or
3677 find the glink branch itself) when setting breakpoints
3678 for pending shared library loads. */
3679 p = relplt->relocation;
3680 for (i = 0; i < plt_count; i++, p++)
3681 {
3682 size_t len;
3683
3684 *s = **p->sym_ptr_ptr;
3685 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3686 we are defining a symbol, ensure one of them is set. */
3687 if ((s->flags & BSF_LOCAL) == 0)
3688 s->flags |= BSF_GLOBAL;
3689 s->flags |= BSF_SYNTHETIC;
3690 s->section = glink;
3691 s->value = glink_vma - glink->vma;
3692 s->name = names;
3693 s->udata.p = NULL;
3694 len = strlen ((*p->sym_ptr_ptr)->name);
3695 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3696 names += len;
3697 if (p->addend != 0)
3698 {
3699 memcpy (names, "+0x", sizeof ("+0x") - 1);
3700 names += sizeof ("+0x") - 1;
3701 bfd_sprintf_vma (abfd, names, p->addend);
3702 names += strlen (names);
3703 }
3704 memcpy (names, "@plt", sizeof ("@plt"));
3705 names += sizeof ("@plt");
3706 s++;
3707 if (abi < 2)
3708 {
3709 glink_vma += 8;
3710 if (i >= 0x8000)
3711 glink_vma += 4;
3712 }
3713 else
3714 glink_vma += 4;
3715 }
3716 count += plt_count;
3717 }
3718 }
3719
3720 done:
3721 free (syms);
3722 return count;
3723 }
3724 \f
3725 /* The following functions are specific to the ELF linker, while
3726 functions above are used generally. Those named ppc64_elf_* are
3727 called by the main ELF linker code. They appear in this file more
3728 or less in the order in which they are called. eg.
3729 ppc64_elf_check_relocs is called early in the link process,
3730 ppc64_elf_finish_dynamic_sections is one of the last functions
3731 called.
3732
3733 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3734 functions have both a function code symbol and a function descriptor
3735 symbol. A call to foo in a relocatable object file looks like:
3736
3737 . .text
3738 . x:
3739 . bl .foo
3740 . nop
3741
3742 The function definition in another object file might be:
3743
3744 . .section .opd
3745 . foo: .quad .foo
3746 . .quad .TOC.@tocbase
3747 . .quad 0
3748 .
3749 . .text
3750 . .foo: blr
3751
3752 When the linker resolves the call during a static link, the branch
3753 unsurprisingly just goes to .foo and the .opd information is unused.
3754 If the function definition is in a shared library, things are a little
3755 different: The call goes via a plt call stub, the opd information gets
3756 copied to the plt, and the linker patches the nop.
3757
3758 . x:
3759 . bl .foo_stub
3760 . ld 2,40(1)
3761 .
3762 .
3763 . .foo_stub:
3764 . std 2,40(1) # in practice, the call stub
3765 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3766 . addi 11,11,Lfoo@toc@l # this is the general idea
3767 . ld 12,0(11)
3768 . ld 2,8(11)
3769 . mtctr 12
3770 . ld 11,16(11)
3771 . bctr
3772 .
3773 . .section .plt
3774 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3775
3776 The "reloc ()" notation is supposed to indicate that the linker emits
3777 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3778 copying.
3779
3780 What are the difficulties here? Well, firstly, the relocations
3781 examined by the linker in check_relocs are against the function code
3782 sym .foo, while the dynamic relocation in the plt is emitted against
3783 the function descriptor symbol, foo. Somewhere along the line, we need
3784 to carefully copy dynamic link information from one symbol to the other.
3785 Secondly, the generic part of the elf linker will make .foo a dynamic
3786 symbol as is normal for most other backends. We need foo dynamic
3787 instead, at least for an application final link. However, when
3788 creating a shared library containing foo, we need to have both symbols
3789 dynamic so that references to .foo are satisfied during the early
3790 stages of linking. Otherwise the linker might decide to pull in a
3791 definition from some other object, eg. a static library.
3792
3793 Update: As of August 2004, we support a new convention. Function
3794 calls may use the function descriptor symbol, ie. "bl foo". This
3795 behaves exactly as "bl .foo". */
3796
3797 /* Of those relocs that might be copied as dynamic relocs, this
3798 function selects those that must be copied when linking a shared
3799 library or PIE, even when the symbol is local. */
3800
3801 static int
3802 must_be_dyn_reloc (struct bfd_link_info *info,
3803 enum elf_ppc64_reloc_type r_type)
3804 {
3805 switch (r_type)
3806 {
3807 default:
3808 /* Only relative relocs can be resolved when the object load
3809 address isn't fixed. DTPREL64 is excluded because the
3810 dynamic linker needs to differentiate global dynamic from
3811 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3812 return 1;
3813
3814 case R_PPC64_REL32:
3815 case R_PPC64_REL64:
3816 case R_PPC64_REL30:
3817 return 0;
3818
3819 case R_PPC64_TPREL16:
3820 case R_PPC64_TPREL16_LO:
3821 case R_PPC64_TPREL16_HI:
3822 case R_PPC64_TPREL16_HA:
3823 case R_PPC64_TPREL16_DS:
3824 case R_PPC64_TPREL16_LO_DS:
3825 case R_PPC64_TPREL16_HIGH:
3826 case R_PPC64_TPREL16_HIGHA:
3827 case R_PPC64_TPREL16_HIGHER:
3828 case R_PPC64_TPREL16_HIGHERA:
3829 case R_PPC64_TPREL16_HIGHEST:
3830 case R_PPC64_TPREL16_HIGHESTA:
3831 case R_PPC64_TPREL64:
3832 /* These relocations are relative but in a shared library the
3833 linker doesn't know the thread pointer base. */
3834 return bfd_link_dll (info);
3835 }
3836 }
3837
3838 /* Whether an undefined weak symbol should resolve to its link-time
3839 value, even in PIC or PIE objects. */
3840 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3841 ((H)->root.type == bfd_link_hash_undefweak \
3842 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3843 || (INFO)->dynamic_undefined_weak == 0))
3844
3845 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3846 copying dynamic variables from a shared lib into an app's dynbss
3847 section, and instead use a dynamic relocation to point into the
3848 shared lib. With code that gcc generates, it's vital that this be
3849 enabled; In the PowerPC64 ABI, the address of a function is actually
3850 the address of a function descriptor, which resides in the .opd
3851 section. gcc uses the descriptor directly rather than going via the
3852 GOT as some other ABI's do, which means that initialized function
3853 pointers must reference the descriptor. Thus, a function pointer
3854 initialized to the address of a function in a shared library will
3855 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3856 redefines the function descriptor symbol to point to the copy. This
3857 presents a problem as a plt entry for that function is also
3858 initialized from the function descriptor symbol and the copy reloc
3859 may not be initialized first. */
3860 #define ELIMINATE_COPY_RELOCS 1
3861
3862 /* Section name for stubs is the associated section name plus this
3863 string. */
3864 #define STUB_SUFFIX ".stub"
3865
3866 /* Linker stubs.
3867 ppc_stub_long_branch:
3868 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3869 destination, but a 24 bit branch in a stub section will reach.
3870 . b dest
3871
3872 ppc_stub_plt_branch:
3873 Similar to the above, but a 24 bit branch in the stub section won't
3874 reach its destination.
3875 . addis %r11,%r2,xxx@toc@ha
3876 . ld %r12,xxx@toc@l(%r11)
3877 . mtctr %r12
3878 . bctr
3879
3880 ppc_stub_plt_call:
3881 Used to call a function in a shared library. If it so happens that
3882 the plt entry referenced crosses a 64k boundary, then an extra
3883 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3884 . std %r2,40(%r1)
3885 . addis %r11,%r2,xxx@toc@ha
3886 . ld %r12,xxx+0@toc@l(%r11)
3887 . mtctr %r12
3888 . ld %r2,xxx+8@toc@l(%r11)
3889 . ld %r11,xxx+16@toc@l(%r11)
3890 . bctr
3891
3892 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3893 code to adjust the value and save r2 to support multiple toc sections.
3894 A ppc_stub_long_branch with an r2 offset looks like:
3895 . std %r2,40(%r1)
3896 . addis %r2,%r2,off@ha
3897 . addi %r2,%r2,off@l
3898 . b dest
3899
3900 A ppc_stub_plt_branch with an r2 offset looks like:
3901 . std %r2,40(%r1)
3902 . addis %r11,%r2,xxx@toc@ha
3903 . ld %r12,xxx@toc@l(%r11)
3904 . addis %r2,%r2,off@ha
3905 . addi %r2,%r2,off@l
3906 . mtctr %r12
3907 . bctr
3908
3909 In cases where the "addis" instruction would add zero, the "addis" is
3910 omitted and following instructions modified slightly in some cases.
3911 */
3912
3913 enum ppc_stub_type {
3914 ppc_stub_none,
3915 ppc_stub_long_branch,
3916 ppc_stub_long_branch_r2off,
3917 ppc_stub_plt_branch,
3918 ppc_stub_plt_branch_r2off,
3919 ppc_stub_plt_call,
3920 ppc_stub_plt_call_r2save,
3921 ppc_stub_global_entry,
3922 ppc_stub_save_res
3923 };
3924
3925 /* Information on stub grouping. */
3926 struct map_stub
3927 {
3928 /* The stub section. */
3929 asection *stub_sec;
3930 /* This is the section to which stubs in the group will be attached. */
3931 asection *link_sec;
3932 /* Next group. */
3933 struct map_stub *next;
3934 /* Whether to emit a copy of register save/restore functions in this
3935 group. */
3936 int needs_save_res;
3937 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3938 or -1u if no such stub with bctrl exists. */
3939 unsigned int tls_get_addr_opt_bctrl;
3940 };
3941
3942 struct ppc_stub_hash_entry {
3943
3944 /* Base hash table entry structure. */
3945 struct bfd_hash_entry root;
3946
3947 enum ppc_stub_type stub_type;
3948
3949 /* Group information. */
3950 struct map_stub *group;
3951
3952 /* Offset within stub_sec of the beginning of this stub. */
3953 bfd_vma stub_offset;
3954
3955 /* Given the symbol's value and its section we can determine its final
3956 value when building the stubs (so the stub knows where to jump. */
3957 bfd_vma target_value;
3958 asection *target_section;
3959
3960 /* The symbol table entry, if any, that this was derived from. */
3961 struct ppc_link_hash_entry *h;
3962 struct plt_entry *plt_ent;
3963
3964 /* Symbol st_other. */
3965 unsigned char other;
3966 };
3967
3968 struct ppc_branch_hash_entry {
3969
3970 /* Base hash table entry structure. */
3971 struct bfd_hash_entry root;
3972
3973 /* Offset within branch lookup table. */
3974 unsigned int offset;
3975
3976 /* Generation marker. */
3977 unsigned int iter;
3978 };
3979
3980 /* Used to track dynamic relocations for local symbols. */
3981 struct ppc_dyn_relocs
3982 {
3983 struct ppc_dyn_relocs *next;
3984
3985 /* The input section of the reloc. */
3986 asection *sec;
3987
3988 /* Total number of relocs copied for the input section. */
3989 unsigned int count : 31;
3990
3991 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3992 unsigned int ifunc : 1;
3993 };
3994
3995 struct ppc_link_hash_entry
3996 {
3997 struct elf_link_hash_entry elf;
3998
3999 union {
4000 /* A pointer to the most recently used stub hash entry against this
4001 symbol. */
4002 struct ppc_stub_hash_entry *stub_cache;
4003
4004 /* A pointer to the next symbol starting with a '.' */
4005 struct ppc_link_hash_entry *next_dot_sym;
4006 } u;
4007
4008 /* Track dynamic relocs copied for this symbol. */
4009 struct elf_dyn_relocs *dyn_relocs;
4010
4011 /* Chain of aliases referring to a weakdef. */
4012 struct ppc_link_hash_entry *weakref;
4013
4014 /* Link between function code and descriptor symbols. */
4015 struct ppc_link_hash_entry *oh;
4016
4017 /* Flag function code and descriptor symbols. */
4018 unsigned int is_func:1;
4019 unsigned int is_func_descriptor:1;
4020 unsigned int fake:1;
4021
4022 /* Whether global opd/toc sym has been adjusted or not.
4023 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4024 should be set for all globals defined in any opd/toc section. */
4025 unsigned int adjust_done:1;
4026
4027 /* Set if this is an out-of-line register save/restore function,
4028 with non-standard calling convention. */
4029 unsigned int save_res:1;
4030
4031 /* Set if a duplicate symbol with non-zero localentry is detected,
4032 even when the duplicate symbol does not provide a definition. */
4033 unsigned int non_zero_localentry:1;
4034
4035 /* Contexts in which symbol is used in the GOT (or TOC).
4036 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4037 corresponding relocs are encountered during check_relocs.
4038 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4039 indicate the corresponding GOT entry type is not needed.
4040 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4041 a TPREL one. We use a separate flag rather than setting TPREL
4042 just for convenience in distinguishing the two cases. */
4043 #define TLS_GD 1 /* GD reloc. */
4044 #define TLS_LD 2 /* LD reloc. */
4045 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4046 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4047 #define TLS_TLS 16 /* Any TLS reloc. */
4048 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4049 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4050 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4051 unsigned char tls_mask;
4052 };
4053
4054 /* ppc64 ELF linker hash table. */
4055
4056 struct ppc_link_hash_table
4057 {
4058 struct elf_link_hash_table elf;
4059
4060 /* The stub hash table. */
4061 struct bfd_hash_table stub_hash_table;
4062
4063 /* Another hash table for plt_branch stubs. */
4064 struct bfd_hash_table branch_hash_table;
4065
4066 /* Hash table for function prologue tocsave. */
4067 htab_t tocsave_htab;
4068
4069 /* Various options and other info passed from the linker. */
4070 struct ppc64_elf_params *params;
4071
4072 /* The size of sec_info below. */
4073 unsigned int sec_info_arr_size;
4074
4075 /* Per-section array of extra section info. Done this way rather
4076 than as part of ppc64_elf_section_data so we have the info for
4077 non-ppc64 sections. */
4078 struct
4079 {
4080 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4081 bfd_vma toc_off;
4082
4083 union
4084 {
4085 /* The section group that this section belongs to. */
4086 struct map_stub *group;
4087 /* A temp section list pointer. */
4088 asection *list;
4089 } u;
4090 } *sec_info;
4091
4092 /* Linked list of groups. */
4093 struct map_stub *group;
4094
4095 /* Temp used when calculating TOC pointers. */
4096 bfd_vma toc_curr;
4097 bfd *toc_bfd;
4098 asection *toc_first_sec;
4099
4100 /* Used when adding symbols. */
4101 struct ppc_link_hash_entry *dot_syms;
4102
4103 /* Shortcuts to get to dynamic linker sections. */
4104 asection *glink;
4105 asection *sfpr;
4106 asection *brlt;
4107 asection *relbrlt;
4108 asection *glink_eh_frame;
4109
4110 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4111 struct ppc_link_hash_entry *tls_get_addr;
4112 struct ppc_link_hash_entry *tls_get_addr_fd;
4113
4114 /* The size of reliplt used by got entry relocs. */
4115 bfd_size_type got_reli_size;
4116
4117 /* Statistics. */
4118 unsigned long stub_count[ppc_stub_global_entry];
4119
4120 /* Number of stubs against global syms. */
4121 unsigned long stub_globals;
4122
4123 /* Set if we're linking code with function descriptors. */
4124 unsigned int opd_abi:1;
4125
4126 /* Support for multiple toc sections. */
4127 unsigned int do_multi_toc:1;
4128 unsigned int multi_toc_needed:1;
4129 unsigned int second_toc_pass:1;
4130 unsigned int do_toc_opt:1;
4131
4132 /* Set if tls optimization is enabled. */
4133 unsigned int do_tls_opt:1;
4134
4135 /* Set on error. */
4136 unsigned int stub_error:1;
4137
4138 /* Whether func_desc_adjust needs to be run over symbols. */
4139 unsigned int need_func_desc_adj:1;
4140
4141 /* Whether there exist local gnu indirect function resolvers,
4142 referenced by dynamic relocations. */
4143 unsigned int local_ifunc_resolver:1;
4144 unsigned int maybe_local_ifunc_resolver:1;
4145
4146 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4147 unsigned int has_plt_localentry0:1;
4148
4149 /* Incremented every time we size stubs. */
4150 unsigned int stub_iteration;
4151
4152 /* Small local sym cache. */
4153 struct sym_cache sym_cache;
4154 };
4155
4156 /* Rename some of the generic section flags to better document how they
4157 are used here. */
4158
4159 /* Nonzero if this section has TLS related relocations. */
4160 #define has_tls_reloc sec_flg0
4161
4162 /* Nonzero if this section has a call to __tls_get_addr. */
4163 #define has_tls_get_addr_call sec_flg1
4164
4165 /* Nonzero if this section has any toc or got relocs. */
4166 #define has_toc_reloc sec_flg2
4167
4168 /* Nonzero if this section has a call to another section that uses
4169 the toc or got. */
4170 #define makes_toc_func_call sec_flg3
4171
4172 /* Recursion protection when determining above flag. */
4173 #define call_check_in_progress sec_flg4
4174 #define call_check_done sec_flg5
4175
4176 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4177
4178 #define ppc_hash_table(p) \
4179 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4180 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4181
4182 #define ppc_stub_hash_lookup(table, string, create, copy) \
4183 ((struct ppc_stub_hash_entry *) \
4184 bfd_hash_lookup ((table), (string), (create), (copy)))
4185
4186 #define ppc_branch_hash_lookup(table, string, create, copy) \
4187 ((struct ppc_branch_hash_entry *) \
4188 bfd_hash_lookup ((table), (string), (create), (copy)))
4189
4190 /* Create an entry in the stub hash table. */
4191
4192 static struct bfd_hash_entry *
4193 stub_hash_newfunc (struct bfd_hash_entry *entry,
4194 struct bfd_hash_table *table,
4195 const char *string)
4196 {
4197 /* Allocate the structure if it has not already been allocated by a
4198 subclass. */
4199 if (entry == NULL)
4200 {
4201 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4202 if (entry == NULL)
4203 return entry;
4204 }
4205
4206 /* Call the allocation method of the superclass. */
4207 entry = bfd_hash_newfunc (entry, table, string);
4208 if (entry != NULL)
4209 {
4210 struct ppc_stub_hash_entry *eh;
4211
4212 /* Initialize the local fields. */
4213 eh = (struct ppc_stub_hash_entry *) entry;
4214 eh->stub_type = ppc_stub_none;
4215 eh->group = NULL;
4216 eh->stub_offset = 0;
4217 eh->target_value = 0;
4218 eh->target_section = NULL;
4219 eh->h = NULL;
4220 eh->plt_ent = NULL;
4221 eh->other = 0;
4222 }
4223
4224 return entry;
4225 }
4226
4227 /* Create an entry in the branch hash table. */
4228
4229 static struct bfd_hash_entry *
4230 branch_hash_newfunc (struct bfd_hash_entry *entry,
4231 struct bfd_hash_table *table,
4232 const char *string)
4233 {
4234 /* Allocate the structure if it has not already been allocated by a
4235 subclass. */
4236 if (entry == NULL)
4237 {
4238 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4239 if (entry == NULL)
4240 return entry;
4241 }
4242
4243 /* Call the allocation method of the superclass. */
4244 entry = bfd_hash_newfunc (entry, table, string);
4245 if (entry != NULL)
4246 {
4247 struct ppc_branch_hash_entry *eh;
4248
4249 /* Initialize the local fields. */
4250 eh = (struct ppc_branch_hash_entry *) entry;
4251 eh->offset = 0;
4252 eh->iter = 0;
4253 }
4254
4255 return entry;
4256 }
4257
4258 /* Create an entry in a ppc64 ELF linker hash table. */
4259
4260 static struct bfd_hash_entry *
4261 link_hash_newfunc (struct bfd_hash_entry *entry,
4262 struct bfd_hash_table *table,
4263 const char *string)
4264 {
4265 /* Allocate the structure if it has not already been allocated by a
4266 subclass. */
4267 if (entry == NULL)
4268 {
4269 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4270 if (entry == NULL)
4271 return entry;
4272 }
4273
4274 /* Call the allocation method of the superclass. */
4275 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4276 if (entry != NULL)
4277 {
4278 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4279
4280 memset (&eh->u.stub_cache, 0,
4281 (sizeof (struct ppc_link_hash_entry)
4282 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4283
4284 /* When making function calls, old ABI code references function entry
4285 points (dot symbols), while new ABI code references the function
4286 descriptor symbol. We need to make any combination of reference and
4287 definition work together, without breaking archive linking.
4288
4289 For a defined function "foo" and an undefined call to "bar":
4290 An old object defines "foo" and ".foo", references ".bar" (possibly
4291 "bar" too).
4292 A new object defines "foo" and references "bar".
4293
4294 A new object thus has no problem with its undefined symbols being
4295 satisfied by definitions in an old object. On the other hand, the
4296 old object won't have ".bar" satisfied by a new object.
4297
4298 Keep a list of newly added dot-symbols. */
4299
4300 if (string[0] == '.')
4301 {
4302 struct ppc_link_hash_table *htab;
4303
4304 htab = (struct ppc_link_hash_table *) table;
4305 eh->u.next_dot_sym = htab->dot_syms;
4306 htab->dot_syms = eh;
4307 }
4308 }
4309
4310 return entry;
4311 }
4312
4313 struct tocsave_entry {
4314 asection *sec;
4315 bfd_vma offset;
4316 };
4317
4318 static hashval_t
4319 tocsave_htab_hash (const void *p)
4320 {
4321 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4322 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4323 }
4324
4325 static int
4326 tocsave_htab_eq (const void *p1, const void *p2)
4327 {
4328 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4329 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4330 return e1->sec == e2->sec && e1->offset == e2->offset;
4331 }
4332
4333 /* Destroy a ppc64 ELF linker hash table. */
4334
4335 static void
4336 ppc64_elf_link_hash_table_free (bfd *obfd)
4337 {
4338 struct ppc_link_hash_table *htab;
4339
4340 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4341 if (htab->tocsave_htab)
4342 htab_delete (htab->tocsave_htab);
4343 bfd_hash_table_free (&htab->branch_hash_table);
4344 bfd_hash_table_free (&htab->stub_hash_table);
4345 _bfd_elf_link_hash_table_free (obfd);
4346 }
4347
4348 /* Create a ppc64 ELF linker hash table. */
4349
4350 static struct bfd_link_hash_table *
4351 ppc64_elf_link_hash_table_create (bfd *abfd)
4352 {
4353 struct ppc_link_hash_table *htab;
4354 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4355
4356 htab = bfd_zmalloc (amt);
4357 if (htab == NULL)
4358 return NULL;
4359
4360 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4361 sizeof (struct ppc_link_hash_entry),
4362 PPC64_ELF_DATA))
4363 {
4364 free (htab);
4365 return NULL;
4366 }
4367
4368 /* Init the stub hash table too. */
4369 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4370 sizeof (struct ppc_stub_hash_entry)))
4371 {
4372 _bfd_elf_link_hash_table_free (abfd);
4373 return NULL;
4374 }
4375
4376 /* And the branch hash table. */
4377 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4378 sizeof (struct ppc_branch_hash_entry)))
4379 {
4380 bfd_hash_table_free (&htab->stub_hash_table);
4381 _bfd_elf_link_hash_table_free (abfd);
4382 return NULL;
4383 }
4384
4385 htab->tocsave_htab = htab_try_create (1024,
4386 tocsave_htab_hash,
4387 tocsave_htab_eq,
4388 NULL);
4389 if (htab->tocsave_htab == NULL)
4390 {
4391 ppc64_elf_link_hash_table_free (abfd);
4392 return NULL;
4393 }
4394 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4395
4396 /* Initializing two fields of the union is just cosmetic. We really
4397 only care about glist, but when compiled on a 32-bit host the
4398 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4399 debugger inspection of these fields look nicer. */
4400 htab->elf.init_got_refcount.refcount = 0;
4401 htab->elf.init_got_refcount.glist = NULL;
4402 htab->elf.init_plt_refcount.refcount = 0;
4403 htab->elf.init_plt_refcount.glist = NULL;
4404 htab->elf.init_got_offset.offset = 0;
4405 htab->elf.init_got_offset.glist = NULL;
4406 htab->elf.init_plt_offset.offset = 0;
4407 htab->elf.init_plt_offset.glist = NULL;
4408
4409 return &htab->elf.root;
4410 }
4411
4412 /* Create sections for linker generated code. */
4413
4414 static bfd_boolean
4415 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4416 {
4417 struct ppc_link_hash_table *htab;
4418 flagword flags;
4419
4420 htab = ppc_hash_table (info);
4421
4422 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4423 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4424 if (htab->params->save_restore_funcs)
4425 {
4426 /* Create .sfpr for code to save and restore fp regs. */
4427 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4428 flags);
4429 if (htab->sfpr == NULL
4430 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4431 return FALSE;
4432 }
4433
4434 if (bfd_link_relocatable (info))
4435 return TRUE;
4436
4437 /* Create .glink for lazy dynamic linking support. */
4438 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4439 flags);
4440 if (htab->glink == NULL
4441 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4442 return FALSE;
4443
4444 if (!info->no_ld_generated_unwind_info)
4445 {
4446 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4447 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4448 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4449 ".eh_frame",
4450 flags);
4451 if (htab->glink_eh_frame == NULL
4452 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4453 return FALSE;
4454 }
4455
4456 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4457 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4458 if (htab->elf.iplt == NULL
4459 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4460 return FALSE;
4461
4462 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4463 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4464 htab->elf.irelplt
4465 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4466 if (htab->elf.irelplt == NULL
4467 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4468 return FALSE;
4469
4470 /* Create branch lookup table for plt_branch stubs. */
4471 flags = (SEC_ALLOC | SEC_LOAD
4472 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4473 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4474 flags);
4475 if (htab->brlt == NULL
4476 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4477 return FALSE;
4478
4479 if (!bfd_link_pic (info))
4480 return TRUE;
4481
4482 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4483 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4484 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4485 ".rela.branch_lt",
4486 flags);
4487 if (htab->relbrlt == NULL
4488 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4489 return FALSE;
4490
4491 return TRUE;
4492 }
4493
4494 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4495
4496 bfd_boolean
4497 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4498 struct ppc64_elf_params *params)
4499 {
4500 struct ppc_link_hash_table *htab;
4501
4502 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4503
4504 /* Always hook our dynamic sections into the first bfd, which is the
4505 linker created stub bfd. This ensures that the GOT header is at
4506 the start of the output TOC section. */
4507 htab = ppc_hash_table (info);
4508 htab->elf.dynobj = params->stub_bfd;
4509 htab->params = params;
4510
4511 return create_linkage_sections (htab->elf.dynobj, info);
4512 }
4513
4514 /* Build a name for an entry in the stub hash table. */
4515
4516 static char *
4517 ppc_stub_name (const asection *input_section,
4518 const asection *sym_sec,
4519 const struct ppc_link_hash_entry *h,
4520 const Elf_Internal_Rela *rel)
4521 {
4522 char *stub_name;
4523 ssize_t len;
4524
4525 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4526 offsets from a sym as a branch target? In fact, we could
4527 probably assume the addend is always zero. */
4528 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4529
4530 if (h)
4531 {
4532 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4533 stub_name = bfd_malloc (len);
4534 if (stub_name == NULL)
4535 return stub_name;
4536
4537 len = sprintf (stub_name, "%08x.%s+%x",
4538 input_section->id & 0xffffffff,
4539 h->elf.root.root.string,
4540 (int) rel->r_addend & 0xffffffff);
4541 }
4542 else
4543 {
4544 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4545 stub_name = bfd_malloc (len);
4546 if (stub_name == NULL)
4547 return stub_name;
4548
4549 len = sprintf (stub_name, "%08x.%x:%x+%x",
4550 input_section->id & 0xffffffff,
4551 sym_sec->id & 0xffffffff,
4552 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4553 (int) rel->r_addend & 0xffffffff);
4554 }
4555 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4556 stub_name[len - 2] = 0;
4557 return stub_name;
4558 }
4559
4560 /* Look up an entry in the stub hash. Stub entries are cached because
4561 creating the stub name takes a bit of time. */
4562
4563 static struct ppc_stub_hash_entry *
4564 ppc_get_stub_entry (const asection *input_section,
4565 const asection *sym_sec,
4566 struct ppc_link_hash_entry *h,
4567 const Elf_Internal_Rela *rel,
4568 struct ppc_link_hash_table *htab)
4569 {
4570 struct ppc_stub_hash_entry *stub_entry;
4571 struct map_stub *group;
4572
4573 /* If this input section is part of a group of sections sharing one
4574 stub section, then use the id of the first section in the group.
4575 Stub names need to include a section id, as there may well be
4576 more than one stub used to reach say, printf, and we need to
4577 distinguish between them. */
4578 group = htab->sec_info[input_section->id].u.group;
4579 if (group == NULL)
4580 return NULL;
4581
4582 if (h != NULL && h->u.stub_cache != NULL
4583 && h->u.stub_cache->h == h
4584 && h->u.stub_cache->group == group)
4585 {
4586 stub_entry = h->u.stub_cache;
4587 }
4588 else
4589 {
4590 char *stub_name;
4591
4592 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4593 if (stub_name == NULL)
4594 return NULL;
4595
4596 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4597 stub_name, FALSE, FALSE);
4598 if (h != NULL)
4599 h->u.stub_cache = stub_entry;
4600
4601 free (stub_name);
4602 }
4603
4604 return stub_entry;
4605 }
4606
4607 /* Add a new stub entry to the stub hash. Not all fields of the new
4608 stub entry are initialised. */
4609
4610 static struct ppc_stub_hash_entry *
4611 ppc_add_stub (const char *stub_name,
4612 asection *section,
4613 struct bfd_link_info *info)
4614 {
4615 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4616 struct map_stub *group;
4617 asection *link_sec;
4618 asection *stub_sec;
4619 struct ppc_stub_hash_entry *stub_entry;
4620
4621 group = htab->sec_info[section->id].u.group;
4622 link_sec = group->link_sec;
4623 stub_sec = group->stub_sec;
4624 if (stub_sec == NULL)
4625 {
4626 size_t namelen;
4627 bfd_size_type len;
4628 char *s_name;
4629
4630 namelen = strlen (link_sec->name);
4631 len = namelen + sizeof (STUB_SUFFIX);
4632 s_name = bfd_alloc (htab->params->stub_bfd, len);
4633 if (s_name == NULL)
4634 return NULL;
4635
4636 memcpy (s_name, link_sec->name, namelen);
4637 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4638 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4639 if (stub_sec == NULL)
4640 return NULL;
4641 group->stub_sec = stub_sec;
4642 }
4643
4644 /* Enter this entry into the linker stub hash table. */
4645 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4646 TRUE, FALSE);
4647 if (stub_entry == NULL)
4648 {
4649 /* xgettext:c-format */
4650 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4651 section->owner, stub_name);
4652 return NULL;
4653 }
4654
4655 stub_entry->group = group;
4656 stub_entry->stub_offset = 0;
4657 return stub_entry;
4658 }
4659
4660 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4661 not already done. */
4662
4663 static bfd_boolean
4664 create_got_section (bfd *abfd, struct bfd_link_info *info)
4665 {
4666 asection *got, *relgot;
4667 flagword flags;
4668 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4669
4670 if (!is_ppc64_elf (abfd))
4671 return FALSE;
4672 if (htab == NULL)
4673 return FALSE;
4674
4675 if (!htab->elf.sgot
4676 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4677 return FALSE;
4678
4679 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4680 | SEC_LINKER_CREATED);
4681
4682 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4683 if (!got
4684 || !bfd_set_section_alignment (abfd, got, 3))
4685 return FALSE;
4686
4687 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4688 flags | SEC_READONLY);
4689 if (!relgot
4690 || ! bfd_set_section_alignment (abfd, relgot, 3))
4691 return FALSE;
4692
4693 ppc64_elf_tdata (abfd)->got = got;
4694 ppc64_elf_tdata (abfd)->relgot = relgot;
4695 return TRUE;
4696 }
4697
4698 /* Follow indirect and warning symbol links. */
4699
4700 static inline struct bfd_link_hash_entry *
4701 follow_link (struct bfd_link_hash_entry *h)
4702 {
4703 while (h->type == bfd_link_hash_indirect
4704 || h->type == bfd_link_hash_warning)
4705 h = h->u.i.link;
4706 return h;
4707 }
4708
4709 static inline struct elf_link_hash_entry *
4710 elf_follow_link (struct elf_link_hash_entry *h)
4711 {
4712 return (struct elf_link_hash_entry *) follow_link (&h->root);
4713 }
4714
4715 static inline struct ppc_link_hash_entry *
4716 ppc_follow_link (struct ppc_link_hash_entry *h)
4717 {
4718 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4719 }
4720
4721 /* Merge PLT info on FROM with that on TO. */
4722
4723 static void
4724 move_plt_plist (struct ppc_link_hash_entry *from,
4725 struct ppc_link_hash_entry *to)
4726 {
4727 if (from->elf.plt.plist != NULL)
4728 {
4729 if (to->elf.plt.plist != NULL)
4730 {
4731 struct plt_entry **entp;
4732 struct plt_entry *ent;
4733
4734 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4735 {
4736 struct plt_entry *dent;
4737
4738 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4739 if (dent->addend == ent->addend)
4740 {
4741 dent->plt.refcount += ent->plt.refcount;
4742 *entp = ent->next;
4743 break;
4744 }
4745 if (dent == NULL)
4746 entp = &ent->next;
4747 }
4748 *entp = to->elf.plt.plist;
4749 }
4750
4751 to->elf.plt.plist = from->elf.plt.plist;
4752 from->elf.plt.plist = NULL;
4753 }
4754 }
4755
4756 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4757
4758 static void
4759 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4760 struct elf_link_hash_entry *dir,
4761 struct elf_link_hash_entry *ind)
4762 {
4763 struct ppc_link_hash_entry *edir, *eind;
4764
4765 edir = (struct ppc_link_hash_entry *) dir;
4766 eind = (struct ppc_link_hash_entry *) ind;
4767
4768 edir->is_func |= eind->is_func;
4769 edir->is_func_descriptor |= eind->is_func_descriptor;
4770 edir->tls_mask |= eind->tls_mask;
4771 if (eind->oh != NULL)
4772 edir->oh = ppc_follow_link (eind->oh);
4773
4774 /* If called to transfer flags for a weakdef during processing
4775 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4776 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4777 if (!(ELIMINATE_COPY_RELOCS
4778 && eind->elf.root.type != bfd_link_hash_indirect
4779 && edir->elf.dynamic_adjusted))
4780 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4781
4782 if (edir->elf.versioned != versioned_hidden)
4783 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4784 edir->elf.ref_regular |= eind->elf.ref_regular;
4785 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4786 edir->elf.needs_plt |= eind->elf.needs_plt;
4787 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4788
4789 /* If we were called to copy over info for a weak sym, don't copy
4790 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4791 in order to simplify readonly_dynrelocs and save a field in the
4792 symbol hash entry, but that means dyn_relocs can't be used in any
4793 tests about a specific symbol, or affect other symbol flags which
4794 are then tested.
4795 Chain weakdefs so we can get from the weakdef back to an alias.
4796 The list is circular so that we don't need to use u.weakdef as
4797 well as this list to look at all aliases. */
4798 if (eind->elf.root.type != bfd_link_hash_indirect)
4799 {
4800 struct ppc_link_hash_entry *cur, *add, *next;
4801
4802 add = eind;
4803 do
4804 {
4805 cur = edir->weakref;
4806 if (cur != NULL)
4807 {
4808 do
4809 {
4810 /* We can be called twice for the same symbols.
4811 Don't make multiple loops. */
4812 if (cur == add)
4813 return;
4814 cur = cur->weakref;
4815 } while (cur != edir);
4816 }
4817 next = add->weakref;
4818 if (cur != add)
4819 {
4820 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4821 edir->weakref = add;
4822 }
4823 add = next;
4824 } while (add != NULL && add != eind);
4825 return;
4826 }
4827
4828 /* Copy over any dynamic relocs we may have on the indirect sym. */
4829 if (eind->dyn_relocs != NULL)
4830 {
4831 if (edir->dyn_relocs != NULL)
4832 {
4833 struct elf_dyn_relocs **pp;
4834 struct elf_dyn_relocs *p;
4835
4836 /* Add reloc counts against the indirect sym to the direct sym
4837 list. Merge any entries against the same section. */
4838 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4839 {
4840 struct elf_dyn_relocs *q;
4841
4842 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4843 if (q->sec == p->sec)
4844 {
4845 q->pc_count += p->pc_count;
4846 q->count += p->count;
4847 *pp = p->next;
4848 break;
4849 }
4850 if (q == NULL)
4851 pp = &p->next;
4852 }
4853 *pp = edir->dyn_relocs;
4854 }
4855
4856 edir->dyn_relocs = eind->dyn_relocs;
4857 eind->dyn_relocs = NULL;
4858 }
4859
4860 /* Copy over got entries that we may have already seen to the
4861 symbol which just became indirect. */
4862 if (eind->elf.got.glist != NULL)
4863 {
4864 if (edir->elf.got.glist != NULL)
4865 {
4866 struct got_entry **entp;
4867 struct got_entry *ent;
4868
4869 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4870 {
4871 struct got_entry *dent;
4872
4873 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4874 if (dent->addend == ent->addend
4875 && dent->owner == ent->owner
4876 && dent->tls_type == ent->tls_type)
4877 {
4878 dent->got.refcount += ent->got.refcount;
4879 *entp = ent->next;
4880 break;
4881 }
4882 if (dent == NULL)
4883 entp = &ent->next;
4884 }
4885 *entp = edir->elf.got.glist;
4886 }
4887
4888 edir->elf.got.glist = eind->elf.got.glist;
4889 eind->elf.got.glist = NULL;
4890 }
4891
4892 /* And plt entries. */
4893 move_plt_plist (eind, edir);
4894
4895 if (eind->elf.dynindx != -1)
4896 {
4897 if (edir->elf.dynindx != -1)
4898 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4899 edir->elf.dynstr_index);
4900 edir->elf.dynindx = eind->elf.dynindx;
4901 edir->elf.dynstr_index = eind->elf.dynstr_index;
4902 eind->elf.dynindx = -1;
4903 eind->elf.dynstr_index = 0;
4904 }
4905 }
4906
4907 /* Find the function descriptor hash entry from the given function code
4908 hash entry FH. Link the entries via their OH fields. */
4909
4910 static struct ppc_link_hash_entry *
4911 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4912 {
4913 struct ppc_link_hash_entry *fdh = fh->oh;
4914
4915 if (fdh == NULL)
4916 {
4917 const char *fd_name = fh->elf.root.root.string + 1;
4918
4919 fdh = (struct ppc_link_hash_entry *)
4920 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4921 if (fdh == NULL)
4922 return fdh;
4923
4924 fdh->is_func_descriptor = 1;
4925 fdh->oh = fh;
4926 fh->is_func = 1;
4927 fh->oh = fdh;
4928 }
4929
4930 fdh = ppc_follow_link (fdh);
4931 fdh->is_func_descriptor = 1;
4932 fdh->oh = fh;
4933 return fdh;
4934 }
4935
4936 /* Make a fake function descriptor sym for the undefined code sym FH. */
4937
4938 static struct ppc_link_hash_entry *
4939 make_fdh (struct bfd_link_info *info,
4940 struct ppc_link_hash_entry *fh)
4941 {
4942 bfd *abfd = fh->elf.root.u.undef.abfd;
4943 struct bfd_link_hash_entry *bh = NULL;
4944 struct ppc_link_hash_entry *fdh;
4945 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4946 ? BSF_WEAK
4947 : BSF_GLOBAL);
4948
4949 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4950 fh->elf.root.root.string + 1,
4951 flags, bfd_und_section_ptr, 0,
4952 NULL, FALSE, FALSE, &bh))
4953 return NULL;
4954
4955 fdh = (struct ppc_link_hash_entry *) bh;
4956 fdh->elf.non_elf = 0;
4957 fdh->fake = 1;
4958 fdh->is_func_descriptor = 1;
4959 fdh->oh = fh;
4960 fh->is_func = 1;
4961 fh->oh = fdh;
4962 return fdh;
4963 }
4964
4965 /* Fix function descriptor symbols defined in .opd sections to be
4966 function type. */
4967
4968 static bfd_boolean
4969 ppc64_elf_add_symbol_hook (bfd *ibfd,
4970 struct bfd_link_info *info,
4971 Elf_Internal_Sym *isym,
4972 const char **name,
4973 flagword *flags ATTRIBUTE_UNUSED,
4974 asection **sec,
4975 bfd_vma *value)
4976 {
4977 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4978 && (ibfd->flags & DYNAMIC) == 0
4979 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4980 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4981
4982 if (*sec != NULL
4983 && strcmp ((*sec)->name, ".opd") == 0)
4984 {
4985 asection *code_sec;
4986
4987 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4988 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4989 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4990
4991 /* If the symbol is a function defined in .opd, and the function
4992 code is in a discarded group, let it appear to be undefined. */
4993 if (!bfd_link_relocatable (info)
4994 && (*sec)->reloc_count != 0
4995 && opd_entry_value (*sec, *value, &code_sec, NULL,
4996 FALSE) != (bfd_vma) -1
4997 && discarded_section (code_sec))
4998 {
4999 *sec = bfd_und_section_ptr;
5000 isym->st_shndx = SHN_UNDEF;
5001 }
5002 }
5003 else if (*sec != NULL
5004 && strcmp ((*sec)->name, ".toc") == 0
5005 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
5006 {
5007 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5008 if (htab != NULL)
5009 htab->params->object_in_toc = 1;
5010 }
5011
5012 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5013 {
5014 if (abiversion (ibfd) == 0)
5015 set_abiversion (ibfd, 2);
5016 else if (abiversion (ibfd) == 1)
5017 {
5018 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5019 " for ABI version 1\n"), name);
5020 bfd_set_error (bfd_error_bad_value);
5021 return FALSE;
5022 }
5023 }
5024
5025 return TRUE;
5026 }
5027
5028 /* Merge non-visibility st_other attributes: local entry point. */
5029
5030 static void
5031 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5032 const Elf_Internal_Sym *isym,
5033 bfd_boolean definition,
5034 bfd_boolean dynamic)
5035 {
5036 if (definition && (!dynamic || !h->def_regular))
5037 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5038 | ELF_ST_VISIBILITY (h->other));
5039 }
5040
5041 /* Hook called on merging a symbol. We use this to clear "fake" since
5042 we now have a real symbol. */
5043
5044 static bfd_boolean
5045 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5046 const Elf_Internal_Sym *isym,
5047 asection **psec ATTRIBUTE_UNUSED,
5048 bfd_boolean newdef ATTRIBUTE_UNUSED,
5049 bfd_boolean olddef ATTRIBUTE_UNUSED,
5050 bfd *oldbfd ATTRIBUTE_UNUSED,
5051 const asection *oldsec ATTRIBUTE_UNUSED)
5052 {
5053 ((struct ppc_link_hash_entry *) h)->fake = 0;
5054 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5055 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5056 return TRUE;
5057 }
5058
5059 /* This function makes an old ABI object reference to ".bar" cause the
5060 inclusion of a new ABI object archive that defines "bar".
5061 NAME is a symbol defined in an archive. Return a symbol in the hash
5062 table that might be satisfied by the archive symbols. */
5063
5064 static struct elf_link_hash_entry *
5065 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5066 struct bfd_link_info *info,
5067 const char *name)
5068 {
5069 struct elf_link_hash_entry *h;
5070 char *dot_name;
5071 size_t len;
5072
5073 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5074 if (h != NULL
5075 /* Don't return this sym if it is a fake function descriptor
5076 created by add_symbol_adjust. */
5077 && !((struct ppc_link_hash_entry *) h)->fake)
5078 return h;
5079
5080 if (name[0] == '.')
5081 return h;
5082
5083 len = strlen (name);
5084 dot_name = bfd_alloc (abfd, len + 2);
5085 if (dot_name == NULL)
5086 return (struct elf_link_hash_entry *) 0 - 1;
5087 dot_name[0] = '.';
5088 memcpy (dot_name + 1, name, len + 1);
5089 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5090 bfd_release (abfd, dot_name);
5091 return h;
5092 }
5093
5094 /* This function satisfies all old ABI object references to ".bar" if a
5095 new ABI object defines "bar". Well, at least, undefined dot symbols
5096 are made weak. This stops later archive searches from including an
5097 object if we already have a function descriptor definition. It also
5098 prevents the linker complaining about undefined symbols.
5099 We also check and correct mismatched symbol visibility here. The
5100 most restrictive visibility of the function descriptor and the
5101 function entry symbol is used. */
5102
5103 static bfd_boolean
5104 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5105 {
5106 struct ppc_link_hash_table *htab;
5107 struct ppc_link_hash_entry *fdh;
5108
5109 if (eh->elf.root.type == bfd_link_hash_warning)
5110 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5111
5112 if (eh->elf.root.type == bfd_link_hash_indirect)
5113 return TRUE;
5114
5115 if (eh->elf.root.root.string[0] != '.')
5116 abort ();
5117
5118 htab = ppc_hash_table (info);
5119 if (htab == NULL)
5120 return FALSE;
5121
5122 fdh = lookup_fdh (eh, htab);
5123 if (fdh == NULL
5124 && !bfd_link_relocatable (info)
5125 && (eh->elf.root.type == bfd_link_hash_undefined
5126 || eh->elf.root.type == bfd_link_hash_undefweak)
5127 && eh->elf.ref_regular)
5128 {
5129 /* Make an undefined function descriptor sym, in order to
5130 pull in an --as-needed shared lib. Archives are handled
5131 elsewhere. */
5132 fdh = make_fdh (info, eh);
5133 if (fdh == NULL)
5134 return FALSE;
5135 }
5136
5137 if (fdh != NULL)
5138 {
5139 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5140 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5141
5142 /* Make both descriptor and entry symbol have the most
5143 constraining visibility of either symbol. */
5144 if (entry_vis < descr_vis)
5145 fdh->elf.other += entry_vis - descr_vis;
5146 else if (entry_vis > descr_vis)
5147 eh->elf.other += descr_vis - entry_vis;
5148
5149 /* Propagate reference flags from entry symbol to function
5150 descriptor symbol. */
5151 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5152 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5153 fdh->elf.ref_regular |= eh->elf.ref_regular;
5154 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5155
5156 if (!fdh->elf.forced_local
5157 && fdh->elf.dynindx == -1
5158 && fdh->elf.versioned != versioned_hidden
5159 && (bfd_link_dll (info)
5160 || fdh->elf.def_dynamic
5161 || fdh->elf.ref_dynamic)
5162 && (eh->elf.ref_regular
5163 || eh->elf.def_regular))
5164 {
5165 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5166 return FALSE;
5167 }
5168 }
5169
5170 return TRUE;
5171 }
5172
5173 /* Set up opd section info and abiversion for IBFD, and process list
5174 of dot-symbols we made in link_hash_newfunc. */
5175
5176 static bfd_boolean
5177 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5178 {
5179 struct ppc_link_hash_table *htab;
5180 struct ppc_link_hash_entry **p, *eh;
5181 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5182
5183 if (opd != NULL && opd->size != 0)
5184 {
5185 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5186 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5187
5188 if (abiversion (ibfd) == 0)
5189 set_abiversion (ibfd, 1);
5190 else if (abiversion (ibfd) >= 2)
5191 {
5192 /* xgettext:c-format */
5193 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5194 " version %d\n"),
5195 ibfd, abiversion (ibfd));
5196 bfd_set_error (bfd_error_bad_value);
5197 return FALSE;
5198 }
5199 }
5200
5201 if (is_ppc64_elf (info->output_bfd))
5202 {
5203 /* For input files without an explicit abiversion in e_flags
5204 we should have flagged any with symbol st_other bits set
5205 as ELFv1 and above flagged those with .opd as ELFv2.
5206 Set the output abiversion if not yet set, and for any input
5207 still ambiguous, take its abiversion from the output.
