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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2014 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 bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_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 0x1000
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_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
89 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
90
91 #define elf_backend_object_p ppc64_elf_object_p
92 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
93 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
94 #define elf_backend_write_core_note ppc64_elf_write_core_note
95 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
96 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
97 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
98 #define elf_backend_check_directives ppc64_elf_process_dot_syms
99 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
100 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
101 #define elf_backend_check_relocs ppc64_elf_check_relocs
102 #define elf_backend_gc_keep ppc64_elf_gc_keep
103 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
104 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
105 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
106 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
107 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
108 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
109 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
110 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
111 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
112 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
113 #define elf_backend_action_discarded ppc64_elf_action_discarded
114 #define elf_backend_relocate_section ppc64_elf_relocate_section
115 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
116 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
117 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
118 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
119 #define elf_backend_special_sections ppc64_elf_special_sections
120 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
121
122 /* The name of the dynamic interpreter. This is put in the .interp
123 section. */
124 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
125
126 /* The size in bytes of an entry in the procedure linkage table. */
127 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
128
129 /* The initial size of the plt reserved for the dynamic linker. */
130 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
131
132 /* Offsets to some stack save slots. */
133 #define STK_LR 16
134 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
135 /* This one is dodgy. ELFv2 does not have a linker word, so use the
136 CR save slot. Used only by optimised __tls_get_addr call stub,
137 relying on __tls_get_addr_opt not saving CR.. */
138 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
139
140 /* TOC base pointers offset from start of TOC. */
141 #define TOC_BASE_OFF 0x8000
142
143 /* Offset of tp and dtp pointers from start of TLS block. */
144 #define TP_OFFSET 0x7000
145 #define DTP_OFFSET 0x8000
146
147 /* .plt call stub instructions. The normal stub is like this, but
148 sometimes the .plt entry crosses a 64k boundary and we need to
149 insert an addi to adjust r11. */
150 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
151 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
152 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
153 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
154 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
155 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
156 #define BCTR 0x4e800420 /* bctr */
157
158 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
159 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
160 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
161
162 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
163 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
164 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
165 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
166 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
167 #define BNECTR 0x4ca20420 /* bnectr+ */
168 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
169
170 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
171 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
172 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
173
174 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
175
176 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
177 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
178
179 /* glink call stub instructions. We enter with the index in R0. */
180 #define GLINK_CALL_STUB_SIZE (16*4)
181 /* 0: */
182 /* .quad plt0-1f */
183 /* __glink: */
184 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
185 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
186 /* 1: */
187 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
188 /* ld %2,(0b-1b)(%11) */
189 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
190 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
191 /* ld %12,0(%11) */
192 /* ld %2,8(%11) */
193 /* mtctr %12 */
194 /* ld %11,16(%11) */
195 /* bctr */
196 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
197 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
198 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
199 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
200 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
201
202 /* Pad with this. */
203 #define NOP 0x60000000
204
205 /* Some other nops. */
206 #define CROR_151515 0x4def7b82
207 #define CROR_313131 0x4ffffb82
208
209 /* .glink entries for the first 32k functions are two instructions. */
210 #define LI_R0_0 0x38000000 /* li %r0,0 */
211 #define B_DOT 0x48000000 /* b . */
212
213 /* After that, we need two instructions to load the index, followed by
214 a branch. */
215 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
216 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
217
218 /* Instructions used by the save and restore reg functions. */
219 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
220 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
221 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
222 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
223 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
224 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
225 #define LI_R12_0 0x39800000 /* li %r12,0 */
226 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
227 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
228 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
229 #define BLR 0x4e800020 /* blr */
230
231 /* Since .opd is an array of descriptors and each entry will end up
232 with identical R_PPC64_RELATIVE relocs, there is really no need to
233 propagate .opd relocs; The dynamic linker should be taught to
234 relocate .opd without reloc entries. */
235 #ifndef NO_OPD_RELOCS
236 #define NO_OPD_RELOCS 0
237 #endif
238 \f
239 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
240
241 /* Relocation HOWTO's. */
242 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
243
244 static reloc_howto_type ppc64_elf_howto_raw[] = {
245 /* This reloc does nothing. */
246 HOWTO (R_PPC64_NONE, /* type */
247 0, /* rightshift */
248 2, /* size (0 = byte, 1 = short, 2 = long) */
249 32, /* bitsize */
250 FALSE, /* pc_relative */
251 0, /* bitpos */
252 complain_overflow_dont, /* complain_on_overflow */
253 bfd_elf_generic_reloc, /* special_function */
254 "R_PPC64_NONE", /* name */
255 FALSE, /* partial_inplace */
256 0, /* src_mask */
257 0, /* dst_mask */
258 FALSE), /* pcrel_offset */
259
260 /* A standard 32 bit relocation. */
261 HOWTO (R_PPC64_ADDR32, /* type */
262 0, /* rightshift */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
264 32, /* bitsize */
265 FALSE, /* pc_relative */
266 0, /* bitpos */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_PPC64_ADDR32", /* name */
270 FALSE, /* partial_inplace */
271 0, /* src_mask */
272 0xffffffff, /* dst_mask */
273 FALSE), /* pcrel_offset */
274
275 /* An absolute 26 bit branch; the lower two bits must be zero.
276 FIXME: we don't check that, we just clear them. */
277 HOWTO (R_PPC64_ADDR24, /* type */
278 0, /* rightshift */
279 2, /* size (0 = byte, 1 = short, 2 = long) */
280 26, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_bitfield, /* complain_on_overflow */
284 bfd_elf_generic_reloc, /* special_function */
285 "R_PPC64_ADDR24", /* name */
286 FALSE, /* partial_inplace */
287 0, /* src_mask */
288 0x03fffffc, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 /* A standard 16 bit relocation. */
292 HOWTO (R_PPC64_ADDR16, /* type */
293 0, /* rightshift */
294 1, /* size (0 = byte, 1 = short, 2 = long) */
295 16, /* 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_ADDR16", /* name */
301 FALSE, /* partial_inplace */
302 0, /* src_mask */
303 0xffff, /* dst_mask */
304 FALSE), /* pcrel_offset */
305
306 /* A 16 bit relocation without overflow. */
307 HOWTO (R_PPC64_ADDR16_LO, /* 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_dont,/* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_PPC64_ADDR16_LO", /* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0xffff, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 /* Bits 16-31 of an address. */
322 HOWTO (R_PPC64_ADDR16_HI, /* type */
323 16, /* rightshift */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_signed, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC64_ADDR16_HI", /* 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, plus 1 if the contents of the low 16
337 bits, treated as a signed number, is negative. */
338 HOWTO (R_PPC64_ADDR16_HA, /* type */
339 16, /* rightshift */
340 1, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 FALSE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_signed, /* complain_on_overflow */
345 ppc64_elf_ha_reloc, /* special_function */
346 "R_PPC64_ADDR16_HA", /* name */
347 FALSE, /* partial_inplace */
348 0, /* src_mask */
349 0xffff, /* dst_mask */
350 FALSE), /* pcrel_offset */
351
352 /* An absolute 16 bit branch; the lower two bits must be zero.
353 FIXME: we don't check that, we just clear them. */
354 HOWTO (R_PPC64_ADDR14, /* type */
355 0, /* rightshift */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 FALSE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_signed, /* complain_on_overflow */
361 ppc64_elf_branch_reloc, /* special_function */
362 "R_PPC64_ADDR14", /* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0x0000fffc, /* dst_mask */
366 FALSE), /* pcrel_offset */
367
368 /* An absolute 16 bit branch, for which bit 10 should be set to
369 indicate that the branch is expected to be taken. The lower two
370 bits must be zero. */
371 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
372 0, /* rightshift */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
374 16, /* bitsize */
375 FALSE, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_signed, /* complain_on_overflow */
378 ppc64_elf_brtaken_reloc, /* special_function */
379 "R_PPC64_ADDR14_BRTAKEN",/* name */
380 FALSE, /* partial_inplace */
381 0, /* src_mask */
382 0x0000fffc, /* dst_mask */
383 FALSE), /* pcrel_offset */
384
385 /* An absolute 16 bit branch, for which bit 10 should be set to
386 indicate that the branch is not expected to be taken. The lower
387 two bits must be zero. */
388 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
389 0, /* rightshift */
390 2, /* size (0 = byte, 1 = short, 2 = long) */
391 16, /* bitsize */
392 FALSE, /* pc_relative */
393 0, /* bitpos */
394 complain_overflow_signed, /* complain_on_overflow */
395 ppc64_elf_brtaken_reloc, /* special_function */
396 "R_PPC64_ADDR14_BRNTAKEN",/* name */
397 FALSE, /* partial_inplace */
398 0, /* src_mask */
399 0x0000fffc, /* dst_mask */
400 FALSE), /* pcrel_offset */
401
402 /* A relative 26 bit branch; the lower two bits must be zero. */
403 HOWTO (R_PPC64_REL24, /* type */
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 26, /* bitsize */
407 TRUE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_signed, /* complain_on_overflow */
410 ppc64_elf_branch_reloc, /* special_function */
411 "R_PPC64_REL24", /* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0x03fffffc, /* dst_mask */
415 TRUE), /* pcrel_offset */
416
417 /* A relative 16 bit branch; the lower two bits must be zero. */
418 HOWTO (R_PPC64_REL14, /* type */
419 0, /* rightshift */
420 2, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* 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_REL14", /* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0x0000fffc, /* dst_mask */
430 TRUE), /* pcrel_offset */
431
432 /* A relative 16 bit branch. Bit 10 should be set to indicate that
433 the branch is expected to be taken. The lower two bits must be
434 zero. */
435 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
436 0, /* rightshift */
437 2, /* size (0 = byte, 1 = short, 2 = long) */
438 16, /* bitsize */
439 TRUE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_signed, /* complain_on_overflow */
442 ppc64_elf_brtaken_reloc, /* special_function */
443 "R_PPC64_REL14_BRTAKEN", /* name */
444 FALSE, /* partial_inplace */
445 0, /* src_mask */
446 0x0000fffc, /* dst_mask */
447 TRUE), /* pcrel_offset */
448
449 /* A relative 16 bit branch. Bit 10 should be set to indicate that
450 the branch is not expected to be taken. The lower two bits must
451 be zero. */
452 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
453 0, /* rightshift */
454 2, /* size (0 = byte, 1 = short, 2 = long) */
455 16, /* bitsize */
456 TRUE, /* pc_relative */
457 0, /* bitpos */
458 complain_overflow_signed, /* complain_on_overflow */
459 ppc64_elf_brtaken_reloc, /* special_function */
460 "R_PPC64_REL14_BRNTAKEN",/* name */
461 FALSE, /* partial_inplace */
462 0, /* src_mask */
463 0x0000fffc, /* dst_mask */
464 TRUE), /* pcrel_offset */
465
466 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
467 symbol. */
468 HOWTO (R_PPC64_GOT16, /* type */
469 0, /* rightshift */
470 1, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_signed, /* complain_on_overflow */
475 ppc64_elf_unhandled_reloc, /* special_function */
476 "R_PPC64_GOT16", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0xffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
483 the symbol. */
484 HOWTO (R_PPC64_GOT16_LO, /* type */
485 0, /* rightshift */
486 1, /* size (0 = byte, 1 = short, 2 = long) */
487 16, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_dont, /* complain_on_overflow */
491 ppc64_elf_unhandled_reloc, /* special_function */
492 "R_PPC64_GOT16_LO", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
499 the symbol. */
500 HOWTO (R_PPC64_GOT16_HI, /* type */
501 16, /* rightshift */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
503 16, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_signed,/* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16_HI", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
515 the symbol. */
516 HOWTO (R_PPC64_GOT16_HA, /* type */
517 16, /* rightshift */
518 1, /* size (0 = byte, 1 = short, 2 = long) */
519 16, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_signed,/* complain_on_overflow */
523 ppc64_elf_unhandled_reloc, /* special_function */
524 "R_PPC64_GOT16_HA", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* This is used only by the dynamic linker. The symbol should exist
531 both in the object being run and in some shared library. The
532 dynamic linker copies the data addressed by the symbol from the
533 shared library into the object, because the object being
534 run has to have the data at some particular address. */
535 HOWTO (R_PPC64_COPY, /* type */
536 0, /* rightshift */
537 0, /* this one is variable size */
538 0, /* bitsize */
539 FALSE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_dont, /* complain_on_overflow */
542 ppc64_elf_unhandled_reloc, /* special_function */
543 "R_PPC64_COPY", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 0, /* dst_mask */
547 FALSE), /* pcrel_offset */
548
549 /* Like R_PPC64_ADDR64, but used when setting global offset table
550 entries. */
551 HOWTO (R_PPC64_GLOB_DAT, /* type */
552 0, /* rightshift */
553 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
554 64, /* bitsize */
555 FALSE, /* pc_relative */
556 0, /* bitpos */
557 complain_overflow_dont, /* complain_on_overflow */
558 ppc64_elf_unhandled_reloc, /* special_function */
559 "R_PPC64_GLOB_DAT", /* name */
560 FALSE, /* partial_inplace */
561 0, /* src_mask */
562 ONES (64), /* dst_mask */
563 FALSE), /* pcrel_offset */
564
565 /* Created by the link editor. Marks a procedure linkage table
566 entry for a symbol. */
567 HOWTO (R_PPC64_JMP_SLOT, /* type */
568 0, /* rightshift */
569 0, /* size (0 = byte, 1 = short, 2 = long) */
570 0, /* bitsize */
571 FALSE, /* pc_relative */
572 0, /* bitpos */
573 complain_overflow_dont, /* complain_on_overflow */
574 ppc64_elf_unhandled_reloc, /* special_function */
575 "R_PPC64_JMP_SLOT", /* name */
576 FALSE, /* partial_inplace */
577 0, /* src_mask */
578 0, /* dst_mask */
579 FALSE), /* pcrel_offset */
580
581 /* Used only by the dynamic linker. When the object is run, this
582 doubleword64 is set to the load address of the object, plus the
583 addend. */
584 HOWTO (R_PPC64_RELATIVE, /* type */
585 0, /* rightshift */
586 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
587 64, /* bitsize */
588 FALSE, /* pc_relative */
589 0, /* bitpos */
590 complain_overflow_dont, /* complain_on_overflow */
591 bfd_elf_generic_reloc, /* special_function */
592 "R_PPC64_RELATIVE", /* name */
593 FALSE, /* partial_inplace */
594 0, /* src_mask */
595 ONES (64), /* dst_mask */
596 FALSE), /* pcrel_offset */
597
598 /* Like R_PPC64_ADDR32, but may be unaligned. */
599 HOWTO (R_PPC64_UADDR32, /* type */
600 0, /* rightshift */
601 2, /* size (0 = byte, 1 = short, 2 = long) */
602 32, /* bitsize */
603 FALSE, /* pc_relative */
604 0, /* bitpos */
605 complain_overflow_bitfield, /* complain_on_overflow */
606 bfd_elf_generic_reloc, /* special_function */
607 "R_PPC64_UADDR32", /* name */
608 FALSE, /* partial_inplace */
609 0, /* src_mask */
610 0xffffffff, /* dst_mask */
611 FALSE), /* pcrel_offset */
612
613 /* Like R_PPC64_ADDR16, but may be unaligned. */
614 HOWTO (R_PPC64_UADDR16, /* type */
615 0, /* rightshift */
616 1, /* size (0 = byte, 1 = short, 2 = long) */
617 16, /* 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_UADDR16", /* name */
623 FALSE, /* partial_inplace */
624 0, /* src_mask */
625 0xffff, /* dst_mask */
626 FALSE), /* pcrel_offset */
627
628 /* 32-bit PC relative. */
629 HOWTO (R_PPC64_REL32, /* type */
630 0, /* rightshift */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
632 32, /* bitsize */
633 TRUE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_signed, /* complain_on_overflow */
636 bfd_elf_generic_reloc, /* special_function */
637 "R_PPC64_REL32", /* name */
638 FALSE, /* partial_inplace */
639 0, /* src_mask */
640 0xffffffff, /* dst_mask */
641 TRUE), /* pcrel_offset */
642
643 /* 32-bit relocation to the symbol's procedure linkage table. */
644 HOWTO (R_PPC64_PLT32, /* type */
645 0, /* rightshift */
646 2, /* size (0 = byte, 1 = short, 2 = long) */
647 32, /* bitsize */
648 FALSE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_bitfield, /* complain_on_overflow */
651 ppc64_elf_unhandled_reloc, /* special_function */
652 "R_PPC64_PLT32", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffffffff, /* dst_mask */
656 FALSE), /* pcrel_offset */
657
658 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
659 FIXME: R_PPC64_PLTREL32 not supported. */
660 HOWTO (R_PPC64_PLTREL32, /* type */
661 0, /* rightshift */
662 2, /* size (0 = byte, 1 = short, 2 = long) */
663 32, /* bitsize */
664 TRUE, /* pc_relative */
665 0, /* bitpos */
666 complain_overflow_signed, /* complain_on_overflow */
667 bfd_elf_generic_reloc, /* special_function */
668 "R_PPC64_PLTREL32", /* name */
669 FALSE, /* partial_inplace */
670 0, /* src_mask */
671 0xffffffff, /* dst_mask */
672 TRUE), /* pcrel_offset */
673
674 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
675 the symbol. */
676 HOWTO (R_PPC64_PLT16_LO, /* type */
677 0, /* rightshift */
678 1, /* size (0 = byte, 1 = short, 2 = long) */
679 16, /* bitsize */
680 FALSE, /* pc_relative */
681 0, /* bitpos */
682 complain_overflow_dont, /* complain_on_overflow */
683 ppc64_elf_unhandled_reloc, /* special_function */
684 "R_PPC64_PLT16_LO", /* name */
685 FALSE, /* partial_inplace */
686 0, /* src_mask */
687 0xffff, /* dst_mask */
688 FALSE), /* pcrel_offset */
689
690 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
691 the symbol. */
692 HOWTO (R_PPC64_PLT16_HI, /* type */
693 16, /* rightshift */
694 1, /* size (0 = byte, 1 = short, 2 = long) */
695 16, /* bitsize */
696 FALSE, /* pc_relative */
697 0, /* bitpos */
698 complain_overflow_signed, /* complain_on_overflow */
699 ppc64_elf_unhandled_reloc, /* special_function */
700 "R_PPC64_PLT16_HI", /* name */
701 FALSE, /* partial_inplace */
702 0, /* src_mask */
703 0xffff, /* dst_mask */
704 FALSE), /* pcrel_offset */
705
706 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
707 the symbol. */
708 HOWTO (R_PPC64_PLT16_HA, /* type */
709 16, /* rightshift */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
711 16, /* bitsize */
712 FALSE, /* pc_relative */
713 0, /* bitpos */
714 complain_overflow_signed, /* complain_on_overflow */
715 ppc64_elf_unhandled_reloc, /* special_function */
716 "R_PPC64_PLT16_HA", /* name */
717 FALSE, /* partial_inplace */
718 0, /* src_mask */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
721
722 /* 16-bit section relative relocation. */
723 HOWTO (R_PPC64_SECTOFF, /* type */
724 0, /* 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_sectoff_reloc, /* special_function */
731 "R_PPC64_SECTOFF", /* name */
732 FALSE, /* partial_inplace */
733 0, /* src_mask */
734 0xffff, /* dst_mask */
735 FALSE), /* pcrel_offset */
736
737 /* Like R_PPC64_SECTOFF, but no overflow warning. */
738 HOWTO (R_PPC64_SECTOFF_LO, /* 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_dont, /* complain_on_overflow */
745 ppc64_elf_sectoff_reloc, /* special_function */
746 "R_PPC64_SECTOFF_LO", /* name */
747 FALSE, /* partial_inplace */
748 0, /* src_mask */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
751
752 /* 16-bit upper half section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF_HI, /* type */
754 16, /* rightshift */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
756 16, /* bitsize */
757 FALSE, /* pc_relative */
758 0, /* bitpos */
759 complain_overflow_signed, /* complain_on_overflow */
760 ppc64_elf_sectoff_reloc, /* special_function */
761 "R_PPC64_SECTOFF_HI", /* name */
762 FALSE, /* partial_inplace */
763 0, /* src_mask */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
766
767 /* 16-bit upper half adjusted section relative relocation. */
768 HOWTO (R_PPC64_SECTOFF_HA, /* 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_ha_reloc, /* special_function */
776 "R_PPC64_SECTOFF_HA", /* name */
777 FALSE, /* partial_inplace */
778 0, /* src_mask */
779 0xffff, /* dst_mask */
780 FALSE), /* pcrel_offset */
781
782 /* Like R_PPC64_REL24 without touching the two least significant bits. */
783 HOWTO (R_PPC64_REL30, /* type */
784 2, /* rightshift */
785 2, /* size (0 = byte, 1 = short, 2 = long) */
786 30, /* bitsize */
787 TRUE, /* pc_relative */
788 0, /* bitpos */
789 complain_overflow_dont, /* complain_on_overflow */
790 bfd_elf_generic_reloc, /* special_function */
791 "R_PPC64_REL30", /* name */
792 FALSE, /* partial_inplace */
793 0, /* src_mask */
794 0xfffffffc, /* dst_mask */
795 TRUE), /* pcrel_offset */
796
797 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
798
799 /* A standard 64-bit relocation. */
800 HOWTO (R_PPC64_ADDR64, /* type */
801 0, /* rightshift */
802 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
803 64, /* bitsize */
804 FALSE, /* pc_relative */
805 0, /* bitpos */
806 complain_overflow_dont, /* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_PPC64_ADDR64", /* name */
809 FALSE, /* partial_inplace */
810 0, /* src_mask */
811 ONES (64), /* dst_mask */
812 FALSE), /* pcrel_offset */
813
814 /* The bits 32-47 of an address. */
815 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
816 32, /* rightshift */
817 1, /* size (0 = byte, 1 = short, 2 = long) */
818 16, /* 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_ADDR16_HIGHER", /* name */
824 FALSE, /* partial_inplace */
825 0, /* src_mask */
826 0xffff, /* dst_mask */
827 FALSE), /* pcrel_offset */
828
829 /* The bits 32-47 of an address, plus 1 if the contents of the low
830 16 bits, treated as a signed number, is negative. */
831 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
832 32, /* rightshift */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
834 16, /* bitsize */
835 FALSE, /* pc_relative */
836 0, /* bitpos */
837 complain_overflow_dont, /* complain_on_overflow */
838 ppc64_elf_ha_reloc, /* special_function */
839 "R_PPC64_ADDR16_HIGHERA", /* name */
840 FALSE, /* partial_inplace */
841 0, /* src_mask */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
844
845 /* The bits 48-63 of an address. */
846 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
847 48, /* 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 bfd_elf_generic_reloc, /* special_function */
854 "R_PPC64_ADDR16_HIGHEST", /* 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, plus 1 if the contents of the low
861 16 bits, treated as a signed number, is negative. */
862 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
863 48, /* rightshift */
864 1, /* size (0 = byte, 1 = short, 2 = long) */
865 16, /* bitsize */
866 FALSE, /* pc_relative */
867 0, /* bitpos */
868 complain_overflow_dont, /* complain_on_overflow */
869 ppc64_elf_ha_reloc, /* special_function */
870 "R_PPC64_ADDR16_HIGHESTA", /* name */
871 FALSE, /* partial_inplace */
872 0, /* src_mask */
873 0xffff, /* dst_mask */
874 FALSE), /* pcrel_offset */
875
876 /* Like ADDR64, but may be unaligned. */
877 HOWTO (R_PPC64_UADDR64, /* type */
878 0, /* rightshift */
879 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
880 64, /* bitsize */
881 FALSE, /* pc_relative */
882 0, /* bitpos */
883 complain_overflow_dont, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC64_UADDR64", /* name */
886 FALSE, /* partial_inplace */
887 0, /* src_mask */
888 ONES (64), /* dst_mask */
889 FALSE), /* pcrel_offset */
890
891 /* 64-bit relative relocation. */
892 HOWTO (R_PPC64_REL64, /* type */
893 0, /* rightshift */
894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
895 64, /* bitsize */
896 TRUE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 bfd_elf_generic_reloc, /* special_function */
900 "R_PPC64_REL64", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 ONES (64), /* dst_mask */
904 TRUE), /* pcrel_offset */
905
906 /* 64-bit relocation to the symbol's procedure linkage table. */
907 HOWTO (R_PPC64_PLT64, /* type */
908 0, /* rightshift */
909 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
910 64, /* bitsize */
911 FALSE, /* pc_relative */
912 0, /* bitpos */
913 complain_overflow_dont, /* complain_on_overflow */
914 ppc64_elf_unhandled_reloc, /* special_function */
915 "R_PPC64_PLT64", /* name */
916 FALSE, /* partial_inplace */
917 0, /* src_mask */
918 ONES (64), /* dst_mask */
919 FALSE), /* pcrel_offset */
920
921 /* 64-bit PC relative relocation to the symbol's procedure linkage
922 table. */
923 /* FIXME: R_PPC64_PLTREL64 not supported. */
924 HOWTO (R_PPC64_PLTREL64, /* type */
925 0, /* rightshift */
926 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
927 64, /* bitsize */
928 TRUE, /* pc_relative */
929 0, /* bitpos */
930 complain_overflow_dont, /* complain_on_overflow */
931 ppc64_elf_unhandled_reloc, /* special_function */
932 "R_PPC64_PLTREL64", /* name */
933 FALSE, /* partial_inplace */
934 0, /* src_mask */
935 ONES (64), /* dst_mask */
936 TRUE), /* pcrel_offset */
937
938 /* 16 bit TOC-relative relocation. */
939
940 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
941 HOWTO (R_PPC64_TOC16, /* type */
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_signed, /* complain_on_overflow */
948 ppc64_elf_toc_reloc, /* special_function */
949 "R_PPC64_TOC16", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* 16 bit TOC-relative relocation without overflow. */
956
957 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
958 HOWTO (R_PPC64_TOC16_LO, /* type */
959 0, /* rightshift */
960 1, /* size (0 = byte, 1 = short, 2 = long) */
961 16, /* bitsize */
962 FALSE, /* pc_relative */
963 0, /* bitpos */
964 complain_overflow_dont, /* complain_on_overflow */
965 ppc64_elf_toc_reloc, /* special_function */
966 "R_PPC64_TOC16_LO", /* name */
967 FALSE, /* partial_inplace */
968 0, /* src_mask */
969 0xffff, /* dst_mask */
970 FALSE), /* pcrel_offset */
971
972 /* 16 bit TOC-relative relocation, high 16 bits. */
973
974 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
975 HOWTO (R_PPC64_TOC16_HI, /* type */
976 16, /* rightshift */
977 1, /* size (0 = byte, 1 = short, 2 = long) */
978 16, /* bitsize */
979 FALSE, /* pc_relative */
980 0, /* bitpos */
981 complain_overflow_signed, /* complain_on_overflow */
982 ppc64_elf_toc_reloc, /* special_function */
983 "R_PPC64_TOC16_HI", /* name */
984 FALSE, /* partial_inplace */
985 0, /* src_mask */
986 0xffff, /* dst_mask */
987 FALSE), /* pcrel_offset */
988
989 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
990 contents of the low 16 bits, treated as a signed number, is
991 negative. */
992
993 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
994 HOWTO (R_PPC64_TOC16_HA, /* type */
995 16, /* rightshift */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
997 16, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_signed, /* complain_on_overflow */
1001 ppc64_elf_toc_ha_reloc, /* special_function */
1002 "R_PPC64_TOC16_HA", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1009
1010 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1011 HOWTO (R_PPC64_TOC, /* type */
1012 0, /* rightshift */
1013 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1014 64, /* bitsize */
1015 FALSE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_dont, /* complain_on_overflow */
1018 ppc64_elf_toc64_reloc, /* special_function */
1019 "R_PPC64_TOC", /* name */
1020 FALSE, /* partial_inplace */
1021 0, /* src_mask */
1022 ONES (64), /* dst_mask */
1023 FALSE), /* pcrel_offset */
1024
1025 /* Like R_PPC64_GOT16, but also informs the link editor that the
1026 value to relocate may (!) refer to a PLT entry which the link
1027 editor (a) may replace with the symbol value. If the link editor
1028 is unable to fully resolve the symbol, it may (b) create a PLT
1029 entry and store the address to the new PLT entry in the GOT.
1030 This permits lazy resolution of function symbols at run time.
1031 The link editor may also skip all of this and just (c) emit a
1032 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1033 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1034 HOWTO (R_PPC64_PLTGOT16, /* type */
1035 0, /* rightshift */
1036 1, /* size (0 = byte, 1 = short, 2 = long) */
1037 16, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_signed, /* complain_on_overflow */
1041 ppc64_elf_unhandled_reloc, /* special_function */
1042 "R_PPC64_PLTGOT16", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 0xffff, /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_PLTGOT16, but without overflow. */
1049 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1050 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_dont, /* complain_on_overflow */
1057 ppc64_elf_unhandled_reloc, /* special_function */
1058 "R_PPC64_PLTGOT16_LO", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1065 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1066 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1067 16, /* rightshift */
1068 1, /* size (0 = byte, 1 = short, 2 = long) */
1069 16, /* bitsize */
1070 FALSE, /* pc_relative */
1071 0, /* bitpos */
1072 complain_overflow_signed, /* complain_on_overflow */
1073 ppc64_elf_unhandled_reloc, /* special_function */
1074 "R_PPC64_PLTGOT16_HI", /* name */
1075 FALSE, /* partial_inplace */
1076 0, /* src_mask */
1077 0xffff, /* dst_mask */
1078 FALSE), /* pcrel_offset */
1079
1080 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1081 1 if the contents of the low 16 bits, treated as a signed number,
1082 is negative. */
1083 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1084 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1085 16, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_signed, /* complain_on_overflow */
1091 ppc64_elf_unhandled_reloc, /* special_function */
1092 "R_PPC64_PLTGOT16_HA", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xffff, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1099 HOWTO (R_PPC64_ADDR16_DS, /* type */
1100 0, /* 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 bfd_elf_generic_reloc, /* special_function */
1107 "R_PPC64_ADDR16_DS", /* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xfffc, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_ADDR16_LO_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_dont,/* complain_on_overflow */
1121 bfd_elf_generic_reloc, /* special_function */
1122 "R_PPC64_ADDR16_LO_DS",/* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xfffc, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_GOT16_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_signed, /* complain_on_overflow */
1136 ppc64_elf_unhandled_reloc, /* special_function */
1137 "R_PPC64_GOT16_DS", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_GOT16_LO_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_dont, /* complain_on_overflow */
1151 ppc64_elf_unhandled_reloc, /* special_function */
1152 "R_PPC64_GOT16_LO_DS", /* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_PLT16_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_PLT16_LO_DS", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_SECTOFF_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_signed, /* complain_on_overflow */
1181 ppc64_elf_sectoff_reloc, /* special_function */
1182 "R_PPC64_SECTOFF_DS", /* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_SECTOFF_LO_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_dont, /* complain_on_overflow */
1196 ppc64_elf_sectoff_reloc, /* special_function */
1197 "R_PPC64_SECTOFF_LO_DS",/* name */
1198 FALSE, /* partial_inplace */
1199 0, /* src_mask */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1202
1203 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_TOC16_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_signed, /* complain_on_overflow */
1211 ppc64_elf_toc_reloc, /* special_function */
1212 "R_PPC64_TOC16_DS", /* name */
1213 FALSE, /* partial_inplace */
1214 0, /* src_mask */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1217
1218 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1219 HOWTO (R_PPC64_TOC16_LO_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_dont, /* complain_on_overflow */
1226 ppc64_elf_toc_reloc, /* special_function */
1227 "R_PPC64_TOC16_LO_DS", /* name */
1228 FALSE, /* partial_inplace */
1229 0, /* src_mask */
1230 0xfffc, /* dst_mask */
1231 FALSE), /* pcrel_offset */
1232
1233 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1234 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1235 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1236 0, /* rightshift */
1237 1, /* size (0 = byte, 1 = short, 2 = long) */
1238 16, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_signed, /* complain_on_overflow */
1242 ppc64_elf_unhandled_reloc, /* special_function */
1243 "R_PPC64_PLTGOT16_DS", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xfffc, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1250 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1251 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1252 0, /* rightshift */
1253 1, /* size (0 = byte, 1 = short, 2 = long) */
1254 16, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 ppc64_elf_unhandled_reloc, /* special_function */
1259 "R_PPC64_PLTGOT16_LO_DS",/* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0xfffc, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 /* Marker relocs for TLS. */
1266 HOWTO (R_PPC64_TLS,
1267 0, /* rightshift */
1268 2, /* size (0 = byte, 1 = short, 2 = long) */
1269 32, /* bitsize */
1270 FALSE, /* pc_relative */
1271 0, /* bitpos */
1272 complain_overflow_dont, /* complain_on_overflow */
1273 bfd_elf_generic_reloc, /* special_function */
1274 "R_PPC64_TLS", /* name */
1275 FALSE, /* partial_inplace */
1276 0, /* src_mask */
1277 0, /* dst_mask */
1278 FALSE), /* pcrel_offset */
1279
1280 HOWTO (R_PPC64_TLSGD,
1281 0, /* rightshift */
1282 2, /* size (0 = byte, 1 = short, 2 = long) */
1283 32, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC64_TLSGD", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 HOWTO (R_PPC64_TLSLD,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLSLD", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TOCSAVE,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TOCSAVE", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 /* Computes the load module index of the load module that contains the
1323 definition of its TLS sym. */
1324 HOWTO (R_PPC64_DTPMOD64,
1325 0, /* rightshift */
1326 4, /* size (0 = byte, 1 = short, 2 = long) */
1327 64, /* bitsize */
1328 FALSE, /* pc_relative */
1329 0, /* bitpos */
1330 complain_overflow_dont, /* complain_on_overflow */
1331 ppc64_elf_unhandled_reloc, /* special_function */
1332 "R_PPC64_DTPMOD64", /* name */
1333 FALSE, /* partial_inplace */
1334 0, /* src_mask */
1335 ONES (64), /* dst_mask */
1336 FALSE), /* pcrel_offset */
1337
1338 /* Computes a dtv-relative displacement, the difference between the value
1339 of sym+add and the base address of the thread-local storage block that
1340 contains the definition of sym, minus 0x8000. */
1341 HOWTO (R_PPC64_DTPREL64,
1342 0, /* rightshift */
1343 4, /* size (0 = byte, 1 = short, 2 = long) */
1344 64, /* bitsize */
1345 FALSE, /* pc_relative */
1346 0, /* bitpos */
1347 complain_overflow_dont, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL64", /* name */
1350 FALSE, /* partial_inplace */
1351 0, /* src_mask */
1352 ONES (64), /* dst_mask */
1353 FALSE), /* pcrel_offset */
1354
1355 /* A 16 bit dtprel reloc. */
1356 HOWTO (R_PPC64_DTPREL16,
1357 0, /* rightshift */
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_signed, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Like DTPREL16, but no overflow. */
1371 HOWTO (R_PPC64_DTPREL16_LO,
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_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_LO", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1386 HOWTO (R_PPC64_DTPREL16_HI,
1387 16, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_signed, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HI", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1401 HOWTO (R_PPC64_DTPREL16_HA,
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_HA", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HIGHER,
1417 32, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HIGHER", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HIGHERA,
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_HIGHERA", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1447 48, /* 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_HIGHEST", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1461 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
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_HIGHESTA", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0xffff, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* Like DTPREL16, but for insns with a DS field. */
1476 HOWTO (R_PPC64_DTPREL16_DS,
1477 0, /* rightshift */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1479 16, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_signed, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_DS", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0xfffc, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Like DTPREL16_DS, but no overflow. */
1491 HOWTO (R_PPC64_DTPREL16_LO_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_dont, /* complain_on_overflow */
1498 ppc64_elf_unhandled_reloc, /* special_function */
1499 "R_PPC64_DTPREL16_LO_DS", /* name */
1500 FALSE, /* partial_inplace */
1501 0, /* src_mask */
1502 0xfffc, /* dst_mask */
1503 FALSE), /* pcrel_offset */
1504
1505 /* Computes a tp-relative displacement, the difference between the value of
1506 sym+add and the value of the thread pointer (r13). */
1507 HOWTO (R_PPC64_TPREL64,
1508 0, /* rightshift */
1509 4, /* size (0 = byte, 1 = short, 2 = long) */
1510 64, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_dont, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL64", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 ONES (64), /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* A 16 bit tprel reloc. */
1522 HOWTO (R_PPC64_TPREL16,
1523 0, /* rightshift */
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_signed, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* Like TPREL16, but no overflow. */
1537 HOWTO (R_PPC64_TPREL16_LO,
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_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_LO", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* Like TPREL16_LO, but next higher group of 16 bits. */
1552 HOWTO (R_PPC64_TPREL16_HI,
1553 16, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_signed, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HI", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16_HI, but adjust for low 16 bits. */
1567 HOWTO (R_PPC64_TPREL16_HA,
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_HA", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_HI, but next higher group of 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HIGHER,
1583 32, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HIGHER", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HIGHERA,
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_HIGHERA", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHEST,
1613 48, /* 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_HIGHEST", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1627 HOWTO (R_PPC64_TPREL16_HIGHESTA,
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_HIGHESTA", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xffff, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Like TPREL16, but for insns with a DS field. */
1642 HOWTO (R_PPC64_TPREL16_DS,
1643 0, /* rightshift */
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1645 16, /* bitsize */
1646 FALSE, /* pc_relative */
1647 0, /* bitpos */
1648 complain_overflow_signed, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_DS", /* name */
1651 FALSE, /* partial_inplace */
1652 0, /* src_mask */
1653 0xfffc, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1655
1656 /* Like TPREL16_DS, but no overflow. */
1657 HOWTO (R_PPC64_TPREL16_LO_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_dont, /* complain_on_overflow */
1664 ppc64_elf_unhandled_reloc, /* special_function */
1665 "R_PPC64_TPREL16_LO_DS", /* name */
1666 FALSE, /* partial_inplace */
1667 0, /* src_mask */
1668 0xfffc, /* dst_mask */
1669 FALSE), /* pcrel_offset */
1670
1671 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1672 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1673 to the first entry relative to the TOC base (r2). */
1674 HOWTO (R_PPC64_GOT_TLSGD16,
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 ppc64_elf_unhandled_reloc, /* special_function */
1682 "R_PPC64_GOT_TLSGD16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* Like GOT_TLSGD16, but no overflow. */
1689 HOWTO (R_PPC64_GOT_TLSGD16_LO,
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_dont, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSGD16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1702
1703 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1704 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 FALSE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_signed, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1717
1718 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1719 HOWTO (R_PPC64_GOT_TLSGD16_HA,
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_HA", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 FALSE), /* pcrel_offset */
1732
1733 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1734 with values (sym+add)@dtpmod and zero, and computes the offset to the
1735 first entry relative to the TOC base (r2). */
1736 HOWTO (R_PPC64_GOT_TLSLD16,
1737 0, /* rightshift */
1738 1, /* size (0 = byte, 1 = short, 2 = long) */
1739 16, /* bitsize */
1740 FALSE, /* pc_relative */
1741 0, /* bitpos */
1742 complain_overflow_signed, /* complain_on_overflow */
1743 ppc64_elf_unhandled_reloc, /* special_function */
1744 "R_PPC64_GOT_TLSLD16", /* name */
1745 FALSE, /* partial_inplace */
1746 0, /* src_mask */
1747 0xffff, /* dst_mask */
1748 FALSE), /* pcrel_offset */
1749
1750 /* Like GOT_TLSLD16, but no overflow. */
1751 HOWTO (R_PPC64_GOT_TLSLD16_LO,
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_dont, /* complain_on_overflow */
1758 ppc64_elf_unhandled_reloc, /* special_function */
1759 "R_PPC64_GOT_TLSLD16_LO", /* name */
1760 FALSE, /* partial_inplace */
1761 0, /* src_mask */
1762 0xffff, /* dst_mask */
1763 FALSE), /* pcrel_offset */
1764
1765 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1766 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1767 16, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_signed, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16_HI", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779
1780 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1781 HOWTO (R_PPC64_GOT_TLSLD16_HA,
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_HA", /* name */
1790 FALSE, /* partial_inplace */
1791 0, /* src_mask */
1792 0xffff, /* dst_mask */
1793 FALSE), /* pcrel_offset */
1794
1795 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1796 the offset to the entry relative to the TOC base (r2). */
1797 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1798 0, /* rightshift */
1799 1, /* size (0 = byte, 1 = short, 2 = long) */
1800 16, /* bitsize */
1801 FALSE, /* pc_relative */
1802 0, /* bitpos */
1803 complain_overflow_signed, /* complain_on_overflow */
1804 ppc64_elf_unhandled_reloc, /* special_function */
1805 "R_PPC64_GOT_DTPREL16_DS", /* name */
1806 FALSE, /* partial_inplace */
1807 0, /* src_mask */
1808 0xfffc, /* dst_mask */
1809 FALSE), /* pcrel_offset */
1810
1811 /* Like GOT_DTPREL16_DS, but no overflow. */
1812 HOWTO (R_PPC64_GOT_DTPREL16_LO_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_dont, /* complain_on_overflow */
1819 ppc64_elf_unhandled_reloc, /* special_function */
1820 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1821 FALSE, /* partial_inplace */
1822 0, /* src_mask */
1823 0xfffc, /* dst_mask */
1824 FALSE), /* pcrel_offset */
1825
1826 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1827 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1828 16, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1830 16, /* bitsize */
1831 FALSE, /* pc_relative */
1832 0, /* bitpos */
1833 complain_overflow_signed, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_HI", /* name */
1836 FALSE, /* partial_inplace */
1837 0, /* src_mask */
1838 0xffff, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1840
1841 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1842 HOWTO (R_PPC64_GOT_DTPREL16_HA,
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_HA", /* name */
1851 FALSE, /* partial_inplace */
1852 0, /* src_mask */
1853 0xffff, /* dst_mask */
1854 FALSE), /* pcrel_offset */
1855
1856 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1857 offset to the entry relative to the TOC base (r2). */
1858 HOWTO (R_PPC64_GOT_TPREL16_DS,
1859 0, /* rightshift */
1860 1, /* size (0 = byte, 1 = short, 2 = long) */
1861 16, /* bitsize */
1862 FALSE, /* pc_relative */
1863 0, /* bitpos */
1864 complain_overflow_signed, /* complain_on_overflow */
1865 ppc64_elf_unhandled_reloc, /* special_function */
1866 "R_PPC64_GOT_TPREL16_DS", /* name */
1867 FALSE, /* partial_inplace */
1868 0, /* src_mask */
1869 0xfffc, /* dst_mask */
1870 FALSE), /* pcrel_offset */
1871
1872 /* Like GOT_TPREL16_DS, but no overflow. */
1873 HOWTO (R_PPC64_GOT_TPREL16_LO_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_dont, /* complain_on_overflow */
1880 ppc64_elf_unhandled_reloc, /* special_function */
1881 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1882 FALSE, /* partial_inplace */
1883 0, /* src_mask */
1884 0xfffc, /* dst_mask */
1885 FALSE), /* pcrel_offset */
1886
1887 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1888 HOWTO (R_PPC64_GOT_TPREL16_HI,
1889 16, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1891 16, /* bitsize */
1892 FALSE, /* pc_relative */
1893 0, /* bitpos */
1894 complain_overflow_signed, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_HI", /* name */
1897 FALSE, /* partial_inplace */
1898 0, /* src_mask */
1899 0xffff, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1901
1902 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1903 HOWTO (R_PPC64_GOT_TPREL16_HA,
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_HA", /* name */
1912 FALSE, /* partial_inplace */
1913 0, /* src_mask */
1914 0xffff, /* dst_mask */
1915 FALSE), /* pcrel_offset */
1916
1917 HOWTO (R_PPC64_JMP_IREL, /* type */
1918 0, /* rightshift */
1919 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1920 0, /* bitsize */
1921 FALSE, /* pc_relative */
1922 0, /* bitpos */
1923 complain_overflow_dont, /* complain_on_overflow */
1924 ppc64_elf_unhandled_reloc, /* special_function */
1925 "R_PPC64_JMP_IREL", /* name */
1926 FALSE, /* partial_inplace */
1927 0, /* src_mask */
1928 0, /* dst_mask */
1929 FALSE), /* pcrel_offset */
1930
1931 HOWTO (R_PPC64_IRELATIVE, /* type */
1932 0, /* rightshift */
1933 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1934 64, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_dont, /* complain_on_overflow */
1938 bfd_elf_generic_reloc, /* special_function */
1939 "R_PPC64_IRELATIVE", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 ONES (64), /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 /* A 16 bit relative relocation. */
1946 HOWTO (R_PPC64_REL16, /* type */
1947 0, /* rightshift */
1948 1, /* size (0 = byte, 1 = short, 2 = long) */
1949 16, /* bitsize */
1950 TRUE, /* pc_relative */
1951 0, /* bitpos */
1952 complain_overflow_signed, /* complain_on_overflow */
1953 bfd_elf_generic_reloc, /* special_function */
1954 "R_PPC64_REL16", /* name */
1955 FALSE, /* partial_inplace */
1956 0, /* src_mask */
1957 0xffff, /* dst_mask */
1958 TRUE), /* pcrel_offset */
1959
1960 /* A 16 bit relative relocation without overflow. */
1961 HOWTO (R_PPC64_REL16_LO, /* 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_dont,/* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_REL16_LO", /* name */
1970 FALSE, /* partial_inplace */
1971 0, /* src_mask */
1972 0xffff, /* dst_mask */
1973 TRUE), /* pcrel_offset */
1974
1975 /* The high order 16 bits of a relative address. */
1976 HOWTO (R_PPC64_REL16_HI, /* type */
1977 16, /* rightshift */
1978 1, /* size (0 = byte, 1 = short, 2 = long) */
1979 16, /* bitsize */
1980 TRUE, /* pc_relative */
1981 0, /* bitpos */
1982 complain_overflow_signed, /* complain_on_overflow */
1983 bfd_elf_generic_reloc, /* special_function */
1984 "R_PPC64_REL16_HI", /* 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, plus 1 if the contents of
1991 the low 16 bits, treated as a signed number, is negative. */
1992 HOWTO (R_PPC64_REL16_HA, /* type */
1993 16, /* rightshift */
1994 1, /* size (0 = byte, 1 = short, 2 = long) */
1995 16, /* bitsize */
1996 TRUE, /* pc_relative */
1997 0, /* bitpos */
1998 complain_overflow_signed, /* complain_on_overflow */
1999 ppc64_elf_ha_reloc, /* special_function */
2000 "R_PPC64_REL16_HA", /* name */
2001 FALSE, /* partial_inplace */
2002 0, /* src_mask */
2003 0xffff, /* dst_mask */
2004 TRUE), /* pcrel_offset */
2005
2006 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2007 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2008 16, /* rightshift */
2009 1, /* size (0 = byte, 1 = short, 2 = long) */
2010 16, /* bitsize */
2011 FALSE, /* pc_relative */
2012 0, /* bitpos */
2013 complain_overflow_dont, /* complain_on_overflow */
2014 bfd_elf_generic_reloc, /* special_function */
2015 "R_PPC64_ADDR16_HIGH", /* name */
2016 FALSE, /* partial_inplace */
2017 0, /* src_mask */
2018 0xffff, /* dst_mask */
2019 FALSE), /* pcrel_offset */
2020
2021 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2022 HOWTO (R_PPC64_ADDR16_HIGHA, /* 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 ppc64_elf_ha_reloc, /* special_function */
2030 "R_PPC64_ADDR16_HIGHA", /* name */
2031 FALSE, /* partial_inplace */
2032 0, /* src_mask */
2033 0xffff, /* dst_mask */
2034 FALSE), /* pcrel_offset */
2035
2036 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2037 HOWTO (R_PPC64_DTPREL16_HIGH,
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_unhandled_reloc, /* special_function */
2045 "R_PPC64_DTPREL16_HIGH", /* name */
2046 FALSE, /* partial_inplace */
2047 0, /* src_mask */
2048 0xffff, /* dst_mask */
2049 FALSE), /* pcrel_offset */
2050
2051 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2052 HOWTO (R_PPC64_DTPREL16_HIGHA,
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_HIGHA", /* name */
2061 FALSE, /* partial_inplace */
2062 0, /* src_mask */
2063 0xffff, /* dst_mask */
2064 FALSE), /* pcrel_offset */
2065
2066 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2067 HOWTO (R_PPC64_TPREL16_HIGH,
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_TPREL16_HIGH", /* name */
2076 FALSE, /* partial_inplace */
2077 0, /* src_mask */
2078 0xffff, /* dst_mask */
2079 FALSE), /* pcrel_offset */
2080
2081 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2082 HOWTO (R_PPC64_TPREL16_HIGHA,
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_HIGHA", /* name */
2091 FALSE, /* partial_inplace */
2092 0, /* src_mask */
2093 0xffff, /* dst_mask */
2094 FALSE), /* pcrel_offset */
2095
2096 /* Like ADDR64, but use local entry point of function. */
2097 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2098 0, /* rightshift */
2099 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2100 64, /* bitsize */
2101 FALSE, /* pc_relative */
2102 0, /* bitpos */
2103 complain_overflow_dont, /* complain_on_overflow */
2104 bfd_elf_generic_reloc, /* special_function */
2105 "R_PPC64_ADDR64_LOCAL", /* name */
2106 FALSE, /* partial_inplace */
2107 0, /* src_mask */
2108 ONES (64), /* dst_mask */
2109 FALSE), /* pcrel_offset */
2110
2111 /* GNU extension to record C++ vtable hierarchy. */
2112 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2113 0, /* rightshift */
2114 0, /* size (0 = byte, 1 = short, 2 = long) */
2115 0, /* bitsize */
2116 FALSE, /* pc_relative */
2117 0, /* bitpos */
2118 complain_overflow_dont, /* complain_on_overflow */
2119 NULL, /* special_function */
2120 "R_PPC64_GNU_VTINHERIT", /* name */
2121 FALSE, /* partial_inplace */
2122 0, /* src_mask */
2123 0, /* dst_mask */
2124 FALSE), /* pcrel_offset */
2125
2126 /* GNU extension to record C++ vtable member usage. */
2127 HOWTO (R_PPC64_GNU_VTENTRY, /* 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_VTENTRY", /* name */
2136 FALSE, /* partial_inplace */
2137 0, /* src_mask */
2138 0, /* dst_mask */
2139 FALSE), /* pcrel_offset */
2140 };
2141
2142 \f
2143 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2144 be done. */
2145
2146 static void
2147 ppc_howto_init (void)
2148 {
2149 unsigned int i, type;
2150
2151 for (i = 0;
2152 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2153 i++)
2154 {
2155 type = ppc64_elf_howto_raw[i].type;
2156 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2157 / sizeof (ppc64_elf_howto_table[0])));
2158 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2159 }
2160 }
2161
2162 static reloc_howto_type *
2163 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2164 bfd_reloc_code_real_type code)
2165 {
2166 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2167
2168 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2169 /* Initialize howto table if needed. */
2170 ppc_howto_init ();
2171
2172 switch (code)
2173 {
2174 default:
2175 return NULL;
2176
2177 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2178 break;
2179 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2180 break;
2181 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2182 break;
2183 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2184 break;
2185 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2186 break;
2187 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2188 break;
2189 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2190 break;
2191 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2192 break;
2193 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2194 break;
2195 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2196 break;
2197 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2198 break;
2199 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2200 break;
2201 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2202 break;
2203 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2204 break;
2205 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2206 break;
2207 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2208 break;
2209 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2210 break;
2211 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2212 break;
2213 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2214 break;
2215 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2216 break;
2217 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2218 break;
2219 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2220 break;
2221 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2222 break;
2223 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2224 break;
2225 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2226 break;
2227 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2228 break;
2229 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2230 break;
2231 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2232 break;
2233 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2234 break;
2235 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2236 break;
2237 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2238 break;
2239 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2240 break;
2241 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2242 break;
2243 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2244 break;
2245 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2246 break;
2247 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2248 break;
2249 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2250 break;
2251 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2252 break;
2253 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2254 break;
2255 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2256 break;
2257 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2258 break;
2259 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2260 break;
2261 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2262 break;
2263 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2264 break;
2265 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2266 break;
2267 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2268 break;
2269 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2270 break;
2271 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2272 break;
2273 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2274 break;
2275 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2276 break;
2277 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2278 break;
2279 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2280 break;
2281 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2282 break;
2283 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2284 break;
2285 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2286 break;
2287 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2288 break;
2289 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2290 break;
2291 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2292 break;
2293 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2294 break;
2295 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2296 break;
2297 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2298 break;
2299 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2300 break;
2301 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2302 break;
2303 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2304 break;
2305 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2306 break;
2307 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2308 break;
2309 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2310 break;
2311 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2312 break;
2313 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2314 break;
2315 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2316 break;
2317 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2318 break;
2319 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2320 break;
2321 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2322 break;
2323 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2324 break;
2325 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2326 break;
2327 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2328 break;
2329 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2330 break;
2331 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2332 break;
2333 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2334 break;
2335 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2336 break;
2337 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2338 break;
2339 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2340 break;
2341 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2342 break;
2343 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2344 break;
2345 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2346 break;
2347 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2348 break;
2349 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2350 break;
2351 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2352 break;
2353 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2356 break;
2357 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2358 break;
2359 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2360 break;
2361 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2362 break;
2363 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2364 break;
2365 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2368 break;
2369 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2370 break;
2371 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2372 break;
2373 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2374 break;
2375 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2376 break;
2377 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2378 break;
2379 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2382 break;
2383 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2384 break;
2385 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2386 break;
2387 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2388 break;
2389 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2390 break;
2391 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2392 break;
2393 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2394 break;
2395 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2396 break;
2397 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2398 break;
2399 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2400 break;
2401 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2402 break;
2403 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2404 break;
2405 }
2406
2407 return ppc64_elf_howto_table[r];
2408 };
2409
2410 static reloc_howto_type *
2411 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2412 const char *r_name)
2413 {
2414 unsigned int i;
2415
2416 for (i = 0;
2417 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2418 i++)
2419 if (ppc64_elf_howto_raw[i].name != NULL
2420 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2421 return &ppc64_elf_howto_raw[i];
2422
2423 return NULL;
2424 }
2425
2426 /* Set the howto pointer for a PowerPC ELF reloc. */
2427
2428 static void
2429 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2430 Elf_Internal_Rela *dst)
2431 {
2432 unsigned int type;
2433
2434 /* Initialize howto table if needed. */
2435 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2436 ppc_howto_init ();
2437
2438 type = ELF64_R_TYPE (dst->r_info);
2439 if (type >= (sizeof (ppc64_elf_howto_table)
2440 / sizeof (ppc64_elf_howto_table[0])))
2441 {
2442 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2443 abfd, (int) type);
2444 type = R_PPC64_NONE;
2445 }
2446 cache_ptr->howto = ppc64_elf_howto_table[type];
2447 }
2448
2449 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2450
2451 static bfd_reloc_status_type
2452 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2453 void *data, asection *input_section,
2454 bfd *output_bfd, char **error_message)
2455 {
2456 /* If this is a relocatable link (output_bfd test tells us), just
2457 call the generic function. Any adjustment will be done at final
2458 link time. */
2459 if (output_bfd != NULL)
2460 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2461 input_section, output_bfd, error_message);
2462
2463 /* Adjust the addend for sign extension of the low 16 bits.
