Enable support for the AArch64 dot-prod instruction in the Cortex A55 and A75 cpus.
[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 symcount = static_count;
3274 if (!relocatable)
3275 symcount += dyn_count;
3276 if (symcount == 0)
3277 return 0;
3278
3279 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3280 if (syms == NULL)
3281 return -1;
3282
3283 if (!relocatable && static_count != 0 && dyn_count != 0)
3284 {
3285 /* Use both symbol tables. */
3286 memcpy (syms, static_syms, static_count * sizeof (*syms));
3287 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3288 }
3289 else if (!relocatable && static_count == 0)
3290 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3291 else
3292 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3293
3294 synthetic_relocatable = relocatable;
3295 synthetic_opd = opd;
3296 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3297
3298 if (!relocatable && symcount > 1)
3299 {
3300 long j;
3301 /* Trim duplicate syms, since we may have merged the normal and
3302 dynamic symbols. Actually, we only care about syms that have
3303 different values, so trim any with the same value. */
3304 for (i = 1, j = 1; i < symcount; ++i)
3305 if (syms[i - 1]->value + syms[i - 1]->section->vma
3306 != syms[i]->value + syms[i]->section->vma)
3307 syms[j++] = syms[i];
3308 symcount = j;
3309 }
3310
3311 i = 0;
3312 /* Note that here and in compare_symbols we can't compare opd and
3313 sym->section directly. With separate debug info files, the
3314 symbols will be extracted from the debug file while abfd passed
3315 to this function is the real binary. */
3316 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3317 ++i;
3318 codesecsym = i;
3319
3320 for (; i < symcount; ++i)
3321 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3322 != (SEC_CODE | SEC_ALLOC))
3323 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3324 break;
3325 codesecsymend = i;
3326
3327 for (; i < symcount; ++i)
3328 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3329 break;
3330 secsymend = i;
3331
3332 if (opd != NULL)
3333 for (; i < symcount; ++i)
3334 if (strcmp (syms[i]->section->name, ".opd") != 0)
3335 break;
3336 opdsymend = i;
3337
3338 for (; i < symcount; ++i)
3339 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3340 != (SEC_CODE | SEC_ALLOC))
3341 break;
3342 symcount = i;
3343
3344 count = 0;
3345
3346 if (relocatable)
3347 {
3348 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3349 arelent *r;
3350 size_t size;
3351 long relcount;
3352
3353 if (opdsymend == secsymend)
3354 goto done;
3355
3356 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3357 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3358 if (relcount == 0)
3359 goto done;
3360
3361 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 size = 0;
3368 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3369 {
3370 asymbol *sym;
3371
3372 while (r < opd->relocation + relcount
3373 && r->address < syms[i]->value + opd->vma)
3374 ++r;
3375
3376 if (r == opd->relocation + relcount)
3377 break;
3378
3379 if (r->address != syms[i]->value + opd->vma)
3380 continue;
3381
3382 if (r->howto->type != R_PPC64_ADDR64)
3383 continue;
3384
3385 sym = *r->sym_ptr_ptr;
3386 if (!sym_exists_at (syms, opdsymend, symcount,
3387 sym->section->id, sym->value + r->addend))
3388 {
3389 ++count;
3390 size += sizeof (asymbol);
3391 size += strlen (syms[i]->name) + 2;
3392 }
3393 }
3394
3395 if (size == 0)
3396 goto done;
3397 s = *ret = bfd_malloc (size);
3398 if (s == NULL)
3399 {
3400 count = -1;
3401 goto done;
3402 }
3403
3404 names = (char *) (s + count);
3405
3406 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3407 {
3408 asymbol *sym;
3409
3410 while (r < opd->relocation + relcount
3411 && r->address < syms[i]->value + opd->vma)
3412 ++r;
3413
3414 if (r == opd->relocation + relcount)
3415 break;
3416
3417 if (r->address != syms[i]->value + opd->vma)
3418 continue;
3419
3420 if (r->howto->type != R_PPC64_ADDR64)
3421 continue;
3422
3423 sym = *r->sym_ptr_ptr;
3424 if (!sym_exists_at (syms, opdsymend, symcount,
3425 sym->section->id, sym->value + r->addend))
3426 {
3427 size_t len;
3428
3429 *s = *syms[i];
3430 s->flags |= BSF_SYNTHETIC;
3431 s->section = sym->section;
3432 s->value = sym->value + r->addend;
3433 s->name = names;
3434 *names++ = '.';
3435 len = strlen (syms[i]->name);
3436 memcpy (names, syms[i]->name, len + 1);
3437 names += len + 1;
3438 /* Have udata.p point back to the original symbol this
3439 synthetic symbol was derived from. */
3440 s->udata.p = syms[i];
3441 s++;
3442 }
3443 }
3444 }
3445 else
3446 {
3447 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3448 bfd_byte *contents = NULL;
3449 size_t size;
3450 long plt_count = 0;
3451 bfd_vma glink_vma = 0, resolv_vma = 0;
3452 asection *dynamic, *glink = NULL, *relplt = NULL;
3453 arelent *p;
3454
3455 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3456 {
3457 free_contents_and_exit_err:
3458 count = -1;
3459 free_contents_and_exit:
3460 if (contents)
3461 free (contents);
3462 goto done;
3463 }
3464
3465 size = 0;
3466 for (i = secsymend; i < opdsymend; ++i)
3467 {
3468 bfd_vma ent;
3469
3470 /* Ignore bogus symbols. */
3471 if (syms[i]->value > opd->size - 8)
3472 continue;
3473
3474 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3475 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3476 {
3477 ++count;
3478 size += sizeof (asymbol);
3479 size += strlen (syms[i]->name) + 2;
3480 }
3481 }
3482
3483 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3484 if (dyn_count != 0
3485 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3486 {
3487 bfd_byte *dynbuf, *extdyn, *extdynend;
3488 size_t extdynsize;
3489 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3490
3491 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3492 goto free_contents_and_exit_err;
3493
3494 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3495 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3496
3497 extdyn = dynbuf;
3498 extdynend = extdyn + dynamic->size;
3499 for (; extdyn < extdynend; extdyn += extdynsize)
3500 {
3501 Elf_Internal_Dyn dyn;
3502 (*swap_dyn_in) (abfd, extdyn, &dyn);
3503
3504 if (dyn.d_tag == DT_NULL)
3505 break;
3506
3507 if (dyn.d_tag == DT_PPC64_GLINK)
3508 {
3509 /* The first glink stub starts at offset 32; see
3510 comment in ppc64_elf_finish_dynamic_sections. */
3511 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3512 /* The .glink section usually does not survive the final
3513 link; search for the section (usually .text) where the
3514 glink stubs now reside. */
3515 glink = bfd_sections_find_if (abfd, section_covers_vma,
3516 &glink_vma);
3517 break;
3518 }
3519 }
3520
3521 free (dynbuf);
3522 }
3523
3524 if (glink != NULL)
3525 {
3526 /* Determine __glink trampoline by reading the relative branch
3527 from the first glink stub. */
3528 bfd_byte buf[4];
3529 unsigned int off = 0;
3530
3531 while (bfd_get_section_contents (abfd, glink, buf,
3532 glink_vma + off - glink->vma, 4))
3533 {
3534 unsigned int insn = bfd_get_32 (abfd, buf);
3535 insn ^= B_DOT;
3536 if ((insn & ~0x3fffffc) == 0)
3537 {
3538 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3539 break;
3540 }
3541 off += 4;
3542 if (off > 4)
3543 break;
3544 }
3545
3546 if (resolv_vma)
3547 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3548
3549 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3550 if (relplt != NULL)
3551 {
3552 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3553 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3554 goto free_contents_and_exit_err;
3555
3556 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3557 size += plt_count * sizeof (asymbol);
3558
3559 p = relplt->relocation;
3560 for (i = 0; i < plt_count; i++, p++)
3561 {
3562 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3563 if (p->addend != 0)
3564 size += sizeof ("+0x") - 1 + 16;
3565 }
3566 }
3567 }
3568
3569 if (size == 0)
3570 goto free_contents_and_exit;
3571 s = *ret = bfd_malloc (size);
3572 if (s == NULL)
3573 goto free_contents_and_exit_err;
3574
3575 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3576
3577 for (i = secsymend; i < opdsymend; ++i)
3578 {
3579 bfd_vma ent;
3580
3581 if (syms[i]->value > opd->size - 8)
3582 continue;
3583
3584 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3585 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3586 {
3587 long lo, hi;
3588 size_t len;
3589 asection *sec = abfd->sections;
3590
3591 *s = *syms[i];
3592 lo = codesecsym;
3593 hi = codesecsymend;
3594 while (lo < hi)
3595 {
3596 long mid = (lo + hi) >> 1;
3597 if (syms[mid]->section->vma < ent)
3598 lo = mid + 1;
3599 else if (syms[mid]->section->vma > ent)
3600 hi = mid;
3601 else
3602 {
3603 sec = syms[mid]->section;
3604 break;
3605 }
3606 }
3607
3608 if (lo >= hi && lo > codesecsym)
3609 sec = syms[lo - 1]->section;
3610
3611 for (; sec != NULL; sec = sec->next)
3612 {
3613 if (sec->vma > ent)
3614 break;
3615 /* SEC_LOAD may not be set if SEC is from a separate debug
3616 info file. */
3617 if ((sec->flags & SEC_ALLOC) == 0)
3618 break;
3619 if ((sec->flags & SEC_CODE) != 0)
3620 s->section = sec;
3621 }
3622 s->flags |= BSF_SYNTHETIC;
3623 s->value = ent - s->section->vma;
3624 s->name = names;
3625 *names++ = '.';
3626 len = strlen (syms[i]->name);
3627 memcpy (names, syms[i]->name, len + 1);
3628 names += len + 1;
3629 /* Have udata.p point back to the original symbol this
3630 synthetic symbol was derived from. */
3631 s->udata.p = syms[i];
3632 s++;
3633 }
3634 }
3635 free (contents);
3636
3637 if (glink != NULL && relplt != NULL)
3638 {
3639 if (resolv_vma)
3640 {
3641 /* Add a symbol for the main glink trampoline. */
3642 memset (s, 0, sizeof *s);
3643 s->the_bfd = abfd;
3644 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3645 s->section = glink;
3646 s->value = resolv_vma - glink->vma;
3647 s->name = names;
3648 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3649 names += sizeof ("__glink_PLTresolve");
3650 s++;
3651 count++;
3652 }
3653
3654 /* FIXME: It would be very much nicer to put sym@plt on the
3655 stub rather than on the glink branch table entry. The
3656 objdump disassembler would then use a sensible symbol
3657 name on plt calls. The difficulty in doing so is
3658 a) finding the stubs, and,
3659 b) matching stubs against plt entries, and,
3660 c) there can be multiple stubs for a given plt entry.
3661
3662 Solving (a) could be done by code scanning, but older
3663 ppc64 binaries used different stubs to current code.
3664 (b) is the tricky one since you need to known the toc
3665 pointer for at least one function that uses a pic stub to
3666 be able to calculate the plt address referenced.
3667 (c) means gdb would need to set multiple breakpoints (or
3668 find the glink branch itself) when setting breakpoints
3669 for pending shared library loads. */
3670 p = relplt->relocation;
3671 for (i = 0; i < plt_count; i++, p++)
3672 {
3673 size_t len;
3674
3675 *s = **p->sym_ptr_ptr;
3676 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3677 we are defining a symbol, ensure one of them is set. */
3678 if ((s->flags & BSF_LOCAL) == 0)
3679 s->flags |= BSF_GLOBAL;
3680 s->flags |= BSF_SYNTHETIC;
3681 s->section = glink;
3682 s->value = glink_vma - glink->vma;
3683 s->name = names;
3684 s->udata.p = NULL;
3685 len = strlen ((*p->sym_ptr_ptr)->name);
3686 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3687 names += len;
3688 if (p->addend != 0)
3689 {
3690 memcpy (names, "+0x", sizeof ("+0x") - 1);
3691 names += sizeof ("+0x") - 1;
3692 bfd_sprintf_vma (abfd, names, p->addend);
3693 names += strlen (names);
3694 }
3695 memcpy (names, "@plt", sizeof ("@plt"));
3696 names += sizeof ("@plt");
3697 s++;
3698 if (abi < 2)
3699 {
3700 glink_vma += 8;
3701 if (i >= 0x8000)
3702 glink_vma += 4;
3703 }
3704 else
3705 glink_vma += 4;
3706 }
3707 count += plt_count;
3708 }
3709 }
3710
3711 done:
3712 free (syms);
3713 return count;
3714 }
3715 \f
3716 /* The following functions are specific to the ELF linker, while
3717 functions above are used generally. Those named ppc64_elf_* are
3718 called by the main ELF linker code. They appear in this file more
3719 or less in the order in which they are called. eg.
3720 ppc64_elf_check_relocs is called early in the link process,
3721 ppc64_elf_finish_dynamic_sections is one of the last functions
3722 called.
3723
3724 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3725 functions have both a function code symbol and a function descriptor
3726 symbol. A call to foo in a relocatable object file looks like:
3727
3728 . .text
3729 . x:
3730 . bl .foo
3731 . nop
3732
3733 The function definition in another object file might be:
3734
3735 . .section .opd
3736 . foo: .quad .foo
3737 . .quad .TOC.@tocbase
3738 . .quad 0
3739 .
3740 . .text
3741 . .foo: blr
3742
3743 When the linker resolves the call during a static link, the branch
3744 unsurprisingly just goes to .foo and the .opd information is unused.
3745 If the function definition is in a shared library, things are a little
3746 different: The call goes via a plt call stub, the opd information gets
3747 copied to the plt, and the linker patches the nop.
3748
3749 . x:
3750 . bl .foo_stub
3751 . ld 2,40(1)
3752 .
3753 .
3754 . .foo_stub:
3755 . std 2,40(1) # in practice, the call stub
3756 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3757 . addi 11,11,Lfoo@toc@l # this is the general idea
3758 . ld 12,0(11)
3759 . ld 2,8(11)
3760 . mtctr 12
3761 . ld 11,16(11)
3762 . bctr
3763 .
3764 . .section .plt
3765 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3766
3767 The "reloc ()" notation is supposed to indicate that the linker emits
3768 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3769 copying.
3770
3771 What are the difficulties here? Well, firstly, the relocations
3772 examined by the linker in check_relocs are against the function code
3773 sym .foo, while the dynamic relocation in the plt is emitted against
3774 the function descriptor symbol, foo. Somewhere along the line, we need
3775 to carefully copy dynamic link information from one symbol to the other.
3776 Secondly, the generic part of the elf linker will make .foo a dynamic
3777 symbol as is normal for most other backends. We need foo dynamic
3778 instead, at least for an application final link. However, when
3779 creating a shared library containing foo, we need to have both symbols
3780 dynamic so that references to .foo are satisfied during the early
3781 stages of linking. Otherwise the linker might decide to pull in a
3782 definition from some other object, eg. a static library.
3783
3784 Update: As of August 2004, we support a new convention. Function
3785 calls may use the function descriptor symbol, ie. "bl foo". This
3786 behaves exactly as "bl .foo". */
3787
3788 /* Of those relocs that might be copied as dynamic relocs, this
3789 function selects those that must be copied when linking a shared
3790 library or PIE, even when the symbol is local. */
3791
3792 static int
3793 must_be_dyn_reloc (struct bfd_link_info *info,
3794 enum elf_ppc64_reloc_type r_type)
3795 {
3796 switch (r_type)
3797 {
3798 default:
3799 /* Only relative relocs can be resolved when the object load
3800 address isn't fixed. DTPREL64 is excluded because the
3801 dynamic linker needs to differentiate global dynamic from
3802 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3803 return 1;
3804
3805 case R_PPC64_REL32:
3806 case R_PPC64_REL64:
3807 case R_PPC64_REL30:
3808 return 0;
3809
3810 case R_PPC64_TPREL16:
3811 case R_PPC64_TPREL16_LO:
3812 case R_PPC64_TPREL16_HI:
3813 case R_PPC64_TPREL16_HA:
3814 case R_PPC64_TPREL16_DS:
3815 case R_PPC64_TPREL16_LO_DS:
3816 case R_PPC64_TPREL16_HIGH:
3817 case R_PPC64_TPREL16_HIGHA:
3818 case R_PPC64_TPREL16_HIGHER:
3819 case R_PPC64_TPREL16_HIGHERA:
3820 case R_PPC64_TPREL16_HIGHEST:
3821 case R_PPC64_TPREL16_HIGHESTA:
3822 case R_PPC64_TPREL64:
3823 /* These relocations are relative but in a shared library the
3824 linker doesn't know the thread pointer base. */
3825 return bfd_link_dll (info);
3826 }
3827 }
3828
3829 /* Whether an undefined weak symbol should resolve to its link-time
3830 value, even in PIC or PIE objects. */
3831 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3832 ((H)->root.type == bfd_link_hash_undefweak \
3833 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3834 || (INFO)->dynamic_undefined_weak == 0))
3835
3836 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3837 copying dynamic variables from a shared lib into an app's dynbss
3838 section, and instead use a dynamic relocation to point into the
3839 shared lib. With code that gcc generates, it's vital that this be
3840 enabled; In the PowerPC64 ABI, the address of a function is actually
3841 the address of a function descriptor, which resides in the .opd
3842 section. gcc uses the descriptor directly rather than going via the
3843 GOT as some other ABI's do, which means that initialized function
3844 pointers must reference the descriptor. Thus, a function pointer
3845 initialized to the address of a function in a shared library will
3846 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3847 redefines the function descriptor symbol to point to the copy. This
3848 presents a problem as a plt entry for that function is also
3849 initialized from the function descriptor symbol and the copy reloc
3850 may not be initialized first. */
3851 #define ELIMINATE_COPY_RELOCS 1
3852
3853 /* Section name for stubs is the associated section name plus this
3854 string. */
3855 #define STUB_SUFFIX ".stub"
3856
3857 /* Linker stubs.
3858 ppc_stub_long_branch:
3859 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3860 destination, but a 24 bit branch in a stub section will reach.
3861 . b dest
3862
3863 ppc_stub_plt_branch:
3864 Similar to the above, but a 24 bit branch in the stub section won't
3865 reach its destination.
3866 . addis %r11,%r2,xxx@toc@ha
3867 . ld %r12,xxx@toc@l(%r11)
3868 . mtctr %r12
3869 . bctr
3870
3871 ppc_stub_plt_call:
3872 Used to call a function in a shared library. If it so happens that
3873 the plt entry referenced crosses a 64k boundary, then an extra
3874 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3875 . std %r2,40(%r1)
3876 . addis %r11,%r2,xxx@toc@ha
3877 . ld %r12,xxx+0@toc@l(%r11)
3878 . mtctr %r12
3879 . ld %r2,xxx+8@toc@l(%r11)
3880 . ld %r11,xxx+16@toc@l(%r11)
3881 . bctr
3882
3883 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3884 code to adjust the value and save r2 to support multiple toc sections.
3885 A ppc_stub_long_branch with an r2 offset looks like:
3886 . std %r2,40(%r1)
3887 . addis %r2,%r2,off@ha
3888 . addi %r2,%r2,off@l
3889 . b dest
3890
3891 A ppc_stub_plt_branch with an r2 offset looks like:
3892 . std %r2,40(%r1)
3893 . addis %r11,%r2,xxx@toc@ha
3894 . ld %r12,xxx@toc@l(%r11)
3895 . addis %r2,%r2,off@ha
3896 . addi %r2,%r2,off@l
3897 . mtctr %r12
3898 . bctr
3899
3900 In cases where the "addis" instruction would add zero, the "addis" is
3901 omitted and following instructions modified slightly in some cases.
3902 */
3903
3904 enum ppc_stub_type {
3905 ppc_stub_none,
3906 ppc_stub_long_branch,
3907 ppc_stub_long_branch_r2off,
3908 ppc_stub_plt_branch,
3909 ppc_stub_plt_branch_r2off,
3910 ppc_stub_plt_call,
3911 ppc_stub_plt_call_r2save,
3912 ppc_stub_global_entry,
3913 ppc_stub_save_res
3914 };
3915
3916 /* Information on stub grouping. */
3917 struct map_stub
3918 {
3919 /* The stub section. */
3920 asection *stub_sec;
3921 /* This is the section to which stubs in the group will be attached. */
3922 asection *link_sec;
3923 /* Next group. */
3924 struct map_stub *next;
3925 /* Whether to emit a copy of register save/restore functions in this
3926 group. */
3927 int needs_save_res;
3928 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3929 or -1u if no such stub with bctrl exists. */
3930 unsigned int tls_get_addr_opt_bctrl;
3931 };
3932
3933 struct ppc_stub_hash_entry {
3934
3935 /* Base hash table entry structure. */
3936 struct bfd_hash_entry root;
3937
3938 enum ppc_stub_type stub_type;
3939
3940 /* Group information. */
3941 struct map_stub *group;
3942
3943 /* Offset within stub_sec of the beginning of this stub. */
3944 bfd_vma stub_offset;
3945
3946 /* Given the symbol's value and its section we can determine its final
3947 value when building the stubs (so the stub knows where to jump. */
3948 bfd_vma target_value;
3949 asection *target_section;
3950
3951 /* The symbol table entry, if any, that this was derived from. */
3952 struct ppc_link_hash_entry *h;
3953 struct plt_entry *plt_ent;
3954
3955 /* Symbol st_other. */
3956 unsigned char other;
3957 };
3958
3959 struct ppc_branch_hash_entry {
3960
3961 /* Base hash table entry structure. */
3962 struct bfd_hash_entry root;
3963
3964 /* Offset within branch lookup table. */
3965 unsigned int offset;
3966
3967 /* Generation marker. */
3968 unsigned int iter;
3969 };
3970
3971 /* Used to track dynamic relocations for local symbols. */
3972 struct ppc_dyn_relocs
3973 {
3974 struct ppc_dyn_relocs *next;
3975
3976 /* The input section of the reloc. */
3977 asection *sec;
3978
3979 /* Total number of relocs copied for the input section. */
3980 unsigned int count : 31;
3981
3982 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3983 unsigned int ifunc : 1;
3984 };
3985
3986 struct ppc_link_hash_entry
3987 {
3988 struct elf_link_hash_entry elf;
3989
3990 union {
3991 /* A pointer to the most recently used stub hash entry against this
3992 symbol. */
3993 struct ppc_stub_hash_entry *stub_cache;
3994
3995 /* A pointer to the next symbol starting with a '.' */
3996 struct ppc_link_hash_entry *next_dot_sym;
3997 } u;
3998
3999 /* Track dynamic relocs copied for this symbol. */
4000 struct elf_dyn_relocs *dyn_relocs;
4001
4002 /* Chain of aliases referring to a weakdef. */
4003 struct ppc_link_hash_entry *weakref;
4004
4005 /* Link between function code and descriptor symbols. */
4006 struct ppc_link_hash_entry *oh;
4007
4008 /* Flag function code and descriptor symbols. */
4009 unsigned int is_func:1;
4010 unsigned int is_func_descriptor:1;
4011 unsigned int fake:1;
4012
4013 /* Whether global opd/toc sym has been adjusted or not.
4014 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4015 should be set for all globals defined in any opd/toc section. */
4016 unsigned int adjust_done:1;
4017
4018 /* Set if this is an out-of-line register save/restore function,
4019 with non-standard calling convention. */
4020 unsigned int save_res:1;
4021
4022 /* Set if a duplicate symbol with non-zero localentry is detected,
4023 even when the duplicate symbol does not provide a definition. */
4024 unsigned int non_zero_localentry:1;
4025
4026 /* Contexts in which symbol is used in the GOT (or TOC).
4027 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4028 corresponding relocs are encountered during check_relocs.
4029 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4030 indicate the corresponding GOT entry type is not needed.
4031 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4032 a TPREL one. We use a separate flag rather than setting TPREL
4033 just for convenience in distinguishing the two cases. */
4034 #define TLS_GD 1 /* GD reloc. */
4035 #define TLS_LD 2 /* LD reloc. */
4036 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4037 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4038 #define TLS_TLS 16 /* Any TLS reloc. */
4039 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4040 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4041 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4042 unsigned char tls_mask;
4043 };
4044
4045 /* ppc64 ELF linker hash table. */
4046
4047 struct ppc_link_hash_table
4048 {
4049 struct elf_link_hash_table elf;
4050
4051 /* The stub hash table. */
4052 struct bfd_hash_table stub_hash_table;
4053
4054 /* Another hash table for plt_branch stubs. */
4055 struct bfd_hash_table branch_hash_table;
4056
4057 /* Hash table for function prologue tocsave. */
4058 htab_t tocsave_htab;
4059
4060 /* Various options and other info passed from the linker. */
4061 struct ppc64_elf_params *params;
4062
4063 /* The size of sec_info below. */
4064 unsigned int sec_info_arr_size;
4065
4066 /* Per-section array of extra section info. Done this way rather
4067 than as part of ppc64_elf_section_data so we have the info for
4068 non-ppc64 sections. */
4069 struct
4070 {
4071 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4072 bfd_vma toc_off;
4073
4074 union
4075 {
4076 /* The section group that this section belongs to. */
4077 struct map_stub *group;
4078 /* A temp section list pointer. */
4079 asection *list;
4080 } u;
4081 } *sec_info;
4082
4083 /* Linked list of groups. */
4084 struct map_stub *group;
4085
4086 /* Temp used when calculating TOC pointers. */
4087 bfd_vma toc_curr;
4088 bfd *toc_bfd;
4089 asection *toc_first_sec;
4090
4091 /* Used when adding symbols. */
4092 struct ppc_link_hash_entry *dot_syms;
4093
4094 /* Shortcuts to get to dynamic linker sections. */
4095 asection *glink;
4096 asection *sfpr;
4097 asection *brlt;
4098 asection *relbrlt;
4099 asection *glink_eh_frame;
4100
4101 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4102 struct ppc_link_hash_entry *tls_get_addr;
4103 struct ppc_link_hash_entry *tls_get_addr_fd;
4104
4105 /* The size of reliplt used by got entry relocs. */
4106 bfd_size_type got_reli_size;
4107
4108 /* Statistics. */
4109 unsigned long stub_count[ppc_stub_global_entry];
4110
4111 /* Number of stubs against global syms. */
4112 unsigned long stub_globals;
4113
4114 /* Set if we're linking code with function descriptors. */
4115 unsigned int opd_abi:1;
4116
4117 /* Support for multiple toc sections. */
4118 unsigned int do_multi_toc:1;
4119 unsigned int multi_toc_needed:1;
4120 unsigned int second_toc_pass:1;
4121 unsigned int do_toc_opt:1;
4122
4123 /* Set if tls optimization is enabled. */
4124 unsigned int do_tls_opt:1;
4125
4126 /* Set on error. */
4127 unsigned int stub_error:1;
4128
4129 /* Whether func_desc_adjust needs to be run over symbols. */
4130 unsigned int need_func_desc_adj:1;
4131
4132 /* Whether there exist local gnu indirect function resolvers,
4133 referenced by dynamic relocations. */
4134 unsigned int local_ifunc_resolver:1;
4135 unsigned int maybe_local_ifunc_resolver:1;
4136
4137 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4138 unsigned int has_plt_localentry0:1;
4139
4140 /* Incremented every time we size stubs. */
4141 unsigned int stub_iteration;
4142
4143 /* Small local sym cache. */
4144 struct sym_cache sym_cache;
4145 };
4146
4147 /* Rename some of the generic section flags to better document how they
4148 are used here. */
4149
4150 /* Nonzero if this section has TLS related relocations. */
4151 #define has_tls_reloc sec_flg0
4152
4153 /* Nonzero if this section has a call to __tls_get_addr. */
4154 #define has_tls_get_addr_call sec_flg1
4155
4156 /* Nonzero if this section has any toc or got relocs. */
4157 #define has_toc_reloc sec_flg2
4158
4159 /* Nonzero if this section has a call to another section that uses
4160 the toc or got. */
4161 #define makes_toc_func_call sec_flg3
4162
4163 /* Recursion protection when determining above flag. */
4164 #define call_check_in_progress sec_flg4
4165 #define call_check_done sec_flg5
4166
4167 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4168
4169 #define ppc_hash_table(p) \
4170 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4171 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4172
4173 #define ppc_stub_hash_lookup(table, string, create, copy) \
4174 ((struct ppc_stub_hash_entry *) \
4175 bfd_hash_lookup ((table), (string), (create), (copy)))
4176
4177 #define ppc_branch_hash_lookup(table, string, create, copy) \
4178 ((struct ppc_branch_hash_entry *) \
4179 bfd_hash_lookup ((table), (string), (create), (copy)))
4180
4181 /* Create an entry in the stub hash table. */
4182
4183 static struct bfd_hash_entry *
4184 stub_hash_newfunc (struct bfd_hash_entry *entry,
4185 struct bfd_hash_table *table,
4186 const char *string)
4187 {
4188 /* Allocate the structure if it has not already been allocated by a
4189 subclass. */
4190 if (entry == NULL)
4191 {
4192 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4193 if (entry == NULL)
4194 return entry;
4195 }
4196
4197 /* Call the allocation method of the superclass. */
4198 entry = bfd_hash_newfunc (entry, table, string);
4199 if (entry != NULL)
4200 {
4201 struct ppc_stub_hash_entry *eh;
4202
4203 /* Initialize the local fields. */
4204 eh = (struct ppc_stub_hash_entry *) entry;
4205 eh->stub_type = ppc_stub_none;
4206 eh->group = NULL;
4207 eh->stub_offset = 0;
4208 eh->target_value = 0;
4209 eh->target_section = NULL;
4210 eh->h = NULL;
4211 eh->plt_ent = NULL;
4212 eh->other = 0;
4213 }
4214
4215 return entry;
4216 }
4217
4218 /* Create an entry in the branch hash table. */
4219
4220 static struct bfd_hash_entry *
4221 branch_hash_newfunc (struct bfd_hash_entry *entry,
4222 struct bfd_hash_table *table,
4223 const char *string)
4224 {
4225 /* Allocate the structure if it has not already been allocated by a
4226 subclass. */
4227 if (entry == NULL)
4228 {
4229 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4230 if (entry == NULL)
4231 return entry;
4232 }
4233
4234 /* Call the allocation method of the superclass. */
4235 entry = bfd_hash_newfunc (entry, table, string);
4236 if (entry != NULL)
4237 {
4238 struct ppc_branch_hash_entry *eh;
4239
4240 /* Initialize the local fields. */
4241 eh = (struct ppc_branch_hash_entry *) entry;
4242 eh->offset = 0;
4243 eh->iter = 0;
4244 }
4245
4246 return entry;
4247 }
4248
4249 /* Create an entry in a ppc64 ELF linker hash table. */
4250
4251 static struct bfd_hash_entry *
4252 link_hash_newfunc (struct bfd_hash_entry *entry,
4253 struct bfd_hash_table *table,
4254 const char *string)
4255 {
4256 /* Allocate the structure if it has not already been allocated by a
4257 subclass. */
4258 if (entry == NULL)
4259 {
4260 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4261 if (entry == NULL)
4262 return entry;
4263 }
4264
4265 /* Call the allocation method of the superclass. */
4266 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4267 if (entry != NULL)
4268 {
4269 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4270
4271 memset (&eh->u.stub_cache, 0,
4272 (sizeof (struct ppc_link_hash_entry)
4273 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4274
4275 /* When making function calls, old ABI code references function entry
4276 points (dot symbols), while new ABI code references the function
4277 descriptor symbol. We need to make any combination of reference and
4278 definition work together, without breaking archive linking.
4279
4280 For a defined function "foo" and an undefined call to "bar":
4281 An old object defines "foo" and ".foo", references ".bar" (possibly
4282 "bar" too).
4283 A new object defines "foo" and references "bar".
4284
4285 A new object thus has no problem with its undefined symbols being
4286 satisfied by definitions in an old object. On the other hand, the
4287 old object won't have ".bar" satisfied by a new object.
4288
4289 Keep a list of newly added dot-symbols. */
4290
4291 if (string[0] == '.')
4292 {
4293 struct ppc_link_hash_table *htab;
4294
4295 htab = (struct ppc_link_hash_table *) table;
4296 eh->u.next_dot_sym = htab->dot_syms;
4297 htab->dot_syms = eh;
4298 }
4299 }
4300
4301 return entry;
4302 }
4303
4304 struct tocsave_entry {
4305 asection *sec;
4306 bfd_vma offset;
4307 };
4308
4309 static hashval_t
4310 tocsave_htab_hash (const void *p)
4311 {
4312 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4313 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4314 }
4315
4316 static int
4317 tocsave_htab_eq (const void *p1, const void *p2)
4318 {
4319 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4320 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4321 return e1->sec == e2->sec && e1->offset == e2->offset;
4322 }
4323
4324 /* Destroy a ppc64 ELF linker hash table. */
4325
4326 static void
4327 ppc64_elf_link_hash_table_free (bfd *obfd)
4328 {
4329 struct ppc_link_hash_table *htab;
4330
4331 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4332 if (htab->tocsave_htab)
4333 htab_delete (htab->tocsave_htab);
4334 bfd_hash_table_free (&htab->branch_hash_table);
4335 bfd_hash_table_free (&htab->stub_hash_table);
4336 _bfd_elf_link_hash_table_free (obfd);
4337 }
4338
4339 /* Create a ppc64 ELF linker hash table. */
4340
4341 static struct bfd_link_hash_table *
4342 ppc64_elf_link_hash_table_create (bfd *abfd)
4343 {
4344 struct ppc_link_hash_table *htab;
4345 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4346
4347 htab = bfd_zmalloc (amt);
4348 if (htab == NULL)
4349 return NULL;
4350
4351 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4352 sizeof (struct ppc_link_hash_entry),
4353 PPC64_ELF_DATA))
4354 {
4355 free (htab);
4356 return NULL;
4357 }
4358
4359 /* Init the stub hash table too. */
4360 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4361 sizeof (struct ppc_stub_hash_entry)))
4362 {
4363 _bfd_elf_link_hash_table_free (abfd);
4364 return NULL;
4365 }
4366
4367 /* And the branch hash table. */
4368 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4369 sizeof (struct ppc_branch_hash_entry)))
4370 {
4371 bfd_hash_table_free (&htab->stub_hash_table);
4372 _bfd_elf_link_hash_table_free (abfd);
4373 return NULL;
4374 }
4375
4376 htab->tocsave_htab = htab_try_create (1024,
4377 tocsave_htab_hash,
4378 tocsave_htab_eq,
4379 NULL);
4380 if (htab->tocsave_htab == NULL)
4381 {
4382 ppc64_elf_link_hash_table_free (abfd);
4383 return NULL;
4384 }
4385 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4386
4387 /* Initializing two fields of the union is just cosmetic. We really
4388 only care about glist, but when compiled on a 32-bit host the
4389 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4390 debugger inspection of these fields look nicer. */
4391 htab->elf.init_got_refcount.refcount = 0;
4392 htab->elf.init_got_refcount.glist = NULL;
4393 htab->elf.init_plt_refcount.refcount = 0;
4394 htab->elf.init_plt_refcount.glist = NULL;
4395 htab->elf.init_got_offset.offset = 0;
4396 htab->elf.init_got_offset.glist = NULL;
4397 htab->elf.init_plt_offset.offset = 0;
4398 htab->elf.init_plt_offset.glist = NULL;
4399
4400 return &htab->elf.root;
4401 }
4402
4403 /* Create sections for linker generated code. */
4404
4405 static bfd_boolean
4406 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4407 {
4408 struct ppc_link_hash_table *htab;
4409 flagword flags;
4410
4411 htab = ppc_hash_table (info);
4412
4413 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4414 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4415 if (htab->params->save_restore_funcs)
4416 {
4417 /* Create .sfpr for code to save and restore fp regs. */
4418 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4419 flags);
4420 if (htab->sfpr == NULL
4421 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4422 return FALSE;
4423 }
4424
4425 if (bfd_link_relocatable (info))
4426 return TRUE;
4427
4428 /* Create .glink for lazy dynamic linking support. */
4429 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4430 flags);
4431 if (htab->glink == NULL
4432 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4433 return FALSE;
4434
4435 if (!info->no_ld_generated_unwind_info)
4436 {
4437 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4438 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4439 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4440 ".eh_frame",
4441 flags);
4442 if (htab->glink_eh_frame == NULL
4443 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4444 return FALSE;
4445 }
4446
4447 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4448 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4449 if (htab->elf.iplt == NULL
4450 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4451 return FALSE;
4452
4453 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4454 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4455 htab->elf.irelplt
4456 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4457 if (htab->elf.irelplt == NULL
4458 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4459 return FALSE;
4460
4461 /* Create branch lookup table for plt_branch stubs. */
4462 flags = (SEC_ALLOC | SEC_LOAD
4463 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4464 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4465 flags);
4466 if (htab->brlt == NULL
4467 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4468 return FALSE;
4469
4470 if (!bfd_link_pic (info))
4471 return TRUE;
4472
4473 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4474 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4475 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4476 ".rela.branch_lt",
4477 flags);
4478 if (htab->relbrlt == NULL
4479 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4480 return FALSE;
4481
4482 return TRUE;
4483 }
4484
4485 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4486
4487 bfd_boolean
4488 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4489 struct ppc64_elf_params *params)
4490 {
4491 struct ppc_link_hash_table *htab;
4492
4493 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4494
4495 /* Always hook our dynamic sections into the first bfd, which is the
4496 linker created stub bfd. This ensures that the GOT header is at
4497 the start of the output TOC section. */
4498 htab = ppc_hash_table (info);
4499 htab->elf.dynobj = params->stub_bfd;
4500 htab->params = params;
4501
4502 return create_linkage_sections (htab->elf.dynobj, info);
4503 }
4504
4505 /* Build a name for an entry in the stub hash table. */
4506
4507 static char *
4508 ppc_stub_name (const asection *input_section,
4509 const asection *sym_sec,
4510 const struct ppc_link_hash_entry *h,
4511 const Elf_Internal_Rela *rel)
4512 {
4513 char *stub_name;
4514 ssize_t len;
4515
4516 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4517 offsets from a sym as a branch target? In fact, we could
4518 probably assume the addend is always zero. */
4519 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4520
4521 if (h)
4522 {
4523 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4524 stub_name = bfd_malloc (len);
4525 if (stub_name == NULL)
4526 return stub_name;
4527
4528 len = sprintf (stub_name, "%08x.%s+%x",
4529 input_section->id & 0xffffffff,
4530 h->elf.root.root.string,
4531 (int) rel->r_addend & 0xffffffff);
4532 }
4533 else
4534 {
4535 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4536 stub_name = bfd_malloc (len);
4537 if (stub_name == NULL)
4538 return stub_name;
4539
4540 len = sprintf (stub_name, "%08x.%x:%x+%x",
4541 input_section->id & 0xffffffff,
4542 sym_sec->id & 0xffffffff,
4543 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4544 (int) rel->r_addend & 0xffffffff);
4545 }
4546 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4547 stub_name[len - 2] = 0;
4548 return stub_name;
4549 }
4550
4551 /* Look up an entry in the stub hash. Stub entries are cached because
4552 creating the stub name takes a bit of time. */
4553
4554 static struct ppc_stub_hash_entry *
4555 ppc_get_stub_entry (const asection *input_section,
4556 const asection *sym_sec,
4557 struct ppc_link_hash_entry *h,
4558 const Elf_Internal_Rela *rel,
4559 struct ppc_link_hash_table *htab)
4560 {
4561 struct ppc_stub_hash_entry *stub_entry;
4562 struct map_stub *group;
4563
4564 /* If this input section is part of a group of sections sharing one
4565 stub section, then use the id of the first section in the group.
4566 Stub names need to include a section id, as there may well be
4567 more than one stub used to reach say, printf, and we need to
4568 distinguish between them. */
4569 group = htab->sec_info[input_section->id].u.group;
4570 if (group == NULL)
4571 return NULL;
4572
4573 if (h != NULL && h->u.stub_cache != NULL
4574 && h->u.stub_cache->h == h
4575 && h->u.stub_cache->group == group)
4576 {
4577 stub_entry = h->u.stub_cache;
4578 }
4579 else
4580 {
4581 char *stub_name;
4582
4583 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4584 if (stub_name == NULL)
4585 return NULL;
4586
4587 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4588 stub_name, FALSE, FALSE);
4589 if (h != NULL)
4590 h->u.stub_cache = stub_entry;
4591
4592 free (stub_name);
4593 }
4594
4595 return stub_entry;
4596 }
4597
4598 /* Add a new stub entry to the stub hash. Not all fields of the new
4599 stub entry are initialised. */
4600
4601 static struct ppc_stub_hash_entry *
4602 ppc_add_stub (const char *stub_name,
4603 asection *section,
4604 struct bfd_link_info *info)
4605 {
4606 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4607 struct map_stub *group;
4608 asection *link_sec;
4609 asection *stub_sec;
4610 struct ppc_stub_hash_entry *stub_entry;
4611
4612 group = htab->sec_info[section->id].u.group;
4613 link_sec = group->link_sec;
4614 stub_sec = group->stub_sec;
4615 if (stub_sec == NULL)
4616 {
4617 size_t namelen;
4618 bfd_size_type len;
4619 char *s_name;
4620
4621 namelen = strlen (link_sec->name);
4622 len = namelen + sizeof (STUB_SUFFIX);
4623 s_name = bfd_alloc (htab->params->stub_bfd, len);
4624 if (s_name == NULL)
4625 return NULL;
4626
4627 memcpy (s_name, link_sec->name, namelen);
4628 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4629 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4630 if (stub_sec == NULL)
4631 return NULL;
4632 group->stub_sec = stub_sec;
4633 }
4634
4635 /* Enter this entry into the linker stub hash table. */
4636 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4637 TRUE, FALSE);
4638 if (stub_entry == NULL)
4639 {
4640 /* xgettext:c-format */
4641 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4642 section->owner, stub_name);
4643 return NULL;
4644 }
4645
4646 stub_entry->group = group;
4647 stub_entry->stub_offset = 0;
4648 return stub_entry;
4649 }
4650
4651 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4652 not already done. */
4653
4654 static bfd_boolean
4655 create_got_section (bfd *abfd, struct bfd_link_info *info)
4656 {
4657 asection *got, *relgot;
4658 flagword flags;
4659 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4660
4661 if (!is_ppc64_elf (abfd))
4662 return FALSE;
4663 if (htab == NULL)
4664 return FALSE;
4665
4666 if (!htab->elf.sgot
4667 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4668 return FALSE;
4669
4670 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4671 | SEC_LINKER_CREATED);
4672
4673 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4674 if (!got
4675 || !bfd_set_section_alignment (abfd, got, 3))
4676 return FALSE;
4677
4678 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4679 flags | SEC_READONLY);
4680 if (!relgot
4681 || ! bfd_set_section_alignment (abfd, relgot, 3))
4682 return FALSE;
4683
4684 ppc64_elf_tdata (abfd)->got = got;
4685 ppc64_elf_tdata (abfd)->relgot = relgot;
4686 return TRUE;
4687 }
4688
4689 /* Follow indirect and warning symbol links. */
4690
4691 static inline struct bfd_link_hash_entry *
4692 follow_link (struct bfd_link_hash_entry *h)
4693 {
4694 while (h->type == bfd_link_hash_indirect
4695 || h->type == bfd_link_hash_warning)
4696 h = h->u.i.link;
4697 return h;
4698 }
4699
4700 static inline struct elf_link_hash_entry *
4701 elf_follow_link (struct elf_link_hash_entry *h)
4702 {
4703 return (struct elf_link_hash_entry *) follow_link (&h->root);
4704 }
4705
4706 static inline struct ppc_link_hash_entry *
4707 ppc_follow_link (struct ppc_link_hash_entry *h)
4708 {
4709 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4710 }
4711
4712 /* Merge PLT info on FROM with that on TO. */
4713
4714 static void
4715 move_plt_plist (struct ppc_link_hash_entry *from,
4716 struct ppc_link_hash_entry *to)
4717 {
4718 if (from->elf.plt.plist != NULL)
4719 {
4720 if (to->elf.plt.plist != NULL)
4721 {
4722 struct plt_entry **entp;
4723 struct plt_entry *ent;
4724
4725 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4726 {
4727 struct plt_entry *dent;
4728
4729 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4730 if (dent->addend == ent->addend)
4731 {
4732 dent->plt.refcount += ent->plt.refcount;
4733 *entp = ent->next;
4734 break;
4735 }
4736 if (dent == NULL)
4737 entp = &ent->next;
4738 }
4739 *entp = to->elf.plt.plist;
4740 }
4741
4742 to->elf.plt.plist = from->elf.plt.plist;
4743 from->elf.plt.plist = NULL;
4744 }
4745 }
4746
4747 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4748
4749 static void
4750 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4751 struct elf_link_hash_entry *dir,
4752 struct elf_link_hash_entry *ind)
4753 {
4754 struct ppc_link_hash_entry *edir, *eind;
4755
4756 edir = (struct ppc_link_hash_entry *) dir;
4757 eind = (struct ppc_link_hash_entry *) ind;
4758
4759 edir->is_func |= eind->is_func;
4760 edir->is_func_descriptor |= eind->is_func_descriptor;
4761 edir->tls_mask |= eind->tls_mask;
4762 if (eind->oh != NULL)
4763 edir->oh = ppc_follow_link (eind->oh);
4764
4765 /* If called to transfer flags for a weakdef during processing
4766 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4767 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4768 if (!(ELIMINATE_COPY_RELOCS
4769 && eind->elf.root.type != bfd_link_hash_indirect
4770 && edir->elf.dynamic_adjusted))
4771 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4772
4773 if (edir->elf.versioned != versioned_hidden)
4774 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4775 edir->elf.ref_regular |= eind->elf.ref_regular;
4776 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4777 edir->elf.needs_plt |= eind->elf.needs_plt;
4778 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4779
4780 /* If we were called to copy over info for a weak sym, don't copy
4781 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4782 in order to simplify readonly_dynrelocs and save a field in the
4783 symbol hash entry, but that means dyn_relocs can't be used in any
4784 tests about a specific symbol, or affect other symbol flags which
4785 are then tested.
4786 Chain weakdefs so we can get from the weakdef back to an alias.
4787 The list is circular so that we don't need to use u.weakdef as
4788 well as this list to look at all aliases. */
4789 if (eind->elf.root.type != bfd_link_hash_indirect)
4790 {
4791 struct ppc_link_hash_entry *cur, *add, *next;
4792
4793 add = eind;
4794 do
4795 {
4796 cur = edir->weakref;
4797 if (cur != NULL)
4798 {
4799 do
4800 {
4801 /* We can be called twice for the same symbols.