5208 Differences in ABI are reported later. */
5209 if (abiversion (info->output_bfd) == 0)
5210 set_abiversion (info->output_bfd, abiversion (ibfd));
5211 else if (abiversion (ibfd) == 0)
5212 set_abiversion (ibfd, abiversion (info->output_bfd));
5213 }
5214
5215 htab = ppc_hash_table (info);
5216 if (htab == NULL)
5217 return TRUE;
5218
5219 if (opd != NULL && opd->size != 0
5220 && (ibfd->flags & DYNAMIC) == 0
5221 && (opd->flags & SEC_RELOC) != 0
5222 && opd->reloc_count != 0
5223 && !bfd_is_abs_section (opd->output_section)
5224 && info->gc_sections)
5225 {
5226 /* Garbage collection needs some extra help with .opd sections.
5227 We don't want to necessarily keep everything referenced by
5228 relocs in .opd, as that would keep all functions. Instead,
5229 if we reference an .opd symbol (a function descriptor), we
5230 want to keep the function code symbol's section. This is
5231 easy for global symbols, but for local syms we need to keep
5232 information about the associated function section. */
5233 bfd_size_type amt;
5234 asection **opd_sym_map;
5235 Elf_Internal_Shdr *symtab_hdr;
5236 Elf_Internal_Rela *relocs, *rel_end, *rel;
5237
5238 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5239 opd_sym_map = bfd_zalloc (ibfd, amt);
5240 if (opd_sym_map == NULL)
5241 return FALSE;
5242 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5243 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5244 info->keep_memory);
5245 if (relocs == NULL)
5246 return FALSE;
5247 symtab_hdr = &elf_symtab_hdr (ibfd);
5248 rel_end = relocs + opd->reloc_count - 1;
5249 for (rel = relocs; rel < rel_end; rel++)
5250 {
5251 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5252 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5253
5254 if (r_type == R_PPC64_ADDR64
5255 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5256 && r_symndx < symtab_hdr->sh_info)
5257 {
5258 Elf_Internal_Sym *isym;
5259 asection *s;
5260
5261 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5262 if (isym == NULL)
5263 {
5264 if (elf_section_data (opd)->relocs != relocs)
5265 free (relocs);
5266 return FALSE;
5267 }
5268
5269 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5270 if (s != NULL && s != opd)
5271 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5272 }
5273 }
5274 if (elf_section_data (opd)->relocs != relocs)
5275 free (relocs);
5276 }
5277
5278 p = &htab->dot_syms;
5279 while ((eh = *p) != NULL)
5280 {
5281 *p = NULL;
5282 if (&eh->elf == htab->elf.hgot)
5283 ;
5284 else if (htab->elf.hgot == NULL
5285 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5286 htab->elf.hgot = &eh->elf;
5287 else if (abiversion (ibfd) <= 1)
5288 {
5289 htab->need_func_desc_adj = 1;
5290 if (!add_symbol_adjust (eh, info))
5291 return FALSE;
5292 }
5293 p = &eh->u.next_dot_sym;
5294 }
5295 return TRUE;
5296 }
5297
5298 /* Undo hash table changes when an --as-needed input file is determined
5299 not to be needed. */
5300
5301 static bfd_boolean
5302 ppc64_elf_notice_as_needed (bfd *ibfd,
5303 struct bfd_link_info *info,
5304 enum notice_asneeded_action act)
5305 {
5306 if (act == notice_not_needed)
5307 {
5308 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5309
5310 if (htab == NULL)
5311 return FALSE;
5312
5313 htab->dot_syms = NULL;
5314 }
5315 return _bfd_elf_notice_as_needed (ibfd, info, act);
5316 }
5317
5318 /* If --just-symbols against a final linked binary, then assume we need
5319 toc adjusting stubs when calling functions defined there. */
5320
5321 static void
5322 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5323 {
5324 if ((sec->flags & SEC_CODE) != 0
5325 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5326 && is_ppc64_elf (sec->owner))
5327 {
5328 if (abiversion (sec->owner) >= 2
5329 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5330 sec->has_toc_reloc = 1;
5331 }
5332 _bfd_elf_link_just_syms (sec, info);
5333 }
5334
5335 static struct plt_entry **
5336 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5337 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5338 {
5339 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5340 struct plt_entry **local_plt;
5341 unsigned char *local_got_tls_masks;
5342
5343 if (local_got_ents == NULL)
5344 {
5345 bfd_size_type size = symtab_hdr->sh_info;
5346
5347 size *= (sizeof (*local_got_ents)
5348 + sizeof (*local_plt)
5349 + sizeof (*local_got_tls_masks));
5350 local_got_ents = bfd_zalloc (abfd, size);
5351 if (local_got_ents == NULL)
5352 return NULL;
5353 elf_local_got_ents (abfd) = local_got_ents;
5354 }
5355
5356 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5357 {
5358 struct got_entry *ent;
5359
5360 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5361 if (ent->addend == r_addend
5362 && ent->owner == abfd
5363 && ent->tls_type == tls_type)
5364 break;
5365 if (ent == NULL)
5366 {
5367 bfd_size_type amt = sizeof (*ent);
5368 ent = bfd_alloc (abfd, amt);
5369 if (ent == NULL)
5370 return FALSE;
5371 ent->next = local_got_ents[r_symndx];
5372 ent->addend = r_addend;
5373 ent->owner = abfd;
5374 ent->tls_type = tls_type;
5375 ent->is_indirect = FALSE;
5376 ent->got.refcount = 0;
5377 local_got_ents[r_symndx] = ent;
5378 }
5379 ent->got.refcount += 1;
5380 }
5381
5382 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5383 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5384 local_got_tls_masks[r_symndx] |= tls_type;
5385
5386 return local_plt + r_symndx;
5387 }
5388
5389 static bfd_boolean
5390 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5391 {
5392 struct plt_entry *ent;
5393
5394 for (ent = *plist; ent != NULL; ent = ent->next)
5395 if (ent->addend == addend)
5396 break;
5397 if (ent == NULL)
5398 {
5399 bfd_size_type amt = sizeof (*ent);
5400 ent = bfd_alloc (abfd, amt);
5401 if (ent == NULL)
5402 return FALSE;
5403 ent->next = *plist;
5404 ent->addend = addend;
5405 ent->plt.refcount = 0;
5406 *plist = ent;
5407 }
5408 ent->plt.refcount += 1;
5409 return TRUE;
5410 }
5411
5412 static bfd_boolean
5413 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5414 {
5415 return (r_type == R_PPC64_REL24
5416 || r_type == R_PPC64_REL14
5417 || r_type == R_PPC64_REL14_BRTAKEN
5418 || r_type == R_PPC64_REL14_BRNTAKEN
5419 || r_type == R_PPC64_ADDR24
5420 || r_type == R_PPC64_ADDR14
5421 || r_type == R_PPC64_ADDR14_BRTAKEN
5422 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5423 }
5424
5425 /* Look through the relocs for a section during the first phase, and
5426 calculate needed space in the global offset table, procedure
5427 linkage table, and dynamic reloc sections. */
5428
5429 static bfd_boolean
5430 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5431 asection *sec, const Elf_Internal_Rela *relocs)
5432 {
5433 struct ppc_link_hash_table *htab;
5434 Elf_Internal_Shdr *symtab_hdr;
5435 struct elf_link_hash_entry **sym_hashes;
5436 const Elf_Internal_Rela *rel;
5437 const Elf_Internal_Rela *rel_end;
5438 asection *sreloc;
5439 struct elf_link_hash_entry *tga, *dottga;
5440 bfd_boolean is_opd;
5441
5442 if (bfd_link_relocatable (info))
5443 return TRUE;
5444
5445 /* Don't do anything special with non-loaded, non-alloced sections.
5446 In particular, any relocs in such sections should not affect GOT
5447 and PLT reference counting (ie. we don't allow them to create GOT
5448 or PLT entries), there's no possibility or desire to optimize TLS
5449 relocs, and there's not much point in propagating relocs to shared
5450 libs that the dynamic linker won't relocate. */
5451 if ((sec->flags & SEC_ALLOC) == 0)
5452 return TRUE;
5453
5454 BFD_ASSERT (is_ppc64_elf (abfd));
5455
5456 htab = ppc_hash_table (info);
5457 if (htab == NULL)
5458 return FALSE;
5459
5460 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5461 FALSE, FALSE, TRUE);
5462 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5463 FALSE, FALSE, TRUE);
5464 symtab_hdr = &elf_symtab_hdr (abfd);
5465 sym_hashes = elf_sym_hashes (abfd);
5466 sreloc = NULL;
5467 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5468 rel_end = relocs + sec->reloc_count;
5469 for (rel = relocs; rel < rel_end; rel++)
5470 {
5471 unsigned long r_symndx;
5472 struct elf_link_hash_entry *h;
5473 enum elf_ppc64_reloc_type r_type;
5474 int tls_type;
5475 struct _ppc64_elf_section_data *ppc64_sec;
5476 struct plt_entry **ifunc, **plt_list;
5477
5478 r_symndx = ELF64_R_SYM (rel->r_info);
5479 if (r_symndx < symtab_hdr->sh_info)
5480 h = NULL;
5481 else
5482 {
5483 struct ppc_link_hash_entry *eh;
5484
5485 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5486 h = elf_follow_link (h);
5487 eh = (struct ppc_link_hash_entry *) h;
5488
5489 /* PR15323, ref flags aren't set for references in the same
5490 object. */
5491 h->root.non_ir_ref_regular = 1;
5492 if (eh->is_func && eh->oh != NULL)
5493 eh->oh->elf.root.non_ir_ref_regular = 1;
5494
5495 if (h == htab->elf.hgot)
5496 sec->has_toc_reloc = 1;
5497 }
5498
5499 tls_type = 0;
5500 ifunc = NULL;
5501 if (h != NULL)
5502 {
5503 if (h->type == STT_GNU_IFUNC)
5504 {
5505 h->needs_plt = 1;
5506 ifunc = &h->plt.plist;
5507 }
5508 }
5509 else
5510 {
5511 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5512 abfd, r_symndx);
5513 if (isym == NULL)
5514 return FALSE;
5515
5516 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5517 {
5518 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5519 rel->r_addend, PLT_IFUNC);
5520 if (ifunc == NULL)
5521 return FALSE;
5522 }
5523 }
5524
5525 r_type = ELF64_R_TYPE (rel->r_info);
5526 switch (r_type)
5527 {
5528 case R_PPC64_TLSGD:
5529 case R_PPC64_TLSLD:
5530 /* These special tls relocs tie a call to __tls_get_addr with
5531 its parameter symbol. */
5532 break;
5533
5534 case R_PPC64_GOT_TLSLD16:
5535 case R_PPC64_GOT_TLSLD16_LO:
5536 case R_PPC64_GOT_TLSLD16_HI:
5537 case R_PPC64_GOT_TLSLD16_HA:
5538 tls_type = TLS_TLS | TLS_LD;
5539 goto dogottls;
5540
5541 case R_PPC64_GOT_TLSGD16:
5542 case R_PPC64_GOT_TLSGD16_LO:
5543 case R_PPC64_GOT_TLSGD16_HI:
5544 case R_PPC64_GOT_TLSGD16_HA:
5545 tls_type = TLS_TLS | TLS_GD;
5546 goto dogottls;
5547
5548 case R_PPC64_GOT_TPREL16_DS:
5549 case R_PPC64_GOT_TPREL16_LO_DS:
5550 case R_PPC64_GOT_TPREL16_HI:
5551 case R_PPC64_GOT_TPREL16_HA:
5552 if (bfd_link_dll (info))
5553 info->flags |= DF_STATIC_TLS;
5554 tls_type = TLS_TLS | TLS_TPREL;
5555 goto dogottls;
5556
5557 case R_PPC64_GOT_DTPREL16_DS:
5558 case R_PPC64_GOT_DTPREL16_LO_DS:
5559 case R_PPC64_GOT_DTPREL16_HI:
5560 case R_PPC64_GOT_DTPREL16_HA:
5561 tls_type = TLS_TLS | TLS_DTPREL;
5562 dogottls:
5563 sec->has_tls_reloc = 1;
5564 /* Fall through */
5565
5566 case R_PPC64_GOT16:
5567 case R_PPC64_GOT16_DS:
5568 case R_PPC64_GOT16_HA:
5569 case R_PPC64_GOT16_HI:
5570 case R_PPC64_GOT16_LO:
5571 case R_PPC64_GOT16_LO_DS:
5572 /* This symbol requires a global offset table entry. */
5573 sec->has_toc_reloc = 1;
5574 if (r_type == R_PPC64_GOT_TLSLD16
5575 || r_type == R_PPC64_GOT_TLSGD16
5576 || r_type == R_PPC64_GOT_TPREL16_DS
5577 || r_type == R_PPC64_GOT_DTPREL16_DS
5578 || r_type == R_PPC64_GOT16
5579 || r_type == R_PPC64_GOT16_DS)
5580 {
5581 htab->do_multi_toc = 1;
5582 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5583 }
5584
5585 if (ppc64_elf_tdata (abfd)->got == NULL
5586 && !create_got_section (abfd, info))
5587 return FALSE;
5588
5589 if (h != NULL)
5590 {
5591 struct ppc_link_hash_entry *eh;
5592 struct got_entry *ent;
5593
5594 eh = (struct ppc_link_hash_entry *) h;
5595 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5596 if (ent->addend == rel->r_addend
5597 && ent->owner == abfd
5598 && ent->tls_type == tls_type)
5599 break;
5600 if (ent == NULL)
5601 {
5602 bfd_size_type amt = sizeof (*ent);
5603 ent = bfd_alloc (abfd, amt);
5604 if (ent == NULL)
5605 return FALSE;
5606 ent->next = eh->elf.got.glist;
5607 ent->addend = rel->r_addend;
5608 ent->owner = abfd;
5609 ent->tls_type = tls_type;
5610 ent->is_indirect = FALSE;
5611 ent->got.refcount = 0;
5612 eh->elf.got.glist = ent;
5613 }
5614 ent->got.refcount += 1;
5615 eh->tls_mask |= tls_type;
5616 }
5617 else
5618 /* This is a global offset table entry for a local symbol. */
5619 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5620 rel->r_addend, tls_type))
5621 return FALSE;
5622
5623 /* We may also need a plt entry if the symbol turns out to be
5624 an ifunc. */
5625 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5626 {
5627 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5628 return FALSE;
5629 }
5630 break;
5631
5632 case R_PPC64_PLT16_HA:
5633 case R_PPC64_PLT16_HI:
5634 case R_PPC64_PLT16_LO:
5635 case R_PPC64_PLT32:
5636 case R_PPC64_PLT64:
5637 /* This symbol requires a procedure linkage table entry. */
5638 plt_list = ifunc;
5639 if (h != NULL)
5640 {
5641 h->needs_plt = 1;
5642 if (h->root.root.string[0] == '.'
5643 && h->root.root.string[1] != '\0')
5644 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5645 plt_list = &h->plt.plist;
5646 }
5647 if (plt_list == NULL)
5648 {
5649 /* It does not make sense to have a procedure linkage
5650 table entry for a non-ifunc local symbol. */
5651 info->callbacks->einfo
5652 /* xgettext:c-format */
5653 (_("%H: %s reloc against local symbol\n"),
5654 abfd, sec, rel->r_offset,
5655 ppc64_elf_howto_table[r_type]->name);
5656 bfd_set_error (bfd_error_bad_value);
5657 return FALSE;
5658 }
5659 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5660 return FALSE;
5661 break;
5662
5663 /* The following relocations don't need to propagate the
5664 relocation if linking a shared object since they are
5665 section relative. */
5666 case R_PPC64_SECTOFF:
5667 case R_PPC64_SECTOFF_LO:
5668 case R_PPC64_SECTOFF_HI:
5669 case R_PPC64_SECTOFF_HA:
5670 case R_PPC64_SECTOFF_DS:
5671 case R_PPC64_SECTOFF_LO_DS:
5672 case R_PPC64_DTPREL16:
5673 case R_PPC64_DTPREL16_LO:
5674 case R_PPC64_DTPREL16_HI:
5675 case R_PPC64_DTPREL16_HA:
5676 case R_PPC64_DTPREL16_DS:
5677 case R_PPC64_DTPREL16_LO_DS:
5678 case R_PPC64_DTPREL16_HIGH:
5679 case R_PPC64_DTPREL16_HIGHA:
5680 case R_PPC64_DTPREL16_HIGHER:
5681 case R_PPC64_DTPREL16_HIGHERA:
5682 case R_PPC64_DTPREL16_HIGHEST:
5683 case R_PPC64_DTPREL16_HIGHESTA:
5684 break;
5685
5686 /* Nor do these. */
5687 case R_PPC64_REL16:
5688 case R_PPC64_REL16_LO:
5689 case R_PPC64_REL16_HI:
5690 case R_PPC64_REL16_HA:
5691 case R_PPC64_REL16DX_HA:
5692 break;
5693
5694 /* Not supported as a dynamic relocation. */
5695 case R_PPC64_ADDR64_LOCAL:
5696 if (bfd_link_pic (info))
5697 {
5698 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5699 ppc_howto_init ();
5700 /* xgettext:c-format */
5701 info->callbacks->einfo (_("%H: %s reloc unsupported "
5702 "in shared libraries and PIEs.\n"),
5703 abfd, sec, rel->r_offset,
5704 ppc64_elf_howto_table[r_type]->name);
5705 bfd_set_error (bfd_error_bad_value);
5706 return FALSE;
5707 }
5708 break;
5709
5710 case R_PPC64_TOC16:
5711 case R_PPC64_TOC16_DS:
5712 htab->do_multi_toc = 1;
5713 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5714 /* Fall through. */
5715 case R_PPC64_TOC16_LO:
5716 case R_PPC64_TOC16_HI:
5717 case R_PPC64_TOC16_HA:
5718 case R_PPC64_TOC16_LO_DS:
5719 sec->has_toc_reloc = 1;
5720 break;
5721
5722 /* Marker reloc. */
5723 case R_PPC64_ENTRY:
5724 break;
5725
5726 /* This relocation describes the C++ object vtable hierarchy.
5727 Reconstruct it for later use during GC. */
5728 case R_PPC64_GNU_VTINHERIT:
5729 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5730 return FALSE;
5731 break;
5732
5733 /* This relocation describes which C++ vtable entries are actually
5734 used. Record for later use during GC. */
5735 case R_PPC64_GNU_VTENTRY:
5736 BFD_ASSERT (h != NULL);
5737 if (h != NULL
5738 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5739 return FALSE;
5740 break;
5741
5742 case R_PPC64_REL14:
5743 case R_PPC64_REL14_BRTAKEN:
5744 case R_PPC64_REL14_BRNTAKEN:
5745 {
5746 asection *dest = NULL;
5747
5748 /* Heuristic: If jumping outside our section, chances are
5749 we are going to need a stub. */
5750 if (h != NULL)
5751 {
5752 /* If the sym is weak it may be overridden later, so
5753 don't assume we know where a weak sym lives. */
5754 if (h->root.type == bfd_link_hash_defined)
5755 dest = h->root.u.def.section;
5756 }
5757 else
5758 {
5759 Elf_Internal_Sym *isym;
5760
5761 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5762 abfd, r_symndx);
5763 if (isym == NULL)
5764 return FALSE;
5765
5766 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5767 }
5768
5769 if (dest != sec)
5770 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5771 }
5772 /* Fall through. */
5773
5774 case R_PPC64_REL24:
5775 plt_list = ifunc;
5776 if (h != NULL)
5777 {
5778 h->needs_plt = 1;
5779 if (h->root.root.string[0] == '.'
5780 && h->root.root.string[1] != '\0')
5781 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5782
5783 if (h == tga || h == dottga)
5784 {
5785 sec->has_tls_reloc = 1;
5786 if (rel != relocs
5787 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5788 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5789 /* We have a new-style __tls_get_addr call with
5790 a marker reloc. */
5791 ;
5792 else
5793 /* Mark this section as having an old-style call. */
5794 sec->has_tls_get_addr_call = 1;
5795 }
5796 plt_list = &h->plt.plist;
5797 }
5798
5799 /* We may need a .plt entry if the function this reloc
5800 refers to is in a shared lib. */
5801 if (plt_list
5802 && !update_plt_info (abfd, plt_list, rel->r_addend))
5803 return FALSE;
5804 break;
5805
5806 case R_PPC64_ADDR14:
5807 case R_PPC64_ADDR14_BRNTAKEN:
5808 case R_PPC64_ADDR14_BRTAKEN:
5809 case R_PPC64_ADDR24:
5810 goto dodyn;
5811
5812 case R_PPC64_TPREL64:
5813 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5814 if (bfd_link_dll (info))
5815 info->flags |= DF_STATIC_TLS;
5816 goto dotlstoc;
5817
5818 case R_PPC64_DTPMOD64:
5819 if (rel + 1 < rel_end
5820 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5821 && rel[1].r_offset == rel->r_offset + 8)
5822 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5823 else
5824 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5825 goto dotlstoc;
5826
5827 case R_PPC64_DTPREL64:
5828 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5829 if (rel != relocs
5830 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5831 && rel[-1].r_offset == rel->r_offset - 8)
5832 /* This is the second reloc of a dtpmod, dtprel pair.
5833 Don't mark with TLS_DTPREL. */
5834 goto dodyn;
5835
5836 dotlstoc:
5837 sec->has_tls_reloc = 1;
5838 if (h != NULL)
5839 {
5840 struct ppc_link_hash_entry *eh;
5841 eh = (struct ppc_link_hash_entry *) h;
5842 eh->tls_mask |= tls_type;
5843 }
5844 else
5845 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5846 rel->r_addend, tls_type))
5847 return FALSE;
5848
5849 ppc64_sec = ppc64_elf_section_data (sec);
5850 if (ppc64_sec->sec_type != sec_toc)
5851 {
5852 bfd_size_type amt;
5853
5854 /* One extra to simplify get_tls_mask. */
5855 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5856 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5857 if (ppc64_sec->u.toc.symndx == NULL)
5858 return FALSE;
5859 amt = sec->size * sizeof (bfd_vma) / 8;
5860 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5861 if (ppc64_sec->u.toc.add == NULL)
5862 return FALSE;
5863 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5864 ppc64_sec->sec_type = sec_toc;
5865 }
5866 BFD_ASSERT (rel->r_offset % 8 == 0);
5867 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5868 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5869
5870 /* Mark the second slot of a GD or LD entry.
5871 -1 to indicate GD and -2 to indicate LD. */
5872 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5873 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5874 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5875 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5876 goto dodyn;
5877
5878 case R_PPC64_TPREL16:
5879 case R_PPC64_TPREL16_LO:
5880 case R_PPC64_TPREL16_HI:
5881 case R_PPC64_TPREL16_HA:
5882 case R_PPC64_TPREL16_DS:
5883 case R_PPC64_TPREL16_LO_DS:
5884 case R_PPC64_TPREL16_HIGH:
5885 case R_PPC64_TPREL16_HIGHA:
5886 case R_PPC64_TPREL16_HIGHER:
5887 case R_PPC64_TPREL16_HIGHERA:
5888 case R_PPC64_TPREL16_HIGHEST:
5889 case R_PPC64_TPREL16_HIGHESTA:
5890 if (bfd_link_dll (info))
5891 info->flags |= DF_STATIC_TLS;
5892 goto dodyn;
5893
5894 case R_PPC64_ADDR64:
5895 if (is_opd
5896 && rel + 1 < rel_end
5897 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5898 {
5899 if (h != NULL)
5900 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5901 }
5902 /* Fall through. */
5903
5904 case R_PPC64_ADDR16:
5905 case R_PPC64_ADDR16_DS:
5906 case R_PPC64_ADDR16_HA:
5907 case R_PPC64_ADDR16_HI:
5908 case R_PPC64_ADDR16_HIGH:
5909 case R_PPC64_ADDR16_HIGHA:
5910 case R_PPC64_ADDR16_HIGHER:
5911 case R_PPC64_ADDR16_HIGHERA:
5912 case R_PPC64_ADDR16_HIGHEST:
5913 case R_PPC64_ADDR16_HIGHESTA:
5914 case R_PPC64_ADDR16_LO:
5915 case R_PPC64_ADDR16_LO_DS:
5916 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5917 && rel->r_addend == 0)
5918 {
5919 /* We may need a .plt entry if this reloc refers to a
5920 function in a shared lib. */
5921 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5922 return FALSE;
5923 h->pointer_equality_needed = 1;
5924 }
5925 /* Fall through. */
5926
5927 case R_PPC64_REL30:
5928 case R_PPC64_REL32:
5929 case R_PPC64_REL64:
5930 case R_PPC64_ADDR32:
5931 case R_PPC64_UADDR16:
5932 case R_PPC64_UADDR32:
5933 case R_PPC64_UADDR64:
5934 case R_PPC64_TOC:
5935 if (h != NULL && !bfd_link_pic (info))
5936 /* We may need a copy reloc. */
5937 h->non_got_ref = 1;
5938
5939 /* Don't propagate .opd relocs. */
5940 if (NO_OPD_RELOCS && is_opd)
5941 break;
5942
5943 /* If we are creating a shared library, and this is a reloc
5944 against a global symbol, or a non PC relative reloc
5945 against a local symbol, then we need to copy the reloc
5946 into the shared library. However, if we are linking with
5947 -Bsymbolic, we do not need to copy a reloc against a
5948 global symbol which is defined in an object we are
5949 including in the link (i.e., DEF_REGULAR is set). At
5950 this point we have not seen all the input files, so it is
5951 possible that DEF_REGULAR is not set now but will be set
5952 later (it is never cleared). In case of a weak definition,
5953 DEF_REGULAR may be cleared later by a strong definition in
5954 a shared library. We account for that possibility below by
5955 storing information in the dyn_relocs field of the hash
5956 table entry. A similar situation occurs when creating
5957 shared libraries and symbol visibility changes render the
5958 symbol local.
5959
5960 If on the other hand, we are creating an executable, we
5961 may need to keep relocations for symbols satisfied by a
5962 dynamic library if we manage to avoid copy relocs for the
5963 symbol. */
5964 dodyn:
5965 if ((bfd_link_pic (info)
5966 && (must_be_dyn_reloc (info, r_type)
5967 || (h != NULL
5968 && (!SYMBOLIC_BIND (info, h)
5969 || h->root.type == bfd_link_hash_defweak
5970 || !h->def_regular))))
5971 || (ELIMINATE_COPY_RELOCS
5972 && !bfd_link_pic (info)
5973 && h != NULL
5974 && (h->root.type == bfd_link_hash_defweak
5975 || !h->def_regular))
5976 || (!bfd_link_pic (info)
5977 && ifunc != NULL))
5978 {
5979 /* We must copy these reloc types into the output file.
5980 Create a reloc section in dynobj and make room for
5981 this reloc. */
5982 if (sreloc == NULL)
5983 {
5984 sreloc = _bfd_elf_make_dynamic_reloc_section
5985 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5986
5987 if (sreloc == NULL)
5988 return FALSE;
5989 }
5990
5991 /* If this is a global symbol, we count the number of
5992 relocations we need for this symbol. */
5993 if (h != NULL)
5994 {
5995 struct elf_dyn_relocs *p;
5996 struct elf_dyn_relocs **head;
5997
5998 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5999 p = *head;
6000 if (p == NULL || p->sec != sec)
6001 {
6002 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6003 if (p == NULL)
6004 return FALSE;
6005 p->next = *head;
6006 *head = p;
6007 p->sec = sec;
6008 p->count = 0;
6009 p->pc_count = 0;
6010 }
6011 p->count += 1;
6012 if (!must_be_dyn_reloc (info, r_type))
6013 p->pc_count += 1;
6014 }
6015 else
6016 {
6017 /* Track dynamic relocs needed for local syms too.
6018 We really need local syms available to do this
6019 easily. Oh well. */
6020 struct ppc_dyn_relocs *p;
6021 struct ppc_dyn_relocs **head;
6022 bfd_boolean is_ifunc;
6023 asection *s;
6024 void *vpp;
6025 Elf_Internal_Sym *isym;
6026
6027 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6028 abfd, r_symndx);
6029 if (isym == NULL)
6030 return FALSE;
6031
6032 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6033 if (s == NULL)
6034 s = sec;
6035
6036 vpp = &elf_section_data (s)->local_dynrel;
6037 head = (struct ppc_dyn_relocs **) vpp;
6038 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6039 p = *head;
6040 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6041 p = p->next;
6042 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6043 {
6044 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6045 if (p == NULL)
6046 return FALSE;
6047 p->next = *head;
6048 *head = p;
6049 p->sec = sec;
6050 p->ifunc = is_ifunc;
6051 p->count = 0;
6052 }
6053 p->count += 1;
6054 }
6055 }
6056 break;
6057
6058 default:
6059 break;
6060 }
6061 }
6062
6063 return TRUE;
6064 }
6065
6066 /* Merge backend specific data from an object file to the output
6067 object file when linking. */
6068
6069 static bfd_boolean
6070 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6071 {
6072 bfd *obfd = info->output_bfd;
6073 unsigned long iflags, oflags;
6074
6075 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6076 return TRUE;
6077
6078 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6079 return TRUE;
6080
6081 if (!_bfd_generic_verify_endian_match (ibfd, info))
6082 return FALSE;
6083
6084 iflags = elf_elfheader (ibfd)->e_flags;
6085 oflags = elf_elfheader (obfd)->e_flags;
6086
6087 if (iflags & ~EF_PPC64_ABI)
6088 {
6089 _bfd_error_handler
6090 /* xgettext:c-format */
6091 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6092 bfd_set_error (bfd_error_bad_value);
6093 return FALSE;
6094 }
6095 else if (iflags != oflags && iflags != 0)
6096 {
6097 _bfd_error_handler
6098 /* xgettext:c-format */
6099 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6100 ibfd, iflags, oflags);
6101 bfd_set_error (bfd_error_bad_value);
6102 return FALSE;
6103 }
6104
6105 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6106
6107 /* Merge Tag_compatibility attributes and any common GNU ones. */
6108 _bfd_elf_merge_object_attributes (ibfd, info);
6109
6110 return TRUE;
6111 }
6112
6113 static bfd_boolean
6114 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6115 {
6116 /* Print normal ELF private data. */
6117 _bfd_elf_print_private_bfd_data (abfd, ptr);
6118
6119 if (elf_elfheader (abfd)->e_flags != 0)
6120 {
6121 FILE *file = ptr;
6122
6123 fprintf (file, _("private flags = 0x%lx:"),
6124 elf_elfheader (abfd)->e_flags);
6125
6126 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6127 fprintf (file, _(" [abiv%ld]"),
6128 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6129 fputc ('\n', file);
6130 }
6131
6132 return TRUE;
6133 }
6134
6135 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6136 of the code entry point, and its section, which must be in the same
6137 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6138
6139 static bfd_vma
6140 opd_entry_value (asection *opd_sec,
6141 bfd_vma offset,
6142 asection **code_sec,
6143 bfd_vma *code_off,
6144 bfd_boolean in_code_sec)
6145 {
6146 bfd *opd_bfd = opd_sec->owner;
6147 Elf_Internal_Rela *relocs;
6148 Elf_Internal_Rela *lo, *hi, *look;
6149 bfd_vma val;
6150
6151 /* No relocs implies we are linking a --just-symbols object, or looking
6152 at a final linked executable with addr2line or somesuch. */
6153 if (opd_sec->reloc_count == 0)
6154 {
6155 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6156
6157 if (contents == NULL)
6158 {
6159 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6160 return (bfd_vma) -1;
6161 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6162 }
6163
6164 /* PR 17512: file: 64b9dfbb. */
6165 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6166 return (bfd_vma) -1;
6167
6168 val = bfd_get_64 (opd_bfd, contents + offset);
6169 if (code_sec != NULL)
6170 {
6171 asection *sec, *likely = NULL;
6172
6173 if (in_code_sec)
6174 {
6175 sec = *code_sec;
6176 if (sec->vma <= val
6177 && val < sec->vma + sec->size)
6178 likely = sec;
6179 else
6180 val = -1;
6181 }
6182 else
6183 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6184 if (sec->vma <= val
6185 && (sec->flags & SEC_LOAD) != 0
6186 && (sec->flags & SEC_ALLOC) != 0)
6187 likely = sec;
6188 if (likely != NULL)
6189 {
6190 *code_sec = likely;
6191 if (code_off != NULL)
6192 *code_off = val - likely->vma;
6193 }
6194 }
6195 return val;
6196 }
6197
6198 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6199
6200 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6201 if (relocs == NULL)
6202 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6203 /* PR 17512: file: df8e1fd6. */
6204 if (relocs == NULL)
6205 return (bfd_vma) -1;
6206
6207 /* Go find the opd reloc at the sym address. */
6208 lo = relocs;
6209 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6210 val = (bfd_vma) -1;
6211 while (lo < hi)
6212 {
6213 look = lo + (hi - lo) / 2;
6214 if (look->r_offset < offset)
6215 lo = look + 1;
6216 else if (look->r_offset > offset)
6217 hi = look;
6218 else
6219 {
6220 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6221
6222 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6223 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6224 {
6225 unsigned long symndx = ELF64_R_SYM (look->r_info);
6226 asection *sec = NULL;
6227
6228 if (symndx >= symtab_hdr->sh_info
6229 && elf_sym_hashes (opd_bfd) != NULL)
6230 {
6231 struct elf_link_hash_entry **sym_hashes;
6232 struct elf_link_hash_entry *rh;
6233
6234 sym_hashes = elf_sym_hashes (opd_bfd);
6235 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6236 if (rh != NULL)
6237 {
6238 rh = elf_follow_link (rh);
6239 if (rh->root.type != bfd_link_hash_defined
6240 && rh->root.type != bfd_link_hash_defweak)
6241 break;
6242 if (rh->root.u.def.section->owner == opd_bfd)
6243 {
6244 val = rh->root.u.def.value;
6245 sec = rh->root.u.def.section;
6246 }
6247 }
6248 }
6249
6250 if (sec == NULL)
6251 {
6252 Elf_Internal_Sym *sym;
6253
6254 if (symndx < symtab_hdr->sh_info)
6255 {
6256 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6257 if (sym == NULL)
6258 {
6259 size_t symcnt = symtab_hdr->sh_info;
6260 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6261 symcnt, 0,
6262 NULL, NULL, NULL);
6263 if (sym == NULL)
6264 break;
6265 symtab_hdr->contents = (bfd_byte *) sym;
6266 }
6267 sym += symndx;
6268 }
6269 else
6270 {
6271 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6272 1, symndx,
6273 NULL, NULL, NULL);
6274 if (sym == NULL)
6275 break;
6276 }
6277 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6278 if (sec == NULL)
6279 break;
6280 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6281 val = sym->st_value;
6282 }
6283
6284 val += look->r_addend;
6285 if (code_off != NULL)
6286 *code_off = val;
6287 if (code_sec != NULL)
6288 {
6289 if (in_code_sec && *code_sec != sec)
6290 return -1;
6291 else
6292 *code_sec = sec;
6293 }
6294 if (sec->output_section != NULL)
6295 val += sec->output_section->vma + sec->output_offset;
6296 }
6297 break;
6298 }
6299 }
6300
6301 return val;
6302 }
6303
6304 /* If the ELF symbol SYM might be a function in SEC, return the
6305 function size and set *CODE_OFF to the function's entry point,
6306 otherwise return zero. */
6307
6308 static bfd_size_type
6309 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6310 bfd_vma *code_off)
6311 {
6312 bfd_size_type size;
6313
6314 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6315 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6316 return 0;
6317
6318 size = 0;
6319 if (!(sym->flags & BSF_SYNTHETIC))
6320 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6321
6322 if (strcmp (sym->section->name, ".opd") == 0)
6323 {
6324 struct _opd_sec_data *opd = get_opd_info (sym->section);
6325 bfd_vma symval = sym->value;
6326
6327 if (opd != NULL
6328 && opd->adjust != NULL
6329 && elf_section_data (sym->section)->relocs != NULL)
6330 {
6331 /* opd_entry_value will use cached relocs that have been
6332 adjusted, but with raw symbols. That means both local
6333 and global symbols need adjusting. */
6334 long adjust = opd->adjust[OPD_NDX (symval)];
6335 if (adjust == -1)
6336 return 0;
6337 symval += adjust;
6338 }
6339
6340 if (opd_entry_value (sym->section, symval,
6341 &sec, code_off, TRUE) == (bfd_vma) -1)
6342 return 0;
6343 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6344 symbol. This size has nothing to do with the code size of the
6345 function, which is what we're supposed to return, but the
6346 code size isn't available without looking up the dot-sym.
6347 However, doing that would be a waste of time particularly
6348 since elf_find_function will look at the dot-sym anyway.
6349 Now, elf_find_function will keep the largest size of any
6350 function sym found at the code address of interest, so return
6351 1 here to avoid it incorrectly caching a larger function size
6352 for a small function. This does mean we return the wrong
6353 size for a new-ABI function of size 24, but all that does is
6354 disable caching for such functions. */
6355 if (size == 24)
6356 size = 1;
6357 }
6358 else
6359 {
6360 if (sym->section != sec)
6361 return 0;
6362 *code_off = sym->value;
6363 }
6364 if (size == 0)
6365 size = 1;
6366 return size;
6367 }
6368
6369 /* Return true if symbol is a strong function defined in an ELFv2
6370 object with st_other localentry bits of zero, ie. its local entry
6371 point coincides with its global entry point. */
6372
6373 static bfd_boolean
6374 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6375 {
6376 return (h != NULL
6377 && h->type == STT_FUNC
6378 && h->root.type == bfd_link_hash_defined
6379 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6380 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6381 && is_ppc64_elf (h->root.u.def.section->owner)
6382 && abiversion (h->root.u.def.section->owner) >= 2);
6383 }
6384
6385 /* Return true if symbol is defined in a regular object file. */
6386
6387 static bfd_boolean
6388 is_static_defined (struct elf_link_hash_entry *h)
6389 {
6390 return ((h->root.type == bfd_link_hash_defined
6391 || h->root.type == bfd_link_hash_defweak)
6392 && h->root.u.def.section != NULL
6393 && h->root.u.def.section->output_section != NULL);
6394 }
6395
6396 /* If FDH is a function descriptor symbol, return the associated code
6397 entry symbol if it is defined. Return NULL otherwise. */
6398
6399 static struct ppc_link_hash_entry *
6400 defined_code_entry (struct ppc_link_hash_entry *fdh)
6401 {
6402 if (fdh->is_func_descriptor)
6403 {
6404 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6405 if (fh->elf.root.type == bfd_link_hash_defined
6406 || fh->elf.root.type == bfd_link_hash_defweak)
6407 return fh;
6408 }
6409 return NULL;
6410 }
6411
6412 /* If FH is a function code entry symbol, return the associated
6413 function descriptor symbol if it is defined. Return NULL otherwise. */
6414
6415 static struct ppc_link_hash_entry *
6416 defined_func_desc (struct ppc_link_hash_entry *fh)
6417 {
6418 if (fh->oh != NULL
6419 && fh->oh->is_func_descriptor)
6420 {
6421 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6422 if (fdh->elf.root.type == bfd_link_hash_defined
6423 || fdh->elf.root.type == bfd_link_hash_defweak)
6424 return fdh;
6425 }
6426 return NULL;
6427 }
6428
6429 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6430
6431 /* Garbage collect sections, after first dealing with dot-symbols. */
6432
6433 static bfd_boolean
6434 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6435 {
6436 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6437
6438 if (htab != NULL && htab->need_func_desc_adj)
6439 {
6440 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6441 htab->need_func_desc_adj = 0;
6442 }
6443 return bfd_elf_gc_sections (abfd, info);
6444 }
6445
6446 /* Mark all our entry sym sections, both opd and code section. */
6447
6448 static void
6449 ppc64_elf_gc_keep (struct bfd_link_info *info)
6450 {
6451 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6452 struct bfd_sym_chain *sym;
6453
6454 if (htab == NULL)
6455 return;
6456
6457 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6458 {
6459 struct ppc_link_hash_entry *eh, *fh;
6460 asection *sec;
6461
6462 eh = (struct ppc_link_hash_entry *)
6463 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6464 if (eh == NULL)
6465 continue;
6466 if (eh->elf.root.type != bfd_link_hash_defined
6467 && eh->elf.root.type != bfd_link_hash_defweak)
6468 continue;
6469
6470 fh = defined_code_entry (eh);
6471 if (fh != NULL)
6472 {
6473 sec = fh->elf.root.u.def.section;
6474 sec->flags |= SEC_KEEP;
6475 }
6476 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6477 && opd_entry_value (eh->elf.root.u.def.section,
6478 eh->elf.root.u.def.value,
6479 &sec, NULL, FALSE) != (bfd_vma) -1)
6480 sec->flags |= SEC_KEEP;
6481
6482 sec = eh->elf.root.u.def.section;
6483 sec->flags |= SEC_KEEP;
6484 }
6485 }
6486
6487 /* Mark sections containing dynamically referenced symbols. When
6488 building shared libraries, we must assume that any visible symbol is
6489 referenced. */
6490
6491 static bfd_boolean
6492 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6493 {
6494 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6495 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6496 struct ppc_link_hash_entry *fdh;
6497 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6498
6499 /* Dynamic linking info is on the func descriptor sym. */
6500 fdh = defined_func_desc (eh);
6501 if (fdh != NULL)
6502 eh = fdh;
6503
6504 if ((eh->elf.root.type == bfd_link_hash_defined
6505 || eh->elf.root.type == bfd_link_hash_defweak)
6506 && (eh->elf.ref_dynamic
6507 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6508 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6509 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6510 && (!bfd_link_executable (info)
6511 || info->gc_keep_exported
6512 || info->export_dynamic
6513 || (eh->elf.dynamic
6514 && d != NULL
6515 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6516 && (eh->elf.versioned >= versioned
6517 || !bfd_hide_sym_by_version (info->version_info,
6518 eh->elf.root.root.string)))))
6519 {
6520 asection *code_sec;
6521 struct ppc_link_hash_entry *fh;
6522
6523 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6524
6525 /* Function descriptor syms cause the associated
6526 function code sym section to be marked. */
6527 fh = defined_code_entry (eh);
6528 if (fh != NULL)
6529 {
6530 code_sec = fh->elf.root.u.def.section;
6531 code_sec->flags |= SEC_KEEP;
6532 }
6533 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6534 && opd_entry_value (eh->elf.root.u.def.section,
6535 eh->elf.root.u.def.value,
6536 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6537 code_sec->flags |= SEC_KEEP;
6538 }
6539
6540 return TRUE;
6541 }
6542
6543 /* Return the section that should be marked against GC for a given
6544 relocation. */
6545
6546 static asection *
6547 ppc64_elf_gc_mark_hook (asection *sec,
6548 struct bfd_link_info *info,
6549 Elf_Internal_Rela *rel,
6550 struct elf_link_hash_entry *h,
6551 Elf_Internal_Sym *sym)
6552 {
6553 asection *rsec;
6554
6555 /* Syms return NULL if we're marking .opd, so we avoid marking all
6556 function sections, as all functions are referenced in .opd. */
6557 rsec = NULL;
6558 if (get_opd_info (sec) != NULL)
6559 return rsec;
6560
6561 if (h != NULL)
6562 {
6563 enum elf_ppc64_reloc_type r_type;
6564 struct ppc_link_hash_entry *eh, *fh, *fdh;
6565
6566 r_type = ELF64_R_TYPE (rel->r_info);
6567 switch (r_type)
6568 {
6569 case R_PPC64_GNU_VTINHERIT:
6570 case R_PPC64_GNU_VTENTRY:
6571 break;
6572
6573 default:
6574 switch (h->root.type)
6575 {
6576 case bfd_link_hash_defined:
6577 case bfd_link_hash_defweak:
6578 eh = (struct ppc_link_hash_entry *) h;
6579 fdh = defined_func_desc (eh);
6580 if (fdh != NULL)
6581 {
6582 /* -mcall-aixdesc code references the dot-symbol on
6583 a call reloc. Mark the function descriptor too
6584 against garbage collection. */
6585 fdh->elf.mark = 1;
6586 if (fdh->elf.u.weakdef != NULL)
6587 fdh->elf.u.weakdef->mark = 1;
6588 eh = fdh;
6589 }
6590
6591 /* Function descriptor syms cause the associated
6592 function code sym section to be marked. */
6593 fh = defined_code_entry (eh);
6594 if (fh != NULL)
6595 {
6596 /* They also mark their opd section. */
6597 eh->elf.root.u.def.section->gc_mark = 1;
6598
6599 rsec = fh->elf.root.u.def.section;
6600 }
6601 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6602 && opd_entry_value (eh->elf.root.u.def.section,
6603 eh->elf.root.u.def.value,
6604 &rsec, NULL, FALSE) != (bfd_vma) -1)
6605 eh->elf.root.u.def.section->gc_mark = 1;
6606 else
6607 rsec = h->root.u.def.section;
6608 break;
6609
6610 case bfd_link_hash_common:
6611 rsec = h->root.u.c.p->section;
6612 break;
6613
6614 default:
6615 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6616 }
6617 }
6618 }
6619 else
6620 {
6621 struct _opd_sec_data *opd;
6622
6623 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6624 opd = get_opd_info (rsec);
6625 if (opd != NULL && opd->func_sec != NULL)
6626 {
6627 rsec->gc_mark = 1;
6628
6629 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6630 }
6631 }
6632
6633 return rsec;
6634 }
6635
6636 /* Update the .got, .plt. and dynamic reloc reference counts for the
6637 section being removed. */
6638
6639 static bfd_boolean
6640 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6641 asection *sec, const Elf_Internal_Rela *relocs)
6642 {
6643 struct ppc_link_hash_table *htab;
6644 Elf_Internal_Shdr *symtab_hdr;
6645 struct elf_link_hash_entry **sym_hashes;
6646 struct got_entry **local_got_ents;
6647 const Elf_Internal_Rela *rel, *relend;
6648
6649 if (bfd_link_relocatable (info))
6650 return TRUE;
6651
6652 if ((sec->flags & SEC_ALLOC) == 0)
6653 return TRUE;
6654
6655 elf_section_data (sec)->local_dynrel = NULL;
6656
6657 htab = ppc_hash_table (info);
6658 if (htab == NULL)
6659 return FALSE;
6660
6661 symtab_hdr = &elf_symtab_hdr (abfd);
6662 sym_hashes = elf_sym_hashes (abfd);
6663 local_got_ents = elf_local_got_ents (abfd);
6664
6665 relend = relocs + sec->reloc_count;
6666 for (rel = relocs; rel < relend; rel++)
6667 {
6668 unsigned long r_symndx;
6669 enum elf_ppc64_reloc_type r_type;
6670 struct elf_link_hash_entry *h = NULL;
6671 struct plt_entry **plt_list = NULL;
6672 unsigned char tls_type = 0;
6673
6674 r_symndx = ELF64_R_SYM (rel->r_info);
6675 r_type = ELF64_R_TYPE (rel->r_info);
6676 if (r_symndx >= symtab_hdr->sh_info)
6677 {
6678 struct ppc_link_hash_entry *eh;
6679 struct elf_dyn_relocs **pp;
6680 struct elf_dyn_relocs *p;
6681
6682 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6683 h = elf_follow_link (h);
6684 eh = (struct ppc_link_hash_entry *) h;
6685
6686 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6687 if (p->sec == sec)
6688 {
6689 /* Everything must go for SEC. */
6690 *pp = p->next;
6691 break;
6692 }
6693 }
6694
6695 switch (r_type)
6696 {
6697 case R_PPC64_GOT_TLSLD16:
6698 case R_PPC64_GOT_TLSLD16_LO:
6699 case R_PPC64_GOT_TLSLD16_HI:
6700 case R_PPC64_GOT_TLSLD16_HA:
6701 tls_type = TLS_TLS | TLS_LD;
6702 goto dogot;
6703
6704 case R_PPC64_GOT_TLSGD16:
6705 case R_PPC64_GOT_TLSGD16_LO:
6706 case R_PPC64_GOT_TLSGD16_HI:
6707 case R_PPC64_GOT_TLSGD16_HA:
6708 tls_type = TLS_TLS | TLS_GD;
6709 goto dogot;
6710
6711 case R_PPC64_GOT_TPREL16_DS:
6712 case R_PPC64_GOT_TPREL16_LO_DS:
6713 case R_PPC64_GOT_TPREL16_HI:
6714 case R_PPC64_GOT_TPREL16_HA:
6715 tls_type = TLS_TLS | TLS_TPREL;
6716 goto dogot;
6717
6718 case R_PPC64_GOT_DTPREL16_DS:
6719 case R_PPC64_GOT_DTPREL16_LO_DS:
6720 case R_PPC64_GOT_DTPREL16_HI:
6721 case R_PPC64_GOT_DTPREL16_HA:
6722 tls_type = TLS_TLS | TLS_DTPREL;
6723 goto dogot;
6724
6725 case R_PPC64_GOT16:
6726 case R_PPC64_GOT16_DS:
6727 case R_PPC64_GOT16_HA:
6728 case R_PPC64_GOT16_HI:
6729 case R_PPC64_GOT16_LO:
6730 case R_PPC64_GOT16_LO_DS:
6731 dogot:
6732 {
6733 struct got_entry *ent;
6734
6735 if (h != NULL)
6736 ent = h->got.glist;
6737 else
6738 ent = local_got_ents[r_symndx];
6739
6740 for (; ent != NULL; ent = ent->next)
6741 if (ent->addend == rel->r_addend
6742 && ent->owner == abfd
6743 && ent->tls_type == tls_type)
6744 break;
6745 if (ent == NULL)
6746 abort ();
6747 if (ent->got.refcount > 0)
6748 ent->got.refcount -= 1;
6749 }
6750 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6751 plt_list = &h->plt.plist;
6752 break;
6753
6754 case R_PPC64_PLT16_HA:
6755 case R_PPC64_PLT16_HI:
6756 case R_PPC64_PLT16_LO:
6757 case R_PPC64_PLT32:
6758 case R_PPC64_PLT64:
6759 case R_PPC64_REL14:
6760 case R_PPC64_REL14_BRNTAKEN:
6761 case R_PPC64_REL14_BRTAKEN:
6762 case R_PPC64_REL24:
6763 if (h != NULL)
6764 plt_list = &h->plt.plist;
6765 else if (local_got_ents != NULL)
6766 {
6767 struct plt_entry **local_plt = (struct plt_entry **)
6768 (local_got_ents + symtab_hdr->sh_info);
6769 unsigned char *local_got_tls_masks = (unsigned char *)
6770 (local_plt + symtab_hdr->sh_info);
6771 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6772 plt_list = local_plt + r_symndx;
6773 }
6774 break;
6775
6776 case R_PPC64_ADDR64:
6777 case R_PPC64_ADDR16:
6778 case R_PPC64_ADDR16_DS:
6779 case R_PPC64_ADDR16_HA:
6780 case R_PPC64_ADDR16_HI:
6781 case R_PPC64_ADDR16_HIGH:
6782 case R_PPC64_ADDR16_HIGHA:
6783 case R_PPC64_ADDR16_HIGHER:
6784 case R_PPC64_ADDR16_HIGHERA:
6785 case R_PPC64_ADDR16_HIGHEST:
6786 case R_PPC64_ADDR16_HIGHESTA:
6787 case R_PPC64_ADDR16_LO:
6788 case R_PPC64_ADDR16_LO_DS:
6789 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6790 && rel->r_addend == 0)
6791 plt_list = &h->plt.plist;
6792 break;
6793
6794 default:
6795 break;
6796 }
6797 if (plt_list != NULL)
6798 {
6799 struct plt_entry *ent;
6800
6801 for (ent = *plt_list; ent != NULL; ent = ent->next)
6802 if (ent->addend == rel->r_addend)
6803 break;
6804 if (ent != NULL && ent->plt.refcount > 0)
6805 ent->plt.refcount -= 1;
6806 }
6807 }
6808 return TRUE;
6809 }
6810
6811 /* The maximum size of .sfpr. */
6812 #define SFPR_MAX (218*4)
6813
6814 struct sfpr_def_parms
6815 {
6816 const char name[12];
6817 unsigned char lo, hi;
6818 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6819 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6820 };
6821
6822 /* Auto-generate _save*, _rest* functions in .sfpr.