2464 We won't actually be using the low 16 bits, so trashing them
2465 doesn't matter. */
2466 reloc_entry->addend += 0x8000;
2467 return bfd_reloc_continue;
2468 }
2469
2470 static bfd_reloc_status_type
2471 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2472 void *data, asection *input_section,
2473 bfd *output_bfd, char **error_message)
2474 {
2475 if (output_bfd != NULL)
2476 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2477 input_section, output_bfd, error_message);
2478
2479 if (strcmp (symbol->section->name, ".opd") == 0
2480 && (symbol->section->owner->flags & DYNAMIC) == 0)
2481 {
2482 bfd_vma dest = opd_entry_value (symbol->section,
2483 symbol->value + reloc_entry->addend,
2484 NULL, NULL, FALSE);
2485 if (dest != (bfd_vma) -1)
2486 reloc_entry->addend = dest - (symbol->value
2487 + symbol->section->output_section->vma
2488 + symbol->section->output_offset);
2489 }
2490 return bfd_reloc_continue;
2491 }
2492
2493 static bfd_reloc_status_type
2494 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2495 void *data, asection *input_section,
2496 bfd *output_bfd, char **error_message)
2497 {
2498 long insn;
2499 enum elf_ppc64_reloc_type r_type;
2500 bfd_size_type octets;
2501 /* Assume 'at' branch hints. */
2502 bfd_boolean is_isa_v2 = TRUE;
2503
2504 /* If this is a relocatable link (output_bfd test tells us), just
2505 call the generic function. Any adjustment will be done at final
2506 link time. */
2507 if (output_bfd != NULL)
2508 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2509 input_section, output_bfd, error_message);
2510
2511 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2512 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2513 insn &= ~(0x01 << 21);
2514 r_type = reloc_entry->howto->type;
2515 if (r_type == R_PPC64_ADDR14_BRTAKEN
2516 || r_type == R_PPC64_REL14_BRTAKEN)
2517 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2518
2519 if (is_isa_v2)
2520 {
2521 /* Set 'a' bit. This is 0b00010 in BO field for branch
2522 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2523 for branch on CTR insns (BO == 1a00t or 1a01t). */
2524 if ((insn & (0x14 << 21)) == (0x04 << 21))
2525 insn |= 0x02 << 21;
2526 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2527 insn |= 0x08 << 21;
2528 else
2529 goto out;
2530 }
2531 else
2532 {
2533 bfd_vma target = 0;
2534 bfd_vma from;
2535
2536 if (!bfd_is_com_section (symbol->section))
2537 target = symbol->value;
2538 target += symbol->section->output_section->vma;
2539 target += symbol->section->output_offset;
2540 target += reloc_entry->addend;
2541
2542 from = (reloc_entry->address
2543 + input_section->output_offset
2544 + input_section->output_section->vma);
2545
2546 /* Invert 'y' bit if not the default. */
2547 if ((bfd_signed_vma) (target - from) < 0)
2548 insn ^= 0x01 << 21;
2549 }
2550 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2551 out:
2552 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2553 input_section, output_bfd, error_message);
2554 }
2555
2556 static bfd_reloc_status_type
2557 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2558 void *data, asection *input_section,
2559 bfd *output_bfd, char **error_message)
2560 {
2561 /* If this is a relocatable link (output_bfd test tells us), just
2562 call the generic function. Any adjustment will be done at final
2563 link time. */
2564 if (output_bfd != NULL)
2565 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2566 input_section, output_bfd, error_message);
2567
2568 /* Subtract the symbol section base address. */
2569 reloc_entry->addend -= symbol->section->output_section->vma;
2570 return bfd_reloc_continue;
2571 }
2572
2573 static bfd_reloc_status_type
2574 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2575 void *data, asection *input_section,
2576 bfd *output_bfd, char **error_message)
2577 {
2578 /* If this is a relocatable link (output_bfd test tells us), just
2579 call the generic function. Any adjustment will be done at final
2580 link time. */
2581 if (output_bfd != NULL)
2582 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2583 input_section, output_bfd, error_message);
2584
2585 /* Subtract the symbol section base address. */
2586 reloc_entry->addend -= symbol->section->output_section->vma;
2587
2588 /* Adjust the addend for sign extension of the low 16 bits. */
2589 reloc_entry->addend += 0x8000;
2590 return bfd_reloc_continue;
2591 }
2592
2593 static bfd_reloc_status_type
2594 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2595 void *data, asection *input_section,
2596 bfd *output_bfd, char **error_message)
2597 {
2598 bfd_vma TOCstart;
2599
2600 /* If this is a relocatable link (output_bfd test tells us), just
2601 call the generic function. Any adjustment will be done at final
2602 link time. */
2603 if (output_bfd != NULL)
2604 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2605 input_section, output_bfd, error_message);
2606
2607 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2608 if (TOCstart == 0)
2609 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2610
2611 /* Subtract the TOC base address. */
2612 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2613 return bfd_reloc_continue;
2614 }
2615
2616 static bfd_reloc_status_type
2617 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2618 void *data, asection *input_section,
2619 bfd *output_bfd, char **error_message)
2620 {
2621 bfd_vma TOCstart;
2622
2623 /* If this is a relocatable link (output_bfd test tells us), just
2624 call the generic function. Any adjustment will be done at final
2625 link time. */
2626 if (output_bfd != NULL)
2627 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2628 input_section, output_bfd, error_message);
2629
2630 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2631 if (TOCstart == 0)
2632 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2633
2634 /* Subtract the TOC base address. */
2635 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2636
2637 /* Adjust the addend for sign extension of the low 16 bits. */
2638 reloc_entry->addend += 0x8000;
2639 return bfd_reloc_continue;
2640 }
2641
2642 static bfd_reloc_status_type
2643 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2644 void *data, asection *input_section,
2645 bfd *output_bfd, char **error_message)
2646 {
2647 bfd_vma TOCstart;
2648 bfd_size_type octets;
2649
2650 /* If this is a relocatable link (output_bfd test tells us), just
2651 call the generic function. Any adjustment will be done at final
2652 link time. */
2653 if (output_bfd != NULL)
2654 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2655 input_section, output_bfd, error_message);
2656
2657 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2658 if (TOCstart == 0)
2659 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2660
2661 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2662 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2663 return bfd_reloc_ok;
2664 }
2665
2666 static bfd_reloc_status_type
2667 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2668 void *data, asection *input_section,
2669 bfd *output_bfd, char **error_message)
2670 {
2671 /* If this is a relocatable link (output_bfd test tells us), just
2672 call the generic function. Any adjustment will be done at final
2673 link time. */
2674 if (output_bfd != NULL)
2675 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2676 input_section, output_bfd, error_message);
2677
2678 if (error_message != NULL)
2679 {
2680 static char buf[60];
2681 sprintf (buf, "generic linker can't handle %s",
2682 reloc_entry->howto->name);
2683 *error_message = buf;
2684 }
2685 return bfd_reloc_dangerous;
2686 }
2687
2688 /* Track GOT entries needed for a given symbol. We might need more
2689 than one got entry per symbol. */
2690 struct got_entry
2691 {
2692 struct got_entry *next;
2693
2694 /* The symbol addend that we'll be placing in the GOT. */
2695 bfd_vma addend;
2696
2697 /* Unlike other ELF targets, we use separate GOT entries for the same
2698 symbol referenced from different input files. This is to support
2699 automatic multiple TOC/GOT sections, where the TOC base can vary
2700 from one input file to another. After partitioning into TOC groups
2701 we merge entries within the group.
2702
2703 Point to the BFD owning this GOT entry. */
2704 bfd *owner;
2705
2706 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2707 TLS_TPREL or TLS_DTPREL for tls entries. */
2708 unsigned char tls_type;
2709
2710 /* Non-zero if got.ent points to real entry. */
2711 unsigned char is_indirect;
2712
2713 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2714 union
2715 {
2716 bfd_signed_vma refcount;
2717 bfd_vma offset;
2718 struct got_entry *ent;
2719 } got;
2720 };
2721
2722 /* The same for PLT. */
2723 struct plt_entry
2724 {
2725 struct plt_entry *next;
2726
2727 bfd_vma addend;
2728
2729 union
2730 {
2731 bfd_signed_vma refcount;
2732 bfd_vma offset;
2733 } plt;
2734 };
2735
2736 struct ppc64_elf_obj_tdata
2737 {
2738 struct elf_obj_tdata elf;
2739
2740 /* Shortcuts to dynamic linker sections. */
2741 asection *got;
2742 asection *relgot;
2743
2744 /* Used during garbage collection. We attach global symbols defined
2745 on removed .opd entries to this section so that the sym is removed. */
2746 asection *deleted_section;
2747
2748 /* TLS local dynamic got entry handling. Support for multiple GOT
2749 sections means we potentially need one of these for each input bfd. */
2750 struct got_entry tlsld_got;
2751
2752 union {
2753 /* A copy of relocs before they are modified for --emit-relocs. */
2754 Elf_Internal_Rela *relocs;
2755
2756 /* Section contents. */
2757 bfd_byte *contents;
2758 } opd;
2759
2760 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2761 the reloc to be in the range -32768 to 32767. */
2762 unsigned int has_small_toc_reloc : 1;
2763
2764 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2765 instruction not one we handle. */
2766 unsigned int unexpected_toc_insn : 1;
2767 };
2768
2769 #define ppc64_elf_tdata(bfd) \
2770 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2771
2772 #define ppc64_tlsld_got(bfd) \
2773 (&ppc64_elf_tdata (bfd)->tlsld_got)
2774
2775 #define is_ppc64_elf(bfd) \
2776 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2777 && elf_object_id (bfd) == PPC64_ELF_DATA)
2778
2779 /* Override the generic function because we store some extras. */
2780
2781 static bfd_boolean
2782 ppc64_elf_mkobject (bfd *abfd)
2783 {
2784 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2785 PPC64_ELF_DATA);
2786 }
2787
2788 /* Fix bad default arch selected for a 64 bit input bfd when the
2789 default is 32 bit. */
2790
2791 static bfd_boolean
2792 ppc64_elf_object_p (bfd *abfd)
2793 {
2794 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2795 {
2796 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2797
2798 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2799 {
2800 /* Relies on arch after 32 bit default being 64 bit default. */
2801 abfd->arch_info = abfd->arch_info->next;
2802 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2803 }
2804 }
2805 return TRUE;
2806 }
2807
2808 /* Support for core dump NOTE sections. */
2809
2810 static bfd_boolean
2811 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2812 {
2813 size_t offset, size;
2814
2815 if (note->descsz != 504)
2816 return FALSE;
2817
2818 /* pr_cursig */
2819 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2820
2821 /* pr_pid */
2822 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2823
2824 /* pr_reg */
2825 offset = 112;
2826 size = 384;
2827
2828 /* Make a ".reg/999" section. */
2829 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2830 size, note->descpos + offset);
2831 }
2832
2833 static bfd_boolean
2834 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2835 {
2836 if (note->descsz != 136)
2837 return FALSE;
2838
2839 elf_tdata (abfd)->core->pid
2840 = bfd_get_32 (abfd, note->descdata + 24);
2841 elf_tdata (abfd)->core->program
2842 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2843 elf_tdata (abfd)->core->command
2844 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2845
2846 return TRUE;
2847 }
2848
2849 static char *
2850 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2851 ...)
2852 {
2853 switch (note_type)
2854 {
2855 default:
2856 return NULL;
2857
2858 case NT_PRPSINFO:
2859 {
2860 char data[136];
2861 va_list ap;
2862
2863 va_start (ap, note_type);
2864 memset (data, 0, sizeof (data));
2865 strncpy (data + 40, va_arg (ap, const char *), 16);
2866 strncpy (data + 56, va_arg (ap, const char *), 80);
2867 va_end (ap);
2868 return elfcore_write_note (abfd, buf, bufsiz,
2869 "CORE", note_type, data, sizeof (data));
2870 }
2871
2872 case NT_PRSTATUS:
2873 {
2874 char data[504];
2875 va_list ap;
2876 long pid;
2877 int cursig;
2878 const void *greg;
2879
2880 va_start (ap, note_type);
2881 memset (data, 0, 112);
2882 pid = va_arg (ap, long);
2883 bfd_put_32 (abfd, pid, data + 32);
2884 cursig = va_arg (ap, int);
2885 bfd_put_16 (abfd, cursig, data + 12);
2886 greg = va_arg (ap, const void *);
2887 memcpy (data + 112, greg, 384);
2888 memset (data + 496, 0, 8);
2889 va_end (ap);
2890 return elfcore_write_note (abfd, buf, bufsiz,
2891 "CORE", note_type, data, sizeof (data));
2892 }
2893 }
2894 }
2895
2896 /* Add extra PPC sections. */
2897
2898 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2899 {
2900 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2901 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2902 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2903 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2904 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2905 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2906 { NULL, 0, 0, 0, 0 }
2907 };
2908
2909 enum _ppc64_sec_type {
2910 sec_normal = 0,
2911 sec_opd = 1,
2912 sec_toc = 2
2913 };
2914
2915 struct _ppc64_elf_section_data
2916 {
2917 struct bfd_elf_section_data elf;
2918
2919 union
2920 {
2921 /* An array with one entry for each opd function descriptor. */
2922 struct _opd_sec_data
2923 {
2924 /* Points to the function code section for local opd entries. */
2925 asection **func_sec;
2926
2927 /* After editing .opd, adjust references to opd local syms. */
2928 long *adjust;
2929 } opd;
2930
2931 /* An array for toc sections, indexed by offset/8. */
2932 struct _toc_sec_data
2933 {
2934 /* Specifies the relocation symbol index used at a given toc offset. */
2935 unsigned *symndx;
2936
2937 /* And the relocation addend. */
2938 bfd_vma *add;
2939 } toc;
2940 } u;
2941
2942 enum _ppc64_sec_type sec_type:2;
2943
2944 /* Flag set when small branches are detected. Used to
2945 select suitable defaults for the stub group size. */
2946 unsigned int has_14bit_branch:1;
2947 };
2948
2949 #define ppc64_elf_section_data(sec) \
2950 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2951
2952 static bfd_boolean
2953 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2954 {
2955 if (!sec->used_by_bfd)
2956 {
2957 struct _ppc64_elf_section_data *sdata;
2958 bfd_size_type amt = sizeof (*sdata);
2959
2960 sdata = bfd_zalloc (abfd, amt);
2961 if (sdata == NULL)
2962 return FALSE;
2963 sec->used_by_bfd = sdata;
2964 }
2965
2966 return _bfd_elf_new_section_hook (abfd, sec);
2967 }
2968
2969 static struct _opd_sec_data *
2970 get_opd_info (asection * sec)
2971 {
2972 if (sec != NULL
2973 && ppc64_elf_section_data (sec) != NULL
2974 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2975 return &ppc64_elf_section_data (sec)->u.opd;
2976 return NULL;
2977 }
2978
2979 static inline int
2980 abiversion (bfd *abfd)
2981 {
2982 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
2983 }
2984
2985 static inline void
2986 set_abiversion (bfd *abfd, int ver)
2987 {
2988 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
2989 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
2990 }
2991 \f
2992 /* Parameters for the qsort hook. */
2993 static bfd_boolean synthetic_relocatable;
2994
2995 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2996
2997 static int
2998 compare_symbols (const void *ap, const void *bp)
2999 {
3000 const asymbol *a = * (const asymbol **) ap;
3001 const asymbol *b = * (const asymbol **) bp;
3002
3003 /* Section symbols first. */
3004 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3005 return -1;
3006 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3007 return 1;
3008
3009 /* then .opd symbols. */
3010 if (strcmp (a->section->name, ".opd") == 0
3011 && strcmp (b->section->name, ".opd") != 0)
3012 return -1;
3013 if (strcmp (a->section->name, ".opd") != 0
3014 && strcmp (b->section->name, ".opd") == 0)
3015 return 1;
3016
3017 /* then other code symbols. */
3018 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3019 == (SEC_CODE | SEC_ALLOC)
3020 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3021 != (SEC_CODE | SEC_ALLOC))
3022 return -1;
3023
3024 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3025 != (SEC_CODE | SEC_ALLOC)
3026 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3027 == (SEC_CODE | SEC_ALLOC))
3028 return 1;
3029
3030 if (synthetic_relocatable)
3031 {
3032 if (a->section->id < b->section->id)
3033 return -1;
3034
3035 if (a->section->id > b->section->id)
3036 return 1;
3037 }
3038
3039 if (a->value + a->section->vma < b->value + b->section->vma)
3040 return -1;
3041
3042 if (a->value + a->section->vma > b->value + b->section->vma)
3043 return 1;
3044
3045 /* For syms with the same value, prefer strong dynamic global function
3046 syms over other syms. */
3047 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3048 return -1;
3049
3050 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3051 return 1;
3052
3053 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3054 return -1;
3055
3056 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3057 return 1;
3058
3059 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3060 return -1;
3061
3062 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3063 return 1;
3064
3065 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3066 return -1;
3067
3068 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3069 return 1;
3070
3071 return 0;
3072 }
3073
3074 /* Search SYMS for a symbol of the given VALUE. */
3075
3076 static asymbol *
3077 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
3078 {
3079 long mid;
3080
3081 if (id == -1)
3082 {
3083 while (lo < hi)
3084 {
3085 mid = (lo + hi) >> 1;
3086 if (syms[mid]->value + syms[mid]->section->vma < value)
3087 lo = mid + 1;
3088 else if (syms[mid]->value + syms[mid]->section->vma > value)
3089 hi = mid;
3090 else
3091 return syms[mid];
3092 }
3093 }
3094 else
3095 {
3096 while (lo < hi)
3097 {
3098 mid = (lo + hi) >> 1;
3099 if (syms[mid]->section->id < id)
3100 lo = mid + 1;
3101 else if (syms[mid]->section->id > id)
3102 hi = mid;
3103 else if (syms[mid]->value < value)
3104 lo = mid + 1;
3105 else if (syms[mid]->value > value)
3106 hi = mid;
3107 else
3108 return syms[mid];
3109 }
3110 }
3111 return NULL;
3112 }
3113
3114 static bfd_boolean
3115 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3116 {
3117 bfd_vma vma = *(bfd_vma *) ptr;
3118 return ((section->flags & SEC_ALLOC) != 0
3119 && section->vma <= vma
3120 && vma < section->vma + section->size);
3121 }
3122
3123 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3124 entry syms. Also generate @plt symbols for the glink branch table. */
3125
3126 static long
3127 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3128 long static_count, asymbol **static_syms,
3129 long dyn_count, asymbol **dyn_syms,
3130 asymbol **ret)
3131 {
3132 asymbol *s;
3133 long i;
3134 long count;
3135 char *names;
3136 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3137 asection *opd = NULL;
3138 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3139 asymbol **syms;
3140 int abi = abiversion (abfd);
3141
3142 *ret = NULL;
3143
3144 if (abi < 2)
3145 {
3146 opd = bfd_get_section_by_name (abfd, ".opd");
3147 if (opd == NULL && abi == 1)
3148 return 0;
3149 }
3150
3151 symcount = static_count;
3152 if (!relocatable)
3153 symcount += dyn_count;
3154 if (symcount == 0)
3155 return 0;
3156
3157 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3158 if (syms == NULL)
3159 return -1;
3160
3161 if (!relocatable && static_count != 0 && dyn_count != 0)
3162 {
3163 /* Use both symbol tables. */
3164 memcpy (syms, static_syms, static_count * sizeof (*syms));
3165 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3166 }
3167 else if (!relocatable && static_count == 0)
3168 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3169 else
3170 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3171
3172 synthetic_relocatable = relocatable;
3173 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3174
3175 if (!relocatable && symcount > 1)
3176 {
3177 long j;
3178 /* Trim duplicate syms, since we may have merged the normal and
3179 dynamic symbols. Actually, we only care about syms that have
3180 different values, so trim any with the same value. */
3181 for (i = 1, j = 1; i < symcount; ++i)
3182 if (syms[i - 1]->value + syms[i - 1]->section->vma
3183 != syms[i]->value + syms[i]->section->vma)
3184 syms[j++] = syms[i];
3185 symcount = j;
3186 }
3187
3188 i = 0;
3189 if (strcmp (syms[i]->section->name, ".opd") == 0)
3190 ++i;
3191 codesecsym = i;
3192
3193 for (; i < symcount; ++i)
3194 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3195 != (SEC_CODE | SEC_ALLOC))
3196 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3197 break;
3198 codesecsymend = i;
3199
3200 for (; i < symcount; ++i)
3201 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3202 break;
3203 secsymend = i;
3204
3205 for (; i < symcount; ++i)
3206 if (strcmp (syms[i]->section->name, ".opd") != 0)
3207 break;
3208 opdsymend = i;
3209
3210 for (; i < symcount; ++i)
3211 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3212 != (SEC_CODE | SEC_ALLOC))
3213 break;
3214 symcount = i;
3215
3216 count = 0;
3217
3218 if (relocatable)
3219 {
3220 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3221 arelent *r;
3222 size_t size;
3223 long relcount;
3224
3225 if (opdsymend == secsymend)
3226 goto done;
3227
3228 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3229 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3230 if (relcount == 0)
3231 goto done;
3232
3233 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3234 {
3235 count = -1;
3236 goto done;
3237 }
3238
3239 size = 0;
3240 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3241 {
3242 asymbol *sym;
3243
3244 while (r < opd->relocation + relcount
3245 && r->address < syms[i]->value + opd->vma)
3246 ++r;
3247
3248 if (r == opd->relocation + relcount)
3249 break;
3250
3251 if (r->address != syms[i]->value + opd->vma)
3252 continue;
3253
3254 if (r->howto->type != R_PPC64_ADDR64)
3255 continue;
3256
3257 sym = *r->sym_ptr_ptr;
3258 if (!sym_exists_at (syms, opdsymend, symcount,
3259 sym->section->id, sym->value + r->addend))
3260 {
3261 ++count;
3262 size += sizeof (asymbol);
3263 size += strlen (syms[i]->name) + 2;
3264 }
3265 }
3266
3267 s = *ret = bfd_malloc (size);
3268 if (s == NULL)
3269 {
3270 count = -1;
3271 goto done;
3272 }
3273
3274 names = (char *) (s + count);
3275
3276 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3277 {
3278 asymbol *sym;
3279
3280 while (r < opd->relocation + relcount
3281 && r->address < syms[i]->value + opd->vma)
3282 ++r;
3283
3284 if (r == opd->relocation + relcount)
3285 break;
3286
3287 if (r->address != syms[i]->value + opd->vma)
3288 continue;
3289
3290 if (r->howto->type != R_PPC64_ADDR64)
3291 continue;
3292
3293 sym = *r->sym_ptr_ptr;
3294 if (!sym_exists_at (syms, opdsymend, symcount,
3295 sym->section->id, sym->value + r->addend))
3296 {
3297 size_t len;
3298
3299 *s = *syms[i];
3300 s->flags |= BSF_SYNTHETIC;
3301 s->section = sym->section;
3302 s->value = sym->value + r->addend;
3303 s->name = names;
3304 *names++ = '.';
3305 len = strlen (syms[i]->name);
3306 memcpy (names, syms[i]->name, len + 1);
3307 names += len + 1;
3308 /* Have udata.p point back to the original symbol this
3309 synthetic symbol was derived from. */
3310 s->udata.p = syms[i];
3311 s++;
3312 }
3313 }
3314 }
3315 else
3316 {
3317 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3318 bfd_byte *contents = NULL;
3319 size_t size;
3320 long plt_count = 0;
3321 bfd_vma glink_vma = 0, resolv_vma = 0;
3322 asection *dynamic, *glink = NULL, *relplt = NULL;
3323 arelent *p;
3324
3325 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3326 {
3327 free_contents_and_exit:
3328 if (contents)
3329 free (contents);
3330 count = -1;
3331 goto done;
3332 }
3333
3334 size = 0;
3335 for (i = secsymend; i < opdsymend; ++i)
3336 {
3337 bfd_vma ent;
3338
3339 /* Ignore bogus symbols. */
3340 if (syms[i]->value > opd->size - 8)
3341 continue;
3342
3343 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3344 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3345 {
3346 ++count;
3347 size += sizeof (asymbol);
3348 size += strlen (syms[i]->name) + 2;
3349 }
3350 }
3351
3352 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3353 if (dyn_count != 0
3354 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3355 {
3356 bfd_byte *dynbuf, *extdyn, *extdynend;
3357 size_t extdynsize;
3358 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3359
3360 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3361 goto free_contents_and_exit;
3362
3363 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3364 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3365
3366 extdyn = dynbuf;
3367 extdynend = extdyn + dynamic->size;
3368 for (; extdyn < extdynend; extdyn += extdynsize)
3369 {
3370 Elf_Internal_Dyn dyn;
3371 (*swap_dyn_in) (abfd, extdyn, &dyn);
3372
3373 if (dyn.d_tag == DT_NULL)
3374 break;
3375
3376 if (dyn.d_tag == DT_PPC64_GLINK)
3377 {
3378 /* The first glink stub starts at offset 32; see
3379 comment in ppc64_elf_finish_dynamic_sections. */
3380 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3381 /* The .glink section usually does not survive the final
3382 link; search for the section (usually .text) where the
3383 glink stubs now reside. */
3384 glink = bfd_sections_find_if (abfd, section_covers_vma,
3385 &glink_vma);
3386 break;
3387 }
3388 }
3389
3390 free (dynbuf);
3391 }
3392
3393 if (glink != NULL)
3394 {
3395 /* Determine __glink trampoline by reading the relative branch
3396 from the first glink stub. */
3397 bfd_byte buf[4];
3398 unsigned int off = 0;
3399
3400 while (bfd_get_section_contents (abfd, glink, buf,
3401 glink_vma + off - glink->vma, 4))
3402 {
3403 unsigned int insn = bfd_get_32 (abfd, buf);
3404 insn ^= B_DOT;
3405 if ((insn & ~0x3fffffc) == 0)
3406 {
3407 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3408 break;
3409 }
3410 off += 4;
3411 if (off > 4)
3412 break;
3413 }
3414
3415 if (resolv_vma)
3416 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3417
3418 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3419 if (relplt != NULL)
3420 {
3421 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3422 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3423 goto free_contents_and_exit;
3424
3425 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3426 size += plt_count * sizeof (asymbol);
3427
3428 p = relplt->relocation;
3429 for (i = 0; i < plt_count; i++, p++)
3430 {
3431 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3432 if (p->addend != 0)
3433 size += sizeof ("+0x") - 1 + 16;
3434 }
3435 }
3436 }
3437
3438 s = *ret = bfd_malloc (size);
3439 if (s == NULL)
3440 goto free_contents_and_exit;
3441
3442 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3443
3444 for (i = secsymend; i < opdsymend; ++i)
3445 {
3446 bfd_vma ent;
3447
3448 if (syms[i]->value > opd->size - 8)
3449 continue;
3450
3451 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3452 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3453 {
3454 long lo, hi;
3455 size_t len;
3456 asection *sec = abfd->sections;
3457
3458 *s = *syms[i];
3459 lo = codesecsym;
3460 hi = codesecsymend;
3461 while (lo < hi)
3462 {
3463 long mid = (lo + hi) >> 1;
3464 if (syms[mid]->section->vma < ent)
3465 lo = mid + 1;
3466 else if (syms[mid]->section->vma > ent)
3467 hi = mid;
3468 else
3469 {
3470 sec = syms[mid]->section;
3471 break;
3472 }
3473 }
3474
3475 if (lo >= hi && lo > codesecsym)
3476 sec = syms[lo - 1]->section;
3477
3478 for (; sec != NULL; sec = sec->next)
3479 {
3480 if (sec->vma > ent)
3481 break;
3482 /* SEC_LOAD may not be set if SEC is from a separate debug
3483 info file. */
3484 if ((sec->flags & SEC_ALLOC) == 0)
3485 break;
3486 if ((sec->flags & SEC_CODE) != 0)
3487 s->section = sec;
3488 }
3489 s->flags |= BSF_SYNTHETIC;
3490 s->value = ent - s->section->vma;
3491 s->name = names;
3492 *names++ = '.';
3493 len = strlen (syms[i]->name);
3494 memcpy (names, syms[i]->name, len + 1);
3495 names += len + 1;
3496 /* Have udata.p point back to the original symbol this
3497 synthetic symbol was derived from. */
3498 s->udata.p = syms[i];
3499 s++;
3500 }
3501 }
3502 free (contents);
3503
3504 if (glink != NULL && relplt != NULL)
3505 {
3506 if (resolv_vma)
3507 {
3508 /* Add a symbol for the main glink trampoline. */
3509 memset (s, 0, sizeof *s);
3510 s->the_bfd = abfd;
3511 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3512 s->section = glink;
3513 s->value = resolv_vma - glink->vma;
3514 s->name = names;
3515 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3516 names += sizeof ("__glink_PLTresolve");
3517 s++;
3518 count++;
3519 }
3520
3521 /* FIXME: It would be very much nicer to put sym@plt on the
3522 stub rather than on the glink branch table entry. The
3523 objdump disassembler would then use a sensible symbol
3524 name on plt calls. The difficulty in doing so is
3525 a) finding the stubs, and,
3526 b) matching stubs against plt entries, and,
3527 c) there can be multiple stubs for a given plt entry.
3528
3529 Solving (a) could be done by code scanning, but older
3530 ppc64 binaries used different stubs to current code.
3531 (b) is the tricky one since you need to known the toc
3532 pointer for at least one function that uses a pic stub to
3533 be able to calculate the plt address referenced.
3534 (c) means gdb would need to set multiple breakpoints (or
3535 find the glink branch itself) when setting breakpoints
3536 for pending shared library loads. */
3537 p = relplt->relocation;
3538 for (i = 0; i < plt_count; i++, p++)
3539 {
3540 size_t len;
3541
3542 *s = **p->sym_ptr_ptr;
3543 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3544 we are defining a symbol, ensure one of them is set. */
3545 if ((s->flags & BSF_LOCAL) == 0)
3546 s->flags |= BSF_GLOBAL;
3547 s->flags |= BSF_SYNTHETIC;
3548 s->section = glink;
3549 s->value = glink_vma - glink->vma;
3550 s->name = names;
3551 s->udata.p = NULL;
3552 len = strlen ((*p->sym_ptr_ptr)->name);
3553 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3554 names += len;
3555 if (p->addend != 0)
3556 {
3557 memcpy (names, "+0x", sizeof ("+0x") - 1);
3558 names += sizeof ("+0x") - 1;
3559 bfd_sprintf_vma (abfd, names, p->addend);
3560 names += strlen (names);
3561 }
3562 memcpy (names, "@plt", sizeof ("@plt"));
3563 names += sizeof ("@plt");
3564 s++;
3565 if (abi < 2)
3566 {
3567 glink_vma += 8;
3568 if (i >= 0x8000)
3569 glink_vma += 4;
3570 }
3571 else
3572 glink_vma += 4;
3573 }
3574 count += plt_count;
3575 }
3576 }
3577
3578 done:
3579 free (syms);
3580 return count;
3581 }
3582 \f
3583 /* The following functions are specific to the ELF linker, while
3584 functions above are used generally. Those named ppc64_elf_* are
3585 called by the main ELF linker code. They appear in this file more
3586 or less in the order in which they are called. eg.
3587 ppc64_elf_check_relocs is called early in the link process,
3588 ppc64_elf_finish_dynamic_sections is one of the last functions
3589 called.
3590
3591 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3592 functions have both a function code symbol and a function descriptor
3593 symbol. A call to foo in a relocatable object file looks like:
3594
3595 . .text
3596 . x:
3597 . bl .foo
3598 . nop
3599
3600 The function definition in another object file might be:
3601
3602 . .section .opd
3603 . foo: .quad .foo
3604 . .quad .TOC.@tocbase
3605 . .quad 0
3606 .
3607 . .text
3608 . .foo: blr
3609
3610 When the linker resolves the call during a static link, the branch
3611 unsurprisingly just goes to .foo and the .opd information is unused.
3612 If the function definition is in a shared library, things are a little
3613 different: The call goes via a plt call stub, the opd information gets
3614 copied to the plt, and the linker patches the nop.
3615
3616 . x:
3617 . bl .foo_stub
3618 . ld 2,40(1)
3619 .
3620 .
3621 . .foo_stub:
3622 . std 2,40(1) # in practice, the call stub
3623 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3624 . addi 11,11,Lfoo@toc@l # this is the general idea
3625 . ld 12,0(11)
3626 . ld 2,8(11)
3627 . mtctr 12
3628 . ld 11,16(11)
3629 . bctr
3630 .
3631 . .section .plt
3632 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3633
3634 The "reloc ()" notation is supposed to indicate that the linker emits
3635 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3636 copying.
3637
3638 What are the difficulties here? Well, firstly, the relocations
3639 examined by the linker in check_relocs are against the function code
3640 sym .foo, while the dynamic relocation in the plt is emitted against
3641 the function descriptor symbol, foo. Somewhere along the line, we need
3642 to carefully copy dynamic link information from one symbol to the other.
3643 Secondly, the generic part of the elf linker will make .foo a dynamic
3644 symbol as is normal for most other backends. We need foo dynamic
3645 instead, at least for an application final link. However, when
3646 creating a shared library containing foo, we need to have both symbols
3647 dynamic so that references to .foo are satisfied during the early
3648 stages of linking. Otherwise the linker might decide to pull in a
3649 definition from some other object, eg. a static library.
3650
3651 Update: As of August 2004, we support a new convention. Function
3652 calls may use the function descriptor symbol, ie. "bl foo". This
3653 behaves exactly as "bl .foo". */
3654
3655 /* Of those relocs that might be copied as dynamic relocs, this function
3656 selects those that must be copied when linking a shared library,
3657 even when the symbol is local. */
3658
3659 static int
3660 must_be_dyn_reloc (struct bfd_link_info *info,
3661 enum elf_ppc64_reloc_type r_type)
3662 {
3663 switch (r_type)
3664 {
3665 default:
3666 return 1;
3667
3668 case R_PPC64_REL32:
3669 case R_PPC64_REL64:
3670 case R_PPC64_REL30:
3671 return 0;
3672
3673 case R_PPC64_TPREL16:
3674 case R_PPC64_TPREL16_LO:
3675 case R_PPC64_TPREL16_HI:
3676 case R_PPC64_TPREL16_HA:
3677 case R_PPC64_TPREL16_DS:
3678 case R_PPC64_TPREL16_LO_DS:
3679 case R_PPC64_TPREL16_HIGH:
3680 case R_PPC64_TPREL16_HIGHA:
3681 case R_PPC64_TPREL16_HIGHER:
3682 case R_PPC64_TPREL16_HIGHERA:
3683 case R_PPC64_TPREL16_HIGHEST:
3684 case R_PPC64_TPREL16_HIGHESTA:
3685 case R_PPC64_TPREL64:
3686 return !info->executable;
3687 }
3688 }
3689
3690 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3691 copying dynamic variables from a shared lib into an app's dynbss
3692 section, and instead use a dynamic relocation to point into the
3693 shared lib. With code that gcc generates, it's vital that this be
3694 enabled; In the PowerPC64 ABI, the address of a function is actually
3695 the address of a function descriptor, which resides in the .opd
3696 section. gcc uses the descriptor directly rather than going via the
3697 GOT as some other ABI's do, which means that initialized function
3698 pointers must reference the descriptor. Thus, a function pointer
3699 initialized to the address of a function in a shared library will
3700 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3701 redefines the function descriptor symbol to point to the copy. This
3702 presents a problem as a plt entry for that function is also
3703 initialized from the function descriptor symbol and the copy reloc
3704 may not be initialized first. */
3705 #define ELIMINATE_COPY_RELOCS 1
3706
3707 /* Section name for stubs is the associated section name plus this
3708 string. */
3709 #define STUB_SUFFIX ".stub"
3710
3711 /* Linker stubs.
3712 ppc_stub_long_branch:
3713 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3714 destination, but a 24 bit branch in a stub section will reach.
3715 . b dest
3716
3717 ppc_stub_plt_branch:
3718 Similar to the above, but a 24 bit branch in the stub section won't
3719 reach its destination.
3720 . addis %r11,%r2,xxx@toc@ha
3721 . ld %r12,xxx@toc@l(%r11)
3722 . mtctr %r12
3723 . bctr
3724
3725 ppc_stub_plt_call:
3726 Used to call a function in a shared library. If it so happens that
3727 the plt entry referenced crosses a 64k boundary, then an extra
3728 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3729 . std %r2,40(%r1)
3730 . addis %r11,%r2,xxx@toc@ha
3731 . ld %r12,xxx+0@toc@l(%r11)
3732 . mtctr %r12
3733 . ld %r2,xxx+8@toc@l(%r11)
3734 . ld %r11,xxx+16@toc@l(%r11)
3735 . bctr
3736
3737 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3738 code to adjust the value and save r2 to support multiple toc sections.
3739 A ppc_stub_long_branch with an r2 offset looks like:
3740 . std %r2,40(%r1)
3741 . addis %r2,%r2,off@ha
3742 . addi %r2,%r2,off@l
3743 . b dest
3744
3745 A ppc_stub_plt_branch with an r2 offset looks like:
3746 . std %r2,40(%r1)
3747 . addis %r11,%r2,xxx@toc@ha
3748 . ld %r12,xxx@toc@l(%r11)
3749 . addis %r2,%r2,off@ha
3750 . addi %r2,%r2,off@l
3751 . mtctr %r12
3752 . bctr
3753
3754 In cases where the "addis" instruction would add zero, the "addis" is
3755 omitted and following instructions modified slightly in some cases.
3756 */
3757
3758 enum ppc_stub_type {
3759 ppc_stub_none,
3760 ppc_stub_long_branch,
3761 ppc_stub_long_branch_r2off,
3762 ppc_stub_plt_branch,
3763 ppc_stub_plt_branch_r2off,
3764 ppc_stub_plt_call,
3765 ppc_stub_plt_call_r2save
3766 };
3767
3768 struct ppc_stub_hash_entry {
3769
3770 /* Base hash table entry structure. */
3771 struct bfd_hash_entry root;
3772
3773 enum ppc_stub_type stub_type;
3774
3775 /* The stub section. */
3776 asection *stub_sec;
3777
3778 /* Offset within stub_sec of the beginning of this stub. */
3779 bfd_vma stub_offset;
3780
3781 /* Given the symbol's value and its section we can determine its final
3782 value when building the stubs (so the stub knows where to jump. */
3783 bfd_vma target_value;
3784 asection *target_section;
3785
3786 /* The symbol table entry, if any, that this was derived from. */
3787 struct ppc_link_hash_entry *h;
3788 struct plt_entry *plt_ent;
3789
3790 /* Where this stub is being called from, or, in the case of combined
3791 stub sections, the first input section in the group. */
3792 asection *id_sec;
3793
3794 /* Symbol st_other. */
3795 unsigned char other;
3796 };
3797
3798 struct ppc_branch_hash_entry {
3799
3800 /* Base hash table entry structure. */
3801 struct bfd_hash_entry root;
3802
3803 /* Offset within branch lookup table. */
3804 unsigned int offset;
3805
3806 /* Generation marker. */
3807 unsigned int iter;
3808 };
3809
3810 /* Used to track dynamic relocations for local symbols. */
3811 struct ppc_dyn_relocs
3812 {
3813 struct ppc_dyn_relocs *next;
3814
3815 /* The input section of the reloc. */
3816 asection *sec;
3817
3818 /* Total number of relocs copied for the input section. */
3819 unsigned int count : 31;
3820
3821 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3822 unsigned int ifunc : 1;
3823 };
3824
3825 struct ppc_link_hash_entry
3826 {
3827 struct elf_link_hash_entry elf;
3828
3829 union {
3830 /* A pointer to the most recently used stub hash entry against this
3831 symbol. */
3832 struct ppc_stub_hash_entry *stub_cache;
3833
3834 /* A pointer to the next symbol starting with a '.' */
3835 struct ppc_link_hash_entry *next_dot_sym;
3836 } u;
3837
3838 /* Track dynamic relocs copied for this symbol. */
3839 struct elf_dyn_relocs *dyn_relocs;
3840
3841 /* Link between function code and descriptor symbols. */
3842 struct ppc_link_hash_entry *oh;
3843
3844 /* Flag function code and descriptor symbols. */
3845 unsigned int is_func:1;
3846 unsigned int is_func_descriptor:1;
3847 unsigned int fake:1;
3848
3849 /* Whether global opd/toc sym has been adjusted or not.
3850 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3851 should be set for all globals defined in any opd/toc section. */
3852 unsigned int adjust_done:1;
3853
3854 /* Set if we twiddled this symbol to weak at some stage. */
3855 unsigned int was_undefined:1;
3856
3857 /* Contexts in which symbol is used in the GOT (or TOC).
3858 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3859 corresponding relocs are encountered during check_relocs.
3860 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3861 indicate the corresponding GOT entry type is not needed.