4802 Don't make multiple loops. */
4803 if (cur == add)
4804 return;
4805 cur = cur->weakref;
4806 } while (cur != edir);
4807 }
4808 next = add->weakref;
4809 if (cur != add)
4810 {
4811 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4812 edir->weakref = add;
4813 }
4814 add = next;
4815 } while (add != NULL && add != eind);
4816 return;
4817 }
4818
4819 /* Copy over any dynamic relocs we may have on the indirect sym. */
4820 if (eind->dyn_relocs != NULL)
4821 {
4822 if (edir->dyn_relocs != NULL)
4823 {
4824 struct elf_dyn_relocs **pp;
4825 struct elf_dyn_relocs *p;
4826
4827 /* Add reloc counts against the indirect sym to the direct sym
4828 list. Merge any entries against the same section. */
4829 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4830 {
4831 struct elf_dyn_relocs *q;
4832
4833 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4834 if (q->sec == p->sec)
4835 {
4836 q->pc_count += p->pc_count;
4837 q->count += p->count;
4838 *pp = p->next;
4839 break;
4840 }
4841 if (q == NULL)
4842 pp = &p->next;
4843 }
4844 *pp = edir->dyn_relocs;
4845 }
4846
4847 edir->dyn_relocs = eind->dyn_relocs;
4848 eind->dyn_relocs = NULL;
4849 }
4850
4851 /* Copy over got entries that we may have already seen to the
4852 symbol which just became indirect. */
4853 if (eind->elf.got.glist != NULL)
4854 {
4855 if (edir->elf.got.glist != NULL)
4856 {
4857 struct got_entry **entp;
4858 struct got_entry *ent;
4859
4860 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4861 {
4862 struct got_entry *dent;
4863
4864 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4865 if (dent->addend == ent->addend
4866 && dent->owner == ent->owner
4867 && dent->tls_type == ent->tls_type)
4868 {
4869 dent->got.refcount += ent->got.refcount;
4870 *entp = ent->next;
4871 break;
4872 }
4873 if (dent == NULL)
4874 entp = &ent->next;
4875 }
4876 *entp = edir->elf.got.glist;
4877 }
4878
4879 edir->elf.got.glist = eind->elf.got.glist;
4880 eind->elf.got.glist = NULL;
4881 }
4882
4883 /* And plt entries. */
4884 move_plt_plist (eind, edir);
4885
4886 if (eind->elf.dynindx != -1)
4887 {
4888 if (edir->elf.dynindx != -1)
4889 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4890 edir->elf.dynstr_index);
4891 edir->elf.dynindx = eind->elf.dynindx;
4892 edir->elf.dynstr_index = eind->elf.dynstr_index;
4893 eind->elf.dynindx = -1;
4894 eind->elf.dynstr_index = 0;
4895 }
4896 }
4897
4898 /* Find the function descriptor hash entry from the given function code
4899 hash entry FH. Link the entries via their OH fields. */
4900
4901 static struct ppc_link_hash_entry *
4902 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4903 {
4904 struct ppc_link_hash_entry *fdh = fh->oh;
4905
4906 if (fdh == NULL)
4907 {
4908 const char *fd_name = fh->elf.root.root.string + 1;
4909
4910 fdh = (struct ppc_link_hash_entry *)
4911 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4912 if (fdh == NULL)
4913 return fdh;
4914
4915 fdh->is_func_descriptor = 1;
4916 fdh->oh = fh;
4917 fh->is_func = 1;
4918 fh->oh = fdh;
4919 }
4920
4921 fdh = ppc_follow_link (fdh);
4922 fdh->is_func_descriptor = 1;
4923 fdh->oh = fh;
4924 return fdh;
4925 }
4926
4927 /* Make a fake function descriptor sym for the undefined code sym FH. */
4928
4929 static struct ppc_link_hash_entry *
4930 make_fdh (struct bfd_link_info *info,
4931 struct ppc_link_hash_entry *fh)
4932 {
4933 bfd *abfd = fh->elf.root.u.undef.abfd;
4934 struct bfd_link_hash_entry *bh = NULL;
4935 struct ppc_link_hash_entry *fdh;
4936 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4937 ? BSF_WEAK
4938 : BSF_GLOBAL);
4939
4940 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4941 fh->elf.root.root.string + 1,
4942 flags, bfd_und_section_ptr, 0,
4943 NULL, FALSE, FALSE, &bh))
4944 return NULL;
4945
4946 fdh = (struct ppc_link_hash_entry *) bh;
4947 fdh->elf.non_elf = 0;
4948 fdh->fake = 1;
4949 fdh->is_func_descriptor = 1;
4950 fdh->oh = fh;
4951 fh->is_func = 1;
4952 fh->oh = fdh;
4953 return fdh;
4954 }
4955
4956 /* Fix function descriptor symbols defined in .opd sections to be
4957 function type. */
4958
4959 static bfd_boolean
4960 ppc64_elf_add_symbol_hook (bfd *ibfd,
4961 struct bfd_link_info *info,
4962 Elf_Internal_Sym *isym,
4963 const char **name,
4964 flagword *flags ATTRIBUTE_UNUSED,
4965 asection **sec,
4966 bfd_vma *value)
4967 {
4968 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4969 && (ibfd->flags & DYNAMIC) == 0
4970 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4971 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4972
4973 if (*sec != NULL
4974 && strcmp ((*sec)->name, ".opd") == 0)
4975 {
4976 asection *code_sec;
4977
4978 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4979 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4980 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4981
4982 /* If the symbol is a function defined in .opd, and the function
4983 code is in a discarded group, let it appear to be undefined. */
4984 if (!bfd_link_relocatable (info)
4985 && (*sec)->reloc_count != 0
4986 && opd_entry_value (*sec, *value, &code_sec, NULL,
4987 FALSE) != (bfd_vma) -1
4988 && discarded_section (code_sec))
4989 {
4990 *sec = bfd_und_section_ptr;
4991 isym->st_shndx = SHN_UNDEF;
4992 }
4993 }
4994 else if (*sec != NULL
4995 && strcmp ((*sec)->name, ".toc") == 0
4996 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4997 {
4998 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4999 if (htab != NULL)
5000 htab->params->object_in_toc = 1;
5001 }
5002
5003 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5004 {
5005 if (abiversion (ibfd) == 0)
5006 set_abiversion (ibfd, 2);
5007 else if (abiversion (ibfd) == 1)
5008 {
5009 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5010 " for ABI version 1\n"), name);
5011 bfd_set_error (bfd_error_bad_value);
5012 return FALSE;
5013 }
5014 }
5015
5016 return TRUE;
5017 }
5018
5019 /* Merge non-visibility st_other attributes: local entry point. */
5020
5021 static void
5022 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5023 const Elf_Internal_Sym *isym,
5024 bfd_boolean definition,
5025 bfd_boolean dynamic)
5026 {
5027 if (definition && (!dynamic || !h->def_regular))
5028 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5029 | ELF_ST_VISIBILITY (h->other));
5030 }
5031
5032 /* Hook called on merging a symbol. We use this to clear "fake" since
5033 we now have a real symbol. */
5034
5035 static bfd_boolean
5036 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5037 const Elf_Internal_Sym *isym,
5038 asection **psec ATTRIBUTE_UNUSED,
5039 bfd_boolean newdef ATTRIBUTE_UNUSED,
5040 bfd_boolean olddef ATTRIBUTE_UNUSED,
5041 bfd *oldbfd ATTRIBUTE_UNUSED,
5042 const asection *oldsec ATTRIBUTE_UNUSED)
5043 {
5044 ((struct ppc_link_hash_entry *) h)->fake = 0;
5045 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5046 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5047 return TRUE;
5048 }
5049
5050 /* This function makes an old ABI object reference to ".bar" cause the
5051 inclusion of a new ABI object archive that defines "bar".
5052 NAME is a symbol defined in an archive. Return a symbol in the hash
5053 table that might be satisfied by the archive symbols. */
5054
5055 static struct elf_link_hash_entry *
5056 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5057 struct bfd_link_info *info,
5058 const char *name)
5059 {
5060 struct elf_link_hash_entry *h;
5061 char *dot_name;
5062 size_t len;
5063
5064 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5065 if (h != NULL
5066 /* Don't return this sym if it is a fake function descriptor
5067 created by add_symbol_adjust. */
5068 && !((struct ppc_link_hash_entry *) h)->fake)
5069 return h;
5070
5071 if (name[0] == '.')
5072 return h;
5073
5074 len = strlen (name);
5075 dot_name = bfd_alloc (abfd, len + 2);
5076 if (dot_name == NULL)
5077 return (struct elf_link_hash_entry *) 0 - 1;
5078 dot_name[0] = '.';
5079 memcpy (dot_name + 1, name, len + 1);
5080 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5081 bfd_release (abfd, dot_name);
5082 return h;
5083 }
5084
5085 /* This function satisfies all old ABI object references to ".bar" if a
5086 new ABI object defines "bar". Well, at least, undefined dot symbols
5087 are made weak. This stops later archive searches from including an
5088 object if we already have a function descriptor definition. It also
5089 prevents the linker complaining about undefined symbols.
5090 We also check and correct mismatched symbol visibility here. The
5091 most restrictive visibility of the function descriptor and the
5092 function entry symbol is used. */
5093
5094 static bfd_boolean
5095 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5096 {
5097 struct ppc_link_hash_table *htab;
5098 struct ppc_link_hash_entry *fdh;
5099
5100 if (eh->elf.root.type == bfd_link_hash_warning)
5101 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5102
5103 if (eh->elf.root.type == bfd_link_hash_indirect)
5104 return TRUE;
5105
5106 if (eh->elf.root.root.string[0] != '.')
5107 abort ();
5108
5109 htab = ppc_hash_table (info);
5110 if (htab == NULL)
5111 return FALSE;
5112
5113 fdh = lookup_fdh (eh, htab);
5114 if (fdh == NULL
5115 && !bfd_link_relocatable (info)
5116 && (eh->elf.root.type == bfd_link_hash_undefined
5117 || eh->elf.root.type == bfd_link_hash_undefweak)
5118 && eh->elf.ref_regular)
5119 {
5120 /* Make an undefined function descriptor sym, in order to
5121 pull in an --as-needed shared lib. Archives are handled
5122 elsewhere. */
5123 fdh = make_fdh (info, eh);
5124 if (fdh == NULL)
5125 return FALSE;
5126 }
5127
5128 if (fdh != NULL)
5129 {
5130 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5131 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5132
5133 /* Make both descriptor and entry symbol have the most
5134 constraining visibility of either symbol. */
5135 if (entry_vis < descr_vis)
5136 fdh->elf.other += entry_vis - descr_vis;
5137 else if (entry_vis > descr_vis)
5138 eh->elf.other += descr_vis - entry_vis;
5139
5140 /* Propagate reference flags from entry symbol to function
5141 descriptor symbol. */
5142 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5143 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5144 fdh->elf.ref_regular |= eh->elf.ref_regular;
5145 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5146
5147 if (!fdh->elf.forced_local
5148 && fdh->elf.dynindx == -1
5149 && fdh->elf.versioned != versioned_hidden
5150 && (bfd_link_dll (info)
5151 || fdh->elf.def_dynamic
5152 || fdh->elf.ref_dynamic)
5153 && (eh->elf.ref_regular
5154 || eh->elf.def_regular))
5155 {
5156 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5157 return FALSE;
5158 }
5159 }
5160
5161 return TRUE;
5162 }
5163
5164 /* Set up opd section info and abiversion for IBFD, and process list
5165 of dot-symbols we made in link_hash_newfunc. */
5166
5167 static bfd_boolean
5168 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5169 {
5170 struct ppc_link_hash_table *htab;
5171 struct ppc_link_hash_entry **p, *eh;
5172 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5173
5174 if (opd != NULL && opd->size != 0)
5175 {
5176 if (abiversion (ibfd) == 0)
5177 set_abiversion (ibfd, 1);
5178 else if (abiversion (ibfd) >= 2)
5179 {
5180 /* xgettext:c-format */
5181 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5182 " version %d\n"),
5183 ibfd, abiversion (ibfd));
5184 bfd_set_error (bfd_error_bad_value);
5185 return FALSE;
5186 }
5187
5188 if ((ibfd->flags & DYNAMIC) == 0
5189 && (opd->flags & SEC_RELOC) != 0
5190 && opd->reloc_count != 0
5191 && !bfd_is_abs_section (opd->output_section))
5192 {
5193 /* Garbage collection needs some extra help with .opd sections.
5194 We don't want to necessarily keep everything referenced by
5195 relocs in .opd, as that would keep all functions. Instead,
5196 if we reference an .opd symbol (a function descriptor), we
5197 want to keep the function code symbol's section. This is
5198 easy for global symbols, but for local syms we need to keep
5199 information about the associated function section. */
5200 bfd_size_type amt;
5201 asection **opd_sym_map;
5202
5203 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5204 opd_sym_map = bfd_zalloc (ibfd, amt);
5205 if (opd_sym_map == NULL)
5206 return FALSE;
5207 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5208 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5209 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5210 }
5211 }
5212
5213 if (!is_ppc64_elf (info->output_bfd))
5214 return TRUE;
5215 htab = ppc_hash_table (info);
5216 if (htab == NULL)
5217 return FALSE;
5218
5219 /* For input files without an explicit abiversion in e_flags
5220 we should have flagged any with symbol st_other bits set
5221 as ELFv1 and above flagged those with .opd as ELFv2.
5222 Set the output abiversion if not yet set, and for any input
5223 still ambiguous, take its abiversion from the output.
5224 Differences in ABI are reported later. */
5225 if (abiversion (info->output_bfd) == 0)
5226 set_abiversion (info->output_bfd, abiversion (ibfd));
5227 else if (abiversion (ibfd) == 0)
5228 set_abiversion (ibfd, abiversion (info->output_bfd));
5229
5230 p = &htab->dot_syms;
5231 while ((eh = *p) != NULL)
5232 {
5233 *p = NULL;
5234 if (&eh->elf == htab->elf.hgot)
5235 ;
5236 else if (htab->elf.hgot == NULL
5237 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5238 htab->elf.hgot = &eh->elf;
5239 else if (abiversion (ibfd) <= 1)
5240 {
5241 htab->need_func_desc_adj = 1;
5242 if (!add_symbol_adjust (eh, info))
5243 return FALSE;
5244 }
5245 p = &eh->u.next_dot_sym;
5246 }
5247 return TRUE;
5248 }
5249
5250 /* Undo hash table changes when an --as-needed input file is determined
5251 not to be needed. */
5252
5253 static bfd_boolean
5254 ppc64_elf_notice_as_needed (bfd *ibfd,
5255 struct bfd_link_info *info,
5256 enum notice_asneeded_action act)
5257 {
5258 if (act == notice_not_needed)
5259 {
5260 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5261
5262 if (htab == NULL)
5263 return FALSE;
5264
5265 htab->dot_syms = NULL;
5266 }
5267 return _bfd_elf_notice_as_needed (ibfd, info, act);
5268 }
5269
5270 /* If --just-symbols against a final linked binary, then assume we need
5271 toc adjusting stubs when calling functions defined there. */
5272
5273 static void
5274 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5275 {
5276 if ((sec->flags & SEC_CODE) != 0
5277 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5278 && is_ppc64_elf (sec->owner))
5279 {
5280 if (abiversion (sec->owner) >= 2
5281 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5282 sec->has_toc_reloc = 1;
5283 }
5284 _bfd_elf_link_just_syms (sec, info);
5285 }
5286
5287 static struct plt_entry **
5288 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5289 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5290 {
5291 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5292 struct plt_entry **local_plt;
5293 unsigned char *local_got_tls_masks;
5294
5295 if (local_got_ents == NULL)
5296 {
5297 bfd_size_type size = symtab_hdr->sh_info;
5298
5299 size *= (sizeof (*local_got_ents)
5300 + sizeof (*local_plt)
5301 + sizeof (*local_got_tls_masks));
5302 local_got_ents = bfd_zalloc (abfd, size);
5303 if (local_got_ents == NULL)
5304 return NULL;
5305 elf_local_got_ents (abfd) = local_got_ents;
5306 }
5307
5308 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5309 {
5310 struct got_entry *ent;
5311
5312 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5313 if (ent->addend == r_addend
5314 && ent->owner == abfd
5315 && ent->tls_type == tls_type)
5316 break;
5317 if (ent == NULL)
5318 {
5319 bfd_size_type amt = sizeof (*ent);
5320 ent = bfd_alloc (abfd, amt);
5321 if (ent == NULL)
5322 return FALSE;
5323 ent->next = local_got_ents[r_symndx];
5324 ent->addend = r_addend;
5325 ent->owner = abfd;
5326 ent->tls_type = tls_type;
5327 ent->is_indirect = FALSE;
5328 ent->got.refcount = 0;
5329 local_got_ents[r_symndx] = ent;
5330 }
5331 ent->got.refcount += 1;
5332 }
5333
5334 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5335 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5336 local_got_tls_masks[r_symndx] |= tls_type;
5337
5338 return local_plt + r_symndx;
5339 }
5340
5341 static bfd_boolean
5342 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5343 {
5344 struct plt_entry *ent;
5345
5346 for (ent = *plist; ent != NULL; ent = ent->next)
5347 if (ent->addend == addend)
5348 break;
5349 if (ent == NULL)
5350 {
5351 bfd_size_type amt = sizeof (*ent);
5352 ent = bfd_alloc (abfd, amt);
5353 if (ent == NULL)
5354 return FALSE;
5355 ent->next = *plist;
5356 ent->addend = addend;
5357 ent->plt.refcount = 0;
5358 *plist = ent;
5359 }
5360 ent->plt.refcount += 1;
5361 return TRUE;
5362 }
5363
5364 static bfd_boolean
5365 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5366 {
5367 return (r_type == R_PPC64_REL24
5368 || r_type == R_PPC64_REL14
5369 || r_type == R_PPC64_REL14_BRTAKEN
5370 || r_type == R_PPC64_REL14_BRNTAKEN
5371 || r_type == R_PPC64_ADDR24
5372 || r_type == R_PPC64_ADDR14
5373 || r_type == R_PPC64_ADDR14_BRTAKEN
5374 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5375 }
5376
5377 /* Look through the relocs for a section during the first phase, and
5378 calculate needed space in the global offset table, procedure
5379 linkage table, and dynamic reloc sections. */
5380
5381 static bfd_boolean
5382 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5383 asection *sec, const Elf_Internal_Rela *relocs)
5384 {
5385 struct ppc_link_hash_table *htab;
5386 Elf_Internal_Shdr *symtab_hdr;
5387 struct elf_link_hash_entry **sym_hashes;
5388 const Elf_Internal_Rela *rel;
5389 const Elf_Internal_Rela *rel_end;
5390 asection *sreloc;
5391 asection **opd_sym_map;
5392 struct elf_link_hash_entry *tga, *dottga;
5393
5394 if (bfd_link_relocatable (info))
5395 return TRUE;
5396
5397 /* Don't do anything special with non-loaded, non-alloced sections.
5398 In particular, any relocs in such sections should not affect GOT
5399 and PLT reference counting (ie. we don't allow them to create GOT
5400 or PLT entries), there's no possibility or desire to optimize TLS
5401 relocs, and there's not much point in propagating relocs to shared
5402 libs that the dynamic linker won't relocate. */
5403 if ((sec->flags & SEC_ALLOC) == 0)
5404 return TRUE;
5405
5406 BFD_ASSERT (is_ppc64_elf (abfd));
5407
5408 htab = ppc_hash_table (info);
5409 if (htab == NULL)
5410 return FALSE;
5411
5412 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5413 FALSE, FALSE, TRUE);
5414 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5415 FALSE, FALSE, TRUE);
5416 symtab_hdr = &elf_symtab_hdr (abfd);
5417 sym_hashes = elf_sym_hashes (abfd);
5418 sreloc = NULL;
5419 opd_sym_map = NULL;
5420 if (ppc64_elf_section_data (sec) != NULL
5421 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5422 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5423
5424 rel_end = relocs + sec->reloc_count;
5425 for (rel = relocs; rel < rel_end; rel++)
5426 {
5427 unsigned long r_symndx;
5428 struct elf_link_hash_entry *h;
5429 enum elf_ppc64_reloc_type r_type;
5430 int tls_type;
5431 struct _ppc64_elf_section_data *ppc64_sec;
5432 struct plt_entry **ifunc, **plt_list;
5433
5434 r_symndx = ELF64_R_SYM (rel->r_info);
5435 if (r_symndx < symtab_hdr->sh_info)
5436 h = NULL;
5437 else
5438 {
5439 struct ppc_link_hash_entry *eh;
5440
5441 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5442 h = elf_follow_link (h);
5443 eh = (struct ppc_link_hash_entry *) h;
5444
5445 /* PR15323, ref flags aren't set for references in the same
5446 object. */
5447 h->root.non_ir_ref_regular = 1;
5448 if (eh->is_func && eh->oh != NULL)
5449 eh->oh->elf.root.non_ir_ref_regular = 1;
5450
5451 if (h == htab->elf.hgot)
5452 sec->has_toc_reloc = 1;
5453 }
5454
5455 tls_type = 0;
5456 ifunc = NULL;
5457 if (h != NULL)
5458 {
5459 if (h->type == STT_GNU_IFUNC)
5460 {
5461 h->needs_plt = 1;
5462 ifunc = &h->plt.plist;
5463 }
5464 }
5465 else
5466 {
5467 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5468 abfd, r_symndx);
5469 if (isym == NULL)
5470 return FALSE;
5471
5472 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5473 {
5474 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5475 rel->r_addend, PLT_IFUNC);
5476 if (ifunc == NULL)
5477 return FALSE;
5478 }
5479 }
5480
5481 r_type = ELF64_R_TYPE (rel->r_info);
5482 switch (r_type)
5483 {
5484 case R_PPC64_TLSGD:
5485 case R_PPC64_TLSLD:
5486 /* These special tls relocs tie a call to __tls_get_addr with
5487 its parameter symbol. */
5488 break;
5489
5490 case R_PPC64_GOT_TLSLD16:
5491 case R_PPC64_GOT_TLSLD16_LO:
5492 case R_PPC64_GOT_TLSLD16_HI:
5493 case R_PPC64_GOT_TLSLD16_HA:
5494 tls_type = TLS_TLS | TLS_LD;
5495 goto dogottls;
5496
5497 case R_PPC64_GOT_TLSGD16:
5498 case R_PPC64_GOT_TLSGD16_LO:
5499 case R_PPC64_GOT_TLSGD16_HI:
5500 case R_PPC64_GOT_TLSGD16_HA:
5501 tls_type = TLS_TLS | TLS_GD;
5502 goto dogottls;
5503
5504 case R_PPC64_GOT_TPREL16_DS:
5505 case R_PPC64_GOT_TPREL16_LO_DS:
5506 case R_PPC64_GOT_TPREL16_HI:
5507 case R_PPC64_GOT_TPREL16_HA:
5508 if (bfd_link_dll (info))
5509 info->flags |= DF_STATIC_TLS;
5510 tls_type = TLS_TLS | TLS_TPREL;
5511 goto dogottls;
5512
5513 case R_PPC64_GOT_DTPREL16_DS:
5514 case R_PPC64_GOT_DTPREL16_LO_DS:
5515 case R_PPC64_GOT_DTPREL16_HI:
5516 case R_PPC64_GOT_DTPREL16_HA:
5517 tls_type = TLS_TLS | TLS_DTPREL;
5518 dogottls:
5519 sec->has_tls_reloc = 1;
5520 /* Fall through */
5521
5522 case R_PPC64_GOT16:
5523 case R_PPC64_GOT16_DS:
5524 case R_PPC64_GOT16_HA:
5525 case R_PPC64_GOT16_HI:
5526 case R_PPC64_GOT16_LO:
5527 case R_PPC64_GOT16_LO_DS:
5528 /* This symbol requires a global offset table entry. */
5529 sec->has_toc_reloc = 1;
5530 if (r_type == R_PPC64_GOT_TLSLD16
5531 || r_type == R_PPC64_GOT_TLSGD16
5532 || r_type == R_PPC64_GOT_TPREL16_DS
5533 || r_type == R_PPC64_GOT_DTPREL16_DS
5534 || r_type == R_PPC64_GOT16
5535 || r_type == R_PPC64_GOT16_DS)
5536 {
5537 htab->do_multi_toc = 1;
5538 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5539 }
5540
5541 if (ppc64_elf_tdata (abfd)->got == NULL
5542 && !create_got_section (abfd, info))
5543 return FALSE;
5544
5545 if (h != NULL)
5546 {
5547 struct ppc_link_hash_entry *eh;
5548 struct got_entry *ent;
5549
5550 eh = (struct ppc_link_hash_entry *) h;
5551 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5552 if (ent->addend == rel->r_addend
5553 && ent->owner == abfd
5554 && ent->tls_type == tls_type)
5555 break;
5556 if (ent == NULL)
5557 {
5558 bfd_size_type amt = sizeof (*ent);
5559 ent = bfd_alloc (abfd, amt);
5560 if (ent == NULL)
5561 return FALSE;
5562 ent->next = eh->elf.got.glist;
5563 ent->addend = rel->r_addend;
5564 ent->owner = abfd;
5565 ent->tls_type = tls_type;
5566 ent->is_indirect = FALSE;
5567 ent->got.refcount = 0;
5568 eh->elf.got.glist = ent;
5569 }
5570 ent->got.refcount += 1;
5571 eh->tls_mask |= tls_type;
5572 }
5573 else
5574 /* This is a global offset table entry for a local symbol. */
5575 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5576 rel->r_addend, tls_type))
5577 return FALSE;
5578
5579 /* We may also need a plt entry if the symbol turns out to be
5580 an ifunc. */
5581 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5582 {
5583 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5584 return FALSE;
5585 }
5586 break;
5587
5588 case R_PPC64_PLT16_HA:
5589 case R_PPC64_PLT16_HI:
5590 case R_PPC64_PLT16_LO:
5591 case R_PPC64_PLT32:
5592 case R_PPC64_PLT64:
5593 /* This symbol requires a procedure linkage table entry. */
5594 plt_list = ifunc;
5595 if (h != NULL)
5596 {
5597 h->needs_plt = 1;
5598 if (h->root.root.string[0] == '.'
5599 && h->root.root.string[1] != '\0')
5600 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5601 plt_list = &h->plt.plist;
5602 }
5603 if (plt_list == NULL)
5604 {
5605 /* It does not make sense to have a procedure linkage
5606 table entry for a non-ifunc local symbol. */
5607 info->callbacks->einfo
5608 /* xgettext:c-format */
5609 (_("%H: %s reloc against local symbol\n"),
5610 abfd, sec, rel->r_offset,
5611 ppc64_elf_howto_table[r_type]->name);
5612 bfd_set_error (bfd_error_bad_value);
5613 return FALSE;
5614 }
5615 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5616 return FALSE;
5617 break;
5618
5619 /* The following relocations don't need to propagate the
5620 relocation if linking a shared object since they are
5621 section relative. */
5622 case R_PPC64_SECTOFF:
5623 case R_PPC64_SECTOFF_LO:
5624 case R_PPC64_SECTOFF_HI:
5625 case R_PPC64_SECTOFF_HA:
5626 case R_PPC64_SECTOFF_DS:
5627 case R_PPC64_SECTOFF_LO_DS:
5628 case R_PPC64_DTPREL16:
5629 case R_PPC64_DTPREL16_LO:
5630 case R_PPC64_DTPREL16_HI:
5631 case R_PPC64_DTPREL16_HA:
5632 case R_PPC64_DTPREL16_DS:
5633 case R_PPC64_DTPREL16_LO_DS:
5634 case R_PPC64_DTPREL16_HIGH:
5635 case R_PPC64_DTPREL16_HIGHA:
5636 case R_PPC64_DTPREL16_HIGHER:
5637 case R_PPC64_DTPREL16_HIGHERA:
5638 case R_PPC64_DTPREL16_HIGHEST:
5639 case R_PPC64_DTPREL16_HIGHESTA:
5640 break;
5641
5642 /* Nor do these. */
5643 case R_PPC64_REL16:
5644 case R_PPC64_REL16_LO:
5645 case R_PPC64_REL16_HI:
5646 case R_PPC64_REL16_HA:
5647 case R_PPC64_REL16DX_HA:
5648 break;
5649
5650 /* Not supported as a dynamic relocation. */
5651 case R_PPC64_ADDR64_LOCAL:
5652 if (bfd_link_pic (info))
5653 {
5654 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5655 ppc_howto_init ();
5656 /* xgettext:c-format */
5657 info->callbacks->einfo (_("%H: %s reloc unsupported "
5658 "in shared libraries and PIEs.\n"),
5659 abfd, sec, rel->r_offset,
5660 ppc64_elf_howto_table[r_type]->name);
5661 bfd_set_error (bfd_error_bad_value);
5662 return FALSE;
5663 }
5664 break;
5665
5666 case R_PPC64_TOC16:
5667 case R_PPC64_TOC16_DS:
5668 htab->do_multi_toc = 1;
5669 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5670 /* Fall through. */
5671 case R_PPC64_TOC16_LO:
5672 case R_PPC64_TOC16_HI:
5673 case R_PPC64_TOC16_HA:
5674 case R_PPC64_TOC16_LO_DS:
5675 sec->has_toc_reloc = 1;
5676 break;
5677
5678 /* Marker reloc. */
5679 case R_PPC64_ENTRY:
5680 break;
5681
5682 /* This relocation describes the C++ object vtable hierarchy.
5683 Reconstruct it for later use during GC. */
5684 case R_PPC64_GNU_VTINHERIT:
5685 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5686 return FALSE;
5687 break;
5688
5689 /* This relocation describes which C++ vtable entries are actually
5690 used. Record for later use during GC. */
5691 case R_PPC64_GNU_VTENTRY:
5692 BFD_ASSERT (h != NULL);
5693 if (h != NULL
5694 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5695 return FALSE;
5696 break;
5697
5698 case R_PPC64_REL14:
5699 case R_PPC64_REL14_BRTAKEN:
5700 case R_PPC64_REL14_BRNTAKEN:
5701 {
5702 asection *dest = NULL;
5703
5704 /* Heuristic: If jumping outside our section, chances are
5705 we are going to need a stub. */
5706 if (h != NULL)
5707 {
5708 /* If the sym is weak it may be overridden later, so
5709 don't assume we know where a weak sym lives. */
5710 if (h->root.type == bfd_link_hash_defined)
5711 dest = h->root.u.def.section;
5712 }
5713 else
5714 {
5715 Elf_Internal_Sym *isym;
5716
5717 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5718 abfd, r_symndx);
5719 if (isym == NULL)
5720 return FALSE;
5721
5722 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5723 }
5724
5725 if (dest != sec)
5726 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5727 }
5728 /* Fall through. */
5729
5730 case R_PPC64_REL24:
5731 plt_list = ifunc;
5732 if (h != NULL)
5733 {
5734 h->needs_plt = 1;
5735 if (h->root.root.string[0] == '.'
5736 && h->root.root.string[1] != '\0')
5737 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5738
5739 if (h == tga || h == dottga)
5740 {
5741 sec->has_tls_reloc = 1;
5742 if (rel != relocs
5743 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5744 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5745 /* We have a new-style __tls_get_addr call with
5746 a marker reloc. */
5747 ;
5748 else
5749 /* Mark this section as having an old-style call. */
5750 sec->has_tls_get_addr_call = 1;
5751 }
5752 plt_list = &h->plt.plist;
5753 }
5754
5755 /* We may need a .plt entry if the function this reloc
5756 refers to is in a shared lib. */
5757 if (plt_list
5758 && !update_plt_info (abfd, plt_list, rel->r_addend))
5759 return FALSE;
5760 break;
5761
5762 case R_PPC64_ADDR14:
5763 case R_PPC64_ADDR14_BRNTAKEN:
5764 case R_PPC64_ADDR14_BRTAKEN:
5765 case R_PPC64_ADDR24:
5766 goto dodyn;
5767
5768 case R_PPC64_TPREL64:
5769 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5770 if (bfd_link_dll (info))
5771 info->flags |= DF_STATIC_TLS;
5772 goto dotlstoc;
5773
5774 case R_PPC64_DTPMOD64:
5775 if (rel + 1 < rel_end
5776 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5777 && rel[1].r_offset == rel->r_offset + 8)
5778 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5779 else
5780 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5781 goto dotlstoc;
5782
5783 case R_PPC64_DTPREL64:
5784 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5785 if (rel != relocs
5786 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5787 && rel[-1].r_offset == rel->r_offset - 8)
5788 /* This is the second reloc of a dtpmod, dtprel pair.
5789 Don't mark with TLS_DTPREL. */
5790 goto dodyn;
5791
5792 dotlstoc:
5793 sec->has_tls_reloc = 1;
5794 if (h != NULL)
5795 {
5796 struct ppc_link_hash_entry *eh;
5797 eh = (struct ppc_link_hash_entry *) h;
5798 eh->tls_mask |= tls_type;
5799 }
5800 else
5801 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5802 rel->r_addend, tls_type))
5803 return FALSE;
5804
5805 ppc64_sec = ppc64_elf_section_data (sec);
5806 if (ppc64_sec->sec_type != sec_toc)
5807 {
5808 bfd_size_type amt;
5809
5810 /* One extra to simplify get_tls_mask. */
5811 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5812 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5813 if (ppc64_sec->u.toc.symndx == NULL)
5814 return FALSE;
5815 amt = sec->size * sizeof (bfd_vma) / 8;
5816 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5817 if (ppc64_sec->u.toc.add == NULL)
5818 return FALSE;
5819 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5820 ppc64_sec->sec_type = sec_toc;
5821 }
5822 BFD_ASSERT (rel->r_offset % 8 == 0);
5823 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5824 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5825
5826 /* Mark the second slot of a GD or LD entry.
5827 -1 to indicate GD and -2 to indicate LD. */
5828 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5829 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5830 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5831 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5832 goto dodyn;
5833
5834 case R_PPC64_TPREL16:
5835 case R_PPC64_TPREL16_LO:
5836 case R_PPC64_TPREL16_HI:
5837 case R_PPC64_TPREL16_HA:
5838 case R_PPC64_TPREL16_DS:
5839 case R_PPC64_TPREL16_LO_DS:
5840 case R_PPC64_TPREL16_HIGH:
5841 case R_PPC64_TPREL16_HIGHA:
5842 case R_PPC64_TPREL16_HIGHER:
5843 case R_PPC64_TPREL16_HIGHERA:
5844 case R_PPC64_TPREL16_HIGHEST:
5845 case R_PPC64_TPREL16_HIGHESTA:
5846 if (bfd_link_dll (info))
5847 info->flags |= DF_STATIC_TLS;
5848 goto dodyn;
5849
5850 case R_PPC64_ADDR64:
5851 if (opd_sym_map != NULL
5852 && rel + 1 < rel_end
5853 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5854 {
5855 if (h != NULL)
5856 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5857 else
5858 {
5859 asection *s;
5860 Elf_Internal_Sym *isym;
5861
5862 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5863 abfd, r_symndx);
5864 if (isym == NULL)
5865 return FALSE;
5866
5867 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5868 if (s != NULL && s != sec)
5869 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5870 }
5871 }
5872 /* Fall through. */
5873
5874 case R_PPC64_ADDR16:
5875 case R_PPC64_ADDR16_DS:
5876 case R_PPC64_ADDR16_HA:
5877 case R_PPC64_ADDR16_HI:
5878 case R_PPC64_ADDR16_HIGH:
5879 case R_PPC64_ADDR16_HIGHA:
5880 case R_PPC64_ADDR16_HIGHER:
5881 case R_PPC64_ADDR16_HIGHERA:
5882 case R_PPC64_ADDR16_HIGHEST:
5883 case R_PPC64_ADDR16_HIGHESTA:
5884 case R_PPC64_ADDR16_LO:
5885 case R_PPC64_ADDR16_LO_DS:
5886 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5887 && rel->r_addend == 0)
5888 {
5889 /* We may need a .plt entry if this reloc refers to a
5890 function in a shared lib. */
5891 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5892 return FALSE;
5893 h->pointer_equality_needed = 1;
5894 }
5895 /* Fall through. */
5896
5897 case R_PPC64_REL30:
5898 case R_PPC64_REL32:
5899 case R_PPC64_REL64:
5900 case R_PPC64_ADDR32:
5901 case R_PPC64_UADDR16:
5902 case R_PPC64_UADDR32:
5903 case R_PPC64_UADDR64:
5904 case R_PPC64_TOC:
5905 if (h != NULL && !bfd_link_pic (info))
5906 /* We may need a copy reloc. */
5907 h->non_got_ref = 1;
5908
5909 /* Don't propagate .opd relocs. */
5910 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5911 break;
5912
5913 /* If we are creating a shared library, and this is a reloc
5914 against a global symbol, or a non PC relative reloc
5915 against a local symbol, then we need to copy the reloc
5916 into the shared library. However, if we are linking with
5917 -Bsymbolic, we do not need to copy a reloc against a
5918 global symbol which is defined in an object we are
5919 including in the link (i.e., DEF_REGULAR is set). At
5920 this point we have not seen all the input files, so it is
5921 possible that DEF_REGULAR is not set now but will be set
5922 later (it is never cleared). In case of a weak definition,
5923 DEF_REGULAR may be cleared later by a strong definition in
5924 a shared library. We account for that possibility below by
5925 storing information in the dyn_relocs field of the hash
5926 table entry. A similar situation occurs when creating
5927 shared libraries and symbol visibility changes render the
5928 symbol local.
5929
5930 If on the other hand, we are creating an executable, we
5931 may need to keep relocations for symbols satisfied by a
5932 dynamic library if we manage to avoid copy relocs for the
5933 symbol. */
5934 dodyn:
5935 if ((bfd_link_pic (info)
5936 && (must_be_dyn_reloc (info, r_type)
5937 || (h != NULL
5938 && (!SYMBOLIC_BIND (info, h)
5939 || h->root.type == bfd_link_hash_defweak
5940 || !h->def_regular))))
5941 || (ELIMINATE_COPY_RELOCS
5942 && !bfd_link_pic (info)
5943 && h != NULL
5944 && (h->root.type == bfd_link_hash_defweak
5945 || !h->def_regular))
5946 || (!bfd_link_pic (info)
5947 && ifunc != NULL))
5948 {
5949 /* We must copy these reloc types into the output file.
5950 Create a reloc section in dynobj and make room for
5951 this reloc. */
5952 if (sreloc == NULL)
5953 {
5954 sreloc = _bfd_elf_make_dynamic_reloc_section
5955 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5956
5957 if (sreloc == NULL)
5958 return FALSE;
5959 }
5960
5961 /* If this is a global symbol, we count the number of
5962 relocations we need for this symbol. */
5963 if (h != NULL)
5964 {
5965 struct elf_dyn_relocs *p;
5966 struct elf_dyn_relocs **head;
5967
5968 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5969 p = *head;
5970 if (p == NULL || p->sec != sec)
5971 {
5972 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5973 if (p == NULL)
5974 return FALSE;
5975 p->next = *head;
5976 *head = p;
5977 p->sec = sec;
5978 p->count = 0;
5979 p->pc_count = 0;
5980 }
5981 p->count += 1;
5982 if (!must_be_dyn_reloc (info, r_type))
5983 p->pc_count += 1;
5984 }
5985 else
5986 {
5987 /* Track dynamic relocs needed for local syms too.
5988 We really need local syms available to do this
5989 easily. Oh well. */
5990 struct ppc_dyn_relocs *p;
5991 struct ppc_dyn_relocs **head;
5992 bfd_boolean is_ifunc;
5993 asection *s;
5994 void *vpp;
5995 Elf_Internal_Sym *isym;
5996
5997 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5998 abfd, r_symndx);
5999 if (isym == NULL)
6000 return FALSE;
6001
6002 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6003 if (s == NULL)
6004 s = sec;
6005
6006 vpp = &elf_section_data (s)->local_dynrel;
6007 head = (struct ppc_dyn_relocs **) vpp;
6008 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6009 p = *head;
6010 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6011 p = p->next;
6012 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6013 {
6014 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6015 if (p == NULL)
6016 return FALSE;
6017 p->next = *head;
6018 *head = p;
6019 p->sec = sec;
6020 p->ifunc = is_ifunc;
6021 p->count = 0;
6022 }
6023 p->count += 1;
6024 }
6025 }
6026 break;
6027
6028 default:
6029 break;
6030 }
6031 }
6032
6033 return TRUE;
6034 }
6035
6036 /* Merge backend specific data from an object file to the output
6037 object file when linking. */
6038
6039 static bfd_boolean
6040 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6041 {
6042 bfd *obfd = info->output_bfd;
6043 unsigned long iflags, oflags;
6044
6045 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6046 return TRUE;
6047
6048 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6049 return TRUE;
6050
6051 if (!_bfd_generic_verify_endian_match (ibfd, info))
6052 return FALSE;
6053
6054 iflags = elf_elfheader (ibfd)->e_flags;
6055 oflags = elf_elfheader (obfd)->e_flags;
6056
6057 if (iflags & ~EF_PPC64_ABI)
6058 {
6059 _bfd_error_handler
6060 /* xgettext:c-format */
6061 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6062 bfd_set_error (bfd_error_bad_value);
6063 return FALSE;
6064 }
6065 else if (iflags != oflags && iflags != 0)
6066 {
6067 _bfd_error_handler
6068 /* xgettext:c-format */
6069 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6070 ibfd, iflags, oflags);
6071 bfd_set_error (bfd_error_bad_value);
6072 return FALSE;
6073 }
6074
6075 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6076
6077 /* Merge Tag_compatibility attributes and any common GNU ones. */
6078 _bfd_elf_merge_object_attributes (ibfd, info);
6079
6080 return TRUE;
6081 }
6082
6083 static bfd_boolean
6084 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6085 {
6086 /* Print normal ELF private data. */
6087 _bfd_elf_print_private_bfd_data (abfd, ptr);
6088
6089 if (elf_elfheader (abfd)->e_flags != 0)
6090 {
6091 FILE *file = ptr;
6092
6093 fprintf (file, _("private flags = 0x%lx:"),
6094 elf_elfheader (abfd)->e_flags);
6095
6096 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6097 fprintf (file, _(" [abiv%ld]"),
6098 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6099 fputc ('\n', file);
6100 }
6101
6102 return TRUE;
6103 }
6104
6105 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6106 of the code entry point, and its section, which must be in the same
6107 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6108
6109 static bfd_vma
6110 opd_entry_value (asection *opd_sec,
6111 bfd_vma offset,
6112 asection **code_sec,
6113 bfd_vma *code_off,
6114 bfd_boolean in_code_sec)
6115 {
6116 bfd *opd_bfd = opd_sec->owner;
6117 Elf_Internal_Rela *relocs;
6118 Elf_Internal_Rela *lo, *hi, *look;
6119 bfd_vma val;
6120
6121 /* No relocs implies we are linking a --just-symbols object, or looking
6122 at a final linked executable with addr2line or somesuch. */
6123 if (opd_sec->reloc_count == 0)
6124 {
6125 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6126
6127 if (contents == NULL)
6128 {
6129 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6130 return (bfd_vma) -1;
6131 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6132 }
6133
6134 /* PR 17512: file: 64b9dfbb. */
6135 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6136 return (bfd_vma) -1;
6137
6138 val = bfd_get_64 (opd_bfd, contents + offset);
6139 if (code_sec != NULL)
6140 {
6141 asection *sec, *likely = NULL;
6142
6143 if (in_code_sec)
6144 {
6145 sec = *code_sec;
6146 if (sec->vma <= val
6147 && val < sec->vma + sec->size)
6148 likely = sec;
6149 else
6150 val = -1;
6151 }
6152 else
6153 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6154 if (sec->vma <= val
6155 && (sec->flags & SEC_LOAD) != 0
6156 && (sec->flags & SEC_ALLOC) != 0)
6157 likely = sec;
6158 if (likely != NULL)
6159 {
6160 *code_sec = likely;
6161 if (code_off != NULL)
6162 *code_off = val - likely->vma;
6163 }
6164 }
6165 return val;
6166 }
6167
6168 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6169
6170 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6171 if (relocs == NULL)
6172 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6173 /* PR 17512: file: df8e1fd6. */
6174 if (relocs == NULL)
6175 return (bfd_vma) -1;
6176
6177 /* Go find the opd reloc at the sym address. */
6178 lo = relocs;
6179 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6180 val = (bfd_vma) -1;
6181 while (lo < hi)
6182 {
6183 look = lo + (hi - lo) / 2;
6184 if (look->r_offset < offset)
6185 lo = look + 1;
6186 else if (look->r_offset > offset)
6187 hi = look;
6188 else
6189 {
6190 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6191
6192 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6193 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6194 {
6195 unsigned long symndx = ELF64_R_SYM (look->r_info);
6196 asection *sec = NULL;
6197
6198 if (symndx >= symtab_hdr->sh_info
6199 && elf_sym_hashes (opd_bfd) != NULL)
6200 {
6201 struct elf_link_hash_entry **sym_hashes;
6202 struct elf_link_hash_entry *rh;
6203
6204 sym_hashes = elf_sym_hashes (opd_bfd);
6205 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6206 if (rh != NULL)
6207 {
6208 rh = elf_follow_link (rh);
6209 if (rh->root.type != bfd_link_hash_defined
6210 && rh->root.type != bfd_link_hash_defweak)
6211 break;
6212 if (rh->root.u.def.section->owner == opd_bfd)
6213 {
6214 val = rh->root.u.def.value;
6215 sec = rh->root.u.def.section;
6216 }
6217 }
6218 }
6219
6220 if (sec == NULL)
6221 {
6222 Elf_Internal_Sym *sym;
6223
6224 if (symndx < symtab_hdr->sh_info)
6225 {
6226 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6227 if (sym == NULL)
6228 {
6229 size_t symcnt = symtab_hdr->sh_info;
6230 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6231 symcnt, 0,
6232 NULL, NULL, NULL);
6233 if (sym == NULL)
6234 break;
6235 symtab_hdr->contents = (bfd_byte *) sym;
6236 }
6237 sym += symndx;
6238 }
6239 else
6240 {
6241 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6242 1, symndx,
6243 NULL, NULL, NULL);
6244 if (sym == NULL)
6245 break;
6246 }
6247 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6248 if (sec == NULL)
6249 break;
6250 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6251 val = sym->st_value;
6252 }
6253
6254 val += look->r_addend;
6255 if (code_off != NULL)
6256 *code_off = val;
6257 if (code_sec != NULL)
6258 {
6259 if (in_code_sec && *code_sec != sec)
6260 return -1;
6261 else
6262 *code_sec = sec;
6263 }
6264 if (sec->output_section != NULL)
6265 val += sec->output_section->vma + sec->output_offset;
6266 }
6267 break;
6268 }
6269 }
6270
6271 return val;
6272 }
6273
6274 /* If the ELF symbol SYM might be a function in SEC, return the
6275 function size and set *CODE_OFF to the function's entry point,
6276 otherwise return zero. */
6277
6278 static bfd_size_type
6279 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6280 bfd_vma *code_off)
6281 {
6282 bfd_size_type size;
6283
6284 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6285 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6286 return 0;
6287
6288 size = 0;
6289 if (!(sym->flags & BSF_SYNTHETIC))
6290 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6291
6292 if (strcmp (sym->section->name, ".opd") == 0)
6293 {
6294 struct _opd_sec_data *opd = get_opd_info (sym->section);
6295 bfd_vma symval = sym->value;
6296
6297 if (opd != NULL
6298 && opd->adjust != NULL
6299 && elf_section_data (sym->section)->relocs != NULL)
6300 {
6301 /* opd_entry_value will use cached relocs that have been
6302 adjusted, but with raw symbols. That means both local
6303 and global symbols need adjusting. */
6304 long adjust = opd->adjust[OPD_NDX (symval)];
6305 if (adjust == -1)
6306 return 0;
6307 symval += adjust;
6308 }
6309
6310 if (opd_entry_value (sym->section, symval,
6311 &sec, code_off, TRUE) == (bfd_vma) -1)
6312 return 0;
6313 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6314 symbol. This size has nothing to do with the code size of the
6315 function, which is what we're supposed to return, but the
6316 code size isn't available without looking up the dot-sym.
6317 However, doing that would be a waste of time particularly
6318 since elf_find_function will look at the dot-sym anyway.