6823 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6824 instead. */
6825
6826 static bfd_boolean
6827 sfpr_define (struct bfd_link_info *info,
6828 const struct sfpr_def_parms *parm,
6829 asection *stub_sec)
6830 {
6831 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6832 unsigned int i;
6833 size_t len = strlen (parm->name);
6834 bfd_boolean writing = FALSE;
6835 char sym[16];
6836
6837 if (htab == NULL)
6838 return FALSE;
6839
6840 memcpy (sym, parm->name, len);
6841 sym[len + 2] = 0;
6842
6843 for (i = parm->lo; i <= parm->hi; i++)
6844 {
6845 struct ppc_link_hash_entry *h;
6846
6847 sym[len + 0] = i / 10 + '0';
6848 sym[len + 1] = i % 10 + '0';
6849 h = (struct ppc_link_hash_entry *)
6850 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6851 if (stub_sec != NULL)
6852 {
6853 if (h != NULL
6854 && h->elf.root.type == bfd_link_hash_defined
6855 && h->elf.root.u.def.section == htab->sfpr)
6856 {
6857 struct elf_link_hash_entry *s;
6858 char buf[32];
6859 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6860 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6861 if (s == NULL)
6862 return FALSE;
6863 if (s->root.type == bfd_link_hash_new
6864 || (s->root.type = bfd_link_hash_defined
6865 && s->root.u.def.section == stub_sec))
6866 {
6867 s->root.type = bfd_link_hash_defined;
6868 s->root.u.def.section = stub_sec;
6869 s->root.u.def.value = (stub_sec->size
6870 + h->elf.root.u.def.value);
6871 s->ref_regular = 1;
6872 s->def_regular = 1;
6873 s->ref_regular_nonweak = 1;
6874 s->forced_local = 1;
6875 s->non_elf = 0;
6876 s->root.linker_def = 1;
6877 }
6878 }
6879 continue;
6880 }
6881 if (h != NULL)
6882 {
6883 h->save_res = 1;
6884 if (!h->elf.def_regular)
6885 {
6886 h->elf.root.type = bfd_link_hash_defined;
6887 h->elf.root.u.def.section = htab->sfpr;
6888 h->elf.root.u.def.value = htab->sfpr->size;
6889 h->elf.type = STT_FUNC;
6890 h->elf.def_regular = 1;
6891 h->elf.non_elf = 0;
6892 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6893 writing = TRUE;
6894 if (htab->sfpr->contents == NULL)
6895 {
6896 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6897 if (htab->sfpr->contents == NULL)
6898 return FALSE;
6899 }
6900 }
6901 }
6902 if (writing)
6903 {
6904 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6905 if (i != parm->hi)
6906 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6907 else
6908 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6909 htab->sfpr->size = p - htab->sfpr->contents;
6910 }
6911 }
6912
6913 return TRUE;
6914 }
6915
6916 static bfd_byte *
6917 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6918 {
6919 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6920 return p + 4;
6921 }
6922
6923 static bfd_byte *
6924 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6925 {
6926 p = savegpr0 (abfd, p, r);
6927 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6928 p = p + 4;
6929 bfd_put_32 (abfd, BLR, p);
6930 return p + 4;
6931 }
6932
6933 static bfd_byte *
6934 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6935 {
6936 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6937 return p + 4;
6938 }
6939
6940 static bfd_byte *
6941 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6942 {
6943 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6944 p = p + 4;
6945 p = restgpr0 (abfd, p, r);
6946 bfd_put_32 (abfd, MTLR_R0, p);
6947 p = p + 4;
6948 if (r == 29)
6949 {
6950 p = restgpr0 (abfd, p, 30);
6951 p = restgpr0 (abfd, p, 31);
6952 }
6953 bfd_put_32 (abfd, BLR, p);
6954 return p + 4;
6955 }
6956
6957 static bfd_byte *
6958 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6959 {
6960 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6961 return p + 4;
6962 }
6963
6964 static bfd_byte *
6965 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6966 {
6967 p = savegpr1 (abfd, p, r);
6968 bfd_put_32 (abfd, BLR, p);
6969 return p + 4;
6970 }
6971
6972 static bfd_byte *
6973 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6974 {
6975 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6976 return p + 4;
6977 }
6978
6979 static bfd_byte *
6980 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6981 {
6982 p = restgpr1 (abfd, p, r);
6983 bfd_put_32 (abfd, BLR, p);
6984 return p + 4;
6985 }
6986
6987 static bfd_byte *
6988 savefpr (bfd *abfd, bfd_byte *p, int r)
6989 {
6990 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6991 return p + 4;
6992 }
6993
6994 static bfd_byte *
6995 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6996 {
6997 p = savefpr (abfd, p, r);
6998 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6999 p = p + 4;
7000 bfd_put_32 (abfd, BLR, p);
7001 return p + 4;
7002 }
7003
7004 static bfd_byte *
7005 restfpr (bfd *abfd, bfd_byte *p, int r)
7006 {
7007 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
7008 return p + 4;
7009 }
7010
7011 static bfd_byte *
7012 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
7013 {
7014 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
7015 p = p + 4;
7016 p = restfpr (abfd, p, r);
7017 bfd_put_32 (abfd, MTLR_R0, p);
7018 p = p + 4;
7019 if (r == 29)
7020 {
7021 p = restfpr (abfd, p, 30);
7022 p = restfpr (abfd, p, 31);
7023 }
7024 bfd_put_32 (abfd, BLR, p);
7025 return p + 4;
7026 }
7027
7028 static bfd_byte *
7029 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
7030 {
7031 p = savefpr (abfd, p, r);
7032 bfd_put_32 (abfd, BLR, p);
7033 return p + 4;
7034 }
7035
7036 static bfd_byte *
7037 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
7038 {
7039 p = restfpr (abfd, p, r);
7040 bfd_put_32 (abfd, BLR, p);
7041 return p + 4;
7042 }
7043
7044 static bfd_byte *
7045 savevr (bfd *abfd, bfd_byte *p, int r)
7046 {
7047 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7048 p = p + 4;
7049 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
7050 return p + 4;
7051 }
7052
7053 static bfd_byte *
7054 savevr_tail (bfd *abfd, bfd_byte *p, int r)
7055 {
7056 p = savevr (abfd, p, r);
7057 bfd_put_32 (abfd, BLR, p);
7058 return p + 4;
7059 }
7060
7061 static bfd_byte *
7062 restvr (bfd *abfd, bfd_byte *p, int r)
7063 {
7064 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7065 p = p + 4;
7066 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7067 return p + 4;
7068 }
7069
7070 static bfd_byte *
7071 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7072 {
7073 p = restvr (abfd, p, r);
7074 bfd_put_32 (abfd, BLR, p);
7075 return p + 4;
7076 }
7077
7078 /* Called via elf_link_hash_traverse to transfer dynamic linking
7079 information on function code symbol entries to their corresponding
7080 function descriptor symbol entries. */
7081
7082 static bfd_boolean
7083 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7084 {
7085 struct bfd_link_info *info;
7086 struct ppc_link_hash_table *htab;
7087 struct ppc_link_hash_entry *fh;
7088 struct ppc_link_hash_entry *fdh;
7089 bfd_boolean force_local;
7090
7091 fh = (struct ppc_link_hash_entry *) h;
7092 if (fh->elf.root.type == bfd_link_hash_indirect)
7093 return TRUE;
7094
7095 if (!fh->is_func)
7096 return TRUE;
7097
7098 if (fh->elf.root.root.string[0] != '.'
7099 || fh->elf.root.root.string[1] == '\0')
7100 return TRUE;
7101
7102 info = inf;
7103 htab = ppc_hash_table (info);
7104 if (htab == NULL)
7105 return FALSE;
7106
7107 /* Find the corresponding function descriptor symbol. */
7108 fdh = lookup_fdh (fh, htab);
7109
7110 /* Resolve undefined references to dot-symbols as the value
7111 in the function descriptor, if we have one in a regular object.
7112 This is to satisfy cases like ".quad .foo". Calls to functions
7113 in dynamic objects are handled elsewhere. */
7114 if ((fh->elf.root.type == bfd_link_hash_undefined
7115 || fh->elf.root.type == bfd_link_hash_undefweak)
7116 && (fdh->elf.root.type == bfd_link_hash_defined
7117 || fdh->elf.root.type == bfd_link_hash_defweak)
7118 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7119 && opd_entry_value (fdh->elf.root.u.def.section,
7120 fdh->elf.root.u.def.value,
7121 &fh->elf.root.u.def.section,
7122 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7123 {
7124 fh->elf.root.type = fdh->elf.root.type;
7125 fh->elf.forced_local = 1;
7126 fh->elf.def_regular = fdh->elf.def_regular;
7127 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7128 }
7129
7130 if (!fh->elf.dynamic)
7131 {
7132 struct plt_entry *ent;
7133
7134 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7135 if (ent->plt.refcount > 0)
7136 break;
7137 if (ent == NULL)
7138 return TRUE;
7139 }
7140
7141 /* Create a descriptor as undefined if necessary. */
7142 if (fdh == NULL
7143 && !bfd_link_executable (info)
7144 && (fh->elf.root.type == bfd_link_hash_undefined
7145 || fh->elf.root.type == bfd_link_hash_undefweak))
7146 {
7147 fdh = make_fdh (info, fh);
7148 if (fdh == NULL)
7149 return FALSE;
7150 }
7151
7152 /* We can't support overriding of symbols on a fake descriptor. */
7153 if (fdh != NULL
7154 && fdh->fake
7155 && (fh->elf.root.type == bfd_link_hash_defined
7156 || fh->elf.root.type == bfd_link_hash_defweak))
7157 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7158
7159 /* Transfer dynamic linking information to the function descriptor. */
7160 if (fdh != NULL)
7161 {
7162 fdh->elf.ref_regular |= fh->elf.ref_regular;
7163 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7164 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7165 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7166 fdh->elf.dynamic |= fh->elf.dynamic;
7167 fdh->elf.needs_plt |= (fh->elf.needs_plt
7168 || fh->elf.type == STT_FUNC
7169 || fh->elf.type == STT_GNU_IFUNC);
7170 move_plt_plist (fh, fdh);
7171
7172 if (!fdh->elf.forced_local
7173 && fh->elf.dynindx != -1)
7174 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7175 return FALSE;
7176 }
7177
7178 /* Now that the info is on the function descriptor, clear the
7179 function code sym info. Any function code syms for which we
7180 don't have a definition in a regular file, we force local.
7181 This prevents a shared library from exporting syms that have
7182 been imported from another library. Function code syms that
7183 are really in the library we must leave global to prevent the
7184 linker dragging in a definition from a static library. */
7185 force_local = (!fh->elf.def_regular
7186 || fdh == NULL
7187 || !fdh->elf.def_regular
7188 || fdh->elf.forced_local);
7189 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7190
7191 return TRUE;
7192 }
7193
7194 static const struct sfpr_def_parms save_res_funcs[] =
7195 {
7196 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7197 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7198 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7199 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7200 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7201 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7202 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7203 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7204 { "._savef", 14, 31, savefpr, savefpr1_tail },
7205 { "._restf", 14, 31, restfpr, restfpr1_tail },
7206 { "_savevr_", 20, 31, savevr, savevr_tail },
7207 { "_restvr_", 20, 31, restvr, restvr_tail }
7208 };
7209
7210 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7211 this hook to a) provide some gcc support functions, and b) transfer
7212 dynamic linking information gathered so far on function code symbol
7213 entries, to their corresponding function descriptor symbol entries. */
7214
7215 static bfd_boolean
7216 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7217 struct bfd_link_info *info)
7218 {
7219 struct ppc_link_hash_table *htab;
7220
7221 htab = ppc_hash_table (info);
7222 if (htab == NULL)
7223 return FALSE;
7224
7225 /* Provide any missing _save* and _rest* functions. */
7226 if (htab->sfpr != NULL)
7227 {
7228 unsigned int i;
7229
7230 htab->sfpr->size = 0;
7231 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7232 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7233 return FALSE;
7234 if (htab->sfpr->size == 0)
7235 htab->sfpr->flags |= SEC_EXCLUDE;
7236 }
7237
7238 if (bfd_link_relocatable (info))
7239 return TRUE;
7240
7241 if (htab->elf.hgot != NULL)
7242 {
7243 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7244 /* Make .TOC. defined so as to prevent it being made dynamic.
7245 The wrong value here is fixed later in ppc64_elf_set_toc. */
7246 if (!htab->elf.hgot->def_regular
7247 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7248 {
7249 htab->elf.hgot->root.type = bfd_link_hash_defined;
7250 htab->elf.hgot->root.u.def.value = 0;
7251 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7252 htab->elf.hgot->def_regular = 1;
7253 htab->elf.hgot->root.linker_def = 1;
7254 }
7255 htab->elf.hgot->type = STT_OBJECT;
7256 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7257 | STV_HIDDEN);
7258 }
7259
7260 if (htab->need_func_desc_adj)
7261 {
7262 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7263 htab->need_func_desc_adj = 0;
7264 }
7265
7266 return TRUE;
7267 }
7268
7269 /* Return true if we have dynamic relocs against H that apply to
7270 read-only sections. */
7271
7272 static bfd_boolean
7273 readonly_dynrelocs (struct elf_link_hash_entry *h)
7274 {
7275 struct ppc_link_hash_entry *eh;
7276 struct elf_dyn_relocs *p;
7277
7278 eh = (struct ppc_link_hash_entry *) h;
7279 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7280 {
7281 asection *s = p->sec->output_section;
7282
7283 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7284 return TRUE;
7285 }
7286 return FALSE;
7287 }
7288
7289 /* Return true if we have dynamic relocs against H or any of its weak
7290 aliases, that apply to read-only sections. */
7291
7292 static bfd_boolean
7293 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7294 {
7295 struct ppc_link_hash_entry *eh;
7296
7297 eh = (struct ppc_link_hash_entry *) h;
7298 do
7299 {
7300 if (readonly_dynrelocs (&eh->elf))
7301 return TRUE;
7302 eh = eh->weakref;
7303 } while (eh != NULL && &eh->elf != h);
7304
7305 return FALSE;
7306 }
7307
7308 /* Return whether EH has pc-relative dynamic relocs. */
7309
7310 static bfd_boolean
7311 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7312 {
7313 struct elf_dyn_relocs *p;
7314
7315 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7316 if (p->pc_count != 0)
7317 return TRUE;
7318 return FALSE;
7319 }
7320
7321 /* Return true if a global entry stub will be created for H. Valid
7322 for ELFv2 before plt entries have been allocated. */
7323
7324 static bfd_boolean
7325 global_entry_stub (struct elf_link_hash_entry *h)
7326 {
7327 struct plt_entry *pent;
7328
7329 if (!h->pointer_equality_needed
7330 || h->def_regular)
7331 return FALSE;
7332
7333 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7334 if (pent->plt.refcount > 0
7335 && pent->addend == 0)
7336 return TRUE;
7337
7338 return FALSE;
7339 }
7340
7341 /* Adjust a symbol defined by a dynamic object and referenced by a
7342 regular object. The current definition is in some section of the
7343 dynamic object, but we're not including those sections. We have to
7344 change the definition to something the rest of the link can
7345 understand. */
7346
7347 static bfd_boolean
7348 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7349 struct elf_link_hash_entry *h)
7350 {
7351 struct ppc_link_hash_table *htab;
7352 asection *s, *srel;
7353
7354 htab = ppc_hash_table (info);
7355 if (htab == NULL)
7356 return FALSE;
7357
7358 /* Deal with function syms. */
7359 if (h->type == STT_FUNC
7360 || h->type == STT_GNU_IFUNC
7361 || h->needs_plt)
7362 {
7363 /* Clear procedure linkage table information for any symbol that
7364 won't need a .plt entry. */
7365 struct plt_entry *ent;
7366 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7367 if (ent->plt.refcount > 0)
7368 break;
7369 if (ent == NULL
7370 || (h->type != STT_GNU_IFUNC
7371 && (SYMBOL_CALLS_LOCAL (info, h)
7372 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7373 || ((struct ppc_link_hash_entry *) h)->save_res)
7374 {
7375 h->plt.plist = NULL;
7376 h->needs_plt = 0;
7377 h->pointer_equality_needed = 0;
7378 }
7379 else if (abiversion (info->output_bfd) >= 2)
7380 {
7381 /* Taking a function's address in a read/write section
7382 doesn't require us to define the function symbol in the
7383 executable on a global entry stub. A dynamic reloc can
7384 be used instead. The reason we prefer a few more dynamic
7385 relocs is that calling via a global entry stub costs a
7386 few more instructions, and pointer_equality_needed causes
7387 extra work in ld.so when resolving these symbols. */
7388 if (global_entry_stub (h)
7389 && !alias_readonly_dynrelocs (h))
7390 {
7391 h->pointer_equality_needed = 0;
7392 /* After adjust_dynamic_symbol, non_got_ref set in
7393 the non-pic case means that dyn_relocs for this
7394 symbol should be discarded. */
7395 h->non_got_ref = 0;
7396 }
7397
7398 /* If making a plt entry, then we don't need copy relocs. */
7399 return TRUE;
7400 }
7401 }
7402 else
7403 h->plt.plist = NULL;
7404
7405 /* If this is a weak symbol, and there is a real definition, the
7406 processor independent code will have arranged for us to see the
7407 real definition first, and we can just use the same value. */
7408 if (h->u.weakdef != NULL)
7409 {
7410 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7411 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7412 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7413 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7414 if (ELIMINATE_COPY_RELOCS)
7415 h->non_got_ref = h->u.weakdef->non_got_ref;
7416 return TRUE;
7417 }
7418
7419 /* If we are creating a shared library, we must presume that the
7420 only references to the symbol are via the global offset table.
7421 For such cases we need not do anything here; the relocations will
7422 be handled correctly by relocate_section. */
7423 if (bfd_link_pic (info))
7424 return TRUE;
7425
7426 /* If there are no references to this symbol that do not use the
7427 GOT, we don't need to generate a copy reloc. */
7428 if (!h->non_got_ref)
7429 return TRUE;
7430
7431 /* Don't generate a copy reloc for symbols defined in the executable. */
7432 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7433
7434 /* If -z nocopyreloc was given, don't generate them either. */
7435 || info->nocopyreloc
7436
7437 /* If we didn't find any dynamic relocs in read-only sections, then
7438 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7439 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7440
7441 /* Protected variables do not work with .dynbss. The copy in
7442 .dynbss won't be used by the shared library with the protected
7443 definition for the variable. Text relocations are preferable
7444 to an incorrect program. */
7445 || h->protected_def)
7446 {
7447 h->non_got_ref = 0;
7448 return TRUE;
7449 }
7450
7451 if (h->plt.plist != NULL)
7452 {
7453 /* We should never get here, but unfortunately there are versions
7454 of gcc out there that improperly (for this ABI) put initialized
7455 function pointers, vtable refs and suchlike in read-only
7456 sections. Allow them to proceed, but warn that this might
7457 break at runtime. */
7458 info->callbacks->einfo
7459 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7460 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7461 h->root.root.string);
7462 }
7463
7464 /* This is a reference to a symbol defined by a dynamic object which
7465 is not a function. */
7466
7467 /* We must allocate the symbol in our .dynbss section, which will
7468 become part of the .bss section of the executable. There will be
7469 an entry for this symbol in the .dynsym section. The dynamic
7470 object will contain position independent code, so all references
7471 from the dynamic object to this symbol will go through the global
7472 offset table. The dynamic linker will use the .dynsym entry to
7473 determine the address it must put in the global offset table, so
7474 both the dynamic object and the regular object will refer to the
7475 same memory location for the variable. */
7476
7477 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7478 to copy the initial value out of the dynamic object and into the
7479 runtime process image. We need to remember the offset into the
7480 .rela.bss section we are going to use. */
7481 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7482 {
7483 s = htab->elf.sdynrelro;
7484 srel = htab->elf.sreldynrelro;
7485 }
7486 else
7487 {
7488 s = htab->elf.sdynbss;
7489 srel = htab->elf.srelbss;
7490 }
7491 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7492 {
7493 srel->size += sizeof (Elf64_External_Rela);
7494 h->needs_copy = 1;
7495 }
7496
7497 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7498 }
7499
7500 /* If given a function descriptor symbol, hide both the function code
7501 sym and the descriptor. */
7502 static void
7503 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7504 struct elf_link_hash_entry *h,
7505 bfd_boolean force_local)
7506 {
7507 struct ppc_link_hash_entry *eh;
7508 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7509
7510 eh = (struct ppc_link_hash_entry *) h;
7511 if (eh->is_func_descriptor)
7512 {
7513 struct ppc_link_hash_entry *fh = eh->oh;
7514
7515 if (fh == NULL)
7516 {
7517 const char *p, *q;
7518 struct elf_link_hash_table *htab = elf_hash_table (info);
7519 char save;
7520
7521 /* We aren't supposed to use alloca in BFD because on
7522 systems which do not have alloca the version in libiberty
7523 calls xmalloc, which might cause the program to crash
7524 when it runs out of memory. This function doesn't have a
7525 return status, so there's no way to gracefully return an
7526 error. So cheat. We know that string[-1] can be safely
7527 accessed; It's either a string in an ELF string table,
7528 or allocated in an objalloc structure. */
7529
7530 p = eh->elf.root.root.string - 1;
7531 save = *p;
7532 *(char *) p = '.';
7533 fh = (struct ppc_link_hash_entry *)
7534 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7535 *(char *) p = save;
7536
7537 /* Unfortunately, if it so happens that the string we were
7538 looking for was allocated immediately before this string,
7539 then we overwrote the string terminator. That's the only
7540 reason the lookup should fail. */
7541 if (fh == NULL)
7542 {
7543 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7544 while (q >= eh->elf.root.root.string && *q == *p)
7545 --q, --p;
7546 if (q < eh->elf.root.root.string && *p == '.')
7547 fh = (struct ppc_link_hash_entry *)
7548 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7549 }
7550 if (fh != NULL)
7551 {
7552 eh->oh = fh;
7553 fh->oh = eh;
7554 }
7555 }
7556 if (fh != NULL)
7557 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7558 }
7559 }
7560
7561 static bfd_boolean
7562 get_sym_h (struct elf_link_hash_entry **hp,
7563 Elf_Internal_Sym **symp,
7564 asection **symsecp,
7565 unsigned char **tls_maskp,
7566 Elf_Internal_Sym **locsymsp,
7567 unsigned long r_symndx,
7568 bfd *ibfd)
7569 {
7570 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7571
7572 if (r_symndx >= symtab_hdr->sh_info)
7573 {
7574 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7575 struct elf_link_hash_entry *h;
7576
7577 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7578 h = elf_follow_link (h);
7579
7580 if (hp != NULL)
7581 *hp = h;
7582
7583 if (symp != NULL)
7584 *symp = NULL;
7585
7586 if (symsecp != NULL)
7587 {
7588 asection *symsec = NULL;
7589 if (h->root.type == bfd_link_hash_defined
7590 || h->root.type == bfd_link_hash_defweak)
7591 symsec = h->root.u.def.section;
7592 *symsecp = symsec;
7593 }
7594
7595 if (tls_maskp != NULL)
7596 {
7597 struct ppc_link_hash_entry *eh;
7598
7599 eh = (struct ppc_link_hash_entry *) h;
7600 *tls_maskp = &eh->tls_mask;
7601 }
7602 }
7603 else
7604 {
7605 Elf_Internal_Sym *sym;
7606 Elf_Internal_Sym *locsyms = *locsymsp;
7607
7608 if (locsyms == NULL)
7609 {
7610 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7611 if (locsyms == NULL)
7612 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7613 symtab_hdr->sh_info,
7614 0, NULL, NULL, NULL);
7615 if (locsyms == NULL)
7616 return FALSE;
7617 *locsymsp = locsyms;
7618 }
7619 sym = locsyms + r_symndx;
7620
7621 if (hp != NULL)
7622 *hp = NULL;
7623
7624 if (symp != NULL)
7625 *symp = sym;
7626
7627 if (symsecp != NULL)
7628 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7629
7630 if (tls_maskp != NULL)
7631 {
7632 struct got_entry **lgot_ents;
7633 unsigned char *tls_mask;
7634
7635 tls_mask = NULL;
7636 lgot_ents = elf_local_got_ents (ibfd);
7637 if (lgot_ents != NULL)
7638 {
7639 struct plt_entry **local_plt = (struct plt_entry **)
7640 (lgot_ents + symtab_hdr->sh_info);
7641 unsigned char *lgot_masks = (unsigned char *)
7642 (local_plt + symtab_hdr->sh_info);
7643 tls_mask = &lgot_masks[r_symndx];
7644 }
7645 *tls_maskp = tls_mask;
7646 }
7647 }
7648 return TRUE;
7649 }
7650
7651 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7652 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7653 type suitable for optimization, and 1 otherwise. */
7654
7655 static int
7656 get_tls_mask (unsigned char **tls_maskp,
7657 unsigned long *toc_symndx,
7658 bfd_vma *toc_addend,
7659 Elf_Internal_Sym **locsymsp,
7660 const Elf_Internal_Rela *rel,
7661 bfd *ibfd)
7662 {
7663 unsigned long r_symndx;
7664 int next_r;
7665 struct elf_link_hash_entry *h;
7666 Elf_Internal_Sym *sym;
7667 asection *sec;
7668 bfd_vma off;
7669
7670 r_symndx = ELF64_R_SYM (rel->r_info);
7671 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7672 return 0;
7673
7674 if ((*tls_maskp != NULL && **tls_maskp != 0)
7675 || sec == NULL
7676 || ppc64_elf_section_data (sec) == NULL
7677 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7678 return 1;
7679
7680 /* Look inside a TOC section too. */
7681 if (h != NULL)
7682 {
7683 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7684 off = h->root.u.def.value;
7685 }
7686 else
7687 off = sym->st_value;
7688 off += rel->r_addend;
7689 BFD_ASSERT (off % 8 == 0);
7690 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7691 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7692 if (toc_symndx != NULL)
7693 *toc_symndx = r_symndx;
7694 if (toc_addend != NULL)
7695 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7696 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7697 return 0;
7698 if ((h == NULL || is_static_defined (h))
7699 && (next_r == -1 || next_r == -2))
7700 return 1 - next_r;
7701 return 1;
7702 }
7703
7704 /* Find (or create) an entry in the tocsave hash table. */
7705
7706 static struct tocsave_entry *
7707 tocsave_find (struct ppc_link_hash_table *htab,
7708 enum insert_option insert,
7709 Elf_Internal_Sym **local_syms,
7710 const Elf_Internal_Rela *irela,
7711 bfd *ibfd)
7712 {
7713 unsigned long r_indx;
7714 struct elf_link_hash_entry *h;
7715 Elf_Internal_Sym *sym;
7716 struct tocsave_entry ent, *p;
7717 hashval_t hash;
7718 struct tocsave_entry **slot;
7719
7720 r_indx = ELF64_R_SYM (irela->r_info);
7721 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7722 return NULL;
7723 if (ent.sec == NULL || ent.sec->output_section == NULL)
7724 {
7725 _bfd_error_handler
7726 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7727 return NULL;
7728 }
7729
7730 if (h != NULL)
7731 ent.offset = h->root.u.def.value;
7732 else
7733 ent.offset = sym->st_value;
7734 ent.offset += irela->r_addend;
7735
7736 hash = tocsave_htab_hash (&ent);
7737 slot = ((struct tocsave_entry **)
7738 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7739 if (slot == NULL)
7740 return NULL;
7741
7742 if (*slot == NULL)
7743 {
7744 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7745 if (p == NULL)
7746 return NULL;
7747 *p = ent;
7748 *slot = p;
7749 }
7750 return *slot;
7751 }
7752
7753 /* Adjust all global syms defined in opd sections. In gcc generated
7754 code for the old ABI, these will already have been done. */
7755
7756 static bfd_boolean
7757 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7758 {
7759 struct ppc_link_hash_entry *eh;
7760 asection *sym_sec;
7761 struct _opd_sec_data *opd;
7762
7763 if (h->root.type == bfd_link_hash_indirect)
7764 return TRUE;
7765
7766 if (h->root.type != bfd_link_hash_defined
7767 && h->root.type != bfd_link_hash_defweak)
7768 return TRUE;
7769
7770 eh = (struct ppc_link_hash_entry *) h;
7771 if (eh->adjust_done)
7772 return TRUE;
7773
7774 sym_sec = eh->elf.root.u.def.section;
7775 opd = get_opd_info (sym_sec);
7776 if (opd != NULL && opd->adjust != NULL)
7777 {
7778 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7779 if (adjust == -1)
7780 {
7781 /* This entry has been deleted. */
7782 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7783 if (dsec == NULL)
7784 {
7785 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7786 if (discarded_section (dsec))
7787 {
7788 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7789 break;
7790 }
7791 }
7792 eh->elf.root.u.def.value = 0;
7793 eh->elf.root.u.def.section = dsec;
7794 }
7795 else
7796 eh->elf.root.u.def.value += adjust;
7797 eh->adjust_done = 1;
7798 }
7799 return TRUE;
7800 }
7801
7802 /* Handles decrementing dynamic reloc counts for the reloc specified by
7803 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7804 have already been determined. */
7805
7806 static bfd_boolean
7807 dec_dynrel_count (bfd_vma r_info,
7808 asection *sec,
7809 struct bfd_link_info *info,
7810 Elf_Internal_Sym **local_syms,
7811 struct elf_link_hash_entry *h,
7812 Elf_Internal_Sym *sym)
7813 {
7814 enum elf_ppc64_reloc_type r_type;
7815 asection *sym_sec = NULL;
7816
7817 /* Can this reloc be dynamic? This switch, and later tests here
7818 should be kept in sync with the code in check_relocs. */
7819 r_type = ELF64_R_TYPE (r_info);
7820 switch (r_type)
7821 {
7822 default:
7823 return TRUE;
7824
7825 case R_PPC64_TPREL16:
7826 case R_PPC64_TPREL16_LO:
7827 case R_PPC64_TPREL16_HI:
7828 case R_PPC64_TPREL16_HA:
7829 case R_PPC64_TPREL16_DS:
7830 case R_PPC64_TPREL16_LO_DS:
7831 case R_PPC64_TPREL16_HIGH:
7832 case R_PPC64_TPREL16_HIGHA:
7833 case R_PPC64_TPREL16_HIGHER:
7834 case R_PPC64_TPREL16_HIGHERA:
7835 case R_PPC64_TPREL16_HIGHEST:
7836 case R_PPC64_TPREL16_HIGHESTA:
7837 case R_PPC64_TPREL64:
7838 case R_PPC64_DTPMOD64:
7839 case R_PPC64_DTPREL64:
7840 case R_PPC64_ADDR64:
7841 case R_PPC64_REL30:
7842 case R_PPC64_REL32:
7843 case R_PPC64_REL64:
7844 case R_PPC64_ADDR14:
7845 case R_PPC64_ADDR14_BRNTAKEN:
7846 case R_PPC64_ADDR14_BRTAKEN:
7847 case R_PPC64_ADDR16:
7848 case R_PPC64_ADDR16_DS:
7849 case R_PPC64_ADDR16_HA:
7850 case R_PPC64_ADDR16_HI:
7851 case R_PPC64_ADDR16_HIGH:
7852 case R_PPC64_ADDR16_HIGHA:
7853 case R_PPC64_ADDR16_HIGHER:
7854 case R_PPC64_ADDR16_HIGHERA:
7855 case R_PPC64_ADDR16_HIGHEST:
7856 case R_PPC64_ADDR16_HIGHESTA:
7857 case R_PPC64_ADDR16_LO:
7858 case R_PPC64_ADDR16_LO_DS:
7859 case R_PPC64_ADDR24:
7860 case R_PPC64_ADDR32:
7861 case R_PPC64_UADDR16:
7862 case R_PPC64_UADDR32:
7863 case R_PPC64_UADDR64:
7864 case R_PPC64_TOC:
7865 break;
7866 }
7867
7868 if (local_syms != NULL)
7869 {
7870 unsigned long r_symndx;
7871 bfd *ibfd = sec->owner;
7872
7873 r_symndx = ELF64_R_SYM (r_info);
7874 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7875 return FALSE;
7876 }
7877
7878 if ((bfd_link_pic (info)
7879 && (must_be_dyn_reloc (info, r_type)
7880 || (h != NULL
7881 && (!SYMBOLIC_BIND (info, h)
7882 || h->root.type == bfd_link_hash_defweak
7883 || !h->def_regular))))
7884 || (ELIMINATE_COPY_RELOCS
7885 && !bfd_link_pic (info)
7886 && h != NULL
7887 && (h->root.type == bfd_link_hash_defweak
7888 || !h->def_regular)))
7889 ;
7890 else
7891 return TRUE;
7892
7893 if (h != NULL)
7894 {
7895 struct elf_dyn_relocs *p;
7896 struct elf_dyn_relocs **pp;
7897 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7898
7899 /* elf_gc_sweep may have already removed all dyn relocs associated
7900 with local syms for a given section. Also, symbol flags are
7901 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7902 report a dynreloc miscount. */
7903 if (*pp == NULL && info->gc_sections)
7904 return TRUE;
7905
7906 while ((p = *pp) != NULL)
7907 {
7908 if (p->sec == sec)
7909 {
7910 if (!must_be_dyn_reloc (info, r_type))
7911 p->pc_count -= 1;
7912 p->count -= 1;
7913 if (p->count == 0)
7914 *pp = p->next;
7915 return TRUE;
7916 }
7917 pp = &p->next;
7918 }
7919 }
7920 else
7921 {
7922 struct ppc_dyn_relocs *p;
7923 struct ppc_dyn_relocs **pp;
7924 void *vpp;
7925 bfd_boolean is_ifunc;
7926
7927 if (local_syms == NULL)
7928 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7929 if (sym_sec == NULL)
7930 sym_sec = sec;
7931
7932 vpp = &elf_section_data (sym_sec)->local_dynrel;
7933 pp = (struct ppc_dyn_relocs **) vpp;
7934
7935 if (*pp == NULL && info->gc_sections)
7936 return TRUE;
7937
7938 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7939 while ((p = *pp) != NULL)
7940 {
7941 if (p->sec == sec && p->ifunc == is_ifunc)
7942 {
7943 p->count -= 1;
7944 if (p->count == 0)
7945 *pp = p->next;
7946 return TRUE;
7947 }
7948 pp = &p->next;
7949 }
7950 }
7951
7952 /* xgettext:c-format */
7953 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7954 sec->owner, sec);
7955 bfd_set_error (bfd_error_bad_value);
7956 return FALSE;
7957 }
7958
7959 /* Remove unused Official Procedure Descriptor entries. Currently we
7960 only remove those associated with functions in discarded link-once
7961 sections, or weakly defined functions that have been overridden. It
7962 would be possible to remove many more entries for statically linked
7963 applications. */
7964
7965 bfd_boolean
7966 ppc64_elf_edit_opd (struct bfd_link_info *info)
7967 {
7968 bfd *ibfd;
7969 bfd_boolean some_edited = FALSE;
7970 asection *need_pad = NULL;
7971 struct ppc_link_hash_table *htab;
7972
7973 htab = ppc_hash_table (info);
7974 if (htab == NULL)
7975 return FALSE;
7976
7977 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7978 {
7979 asection *sec;
7980 Elf_Internal_Rela *relstart, *rel, *relend;
7981 Elf_Internal_Shdr *symtab_hdr;
7982 Elf_Internal_Sym *local_syms;
7983 struct _opd_sec_data *opd;
7984 bfd_boolean need_edit, add_aux_fields, broken;
7985 bfd_size_type cnt_16b = 0;
7986
7987 if (!is_ppc64_elf (ibfd))
7988 continue;
7989
7990 sec = bfd_get_section_by_name (ibfd, ".opd");
7991 if (sec == NULL || sec->size == 0)
7992 continue;
7993
7994 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7995 continue;
7996
7997 if (sec->output_section == bfd_abs_section_ptr)
7998 continue;
7999
8000 /* Look through the section relocs. */
8001 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
8002 continue;
8003
8004 local_syms = NULL;
8005 symtab_hdr = &elf_symtab_hdr (ibfd);
8006
8007 /* Read the relocations. */
8008 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8009 info->keep_memory);
8010 if (relstart == NULL)
8011 return FALSE;
8012
8013 /* First run through the relocs to check they are sane, and to
8014 determine whether we need to edit this opd section. */
8015 need_edit = FALSE;
8016 broken = FALSE;
8017 need_pad = sec;
8018 relend = relstart + sec->reloc_count;
8019 for (rel = relstart; rel < relend; )
8020 {
8021 enum elf_ppc64_reloc_type r_type;
8022 unsigned long r_symndx;
8023 asection *sym_sec;
8024 struct elf_link_hash_entry *h;
8025 Elf_Internal_Sym *sym;
8026 bfd_vma offset;
8027
8028 /* .opd contains an array of 16 or 24 byte entries. We're
8029 only interested in the reloc pointing to a function entry
8030 point. */
8031 offset = rel->r_offset;
8032 if (rel + 1 == relend
8033 || rel[1].r_offset != offset + 8)
8034 {
8035 /* If someone messes with .opd alignment then after a
8036 "ld -r" we might have padding in the middle of .opd.
8037 Also, there's nothing to prevent someone putting
8038 something silly in .opd with the assembler. No .opd
8039 optimization for them! */
8040 broken_opd:
8041 _bfd_error_handler
8042 (_("%B: .opd is not a regular array of opd entries"), ibfd);
8043 broken = TRUE;
8044 break;
8045 }
8046
8047 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
8048 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
8049 {
8050 _bfd_error_handler
8051 /* xgettext:c-format */
8052 (_("%B: unexpected reloc type %u in .opd section"),
8053 ibfd, r_type);
8054 broken = TRUE;
8055 break;
8056 }
8057
8058 r_symndx = ELF64_R_SYM (rel->r_info);
8059 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8060 r_symndx, ibfd))
8061 goto error_ret;
8062
8063 if (sym_sec == NULL || sym_sec->owner == NULL)
8064 {
8065 const char *sym_name;
8066 if (h != NULL)
8067 sym_name = h->root.root.string;
8068 else
8069 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8070 sym_sec);
8071
8072 _bfd_error_handler
8073 /* xgettext:c-format */
8074 (_("%B: undefined sym `%s' in .opd section"),
8075 ibfd, sym_name);
8076 broken = TRUE;
8077 break;
8078 }
8079
8080 /* opd entries are always for functions defined in the
8081 current input bfd. If the symbol isn't defined in the
8082 input bfd, then we won't be using the function in this
8083 bfd; It must be defined in a linkonce section in another
8084 bfd, or is weak. It's also possible that we are
8085 discarding the function due to a linker script /DISCARD/,
8086 which we test for via the output_section. */
8087 if (sym_sec->owner != ibfd
8088 || sym_sec->output_section == bfd_abs_section_ptr)
8089 need_edit = TRUE;
8090
8091 rel += 2;
8092 if (rel + 1 == relend
8093 || (rel + 2 < relend
8094 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8095 ++rel;
8096
8097 if (rel == relend)
8098 {
8099 if (sec->size == offset + 24)
8100 {
8101 need_pad = NULL;
8102 break;
8103 }
8104 if (sec->size == offset + 16)
8105 {
8106 cnt_16b++;
8107 break;
8108 }
8109 goto broken_opd;
8110 }
8111 else if (rel + 1 < relend
8112 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8113 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8114 {
8115 if (rel[0].r_offset == offset + 16)
8116 cnt_16b++;
8117 else if (rel[0].r_offset != offset + 24)
8118 goto broken_opd;
8119 }
8120 else
8121 goto broken_opd;
8122 }
8123
8124 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8125
8126 if (!broken && (need_edit || add_aux_fields))
8127 {
8128 Elf_Internal_Rela *write_rel;
8129 Elf_Internal_Shdr *rel_hdr;
8130 bfd_byte *rptr, *wptr;
8131 bfd_byte *new_contents;
8132 bfd_size_type amt;
8133
8134 new_contents = NULL;
8135 amt = OPD_NDX (sec->size) * sizeof (long);
8136 opd = &ppc64_elf_section_data (sec)->u.opd;
8137 opd->adjust = bfd_zalloc (sec->owner, amt);
8138 if (opd->adjust == NULL)
8139 return FALSE;
8140
8141 /* This seems a waste of time as input .opd sections are all
8142 zeros as generated by gcc, but I suppose there's no reason
8143 this will always be so. We might start putting something in
8144 the third word of .opd entries. */
8145 if ((sec->flags & SEC_IN_MEMORY) == 0)
8146 {
8147 bfd_byte *loc;
8148 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8149 {
8150 if (loc != NULL)
8151 free (loc);
8152 error_ret:
8153 if (local_syms != NULL
8154 && symtab_hdr->contents != (unsigned char *) local_syms)
8155 free (local_syms);
8156 if (elf_section_data (sec)->relocs != relstart)
8157 free (relstart);
8158 return FALSE;
8159 }
8160 sec->contents = loc;
8161 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8162 }
8163
8164 elf_section_data (sec)->relocs = relstart;
8165
8166 new_contents = sec->contents;
8167 if (add_aux_fields)
8168 {
8169 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8170 if (new_contents == NULL)
8171 return FALSE;
8172 need_pad = NULL;
8173 }
8174 wptr = new_contents;
8175 rptr = sec->contents;
8176 write_rel = relstart;
8177 for (rel = relstart; rel < relend; )
8178 {
8179 unsigned long r_symndx;
8180 asection *sym_sec;
8181 struct elf_link_hash_entry *h;
8182 struct ppc_link_hash_entry *fdh = NULL;
8183 Elf_Internal_Sym *sym;
8184 long opd_ent_size;
8185 Elf_Internal_Rela *next_rel;
8186 bfd_boolean skip;
8187
8188 r_symndx = ELF64_R_SYM (rel->r_info);
8189 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8190 r_symndx, ibfd))
8191 goto error_ret;
8192
8193 next_rel = rel + 2;
8194 if (next_rel + 1 == relend
8195 || (next_rel + 2 < relend
8196 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8197 ++next_rel;
8198
8199 /* See if the .opd entry is full 24 byte or
8200 16 byte (with fd_aux entry overlapped with next
8201 fd_func). */
8202 opd_ent_size = 24;
8203 if (next_rel == relend)
8204 {
8205 if (sec->size == rel->r_offset + 16)
8206 opd_ent_size = 16;
8207 }
8208 else if (next_rel->r_offset == rel->r_offset + 16)
8209 opd_ent_size = 16;
8210
8211 if (h != NULL
8212 && h->root.root.string[0] == '.')