3862 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3863 a TPREL one. We use a separate flag rather than setting TPREL
3864 just for convenience in distinguishing the two cases. */
3865 #define TLS_GD 1 /* GD reloc. */
3866 #define TLS_LD 2 /* LD reloc. */
3867 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3868 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3869 #define TLS_TLS 16 /* Any TLS reloc. */
3870 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3871 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3872 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3873 unsigned char tls_mask;
3874 };
3875
3876 /* ppc64 ELF linker hash table. */
3877
3878 struct ppc_link_hash_table
3879 {
3880 struct elf_link_hash_table elf;
3881
3882 /* The stub hash table. */
3883 struct bfd_hash_table stub_hash_table;
3884
3885 /* Another hash table for plt_branch stubs. */
3886 struct bfd_hash_table branch_hash_table;
3887
3888 /* Hash table for function prologue tocsave. */
3889 htab_t tocsave_htab;
3890
3891 /* Various options and other info passed from the linker. */
3892 struct ppc64_elf_params *params;
3893
3894 /* Array to keep track of which stub sections have been created, and
3895 information on stub grouping. */
3896 struct map_stub {
3897 /* This is the section to which stubs in the group will be attached. */
3898 asection *link_sec;
3899 /* The stub section. */
3900 asection *stub_sec;
3901 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3902 bfd_vma toc_off;
3903 } *stub_group;
3904
3905 /* Temp used when calculating TOC pointers. */
3906 bfd_vma toc_curr;
3907 bfd *toc_bfd;
3908 asection *toc_first_sec;
3909
3910 /* Highest input section id. */
3911 int top_id;
3912
3913 /* Highest output section index. */
3914 int top_index;
3915
3916 /* Used when adding symbols. */
3917 struct ppc_link_hash_entry *dot_syms;
3918
3919 /* List of input sections for each output section. */
3920 asection **input_list;
3921
3922 /* Shortcuts to get to dynamic linker sections. */
3923 asection *dynbss;
3924 asection *relbss;
3925 asection *glink;
3926 asection *sfpr;
3927 asection *brlt;
3928 asection *relbrlt;
3929 asection *glink_eh_frame;
3930
3931 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3932 struct ppc_link_hash_entry *tls_get_addr;
3933 struct ppc_link_hash_entry *tls_get_addr_fd;
3934
3935 /* The size of reliplt used by got entry relocs. */
3936 bfd_size_type got_reli_size;
3937
3938 /* Statistics. */
3939 unsigned long stub_count[ppc_stub_plt_call_r2save];
3940
3941 /* Number of stubs against global syms. */
3942 unsigned long stub_globals;
3943
3944 /* Set if we're linking code with function descriptors. */
3945 unsigned int opd_abi:1;
3946
3947 /* Support for multiple toc sections. */
3948 unsigned int do_multi_toc:1;
3949 unsigned int multi_toc_needed:1;
3950 unsigned int second_toc_pass:1;
3951 unsigned int do_toc_opt:1;
3952
3953 /* Set on error. */
3954 unsigned int stub_error:1;
3955
3956 /* Temp used by ppc64_elf_process_dot_syms. */
3957 unsigned int twiddled_syms:1;
3958
3959 /* Incremented every time we size stubs. */
3960 unsigned int stub_iteration;
3961
3962 /* Small local sym cache. */
3963 struct sym_cache sym_cache;
3964 };
3965
3966 /* Rename some of the generic section flags to better document how they
3967 are used here. */
3968
3969 /* Nonzero if this section has TLS related relocations. */
3970 #define has_tls_reloc sec_flg0
3971
3972 /* Nonzero if this section has a call to __tls_get_addr. */
3973 #define has_tls_get_addr_call sec_flg1
3974
3975 /* Nonzero if this section has any toc or got relocs. */
3976 #define has_toc_reloc sec_flg2
3977
3978 /* Nonzero if this section has a call to another section that uses
3979 the toc or got. */
3980 #define makes_toc_func_call sec_flg3
3981
3982 /* Recursion protection when determining above flag. */
3983 #define call_check_in_progress sec_flg4
3984 #define call_check_done sec_flg5
3985
3986 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3987
3988 #define ppc_hash_table(p) \
3989 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3990 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3991
3992 #define ppc_stub_hash_lookup(table, string, create, copy) \
3993 ((struct ppc_stub_hash_entry *) \
3994 bfd_hash_lookup ((table), (string), (create), (copy)))
3995
3996 #define ppc_branch_hash_lookup(table, string, create, copy) \
3997 ((struct ppc_branch_hash_entry *) \
3998 bfd_hash_lookup ((table), (string), (create), (copy)))
3999
4000 /* Create an entry in the stub hash table. */
4001
4002 static struct bfd_hash_entry *
4003 stub_hash_newfunc (struct bfd_hash_entry *entry,
4004 struct bfd_hash_table *table,
4005 const char *string)
4006 {
4007 /* Allocate the structure if it has not already been allocated by a
4008 subclass. */
4009 if (entry == NULL)
4010 {
4011 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4012 if (entry == NULL)
4013 return entry;
4014 }
4015
4016 /* Call the allocation method of the superclass. */
4017 entry = bfd_hash_newfunc (entry, table, string);
4018 if (entry != NULL)
4019 {
4020 struct ppc_stub_hash_entry *eh;
4021
4022 /* Initialize the local fields. */
4023 eh = (struct ppc_stub_hash_entry *) entry;
4024 eh->stub_type = ppc_stub_none;
4025 eh->stub_sec = NULL;
4026 eh->stub_offset = 0;
4027 eh->target_value = 0;
4028 eh->target_section = NULL;
4029 eh->h = NULL;
4030 eh->plt_ent = NULL;
4031 eh->id_sec = NULL;
4032 eh->other = 0;
4033 }
4034
4035 return entry;
4036 }
4037
4038 /* Create an entry in the branch hash table. */
4039
4040 static struct bfd_hash_entry *
4041 branch_hash_newfunc (struct bfd_hash_entry *entry,
4042 struct bfd_hash_table *table,
4043 const char *string)
4044 {
4045 /* Allocate the structure if it has not already been allocated by a
4046 subclass. */
4047 if (entry == NULL)
4048 {
4049 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4050 if (entry == NULL)
4051 return entry;
4052 }
4053
4054 /* Call the allocation method of the superclass. */
4055 entry = bfd_hash_newfunc (entry, table, string);
4056 if (entry != NULL)
4057 {
4058 struct ppc_branch_hash_entry *eh;
4059
4060 /* Initialize the local fields. */
4061 eh = (struct ppc_branch_hash_entry *) entry;
4062 eh->offset = 0;
4063 eh->iter = 0;
4064 }
4065
4066 return entry;
4067 }
4068
4069 /* Create an entry in a ppc64 ELF linker hash table. */
4070
4071 static struct bfd_hash_entry *
4072 link_hash_newfunc (struct bfd_hash_entry *entry,
4073 struct bfd_hash_table *table,
4074 const char *string)
4075 {
4076 /* Allocate the structure if it has not already been allocated by a
4077 subclass. */
4078 if (entry == NULL)
4079 {
4080 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4081 if (entry == NULL)
4082 return entry;
4083 }
4084
4085 /* Call the allocation method of the superclass. */
4086 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4087 if (entry != NULL)
4088 {
4089 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4090
4091 memset (&eh->u.stub_cache, 0,
4092 (sizeof (struct ppc_link_hash_entry)
4093 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4094
4095 /* When making function calls, old ABI code references function entry
4096 points (dot symbols), while new ABI code references the function
4097 descriptor symbol. We need to make any combination of reference and
4098 definition work together, without breaking archive linking.
4099
4100 For a defined function "foo" and an undefined call to "bar":
4101 An old object defines "foo" and ".foo", references ".bar" (possibly
4102 "bar" too).
4103 A new object defines "foo" and references "bar".
4104
4105 A new object thus has no problem with its undefined symbols being
4106 satisfied by definitions in an old object. On the other hand, the
4107 old object won't have ".bar" satisfied by a new object.
4108
4109 Keep a list of newly added dot-symbols. */
4110
4111 if (string[0] == '.')
4112 {
4113 struct ppc_link_hash_table *htab;
4114
4115 htab = (struct ppc_link_hash_table *) table;
4116 eh->u.next_dot_sym = htab->dot_syms;
4117 htab->dot_syms = eh;
4118 }
4119 }
4120
4121 return entry;
4122 }
4123
4124 struct tocsave_entry {
4125 asection *sec;
4126 bfd_vma offset;
4127 };
4128
4129 static hashval_t
4130 tocsave_htab_hash (const void *p)
4131 {
4132 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4133 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4134 }
4135
4136 static int
4137 tocsave_htab_eq (const void *p1, const void *p2)
4138 {
4139 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4140 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4141 return e1->sec == e2->sec && e1->offset == e2->offset;
4142 }
4143
4144 /* Create a ppc64 ELF linker hash table. */
4145
4146 static struct bfd_link_hash_table *
4147 ppc64_elf_link_hash_table_create (bfd *abfd)
4148 {
4149 struct ppc_link_hash_table *htab;
4150 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4151
4152 htab = bfd_zmalloc (amt);
4153 if (htab == NULL)
4154 return NULL;
4155
4156 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4157 sizeof (struct ppc_link_hash_entry),
4158 PPC64_ELF_DATA))
4159 {
4160 free (htab);
4161 return NULL;
4162 }
4163
4164 /* Init the stub hash table too. */
4165 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4166 sizeof (struct ppc_stub_hash_entry)))
4167 {
4168 _bfd_elf_link_hash_table_free ((struct bfd_link_hash_table *) htab);
4169 return NULL;
4170 }
4171
4172 /* And the branch hash table. */
4173 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4174 sizeof (struct ppc_branch_hash_entry)))
4175 {
4176 bfd_hash_table_free (&htab->stub_hash_table);
4177 _bfd_elf_link_hash_table_free ((struct bfd_link_hash_table *) htab);
4178 return NULL;
4179 }
4180
4181 htab->tocsave_htab = htab_try_create (1024,
4182 tocsave_htab_hash,
4183 tocsave_htab_eq,
4184 NULL);
4185 if (htab->tocsave_htab == NULL)
4186 {
4187 bfd_hash_table_free (&htab->branch_hash_table);
4188 bfd_hash_table_free (&htab->stub_hash_table);
4189 _bfd_elf_link_hash_table_free ((struct bfd_link_hash_table *) htab);
4190 return NULL;
4191 }
4192
4193 /* Initializing two fields of the union is just cosmetic. We really
4194 only care about glist, but when compiled on a 32-bit host the
4195 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4196 debugger inspection of these fields look nicer. */
4197 htab->elf.init_got_refcount.refcount = 0;
4198 htab->elf.init_got_refcount.glist = NULL;
4199 htab->elf.init_plt_refcount.refcount = 0;
4200 htab->elf.init_plt_refcount.glist = NULL;
4201 htab->elf.init_got_offset.offset = 0;
4202 htab->elf.init_got_offset.glist = NULL;
4203 htab->elf.init_plt_offset.offset = 0;
4204 htab->elf.init_plt_offset.glist = NULL;
4205
4206 return &htab->elf.root;
4207 }
4208
4209 /* Free the derived linker hash table. */
4210
4211 static void
4212 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4213 {
4214 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4215
4216 bfd_hash_table_free (&htab->stub_hash_table);
4217 bfd_hash_table_free (&htab->branch_hash_table);
4218 if (htab->tocsave_htab)
4219 htab_delete (htab->tocsave_htab);
4220 _bfd_elf_link_hash_table_free (hash);
4221 }
4222
4223 /* Create sections for linker generated code. */
4224
4225 static bfd_boolean
4226 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4227 {
4228 struct ppc_link_hash_table *htab;
4229 flagword flags;
4230
4231 htab = ppc_hash_table (info);
4232
4233 /* Create .sfpr for code to save and restore fp regs. */
4234 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4235 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4236 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4237 flags);
4238 if (htab->sfpr == NULL
4239 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4240 return FALSE;
4241
4242 /* Create .glink for lazy dynamic linking support. */
4243 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4244 flags);
4245 if (htab->glink == NULL
4246 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4247 return FALSE;
4248
4249 if (!info->no_ld_generated_unwind_info)
4250 {
4251 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4252 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4253 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4254 ".eh_frame",
4255 flags);
4256 if (htab->glink_eh_frame == NULL
4257 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4258 return FALSE;
4259 }
4260
4261 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4262 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4263 if (htab->elf.iplt == NULL
4264 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4265 return FALSE;
4266
4267 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4268 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4269 htab->elf.irelplt
4270 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4271 if (htab->elf.irelplt == NULL
4272 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4273 return FALSE;
4274
4275 /* Create branch lookup table for plt_branch stubs. */
4276 flags = (SEC_ALLOC | SEC_LOAD
4277 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4278 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4279 flags);
4280 if (htab->brlt == NULL
4281 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4282 return FALSE;
4283
4284 if (!info->shared)
4285 return TRUE;
4286
4287 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4288 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4289 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4290 ".rela.branch_lt",
4291 flags);
4292 if (htab->relbrlt == NULL
4293 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4294 return FALSE;
4295
4296 return TRUE;
4297 }
4298
4299 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4300
4301 bfd_boolean
4302 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4303 struct ppc64_elf_params *params)
4304 {
4305 struct ppc_link_hash_table *htab;
4306
4307 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4308
4309 /* Always hook our dynamic sections into the first bfd, which is the
4310 linker created stub bfd. This ensures that the GOT header is at
4311 the start of the output TOC section. */
4312 htab = ppc_hash_table (info);
4313 if (htab == NULL)
4314 return FALSE;
4315 htab->elf.dynobj = params->stub_bfd;
4316 htab->params = params;
4317
4318 if (info->relocatable)
4319 return TRUE;
4320
4321 return create_linkage_sections (htab->elf.dynobj, info);
4322 }
4323
4324 /* Build a name for an entry in the stub hash table. */
4325
4326 static char *
4327 ppc_stub_name (const asection *input_section,
4328 const asection *sym_sec,
4329 const struct ppc_link_hash_entry *h,
4330 const Elf_Internal_Rela *rel)
4331 {
4332 char *stub_name;
4333 ssize_t len;
4334
4335 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4336 offsets from a sym as a branch target? In fact, we could
4337 probably assume the addend is always zero. */
4338 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4339
4340 if (h)
4341 {
4342 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4343 stub_name = bfd_malloc (len);
4344 if (stub_name == NULL)
4345 return stub_name;
4346
4347 len = sprintf (stub_name, "%08x.%s+%x",
4348 input_section->id & 0xffffffff,
4349 h->elf.root.root.string,
4350 (int) rel->r_addend & 0xffffffff);
4351 }
4352 else
4353 {
4354 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4355 stub_name = bfd_malloc (len);
4356 if (stub_name == NULL)
4357 return stub_name;
4358
4359 len = sprintf (stub_name, "%08x.%x:%x+%x",
4360 input_section->id & 0xffffffff,
4361 sym_sec->id & 0xffffffff,
4362 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4363 (int) rel->r_addend & 0xffffffff);
4364 }
4365 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4366 stub_name[len - 2] = 0;
4367 return stub_name;
4368 }
4369
4370 /* Look up an entry in the stub hash. Stub entries are cached because
4371 creating the stub name takes a bit of time. */
4372
4373 static struct ppc_stub_hash_entry *
4374 ppc_get_stub_entry (const asection *input_section,
4375 const asection *sym_sec,
4376 struct ppc_link_hash_entry *h,
4377 const Elf_Internal_Rela *rel,
4378 struct ppc_link_hash_table *htab)
4379 {
4380 struct ppc_stub_hash_entry *stub_entry;
4381 const asection *id_sec;
4382
4383 /* If this input section is part of a group of sections sharing one
4384 stub section, then use the id of the first section in the group.
4385 Stub names need to include a section id, as there may well be
4386 more than one stub used to reach say, printf, and we need to
4387 distinguish between them. */
4388 id_sec = htab->stub_group[input_section->id].link_sec;
4389
4390 if (h != NULL && h->u.stub_cache != NULL
4391 && h->u.stub_cache->h == h
4392 && h->u.stub_cache->id_sec == id_sec)
4393 {
4394 stub_entry = h->u.stub_cache;
4395 }
4396 else
4397 {
4398 char *stub_name;
4399
4400 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4401 if (stub_name == NULL)
4402 return NULL;
4403
4404 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4405 stub_name, FALSE, FALSE);
4406 if (h != NULL)
4407 h->u.stub_cache = stub_entry;
4408
4409 free (stub_name);
4410 }
4411
4412 return stub_entry;
4413 }
4414
4415 /* Add a new stub entry to the stub hash. Not all fields of the new
4416 stub entry are initialised. */
4417
4418 static struct ppc_stub_hash_entry *
4419 ppc_add_stub (const char *stub_name,
4420 asection *section,
4421 struct bfd_link_info *info)
4422 {
4423 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4424 asection *link_sec;
4425 asection *stub_sec;
4426 struct ppc_stub_hash_entry *stub_entry;
4427
4428 link_sec = htab->stub_group[section->id].link_sec;
4429 stub_sec = htab->stub_group[section->id].stub_sec;
4430 if (stub_sec == NULL)
4431 {
4432 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4433 if (stub_sec == NULL)
4434 {
4435 size_t namelen;
4436 bfd_size_type len;
4437 char *s_name;
4438
4439 namelen = strlen (link_sec->name);
4440 len = namelen + sizeof (STUB_SUFFIX);
4441 s_name = bfd_alloc (htab->params->stub_bfd, len);
4442 if (s_name == NULL)
4443 return NULL;
4444
4445 memcpy (s_name, link_sec->name, namelen);
4446 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4447 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4448 if (stub_sec == NULL)
4449 return NULL;
4450 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4451 }
4452 htab->stub_group[section->id].stub_sec = stub_sec;
4453 }
4454
4455 /* Enter this entry into the linker stub hash table. */
4456 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4457 TRUE, FALSE);
4458 if (stub_entry == NULL)
4459 {
4460 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4461 section->owner, stub_name);
4462 return NULL;
4463 }
4464
4465 stub_entry->stub_sec = stub_sec;
4466 stub_entry->stub_offset = 0;
4467 stub_entry->id_sec = link_sec;
4468 return stub_entry;
4469 }
4470
4471 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4472 not already done. */
4473
4474 static bfd_boolean
4475 create_got_section (bfd *abfd, struct bfd_link_info *info)
4476 {
4477 asection *got, *relgot;
4478 flagword flags;
4479 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4480
4481 if (!is_ppc64_elf (abfd))
4482 return FALSE;
4483 if (htab == NULL)
4484 return FALSE;
4485
4486 if (!htab->elf.sgot
4487 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4488 return FALSE;
4489
4490 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4491 | SEC_LINKER_CREATED);
4492
4493 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4494 if (!got
4495 || !bfd_set_section_alignment (abfd, got, 3))
4496 return FALSE;
4497
4498 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4499 flags | SEC_READONLY);
4500 if (!relgot
4501 || ! bfd_set_section_alignment (abfd, relgot, 3))
4502 return FALSE;
4503
4504 ppc64_elf_tdata (abfd)->got = got;
4505 ppc64_elf_tdata (abfd)->relgot = relgot;
4506 return TRUE;
4507 }
4508
4509 /* Create the dynamic sections, and set up shortcuts. */
4510
4511 static bfd_boolean
4512 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4513 {
4514 struct ppc_link_hash_table *htab;
4515
4516 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4517 return FALSE;
4518
4519 htab = ppc_hash_table (info);
4520 if (htab == NULL)
4521 return FALSE;
4522
4523 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4524 if (!info->shared)
4525 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4526
4527 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4528 || (!info->shared && !htab->relbss))
4529 abort ();
4530
4531 return TRUE;
4532 }
4533
4534 /* Follow indirect and warning symbol links. */
4535
4536 static inline struct bfd_link_hash_entry *
4537 follow_link (struct bfd_link_hash_entry *h)
4538 {
4539 while (h->type == bfd_link_hash_indirect
4540 || h->type == bfd_link_hash_warning)
4541 h = h->u.i.link;
4542 return h;
4543 }
4544
4545 static inline struct elf_link_hash_entry *
4546 elf_follow_link (struct elf_link_hash_entry *h)
4547 {
4548 return (struct elf_link_hash_entry *) follow_link (&h->root);
4549 }
4550
4551 static inline struct ppc_link_hash_entry *
4552 ppc_follow_link (struct ppc_link_hash_entry *h)
4553 {
4554 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4555 }
4556
4557 /* Merge PLT info on FROM with that on TO. */
4558
4559 static void
4560 move_plt_plist (struct ppc_link_hash_entry *from,
4561 struct ppc_link_hash_entry *to)
4562 {
4563 if (from->elf.plt.plist != NULL)
4564 {
4565 if (to->elf.plt.plist != NULL)
4566 {
4567 struct plt_entry **entp;
4568 struct plt_entry *ent;
4569
4570 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4571 {
4572 struct plt_entry *dent;
4573
4574 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4575 if (dent->addend == ent->addend)
4576 {
4577 dent->plt.refcount += ent->plt.refcount;
4578 *entp = ent->next;
4579 break;
4580 }
4581 if (dent == NULL)
4582 entp = &ent->next;
4583 }
4584 *entp = to->elf.plt.plist;
4585 }
4586
4587 to->elf.plt.plist = from->elf.plt.plist;
4588 from->elf.plt.plist = NULL;
4589 }
4590 }
4591
4592 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4593
4594 static void
4595 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4596 struct elf_link_hash_entry *dir,
4597 struct elf_link_hash_entry *ind)
4598 {
4599 struct ppc_link_hash_entry *edir, *eind;
4600
4601 edir = (struct ppc_link_hash_entry *) dir;
4602 eind = (struct ppc_link_hash_entry *) ind;
4603
4604 edir->is_func |= eind->is_func;
4605 edir->is_func_descriptor |= eind->is_func_descriptor;
4606 edir->tls_mask |= eind->tls_mask;
4607 if (eind->oh != NULL)
4608 edir->oh = ppc_follow_link (eind->oh);
4609
4610 /* If called to transfer flags for a weakdef during processing
4611 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4612 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4613 if (!(ELIMINATE_COPY_RELOCS
4614 && eind->elf.root.type != bfd_link_hash_indirect
4615 && edir->elf.dynamic_adjusted))
4616 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4617
4618 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4619 edir->elf.ref_regular |= eind->elf.ref_regular;
4620 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4621 edir->elf.needs_plt |= eind->elf.needs_plt;
4622 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4623
4624 /* Copy over any dynamic relocs we may have on the indirect sym. */
4625 if (eind->dyn_relocs != NULL)
4626 {
4627 if (edir->dyn_relocs != NULL)
4628 {
4629 struct elf_dyn_relocs **pp;
4630 struct elf_dyn_relocs *p;
4631
4632 /* Add reloc counts against the indirect sym to the direct sym
4633 list. Merge any entries against the same section. */
4634 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4635 {
4636 struct elf_dyn_relocs *q;
4637
4638 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4639 if (q->sec == p->sec)
4640 {
4641 q->pc_count += p->pc_count;
4642 q->count += p->count;
4643 *pp = p->next;
4644 break;
4645 }
4646 if (q == NULL)
4647 pp = &p->next;
4648 }
4649 *pp = edir->dyn_relocs;
4650 }
4651
4652 edir->dyn_relocs = eind->dyn_relocs;
4653 eind->dyn_relocs = NULL;
4654 }
4655
4656 /* If we were called to copy over info for a weak sym, that's all.
4657 You might think dyn_relocs need not be copied over; After all,
4658 both syms will be dynamic or both non-dynamic so we're just
4659 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4660 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4661 dyn_relocs in read-only sections, and it does so on what is the
4662 DIR sym here. */
4663 if (eind->elf.root.type != bfd_link_hash_indirect)
4664 return;
4665
4666 /* Copy over got entries that we may have already seen to the
4667 symbol which just became indirect. */
4668 if (eind->elf.got.glist != NULL)
4669 {
4670 if (edir->elf.got.glist != NULL)
4671 {
4672 struct got_entry **entp;
4673 struct got_entry *ent;
4674
4675 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4676 {
4677 struct got_entry *dent;
4678
4679 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4680 if (dent->addend == ent->addend
4681 && dent->owner == ent->owner
4682 && dent->tls_type == ent->tls_type)
4683 {
4684 dent->got.refcount += ent->got.refcount;
4685 *entp = ent->next;
4686 break;
4687 }
4688 if (dent == NULL)
4689 entp = &ent->next;
4690 }
4691 *entp = edir->elf.got.glist;
4692 }
4693
4694 edir->elf.got.glist = eind->elf.got.glist;
4695 eind->elf.got.glist = NULL;
4696 }
4697
4698 /* And plt entries. */
4699 move_plt_plist (eind, edir);
4700
4701 if (eind->elf.dynindx != -1)
4702 {
4703 if (edir->elf.dynindx != -1)
4704 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4705 edir->elf.dynstr_index);
4706 edir->elf.dynindx = eind->elf.dynindx;
4707 edir->elf.dynstr_index = eind->elf.dynstr_index;
4708 eind->elf.dynindx = -1;
4709 eind->elf.dynstr_index = 0;
4710 }
4711 }
4712
4713 /* Find the function descriptor hash entry from the given function code
4714 hash entry FH. Link the entries via their OH fields. */
4715
4716 static struct ppc_link_hash_entry *
4717 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4718 {
4719 struct ppc_link_hash_entry *fdh = fh->oh;
4720
4721 if (fdh == NULL)
4722 {
4723 const char *fd_name = fh->elf.root.root.string + 1;
4724
4725 fdh = (struct ppc_link_hash_entry *)
4726 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4727 if (fdh == NULL)
4728 return fdh;
4729
4730 fdh->is_func_descriptor = 1;
4731 fdh->oh = fh;
4732 fh->is_func = 1;
4733 fh->oh = fdh;
4734 }
4735
4736 return ppc_follow_link (fdh);
4737 }
4738
4739 /* Make a fake function descriptor sym for the code sym FH. */
4740
4741 static struct ppc_link_hash_entry *
4742 make_fdh (struct bfd_link_info *info,
4743 struct ppc_link_hash_entry *fh)
4744 {
4745 bfd *abfd;
4746 asymbol *newsym;
4747 struct bfd_link_hash_entry *bh;
4748 struct ppc_link_hash_entry *fdh;
4749
4750 abfd = fh->elf.root.u.undef.abfd;
4751 newsym = bfd_make_empty_symbol (abfd);
4752 newsym->name = fh->elf.root.root.string + 1;
4753 newsym->section = bfd_und_section_ptr;
4754 newsym->value = 0;
4755 newsym->flags = BSF_WEAK;
4756
4757 bh = NULL;
4758 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4759 newsym->flags, newsym->section,
4760 newsym->value, NULL, FALSE, FALSE,
4761 &bh))
4762 return NULL;
4763
4764 fdh = (struct ppc_link_hash_entry *) bh;
4765 fdh->elf.non_elf = 0;
4766 fdh->fake = 1;
4767 fdh->is_func_descriptor = 1;
4768 fdh->oh = fh;
4769 fh->is_func = 1;
4770 fh->oh = fdh;
4771 return fdh;
4772 }
4773
4774 /* Fix function descriptor symbols defined in .opd sections to be
4775 function type. */
4776
4777 static bfd_boolean
4778 ppc64_elf_add_symbol_hook (bfd *ibfd,
4779 struct bfd_link_info *info,
4780 Elf_Internal_Sym *isym,
4781 const char **name,
4782 flagword *flags ATTRIBUTE_UNUSED,
4783 asection **sec,
4784 bfd_vma *value ATTRIBUTE_UNUSED)
4785 {
4786 if ((ibfd->flags & DYNAMIC) == 0
4787 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4788 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4789
4790 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4791 {
4792 if ((ibfd->flags & DYNAMIC) == 0)
4793 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4794 }
4795 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4796 ;
4797 else if (*sec != NULL
4798 && strcmp ((*sec)->name, ".opd") == 0)
4799 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4800
4801 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4802 {
4803 if (abiversion (ibfd) == 0)
4804 set_abiversion (ibfd, 2);
4805 else if (abiversion (ibfd) == 1)
4806 {
4807 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4808 " for ABI version 1\n"), name);
4809 bfd_set_error (bfd_error_bad_value);
4810 return FALSE;
4811 }
4812 }
4813
4814 return TRUE;
4815 }
4816
4817 /* Merge non-visibility st_other attributes: local entry point. */
4818
4819 static void
4820 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4821 const Elf_Internal_Sym *isym,
4822 bfd_boolean definition,
4823 bfd_boolean dynamic)
4824 {
4825 if (definition && !dynamic)
4826 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4827 | ELF_ST_VISIBILITY (h->other));
4828 }
4829
4830 /* This function makes an old ABI object reference to ".bar" cause the
4831 inclusion of a new ABI object archive that defines "bar".
4832 NAME is a symbol defined in an archive. Return a symbol in the hash
4833 table that might be satisfied by the archive symbols. */
4834
4835 static struct elf_link_hash_entry *
4836 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4837 struct bfd_link_info *info,
4838 const char *name)
4839 {
4840 struct elf_link_hash_entry *h;
4841 char *dot_name;
4842 size_t len;
4843
4844 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4845 if (h != NULL
4846 /* Don't return this sym if it is a fake function descriptor
4847 created by add_symbol_adjust. */
4848 && !(h->root.type == bfd_link_hash_undefweak
4849 && ((struct ppc_link_hash_entry *) h)->fake))
4850 return h;
4851
4852 if (name[0] == '.')
4853 return h;
4854
4855 len = strlen (name);
4856 dot_name = bfd_alloc (abfd, len + 2);
4857 if (dot_name == NULL)
4858 return (struct elf_link_hash_entry *) 0 - 1;
4859 dot_name[0] = '.';
4860 memcpy (dot_name + 1, name, len + 1);
4861 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4862 bfd_release (abfd, dot_name);
4863 return h;
4864 }
4865
4866 /* This function satisfies all old ABI object references to ".bar" if a
4867 new ABI object defines "bar". Well, at least, undefined dot symbols
4868 are made weak. This stops later archive searches from including an
4869 object if we already have a function descriptor definition. It also
4870 prevents the linker complaining about undefined symbols.
4871 We also check and correct mismatched symbol visibility here. The
4872 most restrictive visibility of the function descriptor and the
4873 function entry symbol is used. */
4874
4875 static bfd_boolean
4876 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4877 {
4878 struct ppc_link_hash_table *htab;
4879 struct ppc_link_hash_entry *fdh;
4880
4881 if (eh->elf.root.type == bfd_link_hash_indirect)
4882 return TRUE;
4883
4884 if (eh->elf.root.type == bfd_link_hash_warning)
4885 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4886
4887 if (eh->elf.root.root.string[0] != '.')
4888 abort ();
4889
4890 htab = ppc_hash_table (info);
4891 if (htab == NULL)
4892 return FALSE;
4893
4894 fdh = lookup_fdh (eh, htab);
4895 if (fdh == NULL)
4896 {
4897 if (!info->relocatable
4898 && (eh->elf.root.type == bfd_link_hash_undefined
4899 || eh->elf.root.type == bfd_link_hash_undefweak)
4900 && eh->elf.ref_regular)
4901 {
4902 /* Make an undefweak function descriptor sym, which is enough to
4903 pull in an --as-needed shared lib, but won't cause link
4904 errors. Archives are handled elsewhere. */
4905 fdh = make_fdh (info, eh);
4906 if (fdh == NULL)
4907 return FALSE;
4908 fdh->elf.ref_regular = 1;
4909 }
4910 }
4911 else
4912 {
4913 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4914 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4915 if (entry_vis < descr_vis)
4916 fdh->elf.other += entry_vis - descr_vis;
4917 else if (entry_vis > descr_vis)
4918 eh->elf.other += descr_vis - entry_vis;
4919
4920 if ((fdh->elf.root.type == bfd_link_hash_defined
4921 || fdh->elf.root.type == bfd_link_hash_defweak)
4922 && eh->elf.root.type == bfd_link_hash_undefined)
4923 {
4924 eh->elf.root.type = bfd_link_hash_undefweak;
4925 eh->was_undefined = 1;
4926 htab->twiddled_syms = 1;
4927 }
4928 }
4929
4930 return TRUE;
4931 }
4932
4933 /* Process list of dot-symbols we made in link_hash_newfunc. */
4934
4935 static bfd_boolean
4936 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4937 {
4938 struct ppc_link_hash_table *htab;
4939 struct ppc_link_hash_entry **p, *eh;
4940
4941 if (!is_ppc64_elf (info->output_bfd))
4942 return TRUE;
4943 htab = ppc_hash_table (info);
4944 if (htab == NULL)
4945 return FALSE;
4946
4947 if (is_ppc64_elf (ibfd))
4948 {
4949 p = &htab->dot_syms;
4950 while ((eh = *p) != NULL)
4951 {
4952 *p = NULL;
4953 if (&eh->elf == htab->elf.hgot)
4954 ;
4955 else if (htab->elf.hgot == NULL
4956 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
4957 htab->elf.hgot = &eh->elf;
4958 else if (!add_symbol_adjust (eh, info))
4959 return FALSE;
4960 p = &eh->u.next_dot_sym;
4961 }
4962 }
4963
4964 /* Clear the list for non-ppc64 input files. */
4965 p = &htab->dot_syms;
4966 while ((eh = *p) != NULL)
4967 {
4968 *p = NULL;
4969 p = &eh->u.next_dot_sym;
4970 }
4971
4972 /* We need to fix the undefs list for any syms we have twiddled to
4973 undef_weak. */
4974 if (htab->twiddled_syms)
4975 {
4976 bfd_link_repair_undef_list (&htab->elf.root);
4977 htab->twiddled_syms = 0;
4978 }
4979 return TRUE;
4980 }
4981
4982 /* Undo hash table changes when an --as-needed input file is determined
4983 not to be needed. */
4984
4985 static bfd_boolean
4986 ppc64_elf_notice_as_needed (bfd *ibfd,
4987 struct bfd_link_info *info,
4988 enum notice_asneeded_action act)
4989 {
4990 if (act == notice_not_needed)
4991 {
4992 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4993
4994 if (htab == NULL)
4995 return FALSE;
4996
4997 htab->dot_syms = NULL;
4998 }
4999 return _bfd_elf_notice_as_needed (ibfd, info, act);
5000 }
5001
5002 /* If --just-symbols against a final linked binary, then assume we need
5003 toc adjusting stubs when calling functions defined there. */
5004
5005 static void
5006 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5007 {
5008 if ((sec->flags & SEC_CODE) != 0
5009 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5010 && is_ppc64_elf (sec->owner))
5011 {
5012 if (abiversion (sec->owner) >= 2
5013 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5014 sec->has_toc_reloc = 1;
5015 }
5016 _bfd_elf_link_just_syms (sec, info);
5017 }
5018
5019 static struct plt_entry **
5020 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5021 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5022 {
5023 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5024 struct plt_entry **local_plt;
5025 unsigned char *local_got_tls_masks;
5026
5027 if (local_got_ents == NULL)
5028 {
5029 bfd_size_type size = symtab_hdr->sh_info;
5030
5031 size *= (sizeof (*local_got_ents)
5032 + sizeof (*local_plt)
5033 + sizeof (*local_got_tls_masks));
5034 local_got_ents = bfd_zalloc (abfd, size);
5035 if (local_got_ents == NULL)
5036 return NULL;
5037 elf_local_got_ents (abfd) = local_got_ents;
5038 }
5039
5040 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5041 {
5042 struct got_entry *ent;
5043
5044 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5045 if (ent->addend == r_addend
5046 && ent->owner == abfd
5047 && ent->tls_type == tls_type)
5048 break;
5049 if (ent == NULL)
5050 {
5051 bfd_size_type amt = sizeof (*ent);
5052 ent = bfd_alloc (abfd, amt);
5053 if (ent == NULL)
5054 return FALSE;
5055 ent->next = local_got_ents[r_symndx];
5056 ent->addend = r_addend;
5057 ent->owner = abfd;
5058 ent->tls_type = tls_type;
5059 ent->is_indirect = FALSE;
5060 ent->got.refcount = 0;
5061 local_got_ents[r_symndx] = ent;
5062 }
5063 ent->got.refcount += 1;
5064 }
5065
5066 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5067 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5068 local_got_tls_masks[r_symndx] |= tls_type;
5069
5070 return local_plt + r_symndx;
5071 }
5072
5073 static bfd_boolean
5074 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5075 {
5076 struct plt_entry *ent;
5077
5078 for (ent = *plist; ent != NULL; ent = ent->next)
5079 if (ent->addend == addend)
5080 break;
5081 if (ent == NULL)
5082 {
5083 bfd_size_type amt = sizeof (*ent);
5084 ent = bfd_alloc (abfd, amt);
5085 if (ent == NULL)
5086 return FALSE;
5087 ent->next = *plist;
5088 ent->addend = addend;
5089 ent->plt.refcount = 0;
5090 *plist = ent;
5091 }
5092 ent->plt.refcount += 1;
5093 return TRUE;
5094 }
5095
5096 static bfd_boolean
5097 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5098 {
5099 return (r_type == R_PPC64_REL24
5100 || r_type == R_PPC64_REL14
5101 || r_type == R_PPC64_REL14_BRTAKEN
5102 || r_type == R_PPC64_REL14_BRNTAKEN
5103 || r_type == R_PPC64_ADDR24
5104 || r_type == R_PPC64_ADDR14
5105 || r_type == R_PPC64_ADDR14_BRTAKEN
5106 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5107 }
5108
5109 /* Look through the relocs for a section during the first phase, and
5110 calculate needed space in the global offset table, procedure
5111 linkage table, and dynamic reloc sections. */
5112
5113 static bfd_boolean
5114 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5115 asection *sec, const Elf_Internal_Rela *relocs)
5116 {
5117 struct ppc_link_hash_table *htab;
5118 Elf_Internal_Shdr *symtab_hdr;
5119 struct elf_link_hash_entry **sym_hashes;
5120 const Elf_Internal_Rela *rel;
5121 const Elf_Internal_Rela *rel_end;
5122 asection *sreloc;
5123 asection **opd_sym_map;
5124 struct elf_link_hash_entry *tga, *dottga;
5125
5126 if (info->relocatable)
5127 return TRUE;
5128
5129 /* Don't do anything special with non-loaded, non-alloced sections.
5130 In particular, any relocs in such sections should not affect GOT
5131 and PLT reference counting (ie. we don't allow them to create GOT
5132 or PLT entries), there's no possibility or desire to optimize TLS
5133 relocs, and there's not much point in propagating relocs to shared
5134 libs that the dynamic linker won't relocate. */
5135 if ((sec->flags & SEC_ALLOC) == 0)
5136 return TRUE;
5137
5138 BFD_ASSERT (is_ppc64_elf (abfd));
5139
5140 htab = ppc_hash_table (info);
5141 if (htab == NULL)
5142 return FALSE;
5143
5144 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5145 FALSE, FALSE, TRUE);
5146 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5147 FALSE, FALSE, TRUE);
5148 symtab_hdr = &elf_symtab_hdr (abfd);
5149 sym_hashes = elf_sym_hashes (abfd);
5150 sreloc = NULL;
5151 opd_sym_map = NULL;
5152 if (strcmp (sec->name, ".opd") == 0)
5153 {
5154 /* Garbage collection needs some extra help with .opd sections.
5155 We don't want to necessarily keep everything referenced by
5156 relocs in .opd, as that would keep all functions. Instead,
5157 if we reference an .opd symbol (a function descriptor), we
5158 want to keep the function code symbol's section. This is
5159 easy for global symbols, but for local syms we need to keep
5160 information about the associated function section. */
5161 bfd_size_type amt;
5162
5163 if (abiversion (abfd) == 0)
5164 set_abiversion (abfd, 1);
5165 else if (abiversion (abfd) == 2)
5166 {
5167 info->callbacks->einfo (_("%P: .opd not allowed in ABI version %d\n"),
5168 abiversion (abfd));
5169 bfd_set_error (bfd_error_bad_value);
5170 return FALSE;
5171 }
5172 amt = sec->size * sizeof (*opd_sym_map) / 8;
5173 opd_sym_map = bfd_zalloc (abfd, amt);
5174 if (opd_sym_map == NULL)
5175 return FALSE;
5176 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
5177 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
5178 ppc64_elf_section_data (sec)->sec_type = sec_opd;
5179 }
5180
5181 rel_end = relocs + sec->reloc_count;
5182 for (rel = relocs; rel < rel_end; rel++)
5183 {
5184 unsigned long r_symndx;
5185 struct elf_link_hash_entry *h;
5186 enum elf_ppc64_reloc_type r_type;
5187 int tls_type;
5188 struct _ppc64_elf_section_data *ppc64_sec;
5189 struct plt_entry **ifunc;
5190
5191 r_symndx = ELF64_R_SYM (rel->r_info);
5192 if (r_symndx < symtab_hdr->sh_info)
5193 h = NULL;
5194 else
5195 {
5196 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5197 h = elf_follow_link (h);
5198
5199 /* PR15323, ref flags aren't set for references in the same
5200 object. */
5201 h->root.non_ir_ref = 1;
5202
5203 if (h == htab->elf.hgot)
5204 sec->has_toc_reloc = 1;
5205 }
5206
5207 tls_type = 0;
5208 ifunc = NULL;
5209 if (h != NULL)
5210 {
5211 if (h->type == STT_GNU_IFUNC)
5212 {
5213 h->needs_plt = 1;
5214 ifunc = &h->plt.plist;
5215 }
5216 }
5217 else
5218 {
5219 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5220 abfd, r_symndx);
5221 if (isym == NULL)
5222 return FALSE;
5223
5224 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5225 {
5226 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5227 rel->r_addend, PLT_IFUNC);
5228 if (ifunc == NULL)
5229 return FALSE;
5230 }
5231 }
5232 r_type = ELF64_R_TYPE (rel->r_info);
5233 if (is_branch_reloc (r_type))
5234 {
5235 if (h != NULL && (h == tga || h == dottga))
5236 {
5237 if (rel != relocs
5238 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5239 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5240 /* We have a new-style __tls_get_addr call with a marker
5241 reloc. */
5242 ;
5243 else
5244 /* Mark this section as having an old-style call. */
5245 sec->has_tls_get_addr_call = 1;
5246 }
5247
5248 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5249 if (ifunc != NULL
5250 && !update_plt_info (abfd, ifunc, rel->r_addend))
5251 return FALSE;
5252 }
5253
5254 switch (r_type)
5255 {
5256 case R_PPC64_TLSGD:
5257 case R_PPC64_TLSLD:
5258 /* These special tls relocs tie a call to __tls_get_addr with
5259 its parameter symbol. */
5260 break;
5261
5262 case R_PPC64_GOT_TLSLD16:
5263 case R_PPC64_GOT_TLSLD16_LO:
5264 case R_PPC64_GOT_TLSLD16_HI:
5265 case R_PPC64_GOT_TLSLD16_HA:
5266 tls_type = TLS_TLS | TLS_LD;
5267 goto dogottls;
5268
5269 case R_PPC64_GOT_TLSGD16:
5270 case R_PPC64_GOT_TLSGD16_LO:
5271 case R_PPC64_GOT_TLSGD16_HI:
5272 case R_PPC64_GOT_TLSGD16_HA:
5273 tls_type = TLS_TLS | TLS_GD;
5274 goto dogottls;
5275
5276 case R_PPC64_GOT_TPREL16_DS:
5277 case R_PPC64_GOT_TPREL16_LO_DS:
5278 case R_PPC64_GOT_TPREL16_HI:
5279 case R_PPC64_GOT_TPREL16_HA:
5280 if (!info->executable)
5281 info->flags |= DF_STATIC_TLS;
5282 tls_type = TLS_TLS | TLS_TPREL;
5283 goto dogottls;
5284
5285 case R_PPC64_GOT_DTPREL16_DS:
5286 case R_PPC64_GOT_DTPREL16_LO_DS:
5287 case R_PPC64_GOT_DTPREL16_HI:
5288 case R_PPC64_GOT_DTPREL16_HA:
5289 tls_type = TLS_TLS | TLS_DTPREL;
5290 dogottls:
5291 sec->has_tls_reloc = 1;
5292 /* Fall thru */
5293
5294 case R_PPC64_GOT16:
5295 case R_PPC64_GOT16_DS:
5296 case R_PPC64_GOT16_HA:
5297 case R_PPC64_GOT16_HI:
5298 case R_PPC64_GOT16_LO:
5299 case R_PPC64_GOT16_LO_DS:
5300 /* This symbol requires a global offset table entry. */
5301 sec->has_toc_reloc = 1;
5302 if (r_type == R_PPC64_GOT_TLSLD16
5303 || r_type == R_PPC64_GOT_TLSGD16
5304 || r_type == R_PPC64_GOT_TPREL16_DS
5305 || r_type == R_PPC64_GOT_DTPREL16_DS
5306 || r_type == R_PPC64_GOT16
5307 || r_type == R_PPC64_GOT16_DS)
5308 {
5309 htab->do_multi_toc = 1;
5310 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5311 }
5312
5313 if (ppc64_elf_tdata (abfd)->got == NULL
5314 && !create_got_section (abfd, info))
5315 return FALSE;
5316
5317 if (h != NULL)
5318 {
5319 struct ppc_link_hash_entry *eh;
5320 struct got_entry *ent;
5321
5322 eh = (struct ppc_link_hash_entry *) h;
5323 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5324 if (ent->addend == rel->r_addend
5325 && ent->owner == abfd
5326 && ent->tls_type == tls_type)
5327 break;
5328 if (ent == NULL)
5329 {
5330 bfd_size_type amt = sizeof (*ent);
5331 ent = bfd_alloc (abfd, amt);
5332 if (ent == NULL)
5333 return FALSE;
5334 ent->next = eh->elf.got.glist;
5335 ent->addend = rel->r_addend;
5336 ent->owner = abfd;
5337 ent->tls_type = tls_type;
5338 ent->is_indirect = FALSE;
5339 ent->got.refcount = 0;
5340 eh->elf.got.glist = ent;
5341 }
5342 ent->got.refcount += 1;
5343 eh->tls_mask |= tls_type;
5344 }
5345 else
5346 /* This is a global offset table entry for a local symbol. */
5347 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5348 rel->r_addend, tls_type))
5349 return FALSE;
5350
5351 /* We may also need a plt entry if the symbol turns out to be
5352 an ifunc. */
5353 if (h != NULL && !info->shared && abiversion (abfd) == 2)
5354 {
5355 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5356 return FALSE;
5357 }
5358 break;
5359
5360 case R_PPC64_PLT16_HA:
5361 case R_PPC64_PLT16_HI:
5362 case R_PPC64_PLT16_LO:
5363 case R_PPC64_PLT32:
5364 case R_PPC64_PLT64:
5365 /* This symbol requires a procedure linkage table entry. We
5366 actually build the entry in adjust_dynamic_symbol,
5367 because this might be a case of linking PIC code without
5368 linking in any dynamic objects, in which case we don't
5369 need to generate a procedure linkage table after all. */
5370 if (h == NULL)
5371 {
5372 /* It does not make sense to have a procedure linkage
5373 table entry for a local symbol. */
5374 bfd_set_error (bfd_error_bad_value);
5375 return FALSE;
5376 }
5377 else
5378 {
5379 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5380 return FALSE;
5381 h->needs_plt = 1;
5382 if (h->root.root.string[0] == '.'
5383 && h->root.root.string[1] != '\0')
5384 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5385 }
5386 break;
5387
5388 /* The following relocations don't need to propagate the
5389 relocation if linking a shared object since they are
5390 section relative. */
5391 case R_PPC64_SECTOFF:
5392 case R_PPC64_SECTOFF_LO:
5393 case R_PPC64_SECTOFF_HI:
5394 case R_PPC64_SECTOFF_HA:
5395 case R_PPC64_SECTOFF_DS:
5396 case R_PPC64_SECTOFF_LO_DS:
5397 case R_PPC64_DTPREL16:
5398 case R_PPC64_DTPREL16_LO:
5399 case R_PPC64_DTPREL16_HI:
5400 case R_PPC64_DTPREL16_HA:
5401 case R_PPC64_DTPREL16_DS:
5402 case R_PPC64_DTPREL16_LO_DS:
5403 case R_PPC64_DTPREL16_HIGH:
5404 case R_PPC64_DTPREL16_HIGHA:
5405 case R_PPC64_DTPREL16_HIGHER:
5406 case R_PPC64_DTPREL16_HIGHERA:
5407 case R_PPC64_DTPREL16_HIGHEST:
5408 case R_PPC64_DTPREL16_HIGHESTA:
5409 break;
5410
5411 /* Nor do these. */
5412 case R_PPC64_REL16:
5413 case R_PPC64_REL16_LO:
5414 case R_PPC64_REL16_HI:
5415 case R_PPC64_REL16_HA:
5416 break;
5417
5418 /* Not supported as a dynamic relocation. */
5419 case R_PPC64_ADDR64_LOCAL:
5420 if (info->shared)
5421 {
5422 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5423 ppc_howto_init ();
5424 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5425 "in shared libraries and PIEs.\n"),
5426 abfd, sec, rel->r_offset,
5427 ppc64_elf_howto_table[r_type]->name);
5428 bfd_set_error (bfd_error_bad_value);
5429 return FALSE;
5430 }
5431 break;
5432
5433 case R_PPC64_TOC16:
5434 case R_PPC64_TOC16_DS:
5435 htab->do_multi_toc = 1;
5436 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5437 case R_PPC64_TOC16_LO:
5438 case R_PPC64_TOC16_HI:
5439 case R_PPC64_TOC16_HA:
5440 case R_PPC64_TOC16_LO_DS:
5441 sec->has_toc_reloc = 1;
5442 break;
5443
5444 /* This relocation describes the C++ object vtable hierarchy.
5445 Reconstruct it for later use during GC. */
5446 case R_PPC64_GNU_VTINHERIT:
5447 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5448 return FALSE;
5449 break;
5450
5451 /* This relocation describes which C++ vtable entries are actually
5452 used. Record for later use during GC. */
5453 case R_PPC64_GNU_VTENTRY:
5454 BFD_ASSERT (h != NULL);
5455 if (h != NULL
5456 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5457 return FALSE;
5458 break;
5459
5460 case R_PPC64_REL14:
5461 case R_PPC64_REL14_BRTAKEN:
5462 case R_PPC64_REL14_BRNTAKEN:
5463 {
5464 asection *dest = NULL;
5465
5466 /* Heuristic: If jumping outside our section, chances are
5467 we are going to need a stub. */
5468 if (h != NULL)
5469 {
5470 /* If the sym is weak it may be overridden later, so
5471 don't assume we know where a weak sym lives. */
5472 if (h->root.type == bfd_link_hash_defined)
5473 dest = h->root.u.def.section;
5474 }
5475 else
5476 {
5477 Elf_Internal_Sym *isym;
5478
5479 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5480 abfd, r_symndx);
5481 if (isym == NULL)
5482 return FALSE;
5483
5484 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5485 }
5486
5487 if (dest != sec)
5488 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5489 }
5490 /* Fall through. */
5491
5492 case R_PPC64_REL24:
5493 if (h != NULL && ifunc == NULL)
5494 {
5495 /* We may need a .plt entry if the function this reloc
5496 refers to is in a shared lib. */
5497 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5498 return FALSE;
5499 h->needs_plt = 1;
5500 if (h->root.root.string[0] == '.'
5501 && h->root.root.string[1] != '\0')
5502 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5503 if (h == tga || h == dottga)
5504 sec->has_tls_reloc = 1;
5505 }
5506 break;
5507
5508 case R_PPC64_TPREL64:
5509 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5510 if (!info->executable)
5511 info->flags |= DF_STATIC_TLS;
5512 goto dotlstoc;
5513
5514 case R_PPC64_DTPMOD64:
5515 if (rel + 1 < rel_end
5516 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5517 && rel[1].r_offset == rel->r_offset + 8)
5518 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5519 else
5520 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5521 goto dotlstoc;
5522
5523 case R_PPC64_DTPREL64:
5524 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5525 if (rel != relocs
5526 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5527 && rel[-1].r_offset == rel->r_offset - 8)
5528 /* This is the second reloc of a dtpmod, dtprel pair.