6319 Now, elf_find_function will keep the largest size of any
6320 function sym found at the code address of interest, so return
6321 1 here to avoid it incorrectly caching a larger function size
6322 for a small function. This does mean we return the wrong
6323 size for a new-ABI function of size 24, but all that does is
6324 disable caching for such functions. */
6325 if (size == 24)
6326 size = 1;
6327 }
6328 else
6329 {
6330 if (sym->section != sec)
6331 return 0;
6332 *code_off = sym->value;
6333 }
6334 if (size == 0)
6335 size = 1;
6336 return size;
6337 }
6338
6339 /* Return true if symbol is a strong function defined in an ELFv2
6340 object with st_other localentry bits of zero, ie. its local entry
6341 point coincides with its global entry point. */
6342
6343 static bfd_boolean
6344 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6345 {
6346 return (h != NULL
6347 && h->type == STT_FUNC
6348 && h->root.type == bfd_link_hash_defined
6349 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6350 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6351 && is_ppc64_elf (h->root.u.def.section->owner)
6352 && abiversion (h->root.u.def.section->owner) >= 2);
6353 }
6354
6355 /* Return true if symbol is defined in a regular object file. */
6356
6357 static bfd_boolean
6358 is_static_defined (struct elf_link_hash_entry *h)
6359 {
6360 return ((h->root.type == bfd_link_hash_defined
6361 || h->root.type == bfd_link_hash_defweak)
6362 && h->root.u.def.section != NULL
6363 && h->root.u.def.section->output_section != NULL);
6364 }
6365
6366 /* If FDH is a function descriptor symbol, return the associated code
6367 entry symbol if it is defined. Return NULL otherwise. */
6368
6369 static struct ppc_link_hash_entry *
6370 defined_code_entry (struct ppc_link_hash_entry *fdh)
6371 {
6372 if (fdh->is_func_descriptor)
6373 {
6374 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6375 if (fh->elf.root.type == bfd_link_hash_defined
6376 || fh->elf.root.type == bfd_link_hash_defweak)
6377 return fh;
6378 }
6379 return NULL;
6380 }
6381
6382 /* If FH is a function code entry symbol, return the associated
6383 function descriptor symbol if it is defined. Return NULL otherwise. */
6384
6385 static struct ppc_link_hash_entry *
6386 defined_func_desc (struct ppc_link_hash_entry *fh)
6387 {
6388 if (fh->oh != NULL
6389 && fh->oh->is_func_descriptor)
6390 {
6391 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6392 if (fdh->elf.root.type == bfd_link_hash_defined
6393 || fdh->elf.root.type == bfd_link_hash_defweak)
6394 return fdh;
6395 }
6396 return NULL;
6397 }
6398
6399 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6400
6401 /* Garbage collect sections, after first dealing with dot-symbols. */
6402
6403 static bfd_boolean
6404 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6405 {
6406 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6407
6408 if (htab != NULL && htab->need_func_desc_adj)
6409 {
6410 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6411 htab->need_func_desc_adj = 0;
6412 }
6413 return bfd_elf_gc_sections (abfd, info);
6414 }
6415
6416 /* Mark all our entry sym sections, both opd and code section. */
6417
6418 static void
6419 ppc64_elf_gc_keep (struct bfd_link_info *info)
6420 {
6421 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6422 struct bfd_sym_chain *sym;
6423
6424 if (htab == NULL)
6425 return;
6426
6427 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6428 {
6429 struct ppc_link_hash_entry *eh, *fh;
6430 asection *sec;
6431
6432 eh = (struct ppc_link_hash_entry *)
6433 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6434 if (eh == NULL)
6435 continue;
6436 if (eh->elf.root.type != bfd_link_hash_defined
6437 && eh->elf.root.type != bfd_link_hash_defweak)
6438 continue;
6439
6440 fh = defined_code_entry (eh);
6441 if (fh != NULL)
6442 {
6443 sec = fh->elf.root.u.def.section;
6444 sec->flags |= SEC_KEEP;
6445 }
6446 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6447 && opd_entry_value (eh->elf.root.u.def.section,
6448 eh->elf.root.u.def.value,
6449 &sec, NULL, FALSE) != (bfd_vma) -1)
6450 sec->flags |= SEC_KEEP;
6451
6452 sec = eh->elf.root.u.def.section;
6453 sec->flags |= SEC_KEEP;
6454 }
6455 }
6456
6457 /* Mark sections containing dynamically referenced symbols. When
6458 building shared libraries, we must assume that any visible symbol is
6459 referenced. */
6460
6461 static bfd_boolean
6462 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6463 {
6464 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6465 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6466 struct ppc_link_hash_entry *fdh;
6467 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6468
6469 /* Dynamic linking info is on the func descriptor sym. */
6470 fdh = defined_func_desc (eh);
6471 if (fdh != NULL)
6472 eh = fdh;
6473
6474 if ((eh->elf.root.type == bfd_link_hash_defined
6475 || eh->elf.root.type == bfd_link_hash_defweak)
6476 && (eh->elf.ref_dynamic
6477 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6478 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6479 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6480 && (!bfd_link_executable (info)
6481 || info->gc_keep_exported
6482 || info->export_dynamic
6483 || (eh->elf.dynamic
6484 && d != NULL
6485 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6486 && (eh->elf.versioned >= versioned
6487 || !bfd_hide_sym_by_version (info->version_info,
6488 eh->elf.root.root.string)))))
6489 {
6490 asection *code_sec;
6491 struct ppc_link_hash_entry *fh;
6492
6493 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6494
6495 /* Function descriptor syms cause the associated
6496 function code sym section to be marked. */
6497 fh = defined_code_entry (eh);
6498 if (fh != NULL)
6499 {
6500 code_sec = fh->elf.root.u.def.section;
6501 code_sec->flags |= SEC_KEEP;
6502 }
6503 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6504 && opd_entry_value (eh->elf.root.u.def.section,
6505 eh->elf.root.u.def.value,
6506 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6507 code_sec->flags |= SEC_KEEP;
6508 }
6509
6510 return TRUE;
6511 }
6512
6513 /* Return the section that should be marked against GC for a given
6514 relocation. */
6515
6516 static asection *
6517 ppc64_elf_gc_mark_hook (asection *sec,
6518 struct bfd_link_info *info,
6519 Elf_Internal_Rela *rel,
6520 struct elf_link_hash_entry *h,
6521 Elf_Internal_Sym *sym)
6522 {
6523 asection *rsec;
6524
6525 /* Syms return NULL if we're marking .opd, so we avoid marking all
6526 function sections, as all functions are referenced in .opd. */
6527 rsec = NULL;
6528 if (get_opd_info (sec) != NULL)
6529 return rsec;
6530
6531 if (h != NULL)
6532 {
6533 enum elf_ppc64_reloc_type r_type;
6534 struct ppc_link_hash_entry *eh, *fh, *fdh;
6535
6536 r_type = ELF64_R_TYPE (rel->r_info);
6537 switch (r_type)
6538 {
6539 case R_PPC64_GNU_VTINHERIT:
6540 case R_PPC64_GNU_VTENTRY:
6541 break;
6542
6543 default:
6544 switch (h->root.type)
6545 {
6546 case bfd_link_hash_defined:
6547 case bfd_link_hash_defweak:
6548 eh = (struct ppc_link_hash_entry *) h;
6549 fdh = defined_func_desc (eh);
6550 if (fdh != NULL)
6551 {
6552 /* -mcall-aixdesc code references the dot-symbol on
6553 a call reloc. Mark the function descriptor too
6554 against garbage collection. */
6555 fdh->elf.mark = 1;
6556 if (fdh->elf.u.weakdef != NULL)
6557 fdh->elf.u.weakdef->mark = 1;
6558 eh = fdh;
6559 }
6560
6561 /* Function descriptor syms cause the associated
6562 function code sym section to be marked. */
6563 fh = defined_code_entry (eh);
6564 if (fh != NULL)
6565 {
6566 /* They also mark their opd section. */
6567 eh->elf.root.u.def.section->gc_mark = 1;
6568
6569 rsec = fh->elf.root.u.def.section;
6570 }
6571 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6572 && opd_entry_value (eh->elf.root.u.def.section,
6573 eh->elf.root.u.def.value,
6574 &rsec, NULL, FALSE) != (bfd_vma) -1)
6575 eh->elf.root.u.def.section->gc_mark = 1;
6576 else
6577 rsec = h->root.u.def.section;
6578 break;
6579
6580 case bfd_link_hash_common:
6581 rsec = h->root.u.c.p->section;
6582 break;
6583
6584 default:
6585 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6586 }
6587 }
6588 }
6589 else
6590 {
6591 struct _opd_sec_data *opd;
6592
6593 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6594 opd = get_opd_info (rsec);
6595 if (opd != NULL && opd->func_sec != NULL)
6596 {
6597 rsec->gc_mark = 1;
6598
6599 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6600 }
6601 }
6602
6603 return rsec;
6604 }
6605
6606 /* Update the .got, .plt. and dynamic reloc reference counts for the
6607 section being removed. */
6608
6609 static bfd_boolean
6610 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6611 asection *sec, const Elf_Internal_Rela *relocs)
6612 {
6613 struct ppc_link_hash_table *htab;
6614 Elf_Internal_Shdr *symtab_hdr;
6615 struct elf_link_hash_entry **sym_hashes;
6616 struct got_entry **local_got_ents;
6617 const Elf_Internal_Rela *rel, *relend;
6618
6619 if (bfd_link_relocatable (info))
6620 return TRUE;
6621
6622 if ((sec->flags & SEC_ALLOC) == 0)
6623 return TRUE;
6624
6625 elf_section_data (sec)->local_dynrel = NULL;
6626
6627 htab = ppc_hash_table (info);
6628 if (htab == NULL)
6629 return FALSE;
6630
6631 symtab_hdr = &elf_symtab_hdr (abfd);
6632 sym_hashes = elf_sym_hashes (abfd);
6633 local_got_ents = elf_local_got_ents (abfd);
6634
6635 relend = relocs + sec->reloc_count;
6636 for (rel = relocs; rel < relend; rel++)
6637 {
6638 unsigned long r_symndx;
6639 enum elf_ppc64_reloc_type r_type;
6640 struct elf_link_hash_entry *h = NULL;
6641 struct plt_entry **plt_list = NULL;
6642 unsigned char tls_type = 0;
6643
6644 r_symndx = ELF64_R_SYM (rel->r_info);
6645 r_type = ELF64_R_TYPE (rel->r_info);
6646 if (r_symndx >= symtab_hdr->sh_info)
6647 {
6648 struct ppc_link_hash_entry *eh;
6649 struct elf_dyn_relocs **pp;
6650 struct elf_dyn_relocs *p;
6651
6652 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6653 h = elf_follow_link (h);
6654 eh = (struct ppc_link_hash_entry *) h;
6655
6656 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6657 if (p->sec == sec)
6658 {
6659 /* Everything must go for SEC. */
6660 *pp = p->next;
6661 break;
6662 }
6663 }
6664
6665 switch (r_type)
6666 {
6667 case R_PPC64_GOT_TLSLD16:
6668 case R_PPC64_GOT_TLSLD16_LO:
6669 case R_PPC64_GOT_TLSLD16_HI:
6670 case R_PPC64_GOT_TLSLD16_HA:
6671 tls_type = TLS_TLS | TLS_LD;
6672 goto dogot;
6673
6674 case R_PPC64_GOT_TLSGD16:
6675 case R_PPC64_GOT_TLSGD16_LO:
6676 case R_PPC64_GOT_TLSGD16_HI:
6677 case R_PPC64_GOT_TLSGD16_HA:
6678 tls_type = TLS_TLS | TLS_GD;
6679 goto dogot;
6680
6681 case R_PPC64_GOT_TPREL16_DS:
6682 case R_PPC64_GOT_TPREL16_LO_DS:
6683 case R_PPC64_GOT_TPREL16_HI:
6684 case R_PPC64_GOT_TPREL16_HA:
6685 tls_type = TLS_TLS | TLS_TPREL;
6686 goto dogot;
6687
6688 case R_PPC64_GOT_DTPREL16_DS:
6689 case R_PPC64_GOT_DTPREL16_LO_DS:
6690 case R_PPC64_GOT_DTPREL16_HI:
6691 case R_PPC64_GOT_DTPREL16_HA:
6692 tls_type = TLS_TLS | TLS_DTPREL;
6693 goto dogot;
6694
6695 case R_PPC64_GOT16:
6696 case R_PPC64_GOT16_DS:
6697 case R_PPC64_GOT16_HA:
6698 case R_PPC64_GOT16_HI:
6699 case R_PPC64_GOT16_LO:
6700 case R_PPC64_GOT16_LO_DS:
6701 dogot:
6702 {
6703 struct got_entry *ent;
6704
6705 if (h != NULL)
6706 ent = h->got.glist;
6707 else
6708 ent = local_got_ents[r_symndx];
6709
6710 for (; ent != NULL; ent = ent->next)
6711 if (ent->addend == rel->r_addend
6712 && ent->owner == abfd
6713 && ent->tls_type == tls_type)
6714 break;
6715 if (ent == NULL)
6716 abort ();
6717 if (ent->got.refcount > 0)
6718 ent->got.refcount -= 1;
6719 }
6720 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6721 plt_list = &h->plt.plist;
6722 break;
6723
6724 case R_PPC64_PLT16_HA:
6725 case R_PPC64_PLT16_HI:
6726 case R_PPC64_PLT16_LO:
6727 case R_PPC64_PLT32:
6728 case R_PPC64_PLT64:
6729 case R_PPC64_REL14:
6730 case R_PPC64_REL14_BRNTAKEN:
6731 case R_PPC64_REL14_BRTAKEN:
6732 case R_PPC64_REL24:
6733 if (h != NULL)
6734 plt_list = &h->plt.plist;
6735 else if (local_got_ents != NULL)
6736 {
6737 struct plt_entry **local_plt = (struct plt_entry **)
6738 (local_got_ents + symtab_hdr->sh_info);
6739 unsigned char *local_got_tls_masks = (unsigned char *)
6740 (local_plt + symtab_hdr->sh_info);
6741 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6742 plt_list = local_plt + r_symndx;
6743 }
6744 break;
6745
6746 case R_PPC64_ADDR64:
6747 case R_PPC64_ADDR16:
6748 case R_PPC64_ADDR16_DS:
6749 case R_PPC64_ADDR16_HA:
6750 case R_PPC64_ADDR16_HI:
6751 case R_PPC64_ADDR16_HIGH:
6752 case R_PPC64_ADDR16_HIGHA:
6753 case R_PPC64_ADDR16_HIGHER:
6754 case R_PPC64_ADDR16_HIGHERA:
6755 case R_PPC64_ADDR16_HIGHEST:
6756 case R_PPC64_ADDR16_HIGHESTA:
6757 case R_PPC64_ADDR16_LO:
6758 case R_PPC64_ADDR16_LO_DS:
6759 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6760 && rel->r_addend == 0)
6761 plt_list = &h->plt.plist;
6762 break;
6763
6764 default:
6765 break;
6766 }
6767 if (plt_list != NULL)
6768 {
6769 struct plt_entry *ent;
6770
6771 for (ent = *plt_list; ent != NULL; ent = ent->next)
6772 if (ent->addend == rel->r_addend)
6773 break;
6774 if (ent != NULL && ent->plt.refcount > 0)
6775 ent->plt.refcount -= 1;
6776 }
6777 }
6778 return TRUE;
6779 }
6780
6781 /* The maximum size of .sfpr. */
6782 #define SFPR_MAX (218*4)
6783
6784 struct sfpr_def_parms
6785 {
6786 const char name[12];
6787 unsigned char lo, hi;
6788 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6789 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6790 };
6791
6792 /* Auto-generate _save*, _rest* functions in .sfpr.
6793 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6794 instead. */
6795
6796 static bfd_boolean
6797 sfpr_define (struct bfd_link_info *info,
6798 const struct sfpr_def_parms *parm,
6799 asection *stub_sec)
6800 {
6801 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6802 unsigned int i;
6803 size_t len = strlen (parm->name);
6804 bfd_boolean writing = FALSE;
6805 char sym[16];
6806
6807 if (htab == NULL)
6808 return FALSE;
6809
6810 memcpy (sym, parm->name, len);
6811 sym[len + 2] = 0;
6812
6813 for (i = parm->lo; i <= parm->hi; i++)
6814 {
6815 struct ppc_link_hash_entry *h;
6816
6817 sym[len + 0] = i / 10 + '0';
6818 sym[len + 1] = i % 10 + '0';
6819 h = (struct ppc_link_hash_entry *)
6820 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6821 if (stub_sec != NULL)
6822 {
6823 if (h != NULL
6824 && h->elf.root.type == bfd_link_hash_defined
6825 && h->elf.root.u.def.section == htab->sfpr)
6826 {
6827 struct elf_link_hash_entry *s;
6828 char buf[32];
6829 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6830 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6831 if (s == NULL)
6832 return FALSE;
6833 if (s->root.type == bfd_link_hash_new
6834 || (s->root.type = bfd_link_hash_defined
6835 && s->root.u.def.section == stub_sec))
6836 {
6837 s->root.type = bfd_link_hash_defined;
6838 s->root.u.def.section = stub_sec;
6839 s->root.u.def.value = (stub_sec->size
6840 + h->elf.root.u.def.value);
6841 s->ref_regular = 1;
6842 s->def_regular = 1;
6843 s->ref_regular_nonweak = 1;
6844 s->forced_local = 1;
6845 s->non_elf = 0;
6846 s->root.linker_def = 1;
6847 }
6848 }
6849 continue;
6850 }
6851 if (h != NULL)
6852 {
6853 h->save_res = 1;
6854 if (!h->elf.def_regular)
6855 {
6856 h->elf.root.type = bfd_link_hash_defined;
6857 h->elf.root.u.def.section = htab->sfpr;
6858 h->elf.root.u.def.value = htab->sfpr->size;
6859 h->elf.type = STT_FUNC;
6860 h->elf.def_regular = 1;
6861 h->elf.non_elf = 0;
6862 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6863 writing = TRUE;
6864 if (htab->sfpr->contents == NULL)
6865 {
6866 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6867 if (htab->sfpr->contents == NULL)
6868 return FALSE;
6869 }
6870 }
6871 }
6872 if (writing)
6873 {
6874 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6875 if (i != parm->hi)
6876 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6877 else
6878 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6879 htab->sfpr->size = p - htab->sfpr->contents;
6880 }
6881 }
6882
6883 return TRUE;
6884 }
6885
6886 static bfd_byte *
6887 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6888 {
6889 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6890 return p + 4;
6891 }
6892
6893 static bfd_byte *
6894 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6895 {
6896 p = savegpr0 (abfd, p, r);
6897 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6898 p = p + 4;
6899 bfd_put_32 (abfd, BLR, p);
6900 return p + 4;
6901 }
6902
6903 static bfd_byte *
6904 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6905 {
6906 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6907 return p + 4;
6908 }
6909
6910 static bfd_byte *
6911 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6912 {
6913 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6914 p = p + 4;
6915 p = restgpr0 (abfd, p, r);
6916 bfd_put_32 (abfd, MTLR_R0, p);
6917 p = p + 4;
6918 if (r == 29)
6919 {
6920 p = restgpr0 (abfd, p, 30);
6921 p = restgpr0 (abfd, p, 31);
6922 }
6923 bfd_put_32 (abfd, BLR, p);
6924 return p + 4;
6925 }
6926
6927 static bfd_byte *
6928 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6929 {
6930 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6931 return p + 4;
6932 }
6933
6934 static bfd_byte *
6935 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6936 {
6937 p = savegpr1 (abfd, p, r);
6938 bfd_put_32 (abfd, BLR, p);
6939 return p + 4;
6940 }
6941
6942 static bfd_byte *
6943 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6944 {
6945 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6946 return p + 4;
6947 }
6948
6949 static bfd_byte *
6950 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6951 {
6952 p = restgpr1 (abfd, p, r);
6953 bfd_put_32 (abfd, BLR, p);
6954 return p + 4;
6955 }
6956
6957 static bfd_byte *
6958 savefpr (bfd *abfd, bfd_byte *p, int r)
6959 {
6960 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6961 return p + 4;
6962 }
6963
6964 static bfd_byte *
6965 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6966 {
6967 p = savefpr (abfd, p, r);
6968 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6969 p = p + 4;
6970 bfd_put_32 (abfd, BLR, p);
6971 return p + 4;
6972 }
6973
6974 static bfd_byte *
6975 restfpr (bfd *abfd, bfd_byte *p, int r)
6976 {
6977 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6978 return p + 4;
6979 }
6980
6981 static bfd_byte *
6982 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6983 {
6984 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6985 p = p + 4;
6986 p = restfpr (abfd, p, r);
6987 bfd_put_32 (abfd, MTLR_R0, p);
6988 p = p + 4;
6989 if (r == 29)
6990 {
6991 p = restfpr (abfd, p, 30);
6992 p = restfpr (abfd, p, 31);
6993 }
6994 bfd_put_32 (abfd, BLR, p);
6995 return p + 4;
6996 }
6997
6998 static bfd_byte *
6999 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
7000 {
7001 p = savefpr (abfd, p, r);
7002 bfd_put_32 (abfd, BLR, p);
7003 return p + 4;
7004 }
7005
7006 static bfd_byte *
7007 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
7008 {
7009 p = restfpr (abfd, p, r);
7010 bfd_put_32 (abfd, BLR, p);
7011 return p + 4;
7012 }
7013
7014 static bfd_byte *
7015 savevr (bfd *abfd, bfd_byte *p, int r)
7016 {
7017 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7018 p = p + 4;
7019 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
7020 return p + 4;
7021 }
7022
7023 static bfd_byte *
7024 savevr_tail (bfd *abfd, bfd_byte *p, int r)
7025 {
7026 p = savevr (abfd, p, r);
7027 bfd_put_32 (abfd, BLR, p);
7028 return p + 4;
7029 }
7030
7031 static bfd_byte *
7032 restvr (bfd *abfd, bfd_byte *p, int r)
7033 {
7034 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7035 p = p + 4;
7036 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7037 return p + 4;
7038 }
7039
7040 static bfd_byte *
7041 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7042 {
7043 p = restvr (abfd, p, r);
7044 bfd_put_32 (abfd, BLR, p);
7045 return p + 4;
7046 }
7047
7048 /* Called via elf_link_hash_traverse to transfer dynamic linking
7049 information on function code symbol entries to their corresponding
7050 function descriptor symbol entries. */
7051
7052 static bfd_boolean
7053 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7054 {
7055 struct bfd_link_info *info;
7056 struct ppc_link_hash_table *htab;
7057 struct ppc_link_hash_entry *fh;
7058 struct ppc_link_hash_entry *fdh;
7059 bfd_boolean force_local;
7060
7061 fh = (struct ppc_link_hash_entry *) h;
7062 if (fh->elf.root.type == bfd_link_hash_indirect)
7063 return TRUE;
7064
7065 if (!fh->is_func)
7066 return TRUE;
7067
7068 if (fh->elf.root.root.string[0] != '.'
7069 || fh->elf.root.root.string[1] == '\0')
7070 return TRUE;
7071
7072 info = inf;
7073 htab = ppc_hash_table (info);
7074 if (htab == NULL)
7075 return FALSE;
7076
7077 /* Find the corresponding function descriptor symbol. */
7078 fdh = lookup_fdh (fh, htab);
7079
7080 /* Resolve undefined references to dot-symbols as the value
7081 in the function descriptor, if we have one in a regular object.
7082 This is to satisfy cases like ".quad .foo". Calls to functions
7083 in dynamic objects are handled elsewhere. */
7084 if ((fh->elf.root.type == bfd_link_hash_undefined
7085 || fh->elf.root.type == bfd_link_hash_undefweak)
7086 && (fdh->elf.root.type == bfd_link_hash_defined
7087 || fdh->elf.root.type == bfd_link_hash_defweak)
7088 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7089 && opd_entry_value (fdh->elf.root.u.def.section,
7090 fdh->elf.root.u.def.value,
7091 &fh->elf.root.u.def.section,
7092 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7093 {
7094 fh->elf.root.type = fdh->elf.root.type;
7095 fh->elf.forced_local = 1;
7096 fh->elf.def_regular = fdh->elf.def_regular;
7097 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7098 }
7099
7100 if (!fh->elf.dynamic)
7101 {
7102 struct plt_entry *ent;
7103
7104 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7105 if (ent->plt.refcount > 0)
7106 break;
7107 if (ent == NULL)
7108 return TRUE;
7109 }
7110
7111 /* Create a descriptor as undefined if necessary. */
7112 if (fdh == NULL
7113 && !bfd_link_executable (info)
7114 && (fh->elf.root.type == bfd_link_hash_undefined
7115 || fh->elf.root.type == bfd_link_hash_undefweak))
7116 {
7117 fdh = make_fdh (info, fh);
7118 if (fdh == NULL)
7119 return FALSE;
7120 }
7121
7122 /* We can't support overriding of symbols on a fake descriptor. */
7123 if (fdh != NULL
7124 && fdh->fake
7125 && (fh->elf.root.type == bfd_link_hash_defined
7126 || fh->elf.root.type == bfd_link_hash_defweak))
7127 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7128
7129 /* Transfer dynamic linking information to the function descriptor. */
7130 if (fdh != NULL)
7131 {
7132 fdh->elf.ref_regular |= fh->elf.ref_regular;
7133 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7134 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7135 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7136 fdh->elf.dynamic |= fh->elf.dynamic;
7137 fdh->elf.needs_plt |= (fh->elf.needs_plt
7138 || fh->elf.type == STT_FUNC
7139 || fh->elf.type == STT_GNU_IFUNC);
7140 move_plt_plist (fh, fdh);
7141
7142 if (!fdh->elf.forced_local
7143 && fh->elf.dynindx != -1)
7144 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7145 return FALSE;
7146 }
7147
7148 /* Now that the info is on the function descriptor, clear the
7149 function code sym info. Any function code syms for which we
7150 don't have a definition in a regular file, we force local.
7151 This prevents a shared library from exporting syms that have
7152 been imported from another library. Function code syms that
7153 are really in the library we must leave global to prevent the
7154 linker dragging in a definition from a static library. */
7155 force_local = (!fh->elf.def_regular
7156 || fdh == NULL
7157 || !fdh->elf.def_regular
7158 || fdh->elf.forced_local);
7159 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7160
7161 return TRUE;
7162 }
7163
7164 static const struct sfpr_def_parms save_res_funcs[] =
7165 {
7166 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7167 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7168 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7169 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7170 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7171 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7172 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7173 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7174 { "._savef", 14, 31, savefpr, savefpr1_tail },
7175 { "._restf", 14, 31, restfpr, restfpr1_tail },
7176 { "_savevr_", 20, 31, savevr, savevr_tail },
7177 { "_restvr_", 20, 31, restvr, restvr_tail }
7178 };
7179
7180 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7181 this hook to a) provide some gcc support functions, and b) transfer
7182 dynamic linking information gathered so far on function code symbol
7183 entries, to their corresponding function descriptor symbol entries. */
7184
7185 static bfd_boolean
7186 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7187 struct bfd_link_info *info)
7188 {
7189 struct ppc_link_hash_table *htab;
7190
7191 htab = ppc_hash_table (info);
7192 if (htab == NULL)
7193 return FALSE;
7194
7195 /* Provide any missing _save* and _rest* functions. */
7196 if (htab->sfpr != NULL)
7197 {
7198 unsigned int i;
7199
7200 htab->sfpr->size = 0;
7201 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7202 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7203 return FALSE;
7204 if (htab->sfpr->size == 0)
7205 htab->sfpr->flags |= SEC_EXCLUDE;
7206 }
7207
7208 if (bfd_link_relocatable (info))
7209 return TRUE;
7210
7211 if (htab->elf.hgot != NULL)
7212 {
7213 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7214 /* Make .TOC. defined so as to prevent it being made dynamic.
7215 The wrong value here is fixed later in ppc64_elf_set_toc. */
7216 if (!htab->elf.hgot->def_regular
7217 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7218 {
7219 htab->elf.hgot->root.type = bfd_link_hash_defined;
7220 htab->elf.hgot->root.u.def.value = 0;
7221 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7222 htab->elf.hgot->def_regular = 1;
7223 htab->elf.hgot->root.linker_def = 1;
7224 }
7225 htab->elf.hgot->type = STT_OBJECT;
7226 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7227 | STV_HIDDEN);
7228 }
7229
7230 if (htab->need_func_desc_adj)
7231 {
7232 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7233 htab->need_func_desc_adj = 0;
7234 }
7235
7236 return TRUE;
7237 }
7238
7239 /* Return true if we have dynamic relocs against H that apply to
7240 read-only sections. */
7241
7242 static bfd_boolean
7243 readonly_dynrelocs (struct elf_link_hash_entry *h)
7244 {
7245 struct ppc_link_hash_entry *eh;
7246 struct elf_dyn_relocs *p;
7247
7248 eh = (struct ppc_link_hash_entry *) h;
7249 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7250 {
7251 asection *s = p->sec->output_section;
7252
7253 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7254 return TRUE;
7255 }
7256 return FALSE;
7257 }
7258
7259 /* Return true if we have dynamic relocs against H or any of its weak
7260 aliases, that apply to read-only sections. */
7261
7262 static bfd_boolean
7263 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7264 {
7265 struct ppc_link_hash_entry *eh;
7266
7267 eh = (struct ppc_link_hash_entry *) h;
7268 do
7269 {
7270 if (readonly_dynrelocs (&eh->elf))
7271 return TRUE;
7272 eh = eh->weakref;
7273 } while (eh != NULL && &eh->elf != h);
7274
7275 return FALSE;
7276 }
7277
7278 /* Return whether EH has pc-relative dynamic relocs. */
7279
7280 static bfd_boolean
7281 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7282 {
7283 struct elf_dyn_relocs *p;
7284
7285 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7286 if (p->pc_count != 0)
7287 return TRUE;
7288 return FALSE;
7289 }
7290
7291 /* Return true if a global entry stub will be created for H. Valid
7292 for ELFv2 before plt entries have been allocated. */
7293
7294 static bfd_boolean
7295 global_entry_stub (struct elf_link_hash_entry *h)
7296 {
7297 struct plt_entry *pent;
7298
7299 if (!h->pointer_equality_needed
7300 || h->def_regular)
7301 return FALSE;
7302
7303 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7304 if (pent->plt.refcount > 0
7305 && pent->addend == 0)
7306 return TRUE;
7307
7308 return FALSE;
7309 }
7310
7311 /* Adjust a symbol defined by a dynamic object and referenced by a
7312 regular object. The current definition is in some section of the
7313 dynamic object, but we're not including those sections. We have to
7314 change the definition to something the rest of the link can
7315 understand. */
7316
7317 static bfd_boolean
7318 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7319 struct elf_link_hash_entry *h)
7320 {
7321 struct ppc_link_hash_table *htab;
7322 asection *s, *srel;
7323
7324 htab = ppc_hash_table (info);
7325 if (htab == NULL)
7326 return FALSE;
7327
7328 /* Deal with function syms. */
7329 if (h->type == STT_FUNC
7330 || h->type == STT_GNU_IFUNC
7331 || h->needs_plt)
7332 {
7333 /* Clear procedure linkage table information for any symbol that
7334 won't need a .plt entry. */
7335 struct plt_entry *ent;
7336 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7337 if (ent->plt.refcount > 0)
7338 break;
7339 if (ent == NULL
7340 || (h->type != STT_GNU_IFUNC
7341 && (SYMBOL_CALLS_LOCAL (info, h)
7342 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7343 || ((struct ppc_link_hash_entry *) h)->save_res)
7344 {
7345 h->plt.plist = NULL;
7346 h->needs_plt = 0;
7347 h->pointer_equality_needed = 0;
7348 }
7349 else if (abiversion (info->output_bfd) >= 2)
7350 {
7351 /* Taking a function's address in a read/write section
7352 doesn't require us to define the function symbol in the
7353 executable on a global entry stub. A dynamic reloc can
7354 be used instead. The reason we prefer a few more dynamic
7355 relocs is that calling via a global entry stub costs a
7356 few more instructions, and pointer_equality_needed causes
7357 extra work in ld.so when resolving these symbols. */
7358 if (global_entry_stub (h)
7359 && !alias_readonly_dynrelocs (h))
7360 {
7361 h->pointer_equality_needed = 0;
7362 /* After adjust_dynamic_symbol, non_got_ref set in
7363 the non-pic case means that dyn_relocs for this
7364 symbol should be discarded. */
7365 h->non_got_ref = 0;
7366 }
7367
7368 /* If making a plt entry, then we don't need copy relocs. */
7369 return TRUE;
7370 }
7371 }
7372 else
7373 h->plt.plist = NULL;
7374
7375 /* If this is a weak symbol, and there is a real definition, the
7376 processor independent code will have arranged for us to see the
7377 real definition first, and we can just use the same value. */
7378 if (h->u.weakdef != NULL)
7379 {
7380 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7381 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7382 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7383 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7384 if (ELIMINATE_COPY_RELOCS)
7385 h->non_got_ref = h->u.weakdef->non_got_ref;
7386 return TRUE;
7387 }
7388
7389 /* If we are creating a shared library, we must presume that the
7390 only references to the symbol are via the global offset table.
7391 For such cases we need not do anything here; the relocations will
7392 be handled correctly by relocate_section. */
7393 if (bfd_link_pic (info))
7394 return TRUE;
7395
7396 /* If there are no references to this symbol that do not use the
7397 GOT, we don't need to generate a copy reloc. */
7398 if (!h->non_got_ref)
7399 return TRUE;
7400
7401 /* Don't generate a copy reloc for symbols defined in the executable. */
7402 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7403
7404 /* If -z nocopyreloc was given, don't generate them either. */
7405 || info->nocopyreloc
7406
7407 /* If we didn't find any dynamic relocs in read-only sections, then
7408 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7409 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7410
7411 /* Protected variables do not work with .dynbss. The copy in
7412 .dynbss won't be used by the shared library with the protected
7413 definition for the variable. Text relocations are preferable
7414 to an incorrect program. */
7415 || h->protected_def)
7416 {
7417 h->non_got_ref = 0;
7418 return TRUE;
7419 }
7420
7421 if (h->plt.plist != NULL)
7422 {
7423 /* We should never get here, but unfortunately there are versions
7424 of gcc out there that improperly (for this ABI) put initialized
7425 function pointers, vtable refs and suchlike in read-only
7426 sections. Allow them to proceed, but warn that this might
7427 break at runtime. */
7428 info->callbacks->einfo
7429 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7430 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7431 h->root.root.string);
7432 }
7433
7434 /* This is a reference to a symbol defined by a dynamic object which
7435 is not a function. */
7436
7437 /* We must allocate the symbol in our .dynbss section, which will
7438 become part of the .bss section of the executable. There will be
7439 an entry for this symbol in the .dynsym section. The dynamic
7440 object will contain position independent code, so all references
7441 from the dynamic object to this symbol will go through the global
7442 offset table. The dynamic linker will use the .dynsym entry to
7443 determine the address it must put in the global offset table, so
7444 both the dynamic object and the regular object will refer to the
7445 same memory location for the variable. */
7446
7447 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7448 to copy the initial value out of the dynamic object and into the
7449 runtime process image. We need to remember the offset into the
7450 .rela.bss section we are going to use. */
7451 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7452 {
7453 s = htab->elf.sdynrelro;
7454 srel = htab->elf.sreldynrelro;
7455 }
7456 else
7457 {
7458 s = htab->elf.sdynbss;
7459 srel = htab->elf.srelbss;
7460 }
7461 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7462 {
7463 srel->size += sizeof (Elf64_External_Rela);
7464 h->needs_copy = 1;
7465 }
7466
7467 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7468 }
7469
7470 /* If given a function descriptor symbol, hide both the function code
7471 sym and the descriptor. */
7472 static void
7473 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7474 struct elf_link_hash_entry *h,
7475 bfd_boolean force_local)
7476 {
7477 struct ppc_link_hash_entry *eh;
7478 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7479
7480 eh = (struct ppc_link_hash_entry *) h;
7481 if (eh->is_func_descriptor)
7482 {
7483 struct ppc_link_hash_entry *fh = eh->oh;
7484
7485 if (fh == NULL)
7486 {
7487 const char *p, *q;
7488 struct elf_link_hash_table *htab = elf_hash_table (info);
7489 char save;
7490
7491 /* We aren't supposed to use alloca in BFD because on
7492 systems which do not have alloca the version in libiberty
7493 calls xmalloc, which might cause the program to crash
7494 when it runs out of memory. This function doesn't have a
7495 return status, so there's no way to gracefully return an
7496 error. So cheat. We know that string[-1] can be safely
7497 accessed; It's either a string in an ELF string table,
7498 or allocated in an objalloc structure. */
7499
7500 p = eh->elf.root.root.string - 1;
7501 save = *p;
7502 *(char *) p = '.';
7503 fh = (struct ppc_link_hash_entry *)
7504 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7505 *(char *) p = save;
7506
7507 /* Unfortunately, if it so happens that the string we were
7508 looking for was allocated immediately before this string,
7509 then we overwrote the string terminator. That's the only
7510 reason the lookup should fail. */
7511 if (fh == NULL)
7512 {
7513 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7514 while (q >= eh->elf.root.root.string && *q == *p)
7515 --q, --p;
7516 if (q < eh->elf.root.root.string && *p == '.')
7517 fh = (struct ppc_link_hash_entry *)
7518 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7519 }
7520 if (fh != NULL)
7521 {
7522 eh->oh = fh;
7523 fh->oh = eh;
7524 }
7525 }
7526 if (fh != NULL)
7527 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7528 }
7529 }
7530
7531 static bfd_boolean
7532 get_sym_h (struct elf_link_hash_entry **hp,
7533 Elf_Internal_Sym **symp,
7534 asection **symsecp,
7535 unsigned char **tls_maskp,
7536 Elf_Internal_Sym **locsymsp,
7537 unsigned long r_symndx,
7538 bfd *ibfd)
7539 {
7540 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7541
7542 if (r_symndx >= symtab_hdr->sh_info)
7543 {
7544 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7545 struct elf_link_hash_entry *h;
7546
7547 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7548 h = elf_follow_link (h);
7549
7550 if (hp != NULL)
7551 *hp = h;
7552
7553 if (symp != NULL)
7554 *symp = NULL;
7555
7556 if (symsecp != NULL)
7557 {
7558 asection *symsec = NULL;
7559 if (h->root.type == bfd_link_hash_defined
7560 || h->root.type == bfd_link_hash_defweak)
7561 symsec = h->root.u.def.section;
7562 *symsecp = symsec;
7563 }
7564
7565 if (tls_maskp != NULL)
7566 {
7567 struct ppc_link_hash_entry *eh;
7568
7569 eh = (struct ppc_link_hash_entry *) h;
7570 *tls_maskp = &eh->tls_mask;
7571 }
7572 }
7573 else
7574 {
7575 Elf_Internal_Sym *sym;
7576 Elf_Internal_Sym *locsyms = *locsymsp;
7577
7578 if (locsyms == NULL)
7579 {
7580 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7581 if (locsyms == NULL)
7582 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7583 symtab_hdr->sh_info,
7584 0, NULL, NULL, NULL);
7585 if (locsyms == NULL)
7586 return FALSE;
7587 *locsymsp = locsyms;
7588 }
7589 sym = locsyms + r_symndx;
7590
7591 if (hp != NULL)
7592 *hp = NULL;
7593
7594 if (symp != NULL)
7595 *symp = sym;
7596
7597 if (symsecp != NULL)
7598 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7599
7600 if (tls_maskp != NULL)
7601 {
7602 struct got_entry **lgot_ents;
7603 unsigned char *tls_mask;
7604
7605 tls_mask = NULL;
7606 lgot_ents = elf_local_got_ents (ibfd);
7607 if (lgot_ents != NULL)
7608 {
7609 struct plt_entry **local_plt = (struct plt_entry **)
7610 (lgot_ents + symtab_hdr->sh_info);
7611 unsigned char *lgot_masks = (unsigned char *)
7612 (local_plt + symtab_hdr->sh_info);
7613 tls_mask = &lgot_masks[r_symndx];
7614 }
7615 *tls_maskp = tls_mask;
7616 }
7617 }
7618 return TRUE;
7619 }
7620
7621 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7622 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7623 type suitable for optimization, and 1 otherwise. */
7624
7625 static int
7626 get_tls_mask (unsigned char **tls_maskp,
7627 unsigned long *toc_symndx,
7628 bfd_vma *toc_addend,
7629 Elf_Internal_Sym **locsymsp,
7630 const Elf_Internal_Rela *rel,
7631 bfd *ibfd)
7632 {
7633 unsigned long r_symndx;
7634 int next_r;
7635 struct elf_link_hash_entry *h;
7636 Elf_Internal_Sym *sym;
7637 asection *sec;
7638 bfd_vma off;
7639
7640 r_symndx = ELF64_R_SYM (rel->r_info);
7641 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7642 return 0;
7643
7644 if ((*tls_maskp != NULL && **tls_maskp != 0)
7645 || sec == NULL
7646 || ppc64_elf_section_data (sec) == NULL
7647 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7648 return 1;
7649
7650 /* Look inside a TOC section too. */
7651 if (h != NULL)
7652 {
7653 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7654 off = h->root.u.def.value;
7655 }
7656 else
7657 off = sym->st_value;
7658 off += rel->r_addend;
7659 BFD_ASSERT (off % 8 == 0);
7660 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7661 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7662 if (toc_symndx != NULL)
7663 *toc_symndx = r_symndx;
7664 if (toc_addend != NULL)
7665 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7666 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7667 return 0;
7668 if ((h == NULL || is_static_defined (h))
7669 && (next_r == -1 || next_r == -2))
7670 return 1 - next_r;
7671 return 1;
7672 }
7673
7674 /* Find (or create) an entry in the tocsave hash table. */
7675
7676 static struct tocsave_entry *
7677 tocsave_find (struct ppc_link_hash_table *htab,
7678 enum insert_option insert,
7679 Elf_Internal_Sym **local_syms,
7680 const Elf_Internal_Rela *irela,
7681 bfd *ibfd)
7682 {
7683 unsigned long r_indx;
7684 struct elf_link_hash_entry *h;
7685 Elf_Internal_Sym *sym;
7686 struct tocsave_entry ent, *p;
7687 hashval_t hash;
7688 struct tocsave_entry **slot;
7689
7690 r_indx = ELF64_R_SYM (irela->r_info);
7691 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7692 return NULL;
7693 if (ent.sec == NULL || ent.sec->output_section == NULL)
7694 {
7695 _bfd_error_handler
7696 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7697 return NULL;
7698 }
7699
7700 if (h != NULL)
7701 ent.offset = h->root.u.def.value;
7702 else
7703 ent.offset = sym->st_value;
7704 ent.offset += irela->r_addend;
7705
7706 hash = tocsave_htab_hash (&ent);
7707 slot = ((struct tocsave_entry **)
7708 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7709 if (slot == NULL)
7710 return NULL;
7711
7712 if (*slot == NULL)
7713 {
7714 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7715 if (p == NULL)
7716 return NULL;
7717 *p = ent;
7718 *slot = p;
7719 }
7720 return *slot;
7721 }
7722
7723 /* Adjust all global syms defined in opd sections. In gcc generated
7724 code for the old ABI, these will already have been done. */
7725
7726 static bfd_boolean
7727 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7728 {
7729 struct ppc_link_hash_entry *eh;
7730 asection *sym_sec;
7731 struct _opd_sec_data *opd;
7732
7733 if (h->root.type == bfd_link_hash_indirect)
7734 return TRUE;
7735
7736 if (h->root.type != bfd_link_hash_defined
7737 && h->root.type != bfd_link_hash_defweak)
7738 return TRUE;
7739
7740 eh = (struct ppc_link_hash_entry *) h;
7741 if (eh->adjust_done)
7742 return TRUE;
7743
7744 sym_sec = eh->elf.root.u.def.section;
7745 opd = get_opd_info (sym_sec);
7746 if (opd != NULL && opd->adjust != NULL)
7747 {
7748 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7749 if (adjust == -1)
7750 {
7751 /* This entry has been deleted. */
7752 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7753 if (dsec == NULL)
7754 {
7755 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7756 if (discarded_section (dsec))
7757 {
7758 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7759 break;
7760 }
7761 }
7762 eh->elf.root.u.def.value = 0;
7763 eh->elf.root.u.def.section = dsec;
7764 }
7765 else
7766 eh->elf.root.u.def.value += adjust;
7767 eh->adjust_done = 1;
7768 }
7769 return TRUE;
7770 }
7771
7772 /* Handles decrementing dynamic reloc counts for the reloc specified by
7773 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7774 have already been determined. */
7775
7776 static bfd_boolean
7777 dec_dynrel_count (bfd_vma r_info,
7778 asection *sec,
7779 struct bfd_link_info *info,
7780 Elf_Internal_Sym **local_syms,
7781 struct elf_link_hash_entry *h,
7782 Elf_Internal_Sym *sym)
7783 {
7784 enum elf_ppc64_reloc_type r_type;
7785 asection *sym_sec = NULL;
7786
7787 /* Can this reloc be dynamic? This switch, and later tests here
7788 should be kept in sync with the code in check_relocs. */
7789 r_type = ELF64_R_TYPE (r_info);
7790 switch (r_type)
7791 {
7792 default:
7793 return TRUE;
7794
7795 case R_PPC64_TPREL16:
7796 case R_PPC64_TPREL16_LO:
7797 case R_PPC64_TPREL16_HI:
7798 case R_PPC64_TPREL16_HA:
7799 case R_PPC64_TPREL16_DS:
7800 case R_PPC64_TPREL16_LO_DS:
7801 case R_PPC64_TPREL16_HIGH:
7802 case R_PPC64_TPREL16_HIGHA:
7803 case R_PPC64_TPREL16_HIGHER:
7804 case R_PPC64_TPREL16_HIGHERA:
7805 case R_PPC64_TPREL16_HIGHEST:
7806 case R_PPC64_TPREL16_HIGHESTA:
7807 case R_PPC64_TPREL64:
7808 case R_PPC64_DTPMOD64:
7809 case R_PPC64_DTPREL64:
7810 case R_PPC64_ADDR64:
7811 case R_PPC64_REL30:
7812 case R_PPC64_REL32:
7813 case R_PPC64_REL64:
7814 case R_PPC64_ADDR14:
7815 case R_PPC64_ADDR14_BRNTAKEN:
7816 case R_PPC64_ADDR14_BRTAKEN:
7817 case R_PPC64_ADDR16:
7818 case R_PPC64_ADDR16_DS:
7819 case R_PPC64_ADDR16_HA:
7820 case R_PPC64_ADDR16_HI:
7821 case R_PPC64_ADDR16_HIGH:
7822 case R_PPC64_ADDR16_HIGHA:
7823 case R_PPC64_ADDR16_HIGHER:
7824 case R_PPC64_ADDR16_HIGHERA:
7825 case R_PPC64_ADDR16_HIGHEST:
7826 case R_PPC64_ADDR16_HIGHESTA:
7827 case R_PPC64_ADDR16_LO:
7828 case R_PPC64_ADDR16_LO_DS:
7829 case R_PPC64_ADDR24:
7830 case R_PPC64_ADDR32:
7831 case R_PPC64_UADDR16:
7832 case R_PPC64_UADDR32:
7833 case R_PPC64_UADDR64:
7834 case R_PPC64_TOC:
7835 break;
7836 }
7837
7838 if (local_syms != NULL)
7839 {
7840 unsigned long r_symndx;
7841 bfd *ibfd = sec->owner;
7842
7843 r_symndx = ELF64_R_SYM (r_info);
7844 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7845 return FALSE;
7846 }
7847
7848 if ((bfd_link_pic (info)
7849 && (must_be_dyn_reloc (info, r_type)
7850 || (h != NULL
7851 && (!SYMBOLIC_BIND (info, h)
7852 || h->root.type == bfd_link_hash_defweak
7853 || !h->def_regular))))
7854 || (ELIMINATE_COPY_RELOCS
7855 && !bfd_link_pic (info)
7856 && h != NULL
7857 && (h->root.type == bfd_link_hash_defweak
7858 || !h->def_regular)))
7859 ;
7860 else
7861 return TRUE;
7862
7863 if (h != NULL)
7864 {
7865 struct elf_dyn_relocs *p;
7866 struct elf_dyn_relocs **pp;
7867 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7868
7869 /* elf_gc_sweep may have already removed all dyn relocs associated
7870 with local syms for a given section. Also, symbol flags are
7871 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7872 report a dynreloc miscount. */
7873 if (*pp == NULL && info->gc_sections)
7874 return TRUE;
7875
7876 while ((p = *pp) != NULL)
7877 {
7878 if (p->sec == sec)
7879 {
7880 if (!must_be_dyn_reloc (info, r_type))
7881 p->pc_count -= 1;
7882 p->count -= 1;
7883 if (p->count == 0)
7884 *pp = p->next;
7885 return TRUE;
7886 }
7887 pp = &p->next;
7888 }
7889 }
7890 else
7891 {
7892 struct ppc_dyn_relocs *p;
7893 struct ppc_dyn_relocs **pp;
7894 void *vpp;
7895 bfd_boolean is_ifunc;
7896
7897 if (local_syms == NULL)
7898 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7899 if (sym_sec == NULL)
7900 sym_sec = sec;
7901
7902 vpp = &elf_section_data (sym_sec)->local_dynrel;
7903 pp = (struct ppc_dyn_relocs **) vpp;
7904
7905 if (*pp == NULL && info->gc_sections)
7906 return TRUE;
7907
7908 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7909 while ((p = *pp) != NULL)
7910 {
7911 if (p->sec == sec && p->ifunc == is_ifunc)
7912 {
7913 p->count -= 1;
7914 if (p->count == 0)
7915 *pp = p->next;
7916 return TRUE;
7917 }
7918 pp = &p->next;
7919 }
7920 }
7921
7922 /* xgettext:c-format */
7923 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7924 sec->owner, sec);
7925 bfd_set_error (bfd_error_bad_value);
7926 return FALSE;
7927 }
7928
7929 /* Remove unused Official Procedure Descriptor entries. Currently we
7930 only remove those associated with functions in discarded link-once
7931 sections, or weakly defined functions that have been overridden. It
7932 would be possible to remove many more entries for statically linked
7933 applications. */
7934
7935 bfd_boolean
7936 ppc64_elf_edit_opd (struct bfd_link_info *info)
7937 {
7938 bfd *ibfd;
7939 bfd_boolean some_edited = FALSE;
7940 asection *need_pad = NULL;
7941 struct ppc_link_hash_table *htab;
7942
7943 htab = ppc_hash_table (info);
7944 if (htab == NULL)
7945 return FALSE;
7946
7947 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7948 {
7949 asection *sec;
7950 Elf_Internal_Rela *relstart, *rel, *relend;
7951 Elf_Internal_Shdr *symtab_hdr;
7952 Elf_Internal_Sym *local_syms;
7953 struct _opd_sec_data *opd;
7954 bfd_boolean need_edit, add_aux_fields, broken;
7955 bfd_size_type cnt_16b = 0;
7956
7957 if (!is_ppc64_elf (ibfd))
7958 continue;
7959
7960 sec = bfd_get_section_by_name (ibfd, ".opd");
7961 if (sec == NULL || sec->size == 0)
7962 continue;
7963
7964 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7965 continue;
7966
7967 if (sec->output_section == bfd_abs_section_ptr)
7968 continue;
7969
7970 /* Look through the section relocs. */
7971 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7972 continue;
7973
7974 local_syms = NULL;
7975 symtab_hdr = &elf_symtab_hdr (ibfd);
7976
7977 /* Read the relocations. */
7978 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7979 info->keep_memory);
7980 if (relstart == NULL)
7981 return FALSE;
7982
7983 /* First run through the relocs to check they are sane, and to
7984 determine whether we need to edit this opd section. */
7985 need_edit = FALSE;
7986 broken = FALSE;
7987 need_pad = sec;
7988 relend = relstart + sec->reloc_count;
7989 for (rel = relstart; rel < relend; )
7990 {
7991 enum elf_ppc64_reloc_type r_type;
7992 unsigned long r_symndx;
7993 asection *sym_sec;
7994 struct elf_link_hash_entry *h;
7995 Elf_Internal_Sym *sym;
7996 bfd_vma offset;
7997
7998 /* .opd contains an array of 16 or 24 byte entries. We're
7999 only interested in the reloc pointing to a function entry
8000 point. */
8001 offset = rel->r_offset;
8002 if (rel + 1 == relend
8003 || rel[1].r_offset != offset + 8)
8004 {
8005 /* If someone messes with .opd alignment then after a
8006 "ld -r" we might have padding in the middle of .opd.
