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Make asection->id and asection->index unsigned
[thirdparty/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2015 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90 #define elf_backend_object_p ppc64_elf_object_p
91 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93 #define elf_backend_write_core_note ppc64_elf_write_core_note
94 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97 #define elf_backend_check_directives ppc64_elf_before_check_relocs
98 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
99 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100 #define elf_backend_check_relocs ppc64_elf_check_relocs
101 #define elf_backend_gc_keep ppc64_elf_gc_keep
102 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
107 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
130
131 /* Offsets to some stack save slots. */
132 #define STK_LR 16
133 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
134 /* This one is dodgy. ELFv2 does not have a linker word, so use the
135 CR save slot. Used only by optimised __tls_get_addr call stub,
136 relying on __tls_get_addr_opt not saving CR.. */
137 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
138
139 /* TOC base pointers offset from start of TOC. */
140 #define TOC_BASE_OFF 0x8000
141 /* TOC base alignment. */
142 #define TOC_BASE_ALIGN 256
143
144 /* Offset of tp and dtp pointers from start of TLS block. */
145 #define TP_OFFSET 0x7000
146 #define DTP_OFFSET 0x8000
147
148 /* .plt call stub instructions. The normal stub is like this, but
149 sometimes the .plt entry crosses a 64k boundary and we need to
150 insert an addi to adjust r11. */
151 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
152 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
153 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
154 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
155 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
156 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
157 #define BCTR 0x4e800420 /* bctr */
158
159 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
160 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
161 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
162
163 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
164 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
165 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
166 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
167 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
168 #define BNECTR 0x4ca20420 /* bnectr+ */
169 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
170
171 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
172 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
173 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
174
175 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
176
177 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
178 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
179 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
180
181 /* glink call stub instructions. We enter with the index in R0. */
182 #define GLINK_CALL_STUB_SIZE (16*4)
183 /* 0: */
184 /* .quad plt0-1f */
185 /* __glink: */
186 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
187 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
188 /* 1: */
189 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
190 /* ld %2,(0b-1b)(%11) */
191 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
192 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
193 /* ld %12,0(%11) */
194 /* ld %2,8(%11) */
195 /* mtctr %12 */
196 /* ld %11,16(%11) */
197 /* bctr */
198 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
199 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
200 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
201 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
202 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
203
204 /* Pad with this. */
205 #define NOP 0x60000000
206
207 /* Some other nops. */
208 #define CROR_151515 0x4def7b82
209 #define CROR_313131 0x4ffffb82
210
211 /* .glink entries for the first 32k functions are two instructions. */
212 #define LI_R0_0 0x38000000 /* li %r0,0 */
213 #define B_DOT 0x48000000 /* b . */
214
215 /* After that, we need two instructions to load the index, followed by
216 a branch. */
217 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
218 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
219
220 /* Instructions used by the save and restore reg functions. */
221 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
222 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
223 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
224 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
225 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
226 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
227 #define LI_R12_0 0x39800000 /* li %r12,0 */
228 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
229 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
230 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
231 #define BLR 0x4e800020 /* blr */
232
233 /* Since .opd is an array of descriptors and each entry will end up
234 with identical R_PPC64_RELATIVE relocs, there is really no need to
235 propagate .opd relocs; The dynamic linker should be taught to
236 relocate .opd without reloc entries. */
237 #ifndef NO_OPD_RELOCS
238 #define NO_OPD_RELOCS 0
239 #endif
240
241 static inline int
242 abiversion (bfd *abfd)
243 {
244 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
245 }
246
247 static inline void
248 set_abiversion (bfd *abfd, int ver)
249 {
250 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
251 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
252 }
253 \f
254 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
255
256 /* Relocation HOWTO's. */
257 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
258
259 static reloc_howto_type ppc64_elf_howto_raw[] = {
260 /* This reloc does nothing. */
261 HOWTO (R_PPC64_NONE, /* type */
262 0, /* rightshift */
263 3, /* size (0 = byte, 1 = short, 2 = long) */
264 0, /* bitsize */
265 FALSE, /* pc_relative */
266 0, /* bitpos */
267 complain_overflow_dont, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_PPC64_NONE", /* name */
270 FALSE, /* partial_inplace */
271 0, /* src_mask */
272 0, /* dst_mask */
273 FALSE), /* pcrel_offset */
274
275 /* A standard 32 bit relocation. */
276 HOWTO (R_PPC64_ADDR32, /* type */
277 0, /* rightshift */
278 2, /* size (0 = byte, 1 = short, 2 = long) */
279 32, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_PPC64_ADDR32", /* name */
285 FALSE, /* partial_inplace */
286 0, /* src_mask */
287 0xffffffff, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* An absolute 26 bit branch; the lower two bits must be zero.
291 FIXME: we don't check that, we just clear them. */
292 HOWTO (R_PPC64_ADDR24, /* type */
293 0, /* rightshift */
294 2, /* size (0 = byte, 1 = short, 2 = long) */
295 26, /* bitsize */
296 FALSE, /* pc_relative */
297 0, /* bitpos */
298 complain_overflow_bitfield, /* complain_on_overflow */
299 bfd_elf_generic_reloc, /* special_function */
300 "R_PPC64_ADDR24", /* name */
301 FALSE, /* partial_inplace */
302 0, /* src_mask */
303 0x03fffffc, /* dst_mask */
304 FALSE), /* pcrel_offset */
305
306 /* A standard 16 bit relocation. */
307 HOWTO (R_PPC64_ADDR16, /* type */
308 0, /* rightshift */
309 1, /* size (0 = byte, 1 = short, 2 = long) */
310 16, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_bitfield, /* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_PPC64_ADDR16", /* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0xffff, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 /* A 16 bit relocation without overflow. */
322 HOWTO (R_PPC64_ADDR16_LO, /* type */
323 0, /* rightshift */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_dont,/* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC64_ADDR16_LO", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* Bits 16-31 of an address. */
337 HOWTO (R_PPC64_ADDR16_HI, /* type */
338 16, /* rightshift */
339 1, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_signed, /* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_PPC64_ADDR16_HI", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0xffff, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
352 bits, treated as a signed number, is negative. */
353 HOWTO (R_PPC64_ADDR16_HA, /* type */
354 16, /* rightshift */
355 1, /* size (0 = byte, 1 = short, 2 = long) */
356 16, /* bitsize */
357 FALSE, /* pc_relative */
358 0, /* bitpos */
359 complain_overflow_signed, /* complain_on_overflow */
360 ppc64_elf_ha_reloc, /* special_function */
361 "R_PPC64_ADDR16_HA", /* name */
362 FALSE, /* partial_inplace */
363 0, /* src_mask */
364 0xffff, /* dst_mask */
365 FALSE), /* pcrel_offset */
366
367 /* An absolute 16 bit branch; the lower two bits must be zero.
368 FIXME: we don't check that, we just clear them. */
369 HOWTO (R_PPC64_ADDR14, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 FALSE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 ppc64_elf_branch_reloc, /* special_function */
377 "R_PPC64_ADDR14", /* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0x0000fffc, /* dst_mask */
381 FALSE), /* pcrel_offset */
382
383 /* An absolute 16 bit branch, for which bit 10 should be set to
384 indicate that the branch is expected to be taken. The lower two
385 bits must be zero. */
386 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
387 0, /* rightshift */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
389 16, /* bitsize */
390 FALSE, /* pc_relative */
391 0, /* bitpos */
392 complain_overflow_signed, /* complain_on_overflow */
393 ppc64_elf_brtaken_reloc, /* special_function */
394 "R_PPC64_ADDR14_BRTAKEN",/* name */
395 FALSE, /* partial_inplace */
396 0, /* src_mask */
397 0x0000fffc, /* dst_mask */
398 FALSE), /* pcrel_offset */
399
400 /* An absolute 16 bit branch, for which bit 10 should be set to
401 indicate that the branch is not expected to be taken. The lower
402 two bits must be zero. */
403 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_signed, /* complain_on_overflow */
410 ppc64_elf_brtaken_reloc, /* special_function */
411 "R_PPC64_ADDR14_BRNTAKEN",/* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0x0000fffc, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 /* A relative 26 bit branch; the lower two bits must be zero. */
418 HOWTO (R_PPC64_REL24, /* type */
419 0, /* rightshift */
420 2, /* size (0 = byte, 1 = short, 2 = long) */
421 26, /* bitsize */
422 TRUE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_signed, /* complain_on_overflow */
425 ppc64_elf_branch_reloc, /* special_function */
426 "R_PPC64_REL24", /* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0x03fffffc, /* dst_mask */
430 TRUE), /* pcrel_offset */
431
432 /* A relative 16 bit branch; the lower two bits must be zero. */
433 HOWTO (R_PPC64_REL14, /* type */
434 0, /* rightshift */
435 2, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 TRUE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_signed, /* complain_on_overflow */
440 ppc64_elf_branch_reloc, /* special_function */
441 "R_PPC64_REL14", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0x0000fffc, /* dst_mask */
445 TRUE), /* pcrel_offset */
446
447 /* A relative 16 bit branch. Bit 10 should be set to indicate that
448 the branch is expected to be taken. The lower two bits must be
449 zero. */
450 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
451 0, /* rightshift */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
453 16, /* bitsize */
454 TRUE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_signed, /* complain_on_overflow */
457 ppc64_elf_brtaken_reloc, /* special_function */
458 "R_PPC64_REL14_BRTAKEN", /* name */
459 FALSE, /* partial_inplace */
460 0, /* src_mask */
461 0x0000fffc, /* dst_mask */
462 TRUE), /* pcrel_offset */
463
464 /* A relative 16 bit branch. Bit 10 should be set to indicate that
465 the branch is not expected to be taken. The lower two bits must
466 be zero. */
467 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
468 0, /* rightshift */
469 2, /* size (0 = byte, 1 = short, 2 = long) */
470 16, /* bitsize */
471 TRUE, /* pc_relative */
472 0, /* bitpos */
473 complain_overflow_signed, /* complain_on_overflow */
474 ppc64_elf_brtaken_reloc, /* special_function */
475 "R_PPC64_REL14_BRNTAKEN",/* name */
476 FALSE, /* partial_inplace */
477 0, /* src_mask */
478 0x0000fffc, /* dst_mask */
479 TRUE), /* pcrel_offset */
480
481 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
482 symbol. */
483 HOWTO (R_PPC64_GOT16, /* type */
484 0, /* rightshift */
485 1, /* size (0 = byte, 1 = short, 2 = long) */
486 16, /* bitsize */
487 FALSE, /* pc_relative */
488 0, /* bitpos */
489 complain_overflow_signed, /* complain_on_overflow */
490 ppc64_elf_unhandled_reloc, /* special_function */
491 "R_PPC64_GOT16", /* name */
492 FALSE, /* partial_inplace */
493 0, /* src_mask */
494 0xffff, /* dst_mask */
495 FALSE), /* pcrel_offset */
496
497 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
498 the symbol. */
499 HOWTO (R_PPC64_GOT16_LO, /* type */
500 0, /* rightshift */
501 1, /* size (0 = byte, 1 = short, 2 = long) */
502 16, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_dont, /* complain_on_overflow */
506 ppc64_elf_unhandled_reloc, /* special_function */
507 "R_PPC64_GOT16_LO", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0xffff, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
514 the symbol. */
515 HOWTO (R_PPC64_GOT16_HI, /* type */
516 16, /* rightshift */
517 1, /* size (0 = byte, 1 = short, 2 = long) */
518 16, /* bitsize */
519 FALSE, /* pc_relative */
520 0, /* bitpos */
521 complain_overflow_signed,/* complain_on_overflow */
522 ppc64_elf_unhandled_reloc, /* special_function */
523 "R_PPC64_GOT16_HI", /* name */
524 FALSE, /* partial_inplace */
525 0, /* src_mask */
526 0xffff, /* dst_mask */
527 FALSE), /* pcrel_offset */
528
529 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
530 the symbol. */
531 HOWTO (R_PPC64_GOT16_HA, /* type */
532 16, /* rightshift */
533 1, /* size (0 = byte, 1 = short, 2 = long) */
534 16, /* bitsize */
535 FALSE, /* pc_relative */
536 0, /* bitpos */
537 complain_overflow_signed,/* complain_on_overflow */
538 ppc64_elf_unhandled_reloc, /* special_function */
539 "R_PPC64_GOT16_HA", /* name */
540 FALSE, /* partial_inplace */
541 0, /* src_mask */
542 0xffff, /* dst_mask */
543 FALSE), /* pcrel_offset */
544
545 /* This is used only by the dynamic linker. The symbol should exist
546 both in the object being run and in some shared library. The
547 dynamic linker copies the data addressed by the symbol from the
548 shared library into the object, because the object being
549 run has to have the data at some particular address. */
550 HOWTO (R_PPC64_COPY, /* type */
551 0, /* rightshift */
552 0, /* this one is variable size */
553 0, /* bitsize */
554 FALSE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_dont, /* complain_on_overflow */
557 ppc64_elf_unhandled_reloc, /* special_function */
558 "R_PPC64_COPY", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 0, /* dst_mask */
562 FALSE), /* pcrel_offset */
563
564 /* Like R_PPC64_ADDR64, but used when setting global offset table
565 entries. */
566 HOWTO (R_PPC64_GLOB_DAT, /* type */
567 0, /* rightshift */
568 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
569 64, /* bitsize */
570 FALSE, /* pc_relative */
571 0, /* bitpos */
572 complain_overflow_dont, /* complain_on_overflow */
573 ppc64_elf_unhandled_reloc, /* special_function */
574 "R_PPC64_GLOB_DAT", /* name */
575 FALSE, /* partial_inplace */
576 0, /* src_mask */
577 ONES (64), /* dst_mask */
578 FALSE), /* pcrel_offset */
579
580 /* Created by the link editor. Marks a procedure linkage table
581 entry for a symbol. */
582 HOWTO (R_PPC64_JMP_SLOT, /* type */
583 0, /* rightshift */
584 0, /* size (0 = byte, 1 = short, 2 = long) */
585 0, /* bitsize */
586 FALSE, /* pc_relative */
587 0, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 ppc64_elf_unhandled_reloc, /* special_function */
590 "R_PPC64_JMP_SLOT", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 /* Used only by the dynamic linker. When the object is run, this
597 doubleword64 is set to the load address of the object, plus the
598 addend. */
599 HOWTO (R_PPC64_RELATIVE, /* type */
600 0, /* rightshift */
601 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
602 64, /* bitsize */
603 FALSE, /* pc_relative */
604 0, /* bitpos */
605 complain_overflow_dont, /* complain_on_overflow */
606 bfd_elf_generic_reloc, /* special_function */
607 "R_PPC64_RELATIVE", /* name */
608 FALSE, /* partial_inplace */
609 0, /* src_mask */
610 ONES (64), /* dst_mask */
611 FALSE), /* pcrel_offset */
612
613 /* Like R_PPC64_ADDR32, but may be unaligned. */
614 HOWTO (R_PPC64_UADDR32, /* type */
615 0, /* rightshift */
616 2, /* size (0 = byte, 1 = short, 2 = long) */
617 32, /* bitsize */
618 FALSE, /* pc_relative */
619 0, /* bitpos */
620 complain_overflow_bitfield, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 "R_PPC64_UADDR32", /* name */
623 FALSE, /* partial_inplace */
624 0, /* src_mask */
625 0xffffffff, /* dst_mask */
626 FALSE), /* pcrel_offset */
627
628 /* Like R_PPC64_ADDR16, but may be unaligned. */
629 HOWTO (R_PPC64_UADDR16, /* type */
630 0, /* rightshift */
631 1, /* size (0 = byte, 1 = short, 2 = long) */
632 16, /* bitsize */
633 FALSE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_bitfield, /* complain_on_overflow */
636 bfd_elf_generic_reloc, /* special_function */
637 "R_PPC64_UADDR16", /* name */
638 FALSE, /* partial_inplace */
639 0, /* src_mask */
640 0xffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
642
643 /* 32-bit PC relative. */
644 HOWTO (R_PPC64_REL32, /* type */
645 0, /* rightshift */
646 2, /* size (0 = byte, 1 = short, 2 = long) */
647 32, /* bitsize */
648 TRUE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_signed, /* complain_on_overflow */
651 bfd_elf_generic_reloc, /* special_function */
652 "R_PPC64_REL32", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffffffff, /* dst_mask */
656 TRUE), /* pcrel_offset */
657
658 /* 32-bit relocation to the symbol's procedure linkage table. */
659 HOWTO (R_PPC64_PLT32, /* type */
660 0, /* rightshift */
661 2, /* size (0 = byte, 1 = short, 2 = long) */
662 32, /* bitsize */
663 FALSE, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_bitfield, /* complain_on_overflow */
666 ppc64_elf_unhandled_reloc, /* special_function */
667 "R_PPC64_PLT32", /* name */
668 FALSE, /* partial_inplace */
669 0, /* src_mask */
670 0xffffffff, /* dst_mask */
671 FALSE), /* pcrel_offset */
672
673 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
674 FIXME: R_PPC64_PLTREL32 not supported. */
675 HOWTO (R_PPC64_PLTREL32, /* type */
676 0, /* rightshift */
677 2, /* size (0 = byte, 1 = short, 2 = long) */
678 32, /* bitsize */
679 TRUE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_signed, /* complain_on_overflow */
682 bfd_elf_generic_reloc, /* special_function */
683 "R_PPC64_PLTREL32", /* name */
684 FALSE, /* partial_inplace */
685 0, /* src_mask */
686 0xffffffff, /* dst_mask */
687 TRUE), /* pcrel_offset */
688
689 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
690 the symbol. */
691 HOWTO (R_PPC64_PLT16_LO, /* type */
692 0, /* rightshift */
693 1, /* size (0 = byte, 1 = short, 2 = long) */
694 16, /* bitsize */
695 FALSE, /* pc_relative */
696 0, /* bitpos */
697 complain_overflow_dont, /* complain_on_overflow */
698 ppc64_elf_unhandled_reloc, /* special_function */
699 "R_PPC64_PLT16_LO", /* name */
700 FALSE, /* partial_inplace */
701 0, /* src_mask */
702 0xffff, /* dst_mask */
703 FALSE), /* pcrel_offset */
704
705 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
706 the symbol. */
707 HOWTO (R_PPC64_PLT16_HI, /* type */
708 16, /* rightshift */
709 1, /* size (0 = byte, 1 = short, 2 = long) */
710 16, /* bitsize */
711 FALSE, /* pc_relative */
712 0, /* bitpos */
713 complain_overflow_signed, /* complain_on_overflow */
714 ppc64_elf_unhandled_reloc, /* special_function */
715 "R_PPC64_PLT16_HI", /* name */
716 FALSE, /* partial_inplace */
717 0, /* src_mask */
718 0xffff, /* dst_mask */
719 FALSE), /* pcrel_offset */
720
721 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
722 the symbol. */
723 HOWTO (R_PPC64_PLT16_HA, /* type */
724 16, /* rightshift */
725 1, /* size (0 = byte, 1 = short, 2 = long) */
726 16, /* bitsize */
727 FALSE, /* pc_relative */
728 0, /* bitpos */
729 complain_overflow_signed, /* complain_on_overflow */
730 ppc64_elf_unhandled_reloc, /* special_function */
731 "R_PPC64_PLT16_HA", /* name */
732 FALSE, /* partial_inplace */
733 0, /* src_mask */
734 0xffff, /* dst_mask */
735 FALSE), /* pcrel_offset */
736
737 /* 16-bit section relative relocation. */
738 HOWTO (R_PPC64_SECTOFF, /* type */
739 0, /* rightshift */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
741 16, /* bitsize */
742 FALSE, /* pc_relative */
743 0, /* bitpos */
744 complain_overflow_signed, /* complain_on_overflow */
745 ppc64_elf_sectoff_reloc, /* special_function */
746 "R_PPC64_SECTOFF", /* name */
747 FALSE, /* partial_inplace */
748 0, /* src_mask */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
751
752 /* Like R_PPC64_SECTOFF, but no overflow warning. */
753 HOWTO (R_PPC64_SECTOFF_LO, /* type */
754 0, /* rightshift */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
756 16, /* bitsize */
757 FALSE, /* pc_relative */
758 0, /* bitpos */
759 complain_overflow_dont, /* complain_on_overflow */
760 ppc64_elf_sectoff_reloc, /* special_function */
761 "R_PPC64_SECTOFF_LO", /* name */
762 FALSE, /* partial_inplace */
763 0, /* src_mask */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
766
767 /* 16-bit upper half section relative relocation. */
768 HOWTO (R_PPC64_SECTOFF_HI, /* type */
769 16, /* rightshift */
770 1, /* size (0 = byte, 1 = short, 2 = long) */
771 16, /* bitsize */
772 FALSE, /* pc_relative */
773 0, /* bitpos */
774 complain_overflow_signed, /* complain_on_overflow */
775 ppc64_elf_sectoff_reloc, /* special_function */
776 "R_PPC64_SECTOFF_HI", /* name */
777 FALSE, /* partial_inplace */
778 0, /* src_mask */
779 0xffff, /* dst_mask */
780 FALSE), /* pcrel_offset */
781
782 /* 16-bit upper half adjusted section relative relocation. */
783 HOWTO (R_PPC64_SECTOFF_HA, /* type */
784 16, /* rightshift */
785 1, /* size (0 = byte, 1 = short, 2 = long) */
786 16, /* bitsize */
787 FALSE, /* pc_relative */
788 0, /* bitpos */
789 complain_overflow_signed, /* complain_on_overflow */
790 ppc64_elf_sectoff_ha_reloc, /* special_function */
791 "R_PPC64_SECTOFF_HA", /* name */
792 FALSE, /* partial_inplace */
793 0, /* src_mask */
794 0xffff, /* dst_mask */
795 FALSE), /* pcrel_offset */
796
797 /* Like R_PPC64_REL24 without touching the two least significant bits. */
798 HOWTO (R_PPC64_REL30, /* type */
799 2, /* rightshift */
800 2, /* size (0 = byte, 1 = short, 2 = long) */
801 30, /* bitsize */
802 TRUE, /* pc_relative */
803 0, /* bitpos */
804 complain_overflow_dont, /* complain_on_overflow */
805 bfd_elf_generic_reloc, /* special_function */
806 "R_PPC64_REL30", /* name */
807 FALSE, /* partial_inplace */
808 0, /* src_mask */
809 0xfffffffc, /* dst_mask */
810 TRUE), /* pcrel_offset */
811
812 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
813
814 /* A standard 64-bit relocation. */
815 HOWTO (R_PPC64_ADDR64, /* type */
816 0, /* rightshift */
817 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
818 64, /* bitsize */
819 FALSE, /* pc_relative */
820 0, /* bitpos */
821 complain_overflow_dont, /* complain_on_overflow */
822 bfd_elf_generic_reloc, /* special_function */
823 "R_PPC64_ADDR64", /* name */
824 FALSE, /* partial_inplace */
825 0, /* src_mask */
826 ONES (64), /* dst_mask */
827 FALSE), /* pcrel_offset */
828
829 /* The bits 32-47 of an address. */
830 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
831 32, /* rightshift */
832 1, /* size (0 = byte, 1 = short, 2 = long) */
833 16, /* bitsize */
834 FALSE, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_dont, /* complain_on_overflow */
837 bfd_elf_generic_reloc, /* special_function */
838 "R_PPC64_ADDR16_HIGHER", /* name */
839 FALSE, /* partial_inplace */
840 0, /* src_mask */
841 0xffff, /* dst_mask */
842 FALSE), /* pcrel_offset */
843
844 /* The bits 32-47 of an address, plus 1 if the contents of the low
845 16 bits, treated as a signed number, is negative. */
846 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
847 32, /* rightshift */
848 1, /* size (0 = byte, 1 = short, 2 = long) */
849 16, /* bitsize */
850 FALSE, /* pc_relative */
851 0, /* bitpos */
852 complain_overflow_dont, /* complain_on_overflow */
853 ppc64_elf_ha_reloc, /* special_function */
854 "R_PPC64_ADDR16_HIGHERA", /* name */
855 FALSE, /* partial_inplace */
856 0, /* src_mask */
857 0xffff, /* dst_mask */
858 FALSE), /* pcrel_offset */
859
860 /* The bits 48-63 of an address. */
861 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
862 48, /* rightshift */
863 1, /* size (0 = byte, 1 = short, 2 = long) */
864 16, /* bitsize */
865 FALSE, /* pc_relative */
866 0, /* bitpos */
867 complain_overflow_dont, /* complain_on_overflow */
868 bfd_elf_generic_reloc, /* special_function */
869 "R_PPC64_ADDR16_HIGHEST", /* name */
870 FALSE, /* partial_inplace */
871 0, /* src_mask */
872 0xffff, /* dst_mask */
873 FALSE), /* pcrel_offset */
874
875 /* The bits 48-63 of an address, plus 1 if the contents of the low
876 16 bits, treated as a signed number, is negative. */
877 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
878 48, /* rightshift */
879 1, /* size (0 = byte, 1 = short, 2 = long) */
880 16, /* bitsize */
881 FALSE, /* pc_relative */
882 0, /* bitpos */
883 complain_overflow_dont, /* complain_on_overflow */
884 ppc64_elf_ha_reloc, /* special_function */
885 "R_PPC64_ADDR16_HIGHESTA", /* name */
886 FALSE, /* partial_inplace */
887 0, /* src_mask */
888 0xffff, /* dst_mask */
889 FALSE), /* pcrel_offset */
890
891 /* Like ADDR64, but may be unaligned. */
892 HOWTO (R_PPC64_UADDR64, /* type */
893 0, /* rightshift */
894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
895 64, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 bfd_elf_generic_reloc, /* special_function */
900 "R_PPC64_UADDR64", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 ONES (64), /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 /* 64-bit relative relocation. */
907 HOWTO (R_PPC64_REL64, /* type */
908 0, /* rightshift */
909 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
910 64, /* bitsize */
911 TRUE, /* pc_relative */
912 0, /* bitpos */
913 complain_overflow_dont, /* complain_on_overflow */
914 bfd_elf_generic_reloc, /* special_function */
915 "R_PPC64_REL64", /* name */
916 FALSE, /* partial_inplace */
917 0, /* src_mask */
918 ONES (64), /* dst_mask */
919 TRUE), /* pcrel_offset */
920
921 /* 64-bit relocation to the symbol's procedure linkage table. */
922 HOWTO (R_PPC64_PLT64, /* type */
923 0, /* rightshift */
924 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
925 64, /* bitsize */
926 FALSE, /* pc_relative */
927 0, /* bitpos */
928 complain_overflow_dont, /* complain_on_overflow */
929 ppc64_elf_unhandled_reloc, /* special_function */
930 "R_PPC64_PLT64", /* name */
931 FALSE, /* partial_inplace */
932 0, /* src_mask */
933 ONES (64), /* dst_mask */
934 FALSE), /* pcrel_offset */
935
936 /* 64-bit PC relative relocation to the symbol's procedure linkage
937 table. */
938 /* FIXME: R_PPC64_PLTREL64 not supported. */
939 HOWTO (R_PPC64_PLTREL64, /* type */
940 0, /* rightshift */
941 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
942 64, /* bitsize */
943 TRUE, /* pc_relative */
944 0, /* bitpos */
945 complain_overflow_dont, /* complain_on_overflow */
946 ppc64_elf_unhandled_reloc, /* special_function */
947 "R_PPC64_PLTREL64", /* name */
948 FALSE, /* partial_inplace */
949 0, /* src_mask */
950 ONES (64), /* dst_mask */
951 TRUE), /* pcrel_offset */
952
953 /* 16 bit TOC-relative relocation. */
954
955 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
956 HOWTO (R_PPC64_TOC16, /* type */
957 0, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_signed, /* complain_on_overflow */
963 ppc64_elf_toc_reloc, /* special_function */
964 "R_PPC64_TOC16", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* 16 bit TOC-relative relocation without overflow. */
971
972 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
973 HOWTO (R_PPC64_TOC16_LO, /* type */
974 0, /* rightshift */
975 1, /* size (0 = byte, 1 = short, 2 = long) */
976 16, /* bitsize */
977 FALSE, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_dont, /* complain_on_overflow */
980 ppc64_elf_toc_reloc, /* special_function */
981 "R_PPC64_TOC16_LO", /* name */
982 FALSE, /* partial_inplace */
983 0, /* src_mask */
984 0xffff, /* dst_mask */
985 FALSE), /* pcrel_offset */
986
987 /* 16 bit TOC-relative relocation, high 16 bits. */
988
989 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
990 HOWTO (R_PPC64_TOC16_HI, /* type */
991 16, /* rightshift */
992 1, /* size (0 = byte, 1 = short, 2 = long) */
993 16, /* bitsize */
994 FALSE, /* pc_relative */
995 0, /* bitpos */
996 complain_overflow_signed, /* complain_on_overflow */
997 ppc64_elf_toc_reloc, /* special_function */
998 "R_PPC64_TOC16_HI", /* name */
999 FALSE, /* partial_inplace */
1000 0, /* src_mask */
1001 0xffff, /* dst_mask */
1002 FALSE), /* pcrel_offset */
1003
1004 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1005 contents of the low 16 bits, treated as a signed number, is
1006 negative. */
1007
1008 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1009 HOWTO (R_PPC64_TOC16_HA, /* type */
1010 16, /* rightshift */
1011 1, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_signed, /* complain_on_overflow */
1016 ppc64_elf_toc_ha_reloc, /* special_function */
1017 "R_PPC64_TOC16_HA", /* name */
1018 FALSE, /* partial_inplace */
1019 0, /* src_mask */
1020 0xffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1024
1025 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1026 HOWTO (R_PPC64_TOC, /* type */
1027 0, /* rightshift */
1028 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1029 64, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 ppc64_elf_toc64_reloc, /* special_function */
1034 "R_PPC64_TOC", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 ONES (64), /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_GOT16, but also informs the link editor that the
1041 value to relocate may (!) refer to a PLT entry which the link
1042 editor (a) may replace with the symbol value. If the link editor
1043 is unable to fully resolve the symbol, it may (b) create a PLT
1044 entry and store the address to the new PLT entry in the GOT.
1045 This permits lazy resolution of function symbols at run time.
1046 The link editor may also skip all of this and just (c) emit a
1047 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1048 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1049 HOWTO (R_PPC64_PLTGOT16, /* type */
1050 0, /* rightshift */
1051 1, /* size (0 = byte, 1 = short, 2 = long) */
1052 16, /* bitsize */
1053 FALSE, /* pc_relative */
1054 0, /* bitpos */
1055 complain_overflow_signed, /* complain_on_overflow */
1056 ppc64_elf_unhandled_reloc, /* special_function */
1057 "R_PPC64_PLTGOT16", /* name */
1058 FALSE, /* partial_inplace */
1059 0, /* src_mask */
1060 0xffff, /* dst_mask */
1061 FALSE), /* pcrel_offset */
1062
1063 /* Like R_PPC64_PLTGOT16, but without overflow. */
1064 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1065 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc64_elf_unhandled_reloc, /* special_function */
1073 "R_PPC64_PLTGOT16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1080 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1081 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1082 16, /* rightshift */
1083 1, /* size (0 = byte, 1 = short, 2 = long) */
1084 16, /* bitsize */
1085 FALSE, /* pc_relative */
1086 0, /* bitpos */
1087 complain_overflow_signed, /* complain_on_overflow */
1088 ppc64_elf_unhandled_reloc, /* special_function */
1089 "R_PPC64_PLTGOT16_HI", /* name */
1090 FALSE, /* partial_inplace */
1091 0, /* src_mask */
1092 0xffff, /* dst_mask */
1093 FALSE), /* pcrel_offset */
1094
1095 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1096 1 if the contents of the low 16 bits, treated as a signed number,
1097 is negative. */
1098 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1099 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1100 16, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_signed, /* complain_on_overflow */
1106 ppc64_elf_unhandled_reloc, /* special_function */
1107 "R_PPC64_PLTGOT16_HA", /* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xffff, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_ADDR16_DS, /* type */
1115 0, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 bfd_elf_generic_reloc, /* special_function */
1122 "R_PPC64_ADDR16_DS", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xfffc, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont,/* complain_on_overflow */
1136 bfd_elf_generic_reloc, /* special_function */
1137 "R_PPC64_ADDR16_LO_DS",/* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_GOT16_DS, /* type */
1145 0, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_signed, /* complain_on_overflow */
1151 ppc64_elf_unhandled_reloc, /* special_function */
1152 "R_PPC64_GOT16_DS", /* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1160 0, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_dont, /* complain_on_overflow */
1166 ppc64_elf_unhandled_reloc, /* special_function */
1167 "R_PPC64_GOT16_LO_DS", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1175 0, /* rightshift */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 16, /* bitsize */
1178 FALSE, /* pc_relative */
1179 0, /* bitpos */
1180 complain_overflow_dont, /* complain_on_overflow */
1181 ppc64_elf_unhandled_reloc, /* special_function */
1182 "R_PPC64_PLT16_LO_DS", /* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1190 0, /* rightshift */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1192 16, /* bitsize */
1193 FALSE, /* pc_relative */
1194 0, /* bitpos */
1195 complain_overflow_signed, /* complain_on_overflow */
1196 ppc64_elf_sectoff_reloc, /* special_function */
1197 "R_PPC64_SECTOFF_DS", /* name */
1198 FALSE, /* partial_inplace */
1199 0, /* src_mask */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1202
1203 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1205 0, /* rightshift */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1207 16, /* bitsize */
1208 FALSE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_dont, /* complain_on_overflow */
1211 ppc64_elf_sectoff_reloc, /* special_function */
1212 "R_PPC64_SECTOFF_LO_DS",/* name */
1213 FALSE, /* partial_inplace */
1214 0, /* src_mask */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1217
1218 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1219 HOWTO (R_PPC64_TOC16_DS, /* type */
1220 0, /* rightshift */
1221 1, /* size (0 = byte, 1 = short, 2 = long) */
1222 16, /* bitsize */
1223 FALSE, /* pc_relative */
1224 0, /* bitpos */
1225 complain_overflow_signed, /* complain_on_overflow */
1226 ppc64_elf_toc_reloc, /* special_function */
1227 "R_PPC64_TOC16_DS", /* name */
1228 FALSE, /* partial_inplace */
1229 0, /* src_mask */
1230 0xfffc, /* dst_mask */
1231 FALSE), /* pcrel_offset */
1232
1233 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1234 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1235 0, /* rightshift */
1236 1, /* size (0 = byte, 1 = short, 2 = long) */
1237 16, /* bitsize */
1238 FALSE, /* pc_relative */
1239 0, /* bitpos */
1240 complain_overflow_dont, /* complain_on_overflow */
1241 ppc64_elf_toc_reloc, /* special_function */
1242 "R_PPC64_TOC16_LO_DS", /* name */
1243 FALSE, /* partial_inplace */
1244 0, /* src_mask */
1245 0xfffc, /* dst_mask */
1246 FALSE), /* pcrel_offset */
1247
1248 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1249 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1250 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 ppc64_elf_unhandled_reloc, /* special_function */
1258 "R_PPC64_PLTGOT16_DS", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xfffc, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1265 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1266 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1267 0, /* rightshift */
1268 1, /* size (0 = byte, 1 = short, 2 = long) */
1269 16, /* bitsize */
1270 FALSE, /* pc_relative */
1271 0, /* bitpos */
1272 complain_overflow_dont, /* complain_on_overflow */
1273 ppc64_elf_unhandled_reloc, /* special_function */
1274 "R_PPC64_PLTGOT16_LO_DS",/* name */
1275 FALSE, /* partial_inplace */
1276 0, /* src_mask */
1277 0xfffc, /* dst_mask */
1278 FALSE), /* pcrel_offset */
1279
1280 /* Marker relocs for TLS. */
1281 HOWTO (R_PPC64_TLS,
1282 0, /* rightshift */
1283 2, /* size (0 = byte, 1 = short, 2 = long) */
1284 32, /* bitsize */
1285 FALSE, /* pc_relative */
1286 0, /* bitpos */
1287 complain_overflow_dont, /* complain_on_overflow */
1288 bfd_elf_generic_reloc, /* special_function */
1289 "R_PPC64_TLS", /* name */
1290 FALSE, /* partial_inplace */
1291 0, /* src_mask */
1292 0, /* dst_mask */
1293 FALSE), /* pcrel_offset */
1294
1295 HOWTO (R_PPC64_TLSGD,
1296 0, /* rightshift */
1297 2, /* size (0 = byte, 1 = short, 2 = long) */
1298 32, /* bitsize */
1299 FALSE, /* pc_relative */
1300 0, /* bitpos */
1301 complain_overflow_dont, /* complain_on_overflow */
1302 bfd_elf_generic_reloc, /* special_function */
1303 "R_PPC64_TLSGD", /* name */
1304 FALSE, /* partial_inplace */
1305 0, /* src_mask */
1306 0, /* dst_mask */
1307 FALSE), /* pcrel_offset */
1308
1309 HOWTO (R_PPC64_TLSLD,
1310 0, /* rightshift */
1311 2, /* size (0 = byte, 1 = short, 2 = long) */
1312 32, /* bitsize */
1313 FALSE, /* pc_relative */
1314 0, /* bitpos */
1315 complain_overflow_dont, /* complain_on_overflow */
1316 bfd_elf_generic_reloc, /* special_function */
1317 "R_PPC64_TLSLD", /* name */
1318 FALSE, /* partial_inplace */
1319 0, /* src_mask */
1320 0, /* dst_mask */
1321 FALSE), /* pcrel_offset */
1322
1323 HOWTO (R_PPC64_TOCSAVE,
1324 0, /* rightshift */
1325 2, /* size (0 = byte, 1 = short, 2 = long) */
1326 32, /* bitsize */
1327 FALSE, /* pc_relative */
1328 0, /* bitpos */
1329 complain_overflow_dont, /* complain_on_overflow */
1330 bfd_elf_generic_reloc, /* special_function */
1331 "R_PPC64_TOCSAVE", /* name */
1332 FALSE, /* partial_inplace */
1333 0, /* src_mask */
1334 0, /* dst_mask */
1335 FALSE), /* pcrel_offset */
1336
1337 /* Computes the load module index of the load module that contains the
1338 definition of its TLS sym. */
1339 HOWTO (R_PPC64_DTPMOD64,
1340 0, /* rightshift */
1341 4, /* size (0 = byte, 1 = short, 2 = long) */
1342 64, /* bitsize */
1343 FALSE, /* pc_relative */
1344 0, /* bitpos */
1345 complain_overflow_dont, /* complain_on_overflow */
1346 ppc64_elf_unhandled_reloc, /* special_function */
1347 "R_PPC64_DTPMOD64", /* name */
1348 FALSE, /* partial_inplace */
1349 0, /* src_mask */
1350 ONES (64), /* dst_mask */
1351 FALSE), /* pcrel_offset */
1352
1353 /* Computes a dtv-relative displacement, the difference between the value
1354 of sym+add and the base address of the thread-local storage block that
1355 contains the definition of sym, minus 0x8000. */
1356 HOWTO (R_PPC64_DTPREL64,
1357 0, /* rightshift */
1358 4, /* size (0 = byte, 1 = short, 2 = long) */
1359 64, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL64", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 ONES (64), /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* A 16 bit dtprel reloc. */
1371 HOWTO (R_PPC64_DTPREL16,
1372 0, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_signed, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Like DTPREL16, but no overflow. */
1386 HOWTO (R_PPC64_DTPREL16_LO,
1387 0, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_LO", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1401 HOWTO (R_PPC64_DTPREL16_HI,
1402 16, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_signed, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_HI", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HA,
1417 16, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_signed, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HA", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HIGHER,
1432 32, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1434 16, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HIGHER", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1447 32, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHERA", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1461 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1462 48, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 16, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_dont, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_HIGHEST", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0xffff, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1476 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1477 48, /* rightshift */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1479 16, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0xffff, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Like DTPREL16, but for insns with a DS field. */
1491 HOWTO (R_PPC64_DTPREL16_DS,
1492 0, /* rightshift */
1493 1, /* size (0 = byte, 1 = short, 2 = long) */
1494 16, /* bitsize */
1495 FALSE, /* pc_relative */
1496 0, /* bitpos */
1497 complain_overflow_signed, /* complain_on_overflow */
1498 ppc64_elf_unhandled_reloc, /* special_function */
1499 "R_PPC64_DTPREL16_DS", /* name */
1500 FALSE, /* partial_inplace */
1501 0, /* src_mask */
1502 0xfffc, /* dst_mask */
1503 FALSE), /* pcrel_offset */
1504
1505 /* Like DTPREL16_DS, but no overflow. */
1506 HOWTO (R_PPC64_DTPREL16_LO_DS,
1507 0, /* rightshift */
1508 1, /* size (0 = byte, 1 = short, 2 = long) */
1509 16, /* bitsize */
1510 FALSE, /* pc_relative */
1511 0, /* bitpos */
1512 complain_overflow_dont, /* complain_on_overflow */
1513 ppc64_elf_unhandled_reloc, /* special_function */
1514 "R_PPC64_DTPREL16_LO_DS", /* name */
1515 FALSE, /* partial_inplace */
1516 0, /* src_mask */
1517 0xfffc, /* dst_mask */
1518 FALSE), /* pcrel_offset */
1519
1520 /* Computes a tp-relative displacement, the difference between the value of
1521 sym+add and the value of the thread pointer (r13). */
1522 HOWTO (R_PPC64_TPREL64,
1523 0, /* rightshift */
1524 4, /* size (0 = byte, 1 = short, 2 = long) */
1525 64, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL64", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 ONES (64), /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* A 16 bit tprel reloc. */
1537 HOWTO (R_PPC64_TPREL16,
1538 0, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1540 16, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_signed, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* Like TPREL16, but no overflow. */
1552 HOWTO (R_PPC64_TPREL16_LO,
1553 0, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_dont, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_LO", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16_LO, but next higher group of 16 bits. */
1567 HOWTO (R_PPC64_TPREL16_HI,
1568 16, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_signed, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_HI", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_HI, but adjust for low 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HA,
1583 16, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_signed, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HA", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Like TPREL16_HI, but next higher group of 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HIGHER,
1598 32, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1600 16, /* bitsize */
1601 FALSE, /* pc_relative */
1602 0, /* bitpos */
1603 complain_overflow_dont, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HIGHER", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHERA,
1613 32, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1615 16, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHERA", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1627 HOWTO (R_PPC64_TPREL16_HIGHEST,
1628 48, /* rightshift */
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1630 16, /* bitsize */
1631 FALSE, /* pc_relative */
1632 0, /* bitpos */
1633 complain_overflow_dont, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_HIGHEST", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xffff, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1642 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1643 48, /* rightshift */
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1645 16, /* bitsize */
1646 FALSE, /* pc_relative */
1647 0, /* bitpos */
1648 complain_overflow_dont, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_HIGHESTA", /* name */
1651 FALSE, /* partial_inplace */
1652 0, /* src_mask */
1653 0xffff, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1655
1656 /* Like TPREL16, but for insns with a DS field. */
1657 HOWTO (R_PPC64_TPREL16_DS,
1658 0, /* rightshift */
1659 1, /* size (0 = byte, 1 = short, 2 = long) */
1660 16, /* bitsize */
1661 FALSE, /* pc_relative */
1662 0, /* bitpos */
1663 complain_overflow_signed, /* complain_on_overflow */
1664 ppc64_elf_unhandled_reloc, /* special_function */
1665 "R_PPC64_TPREL16_DS", /* name */
1666 FALSE, /* partial_inplace */
1667 0, /* src_mask */
1668 0xfffc, /* dst_mask */
1669 FALSE), /* pcrel_offset */
1670
1671 /* Like TPREL16_DS, but no overflow. */
1672 HOWTO (R_PPC64_TPREL16_LO_DS,
1673 0, /* rightshift */
1674 1, /* size (0 = byte, 1 = short, 2 = long) */
1675 16, /* bitsize */
1676 FALSE, /* pc_relative */
1677 0, /* bitpos */
1678 complain_overflow_dont, /* complain_on_overflow */
1679 ppc64_elf_unhandled_reloc, /* special_function */
1680 "R_PPC64_TPREL16_LO_DS", /* name */
1681 FALSE, /* partial_inplace */
1682 0, /* src_mask */
1683 0xfffc, /* dst_mask */
1684 FALSE), /* pcrel_offset */
1685
1686 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1687 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1688 to the first entry relative to the TOC base (r2). */
1689 HOWTO (R_PPC64_GOT_TLSGD16,
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 FALSE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_signed, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSGD16", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1702
1703 /* Like GOT_TLSGD16, but no overflow. */
1704 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1705 0, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 FALSE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16_LO", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1717
1718 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1719 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1720 16, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 FALSE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_signed, /* complain_on_overflow */
1726 ppc64_elf_unhandled_reloc, /* special_function */
1727 "R_PPC64_GOT_TLSGD16_HI", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 FALSE), /* pcrel_offset */
1732
1733 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1734 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1735 16, /* rightshift */
1736 1, /* size (0 = byte, 1 = short, 2 = long) */
1737 16, /* bitsize */
1738 FALSE, /* pc_relative */
1739 0, /* bitpos */
1740 complain_overflow_signed, /* complain_on_overflow */
1741 ppc64_elf_unhandled_reloc, /* special_function */
1742 "R_PPC64_GOT_TLSGD16_HA", /* name */
1743 FALSE, /* partial_inplace */
1744 0, /* src_mask */
1745 0xffff, /* dst_mask */
1746 FALSE), /* pcrel_offset */
1747
1748 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1749 with values (sym+add)@dtpmod and zero, and computes the offset to the
1750 first entry relative to the TOC base (r2). */
1751 HOWTO (R_PPC64_GOT_TLSLD16,
1752 0, /* rightshift */
1753 1, /* size (0 = byte, 1 = short, 2 = long) */
1754 16, /* bitsize */
1755 FALSE, /* pc_relative */
1756 0, /* bitpos */
1757 complain_overflow_signed, /* complain_on_overflow */
1758 ppc64_elf_unhandled_reloc, /* special_function */
1759 "R_PPC64_GOT_TLSLD16", /* name */
1760 FALSE, /* partial_inplace */
1761 0, /* src_mask */
1762 0xffff, /* dst_mask */
1763 FALSE), /* pcrel_offset */
1764
1765 /* Like GOT_TLSLD16, but no overflow. */
1766 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1767 0, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_dont, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16_LO", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779
1780 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1781 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1782 16, /* rightshift */
1783 1, /* size (0 = byte, 1 = short, 2 = long) */
1784 16, /* bitsize */
1785 FALSE, /* pc_relative */
1786 0, /* bitpos */
1787 complain_overflow_signed, /* complain_on_overflow */
1788 ppc64_elf_unhandled_reloc, /* special_function */
1789 "R_PPC64_GOT_TLSLD16_HI", /* name */
1790 FALSE, /* partial_inplace */
1791 0, /* src_mask */
1792 0xffff, /* dst_mask */
1793 FALSE), /* pcrel_offset */
1794
1795 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1796 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1797 16, /* rightshift */
1798 1, /* size (0 = byte, 1 = short, 2 = long) */
1799 16, /* bitsize */
1800 FALSE, /* pc_relative */
1801 0, /* bitpos */
1802 complain_overflow_signed, /* complain_on_overflow */
1803 ppc64_elf_unhandled_reloc, /* special_function */
1804 "R_PPC64_GOT_TLSLD16_HA", /* name */
1805 FALSE, /* partial_inplace */
1806 0, /* src_mask */
1807 0xffff, /* dst_mask */
1808 FALSE), /* pcrel_offset */
1809
1810 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1811 the offset to the entry relative to the TOC base (r2). */
1812 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1813 0, /* rightshift */
1814 1, /* size (0 = byte, 1 = short, 2 = long) */
1815 16, /* bitsize */
1816 FALSE, /* pc_relative */
1817 0, /* bitpos */
1818 complain_overflow_signed, /* complain_on_overflow */
1819 ppc64_elf_unhandled_reloc, /* special_function */
1820 "R_PPC64_GOT_DTPREL16_DS", /* name */
1821 FALSE, /* partial_inplace */
1822 0, /* src_mask */
1823 0xfffc, /* dst_mask */
1824 FALSE), /* pcrel_offset */
1825
1826 /* Like GOT_DTPREL16_DS, but no overflow. */
1827 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1828 0, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1830 16, /* bitsize */
1831 FALSE, /* pc_relative */
1832 0, /* bitpos */
1833 complain_overflow_dont, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1836 FALSE, /* partial_inplace */
1837 0, /* src_mask */
1838 0xfffc, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1840
1841 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1842 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1843 16, /* rightshift */
1844 1, /* size (0 = byte, 1 = short, 2 = long) */
1845 16, /* bitsize */
1846 FALSE, /* pc_relative */
1847 0, /* bitpos */
1848 complain_overflow_signed, /* complain_on_overflow */
1849 ppc64_elf_unhandled_reloc, /* special_function */
1850 "R_PPC64_GOT_DTPREL16_HI", /* name */
1851 FALSE, /* partial_inplace */
1852 0, /* src_mask */
1853 0xffff, /* dst_mask */
1854 FALSE), /* pcrel_offset */
1855
1856 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1857 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1858 16, /* rightshift */
1859 1, /* size (0 = byte, 1 = short, 2 = long) */
1860 16, /* bitsize */
1861 FALSE, /* pc_relative */
1862 0, /* bitpos */
1863 complain_overflow_signed, /* complain_on_overflow */
1864 ppc64_elf_unhandled_reloc, /* special_function */
1865 "R_PPC64_GOT_DTPREL16_HA", /* name */
1866 FALSE, /* partial_inplace */
1867 0, /* src_mask */
1868 0xffff, /* dst_mask */
1869 FALSE), /* pcrel_offset */
1870
1871 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1872 offset to the entry relative to the TOC base (r2). */
1873 HOWTO (R_PPC64_GOT_TPREL16_DS,
1874 0, /* rightshift */
1875 1, /* size (0 = byte, 1 = short, 2 = long) */
1876 16, /* bitsize */
1877 FALSE, /* pc_relative */
1878 0, /* bitpos */
1879 complain_overflow_signed, /* complain_on_overflow */
1880 ppc64_elf_unhandled_reloc, /* special_function */
1881 "R_PPC64_GOT_TPREL16_DS", /* name */
1882 FALSE, /* partial_inplace */
1883 0, /* src_mask */
1884 0xfffc, /* dst_mask */
1885 FALSE), /* pcrel_offset */
1886
1887 /* Like GOT_TPREL16_DS, but no overflow. */
1888 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1889 0, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1891 16, /* bitsize */
1892 FALSE, /* pc_relative */
1893 0, /* bitpos */
1894 complain_overflow_dont, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1897 FALSE, /* partial_inplace */
1898 0, /* src_mask */
1899 0xfffc, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1901
1902 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1903 HOWTO (R_PPC64_GOT_TPREL16_HI,
1904 16, /* rightshift */
1905 1, /* size (0 = byte, 1 = short, 2 = long) */
1906 16, /* bitsize */
1907 FALSE, /* pc_relative */
1908 0, /* bitpos */
1909 complain_overflow_signed, /* complain_on_overflow */
1910 ppc64_elf_unhandled_reloc, /* special_function */
1911 "R_PPC64_GOT_TPREL16_HI", /* name */
1912 FALSE, /* partial_inplace */
1913 0, /* src_mask */
1914 0xffff, /* dst_mask */
1915 FALSE), /* pcrel_offset */
1916
1917 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1918 HOWTO (R_PPC64_GOT_TPREL16_HA,
1919 16, /* rightshift */
1920 1, /* size (0 = byte, 1 = short, 2 = long) */
1921 16, /* bitsize */
1922 FALSE, /* pc_relative */
1923 0, /* bitpos */
1924 complain_overflow_signed, /* complain_on_overflow */
1925 ppc64_elf_unhandled_reloc, /* special_function */
1926 "R_PPC64_GOT_TPREL16_HA", /* name */
1927 FALSE, /* partial_inplace */
1928 0, /* src_mask */
1929 0xffff, /* dst_mask */
1930 FALSE), /* pcrel_offset */
1931
1932 HOWTO (R_PPC64_JMP_IREL, /* type */
1933 0, /* rightshift */
1934 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1935 0, /* bitsize */
1936 FALSE, /* pc_relative */
1937 0, /* bitpos */
1938 complain_overflow_dont, /* complain_on_overflow */
1939 ppc64_elf_unhandled_reloc, /* special_function */
1940 "R_PPC64_JMP_IREL", /* name */
1941 FALSE, /* partial_inplace */
1942 0, /* src_mask */
1943 0, /* dst_mask */
1944 FALSE), /* pcrel_offset */
1945
1946 HOWTO (R_PPC64_IRELATIVE, /* type */
1947 0, /* rightshift */
1948 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1949 64, /* bitsize */
1950 FALSE, /* pc_relative */
1951 0, /* bitpos */
1952 complain_overflow_dont, /* complain_on_overflow */
1953 bfd_elf_generic_reloc, /* special_function */
1954 "R_PPC64_IRELATIVE", /* name */
1955 FALSE, /* partial_inplace */
1956 0, /* src_mask */
1957 ONES (64), /* dst_mask */
1958 FALSE), /* pcrel_offset */
1959
1960 /* A 16 bit relative relocation. */
1961 HOWTO (R_PPC64_REL16, /* type */
1962 0, /* rightshift */
1963 1, /* size (0 = byte, 1 = short, 2 = long) */
1964 16, /* bitsize */
1965 TRUE, /* pc_relative */
1966 0, /* bitpos */
1967 complain_overflow_signed, /* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_REL16", /* name */
1970 FALSE, /* partial_inplace */
1971 0, /* src_mask */
1972 0xffff, /* dst_mask */
1973 TRUE), /* pcrel_offset */
1974
1975 /* A 16 bit relative relocation without overflow. */
1976 HOWTO (R_PPC64_REL16_LO, /* type */
1977 0, /* rightshift */
1978 1, /* size (0 = byte, 1 = short, 2 = long) */
1979 16, /* bitsize */
1980 TRUE, /* pc_relative */
1981 0, /* bitpos */
1982 complain_overflow_dont,/* complain_on_overflow */
1983 bfd_elf_generic_reloc, /* special_function */
1984 "R_PPC64_REL16_LO", /* name */
1985 FALSE, /* partial_inplace */
1986 0, /* src_mask */
1987 0xffff, /* dst_mask */
1988 TRUE), /* pcrel_offset */
1989
1990 /* The high order 16 bits of a relative address. */
1991 HOWTO (R_PPC64_REL16_HI, /* type */
1992 16, /* rightshift */
1993 1, /* size (0 = byte, 1 = short, 2 = long) */
1994 16, /* bitsize */
1995 TRUE, /* pc_relative */
1996 0, /* bitpos */
1997 complain_overflow_signed, /* complain_on_overflow */
1998 bfd_elf_generic_reloc, /* special_function */
1999 "R_PPC64_REL16_HI", /* name */
2000 FALSE, /* partial_inplace */
2001 0, /* src_mask */
2002 0xffff, /* dst_mask */
2003 TRUE), /* pcrel_offset */
2004
2005 /* The high order 16 bits of a relative address, plus 1 if the contents of
2006 the low 16 bits, treated as a signed number, is negative. */
2007 HOWTO (R_PPC64_REL16_HA, /* type */
2008 16, /* rightshift */
2009 1, /* size (0 = byte, 1 = short, 2 = long) */
2010 16, /* bitsize */
2011 TRUE, /* pc_relative */
2012 0, /* bitpos */
2013 complain_overflow_signed, /* complain_on_overflow */
2014 ppc64_elf_ha_reloc, /* special_function */
2015 "R_PPC64_REL16_HA", /* name */
2016 FALSE, /* partial_inplace */
2017 0, /* src_mask */
2018 0xffff, /* dst_mask */
2019 TRUE), /* pcrel_offset */
2020
2021 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2022 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2023 16, /* rightshift */
2024 1, /* size (0 = byte, 1 = short, 2 = long) */
2025 16, /* bitsize */
2026 FALSE, /* pc_relative */
2027 0, /* bitpos */
2028 complain_overflow_dont, /* complain_on_overflow */
2029 bfd_elf_generic_reloc, /* special_function */
2030 "R_PPC64_ADDR16_HIGH", /* name */
2031 FALSE, /* partial_inplace */
2032 0, /* src_mask */
2033 0xffff, /* dst_mask */
2034 FALSE), /* pcrel_offset */
2035
2036 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2037 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2038 16, /* rightshift */
2039 1, /* size (0 = byte, 1 = short, 2 = long) */
2040 16, /* bitsize */
2041 FALSE, /* pc_relative */
2042 0, /* bitpos */
2043 complain_overflow_dont, /* complain_on_overflow */
2044 ppc64_elf_ha_reloc, /* special_function */
2045 "R_PPC64_ADDR16_HIGHA", /* name */
2046 FALSE, /* partial_inplace */
2047 0, /* src_mask */
2048 0xffff, /* dst_mask */
2049 FALSE), /* pcrel_offset */
2050
2051 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2052 HOWTO (R_PPC64_DTPREL16_HIGH,
2053 16, /* rightshift */
2054 1, /* size (0 = byte, 1 = short, 2 = long) */
2055 16, /* bitsize */
2056 FALSE, /* pc_relative */
2057 0, /* bitpos */
2058 complain_overflow_dont, /* complain_on_overflow */
2059 ppc64_elf_unhandled_reloc, /* special_function */
2060 "R_PPC64_DTPREL16_HIGH", /* name */
2061 FALSE, /* partial_inplace */
2062 0, /* src_mask */
2063 0xffff, /* dst_mask */
2064 FALSE), /* pcrel_offset */
2065
2066 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2067 HOWTO (R_PPC64_DTPREL16_HIGHA,
2068 16, /* rightshift */
2069 1, /* size (0 = byte, 1 = short, 2 = long) */
2070 16, /* bitsize */
2071 FALSE, /* pc_relative */
2072 0, /* bitpos */
2073 complain_overflow_dont, /* complain_on_overflow */
2074 ppc64_elf_unhandled_reloc, /* special_function */
2075 "R_PPC64_DTPREL16_HIGHA", /* name */
2076 FALSE, /* partial_inplace */
2077 0, /* src_mask */
2078 0xffff, /* dst_mask */
2079 FALSE), /* pcrel_offset */
2080
2081 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2082 HOWTO (R_PPC64_TPREL16_HIGH,
2083 16, /* rightshift */
2084 1, /* size (0 = byte, 1 = short, 2 = long) */
2085 16, /* bitsize */
2086 FALSE, /* pc_relative */
2087 0, /* bitpos */
2088 complain_overflow_dont, /* complain_on_overflow */
2089 ppc64_elf_unhandled_reloc, /* special_function */
2090 "R_PPC64_TPREL16_HIGH", /* name */
2091 FALSE, /* partial_inplace */
2092 0, /* src_mask */
2093 0xffff, /* dst_mask */
2094 FALSE), /* pcrel_offset */
2095
2096 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2097 HOWTO (R_PPC64_TPREL16_HIGHA,
2098 16, /* rightshift */
2099 1, /* size (0 = byte, 1 = short, 2 = long) */
2100 16, /* bitsize */
2101 FALSE, /* pc_relative */
2102 0, /* bitpos */
2103 complain_overflow_dont, /* complain_on_overflow */
2104 ppc64_elf_unhandled_reloc, /* special_function */
2105 "R_PPC64_TPREL16_HIGHA", /* name */
2106 FALSE, /* partial_inplace */
2107 0, /* src_mask */
2108 0xffff, /* dst_mask */
2109 FALSE), /* pcrel_offset */
2110
2111 /* Like ADDR64, but use local entry point of function. */
2112 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2113 0, /* rightshift */
2114 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2115 64, /* bitsize */
2116 FALSE, /* pc_relative */
2117 0, /* bitpos */
2118 complain_overflow_dont, /* complain_on_overflow */
2119 bfd_elf_generic_reloc, /* special_function */
2120 "R_PPC64_ADDR64_LOCAL", /* name */
2121 FALSE, /* partial_inplace */
2122 0, /* src_mask */
2123 ONES (64), /* dst_mask */
2124 FALSE), /* pcrel_offset */
2125
2126 /* GNU extension to record C++ vtable hierarchy. */
2127 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2128 0, /* rightshift */
2129 0, /* size (0 = byte, 1 = short, 2 = long) */
2130 0, /* bitsize */
2131 FALSE, /* pc_relative */
2132 0, /* bitpos */
2133 complain_overflow_dont, /* complain_on_overflow */
2134 NULL, /* special_function */
2135 "R_PPC64_GNU_VTINHERIT", /* name */
2136 FALSE, /* partial_inplace */
2137 0, /* src_mask */
2138 0, /* dst_mask */
2139 FALSE), /* pcrel_offset */
2140
2141 /* GNU extension to record C++ vtable member usage. */
2142 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2143 0, /* rightshift */
2144 0, /* size (0 = byte, 1 = short, 2 = long) */
2145 0, /* bitsize */
2146 FALSE, /* pc_relative */
2147 0, /* bitpos */
2148 complain_overflow_dont, /* complain_on_overflow */
2149 NULL, /* special_function */
2150 "R_PPC64_GNU_VTENTRY", /* name */
2151 FALSE, /* partial_inplace */
2152 0, /* src_mask */
2153 0, /* dst_mask */
2154 FALSE), /* pcrel_offset */
2155 };
2156
2157 \f
2158 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2159 be done. */
2160
2161 static void
2162 ppc_howto_init (void)
2163 {
2164 unsigned int i, type;
2165
2166 for (i = 0;
2167 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2168 i++)
2169 {
2170 type = ppc64_elf_howto_raw[i].type;
2171 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2172 / sizeof (ppc64_elf_howto_table[0])));
2173 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2174 }
2175 }
2176
2177 static reloc_howto_type *
2178 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2179 bfd_reloc_code_real_type code)
2180 {
2181 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2182
2183 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2184 /* Initialize howto table if needed. */
2185 ppc_howto_init ();
2186
2187 switch (code)
2188 {
2189 default:
2190 return NULL;
2191
2192 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2193 break;
2194 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2195 break;
2196 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2197 break;
2198 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2199 break;
2200 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2201 break;
2202 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2203 break;
2204 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2205 break;
2206 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2207 break;
2208 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2209 break;
2210 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2211 break;
2212 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2213 break;
2214 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2215 break;
2216 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2217 break;
2218 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2219 break;
2220 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2221 break;
2222 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2223 break;
2224 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2225 break;
2226 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2227 break;
2228 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2229 break;
2230 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2231 break;
2232 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2233 break;
2234 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2235 break;
2236 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2237 break;
2238 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2239 break;
2240 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2241 break;
2242 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2243 break;
2244 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2245 break;
2246 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2247 break;
2248 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2249 break;
2250 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2251 break;
2252 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2253 break;
2254 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2255 break;
2256 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2257 break;
2258 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2259 break;
2260 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2261 break;
2262 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2263 break;
2264 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2265 break;
2266 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2267 break;
2268 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2269 break;
2270 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2271 break;
2272 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2273 break;
2274 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2275 break;
2276 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2277 break;
2278 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2279 break;
2280 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2281 break;
2282 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2283 break;
2284 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2285 break;
2286 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2287 break;
2288 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2289 break;
2290 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2291 break;
2292 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2293 break;
2294 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2295 break;
2296 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2297 break;
2298 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2299 break;
2300 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2301 break;
2302 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2303 break;
2304 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2305 break;
2306 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2307 break;
2308 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2309 break;
2310 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2311 break;
2312 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2313 break;
2314 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2315 break;
2316 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2317 break;
2318 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2319 break;
2320 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2321 break;
2322 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2323 break;
2324 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2325 break;
2326 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2327 break;
2328 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2329 break;
2330 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2331 break;
2332 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2333 break;
2334 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2335 break;
2336 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2337 break;
2338 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2339 break;
2340 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2341 break;
2342 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2343 break;
2344 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2345 break;
2346 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2347 break;
2348 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2349 break;
2350 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2351 break;
2352 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2353 break;
2354 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2355 break;
2356 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2357 break;
2358 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2359 break;
2360 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2361 break;
2362 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2363 break;
2364 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2365 break;
2366 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2367 break;
2368 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2369 break;
2370 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2371 break;
2372 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2373 break;
2374 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2375 break;
2376 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2377 break;
2378 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2379 break;
2380 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2381 break;
2382 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2383 break;
2384 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2385 break;
2386 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2387 break;
2388 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2389 break;
2390 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2391 break;
2392 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2393 break;
2394 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2395 break;
2396 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2397 break;
2398 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2399 break;
2400 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2401 break;
2402 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2403 break;
2404 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2405 break;
2406 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2407 break;
2408 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2409 break;
2410 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2411 break;
2412 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2413 break;
2414 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2415 break;
2416 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2417 break;
2418 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2419 break;
2420 }
2421
2422 return ppc64_elf_howto_table[r];
2423 };
2424
2425 static reloc_howto_type *
2426 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2427 const char *r_name)
2428 {
2429 unsigned int i;
2430
2431 for (i = 0;
2432 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2433 i++)
2434 if (ppc64_elf_howto_raw[i].name != NULL
2435 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2436 return &ppc64_elf_howto_raw[i];
2437
2438 return NULL;
2439 }
2440
2441 /* Set the howto pointer for a PowerPC ELF reloc. */
2442
2443 static void
2444 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2445 Elf_Internal_Rela *dst)
2446 {
2447 unsigned int type;
2448
2449 /* Initialize howto table if needed. */
2450 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2451 ppc_howto_init ();
2452
2453 type = ELF64_R_TYPE (dst->r_info);
2454 if (type >= (sizeof (ppc64_elf_howto_table)
2455 / sizeof (ppc64_elf_howto_table[0])))
2456 {
2457 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2458 abfd, (int) type);
2459 type = R_PPC64_NONE;
2460 }
2461 cache_ptr->howto = ppc64_elf_howto_table[type];
2462 }
2463
2464 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2465
2466 static bfd_reloc_status_type
2467 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2468 void *data, asection *input_section,
2469 bfd *output_bfd, char **error_message)
2470 {
2471 /* If this is a relocatable link (output_bfd test tells us), just
2472 call the generic function. Any adjustment will be done at final
2473 link time. */
2474 if (output_bfd != NULL)
2475 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2476 input_section, output_bfd, error_message);
2477
2478 /* Adjust the addend for sign extension of the low 16 bits.