5529 Don't mark with TLS_DTPREL. */
5530 goto dodyn;
5531
5532 dotlstoc:
5533 sec->has_tls_reloc = 1;
5534 if (h != NULL)
5535 {
5536 struct ppc_link_hash_entry *eh;
5537 eh = (struct ppc_link_hash_entry *) h;
5538 eh->tls_mask |= tls_type;
5539 }
5540 else
5541 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5542 rel->r_addend, tls_type))
5543 return FALSE;
5544
5545 ppc64_sec = ppc64_elf_section_data (sec);
5546 if (ppc64_sec->sec_type != sec_toc)
5547 {
5548 bfd_size_type amt;
5549
5550 /* One extra to simplify get_tls_mask. */
5551 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5552 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5553 if (ppc64_sec->u.toc.symndx == NULL)
5554 return FALSE;
5555 amt = sec->size * sizeof (bfd_vma) / 8;
5556 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5557 if (ppc64_sec->u.toc.add == NULL)
5558 return FALSE;
5559 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5560 ppc64_sec->sec_type = sec_toc;
5561 }
5562 BFD_ASSERT (rel->r_offset % 8 == 0);
5563 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5564 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5565
5566 /* Mark the second slot of a GD or LD entry.
5567 -1 to indicate GD and -2 to indicate LD. */
5568 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5569 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5570 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5571 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5572 goto dodyn;
5573
5574 case R_PPC64_TPREL16:
5575 case R_PPC64_TPREL16_LO:
5576 case R_PPC64_TPREL16_HI:
5577 case R_PPC64_TPREL16_HA:
5578 case R_PPC64_TPREL16_DS:
5579 case R_PPC64_TPREL16_LO_DS:
5580 case R_PPC64_TPREL16_HIGH:
5581 case R_PPC64_TPREL16_HIGHA:
5582 case R_PPC64_TPREL16_HIGHER:
5583 case R_PPC64_TPREL16_HIGHERA:
5584 case R_PPC64_TPREL16_HIGHEST:
5585 case R_PPC64_TPREL16_HIGHESTA:
5586 if (info->shared)
5587 {
5588 if (!info->executable)
5589 info->flags |= DF_STATIC_TLS;
5590 goto dodyn;
5591 }
5592 break;
5593
5594 case R_PPC64_ADDR64:
5595 if (opd_sym_map != NULL
5596 && rel + 1 < rel_end
5597 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5598 {
5599 if (h != NULL)
5600 {
5601 if (h->root.root.string[0] == '.'
5602 && h->root.root.string[1] != 0
5603 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5604 ;
5605 else
5606 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5607 }
5608 else
5609 {
5610 asection *s;
5611 Elf_Internal_Sym *isym;
5612
5613 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5614 abfd, r_symndx);
5615 if (isym == NULL)
5616 return FALSE;
5617
5618 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5619 if (s != NULL && s != sec)
5620 opd_sym_map[rel->r_offset / 8] = s;
5621 }
5622 }
5623 /* Fall through. */
5624
5625 case R_PPC64_ADDR16:
5626 case R_PPC64_ADDR16_DS:
5627 case R_PPC64_ADDR16_HA:
5628 case R_PPC64_ADDR16_HI:
5629 case R_PPC64_ADDR16_HIGH:
5630 case R_PPC64_ADDR16_HIGHA:
5631 case R_PPC64_ADDR16_HIGHER:
5632 case R_PPC64_ADDR16_HIGHERA:
5633 case R_PPC64_ADDR16_HIGHEST:
5634 case R_PPC64_ADDR16_HIGHESTA:
5635 case R_PPC64_ADDR16_LO:
5636 case R_PPC64_ADDR16_LO_DS:
5637 if (h != NULL && !info->shared && abiversion (abfd) == 2
5638 && rel->r_addend == 0)
5639 {
5640 /* We may need a .plt entry if this reloc refers to a
5641 function in a shared lib. */
5642 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5643 return FALSE;
5644 h->pointer_equality_needed = 1;
5645 }
5646 /* Fall through. */
5647
5648 case R_PPC64_REL30:
5649 case R_PPC64_REL32:
5650 case R_PPC64_REL64:
5651 case R_PPC64_ADDR14:
5652 case R_PPC64_ADDR14_BRNTAKEN:
5653 case R_PPC64_ADDR14_BRTAKEN:
5654 case R_PPC64_ADDR24:
5655 case R_PPC64_ADDR32:
5656 case R_PPC64_UADDR16:
5657 case R_PPC64_UADDR32:
5658 case R_PPC64_UADDR64:
5659 case R_PPC64_TOC:
5660 if (h != NULL && !info->shared)
5661 /* We may need a copy reloc. */
5662 h->non_got_ref = 1;
5663
5664 /* Don't propagate .opd relocs. */
5665 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5666 break;
5667
5668 /* If we are creating a shared library, and this is a reloc
5669 against a global symbol, or a non PC relative reloc
5670 against a local symbol, then we need to copy the reloc
5671 into the shared library. However, if we are linking with
5672 -Bsymbolic, we do not need to copy a reloc against a
5673 global symbol which is defined in an object we are
5674 including in the link (i.e., DEF_REGULAR is set). At
5675 this point we have not seen all the input files, so it is
5676 possible that DEF_REGULAR is not set now but will be set
5677 later (it is never cleared). In case of a weak definition,
5678 DEF_REGULAR may be cleared later by a strong definition in
5679 a shared library. We account for that possibility below by
5680 storing information in the dyn_relocs field of the hash
5681 table entry. A similar situation occurs when creating
5682 shared libraries and symbol visibility changes render the
5683 symbol local.
5684
5685 If on the other hand, we are creating an executable, we
5686 may need to keep relocations for symbols satisfied by a
5687 dynamic library if we manage to avoid copy relocs for the
5688 symbol. */
5689 dodyn:
5690 if ((info->shared
5691 && (must_be_dyn_reloc (info, r_type)
5692 || (h != NULL
5693 && (!SYMBOLIC_BIND (info, h)
5694 || h->root.type == bfd_link_hash_defweak
5695 || !h->def_regular))))
5696 || (ELIMINATE_COPY_RELOCS
5697 && !info->shared
5698 && h != NULL
5699 && (h->root.type == bfd_link_hash_defweak
5700 || !h->def_regular))
5701 || (!info->shared
5702 && ifunc != NULL))
5703 {
5704 /* We must copy these reloc types into the output file.
5705 Create a reloc section in dynobj and make room for
5706 this reloc. */
5707 if (sreloc == NULL)
5708 {
5709 sreloc = _bfd_elf_make_dynamic_reloc_section
5710 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5711
5712 if (sreloc == NULL)
5713 return FALSE;
5714 }
5715
5716 /* If this is a global symbol, we count the number of
5717 relocations we need for this symbol. */
5718 if (h != NULL)
5719 {
5720 struct elf_dyn_relocs *p;
5721 struct elf_dyn_relocs **head;
5722
5723 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5724 p = *head;
5725 if (p == NULL || p->sec != sec)
5726 {
5727 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5728 if (p == NULL)
5729 return FALSE;
5730 p->next = *head;
5731 *head = p;
5732 p->sec = sec;
5733 p->count = 0;
5734 p->pc_count = 0;
5735 }
5736 p->count += 1;
5737 if (!must_be_dyn_reloc (info, r_type))
5738 p->pc_count += 1;
5739 }
5740 else
5741 {
5742 /* Track dynamic relocs needed for local syms too.
5743 We really need local syms available to do this
5744 easily. Oh well. */
5745 struct ppc_dyn_relocs *p;
5746 struct ppc_dyn_relocs **head;
5747 bfd_boolean is_ifunc;
5748 asection *s;
5749 void *vpp;
5750 Elf_Internal_Sym *isym;
5751
5752 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5753 abfd, r_symndx);
5754 if (isym == NULL)
5755 return FALSE;
5756
5757 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5758 if (s == NULL)
5759 s = sec;
5760
5761 vpp = &elf_section_data (s)->local_dynrel;
5762 head = (struct ppc_dyn_relocs **) vpp;
5763 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5764 p = *head;
5765 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5766 p = p->next;
5767 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5768 {
5769 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5770 if (p == NULL)
5771 return FALSE;
5772 p->next = *head;
5773 *head = p;
5774 p->sec = sec;
5775 p->ifunc = is_ifunc;
5776 p->count = 0;
5777 }
5778 p->count += 1;
5779 }
5780 }
5781 break;
5782
5783 default:
5784 break;
5785 }
5786 }
5787
5788 return TRUE;
5789 }
5790
5791 /* Merge backend specific data from an object file to the output
5792 object file when linking. */
5793
5794 static bfd_boolean
5795 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5796 {
5797 unsigned long iflags, oflags;
5798
5799 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5800 return TRUE;
5801
5802 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5803 return TRUE;
5804
5805 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5806 return FALSE;
5807
5808 iflags = elf_elfheader (ibfd)->e_flags;
5809 oflags = elf_elfheader (obfd)->e_flags;
5810
5811 if (!elf_flags_init (obfd) || oflags == 0)
5812 {
5813 elf_flags_init (obfd) = TRUE;
5814 elf_elfheader (obfd)->e_flags = iflags;
5815 }
5816 else if (iflags == oflags || iflags == 0)
5817 ;
5818 else if (iflags & ~EF_PPC64_ABI)
5819 {
5820 (*_bfd_error_handler)
5821 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5822 bfd_set_error (bfd_error_bad_value);
5823 return FALSE;
5824 }
5825 else
5826 {
5827 (*_bfd_error_handler)
5828 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5829 ibfd, iflags, oflags);
5830 bfd_set_error (bfd_error_bad_value);
5831 return FALSE;
5832 }
5833
5834 /* Merge Tag_compatibility attributes and any common GNU ones. */
5835 _bfd_elf_merge_object_attributes (ibfd, obfd);
5836
5837 return TRUE;
5838 }
5839
5840 static bfd_boolean
5841 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5842 {
5843 /* Print normal ELF private data. */
5844 _bfd_elf_print_private_bfd_data (abfd, ptr);
5845
5846 if (elf_elfheader (abfd)->e_flags != 0)
5847 {
5848 FILE *file = ptr;
5849
5850 /* xgettext:c-format */
5851 fprintf (file, _("private flags = 0x%lx:"),
5852 elf_elfheader (abfd)->e_flags);
5853
5854 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
5855 fprintf (file, _(" [abiv%ld]"),
5856 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
5857 fputc ('\n', file);
5858 }
5859
5860 return TRUE;
5861 }
5862
5863 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5864 of the code entry point, and its section. */
5865
5866 static bfd_vma
5867 opd_entry_value (asection *opd_sec,
5868 bfd_vma offset,
5869 asection **code_sec,
5870 bfd_vma *code_off,
5871 bfd_boolean in_code_sec)
5872 {
5873 bfd *opd_bfd = opd_sec->owner;
5874 Elf_Internal_Rela *relocs;
5875 Elf_Internal_Rela *lo, *hi, *look;
5876 bfd_vma val;
5877
5878 /* No relocs implies we are linking a --just-symbols object, or looking
5879 at a final linked executable with addr2line or somesuch. */
5880 if (opd_sec->reloc_count == 0)
5881 {
5882 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
5883
5884 if (contents == NULL)
5885 {
5886 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
5887 return (bfd_vma) -1;
5888 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
5889 }
5890
5891 val = bfd_get_64 (opd_bfd, contents + offset);
5892 if (code_sec != NULL)
5893 {
5894 asection *sec, *likely = NULL;
5895
5896 if (in_code_sec)
5897 {
5898 sec = *code_sec;
5899 if (sec->vma <= val
5900 && val < sec->vma + sec->size)
5901 likely = sec;
5902 else
5903 val = -1;
5904 }
5905 else
5906 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5907 if (sec->vma <= val
5908 && (sec->flags & SEC_LOAD) != 0
5909 && (sec->flags & SEC_ALLOC) != 0)
5910 likely = sec;
5911 if (likely != NULL)
5912 {
5913 *code_sec = likely;
5914 if (code_off != NULL)
5915 *code_off = val - likely->vma;
5916 }
5917 }
5918 return val;
5919 }
5920
5921 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5922
5923 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5924 if (relocs == NULL)
5925 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5926
5927 /* Go find the opd reloc at the sym address. */
5928 lo = relocs;
5929 BFD_ASSERT (lo != NULL);
5930 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5931 val = (bfd_vma) -1;
5932 while (lo < hi)
5933 {
5934 look = lo + (hi - lo) / 2;
5935 if (look->r_offset < offset)
5936 lo = look + 1;
5937 else if (look->r_offset > offset)
5938 hi = look;
5939 else
5940 {
5941 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5942
5943 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5944 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5945 {
5946 unsigned long symndx = ELF64_R_SYM (look->r_info);
5947 asection *sec;
5948
5949 if (symndx < symtab_hdr->sh_info
5950 || elf_sym_hashes (opd_bfd) == NULL)
5951 {
5952 Elf_Internal_Sym *sym;
5953
5954 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5955 if (sym == NULL)
5956 {
5957 size_t symcnt = symtab_hdr->sh_info;
5958 if (elf_sym_hashes (opd_bfd) == NULL)
5959 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5960 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5961 0, NULL, NULL, NULL);
5962 if (sym == NULL)
5963 break;
5964 symtab_hdr->contents = (bfd_byte *) sym;
5965 }
5966
5967 sym += symndx;
5968 val = sym->st_value;
5969 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5970 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5971 }
5972 else
5973 {
5974 struct elf_link_hash_entry **sym_hashes;
5975 struct elf_link_hash_entry *rh;
5976
5977 sym_hashes = elf_sym_hashes (opd_bfd);
5978 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5979 if (rh != NULL)
5980 {
5981 rh = elf_follow_link (rh);
5982 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5983 || rh->root.type == bfd_link_hash_defweak);
5984 val = rh->root.u.def.value;
5985 sec = rh->root.u.def.section;
5986 }
5987 else
5988 {
5989 /* Handle the odd case where we can be called
5990 during bfd_elf_link_add_symbols before the
5991 symbol hashes have been fully populated. */
5992 Elf_Internal_Sym *sym;
5993
5994 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
5995 symndx, NULL, NULL, NULL);
5996 if (sym == NULL)
5997 break;
5998
5999 val = sym->st_value;
6000 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6001 free (sym);
6002 }
6003 }
6004 val += look->r_addend;
6005 if (code_off != NULL)
6006 *code_off = val;
6007 if (code_sec != NULL)
6008 {
6009 if (in_code_sec && *code_sec != sec)
6010 return -1;
6011 else
6012 *code_sec = sec;
6013 }
6014 if (sec != NULL && sec->output_section != NULL)
6015 val += sec->output_section->vma + sec->output_offset;
6016 }
6017 break;
6018 }
6019 }
6020
6021 return val;
6022 }
6023
6024 /* If the ELF symbol SYM might be a function in SEC, return the
6025 function size and set *CODE_OFF to the function's entry point,
6026 otherwise return zero. */
6027
6028 static bfd_size_type
6029 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6030 bfd_vma *code_off)
6031 {
6032 bfd_size_type size;
6033
6034 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6035 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6036 return 0;
6037
6038 size = 0;
6039 if (!(sym->flags & BSF_SYNTHETIC))
6040 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6041
6042 if (strcmp (sym->section->name, ".opd") == 0)
6043 {
6044 if (opd_entry_value (sym->section, sym->value,
6045 &sec, code_off, TRUE) == (bfd_vma) -1)
6046 return 0;
6047 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6048 symbol. This size has nothing to do with the code size of the
6049 function, which is what we're supposed to return, but the
6050 code size isn't available without looking up the dot-sym.
6051 However, doing that would be a waste of time particularly
6052 since elf_find_function will look at the dot-sym anyway.
6053 Now, elf_find_function will keep the largest size of any
6054 function sym found at the code address of interest, so return
6055 1 here to avoid it incorrectly caching a larger function size
6056 for a small function. This does mean we return the wrong
6057 size for a new-ABI function of size 24, but all that does is
6058 disable caching for such functions. */
6059 if (size == 24)
6060 size = 1;
6061 }
6062 else
6063 {
6064 if (sym->section != sec)
6065 return 0;
6066 *code_off = sym->value;
6067 }
6068 if (size == 0)
6069 size = 1;
6070 return size;
6071 }
6072
6073 /* Return true if symbol is defined in a regular object file. */
6074
6075 static bfd_boolean
6076 is_static_defined (struct elf_link_hash_entry *h)
6077 {
6078 return ((h->root.type == bfd_link_hash_defined
6079 || h->root.type == bfd_link_hash_defweak)
6080 && h->root.u.def.section != NULL
6081 && h->root.u.def.section->output_section != NULL);
6082 }
6083
6084 /* If FDH is a function descriptor symbol, return the associated code
6085 entry symbol if it is defined. Return NULL otherwise. */
6086
6087 static struct ppc_link_hash_entry *
6088 defined_code_entry (struct ppc_link_hash_entry *fdh)
6089 {
6090 if (fdh->is_func_descriptor)
6091 {
6092 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6093 if (fh->elf.root.type == bfd_link_hash_defined
6094 || fh->elf.root.type == bfd_link_hash_defweak)
6095 return fh;
6096 }
6097 return NULL;
6098 }
6099
6100 /* If FH is a function code entry symbol, return the associated
6101 function descriptor symbol if it is defined. Return NULL otherwise. */
6102
6103 static struct ppc_link_hash_entry *
6104 defined_func_desc (struct ppc_link_hash_entry *fh)
6105 {
6106 if (fh->oh != NULL
6107 && fh->oh->is_func_descriptor)
6108 {
6109 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6110 if (fdh->elf.root.type == bfd_link_hash_defined
6111 || fdh->elf.root.type == bfd_link_hash_defweak)
6112 return fdh;
6113 }
6114 return NULL;
6115 }
6116
6117 /* Mark all our entry sym sections, both opd and code section. */
6118
6119 static void
6120 ppc64_elf_gc_keep (struct bfd_link_info *info)
6121 {
6122 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6123 struct bfd_sym_chain *sym;
6124
6125 if (htab == NULL)
6126 return;
6127
6128 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6129 {
6130 struct ppc_link_hash_entry *eh, *fh;
6131 asection *sec;
6132
6133 eh = (struct ppc_link_hash_entry *)
6134 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6135 if (eh == NULL)
6136 continue;
6137 if (eh->elf.root.type != bfd_link_hash_defined
6138 && eh->elf.root.type != bfd_link_hash_defweak)
6139 continue;
6140
6141 fh = defined_code_entry (eh);
6142 if (fh != NULL)
6143 {
6144 sec = fh->elf.root.u.def.section;
6145 sec->flags |= SEC_KEEP;
6146 }
6147 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6148 && opd_entry_value (eh->elf.root.u.def.section,
6149 eh->elf.root.u.def.value,
6150 &sec, NULL, FALSE) != (bfd_vma) -1)
6151 sec->flags |= SEC_KEEP;
6152
6153 sec = eh->elf.root.u.def.section;
6154 sec->flags |= SEC_KEEP;
6155 }
6156 }
6157
6158 /* Mark sections containing dynamically referenced symbols. When
6159 building shared libraries, we must assume that any visible symbol is
6160 referenced. */
6161
6162 static bfd_boolean
6163 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6164 {
6165 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6166 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6167 struct ppc_link_hash_entry *fdh;
6168 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6169
6170 /* Dynamic linking info is on the func descriptor sym. */
6171 fdh = defined_func_desc (eh);
6172 if (fdh != NULL)
6173 eh = fdh;
6174
6175 if ((eh->elf.root.type == bfd_link_hash_defined
6176 || eh->elf.root.type == bfd_link_hash_defweak)
6177 && (eh->elf.ref_dynamic
6178 || (eh->elf.def_regular
6179 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6180 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6181 && (!info->executable
6182 || info->export_dynamic
6183 || (eh->elf.dynamic
6184 && d != NULL
6185 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6186 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6187 || !bfd_hide_sym_by_version (info->version_info,
6188 eh->elf.root.root.string)))))
6189 {
6190 asection *code_sec;
6191 struct ppc_link_hash_entry *fh;
6192
6193 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6194
6195 /* Function descriptor syms cause the associated
6196 function code sym section to be marked. */
6197 fh = defined_code_entry (eh);
6198 if (fh != NULL)
6199 {
6200 code_sec = fh->elf.root.u.def.section;
6201 code_sec->flags |= SEC_KEEP;
6202 }
6203 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6204 && opd_entry_value (eh->elf.root.u.def.section,
6205 eh->elf.root.u.def.value,
6206 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6207 code_sec->flags |= SEC_KEEP;
6208 }
6209
6210 return TRUE;
6211 }
6212
6213 /* Return the section that should be marked against GC for a given
6214 relocation. */
6215
6216 static asection *
6217 ppc64_elf_gc_mark_hook (asection *sec,
6218 struct bfd_link_info *info,
6219 Elf_Internal_Rela *rel,
6220 struct elf_link_hash_entry *h,
6221 Elf_Internal_Sym *sym)
6222 {
6223 asection *rsec;
6224
6225 /* Syms return NULL if we're marking .opd, so we avoid marking all
6226 function sections, as all functions are referenced in .opd. */
6227 rsec = NULL;
6228 if (get_opd_info (sec) != NULL)
6229 return rsec;
6230
6231 if (h != NULL)
6232 {
6233 enum elf_ppc64_reloc_type r_type;
6234 struct ppc_link_hash_entry *eh, *fh, *fdh;
6235
6236 r_type = ELF64_R_TYPE (rel->r_info);
6237 switch (r_type)
6238 {
6239 case R_PPC64_GNU_VTINHERIT:
6240 case R_PPC64_GNU_VTENTRY:
6241 break;
6242
6243 default:
6244 switch (h->root.type)
6245 {
6246 case bfd_link_hash_defined:
6247 case bfd_link_hash_defweak:
6248 eh = (struct ppc_link_hash_entry *) h;
6249 fdh = defined_func_desc (eh);
6250 if (fdh != NULL)
6251 eh = fdh;
6252
6253 /* Function descriptor syms cause the associated
6254 function code sym section to be marked. */
6255 fh = defined_code_entry (eh);
6256 if (fh != NULL)
6257 {
6258 /* They also mark their opd section. */
6259 eh->elf.root.u.def.section->gc_mark = 1;
6260
6261 rsec = fh->elf.root.u.def.section;
6262 }
6263 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6264 && opd_entry_value (eh->elf.root.u.def.section,
6265 eh->elf.root.u.def.value,
6266 &rsec, NULL, FALSE) != (bfd_vma) -1)
6267 eh->elf.root.u.def.section->gc_mark = 1;
6268 else
6269 rsec = h->root.u.def.section;
6270 break;
6271
6272 case bfd_link_hash_common:
6273 rsec = h->root.u.c.p->section;
6274 break;
6275
6276 default:
6277 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6278 }
6279 }
6280 }
6281 else
6282 {
6283 struct _opd_sec_data *opd;
6284
6285 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6286 opd = get_opd_info (rsec);
6287 if (opd != NULL && opd->func_sec != NULL)
6288 {
6289 rsec->gc_mark = 1;
6290
6291 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
6292 }
6293 }
6294
6295 return rsec;
6296 }
6297
6298 /* Update the .got, .plt. and dynamic reloc reference counts for the
6299 section being removed. */
6300
6301 static bfd_boolean
6302 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6303 asection *sec, const Elf_Internal_Rela *relocs)
6304 {
6305 struct ppc_link_hash_table *htab;
6306 Elf_Internal_Shdr *symtab_hdr;
6307 struct elf_link_hash_entry **sym_hashes;
6308 struct got_entry **local_got_ents;
6309 const Elf_Internal_Rela *rel, *relend;
6310
6311 if (info->relocatable)
6312 return TRUE;
6313
6314 if ((sec->flags & SEC_ALLOC) == 0)
6315 return TRUE;
6316
6317 elf_section_data (sec)->local_dynrel = NULL;
6318
6319 htab = ppc_hash_table (info);
6320 if (htab == NULL)
6321 return FALSE;
6322
6323 symtab_hdr = &elf_symtab_hdr (abfd);
6324 sym_hashes = elf_sym_hashes (abfd);
6325 local_got_ents = elf_local_got_ents (abfd);
6326
6327 relend = relocs + sec->reloc_count;
6328 for (rel = relocs; rel < relend; rel++)
6329 {
6330 unsigned long r_symndx;
6331 enum elf_ppc64_reloc_type r_type;
6332 struct elf_link_hash_entry *h = NULL;
6333 unsigned char tls_type = 0;
6334
6335 r_symndx = ELF64_R_SYM (rel->r_info);
6336 r_type = ELF64_R_TYPE (rel->r_info);
6337 if (r_symndx >= symtab_hdr->sh_info)
6338 {
6339 struct ppc_link_hash_entry *eh;
6340 struct elf_dyn_relocs **pp;
6341 struct elf_dyn_relocs *p;
6342
6343 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6344 h = elf_follow_link (h);
6345 eh = (struct ppc_link_hash_entry *) h;
6346
6347 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6348 if (p->sec == sec)
6349 {
6350 /* Everything must go for SEC. */
6351 *pp = p->next;
6352 break;
6353 }
6354 }
6355
6356 if (is_branch_reloc (r_type))
6357 {
6358 struct plt_entry **ifunc = NULL;
6359 if (h != NULL)
6360 {
6361 if (h->type == STT_GNU_IFUNC)
6362 ifunc = &h->plt.plist;
6363 }
6364 else if (local_got_ents != NULL)
6365 {
6366 struct plt_entry **local_plt = (struct plt_entry **)
6367 (local_got_ents + symtab_hdr->sh_info);
6368 unsigned char *local_got_tls_masks = (unsigned char *)
6369 (local_plt + symtab_hdr->sh_info);
6370 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6371 ifunc = local_plt + r_symndx;
6372 }
6373 if (ifunc != NULL)
6374 {
6375 struct plt_entry *ent;
6376
6377 for (ent = *ifunc; ent != NULL; ent = ent->next)
6378 if (ent->addend == rel->r_addend)
6379 break;
6380 if (ent == NULL)
6381 abort ();
6382 if (ent->plt.refcount > 0)
6383 ent->plt.refcount -= 1;
6384 continue;
6385 }
6386 }
6387
6388 switch (r_type)
6389 {
6390 case R_PPC64_GOT_TLSLD16:
6391 case R_PPC64_GOT_TLSLD16_LO:
6392 case R_PPC64_GOT_TLSLD16_HI:
6393 case R_PPC64_GOT_TLSLD16_HA:
6394 tls_type = TLS_TLS | TLS_LD;
6395 goto dogot;
6396
6397 case R_PPC64_GOT_TLSGD16:
6398 case R_PPC64_GOT_TLSGD16_LO:
6399 case R_PPC64_GOT_TLSGD16_HI:
6400 case R_PPC64_GOT_TLSGD16_HA:
6401 tls_type = TLS_TLS | TLS_GD;
6402 goto dogot;
6403
6404 case R_PPC64_GOT_TPREL16_DS:
6405 case R_PPC64_GOT_TPREL16_LO_DS:
6406 case R_PPC64_GOT_TPREL16_HI:
6407 case R_PPC64_GOT_TPREL16_HA:
6408 tls_type = TLS_TLS | TLS_TPREL;
6409 goto dogot;
6410
6411 case R_PPC64_GOT_DTPREL16_DS:
6412 case R_PPC64_GOT_DTPREL16_LO_DS:
6413 case R_PPC64_GOT_DTPREL16_HI:
6414 case R_PPC64_GOT_DTPREL16_HA:
6415 tls_type = TLS_TLS | TLS_DTPREL;
6416 goto dogot;
6417
6418 case R_PPC64_GOT16:
6419 case R_PPC64_GOT16_DS:
6420 case R_PPC64_GOT16_HA:
6421 case R_PPC64_GOT16_HI:
6422 case R_PPC64_GOT16_LO:
6423 case R_PPC64_GOT16_LO_DS:
6424 dogot:
6425 {
6426 struct got_entry *ent;
6427
6428 if (h != NULL)
6429 ent = h->got.glist;
6430 else
6431 ent = local_got_ents[r_symndx];
6432
6433 for (; ent != NULL; ent = ent->next)
6434 if (ent->addend == rel->r_addend
6435 && ent->owner == abfd
6436 && ent->tls_type == tls_type)
6437 break;
6438 if (ent == NULL)
6439 abort ();
6440 if (ent->got.refcount > 0)
6441 ent->got.refcount -= 1;
6442 }
6443 break;
6444
6445 case R_PPC64_PLT16_HA:
6446 case R_PPC64_PLT16_HI:
6447 case R_PPC64_PLT16_LO:
6448 case R_PPC64_PLT32:
6449 case R_PPC64_PLT64:
6450 case R_PPC64_REL14:
6451 case R_PPC64_REL14_BRNTAKEN:
6452 case R_PPC64_REL14_BRTAKEN:
6453 case R_PPC64_REL24:
6454 if (h != NULL)
6455 {
6456 struct plt_entry *ent;
6457
6458 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6459 if (ent->addend == rel->r_addend)
6460 break;
6461 if (ent != NULL && ent->plt.refcount > 0)
6462 ent->plt.refcount -= 1;
6463 }
6464 break;
6465
6466 default:
6467 break;
6468 }
6469 }
6470 return TRUE;
6471 }
6472
6473 /* The maximum size of .sfpr. */
6474 #define SFPR_MAX (218*4)
6475
6476 struct sfpr_def_parms
6477 {
6478 const char name[12];
6479 unsigned char lo, hi;
6480 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6481 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6482 };
6483
6484 /* Auto-generate _save*, _rest* functions in .sfpr. */
6485
6486 static bfd_boolean
6487 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6488 {
6489 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6490 unsigned int i;
6491 size_t len = strlen (parm->name);
6492 bfd_boolean writing = FALSE;
6493 char sym[16];
6494
6495 if (htab == NULL)
6496 return FALSE;
6497
6498 memcpy (sym, parm->name, len);
6499 sym[len + 2] = 0;
6500
6501 for (i = parm->lo; i <= parm->hi; i++)
6502 {
6503 struct elf_link_hash_entry *h;
6504
6505 sym[len + 0] = i / 10 + '0';
6506 sym[len + 1] = i % 10 + '0';
6507 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6508 if (h != NULL
6509 && !h->def_regular)
6510 {
6511 h->root.type = bfd_link_hash_defined;
6512 h->root.u.def.section = htab->sfpr;
6513 h->root.u.def.value = htab->sfpr->size;
6514 h->type = STT_FUNC;
6515 h->def_regular = 1;
6516 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6517 writing = TRUE;
6518 if (htab->sfpr->contents == NULL)
6519 {
6520 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6521 if (htab->sfpr->contents == NULL)
6522 return FALSE;
6523 }
6524 }
6525 if (writing)
6526 {
6527 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6528 if (i != parm->hi)
6529 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6530 else
6531 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6532 htab->sfpr->size = p - htab->sfpr->contents;
6533 }
6534 }
6535
6536 return TRUE;
6537 }
6538
6539 static bfd_byte *
6540 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6541 {
6542 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6543 return p + 4;
6544 }
6545
6546 static bfd_byte *
6547 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6548 {
6549 p = savegpr0 (abfd, p, r);
6550 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6551 p = p + 4;
6552 bfd_put_32 (abfd, BLR, p);
6553 return p + 4;
6554 }
6555
6556 static bfd_byte *
6557 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6558 {
6559 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6560 return p + 4;
6561 }
6562
6563 static bfd_byte *
6564 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6565 {
6566 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6567 p = p + 4;
6568 p = restgpr0 (abfd, p, r);
6569 bfd_put_32 (abfd, MTLR_R0, p);
6570 p = p + 4;
6571 if (r == 29)
6572 {
6573 p = restgpr0 (abfd, p, 30);
6574 p = restgpr0 (abfd, p, 31);
6575 }
6576 bfd_put_32 (abfd, BLR, p);
6577 return p + 4;
6578 }
6579
6580 static bfd_byte *
6581 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6582 {
6583 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6584 return p + 4;
6585 }
6586
6587 static bfd_byte *
6588 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6589 {
6590 p = savegpr1 (abfd, p, r);
6591 bfd_put_32 (abfd, BLR, p);
6592 return p + 4;
6593 }
6594
6595 static bfd_byte *
6596 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6597 {
6598 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6599 return p + 4;
6600 }
6601
6602 static bfd_byte *
6603 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6604 {
6605 p = restgpr1 (abfd, p, r);
6606 bfd_put_32 (abfd, BLR, p);
6607 return p + 4;
6608 }
6609
6610 static bfd_byte *
6611 savefpr (bfd *abfd, bfd_byte *p, int r)
6612 {
6613 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6614 return p + 4;
6615 }
6616
6617 static bfd_byte *
6618 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6619 {
6620 p = savefpr (abfd, p, r);
6621 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6622 p = p + 4;
6623 bfd_put_32 (abfd, BLR, p);
6624 return p + 4;
6625 }
6626
6627 static bfd_byte *
6628 restfpr (bfd *abfd, bfd_byte *p, int r)
6629 {
6630 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6631 return p + 4;
6632 }
6633
6634 static bfd_byte *
6635 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6636 {
6637 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6638 p = p + 4;
6639 p = restfpr (abfd, p, r);
6640 bfd_put_32 (abfd, MTLR_R0, p);
6641 p = p + 4;
6642 if (r == 29)
6643 {
6644 p = restfpr (abfd, p, 30);
6645 p = restfpr (abfd, p, 31);
6646 }
6647 bfd_put_32 (abfd, BLR, p);
6648 return p + 4;
6649 }
6650
6651 static bfd_byte *
6652 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6653 {
6654 p = savefpr (abfd, p, r);
6655 bfd_put_32 (abfd, BLR, p);
6656 return p + 4;
6657 }
6658
6659 static bfd_byte *
6660 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6661 {
6662 p = restfpr (abfd, p, r);
6663 bfd_put_32 (abfd, BLR, p);
6664 return p + 4;
6665 }
6666
6667 static bfd_byte *
6668 savevr (bfd *abfd, bfd_byte *p, int r)
6669 {
6670 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6671 p = p + 4;
6672 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6673 return p + 4;
6674 }
6675
6676 static bfd_byte *
6677 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6678 {
6679 p = savevr (abfd, p, r);
6680 bfd_put_32 (abfd, BLR, p);
6681 return p + 4;
6682 }
6683
6684 static bfd_byte *
6685 restvr (bfd *abfd, bfd_byte *p, int r)
6686 {
6687 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6688 p = p + 4;
6689 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6690 return p + 4;
6691 }
6692
6693 static bfd_byte *
6694 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6695 {
6696 p = restvr (abfd, p, r);
6697 bfd_put_32 (abfd, BLR, p);
6698 return p + 4;
6699 }
6700
6701 /* Called via elf_link_hash_traverse to transfer dynamic linking
6702 information on function code symbol entries to their corresponding
6703 function descriptor symbol entries. */
6704
6705 static bfd_boolean
6706 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6707 {
6708 struct bfd_link_info *info;
6709 struct ppc_link_hash_table *htab;
6710 struct plt_entry *ent;
6711 struct ppc_link_hash_entry *fh;
6712 struct ppc_link_hash_entry *fdh;
6713 bfd_boolean force_local;
6714
6715 fh = (struct ppc_link_hash_entry *) h;
6716 if (fh->elf.root.type == bfd_link_hash_indirect)
6717 return TRUE;
6718
6719 info = inf;
6720 htab = ppc_hash_table (info);
6721 if (htab == NULL)
6722 return FALSE;
6723
6724 /* Resolve undefined references to dot-symbols as the value
6725 in the function descriptor, if we have one in a regular object.
6726 This is to satisfy cases like ".quad .foo". Calls to functions
6727 in dynamic objects are handled elsewhere. */
6728 if (fh->elf.root.type == bfd_link_hash_undefweak
6729 && fh->was_undefined
6730 && (fdh = defined_func_desc (fh)) != NULL
6731 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6732 && opd_entry_value (fdh->elf.root.u.def.section,
6733 fdh->elf.root.u.def.value,
6734 &fh->elf.root.u.def.section,
6735 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6736 {
6737 fh->elf.root.type = fdh->elf.root.type;
6738 fh->elf.forced_local = 1;
6739 fh->elf.def_regular = fdh->elf.def_regular;
6740 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6741 }
6742
6743 /* If this is a function code symbol, transfer dynamic linking
6744 information to the function descriptor symbol. */
6745 if (!fh->is_func)
6746 return TRUE;
6747
6748 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6749 if (ent->plt.refcount > 0)
6750 break;
6751 if (ent == NULL
6752 || fh->elf.root.root.string[0] != '.'
6753 || fh->elf.root.root.string[1] == '\0')
6754 return TRUE;
6755
6756 /* Find the corresponding function descriptor symbol. Create it
6757 as undefined if necessary. */
6758
6759 fdh = lookup_fdh (fh, htab);
6760 if (fdh == NULL
6761 && !info->executable
6762 && (fh->elf.root.type == bfd_link_hash_undefined
6763 || fh->elf.root.type == bfd_link_hash_undefweak))
6764 {
6765 fdh = make_fdh (info, fh);
6766 if (fdh == NULL)
6767 return FALSE;
6768 }
6769
6770 /* Fake function descriptors are made undefweak. If the function
6771 code symbol is strong undefined, make the fake sym the same.
6772 If the function code symbol is defined, then force the fake
6773 descriptor local; We can't support overriding of symbols in a
6774 shared library on a fake descriptor. */
6775
6776 if (fdh != NULL
6777 && fdh->fake
6778 && fdh->elf.root.type == bfd_link_hash_undefweak)
6779 {
6780 if (fh->elf.root.type == bfd_link_hash_undefined)
6781 {
6782 fdh->elf.root.type = bfd_link_hash_undefined;
6783 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6784 }
6785 else if (fh->elf.root.type == bfd_link_hash_defined
6786 || fh->elf.root.type == bfd_link_hash_defweak)
6787 {
6788 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6789 }
6790 }
6791
6792 if (fdh != NULL
6793 && !fdh->elf.forced_local
6794 && (!info->executable
6795 || fdh->elf.def_dynamic
6796 || fdh->elf.ref_dynamic
6797 || (fdh->elf.root.type == bfd_link_hash_undefweak
6798 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6799 {
6800 if (fdh->elf.dynindx == -1)
6801 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6802 return FALSE;
6803 fdh->elf.ref_regular |= fh->elf.ref_regular;
6804 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6805 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6806 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6807 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6808 {
6809 move_plt_plist (fh, fdh);
6810 fdh->elf.needs_plt = 1;
6811 }
6812 fdh->is_func_descriptor = 1;
6813 fdh->oh = fh;
6814 fh->oh = fdh;
6815 }
6816
6817 /* Now that the info is on the function descriptor, clear the
6818 function code sym info. Any function code syms for which we
6819 don't have a definition in a regular file, we force local.
6820 This prevents a shared library from exporting syms that have
6821 been imported from another library. Function code syms that
6822 are really in the library we must leave global to prevent the
6823 linker dragging in a definition from a static library. */
6824 force_local = (!fh->elf.def_regular
6825 || fdh == NULL
6826 || !fdh->elf.def_regular
6827 || fdh->elf.forced_local);
6828 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6829
6830 return TRUE;
6831 }
6832
6833 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6834 this hook to a) provide some gcc support functions, and b) transfer
6835 dynamic linking information gathered so far on function code symbol
6836 entries, to their corresponding function descriptor symbol entries. */
6837
6838 static bfd_boolean
6839 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6840 struct bfd_link_info *info)
6841 {
6842 struct ppc_link_hash_table *htab;
6843 unsigned int i;
6844 static const struct sfpr_def_parms funcs[] =
6845 {
6846 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6847 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6848 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6849 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6850 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6851 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6852 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6853 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6854 { "._savef", 14, 31, savefpr, savefpr1_tail },
6855 { "._restf", 14, 31, restfpr, restfpr1_tail },
6856 { "_savevr_", 20, 31, savevr, savevr_tail },
6857 { "_restvr_", 20, 31, restvr, restvr_tail }
6858 };
6859
6860 htab = ppc_hash_table (info);
6861 if (htab == NULL)
6862 return FALSE;
6863
6864 if (!info->relocatable
6865 && htab->elf.hgot != NULL)
6866 {
6867 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6868 /* Make .TOC. defined so as to prevent it being made dynamic.
6869 The wrong value here is fixed later in ppc64_elf_set_toc. */
6870 htab->elf.hgot->type = STT_OBJECT;
6871 htab->elf.hgot->root.type = bfd_link_hash_defined;
6872 htab->elf.hgot->root.u.def.value = 0;
6873 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
6874 htab->elf.hgot->def_regular = 1;
6875 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
6876 | STV_HIDDEN);
6877 }
6878
6879 if (htab->sfpr == NULL)
6880 /* We don't have any relocs. */
6881 return TRUE;
6882
6883 /* Provide any missing _save* and _rest* functions. */
6884 htab->sfpr->size = 0;
6885 if (htab->params->save_restore_funcs)
6886 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6887 if (!sfpr_define (info, &funcs[i]))
6888 return FALSE;
6889
6890 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6891
6892 if (htab->sfpr->size == 0)
6893 htab->sfpr->flags |= SEC_EXCLUDE;
6894
6895 return TRUE;
6896 }
6897
6898 /* Return true if we have dynamic relocs that apply to read-only sections. */
6899
6900 static bfd_boolean
6901 readonly_dynrelocs (struct elf_link_hash_entry *h)
6902 {
6903 struct ppc_link_hash_entry *eh;
6904 struct elf_dyn_relocs *p;
6905
6906 eh = (struct ppc_link_hash_entry *) h;
6907 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6908 {
6909 asection *s = p->sec->output_section;
6910
6911 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6912 return TRUE;
6913 }
6914 return FALSE;
6915 }
6916
6917 /* Adjust a symbol defined by a dynamic object and referenced by a
6918 regular object. The current definition is in some section of the
6919 dynamic object, but we're not including those sections. We have to
6920 change the definition to something the rest of the link can
6921 understand. */
6922
6923 static bfd_boolean
6924 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6925 struct elf_link_hash_entry *h)
6926 {
6927 struct ppc_link_hash_table *htab;
6928 asection *s;
6929
6930 htab = ppc_hash_table (info);
6931 if (htab == NULL)
6932 return FALSE;
6933
6934 /* Deal with function syms. */
6935 if (h->type == STT_FUNC
6936 || h->type == STT_GNU_IFUNC
6937 || h->needs_plt)
6938 {
6939 /* Clear procedure linkage table information for any symbol that
6940 won't need a .plt entry. */
6941 struct plt_entry *ent;
6942 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6943 if (ent->plt.refcount > 0)
6944 break;
6945 if (ent == NULL
6946 || (h->type != STT_GNU_IFUNC
6947 && (SYMBOL_CALLS_LOCAL (info, h)
6948 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6949 && h->root.type == bfd_link_hash_undefweak))))
6950 {
6951 h->plt.plist = NULL;
6952 h->needs_plt = 0;
6953 }
6954 else if (abiversion (info->output_bfd) == 2)
6955 {
6956 /* After adjust_dynamic_symbol, non_got_ref set in the
6957 non-shared case means that we have allocated space in
6958 .dynbss for the symbol and thus dyn_relocs for this
6959 symbol should be discarded.
6960 If we get here we know we are making a PLT entry for this
6961 symbol, and in an executable we'd normally resolve
6962 relocations against this symbol to the PLT entry. Allow
6963 dynamic relocs if the reference is weak, and the dynamic
6964 relocs will not cause text relocation. */
6965 if (!h->ref_regular_nonweak
6966 && h->non_got_ref
6967 && h->type != STT_GNU_IFUNC
6968 && !readonly_dynrelocs (h))
6969 h->non_got_ref = 0;
6970
6971 /* If making a plt entry, then we don't need copy relocs. */
6972 return TRUE;
6973 }
6974 }
6975 else
6976 h->plt.plist = NULL;
6977
6978 /* If this is a weak symbol, and there is a real definition, the
6979 processor independent code will have arranged for us to see the
6980 real definition first, and we can just use the same value. */
6981 if (h->u.weakdef != NULL)
6982 {
6983 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6984 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6985 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6986 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6987 if (ELIMINATE_COPY_RELOCS)
6988 h->non_got_ref = h->u.weakdef->non_got_ref;
6989 return TRUE;
6990 }
6991
6992 /* If we are creating a shared library, we must presume that the
6993 only references to the symbol are via the global offset table.
6994 For such cases we need not do anything here; the relocations will
6995 be handled correctly by relocate_section. */
6996 if (info->shared)
6997 return TRUE;
6998
6999 /* If there are no references to this symbol that do not use the
7000 GOT, we don't need to generate a copy reloc. */
7001 if (!h->non_got_ref)
7002 return TRUE;
7003
7004 /* Don't generate a copy reloc for symbols defined in the executable. */
7005 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
7006 return TRUE;
7007
7008 /* If we didn't find any dynamic relocs in read-only sections, then
7009 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7010 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7011 {
7012 h->non_got_ref = 0;
7013 return TRUE;
7014 }
7015
7016 if (h->plt.plist != NULL)
7017 {
7018 /* We should never get here, but unfortunately there are versions
7019 of gcc out there that improperly (for this ABI) put initialized
7020 function pointers, vtable refs and suchlike in read-only
7021 sections. Allow them to proceed, but warn that this might
7022 break at runtime. */
7023 info->callbacks->einfo
7024 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7025 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7026 h->root.root.string);
7027 }
7028
7029 /* This is a reference to a symbol defined by a dynamic object which
7030 is not a function. */
7031
7032 /* We must allocate the symbol in our .dynbss section, which will
7033 become part of the .bss section of the executable. There will be
7034 an entry for this symbol in the .dynsym section. The dynamic
7035 object will contain position independent code, so all references
7036 from the dynamic object to this symbol will go through the global
7037 offset table. The dynamic linker will use the .dynsym entry to
7038 determine the address it must put in the global offset table, so
7039 both the dynamic object and the regular object will refer to the
7040 same memory location for the variable. */
7041
7042 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7043 to copy the initial value out of the dynamic object and into the
7044 runtime process image. We need to remember the offset into the
7045 .rela.bss section we are going to use. */
7046 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7047 {
7048 htab->relbss->size += sizeof (Elf64_External_Rela);
7049 h->needs_copy = 1;
7050 }
7051
7052 s = htab->dynbss;
7053
7054 return _bfd_elf_adjust_dynamic_copy (h, s);
7055 }
7056
7057 /* If given a function descriptor symbol, hide both the function code
7058 sym and the descriptor. */
7059 static void
7060 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7061 struct elf_link_hash_entry *h,
7062 bfd_boolean force_local)
7063 {
7064 struct ppc_link_hash_entry *eh;
7065 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7066
7067 eh = (struct ppc_link_hash_entry *) h;
7068 if (eh->is_func_descriptor)
7069 {
7070 struct ppc_link_hash_entry *fh = eh->oh;
7071
7072 if (fh == NULL)
7073 {
7074 const char *p, *q;
7075 struct ppc_link_hash_table *htab;
7076 char save;
7077
7078 /* We aren't supposed to use alloca in BFD because on
7079 systems which do not have alloca the version in libiberty
7080 calls xmalloc, which might cause the program to crash
7081 when it runs out of memory. This function doesn't have a
7082 return status, so there's no way to gracefully return an
7083 error. So cheat. We know that string[-1] can be safely
7084 accessed; It's either a string in an ELF string table,
7085 or allocated in an objalloc structure. */
7086
7087 p = eh->elf.root.root.string - 1;
7088 save = *p;
7089 *(char *) p = '.';
7090 htab = ppc_hash_table (info);
7091 if (htab == NULL)
7092 return;
7093
7094 fh = (struct ppc_link_hash_entry *)
7095 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7096 *(char *) p = save;
7097
7098 /* Unfortunately, if it so happens that the string we were
7099 looking for was allocated immediately before this string,
7100 then we overwrote the string terminator. That's the only
7101 reason the lookup should fail. */
7102 if (fh == NULL)
7103 {
7104 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7105 while (q >= eh->elf.root.root.string && *q == *p)
7106 --q, --p;
7107 if (q < eh->elf.root.root.string && *p == '.')