8213 {
8214 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8215 if (fdh != NULL)
8216 {
8217 fdh = ppc_follow_link (fdh);
8218 if (fdh->elf.root.type != bfd_link_hash_defined
8219 && fdh->elf.root.type != bfd_link_hash_defweak)
8220 fdh = NULL;
8221 }
8222 }
8223
8224 skip = (sym_sec->owner != ibfd
8225 || sym_sec->output_section == bfd_abs_section_ptr);
8226 if (skip)
8227 {
8228 if (fdh != NULL && sym_sec->owner == ibfd)
8229 {
8230 /* Arrange for the function descriptor sym
8231 to be dropped. */
8232 fdh->elf.root.u.def.value = 0;
8233 fdh->elf.root.u.def.section = sym_sec;
8234 }
8235 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8236
8237 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8238 rel = next_rel;
8239 else
8240 while (1)
8241 {
8242 if (!dec_dynrel_count (rel->r_info, sec, info,
8243 NULL, h, sym))
8244 goto error_ret;
8245
8246 if (++rel == next_rel)
8247 break;
8248
8249 r_symndx = ELF64_R_SYM (rel->r_info);
8250 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8251 r_symndx, ibfd))
8252 goto error_ret;
8253 }
8254 }
8255 else
8256 {
8257 /* We'll be keeping this opd entry. */
8258 long adjust;
8259
8260 if (fdh != NULL)
8261 {
8262 /* Redefine the function descriptor symbol to
8263 this location in the opd section. It is
8264 necessary to update the value here rather
8265 than using an array of adjustments as we do
8266 for local symbols, because various places
8267 in the generic ELF code use the value
8268 stored in u.def.value. */
8269 fdh->elf.root.u.def.value = wptr - new_contents;
8270 fdh->adjust_done = 1;
8271 }
8272
8273 /* Local syms are a bit tricky. We could
8274 tweak them as they can be cached, but
8275 we'd need to look through the local syms
8276 for the function descriptor sym which we
8277 don't have at the moment. So keep an
8278 array of adjustments. */
8279 adjust = (wptr - new_contents) - (rptr - sec->contents);
8280 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8281
8282 if (wptr != rptr)
8283 memcpy (wptr, rptr, opd_ent_size);
8284 wptr += opd_ent_size;
8285 if (add_aux_fields && opd_ent_size == 16)
8286 {
8287 memset (wptr, '\0', 8);
8288 wptr += 8;
8289 }
8290
8291 /* We need to adjust any reloc offsets to point to the
8292 new opd entries. */
8293 for ( ; rel != next_rel; ++rel)
8294 {
8295 rel->r_offset += adjust;
8296 if (write_rel != rel)
8297 memcpy (write_rel, rel, sizeof (*rel));
8298 ++write_rel;
8299 }
8300 }
8301
8302 rptr += opd_ent_size;
8303 }
8304
8305 sec->size = wptr - new_contents;
8306 sec->reloc_count = write_rel - relstart;
8307 if (add_aux_fields)
8308 {
8309 free (sec->contents);
8310 sec->contents = new_contents;
8311 }
8312
8313 /* Fudge the header size too, as this is used later in
8314 elf_bfd_final_link if we are emitting relocs. */
8315 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8316 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8317 some_edited = TRUE;
8318 }
8319 else if (elf_section_data (sec)->relocs != relstart)
8320 free (relstart);
8321
8322 if (local_syms != NULL
8323 && symtab_hdr->contents != (unsigned char *) local_syms)
8324 {
8325 if (!info->keep_memory)
8326 free (local_syms);
8327 else
8328 symtab_hdr->contents = (unsigned char *) local_syms;
8329 }
8330 }
8331
8332 if (some_edited)
8333 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8334
8335 /* If we are doing a final link and the last .opd entry is just 16 byte
8336 long, add a 8 byte padding after it. */
8337 if (need_pad != NULL && !bfd_link_relocatable (info))
8338 {
8339 bfd_byte *p;
8340
8341 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8342 {
8343 BFD_ASSERT (need_pad->size > 0);
8344
8345 p = bfd_malloc (need_pad->size + 8);
8346 if (p == NULL)
8347 return FALSE;
8348
8349 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8350 p, 0, need_pad->size))
8351 return FALSE;
8352
8353 need_pad->contents = p;
8354 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8355 }
8356 else
8357 {
8358 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8359 if (p == NULL)
8360 return FALSE;
8361
8362 need_pad->contents = p;
8363 }
8364
8365 memset (need_pad->contents + need_pad->size, 0, 8);
8366 need_pad->size += 8;
8367 }
8368
8369 return TRUE;
8370 }
8371
8372 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8373
8374 asection *
8375 ppc64_elf_tls_setup (struct bfd_link_info *info)
8376 {
8377 struct ppc_link_hash_table *htab;
8378
8379 htab = ppc_hash_table (info);
8380 if (htab == NULL)
8381 return NULL;
8382
8383 if (abiversion (info->output_bfd) == 1)
8384 htab->opd_abi = 1;
8385
8386 if (htab->params->no_multi_toc)
8387 htab->do_multi_toc = 0;
8388 else if (!htab->do_multi_toc)
8389 htab->params->no_multi_toc = 1;
8390
8391 /* Default to --no-plt-localentry, as this option can cause problems
8392 with symbol interposition. For example, glibc libpthread.so and
8393 libc.so duplicate many pthread symbols, with a fallback
8394 implementation in libc.so. In some cases the fallback does more
8395 work than the pthread implementation. __pthread_condattr_destroy
8396 is one such symbol: the libpthread.so implementation is
8397 localentry:0 while the libc.so implementation is localentry:8.
8398 An app that "cleverly" uses dlopen to only load necessary
8399 libraries at runtime may omit loading libpthread.so when not
8400 running multi-threaded, which then results in the libc.so
8401 fallback symbols being used and ld.so complaining. Now there
8402 are workarounds in ld (see non_zero_localentry) to detect the
8403 pthread situation, but that may not be the only case where
8404 --plt-localentry can cause trouble. */
8405 if (htab->params->plt_localentry0 < 0)
8406 htab->params->plt_localentry0 = 0;
8407 if (htab->params->plt_localentry0
8408 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8409 FALSE, FALSE, FALSE) == NULL)
8410 info->callbacks->einfo
8411 (_("%P: warning: --plt-localentry is especially dangerous without "
8412 "ld.so support to detect ABI violations.\n"));
8413
8414 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8415 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8416 FALSE, FALSE, TRUE));
8417 /* Move dynamic linking info to the function descriptor sym. */
8418 if (htab->tls_get_addr != NULL)
8419 func_desc_adjust (&htab->tls_get_addr->elf, info);
8420 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8421 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8422 FALSE, FALSE, TRUE));
8423 if (htab->params->tls_get_addr_opt)
8424 {
8425 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8426
8427 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8428 FALSE, FALSE, TRUE);
8429 if (opt != NULL)
8430 func_desc_adjust (opt, info);
8431 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8432 FALSE, FALSE, TRUE);
8433 if (opt_fd != NULL
8434 && (opt_fd->root.type == bfd_link_hash_defined
8435 || opt_fd->root.type == bfd_link_hash_defweak))
8436 {
8437 /* If glibc supports an optimized __tls_get_addr call stub,
8438 signalled by the presence of __tls_get_addr_opt, and we'll
8439 be calling __tls_get_addr via a plt call stub, then
8440 make __tls_get_addr point to __tls_get_addr_opt. */
8441 tga_fd = &htab->tls_get_addr_fd->elf;
8442 if (htab->elf.dynamic_sections_created
8443 && tga_fd != NULL
8444 && (tga_fd->type == STT_FUNC
8445 || tga_fd->needs_plt)
8446 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8447 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8448 {
8449 struct plt_entry *ent;
8450
8451 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8452 if (ent->plt.refcount > 0)
8453 break;
8454 if (ent != NULL)
8455 {
8456 tga_fd->root.type = bfd_link_hash_indirect;
8457 tga_fd->root.u.i.link = &opt_fd->root;
8458 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8459 opt_fd->mark = 1;
8460 if (opt_fd->dynindx != -1)
8461 {
8462 /* Use __tls_get_addr_opt in dynamic relocations. */
8463 opt_fd->dynindx = -1;
8464 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8465 opt_fd->dynstr_index);
8466 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8467 return NULL;
8468 }
8469 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8470 tga = &htab->tls_get_addr->elf;
8471 if (opt != NULL && tga != NULL)
8472 {
8473 tga->root.type = bfd_link_hash_indirect;
8474 tga->root.u.i.link = &opt->root;
8475 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8476 opt->mark = 1;
8477 _bfd_elf_link_hash_hide_symbol (info, opt,
8478 tga->forced_local);
8479 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8480 }
8481 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8482 htab->tls_get_addr_fd->is_func_descriptor = 1;
8483 if (htab->tls_get_addr != NULL)
8484 {
8485 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8486 htab->tls_get_addr->is_func = 1;
8487 }
8488 }
8489 }
8490 }
8491 else if (htab->params->tls_get_addr_opt < 0)
8492 htab->params->tls_get_addr_opt = 0;
8493 }
8494 return _bfd_elf_tls_setup (info->output_bfd, info);
8495 }
8496
8497 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8498 HASH1 or HASH2. */
8499
8500 static bfd_boolean
8501 branch_reloc_hash_match (const bfd *ibfd,
8502 const Elf_Internal_Rela *rel,
8503 const struct ppc_link_hash_entry *hash1,
8504 const struct ppc_link_hash_entry *hash2)
8505 {
8506 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8507 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8508 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8509
8510 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8511 {
8512 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8513 struct elf_link_hash_entry *h;
8514
8515 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8516 h = elf_follow_link (h);
8517 if (h == &hash1->elf || h == &hash2->elf)
8518 return TRUE;
8519 }
8520 return FALSE;
8521 }
8522
8523 /* Run through all the TLS relocs looking for optimization
8524 opportunities. The linker has been hacked (see ppc64elf.em) to do
8525 a preliminary section layout so that we know the TLS segment
8526 offsets. We can't optimize earlier because some optimizations need
8527 to know the tp offset, and we need to optimize before allocating
8528 dynamic relocations. */
8529
8530 bfd_boolean
8531 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8532 {
8533 bfd *ibfd;
8534 asection *sec;
8535 struct ppc_link_hash_table *htab;
8536 unsigned char *toc_ref;
8537 int pass;
8538
8539 if (!bfd_link_executable (info))
8540 return TRUE;
8541
8542 htab = ppc_hash_table (info);
8543 if (htab == NULL)
8544 return FALSE;
8545
8546 /* Make two passes over the relocs. On the first pass, mark toc
8547 entries involved with tls relocs, and check that tls relocs
8548 involved in setting up a tls_get_addr call are indeed followed by
8549 such a call. If they are not, we can't do any tls optimization.
8550 On the second pass twiddle tls_mask flags to notify
8551 relocate_section that optimization can be done, and adjust got
8552 and plt refcounts. */
8553 toc_ref = NULL;
8554 for (pass = 0; pass < 2; ++pass)
8555 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8556 {
8557 Elf_Internal_Sym *locsyms = NULL;
8558 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8559
8560 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8561 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8562 {
8563 Elf_Internal_Rela *relstart, *rel, *relend;
8564 bfd_boolean found_tls_get_addr_arg = 0;
8565
8566 /* Read the relocations. */
8567 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8568 info->keep_memory);
8569 if (relstart == NULL)
8570 {
8571 free (toc_ref);
8572 return FALSE;
8573 }
8574
8575 relend = relstart + sec->reloc_count;
8576 for (rel = relstart; rel < relend; rel++)
8577 {
8578 enum elf_ppc64_reloc_type r_type;
8579 unsigned long r_symndx;
8580 struct elf_link_hash_entry *h;
8581 Elf_Internal_Sym *sym;
8582 asection *sym_sec;
8583 unsigned char *tls_mask;
8584 unsigned char tls_set, tls_clear, tls_type = 0;
8585 bfd_vma value;
8586 bfd_boolean ok_tprel, is_local;
8587 long toc_ref_index = 0;
8588 int expecting_tls_get_addr = 0;
8589 bfd_boolean ret = FALSE;
8590
8591 r_symndx = ELF64_R_SYM (rel->r_info);
8592 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8593 r_symndx, ibfd))
8594 {
8595 err_free_rel:
8596 if (elf_section_data (sec)->relocs != relstart)
8597 free (relstart);
8598 if (toc_ref != NULL)
8599 free (toc_ref);
8600 if (locsyms != NULL
8601 && (elf_symtab_hdr (ibfd).contents
8602 != (unsigned char *) locsyms))
8603 free (locsyms);
8604 return ret;
8605 }
8606
8607 if (h != NULL)
8608 {
8609 if (h->root.type == bfd_link_hash_defined
8610 || h->root.type == bfd_link_hash_defweak)
8611 value = h->root.u.def.value;
8612 else if (h->root.type == bfd_link_hash_undefweak)
8613 value = 0;
8614 else
8615 {
8616 found_tls_get_addr_arg = 0;
8617 continue;
8618 }
8619 }
8620 else
8621 /* Symbols referenced by TLS relocs must be of type
8622 STT_TLS. So no need for .opd local sym adjust. */
8623 value = sym->st_value;
8624
8625 ok_tprel = FALSE;
8626 is_local = FALSE;
8627 if (h == NULL
8628 || !h->def_dynamic)
8629 {
8630 is_local = TRUE;
8631 if (h != NULL
8632 && h->root.type == bfd_link_hash_undefweak)
8633 ok_tprel = TRUE;
8634 else if (sym_sec != NULL
8635 && sym_sec->output_section != NULL)
8636 {
8637 value += sym_sec->output_offset;
8638 value += sym_sec->output_section->vma;
8639 value -= htab->elf.tls_sec->vma;
8640 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8641 < (bfd_vma) 1 << 32);
8642 }
8643 }
8644
8645 r_type = ELF64_R_TYPE (rel->r_info);
8646 /* If this section has old-style __tls_get_addr calls
8647 without marker relocs, then check that each
8648 __tls_get_addr call reloc is preceded by a reloc
8649 that conceivably belongs to the __tls_get_addr arg
8650 setup insn. If we don't find matching arg setup
8651 relocs, don't do any tls optimization. */
8652 if (pass == 0
8653 && sec->has_tls_get_addr_call
8654 && h != NULL
8655 && (h == &htab->tls_get_addr->elf
8656 || h == &htab->tls_get_addr_fd->elf)
8657 && !found_tls_get_addr_arg
8658 && is_branch_reloc (r_type))
8659 {
8660 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8661 "TLS optimization disabled\n"),
8662 ibfd, sec, rel->r_offset);
8663 ret = TRUE;
8664 goto err_free_rel;
8665 }
8666
8667 found_tls_get_addr_arg = 0;
8668 switch (r_type)
8669 {
8670 case R_PPC64_GOT_TLSLD16:
8671 case R_PPC64_GOT_TLSLD16_LO:
8672 expecting_tls_get_addr = 1;
8673 found_tls_get_addr_arg = 1;
8674 /* Fall through. */
8675
8676 case R_PPC64_GOT_TLSLD16_HI:
8677 case R_PPC64_GOT_TLSLD16_HA:
8678 /* These relocs should never be against a symbol
8679 defined in a shared lib. Leave them alone if
8680 that turns out to be the case. */
8681 if (!is_local)
8682 continue;
8683
8684 /* LD -> LE */
8685 tls_set = 0;
8686 tls_clear = TLS_LD;
8687 tls_type = TLS_TLS | TLS_LD;
8688 break;
8689
8690 case R_PPC64_GOT_TLSGD16:
8691 case R_PPC64_GOT_TLSGD16_LO:
8692 expecting_tls_get_addr = 1;
8693 found_tls_get_addr_arg = 1;
8694 /* Fall through. */
8695
8696 case R_PPC64_GOT_TLSGD16_HI:
8697 case R_PPC64_GOT_TLSGD16_HA:
8698 if (ok_tprel)
8699 /* GD -> LE */
8700 tls_set = 0;
8701 else
8702 /* GD -> IE */
8703 tls_set = TLS_TLS | TLS_TPRELGD;
8704 tls_clear = TLS_GD;
8705 tls_type = TLS_TLS | TLS_GD;
8706 break;
8707
8708 case R_PPC64_GOT_TPREL16_DS:
8709 case R_PPC64_GOT_TPREL16_LO_DS:
8710 case R_PPC64_GOT_TPREL16_HI:
8711 case R_PPC64_GOT_TPREL16_HA:
8712 if (ok_tprel)
8713 {
8714 /* IE -> LE */
8715 tls_set = 0;
8716 tls_clear = TLS_TPREL;
8717 tls_type = TLS_TLS | TLS_TPREL;
8718 break;
8719 }
8720 continue;
8721
8722 case R_PPC64_TLSGD:
8723 case R_PPC64_TLSLD:
8724 found_tls_get_addr_arg = 1;
8725 /* Fall through. */
8726
8727 case R_PPC64_TLS:
8728 case R_PPC64_TOC16:
8729 case R_PPC64_TOC16_LO:
8730 if (sym_sec == NULL || sym_sec != toc)
8731 continue;
8732
8733 /* Mark this toc entry as referenced by a TLS
8734 code sequence. We can do that now in the
8735 case of R_PPC64_TLS, and after checking for
8736 tls_get_addr for the TOC16 relocs. */
8737 if (toc_ref == NULL)
8738 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8739 if (toc_ref == NULL)
8740 goto err_free_rel;
8741
8742 if (h != NULL)
8743 value = h->root.u.def.value;
8744 else
8745 value = sym->st_value;
8746 value += rel->r_addend;
8747 if (value % 8 != 0)
8748 continue;
8749 BFD_ASSERT (value < toc->size
8750 && toc->output_offset % 8 == 0);
8751 toc_ref_index = (value + toc->output_offset) / 8;
8752 if (r_type == R_PPC64_TLS
8753 || r_type == R_PPC64_TLSGD
8754 || r_type == R_PPC64_TLSLD)
8755 {
8756 toc_ref[toc_ref_index] = 1;
8757 continue;
8758 }
8759
8760 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8761 continue;
8762
8763 tls_set = 0;
8764 tls_clear = 0;
8765 expecting_tls_get_addr = 2;
8766 break;
8767
8768 case R_PPC64_TPREL64:
8769 if (pass == 0
8770 || sec != toc
8771 || toc_ref == NULL
8772 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8773 continue;
8774 if (ok_tprel)
8775 {
8776 /* IE -> LE */
8777 tls_set = TLS_EXPLICIT;
8778 tls_clear = TLS_TPREL;
8779 break;
8780 }
8781 continue;
8782
8783 case R_PPC64_DTPMOD64:
8784 if (pass == 0
8785 || sec != toc
8786 || toc_ref == NULL
8787 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8788 continue;
8789 if (rel + 1 < relend
8790 && (rel[1].r_info
8791 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8792 && rel[1].r_offset == rel->r_offset + 8)
8793 {
8794 if (ok_tprel)
8795 /* GD -> LE */
8796 tls_set = TLS_EXPLICIT | TLS_GD;
8797 else
8798 /* GD -> IE */
8799 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8800 tls_clear = TLS_GD;
8801 }
8802 else
8803 {
8804 if (!is_local)
8805 continue;
8806
8807 /* LD -> LE */
8808 tls_set = TLS_EXPLICIT;
8809 tls_clear = TLS_LD;
8810 }
8811 break;
8812
8813 default:
8814 continue;
8815 }
8816
8817 if (pass == 0)
8818 {
8819 if (!expecting_tls_get_addr
8820 || !sec->has_tls_get_addr_call)
8821 continue;
8822
8823 if (rel + 1 < relend
8824 && branch_reloc_hash_match (ibfd, rel + 1,
8825 htab->tls_get_addr,
8826 htab->tls_get_addr_fd))
8827 {
8828 if (expecting_tls_get_addr == 2)
8829 {
8830 /* Check for toc tls entries. */
8831 unsigned char *toc_tls;
8832 int retval;
8833
8834 retval = get_tls_mask (&toc_tls, NULL, NULL,
8835 &locsyms,
8836 rel, ibfd);
8837 if (retval == 0)
8838 goto err_free_rel;
8839 if (toc_tls != NULL)
8840 {
8841 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8842 found_tls_get_addr_arg = 1;
8843 if (retval > 1)
8844 toc_ref[toc_ref_index] = 1;
8845 }
8846 }
8847 continue;
8848 }
8849
8850 if (expecting_tls_get_addr != 1)
8851 continue;
8852
8853 /* Uh oh, we didn't find the expected call. We
8854 could just mark this symbol to exclude it
8855 from tls optimization but it's safer to skip
8856 the entire optimization. */
8857 /* xgettext:c-format */
8858 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8859 "TLS optimization disabled\n"),
8860 ibfd, sec, rel->r_offset);
8861 ret = TRUE;
8862 goto err_free_rel;
8863 }
8864
8865 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8866 {
8867 struct plt_entry *ent;
8868 for (ent = htab->tls_get_addr->elf.plt.plist;
8869 ent != NULL;
8870 ent = ent->next)
8871 if (ent->addend == 0)
8872 {
8873 if (ent->plt.refcount > 0)
8874 {
8875 ent->plt.refcount -= 1;
8876 expecting_tls_get_addr = 0;
8877 }
8878 break;
8879 }
8880 }
8881
8882 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8883 {
8884 struct plt_entry *ent;
8885 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8886 ent != NULL;
8887 ent = ent->next)
8888 if (ent->addend == 0)
8889 {
8890 if (ent->plt.refcount > 0)
8891 ent->plt.refcount -= 1;
8892 break;
8893 }
8894 }
8895
8896 if (tls_clear == 0)
8897 continue;
8898
8899 if ((tls_set & TLS_EXPLICIT) == 0)
8900 {
8901 struct got_entry *ent;
8902
8903 /* Adjust got entry for this reloc. */
8904 if (h != NULL)
8905 ent = h->got.glist;
8906 else
8907 ent = elf_local_got_ents (ibfd)[r_symndx];
8908
8909 for (; ent != NULL; ent = ent->next)
8910 if (ent->addend == rel->r_addend
8911 && ent->owner == ibfd
8912 && ent->tls_type == tls_type)
8913 break;
8914 if (ent == NULL)
8915 abort ();
8916
8917 if (tls_set == 0)
8918 {
8919 /* We managed to get rid of a got entry. */
8920 if (ent->got.refcount > 0)
8921 ent->got.refcount -= 1;
8922 }
8923 }
8924 else
8925 {
8926 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8927 we'll lose one or two dyn relocs. */
8928 if (!dec_dynrel_count (rel->r_info, sec, info,
8929 NULL, h, sym))
8930 return FALSE;
8931
8932 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8933 {
8934 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8935 NULL, h, sym))
8936 return FALSE;
8937 }
8938 }
8939
8940 *tls_mask |= tls_set;
8941 *tls_mask &= ~tls_clear;
8942 }
8943
8944 if (elf_section_data (sec)->relocs != relstart)
8945 free (relstart);
8946 }
8947
8948 if (locsyms != NULL
8949 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8950 {
8951 if (!info->keep_memory)
8952 free (locsyms);
8953 else
8954 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8955 }
8956 }
8957
8958 if (toc_ref != NULL)
8959 free (toc_ref);
8960 htab->do_tls_opt = 1;
8961 return TRUE;
8962 }
8963
8964 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8965 the values of any global symbols in a toc section that has been
8966 edited. Globals in toc sections should be a rarity, so this function
8967 sets a flag if any are found in toc sections other than the one just
8968 edited, so that further hash table traversals can be avoided. */
8969
8970 struct adjust_toc_info
8971 {
8972 asection *toc;
8973 unsigned long *skip;
8974 bfd_boolean global_toc_syms;
8975 };
8976
8977 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8978
8979 static bfd_boolean
8980 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8981 {
8982 struct ppc_link_hash_entry *eh;
8983 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8984 unsigned long i;
8985
8986 if (h->root.type != bfd_link_hash_defined
8987 && h->root.type != bfd_link_hash_defweak)
8988 return TRUE;
8989
8990 eh = (struct ppc_link_hash_entry *) h;
8991 if (eh->adjust_done)
8992 return TRUE;
8993
8994 if (eh->elf.root.u.def.section == toc_inf->toc)
8995 {
8996 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8997 i = toc_inf->toc->rawsize >> 3;
8998 else
8999 i = eh->elf.root.u.def.value >> 3;
9000
9001 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
9002 {
9003 _bfd_error_handler
9004 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
9005 do
9006 ++i;
9007 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
9008 eh->elf.root.u.def.value = (bfd_vma) i << 3;
9009 }
9010
9011 eh->elf.root.u.def.value -= toc_inf->skip[i];
9012 eh->adjust_done = 1;
9013 }
9014 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
9015 toc_inf->global_toc_syms = TRUE;
9016
9017 return TRUE;
9018 }
9019
9020 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
9021 on a _LO variety toc/got reloc. */
9022
9023 static bfd_boolean
9024 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
9025 {
9026 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
9027 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
9028 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
9029 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
9030 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
9031 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
9032 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
9033 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
9034 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
9035 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
9036 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
9037 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
9038 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
9039 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
9040 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
9041 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
9042 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
9043 /* Exclude lfqu by testing reloc. If relocs are ever
9044 defined for the reduced D field in psq_lu then those
9045 will need testing too. */
9046 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9047 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
9048 && (insn & 1) == 0)
9049 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
9050 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
9051 /* Exclude stfqu. psq_stu as above for psq_lu. */
9052 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9053 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
9054 && (insn & 1) == 0));
9055 }
9056
9057 /* Examine all relocs referencing .toc sections in order to remove
9058 unused .toc entries. */
9059
9060 bfd_boolean
9061 ppc64_elf_edit_toc (struct bfd_link_info *info)
9062 {
9063 bfd *ibfd;
9064 struct adjust_toc_info toc_inf;
9065 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9066
9067 htab->do_toc_opt = 1;
9068 toc_inf.global_toc_syms = TRUE;
9069 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9070 {
9071 asection *toc, *sec;
9072 Elf_Internal_Shdr *symtab_hdr;
9073 Elf_Internal_Sym *local_syms;
9074 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9075 unsigned long *skip, *drop;
9076 unsigned char *used;
9077 unsigned char *keep, last, some_unused;
9078
9079 if (!is_ppc64_elf (ibfd))
9080 continue;
9081
9082 toc = bfd_get_section_by_name (ibfd, ".toc");
9083 if (toc == NULL
9084 || toc->size == 0
9085 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9086 || discarded_section (toc))
9087 continue;
9088
9089 toc_relocs = NULL;
9090 local_syms = NULL;
9091 symtab_hdr = &elf_symtab_hdr (ibfd);
9092
9093 /* Look at sections dropped from the final link. */
9094 skip = NULL;
9095 relstart = NULL;
9096 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9097 {
9098 if (sec->reloc_count == 0
9099 || !discarded_section (sec)
9100 || get_opd_info (sec)
9101 || (sec->flags & SEC_ALLOC) == 0
9102 || (sec->flags & SEC_DEBUGGING) != 0)
9103 continue;
9104
9105 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9106 if (relstart == NULL)
9107 goto error_ret;
9108
9109 /* Run through the relocs to see which toc entries might be
9110 unused. */
9111 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9112 {
9113 enum elf_ppc64_reloc_type r_type;
9114 unsigned long r_symndx;
9115 asection *sym_sec;
9116 struct elf_link_hash_entry *h;
9117 Elf_Internal_Sym *sym;
9118 bfd_vma val;
9119
9120 r_type = ELF64_R_TYPE (rel->r_info);
9121 switch (r_type)
9122 {
9123 default:
9124 continue;
9125
9126 case R_PPC64_TOC16:
9127 case R_PPC64_TOC16_LO:
9128 case R_PPC64_TOC16_HI:
9129 case R_PPC64_TOC16_HA:
9130 case R_PPC64_TOC16_DS:
9131 case R_PPC64_TOC16_LO_DS:
9132 break;
9133 }
9134
9135 r_symndx = ELF64_R_SYM (rel->r_info);
9136 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9137 r_symndx, ibfd))
9138 goto error_ret;
9139
9140 if (sym_sec != toc)
9141 continue;
9142
9143 if (h != NULL)
9144 val = h->root.u.def.value;
9145 else
9146 val = sym->st_value;
9147 val += rel->r_addend;
9148
9149 if (val >= toc->size)
9150 continue;
9151
9152 /* Anything in the toc ought to be aligned to 8 bytes.
9153 If not, don't mark as unused. */
9154 if (val & 7)
9155 continue;
9156
9157 if (skip == NULL)
9158 {
9159 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9160 if (skip == NULL)
9161 goto error_ret;
9162 }
9163
9164 skip[val >> 3] = ref_from_discarded;
9165 }
9166
9167 if (elf_section_data (sec)->relocs != relstart)
9168 free (relstart);
9169 }
9170
9171 /* For largetoc loads of address constants, we can convert
9172 . addis rx,2,addr@got@ha
9173 . ld ry,addr@got@l(rx)
9174 to
9175 . addis rx,2,addr@toc@ha
9176 . addi ry,rx,addr@toc@l
9177 when addr is within 2G of the toc pointer. This then means
9178 that the word storing "addr" in the toc is no longer needed. */
9179
9180 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9181 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9182 && toc->reloc_count != 0)
9183 {
9184 /* Read toc relocs. */
9185 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9186 info->keep_memory);
9187 if (toc_relocs == NULL)
9188 goto error_ret;
9189
9190 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9191 {
9192 enum elf_ppc64_reloc_type r_type;
9193 unsigned long r_symndx;
9194 asection *sym_sec;
9195 struct elf_link_hash_entry *h;
9196 Elf_Internal_Sym *sym;
9197 bfd_vma val, addr;
9198
9199 r_type = ELF64_R_TYPE (rel->r_info);
9200 if (r_type != R_PPC64_ADDR64)
9201 continue;
9202
9203 r_symndx = ELF64_R_SYM (rel->r_info);
9204 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9205 r_symndx, ibfd))
9206 goto error_ret;
9207
9208 if (sym_sec == NULL
9209 || sym_sec->output_section == NULL
9210 || discarded_section (sym_sec))
9211 continue;
9212
9213 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9214 continue;
9215
9216 if (h != NULL)
9217 {
9218 if (h->type == STT_GNU_IFUNC)
9219 continue;
9220 val = h->root.u.def.value;
9221 }
9222 else
9223 {
9224 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9225 continue;
9226 val = sym->st_value;
9227 }
9228 val += rel->r_addend;
9229 val += sym_sec->output_section->vma + sym_sec->output_offset;
9230
9231 /* We don't yet know the exact toc pointer value, but we
9232 know it will be somewhere in the toc section. Don't
9233 optimize if the difference from any possible toc
9234 pointer is outside [ff..f80008000, 7fff7fff]. */
9235 addr = toc->output_section->vma + TOC_BASE_OFF;
9236 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9237 continue;
9238
9239 addr = toc->output_section->vma + toc->output_section->rawsize;
9240 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9241 continue;
9242
9243 if (skip == NULL)
9244 {
9245 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9246 if (skip == NULL)
9247 goto error_ret;
9248 }
9249
9250 skip[rel->r_offset >> 3]
9251 |= can_optimize | ((rel - toc_relocs) << 2);
9252 }
9253 }
9254
9255 if (skip == NULL)
9256 continue;
9257
9258 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9259 if (used == NULL)
9260 {
9261 error_ret:
9262 if (local_syms != NULL
9263 && symtab_hdr->contents != (unsigned char *) local_syms)
9264 free (local_syms);
9265 if (sec != NULL
9266 && relstart != NULL
9267 && elf_section_data (sec)->relocs != relstart)
9268 free (relstart);
9269 if (toc_relocs != NULL
9270 && elf_section_data (toc)->relocs != toc_relocs)
9271 free (toc_relocs);
9272 if (skip != NULL)
9273 free (skip);
9274 return FALSE;
9275 }
9276
9277 /* Now check all kept sections that might reference the toc.
9278 Check the toc itself last. */
9279 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9280 : ibfd->sections);
9281 sec != NULL;
9282 sec = (sec == toc ? NULL
9283 : sec->next == NULL ? toc
9284 : sec->next == toc && toc->next ? toc->next
9285 : sec->next))
9286 {
9287 int repeat;
9288
9289 if (sec->reloc_count == 0
9290 || discarded_section (sec)
9291 || get_opd_info (sec)
9292 || (sec->flags & SEC_ALLOC) == 0
9293 || (sec->flags & SEC_DEBUGGING) != 0)
9294 continue;
9295
9296 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9297 info->keep_memory);
9298 if (relstart == NULL)
9299 {
9300 free (used);
9301 goto error_ret;
9302 }
9303
9304 /* Mark toc entries referenced as used. */
9305 do
9306 {
9307 repeat = 0;
9308 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9309 {
9310 enum elf_ppc64_reloc_type r_type;
9311 unsigned long r_symndx;
9312 asection *sym_sec;
9313 struct elf_link_hash_entry *h;
9314 Elf_Internal_Sym *sym;
9315 bfd_vma val;
9316 enum {no_check, check_lo, check_ha} insn_check;
9317
9318 r_type = ELF64_R_TYPE (rel->r_info);
9319 switch (r_type)
9320 {
9321 default:
9322 insn_check = no_check;
9323 break;
9324
9325 case R_PPC64_GOT_TLSLD16_HA:
9326 case R_PPC64_GOT_TLSGD16_HA:
9327 case R_PPC64_GOT_TPREL16_HA:
9328 case R_PPC64_GOT_DTPREL16_HA:
9329 case R_PPC64_GOT16_HA:
9330 case R_PPC64_TOC16_HA:
9331 insn_check = check_ha;
9332 break;
9333
9334 case R_PPC64_GOT_TLSLD16_LO:
9335 case R_PPC64_GOT_TLSGD16_LO:
9336 case R_PPC64_GOT_TPREL16_LO_DS:
9337 case R_PPC64_GOT_DTPREL16_LO_DS:
9338 case R_PPC64_GOT16_LO:
9339 case R_PPC64_GOT16_LO_DS:
9340 case R_PPC64_TOC16_LO:
9341 case R_PPC64_TOC16_LO_DS:
9342 insn_check = check_lo;
9343 break;
9344 }
9345
9346 if (insn_check != no_check)
9347 {
9348 bfd_vma off = rel->r_offset & ~3;
9349 unsigned char buf[4];
9350 unsigned int insn;
9351
9352 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9353 {
9354 free (used);
9355 goto error_ret;
9356 }
9357 insn = bfd_get_32 (ibfd, buf);
9358 if (insn_check == check_lo
9359 ? !ok_lo_toc_insn (insn, r_type)
9360 : ((insn & ((0x3f << 26) | 0x1f << 16))
9361 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9362 {
9363 char str[12];
9364
9365 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9366 sprintf (str, "%#08x", insn);
9367 info->callbacks->einfo
9368 /* xgettext:c-format */
9369 (_("%H: toc optimization is not supported for"
9370 " %s instruction.\n"),
9371 ibfd, sec, rel->r_offset & ~3, str);
9372 }
9373 }
9374
9375 switch (r_type)
9376 {
9377 case R_PPC64_TOC16:
9378 case R_PPC64_TOC16_LO:
9379 case R_PPC64_TOC16_HI:
9380 case R_PPC64_TOC16_HA:
9381 case R_PPC64_TOC16_DS:
9382 case R_PPC64_TOC16_LO_DS:
9383 /* In case we're taking addresses of toc entries. */
9384 case R_PPC64_ADDR64:
9385 break;
9386
9387 default:
9388 continue;
9389 }
9390
9391 r_symndx = ELF64_R_SYM (rel->r_info);
9392 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9393 r_symndx, ibfd))
9394 {
9395 free (used);
9396 goto error_ret;
9397 }
9398
9399 if (sym_sec != toc)
9400 continue;
9401
9402 if (h != NULL)
9403 val = h->root.u.def.value;
9404 else
9405 val = sym->st_value;
9406 val += rel->r_addend;
9407
9408 if (val >= toc->size)
9409 continue;
9410
9411 if ((skip[val >> 3] & can_optimize) != 0)
9412 {
9413 bfd_vma off;
9414 unsigned char opc;
9415
9416 switch (r_type)
9417 {
9418 case R_PPC64_TOC16_HA:
9419 break;
9420
9421 case R_PPC64_TOC16_LO_DS:
9422 off = rel->r_offset;
9423 off += (bfd_big_endian (ibfd) ? -2 : 3);
9424 if (!bfd_get_section_contents (ibfd, sec, &opc,
9425 off, 1))
9426 {
9427 free (used);
9428 goto error_ret;
9429 }
9430 if ((opc & (0x3f << 2)) == (58u << 2))
9431 break;
9432 /* Fall through. */
9433
9434 default:
9435 /* Wrong sort of reloc, or not a ld. We may
9436 as well clear ref_from_discarded too. */
9437 skip[val >> 3] = 0;
9438 }
9439 }
9440
9441 if (sec != toc)
9442 used[val >> 3] = 1;
9443 /* For the toc section, we only mark as used if this
9444 entry itself isn't unused. */
9445 else if ((used[rel->r_offset >> 3]
9446 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9447 && !used[val >> 3])
9448 {
9449 /* Do all the relocs again, to catch reference
9450 chains. */
9451 repeat = 1;
9452 used[val >> 3] = 1;
9453 }
9454 }
9455 }
9456 while (repeat);
9457
9458 if (elf_section_data (sec)->relocs != relstart)
9459 free (relstart);
9460 }
9461
9462 /* Merge the used and skip arrays. Assume that TOC
9463 doublewords not appearing as either used or unused belong
9464 to an entry more than one doubleword in size. */
9465 for (drop = skip, keep = used, last = 0, some_unused = 0;
9466 drop < skip + (toc->size + 7) / 8;
9467 ++drop, ++keep)
9468 {
9469 if (*keep)
9470 {
9471 *drop &= ~ref_from_discarded;
9472 if ((*drop & can_optimize) != 0)
9473 some_unused = 1;
9474 last = 0;
9475 }
9476 else if ((*drop & ref_from_discarded) != 0)
9477 {
9478 some_unused = 1;
9479 last = ref_from_discarded;
9480 }
9481 else
9482 *drop = last;
9483 }
9484
9485 free (used);
9486
9487 if (some_unused)
9488 {
9489 bfd_byte *contents, *src;
9490 unsigned long off;
9491 Elf_Internal_Sym *sym;
9492 bfd_boolean local_toc_syms = FALSE;
9493
9494 /* Shuffle the toc contents, and at the same time convert the
9495 skip array from booleans into offsets. */
9496 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9497 goto error_ret;
9498
9499 elf_section_data (toc)->this_hdr.contents = contents;
9500
9501 for (src = contents, off = 0, drop = skip;
9502 src < contents + toc->size;
9503 src += 8, ++drop)
9504 {
9505 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9506 off += 8;
9507 else if (off != 0)
9508 {
9509 *drop = off;
9510 memcpy (src - off, src, 8);
9511 }
9512 }
9513 *drop = off;
9514 toc->rawsize = toc->size;
9515 toc->size = src - contents - off;
9516
9517 /* Adjust addends for relocs against the toc section sym,
9518 and optimize any accesses we can. */
9519 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9520 {
9521 if (sec->reloc_count == 0
9522 || discarded_section (sec))
9523 continue;
9524
9525 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9526 info->keep_memory);
9527 if (relstart == NULL)
9528 goto error_ret;
9529
9530 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9531 {
9532 enum elf_ppc64_reloc_type r_type;
9533 unsigned long r_symndx;
9534 asection *sym_sec;
9535 struct elf_link_hash_entry *h;
9536 bfd_vma val;
9537
9538 r_type = ELF64_R_TYPE (rel->r_info);
9539 switch (r_type)
9540 {
9541 default:
9542 continue;
9543
9544 case R_PPC64_TOC16:
9545 case R_PPC64_TOC16_LO:
9546 case R_PPC64_TOC16_HI:
9547 case R_PPC64_TOC16_HA:
9548 case R_PPC64_TOC16_DS:
9549 case R_PPC64_TOC16_LO_DS:
9550 case R_PPC64_ADDR64:
9551 break;
9552 }
9553
9554 r_symndx = ELF64_R_SYM (rel->r_info);
9555 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9556 r_symndx, ibfd))
9557 goto error_ret;
9558
9559 if (sym_sec != toc)
9560 continue;
9561
9562 if (h != NULL)
9563 val = h->root.u.def.value;
9564 else
9565 {
9566 val = sym->st_value;
9567 if (val != 0)
9568 local_toc_syms = TRUE;
9569 }
9570
9571 val += rel->r_addend;
9572
9573 if (val > toc->rawsize)
9574 val = toc->rawsize;
9575 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9576 continue;
9577 else if ((skip[val >> 3] & can_optimize) != 0)
9578 {
9579 Elf_Internal_Rela *tocrel
9580 = toc_relocs + (skip[val >> 3] >> 2);
9581 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9582
9583 switch (r_type)
9584 {
9585 case R_PPC64_TOC16_HA:
9586 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9587 break;
9588
9589 case R_PPC64_TOC16_LO_DS:
9590 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9591 break;
9592
9593 default:
9594 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9595 ppc_howto_init ();
9596 info->callbacks->einfo
9597 /* xgettext:c-format */
9598 (_("%H: %s references "
9599 "optimized away TOC entry\n"),
9600 ibfd, sec, rel->r_offset,
9601 ppc64_elf_howto_table[r_type]->name);
9602 bfd_set_error (bfd_error_bad_value);
9603 goto error_ret;
9604 }
9605 rel->r_addend = tocrel->r_addend;
9606 elf_section_data (sec)->relocs = relstart;
9607 continue;
9608 }
9609
9610 if (h != NULL || sym->st_value != 0)
9611 continue;
9612
9613 rel->r_addend -= skip[val >> 3];
9614 elf_section_data (sec)->relocs = relstart;
9615 }
9616
9617 if (elf_section_data (sec)->relocs != relstart)
9618 free (relstart);
9619 }
9620
9621 /* We shouldn't have local or global symbols defined in the TOC,
9622 but handle them anyway. */
9623 if (local_syms != NULL)
9624 for (sym = local_syms;
9625 sym < local_syms + symtab_hdr->sh_info;
9626 ++sym)
9627 if (sym->st_value != 0
9628 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9629 {
9630 unsigned long i;
9631
9632 if (sym->st_value > toc->rawsize)
9633 i = toc->rawsize >> 3;
9634 else
9635 i = sym->st_value >> 3;
9636
9637 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9638 {
9639 if (local_toc_syms)
9640 _bfd_error_handler
9641 (_("%s defined on removed toc entry"),
9642 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9643 do
9644 ++i;
9645 while ((skip[i] & (ref_from_discarded | can_optimize)));
9646 sym->st_value = (bfd_vma) i << 3;
9647 }
9648
9649 sym->st_value -= skip[i];
9650 symtab_hdr->contents = (unsigned char *) local_syms;
9651 }
9652
9653 /* Adjust any global syms defined in this toc input section. */
9654 if (toc_inf.global_toc_syms)
9655 {
9656 toc_inf.toc = toc;
9657 toc_inf.skip = skip;
9658 toc_inf.global_toc_syms = FALSE;
9659 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9660 &toc_inf);
9661 }
9662
9663 if (toc->reloc_count != 0)
9664 {
9665 Elf_Internal_Shdr *rel_hdr;
9666 Elf_Internal_Rela *wrel;
9667 bfd_size_type sz;
9668
9669 /* Remove unused toc relocs, and adjust those we keep. */
9670 if (toc_relocs == NULL)
9671 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9672 info->keep_memory);
9673 if (toc_relocs == NULL)
9674 goto error_ret;
9675
9676 wrel = toc_relocs;
9677 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9678 if ((skip[rel->r_offset >> 3]
9679 & (ref_from_discarded | can_optimize)) == 0)
9680 {
9681 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9682 wrel->r_info = rel->r_info;
9683 wrel->r_addend = rel->r_addend;
9684 ++wrel;
9685 }
9686 else if (!dec_dynrel_count (rel->r_info, toc, info,
9687 &local_syms, NULL, NULL))
9688 goto error_ret;
9689
9690 elf_section_data (toc)->relocs = toc_relocs;
9691 toc->reloc_count = wrel - toc_relocs;
9692 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9693 sz = rel_hdr->sh_entsize;
9694 rel_hdr->sh_size = toc->reloc_count * sz;
9695 }
9696 }
9697 else if (toc_relocs != NULL
9698 && elf_section_data (toc)->relocs != toc_relocs)
9699 free (toc_relocs);
9700
9701 if (local_syms != NULL
9702 && symtab_hdr->contents != (unsigned char *) local_syms)
9703 {
9704 if (!info->keep_memory)
9705 free (local_syms);
9706 else
9707 symtab_hdr->contents = (unsigned char *) local_syms;
9708 }
9709 free (skip);
9710 }
9711
9712 return TRUE;
9713 }
9714
9715 /* Return true iff input section I references the TOC using
9716 instructions limited to +/-32k offsets. */
9717
9718 bfd_boolean
9719 ppc64_elf_has_small_toc_reloc (asection *i)
9720 {
9721 return (is_ppc64_elf (i->owner)
9722 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9723 }
9724
9725 /* Allocate space for one GOT entry. */
9726
9727 static void
9728 allocate_got (struct elf_link_hash_entry *h,
9729 struct bfd_link_info *info,
9730 struct got_entry *gent)
9731 {
9732 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9733 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9734 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9735 ? 16 : 8);
9736 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9737 ? 2 : 1) * sizeof (Elf64_External_Rela);
9738 asection *got = ppc64_elf_tdata (gent->owner)->got;
9739
9740 gent->got.offset = got->size;
9741 got->size += entsize;
9742
9743 if (h->type == STT_GNU_IFUNC)
9744 {
9745 htab->elf.irelplt->size += rentsize;
9746 htab->got_reli_size += rentsize;
9747 }
9748 else if ((bfd_link_pic (info)
9749 || (htab->elf.dynamic_sections_created
9750 && h->dynindx != -1
9751 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9752 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9753 {
9754 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9755 relgot->size += rentsize;
9756 }
9757 }
9758
9759 /* This function merges got entries in the same toc group. */
9760
9761 static void
9762 merge_got_entries (struct got_entry **pent)
9763 {
9764 struct got_entry *ent, *ent2;
9765
9766 for (ent = *pent; ent != NULL; ent = ent->next)
9767 if (!ent->is_indirect)
9768 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9769 if (!ent2->is_indirect
9770 && ent2->addend == ent->addend
9771 && ent2->tls_type == ent->tls_type
9772 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9773 {
9774 ent2->is_indirect = TRUE;
9775 ent2->got.ent = ent;
9776 }
9777 }
9778
9779 /* If H is undefined, make it dynamic if that makes sense. */
9780
9781 static bfd_boolean
9782 ensure_undef_dynamic (struct bfd_link_info *info,
9783 struct elf_link_hash_entry *h)
9784 {
9785 struct elf_link_hash_table *htab = elf_hash_table (info);
9786
9787 if (htab->dynamic_sections_created
9788 && ((info->dynamic_undefined_weak != 0
9789 && h->root.type == bfd_link_hash_undefweak)
9790 || h->root.type == bfd_link_hash_undefined)
9791 && h->dynindx == -1
9792 && !h->forced_local
9793 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9794 return bfd_elf_link_record_dynamic_symbol (info, h);
9795 return TRUE;
9796 }
9797
9798 /* Allocate space in .plt, .got and associated reloc sections for
9799 dynamic relocs. */
9800
9801 static bfd_boolean
9802 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9803 {
9804 struct bfd_link_info *info;
9805 struct ppc_link_hash_table *htab;
9806 asection *s;
9807 struct ppc_link_hash_entry *eh;
9808 struct got_entry **pgent, *gent;
9809
9810 if (h->root.type == bfd_link_hash_indirect)
9811 return TRUE;
9812
9813 info = (struct bfd_link_info *) inf;
9814 htab = ppc_hash_table (info);
9815 if (htab == NULL)
9816 return FALSE;
9817
9818 eh = (struct ppc_link_hash_entry *) h;
9819 /* Run through the TLS GD got entries first if we're changing them
9820 to TPREL. */
9821 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9822 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9823 if (gent->got.refcount > 0
9824 && (gent->tls_type & TLS_GD) != 0)
9825 {
9826 /* This was a GD entry that has been converted to TPREL. If
9827 there happens to be a TPREL entry we can use that one. */
9828 struct got_entry *ent;
9829 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9830 if (ent->got.refcount > 0
9831 && (ent->tls_type & TLS_TPREL) != 0
9832 && ent->addend == gent->addend
9833 && ent->owner == gent->owner)
9834 {
9835 gent->got.refcount = 0;
9836 break;
9837 }
9838
9839 /* If not, then we'll be using our own TPREL entry. */
9840 if (gent->got.refcount != 0)
9841 gent->tls_type = TLS_TLS | TLS_TPREL;
9842 }
9843
9844 /* Remove any list entry that won't generate a word in the GOT before
9845 we call merge_got_entries. Otherwise we risk merging to empty
9846 entries. */
9847 pgent = &h->got.glist;
9848 while ((gent = *pgent) != NULL)
9849 if (gent->got.refcount > 0)
9850 {
9851 if ((gent->tls_type & TLS_LD) != 0
9852 && !h->def_dynamic)
9853 {
9854 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9855 *pgent = gent->next;
9856 }
9857 else
9858 pgent = &gent->next;
9859 }
9860 else
9861 *pgent = gent->next;
9862
9863 if (!htab->do_multi_toc)
9864 merge_got_entries (&h->got.glist);
9865
9866 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9867 if (!gent->is_indirect)
9868 {
9869 /* Make sure this symbol is output as a dynamic symbol. */
9870 if (!ensure_undef_dynamic (info, h))
9871 return FALSE;
9872
9873 if (!is_ppc64_elf (gent->owner))
9874 abort ();
9875
9876 allocate_got (h, info, gent);
9877 }
9878
9879 /* If no dynamic sections we can't have dynamic relocs, except for
9880 IFUNCs which are handled even in static executables. */
9881 if (!htab->elf.dynamic_sections_created
9882 && h->type != STT_GNU_IFUNC)
9883 eh->dyn_relocs = NULL;
9884
9885 /* Also discard relocs on undefined weak syms with non-default
9886 visibility, or when dynamic_undefined_weak says so. */
9887 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9888 eh->dyn_relocs = NULL;
9889
9890 if (eh->dyn_relocs != NULL)
9891 {
9892 struct elf_dyn_relocs *p, **pp;
9893
9894 /* In the shared -Bsymbolic case, discard space allocated for
9895 dynamic pc-relative relocs against symbols which turn out to
9896 be defined in regular objects. For the normal shared case,
9897 discard space for relocs that have become local due to symbol
9898 visibility changes. */
9899
9900 if (bfd_link_pic (info))
9901 {
9902 /* Relocs that use pc_count are those that appear on a call
9903 insn, or certain REL relocs (see must_be_dyn_reloc) that
9904 can be generated via assembly. We want calls to
9905 protected symbols to resolve directly to the function
9906 rather than going via the plt. If people want function
9907 pointer comparisons to work as expected then they should
9908 avoid writing weird assembly. */
9909 if (SYMBOL_CALLS_LOCAL (info, h))
9910 {
9911 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9912 {
9913 p->count -= p->pc_count;
9914 p->pc_count = 0;
9915 if (p->count == 0)
9916 *pp = p->next;
9917 else
9918 pp = &p->next;
9919 }
9920 }
9921
9922 if (eh->dyn_relocs != NULL)
9923 {
9924 /* Make sure this symbol is output as a dynamic symbol. */
9925 if (!ensure_undef_dynamic (info, h))
9926 return FALSE;
9927 }
9928 }
9929 else if (h->type == STT_GNU_IFUNC)
9930 {
9931 /* A plt entry is always created when making direct calls to
9932 an ifunc, even when building a static executable, but
9933 that doesn't cover all cases. We may have only an ifunc
9934 initialised function pointer for a given ifunc symbol.