2479 We won't actually be using the low 16 bits, so trashing them
2480 doesn't matter. */
2481 reloc_entry->addend += 0x8000;
2482 return bfd_reloc_continue;
2483 }
2484
2485 static bfd_reloc_status_type
2486 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2487 void *data, asection *input_section,
2488 bfd *output_bfd, char **error_message)
2489 {
2490 if (output_bfd != NULL)
2491 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2492 input_section, output_bfd, error_message);
2493
2494 if (strcmp (symbol->section->name, ".opd") == 0
2495 && (symbol->section->owner->flags & DYNAMIC) == 0)
2496 {
2497 bfd_vma dest = opd_entry_value (symbol->section,
2498 symbol->value + reloc_entry->addend,
2499 NULL, NULL, FALSE);
2500 if (dest != (bfd_vma) -1)
2501 reloc_entry->addend = dest - (symbol->value
2502 + symbol->section->output_section->vma
2503 + symbol->section->output_offset);
2504 }
2505 else
2506 {
2507 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2508
2509 if (symbol->section->owner != abfd
2510 && abiversion (symbol->section->owner) >= 2)
2511 {
2512 unsigned int i;
2513
2514 for (i = 0; i < symbol->section->owner->symcount; ++i)
2515 {
2516 asymbol *symdef = symbol->section->owner->outsymbols[i];
2517
2518 if (strcmp (symdef->name, symbol->name) == 0)
2519 {
2520 elfsym = (elf_symbol_type *) symdef;
2521 break;
2522 }
2523 }
2524 }
2525 reloc_entry->addend
2526 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2527 }
2528 return bfd_reloc_continue;
2529 }
2530
2531 static bfd_reloc_status_type
2532 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2533 void *data, asection *input_section,
2534 bfd *output_bfd, char **error_message)
2535 {
2536 long insn;
2537 enum elf_ppc64_reloc_type r_type;
2538 bfd_size_type octets;
2539 /* Assume 'at' branch hints. */
2540 bfd_boolean is_isa_v2 = TRUE;
2541
2542 /* If this is a relocatable link (output_bfd test tells us), just
2543 call the generic function. Any adjustment will be done at final
2544 link time. */
2545 if (output_bfd != NULL)
2546 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2547 input_section, output_bfd, error_message);
2548
2549 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2550 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2551 insn &= ~(0x01 << 21);
2552 r_type = reloc_entry->howto->type;
2553 if (r_type == R_PPC64_ADDR14_BRTAKEN
2554 || r_type == R_PPC64_REL14_BRTAKEN)
2555 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2556
2557 if (is_isa_v2)
2558 {
2559 /* Set 'a' bit. This is 0b00010 in BO field for branch
2560 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2561 for branch on CTR insns (BO == 1a00t or 1a01t). */
2562 if ((insn & (0x14 << 21)) == (0x04 << 21))
2563 insn |= 0x02 << 21;
2564 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2565 insn |= 0x08 << 21;
2566 else
2567 goto out;
2568 }
2569 else
2570 {
2571 bfd_vma target = 0;
2572 bfd_vma from;
2573
2574 if (!bfd_is_com_section (symbol->section))
2575 target = symbol->value;
2576 target += symbol->section->output_section->vma;
2577 target += symbol->section->output_offset;
2578 target += reloc_entry->addend;
2579
2580 from = (reloc_entry->address
2581 + input_section->output_offset
2582 + input_section->output_section->vma);
2583
2584 /* Invert 'y' bit if not the default. */
2585 if ((bfd_signed_vma) (target - from) < 0)
2586 insn ^= 0x01 << 21;
2587 }
2588 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2589 out:
2590 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2591 input_section, output_bfd, error_message);
2592 }
2593
2594 static bfd_reloc_status_type
2595 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2596 void *data, asection *input_section,
2597 bfd *output_bfd, char **error_message)
2598 {
2599 /* If this is a relocatable link (output_bfd test tells us), just
2600 call the generic function. Any adjustment will be done at final
2601 link time. */
2602 if (output_bfd != NULL)
2603 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2604 input_section, output_bfd, error_message);
2605
2606 /* Subtract the symbol section base address. */
2607 reloc_entry->addend -= symbol->section->output_section->vma;
2608 return bfd_reloc_continue;
2609 }
2610
2611 static bfd_reloc_status_type
2612 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2613 void *data, asection *input_section,
2614 bfd *output_bfd, char **error_message)
2615 {
2616 /* If this is a relocatable link (output_bfd test tells us), just
2617 call the generic function. Any adjustment will be done at final
2618 link time. */
2619 if (output_bfd != NULL)
2620 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2621 input_section, output_bfd, error_message);
2622
2623 /* Subtract the symbol section base address. */
2624 reloc_entry->addend -= symbol->section->output_section->vma;
2625
2626 /* Adjust the addend for sign extension of the low 16 bits. */
2627 reloc_entry->addend += 0x8000;
2628 return bfd_reloc_continue;
2629 }
2630
2631 static bfd_reloc_status_type
2632 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2633 void *data, asection *input_section,
2634 bfd *output_bfd, char **error_message)
2635 {
2636 bfd_vma TOCstart;
2637
2638 /* If this is a relocatable link (output_bfd test tells us), just
2639 call the generic function. Any adjustment will be done at final
2640 link time. */
2641 if (output_bfd != NULL)
2642 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2643 input_section, output_bfd, error_message);
2644
2645 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2646 if (TOCstart == 0)
2647 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2648
2649 /* Subtract the TOC base address. */
2650 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2651 return bfd_reloc_continue;
2652 }
2653
2654 static bfd_reloc_status_type
2655 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2656 void *data, asection *input_section,
2657 bfd *output_bfd, char **error_message)
2658 {
2659 bfd_vma TOCstart;
2660
2661 /* If this is a relocatable link (output_bfd test tells us), just
2662 call the generic function. Any adjustment will be done at final
2663 link time. */
2664 if (output_bfd != NULL)
2665 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2666 input_section, output_bfd, error_message);
2667
2668 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2669 if (TOCstart == 0)
2670 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2671
2672 /* Subtract the TOC base address. */
2673 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2674
2675 /* Adjust the addend for sign extension of the low 16 bits. */
2676 reloc_entry->addend += 0x8000;
2677 return bfd_reloc_continue;
2678 }
2679
2680 static bfd_reloc_status_type
2681 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2682 void *data, asection *input_section,
2683 bfd *output_bfd, char **error_message)
2684 {
2685 bfd_vma TOCstart;
2686 bfd_size_type octets;
2687
2688 /* If this is a relocatable link (output_bfd test tells us), just
2689 call the generic function. Any adjustment will be done at final
2690 link time. */
2691 if (output_bfd != NULL)
2692 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2693 input_section, output_bfd, error_message);
2694
2695 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2696 if (TOCstart == 0)
2697 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2698
2699 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2700 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2701 return bfd_reloc_ok;
2702 }
2703
2704 static bfd_reloc_status_type
2705 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2706 void *data, asection *input_section,
2707 bfd *output_bfd, char **error_message)
2708 {
2709 /* If this is a relocatable link (output_bfd test tells us), just
2710 call the generic function. Any adjustment will be done at final
2711 link time. */
2712 if (output_bfd != NULL)
2713 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2714 input_section, output_bfd, error_message);
2715
2716 if (error_message != NULL)
2717 {
2718 static char buf[60];
2719 sprintf (buf, "generic linker can't handle %s",
2720 reloc_entry->howto->name);
2721 *error_message = buf;
2722 }
2723 return bfd_reloc_dangerous;
2724 }
2725
2726 /* Track GOT entries needed for a given symbol. We might need more
2727 than one got entry per symbol. */
2728 struct got_entry
2729 {
2730 struct got_entry *next;
2731
2732 /* The symbol addend that we'll be placing in the GOT. */
2733 bfd_vma addend;
2734
2735 /* Unlike other ELF targets, we use separate GOT entries for the same
2736 symbol referenced from different input files. This is to support
2737 automatic multiple TOC/GOT sections, where the TOC base can vary
2738 from one input file to another. After partitioning into TOC groups
2739 we merge entries within the group.
2740
2741 Point to the BFD owning this GOT entry. */
2742 bfd *owner;
2743
2744 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2745 TLS_TPREL or TLS_DTPREL for tls entries. */
2746 unsigned char tls_type;
2747
2748 /* Non-zero if got.ent points to real entry. */
2749 unsigned char is_indirect;
2750
2751 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2752 union
2753 {
2754 bfd_signed_vma refcount;
2755 bfd_vma offset;
2756 struct got_entry *ent;
2757 } got;
2758 };
2759
2760 /* The same for PLT. */
2761 struct plt_entry
2762 {
2763 struct plt_entry *next;
2764
2765 bfd_vma addend;
2766
2767 union
2768 {
2769 bfd_signed_vma refcount;
2770 bfd_vma offset;
2771 } plt;
2772 };
2773
2774 struct ppc64_elf_obj_tdata
2775 {
2776 struct elf_obj_tdata elf;
2777
2778 /* Shortcuts to dynamic linker sections. */
2779 asection *got;
2780 asection *relgot;
2781
2782 /* Used during garbage collection. We attach global symbols defined
2783 on removed .opd entries to this section so that the sym is removed. */
2784 asection *deleted_section;
2785
2786 /* TLS local dynamic got entry handling. Support for multiple GOT
2787 sections means we potentially need one of these for each input bfd. */
2788 struct got_entry tlsld_got;
2789
2790 union {
2791 /* A copy of relocs before they are modified for --emit-relocs. */
2792 Elf_Internal_Rela *relocs;
2793
2794 /* Section contents. */
2795 bfd_byte *contents;
2796 } opd;
2797
2798 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2799 the reloc to be in the range -32768 to 32767. */
2800 unsigned int has_small_toc_reloc : 1;
2801
2802 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2803 instruction not one we handle. */
2804 unsigned int unexpected_toc_insn : 1;
2805 };
2806
2807 #define ppc64_elf_tdata(bfd) \
2808 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2809
2810 #define ppc64_tlsld_got(bfd) \
2811 (&ppc64_elf_tdata (bfd)->tlsld_got)
2812
2813 #define is_ppc64_elf(bfd) \
2814 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2815 && elf_object_id (bfd) == PPC64_ELF_DATA)
2816
2817 /* Override the generic function because we store some extras. */
2818
2819 static bfd_boolean
2820 ppc64_elf_mkobject (bfd *abfd)
2821 {
2822 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2823 PPC64_ELF_DATA);
2824 }
2825
2826 /* Fix bad default arch selected for a 64 bit input bfd when the
2827 default is 32 bit. */
2828
2829 static bfd_boolean
2830 ppc64_elf_object_p (bfd *abfd)
2831 {
2832 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2833 {
2834 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2835
2836 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2837 {
2838 /* Relies on arch after 32 bit default being 64 bit default. */
2839 abfd->arch_info = abfd->arch_info->next;
2840 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2841 }
2842 }
2843 return TRUE;
2844 }
2845
2846 /* Support for core dump NOTE sections. */
2847
2848 static bfd_boolean
2849 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2850 {
2851 size_t offset, size;
2852
2853 if (note->descsz != 504)
2854 return FALSE;
2855
2856 /* pr_cursig */
2857 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2858
2859 /* pr_pid */
2860 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2861
2862 /* pr_reg */
2863 offset = 112;
2864 size = 384;
2865
2866 /* Make a ".reg/999" section. */
2867 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2868 size, note->descpos + offset);
2869 }
2870
2871 static bfd_boolean
2872 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2873 {
2874 if (note->descsz != 136)
2875 return FALSE;
2876
2877 elf_tdata (abfd)->core->pid
2878 = bfd_get_32 (abfd, note->descdata + 24);
2879 elf_tdata (abfd)->core->program
2880 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2881 elf_tdata (abfd)->core->command
2882 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2883
2884 return TRUE;
2885 }
2886
2887 static char *
2888 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2889 ...)
2890 {
2891 switch (note_type)
2892 {
2893 default:
2894 return NULL;
2895
2896 case NT_PRPSINFO:
2897 {
2898 char data[136];
2899 va_list ap;
2900
2901 va_start (ap, note_type);
2902 memset (data, 0, sizeof (data));
2903 strncpy (data + 40, va_arg (ap, const char *), 16);
2904 strncpy (data + 56, va_arg (ap, const char *), 80);
2905 va_end (ap);
2906 return elfcore_write_note (abfd, buf, bufsiz,
2907 "CORE", note_type, data, sizeof (data));
2908 }
2909
2910 case NT_PRSTATUS:
2911 {
2912 char data[504];
2913 va_list ap;
2914 long pid;
2915 int cursig;
2916 const void *greg;
2917
2918 va_start (ap, note_type);
2919 memset (data, 0, 112);
2920 pid = va_arg (ap, long);
2921 bfd_put_32 (abfd, pid, data + 32);
2922 cursig = va_arg (ap, int);
2923 bfd_put_16 (abfd, cursig, data + 12);
2924 greg = va_arg (ap, const void *);
2925 memcpy (data + 112, greg, 384);
2926 memset (data + 496, 0, 8);
2927 va_end (ap);
2928 return elfcore_write_note (abfd, buf, bufsiz,
2929 "CORE", note_type, data, sizeof (data));
2930 }
2931 }
2932 }
2933
2934 /* Add extra PPC sections. */
2935
2936 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2937 {
2938 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2939 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2940 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2941 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2942 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2943 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2944 { NULL, 0, 0, 0, 0 }
2945 };
2946
2947 enum _ppc64_sec_type {
2948 sec_normal = 0,
2949 sec_opd = 1,
2950 sec_toc = 2
2951 };
2952
2953 struct _ppc64_elf_section_data
2954 {
2955 struct bfd_elf_section_data elf;
2956
2957 union
2958 {
2959 /* An array with one entry for each opd function descriptor,
2960 and some spares since opd entries may be either 16 or 24 bytes. */
2961 #define OPD_NDX(OFF) ((OFF) >> 4)
2962 struct _opd_sec_data
2963 {
2964 /* Points to the function code section for local opd entries. */
2965 asection **func_sec;
2966
2967 /* After editing .opd, adjust references to opd local syms. */
2968 long *adjust;
2969 } opd;
2970
2971 /* An array for toc sections, indexed by offset/8. */
2972 struct _toc_sec_data
2973 {
2974 /* Specifies the relocation symbol index used at a given toc offset. */
2975 unsigned *symndx;
2976
2977 /* And the relocation addend. */
2978 bfd_vma *add;
2979 } toc;
2980 } u;
2981
2982 enum _ppc64_sec_type sec_type:2;
2983
2984 /* Flag set when small branches are detected. Used to
2985 select suitable defaults for the stub group size. */
2986 unsigned int has_14bit_branch:1;
2987 };
2988
2989 #define ppc64_elf_section_data(sec) \
2990 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2991
2992 static bfd_boolean
2993 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2994 {
2995 if (!sec->used_by_bfd)
2996 {
2997 struct _ppc64_elf_section_data *sdata;
2998 bfd_size_type amt = sizeof (*sdata);
2999
3000 sdata = bfd_zalloc (abfd, amt);
3001 if (sdata == NULL)
3002 return FALSE;
3003 sec->used_by_bfd = sdata;
3004 }
3005
3006 return _bfd_elf_new_section_hook (abfd, sec);
3007 }
3008
3009 static struct _opd_sec_data *
3010 get_opd_info (asection * sec)
3011 {
3012 if (sec != NULL
3013 && ppc64_elf_section_data (sec) != NULL
3014 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3015 return &ppc64_elf_section_data (sec)->u.opd;
3016 return NULL;
3017 }
3018 \f
3019 /* Parameters for the qsort hook. */
3020 static bfd_boolean synthetic_relocatable;
3021
3022 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3023
3024 static int
3025 compare_symbols (const void *ap, const void *bp)
3026 {
3027 const asymbol *a = * (const asymbol **) ap;
3028 const asymbol *b = * (const asymbol **) bp;
3029
3030 /* Section symbols first. */
3031 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3032 return -1;
3033 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3034 return 1;
3035
3036 /* then .opd symbols. */
3037 if (strcmp (a->section->name, ".opd") == 0
3038 && strcmp (b->section->name, ".opd") != 0)
3039 return -1;
3040 if (strcmp (a->section->name, ".opd") != 0
3041 && strcmp (b->section->name, ".opd") == 0)
3042 return 1;
3043
3044 /* then other code symbols. */
3045 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3046 == (SEC_CODE | SEC_ALLOC)
3047 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3048 != (SEC_CODE | SEC_ALLOC))
3049 return -1;
3050
3051 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3052 != (SEC_CODE | SEC_ALLOC)
3053 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3054 == (SEC_CODE | SEC_ALLOC))
3055 return 1;
3056
3057 if (synthetic_relocatable)
3058 {
3059 if (a->section->id < b->section->id)
3060 return -1;
3061
3062 if (a->section->id > b->section->id)
3063 return 1;
3064 }
3065
3066 if (a->value + a->section->vma < b->value + b->section->vma)
3067 return -1;
3068
3069 if (a->value + a->section->vma > b->value + b->section->vma)
3070 return 1;
3071
3072 /* For syms with the same value, prefer strong dynamic global function
3073 syms over other syms. */
3074 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3075 return -1;
3076
3077 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3078 return 1;
3079
3080 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3081 return -1;
3082
3083 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3084 return 1;
3085
3086 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3087 return -1;
3088
3089 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3090 return 1;
3091
3092 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3093 return -1;
3094
3095 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3096 return 1;
3097
3098 return 0;
3099 }
3100
3101 /* Search SYMS for a symbol of the given VALUE. */
3102
3103 static asymbol *
3104 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3105 {
3106 long mid;
3107
3108 if (id == (unsigned) -1)
3109 {
3110 while (lo < hi)
3111 {
3112 mid = (lo + hi) >> 1;
3113 if (syms[mid]->value + syms[mid]->section->vma < value)
3114 lo = mid + 1;
3115 else if (syms[mid]->value + syms[mid]->section->vma > value)
3116 hi = mid;
3117 else
3118 return syms[mid];
3119 }
3120 }
3121 else
3122 {
3123 while (lo < hi)
3124 {
3125 mid = (lo + hi) >> 1;
3126 if (syms[mid]->section->id < id)
3127 lo = mid + 1;
3128 else if (syms[mid]->section->id > id)
3129 hi = mid;
3130 else if (syms[mid]->value < value)
3131 lo = mid + 1;
3132 else if (syms[mid]->value > value)
3133 hi = mid;
3134 else
3135 return syms[mid];
3136 }
3137 }
3138 return NULL;
3139 }
3140
3141 static bfd_boolean
3142 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3143 {
3144 bfd_vma vma = *(bfd_vma *) ptr;
3145 return ((section->flags & SEC_ALLOC) != 0
3146 && section->vma <= vma
3147 && vma < section->vma + section->size);
3148 }
3149
3150 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3151 entry syms. Also generate @plt symbols for the glink branch table.
3152 Returns count of synthetic symbols in RET or -1 on error. */
3153
3154 static long
3155 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3156 long static_count, asymbol **static_syms,
3157 long dyn_count, asymbol **dyn_syms,
3158 asymbol **ret)
3159 {
3160 asymbol *s;
3161 long i;
3162 long count;
3163 char *names;
3164 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3165 asection *opd = NULL;
3166 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3167 asymbol **syms;
3168 int abi = abiversion (abfd);
3169
3170 *ret = NULL;
3171
3172 if (abi < 2)
3173 {
3174 opd = bfd_get_section_by_name (abfd, ".opd");
3175 if (opd == NULL && abi == 1)
3176 return 0;
3177 }
3178
3179 symcount = static_count;
3180 if (!relocatable)
3181 symcount += dyn_count;
3182 if (symcount == 0)
3183 return 0;
3184
3185 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3186 if (syms == NULL)
3187 return -1;
3188
3189 if (!relocatable && static_count != 0 && dyn_count != 0)
3190 {
3191 /* Use both symbol tables. */
3192 memcpy (syms, static_syms, static_count * sizeof (*syms));
3193 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3194 }
3195 else if (!relocatable && static_count == 0)
3196 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3197 else
3198 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3199
3200 synthetic_relocatable = relocatable;
3201 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3202
3203 if (!relocatable && symcount > 1)
3204 {
3205 long j;
3206 /* Trim duplicate syms, since we may have merged the normal and
3207 dynamic symbols. Actually, we only care about syms that have
3208 different values, so trim any with the same value. */
3209 for (i = 1, j = 1; i < symcount; ++i)
3210 if (syms[i - 1]->value + syms[i - 1]->section->vma
3211 != syms[i]->value + syms[i]->section->vma)
3212 syms[j++] = syms[i];
3213 symcount = j;
3214 }
3215
3216 i = 0;
3217 if (strcmp (syms[i]->section->name, ".opd") == 0)
3218 ++i;
3219 codesecsym = i;
3220
3221 for (; i < symcount; ++i)
3222 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3223 != (SEC_CODE | SEC_ALLOC))
3224 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3225 break;
3226 codesecsymend = i;
3227
3228 for (; i < symcount; ++i)
3229 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3230 break;
3231 secsymend = i;
3232
3233 for (; i < symcount; ++i)
3234 if (strcmp (syms[i]->section->name, ".opd") != 0)
3235 break;
3236 opdsymend = i;
3237
3238 for (; i < symcount; ++i)
3239 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3240 != (SEC_CODE | SEC_ALLOC))
3241 break;
3242 symcount = i;
3243
3244 count = 0;
3245
3246 if (relocatable)
3247 {
3248 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3249 arelent *r;
3250 size_t size;
3251 long relcount;
3252
3253 if (opdsymend == secsymend)
3254 goto done;
3255
3256 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3257 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3258 if (relcount == 0)
3259 goto done;
3260
3261 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3262 {
3263 count = -1;
3264 goto done;
3265 }
3266
3267 size = 0;
3268 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3269 {
3270 asymbol *sym;
3271
3272 while (r < opd->relocation + relcount
3273 && r->address < syms[i]->value + opd->vma)
3274 ++r;
3275
3276 if (r == opd->relocation + relcount)
3277 break;
3278
3279 if (r->address != syms[i]->value + opd->vma)
3280 continue;
3281
3282 if (r->howto->type != R_PPC64_ADDR64)
3283 continue;
3284
3285 sym = *r->sym_ptr_ptr;
3286 if (!sym_exists_at (syms, opdsymend, symcount,
3287 sym->section->id, sym->value + r->addend))
3288 {
3289 ++count;
3290 size += sizeof (asymbol);
3291 size += strlen (syms[i]->name) + 2;
3292 }
3293 }
3294
3295 if (size == 0)
3296 goto done;
3297 s = *ret = bfd_malloc (size);
3298 if (s == NULL)
3299 {
3300 count = -1;
3301 goto done;
3302 }
3303
3304 names = (char *) (s + count);
3305
3306 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3307 {
3308 asymbol *sym;
3309
3310 while (r < opd->relocation + relcount
3311 && r->address < syms[i]->value + opd->vma)
3312 ++r;
3313
3314 if (r == opd->relocation + relcount)
3315 break;
3316
3317 if (r->address != syms[i]->value + opd->vma)
3318 continue;
3319
3320 if (r->howto->type != R_PPC64_ADDR64)
3321 continue;
3322
3323 sym = *r->sym_ptr_ptr;
3324 if (!sym_exists_at (syms, opdsymend, symcount,
3325 sym->section->id, sym->value + r->addend))
3326 {
3327 size_t len;
3328
3329 *s = *syms[i];
3330 s->flags |= BSF_SYNTHETIC;
3331 s->section = sym->section;
3332 s->value = sym->value + r->addend;
3333 s->name = names;
3334 *names++ = '.';
3335 len = strlen (syms[i]->name);
3336 memcpy (names, syms[i]->name, len + 1);
3337 names += len + 1;
3338 /* Have udata.p point back to the original symbol this
3339 synthetic symbol was derived from. */
3340 s->udata.p = syms[i];
3341 s++;
3342 }
3343 }
3344 }
3345 else
3346 {
3347 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3348 bfd_byte *contents = NULL;
3349 size_t size;
3350 long plt_count = 0;
3351 bfd_vma glink_vma = 0, resolv_vma = 0;
3352 asection *dynamic, *glink = NULL, *relplt = NULL;
3353 arelent *p;
3354
3355 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3356 {
3357 free_contents_and_exit_err:
3358 count = -1;
3359 free_contents_and_exit:
3360 if (contents)
3361 free (contents);
3362 goto done;
3363 }
3364
3365 size = 0;
3366 for (i = secsymend; i < opdsymend; ++i)
3367 {
3368 bfd_vma ent;
3369
3370 /* Ignore bogus symbols. */
3371 if (syms[i]->value > opd->size - 8)
3372 continue;
3373
3374 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3375 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3376 {
3377 ++count;
3378 size += sizeof (asymbol);
3379 size += strlen (syms[i]->name) + 2;
3380 }
3381 }
3382
3383 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3384 if (dyn_count != 0
3385 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3386 {
3387 bfd_byte *dynbuf, *extdyn, *extdynend;
3388 size_t extdynsize;
3389 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3390
3391 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3392 goto free_contents_and_exit_err;
3393
3394 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3395 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3396
3397 extdyn = dynbuf;
3398 extdynend = extdyn + dynamic->size;
3399 for (; extdyn < extdynend; extdyn += extdynsize)
3400 {
3401 Elf_Internal_Dyn dyn;
3402 (*swap_dyn_in) (abfd, extdyn, &dyn);
3403
3404 if (dyn.d_tag == DT_NULL)
3405 break;
3406
3407 if (dyn.d_tag == DT_PPC64_GLINK)
3408 {
3409 /* The first glink stub starts at offset 32; see
3410 comment in ppc64_elf_finish_dynamic_sections. */
3411 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3412 /* The .glink section usually does not survive the final
3413 link; search for the section (usually .text) where the
3414 glink stubs now reside. */
3415 glink = bfd_sections_find_if (abfd, section_covers_vma,
3416 &glink_vma);
3417 break;
3418 }
3419 }
3420
3421 free (dynbuf);
3422 }
3423
3424 if (glink != NULL)
3425 {
3426 /* Determine __glink trampoline by reading the relative branch
3427 from the first glink stub. */
3428 bfd_byte buf[4];
3429 unsigned int off = 0;
3430
3431 while (bfd_get_section_contents (abfd, glink, buf,
3432 glink_vma + off - glink->vma, 4))
3433 {
3434 unsigned int insn = bfd_get_32 (abfd, buf);
3435 insn ^= B_DOT;
3436 if ((insn & ~0x3fffffc) == 0)
3437 {
3438 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3439 break;
3440 }
3441 off += 4;
3442 if (off > 4)
3443 break;
3444 }
3445
3446 if (resolv_vma)
3447 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3448
3449 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3450 if (relplt != NULL)
3451 {
3452 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3453 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3454 goto free_contents_and_exit_err;
3455
3456 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3457 size += plt_count * sizeof (asymbol);
3458
3459 p = relplt->relocation;
3460 for (i = 0; i < plt_count; i++, p++)
3461 {
3462 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3463 if (p->addend != 0)
3464 size += sizeof ("+0x") - 1 + 16;
3465 }
3466 }
3467 }
3468
3469 if (size == 0)
3470 goto free_contents_and_exit;
3471 s = *ret = bfd_malloc (size);
3472 if (s == NULL)
3473 goto free_contents_and_exit_err;
3474
3475 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3476
3477 for (i = secsymend; i < opdsymend; ++i)
3478 {
3479 bfd_vma ent;
3480
3481 if (syms[i]->value > opd->size - 8)
3482 continue;
3483
3484 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3485 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3486 {
3487 long lo, hi;
3488 size_t len;
3489 asection *sec = abfd->sections;
3490
3491 *s = *syms[i];
3492 lo = codesecsym;
3493 hi = codesecsymend;
3494 while (lo < hi)
3495 {
3496 long mid = (lo + hi) >> 1;
3497 if (syms[mid]->section->vma < ent)
3498 lo = mid + 1;
3499 else if (syms[mid]->section->vma > ent)
3500 hi = mid;
3501 else
3502 {
3503 sec = syms[mid]->section;
3504 break;
3505 }
3506 }
3507
3508 if (lo >= hi && lo > codesecsym)
3509 sec = syms[lo - 1]->section;
3510
3511 for (; sec != NULL; sec = sec->next)
3512 {
3513 if (sec->vma > ent)
3514 break;
3515 /* SEC_LOAD may not be set if SEC is from a separate debug
3516 info file. */
3517 if ((sec->flags & SEC_ALLOC) == 0)
3518 break;
3519 if ((sec->flags & SEC_CODE) != 0)
3520 s->section = sec;
3521 }
3522 s->flags |= BSF_SYNTHETIC;
3523 s->value = ent - s->section->vma;
3524 s->name = names;
3525 *names++ = '.';
3526 len = strlen (syms[i]->name);
3527 memcpy (names, syms[i]->name, len + 1);
3528 names += len + 1;
3529 /* Have udata.p point back to the original symbol this
3530 synthetic symbol was derived from. */
3531 s->udata.p = syms[i];
3532 s++;
3533 }
3534 }
3535 free (contents);
3536
3537 if (glink != NULL && relplt != NULL)
3538 {
3539 if (resolv_vma)
3540 {
3541 /* Add a symbol for the main glink trampoline. */
3542 memset (s, 0, sizeof *s);
3543 s->the_bfd = abfd;
3544 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3545 s->section = glink;
3546 s->value = resolv_vma - glink->vma;
3547 s->name = names;
3548 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3549 names += sizeof ("__glink_PLTresolve");
3550 s++;
3551 count++;
3552 }
3553
3554 /* FIXME: It would be very much nicer to put sym@plt on the
3555 stub rather than on the glink branch table entry. The
3556 objdump disassembler would then use a sensible symbol
3557 name on plt calls. The difficulty in doing so is
3558 a) finding the stubs, and,
3559 b) matching stubs against plt entries, and,
3560 c) there can be multiple stubs for a given plt entry.
3561
3562 Solving (a) could be done by code scanning, but older
3563 ppc64 binaries used different stubs to current code.
3564 (b) is the tricky one since you need to known the toc
3565 pointer for at least one function that uses a pic stub to
3566 be able to calculate the plt address referenced.
3567 (c) means gdb would need to set multiple breakpoints (or
3568 find the glink branch itself) when setting breakpoints
3569 for pending shared library loads. */
3570 p = relplt->relocation;
3571 for (i = 0; i < plt_count; i++, p++)
3572 {
3573 size_t len;
3574
3575 *s = **p->sym_ptr_ptr;
3576 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3577 we are defining a symbol, ensure one of them is set. */
3578 if ((s->flags & BSF_LOCAL) == 0)
3579 s->flags |= BSF_GLOBAL;
3580 s->flags |= BSF_SYNTHETIC;
3581 s->section = glink;
3582 s->value = glink_vma - glink->vma;
3583 s->name = names;
3584 s->udata.p = NULL;
3585 len = strlen ((*p->sym_ptr_ptr)->name);
3586 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3587 names += len;
3588 if (p->addend != 0)
3589 {
3590 memcpy (names, "+0x", sizeof ("+0x") - 1);
3591 names += sizeof ("+0x") - 1;
3592 bfd_sprintf_vma (abfd, names, p->addend);
3593 names += strlen (names);
3594 }
3595 memcpy (names, "@plt", sizeof ("@plt"));
3596 names += sizeof ("@plt");
3597 s++;
3598 if (abi < 2)
3599 {
3600 glink_vma += 8;
3601 if (i >= 0x8000)
3602 glink_vma += 4;
3603 }
3604 else
3605 glink_vma += 4;
3606 }
3607 count += plt_count;
3608 }
3609 }
3610
3611 done:
3612 free (syms);
3613 return count;
3614 }
3615 \f
3616 /* The following functions are specific to the ELF linker, while
3617 functions above are used generally. Those named ppc64_elf_* are
3618 called by the main ELF linker code. They appear in this file more
3619 or less in the order in which they are called. eg.
3620 ppc64_elf_check_relocs is called early in the link process,
3621 ppc64_elf_finish_dynamic_sections is one of the last functions
3622 called.
3623
3624 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3625 functions have both a function code symbol and a function descriptor
3626 symbol. A call to foo in a relocatable object file looks like:
3627
3628 . .text
3629 . x:
3630 . bl .foo
3631 . nop
3632
3633 The function definition in another object file might be:
3634
3635 . .section .opd
3636 . foo: .quad .foo
3637 . .quad .TOC.@tocbase
3638 . .quad 0
3639 .
3640 . .text
3641 . .foo: blr
3642
3643 When the linker resolves the call during a static link, the branch
3644 unsurprisingly just goes to .foo and the .opd information is unused.
3645 If the function definition is in a shared library, things are a little
3646 different: The call goes via a plt call stub, the opd information gets
3647 copied to the plt, and the linker patches the nop.
3648
3649 . x:
3650 . bl .foo_stub
3651 . ld 2,40(1)
3652 .
3653 .
3654 . .foo_stub:
3655 . std 2,40(1) # in practice, the call stub
3656 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3657 . addi 11,11,Lfoo@toc@l # this is the general idea
3658 . ld 12,0(11)
3659 . ld 2,8(11)
3660 . mtctr 12
3661 . ld 11,16(11)
3662 . bctr
3663 .
3664 . .section .plt
3665 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3666
3667 The "reloc ()" notation is supposed to indicate that the linker emits
3668 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3669 copying.
3670
3671 What are the difficulties here? Well, firstly, the relocations
3672 examined by the linker in check_relocs are against the function code
3673 sym .foo, while the dynamic relocation in the plt is emitted against
3674 the function descriptor symbol, foo. Somewhere along the line, we need
3675 to carefully copy dynamic link information from one symbol to the other.
3676 Secondly, the generic part of the elf linker will make .foo a dynamic
3677 symbol as is normal for most other backends. We need foo dynamic
3678 instead, at least for an application final link. However, when
3679 creating a shared library containing foo, we need to have both symbols
3680 dynamic so that references to .foo are satisfied during the early
3681 stages of linking. Otherwise the linker might decide to pull in a
3682 definition from some other object, eg. a static library.
3683
3684 Update: As of August 2004, we support a new convention. Function
3685 calls may use the function descriptor symbol, ie. "bl foo". This
3686 behaves exactly as "bl .foo". */
3687
3688 /* Of those relocs that might be copied as dynamic relocs, this function
3689 selects those that must be copied when linking a shared library,
3690 even when the symbol is local. */
3691
3692 static int
3693 must_be_dyn_reloc (struct bfd_link_info *info,
3694 enum elf_ppc64_reloc_type r_type)
3695 {
3696 switch (r_type)
3697 {
3698 default:
3699 return 1;
3700
3701 case R_PPC64_REL32:
3702 case R_PPC64_REL64:
3703 case R_PPC64_REL30:
3704 return 0;
3705
3706 case R_PPC64_TPREL16:
3707 case R_PPC64_TPREL16_LO:
3708 case R_PPC64_TPREL16_HI:
3709 case R_PPC64_TPREL16_HA:
3710 case R_PPC64_TPREL16_DS:
3711 case R_PPC64_TPREL16_LO_DS:
3712 case R_PPC64_TPREL16_HIGH:
3713 case R_PPC64_TPREL16_HIGHA:
3714 case R_PPC64_TPREL16_HIGHER:
3715 case R_PPC64_TPREL16_HIGHERA:
3716 case R_PPC64_TPREL16_HIGHEST:
3717 case R_PPC64_TPREL16_HIGHESTA:
3718 case R_PPC64_TPREL64:
3719 return !bfd_link_executable (info);
3720 }
3721 }
3722
3723 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3724 copying dynamic variables from a shared lib into an app's dynbss
3725 section, and instead use a dynamic relocation to point into the
3726 shared lib. With code that gcc generates, it's vital that this be
3727 enabled; In the PowerPC64 ABI, the address of a function is actually
3728 the address of a function descriptor, which resides in the .opd
3729 section. gcc uses the descriptor directly rather than going via the
3730 GOT as some other ABI's do, which means that initialized function
3731 pointers must reference the descriptor. Thus, a function pointer
3732 initialized to the address of a function in a shared library will
3733 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3734 redefines the function descriptor symbol to point to the copy. This
3735 presents a problem as a plt entry for that function is also
3736 initialized from the function descriptor symbol and the copy reloc
3737 may not be initialized first. */
3738 #define ELIMINATE_COPY_RELOCS 1
3739
3740 /* Section name for stubs is the associated section name plus this
3741 string. */
3742 #define STUB_SUFFIX ".stub"
3743
3744 /* Linker stubs.
3745 ppc_stub_long_branch:
3746 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3747 destination, but a 24 bit branch in a stub section will reach.
3748 . b dest
3749
3750 ppc_stub_plt_branch:
3751 Similar to the above, but a 24 bit branch in the stub section won't
3752 reach its destination.
3753 . addis %r11,%r2,xxx@toc@ha
3754 . ld %r12,xxx@toc@l(%r11)
3755 . mtctr %r12
3756 . bctr
3757
3758 ppc_stub_plt_call:
3759 Used to call a function in a shared library. If it so happens that
3760 the plt entry referenced crosses a 64k boundary, then an extra
3761 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3762 . std %r2,40(%r1)
3763 . addis %r11,%r2,xxx@toc@ha
3764 . ld %r12,xxx+0@toc@l(%r11)
3765 . mtctr %r12
3766 . ld %r2,xxx+8@toc@l(%r11)
3767 . ld %r11,xxx+16@toc@l(%r11)
3768 . bctr
3769
3770 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3771 code to adjust the value and save r2 to support multiple toc sections.
3772 A ppc_stub_long_branch with an r2 offset looks like:
3773 . std %r2,40(%r1)
3774 . addis %r2,%r2,off@ha
3775 . addi %r2,%r2,off@l
3776 . b dest
3777
3778 A ppc_stub_plt_branch with an r2 offset looks like:
3779 . std %r2,40(%r1)
3780 . addis %r11,%r2,xxx@toc@ha
3781 . ld %r12,xxx@toc@l(%r11)
3782 . addis %r2,%r2,off@ha
3783 . addi %r2,%r2,off@l
3784 . mtctr %r12
3785 . bctr
3786
3787 In cases where the "addis" instruction would add zero, the "addis" is
3788 omitted and following instructions modified slightly in some cases.
3789 */
3790
3791 enum ppc_stub_type {
3792 ppc_stub_none,
3793 ppc_stub_long_branch,
3794 ppc_stub_long_branch_r2off,
3795 ppc_stub_plt_branch,
3796 ppc_stub_plt_branch_r2off,
3797 ppc_stub_plt_call,
3798 ppc_stub_plt_call_r2save,
3799 ppc_stub_global_entry
3800 };
3801
3802 struct ppc_stub_hash_entry {
3803
3804 /* Base hash table entry structure. */
3805 struct bfd_hash_entry root;
3806
3807 enum ppc_stub_type stub_type;
3808
3809 /* The stub section. */
3810 asection *stub_sec;
3811
3812 /* Offset within stub_sec of the beginning of this stub. */
3813 bfd_vma stub_offset;
3814
3815 /* Given the symbol's value and its section we can determine its final
3816 value when building the stubs (so the stub knows where to jump. */
3817 bfd_vma target_value;
3818 asection *target_section;
3819
3820 /* The symbol table entry, if any, that this was derived from. */
3821 struct ppc_link_hash_entry *h;
3822 struct plt_entry *plt_ent;
3823
3824 /* Where this stub is being called from, or, in the case of combined
3825 stub sections, the first input section in the group. */
3826 asection *id_sec;
3827
3828 /* Symbol st_other. */
3829 unsigned char other;
3830 };
3831
3832 struct ppc_branch_hash_entry {
3833
3834 /* Base hash table entry structure. */
3835 struct bfd_hash_entry root;
3836
3837 /* Offset within branch lookup table. */
3838 unsigned int offset;
3839
3840 /* Generation marker. */
3841 unsigned int iter;
3842 };
3843
3844 /* Used to track dynamic relocations for local symbols. */
3845 struct ppc_dyn_relocs
3846 {
3847 struct ppc_dyn_relocs *next;
3848
3849 /* The input section of the reloc. */
3850 asection *sec;
3851
3852 /* Total number of relocs copied for the input section. */
3853 unsigned int count : 31;
3854
3855 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3856 unsigned int ifunc : 1;
3857 };
3858
3859 struct ppc_link_hash_entry
3860 {
3861 struct elf_link_hash_entry elf;
3862
3863 union {
3864 /* A pointer to the most recently used stub hash entry against this
3865 symbol. */
3866 struct ppc_stub_hash_entry *stub_cache;
3867
3868 /* A pointer to the next symbol starting with a '.' */
3869 struct ppc_link_hash_entry *next_dot_sym;
3870 } u;
3871
3872 /* Track dynamic relocs copied for this symbol. */
3873 struct elf_dyn_relocs *dyn_relocs;
3874
3875 /* Link between function code and descriptor symbols. */
3876 struct ppc_link_hash_entry *oh;
3877
3878 /* Flag function code and descriptor symbols. */
3879 unsigned int is_func:1;
3880 unsigned int is_func_descriptor:1;
3881 unsigned int fake:1;
3882
3883 /* Whether global opd/toc sym has been adjusted or not.
3884 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3885 should be set for all globals defined in any opd/toc section. */
3886 unsigned int adjust_done:1;
3887
3888 /* Set if we twiddled this symbol to weak at some stage. */
3889 unsigned int was_undefined:1;
3890
3891 /* Contexts in which symbol is used in the GOT (or TOC).
3892 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3893 corresponding relocs are encountered during check_relocs.
3894 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3895 indicate the corresponding GOT entry type is not needed.
3896 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3897 a TPREL one. We use a separate flag rather than setting TPREL
3898 just for convenience in distinguishing the two cases. */
3899 #define TLS_GD 1 /* GD reloc. */
3900 #define TLS_LD 2 /* LD reloc. */
3901 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3902 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3903 #define TLS_TLS 16 /* Any TLS reloc. */
3904 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3905 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3906 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3907 unsigned char tls_mask;
3908 };
3909
3910 /* ppc64 ELF linker hash table. */
3911
3912 struct ppc_link_hash_table
3913 {
3914 struct elf_link_hash_table elf;
3915
3916 /* The stub hash table. */
3917 struct bfd_hash_table stub_hash_table;
3918
3919 /* Another hash table for plt_branch stubs. */
3920 struct bfd_hash_table branch_hash_table;
3921
3922 /* Hash table for function prologue tocsave. */
3923 htab_t tocsave_htab;
3924
3925 /* Various options and other info passed from the linker. */
3926 struct ppc64_elf_params *params;
3927
3928 /* Array to keep track of which stub sections have been created, and
3929 information on stub grouping. */
3930 struct map_stub {
3931 /* This is the section to which stubs in the group will be attached. */
3932 asection *link_sec;
3933 /* The stub section. */
3934 asection *stub_sec;
3935 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3936 bfd_vma toc_off;
3937 } *stub_group;
3938
3939 /* Temp used when calculating TOC pointers. */
3940 bfd_vma toc_curr;
3941 bfd *toc_bfd;
3942 asection *toc_first_sec;
3943
3944 /* Highest input section id. */
3945 unsigned int top_id;
3946
3947 /* Highest output section index. */
3948 unsigned int top_index;
3949
3950 /* Used when adding symbols. */
3951 struct ppc_link_hash_entry *dot_syms;
3952
3953 /* List of input sections for each output section. */
3954 asection **input_list;
3955
3956 /* Shortcuts to get to dynamic linker sections. */
3957 asection *dynbss;
3958 asection *relbss;
3959 asection *glink;
3960 asection *sfpr;
3961 asection *brlt;
3962 asection *relbrlt;
3963 asection *glink_eh_frame;
3964
3965 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3966 struct ppc_link_hash_entry *tls_get_addr;
3967 struct ppc_link_hash_entry *tls_get_addr_fd;
3968
3969 /* The size of reliplt used by got entry relocs. */
3970 bfd_size_type got_reli_size;
3971
3972 /* Statistics. */
3973 unsigned long stub_count[ppc_stub_global_entry];
3974
3975 /* Number of stubs against global syms. */
3976 unsigned long stub_globals;
3977
3978 /* Set if we're linking code with function descriptors. */
3979 unsigned int opd_abi:1;
3980
3981 /* Support for multiple toc sections. */
3982 unsigned int do_multi_toc:1;
3983 unsigned int multi_toc_needed:1;
3984 unsigned int second_toc_pass:1;
3985 unsigned int do_toc_opt:1;
3986
3987 /* Set on error. */
3988 unsigned int stub_error:1;
3989
3990 /* Temp used by ppc64_elf_before_check_relocs. */
3991 unsigned int twiddled_syms:1;
3992
3993 /* Incremented every time we size stubs. */
3994 unsigned int stub_iteration;
3995
3996 /* Small local sym cache. */
3997 struct sym_cache sym_cache;
3998 };
3999
4000 /* Rename some of the generic section flags to better document how they
4001 are used here. */
4002
4003 /* Nonzero if this section has TLS related relocations. */
4004 #define has_tls_reloc sec_flg0
4005
4006 /* Nonzero if this section has a call to __tls_get_addr. */
4007 #define has_tls_get_addr_call sec_flg1
4008
4009 /* Nonzero if this section has any toc or got relocs. */
4010 #define has_toc_reloc sec_flg2
4011
4012 /* Nonzero if this section has a call to another section that uses
4013 the toc or got. */
4014 #define makes_toc_func_call sec_flg3
4015
4016 /* Recursion protection when determining above flag. */
4017 #define call_check_in_progress sec_flg4
4018 #define call_check_done sec_flg5
4019
4020 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4021
4022 #define ppc_hash_table(p) \
4023 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4024 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4025
4026 #define ppc_stub_hash_lookup(table, string, create, copy) \
4027 ((struct ppc_stub_hash_entry *) \
4028 bfd_hash_lookup ((table), (string), (create), (copy)))
4029
4030 #define ppc_branch_hash_lookup(table, string, create, copy) \
4031 ((struct ppc_branch_hash_entry *) \
4032 bfd_hash_lookup ((table), (string), (create), (copy)))
4033
4034 /* Create an entry in the stub hash table. */
4035
4036 static struct bfd_hash_entry *
4037 stub_hash_newfunc (struct bfd_hash_entry *entry,
4038 struct bfd_hash_table *table,
4039 const char *string)
4040 {
4041 /* Allocate the structure if it has not already been allocated by a
4042 subclass. */
4043 if (entry == NULL)
4044 {
4045 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4046 if (entry == NULL)
4047 return entry;
4048 }
4049
4050 /* Call the allocation method of the superclass. */
4051 entry = bfd_hash_newfunc (entry, table, string);
4052 if (entry != NULL)
4053 {
4054 struct ppc_stub_hash_entry *eh;
4055
4056 /* Initialize the local fields. */
4057 eh = (struct ppc_stub_hash_entry *) entry;
4058 eh->stub_type = ppc_stub_none;
4059 eh->stub_sec = NULL;
4060 eh->stub_offset = 0;
4061 eh->target_value = 0;
4062 eh->target_section = NULL;
4063 eh->h = NULL;
4064 eh->plt_ent = NULL;
4065 eh->id_sec = NULL;
4066 eh->other = 0;
4067 }
4068
4069 return entry;
4070 }
4071
4072 /* Create an entry in the branch hash table. */
4073
4074 static struct bfd_hash_entry *
4075 branch_hash_newfunc (struct bfd_hash_entry *entry,
4076 struct bfd_hash_table *table,
4077 const char *string)
4078 {
4079 /* Allocate the structure if it has not already been allocated by a
4080 subclass. */
4081 if (entry == NULL)
4082 {
4083 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4084 if (entry == NULL)
4085 return entry;
4086 }
4087
4088 /* Call the allocation method of the superclass. */
4089 entry = bfd_hash_newfunc (entry, table, string);
4090 if (entry != NULL)
4091 {
4092 struct ppc_branch_hash_entry *eh;
4093
4094 /* Initialize the local fields. */
4095 eh = (struct ppc_branch_hash_entry *) entry;
4096 eh->offset = 0;
4097 eh->iter = 0;
4098 }
4099
4100 return entry;
4101 }
4102
4103 /* Create an entry in a ppc64 ELF linker hash table. */
4104
4105 static struct bfd_hash_entry *
4106 link_hash_newfunc (struct bfd_hash_entry *entry,
4107 struct bfd_hash_table *table,
4108 const char *string)
4109 {
4110 /* Allocate the structure if it has not already been allocated by a
4111 subclass. */
4112 if (entry == NULL)
4113 {
4114 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4115 if (entry == NULL)
4116 return entry;
4117 }
4118
4119 /* Call the allocation method of the superclass. */
4120 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4121 if (entry != NULL)
4122 {
4123 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4124
4125 memset (&eh->u.stub_cache, 0,
4126 (sizeof (struct ppc_link_hash_entry)
4127 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4128
4129 /* When making function calls, old ABI code references function entry
4130 points (dot symbols), while new ABI code references the function
4131 descriptor symbol. We need to make any combination of reference and
4132 definition work together, without breaking archive linking.
4133
4134 For a defined function "foo" and an undefined call to "bar":
4135 An old object defines "foo" and ".foo", references ".bar" (possibly
4136 "bar" too).
4137 A new object defines "foo" and references "bar".
4138
4139 A new object thus has no problem with its undefined symbols being
4140 satisfied by definitions in an old object. On the other hand, the
4141 old object won't have ".bar" satisfied by a new object.
4142
4143 Keep a list of newly added dot-symbols. */
4144
4145 if (string[0] == '.')