7108 fh = (struct ppc_link_hash_entry *)
7109 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7110 }
7111 if (fh != NULL)
7112 {
7113 eh->oh = fh;
7114 fh->oh = eh;
7115 }
7116 }
7117 if (fh != NULL)
7118 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7119 }
7120 }
7121
7122 static bfd_boolean
7123 get_sym_h (struct elf_link_hash_entry **hp,
7124 Elf_Internal_Sym **symp,
7125 asection **symsecp,
7126 unsigned char **tls_maskp,
7127 Elf_Internal_Sym **locsymsp,
7128 unsigned long r_symndx,
7129 bfd *ibfd)
7130 {
7131 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7132
7133 if (r_symndx >= symtab_hdr->sh_info)
7134 {
7135 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7136 struct elf_link_hash_entry *h;
7137
7138 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7139 h = elf_follow_link (h);
7140
7141 if (hp != NULL)
7142 *hp = h;
7143
7144 if (symp != NULL)
7145 *symp = NULL;
7146
7147 if (symsecp != NULL)
7148 {
7149 asection *symsec = NULL;
7150 if (h->root.type == bfd_link_hash_defined
7151 || h->root.type == bfd_link_hash_defweak)
7152 symsec = h->root.u.def.section;
7153 *symsecp = symsec;
7154 }
7155
7156 if (tls_maskp != NULL)
7157 {
7158 struct ppc_link_hash_entry *eh;
7159
7160 eh = (struct ppc_link_hash_entry *) h;
7161 *tls_maskp = &eh->tls_mask;
7162 }
7163 }
7164 else
7165 {
7166 Elf_Internal_Sym *sym;
7167 Elf_Internal_Sym *locsyms = *locsymsp;
7168
7169 if (locsyms == NULL)
7170 {
7171 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7172 if (locsyms == NULL)
7173 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7174 symtab_hdr->sh_info,
7175 0, NULL, NULL, NULL);
7176 if (locsyms == NULL)
7177 return FALSE;
7178 *locsymsp = locsyms;
7179 }
7180 sym = locsyms + r_symndx;
7181
7182 if (hp != NULL)
7183 *hp = NULL;
7184
7185 if (symp != NULL)
7186 *symp = sym;
7187
7188 if (symsecp != NULL)
7189 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7190
7191 if (tls_maskp != NULL)
7192 {
7193 struct got_entry **lgot_ents;
7194 unsigned char *tls_mask;
7195
7196 tls_mask = NULL;
7197 lgot_ents = elf_local_got_ents (ibfd);
7198 if (lgot_ents != NULL)
7199 {
7200 struct plt_entry **local_plt = (struct plt_entry **)
7201 (lgot_ents + symtab_hdr->sh_info);
7202 unsigned char *lgot_masks = (unsigned char *)
7203 (local_plt + symtab_hdr->sh_info);
7204 tls_mask = &lgot_masks[r_symndx];
7205 }
7206 *tls_maskp = tls_mask;
7207 }
7208 }
7209 return TRUE;
7210 }
7211
7212 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7213 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7214 type suitable for optimization, and 1 otherwise. */
7215
7216 static int
7217 get_tls_mask (unsigned char **tls_maskp,
7218 unsigned long *toc_symndx,
7219 bfd_vma *toc_addend,
7220 Elf_Internal_Sym **locsymsp,
7221 const Elf_Internal_Rela *rel,
7222 bfd *ibfd)
7223 {
7224 unsigned long r_symndx;
7225 int next_r;
7226 struct elf_link_hash_entry *h;
7227 Elf_Internal_Sym *sym;
7228 asection *sec;
7229 bfd_vma off;
7230
7231 r_symndx = ELF64_R_SYM (rel->r_info);
7232 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7233 return 0;
7234
7235 if ((*tls_maskp != NULL && **tls_maskp != 0)
7236 || sec == NULL
7237 || ppc64_elf_section_data (sec) == NULL
7238 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7239 return 1;
7240
7241 /* Look inside a TOC section too. */
7242 if (h != NULL)
7243 {
7244 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7245 off = h->root.u.def.value;
7246 }
7247 else
7248 off = sym->st_value;
7249 off += rel->r_addend;
7250 BFD_ASSERT (off % 8 == 0);
7251 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7252 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7253 if (toc_symndx != NULL)
7254 *toc_symndx = r_symndx;
7255 if (toc_addend != NULL)
7256 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7257 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7258 return 0;
7259 if ((h == NULL || is_static_defined (h))
7260 && (next_r == -1 || next_r == -2))
7261 return 1 - next_r;
7262 return 1;
7263 }
7264
7265 /* Find (or create) an entry in the tocsave hash table. */
7266
7267 static struct tocsave_entry *
7268 tocsave_find (struct ppc_link_hash_table *htab,
7269 enum insert_option insert,
7270 Elf_Internal_Sym **local_syms,
7271 const Elf_Internal_Rela *irela,
7272 bfd *ibfd)
7273 {
7274 unsigned long r_indx;
7275 struct elf_link_hash_entry *h;
7276 Elf_Internal_Sym *sym;
7277 struct tocsave_entry ent, *p;
7278 hashval_t hash;
7279 struct tocsave_entry **slot;
7280
7281 r_indx = ELF64_R_SYM (irela->r_info);
7282 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7283 return NULL;
7284 if (ent.sec == NULL || ent.sec->output_section == NULL)
7285 {
7286 (*_bfd_error_handler)
7287 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7288 return NULL;
7289 }
7290
7291 if (h != NULL)
7292 ent.offset = h->root.u.def.value;
7293 else
7294 ent.offset = sym->st_value;
7295 ent.offset += irela->r_addend;
7296
7297 hash = tocsave_htab_hash (&ent);
7298 slot = ((struct tocsave_entry **)
7299 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7300 if (slot == NULL)
7301 return NULL;
7302
7303 if (*slot == NULL)
7304 {
7305 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7306 if (p == NULL)
7307 return NULL;
7308 *p = ent;
7309 *slot = p;
7310 }
7311 return *slot;
7312 }
7313
7314 /* Adjust all global syms defined in opd sections. In gcc generated
7315 code for the old ABI, these will already have been done. */
7316
7317 static bfd_boolean
7318 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7319 {
7320 struct ppc_link_hash_entry *eh;
7321 asection *sym_sec;
7322 struct _opd_sec_data *opd;
7323
7324 if (h->root.type == bfd_link_hash_indirect)
7325 return TRUE;
7326
7327 if (h->root.type != bfd_link_hash_defined
7328 && h->root.type != bfd_link_hash_defweak)
7329 return TRUE;
7330
7331 eh = (struct ppc_link_hash_entry *) h;
7332 if (eh->adjust_done)
7333 return TRUE;
7334
7335 sym_sec = eh->elf.root.u.def.section;
7336 opd = get_opd_info (sym_sec);
7337 if (opd != NULL && opd->adjust != NULL)
7338 {
7339 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
7340 if (adjust == -1)
7341 {
7342 /* This entry has been deleted. */
7343 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7344 if (dsec == NULL)
7345 {
7346 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7347 if (discarded_section (dsec))
7348 {
7349 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7350 break;
7351 }
7352 }
7353 eh->elf.root.u.def.value = 0;
7354 eh->elf.root.u.def.section = dsec;
7355 }
7356 else
7357 eh->elf.root.u.def.value += adjust;
7358 eh->adjust_done = 1;
7359 }
7360 return TRUE;
7361 }
7362
7363 /* Handles decrementing dynamic reloc counts for the reloc specified by
7364 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7365 have already been determined. */
7366
7367 static bfd_boolean
7368 dec_dynrel_count (bfd_vma r_info,
7369 asection *sec,
7370 struct bfd_link_info *info,
7371 Elf_Internal_Sym **local_syms,
7372 struct elf_link_hash_entry *h,
7373 Elf_Internal_Sym *sym)
7374 {
7375 enum elf_ppc64_reloc_type r_type;
7376 asection *sym_sec = NULL;
7377
7378 /* Can this reloc be dynamic? This switch, and later tests here
7379 should be kept in sync with the code in check_relocs. */
7380 r_type = ELF64_R_TYPE (r_info);
7381 switch (r_type)
7382 {
7383 default:
7384 return TRUE;
7385
7386 case R_PPC64_TPREL16:
7387 case R_PPC64_TPREL16_LO:
7388 case R_PPC64_TPREL16_HI:
7389 case R_PPC64_TPREL16_HA:
7390 case R_PPC64_TPREL16_DS:
7391 case R_PPC64_TPREL16_LO_DS:
7392 case R_PPC64_TPREL16_HIGH:
7393 case R_PPC64_TPREL16_HIGHA:
7394 case R_PPC64_TPREL16_HIGHER:
7395 case R_PPC64_TPREL16_HIGHERA:
7396 case R_PPC64_TPREL16_HIGHEST:
7397 case R_PPC64_TPREL16_HIGHESTA:
7398 if (!info->shared)
7399 return TRUE;
7400
7401 case R_PPC64_TPREL64:
7402 case R_PPC64_DTPMOD64:
7403 case R_PPC64_DTPREL64:
7404 case R_PPC64_ADDR64:
7405 case R_PPC64_REL30:
7406 case R_PPC64_REL32:
7407 case R_PPC64_REL64:
7408 case R_PPC64_ADDR14:
7409 case R_PPC64_ADDR14_BRNTAKEN:
7410 case R_PPC64_ADDR14_BRTAKEN:
7411 case R_PPC64_ADDR16:
7412 case R_PPC64_ADDR16_DS:
7413 case R_PPC64_ADDR16_HA:
7414 case R_PPC64_ADDR16_HI:
7415 case R_PPC64_ADDR16_HIGH:
7416 case R_PPC64_ADDR16_HIGHA:
7417 case R_PPC64_ADDR16_HIGHER:
7418 case R_PPC64_ADDR16_HIGHERA:
7419 case R_PPC64_ADDR16_HIGHEST:
7420 case R_PPC64_ADDR16_HIGHESTA:
7421 case R_PPC64_ADDR16_LO:
7422 case R_PPC64_ADDR16_LO_DS:
7423 case R_PPC64_ADDR24:
7424 case R_PPC64_ADDR32:
7425 case R_PPC64_UADDR16:
7426 case R_PPC64_UADDR32:
7427 case R_PPC64_UADDR64:
7428 case R_PPC64_TOC:
7429 break;
7430 }
7431
7432 if (local_syms != NULL)
7433 {
7434 unsigned long r_symndx;
7435 bfd *ibfd = sec->owner;
7436
7437 r_symndx = ELF64_R_SYM (r_info);
7438 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7439 return FALSE;
7440 }
7441
7442 if ((info->shared
7443 && (must_be_dyn_reloc (info, r_type)
7444 || (h != NULL
7445 && (!SYMBOLIC_BIND (info, h)
7446 || h->root.type == bfd_link_hash_defweak
7447 || !h->def_regular))))
7448 || (ELIMINATE_COPY_RELOCS
7449 && !info->shared
7450 && h != NULL
7451 && (h->root.type == bfd_link_hash_defweak
7452 || !h->def_regular)))
7453 ;
7454 else
7455 return TRUE;
7456
7457 if (h != NULL)
7458 {
7459 struct elf_dyn_relocs *p;
7460 struct elf_dyn_relocs **pp;
7461 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7462
7463 /* elf_gc_sweep may have already removed all dyn relocs associated
7464 with local syms for a given section. Also, symbol flags are
7465 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7466 report a dynreloc miscount. */
7467 if (*pp == NULL && info->gc_sections)
7468 return TRUE;
7469
7470 while ((p = *pp) != NULL)
7471 {
7472 if (p->sec == sec)
7473 {
7474 if (!must_be_dyn_reloc (info, r_type))
7475 p->pc_count -= 1;
7476 p->count -= 1;
7477 if (p->count == 0)
7478 *pp = p->next;
7479 return TRUE;
7480 }
7481 pp = &p->next;
7482 }
7483 }
7484 else
7485 {
7486 struct ppc_dyn_relocs *p;
7487 struct ppc_dyn_relocs **pp;
7488 void *vpp;
7489 bfd_boolean is_ifunc;
7490
7491 if (local_syms == NULL)
7492 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7493 if (sym_sec == NULL)
7494 sym_sec = sec;
7495
7496 vpp = &elf_section_data (sym_sec)->local_dynrel;
7497 pp = (struct ppc_dyn_relocs **) vpp;
7498
7499 if (*pp == NULL && info->gc_sections)
7500 return TRUE;
7501
7502 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7503 while ((p = *pp) != NULL)
7504 {
7505 if (p->sec == sec && p->ifunc == is_ifunc)
7506 {
7507 p->count -= 1;
7508 if (p->count == 0)
7509 *pp = p->next;
7510 return TRUE;
7511 }
7512 pp = &p->next;
7513 }
7514 }
7515
7516 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7517 sec->owner, sec);
7518 bfd_set_error (bfd_error_bad_value);
7519 return FALSE;
7520 }
7521
7522 /* Remove unused Official Procedure Descriptor entries. Currently we
7523 only remove those associated with functions in discarded link-once
7524 sections, or weakly defined functions that have been overridden. It
7525 would be possible to remove many more entries for statically linked
7526 applications. */
7527
7528 bfd_boolean
7529 ppc64_elf_edit_opd (struct bfd_link_info *info)
7530 {
7531 bfd *ibfd;
7532 bfd_boolean some_edited = FALSE;
7533 asection *need_pad = NULL;
7534 struct ppc_link_hash_table *htab;
7535
7536 htab = ppc_hash_table (info);
7537 if (htab == NULL)
7538 return FALSE;
7539
7540 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7541 {
7542 asection *sec;
7543 Elf_Internal_Rela *relstart, *rel, *relend;
7544 Elf_Internal_Shdr *symtab_hdr;
7545 Elf_Internal_Sym *local_syms;
7546 bfd_vma offset;
7547 struct _opd_sec_data *opd;
7548 bfd_boolean need_edit, add_aux_fields;
7549 bfd_size_type cnt_16b = 0;
7550
7551 if (!is_ppc64_elf (ibfd))
7552 continue;
7553
7554 sec = bfd_get_section_by_name (ibfd, ".opd");
7555 if (sec == NULL || sec->size == 0)
7556 continue;
7557
7558 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7559 continue;
7560
7561 if (sec->output_section == bfd_abs_section_ptr)
7562 continue;
7563
7564 /* Look through the section relocs. */
7565 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7566 continue;
7567
7568 local_syms = NULL;
7569 symtab_hdr = &elf_symtab_hdr (ibfd);
7570
7571 /* Read the relocations. */
7572 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7573 info->keep_memory);
7574 if (relstart == NULL)
7575 return FALSE;
7576
7577 /* First run through the relocs to check they are sane, and to
7578 determine whether we need to edit this opd section. */
7579 need_edit = FALSE;
7580 need_pad = sec;
7581 offset = 0;
7582 relend = relstart + sec->reloc_count;
7583 for (rel = relstart; rel < relend; )
7584 {
7585 enum elf_ppc64_reloc_type r_type;
7586 unsigned long r_symndx;
7587 asection *sym_sec;
7588 struct elf_link_hash_entry *h;
7589 Elf_Internal_Sym *sym;
7590
7591 /* .opd contains a regular array of 16 or 24 byte entries. We're
7592 only interested in the reloc pointing to a function entry
7593 point. */
7594 if (rel->r_offset != offset
7595 || rel + 1 >= relend
7596 || (rel + 1)->r_offset != offset + 8)
7597 {
7598 /* If someone messes with .opd alignment then after a
7599 "ld -r" we might have padding in the middle of .opd.
7600 Also, there's nothing to prevent someone putting
7601 something silly in .opd with the assembler. No .opd
7602 optimization for them! */
7603 broken_opd:
7604 (*_bfd_error_handler)
7605 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7606 need_edit = FALSE;
7607 break;
7608 }
7609
7610 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7611 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7612 {
7613 (*_bfd_error_handler)
7614 (_("%B: unexpected reloc type %u in .opd section"),
7615 ibfd, r_type);
7616 need_edit = FALSE;
7617 break;
7618 }
7619
7620 r_symndx = ELF64_R_SYM (rel->r_info);
7621 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7622 r_symndx, ibfd))
7623 goto error_ret;
7624
7625 if (sym_sec == NULL || sym_sec->owner == NULL)
7626 {
7627 const char *sym_name;
7628 if (h != NULL)
7629 sym_name = h->root.root.string;
7630 else
7631 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7632 sym_sec);
7633
7634 (*_bfd_error_handler)
7635 (_("%B: undefined sym `%s' in .opd section"),
7636 ibfd, sym_name);
7637 need_edit = FALSE;
7638 break;
7639 }
7640
7641 /* opd entries are always for functions defined in the
7642 current input bfd. If the symbol isn't defined in the
7643 input bfd, then we won't be using the function in this
7644 bfd; It must be defined in a linkonce section in another
7645 bfd, or is weak. It's also possible that we are
7646 discarding the function due to a linker script /DISCARD/,
7647 which we test for via the output_section. */
7648 if (sym_sec->owner != ibfd
7649 || sym_sec->output_section == bfd_abs_section_ptr)
7650 need_edit = TRUE;
7651
7652 rel += 2;
7653 if (rel == relend
7654 || (rel + 1 == relend && rel->r_offset == offset + 16))
7655 {
7656 if (sec->size == offset + 24)
7657 {
7658 need_pad = NULL;
7659 break;
7660 }
7661 if (rel == relend && sec->size == offset + 16)
7662 {
7663 cnt_16b++;
7664 break;
7665 }
7666 goto broken_opd;
7667 }
7668
7669 if (rel->r_offset == offset + 24)
7670 offset += 24;
7671 else if (rel->r_offset != offset + 16)
7672 goto broken_opd;
7673 else if (rel + 1 < relend
7674 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7675 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7676 {
7677 offset += 16;
7678 cnt_16b++;
7679 }
7680 else if (rel + 2 < relend
7681 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7682 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7683 {
7684 offset += 24;
7685 rel += 1;
7686 }
7687 else
7688 goto broken_opd;
7689 }
7690
7691 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7692
7693 if (need_edit || add_aux_fields)
7694 {
7695 Elf_Internal_Rela *write_rel;
7696 Elf_Internal_Shdr *rel_hdr;
7697 bfd_byte *rptr, *wptr;
7698 bfd_byte *new_contents;
7699 bfd_boolean skip;
7700 long opd_ent_size;
7701 bfd_size_type amt;
7702
7703 new_contents = NULL;
7704 amt = sec->size * sizeof (long) / 8;
7705 opd = &ppc64_elf_section_data (sec)->u.opd;
7706 opd->adjust = bfd_zalloc (sec->owner, amt);
7707 if (opd->adjust == NULL)
7708 return FALSE;
7709 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7710
7711 /* This seems a waste of time as input .opd sections are all
7712 zeros as generated by gcc, but I suppose there's no reason
7713 this will always be so. We might start putting something in
7714 the third word of .opd entries. */
7715 if ((sec->flags & SEC_IN_MEMORY) == 0)
7716 {
7717 bfd_byte *loc;
7718 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7719 {
7720 if (loc != NULL)
7721 free (loc);
7722 error_ret:
7723 if (local_syms != NULL
7724 && symtab_hdr->contents != (unsigned char *) local_syms)
7725 free (local_syms);
7726 if (elf_section_data (sec)->relocs != relstart)
7727 free (relstart);
7728 return FALSE;
7729 }
7730 sec->contents = loc;
7731 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7732 }
7733
7734 elf_section_data (sec)->relocs = relstart;
7735
7736 new_contents = sec->contents;
7737 if (add_aux_fields)
7738 {
7739 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7740 if (new_contents == NULL)
7741 return FALSE;
7742 need_pad = FALSE;
7743 }
7744 wptr = new_contents;
7745 rptr = sec->contents;
7746
7747 write_rel = relstart;
7748 skip = FALSE;
7749 offset = 0;
7750 opd_ent_size = 0;
7751 for (rel = relstart; rel < relend; rel++)
7752 {
7753 unsigned long r_symndx;
7754 asection *sym_sec;
7755 struct elf_link_hash_entry *h;
7756 Elf_Internal_Sym *sym;
7757
7758 r_symndx = ELF64_R_SYM (rel->r_info);
7759 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7760 r_symndx, ibfd))
7761 goto error_ret;
7762
7763 if (rel->r_offset == offset)
7764 {
7765 struct ppc_link_hash_entry *fdh = NULL;
7766
7767 /* See if the .opd entry is full 24 byte or
7768 16 byte (with fd_aux entry overlapped with next
7769 fd_func). */
7770 opd_ent_size = 24;
7771 if ((rel + 2 == relend && sec->size == offset + 16)
7772 || (rel + 3 < relend
7773 && rel[2].r_offset == offset + 16
7774 && rel[3].r_offset == offset + 24
7775 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7776 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7777 opd_ent_size = 16;
7778
7779 if (h != NULL
7780 && h->root.root.string[0] == '.')
7781 {
7782 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
7783 if (fdh != NULL
7784 && fdh->elf.root.type != bfd_link_hash_defined
7785 && fdh->elf.root.type != bfd_link_hash_defweak)
7786 fdh = NULL;
7787 }
7788
7789 skip = (sym_sec->owner != ibfd
7790 || sym_sec->output_section == bfd_abs_section_ptr);
7791 if (skip)
7792 {
7793 if (fdh != NULL && sym_sec->owner == ibfd)
7794 {
7795 /* Arrange for the function descriptor sym
7796 to be dropped. */
7797 fdh->elf.root.u.def.value = 0;
7798 fdh->elf.root.u.def.section = sym_sec;
7799 }
7800 opd->adjust[rel->r_offset / 8] = -1;
7801 }
7802 else
7803 {
7804 /* We'll be keeping this opd entry. */
7805
7806 if (fdh != NULL)
7807 {
7808 /* Redefine the function descriptor symbol to
7809 this location in the opd section. It is
7810 necessary to update the value here rather
7811 than using an array of adjustments as we do
7812 for local symbols, because various places
7813 in the generic ELF code use the value
7814 stored in u.def.value. */
7815 fdh->elf.root.u.def.value = wptr - new_contents;
7816 fdh->adjust_done = 1;
7817 }
7818
7819 /* Local syms are a bit tricky. We could
7820 tweak them as they can be cached, but
7821 we'd need to look through the local syms
7822 for the function descriptor sym which we
7823 don't have at the moment. So keep an
7824 array of adjustments. */
7825 opd->adjust[rel->r_offset / 8]
7826 = (wptr - new_contents) - (rptr - sec->contents);
7827
7828 if (wptr != rptr)
7829 memcpy (wptr, rptr, opd_ent_size);
7830 wptr += opd_ent_size;
7831 if (add_aux_fields && opd_ent_size == 16)
7832 {
7833 memset (wptr, '\0', 8);
7834 wptr += 8;
7835 }
7836 }
7837 rptr += opd_ent_size;
7838 offset += opd_ent_size;
7839 }
7840
7841 if (skip)
7842 {
7843 if (!NO_OPD_RELOCS
7844 && !info->relocatable
7845 && !dec_dynrel_count (rel->r_info, sec, info,
7846 NULL, h, sym))
7847 goto error_ret;
7848 }
7849 else
7850 {
7851 /* We need to adjust any reloc offsets to point to the
7852 new opd entries. While we're at it, we may as well
7853 remove redundant relocs. */
7854 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7855 if (write_rel != rel)
7856 memcpy (write_rel, rel, sizeof (*rel));
7857 ++write_rel;
7858 }
7859 }
7860
7861 sec->size = wptr - new_contents;
7862 sec->reloc_count = write_rel - relstart;
7863 if (add_aux_fields)
7864 {
7865 free (sec->contents);
7866 sec->contents = new_contents;
7867 }
7868
7869 /* Fudge the header size too, as this is used later in
7870 elf_bfd_final_link if we are emitting relocs. */
7871 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7872 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7873 some_edited = TRUE;
7874 }
7875 else if (elf_section_data (sec)->relocs != relstart)
7876 free (relstart);
7877
7878 if (local_syms != NULL
7879 && symtab_hdr->contents != (unsigned char *) local_syms)
7880 {
7881 if (!info->keep_memory)
7882 free (local_syms);
7883 else
7884 symtab_hdr->contents = (unsigned char *) local_syms;
7885 }
7886 }
7887
7888 if (some_edited)
7889 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7890
7891 /* If we are doing a final link and the last .opd entry is just 16 byte
7892 long, add a 8 byte padding after it. */
7893 if (need_pad != NULL && !info->relocatable)
7894 {
7895 bfd_byte *p;
7896
7897 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7898 {
7899 BFD_ASSERT (need_pad->size > 0);
7900
7901 p = bfd_malloc (need_pad->size + 8);
7902 if (p == NULL)
7903 return FALSE;
7904
7905 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7906 p, 0, need_pad->size))
7907 return FALSE;
7908
7909 need_pad->contents = p;
7910 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7911 }
7912 else
7913 {
7914 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7915 if (p == NULL)
7916 return FALSE;
7917
7918 need_pad->contents = p;
7919 }
7920
7921 memset (need_pad->contents + need_pad->size, 0, 8);
7922 need_pad->size += 8;
7923 }
7924
7925 return TRUE;
7926 }
7927
7928 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7929
7930 asection *
7931 ppc64_elf_tls_setup (struct bfd_link_info *info)
7932 {
7933 struct ppc_link_hash_table *htab;
7934
7935 htab = ppc_hash_table (info);
7936 if (htab == NULL)
7937 return NULL;
7938
7939 if (abiversion (info->output_bfd) == 1)
7940 htab->opd_abi = 1;
7941
7942 if (htab->params->no_multi_toc)
7943 htab->do_multi_toc = 0;
7944 else if (!htab->do_multi_toc)
7945 htab->params->no_multi_toc = 1;
7946
7947 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7948 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7949 FALSE, FALSE, TRUE));
7950 /* Move dynamic linking info to the function descriptor sym. */
7951 if (htab->tls_get_addr != NULL)
7952 func_desc_adjust (&htab->tls_get_addr->elf, info);
7953 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7954 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7955 FALSE, FALSE, TRUE));
7956 if (!htab->params->no_tls_get_addr_opt)
7957 {
7958 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7959
7960 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7961 FALSE, FALSE, TRUE);
7962 if (opt != NULL)
7963 func_desc_adjust (opt, info);
7964 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7965 FALSE, FALSE, TRUE);
7966 if (opt_fd != NULL
7967 && (opt_fd->root.type == bfd_link_hash_defined
7968 || opt_fd->root.type == bfd_link_hash_defweak))
7969 {
7970 /* If glibc supports an optimized __tls_get_addr call stub,
7971 signalled by the presence of __tls_get_addr_opt, and we'll
7972 be calling __tls_get_addr via a plt call stub, then
7973 make __tls_get_addr point to __tls_get_addr_opt. */
7974 tga_fd = &htab->tls_get_addr_fd->elf;
7975 if (htab->elf.dynamic_sections_created
7976 && tga_fd != NULL
7977 && (tga_fd->type == STT_FUNC
7978 || tga_fd->needs_plt)
7979 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7980 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7981 && tga_fd->root.type == bfd_link_hash_undefweak)))
7982 {
7983 struct plt_entry *ent;
7984
7985 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7986 if (ent->plt.refcount > 0)
7987 break;
7988 if (ent != NULL)
7989 {
7990 tga_fd->root.type = bfd_link_hash_indirect;
7991 tga_fd->root.u.i.link = &opt_fd->root;
7992 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7993 if (opt_fd->dynindx != -1)
7994 {
7995 /* Use __tls_get_addr_opt in dynamic relocations. */
7996 opt_fd->dynindx = -1;
7997 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7998 opt_fd->dynstr_index);
7999 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8000 return NULL;
8001 }
8002 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8003 tga = &htab->tls_get_addr->elf;
8004 if (opt != NULL && tga != NULL)
8005 {
8006 tga->root.type = bfd_link_hash_indirect;
8007 tga->root.u.i.link = &opt->root;
8008 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8009 _bfd_elf_link_hash_hide_symbol (info, opt,
8010 tga->forced_local);
8011 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8012 }
8013 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8014 htab->tls_get_addr_fd->is_func_descriptor = 1;
8015 if (htab->tls_get_addr != NULL)
8016 {
8017 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8018 htab->tls_get_addr->is_func = 1;
8019 }
8020 }
8021 }
8022 }
8023 else
8024 htab->params->no_tls_get_addr_opt = TRUE;
8025 }
8026 return _bfd_elf_tls_setup (info->output_bfd, info);
8027 }
8028
8029 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8030 HASH1 or HASH2. */
8031
8032 static bfd_boolean
8033 branch_reloc_hash_match (const bfd *ibfd,
8034 const Elf_Internal_Rela *rel,
8035 const struct ppc_link_hash_entry *hash1,
8036 const struct ppc_link_hash_entry *hash2)
8037 {
8038 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8039 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8040 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8041
8042 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8043 {
8044 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8045 struct elf_link_hash_entry *h;
8046
8047 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8048 h = elf_follow_link (h);
8049 if (h == &hash1->elf || h == &hash2->elf)
8050 return TRUE;
8051 }
8052 return FALSE;
8053 }
8054
8055 /* Run through all the TLS relocs looking for optimization
8056 opportunities. The linker has been hacked (see ppc64elf.em) to do
8057 a preliminary section layout so that we know the TLS segment
8058 offsets. We can't optimize earlier because some optimizations need
8059 to know the tp offset, and we need to optimize before allocating
8060 dynamic relocations. */
8061
8062 bfd_boolean
8063 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8064 {
8065 bfd *ibfd;
8066 asection *sec;
8067 struct ppc_link_hash_table *htab;
8068 unsigned char *toc_ref;
8069 int pass;
8070
8071 if (info->relocatable || !info->executable)
8072 return TRUE;
8073
8074 htab = ppc_hash_table (info);
8075 if (htab == NULL)
8076 return FALSE;
8077
8078 /* Make two passes over the relocs. On the first pass, mark toc
8079 entries involved with tls relocs, and check that tls relocs
8080 involved in setting up a tls_get_addr call are indeed followed by
8081 such a call. If they are not, we can't do any tls optimization.
8082 On the second pass twiddle tls_mask flags to notify
8083 relocate_section that optimization can be done, and adjust got
8084 and plt refcounts. */
8085 toc_ref = NULL;
8086 for (pass = 0; pass < 2; ++pass)
8087 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8088 {
8089 Elf_Internal_Sym *locsyms = NULL;
8090 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8091
8092 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8093 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8094 {
8095 Elf_Internal_Rela *relstart, *rel, *relend;
8096 bfd_boolean found_tls_get_addr_arg = 0;
8097
8098 /* Read the relocations. */
8099 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8100 info->keep_memory);
8101 if (relstart == NULL)
8102 {
8103 free (toc_ref);
8104 return FALSE;
8105 }
8106
8107 relend = relstart + sec->reloc_count;
8108 for (rel = relstart; rel < relend; rel++)
8109 {
8110 enum elf_ppc64_reloc_type r_type;
8111 unsigned long r_symndx;
8112 struct elf_link_hash_entry *h;
8113 Elf_Internal_Sym *sym;
8114 asection *sym_sec;
8115 unsigned char *tls_mask;
8116 unsigned char tls_set, tls_clear, tls_type = 0;
8117 bfd_vma value;
8118 bfd_boolean ok_tprel, is_local;
8119 long toc_ref_index = 0;
8120 int expecting_tls_get_addr = 0;
8121 bfd_boolean ret = FALSE;
8122
8123 r_symndx = ELF64_R_SYM (rel->r_info);
8124 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8125 r_symndx, ibfd))
8126 {
8127 err_free_rel:
8128 if (elf_section_data (sec)->relocs != relstart)
8129 free (relstart);
8130 if (toc_ref != NULL)
8131 free (toc_ref);
8132 if (locsyms != NULL
8133 && (elf_symtab_hdr (ibfd).contents
8134 != (unsigned char *) locsyms))
8135 free (locsyms);
8136 return ret;
8137 }
8138
8139 if (h != NULL)
8140 {
8141 if (h->root.type == bfd_link_hash_defined
8142 || h->root.type == bfd_link_hash_defweak)
8143 value = h->root.u.def.value;
8144 else if (h->root.type == bfd_link_hash_undefweak)
8145 value = 0;
8146 else
8147 {
8148 found_tls_get_addr_arg = 0;
8149 continue;
8150 }
8151 }
8152 else
8153 /* Symbols referenced by TLS relocs must be of type
8154 STT_TLS. So no need for .opd local sym adjust. */
8155 value = sym->st_value;
8156
8157 ok_tprel = FALSE;
8158 is_local = FALSE;
8159 if (h == NULL
8160 || !h->def_dynamic)
8161 {
8162 is_local = TRUE;
8163 if (h != NULL
8164 && h->root.type == bfd_link_hash_undefweak)
8165 ok_tprel = TRUE;
8166 else
8167 {
8168 value += sym_sec->output_offset;
8169 value += sym_sec->output_section->vma;
8170 value -= htab->elf.tls_sec->vma;
8171 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8172 < (bfd_vma) 1 << 32);
8173 }
8174 }
8175
8176 r_type = ELF64_R_TYPE (rel->r_info);
8177 /* If this section has old-style __tls_get_addr calls
8178 without marker relocs, then check that each
8179 __tls_get_addr call reloc is preceded by a reloc
8180 that conceivably belongs to the __tls_get_addr arg
8181 setup insn. If we don't find matching arg setup
8182 relocs, don't do any tls optimization. */
8183 if (pass == 0
8184 && sec->has_tls_get_addr_call
8185 && h != NULL
8186 && (h == &htab->tls_get_addr->elf
8187 || h == &htab->tls_get_addr_fd->elf)
8188 && !found_tls_get_addr_arg
8189 && is_branch_reloc (r_type))
8190 {
8191 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8192 "TLS optimization disabled\n"),
8193 ibfd, sec, rel->r_offset);
8194 ret = TRUE;
8195 goto err_free_rel;
8196 }
8197
8198 found_tls_get_addr_arg = 0;
8199 switch (r_type)
8200 {
8201 case R_PPC64_GOT_TLSLD16:
8202 case R_PPC64_GOT_TLSLD16_LO:
8203 expecting_tls_get_addr = 1;
8204 found_tls_get_addr_arg = 1;
8205 /* Fall thru */
8206
8207 case R_PPC64_GOT_TLSLD16_HI:
8208 case R_PPC64_GOT_TLSLD16_HA:
8209 /* These relocs should never be against a symbol
8210 defined in a shared lib. Leave them alone if
8211 that turns out to be the case. */
8212 if (!is_local)
8213 continue;
8214
8215 /* LD -> LE */
8216 tls_set = 0;
8217 tls_clear = TLS_LD;
8218 tls_type = TLS_TLS | TLS_LD;
8219 break;
8220
8221 case R_PPC64_GOT_TLSGD16:
8222 case R_PPC64_GOT_TLSGD16_LO:
8223 expecting_tls_get_addr = 1;
8224 found_tls_get_addr_arg = 1;
8225 /* Fall thru */
8226
8227 case R_PPC64_GOT_TLSGD16_HI:
8228 case R_PPC64_GOT_TLSGD16_HA:
8229 if (ok_tprel)
8230 /* GD -> LE */
8231 tls_set = 0;
8232 else
8233 /* GD -> IE */
8234 tls_set = TLS_TLS | TLS_TPRELGD;
8235 tls_clear = TLS_GD;
8236 tls_type = TLS_TLS | TLS_GD;
8237 break;
8238
8239 case R_PPC64_GOT_TPREL16_DS:
8240 case R_PPC64_GOT_TPREL16_LO_DS:
8241 case R_PPC64_GOT_TPREL16_HI:
8242 case R_PPC64_GOT_TPREL16_HA:
8243 if (ok_tprel)
8244 {
8245 /* IE -> LE */
8246 tls_set = 0;
8247 tls_clear = TLS_TPREL;
8248 tls_type = TLS_TLS | TLS_TPREL;
8249 break;
8250 }
8251 continue;
8252
8253 case R_PPC64_TLSGD:
8254 case R_PPC64_TLSLD:
8255 found_tls_get_addr_arg = 1;
8256 /* Fall thru */
8257
8258 case R_PPC64_TLS:
8259 case R_PPC64_TOC16:
8260 case R_PPC64_TOC16_LO:
8261 if (sym_sec == NULL || sym_sec != toc)
8262 continue;
8263
8264 /* Mark this toc entry as referenced by a TLS
8265 code sequence. We can do that now in the
8266 case of R_PPC64_TLS, and after checking for
8267 tls_get_addr for the TOC16 relocs. */
8268 if (toc_ref == NULL)
8269 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8270 if (toc_ref == NULL)
8271 goto err_free_rel;
8272
8273 if (h != NULL)
8274 value = h->root.u.def.value;
8275 else
8276 value = sym->st_value;
8277 value += rel->r_addend;
8278 BFD_ASSERT (value < toc->size && value % 8 == 0);
8279 toc_ref_index = (value + toc->output_offset) / 8;
8280 if (r_type == R_PPC64_TLS
8281 || r_type == R_PPC64_TLSGD
8282 || r_type == R_PPC64_TLSLD)
8283 {
8284 toc_ref[toc_ref_index] = 1;
8285 continue;
8286 }
8287
8288 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8289 continue;
8290
8291 tls_set = 0;
8292 tls_clear = 0;
8293 expecting_tls_get_addr = 2;
8294 break;
8295
8296 case R_PPC64_TPREL64:
8297 if (pass == 0
8298 || sec != toc
8299 || toc_ref == NULL
8300 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8301 continue;
8302 if (ok_tprel)
8303 {
8304 /* IE -> LE */
8305 tls_set = TLS_EXPLICIT;
8306 tls_clear = TLS_TPREL;
8307 break;
8308 }
8309 continue;
8310
8311 case R_PPC64_DTPMOD64:
8312 if (pass == 0
8313 || sec != toc
8314 || toc_ref == NULL
8315 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8316 continue;
8317 if (rel + 1 < relend
8318 && (rel[1].r_info
8319 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8320 && rel[1].r_offset == rel->r_offset + 8)
8321 {
8322 if (ok_tprel)
8323 /* GD -> LE */
8324 tls_set = TLS_EXPLICIT | TLS_GD;
8325 else
8326 /* GD -> IE */
8327 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8328 tls_clear = TLS_GD;
8329 }
8330 else
8331 {
8332 if (!is_local)
8333 continue;
8334
8335 /* LD -> LE */
8336 tls_set = TLS_EXPLICIT;
8337 tls_clear = TLS_LD;
8338 }
8339 break;
8340
8341 default:
8342 continue;
8343 }
8344
8345 if (pass == 0)
8346 {
8347 if (!expecting_tls_get_addr
8348 || !sec->has_tls_get_addr_call)
8349 continue;
8350
8351 if (rel + 1 < relend
8352 && branch_reloc_hash_match (ibfd, rel + 1,
8353 htab->tls_get_addr,
8354 htab->tls_get_addr_fd))
8355 {
8356 if (expecting_tls_get_addr == 2)
8357 {
8358 /* Check for toc tls entries. */
8359 unsigned char *toc_tls;
8360 int retval;
8361
8362 retval = get_tls_mask (&toc_tls, NULL, NULL,
8363 &locsyms,
8364 rel, ibfd);
8365 if (retval == 0)
8366 goto err_free_rel;
8367 if (toc_tls != NULL)
8368 {
8369 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8370 found_tls_get_addr_arg = 1;
8371 if (retval > 1)
8372 toc_ref[toc_ref_index] = 1;
8373 }
8374 }
8375 continue;
8376 }
8377
8378 if (expecting_tls_get_addr != 1)
8379 continue;
8380
8381 /* Uh oh, we didn't find the expected call. We
8382 could just mark this symbol to exclude it
8383 from tls optimization but it's safer to skip
8384 the entire optimization. */
8385 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8386 "TLS optimization disabled\n"),
8387 ibfd, sec, rel->r_offset);
8388 ret = TRUE;
8389 goto err_free_rel;
8390 }
8391
8392 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8393 {
8394 struct plt_entry *ent;
8395 for (ent = htab->tls_get_addr->elf.plt.plist;
8396 ent != NULL;
8397 ent = ent->next)
8398 if (ent->addend == 0)
8399 {
8400 if (ent->plt.refcount > 0)
8401 {
8402 ent->plt.refcount -= 1;
8403 expecting_tls_get_addr = 0;
8404 }
8405 break;
8406 }
8407 }
8408
8409 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8410 {
8411 struct plt_entry *ent;
8412 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8413 ent != NULL;
8414 ent = ent->next)
8415 if (ent->addend == 0)
8416 {
8417 if (ent->plt.refcount > 0)
8418 ent->plt.refcount -= 1;
8419 break;
8420 }
8421 }
8422
8423 if (tls_clear == 0)
8424 continue;
8425
8426 if ((tls_set & TLS_EXPLICIT) == 0)
8427 {
8428 struct got_entry *ent;
8429
8430 /* Adjust got entry for this reloc. */
8431 if (h != NULL)
8432 ent = h->got.glist;
8433 else
8434 ent = elf_local_got_ents (ibfd)[r_symndx];
8435
8436 for (; ent != NULL; ent = ent->next)
8437 if (ent->addend == rel->r_addend
8438 && ent->owner == ibfd
8439 && ent->tls_type == tls_type)
8440 break;
8441 if (ent == NULL)
8442 abort ();
8443
8444 if (tls_set == 0)
8445 {
8446 /* We managed to get rid of a got entry. */
8447 if (ent->got.refcount > 0)
8448 ent->got.refcount -= 1;
8449 }
8450 }
8451 else
8452 {
8453 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8454 we'll lose one or two dyn relocs. */
8455 if (!dec_dynrel_count (rel->r_info, sec, info,
8456 NULL, h, sym))
8457 return FALSE;
8458
8459 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8460 {
8461 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8462 NULL, h, sym))
8463 return FALSE;
8464 }
8465 }
8466
8467 *tls_mask |= tls_set;
8468 *tls_mask &= ~tls_clear;
8469 }
8470
8471 if (elf_section_data (sec)->relocs != relstart)
8472 free (relstart);
8473 }
8474
8475 if (locsyms != NULL
8476 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8477 {
8478 if (!info->keep_memory)
8479 free (locsyms);
8480 else
8481 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8482 }
8483 }
8484
8485 if (toc_ref != NULL)
8486 free (toc_ref);
8487 return TRUE;
8488 }
8489
8490 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8491 the values of any global symbols in a toc section that has been
8492 edited. Globals in toc sections should be a rarity, so this function
8493 sets a flag if any are found in toc sections other than the one just
8494 edited, so that futher hash table traversals can be avoided. */
8495
8496 struct adjust_toc_info
8497 {
8498 asection *toc;
8499 unsigned long *skip;
8500 bfd_boolean global_toc_syms;
8501 };
8502
8503 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8504
8505 static bfd_boolean
8506 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8507 {
8508 struct ppc_link_hash_entry *eh;
8509 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8510 unsigned long i;
8511
8512 if (h->root.type != bfd_link_hash_defined
8513 && h->root.type != bfd_link_hash_defweak)
8514 return TRUE;
8515
8516 eh = (struct ppc_link_hash_entry *) h;
8517 if (eh->adjust_done)
8518 return TRUE;
8519
8520 if (eh->elf.root.u.def.section == toc_inf->toc)
8521 {
8522 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8523 i = toc_inf->toc->rawsize >> 3;
8524 else
8525 i = eh->elf.root.u.def.value >> 3;
8526
8527 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8528 {
8529 (*_bfd_error_handler)
8530 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8531 do
8532 ++i;
8533 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8534 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8535 }
8536
8537 eh->elf.root.u.def.value -= toc_inf->skip[i];
8538 eh->adjust_done = 1;
8539 }
8540 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8541 toc_inf->global_toc_syms = TRUE;
8542
8543 return TRUE;
8544 }
8545
8546 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8547
8548 static bfd_boolean
8549 ok_lo_toc_insn (unsigned int insn)
8550 {
8551 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8552 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8553 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8554 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8555 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8556 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8557 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8558 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8559 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8560 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8561 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8562 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8563 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8564 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8565 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8566 && (insn & 3) != 1)
8567 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8568 && ((insn & 3) == 0 || (insn & 3) == 3))
8569 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8570 }
8571
8572 /* Examine all relocs referencing .toc sections in order to remove
8573 unused .toc entries. */
8574
8575 bfd_boolean
8576 ppc64_elf_edit_toc (struct bfd_link_info *info)
8577 {
8578 bfd *ibfd;
8579 struct adjust_toc_info toc_inf;
8580 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8581
8582 htab->do_toc_opt = 1;
8583 toc_inf.global_toc_syms = TRUE;
8584 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8585 {
8586 asection *toc, *sec;
8587 Elf_Internal_Shdr *symtab_hdr;
8588 Elf_Internal_Sym *local_syms;
8589 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8590 unsigned long *skip, *drop;
8591 unsigned char *used;
8592 unsigned char *keep, last, some_unused;
8593
8594 if (!is_ppc64_elf (ibfd))
8595 continue;
8596
8597 toc = bfd_get_section_by_name (ibfd, ".toc");
8598 if (toc == NULL
8599 || toc->size == 0
8600 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8601 || discarded_section (toc))
8602 continue;
8603
8604 toc_relocs = NULL;
8605 local_syms = NULL;
8606 symtab_hdr = &elf_symtab_hdr (ibfd);
8607
8608 /* Look at sections dropped from the final link. */
8609 skip = NULL;
8610 relstart = NULL;
8611 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8612 {
8613 if (sec->reloc_count == 0
8614 || !discarded_section (sec)
8615 || get_opd_info (sec)
8616 || (sec->flags & SEC_ALLOC) == 0
8617 || (sec->flags & SEC_DEBUGGING) != 0)
8618 continue;
8619
8620 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8621 if (relstart == NULL)
8622 goto error_ret;
8623
8624 /* Run through the relocs to see which toc entries might be
8625 unused. */
8626 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8627 {
8628 enum elf_ppc64_reloc_type r_type;
8629 unsigned long r_symndx;
8630 asection *sym_sec;
8631 struct elf_link_hash_entry *h;
8632 Elf_Internal_Sym *sym;
8633 bfd_vma val;
8634
8635 r_type = ELF64_R_TYPE (rel->r_info);
8636 switch (r_type)
8637 {
8638 default:
8639 continue;
8640
8641 case R_PPC64_TOC16:
8642 case R_PPC64_TOC16_LO:
8643 case R_PPC64_TOC16_HI:
8644 case R_PPC64_TOC16_HA:
8645 case R_PPC64_TOC16_DS:
8646 case R_PPC64_TOC16_LO_DS:
8647 break;
8648 }
8649
8650 r_symndx = ELF64_R_SYM (rel->r_info);
8651 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8652 r_symndx, ibfd))
8653 goto error_ret;
8654
8655 if (sym_sec != toc)
8656 continue;
8657
8658 if (h != NULL)
8659 val = h->root.u.def.value;
8660 else
8661 val = sym->st_value;
8662 val += rel->r_addend;
8663
8664 if (val >= toc->size)
8665 continue;
8666
8667 /* Anything in the toc ought to be aligned to 8 bytes.
8668 If not, don't mark as unused. */
8669 if (val & 7)
8670 continue;
8671
8672 if (skip == NULL)
8673 {
8674 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8675 if (skip == NULL)
8676 goto error_ret;
8677 }
8678
8679 skip[val >> 3] = ref_from_discarded;
8680 }
8681
8682 if (elf_section_data (sec)->relocs != relstart)
8683 free (relstart);
8684 }
8685
8686 /* For largetoc loads of address constants, we can convert
8687 . addis rx,2,addr@got@ha
8688 . ld ry,addr@got@l(rx)
8689 to
8690 . addis rx,2,addr@toc@ha
8691 . addi ry,rx,addr@toc@l
8692 when addr is within 2G of the toc pointer. This then means
8693 that the word storing "addr" in the toc is no longer needed. */
8694
8695 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8696 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8697 && toc->reloc_count != 0)
8698 {
8699 /* Read toc relocs. */
8700 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8701 info->keep_memory);
8702 if (toc_relocs == NULL)
8703 goto error_ret;
8704
8705 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8706 {
8707 enum elf_ppc64_reloc_type r_type;
8708 unsigned long r_symndx;
8709 asection *sym_sec;
8710 struct elf_link_hash_entry *h;
8711 Elf_Internal_Sym *sym;
8712 bfd_vma val, addr;
8713
8714 r_type = ELF64_R_TYPE (rel->r_info);
8715 if (r_type != R_PPC64_ADDR64)
8716 continue;
8717
8718 r_symndx = ELF64_R_SYM (rel->r_info);
8719 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8720 r_symndx, ibfd))
8721 goto error_ret;
8722
8723 if (sym_sec == NULL
8724 || discarded_section (sym_sec))
8725 continue;
8726
8727 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8728 continue;
8729
8730 if (h != NULL)
8731 {
8732 if (h->type == STT_GNU_IFUNC)
8733 continue;
8734 val = h->root.u.def.value;
8735 }
8736 else
8737 {
8738 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8739 continue;
8740 val = sym->st_value;
8741 }
8742 val += rel->r_addend;
8743 val += sym_sec->output_section->vma + sym_sec->output_offset;
8744
8745 /* We don't yet know the exact toc pointer value, but we
8746 know it will be somewhere in the toc section. Don't
8747 optimize if the difference from any possible toc
8748 pointer is outside [ff..f80008000, 7fff7fff]. */
8749 addr = toc->output_section->vma + TOC_BASE_OFF;
8750 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8751 continue;
8752
8753 addr = toc->output_section->vma + toc->output_section->rawsize;
8754 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8755 continue;
8756
8757 if (skip == NULL)
8758 {
8759 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8760 if (skip == NULL)
8761 goto error_ret;
8762 }
8763
8764 skip[rel->r_offset >> 3]
8765 |= can_optimize | ((rel - toc_relocs) << 2);
8766 }
8767 }
8768
8769 if (skip == NULL)
8770 continue;
8771
8772 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8773 if (used == NULL)
8774 {
8775 error_ret:
8776 if (local_syms != NULL
8777 && symtab_hdr->contents != (unsigned char *) local_syms)
8778 free (local_syms);
8779 if (sec != NULL
8780 && relstart != NULL
8781 && elf_section_data (sec)->relocs != relstart)
8782 free (relstart);
8783 if (toc_relocs != NULL
8784 && elf_section_data (toc)->relocs != toc_relocs)
8785 free (toc_relocs);
8786 if (skip != NULL)
8787 free (skip);
8788 return FALSE;
8789 }
8790
8791 /* Now check all kept sections that might reference the toc.