9935
9936 For ELFv2, dynamic relocations are not required when
9937 generating a global entry PLT stub. */
9938 if (abiversion (info->output_bfd) >= 2)
9939 {
9940 if (global_entry_stub (h))
9941 eh->dyn_relocs = NULL;
9942 }
9943
9944 /* For ELFv1 we have function descriptors. Descriptors need
9945 to be treated like PLT entries and thus have dynamic
9946 relocations. One exception is when the function
9947 descriptor is copied into .dynbss (which should only
9948 happen with ancient versions of gcc). */
9949 else if (h->needs_copy)
9950 eh->dyn_relocs = NULL;
9951 }
9952 else if (ELIMINATE_COPY_RELOCS)
9953 {
9954 /* For the non-pic case, discard space for relocs against
9955 symbols which turn out to need copy relocs or are not
9956 dynamic. */
9957 if (!h->non_got_ref
9958 && !h->def_regular)
9959 {
9960 /* Make sure this symbol is output as a dynamic symbol. */
9961 if (!ensure_undef_dynamic (info, h))
9962 return FALSE;
9963
9964 if (h->dynindx == -1)
9965 eh->dyn_relocs = NULL;
9966 }
9967 else
9968 eh->dyn_relocs = NULL;
9969 }
9970
9971 /* Finally, allocate space. */
9972 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9973 {
9974 asection *sreloc = elf_section_data (p->sec)->sreloc;
9975 if (eh->elf.type == STT_GNU_IFUNC)
9976 sreloc = htab->elf.irelplt;
9977 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9978 }
9979 }
9980
9981 if ((htab->elf.dynamic_sections_created
9982 && h->dynindx != -1)
9983 || h->type == STT_GNU_IFUNC)
9984 {
9985 struct plt_entry *pent;
9986 bfd_boolean doneone = FALSE;
9987 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9988 if (pent->plt.refcount > 0)
9989 {
9990 if (!htab->elf.dynamic_sections_created
9991 || h->dynindx == -1)
9992 {
9993 s = htab->elf.iplt;
9994 pent->plt.offset = s->size;
9995 s->size += PLT_ENTRY_SIZE (htab);
9996 s = htab->elf.irelplt;
9997 }
9998 else
9999 {
10000 /* If this is the first .plt entry, make room for the special
10001 first entry. */
10002 s = htab->elf.splt;
10003 if (s->size == 0)
10004 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
10005
10006 pent->plt.offset = s->size;
10007
10008 /* Make room for this entry. */
10009 s->size += PLT_ENTRY_SIZE (htab);
10010
10011 /* Make room for the .glink code. */
10012 s = htab->glink;
10013 if (s->size == 0)
10014 s->size += GLINK_CALL_STUB_SIZE;
10015 if (htab->opd_abi)
10016 {
10017 /* We need bigger stubs past index 32767. */
10018 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
10019 s->size += 4;
10020 s->size += 2*4;
10021 }
10022 else
10023 s->size += 4;
10024
10025 /* We also need to make an entry in the .rela.plt section. */
10026 s = htab->elf.srelplt;
10027 }
10028 s->size += sizeof (Elf64_External_Rela);
10029 doneone = TRUE;
10030 }
10031 else
10032 pent->plt.offset = (bfd_vma) -1;
10033 if (!doneone)
10034 {
10035 h->plt.plist = NULL;
10036 h->needs_plt = 0;
10037 }
10038 }
10039 else
10040 {
10041 h->plt.plist = NULL;
10042 h->needs_plt = 0;
10043 }
10044
10045 return TRUE;
10046 }
10047
10048 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
10049 to set up space for global entry stubs. These are put in glink,
10050 after the branch table. */
10051
10052 static bfd_boolean
10053 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
10054 {
10055 struct bfd_link_info *info;
10056 struct ppc_link_hash_table *htab;
10057 struct plt_entry *pent;
10058 asection *s;
10059
10060 if (h->root.type == bfd_link_hash_indirect)
10061 return TRUE;
10062
10063 if (!h->pointer_equality_needed)
10064 return TRUE;
10065
10066 if (h->def_regular)
10067 return TRUE;
10068
10069 info = inf;
10070 htab = ppc_hash_table (info);
10071 if (htab == NULL)
10072 return FALSE;
10073
10074 s = htab->glink;
10075 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10076 if (pent->plt.offset != (bfd_vma) -1
10077 && pent->addend == 0)
10078 {
10079 /* For ELFv2, if this symbol is not defined in a regular file
10080 and we are not generating a shared library or pie, then we
10081 need to define the symbol in the executable on a call stub.
10082 This is to avoid text relocations. */
10083 s->size = (s->size + 15) & -16;
10084 h->root.type = bfd_link_hash_defined;
10085 h->root.u.def.section = s;
10086 h->root.u.def.value = s->size;
10087 s->size += 16;
10088 break;
10089 }
10090 return TRUE;
10091 }
10092
10093 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10094 read-only sections. */
10095
10096 static bfd_boolean
10097 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10098 {
10099 if (h->root.type == bfd_link_hash_indirect)
10100 return TRUE;
10101
10102 if (readonly_dynrelocs (h))
10103 {
10104 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10105
10106 /* Not an error, just cut short the traversal. */
10107 return FALSE;
10108 }
10109 return TRUE;
10110 }
10111
10112 /* Set the sizes of the dynamic sections. */
10113
10114 static bfd_boolean
10115 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10116 struct bfd_link_info *info)
10117 {
10118 struct ppc_link_hash_table *htab;
10119 bfd *dynobj;
10120 asection *s;
10121 bfd_boolean relocs;
10122 bfd *ibfd;
10123 struct got_entry *first_tlsld;
10124
10125 htab = ppc_hash_table (info);
10126 if (htab == NULL)
10127 return FALSE;
10128
10129 dynobj = htab->elf.dynobj;
10130 if (dynobj == NULL)
10131 abort ();
10132
10133 if (htab->elf.dynamic_sections_created)
10134 {
10135 /* Set the contents of the .interp section to the interpreter. */
10136 if (bfd_link_executable (info) && !info->nointerp)
10137 {
10138 s = bfd_get_linker_section (dynobj, ".interp");
10139 if (s == NULL)
10140 abort ();
10141 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10142 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10143 }
10144 }
10145
10146 /* Set up .got offsets for local syms, and space for local dynamic
10147 relocs. */
10148 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10149 {
10150 struct got_entry **lgot_ents;
10151 struct got_entry **end_lgot_ents;
10152 struct plt_entry **local_plt;
10153 struct plt_entry **end_local_plt;
10154 unsigned char *lgot_masks;
10155 bfd_size_type locsymcount;
10156 Elf_Internal_Shdr *symtab_hdr;
10157
10158 if (!is_ppc64_elf (ibfd))
10159 continue;
10160
10161 for (s = ibfd->sections; s != NULL; s = s->next)
10162 {
10163 struct ppc_dyn_relocs *p;
10164
10165 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10166 {
10167 if (!bfd_is_abs_section (p->sec)
10168 && bfd_is_abs_section (p->sec->output_section))
10169 {
10170 /* Input section has been discarded, either because
10171 it is a copy of a linkonce section or due to
10172 linker script /DISCARD/, so we'll be discarding
10173 the relocs too. */
10174 }
10175 else if (p->count != 0)
10176 {
10177 asection *srel = elf_section_data (p->sec)->sreloc;
10178 if (p->ifunc)
10179 srel = htab->elf.irelplt;
10180 srel->size += p->count * sizeof (Elf64_External_Rela);
10181 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10182 info->flags |= DF_TEXTREL;
10183 }
10184 }
10185 }
10186
10187 lgot_ents = elf_local_got_ents (ibfd);
10188 if (!lgot_ents)
10189 continue;
10190
10191 symtab_hdr = &elf_symtab_hdr (ibfd);
10192 locsymcount = symtab_hdr->sh_info;
10193 end_lgot_ents = lgot_ents + locsymcount;
10194 local_plt = (struct plt_entry **) end_lgot_ents;
10195 end_local_plt = local_plt + locsymcount;
10196 lgot_masks = (unsigned char *) end_local_plt;
10197 s = ppc64_elf_tdata (ibfd)->got;
10198 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10199 {
10200 struct got_entry **pent, *ent;
10201
10202 pent = lgot_ents;
10203 while ((ent = *pent) != NULL)
10204 if (ent->got.refcount > 0)
10205 {
10206 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10207 {
10208 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10209 *pent = ent->next;
10210 }
10211 else
10212 {
10213 unsigned int ent_size = 8;
10214 unsigned int rel_size = sizeof (Elf64_External_Rela);
10215
10216 ent->got.offset = s->size;
10217 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10218 {
10219 ent_size *= 2;
10220 rel_size *= 2;
10221 }
10222 s->size += ent_size;
10223 if ((*lgot_masks & PLT_IFUNC) != 0)
10224 {
10225 htab->elf.irelplt->size += rel_size;
10226 htab->got_reli_size += rel_size;
10227 }
10228 else if (bfd_link_pic (info))
10229 {
10230 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10231 srel->size += rel_size;
10232 }
10233 pent = &ent->next;
10234 }
10235 }
10236 else
10237 *pent = ent->next;
10238 }
10239
10240 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10241 for (; local_plt < end_local_plt; ++local_plt)
10242 {
10243 struct plt_entry *ent;
10244
10245 for (ent = *local_plt; ent != NULL; ent = ent->next)
10246 if (ent->plt.refcount > 0)
10247 {
10248 s = htab->elf.iplt;
10249 ent->plt.offset = s->size;
10250 s->size += PLT_ENTRY_SIZE (htab);
10251
10252 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10253 }
10254 else
10255 ent->plt.offset = (bfd_vma) -1;
10256 }
10257 }
10258
10259 /* Allocate global sym .plt and .got entries, and space for global
10260 sym dynamic relocs. */
10261 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10262 /* Stash the end of glink branch table. */
10263 if (htab->glink != NULL)
10264 htab->glink->rawsize = htab->glink->size;
10265
10266 if (!htab->opd_abi && !bfd_link_pic (info))
10267 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10268
10269 first_tlsld = NULL;
10270 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10271 {
10272 struct got_entry *ent;
10273
10274 if (!is_ppc64_elf (ibfd))
10275 continue;
10276
10277 ent = ppc64_tlsld_got (ibfd);
10278 if (ent->got.refcount > 0)
10279 {
10280 if (!htab->do_multi_toc && first_tlsld != NULL)
10281 {
10282 ent->is_indirect = TRUE;
10283 ent->got.ent = first_tlsld;
10284 }
10285 else
10286 {
10287 if (first_tlsld == NULL)
10288 first_tlsld = ent;
10289 s = ppc64_elf_tdata (ibfd)->got;
10290 ent->got.offset = s->size;
10291 ent->owner = ibfd;
10292 s->size += 16;
10293 if (bfd_link_pic (info))
10294 {
10295 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10296 srel->size += sizeof (Elf64_External_Rela);
10297 }
10298 }
10299 }
10300 else
10301 ent->got.offset = (bfd_vma) -1;
10302 }
10303
10304 /* We now have determined the sizes of the various dynamic sections.
10305 Allocate memory for them. */
10306 relocs = FALSE;
10307 for (s = dynobj->sections; s != NULL; s = s->next)
10308 {
10309 if ((s->flags & SEC_LINKER_CREATED) == 0)
10310 continue;
10311
10312 if (s == htab->brlt || s == htab->relbrlt)
10313 /* These haven't been allocated yet; don't strip. */
10314 continue;
10315 else if (s == htab->elf.sgot
10316 || s == htab->elf.splt
10317 || s == htab->elf.iplt
10318 || s == htab->glink
10319 || s == htab->elf.sdynbss
10320 || s == htab->elf.sdynrelro)
10321 {
10322 /* Strip this section if we don't need it; see the
10323 comment below. */
10324 }
10325 else if (s == htab->glink_eh_frame)
10326 {
10327 if (!bfd_is_abs_section (s->output_section))
10328 /* Not sized yet. */
10329 continue;
10330 }
10331 else if (CONST_STRNEQ (s->name, ".rela"))
10332 {
10333 if (s->size != 0)
10334 {
10335 if (s != htab->elf.srelplt)
10336 relocs = TRUE;
10337
10338 /* We use the reloc_count field as a counter if we need
10339 to copy relocs into the output file. */
10340 s->reloc_count = 0;
10341 }
10342 }
10343 else
10344 {
10345 /* It's not one of our sections, so don't allocate space. */
10346 continue;
10347 }
10348
10349 if (s->size == 0)
10350 {
10351 /* If we don't need this section, strip it from the
10352 output file. This is mostly to handle .rela.bss and
10353 .rela.plt. We must create both sections in
10354 create_dynamic_sections, because they must be created
10355 before the linker maps input sections to output
10356 sections. The linker does that before
10357 adjust_dynamic_symbol is called, and it is that
10358 function which decides whether anything needs to go
10359 into these sections. */
10360 s->flags |= SEC_EXCLUDE;
10361 continue;
10362 }
10363
10364 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10365 continue;
10366
10367 /* Allocate memory for the section contents. We use bfd_zalloc
10368 here in case unused entries are not reclaimed before the
10369 section's contents are written out. This should not happen,
10370 but this way if it does we get a R_PPC64_NONE reloc in .rela
10371 sections instead of garbage.
10372 We also rely on the section contents being zero when writing
10373 the GOT and .dynrelro. */
10374 s->contents = bfd_zalloc (dynobj, s->size);
10375 if (s->contents == NULL)
10376 return FALSE;
10377 }
10378
10379 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10380 {
10381 if (!is_ppc64_elf (ibfd))
10382 continue;
10383
10384 s = ppc64_elf_tdata (ibfd)->got;
10385 if (s != NULL && s != htab->elf.sgot)
10386 {
10387 if (s->size == 0)
10388 s->flags |= SEC_EXCLUDE;
10389 else
10390 {
10391 s->contents = bfd_zalloc (ibfd, s->size);
10392 if (s->contents == NULL)
10393 return FALSE;
10394 }
10395 }
10396 s = ppc64_elf_tdata (ibfd)->relgot;
10397 if (s != NULL)
10398 {
10399 if (s->size == 0)
10400 s->flags |= SEC_EXCLUDE;
10401 else
10402 {
10403 s->contents = bfd_zalloc (ibfd, s->size);
10404 if (s->contents == NULL)
10405 return FALSE;
10406 relocs = TRUE;
10407 s->reloc_count = 0;
10408 }
10409 }
10410 }
10411
10412 if (htab->elf.dynamic_sections_created)
10413 {
10414 bfd_boolean tls_opt;
10415
10416 /* Add some entries to the .dynamic section. We fill in the
10417 values later, in ppc64_elf_finish_dynamic_sections, but we
10418 must add the entries now so that we get the correct size for
10419 the .dynamic section. The DT_DEBUG entry is filled in by the
10420 dynamic linker and used by the debugger. */
10421 #define add_dynamic_entry(TAG, VAL) \
10422 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10423
10424 if (bfd_link_executable (info))
10425 {
10426 if (!add_dynamic_entry (DT_DEBUG, 0))
10427 return FALSE;
10428 }
10429
10430 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10431 {
10432 if (!add_dynamic_entry (DT_PLTGOT, 0)
10433 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10434 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10435 || !add_dynamic_entry (DT_JMPREL, 0)
10436 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10437 return FALSE;
10438 }
10439
10440 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10441 {
10442 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10443 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10444 return FALSE;
10445 }
10446
10447 tls_opt = (htab->params->tls_get_addr_opt
10448 && htab->tls_get_addr_fd != NULL
10449 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10450 if (tls_opt || !htab->opd_abi)
10451 {
10452 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10453 return FALSE;
10454 }
10455
10456 if (relocs)
10457 {
10458 if (!add_dynamic_entry (DT_RELA, 0)
10459 || !add_dynamic_entry (DT_RELASZ, 0)
10460 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10461 return FALSE;
10462
10463 /* If any dynamic relocs apply to a read-only section,
10464 then we need a DT_TEXTREL entry. */
10465 if ((info->flags & DF_TEXTREL) == 0)
10466 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10467
10468 if ((info->flags & DF_TEXTREL) != 0)
10469 {
10470 if (!add_dynamic_entry (DT_TEXTREL, 0))
10471 return FALSE;
10472 }
10473 }
10474 }
10475 #undef add_dynamic_entry
10476
10477 return TRUE;
10478 }
10479
10480 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10481
10482 static bfd_boolean
10483 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10484 {
10485 if (h->plt.plist != NULL
10486 && !h->def_regular
10487 && !h->pointer_equality_needed)
10488 return FALSE;
10489
10490 return _bfd_elf_hash_symbol (h);
10491 }
10492
10493 /* Determine the type of stub needed, if any, for a call. */
10494
10495 static inline enum ppc_stub_type
10496 ppc_type_of_stub (asection *input_sec,
10497 const Elf_Internal_Rela *rel,
10498 struct ppc_link_hash_entry **hash,
10499 struct plt_entry **plt_ent,
10500 bfd_vma destination,
10501 unsigned long local_off)
10502 {
10503 struct ppc_link_hash_entry *h = *hash;
10504 bfd_vma location;
10505 bfd_vma branch_offset;
10506 bfd_vma max_branch_offset;
10507 enum elf_ppc64_reloc_type r_type;
10508
10509 if (h != NULL)
10510 {
10511 struct plt_entry *ent;
10512 struct ppc_link_hash_entry *fdh = h;
10513 if (h->oh != NULL
10514 && h->oh->is_func_descriptor)
10515 {
10516 fdh = ppc_follow_link (h->oh);
10517 *hash = fdh;
10518 }
10519
10520 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10521 if (ent->addend == rel->r_addend
10522 && ent->plt.offset != (bfd_vma) -1)
10523 {
10524 *plt_ent = ent;
10525 return ppc_stub_plt_call;
10526 }
10527
10528 /* Here, we know we don't have a plt entry. If we don't have a
10529 either a defined function descriptor or a defined entry symbol
10530 in a regular object file, then it is pointless trying to make
10531 any other type of stub. */
10532 if (!is_static_defined (&fdh->elf)
10533 && !is_static_defined (&h->elf))
10534 return ppc_stub_none;
10535 }
10536 else if (elf_local_got_ents (input_sec->owner) != NULL)
10537 {
10538 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10539 struct plt_entry **local_plt = (struct plt_entry **)
10540 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10541 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10542
10543 if (local_plt[r_symndx] != NULL)
10544 {
10545 struct plt_entry *ent;
10546
10547 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10548 if (ent->addend == rel->r_addend
10549 && ent->plt.offset != (bfd_vma) -1)
10550 {
10551 *plt_ent = ent;
10552 return ppc_stub_plt_call;
10553 }
10554 }
10555 }
10556
10557 /* Determine where the call point is. */
10558 location = (input_sec->output_offset
10559 + input_sec->output_section->vma
10560 + rel->r_offset);
10561
10562 branch_offset = destination - location;
10563 r_type = ELF64_R_TYPE (rel->r_info);
10564
10565 /* Determine if a long branch stub is needed. */
10566 max_branch_offset = 1 << 25;
10567 if (r_type != R_PPC64_REL24)
10568 max_branch_offset = 1 << 15;
10569
10570 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10571 /* We need a stub. Figure out whether a long_branch or plt_branch
10572 is needed later. */
10573 return ppc_stub_long_branch;
10574
10575 return ppc_stub_none;
10576 }
10577
10578 /* With power7 weakly ordered memory model, it is possible for ld.so
10579 to update a plt entry in one thread and have another thread see a
10580 stale zero toc entry. To avoid this we need some sort of acquire
10581 barrier in the call stub. One solution is to make the load of the
10582 toc word seem to appear to depend on the load of the function entry
10583 word. Another solution is to test for r2 being zero, and branch to
10584 the appropriate glink entry if so.
10585
10586 . fake dep barrier compare
10587 . ld 12,xxx(2) ld 12,xxx(2)
10588 . mtctr 12 mtctr 12
10589 . xor 11,12,12 ld 2,xxx+8(2)
10590 . add 2,2,11 cmpldi 2,0
10591 . ld 2,xxx+8(2) bnectr+
10592 . bctr b <glink_entry>
10593
10594 The solution involving the compare turns out to be faster, so
10595 that's what we use unless the branch won't reach. */
10596
10597 #define ALWAYS_USE_FAKE_DEP 0
10598 #define ALWAYS_EMIT_R2SAVE 0
10599
10600 #define PPC_LO(v) ((v) & 0xffff)
10601 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10602 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10603
10604 static inline unsigned int
10605 plt_stub_size (struct ppc_link_hash_table *htab,
10606 struct ppc_stub_hash_entry *stub_entry,
10607 bfd_vma off)
10608 {
10609 unsigned size = 12;
10610
10611 if (ALWAYS_EMIT_R2SAVE
10612 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10613 size += 4;
10614 if (PPC_HA (off) != 0)
10615 size += 4;
10616 if (htab->opd_abi)
10617 {
10618 size += 4;
10619 if (htab->params->plt_static_chain)
10620 size += 4;
10621 if (htab->params->plt_thread_safe
10622 && htab->elf.dynamic_sections_created
10623 && stub_entry->h != NULL
10624 && stub_entry->h->elf.dynindx != -1)
10625 size += 8;
10626 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10627 size += 4;
10628 }
10629 if (stub_entry->h != NULL
10630 && (stub_entry->h == htab->tls_get_addr_fd
10631 || stub_entry->h == htab->tls_get_addr)
10632 && htab->params->tls_get_addr_opt)
10633 {
10634 size += 7 * 4;
10635 if (ALWAYS_EMIT_R2SAVE
10636 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10637 size += 6 * 4;
10638 }
10639 return size;
10640 }
10641
10642 /* Depending on the sign of plt_stub_align:
10643 If positive, return the padding to align to a 2**plt_stub_align
10644 boundary.
10645 If negative, if this stub would cross fewer 2**plt_stub_align
10646 boundaries if we align, then return the padding needed to do so. */
10647
10648 static inline unsigned int
10649 plt_stub_pad (struct ppc_link_hash_table *htab,
10650 struct ppc_stub_hash_entry *stub_entry,
10651 bfd_vma plt_off)
10652 {
10653 int stub_align;
10654 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10655 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10656
10657 if (htab->params->plt_stub_align >= 0)
10658 {
10659 stub_align = 1 << htab->params->plt_stub_align;
10660 if ((stub_off & (stub_align - 1)) != 0)
10661 return stub_align - (stub_off & (stub_align - 1));
10662 return 0;
10663 }
10664
10665 stub_align = 1 << -htab->params->plt_stub_align;
10666 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10667 > ((stub_size - 1) & -stub_align))
10668 return stub_align - (stub_off & (stub_align - 1));
10669 return 0;
10670 }
10671
10672 /* Build a .plt call stub. */
10673
10674 static inline bfd_byte *
10675 build_plt_stub (struct ppc_link_hash_table *htab,
10676 struct ppc_stub_hash_entry *stub_entry,
10677 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10678 {
10679 bfd *obfd = htab->params->stub_bfd;
10680 bfd_boolean plt_load_toc = htab->opd_abi;
10681 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10682 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10683 && htab->elf.dynamic_sections_created
10684 && stub_entry->h != NULL
10685 && stub_entry->h->elf.dynindx != -1);
10686 bfd_boolean use_fake_dep = plt_thread_safe;
10687 bfd_vma cmp_branch_off = 0;
10688
10689 if (!ALWAYS_USE_FAKE_DEP
10690 && plt_load_toc
10691 && plt_thread_safe
10692 && !((stub_entry->h == htab->tls_get_addr_fd
10693 || stub_entry->h == htab->tls_get_addr)
10694 && htab->params->tls_get_addr_opt))
10695 {
10696 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10697 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10698 / PLT_ENTRY_SIZE (htab));
10699 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10700 bfd_vma to, from;
10701
10702 if (pltindex > 32768)
10703 glinkoff += (pltindex - 32768) * 4;
10704 to = (glinkoff
10705 + htab->glink->output_offset
10706 + htab->glink->output_section->vma);
10707 from = (p - stub_entry->group->stub_sec->contents
10708 + 4 * (ALWAYS_EMIT_R2SAVE
10709 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10710 + 4 * (PPC_HA (offset) != 0)
10711 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10712 != PPC_HA (offset))
10713 + 4 * (plt_static_chain != 0)
10714 + 20
10715 + stub_entry->group->stub_sec->output_offset
10716 + stub_entry->group->stub_sec->output_section->vma);
10717 cmp_branch_off = to - from;
10718 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10719 }
10720
10721 if (PPC_HA (offset) != 0)
10722 {
10723 if (r != NULL)
10724 {
10725 if (ALWAYS_EMIT_R2SAVE
10726 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10727 r[0].r_offset += 4;
10728 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10729 r[1].r_offset = r[0].r_offset + 4;
10730 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10731 r[1].r_addend = r[0].r_addend;
10732 if (plt_load_toc)
10733 {
10734 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10735 {
10736 r[2].r_offset = r[1].r_offset + 4;
10737 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10738 r[2].r_addend = r[0].r_addend;
10739 }
10740 else
10741 {
10742 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10743 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10744 r[2].r_addend = r[0].r_addend + 8;
10745 if (plt_static_chain)
10746 {
10747 r[3].r_offset = r[2].r_offset + 4;
10748 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10749 r[3].r_addend = r[0].r_addend + 16;
10750 }
10751 }
10752 }
10753 }
10754 if (ALWAYS_EMIT_R2SAVE
10755 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10756 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10757 if (plt_load_toc)
10758 {
10759 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10760 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10761 }
10762 else
10763 {
10764 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10765 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10766 }
10767 if (plt_load_toc
10768 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10769 {
10770 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10771 offset = 0;
10772 }
10773 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10774 if (plt_load_toc)
10775 {
10776 if (use_fake_dep)
10777 {
10778 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10779 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10780 }
10781 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10782 if (plt_static_chain)
10783 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10784 }
10785 }
10786 else
10787 {
10788 if (r != NULL)
10789 {
10790 if (ALWAYS_EMIT_R2SAVE
10791 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10792 r[0].r_offset += 4;
10793 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10794 if (plt_load_toc)
10795 {
10796 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10797 {
10798 r[1].r_offset = r[0].r_offset + 4;
10799 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10800 r[1].r_addend = r[0].r_addend;
10801 }
10802 else
10803 {
10804 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10805 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10806 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10807 if (plt_static_chain)
10808 {
10809 r[2].r_offset = r[1].r_offset + 4;
10810 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10811 r[2].r_addend = r[0].r_addend + 8;
10812 }
10813 }
10814 }
10815 }
10816 if (ALWAYS_EMIT_R2SAVE
10817 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10818 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10819 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10820 if (plt_load_toc
10821 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10822 {
10823 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10824 offset = 0;
10825 }
10826 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10827 if (plt_load_toc)
10828 {
10829 if (use_fake_dep)
10830 {
10831 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10832 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10833 }
10834 if (plt_static_chain)
10835 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10836 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10837 }
10838 }
10839 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10840 {
10841 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10842 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10843 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10844 }
10845 else
10846 bfd_put_32 (obfd, BCTR, p), p += 4;
10847 return p;
10848 }
10849
10850 /* Build a special .plt call stub for __tls_get_addr. */
10851
10852 #define LD_R11_0R3 0xe9630000
10853 #define LD_R12_0R3 0xe9830000
10854 #define MR_R0_R3 0x7c601b78
10855 #define CMPDI_R11_0 0x2c2b0000
10856 #define ADD_R3_R12_R13 0x7c6c6a14
10857 #define BEQLR 0x4d820020
10858 #define MR_R3_R0 0x7c030378
10859 #define STD_R11_0R1 0xf9610000
10860 #define BCTRL 0x4e800421
10861 #define LD_R11_0R1 0xe9610000
10862 #define MTLR_R11 0x7d6803a6
10863
10864 static inline bfd_byte *
10865 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10866 struct ppc_stub_hash_entry *stub_entry,
10867 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10868 {
10869 bfd *obfd = htab->params->stub_bfd;
10870
10871 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10872 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10873 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10874 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10875 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10876 bfd_put_32 (obfd, BEQLR, p), p += 4;
10877 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10878 if (r != NULL)
10879 r[0].r_offset += 7 * 4;
10880 if (!ALWAYS_EMIT_R2SAVE
10881 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10882 return build_plt_stub (htab, stub_entry, p, offset, r);
10883
10884 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10885 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10886
10887 if (r != NULL)
10888 r[0].r_offset += 2 * 4;
10889 p = build_plt_stub (htab, stub_entry, p, offset, r);
10890 bfd_put_32 (obfd, BCTRL, p - 4);
10891
10892 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10893 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10894 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10895 bfd_put_32 (obfd, BLR, p), p += 4;
10896
10897 return p;
10898 }
10899
10900 static Elf_Internal_Rela *
10901 get_relocs (asection *sec, int count)
10902 {
10903 Elf_Internal_Rela *relocs;
10904 struct bfd_elf_section_data *elfsec_data;
10905
10906 elfsec_data = elf_section_data (sec);
10907 relocs = elfsec_data->relocs;
10908 if (relocs == NULL)
10909 {
10910 bfd_size_type relsize;
10911 relsize = sec->reloc_count * sizeof (*relocs);
10912 relocs = bfd_alloc (sec->owner, relsize);
10913 if (relocs == NULL)
10914 return NULL;
10915 elfsec_data->relocs = relocs;
10916 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10917 sizeof (Elf_Internal_Shdr));
10918 if (elfsec_data->rela.hdr == NULL)
10919 return NULL;
10920 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10921 * sizeof (Elf64_External_Rela));
10922 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10923 sec->reloc_count = 0;
10924 }
10925 relocs += sec->reloc_count;
10926 sec->reloc_count += count;
10927 return relocs;
10928 }
10929
10930 static bfd_vma
10931 get_r2off (struct bfd_link_info *info,
10932 struct ppc_stub_hash_entry *stub_entry)
10933 {
10934 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10935 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10936
10937 if (r2off == 0)
10938 {
10939 /* Support linking -R objects. Get the toc pointer from the
10940 opd entry. */
10941 char buf[8];
10942 if (!htab->opd_abi)
10943 return r2off;
10944 asection *opd = stub_entry->h->elf.root.u.def.section;
10945 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10946
10947 if (strcmp (opd->name, ".opd") != 0
10948 || opd->reloc_count != 0)
10949 {
10950 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10951 stub_entry->h->elf.root.root.string);
10952 bfd_set_error (bfd_error_bad_value);
10953 return (bfd_vma) -1;
10954 }
10955 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10956 return (bfd_vma) -1;
10957 r2off = bfd_get_64 (opd->owner, buf);
10958 r2off -= elf_gp (info->output_bfd);
10959 }
10960 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10961 return r2off;
10962 }
10963
10964 static bfd_boolean
10965 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10966 {
10967 struct ppc_stub_hash_entry *stub_entry;
10968 struct ppc_branch_hash_entry *br_entry;
10969 struct bfd_link_info *info;
10970 struct ppc_link_hash_table *htab;
10971 bfd_byte *loc;
10972 bfd_byte *p;
10973 bfd_vma dest, off;
10974 int size;
10975 Elf_Internal_Rela *r;
10976 asection *plt;
10977
10978 /* Massage our args to the form they really have. */
10979 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10980 info = in_arg;
10981
10982 htab = ppc_hash_table (info);
10983 if (htab == NULL)
10984 return FALSE;
10985
10986 /* Make a note of the offset within the stubs for this entry. */
10987 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10988 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10989
10990 htab->stub_count[stub_entry->stub_type - 1] += 1;
10991 switch (stub_entry->stub_type)
10992 {
10993 case ppc_stub_long_branch:
10994 case ppc_stub_long_branch_r2off:
10995 /* Branches are relative. This is where we are going to. */
10996 dest = (stub_entry->target_value
10997 + stub_entry->target_section->output_offset
10998 + stub_entry->target_section->output_section->vma);
10999 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11000 off = dest;
11001
11002 /* And this is where we are coming from. */
11003 off -= (stub_entry->stub_offset
11004 + stub_entry->group->stub_sec->output_offset
11005 + stub_entry->group->stub_sec->output_section->vma);
11006
11007 size = 4;
11008 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11009 {
11010 bfd_vma r2off = get_r2off (info, stub_entry);
11011
11012 if (r2off == (bfd_vma) -1)
11013 {
11014 htab->stub_error = TRUE;
11015 return FALSE;
11016 }
11017 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11018 loc += 4;
11019 size = 8;
11020 if (PPC_HA (r2off) != 0)
11021 {
11022 bfd_put_32 (htab->params->stub_bfd,
11023 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11024 loc += 4;
11025 size += 4;
11026 }
11027 if (PPC_LO (r2off) != 0)
11028 {
11029 bfd_put_32 (htab->params->stub_bfd,
11030 ADDI_R2_R2 | PPC_LO (r2off), loc);
11031 loc += 4;
11032 size += 4;
11033 }
11034 off -= size - 4;
11035 }
11036 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
11037
11038 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
11039 {
11040 info->callbacks->einfo
11041 (_("%P: long branch stub `%s' offset overflow\n"),
11042 stub_entry->root.string);
11043 htab->stub_error = TRUE;
11044 return FALSE;
11045 }
11046
11047 if (info->emitrelocations)
11048 {
11049 r = get_relocs (stub_entry->group->stub_sec, 1);
11050 if (r == NULL)
11051 return FALSE;
11052 r->r_offset = loc - stub_entry->group->stub_sec->contents;
11053 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
11054 r->r_addend = dest;
11055 if (stub_entry->h != NULL)
11056 {
11057 struct elf_link_hash_entry **hashes;
11058 unsigned long symndx;
11059 struct ppc_link_hash_entry *h;
11060
11061 hashes = elf_sym_hashes (htab->params->stub_bfd);
11062 if (hashes == NULL)
11063 {
11064 bfd_size_type hsize;
11065
11066 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
11067 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
11068 if (hashes == NULL)
11069 return FALSE;
11070 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11071 htab->stub_globals = 1;
11072 }
11073 symndx = htab->stub_globals++;
11074 h = stub_entry->h;
11075 hashes[symndx] = &h->elf;
11076 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11077 if (h->oh != NULL && h->oh->is_func)
11078 h = ppc_follow_link (h->oh);
11079 if (h->elf.root.u.def.section != stub_entry->target_section)
11080 /* H is an opd symbol. The addend must be zero. */
11081 r->r_addend = 0;
11082 else
11083 {
11084 off = (h->elf.root.u.def.value
11085 + h->elf.root.u.def.section->output_offset
11086 + h->elf.root.u.def.section->output_section->vma);
11087 r->r_addend -= off;
11088 }
11089 }
11090 }
11091 break;
11092
11093 case ppc_stub_plt_branch:
11094 case ppc_stub_plt_branch_r2off:
11095 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11096 stub_entry->root.string + 9,
11097 FALSE, FALSE);
11098 if (br_entry == NULL)
11099 {
11100 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
11101 stub_entry->root.string);
11102 htab->stub_error = TRUE;
11103 return FALSE;
11104 }
11105
11106 dest = (stub_entry->target_value
11107 + stub_entry->target_section->output_offset
11108 + stub_entry->target_section->output_section->vma);
11109 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11110 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11111
11112 bfd_put_64 (htab->brlt->owner, dest,
11113 htab->brlt->contents + br_entry->offset);
11114
11115 if (br_entry->iter == htab->stub_iteration)
11116 {
11117 br_entry->iter = 0;
11118
11119 if (htab->relbrlt != NULL)
11120 {
11121 /* Create a reloc for the branch lookup table entry. */
11122 Elf_Internal_Rela rela;
11123 bfd_byte *rl;
11124
11125 rela.r_offset = (br_entry->offset
11126 + htab->brlt->output_offset
11127 + htab->brlt->output_section->vma);
11128 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11129 rela.r_addend = dest;
11130
11131 rl = htab->relbrlt->contents;
11132 rl += (htab->relbrlt->reloc_count++
11133 * sizeof (Elf64_External_Rela));
11134 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11135 }
11136 else if (info->emitrelocations)
11137 {
11138 r = get_relocs (htab->brlt, 1);
11139 if (r == NULL)
11140 return FALSE;
11141 /* brlt, being SEC_LINKER_CREATED does not go through the
11142 normal reloc processing. Symbols and offsets are not
11143 translated from input file to output file form, so
11144 set up the offset per the output file. */
11145 r->r_offset = (br_entry->offset
11146 + htab->brlt->output_offset
11147 + htab->brlt->output_section->vma);
11148 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11149 r->r_addend = dest;
11150 }
11151 }
11152
11153 dest = (br_entry->offset
11154 + htab->brlt->output_offset
11155 + htab->brlt->output_section->vma);
11156
11157 off = (dest
11158 - elf_gp (htab->brlt->output_section->owner)
11159 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11160
11161 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11162 {
11163 info->callbacks->einfo
11164 (_("%P: linkage table error against `%T'\n"),
11165 stub_entry->root.string);
11166 bfd_set_error (bfd_error_bad_value);
11167 htab->stub_error = TRUE;
11168 return FALSE;
11169 }
11170
11171 if (info->emitrelocations)
11172 {
11173 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11174 if (r == NULL)
11175 return FALSE;
11176 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11177 if (bfd_big_endian (info->output_bfd))
11178 r[0].r_offset += 2;
11179 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11180 r[0].r_offset += 4;
11181 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11182 r[0].r_addend = dest;
11183 if (PPC_HA (off) != 0)
11184 {
11185 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11186 r[1].r_offset = r[0].r_offset + 4;
11187 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11188 r[1].r_addend = r[0].r_addend;
11189 }
11190 }
11191
11192 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11193 {
11194 if (PPC_HA (off) != 0)
11195 {
11196 size = 16;
11197 bfd_put_32 (htab->params->stub_bfd,
11198 ADDIS_R12_R2 | PPC_HA (off), loc);
11199 loc += 4;
11200 bfd_put_32 (htab->params->stub_bfd,
11201 LD_R12_0R12 | PPC_LO (off), loc);
11202 }
11203 else
11204 {
11205 size = 12;
11206 bfd_put_32 (htab->params->stub_bfd,
11207 LD_R12_0R2 | PPC_LO (off), loc);
11208 }
11209 }
11210 else
11211 {
11212 bfd_vma r2off = get_r2off (info, stub_entry);
11213
11214 if (r2off == (bfd_vma) -1)
11215 {
11216 htab->stub_error = TRUE;
11217 return FALSE;
11218 }
11219
11220 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11221 loc += 4;
11222 size = 16;
11223 if (PPC_HA (off) != 0)
11224 {
11225 size += 4;
11226 bfd_put_32 (htab->params->stub_bfd,
11227 ADDIS_R12_R2 | PPC_HA (off), loc);
11228 loc += 4;
11229 bfd_put_32 (htab->params->stub_bfd,
11230 LD_R12_0R12 | PPC_LO (off), loc);
11231 }
11232 else
11233 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11234
11235 if (PPC_HA (r2off) != 0)
11236 {
11237 size += 4;
11238 loc += 4;
11239 bfd_put_32 (htab->params->stub_bfd,
11240 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11241 }
11242 if (PPC_LO (r2off) != 0)
11243 {
11244 size += 4;
11245 loc += 4;
11246 bfd_put_32 (htab->params->stub_bfd,
11247 ADDI_R2_R2 | PPC_LO (r2off), loc);
11248 }
11249 }
11250 loc += 4;
11251 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11252 loc += 4;
11253 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11254 break;
11255
11256 case ppc_stub_plt_call:
11257 case ppc_stub_plt_call_r2save:
11258 if (stub_entry->h != NULL
11259 && stub_entry->h->is_func_descriptor
11260 && stub_entry->h->oh != NULL)
11261 {
11262 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11263
11264 /* If the old-ABI "dot-symbol" is undefined make it weak so
11265 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11266 if (fh->elf.root.type == bfd_link_hash_undefined
11267 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11268 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11269 fh->elf.root.type = bfd_link_hash_undefweak;
11270 }
11271
11272 /* Now build the stub. */
11273 dest = stub_entry->plt_ent->plt.offset & ~1;
11274 if (dest >= (bfd_vma) -2)
11275 abort ();
11276
11277 plt = htab->elf.splt;
11278 if (!htab->elf.dynamic_sections_created
11279 || stub_entry->h == NULL
11280 || stub_entry->h->elf.dynindx == -1)
11281 plt = htab->elf.iplt;
11282
11283 dest += plt->output_offset + plt->output_section->vma;
11284
11285 if (stub_entry->h == NULL
11286 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11287 {
11288 Elf_Internal_Rela rela;
11289 bfd_byte *rl;
11290
11291 rela.r_offset = dest;
11292 if (htab->opd_abi)
11293 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11294 else
11295 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11296 rela.r_addend = (stub_entry->target_value
11297 + stub_entry->target_section->output_offset
11298 + stub_entry->target_section->output_section->vma);
11299
11300 rl = (htab->elf.irelplt->contents
11301 + (htab->elf.irelplt->reloc_count++
11302 * sizeof (Elf64_External_Rela)));
11303 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11304 stub_entry->plt_ent->plt.offset |= 1;
11305 htab->local_ifunc_resolver = 1;
11306 }
11307
11308 off = (dest
11309 - elf_gp (plt->output_section->owner)
11310 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11311
11312 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11313 {
11314 info->callbacks->einfo
11315 /* xgettext:c-format */
11316 (_("%P: linkage table error against `%T'\n"),
11317 stub_entry->h != NULL
11318 ? stub_entry->h->elf.root.root.string
11319 : "<local sym>");
11320 bfd_set_error (bfd_error_bad_value);
11321 htab->stub_error = TRUE;
11322 return FALSE;
11323 }
11324
11325 if (htab->params->plt_stub_align != 0)
11326 {
11327 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11328
11329 stub_entry->group->stub_sec->size += pad;
11330 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11331 loc += pad;
11332 }
11333
11334 r = NULL;
11335 if (info->emitrelocations)
11336 {
11337 r = get_relocs (stub_entry->group->stub_sec,
11338 ((PPC_HA (off) != 0)
11339 + (htab->opd_abi
11340 ? 2 + (htab->params->plt_static_chain
11341 && PPC_HA (off + 16) == PPC_HA (off))
11342 : 1)));
11343 if (r == NULL)
11344 return FALSE;
11345 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11346 if (bfd_big_endian (info->output_bfd))
11347 r[0].r_offset += 2;
11348 r[0].r_addend = dest;
11349 }
11350 if (stub_entry->h != NULL
11351 && (stub_entry->h == htab->tls_get_addr_fd
11352 || stub_entry->h == htab->tls_get_addr)
11353 && htab->params->tls_get_addr_opt)
11354 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11355 else
11356 p = build_plt_stub (htab, stub_entry, loc, off, r);
11357 size = p - loc;
11358 break;
11359
11360 case ppc_stub_save_res:
11361 return TRUE;
11362
11363 default:
11364 BFD_FAIL ();
11365 return FALSE;
11366 }
11367
11368 stub_entry->group->stub_sec->size += size;
11369
11370 if (htab->params->emit_stub_syms)
11371 {
11372 struct elf_link_hash_entry *h;
11373 size_t len1, len2;
11374 char *name;
11375 const char *const stub_str[] = { "long_branch",
11376 "long_branch_r2off",
11377 "plt_branch",
11378 "plt_branch_r2off",
11379 "plt_call",
11380 "plt_call" };
11381
11382 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11383 len2 = strlen (stub_entry->root.string);
11384 name = bfd_malloc (len1 + len2 + 2);
11385 if (name == NULL)
11386 return FALSE;
11387 memcpy (name, stub_entry->root.string, 9);
11388 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11389 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11390 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11391 if (h == NULL)
11392 return FALSE;
11393 if (h->root.type == bfd_link_hash_new)
11394 {
11395 h->root.type = bfd_link_hash_defined;
11396 h->root.u.def.section = stub_entry->group->stub_sec;
11397 h->root.u.def.value = stub_entry->stub_offset;
11398 h->ref_regular = 1;
11399 h->def_regular = 1;
11400 h->ref_regular_nonweak = 1;
11401 h->forced_local = 1;
11402 h->non_elf = 0;
11403 h->root.linker_def = 1;
11404 }
11405 }
11406
11407 return TRUE;
11408 }
11409
11410 /* As above, but don't actually build the stub. Just bump offset so
11411 we know stub section sizes, and select plt_branch stubs where
11412 long_branch stubs won't do. */
11413
11414 static bfd_boolean
11415 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11416 {
11417 struct ppc_stub_hash_entry *stub_entry;
11418 struct bfd_link_info *info;
11419 struct ppc_link_hash_table *htab;
11420 bfd_vma off;
11421 int size;
11422
11423 /* Massage our args to the form they really have. */
11424 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11425 info = in_arg;
11426
11427 htab = ppc_hash_table (info);
11428 if (htab == NULL)
11429 return FALSE;
11430
11431 if (stub_entry->h != NULL
11432 && stub_entry->h->save_res
11433 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11434 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11435 {
11436 /* Don't make stubs to out-of-line register save/restore
11437 functions. Instead, emit copies of the functions. */
11438 stub_entry->group->needs_save_res = 1;
11439 stub_entry->stub_type = ppc_stub_save_res;
11440 return TRUE;
11441 }
11442
11443 if (stub_entry->stub_type == ppc_stub_plt_call
11444 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11445 {
11446 asection *plt;
11447 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11448 if (off >= (bfd_vma) -2)
11449 abort ();
11450 plt = htab->elf.splt;
11451 if (!htab->elf.dynamic_sections_created
11452 || stub_entry->h == NULL
11453 || stub_entry->h->elf.dynindx == -1)
11454 plt = htab->elf.iplt;
11455 off += (plt->output_offset
11456 + plt->output_section->vma
11457 - elf_gp (plt->output_section->owner)
11458 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11459
11460 size = plt_stub_size (htab, stub_entry, off);
11461 if (stub_entry->h != NULL
11462 && (stub_entry->h == htab->tls_get_addr_fd
11463 || stub_entry->h == htab->tls_get_addr)
11464 && htab->params->tls_get_addr_opt
11465 && (ALWAYS_EMIT_R2SAVE
11466 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11467 stub_entry->group->tls_get_addr_opt_bctrl
11468 = stub_entry->group->stub_sec->size + size - 5 * 4;
11469
11470 if (htab->params->plt_stub_align)
11471 size += plt_stub_pad (htab, stub_entry, off);
11472 if (info->emitrelocations)
11473 {
11474 stub_entry->group->stub_sec->reloc_count
11475 += ((PPC_HA (off) != 0)
11476 + (htab->opd_abi
11477 ? 2 + (htab->params->plt_static_chain
11478 && PPC_HA (off + 16) == PPC_HA (off))
11479 : 1));
11480 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11481 }
11482 }
11483 else
11484 {
11485 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11486 variants. */
11487 bfd_vma r2off = 0;
11488 bfd_vma local_off = 0;
11489
11490 off = (stub_entry->target_value
11491 + stub_entry->target_section->output_offset
11492 + stub_entry->target_section->output_section->vma);
11493 off -= (stub_entry->group->stub_sec->size
11494 + stub_entry->group->stub_sec->output_offset
11495 + stub_entry->group->stub_sec->output_section->vma);
11496
11497 /* Reset the stub type from the plt variant in case we now
11498 can reach with a shorter stub. */
11499 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11500 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11501
11502 size = 4;
11503 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11504 {
11505 r2off = get_r2off (info, stub_entry);
11506 if (r2off == (bfd_vma) -1)
11507 {
11508 htab->stub_error = TRUE;
11509 return FALSE;
11510 }
11511 size = 8;
11512 if (PPC_HA (r2off) != 0)
11513 size += 4;
11514 if (PPC_LO (r2off) != 0)
11515 size += 4;
11516 off -= size - 4;
11517 }
11518
11519 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11520
11521 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11522 Do the same for -R objects without function descriptors. */
11523 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11524 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11525 && r2off == 0
11526 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11527 {
11528 struct ppc_branch_hash_entry *br_entry;
11529
11530 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11531 stub_entry->root.string + 9,
11532 TRUE, FALSE);
11533 if (br_entry == NULL)
11534 {
11535 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11536 stub_entry->root.string);
11537 htab->stub_error = TRUE;
11538 return FALSE;
11539 }
11540
11541 if (br_entry->iter != htab->stub_iteration)
11542 {
11543 br_entry->iter = htab->stub_iteration;
11544 br_entry->offset = htab->brlt->size;
11545 htab->brlt->size += 8;
11546
11547 if (htab->relbrlt != NULL)
11548 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11549 else if (info->emitrelocations)
11550 {
11551 htab->brlt->reloc_count += 1;
11552 htab->brlt->flags |= SEC_RELOC;
11553 }
11554 }
11555
11556 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11557 off = (br_entry->offset
11558 + htab->brlt->output_offset
11559 + htab->brlt->output_section->vma
11560 - elf_gp (htab->brlt->output_section->owner)
11561 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11562
11563 if (info->emitrelocations)
11564 {
11565 stub_entry->group->stub_sec->reloc_count
11566 += 1 + (PPC_HA (off) != 0);
11567 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11568 }
11569
11570 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11571 {
11572 size = 12;
11573 if (PPC_HA (off) != 0)
11574 size = 16;
11575 }
11576 else
11577 {
11578 size = 16;
11579 if (PPC_HA (off) != 0)
11580 size += 4;
11581
11582 if (PPC_HA (r2off) != 0)
11583 size += 4;
11584 if (PPC_LO (r2off) != 0)
11585 size += 4;
11586 }
11587 }
11588 else if (info->emitrelocations)
11589 {
11590 stub_entry->group->stub_sec->reloc_count += 1;
11591 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11592 }
11593 }
11594
11595 stub_entry->group->stub_sec->size += size;
11596 return TRUE;
11597 }
11598
11599 /* Set up various things so that we can make a list of input sections
11600 for each output section included in the link. Returns -1 on error,
11601 0 when no stubs will be needed, and 1 on success. */
11602
11603 int
11604 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11605 {
11606 unsigned int id;
11607 bfd_size_type amt;
11608 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11609
11610 if (htab == NULL)
11611 return -1;
11612
11613 htab->sec_info_arr_size = bfd_get_next_section_id ();
11614 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11615 htab->sec_info = bfd_zmalloc (amt);
11616 if (htab->sec_info == NULL)
11617 return -1;
11618
11619 /* Set toc_off for com, und, abs and ind sections. */
11620 for (id = 0; id < 3; id++)
11621 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11622
11623 return 1;
11624 }
11625
11626 /* Set up for first pass at multitoc partitioning. */
11627
11628 void
11629 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11630 {
11631 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11632
11633 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11634 htab->toc_bfd = NULL;
11635 htab->toc_first_sec = NULL;
11636 }
11637
11638 /* The linker repeatedly calls this function for each TOC input section
11639 and linker generated GOT section. Group input bfds such that the toc
11640 within a group is less than 64k in size. */
11641
11642 bfd_boolean
11643 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11644 {
11645 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11646 bfd_vma addr, off, limit;
11647
11648 if (htab == NULL)
11649 return FALSE;
11650
11651 if (!htab->second_toc_pass)
11652 {
11653 /* Keep track of the first .toc or .got section for this input bfd. */
11654 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11655
11656 if (new_bfd)
11657 {
11658 htab->toc_bfd = isec->owner;
11659 htab->toc_first_sec = isec;
11660 }
11661
11662 addr = isec->output_offset + isec->output_section->vma;
11663 off = addr - htab->toc_curr;
11664 limit = 0x80008000;
11665 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11666 limit = 0x10000;
11667 if (off + isec->size > limit)
11668 {
11669 addr = (htab->toc_first_sec->output_offset
11670 + htab->toc_first_sec->output_section->vma);
11671 htab->toc_curr = addr;
11672 htab->toc_curr &= -TOC_BASE_ALIGN;
11673 }
11674
11675 /* toc_curr is the base address of this toc group. Set elf_gp
11676 for the input section to be the offset relative to the
11677 output toc base plus 0x8000. Making the input elf_gp an
11678 offset allows us to move the toc as a whole without
11679 recalculating input elf_gp. */
11680 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11681 off += TOC_BASE_OFF;
11682
11683 /* Die if someone uses a linker script that doesn't keep input
11684 file .toc and .got together. */
11685 if (new_bfd
11686 && elf_gp (isec->owner) != 0
11687 && elf_gp (isec->owner) != off)
11688 return FALSE;
11689
11690 elf_gp (isec->owner) = off;
11691 return TRUE;
11692 }
11693
11694 /* During the second pass toc_first_sec points to the start of
11695 a toc group, and toc_curr is used to track the old elf_gp.