4146 {
4147 struct ppc_link_hash_table *htab;
4148
4149 htab = (struct ppc_link_hash_table *) table;
4150 eh->u.next_dot_sym = htab->dot_syms;
4151 htab->dot_syms = eh;
4152 }
4153 }
4154
4155 return entry;
4156 }
4157
4158 struct tocsave_entry {
4159 asection *sec;
4160 bfd_vma offset;
4161 };
4162
4163 static hashval_t
4164 tocsave_htab_hash (const void *p)
4165 {
4166 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4167 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4168 }
4169
4170 static int
4171 tocsave_htab_eq (const void *p1, const void *p2)
4172 {
4173 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4174 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4175 return e1->sec == e2->sec && e1->offset == e2->offset;
4176 }
4177
4178 /* Destroy a ppc64 ELF linker hash table. */
4179
4180 static void
4181 ppc64_elf_link_hash_table_free (bfd *obfd)
4182 {
4183 struct ppc_link_hash_table *htab;
4184
4185 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4186 if (htab->tocsave_htab)
4187 htab_delete (htab->tocsave_htab);
4188 bfd_hash_table_free (&htab->branch_hash_table);
4189 bfd_hash_table_free (&htab->stub_hash_table);
4190 _bfd_elf_link_hash_table_free (obfd);
4191 }
4192
4193 /* Create a ppc64 ELF linker hash table. */
4194
4195 static struct bfd_link_hash_table *
4196 ppc64_elf_link_hash_table_create (bfd *abfd)
4197 {
4198 struct ppc_link_hash_table *htab;
4199 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4200
4201 htab = bfd_zmalloc (amt);
4202 if (htab == NULL)
4203 return NULL;
4204
4205 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4206 sizeof (struct ppc_link_hash_entry),
4207 PPC64_ELF_DATA))
4208 {
4209 free (htab);
4210 return NULL;
4211 }
4212
4213 /* Init the stub hash table too. */
4214 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4215 sizeof (struct ppc_stub_hash_entry)))
4216 {
4217 _bfd_elf_link_hash_table_free (abfd);
4218 return NULL;
4219 }
4220
4221 /* And the branch hash table. */
4222 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4223 sizeof (struct ppc_branch_hash_entry)))
4224 {
4225 bfd_hash_table_free (&htab->stub_hash_table);
4226 _bfd_elf_link_hash_table_free (abfd);
4227 return NULL;
4228 }
4229
4230 htab->tocsave_htab = htab_try_create (1024,
4231 tocsave_htab_hash,
4232 tocsave_htab_eq,
4233 NULL);
4234 if (htab->tocsave_htab == NULL)
4235 {
4236 ppc64_elf_link_hash_table_free (abfd);
4237 return NULL;
4238 }
4239 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4240
4241 /* Initializing two fields of the union is just cosmetic. We really
4242 only care about glist, but when compiled on a 32-bit host the
4243 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4244 debugger inspection of these fields look nicer. */
4245 htab->elf.init_got_refcount.refcount = 0;
4246 htab->elf.init_got_refcount.glist = NULL;
4247 htab->elf.init_plt_refcount.refcount = 0;
4248 htab->elf.init_plt_refcount.glist = NULL;
4249 htab->elf.init_got_offset.offset = 0;
4250 htab->elf.init_got_offset.glist = NULL;
4251 htab->elf.init_plt_offset.offset = 0;
4252 htab->elf.init_plt_offset.glist = NULL;
4253
4254 return &htab->elf.root;
4255 }
4256
4257 /* Create sections for linker generated code. */
4258
4259 static bfd_boolean
4260 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4261 {
4262 struct ppc_link_hash_table *htab;
4263 flagword flags;
4264
4265 htab = ppc_hash_table (info);
4266
4267 /* Create .sfpr for code to save and restore fp regs. */
4268 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4269 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4270 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4271 flags);
4272 if (htab->sfpr == NULL
4273 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4274 return FALSE;
4275
4276 /* Create .glink for lazy dynamic linking support. */
4277 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4278 flags);
4279 if (htab->glink == NULL
4280 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4281 return FALSE;
4282
4283 if (!info->no_ld_generated_unwind_info)
4284 {
4285 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4286 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4287 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4288 ".eh_frame",
4289 flags);
4290 if (htab->glink_eh_frame == NULL
4291 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4292 return FALSE;
4293 }
4294
4295 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4296 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4297 if (htab->elf.iplt == NULL
4298 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4299 return FALSE;
4300
4301 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4302 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4303 htab->elf.irelplt
4304 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4305 if (htab->elf.irelplt == NULL
4306 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4307 return FALSE;
4308
4309 /* Create branch lookup table for plt_branch stubs. */
4310 flags = (SEC_ALLOC | SEC_LOAD
4311 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4312 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4313 flags);
4314 if (htab->brlt == NULL
4315 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4316 return FALSE;
4317
4318 if (!bfd_link_pic (info))
4319 return TRUE;
4320
4321 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4322 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4323 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4324 ".rela.branch_lt",
4325 flags);
4326 if (htab->relbrlt == NULL
4327 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4328 return FALSE;
4329
4330 return TRUE;
4331 }
4332
4333 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4334
4335 bfd_boolean
4336 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4337 struct ppc64_elf_params *params)
4338 {
4339 struct ppc_link_hash_table *htab;
4340
4341 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4342
4343 /* Always hook our dynamic sections into the first bfd, which is the
4344 linker created stub bfd. This ensures that the GOT header is at
4345 the start of the output TOC section. */
4346 htab = ppc_hash_table (info);
4347 if (htab == NULL)
4348 return FALSE;
4349 htab->elf.dynobj = params->stub_bfd;
4350 htab->params = params;
4351
4352 if (bfd_link_relocatable (info))
4353 return TRUE;
4354
4355 return create_linkage_sections (htab->elf.dynobj, info);
4356 }
4357
4358 /* Build a name for an entry in the stub hash table. */
4359
4360 static char *
4361 ppc_stub_name (const asection *input_section,
4362 const asection *sym_sec,
4363 const struct ppc_link_hash_entry *h,
4364 const Elf_Internal_Rela *rel)
4365 {
4366 char *stub_name;
4367 ssize_t len;
4368
4369 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4370 offsets from a sym as a branch target? In fact, we could
4371 probably assume the addend is always zero. */
4372 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4373
4374 if (h)
4375 {
4376 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4377 stub_name = bfd_malloc (len);
4378 if (stub_name == NULL)
4379 return stub_name;
4380
4381 len = sprintf (stub_name, "%08x.%s+%x",
4382 input_section->id & 0xffffffff,
4383 h->elf.root.root.string,
4384 (int) rel->r_addend & 0xffffffff);
4385 }
4386 else
4387 {
4388 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4389 stub_name = bfd_malloc (len);
4390 if (stub_name == NULL)
4391 return stub_name;
4392
4393 len = sprintf (stub_name, "%08x.%x:%x+%x",
4394 input_section->id & 0xffffffff,
4395 sym_sec->id & 0xffffffff,
4396 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4397 (int) rel->r_addend & 0xffffffff);
4398 }
4399 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4400 stub_name[len - 2] = 0;
4401 return stub_name;
4402 }
4403
4404 /* Look up an entry in the stub hash. Stub entries are cached because
4405 creating the stub name takes a bit of time. */
4406
4407 static struct ppc_stub_hash_entry *
4408 ppc_get_stub_entry (const asection *input_section,
4409 const asection *sym_sec,
4410 struct ppc_link_hash_entry *h,
4411 const Elf_Internal_Rela *rel,
4412 struct ppc_link_hash_table *htab)
4413 {
4414 struct ppc_stub_hash_entry *stub_entry;
4415 const asection *id_sec;
4416
4417 /* If this input section is part of a group of sections sharing one
4418 stub section, then use the id of the first section in the group.
4419 Stub names need to include a section id, as there may well be
4420 more than one stub used to reach say, printf, and we need to
4421 distinguish between them. */
4422 id_sec = htab->stub_group[input_section->id].link_sec;
4423
4424 if (h != NULL && h->u.stub_cache != NULL
4425 && h->u.stub_cache->h == h
4426 && h->u.stub_cache->id_sec == id_sec)
4427 {
4428 stub_entry = h->u.stub_cache;
4429 }
4430 else
4431 {
4432 char *stub_name;
4433
4434 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4435 if (stub_name == NULL)
4436 return NULL;
4437
4438 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4439 stub_name, FALSE, FALSE);
4440 if (h != NULL)
4441 h->u.stub_cache = stub_entry;
4442
4443 free (stub_name);
4444 }
4445
4446 return stub_entry;
4447 }
4448
4449 /* Add a new stub entry to the stub hash. Not all fields of the new
4450 stub entry are initialised. */
4451
4452 static struct ppc_stub_hash_entry *
4453 ppc_add_stub (const char *stub_name,
4454 asection *section,
4455 struct bfd_link_info *info)
4456 {
4457 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4458 asection *link_sec;
4459 asection *stub_sec;
4460 struct ppc_stub_hash_entry *stub_entry;
4461
4462 link_sec = htab->stub_group[section->id].link_sec;
4463 stub_sec = htab->stub_group[section->id].stub_sec;
4464 if (stub_sec == NULL)
4465 {
4466 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4467 if (stub_sec == NULL)
4468 {
4469 size_t namelen;
4470 bfd_size_type len;
4471 char *s_name;
4472
4473 namelen = strlen (link_sec->name);
4474 len = namelen + sizeof (STUB_SUFFIX);
4475 s_name = bfd_alloc (htab->params->stub_bfd, len);
4476 if (s_name == NULL)
4477 return NULL;
4478
4479 memcpy (s_name, link_sec->name, namelen);
4480 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4481 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4482 if (stub_sec == NULL)
4483 return NULL;
4484 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4485 }
4486 htab->stub_group[section->id].stub_sec = stub_sec;
4487 }
4488
4489 /* Enter this entry into the linker stub hash table. */
4490 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4491 TRUE, FALSE);
4492 if (stub_entry == NULL)
4493 {
4494 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4495 section->owner, stub_name);
4496 return NULL;
4497 }
4498
4499 stub_entry->stub_sec = stub_sec;
4500 stub_entry->stub_offset = 0;
4501 stub_entry->id_sec = link_sec;
4502 return stub_entry;
4503 }
4504
4505 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4506 not already done. */
4507
4508 static bfd_boolean
4509 create_got_section (bfd *abfd, struct bfd_link_info *info)
4510 {
4511 asection *got, *relgot;
4512 flagword flags;
4513 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4514
4515 if (!is_ppc64_elf (abfd))
4516 return FALSE;
4517 if (htab == NULL)
4518 return FALSE;
4519
4520 if (!htab->elf.sgot
4521 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4522 return FALSE;
4523
4524 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4525 | SEC_LINKER_CREATED);
4526
4527 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4528 if (!got
4529 || !bfd_set_section_alignment (abfd, got, 3))
4530 return FALSE;
4531
4532 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4533 flags | SEC_READONLY);
4534 if (!relgot
4535 || ! bfd_set_section_alignment (abfd, relgot, 3))
4536 return FALSE;
4537
4538 ppc64_elf_tdata (abfd)->got = got;
4539 ppc64_elf_tdata (abfd)->relgot = relgot;
4540 return TRUE;
4541 }
4542
4543 /* Create the dynamic sections, and set up shortcuts. */
4544
4545 static bfd_boolean
4546 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4547 {
4548 struct ppc_link_hash_table *htab;
4549
4550 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4551 return FALSE;
4552
4553 htab = ppc_hash_table (info);
4554 if (htab == NULL)
4555 return FALSE;
4556
4557 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4558 if (!bfd_link_pic (info))
4559 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4560
4561 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4562 || (!bfd_link_pic (info) && !htab->relbss))
4563 abort ();
4564
4565 return TRUE;
4566 }
4567
4568 /* Follow indirect and warning symbol links. */
4569
4570 static inline struct bfd_link_hash_entry *
4571 follow_link (struct bfd_link_hash_entry *h)
4572 {
4573 while (h->type == bfd_link_hash_indirect
4574 || h->type == bfd_link_hash_warning)
4575 h = h->u.i.link;
4576 return h;
4577 }
4578
4579 static inline struct elf_link_hash_entry *
4580 elf_follow_link (struct elf_link_hash_entry *h)
4581 {
4582 return (struct elf_link_hash_entry *) follow_link (&h->root);
4583 }
4584
4585 static inline struct ppc_link_hash_entry *
4586 ppc_follow_link (struct ppc_link_hash_entry *h)
4587 {
4588 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4589 }
4590
4591 /* Merge PLT info on FROM with that on TO. */
4592
4593 static void
4594 move_plt_plist (struct ppc_link_hash_entry *from,
4595 struct ppc_link_hash_entry *to)
4596 {
4597 if (from->elf.plt.plist != NULL)
4598 {
4599 if (to->elf.plt.plist != NULL)
4600 {
4601 struct plt_entry **entp;
4602 struct plt_entry *ent;
4603
4604 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4605 {
4606 struct plt_entry *dent;
4607
4608 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4609 if (dent->addend == ent->addend)
4610 {
4611 dent->plt.refcount += ent->plt.refcount;
4612 *entp = ent->next;
4613 break;
4614 }
4615 if (dent == NULL)
4616 entp = &ent->next;
4617 }
4618 *entp = to->elf.plt.plist;
4619 }
4620
4621 to->elf.plt.plist = from->elf.plt.plist;
4622 from->elf.plt.plist = NULL;
4623 }
4624 }
4625
4626 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4627
4628 static void
4629 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4630 struct elf_link_hash_entry *dir,
4631 struct elf_link_hash_entry *ind)
4632 {
4633 struct ppc_link_hash_entry *edir, *eind;
4634
4635 edir = (struct ppc_link_hash_entry *) dir;
4636 eind = (struct ppc_link_hash_entry *) ind;
4637
4638 edir->is_func |= eind->is_func;
4639 edir->is_func_descriptor |= eind->is_func_descriptor;
4640 edir->tls_mask |= eind->tls_mask;
4641 if (eind->oh != NULL)
4642 edir->oh = ppc_follow_link (eind->oh);
4643
4644 /* If called to transfer flags for a weakdef during processing
4645 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4646 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4647 if (!(ELIMINATE_COPY_RELOCS
4648 && eind->elf.root.type != bfd_link_hash_indirect
4649 && edir->elf.dynamic_adjusted))
4650 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4651
4652 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4653 edir->elf.ref_regular |= eind->elf.ref_regular;
4654 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4655 edir->elf.needs_plt |= eind->elf.needs_plt;
4656 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4657
4658 /* Copy over any dynamic relocs we may have on the indirect sym. */
4659 if (eind->dyn_relocs != NULL)
4660 {
4661 if (edir->dyn_relocs != NULL)
4662 {
4663 struct elf_dyn_relocs **pp;
4664 struct elf_dyn_relocs *p;
4665
4666 /* Add reloc counts against the indirect sym to the direct sym
4667 list. Merge any entries against the same section. */
4668 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4669 {
4670 struct elf_dyn_relocs *q;
4671
4672 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4673 if (q->sec == p->sec)
4674 {
4675 q->pc_count += p->pc_count;
4676 q->count += p->count;
4677 *pp = p->next;
4678 break;
4679 }
4680 if (q == NULL)
4681 pp = &p->next;
4682 }
4683 *pp = edir->dyn_relocs;
4684 }
4685
4686 edir->dyn_relocs = eind->dyn_relocs;
4687 eind->dyn_relocs = NULL;
4688 }
4689
4690 /* If we were called to copy over info for a weak sym, that's all.
4691 You might think dyn_relocs need not be copied over; After all,
4692 both syms will be dynamic or both non-dynamic so we're just
4693 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4694 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4695 dyn_relocs in read-only sections, and it does so on what is the
4696 DIR sym here. */
4697 if (eind->elf.root.type != bfd_link_hash_indirect)
4698 return;
4699
4700 /* Copy over got entries that we may have already seen to the
4701 symbol which just became indirect. */
4702 if (eind->elf.got.glist != NULL)
4703 {
4704 if (edir->elf.got.glist != NULL)
4705 {
4706 struct got_entry **entp;
4707 struct got_entry *ent;
4708
4709 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4710 {
4711 struct got_entry *dent;
4712
4713 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4714 if (dent->addend == ent->addend
4715 && dent->owner == ent->owner
4716 && dent->tls_type == ent->tls_type)
4717 {
4718 dent->got.refcount += ent->got.refcount;
4719 *entp = ent->next;
4720 break;
4721 }
4722 if (dent == NULL)
4723 entp = &ent->next;
4724 }
4725 *entp = edir->elf.got.glist;
4726 }
4727
4728 edir->elf.got.glist = eind->elf.got.glist;
4729 eind->elf.got.glist = NULL;
4730 }
4731
4732 /* And plt entries. */
4733 move_plt_plist (eind, edir);
4734
4735 if (eind->elf.dynindx != -1)
4736 {
4737 if (edir->elf.dynindx != -1)
4738 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4739 edir->elf.dynstr_index);
4740 edir->elf.dynindx = eind->elf.dynindx;
4741 edir->elf.dynstr_index = eind->elf.dynstr_index;
4742 eind->elf.dynindx = -1;
4743 eind->elf.dynstr_index = 0;
4744 }
4745 }
4746
4747 /* Find the function descriptor hash entry from the given function code
4748 hash entry FH. Link the entries via their OH fields. */
4749
4750 static struct ppc_link_hash_entry *
4751 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4752 {
4753 struct ppc_link_hash_entry *fdh = fh->oh;
4754
4755 if (fdh == NULL)
4756 {
4757 const char *fd_name = fh->elf.root.root.string + 1;
4758
4759 fdh = (struct ppc_link_hash_entry *)
4760 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4761 if (fdh == NULL)
4762 return fdh;
4763
4764 fdh->is_func_descriptor = 1;
4765 fdh->oh = fh;
4766 fh->is_func = 1;
4767 fh->oh = fdh;
4768 }
4769
4770 return ppc_follow_link (fdh);
4771 }
4772
4773 /* Make a fake function descriptor sym for the code sym FH. */
4774
4775 static struct ppc_link_hash_entry *
4776 make_fdh (struct bfd_link_info *info,
4777 struct ppc_link_hash_entry *fh)
4778 {
4779 bfd *abfd;
4780 asymbol *newsym;
4781 struct bfd_link_hash_entry *bh;
4782 struct ppc_link_hash_entry *fdh;
4783
4784 abfd = fh->elf.root.u.undef.abfd;
4785 newsym = bfd_make_empty_symbol (abfd);
4786 newsym->name = fh->elf.root.root.string + 1;
4787 newsym->section = bfd_und_section_ptr;
4788 newsym->value = 0;
4789 newsym->flags = BSF_WEAK;
4790
4791 bh = NULL;
4792 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4793 newsym->flags, newsym->section,
4794 newsym->value, NULL, FALSE, FALSE,
4795 &bh))
4796 return NULL;
4797
4798 fdh = (struct ppc_link_hash_entry *) bh;
4799 fdh->elf.non_elf = 0;
4800 fdh->fake = 1;
4801 fdh->is_func_descriptor = 1;
4802 fdh->oh = fh;
4803 fh->is_func = 1;
4804 fh->oh = fdh;
4805 return fdh;
4806 }
4807
4808 /* Fix function descriptor symbols defined in .opd sections to be
4809 function type. */
4810
4811 static bfd_boolean
4812 ppc64_elf_add_symbol_hook (bfd *ibfd,
4813 struct bfd_link_info *info,
4814 Elf_Internal_Sym *isym,
4815 const char **name,
4816 flagword *flags ATTRIBUTE_UNUSED,
4817 asection **sec,
4818 bfd_vma *value)
4819 {
4820 if ((ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4821 || ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4822 && (ibfd->flags & DYNAMIC) == 0
4823 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4824 elf_tdata (info->output_bfd)->has_gnu_symbols = elf_gnu_symbol_any;
4825
4826 if (*sec != NULL
4827 && strcmp ((*sec)->name, ".opd") == 0)
4828 {
4829 asection *code_sec;
4830
4831 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4832 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4833 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4834
4835 /* If the symbol is a function defined in .opd, and the function
4836 code is in a discarded group, let it appear to be undefined. */
4837 if (!bfd_link_relocatable (info)
4838 && (*sec)->reloc_count != 0
4839 && opd_entry_value (*sec, *value, &code_sec, NULL,
4840 FALSE) != (bfd_vma) -1
4841 && discarded_section (code_sec))
4842 {
4843 *sec = bfd_und_section_ptr;
4844 isym->st_shndx = SHN_UNDEF;
4845 }
4846 }
4847 else if (*sec != NULL
4848 && strcmp ((*sec)->name, ".toc") == 0
4849 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4850 {
4851 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4852 if (htab != NULL)
4853 htab->params->object_in_toc = 1;
4854 }
4855
4856 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4857 {
4858 if (abiversion (ibfd) == 0)
4859 set_abiversion (ibfd, 2);
4860 else if (abiversion (ibfd) == 1)
4861 {
4862 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4863 " for ABI version 1\n"), name);
4864 bfd_set_error (bfd_error_bad_value);
4865 return FALSE;
4866 }
4867 }
4868
4869 return TRUE;
4870 }
4871
4872 /* Merge non-visibility st_other attributes: local entry point. */
4873
4874 static void
4875 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4876 const Elf_Internal_Sym *isym,
4877 bfd_boolean definition,
4878 bfd_boolean dynamic)
4879 {
4880 if (definition && !dynamic)
4881 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4882 | ELF_ST_VISIBILITY (h->other));
4883 }
4884
4885 /* This function makes an old ABI object reference to ".bar" cause the
4886 inclusion of a new ABI object archive that defines "bar".
4887 NAME is a symbol defined in an archive. Return a symbol in the hash
4888 table that might be satisfied by the archive symbols. */
4889
4890 static struct elf_link_hash_entry *
4891 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4892 struct bfd_link_info *info,
4893 const char *name)
4894 {
4895 struct elf_link_hash_entry *h;
4896 char *dot_name;
4897 size_t len;
4898
4899 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4900 if (h != NULL
4901 /* Don't return this sym if it is a fake function descriptor
4902 created by add_symbol_adjust. */
4903 && !(h->root.type == bfd_link_hash_undefweak
4904 && ((struct ppc_link_hash_entry *) h)->fake))
4905 return h;
4906
4907 if (name[0] == '.')
4908 return h;
4909
4910 len = strlen (name);
4911 dot_name = bfd_alloc (abfd, len + 2);
4912 if (dot_name == NULL)
4913 return (struct elf_link_hash_entry *) 0 - 1;
4914 dot_name[0] = '.';
4915 memcpy (dot_name + 1, name, len + 1);
4916 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4917 bfd_release (abfd, dot_name);
4918 return h;
4919 }
4920
4921 /* This function satisfies all old ABI object references to ".bar" if a
4922 new ABI object defines "bar". Well, at least, undefined dot symbols
4923 are made weak. This stops later archive searches from including an
4924 object if we already have a function descriptor definition. It also
4925 prevents the linker complaining about undefined symbols.
4926 We also check and correct mismatched symbol visibility here. The
4927 most restrictive visibility of the function descriptor and the
4928 function entry symbol is used. */
4929
4930 static bfd_boolean
4931 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4932 {
4933 struct ppc_link_hash_table *htab;
4934 struct ppc_link_hash_entry *fdh;
4935
4936 if (eh->elf.root.type == bfd_link_hash_indirect)
4937 return TRUE;
4938
4939 if (eh->elf.root.type == bfd_link_hash_warning)
4940 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4941
4942 if (eh->elf.root.root.string[0] != '.')
4943 abort ();
4944
4945 htab = ppc_hash_table (info);
4946 if (htab == NULL)
4947 return FALSE;
4948
4949 fdh = lookup_fdh (eh, htab);
4950 if (fdh == NULL)
4951 {
4952 if (!bfd_link_relocatable (info)
4953 && (eh->elf.root.type == bfd_link_hash_undefined
4954 || eh->elf.root.type == bfd_link_hash_undefweak)
4955 && eh->elf.ref_regular)
4956 {
4957 /* Make an undefweak function descriptor sym, which is enough to
4958 pull in an --as-needed shared lib, but won't cause link
4959 errors. Archives are handled elsewhere. */
4960 fdh = make_fdh (info, eh);
4961 if (fdh == NULL)
4962 return FALSE;
4963 fdh->elf.ref_regular = 1;
4964 }
4965 }
4966 else
4967 {
4968 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4969 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4970 if (entry_vis < descr_vis)
4971 fdh->elf.other += entry_vis - descr_vis;
4972 else if (entry_vis > descr_vis)
4973 eh->elf.other += descr_vis - entry_vis;
4974
4975 if ((fdh->elf.root.type == bfd_link_hash_defined
4976 || fdh->elf.root.type == bfd_link_hash_defweak)
4977 && eh->elf.root.type == bfd_link_hash_undefined)
4978 {
4979 eh->elf.root.type = bfd_link_hash_undefweak;
4980 eh->was_undefined = 1;
4981 htab->twiddled_syms = 1;
4982 }
4983 }
4984
4985 return TRUE;
4986 }
4987
4988 /* Set up opd section info and abiversion for IBFD, and process list
4989 of dot-symbols we made in link_hash_newfunc. */
4990
4991 static bfd_boolean
4992 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
4993 {
4994 struct ppc_link_hash_table *htab;
4995 struct ppc_link_hash_entry **p, *eh;
4996 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
4997
4998 if (opd != NULL && opd->size != 0)
4999 {
5000 if (abiversion (ibfd) == 0)
5001 set_abiversion (ibfd, 1);
5002 else if (abiversion (ibfd) == 2)
5003 {
5004 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5005 " version %d\n"),
5006 ibfd, abiversion (ibfd));
5007 bfd_set_error (bfd_error_bad_value);
5008 return FALSE;
5009 }
5010
5011 if ((ibfd->flags & DYNAMIC) == 0
5012 && (opd->flags & SEC_RELOC) != 0
5013 && opd->reloc_count != 0
5014 && !bfd_is_abs_section (opd->output_section))
5015 {
5016 /* Garbage collection needs some extra help with .opd sections.
5017 We don't want to necessarily keep everything referenced by
5018 relocs in .opd, as that would keep all functions. Instead,
5019 if we reference an .opd symbol (a function descriptor), we
5020 want to keep the function code symbol's section. This is
5021 easy for global symbols, but for local syms we need to keep
5022 information about the associated function section. */
5023 bfd_size_type amt;
5024 asection **opd_sym_map;
5025
5026 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5027 opd_sym_map = bfd_zalloc (ibfd, amt);
5028 if (opd_sym_map == NULL)
5029 return FALSE;
5030 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5031 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5032 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5033 }
5034 }
5035
5036 if (!is_ppc64_elf (info->output_bfd))
5037 return TRUE;
5038 htab = ppc_hash_table (info);
5039 if (htab == NULL)
5040 return FALSE;
5041
5042 /* For input files without an explicit abiversion in e_flags
5043 we should have flagged any with symbol st_other bits set
5044 as ELFv1 and above flagged those with .opd as ELFv2.
5045 Set the output abiversion if not yet set, and for any input
5046 still ambiguous, take its abiversion from the output.
5047 Differences in ABI are reported later. */
5048 if (abiversion (info->output_bfd) == 0)
5049 set_abiversion (info->output_bfd, abiversion (ibfd));
5050 else if (abiversion (ibfd) == 0)
5051 set_abiversion (ibfd, abiversion (info->output_bfd));
5052
5053 p = &htab->dot_syms;
5054 while ((eh = *p) != NULL)
5055 {
5056 *p = NULL;
5057 if (&eh->elf == htab->elf.hgot)
5058 ;
5059 else if (htab->elf.hgot == NULL
5060 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5061 htab->elf.hgot = &eh->elf;
5062 else if (!add_symbol_adjust (eh, info))
5063 return FALSE;
5064 p = &eh->u.next_dot_sym;
5065 }
5066
5067 /* Clear the list for non-ppc64 input files. */
5068 p = &htab->dot_syms;
5069 while ((eh = *p) != NULL)
5070 {
5071 *p = NULL;
5072 p = &eh->u.next_dot_sym;
5073 }
5074
5075 /* We need to fix the undefs list for any syms we have twiddled to
5076 undef_weak. */
5077 if (htab->twiddled_syms)
5078 {
5079 bfd_link_repair_undef_list (&htab->elf.root);
5080 htab->twiddled_syms = 0;
5081 }
5082 return TRUE;
5083 }
5084
5085 /* Undo hash table changes when an --as-needed input file is determined
5086 not to be needed. */
5087
5088 static bfd_boolean
5089 ppc64_elf_notice_as_needed (bfd *ibfd,
5090 struct bfd_link_info *info,
5091 enum notice_asneeded_action act)
5092 {
5093 if (act == notice_not_needed)
5094 {
5095 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5096
5097 if (htab == NULL)
5098 return FALSE;
5099
5100 htab->dot_syms = NULL;
5101 }
5102 return _bfd_elf_notice_as_needed (ibfd, info, act);
5103 }
5104
5105 /* If --just-symbols against a final linked binary, then assume we need
5106 toc adjusting stubs when calling functions defined there. */
5107
5108 static void
5109 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5110 {
5111 if ((sec->flags & SEC_CODE) != 0
5112 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5113 && is_ppc64_elf (sec->owner))
5114 {
5115 if (abiversion (sec->owner) >= 2
5116 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5117 sec->has_toc_reloc = 1;
5118 }
5119 _bfd_elf_link_just_syms (sec, info);
5120 }
5121
5122 static struct plt_entry **
5123 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5124 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5125 {
5126 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5127 struct plt_entry **local_plt;
5128 unsigned char *local_got_tls_masks;
5129
5130 if (local_got_ents == NULL)
5131 {
5132 bfd_size_type size = symtab_hdr->sh_info;
5133
5134 size *= (sizeof (*local_got_ents)
5135 + sizeof (*local_plt)
5136 + sizeof (*local_got_tls_masks));
5137 local_got_ents = bfd_zalloc (abfd, size);
5138 if (local_got_ents == NULL)
5139 return NULL;
5140 elf_local_got_ents (abfd) = local_got_ents;
5141 }
5142
5143 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5144 {
5145 struct got_entry *ent;
5146
5147 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5148 if (ent->addend == r_addend
5149 && ent->owner == abfd
5150 && ent->tls_type == tls_type)
5151 break;
5152 if (ent == NULL)
5153 {
5154 bfd_size_type amt = sizeof (*ent);
5155 ent = bfd_alloc (abfd, amt);
5156 if (ent == NULL)
5157 return FALSE;
5158 ent->next = local_got_ents[r_symndx];
5159 ent->addend = r_addend;
5160 ent->owner = abfd;
5161 ent->tls_type = tls_type;
5162 ent->is_indirect = FALSE;
5163 ent->got.refcount = 0;
5164 local_got_ents[r_symndx] = ent;
5165 }
5166 ent->got.refcount += 1;
5167 }
5168
5169 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5170 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5171 local_got_tls_masks[r_symndx] |= tls_type;
5172
5173 return local_plt + r_symndx;
5174 }
5175
5176 static bfd_boolean
5177 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5178 {
5179 struct plt_entry *ent;
5180
5181 for (ent = *plist; ent != NULL; ent = ent->next)
5182 if (ent->addend == addend)
5183 break;
5184 if (ent == NULL)
5185 {
5186 bfd_size_type amt = sizeof (*ent);
5187 ent = bfd_alloc (abfd, amt);
5188 if (ent == NULL)
5189 return FALSE;
5190 ent->next = *plist;
5191 ent->addend = addend;
5192 ent->plt.refcount = 0;
5193 *plist = ent;
5194 }
5195 ent->plt.refcount += 1;
5196 return TRUE;
5197 }
5198
5199 static bfd_boolean
5200 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5201 {
5202 return (r_type == R_PPC64_REL24
5203 || r_type == R_PPC64_REL14
5204 || r_type == R_PPC64_REL14_BRTAKEN
5205 || r_type == R_PPC64_REL14_BRNTAKEN
5206 || r_type == R_PPC64_ADDR24
5207 || r_type == R_PPC64_ADDR14
5208 || r_type == R_PPC64_ADDR14_BRTAKEN
5209 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5210 }
5211
5212 /* Look through the relocs for a section during the first phase, and
5213 calculate needed space in the global offset table, procedure
5214 linkage table, and dynamic reloc sections. */
5215
5216 static bfd_boolean
5217 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5218 asection *sec, const Elf_Internal_Rela *relocs)
5219 {
5220 struct ppc_link_hash_table *htab;
5221 Elf_Internal_Shdr *symtab_hdr;
5222 struct elf_link_hash_entry **sym_hashes;
5223 const Elf_Internal_Rela *rel;
5224 const Elf_Internal_Rela *rel_end;
5225 asection *sreloc;
5226 asection **opd_sym_map;
5227 struct elf_link_hash_entry *tga, *dottga;
5228
5229 if (bfd_link_relocatable (info))
5230 return TRUE;
5231
5232 /* Don't do anything special with non-loaded, non-alloced sections.
5233 In particular, any relocs in such sections should not affect GOT
5234 and PLT reference counting (ie. we don't allow them to create GOT
5235 or PLT entries), there's no possibility or desire to optimize TLS
5236 relocs, and there's not much point in propagating relocs to shared
5237 libs that the dynamic linker won't relocate. */
5238 if ((sec->flags & SEC_ALLOC) == 0)
5239 return TRUE;
5240
5241 BFD_ASSERT (is_ppc64_elf (abfd));
5242
5243 htab = ppc_hash_table (info);
5244 if (htab == NULL)
5245 return FALSE;
5246
5247 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5248 FALSE, FALSE, TRUE);
5249 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5250 FALSE, FALSE, TRUE);
5251 symtab_hdr = &elf_symtab_hdr (abfd);
5252 sym_hashes = elf_sym_hashes (abfd);
5253 sreloc = NULL;
5254 opd_sym_map = NULL;
5255 if (ppc64_elf_section_data (sec) != NULL
5256 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5257 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5258
5259 rel_end = relocs + sec->reloc_count;
5260 for (rel = relocs; rel < rel_end; rel++)
5261 {
5262 unsigned long r_symndx;
5263 struct elf_link_hash_entry *h;
5264 enum elf_ppc64_reloc_type r_type;
5265 int tls_type;
5266 struct _ppc64_elf_section_data *ppc64_sec;
5267 struct plt_entry **ifunc;
5268
5269 r_symndx = ELF64_R_SYM (rel->r_info);
5270 if (r_symndx < symtab_hdr->sh_info)
5271 h = NULL;
5272 else
5273 {
5274 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5275 h = elf_follow_link (h);
5276
5277 /* PR15323, ref flags aren't set for references in the same
5278 object. */
5279 h->root.non_ir_ref = 1;
5280
5281 if (h == htab->elf.hgot)
5282 sec->has_toc_reloc = 1;
5283 }
5284
5285 tls_type = 0;
5286 ifunc = NULL;
5287 if (h != NULL)
5288 {
5289 if (h->type == STT_GNU_IFUNC)
5290 {
5291 h->needs_plt = 1;
5292 ifunc = &h->plt.plist;
5293 }
5294 }
5295 else
5296 {
5297 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5298 abfd, r_symndx);
5299 if (isym == NULL)
5300 return FALSE;
5301
5302 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5303 {
5304 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5305 rel->r_addend, PLT_IFUNC);
5306 if (ifunc == NULL)
5307 return FALSE;
5308 }
5309 }
5310 r_type = ELF64_R_TYPE (rel->r_info);
5311 if (is_branch_reloc (r_type))
5312 {
5313 if (h != NULL && (h == tga || h == dottga))
5314 {
5315 if (rel != relocs
5316 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5317 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5318 /* We have a new-style __tls_get_addr call with a marker
5319 reloc. */
5320 ;
5321 else
5322 /* Mark this section as having an old-style call. */
5323 sec->has_tls_get_addr_call = 1;
5324 }
5325
5326 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5327 if (ifunc != NULL
5328 && !update_plt_info (abfd, ifunc, rel->r_addend))
5329 return FALSE;
5330 }
5331
5332 switch (r_type)
5333 {
5334 case R_PPC64_TLSGD:
5335 case R_PPC64_TLSLD:
5336 /* These special tls relocs tie a call to __tls_get_addr with
5337 its parameter symbol. */
5338 break;
5339
5340 case R_PPC64_GOT_TLSLD16:
5341 case R_PPC64_GOT_TLSLD16_LO:
5342 case R_PPC64_GOT_TLSLD16_HI:
5343 case R_PPC64_GOT_TLSLD16_HA:
5344 tls_type = TLS_TLS | TLS_LD;
5345 goto dogottls;
5346
5347 case R_PPC64_GOT_TLSGD16:
5348 case R_PPC64_GOT_TLSGD16_LO:
5349 case R_PPC64_GOT_TLSGD16_HI:
5350 case R_PPC64_GOT_TLSGD16_HA:
5351 tls_type = TLS_TLS | TLS_GD;
5352 goto dogottls;
5353
5354 case R_PPC64_GOT_TPREL16_DS:
5355 case R_PPC64_GOT_TPREL16_LO_DS:
5356 case R_PPC64_GOT_TPREL16_HI:
5357 case R_PPC64_GOT_TPREL16_HA:
5358 if (bfd_link_pic (info))
5359 info->flags |= DF_STATIC_TLS;
5360 tls_type = TLS_TLS | TLS_TPREL;
5361 goto dogottls;
5362
5363 case R_PPC64_GOT_DTPREL16_DS:
5364 case R_PPC64_GOT_DTPREL16_LO_DS:
5365 case R_PPC64_GOT_DTPREL16_HI:
5366 case R_PPC64_GOT_DTPREL16_HA:
5367 tls_type = TLS_TLS | TLS_DTPREL;
5368 dogottls:
5369 sec->has_tls_reloc = 1;
5370 /* Fall thru */
5371
5372 case R_PPC64_GOT16:
5373 case R_PPC64_GOT16_DS:
5374 case R_PPC64_GOT16_HA:
5375 case R_PPC64_GOT16_HI:
5376 case R_PPC64_GOT16_LO:
5377 case R_PPC64_GOT16_LO_DS:
5378 /* This symbol requires a global offset table entry. */
5379 sec->has_toc_reloc = 1;
5380 if (r_type == R_PPC64_GOT_TLSLD16
5381 || r_type == R_PPC64_GOT_TLSGD16
5382 || r_type == R_PPC64_GOT_TPREL16_DS
5383 || r_type == R_PPC64_GOT_DTPREL16_DS
5384 || r_type == R_PPC64_GOT16
5385 || r_type == R_PPC64_GOT16_DS)
5386 {
5387 htab->do_multi_toc = 1;
5388 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5389 }
5390
5391 if (ppc64_elf_tdata (abfd)->got == NULL
5392 && !create_got_section (abfd, info))
5393 return FALSE;
5394
5395 if (h != NULL)
5396 {
5397 struct ppc_link_hash_entry *eh;
5398 struct got_entry *ent;
5399
5400 eh = (struct ppc_link_hash_entry *) h;
5401 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5402 if (ent->addend == rel->r_addend
5403 && ent->owner == abfd
5404 && ent->tls_type == tls_type)
5405 break;
5406 if (ent == NULL)
5407 {
5408 bfd_size_type amt = sizeof (*ent);
5409 ent = bfd_alloc (abfd, amt);
5410 if (ent == NULL)
5411 return FALSE;
5412 ent->next = eh->elf.got.glist;
5413 ent->addend = rel->r_addend;
5414 ent->owner = abfd;
5415 ent->tls_type = tls_type;
5416 ent->is_indirect = FALSE;
5417 ent->got.refcount = 0;
5418 eh->elf.got.glist = ent;
5419 }
5420 ent->got.refcount += 1;
5421 eh->tls_mask |= tls_type;
5422 }
5423 else
5424 /* This is a global offset table entry for a local symbol. */
5425 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5426 rel->r_addend, tls_type))
5427 return FALSE;
5428
5429 /* We may also need a plt entry if the symbol turns out to be
5430 an ifunc. */
5431 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5432 {
5433 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5434 return FALSE;
5435 }
5436 break;
5437
5438 case R_PPC64_PLT16_HA:
5439 case R_PPC64_PLT16_HI:
5440 case R_PPC64_PLT16_LO:
5441 case R_PPC64_PLT32:
5442 case R_PPC64_PLT64:
5443 /* This symbol requires a procedure linkage table entry. We
5444 actually build the entry in adjust_dynamic_symbol,
5445 because this might be a case of linking PIC code without
5446 linking in any dynamic objects, in which case we don't
5447 need to generate a procedure linkage table after all. */
5448 if (h == NULL)
5449 {
5450 /* It does not make sense to have a procedure linkage
5451 table entry for a local symbol. */
5452 bfd_set_error (bfd_error_bad_value);
5453 return FALSE;
5454 }
5455 else
5456 {
5457 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5458 return FALSE;
5459 h->needs_plt = 1;
5460 if (h->root.root.string[0] == '.'
5461 && h->root.root.string[1] != '\0')
5462 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5463 }
5464 break;
5465
5466 /* The following relocations don't need to propagate the
5467 relocation if linking a shared object since they are
5468 section relative. */
5469 case R_PPC64_SECTOFF:
5470 case R_PPC64_SECTOFF_LO:
5471 case R_PPC64_SECTOFF_HI:
5472 case R_PPC64_SECTOFF_HA:
5473 case R_PPC64_SECTOFF_DS:
5474 case R_PPC64_SECTOFF_LO_DS:
5475 case R_PPC64_DTPREL16:
5476 case R_PPC64_DTPREL16_LO:
5477 case R_PPC64_DTPREL16_HI:
5478 case R_PPC64_DTPREL16_HA:
5479 case R_PPC64_DTPREL16_DS:
5480 case R_PPC64_DTPREL16_LO_DS:
5481 case R_PPC64_DTPREL16_HIGH:
5482 case R_PPC64_DTPREL16_HIGHA:
5483 case R_PPC64_DTPREL16_HIGHER:
5484 case R_PPC64_DTPREL16_HIGHERA:
5485 case R_PPC64_DTPREL16_HIGHEST:
5486 case R_PPC64_DTPREL16_HIGHESTA:
5487 break;
5488
5489 /* Nor do these. */
5490 case R_PPC64_REL16:
5491 case R_PPC64_REL16_LO:
5492 case R_PPC64_REL16_HI:
5493 case R_PPC64_REL16_HA:
5494 break;
5495
5496 /* Not supported as a dynamic relocation. */
5497 case R_PPC64_ADDR64_LOCAL:
5498 if (bfd_link_pic (info))
5499 {
5500 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5501 ppc_howto_init ();
5502 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5503 "in shared libraries and PIEs.\n"),
5504 abfd, sec, rel->r_offset,
5505 ppc64_elf_howto_table[r_type]->name);
5506 bfd_set_error (bfd_error_bad_value);
5507 return FALSE;
5508 }
5509 break;
5510
5511 case R_PPC64_TOC16:
5512 case R_PPC64_TOC16_DS:
5513 htab->do_multi_toc = 1;
5514 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5515 case R_PPC64_TOC16_LO:
5516 case R_PPC64_TOC16_HI:
5517 case R_PPC64_TOC16_HA:
5518 case R_PPC64_TOC16_LO_DS:
5519 sec->has_toc_reloc = 1;
5520 break;
5521
5522 /* This relocation describes the C++ object vtable hierarchy.
5523 Reconstruct it for later use during GC. */
5524 case R_PPC64_GNU_VTINHERIT:
5525 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5526 return FALSE;
5527 break;
5528
5529 /* This relocation describes which C++ vtable entries are actually
5530 used. Record for later use during GC. */
5531 case R_PPC64_GNU_VTENTRY:
5532 BFD_ASSERT (h != NULL);
5533 if (h != NULL
5534 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5535 return FALSE;
5536 break;
5537
5538 case R_PPC64_REL14:
5539 case R_PPC64_REL14_BRTAKEN:
5540 case R_PPC64_REL14_BRNTAKEN:
5541 {
5542 asection *dest = NULL;
5543
5544 /* Heuristic: If jumping outside our section, chances are
5545 we are going to need a stub. */
5546 if (h != NULL)
5547 {
5548 /* If the sym is weak it may be overridden later, so
5549 don't assume we know where a weak sym lives. */
5550 if (h->root.type == bfd_link_hash_defined)
5551 dest = h->root.u.def.section;
5552 }
5553 else
5554 {
5555 Elf_Internal_Sym *isym;
5556
5557 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5558 abfd, r_symndx);
5559 if (isym == NULL)
5560 return FALSE;
5561
5562 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5563 }
5564
5565 if (dest != sec)
5566 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5567 }
5568 /* Fall through. */
5569
5570 case R_PPC64_REL24:
5571 if (h != NULL && ifunc == NULL)
5572 {
5573 /* We may need a .plt entry if the function this reloc
5574 refers to is in a shared lib. */
5575 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5576 return FALSE;
5577 h->needs_plt = 1;
5578 if (h->root.root.string[0] == '.'
5579 && h->root.root.string[1] != '\0')
5580 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5581 if (h == tga || h == dottga)
5582 sec->has_tls_reloc = 1;
5583 }
5584 break;
5585
5586 case R_PPC64_TPREL64:
5587 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5588 if (bfd_link_pic (info))
5589 info->flags |= DF_STATIC_TLS;
5590 goto dotlstoc;
5591
5592 case R_PPC64_DTPMOD64:
5593 if (rel + 1 < rel_end
5594 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5595 && rel[1].r_offset == rel->r_offset + 8)
5596 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5597 else
5598 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5599 goto dotlstoc;
5600
5601 case R_PPC64_DTPREL64:
5602 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5603 if (rel != relocs
5604 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5605 && rel[-1].r_offset == rel->r_offset - 8)
5606 /* This is the second reloc of a dtpmod, dtprel pair.
5607 Don't mark with TLS_DTPREL. */
5608 goto dodyn;
5609
5610 dotlstoc:
5611 sec->has_tls_reloc = 1;
5612 if (h != NULL)
5613 {
5614 struct ppc_link_hash_entry *eh;
5615 eh = (struct ppc_link_hash_entry *) h;
5616 eh->tls_mask |= tls_type;
5617 }
5618 else
5619 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5620 rel->r_addend, tls_type))
5621 return FALSE;
5622
5623 ppc64_sec = ppc64_elf_section_data (sec);
5624 if (ppc64_sec->sec_type != sec_toc)
5625 {
5626 bfd_size_type amt;
5627
5628 /* One extra to simplify get_tls_mask. */
5629 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5630 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5631 if (ppc64_sec->u.toc.symndx == NULL)
5632 return FALSE;
5633 amt = sec->size * sizeof (bfd_vma) / 8;
5634 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5635 if (ppc64_sec->u.toc.add == NULL)
5636 return FALSE;
5637 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5638 ppc64_sec->sec_type = sec_toc;
5639 }
5640 BFD_ASSERT (rel->r_offset % 8 == 0);
5641 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5642 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5643
5644 /* Mark the second slot of a GD or LD entry.
5645 -1 to indicate GD and -2 to indicate LD. */
5646 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5647 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5648 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5649 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5650 goto dodyn;
5651
5652 case R_PPC64_TPREL16:
5653 case R_PPC64_TPREL16_LO:
5654 case R_PPC64_TPREL16_HI:
5655 case R_PPC64_TPREL16_HA:
5656 case R_PPC64_TPREL16_DS:
5657 case R_PPC64_TPREL16_LO_DS:
5658 case R_PPC64_TPREL16_HIGH:
5659 case R_PPC64_TPREL16_HIGHA:
5660 case R_PPC64_TPREL16_HIGHER:
5661 case R_PPC64_TPREL16_HIGHERA:
5662 case R_PPC64_TPREL16_HIGHEST:
5663 case R_PPC64_TPREL16_HIGHESTA:
5664 if (bfd_link_pic (info))
5665 {
5666 info->flags |= DF_STATIC_TLS;
5667 goto dodyn;
5668 }
5669 break;
5670
5671 case R_PPC64_ADDR64:
5672 if (opd_sym_map != NULL
5673 && rel + 1 < rel_end
5674 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5675 {
5676 if (h != NULL)
5677 {
5678 if (h->root.root.string[0] == '.'
5679 && h->root.root.string[1] != 0
5680 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5681 ;
5682 else
5683 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5684 }
5685 else
5686 {
5687 asection *s;
5688 Elf_Internal_Sym *isym;
5689
5690 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5691 abfd, r_symndx);
5692 if (isym == NULL)
5693 return FALSE;
5694
5695 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5696 if (s != NULL && s != sec)
5697 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5698 }
5699 }
5700 /* Fall through. */
5701
5702 case R_PPC64_ADDR16:
5703 case R_PPC64_ADDR16_DS:
5704 case R_PPC64_ADDR16_HA:
5705 case R_PPC64_ADDR16_HI:
5706 case R_PPC64_ADDR16_HIGH:
5707 case R_PPC64_ADDR16_HIGHA:
5708 case R_PPC64_ADDR16_HIGHER:
5709 case R_PPC64_ADDR16_HIGHERA:
5710 case R_PPC64_ADDR16_HIGHEST:
5711 case R_PPC64_ADDR16_HIGHESTA:
5712 case R_PPC64_ADDR16_LO:
5713 case R_PPC64_ADDR16_LO_DS:
5714 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5715 && rel->r_addend == 0)
5716 {
5717 /* We may need a .plt entry if this reloc refers to a
5718 function in a shared lib. */
5719 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5720 return FALSE;
5721 h->pointer_equality_needed = 1;
5722 }
5723 /* Fall through. */
5724
5725 case R_PPC64_REL30:
5726 case R_PPC64_REL32:
5727 case R_PPC64_REL64:
5728 case R_PPC64_ADDR14:
5729 case R_PPC64_ADDR14_BRNTAKEN:
5730 case R_PPC64_ADDR14_BRTAKEN:
5731 case R_PPC64_ADDR24:
5732 case R_PPC64_ADDR32:
5733 case R_PPC64_UADDR16:
5734 case R_PPC64_UADDR32:
5735 case R_PPC64_UADDR64:
5736 case R_PPC64_TOC:
5737 if (h != NULL && !bfd_link_pic (info))
5738 /* We may need a copy reloc. */
5739 h->non_got_ref = 1;
5740
5741 /* Don't propagate .opd relocs. */
5742 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5743 break;
5744
5745 /* If we are creating a shared library, and this is a reloc
5746 against a global symbol, or a non PC relative reloc
5747 against a local symbol, then we need to copy the reloc
5748 into the shared library. However, if we are linking with
5749 -Bsymbolic, we do not need to copy a reloc against a
5750 global symbol which is defined in an object we are
5751 including in the link (i.e., DEF_REGULAR is set). At
5752 this point we have not seen all the input files, so it is
5753 possible that DEF_REGULAR is not set now but will be set
5754 later (it is never cleared). In case of a weak definition,
5755 DEF_REGULAR may be cleared later by a strong definition in
5756 a shared library. We account for that possibility below by
5757 storing information in the dyn_relocs field of the hash
5758 table entry. A similar situation occurs when creating
5759 shared libraries and symbol visibility changes render the
5760 symbol local.
5761
5762 If on the other hand, we are creating an executable, we
5763 may need to keep relocations for symbols satisfied by a
5764 dynamic library if we manage to avoid copy relocs for the
5765 symbol. */
5766 dodyn:
5767 if ((bfd_link_pic (info)
5768 && (must_be_dyn_reloc (info, r_type)
5769 || (h != NULL
5770 && (!SYMBOLIC_BIND (info, h)
5771 || h->root.type == bfd_link_hash_defweak
5772 || !h->def_regular))))
5773 || (ELIMINATE_COPY_RELOCS
5774 && !bfd_link_pic (info)
5775 && h != NULL
5776 && (h->root.type == bfd_link_hash_defweak
5777 || !h->def_regular))
5778 || (!bfd_link_pic (info)
5779 && ifunc != NULL))
5780 {
5781 /* We must copy these reloc types into the output file.
5782 Create a reloc section in dynobj and make room for
5783 this reloc. */
5784 if (sreloc == NULL)
5785 {
5786 sreloc = _bfd_elf_make_dynamic_reloc_section
5787 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5788
5789 if (sreloc == NULL)
5790 return FALSE;
5791 }
5792
5793 /* If this is a global symbol, we count the number of
5794 relocations we need for this symbol. */
5795 if (h != NULL)
5796 {
5797 struct elf_dyn_relocs *p;
5798 struct elf_dyn_relocs **head;
5799
5800 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5801 p = *head;
5802 if (p == NULL || p->sec != sec)
5803 {
5804 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5805 if (p == NULL)
5806 return FALSE;
5807 p->next = *head;
5808 *head = p;
5809 p->sec = sec;
5810 p->count = 0;
5811 p->pc_count = 0;
5812 }
5813 p->count += 1;
5814 if (!must_be_dyn_reloc (info, r_type))
5815 p->pc_count += 1;
5816 }
5817 else
5818 {
5819 /* Track dynamic relocs needed for local syms too.
5820 We really need local syms available to do this
5821 easily. Oh well. */
5822 struct ppc_dyn_relocs *p;
5823 struct ppc_dyn_relocs **head;
5824 bfd_boolean is_ifunc;
5825 asection *s;
5826 void *vpp;
5827 Elf_Internal_Sym *isym;
5828
5829 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5830 abfd, r_symndx);
5831 if (isym == NULL)
5832 return FALSE;
5833
5834 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5835 if (s == NULL)
5836 s = sec;
5837
5838 vpp = &elf_section_data (s)->local_dynrel;
5839 head = (struct ppc_dyn_relocs **) vpp;
5840 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5841 p = *head;
5842 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5843 p = p->next;
5844 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5845 {
5846 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5847 if (p == NULL)
5848 return FALSE;
5849 p->next = *head;
5850 *head = p;
5851 p->sec = sec;
5852 p->ifunc = is_ifunc;
5853 p->count = 0;
5854 }
5855 p->count += 1;
5856 }
5857 }
5858 break;
5859
5860 default:
5861 break;
5862 }
5863 }
5864
5865 return TRUE;
5866 }
5867
5868 /* Merge backend specific data from an object file to the output
5869 object file when linking. */
5870
5871 static bfd_boolean
5872 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5873 {
5874 unsigned long iflags, oflags;
5875
5876 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5877 return TRUE;
5878
5879 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5880 return TRUE;
5881
5882 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5883 return FALSE;
5884
5885 iflags = elf_elfheader (ibfd)->e_flags;
5886 oflags = elf_elfheader (obfd)->e_flags;
5887
5888 if (iflags & ~EF_PPC64_ABI)
5889 {
5890 (*_bfd_error_handler)
5891 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5892 bfd_set_error (bfd_error_bad_value);
5893 return FALSE;
5894 }
5895 else if (iflags != oflags && iflags != 0)
5896 {
5897 (*_bfd_error_handler)
5898 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5899 ibfd, iflags, oflags);
5900 bfd_set_error (bfd_error_bad_value);
5901 return FALSE;
5902 }
5903
5904 /* Merge Tag_compatibility attributes and any common GNU ones. */
5905 _bfd_elf_merge_object_attributes (ibfd, obfd);
5906
5907 return TRUE;
5908 }
5909
5910 static bfd_boolean
5911 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5912 {
5913 /* Print normal ELF private data. */
5914 _bfd_elf_print_private_bfd_data (abfd, ptr);
5915
5916 if (elf_elfheader (abfd)->e_flags != 0)
5917 {
5918 FILE *file = ptr;
5919
5920 /* xgettext:c-format */
5921 fprintf (file, _("private flags = 0x%lx:"),
5922 elf_elfheader (abfd)->e_flags);
5923
5924 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
5925 fprintf (file, _(" [abiv%ld]"),
5926 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
5927 fputc ('\n', file);
5928 }
5929
5930 return TRUE;
5931 }
5932
5933 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5934 of the code entry point, and its section, which must be in the same
5935 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
5936
5937 static bfd_vma
5938 opd_entry_value (asection *opd_sec,
5939 bfd_vma offset,
5940 asection **code_sec,
5941 bfd_vma *code_off,
5942 bfd_boolean in_code_sec)
5943 {
5944 bfd *opd_bfd = opd_sec->owner;
5945 Elf_Internal_Rela *relocs;
5946 Elf_Internal_Rela *lo, *hi, *look;
5947 bfd_vma val;
5948
5949 /* No relocs implies we are linking a --just-symbols object, or looking
5950 at a final linked executable with addr2line or somesuch. */
5951 if (opd_sec->reloc_count == 0)
5952 {
5953 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
5954
5955 if (contents == NULL)
5956 {
5957 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
5958 return (bfd_vma) -1;
5959 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
5960 }
5961
5962 /* PR 17512: file: 64b9dfbb. */
5963 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
5964 return (bfd_vma) -1;
5965
5966 val = bfd_get_64 (opd_bfd, contents + offset);
5967 if (code_sec != NULL)
5968 {
5969 asection *sec, *likely = NULL;
5970
5971 if (in_code_sec)
5972 {
5973 sec = *code_sec;
5974 if (sec->vma <= val
5975 && val < sec->vma + sec->size)
5976 likely = sec;
5977 else
5978 val = -1;
5979 }
5980 else
5981 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5982 if (sec->vma <= val
5983 && (sec->flags & SEC_LOAD) != 0
5984 && (sec->flags & SEC_ALLOC) != 0)
5985 likely = sec;
5986 if (likely != NULL)
5987 {
5988 *code_sec = likely;
5989 if (code_off != NULL)
5990 *code_off = val - likely->vma;
5991 }
5992 }
5993 return val;
5994 }
5995
5996 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5997
5998 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5999 if (relocs == NULL)
6000 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6001 /* PR 17512: file: df8e1fd6. */
6002 if (relocs == NULL)
6003 return (bfd_vma) -1;
6004
6005 /* Go find the opd reloc at the sym address. */
6006 lo = relocs;
6007 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6008 val = (bfd_vma) -1;
6009 while (lo < hi)
6010 {
6011 look = lo + (hi - lo) / 2;
6012 if (look->r_offset < offset)
6013 lo = look + 1;
6014 else if (look->r_offset > offset)
6015 hi = look;
6016 else
6017 {
6018 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6019
6020 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6021 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6022 {
6023 unsigned long symndx = ELF64_R_SYM (look->r_info);
6024 asection *sec = NULL;
6025
6026 if (symndx >= symtab_hdr->sh_info
6027 && elf_sym_hashes (opd_bfd) != NULL)
6028 {
6029 struct elf_link_hash_entry **sym_hashes;
6030 struct elf_link_hash_entry *rh;
6031
6032 sym_hashes = elf_sym_hashes (opd_bfd);
6033 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6034 if (rh != NULL)
6035 {
6036 rh = elf_follow_link (rh);
6037 if (rh->root.type != bfd_link_hash_defined
6038 && rh->root.type != bfd_link_hash_defweak)
6039 break;
6040 if (rh->root.u.def.section->owner == opd_bfd)
6041 {
6042 val = rh->root.u.def.value;
6043 sec = rh->root.u.def.section;
6044 }
6045 }
6046 }
6047
6048 if (sec == NULL)
6049 {
6050 Elf_Internal_Sym *sym;
6051
6052 if (symndx < symtab_hdr->sh_info)
6053 {
6054 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6055 if (sym == NULL)
6056 {
6057 size_t symcnt = symtab_hdr->sh_info;
6058 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6059 symcnt, 0,
6060 NULL, NULL, NULL);
6061 if (sym == NULL)
6062 break;
6063 symtab_hdr->contents = (bfd_byte *) sym;
6064 }
6065 sym += symndx;
6066 }
6067 else
6068 {
6069 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6070 1, symndx,
6071 NULL, NULL, NULL);
6072 if (sym == NULL)
6073 break;
6074 }
6075 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6076 if (sec == NULL)
6077 break;
6078 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6079 val = sym->st_value;
6080 }
6081
6082 val += look->r_addend;
6083 if (code_off != NULL)
6084 *code_off = val;
6085 if (code_sec != NULL)
6086 {
6087 if (in_code_sec && *code_sec != sec)
6088 return -1;
6089 else
6090 *code_sec = sec;
6091 }
6092 if (sec->output_section != NULL)
6093 val += sec->output_section->vma + sec->output_offset;
6094 }
6095 break;
6096 }
6097 }
6098
6099 return val;
6100 }
6101
6102 /* If the ELF symbol SYM might be a function in SEC, return the
6103 function size and set *CODE_OFF to the function's entry point,
6104 otherwise return zero. */
6105
6106 static bfd_size_type
6107 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6108 bfd_vma *code_off)
6109 {
6110 bfd_size_type size;
6111
6112 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6113 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6114 return 0;
6115
6116 size = 0;
6117 if (!(sym->flags & BSF_SYNTHETIC))
6118 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6119
6120 if (strcmp (sym->section->name, ".opd") == 0)
6121 {
6122 if (opd_entry_value (sym->section, sym->value,
6123 &sec, code_off, TRUE) == (bfd_vma) -1)
6124 return 0;
6125 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6126 symbol. This size has nothing to do with the code size of the
6127 function, which is what we're supposed to return, but the
6128 code size isn't available without looking up the dot-sym.