8792 Check the toc itself last. */
8793 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8794 : ibfd->sections);
8795 sec != NULL;
8796 sec = (sec == toc ? NULL
8797 : sec->next == NULL ? toc
8798 : sec->next == toc && toc->next ? toc->next
8799 : sec->next))
8800 {
8801 int repeat;
8802
8803 if (sec->reloc_count == 0
8804 || discarded_section (sec)
8805 || get_opd_info (sec)
8806 || (sec->flags & SEC_ALLOC) == 0
8807 || (sec->flags & SEC_DEBUGGING) != 0)
8808 continue;
8809
8810 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8811 info->keep_memory);
8812 if (relstart == NULL)
8813 {
8814 free (used);
8815 goto error_ret;
8816 }
8817
8818 /* Mark toc entries referenced as used. */
8819 do
8820 {
8821 repeat = 0;
8822 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8823 {
8824 enum elf_ppc64_reloc_type r_type;
8825 unsigned long r_symndx;
8826 asection *sym_sec;
8827 struct elf_link_hash_entry *h;
8828 Elf_Internal_Sym *sym;
8829 bfd_vma val;
8830 enum {no_check, check_lo, check_ha} insn_check;
8831
8832 r_type = ELF64_R_TYPE (rel->r_info);
8833 switch (r_type)
8834 {
8835 default:
8836 insn_check = no_check;
8837 break;
8838
8839 case R_PPC64_GOT_TLSLD16_HA:
8840 case R_PPC64_GOT_TLSGD16_HA:
8841 case R_PPC64_GOT_TPREL16_HA:
8842 case R_PPC64_GOT_DTPREL16_HA:
8843 case R_PPC64_GOT16_HA:
8844 case R_PPC64_TOC16_HA:
8845 insn_check = check_ha;
8846 break;
8847
8848 case R_PPC64_GOT_TLSLD16_LO:
8849 case R_PPC64_GOT_TLSGD16_LO:
8850 case R_PPC64_GOT_TPREL16_LO_DS:
8851 case R_PPC64_GOT_DTPREL16_LO_DS:
8852 case R_PPC64_GOT16_LO:
8853 case R_PPC64_GOT16_LO_DS:
8854 case R_PPC64_TOC16_LO:
8855 case R_PPC64_TOC16_LO_DS:
8856 insn_check = check_lo;
8857 break;
8858 }
8859
8860 if (insn_check != no_check)
8861 {
8862 bfd_vma off = rel->r_offset & ~3;
8863 unsigned char buf[4];
8864 unsigned int insn;
8865
8866 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8867 {
8868 free (used);
8869 goto error_ret;
8870 }
8871 insn = bfd_get_32 (ibfd, buf);
8872 if (insn_check == check_lo
8873 ? !ok_lo_toc_insn (insn)
8874 : ((insn & ((0x3f << 26) | 0x1f << 16))
8875 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8876 {
8877 char str[12];
8878
8879 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8880 sprintf (str, "%#08x", insn);
8881 info->callbacks->einfo
8882 (_("%P: %H: toc optimization is not supported for"
8883 " %s instruction.\n"),
8884 ibfd, sec, rel->r_offset & ~3, str);
8885 }
8886 }
8887
8888 switch (r_type)
8889 {
8890 case R_PPC64_TOC16:
8891 case R_PPC64_TOC16_LO:
8892 case R_PPC64_TOC16_HI:
8893 case R_PPC64_TOC16_HA:
8894 case R_PPC64_TOC16_DS:
8895 case R_PPC64_TOC16_LO_DS:
8896 /* In case we're taking addresses of toc entries. */
8897 case R_PPC64_ADDR64:
8898 break;
8899
8900 default:
8901 continue;
8902 }
8903
8904 r_symndx = ELF64_R_SYM (rel->r_info);
8905 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8906 r_symndx, ibfd))
8907 {
8908 free (used);
8909 goto error_ret;
8910 }
8911
8912 if (sym_sec != toc)
8913 continue;
8914
8915 if (h != NULL)
8916 val = h->root.u.def.value;
8917 else
8918 val = sym->st_value;
8919 val += rel->r_addend;
8920
8921 if (val >= toc->size)
8922 continue;
8923
8924 if ((skip[val >> 3] & can_optimize) != 0)
8925 {
8926 bfd_vma off;
8927 unsigned char opc;
8928
8929 switch (r_type)
8930 {
8931 case R_PPC64_TOC16_HA:
8932 break;
8933
8934 case R_PPC64_TOC16_LO_DS:
8935 off = rel->r_offset;
8936 off += (bfd_big_endian (ibfd) ? -2 : 3);
8937 if (!bfd_get_section_contents (ibfd, sec, &opc,
8938 off, 1))
8939 {
8940 free (used);
8941 goto error_ret;
8942 }
8943 if ((opc & (0x3f << 2)) == (58u << 2))
8944 break;
8945 /* Fall thru */
8946
8947 default:
8948 /* Wrong sort of reloc, or not a ld. We may
8949 as well clear ref_from_discarded too. */
8950 skip[val >> 3] = 0;
8951 }
8952 }
8953
8954 if (sec != toc)
8955 used[val >> 3] = 1;
8956 /* For the toc section, we only mark as used if this
8957 entry itself isn't unused. */
8958 else if ((used[rel->r_offset >> 3]
8959 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8960 && !used[val >> 3])
8961 {
8962 /* Do all the relocs again, to catch reference
8963 chains. */
8964 repeat = 1;
8965 used[val >> 3] = 1;
8966 }
8967 }
8968 }
8969 while (repeat);
8970
8971 if (elf_section_data (sec)->relocs != relstart)
8972 free (relstart);
8973 }
8974
8975 /* Merge the used and skip arrays. Assume that TOC
8976 doublewords not appearing as either used or unused belong
8977 to to an entry more than one doubleword in size. */
8978 for (drop = skip, keep = used, last = 0, some_unused = 0;
8979 drop < skip + (toc->size + 7) / 8;
8980 ++drop, ++keep)
8981 {
8982 if (*keep)
8983 {
8984 *drop &= ~ref_from_discarded;
8985 if ((*drop & can_optimize) != 0)
8986 some_unused = 1;
8987 last = 0;
8988 }
8989 else if ((*drop & ref_from_discarded) != 0)
8990 {
8991 some_unused = 1;
8992 last = ref_from_discarded;
8993 }
8994 else
8995 *drop = last;
8996 }
8997
8998 free (used);
8999
9000 if (some_unused)
9001 {
9002 bfd_byte *contents, *src;
9003 unsigned long off;
9004 Elf_Internal_Sym *sym;
9005 bfd_boolean local_toc_syms = FALSE;
9006
9007 /* Shuffle the toc contents, and at the same time convert the
9008 skip array from booleans into offsets. */
9009 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9010 goto error_ret;
9011
9012 elf_section_data (toc)->this_hdr.contents = contents;
9013
9014 for (src = contents, off = 0, drop = skip;
9015 src < contents + toc->size;
9016 src += 8, ++drop)
9017 {
9018 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9019 off += 8;
9020 else if (off != 0)
9021 {
9022 *drop = off;
9023 memcpy (src - off, src, 8);
9024 }
9025 }
9026 *drop = off;
9027 toc->rawsize = toc->size;
9028 toc->size = src - contents - off;
9029
9030 /* Adjust addends for relocs against the toc section sym,
9031 and optimize any accesses we can. */
9032 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9033 {
9034 if (sec->reloc_count == 0
9035 || discarded_section (sec))
9036 continue;
9037
9038 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9039 info->keep_memory);
9040 if (relstart == NULL)
9041 goto error_ret;
9042
9043 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9044 {
9045 enum elf_ppc64_reloc_type r_type;
9046 unsigned long r_symndx;
9047 asection *sym_sec;
9048 struct elf_link_hash_entry *h;
9049 bfd_vma val;
9050
9051 r_type = ELF64_R_TYPE (rel->r_info);
9052 switch (r_type)
9053 {
9054 default:
9055 continue;
9056
9057 case R_PPC64_TOC16:
9058 case R_PPC64_TOC16_LO:
9059 case R_PPC64_TOC16_HI:
9060 case R_PPC64_TOC16_HA:
9061 case R_PPC64_TOC16_DS:
9062 case R_PPC64_TOC16_LO_DS:
9063 case R_PPC64_ADDR64:
9064 break;
9065 }
9066
9067 r_symndx = ELF64_R_SYM (rel->r_info);
9068 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9069 r_symndx, ibfd))
9070 goto error_ret;
9071
9072 if (sym_sec != toc)
9073 continue;
9074
9075 if (h != NULL)
9076 val = h->root.u.def.value;
9077 else
9078 {
9079 val = sym->st_value;
9080 if (val != 0)
9081 local_toc_syms = TRUE;
9082 }
9083
9084 val += rel->r_addend;
9085
9086 if (val > toc->rawsize)
9087 val = toc->rawsize;
9088 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9089 continue;
9090 else if ((skip[val >> 3] & can_optimize) != 0)
9091 {
9092 Elf_Internal_Rela *tocrel
9093 = toc_relocs + (skip[val >> 3] >> 2);
9094 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9095
9096 switch (r_type)
9097 {
9098 case R_PPC64_TOC16_HA:
9099 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9100 break;
9101
9102 case R_PPC64_TOC16_LO_DS:
9103 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9104 break;
9105
9106 default:
9107 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9108 ppc_howto_init ();
9109 info->callbacks->einfo
9110 (_("%P: %H: %s references "
9111 "optimized away TOC entry\n"),
9112 ibfd, sec, rel->r_offset,
9113 ppc64_elf_howto_table[r_type]->name);
9114 bfd_set_error (bfd_error_bad_value);
9115 goto error_ret;
9116 }
9117 rel->r_addend = tocrel->r_addend;
9118 elf_section_data (sec)->relocs = relstart;
9119 continue;
9120 }
9121
9122 if (h != NULL || sym->st_value != 0)
9123 continue;
9124
9125 rel->r_addend -= skip[val >> 3];
9126 elf_section_data (sec)->relocs = relstart;
9127 }
9128
9129 if (elf_section_data (sec)->relocs != relstart)
9130 free (relstart);
9131 }
9132
9133 /* We shouldn't have local or global symbols defined in the TOC,
9134 but handle them anyway. */
9135 if (local_syms != NULL)
9136 for (sym = local_syms;
9137 sym < local_syms + symtab_hdr->sh_info;
9138 ++sym)
9139 if (sym->st_value != 0
9140 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9141 {
9142 unsigned long i;
9143
9144 if (sym->st_value > toc->rawsize)
9145 i = toc->rawsize >> 3;
9146 else
9147 i = sym->st_value >> 3;
9148
9149 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9150 {
9151 if (local_toc_syms)
9152 (*_bfd_error_handler)
9153 (_("%s defined on removed toc entry"),
9154 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9155 do
9156 ++i;
9157 while ((skip[i] & (ref_from_discarded | can_optimize)));
9158 sym->st_value = (bfd_vma) i << 3;
9159 }
9160
9161 sym->st_value -= skip[i];
9162 symtab_hdr->contents = (unsigned char *) local_syms;
9163 }
9164
9165 /* Adjust any global syms defined in this toc input section. */
9166 if (toc_inf.global_toc_syms)
9167 {
9168 toc_inf.toc = toc;
9169 toc_inf.skip = skip;
9170 toc_inf.global_toc_syms = FALSE;
9171 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9172 &toc_inf);
9173 }
9174
9175 if (toc->reloc_count != 0)
9176 {
9177 Elf_Internal_Shdr *rel_hdr;
9178 Elf_Internal_Rela *wrel;
9179 bfd_size_type sz;
9180
9181 /* Remove unused toc relocs, and adjust those we keep. */
9182 if (toc_relocs == NULL)
9183 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9184 info->keep_memory);
9185 if (toc_relocs == NULL)
9186 goto error_ret;
9187
9188 wrel = toc_relocs;
9189 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9190 if ((skip[rel->r_offset >> 3]
9191 & (ref_from_discarded | can_optimize)) == 0)
9192 {
9193 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9194 wrel->r_info = rel->r_info;
9195 wrel->r_addend = rel->r_addend;
9196 ++wrel;
9197 }
9198 else if (!dec_dynrel_count (rel->r_info, toc, info,
9199 &local_syms, NULL, NULL))
9200 goto error_ret;
9201
9202 elf_section_data (toc)->relocs = toc_relocs;
9203 toc->reloc_count = wrel - toc_relocs;
9204 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9205 sz = rel_hdr->sh_entsize;
9206 rel_hdr->sh_size = toc->reloc_count * sz;
9207 }
9208 }
9209 else if (toc_relocs != NULL
9210 && elf_section_data (toc)->relocs != toc_relocs)
9211 free (toc_relocs);
9212
9213 if (local_syms != NULL
9214 && symtab_hdr->contents != (unsigned char *) local_syms)
9215 {
9216 if (!info->keep_memory)
9217 free (local_syms);
9218 else
9219 symtab_hdr->contents = (unsigned char *) local_syms;
9220 }
9221 free (skip);
9222 }
9223
9224 return TRUE;
9225 }
9226
9227 /* Return true iff input section I references the TOC using
9228 instructions limited to +/-32k offsets. */
9229
9230 bfd_boolean
9231 ppc64_elf_has_small_toc_reloc (asection *i)
9232 {
9233 return (is_ppc64_elf (i->owner)
9234 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9235 }
9236
9237 /* Allocate space for one GOT entry. */
9238
9239 static void
9240 allocate_got (struct elf_link_hash_entry *h,
9241 struct bfd_link_info *info,
9242 struct got_entry *gent)
9243 {
9244 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9245 bfd_boolean dyn;
9246 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9247 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9248 ? 16 : 8);
9249 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9250 ? 2 : 1) * sizeof (Elf64_External_Rela);
9251 asection *got = ppc64_elf_tdata (gent->owner)->got;
9252
9253 gent->got.offset = got->size;
9254 got->size += entsize;
9255
9256 dyn = htab->elf.dynamic_sections_created;
9257 if (h->type == STT_GNU_IFUNC)
9258 {
9259 htab->elf.irelplt->size += rentsize;
9260 htab->got_reli_size += rentsize;
9261 }
9262 else if ((info->shared
9263 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9264 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9265 || h->root.type != bfd_link_hash_undefweak))
9266 {
9267 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9268 relgot->size += rentsize;
9269 }
9270 }
9271
9272 /* This function merges got entries in the same toc group. */
9273
9274 static void
9275 merge_got_entries (struct got_entry **pent)
9276 {
9277 struct got_entry *ent, *ent2;
9278
9279 for (ent = *pent; ent != NULL; ent = ent->next)
9280 if (!ent->is_indirect)
9281 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9282 if (!ent2->is_indirect
9283 && ent2->addend == ent->addend
9284 && ent2->tls_type == ent->tls_type
9285 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9286 {
9287 ent2->is_indirect = TRUE;
9288 ent2->got.ent = ent;
9289 }
9290 }
9291
9292 /* Allocate space in .plt, .got and associated reloc sections for
9293 dynamic relocs. */
9294
9295 static bfd_boolean
9296 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9297 {
9298 struct bfd_link_info *info;
9299 struct ppc_link_hash_table *htab;
9300 asection *s;
9301 struct ppc_link_hash_entry *eh;
9302 struct elf_dyn_relocs *p;
9303 struct got_entry **pgent, *gent;
9304
9305 if (h->root.type == bfd_link_hash_indirect)
9306 return TRUE;
9307
9308 info = (struct bfd_link_info *) inf;
9309 htab = ppc_hash_table (info);
9310 if (htab == NULL)
9311 return FALSE;
9312
9313 if ((htab->elf.dynamic_sections_created
9314 && h->dynindx != -1
9315 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
9316 || h->type == STT_GNU_IFUNC)
9317 {
9318 struct plt_entry *pent;
9319 bfd_boolean doneone = FALSE;
9320 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9321 if (pent->plt.refcount > 0)
9322 {
9323 if (!htab->elf.dynamic_sections_created
9324 || h->dynindx == -1)
9325 {
9326 s = htab->elf.iplt;
9327 pent->plt.offset = s->size;
9328 s->size += PLT_ENTRY_SIZE (htab);
9329 s = htab->elf.irelplt;
9330 }
9331 else
9332 {
9333 /* If this is the first .plt entry, make room for the special
9334 first entry. */
9335 s = htab->elf.splt;
9336 if (s->size == 0)
9337 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9338
9339 pent->plt.offset = s->size;
9340
9341 /* Make room for this entry. */
9342 s->size += PLT_ENTRY_SIZE (htab);
9343
9344 /* Make room for the .glink code. */
9345 s = htab->glink;
9346 if (s->size == 0)
9347 s->size += GLINK_CALL_STUB_SIZE;
9348 if (htab->opd_abi)
9349 {
9350 /* We need bigger stubs past index 32767. */
9351 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9352 s->size += 4;
9353 s->size += 2*4;
9354 }
9355 else
9356 s->size += 4;
9357
9358 /* We also need to make an entry in the .rela.plt section. */
9359 s = htab->elf.srelplt;
9360 }
9361 s->size += sizeof (Elf64_External_Rela);
9362 doneone = TRUE;
9363 }
9364 else
9365 pent->plt.offset = (bfd_vma) -1;
9366 if (!doneone)
9367 {
9368 h->plt.plist = NULL;
9369 h->needs_plt = 0;
9370 }
9371 }
9372 else
9373 {
9374 h->plt.plist = NULL;
9375 h->needs_plt = 0;
9376 }
9377
9378 eh = (struct ppc_link_hash_entry *) h;
9379 /* Run through the TLS GD got entries first if we're changing them
9380 to TPREL. */
9381 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9382 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9383 if (gent->got.refcount > 0
9384 && (gent->tls_type & TLS_GD) != 0)
9385 {
9386 /* This was a GD entry that has been converted to TPREL. If
9387 there happens to be a TPREL entry we can use that one. */
9388 struct got_entry *ent;
9389 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9390 if (ent->got.refcount > 0
9391 && (ent->tls_type & TLS_TPREL) != 0
9392 && ent->addend == gent->addend
9393 && ent->owner == gent->owner)
9394 {
9395 gent->got.refcount = 0;
9396 break;
9397 }
9398
9399 /* If not, then we'll be using our own TPREL entry. */
9400 if (gent->got.refcount != 0)
9401 gent->tls_type = TLS_TLS | TLS_TPREL;
9402 }
9403
9404 /* Remove any list entry that won't generate a word in the GOT before
9405 we call merge_got_entries. Otherwise we risk merging to empty
9406 entries. */
9407 pgent = &h->got.glist;
9408 while ((gent = *pgent) != NULL)
9409 if (gent->got.refcount > 0)
9410 {
9411 if ((gent->tls_type & TLS_LD) != 0
9412 && !h->def_dynamic)
9413 {
9414 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9415 *pgent = gent->next;
9416 }
9417 else
9418 pgent = &gent->next;
9419 }
9420 else
9421 *pgent = gent->next;
9422
9423 if (!htab->do_multi_toc)
9424 merge_got_entries (&h->got.glist);
9425
9426 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9427 if (!gent->is_indirect)
9428 {
9429 /* Make sure this symbol is output as a dynamic symbol.
9430 Undefined weak syms won't yet be marked as dynamic,
9431 nor will all TLS symbols. */
9432 if (h->dynindx == -1
9433 && !h->forced_local
9434 && h->type != STT_GNU_IFUNC
9435 && htab->elf.dynamic_sections_created)
9436 {
9437 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9438 return FALSE;
9439 }
9440
9441 if (!is_ppc64_elf (gent->owner))
9442 abort ();
9443
9444 allocate_got (h, info, gent);
9445 }
9446
9447 if (eh->dyn_relocs == NULL
9448 || (!htab->elf.dynamic_sections_created
9449 && h->type != STT_GNU_IFUNC))
9450 return TRUE;
9451
9452 /* In the shared -Bsymbolic case, discard space allocated for
9453 dynamic pc-relative relocs against symbols which turn out to be
9454 defined in regular objects. For the normal shared case, discard
9455 space for relocs that have become local due to symbol visibility
9456 changes. */
9457
9458 if (info->shared)
9459 {
9460 /* Relocs that use pc_count are those that appear on a call insn,
9461 or certain REL relocs (see must_be_dyn_reloc) that can be
9462 generated via assembly. We want calls to protected symbols to
9463 resolve directly to the function rather than going via the plt.
9464 If people want function pointer comparisons to work as expected
9465 then they should avoid writing weird assembly. */
9466 if (SYMBOL_CALLS_LOCAL (info, h))
9467 {
9468 struct elf_dyn_relocs **pp;
9469
9470 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9471 {
9472 p->count -= p->pc_count;
9473 p->pc_count = 0;
9474 if (p->count == 0)
9475 *pp = p->next;
9476 else
9477 pp = &p->next;
9478 }
9479 }
9480
9481 /* Also discard relocs on undefined weak syms with non-default
9482 visibility. */
9483 if (eh->dyn_relocs != NULL
9484 && h->root.type == bfd_link_hash_undefweak)
9485 {
9486 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9487 eh->dyn_relocs = NULL;
9488
9489 /* Make sure this symbol is output as a dynamic symbol.
9490 Undefined weak syms won't yet be marked as dynamic. */
9491 else if (h->dynindx == -1
9492 && !h->forced_local)
9493 {
9494 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9495 return FALSE;
9496 }
9497 }
9498 }
9499 else if (h->type == STT_GNU_IFUNC)
9500 {
9501 if (!h->non_got_ref)
9502 eh->dyn_relocs = NULL;
9503 }
9504 else if (ELIMINATE_COPY_RELOCS)
9505 {
9506 /* For the non-shared case, discard space for relocs against
9507 symbols which turn out to need copy relocs or are not
9508 dynamic. */
9509
9510 if (!h->non_got_ref
9511 && !h->def_regular)
9512 {
9513 /* Make sure this symbol is output as a dynamic symbol.
9514 Undefined weak syms won't yet be marked as dynamic. */
9515 if (h->dynindx == -1
9516 && !h->forced_local)
9517 {
9518 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9519 return FALSE;
9520 }
9521
9522 /* If that succeeded, we know we'll be keeping all the
9523 relocs. */
9524 if (h->dynindx != -1)
9525 goto keep;
9526 }
9527
9528 eh->dyn_relocs = NULL;
9529
9530 keep: ;
9531 }
9532
9533 /* Finally, allocate space. */
9534 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9535 {
9536 asection *sreloc = elf_section_data (p->sec)->sreloc;
9537 if (eh->elf.type == STT_GNU_IFUNC)
9538 sreloc = htab->elf.irelplt;
9539 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9540 }
9541
9542 return TRUE;
9543 }
9544
9545 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9546 to set up space for global entry stubs. These are put in glink,
9547 after the branch table. */
9548
9549 static bfd_boolean
9550 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9551 {
9552 struct bfd_link_info *info;
9553 struct ppc_link_hash_table *htab;
9554 struct plt_entry *pent;
9555 asection *s;
9556
9557 if (h->root.type == bfd_link_hash_indirect)
9558 return TRUE;
9559
9560 if (!h->pointer_equality_needed)
9561 return TRUE;
9562
9563 if (h->def_regular)
9564 return TRUE;
9565
9566 info = inf;
9567 htab = ppc_hash_table (info);
9568 if (htab == NULL)
9569 return FALSE;
9570
9571 s = htab->glink;
9572 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9573 if (pent->plt.offset != (bfd_vma) -1
9574 && pent->addend == 0)
9575 {
9576 /* For ELFv2, if this symbol is not defined in a regular file
9577 and we are not generating a shared library or pie, then we
9578 need to define the symbol in the executable on a call stub.
9579 This is to avoid text relocations. */
9580 s->size = (s->size + 15) & -16;
9581 h->root.u.def.section = s;
9582 h->root.u.def.value = s->size;
9583 s->size += 16;
9584 break;
9585 }
9586 return TRUE;
9587 }
9588
9589 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9590 read-only sections. */
9591
9592 static bfd_boolean
9593 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9594 {
9595 if (h->root.type == bfd_link_hash_indirect)
9596 return TRUE;
9597
9598 if (readonly_dynrelocs (h))
9599 {
9600 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9601
9602 /* Not an error, just cut short the traversal. */
9603 return FALSE;
9604 }
9605 return TRUE;
9606 }
9607
9608 /* Set the sizes of the dynamic sections. */
9609
9610 static bfd_boolean
9611 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9612 struct bfd_link_info *info)
9613 {
9614 struct ppc_link_hash_table *htab;
9615 bfd *dynobj;
9616 asection *s;
9617 bfd_boolean relocs;
9618 bfd *ibfd;
9619 struct got_entry *first_tlsld;
9620
9621 htab = ppc_hash_table (info);
9622 if (htab == NULL)
9623 return FALSE;
9624
9625 dynobj = htab->elf.dynobj;
9626 if (dynobj == NULL)
9627 abort ();
9628
9629 if (htab->elf.dynamic_sections_created)
9630 {
9631 /* Set the contents of the .interp section to the interpreter. */
9632 if (info->executable)
9633 {
9634 s = bfd_get_linker_section (dynobj, ".interp");
9635 if (s == NULL)
9636 abort ();
9637 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9638 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9639 }
9640 }
9641
9642 /* Set up .got offsets for local syms, and space for local dynamic
9643 relocs. */
9644 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9645 {
9646 struct got_entry **lgot_ents;
9647 struct got_entry **end_lgot_ents;
9648 struct plt_entry **local_plt;
9649 struct plt_entry **end_local_plt;
9650 unsigned char *lgot_masks;
9651 bfd_size_type locsymcount;
9652 Elf_Internal_Shdr *symtab_hdr;
9653
9654 if (!is_ppc64_elf (ibfd))
9655 continue;
9656
9657 for (s = ibfd->sections; s != NULL; s = s->next)
9658 {
9659 struct ppc_dyn_relocs *p;
9660
9661 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9662 {
9663 if (!bfd_is_abs_section (p->sec)
9664 && bfd_is_abs_section (p->sec->output_section))
9665 {
9666 /* Input section has been discarded, either because
9667 it is a copy of a linkonce section or due to
9668 linker script /DISCARD/, so we'll be discarding
9669 the relocs too. */
9670 }
9671 else if (p->count != 0)
9672 {
9673 asection *srel = elf_section_data (p->sec)->sreloc;
9674 if (p->ifunc)
9675 srel = htab->elf.irelplt;
9676 srel->size += p->count * sizeof (Elf64_External_Rela);
9677 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9678 info->flags |= DF_TEXTREL;
9679 }
9680 }
9681 }
9682
9683 lgot_ents = elf_local_got_ents (ibfd);
9684 if (!lgot_ents)
9685 continue;
9686
9687 symtab_hdr = &elf_symtab_hdr (ibfd);
9688 locsymcount = symtab_hdr->sh_info;
9689 end_lgot_ents = lgot_ents + locsymcount;
9690 local_plt = (struct plt_entry **) end_lgot_ents;
9691 end_local_plt = local_plt + locsymcount;
9692 lgot_masks = (unsigned char *) end_local_plt;
9693 s = ppc64_elf_tdata (ibfd)->got;
9694 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9695 {
9696 struct got_entry **pent, *ent;
9697
9698 pent = lgot_ents;
9699 while ((ent = *pent) != NULL)
9700 if (ent->got.refcount > 0)
9701 {
9702 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9703 {
9704 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9705 *pent = ent->next;
9706 }
9707 else
9708 {
9709 unsigned int ent_size = 8;
9710 unsigned int rel_size = sizeof (Elf64_External_Rela);
9711
9712 ent->got.offset = s->size;
9713 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9714 {
9715 ent_size *= 2;
9716 rel_size *= 2;
9717 }
9718 s->size += ent_size;
9719 if ((*lgot_masks & PLT_IFUNC) != 0)
9720 {
9721 htab->elf.irelplt->size += rel_size;
9722 htab->got_reli_size += rel_size;
9723 }
9724 else if (info->shared)
9725 {
9726 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9727 srel->size += rel_size;
9728 }
9729 pent = &ent->next;
9730 }
9731 }
9732 else
9733 *pent = ent->next;
9734 }
9735
9736 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9737 for (; local_plt < end_local_plt; ++local_plt)
9738 {
9739 struct plt_entry *ent;
9740
9741 for (ent = *local_plt; ent != NULL; ent = ent->next)
9742 if (ent->plt.refcount > 0)
9743 {
9744 s = htab->elf.iplt;
9745 ent->plt.offset = s->size;
9746 s->size += PLT_ENTRY_SIZE (htab);
9747
9748 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9749 }
9750 else
9751 ent->plt.offset = (bfd_vma) -1;
9752 }
9753 }
9754
9755 /* Allocate global sym .plt and .got entries, and space for global
9756 sym dynamic relocs. */
9757 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9758 /* Stash the end of glink branch table. */
9759 if (htab->glink != NULL)
9760 htab->glink->rawsize = htab->glink->size;
9761
9762 if (!htab->opd_abi && !info->shared)
9763 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
9764
9765 first_tlsld = NULL;
9766 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9767 {
9768 struct got_entry *ent;
9769
9770 if (!is_ppc64_elf (ibfd))
9771 continue;
9772
9773 ent = ppc64_tlsld_got (ibfd);
9774 if (ent->got.refcount > 0)
9775 {
9776 if (!htab->do_multi_toc && first_tlsld != NULL)
9777 {
9778 ent->is_indirect = TRUE;
9779 ent->got.ent = first_tlsld;
9780 }
9781 else
9782 {
9783 if (first_tlsld == NULL)
9784 first_tlsld = ent;
9785 s = ppc64_elf_tdata (ibfd)->got;
9786 ent->got.offset = s->size;
9787 ent->owner = ibfd;
9788 s->size += 16;
9789 if (info->shared)
9790 {
9791 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9792 srel->size += sizeof (Elf64_External_Rela);
9793 }
9794 }
9795 }
9796 else
9797 ent->got.offset = (bfd_vma) -1;
9798 }
9799
9800 /* We now have determined the sizes of the various dynamic sections.
9801 Allocate memory for them. */
9802 relocs = FALSE;
9803 for (s = dynobj->sections; s != NULL; s = s->next)
9804 {
9805 if ((s->flags & SEC_LINKER_CREATED) == 0)
9806 continue;
9807
9808 if (s == htab->brlt || s == htab->relbrlt)
9809 /* These haven't been allocated yet; don't strip. */
9810 continue;
9811 else if (s == htab->elf.sgot
9812 || s == htab->elf.splt
9813 || s == htab->elf.iplt
9814 || s == htab->glink
9815 || s == htab->dynbss)
9816 {
9817 /* Strip this section if we don't need it; see the
9818 comment below. */
9819 }
9820 else if (s == htab->glink_eh_frame)
9821 {
9822 if (!bfd_is_abs_section (s->output_section))
9823 /* Not sized yet. */
9824 continue;
9825 }
9826 else if (CONST_STRNEQ (s->name, ".rela"))
9827 {
9828 if (s->size != 0)
9829 {
9830 if (s != htab->elf.srelplt)
9831 relocs = TRUE;
9832
9833 /* We use the reloc_count field as a counter if we need
9834 to copy relocs into the output file. */
9835 s->reloc_count = 0;
9836 }
9837 }
9838 else
9839 {
9840 /* It's not one of our sections, so don't allocate space. */
9841 continue;
9842 }
9843
9844 if (s->size == 0)
9845 {
9846 /* If we don't need this section, strip it from the
9847 output file. This is mostly to handle .rela.bss and
9848 .rela.plt. We must create both sections in
9849 create_dynamic_sections, because they must be created
9850 before the linker maps input sections to output
9851 sections. The linker does that before
9852 adjust_dynamic_symbol is called, and it is that
9853 function which decides whether anything needs to go
9854 into these sections. */
9855 s->flags |= SEC_EXCLUDE;
9856 continue;
9857 }
9858
9859 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9860 continue;
9861
9862 /* Allocate memory for the section contents. We use bfd_zalloc
9863 here in case unused entries are not reclaimed before the
9864 section's contents are written out. This should not happen,
9865 but this way if it does we get a R_PPC64_NONE reloc in .rela
9866 sections instead of garbage.
9867 We also rely on the section contents being zero when writing
9868 the GOT. */
9869 s->contents = bfd_zalloc (dynobj, s->size);
9870 if (s->contents == NULL)
9871 return FALSE;
9872 }
9873
9874 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9875 {
9876 if (!is_ppc64_elf (ibfd))
9877 continue;
9878
9879 s = ppc64_elf_tdata (ibfd)->got;
9880 if (s != NULL && s != htab->elf.sgot)
9881 {
9882 if (s->size == 0)
9883 s->flags |= SEC_EXCLUDE;
9884 else
9885 {
9886 s->contents = bfd_zalloc (ibfd, s->size);
9887 if (s->contents == NULL)
9888 return FALSE;
9889 }
9890 }
9891 s = ppc64_elf_tdata (ibfd)->relgot;
9892 if (s != NULL)
9893 {
9894 if (s->size == 0)
9895 s->flags |= SEC_EXCLUDE;
9896 else
9897 {
9898 s->contents = bfd_zalloc (ibfd, s->size);
9899 if (s->contents == NULL)
9900 return FALSE;
9901 relocs = TRUE;
9902 s->reloc_count = 0;
9903 }
9904 }
9905 }
9906
9907 if (htab->elf.dynamic_sections_created)
9908 {
9909 bfd_boolean tls_opt;
9910
9911 /* Add some entries to the .dynamic section. We fill in the
9912 values later, in ppc64_elf_finish_dynamic_sections, but we
9913 must add the entries now so that we get the correct size for
9914 the .dynamic section. The DT_DEBUG entry is filled in by the
9915 dynamic linker and used by the debugger. */
9916 #define add_dynamic_entry(TAG, VAL) \
9917 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9918
9919 if (info->executable)
9920 {
9921 if (!add_dynamic_entry (DT_DEBUG, 0))
9922 return FALSE;
9923 }
9924
9925 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
9926 {
9927 if (!add_dynamic_entry (DT_PLTGOT, 0)
9928 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9929 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9930 || !add_dynamic_entry (DT_JMPREL, 0)
9931 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9932 return FALSE;
9933 }
9934
9935 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
9936 {
9937 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9938 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9939 return FALSE;
9940 }
9941
9942 tls_opt = (!htab->params->no_tls_get_addr_opt
9943 && htab->tls_get_addr_fd != NULL
9944 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
9945 if (tls_opt || !htab->opd_abi)
9946 {
9947 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
9948 return FALSE;
9949 }
9950
9951 if (relocs)
9952 {
9953 if (!add_dynamic_entry (DT_RELA, 0)
9954 || !add_dynamic_entry (DT_RELASZ, 0)
9955 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9956 return FALSE;
9957
9958 /* If any dynamic relocs apply to a read-only section,
9959 then we need a DT_TEXTREL entry. */
9960 if ((info->flags & DF_TEXTREL) == 0)
9961 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
9962
9963 if ((info->flags & DF_TEXTREL) != 0)
9964 {
9965 if (!add_dynamic_entry (DT_TEXTREL, 0))
9966 return FALSE;
9967 }
9968 }
9969 }
9970 #undef add_dynamic_entry
9971
9972 return TRUE;
9973 }
9974
9975 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
9976
9977 static bfd_boolean
9978 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
9979 {
9980 if (h->plt.plist != NULL
9981 && !h->def_regular
9982 && !h->pointer_equality_needed)
9983 return FALSE;
9984
9985 return _bfd_elf_hash_symbol (h);
9986 }
9987
9988 /* Determine the type of stub needed, if any, for a call. */
9989
9990 static inline enum ppc_stub_type
9991 ppc_type_of_stub (asection *input_sec,
9992 const Elf_Internal_Rela *rel,
9993 struct ppc_link_hash_entry **hash,
9994 struct plt_entry **plt_ent,
9995 bfd_vma destination,
9996 unsigned long local_off)
9997 {
9998 struct ppc_link_hash_entry *h = *hash;
9999 bfd_vma location;
10000 bfd_vma branch_offset;
10001 bfd_vma max_branch_offset;
10002 enum elf_ppc64_reloc_type r_type;
10003
10004 if (h != NULL)
10005 {
10006 struct plt_entry *ent;
10007 struct ppc_link_hash_entry *fdh = h;
10008 if (h->oh != NULL
10009 && h->oh->is_func_descriptor)
10010 {
10011 fdh = ppc_follow_link (h->oh);
10012 *hash = fdh;
10013 }
10014
10015 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10016 if (ent->addend == rel->r_addend
10017 && ent->plt.offset != (bfd_vma) -1)
10018 {
10019 *plt_ent = ent;
10020 return ppc_stub_plt_call;
10021 }
10022
10023 /* Here, we know we don't have a plt entry. If we don't have a
10024 either a defined function descriptor or a defined entry symbol
10025 in a regular object file, then it is pointless trying to make
10026 any other type of stub. */
10027 if (!is_static_defined (&fdh->elf)
10028 && !is_static_defined (&h->elf))
10029 return ppc_stub_none;
10030 }
10031 else if (elf_local_got_ents (input_sec->owner) != NULL)
10032 {
10033 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10034 struct plt_entry **local_plt = (struct plt_entry **)
10035 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10036 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10037
10038 if (local_plt[r_symndx] != NULL)
10039 {
10040 struct plt_entry *ent;
10041
10042 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10043 if (ent->addend == rel->r_addend
10044 && ent->plt.offset != (bfd_vma) -1)
10045 {
10046 *plt_ent = ent;
10047 return ppc_stub_plt_call;
10048 }
10049 }
10050 }
10051
10052 /* Determine where the call point is. */
10053 location = (input_sec->output_offset
10054 + input_sec->output_section->vma
10055 + rel->r_offset);
10056
10057 branch_offset = destination - location;
10058 r_type = ELF64_R_TYPE (rel->r_info);
10059
10060 /* Determine if a long branch stub is needed. */
10061 max_branch_offset = 1 << 25;
10062 if (r_type != R_PPC64_REL24)
10063 max_branch_offset = 1 << 15;
10064
10065 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10066 /* We need a stub. Figure out whether a long_branch or plt_branch
10067 is needed later. */
10068 return ppc_stub_long_branch;
10069
10070 return ppc_stub_none;
10071 }
10072
10073 /* With power7 weakly ordered memory model, it is possible for ld.so
10074 to update a plt entry in one thread and have another thread see a
10075 stale zero toc entry. To avoid this we need some sort of acquire
10076 barrier in the call stub. One solution is to make the load of the
10077 toc word seem to appear to depend on the load of the function entry
10078 word. Another solution is to test for r2 being zero, and branch to
10079 the appropriate glink entry if so.