8007 Also, there's nothing to prevent someone putting
8008 something silly in .opd with the assembler. No .opd
8009 optimization for them! */
8010 broken_opd:
8011 _bfd_error_handler
8012 (_("%B: .opd is not a regular array of opd entries"), ibfd);
8013 broken = TRUE;
8014 break;
8015 }
8016
8017 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
8018 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
8019 {
8020 _bfd_error_handler
8021 /* xgettext:c-format */
8022 (_("%B: unexpected reloc type %u in .opd section"),
8023 ibfd, r_type);
8024 broken = TRUE;
8025 break;
8026 }
8027
8028 r_symndx = ELF64_R_SYM (rel->r_info);
8029 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8030 r_symndx, ibfd))
8031 goto error_ret;
8032
8033 if (sym_sec == NULL || sym_sec->owner == NULL)
8034 {
8035 const char *sym_name;
8036 if (h != NULL)
8037 sym_name = h->root.root.string;
8038 else
8039 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8040 sym_sec);
8041
8042 _bfd_error_handler
8043 /* xgettext:c-format */
8044 (_("%B: undefined sym `%s' in .opd section"),
8045 ibfd, sym_name);
8046 broken = TRUE;
8047 break;
8048 }
8049
8050 /* opd entries are always for functions defined in the
8051 current input bfd. If the symbol isn't defined in the
8052 input bfd, then we won't be using the function in this
8053 bfd; It must be defined in a linkonce section in another
8054 bfd, or is weak. It's also possible that we are
8055 discarding the function due to a linker script /DISCARD/,
8056 which we test for via the output_section. */
8057 if (sym_sec->owner != ibfd
8058 || sym_sec->output_section == bfd_abs_section_ptr)
8059 need_edit = TRUE;
8060
8061 rel += 2;
8062 if (rel + 1 == relend
8063 || (rel + 2 < relend
8064 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8065 ++rel;
8066
8067 if (rel == relend)
8068 {
8069 if (sec->size == offset + 24)
8070 {
8071 need_pad = NULL;
8072 break;
8073 }
8074 if (sec->size == offset + 16)
8075 {
8076 cnt_16b++;
8077 break;
8078 }
8079 goto broken_opd;
8080 }
8081 else if (rel + 1 < relend
8082 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8083 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8084 {
8085 if (rel[0].r_offset == offset + 16)
8086 cnt_16b++;
8087 else if (rel[0].r_offset != offset + 24)
8088 goto broken_opd;
8089 }
8090 else
8091 goto broken_opd;
8092 }
8093
8094 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8095
8096 if (!broken && (need_edit || add_aux_fields))
8097 {
8098 Elf_Internal_Rela *write_rel;
8099 Elf_Internal_Shdr *rel_hdr;
8100 bfd_byte *rptr, *wptr;
8101 bfd_byte *new_contents;
8102 bfd_size_type amt;
8103
8104 new_contents = NULL;
8105 amt = OPD_NDX (sec->size) * sizeof (long);
8106 opd = &ppc64_elf_section_data (sec)->u.opd;
8107 opd->adjust = bfd_zalloc (sec->owner, amt);
8108 if (opd->adjust == NULL)
8109 return FALSE;
8110 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8111
8112 /* This seems a waste of time as input .opd sections are all
8113 zeros as generated by gcc, but I suppose there's no reason
8114 this will always be so. We might start putting something in
8115 the third word of .opd entries. */
8116 if ((sec->flags & SEC_IN_MEMORY) == 0)
8117 {
8118 bfd_byte *loc;
8119 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8120 {
8121 if (loc != NULL)
8122 free (loc);
8123 error_ret:
8124 if (local_syms != NULL
8125 && symtab_hdr->contents != (unsigned char *) local_syms)
8126 free (local_syms);
8127 if (elf_section_data (sec)->relocs != relstart)
8128 free (relstart);
8129 return FALSE;
8130 }
8131 sec->contents = loc;
8132 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8133 }
8134
8135 elf_section_data (sec)->relocs = relstart;
8136
8137 new_contents = sec->contents;
8138 if (add_aux_fields)
8139 {
8140 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8141 if (new_contents == NULL)
8142 return FALSE;
8143 need_pad = NULL;
8144 }
8145 wptr = new_contents;
8146 rptr = sec->contents;
8147 write_rel = relstart;
8148 for (rel = relstart; rel < relend; )
8149 {
8150 unsigned long r_symndx;
8151 asection *sym_sec;
8152 struct elf_link_hash_entry *h;
8153 struct ppc_link_hash_entry *fdh = NULL;
8154 Elf_Internal_Sym *sym;
8155 long opd_ent_size;
8156 Elf_Internal_Rela *next_rel;
8157 bfd_boolean skip;
8158
8159 r_symndx = ELF64_R_SYM (rel->r_info);
8160 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8161 r_symndx, ibfd))
8162 goto error_ret;
8163
8164 next_rel = rel + 2;
8165 if (next_rel + 1 == relend
8166 || (next_rel + 2 < relend
8167 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8168 ++next_rel;
8169
8170 /* See if the .opd entry is full 24 byte or
8171 16 byte (with fd_aux entry overlapped with next
8172 fd_func). */
8173 opd_ent_size = 24;
8174 if (next_rel == relend)
8175 {
8176 if (sec->size == rel->r_offset + 16)
8177 opd_ent_size = 16;
8178 }
8179 else if (next_rel->r_offset == rel->r_offset + 16)
8180 opd_ent_size = 16;
8181
8182 if (h != NULL
8183 && h->root.root.string[0] == '.')
8184 {
8185 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8186 if (fdh != NULL)
8187 {
8188 fdh = ppc_follow_link (fdh);
8189 if (fdh->elf.root.type != bfd_link_hash_defined
8190 && fdh->elf.root.type != bfd_link_hash_defweak)
8191 fdh = NULL;
8192 }
8193 }
8194
8195 skip = (sym_sec->owner != ibfd
8196 || sym_sec->output_section == bfd_abs_section_ptr);
8197 if (skip)
8198 {
8199 if (fdh != NULL && sym_sec->owner == ibfd)
8200 {
8201 /* Arrange for the function descriptor sym
8202 to be dropped. */
8203 fdh->elf.root.u.def.value = 0;
8204 fdh->elf.root.u.def.section = sym_sec;
8205 }
8206 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8207
8208 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8209 rel = next_rel;
8210 else
8211 while (1)
8212 {
8213 if (!dec_dynrel_count (rel->r_info, sec, info,
8214 NULL, h, sym))
8215 goto error_ret;
8216
8217 if (++rel == next_rel)
8218 break;
8219
8220 r_symndx = ELF64_R_SYM (rel->r_info);
8221 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8222 r_symndx, ibfd))
8223 goto error_ret;
8224 }
8225 }
8226 else
8227 {
8228 /* We'll be keeping this opd entry. */
8229 long adjust;
8230
8231 if (fdh != NULL)
8232 {
8233 /* Redefine the function descriptor symbol to
8234 this location in the opd section. It is
8235 necessary to update the value here rather
8236 than using an array of adjustments as we do
8237 for local symbols, because various places
8238 in the generic ELF code use the value
8239 stored in u.def.value. */
8240 fdh->elf.root.u.def.value = wptr - new_contents;
8241 fdh->adjust_done = 1;
8242 }
8243
8244 /* Local syms are a bit tricky. We could
8245 tweak them as they can be cached, but
8246 we'd need to look through the local syms
8247 for the function descriptor sym which we
8248 don't have at the moment. So keep an
8249 array of adjustments. */
8250 adjust = (wptr - new_contents) - (rptr - sec->contents);
8251 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8252
8253 if (wptr != rptr)
8254 memcpy (wptr, rptr, opd_ent_size);
8255 wptr += opd_ent_size;
8256 if (add_aux_fields && opd_ent_size == 16)
8257 {
8258 memset (wptr, '\0', 8);
8259 wptr += 8;
8260 }
8261
8262 /* We need to adjust any reloc offsets to point to the
8263 new opd entries. */
8264 for ( ; rel != next_rel; ++rel)
8265 {
8266 rel->r_offset += adjust;
8267 if (write_rel != rel)
8268 memcpy (write_rel, rel, sizeof (*rel));
8269 ++write_rel;
8270 }
8271 }
8272
8273 rptr += opd_ent_size;
8274 }
8275
8276 sec->size = wptr - new_contents;
8277 sec->reloc_count = write_rel - relstart;
8278 if (add_aux_fields)
8279 {
8280 free (sec->contents);
8281 sec->contents = new_contents;
8282 }
8283
8284 /* Fudge the header size too, as this is used later in
8285 elf_bfd_final_link if we are emitting relocs. */
8286 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8287 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8288 some_edited = TRUE;
8289 }
8290 else if (elf_section_data (sec)->relocs != relstart)
8291 free (relstart);
8292
8293 if (local_syms != NULL
8294 && symtab_hdr->contents != (unsigned char *) local_syms)
8295 {
8296 if (!info->keep_memory)
8297 free (local_syms);
8298 else
8299 symtab_hdr->contents = (unsigned char *) local_syms;
8300 }
8301 }
8302
8303 if (some_edited)
8304 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8305
8306 /* If we are doing a final link and the last .opd entry is just 16 byte
8307 long, add a 8 byte padding after it. */
8308 if (need_pad != NULL && !bfd_link_relocatable (info))
8309 {
8310 bfd_byte *p;
8311
8312 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8313 {
8314 BFD_ASSERT (need_pad->size > 0);
8315
8316 p = bfd_malloc (need_pad->size + 8);
8317 if (p == NULL)
8318 return FALSE;
8319
8320 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8321 p, 0, need_pad->size))
8322 return FALSE;
8323
8324 need_pad->contents = p;
8325 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8326 }
8327 else
8328 {
8329 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8330 if (p == NULL)
8331 return FALSE;
8332
8333 need_pad->contents = p;
8334 }
8335
8336 memset (need_pad->contents + need_pad->size, 0, 8);
8337 need_pad->size += 8;
8338 }
8339
8340 return TRUE;
8341 }
8342
8343 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8344
8345 asection *
8346 ppc64_elf_tls_setup (struct bfd_link_info *info)
8347 {
8348 struct ppc_link_hash_table *htab;
8349
8350 htab = ppc_hash_table (info);
8351 if (htab == NULL)
8352 return NULL;
8353
8354 if (abiversion (info->output_bfd) == 1)
8355 htab->opd_abi = 1;
8356
8357 if (htab->params->no_multi_toc)
8358 htab->do_multi_toc = 0;
8359 else if (!htab->do_multi_toc)
8360 htab->params->no_multi_toc = 1;
8361
8362 /* Default to --no-plt-localentry, as this option can cause problems
8363 with symbol interposition. For example, glibc libpthread.so and
8364 libc.so duplicate many pthread symbols, with a fallback
8365 implementation in libc.so. In some cases the fallback does more
8366 work than the pthread implementation. __pthread_condattr_destroy
8367 is one such symbol: the libpthread.so implementation is
8368 localentry:0 while the libc.so implementation is localentry:8.
8369 An app that "cleverly" uses dlopen to only load necessary
8370 libraries at runtime may omit loading libpthread.so when not
8371 running multi-threaded, which then results in the libc.so
8372 fallback symbols being used and ld.so complaining. Now there
8373 are workarounds in ld (see non_zero_localentry) to detect the
8374 pthread situation, but that may not be the only case where
8375 --plt-localentry can cause trouble. */
8376 if (htab->params->plt_localentry0 < 0)
8377 htab->params->plt_localentry0 = 0;
8378 if (htab->params->plt_localentry0
8379 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8380 FALSE, FALSE, FALSE) == NULL)
8381 info->callbacks->einfo
8382 (_("%P: warning: --plt-localentry is especially dangerous without "
8383 "ld.so support to detect ABI violations.\n"));
8384
8385 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8386 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8387 FALSE, FALSE, TRUE));
8388 /* Move dynamic linking info to the function descriptor sym. */
8389 if (htab->tls_get_addr != NULL)
8390 func_desc_adjust (&htab->tls_get_addr->elf, info);
8391 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8392 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8393 FALSE, FALSE, TRUE));
8394 if (htab->params->tls_get_addr_opt)
8395 {
8396 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8397
8398 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8399 FALSE, FALSE, TRUE);
8400 if (opt != NULL)
8401 func_desc_adjust (opt, info);
8402 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8403 FALSE, FALSE, TRUE);
8404 if (opt_fd != NULL
8405 && (opt_fd->root.type == bfd_link_hash_defined
8406 || opt_fd->root.type == bfd_link_hash_defweak))
8407 {
8408 /* If glibc supports an optimized __tls_get_addr call stub,
8409 signalled by the presence of __tls_get_addr_opt, and we'll
8410 be calling __tls_get_addr via a plt call stub, then
8411 make __tls_get_addr point to __tls_get_addr_opt. */
8412 tga_fd = &htab->tls_get_addr_fd->elf;
8413 if (htab->elf.dynamic_sections_created
8414 && tga_fd != NULL
8415 && (tga_fd->type == STT_FUNC
8416 || tga_fd->needs_plt)
8417 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8418 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8419 {
8420 struct plt_entry *ent;
8421
8422 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8423 if (ent->plt.refcount > 0)
8424 break;
8425 if (ent != NULL)
8426 {
8427 tga_fd->root.type = bfd_link_hash_indirect;
8428 tga_fd->root.u.i.link = &opt_fd->root;
8429 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8430 opt_fd->mark = 1;
8431 if (opt_fd->dynindx != -1)
8432 {
8433 /* Use __tls_get_addr_opt in dynamic relocations. */
8434 opt_fd->dynindx = -1;
8435 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8436 opt_fd->dynstr_index);
8437 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8438 return NULL;
8439 }
8440 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8441 tga = &htab->tls_get_addr->elf;
8442 if (opt != NULL && tga != NULL)
8443 {
8444 tga->root.type = bfd_link_hash_indirect;
8445 tga->root.u.i.link = &opt->root;
8446 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8447 opt->mark = 1;
8448 _bfd_elf_link_hash_hide_symbol (info, opt,
8449 tga->forced_local);
8450 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8451 }
8452 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8453 htab->tls_get_addr_fd->is_func_descriptor = 1;
8454 if (htab->tls_get_addr != NULL)
8455 {
8456 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8457 htab->tls_get_addr->is_func = 1;
8458 }
8459 }
8460 }
8461 }
8462 else if (htab->params->tls_get_addr_opt < 0)
8463 htab->params->tls_get_addr_opt = 0;
8464 }
8465 return _bfd_elf_tls_setup (info->output_bfd, info);
8466 }
8467
8468 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8469 HASH1 or HASH2. */
8470
8471 static bfd_boolean
8472 branch_reloc_hash_match (const bfd *ibfd,
8473 const Elf_Internal_Rela *rel,
8474 const struct ppc_link_hash_entry *hash1,
8475 const struct ppc_link_hash_entry *hash2)
8476 {
8477 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8478 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8479 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8480
8481 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8482 {
8483 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8484 struct elf_link_hash_entry *h;
8485
8486 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8487 h = elf_follow_link (h);
8488 if (h == &hash1->elf || h == &hash2->elf)
8489 return TRUE;
8490 }
8491 return FALSE;
8492 }
8493
8494 /* Run through all the TLS relocs looking for optimization
8495 opportunities. The linker has been hacked (see ppc64elf.em) to do
8496 a preliminary section layout so that we know the TLS segment
8497 offsets. We can't optimize earlier because some optimizations need
8498 to know the tp offset, and we need to optimize before allocating
8499 dynamic relocations. */
8500
8501 bfd_boolean
8502 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8503 {
8504 bfd *ibfd;
8505 asection *sec;
8506 struct ppc_link_hash_table *htab;
8507 unsigned char *toc_ref;
8508 int pass;
8509
8510 if (!bfd_link_executable (info))
8511 return TRUE;
8512
8513 htab = ppc_hash_table (info);
8514 if (htab == NULL)
8515 return FALSE;
8516
8517 /* Make two passes over the relocs. On the first pass, mark toc
8518 entries involved with tls relocs, and check that tls relocs
8519 involved in setting up a tls_get_addr call are indeed followed by
8520 such a call. If they are not, we can't do any tls optimization.
8521 On the second pass twiddle tls_mask flags to notify
8522 relocate_section that optimization can be done, and adjust got
8523 and plt refcounts. */
8524 toc_ref = NULL;
8525 for (pass = 0; pass < 2; ++pass)
8526 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8527 {
8528 Elf_Internal_Sym *locsyms = NULL;
8529 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8530
8531 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8532 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8533 {
8534 Elf_Internal_Rela *relstart, *rel, *relend;
8535 bfd_boolean found_tls_get_addr_arg = 0;
8536
8537 /* Read the relocations. */
8538 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8539 info->keep_memory);
8540 if (relstart == NULL)
8541 {
8542 free (toc_ref);
8543 return FALSE;
8544 }
8545
8546 relend = relstart + sec->reloc_count;
8547 for (rel = relstart; rel < relend; rel++)
8548 {
8549 enum elf_ppc64_reloc_type r_type;
8550 unsigned long r_symndx;
8551 struct elf_link_hash_entry *h;
8552 Elf_Internal_Sym *sym;
8553 asection *sym_sec;
8554 unsigned char *tls_mask;
8555 unsigned char tls_set, tls_clear, tls_type = 0;
8556 bfd_vma value;
8557 bfd_boolean ok_tprel, is_local;
8558 long toc_ref_index = 0;
8559 int expecting_tls_get_addr = 0;
8560 bfd_boolean ret = FALSE;
8561
8562 r_symndx = ELF64_R_SYM (rel->r_info);
8563 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8564 r_symndx, ibfd))
8565 {
8566 err_free_rel:
8567 if (elf_section_data (sec)->relocs != relstart)
8568 free (relstart);
8569 if (toc_ref != NULL)
8570 free (toc_ref);
8571 if (locsyms != NULL
8572 && (elf_symtab_hdr (ibfd).contents
8573 != (unsigned char *) locsyms))
8574 free (locsyms);
8575 return ret;
8576 }
8577
8578 if (h != NULL)
8579 {
8580 if (h->root.type == bfd_link_hash_defined
8581 || h->root.type == bfd_link_hash_defweak)
8582 value = h->root.u.def.value;
8583 else if (h->root.type == bfd_link_hash_undefweak)
8584 value = 0;
8585 else
8586 {
8587 found_tls_get_addr_arg = 0;
8588 continue;
8589 }
8590 }
8591 else
8592 /* Symbols referenced by TLS relocs must be of type
8593 STT_TLS. So no need for .opd local sym adjust. */
8594 value = sym->st_value;
8595
8596 ok_tprel = FALSE;
8597 is_local = FALSE;
8598 if (h == NULL
8599 || !h->def_dynamic)
8600 {
8601 is_local = TRUE;
8602 if (h != NULL
8603 && h->root.type == bfd_link_hash_undefweak)
8604 ok_tprel = TRUE;
8605 else if (sym_sec != NULL
8606 && sym_sec->output_section != NULL)
8607 {
8608 value += sym_sec->output_offset;
8609 value += sym_sec->output_section->vma;
8610 value -= htab->elf.tls_sec->vma;
8611 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8612 < (bfd_vma) 1 << 32);
8613 }
8614 }
8615
8616 r_type = ELF64_R_TYPE (rel->r_info);
8617 /* If this section has old-style __tls_get_addr calls
8618 without marker relocs, then check that each
8619 __tls_get_addr call reloc is preceded by a reloc
8620 that conceivably belongs to the __tls_get_addr arg
8621 setup insn. If we don't find matching arg setup
8622 relocs, don't do any tls optimization. */
8623 if (pass == 0
8624 && sec->has_tls_get_addr_call
8625 && h != NULL
8626 && (h == &htab->tls_get_addr->elf
8627 || h == &htab->tls_get_addr_fd->elf)
8628 && !found_tls_get_addr_arg
8629 && is_branch_reloc (r_type))
8630 {
8631 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8632 "TLS optimization disabled\n"),
8633 ibfd, sec, rel->r_offset);
8634 ret = TRUE;
8635 goto err_free_rel;
8636 }
8637
8638 found_tls_get_addr_arg = 0;
8639 switch (r_type)
8640 {
8641 case R_PPC64_GOT_TLSLD16:
8642 case R_PPC64_GOT_TLSLD16_LO:
8643 expecting_tls_get_addr = 1;
8644 found_tls_get_addr_arg = 1;
8645 /* Fall through. */
8646
8647 case R_PPC64_GOT_TLSLD16_HI:
8648 case R_PPC64_GOT_TLSLD16_HA:
8649 /* These relocs should never be against a symbol
8650 defined in a shared lib. Leave them alone if
8651 that turns out to be the case. */
8652 if (!is_local)
8653 continue;
8654
8655 /* LD -> LE */
8656 tls_set = 0;
8657 tls_clear = TLS_LD;
8658 tls_type = TLS_TLS | TLS_LD;
8659 break;
8660
8661 case R_PPC64_GOT_TLSGD16:
8662 case R_PPC64_GOT_TLSGD16_LO:
8663 expecting_tls_get_addr = 1;
8664 found_tls_get_addr_arg = 1;
8665 /* Fall through. */
8666
8667 case R_PPC64_GOT_TLSGD16_HI:
8668 case R_PPC64_GOT_TLSGD16_HA:
8669 if (ok_tprel)
8670 /* GD -> LE */
8671 tls_set = 0;
8672 else
8673 /* GD -> IE */
8674 tls_set = TLS_TLS | TLS_TPRELGD;
8675 tls_clear = TLS_GD;
8676 tls_type = TLS_TLS | TLS_GD;
8677 break;
8678
8679 case R_PPC64_GOT_TPREL16_DS:
8680 case R_PPC64_GOT_TPREL16_LO_DS:
8681 case R_PPC64_GOT_TPREL16_HI:
8682 case R_PPC64_GOT_TPREL16_HA:
8683 if (ok_tprel)
8684 {
8685 /* IE -> LE */
8686 tls_set = 0;
8687 tls_clear = TLS_TPREL;
8688 tls_type = TLS_TLS | TLS_TPREL;
8689 break;
8690 }
8691 continue;
8692
8693 case R_PPC64_TLSGD:
8694 case R_PPC64_TLSLD:
8695 found_tls_get_addr_arg = 1;
8696 /* Fall through. */
8697
8698 case R_PPC64_TLS:
8699 case R_PPC64_TOC16:
8700 case R_PPC64_TOC16_LO:
8701 if (sym_sec == NULL || sym_sec != toc)
8702 continue;
8703
8704 /* Mark this toc entry as referenced by a TLS
8705 code sequence. We can do that now in the
8706 case of R_PPC64_TLS, and after checking for
8707 tls_get_addr for the TOC16 relocs. */
8708 if (toc_ref == NULL)
8709 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8710 if (toc_ref == NULL)
8711 goto err_free_rel;
8712
8713 if (h != NULL)
8714 value = h->root.u.def.value;
8715 else
8716 value = sym->st_value;
8717 value += rel->r_addend;
8718 if (value % 8 != 0)
8719 continue;
8720 BFD_ASSERT (value < toc->size
8721 && toc->output_offset % 8 == 0);
8722 toc_ref_index = (value + toc->output_offset) / 8;
8723 if (r_type == R_PPC64_TLS
8724 || r_type == R_PPC64_TLSGD
8725 || r_type == R_PPC64_TLSLD)
8726 {
8727 toc_ref[toc_ref_index] = 1;
8728 continue;
8729 }
8730
8731 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8732 continue;
8733
8734 tls_set = 0;
8735 tls_clear = 0;
8736 expecting_tls_get_addr = 2;
8737 break;
8738
8739 case R_PPC64_TPREL64:
8740 if (pass == 0
8741 || sec != toc
8742 || toc_ref == NULL
8743 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8744 continue;
8745 if (ok_tprel)
8746 {
8747 /* IE -> LE */
8748 tls_set = TLS_EXPLICIT;
8749 tls_clear = TLS_TPREL;
8750 break;
8751 }
8752 continue;
8753
8754 case R_PPC64_DTPMOD64:
8755 if (pass == 0
8756 || sec != toc
8757 || toc_ref == NULL
8758 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8759 continue;
8760 if (rel + 1 < relend
8761 && (rel[1].r_info
8762 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8763 && rel[1].r_offset == rel->r_offset + 8)
8764 {
8765 if (ok_tprel)
8766 /* GD -> LE */
8767 tls_set = TLS_EXPLICIT | TLS_GD;
8768 else
8769 /* GD -> IE */
8770 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8771 tls_clear = TLS_GD;
8772 }
8773 else
8774 {
8775 if (!is_local)
8776 continue;
8777
8778 /* LD -> LE */
8779 tls_set = TLS_EXPLICIT;
8780 tls_clear = TLS_LD;
8781 }
8782 break;
8783
8784 default:
8785 continue;
8786 }
8787
8788 if (pass == 0)
8789 {
8790 if (!expecting_tls_get_addr
8791 || !sec->has_tls_get_addr_call)
8792 continue;
8793
8794 if (rel + 1 < relend
8795 && branch_reloc_hash_match (ibfd, rel + 1,
8796 htab->tls_get_addr,
8797 htab->tls_get_addr_fd))
8798 {
8799 if (expecting_tls_get_addr == 2)
8800 {
8801 /* Check for toc tls entries. */
8802 unsigned char *toc_tls;
8803 int retval;
8804
8805 retval = get_tls_mask (&toc_tls, NULL, NULL,
8806 &locsyms,
8807 rel, ibfd);
8808 if (retval == 0)
8809 goto err_free_rel;
8810 if (toc_tls != NULL)
8811 {
8812 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8813 found_tls_get_addr_arg = 1;
8814 if (retval > 1)
8815 toc_ref[toc_ref_index] = 1;
8816 }
8817 }
8818 continue;
8819 }
8820
8821 if (expecting_tls_get_addr != 1)
8822 continue;
8823
8824 /* Uh oh, we didn't find the expected call. We
8825 could just mark this symbol to exclude it
8826 from tls optimization but it's safer to skip
8827 the entire optimization. */
8828 /* xgettext:c-format */
8829 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8830 "TLS optimization disabled\n"),
8831 ibfd, sec, rel->r_offset);
8832 ret = TRUE;
8833 goto err_free_rel;
8834 }
8835
8836 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8837 {
8838 struct plt_entry *ent;
8839 for (ent = htab->tls_get_addr->elf.plt.plist;
8840 ent != NULL;
8841 ent = ent->next)
8842 if (ent->addend == 0)
8843 {
8844 if (ent->plt.refcount > 0)
8845 {
8846 ent->plt.refcount -= 1;
8847 expecting_tls_get_addr = 0;
8848 }
8849 break;
8850 }
8851 }
8852
8853 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8854 {
8855 struct plt_entry *ent;
8856 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8857 ent != NULL;
8858 ent = ent->next)
8859 if (ent->addend == 0)
8860 {
8861 if (ent->plt.refcount > 0)
8862 ent->plt.refcount -= 1;
8863 break;
8864 }
8865 }
8866
8867 if (tls_clear == 0)
8868 continue;
8869
8870 if ((tls_set & TLS_EXPLICIT) == 0)
8871 {
8872 struct got_entry *ent;
8873
8874 /* Adjust got entry for this reloc. */
8875 if (h != NULL)
8876 ent = h->got.glist;
8877 else
8878 ent = elf_local_got_ents (ibfd)[r_symndx];
8879
8880 for (; ent != NULL; ent = ent->next)
8881 if (ent->addend == rel->r_addend
8882 && ent->owner == ibfd
8883 && ent->tls_type == tls_type)
8884 break;
8885 if (ent == NULL)
8886 abort ();
8887
8888 if (tls_set == 0)
8889 {
8890 /* We managed to get rid of a got entry. */
8891 if (ent->got.refcount > 0)
8892 ent->got.refcount -= 1;
8893 }
8894 }
8895 else
8896 {
8897 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8898 we'll lose one or two dyn relocs. */
8899 if (!dec_dynrel_count (rel->r_info, sec, info,
8900 NULL, h, sym))
8901 return FALSE;
8902
8903 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8904 {
8905 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8906 NULL, h, sym))
8907 return FALSE;
8908 }
8909 }
8910
8911 *tls_mask |= tls_set;
8912 *tls_mask &= ~tls_clear;
8913 }
8914
8915 if (elf_section_data (sec)->relocs != relstart)
8916 free (relstart);
8917 }
8918
8919 if (locsyms != NULL
8920 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8921 {
8922 if (!info->keep_memory)
8923 free (locsyms);
8924 else
8925 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8926 }
8927 }
8928
8929 if (toc_ref != NULL)
8930 free (toc_ref);
8931 htab->do_tls_opt = 1;
8932 return TRUE;
8933 }
8934
8935 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8936 the values of any global symbols in a toc section that has been
8937 edited. Globals in toc sections should be a rarity, so this function
8938 sets a flag if any are found in toc sections other than the one just
8939 edited, so that further hash table traversals can be avoided. */
8940
8941 struct adjust_toc_info
8942 {
8943 asection *toc;
8944 unsigned long *skip;
8945 bfd_boolean global_toc_syms;
8946 };
8947
8948 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8949
8950 static bfd_boolean
8951 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8952 {
8953 struct ppc_link_hash_entry *eh;
8954 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8955 unsigned long i;
8956
8957 if (h->root.type != bfd_link_hash_defined
8958 && h->root.type != bfd_link_hash_defweak)
8959 return TRUE;
8960
8961 eh = (struct ppc_link_hash_entry *) h;
8962 if (eh->adjust_done)
8963 return TRUE;
8964
8965 if (eh->elf.root.u.def.section == toc_inf->toc)
8966 {
8967 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8968 i = toc_inf->toc->rawsize >> 3;
8969 else
8970 i = eh->elf.root.u.def.value >> 3;
8971
8972 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8973 {
8974 _bfd_error_handler
8975 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8976 do
8977 ++i;
8978 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8979 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8980 }
8981
8982 eh->elf.root.u.def.value -= toc_inf->skip[i];
8983 eh->adjust_done = 1;
8984 }
8985 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8986 toc_inf->global_toc_syms = TRUE;
8987
8988 return TRUE;
8989 }
8990
8991 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8992 on a _LO variety toc/got reloc. */
8993
8994 static bfd_boolean
8995 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8996 {
8997 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8998 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8999 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
9000 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
9001 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
9002 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
9003 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
9004 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
9005 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
9006 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
9007 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
9008 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
9009 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
9010 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
9011 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
9012 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
9013 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
9014 /* Exclude lfqu by testing reloc. If relocs are ever
9015 defined for the reduced D field in psq_lu then those
9016 will need testing too. */
9017 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9018 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
9019 && (insn & 1) == 0)
9020 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
9021 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
9022 /* Exclude stfqu. psq_stu as above for psq_lu. */
9023 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9024 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
9025 && (insn & 1) == 0));
9026 }
9027
9028 /* Examine all relocs referencing .toc sections in order to remove
9029 unused .toc entries. */
9030
9031 bfd_boolean
9032 ppc64_elf_edit_toc (struct bfd_link_info *info)
9033 {
9034 bfd *ibfd;
9035 struct adjust_toc_info toc_inf;
9036 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9037
9038 htab->do_toc_opt = 1;
9039 toc_inf.global_toc_syms = TRUE;
9040 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9041 {
9042 asection *toc, *sec;
9043 Elf_Internal_Shdr *symtab_hdr;
9044 Elf_Internal_Sym *local_syms;
9045 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9046 unsigned long *skip, *drop;
9047 unsigned char *used;
9048 unsigned char *keep, last, some_unused;
9049
9050 if (!is_ppc64_elf (ibfd))
9051 continue;
9052
9053 toc = bfd_get_section_by_name (ibfd, ".toc");
9054 if (toc == NULL
9055 || toc->size == 0
9056 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9057 || discarded_section (toc))
9058 continue;
9059
9060 toc_relocs = NULL;
9061 local_syms = NULL;
9062 symtab_hdr = &elf_symtab_hdr (ibfd);
9063
9064 /* Look at sections dropped from the final link. */
9065 skip = NULL;
9066 relstart = NULL;
9067 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9068 {
9069 if (sec->reloc_count == 0
9070 || !discarded_section (sec)
9071 || get_opd_info (sec)
9072 || (sec->flags & SEC_ALLOC) == 0
9073 || (sec->flags & SEC_DEBUGGING) != 0)
9074 continue;
9075
9076 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9077 if (relstart == NULL)
9078 goto error_ret;
9079
9080 /* Run through the relocs to see which toc entries might be
9081 unused. */
9082 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9083 {
9084 enum elf_ppc64_reloc_type r_type;
9085 unsigned long r_symndx;
9086 asection *sym_sec;
9087 struct elf_link_hash_entry *h;
9088 Elf_Internal_Sym *sym;
9089 bfd_vma val;
9090
9091 r_type = ELF64_R_TYPE (rel->r_info);
9092 switch (r_type)
9093 {
9094 default:
9095 continue;
9096
9097 case R_PPC64_TOC16:
9098 case R_PPC64_TOC16_LO:
9099 case R_PPC64_TOC16_HI:
9100 case R_PPC64_TOC16_HA:
9101 case R_PPC64_TOC16_DS:
9102 case R_PPC64_TOC16_LO_DS:
9103 break;
9104 }
9105
9106 r_symndx = ELF64_R_SYM (rel->r_info);
9107 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9108 r_symndx, ibfd))
9109 goto error_ret;
9110
9111 if (sym_sec != toc)
9112 continue;
9113
9114 if (h != NULL)
9115 val = h->root.u.def.value;
9116 else
9117 val = sym->st_value;
9118 val += rel->r_addend;
9119
9120 if (val >= toc->size)
9121 continue;
9122
9123 /* Anything in the toc ought to be aligned to 8 bytes.
9124 If not, don't mark as unused. */
9125 if (val & 7)
9126 continue;
9127
9128 if (skip == NULL)
9129 {
9130 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9131 if (skip == NULL)
9132 goto error_ret;
9133 }
9134
9135 skip[val >> 3] = ref_from_discarded;
9136 }
9137
9138 if (elf_section_data (sec)->relocs != relstart)
9139 free (relstart);
9140 }
9141
9142 /* For largetoc loads of address constants, we can convert
9143 . addis rx,2,addr@got@ha
9144 . ld ry,addr@got@l(rx)
9145 to
9146 . addis rx,2,addr@toc@ha
9147 . addi ry,rx,addr@toc@l
9148 when addr is within 2G of the toc pointer. This then means
9149 that the word storing "addr" in the toc is no longer needed. */
9150
9151 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9152 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9153 && toc->reloc_count != 0)
9154 {
9155 /* Read toc relocs. */
9156 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9157 info->keep_memory);
9158 if (toc_relocs == NULL)
9159 goto error_ret;
9160
9161 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9162 {
9163 enum elf_ppc64_reloc_type r_type;
9164 unsigned long r_symndx;
9165 asection *sym_sec;
9166 struct elf_link_hash_entry *h;
9167 Elf_Internal_Sym *sym;
9168 bfd_vma val, addr;
9169
9170 r_type = ELF64_R_TYPE (rel->r_info);
9171 if (r_type != R_PPC64_ADDR64)
9172 continue;
9173
9174 r_symndx = ELF64_R_SYM (rel->r_info);
9175 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9176 r_symndx, ibfd))
9177 goto error_ret;
9178
9179 if (sym_sec == NULL
9180 || sym_sec->output_section == NULL
9181 || discarded_section (sym_sec))
9182 continue;
9183
9184 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9185 continue;
9186
9187 if (h != NULL)
9188 {
9189 if (h->type == STT_GNU_IFUNC)
9190 continue;
9191 val = h->root.u.def.value;
9192 }
9193 else
9194 {
9195 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9196 continue;
9197 val = sym->st_value;
9198 }
9199 val += rel->r_addend;
9200 val += sym_sec->output_section->vma + sym_sec->output_offset;
9201
9202 /* We don't yet know the exact toc pointer value, but we
9203 know it will be somewhere in the toc section. Don't
9204 optimize if the difference from any possible toc
9205 pointer is outside [ff..f80008000, 7fff7fff]. */
9206 addr = toc->output_section->vma + TOC_BASE_OFF;
9207 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9208 continue;
9209
9210 addr = toc->output_section->vma + toc->output_section->rawsize;
9211 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9212 continue;
9213
9214 if (skip == NULL)
9215 {
9216 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9217 if (skip == NULL)
9218 goto error_ret;
9219 }
9220
9221 skip[rel->r_offset >> 3]
9222 |= can_optimize | ((rel - toc_relocs) << 2);
9223 }
9224 }
9225
9226 if (skip == NULL)
9227 continue;
9228
9229 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9230 if (used == NULL)
9231 {
9232 error_ret:
9233 if (local_syms != NULL
9234 && symtab_hdr->contents != (unsigned char *) local_syms)
9235 free (local_syms);
9236 if (sec != NULL
9237 && relstart != NULL
9238 && elf_section_data (sec)->relocs != relstart)
9239 free (relstart);
9240 if (toc_relocs != NULL
9241 && elf_section_data (toc)->relocs != toc_relocs)
9242 free (toc_relocs);
9243 if (skip != NULL)
9244 free (skip);
9245 return FALSE;
9246 }
9247
9248 /* Now check all kept sections that might reference the toc.
9249 Check the toc itself last. */
9250 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9251 : ibfd->sections);
9252 sec != NULL;
9253 sec = (sec == toc ? NULL
9254 : sec->next == NULL ? toc
9255 : sec->next == toc && toc->next ? toc->next
9256 : sec->next))
9257 {
9258 int repeat;
9259
9260 if (sec->reloc_count == 0
9261 || discarded_section (sec)
9262 || get_opd_info (sec)
9263 || (sec->flags & SEC_ALLOC) == 0
9264 || (sec->flags & SEC_DEBUGGING) != 0)
9265 continue;
9266
9267 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9268 info->keep_memory);
9269 if (relstart == NULL)
9270 {
9271 free (used);
9272 goto error_ret;
9273 }
9274
9275 /* Mark toc entries referenced as used. */
9276 do
9277 {
9278 repeat = 0;
9279 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9280 {
9281 enum elf_ppc64_reloc_type r_type;
9282 unsigned long r_symndx;
9283 asection *sym_sec;
9284 struct elf_link_hash_entry *h;
9285 Elf_Internal_Sym *sym;
9286 bfd_vma val;
9287 enum {no_check, check_lo, check_ha} insn_check;
9288
9289 r_type = ELF64_R_TYPE (rel->r_info);
9290 switch (r_type)
9291 {
9292 default:
9293 insn_check = no_check;
9294 break;
9295
9296 case R_PPC64_GOT_TLSLD16_HA:
9297 case R_PPC64_GOT_TLSGD16_HA:
9298 case R_PPC64_GOT_TPREL16_HA:
9299 case R_PPC64_GOT_DTPREL16_HA:
9300 case R_PPC64_GOT16_HA:
9301 case R_PPC64_TOC16_HA:
9302 insn_check = check_ha;
9303 break;
9304
9305 case R_PPC64_GOT_TLSLD16_LO:
9306 case R_PPC64_GOT_TLSGD16_LO:
9307 case R_PPC64_GOT_TPREL16_LO_DS:
9308 case R_PPC64_GOT_DTPREL16_LO_DS:
9309 case R_PPC64_GOT16_LO:
9310 case R_PPC64_GOT16_LO_DS:
9311 case R_PPC64_TOC16_LO:
9312 case R_PPC64_TOC16_LO_DS:
9313 insn_check = check_lo;
9314 break;
9315 }
9316
9317 if (insn_check != no_check)
9318 {
9319 bfd_vma off = rel->r_offset & ~3;
9320 unsigned char buf[4];
9321 unsigned int insn;
9322
9323 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9324 {
9325 free (used);
9326 goto error_ret;
9327 }
9328 insn = bfd_get_32 (ibfd, buf);
9329 if (insn_check == check_lo
9330 ? !ok_lo_toc_insn (insn, r_type)
9331 : ((insn & ((0x3f << 26) | 0x1f << 16))
9332 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9333 {
9334 char str[12];
9335
9336 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9337 sprintf (str, "%#08x", insn);
9338 info->callbacks->einfo
9339 /* xgettext:c-format */
9340 (_("%H: toc optimization is not supported for"
9341 " %s instruction.\n"),
9342 ibfd, sec, rel->r_offset & ~3, str);
9343 }
9344 }
9345
9346 switch (r_type)
9347 {
9348 case R_PPC64_TOC16:
9349 case R_PPC64_TOC16_LO:
9350 case R_PPC64_TOC16_HI:
9351 case R_PPC64_TOC16_HA:
9352 case R_PPC64_TOC16_DS:
9353 case R_PPC64_TOC16_LO_DS:
9354 /* In case we're taking addresses of toc entries. */
9355 case R_PPC64_ADDR64:
9356 break;
9357
9358 default:
9359 continue;
9360 }
9361
9362 r_symndx = ELF64_R_SYM (rel->r_info);
9363 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9364 r_symndx, ibfd))
9365 {
9366 free (used);
9367 goto error_ret;
9368 }
9369
9370 if (sym_sec != toc)
9371 continue;
9372
9373 if (h != NULL)
9374 val = h->root.u.def.value;
9375 else
9376 val = sym->st_value;
9377 val += rel->r_addend;
9378
9379 if (val >= toc->size)
9380 continue;
9381
9382 if ((skip[val >> 3] & can_optimize) != 0)
9383 {
9384 bfd_vma off;
9385 unsigned char opc;
9386
9387 switch (r_type)
9388 {
9389 case R_PPC64_TOC16_HA:
9390 break;
9391
9392 case R_PPC64_TOC16_LO_DS:
9393 off = rel->r_offset;
9394 off += (bfd_big_endian (ibfd) ? -2 : 3);
9395 if (!bfd_get_section_contents (ibfd, sec, &opc,
9396 off, 1))
9397 {
9398 free (used);
9399 goto error_ret;
9400 }
9401 if ((opc & (0x3f << 2)) == (58u << 2))
9402 break;
9403 /* Fall through. */
9404
9405 default:
9406 /* Wrong sort of reloc, or not a ld. We may
9407 as well clear ref_from_discarded too. */
9408 skip[val >> 3] = 0;
9409 }
9410 }
9411
9412 if (sec != toc)
9413 used[val >> 3] = 1;
9414 /* For the toc section, we only mark as used if this
9415 entry itself isn't unused. */
9416 else if ((used[rel->r_offset >> 3]
9417 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9418 && !used[val >> 3])
9419 {
9420 /* Do all the relocs again, to catch reference
9421 chains. */
9422 repeat = 1;
9423 used[val >> 3] = 1;
9424 }
9425 }
9426 }
9427 while (repeat);
9428
9429 if (elf_section_data (sec)->relocs != relstart)
9430 free (relstart);
9431 }
9432
9433 /* Merge the used and skip arrays. Assume that TOC
9434 doublewords not appearing as either used or unused belong
9435 to an entry more than one doubleword in size. */
9436 for (drop = skip, keep = used, last = 0, some_unused = 0;
9437 drop < skip + (toc->size + 7) / 8;
9438 ++drop, ++keep)
9439 {
9440 if (*keep)
9441 {
9442 *drop &= ~ref_from_discarded;
9443 if ((*drop & can_optimize) != 0)
9444 some_unused = 1;
9445 last = 0;
9446 }
9447 else if ((*drop & ref_from_discarded) != 0)
9448 {
9449 some_unused = 1;
9450 last = ref_from_discarded;
9451 }
9452 else
9453 *drop = last;
9454 }
9455
9456 free (used);
9457
9458 if (some_unused)
9459 {
9460 bfd_byte *contents, *src;
9461 unsigned long off;
9462 Elf_Internal_Sym *sym;
9463 bfd_boolean local_toc_syms = FALSE;
9464
9465 /* Shuffle the toc contents, and at the same time convert the
9466 skip array from booleans into offsets. */
9467 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9468 goto error_ret;
9469
9470 elf_section_data (toc)->this_hdr.contents = contents;
9471
9472 for (src = contents, off = 0, drop = skip;
9473 src < contents + toc->size;
9474 src += 8, ++drop)
9475 {
9476 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9477 off += 8;
9478 else if (off != 0)
9479 {
9480 *drop = off;
9481 memcpy (src - off, src, 8);
9482 }
9483 }
9484 *drop = off;
9485 toc->rawsize = toc->size;
9486 toc->size = src - contents - off;
9487
9488 /* Adjust addends for relocs against the toc section sym,
9489 and optimize any accesses we can. */
9490 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9491 {
9492 if (sec->reloc_count == 0
9493 || discarded_section (sec))
9494 continue;
9495
9496 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9497 info->keep_memory);
9498 if (relstart == NULL)
9499 goto error_ret;
9500
9501 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9502 {
9503 enum elf_ppc64_reloc_type r_type;
9504 unsigned long r_symndx;
9505 asection *sym_sec;
9506 struct elf_link_hash_entry *h;
9507 bfd_vma val;
9508
9509 r_type = ELF64_R_TYPE (rel->r_info);
9510 switch (r_type)
9511 {
9512 default:
9513 continue;
9514
9515 case R_PPC64_TOC16:
9516 case R_PPC64_TOC16_LO:
9517 case R_PPC64_TOC16_HI:
9518 case R_PPC64_TOC16_HA:
9519 case R_PPC64_TOC16_DS:
9520 case R_PPC64_TOC16_LO_DS:
9521 case R_PPC64_ADDR64:
9522 break;
9523 }
9524
9525 r_symndx = ELF64_R_SYM (rel->r_info);
9526 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9527 r_symndx, ibfd))
9528 goto error_ret;
9529
9530 if (sym_sec != toc)
9531 continue;
9532
9533 if (h != NULL)
9534 val = h->root.u.def.value;
9535 else
9536 {
9537 val = sym->st_value;
9538 if (val != 0)
9539 local_toc_syms = TRUE;
9540 }
9541
9542 val += rel->r_addend;
9543
9544 if (val > toc->rawsize)
9545 val = toc->rawsize;
9546 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9547 continue;
9548 else if ((skip[val >> 3] & can_optimize) != 0)
9549 {
9550 Elf_Internal_Rela *tocrel
9551 = toc_relocs + (skip[val >> 3] >> 2);
9552 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9553
9554 switch (r_type)
9555 {
9556 case R_PPC64_TOC16_HA:
9557 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9558 break;
9559
9560 case R_PPC64_TOC16_LO_DS:
9561 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9562 break;
9563
9564 default:
9565 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9566 ppc_howto_init ();
9567 info->callbacks->einfo
9568 /* xgettext:c-format */
9569 (_("%H: %s references "
9570 "optimized away TOC entry\n"),
9571 ibfd, sec, rel->r_offset,
9572 ppc64_elf_howto_table[r_type]->name);
9573 bfd_set_error (bfd_error_bad_value);
9574 goto error_ret;
9575 }
9576 rel->r_addend = tocrel->r_addend;
9577 elf_section_data (sec)->relocs = relstart;
9578 continue;
9579 }
9580
9581 if (h != NULL || sym->st_value != 0)
9582 continue;
9583
9584 rel->r_addend -= skip[val >> 3];
9585 elf_section_data (sec)->relocs = relstart;
9586 }
9587
9588 if (elf_section_data (sec)->relocs != relstart)
9589 free (relstart);
9590 }
9591
9592 /* We shouldn't have local or global symbols defined in the TOC,
9593 but handle them anyway. */
9594 if (local_syms != NULL)
9595 for (sym = local_syms;
9596 sym < local_syms + symtab_hdr->sh_info;
9597 ++sym)
9598 if (sym->st_value != 0
9599 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9600 {
9601 unsigned long i;
9602
9603 if (sym->st_value > toc->rawsize)
9604 i = toc->rawsize >> 3;
9605 else
9606 i = sym->st_value >> 3;
9607
9608 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9609 {
9610 if (local_toc_syms)
9611 _bfd_error_handler
9612 (_("%s defined on removed toc entry"),
9613 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9614 do
9615 ++i;
9616 while ((skip[i] & (ref_from_discarded | can_optimize)));
9617 sym->st_value = (bfd_vma) i << 3;
9618 }
9619
9620 sym->st_value -= skip[i];
9621 symtab_hdr->contents = (unsigned char *) local_syms;
9622 }
9623
9624 /* Adjust any global syms defined in this toc input section. */
9625 if (toc_inf.global_toc_syms)
9626 {
9627 toc_inf.toc = toc;
9628 toc_inf.skip = skip;
9629 toc_inf.global_toc_syms = FALSE;
9630 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9631 &toc_inf);
9632 }
9633
9634 if (toc->reloc_count != 0)
9635 {
9636 Elf_Internal_Shdr *rel_hdr;
9637 Elf_Internal_Rela *wrel;
9638 bfd_size_type sz;
9639
9640 /* Remove unused toc relocs, and adjust those we keep. */
9641 if (toc_relocs == NULL)
9642 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9643 info->keep_memory);
9644 if (toc_relocs == NULL)
9645 goto error_ret;
9646
9647 wrel = toc_relocs;
9648 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9649 if ((skip[rel->r_offset >> 3]
9650 & (ref_from_discarded | can_optimize)) == 0)
9651 {
9652 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9653 wrel->r_info = rel->r_info;
9654 wrel->r_addend = rel->r_addend;
9655 ++wrel;
9656 }
9657 else if (!dec_dynrel_count (rel->r_info, toc, info,
9658 &local_syms, NULL, NULL))
9659 goto error_ret;
9660
9661 elf_section_data (toc)->relocs = toc_relocs;
9662 toc->reloc_count = wrel - toc_relocs;
9663 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9664 sz = rel_hdr->sh_entsize;
9665 rel_hdr->sh_size = toc->reloc_count * sz;
9666 }
9667 }
9668 else if (toc_relocs != NULL
9669 && elf_section_data (toc)->relocs != toc_relocs)
9670 free (toc_relocs);
9671
9672 if (local_syms != NULL
9673 && symtab_hdr->contents != (unsigned char *) local_syms)
9674 {
9675 if (!info->keep_memory)
9676 free (local_syms);
9677 else
9678 symtab_hdr->contents = (unsigned char *) local_syms;
9679 }
9680 free (skip);
9681 }
9682
9683 return TRUE;
9684 }
9685
9686 /* Return true iff input section I references the TOC using
9687 instructions limited to +/-32k offsets. */
9688
9689 bfd_boolean
9690 ppc64_elf_has_small_toc_reloc (asection *i)
9691 {
9692 return (is_ppc64_elf (i->owner)
9693 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9694 }
9695
9696 /* Allocate space for one GOT entry. */
9697
9698 static void
9699 allocate_got (struct elf_link_hash_entry *h,
9700 struct bfd_link_info *info,
9701 struct got_entry *gent)
9702 {
9703 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9704 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9705 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9706 ? 16 : 8);
9707 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9708 ? 2 : 1) * sizeof (Elf64_External_Rela);
9709 asection *got = ppc64_elf_tdata (gent->owner)->got;
9710
9711 gent->got.offset = got->size;
9712 got->size += entsize;
9713
9714 if (h->type == STT_GNU_IFUNC)
9715 {
9716 htab->elf.irelplt->size += rentsize;
9717 htab->got_reli_size += rentsize;
9718 }
9719 else if ((bfd_link_pic (info)
9720 || (htab->elf.dynamic_sections_created
9721 && h->dynindx != -1
9722 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9723 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9724 {
9725 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9726 relgot->size += rentsize;
9727 }
9728 }
9729
9730 /* This function merges got entries in the same toc group. */
9731
9732 static void
9733 merge_got_entries (struct got_entry **pent)
9734 {
9735 struct got_entry *ent, *ent2;
9736
9737 for (ent = *pent; ent != NULL; ent = ent->next)
9738 if (!ent->is_indirect)
9739 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9740 if (!ent2->is_indirect
9741 && ent2->addend == ent->addend
9742 && ent2->tls_type == ent->tls_type
9743 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9744 {
9745 ent2->is_indirect = TRUE;
9746 ent2->got.ent = ent;
9747 }
9748 }
9749
9750 /* If H is undefined, make it dynamic if that makes sense. */
9751
9752 static bfd_boolean
9753 ensure_undef_dynamic (struct bfd_link_info *info,
9754 struct elf_link_hash_entry *h)
9755 {
9756 struct elf_link_hash_table *htab = elf_hash_table (info);
9757
9758 if (htab->dynamic_sections_created
9759 && ((info->dynamic_undefined_weak != 0
9760 && h->root.type == bfd_link_hash_undefweak)
9761 || h->root.type == bfd_link_hash_undefined)
9762 && h->dynindx == -1
9763 && !h->forced_local
9764 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9765 return bfd_elf_link_record_dynamic_symbol (info, h);
9766 return TRUE;
9767 }
9768
9769 /* Allocate space in .plt, .got and associated reloc sections for
9770 dynamic relocs. */
9771
9772 static bfd_boolean
9773 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9774 {
9775 struct bfd_link_info *info;
9776 struct ppc_link_hash_table *htab;
9777 asection *s;
9778 struct ppc_link_hash_entry *eh;
9779 struct got_entry **pgent, *gent;
9780
9781 if (h->root.type == bfd_link_hash_indirect)
9782 return TRUE;
9783
9784 info = (struct bfd_link_info *) inf;
9785 htab = ppc_hash_table (info);
9786 if (htab == NULL)
9787 return FALSE;
9788
9789 eh = (struct ppc_link_hash_entry *) h;
9790 /* Run through the TLS GD got entries first if we're changing them
9791 to TPREL. */
9792 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9793 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9794 if (gent->got.refcount > 0
9795 && (gent->tls_type & TLS_GD) != 0)
9796 {
9797 /* This was a GD entry that has been converted to TPREL. If
9798 there happens to be a TPREL entry we can use that one. */
9799 struct got_entry *ent;
9800 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9801 if (ent->got.refcount > 0
9802 && (ent->tls_type & TLS_TPREL) != 0
9803 && ent->addend == gent->addend
9804 && ent->owner == gent->owner)
9805 {
9806 gent->got.refcount = 0;
9807 break;
9808 }
9809
9810 /* If not, then we'll be using our own TPREL entry. */
9811 if (gent->got.refcount != 0)
9812 gent->tls_type = TLS_TLS | TLS_TPREL;
9813 }
9814
9815 /* Remove any list entry that won't generate a word in the GOT before
9816 we call merge_got_entries. Otherwise we risk merging to empty
9817 entries. */
9818 pgent = &h->got.glist;
9819 while ((gent = *pgent) != NULL)
9820 if (gent->got.refcount > 0)
9821 {
9822 if ((gent->tls_type & TLS_LD) != 0
9823 && !h->def_dynamic)
9824 {
9825 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9826 *pgent = gent->next;
9827 }
9828 else
9829 pgent = &gent->next;
9830 }
9831 else
9832 *pgent = gent->next;
9833
9834 if (!htab->do_multi_toc)
9835 merge_got_entries (&h->got.glist);
9836
9837 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9838 if (!gent->is_indirect)
9839 {
9840 /* Make sure this symbol is output as a dynamic symbol. */
9841 if (!ensure_undef_dynamic (info, h))
9842 return FALSE;
9843
9844 if (!is_ppc64_elf (gent->owner))
9845 abort ();
9846
9847 allocate_got (h, info, gent);
9848 }
9849
9850 /* If no dynamic sections we can't have dynamic relocs, except for
9851 IFUNCs which are handled even in static executables. */
9852 if (!htab->elf.dynamic_sections_created
9853 && h->type != STT_GNU_IFUNC)
9854 eh->dyn_relocs = NULL;
9855
9856 /* Also discard relocs on undefined weak syms with non-default
9857 visibility, or when dynamic_undefined_weak says so. */
9858 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9859 eh->dyn_relocs = NULL;
9860
9861 if (eh->dyn_relocs != NULL)
9862 {
9863 struct elf_dyn_relocs *p, **pp;
9864
9865 /* In the shared -Bsymbolic case, discard space allocated for
9866 dynamic pc-relative relocs against symbols which turn out to
9867 be defined in regular objects. For the normal shared case,
9868 discard space for relocs that have become local due to symbol
9869 visibility changes. */
9870
9871 if (bfd_link_pic (info))
9872 {
9873 /* Relocs that use pc_count are those that appear on a call
9874 insn, or certain REL relocs (see must_be_dyn_reloc) that
9875 can be generated via assembly. We want calls to
9876 protected symbols to resolve directly to the function
9877 rather than going via the plt. If people want function
9878 pointer comparisons to work as expected then they should
9879 avoid writing weird assembly. */
9880 if (SYMBOL_CALLS_LOCAL (info, h))
9881 {
9882 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9883 {
9884 p->count -= p->pc_count;
9885 p->pc_count = 0;
9886 if (p->count == 0)
9887 *pp = p->next;
9888 else
9889 pp = &p->next;
9890 }
9891 }
9892
9893 if (eh->dyn_relocs != NULL)
9894 {
9895 /* Make sure this symbol is output as a dynamic symbol. */
9896 if (!ensure_undef_dynamic (info, h))
9897 return FALSE;
9898 }
9899 }
9900 else if (h->type == STT_GNU_IFUNC)
9901 {
9902 /* A plt entry is always created when making direct calls to
9903 an ifunc, even when building a static executable, but
9904 that doesn't cover all cases. We may have only an ifunc
9905 initialised function pointer for a given ifunc symbol.