6129 However, doing that would be a waste of time particularly
6130 since elf_find_function will look at the dot-sym anyway.
6131 Now, elf_find_function will keep the largest size of any
6132 function sym found at the code address of interest, so return
6133 1 here to avoid it incorrectly caching a larger function size
6134 for a small function. This does mean we return the wrong
6135 size for a new-ABI function of size 24, but all that does is
6136 disable caching for such functions. */
6137 if (size == 24)
6138 size = 1;
6139 }
6140 else
6141 {
6142 if (sym->section != sec)
6143 return 0;
6144 *code_off = sym->value;
6145 }
6146 if (size == 0)
6147 size = 1;
6148 return size;
6149 }
6150
6151 /* Return true if symbol is defined in a regular object file. */
6152
6153 static bfd_boolean
6154 is_static_defined (struct elf_link_hash_entry *h)
6155 {
6156 return ((h->root.type == bfd_link_hash_defined
6157 || h->root.type == bfd_link_hash_defweak)
6158 && h->root.u.def.section != NULL
6159 && h->root.u.def.section->output_section != NULL);
6160 }
6161
6162 /* If FDH is a function descriptor symbol, return the associated code
6163 entry symbol if it is defined. Return NULL otherwise. */
6164
6165 static struct ppc_link_hash_entry *
6166 defined_code_entry (struct ppc_link_hash_entry *fdh)
6167 {
6168 if (fdh->is_func_descriptor)
6169 {
6170 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6171 if (fh->elf.root.type == bfd_link_hash_defined
6172 || fh->elf.root.type == bfd_link_hash_defweak)
6173 return fh;
6174 }
6175 return NULL;
6176 }
6177
6178 /* If FH is a function code entry symbol, return the associated
6179 function descriptor symbol if it is defined. Return NULL otherwise. */
6180
6181 static struct ppc_link_hash_entry *
6182 defined_func_desc (struct ppc_link_hash_entry *fh)
6183 {
6184 if (fh->oh != NULL
6185 && fh->oh->is_func_descriptor)
6186 {
6187 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6188 if (fdh->elf.root.type == bfd_link_hash_defined
6189 || fdh->elf.root.type == bfd_link_hash_defweak)
6190 return fdh;
6191 }
6192 return NULL;
6193 }
6194
6195 /* Mark all our entry sym sections, both opd and code section. */
6196
6197 static void
6198 ppc64_elf_gc_keep (struct bfd_link_info *info)
6199 {
6200 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6201 struct bfd_sym_chain *sym;
6202
6203 if (htab == NULL)
6204 return;
6205
6206 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6207 {
6208 struct ppc_link_hash_entry *eh, *fh;
6209 asection *sec;
6210
6211 eh = (struct ppc_link_hash_entry *)
6212 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6213 if (eh == NULL)
6214 continue;
6215 if (eh->elf.root.type != bfd_link_hash_defined
6216 && eh->elf.root.type != bfd_link_hash_defweak)
6217 continue;
6218
6219 fh = defined_code_entry (eh);
6220 if (fh != NULL)
6221 {
6222 sec = fh->elf.root.u.def.section;
6223 sec->flags |= SEC_KEEP;
6224 }
6225 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6226 && opd_entry_value (eh->elf.root.u.def.section,
6227 eh->elf.root.u.def.value,
6228 &sec, NULL, FALSE) != (bfd_vma) -1)
6229 sec->flags |= SEC_KEEP;
6230
6231 sec = eh->elf.root.u.def.section;
6232 sec->flags |= SEC_KEEP;
6233 }
6234 }
6235
6236 /* Mark sections containing dynamically referenced symbols. When
6237 building shared libraries, we must assume that any visible symbol is
6238 referenced. */
6239
6240 static bfd_boolean
6241 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6242 {
6243 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6244 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6245 struct ppc_link_hash_entry *fdh;
6246 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6247
6248 /* Dynamic linking info is on the func descriptor sym. */
6249 fdh = defined_func_desc (eh);
6250 if (fdh != NULL)
6251 eh = fdh;
6252
6253 if ((eh->elf.root.type == bfd_link_hash_defined
6254 || eh->elf.root.type == bfd_link_hash_defweak)
6255 && (eh->elf.ref_dynamic
6256 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6257 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6258 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6259 && (!bfd_link_executable (info)
6260 || info->export_dynamic
6261 || (eh->elf.dynamic
6262 && d != NULL
6263 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6264 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6265 || !bfd_hide_sym_by_version (info->version_info,
6266 eh->elf.root.root.string)))))
6267 {
6268 asection *code_sec;
6269 struct ppc_link_hash_entry *fh;
6270
6271 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6272
6273 /* Function descriptor syms cause the associated
6274 function code sym section to be marked. */
6275 fh = defined_code_entry (eh);
6276 if (fh != NULL)
6277 {
6278 code_sec = fh->elf.root.u.def.section;
6279 code_sec->flags |= SEC_KEEP;
6280 }
6281 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6282 && opd_entry_value (eh->elf.root.u.def.section,
6283 eh->elf.root.u.def.value,
6284 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6285 code_sec->flags |= SEC_KEEP;
6286 }
6287
6288 return TRUE;
6289 }
6290
6291 /* Return the section that should be marked against GC for a given
6292 relocation. */
6293
6294 static asection *
6295 ppc64_elf_gc_mark_hook (asection *sec,
6296 struct bfd_link_info *info,
6297 Elf_Internal_Rela *rel,
6298 struct elf_link_hash_entry *h,
6299 Elf_Internal_Sym *sym)
6300 {
6301 asection *rsec;
6302
6303 /* Syms return NULL if we're marking .opd, so we avoid marking all
6304 function sections, as all functions are referenced in .opd. */
6305 rsec = NULL;
6306 if (get_opd_info (sec) != NULL)
6307 return rsec;
6308
6309 if (h != NULL)
6310 {
6311 enum elf_ppc64_reloc_type r_type;
6312 struct ppc_link_hash_entry *eh, *fh, *fdh;
6313
6314 r_type = ELF64_R_TYPE (rel->r_info);
6315 switch (r_type)
6316 {
6317 case R_PPC64_GNU_VTINHERIT:
6318 case R_PPC64_GNU_VTENTRY:
6319 break;
6320
6321 default:
6322 switch (h->root.type)
6323 {
6324 case bfd_link_hash_defined:
6325 case bfd_link_hash_defweak:
6326 eh = (struct ppc_link_hash_entry *) h;
6327 fdh = defined_func_desc (eh);
6328 if (fdh != NULL)
6329 eh = fdh;
6330
6331 /* Function descriptor syms cause the associated
6332 function code sym section to be marked. */
6333 fh = defined_code_entry (eh);
6334 if (fh != NULL)
6335 {
6336 /* They also mark their opd section. */
6337 eh->elf.root.u.def.section->gc_mark = 1;
6338
6339 rsec = fh->elf.root.u.def.section;
6340 }
6341 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6342 && opd_entry_value (eh->elf.root.u.def.section,
6343 eh->elf.root.u.def.value,
6344 &rsec, NULL, FALSE) != (bfd_vma) -1)
6345 eh->elf.root.u.def.section->gc_mark = 1;
6346 else
6347 rsec = h->root.u.def.section;
6348 break;
6349
6350 case bfd_link_hash_common:
6351 rsec = h->root.u.c.p->section;
6352 break;
6353
6354 default:
6355 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6356 }
6357 }
6358 }
6359 else
6360 {
6361 struct _opd_sec_data *opd;
6362
6363 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6364 opd = get_opd_info (rsec);
6365 if (opd != NULL && opd->func_sec != NULL)
6366 {
6367 rsec->gc_mark = 1;
6368
6369 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6370 }
6371 }
6372
6373 return rsec;
6374 }
6375
6376 /* Update the .got, .plt. and dynamic reloc reference counts for the
6377 section being removed. */
6378
6379 static bfd_boolean
6380 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6381 asection *sec, const Elf_Internal_Rela *relocs)
6382 {
6383 struct ppc_link_hash_table *htab;
6384 Elf_Internal_Shdr *symtab_hdr;
6385 struct elf_link_hash_entry **sym_hashes;
6386 struct got_entry **local_got_ents;
6387 const Elf_Internal_Rela *rel, *relend;
6388
6389 if (bfd_link_relocatable (info))
6390 return TRUE;
6391
6392 if ((sec->flags & SEC_ALLOC) == 0)
6393 return TRUE;
6394
6395 elf_section_data (sec)->local_dynrel = NULL;
6396
6397 htab = ppc_hash_table (info);
6398 if (htab == NULL)
6399 return FALSE;
6400
6401 symtab_hdr = &elf_symtab_hdr (abfd);
6402 sym_hashes = elf_sym_hashes (abfd);
6403 local_got_ents = elf_local_got_ents (abfd);
6404
6405 relend = relocs + sec->reloc_count;
6406 for (rel = relocs; rel < relend; rel++)
6407 {
6408 unsigned long r_symndx;
6409 enum elf_ppc64_reloc_type r_type;
6410 struct elf_link_hash_entry *h = NULL;
6411 unsigned char tls_type = 0;
6412
6413 r_symndx = ELF64_R_SYM (rel->r_info);
6414 r_type = ELF64_R_TYPE (rel->r_info);
6415 if (r_symndx >= symtab_hdr->sh_info)
6416 {
6417 struct ppc_link_hash_entry *eh;
6418 struct elf_dyn_relocs **pp;
6419 struct elf_dyn_relocs *p;
6420
6421 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6422 h = elf_follow_link (h);
6423 eh = (struct ppc_link_hash_entry *) h;
6424
6425 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6426 if (p->sec == sec)
6427 {
6428 /* Everything must go for SEC. */
6429 *pp = p->next;
6430 break;
6431 }
6432 }
6433
6434 if (is_branch_reloc (r_type))
6435 {
6436 struct plt_entry **ifunc = NULL;
6437 if (h != NULL)
6438 {
6439 if (h->type == STT_GNU_IFUNC)
6440 ifunc = &h->plt.plist;
6441 }
6442 else if (local_got_ents != NULL)
6443 {
6444 struct plt_entry **local_plt = (struct plt_entry **)
6445 (local_got_ents + symtab_hdr->sh_info);
6446 unsigned char *local_got_tls_masks = (unsigned char *)
6447 (local_plt + symtab_hdr->sh_info);
6448 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6449 ifunc = local_plt + r_symndx;
6450 }
6451 if (ifunc != NULL)
6452 {
6453 struct plt_entry *ent;
6454
6455 for (ent = *ifunc; ent != NULL; ent = ent->next)
6456 if (ent->addend == rel->r_addend)
6457 break;
6458 if (ent == NULL)
6459 abort ();
6460 if (ent->plt.refcount > 0)
6461 ent->plt.refcount -= 1;
6462 continue;
6463 }
6464 }
6465
6466 switch (r_type)
6467 {
6468 case R_PPC64_GOT_TLSLD16:
6469 case R_PPC64_GOT_TLSLD16_LO:
6470 case R_PPC64_GOT_TLSLD16_HI:
6471 case R_PPC64_GOT_TLSLD16_HA:
6472 tls_type = TLS_TLS | TLS_LD;
6473 goto dogot;
6474
6475 case R_PPC64_GOT_TLSGD16:
6476 case R_PPC64_GOT_TLSGD16_LO:
6477 case R_PPC64_GOT_TLSGD16_HI:
6478 case R_PPC64_GOT_TLSGD16_HA:
6479 tls_type = TLS_TLS | TLS_GD;
6480 goto dogot;
6481
6482 case R_PPC64_GOT_TPREL16_DS:
6483 case R_PPC64_GOT_TPREL16_LO_DS:
6484 case R_PPC64_GOT_TPREL16_HI:
6485 case R_PPC64_GOT_TPREL16_HA:
6486 tls_type = TLS_TLS | TLS_TPREL;
6487 goto dogot;
6488
6489 case R_PPC64_GOT_DTPREL16_DS:
6490 case R_PPC64_GOT_DTPREL16_LO_DS:
6491 case R_PPC64_GOT_DTPREL16_HI:
6492 case R_PPC64_GOT_DTPREL16_HA:
6493 tls_type = TLS_TLS | TLS_DTPREL;
6494 goto dogot;
6495
6496 case R_PPC64_GOT16:
6497 case R_PPC64_GOT16_DS:
6498 case R_PPC64_GOT16_HA:
6499 case R_PPC64_GOT16_HI:
6500 case R_PPC64_GOT16_LO:
6501 case R_PPC64_GOT16_LO_DS:
6502 dogot:
6503 {
6504 struct got_entry *ent;
6505
6506 if (h != NULL)
6507 ent = h->got.glist;
6508 else
6509 ent = local_got_ents[r_symndx];
6510
6511 for (; ent != NULL; ent = ent->next)
6512 if (ent->addend == rel->r_addend
6513 && ent->owner == abfd
6514 && ent->tls_type == tls_type)
6515 break;
6516 if (ent == NULL)
6517 abort ();
6518 if (ent->got.refcount > 0)
6519 ent->got.refcount -= 1;
6520 }
6521 break;
6522
6523 case R_PPC64_PLT16_HA:
6524 case R_PPC64_PLT16_HI:
6525 case R_PPC64_PLT16_LO:
6526 case R_PPC64_PLT32:
6527 case R_PPC64_PLT64:
6528 case R_PPC64_REL14:
6529 case R_PPC64_REL14_BRNTAKEN:
6530 case R_PPC64_REL14_BRTAKEN:
6531 case R_PPC64_REL24:
6532 if (h != NULL)
6533 {
6534 struct plt_entry *ent;
6535
6536 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6537 if (ent->addend == rel->r_addend)
6538 break;
6539 if (ent != NULL && ent->plt.refcount > 0)
6540 ent->plt.refcount -= 1;
6541 }
6542 break;
6543
6544 default:
6545 break;
6546 }
6547 }
6548 return TRUE;
6549 }
6550
6551 /* The maximum size of .sfpr. */
6552 #define SFPR_MAX (218*4)
6553
6554 struct sfpr_def_parms
6555 {
6556 const char name[12];
6557 unsigned char lo, hi;
6558 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6559 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6560 };
6561
6562 /* Auto-generate _save*, _rest* functions in .sfpr. */
6563
6564 static bfd_boolean
6565 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6566 {
6567 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6568 unsigned int i;
6569 size_t len = strlen (parm->name);
6570 bfd_boolean writing = FALSE;
6571 char sym[16];
6572
6573 if (htab == NULL)
6574 return FALSE;
6575
6576 memcpy (sym, parm->name, len);
6577 sym[len + 2] = 0;
6578
6579 for (i = parm->lo; i <= parm->hi; i++)
6580 {
6581 struct elf_link_hash_entry *h;
6582
6583 sym[len + 0] = i / 10 + '0';
6584 sym[len + 1] = i % 10 + '0';
6585 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6586 if (h != NULL
6587 && !h->def_regular)
6588 {
6589 h->root.type = bfd_link_hash_defined;
6590 h->root.u.def.section = htab->sfpr;
6591 h->root.u.def.value = htab->sfpr->size;
6592 h->type = STT_FUNC;
6593 h->def_regular = 1;
6594 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6595 writing = TRUE;
6596 if (htab->sfpr->contents == NULL)
6597 {
6598 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6599 if (htab->sfpr->contents == NULL)
6600 return FALSE;
6601 }
6602 }
6603 if (writing)
6604 {
6605 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6606 if (i != parm->hi)
6607 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6608 else
6609 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6610 htab->sfpr->size = p - htab->sfpr->contents;
6611 }
6612 }
6613
6614 return TRUE;
6615 }
6616
6617 static bfd_byte *
6618 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6619 {
6620 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6621 return p + 4;
6622 }
6623
6624 static bfd_byte *
6625 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6626 {
6627 p = savegpr0 (abfd, p, r);
6628 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6629 p = p + 4;
6630 bfd_put_32 (abfd, BLR, p);
6631 return p + 4;
6632 }
6633
6634 static bfd_byte *
6635 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6636 {
6637 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6638 return p + 4;
6639 }
6640
6641 static bfd_byte *
6642 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6643 {
6644 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6645 p = p + 4;
6646 p = restgpr0 (abfd, p, r);
6647 bfd_put_32 (abfd, MTLR_R0, p);
6648 p = p + 4;
6649 if (r == 29)
6650 {
6651 p = restgpr0 (abfd, p, 30);
6652 p = restgpr0 (abfd, p, 31);
6653 }
6654 bfd_put_32 (abfd, BLR, p);
6655 return p + 4;
6656 }
6657
6658 static bfd_byte *
6659 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6660 {
6661 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6662 return p + 4;
6663 }
6664
6665 static bfd_byte *
6666 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6667 {
6668 p = savegpr1 (abfd, p, r);
6669 bfd_put_32 (abfd, BLR, p);
6670 return p + 4;
6671 }
6672
6673 static bfd_byte *
6674 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6675 {
6676 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6677 return p + 4;
6678 }
6679
6680 static bfd_byte *
6681 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6682 {
6683 p = restgpr1 (abfd, p, r);
6684 bfd_put_32 (abfd, BLR, p);
6685 return p + 4;
6686 }
6687
6688 static bfd_byte *
6689 savefpr (bfd *abfd, bfd_byte *p, int r)
6690 {
6691 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6692 return p + 4;
6693 }
6694
6695 static bfd_byte *
6696 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6697 {
6698 p = savefpr (abfd, p, r);
6699 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6700 p = p + 4;
6701 bfd_put_32 (abfd, BLR, p);
6702 return p + 4;
6703 }
6704
6705 static bfd_byte *
6706 restfpr (bfd *abfd, bfd_byte *p, int r)
6707 {
6708 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6709 return p + 4;
6710 }
6711
6712 static bfd_byte *
6713 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6714 {
6715 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6716 p = p + 4;
6717 p = restfpr (abfd, p, r);
6718 bfd_put_32 (abfd, MTLR_R0, p);
6719 p = p + 4;
6720 if (r == 29)
6721 {
6722 p = restfpr (abfd, p, 30);
6723 p = restfpr (abfd, p, 31);
6724 }
6725 bfd_put_32 (abfd, BLR, p);
6726 return p + 4;
6727 }
6728
6729 static bfd_byte *
6730 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6731 {
6732 p = savefpr (abfd, p, r);
6733 bfd_put_32 (abfd, BLR, p);
6734 return p + 4;
6735 }
6736
6737 static bfd_byte *
6738 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6739 {
6740 p = restfpr (abfd, p, r);
6741 bfd_put_32 (abfd, BLR, p);
6742 return p + 4;
6743 }
6744
6745 static bfd_byte *
6746 savevr (bfd *abfd, bfd_byte *p, int r)
6747 {
6748 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6749 p = p + 4;
6750 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6751 return p + 4;
6752 }
6753
6754 static bfd_byte *
6755 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6756 {
6757 p = savevr (abfd, p, r);
6758 bfd_put_32 (abfd, BLR, p);
6759 return p + 4;
6760 }
6761
6762 static bfd_byte *
6763 restvr (bfd *abfd, bfd_byte *p, int r)
6764 {
6765 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6766 p = p + 4;
6767 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6768 return p + 4;
6769 }
6770
6771 static bfd_byte *
6772 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6773 {
6774 p = restvr (abfd, p, r);
6775 bfd_put_32 (abfd, BLR, p);
6776 return p + 4;
6777 }
6778
6779 /* Called via elf_link_hash_traverse to transfer dynamic linking
6780 information on function code symbol entries to their corresponding
6781 function descriptor symbol entries. */
6782
6783 static bfd_boolean
6784 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6785 {
6786 struct bfd_link_info *info;
6787 struct ppc_link_hash_table *htab;
6788 struct plt_entry *ent;
6789 struct ppc_link_hash_entry *fh;
6790 struct ppc_link_hash_entry *fdh;
6791 bfd_boolean force_local;
6792
6793 fh = (struct ppc_link_hash_entry *) h;
6794 if (fh->elf.root.type == bfd_link_hash_indirect)
6795 return TRUE;
6796
6797 info = inf;
6798 htab = ppc_hash_table (info);
6799 if (htab == NULL)
6800 return FALSE;
6801
6802 /* Resolve undefined references to dot-symbols as the value
6803 in the function descriptor, if we have one in a regular object.
6804 This is to satisfy cases like ".quad .foo". Calls to functions
6805 in dynamic objects are handled elsewhere. */
6806 if (fh->elf.root.type == bfd_link_hash_undefweak
6807 && fh->was_undefined
6808 && (fdh = defined_func_desc (fh)) != NULL
6809 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6810 && opd_entry_value (fdh->elf.root.u.def.section,
6811 fdh->elf.root.u.def.value,
6812 &fh->elf.root.u.def.section,
6813 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6814 {
6815 fh->elf.root.type = fdh->elf.root.type;
6816 fh->elf.forced_local = 1;
6817 fh->elf.def_regular = fdh->elf.def_regular;
6818 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6819 }
6820
6821 /* If this is a function code symbol, transfer dynamic linking
6822 information to the function descriptor symbol. */
6823 if (!fh->is_func)
6824 return TRUE;
6825
6826 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6827 if (ent->plt.refcount > 0)
6828 break;
6829 if (ent == NULL
6830 || fh->elf.root.root.string[0] != '.'
6831 || fh->elf.root.root.string[1] == '\0')
6832 return TRUE;
6833
6834 /* Find the corresponding function descriptor symbol. Create it
6835 as undefined if necessary. */
6836
6837 fdh = lookup_fdh (fh, htab);
6838 if (fdh == NULL
6839 && !bfd_link_executable (info)
6840 && (fh->elf.root.type == bfd_link_hash_undefined
6841 || fh->elf.root.type == bfd_link_hash_undefweak))
6842 {
6843 fdh = make_fdh (info, fh);
6844 if (fdh == NULL)
6845 return FALSE;
6846 }
6847
6848 /* Fake function descriptors are made undefweak. If the function
6849 code symbol is strong undefined, make the fake sym the same.
6850 If the function code symbol is defined, then force the fake
6851 descriptor local; We can't support overriding of symbols in a
6852 shared library on a fake descriptor. */
6853
6854 if (fdh != NULL
6855 && fdh->fake
6856 && fdh->elf.root.type == bfd_link_hash_undefweak)
6857 {
6858 if (fh->elf.root.type == bfd_link_hash_undefined)
6859 {
6860 fdh->elf.root.type = bfd_link_hash_undefined;
6861 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6862 }
6863 else if (fh->elf.root.type == bfd_link_hash_defined
6864 || fh->elf.root.type == bfd_link_hash_defweak)
6865 {
6866 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6867 }
6868 }
6869
6870 if (fdh != NULL
6871 && !fdh->elf.forced_local
6872 && (!bfd_link_executable (info)
6873 || fdh->elf.def_dynamic
6874 || fdh->elf.ref_dynamic
6875 || (fdh->elf.root.type == bfd_link_hash_undefweak
6876 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6877 {
6878 if (fdh->elf.dynindx == -1)
6879 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6880 return FALSE;
6881 fdh->elf.ref_regular |= fh->elf.ref_regular;
6882 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6883 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6884 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6885 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6886 {
6887 move_plt_plist (fh, fdh);
6888 fdh->elf.needs_plt = 1;
6889 }
6890 fdh->is_func_descriptor = 1;
6891 fdh->oh = fh;
6892 fh->oh = fdh;
6893 }
6894
6895 /* Now that the info is on the function descriptor, clear the
6896 function code sym info. Any function code syms for which we
6897 don't have a definition in a regular file, we force local.
6898 This prevents a shared library from exporting syms that have
6899 been imported from another library. Function code syms that
6900 are really in the library we must leave global to prevent the
6901 linker dragging in a definition from a static library. */
6902 force_local = (!fh->elf.def_regular
6903 || fdh == NULL
6904 || !fdh->elf.def_regular
6905 || fdh->elf.forced_local);
6906 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6907
6908 return TRUE;
6909 }
6910
6911 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6912 this hook to a) provide some gcc support functions, and b) transfer
6913 dynamic linking information gathered so far on function code symbol
6914 entries, to their corresponding function descriptor symbol entries. */
6915
6916 static bfd_boolean
6917 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6918 struct bfd_link_info *info)
6919 {
6920 struct ppc_link_hash_table *htab;
6921 unsigned int i;
6922 static const struct sfpr_def_parms funcs[] =
6923 {
6924 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6925 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6926 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6927 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6928 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6929 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6930 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6931 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6932 { "._savef", 14, 31, savefpr, savefpr1_tail },
6933 { "._restf", 14, 31, restfpr, restfpr1_tail },
6934 { "_savevr_", 20, 31, savevr, savevr_tail },
6935 { "_restvr_", 20, 31, restvr, restvr_tail }
6936 };
6937
6938 htab = ppc_hash_table (info);
6939 if (htab == NULL)
6940 return FALSE;
6941
6942 if (!bfd_link_relocatable (info)
6943 && htab->elf.hgot != NULL)
6944 {
6945 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6946 /* Make .TOC. defined so as to prevent it being made dynamic.
6947 The wrong value here is fixed later in ppc64_elf_set_toc. */
6948 if (!htab->elf.hgot->def_regular
6949 || htab->elf.hgot->root.type != bfd_link_hash_defined)
6950 {
6951 htab->elf.hgot->root.type = bfd_link_hash_defined;
6952 htab->elf.hgot->root.u.def.value = 0;
6953 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
6954 htab->elf.hgot->def_regular = 1;
6955 htab->elf.hgot->root.linker_def = 1;
6956 }
6957 htab->elf.hgot->type = STT_OBJECT;
6958 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
6959 | STV_HIDDEN);
6960 }
6961
6962 if (htab->sfpr == NULL)
6963 /* We don't have any relocs. */
6964 return TRUE;
6965
6966 /* Provide any missing _save* and _rest* functions. */
6967 htab->sfpr->size = 0;
6968 if (htab->params->save_restore_funcs)
6969 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6970 if (!sfpr_define (info, &funcs[i]))
6971 return FALSE;
6972
6973 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6974
6975 if (htab->sfpr->size == 0)
6976 htab->sfpr->flags |= SEC_EXCLUDE;
6977
6978 return TRUE;
6979 }
6980
6981 /* Return true if we have dynamic relocs that apply to read-only sections. */
6982
6983 static bfd_boolean
6984 readonly_dynrelocs (struct elf_link_hash_entry *h)
6985 {
6986 struct ppc_link_hash_entry *eh;
6987 struct elf_dyn_relocs *p;
6988
6989 eh = (struct ppc_link_hash_entry *) h;
6990 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6991 {
6992 asection *s = p->sec->output_section;
6993
6994 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6995 return TRUE;
6996 }
6997 return FALSE;
6998 }
6999
7000 /* Adjust a symbol defined by a dynamic object and referenced by a
7001 regular object. The current definition is in some section of the
7002 dynamic object, but we're not including those sections. We have to
7003 change the definition to something the rest of the link can
7004 understand. */
7005
7006 static bfd_boolean
7007 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7008 struct elf_link_hash_entry *h)
7009 {
7010 struct ppc_link_hash_table *htab;
7011 asection *s;
7012
7013 htab = ppc_hash_table (info);
7014 if (htab == NULL)
7015 return FALSE;
7016
7017 /* Deal with function syms. */
7018 if (h->type == STT_FUNC
7019 || h->type == STT_GNU_IFUNC
7020 || h->needs_plt)
7021 {
7022 /* Clear procedure linkage table information for any symbol that
7023 won't need a .plt entry. */
7024 struct plt_entry *ent;
7025 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7026 if (ent->plt.refcount > 0)
7027 break;
7028 if (ent == NULL
7029 || (h->type != STT_GNU_IFUNC
7030 && (SYMBOL_CALLS_LOCAL (info, h)
7031 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7032 && h->root.type == bfd_link_hash_undefweak))))
7033 {
7034 h->plt.plist = NULL;
7035 h->needs_plt = 0;
7036 h->pointer_equality_needed = 0;
7037 }
7038 else if (abiversion (info->output_bfd) == 2)
7039 {
7040 /* Taking a function's address in a read/write section
7041 doesn't require us to define the function symbol in the
7042 executable on a global entry stub. A dynamic reloc can
7043 be used instead. */
7044 if (h->pointer_equality_needed
7045 && h->type != STT_GNU_IFUNC
7046 && !readonly_dynrelocs (h))
7047 {
7048 h->pointer_equality_needed = 0;
7049 h->non_got_ref = 0;
7050 }
7051
7052 /* After adjust_dynamic_symbol, non_got_ref set in the
7053 non-shared case means that we have allocated space in
7054 .dynbss for the symbol and thus dyn_relocs for this
7055 symbol should be discarded.
7056 If we get here we know we are making a PLT entry for this
7057 symbol, and in an executable we'd normally resolve
7058 relocations against this symbol to the PLT entry. Allow
7059 dynamic relocs if the reference is weak, and the dynamic
7060 relocs will not cause text relocation. */
7061 else if (!h->ref_regular_nonweak
7062 && h->non_got_ref
7063 && h->type != STT_GNU_IFUNC
7064 && !readonly_dynrelocs (h))
7065 h->non_got_ref = 0;
7066
7067 /* If making a plt entry, then we don't need copy relocs. */
7068 return TRUE;
7069 }
7070 }
7071 else
7072 h->plt.plist = NULL;
7073
7074 /* If this is a weak symbol, and there is a real definition, the
7075 processor independent code will have arranged for us to see the
7076 real definition first, and we can just use the same value. */
7077 if (h->u.weakdef != NULL)
7078 {
7079 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7080 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7081 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7082 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7083 if (ELIMINATE_COPY_RELOCS)
7084 h->non_got_ref = h->u.weakdef->non_got_ref;
7085 return TRUE;
7086 }
7087
7088 /* If we are creating a shared library, we must presume that the
7089 only references to the symbol are via the global offset table.
7090 For such cases we need not do anything here; the relocations will
7091 be handled correctly by relocate_section. */
7092 if (bfd_link_pic (info))
7093 return TRUE;
7094
7095 /* If there are no references to this symbol that do not use the
7096 GOT, we don't need to generate a copy reloc. */
7097 if (!h->non_got_ref)
7098 return TRUE;
7099
7100 /* Don't generate a copy reloc for symbols defined in the executable. */
7101 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
7102 return TRUE;
7103
7104 /* If -z nocopyreloc was given, don't generate them either. */
7105 if (info->nocopyreloc)
7106 {
7107 h->non_got_ref = 0;
7108 return TRUE;
7109 }
7110
7111 /* If we didn't find any dynamic relocs in read-only sections, then
7112 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7113 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7114 {
7115 h->non_got_ref = 0;
7116 return TRUE;
7117 }
7118
7119 /* Protected variables do not work with .dynbss. The copy in
7120 .dynbss won't be used by the shared library with the protected
7121 definition for the variable. Text relocations are preferable
7122 to an incorrect program. */
7123 if (h->protected_def)
7124 {
7125 h->non_got_ref = 0;
7126 return TRUE;
7127 }
7128
7129 if (h->plt.plist != NULL)
7130 {
7131 /* We should never get here, but unfortunately there are versions
7132 of gcc out there that improperly (for this ABI) put initialized
7133 function pointers, vtable refs and suchlike in read-only
7134 sections. Allow them to proceed, but warn that this might
7135 break at runtime. */
7136 info->callbacks->einfo
7137 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7138 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7139 h->root.root.string);
7140 }
7141
7142 /* This is a reference to a symbol defined by a dynamic object which
7143 is not a function. */
7144
7145 /* We must allocate the symbol in our .dynbss section, which will
7146 become part of the .bss section of the executable. There will be
7147 an entry for this symbol in the .dynsym section. The dynamic
7148 object will contain position independent code, so all references
7149 from the dynamic object to this symbol will go through the global
7150 offset table. The dynamic linker will use the .dynsym entry to
7151 determine the address it must put in the global offset table, so
7152 both the dynamic object and the regular object will refer to the
7153 same memory location for the variable. */
7154
7155 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7156 to copy the initial value out of the dynamic object and into the
7157 runtime process image. We need to remember the offset into the
7158 .rela.bss section we are going to use. */
7159 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7160 {
7161 htab->relbss->size += sizeof (Elf64_External_Rela);
7162 h->needs_copy = 1;
7163 }
7164
7165 s = htab->dynbss;
7166
7167 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7168 }
7169
7170 /* If given a function descriptor symbol, hide both the function code
7171 sym and the descriptor. */
7172 static void
7173 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7174 struct elf_link_hash_entry *h,
7175 bfd_boolean force_local)
7176 {
7177 struct ppc_link_hash_entry *eh;
7178 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7179
7180 eh = (struct ppc_link_hash_entry *) h;
7181 if (eh->is_func_descriptor)
7182 {
7183 struct ppc_link_hash_entry *fh = eh->oh;
7184
7185 if (fh == NULL)
7186 {
7187 const char *p, *q;
7188 struct ppc_link_hash_table *htab;
7189 char save;
7190
7191 /* We aren't supposed to use alloca in BFD because on
7192 systems which do not have alloca the version in libiberty
7193 calls xmalloc, which might cause the program to crash
7194 when it runs out of memory. This function doesn't have a
7195 return status, so there's no way to gracefully return an
7196 error. So cheat. We know that string[-1] can be safely
7197 accessed; It's either a string in an ELF string table,
7198 or allocated in an objalloc structure. */
7199
7200 p = eh->elf.root.root.string - 1;
7201 save = *p;
7202 *(char *) p = '.';
7203 htab = ppc_hash_table (info);
7204 if (htab == NULL)
7205 return;
7206
7207 fh = (struct ppc_link_hash_entry *)
7208 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7209 *(char *) p = save;
7210
7211 /* Unfortunately, if it so happens that the string we were
7212 looking for was allocated immediately before this string,
7213 then we overwrote the string terminator. That's the only
7214 reason the lookup should fail. */
7215 if (fh == NULL)
7216 {
7217 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7218 while (q >= eh->elf.root.root.string && *q == *p)
7219 --q, --p;
7220 if (q < eh->elf.root.root.string && *p == '.')
7221 fh = (struct ppc_link_hash_entry *)
7222 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7223 }
7224 if (fh != NULL)
7225 {
7226 eh->oh = fh;
7227 fh->oh = eh;
7228 }
7229 }
7230 if (fh != NULL)
7231 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7232 }
7233 }
7234
7235 static bfd_boolean
7236 get_sym_h (struct elf_link_hash_entry **hp,
7237 Elf_Internal_Sym **symp,
7238 asection **symsecp,
7239 unsigned char **tls_maskp,
7240 Elf_Internal_Sym **locsymsp,
7241 unsigned long r_symndx,
7242 bfd *ibfd)
7243 {
7244 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7245
7246 if (r_symndx >= symtab_hdr->sh_info)
7247 {
7248 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7249 struct elf_link_hash_entry *h;
7250
7251 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7252 h = elf_follow_link (h);
7253
7254 if (hp != NULL)
7255 *hp = h;
7256
7257 if (symp != NULL)
7258 *symp = NULL;
7259
7260 if (symsecp != NULL)
7261 {
7262 asection *symsec = NULL;
7263 if (h->root.type == bfd_link_hash_defined
7264 || h->root.type == bfd_link_hash_defweak)
7265 symsec = h->root.u.def.section;
7266 *symsecp = symsec;
7267 }
7268
7269 if (tls_maskp != NULL)
7270 {
7271 struct ppc_link_hash_entry *eh;
7272
7273 eh = (struct ppc_link_hash_entry *) h;
7274 *tls_maskp = &eh->tls_mask;
7275 }
7276 }
7277 else
7278 {
7279 Elf_Internal_Sym *sym;
7280 Elf_Internal_Sym *locsyms = *locsymsp;
7281
7282 if (locsyms == NULL)
7283 {
7284 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7285 if (locsyms == NULL)
7286 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7287 symtab_hdr->sh_info,
7288 0, NULL, NULL, NULL);
7289 if (locsyms == NULL)
7290 return FALSE;
7291 *locsymsp = locsyms;
7292 }
7293 sym = locsyms + r_symndx;
7294
7295 if (hp != NULL)
7296 *hp = NULL;
7297
7298 if (symp != NULL)
7299 *symp = sym;
7300
7301 if (symsecp != NULL)
7302 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7303
7304 if (tls_maskp != NULL)
7305 {
7306 struct got_entry **lgot_ents;
7307 unsigned char *tls_mask;
7308
7309 tls_mask = NULL;
7310 lgot_ents = elf_local_got_ents (ibfd);
7311 if (lgot_ents != NULL)
7312 {
7313 struct plt_entry **local_plt = (struct plt_entry **)
7314 (lgot_ents + symtab_hdr->sh_info);
7315 unsigned char *lgot_masks = (unsigned char *)
7316 (local_plt + symtab_hdr->sh_info);
7317 tls_mask = &lgot_masks[r_symndx];
7318 }
7319 *tls_maskp = tls_mask;
7320 }
7321 }
7322 return TRUE;
7323 }
7324
7325 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7326 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7327 type suitable for optimization, and 1 otherwise. */
7328
7329 static int
7330 get_tls_mask (unsigned char **tls_maskp,
7331 unsigned long *toc_symndx,
7332 bfd_vma *toc_addend,
7333 Elf_Internal_Sym **locsymsp,
7334 const Elf_Internal_Rela *rel,
7335 bfd *ibfd)
7336 {
7337 unsigned long r_symndx;
7338 int next_r;
7339 struct elf_link_hash_entry *h;
7340 Elf_Internal_Sym *sym;
7341 asection *sec;
7342 bfd_vma off;
7343
7344 r_symndx = ELF64_R_SYM (rel->r_info);
7345 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7346 return 0;
7347
7348 if ((*tls_maskp != NULL && **tls_maskp != 0)
7349 || sec == NULL
7350 || ppc64_elf_section_data (sec) == NULL
7351 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7352 return 1;
7353
7354 /* Look inside a TOC section too. */
7355 if (h != NULL)
7356 {
7357 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7358 off = h->root.u.def.value;
7359 }
7360 else
7361 off = sym->st_value;
7362 off += rel->r_addend;
7363 BFD_ASSERT (off % 8 == 0);
7364 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7365 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7366 if (toc_symndx != NULL)
7367 *toc_symndx = r_symndx;
7368 if (toc_addend != NULL)
7369 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7370 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7371 return 0;
7372 if ((h == NULL || is_static_defined (h))
7373 && (next_r == -1 || next_r == -2))
7374 return 1 - next_r;
7375 return 1;
7376 }
7377
7378 /* Find (or create) an entry in the tocsave hash table. */
7379
7380 static struct tocsave_entry *
7381 tocsave_find (struct ppc_link_hash_table *htab,
7382 enum insert_option insert,
7383 Elf_Internal_Sym **local_syms,
7384 const Elf_Internal_Rela *irela,
7385 bfd *ibfd)
7386 {
7387 unsigned long r_indx;
7388 struct elf_link_hash_entry *h;
7389 Elf_Internal_Sym *sym;
7390 struct tocsave_entry ent, *p;
7391 hashval_t hash;
7392 struct tocsave_entry **slot;
7393
7394 r_indx = ELF64_R_SYM (irela->r_info);
7395 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7396 return NULL;
7397 if (ent.sec == NULL || ent.sec->output_section == NULL)
7398 {
7399 (*_bfd_error_handler)
7400 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7401 return NULL;
7402 }
7403
7404 if (h != NULL)
7405 ent.offset = h->root.u.def.value;
7406 else
7407 ent.offset = sym->st_value;
7408 ent.offset += irela->r_addend;
7409
7410 hash = tocsave_htab_hash (&ent);
7411 slot = ((struct tocsave_entry **)
7412 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7413 if (slot == NULL)
7414 return NULL;
7415
7416 if (*slot == NULL)
7417 {
7418 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7419 if (p == NULL)
7420 return NULL;
7421 *p = ent;
7422 *slot = p;
7423 }
7424 return *slot;
7425 }
7426
7427 /* Adjust all global syms defined in opd sections. In gcc generated
7428 code for the old ABI, these will already have been done. */
7429
7430 static bfd_boolean
7431 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7432 {
7433 struct ppc_link_hash_entry *eh;
7434 asection *sym_sec;
7435 struct _opd_sec_data *opd;
7436
7437 if (h->root.type == bfd_link_hash_indirect)
7438 return TRUE;
7439
7440 if (h->root.type != bfd_link_hash_defined
7441 && h->root.type != bfd_link_hash_defweak)
7442 return TRUE;
7443
7444 eh = (struct ppc_link_hash_entry *) h;
7445 if (eh->adjust_done)
7446 return TRUE;
7447
7448 sym_sec = eh->elf.root.u.def.section;
7449 opd = get_opd_info (sym_sec);
7450 if (opd != NULL && opd->adjust != NULL)
7451 {
7452 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7453 if (adjust == -1)
7454 {
7455 /* This entry has been deleted. */
7456 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7457 if (dsec == NULL)
7458 {
7459 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7460 if (discarded_section (dsec))
7461 {
7462 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7463 break;
7464 }
7465 }
7466 eh->elf.root.u.def.value = 0;
7467 eh->elf.root.u.def.section = dsec;
7468 }
7469 else
7470 eh->elf.root.u.def.value += adjust;
7471 eh->adjust_done = 1;
7472 }
7473 return TRUE;
7474 }
7475
7476 /* Handles decrementing dynamic reloc counts for the reloc specified by
7477 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7478 have already been determined. */
7479
7480 static bfd_boolean
7481 dec_dynrel_count (bfd_vma r_info,
7482 asection *sec,
7483 struct bfd_link_info *info,
7484 Elf_Internal_Sym **local_syms,
7485 struct elf_link_hash_entry *h,
7486 Elf_Internal_Sym *sym)
7487 {
7488 enum elf_ppc64_reloc_type r_type;
7489 asection *sym_sec = NULL;
7490
7491 /* Can this reloc be dynamic? This switch, and later tests here
7492 should be kept in sync with the code in check_relocs. */
7493 r_type = ELF64_R_TYPE (r_info);
7494 switch (r_type)
7495 {
7496 default:
7497 return TRUE;
7498
7499 case R_PPC64_TPREL16:
7500 case R_PPC64_TPREL16_LO:
7501 case R_PPC64_TPREL16_HI:
7502 case R_PPC64_TPREL16_HA:
7503 case R_PPC64_TPREL16_DS:
7504 case R_PPC64_TPREL16_LO_DS:
7505 case R_PPC64_TPREL16_HIGH:
7506 case R_PPC64_TPREL16_HIGHA:
7507 case R_PPC64_TPREL16_HIGHER:
7508 case R_PPC64_TPREL16_HIGHERA:
7509 case R_PPC64_TPREL16_HIGHEST:
7510 case R_PPC64_TPREL16_HIGHESTA:
7511 if (!bfd_link_pic (info))
7512 return TRUE;
7513
7514 case R_PPC64_TPREL64:
7515 case R_PPC64_DTPMOD64:
7516 case R_PPC64_DTPREL64:
7517 case R_PPC64_ADDR64:
7518 case R_PPC64_REL30:
7519 case R_PPC64_REL32:
7520 case R_PPC64_REL64:
7521 case R_PPC64_ADDR14:
7522 case R_PPC64_ADDR14_BRNTAKEN:
7523 case R_PPC64_ADDR14_BRTAKEN:
7524 case R_PPC64_ADDR16:
7525 case R_PPC64_ADDR16_DS:
7526 case R_PPC64_ADDR16_HA:
7527 case R_PPC64_ADDR16_HI:
7528 case R_PPC64_ADDR16_HIGH:
7529 case R_PPC64_ADDR16_HIGHA:
7530 case R_PPC64_ADDR16_HIGHER:
7531 case R_PPC64_ADDR16_HIGHERA:
7532 case R_PPC64_ADDR16_HIGHEST:
7533 case R_PPC64_ADDR16_HIGHESTA:
7534 case R_PPC64_ADDR16_LO:
7535 case R_PPC64_ADDR16_LO_DS:
7536 case R_PPC64_ADDR24:
7537 case R_PPC64_ADDR32:
7538 case R_PPC64_UADDR16:
7539 case R_PPC64_UADDR32:
7540 case R_PPC64_UADDR64:
7541 case R_PPC64_TOC:
7542 break;
7543 }
7544
7545 if (local_syms != NULL)
7546 {
7547 unsigned long r_symndx;
7548 bfd *ibfd = sec->owner;
7549
7550 r_symndx = ELF64_R_SYM (r_info);
7551 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7552 return FALSE;
7553 }
7554
7555 if ((bfd_link_pic (info)
7556 && (must_be_dyn_reloc (info, r_type)
7557 || (h != NULL
7558 && (!SYMBOLIC_BIND (info, h)
7559 || h->root.type == bfd_link_hash_defweak
7560 || !h->def_regular))))
7561 || (ELIMINATE_COPY_RELOCS
7562 && !bfd_link_pic (info)
7563 && h != NULL
7564 && (h->root.type == bfd_link_hash_defweak
7565 || !h->def_regular)))
7566 ;
7567 else
7568 return TRUE;
7569
7570 if (h != NULL)
7571 {
7572 struct elf_dyn_relocs *p;
7573 struct elf_dyn_relocs **pp;
7574 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7575
7576 /* elf_gc_sweep may have already removed all dyn relocs associated
7577 with local syms for a given section. Also, symbol flags are
7578 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7579 report a dynreloc miscount. */
7580 if (*pp == NULL && info->gc_sections)
7581 return TRUE;
7582
7583 while ((p = *pp) != NULL)
7584 {
7585 if (p->sec == sec)
7586 {
7587 if (!must_be_dyn_reloc (info, r_type))
7588 p->pc_count -= 1;
7589 p->count -= 1;
7590 if (p->count == 0)
7591 *pp = p->next;
7592 return TRUE;
7593 }
7594 pp = &p->next;
7595 }
7596 }
7597 else
7598 {
7599 struct ppc_dyn_relocs *p;
7600 struct ppc_dyn_relocs **pp;
7601 void *vpp;
7602 bfd_boolean is_ifunc;
7603
7604 if (local_syms == NULL)
7605 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7606 if (sym_sec == NULL)
7607 sym_sec = sec;
7608
7609 vpp = &elf_section_data (sym_sec)->local_dynrel;
7610 pp = (struct ppc_dyn_relocs **) vpp;
7611
7612 if (*pp == NULL && info->gc_sections)
7613 return TRUE;
7614
7615 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7616 while ((p = *pp) != NULL)
7617 {
7618 if (p->sec == sec && p->ifunc == is_ifunc)
7619 {
7620 p->count -= 1;
7621 if (p->count == 0)
7622 *pp = p->next;
7623 return TRUE;
7624 }
7625 pp = &p->next;
7626 }
7627 }
7628
7629 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7630 sec->owner, sec);
7631 bfd_set_error (bfd_error_bad_value);
7632 return FALSE;
7633 }
7634
7635 /* Remove unused Official Procedure Descriptor entries. Currently we
7636 only remove those associated with functions in discarded link-once
7637 sections, or weakly defined functions that have been overridden. It
7638 would be possible to remove many more entries for statically linked
7639 applications. */
7640
7641 bfd_boolean
7642 ppc64_elf_edit_opd (struct bfd_link_info *info)
7643 {
7644 bfd *ibfd;
7645 bfd_boolean some_edited = FALSE;
7646 asection *need_pad = NULL;
7647 struct ppc_link_hash_table *htab;
7648
7649 htab = ppc_hash_table (info);
7650 if (htab == NULL)
7651 return FALSE;
7652
7653 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7654 {
7655 asection *sec;
7656 Elf_Internal_Rela *relstart, *rel, *relend;
7657 Elf_Internal_Shdr *symtab_hdr;
7658 Elf_Internal_Sym *local_syms;
7659 struct _opd_sec_data *opd;
7660 bfd_boolean need_edit, add_aux_fields, broken;
7661 bfd_size_type cnt_16b = 0;
7662
7663 if (!is_ppc64_elf (ibfd))
7664 continue;
7665
7666 sec = bfd_get_section_by_name (ibfd, ".opd");
7667 if (sec == NULL || sec->size == 0)
7668 continue;
7669
7670 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7671 continue;
7672
7673 if (sec->output_section == bfd_abs_section_ptr)
7674 continue;
7675
7676 /* Look through the section relocs. */
7677 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7678 continue;
7679
7680 local_syms = NULL;
7681 symtab_hdr = &elf_symtab_hdr (ibfd);
7682
7683 /* Read the relocations. */
7684 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7685 info->keep_memory);
7686 if (relstart == NULL)
7687 return FALSE;
7688
7689 /* First run through the relocs to check they are sane, and to
7690 determine whether we need to edit this opd section. */
7691 need_edit = FALSE;
7692 broken = FALSE;
7693 need_pad = sec;
7694 relend = relstart + sec->reloc_count;
7695 for (rel = relstart; rel < relend; )
7696 {
7697 enum elf_ppc64_reloc_type r_type;
7698 unsigned long r_symndx;
7699 asection *sym_sec;
7700 struct elf_link_hash_entry *h;
7701 Elf_Internal_Sym *sym;
7702 bfd_vma offset;
7703
7704 /* .opd contains an array of 16 or 24 byte entries. We're
7705 only interested in the reloc pointing to a function entry
7706 point. */
7707 offset = rel->r_offset;
7708 if (rel + 1 == relend
7709 || rel[1].r_offset != offset + 8)
7710 {
7711 /* If someone messes with .opd alignment then after a
7712 "ld -r" we might have padding in the middle of .opd.
7713 Also, there's nothing to prevent someone putting
7714 something silly in .opd with the assembler. No .opd
7715 optimization for them! */
7716 broken_opd:
7717 (*_bfd_error_handler)
7718 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7719 broken = TRUE;
7720 break;
7721 }
7722
7723 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7724 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7725 {
7726 (*_bfd_error_handler)
7727 (_("%B: unexpected reloc type %u in .opd section"),
7728 ibfd, r_type);
7729 broken = TRUE;
7730 break;
7731 }
7732
7733 r_symndx = ELF64_R_SYM (rel->r_info);
7734 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7735 r_symndx, ibfd))
7736 goto error_ret;
7737
7738 if (sym_sec == NULL || sym_sec->owner == NULL)
7739 {
7740 const char *sym_name;
7741 if (h != NULL)
7742 sym_name = h->root.root.string;
7743 else
7744 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7745 sym_sec);
7746
7747 (*_bfd_error_handler)
7748 (_("%B: undefined sym `%s' in .opd section"),
7749 ibfd, sym_name);
7750 broken = TRUE;
7751 break;
7752 }
7753
7754 /* opd entries are always for functions defined in the
7755 current input bfd. If the symbol isn't defined in the
7756 input bfd, then we won't be using the function in this
7757 bfd; It must be defined in a linkonce section in another
7758 bfd, or is weak. It's also possible that we are
7759 discarding the function due to a linker script /DISCARD/,
7760 which we test for via the output_section. */
7761 if (sym_sec->owner != ibfd
7762 || sym_sec->output_section == bfd_abs_section_ptr)
7763 need_edit = TRUE;
7764
7765 rel += 2;
7766 if (rel + 1 == relend
7767 || (rel + 2 < relend
7768 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7769 ++rel;
7770
7771 if (rel == relend)
7772 {
7773 if (sec->size == offset + 24)
7774 {
7775 need_pad = NULL;
7776 break;
7777 }
7778 if (sec->size == offset + 16)
7779 {
7780 cnt_16b++;
7781 break;
7782 }
7783 goto broken_opd;
7784 }
7785 else if (rel + 1 < relend
7786 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7787 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7788 {
7789 if (rel[0].r_offset == offset + 16)
7790 cnt_16b++;
7791 else if (rel[0].r_offset != offset + 24)
7792 goto broken_opd;
7793 }
7794 else
7795 goto broken_opd;
7796 }
7797
7798 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7799
7800 if (!broken && (need_edit || add_aux_fields))
7801 {
7802 Elf_Internal_Rela *write_rel;
7803 Elf_Internal_Shdr *rel_hdr;
7804 bfd_byte *rptr, *wptr;
7805 bfd_byte *new_contents;
7806 bfd_size_type amt;
7807
7808 new_contents = NULL;
7809 amt = OPD_NDX (sec->size) * sizeof (long);
7810 opd = &ppc64_elf_section_data (sec)->u.opd;
7811 opd->adjust = bfd_zalloc (sec->owner, amt);
7812 if (opd->adjust == NULL)
7813 return FALSE;
7814 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7815
7816 /* This seems a waste of time as input .opd sections are all
7817 zeros as generated by gcc, but I suppose there's no reason
7818 this will always be so. We might start putting something in
7819 the third word of .opd entries. */
7820 if ((sec->flags & SEC_IN_MEMORY) == 0)
7821 {
7822 bfd_byte *loc;
7823 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7824 {
7825 if (loc != NULL)
7826 free (loc);
7827 error_ret:
7828 if (local_syms != NULL
7829 && symtab_hdr->contents != (unsigned char *) local_syms)
7830 free (local_syms);
7831 if (elf_section_data (sec)->relocs != relstart)
7832 free (relstart);
7833 return FALSE;
7834 }
7835 sec->contents = loc;
7836 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7837 }
7838
7839 elf_section_data (sec)->relocs = relstart;
7840
7841 new_contents = sec->contents;
7842 if (add_aux_fields)
7843 {
7844 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7845 if (new_contents == NULL)
7846 return FALSE;
7847 need_pad = NULL;
7848 }
7849 wptr = new_contents;
7850 rptr = sec->contents;
7851 write_rel = relstart;
7852 for (rel = relstart; rel < relend; )
7853 {
7854 unsigned long r_symndx;
7855 asection *sym_sec;
7856 struct elf_link_hash_entry *h;
7857 struct ppc_link_hash_entry *fdh = NULL;
7858 Elf_Internal_Sym *sym;
7859 long opd_ent_size;
7860 Elf_Internal_Rela *next_rel;
7861 bfd_boolean skip;
7862
7863 r_symndx = ELF64_R_SYM (rel->r_info);
7864 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7865 r_symndx, ibfd))
7866 goto error_ret;
7867
7868 next_rel = rel + 2;
7869 if (next_rel + 1 == relend
7870 || (next_rel + 2 < relend
7871 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
7872 ++next_rel;
7873
7874 /* See if the .opd entry is full 24 byte or
7875 16 byte (with fd_aux entry overlapped with next
7876 fd_func). */
7877 opd_ent_size = 24;
7878 if (next_rel == relend)
7879 {
7880 if (sec->size == rel->r_offset + 16)
7881 opd_ent_size = 16;
7882 }
7883 else if (next_rel->r_offset == rel->r_offset + 16)
7884 opd_ent_size = 16;
7885
7886 if (h != NULL
7887 && h->root.root.string[0] == '.')