10080
10081 . fake dep barrier compare
10082 . ld 12,xxx(2) ld 12,xxx(2)
10083 . mtctr 12 mtctr 12
10084 . xor 11,12,12 ld 2,xxx+8(2)
10085 . add 2,2,11 cmpldi 2,0
10086 . ld 2,xxx+8(2) bnectr+
10087 . bctr b <glink_entry>
10088
10089 The solution involving the compare turns out to be faster, so
10090 that's what we use unless the branch won't reach. */
10091
10092 #define ALWAYS_USE_FAKE_DEP 0
10093 #define ALWAYS_EMIT_R2SAVE 0
10094
10095 #define PPC_LO(v) ((v) & 0xffff)
10096 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10097 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10098
10099 static inline unsigned int
10100 plt_stub_size (struct ppc_link_hash_table *htab,
10101 struct ppc_stub_hash_entry *stub_entry,
10102 bfd_vma off)
10103 {
10104 unsigned size = 12;
10105
10106 if (ALWAYS_EMIT_R2SAVE
10107 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10108 size += 4;
10109 if (PPC_HA (off) != 0)
10110 size += 4;
10111 if (htab->opd_abi)
10112 {
10113 size += 4;
10114 if (htab->params->plt_static_chain)
10115 size += 4;
10116 if (htab->params->plt_thread_safe)
10117 size += 8;
10118 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10119 size += 4;
10120 }
10121 if (stub_entry->h != NULL
10122 && (stub_entry->h == htab->tls_get_addr_fd
10123 || stub_entry->h == htab->tls_get_addr)
10124 && !htab->params->no_tls_get_addr_opt)
10125 size += 13 * 4;
10126 return size;
10127 }
10128
10129 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10130 then return the padding needed to do so. */
10131 static inline unsigned int
10132 plt_stub_pad (struct ppc_link_hash_table *htab,
10133 struct ppc_stub_hash_entry *stub_entry,
10134 bfd_vma plt_off)
10135 {
10136 int stub_align = 1 << htab->params->plt_stub_align;
10137 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10138 bfd_vma stub_off = stub_entry->stub_sec->size;
10139
10140 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10141 > (stub_size & -stub_align))
10142 return stub_align - (stub_off & (stub_align - 1));
10143 return 0;
10144 }
10145
10146 /* Build a .plt call stub. */
10147
10148 static inline bfd_byte *
10149 build_plt_stub (struct ppc_link_hash_table *htab,
10150 struct ppc_stub_hash_entry *stub_entry,
10151 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10152 {
10153 bfd *obfd = htab->params->stub_bfd;
10154 bfd_boolean plt_load_toc = htab->opd_abi;
10155 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10156 bfd_boolean plt_thread_safe = htab->params->plt_thread_safe;
10157 bfd_boolean use_fake_dep = plt_thread_safe;
10158 bfd_vma cmp_branch_off = 0;
10159
10160 if (!ALWAYS_USE_FAKE_DEP
10161 && plt_load_toc
10162 && plt_thread_safe
10163 && !(stub_entry->h != NULL
10164 && (stub_entry->h == htab->tls_get_addr_fd
10165 || stub_entry->h == htab->tls_get_addr)
10166 && !htab->params->no_tls_get_addr_opt))
10167 {
10168 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10169 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10170 / PLT_ENTRY_SIZE (htab));
10171 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10172 bfd_vma to, from;
10173
10174 if (pltindex > 32768)
10175 glinkoff += (pltindex - 32768) * 4;
10176 to = (glinkoff
10177 + htab->glink->output_offset
10178 + htab->glink->output_section->vma);
10179 from = (p - stub_entry->stub_sec->contents
10180 + 4 * (ALWAYS_EMIT_R2SAVE
10181 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10182 + 4 * (PPC_HA (offset) != 0)
10183 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10184 != PPC_HA (offset))
10185 + 4 * (plt_static_chain != 0)
10186 + 20
10187 + stub_entry->stub_sec->output_offset
10188 + stub_entry->stub_sec->output_section->vma);
10189 cmp_branch_off = to - from;
10190 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10191 }
10192
10193 if (PPC_HA (offset) != 0)
10194 {
10195 if (r != NULL)
10196 {
10197 if (ALWAYS_EMIT_R2SAVE
10198 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10199 r[0].r_offset += 4;
10200 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10201 r[1].r_offset = r[0].r_offset + 4;
10202 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10203 r[1].r_addend = r[0].r_addend;
10204 if (plt_load_toc)
10205 {
10206 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10207 {
10208 r[2].r_offset = r[1].r_offset + 4;
10209 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10210 r[2].r_addend = r[0].r_addend;
10211 }
10212 else
10213 {
10214 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10215 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10216 r[2].r_addend = r[0].r_addend + 8;
10217 if (plt_static_chain)
10218 {
10219 r[3].r_offset = r[2].r_offset + 4;
10220 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10221 r[3].r_addend = r[0].r_addend + 16;
10222 }
10223 }
10224 }
10225 }
10226 if (ALWAYS_EMIT_R2SAVE
10227 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10228 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10229 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10230 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10231 if (plt_load_toc
10232 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10233 {
10234 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10235 offset = 0;
10236 }
10237 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10238 if (plt_load_toc)
10239 {
10240 if (use_fake_dep)
10241 {
10242 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10243 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10244 }
10245 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10246 if (plt_static_chain)
10247 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10248 }
10249 }
10250 else
10251 {
10252 if (r != NULL)
10253 {
10254 if (ALWAYS_EMIT_R2SAVE
10255 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10256 r[0].r_offset += 4;
10257 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10258 if (plt_load_toc)
10259 {
10260 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10261 {
10262 r[1].r_offset = r[0].r_offset + 4;
10263 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10264 r[1].r_addend = r[0].r_addend;
10265 }
10266 else
10267 {
10268 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10269 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10270 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10271 if (plt_static_chain)
10272 {
10273 r[2].r_offset = r[1].r_offset + 4;
10274 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10275 r[2].r_addend = r[0].r_addend + 8;
10276 }
10277 }
10278 }
10279 }
10280 if (ALWAYS_EMIT_R2SAVE
10281 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10282 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10283 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10284 if (plt_load_toc
10285 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10286 {
10287 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10288 offset = 0;
10289 }
10290 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10291 if (plt_load_toc)
10292 {
10293 if (use_fake_dep)
10294 {
10295 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10296 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10297 }
10298 if (plt_static_chain)
10299 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10300 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10301 }
10302 }
10303 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10304 {
10305 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10306 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10307 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10308 }
10309 else
10310 bfd_put_32 (obfd, BCTR, p), p += 4;
10311 return p;
10312 }
10313
10314 /* Build a special .plt call stub for __tls_get_addr. */
10315
10316 #define LD_R11_0R3 0xe9630000
10317 #define LD_R12_0R3 0xe9830000
10318 #define MR_R0_R3 0x7c601b78
10319 #define CMPDI_R11_0 0x2c2b0000
10320 #define ADD_R3_R12_R13 0x7c6c6a14
10321 #define BEQLR 0x4d820020
10322 #define MR_R3_R0 0x7c030378
10323 #define STD_R11_0R1 0xf9610000
10324 #define BCTRL 0x4e800421
10325 #define LD_R11_0R1 0xe9610000
10326 #define MTLR_R11 0x7d6803a6
10327
10328 static inline bfd_byte *
10329 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10330 struct ppc_stub_hash_entry *stub_entry,
10331 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10332 {
10333 bfd *obfd = htab->params->stub_bfd;
10334
10335 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10336 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10337 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10338 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10339 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10340 bfd_put_32 (obfd, BEQLR, p), p += 4;
10341 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10342 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10343 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10344
10345 if (r != NULL)
10346 r[0].r_offset += 9 * 4;
10347 p = build_plt_stub (htab, stub_entry, p, offset, r);
10348 bfd_put_32 (obfd, BCTRL, p - 4);
10349
10350 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10351 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10352 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10353 bfd_put_32 (obfd, BLR, p), p += 4;
10354
10355 return p;
10356 }
10357
10358 static Elf_Internal_Rela *
10359 get_relocs (asection *sec, int count)
10360 {
10361 Elf_Internal_Rela *relocs;
10362 struct bfd_elf_section_data *elfsec_data;
10363
10364 elfsec_data = elf_section_data (sec);
10365 relocs = elfsec_data->relocs;
10366 if (relocs == NULL)
10367 {
10368 bfd_size_type relsize;
10369 relsize = sec->reloc_count * sizeof (*relocs);
10370 relocs = bfd_alloc (sec->owner, relsize);
10371 if (relocs == NULL)
10372 return NULL;
10373 elfsec_data->relocs = relocs;
10374 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10375 sizeof (Elf_Internal_Shdr));
10376 if (elfsec_data->rela.hdr == NULL)
10377 return NULL;
10378 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10379 * sizeof (Elf64_External_Rela));
10380 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10381 sec->reloc_count = 0;
10382 }
10383 relocs += sec->reloc_count;
10384 sec->reloc_count += count;
10385 return relocs;
10386 }
10387
10388 static bfd_vma
10389 get_r2off (struct bfd_link_info *info,
10390 struct ppc_stub_hash_entry *stub_entry)
10391 {
10392 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10393 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
10394
10395 if (r2off == 0)
10396 {
10397 /* Support linking -R objects. Get the toc pointer from the
10398 opd entry. */
10399 char buf[8];
10400 if (!htab->opd_abi)
10401 return r2off;
10402 asection *opd = stub_entry->h->elf.root.u.def.section;
10403 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10404
10405 if (strcmp (opd->name, ".opd") != 0
10406 || opd->reloc_count != 0)
10407 {
10408 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10409 stub_entry->h->elf.root.root.string);
10410 bfd_set_error (bfd_error_bad_value);
10411 return 0;
10412 }
10413 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10414 return 0;
10415 r2off = bfd_get_64 (opd->owner, buf);
10416 r2off -= elf_gp (info->output_bfd);
10417 }
10418 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
10419 return r2off;
10420 }
10421
10422 static bfd_boolean
10423 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10424 {
10425 struct ppc_stub_hash_entry *stub_entry;
10426 struct ppc_branch_hash_entry *br_entry;
10427 struct bfd_link_info *info;
10428 struct ppc_link_hash_table *htab;
10429 bfd_byte *loc;
10430 bfd_byte *p;
10431 bfd_vma dest, off;
10432 int size;
10433 Elf_Internal_Rela *r;
10434 asection *plt;
10435
10436 /* Massage our args to the form they really have. */
10437 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10438 info = in_arg;
10439
10440 htab = ppc_hash_table (info);
10441 if (htab == NULL)
10442 return FALSE;
10443
10444 /* Make a note of the offset within the stubs for this entry. */
10445 stub_entry->stub_offset = stub_entry->stub_sec->size;
10446 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10447
10448 htab->stub_count[stub_entry->stub_type - 1] += 1;
10449 switch (stub_entry->stub_type)
10450 {
10451 case ppc_stub_long_branch:
10452 case ppc_stub_long_branch_r2off:
10453 /* Branches are relative. This is where we are going to. */
10454 dest = (stub_entry->target_value
10455 + stub_entry->target_section->output_offset
10456 + stub_entry->target_section->output_section->vma);
10457 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10458 off = dest;
10459
10460 /* And this is where we are coming from. */
10461 off -= (stub_entry->stub_offset
10462 + stub_entry->stub_sec->output_offset
10463 + stub_entry->stub_sec->output_section->vma);
10464
10465 size = 4;
10466 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10467 {
10468 bfd_vma r2off = get_r2off (info, stub_entry);
10469
10470 if (r2off == 0)
10471 {
10472 htab->stub_error = TRUE;
10473 return FALSE;
10474 }
10475 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10476 loc += 4;
10477 size = 12;
10478 if (PPC_HA (r2off) != 0)
10479 {
10480 size = 16;
10481 bfd_put_32 (htab->params->stub_bfd,
10482 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10483 loc += 4;
10484 }
10485 bfd_put_32 (htab->params->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10486 loc += 4;
10487 off -= size - 4;
10488 }
10489 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10490
10491 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10492 {
10493 info->callbacks->einfo
10494 (_("%P: long branch stub `%s' offset overflow\n"),
10495 stub_entry->root.string);
10496 htab->stub_error = TRUE;
10497 return FALSE;
10498 }
10499
10500 if (info->emitrelocations)
10501 {
10502 r = get_relocs (stub_entry->stub_sec, 1);
10503 if (r == NULL)
10504 return FALSE;
10505 r->r_offset = loc - stub_entry->stub_sec->contents;
10506 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10507 r->r_addend = dest;
10508 if (stub_entry->h != NULL)
10509 {
10510 struct elf_link_hash_entry **hashes;
10511 unsigned long symndx;
10512 struct ppc_link_hash_entry *h;
10513
10514 hashes = elf_sym_hashes (htab->params->stub_bfd);
10515 if (hashes == NULL)
10516 {
10517 bfd_size_type hsize;
10518
10519 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10520 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10521 if (hashes == NULL)
10522 return FALSE;
10523 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10524 htab->stub_globals = 1;
10525 }
10526 symndx = htab->stub_globals++;
10527 h = stub_entry->h;
10528 hashes[symndx] = &h->elf;
10529 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10530 if (h->oh != NULL && h->oh->is_func)
10531 h = ppc_follow_link (h->oh);
10532 if (h->elf.root.u.def.section != stub_entry->target_section)
10533 /* H is an opd symbol. The addend must be zero. */
10534 r->r_addend = 0;
10535 else
10536 {
10537 off = (h->elf.root.u.def.value
10538 + h->elf.root.u.def.section->output_offset
10539 + h->elf.root.u.def.section->output_section->vma);
10540 r->r_addend -= off;
10541 }
10542 }
10543 }
10544 break;
10545
10546 case ppc_stub_plt_branch:
10547 case ppc_stub_plt_branch_r2off:
10548 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10549 stub_entry->root.string + 9,
10550 FALSE, FALSE);
10551 if (br_entry == NULL)
10552 {
10553 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10554 stub_entry->root.string);
10555 htab->stub_error = TRUE;
10556 return FALSE;
10557 }
10558
10559 dest = (stub_entry->target_value
10560 + stub_entry->target_section->output_offset
10561 + stub_entry->target_section->output_section->vma);
10562 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10563 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10564
10565 bfd_put_64 (htab->brlt->owner, dest,
10566 htab->brlt->contents + br_entry->offset);
10567
10568 if (br_entry->iter == htab->stub_iteration)
10569 {
10570 br_entry->iter = 0;
10571
10572 if (htab->relbrlt != NULL)
10573 {
10574 /* Create a reloc for the branch lookup table entry. */
10575 Elf_Internal_Rela rela;
10576 bfd_byte *rl;
10577
10578 rela.r_offset = (br_entry->offset
10579 + htab->brlt->output_offset
10580 + htab->brlt->output_section->vma);
10581 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10582 rela.r_addend = dest;
10583
10584 rl = htab->relbrlt->contents;
10585 rl += (htab->relbrlt->reloc_count++
10586 * sizeof (Elf64_External_Rela));
10587 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10588 }
10589 else if (info->emitrelocations)
10590 {
10591 r = get_relocs (htab->brlt, 1);
10592 if (r == NULL)
10593 return FALSE;
10594 /* brlt, being SEC_LINKER_CREATED does not go through the
10595 normal reloc processing. Symbols and offsets are not
10596 translated from input file to output file form, so
10597 set up the offset per the output file. */
10598 r->r_offset = (br_entry->offset
10599 + htab->brlt->output_offset
10600 + htab->brlt->output_section->vma);
10601 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10602 r->r_addend = dest;
10603 }
10604 }
10605
10606 dest = (br_entry->offset
10607 + htab->brlt->output_offset
10608 + htab->brlt->output_section->vma);
10609
10610 off = (dest
10611 - elf_gp (htab->brlt->output_section->owner)
10612 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10613
10614 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10615 {
10616 info->callbacks->einfo
10617 (_("%P: linkage table error against `%T'\n"),
10618 stub_entry->root.string);
10619 bfd_set_error (bfd_error_bad_value);
10620 htab->stub_error = TRUE;
10621 return FALSE;
10622 }
10623
10624 if (info->emitrelocations)
10625 {
10626 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10627 if (r == NULL)
10628 return FALSE;
10629 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10630 if (bfd_big_endian (info->output_bfd))
10631 r[0].r_offset += 2;
10632 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10633 r[0].r_offset += 4;
10634 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10635 r[0].r_addend = dest;
10636 if (PPC_HA (off) != 0)
10637 {
10638 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10639 r[1].r_offset = r[0].r_offset + 4;
10640 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10641 r[1].r_addend = r[0].r_addend;
10642 }
10643 }
10644
10645 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10646 {
10647 if (PPC_HA (off) != 0)
10648 {
10649 size = 16;
10650 bfd_put_32 (htab->params->stub_bfd,
10651 ADDIS_R11_R2 | PPC_HA (off), loc);
10652 loc += 4;
10653 bfd_put_32 (htab->params->stub_bfd,
10654 LD_R12_0R11 | PPC_LO (off), loc);
10655 }
10656 else
10657 {
10658 size = 12;
10659 bfd_put_32 (htab->params->stub_bfd,
10660 LD_R12_0R2 | PPC_LO (off), loc);
10661 }
10662 }
10663 else
10664 {
10665 bfd_vma r2off = get_r2off (info, stub_entry);
10666
10667 if (r2off == 0 && htab->opd_abi)
10668 {
10669 htab->stub_error = TRUE;
10670 return FALSE;
10671 }
10672
10673 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10674 loc += 4;
10675 size = 16;
10676 if (PPC_HA (off) != 0)
10677 {
10678 size += 4;
10679 bfd_put_32 (htab->params->stub_bfd,
10680 ADDIS_R11_R2 | PPC_HA (off), loc);
10681 loc += 4;
10682 bfd_put_32 (htab->params->stub_bfd,
10683 LD_R12_0R11 | PPC_LO (off), loc);
10684 }
10685 else
10686 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10687
10688 if (PPC_HA (r2off) != 0)
10689 {
10690 size += 4;
10691 loc += 4;
10692 bfd_put_32 (htab->params->stub_bfd,
10693 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10694 }
10695 if (PPC_LO (r2off) != 0)
10696 {
10697 size += 4;
10698 loc += 4;
10699 bfd_put_32 (htab->params->stub_bfd,
10700 ADDI_R2_R2 | PPC_LO (r2off), loc);
10701 }
10702 }
10703 loc += 4;
10704 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10705 loc += 4;
10706 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10707 break;
10708
10709 case ppc_stub_plt_call:
10710 case ppc_stub_plt_call_r2save:
10711 if (stub_entry->h != NULL
10712 && stub_entry->h->is_func_descriptor
10713 && stub_entry->h->oh != NULL)
10714 {
10715 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10716
10717 /* If the old-ABI "dot-symbol" is undefined make it weak so
10718 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10719 FIXME: We used to define the symbol on one of the call
10720 stubs instead, which is why we test symbol section id
10721 against htab->top_id in various places. Likely all
10722 these checks could now disappear. */
10723 if (fh->elf.root.type == bfd_link_hash_undefined)
10724 fh->elf.root.type = bfd_link_hash_undefweak;
10725 /* Stop undo_symbol_twiddle changing it back to undefined. */
10726 fh->was_undefined = 0;
10727 }
10728
10729 /* Now build the stub. */
10730 dest = stub_entry->plt_ent->plt.offset & ~1;
10731 if (dest >= (bfd_vma) -2)
10732 abort ();
10733
10734 plt = htab->elf.splt;
10735 if (!htab->elf.dynamic_sections_created
10736 || stub_entry->h == NULL
10737 || stub_entry->h->elf.dynindx == -1)
10738 plt = htab->elf.iplt;
10739
10740 dest += plt->output_offset + plt->output_section->vma;
10741
10742 if (stub_entry->h == NULL
10743 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10744 {
10745 Elf_Internal_Rela rela;
10746 bfd_byte *rl;
10747
10748 rela.r_offset = dest;
10749 if (htab->opd_abi)
10750 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10751 else
10752 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
10753 rela.r_addend = (stub_entry->target_value
10754 + stub_entry->target_section->output_offset
10755 + stub_entry->target_section->output_section->vma);
10756
10757 rl = (htab->elf.irelplt->contents
10758 + (htab->elf.irelplt->reloc_count++
10759 * sizeof (Elf64_External_Rela)));
10760 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10761 stub_entry->plt_ent->plt.offset |= 1;
10762 }
10763
10764 off = (dest
10765 - elf_gp (plt->output_section->owner)
10766 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10767
10768 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10769 {
10770 info->callbacks->einfo
10771 (_("%P: linkage table error against `%T'\n"),
10772 stub_entry->h != NULL
10773 ? stub_entry->h->elf.root.root.string
10774 : "<local sym>");
10775 bfd_set_error (bfd_error_bad_value);
10776 htab->stub_error = TRUE;
10777 return FALSE;
10778 }
10779
10780 if (htab->params->plt_stub_align != 0)
10781 {
10782 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10783
10784 stub_entry->stub_sec->size += pad;
10785 stub_entry->stub_offset = stub_entry->stub_sec->size;
10786 loc += pad;
10787 }
10788
10789 r = NULL;
10790 if (info->emitrelocations)
10791 {
10792 r = get_relocs (stub_entry->stub_sec,
10793 ((PPC_HA (off) != 0)
10794 + (htab->opd_abi
10795 ? 2 + (htab->params->plt_static_chain
10796 && PPC_HA (off + 16) == PPC_HA (off))
10797 : 1)));
10798 if (r == NULL)
10799 return FALSE;
10800 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10801 if (bfd_big_endian (info->output_bfd))
10802 r[0].r_offset += 2;
10803 r[0].r_addend = dest;
10804 }
10805 if (stub_entry->h != NULL
10806 && (stub_entry->h == htab->tls_get_addr_fd
10807 || stub_entry->h == htab->tls_get_addr)
10808 && !htab->params->no_tls_get_addr_opt)
10809 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10810 else
10811 p = build_plt_stub (htab, stub_entry, loc, off, r);
10812 size = p - loc;
10813 break;
10814
10815 default:
10816 BFD_FAIL ();
10817 return FALSE;
10818 }
10819
10820 stub_entry->stub_sec->size += size;
10821
10822 if (htab->params->emit_stub_syms)
10823 {
10824 struct elf_link_hash_entry *h;
10825 size_t len1, len2;
10826 char *name;
10827 const char *const stub_str[] = { "long_branch",
10828 "long_branch_r2off",
10829 "plt_branch",
10830 "plt_branch_r2off",
10831 "plt_call",
10832 "plt_call" };
10833
10834 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10835 len2 = strlen (stub_entry->root.string);
10836 name = bfd_malloc (len1 + len2 + 2);
10837 if (name == NULL)
10838 return FALSE;
10839 memcpy (name, stub_entry->root.string, 9);
10840 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10841 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10842 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10843 if (h == NULL)
10844 return FALSE;
10845 if (h->root.type == bfd_link_hash_new)
10846 {
10847 h->root.type = bfd_link_hash_defined;
10848 h->root.u.def.section = stub_entry->stub_sec;
10849 h->root.u.def.value = stub_entry->stub_offset;
10850 h->ref_regular = 1;
10851 h->def_regular = 1;
10852 h->ref_regular_nonweak = 1;
10853 h->forced_local = 1;
10854 h->non_elf = 0;
10855 }
10856 }
10857
10858 return TRUE;
10859 }
10860
10861 /* As above, but don't actually build the stub. Just bump offset so
10862 we know stub section sizes, and select plt_branch stubs where
10863 long_branch stubs won't do. */
10864
10865 static bfd_boolean
10866 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10867 {
10868 struct ppc_stub_hash_entry *stub_entry;
10869 struct bfd_link_info *info;
10870 struct ppc_link_hash_table *htab;
10871 bfd_vma off;
10872 int size;
10873
10874 /* Massage our args to the form they really have. */
10875 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10876 info = in_arg;
10877
10878 htab = ppc_hash_table (info);
10879 if (htab == NULL)
10880 return FALSE;
10881
10882 if (stub_entry->stub_type == ppc_stub_plt_call
10883 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10884 {
10885 asection *plt;
10886 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10887 if (off >= (bfd_vma) -2)
10888 abort ();
10889 plt = htab->elf.splt;
10890 if (!htab->elf.dynamic_sections_created
10891 || stub_entry->h == NULL
10892 || stub_entry->h->elf.dynindx == -1)
10893 plt = htab->elf.iplt;
10894 off += (plt->output_offset
10895 + plt->output_section->vma
10896 - elf_gp (plt->output_section->owner)
10897 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10898
10899 size = plt_stub_size (htab, stub_entry, off);
10900 if (htab->params->plt_stub_align)
10901 size += plt_stub_pad (htab, stub_entry, off);
10902 if (info->emitrelocations)
10903 {
10904 stub_entry->stub_sec->reloc_count
10905 += ((PPC_HA (off) != 0)
10906 + (htab->opd_abi
10907 ? 2 + (htab->params->plt_static_chain
10908 && PPC_HA (off + 16) == PPC_HA (off))
10909 : 1));
10910 stub_entry->stub_sec->flags |= SEC_RELOC;
10911 }
10912 }
10913 else
10914 {
10915 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10916 variants. */
10917 bfd_vma r2off = 0;
10918 bfd_vma local_off = 0;
10919
10920 off = (stub_entry->target_value
10921 + stub_entry->target_section->output_offset
10922 + stub_entry->target_section->output_section->vma);
10923 off -= (stub_entry->stub_sec->size
10924 + stub_entry->stub_sec->output_offset
10925 + stub_entry->stub_sec->output_section->vma);
10926
10927 /* Reset the stub type from the plt variant in case we now
10928 can reach with a shorter stub. */
10929 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10930 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10931
10932 size = 4;
10933 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10934 {
10935 r2off = get_r2off (info, stub_entry);
10936 if (r2off == 0 && htab->opd_abi)
10937 {
10938 htab->stub_error = TRUE;
10939 return FALSE;
10940 }
10941 size = 12;
10942 if (PPC_HA (r2off) != 0)
10943 size = 16;
10944 off -= size - 4;
10945 }
10946
10947 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10948
10949 /* If the branch offset if too big, use a ppc_stub_plt_branch.
10950 Do the same for -R objects without function descriptors. */
10951 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
10952 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
10953 && r2off == 0))
10954 {
10955 struct ppc_branch_hash_entry *br_entry;
10956
10957 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10958 stub_entry->root.string + 9,
10959 TRUE, FALSE);
10960 if (br_entry == NULL)
10961 {
10962 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10963 stub_entry->root.string);
10964 htab->stub_error = TRUE;
10965 return FALSE;
10966 }
10967
10968 if (br_entry->iter != htab->stub_iteration)
10969 {
10970 br_entry->iter = htab->stub_iteration;
10971 br_entry->offset = htab->brlt->size;
10972 htab->brlt->size += 8;
10973
10974 if (htab->relbrlt != NULL)
10975 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10976 else if (info->emitrelocations)
10977 {
10978 htab->brlt->reloc_count += 1;
10979 htab->brlt->flags |= SEC_RELOC;
10980 }
10981 }
10982
10983 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10984 off = (br_entry->offset
10985 + htab->brlt->output_offset
10986 + htab->brlt->output_section->vma
10987 - elf_gp (htab->brlt->output_section->owner)
10988 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10989
10990 if (info->emitrelocations)
10991 {
10992 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10993 stub_entry->stub_sec->flags |= SEC_RELOC;
10994 }
10995
10996 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10997 {
10998 size = 12;
10999 if (PPC_HA (off) != 0)
11000 size = 16;
11001 }
11002 else
11003 {
11004 size = 16;
11005 if (PPC_HA (off) != 0)
11006 size += 4;
11007
11008 if (PPC_HA (r2off) != 0)
11009 size += 4;
11010 if (PPC_LO (r2off) != 0)
11011 size += 4;
11012 }
11013 }
11014 else if (info->emitrelocations)
11015 {
11016 stub_entry->stub_sec->reloc_count += 1;
11017 stub_entry->stub_sec->flags |= SEC_RELOC;
11018 }
11019 }
11020
11021 stub_entry->stub_sec->size += size;
11022 return TRUE;
11023 }
11024
11025 /* Set up various things so that we can make a list of input sections
11026 for each output section included in the link. Returns -1 on error,
11027 0 when no stubs will be needed, and 1 on success. */
11028
11029 int
11030 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11031 {
11032 bfd *input_bfd;
11033 int top_id, top_index, id;
11034 asection *section;
11035 asection **input_list;
11036 bfd_size_type amt;
11037 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11038
11039 if (htab == NULL)
11040 return -1;
11041
11042 /* Find the top input section id. */
11043 for (input_bfd = info->input_bfds, top_id = 3;
11044 input_bfd != NULL;
11045 input_bfd = input_bfd->link_next)
11046 {
11047 for (section = input_bfd->sections;
11048 section != NULL;
11049 section = section->next)
11050 {
11051 if (top_id < section->id)
11052 top_id = section->id;
11053 }
11054 }
11055
11056 htab->top_id = top_id;
11057 amt = sizeof (struct map_stub) * (top_id + 1);
11058 htab->stub_group = bfd_zmalloc (amt);
11059 if (htab->stub_group == NULL)
11060 return -1;
11061
11062 /* Set toc_off for com, und, abs and ind sections. */
11063 for (id = 0; id < 3; id++)
11064 htab->stub_group[id].toc_off = TOC_BASE_OFF;
11065
11066 /* We can't use output_bfd->section_count here to find the top output
11067 section index as some sections may have been removed, and
11068 strip_excluded_output_sections doesn't renumber the indices. */
11069 for (section = info->output_bfd->sections, top_index = 0;
11070 section != NULL;
11071 section = section->next)
11072 {
11073 if (top_index < section->index)
11074 top_index = section->index;
11075 }
11076
11077 htab->top_index = top_index;
11078 amt = sizeof (asection *) * (top_index + 1);
11079 input_list = bfd_zmalloc (amt);
11080 htab->input_list = input_list;
11081 if (input_list == NULL)
11082 return -1;
11083
11084 return 1;
11085 }
11086
11087 /* Set up for first pass at multitoc partitioning. */
11088
11089 void
11090 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11091 {
11092 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11093
11094 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11095 htab->toc_bfd = NULL;
11096 htab->toc_first_sec = NULL;
11097 }
11098
11099 /* The linker repeatedly calls this function for each TOC input section
11100 and linker generated GOT section. Group input bfds such that the toc
11101 within a group is less than 64k in size. */
11102
11103 bfd_boolean
11104 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11105 {
11106 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11107 bfd_vma addr, off, limit;
11108
11109 if (htab == NULL)
11110 return FALSE;
11111
11112 if (!htab->second_toc_pass)
11113 {
11114 /* Keep track of the first .toc or .got section for this input bfd. */
11115 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11116
11117 if (new_bfd)
11118 {
11119 htab->toc_bfd = isec->owner;
11120 htab->toc_first_sec = isec;
11121 }
11122
11123 addr = isec->output_offset + isec->output_section->vma;
11124 off = addr - htab->toc_curr;
11125 limit = 0x80008000;
11126 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11127 limit = 0x10000;
11128 if (off + isec->size > limit)
11129 {
11130 addr = (htab->toc_first_sec->output_offset
11131 + htab->toc_first_sec->output_section->vma);
11132 htab->toc_curr = addr;
11133 }
11134
11135 /* toc_curr is the base address of this toc group. Set elf_gp
11136 for the input section to be the offset relative to the
11137 output toc base plus 0x8000. Making the input elf_gp an
11138 offset allows us to move the toc as a whole without
11139 recalculating input elf_gp. */
11140 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11141 off += TOC_BASE_OFF;
11142
11143 /* Die if someone uses a linker script that doesn't keep input
11144 file .toc and .got together. */
11145 if (new_bfd
11146 && elf_gp (isec->owner) != 0
11147 && elf_gp (isec->owner) != off)
11148 return FALSE;
11149
11150 elf_gp (isec->owner) = off;
11151 return TRUE;
11152 }
11153
11154 /* During the second pass toc_first_sec points to the start of
11155 a toc group, and toc_curr is used to track the old elf_gp.
11156 We use toc_bfd to ensure we only look at each bfd once. */
11157 if (htab->toc_bfd == isec->owner)
11158 return TRUE;
11159 htab->toc_bfd = isec->owner;
11160
11161 if (htab->toc_first_sec == NULL
11162 || htab->toc_curr != elf_gp (isec->owner))
11163 {
11164 htab->toc_curr = elf_gp (isec->owner);
11165 htab->toc_first_sec = isec;
11166 }
11167 addr = (htab->toc_first_sec->output_offset
11168 + htab->toc_first_sec->output_section->vma);
11169 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11170 elf_gp (isec->owner) = off;
11171
11172 return TRUE;
11173 }
11174
11175 /* Called via elf_link_hash_traverse to merge GOT entries for global
11176 symbol H. */
11177
11178 static bfd_boolean
11179 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11180 {
11181 if (h->root.type == bfd_link_hash_indirect)
11182 return TRUE;
11183
11184 merge_got_entries (&h->got.glist);
11185
11186 return TRUE;
11187 }
11188
11189 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11190 symbol H. */
11191
11192 static bfd_boolean
11193 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11194 {
11195 struct got_entry *gent;
11196
11197 if (h->root.type == bfd_link_hash_indirect)
11198 return TRUE;
11199
11200 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11201 if (!gent->is_indirect)
11202 allocate_got (h, (struct bfd_link_info *) inf, gent);
11203 return TRUE;
11204 }
11205
11206 /* Called on the first multitoc pass after the last call to
11207 ppc64_elf_next_toc_section. This function removes duplicate GOT
11208 entries. */
11209
11210 bfd_boolean
11211 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11212 {
11213 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11214 struct bfd *ibfd, *ibfd2;
11215 bfd_boolean done_something;
11216
11217 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11218
11219 if (!htab->do_multi_toc)
11220 return FALSE;
11221
11222 /* Merge global sym got entries within a toc group. */
11223 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11224
11225 /* And tlsld_got. */
11226 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11227 {
11228 struct got_entry *ent, *ent2;
11229
11230 if (!is_ppc64_elf (ibfd))
11231 continue;
11232
11233 ent = ppc64_tlsld_got (ibfd);
11234 if (!ent->is_indirect
11235 && ent->got.offset != (bfd_vma) -1)
11236 {
11237 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
11238 {
11239 if (!is_ppc64_elf (ibfd2))
11240 continue;
11241
11242 ent2 = ppc64_tlsld_got (ibfd2);
11243 if (!ent2->is_indirect
11244 && ent2->got.offset != (bfd_vma) -1
11245 && elf_gp (ibfd2) == elf_gp (ibfd))
11246 {
11247 ent2->is_indirect = TRUE;
11248 ent2->got.ent = ent;
11249 }
11250 }
11251 }
11252 }
11253
11254 /* Zap sizes of got sections. */
11255 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11256 htab->elf.irelplt->size -= htab->got_reli_size;
11257 htab->got_reli_size = 0;
11258
11259 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11260 {
11261 asection *got, *relgot;
11262
11263 if (!is_ppc64_elf (ibfd))
11264 continue;
11265
11266 got = ppc64_elf_tdata (ibfd)->got;
11267 if (got != NULL)
11268 {
11269 got->rawsize = got->size;
11270 got->size = 0;
11271 relgot = ppc64_elf_tdata (ibfd)->relgot;
11272 relgot->rawsize = relgot->size;
11273 relgot->size = 0;
11274 }
11275 }
11276
11277 /* Now reallocate the got, local syms first. We don't need to
11278 allocate section contents again since we never increase size. */
11279 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11280 {
11281 struct got_entry **lgot_ents;
11282 struct got_entry **end_lgot_ents;
11283 struct plt_entry **local_plt;
11284 struct plt_entry **end_local_plt;
11285 unsigned char *lgot_masks;
11286 bfd_size_type locsymcount;
11287 Elf_Internal_Shdr *symtab_hdr;
11288 asection *s;
11289
11290 if (!is_ppc64_elf (ibfd))
11291 continue;
11292
11293 lgot_ents = elf_local_got_ents (ibfd);
11294 if (!lgot_ents)
11295 continue;
11296
11297 symtab_hdr = &elf_symtab_hdr (ibfd);
11298 locsymcount = symtab_hdr->sh_info;
11299 end_lgot_ents = lgot_ents + locsymcount;
11300 local_plt = (struct plt_entry **) end_lgot_ents;
11301 end_local_plt = local_plt + locsymcount;
11302 lgot_masks = (unsigned char *) end_local_plt;
11303 s = ppc64_elf_tdata (ibfd)->got;
11304 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11305 {
11306 struct got_entry *ent;
11307
11308 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11309 {
11310 unsigned int ent_size = 8;
11311 unsigned int rel_size = sizeof (Elf64_External_Rela);
11312
11313 ent->got.offset = s->size;
11314 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11315 {
11316 ent_size *= 2;
11317 rel_size *= 2;
11318 }
11319 s->size += ent_size;
11320 if ((*lgot_masks & PLT_IFUNC) != 0)
11321 {
11322 htab->elf.irelplt->size += rel_size;
11323 htab->got_reli_size += rel_size;
11324 }
11325 else if (info->shared)
11326 {
11327 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11328 srel->size += rel_size;
11329 }
11330 }
11331 }
11332 }
11333
11334 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11335
11336 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11337 {
11338 struct got_entry *ent;
11339
11340 if (!is_ppc64_elf (ibfd))
11341 continue;
11342
11343 ent = ppc64_tlsld_got (ibfd);
11344 if (!ent->is_indirect
11345 && ent->got.offset != (bfd_vma) -1)
11346 {
11347 asection *s = ppc64_elf_tdata (ibfd)->got;
11348 ent->got.offset = s->size;
11349 s->size += 16;
11350 if (info->shared)
11351 {
11352 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11353 srel->size += sizeof (Elf64_External_Rela);
11354 }
11355 }
11356 }
11357
11358 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11359 if (!done_something)
11360 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11361 {
11362 asection *got;
11363
11364 if (!is_ppc64_elf (ibfd))
11365 continue;
11366
11367 got = ppc64_elf_tdata (ibfd)->got;
11368 if (got != NULL)
11369 {
11370 done_something = got->rawsize != got->size;
11371 if (done_something)
11372 break;
11373 }
11374 }
11375
11376 if (done_something)
11377 (*htab->params->layout_sections_again) ();
11378
11379 /* Set up for second pass over toc sections to recalculate elf_gp
11380 on input sections. */
11381 htab->toc_bfd = NULL;
11382 htab->toc_first_sec = NULL;
11383 htab->second_toc_pass = TRUE;
11384 return done_something;
11385 }
11386
11387 /* Called after second pass of multitoc partitioning. */
11388
11389 void
11390 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11391 {
11392 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11393
11394 /* After the second pass, toc_curr tracks the TOC offset used
11395 for code sections below in ppc64_elf_next_input_section. */
11396 htab->toc_curr = TOC_BASE_OFF;
11397 }
11398
11399 /* No toc references were found in ISEC. If the code in ISEC makes no
11400 calls, then there's no need to use toc adjusting stubs when branching
11401 into ISEC. Actually, indirect calls from ISEC are OK as they will
11402 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11403 needed, and 2 if a cyclical call-graph was found but no other reason
11404 for a stub was detected. If called from the top level, a return of
11405 2 means the same as a return of 0. */
11406
11407 static int
11408 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11409 {
11410 int ret;
11411
11412 /* Mark this section as checked. */
11413 isec->call_check_done = 1;
11414
11415 /* We know none of our code bearing sections will need toc stubs. */
11416 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11417 return 0;
11418
11419 if (isec->size == 0)
11420 return 0;
11421
11422 if (isec->output_section == NULL)
11423 return 0;
11424
11425 ret = 0;
11426 if (isec->reloc_count != 0)
11427 {
11428 Elf_Internal_Rela *relstart, *rel;
11429 Elf_Internal_Sym *local_syms;
11430 struct ppc_link_hash_table *htab;
11431
11432 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11433 info->keep_memory);
11434 if (relstart == NULL)
11435 return -1;
11436
11437 /* Look for branches to outside of this section. */
11438 local_syms = NULL;
11439 htab = ppc_hash_table (info);
11440 if (htab == NULL)
11441 return -1;
11442
11443 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11444 {
11445 enum elf_ppc64_reloc_type r_type;
11446 unsigned long r_symndx;
11447 struct elf_link_hash_entry *h;
11448 struct ppc_link_hash_entry *eh;
11449 Elf_Internal_Sym *sym;
11450 asection *sym_sec;
11451 struct _opd_sec_data *opd;
11452 bfd_vma sym_value;
11453 bfd_vma dest;
11454
11455 r_type = ELF64_R_TYPE (rel->r_info);
11456 if (r_type != R_PPC64_REL24
11457 && r_type != R_PPC64_REL14
11458 && r_type != R_PPC64_REL14_BRTAKEN
11459 && r_type != R_PPC64_REL14_BRNTAKEN)
11460 continue;
11461
11462 r_symndx = ELF64_R_SYM (rel->r_info);
11463 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11464 isec->owner))
11465 {
11466 ret = -1;
11467 break;
11468 }
11469
11470 /* Calls to dynamic lib functions go through a plt call stub
11471 that uses r2. */
11472 eh = (struct ppc_link_hash_entry *) h;
11473 if (eh != NULL
11474 && (eh->elf.plt.plist != NULL
11475 || (eh->oh != NULL
11476 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11477 {
11478 ret = 1;
11479 break;
11480 }
11481
11482 if (sym_sec == NULL)
11483 /* Ignore other undefined symbols. */
11484 continue;
11485
11486 /* Assume branches to other sections not included in the
11487 link need stubs too, to cover -R and absolute syms. */
11488 if (sym_sec->output_section == NULL)
11489 {
11490 ret = 1;
11491 break;
11492 }
11493
11494 if (h == NULL)
11495 sym_value = sym->st_value;
11496 else
11497 {
11498 if (h->root.type != bfd_link_hash_defined
11499 && h->root.type != bfd_link_hash_defweak)
11500 abort ();
11501 sym_value = h->root.u.def.value;
11502 }
11503 sym_value += rel->r_addend;
11504
11505 /* If this branch reloc uses an opd sym, find the code section. */
11506 opd = get_opd_info (sym_sec);
11507 if (opd != NULL)
11508 {
11509 if (h == NULL && opd->adjust != NULL)
11510 {
11511 long adjust;
11512
11513 adjust = opd->adjust[sym->st_value / 8];
11514 if (adjust == -1)
11515 /* Assume deleted functions won't ever be called. */
11516 continue;
11517 sym_value += adjust;
11518 }
11519
11520 dest = opd_entry_value (sym_sec, sym_value,
11521 &sym_sec, NULL, FALSE);
11522 if (dest == (bfd_vma) -1)
11523 continue;
11524 }
11525 else
11526 dest = (sym_value
11527 + sym_sec->output_offset
11528 + sym_sec->output_section->vma);
11529
11530 /* Ignore branch to self. */
11531 if (sym_sec == isec)
11532 continue;
11533
11534 /* If the called function uses the toc, we need a stub. */
11535 if (sym_sec->has_toc_reloc
11536 || sym_sec->makes_toc_func_call)
11537 {
11538 ret = 1;
11539 break;
11540 }
11541
11542 /* Assume any branch that needs a long branch stub might in fact
11543 need a plt_branch stub. A plt_branch stub uses r2. */
11544 else if (dest - (isec->output_offset
11545 + isec->output_section->vma
11546 + rel->r_offset) + (1 << 25)
11547 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11548 ? h->other
11549 : sym->st_other))
11550 {
11551 ret = 1;
11552 break;
11553 }
11554
11555 /* If calling back to a section in the process of being
11556 tested, we can't say for sure that no toc adjusting stubs
11557 are needed, so don't return zero. */
11558 else if (sym_sec->call_check_in_progress)
11559 ret = 2;
11560
11561 /* Branches to another section that itself doesn't have any TOC
11562 references are OK. Recursively call ourselves to check. */
11563 else if (!sym_sec->call_check_done)
11564 {
11565 int recur;
11566
11567 /* Mark current section as indeterminate, so that other
11568 sections that call back to current won't be marked as
11569 known. */
11570 isec->call_check_in_progress = 1;
11571 recur = toc_adjusting_stub_needed (info, sym_sec);
11572 isec->call_check_in_progress = 0;
11573
11574 if (recur != 0)
11575 {
11576 ret = recur;
11577 if (recur != 2)
11578 break;
11579 }
11580 }
11581 }
11582
11583 if (local_syms != NULL
11584 && (elf_symtab_hdr (isec->owner).contents
11585 != (unsigned char *) local_syms))
11586 free (local_syms);
11587 if (elf_section_data (isec)->relocs != relstart)
11588 free (relstart);
11589 }
11590
11591 if ((ret & 1) == 0
11592 && isec->map_head.s != NULL
11593 && (strcmp (isec->output_section->name, ".init") == 0
11594 || strcmp (isec->output_section->name, ".fini") == 0))
11595 {
11596 if (isec->map_head.s->has_toc_reloc
11597 || isec->map_head.s->makes_toc_func_call)
11598 ret = 1;
11599 else if (!isec->map_head.s->call_check_done)
11600 {
11601 int recur;
11602 isec->call_check_in_progress = 1;
11603 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11604 isec->call_check_in_progress = 0;
11605 if (recur != 0)
11606 ret = recur;
11607 }
11608 }
11609
11610 if (ret == 1)
11611 isec->makes_toc_func_call = 1;
11612
11613 return ret;
11614 }
11615
11616 /* The linker repeatedly calls this function for each input section,
11617 in the order that input sections are linked into output sections.
11618 Build lists of input sections to determine groupings between which
11619 we may insert linker stubs. */
11620
11621 bfd_boolean
11622 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11623 {
11624 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11625
11626 if (htab == NULL)
11627 return FALSE;
11628
11629 if ((isec->output_section->flags & SEC_CODE) != 0
11630 && isec->output_section->index <= htab->top_index)
11631 {
11632 asection **list = htab->input_list + isec->output_section->index;
11633 /* Steal the link_sec pointer for our list. */
11634 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11635 /* This happens to make the list in reverse order,
11636 which is what we want. */
11637 PREV_SEC (isec) = *list;
11638 *list = isec;
11639 }
11640
11641 if (htab->multi_toc_needed)
11642 {
11643 /* Analyse sections that aren't already flagged as needing a
11644 valid toc pointer. Exclude .fixup for the linux kernel.
11645 .fixup contains branches, but only back to the function that
11646 hit an exception. */
11647 if (!(isec->has_toc_reloc
11648 || (isec->flags & SEC_CODE) == 0
11649 || strcmp (isec->name, ".fixup") == 0
11650 || isec->call_check_done))
11651 {
11652 if (toc_adjusting_stub_needed (info, isec) < 0)
11653 return FALSE;
11654 }
11655 /* Make all sections use the TOC assigned for this object file.
11656 This will be wrong for pasted sections; We fix that in
11657 check_pasted_section(). */
11658 if (elf_gp (isec->owner) != 0)
11659 htab->toc_curr = elf_gp (isec->owner);
11660 }
11661
11662 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11663 return TRUE;
11664 }
11665
11666 /* Check that all .init and .fini sections use the same toc, if they
11667 have toc relocs. */
11668
11669 static bfd_boolean
11670 check_pasted_section (struct bfd_link_info *info, const char *name)
11671 {
11672 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11673
11674 if (o != NULL)
11675 {
11676 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11677 bfd_vma toc_off = 0;
11678 asection *i;
11679
11680 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11681 if (i->has_toc_reloc)
11682 {
11683 if (toc_off == 0)
11684 toc_off = htab->stub_group[i->id].toc_off;
11685 else if (toc_off != htab->stub_group[i->id].toc_off)
11686 return FALSE;
11687 }
11688
11689 if (toc_off == 0)
11690 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11691 if (i->makes_toc_func_call)
11692 {
11693 toc_off = htab->stub_group[i->id].toc_off;
11694 break;
11695 }
11696
11697 /* Make sure the whole pasted function uses the same toc offset. */
11698 if (toc_off != 0)
11699 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11700 htab->stub_group[i->id].toc_off = toc_off;
11701 }
11702 return TRUE;
11703 }
11704
11705 bfd_boolean
11706 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11707 {
11708 return (check_pasted_section (info, ".init")
11709 & check_pasted_section (info, ".fini"));
11710 }
11711
11712 /* See whether we can group stub sections together. Grouping stub
11713 sections may result in fewer stubs. More importantly, we need to
11714 put all .init* and .fini* stubs at the beginning of the .init or
11715 .fini output sections respectively, because glibc splits the
11716 _init and _fini functions into multiple parts. Putting a stub in
11717 the middle of a function is not a good idea. */
11718
11719 static void
11720 group_sections (struct ppc_link_hash_table *htab,
11721 bfd_size_type stub_group_size,
11722 bfd_boolean stubs_always_before_branch)
11723 {
11724 asection **list;
11725 bfd_size_type stub14_group_size;
11726 bfd_boolean suppress_size_errors;
11727
11728 suppress_size_errors = FALSE;
11729 stub14_group_size = stub_group_size;
11730 if (stub_group_size == 1)
11731 {
11732 /* Default values. */
11733 if (stubs_always_before_branch)
11734 {
11735 stub_group_size = 0x1e00000;
11736 stub14_group_size = 0x7800;
11737 }
11738 else
11739 {
11740 stub_group_size = 0x1c00000;
11741 stub14_group_size = 0x7000;
11742 }
11743 suppress_size_errors = TRUE;
11744 }
11745
11746 list = htab->input_list + htab->top_index;
11747 do
11748 {
11749 asection *tail = *list;
11750 while (tail != NULL)
11751 {
11752 asection *curr;
11753 asection *prev;
11754 bfd_size_type total;
11755 bfd_boolean big_sec;
11756 bfd_vma curr_toc;
11757
11758 curr = tail;
11759 total = tail->size;
11760 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11761 && ppc64_elf_section_data (tail)->has_14bit_branch
11762 ? stub14_group_size : stub_group_size);
11763 if (big_sec && !suppress_size_errors)
11764 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11765 tail->owner, tail);
11766 curr_toc = htab->stub_group[tail->id].toc_off;
11767
11768 while ((prev = PREV_SEC (curr)) != NULL
11769 && ((total += curr->output_offset - prev->output_offset)
11770 < (ppc64_elf_section_data (prev) != NULL
11771 && ppc64_elf_section_data (prev)->has_14bit_branch
11772 ? stub14_group_size : stub_group_size))
11773 && htab->stub_group[prev->id].toc_off == curr_toc)
11774 curr = prev;
11775
11776 /* OK, the size from the start of CURR to the end is less
11777 than stub_group_size and thus can be handled by one stub
11778 section. (or the tail section is itself larger than
11779 stub_group_size, in which case we may be toast.) We
11780 should really be keeping track of the total size of stubs
11781 added here, as stubs contribute to the final output
11782 section size. That's a little tricky, and this way will
11783 only break if stubs added make the total size more than
11784 2^25, ie. for the default stub_group_size, if stubs total
11785 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11786 do
11787 {
11788 prev = PREV_SEC (tail);
11789 /* Set up this stub group. */
11790 htab->stub_group[tail->id].link_sec = curr;
11791 }
11792 while (tail != curr && (tail = prev) != NULL);
11793
11794 /* But wait, there's more! Input sections up to stub_group_size
11795 bytes before the stub section can be handled by it too.
11796 Don't do this if we have a really large section after the
11797 stubs, as adding more stubs increases the chance that
11798 branches may not reach into the stub section. */
11799 if (!stubs_always_before_branch && !big_sec)
11800 {
11801 total = 0;
11802 while (prev != NULL
11803 && ((total += tail->output_offset - prev->output_offset)
11804 < (ppc64_elf_section_data (prev) != NULL
11805 && ppc64_elf_section_data (prev)->has_14bit_branch
11806 ? stub14_group_size : stub_group_size))
11807 && htab->stub_group[prev->id].toc_off == curr_toc)
11808 {
11809 tail = prev;
11810 prev = PREV_SEC (tail);
11811 htab->stub_group[tail->id].link_sec = curr;
11812 }
11813 }
11814 tail = prev;
11815 }
11816 }
11817 while (list-- != htab->input_list);
11818 free (htab->input_list);
11819 #undef PREV_SEC
11820 }
11821
11822 static const unsigned char glink_eh_frame_cie[] =
11823 {
11824 0, 0, 0, 16, /* length. */
11825 0, 0, 0, 0, /* id. */
11826 1, /* CIE version. */
11827 'z', 'R', 0, /* Augmentation string. */
11828 4, /* Code alignment. */
11829 0x78, /* Data alignment. */
11830 65, /* RA reg. */
11831 1, /* Augmentation size. */
11832 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11833 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11834 };
11835
11836 /* Stripping output sections is normally done before dynamic section
11837 symbols have been allocated. This function is called later, and
11838 handles cases like htab->brlt which is mapped to its own output
11839 section. */
11840
11841 static void
11842 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11843 {
11844 if (isec->size == 0
11845 && isec->output_section->size == 0
11846 && !(isec->output_section->flags & SEC_KEEP)
11847 && !bfd_section_removed_from_list (info->output_bfd,
11848 isec->output_section)
11849 && elf_section_data (isec->output_section)->dynindx == 0)
11850 {
11851 isec->output_section->flags |= SEC_EXCLUDE;
11852 bfd_section_list_remove (info->output_bfd, isec->output_section);
11853 info->output_bfd->section_count--;
11854 }
11855 }
11856
11857 /* Determine and set the size of the stub section for a final link.
11858
11859 The basic idea here is to examine all the relocations looking for
11860 PC-relative calls to a target that is unreachable with a "bl"
11861 instruction. */
11862
11863 bfd_boolean
11864 ppc64_elf_size_stubs (struct bfd_link_info *info)
11865 {
11866 bfd_size_type stub_group_size;
11867 bfd_boolean stubs_always_before_branch;
11868 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11869
11870 if (htab == NULL)
11871 return FALSE;
11872
11873 if (htab->params->plt_thread_safe == -1 && !info->executable)
11874 htab->params->plt_thread_safe = 1;
11875 if (!htab->opd_abi)
11876 htab->params->plt_thread_safe = 0;
11877 else if (htab->params->plt_thread_safe == -1)
11878 {
11879 static const char *const thread_starter[] =
11880 {
11881 "pthread_create",
11882 /* libstdc++ */
11883 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11884 /* librt */
11885 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11886 "mq_notify", "create_timer",
11887 /* libanl */
11888 "getaddrinfo_a",
11889 /* libgomp */
11890 "GOMP_parallel_start",
11891 "GOMP_parallel_loop_static_start",
11892 "GOMP_parallel_loop_dynamic_start",
11893 "GOMP_parallel_loop_guided_start",
11894 "GOMP_parallel_loop_runtime_start",
11895 "GOMP_parallel_sections_start",
11896 };
11897 unsigned i;
11898
11899 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11900 {
11901 struct elf_link_hash_entry *h;
11902 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11903 FALSE, FALSE, TRUE);
11904 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
11905 if (htab->params->plt_thread_safe)
11906 break;
11907 }
11908 }
11909 stubs_always_before_branch = htab->params->group_size < 0;
11910 if (htab->params->group_size < 0)
11911 stub_group_size = -htab->params->group_size;
11912 else
11913 stub_group_size = htab->params->group_size;
11914
11915 group_sections (htab, stub_group_size, stubs_always_before_branch);
11916
11917 while (1)
11918 {
11919 bfd *input_bfd;
11920 unsigned int bfd_indx;
11921 asection *stub_sec;
11922
11923 htab->stub_iteration += 1;
11924
11925 for (input_bfd = info->input_bfds, bfd_indx = 0;
11926 input_bfd != NULL;
11927 input_bfd = input_bfd->link_next, bfd_indx++)
11928 {
11929 Elf_Internal_Shdr *symtab_hdr;
11930 asection *section;
11931 Elf_Internal_Sym *local_syms = NULL;
11932
11933 if (!is_ppc64_elf (input_bfd))
11934 continue;
11935
11936 /* We'll need the symbol table in a second. */
11937 symtab_hdr = &elf_symtab_hdr (input_bfd);
11938 if (symtab_hdr->sh_info == 0)
11939 continue;
11940
11941 /* Walk over each section attached to the input bfd. */
11942 for (section = input_bfd->sections;
11943 section != NULL;
11944 section = section->next)
11945 {
11946 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11947
11948 /* If there aren't any relocs, then there's nothing more
11949 to do. */
11950 if ((section->flags & SEC_RELOC) == 0
11951 || (section->flags & SEC_ALLOC) == 0
11952 || (section->flags & SEC_LOAD) == 0
11953 || (section->flags & SEC_CODE) == 0
11954 || section->reloc_count == 0)
11955 continue;
11956
11957 /* If this section is a link-once section that will be
11958 discarded, then don't create any stubs. */
11959 if (section->output_section == NULL
11960 || section->output_section->owner != info->output_bfd)
11961 continue;
11962
11963 /* Get the relocs. */
11964 internal_relocs
11965 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11966 info->keep_memory);
11967 if (internal_relocs == NULL)
11968 goto error_ret_free_local;
11969
11970 /* Now examine each relocation. */
11971 irela = internal_relocs;
11972 irelaend = irela + section->reloc_count;
11973 for (; irela < irelaend; irela++)
11974 {
11975 enum elf_ppc64_reloc_type r_type;
11976 unsigned int r_indx;
11977 enum ppc_stub_type stub_type;
11978 struct ppc_stub_hash_entry *stub_entry;
11979 asection *sym_sec, *code_sec;
11980 bfd_vma sym_value, code_value;
11981 bfd_vma destination;
11982 unsigned long local_off;
11983 bfd_boolean ok_dest;
11984 struct ppc_link_hash_entry *hash;
11985 struct ppc_link_hash_entry *fdh;
11986 struct elf_link_hash_entry *h;
11987 Elf_Internal_Sym *sym;
11988 char *stub_name;
11989 const asection *id_sec;
11990 struct _opd_sec_data *opd;
11991 struct plt_entry *plt_ent;
11992
11993 r_type = ELF64_R_TYPE (irela->r_info);
11994 r_indx = ELF64_R_SYM (irela->r_info);
11995
11996 if (r_type >= R_PPC64_max)
11997 {
11998 bfd_set_error (bfd_error_bad_value);
11999 goto error_ret_free_internal;
12000 }
12001
12002 /* Only look for stubs on branch instructions. */
12003 if (r_type != R_PPC64_REL24
12004 && r_type != R_PPC64_REL14
12005 && r_type != R_PPC64_REL14_BRTAKEN
12006 && r_type != R_PPC64_REL14_BRNTAKEN)
12007 continue;
12008
12009 /* Now determine the call target, its name, value,
12010 section. */
12011 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12012 r_indx, input_bfd))
12013 goto error_ret_free_internal;
12014 hash = (struct ppc_link_hash_entry *) h;
12015
12016 ok_dest = FALSE;
12017 fdh = NULL;
12018 sym_value = 0;
12019 if (hash == NULL)
12020 {
12021 sym_value = sym->st_value;
12022 ok_dest = TRUE;
12023 }
12024 else if (hash->elf.root.type == bfd_link_hash_defined
12025 || hash->elf.root.type == bfd_link_hash_defweak)
12026 {
12027 sym_value = hash->elf.root.u.def.value;
12028 if (sym_sec->output_section != NULL)
12029 ok_dest = TRUE;
12030 }
12031 else if (hash->elf.root.type == bfd_link_hash_undefweak
12032 || hash->elf.root.type == bfd_link_hash_undefined)
12033 {
12034 /* Recognise an old ABI func code entry sym, and
12035 use the func descriptor sym instead if it is
12036 defined. */
12037 if (hash->elf.root.root.string[0] == '.'
12038 && (fdh = lookup_fdh (hash, htab)) != NULL)
12039 {
12040 if (fdh->elf.root.type == bfd_link_hash_defined
12041 || fdh->elf.root.type == bfd_link_hash_defweak)
12042 {
12043 sym_sec = fdh->elf.root.u.def.section;
12044 sym_value = fdh->elf.root.u.def.value;
12045 if (sym_sec->output_section != NULL)
12046 ok_dest = TRUE;
12047 }
12048 else
12049 fdh = NULL;
12050 }
12051 }
12052 else
12053 {
12054 bfd_set_error (bfd_error_bad_value);
12055 goto error_ret_free_internal;
12056 }
12057
12058 destination = 0;
12059 local_off = 0;
12060 if (ok_dest)
12061 {
12062 sym_value += irela->r_addend;
12063 destination = (sym_value
12064 + sym_sec->output_offset
12065 + sym_sec->output_section->vma);
12066 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12067 ? hash->elf.other
12068 : sym->st_other);
12069 }
12070
12071 code_sec = sym_sec;
12072 code_value = sym_value;
12073 opd = get_opd_info (sym_sec);
12074 if (opd != NULL)
12075 {
12076 bfd_vma dest;
12077
12078 if (hash == NULL && opd->adjust != NULL)
12079 {
12080 long adjust = opd->adjust[sym_value / 8];
12081 if (adjust == -1)
12082 continue;
12083 code_value += adjust;
12084 sym_value += adjust;
12085 }
12086 dest = opd_entry_value (sym_sec, sym_value,
12087 &code_sec, &code_value, FALSE);
12088 if (dest != (bfd_vma) -1)
12089 {
12090 destination = dest;
12091 if (fdh != NULL)
12092 {
12093 /* Fixup old ABI sym to point at code
12094 entry. */
12095 hash->elf.root.type = bfd_link_hash_defweak;
12096 hash->elf.root.u.def.section = code_sec;
12097 hash->elf.root.u.def.value = code_value;
12098 }
12099 }
12100 }
12101
12102 /* Determine what (if any) linker stub is needed. */
12103 plt_ent = NULL;
12104 stub_type = ppc_type_of_stub (section, irela, &hash,
12105 &plt_ent, destination,
12106 local_off);
12107
12108 if (stub_type != ppc_stub_plt_call)
12109 {
12110 /* Check whether we need a TOC adjusting stub.