9906
9907 For ELFv2, dynamic relocations are not required when
9908 generating a global entry PLT stub. */
9909 if (abiversion (info->output_bfd) >= 2)
9910 {
9911 if (global_entry_stub (h))
9912 eh->dyn_relocs = NULL;
9913 }
9914
9915 /* For ELFv1 we have function descriptors. Descriptors need
9916 to be treated like PLT entries and thus have dynamic
9917 relocations. One exception is when the function
9918 descriptor is copied into .dynbss (which should only
9919 happen with ancient versions of gcc). */
9920 else if (h->needs_copy)
9921 eh->dyn_relocs = NULL;
9922 }
9923 else if (ELIMINATE_COPY_RELOCS)
9924 {
9925 /* For the non-pic case, discard space for relocs against
9926 symbols which turn out to need copy relocs or are not
9927 dynamic. */
9928 if (!h->non_got_ref
9929 && !h->def_regular)
9930 {
9931 /* Make sure this symbol is output as a dynamic symbol. */
9932 if (!ensure_undef_dynamic (info, h))
9933 return FALSE;
9934
9935 if (h->dynindx == -1)
9936 eh->dyn_relocs = NULL;
9937 }
9938 else
9939 eh->dyn_relocs = NULL;
9940 }
9941
9942 /* Finally, allocate space. */
9943 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9944 {
9945 asection *sreloc = elf_section_data (p->sec)->sreloc;
9946 if (eh->elf.type == STT_GNU_IFUNC)
9947 sreloc = htab->elf.irelplt;
9948 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9949 }
9950 }
9951
9952 if ((htab->elf.dynamic_sections_created
9953 && h->dynindx != -1)
9954 || h->type == STT_GNU_IFUNC)
9955 {
9956 struct plt_entry *pent;
9957 bfd_boolean doneone = FALSE;
9958 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9959 if (pent->plt.refcount > 0)
9960 {
9961 if (!htab->elf.dynamic_sections_created
9962 || h->dynindx == -1)
9963 {
9964 s = htab->elf.iplt;
9965 pent->plt.offset = s->size;
9966 s->size += PLT_ENTRY_SIZE (htab);
9967 s = htab->elf.irelplt;
9968 }
9969 else
9970 {
9971 /* If this is the first .plt entry, make room for the special
9972 first entry. */
9973 s = htab->elf.splt;
9974 if (s->size == 0)
9975 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9976
9977 pent->plt.offset = s->size;
9978
9979 /* Make room for this entry. */
9980 s->size += PLT_ENTRY_SIZE (htab);
9981
9982 /* Make room for the .glink code. */
9983 s = htab->glink;
9984 if (s->size == 0)
9985 s->size += GLINK_CALL_STUB_SIZE;
9986 if (htab->opd_abi)
9987 {
9988 /* We need bigger stubs past index 32767. */
9989 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9990 s->size += 4;
9991 s->size += 2*4;
9992 }
9993 else
9994 s->size += 4;
9995
9996 /* We also need to make an entry in the .rela.plt section. */
9997 s = htab->elf.srelplt;
9998 }
9999 s->size += sizeof (Elf64_External_Rela);
10000 doneone = TRUE;
10001 }
10002 else
10003 pent->plt.offset = (bfd_vma) -1;
10004 if (!doneone)
10005 {
10006 h->plt.plist = NULL;
10007 h->needs_plt = 0;
10008 }
10009 }
10010 else
10011 {
10012 h->plt.plist = NULL;
10013 h->needs_plt = 0;
10014 }
10015
10016 return TRUE;
10017 }
10018
10019 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
10020 to set up space for global entry stubs. These are put in glink,
10021 after the branch table. */
10022
10023 static bfd_boolean
10024 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
10025 {
10026 struct bfd_link_info *info;
10027 struct ppc_link_hash_table *htab;
10028 struct plt_entry *pent;
10029 asection *s;
10030
10031 if (h->root.type == bfd_link_hash_indirect)
10032 return TRUE;
10033
10034 if (!h->pointer_equality_needed)
10035 return TRUE;
10036
10037 if (h->def_regular)
10038 return TRUE;
10039
10040 info = inf;
10041 htab = ppc_hash_table (info);
10042 if (htab == NULL)
10043 return FALSE;
10044
10045 s = htab->glink;
10046 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10047 if (pent->plt.offset != (bfd_vma) -1
10048 && pent->addend == 0)
10049 {
10050 /* For ELFv2, if this symbol is not defined in a regular file
10051 and we are not generating a shared library or pie, then we
10052 need to define the symbol in the executable on a call stub.
10053 This is to avoid text relocations. */
10054 s->size = (s->size + 15) & -16;
10055 h->root.type = bfd_link_hash_defined;
10056 h->root.u.def.section = s;
10057 h->root.u.def.value = s->size;
10058 s->size += 16;
10059 break;
10060 }
10061 return TRUE;
10062 }
10063
10064 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10065 read-only sections. */
10066
10067 static bfd_boolean
10068 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10069 {
10070 if (h->root.type == bfd_link_hash_indirect)
10071 return TRUE;
10072
10073 if (readonly_dynrelocs (h))
10074 {
10075 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10076
10077 /* Not an error, just cut short the traversal. */
10078 return FALSE;
10079 }
10080 return TRUE;
10081 }
10082
10083 /* Set the sizes of the dynamic sections. */
10084
10085 static bfd_boolean
10086 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10087 struct bfd_link_info *info)
10088 {
10089 struct ppc_link_hash_table *htab;
10090 bfd *dynobj;
10091 asection *s;
10092 bfd_boolean relocs;
10093 bfd *ibfd;
10094 struct got_entry *first_tlsld;
10095
10096 htab = ppc_hash_table (info);
10097 if (htab == NULL)
10098 return FALSE;
10099
10100 dynobj = htab->elf.dynobj;
10101 if (dynobj == NULL)
10102 abort ();
10103
10104 if (htab->elf.dynamic_sections_created)
10105 {
10106 /* Set the contents of the .interp section to the interpreter. */
10107 if (bfd_link_executable (info) && !info->nointerp)
10108 {
10109 s = bfd_get_linker_section (dynobj, ".interp");
10110 if (s == NULL)
10111 abort ();
10112 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10113 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10114 }
10115 }
10116
10117 /* Set up .got offsets for local syms, and space for local dynamic
10118 relocs. */
10119 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10120 {
10121 struct got_entry **lgot_ents;
10122 struct got_entry **end_lgot_ents;
10123 struct plt_entry **local_plt;
10124 struct plt_entry **end_local_plt;
10125 unsigned char *lgot_masks;
10126 bfd_size_type locsymcount;
10127 Elf_Internal_Shdr *symtab_hdr;
10128
10129 if (!is_ppc64_elf (ibfd))
10130 continue;
10131
10132 for (s = ibfd->sections; s != NULL; s = s->next)
10133 {
10134 struct ppc_dyn_relocs *p;
10135
10136 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10137 {
10138 if (!bfd_is_abs_section (p->sec)
10139 && bfd_is_abs_section (p->sec->output_section))
10140 {
10141 /* Input section has been discarded, either because
10142 it is a copy of a linkonce section or due to
10143 linker script /DISCARD/, so we'll be discarding
10144 the relocs too. */
10145 }
10146 else if (p->count != 0)
10147 {
10148 asection *srel = elf_section_data (p->sec)->sreloc;
10149 if (p->ifunc)
10150 srel = htab->elf.irelplt;
10151 srel->size += p->count * sizeof (Elf64_External_Rela);
10152 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10153 info->flags |= DF_TEXTREL;
10154 }
10155 }
10156 }
10157
10158 lgot_ents = elf_local_got_ents (ibfd);
10159 if (!lgot_ents)
10160 continue;
10161
10162 symtab_hdr = &elf_symtab_hdr (ibfd);
10163 locsymcount = symtab_hdr->sh_info;
10164 end_lgot_ents = lgot_ents + locsymcount;
10165 local_plt = (struct plt_entry **) end_lgot_ents;
10166 end_local_plt = local_plt + locsymcount;
10167 lgot_masks = (unsigned char *) end_local_plt;
10168 s = ppc64_elf_tdata (ibfd)->got;
10169 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10170 {
10171 struct got_entry **pent, *ent;
10172
10173 pent = lgot_ents;
10174 while ((ent = *pent) != NULL)
10175 if (ent->got.refcount > 0)
10176 {
10177 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10178 {
10179 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10180 *pent = ent->next;
10181 }
10182 else
10183 {
10184 unsigned int ent_size = 8;
10185 unsigned int rel_size = sizeof (Elf64_External_Rela);
10186
10187 ent->got.offset = s->size;
10188 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10189 {
10190 ent_size *= 2;
10191 rel_size *= 2;
10192 }
10193 s->size += ent_size;
10194 if ((*lgot_masks & PLT_IFUNC) != 0)
10195 {
10196 htab->elf.irelplt->size += rel_size;
10197 htab->got_reli_size += rel_size;
10198 }
10199 else if (bfd_link_pic (info))
10200 {
10201 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10202 srel->size += rel_size;
10203 }
10204 pent = &ent->next;
10205 }
10206 }
10207 else
10208 *pent = ent->next;
10209 }
10210
10211 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10212 for (; local_plt < end_local_plt; ++local_plt)
10213 {
10214 struct plt_entry *ent;
10215
10216 for (ent = *local_plt; ent != NULL; ent = ent->next)
10217 if (ent->plt.refcount > 0)
10218 {
10219 s = htab->elf.iplt;
10220 ent->plt.offset = s->size;
10221 s->size += PLT_ENTRY_SIZE (htab);
10222
10223 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10224 }
10225 else
10226 ent->plt.offset = (bfd_vma) -1;
10227 }
10228 }
10229
10230 /* Allocate global sym .plt and .got entries, and space for global
10231 sym dynamic relocs. */
10232 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10233 /* Stash the end of glink branch table. */
10234 if (htab->glink != NULL)
10235 htab->glink->rawsize = htab->glink->size;
10236
10237 if (!htab->opd_abi && !bfd_link_pic (info))
10238 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10239
10240 first_tlsld = NULL;
10241 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10242 {
10243 struct got_entry *ent;
10244
10245 if (!is_ppc64_elf (ibfd))
10246 continue;
10247
10248 ent = ppc64_tlsld_got (ibfd);
10249 if (ent->got.refcount > 0)
10250 {
10251 if (!htab->do_multi_toc && first_tlsld != NULL)
10252 {
10253 ent->is_indirect = TRUE;
10254 ent->got.ent = first_tlsld;
10255 }
10256 else
10257 {
10258 if (first_tlsld == NULL)
10259 first_tlsld = ent;
10260 s = ppc64_elf_tdata (ibfd)->got;
10261 ent->got.offset = s->size;
10262 ent->owner = ibfd;
10263 s->size += 16;
10264 if (bfd_link_pic (info))
10265 {
10266 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10267 srel->size += sizeof (Elf64_External_Rela);
10268 }
10269 }
10270 }
10271 else
10272 ent->got.offset = (bfd_vma) -1;
10273 }
10274
10275 /* We now have determined the sizes of the various dynamic sections.
10276 Allocate memory for them. */
10277 relocs = FALSE;
10278 for (s = dynobj->sections; s != NULL; s = s->next)
10279 {
10280 if ((s->flags & SEC_LINKER_CREATED) == 0)
10281 continue;
10282
10283 if (s == htab->brlt || s == htab->relbrlt)
10284 /* These haven't been allocated yet; don't strip. */
10285 continue;
10286 else if (s == htab->elf.sgot
10287 || s == htab->elf.splt
10288 || s == htab->elf.iplt
10289 || s == htab->glink
10290 || s == htab->elf.sdynbss
10291 || s == htab->elf.sdynrelro)
10292 {
10293 /* Strip this section if we don't need it; see the
10294 comment below. */
10295 }
10296 else if (s == htab->glink_eh_frame)
10297 {
10298 if (!bfd_is_abs_section (s->output_section))
10299 /* Not sized yet. */
10300 continue;
10301 }
10302 else if (CONST_STRNEQ (s->name, ".rela"))
10303 {
10304 if (s->size != 0)
10305 {
10306 if (s != htab->elf.srelplt)
10307 relocs = TRUE;
10308
10309 /* We use the reloc_count field as a counter if we need
10310 to copy relocs into the output file. */
10311 s->reloc_count = 0;
10312 }
10313 }
10314 else
10315 {
10316 /* It's not one of our sections, so don't allocate space. */
10317 continue;
10318 }
10319
10320 if (s->size == 0)
10321 {
10322 /* If we don't need this section, strip it from the
10323 output file. This is mostly to handle .rela.bss and
10324 .rela.plt. We must create both sections in
10325 create_dynamic_sections, because they must be created
10326 before the linker maps input sections to output
10327 sections. The linker does that before
10328 adjust_dynamic_symbol is called, and it is that
10329 function which decides whether anything needs to go
10330 into these sections. */
10331 s->flags |= SEC_EXCLUDE;
10332 continue;
10333 }
10334
10335 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10336 continue;
10337
10338 /* Allocate memory for the section contents. We use bfd_zalloc
10339 here in case unused entries are not reclaimed before the
10340 section's contents are written out. This should not happen,
10341 but this way if it does we get a R_PPC64_NONE reloc in .rela
10342 sections instead of garbage.
10343 We also rely on the section contents being zero when writing
10344 the GOT and .dynrelro. */
10345 s->contents = bfd_zalloc (dynobj, s->size);
10346 if (s->contents == NULL)
10347 return FALSE;
10348 }
10349
10350 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10351 {
10352 if (!is_ppc64_elf (ibfd))
10353 continue;
10354
10355 s = ppc64_elf_tdata (ibfd)->got;
10356 if (s != NULL && s != htab->elf.sgot)
10357 {
10358 if (s->size == 0)
10359 s->flags |= SEC_EXCLUDE;
10360 else
10361 {
10362 s->contents = bfd_zalloc (ibfd, s->size);
10363 if (s->contents == NULL)
10364 return FALSE;
10365 }
10366 }
10367 s = ppc64_elf_tdata (ibfd)->relgot;
10368 if (s != NULL)
10369 {
10370 if (s->size == 0)
10371 s->flags |= SEC_EXCLUDE;
10372 else
10373 {
10374 s->contents = bfd_zalloc (ibfd, s->size);
10375 if (s->contents == NULL)
10376 return FALSE;
10377 relocs = TRUE;
10378 s->reloc_count = 0;
10379 }
10380 }
10381 }
10382
10383 if (htab->elf.dynamic_sections_created)
10384 {
10385 bfd_boolean tls_opt;
10386
10387 /* Add some entries to the .dynamic section. We fill in the
10388 values later, in ppc64_elf_finish_dynamic_sections, but we
10389 must add the entries now so that we get the correct size for
10390 the .dynamic section. The DT_DEBUG entry is filled in by the
10391 dynamic linker and used by the debugger. */
10392 #define add_dynamic_entry(TAG, VAL) \
10393 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10394
10395 if (bfd_link_executable (info))
10396 {
10397 if (!add_dynamic_entry (DT_DEBUG, 0))
10398 return FALSE;
10399 }
10400
10401 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10402 {
10403 if (!add_dynamic_entry (DT_PLTGOT, 0)
10404 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10405 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10406 || !add_dynamic_entry (DT_JMPREL, 0)
10407 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10408 return FALSE;
10409 }
10410
10411 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10412 {
10413 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10414 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10415 return FALSE;
10416 }
10417
10418 tls_opt = (htab->params->tls_get_addr_opt
10419 && htab->tls_get_addr_fd != NULL
10420 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10421 if (tls_opt || !htab->opd_abi)
10422 {
10423 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10424 return FALSE;
10425 }
10426
10427 if (relocs)
10428 {
10429 if (!add_dynamic_entry (DT_RELA, 0)
10430 || !add_dynamic_entry (DT_RELASZ, 0)
10431 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10432 return FALSE;
10433
10434 /* If any dynamic relocs apply to a read-only section,
10435 then we need a DT_TEXTREL entry. */
10436 if ((info->flags & DF_TEXTREL) == 0)
10437 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10438
10439 if ((info->flags & DF_TEXTREL) != 0)
10440 {
10441 if (!add_dynamic_entry (DT_TEXTREL, 0))
10442 return FALSE;
10443 }
10444 }
10445 }
10446 #undef add_dynamic_entry
10447
10448 return TRUE;
10449 }
10450
10451 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10452
10453 static bfd_boolean
10454 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10455 {
10456 if (h->plt.plist != NULL
10457 && !h->def_regular
10458 && !h->pointer_equality_needed)
10459 return FALSE;
10460
10461 return _bfd_elf_hash_symbol (h);
10462 }
10463
10464 /* Determine the type of stub needed, if any, for a call. */
10465
10466 static inline enum ppc_stub_type
10467 ppc_type_of_stub (asection *input_sec,
10468 const Elf_Internal_Rela *rel,
10469 struct ppc_link_hash_entry **hash,
10470 struct plt_entry **plt_ent,
10471 bfd_vma destination,
10472 unsigned long local_off)
10473 {
10474 struct ppc_link_hash_entry *h = *hash;
10475 bfd_vma location;
10476 bfd_vma branch_offset;
10477 bfd_vma max_branch_offset;
10478 enum elf_ppc64_reloc_type r_type;
10479
10480 if (h != NULL)
10481 {
10482 struct plt_entry *ent;
10483 struct ppc_link_hash_entry *fdh = h;
10484 if (h->oh != NULL
10485 && h->oh->is_func_descriptor)
10486 {
10487 fdh = ppc_follow_link (h->oh);
10488 *hash = fdh;
10489 }
10490
10491 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10492 if (ent->addend == rel->r_addend
10493 && ent->plt.offset != (bfd_vma) -1)
10494 {
10495 *plt_ent = ent;
10496 return ppc_stub_plt_call;
10497 }
10498
10499 /* Here, we know we don't have a plt entry. If we don't have a
10500 either a defined function descriptor or a defined entry symbol
10501 in a regular object file, then it is pointless trying to make
10502 any other type of stub. */
10503 if (!is_static_defined (&fdh->elf)
10504 && !is_static_defined (&h->elf))
10505 return ppc_stub_none;
10506 }
10507 else if (elf_local_got_ents (input_sec->owner) != NULL)
10508 {
10509 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10510 struct plt_entry **local_plt = (struct plt_entry **)
10511 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10512 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10513
10514 if (local_plt[r_symndx] != NULL)
10515 {
10516 struct plt_entry *ent;
10517
10518 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10519 if (ent->addend == rel->r_addend
10520 && ent->plt.offset != (bfd_vma) -1)
10521 {
10522 *plt_ent = ent;
10523 return ppc_stub_plt_call;
10524 }
10525 }
10526 }
10527
10528 /* Determine where the call point is. */
10529 location = (input_sec->output_offset
10530 + input_sec->output_section->vma
10531 + rel->r_offset);
10532
10533 branch_offset = destination - location;
10534 r_type = ELF64_R_TYPE (rel->r_info);
10535
10536 /* Determine if a long branch stub is needed. */
10537 max_branch_offset = 1 << 25;
10538 if (r_type != R_PPC64_REL24)
10539 max_branch_offset = 1 << 15;
10540
10541 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10542 /* We need a stub. Figure out whether a long_branch or plt_branch
10543 is needed later. */
10544 return ppc_stub_long_branch;
10545
10546 return ppc_stub_none;
10547 }
10548
10549 /* With power7 weakly ordered memory model, it is possible for ld.so
10550 to update a plt entry in one thread and have another thread see a
10551 stale zero toc entry. To avoid this we need some sort of acquire
10552 barrier in the call stub. One solution is to make the load of the
10553 toc word seem to appear to depend on the load of the function entry
10554 word. Another solution is to test for r2 being zero, and branch to
10555 the appropriate glink entry if so.
10556
10557 . fake dep barrier compare
10558 . ld 12,xxx(2) ld 12,xxx(2)
10559 . mtctr 12 mtctr 12
10560 . xor 11,12,12 ld 2,xxx+8(2)
10561 . add 2,2,11 cmpldi 2,0
10562 . ld 2,xxx+8(2) bnectr+
10563 . bctr b <glink_entry>
10564
10565 The solution involving the compare turns out to be faster, so
10566 that's what we use unless the branch won't reach. */
10567
10568 #define ALWAYS_USE_FAKE_DEP 0
10569 #define ALWAYS_EMIT_R2SAVE 0
10570
10571 #define PPC_LO(v) ((v) & 0xffff)
10572 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10573 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10574
10575 static inline unsigned int
10576 plt_stub_size (struct ppc_link_hash_table *htab,
10577 struct ppc_stub_hash_entry *stub_entry,
10578 bfd_vma off)
10579 {
10580 unsigned size = 12;
10581
10582 if (ALWAYS_EMIT_R2SAVE
10583 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10584 size += 4;
10585 if (PPC_HA (off) != 0)
10586 size += 4;
10587 if (htab->opd_abi)
10588 {
10589 size += 4;
10590 if (htab->params->plt_static_chain)
10591 size += 4;
10592 if (htab->params->plt_thread_safe
10593 && htab->elf.dynamic_sections_created
10594 && stub_entry->h != NULL
10595 && stub_entry->h->elf.dynindx != -1)
10596 size += 8;
10597 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10598 size += 4;
10599 }
10600 if (stub_entry->h != NULL
10601 && (stub_entry->h == htab->tls_get_addr_fd
10602 || stub_entry->h == htab->tls_get_addr)
10603 && htab->params->tls_get_addr_opt)
10604 {
10605 size += 7 * 4;
10606 if (ALWAYS_EMIT_R2SAVE
10607 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10608 size += 6 * 4;
10609 }
10610 return size;
10611 }
10612
10613 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10614 then return the padding needed to do so. */
10615 static inline unsigned int
10616 plt_stub_pad (struct ppc_link_hash_table *htab,
10617 struct ppc_stub_hash_entry *stub_entry,
10618 bfd_vma plt_off)
10619 {
10620 int stub_align = 1 << htab->params->plt_stub_align;
10621 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10622 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10623
10624 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10625 > ((stub_size - 1) & -stub_align))
10626 return stub_align - (stub_off & (stub_align - 1));
10627 return 0;
10628 }
10629
10630 /* Build a .plt call stub. */
10631
10632 static inline bfd_byte *
10633 build_plt_stub (struct ppc_link_hash_table *htab,
10634 struct ppc_stub_hash_entry *stub_entry,
10635 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10636 {
10637 bfd *obfd = htab->params->stub_bfd;
10638 bfd_boolean plt_load_toc = htab->opd_abi;
10639 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10640 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10641 && htab->elf.dynamic_sections_created
10642 && stub_entry->h != NULL
10643 && stub_entry->h->elf.dynindx != -1);
10644 bfd_boolean use_fake_dep = plt_thread_safe;
10645 bfd_vma cmp_branch_off = 0;
10646
10647 if (!ALWAYS_USE_FAKE_DEP
10648 && plt_load_toc
10649 && plt_thread_safe
10650 && !((stub_entry->h == htab->tls_get_addr_fd
10651 || stub_entry->h == htab->tls_get_addr)
10652 && htab->params->tls_get_addr_opt))
10653 {
10654 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10655 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10656 / PLT_ENTRY_SIZE (htab));
10657 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10658 bfd_vma to, from;
10659
10660 if (pltindex > 32768)
10661 glinkoff += (pltindex - 32768) * 4;
10662 to = (glinkoff
10663 + htab->glink->output_offset
10664 + htab->glink->output_section->vma);
10665 from = (p - stub_entry->group->stub_sec->contents
10666 + 4 * (ALWAYS_EMIT_R2SAVE
10667 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10668 + 4 * (PPC_HA (offset) != 0)
10669 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10670 != PPC_HA (offset))
10671 + 4 * (plt_static_chain != 0)
10672 + 20
10673 + stub_entry->group->stub_sec->output_offset
10674 + stub_entry->group->stub_sec->output_section->vma);
10675 cmp_branch_off = to - from;
10676 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10677 }
10678
10679 if (PPC_HA (offset) != 0)
10680 {
10681 if (r != NULL)
10682 {
10683 if (ALWAYS_EMIT_R2SAVE
10684 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10685 r[0].r_offset += 4;
10686 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10687 r[1].r_offset = r[0].r_offset + 4;
10688 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10689 r[1].r_addend = r[0].r_addend;
10690 if (plt_load_toc)
10691 {
10692 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10693 {
10694 r[2].r_offset = r[1].r_offset + 4;
10695 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10696 r[2].r_addend = r[0].r_addend;
10697 }
10698 else
10699 {
10700 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10701 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10702 r[2].r_addend = r[0].r_addend + 8;
10703 if (plt_static_chain)
10704 {
10705 r[3].r_offset = r[2].r_offset + 4;
10706 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10707 r[3].r_addend = r[0].r_addend + 16;
10708 }
10709 }
10710 }
10711 }
10712 if (ALWAYS_EMIT_R2SAVE
10713 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10714 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10715 if (plt_load_toc)
10716 {
10717 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10718 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10719 }
10720 else
10721 {
10722 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10723 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10724 }
10725 if (plt_load_toc
10726 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10727 {
10728 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10729 offset = 0;
10730 }
10731 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10732 if (plt_load_toc)
10733 {
10734 if (use_fake_dep)
10735 {
10736 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10737 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10738 }
10739 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10740 if (plt_static_chain)
10741 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10742 }
10743 }
10744 else
10745 {
10746 if (r != NULL)
10747 {
10748 if (ALWAYS_EMIT_R2SAVE
10749 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10750 r[0].r_offset += 4;
10751 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10752 if (plt_load_toc)
10753 {
10754 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10755 {
10756 r[1].r_offset = r[0].r_offset + 4;
10757 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10758 r[1].r_addend = r[0].r_addend;
10759 }
10760 else
10761 {
10762 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10763 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10764 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10765 if (plt_static_chain)
10766 {
10767 r[2].r_offset = r[1].r_offset + 4;
10768 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10769 r[2].r_addend = r[0].r_addend + 8;
10770 }
10771 }
10772 }
10773 }
10774 if (ALWAYS_EMIT_R2SAVE
10775 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10776 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10777 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10778 if (plt_load_toc
10779 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10780 {
10781 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10782 offset = 0;
10783 }
10784 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10785 if (plt_load_toc)
10786 {
10787 if (use_fake_dep)
10788 {
10789 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10790 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10791 }
10792 if (plt_static_chain)
10793 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10794 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10795 }
10796 }
10797 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10798 {
10799 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10800 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10801 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10802 }
10803 else
10804 bfd_put_32 (obfd, BCTR, p), p += 4;
10805 return p;
10806 }
10807
10808 /* Build a special .plt call stub for __tls_get_addr. */
10809
10810 #define LD_R11_0R3 0xe9630000
10811 #define LD_R12_0R3 0xe9830000
10812 #define MR_R0_R3 0x7c601b78
10813 #define CMPDI_R11_0 0x2c2b0000
10814 #define ADD_R3_R12_R13 0x7c6c6a14
10815 #define BEQLR 0x4d820020
10816 #define MR_R3_R0 0x7c030378
10817 #define STD_R11_0R1 0xf9610000
10818 #define BCTRL 0x4e800421
10819 #define LD_R11_0R1 0xe9610000
10820 #define MTLR_R11 0x7d6803a6
10821
10822 static inline bfd_byte *
10823 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10824 struct ppc_stub_hash_entry *stub_entry,
10825 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10826 {
10827 bfd *obfd = htab->params->stub_bfd;
10828
10829 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10830 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10831 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10832 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10833 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10834 bfd_put_32 (obfd, BEQLR, p), p += 4;
10835 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10836 if (r != NULL)
10837 r[0].r_offset += 7 * 4;
10838 if (!ALWAYS_EMIT_R2SAVE
10839 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10840 return build_plt_stub (htab, stub_entry, p, offset, r);
10841
10842 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10843 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10844
10845 if (r != NULL)
10846 r[0].r_offset += 2 * 4;
10847 p = build_plt_stub (htab, stub_entry, p, offset, r);
10848 bfd_put_32 (obfd, BCTRL, p - 4);
10849
10850 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10851 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10852 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10853 bfd_put_32 (obfd, BLR, p), p += 4;
10854
10855 return p;
10856 }
10857
10858 static Elf_Internal_Rela *
10859 get_relocs (asection *sec, int count)
10860 {
10861 Elf_Internal_Rela *relocs;
10862 struct bfd_elf_section_data *elfsec_data;
10863
10864 elfsec_data = elf_section_data (sec);
10865 relocs = elfsec_data->relocs;
10866 if (relocs == NULL)
10867 {
10868 bfd_size_type relsize;
10869 relsize = sec->reloc_count * sizeof (*relocs);
10870 relocs = bfd_alloc (sec->owner, relsize);
10871 if (relocs == NULL)
10872 return NULL;
10873 elfsec_data->relocs = relocs;
10874 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10875 sizeof (Elf_Internal_Shdr));
10876 if (elfsec_data->rela.hdr == NULL)
10877 return NULL;
10878 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10879 * sizeof (Elf64_External_Rela));
10880 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10881 sec->reloc_count = 0;
10882 }
10883 relocs += sec->reloc_count;
10884 sec->reloc_count += count;
10885 return relocs;
10886 }
10887
10888 static bfd_vma
10889 get_r2off (struct bfd_link_info *info,
10890 struct ppc_stub_hash_entry *stub_entry)
10891 {
10892 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10893 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10894
10895 if (r2off == 0)
10896 {
10897 /* Support linking -R objects. Get the toc pointer from the
10898 opd entry. */
10899 char buf[8];
10900 if (!htab->opd_abi)
10901 return r2off;
10902 asection *opd = stub_entry->h->elf.root.u.def.section;
10903 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10904
10905 if (strcmp (opd->name, ".opd") != 0
10906 || opd->reloc_count != 0)
10907 {
10908 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10909 stub_entry->h->elf.root.root.string);
10910 bfd_set_error (bfd_error_bad_value);
10911 return (bfd_vma) -1;
10912 }
10913 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10914 return (bfd_vma) -1;
10915 r2off = bfd_get_64 (opd->owner, buf);
10916 r2off -= elf_gp (info->output_bfd);
10917 }
10918 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10919 return r2off;
10920 }
10921
10922 static bfd_boolean
10923 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10924 {
10925 struct ppc_stub_hash_entry *stub_entry;
10926 struct ppc_branch_hash_entry *br_entry;
10927 struct bfd_link_info *info;
10928 struct ppc_link_hash_table *htab;
10929 bfd_byte *loc;
10930 bfd_byte *p;
10931 bfd_vma dest, off;
10932 int size;
10933 Elf_Internal_Rela *r;
10934 asection *plt;
10935
10936 /* Massage our args to the form they really have. */
10937 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10938 info = in_arg;
10939
10940 htab = ppc_hash_table (info);
10941 if (htab == NULL)
10942 return FALSE;
10943
10944 /* Make a note of the offset within the stubs for this entry. */
10945 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10946 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10947
10948 htab->stub_count[stub_entry->stub_type - 1] += 1;
10949 switch (stub_entry->stub_type)
10950 {
10951 case ppc_stub_long_branch:
10952 case ppc_stub_long_branch_r2off:
10953 /* Branches are relative. This is where we are going to. */
10954 dest = (stub_entry->target_value
10955 + stub_entry->target_section->output_offset
10956 + stub_entry->target_section->output_section->vma);
10957 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10958 off = dest;
10959
10960 /* And this is where we are coming from. */
10961 off -= (stub_entry->stub_offset
10962 + stub_entry->group->stub_sec->output_offset
10963 + stub_entry->group->stub_sec->output_section->vma);
10964
10965 size = 4;
10966 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10967 {
10968 bfd_vma r2off = get_r2off (info, stub_entry);
10969
10970 if (r2off == (bfd_vma) -1)
10971 {
10972 htab->stub_error = TRUE;
10973 return FALSE;
10974 }
10975 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10976 loc += 4;
10977 size = 8;
10978 if (PPC_HA (r2off) != 0)
10979 {
10980 bfd_put_32 (htab->params->stub_bfd,
10981 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10982 loc += 4;
10983 size += 4;
10984 }
10985 if (PPC_LO (r2off) != 0)
10986 {
10987 bfd_put_32 (htab->params->stub_bfd,
10988 ADDI_R2_R2 | PPC_LO (r2off), loc);
10989 loc += 4;
10990 size += 4;
10991 }
10992 off -= size - 4;
10993 }
10994 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10995
10996 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10997 {
10998 info->callbacks->einfo
10999 (_("%P: long branch stub `%s' offset overflow\n"),
11000 stub_entry->root.string);
11001 htab->stub_error = TRUE;
11002 return FALSE;
11003 }
11004
11005 if (info->emitrelocations)
11006 {
11007 r = get_relocs (stub_entry->group->stub_sec, 1);
11008 if (r == NULL)
11009 return FALSE;
11010 r->r_offset = loc - stub_entry->group->stub_sec->contents;
11011 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
11012 r->r_addend = dest;
11013 if (stub_entry->h != NULL)
11014 {
11015 struct elf_link_hash_entry **hashes;
11016 unsigned long symndx;
11017 struct ppc_link_hash_entry *h;
11018
11019 hashes = elf_sym_hashes (htab->params->stub_bfd);
11020 if (hashes == NULL)
11021 {
11022 bfd_size_type hsize;
11023
11024 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
11025 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
11026 if (hashes == NULL)
11027 return FALSE;
11028 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11029 htab->stub_globals = 1;
11030 }
11031 symndx = htab->stub_globals++;
11032 h = stub_entry->h;
11033 hashes[symndx] = &h->elf;
11034 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11035 if (h->oh != NULL && h->oh->is_func)
11036 h = ppc_follow_link (h->oh);
11037 if (h->elf.root.u.def.section != stub_entry->target_section)
11038 /* H is an opd symbol. The addend must be zero. */
11039 r->r_addend = 0;
11040 else
11041 {
11042 off = (h->elf.root.u.def.value
11043 + h->elf.root.u.def.section->output_offset
11044 + h->elf.root.u.def.section->output_section->vma);
11045 r->r_addend -= off;
11046 }
11047 }
11048 }
11049 break;
11050
11051 case ppc_stub_plt_branch:
11052 case ppc_stub_plt_branch_r2off:
11053 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11054 stub_entry->root.string + 9,
11055 FALSE, FALSE);
11056 if (br_entry == NULL)
11057 {
11058 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
11059 stub_entry->root.string);
11060 htab->stub_error = TRUE;
11061 return FALSE;
11062 }
11063
11064 dest = (stub_entry->target_value
11065 + stub_entry->target_section->output_offset
11066 + stub_entry->target_section->output_section->vma);
11067 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11068 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11069
11070 bfd_put_64 (htab->brlt->owner, dest,
11071 htab->brlt->contents + br_entry->offset);
11072
11073 if (br_entry->iter == htab->stub_iteration)
11074 {
11075 br_entry->iter = 0;
11076
11077 if (htab->relbrlt != NULL)
11078 {
11079 /* Create a reloc for the branch lookup table entry. */
11080 Elf_Internal_Rela rela;
11081 bfd_byte *rl;
11082
11083 rela.r_offset = (br_entry->offset
11084 + htab->brlt->output_offset
11085 + htab->brlt->output_section->vma);
11086 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11087 rela.r_addend = dest;
11088
11089 rl = htab->relbrlt->contents;
11090 rl += (htab->relbrlt->reloc_count++
11091 * sizeof (Elf64_External_Rela));
11092 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11093 }
11094 else if (info->emitrelocations)
11095 {
11096 r = get_relocs (htab->brlt, 1);
11097 if (r == NULL)
11098 return FALSE;
11099 /* brlt, being SEC_LINKER_CREATED does not go through the
11100 normal reloc processing. Symbols and offsets are not
11101 translated from input file to output file form, so
11102 set up the offset per the output file. */
11103 r->r_offset = (br_entry->offset
11104 + htab->brlt->output_offset
11105 + htab->brlt->output_section->vma);
11106 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11107 r->r_addend = dest;
11108 }
11109 }
11110
11111 dest = (br_entry->offset
11112 + htab->brlt->output_offset
11113 + htab->brlt->output_section->vma);
11114
11115 off = (dest
11116 - elf_gp (htab->brlt->output_section->owner)
11117 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11118
11119 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11120 {
11121 info->callbacks->einfo
11122 (_("%P: linkage table error against `%T'\n"),
11123 stub_entry->root.string);
11124 bfd_set_error (bfd_error_bad_value);
11125 htab->stub_error = TRUE;
11126 return FALSE;
11127 }
11128
11129 if (info->emitrelocations)
11130 {
11131 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11132 if (r == NULL)
11133 return FALSE;
11134 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11135 if (bfd_big_endian (info->output_bfd))
11136 r[0].r_offset += 2;
11137 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11138 r[0].r_offset += 4;
11139 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11140 r[0].r_addend = dest;
11141 if (PPC_HA (off) != 0)
11142 {
11143 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11144 r[1].r_offset = r[0].r_offset + 4;
11145 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11146 r[1].r_addend = r[0].r_addend;
11147 }
11148 }
11149
11150 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11151 {
11152 if (PPC_HA (off) != 0)
11153 {
11154 size = 16;
11155 bfd_put_32 (htab->params->stub_bfd,
11156 ADDIS_R12_R2 | PPC_HA (off), loc);
11157 loc += 4;
11158 bfd_put_32 (htab->params->stub_bfd,
11159 LD_R12_0R12 | PPC_LO (off), loc);
11160 }
11161 else
11162 {
11163 size = 12;
11164 bfd_put_32 (htab->params->stub_bfd,
11165 LD_R12_0R2 | PPC_LO (off), loc);
11166 }
11167 }
11168 else
11169 {
11170 bfd_vma r2off = get_r2off (info, stub_entry);
11171
11172 if (r2off == (bfd_vma) -1)
11173 {
11174 htab->stub_error = TRUE;
11175 return FALSE;
11176 }
11177
11178 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11179 loc += 4;
11180 size = 16;
11181 if (PPC_HA (off) != 0)
11182 {
11183 size += 4;
11184 bfd_put_32 (htab->params->stub_bfd,
11185 ADDIS_R12_R2 | PPC_HA (off), loc);
11186 loc += 4;
11187 bfd_put_32 (htab->params->stub_bfd,
11188 LD_R12_0R12 | PPC_LO (off), loc);
11189 }
11190 else
11191 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11192
11193 if (PPC_HA (r2off) != 0)
11194 {
11195 size += 4;
11196 loc += 4;
11197 bfd_put_32 (htab->params->stub_bfd,
11198 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11199 }
11200 if (PPC_LO (r2off) != 0)
11201 {
11202 size += 4;
11203 loc += 4;
11204 bfd_put_32 (htab->params->stub_bfd,
11205 ADDI_R2_R2 | PPC_LO (r2off), loc);
11206 }
11207 }
11208 loc += 4;
11209 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11210 loc += 4;
11211 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11212 break;
11213
11214 case ppc_stub_plt_call:
11215 case ppc_stub_plt_call_r2save:
11216 if (stub_entry->h != NULL
11217 && stub_entry->h->is_func_descriptor
11218 && stub_entry->h->oh != NULL)
11219 {
11220 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11221
11222 /* If the old-ABI "dot-symbol" is undefined make it weak so
11223 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11224 if (fh->elf.root.type == bfd_link_hash_undefined
11225 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11226 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11227 fh->elf.root.type = bfd_link_hash_undefweak;
11228 }
11229
11230 /* Now build the stub. */
11231 dest = stub_entry->plt_ent->plt.offset & ~1;
11232 if (dest >= (bfd_vma) -2)
11233 abort ();
11234
11235 plt = htab->elf.splt;
11236 if (!htab->elf.dynamic_sections_created
11237 || stub_entry->h == NULL
11238 || stub_entry->h->elf.dynindx == -1)
11239 plt = htab->elf.iplt;
11240
11241 dest += plt->output_offset + plt->output_section->vma;
11242
11243 if (stub_entry->h == NULL
11244 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11245 {
11246 Elf_Internal_Rela rela;
11247 bfd_byte *rl;
11248
11249 rela.r_offset = dest;
11250 if (htab->opd_abi)
11251 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11252 else
11253 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11254 rela.r_addend = (stub_entry->target_value
11255 + stub_entry->target_section->output_offset
11256 + stub_entry->target_section->output_section->vma);
11257
11258 rl = (htab->elf.irelplt->contents
11259 + (htab->elf.irelplt->reloc_count++
11260 * sizeof (Elf64_External_Rela)));
11261 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11262 stub_entry->plt_ent->plt.offset |= 1;
11263 htab->local_ifunc_resolver = 1;
11264 }
11265
11266 off = (dest
11267 - elf_gp (plt->output_section->owner)
11268 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11269
11270 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11271 {
11272 info->callbacks->einfo
11273 /* xgettext:c-format */
11274 (_("%P: linkage table error against `%T'\n"),
11275 stub_entry->h != NULL
11276 ? stub_entry->h->elf.root.root.string
11277 : "<local sym>");
11278 bfd_set_error (bfd_error_bad_value);
11279 htab->stub_error = TRUE;
11280 return FALSE;
11281 }
11282
11283 if (htab->params->plt_stub_align != 0)
11284 {
11285 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11286
11287 stub_entry->group->stub_sec->size += pad;
11288 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11289 loc += pad;
11290 }
11291
11292 r = NULL;
11293 if (info->emitrelocations)
11294 {
11295 r = get_relocs (stub_entry->group->stub_sec,
11296 ((PPC_HA (off) != 0)
11297 + (htab->opd_abi
11298 ? 2 + (htab->params->plt_static_chain
11299 && PPC_HA (off + 16) == PPC_HA (off))
11300 : 1)));
11301 if (r == NULL)
11302 return FALSE;
11303 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11304 if (bfd_big_endian (info->output_bfd))
11305 r[0].r_offset += 2;
11306 r[0].r_addend = dest;
11307 }
11308 if (stub_entry->h != NULL
11309 && (stub_entry->h == htab->tls_get_addr_fd
11310 || stub_entry->h == htab->tls_get_addr)
11311 && htab->params->tls_get_addr_opt)
11312 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11313 else
11314 p = build_plt_stub (htab, stub_entry, loc, off, r);
11315 size = p - loc;
11316 break;
11317
11318 case ppc_stub_save_res:
11319 return TRUE;
11320
11321 default:
11322 BFD_FAIL ();
11323 return FALSE;
11324 }
11325
11326 stub_entry->group->stub_sec->size += size;
11327
11328 if (htab->params->emit_stub_syms)
11329 {
11330 struct elf_link_hash_entry *h;
11331 size_t len1, len2;
11332 char *name;
11333 const char *const stub_str[] = { "long_branch",
11334 "long_branch_r2off",
11335 "plt_branch",
11336 "plt_branch_r2off",
11337 "plt_call",
11338 "plt_call" };
11339
11340 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11341 len2 = strlen (stub_entry->root.string);
11342 name = bfd_malloc (len1 + len2 + 2);
11343 if (name == NULL)
11344 return FALSE;
11345 memcpy (name, stub_entry->root.string, 9);
11346 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11347 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11348 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11349 if (h == NULL)
11350 return FALSE;
11351 if (h->root.type == bfd_link_hash_new)
11352 {
11353 h->root.type = bfd_link_hash_defined;
11354 h->root.u.def.section = stub_entry->group->stub_sec;
11355 h->root.u.def.value = stub_entry->stub_offset;
11356 h->ref_regular = 1;
11357 h->def_regular = 1;
11358 h->ref_regular_nonweak = 1;
11359 h->forced_local = 1;
11360 h->non_elf = 0;
11361 h->root.linker_def = 1;
11362 }
11363 }
11364
11365 return TRUE;
11366 }
11367
11368 /* As above, but don't actually build the stub. Just bump offset so
11369 we know stub section sizes, and select plt_branch stubs where
11370 long_branch stubs won't do. */
11371
11372 static bfd_boolean
11373 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11374 {
11375 struct ppc_stub_hash_entry *stub_entry;
11376 struct bfd_link_info *info;
11377 struct ppc_link_hash_table *htab;
11378 bfd_vma off;
11379 int size;
11380
11381 /* Massage our args to the form they really have. */
11382 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11383 info = in_arg;
11384
11385 htab = ppc_hash_table (info);
11386 if (htab == NULL)
11387 return FALSE;
11388
11389 if (stub_entry->h != NULL
11390 && stub_entry->h->save_res
11391 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11392 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11393 {
11394 /* Don't make stubs to out-of-line register save/restore
11395 functions. Instead, emit copies of the functions. */
11396 stub_entry->group->needs_save_res = 1;
11397 stub_entry->stub_type = ppc_stub_save_res;
11398 return TRUE;
11399 }
11400
11401 if (stub_entry->stub_type == ppc_stub_plt_call
11402 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11403 {
11404 asection *plt;
11405 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11406 if (off >= (bfd_vma) -2)
11407 abort ();
11408 plt = htab->elf.splt;
11409 if (!htab->elf.dynamic_sections_created
11410 || stub_entry->h == NULL
11411 || stub_entry->h->elf.dynindx == -1)
11412 plt = htab->elf.iplt;
11413 off += (plt->output_offset
11414 + plt->output_section->vma
11415 - elf_gp (plt->output_section->owner)
11416 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11417
11418 size = plt_stub_size (htab, stub_entry, off);
11419 if (stub_entry->h != NULL
11420 && (stub_entry->h == htab->tls_get_addr_fd
11421 || stub_entry->h == htab->tls_get_addr)
11422 && htab->params->tls_get_addr_opt
11423 && (ALWAYS_EMIT_R2SAVE
11424 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11425 stub_entry->group->tls_get_addr_opt_bctrl
11426 = stub_entry->group->stub_sec->size + size - 5 * 4;
11427
11428 if (htab->params->plt_stub_align)
11429 size += plt_stub_pad (htab, stub_entry, off);
11430 if (info->emitrelocations)
11431 {
11432 stub_entry->group->stub_sec->reloc_count
11433 += ((PPC_HA (off) != 0)
11434 + (htab->opd_abi
11435 ? 2 + (htab->params->plt_static_chain
11436 && PPC_HA (off + 16) == PPC_HA (off))
11437 : 1));
11438 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11439 }
11440 }
11441 else
11442 {
11443 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11444 variants. */
11445 bfd_vma r2off = 0;
11446 bfd_vma local_off = 0;
11447
11448 off = (stub_entry->target_value
11449 + stub_entry->target_section->output_offset
11450 + stub_entry->target_section->output_section->vma);
11451 off -= (stub_entry->group->stub_sec->size
11452 + stub_entry->group->stub_sec->output_offset
11453 + stub_entry->group->stub_sec->output_section->vma);
11454
11455 /* Reset the stub type from the plt variant in case we now
11456 can reach with a shorter stub. */
11457 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11458 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11459
11460 size = 4;
11461 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11462 {
11463 r2off = get_r2off (info, stub_entry);
11464 if (r2off == (bfd_vma) -1)
11465 {
11466 htab->stub_error = TRUE;
11467 return FALSE;
11468 }
11469 size = 8;
11470 if (PPC_HA (r2off) != 0)
11471 size += 4;
11472 if (PPC_LO (r2off) != 0)
11473 size += 4;
11474 off -= size - 4;
11475 }
11476
11477 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11478
11479 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11480 Do the same for -R objects without function descriptors. */
11481 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11482 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11483 && r2off == 0
11484 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11485 {
11486 struct ppc_branch_hash_entry *br_entry;
11487
11488 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11489 stub_entry->root.string + 9,
11490 TRUE, FALSE);
11491 if (br_entry == NULL)
11492 {
11493 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11494 stub_entry->root.string);
11495 htab->stub_error = TRUE;
11496 return FALSE;
11497 }
11498
11499 if (br_entry->iter != htab->stub_iteration)
11500 {
11501 br_entry->iter = htab->stub_iteration;
11502 br_entry->offset = htab->brlt->size;
11503 htab->brlt->size += 8;
11504
11505 if (htab->relbrlt != NULL)
11506 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11507 else if (info->emitrelocations)
11508 {
11509 htab->brlt->reloc_count += 1;
11510 htab->brlt->flags |= SEC_RELOC;
11511 }
11512 }
11513
11514 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11515 off = (br_entry->offset
11516 + htab->brlt->output_offset
11517 + htab->brlt->output_section->vma
11518 - elf_gp (htab->brlt->output_section->owner)
11519 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11520
11521 if (info->emitrelocations)
11522 {
11523 stub_entry->group->stub_sec->reloc_count
11524 += 1 + (PPC_HA (off) != 0);
11525 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11526 }
11527
11528 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11529 {
11530 size = 12;
11531 if (PPC_HA (off) != 0)
11532 size = 16;
11533 }
11534 else
11535 {
11536 size = 16;
11537 if (PPC_HA (off) != 0)
11538 size += 4;
11539
11540 if (PPC_HA (r2off) != 0)
11541 size += 4;
11542 if (PPC_LO (r2off) != 0)
11543 size += 4;
11544 }
11545 }
11546 else if (info->emitrelocations)
11547 {
11548 stub_entry->group->stub_sec->reloc_count += 1;
11549 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11550 }
11551 }
11552
11553 stub_entry->group->stub_sec->size += size;
11554 return TRUE;
11555 }
11556
11557 /* Set up various things so that we can make a list of input sections
11558 for each output section included in the link. Returns -1 on error,
11559 0 when no stubs will be needed, and 1 on success. */
11560
11561 int
11562 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11563 {
11564 unsigned int id;
11565 bfd_size_type amt;
11566 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11567
11568 if (htab == NULL)
11569 return -1;
11570
11571 htab->sec_info_arr_size = bfd_get_next_section_id ();
11572 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11573 htab->sec_info = bfd_zmalloc (amt);
11574 if (htab->sec_info == NULL)
11575 return -1;
11576
11577 /* Set toc_off for com, und, abs and ind sections. */
11578 for (id = 0; id < 3; id++)
11579 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11580
11581 return 1;
11582 }
11583
11584 /* Set up for first pass at multitoc partitioning. */
11585
11586 void
11587 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11588 {
11589 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11590
11591 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11592 htab->toc_bfd = NULL;
11593 htab->toc_first_sec = NULL;
11594 }
11595
11596 /* The linker repeatedly calls this function for each TOC input section
11597 and linker generated GOT section. Group input bfds such that the toc
11598 within a group is less than 64k in size. */
11599
11600 bfd_boolean
11601 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11602 {
11603 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11604 bfd_vma addr, off, limit;
11605
11606 if (htab == NULL)
11607 return FALSE;
11608
11609 if (!htab->second_toc_pass)
11610 {
11611 /* Keep track of the first .toc or .got section for this input bfd. */
11612 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11613
11614 if (new_bfd)
11615 {
11616 htab->toc_bfd = isec->owner;
11617 htab->toc_first_sec = isec;
11618 }
11619
11620 addr = isec->output_offset + isec->output_section->vma;
11621 off = addr - htab->toc_curr;
11622 limit = 0x80008000;
11623 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11624 limit = 0x10000;
11625 if (off + isec->size > limit)
11626 {
11627 addr = (htab->toc_first_sec->output_offset
11628 + htab->toc_first_sec->output_section->vma);
11629 htab->toc_curr = addr;
11630 htab->toc_curr &= -TOC_BASE_ALIGN;
11631 }
11632
11633 /* toc_curr is the base address of this toc group. Set elf_gp
11634 for the input section to be the offset relative to the
11635 output toc base plus 0x8000. Making the input elf_gp an
11636 offset allows us to move the toc as a whole without
11637 recalculating input elf_gp. */
11638 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11639 off += TOC_BASE_OFF;
11640
11641 /* Die if someone uses a linker script that doesn't keep input
11642 file .toc and .got together. */
11643 if (new_bfd
11644 && elf_gp (isec->owner) != 0
11645 && elf_gp (isec->owner) != off)
11646 return FALSE;
11647
11648 elf_gp (isec->owner) = off;
11649 return TRUE;
11650 }
11651
11652 /* During the second pass toc_first_sec points to the start of
11653 a toc group, and toc_curr is used to track the old elf_gp.