7888 {
7889 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
7890 if (fdh != NULL
7891 && fdh->elf.root.type != bfd_link_hash_defined
7892 && fdh->elf.root.type != bfd_link_hash_defweak)
7893 fdh = NULL;
7894 }
7895
7896 skip = (sym_sec->owner != ibfd
7897 || sym_sec->output_section == bfd_abs_section_ptr);
7898 if (skip)
7899 {
7900 if (fdh != NULL && sym_sec->owner == ibfd)
7901 {
7902 /* Arrange for the function descriptor sym
7903 to be dropped. */
7904 fdh->elf.root.u.def.value = 0;
7905 fdh->elf.root.u.def.section = sym_sec;
7906 }
7907 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
7908
7909 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
7910 rel = next_rel;
7911 else
7912 while (1)
7913 {
7914 if (!dec_dynrel_count (rel->r_info, sec, info,
7915 NULL, h, sym))
7916 goto error_ret;
7917
7918 if (++rel == next_rel)
7919 break;
7920
7921 r_symndx = ELF64_R_SYM (rel->r_info);
7922 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7923 r_symndx, ibfd))
7924 goto error_ret;
7925 }
7926 }
7927 else
7928 {
7929 /* We'll be keeping this opd entry. */
7930 long adjust;
7931
7932 if (fdh != NULL)
7933 {
7934 /* Redefine the function descriptor symbol to
7935 this location in the opd section. It is
7936 necessary to update the value here rather
7937 than using an array of adjustments as we do
7938 for local symbols, because various places
7939 in the generic ELF code use the value
7940 stored in u.def.value. */
7941 fdh->elf.root.u.def.value = wptr - new_contents;
7942 fdh->adjust_done = 1;
7943 }
7944
7945 /* Local syms are a bit tricky. We could
7946 tweak them as they can be cached, but
7947 we'd need to look through the local syms
7948 for the function descriptor sym which we
7949 don't have at the moment. So keep an
7950 array of adjustments. */
7951 adjust = (wptr - new_contents) - (rptr - sec->contents);
7952 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
7953
7954 if (wptr != rptr)
7955 memcpy (wptr, rptr, opd_ent_size);
7956 wptr += opd_ent_size;
7957 if (add_aux_fields && opd_ent_size == 16)
7958 {
7959 memset (wptr, '\0', 8);
7960 wptr += 8;
7961 }
7962
7963 /* We need to adjust any reloc offsets to point to the
7964 new opd entries. */
7965 for ( ; rel != next_rel; ++rel)
7966 {
7967 rel->r_offset += adjust;
7968 if (write_rel != rel)
7969 memcpy (write_rel, rel, sizeof (*rel));
7970 ++write_rel;
7971 }
7972 }
7973
7974 rptr += opd_ent_size;
7975 }
7976
7977 sec->size = wptr - new_contents;
7978 sec->reloc_count = write_rel - relstart;
7979 if (add_aux_fields)
7980 {
7981 free (sec->contents);
7982 sec->contents = new_contents;
7983 }
7984
7985 /* Fudge the header size too, as this is used later in
7986 elf_bfd_final_link if we are emitting relocs. */
7987 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7988 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7989 some_edited = TRUE;
7990 }
7991 else if (elf_section_data (sec)->relocs != relstart)
7992 free (relstart);
7993
7994 if (local_syms != NULL
7995 && symtab_hdr->contents != (unsigned char *) local_syms)
7996 {
7997 if (!info->keep_memory)
7998 free (local_syms);
7999 else
8000 symtab_hdr->contents = (unsigned char *) local_syms;
8001 }
8002 }
8003
8004 if (some_edited)
8005 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8006
8007 /* If we are doing a final link and the last .opd entry is just 16 byte
8008 long, add a 8 byte padding after it. */
8009 if (need_pad != NULL && !bfd_link_relocatable (info))
8010 {
8011 bfd_byte *p;
8012
8013 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8014 {
8015 BFD_ASSERT (need_pad->size > 0);
8016
8017 p = bfd_malloc (need_pad->size + 8);
8018 if (p == NULL)
8019 return FALSE;
8020
8021 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8022 p, 0, need_pad->size))
8023 return FALSE;
8024
8025 need_pad->contents = p;
8026 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8027 }
8028 else
8029 {
8030 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8031 if (p == NULL)
8032 return FALSE;
8033
8034 need_pad->contents = p;
8035 }
8036
8037 memset (need_pad->contents + need_pad->size, 0, 8);
8038 need_pad->size += 8;
8039 }
8040
8041 return TRUE;
8042 }
8043
8044 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8045
8046 asection *
8047 ppc64_elf_tls_setup (struct bfd_link_info *info)
8048 {
8049 struct ppc_link_hash_table *htab;
8050
8051 htab = ppc_hash_table (info);
8052 if (htab == NULL)
8053 return NULL;
8054
8055 if (abiversion (info->output_bfd) == 1)
8056 htab->opd_abi = 1;
8057
8058 if (htab->params->no_multi_toc)
8059 htab->do_multi_toc = 0;
8060 else if (!htab->do_multi_toc)
8061 htab->params->no_multi_toc = 1;
8062
8063 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8064 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8065 FALSE, FALSE, TRUE));
8066 /* Move dynamic linking info to the function descriptor sym. */
8067 if (htab->tls_get_addr != NULL)
8068 func_desc_adjust (&htab->tls_get_addr->elf, info);
8069 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8070 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8071 FALSE, FALSE, TRUE));
8072 if (!htab->params->no_tls_get_addr_opt)
8073 {
8074 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8075
8076 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8077 FALSE, FALSE, TRUE);
8078 if (opt != NULL)
8079 func_desc_adjust (opt, info);
8080 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8081 FALSE, FALSE, TRUE);
8082 if (opt_fd != NULL
8083 && (opt_fd->root.type == bfd_link_hash_defined
8084 || opt_fd->root.type == bfd_link_hash_defweak))
8085 {
8086 /* If glibc supports an optimized __tls_get_addr call stub,
8087 signalled by the presence of __tls_get_addr_opt, and we'll
8088 be calling __tls_get_addr via a plt call stub, then
8089 make __tls_get_addr point to __tls_get_addr_opt. */
8090 tga_fd = &htab->tls_get_addr_fd->elf;
8091 if (htab->elf.dynamic_sections_created
8092 && tga_fd != NULL
8093 && (tga_fd->type == STT_FUNC
8094 || tga_fd->needs_plt)
8095 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8096 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8097 && tga_fd->root.type == bfd_link_hash_undefweak)))
8098 {
8099 struct plt_entry *ent;
8100
8101 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8102 if (ent->plt.refcount > 0)
8103 break;
8104 if (ent != NULL)
8105 {
8106 tga_fd->root.type = bfd_link_hash_indirect;
8107 tga_fd->root.u.i.link = &opt_fd->root;
8108 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8109 if (opt_fd->dynindx != -1)
8110 {
8111 /* Use __tls_get_addr_opt in dynamic relocations. */
8112 opt_fd->dynindx = -1;
8113 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8114 opt_fd->dynstr_index);
8115 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8116 return NULL;
8117 }
8118 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8119 tga = &htab->tls_get_addr->elf;
8120 if (opt != NULL && tga != NULL)
8121 {
8122 tga->root.type = bfd_link_hash_indirect;
8123 tga->root.u.i.link = &opt->root;
8124 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8125 _bfd_elf_link_hash_hide_symbol (info, opt,
8126 tga->forced_local);
8127 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8128 }
8129 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8130 htab->tls_get_addr_fd->is_func_descriptor = 1;
8131 if (htab->tls_get_addr != NULL)
8132 {
8133 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8134 htab->tls_get_addr->is_func = 1;
8135 }
8136 }
8137 }
8138 }
8139 else
8140 htab->params->no_tls_get_addr_opt = TRUE;
8141 }
8142 return _bfd_elf_tls_setup (info->output_bfd, info);
8143 }
8144
8145 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8146 HASH1 or HASH2. */
8147
8148 static bfd_boolean
8149 branch_reloc_hash_match (const bfd *ibfd,
8150 const Elf_Internal_Rela *rel,
8151 const struct ppc_link_hash_entry *hash1,
8152 const struct ppc_link_hash_entry *hash2)
8153 {
8154 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8155 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8156 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8157
8158 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8159 {
8160 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8161 struct elf_link_hash_entry *h;
8162
8163 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8164 h = elf_follow_link (h);
8165 if (h == &hash1->elf || h == &hash2->elf)
8166 return TRUE;
8167 }
8168 return FALSE;
8169 }
8170
8171 /* Run through all the TLS relocs looking for optimization
8172 opportunities. The linker has been hacked (see ppc64elf.em) to do
8173 a preliminary section layout so that we know the TLS segment
8174 offsets. We can't optimize earlier because some optimizations need
8175 to know the tp offset, and we need to optimize before allocating
8176 dynamic relocations. */
8177
8178 bfd_boolean
8179 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8180 {
8181 bfd *ibfd;
8182 asection *sec;
8183 struct ppc_link_hash_table *htab;
8184 unsigned char *toc_ref;
8185 int pass;
8186
8187 if (!bfd_link_executable (info))
8188 return TRUE;
8189
8190 htab = ppc_hash_table (info);
8191 if (htab == NULL)
8192 return FALSE;
8193
8194 /* Make two passes over the relocs. On the first pass, mark toc
8195 entries involved with tls relocs, and check that tls relocs
8196 involved in setting up a tls_get_addr call are indeed followed by
8197 such a call. If they are not, we can't do any tls optimization.
8198 On the second pass twiddle tls_mask flags to notify
8199 relocate_section that optimization can be done, and adjust got
8200 and plt refcounts. */
8201 toc_ref = NULL;
8202 for (pass = 0; pass < 2; ++pass)
8203 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8204 {
8205 Elf_Internal_Sym *locsyms = NULL;
8206 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8207
8208 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8209 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8210 {
8211 Elf_Internal_Rela *relstart, *rel, *relend;
8212 bfd_boolean found_tls_get_addr_arg = 0;
8213
8214 /* Read the relocations. */
8215 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8216 info->keep_memory);
8217 if (relstart == NULL)
8218 {
8219 free (toc_ref);
8220 return FALSE;
8221 }
8222
8223 relend = relstart + sec->reloc_count;
8224 for (rel = relstart; rel < relend; rel++)
8225 {
8226 enum elf_ppc64_reloc_type r_type;
8227 unsigned long r_symndx;
8228 struct elf_link_hash_entry *h;
8229 Elf_Internal_Sym *sym;
8230 asection *sym_sec;
8231 unsigned char *tls_mask;
8232 unsigned char tls_set, tls_clear, tls_type = 0;
8233 bfd_vma value;
8234 bfd_boolean ok_tprel, is_local;
8235 long toc_ref_index = 0;
8236 int expecting_tls_get_addr = 0;
8237 bfd_boolean ret = FALSE;
8238
8239 r_symndx = ELF64_R_SYM (rel->r_info);
8240 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8241 r_symndx, ibfd))
8242 {
8243 err_free_rel:
8244 if (elf_section_data (sec)->relocs != relstart)
8245 free (relstart);
8246 if (toc_ref != NULL)
8247 free (toc_ref);
8248 if (locsyms != NULL
8249 && (elf_symtab_hdr (ibfd).contents
8250 != (unsigned char *) locsyms))
8251 free (locsyms);
8252 return ret;
8253 }
8254
8255 if (h != NULL)
8256 {
8257 if (h->root.type == bfd_link_hash_defined
8258 || h->root.type == bfd_link_hash_defweak)
8259 value = h->root.u.def.value;
8260 else if (h->root.type == bfd_link_hash_undefweak)
8261 value = 0;
8262 else
8263 {
8264 found_tls_get_addr_arg = 0;
8265 continue;
8266 }
8267 }
8268 else
8269 /* Symbols referenced by TLS relocs must be of type
8270 STT_TLS. So no need for .opd local sym adjust. */
8271 value = sym->st_value;
8272
8273 ok_tprel = FALSE;
8274 is_local = FALSE;
8275 if (h == NULL
8276 || !h->def_dynamic)
8277 {
8278 is_local = TRUE;
8279 if (h != NULL
8280 && h->root.type == bfd_link_hash_undefweak)
8281 ok_tprel = TRUE;
8282 else
8283 {
8284 value += sym_sec->output_offset;
8285 value += sym_sec->output_section->vma;
8286 value -= htab->elf.tls_sec->vma;
8287 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8288 < (bfd_vma) 1 << 32);
8289 }
8290 }
8291
8292 r_type = ELF64_R_TYPE (rel->r_info);
8293 /* If this section has old-style __tls_get_addr calls
8294 without marker relocs, then check that each
8295 __tls_get_addr call reloc is preceded by a reloc
8296 that conceivably belongs to the __tls_get_addr arg
8297 setup insn. If we don't find matching arg setup
8298 relocs, don't do any tls optimization. */
8299 if (pass == 0
8300 && sec->has_tls_get_addr_call
8301 && h != NULL
8302 && (h == &htab->tls_get_addr->elf
8303 || h == &htab->tls_get_addr_fd->elf)
8304 && !found_tls_get_addr_arg
8305 && is_branch_reloc (r_type))
8306 {
8307 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8308 "TLS optimization disabled\n"),
8309 ibfd, sec, rel->r_offset);
8310 ret = TRUE;
8311 goto err_free_rel;
8312 }
8313
8314 found_tls_get_addr_arg = 0;
8315 switch (r_type)
8316 {
8317 case R_PPC64_GOT_TLSLD16:
8318 case R_PPC64_GOT_TLSLD16_LO:
8319 expecting_tls_get_addr = 1;
8320 found_tls_get_addr_arg = 1;
8321 /* Fall thru */
8322
8323 case R_PPC64_GOT_TLSLD16_HI:
8324 case R_PPC64_GOT_TLSLD16_HA:
8325 /* These relocs should never be against a symbol
8326 defined in a shared lib. Leave them alone if
8327 that turns out to be the case. */
8328 if (!is_local)
8329 continue;
8330
8331 /* LD -> LE */
8332 tls_set = 0;
8333 tls_clear = TLS_LD;
8334 tls_type = TLS_TLS | TLS_LD;
8335 break;
8336
8337 case R_PPC64_GOT_TLSGD16:
8338 case R_PPC64_GOT_TLSGD16_LO:
8339 expecting_tls_get_addr = 1;
8340 found_tls_get_addr_arg = 1;
8341 /* Fall thru */
8342
8343 case R_PPC64_GOT_TLSGD16_HI:
8344 case R_PPC64_GOT_TLSGD16_HA:
8345 if (ok_tprel)
8346 /* GD -> LE */
8347 tls_set = 0;
8348 else
8349 /* GD -> IE */
8350 tls_set = TLS_TLS | TLS_TPRELGD;
8351 tls_clear = TLS_GD;
8352 tls_type = TLS_TLS | TLS_GD;
8353 break;
8354
8355 case R_PPC64_GOT_TPREL16_DS:
8356 case R_PPC64_GOT_TPREL16_LO_DS:
8357 case R_PPC64_GOT_TPREL16_HI:
8358 case R_PPC64_GOT_TPREL16_HA:
8359 if (ok_tprel)
8360 {
8361 /* IE -> LE */
8362 tls_set = 0;
8363 tls_clear = TLS_TPREL;
8364 tls_type = TLS_TLS | TLS_TPREL;
8365 break;
8366 }
8367 continue;
8368
8369 case R_PPC64_TLSGD:
8370 case R_PPC64_TLSLD:
8371 found_tls_get_addr_arg = 1;
8372 /* Fall thru */
8373
8374 case R_PPC64_TLS:
8375 case R_PPC64_TOC16:
8376 case R_PPC64_TOC16_LO:
8377 if (sym_sec == NULL || sym_sec != toc)
8378 continue;
8379
8380 /* Mark this toc entry as referenced by a TLS
8381 code sequence. We can do that now in the
8382 case of R_PPC64_TLS, and after checking for
8383 tls_get_addr for the TOC16 relocs. */
8384 if (toc_ref == NULL)
8385 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8386 if (toc_ref == NULL)
8387 goto err_free_rel;
8388
8389 if (h != NULL)
8390 value = h->root.u.def.value;
8391 else
8392 value = sym->st_value;
8393 value += rel->r_addend;
8394 if (value % 8 != 0)
8395 continue;
8396 BFD_ASSERT (value < toc->size
8397 && toc->output_offset % 8 == 0);
8398 toc_ref_index = (value + toc->output_offset) / 8;
8399 if (r_type == R_PPC64_TLS
8400 || r_type == R_PPC64_TLSGD
8401 || r_type == R_PPC64_TLSLD)
8402 {
8403 toc_ref[toc_ref_index] = 1;
8404 continue;
8405 }
8406
8407 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8408 continue;
8409
8410 tls_set = 0;
8411 tls_clear = 0;
8412 expecting_tls_get_addr = 2;
8413 break;
8414
8415 case R_PPC64_TPREL64:
8416 if (pass == 0
8417 || sec != toc
8418 || toc_ref == NULL
8419 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8420 continue;
8421 if (ok_tprel)
8422 {
8423 /* IE -> LE */
8424 tls_set = TLS_EXPLICIT;
8425 tls_clear = TLS_TPREL;
8426 break;
8427 }
8428 continue;
8429
8430 case R_PPC64_DTPMOD64:
8431 if (pass == 0
8432 || sec != toc
8433 || toc_ref == NULL
8434 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8435 continue;
8436 if (rel + 1 < relend
8437 && (rel[1].r_info
8438 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8439 && rel[1].r_offset == rel->r_offset + 8)
8440 {
8441 if (ok_tprel)
8442 /* GD -> LE */
8443 tls_set = TLS_EXPLICIT | TLS_GD;
8444 else
8445 /* GD -> IE */
8446 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8447 tls_clear = TLS_GD;
8448 }
8449 else
8450 {
8451 if (!is_local)
8452 continue;
8453
8454 /* LD -> LE */
8455 tls_set = TLS_EXPLICIT;
8456 tls_clear = TLS_LD;
8457 }
8458 break;
8459
8460 default:
8461 continue;
8462 }
8463
8464 if (pass == 0)
8465 {
8466 if (!expecting_tls_get_addr
8467 || !sec->has_tls_get_addr_call)
8468 continue;
8469
8470 if (rel + 1 < relend
8471 && branch_reloc_hash_match (ibfd, rel + 1,
8472 htab->tls_get_addr,
8473 htab->tls_get_addr_fd))
8474 {
8475 if (expecting_tls_get_addr == 2)
8476 {
8477 /* Check for toc tls entries. */
8478 unsigned char *toc_tls;
8479 int retval;
8480
8481 retval = get_tls_mask (&toc_tls, NULL, NULL,
8482 &locsyms,
8483 rel, ibfd);
8484 if (retval == 0)
8485 goto err_free_rel;
8486 if (toc_tls != NULL)
8487 {
8488 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8489 found_tls_get_addr_arg = 1;
8490 if (retval > 1)
8491 toc_ref[toc_ref_index] = 1;
8492 }
8493 }
8494 continue;
8495 }
8496
8497 if (expecting_tls_get_addr != 1)
8498 continue;
8499
8500 /* Uh oh, we didn't find the expected call. We
8501 could just mark this symbol to exclude it
8502 from tls optimization but it's safer to skip
8503 the entire optimization. */
8504 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8505 "TLS optimization disabled\n"),
8506 ibfd, sec, rel->r_offset);
8507 ret = TRUE;
8508 goto err_free_rel;
8509 }
8510
8511 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8512 {
8513 struct plt_entry *ent;
8514 for (ent = htab->tls_get_addr->elf.plt.plist;
8515 ent != NULL;
8516 ent = ent->next)
8517 if (ent->addend == 0)
8518 {
8519 if (ent->plt.refcount > 0)
8520 {
8521 ent->plt.refcount -= 1;
8522 expecting_tls_get_addr = 0;
8523 }
8524 break;
8525 }
8526 }
8527
8528 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8529 {
8530 struct plt_entry *ent;
8531 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8532 ent != NULL;
8533 ent = ent->next)
8534 if (ent->addend == 0)
8535 {
8536 if (ent->plt.refcount > 0)
8537 ent->plt.refcount -= 1;
8538 break;
8539 }
8540 }
8541
8542 if (tls_clear == 0)
8543 continue;
8544
8545 if ((tls_set & TLS_EXPLICIT) == 0)
8546 {
8547 struct got_entry *ent;
8548
8549 /* Adjust got entry for this reloc. */
8550 if (h != NULL)
8551 ent = h->got.glist;
8552 else
8553 ent = elf_local_got_ents (ibfd)[r_symndx];
8554
8555 for (; ent != NULL; ent = ent->next)
8556 if (ent->addend == rel->r_addend
8557 && ent->owner == ibfd
8558 && ent->tls_type == tls_type)
8559 break;
8560 if (ent == NULL)
8561 abort ();
8562
8563 if (tls_set == 0)
8564 {
8565 /* We managed to get rid of a got entry. */
8566 if (ent->got.refcount > 0)
8567 ent->got.refcount -= 1;
8568 }
8569 }
8570 else
8571 {
8572 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8573 we'll lose one or two dyn relocs. */
8574 if (!dec_dynrel_count (rel->r_info, sec, info,
8575 NULL, h, sym))
8576 return FALSE;
8577
8578 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8579 {
8580 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8581 NULL, h, sym))
8582 return FALSE;
8583 }
8584 }
8585
8586 *tls_mask |= tls_set;
8587 *tls_mask &= ~tls_clear;
8588 }
8589
8590 if (elf_section_data (sec)->relocs != relstart)
8591 free (relstart);
8592 }
8593
8594 if (locsyms != NULL
8595 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8596 {
8597 if (!info->keep_memory)
8598 free (locsyms);
8599 else
8600 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8601 }
8602 }
8603
8604 if (toc_ref != NULL)
8605 free (toc_ref);
8606 return TRUE;
8607 }
8608
8609 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8610 the values of any global symbols in a toc section that has been
8611 edited. Globals in toc sections should be a rarity, so this function
8612 sets a flag if any are found in toc sections other than the one just
8613 edited, so that futher hash table traversals can be avoided. */
8614
8615 struct adjust_toc_info
8616 {
8617 asection *toc;
8618 unsigned long *skip;
8619 bfd_boolean global_toc_syms;
8620 };
8621
8622 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8623
8624 static bfd_boolean
8625 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8626 {
8627 struct ppc_link_hash_entry *eh;
8628 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8629 unsigned long i;
8630
8631 if (h->root.type != bfd_link_hash_defined
8632 && h->root.type != bfd_link_hash_defweak)
8633 return TRUE;
8634
8635 eh = (struct ppc_link_hash_entry *) h;
8636 if (eh->adjust_done)
8637 return TRUE;
8638
8639 if (eh->elf.root.u.def.section == toc_inf->toc)
8640 {
8641 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8642 i = toc_inf->toc->rawsize >> 3;
8643 else
8644 i = eh->elf.root.u.def.value >> 3;
8645
8646 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8647 {
8648 (*_bfd_error_handler)
8649 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8650 do
8651 ++i;
8652 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8653 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8654 }
8655
8656 eh->elf.root.u.def.value -= toc_inf->skip[i];
8657 eh->adjust_done = 1;
8658 }
8659 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8660 toc_inf->global_toc_syms = TRUE;
8661
8662 return TRUE;
8663 }
8664
8665 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8666
8667 static bfd_boolean
8668 ok_lo_toc_insn (unsigned int insn)
8669 {
8670 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8671 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8672 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8673 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8674 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8675 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8676 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8677 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8678 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8679 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8680 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8681 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8682 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8683 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8684 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8685 && (insn & 3) != 1)
8686 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8687 && ((insn & 3) == 0 || (insn & 3) == 3))
8688 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8689 }
8690
8691 /* Examine all relocs referencing .toc sections in order to remove
8692 unused .toc entries. */
8693
8694 bfd_boolean
8695 ppc64_elf_edit_toc (struct bfd_link_info *info)
8696 {
8697 bfd *ibfd;
8698 struct adjust_toc_info toc_inf;
8699 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8700
8701 htab->do_toc_opt = 1;
8702 toc_inf.global_toc_syms = TRUE;
8703 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8704 {
8705 asection *toc, *sec;
8706 Elf_Internal_Shdr *symtab_hdr;
8707 Elf_Internal_Sym *local_syms;
8708 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8709 unsigned long *skip, *drop;
8710 unsigned char *used;
8711 unsigned char *keep, last, some_unused;
8712
8713 if (!is_ppc64_elf (ibfd))
8714 continue;
8715
8716 toc = bfd_get_section_by_name (ibfd, ".toc");
8717 if (toc == NULL
8718 || toc->size == 0
8719 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8720 || discarded_section (toc))
8721 continue;
8722
8723 toc_relocs = NULL;
8724 local_syms = NULL;
8725 symtab_hdr = &elf_symtab_hdr (ibfd);
8726
8727 /* Look at sections dropped from the final link. */
8728 skip = NULL;
8729 relstart = NULL;
8730 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8731 {
8732 if (sec->reloc_count == 0
8733 || !discarded_section (sec)
8734 || get_opd_info (sec)
8735 || (sec->flags & SEC_ALLOC) == 0
8736 || (sec->flags & SEC_DEBUGGING) != 0)
8737 continue;
8738
8739 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8740 if (relstart == NULL)
8741 goto error_ret;
8742
8743 /* Run through the relocs to see which toc entries might be
8744 unused. */
8745 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8746 {
8747 enum elf_ppc64_reloc_type r_type;
8748 unsigned long r_symndx;
8749 asection *sym_sec;
8750 struct elf_link_hash_entry *h;
8751 Elf_Internal_Sym *sym;
8752 bfd_vma val;
8753
8754 r_type = ELF64_R_TYPE (rel->r_info);
8755 switch (r_type)
8756 {
8757 default:
8758 continue;
8759
8760 case R_PPC64_TOC16:
8761 case R_PPC64_TOC16_LO:
8762 case R_PPC64_TOC16_HI:
8763 case R_PPC64_TOC16_HA:
8764 case R_PPC64_TOC16_DS:
8765 case R_PPC64_TOC16_LO_DS:
8766 break;
8767 }
8768
8769 r_symndx = ELF64_R_SYM (rel->r_info);
8770 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8771 r_symndx, ibfd))
8772 goto error_ret;
8773
8774 if (sym_sec != toc)
8775 continue;
8776
8777 if (h != NULL)
8778 val = h->root.u.def.value;
8779 else
8780 val = sym->st_value;
8781 val += rel->r_addend;
8782
8783 if (val >= toc->size)
8784 continue;
8785
8786 /* Anything in the toc ought to be aligned to 8 bytes.
8787 If not, don't mark as unused. */
8788 if (val & 7)
8789 continue;
8790
8791 if (skip == NULL)
8792 {
8793 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8794 if (skip == NULL)
8795 goto error_ret;
8796 }
8797
8798 skip[val >> 3] = ref_from_discarded;
8799 }
8800
8801 if (elf_section_data (sec)->relocs != relstart)
8802 free (relstart);
8803 }
8804
8805 /* For largetoc loads of address constants, we can convert
8806 . addis rx,2,addr@got@ha
8807 . ld ry,addr@got@l(rx)
8808 to
8809 . addis rx,2,addr@toc@ha
8810 . addi ry,rx,addr@toc@l
8811 when addr is within 2G of the toc pointer. This then means
8812 that the word storing "addr" in the toc is no longer needed. */
8813
8814 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8815 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8816 && toc->reloc_count != 0)
8817 {
8818 /* Read toc relocs. */
8819 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8820 info->keep_memory);
8821 if (toc_relocs == NULL)
8822 goto error_ret;
8823
8824 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8825 {
8826 enum elf_ppc64_reloc_type r_type;
8827 unsigned long r_symndx;
8828 asection *sym_sec;
8829 struct elf_link_hash_entry *h;
8830 Elf_Internal_Sym *sym;
8831 bfd_vma val, addr;
8832
8833 r_type = ELF64_R_TYPE (rel->r_info);
8834 if (r_type != R_PPC64_ADDR64)
8835 continue;
8836
8837 r_symndx = ELF64_R_SYM (rel->r_info);
8838 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8839 r_symndx, ibfd))
8840 goto error_ret;
8841
8842 if (sym_sec == NULL
8843 || discarded_section (sym_sec))
8844 continue;
8845
8846 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8847 continue;
8848
8849 if (h != NULL)
8850 {
8851 if (h->type == STT_GNU_IFUNC)
8852 continue;
8853 val = h->root.u.def.value;
8854 }
8855 else
8856 {
8857 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8858 continue;
8859 val = sym->st_value;
8860 }
8861 val += rel->r_addend;
8862 val += sym_sec->output_section->vma + sym_sec->output_offset;
8863
8864 /* We don't yet know the exact toc pointer value, but we
8865 know it will be somewhere in the toc section. Don't
8866 optimize if the difference from any possible toc
8867 pointer is outside [ff..f80008000, 7fff7fff]. */
8868 addr = toc->output_section->vma + TOC_BASE_OFF;
8869 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8870 continue;
8871
8872 addr = toc->output_section->vma + toc->output_section->rawsize;
8873 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8874 continue;
8875
8876 if (skip == NULL)
8877 {
8878 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8879 if (skip == NULL)
8880 goto error_ret;
8881 }
8882
8883 skip[rel->r_offset >> 3]
8884 |= can_optimize | ((rel - toc_relocs) << 2);
8885 }
8886 }
8887
8888 if (skip == NULL)
8889 continue;
8890
8891 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8892 if (used == NULL)
8893 {
8894 error_ret:
8895 if (local_syms != NULL
8896 && symtab_hdr->contents != (unsigned char *) local_syms)
8897 free (local_syms);
8898 if (sec != NULL
8899 && relstart != NULL
8900 && elf_section_data (sec)->relocs != relstart)
8901 free (relstart);
8902 if (toc_relocs != NULL
8903 && elf_section_data (toc)->relocs != toc_relocs)
8904 free (toc_relocs);
8905 if (skip != NULL)
8906 free (skip);
8907 return FALSE;
8908 }
8909
8910 /* Now check all kept sections that might reference the toc.
8911 Check the toc itself last. */
8912 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8913 : ibfd->sections);
8914 sec != NULL;
8915 sec = (sec == toc ? NULL
8916 : sec->next == NULL ? toc
8917 : sec->next == toc && toc->next ? toc->next
8918 : sec->next))
8919 {
8920 int repeat;
8921
8922 if (sec->reloc_count == 0
8923 || discarded_section (sec)
8924 || get_opd_info (sec)
8925 || (sec->flags & SEC_ALLOC) == 0
8926 || (sec->flags & SEC_DEBUGGING) != 0)
8927 continue;
8928
8929 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8930 info->keep_memory);
8931 if (relstart == NULL)
8932 {
8933 free (used);
8934 goto error_ret;
8935 }
8936
8937 /* Mark toc entries referenced as used. */
8938 do
8939 {
8940 repeat = 0;
8941 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8942 {
8943 enum elf_ppc64_reloc_type r_type;
8944 unsigned long r_symndx;
8945 asection *sym_sec;
8946 struct elf_link_hash_entry *h;
8947 Elf_Internal_Sym *sym;
8948 bfd_vma val;
8949 enum {no_check, check_lo, check_ha} insn_check;
8950
8951 r_type = ELF64_R_TYPE (rel->r_info);
8952 switch (r_type)
8953 {
8954 default:
8955 insn_check = no_check;
8956 break;
8957
8958 case R_PPC64_GOT_TLSLD16_HA:
8959 case R_PPC64_GOT_TLSGD16_HA:
8960 case R_PPC64_GOT_TPREL16_HA:
8961 case R_PPC64_GOT_DTPREL16_HA:
8962 case R_PPC64_GOT16_HA:
8963 case R_PPC64_TOC16_HA:
8964 insn_check = check_ha;
8965 break;
8966
8967 case R_PPC64_GOT_TLSLD16_LO:
8968 case R_PPC64_GOT_TLSGD16_LO:
8969 case R_PPC64_GOT_TPREL16_LO_DS:
8970 case R_PPC64_GOT_DTPREL16_LO_DS:
8971 case R_PPC64_GOT16_LO:
8972 case R_PPC64_GOT16_LO_DS:
8973 case R_PPC64_TOC16_LO:
8974 case R_PPC64_TOC16_LO_DS:
8975 insn_check = check_lo;
8976 break;
8977 }
8978
8979 if (insn_check != no_check)
8980 {
8981 bfd_vma off = rel->r_offset & ~3;
8982 unsigned char buf[4];
8983 unsigned int insn;
8984
8985 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8986 {
8987 free (used);
8988 goto error_ret;
8989 }
8990 insn = bfd_get_32 (ibfd, buf);
8991 if (insn_check == check_lo
8992 ? !ok_lo_toc_insn (insn)
8993 : ((insn & ((0x3f << 26) | 0x1f << 16))
8994 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8995 {
8996 char str[12];
8997
8998 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8999 sprintf (str, "%#08x", insn);
9000 info->callbacks->einfo
9001 (_("%P: %H: toc optimization is not supported for"
9002 " %s instruction.\n"),
9003 ibfd, sec, rel->r_offset & ~3, str);
9004 }
9005 }
9006
9007 switch (r_type)
9008 {
9009 case R_PPC64_TOC16:
9010 case R_PPC64_TOC16_LO:
9011 case R_PPC64_TOC16_HI:
9012 case R_PPC64_TOC16_HA:
9013 case R_PPC64_TOC16_DS:
9014 case R_PPC64_TOC16_LO_DS:
9015 /* In case we're taking addresses of toc entries. */
9016 case R_PPC64_ADDR64:
9017 break;
9018
9019 default:
9020 continue;
9021 }
9022
9023 r_symndx = ELF64_R_SYM (rel->r_info);
9024 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9025 r_symndx, ibfd))
9026 {
9027 free (used);
9028 goto error_ret;
9029 }
9030
9031 if (sym_sec != toc)
9032 continue;
9033
9034 if (h != NULL)
9035 val = h->root.u.def.value;
9036 else
9037 val = sym->st_value;
9038 val += rel->r_addend;
9039
9040 if (val >= toc->size)
9041 continue;
9042
9043 if ((skip[val >> 3] & can_optimize) != 0)
9044 {
9045 bfd_vma off;
9046 unsigned char opc;
9047
9048 switch (r_type)
9049 {
9050 case R_PPC64_TOC16_HA:
9051 break;
9052
9053 case R_PPC64_TOC16_LO_DS:
9054 off = rel->r_offset;
9055 off += (bfd_big_endian (ibfd) ? -2 : 3);
9056 if (!bfd_get_section_contents (ibfd, sec, &opc,
9057 off, 1))
9058 {
9059 free (used);
9060 goto error_ret;
9061 }
9062 if ((opc & (0x3f << 2)) == (58u << 2))
9063 break;
9064 /* Fall thru */
9065
9066 default:
9067 /* Wrong sort of reloc, or not a ld. We may
9068 as well clear ref_from_discarded too. */
9069 skip[val >> 3] = 0;
9070 }
9071 }
9072
9073 if (sec != toc)
9074 used[val >> 3] = 1;
9075 /* For the toc section, we only mark as used if this
9076 entry itself isn't unused. */
9077 else if ((used[rel->r_offset >> 3]
9078 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9079 && !used[val >> 3])
9080 {
9081 /* Do all the relocs again, to catch reference
9082 chains. */
9083 repeat = 1;
9084 used[val >> 3] = 1;
9085 }
9086 }
9087 }
9088 while (repeat);
9089
9090 if (elf_section_data (sec)->relocs != relstart)
9091 free (relstart);
9092 }
9093
9094 /* Merge the used and skip arrays. Assume that TOC
9095 doublewords not appearing as either used or unused belong
9096 to to an entry more than one doubleword in size. */
9097 for (drop = skip, keep = used, last = 0, some_unused = 0;
9098 drop < skip + (toc->size + 7) / 8;
9099 ++drop, ++keep)
9100 {
9101 if (*keep)
9102 {
9103 *drop &= ~ref_from_discarded;
9104 if ((*drop & can_optimize) != 0)
9105 some_unused = 1;
9106 last = 0;
9107 }
9108 else if ((*drop & ref_from_discarded) != 0)
9109 {
9110 some_unused = 1;
9111 last = ref_from_discarded;
9112 }
9113 else
9114 *drop = last;
9115 }
9116
9117 free (used);
9118
9119 if (some_unused)
9120 {
9121 bfd_byte *contents, *src;
9122 unsigned long off;
9123 Elf_Internal_Sym *sym;
9124 bfd_boolean local_toc_syms = FALSE;
9125
9126 /* Shuffle the toc contents, and at the same time convert the
9127 skip array from booleans into offsets. */
9128 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9129 goto error_ret;
9130
9131 elf_section_data (toc)->this_hdr.contents = contents;
9132
9133 for (src = contents, off = 0, drop = skip;
9134 src < contents + toc->size;
9135 src += 8, ++drop)
9136 {
9137 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9138 off += 8;
9139 else if (off != 0)
9140 {
9141 *drop = off;
9142 memcpy (src - off, src, 8);
9143 }
9144 }
9145 *drop = off;
9146 toc->rawsize = toc->size;
9147 toc->size = src - contents - off;
9148
9149 /* Adjust addends for relocs against the toc section sym,
9150 and optimize any accesses we can. */
9151 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9152 {
9153 if (sec->reloc_count == 0
9154 || discarded_section (sec))
9155 continue;
9156
9157 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9158 info->keep_memory);
9159 if (relstart == NULL)
9160 goto error_ret;
9161
9162 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9163 {
9164 enum elf_ppc64_reloc_type r_type;
9165 unsigned long r_symndx;
9166 asection *sym_sec;
9167 struct elf_link_hash_entry *h;
9168 bfd_vma val;
9169
9170 r_type = ELF64_R_TYPE (rel->r_info);
9171 switch (r_type)
9172 {
9173 default:
9174 continue;
9175
9176 case R_PPC64_TOC16:
9177 case R_PPC64_TOC16_LO:
9178 case R_PPC64_TOC16_HI:
9179 case R_PPC64_TOC16_HA:
9180 case R_PPC64_TOC16_DS:
9181 case R_PPC64_TOC16_LO_DS:
9182 case R_PPC64_ADDR64:
9183 break;
9184 }
9185
9186 r_symndx = ELF64_R_SYM (rel->r_info);
9187 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9188 r_symndx, ibfd))
9189 goto error_ret;
9190
9191 if (sym_sec != toc)
9192 continue;
9193
9194 if (h != NULL)
9195 val = h->root.u.def.value;
9196 else
9197 {
9198 val = sym->st_value;
9199 if (val != 0)
9200 local_toc_syms = TRUE;
9201 }
9202
9203 val += rel->r_addend;
9204
9205 if (val > toc->rawsize)
9206 val = toc->rawsize;
9207 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9208 continue;
9209 else if ((skip[val >> 3] & can_optimize) != 0)
9210 {
9211 Elf_Internal_Rela *tocrel
9212 = toc_relocs + (skip[val >> 3] >> 2);
9213 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9214
9215 switch (r_type)
9216 {
9217 case R_PPC64_TOC16_HA:
9218 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9219 break;
9220
9221 case R_PPC64_TOC16_LO_DS:
9222 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9223 break;
9224
9225 default:
9226 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9227 ppc_howto_init ();
9228 info->callbacks->einfo
9229 (_("%P: %H: %s references "
9230 "optimized away TOC entry\n"),
9231 ibfd, sec, rel->r_offset,
9232 ppc64_elf_howto_table[r_type]->name);
9233 bfd_set_error (bfd_error_bad_value);
9234 goto error_ret;
9235 }
9236 rel->r_addend = tocrel->r_addend;
9237 elf_section_data (sec)->relocs = relstart;
9238 continue;
9239 }
9240
9241 if (h != NULL || sym->st_value != 0)
9242 continue;
9243
9244 rel->r_addend -= skip[val >> 3];
9245 elf_section_data (sec)->relocs = relstart;
9246 }
9247
9248 if (elf_section_data (sec)->relocs != relstart)
9249 free (relstart);
9250 }
9251
9252 /* We shouldn't have local or global symbols defined in the TOC,
9253 but handle them anyway. */
9254 if (local_syms != NULL)
9255 for (sym = local_syms;
9256 sym < local_syms + symtab_hdr->sh_info;
9257 ++sym)
9258 if (sym->st_value != 0
9259 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9260 {
9261 unsigned long i;
9262
9263 if (sym->st_value > toc->rawsize)
9264 i = toc->rawsize >> 3;
9265 else
9266 i = sym->st_value >> 3;
9267
9268 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9269 {
9270 if (local_toc_syms)
9271 (*_bfd_error_handler)
9272 (_("%s defined on removed toc entry"),
9273 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9274 do
9275 ++i;
9276 while ((skip[i] & (ref_from_discarded | can_optimize)));
9277 sym->st_value = (bfd_vma) i << 3;
9278 }
9279
9280 sym->st_value -= skip[i];
9281 symtab_hdr->contents = (unsigned char *) local_syms;
9282 }
9283
9284 /* Adjust any global syms defined in this toc input section. */
9285 if (toc_inf.global_toc_syms)
9286 {
9287 toc_inf.toc = toc;
9288 toc_inf.skip = skip;
9289 toc_inf.global_toc_syms = FALSE;
9290 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9291 &toc_inf);
9292 }
9293
9294 if (toc->reloc_count != 0)
9295 {
9296 Elf_Internal_Shdr *rel_hdr;
9297 Elf_Internal_Rela *wrel;
9298 bfd_size_type sz;
9299
9300 /* Remove unused toc relocs, and adjust those we keep. */
9301 if (toc_relocs == NULL)
9302 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9303 info->keep_memory);
9304 if (toc_relocs == NULL)
9305 goto error_ret;
9306
9307 wrel = toc_relocs;
9308 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9309 if ((skip[rel->r_offset >> 3]
9310 & (ref_from_discarded | can_optimize)) == 0)
9311 {
9312 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9313 wrel->r_info = rel->r_info;
9314 wrel->r_addend = rel->r_addend;
9315 ++wrel;
9316 }
9317 else if (!dec_dynrel_count (rel->r_info, toc, info,
9318 &local_syms, NULL, NULL))
9319 goto error_ret;
9320
9321 elf_section_data (toc)->relocs = toc_relocs;
9322 toc->reloc_count = wrel - toc_relocs;
9323 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9324 sz = rel_hdr->sh_entsize;
9325 rel_hdr->sh_size = toc->reloc_count * sz;
9326 }
9327 }
9328 else if (toc_relocs != NULL
9329 && elf_section_data (toc)->relocs != toc_relocs)
9330 free (toc_relocs);
9331
9332 if (local_syms != NULL
9333 && symtab_hdr->contents != (unsigned char *) local_syms)
9334 {
9335 if (!info->keep_memory)
9336 free (local_syms);
9337 else
9338 symtab_hdr->contents = (unsigned char *) local_syms;
9339 }
9340 free (skip);
9341 }
9342
9343 return TRUE;
9344 }
9345
9346 /* Return true iff input section I references the TOC using
9347 instructions limited to +/-32k offsets. */
9348
9349 bfd_boolean
9350 ppc64_elf_has_small_toc_reloc (asection *i)
9351 {
9352 return (is_ppc64_elf (i->owner)
9353 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9354 }
9355
9356 /* Allocate space for one GOT entry. */
9357
9358 static void
9359 allocate_got (struct elf_link_hash_entry *h,
9360 struct bfd_link_info *info,
9361 struct got_entry *gent)
9362 {
9363 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9364 bfd_boolean dyn;
9365 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9366 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9367 ? 16 : 8);
9368 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9369 ? 2 : 1) * sizeof (Elf64_External_Rela);
9370 asection *got = ppc64_elf_tdata (gent->owner)->got;
9371
9372 gent->got.offset = got->size;
9373 got->size += entsize;
9374
9375 dyn = htab->elf.dynamic_sections_created;
9376 if (h->type == STT_GNU_IFUNC)
9377 {
9378 htab->elf.irelplt->size += rentsize;
9379 htab->got_reli_size += rentsize;
9380 }
9381 else if ((bfd_link_pic (info)
9382 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9383 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9384 || h->root.type != bfd_link_hash_undefweak))
9385 {
9386 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9387 relgot->size += rentsize;
9388 }
9389 }
9390
9391 /* This function merges got entries in the same toc group. */
9392
9393 static void
9394 merge_got_entries (struct got_entry **pent)
9395 {
9396 struct got_entry *ent, *ent2;
9397
9398 for (ent = *pent; ent != NULL; ent = ent->next)
9399 if (!ent->is_indirect)
9400 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9401 if (!ent2->is_indirect
9402 && ent2->addend == ent->addend
9403 && ent2->tls_type == ent->tls_type
9404 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9405 {
9406 ent2->is_indirect = TRUE;
9407 ent2->got.ent = ent;
9408 }
9409 }
9410
9411 /* Allocate space in .plt, .got and associated reloc sections for
9412 dynamic relocs. */
9413
9414 static bfd_boolean
9415 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9416 {
9417 struct bfd_link_info *info;
9418 struct ppc_link_hash_table *htab;
9419 asection *s;
9420 struct ppc_link_hash_entry *eh;
9421 struct elf_dyn_relocs *p;
9422 struct got_entry **pgent, *gent;
9423
9424 if (h->root.type == bfd_link_hash_indirect)
9425 return TRUE;
9426
9427 info = (struct bfd_link_info *) inf;
9428 htab = ppc_hash_table (info);
9429 if (htab == NULL)
9430 return FALSE;
9431
9432 if ((htab->elf.dynamic_sections_created
9433 && h->dynindx != -1
9434 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9435 || h->type == STT_GNU_IFUNC)
9436 {
9437 struct plt_entry *pent;
9438 bfd_boolean doneone = FALSE;
9439 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9440 if (pent->plt.refcount > 0)
9441 {
9442 if (!htab->elf.dynamic_sections_created
9443 || h->dynindx == -1)
9444 {
9445 s = htab->elf.iplt;
9446 pent->plt.offset = s->size;
9447 s->size += PLT_ENTRY_SIZE (htab);
9448 s = htab->elf.irelplt;
9449 }
9450 else
9451 {
9452 /* If this is the first .plt entry, make room for the special
9453 first entry. */
9454 s = htab->elf.splt;
9455 if (s->size == 0)
9456 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9457
9458 pent->plt.offset = s->size;
9459
9460 /* Make room for this entry. */
9461 s->size += PLT_ENTRY_SIZE (htab);
9462
9463 /* Make room for the .glink code. */
9464 s = htab->glink;
9465 if (s->size == 0)
9466 s->size += GLINK_CALL_STUB_SIZE;
9467 if (htab->opd_abi)
9468 {
9469 /* We need bigger stubs past index 32767. */
9470 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9471 s->size += 4;
9472 s->size += 2*4;
9473 }
9474 else
9475 s->size += 4;
9476
9477 /* We also need to make an entry in the .rela.plt section. */
9478 s = htab->elf.srelplt;
9479 }
9480 s->size += sizeof (Elf64_External_Rela);
9481 doneone = TRUE;
9482 }
9483 else
9484 pent->plt.offset = (bfd_vma) -1;
9485 if (!doneone)
9486 {
9487 h->plt.plist = NULL;
9488 h->needs_plt = 0;
9489 }
9490 }
9491 else
9492 {
9493 h->plt.plist = NULL;
9494 h->needs_plt = 0;
9495 }
9496
9497 eh = (struct ppc_link_hash_entry *) h;
9498 /* Run through the TLS GD got entries first if we're changing them
9499 to TPREL. */
9500 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9501 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9502 if (gent->got.refcount > 0
9503 && (gent->tls_type & TLS_GD) != 0)
9504 {
9505 /* This was a GD entry that has been converted to TPREL. If
9506 there happens to be a TPREL entry we can use that one. */
9507 struct got_entry *ent;
9508 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9509 if (ent->got.refcount > 0
9510 && (ent->tls_type & TLS_TPREL) != 0
9511 && ent->addend == gent->addend
9512 && ent->owner == gent->owner)
9513 {
9514 gent->got.refcount = 0;
9515 break;
9516 }
9517
9518 /* If not, then we'll be using our own TPREL entry. */
9519 if (gent->got.refcount != 0)
9520 gent->tls_type = TLS_TLS | TLS_TPREL;
9521 }
9522
9523 /* Remove any list entry that won't generate a word in the GOT before
9524 we call merge_got_entries. Otherwise we risk merging to empty
9525 entries. */
9526 pgent = &h->got.glist;
9527 while ((gent = *pgent) != NULL)
9528 if (gent->got.refcount > 0)
9529 {
9530 if ((gent->tls_type & TLS_LD) != 0
9531 && !h->def_dynamic)
9532 {
9533 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9534 *pgent = gent->next;
9535 }
9536 else
9537 pgent = &gent->next;
9538 }
9539 else
9540 *pgent = gent->next;
9541
9542 if (!htab->do_multi_toc)
9543 merge_got_entries (&h->got.glist);
9544
9545 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9546 if (!gent->is_indirect)
9547 {
9548 /* Make sure this symbol is output as a dynamic symbol.
9549 Undefined weak syms won't yet be marked as dynamic,
9550 nor will all TLS symbols. */
9551 if (h->dynindx == -1
9552 && !h->forced_local
9553 && h->type != STT_GNU_IFUNC
9554 && htab->elf.dynamic_sections_created)
9555 {
9556 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9557 return FALSE;
9558 }
9559
9560 if (!is_ppc64_elf (gent->owner))
9561 abort ();
9562
9563 allocate_got (h, info, gent);
9564 }
9565
9566 if (eh->dyn_relocs == NULL
9567 || (!htab->elf.dynamic_sections_created
9568 && h->type != STT_GNU_IFUNC))
9569 return TRUE;
9570
9571 /* In the shared -Bsymbolic case, discard space allocated for
9572 dynamic pc-relative relocs against symbols which turn out to be
9573 defined in regular objects. For the normal shared case, discard
9574 space for relocs that have become local due to symbol visibility
9575 changes. */
9576
9577 if (bfd_link_pic (info))
9578 {
9579 /* Relocs that use pc_count are those that appear on a call insn,
9580 or certain REL relocs (see must_be_dyn_reloc) that can be
9581 generated via assembly. We want calls to protected symbols to
9582 resolve directly to the function rather than going via the plt.
9583 If people want function pointer comparisons to work as expected
9584 then they should avoid writing weird assembly. */
9585 if (SYMBOL_CALLS_LOCAL (info, h))
9586 {
9587 struct elf_dyn_relocs **pp;
9588
9589 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9590 {
9591 p->count -= p->pc_count;
9592 p->pc_count = 0;
9593 if (p->count == 0)
9594 *pp = p->next;
9595 else
9596 pp = &p->next;
9597 }
9598 }
9599
9600 /* Also discard relocs on undefined weak syms with non-default
9601 visibility. */
9602 if (eh->dyn_relocs != NULL
9603 && h->root.type == bfd_link_hash_undefweak)
9604 {
9605 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9606 eh->dyn_relocs = NULL;
9607
9608 /* Make sure this symbol is output as a dynamic symbol.
9609 Undefined weak syms won't yet be marked as dynamic. */
9610 else if (h->dynindx == -1
9611 && !h->forced_local)
9612 {
9613 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9614 return FALSE;
9615 }
9616 }
9617 }
9618 else if (h->type == STT_GNU_IFUNC)
9619 {
9620 if (!h->non_got_ref)
9621 eh->dyn_relocs = NULL;
9622 }
9623 else if (ELIMINATE_COPY_RELOCS)
9624 {
9625 /* For the non-shared case, discard space for relocs against
9626 symbols which turn out to need copy relocs or are not
9627 dynamic. */
9628
9629 if (!h->non_got_ref
9630 && !h->def_regular)
9631 {
9632 /* Make sure this symbol is output as a dynamic symbol.
9633 Undefined weak syms won't yet be marked as dynamic. */
9634 if (h->dynindx == -1
9635 && !h->forced_local)
9636 {
9637 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9638 return FALSE;
9639 }
9640
9641 /* If that succeeded, we know we'll be keeping all the
9642 relocs. */
9643 if (h->dynindx != -1)
9644 goto keep;
9645 }
9646
9647 eh->dyn_relocs = NULL;
9648
9649 keep: ;
9650 }
9651
9652 /* Finally, allocate space. */
9653 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9654 {
9655 asection *sreloc = elf_section_data (p->sec)->sreloc;
9656 if (eh->elf.type == STT_GNU_IFUNC)
9657 sreloc = htab->elf.irelplt;
9658 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9659 }
9660
9661 return TRUE;
9662 }
9663
9664 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9665 to set up space for global entry stubs. These are put in glink,
9666 after the branch table. */
9667
9668 static bfd_boolean
9669 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9670 {
9671 struct bfd_link_info *info;
9672 struct ppc_link_hash_table *htab;
9673 struct plt_entry *pent;
9674 asection *s;
9675
9676 if (h->root.type == bfd_link_hash_indirect)
9677 return TRUE;
9678
9679 if (!h->pointer_equality_needed)
9680 return TRUE;
9681
9682 if (h->def_regular)
9683 return TRUE;
9684
9685 info = inf;
9686 htab = ppc_hash_table (info);
9687 if (htab == NULL)
9688 return FALSE;
9689
9690 s = htab->glink;
9691 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9692 if (pent->plt.offset != (bfd_vma) -1
9693 && pent->addend == 0)
9694 {
9695 /* For ELFv2, if this symbol is not defined in a regular file
9696 and we are not generating a shared library or pie, then we
9697 need to define the symbol in the executable on a call stub.
9698 This is to avoid text relocations. */
9699 s->size = (s->size + 15) & -16;
9700 h->root.u.def.section = s;
9701 h->root.u.def.value = s->size;
9702 s->size += 16;
9703 break;
9704 }
9705 return TRUE;
9706 }
9707
9708 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9709 read-only sections. */
9710
9711 static bfd_boolean
9712 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9713 {
9714 if (h->root.type == bfd_link_hash_indirect)
9715 return TRUE;
9716
9717 if (readonly_dynrelocs (h))
9718 {
9719 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9720
9721 /* Not an error, just cut short the traversal. */
9722 return FALSE;
9723 }
9724 return TRUE;
9725 }
9726
9727 /* Set the sizes of the dynamic sections. */
9728
9729 static bfd_boolean
9730 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9731 struct bfd_link_info *info)
9732 {
9733 struct ppc_link_hash_table *htab;
9734 bfd *dynobj;
9735 asection *s;
9736 bfd_boolean relocs;
9737 bfd *ibfd;
9738 struct got_entry *first_tlsld;
9739
9740 htab = ppc_hash_table (info);
9741 if (htab == NULL)
9742 return FALSE;
9743
9744 dynobj = htab->elf.dynobj;
9745 if (dynobj == NULL)
9746 abort ();
9747
9748 if (htab->elf.dynamic_sections_created)
9749 {
9750 /* Set the contents of the .interp section to the interpreter. */
9751 if (bfd_link_executable (info))
9752 {
9753 s = bfd_get_linker_section (dynobj, ".interp");
9754 if (s == NULL)
9755 abort ();
9756 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9757 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9758 }
9759 }
9760
9761 /* Set up .got offsets for local syms, and space for local dynamic
9762 relocs. */
9763 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9764 {
9765 struct got_entry **lgot_ents;
9766 struct got_entry **end_lgot_ents;
9767 struct plt_entry **local_plt;
9768 struct plt_entry **end_local_plt;
9769 unsigned char *lgot_masks;
9770 bfd_size_type locsymcount;
9771 Elf_Internal_Shdr *symtab_hdr;
9772
9773 if (!is_ppc64_elf (ibfd))
9774 continue;
9775
9776 for (s = ibfd->sections; s != NULL; s = s->next)
9777 {
9778 struct ppc_dyn_relocs *p;
9779
9780 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9781 {
9782 if (!bfd_is_abs_section (p->sec)
9783 && bfd_is_abs_section (p->sec->output_section))
9784 {
9785 /* Input section has been discarded, either because
9786 it is a copy of a linkonce section or due to
9787 linker script /DISCARD/, so we'll be discarding
9788 the relocs too. */
9789 }
9790 else if (p->count != 0)
9791 {
9792 asection *srel = elf_section_data (p->sec)->sreloc;
9793 if (p->ifunc)
9794 srel = htab->elf.irelplt;
9795 srel->size += p->count * sizeof (Elf64_External_Rela);
9796 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9797 info->flags |= DF_TEXTREL;
9798 }
9799 }
9800 }
9801
9802 lgot_ents = elf_local_got_ents (ibfd);
9803 if (!lgot_ents)
9804 continue;
9805
9806 symtab_hdr = &elf_symtab_hdr (ibfd);
9807 locsymcount = symtab_hdr->sh_info;
9808 end_lgot_ents = lgot_ents + locsymcount;
9809 local_plt = (struct plt_entry **) end_lgot_ents;
9810 end_local_plt = local_plt + locsymcount;
9811 lgot_masks = (unsigned char *) end_local_plt;
9812 s = ppc64_elf_tdata (ibfd)->got;
9813 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9814 {
9815 struct got_entry **pent, *ent;
9816
9817 pent = lgot_ents;
9818 while ((ent = *pent) != NULL)
9819 if (ent->got.refcount > 0)
9820 {
9821 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9822 {
9823 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9824 *pent = ent->next;
9825 }
9826 else
9827 {
9828 unsigned int ent_size = 8;
9829 unsigned int rel_size = sizeof (Elf64_External_Rela);
9830
9831 ent->got.offset = s->size;
9832 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9833 {
9834 ent_size *= 2;
9835 rel_size *= 2;
9836 }
9837 s->size += ent_size;
9838 if ((*lgot_masks & PLT_IFUNC) != 0)
9839 {
9840 htab->elf.irelplt->size += rel_size;
9841 htab->got_reli_size += rel_size;
9842 }
9843 else if (bfd_link_pic (info))
9844 {
9845 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9846 srel->size += rel_size;
9847 }
9848 pent = &ent->next;
9849 }
9850 }
9851 else
9852 *pent = ent->next;
9853 }
9854
9855 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9856 for (; local_plt < end_local_plt; ++local_plt)
9857 {
9858 struct plt_entry *ent;
9859
9860 for (ent = *local_plt; ent != NULL; ent = ent->next)
9861 if (ent->plt.refcount > 0)
9862 {
9863 s = htab->elf.iplt;
9864 ent->plt.offset = s->size;
9865 s->size += PLT_ENTRY_SIZE (htab);
9866
9867 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9868 }
9869 else
9870 ent->plt.offset = (bfd_vma) -1;
9871 }
9872 }
9873
9874 /* Allocate global sym .plt and .got entries, and space for global
9875 sym dynamic relocs. */
9876 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9877 /* Stash the end of glink branch table. */
9878 if (htab->glink != NULL)
9879 htab->glink->rawsize = htab->glink->size;
9880
9881 if (!htab->opd_abi && !bfd_link_pic (info))
9882 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
9883
9884 first_tlsld = NULL;
9885 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9886 {
9887 struct got_entry *ent;
9888
9889 if (!is_ppc64_elf (ibfd))
9890 continue;
9891
9892 ent = ppc64_tlsld_got (ibfd);
9893 if (ent->got.refcount > 0)
9894 {
9895 if (!htab->do_multi_toc && first_tlsld != NULL)
9896 {
9897 ent->is_indirect = TRUE;
9898 ent->got.ent = first_tlsld;
9899 }
9900 else
9901 {
9902 if (first_tlsld == NULL)
9903 first_tlsld = ent;
9904 s = ppc64_elf_tdata (ibfd)->got;
9905 ent->got.offset = s->size;
9906 ent->owner = ibfd;
9907 s->size += 16;
9908 if (bfd_link_pic (info))
9909 {
9910 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9911 srel->size += sizeof (Elf64_External_Rela);
9912 }
9913 }
9914 }
9915 else
9916 ent->got.offset = (bfd_vma) -1;
9917 }
9918
9919 /* We now have determined the sizes of the various dynamic sections.