11696 We use toc_bfd to ensure we only look at each bfd once. */
11697 if (htab->toc_bfd == isec->owner)
11698 return TRUE;
11699 htab->toc_bfd = isec->owner;
11700
11701 if (htab->toc_first_sec == NULL
11702 || htab->toc_curr != elf_gp (isec->owner))
11703 {
11704 htab->toc_curr = elf_gp (isec->owner);
11705 htab->toc_first_sec = isec;
11706 }
11707 addr = (htab->toc_first_sec->output_offset
11708 + htab->toc_first_sec->output_section->vma);
11709 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11710 elf_gp (isec->owner) = off;
11711
11712 return TRUE;
11713 }
11714
11715 /* Called via elf_link_hash_traverse to merge GOT entries for global
11716 symbol H. */
11717
11718 static bfd_boolean
11719 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11720 {
11721 if (h->root.type == bfd_link_hash_indirect)
11722 return TRUE;
11723
11724 merge_got_entries (&h->got.glist);
11725
11726 return TRUE;
11727 }
11728
11729 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11730 symbol H. */
11731
11732 static bfd_boolean
11733 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11734 {
11735 struct got_entry *gent;
11736
11737 if (h->root.type == bfd_link_hash_indirect)
11738 return TRUE;
11739
11740 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11741 if (!gent->is_indirect)
11742 allocate_got (h, (struct bfd_link_info *) inf, gent);
11743 return TRUE;
11744 }
11745
11746 /* Called on the first multitoc pass after the last call to
11747 ppc64_elf_next_toc_section. This function removes duplicate GOT
11748 entries. */
11749
11750 bfd_boolean
11751 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11752 {
11753 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11754 struct bfd *ibfd, *ibfd2;
11755 bfd_boolean done_something;
11756
11757 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11758
11759 if (!htab->do_multi_toc)
11760 return FALSE;
11761
11762 /* Merge global sym got entries within a toc group. */
11763 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11764
11765 /* And tlsld_got. */
11766 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11767 {
11768 struct got_entry *ent, *ent2;
11769
11770 if (!is_ppc64_elf (ibfd))
11771 continue;
11772
11773 ent = ppc64_tlsld_got (ibfd);
11774 if (!ent->is_indirect
11775 && ent->got.offset != (bfd_vma) -1)
11776 {
11777 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11778 {
11779 if (!is_ppc64_elf (ibfd2))
11780 continue;
11781
11782 ent2 = ppc64_tlsld_got (ibfd2);
11783 if (!ent2->is_indirect
11784 && ent2->got.offset != (bfd_vma) -1
11785 && elf_gp (ibfd2) == elf_gp (ibfd))
11786 {
11787 ent2->is_indirect = TRUE;
11788 ent2->got.ent = ent;
11789 }
11790 }
11791 }
11792 }
11793
11794 /* Zap sizes of got sections. */
11795 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11796 htab->elf.irelplt->size -= htab->got_reli_size;
11797 htab->got_reli_size = 0;
11798
11799 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11800 {
11801 asection *got, *relgot;
11802
11803 if (!is_ppc64_elf (ibfd))
11804 continue;
11805
11806 got = ppc64_elf_tdata (ibfd)->got;
11807 if (got != NULL)
11808 {
11809 got->rawsize = got->size;
11810 got->size = 0;
11811 relgot = ppc64_elf_tdata (ibfd)->relgot;
11812 relgot->rawsize = relgot->size;
11813 relgot->size = 0;
11814 }
11815 }
11816
11817 /* Now reallocate the got, local syms first. We don't need to
11818 allocate section contents again since we never increase size. */
11819 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11820 {
11821 struct got_entry **lgot_ents;
11822 struct got_entry **end_lgot_ents;
11823 struct plt_entry **local_plt;
11824 struct plt_entry **end_local_plt;
11825 unsigned char *lgot_masks;
11826 bfd_size_type locsymcount;
11827 Elf_Internal_Shdr *symtab_hdr;
11828 asection *s;
11829
11830 if (!is_ppc64_elf (ibfd))
11831 continue;
11832
11833 lgot_ents = elf_local_got_ents (ibfd);
11834 if (!lgot_ents)
11835 continue;
11836
11837 symtab_hdr = &elf_symtab_hdr (ibfd);
11838 locsymcount = symtab_hdr->sh_info;
11839 end_lgot_ents = lgot_ents + locsymcount;
11840 local_plt = (struct plt_entry **) end_lgot_ents;
11841 end_local_plt = local_plt + locsymcount;
11842 lgot_masks = (unsigned char *) end_local_plt;
11843 s = ppc64_elf_tdata (ibfd)->got;
11844 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11845 {
11846 struct got_entry *ent;
11847
11848 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11849 {
11850 unsigned int ent_size = 8;
11851 unsigned int rel_size = sizeof (Elf64_External_Rela);
11852
11853 ent->got.offset = s->size;
11854 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11855 {
11856 ent_size *= 2;
11857 rel_size *= 2;
11858 }
11859 s->size += ent_size;
11860 if ((*lgot_masks & PLT_IFUNC) != 0)
11861 {
11862 htab->elf.irelplt->size += rel_size;
11863 htab->got_reli_size += rel_size;
11864 }
11865 else if (bfd_link_pic (info))
11866 {
11867 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11868 srel->size += rel_size;
11869 }
11870 }
11871 }
11872 }
11873
11874 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11875
11876 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11877 {
11878 struct got_entry *ent;
11879
11880 if (!is_ppc64_elf (ibfd))
11881 continue;
11882
11883 ent = ppc64_tlsld_got (ibfd);
11884 if (!ent->is_indirect
11885 && ent->got.offset != (bfd_vma) -1)
11886 {
11887 asection *s = ppc64_elf_tdata (ibfd)->got;
11888 ent->got.offset = s->size;
11889 s->size += 16;
11890 if (bfd_link_pic (info))
11891 {
11892 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11893 srel->size += sizeof (Elf64_External_Rela);
11894 }
11895 }
11896 }
11897
11898 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11899 if (!done_something)
11900 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11901 {
11902 asection *got;
11903
11904 if (!is_ppc64_elf (ibfd))
11905 continue;
11906
11907 got = ppc64_elf_tdata (ibfd)->got;
11908 if (got != NULL)
11909 {
11910 done_something = got->rawsize != got->size;
11911 if (done_something)
11912 break;
11913 }
11914 }
11915
11916 if (done_something)
11917 (*htab->params->layout_sections_again) ();
11918
11919 /* Set up for second pass over toc sections to recalculate elf_gp
11920 on input sections. */
11921 htab->toc_bfd = NULL;
11922 htab->toc_first_sec = NULL;
11923 htab->second_toc_pass = TRUE;
11924 return done_something;
11925 }
11926
11927 /* Called after second pass of multitoc partitioning. */
11928
11929 void
11930 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11931 {
11932 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11933
11934 /* After the second pass, toc_curr tracks the TOC offset used
11935 for code sections below in ppc64_elf_next_input_section. */
11936 htab->toc_curr = TOC_BASE_OFF;
11937 }
11938
11939 /* No toc references were found in ISEC. If the code in ISEC makes no
11940 calls, then there's no need to use toc adjusting stubs when branching
11941 into ISEC. Actually, indirect calls from ISEC are OK as they will
11942 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11943 needed, and 2 if a cyclical call-graph was found but no other reason
11944 for a stub was detected. If called from the top level, a return of
11945 2 means the same as a return of 0. */
11946
11947 static int
11948 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11949 {
11950 int ret;
11951
11952 /* Mark this section as checked. */
11953 isec->call_check_done = 1;
11954
11955 /* We know none of our code bearing sections will need toc stubs. */
11956 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11957 return 0;
11958
11959 if (isec->size == 0)
11960 return 0;
11961
11962 if (isec->output_section == NULL)
11963 return 0;
11964
11965 ret = 0;
11966 if (isec->reloc_count != 0)
11967 {
11968 Elf_Internal_Rela *relstart, *rel;
11969 Elf_Internal_Sym *local_syms;
11970 struct ppc_link_hash_table *htab;
11971
11972 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11973 info->keep_memory);
11974 if (relstart == NULL)
11975 return -1;
11976
11977 /* Look for branches to outside of this section. */
11978 local_syms = NULL;
11979 htab = ppc_hash_table (info);
11980 if (htab == NULL)
11981 return -1;
11982
11983 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11984 {
11985 enum elf_ppc64_reloc_type r_type;
11986 unsigned long r_symndx;
11987 struct elf_link_hash_entry *h;
11988 struct ppc_link_hash_entry *eh;
11989 Elf_Internal_Sym *sym;
11990 asection *sym_sec;
11991 struct _opd_sec_data *opd;
11992 bfd_vma sym_value;
11993 bfd_vma dest;
11994
11995 r_type = ELF64_R_TYPE (rel->r_info);
11996 if (r_type != R_PPC64_REL24
11997 && r_type != R_PPC64_REL14
11998 && r_type != R_PPC64_REL14_BRTAKEN
11999 && r_type != R_PPC64_REL14_BRNTAKEN)
12000 continue;
12001
12002 r_symndx = ELF64_R_SYM (rel->r_info);
12003 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
12004 isec->owner))
12005 {
12006 ret = -1;
12007 break;
12008 }
12009
12010 /* Calls to dynamic lib functions go through a plt call stub
12011 that uses r2. */
12012 eh = (struct ppc_link_hash_entry *) h;
12013 if (eh != NULL
12014 && (eh->elf.plt.plist != NULL
12015 || (eh->oh != NULL
12016 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
12017 {
12018 ret = 1;
12019 break;
12020 }
12021
12022 if (sym_sec == NULL)
12023 /* Ignore other undefined symbols. */
12024 continue;
12025
12026 /* Assume branches to other sections not included in the
12027 link need stubs too, to cover -R and absolute syms. */
12028 if (sym_sec->output_section == NULL)
12029 {
12030 ret = 1;
12031 break;
12032 }
12033
12034 if (h == NULL)
12035 sym_value = sym->st_value;
12036 else
12037 {
12038 if (h->root.type != bfd_link_hash_defined
12039 && h->root.type != bfd_link_hash_defweak)
12040 abort ();
12041 sym_value = h->root.u.def.value;
12042 }
12043 sym_value += rel->r_addend;
12044
12045 /* If this branch reloc uses an opd sym, find the code section. */
12046 opd = get_opd_info (sym_sec);
12047 if (opd != NULL)
12048 {
12049 if (h == NULL && opd->adjust != NULL)
12050 {
12051 long adjust;
12052
12053 adjust = opd->adjust[OPD_NDX (sym_value)];
12054 if (adjust == -1)
12055 /* Assume deleted functions won't ever be called. */
12056 continue;
12057 sym_value += adjust;
12058 }
12059
12060 dest = opd_entry_value (sym_sec, sym_value,
12061 &sym_sec, NULL, FALSE);
12062 if (dest == (bfd_vma) -1)
12063 continue;
12064 }
12065 else
12066 dest = (sym_value
12067 + sym_sec->output_offset
12068 + sym_sec->output_section->vma);
12069
12070 /* Ignore branch to self. */
12071 if (sym_sec == isec)
12072 continue;
12073
12074 /* If the called function uses the toc, we need a stub. */
12075 if (sym_sec->has_toc_reloc
12076 || sym_sec->makes_toc_func_call)
12077 {
12078 ret = 1;
12079 break;
12080 }
12081
12082 /* Assume any branch that needs a long branch stub might in fact
12083 need a plt_branch stub. A plt_branch stub uses r2. */
12084 else if (dest - (isec->output_offset
12085 + isec->output_section->vma
12086 + rel->r_offset) + (1 << 25)
12087 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12088 ? h->other
12089 : sym->st_other))
12090 {
12091 ret = 1;
12092 break;
12093 }
12094
12095 /* If calling back to a section in the process of being
12096 tested, we can't say for sure that no toc adjusting stubs
12097 are needed, so don't return zero. */
12098 else if (sym_sec->call_check_in_progress)
12099 ret = 2;
12100
12101 /* Branches to another section that itself doesn't have any TOC
12102 references are OK. Recursively call ourselves to check. */
12103 else if (!sym_sec->call_check_done)
12104 {
12105 int recur;
12106
12107 /* Mark current section as indeterminate, so that other
12108 sections that call back to current won't be marked as
12109 known. */
12110 isec->call_check_in_progress = 1;
12111 recur = toc_adjusting_stub_needed (info, sym_sec);
12112 isec->call_check_in_progress = 0;
12113
12114 if (recur != 0)
12115 {
12116 ret = recur;
12117 if (recur != 2)
12118 break;
12119 }
12120 }
12121 }
12122
12123 if (local_syms != NULL
12124 && (elf_symtab_hdr (isec->owner).contents
12125 != (unsigned char *) local_syms))
12126 free (local_syms);
12127 if (elf_section_data (isec)->relocs != relstart)
12128 free (relstart);
12129 }
12130
12131 if ((ret & 1) == 0
12132 && isec->map_head.s != NULL
12133 && (strcmp (isec->output_section->name, ".init") == 0
12134 || strcmp (isec->output_section->name, ".fini") == 0))
12135 {
12136 if (isec->map_head.s->has_toc_reloc
12137 || isec->map_head.s->makes_toc_func_call)
12138 ret = 1;
12139 else if (!isec->map_head.s->call_check_done)
12140 {
12141 int recur;
12142 isec->call_check_in_progress = 1;
12143 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12144 isec->call_check_in_progress = 0;
12145 if (recur != 0)
12146 ret = recur;
12147 }
12148 }
12149
12150 if (ret == 1)
12151 isec->makes_toc_func_call = 1;
12152
12153 return ret;
12154 }
12155
12156 /* The linker repeatedly calls this function for each input section,
12157 in the order that input sections are linked into output sections.
12158 Build lists of input sections to determine groupings between which
12159 we may insert linker stubs. */
12160
12161 bfd_boolean
12162 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12163 {
12164 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12165
12166 if (htab == NULL)
12167 return FALSE;
12168
12169 if ((isec->output_section->flags & SEC_CODE) != 0
12170 && isec->output_section->id < htab->sec_info_arr_size)
12171 {
12172 /* This happens to make the list in reverse order,
12173 which is what we want. */
12174 htab->sec_info[isec->id].u.list
12175 = htab->sec_info[isec->output_section->id].u.list;
12176 htab->sec_info[isec->output_section->id].u.list = isec;
12177 }
12178
12179 if (htab->multi_toc_needed)
12180 {
12181 /* Analyse sections that aren't already flagged as needing a
12182 valid toc pointer. Exclude .fixup for the linux kernel.
12183 .fixup contains branches, but only back to the function that
12184 hit an exception. */
12185 if (!(isec->has_toc_reloc
12186 || (isec->flags & SEC_CODE) == 0
12187 || strcmp (isec->name, ".fixup") == 0
12188 || isec->call_check_done))
12189 {
12190 if (toc_adjusting_stub_needed (info, isec) < 0)
12191 return FALSE;
12192 }
12193 /* Make all sections use the TOC assigned for this object file.
12194 This will be wrong for pasted sections; We fix that in
12195 check_pasted_section(). */
12196 if (elf_gp (isec->owner) != 0)
12197 htab->toc_curr = elf_gp (isec->owner);
12198 }
12199
12200 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12201 return TRUE;
12202 }
12203
12204 /* Check that all .init and .fini sections use the same toc, if they
12205 have toc relocs. */
12206
12207 static bfd_boolean
12208 check_pasted_section (struct bfd_link_info *info, const char *name)
12209 {
12210 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12211
12212 if (o != NULL)
12213 {
12214 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12215 bfd_vma toc_off = 0;
12216 asection *i;
12217
12218 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12219 if (i->has_toc_reloc)
12220 {
12221 if (toc_off == 0)
12222 toc_off = htab->sec_info[i->id].toc_off;
12223 else if (toc_off != htab->sec_info[i->id].toc_off)
12224 return FALSE;
12225 }
12226
12227 if (toc_off == 0)
12228 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12229 if (i->makes_toc_func_call)
12230 {
12231 toc_off = htab->sec_info[i->id].toc_off;
12232 break;
12233 }
12234
12235 /* Make sure the whole pasted function uses the same toc offset. */
12236 if (toc_off != 0)
12237 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12238 htab->sec_info[i->id].toc_off = toc_off;
12239 }
12240 return TRUE;
12241 }
12242
12243 bfd_boolean
12244 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12245 {
12246 return (check_pasted_section (info, ".init")
12247 & check_pasted_section (info, ".fini"));
12248 }
12249
12250 /* See whether we can group stub sections together. Grouping stub
12251 sections may result in fewer stubs. More importantly, we need to
12252 put all .init* and .fini* stubs at the beginning of the .init or
12253 .fini output sections respectively, because glibc splits the
12254 _init and _fini functions into multiple parts. Putting a stub in
12255 the middle of a function is not a good idea. */
12256
12257 static bfd_boolean
12258 group_sections (struct bfd_link_info *info,
12259 bfd_size_type stub_group_size,
12260 bfd_boolean stubs_always_before_branch)
12261 {
12262 struct ppc_link_hash_table *htab;
12263 asection *osec;
12264 bfd_boolean suppress_size_errors;
12265
12266 htab = ppc_hash_table (info);
12267 if (htab == NULL)
12268 return FALSE;
12269
12270 suppress_size_errors = FALSE;
12271 if (stub_group_size == 1)
12272 {
12273 /* Default values. */
12274 if (stubs_always_before_branch)
12275 stub_group_size = 0x1e00000;
12276 else
12277 stub_group_size = 0x1c00000;
12278 suppress_size_errors = TRUE;
12279 }
12280
12281 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12282 {
12283 asection *tail;
12284
12285 if (osec->id >= htab->sec_info_arr_size)
12286 continue;
12287
12288 tail = htab->sec_info[osec->id].u.list;
12289 while (tail != NULL)
12290 {
12291 asection *curr;
12292 asection *prev;
12293 bfd_size_type total;
12294 bfd_boolean big_sec;
12295 bfd_vma curr_toc;
12296 struct map_stub *group;
12297 bfd_size_type group_size;
12298
12299 curr = tail;
12300 total = tail->size;
12301 group_size = (ppc64_elf_section_data (tail) != NULL
12302 && ppc64_elf_section_data (tail)->has_14bit_branch
12303 ? stub_group_size >> 10 : stub_group_size);
12304
12305 big_sec = total > group_size;
12306 if (big_sec && !suppress_size_errors)
12307 /* xgettext:c-format */
12308 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12309 tail->owner, tail);
12310 curr_toc = htab->sec_info[tail->id].toc_off;
12311
12312 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12313 && ((total += curr->output_offset - prev->output_offset)
12314 < (ppc64_elf_section_data (prev) != NULL
12315 && ppc64_elf_section_data (prev)->has_14bit_branch
12316 ? (group_size = stub_group_size >> 10) : group_size))
12317 && htab->sec_info[prev->id].toc_off == curr_toc)
12318 curr = prev;
12319
12320 /* OK, the size from the start of CURR to the end is less
12321 than group_size and thus can be handled by one stub
12322 section. (or the tail section is itself larger than
12323 group_size, in which case we may be toast.) We should
12324 really be keeping track of the total size of stubs added
12325 here, as stubs contribute to the final output section
12326 size. That's a little tricky, and this way will only
12327 break if stubs added make the total size more than 2^25,
12328 ie. for the default stub_group_size, if stubs total more
12329 than 2097152 bytes, or nearly 75000 plt call stubs. */
12330 group = bfd_alloc (curr->owner, sizeof (*group));
12331 if (group == NULL)
12332 return FALSE;
12333 group->link_sec = curr;
12334 group->stub_sec = NULL;
12335 group->needs_save_res = 0;
12336 group->tls_get_addr_opt_bctrl = -1u;
12337 group->next = htab->group;
12338 htab->group = group;
12339 do
12340 {
12341 prev = htab->sec_info[tail->id].u.list;
12342 /* Set up this stub group. */
12343 htab->sec_info[tail->id].u.group = group;
12344 }
12345 while (tail != curr && (tail = prev) != NULL);
12346
12347 /* But wait, there's more! Input sections up to group_size
12348 bytes before the stub section can be handled by it too.
12349 Don't do this if we have a really large section after the
12350 stubs, as adding more stubs increases the chance that
12351 branches may not reach into the stub section. */
12352 if (!stubs_always_before_branch && !big_sec)
12353 {
12354 total = 0;
12355 while (prev != NULL
12356 && ((total += tail->output_offset - prev->output_offset)
12357 < (ppc64_elf_section_data (prev) != NULL
12358 && ppc64_elf_section_data (prev)->has_14bit_branch
12359 ? (group_size = stub_group_size >> 10) : group_size))
12360 && htab->sec_info[prev->id].toc_off == curr_toc)
12361 {
12362 tail = prev;
12363 prev = htab->sec_info[tail->id].u.list;
12364 htab->sec_info[tail->id].u.group = group;
12365 }
12366 }
12367 tail = prev;
12368 }
12369 }
12370 return TRUE;
12371 }
12372
12373 static const unsigned char glink_eh_frame_cie[] =
12374 {
12375 0, 0, 0, 16, /* length. */
12376 0, 0, 0, 0, /* id. */
12377 1, /* CIE version. */
12378 'z', 'R', 0, /* Augmentation string. */
12379 4, /* Code alignment. */
12380 0x78, /* Data alignment. */
12381 65, /* RA reg. */
12382 1, /* Augmentation size. */
12383 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12384 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12385 };
12386
12387 static size_t
12388 stub_eh_frame_size (struct map_stub *group, size_t align)
12389 {
12390 size_t this_size = 17;
12391 if (group->tls_get_addr_opt_bctrl != -1u)
12392 {
12393 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12394 if (to_bctrl < 64)
12395 this_size += 1;
12396 else if (to_bctrl < 256)
12397 this_size += 2;
12398 else if (to_bctrl < 65536)
12399 this_size += 3;
12400 else
12401 this_size += 5;
12402 this_size += 6;
12403 }
12404 this_size = (this_size + align - 1) & -align;
12405 return this_size;
12406 }
12407
12408 /* Stripping output sections is normally done before dynamic section
12409 symbols have been allocated. This function is called later, and
12410 handles cases like htab->brlt which is mapped to its own output
12411 section. */
12412
12413 static void
12414 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12415 {
12416 if (isec->size == 0
12417 && isec->output_section->size == 0
12418 && !(isec->output_section->flags & SEC_KEEP)
12419 && !bfd_section_removed_from_list (info->output_bfd,
12420 isec->output_section)
12421 && elf_section_data (isec->output_section)->dynindx == 0)
12422 {
12423 isec->output_section->flags |= SEC_EXCLUDE;
12424 bfd_section_list_remove (info->output_bfd, isec->output_section);
12425 info->output_bfd->section_count--;
12426 }
12427 }
12428
12429 /* Determine and set the size of the stub section for a final link.
12430
12431 The basic idea here is to examine all the relocations looking for
12432 PC-relative calls to a target that is unreachable with a "bl"
12433 instruction. */
12434
12435 bfd_boolean
12436 ppc64_elf_size_stubs (struct bfd_link_info *info)
12437 {
12438 bfd_size_type stub_group_size;
12439 bfd_boolean stubs_always_before_branch;
12440 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12441
12442 if (htab == NULL)
12443 return FALSE;
12444
12445 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12446 htab->params->plt_thread_safe = 1;
12447 if (!htab->opd_abi)
12448 htab->params->plt_thread_safe = 0;
12449 else if (htab->params->plt_thread_safe == -1)
12450 {
12451 static const char *const thread_starter[] =
12452 {
12453 "pthread_create",
12454 /* libstdc++ */
12455 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12456 /* librt */
12457 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12458 "mq_notify", "create_timer",
12459 /* libanl */
12460 "getaddrinfo_a",
12461 /* libgomp */
12462 "GOMP_parallel",
12463 "GOMP_parallel_start",
12464 "GOMP_parallel_loop_static",
12465 "GOMP_parallel_loop_static_start",
12466 "GOMP_parallel_loop_dynamic",
12467 "GOMP_parallel_loop_dynamic_start",
12468 "GOMP_parallel_loop_guided",
12469 "GOMP_parallel_loop_guided_start",
12470 "GOMP_parallel_loop_runtime",
12471 "GOMP_parallel_loop_runtime_start",
12472 "GOMP_parallel_sections",
12473 "GOMP_parallel_sections_start",
12474 /* libgo */
12475 "__go_go",
12476 };
12477 unsigned i;
12478
12479 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12480 {
12481 struct elf_link_hash_entry *h;
12482 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12483 FALSE, FALSE, TRUE);
12484 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12485 if (htab->params->plt_thread_safe)
12486 break;
12487 }
12488 }
12489 stubs_always_before_branch = htab->params->group_size < 0;
12490 if (htab->params->group_size < 0)
12491 stub_group_size = -htab->params->group_size;
12492 else
12493 stub_group_size = htab->params->group_size;
12494
12495 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12496 return FALSE;
12497
12498 #define STUB_SHRINK_ITER 20
12499 /* Loop until no stubs added. After iteration 20 of this loop we may
12500 exit on a stub section shrinking. This is to break out of a
12501 pathological case where adding stubs on one iteration decreases
12502 section gaps (perhaps due to alignment), which then requires
12503 fewer or smaller stubs on the next iteration. */
12504
12505 while (1)
12506 {
12507 bfd *input_bfd;
12508 unsigned int bfd_indx;
12509 struct map_stub *group;
12510
12511 htab->stub_iteration += 1;
12512
12513 for (input_bfd = info->input_bfds, bfd_indx = 0;
12514 input_bfd != NULL;
12515 input_bfd = input_bfd->link.next, bfd_indx++)
12516 {
12517 Elf_Internal_Shdr *symtab_hdr;
12518 asection *section;
12519 Elf_Internal_Sym *local_syms = NULL;
12520
12521 if (!is_ppc64_elf (input_bfd))
12522 continue;
12523
12524 /* We'll need the symbol table in a second. */
12525 symtab_hdr = &elf_symtab_hdr (input_bfd);
12526 if (symtab_hdr->sh_info == 0)
12527 continue;
12528
12529 /* Walk over each section attached to the input bfd. */
12530 for (section = input_bfd->sections;
12531 section != NULL;
12532 section = section->next)
12533 {
12534 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12535
12536 /* If there aren't any relocs, then there's nothing more
12537 to do. */
12538 if ((section->flags & SEC_RELOC) == 0
12539 || (section->flags & SEC_ALLOC) == 0
12540 || (section->flags & SEC_LOAD) == 0
12541 || (section->flags & SEC_CODE) == 0
12542 || section->reloc_count == 0)
12543 continue;
12544
12545 /* If this section is a link-once section that will be
12546 discarded, then don't create any stubs. */
12547 if (section->output_section == NULL
12548 || section->output_section->owner != info->output_bfd)
12549 continue;
12550
12551 /* Get the relocs. */
12552 internal_relocs
12553 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12554 info->keep_memory);
12555 if (internal_relocs == NULL)
12556 goto error_ret_free_local;
12557
12558 /* Now examine each relocation. */
12559 irela = internal_relocs;
12560 irelaend = irela + section->reloc_count;
12561 for (; irela < irelaend; irela++)
12562 {
12563 enum elf_ppc64_reloc_type r_type;
12564 unsigned int r_indx;
12565 enum ppc_stub_type stub_type;
12566 struct ppc_stub_hash_entry *stub_entry;
12567 asection *sym_sec, *code_sec;
12568 bfd_vma sym_value, code_value;
12569 bfd_vma destination;
12570 unsigned long local_off;
12571 bfd_boolean ok_dest;
12572 struct ppc_link_hash_entry *hash;
12573 struct ppc_link_hash_entry *fdh;
12574 struct elf_link_hash_entry *h;
12575 Elf_Internal_Sym *sym;
12576 char *stub_name;
12577 const asection *id_sec;
12578 struct _opd_sec_data *opd;
12579 struct plt_entry *plt_ent;
12580
12581 r_type = ELF64_R_TYPE (irela->r_info);
12582 r_indx = ELF64_R_SYM (irela->r_info);
12583
12584 if (r_type >= R_PPC64_max)
12585 {
12586 bfd_set_error (bfd_error_bad_value);
12587 goto error_ret_free_internal;
12588 }
12589
12590 /* Only look for stubs on branch instructions. */
12591 if (r_type != R_PPC64_REL24
12592 && r_type != R_PPC64_REL14
12593 && r_type != R_PPC64_REL14_BRTAKEN
12594 && r_type != R_PPC64_REL14_BRNTAKEN)
12595 continue;
12596
12597 /* Now determine the call target, its name, value,
12598 section. */
12599 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12600 r_indx, input_bfd))
12601 goto error_ret_free_internal;
12602 hash = (struct ppc_link_hash_entry *) h;
12603
12604 ok_dest = FALSE;
12605 fdh = NULL;
12606 sym_value = 0;
12607 if (hash == NULL)
12608 {
12609 sym_value = sym->st_value;
12610 if (sym_sec != NULL
12611 && sym_sec->output_section != NULL)
12612 ok_dest = TRUE;
12613 }
12614 else if (hash->elf.root.type == bfd_link_hash_defined
12615 || hash->elf.root.type == bfd_link_hash_defweak)
12616 {
12617 sym_value = hash->elf.root.u.def.value;
12618 if (sym_sec->output_section != NULL)
12619 ok_dest = TRUE;
12620 }
12621 else if (hash->elf.root.type == bfd_link_hash_undefweak
12622 || hash->elf.root.type == bfd_link_hash_undefined)
12623 {
12624 /* Recognise an old ABI func code entry sym, and
12625 use the func descriptor sym instead if it is
12626 defined. */
12627 if (hash->elf.root.root.string[0] == '.'
12628 && hash->oh != NULL)
12629 {
12630 fdh = ppc_follow_link (hash->oh);
12631 if (fdh->elf.root.type == bfd_link_hash_defined
12632 || fdh->elf.root.type == bfd_link_hash_defweak)
12633 {
12634 sym_sec = fdh->elf.root.u.def.section;
12635 sym_value = fdh->elf.root.u.def.value;
12636 if (sym_sec->output_section != NULL)
12637 ok_dest = TRUE;
12638 }
12639 else
12640 fdh = NULL;
12641 }
12642 }
12643 else
12644 {
12645 bfd_set_error (bfd_error_bad_value);
12646 goto error_ret_free_internal;
12647 }
12648
12649 destination = 0;
12650 local_off = 0;
12651 if (ok_dest)
12652 {
12653 sym_value += irela->r_addend;
12654 destination = (sym_value
12655 + sym_sec->output_offset
12656 + sym_sec->output_section->vma);
12657 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12658 ? hash->elf.other
12659 : sym->st_other);
12660 }
12661
12662 code_sec = sym_sec;
12663 code_value = sym_value;
12664 opd = get_opd_info (sym_sec);
12665 if (opd != NULL)
12666 {
12667 bfd_vma dest;
12668
12669 if (hash == NULL && opd->adjust != NULL)
12670 {
12671 long adjust = opd->adjust[OPD_NDX (sym_value)];
12672 if (adjust == -1)
12673 continue;
12674 code_value += adjust;
12675 sym_value += adjust;
12676 }
12677 dest = opd_entry_value (sym_sec, sym_value,
12678 &code_sec, &code_value, FALSE);
12679 if (dest != (bfd_vma) -1)
12680 {
12681 destination = dest;
12682 if (fdh != NULL)
12683 {
12684 /* Fixup old ABI sym to point at code
12685 entry. */
12686 hash->elf.root.type = bfd_link_hash_defweak;
12687 hash->elf.root.u.def.section = code_sec;
12688 hash->elf.root.u.def.value = code_value;
12689 }
12690 }
12691 }
12692
12693 /* Determine what (if any) linker stub is needed. */
12694 plt_ent = NULL;
12695 stub_type = ppc_type_of_stub (section, irela, &hash,
12696 &plt_ent, destination,
12697 local_off);
12698
12699 if (stub_type != ppc_stub_plt_call)
12700 {
12701 /* Check whether we need a TOC adjusting stub.
12702 Since the linker pastes together pieces from
12703 different object files when creating the
12704 _init and _fini functions, it may be that a
12705 call to what looks like a local sym is in
12706 fact a call needing a TOC adjustment. */
12707 if (code_sec != NULL
12708 && code_sec->output_section != NULL
12709 && (htab->sec_info[code_sec->id].toc_off
12710 != htab->sec_info[section->id].toc_off)
12711 && (code_sec->has_toc_reloc
12712 || code_sec->makes_toc_func_call))
12713 stub_type = ppc_stub_long_branch_r2off;
12714 }
12715
12716 if (stub_type == ppc_stub_none)
12717 continue;
12718
12719 /* __tls_get_addr calls might be eliminated. */
12720 if (stub_type != ppc_stub_plt_call
12721 && hash != NULL
12722 && (hash == htab->tls_get_addr
12723 || hash == htab->tls_get_addr_fd)
12724 && section->has_tls_reloc
12725 && irela != internal_relocs)
12726 {
12727 /* Get tls info. */
12728 unsigned char *tls_mask;
12729
12730 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12731 irela - 1, input_bfd))
12732 goto error_ret_free_internal;
12733 if (*tls_mask != 0)
12734 continue;
12735 }
12736
12737 if (stub_type == ppc_stub_plt_call)
12738 {
12739 if (!htab->opd_abi
12740 && htab->params->plt_localentry0 != 0
12741 && is_elfv2_localentry0 (&hash->elf))
12742 htab->has_plt_localentry0 = 1;
12743 else if (irela + 1 < irelaend
12744 && irela[1].r_offset == irela->r_offset + 4
12745 && (ELF64_R_TYPE (irela[1].r_info)
12746 == R_PPC64_TOCSAVE))
12747 {
12748 if (!tocsave_find (htab, INSERT,
12749 &local_syms, irela + 1, input_bfd))
12750 goto error_ret_free_internal;
12751 }
12752 else
12753 stub_type = ppc_stub_plt_call_r2save;
12754 }
12755
12756 /* Support for grouping stub sections. */
12757 id_sec = htab->sec_info[section->id].u.group->link_sec;
12758
12759 /* Get the name of this stub. */
12760 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12761 if (!stub_name)
12762 goto error_ret_free_internal;
12763
12764 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12765 stub_name, FALSE, FALSE);
12766 if (stub_entry != NULL)
12767 {
12768 /* The proper stub has already been created. */
12769 free (stub_name);
12770 if (stub_type == ppc_stub_plt_call_r2save)
12771 stub_entry->stub_type = stub_type;
12772 continue;
12773 }
12774
12775 stub_entry = ppc_add_stub (stub_name, section, info);
12776 if (stub_entry == NULL)
12777 {
12778 free (stub_name);
12779 error_ret_free_internal:
12780 if (elf_section_data (section)->relocs == NULL)
12781 free (internal_relocs);
12782 error_ret_free_local:
12783 if (local_syms != NULL
12784 && (symtab_hdr->contents
12785 != (unsigned char *) local_syms))
12786 free (local_syms);
12787 return FALSE;
12788 }
12789
12790 stub_entry->stub_type = stub_type;
12791 if (stub_type != ppc_stub_plt_call
12792 && stub_type != ppc_stub_plt_call_r2save)
12793 {
12794 stub_entry->target_value = code_value;
12795 stub_entry->target_section = code_sec;
12796 }
12797 else
12798 {
12799 stub_entry->target_value = sym_value;
12800 stub_entry->target_section = sym_sec;
12801 }
12802 stub_entry->h = hash;
12803 stub_entry->plt_ent = plt_ent;
12804 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12805
12806 if (stub_entry->h != NULL)
12807 htab->stub_globals += 1;
12808 }
12809
12810 /* We're done with the internal relocs, free them. */
12811 if (elf_section_data (section)->relocs != internal_relocs)
12812 free (internal_relocs);
12813 }
12814
12815 if (local_syms != NULL
12816 && symtab_hdr->contents != (unsigned char *) local_syms)
12817 {
12818 if (!info->keep_memory)
12819 free (local_syms);
12820 else
12821 symtab_hdr->contents = (unsigned char *) local_syms;
12822 }
12823 }
12824
12825 /* We may have added some stubs. Find out the new size of the
12826 stub sections. */
12827 for (group = htab->group; group != NULL; group = group->next)
12828 if (group->stub_sec != NULL)
12829 {
12830 asection *stub_sec = group->stub_sec;
12831
12832 if (htab->stub_iteration <= STUB_SHRINK_ITER
12833 || stub_sec->rawsize < stub_sec->size)
12834 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12835 stub_sec->rawsize = stub_sec->size;
12836 stub_sec->size = 0;
12837 stub_sec->reloc_count = 0;
12838 stub_sec->flags &= ~SEC_RELOC;
12839 }
12840
12841 htab->brlt->size = 0;
12842 htab->brlt->reloc_count = 0;
12843 htab->brlt->flags &= ~SEC_RELOC;
12844 if (htab->relbrlt != NULL)
12845 htab->relbrlt->size = 0;
12846
12847 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12848
12849 for (group = htab->group; group != NULL; group = group->next)
12850 if (group->needs_save_res)
12851 group->stub_sec->size += htab->sfpr->size;
12852
12853 if (info->emitrelocations
12854 && htab->glink != NULL && htab->glink->size != 0)
12855 {
12856 htab->glink->reloc_count = 1;
12857 htab->glink->flags |= SEC_RELOC;
12858 }
12859
12860 if (htab->glink_eh_frame != NULL
12861 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12862 && htab->glink_eh_frame->output_section->size != 0)
12863 {
12864 size_t size = 0, align = 4;
12865
12866 for (group = htab->group; group != NULL; group = group->next)
12867 if (group->stub_sec != NULL)
12868 size += stub_eh_frame_size (group, align);
12869 if (htab->glink != NULL && htab->glink->size != 0)
12870 size += (24 + align - 1) & -align;
12871 if (size != 0)
12872 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12873 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12874 size = (size + align - 1) & -align;
12875 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12876 htab->glink_eh_frame->size = size;
12877 }
12878
12879 if (htab->params->plt_stub_align != 0)
12880 for (group = htab->group; group != NULL; group = group->next)
12881 if (group->stub_sec != NULL)
12882 group->stub_sec->size = ((group->stub_sec->size
12883 + (1 << htab->params->plt_stub_align) - 1)
12884 & -(1 << htab->params->plt_stub_align));
12885
12886 for (group = htab->group; group != NULL; group = group->next)
12887 if (group->stub_sec != NULL
12888 && group->stub_sec->rawsize != group->stub_sec->size
12889 && (htab->stub_iteration <= STUB_SHRINK_ITER
12890 || group->stub_sec->rawsize < group->stub_sec->size))
12891 break;
12892
12893 if (group == NULL
12894 && (htab->glink_eh_frame == NULL
12895 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12896 break;
12897
12898 /* Ask the linker to do its stuff. */
12899 (*htab->params->layout_sections_again) ();
12900 }
12901
12902 if (htab->glink_eh_frame != NULL
12903 && htab->glink_eh_frame->size != 0)
12904 {
12905 bfd_vma val;
12906 bfd_byte *p, *last_fde;
12907 size_t last_fde_len, size, align, pad;
12908 struct map_stub *group;
12909
12910 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12911 if (p == NULL)
12912 return FALSE;
12913 htab->glink_eh_frame->contents = p;
12914 last_fde = p;
12915 align = 4;
12916
12917 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12918 /* CIE length (rewrite in case little-endian). */
12919 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12920 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12921 p += last_fde_len + 4;
12922
12923 for (group = htab->group; group != NULL; group = group->next)
12924 if (group->stub_sec != NULL)
12925 {
12926 last_fde = p;
12927 last_fde_len = stub_eh_frame_size (group, align) - 4;
12928 /* FDE length. */
12929 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12930 p += 4;
12931 /* CIE pointer. */
12932 val = p - htab->glink_eh_frame->contents;
12933 bfd_put_32 (htab->elf.dynobj, val, p);
12934 p += 4;
12935 /* Offset to stub section, written later. */
12936 p += 4;
12937 /* stub section size. */
12938 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12939 p += 4;
12940 /* Augmentation. */
12941 p += 1;
12942 if (group->tls_get_addr_opt_bctrl != -1u)
12943 {
12944 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12945
12946 /* This FDE needs more than just the default.