11654 We use toc_bfd to ensure we only look at each bfd once. */
11655 if (htab->toc_bfd == isec->owner)
11656 return TRUE;
11657 htab->toc_bfd = isec->owner;
11658
11659 if (htab->toc_first_sec == NULL
11660 || htab->toc_curr != elf_gp (isec->owner))
11661 {
11662 htab->toc_curr = elf_gp (isec->owner);
11663 htab->toc_first_sec = isec;
11664 }
11665 addr = (htab->toc_first_sec->output_offset
11666 + htab->toc_first_sec->output_section->vma);
11667 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11668 elf_gp (isec->owner) = off;
11669
11670 return TRUE;
11671 }
11672
11673 /* Called via elf_link_hash_traverse to merge GOT entries for global
11674 symbol H. */
11675
11676 static bfd_boolean
11677 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11678 {
11679 if (h->root.type == bfd_link_hash_indirect)
11680 return TRUE;
11681
11682 merge_got_entries (&h->got.glist);
11683
11684 return TRUE;
11685 }
11686
11687 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11688 symbol H. */
11689
11690 static bfd_boolean
11691 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11692 {
11693 struct got_entry *gent;
11694
11695 if (h->root.type == bfd_link_hash_indirect)
11696 return TRUE;
11697
11698 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11699 if (!gent->is_indirect)
11700 allocate_got (h, (struct bfd_link_info *) inf, gent);
11701 return TRUE;
11702 }
11703
11704 /* Called on the first multitoc pass after the last call to
11705 ppc64_elf_next_toc_section. This function removes duplicate GOT
11706 entries. */
11707
11708 bfd_boolean
11709 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11710 {
11711 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11712 struct bfd *ibfd, *ibfd2;
11713 bfd_boolean done_something;
11714
11715 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11716
11717 if (!htab->do_multi_toc)
11718 return FALSE;
11719
11720 /* Merge global sym got entries within a toc group. */
11721 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11722
11723 /* And tlsld_got. */
11724 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11725 {
11726 struct got_entry *ent, *ent2;
11727
11728 if (!is_ppc64_elf (ibfd))
11729 continue;
11730
11731 ent = ppc64_tlsld_got (ibfd);
11732 if (!ent->is_indirect
11733 && ent->got.offset != (bfd_vma) -1)
11734 {
11735 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11736 {
11737 if (!is_ppc64_elf (ibfd2))
11738 continue;
11739
11740 ent2 = ppc64_tlsld_got (ibfd2);
11741 if (!ent2->is_indirect
11742 && ent2->got.offset != (bfd_vma) -1
11743 && elf_gp (ibfd2) == elf_gp (ibfd))
11744 {
11745 ent2->is_indirect = TRUE;
11746 ent2->got.ent = ent;
11747 }
11748 }
11749 }
11750 }
11751
11752 /* Zap sizes of got sections. */
11753 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11754 htab->elf.irelplt->size -= htab->got_reli_size;
11755 htab->got_reli_size = 0;
11756
11757 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11758 {
11759 asection *got, *relgot;
11760
11761 if (!is_ppc64_elf (ibfd))
11762 continue;
11763
11764 got = ppc64_elf_tdata (ibfd)->got;
11765 if (got != NULL)
11766 {
11767 got->rawsize = got->size;
11768 got->size = 0;
11769 relgot = ppc64_elf_tdata (ibfd)->relgot;
11770 relgot->rawsize = relgot->size;
11771 relgot->size = 0;
11772 }
11773 }
11774
11775 /* Now reallocate the got, local syms first. We don't need to
11776 allocate section contents again since we never increase size. */
11777 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11778 {
11779 struct got_entry **lgot_ents;
11780 struct got_entry **end_lgot_ents;
11781 struct plt_entry **local_plt;
11782 struct plt_entry **end_local_plt;
11783 unsigned char *lgot_masks;
11784 bfd_size_type locsymcount;
11785 Elf_Internal_Shdr *symtab_hdr;
11786 asection *s;
11787
11788 if (!is_ppc64_elf (ibfd))
11789 continue;
11790
11791 lgot_ents = elf_local_got_ents (ibfd);
11792 if (!lgot_ents)
11793 continue;
11794
11795 symtab_hdr = &elf_symtab_hdr (ibfd);
11796 locsymcount = symtab_hdr->sh_info;
11797 end_lgot_ents = lgot_ents + locsymcount;
11798 local_plt = (struct plt_entry **) end_lgot_ents;
11799 end_local_plt = local_plt + locsymcount;
11800 lgot_masks = (unsigned char *) end_local_plt;
11801 s = ppc64_elf_tdata (ibfd)->got;
11802 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11803 {
11804 struct got_entry *ent;
11805
11806 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11807 {
11808 unsigned int ent_size = 8;
11809 unsigned int rel_size = sizeof (Elf64_External_Rela);
11810
11811 ent->got.offset = s->size;
11812 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11813 {
11814 ent_size *= 2;
11815 rel_size *= 2;
11816 }
11817 s->size += ent_size;
11818 if ((*lgot_masks & PLT_IFUNC) != 0)
11819 {
11820 htab->elf.irelplt->size += rel_size;
11821 htab->got_reli_size += rel_size;
11822 }
11823 else if (bfd_link_pic (info))
11824 {
11825 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11826 srel->size += rel_size;
11827 }
11828 }
11829 }
11830 }
11831
11832 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11833
11834 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11835 {
11836 struct got_entry *ent;
11837
11838 if (!is_ppc64_elf (ibfd))
11839 continue;
11840
11841 ent = ppc64_tlsld_got (ibfd);
11842 if (!ent->is_indirect
11843 && ent->got.offset != (bfd_vma) -1)
11844 {
11845 asection *s = ppc64_elf_tdata (ibfd)->got;
11846 ent->got.offset = s->size;
11847 s->size += 16;
11848 if (bfd_link_pic (info))
11849 {
11850 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11851 srel->size += sizeof (Elf64_External_Rela);
11852 }
11853 }
11854 }
11855
11856 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11857 if (!done_something)
11858 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11859 {
11860 asection *got;
11861
11862 if (!is_ppc64_elf (ibfd))
11863 continue;
11864
11865 got = ppc64_elf_tdata (ibfd)->got;
11866 if (got != NULL)
11867 {
11868 done_something = got->rawsize != got->size;
11869 if (done_something)
11870 break;
11871 }
11872 }
11873
11874 if (done_something)
11875 (*htab->params->layout_sections_again) ();
11876
11877 /* Set up for second pass over toc sections to recalculate elf_gp
11878 on input sections. */
11879 htab->toc_bfd = NULL;
11880 htab->toc_first_sec = NULL;
11881 htab->second_toc_pass = TRUE;
11882 return done_something;
11883 }
11884
11885 /* Called after second pass of multitoc partitioning. */
11886
11887 void
11888 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11889 {
11890 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11891
11892 /* After the second pass, toc_curr tracks the TOC offset used
11893 for code sections below in ppc64_elf_next_input_section. */
11894 htab->toc_curr = TOC_BASE_OFF;
11895 }
11896
11897 /* No toc references were found in ISEC. If the code in ISEC makes no
11898 calls, then there's no need to use toc adjusting stubs when branching
11899 into ISEC. Actually, indirect calls from ISEC are OK as they will
11900 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11901 needed, and 2 if a cyclical call-graph was found but no other reason
11902 for a stub was detected. If called from the top level, a return of
11903 2 means the same as a return of 0. */
11904
11905 static int
11906 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11907 {
11908 int ret;
11909
11910 /* Mark this section as checked. */
11911 isec->call_check_done = 1;
11912
11913 /* We know none of our code bearing sections will need toc stubs. */
11914 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11915 return 0;
11916
11917 if (isec->size == 0)
11918 return 0;
11919
11920 if (isec->output_section == NULL)
11921 return 0;
11922
11923 ret = 0;
11924 if (isec->reloc_count != 0)
11925 {
11926 Elf_Internal_Rela *relstart, *rel;
11927 Elf_Internal_Sym *local_syms;
11928 struct ppc_link_hash_table *htab;
11929
11930 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11931 info->keep_memory);
11932 if (relstart == NULL)
11933 return -1;
11934
11935 /* Look for branches to outside of this section. */
11936 local_syms = NULL;
11937 htab = ppc_hash_table (info);
11938 if (htab == NULL)
11939 return -1;
11940
11941 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11942 {
11943 enum elf_ppc64_reloc_type r_type;
11944 unsigned long r_symndx;
11945 struct elf_link_hash_entry *h;
11946 struct ppc_link_hash_entry *eh;
11947 Elf_Internal_Sym *sym;
11948 asection *sym_sec;
11949 struct _opd_sec_data *opd;
11950 bfd_vma sym_value;
11951 bfd_vma dest;
11952
11953 r_type = ELF64_R_TYPE (rel->r_info);
11954 if (r_type != R_PPC64_REL24
11955 && r_type != R_PPC64_REL14
11956 && r_type != R_PPC64_REL14_BRTAKEN
11957 && r_type != R_PPC64_REL14_BRNTAKEN)
11958 continue;
11959
11960 r_symndx = ELF64_R_SYM (rel->r_info);
11961 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11962 isec->owner))
11963 {
11964 ret = -1;
11965 break;
11966 }
11967
11968 /* Calls to dynamic lib functions go through a plt call stub
11969 that uses r2. */
11970 eh = (struct ppc_link_hash_entry *) h;
11971 if (eh != NULL
11972 && (eh->elf.plt.plist != NULL
11973 || (eh->oh != NULL
11974 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11975 {
11976 ret = 1;
11977 break;
11978 }
11979
11980 if (sym_sec == NULL)
11981 /* Ignore other undefined symbols. */
11982 continue;
11983
11984 /* Assume branches to other sections not included in the
11985 link need stubs too, to cover -R and absolute syms. */
11986 if (sym_sec->output_section == NULL)
11987 {
11988 ret = 1;
11989 break;
11990 }
11991
11992 if (h == NULL)
11993 sym_value = sym->st_value;
11994 else
11995 {
11996 if (h->root.type != bfd_link_hash_defined
11997 && h->root.type != bfd_link_hash_defweak)
11998 abort ();
11999 sym_value = h->root.u.def.value;
12000 }
12001 sym_value += rel->r_addend;
12002
12003 /* If this branch reloc uses an opd sym, find the code section. */
12004 opd = get_opd_info (sym_sec);
12005 if (opd != NULL)
12006 {
12007 if (h == NULL && opd->adjust != NULL)
12008 {
12009 long adjust;
12010
12011 adjust = opd->adjust[OPD_NDX (sym_value)];
12012 if (adjust == -1)
12013 /* Assume deleted functions won't ever be called. */
12014 continue;
12015 sym_value += adjust;
12016 }
12017
12018 dest = opd_entry_value (sym_sec, sym_value,
12019 &sym_sec, NULL, FALSE);
12020 if (dest == (bfd_vma) -1)
12021 continue;
12022 }
12023 else
12024 dest = (sym_value
12025 + sym_sec->output_offset
12026 + sym_sec->output_section->vma);
12027
12028 /* Ignore branch to self. */
12029 if (sym_sec == isec)
12030 continue;
12031
12032 /* If the called function uses the toc, we need a stub. */
12033 if (sym_sec->has_toc_reloc
12034 || sym_sec->makes_toc_func_call)
12035 {
12036 ret = 1;
12037 break;
12038 }
12039
12040 /* Assume any branch that needs a long branch stub might in fact
12041 need a plt_branch stub. A plt_branch stub uses r2. */
12042 else if (dest - (isec->output_offset
12043 + isec->output_section->vma
12044 + rel->r_offset) + (1 << 25)
12045 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12046 ? h->other
12047 : sym->st_other))
12048 {
12049 ret = 1;
12050 break;
12051 }
12052
12053 /* If calling back to a section in the process of being
12054 tested, we can't say for sure that no toc adjusting stubs
12055 are needed, so don't return zero. */
12056 else if (sym_sec->call_check_in_progress)
12057 ret = 2;
12058
12059 /* Branches to another section that itself doesn't have any TOC
12060 references are OK. Recursively call ourselves to check. */
12061 else if (!sym_sec->call_check_done)
12062 {
12063 int recur;
12064
12065 /* Mark current section as indeterminate, so that other
12066 sections that call back to current won't be marked as
12067 known. */
12068 isec->call_check_in_progress = 1;
12069 recur = toc_adjusting_stub_needed (info, sym_sec);
12070 isec->call_check_in_progress = 0;
12071
12072 if (recur != 0)
12073 {
12074 ret = recur;
12075 if (recur != 2)
12076 break;
12077 }
12078 }
12079 }
12080
12081 if (local_syms != NULL
12082 && (elf_symtab_hdr (isec->owner).contents
12083 != (unsigned char *) local_syms))
12084 free (local_syms);
12085 if (elf_section_data (isec)->relocs != relstart)
12086 free (relstart);
12087 }
12088
12089 if ((ret & 1) == 0
12090 && isec->map_head.s != NULL
12091 && (strcmp (isec->output_section->name, ".init") == 0
12092 || strcmp (isec->output_section->name, ".fini") == 0))
12093 {
12094 if (isec->map_head.s->has_toc_reloc
12095 || isec->map_head.s->makes_toc_func_call)
12096 ret = 1;
12097 else if (!isec->map_head.s->call_check_done)
12098 {
12099 int recur;
12100 isec->call_check_in_progress = 1;
12101 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12102 isec->call_check_in_progress = 0;
12103 if (recur != 0)
12104 ret = recur;
12105 }
12106 }
12107
12108 if (ret == 1)
12109 isec->makes_toc_func_call = 1;
12110
12111 return ret;
12112 }
12113
12114 /* The linker repeatedly calls this function for each input section,
12115 in the order that input sections are linked into output sections.
12116 Build lists of input sections to determine groupings between which
12117 we may insert linker stubs. */
12118
12119 bfd_boolean
12120 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12121 {
12122 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12123
12124 if (htab == NULL)
12125 return FALSE;
12126
12127 if ((isec->output_section->flags & SEC_CODE) != 0
12128 && isec->output_section->id < htab->sec_info_arr_size)
12129 {
12130 /* This happens to make the list in reverse order,
12131 which is what we want. */
12132 htab->sec_info[isec->id].u.list
12133 = htab->sec_info[isec->output_section->id].u.list;
12134 htab->sec_info[isec->output_section->id].u.list = isec;
12135 }
12136
12137 if (htab->multi_toc_needed)
12138 {
12139 /* Analyse sections that aren't already flagged as needing a
12140 valid toc pointer. Exclude .fixup for the linux kernel.
12141 .fixup contains branches, but only back to the function that
12142 hit an exception. */
12143 if (!(isec->has_toc_reloc
12144 || (isec->flags & SEC_CODE) == 0
12145 || strcmp (isec->name, ".fixup") == 0
12146 || isec->call_check_done))
12147 {
12148 if (toc_adjusting_stub_needed (info, isec) < 0)
12149 return FALSE;
12150 }
12151 /* Make all sections use the TOC assigned for this object file.
12152 This will be wrong for pasted sections; We fix that in
12153 check_pasted_section(). */
12154 if (elf_gp (isec->owner) != 0)
12155 htab->toc_curr = elf_gp (isec->owner);
12156 }
12157
12158 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12159 return TRUE;
12160 }
12161
12162 /* Check that all .init and .fini sections use the same toc, if they
12163 have toc relocs. */
12164
12165 static bfd_boolean
12166 check_pasted_section (struct bfd_link_info *info, const char *name)
12167 {
12168 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12169
12170 if (o != NULL)
12171 {
12172 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12173 bfd_vma toc_off = 0;
12174 asection *i;
12175
12176 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12177 if (i->has_toc_reloc)
12178 {
12179 if (toc_off == 0)
12180 toc_off = htab->sec_info[i->id].toc_off;
12181 else if (toc_off != htab->sec_info[i->id].toc_off)
12182 return FALSE;
12183 }
12184
12185 if (toc_off == 0)
12186 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12187 if (i->makes_toc_func_call)
12188 {
12189 toc_off = htab->sec_info[i->id].toc_off;
12190 break;
12191 }
12192
12193 /* Make sure the whole pasted function uses the same toc offset. */
12194 if (toc_off != 0)
12195 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12196 htab->sec_info[i->id].toc_off = toc_off;
12197 }
12198 return TRUE;
12199 }
12200
12201 bfd_boolean
12202 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12203 {
12204 return (check_pasted_section (info, ".init")
12205 & check_pasted_section (info, ".fini"));
12206 }
12207
12208 /* See whether we can group stub sections together. Grouping stub
12209 sections may result in fewer stubs. More importantly, we need to
12210 put all .init* and .fini* stubs at the beginning of the .init or
12211 .fini output sections respectively, because glibc splits the
12212 _init and _fini functions into multiple parts. Putting a stub in
12213 the middle of a function is not a good idea. */
12214
12215 static bfd_boolean
12216 group_sections (struct bfd_link_info *info,
12217 bfd_size_type stub_group_size,
12218 bfd_boolean stubs_always_before_branch)
12219 {
12220 struct ppc_link_hash_table *htab;
12221 asection *osec;
12222 bfd_boolean suppress_size_errors;
12223
12224 htab = ppc_hash_table (info);
12225 if (htab == NULL)
12226 return FALSE;
12227
12228 suppress_size_errors = FALSE;
12229 if (stub_group_size == 1)
12230 {
12231 /* Default values. */
12232 if (stubs_always_before_branch)
12233 stub_group_size = 0x1e00000;
12234 else
12235 stub_group_size = 0x1c00000;
12236 suppress_size_errors = TRUE;
12237 }
12238
12239 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12240 {
12241 asection *tail;
12242
12243 if (osec->id >= htab->sec_info_arr_size)
12244 continue;
12245
12246 tail = htab->sec_info[osec->id].u.list;
12247 while (tail != NULL)
12248 {
12249 asection *curr;
12250 asection *prev;
12251 bfd_size_type total;
12252 bfd_boolean big_sec;
12253 bfd_vma curr_toc;
12254 struct map_stub *group;
12255 bfd_size_type group_size;
12256
12257 curr = tail;
12258 total = tail->size;
12259 group_size = (ppc64_elf_section_data (tail) != NULL
12260 && ppc64_elf_section_data (tail)->has_14bit_branch
12261 ? stub_group_size >> 10 : stub_group_size);
12262
12263 big_sec = total > group_size;
12264 if (big_sec && !suppress_size_errors)
12265 /* xgettext:c-format */
12266 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12267 tail->owner, tail);
12268 curr_toc = htab->sec_info[tail->id].toc_off;
12269
12270 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12271 && ((total += curr->output_offset - prev->output_offset)
12272 < (ppc64_elf_section_data (prev) != NULL
12273 && ppc64_elf_section_data (prev)->has_14bit_branch
12274 ? (group_size = stub_group_size >> 10) : group_size))
12275 && htab->sec_info[prev->id].toc_off == curr_toc)
12276 curr = prev;
12277
12278 /* OK, the size from the start of CURR to the end is less
12279 than group_size and thus can be handled by one stub
12280 section. (or the tail section is itself larger than
12281 group_size, in which case we may be toast.) We should
12282 really be keeping track of the total size of stubs added
12283 here, as stubs contribute to the final output section
12284 size. That's a little tricky, and this way will only
12285 break if stubs added make the total size more than 2^25,
12286 ie. for the default stub_group_size, if stubs total more
12287 than 2097152 bytes, or nearly 75000 plt call stubs. */
12288 group = bfd_alloc (curr->owner, sizeof (*group));
12289 if (group == NULL)
12290 return FALSE;
12291 group->link_sec = curr;
12292 group->stub_sec = NULL;
12293 group->needs_save_res = 0;
12294 group->tls_get_addr_opt_bctrl = -1u;
12295 group->next = htab->group;
12296 htab->group = group;
12297 do
12298 {
12299 prev = htab->sec_info[tail->id].u.list;
12300 /* Set up this stub group. */
12301 htab->sec_info[tail->id].u.group = group;
12302 }
12303 while (tail != curr && (tail = prev) != NULL);
12304
12305 /* But wait, there's more! Input sections up to group_size
12306 bytes before the stub section can be handled by it too.
12307 Don't do this if we have a really large section after the
12308 stubs, as adding more stubs increases the chance that
12309 branches may not reach into the stub section. */
12310 if (!stubs_always_before_branch && !big_sec)
12311 {
12312 total = 0;
12313 while (prev != NULL
12314 && ((total += tail->output_offset - prev->output_offset)
12315 < (ppc64_elf_section_data (prev) != NULL
12316 && ppc64_elf_section_data (prev)->has_14bit_branch
12317 ? (group_size = stub_group_size >> 10) : group_size))
12318 && htab->sec_info[prev->id].toc_off == curr_toc)
12319 {
12320 tail = prev;
12321 prev = htab->sec_info[tail->id].u.list;
12322 htab->sec_info[tail->id].u.group = group;
12323 }
12324 }
12325 tail = prev;
12326 }
12327 }
12328 return TRUE;
12329 }
12330
12331 static const unsigned char glink_eh_frame_cie[] =
12332 {
12333 0, 0, 0, 16, /* length. */
12334 0, 0, 0, 0, /* id. */
12335 1, /* CIE version. */
12336 'z', 'R', 0, /* Augmentation string. */
12337 4, /* Code alignment. */
12338 0x78, /* Data alignment. */
12339 65, /* RA reg. */
12340 1, /* Augmentation size. */
12341 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12342 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12343 };
12344
12345 static size_t
12346 stub_eh_frame_size (struct map_stub *group, size_t align)
12347 {
12348 size_t this_size = 17;
12349 if (group->tls_get_addr_opt_bctrl != -1u)
12350 {
12351 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12352 if (to_bctrl < 64)
12353 this_size += 1;
12354 else if (to_bctrl < 256)
12355 this_size += 2;
12356 else if (to_bctrl < 65536)
12357 this_size += 3;
12358 else
12359 this_size += 5;
12360 this_size += 6;
12361 }
12362 this_size = (this_size + align - 1) & -align;
12363 return this_size;
12364 }
12365
12366 /* Stripping output sections is normally done before dynamic section
12367 symbols have been allocated. This function is called later, and
12368 handles cases like htab->brlt which is mapped to its own output
12369 section. */
12370
12371 static void
12372 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12373 {
12374 if (isec->size == 0
12375 && isec->output_section->size == 0
12376 && !(isec->output_section->flags & SEC_KEEP)
12377 && !bfd_section_removed_from_list (info->output_bfd,
12378 isec->output_section)
12379 && elf_section_data (isec->output_section)->dynindx == 0)
12380 {
12381 isec->output_section->flags |= SEC_EXCLUDE;
12382 bfd_section_list_remove (info->output_bfd, isec->output_section);
12383 info->output_bfd->section_count--;
12384 }
12385 }
12386
12387 /* Determine and set the size of the stub section for a final link.
12388
12389 The basic idea here is to examine all the relocations looking for
12390 PC-relative calls to a target that is unreachable with a "bl"
12391 instruction. */
12392
12393 bfd_boolean
12394 ppc64_elf_size_stubs (struct bfd_link_info *info)
12395 {
12396 bfd_size_type stub_group_size;
12397 bfd_boolean stubs_always_before_branch;
12398 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12399
12400 if (htab == NULL)
12401 return FALSE;
12402
12403 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12404 htab->params->plt_thread_safe = 1;
12405 if (!htab->opd_abi)
12406 htab->params->plt_thread_safe = 0;
12407 else if (htab->params->plt_thread_safe == -1)
12408 {
12409 static const char *const thread_starter[] =
12410 {
12411 "pthread_create",
12412 /* libstdc++ */
12413 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12414 /* librt */
12415 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12416 "mq_notify", "create_timer",
12417 /* libanl */
12418 "getaddrinfo_a",
12419 /* libgomp */
12420 "GOMP_parallel",
12421 "GOMP_parallel_start",
12422 "GOMP_parallel_loop_static",
12423 "GOMP_parallel_loop_static_start",
12424 "GOMP_parallel_loop_dynamic",
12425 "GOMP_parallel_loop_dynamic_start",
12426 "GOMP_parallel_loop_guided",
12427 "GOMP_parallel_loop_guided_start",
12428 "GOMP_parallel_loop_runtime",
12429 "GOMP_parallel_loop_runtime_start",
12430 "GOMP_parallel_sections",
12431 "GOMP_parallel_sections_start",
12432 /* libgo */
12433 "__go_go",
12434 };
12435 unsigned i;
12436
12437 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12438 {
12439 struct elf_link_hash_entry *h;
12440 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12441 FALSE, FALSE, TRUE);
12442 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12443 if (htab->params->plt_thread_safe)
12444 break;
12445 }
12446 }
12447 stubs_always_before_branch = htab->params->group_size < 0;
12448 if (htab->params->group_size < 0)
12449 stub_group_size = -htab->params->group_size;
12450 else
12451 stub_group_size = htab->params->group_size;
12452
12453 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12454 return FALSE;
12455
12456 #define STUB_SHRINK_ITER 20
12457 /* Loop until no stubs added. After iteration 20 of this loop we may
12458 exit on a stub section shrinking. This is to break out of a
12459 pathological case where adding stubs on one iteration decreases
12460 section gaps (perhaps due to alignment), which then requires
12461 fewer or smaller stubs on the next iteration. */
12462
12463 while (1)
12464 {
12465 bfd *input_bfd;
12466 unsigned int bfd_indx;
12467 struct map_stub *group;
12468
12469 htab->stub_iteration += 1;
12470
12471 for (input_bfd = info->input_bfds, bfd_indx = 0;
12472 input_bfd != NULL;
12473 input_bfd = input_bfd->link.next, bfd_indx++)
12474 {
12475 Elf_Internal_Shdr *symtab_hdr;
12476 asection *section;
12477 Elf_Internal_Sym *local_syms = NULL;
12478
12479 if (!is_ppc64_elf (input_bfd))
12480 continue;
12481
12482 /* We'll need the symbol table in a second. */
12483 symtab_hdr = &elf_symtab_hdr (input_bfd);
12484 if (symtab_hdr->sh_info == 0)
12485 continue;
12486
12487 /* Walk over each section attached to the input bfd. */
12488 for (section = input_bfd->sections;
12489 section != NULL;
12490 section = section->next)
12491 {
12492 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12493
12494 /* If there aren't any relocs, then there's nothing more
12495 to do. */
12496 if ((section->flags & SEC_RELOC) == 0
12497 || (section->flags & SEC_ALLOC) == 0
12498 || (section->flags & SEC_LOAD) == 0
12499 || (section->flags & SEC_CODE) == 0
12500 || section->reloc_count == 0)
12501 continue;
12502
12503 /* If this section is a link-once section that will be
12504 discarded, then don't create any stubs. */
12505 if (section->output_section == NULL
12506 || section->output_section->owner != info->output_bfd)
12507 continue;
12508
12509 /* Get the relocs. */
12510 internal_relocs
12511 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12512 info->keep_memory);
12513 if (internal_relocs == NULL)
12514 goto error_ret_free_local;
12515
12516 /* Now examine each relocation. */
12517 irela = internal_relocs;
12518 irelaend = irela + section->reloc_count;
12519 for (; irela < irelaend; irela++)
12520 {
12521 enum elf_ppc64_reloc_type r_type;
12522 unsigned int r_indx;
12523 enum ppc_stub_type stub_type;
12524 struct ppc_stub_hash_entry *stub_entry;
12525 asection *sym_sec, *code_sec;
12526 bfd_vma sym_value, code_value;
12527 bfd_vma destination;
12528 unsigned long local_off;
12529 bfd_boolean ok_dest;
12530 struct ppc_link_hash_entry *hash;
12531 struct ppc_link_hash_entry *fdh;
12532 struct elf_link_hash_entry *h;
12533 Elf_Internal_Sym *sym;
12534 char *stub_name;
12535 const asection *id_sec;
12536 struct _opd_sec_data *opd;
12537 struct plt_entry *plt_ent;
12538
12539 r_type = ELF64_R_TYPE (irela->r_info);
12540 r_indx = ELF64_R_SYM (irela->r_info);
12541
12542 if (r_type >= R_PPC64_max)
12543 {
12544 bfd_set_error (bfd_error_bad_value);
12545 goto error_ret_free_internal;
12546 }
12547
12548 /* Only look for stubs on branch instructions. */
12549 if (r_type != R_PPC64_REL24
12550 && r_type != R_PPC64_REL14
12551 && r_type != R_PPC64_REL14_BRTAKEN
12552 && r_type != R_PPC64_REL14_BRNTAKEN)
12553 continue;
12554
12555 /* Now determine the call target, its name, value,
12556 section. */
12557 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12558 r_indx, input_bfd))
12559 goto error_ret_free_internal;
12560 hash = (struct ppc_link_hash_entry *) h;
12561
12562 ok_dest = FALSE;
12563 fdh = NULL;
12564 sym_value = 0;
12565 if (hash == NULL)
12566 {
12567 sym_value = sym->st_value;
12568 if (sym_sec != NULL
12569 && sym_sec->output_section != NULL)
12570 ok_dest = TRUE;
12571 }
12572 else if (hash->elf.root.type == bfd_link_hash_defined
12573 || hash->elf.root.type == bfd_link_hash_defweak)
12574 {
12575 sym_value = hash->elf.root.u.def.value;
12576 if (sym_sec->output_section != NULL)
12577 ok_dest = TRUE;
12578 }
12579 else if (hash->elf.root.type == bfd_link_hash_undefweak
12580 || hash->elf.root.type == bfd_link_hash_undefined)
12581 {
12582 /* Recognise an old ABI func code entry sym, and
12583 use the func descriptor sym instead if it is
12584 defined. */
12585 if (hash->elf.root.root.string[0] == '.'
12586 && hash->oh != NULL)
12587 {
12588 fdh = ppc_follow_link (hash->oh);
12589 if (fdh->elf.root.type == bfd_link_hash_defined
12590 || fdh->elf.root.type == bfd_link_hash_defweak)
12591 {
12592 sym_sec = fdh->elf.root.u.def.section;
12593 sym_value = fdh->elf.root.u.def.value;
12594 if (sym_sec->output_section != NULL)
12595 ok_dest = TRUE;
12596 }
12597 else
12598 fdh = NULL;
12599 }
12600 }
12601 else
12602 {
12603 bfd_set_error (bfd_error_bad_value);
12604 goto error_ret_free_internal;
12605 }
12606
12607 destination = 0;
12608 local_off = 0;
12609 if (ok_dest)
12610 {
12611 sym_value += irela->r_addend;
12612 destination = (sym_value
12613 + sym_sec->output_offset
12614 + sym_sec->output_section->vma);
12615 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12616 ? hash->elf.other
12617 : sym->st_other);
12618 }
12619
12620 code_sec = sym_sec;
12621 code_value = sym_value;
12622 opd = get_opd_info (sym_sec);
12623 if (opd != NULL)
12624 {
12625 bfd_vma dest;
12626
12627 if (hash == NULL && opd->adjust != NULL)
12628 {
12629 long adjust = opd->adjust[OPD_NDX (sym_value)];
12630 if (adjust == -1)
12631 continue;
12632 code_value += adjust;
12633 sym_value += adjust;
12634 }
12635 dest = opd_entry_value (sym_sec, sym_value,
12636 &code_sec, &code_value, FALSE);
12637 if (dest != (bfd_vma) -1)
12638 {
12639 destination = dest;
12640 if (fdh != NULL)
12641 {
12642 /* Fixup old ABI sym to point at code
12643 entry. */
12644 hash->elf.root.type = bfd_link_hash_defweak;
12645 hash->elf.root.u.def.section = code_sec;
12646 hash->elf.root.u.def.value = code_value;
12647 }
12648 }
12649 }
12650
12651 /* Determine what (if any) linker stub is needed. */
12652 plt_ent = NULL;
12653 stub_type = ppc_type_of_stub (section, irela, &hash,
12654 &plt_ent, destination,
12655 local_off);
12656
12657 if (stub_type != ppc_stub_plt_call)
12658 {
12659 /* Check whether we need a TOC adjusting stub.
12660 Since the linker pastes together pieces from
12661 different object files when creating the
12662 _init and _fini functions, it may be that a
12663 call to what looks like a local sym is in
12664 fact a call needing a TOC adjustment. */
12665 if (code_sec != NULL
12666 && code_sec->output_section != NULL
12667 && (htab->sec_info[code_sec->id].toc_off
12668 != htab->sec_info[section->id].toc_off)
12669 && (code_sec->has_toc_reloc
12670 || code_sec->makes_toc_func_call))
12671 stub_type = ppc_stub_long_branch_r2off;
12672 }
12673
12674 if (stub_type == ppc_stub_none)
12675 continue;
12676
12677 /* __tls_get_addr calls might be eliminated. */
12678 if (stub_type != ppc_stub_plt_call
12679 && hash != NULL
12680 && (hash == htab->tls_get_addr
12681 || hash == htab->tls_get_addr_fd)
12682 && section->has_tls_reloc
12683 && irela != internal_relocs)
12684 {
12685 /* Get tls info. */
12686 unsigned char *tls_mask;
12687
12688 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12689 irela - 1, input_bfd))
12690 goto error_ret_free_internal;
12691 if (*tls_mask != 0)
12692 continue;
12693 }
12694
12695 if (stub_type == ppc_stub_plt_call)
12696 {
12697 if (!htab->opd_abi
12698 && htab->params->plt_localentry0 != 0
12699 && is_elfv2_localentry0 (&hash->elf))
12700 htab->has_plt_localentry0 = 1;
12701 else if (irela + 1 < irelaend
12702 && irela[1].r_offset == irela->r_offset + 4
12703 && (ELF64_R_TYPE (irela[1].r_info)
12704 == R_PPC64_TOCSAVE))
12705 {
12706 if (!tocsave_find (htab, INSERT,
12707 &local_syms, irela + 1, input_bfd))
12708 goto error_ret_free_internal;
12709 }
12710 else
12711 stub_type = ppc_stub_plt_call_r2save;
12712 }
12713
12714 /* Support for grouping stub sections. */
12715 id_sec = htab->sec_info[section->id].u.group->link_sec;
12716
12717 /* Get the name of this stub. */
12718 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12719 if (!stub_name)
12720 goto error_ret_free_internal;
12721
12722 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12723 stub_name, FALSE, FALSE);
12724 if (stub_entry != NULL)
12725 {
12726 /* The proper stub has already been created. */
12727 free (stub_name);
12728 if (stub_type == ppc_stub_plt_call_r2save)
12729 stub_entry->stub_type = stub_type;
12730 continue;
12731 }
12732
12733 stub_entry = ppc_add_stub (stub_name, section, info);
12734 if (stub_entry == NULL)
12735 {
12736 free (stub_name);
12737 error_ret_free_internal:
12738 if (elf_section_data (section)->relocs == NULL)
12739 free (internal_relocs);
12740 error_ret_free_local:
12741 if (local_syms != NULL
12742 && (symtab_hdr->contents
12743 != (unsigned char *) local_syms))
12744 free (local_syms);
12745 return FALSE;
12746 }
12747
12748 stub_entry->stub_type = stub_type;
12749 if (stub_type != ppc_stub_plt_call
12750 && stub_type != ppc_stub_plt_call_r2save)
12751 {
12752 stub_entry->target_value = code_value;
12753 stub_entry->target_section = code_sec;
12754 }
12755 else
12756 {
12757 stub_entry->target_value = sym_value;
12758 stub_entry->target_section = sym_sec;
12759 }
12760 stub_entry->h = hash;
12761 stub_entry->plt_ent = plt_ent;
12762 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12763
12764 if (stub_entry->h != NULL)
12765 htab->stub_globals += 1;
12766 }
12767
12768 /* We're done with the internal relocs, free them. */
12769 if (elf_section_data (section)->relocs != internal_relocs)
12770 free (internal_relocs);
12771 }
12772
12773 if (local_syms != NULL
12774 && symtab_hdr->contents != (unsigned char *) local_syms)
12775 {
12776 if (!info->keep_memory)
12777 free (local_syms);
12778 else
12779 symtab_hdr->contents = (unsigned char *) local_syms;
12780 }
12781 }
12782
12783 /* We may have added some stubs. Find out the new size of the
12784 stub sections. */
12785 for (group = htab->group; group != NULL; group = group->next)
12786 if (group->stub_sec != NULL)
12787 {
12788 asection *stub_sec = group->stub_sec;
12789
12790 if (htab->stub_iteration <= STUB_SHRINK_ITER
12791 || stub_sec->rawsize < stub_sec->size)
12792 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12793 stub_sec->rawsize = stub_sec->size;
12794 stub_sec->size = 0;
12795 stub_sec->reloc_count = 0;
12796 stub_sec->flags &= ~SEC_RELOC;
12797 }
12798
12799 htab->brlt->size = 0;
12800 htab->brlt->reloc_count = 0;
12801 htab->brlt->flags &= ~SEC_RELOC;
12802 if (htab->relbrlt != NULL)
12803 htab->relbrlt->size = 0;
12804
12805 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12806
12807 for (group = htab->group; group != NULL; group = group->next)
12808 if (group->needs_save_res)
12809 group->stub_sec->size += htab->sfpr->size;
12810
12811 if (info->emitrelocations
12812 && htab->glink != NULL && htab->glink->size != 0)
12813 {
12814 htab->glink->reloc_count = 1;
12815 htab->glink->flags |= SEC_RELOC;
12816 }
12817
12818 if (htab->glink_eh_frame != NULL
12819 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12820 && htab->glink_eh_frame->output_section->size != 0)
12821 {
12822 size_t size = 0, align = 4;
12823
12824 for (group = htab->group; group != NULL; group = group->next)
12825 if (group->stub_sec != NULL)
12826 size += stub_eh_frame_size (group, align);
12827 if (htab->glink != NULL && htab->glink->size != 0)
12828 size += (24 + align - 1) & -align;
12829 if (size != 0)
12830 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12831 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12832 size = (size + align - 1) & -align;
12833 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12834 htab->glink_eh_frame->size = size;
12835 }
12836
12837 if (htab->params->plt_stub_align != 0)
12838 for (group = htab->group; group != NULL; group = group->next)
12839 if (group->stub_sec != NULL)
12840 group->stub_sec->size = ((group->stub_sec->size
12841 + (1 << htab->params->plt_stub_align) - 1)
12842 & -(1 << htab->params->plt_stub_align));
12843
12844 for (group = htab->group; group != NULL; group = group->next)
12845 if (group->stub_sec != NULL
12846 && group->stub_sec->rawsize != group->stub_sec->size
12847 && (htab->stub_iteration <= STUB_SHRINK_ITER
12848 || group->stub_sec->rawsize < group->stub_sec->size))
12849 break;
12850
12851 if (group == NULL
12852 && (htab->glink_eh_frame == NULL
12853 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12854 break;
12855
12856 /* Ask the linker to do its stuff. */
12857 (*htab->params->layout_sections_again) ();
12858 }
12859
12860 if (htab->glink_eh_frame != NULL
12861 && htab->glink_eh_frame->size != 0)
12862 {
12863 bfd_vma val;
12864 bfd_byte *p, *last_fde;
12865 size_t last_fde_len, size, align, pad;
12866 struct map_stub *group;
12867
12868 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12869 if (p == NULL)
12870 return FALSE;
12871 htab->glink_eh_frame->contents = p;
12872 last_fde = p;
12873 align = 4;
12874
12875 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12876 /* CIE length (rewrite in case little-endian). */
12877 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12878 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12879 p += last_fde_len + 4;
12880
12881 for (group = htab->group; group != NULL; group = group->next)
12882 if (group->stub_sec != NULL)
12883 {
12884 last_fde = p;
12885 last_fde_len = stub_eh_frame_size (group, align) - 4;
12886 /* FDE length. */
12887 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12888 p += 4;
12889 /* CIE pointer. */
12890 val = p - htab->glink_eh_frame->contents;
12891 bfd_put_32 (htab->elf.dynobj, val, p);
12892 p += 4;
12893 /* Offset to stub section, written later. */
12894 p += 4;
12895 /* stub section size. */
12896 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12897 p += 4;
12898 /* Augmentation. */
12899 p += 1;
12900 if (group->tls_get_addr_opt_bctrl != -1u)
12901 {
12902 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12903
12904 /* This FDE needs more than just the default.