9920 Allocate memory for them. */
9921 relocs = FALSE;
9922 for (s = dynobj->sections; s != NULL; s = s->next)
9923 {
9924 if ((s->flags & SEC_LINKER_CREATED) == 0)
9925 continue;
9926
9927 if (s == htab->brlt || s == htab->relbrlt)
9928 /* These haven't been allocated yet; don't strip. */
9929 continue;
9930 else if (s == htab->elf.sgot
9931 || s == htab->elf.splt
9932 || s == htab->elf.iplt
9933 || s == htab->glink
9934 || s == htab->dynbss)
9935 {
9936 /* Strip this section if we don't need it; see the
9937 comment below. */
9938 }
9939 else if (s == htab->glink_eh_frame)
9940 {
9941 if (!bfd_is_abs_section (s->output_section))
9942 /* Not sized yet. */
9943 continue;
9944 }
9945 else if (CONST_STRNEQ (s->name, ".rela"))
9946 {
9947 if (s->size != 0)
9948 {
9949 if (s != htab->elf.srelplt)
9950 relocs = TRUE;
9951
9952 /* We use the reloc_count field as a counter if we need
9953 to copy relocs into the output file. */
9954 s->reloc_count = 0;
9955 }
9956 }
9957 else
9958 {
9959 /* It's not one of our sections, so don't allocate space. */
9960 continue;
9961 }
9962
9963 if (s->size == 0)
9964 {
9965 /* If we don't need this section, strip it from the
9966 output file. This is mostly to handle .rela.bss and
9967 .rela.plt. We must create both sections in
9968 create_dynamic_sections, because they must be created
9969 before the linker maps input sections to output
9970 sections. The linker does that before
9971 adjust_dynamic_symbol is called, and it is that
9972 function which decides whether anything needs to go
9973 into these sections. */
9974 s->flags |= SEC_EXCLUDE;
9975 continue;
9976 }
9977
9978 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9979 continue;
9980
9981 /* Allocate memory for the section contents. We use bfd_zalloc
9982 here in case unused entries are not reclaimed before the
9983 section's contents are written out. This should not happen,
9984 but this way if it does we get a R_PPC64_NONE reloc in .rela
9985 sections instead of garbage.
9986 We also rely on the section contents being zero when writing
9987 the GOT. */
9988 s->contents = bfd_zalloc (dynobj, s->size);
9989 if (s->contents == NULL)
9990 return FALSE;
9991 }
9992
9993 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9994 {
9995 if (!is_ppc64_elf (ibfd))
9996 continue;
9997
9998 s = ppc64_elf_tdata (ibfd)->got;
9999 if (s != NULL && s != htab->elf.sgot)
10000 {
10001 if (s->size == 0)
10002 s->flags |= SEC_EXCLUDE;
10003 else
10004 {
10005 s->contents = bfd_zalloc (ibfd, s->size);
10006 if (s->contents == NULL)
10007 return FALSE;
10008 }
10009 }
10010 s = ppc64_elf_tdata (ibfd)->relgot;
10011 if (s != NULL)
10012 {
10013 if (s->size == 0)
10014 s->flags |= SEC_EXCLUDE;
10015 else
10016 {
10017 s->contents = bfd_zalloc (ibfd, s->size);
10018 if (s->contents == NULL)
10019 return FALSE;
10020 relocs = TRUE;
10021 s->reloc_count = 0;
10022 }
10023 }
10024 }
10025
10026 if (htab->elf.dynamic_sections_created)
10027 {
10028 bfd_boolean tls_opt;
10029
10030 /* Add some entries to the .dynamic section. We fill in the
10031 values later, in ppc64_elf_finish_dynamic_sections, but we
10032 must add the entries now so that we get the correct size for
10033 the .dynamic section. The DT_DEBUG entry is filled in by the
10034 dynamic linker and used by the debugger. */
10035 #define add_dynamic_entry(TAG, VAL) \
10036 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10037
10038 if (bfd_link_executable (info))
10039 {
10040 if (!add_dynamic_entry (DT_DEBUG, 0))
10041 return FALSE;
10042 }
10043
10044 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10045 {
10046 if (!add_dynamic_entry (DT_PLTGOT, 0)
10047 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10048 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10049 || !add_dynamic_entry (DT_JMPREL, 0)
10050 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10051 return FALSE;
10052 }
10053
10054 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10055 {
10056 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10057 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10058 return FALSE;
10059 }
10060
10061 tls_opt = (!htab->params->no_tls_get_addr_opt
10062 && htab->tls_get_addr_fd != NULL
10063 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10064 if (tls_opt || !htab->opd_abi)
10065 {
10066 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10067 return FALSE;
10068 }
10069
10070 if (relocs)
10071 {
10072 if (!add_dynamic_entry (DT_RELA, 0)
10073 || !add_dynamic_entry (DT_RELASZ, 0)
10074 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10075 return FALSE;
10076
10077 /* If any dynamic relocs apply to a read-only section,
10078 then we need a DT_TEXTREL entry. */
10079 if ((info->flags & DF_TEXTREL) == 0)
10080 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10081
10082 if ((info->flags & DF_TEXTREL) != 0)
10083 {
10084 if (!add_dynamic_entry (DT_TEXTREL, 0))
10085 return FALSE;
10086 }
10087 }
10088 }
10089 #undef add_dynamic_entry
10090
10091 return TRUE;
10092 }
10093
10094 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10095
10096 static bfd_boolean
10097 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10098 {
10099 if (h->plt.plist != NULL
10100 && !h->def_regular
10101 && !h->pointer_equality_needed)
10102 return FALSE;
10103
10104 return _bfd_elf_hash_symbol (h);
10105 }
10106
10107 /* Determine the type of stub needed, if any, for a call. */
10108
10109 static inline enum ppc_stub_type
10110 ppc_type_of_stub (asection *input_sec,
10111 const Elf_Internal_Rela *rel,
10112 struct ppc_link_hash_entry **hash,
10113 struct plt_entry **plt_ent,
10114 bfd_vma destination,
10115 unsigned long local_off)
10116 {
10117 struct ppc_link_hash_entry *h = *hash;
10118 bfd_vma location;
10119 bfd_vma branch_offset;
10120 bfd_vma max_branch_offset;
10121 enum elf_ppc64_reloc_type r_type;
10122
10123 if (h != NULL)
10124 {
10125 struct plt_entry *ent;
10126 struct ppc_link_hash_entry *fdh = h;
10127 if (h->oh != NULL
10128 && h->oh->is_func_descriptor)
10129 {
10130 fdh = ppc_follow_link (h->oh);
10131 *hash = fdh;
10132 }
10133
10134 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10135 if (ent->addend == rel->r_addend
10136 && ent->plt.offset != (bfd_vma) -1)
10137 {
10138 *plt_ent = ent;
10139 return ppc_stub_plt_call;
10140 }
10141
10142 /* Here, we know we don't have a plt entry. If we don't have a
10143 either a defined function descriptor or a defined entry symbol
10144 in a regular object file, then it is pointless trying to make
10145 any other type of stub. */
10146 if (!is_static_defined (&fdh->elf)
10147 && !is_static_defined (&h->elf))
10148 return ppc_stub_none;
10149 }
10150 else if (elf_local_got_ents (input_sec->owner) != NULL)
10151 {
10152 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10153 struct plt_entry **local_plt = (struct plt_entry **)
10154 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10155 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10156
10157 if (local_plt[r_symndx] != NULL)
10158 {
10159 struct plt_entry *ent;
10160
10161 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10162 if (ent->addend == rel->r_addend
10163 && ent->plt.offset != (bfd_vma) -1)
10164 {
10165 *plt_ent = ent;
10166 return ppc_stub_plt_call;
10167 }
10168 }
10169 }
10170
10171 /* Determine where the call point is. */
10172 location = (input_sec->output_offset
10173 + input_sec->output_section->vma
10174 + rel->r_offset);
10175
10176 branch_offset = destination - location;
10177 r_type = ELF64_R_TYPE (rel->r_info);
10178
10179 /* Determine if a long branch stub is needed. */
10180 max_branch_offset = 1 << 25;
10181 if (r_type != R_PPC64_REL24)
10182 max_branch_offset = 1 << 15;
10183
10184 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10185 /* We need a stub. Figure out whether a long_branch or plt_branch
10186 is needed later. */
10187 return ppc_stub_long_branch;
10188
10189 return ppc_stub_none;
10190 }
10191
10192 /* With power7 weakly ordered memory model, it is possible for ld.so
10193 to update a plt entry in one thread and have another thread see a
10194 stale zero toc entry. To avoid this we need some sort of acquire
10195 barrier in the call stub. One solution is to make the load of the
10196 toc word seem to appear to depend on the load of the function entry
10197 word. Another solution is to test for r2 being zero, and branch to
10198 the appropriate glink entry if so.
10199
10200 . fake dep barrier compare
10201 . ld 12,xxx(2) ld 12,xxx(2)
10202 . mtctr 12 mtctr 12
10203 . xor 11,12,12 ld 2,xxx+8(2)
10204 . add 2,2,11 cmpldi 2,0
10205 . ld 2,xxx+8(2) bnectr+
10206 . bctr b <glink_entry>
10207
10208 The solution involving the compare turns out to be faster, so
10209 that's what we use unless the branch won't reach. */
10210
10211 #define ALWAYS_USE_FAKE_DEP 0
10212 #define ALWAYS_EMIT_R2SAVE 0
10213
10214 #define PPC_LO(v) ((v) & 0xffff)
10215 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10216 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10217
10218 static inline unsigned int
10219 plt_stub_size (struct ppc_link_hash_table *htab,
10220 struct ppc_stub_hash_entry *stub_entry,
10221 bfd_vma off)
10222 {
10223 unsigned size = 12;
10224
10225 if (ALWAYS_EMIT_R2SAVE
10226 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10227 size += 4;
10228 if (PPC_HA (off) != 0)
10229 size += 4;
10230 if (htab->opd_abi)
10231 {
10232 size += 4;
10233 if (htab->params->plt_static_chain)
10234 size += 4;
10235 if (htab->params->plt_thread_safe
10236 && htab->elf.dynamic_sections_created
10237 && stub_entry->h != NULL
10238 && stub_entry->h->elf.dynindx != -1)
10239 size += 8;
10240 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10241 size += 4;
10242 }
10243 if (stub_entry->h != NULL
10244 && (stub_entry->h == htab->tls_get_addr_fd
10245 || stub_entry->h == htab->tls_get_addr)
10246 && !htab->params->no_tls_get_addr_opt)
10247 size += 13 * 4;
10248 return size;
10249 }
10250
10251 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10252 then return the padding needed to do so. */
10253 static inline unsigned int
10254 plt_stub_pad (struct ppc_link_hash_table *htab,
10255 struct ppc_stub_hash_entry *stub_entry,
10256 bfd_vma plt_off)
10257 {
10258 int stub_align = 1 << htab->params->plt_stub_align;
10259 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10260 bfd_vma stub_off = stub_entry->stub_sec->size;
10261
10262 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10263 > ((stub_size - 1) & -stub_align))
10264 return stub_align - (stub_off & (stub_align - 1));
10265 return 0;
10266 }
10267
10268 /* Build a .plt call stub. */
10269
10270 static inline bfd_byte *
10271 build_plt_stub (struct ppc_link_hash_table *htab,
10272 struct ppc_stub_hash_entry *stub_entry,
10273 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10274 {
10275 bfd *obfd = htab->params->stub_bfd;
10276 bfd_boolean plt_load_toc = htab->opd_abi;
10277 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10278 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10279 && htab->elf.dynamic_sections_created
10280 && stub_entry->h != NULL
10281 && stub_entry->h->elf.dynindx != -1);
10282 bfd_boolean use_fake_dep = plt_thread_safe;
10283 bfd_vma cmp_branch_off = 0;
10284
10285 if (!ALWAYS_USE_FAKE_DEP
10286 && plt_load_toc
10287 && plt_thread_safe
10288 && !((stub_entry->h == htab->tls_get_addr_fd
10289 || stub_entry->h == htab->tls_get_addr)
10290 && !htab->params->no_tls_get_addr_opt))
10291 {
10292 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10293 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10294 / PLT_ENTRY_SIZE (htab));
10295 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10296 bfd_vma to, from;
10297
10298 if (pltindex > 32768)
10299 glinkoff += (pltindex - 32768) * 4;
10300 to = (glinkoff
10301 + htab->glink->output_offset
10302 + htab->glink->output_section->vma);
10303 from = (p - stub_entry->stub_sec->contents
10304 + 4 * (ALWAYS_EMIT_R2SAVE
10305 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10306 + 4 * (PPC_HA (offset) != 0)
10307 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10308 != PPC_HA (offset))
10309 + 4 * (plt_static_chain != 0)
10310 + 20
10311 + stub_entry->stub_sec->output_offset
10312 + stub_entry->stub_sec->output_section->vma);
10313 cmp_branch_off = to - from;
10314 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10315 }
10316
10317 if (PPC_HA (offset) != 0)
10318 {
10319 if (r != NULL)
10320 {
10321 if (ALWAYS_EMIT_R2SAVE
10322 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10323 r[0].r_offset += 4;
10324 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10325 r[1].r_offset = r[0].r_offset + 4;
10326 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10327 r[1].r_addend = r[0].r_addend;
10328 if (plt_load_toc)
10329 {
10330 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10331 {
10332 r[2].r_offset = r[1].r_offset + 4;
10333 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10334 r[2].r_addend = r[0].r_addend;
10335 }
10336 else
10337 {
10338 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10339 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10340 r[2].r_addend = r[0].r_addend + 8;
10341 if (plt_static_chain)
10342 {
10343 r[3].r_offset = r[2].r_offset + 4;
10344 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10345 r[3].r_addend = r[0].r_addend + 16;
10346 }
10347 }
10348 }
10349 }
10350 if (ALWAYS_EMIT_R2SAVE
10351 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10352 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10353 if (plt_load_toc)
10354 {
10355 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10356 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10357 }
10358 else
10359 {
10360 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10361 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10362 }
10363 if (plt_load_toc
10364 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10365 {
10366 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10367 offset = 0;
10368 }
10369 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10370 if (plt_load_toc)
10371 {
10372 if (use_fake_dep)
10373 {
10374 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10375 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10376 }
10377 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10378 if (plt_static_chain)
10379 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10380 }
10381 }
10382 else
10383 {
10384 if (r != NULL)
10385 {
10386 if (ALWAYS_EMIT_R2SAVE
10387 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10388 r[0].r_offset += 4;
10389 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10390 if (plt_load_toc)
10391 {
10392 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10393 {
10394 r[1].r_offset = r[0].r_offset + 4;
10395 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10396 r[1].r_addend = r[0].r_addend;
10397 }
10398 else
10399 {
10400 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10401 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10402 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10403 if (plt_static_chain)
10404 {
10405 r[2].r_offset = r[1].r_offset + 4;
10406 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10407 r[2].r_addend = r[0].r_addend + 8;
10408 }
10409 }
10410 }
10411 }
10412 if (ALWAYS_EMIT_R2SAVE
10413 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10414 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10415 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10416 if (plt_load_toc
10417 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10418 {
10419 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10420 offset = 0;
10421 }
10422 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10423 if (plt_load_toc)
10424 {
10425 if (use_fake_dep)
10426 {
10427 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10428 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10429 }
10430 if (plt_static_chain)
10431 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10432 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10433 }
10434 }
10435 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10436 {
10437 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10438 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10439 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10440 }
10441 else
10442 bfd_put_32 (obfd, BCTR, p), p += 4;
10443 return p;
10444 }
10445
10446 /* Build a special .plt call stub for __tls_get_addr. */
10447
10448 #define LD_R11_0R3 0xe9630000
10449 #define LD_R12_0R3 0xe9830000
10450 #define MR_R0_R3 0x7c601b78
10451 #define CMPDI_R11_0 0x2c2b0000
10452 #define ADD_R3_R12_R13 0x7c6c6a14
10453 #define BEQLR 0x4d820020
10454 #define MR_R3_R0 0x7c030378
10455 #define STD_R11_0R1 0xf9610000
10456 #define BCTRL 0x4e800421
10457 #define LD_R11_0R1 0xe9610000
10458 #define MTLR_R11 0x7d6803a6
10459
10460 static inline bfd_byte *
10461 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10462 struct ppc_stub_hash_entry *stub_entry,
10463 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10464 {
10465 bfd *obfd = htab->params->stub_bfd;
10466
10467 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10468 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10469 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10470 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10471 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10472 bfd_put_32 (obfd, BEQLR, p), p += 4;
10473 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10474 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10475 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10476
10477 if (r != NULL)
10478 r[0].r_offset += 9 * 4;
10479 p = build_plt_stub (htab, stub_entry, p, offset, r);
10480 bfd_put_32 (obfd, BCTRL, p - 4);
10481
10482 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10483 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10484 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10485 bfd_put_32 (obfd, BLR, p), p += 4;
10486
10487 return p;
10488 }
10489
10490 static Elf_Internal_Rela *
10491 get_relocs (asection *sec, int count)
10492 {
10493 Elf_Internal_Rela *relocs;
10494 struct bfd_elf_section_data *elfsec_data;
10495
10496 elfsec_data = elf_section_data (sec);
10497 relocs = elfsec_data->relocs;
10498 if (relocs == NULL)
10499 {
10500 bfd_size_type relsize;
10501 relsize = sec->reloc_count * sizeof (*relocs);
10502 relocs = bfd_alloc (sec->owner, relsize);
10503 if (relocs == NULL)
10504 return NULL;
10505 elfsec_data->relocs = relocs;
10506 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10507 sizeof (Elf_Internal_Shdr));
10508 if (elfsec_data->rela.hdr == NULL)
10509 return NULL;
10510 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10511 * sizeof (Elf64_External_Rela));
10512 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10513 sec->reloc_count = 0;
10514 }
10515 relocs += sec->reloc_count;
10516 sec->reloc_count += count;
10517 return relocs;
10518 }
10519
10520 static bfd_vma
10521 get_r2off (struct bfd_link_info *info,
10522 struct ppc_stub_hash_entry *stub_entry)
10523 {
10524 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10525 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
10526
10527 if (r2off == 0)
10528 {
10529 /* Support linking -R objects. Get the toc pointer from the
10530 opd entry. */
10531 char buf[8];
10532 if (!htab->opd_abi)
10533 return r2off;
10534 asection *opd = stub_entry->h->elf.root.u.def.section;
10535 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10536
10537 if (strcmp (opd->name, ".opd") != 0
10538 || opd->reloc_count != 0)
10539 {
10540 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10541 stub_entry->h->elf.root.root.string);
10542 bfd_set_error (bfd_error_bad_value);
10543 return 0;
10544 }
10545 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10546 return 0;
10547 r2off = bfd_get_64 (opd->owner, buf);
10548 r2off -= elf_gp (info->output_bfd);
10549 }
10550 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
10551 return r2off;
10552 }
10553
10554 static bfd_boolean
10555 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10556 {
10557 struct ppc_stub_hash_entry *stub_entry;
10558 struct ppc_branch_hash_entry *br_entry;
10559 struct bfd_link_info *info;
10560 struct ppc_link_hash_table *htab;
10561 bfd_byte *loc;
10562 bfd_byte *p;
10563 bfd_vma dest, off;
10564 int size;
10565 Elf_Internal_Rela *r;
10566 asection *plt;
10567
10568 /* Massage our args to the form they really have. */
10569 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10570 info = in_arg;
10571
10572 htab = ppc_hash_table (info);
10573 if (htab == NULL)
10574 return FALSE;
10575
10576 /* Make a note of the offset within the stubs for this entry. */
10577 stub_entry->stub_offset = stub_entry->stub_sec->size;
10578 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10579
10580 htab->stub_count[stub_entry->stub_type - 1] += 1;
10581 switch (stub_entry->stub_type)
10582 {
10583 case ppc_stub_long_branch:
10584 case ppc_stub_long_branch_r2off:
10585 /* Branches are relative. This is where we are going to. */
10586 dest = (stub_entry->target_value
10587 + stub_entry->target_section->output_offset
10588 + stub_entry->target_section->output_section->vma);
10589 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10590 off = dest;
10591
10592 /* And this is where we are coming from. */
10593 off -= (stub_entry->stub_offset
10594 + stub_entry->stub_sec->output_offset
10595 + stub_entry->stub_sec->output_section->vma);
10596
10597 size = 4;
10598 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10599 {
10600 bfd_vma r2off = get_r2off (info, stub_entry);
10601
10602 if (r2off == 0)
10603 {
10604 htab->stub_error = TRUE;
10605 return FALSE;
10606 }
10607 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10608 loc += 4;
10609 size = 12;
10610 if (PPC_HA (r2off) != 0)
10611 {
10612 size = 16;
10613 bfd_put_32 (htab->params->stub_bfd,
10614 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10615 loc += 4;
10616 }
10617 bfd_put_32 (htab->params->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10618 loc += 4;
10619 off -= size - 4;
10620 }
10621 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10622
10623 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10624 {
10625 info->callbacks->einfo
10626 (_("%P: long branch stub `%s' offset overflow\n"),
10627 stub_entry->root.string);
10628 htab->stub_error = TRUE;
10629 return FALSE;
10630 }
10631
10632 if (info->emitrelocations)
10633 {
10634 r = get_relocs (stub_entry->stub_sec, 1);
10635 if (r == NULL)
10636 return FALSE;
10637 r->r_offset = loc - stub_entry->stub_sec->contents;
10638 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10639 r->r_addend = dest;
10640 if (stub_entry->h != NULL)
10641 {
10642 struct elf_link_hash_entry **hashes;
10643 unsigned long symndx;
10644 struct ppc_link_hash_entry *h;
10645
10646 hashes = elf_sym_hashes (htab->params->stub_bfd);
10647 if (hashes == NULL)
10648 {
10649 bfd_size_type hsize;
10650
10651 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10652 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10653 if (hashes == NULL)
10654 return FALSE;
10655 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10656 htab->stub_globals = 1;
10657 }
10658 symndx = htab->stub_globals++;
10659 h = stub_entry->h;
10660 hashes[symndx] = &h->elf;
10661 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10662 if (h->oh != NULL && h->oh->is_func)
10663 h = ppc_follow_link (h->oh);
10664 if (h->elf.root.u.def.section != stub_entry->target_section)
10665 /* H is an opd symbol. The addend must be zero. */
10666 r->r_addend = 0;
10667 else
10668 {
10669 off = (h->elf.root.u.def.value
10670 + h->elf.root.u.def.section->output_offset
10671 + h->elf.root.u.def.section->output_section->vma);
10672 r->r_addend -= off;
10673 }
10674 }
10675 }
10676 break;
10677
10678 case ppc_stub_plt_branch:
10679 case ppc_stub_plt_branch_r2off:
10680 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10681 stub_entry->root.string + 9,
10682 FALSE, FALSE);
10683 if (br_entry == NULL)
10684 {
10685 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10686 stub_entry->root.string);
10687 htab->stub_error = TRUE;
10688 return FALSE;
10689 }
10690
10691 dest = (stub_entry->target_value
10692 + stub_entry->target_section->output_offset
10693 + stub_entry->target_section->output_section->vma);
10694 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10695 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10696
10697 bfd_put_64 (htab->brlt->owner, dest,
10698 htab->brlt->contents + br_entry->offset);
10699
10700 if (br_entry->iter == htab->stub_iteration)
10701 {
10702 br_entry->iter = 0;
10703
10704 if (htab->relbrlt != NULL)
10705 {
10706 /* Create a reloc for the branch lookup table entry. */
10707 Elf_Internal_Rela rela;
10708 bfd_byte *rl;
10709
10710 rela.r_offset = (br_entry->offset
10711 + htab->brlt->output_offset
10712 + htab->brlt->output_section->vma);
10713 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10714 rela.r_addend = dest;
10715
10716 rl = htab->relbrlt->contents;
10717 rl += (htab->relbrlt->reloc_count++
10718 * sizeof (Elf64_External_Rela));
10719 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10720 }
10721 else if (info->emitrelocations)
10722 {
10723 r = get_relocs (htab->brlt, 1);
10724 if (r == NULL)
10725 return FALSE;
10726 /* brlt, being SEC_LINKER_CREATED does not go through the
10727 normal reloc processing. Symbols and offsets are not
10728 translated from input file to output file form, so
10729 set up the offset per the output file. */
10730 r->r_offset = (br_entry->offset
10731 + htab->brlt->output_offset
10732 + htab->brlt->output_section->vma);
10733 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10734 r->r_addend = dest;
10735 }
10736 }
10737
10738 dest = (br_entry->offset
10739 + htab->brlt->output_offset
10740 + htab->brlt->output_section->vma);
10741
10742 off = (dest
10743 - elf_gp (htab->brlt->output_section->owner)
10744 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10745
10746 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10747 {
10748 info->callbacks->einfo
10749 (_("%P: linkage table error against `%T'\n"),
10750 stub_entry->root.string);
10751 bfd_set_error (bfd_error_bad_value);
10752 htab->stub_error = TRUE;
10753 return FALSE;
10754 }
10755
10756 if (info->emitrelocations)
10757 {
10758 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10759 if (r == NULL)
10760 return FALSE;
10761 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10762 if (bfd_big_endian (info->output_bfd))
10763 r[0].r_offset += 2;
10764 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10765 r[0].r_offset += 4;
10766 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10767 r[0].r_addend = dest;
10768 if (PPC_HA (off) != 0)
10769 {
10770 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10771 r[1].r_offset = r[0].r_offset + 4;
10772 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10773 r[1].r_addend = r[0].r_addend;
10774 }
10775 }
10776
10777 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10778 {
10779 if (PPC_HA (off) != 0)
10780 {
10781 size = 16;
10782 bfd_put_32 (htab->params->stub_bfd,
10783 ADDIS_R12_R2 | PPC_HA (off), loc);
10784 loc += 4;
10785 bfd_put_32 (htab->params->stub_bfd,
10786 LD_R12_0R12 | PPC_LO (off), loc);
10787 }
10788 else
10789 {
10790 size = 12;
10791 bfd_put_32 (htab->params->stub_bfd,
10792 LD_R12_0R2 | PPC_LO (off), loc);
10793 }
10794 }
10795 else
10796 {
10797 bfd_vma r2off = get_r2off (info, stub_entry);
10798
10799 if (r2off == 0 && htab->opd_abi)
10800 {
10801 htab->stub_error = TRUE;
10802 return FALSE;
10803 }
10804
10805 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10806 loc += 4;
10807 size = 16;
10808 if (PPC_HA (off) != 0)
10809 {
10810 size += 4;
10811 bfd_put_32 (htab->params->stub_bfd,
10812 ADDIS_R12_R2 | PPC_HA (off), loc);
10813 loc += 4;
10814 bfd_put_32 (htab->params->stub_bfd,
10815 LD_R12_0R12 | PPC_LO (off), loc);
10816 }
10817 else
10818 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10819
10820 if (PPC_HA (r2off) != 0)
10821 {
10822 size += 4;
10823 loc += 4;
10824 bfd_put_32 (htab->params->stub_bfd,
10825 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10826 }
10827 if (PPC_LO (r2off) != 0)
10828 {
10829 size += 4;
10830 loc += 4;
10831 bfd_put_32 (htab->params->stub_bfd,
10832 ADDI_R2_R2 | PPC_LO (r2off), loc);
10833 }
10834 }
10835 loc += 4;
10836 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10837 loc += 4;
10838 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10839 break;
10840
10841 case ppc_stub_plt_call:
10842 case ppc_stub_plt_call_r2save:
10843 if (stub_entry->h != NULL
10844 && stub_entry->h->is_func_descriptor
10845 && stub_entry->h->oh != NULL)
10846 {
10847 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10848
10849 /* If the old-ABI "dot-symbol" is undefined make it weak so
10850 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10851 FIXME: We used to define the symbol on one of the call
10852 stubs instead, which is why we test symbol section id
10853 against htab->top_id in various places. Likely all
10854 these checks could now disappear. */
10855 if (fh->elf.root.type == bfd_link_hash_undefined)
10856 fh->elf.root.type = bfd_link_hash_undefweak;
10857 /* Stop undo_symbol_twiddle changing it back to undefined. */
10858 fh->was_undefined = 0;
10859 }
10860
10861 /* Now build the stub. */
10862 dest = stub_entry->plt_ent->plt.offset & ~1;
10863 if (dest >= (bfd_vma) -2)
10864 abort ();
10865
10866 plt = htab->elf.splt;
10867 if (!htab->elf.dynamic_sections_created
10868 || stub_entry->h == NULL
10869 || stub_entry->h->elf.dynindx == -1)
10870 plt = htab->elf.iplt;
10871
10872 dest += plt->output_offset + plt->output_section->vma;
10873
10874 if (stub_entry->h == NULL
10875 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10876 {
10877 Elf_Internal_Rela rela;
10878 bfd_byte *rl;
10879
10880 rela.r_offset = dest;
10881 if (htab->opd_abi)
10882 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10883 else
10884 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
10885 rela.r_addend = (stub_entry->target_value
10886 + stub_entry->target_section->output_offset
10887 + stub_entry->target_section->output_section->vma);
10888
10889 rl = (htab->elf.irelplt->contents
10890 + (htab->elf.irelplt->reloc_count++
10891 * sizeof (Elf64_External_Rela)));
10892 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10893 stub_entry->plt_ent->plt.offset |= 1;
10894 }
10895
10896 off = (dest
10897 - elf_gp (plt->output_section->owner)
10898 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10899
10900 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10901 {
10902 info->callbacks->einfo
10903 (_("%P: linkage table error against `%T'\n"),
10904 stub_entry->h != NULL
10905 ? stub_entry->h->elf.root.root.string
10906 : "<local sym>");
10907 bfd_set_error (bfd_error_bad_value);
10908 htab->stub_error = TRUE;
10909 return FALSE;
10910 }
10911
10912 if (htab->params->plt_stub_align != 0)
10913 {
10914 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10915
10916 stub_entry->stub_sec->size += pad;
10917 stub_entry->stub_offset = stub_entry->stub_sec->size;
10918 loc += pad;
10919 }
10920
10921 r = NULL;
10922 if (info->emitrelocations)
10923 {
10924 r = get_relocs (stub_entry->stub_sec,
10925 ((PPC_HA (off) != 0)
10926 + (htab->opd_abi
10927 ? 2 + (htab->params->plt_static_chain
10928 && PPC_HA (off + 16) == PPC_HA (off))
10929 : 1)));
10930 if (r == NULL)
10931 return FALSE;
10932 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10933 if (bfd_big_endian (info->output_bfd))
10934 r[0].r_offset += 2;
10935 r[0].r_addend = dest;
10936 }
10937 if (stub_entry->h != NULL
10938 && (stub_entry->h == htab->tls_get_addr_fd
10939 || stub_entry->h == htab->tls_get_addr)
10940 && !htab->params->no_tls_get_addr_opt)
10941 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10942 else
10943 p = build_plt_stub (htab, stub_entry, loc, off, r);
10944 size = p - loc;
10945 break;
10946
10947 default:
10948 BFD_FAIL ();
10949 return FALSE;
10950 }
10951
10952 stub_entry->stub_sec->size += size;
10953
10954 if (htab->params->emit_stub_syms)
10955 {
10956 struct elf_link_hash_entry *h;
10957 size_t len1, len2;
10958 char *name;
10959 const char *const stub_str[] = { "long_branch",
10960 "long_branch_r2off",
10961 "plt_branch",
10962 "plt_branch_r2off",
10963 "plt_call",
10964 "plt_call" };
10965
10966 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10967 len2 = strlen (stub_entry->root.string);
10968 name = bfd_malloc (len1 + len2 + 2);
10969 if (name == NULL)
10970 return FALSE;
10971 memcpy (name, stub_entry->root.string, 9);
10972 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10973 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10974 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10975 if (h == NULL)
10976 return FALSE;
10977 if (h->root.type == bfd_link_hash_new)
10978 {
10979 h->root.type = bfd_link_hash_defined;
10980 h->root.u.def.section = stub_entry->stub_sec;
10981 h->root.u.def.value = stub_entry->stub_offset;
10982 h->ref_regular = 1;
10983 h->def_regular = 1;
10984 h->ref_regular_nonweak = 1;
10985 h->forced_local = 1;
10986 h->non_elf = 0;
10987 h->root.linker_def = 1;
10988 }
10989 }
10990
10991 return TRUE;
10992 }
10993
10994 /* As above, but don't actually build the stub. Just bump offset so
10995 we know stub section sizes, and select plt_branch stubs where
10996 long_branch stubs won't do. */
10997
10998 static bfd_boolean
10999 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11000 {
11001 struct ppc_stub_hash_entry *stub_entry;
11002 struct bfd_link_info *info;
11003 struct ppc_link_hash_table *htab;
11004 bfd_vma off;
11005 int size;
11006
11007 /* Massage our args to the form they really have. */
11008 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11009 info = in_arg;
11010
11011 htab = ppc_hash_table (info);
11012 if (htab == NULL)
11013 return FALSE;
11014
11015 if (stub_entry->stub_type == ppc_stub_plt_call
11016 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11017 {
11018 asection *plt;
11019 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11020 if (off >= (bfd_vma) -2)
11021 abort ();
11022 plt = htab->elf.splt;
11023 if (!htab->elf.dynamic_sections_created
11024 || stub_entry->h == NULL
11025 || stub_entry->h->elf.dynindx == -1)
11026 plt = htab->elf.iplt;
11027 off += (plt->output_offset
11028 + plt->output_section->vma
11029 - elf_gp (plt->output_section->owner)
11030 - htab->stub_group[stub_entry->id_sec->id].toc_off);
11031
11032 size = plt_stub_size (htab, stub_entry, off);
11033 if (htab->params->plt_stub_align)
11034 size += plt_stub_pad (htab, stub_entry, off);
11035 if (info->emitrelocations)
11036 {
11037 stub_entry->stub_sec->reloc_count
11038 += ((PPC_HA (off) != 0)
11039 + (htab->opd_abi
11040 ? 2 + (htab->params->plt_static_chain
11041 && PPC_HA (off + 16) == PPC_HA (off))
11042 : 1));
11043 stub_entry->stub_sec->flags |= SEC_RELOC;
11044 }
11045 }
11046 else
11047 {
11048 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11049 variants. */
11050 bfd_vma r2off = 0;
11051 bfd_vma local_off = 0;
11052
11053 off = (stub_entry->target_value
11054 + stub_entry->target_section->output_offset
11055 + stub_entry->target_section->output_section->vma);
11056 off -= (stub_entry->stub_sec->size
11057 + stub_entry->stub_sec->output_offset
11058 + stub_entry->stub_sec->output_section->vma);
11059
11060 /* Reset the stub type from the plt variant in case we now
11061 can reach with a shorter stub. */
11062 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11063 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11064
11065 size = 4;
11066 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11067 {
11068 r2off = get_r2off (info, stub_entry);
11069 if (r2off == 0 && htab->opd_abi)
11070 {
11071 htab->stub_error = TRUE;
11072 return FALSE;
11073 }
11074 size = 12;
11075 if (PPC_HA (r2off) != 0)
11076 size = 16;
11077 off -= size - 4;
11078 }
11079
11080 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11081
11082 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11083 Do the same for -R objects without function descriptors. */
11084 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11085 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11086 && r2off == 0))
11087 {
11088 struct ppc_branch_hash_entry *br_entry;
11089
11090 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11091 stub_entry->root.string + 9,
11092 TRUE, FALSE);
11093 if (br_entry == NULL)
11094 {
11095 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11096 stub_entry->root.string);
11097 htab->stub_error = TRUE;
11098 return FALSE;
11099 }
11100
11101 if (br_entry->iter != htab->stub_iteration)
11102 {
11103 br_entry->iter = htab->stub_iteration;
11104 br_entry->offset = htab->brlt->size;
11105 htab->brlt->size += 8;
11106
11107 if (htab->relbrlt != NULL)
11108 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11109 else if (info->emitrelocations)
11110 {
11111 htab->brlt->reloc_count += 1;
11112 htab->brlt->flags |= SEC_RELOC;
11113 }
11114 }
11115
11116 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11117 off = (br_entry->offset
11118 + htab->brlt->output_offset
11119 + htab->brlt->output_section->vma
11120 - elf_gp (htab->brlt->output_section->owner)
11121 - htab->stub_group[stub_entry->id_sec->id].toc_off);
11122
11123 if (info->emitrelocations)
11124 {
11125 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
11126 stub_entry->stub_sec->flags |= SEC_RELOC;
11127 }
11128
11129 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11130 {
11131 size = 12;
11132 if (PPC_HA (off) != 0)
11133 size = 16;
11134 }
11135 else
11136 {
11137 size = 16;
11138 if (PPC_HA (off) != 0)
11139 size += 4;
11140
11141 if (PPC_HA (r2off) != 0)
11142 size += 4;
11143 if (PPC_LO (r2off) != 0)
11144 size += 4;
11145 }
11146 }
11147 else if (info->emitrelocations)
11148 {
11149 stub_entry->stub_sec->reloc_count += 1;
11150 stub_entry->stub_sec->flags |= SEC_RELOC;
11151 }
11152 }
11153
11154 stub_entry->stub_sec->size += size;
11155 return TRUE;
11156 }
11157
11158 /* Set up various things so that we can make a list of input sections
11159 for each output section included in the link. Returns -1 on error,
11160 0 when no stubs will be needed, and 1 on success. */
11161
11162 int
11163 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11164 {
11165 bfd *input_bfd;
11166 unsigned int top_id, top_index, id;
11167 asection *section;
11168 asection **input_list;
11169 bfd_size_type amt;
11170 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11171
11172 if (htab == NULL)
11173 return -1;
11174
11175 /* Find the top input section id. */
11176 for (input_bfd = info->input_bfds, top_id = 3;
11177 input_bfd != NULL;
11178 input_bfd = input_bfd->link.next)
11179 {
11180 for (section = input_bfd->sections;
11181 section != NULL;
11182 section = section->next)
11183 {
11184 if (top_id < section->id)
11185 top_id = section->id;
11186 }
11187 }
11188
11189 htab->top_id = top_id;
11190 amt = sizeof (struct map_stub) * (top_id + 1);
11191 htab->stub_group = bfd_zmalloc (amt);
11192 if (htab->stub_group == NULL)
11193 return -1;
11194
11195 /* Set toc_off for com, und, abs and ind sections. */
11196 for (id = 0; id < 3; id++)
11197 htab->stub_group[id].toc_off = TOC_BASE_OFF;
11198
11199 /* We can't use output_bfd->section_count here to find the top output
11200 section index as some sections may have been removed, and
11201 strip_excluded_output_sections doesn't renumber the indices. */
11202 for (section = info->output_bfd->sections, top_index = 0;
11203 section != NULL;
11204 section = section->next)
11205 {
11206 if (top_index < section->index)
11207 top_index = section->index;
11208 }
11209
11210 htab->top_index = top_index;
11211 amt = sizeof (asection *) * (top_index + 1);
11212 input_list = bfd_zmalloc (amt);
11213 htab->input_list = input_list;
11214 if (input_list == NULL)
11215 return -1;
11216
11217 return 1;
11218 }
11219
11220 /* Set up for first pass at multitoc partitioning. */
11221
11222 void
11223 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11224 {
11225 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11226
11227 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11228 htab->toc_bfd = NULL;
11229 htab->toc_first_sec = NULL;
11230 }
11231
11232 /* The linker repeatedly calls this function for each TOC input section
11233 and linker generated GOT section. Group input bfds such that the toc
11234 within a group is less than 64k in size. */
11235
11236 bfd_boolean
11237 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11238 {
11239 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11240 bfd_vma addr, off, limit;
11241
11242 if (htab == NULL)
11243 return FALSE;
11244
11245 if (!htab->second_toc_pass)
11246 {
11247 /* Keep track of the first .toc or .got section for this input bfd. */
11248 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11249
11250 if (new_bfd)
11251 {
11252 htab->toc_bfd = isec->owner;
11253 htab->toc_first_sec = isec;
11254 }
11255
11256 addr = isec->output_offset + isec->output_section->vma;
11257 off = addr - htab->toc_curr;
11258 limit = 0x80008000;
11259 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11260 limit = 0x10000;
11261 if (off + isec->size > limit)
11262 {
11263 addr = (htab->toc_first_sec->output_offset
11264 + htab->toc_first_sec->output_section->vma);
11265 htab->toc_curr = addr;
11266 htab->toc_curr &= -TOC_BASE_ALIGN;
11267 }
11268
11269 /* toc_curr is the base address of this toc group. Set elf_gp
11270 for the input section to be the offset relative to the
11271 output toc base plus 0x8000. Making the input elf_gp an
11272 offset allows us to move the toc as a whole without
11273 recalculating input elf_gp. */
11274 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11275 off += TOC_BASE_OFF;
11276
11277 /* Die if someone uses a linker script that doesn't keep input
11278 file .toc and .got together. */
11279 if (new_bfd
11280 && elf_gp (isec->owner) != 0
11281 && elf_gp (isec->owner) != off)
11282 return FALSE;
11283
11284 elf_gp (isec->owner) = off;
11285 return TRUE;
11286 }
11287
11288 /* During the second pass toc_first_sec points to the start of
11289 a toc group, and toc_curr is used to track the old elf_gp.
11290 We use toc_bfd to ensure we only look at each bfd once. */
11291 if (htab->toc_bfd == isec->owner)
11292 return TRUE;
11293 htab->toc_bfd = isec->owner;
11294
11295 if (htab->toc_first_sec == NULL
11296 || htab->toc_curr != elf_gp (isec->owner))
11297 {
11298 htab->toc_curr = elf_gp (isec->owner);
11299 htab->toc_first_sec = isec;
11300 }
11301 addr = (htab->toc_first_sec->output_offset
11302 + htab->toc_first_sec->output_section->vma);
11303 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11304 elf_gp (isec->owner) = off;
11305
11306 return TRUE;
11307 }
11308
11309 /* Called via elf_link_hash_traverse to merge GOT entries for global
11310 symbol H. */
11311
11312 static bfd_boolean
11313 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11314 {
11315 if (h->root.type == bfd_link_hash_indirect)
11316 return TRUE;
11317
11318 merge_got_entries (&h->got.glist);
11319
11320 return TRUE;
11321 }
11322
11323 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11324 symbol H. */
11325
11326 static bfd_boolean
11327 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11328 {
11329 struct got_entry *gent;
11330
11331 if (h->root.type == bfd_link_hash_indirect)
11332 return TRUE;
11333
11334 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11335 if (!gent->is_indirect)
11336 allocate_got (h, (struct bfd_link_info *) inf, gent);
11337 return TRUE;
11338 }
11339
11340 /* Called on the first multitoc pass after the last call to
11341 ppc64_elf_next_toc_section. This function removes duplicate GOT
11342 entries. */
11343
11344 bfd_boolean
11345 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11346 {
11347 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11348 struct bfd *ibfd, *ibfd2;
11349 bfd_boolean done_something;
11350
11351 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11352
11353 if (!htab->do_multi_toc)
11354 return FALSE;
11355
11356 /* Merge global sym got entries within a toc group. */
11357 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11358
11359 /* And tlsld_got. */
11360 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11361 {
11362 struct got_entry *ent, *ent2;
11363
11364 if (!is_ppc64_elf (ibfd))
11365 continue;
11366
11367 ent = ppc64_tlsld_got (ibfd);
11368 if (!ent->is_indirect
11369 && ent->got.offset != (bfd_vma) -1)
11370 {
11371 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11372 {
11373 if (!is_ppc64_elf (ibfd2))
11374 continue;
11375
11376 ent2 = ppc64_tlsld_got (ibfd2);
11377 if (!ent2->is_indirect
11378 && ent2->got.offset != (bfd_vma) -1
11379 && elf_gp (ibfd2) == elf_gp (ibfd))
11380 {
11381 ent2->is_indirect = TRUE;
11382 ent2->got.ent = ent;
11383 }
11384 }
11385 }
11386 }
11387
11388 /* Zap sizes of got sections. */
11389 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11390 htab->elf.irelplt->size -= htab->got_reli_size;
11391 htab->got_reli_size = 0;
11392
11393 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11394 {
11395 asection *got, *relgot;
11396
11397 if (!is_ppc64_elf (ibfd))
11398 continue;
11399
11400 got = ppc64_elf_tdata (ibfd)->got;
11401 if (got != NULL)
11402 {
11403 got->rawsize = got->size;
11404 got->size = 0;
11405 relgot = ppc64_elf_tdata (ibfd)->relgot;
11406 relgot->rawsize = relgot->size;
11407 relgot->size = 0;
11408 }
11409 }
11410
11411 /* Now reallocate the got, local syms first. We don't need to
11412 allocate section contents again since we never increase size. */
11413 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11414 {
11415 struct got_entry **lgot_ents;
11416 struct got_entry **end_lgot_ents;
11417 struct plt_entry **local_plt;
11418 struct plt_entry **end_local_plt;
11419 unsigned char *lgot_masks;
11420 bfd_size_type locsymcount;
11421 Elf_Internal_Shdr *symtab_hdr;
11422 asection *s;
11423
11424 if (!is_ppc64_elf (ibfd))
11425 continue;
11426
11427 lgot_ents = elf_local_got_ents (ibfd);
11428 if (!lgot_ents)
11429 continue;
11430
11431 symtab_hdr = &elf_symtab_hdr (ibfd);
11432 locsymcount = symtab_hdr->sh_info;
11433 end_lgot_ents = lgot_ents + locsymcount;
11434 local_plt = (struct plt_entry **) end_lgot_ents;
11435 end_local_plt = local_plt + locsymcount;
11436 lgot_masks = (unsigned char *) end_local_plt;
11437 s = ppc64_elf_tdata (ibfd)->got;
11438 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11439 {
11440 struct got_entry *ent;
11441
11442 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11443 {
11444 unsigned int ent_size = 8;
11445 unsigned int rel_size = sizeof (Elf64_External_Rela);
11446
11447 ent->got.offset = s->size;
11448 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11449 {
11450 ent_size *= 2;
11451 rel_size *= 2;
11452 }
11453 s->size += ent_size;
11454 if ((*lgot_masks & PLT_IFUNC) != 0)
11455 {
11456 htab->elf.irelplt->size += rel_size;
11457 htab->got_reli_size += rel_size;
11458 }
11459 else if (bfd_link_pic (info))
11460 {
11461 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11462 srel->size += rel_size;
11463 }
11464 }
11465 }
11466 }
11467
11468 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11469
11470 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11471 {
11472 struct got_entry *ent;
11473
11474 if (!is_ppc64_elf (ibfd))
11475 continue;
11476
11477 ent = ppc64_tlsld_got (ibfd);
11478 if (!ent->is_indirect
11479 && ent->got.offset != (bfd_vma) -1)
11480 {
11481 asection *s = ppc64_elf_tdata (ibfd)->got;
11482 ent->got.offset = s->size;
11483 s->size += 16;
11484 if (bfd_link_pic (info))
11485 {
11486 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11487 srel->size += sizeof (Elf64_External_Rela);
11488 }
11489 }
11490 }
11491
11492 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11493 if (!done_something)
11494 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11495 {
11496 asection *got;
11497
11498 if (!is_ppc64_elf (ibfd))
11499 continue;
11500
11501 got = ppc64_elf_tdata (ibfd)->got;
11502 if (got != NULL)
11503 {
11504 done_something = got->rawsize != got->size;
11505 if (done_something)
11506 break;
11507 }
11508 }
11509
11510 if (done_something)
11511 (*htab->params->layout_sections_again) ();
11512
11513 /* Set up for second pass over toc sections to recalculate elf_gp
11514 on input sections. */
11515 htab->toc_bfd = NULL;
11516 htab->toc_first_sec = NULL;
11517 htab->second_toc_pass = TRUE;
11518 return done_something;
11519 }
11520
11521 /* Called after second pass of multitoc partitioning. */
11522
11523 void
11524 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11525 {
11526 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11527
11528 /* After the second pass, toc_curr tracks the TOC offset used
11529 for code sections below in ppc64_elf_next_input_section. */
11530 htab->toc_curr = TOC_BASE_OFF;
11531 }
11532
11533 /* No toc references were found in ISEC. If the code in ISEC makes no
11534 calls, then there's no need to use toc adjusting stubs when branching
11535 into ISEC. Actually, indirect calls from ISEC are OK as they will
11536 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11537 needed, and 2 if a cyclical call-graph was found but no other reason
11538 for a stub was detected. If called from the top level, a return of
11539 2 means the same as a return of 0. */
11540
11541 static int
11542 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11543 {
11544 int ret;
11545
11546 /* Mark this section as checked. */
11547 isec->call_check_done = 1;
11548
11549 /* We know none of our code bearing sections will need toc stubs. */
11550 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11551 return 0;
11552
11553 if (isec->size == 0)
11554 return 0;
11555
11556 if (isec->output_section == NULL)
11557 return 0;
11558
11559 ret = 0;
11560 if (isec->reloc_count != 0)
11561 {
11562 Elf_Internal_Rela *relstart, *rel;
11563 Elf_Internal_Sym *local_syms;
11564 struct ppc_link_hash_table *htab;
11565
11566 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11567 info->keep_memory);
11568 if (relstart == NULL)
11569 return -1;
11570
11571 /* Look for branches to outside of this section. */
11572 local_syms = NULL;
11573 htab = ppc_hash_table (info);
11574 if (htab == NULL)
11575 return -1;
11576
11577 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11578 {
11579 enum elf_ppc64_reloc_type r_type;
11580 unsigned long r_symndx;
11581 struct elf_link_hash_entry *h;
11582 struct ppc_link_hash_entry *eh;
11583 Elf_Internal_Sym *sym;
11584 asection *sym_sec;
11585 struct _opd_sec_data *opd;
11586 bfd_vma sym_value;
11587 bfd_vma dest;
11588
11589 r_type = ELF64_R_TYPE (rel->r_info);
11590 if (r_type != R_PPC64_REL24
11591 && r_type != R_PPC64_REL14
11592 && r_type != R_PPC64_REL14_BRTAKEN
11593 && r_type != R_PPC64_REL14_BRNTAKEN)
11594 continue;
11595
11596 r_symndx = ELF64_R_SYM (rel->r_info);
11597 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11598 isec->owner))
11599 {
11600 ret = -1;
11601 break;
11602 }
11603
11604 /* Calls to dynamic lib functions go through a plt call stub
11605 that uses r2. */
11606 eh = (struct ppc_link_hash_entry *) h;
11607 if (eh != NULL
11608 && (eh->elf.plt.plist != NULL
11609 || (eh->oh != NULL
11610 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11611 {
11612 ret = 1;
11613 break;
11614 }
11615
11616 if (sym_sec == NULL)
11617 /* Ignore other undefined symbols. */
11618 continue;
11619
11620 /* Assume branches to other sections not included in the
11621 link need stubs too, to cover -R and absolute syms. */
11622 if (sym_sec->output_section == NULL)
11623 {
11624 ret = 1;
11625 break;
11626 }
11627
11628 if (h == NULL)
11629 sym_value = sym->st_value;
11630 else
11631 {
11632 if (h->root.type != bfd_link_hash_defined
11633 && h->root.type != bfd_link_hash_defweak)
11634 abort ();
11635 sym_value = h->root.u.def.value;
11636 }
11637 sym_value += rel->r_addend;
11638
11639 /* If this branch reloc uses an opd sym, find the code section. */
11640 opd = get_opd_info (sym_sec);
11641 if (opd != NULL)
11642 {
11643 if (h == NULL && opd->adjust != NULL)
11644 {
11645 long adjust;
11646
11647 adjust = opd->adjust[OPD_NDX (sym_value)];
11648 if (adjust == -1)
11649 /* Assume deleted functions won't ever be called. */
11650 continue;
11651 sym_value += adjust;
11652 }
11653
11654 dest = opd_entry_value (sym_sec, sym_value,
11655 &sym_sec, NULL, FALSE);
11656 if (dest == (bfd_vma) -1)
11657 continue;
11658 }
11659 else
11660 dest = (sym_value
11661 + sym_sec->output_offset
11662 + sym_sec->output_section->vma);
11663
11664 /* Ignore branch to self. */
11665 if (sym_sec == isec)
11666 continue;
11667
11668 /* If the called function uses the toc, we need a stub. */
11669 if (sym_sec->has_toc_reloc
11670 || sym_sec->makes_toc_func_call)
11671 {
11672 ret = 1;
11673 break;
11674 }
11675
11676 /* Assume any branch that needs a long branch stub might in fact
11677 need a plt_branch stub. A plt_branch stub uses r2. */
11678 else if (dest - (isec->output_offset
11679 + isec->output_section->vma
11680 + rel->r_offset) + (1 << 25)
11681 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11682 ? h->other
11683 : sym->st_other))
11684 {
11685 ret = 1;
11686 break;
11687 }
11688
11689 /* If calling back to a section in the process of being
11690 tested, we can't say for sure that no toc adjusting stubs
11691 are needed, so don't return zero. */
11692 else if (sym_sec->call_check_in_progress)
11693 ret = 2;
11694
11695 /* Branches to another section that itself doesn't have any TOC
11696 references are OK. Recursively call ourselves to check. */
11697 else if (!sym_sec->call_check_done)
11698 {
11699 int recur;
11700
11701 /* Mark current section as indeterminate, so that other
11702 sections that call back to current won't be marked as
11703 known. */
11704 isec->call_check_in_progress = 1;
11705 recur = toc_adjusting_stub_needed (info, sym_sec);
11706 isec->call_check_in_progress = 0;
11707
11708 if (recur != 0)
11709 {
11710 ret = recur;
11711 if (recur != 2)
11712 break;
11713 }
11714 }
11715 }
11716
11717 if (local_syms != NULL
11718 && (elf_symtab_hdr (isec->owner).contents
11719 != (unsigned char *) local_syms))
11720 free (local_syms);
11721 if (elf_section_data (isec)->relocs != relstart)
11722 free (relstart);
11723 }
11724
11725 if ((ret & 1) == 0
11726 && isec->map_head.s != NULL
11727 && (strcmp (isec->output_section->name, ".init") == 0
11728 || strcmp (isec->output_section->name, ".fini") == 0))
11729 {
11730 if (isec->map_head.s->has_toc_reloc
11731 || isec->map_head.s->makes_toc_func_call)
11732 ret = 1;
11733 else if (!isec->map_head.s->call_check_done)
11734 {
11735 int recur;
11736 isec->call_check_in_progress = 1;
11737 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11738 isec->call_check_in_progress = 0;
11739 if (recur != 0)
11740 ret = recur;
11741 }
11742 }
11743
11744 if (ret == 1)
11745 isec->makes_toc_func_call = 1;
11746
11747 return ret;
11748 }
11749
11750 /* The linker repeatedly calls this function for each input section,
11751 in the order that input sections are linked into output sections.
11752 Build lists of input sections to determine groupings between which
11753 we may insert linker stubs. */
11754
11755 bfd_boolean
11756 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11757 {
11758 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11759
11760 if (htab == NULL)
11761 return FALSE;
11762
11763 if ((isec->output_section->flags & SEC_CODE) != 0
11764 && isec->output_section->index <= htab->top_index)
11765 {
11766 asection **list = htab->input_list + isec->output_section->index;
11767 /* Steal the link_sec pointer for our list. */
11768 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11769 /* This happens to make the list in reverse order,
11770 which is what we want. */
11771 PREV_SEC (isec) = *list;
11772 *list = isec;
11773 }
11774
11775 if (htab->multi_toc_needed)
11776 {
11777 /* Analyse sections that aren't already flagged as needing a
11778 valid toc pointer. Exclude .fixup for the linux kernel.
11779 .fixup contains branches, but only back to the function that
11780 hit an exception. */
11781 if (!(isec->has_toc_reloc
11782 || (isec->flags & SEC_CODE) == 0
11783 || strcmp (isec->name, ".fixup") == 0
11784 || isec->call_check_done))
11785 {
11786 if (toc_adjusting_stub_needed (info, isec) < 0)
11787 return FALSE;
11788 }
11789 /* Make all sections use the TOC assigned for this object file.