12947 Describe __tls_get_addr_opt stub LR. */
12948 if (to_bctrl < 64)
12949 *p++ = DW_CFA_advance_loc + to_bctrl;
12950 else if (to_bctrl < 256)
12951 {
12952 *p++ = DW_CFA_advance_loc1;
12953 *p++ = to_bctrl;
12954 }
12955 else if (to_bctrl < 65536)
12956 {
12957 *p++ = DW_CFA_advance_loc2;
12958 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12959 p += 2;
12960 }
12961 else
12962 {
12963 *p++ = DW_CFA_advance_loc4;
12964 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12965 p += 4;
12966 }
12967 *p++ = DW_CFA_offset_extended_sf;
12968 *p++ = 65;
12969 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12970 *p++ = DW_CFA_advance_loc + 4;
12971 *p++ = DW_CFA_restore_extended;
12972 *p++ = 65;
12973 }
12974 /* Pad. */
12975 p = last_fde + last_fde_len + 4;
12976 }
12977 if (htab->glink != NULL && htab->glink->size != 0)
12978 {
12979 last_fde = p;
12980 last_fde_len = ((24 + align - 1) & -align) - 4;
12981 /* FDE length. */
12982 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12983 p += 4;
12984 /* CIE pointer. */
12985 val = p - htab->glink_eh_frame->contents;
12986 bfd_put_32 (htab->elf.dynobj, val, p);
12987 p += 4;
12988 /* Offset to .glink, written later. */
12989 p += 4;
12990 /* .glink size. */
12991 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12992 p += 4;
12993 /* Augmentation. */
12994 p += 1;
12995
12996 *p++ = DW_CFA_advance_loc + 1;
12997 *p++ = DW_CFA_register;
12998 *p++ = 65;
12999 *p++ = htab->opd_abi ? 12 : 0;
13000 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
13001 *p++ = DW_CFA_restore_extended;
13002 *p++ = 65;
13003 p += ((24 + align - 1) & -align) - 24;
13004 }
13005 /* Subsume any padding into the last FDE if user .eh_frame
13006 sections are aligned more than glink_eh_frame. Otherwise any
13007 zero padding will be seen as a terminator. */
13008 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
13009 size = p - htab->glink_eh_frame->contents;
13010 pad = ((size + align - 1) & -align) - size;
13011 htab->glink_eh_frame->size = size + pad;
13012 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
13013 }
13014
13015 maybe_strip_output (info, htab->brlt);
13016 if (htab->glink_eh_frame != NULL)
13017 maybe_strip_output (info, htab->glink_eh_frame);
13018
13019 return TRUE;
13020 }
13021
13022 /* Called after we have determined section placement. If sections
13023 move, we'll be called again. Provide a value for TOCstart. */
13024
13025 bfd_vma
13026 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
13027 {
13028 asection *s;
13029 bfd_vma TOCstart, adjust;
13030
13031 if (info != NULL)
13032 {
13033 struct elf_link_hash_entry *h;
13034 struct elf_link_hash_table *htab = elf_hash_table (info);
13035
13036 if (is_elf_hash_table (htab)
13037 && htab->hgot != NULL)
13038 h = htab->hgot;
13039 else
13040 {
13041 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
13042 if (is_elf_hash_table (htab))
13043 htab->hgot = h;
13044 }
13045 if (h != NULL
13046 && h->root.type == bfd_link_hash_defined
13047 && !h->root.linker_def
13048 && (!is_elf_hash_table (htab)
13049 || h->def_regular))
13050 {
13051 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
13052 + h->root.u.def.section->output_offset
13053 + h->root.u.def.section->output_section->vma);
13054 _bfd_set_gp_value (obfd, TOCstart);
13055 return TOCstart;
13056 }
13057 }
13058
13059 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
13060 order. The TOC starts where the first of these sections starts. */
13061 s = bfd_get_section_by_name (obfd, ".got");
13062 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13063 s = bfd_get_section_by_name (obfd, ".toc");
13064 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13065 s = bfd_get_section_by_name (obfd, ".tocbss");
13066 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13067 s = bfd_get_section_by_name (obfd, ".plt");
13068 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13069 {
13070 /* This may happen for
13071 o references to TOC base (SYM@toc / TOC[tc0]) without a
13072 .toc directive
13073 o bad linker script
13074 o --gc-sections and empty TOC sections
13075
13076 FIXME: Warn user? */
13077
13078 /* Look for a likely section. We probably won't even be
13079 using TOCstart. */
13080 for (s = obfd->sections; s != NULL; s = s->next)
13081 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13082 | SEC_EXCLUDE))
13083 == (SEC_ALLOC | SEC_SMALL_DATA))
13084 break;
13085 if (s == NULL)
13086 for (s = obfd->sections; s != NULL; s = s->next)
13087 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13088 == (SEC_ALLOC | SEC_SMALL_DATA))
13089 break;
13090 if (s == NULL)
13091 for (s = obfd->sections; s != NULL; s = s->next)
13092 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13093 == SEC_ALLOC)
13094 break;
13095 if (s == NULL)
13096 for (s = obfd->sections; s != NULL; s = s->next)
13097 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13098 break;
13099 }
13100
13101 TOCstart = 0;
13102 if (s != NULL)
13103 TOCstart = s->output_section->vma + s->output_offset;
13104
13105 /* Force alignment. */
13106 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13107 TOCstart -= adjust;
13108 _bfd_set_gp_value (obfd, TOCstart);
13109
13110 if (info != NULL && s != NULL)
13111 {
13112 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13113
13114 if (htab != NULL)
13115 {
13116 if (htab->elf.hgot != NULL)
13117 {
13118 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13119 htab->elf.hgot->root.u.def.section = s;
13120 }
13121 }
13122 else
13123 {
13124 struct bfd_link_hash_entry *bh = NULL;
13125 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13126 s, TOC_BASE_OFF - adjust,
13127 NULL, FALSE, FALSE, &bh);
13128 }
13129 }
13130 return TOCstart;
13131 }
13132
13133 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13134 write out any global entry stubs. */
13135
13136 static bfd_boolean
13137 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13138 {
13139 struct bfd_link_info *info;
13140 struct ppc_link_hash_table *htab;
13141 struct plt_entry *pent;
13142 asection *s;
13143
13144 if (h->root.type == bfd_link_hash_indirect)
13145 return TRUE;
13146
13147 if (!h->pointer_equality_needed)
13148 return TRUE;
13149
13150 if (h->def_regular)
13151 return TRUE;
13152
13153 info = inf;
13154 htab = ppc_hash_table (info);
13155 if (htab == NULL)
13156 return FALSE;
13157
13158 s = htab->glink;
13159 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13160 if (pent->plt.offset != (bfd_vma) -1
13161 && pent->addend == 0)
13162 {
13163 bfd_byte *p;
13164 asection *plt;
13165 bfd_vma off;
13166
13167 p = s->contents + h->root.u.def.value;
13168 plt = htab->elf.splt;
13169 if (!htab->elf.dynamic_sections_created
13170 || h->dynindx == -1)
13171 plt = htab->elf.iplt;
13172 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13173 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13174
13175 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13176 {
13177 info->callbacks->einfo
13178 (_("%P: linkage table error against `%T'\n"),
13179 h->root.root.string);
13180 bfd_set_error (bfd_error_bad_value);
13181 htab->stub_error = TRUE;
13182 }
13183
13184 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13185 if (htab->params->emit_stub_syms)
13186 {
13187 size_t len = strlen (h->root.root.string);
13188 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13189
13190 if (name == NULL)
13191 return FALSE;
13192
13193 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13194 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13195 if (h == NULL)
13196 return FALSE;
13197 if (h->root.type == bfd_link_hash_new)
13198 {
13199 h->root.type = bfd_link_hash_defined;
13200 h->root.u.def.section = s;
13201 h->root.u.def.value = p - s->contents;
13202 h->ref_regular = 1;
13203 h->def_regular = 1;
13204 h->ref_regular_nonweak = 1;
13205 h->forced_local = 1;
13206 h->non_elf = 0;
13207 h->root.linker_def = 1;
13208 }
13209 }
13210
13211 if (PPC_HA (off) != 0)
13212 {
13213 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13214 p += 4;
13215 }
13216 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13217 p += 4;
13218 bfd_put_32 (s->owner, MTCTR_R12, p);
13219 p += 4;
13220 bfd_put_32 (s->owner, BCTR, p);
13221 break;
13222 }
13223 return TRUE;
13224 }
13225
13226 /* Build all the stubs associated with the current output file.
13227 The stubs are kept in a hash table attached to the main linker
13228 hash table. This function is called via gldelf64ppc_finish. */
13229
13230 bfd_boolean
13231 ppc64_elf_build_stubs (struct bfd_link_info *info,
13232 char **stats)
13233 {
13234 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13235 struct map_stub *group;
13236 asection *stub_sec;
13237 bfd_byte *p;
13238 int stub_sec_count = 0;
13239
13240 if (htab == NULL)
13241 return FALSE;
13242
13243 /* Allocate memory to hold the linker stubs. */
13244 for (group = htab->group; group != NULL; group = group->next)
13245 if ((stub_sec = group->stub_sec) != NULL
13246 && stub_sec->size != 0)
13247 {
13248 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13249 if (stub_sec->contents == NULL)
13250 return FALSE;
13251 stub_sec->size = 0;
13252 }
13253
13254 if (htab->glink != NULL && htab->glink->size != 0)
13255 {
13256 unsigned int indx;
13257 bfd_vma plt0;
13258
13259 /* Build the .glink plt call stub. */
13260 if (htab->params->emit_stub_syms)
13261 {
13262 struct elf_link_hash_entry *h;
13263 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13264 TRUE, FALSE, FALSE);
13265 if (h == NULL)
13266 return FALSE;
13267 if (h->root.type == bfd_link_hash_new)
13268 {
13269 h->root.type = bfd_link_hash_defined;
13270 h->root.u.def.section = htab->glink;
13271 h->root.u.def.value = 8;
13272 h->ref_regular = 1;
13273 h->def_regular = 1;
13274 h->ref_regular_nonweak = 1;
13275 h->forced_local = 1;
13276 h->non_elf = 0;
13277 h->root.linker_def = 1;
13278 }
13279 }
13280 plt0 = (htab->elf.splt->output_section->vma
13281 + htab->elf.splt->output_offset
13282 - 16);
13283 if (info->emitrelocations)
13284 {
13285 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13286 if (r == NULL)
13287 return FALSE;
13288 r->r_offset = (htab->glink->output_offset
13289 + htab->glink->output_section->vma);
13290 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13291 r->r_addend = plt0;
13292 }
13293 p = htab->glink->contents;
13294 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13295 bfd_put_64 (htab->glink->owner, plt0, p);
13296 p += 8;
13297 if (htab->opd_abi)
13298 {
13299 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13300 p += 4;
13301 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13302 p += 4;
13303 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13304 p += 4;
13305 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13306 p += 4;
13307 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13308 p += 4;
13309 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13310 p += 4;
13311 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13312 p += 4;
13313 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13314 p += 4;
13315 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13316 p += 4;
13317 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13318 p += 4;
13319 }
13320 else
13321 {
13322 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13323 p += 4;
13324 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13325 p += 4;
13326 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13327 p += 4;
13328 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13329 p += 4;
13330 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13331 p += 4;
13332 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13333 p += 4;
13334 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13335 p += 4;
13336 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13337 p += 4;
13338 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13339 p += 4;
13340 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13341 p += 4;
13342 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13343 p += 4;
13344 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13345 p += 4;
13346 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13347 p += 4;
13348 }
13349 bfd_put_32 (htab->glink->owner, BCTR, p);
13350 p += 4;
13351 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13352 {
13353 bfd_put_32 (htab->glink->owner, NOP, p);
13354 p += 4;
13355 }
13356
13357 /* Build the .glink lazy link call stubs. */
13358 indx = 0;
13359 while (p < htab->glink->contents + htab->glink->rawsize)
13360 {
13361 if (htab->opd_abi)
13362 {
13363 if (indx < 0x8000)
13364 {
13365 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13366 p += 4;
13367 }
13368 else
13369 {
13370 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13371 p += 4;
13372 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13373 p);
13374 p += 4;
13375 }
13376 }
13377 bfd_put_32 (htab->glink->owner,
13378 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13379 indx++;
13380 p += 4;
13381 }
13382
13383 /* Build .glink global entry stubs. */
13384 if (htab->glink->size > htab->glink->rawsize)
13385 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13386 }
13387
13388 if (htab->brlt != NULL && htab->brlt->size != 0)
13389 {
13390 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13391 htab->brlt->size);
13392 if (htab->brlt->contents == NULL)
13393 return FALSE;
13394 }
13395 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13396 {
13397 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13398 htab->relbrlt->size);
13399 if (htab->relbrlt->contents == NULL)
13400 return FALSE;
13401 }
13402
13403 /* Build the stubs as directed by the stub hash table. */
13404 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13405
13406 for (group = htab->group; group != NULL; group = group->next)
13407 if (group->needs_save_res)
13408 {
13409 stub_sec = group->stub_sec;
13410 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13411 htab->sfpr->size);
13412 if (htab->params->emit_stub_syms)
13413 {
13414 unsigned int i;
13415
13416 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13417 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13418 return FALSE;
13419 }
13420 stub_sec->size += htab->sfpr->size;
13421 }
13422
13423 if (htab->relbrlt != NULL)
13424 htab->relbrlt->reloc_count = 0;
13425
13426 if (htab->params->plt_stub_align != 0)
13427 for (group = htab->group; group != NULL; group = group->next)
13428 if ((stub_sec = group->stub_sec) != NULL)
13429 stub_sec->size = ((stub_sec->size
13430 + (1 << htab->params->plt_stub_align) - 1)
13431 & -(1 << htab->params->plt_stub_align));
13432
13433 for (group = htab->group; group != NULL; group = group->next)
13434 if ((stub_sec = group->stub_sec) != NULL)
13435 {
13436 stub_sec_count += 1;
13437 if (stub_sec->rawsize != stub_sec->size
13438 && (htab->stub_iteration <= STUB_SHRINK_ITER
13439 || stub_sec->rawsize < stub_sec->size))
13440 break;
13441 }
13442
13443 if (group != NULL)
13444 {
13445 htab->stub_error = TRUE;
13446 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13447 }
13448
13449 if (htab->stub_error)
13450 return FALSE;
13451
13452 if (stats != NULL)
13453 {
13454 *stats = bfd_malloc (500);
13455 if (*stats == NULL)
13456 return FALSE;
13457
13458 sprintf (*stats, _("linker stubs in %u group%s\n"
13459 " branch %lu\n"
13460 " toc adjust %lu\n"
13461 " long branch %lu\n"
13462 " long toc adj %lu\n"
13463 " plt call %lu\n"
13464 " plt call toc %lu\n"
13465 " global entry %lu"),
13466 stub_sec_count,
13467 stub_sec_count == 1 ? "" : "s",
13468 htab->stub_count[ppc_stub_long_branch - 1],
13469 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13470 htab->stub_count[ppc_stub_plt_branch - 1],
13471 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13472 htab->stub_count[ppc_stub_plt_call - 1],
13473 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13474 htab->stub_count[ppc_stub_global_entry - 1]);
13475 }
13476 return TRUE;
13477 }
13478
13479 /* What to do when ld finds relocations against symbols defined in
13480 discarded sections. */
13481
13482 static unsigned int
13483 ppc64_elf_action_discarded (asection *sec)
13484 {
13485 if (strcmp (".opd", sec->name) == 0)
13486 return 0;
13487
13488 if (strcmp (".toc", sec->name) == 0)
13489 return 0;
13490
13491 if (strcmp (".toc1", sec->name) == 0)
13492 return 0;
13493
13494 return _bfd_elf_default_action_discarded (sec);
13495 }
13496
13497 /* The RELOCATE_SECTION function is called by the ELF backend linker
13498 to handle the relocations for a section.
13499
13500 The relocs are always passed as Rela structures; if the section
13501 actually uses Rel structures, the r_addend field will always be
13502 zero.
13503
13504 This function is responsible for adjust the section contents as
13505 necessary, and (if using Rela relocs and generating a
13506 relocatable output file) adjusting the reloc addend as
13507 necessary.
13508
13509 This function does not have to worry about setting the reloc
13510 address or the reloc symbol index.
13511
13512 LOCAL_SYMS is a pointer to the swapped in local symbols.
13513
13514 LOCAL_SECTIONS is an array giving the section in the input file
13515 corresponding to the st_shndx field of each local symbol.
13516
13517 The global hash table entry for the global symbols can be found
13518 via elf_sym_hashes (input_bfd).
13519
13520 When generating relocatable output, this function must handle
13521 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13522 going to be the section symbol corresponding to the output
13523 section, which means that the addend must be adjusted
13524 accordingly. */
13525
13526 static bfd_boolean
13527 ppc64_elf_relocate_section (bfd *output_bfd,
13528 struct bfd_link_info *info,
13529 bfd *input_bfd,
13530 asection *input_section,
13531 bfd_byte *contents,
13532 Elf_Internal_Rela *relocs,
13533 Elf_Internal_Sym *local_syms,
13534 asection **local_sections)
13535 {
13536 struct ppc_link_hash_table *htab;
13537 Elf_Internal_Shdr *symtab_hdr;
13538 struct elf_link_hash_entry **sym_hashes;
13539 Elf_Internal_Rela *rel;
13540 Elf_Internal_Rela *wrel;
13541 Elf_Internal_Rela *relend;
13542 Elf_Internal_Rela outrel;
13543 bfd_byte *loc;
13544 struct got_entry **local_got_ents;
13545 bfd_vma TOCstart;
13546 bfd_boolean ret = TRUE;
13547 bfd_boolean is_opd;
13548 /* Assume 'at' branch hints. */
13549 bfd_boolean is_isa_v2 = TRUE;
13550 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13551
13552 /* Initialize howto table if needed. */
13553 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13554 ppc_howto_init ();
13555
13556 htab = ppc_hash_table (info);
13557 if (htab == NULL)
13558 return FALSE;
13559
13560 /* Don't relocate stub sections. */
13561 if (input_section->owner == htab->params->stub_bfd)
13562 return TRUE;
13563
13564 BFD_ASSERT (is_ppc64_elf (input_bfd));
13565
13566 local_got_ents = elf_local_got_ents (input_bfd);
13567 TOCstart = elf_gp (output_bfd);
13568 symtab_hdr = &elf_symtab_hdr (input_bfd);
13569 sym_hashes = elf_sym_hashes (input_bfd);
13570 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13571
13572 rel = wrel = relocs;
13573 relend = relocs + input_section->reloc_count;
13574 for (; rel < relend; wrel++, rel++)
13575 {
13576 enum elf_ppc64_reloc_type r_type;
13577 bfd_vma addend;
13578 bfd_reloc_status_type r;
13579 Elf_Internal_Sym *sym;
13580 asection *sec;
13581 struct elf_link_hash_entry *h_elf;
13582 struct ppc_link_hash_entry *h;
13583 struct ppc_link_hash_entry *fdh;
13584 const char *sym_name;
13585 unsigned long r_symndx, toc_symndx;
13586 bfd_vma toc_addend;
13587 unsigned char tls_mask, tls_gd, tls_type;
13588 unsigned char sym_type;
13589 bfd_vma relocation;
13590 bfd_boolean unresolved_reloc;
13591 bfd_boolean warned;
13592 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13593 unsigned int insn;
13594 unsigned int mask;
13595 struct ppc_stub_hash_entry *stub_entry;
13596 bfd_vma max_br_offset;
13597 bfd_vma from;
13598 Elf_Internal_Rela orig_rel;
13599 reloc_howto_type *howto;
13600 struct reloc_howto_struct alt_howto;
13601
13602 again:
13603 orig_rel = *rel;
13604
13605 r_type = ELF64_R_TYPE (rel->r_info);
13606 r_symndx = ELF64_R_SYM (rel->r_info);
13607
13608 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13609 symbol of the previous ADDR64 reloc. The symbol gives us the
13610 proper TOC base to use. */
13611 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13612 && wrel != relocs
13613 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13614 && is_opd)
13615 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13616
13617 sym = NULL;
13618 sec = NULL;
13619 h_elf = NULL;
13620 sym_name = NULL;
13621 unresolved_reloc = FALSE;
13622 warned = FALSE;
13623
13624 if (r_symndx < symtab_hdr->sh_info)
13625 {
13626 /* It's a local symbol. */
13627 struct _opd_sec_data *opd;
13628
13629 sym = local_syms + r_symndx;
13630 sec = local_sections[r_symndx];
13631 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13632 sym_type = ELF64_ST_TYPE (sym->st_info);
13633 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13634 opd = get_opd_info (sec);
13635 if (opd != NULL && opd->adjust != NULL)
13636 {
13637 long adjust = opd->adjust[OPD_NDX (sym->st_value
13638 + rel->r_addend)];
13639 if (adjust == -1)
13640 relocation = 0;
13641 else
13642 {
13643 /* If this is a relocation against the opd section sym
13644 and we have edited .opd, adjust the reloc addend so
13645 that ld -r and ld --emit-relocs output is correct.
13646 If it is a reloc against some other .opd symbol,
13647 then the symbol value will be adjusted later. */
13648 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13649 rel->r_addend += adjust;
13650 else
13651 relocation += adjust;
13652 }
13653 }
13654 }
13655 else
13656 {
13657 bfd_boolean ignored;
13658
13659 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13660 r_symndx, symtab_hdr, sym_hashes,
13661 h_elf, sec, relocation,
13662 unresolved_reloc, warned, ignored);
13663 sym_name = h_elf->root.root.string;
13664 sym_type = h_elf->type;
13665 if (sec != NULL
13666 && sec->owner == output_bfd
13667 && strcmp (sec->name, ".opd") == 0)
13668 {
13669 /* This is a symbol defined in a linker script. All
13670 such are defined in output sections, even those
13671 defined by simple assignment from a symbol defined in
13672 an input section. Transfer the symbol to an
13673 appropriate input .opd section, so that a branch to
13674 this symbol will be mapped to the location specified
13675 by the opd entry. */
13676 struct bfd_link_order *lo;
13677 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13678 if (lo->type == bfd_indirect_link_order)
13679 {
13680 asection *isec = lo->u.indirect.section;
13681 if (h_elf->root.u.def.value >= isec->output_offset
13682 && h_elf->root.u.def.value < (isec->output_offset
13683 + isec->size))
13684 {
13685 h_elf->root.u.def.value -= isec->output_offset;
13686 h_elf->root.u.def.section = isec;
13687 sec = isec;
13688 break;
13689 }
13690 }
13691 }
13692 }
13693 h = (struct ppc_link_hash_entry *) h_elf;
13694
13695 if (sec != NULL && discarded_section (sec))
13696 {
13697 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13698 input_bfd, input_section,
13699 contents + rel->r_offset);
13700 wrel->r_offset = rel->r_offset;
13701 wrel->r_info = 0;
13702 wrel->r_addend = 0;
13703
13704 /* For ld -r, remove relocations in debug sections against
13705 symbols defined in discarded sections. Not done for
13706 non-debug to preserve relocs in .eh_frame which the
13707 eh_frame editing code expects to be present. */
13708 if (bfd_link_relocatable (info)
13709 && (input_section->flags & SEC_DEBUGGING))
13710 wrel--;
13711
13712 continue;
13713 }
13714
13715 if (bfd_link_relocatable (info))
13716 goto copy_reloc;
13717
13718 if (h != NULL && &h->elf == htab->elf.hgot)
13719 {
13720 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13721 sec = bfd_abs_section_ptr;
13722 unresolved_reloc = FALSE;
13723 }
13724
13725 /* TLS optimizations. Replace instruction sequences and relocs
13726 based on information we collected in tls_optimize. We edit
13727 RELOCS so that --emit-relocs will output something sensible
13728 for the final instruction stream. */
13729 tls_mask = 0;
13730 tls_gd = 0;
13731 toc_symndx = 0;
13732 if (h != NULL)
13733 tls_mask = h->tls_mask;
13734 else if (local_got_ents != NULL)
13735 {
13736 struct plt_entry **local_plt = (struct plt_entry **)
13737 (local_got_ents + symtab_hdr->sh_info);
13738 unsigned char *lgot_masks = (unsigned char *)
13739 (local_plt + symtab_hdr->sh_info);
13740 tls_mask = lgot_masks[r_symndx];
13741 }
13742 if (tls_mask == 0
13743 && (r_type == R_PPC64_TLS
13744 || r_type == R_PPC64_TLSGD
13745 || r_type == R_PPC64_TLSLD))
13746 {
13747 /* Check for toc tls entries. */
13748 unsigned char *toc_tls;
13749
13750 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13751 &local_syms, rel, input_bfd))
13752 return FALSE;
13753
13754 if (toc_tls)
13755 tls_mask = *toc_tls;
13756 }
13757
13758 /* Check that tls relocs are used with tls syms, and non-tls
13759 relocs are used with non-tls syms. */
13760 if (r_symndx != STN_UNDEF
13761 && r_type != R_PPC64_NONE
13762 && (h == NULL
13763 || h->elf.root.type == bfd_link_hash_defined
13764 || h->elf.root.type == bfd_link_hash_defweak)
13765 && (IS_PPC64_TLS_RELOC (r_type)
13766 != (sym_type == STT_TLS
13767 || (sym_type == STT_SECTION
13768 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13769 {
13770 if (tls_mask != 0
13771 && (r_type == R_PPC64_TLS
13772 || r_type == R_PPC64_TLSGD
13773 || r_type == R_PPC64_TLSLD))
13774 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13775 ;
13776 else
13777 info->callbacks->einfo
13778 (!IS_PPC64_TLS_RELOC (r_type)
13779 /* xgettext:c-format */
13780 ? _("%H: %s used with TLS symbol `%T'\n")
13781 /* xgettext:c-format */
13782 : _("%H: %s used with non-TLS symbol `%T'\n"),
13783 input_bfd, input_section, rel->r_offset,
13784 ppc64_elf_howto_table[r_type]->name,
13785 sym_name);
13786 }
13787
13788 /* Ensure reloc mapping code below stays sane. */
13789 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13790 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13791 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13792 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13793 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13794 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13795 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13796 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13797 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13798 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13799 abort ();
13800
13801 switch (r_type)
13802 {
13803 default:
13804 break;
13805
13806 case R_PPC64_LO_DS_OPT:
13807 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13808 if ((insn & (0x3f << 26)) != 58u << 26)
13809 abort ();
13810 insn += (14u << 26) - (58u << 26);
13811 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13812 r_type = R_PPC64_TOC16_LO;
13813 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13814 break;
13815
13816 case R_PPC64_TOC16:
13817 case R_PPC64_TOC16_LO:
13818 case R_PPC64_TOC16_DS:
13819 case R_PPC64_TOC16_LO_DS:
13820 {
13821 /* Check for toc tls entries. */
13822 unsigned char *toc_tls;
13823 int retval;
13824
13825 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13826 &local_syms, rel, input_bfd);
13827 if (retval == 0)
13828 return FALSE;
13829
13830 if (toc_tls)
13831 {
13832 tls_mask = *toc_tls;
13833 if (r_type == R_PPC64_TOC16_DS
13834 || r_type == R_PPC64_TOC16_LO_DS)
13835 {
13836 if (tls_mask != 0
13837 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13838 goto toctprel;
13839 }
13840 else
13841 {
13842 /* If we found a GD reloc pair, then we might be
13843 doing a GD->IE transition. */
13844 if (retval == 2)
13845 {
13846 tls_gd = TLS_TPRELGD;
13847 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13848 goto tls_ldgd_opt;
13849 }
13850 else if (retval == 3)
13851 {
13852 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13853 goto tls_ldgd_opt;
13854 }
13855 }
13856 }
13857 }
13858 break;
13859
13860 case R_PPC64_GOT_TPREL16_HI:
13861 case R_PPC64_GOT_TPREL16_HA:
13862 if (tls_mask != 0
13863 && (tls_mask & TLS_TPREL) == 0)
13864 {
13865 rel->r_offset -= d_offset;
13866 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13867 r_type = R_PPC64_NONE;
13868 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13869 }
13870 break;
13871
13872 case R_PPC64_GOT_TPREL16_DS:
13873 case R_PPC64_GOT_TPREL16_LO_DS:
13874 if (tls_mask != 0
13875 && (tls_mask & TLS_TPREL) == 0)
13876 {
13877 toctprel:
13878 insn = bfd_get_32 (input_bfd,
13879 contents + rel->r_offset - d_offset);
13880 insn &= 31 << 21;
13881 insn |= 0x3c0d0000; /* addis 0,13,0 */
13882 bfd_put_32 (input_bfd, insn,
13883 contents + rel->r_offset - d_offset);
13884 r_type = R_PPC64_TPREL16_HA;
13885 if (toc_symndx != 0)
13886 {
13887 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13888 rel->r_addend = toc_addend;
13889 /* We changed the symbol. Start over in order to
13890 get h, sym, sec etc. right. */
13891 goto again;
13892 }
13893 else
13894 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13895 }
13896 break;
13897
13898 case R_PPC64_TLS:
13899 if (tls_mask != 0
13900 && (tls_mask & TLS_TPREL) == 0)
13901 {
13902 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13903 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13904 if (insn == 0)
13905 abort ();
13906 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13907 /* Was PPC64_TLS which sits on insn boundary, now
13908 PPC64_TPREL16_LO which is at low-order half-word. */
13909 rel->r_offset += d_offset;
13910 r_type = R_PPC64_TPREL16_LO;
13911 if (toc_symndx != 0)
13912 {
13913 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13914 rel->r_addend = toc_addend;
13915 /* We changed the symbol. Start over in order to
13916 get h, sym, sec etc. right. */
13917 goto again;
13918 }
13919 else
13920 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13921 }
13922 break;
13923
13924 case R_PPC64_GOT_TLSGD16_HI:
13925 case R_PPC64_GOT_TLSGD16_HA:
13926 tls_gd = TLS_TPRELGD;
13927 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13928 goto tls_gdld_hi;
13929 break;
13930
13931 case R_PPC64_GOT_TLSLD16_HI:
13932 case R_PPC64_GOT_TLSLD16_HA:
13933 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13934 {
13935 tls_gdld_hi:
13936 if ((tls_mask & tls_gd) != 0)
13937 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13938 + R_PPC64_GOT_TPREL16_DS);
13939 else
13940 {
13941 rel->r_offset -= d_offset;
13942 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13943 r_type = R_PPC64_NONE;
13944 }
13945 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13946 }
13947 break;
13948
13949 case R_PPC64_GOT_TLSGD16:
13950 case R_PPC64_GOT_TLSGD16_LO:
13951 tls_gd = TLS_TPRELGD;
13952 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13953 goto tls_ldgd_opt;
13954 break;
13955
13956 case R_PPC64_GOT_TLSLD16:
13957 case R_PPC64_GOT_TLSLD16_LO:
13958 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13959 {
13960 unsigned int insn1, insn2;
13961 bfd_vma offset;
13962
13963 tls_ldgd_opt:
13964 offset = (bfd_vma) -1;
13965 /* If not using the newer R_PPC64_TLSGD/LD to mark
13966 __tls_get_addr calls, we must trust that the call
13967 stays with its arg setup insns, ie. that the next
13968 reloc is the __tls_get_addr call associated with
13969 the current reloc. Edit both insns. */
13970 if (input_section->has_tls_get_addr_call
13971 && rel + 1 < relend
13972 && branch_reloc_hash_match (input_bfd, rel + 1,
13973 htab->tls_get_addr,
13974 htab->tls_get_addr_fd))
13975 offset = rel[1].r_offset;
13976 /* We read the low GOT_TLS (or TOC16) insn because we
13977 need to keep the destination reg. It may be
13978 something other than the usual r3, and moved to r3
13979 before the call by intervening code. */
13980 insn1 = bfd_get_32 (input_bfd,
13981 contents + rel->r_offset - d_offset);
13982 if ((tls_mask & tls_gd) != 0)
13983 {
13984 /* IE */
13985 insn1 &= (0x1f << 21) | (0x1f << 16);
13986 insn1 |= 58 << 26; /* ld */
13987 insn2 = 0x7c636a14; /* add 3,3,13 */
13988 if (offset != (bfd_vma) -1)
13989 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13990 if ((tls_mask & TLS_EXPLICIT) == 0)
13991 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13992 + R_PPC64_GOT_TPREL16_DS);
13993 else
13994 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13995 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13996 }
13997 else
13998 {
13999 /* LE */
14000 insn1 &= 0x1f << 21;
14001 insn1 |= 0x3c0d0000; /* addis r,13,0 */
14002 insn2 = 0x38630000; /* addi 3,3,0 */
14003 if (tls_gd == 0)
14004 {
14005 /* Was an LD reloc. */
14006 if (toc_symndx)
14007 sec = local_sections[toc_symndx];
14008 for (r_symndx = 0;
14009 r_symndx < symtab_hdr->sh_info;
14010 r_symndx++)
14011 if (local_sections[r_symndx] == sec)
14012 break;
14013 if (r_symndx >= symtab_hdr->sh_info)
14014 r_symndx = STN_UNDEF;
14015 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14016 if (r_symndx != STN_UNDEF)
14017 rel->r_addend -= (local_syms[r_symndx].st_value
14018 + sec->output_offset
14019 + sec->output_section->vma);
14020 }
14021 else if (toc_symndx != 0)
14022 {
14023 r_symndx = toc_symndx;
14024 rel->r_addend = toc_addend;
14025 }
14026 r_type = R_PPC64_TPREL16_HA;
14027 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14028 if (offset != (bfd_vma) -1)
14029 {
14030 rel[1].r_info = ELF64_R_INFO (r_symndx,
14031 R_PPC64_TPREL16_LO);
14032 rel[1].r_offset = offset + d_offset;
14033 rel[1].r_addend = rel->r_addend;
14034 }
14035 }
14036 bfd_put_32 (input_bfd, insn1,
14037 contents + rel->r_offset - d_offset);
14038 if (offset != (bfd_vma) -1)
14039 bfd_put_32 (input_bfd, insn2, contents + offset);
14040 if ((tls_mask & tls_gd) == 0
14041 && (tls_gd == 0 || toc_symndx != 0))
14042 {
14043 /* We changed the symbol. Start over in order
14044 to get h, sym, sec etc. right. */
14045 goto again;
14046 }
14047 }
14048 break;
14049
14050 case R_PPC64_TLSGD:
14051 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
14052 {
14053 unsigned int insn2;
14054 bfd_vma offset = rel->r_offset;
14055
14056 if ((tls_mask & TLS_TPRELGD) != 0)
14057 {
14058 /* IE */
14059 r_type = R_PPC64_NONE;
14060 insn2 = 0x7c636a14; /* add 3,3,13 */
14061 }
14062 else
14063 {
14064 /* LE */
14065 if (toc_symndx != 0)
14066 {
14067 r_symndx = toc_symndx;
14068 rel->r_addend = toc_addend;
14069 }
14070 r_type = R_PPC64_TPREL16_LO;
14071 rel->r_offset = offset + d_offset;
14072 insn2 = 0x38630000; /* addi 3,3,0 */
14073 }
14074 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14075 /* Zap the reloc on the _tls_get_addr call too. */
14076 BFD_ASSERT (offset == rel[1].r_offset);
14077 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14078 bfd_put_32 (input_bfd, insn2, contents + offset);
14079 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14080 goto again;
14081 }
14082 break;
14083
14084 case R_PPC64_TLSLD:
14085 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
14086 {
14087 unsigned int insn2;
14088 bfd_vma offset = rel->r_offset;
14089
14090 if (toc_symndx)
14091 sec = local_sections[toc_symndx];
14092 for (r_symndx = 0;
14093 r_symndx < symtab_hdr->sh_info;
14094 r_symndx++)
14095 if (local_sections[r_symndx] == sec)
14096 break;
14097 if (r_symndx >= symtab_hdr->sh_info)
14098 r_symndx = STN_UNDEF;
14099 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14100 if (r_symndx != STN_UNDEF)
14101 rel->r_addend -= (local_syms[r_symndx].st_value
14102 + sec->output_offset
14103 + sec->output_section->vma);
14104
14105 r_type = R_PPC64_TPREL16_LO;
14106 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14107 rel->r_offset = offset + d_offset;
14108 /* Zap the reloc on the _tls_get_addr call too. */
14109 BFD_ASSERT (offset == rel[1].r_offset);
14110 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14111 insn2 = 0x38630000; /* addi 3,3,0 */
14112 bfd_put_32 (input_bfd, insn2, contents + offset);
14113 goto again;
14114 }
14115 break;
14116
14117 case R_PPC64_DTPMOD64:
14118 if (rel + 1 < relend
14119 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14120 && rel[1].r_offset == rel->r_offset + 8)
14121 {
14122 if ((tls_mask & TLS_GD) == 0)
14123 {
14124 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14125 if ((tls_mask & TLS_TPRELGD) != 0)
14126 r_type = R_PPC64_TPREL64;
14127 else
14128 {
14129 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14130 r_type = R_PPC64_NONE;
14131 }
14132 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14133 }
14134 }
14135 else
14136 {
14137 if ((tls_mask & TLS_LD) == 0)
14138 {
14139 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14140 r_type = R_PPC64_NONE;
14141 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14142 }
14143 }
14144 break;
14145
14146 case R_PPC64_TPREL64:
14147 if ((tls_mask & TLS_TPREL) == 0)
14148 {
14149 r_type = R_PPC64_NONE;
14150 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14151 }
14152 break;
14153
14154 case R_PPC64_ENTRY:
14155 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14156 if (!bfd_link_pic (info)
14157 && !info->traditional_format
14158 && relocation + 0x80008000 <= 0xffffffff)
14159 {
14160 unsigned int insn1, insn2;
14161
14162 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14163 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14164 if ((insn1 & ~0xfffc) == LD_R2_0R12
14165 && insn2 == ADD_R2_R2_R12)
14166 {
14167 bfd_put_32 (input_bfd,
14168 LIS_R2 + PPC_HA (relocation),
14169 contents + rel->r_offset);
14170 bfd_put_32 (input_bfd,
14171 ADDI_R2_R2 + PPC_LO (relocation),
14172 contents + rel->r_offset + 4);
14173 }
14174 }
14175 else
14176 {
14177 relocation -= (rel->r_offset
14178 + input_section->output_offset
14179 + input_section->output_section->vma);
14180 if (relocation + 0x80008000 <= 0xffffffff)
14181 {
14182 unsigned int insn1, insn2;
14183
14184 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14185 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14186 if ((insn1 & ~0xfffc) == LD_R2_0R12
14187 && insn2 == ADD_R2_R2_R12)
14188 {
14189 bfd_put_32 (input_bfd,
14190 ADDIS_R2_R12 + PPC_HA (relocation),
14191 contents + rel->r_offset);
14192 bfd_put_32 (input_bfd,
14193 ADDI_R2_R2 + PPC_LO (relocation),
14194 contents + rel->r_offset + 4);
14195 }
14196 }
14197 }
14198 break;
14199
14200 case R_PPC64_REL16_HA:
14201 /* If we are generating a non-PIC executable, edit
14202 . 0: addis 2,12,.TOC.-0b@ha
14203 . addi 2,2,.TOC.-0b@l
14204 used by ELFv2 global entry points to set up r2, to
14205 . lis 2,.TOC.@ha
14206 . addi 2,2,.TOC.@l
14207 if .TOC. is in range. */
14208 if (!bfd_link_pic (info)
14209 && !info->traditional_format
14210 && !htab->opd_abi
14211 && rel->r_addend == d_offset
14212 && h != NULL && &h->elf == htab->elf.hgot
14213 && rel + 1 < relend
14214 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14215 && rel[1].r_offset == rel->r_offset + 4
14216 && rel[1].r_addend == rel->r_addend + 4
14217 && relocation + 0x80008000 <= 0xffffffff)
14218 {
14219 unsigned int insn1, insn2;
14220 bfd_vma offset = rel->r_offset - d_offset;
14221 insn1 = bfd_get_32 (input_bfd, contents + offset);
14222 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14223 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14224 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14225 {
14226 r_type = R_PPC64_ADDR16_HA;
14227 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14228 rel->r_addend -= d_offset;
14229 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14230 rel[1].r_addend -= d_offset + 4;
14231 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14232 }
14233 }
14234 break;
14235 }
14236
14237 /* Handle other relocations that tweak non-addend part of insn. */
14238 insn = 0;
14239 max_br_offset = 1 << 25;
14240 addend = rel->r_addend;
14241 reloc_dest = DEST_NORMAL;
14242 switch (r_type)
14243 {
14244 default:
14245 break;
14246
14247 case R_PPC64_TOCSAVE:
14248 if (relocation + addend == (rel->r_offset
14249 + input_section->output_offset
14250 + input_section->output_section->vma)
14251 && tocsave_find (htab, NO_INSERT,
14252 &local_syms, rel, input_bfd))
14253 {
14254 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14255 if (insn == NOP
14256 || insn == CROR_151515 || insn == CROR_313131)
14257 bfd_put_32 (input_bfd,
14258 STD_R2_0R1 + STK_TOC (htab),
14259 contents + rel->r_offset);
14260 }
14261 break;
14262
14263 /* Branch taken prediction relocations. */
14264 case R_PPC64_ADDR14_BRTAKEN:
14265 case R_PPC64_REL14_BRTAKEN:
14266 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14267 /* Fall through. */
14268
14269 /* Branch not taken prediction relocations. */
14270 case R_PPC64_ADDR14_BRNTAKEN:
14271 case R_PPC64_REL14_BRNTAKEN:
14272 insn |= bfd_get_32 (input_bfd,
14273 contents + rel->r_offset) & ~(0x01 << 21);
14274 /* Fall through. */
14275
14276 case R_PPC64_REL14:
14277 max_br_offset = 1 << 15;
14278 /* Fall through. */
14279
14280 case R_PPC64_REL24:
14281 /* Calls to functions with a different TOC, such as calls to
14282 shared objects, need to alter the TOC pointer. This is
14283 done using a linkage stub. A REL24 branching to these
14284 linkage stubs needs to be followed by a nop, as the nop
14285 will be replaced with an instruction to restore the TOC
14286 base pointer. */
14287 fdh = h;
14288 if (h != NULL
14289 && h->oh != NULL
14290 && h->oh->is_func_descriptor)
14291 fdh = ppc_follow_link (h->oh);
14292 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14293 htab);
14294 if (stub_entry != NULL
14295 && (stub_entry->stub_type == ppc_stub_plt_call
14296 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14297 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14298 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14299 {
14300 bfd_boolean can_plt_call = FALSE;
14301
14302 if (stub_entry->stub_type == ppc_stub_plt_call
14303 && !htab->opd_abi
14304 && htab->params->plt_localentry0 != 0
14305 && is_elfv2_localentry0 (&h->elf))
14306 {
14307 /* The function doesn't use or change r2. */
14308 can_plt_call = TRUE;
14309 }
14310
14311 /* All of these stubs may modify r2, so there must be a
14312 branch and link followed by a nop. The nop is
14313 replaced by an insn to restore r2. */
14314 else if (rel->r_offset + 8 <= input_section->size)
14315 {
14316 unsigned long br;
14317
14318 br = bfd_get_32 (input_bfd,
14319 contents + rel->r_offset);
14320 if ((br & 1) != 0)
14321 {
14322 unsigned long nop;
14323
14324 nop = bfd_get_32 (input_bfd,
14325 contents + rel->r_offset + 4);
14326 if (nop == NOP
14327 || nop == CROR_151515 || nop == CROR_313131)
14328 {
14329 if (h != NULL
14330 && (h == htab->tls_get_addr_fd
14331 || h == htab->tls_get_addr)
14332 && htab->params->tls_get_addr_opt)
14333 {
14334 /* Special stub used, leave nop alone. */
14335 }
14336 else
14337 bfd_put_32 (input_bfd,
14338 LD_R2_0R1 + STK_TOC (htab),
14339 contents + rel->r_offset + 4);
14340 can_plt_call = TRUE;
14341 }
14342 }
14343 }
14344
14345 if (!can_plt_call && h != NULL)
14346 {
14347 const char *name = h->elf.root.root.string;
14348
14349 if (*name == '.')
14350 ++name;
14351
14352 if (strncmp (name, "__libc_start_main", 17) == 0
14353 && (name[17] == 0 || name[17] == '@'))
14354 {
14355 /* Allow crt1 branch to go via a toc adjusting
14356 stub. Other calls that never return could do
14357 the same, if we could detect such. */
14358 can_plt_call = TRUE;
14359 }
14360 }
14361
14362 if (!can_plt_call)
14363 {
14364 /* g++ as of 20130507 emits self-calls without a
14365 following nop. This is arguably wrong since we
14366 have conflicting information. On the one hand a
14367 global symbol and on the other a local call
14368 sequence, but don't error for this special case.
14369 It isn't possible to cheaply verify we have
14370 exactly such a call. Allow all calls to the same
14371 section. */
14372 asection *code_sec = sec;
14373
14374 if (get_opd_info (sec) != NULL)
14375 {
14376 bfd_vma off = (relocation + addend
14377 - sec->output_section->vma
14378 - sec->output_offset);
14379
14380 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14381 }
14382 if (code_sec == input_section)
14383 can_plt_call = TRUE;
14384 }
14385
14386 if (!can_plt_call)
14387 {
14388 if (stub_entry->stub_type == ppc_stub_plt_call
14389 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14390 info->callbacks->einfo
14391 /* xgettext:c-format */
14392 (_("%H: call to `%T' lacks nop, can't restore toc; "
14393 "recompile with -fPIC\n"),
14394 input_bfd, input_section, rel->r_offset, sym_name);
14395 else
14396 info->callbacks->einfo
14397 /* xgettext:c-format */
14398 (_("%H: call to `%T' lacks nop, can't restore toc; "
14399 "(-mcmodel=small toc adjust stub)\n"),
14400 input_bfd, input_section, rel->r_offset, sym_name);
14401
14402 bfd_set_error (bfd_error_bad_value);
14403 ret = FALSE;
14404 }
14405
14406 if (can_plt_call
14407 && (stub_entry->stub_type == ppc_stub_plt_call
14408 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14409 unresolved_reloc = FALSE;
14410 }
14411
14412 if ((stub_entry == NULL
14413 || stub_entry->stub_type == ppc_stub_long_branch
14414 || stub_entry->stub_type == ppc_stub_plt_branch)
14415 && get_opd_info (sec) != NULL)
14416 {
14417 /* The branch destination is the value of the opd entry. */
14418 bfd_vma off = (relocation + addend
14419 - sec->output_section->vma
14420 - sec->output_offset);
14421 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14422 if (dest != (bfd_vma) -1)
14423 {
14424 relocation = dest;
14425 addend = 0;
14426 reloc_dest = DEST_OPD;
14427 }
14428 }
14429
14430 /* If the branch is out of reach we ought to have a long
14431 branch stub. */
14432 from = (rel->r_offset
14433 + input_section->output_offset
14434 + input_section->output_section->vma);
14435
14436 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14437 ? fdh->elf.other
14438 : sym->st_other);
14439
14440 if (stub_entry != NULL
14441 && (stub_entry->stub_type == ppc_stub_long_branch
14442 || stub_entry->stub_type == ppc_stub_plt_branch)
14443 && (r_type == R_PPC64_ADDR14_BRTAKEN
14444 || r_type == R_PPC64_ADDR14_BRNTAKEN
14445 || (relocation + addend - from + max_br_offset
14446 < 2 * max_br_offset)))
14447 /* Don't use the stub if this branch is in range. */
14448 stub_entry = NULL;
14449
14450 if (stub_entry != NULL)
14451 {
14452 /* Munge up the value and addend so that we call the stub
14453 rather than the procedure directly. */
14454 asection *stub_sec = stub_entry->group->stub_sec;
14455
14456 if (stub_entry->stub_type == ppc_stub_save_res)
14457 relocation += (stub_sec->output_offset
14458 + stub_sec->output_section->vma
14459 + stub_sec->size - htab->sfpr->size
14460 - htab->sfpr->output_offset
14461 - htab->sfpr->output_section->vma);
14462 else
14463 relocation = (stub_entry->stub_offset
14464 + stub_sec->output_offset
14465 + stub_sec->output_section->vma);
14466 addend = 0;
14467 reloc_dest = DEST_STUB;
14468
14469 if ((stub_entry->stub_type == ppc_stub_plt_call
14470 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14471 && (ALWAYS_EMIT_R2SAVE
14472 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14473 && rel + 1 < relend
14474 && rel[1].r_offset == rel->r_offset + 4
14475 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14476 relocation += 4;
14477 }
14478
14479 if (insn != 0)
14480 {
14481 if (is_isa_v2)
14482 {
14483 /* Set 'a' bit. This is 0b00010 in BO field for branch
14484 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14485 for branch on CTR insns (BO == 1a00t or 1a01t). */
14486 if ((insn & (0x14 << 21)) == (0x04 << 21))
14487 insn |= 0x02 << 21;
14488 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14489 insn |= 0x08 << 21;
14490 else
14491 break;
14492 }
14493 else
14494 {
14495 /* Invert 'y' bit if not the default. */
14496 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14497 insn ^= 0x01 << 21;
14498 }
14499
14500 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14501 }
14502
14503 /* NOP out calls to undefined weak functions.