12905 Describe __tls_get_addr_opt stub LR. */
12906 if (to_bctrl < 64)
12907 *p++ = DW_CFA_advance_loc + to_bctrl;
12908 else if (to_bctrl < 256)
12909 {
12910 *p++ = DW_CFA_advance_loc1;
12911 *p++ = to_bctrl;
12912 }
12913 else if (to_bctrl < 65536)
12914 {
12915 *p++ = DW_CFA_advance_loc2;
12916 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12917 p += 2;
12918 }
12919 else
12920 {
12921 *p++ = DW_CFA_advance_loc4;
12922 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12923 p += 4;
12924 }
12925 *p++ = DW_CFA_offset_extended_sf;
12926 *p++ = 65;
12927 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12928 *p++ = DW_CFA_advance_loc + 4;
12929 *p++ = DW_CFA_restore_extended;
12930 *p++ = 65;
12931 }
12932 /* Pad. */
12933 p = last_fde + last_fde_len + 4;
12934 }
12935 if (htab->glink != NULL && htab->glink->size != 0)
12936 {
12937 last_fde = p;
12938 last_fde_len = ((24 + align - 1) & -align) - 4;
12939 /* FDE length. */
12940 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12941 p += 4;
12942 /* CIE pointer. */
12943 val = p - htab->glink_eh_frame->contents;
12944 bfd_put_32 (htab->elf.dynobj, val, p);
12945 p += 4;
12946 /* Offset to .glink, written later. */
12947 p += 4;
12948 /* .glink size. */
12949 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12950 p += 4;
12951 /* Augmentation. */
12952 p += 1;
12953
12954 *p++ = DW_CFA_advance_loc + 1;
12955 *p++ = DW_CFA_register;
12956 *p++ = 65;
12957 *p++ = htab->opd_abi ? 12 : 0;
12958 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12959 *p++ = DW_CFA_restore_extended;
12960 *p++ = 65;
12961 p += ((24 + align - 1) & -align) - 24;
12962 }
12963 /* Subsume any padding into the last FDE if user .eh_frame
12964 sections are aligned more than glink_eh_frame. Otherwise any
12965 zero padding will be seen as a terminator. */
12966 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12967 size = p - htab->glink_eh_frame->contents;
12968 pad = ((size + align - 1) & -align) - size;
12969 htab->glink_eh_frame->size = size + pad;
12970 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12971 }
12972
12973 maybe_strip_output (info, htab->brlt);
12974 if (htab->glink_eh_frame != NULL)
12975 maybe_strip_output (info, htab->glink_eh_frame);
12976
12977 return TRUE;
12978 }
12979
12980 /* Called after we have determined section placement. If sections
12981 move, we'll be called again. Provide a value for TOCstart. */
12982
12983 bfd_vma
12984 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12985 {
12986 asection *s;
12987 bfd_vma TOCstart, adjust;
12988
12989 if (info != NULL)
12990 {
12991 struct elf_link_hash_entry *h;
12992 struct elf_link_hash_table *htab = elf_hash_table (info);
12993
12994 if (is_elf_hash_table (htab)
12995 && htab->hgot != NULL)
12996 h = htab->hgot;
12997 else
12998 {
12999 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
13000 if (is_elf_hash_table (htab))
13001 htab->hgot = h;
13002 }
13003 if (h != NULL
13004 && h->root.type == bfd_link_hash_defined
13005 && !h->root.linker_def
13006 && (!is_elf_hash_table (htab)
13007 || h->def_regular))
13008 {
13009 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
13010 + h->root.u.def.section->output_offset
13011 + h->root.u.def.section->output_section->vma);
13012 _bfd_set_gp_value (obfd, TOCstart);
13013 return TOCstart;
13014 }
13015 }
13016
13017 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
13018 order. The TOC starts where the first of these sections starts. */
13019 s = bfd_get_section_by_name (obfd, ".got");
13020 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13021 s = bfd_get_section_by_name (obfd, ".toc");
13022 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13023 s = bfd_get_section_by_name (obfd, ".tocbss");
13024 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13025 s = bfd_get_section_by_name (obfd, ".plt");
13026 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13027 {
13028 /* This may happen for
13029 o references to TOC base (SYM@toc / TOC[tc0]) without a
13030 .toc directive
13031 o bad linker script
13032 o --gc-sections and empty TOC sections
13033
13034 FIXME: Warn user? */
13035
13036 /* Look for a likely section. We probably won't even be
13037 using TOCstart. */
13038 for (s = obfd->sections; s != NULL; s = s->next)
13039 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13040 | SEC_EXCLUDE))
13041 == (SEC_ALLOC | SEC_SMALL_DATA))
13042 break;
13043 if (s == NULL)
13044 for (s = obfd->sections; s != NULL; s = s->next)
13045 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13046 == (SEC_ALLOC | SEC_SMALL_DATA))
13047 break;
13048 if (s == NULL)
13049 for (s = obfd->sections; s != NULL; s = s->next)
13050 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13051 == SEC_ALLOC)
13052 break;
13053 if (s == NULL)
13054 for (s = obfd->sections; s != NULL; s = s->next)
13055 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13056 break;
13057 }
13058
13059 TOCstart = 0;
13060 if (s != NULL)
13061 TOCstart = s->output_section->vma + s->output_offset;
13062
13063 /* Force alignment. */
13064 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13065 TOCstart -= adjust;
13066 _bfd_set_gp_value (obfd, TOCstart);
13067
13068 if (info != NULL && s != NULL)
13069 {
13070 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13071
13072 if (htab != NULL)
13073 {
13074 if (htab->elf.hgot != NULL)
13075 {
13076 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13077 htab->elf.hgot->root.u.def.section = s;
13078 }
13079 }
13080 else
13081 {
13082 struct bfd_link_hash_entry *bh = NULL;
13083 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13084 s, TOC_BASE_OFF - adjust,
13085 NULL, FALSE, FALSE, &bh);
13086 }
13087 }
13088 return TOCstart;
13089 }
13090
13091 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13092 write out any global entry stubs. */
13093
13094 static bfd_boolean
13095 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13096 {
13097 struct bfd_link_info *info;
13098 struct ppc_link_hash_table *htab;
13099 struct plt_entry *pent;
13100 asection *s;
13101
13102 if (h->root.type == bfd_link_hash_indirect)
13103 return TRUE;
13104
13105 if (!h->pointer_equality_needed)
13106 return TRUE;
13107
13108 if (h->def_regular)
13109 return TRUE;
13110
13111 info = inf;
13112 htab = ppc_hash_table (info);
13113 if (htab == NULL)
13114 return FALSE;
13115
13116 s = htab->glink;
13117 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13118 if (pent->plt.offset != (bfd_vma) -1
13119 && pent->addend == 0)
13120 {
13121 bfd_byte *p;
13122 asection *plt;
13123 bfd_vma off;
13124
13125 p = s->contents + h->root.u.def.value;
13126 plt = htab->elf.splt;
13127 if (!htab->elf.dynamic_sections_created
13128 || h->dynindx == -1)
13129 plt = htab->elf.iplt;
13130 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13131 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13132
13133 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13134 {
13135 info->callbacks->einfo
13136 (_("%P: linkage table error against `%T'\n"),
13137 h->root.root.string);
13138 bfd_set_error (bfd_error_bad_value);
13139 htab->stub_error = TRUE;
13140 }
13141
13142 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13143 if (htab->params->emit_stub_syms)
13144 {
13145 size_t len = strlen (h->root.root.string);
13146 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13147
13148 if (name == NULL)
13149 return FALSE;
13150
13151 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13152 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13153 if (h == NULL)
13154 return FALSE;
13155 if (h->root.type == bfd_link_hash_new)
13156 {
13157 h->root.type = bfd_link_hash_defined;
13158 h->root.u.def.section = s;
13159 h->root.u.def.value = p - s->contents;
13160 h->ref_regular = 1;
13161 h->def_regular = 1;
13162 h->ref_regular_nonweak = 1;
13163 h->forced_local = 1;
13164 h->non_elf = 0;
13165 h->root.linker_def = 1;
13166 }
13167 }
13168
13169 if (PPC_HA (off) != 0)
13170 {
13171 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13172 p += 4;
13173 }
13174 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13175 p += 4;
13176 bfd_put_32 (s->owner, MTCTR_R12, p);
13177 p += 4;
13178 bfd_put_32 (s->owner, BCTR, p);
13179 break;
13180 }
13181 return TRUE;
13182 }
13183
13184 /* Build all the stubs associated with the current output file.
13185 The stubs are kept in a hash table attached to the main linker
13186 hash table. This function is called via gldelf64ppc_finish. */
13187
13188 bfd_boolean
13189 ppc64_elf_build_stubs (struct bfd_link_info *info,
13190 char **stats)
13191 {
13192 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13193 struct map_stub *group;
13194 asection *stub_sec;
13195 bfd_byte *p;
13196 int stub_sec_count = 0;
13197
13198 if (htab == NULL)
13199 return FALSE;
13200
13201 /* Allocate memory to hold the linker stubs. */
13202 for (group = htab->group; group != NULL; group = group->next)
13203 if ((stub_sec = group->stub_sec) != NULL
13204 && stub_sec->size != 0)
13205 {
13206 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13207 if (stub_sec->contents == NULL)
13208 return FALSE;
13209 stub_sec->size = 0;
13210 }
13211
13212 if (htab->glink != NULL && htab->glink->size != 0)
13213 {
13214 unsigned int indx;
13215 bfd_vma plt0;
13216
13217 /* Build the .glink plt call stub. */
13218 if (htab->params->emit_stub_syms)
13219 {
13220 struct elf_link_hash_entry *h;
13221 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13222 TRUE, FALSE, FALSE);
13223 if (h == NULL)
13224 return FALSE;
13225 if (h->root.type == bfd_link_hash_new)
13226 {
13227 h->root.type = bfd_link_hash_defined;
13228 h->root.u.def.section = htab->glink;
13229 h->root.u.def.value = 8;
13230 h->ref_regular = 1;
13231 h->def_regular = 1;
13232 h->ref_regular_nonweak = 1;
13233 h->forced_local = 1;
13234 h->non_elf = 0;
13235 h->root.linker_def = 1;
13236 }
13237 }
13238 plt0 = (htab->elf.splt->output_section->vma
13239 + htab->elf.splt->output_offset
13240 - 16);
13241 if (info->emitrelocations)
13242 {
13243 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13244 if (r == NULL)
13245 return FALSE;
13246 r->r_offset = (htab->glink->output_offset
13247 + htab->glink->output_section->vma);
13248 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13249 r->r_addend = plt0;
13250 }
13251 p = htab->glink->contents;
13252 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13253 bfd_put_64 (htab->glink->owner, plt0, p);
13254 p += 8;
13255 if (htab->opd_abi)
13256 {
13257 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13258 p += 4;
13259 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13260 p += 4;
13261 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13262 p += 4;
13263 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13264 p += 4;
13265 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13266 p += 4;
13267 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13268 p += 4;
13269 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13270 p += 4;
13271 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13272 p += 4;
13273 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13274 p += 4;
13275 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13276 p += 4;
13277 }
13278 else
13279 {
13280 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13281 p += 4;
13282 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13283 p += 4;
13284 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13285 p += 4;
13286 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13287 p += 4;
13288 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13289 p += 4;
13290 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13291 p += 4;
13292 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13293 p += 4;
13294 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13295 p += 4;
13296 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13297 p += 4;
13298 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13299 p += 4;
13300 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13301 p += 4;
13302 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13303 p += 4;
13304 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13305 p += 4;
13306 }
13307 bfd_put_32 (htab->glink->owner, BCTR, p);
13308 p += 4;
13309 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13310 {
13311 bfd_put_32 (htab->glink->owner, NOP, p);
13312 p += 4;
13313 }
13314
13315 /* Build the .glink lazy link call stubs. */
13316 indx = 0;
13317 while (p < htab->glink->contents + htab->glink->rawsize)
13318 {
13319 if (htab->opd_abi)
13320 {
13321 if (indx < 0x8000)
13322 {
13323 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13324 p += 4;
13325 }
13326 else
13327 {
13328 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13329 p += 4;
13330 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13331 p);
13332 p += 4;
13333 }
13334 }
13335 bfd_put_32 (htab->glink->owner,
13336 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13337 indx++;
13338 p += 4;
13339 }
13340
13341 /* Build .glink global entry stubs. */
13342 if (htab->glink->size > htab->glink->rawsize)
13343 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13344 }
13345
13346 if (htab->brlt != NULL && htab->brlt->size != 0)
13347 {
13348 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13349 htab->brlt->size);
13350 if (htab->brlt->contents == NULL)
13351 return FALSE;
13352 }
13353 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13354 {
13355 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13356 htab->relbrlt->size);
13357 if (htab->relbrlt->contents == NULL)
13358 return FALSE;
13359 }
13360
13361 /* Build the stubs as directed by the stub hash table. */
13362 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13363
13364 for (group = htab->group; group != NULL; group = group->next)
13365 if (group->needs_save_res)
13366 {
13367 stub_sec = group->stub_sec;
13368 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13369 htab->sfpr->size);
13370 if (htab->params->emit_stub_syms)
13371 {
13372 unsigned int i;
13373
13374 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13375 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13376 return FALSE;
13377 }
13378 stub_sec->size += htab->sfpr->size;
13379 }
13380
13381 if (htab->relbrlt != NULL)
13382 htab->relbrlt->reloc_count = 0;
13383
13384 if (htab->params->plt_stub_align != 0)
13385 for (group = htab->group; group != NULL; group = group->next)
13386 if ((stub_sec = group->stub_sec) != NULL)
13387 stub_sec->size = ((stub_sec->size
13388 + (1 << htab->params->plt_stub_align) - 1)
13389 & -(1 << htab->params->plt_stub_align));
13390
13391 for (group = htab->group; group != NULL; group = group->next)
13392 if ((stub_sec = group->stub_sec) != NULL)
13393 {
13394 stub_sec_count += 1;
13395 if (stub_sec->rawsize != stub_sec->size
13396 && (htab->stub_iteration <= STUB_SHRINK_ITER
13397 || stub_sec->rawsize < stub_sec->size))
13398 break;
13399 }
13400
13401 /* Note that the glink_eh_frame check here is not only testing that
13402 the generated size matched the calculated size but also that
13403 bfd_elf_discard_info didn't make any changes to the section. */
13404 if (group != NULL
13405 || (htab->glink_eh_frame != NULL
13406 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13407 {
13408 htab->stub_error = TRUE;
13409 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13410 }
13411
13412 if (htab->stub_error)
13413 return FALSE;
13414
13415 if (stats != NULL)
13416 {
13417 *stats = bfd_malloc (500);
13418 if (*stats == NULL)
13419 return FALSE;
13420
13421 sprintf (*stats, _("linker stubs in %u group%s\n"
13422 " branch %lu\n"
13423 " toc adjust %lu\n"
13424 " long branch %lu\n"
13425 " long toc adj %lu\n"
13426 " plt call %lu\n"
13427 " plt call toc %lu\n"
13428 " global entry %lu"),
13429 stub_sec_count,
13430 stub_sec_count == 1 ? "" : "s",
13431 htab->stub_count[ppc_stub_long_branch - 1],
13432 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13433 htab->stub_count[ppc_stub_plt_branch - 1],
13434 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13435 htab->stub_count[ppc_stub_plt_call - 1],
13436 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13437 htab->stub_count[ppc_stub_global_entry - 1]);
13438 }
13439 return TRUE;
13440 }
13441
13442 /* What to do when ld finds relocations against symbols defined in
13443 discarded sections. */
13444
13445 static unsigned int
13446 ppc64_elf_action_discarded (asection *sec)
13447 {
13448 if (strcmp (".opd", sec->name) == 0)
13449 return 0;
13450
13451 if (strcmp (".toc", sec->name) == 0)
13452 return 0;
13453
13454 if (strcmp (".toc1", sec->name) == 0)
13455 return 0;
13456
13457 return _bfd_elf_default_action_discarded (sec);
13458 }
13459
13460 /* The RELOCATE_SECTION function is called by the ELF backend linker
13461 to handle the relocations for a section.
13462
13463 The relocs are always passed as Rela structures; if the section
13464 actually uses Rel structures, the r_addend field will always be
13465 zero.
13466
13467 This function is responsible for adjust the section contents as
13468 necessary, and (if using Rela relocs and generating a
13469 relocatable output file) adjusting the reloc addend as
13470 necessary.
13471
13472 This function does not have to worry about setting the reloc
13473 address or the reloc symbol index.
13474
13475 LOCAL_SYMS is a pointer to the swapped in local symbols.
13476
13477 LOCAL_SECTIONS is an array giving the section in the input file
13478 corresponding to the st_shndx field of each local symbol.
13479
13480 The global hash table entry for the global symbols can be found
13481 via elf_sym_hashes (input_bfd).
13482
13483 When generating relocatable output, this function must handle
13484 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13485 going to be the section symbol corresponding to the output
13486 section, which means that the addend must be adjusted
13487 accordingly. */
13488
13489 static bfd_boolean
13490 ppc64_elf_relocate_section (bfd *output_bfd,
13491 struct bfd_link_info *info,
13492 bfd *input_bfd,
13493 asection *input_section,
13494 bfd_byte *contents,
13495 Elf_Internal_Rela *relocs,
13496 Elf_Internal_Sym *local_syms,
13497 asection **local_sections)
13498 {
13499 struct ppc_link_hash_table *htab;
13500 Elf_Internal_Shdr *symtab_hdr;
13501 struct elf_link_hash_entry **sym_hashes;
13502 Elf_Internal_Rela *rel;
13503 Elf_Internal_Rela *wrel;
13504 Elf_Internal_Rela *relend;
13505 Elf_Internal_Rela outrel;
13506 bfd_byte *loc;
13507 struct got_entry **local_got_ents;
13508 bfd_vma TOCstart;
13509 bfd_boolean ret = TRUE;
13510 bfd_boolean is_opd;
13511 /* Assume 'at' branch hints. */
13512 bfd_boolean is_isa_v2 = TRUE;
13513 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13514
13515 /* Initialize howto table if needed. */
13516 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13517 ppc_howto_init ();
13518
13519 htab = ppc_hash_table (info);
13520 if (htab == NULL)
13521 return FALSE;
13522
13523 /* Don't relocate stub sections. */
13524 if (input_section->owner == htab->params->stub_bfd)
13525 return TRUE;
13526
13527 BFD_ASSERT (is_ppc64_elf (input_bfd));
13528
13529 local_got_ents = elf_local_got_ents (input_bfd);
13530 TOCstart = elf_gp (output_bfd);
13531 symtab_hdr = &elf_symtab_hdr (input_bfd);
13532 sym_hashes = elf_sym_hashes (input_bfd);
13533 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13534
13535 rel = wrel = relocs;
13536 relend = relocs + input_section->reloc_count;
13537 for (; rel < relend; wrel++, rel++)
13538 {
13539 enum elf_ppc64_reloc_type r_type;
13540 bfd_vma addend;
13541 bfd_reloc_status_type r;
13542 Elf_Internal_Sym *sym;
13543 asection *sec;
13544 struct elf_link_hash_entry *h_elf;
13545 struct ppc_link_hash_entry *h;
13546 struct ppc_link_hash_entry *fdh;
13547 const char *sym_name;
13548 unsigned long r_symndx, toc_symndx;
13549 bfd_vma toc_addend;
13550 unsigned char tls_mask, tls_gd, tls_type;
13551 unsigned char sym_type;
13552 bfd_vma relocation;
13553 bfd_boolean unresolved_reloc;
13554 bfd_boolean warned;
13555 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13556 unsigned int insn;
13557 unsigned int mask;
13558 struct ppc_stub_hash_entry *stub_entry;
13559 bfd_vma max_br_offset;
13560 bfd_vma from;
13561 Elf_Internal_Rela orig_rel;
13562 reloc_howto_type *howto;
13563 struct reloc_howto_struct alt_howto;
13564
13565 again:
13566 orig_rel = *rel;
13567
13568 r_type = ELF64_R_TYPE (rel->r_info);
13569 r_symndx = ELF64_R_SYM (rel->r_info);
13570
13571 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13572 symbol of the previous ADDR64 reloc. The symbol gives us the
13573 proper TOC base to use. */
13574 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13575 && wrel != relocs
13576 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13577 && is_opd)
13578 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13579
13580 sym = NULL;
13581 sec = NULL;
13582 h_elf = NULL;
13583 sym_name = NULL;
13584 unresolved_reloc = FALSE;
13585 warned = FALSE;
13586
13587 if (r_symndx < symtab_hdr->sh_info)
13588 {
13589 /* It's a local symbol. */
13590 struct _opd_sec_data *opd;
13591
13592 sym = local_syms + r_symndx;
13593 sec = local_sections[r_symndx];
13594 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13595 sym_type = ELF64_ST_TYPE (sym->st_info);
13596 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13597 opd = get_opd_info (sec);
13598 if (opd != NULL && opd->adjust != NULL)
13599 {
13600 long adjust = opd->adjust[OPD_NDX (sym->st_value
13601 + rel->r_addend)];
13602 if (adjust == -1)
13603 relocation = 0;
13604 else
13605 {
13606 /* If this is a relocation against the opd section sym
13607 and we have edited .opd, adjust the reloc addend so
13608 that ld -r and ld --emit-relocs output is correct.
13609 If it is a reloc against some other .opd symbol,
13610 then the symbol value will be adjusted later. */
13611 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13612 rel->r_addend += adjust;
13613 else
13614 relocation += adjust;
13615 }
13616 }
13617 }
13618 else
13619 {
13620 bfd_boolean ignored;
13621
13622 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13623 r_symndx, symtab_hdr, sym_hashes,
13624 h_elf, sec, relocation,
13625 unresolved_reloc, warned, ignored);
13626 sym_name = h_elf->root.root.string;
13627 sym_type = h_elf->type;
13628 if (sec != NULL
13629 && sec->owner == output_bfd
13630 && strcmp (sec->name, ".opd") == 0)
13631 {
13632 /* This is a symbol defined in a linker script. All
13633 such are defined in output sections, even those
13634 defined by simple assignment from a symbol defined in
13635 an input section. Transfer the symbol to an
13636 appropriate input .opd section, so that a branch to
13637 this symbol will be mapped to the location specified
13638 by the opd entry. */
13639 struct bfd_link_order *lo;
13640 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13641 if (lo->type == bfd_indirect_link_order)
13642 {
13643 asection *isec = lo->u.indirect.section;
13644 if (h_elf->root.u.def.value >= isec->output_offset
13645 && h_elf->root.u.def.value < (isec->output_offset
13646 + isec->size))
13647 {
13648 h_elf->root.u.def.value -= isec->output_offset;
13649 h_elf->root.u.def.section = isec;
13650 sec = isec;
13651 break;
13652 }
13653 }
13654 }
13655 }
13656 h = (struct ppc_link_hash_entry *) h_elf;
13657
13658 if (sec != NULL && discarded_section (sec))
13659 {
13660 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13661 input_bfd, input_section,
13662 contents + rel->r_offset);
13663 wrel->r_offset = rel->r_offset;
13664 wrel->r_info = 0;
13665 wrel->r_addend = 0;
13666
13667 /* For ld -r, remove relocations in debug sections against
13668 sections defined in discarded sections. Not done for
13669 non-debug to preserve relocs in .eh_frame which the
13670 eh_frame editing code expects to be present. */
13671 if (bfd_link_relocatable (info)
13672 && (input_section->flags & SEC_DEBUGGING))
13673 wrel--;
13674
13675 continue;
13676 }
13677
13678 if (bfd_link_relocatable (info))
13679 goto copy_reloc;
13680
13681 if (h != NULL && &h->elf == htab->elf.hgot)
13682 {
13683 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13684 sec = bfd_abs_section_ptr;
13685 unresolved_reloc = FALSE;
13686 }
13687
13688 /* TLS optimizations. Replace instruction sequences and relocs
13689 based on information we collected in tls_optimize. We edit
13690 RELOCS so that --emit-relocs will output something sensible
13691 for the final instruction stream. */
13692 tls_mask = 0;
13693 tls_gd = 0;
13694 toc_symndx = 0;
13695 if (h != NULL)
13696 tls_mask = h->tls_mask;
13697 else if (local_got_ents != NULL)
13698 {
13699 struct plt_entry **local_plt = (struct plt_entry **)
13700 (local_got_ents + symtab_hdr->sh_info);
13701 unsigned char *lgot_masks = (unsigned char *)
13702 (local_plt + symtab_hdr->sh_info);
13703 tls_mask = lgot_masks[r_symndx];
13704 }
13705 if (tls_mask == 0
13706 && (r_type == R_PPC64_TLS
13707 || r_type == R_PPC64_TLSGD
13708 || r_type == R_PPC64_TLSLD))
13709 {
13710 /* Check for toc tls entries. */
13711 unsigned char *toc_tls;
13712
13713 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13714 &local_syms, rel, input_bfd))
13715 return FALSE;
13716
13717 if (toc_tls)
13718 tls_mask = *toc_tls;
13719 }
13720
13721 /* Check that tls relocs are used with tls syms, and non-tls
13722 relocs are used with non-tls syms. */
13723 if (r_symndx != STN_UNDEF
13724 && r_type != R_PPC64_NONE
13725 && (h == NULL
13726 || h->elf.root.type == bfd_link_hash_defined
13727 || h->elf.root.type == bfd_link_hash_defweak)
13728 && (IS_PPC64_TLS_RELOC (r_type)
13729 != (sym_type == STT_TLS
13730 || (sym_type == STT_SECTION
13731 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13732 {
13733 if (tls_mask != 0
13734 && (r_type == R_PPC64_TLS
13735 || r_type == R_PPC64_TLSGD
13736 || r_type == R_PPC64_TLSLD))
13737 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13738 ;
13739 else
13740 info->callbacks->einfo
13741 (!IS_PPC64_TLS_RELOC (r_type)
13742 /* xgettext:c-format */
13743 ? _("%H: %s used with TLS symbol `%T'\n")
13744 /* xgettext:c-format */
13745 : _("%H: %s used with non-TLS symbol `%T'\n"),
13746 input_bfd, input_section, rel->r_offset,
13747 ppc64_elf_howto_table[r_type]->name,
13748 sym_name);
13749 }
13750
13751 /* Ensure reloc mapping code below stays sane. */
13752 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13753 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13754 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13755 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13756 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13757 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13758 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13759 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13760 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13761 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13762 abort ();
13763
13764 switch (r_type)
13765 {
13766 default:
13767 break;
13768
13769 case R_PPC64_LO_DS_OPT:
13770 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13771 if ((insn & (0x3f << 26)) != 58u << 26)
13772 abort ();
13773 insn += (14u << 26) - (58u << 26);
13774 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13775 r_type = R_PPC64_TOC16_LO;
13776 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13777 break;
13778
13779 case R_PPC64_TOC16:
13780 case R_PPC64_TOC16_LO:
13781 case R_PPC64_TOC16_DS:
13782 case R_PPC64_TOC16_LO_DS:
13783 {
13784 /* Check for toc tls entries. */
13785 unsigned char *toc_tls;
13786 int retval;
13787
13788 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13789 &local_syms, rel, input_bfd);
13790 if (retval == 0)
13791 return FALSE;
13792
13793 if (toc_tls)
13794 {
13795 tls_mask = *toc_tls;
13796 if (r_type == R_PPC64_TOC16_DS
13797 || r_type == R_PPC64_TOC16_LO_DS)
13798 {
13799 if (tls_mask != 0
13800 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13801 goto toctprel;
13802 }
13803 else
13804 {
13805 /* If we found a GD reloc pair, then we might be
13806 doing a GD->IE transition. */
13807 if (retval == 2)
13808 {
13809 tls_gd = TLS_TPRELGD;
13810 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13811 goto tls_ldgd_opt;
13812 }
13813 else if (retval == 3)
13814 {
13815 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13816 goto tls_ldgd_opt;
13817 }
13818 }
13819 }
13820 }
13821 break;
13822
13823 case R_PPC64_GOT_TPREL16_HI:
13824 case R_PPC64_GOT_TPREL16_HA:
13825 if (tls_mask != 0
13826 && (tls_mask & TLS_TPREL) == 0)
13827 {
13828 rel->r_offset -= d_offset;
13829 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13830 r_type = R_PPC64_NONE;
13831 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13832 }
13833 break;
13834
13835 case R_PPC64_GOT_TPREL16_DS:
13836 case R_PPC64_GOT_TPREL16_LO_DS:
13837 if (tls_mask != 0
13838 && (tls_mask & TLS_TPREL) == 0)
13839 {
13840 toctprel:
13841 insn = bfd_get_32 (input_bfd,
13842 contents + rel->r_offset - d_offset);
13843 insn &= 31 << 21;
13844 insn |= 0x3c0d0000; /* addis 0,13,0 */
13845 bfd_put_32 (input_bfd, insn,
13846 contents + rel->r_offset - d_offset);
13847 r_type = R_PPC64_TPREL16_HA;
13848 if (toc_symndx != 0)
13849 {
13850 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13851 rel->r_addend = toc_addend;
13852 /* We changed the symbol. Start over in order to
13853 get h, sym, sec etc. right. */
13854 goto again;
13855 }
13856 else
13857 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13858 }
13859 break;
13860
13861 case R_PPC64_TLS:
13862 if (tls_mask != 0
13863 && (tls_mask & TLS_TPREL) == 0)
13864 {
13865 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13866 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13867 if (insn == 0)
13868 abort ();
13869 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13870 /* Was PPC64_TLS which sits on insn boundary, now
13871 PPC64_TPREL16_LO which is at low-order half-word. */
13872 rel->r_offset += d_offset;
13873 r_type = R_PPC64_TPREL16_LO;
13874 if (toc_symndx != 0)
13875 {
13876 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13877 rel->r_addend = toc_addend;
13878 /* We changed the symbol. Start over in order to
13879 get h, sym, sec etc. right. */
13880 goto again;
13881 }
13882 else
13883 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13884 }
13885 break;
13886
13887 case R_PPC64_GOT_TLSGD16_HI:
13888 case R_PPC64_GOT_TLSGD16_HA:
13889 tls_gd = TLS_TPRELGD;
13890 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13891 goto tls_gdld_hi;
13892 break;
13893
13894 case R_PPC64_GOT_TLSLD16_HI:
13895 case R_PPC64_GOT_TLSLD16_HA:
13896 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13897 {
13898 tls_gdld_hi:
13899 if ((tls_mask & tls_gd) != 0)
13900 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13901 + R_PPC64_GOT_TPREL16_DS);
13902 else
13903 {
13904 rel->r_offset -= d_offset;
13905 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13906 r_type = R_PPC64_NONE;
13907 }
13908 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13909 }
13910 break;
13911
13912 case R_PPC64_GOT_TLSGD16:
13913 case R_PPC64_GOT_TLSGD16_LO:
13914 tls_gd = TLS_TPRELGD;
13915 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13916 goto tls_ldgd_opt;
13917 break;
13918
13919 case R_PPC64_GOT_TLSLD16:
13920 case R_PPC64_GOT_TLSLD16_LO:
13921 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13922 {
13923 unsigned int insn1, insn2;
13924 bfd_vma offset;
13925
13926 tls_ldgd_opt:
13927 offset = (bfd_vma) -1;
13928 /* If not using the newer R_PPC64_TLSGD/LD to mark
13929 __tls_get_addr calls, we must trust that the call
13930 stays with its arg setup insns, ie. that the next
13931 reloc is the __tls_get_addr call associated with
13932 the current reloc. Edit both insns. */
13933 if (input_section->has_tls_get_addr_call
13934 && rel + 1 < relend
13935 && branch_reloc_hash_match (input_bfd, rel + 1,
13936 htab->tls_get_addr,
13937 htab->tls_get_addr_fd))
13938 offset = rel[1].r_offset;
13939 /* We read the low GOT_TLS (or TOC16) insn because we
13940 need to keep the destination reg. It may be
13941 something other than the usual r3, and moved to r3
13942 before the call by intervening code. */
13943 insn1 = bfd_get_32 (input_bfd,
13944 contents + rel->r_offset - d_offset);
13945 if ((tls_mask & tls_gd) != 0)
13946 {
13947 /* IE */
13948 insn1 &= (0x1f << 21) | (0x1f << 16);
13949 insn1 |= 58 << 26; /* ld */
13950 insn2 = 0x7c636a14; /* add 3,3,13 */
13951 if (offset != (bfd_vma) -1)
13952 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13953 if ((tls_mask & TLS_EXPLICIT) == 0)
13954 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13955 + R_PPC64_GOT_TPREL16_DS);
13956 else
13957 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13958 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13959 }
13960 else
13961 {
13962 /* LE */
13963 insn1 &= 0x1f << 21;
13964 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13965 insn2 = 0x38630000; /* addi 3,3,0 */
13966 if (tls_gd == 0)
13967 {
13968 /* Was an LD reloc. */
13969 if (toc_symndx)
13970 sec = local_sections[toc_symndx];
13971 for (r_symndx = 0;
13972 r_symndx < symtab_hdr->sh_info;
13973 r_symndx++)
13974 if (local_sections[r_symndx] == sec)
13975 break;
13976 if (r_symndx >= symtab_hdr->sh_info)
13977 r_symndx = STN_UNDEF;
13978 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13979 if (r_symndx != STN_UNDEF)
13980 rel->r_addend -= (local_syms[r_symndx].st_value
13981 + sec->output_offset
13982 + sec->output_section->vma);
13983 }
13984 else if (toc_symndx != 0)
13985 {
13986 r_symndx = toc_symndx;
13987 rel->r_addend = toc_addend;
13988 }
13989 r_type = R_PPC64_TPREL16_HA;
13990 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13991 if (offset != (bfd_vma) -1)
13992 {
13993 rel[1].r_info = ELF64_R_INFO (r_symndx,
13994 R_PPC64_TPREL16_LO);
13995 rel[1].r_offset = offset + d_offset;
13996 rel[1].r_addend = rel->r_addend;
13997 }
13998 }
13999 bfd_put_32 (input_bfd, insn1,
14000 contents + rel->r_offset - d_offset);
14001 if (offset != (bfd_vma) -1)
14002 bfd_put_32 (input_bfd, insn2, contents + offset);
14003 if ((tls_mask & tls_gd) == 0
14004 && (tls_gd == 0 || toc_symndx != 0))
14005 {
14006 /* We changed the symbol. Start over in order
14007 to get h, sym, sec etc. right. */
14008 goto again;
14009 }
14010 }
14011 break;
14012
14013 case R_PPC64_TLSGD:
14014 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
14015 {
14016 unsigned int insn2;
14017 bfd_vma offset = rel->r_offset;
14018
14019 if ((tls_mask & TLS_TPRELGD) != 0)
14020 {
14021 /* IE */
14022 r_type = R_PPC64_NONE;
14023 insn2 = 0x7c636a14; /* add 3,3,13 */
14024 }
14025 else
14026 {
14027 /* LE */
14028 if (toc_symndx != 0)
14029 {
14030 r_symndx = toc_symndx;
14031 rel->r_addend = toc_addend;
14032 }
14033 r_type = R_PPC64_TPREL16_LO;
14034 rel->r_offset = offset + d_offset;
14035 insn2 = 0x38630000; /* addi 3,3,0 */
14036 }
14037 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14038 /* Zap the reloc on the _tls_get_addr call too. */
14039 BFD_ASSERT (offset == rel[1].r_offset);
14040 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14041 bfd_put_32 (input_bfd, insn2, contents + offset);
14042 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14043 goto again;
14044 }
14045 break;
14046
14047 case R_PPC64_TLSLD:
14048 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
14049 {
14050 unsigned int insn2;
14051 bfd_vma offset = rel->r_offset;
14052
14053 if (toc_symndx)
14054 sec = local_sections[toc_symndx];
14055 for (r_symndx = 0;
14056 r_symndx < symtab_hdr->sh_info;
14057 r_symndx++)
14058 if (local_sections[r_symndx] == sec)
14059 break;
14060 if (r_symndx >= symtab_hdr->sh_info)
14061 r_symndx = STN_UNDEF;
14062 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14063 if (r_symndx != STN_UNDEF)
14064 rel->r_addend -= (local_syms[r_symndx].st_value
14065 + sec->output_offset
14066 + sec->output_section->vma);
14067
14068 r_type = R_PPC64_TPREL16_LO;
14069 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14070 rel->r_offset = offset + d_offset;
14071 /* Zap the reloc on the _tls_get_addr call too. */
14072 BFD_ASSERT (offset == rel[1].r_offset);
14073 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14074 insn2 = 0x38630000; /* addi 3,3,0 */
14075 bfd_put_32 (input_bfd, insn2, contents + offset);
14076 goto again;
14077 }
14078 break;
14079
14080 case R_PPC64_DTPMOD64:
14081 if (rel + 1 < relend
14082 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14083 && rel[1].r_offset == rel->r_offset + 8)
14084 {
14085 if ((tls_mask & TLS_GD) == 0)
14086 {
14087 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14088 if ((tls_mask & TLS_TPRELGD) != 0)
14089 r_type = R_PPC64_TPREL64;
14090 else
14091 {
14092 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14093 r_type = R_PPC64_NONE;
14094 }
14095 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14096 }
14097 }
14098 else
14099 {
14100 if ((tls_mask & TLS_LD) == 0)
14101 {
14102 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14103 r_type = R_PPC64_NONE;
14104 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14105 }
14106 }
14107 break;
14108
14109 case R_PPC64_TPREL64:
14110 if ((tls_mask & TLS_TPREL) == 0)
14111 {
14112 r_type = R_PPC64_NONE;
14113 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14114 }
14115 break;
14116
14117 case R_PPC64_ENTRY:
14118 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14119 if (!bfd_link_pic (info)
14120 && !info->traditional_format
14121 && relocation + 0x80008000 <= 0xffffffff)
14122 {
14123 unsigned int insn1, insn2;
14124
14125 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14126 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14127 if ((insn1 & ~0xfffc) == LD_R2_0R12
14128 && insn2 == ADD_R2_R2_R12)
14129 {
14130 bfd_put_32 (input_bfd,
14131 LIS_R2 + PPC_HA (relocation),
14132 contents + rel->r_offset);
14133 bfd_put_32 (input_bfd,
14134 ADDI_R2_R2 + PPC_LO (relocation),
14135 contents + rel->r_offset + 4);
14136 }
14137 }
14138 else
14139 {
14140 relocation -= (rel->r_offset
14141 + input_section->output_offset
14142 + input_section->output_section->vma);
14143 if (relocation + 0x80008000 <= 0xffffffff)
14144 {
14145 unsigned int insn1, insn2;
14146
14147 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14148 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14149 if ((insn1 & ~0xfffc) == LD_R2_0R12
14150 && insn2 == ADD_R2_R2_R12)
14151 {
14152 bfd_put_32 (input_bfd,
14153 ADDIS_R2_R12 + PPC_HA (relocation),
14154 contents + rel->r_offset);
14155 bfd_put_32 (input_bfd,
14156 ADDI_R2_R2 + PPC_LO (relocation),
14157 contents + rel->r_offset + 4);
14158 }
14159 }
14160 }
14161 break;
14162
14163 case R_PPC64_REL16_HA:
14164 /* If we are generating a non-PIC executable, edit
14165 . 0: addis 2,12,.TOC.-0b@ha
14166 . addi 2,2,.TOC.-0b@l
14167 used by ELFv2 global entry points to set up r2, to
14168 . lis 2,.TOC.@ha
14169 . addi 2,2,.TOC.@l
14170 if .TOC. is in range. */
14171 if (!bfd_link_pic (info)
14172 && !info->traditional_format
14173 && !htab->opd_abi
14174 && rel->r_addend == d_offset
14175 && h != NULL && &h->elf == htab->elf.hgot
14176 && rel + 1 < relend
14177 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14178 && rel[1].r_offset == rel->r_offset + 4
14179 && rel[1].r_addend == rel->r_addend + 4
14180 && relocation + 0x80008000 <= 0xffffffff)
14181 {
14182 unsigned int insn1, insn2;
14183 bfd_vma offset = rel->r_offset - d_offset;
14184 insn1 = bfd_get_32 (input_bfd, contents + offset);
14185 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14186 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14187 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14188 {
14189 r_type = R_PPC64_ADDR16_HA;
14190 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14191 rel->r_addend -= d_offset;
14192 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14193 rel[1].r_addend -= d_offset + 4;
14194 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14195 }
14196 }
14197 break;
14198 }
14199
14200 /* Handle other relocations that tweak non-addend part of insn. */
14201 insn = 0;
14202 max_br_offset = 1 << 25;
14203 addend = rel->r_addend;
14204 reloc_dest = DEST_NORMAL;
14205 switch (r_type)
14206 {
14207 default:
14208 break;
14209
14210 case R_PPC64_TOCSAVE:
14211 if (relocation + addend == (rel->r_offset
14212 + input_section->output_offset
14213 + input_section->output_section->vma)
14214 && tocsave_find (htab, NO_INSERT,
14215 &local_syms, rel, input_bfd))
14216 {
14217 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14218 if (insn == NOP
14219 || insn == CROR_151515 || insn == CROR_313131)
14220 bfd_put_32 (input_bfd,
14221 STD_R2_0R1 + STK_TOC (htab),
14222 contents + rel->r_offset);
14223 }
14224 break;
14225
14226 /* Branch taken prediction relocations. */
14227 case R_PPC64_ADDR14_BRTAKEN:
14228 case R_PPC64_REL14_BRTAKEN:
14229 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14230 /* Fall through. */
14231
14232 /* Branch not taken prediction relocations. */
14233 case R_PPC64_ADDR14_BRNTAKEN:
14234 case R_PPC64_REL14_BRNTAKEN:
14235 insn |= bfd_get_32 (input_bfd,
14236 contents + rel->r_offset) & ~(0x01 << 21);
14237 /* Fall through. */
14238
14239 case R_PPC64_REL14:
14240 max_br_offset = 1 << 15;
14241 /* Fall through. */
14242
14243 case R_PPC64_REL24:
14244 /* Calls to functions with a different TOC, such as calls to
14245 shared objects, need to alter the TOC pointer. This is
14246 done using a linkage stub. A REL24 branching to these
14247 linkage stubs needs to be followed by a nop, as the nop
14248 will be replaced with an instruction to restore the TOC
14249 base pointer. */
14250 fdh = h;
14251 if (h != NULL
14252 && h->oh != NULL
14253 && h->oh->is_func_descriptor)
14254 fdh = ppc_follow_link (h->oh);
14255 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14256 htab);
14257 if (stub_entry != NULL
14258 && (stub_entry->stub_type == ppc_stub_plt_call
14259 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14260 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14261 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14262 {
14263 bfd_boolean can_plt_call = FALSE;
14264
14265 if (stub_entry->stub_type == ppc_stub_plt_call
14266 && !htab->opd_abi
14267 && htab->params->plt_localentry0 != 0
14268 && is_elfv2_localentry0 (&h->elf))
14269 {
14270 /* The function doesn't use or change r2. */
14271 can_plt_call = TRUE;
14272 }
14273
14274 /* All of these stubs may modify r2, so there must be a
14275 branch and link followed by a nop. The nop is
14276 replaced by an insn to restore r2. */
14277 else if (rel->r_offset + 8 <= input_section->size)
14278 {
14279 unsigned long br;
14280
14281 br = bfd_get_32 (input_bfd,
14282 contents + rel->r_offset);
14283 if ((br & 1) != 0)
14284 {
14285 unsigned long nop;
14286
14287 nop = bfd_get_32 (input_bfd,
14288 contents + rel->r_offset + 4);
14289 if (nop == NOP
14290 || nop == CROR_151515 || nop == CROR_313131)
14291 {
14292 if (h != NULL
14293 && (h == htab->tls_get_addr_fd
14294 || h == htab->tls_get_addr)
14295 && htab->params->tls_get_addr_opt)
14296 {
14297 /* Special stub used, leave nop alone. */
14298 }
14299 else
14300 bfd_put_32 (input_bfd,
14301 LD_R2_0R1 + STK_TOC (htab),
14302 contents + rel->r_offset + 4);
14303 can_plt_call = TRUE;
14304 }
14305 }
14306 }
14307
14308 if (!can_plt_call && h != NULL)
14309 {
14310 const char *name = h->elf.root.root.string;
14311
14312 if (*name == '.')
14313 ++name;
14314
14315 if (strncmp (name, "__libc_start_main", 17) == 0
14316 && (name[17] == 0 || name[17] == '@'))
14317 {
14318 /* Allow crt1 branch to go via a toc adjusting
14319 stub. Other calls that never return could do
14320 the same, if we could detect such. */
14321 can_plt_call = TRUE;
14322 }
14323 }
14324
14325 if (!can_plt_call)
14326 {
14327 /* g++ as of 20130507 emits self-calls without a
14328 following nop. This is arguably wrong since we
14329 have conflicting information. On the one hand a
14330 global symbol and on the other a local call
14331 sequence, but don't error for this special case.
14332 It isn't possible to cheaply verify we have
14333 exactly such a call. Allow all calls to the same
14334 section. */
14335 asection *code_sec = sec;
14336
14337 if (get_opd_info (sec) != NULL)
14338 {
14339 bfd_vma off = (relocation + addend
14340 - sec->output_section->vma
14341 - sec->output_offset);
14342
14343 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14344 }
14345 if (code_sec == input_section)
14346 can_plt_call = TRUE;
14347 }
14348
14349 if (!can_plt_call)
14350 {
14351 if (stub_entry->stub_type == ppc_stub_plt_call
14352 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14353 info->callbacks->einfo
14354 /* xgettext:c-format */
14355 (_("%H: call to `%T' lacks nop, can't restore toc; "
14356 "recompile with -fPIC\n"),
14357 input_bfd, input_section, rel->r_offset, sym_name);
14358 else
14359 info->callbacks->einfo
14360 /* xgettext:c-format */
14361 (_("%H: call to `%T' lacks nop, can't restore toc; "
14362 "(-mcmodel=small toc adjust stub)\n"),
14363 input_bfd, input_section, rel->r_offset, sym_name);
14364
14365 bfd_set_error (bfd_error_bad_value);
14366 ret = FALSE;
14367 }
14368
14369 if (can_plt_call
14370 && (stub_entry->stub_type == ppc_stub_plt_call
14371 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14372 unresolved_reloc = FALSE;
14373 }
14374
14375 if ((stub_entry == NULL
14376 || stub_entry->stub_type == ppc_stub_long_branch
14377 || stub_entry->stub_type == ppc_stub_plt_branch)
14378 && get_opd_info (sec) != NULL)
14379 {
14380 /* The branch destination is the value of the opd entry. */
14381 bfd_vma off = (relocation + addend
14382 - sec->output_section->vma
14383 - sec->output_offset);
14384 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14385 if (dest != (bfd_vma) -1)
14386 {
14387 relocation = dest;
14388 addend = 0;
14389 reloc_dest = DEST_OPD;
14390 }
14391 }
14392
14393 /* If the branch is out of reach we ought to have a long
14394 branch stub. */
14395 from = (rel->r_offset
14396 + input_section->output_offset
14397 + input_section->output_section->vma);
14398
14399 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14400 ? fdh->elf.other
14401 : sym->st_other);
14402
14403 if (stub_entry != NULL
14404 && (stub_entry->stub_type == ppc_stub_long_branch
14405 || stub_entry->stub_type == ppc_stub_plt_branch)
14406 && (r_type == R_PPC64_ADDR14_BRTAKEN
14407 || r_type == R_PPC64_ADDR14_BRNTAKEN
14408 || (relocation + addend - from + max_br_offset
14409 < 2 * max_br_offset)))
14410 /* Don't use the stub if this branch is in range. */
14411 stub_entry = NULL;
14412
14413 if (stub_entry != NULL)
14414 {
14415 /* Munge up the value and addend so that we call the stub
14416 rather than the procedure directly. */
14417 asection *stub_sec = stub_entry->group->stub_sec;
14418
14419 if (stub_entry->stub_type == ppc_stub_save_res)
14420 relocation += (stub_sec->output_offset
14421 + stub_sec->output_section->vma
14422 + stub_sec->size - htab->sfpr->size
14423 - htab->sfpr->output_offset
14424 - htab->sfpr->output_section->vma);
14425 else
14426 relocation = (stub_entry->stub_offset
14427 + stub_sec->output_offset
14428 + stub_sec->output_section->vma);
14429 addend = 0;
14430 reloc_dest = DEST_STUB;
14431
14432 if ((stub_entry->stub_type == ppc_stub_plt_call
14433 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14434 && (ALWAYS_EMIT_R2SAVE
14435 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14436 && rel + 1 < relend
14437 && rel[1].r_offset == rel->r_offset + 4
14438 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14439 relocation += 4;
14440 }
14441
14442 if (insn != 0)
14443 {
14444 if (is_isa_v2)
14445 {
14446 /* Set 'a' bit. This is 0b00010 in BO field for branch
14447 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14448 for branch on CTR insns (BO == 1a00t or 1a01t). */
14449 if ((insn & (0x14 << 21)) == (0x04 << 21))
14450 insn |= 0x02 << 21;
14451 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14452 insn |= 0x08 << 21;
14453 else
14454 break;
14455 }
14456 else
14457 {
14458 /* Invert 'y' bit if not the default. */
14459 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14460 insn ^= 0x01 << 21;
14461 }
14462
14463 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14464 }
14465
14466 /* NOP out calls to undefined weak functions.