11790 This will be wrong for pasted sections; We fix that in
11791 check_pasted_section(). */
11792 if (elf_gp (isec->owner) != 0)
11793 htab->toc_curr = elf_gp (isec->owner);
11794 }
11795
11796 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11797 return TRUE;
11798 }
11799
11800 /* Check that all .init and .fini sections use the same toc, if they
11801 have toc relocs. */
11802
11803 static bfd_boolean
11804 check_pasted_section (struct bfd_link_info *info, const char *name)
11805 {
11806 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11807
11808 if (o != NULL)
11809 {
11810 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11811 bfd_vma toc_off = 0;
11812 asection *i;
11813
11814 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11815 if (i->has_toc_reloc)
11816 {
11817 if (toc_off == 0)
11818 toc_off = htab->stub_group[i->id].toc_off;
11819 else if (toc_off != htab->stub_group[i->id].toc_off)
11820 return FALSE;
11821 }
11822
11823 if (toc_off == 0)
11824 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11825 if (i->makes_toc_func_call)
11826 {
11827 toc_off = htab->stub_group[i->id].toc_off;
11828 break;
11829 }
11830
11831 /* Make sure the whole pasted function uses the same toc offset. */
11832 if (toc_off != 0)
11833 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11834 htab->stub_group[i->id].toc_off = toc_off;
11835 }
11836 return TRUE;
11837 }
11838
11839 bfd_boolean
11840 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11841 {
11842 return (check_pasted_section (info, ".init")
11843 & check_pasted_section (info, ".fini"));
11844 }
11845
11846 /* See whether we can group stub sections together. Grouping stub
11847 sections may result in fewer stubs. More importantly, we need to
11848 put all .init* and .fini* stubs at the beginning of the .init or
11849 .fini output sections respectively, because glibc splits the
11850 _init and _fini functions into multiple parts. Putting a stub in
11851 the middle of a function is not a good idea. */
11852
11853 static void
11854 group_sections (struct ppc_link_hash_table *htab,
11855 bfd_size_type stub_group_size,
11856 bfd_boolean stubs_always_before_branch)
11857 {
11858 asection **list;
11859 bfd_size_type stub14_group_size;
11860 bfd_boolean suppress_size_errors;
11861
11862 suppress_size_errors = FALSE;
11863 stub14_group_size = stub_group_size >> 10;
11864 if (stub_group_size == 1)
11865 {
11866 /* Default values. */
11867 if (stubs_always_before_branch)
11868 {
11869 stub_group_size = 0x1e00000;
11870 stub14_group_size = 0x7800;
11871 }
11872 else
11873 {
11874 stub_group_size = 0x1c00000;
11875 stub14_group_size = 0x7000;
11876 }
11877 suppress_size_errors = TRUE;
11878 }
11879
11880 list = htab->input_list + htab->top_index;
11881 do
11882 {
11883 asection *tail = *list;
11884 while (tail != NULL)
11885 {
11886 asection *curr;
11887 asection *prev;
11888 bfd_size_type total;
11889 bfd_boolean big_sec;
11890 bfd_vma curr_toc;
11891
11892 curr = tail;
11893 total = tail->size;
11894 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11895 && ppc64_elf_section_data (tail)->has_14bit_branch
11896 ? stub14_group_size : stub_group_size);
11897 if (big_sec && !suppress_size_errors)
11898 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11899 tail->owner, tail);
11900 curr_toc = htab->stub_group[tail->id].toc_off;
11901
11902 while ((prev = PREV_SEC (curr)) != NULL
11903 && ((total += curr->output_offset - prev->output_offset)
11904 < (ppc64_elf_section_data (prev) != NULL
11905 && ppc64_elf_section_data (prev)->has_14bit_branch
11906 ? stub14_group_size : stub_group_size))
11907 && htab->stub_group[prev->id].toc_off == curr_toc)
11908 curr = prev;
11909
11910 /* OK, the size from the start of CURR to the end is less
11911 than stub_group_size and thus can be handled by one stub
11912 section. (or the tail section is itself larger than
11913 stub_group_size, in which case we may be toast.) We
11914 should really be keeping track of the total size of stubs
11915 added here, as stubs contribute to the final output
11916 section size. That's a little tricky, and this way will
11917 only break if stubs added make the total size more than
11918 2^25, ie. for the default stub_group_size, if stubs total
11919 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11920 do
11921 {
11922 prev = PREV_SEC (tail);
11923 /* Set up this stub group. */
11924 htab->stub_group[tail->id].link_sec = curr;
11925 }
11926 while (tail != curr && (tail = prev) != NULL);
11927
11928 /* But wait, there's more! Input sections up to stub_group_size
11929 bytes before the stub section can be handled by it too.
11930 Don't do this if we have a really large section after the
11931 stubs, as adding more stubs increases the chance that
11932 branches may not reach into the stub section. */
11933 if (!stubs_always_before_branch && !big_sec)
11934 {
11935 total = 0;
11936 while (prev != NULL
11937 && ((total += tail->output_offset - prev->output_offset)
11938 < (ppc64_elf_section_data (prev) != NULL
11939 && ppc64_elf_section_data (prev)->has_14bit_branch
11940 ? stub14_group_size : stub_group_size))
11941 && htab->stub_group[prev->id].toc_off == curr_toc)
11942 {
11943 tail = prev;
11944 prev = PREV_SEC (tail);
11945 htab->stub_group[tail->id].link_sec = curr;
11946 }
11947 }
11948 tail = prev;
11949 }
11950 }
11951 while (list-- != htab->input_list);
11952 free (htab->input_list);
11953 #undef PREV_SEC
11954 }
11955
11956 static const unsigned char glink_eh_frame_cie[] =
11957 {
11958 0, 0, 0, 16, /* length. */
11959 0, 0, 0, 0, /* id. */
11960 1, /* CIE version. */
11961 'z', 'R', 0, /* Augmentation string. */
11962 4, /* Code alignment. */
11963 0x78, /* Data alignment. */
11964 65, /* RA reg. */
11965 1, /* Augmentation size. */
11966 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11967 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
11968 0, 0, 0, 0
11969 };
11970
11971 /* Stripping output sections is normally done before dynamic section
11972 symbols have been allocated. This function is called later, and
11973 handles cases like htab->brlt which is mapped to its own output
11974 section. */
11975
11976 static void
11977 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11978 {
11979 if (isec->size == 0
11980 && isec->output_section->size == 0
11981 && !(isec->output_section->flags & SEC_KEEP)
11982 && !bfd_section_removed_from_list (info->output_bfd,
11983 isec->output_section)
11984 && elf_section_data (isec->output_section)->dynindx == 0)
11985 {
11986 isec->output_section->flags |= SEC_EXCLUDE;
11987 bfd_section_list_remove (info->output_bfd, isec->output_section);
11988 info->output_bfd->section_count--;
11989 }
11990 }
11991
11992 /* Determine and set the size of the stub section for a final link.
11993
11994 The basic idea here is to examine all the relocations looking for
11995 PC-relative calls to a target that is unreachable with a "bl"
11996 instruction. */
11997
11998 bfd_boolean
11999 ppc64_elf_size_stubs (struct bfd_link_info *info)
12000 {
12001 bfd_size_type stub_group_size;
12002 bfd_boolean stubs_always_before_branch;
12003 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12004
12005 if (htab == NULL)
12006 return FALSE;
12007
12008 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12009 htab->params->plt_thread_safe = 1;
12010 if (!htab->opd_abi)
12011 htab->params->plt_thread_safe = 0;
12012 else if (htab->params->plt_thread_safe == -1)
12013 {
12014 static const char *const thread_starter[] =
12015 {
12016 "pthread_create",
12017 /* libstdc++ */
12018 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12019 /* librt */
12020 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12021 "mq_notify", "create_timer",
12022 /* libanl */
12023 "getaddrinfo_a",
12024 /* libgomp */
12025 "GOMP_parallel",
12026 "GOMP_parallel_start",
12027 "GOMP_parallel_loop_static",
12028 "GOMP_parallel_loop_static_start",
12029 "GOMP_parallel_loop_dynamic",
12030 "GOMP_parallel_loop_dynamic_start",
12031 "GOMP_parallel_loop_guided",
12032 "GOMP_parallel_loop_guided_start",
12033 "GOMP_parallel_loop_runtime",
12034 "GOMP_parallel_loop_runtime_start",
12035 "GOMP_parallel_sections",
12036 "GOMP_parallel_sections_start",
12037 /* libgo */
12038 "__go_go",
12039 };
12040 unsigned i;
12041
12042 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
12043 {
12044 struct elf_link_hash_entry *h;
12045 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12046 FALSE, FALSE, TRUE);
12047 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12048 if (htab->params->plt_thread_safe)
12049 break;
12050 }
12051 }
12052 stubs_always_before_branch = htab->params->group_size < 0;
12053 if (htab->params->group_size < 0)
12054 stub_group_size = -htab->params->group_size;
12055 else
12056 stub_group_size = htab->params->group_size;
12057
12058 group_sections (htab, stub_group_size, stubs_always_before_branch);
12059
12060 while (1)
12061 {
12062 bfd *input_bfd;
12063 unsigned int bfd_indx;
12064 asection *stub_sec;
12065
12066 htab->stub_iteration += 1;
12067
12068 for (input_bfd = info->input_bfds, bfd_indx = 0;
12069 input_bfd != NULL;
12070 input_bfd = input_bfd->link.next, bfd_indx++)
12071 {
12072 Elf_Internal_Shdr *symtab_hdr;
12073 asection *section;
12074 Elf_Internal_Sym *local_syms = NULL;
12075
12076 if (!is_ppc64_elf (input_bfd))
12077 continue;
12078
12079 /* We'll need the symbol table in a second. */
12080 symtab_hdr = &elf_symtab_hdr (input_bfd);
12081 if (symtab_hdr->sh_info == 0)
12082 continue;
12083
12084 /* Walk over each section attached to the input bfd. */
12085 for (section = input_bfd->sections;
12086 section != NULL;
12087 section = section->next)
12088 {
12089 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12090
12091 /* If there aren't any relocs, then there's nothing more
12092 to do. */
12093 if ((section->flags & SEC_RELOC) == 0
12094 || (section->flags & SEC_ALLOC) == 0
12095 || (section->flags & SEC_LOAD) == 0
12096 || (section->flags & SEC_CODE) == 0
12097 || section->reloc_count == 0)
12098 continue;
12099
12100 /* If this section is a link-once section that will be
12101 discarded, then don't create any stubs. */
12102 if (section->output_section == NULL
12103 || section->output_section->owner != info->output_bfd)
12104 continue;
12105
12106 /* Get the relocs. */
12107 internal_relocs
12108 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12109 info->keep_memory);
12110 if (internal_relocs == NULL)
12111 goto error_ret_free_local;
12112
12113 /* Now examine each relocation. */
12114 irela = internal_relocs;
12115 irelaend = irela + section->reloc_count;
12116 for (; irela < irelaend; irela++)
12117 {
12118 enum elf_ppc64_reloc_type r_type;
12119 unsigned int r_indx;
12120 enum ppc_stub_type stub_type;
12121 struct ppc_stub_hash_entry *stub_entry;
12122 asection *sym_sec, *code_sec;
12123 bfd_vma sym_value, code_value;
12124 bfd_vma destination;
12125 unsigned long local_off;
12126 bfd_boolean ok_dest;
12127 struct ppc_link_hash_entry *hash;
12128 struct ppc_link_hash_entry *fdh;
12129 struct elf_link_hash_entry *h;
12130 Elf_Internal_Sym *sym;
12131 char *stub_name;
12132 const asection *id_sec;
12133 struct _opd_sec_data *opd;
12134 struct plt_entry *plt_ent;
12135
12136 r_type = ELF64_R_TYPE (irela->r_info);
12137 r_indx = ELF64_R_SYM (irela->r_info);
12138
12139 if (r_type >= R_PPC64_max)
12140 {
12141 bfd_set_error (bfd_error_bad_value);
12142 goto error_ret_free_internal;
12143 }
12144
12145 /* Only look for stubs on branch instructions. */
12146 if (r_type != R_PPC64_REL24
12147 && r_type != R_PPC64_REL14
12148 && r_type != R_PPC64_REL14_BRTAKEN
12149 && r_type != R_PPC64_REL14_BRNTAKEN)
12150 continue;
12151
12152 /* Now determine the call target, its name, value,
12153 section. */
12154 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12155 r_indx, input_bfd))
12156 goto error_ret_free_internal;
12157 hash = (struct ppc_link_hash_entry *) h;
12158
12159 ok_dest = FALSE;
12160 fdh = NULL;
12161 sym_value = 0;
12162 if (hash == NULL)
12163 {
12164 sym_value = sym->st_value;
12165 ok_dest = TRUE;
12166 }
12167 else if (hash->elf.root.type == bfd_link_hash_defined
12168 || hash->elf.root.type == bfd_link_hash_defweak)
12169 {
12170 sym_value = hash->elf.root.u.def.value;
12171 if (sym_sec->output_section != NULL)
12172 ok_dest = TRUE;
12173 }
12174 else if (hash->elf.root.type == bfd_link_hash_undefweak
12175 || hash->elf.root.type == bfd_link_hash_undefined)
12176 {
12177 /* Recognise an old ABI func code entry sym, and
12178 use the func descriptor sym instead if it is
12179 defined. */
12180 if (hash->elf.root.root.string[0] == '.'
12181 && (fdh = lookup_fdh (hash, htab)) != NULL)
12182 {
12183 if (fdh->elf.root.type == bfd_link_hash_defined
12184 || fdh->elf.root.type == bfd_link_hash_defweak)
12185 {
12186 sym_sec = fdh->elf.root.u.def.section;
12187 sym_value = fdh->elf.root.u.def.value;
12188 if (sym_sec->output_section != NULL)
12189 ok_dest = TRUE;
12190 }
12191 else
12192 fdh = NULL;
12193 }
12194 }
12195 else
12196 {
12197 bfd_set_error (bfd_error_bad_value);
12198 goto error_ret_free_internal;
12199 }
12200
12201 destination = 0;
12202 local_off = 0;
12203 if (ok_dest)
12204 {
12205 sym_value += irela->r_addend;
12206 destination = (sym_value
12207 + sym_sec->output_offset
12208 + sym_sec->output_section->vma);
12209 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12210 ? hash->elf.other
12211 : sym->st_other);
12212 }
12213
12214 code_sec = sym_sec;
12215 code_value = sym_value;
12216 opd = get_opd_info (sym_sec);
12217 if (opd != NULL)
12218 {
12219 bfd_vma dest;
12220
12221 if (hash == NULL && opd->adjust != NULL)
12222 {
12223 long adjust = opd->adjust[OPD_NDX (sym_value)];
12224 if (adjust == -1)
12225 continue;
12226 code_value += adjust;
12227 sym_value += adjust;
12228 }
12229 dest = opd_entry_value (sym_sec, sym_value,
12230 &code_sec, &code_value, FALSE);
12231 if (dest != (bfd_vma) -1)
12232 {
12233 destination = dest;
12234 if (fdh != NULL)
12235 {
12236 /* Fixup old ABI sym to point at code
12237 entry. */
12238 hash->elf.root.type = bfd_link_hash_defweak;
12239 hash->elf.root.u.def.section = code_sec;
12240 hash->elf.root.u.def.value = code_value;
12241 }
12242 }
12243 }
12244
12245 /* Determine what (if any) linker stub is needed. */
12246 plt_ent = NULL;
12247 stub_type = ppc_type_of_stub (section, irela, &hash,
12248 &plt_ent, destination,
12249 local_off);
12250
12251 if (stub_type != ppc_stub_plt_call)
12252 {
12253 /* Check whether we need a TOC adjusting stub.
12254 Since the linker pastes together pieces from
12255 different object files when creating the
12256 _init and _fini functions, it may be that a
12257 call to what looks like a local sym is in
12258 fact a call needing a TOC adjustment. */
12259 if (code_sec != NULL
12260 && code_sec->output_section != NULL
12261 && (htab->stub_group[code_sec->id].toc_off
12262 != htab->stub_group[section->id].toc_off)
12263 && (code_sec->has_toc_reloc
12264 || code_sec->makes_toc_func_call))
12265 stub_type = ppc_stub_long_branch_r2off;
12266 }
12267
12268 if (stub_type == ppc_stub_none)
12269 continue;
12270
12271 /* __tls_get_addr calls might be eliminated. */
12272 if (stub_type != ppc_stub_plt_call
12273 && hash != NULL
12274 && (hash == htab->tls_get_addr
12275 || hash == htab->tls_get_addr_fd)
12276 && section->has_tls_reloc
12277 && irela != internal_relocs)
12278 {
12279 /* Get tls info. */
12280 unsigned char *tls_mask;
12281
12282 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12283 irela - 1, input_bfd))
12284 goto error_ret_free_internal;
12285 if (*tls_mask != 0)
12286 continue;
12287 }
12288
12289 if (stub_type == ppc_stub_plt_call
12290 && irela + 1 < irelaend
12291 && irela[1].r_offset == irela->r_offset + 4
12292 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12293 {
12294 if (!tocsave_find (htab, INSERT,
12295 &local_syms, irela + 1, input_bfd))
12296 goto error_ret_free_internal;
12297 }
12298 else if (stub_type == ppc_stub_plt_call)
12299 stub_type = ppc_stub_plt_call_r2save;
12300
12301 /* Support for grouping stub sections. */
12302 id_sec = htab->stub_group[section->id].link_sec;
12303
12304 /* Get the name of this stub. */
12305 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12306 if (!stub_name)
12307 goto error_ret_free_internal;
12308
12309 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12310 stub_name, FALSE, FALSE);
12311 if (stub_entry != NULL)
12312 {
12313 /* The proper stub has already been created. */
12314 free (stub_name);
12315 if (stub_type == ppc_stub_plt_call_r2save)
12316 stub_entry->stub_type = stub_type;
12317 continue;
12318 }
12319
12320 stub_entry = ppc_add_stub (stub_name, section, info);
12321 if (stub_entry == NULL)
12322 {
12323 free (stub_name);
12324 error_ret_free_internal:
12325 if (elf_section_data (section)->relocs == NULL)
12326 free (internal_relocs);
12327 error_ret_free_local:
12328 if (local_syms != NULL
12329 && (symtab_hdr->contents
12330 != (unsigned char *) local_syms))
12331 free (local_syms);
12332 return FALSE;
12333 }
12334
12335 stub_entry->stub_type = stub_type;
12336 if (stub_type != ppc_stub_plt_call
12337 && stub_type != ppc_stub_plt_call_r2save)
12338 {
12339 stub_entry->target_value = code_value;
12340 stub_entry->target_section = code_sec;
12341 }
12342 else
12343 {
12344 stub_entry->target_value = sym_value;
12345 stub_entry->target_section = sym_sec;
12346 }
12347 stub_entry->h = hash;
12348 stub_entry->plt_ent = plt_ent;
12349 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12350
12351 if (stub_entry->h != NULL)
12352 htab->stub_globals += 1;
12353 }
12354
12355 /* We're done with the internal relocs, free them. */
12356 if (elf_section_data (section)->relocs != internal_relocs)
12357 free (internal_relocs);
12358 }
12359
12360 if (local_syms != NULL
12361 && symtab_hdr->contents != (unsigned char *) local_syms)
12362 {
12363 if (!info->keep_memory)
12364 free (local_syms);
12365 else
12366 symtab_hdr->contents = (unsigned char *) local_syms;
12367 }
12368 }
12369
12370 /* We may have added some stubs. Find out the new size of the
12371 stub sections. */
12372 for (stub_sec = htab->params->stub_bfd->sections;
12373 stub_sec != NULL;
12374 stub_sec = stub_sec->next)
12375 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12376 {
12377 stub_sec->rawsize = stub_sec->size;
12378 stub_sec->size = 0;
12379 stub_sec->reloc_count = 0;
12380 stub_sec->flags &= ~SEC_RELOC;
12381 }
12382
12383 htab->brlt->size = 0;
12384 htab->brlt->reloc_count = 0;
12385 htab->brlt->flags &= ~SEC_RELOC;
12386 if (htab->relbrlt != NULL)
12387 htab->relbrlt->size = 0;
12388
12389 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12390
12391 if (info->emitrelocations
12392 && htab->glink != NULL && htab->glink->size != 0)
12393 {
12394 htab->glink->reloc_count = 1;
12395 htab->glink->flags |= SEC_RELOC;
12396 }
12397
12398 if (htab->glink_eh_frame != NULL
12399 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12400 && htab->glink_eh_frame->output_section->size != 0)
12401 {
12402 size_t size = 0, align;
12403
12404 for (stub_sec = htab->params->stub_bfd->sections;
12405 stub_sec != NULL;
12406 stub_sec = stub_sec->next)
12407 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12408 size += 24;
12409 if (htab->glink != NULL && htab->glink->size != 0)
12410 size += 24;
12411 if (size != 0)
12412 size += sizeof (glink_eh_frame_cie);
12413 align = 1;
12414 align <<= htab->glink_eh_frame->output_section->alignment_power;
12415 align -= 1;
12416 size = (size + align) & ~align;
12417 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12418 htab->glink_eh_frame->size = size;
12419 }
12420
12421 if (htab->params->plt_stub_align != 0)
12422 for (stub_sec = htab->params->stub_bfd->sections;
12423 stub_sec != NULL;
12424 stub_sec = stub_sec->next)
12425 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12426 stub_sec->size = ((stub_sec->size
12427 + (1 << htab->params->plt_stub_align) - 1)
12428 & (-1 << htab->params->plt_stub_align));
12429
12430 for (stub_sec = htab->params->stub_bfd->sections;
12431 stub_sec != NULL;
12432 stub_sec = stub_sec->next)
12433 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12434 && stub_sec->rawsize != stub_sec->size)
12435 break;
12436
12437 /* Exit from this loop when no stubs have been added, and no stubs
12438 have changed size. */
12439 if (stub_sec == NULL
12440 && (htab->glink_eh_frame == NULL
12441 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12442 break;
12443
12444 /* Ask the linker to do its stuff. */
12445 (*htab->params->layout_sections_again) ();
12446 }
12447
12448 if (htab->glink_eh_frame != NULL
12449 && htab->glink_eh_frame->size != 0)
12450 {
12451 bfd_vma val;
12452 bfd_byte *p, *last_fde;
12453 size_t last_fde_len, size, align, pad;
12454 asection *stub_sec;
12455
12456 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12457 if (p == NULL)
12458 return FALSE;
12459 htab->glink_eh_frame->contents = p;
12460 last_fde = p;
12461
12462 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12463 /* CIE length (rewrite in case little-endian). */
12464 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12465 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12466 p += sizeof (glink_eh_frame_cie);
12467
12468 for (stub_sec = htab->params->stub_bfd->sections;
12469 stub_sec != NULL;
12470 stub_sec = stub_sec->next)
12471 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12472 {
12473 last_fde = p;
12474 last_fde_len = 20;
12475 /* FDE length. */
12476 bfd_put_32 (htab->elf.dynobj, 20, p);
12477 p += 4;
12478 /* CIE pointer. */
12479 val = p - htab->glink_eh_frame->contents;
12480 bfd_put_32 (htab->elf.dynobj, val, p);
12481 p += 4;
12482 /* Offset to stub section, written later. */
12483 p += 4;
12484 /* stub section size. */
12485 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12486 p += 4;
12487 /* Augmentation. */
12488 p += 1;
12489 /* Pad. */
12490 p += 7;
12491 }
12492 if (htab->glink != NULL && htab->glink->size != 0)
12493 {
12494 last_fde = p;
12495 last_fde_len = 20;
12496 /* FDE length. */
12497 bfd_put_32 (htab->elf.dynobj, 20, p);
12498 p += 4;
12499 /* CIE pointer. */
12500 val = p - htab->glink_eh_frame->contents;
12501 bfd_put_32 (htab->elf.dynobj, val, p);
12502 p += 4;
12503 /* Offset to .glink, written later. */
12504 p += 4;
12505 /* .glink size. */
12506 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12507 p += 4;
12508 /* Augmentation. */
12509 p += 1;
12510
12511 *p++ = DW_CFA_advance_loc + 1;
12512 *p++ = DW_CFA_register;
12513 *p++ = 65;
12514 *p++ = 12;
12515 *p++ = DW_CFA_advance_loc + 4;
12516 *p++ = DW_CFA_restore_extended;
12517 *p++ = 65;
12518 }
12519 /* Subsume any padding into the last FDE if user .eh_frame
12520 sections are aligned more than glink_eh_frame. Otherwise any
12521 zero padding will be seen as a terminator. */
12522 size = p - htab->glink_eh_frame->contents;
12523 align = 1;
12524 align <<= htab->glink_eh_frame->output_section->alignment_power;
12525 align -= 1;
12526 pad = ((size + align) & ~align) - size;
12527 htab->glink_eh_frame->size = size + pad;
12528 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12529 }
12530
12531 maybe_strip_output (info, htab->brlt);
12532 if (htab->glink_eh_frame != NULL)
12533 maybe_strip_output (info, htab->glink_eh_frame);
12534
12535 return TRUE;
12536 }
12537
12538 /* Called after we have determined section placement. If sections
12539 move, we'll be called again. Provide a value for TOCstart. */
12540
12541 bfd_vma
12542 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12543 {
12544 asection *s;
12545 bfd_vma TOCstart, adjust;
12546
12547 if (info != NULL)
12548 {
12549 struct elf_link_hash_entry *h;
12550 struct elf_link_hash_table *htab = elf_hash_table (info);
12551
12552 if (is_elf_hash_table (htab)
12553 && htab->hgot != NULL)
12554 h = htab->hgot;
12555 else
12556 {
12557 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12558 if (is_elf_hash_table (htab))
12559 htab->hgot = h;
12560 }
12561 if (h != NULL
12562 && h->root.type == bfd_link_hash_defined
12563 && !h->root.linker_def
12564 && (!is_elf_hash_table (htab)
12565 || h->def_regular))
12566 {
12567 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12568 + h->root.u.def.section->output_offset
12569 + h->root.u.def.section->output_section->vma);
12570 _bfd_set_gp_value (obfd, TOCstart);
12571 return TOCstart;
12572 }
12573 }
12574
12575 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12576 order. The TOC starts where the first of these sections starts. */
12577 s = bfd_get_section_by_name (obfd, ".got");
12578 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12579 s = bfd_get_section_by_name (obfd, ".toc");
12580 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12581 s = bfd_get_section_by_name (obfd, ".tocbss");
12582 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12583 s = bfd_get_section_by_name (obfd, ".plt");
12584 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12585 {
12586 /* This may happen for
12587 o references to TOC base (SYM@toc / TOC[tc0]) without a
12588 .toc directive
12589 o bad linker script
12590 o --gc-sections and empty TOC sections
12591
12592 FIXME: Warn user? */
12593
12594 /* Look for a likely section. We probably won't even be
12595 using TOCstart. */
12596 for (s = obfd->sections; s != NULL; s = s->next)
12597 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12598 | SEC_EXCLUDE))
12599 == (SEC_ALLOC | SEC_SMALL_DATA))
12600 break;
12601 if (s == NULL)
12602 for (s = obfd->sections; s != NULL; s = s->next)
12603 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12604 == (SEC_ALLOC | SEC_SMALL_DATA))
12605 break;
12606 if (s == NULL)
12607 for (s = obfd->sections; s != NULL; s = s->next)
12608 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12609 == SEC_ALLOC)
12610 break;
12611 if (s == NULL)
12612 for (s = obfd->sections; s != NULL; s = s->next)
12613 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12614 break;
12615 }
12616
12617 TOCstart = 0;
12618 if (s != NULL)
12619 TOCstart = s->output_section->vma + s->output_offset;
12620
12621 /* Force alignment. */
12622 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12623 TOCstart -= adjust;
12624 _bfd_set_gp_value (obfd, TOCstart);
12625
12626 if (info != NULL && s != NULL)
12627 {
12628 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12629
12630 if (htab != NULL)
12631 {
12632 if (htab->elf.hgot != NULL)
12633 {
12634 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12635 htab->elf.hgot->root.u.def.section = s;
12636 }
12637 }
12638 else
12639 {
12640 struct bfd_link_hash_entry *bh = NULL;
12641 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12642 s, TOC_BASE_OFF - adjust,
12643 NULL, FALSE, FALSE, &bh);
12644 }
12645 }
12646 return TOCstart;
12647 }
12648
12649 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12650 write out any global entry stubs. */
12651
12652 static bfd_boolean
12653 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12654 {
12655 struct bfd_link_info *info;
12656 struct ppc_link_hash_table *htab;
12657 struct plt_entry *pent;
12658 asection *s;
12659
12660 if (h->root.type == bfd_link_hash_indirect)
12661 return TRUE;
12662
12663 if (!h->pointer_equality_needed)
12664 return TRUE;
12665
12666 if (h->def_regular)
12667 return TRUE;
12668
12669 info = inf;
12670 htab = ppc_hash_table (info);
12671 if (htab == NULL)
12672 return FALSE;
12673
12674 s = htab->glink;
12675 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12676 if (pent->plt.offset != (bfd_vma) -1
12677 && pent->addend == 0)
12678 {
12679 bfd_byte *p;
12680 asection *plt;
12681 bfd_vma off;
12682
12683 p = s->contents + h->root.u.def.value;
12684 plt = htab->elf.splt;
12685 if (!htab->elf.dynamic_sections_created
12686 || h->dynindx == -1)
12687 plt = htab->elf.iplt;
12688 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12689 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12690
12691 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12692 {
12693 info->callbacks->einfo
12694 (_("%P: linkage table error against `%T'\n"),
12695 h->root.root.string);
12696 bfd_set_error (bfd_error_bad_value);
12697 htab->stub_error = TRUE;
12698 }
12699
12700 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12701 if (htab->params->emit_stub_syms)
12702 {
12703 size_t len = strlen (h->root.root.string);
12704 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12705
12706 if (name == NULL)
12707 return FALSE;
12708
12709 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12710 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12711 if (h == NULL)
12712 return FALSE;
12713 if (h->root.type == bfd_link_hash_new)
12714 {
12715 h->root.type = bfd_link_hash_defined;
12716 h->root.u.def.section = s;
12717 h->root.u.def.value = p - s->contents;
12718 h->ref_regular = 1;
12719 h->def_regular = 1;
12720 h->ref_regular_nonweak = 1;
12721 h->forced_local = 1;
12722 h->non_elf = 0;
12723 h->root.linker_def = 1;
12724 }
12725 }
12726
12727 if (PPC_HA (off) != 0)
12728 {
12729 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12730 p += 4;
12731 }
12732 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12733 p += 4;
12734 bfd_put_32 (s->owner, MTCTR_R12, p);
12735 p += 4;
12736 bfd_put_32 (s->owner, BCTR, p);
12737 break;
12738 }
12739 return TRUE;
12740 }
12741
12742 /* Build all the stubs associated with the current output file.
12743 The stubs are kept in a hash table attached to the main linker
12744 hash table. This function is called via gldelf64ppc_finish. */
12745
12746 bfd_boolean
12747 ppc64_elf_build_stubs (struct bfd_link_info *info,
12748 char **stats)
12749 {
12750 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12751 asection *stub_sec;
12752 bfd_byte *p;
12753 int stub_sec_count = 0;
12754
12755 if (htab == NULL)
12756 return FALSE;
12757
12758 /* Allocate memory to hold the linker stubs. */
12759 for (stub_sec = htab->params->stub_bfd->sections;
12760 stub_sec != NULL;
12761 stub_sec = stub_sec->next)
12762 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12763 && stub_sec->size != 0)
12764 {
12765 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12766 if (stub_sec->contents == NULL)
12767 return FALSE;
12768 /* We want to check that built size is the same as calculated
12769 size. rawsize is a convenient location to use. */
12770 stub_sec->rawsize = stub_sec->size;
12771 stub_sec->size = 0;
12772 }
12773
12774 if (htab->glink != NULL && htab->glink->size != 0)
12775 {
12776 unsigned int indx;
12777 bfd_vma plt0;
12778
12779 /* Build the .glink plt call stub. */
12780 if (htab->params->emit_stub_syms)
12781 {
12782 struct elf_link_hash_entry *h;
12783 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12784 TRUE, FALSE, FALSE);
12785 if (h == NULL)
12786 return FALSE;
12787 if (h->root.type == bfd_link_hash_new)
12788 {
12789 h->root.type = bfd_link_hash_defined;
12790 h->root.u.def.section = htab->glink;
12791 h->root.u.def.value = 8;
12792 h->ref_regular = 1;
12793 h->def_regular = 1;
12794 h->ref_regular_nonweak = 1;
12795 h->forced_local = 1;
12796 h->non_elf = 0;
12797 h->root.linker_def = 1;
12798 }
12799 }
12800 plt0 = (htab->elf.splt->output_section->vma
12801 + htab->elf.splt->output_offset
12802 - 16);
12803 if (info->emitrelocations)
12804 {
12805 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12806 if (r == NULL)
12807 return FALSE;
12808 r->r_offset = (htab->glink->output_offset
12809 + htab->glink->output_section->vma);
12810 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12811 r->r_addend = plt0;
12812 }
12813 p = htab->glink->contents;
12814 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12815 bfd_put_64 (htab->glink->owner, plt0, p);
12816 p += 8;
12817 if (htab->opd_abi)
12818 {
12819 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12820 p += 4;
12821 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12822 p += 4;
12823 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12824 p += 4;
12825 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12826 p += 4;
12827 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12828 p += 4;
12829 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12830 p += 4;
12831 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12832 p += 4;
12833 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12834 p += 4;
12835 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12836 p += 4;
12837 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12838 p += 4;
12839 }
12840 else
12841 {
12842 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12843 p += 4;
12844 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12845 p += 4;
12846 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12847 p += 4;
12848 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12849 p += 4;
12850 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12851 p += 4;
12852 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
12853 p += 4;
12854 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12855 p += 4;
12856 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
12857 p += 4;
12858 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12859 p += 4;
12860 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
12861 p += 4;
12862 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12863 p += 4;
12864 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
12865 p += 4;
12866 }
12867 bfd_put_32 (htab->glink->owner, BCTR, p);
12868 p += 4;
12869 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12870 {
12871 bfd_put_32 (htab->glink->owner, NOP, p);
12872 p += 4;
12873 }
12874
12875 /* Build the .glink lazy link call stubs. */
12876 indx = 0;
12877 while (p < htab->glink->contents + htab->glink->rawsize)
12878 {
12879 if (htab->opd_abi)
12880 {
12881 if (indx < 0x8000)
12882 {
12883 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12884 p += 4;
12885 }
12886 else
12887 {
12888 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12889 p += 4;
12890 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
12891 p);
12892 p += 4;
12893 }
12894 }
12895 bfd_put_32 (htab->glink->owner,
12896 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12897 indx++;
12898 p += 4;
12899 }
12900
12901 /* Build .glink global entry stubs. */
12902 if (htab->glink->size > htab->glink->rawsize)
12903 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
12904 }
12905
12906 if (htab->brlt != NULL && htab->brlt->size != 0)
12907 {
12908 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12909 htab->brlt->size);
12910 if (htab->brlt->contents == NULL)
12911 return FALSE;
12912 }
12913 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12914 {
12915 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12916 htab->relbrlt->size);
12917 if (htab->relbrlt->contents == NULL)
12918 return FALSE;
12919 }
12920
12921 /* Build the stubs as directed by the stub hash table. */
12922 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12923
12924 if (htab->relbrlt != NULL)
12925 htab->relbrlt->reloc_count = 0;
12926
12927 if (htab->params->plt_stub_align != 0)
12928 for (stub_sec = htab->params->stub_bfd->sections;
12929 stub_sec != NULL;
12930 stub_sec = stub_sec->next)
12931 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12932 stub_sec->size = ((stub_sec->size
12933 + (1 << htab->params->plt_stub_align) - 1)
12934 & (-1 << htab->params->plt_stub_align));
12935
12936 for (stub_sec = htab->params->stub_bfd->sections;
12937 stub_sec != NULL;
12938 stub_sec = stub_sec->next)
12939 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12940 {
12941 stub_sec_count += 1;
12942 if (stub_sec->rawsize != stub_sec->size)
12943 break;
12944 }
12945
12946 /* Note that the glink_eh_frame check here is not only testing that
12947 the generated size matched the calculated size but also that
12948 bfd_elf_discard_info didn't make any changes to the section. */
12949 if (stub_sec != NULL
12950 || (htab->glink_eh_frame != NULL
12951 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12952 {
12953 htab->stub_error = TRUE;
12954 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12955 }
12956
12957 if (htab->stub_error)
12958 return FALSE;
12959
12960 if (stats != NULL)
12961 {
12962 *stats = bfd_malloc (500);
12963 if (*stats == NULL)
12964 return FALSE;
12965
12966 sprintf (*stats, _("linker stubs in %u group%s\n"
12967 " branch %lu\n"
12968 " toc adjust %lu\n"
12969 " long branch %lu\n"
12970 " long toc adj %lu\n"
12971 " plt call %lu\n"
12972 " plt call toc %lu\n"
12973 " global entry %lu"),
12974 stub_sec_count,
12975 stub_sec_count == 1 ? "" : "s",
12976 htab->stub_count[ppc_stub_long_branch - 1],
12977 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12978 htab->stub_count[ppc_stub_plt_branch - 1],
12979 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12980 htab->stub_count[ppc_stub_plt_call - 1],
12981 htab->stub_count[ppc_stub_plt_call_r2save - 1],
12982 htab->stub_count[ppc_stub_global_entry - 1]);
12983 }
12984 return TRUE;
12985 }
12986
12987 /* This function undoes the changes made by add_symbol_adjust. */
12988
12989 static bfd_boolean
12990 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12991 {
12992 struct ppc_link_hash_entry *eh;
12993
12994 if (h->root.type == bfd_link_hash_indirect)
12995 return TRUE;
12996
12997 eh = (struct ppc_link_hash_entry *) h;
12998 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12999 return TRUE;
13000
13001 eh->elf.root.type = bfd_link_hash_undefined;
13002 return TRUE;
13003 }
13004
13005 void
13006 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13007 {
13008 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13009
13010 if (htab != NULL)
13011 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13012 }
13013
13014 /* What to do when ld finds relocations against symbols defined in
13015 discarded sections. */
13016
13017 static unsigned int
13018 ppc64_elf_action_discarded (asection *sec)
13019 {
13020 if (strcmp (".opd", sec->name) == 0)
13021 return 0;
13022
13023 if (strcmp (".toc", sec->name) == 0)
13024 return 0;
13025
13026 if (strcmp (".toc1", sec->name) == 0)
13027 return 0;
13028
13029 return _bfd_elf_default_action_discarded (sec);
13030 }
13031
13032 /* The RELOCATE_SECTION function is called by the ELF backend linker
13033 to handle the relocations for a section.
13034
13035 The relocs are always passed as Rela structures; if the section
13036 actually uses Rel structures, the r_addend field will always be
13037 zero.
13038
13039 This function is responsible for adjust the section contents as
13040 necessary, and (if using Rela relocs and generating a
13041 relocatable output file) adjusting the reloc addend as
13042 necessary.
13043
13044 This function does not have to worry about setting the reloc
13045 address or the reloc symbol index.
13046
13047 LOCAL_SYMS is a pointer to the swapped in local symbols.
13048
13049 LOCAL_SECTIONS is an array giving the section in the input file
13050 corresponding to the st_shndx field of each local symbol.
13051
13052 The global hash table entry for the global symbols can be found
13053 via elf_sym_hashes (input_bfd).
13054
13055 When generating relocatable output, this function must handle
13056 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13057 going to be the section symbol corresponding to the output
13058 section, which means that the addend must be adjusted
13059 accordingly. */
13060
13061 static bfd_boolean
13062 ppc64_elf_relocate_section (bfd *output_bfd,
13063 struct bfd_link_info *info,
13064 bfd *input_bfd,
13065 asection *input_section,
13066 bfd_byte *contents,
13067 Elf_Internal_Rela *relocs,
13068 Elf_Internal_Sym *local_syms,
13069 asection **local_sections)
13070 {
13071 struct ppc_link_hash_table *htab;
13072 Elf_Internal_Shdr *symtab_hdr;
13073 struct elf_link_hash_entry **sym_hashes;
13074 Elf_Internal_Rela *rel;
13075 Elf_Internal_Rela *relend;
13076 Elf_Internal_Rela outrel;
13077 bfd_byte *loc;
13078 struct got_entry **local_got_ents;
13079 bfd_vma TOCstart;
13080 bfd_boolean ret = TRUE;
13081 bfd_boolean is_opd;
13082 /* Assume 'at' branch hints. */
13083 bfd_boolean is_isa_v2 = TRUE;
13084 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13085
13086 /* Initialize howto table if needed. */
13087 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13088 ppc_howto_init ();
13089
13090 htab = ppc_hash_table (info);
13091 if (htab == NULL)
13092 return FALSE;
13093
13094 /* Don't relocate stub sections. */
13095 if (input_section->owner == htab->params->stub_bfd)
13096 return TRUE;
13097
13098 BFD_ASSERT (is_ppc64_elf (input_bfd));
13099
13100 local_got_ents = elf_local_got_ents (input_bfd);
13101 TOCstart = elf_gp (output_bfd);
13102 symtab_hdr = &elf_symtab_hdr (input_bfd);
13103 sym_hashes = elf_sym_hashes (input_bfd);
13104 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13105
13106 rel = relocs;
13107 relend = relocs + input_section->reloc_count;
13108 for (; rel < relend; rel++)
13109 {
13110 enum elf_ppc64_reloc_type r_type;
13111 bfd_vma addend;
13112 bfd_reloc_status_type r;
13113 Elf_Internal_Sym *sym;
13114 asection *sec;
13115 struct elf_link_hash_entry *h_elf;
13116 struct ppc_link_hash_entry *h;
13117 struct ppc_link_hash_entry *fdh;
13118 const char *sym_name;
13119 unsigned long r_symndx, toc_symndx;
13120 bfd_vma toc_addend;
13121 unsigned char tls_mask, tls_gd, tls_type;
13122 unsigned char sym_type;
13123 bfd_vma relocation;
13124 bfd_boolean unresolved_reloc;
13125 bfd_boolean warned;
13126 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13127 unsigned int insn;
13128 unsigned int mask;
13129 struct ppc_stub_hash_entry *stub_entry;
13130 bfd_vma max_br_offset;
13131 bfd_vma from;
13132 const Elf_Internal_Rela orig_rel = *rel;
13133 reloc_howto_type *howto;
13134 struct reloc_howto_struct alt_howto;
13135
13136 r_type = ELF64_R_TYPE (rel->r_info);
13137 r_symndx = ELF64_R_SYM (rel->r_info);
13138
13139 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13140 symbol of the previous ADDR64 reloc. The symbol gives us the
13141 proper TOC base to use. */
13142 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13143 && rel != relocs
13144 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
13145 && is_opd)
13146 r_symndx = ELF64_R_SYM (rel[-1].r_info);
13147
13148 sym = NULL;
13149 sec = NULL;
13150 h_elf = NULL;
13151 sym_name = NULL;
13152 unresolved_reloc = FALSE;
13153 warned = FALSE;
13154
13155 if (r_symndx < symtab_hdr->sh_info)
13156 {
13157 /* It's a local symbol. */
13158 struct _opd_sec_data *opd;
13159
13160 sym = local_syms + r_symndx;
13161 sec = local_sections[r_symndx];
13162 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13163 sym_type = ELF64_ST_TYPE (sym->st_info);
13164 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13165 opd = get_opd_info (sec);
13166 if (opd != NULL && opd->adjust != NULL)
13167 {
13168 long adjust = opd->adjust[OPD_NDX (sym->st_value
13169 + rel->r_addend)];
13170 if (adjust == -1)
13171 relocation = 0;
13172 else
13173 {
13174 /* If this is a relocation against the opd section sym
13175 and we have edited .opd, adjust the reloc addend so
13176 that ld -r and ld --emit-relocs output is correct.
13177 If it is a reloc against some other .opd symbol,
13178 then the symbol value will be adjusted later. */
13179 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13180 rel->r_addend += adjust;
13181 else
13182 relocation += adjust;
13183 }
13184 }
13185 }
13186 else
13187 {
13188 bfd_boolean ignored;
13189
13190 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13191 r_symndx, symtab_hdr, sym_hashes,
13192 h_elf, sec, relocation,
13193 unresolved_reloc, warned, ignored);
13194 sym_name = h_elf->root.root.string;
13195 sym_type = h_elf->type;
13196 if (sec != NULL
13197 && sec->owner == output_bfd
13198 && strcmp (sec->name, ".opd") == 0)
13199 {
13200 /* This is a symbol defined in a linker script. All
13201 such are defined in output sections, even those
13202 defined by simple assignment from a symbol defined in
13203 an input section. Transfer the symbol to an
13204 appropriate input .opd section, so that a branch to
13205 this symbol will be mapped to the location specified
13206 by the opd entry. */
13207 struct bfd_link_order *lo;
13208 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13209 if (lo->type == bfd_indirect_link_order)
13210 {
13211 asection *isec = lo->u.indirect.section;
13212 if (h_elf->root.u.def.value >= isec->output_offset
13213 && h_elf->root.u.def.value < (isec->output_offset
13214 + isec->size))
13215 {
13216 h_elf->root.u.def.value -= isec->output_offset;
13217 h_elf->root.u.def.section = isec;
13218 sec = isec;
13219 break;
13220 }
13221 }
13222 }
13223 }
13224 h = (struct ppc_link_hash_entry *) h_elf;
13225
13226 if (sec != NULL && discarded_section (sec))
13227 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
13228 rel, 1, relend,
13229 ppc64_elf_howto_table[r_type], 0,
13230 contents);
13231
13232 if (bfd_link_relocatable (info))
13233 continue;
13234
13235 if (h != NULL && &h->elf == htab->elf.hgot)
13236 {
13237 relocation = (TOCstart
13238 + htab->stub_group[input_section->id].toc_off);
13239 sec = bfd_abs_section_ptr;
13240 unresolved_reloc = FALSE;
13241 }
13242
13243 /* TLS optimizations. Replace instruction sequences and relocs
13244 based on information we collected in tls_optimize. We edit
13245 RELOCS so that --emit-relocs will output something sensible
13246 for the final instruction stream. */
13247 tls_mask = 0;
13248 tls_gd = 0;
13249 toc_symndx = 0;
13250 if (h != NULL)
13251 tls_mask = h->tls_mask;
13252 else if (local_got_ents != NULL)
13253 {
13254 struct plt_entry **local_plt = (struct plt_entry **)
13255 (local_got_ents + symtab_hdr->sh_info);
13256 unsigned char *lgot_masks = (unsigned char *)
13257 (local_plt + symtab_hdr->sh_info);
13258 tls_mask = lgot_masks[r_symndx];
13259 }
13260 if (tls_mask == 0
13261 && (r_type == R_PPC64_TLS
13262 || r_type == R_PPC64_TLSGD
13263 || r_type == R_PPC64_TLSLD))
13264 {
13265 /* Check for toc tls entries. */
13266 unsigned char *toc_tls;
13267
13268 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13269 &local_syms, rel, input_bfd))
13270 return FALSE;
13271
13272 if (toc_tls)
13273 tls_mask = *toc_tls;
13274 }
13275
13276 /* Check that tls relocs are used with tls syms, and non-tls
13277 relocs are used with non-tls syms. */
13278 if (r_symndx != STN_UNDEF
13279 && r_type != R_PPC64_NONE
13280 && (h == NULL
13281 || h->elf.root.type == bfd_link_hash_defined
13282 || h->elf.root.type == bfd_link_hash_defweak)
13283 && (IS_PPC64_TLS_RELOC (r_type)
13284 != (sym_type == STT_TLS
13285 || (sym_type == STT_SECTION
13286 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13287 {
13288 if (tls_mask != 0
13289 && (r_type == R_PPC64_TLS
13290 || r_type == R_PPC64_TLSGD
13291 || r_type == R_PPC64_TLSLD))
13292 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13293 ;
13294 else
13295 info->callbacks->einfo
13296 (!IS_PPC64_TLS_RELOC (r_type)
13297 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13298 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13299 input_bfd, input_section, rel->r_offset,
13300 ppc64_elf_howto_table[r_type]->name,
13301 sym_name);
13302 }
13303
13304 /* Ensure reloc mapping code below stays sane. */
13305 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13306 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13307 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13308 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13309 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13310 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13311 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13312 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13313 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13314 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13315 abort ();
13316
13317 switch (r_type)
13318 {
13319 default:
13320 break;
13321
13322 case R_PPC64_LO_DS_OPT:
13323 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13324 if ((insn & (0x3f << 26)) != 58u << 26)
13325 abort ();
13326 insn += (14u << 26) - (58u << 26);
13327 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13328 r_type = R_PPC64_TOC16_LO;
13329 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13330 break;
13331
13332 case R_PPC64_TOC16:
13333 case R_PPC64_TOC16_LO:
13334 case R_PPC64_TOC16_DS:
13335 case R_PPC64_TOC16_LO_DS:
13336 {
13337 /* Check for toc tls entries. */
13338 unsigned char *toc_tls;
13339 int retval;
13340
13341 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13342 &local_syms, rel, input_bfd);
13343 if (retval == 0)
13344 return FALSE;
13345
13346 if (toc_tls)
13347 {
13348 tls_mask = *toc_tls;
13349 if (r_type == R_PPC64_TOC16_DS
13350 || r_type == R_PPC64_TOC16_LO_DS)
13351 {
13352 if (tls_mask != 0
13353 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13354 goto toctprel;
13355 }
13356 else
13357 {
13358 /* If we found a GD reloc pair, then we might be
13359 doing a GD->IE transition. */
13360 if (retval == 2)
13361 {
13362 tls_gd = TLS_TPRELGD;
13363 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13364 goto tls_ldgd_opt;
13365 }
13366 else if (retval == 3)
13367 {
13368 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13369 goto tls_ldgd_opt;
13370 }
13371 }
13372 }
13373 }
13374 break;
13375
13376 case R_PPC64_GOT_TPREL16_HI:
13377 case R_PPC64_GOT_TPREL16_HA:
13378 if (tls_mask != 0
13379 && (tls_mask & TLS_TPREL) == 0)
13380 {
13381 rel->r_offset -= d_offset;
13382 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13383 r_type = R_PPC64_NONE;
13384 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13385 }
13386 break;
13387
13388 case R_PPC64_GOT_TPREL16_DS:
13389 case R_PPC64_GOT_TPREL16_LO_DS:
13390 if (tls_mask != 0
13391 && (tls_mask & TLS_TPREL) == 0)
13392 {
13393 toctprel:
13394 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13395 insn &= 31 << 21;
13396 insn |= 0x3c0d0000; /* addis 0,13,0 */
13397 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13398 r_type = R_PPC64_TPREL16_HA;
13399 if (toc_symndx != 0)
13400 {
13401 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13402 rel->r_addend = toc_addend;
13403 /* We changed the symbol. Start over in order to
13404 get h, sym, sec etc. right. */
13405 rel--;
13406 continue;
13407 }
13408 else
13409 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13410 }
13411 break;
13412
13413 case R_PPC64_TLS:
13414 if (tls_mask != 0
13415 && (tls_mask & TLS_TPREL) == 0)
13416 {
13417 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13418 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13419 if (insn == 0)
13420 abort ();
13421 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13422 /* Was PPC64_TLS which sits on insn boundary, now
13423 PPC64_TPREL16_LO which is at low-order half-word. */
13424 rel->r_offset += d_offset;
13425 r_type = R_PPC64_TPREL16_LO;
13426 if (toc_symndx != 0)
13427 {
13428 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13429 rel->r_addend = toc_addend;
13430 /* We changed the symbol. Start over in order to
13431 get h, sym, sec etc. right. */
13432 rel--;
13433 continue;
13434 }
13435 else
13436 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13437 }
13438 break;
13439
13440 case R_PPC64_GOT_TLSGD16_HI:
13441 case R_PPC64_GOT_TLSGD16_HA:
13442 tls_gd = TLS_TPRELGD;
13443 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13444 goto tls_gdld_hi;
13445 break;
13446
13447 case R_PPC64_GOT_TLSLD16_HI:
13448 case R_PPC64_GOT_TLSLD16_HA:
13449 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13450 {
13451 tls_gdld_hi:
13452 if ((tls_mask & tls_gd) != 0)
13453 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13454 + R_PPC64_GOT_TPREL16_DS);
13455 else
13456 {
13457 rel->r_offset -= d_offset;
13458 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13459 r_type = R_PPC64_NONE;
13460 }
13461 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13462 }
13463 break;
13464
13465 case R_PPC64_GOT_TLSGD16:
13466 case R_PPC64_GOT_TLSGD16_LO:
13467 tls_gd = TLS_TPRELGD;
13468 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13469 goto tls_ldgd_opt;
13470 break;
13471
13472 case R_PPC64_GOT_TLSLD16:
13473 case R_PPC64_GOT_TLSLD16_LO:
13474 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13475 {
13476 unsigned int insn1, insn2, insn3;
13477 bfd_vma offset;
13478
13479 tls_ldgd_opt:
13480 offset = (bfd_vma) -1;
13481 /* If not using the newer R_PPC64_TLSGD/LD to mark
13482 __tls_get_addr calls, we must trust that the call
13483 stays with its arg setup insns, ie. that the next
13484 reloc is the __tls_get_addr call associated with
13485 the current reloc. Edit both insns. */
13486 if (input_section->has_tls_get_addr_call
13487 && rel + 1 < relend
13488 && branch_reloc_hash_match (input_bfd, rel + 1,
13489 htab->tls_get_addr,
13490 htab->tls_get_addr_fd))
13491 offset = rel[1].r_offset;
13492 /* We read the low GOT_TLS (or TOC16) insn because we
13493 need to keep the destination reg. It may be
13494 something other than the usual r3, and moved to r3
13495 before the call by intervening code. */
13496 insn1 = bfd_get_32 (output_bfd,
13497 contents + rel->r_offset - d_offset);
13498 if ((tls_mask & tls_gd) != 0)
13499 {
13500 /* IE */
13501 insn1 &= (0x1f << 21) | (0x1f << 16);
13502 insn1 |= 58 << 26; /* ld */
13503 insn2 = 0x7c636a14; /* add 3,3,13 */
13504 if (offset != (bfd_vma) -1)
13505 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13506 if ((tls_mask & TLS_EXPLICIT) == 0)
13507 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13508 + R_PPC64_GOT_TPREL16_DS);
13509 else
13510 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13511 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13512 }
13513 else
13514 {
13515 /* LE */
13516 insn1 &= 0x1f << 21;
13517 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13518 insn2 = 0x38630000; /* addi 3,3,0 */
13519 if (tls_gd == 0)
13520 {
13521 /* Was an LD reloc. */
13522 if (toc_symndx)
13523 sec = local_sections[toc_symndx];
13524 for (r_symndx = 0;
13525 r_symndx < symtab_hdr->sh_info;
13526 r_symndx++)
13527 if (local_sections[r_symndx] == sec)
13528 break;
13529 if (r_symndx >= symtab_hdr->sh_info)
13530 r_symndx = STN_UNDEF;
13531 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13532 if (r_symndx != STN_UNDEF)
13533 rel->r_addend -= (local_syms[r_symndx].st_value
13534 + sec->output_offset
13535 + sec->output_section->vma);
13536 }
13537 else if (toc_symndx != 0)
13538 {
13539 r_symndx = toc_symndx;
13540 rel->r_addend = toc_addend;
13541 }
13542 r_type = R_PPC64_TPREL16_HA;
13543 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13544 if (offset != (bfd_vma) -1)
13545 {
13546 rel[1].r_info = ELF64_R_INFO (r_symndx,
13547 R_PPC64_TPREL16_LO);
13548 rel[1].r_offset = offset + d_offset;
13549 rel[1].r_addend = rel->r_addend;
13550 }
13551 }
13552 bfd_put_32 (output_bfd, insn1,
13553 contents + rel->r_offset - d_offset);
13554 if (offset != (bfd_vma) -1)
13555 {
13556 insn3 = bfd_get_32 (output_bfd,
13557 contents + offset + 4);
13558 if (insn3 == NOP
13559 || insn3 == CROR_151515 || insn3 == CROR_313131)
13560 {
13561 rel[1].r_offset += 4;
13562 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13563 insn2 = NOP;
13564 }
13565 bfd_put_32 (output_bfd, insn2, contents + offset);
13566 }
13567 if ((tls_mask & tls_gd) == 0
13568 && (tls_gd == 0 || toc_symndx != 0))
13569 {
13570 /* We changed the symbol. Start over in order
13571 to get h, sym, sec etc. right. */
13572 rel--;
13573 continue;
13574 }
13575 }
13576 break;
13577
13578 case R_PPC64_TLSGD:
13579 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13580 {
13581 unsigned int insn2, insn3;
13582 bfd_vma offset = rel->r_offset;
13583
13584 if ((tls_mask & TLS_TPRELGD) != 0)
13585 {
13586 /* IE */
13587 r_type = R_PPC64_NONE;
13588 insn2 = 0x7c636a14; /* add 3,3,13 */
13589 }
13590 else
13591 {
13592 /* LE */
13593 if (toc_symndx != 0)
13594 {
13595 r_symndx = toc_symndx;
13596 rel->r_addend = toc_addend;
13597 }
13598 r_type = R_PPC64_TPREL16_LO;
13599 rel->r_offset = offset + d_offset;
13600 insn2 = 0x38630000; /* addi 3,3,0 */
13601 }
13602 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13603 /* Zap the reloc on the _tls_get_addr call too. */
13604 BFD_ASSERT (offset == rel[1].r_offset);
13605 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13606 insn3 = bfd_get_32 (output_bfd,
13607 contents + offset + 4);
13608 if (insn3 == NOP
13609 || insn3 == CROR_151515 || insn3 == CROR_313131)
13610 {
13611 rel->r_offset += 4;
13612 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13613 insn2 = NOP;
13614 }
13615 bfd_put_32 (output_bfd, insn2, contents + offset);
13616 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13617 {
13618 rel--;
13619 continue;
13620 }
13621 }
13622 break;
13623
13624 case R_PPC64_TLSLD:
13625 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13626 {
13627 unsigned int insn2, insn3;
13628 bfd_vma offset = rel->r_offset;
13629
13630 if (toc_symndx)
13631 sec = local_sections[toc_symndx];
13632 for (r_symndx = 0;
13633 r_symndx < symtab_hdr->sh_info;
13634 r_symndx++)
13635 if (local_sections[r_symndx] == sec)
13636 break;
13637 if (r_symndx >= symtab_hdr->sh_info)
13638 r_symndx = STN_UNDEF;
13639 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13640 if (r_symndx != STN_UNDEF)
13641 rel->r_addend -= (local_syms[r_symndx].st_value
13642 + sec->output_offset
13643 + sec->output_section->vma);
13644
13645 r_type = R_PPC64_TPREL16_LO;
13646 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13647 rel->r_offset = offset + d_offset;
13648 /* Zap the reloc on the _tls_get_addr call too. */
13649 BFD_ASSERT (offset == rel[1].r_offset);
13650 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13651 insn2 = 0x38630000; /* addi 3,3,0 */
13652 insn3 = bfd_get_32 (output_bfd,
13653 contents + offset + 4);
13654 if (insn3 == NOP
13655 || insn3 == CROR_151515 || insn3 == CROR_313131)
13656 {
13657 rel->r_offset += 4;
13658 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13659 insn2 = NOP;
13660 }
13661 bfd_put_32 (output_bfd, insn2, contents + offset);
13662 rel--;
13663 continue;
13664 }
13665 break;
13666
13667 case R_PPC64_DTPMOD64:
13668 if (rel + 1 < relend
13669 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13670 && rel[1].r_offset == rel->r_offset + 8)
13671 {
13672 if ((tls_mask & TLS_GD) == 0)
13673 {
13674 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13675 if ((tls_mask & TLS_TPRELGD) != 0)
13676 r_type = R_PPC64_TPREL64;
13677 else
13678 {
13679 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13680 r_type = R_PPC64_NONE;
13681 }
13682 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13683 }
13684 }
13685 else
13686 {
13687 if ((tls_mask & TLS_LD) == 0)
13688 {
13689 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13690 r_type = R_PPC64_NONE;
13691 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13692 }
13693 }
13694 break;
13695
13696 case R_PPC64_TPREL64:
13697 if ((tls_mask & TLS_TPREL) == 0)
13698 {
13699 r_type = R_PPC64_NONE;
13700 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13701 }
13702 break;
13703
13704 case R_PPC64_REL16_HA:
13705 /* If we are generating a non-PIC executable, edit
13706 . 0: addis 2,12,.TOC.-0b@ha
13707 . addi 2,2,.TOC.-0b@l
13708 used by ELFv2 global entry points to set up r2, to
13709 . lis 2,.TOC.@ha
13710 . addi 2,2,.TOC.@l
13711 if .TOC. is in range. */
13712 if (!bfd_link_pic (info)
13713 && !info->traditional_format
13714 && h != NULL && &h->elf == htab->elf.hgot
13715 && rel + 1 < relend
13716 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13717 && rel[1].r_offset == rel->r_offset + 4
13718 && rel[1].r_addend == rel->r_addend + 4
13719 && relocation + 0x80008000 <= 0xffffffff)
13720 {
13721 unsigned int insn1, insn2;
13722 bfd_vma offset = rel->r_offset - d_offset;
13723 insn1 = bfd_get_32 (output_bfd, contents + offset);
13724 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13725 if ((insn1 & 0xffff0000) == 0x3c4c0000 /* addis 2,12 */
13726 && (insn2 & 0xffff0000) == 0x38420000 /* addi 2,2 */)
13727 {
13728 r_type = R_PPC64_ADDR16_HA;
13729 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13730 rel->r_addend -= d_offset;
13731 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13732 rel[1].r_addend -= d_offset + 4;
13733 bfd_put_32 (output_bfd, 0x3c400000, contents + offset);
13734 }
13735 }
13736 break;
13737 }
13738
13739 /* Handle other relocations that tweak non-addend part of insn. */
13740 insn = 0;
13741 max_br_offset = 1 << 25;
13742 addend = rel->r_addend;
13743 reloc_dest = DEST_NORMAL;
13744 switch (r_type)
13745 {
13746 default:
13747 break;
13748
13749 case R_PPC64_TOCSAVE:
13750 if (relocation + addend == (rel->r_offset
13751 + input_section->output_offset
13752 + input_section->output_section->vma)
13753 && tocsave_find (htab, NO_INSERT,
13754 &local_syms, rel, input_bfd))
13755 {
13756 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13757 if (insn == NOP
13758 || insn == CROR_151515 || insn == CROR_313131)
13759 bfd_put_32 (input_bfd,
13760 STD_R2_0R1 + STK_TOC (htab),
13761 contents + rel->r_offset);
13762 }
13763 break;
13764
13765 /* Branch taken prediction relocations. */
13766 case R_PPC64_ADDR14_BRTAKEN:
13767 case R_PPC64_REL14_BRTAKEN:
13768 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13769 /* Fall thru. */
13770
13771 /* Branch not taken prediction relocations. */
13772 case R_PPC64_ADDR14_BRNTAKEN:
13773 case R_PPC64_REL14_BRNTAKEN:
13774 insn |= bfd_get_32 (output_bfd,
13775 contents + rel->r_offset) & ~(0x01 << 21);
13776 /* Fall thru. */
13777
13778 case R_PPC64_REL14:
13779 max_br_offset = 1 << 15;
13780 /* Fall thru. */
13781
13782 case R_PPC64_REL24:
13783 /* Calls to functions with a different TOC, such as calls to
13784 shared objects, need to alter the TOC pointer. This is
13785 done using a linkage stub. A REL24 branching to these
13786 linkage stubs needs to be followed by a nop, as the nop
13787 will be replaced with an instruction to restore the TOC
13788 base pointer. */
13789 fdh = h;
13790 if (h != NULL
13791 && h->oh != NULL
13792 && h->oh->is_func_descriptor)
13793 fdh = ppc_follow_link (h->oh);
13794 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13795 htab);
13796 if (stub_entry != NULL
13797 && (stub_entry->stub_type == ppc_stub_plt_call
13798 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13799 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13800 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13801 {
13802 bfd_boolean can_plt_call = FALSE;
13803
13804 /* All of these stubs will modify r2, so there must be a
13805 branch and link followed by a nop. The nop is
13806 replaced by an insn to restore r2. */
13807 if (rel->r_offset + 8 <= input_section->size)
13808 {
13809 unsigned long br;
13810
13811 br = bfd_get_32 (input_bfd,
13812 contents + rel->r_offset);
13813 if ((br & 1) != 0)
13814 {
13815 unsigned long nop;
13816
13817 nop = bfd_get_32 (input_bfd,
13818 contents + rel->r_offset + 4);
13819 if (nop == NOP
13820 || nop == CROR_151515 || nop == CROR_313131)
13821 {
13822 if (h != NULL
13823 && (h == htab->tls_get_addr_fd
13824 || h == htab->tls_get_addr)
13825 && !htab->params->no_tls_get_addr_opt)
13826 {
13827 /* Special stub used, leave nop alone. */
13828 }
13829 else
13830 bfd_put_32 (input_bfd,
13831 LD_R2_0R1 + STK_TOC (htab),
13832 contents + rel->r_offset + 4);
13833 can_plt_call = TRUE;
13834 }
13835 }
13836 }
13837
13838 if (!can_plt_call && h != NULL)
13839 {
13840 const char *name = h->elf.root.root.string;
13841
13842 if (*name == '.')