14504 We can thus call a weak function without first
14505 checking whether the function is defined. */
14506 else if (h != NULL
14507 && h->elf.root.type == bfd_link_hash_undefweak
14508 && h->elf.dynindx == -1
14509 && r_type == R_PPC64_REL24
14510 && relocation == 0
14511 && addend == 0)
14512 {
14513 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14514 goto copy_reloc;
14515 }
14516 break;
14517 }
14518
14519 /* Set `addend'. */
14520 tls_type = 0;
14521 switch (r_type)
14522 {
14523 default:
14524 info->callbacks->einfo
14525 /* xgettext:c-format */
14526 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14527 input_bfd, (int) r_type, sym_name);
14528
14529 bfd_set_error (bfd_error_bad_value);
14530 ret = FALSE;
14531 goto copy_reloc;
14532
14533 case R_PPC64_NONE:
14534 case R_PPC64_TLS:
14535 case R_PPC64_TLSGD:
14536 case R_PPC64_TLSLD:
14537 case R_PPC64_TOCSAVE:
14538 case R_PPC64_GNU_VTINHERIT:
14539 case R_PPC64_GNU_VTENTRY:
14540 case R_PPC64_ENTRY:
14541 goto copy_reloc;
14542
14543 /* GOT16 relocations. Like an ADDR16 using the symbol's
14544 address in the GOT as relocation value instead of the
14545 symbol's value itself. Also, create a GOT entry for the
14546 symbol and put the symbol value there. */
14547 case R_PPC64_GOT_TLSGD16:
14548 case R_PPC64_GOT_TLSGD16_LO:
14549 case R_PPC64_GOT_TLSGD16_HI:
14550 case R_PPC64_GOT_TLSGD16_HA:
14551 tls_type = TLS_TLS | TLS_GD;
14552 goto dogot;
14553
14554 case R_PPC64_GOT_TLSLD16:
14555 case R_PPC64_GOT_TLSLD16_LO:
14556 case R_PPC64_GOT_TLSLD16_HI:
14557 case R_PPC64_GOT_TLSLD16_HA:
14558 tls_type = TLS_TLS | TLS_LD;
14559 goto dogot;
14560
14561 case R_PPC64_GOT_TPREL16_DS:
14562 case R_PPC64_GOT_TPREL16_LO_DS:
14563 case R_PPC64_GOT_TPREL16_HI:
14564 case R_PPC64_GOT_TPREL16_HA:
14565 tls_type = TLS_TLS | TLS_TPREL;
14566 goto dogot;
14567
14568 case R_PPC64_GOT_DTPREL16_DS:
14569 case R_PPC64_GOT_DTPREL16_LO_DS:
14570 case R_PPC64_GOT_DTPREL16_HI:
14571 case R_PPC64_GOT_DTPREL16_HA:
14572 tls_type = TLS_TLS | TLS_DTPREL;
14573 goto dogot;
14574
14575 case R_PPC64_GOT16:
14576 case R_PPC64_GOT16_LO:
14577 case R_PPC64_GOT16_HI:
14578 case R_PPC64_GOT16_HA:
14579 case R_PPC64_GOT16_DS:
14580 case R_PPC64_GOT16_LO_DS:
14581 dogot:
14582 {
14583 /* Relocation is to the entry for this symbol in the global
14584 offset table. */
14585 asection *got;
14586 bfd_vma *offp;
14587 bfd_vma off;
14588 unsigned long indx = 0;
14589 struct got_entry *ent;
14590
14591 if (tls_type == (TLS_TLS | TLS_LD)
14592 && (h == NULL
14593 || !h->elf.def_dynamic))
14594 ent = ppc64_tlsld_got (input_bfd);
14595 else
14596 {
14597 if (h != NULL)
14598 {
14599 if (!htab->elf.dynamic_sections_created
14600 || h->elf.dynindx == -1
14601 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14602 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14603 /* This is actually a static link, or it is a
14604 -Bsymbolic link and the symbol is defined
14605 locally, or the symbol was forced to be local
14606 because of a version file. */
14607 ;
14608 else
14609 {
14610 indx = h->elf.dynindx;
14611 unresolved_reloc = FALSE;
14612 }
14613 ent = h->elf.got.glist;
14614 }
14615 else
14616 {
14617 if (local_got_ents == NULL)
14618 abort ();
14619 ent = local_got_ents[r_symndx];
14620 }
14621
14622 for (; ent != NULL; ent = ent->next)
14623 if (ent->addend == orig_rel.r_addend
14624 && ent->owner == input_bfd
14625 && ent->tls_type == tls_type)
14626 break;
14627 }
14628
14629 if (ent == NULL)
14630 abort ();
14631 if (ent->is_indirect)
14632 ent = ent->got.ent;
14633 offp = &ent->got.offset;
14634 got = ppc64_elf_tdata (ent->owner)->got;
14635 if (got == NULL)
14636 abort ();
14637
14638 /* The offset must always be a multiple of 8. We use the
14639 least significant bit to record whether we have already
14640 processed this entry. */
14641 off = *offp;
14642 if ((off & 1) != 0)
14643 off &= ~1;
14644 else
14645 {
14646 /* Generate relocs for the dynamic linker, except in
14647 the case of TLSLD where we'll use one entry per
14648 module. */
14649 asection *relgot;
14650 bfd_boolean ifunc;
14651
14652 *offp = off | 1;
14653 relgot = NULL;
14654 ifunc = (h != NULL
14655 ? h->elf.type == STT_GNU_IFUNC
14656 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14657 if (ifunc)
14658 {
14659 relgot = htab->elf.irelplt;
14660 if (indx == 0)
14661 htab->local_ifunc_resolver = 1;
14662 else if (is_static_defined (&h->elf))
14663 htab->maybe_local_ifunc_resolver = 1;
14664 }
14665 else if (indx != 0
14666 || (bfd_link_pic (info)
14667 && (h == NULL
14668 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14669 || (tls_type == (TLS_TLS | TLS_LD)
14670 && !h->elf.def_dynamic))))
14671 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14672 if (relgot != NULL)
14673 {
14674 outrel.r_offset = (got->output_section->vma
14675 + got->output_offset
14676 + off);
14677 outrel.r_addend = addend;
14678 if (tls_type & (TLS_LD | TLS_GD))
14679 {
14680 outrel.r_addend = 0;
14681 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14682 if (tls_type == (TLS_TLS | TLS_GD))
14683 {
14684 loc = relgot->contents;
14685 loc += (relgot->reloc_count++
14686 * sizeof (Elf64_External_Rela));
14687 bfd_elf64_swap_reloca_out (output_bfd,
14688 &outrel, loc);
14689 outrel.r_offset += 8;
14690 outrel.r_addend = addend;
14691 outrel.r_info
14692 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14693 }
14694 }
14695 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14696 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14697 else if (tls_type == (TLS_TLS | TLS_TPREL))
14698 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14699 else if (indx != 0)
14700 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14701 else
14702 {
14703 if (ifunc)
14704 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14705 else
14706 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14707
14708 /* Write the .got section contents for the sake
14709 of prelink. */
14710 loc = got->contents + off;
14711 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14712 loc);
14713 }
14714
14715 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14716 {
14717 outrel.r_addend += relocation;
14718 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14719 {
14720 if (htab->elf.tls_sec == NULL)
14721 outrel.r_addend = 0;
14722 else
14723 outrel.r_addend -= htab->elf.tls_sec->vma;
14724 }
14725 }
14726 loc = relgot->contents;
14727 loc += (relgot->reloc_count++
14728 * sizeof (Elf64_External_Rela));
14729 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14730 }
14731
14732 /* Init the .got section contents here if we're not
14733 emitting a reloc. */
14734 else
14735 {
14736 relocation += addend;
14737 if (tls_type != 0)
14738 {
14739 if (htab->elf.tls_sec == NULL)
14740 relocation = 0;
14741 else
14742 {
14743 if (tls_type & TLS_LD)
14744 relocation = 0;
14745 else
14746 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14747 if (tls_type & TLS_TPREL)
14748 relocation += DTP_OFFSET - TP_OFFSET;
14749 }
14750
14751 if (tls_type & (TLS_GD | TLS_LD))
14752 {
14753 bfd_put_64 (output_bfd, relocation,
14754 got->contents + off + 8);
14755 relocation = 1;
14756 }
14757 }
14758 bfd_put_64 (output_bfd, relocation,
14759 got->contents + off);
14760 }
14761 }
14762
14763 if (off >= (bfd_vma) -2)
14764 abort ();
14765
14766 relocation = got->output_section->vma + got->output_offset + off;
14767 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14768 }
14769 break;
14770
14771 case R_PPC64_PLT16_HA:
14772 case R_PPC64_PLT16_HI:
14773 case R_PPC64_PLT16_LO:
14774 case R_PPC64_PLT32:
14775 case R_PPC64_PLT64:
14776 /* Relocation is to the entry for this symbol in the
14777 procedure linkage table. */
14778 {
14779 struct plt_entry **plt_list = NULL;
14780 if (h != NULL)
14781 plt_list = &h->elf.plt.plist;
14782 else if (local_got_ents != NULL)
14783 {
14784 struct plt_entry **local_plt = (struct plt_entry **)
14785 (local_got_ents + symtab_hdr->sh_info);
14786 unsigned char *local_got_tls_masks = (unsigned char *)
14787 (local_plt + symtab_hdr->sh_info);
14788 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14789 plt_list = local_plt + r_symndx;
14790 }
14791 if (plt_list)
14792 {
14793 struct plt_entry *ent;
14794
14795 for (ent = *plt_list; ent != NULL; ent = ent->next)
14796 if (ent->plt.offset != (bfd_vma) -1
14797 && ent->addend == orig_rel.r_addend)
14798 {
14799 asection *plt;
14800
14801 plt = htab->elf.splt;
14802 if (!htab->elf.dynamic_sections_created
14803 || h == NULL
14804 || h->elf.dynindx == -1)
14805 plt = htab->elf.iplt;
14806 relocation = (plt->output_section->vma
14807 + plt->output_offset
14808 + ent->plt.offset);
14809 addend = 0;
14810 unresolved_reloc = FALSE;
14811 break;
14812 }
14813 }
14814 }
14815 break;
14816
14817 case R_PPC64_TOC:
14818 /* Relocation value is TOC base. */
14819 relocation = TOCstart;
14820 if (r_symndx == STN_UNDEF)
14821 relocation += htab->sec_info[input_section->id].toc_off;
14822 else if (unresolved_reloc)
14823 ;
14824 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14825 relocation += htab->sec_info[sec->id].toc_off;
14826 else
14827 unresolved_reloc = TRUE;
14828 goto dodyn;
14829
14830 /* TOC16 relocs. We want the offset relative to the TOC base,
14831 which is the address of the start of the TOC plus 0x8000.
14832 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14833 in this order. */
14834 case R_PPC64_TOC16:
14835 case R_PPC64_TOC16_LO:
14836 case R_PPC64_TOC16_HI:
14837 case R_PPC64_TOC16_DS:
14838 case R_PPC64_TOC16_LO_DS:
14839 case R_PPC64_TOC16_HA:
14840 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14841 break;
14842
14843 /* Relocate against the beginning of the section. */
14844 case R_PPC64_SECTOFF:
14845 case R_PPC64_SECTOFF_LO:
14846 case R_PPC64_SECTOFF_HI:
14847 case R_PPC64_SECTOFF_DS:
14848 case R_PPC64_SECTOFF_LO_DS:
14849 case R_PPC64_SECTOFF_HA:
14850 if (sec != NULL)
14851 addend -= sec->output_section->vma;
14852 break;
14853
14854 case R_PPC64_REL16:
14855 case R_PPC64_REL16_LO:
14856 case R_PPC64_REL16_HI:
14857 case R_PPC64_REL16_HA:
14858 case R_PPC64_REL16DX_HA:
14859 break;
14860
14861 case R_PPC64_REL14:
14862 case R_PPC64_REL14_BRNTAKEN:
14863 case R_PPC64_REL14_BRTAKEN:
14864 case R_PPC64_REL24:
14865 break;
14866
14867 case R_PPC64_TPREL16:
14868 case R_PPC64_TPREL16_LO:
14869 case R_PPC64_TPREL16_HI:
14870 case R_PPC64_TPREL16_HA:
14871 case R_PPC64_TPREL16_DS:
14872 case R_PPC64_TPREL16_LO_DS:
14873 case R_PPC64_TPREL16_HIGH:
14874 case R_PPC64_TPREL16_HIGHA:
14875 case R_PPC64_TPREL16_HIGHER:
14876 case R_PPC64_TPREL16_HIGHERA:
14877 case R_PPC64_TPREL16_HIGHEST:
14878 case R_PPC64_TPREL16_HIGHESTA:
14879 if (h != NULL
14880 && h->elf.root.type == bfd_link_hash_undefweak
14881 && h->elf.dynindx == -1)
14882 {
14883 /* Make this relocation against an undefined weak symbol
14884 resolve to zero. This is really just a tweak, since
14885 code using weak externs ought to check that they are
14886 defined before using them. */
14887 bfd_byte *p = contents + rel->r_offset - d_offset;
14888
14889 insn = bfd_get_32 (input_bfd, p);
14890 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14891 if (insn != 0)
14892 bfd_put_32 (input_bfd, insn, p);
14893 break;
14894 }
14895 if (htab->elf.tls_sec != NULL)
14896 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14897 /* The TPREL16 relocs shouldn't really be used in shared
14898 libs or with non-local symbols as that will result in
14899 DT_TEXTREL being set, but support them anyway. */
14900 goto dodyn;
14901
14902 case R_PPC64_DTPREL16:
14903 case R_PPC64_DTPREL16_LO:
14904 case R_PPC64_DTPREL16_HI:
14905 case R_PPC64_DTPREL16_HA:
14906 case R_PPC64_DTPREL16_DS:
14907 case R_PPC64_DTPREL16_LO_DS:
14908 case R_PPC64_DTPREL16_HIGH:
14909 case R_PPC64_DTPREL16_HIGHA:
14910 case R_PPC64_DTPREL16_HIGHER:
14911 case R_PPC64_DTPREL16_HIGHERA:
14912 case R_PPC64_DTPREL16_HIGHEST:
14913 case R_PPC64_DTPREL16_HIGHESTA:
14914 if (htab->elf.tls_sec != NULL)
14915 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14916 break;
14917
14918 case R_PPC64_ADDR64_LOCAL:
14919 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14920 ? h->elf.other
14921 : sym->st_other);
14922 break;
14923
14924 case R_PPC64_DTPMOD64:
14925 relocation = 1;
14926 addend = 0;
14927 goto dodyn;
14928
14929 case R_PPC64_TPREL64:
14930 if (htab->elf.tls_sec != NULL)
14931 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14932 goto dodyn;
14933
14934 case R_PPC64_DTPREL64:
14935 if (htab->elf.tls_sec != NULL)
14936 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14937 /* Fall through. */
14938
14939 /* Relocations that may need to be propagated if this is a
14940 dynamic object. */
14941 case R_PPC64_REL30:
14942 case R_PPC64_REL32:
14943 case R_PPC64_REL64:
14944 case R_PPC64_ADDR14:
14945 case R_PPC64_ADDR14_BRNTAKEN:
14946 case R_PPC64_ADDR14_BRTAKEN:
14947 case R_PPC64_ADDR16:
14948 case R_PPC64_ADDR16_DS:
14949 case R_PPC64_ADDR16_HA:
14950 case R_PPC64_ADDR16_HI:
14951 case R_PPC64_ADDR16_HIGH:
14952 case R_PPC64_ADDR16_HIGHA:
14953 case R_PPC64_ADDR16_HIGHER:
14954 case R_PPC64_ADDR16_HIGHERA:
14955 case R_PPC64_ADDR16_HIGHEST:
14956 case R_PPC64_ADDR16_HIGHESTA:
14957 case R_PPC64_ADDR16_LO:
14958 case R_PPC64_ADDR16_LO_DS:
14959 case R_PPC64_ADDR24:
14960 case R_PPC64_ADDR32:
14961 case R_PPC64_ADDR64:
14962 case R_PPC64_UADDR16:
14963 case R_PPC64_UADDR32:
14964 case R_PPC64_UADDR64:
14965 dodyn:
14966 if ((input_section->flags & SEC_ALLOC) == 0)
14967 break;
14968
14969 if (NO_OPD_RELOCS && is_opd)
14970 break;
14971
14972 if (bfd_link_pic (info)
14973 ? ((h == NULL
14974 || h->dyn_relocs != NULL)
14975 && ((h != NULL && pc_dynrelocs (h))
14976 || must_be_dyn_reloc (info, r_type)))
14977 : (h != NULL
14978 ? h->dyn_relocs != NULL
14979 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14980 {
14981 bfd_boolean skip, relocate;
14982 asection *sreloc;
14983 bfd_vma out_off;
14984 long indx = 0;
14985
14986 /* When generating a dynamic object, these relocations
14987 are copied into the output file to be resolved at run
14988 time. */
14989
14990 skip = FALSE;
14991 relocate = FALSE;
14992
14993 out_off = _bfd_elf_section_offset (output_bfd, info,
14994 input_section, rel->r_offset);
14995 if (out_off == (bfd_vma) -1)
14996 skip = TRUE;
14997 else if (out_off == (bfd_vma) -2)
14998 skip = TRUE, relocate = TRUE;
14999 out_off += (input_section->output_section->vma
15000 + input_section->output_offset);
15001 outrel.r_offset = out_off;
15002 outrel.r_addend = rel->r_addend;
15003
15004 /* Optimize unaligned reloc use. */
15005 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
15006 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
15007 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
15008 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
15009 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
15010 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
15011 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
15012 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
15013 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
15014
15015 if (skip)
15016 memset (&outrel, 0, sizeof outrel);
15017 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
15018 && !is_opd
15019 && r_type != R_PPC64_TOC)
15020 {
15021 indx = h->elf.dynindx;
15022 BFD_ASSERT (indx != -1);
15023 outrel.r_info = ELF64_R_INFO (indx, r_type);
15024 }
15025 else
15026 {
15027 /* This symbol is local, or marked to become local,
15028 or this is an opd section reloc which must point
15029 at a local function. */
15030 outrel.r_addend += relocation;
15031 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
15032 {
15033 if (is_opd && h != NULL)
15034 {
15035 /* Lie about opd entries. This case occurs
15036 when building shared libraries and we
15037 reference a function in another shared
15038 lib. The same thing happens for a weak
15039 definition in an application that's
15040 overridden by a strong definition in a
15041 shared lib. (I believe this is a generic
15042 bug in binutils handling of weak syms.)
15043 In these cases we won't use the opd
15044 entry in this lib. */
15045 unresolved_reloc = FALSE;
15046 }
15047 if (!is_opd
15048 && r_type == R_PPC64_ADDR64
15049 && (h != NULL
15050 ? h->elf.type == STT_GNU_IFUNC
15051 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15052 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15053 else
15054 {
15055 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15056
15057 /* We need to relocate .opd contents for ld.so.
15058 Prelink also wants simple and consistent rules
15059 for relocs. This make all RELATIVE relocs have
15060 *r_offset equal to r_addend. */
15061 relocate = TRUE;
15062 }
15063 }
15064 else
15065 {
15066 if (h != NULL
15067 ? h->elf.type == STT_GNU_IFUNC
15068 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15069 {
15070 info->callbacks->einfo
15071 /* xgettext:c-format */
15072 (_("%H: %s for indirect "
15073 "function `%T' unsupported\n"),
15074 input_bfd, input_section, rel->r_offset,
15075 ppc64_elf_howto_table[r_type]->name,
15076 sym_name);
15077 ret = FALSE;
15078 }
15079 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15080 ;
15081 else if (sec == NULL || sec->owner == NULL)
15082 {
15083 bfd_set_error (bfd_error_bad_value);
15084 return FALSE;
15085 }
15086 else
15087 {
15088 asection *osec;
15089
15090 osec = sec->output_section;
15091 indx = elf_section_data (osec)->dynindx;
15092
15093 if (indx == 0)
15094 {
15095 if ((osec->flags & SEC_READONLY) == 0
15096 && htab->elf.data_index_section != NULL)
15097 osec = htab->elf.data_index_section;
15098 else
15099 osec = htab->elf.text_index_section;
15100 indx = elf_section_data (osec)->dynindx;
15101 }
15102 BFD_ASSERT (indx != 0);
15103
15104 /* We are turning this relocation into one
15105 against a section symbol, so subtract out
15106 the output section's address but not the
15107 offset of the input section in the output
15108 section. */
15109 outrel.r_addend -= osec->vma;
15110 }
15111
15112 outrel.r_info = ELF64_R_INFO (indx, r_type);
15113 }
15114 }
15115
15116 sreloc = elf_section_data (input_section)->sreloc;
15117 if (h != NULL
15118 ? h->elf.type == STT_GNU_IFUNC
15119 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15120 {
15121 sreloc = htab->elf.irelplt;
15122 if (indx == 0)
15123 htab->local_ifunc_resolver = 1;
15124 else if (is_static_defined (&h->elf))
15125 htab->maybe_local_ifunc_resolver = 1;
15126 }
15127 if (sreloc == NULL)
15128 abort ();
15129
15130 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15131 >= sreloc->size)
15132 abort ();
15133 loc = sreloc->contents;
15134 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15135 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15136
15137 /* If this reloc is against an external symbol, it will
15138 be computed at runtime, so there's no need to do
15139 anything now. However, for the sake of prelink ensure
15140 that the section contents are a known value. */
15141 if (! relocate)
15142 {
15143 unresolved_reloc = FALSE;
15144 /* The value chosen here is quite arbitrary as ld.so
15145 ignores section contents except for the special
15146 case of .opd where the contents might be accessed
15147 before relocation. Choose zero, as that won't
15148 cause reloc overflow. */
15149 relocation = 0;
15150 addend = 0;
15151 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15152 to improve backward compatibility with older
15153 versions of ld. */
15154 if (r_type == R_PPC64_ADDR64)
15155 addend = outrel.r_addend;
15156 /* Adjust pc_relative relocs to have zero in *r_offset. */
15157 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15158 addend = outrel.r_offset;
15159 }
15160 }
15161 break;
15162
15163 case R_PPC64_COPY:
15164 case R_PPC64_GLOB_DAT:
15165 case R_PPC64_JMP_SLOT:
15166 case R_PPC64_JMP_IREL:
15167 case R_PPC64_RELATIVE:
15168 /* We shouldn't ever see these dynamic relocs in relocatable
15169 files. */
15170 /* Fall through. */
15171
15172 case R_PPC64_PLTGOT16:
15173 case R_PPC64_PLTGOT16_DS:
15174 case R_PPC64_PLTGOT16_HA:
15175 case R_PPC64_PLTGOT16_HI:
15176 case R_PPC64_PLTGOT16_LO:
15177 case R_PPC64_PLTGOT16_LO_DS:
15178 case R_PPC64_PLTREL32:
15179 case R_PPC64_PLTREL64:
15180 /* These ones haven't been implemented yet. */
15181
15182 info->callbacks->einfo
15183 /* xgettext:c-format */
15184 (_("%P: %B: %s is not supported for `%T'\n"),
15185 input_bfd,
15186 ppc64_elf_howto_table[r_type]->name, sym_name);
15187
15188 bfd_set_error (bfd_error_invalid_operation);
15189 ret = FALSE;
15190 goto copy_reloc;
15191 }
15192
15193 /* Multi-instruction sequences that access the TOC can be
15194 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15195 to nop; addi rb,r2,x; */
15196 howto = ppc64_elf_howto_table[(int) r_type];
15197 switch (r_type)
15198 {
15199 default:
15200 break;
15201
15202 case R_PPC64_GOT_TLSLD16_HI:
15203 case R_PPC64_GOT_TLSGD16_HI:
15204 case R_PPC64_GOT_TPREL16_HI:
15205 case R_PPC64_GOT_DTPREL16_HI:
15206 case R_PPC64_GOT16_HI:
15207 case R_PPC64_TOC16_HI:
15208 /* These relocs would only be useful if building up an
15209 offset to later add to r2, perhaps in an indexed
15210 addressing mode instruction. Don't try to optimize.
15211 Unfortunately, the possibility of someone building up an
15212 offset like this or even with the HA relocs, means that
15213 we need to check the high insn when optimizing the low
15214 insn. */
15215 break;
15216
15217 case R_PPC64_GOT_TLSLD16_HA:
15218 case R_PPC64_GOT_TLSGD16_HA:
15219 case R_PPC64_GOT_TPREL16_HA:
15220 case R_PPC64_GOT_DTPREL16_HA:
15221 case R_PPC64_GOT16_HA:
15222 case R_PPC64_TOC16_HA:
15223 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15224 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15225 {
15226 bfd_byte *p = contents + (rel->r_offset & ~3);
15227 bfd_put_32 (input_bfd, NOP, p);
15228 }
15229 break;
15230
15231 case R_PPC64_GOT_TLSLD16_LO:
15232 case R_PPC64_GOT_TLSGD16_LO:
15233 case R_PPC64_GOT_TPREL16_LO_DS:
15234 case R_PPC64_GOT_DTPREL16_LO_DS:
15235 case R_PPC64_GOT16_LO:
15236 case R_PPC64_GOT16_LO_DS:
15237 case R_PPC64_TOC16_LO:
15238 case R_PPC64_TOC16_LO_DS:
15239 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15240 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15241 {
15242 bfd_byte *p = contents + (rel->r_offset & ~3);
15243 insn = bfd_get_32 (input_bfd, p);
15244 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15245 {
15246 /* Transform addic to addi when we change reg. */
15247 insn &= ~((0x3f << 26) | (0x1f << 16));
15248 insn |= (14u << 26) | (2 << 16);
15249 }
15250 else
15251 {
15252 insn &= ~(0x1f << 16);
15253 insn |= 2 << 16;
15254 }
15255 bfd_put_32 (input_bfd, insn, p);
15256 }
15257 break;
15258
15259 case R_PPC64_TPREL16_HA:
15260 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15261 {
15262 bfd_byte *p = contents + (rel->r_offset & ~3);
15263 insn = bfd_get_32 (input_bfd, p);
15264 if ((insn & ((0x3f << 26) | 0x1f << 16))
15265 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15266 /* xgettext:c-format */
15267 info->callbacks->minfo
15268 (_("%H: warning: %s unexpected insn %#x.\n"),
15269 input_bfd, input_section, rel->r_offset, howto->name, insn);
15270 else
15271 bfd_put_32 (input_bfd, NOP, p);
15272 }
15273 break;
15274
15275 case R_PPC64_TPREL16_LO:
15276 case R_PPC64_TPREL16_LO_DS:
15277 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15278 {
15279 bfd_byte *p = contents + (rel->r_offset & ~3);
15280 insn = bfd_get_32 (input_bfd, p);
15281 insn &= ~(0x1f << 16);
15282 insn |= 13 << 16;
15283 bfd_put_32 (input_bfd, insn, p);
15284 }
15285 break;
15286 }
15287
15288 /* Do any further special processing. */
15289 switch (r_type)
15290 {
15291 default:
15292 break;
15293
15294 case R_PPC64_REL16_HA:
15295 case R_PPC64_REL16DX_HA:
15296 case R_PPC64_ADDR16_HA:
15297 case R_PPC64_ADDR16_HIGHA:
15298 case R_PPC64_ADDR16_HIGHERA:
15299 case R_PPC64_ADDR16_HIGHESTA:
15300 case R_PPC64_TOC16_HA:
15301 case R_PPC64_SECTOFF_HA:
15302 case R_PPC64_TPREL16_HA:
15303 case R_PPC64_TPREL16_HIGHA:
15304 case R_PPC64_TPREL16_HIGHERA:
15305 case R_PPC64_TPREL16_HIGHESTA:
15306 case R_PPC64_DTPREL16_HA:
15307 case R_PPC64_DTPREL16_HIGHA:
15308 case R_PPC64_DTPREL16_HIGHERA:
15309 case R_PPC64_DTPREL16_HIGHESTA:
15310 /* It's just possible that this symbol is a weak symbol
15311 that's not actually defined anywhere. In that case,
15312 'sec' would be NULL, and we should leave the symbol
15313 alone (it will be set to zero elsewhere in the link). */
15314 if (sec == NULL)
15315 break;
15316 /* Fall through. */
15317
15318 case R_PPC64_GOT16_HA:
15319 case R_PPC64_PLTGOT16_HA:
15320 case R_PPC64_PLT16_HA:
15321 case R_PPC64_GOT_TLSGD16_HA:
15322 case R_PPC64_GOT_TLSLD16_HA:
15323 case R_PPC64_GOT_TPREL16_HA:
15324 case R_PPC64_GOT_DTPREL16_HA:
15325 /* Add 0x10000 if sign bit in 0:15 is set.
15326 Bits 0:15 are not used. */
15327 addend += 0x8000;
15328 break;
15329
15330 case R_PPC64_ADDR16_DS:
15331 case R_PPC64_ADDR16_LO_DS:
15332 case R_PPC64_GOT16_DS:
15333 case R_PPC64_GOT16_LO_DS:
15334 case R_PPC64_PLT16_LO_DS:
15335 case R_PPC64_SECTOFF_DS:
15336 case R_PPC64_SECTOFF_LO_DS:
15337 case R_PPC64_TOC16_DS:
15338 case R_PPC64_TOC16_LO_DS:
15339 case R_PPC64_PLTGOT16_DS:
15340 case R_PPC64_PLTGOT16_LO_DS:
15341 case R_PPC64_GOT_TPREL16_DS:
15342 case R_PPC64_GOT_TPREL16_LO_DS:
15343 case R_PPC64_GOT_DTPREL16_DS:
15344 case R_PPC64_GOT_DTPREL16_LO_DS:
15345 case R_PPC64_TPREL16_DS:
15346 case R_PPC64_TPREL16_LO_DS:
15347 case R_PPC64_DTPREL16_DS:
15348 case R_PPC64_DTPREL16_LO_DS:
15349 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15350 mask = 3;
15351 /* If this reloc is against an lq, lxv, or stxv insn, then
15352 the value must be a multiple of 16. This is somewhat of
15353 a hack, but the "correct" way to do this by defining _DQ
15354 forms of all the _DS relocs bloats all reloc switches in
15355 this file. It doesn't make much sense to use these
15356 relocs in data, so testing the insn should be safe. */
15357 if ((insn & (0x3f << 26)) == (56u << 26)
15358 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15359 mask = 15;
15360 relocation += addend;
15361 addend = insn & (mask ^ 3);
15362 if ((relocation & mask) != 0)
15363 {
15364 relocation ^= relocation & mask;
15365 info->callbacks->einfo
15366 /* xgettext:c-format */
15367 (_("%H: error: %s not a multiple of %u\n"),
15368 input_bfd, input_section, rel->r_offset,
15369 howto->name,
15370 mask + 1);
15371 bfd_set_error (bfd_error_bad_value);
15372 ret = FALSE;
15373 goto copy_reloc;
15374 }
15375 break;
15376 }
15377
15378 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15379 because such sections are not SEC_ALLOC and thus ld.so will
15380 not process them. */
15381 if (unresolved_reloc
15382 && !((input_section->flags & SEC_DEBUGGING) != 0
15383 && h->elf.def_dynamic)
15384 && _bfd_elf_section_offset (output_bfd, info, input_section,
15385 rel->r_offset) != (bfd_vma) -1)
15386 {
15387 info->callbacks->einfo
15388 /* xgettext:c-format */
15389 (_("%H: unresolvable %s against `%T'\n"),
15390 input_bfd, input_section, rel->r_offset,
15391 howto->name,
15392 h->elf.root.root.string);
15393 ret = FALSE;
15394 }
15395
15396 /* 16-bit fields in insns mostly have signed values, but a
15397 few insns have 16-bit unsigned values. Really, we should
15398 have different reloc types. */
15399 if (howto->complain_on_overflow != complain_overflow_dont
15400 && howto->dst_mask == 0xffff
15401 && (input_section->flags & SEC_CODE) != 0)
15402 {
15403 enum complain_overflow complain = complain_overflow_signed;
15404
15405 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15406 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15407 complain = complain_overflow_bitfield;
15408 else if (howto->rightshift == 0
15409 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15410 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15411 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15412 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15413 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15414 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15415 complain = complain_overflow_unsigned;
15416 if (howto->complain_on_overflow != complain)
15417 {
15418 alt_howto = *howto;
15419 alt_howto.complain_on_overflow = complain;
15420 howto = &alt_howto;
15421 }
15422 }
15423
15424 if (r_type == R_PPC64_REL16DX_HA)
15425 {
15426 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15427 if (rel->r_offset + 4 > input_section->size)
15428 r = bfd_reloc_outofrange;
15429 else
15430 {
15431 relocation += addend;
15432 relocation -= (rel->r_offset
15433 + input_section->output_offset
15434 + input_section->output_section->vma);
15435 relocation = (bfd_signed_vma) relocation >> 16;
15436 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15437 insn &= ~0x1fffc1;
15438 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15439 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15440 r = bfd_reloc_ok;
15441 if (relocation + 0x8000 > 0xffff)
15442 r = bfd_reloc_overflow;
15443 }
15444 }
15445 else
15446 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15447 rel->r_offset, relocation, addend);
15448
15449 if (r != bfd_reloc_ok)
15450 {
15451 char *more_info = NULL;
15452 const char *reloc_name = howto->name;
15453
15454 if (reloc_dest != DEST_NORMAL)
15455 {
15456 more_info = bfd_malloc (strlen (reloc_name) + 8);
15457 if (more_info != NULL)
15458 {
15459 strcpy (more_info, reloc_name);
15460 strcat (more_info, (reloc_dest == DEST_OPD
15461 ? " (OPD)" : " (stub)"));
15462 reloc_name = more_info;
15463 }
15464 }
15465
15466 if (r == bfd_reloc_overflow)
15467 {
15468 /* On code like "if (foo) foo();" don't report overflow
15469 on a branch to zero when foo is undefined. */
15470 if (!warned
15471 && (reloc_dest == DEST_STUB
15472 || !(h != NULL
15473 && (h->elf.root.type == bfd_link_hash_undefweak
15474 || h->elf.root.type == bfd_link_hash_undefined)
15475 && is_branch_reloc (r_type))))
15476 info->callbacks->reloc_overflow (info, &h->elf.root,
15477 sym_name, reloc_name,
15478 orig_rel.r_addend,
15479 input_bfd, input_section,
15480 rel->r_offset);
15481 }
15482 else
15483 {
15484 info->callbacks->einfo
15485 /* xgettext:c-format */
15486 (_("%H: %s against `%T': error %d\n"),
15487 input_bfd, input_section, rel->r_offset,
15488 reloc_name, sym_name, (int) r);
15489 ret = FALSE;
15490 }
15491 if (more_info != NULL)
15492 free (more_info);
15493 }
15494 copy_reloc:
15495 if (wrel != rel)
15496 *wrel = *rel;
15497 }
15498
15499 if (wrel != rel)
15500 {
15501 Elf_Internal_Shdr *rel_hdr;
15502 size_t deleted = rel - wrel;
15503
15504 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15505 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15506 if (rel_hdr->sh_size == 0)
15507 {
15508 /* It is too late to remove an empty reloc section. Leave
15509 one NONE reloc.
15510 ??? What is wrong with an empty section??? */
15511 rel_hdr->sh_size = rel_hdr->sh_entsize;
15512 deleted -= 1;
15513 }
15514 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15515 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15516 input_section->reloc_count -= deleted;
15517 }
15518
15519 /* If we're emitting relocations, then shortly after this function
15520 returns, reloc offsets and addends for this section will be
15521 adjusted. Worse, reloc symbol indices will be for the output
15522 file rather than the input. Save a copy of the relocs for
15523 opd_entry_value. */
15524 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15525 {
15526 bfd_size_type amt;
15527 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15528 rel = bfd_alloc (input_bfd, amt);
15529 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15530 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15531 if (rel == NULL)
15532 return FALSE;
15533 memcpy (rel, relocs, amt);
15534 }
15535 return ret;
15536 }
15537
15538 /* Adjust the value of any local symbols in opd sections. */
15539
15540 static int
15541 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15542 const char *name ATTRIBUTE_UNUSED,
15543 Elf_Internal_Sym *elfsym,
15544 asection *input_sec,
15545 struct elf_link_hash_entry *h)
15546 {
15547 struct _opd_sec_data *opd;
15548 long adjust;
15549 bfd_vma value;
15550
15551 if (h != NULL)
15552 return 1;
15553
15554 opd = get_opd_info (input_sec);
15555 if (opd == NULL || opd->adjust == NULL)
15556 return 1;
15557
15558 value = elfsym->st_value - input_sec->output_offset;
15559 if (!bfd_link_relocatable (info))
15560 value -= input_sec->output_section->vma;
15561
15562 adjust = opd->adjust[OPD_NDX (value)];
15563 if (adjust == -1)
15564 return 2;
15565
15566 elfsym->st_value += adjust;
15567 return 1;
15568 }
15569
15570 /* Finish up dynamic symbol handling. We set the contents of various
15571 dynamic sections here. */
15572
15573 static bfd_boolean
15574 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15575 struct bfd_link_info *info,
15576 struct elf_link_hash_entry *h,
15577 Elf_Internal_Sym *sym)
15578 {
15579 struct ppc_link_hash_table *htab;
15580 struct plt_entry *ent;
15581 Elf_Internal_Rela rela;
15582 bfd_byte *loc;
15583
15584 htab = ppc_hash_table (info);
15585 if (htab == NULL)
15586 return FALSE;
15587
15588 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15589 if (ent->plt.offset != (bfd_vma) -1)
15590 {
15591 /* This symbol has an entry in the procedure linkage
15592 table. Set it up. */
15593 if (!htab->elf.dynamic_sections_created
15594 || h->dynindx == -1)
15595 {
15596 BFD_ASSERT (h->type == STT_GNU_IFUNC
15597 && h->def_regular
15598 && (h->root.type == bfd_link_hash_defined
15599 || h->root.type == bfd_link_hash_defweak));
15600 rela.r_offset = (htab->elf.iplt->output_section->vma
15601 + htab->elf.iplt->output_offset
15602 + ent->plt.offset);
15603 if (htab->opd_abi)
15604 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15605 else
15606 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15607 rela.r_addend = (h->root.u.def.value
15608 + h->root.u.def.section->output_offset
15609 + h->root.u.def.section->output_section->vma
15610 + ent->addend);
15611 loc = (htab->elf.irelplt->contents
15612 + (htab->elf.irelplt->reloc_count++
15613 * sizeof (Elf64_External_Rela)));
15614 htab->local_ifunc_resolver = 1;
15615 }
15616 else
15617 {
15618 rela.r_offset = (htab->elf.splt->output_section->vma
15619 + htab->elf.splt->output_offset
15620 + ent->plt.offset);
15621 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15622 rela.r_addend = ent->addend;
15623 loc = (htab->elf.srelplt->contents
15624 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15625 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15626 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15627 htab->maybe_local_ifunc_resolver = 1;
15628 }
15629 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15630
15631 if (!htab->opd_abi)
15632 {
15633 if (!h->def_regular)
15634 {
15635 /* Mark the symbol as undefined, rather than as
15636 defined in glink. Leave the value if there were
15637 any relocations where pointer equality matters
15638 (this is a clue for the dynamic linker, to make
15639 function pointer comparisons work between an
15640 application and shared library), otherwise set it
15641 to zero. */
15642 sym->st_shndx = SHN_UNDEF;
15643 if (!h->pointer_equality_needed)
15644 sym->st_value = 0;
15645 else if (!h->ref_regular_nonweak)
15646 {
15647 /* This breaks function pointer comparisons, but
15648 that is better than breaking tests for a NULL
15649 function pointer. */
15650 sym->st_value = 0;
15651 }
15652 }
15653 }
15654 }
15655
15656 if (h->needs_copy)
15657 {
15658 /* This symbol needs a copy reloc. Set it up. */
15659 asection *srel;
15660
15661 if (h->dynindx == -1
15662 || (h->root.type != bfd_link_hash_defined
15663 && h->root.type != bfd_link_hash_defweak)
15664 || htab->elf.srelbss == NULL
15665 || htab->elf.sreldynrelro == NULL)
15666 abort ();
15667
15668 rela.r_offset = (h->root.u.def.value
15669 + h->root.u.def.section->output_section->vma
15670 + h->root.u.def.section->output_offset);
15671 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15672 rela.r_addend = 0;
15673 if (h->root.u.def.section == htab->elf.sdynrelro)
15674 srel = htab->elf.sreldynrelro;
15675 else
15676 srel = htab->elf.srelbss;
15677 loc = srel->contents;
15678 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15679 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15680 }
15681
15682 return TRUE;
15683 }
15684
15685 /* Used to decide how to sort relocs in an optimal manner for the
15686 dynamic linker, before writing them out. */
15687
15688 static enum elf_reloc_type_class
15689 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15690 const asection *rel_sec,
15691 const Elf_Internal_Rela *rela)
15692 {
15693 enum elf_ppc64_reloc_type r_type;
15694 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15695
15696 if (rel_sec == htab->elf.irelplt)
15697 return reloc_class_ifunc;
15698
15699 r_type = ELF64_R_TYPE (rela->r_info);
15700 switch (r_type)
15701 {
15702 case R_PPC64_RELATIVE:
15703 return reloc_class_relative;
15704 case R_PPC64_JMP_SLOT:
15705 return reloc_class_plt;
15706 case R_PPC64_COPY:
15707 return reloc_class_copy;
15708 default:
15709 return reloc_class_normal;
15710 }
15711 }
15712
15713 /* Finish up the dynamic sections. */
15714
15715 static bfd_boolean
15716 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15717 struct bfd_link_info *info)
15718 {
15719 struct ppc_link_hash_table *htab;
15720 bfd *dynobj;
15721 asection *sdyn;
15722
15723 htab = ppc_hash_table (info);
15724 if (htab == NULL)
15725 return FALSE;
15726
15727 dynobj = htab->elf.dynobj;
15728 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15729
15730 if (htab->elf.dynamic_sections_created)
15731 {
15732 Elf64_External_Dyn *dyncon, *dynconend;
15733
15734 if (sdyn == NULL || htab->elf.sgot == NULL)
15735 abort ();
15736
15737 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15738 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15739 for (; dyncon < dynconend; dyncon++)
15740 {
15741 Elf_Internal_Dyn dyn;
15742 asection *s;
15743
15744 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15745
15746 switch (dyn.d_tag)
15747 {
15748 default:
15749 continue;
15750
15751 case DT_PPC64_GLINK:
15752 s = htab->glink;
15753 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15754 /* We stupidly defined DT_PPC64_GLINK to be the start
15755 of glink rather than the first entry point, which is
15756 what ld.so needs, and now have a bigger stub to
15757 support automatic multiple TOCs. */
15758 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15759 break;
15760
15761 case DT_PPC64_OPD:
15762 s = bfd_get_section_by_name (output_bfd, ".opd");
15763 if (s == NULL)
15764 continue;
15765 dyn.d_un.d_ptr = s->vma;
15766 break;
15767
15768 case DT_PPC64_OPT:
15769 if (htab->do_multi_toc && htab->multi_toc_needed)
15770 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15771 if (htab->has_plt_localentry0)
15772 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15773 break;
15774
15775 case DT_PPC64_OPDSZ:
15776 s = bfd_get_section_by_name (output_bfd, ".opd");
15777 if (s == NULL)
15778 continue;
15779 dyn.d_un.d_val = s->size;
15780 break;
15781
15782 case DT_PLTGOT:
15783 s = htab->elf.splt;
15784 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15785 break;
15786
15787 case DT_JMPREL:
15788 s = htab->elf.srelplt;
15789 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15790 break;
15791
15792 case DT_PLTRELSZ:
15793 dyn.d_un.d_val = htab->elf.srelplt->size;
15794 break;
15795
15796 case DT_TEXTREL:
15797 if (htab->local_ifunc_resolver)
15798 info->callbacks->einfo
15799 (_("%X%P: text relocations and GNU indirect "
15800 "functions will result in a segfault at runtime\n"));
15801 else if (htab->maybe_local_ifunc_resolver)
15802 info->callbacks->einfo
15803 (_("%P: warning: text relocations and GNU indirect "
15804 "functions may result in a segfault at runtime\n"));
15805 continue;
15806 }
15807
15808 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15809 }
15810 }
15811
15812 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15813 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15814 {
15815 /* Fill in the first entry in the global offset table.
15816 We use it to hold the link-time TOCbase. */
15817 bfd_put_64 (output_bfd,
15818 elf_gp (output_bfd) + TOC_BASE_OFF,
15819 htab->elf.sgot->contents);
15820
15821 /* Set .got entry size. */
15822 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15823 }
15824
15825 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15826 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15827 {
15828 /* Set .plt entry size. */
15829 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15830 = PLT_ENTRY_SIZE (htab);
15831 }
15832
15833 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15834 brlt ourselves if emitrelocations. */
15835 if (htab->brlt != NULL
15836 && htab->brlt->reloc_count != 0
15837 && !_bfd_elf_link_output_relocs (output_bfd,
15838 htab->brlt,
15839 elf_section_data (htab->brlt)->rela.hdr,
15840 elf_section_data (htab->brlt)->relocs,
15841 NULL))
15842 return FALSE;
15843
15844 if (htab->glink != NULL
15845 && htab->glink->reloc_count != 0
15846 && !_bfd_elf_link_output_relocs (output_bfd,
15847 htab->glink,
15848 elf_section_data (htab->glink)->rela.hdr,
15849 elf_section_data (htab->glink)->relocs,
15850 NULL))
15851 return FALSE;
15852
15853 if (htab->glink_eh_frame != NULL
15854 && htab->glink_eh_frame->size != 0)
15855 {
15856 bfd_vma val;
15857 bfd_byte *p;
15858 struct map_stub *group;
15859 size_t align = 4;
15860
15861 p = htab->glink_eh_frame->contents;
15862 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15863
15864 for (group = htab->group; group != NULL; group = group->next)
15865 if (group->stub_sec != NULL)
15866 {
15867 /* Offset to stub section. */
15868 val = (group->stub_sec->output_section->vma
15869 + group->stub_sec->output_offset);
15870 val -= (htab->glink_eh_frame->output_section->vma
15871 + htab->glink_eh_frame->output_offset
15872 + (p + 8 - htab->glink_eh_frame->contents));
15873 if (val + 0x80000000 > 0xffffffff)
15874 {
15875 info->callbacks->einfo
15876 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15877 group->stub_sec->name);
15878 return FALSE;
15879 }
15880 bfd_put_32 (dynobj, val, p + 8);
15881 p += stub_eh_frame_size (group, align);
15882 }
15883 if (htab->glink != NULL && htab->glink->size != 0)
15884 {
15885 /* Offset to .glink. */
15886 val = (htab->glink->output_section->vma
15887 + htab->glink->output_offset
15888 + 8);
15889 val -= (htab->glink_eh_frame->output_section->vma
15890 + htab->glink_eh_frame->output_offset
15891 + (p + 8 - htab->glink_eh_frame->contents));
15892 if (val + 0x80000000 > 0xffffffff)
15893 {
15894 info->callbacks->einfo
15895 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15896 htab->glink->name);
15897 return FALSE;
15898 }
15899 bfd_put_32 (dynobj, val, p + 8);
15900 p += (24 + align - 1) & -align;
15901 }
15902
15903 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15904 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15905 htab->glink_eh_frame,
15906 htab->glink_eh_frame->contents))
15907 return FALSE;
15908 }
15909
15910 /* We need to handle writing out multiple GOT sections ourselves,
15911 since we didn't add them to DYNOBJ. We know dynobj is the first
15912 bfd. */
15913 while ((dynobj = dynobj->link.next) != NULL)
15914 {
15915 asection *s;
15916
15917 if (!is_ppc64_elf (dynobj))
15918 continue;
15919
15920 s = ppc64_elf_tdata (dynobj)->got;
15921 if (s != NULL
15922 && s->size != 0
15923 && s->output_section != bfd_abs_section_ptr
15924 && !bfd_set_section_contents (output_bfd, s->output_section,
15925 s->contents, s->output_offset,
15926 s->size))
15927 return FALSE;
15928 s = ppc64_elf_tdata (dynobj)->relgot;
15929 if (s != NULL
15930 && s->size != 0
15931 && s->output_section != bfd_abs_section_ptr
15932 && !bfd_set_section_contents (output_bfd, s->output_section,
15933 s->contents, s->output_offset,
15934 s->size))
15935 return FALSE;
15936 }
15937
15938 return TRUE;
15939 }
15940
15941 #include "elf64-target.h"
15942
15943 /* FreeBSD support */
15944
15945 #undef TARGET_LITTLE_SYM
15946 #undef TARGET_LITTLE_NAME
15947
15948 #undef TARGET_BIG_SYM
15949 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15950 #undef TARGET_BIG_NAME
15951 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15952
15953 #undef ELF_OSABI
15954 #define ELF_OSABI ELFOSABI_FREEBSD
15955
15956 #undef elf64_bed
15957 #define elf64_bed elf64_powerpc_fbsd_bed
15958
15959 #include "elf64-target.h"
GDB Binutils - Deliverables
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