14467 We can thus call a weak function without first
14468 checking whether the function is defined. */
14469 else if (h != NULL
14470 && h->elf.root.type == bfd_link_hash_undefweak
14471 && h->elf.dynindx == -1
14472 && r_type == R_PPC64_REL24
14473 && relocation == 0
14474 && addend == 0)
14475 {
14476 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14477 goto copy_reloc;
14478 }
14479 break;
14480 }
14481
14482 /* Set `addend'. */
14483 tls_type = 0;
14484 switch (r_type)
14485 {
14486 default:
14487 info->callbacks->einfo
14488 /* xgettext:c-format */
14489 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14490 input_bfd, (int) r_type, sym_name);
14491
14492 bfd_set_error (bfd_error_bad_value);
14493 ret = FALSE;
14494 goto copy_reloc;
14495
14496 case R_PPC64_NONE:
14497 case R_PPC64_TLS:
14498 case R_PPC64_TLSGD:
14499 case R_PPC64_TLSLD:
14500 case R_PPC64_TOCSAVE:
14501 case R_PPC64_GNU_VTINHERIT:
14502 case R_PPC64_GNU_VTENTRY:
14503 case R_PPC64_ENTRY:
14504 goto copy_reloc;
14505
14506 /* GOT16 relocations. Like an ADDR16 using the symbol's
14507 address in the GOT as relocation value instead of the
14508 symbol's value itself. Also, create a GOT entry for the
14509 symbol and put the symbol value there. */
14510 case R_PPC64_GOT_TLSGD16:
14511 case R_PPC64_GOT_TLSGD16_LO:
14512 case R_PPC64_GOT_TLSGD16_HI:
14513 case R_PPC64_GOT_TLSGD16_HA:
14514 tls_type = TLS_TLS | TLS_GD;
14515 goto dogot;
14516
14517 case R_PPC64_GOT_TLSLD16:
14518 case R_PPC64_GOT_TLSLD16_LO:
14519 case R_PPC64_GOT_TLSLD16_HI:
14520 case R_PPC64_GOT_TLSLD16_HA:
14521 tls_type = TLS_TLS | TLS_LD;
14522 goto dogot;
14523
14524 case R_PPC64_GOT_TPREL16_DS:
14525 case R_PPC64_GOT_TPREL16_LO_DS:
14526 case R_PPC64_GOT_TPREL16_HI:
14527 case R_PPC64_GOT_TPREL16_HA:
14528 tls_type = TLS_TLS | TLS_TPREL;
14529 goto dogot;
14530
14531 case R_PPC64_GOT_DTPREL16_DS:
14532 case R_PPC64_GOT_DTPREL16_LO_DS:
14533 case R_PPC64_GOT_DTPREL16_HI:
14534 case R_PPC64_GOT_DTPREL16_HA:
14535 tls_type = TLS_TLS | TLS_DTPREL;
14536 goto dogot;
14537
14538 case R_PPC64_GOT16:
14539 case R_PPC64_GOT16_LO:
14540 case R_PPC64_GOT16_HI:
14541 case R_PPC64_GOT16_HA:
14542 case R_PPC64_GOT16_DS:
14543 case R_PPC64_GOT16_LO_DS:
14544 dogot:
14545 {
14546 /* Relocation is to the entry for this symbol in the global
14547 offset table. */
14548 asection *got;
14549 bfd_vma *offp;
14550 bfd_vma off;
14551 unsigned long indx = 0;
14552 struct got_entry *ent;
14553
14554 if (tls_type == (TLS_TLS | TLS_LD)
14555 && (h == NULL
14556 || !h->elf.def_dynamic))
14557 ent = ppc64_tlsld_got (input_bfd);
14558 else
14559 {
14560 if (h != NULL)
14561 {
14562 if (!htab->elf.dynamic_sections_created
14563 || h->elf.dynindx == -1
14564 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14565 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14566 /* This is actually a static link, or it is a
14567 -Bsymbolic link and the symbol is defined
14568 locally, or the symbol was forced to be local
14569 because of a version file. */
14570 ;
14571 else
14572 {
14573 indx = h->elf.dynindx;
14574 unresolved_reloc = FALSE;
14575 }
14576 ent = h->elf.got.glist;
14577 }
14578 else
14579 {
14580 if (local_got_ents == NULL)
14581 abort ();
14582 ent = local_got_ents[r_symndx];
14583 }
14584
14585 for (; ent != NULL; ent = ent->next)
14586 if (ent->addend == orig_rel.r_addend
14587 && ent->owner == input_bfd
14588 && ent->tls_type == tls_type)
14589 break;
14590 }
14591
14592 if (ent == NULL)
14593 abort ();
14594 if (ent->is_indirect)
14595 ent = ent->got.ent;
14596 offp = &ent->got.offset;
14597 got = ppc64_elf_tdata (ent->owner)->got;
14598 if (got == NULL)
14599 abort ();
14600
14601 /* The offset must always be a multiple of 8. We use the
14602 least significant bit to record whether we have already
14603 processed this entry. */
14604 off = *offp;
14605 if ((off & 1) != 0)
14606 off &= ~1;
14607 else
14608 {
14609 /* Generate relocs for the dynamic linker, except in
14610 the case of TLSLD where we'll use one entry per
14611 module. */
14612 asection *relgot;
14613 bfd_boolean ifunc;
14614
14615 *offp = off | 1;
14616 relgot = NULL;
14617 ifunc = (h != NULL
14618 ? h->elf.type == STT_GNU_IFUNC
14619 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14620 if (ifunc)
14621 {
14622 relgot = htab->elf.irelplt;
14623 if (indx == 0)
14624 htab->local_ifunc_resolver = 1;
14625 else if (is_static_defined (&h->elf))
14626 htab->maybe_local_ifunc_resolver = 1;
14627 }
14628 else if (indx != 0
14629 || (bfd_link_pic (info)
14630 && (h == NULL
14631 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14632 || (tls_type == (TLS_TLS | TLS_LD)
14633 && !h->elf.def_dynamic))))
14634 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14635 if (relgot != NULL)
14636 {
14637 outrel.r_offset = (got->output_section->vma
14638 + got->output_offset
14639 + off);
14640 outrel.r_addend = addend;
14641 if (tls_type & (TLS_LD | TLS_GD))
14642 {
14643 outrel.r_addend = 0;
14644 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14645 if (tls_type == (TLS_TLS | TLS_GD))
14646 {
14647 loc = relgot->contents;
14648 loc += (relgot->reloc_count++
14649 * sizeof (Elf64_External_Rela));
14650 bfd_elf64_swap_reloca_out (output_bfd,
14651 &outrel, loc);
14652 outrel.r_offset += 8;
14653 outrel.r_addend = addend;
14654 outrel.r_info
14655 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14656 }
14657 }
14658 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14659 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14660 else if (tls_type == (TLS_TLS | TLS_TPREL))
14661 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14662 else if (indx != 0)
14663 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14664 else
14665 {
14666 if (ifunc)
14667 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14668 else
14669 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14670
14671 /* Write the .got section contents for the sake
14672 of prelink. */
14673 loc = got->contents + off;
14674 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14675 loc);
14676 }
14677
14678 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14679 {
14680 outrel.r_addend += relocation;
14681 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14682 {
14683 if (htab->elf.tls_sec == NULL)
14684 outrel.r_addend = 0;
14685 else
14686 outrel.r_addend -= htab->elf.tls_sec->vma;
14687 }
14688 }
14689 loc = relgot->contents;
14690 loc += (relgot->reloc_count++
14691 * sizeof (Elf64_External_Rela));
14692 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14693 }
14694
14695 /* Init the .got section contents here if we're not
14696 emitting a reloc. */
14697 else
14698 {
14699 relocation += addend;
14700 if (tls_type != 0)
14701 {
14702 if (htab->elf.tls_sec == NULL)
14703 relocation = 0;
14704 else
14705 {
14706 if (tls_type & TLS_LD)
14707 relocation = 0;
14708 else
14709 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14710 if (tls_type & TLS_TPREL)
14711 relocation += DTP_OFFSET - TP_OFFSET;
14712 }
14713
14714 if (tls_type & (TLS_GD | TLS_LD))
14715 {
14716 bfd_put_64 (output_bfd, relocation,
14717 got->contents + off + 8);
14718 relocation = 1;
14719 }
14720 }
14721 bfd_put_64 (output_bfd, relocation,
14722 got->contents + off);
14723 }
14724 }
14725
14726 if (off >= (bfd_vma) -2)
14727 abort ();
14728
14729 relocation = got->output_section->vma + got->output_offset + off;
14730 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14731 }
14732 break;
14733
14734 case R_PPC64_PLT16_HA:
14735 case R_PPC64_PLT16_HI:
14736 case R_PPC64_PLT16_LO:
14737 case R_PPC64_PLT32:
14738 case R_PPC64_PLT64:
14739 /* Relocation is to the entry for this symbol in the
14740 procedure linkage table. */
14741 {
14742 struct plt_entry **plt_list = NULL;
14743 if (h != NULL)
14744 plt_list = &h->elf.plt.plist;
14745 else if (local_got_ents != NULL)
14746 {
14747 struct plt_entry **local_plt = (struct plt_entry **)
14748 (local_got_ents + symtab_hdr->sh_info);
14749 unsigned char *local_got_tls_masks = (unsigned char *)
14750 (local_plt + symtab_hdr->sh_info);
14751 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14752 plt_list = local_plt + r_symndx;
14753 }
14754 if (plt_list)
14755 {
14756 struct plt_entry *ent;
14757
14758 for (ent = *plt_list; ent != NULL; ent = ent->next)
14759 if (ent->plt.offset != (bfd_vma) -1
14760 && ent->addend == orig_rel.r_addend)
14761 {
14762 asection *plt;
14763
14764 plt = htab->elf.splt;
14765 if (!htab->elf.dynamic_sections_created
14766 || h == NULL
14767 || h->elf.dynindx == -1)
14768 plt = htab->elf.iplt;
14769 relocation = (plt->output_section->vma
14770 + plt->output_offset
14771 + ent->plt.offset);
14772 addend = 0;
14773 unresolved_reloc = FALSE;
14774 break;
14775 }
14776 }
14777 }
14778 break;
14779
14780 case R_PPC64_TOC:
14781 /* Relocation value is TOC base. */
14782 relocation = TOCstart;
14783 if (r_symndx == STN_UNDEF)
14784 relocation += htab->sec_info[input_section->id].toc_off;
14785 else if (unresolved_reloc)
14786 ;
14787 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14788 relocation += htab->sec_info[sec->id].toc_off;
14789 else
14790 unresolved_reloc = TRUE;
14791 goto dodyn;
14792
14793 /* TOC16 relocs. We want the offset relative to the TOC base,
14794 which is the address of the start of the TOC plus 0x8000.
14795 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14796 in this order. */
14797 case R_PPC64_TOC16:
14798 case R_PPC64_TOC16_LO:
14799 case R_PPC64_TOC16_HI:
14800 case R_PPC64_TOC16_DS:
14801 case R_PPC64_TOC16_LO_DS:
14802 case R_PPC64_TOC16_HA:
14803 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14804 break;
14805
14806 /* Relocate against the beginning of the section. */
14807 case R_PPC64_SECTOFF:
14808 case R_PPC64_SECTOFF_LO:
14809 case R_PPC64_SECTOFF_HI:
14810 case R_PPC64_SECTOFF_DS:
14811 case R_PPC64_SECTOFF_LO_DS:
14812 case R_PPC64_SECTOFF_HA:
14813 if (sec != NULL)
14814 addend -= sec->output_section->vma;
14815 break;
14816
14817 case R_PPC64_REL16:
14818 case R_PPC64_REL16_LO:
14819 case R_PPC64_REL16_HI:
14820 case R_PPC64_REL16_HA:
14821 case R_PPC64_REL16DX_HA:
14822 break;
14823
14824 case R_PPC64_REL14:
14825 case R_PPC64_REL14_BRNTAKEN:
14826 case R_PPC64_REL14_BRTAKEN:
14827 case R_PPC64_REL24:
14828 break;
14829
14830 case R_PPC64_TPREL16:
14831 case R_PPC64_TPREL16_LO:
14832 case R_PPC64_TPREL16_HI:
14833 case R_PPC64_TPREL16_HA:
14834 case R_PPC64_TPREL16_DS:
14835 case R_PPC64_TPREL16_LO_DS:
14836 case R_PPC64_TPREL16_HIGH:
14837 case R_PPC64_TPREL16_HIGHA:
14838 case R_PPC64_TPREL16_HIGHER:
14839 case R_PPC64_TPREL16_HIGHERA:
14840 case R_PPC64_TPREL16_HIGHEST:
14841 case R_PPC64_TPREL16_HIGHESTA:
14842 if (h != NULL
14843 && h->elf.root.type == bfd_link_hash_undefweak
14844 && h->elf.dynindx == -1)
14845 {
14846 /* Make this relocation against an undefined weak symbol
14847 resolve to zero. This is really just a tweak, since
14848 code using weak externs ought to check that they are
14849 defined before using them. */
14850 bfd_byte *p = contents + rel->r_offset - d_offset;
14851
14852 insn = bfd_get_32 (input_bfd, p);
14853 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14854 if (insn != 0)
14855 bfd_put_32 (input_bfd, insn, p);
14856 break;
14857 }
14858 if (htab->elf.tls_sec != NULL)
14859 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14860 /* The TPREL16 relocs shouldn't really be used in shared
14861 libs or with non-local symbols as that will result in
14862 DT_TEXTREL being set, but support them anyway. */
14863 goto dodyn;
14864
14865 case R_PPC64_DTPREL16:
14866 case R_PPC64_DTPREL16_LO:
14867 case R_PPC64_DTPREL16_HI:
14868 case R_PPC64_DTPREL16_HA:
14869 case R_PPC64_DTPREL16_DS:
14870 case R_PPC64_DTPREL16_LO_DS:
14871 case R_PPC64_DTPREL16_HIGH:
14872 case R_PPC64_DTPREL16_HIGHA:
14873 case R_PPC64_DTPREL16_HIGHER:
14874 case R_PPC64_DTPREL16_HIGHERA:
14875 case R_PPC64_DTPREL16_HIGHEST:
14876 case R_PPC64_DTPREL16_HIGHESTA:
14877 if (htab->elf.tls_sec != NULL)
14878 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14879 break;
14880
14881 case R_PPC64_ADDR64_LOCAL:
14882 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14883 ? h->elf.other
14884 : sym->st_other);
14885 break;
14886
14887 case R_PPC64_DTPMOD64:
14888 relocation = 1;
14889 addend = 0;
14890 goto dodyn;
14891
14892 case R_PPC64_TPREL64:
14893 if (htab->elf.tls_sec != NULL)
14894 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14895 goto dodyn;
14896
14897 case R_PPC64_DTPREL64:
14898 if (htab->elf.tls_sec != NULL)
14899 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14900 /* Fall through. */
14901
14902 /* Relocations that may need to be propagated if this is a
14903 dynamic object. */
14904 case R_PPC64_REL30:
14905 case R_PPC64_REL32:
14906 case R_PPC64_REL64:
14907 case R_PPC64_ADDR14:
14908 case R_PPC64_ADDR14_BRNTAKEN:
14909 case R_PPC64_ADDR14_BRTAKEN:
14910 case R_PPC64_ADDR16:
14911 case R_PPC64_ADDR16_DS:
14912 case R_PPC64_ADDR16_HA:
14913 case R_PPC64_ADDR16_HI:
14914 case R_PPC64_ADDR16_HIGH:
14915 case R_PPC64_ADDR16_HIGHA:
14916 case R_PPC64_ADDR16_HIGHER:
14917 case R_PPC64_ADDR16_HIGHERA:
14918 case R_PPC64_ADDR16_HIGHEST:
14919 case R_PPC64_ADDR16_HIGHESTA:
14920 case R_PPC64_ADDR16_LO:
14921 case R_PPC64_ADDR16_LO_DS:
14922 case R_PPC64_ADDR24:
14923 case R_PPC64_ADDR32:
14924 case R_PPC64_ADDR64:
14925 case R_PPC64_UADDR16:
14926 case R_PPC64_UADDR32:
14927 case R_PPC64_UADDR64:
14928 dodyn:
14929 if ((input_section->flags & SEC_ALLOC) == 0)
14930 break;
14931
14932 if (NO_OPD_RELOCS && is_opd)
14933 break;
14934
14935 if (bfd_link_pic (info)
14936 ? ((h == NULL
14937 || h->dyn_relocs != NULL)
14938 && ((h != NULL && pc_dynrelocs (h))
14939 || must_be_dyn_reloc (info, r_type)))
14940 : (h != NULL
14941 ? h->dyn_relocs != NULL
14942 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14943 {
14944 bfd_boolean skip, relocate;
14945 asection *sreloc;
14946 bfd_vma out_off;
14947 long indx = 0;
14948
14949 /* When generating a dynamic object, these relocations
14950 are copied into the output file to be resolved at run
14951 time. */
14952
14953 skip = FALSE;
14954 relocate = FALSE;
14955
14956 out_off = _bfd_elf_section_offset (output_bfd, info,
14957 input_section, rel->r_offset);
14958 if (out_off == (bfd_vma) -1)
14959 skip = TRUE;
14960 else if (out_off == (bfd_vma) -2)
14961 skip = TRUE, relocate = TRUE;
14962 out_off += (input_section->output_section->vma
14963 + input_section->output_offset);
14964 outrel.r_offset = out_off;
14965 outrel.r_addend = rel->r_addend;
14966
14967 /* Optimize unaligned reloc use. */
14968 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14969 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14970 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14971 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14972 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14973 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14974 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14975 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14976 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14977
14978 if (skip)
14979 memset (&outrel, 0, sizeof outrel);
14980 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14981 && !is_opd
14982 && r_type != R_PPC64_TOC)
14983 {
14984 indx = h->elf.dynindx;
14985 BFD_ASSERT (indx != -1);
14986 outrel.r_info = ELF64_R_INFO (indx, r_type);
14987 }
14988 else
14989 {
14990 /* This symbol is local, or marked to become local,
14991 or this is an opd section reloc which must point
14992 at a local function. */
14993 outrel.r_addend += relocation;
14994 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14995 {
14996 if (is_opd && h != NULL)
14997 {
14998 /* Lie about opd entries. This case occurs
14999 when building shared libraries and we
15000 reference a function in another shared
15001 lib. The same thing happens for a weak
15002 definition in an application that's
15003 overridden by a strong definition in a
15004 shared lib. (I believe this is a generic
15005 bug in binutils handling of weak syms.)
15006 In these cases we won't use the opd
15007 entry in this lib. */
15008 unresolved_reloc = FALSE;
15009 }
15010 if (!is_opd
15011 && r_type == R_PPC64_ADDR64
15012 && (h != NULL
15013 ? h->elf.type == STT_GNU_IFUNC
15014 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15015 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15016 else
15017 {
15018 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15019
15020 /* We need to relocate .opd contents for ld.so.
15021 Prelink also wants simple and consistent rules
15022 for relocs. This make all RELATIVE relocs have
15023 *r_offset equal to r_addend. */
15024 relocate = TRUE;
15025 }
15026 }
15027 else
15028 {
15029 if (h != NULL
15030 ? h->elf.type == STT_GNU_IFUNC
15031 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15032 {
15033 info->callbacks->einfo
15034 /* xgettext:c-format */
15035 (_("%H: %s for indirect "
15036 "function `%T' unsupported\n"),
15037 input_bfd, input_section, rel->r_offset,
15038 ppc64_elf_howto_table[r_type]->name,
15039 sym_name);
15040 ret = FALSE;
15041 }
15042 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15043 ;
15044 else if (sec == NULL || sec->owner == NULL)
15045 {
15046 bfd_set_error (bfd_error_bad_value);
15047 return FALSE;
15048 }
15049 else
15050 {
15051 asection *osec;
15052
15053 osec = sec->output_section;
15054 indx = elf_section_data (osec)->dynindx;
15055
15056 if (indx == 0)
15057 {
15058 if ((osec->flags & SEC_READONLY) == 0
15059 && htab->elf.data_index_section != NULL)
15060 osec = htab->elf.data_index_section;
15061 else
15062 osec = htab->elf.text_index_section;
15063 indx = elf_section_data (osec)->dynindx;
15064 }
15065 BFD_ASSERT (indx != 0);
15066
15067 /* We are turning this relocation into one
15068 against a section symbol, so subtract out
15069 the output section's address but not the
15070 offset of the input section in the output
15071 section. */
15072 outrel.r_addend -= osec->vma;
15073 }
15074
15075 outrel.r_info = ELF64_R_INFO (indx, r_type);
15076 }
15077 }
15078
15079 sreloc = elf_section_data (input_section)->sreloc;
15080 if (h != NULL
15081 ? h->elf.type == STT_GNU_IFUNC
15082 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15083 {
15084 sreloc = htab->elf.irelplt;
15085 if (indx == 0)
15086 htab->local_ifunc_resolver = 1;
15087 else if (is_static_defined (&h->elf))
15088 htab->maybe_local_ifunc_resolver = 1;
15089 }
15090 if (sreloc == NULL)
15091 abort ();
15092
15093 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15094 >= sreloc->size)
15095 abort ();
15096 loc = sreloc->contents;
15097 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15098 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15099
15100 /* If this reloc is against an external symbol, it will
15101 be computed at runtime, so there's no need to do
15102 anything now. However, for the sake of prelink ensure
15103 that the section contents are a known value. */
15104 if (! relocate)
15105 {
15106 unresolved_reloc = FALSE;
15107 /* The value chosen here is quite arbitrary as ld.so
15108 ignores section contents except for the special
15109 case of .opd where the contents might be accessed
15110 before relocation. Choose zero, as that won't
15111 cause reloc overflow. */
15112 relocation = 0;
15113 addend = 0;
15114 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15115 to improve backward compatibility with older
15116 versions of ld. */
15117 if (r_type == R_PPC64_ADDR64)
15118 addend = outrel.r_addend;
15119 /* Adjust pc_relative relocs to have zero in *r_offset. */
15120 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15121 addend = outrel.r_offset;
15122 }
15123 }
15124 break;
15125
15126 case R_PPC64_COPY:
15127 case R_PPC64_GLOB_DAT:
15128 case R_PPC64_JMP_SLOT:
15129 case R_PPC64_JMP_IREL:
15130 case R_PPC64_RELATIVE:
15131 /* We shouldn't ever see these dynamic relocs in relocatable
15132 files. */
15133 /* Fall through. */
15134
15135 case R_PPC64_PLTGOT16:
15136 case R_PPC64_PLTGOT16_DS:
15137 case R_PPC64_PLTGOT16_HA:
15138 case R_PPC64_PLTGOT16_HI:
15139 case R_PPC64_PLTGOT16_LO:
15140 case R_PPC64_PLTGOT16_LO_DS:
15141 case R_PPC64_PLTREL32:
15142 case R_PPC64_PLTREL64:
15143 /* These ones haven't been implemented yet. */
15144
15145 info->callbacks->einfo
15146 /* xgettext:c-format */
15147 (_("%P: %B: %s is not supported for `%T'\n"),
15148 input_bfd,
15149 ppc64_elf_howto_table[r_type]->name, sym_name);
15150
15151 bfd_set_error (bfd_error_invalid_operation);
15152 ret = FALSE;
15153 goto copy_reloc;
15154 }
15155
15156 /* Multi-instruction sequences that access the TOC can be
15157 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15158 to nop; addi rb,r2,x; */
15159 howto = ppc64_elf_howto_table[(int) r_type];
15160 switch (r_type)
15161 {
15162 default:
15163 break;
15164
15165 case R_PPC64_GOT_TLSLD16_HI:
15166 case R_PPC64_GOT_TLSGD16_HI:
15167 case R_PPC64_GOT_TPREL16_HI:
15168 case R_PPC64_GOT_DTPREL16_HI:
15169 case R_PPC64_GOT16_HI:
15170 case R_PPC64_TOC16_HI:
15171 /* These relocs would only be useful if building up an
15172 offset to later add to r2, perhaps in an indexed
15173 addressing mode instruction. Don't try to optimize.
15174 Unfortunately, the possibility of someone building up an
15175 offset like this or even with the HA relocs, means that
15176 we need to check the high insn when optimizing the low
15177 insn. */
15178 break;
15179
15180 case R_PPC64_GOT_TLSLD16_HA:
15181 case R_PPC64_GOT_TLSGD16_HA:
15182 case R_PPC64_GOT_TPREL16_HA:
15183 case R_PPC64_GOT_DTPREL16_HA:
15184 case R_PPC64_GOT16_HA:
15185 case R_PPC64_TOC16_HA:
15186 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15187 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15188 {
15189 bfd_byte *p = contents + (rel->r_offset & ~3);
15190 bfd_put_32 (input_bfd, NOP, p);
15191 }
15192 break;
15193
15194 case R_PPC64_GOT_TLSLD16_LO:
15195 case R_PPC64_GOT_TLSGD16_LO:
15196 case R_PPC64_GOT_TPREL16_LO_DS:
15197 case R_PPC64_GOT_DTPREL16_LO_DS:
15198 case R_PPC64_GOT16_LO:
15199 case R_PPC64_GOT16_LO_DS:
15200 case R_PPC64_TOC16_LO:
15201 case R_PPC64_TOC16_LO_DS:
15202 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15203 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15204 {
15205 bfd_byte *p = contents + (rel->r_offset & ~3);
15206 insn = bfd_get_32 (input_bfd, p);
15207 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15208 {
15209 /* Transform addic to addi when we change reg. */
15210 insn &= ~((0x3f << 26) | (0x1f << 16));
15211 insn |= (14u << 26) | (2 << 16);
15212 }
15213 else
15214 {
15215 insn &= ~(0x1f << 16);
15216 insn |= 2 << 16;
15217 }
15218 bfd_put_32 (input_bfd, insn, p);
15219 }
15220 break;
15221
15222 case R_PPC64_TPREL16_HA:
15223 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15224 {
15225 bfd_byte *p = contents + (rel->r_offset & ~3);
15226 insn = bfd_get_32 (input_bfd, p);
15227 if ((insn & ((0x3f << 26) | 0x1f << 16))
15228 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15229 /* xgettext:c-format */
15230 info->callbacks->minfo
15231 (_("%H: warning: %s unexpected insn %#x.\n"),
15232 input_bfd, input_section, rel->r_offset, howto->name, insn);
15233 else
15234 bfd_put_32 (input_bfd, NOP, p);
15235 }
15236 break;
15237
15238 case R_PPC64_TPREL16_LO:
15239 case R_PPC64_TPREL16_LO_DS:
15240 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15241 {
15242 bfd_byte *p = contents + (rel->r_offset & ~3);
15243 insn = bfd_get_32 (input_bfd, p);
15244 insn &= ~(0x1f << 16);
15245 insn |= 13 << 16;
15246 bfd_put_32 (input_bfd, insn, p);
15247 }
15248 break;
15249 }
15250
15251 /* Do any further special processing. */
15252 switch (r_type)
15253 {
15254 default:
15255 break;
15256
15257 case R_PPC64_REL16_HA:
15258 case R_PPC64_REL16DX_HA:
15259 case R_PPC64_ADDR16_HA:
15260 case R_PPC64_ADDR16_HIGHA:
15261 case R_PPC64_ADDR16_HIGHERA:
15262 case R_PPC64_ADDR16_HIGHESTA:
15263 case R_PPC64_TOC16_HA:
15264 case R_PPC64_SECTOFF_HA:
15265 case R_PPC64_TPREL16_HA:
15266 case R_PPC64_TPREL16_HIGHA:
15267 case R_PPC64_TPREL16_HIGHERA:
15268 case R_PPC64_TPREL16_HIGHESTA:
15269 case R_PPC64_DTPREL16_HA:
15270 case R_PPC64_DTPREL16_HIGHA:
15271 case R_PPC64_DTPREL16_HIGHERA:
15272 case R_PPC64_DTPREL16_HIGHESTA:
15273 /* It's just possible that this symbol is a weak symbol
15274 that's not actually defined anywhere. In that case,
15275 'sec' would be NULL, and we should leave the symbol
15276 alone (it will be set to zero elsewhere in the link). */
15277 if (sec == NULL)
15278 break;
15279 /* Fall through. */
15280
15281 case R_PPC64_GOT16_HA:
15282 case R_PPC64_PLTGOT16_HA:
15283 case R_PPC64_PLT16_HA:
15284 case R_PPC64_GOT_TLSGD16_HA:
15285 case R_PPC64_GOT_TLSLD16_HA:
15286 case R_PPC64_GOT_TPREL16_HA:
15287 case R_PPC64_GOT_DTPREL16_HA:
15288 /* Add 0x10000 if sign bit in 0:15 is set.
15289 Bits 0:15 are not used. */
15290 addend += 0x8000;
15291 break;
15292
15293 case R_PPC64_ADDR16_DS:
15294 case R_PPC64_ADDR16_LO_DS:
15295 case R_PPC64_GOT16_DS:
15296 case R_PPC64_GOT16_LO_DS:
15297 case R_PPC64_PLT16_LO_DS:
15298 case R_PPC64_SECTOFF_DS:
15299 case R_PPC64_SECTOFF_LO_DS:
15300 case R_PPC64_TOC16_DS:
15301 case R_PPC64_TOC16_LO_DS:
15302 case R_PPC64_PLTGOT16_DS:
15303 case R_PPC64_PLTGOT16_LO_DS:
15304 case R_PPC64_GOT_TPREL16_DS:
15305 case R_PPC64_GOT_TPREL16_LO_DS:
15306 case R_PPC64_GOT_DTPREL16_DS:
15307 case R_PPC64_GOT_DTPREL16_LO_DS:
15308 case R_PPC64_TPREL16_DS:
15309 case R_PPC64_TPREL16_LO_DS:
15310 case R_PPC64_DTPREL16_DS:
15311 case R_PPC64_DTPREL16_LO_DS:
15312 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15313 mask = 3;
15314 /* If this reloc is against an lq, lxv, or stxv insn, then
15315 the value must be a multiple of 16. This is somewhat of
15316 a hack, but the "correct" way to do this by defining _DQ
15317 forms of all the _DS relocs bloats all reloc switches in
15318 this file. It doesn't make much sense to use these
15319 relocs in data, so testing the insn should be safe. */
15320 if ((insn & (0x3f << 26)) == (56u << 26)
15321 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15322 mask = 15;
15323 relocation += addend;
15324 addend = insn & (mask ^ 3);
15325 if ((relocation & mask) != 0)
15326 {
15327 relocation ^= relocation & mask;
15328 info->callbacks->einfo
15329 /* xgettext:c-format */
15330 (_("%H: error: %s not a multiple of %u\n"),
15331 input_bfd, input_section, rel->r_offset,
15332 howto->name,
15333 mask + 1);
15334 bfd_set_error (bfd_error_bad_value);
15335 ret = FALSE;
15336 goto copy_reloc;
15337 }
15338 break;
15339 }
15340
15341 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15342 because such sections are not SEC_ALLOC and thus ld.so will
15343 not process them. */
15344 if (unresolved_reloc
15345 && !((input_section->flags & SEC_DEBUGGING) != 0
15346 && h->elf.def_dynamic)
15347 && _bfd_elf_section_offset (output_bfd, info, input_section,
15348 rel->r_offset) != (bfd_vma) -1)
15349 {
15350 info->callbacks->einfo
15351 /* xgettext:c-format */
15352 (_("%H: unresolvable %s against `%T'\n"),
15353 input_bfd, input_section, rel->r_offset,
15354 howto->name,
15355 h->elf.root.root.string);
15356 ret = FALSE;
15357 }
15358
15359 /* 16-bit fields in insns mostly have signed values, but a
15360 few insns have 16-bit unsigned values. Really, we should
15361 have different reloc types. */
15362 if (howto->complain_on_overflow != complain_overflow_dont
15363 && howto->dst_mask == 0xffff
15364 && (input_section->flags & SEC_CODE) != 0)
15365 {
15366 enum complain_overflow complain = complain_overflow_signed;
15367
15368 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15369 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15370 complain = complain_overflow_bitfield;
15371 else if (howto->rightshift == 0
15372 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15373 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15374 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15375 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15376 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15377 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15378 complain = complain_overflow_unsigned;
15379 if (howto->complain_on_overflow != complain)
15380 {
15381 alt_howto = *howto;
15382 alt_howto.complain_on_overflow = complain;
15383 howto = &alt_howto;
15384 }
15385 }
15386
15387 if (r_type == R_PPC64_REL16DX_HA)
15388 {
15389 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15390 if (rel->r_offset + 4 > input_section->size)
15391 r = bfd_reloc_outofrange;
15392 else
15393 {
15394 relocation += addend;
15395 relocation -= (rel->r_offset
15396 + input_section->output_offset
15397 + input_section->output_section->vma);
15398 relocation = (bfd_signed_vma) relocation >> 16;
15399 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15400 insn &= ~0x1fffc1;
15401 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15402 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15403 r = bfd_reloc_ok;
15404 if (relocation + 0x8000 > 0xffff)
15405 r = bfd_reloc_overflow;
15406 }
15407 }
15408 else
15409 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15410 rel->r_offset, relocation, addend);
15411
15412 if (r != bfd_reloc_ok)
15413 {
15414 char *more_info = NULL;
15415 const char *reloc_name = howto->name;
15416
15417 if (reloc_dest != DEST_NORMAL)
15418 {
15419 more_info = bfd_malloc (strlen (reloc_name) + 8);
15420 if (more_info != NULL)
15421 {
15422 strcpy (more_info, reloc_name);
15423 strcat (more_info, (reloc_dest == DEST_OPD
15424 ? " (OPD)" : " (stub)"));
15425 reloc_name = more_info;
15426 }
15427 }
15428
15429 if (r == bfd_reloc_overflow)
15430 {
15431 /* On code like "if (foo) foo();" don't report overflow
15432 on a branch to zero when foo is undefined. */
15433 if (!warned
15434 && (reloc_dest == DEST_STUB
15435 || !(h != NULL
15436 && (h->elf.root.type == bfd_link_hash_undefweak
15437 || h->elf.root.type == bfd_link_hash_undefined)
15438 && is_branch_reloc (r_type))))
15439 info->callbacks->reloc_overflow (info, &h->elf.root,
15440 sym_name, reloc_name,
15441 orig_rel.r_addend,
15442 input_bfd, input_section,
15443 rel->r_offset);
15444 }
15445 else
15446 {
15447 info->callbacks->einfo
15448 /* xgettext:c-format */
15449 (_("%H: %s against `%T': error %d\n"),
15450 input_bfd, input_section, rel->r_offset,
15451 reloc_name, sym_name, (int) r);
15452 ret = FALSE;
15453 }
15454 if (more_info != NULL)
15455 free (more_info);
15456 }
15457 copy_reloc:
15458 if (wrel != rel)
15459 *wrel = *rel;
15460 }
15461
15462 if (wrel != rel)
15463 {
15464 Elf_Internal_Shdr *rel_hdr;
15465 size_t deleted = rel - wrel;
15466
15467 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15468 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15469 if (rel_hdr->sh_size == 0)
15470 {
15471 /* It is too late to remove an empty reloc section. Leave
15472 one NONE reloc.
15473 ??? What is wrong with an empty section??? */
15474 rel_hdr->sh_size = rel_hdr->sh_entsize;
15475 deleted -= 1;
15476 }
15477 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15478 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15479 input_section->reloc_count -= deleted;
15480 }
15481
15482 /* If we're emitting relocations, then shortly after this function
15483 returns, reloc offsets and addends for this section will be
15484 adjusted. Worse, reloc symbol indices will be for the output
15485 file rather than the input. Save a copy of the relocs for
15486 opd_entry_value. */
15487 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15488 {
15489 bfd_size_type amt;
15490 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15491 rel = bfd_alloc (input_bfd, amt);
15492 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15493 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15494 if (rel == NULL)
15495 return FALSE;
15496 memcpy (rel, relocs, amt);
15497 }
15498 return ret;
15499 }
15500
15501 /* Adjust the value of any local symbols in opd sections. */
15502
15503 static int
15504 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15505 const char *name ATTRIBUTE_UNUSED,
15506 Elf_Internal_Sym *elfsym,
15507 asection *input_sec,
15508 struct elf_link_hash_entry *h)
15509 {
15510 struct _opd_sec_data *opd;
15511 long adjust;
15512 bfd_vma value;
15513
15514 if (h != NULL)
15515 return 1;
15516
15517 opd = get_opd_info (input_sec);
15518 if (opd == NULL || opd->adjust == NULL)
15519 return 1;
15520
15521 value = elfsym->st_value - input_sec->output_offset;
15522 if (!bfd_link_relocatable (info))
15523 value -= input_sec->output_section->vma;
15524
15525 adjust = opd->adjust[OPD_NDX (value)];
15526 if (adjust == -1)
15527 return 2;
15528
15529 elfsym->st_value += adjust;
15530 return 1;
15531 }
15532
15533 /* Finish up dynamic symbol handling. We set the contents of various
15534 dynamic sections here. */
15535
15536 static bfd_boolean
15537 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15538 struct bfd_link_info *info,
15539 struct elf_link_hash_entry *h,
15540 Elf_Internal_Sym *sym)
15541 {
15542 struct ppc_link_hash_table *htab;
15543 struct plt_entry *ent;
15544 Elf_Internal_Rela rela;
15545 bfd_byte *loc;
15546
15547 htab = ppc_hash_table (info);
15548 if (htab == NULL)
15549 return FALSE;
15550
15551 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15552 if (ent->plt.offset != (bfd_vma) -1)
15553 {
15554 /* This symbol has an entry in the procedure linkage
15555 table. Set it up. */
15556 if (!htab->elf.dynamic_sections_created
15557 || h->dynindx == -1)
15558 {
15559 BFD_ASSERT (h->type == STT_GNU_IFUNC
15560 && h->def_regular
15561 && (h->root.type == bfd_link_hash_defined
15562 || h->root.type == bfd_link_hash_defweak));
15563 rela.r_offset = (htab->elf.iplt->output_section->vma
15564 + htab->elf.iplt->output_offset
15565 + ent->plt.offset);
15566 if (htab->opd_abi)
15567 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15568 else
15569 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15570 rela.r_addend = (h->root.u.def.value
15571 + h->root.u.def.section->output_offset
15572 + h->root.u.def.section->output_section->vma
15573 + ent->addend);
15574 loc = (htab->elf.irelplt->contents
15575 + (htab->elf.irelplt->reloc_count++
15576 * sizeof (Elf64_External_Rela)));
15577 htab->local_ifunc_resolver = 1;
15578 }
15579 else
15580 {
15581 rela.r_offset = (htab->elf.splt->output_section->vma
15582 + htab->elf.splt->output_offset
15583 + ent->plt.offset);
15584 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15585 rela.r_addend = ent->addend;
15586 loc = (htab->elf.srelplt->contents
15587 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15588 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15589 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15590 htab->maybe_local_ifunc_resolver = 1;
15591 }
15592 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15593
15594 if (!htab->opd_abi)
15595 {
15596 if (!h->def_regular)
15597 {
15598 /* Mark the symbol as undefined, rather than as
15599 defined in glink. Leave the value if there were
15600 any relocations where pointer equality matters
15601 (this is a clue for the dynamic linker, to make
15602 function pointer comparisons work between an
15603 application and shared library), otherwise set it
15604 to zero. */
15605 sym->st_shndx = SHN_UNDEF;
15606 if (!h->pointer_equality_needed)
15607 sym->st_value = 0;
15608 else if (!h->ref_regular_nonweak)
15609 {
15610 /* This breaks function pointer comparisons, but
15611 that is better than breaking tests for a NULL
15612 function pointer. */
15613 sym->st_value = 0;
15614 }
15615 }
15616 }
15617 }
15618
15619 if (h->needs_copy)
15620 {
15621 /* This symbol needs a copy reloc. Set it up. */
15622 asection *srel;
15623
15624 if (h->dynindx == -1
15625 || (h->root.type != bfd_link_hash_defined
15626 && h->root.type != bfd_link_hash_defweak)
15627 || htab->elf.srelbss == NULL
15628 || htab->elf.sreldynrelro == NULL)
15629 abort ();
15630
15631 rela.r_offset = (h->root.u.def.value
15632 + h->root.u.def.section->output_section->vma
15633 + h->root.u.def.section->output_offset);
15634 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15635 rela.r_addend = 0;
15636 if (h->root.u.def.section == htab->elf.sdynrelro)
15637 srel = htab->elf.sreldynrelro;
15638 else
15639 srel = htab->elf.srelbss;
15640 loc = srel->contents;
15641 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15642 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15643 }
15644
15645 return TRUE;
15646 }
15647
15648 /* Used to decide how to sort relocs in an optimal manner for the
15649 dynamic linker, before writing them out. */
15650
15651 static enum elf_reloc_type_class
15652 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15653 const asection *rel_sec,
15654 const Elf_Internal_Rela *rela)
15655 {
15656 enum elf_ppc64_reloc_type r_type;
15657 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15658
15659 if (rel_sec == htab->elf.irelplt)
15660 return reloc_class_ifunc;
15661
15662 r_type = ELF64_R_TYPE (rela->r_info);
15663 switch (r_type)
15664 {
15665 case R_PPC64_RELATIVE:
15666 return reloc_class_relative;
15667 case R_PPC64_JMP_SLOT:
15668 return reloc_class_plt;
15669 case R_PPC64_COPY:
15670 return reloc_class_copy;
15671 default:
15672 return reloc_class_normal;
15673 }
15674 }
15675
15676 /* Finish up the dynamic sections. */
15677
15678 static bfd_boolean
15679 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15680 struct bfd_link_info *info)
15681 {
15682 struct ppc_link_hash_table *htab;
15683 bfd *dynobj;
15684 asection *sdyn;
15685
15686 htab = ppc_hash_table (info);
15687 if (htab == NULL)
15688 return FALSE;
15689
15690 dynobj = htab->elf.dynobj;
15691 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15692
15693 if (htab->elf.dynamic_sections_created)
15694 {
15695 Elf64_External_Dyn *dyncon, *dynconend;
15696
15697 if (sdyn == NULL || htab->elf.sgot == NULL)
15698 abort ();
15699
15700 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15701 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15702 for (; dyncon < dynconend; dyncon++)
15703 {
15704 Elf_Internal_Dyn dyn;
15705 asection *s;
15706
15707 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15708
15709 switch (dyn.d_tag)
15710 {
15711 default:
15712 continue;
15713
15714 case DT_PPC64_GLINK:
15715 s = htab->glink;
15716 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15717 /* We stupidly defined DT_PPC64_GLINK to be the start
15718 of glink rather than the first entry point, which is
15719 what ld.so needs, and now have a bigger stub to
15720 support automatic multiple TOCs. */
15721 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15722 break;
15723
15724 case DT_PPC64_OPD:
15725 s = bfd_get_section_by_name (output_bfd, ".opd");
15726 if (s == NULL)
15727 continue;
15728 dyn.d_un.d_ptr = s->vma;
15729 break;
15730
15731 case DT_PPC64_OPT:
15732 if (htab->do_multi_toc && htab->multi_toc_needed)
15733 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15734 if (htab->has_plt_localentry0)
15735 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15736 break;
15737
15738 case DT_PPC64_OPDSZ:
15739 s = bfd_get_section_by_name (output_bfd, ".opd");
15740 if (s == NULL)
15741 continue;
15742 dyn.d_un.d_val = s->size;
15743 break;
15744
15745 case DT_PLTGOT:
15746 s = htab->elf.splt;
15747 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15748 break;
15749
15750 case DT_JMPREL:
15751 s = htab->elf.srelplt;
15752 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15753 break;
15754
15755 case DT_PLTRELSZ:
15756 dyn.d_un.d_val = htab->elf.srelplt->size;
15757 break;
15758
15759 case DT_TEXTREL:
15760 if (htab->local_ifunc_resolver)
15761 info->callbacks->einfo
15762 (_("%X%P: text relocations and GNU indirect "
15763 "functions will result in a segfault at runtime\n"));
15764 else if (htab->maybe_local_ifunc_resolver)
15765 info->callbacks->einfo
15766 (_("%P: warning: text relocations and GNU indirect "
15767 "functions may result in a segfault at runtime\n"));
15768 continue;
15769 }
15770
15771 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15772 }
15773 }
15774
15775 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15776 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15777 {
15778 /* Fill in the first entry in the global offset table.
15779 We use it to hold the link-time TOCbase. */
15780 bfd_put_64 (output_bfd,
15781 elf_gp (output_bfd) + TOC_BASE_OFF,
15782 htab->elf.sgot->contents);
15783
15784 /* Set .got entry size. */
15785 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15786 }
15787
15788 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15789 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15790 {
15791 /* Set .plt entry size. */
15792 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15793 = PLT_ENTRY_SIZE (htab);
15794 }
15795
15796 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15797 brlt ourselves if emitrelocations. */
15798 if (htab->brlt != NULL
15799 && htab->brlt->reloc_count != 0
15800 && !_bfd_elf_link_output_relocs (output_bfd,
15801 htab->brlt,
15802 elf_section_data (htab->brlt)->rela.hdr,
15803 elf_section_data (htab->brlt)->relocs,
15804 NULL))
15805 return FALSE;
15806
15807 if (htab->glink != NULL
15808 && htab->glink->reloc_count != 0
15809 && !_bfd_elf_link_output_relocs (output_bfd,
15810 htab->glink,
15811 elf_section_data (htab->glink)->rela.hdr,
15812 elf_section_data (htab->glink)->relocs,
15813 NULL))
15814 return FALSE;
15815
15816 if (htab->glink_eh_frame != NULL
15817 && htab->glink_eh_frame->size != 0)
15818 {
15819 bfd_vma val;
15820 bfd_byte *p;
15821 struct map_stub *group;
15822 size_t align = 4;
15823
15824 p = htab->glink_eh_frame->contents;
15825 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15826
15827 for (group = htab->group; group != NULL; group = group->next)
15828 if (group->stub_sec != NULL)
15829 {
15830 /* Offset to stub section. */
15831 val = (group->stub_sec->output_section->vma
15832 + group->stub_sec->output_offset);
15833 val -= (htab->glink_eh_frame->output_section->vma
15834 + htab->glink_eh_frame->output_offset
15835 + (p + 8 - htab->glink_eh_frame->contents));
15836 if (val + 0x80000000 > 0xffffffff)
15837 {
15838 info->callbacks->einfo
15839 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15840 group->stub_sec->name);
15841 return FALSE;
15842 }
15843 bfd_put_32 (dynobj, val, p + 8);
15844 p += stub_eh_frame_size (group, align);
15845 }
15846 if (htab->glink != NULL && htab->glink->size != 0)
15847 {
15848 /* Offset to .glink. */
15849 val = (htab->glink->output_section->vma
15850 + htab->glink->output_offset
15851 + 8);
15852 val -= (htab->glink_eh_frame->output_section->vma
15853 + htab->glink_eh_frame->output_offset
15854 + (p + 8 - htab->glink_eh_frame->contents));
15855 if (val + 0x80000000 > 0xffffffff)
15856 {
15857 info->callbacks->einfo
15858 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15859 htab->glink->name);
15860 return FALSE;
15861 }
15862 bfd_put_32 (dynobj, val, p + 8);
15863 p += (24 + align - 1) & -align;
15864 }
15865
15866 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15867 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15868 htab->glink_eh_frame,
15869 htab->glink_eh_frame->contents))
15870 return FALSE;
15871 }
15872
15873 /* We need to handle writing out multiple GOT sections ourselves,
15874 since we didn't add them to DYNOBJ. We know dynobj is the first
15875 bfd. */
15876 while ((dynobj = dynobj->link.next) != NULL)
15877 {
15878 asection *s;
15879
15880 if (!is_ppc64_elf (dynobj))
15881 continue;
15882
15883 s = ppc64_elf_tdata (dynobj)->got;
15884 if (s != NULL
15885 && s->size != 0
15886 && s->output_section != bfd_abs_section_ptr
15887 && !bfd_set_section_contents (output_bfd, s->output_section,
15888 s->contents, s->output_offset,
15889 s->size))
15890 return FALSE;
15891 s = ppc64_elf_tdata (dynobj)->relgot;
15892 if (s != NULL
15893 && s->size != 0
15894 && s->output_section != bfd_abs_section_ptr
15895 && !bfd_set_section_contents (output_bfd, s->output_section,
15896 s->contents, s->output_offset,
15897 s->size))
15898 return FALSE;
15899 }
15900
15901 return TRUE;
15902 }
15903
15904 #include "elf64-target.h"
15905
15906 /* FreeBSD support */
15907
15908 #undef TARGET_LITTLE_SYM
15909 #undef TARGET_LITTLE_NAME
15910
15911 #undef TARGET_BIG_SYM
15912 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15913 #undef TARGET_BIG_NAME
15914 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15915
15916 #undef ELF_OSABI
15917 #define ELF_OSABI ELFOSABI_FREEBSD
15918
15919 #undef elf64_bed
15920 #define elf64_bed elf64_powerpc_fbsd_bed
15921
15922 #include "elf64-target.h"
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