13843 ++name;
13844
13845 if (strncmp (name, "__libc_start_main", 17) == 0
13846 && (name[17] == 0 || name[17] == '@'))
13847 {
13848 /* Allow crt1 branch to go via a toc adjusting
13849 stub. Other calls that never return could do
13850 the same, if we could detect such. */
13851 can_plt_call = TRUE;
13852 }
13853 }
13854
13855 if (!can_plt_call)
13856 {
13857 /* g++ as of 20130507 emits self-calls without a
13858 following nop. This is arguably wrong since we
13859 have conflicting information. On the one hand a
13860 global symbol and on the other a local call
13861 sequence, but don't error for this special case.
13862 It isn't possible to cheaply verify we have
13863 exactly such a call. Allow all calls to the same
13864 section. */
13865 asection *code_sec = sec;
13866
13867 if (get_opd_info (sec) != NULL)
13868 {
13869 bfd_vma off = (relocation + addend
13870 - sec->output_section->vma
13871 - sec->output_offset);
13872
13873 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
13874 }
13875 if (code_sec == input_section)
13876 can_plt_call = TRUE;
13877 }
13878
13879 if (!can_plt_call)
13880 {
13881 if (stub_entry->stub_type == ppc_stub_plt_call
13882 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13883 info->callbacks->einfo
13884 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13885 "recompile with -fPIC\n"),
13886 input_bfd, input_section, rel->r_offset, sym_name);
13887 else
13888 info->callbacks->einfo
13889 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13890 "(-mcmodel=small toc adjust stub)\n"),
13891 input_bfd, input_section, rel->r_offset, sym_name);
13892
13893 bfd_set_error (bfd_error_bad_value);
13894 ret = FALSE;
13895 }
13896
13897 if (can_plt_call
13898 && (stub_entry->stub_type == ppc_stub_plt_call
13899 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13900 unresolved_reloc = FALSE;
13901 }
13902
13903 if ((stub_entry == NULL
13904 || stub_entry->stub_type == ppc_stub_long_branch
13905 || stub_entry->stub_type == ppc_stub_plt_branch)
13906 && get_opd_info (sec) != NULL)
13907 {
13908 /* The branch destination is the value of the opd entry. */
13909 bfd_vma off = (relocation + addend
13910 - sec->output_section->vma
13911 - sec->output_offset);
13912 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13913 if (dest != (bfd_vma) -1)
13914 {
13915 relocation = dest;
13916 addend = 0;
13917 reloc_dest = DEST_OPD;
13918 }
13919 }
13920
13921 /* If the branch is out of reach we ought to have a long
13922 branch stub. */
13923 from = (rel->r_offset
13924 + input_section->output_offset
13925 + input_section->output_section->vma);
13926
13927 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
13928 ? fdh->elf.other
13929 : sym->st_other);
13930
13931 if (stub_entry != NULL
13932 && (stub_entry->stub_type == ppc_stub_long_branch
13933 || stub_entry->stub_type == ppc_stub_plt_branch)
13934 && (r_type == R_PPC64_ADDR14_BRTAKEN
13935 || r_type == R_PPC64_ADDR14_BRNTAKEN
13936 || (relocation + addend - from + max_br_offset
13937 < 2 * max_br_offset)))
13938 /* Don't use the stub if this branch is in range. */
13939 stub_entry = NULL;
13940
13941 if (stub_entry != NULL)
13942 {
13943 /* Munge up the value and addend so that we call the stub
13944 rather than the procedure directly. */
13945 relocation = (stub_entry->stub_offset
13946 + stub_entry->stub_sec->output_offset
13947 + stub_entry->stub_sec->output_section->vma);
13948 addend = 0;
13949 reloc_dest = DEST_STUB;
13950
13951 if ((stub_entry->stub_type == ppc_stub_plt_call
13952 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13953 && (ALWAYS_EMIT_R2SAVE
13954 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13955 && rel + 1 < relend
13956 && rel[1].r_offset == rel->r_offset + 4
13957 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13958 relocation += 4;
13959 }
13960
13961 if (insn != 0)
13962 {
13963 if (is_isa_v2)
13964 {
13965 /* Set 'a' bit. This is 0b00010 in BO field for branch
13966 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13967 for branch on CTR insns (BO == 1a00t or 1a01t). */
13968 if ((insn & (0x14 << 21)) == (0x04 << 21))
13969 insn |= 0x02 << 21;
13970 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13971 insn |= 0x08 << 21;
13972 else
13973 break;
13974 }
13975 else
13976 {
13977 /* Invert 'y' bit if not the default. */
13978 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13979 insn ^= 0x01 << 21;
13980 }
13981
13982 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13983 }
13984
13985 /* NOP out calls to undefined weak functions.
13986 We can thus call a weak function without first
13987 checking whether the function is defined. */
13988 else if (h != NULL
13989 && h->elf.root.type == bfd_link_hash_undefweak
13990 && h->elf.dynindx == -1
13991 && r_type == R_PPC64_REL24
13992 && relocation == 0
13993 && addend == 0)
13994 {
13995 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13996 continue;
13997 }
13998 break;
13999 }
14000
14001 /* Set `addend'. */
14002 tls_type = 0;
14003 switch (r_type)
14004 {
14005 default:
14006 info->callbacks->einfo
14007 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14008 input_bfd, (int) r_type, sym_name);
14009
14010 bfd_set_error (bfd_error_bad_value);
14011 ret = FALSE;
14012 continue;
14013
14014 case R_PPC64_NONE:
14015 case R_PPC64_TLS:
14016 case R_PPC64_TLSGD:
14017 case R_PPC64_TLSLD:
14018 case R_PPC64_TOCSAVE:
14019 case R_PPC64_GNU_VTINHERIT:
14020 case R_PPC64_GNU_VTENTRY:
14021 continue;
14022
14023 /* GOT16 relocations. Like an ADDR16 using the symbol's
14024 address in the GOT as relocation value instead of the
14025 symbol's value itself. Also, create a GOT entry for the
14026 symbol and put the symbol value there. */
14027 case R_PPC64_GOT_TLSGD16:
14028 case R_PPC64_GOT_TLSGD16_LO:
14029 case R_PPC64_GOT_TLSGD16_HI:
14030 case R_PPC64_GOT_TLSGD16_HA:
14031 tls_type = TLS_TLS | TLS_GD;
14032 goto dogot;
14033
14034 case R_PPC64_GOT_TLSLD16:
14035 case R_PPC64_GOT_TLSLD16_LO:
14036 case R_PPC64_GOT_TLSLD16_HI:
14037 case R_PPC64_GOT_TLSLD16_HA:
14038 tls_type = TLS_TLS | TLS_LD;
14039 goto dogot;
14040
14041 case R_PPC64_GOT_TPREL16_DS:
14042 case R_PPC64_GOT_TPREL16_LO_DS:
14043 case R_PPC64_GOT_TPREL16_HI:
14044 case R_PPC64_GOT_TPREL16_HA:
14045 tls_type = TLS_TLS | TLS_TPREL;
14046 goto dogot;
14047
14048 case R_PPC64_GOT_DTPREL16_DS:
14049 case R_PPC64_GOT_DTPREL16_LO_DS:
14050 case R_PPC64_GOT_DTPREL16_HI:
14051 case R_PPC64_GOT_DTPREL16_HA:
14052 tls_type = TLS_TLS | TLS_DTPREL;
14053 goto dogot;
14054
14055 case R_PPC64_GOT16:
14056 case R_PPC64_GOT16_LO:
14057 case R_PPC64_GOT16_HI:
14058 case R_PPC64_GOT16_HA:
14059 case R_PPC64_GOT16_DS:
14060 case R_PPC64_GOT16_LO_DS:
14061 dogot:
14062 {
14063 /* Relocation is to the entry for this symbol in the global
14064 offset table. */
14065 asection *got;
14066 bfd_vma *offp;
14067 bfd_vma off;
14068 unsigned long indx = 0;
14069 struct got_entry *ent;
14070
14071 if (tls_type == (TLS_TLS | TLS_LD)
14072 && (h == NULL
14073 || !h->elf.def_dynamic))
14074 ent = ppc64_tlsld_got (input_bfd);
14075 else
14076 {
14077
14078 if (h != NULL)
14079 {
14080 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14081 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14082 &h->elf)
14083 || (bfd_link_pic (info)
14084 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14085 /* This is actually a static link, or it is a
14086 -Bsymbolic link and the symbol is defined
14087 locally, or the symbol was forced to be local
14088 because of a version file. */
14089 ;
14090 else
14091 {
14092 BFD_ASSERT (h->elf.dynindx != -1);
14093 indx = h->elf.dynindx;
14094 unresolved_reloc = FALSE;
14095 }
14096 ent = h->elf.got.glist;
14097 }
14098 else
14099 {
14100 if (local_got_ents == NULL)
14101 abort ();
14102 ent = local_got_ents[r_symndx];
14103 }
14104
14105 for (; ent != NULL; ent = ent->next)
14106 if (ent->addend == orig_rel.r_addend
14107 && ent->owner == input_bfd
14108 && ent->tls_type == tls_type)
14109 break;
14110 }
14111
14112 if (ent == NULL)
14113 abort ();
14114 if (ent->is_indirect)
14115 ent = ent->got.ent;
14116 offp = &ent->got.offset;
14117 got = ppc64_elf_tdata (ent->owner)->got;
14118 if (got == NULL)
14119 abort ();
14120
14121 /* The offset must always be a multiple of 8. We use the
14122 least significant bit to record whether we have already
14123 processed this entry. */
14124 off = *offp;
14125 if ((off & 1) != 0)
14126 off &= ~1;
14127 else
14128 {
14129 /* Generate relocs for the dynamic linker, except in
14130 the case of TLSLD where we'll use one entry per
14131 module. */
14132 asection *relgot;
14133 bfd_boolean ifunc;
14134
14135 *offp = off | 1;
14136 relgot = NULL;
14137 ifunc = (h != NULL
14138 ? h->elf.type == STT_GNU_IFUNC
14139 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14140 if (ifunc)
14141 relgot = htab->elf.irelplt;
14142 else if ((bfd_link_pic (info) || indx != 0)
14143 && (h == NULL
14144 || (tls_type == (TLS_TLS | TLS_LD)
14145 && !h->elf.def_dynamic)
14146 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14147 || h->elf.root.type != bfd_link_hash_undefweak))
14148 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14149 if (relgot != NULL)
14150 {
14151 outrel.r_offset = (got->output_section->vma
14152 + got->output_offset
14153 + off);
14154 outrel.r_addend = addend;
14155 if (tls_type & (TLS_LD | TLS_GD))
14156 {
14157 outrel.r_addend = 0;
14158 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14159 if (tls_type == (TLS_TLS | TLS_GD))
14160 {
14161 loc = relgot->contents;
14162 loc += (relgot->reloc_count++
14163 * sizeof (Elf64_External_Rela));
14164 bfd_elf64_swap_reloca_out (output_bfd,
14165 &outrel, loc);
14166 outrel.r_offset += 8;
14167 outrel.r_addend = addend;
14168 outrel.r_info
14169 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14170 }
14171 }
14172 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14173 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14174 else if (tls_type == (TLS_TLS | TLS_TPREL))
14175 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14176 else if (indx != 0)
14177 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14178 else
14179 {
14180 if (ifunc)
14181 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14182 else
14183 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14184
14185 /* Write the .got section contents for the sake
14186 of prelink. */
14187 loc = got->contents + off;
14188 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14189 loc);
14190 }
14191
14192 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14193 {
14194 outrel.r_addend += relocation;
14195 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14196 {
14197 if (htab->elf.tls_sec == NULL)
14198 outrel.r_addend = 0;
14199 else
14200 outrel.r_addend -= htab->elf.tls_sec->vma;
14201 }
14202 }
14203 loc = relgot->contents;
14204 loc += (relgot->reloc_count++
14205 * sizeof (Elf64_External_Rela));
14206 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14207 }
14208
14209 /* Init the .got section contents here if we're not
14210 emitting a reloc. */
14211 else
14212 {
14213 relocation += addend;
14214 if (tls_type == (TLS_TLS | TLS_LD))
14215 relocation = 1;
14216 else if (tls_type != 0)
14217 {
14218 if (htab->elf.tls_sec == NULL)
14219 relocation = 0;
14220 else
14221 {
14222 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14223 if (tls_type == (TLS_TLS | TLS_TPREL))
14224 relocation += DTP_OFFSET - TP_OFFSET;
14225 }
14226
14227 if (tls_type == (TLS_TLS | TLS_GD))
14228 {
14229 bfd_put_64 (output_bfd, relocation,
14230 got->contents + off + 8);
14231 relocation = 1;
14232 }
14233 }
14234
14235 bfd_put_64 (output_bfd, relocation,
14236 got->contents + off);
14237 }
14238 }
14239
14240 if (off >= (bfd_vma) -2)
14241 abort ();
14242
14243 relocation = got->output_section->vma + got->output_offset + off;
14244 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
14245 }
14246 break;
14247
14248 case R_PPC64_PLT16_HA:
14249 case R_PPC64_PLT16_HI:
14250 case R_PPC64_PLT16_LO:
14251 case R_PPC64_PLT32:
14252 case R_PPC64_PLT64:
14253 /* Relocation is to the entry for this symbol in the
14254 procedure linkage table. */
14255
14256 /* Resolve a PLT reloc against a local symbol directly,
14257 without using the procedure linkage table. */
14258 if (h == NULL)
14259 break;
14260
14261 /* It's possible that we didn't make a PLT entry for this
14262 symbol. This happens when statically linking PIC code,
14263 or when using -Bsymbolic. Go find a match if there is a
14264 PLT entry. */
14265 if (htab->elf.splt != NULL)
14266 {
14267 struct plt_entry *ent;
14268 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
14269 if (ent->plt.offset != (bfd_vma) -1
14270 && ent->addend == orig_rel.r_addend)
14271 {
14272 relocation = (htab->elf.splt->output_section->vma
14273 + htab->elf.splt->output_offset
14274 + ent->plt.offset);
14275 unresolved_reloc = FALSE;
14276 break;
14277 }
14278 }
14279 break;
14280
14281 case R_PPC64_TOC:
14282 /* Relocation value is TOC base. */
14283 relocation = TOCstart;
14284 if (r_symndx == STN_UNDEF)
14285 relocation += htab->stub_group[input_section->id].toc_off;
14286 else if (unresolved_reloc)
14287 ;
14288 else if (sec != NULL && sec->id <= htab->top_id)
14289 relocation += htab->stub_group[sec->id].toc_off;
14290 else
14291 unresolved_reloc = TRUE;
14292 goto dodyn;
14293
14294 /* TOC16 relocs. We want the offset relative to the TOC base,
14295 which is the address of the start of the TOC plus 0x8000.
14296 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14297 in this order. */
14298 case R_PPC64_TOC16:
14299 case R_PPC64_TOC16_LO:
14300 case R_PPC64_TOC16_HI:
14301 case R_PPC64_TOC16_DS:
14302 case R_PPC64_TOC16_LO_DS:
14303 case R_PPC64_TOC16_HA:
14304 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
14305 break;
14306
14307 /* Relocate against the beginning of the section. */
14308 case R_PPC64_SECTOFF:
14309 case R_PPC64_SECTOFF_LO:
14310 case R_PPC64_SECTOFF_HI:
14311 case R_PPC64_SECTOFF_DS:
14312 case R_PPC64_SECTOFF_LO_DS:
14313 case R_PPC64_SECTOFF_HA:
14314 if (sec != NULL)
14315 addend -= sec->output_section->vma;
14316 break;
14317
14318 case R_PPC64_REL16:
14319 case R_PPC64_REL16_LO:
14320 case R_PPC64_REL16_HI:
14321 case R_PPC64_REL16_HA:
14322 break;
14323
14324 case R_PPC64_REL14:
14325 case R_PPC64_REL14_BRNTAKEN:
14326 case R_PPC64_REL14_BRTAKEN:
14327 case R_PPC64_REL24:
14328 break;
14329
14330 case R_PPC64_TPREL16:
14331 case R_PPC64_TPREL16_LO:
14332 case R_PPC64_TPREL16_HI:
14333 case R_PPC64_TPREL16_HA:
14334 case R_PPC64_TPREL16_DS:
14335 case R_PPC64_TPREL16_LO_DS:
14336 case R_PPC64_TPREL16_HIGH:
14337 case R_PPC64_TPREL16_HIGHA:
14338 case R_PPC64_TPREL16_HIGHER:
14339 case R_PPC64_TPREL16_HIGHERA:
14340 case R_PPC64_TPREL16_HIGHEST:
14341 case R_PPC64_TPREL16_HIGHESTA:
14342 if (h != NULL
14343 && h->elf.root.type == bfd_link_hash_undefweak
14344 && h->elf.dynindx == -1)
14345 {
14346 /* Make this relocation against an undefined weak symbol
14347 resolve to zero. This is really just a tweak, since
14348 code using weak externs ought to check that they are
14349 defined before using them. */
14350 bfd_byte *p = contents + rel->r_offset - d_offset;
14351
14352 insn = bfd_get_32 (output_bfd, p);
14353 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14354 if (insn != 0)
14355 bfd_put_32 (output_bfd, insn, p);
14356 break;
14357 }
14358 if (htab->elf.tls_sec != NULL)
14359 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14360 if (bfd_link_pic (info))
14361 /* The TPREL16 relocs shouldn't really be used in shared
14362 libs as they will result in DT_TEXTREL being set, but
14363 support them anyway. */
14364 goto dodyn;
14365 break;
14366
14367 case R_PPC64_DTPREL16:
14368 case R_PPC64_DTPREL16_LO:
14369 case R_PPC64_DTPREL16_HI:
14370 case R_PPC64_DTPREL16_HA:
14371 case R_PPC64_DTPREL16_DS:
14372 case R_PPC64_DTPREL16_LO_DS:
14373 case R_PPC64_DTPREL16_HIGH:
14374 case R_PPC64_DTPREL16_HIGHA:
14375 case R_PPC64_DTPREL16_HIGHER:
14376 case R_PPC64_DTPREL16_HIGHERA:
14377 case R_PPC64_DTPREL16_HIGHEST:
14378 case R_PPC64_DTPREL16_HIGHESTA:
14379 if (htab->elf.tls_sec != NULL)
14380 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14381 break;
14382
14383 case R_PPC64_ADDR64_LOCAL:
14384 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14385 ? h->elf.other
14386 : sym->st_other);
14387 break;
14388
14389 case R_PPC64_DTPMOD64:
14390 relocation = 1;
14391 addend = 0;
14392 goto dodyn;
14393
14394 case R_PPC64_TPREL64:
14395 if (htab->elf.tls_sec != NULL)
14396 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14397 goto dodyn;
14398
14399 case R_PPC64_DTPREL64:
14400 if (htab->elf.tls_sec != NULL)
14401 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14402 /* Fall thru */
14403
14404 /* Relocations that may need to be propagated if this is a
14405 dynamic object. */
14406 case R_PPC64_REL30:
14407 case R_PPC64_REL32:
14408 case R_PPC64_REL64:
14409 case R_PPC64_ADDR14:
14410 case R_PPC64_ADDR14_BRNTAKEN:
14411 case R_PPC64_ADDR14_BRTAKEN:
14412 case R_PPC64_ADDR16:
14413 case R_PPC64_ADDR16_DS:
14414 case R_PPC64_ADDR16_HA:
14415 case R_PPC64_ADDR16_HI:
14416 case R_PPC64_ADDR16_HIGH:
14417 case R_PPC64_ADDR16_HIGHA:
14418 case R_PPC64_ADDR16_HIGHER:
14419 case R_PPC64_ADDR16_HIGHERA:
14420 case R_PPC64_ADDR16_HIGHEST:
14421 case R_PPC64_ADDR16_HIGHESTA:
14422 case R_PPC64_ADDR16_LO:
14423 case R_PPC64_ADDR16_LO_DS:
14424 case R_PPC64_ADDR24:
14425 case R_PPC64_ADDR32:
14426 case R_PPC64_ADDR64:
14427 case R_PPC64_UADDR16:
14428 case R_PPC64_UADDR32:
14429 case R_PPC64_UADDR64:
14430 dodyn:
14431 if ((input_section->flags & SEC_ALLOC) == 0)
14432 break;
14433
14434 if (NO_OPD_RELOCS && is_opd)
14435 break;
14436
14437 if ((bfd_link_pic (info)
14438 && (h == NULL
14439 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14440 || h->elf.root.type != bfd_link_hash_undefweak)
14441 && (must_be_dyn_reloc (info, r_type)
14442 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14443 || (ELIMINATE_COPY_RELOCS
14444 && !bfd_link_pic (info)
14445 && h != NULL
14446 && h->elf.dynindx != -1
14447 && !h->elf.non_got_ref
14448 && !h->elf.def_regular)
14449 || (!bfd_link_pic (info)
14450 && (h != NULL
14451 ? h->elf.type == STT_GNU_IFUNC
14452 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14453 {
14454 bfd_boolean skip, relocate;
14455 asection *sreloc;
14456 bfd_vma out_off;
14457
14458 /* When generating a dynamic object, these relocations
14459 are copied into the output file to be resolved at run
14460 time. */
14461
14462 skip = FALSE;
14463 relocate = FALSE;
14464
14465 out_off = _bfd_elf_section_offset (output_bfd, info,
14466 input_section, rel->r_offset);
14467 if (out_off == (bfd_vma) -1)
14468 skip = TRUE;
14469 else if (out_off == (bfd_vma) -2)
14470 skip = TRUE, relocate = TRUE;
14471 out_off += (input_section->output_section->vma
14472 + input_section->output_offset);
14473 outrel.r_offset = out_off;
14474 outrel.r_addend = rel->r_addend;
14475
14476 /* Optimize unaligned reloc use. */
14477 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14478 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14479 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14480 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14481 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14482 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14483 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14484 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14485 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14486
14487 if (skip)
14488 memset (&outrel, 0, sizeof outrel);
14489 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14490 && !is_opd
14491 && r_type != R_PPC64_TOC)
14492 {
14493 BFD_ASSERT (h->elf.dynindx != -1);
14494 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14495 }
14496 else
14497 {
14498 /* This symbol is local, or marked to become local,
14499 or this is an opd section reloc which must point
14500 at a local function. */
14501 outrel.r_addend += relocation;
14502 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14503 {
14504 if (is_opd && h != NULL)
14505 {
14506 /* Lie about opd entries. This case occurs
14507 when building shared libraries and we
14508 reference a function in another shared
14509 lib. The same thing happens for a weak
14510 definition in an application that's
14511 overridden by a strong definition in a
14512 shared lib. (I believe this is a generic
14513 bug in binutils handling of weak syms.)
14514 In these cases we won't use the opd
14515 entry in this lib. */
14516 unresolved_reloc = FALSE;
14517 }
14518 if (!is_opd
14519 && r_type == R_PPC64_ADDR64
14520 && (h != NULL
14521 ? h->elf.type == STT_GNU_IFUNC
14522 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14523 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14524 else
14525 {
14526 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14527
14528 /* We need to relocate .opd contents for ld.so.
14529 Prelink also wants simple and consistent rules
14530 for relocs. This make all RELATIVE relocs have
14531 *r_offset equal to r_addend. */
14532 relocate = TRUE;
14533 }
14534 }
14535 else
14536 {
14537 long indx = 0;
14538
14539 if (h != NULL
14540 ? h->elf.type == STT_GNU_IFUNC
14541 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14542 {
14543 info->callbacks->einfo
14544 (_("%P: %H: %s for indirect "
14545 "function `%T' unsupported\n"),
14546 input_bfd, input_section, rel->r_offset,
14547 ppc64_elf_howto_table[r_type]->name,
14548 sym_name);
14549 ret = FALSE;
14550 }
14551 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14552 ;
14553 else if (sec == NULL || sec->owner == NULL)
14554 {
14555 bfd_set_error (bfd_error_bad_value);
14556 return FALSE;
14557 }
14558 else
14559 {
14560 asection *osec;
14561
14562 osec = sec->output_section;
14563 indx = elf_section_data (osec)->dynindx;
14564
14565 if (indx == 0)
14566 {
14567 if ((osec->flags & SEC_READONLY) == 0
14568 && htab->elf.data_index_section != NULL)
14569 osec = htab->elf.data_index_section;
14570 else
14571 osec = htab->elf.text_index_section;
14572 indx = elf_section_data (osec)->dynindx;
14573 }
14574 BFD_ASSERT (indx != 0);
14575
14576 /* We are turning this relocation into one
14577 against a section symbol, so subtract out
14578 the output section's address but not the
14579 offset of the input section in the output
14580 section. */
14581 outrel.r_addend -= osec->vma;
14582 }
14583
14584 outrel.r_info = ELF64_R_INFO (indx, r_type);
14585 }
14586 }
14587
14588 sreloc = elf_section_data (input_section)->sreloc;
14589 if (h != NULL
14590 ? h->elf.type == STT_GNU_IFUNC
14591 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14592 sreloc = htab->elf.irelplt;
14593 if (sreloc == NULL)
14594 abort ();
14595
14596 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14597 >= sreloc->size)
14598 abort ();
14599 loc = sreloc->contents;
14600 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14601 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14602
14603 /* If this reloc is against an external symbol, it will
14604 be computed at runtime, so there's no need to do
14605 anything now. However, for the sake of prelink ensure
14606 that the section contents are a known value. */
14607 if (! relocate)
14608 {
14609 unresolved_reloc = FALSE;
14610 /* The value chosen here is quite arbitrary as ld.so
14611 ignores section contents except for the special
14612 case of .opd where the contents might be accessed
14613 before relocation. Choose zero, as that won't
14614 cause reloc overflow. */
14615 relocation = 0;
14616 addend = 0;
14617 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14618 to improve backward compatibility with older
14619 versions of ld. */
14620 if (r_type == R_PPC64_ADDR64)
14621 addend = outrel.r_addend;
14622 /* Adjust pc_relative relocs to have zero in *r_offset. */
14623 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14624 addend = (input_section->output_section->vma
14625 + input_section->output_offset
14626 + rel->r_offset);
14627 }
14628 }
14629 break;
14630
14631 case R_PPC64_COPY:
14632 case R_PPC64_GLOB_DAT:
14633 case R_PPC64_JMP_SLOT:
14634 case R_PPC64_JMP_IREL:
14635 case R_PPC64_RELATIVE:
14636 /* We shouldn't ever see these dynamic relocs in relocatable
14637 files. */
14638 /* Fall through. */
14639
14640 case R_PPC64_PLTGOT16:
14641 case R_PPC64_PLTGOT16_DS:
14642 case R_PPC64_PLTGOT16_HA:
14643 case R_PPC64_PLTGOT16_HI:
14644 case R_PPC64_PLTGOT16_LO:
14645 case R_PPC64_PLTGOT16_LO_DS:
14646 case R_PPC64_PLTREL32:
14647 case R_PPC64_PLTREL64:
14648 /* These ones haven't been implemented yet. */
14649
14650 info->callbacks->einfo
14651 (_("%P: %B: %s is not supported for `%T'\n"),
14652 input_bfd,
14653 ppc64_elf_howto_table[r_type]->name, sym_name);
14654
14655 bfd_set_error (bfd_error_invalid_operation);
14656 ret = FALSE;
14657 continue;
14658 }
14659
14660 /* Multi-instruction sequences that access the TOC can be
14661 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14662 to nop; addi rb,r2,x; */
14663 switch (r_type)
14664 {
14665 default:
14666 break;
14667
14668 case R_PPC64_GOT_TLSLD16_HI:
14669 case R_PPC64_GOT_TLSGD16_HI:
14670 case R_PPC64_GOT_TPREL16_HI:
14671 case R_PPC64_GOT_DTPREL16_HI:
14672 case R_PPC64_GOT16_HI:
14673 case R_PPC64_TOC16_HI:
14674 /* These relocs would only be useful if building up an
14675 offset to later add to r2, perhaps in an indexed
14676 addressing mode instruction. Don't try to optimize.
14677 Unfortunately, the possibility of someone building up an
14678 offset like this or even with the HA relocs, means that
14679 we need to check the high insn when optimizing the low
14680 insn. */
14681 break;
14682
14683 case R_PPC64_GOT_TLSLD16_HA:
14684 case R_PPC64_GOT_TLSGD16_HA:
14685 case R_PPC64_GOT_TPREL16_HA:
14686 case R_PPC64_GOT_DTPREL16_HA:
14687 case R_PPC64_GOT16_HA:
14688 case R_PPC64_TOC16_HA:
14689 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14690 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14691 {
14692 bfd_byte *p = contents + (rel->r_offset & ~3);
14693 bfd_put_32 (input_bfd, NOP, p);
14694 }
14695 break;
14696
14697 case R_PPC64_GOT_TLSLD16_LO:
14698 case R_PPC64_GOT_TLSGD16_LO:
14699 case R_PPC64_GOT_TPREL16_LO_DS:
14700 case R_PPC64_GOT_DTPREL16_LO_DS:
14701 case R_PPC64_GOT16_LO:
14702 case R_PPC64_GOT16_LO_DS:
14703 case R_PPC64_TOC16_LO:
14704 case R_PPC64_TOC16_LO_DS:
14705 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14706 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14707 {
14708 bfd_byte *p = contents + (rel->r_offset & ~3);
14709 insn = bfd_get_32 (input_bfd, p);
14710 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14711 {
14712 /* Transform addic to addi when we change reg. */
14713 insn &= ~((0x3f << 26) | (0x1f << 16));
14714 insn |= (14u << 26) | (2 << 16);
14715 }
14716 else
14717 {
14718 insn &= ~(0x1f << 16);
14719 insn |= 2 << 16;
14720 }
14721 bfd_put_32 (input_bfd, insn, p);
14722 }
14723 break;
14724 }
14725
14726 /* Do any further special processing. */
14727 howto = ppc64_elf_howto_table[(int) r_type];
14728 switch (r_type)
14729 {
14730 default:
14731 break;
14732
14733 case R_PPC64_REL16_HA:
14734 case R_PPC64_ADDR16_HA:
14735 case R_PPC64_ADDR16_HIGHA:
14736 case R_PPC64_ADDR16_HIGHERA:
14737 case R_PPC64_ADDR16_HIGHESTA:
14738 case R_PPC64_TOC16_HA:
14739 case R_PPC64_SECTOFF_HA:
14740 case R_PPC64_TPREL16_HA:
14741 case R_PPC64_TPREL16_HIGHA:
14742 case R_PPC64_TPREL16_HIGHERA:
14743 case R_PPC64_TPREL16_HIGHESTA:
14744 case R_PPC64_DTPREL16_HA:
14745 case R_PPC64_DTPREL16_HIGHA:
14746 case R_PPC64_DTPREL16_HIGHERA:
14747 case R_PPC64_DTPREL16_HIGHESTA:
14748 /* It's just possible that this symbol is a weak symbol
14749 that's not actually defined anywhere. In that case,
14750 'sec' would be NULL, and we should leave the symbol
14751 alone (it will be set to zero elsewhere in the link). */
14752 if (sec == NULL)
14753 break;
14754 /* Fall thru */
14755
14756 case R_PPC64_GOT16_HA:
14757 case R_PPC64_PLTGOT16_HA:
14758 case R_PPC64_PLT16_HA:
14759 case R_PPC64_GOT_TLSGD16_HA:
14760 case R_PPC64_GOT_TLSLD16_HA:
14761 case R_PPC64_GOT_TPREL16_HA:
14762 case R_PPC64_GOT_DTPREL16_HA:
14763 /* Add 0x10000 if sign bit in 0:15 is set.
14764 Bits 0:15 are not used. */
14765 addend += 0x8000;
14766 break;
14767
14768 case R_PPC64_ADDR16_DS:
14769 case R_PPC64_ADDR16_LO_DS:
14770 case R_PPC64_GOT16_DS:
14771 case R_PPC64_GOT16_LO_DS:
14772 case R_PPC64_PLT16_LO_DS:
14773 case R_PPC64_SECTOFF_DS:
14774 case R_PPC64_SECTOFF_LO_DS:
14775 case R_PPC64_TOC16_DS:
14776 case R_PPC64_TOC16_LO_DS:
14777 case R_PPC64_PLTGOT16_DS:
14778 case R_PPC64_PLTGOT16_LO_DS:
14779 case R_PPC64_GOT_TPREL16_DS:
14780 case R_PPC64_GOT_TPREL16_LO_DS:
14781 case R_PPC64_GOT_DTPREL16_DS:
14782 case R_PPC64_GOT_DTPREL16_LO_DS:
14783 case R_PPC64_TPREL16_DS:
14784 case R_PPC64_TPREL16_LO_DS:
14785 case R_PPC64_DTPREL16_DS:
14786 case R_PPC64_DTPREL16_LO_DS:
14787 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14788 mask = 3;
14789 /* If this reloc is against an lq insn, then the value must be
14790 a multiple of 16. This is somewhat of a hack, but the
14791 "correct" way to do this by defining _DQ forms of all the
14792 _DS relocs bloats all reloc switches in this file. It
14793 doesn't seem to make much sense to use any of these relocs
14794 in data, so testing the insn should be safe. */
14795 if ((insn & (0x3f << 26)) == (56u << 26))
14796 mask = 15;
14797 if (((relocation + addend) & mask) != 0)
14798 {
14799 info->callbacks->einfo
14800 (_("%P: %H: error: %s not a multiple of %u\n"),
14801 input_bfd, input_section, rel->r_offset,
14802 howto->name,
14803 mask + 1);
14804 bfd_set_error (bfd_error_bad_value);
14805 ret = FALSE;
14806 continue;
14807 }
14808 break;
14809 }
14810
14811 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
14812 because such sections are not SEC_ALLOC and thus ld.so will
14813 not process them. */
14814 if (unresolved_reloc
14815 && !((input_section->flags & SEC_DEBUGGING) != 0
14816 && h->elf.def_dynamic)
14817 && _bfd_elf_section_offset (output_bfd, info, input_section,
14818 rel->r_offset) != (bfd_vma) -1)
14819 {
14820 info->callbacks->einfo
14821 (_("%P: %H: unresolvable %s against `%T'\n"),
14822 input_bfd, input_section, rel->r_offset,
14823 howto->name,
14824 h->elf.root.root.string);
14825 ret = FALSE;
14826 }
14827
14828 /* 16-bit fields in insns mostly have signed values, but a
14829 few insns have 16-bit unsigned values. Really, we should
14830 have different reloc types. */
14831 if (howto->complain_on_overflow != complain_overflow_dont
14832 && howto->dst_mask == 0xffff
14833 && (input_section->flags & SEC_CODE) != 0)
14834 {
14835 enum complain_overflow complain = complain_overflow_signed;
14836
14837 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14838 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
14839 complain = complain_overflow_bitfield;
14840 else if (howto->rightshift == 0
14841 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
14842 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
14843 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
14844 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
14845 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
14846 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
14847 complain = complain_overflow_unsigned;
14848 if (howto->complain_on_overflow != complain)
14849 {
14850 alt_howto = *howto;
14851 alt_howto.complain_on_overflow = complain;
14852 howto = &alt_howto;
14853 }
14854 }
14855
14856 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
14857 rel->r_offset, relocation, addend);
14858
14859 if (r != bfd_reloc_ok)
14860 {
14861 char *more_info = NULL;
14862 const char *reloc_name = howto->name;
14863
14864 if (reloc_dest != DEST_NORMAL)
14865 {
14866 more_info = bfd_malloc (strlen (reloc_name) + 8);
14867 if (more_info != NULL)
14868 {
14869 strcpy (more_info, reloc_name);
14870 strcat (more_info, (reloc_dest == DEST_OPD
14871 ? " (OPD)" : " (stub)"));
14872 reloc_name = more_info;
14873 }
14874 }
14875
14876 if (r == bfd_reloc_overflow)
14877 {
14878 /* On code like "if (foo) foo();" don't report overflow
14879 on a branch to zero when foo is undefined. */
14880 if (!warned
14881 && (reloc_dest == DEST_STUB
14882 || !(h != NULL
14883 && (h->elf.root.type == bfd_link_hash_undefweak
14884 || h->elf.root.type == bfd_link_hash_undefined)
14885 && is_branch_reloc (r_type))))
14886 {
14887 if (!((*info->callbacks->reloc_overflow)
14888 (info, &h->elf.root, sym_name,
14889 reloc_name, orig_rel.r_addend,
14890 input_bfd, input_section, rel->r_offset)))
14891 return FALSE;
14892 }
14893 }
14894 else
14895 {
14896 info->callbacks->einfo
14897 (_("%P: %H: %s against `%T': error %d\n"),
14898 input_bfd, input_section, rel->r_offset,
14899 reloc_name, sym_name, (int) r);
14900 ret = FALSE;
14901 }
14902 if (more_info != NULL)
14903 free (more_info);
14904 }
14905 }
14906
14907 /* If we're emitting relocations, then shortly after this function
14908 returns, reloc offsets and addends for this section will be
14909 adjusted. Worse, reloc symbol indices will be for the output
14910 file rather than the input. Save a copy of the relocs for
14911 opd_entry_value. */
14912 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
14913 {
14914 bfd_size_type amt;
14915 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14916 rel = bfd_alloc (input_bfd, amt);
14917 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
14918 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
14919 if (rel == NULL)
14920 return FALSE;
14921 memcpy (rel, relocs, amt);
14922 }
14923 return ret;
14924 }
14925
14926 /* Adjust the value of any local symbols in opd sections. */
14927
14928 static int
14929 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14930 const char *name ATTRIBUTE_UNUSED,
14931 Elf_Internal_Sym *elfsym,
14932 asection *input_sec,
14933 struct elf_link_hash_entry *h)
14934 {
14935 struct _opd_sec_data *opd;
14936 long adjust;
14937 bfd_vma value;
14938
14939 if (h != NULL)
14940 return 1;
14941
14942 opd = get_opd_info (input_sec);
14943 if (opd == NULL || opd->adjust == NULL)
14944 return 1;
14945
14946 value = elfsym->st_value - input_sec->output_offset;
14947 if (!bfd_link_relocatable (info))
14948 value -= input_sec->output_section->vma;
14949
14950 adjust = opd->adjust[OPD_NDX (value)];
14951 if (adjust == -1)
14952 return 2;
14953
14954 elfsym->st_value += adjust;
14955 return 1;
14956 }
14957
14958 /* Finish up dynamic symbol handling. We set the contents of various
14959 dynamic sections here. */
14960
14961 static bfd_boolean
14962 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14963 struct bfd_link_info *info,
14964 struct elf_link_hash_entry *h,
14965 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14966 {
14967 struct ppc_link_hash_table *htab;
14968 struct plt_entry *ent;
14969 Elf_Internal_Rela rela;
14970 bfd_byte *loc;
14971
14972 htab = ppc_hash_table (info);
14973 if (htab == NULL)
14974 return FALSE;
14975
14976 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14977 if (ent->plt.offset != (bfd_vma) -1)
14978 {
14979 /* This symbol has an entry in the procedure linkage
14980 table. Set it up. */
14981 if (!htab->elf.dynamic_sections_created
14982 || h->dynindx == -1)
14983 {
14984 BFD_ASSERT (h->type == STT_GNU_IFUNC
14985 && h->def_regular
14986 && (h->root.type == bfd_link_hash_defined
14987 || h->root.type == bfd_link_hash_defweak));
14988 rela.r_offset = (htab->elf.iplt->output_section->vma
14989 + htab->elf.iplt->output_offset
14990 + ent->plt.offset);
14991 if (htab->opd_abi)
14992 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14993 else
14994 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14995 rela.r_addend = (h->root.u.def.value
14996 + h->root.u.def.section->output_offset
14997 + h->root.u.def.section->output_section->vma
14998 + ent->addend);
14999 loc = (htab->elf.irelplt->contents
15000 + (htab->elf.irelplt->reloc_count++
15001 * sizeof (Elf64_External_Rela)));
15002 }
15003 else
15004 {
15005 rela.r_offset = (htab->elf.splt->output_section->vma
15006 + htab->elf.splt->output_offset
15007 + ent->plt.offset);
15008 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15009 rela.r_addend = ent->addend;
15010 loc = (htab->elf.srelplt->contents
15011 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15012 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15013 }
15014 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15015
15016 if (!htab->opd_abi)
15017 {
15018 if (!h->def_regular)
15019 {
15020 /* Mark the symbol as undefined, rather than as
15021 defined in glink. Leave the value if there were
15022 any relocations where pointer equality matters
15023 (this is a clue for the dynamic linker, to make
15024 function pointer comparisons work between an
15025 application and shared library), otherwise set it
15026 to zero. */
15027 sym->st_shndx = SHN_UNDEF;
15028 if (!h->pointer_equality_needed)
15029 sym->st_value = 0;
15030 else if (!h->ref_regular_nonweak)
15031 {
15032 /* This breaks function pointer comparisons, but
15033 that is better than breaking tests for a NULL
15034 function pointer. */
15035 sym->st_value = 0;
15036 }
15037 }
15038 }
15039 }
15040
15041 if (h->needs_copy)
15042 {
15043 /* This symbol needs a copy reloc. Set it up. */
15044
15045 if (h->dynindx == -1
15046 || (h->root.type != bfd_link_hash_defined
15047 && h->root.type != bfd_link_hash_defweak)
15048 || htab->relbss == NULL)
15049 abort ();
15050
15051 rela.r_offset = (h->root.u.def.value
15052 + h->root.u.def.section->output_section->vma
15053 + h->root.u.def.section->output_offset);
15054 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15055 rela.r_addend = 0;
15056 loc = htab->relbss->contents;
15057 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15058 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15059 }
15060
15061 return TRUE;
15062 }
15063
15064 /* Used to decide how to sort relocs in an optimal manner for the
15065 dynamic linker, before writing them out. */
15066
15067 static enum elf_reloc_type_class
15068 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15069 const asection *rel_sec,
15070 const Elf_Internal_Rela *rela)
15071 {
15072 enum elf_ppc64_reloc_type r_type;
15073 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15074
15075 if (rel_sec == htab->elf.irelplt)
15076 return reloc_class_ifunc;
15077
15078 r_type = ELF64_R_TYPE (rela->r_info);
15079 switch (r_type)
15080 {
15081 case R_PPC64_RELATIVE:
15082 return reloc_class_relative;
15083 case R_PPC64_JMP_SLOT:
15084 return reloc_class_plt;
15085 case R_PPC64_COPY:
15086 return reloc_class_copy;
15087 default:
15088 return reloc_class_normal;
15089 }
15090 }
15091
15092 /* Finish up the dynamic sections. */
15093
15094 static bfd_boolean
15095 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15096 struct bfd_link_info *info)
15097 {
15098 struct ppc_link_hash_table *htab;
15099 bfd *dynobj;
15100 asection *sdyn;
15101
15102 htab = ppc_hash_table (info);
15103 if (htab == NULL)
15104 return FALSE;
15105
15106 dynobj = htab->elf.dynobj;
15107 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15108
15109 if (htab->elf.dynamic_sections_created)
15110 {
15111 Elf64_External_Dyn *dyncon, *dynconend;
15112
15113 if (sdyn == NULL || htab->elf.sgot == NULL)
15114 abort ();
15115
15116 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15117 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15118 for (; dyncon < dynconend; dyncon++)
15119 {
15120 Elf_Internal_Dyn dyn;
15121 asection *s;
15122
15123 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15124
15125 switch (dyn.d_tag)
15126 {
15127 default:
15128 continue;
15129
15130 case DT_PPC64_GLINK:
15131 s = htab->glink;
15132 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15133 /* We stupidly defined DT_PPC64_GLINK to be the start
15134 of glink rather than the first entry point, which is
15135 what ld.so needs, and now have a bigger stub to
15136 support automatic multiple TOCs. */
15137 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15138 break;
15139
15140 case DT_PPC64_OPD:
15141 s = bfd_get_section_by_name (output_bfd, ".opd");
15142 if (s == NULL)
15143 continue;
15144 dyn.d_un.d_ptr = s->vma;
15145 break;
15146
15147 case DT_PPC64_OPT:
15148 if (htab->do_multi_toc && htab->multi_toc_needed)
15149 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15150 break;
15151
15152 case DT_PPC64_OPDSZ:
15153 s = bfd_get_section_by_name (output_bfd, ".opd");
15154 if (s == NULL)
15155 continue;
15156 dyn.d_un.d_val = s->size;
15157 break;
15158
15159 case DT_PLTGOT:
15160 s = htab->elf.splt;
15161 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15162 break;
15163
15164 case DT_JMPREL:
15165 s = htab->elf.srelplt;
15166 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15167 break;
15168
15169 case DT_PLTRELSZ:
15170 dyn.d_un.d_val = htab->elf.srelplt->size;
15171 break;
15172
15173 case DT_RELASZ:
15174 /* Don't count procedure linkage table relocs in the
15175 overall reloc count. */
15176 s = htab->elf.srelplt;
15177 if (s == NULL)
15178 continue;
15179 dyn.d_un.d_val -= s->size;
15180 break;
15181
15182 case DT_RELA:
15183 /* We may not be using the standard ELF linker script.
15184 If .rela.plt is the first .rela section, we adjust
15185 DT_RELA to not include it. */
15186 s = htab->elf.srelplt;
15187 if (s == NULL)
15188 continue;
15189 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15190 continue;
15191 dyn.d_un.d_ptr += s->size;
15192 break;
15193 }
15194
15195 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15196 }
15197 }
15198
15199 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15200 {
15201 /* Fill in the first entry in the global offset table.
15202 We use it to hold the link-time TOCbase. */
15203 bfd_put_64 (output_bfd,
15204 elf_gp (output_bfd) + TOC_BASE_OFF,
15205 htab->elf.sgot->contents);
15206
15207 /* Set .got entry size. */
15208 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15209 }
15210
15211 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15212 {
15213 /* Set .plt entry size. */
15214 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15215 = PLT_ENTRY_SIZE (htab);
15216 }
15217
15218 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15219 brlt ourselves if emitrelocations. */
15220 if (htab->brlt != NULL
15221 && htab->brlt->reloc_count != 0
15222 && !_bfd_elf_link_output_relocs (output_bfd,
15223 htab->brlt,
15224 elf_section_data (htab->brlt)->rela.hdr,
15225 elf_section_data (htab->brlt)->relocs,
15226 NULL))
15227 return FALSE;
15228
15229 if (htab->glink != NULL
15230 && htab->glink->reloc_count != 0
15231 && !_bfd_elf_link_output_relocs (output_bfd,
15232 htab->glink,
15233 elf_section_data (htab->glink)->rela.hdr,
15234 elf_section_data (htab->glink)->relocs,
15235 NULL))
15236 return FALSE;
15237
15238 if (htab->glink_eh_frame != NULL
15239 && htab->glink_eh_frame->size != 0)
15240 {
15241 bfd_vma val;
15242 bfd_byte *p;
15243 asection *stub_sec;
15244
15245 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15246 for (stub_sec = htab->params->stub_bfd->sections;
15247 stub_sec != NULL;
15248 stub_sec = stub_sec->next)
15249 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15250 {
15251 /* FDE length. */
15252 p += 4;
15253 /* CIE pointer. */
15254 p += 4;
15255 /* Offset to stub section. */
15256 val = (stub_sec->output_section->vma
15257 + stub_sec->output_offset);
15258 val -= (htab->glink_eh_frame->output_section->vma
15259 + htab->glink_eh_frame->output_offset
15260 + (p - htab->glink_eh_frame->contents));
15261 if (val + 0x80000000 > 0xffffffff)
15262 {
15263 info->callbacks->einfo
15264 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15265 stub_sec->name);
15266 return FALSE;
15267 }
15268 bfd_put_32 (dynobj, val, p);
15269 p += 4;
15270 /* stub section size. */
15271 p += 4;
15272 /* Augmentation. */
15273 p += 1;
15274 /* Pad. */
15275 p += 7;
15276 }
15277 if (htab->glink != NULL && htab->glink->size != 0)
15278 {
15279 /* FDE length. */
15280 p += 4;
15281 /* CIE pointer. */
15282 p += 4;
15283 /* Offset to .glink. */
15284 val = (htab->glink->output_section->vma
15285 + htab->glink->output_offset
15286 + 8);
15287 val -= (htab->glink_eh_frame->output_section->vma
15288 + htab->glink_eh_frame->output_offset
15289 + (p - htab->glink_eh_frame->contents));
15290 if (val + 0x80000000 > 0xffffffff)
15291 {
15292 info->callbacks->einfo
15293 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15294 htab->glink->name);
15295 return FALSE;
15296 }
15297 bfd_put_32 (dynobj, val, p);
15298 p += 4;
15299 /* .glink size. */
15300 p += 4;
15301 /* Augmentation. */
15302 p += 1;
15303 /* Ops. */
15304 p += 7;
15305 }
15306
15307 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15308 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15309 htab->glink_eh_frame,
15310 htab->glink_eh_frame->contents))
15311 return FALSE;
15312 }
15313
15314 /* We need to handle writing out multiple GOT sections ourselves,
15315 since we didn't add them to DYNOBJ. We know dynobj is the first
15316 bfd. */
15317 while ((dynobj = dynobj->link.next) != NULL)
15318 {
15319 asection *s;
15320
15321 if (!is_ppc64_elf (dynobj))
15322 continue;
15323
15324 s = ppc64_elf_tdata (dynobj)->got;
15325 if (s != NULL
15326 && s->size != 0
15327 && s->output_section != bfd_abs_section_ptr
15328 && !bfd_set_section_contents (output_bfd, s->output_section,
15329 s->contents, s->output_offset,
15330 s->size))
15331 return FALSE;
15332 s = ppc64_elf_tdata (dynobj)->relgot;
15333 if (s != NULL
15334 && s->size != 0
15335 && s->output_section != bfd_abs_section_ptr
15336 && !bfd_set_section_contents (output_bfd, s->output_section,
15337 s->contents, s->output_offset,
15338 s->size))
15339 return FALSE;
15340 }
15341
15342 return TRUE;
15343 }
15344
15345 #include "elf64-target.h"
15346
15347 /* FreeBSD support */
15348
15349 #undef TARGET_LITTLE_SYM
15350 #undef TARGET_LITTLE_NAME
15351
15352 #undef TARGET_BIG_SYM
15353 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15354 #undef TARGET_BIG_NAME
15355 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15356
15357 #undef ELF_OSABI
15358 #define ELF_OSABI ELFOSABI_FREEBSD
15359
15360 #undef elf64_bed
15361 #define elf64_bed elf64_powerpc_fbsd_bed
15362
15363 #include "elf64-target.h"
15364
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