12111 Since the linker pastes together pieces from
12112 different object files when creating the
12113 _init and _fini functions, it may be that a
12114 call to what looks like a local sym is in
12115 fact a call needing a TOC adjustment. */
12116 if (code_sec != NULL
12117 && code_sec->output_section != NULL
12118 && (htab->stub_group[code_sec->id].toc_off
12119 != htab->stub_group[section->id].toc_off)
12120 && (code_sec->has_toc_reloc
12121 || code_sec->makes_toc_func_call))
12122 stub_type = ppc_stub_long_branch_r2off;
12123 }
12124
12125 if (stub_type == ppc_stub_none)
12126 continue;
12127
12128 /* __tls_get_addr calls might be eliminated. */
12129 if (stub_type != ppc_stub_plt_call
12130 && hash != NULL
12131 && (hash == htab->tls_get_addr
12132 || hash == htab->tls_get_addr_fd)
12133 && section->has_tls_reloc
12134 && irela != internal_relocs)
12135 {
12136 /* Get tls info. */
12137 unsigned char *tls_mask;
12138
12139 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12140 irela - 1, input_bfd))
12141 goto error_ret_free_internal;
12142 if (*tls_mask != 0)
12143 continue;
12144 }
12145
12146 if (stub_type == ppc_stub_plt_call
12147 && irela + 1 < irelaend
12148 && irela[1].r_offset == irela->r_offset + 4
12149 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12150 {
12151 if (!tocsave_find (htab, INSERT,
12152 &local_syms, irela + 1, input_bfd))
12153 goto error_ret_free_internal;
12154 }
12155 else if (stub_type == ppc_stub_plt_call)
12156 stub_type = ppc_stub_plt_call_r2save;
12157
12158 /* Support for grouping stub sections. */
12159 id_sec = htab->stub_group[section->id].link_sec;
12160
12161 /* Get the name of this stub. */
12162 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12163 if (!stub_name)
12164 goto error_ret_free_internal;
12165
12166 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12167 stub_name, FALSE, FALSE);
12168 if (stub_entry != NULL)
12169 {
12170 /* The proper stub has already been created. */
12171 free (stub_name);
12172 if (stub_type == ppc_stub_plt_call_r2save)
12173 stub_entry->stub_type = stub_type;
12174 continue;
12175 }
12176
12177 stub_entry = ppc_add_stub (stub_name, section, info);
12178 if (stub_entry == NULL)
12179 {
12180 free (stub_name);
12181 error_ret_free_internal:
12182 if (elf_section_data (section)->relocs == NULL)
12183 free (internal_relocs);
12184 error_ret_free_local:
12185 if (local_syms != NULL
12186 && (symtab_hdr->contents
12187 != (unsigned char *) local_syms))
12188 free (local_syms);
12189 return FALSE;
12190 }
12191
12192 stub_entry->stub_type = stub_type;
12193 if (stub_type != ppc_stub_plt_call
12194 && stub_type != ppc_stub_plt_call_r2save)
12195 {
12196 stub_entry->target_value = code_value;
12197 stub_entry->target_section = code_sec;
12198 }
12199 else
12200 {
12201 stub_entry->target_value = sym_value;
12202 stub_entry->target_section = sym_sec;
12203 }
12204 stub_entry->h = hash;
12205 stub_entry->plt_ent = plt_ent;
12206 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12207
12208 if (stub_entry->h != NULL)
12209 htab->stub_globals += 1;
12210 }
12211
12212 /* We're done with the internal relocs, free them. */
12213 if (elf_section_data (section)->relocs != internal_relocs)
12214 free (internal_relocs);
12215 }
12216
12217 if (local_syms != NULL
12218 && symtab_hdr->contents != (unsigned char *) local_syms)
12219 {
12220 if (!info->keep_memory)
12221 free (local_syms);
12222 else
12223 symtab_hdr->contents = (unsigned char *) local_syms;
12224 }
12225 }
12226
12227 /* We may have added some stubs. Find out the new size of the
12228 stub sections. */
12229 for (stub_sec = htab->params->stub_bfd->sections;
12230 stub_sec != NULL;
12231 stub_sec = stub_sec->next)
12232 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12233 {
12234 stub_sec->rawsize = stub_sec->size;
12235 stub_sec->size = 0;
12236 stub_sec->reloc_count = 0;
12237 stub_sec->flags &= ~SEC_RELOC;
12238 }
12239
12240 htab->brlt->size = 0;
12241 htab->brlt->reloc_count = 0;
12242 htab->brlt->flags &= ~SEC_RELOC;
12243 if (htab->relbrlt != NULL)
12244 htab->relbrlt->size = 0;
12245
12246 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12247
12248 if (info->emitrelocations
12249 && htab->glink != NULL && htab->glink->size != 0)
12250 {
12251 htab->glink->reloc_count = 1;
12252 htab->glink->flags |= SEC_RELOC;
12253 }
12254
12255 if (htab->glink_eh_frame != NULL
12256 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12257 && htab->glink_eh_frame->output_section->size != 0)
12258 {
12259 size_t size = 0, align;
12260
12261 for (stub_sec = htab->params->stub_bfd->sections;
12262 stub_sec != NULL;
12263 stub_sec = stub_sec->next)
12264 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12265 size += 20;
12266 if (htab->glink != NULL && htab->glink->size != 0)
12267 size += 24;
12268 if (size != 0)
12269 size += sizeof (glink_eh_frame_cie);
12270 align = 1;
12271 align <<= htab->glink_eh_frame->output_section->alignment_power;
12272 align -= 1;
12273 size = (size + align) & ~align;
12274 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12275 htab->glink_eh_frame->size = size;
12276 }
12277
12278 if (htab->params->plt_stub_align != 0)
12279 for (stub_sec = htab->params->stub_bfd->sections;
12280 stub_sec != NULL;
12281 stub_sec = stub_sec->next)
12282 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12283 stub_sec->size = ((stub_sec->size
12284 + (1 << htab->params->plt_stub_align) - 1)
12285 & (-1 << htab->params->plt_stub_align));
12286
12287 for (stub_sec = htab->params->stub_bfd->sections;
12288 stub_sec != NULL;
12289 stub_sec = stub_sec->next)
12290 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12291 && stub_sec->rawsize != stub_sec->size)
12292 break;
12293
12294 /* Exit from this loop when no stubs have been added, and no stubs
12295 have changed size. */
12296 if (stub_sec == NULL
12297 && (htab->glink_eh_frame == NULL
12298 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12299 break;
12300
12301 /* Ask the linker to do its stuff. */
12302 (*htab->params->layout_sections_again) ();
12303 }
12304
12305 maybe_strip_output (info, htab->brlt);
12306 if (htab->glink_eh_frame != NULL)
12307 maybe_strip_output (info, htab->glink_eh_frame);
12308
12309 return TRUE;
12310 }
12311
12312 /* Called after we have determined section placement. If sections
12313 move, we'll be called again. Provide a value for TOCstart. */
12314
12315 bfd_vma
12316 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12317 {
12318 asection *s;
12319 bfd_vma TOCstart;
12320
12321 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12322 order. The TOC starts where the first of these sections starts. */
12323 s = bfd_get_section_by_name (obfd, ".got");
12324 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12325 s = bfd_get_section_by_name (obfd, ".toc");
12326 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12327 s = bfd_get_section_by_name (obfd, ".tocbss");
12328 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12329 s = bfd_get_section_by_name (obfd, ".plt");
12330 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12331 {
12332 /* This may happen for
12333 o references to TOC base (SYM@toc / TOC[tc0]) without a
12334 .toc directive
12335 o bad linker script
12336 o --gc-sections and empty TOC sections
12337
12338 FIXME: Warn user? */
12339
12340 /* Look for a likely section. We probably won't even be
12341 using TOCstart. */
12342 for (s = obfd->sections; s != NULL; s = s->next)
12343 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12344 | SEC_EXCLUDE))
12345 == (SEC_ALLOC | SEC_SMALL_DATA))
12346 break;
12347 if (s == NULL)
12348 for (s = obfd->sections; s != NULL; s = s->next)
12349 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12350 == (SEC_ALLOC | SEC_SMALL_DATA))
12351 break;
12352 if (s == NULL)
12353 for (s = obfd->sections; s != NULL; s = s->next)
12354 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12355 == SEC_ALLOC)
12356 break;
12357 if (s == NULL)
12358 for (s = obfd->sections; s != NULL; s = s->next)
12359 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12360 break;
12361 }
12362
12363 TOCstart = 0;
12364 if (s != NULL)
12365 TOCstart = s->output_section->vma + s->output_offset;
12366
12367 _bfd_set_gp_value (obfd, TOCstart);
12368
12369 if (info != NULL && s != NULL && is_ppc64_elf (obfd))
12370 {
12371 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12372
12373 if (htab != NULL
12374 && htab->elf.hgot != NULL)
12375 {
12376 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
12377 htab->elf.hgot->root.u.def.section = s;
12378 }
12379 }
12380 return TOCstart;
12381 }
12382
12383 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12384 write out any global entry stubs. */
12385
12386 static bfd_boolean
12387 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12388 {
12389 struct bfd_link_info *info;
12390 struct ppc_link_hash_table *htab;
12391 struct plt_entry *pent;
12392 asection *s;
12393
12394 if (h->root.type == bfd_link_hash_indirect)
12395 return TRUE;
12396
12397 if (!h->pointer_equality_needed)
12398 return TRUE;
12399
12400 if (h->def_regular)
12401 return TRUE;
12402
12403 info = inf;
12404 htab = ppc_hash_table (info);
12405 if (htab == NULL)
12406 return FALSE;
12407
12408 s = htab->glink;
12409 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12410 if (pent->plt.offset != (bfd_vma) -1
12411 && pent->addend == 0)
12412 {
12413 bfd_byte *p;
12414 asection *plt;
12415 bfd_vma off;
12416
12417 p = s->contents + h->root.u.def.value;
12418 plt = htab->elf.splt;
12419 if (!htab->elf.dynamic_sections_created
12420 || h->dynindx == -1)
12421 plt = htab->elf.iplt;
12422 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12423 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12424
12425 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12426 {
12427 info->callbacks->einfo
12428 (_("%P: linkage table error against `%T'\n"),
12429 h->root.root.string);
12430 bfd_set_error (bfd_error_bad_value);
12431 htab->stub_error = TRUE;
12432 }
12433
12434 if (PPC_HA (off) != 0)
12435 {
12436 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12437 p += 4;
12438 }
12439 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12440 p += 4;
12441 bfd_put_32 (s->owner, MTCTR_R12, p);
12442 p += 4;
12443 bfd_put_32 (s->owner, BCTR, p);
12444 break;
12445 }
12446 return TRUE;
12447 }
12448
12449 /* Build all the stubs associated with the current output file.
12450 The stubs are kept in a hash table attached to the main linker
12451 hash table. This function is called via gldelf64ppc_finish. */
12452
12453 bfd_boolean
12454 ppc64_elf_build_stubs (struct bfd_link_info *info,
12455 char **stats)
12456 {
12457 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12458 asection *stub_sec;
12459 bfd_byte *p;
12460 int stub_sec_count = 0;
12461
12462 if (htab == NULL)
12463 return FALSE;
12464
12465 /* Allocate memory to hold the linker stubs. */
12466 for (stub_sec = htab->params->stub_bfd->sections;
12467 stub_sec != NULL;
12468 stub_sec = stub_sec->next)
12469 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12470 && stub_sec->size != 0)
12471 {
12472 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12473 if (stub_sec->contents == NULL)
12474 return FALSE;
12475 /* We want to check that built size is the same as calculated
12476 size. rawsize is a convenient location to use. */
12477 stub_sec->rawsize = stub_sec->size;
12478 stub_sec->size = 0;
12479 }
12480
12481 if (htab->glink != NULL && htab->glink->size != 0)
12482 {
12483 unsigned int indx;
12484 bfd_vma plt0;
12485
12486 /* Build the .glink plt call stub. */
12487 if (htab->params->emit_stub_syms)
12488 {
12489 struct elf_link_hash_entry *h;
12490 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12491 TRUE, FALSE, FALSE);
12492 if (h == NULL)
12493 return FALSE;
12494 if (h->root.type == bfd_link_hash_new)
12495 {
12496 h->root.type = bfd_link_hash_defined;
12497 h->root.u.def.section = htab->glink;
12498 h->root.u.def.value = 8;
12499 h->ref_regular = 1;
12500 h->def_regular = 1;
12501 h->ref_regular_nonweak = 1;
12502 h->forced_local = 1;
12503 h->non_elf = 0;
12504 }
12505 }
12506 plt0 = (htab->elf.splt->output_section->vma
12507 + htab->elf.splt->output_offset
12508 - 16);
12509 if (info->emitrelocations)
12510 {
12511 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12512 if (r == NULL)
12513 return FALSE;
12514 r->r_offset = (htab->glink->output_offset
12515 + htab->glink->output_section->vma);
12516 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12517 r->r_addend = plt0;
12518 }
12519 p = htab->glink->contents;
12520 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12521 bfd_put_64 (htab->glink->owner, plt0, p);
12522 p += 8;
12523 if (htab->opd_abi)
12524 {
12525 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12526 p += 4;
12527 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12528 p += 4;
12529 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12530 p += 4;
12531 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12532 p += 4;
12533 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12534 p += 4;
12535 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12536 p += 4;
12537 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12538 p += 4;
12539 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12540 p += 4;
12541 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12542 p += 4;
12543 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12544 p += 4;
12545 }
12546 else
12547 {
12548 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12549 p += 4;
12550 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12551 p += 4;
12552 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12553 p += 4;
12554 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12555 p += 4;
12556 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12557 p += 4;
12558 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
12559 p += 4;
12560 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12561 p += 4;
12562 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
12563 p += 4;
12564 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12565 p += 4;
12566 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
12567 p += 4;
12568 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12569 p += 4;
12570 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
12571 p += 4;
12572 }
12573 bfd_put_32 (htab->glink->owner, BCTR, p);
12574 p += 4;
12575 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12576 {
12577 bfd_put_32 (htab->glink->owner, NOP, p);
12578 p += 4;
12579 }
12580
12581 /* Build the .glink lazy link call stubs. */
12582 indx = 0;
12583 while (p < htab->glink->contents + htab->glink->rawsize)
12584 {
12585 if (htab->opd_abi)
12586 {
12587 if (indx < 0x8000)
12588 {
12589 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12590 p += 4;
12591 }
12592 else
12593 {
12594 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12595 p += 4;
12596 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
12597 p);
12598 p += 4;
12599 }
12600 }
12601 bfd_put_32 (htab->glink->owner,
12602 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12603 indx++;
12604 p += 4;
12605 }
12606
12607 /* Build .glink global entry stubs. */
12608 if (htab->glink->size > htab->glink->rawsize)
12609 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
12610 }
12611
12612 if (htab->brlt->size != 0)
12613 {
12614 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12615 htab->brlt->size);
12616 if (htab->brlt->contents == NULL)
12617 return FALSE;
12618 }
12619 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12620 {
12621 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12622 htab->relbrlt->size);
12623 if (htab->relbrlt->contents == NULL)
12624 return FALSE;
12625 }
12626
12627 if (htab->glink_eh_frame != NULL
12628 && htab->glink_eh_frame->size != 0)
12629 {
12630 bfd_vma val;
12631 bfd_byte *last_fde;
12632 size_t last_fde_len, size, align, pad;
12633
12634 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12635 if (p == NULL)
12636 return FALSE;
12637 htab->glink_eh_frame->contents = p;
12638 last_fde = p;
12639
12640 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12641
12642 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12643 /* CIE length (rewrite in case little-endian). */
12644 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12645 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12646 p += sizeof (glink_eh_frame_cie);
12647
12648 for (stub_sec = htab->params->stub_bfd->sections;
12649 stub_sec != NULL;
12650 stub_sec = stub_sec->next)
12651 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12652 {
12653 last_fde = p;
12654 last_fde_len = 16;
12655 /* FDE length. */
12656 bfd_put_32 (htab->elf.dynobj, 16, p);
12657 p += 4;
12658 /* CIE pointer. */
12659 val = p - htab->glink_eh_frame->contents;
12660 bfd_put_32 (htab->elf.dynobj, val, p);
12661 p += 4;
12662 /* Offset to stub section. */
12663 val = (stub_sec->output_section->vma
12664 + stub_sec->output_offset);
12665 val -= (htab->glink_eh_frame->output_section->vma
12666 + htab->glink_eh_frame->output_offset);
12667 val -= p - htab->glink_eh_frame->contents;
12668 if (val + 0x80000000 > 0xffffffff)
12669 {
12670 info->callbacks->einfo
12671 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12672 stub_sec->name);
12673 return FALSE;
12674 }
12675 bfd_put_32 (htab->elf.dynobj, val, p);
12676 p += 4;
12677 /* stub section size. */
12678 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12679 p += 4;
12680 /* Augmentation. */
12681 p += 1;
12682 /* Pad. */
12683 p += 3;
12684 }
12685 if (htab->glink != NULL && htab->glink->size != 0)
12686 {
12687 last_fde = p;
12688 last_fde_len = 20;
12689 /* FDE length. */
12690 bfd_put_32 (htab->elf.dynobj, 20, p);
12691 p += 4;
12692 /* CIE pointer. */
12693 val = p - htab->glink_eh_frame->contents;
12694 bfd_put_32 (htab->elf.dynobj, val, p);
12695 p += 4;
12696 /* Offset to .glink. */
12697 val = (htab->glink->output_section->vma
12698 + htab->glink->output_offset
12699 + 8);
12700 val -= (htab->glink_eh_frame->output_section->vma
12701 + htab->glink_eh_frame->output_offset);
12702 val -= p - htab->glink_eh_frame->contents;
12703 if (val + 0x80000000 > 0xffffffff)
12704 {
12705 info->callbacks->einfo
12706 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12707 htab->glink->name);
12708 return FALSE;
12709 }
12710 bfd_put_32 (htab->elf.dynobj, val, p);
12711 p += 4;
12712 /* .glink size. */
12713 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12714 p += 4;
12715 /* Augmentation. */
12716 p += 1;
12717
12718 *p++ = DW_CFA_advance_loc + 1;
12719 *p++ = DW_CFA_register;
12720 *p++ = 65;
12721 *p++ = 12;
12722 *p++ = DW_CFA_advance_loc + 4;
12723 *p++ = DW_CFA_restore_extended;
12724 *p++ = 65;
12725 }
12726 /* Subsume any padding into the last FDE if user .eh_frame
12727 sections are aligned more than glink_eh_frame. Otherwise any
12728 zero padding will be seen as a terminator. */
12729 size = p - htab->glink_eh_frame->contents;
12730 align = 1;
12731 align <<= htab->glink_eh_frame->output_section->alignment_power;
12732 align -= 1;
12733 pad = ((size + align) & ~align) - size;
12734 htab->glink_eh_frame->size = size + pad;
12735 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12736 }
12737
12738 /* Build the stubs as directed by the stub hash table. */
12739 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12740
12741 if (htab->relbrlt != NULL)
12742 htab->relbrlt->reloc_count = 0;
12743
12744 if (htab->params->plt_stub_align != 0)
12745 for (stub_sec = htab->params->stub_bfd->sections;
12746 stub_sec != NULL;
12747 stub_sec = stub_sec->next)
12748 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12749 stub_sec->size = ((stub_sec->size
12750 + (1 << htab->params->plt_stub_align) - 1)
12751 & (-1 << htab->params->plt_stub_align));
12752
12753 for (stub_sec = htab->params->stub_bfd->sections;
12754 stub_sec != NULL;
12755 stub_sec = stub_sec->next)
12756 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12757 {
12758 stub_sec_count += 1;
12759 if (stub_sec->rawsize != stub_sec->size)
12760 break;
12761 }
12762
12763 if (stub_sec != NULL
12764 || (htab->glink_eh_frame != NULL
12765 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12766 {
12767 htab->stub_error = TRUE;
12768 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12769 }
12770
12771 if (htab->stub_error)
12772 return FALSE;
12773
12774 if (stats != NULL)
12775 {
12776 *stats = bfd_malloc (500);
12777 if (*stats == NULL)
12778 return FALSE;
12779
12780 sprintf (*stats, _("linker stubs in %u group%s\n"
12781 " branch %lu\n"
12782 " toc adjust %lu\n"
12783 " long branch %lu\n"
12784 " long toc adj %lu\n"
12785 " plt call %lu\n"
12786 " plt call toc %lu"),
12787 stub_sec_count,
12788 stub_sec_count == 1 ? "" : "s",
12789 htab->stub_count[ppc_stub_long_branch - 1],
12790 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12791 htab->stub_count[ppc_stub_plt_branch - 1],
12792 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12793 htab->stub_count[ppc_stub_plt_call - 1],
12794 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12795 }
12796 return TRUE;
12797 }
12798
12799 /* This function undoes the changes made by add_symbol_adjust. */
12800
12801 static bfd_boolean
12802 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12803 {
12804 struct ppc_link_hash_entry *eh;
12805
12806 if (h->root.type == bfd_link_hash_indirect)
12807 return TRUE;
12808
12809 eh = (struct ppc_link_hash_entry *) h;
12810 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12811 return TRUE;
12812
12813 eh->elf.root.type = bfd_link_hash_undefined;
12814 return TRUE;
12815 }
12816
12817 void
12818 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12819 {
12820 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12821
12822 if (htab != NULL)
12823 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12824 }
12825
12826 /* What to do when ld finds relocations against symbols defined in
12827 discarded sections. */
12828
12829 static unsigned int
12830 ppc64_elf_action_discarded (asection *sec)
12831 {
12832 if (strcmp (".opd", sec->name) == 0)
12833 return 0;
12834
12835 if (strcmp (".toc", sec->name) == 0)
12836 return 0;
12837
12838 if (strcmp (".toc1", sec->name) == 0)
12839 return 0;
12840
12841 return _bfd_elf_default_action_discarded (sec);
12842 }
12843
12844 /* The RELOCATE_SECTION function is called by the ELF backend linker
12845 to handle the relocations for a section.
12846
12847 The relocs are always passed as Rela structures; if the section
12848 actually uses Rel structures, the r_addend field will always be
12849 zero.
12850
12851 This function is responsible for adjust the section contents as
12852 necessary, and (if using Rela relocs and generating a
12853 relocatable output file) adjusting the reloc addend as
12854 necessary.
12855
12856 This function does not have to worry about setting the reloc
12857 address or the reloc symbol index.
12858
12859 LOCAL_SYMS is a pointer to the swapped in local symbols.
12860
12861 LOCAL_SECTIONS is an array giving the section in the input file
12862 corresponding to the st_shndx field of each local symbol.
12863
12864 The global hash table entry for the global symbols can be found
12865 via elf_sym_hashes (input_bfd).
12866
12867 When generating relocatable output, this function must handle
12868 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12869 going to be the section symbol corresponding to the output
12870 section, which means that the addend must be adjusted
12871 accordingly. */
12872
12873 static bfd_boolean
12874 ppc64_elf_relocate_section (bfd *output_bfd,
12875 struct bfd_link_info *info,
12876 bfd *input_bfd,
12877 asection *input_section,
12878 bfd_byte *contents,
12879 Elf_Internal_Rela *relocs,
12880 Elf_Internal_Sym *local_syms,
12881 asection **local_sections)
12882 {
12883 struct ppc_link_hash_table *htab;
12884 Elf_Internal_Shdr *symtab_hdr;
12885 struct elf_link_hash_entry **sym_hashes;
12886 Elf_Internal_Rela *rel;
12887 Elf_Internal_Rela *relend;
12888 Elf_Internal_Rela outrel;
12889 bfd_byte *loc;
12890 struct got_entry **local_got_ents;
12891 bfd_vma TOCstart;
12892 bfd_boolean ret = TRUE;
12893 bfd_boolean is_opd;
12894 /* Assume 'at' branch hints. */
12895 bfd_boolean is_isa_v2 = TRUE;
12896 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12897
12898 /* Initialize howto table if needed. */
12899 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12900 ppc_howto_init ();
12901
12902 htab = ppc_hash_table (info);
12903 if (htab == NULL)
12904 return FALSE;
12905
12906 /* Don't relocate stub sections. */
12907 if (input_section->owner == htab->params->stub_bfd)
12908 return TRUE;
12909
12910 BFD_ASSERT (is_ppc64_elf (input_bfd));
12911
12912 local_got_ents = elf_local_got_ents (input_bfd);
12913 TOCstart = elf_gp (output_bfd);
12914 symtab_hdr = &elf_symtab_hdr (input_bfd);
12915 sym_hashes = elf_sym_hashes (input_bfd);
12916 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12917
12918 rel = relocs;
12919 relend = relocs + input_section->reloc_count;
12920 for (; rel < relend; rel++)
12921 {
12922 enum elf_ppc64_reloc_type r_type;
12923 bfd_vma addend;
12924 bfd_reloc_status_type r;
12925 Elf_Internal_Sym *sym;
12926 asection *sec;
12927 struct elf_link_hash_entry *h_elf;
12928 struct ppc_link_hash_entry *h;
12929 struct ppc_link_hash_entry *fdh;
12930 const char *sym_name;
12931 unsigned long r_symndx, toc_symndx;
12932 bfd_vma toc_addend;
12933 unsigned char tls_mask, tls_gd, tls_type;
12934 unsigned char sym_type;
12935 bfd_vma relocation;
12936 bfd_boolean unresolved_reloc;
12937 bfd_boolean warned;
12938 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12939 unsigned int insn;
12940 unsigned int mask;
12941 struct ppc_stub_hash_entry *stub_entry;
12942 bfd_vma max_br_offset;
12943 bfd_vma from;
12944 const Elf_Internal_Rela orig_rel = *rel;
12945 reloc_howto_type *howto;
12946 struct reloc_howto_struct alt_howto;
12947
12948 r_type = ELF64_R_TYPE (rel->r_info);
12949 r_symndx = ELF64_R_SYM (rel->r_info);
12950
12951 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12952 symbol of the previous ADDR64 reloc. The symbol gives us the
12953 proper TOC base to use. */
12954 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12955 && rel != relocs
12956 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12957 && is_opd)
12958 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12959
12960 sym = NULL;
12961 sec = NULL;
12962 h_elf = NULL;
12963 sym_name = NULL;
12964 unresolved_reloc = FALSE;
12965 warned = FALSE;
12966
12967 if (r_symndx < symtab_hdr->sh_info)
12968 {
12969 /* It's a local symbol. */
12970 struct _opd_sec_data *opd;
12971
12972 sym = local_syms + r_symndx;
12973 sec = local_sections[r_symndx];
12974 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12975 sym_type = ELF64_ST_TYPE (sym->st_info);
12976 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12977 opd = get_opd_info (sec);
12978 if (opd != NULL && opd->adjust != NULL)
12979 {
12980 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12981 if (adjust == -1)
12982 relocation = 0;
12983 else
12984 {
12985 /* If this is a relocation against the opd section sym
12986 and we have edited .opd, adjust the reloc addend so
12987 that ld -r and ld --emit-relocs output is correct.
12988 If it is a reloc against some other .opd symbol,
12989 then the symbol value will be adjusted later. */
12990 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12991 rel->r_addend += adjust;
12992 else
12993 relocation += adjust;
12994 }
12995 }
12996 }
12997 else
12998 {
12999 bfd_boolean ignored;
13000
13001 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13002 r_symndx, symtab_hdr, sym_hashes,
13003 h_elf, sec, relocation,
13004 unresolved_reloc, warned, ignored);
13005 sym_name = h_elf->root.root.string;
13006 sym_type = h_elf->type;
13007 if (sec != NULL
13008 && sec->owner == output_bfd
13009 && strcmp (sec->name, ".opd") == 0)
13010 {
13011 /* This is a symbol defined in a linker script. All
13012 such are defined in output sections, even those
13013 defined by simple assignment from a symbol defined in
13014 an input section. Transfer the symbol to an
13015 appropriate input .opd section, so that a branch to
13016 this symbol will be mapped to the location specified
13017 by the opd entry. */
13018 struct bfd_link_order *lo;
13019 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13020 if (lo->type == bfd_indirect_link_order)
13021 {
13022 asection *isec = lo->u.indirect.section;
13023 if (h_elf->root.u.def.value >= isec->output_offset
13024 && h_elf->root.u.def.value < (isec->output_offset
13025 + isec->size))
13026 {
13027 h_elf->root.u.def.value -= isec->output_offset;
13028 h_elf->root.u.def.section = isec;
13029 sec = isec;
13030 break;
13031 }
13032 }
13033 }
13034 }
13035 h = (struct ppc_link_hash_entry *) h_elf;
13036
13037 if (sec != NULL && discarded_section (sec))
13038 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
13039 rel, 1, relend,
13040 ppc64_elf_howto_table[r_type], 0,
13041 contents);
13042
13043 if (info->relocatable)
13044 continue;
13045
13046 if (h != NULL && &h->elf == htab->elf.hgot)
13047 {
13048 relocation = (TOCstart
13049 + htab->stub_group[input_section->id].toc_off);
13050 sec = bfd_abs_section_ptr;
13051 unresolved_reloc = FALSE;
13052 }
13053
13054 /* TLS optimizations. Replace instruction sequences and relocs
13055 based on information we collected in tls_optimize. We edit
13056 RELOCS so that --emit-relocs will output something sensible
13057 for the final instruction stream. */
13058 tls_mask = 0;
13059 tls_gd = 0;
13060 toc_symndx = 0;
13061 if (h != NULL)
13062 tls_mask = h->tls_mask;
13063 else if (local_got_ents != NULL)
13064 {
13065 struct plt_entry **local_plt = (struct plt_entry **)
13066 (local_got_ents + symtab_hdr->sh_info);
13067 unsigned char *lgot_masks = (unsigned char *)
13068 (local_plt + symtab_hdr->sh_info);
13069 tls_mask = lgot_masks[r_symndx];
13070 }
13071 if (tls_mask == 0
13072 && (r_type == R_PPC64_TLS
13073 || r_type == R_PPC64_TLSGD
13074 || r_type == R_PPC64_TLSLD))
13075 {
13076 /* Check for toc tls entries. */
13077 unsigned char *toc_tls;
13078
13079 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13080 &local_syms, rel, input_bfd))
13081 return FALSE;
13082
13083 if (toc_tls)
13084 tls_mask = *toc_tls;
13085 }
13086
13087 /* Check that tls relocs are used with tls syms, and non-tls
13088 relocs are used with non-tls syms. */
13089 if (r_symndx != STN_UNDEF
13090 && r_type != R_PPC64_NONE
13091 && (h == NULL
13092 || h->elf.root.type == bfd_link_hash_defined
13093 || h->elf.root.type == bfd_link_hash_defweak)
13094 && (IS_PPC64_TLS_RELOC (r_type)
13095 != (sym_type == STT_TLS
13096 || (sym_type == STT_SECTION
13097 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13098 {
13099 if (tls_mask != 0
13100 && (r_type == R_PPC64_TLS
13101 || r_type == R_PPC64_TLSGD
13102 || r_type == R_PPC64_TLSLD))
13103 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13104 ;
13105 else
13106 info->callbacks->einfo
13107 (!IS_PPC64_TLS_RELOC (r_type)
13108 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13109 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13110 input_bfd, input_section, rel->r_offset,
13111 ppc64_elf_howto_table[r_type]->name,
13112 sym_name);
13113 }
13114
13115 /* Ensure reloc mapping code below stays sane. */
13116 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13117 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13118 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13119 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13120 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13121 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13122 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13123 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13124 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13125 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13126 abort ();
13127
13128 switch (r_type)
13129 {
13130 default:
13131 break;
13132
13133 case R_PPC64_LO_DS_OPT:
13134 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13135 if ((insn & (0x3f << 26)) != 58u << 26)
13136 abort ();
13137 insn += (14u << 26) - (58u << 26);
13138 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13139 r_type = R_PPC64_TOC16_LO;
13140 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13141 break;
13142
13143 case R_PPC64_TOC16:
13144 case R_PPC64_TOC16_LO:
13145 case R_PPC64_TOC16_DS:
13146 case R_PPC64_TOC16_LO_DS:
13147 {
13148 /* Check for toc tls entries. */
13149 unsigned char *toc_tls;
13150 int retval;
13151
13152 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13153 &local_syms, rel, input_bfd);
13154 if (retval == 0)
13155 return FALSE;
13156
13157 if (toc_tls)
13158 {
13159 tls_mask = *toc_tls;
13160 if (r_type == R_PPC64_TOC16_DS
13161 || r_type == R_PPC64_TOC16_LO_DS)
13162 {
13163 if (tls_mask != 0
13164 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13165 goto toctprel;
13166 }
13167 else
13168 {
13169 /* If we found a GD reloc pair, then we might be
13170 doing a GD->IE transition. */
13171 if (retval == 2)
13172 {
13173 tls_gd = TLS_TPRELGD;
13174 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13175 goto tls_ldgd_opt;
13176 }
13177 else if (retval == 3)
13178 {
13179 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13180 goto tls_ldgd_opt;
13181 }
13182 }
13183 }
13184 }
13185 break;
13186
13187 case R_PPC64_GOT_TPREL16_HI:
13188 case R_PPC64_GOT_TPREL16_HA:
13189 if (tls_mask != 0
13190 && (tls_mask & TLS_TPREL) == 0)
13191 {
13192 rel->r_offset -= d_offset;
13193 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13194 r_type = R_PPC64_NONE;
13195 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13196 }
13197 break;
13198
13199 case R_PPC64_GOT_TPREL16_DS:
13200 case R_PPC64_GOT_TPREL16_LO_DS:
13201 if (tls_mask != 0
13202 && (tls_mask & TLS_TPREL) == 0)
13203 {
13204 toctprel:
13205 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13206 insn &= 31 << 21;
13207 insn |= 0x3c0d0000; /* addis 0,13,0 */
13208 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13209 r_type = R_PPC64_TPREL16_HA;
13210 if (toc_symndx != 0)
13211 {
13212 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13213 rel->r_addend = toc_addend;
13214 /* We changed the symbol. Start over in order to
13215 get h, sym, sec etc. right. */
13216 rel--;
13217 continue;
13218 }
13219 else
13220 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13221 }
13222 break;
13223
13224 case R_PPC64_TLS:
13225 if (tls_mask != 0
13226 && (tls_mask & TLS_TPREL) == 0)
13227 {
13228 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13229 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13230 if (insn == 0)
13231 abort ();
13232 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13233 /* Was PPC64_TLS which sits on insn boundary, now
13234 PPC64_TPREL16_LO which is at low-order half-word. */
13235 rel->r_offset += d_offset;
13236 r_type = R_PPC64_TPREL16_LO;
13237 if (toc_symndx != 0)
13238 {
13239 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13240 rel->r_addend = toc_addend;
13241 /* We changed the symbol. Start over in order to
13242 get h, sym, sec etc. right. */
13243 rel--;
13244 continue;
13245 }
13246 else
13247 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13248 }
13249 break;
13250
13251 case R_PPC64_GOT_TLSGD16_HI:
13252 case R_PPC64_GOT_TLSGD16_HA:
13253 tls_gd = TLS_TPRELGD;
13254 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13255 goto tls_gdld_hi;
13256 break;
13257
13258 case R_PPC64_GOT_TLSLD16_HI:
13259 case R_PPC64_GOT_TLSLD16_HA:
13260 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13261 {
13262 tls_gdld_hi:
13263 if ((tls_mask & tls_gd) != 0)
13264 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13265 + R_PPC64_GOT_TPREL16_DS);
13266 else
13267 {
13268 rel->r_offset -= d_offset;
13269 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13270 r_type = R_PPC64_NONE;
13271 }
13272 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13273 }
13274 break;
13275
13276 case R_PPC64_GOT_TLSGD16:
13277 case R_PPC64_GOT_TLSGD16_LO:
13278 tls_gd = TLS_TPRELGD;
13279 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13280 goto tls_ldgd_opt;
13281 break;
13282
13283 case R_PPC64_GOT_TLSLD16:
13284 case R_PPC64_GOT_TLSLD16_LO:
13285 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13286 {
13287 unsigned int insn1, insn2, insn3;
13288 bfd_vma offset;
13289
13290 tls_ldgd_opt:
13291 offset = (bfd_vma) -1;
13292 /* If not using the newer R_PPC64_TLSGD/LD to mark
13293 __tls_get_addr calls, we must trust that the call
13294 stays with its arg setup insns, ie. that the next
13295 reloc is the __tls_get_addr call associated with
13296 the current reloc. Edit both insns. */
13297 if (input_section->has_tls_get_addr_call
13298 && rel + 1 < relend
13299 && branch_reloc_hash_match (input_bfd, rel + 1,
13300 htab->tls_get_addr,
13301 htab->tls_get_addr_fd))
13302 offset = rel[1].r_offset;
13303 if ((tls_mask & tls_gd) != 0)
13304 {
13305 /* IE */
13306 insn1 = bfd_get_32 (output_bfd,
13307 contents + rel->r_offset - d_offset);
13308 insn1 &= (1 << 26) - (1 << 2);
13309 insn1 |= 58 << 26; /* ld */
13310 insn2 = 0x7c636a14; /* add 3,3,13 */
13311 if (offset != (bfd_vma) -1)
13312 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13313 if ((tls_mask & TLS_EXPLICIT) == 0)
13314 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13315 + R_PPC64_GOT_TPREL16_DS);
13316 else
13317 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13318 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13319 }
13320 else
13321 {
13322 /* LE */
13323 insn1 = 0x3c6d0000; /* addis 3,13,0 */
13324 insn2 = 0x38630000; /* addi 3,3,0 */
13325 if (tls_gd == 0)
13326 {
13327 /* Was an LD reloc. */
13328 if (toc_symndx)
13329 sec = local_sections[toc_symndx];
13330 for (r_symndx = 0;
13331 r_symndx < symtab_hdr->sh_info;
13332 r_symndx++)
13333 if (local_sections[r_symndx] == sec)
13334 break;
13335 if (r_symndx >= symtab_hdr->sh_info)
13336 r_symndx = STN_UNDEF;
13337 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13338 if (r_symndx != STN_UNDEF)
13339 rel->r_addend -= (local_syms[r_symndx].st_value
13340 + sec->output_offset
13341 + sec->output_section->vma);
13342 }
13343 else if (toc_symndx != 0)
13344 {
13345 r_symndx = toc_symndx;
13346 rel->r_addend = toc_addend;
13347 }
13348 r_type = R_PPC64_TPREL16_HA;
13349 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13350 if (offset != (bfd_vma) -1)
13351 {
13352 rel[1].r_info = ELF64_R_INFO (r_symndx,
13353 R_PPC64_TPREL16_LO);
13354 rel[1].r_offset = offset + d_offset;
13355 rel[1].r_addend = rel->r_addend;
13356 }
13357 }
13358 bfd_put_32 (output_bfd, insn1,
13359 contents + rel->r_offset - d_offset);
13360 if (offset != (bfd_vma) -1)
13361 {
13362 insn3 = bfd_get_32 (output_bfd,
13363 contents + offset + 4);
13364 if (insn3 == NOP
13365 || insn3 == CROR_151515 || insn3 == CROR_313131)
13366 {
13367 rel[1].r_offset += 4;
13368 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13369 insn2 = NOP;
13370 }
13371 bfd_put_32 (output_bfd, insn2, contents + offset);
13372 }
13373 if ((tls_mask & tls_gd) == 0
13374 && (tls_gd == 0 || toc_symndx != 0))
13375 {
13376 /* We changed the symbol. Start over in order
13377 to get h, sym, sec etc. right. */
13378 rel--;
13379 continue;
13380 }
13381 }
13382 break;
13383
13384 case R_PPC64_TLSGD:
13385 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13386 {
13387 unsigned int insn2, insn3;
13388 bfd_vma offset = rel->r_offset;
13389
13390 if ((tls_mask & TLS_TPRELGD) != 0)
13391 {
13392 /* IE */
13393 r_type = R_PPC64_NONE;
13394 insn2 = 0x7c636a14; /* add 3,3,13 */
13395 }
13396 else
13397 {
13398 /* LE */
13399 if (toc_symndx != 0)
13400 {
13401 r_symndx = toc_symndx;
13402 rel->r_addend = toc_addend;
13403 }
13404 r_type = R_PPC64_TPREL16_LO;
13405 rel->r_offset = offset + d_offset;
13406 insn2 = 0x38630000; /* addi 3,3,0 */
13407 }
13408 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13409 /* Zap the reloc on the _tls_get_addr call too. */
13410 BFD_ASSERT (offset == rel[1].r_offset);
13411 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13412 insn3 = bfd_get_32 (output_bfd,
13413 contents + offset + 4);
13414 if (insn3 == NOP
13415 || insn3 == CROR_151515 || insn3 == CROR_313131)
13416 {
13417 rel->r_offset += 4;
13418 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13419 insn2 = NOP;
13420 }
13421 bfd_put_32 (output_bfd, insn2, contents + offset);
13422 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13423 {
13424 rel--;
13425 continue;
13426 }
13427 }
13428 break;
13429
13430 case R_PPC64_TLSLD:
13431 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13432 {
13433 unsigned int insn2, insn3;
13434 bfd_vma offset = rel->r_offset;
13435
13436 if (toc_symndx)
13437 sec = local_sections[toc_symndx];
13438 for (r_symndx = 0;
13439 r_symndx < symtab_hdr->sh_info;
13440 r_symndx++)
13441 if (local_sections[r_symndx] == sec)
13442 break;
13443 if (r_symndx >= symtab_hdr->sh_info)
13444 r_symndx = STN_UNDEF;
13445 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13446 if (r_symndx != STN_UNDEF)
13447 rel->r_addend -= (local_syms[r_symndx].st_value
13448 + sec->output_offset
13449 + sec->output_section->vma);
13450
13451 r_type = R_PPC64_TPREL16_LO;
13452 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13453 rel->r_offset = offset + d_offset;
13454 /* Zap the reloc on the _tls_get_addr call too. */
13455 BFD_ASSERT (offset == rel[1].r_offset);
13456 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13457 insn2 = 0x38630000; /* addi 3,3,0 */
13458 insn3 = bfd_get_32 (output_bfd,
13459 contents + offset + 4);
13460 if (insn3 == NOP
13461 || insn3 == CROR_151515 || insn3 == CROR_313131)
13462 {
13463 rel->r_offset += 4;
13464 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13465 insn2 = NOP;
13466 }
13467 bfd_put_32 (output_bfd, insn2, contents + offset);
13468 rel--;
13469 continue;
13470 }
13471 break;
13472
13473 case R_PPC64_DTPMOD64:
13474 if (rel + 1 < relend
13475 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13476 && rel[1].r_offset == rel->r_offset + 8)
13477 {
13478 if ((tls_mask & TLS_GD) == 0)
13479 {
13480 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13481 if ((tls_mask & TLS_TPRELGD) != 0)
13482 r_type = R_PPC64_TPREL64;
13483 else
13484 {
13485 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13486 r_type = R_PPC64_NONE;
13487 }
13488 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13489 }
13490 }
13491 else
13492 {
13493 if ((tls_mask & TLS_LD) == 0)
13494 {
13495 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13496 r_type = R_PPC64_NONE;
13497 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13498 }
13499 }
13500 break;
13501
13502 case R_PPC64_TPREL64:
13503 if ((tls_mask & TLS_TPREL) == 0)
13504 {
13505 r_type = R_PPC64_NONE;
13506 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13507 }
13508 break;
13509
13510 case R_PPC64_REL16_HA:
13511 /* If we are generating a non-PIC executable, edit
13512 . 0: addis 2,12,.TOC.-0b@ha
13513 . addi 2,2,.TOC.-0b@l
13514 used by ELFv2 global entry points to set up r2, to
13515 . lis 2,.TOC.@ha
13516 . addi 2,2,.TOC.@l
13517 if .TOC. is in range. */
13518 if (!info->shared
13519 && h != NULL && &h->elf == htab->elf.hgot
13520 && rel + 1 < relend
13521 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13522 && rel[1].r_offset == rel->r_offset + 4
13523 && rel[1].r_addend == rel->r_addend + 4
13524 && relocation + 0x80008000 <= 0xffffffff)
13525 {
13526 unsigned int insn1, insn2;
13527 bfd_vma offset = rel->r_offset - d_offset;
13528 insn1 = bfd_get_32 (output_bfd, contents + offset);
13529 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13530 if ((insn1 & 0xffff0000) == 0x3c4c0000 /* addis 2,12 */
13531 && (insn2 & 0xffff0000) == 0x38420000 /* addi 2,2 */)
13532 {
13533 r_type = R_PPC64_ADDR16_HA;
13534 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13535 rel->r_addend -= d_offset;
13536 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13537 rel[1].r_addend -= d_offset + 4;
13538 bfd_put_32 (output_bfd, 0x3c400000, contents + offset);
13539 }
13540 }
13541 break;
13542 }
13543
13544 /* Handle other relocations that tweak non-addend part of insn. */
13545 insn = 0;
13546 max_br_offset = 1 << 25;
13547 addend = rel->r_addend;
13548 reloc_dest = DEST_NORMAL;
13549 switch (r_type)
13550 {
13551 default:
13552 break;
13553
13554 case R_PPC64_TOCSAVE:
13555 if (relocation + addend == (rel->r_offset
13556 + input_section->output_offset
13557 + input_section->output_section->vma)
13558 && tocsave_find (htab, NO_INSERT,
13559 &local_syms, rel, input_bfd))
13560 {
13561 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13562 if (insn == NOP
13563 || insn == CROR_151515 || insn == CROR_313131)
13564 bfd_put_32 (input_bfd,
13565 STD_R2_0R1 + STK_TOC (htab),
13566 contents + rel->r_offset);
13567 }
13568 break;
13569
13570 /* Branch taken prediction relocations. */
13571 case R_PPC64_ADDR14_BRTAKEN:
13572 case R_PPC64_REL14_BRTAKEN:
13573 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13574 /* Fall thru. */
13575
13576 /* Branch not taken prediction relocations. */
13577 case R_PPC64_ADDR14_BRNTAKEN:
13578 case R_PPC64_REL14_BRNTAKEN:
13579 insn |= bfd_get_32 (output_bfd,
13580 contents + rel->r_offset) & ~(0x01 << 21);
13581 /* Fall thru. */
13582
13583 case R_PPC64_REL14:
13584 max_br_offset = 1 << 15;
13585 /* Fall thru. */
13586
13587 case R_PPC64_REL24:
13588 /* Calls to functions with a different TOC, such as calls to
13589 shared objects, need to alter the TOC pointer. This is
13590 done using a linkage stub. A REL24 branching to these
13591 linkage stubs needs to be followed by a nop, as the nop
13592 will be replaced with an instruction to restore the TOC
13593 base pointer. */
13594 fdh = h;
13595 if (h != NULL
13596 && h->oh != NULL
13597 && h->oh->is_func_descriptor)
13598 fdh = ppc_follow_link (h->oh);
13599 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13600 htab);
13601 if (stub_entry != NULL
13602 && (stub_entry->stub_type == ppc_stub_plt_call
13603 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13604 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13605 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13606 {
13607 bfd_boolean can_plt_call = FALSE;
13608
13609 /* All of these stubs will modify r2, so there must be a
13610 branch and link followed by a nop. The nop is
13611 replaced by an insn to restore r2. */
13612 if (rel->r_offset + 8 <= input_section->size)
13613 {
13614 unsigned long br;
13615
13616 br = bfd_get_32 (input_bfd,
13617 contents + rel->r_offset);
13618 if ((br & 1) != 0)
13619 {
13620 unsigned long nop;
13621
13622 nop = bfd_get_32 (input_bfd,
13623 contents + rel->r_offset + 4);
13624 if (nop == NOP
13625 || nop == CROR_151515 || nop == CROR_313131)
13626 {
13627 if (h != NULL
13628 && (h == htab->tls_get_addr_fd
13629 || h == htab->tls_get_addr)
13630 && !htab->params->no_tls_get_addr_opt)
13631 {
13632 /* Special stub used, leave nop alone. */
13633 }
13634 else
13635 bfd_put_32 (input_bfd,
13636 LD_R2_0R1 + STK_TOC (htab),
13637 contents + rel->r_offset + 4);
13638 can_plt_call = TRUE;
13639 }
13640 }
13641 }
13642
13643 if (!can_plt_call && h != NULL)
13644 {
13645 const char *name = h->elf.root.root.string;
13646
13647 if (*name == '.')
13648 ++name;
13649
13650 if (strncmp (name, "__libc_start_main", 17) == 0
13651 && (name[17] == 0 || name[17] == '@'))
13652 {
13653 /* Allow crt1 branch to go via a toc adjusting
13654 stub. Other calls that never return could do
13655 the same, if we could detect such. */
13656 can_plt_call = TRUE;
13657 }
13658 }
13659
13660 if (!can_plt_call)
13661 {
13662 /* g++ as of 20130507 emits self-calls without a
13663 following nop. This is arguably wrong since we
13664 have conflicting information. On the one hand a
13665 global symbol and on the other a local call
13666 sequence, but don't error for this special case.
13667 It isn't possible to cheaply verify we have
13668 exactly such a call. Allow all calls to the same
13669 section. */
13670 asection *code_sec = sec;
13671
13672 if (get_opd_info (sec) != NULL)
13673 {
13674 bfd_vma off = (relocation + addend
13675 - sec->output_section->vma
13676 - sec->output_offset);
13677
13678 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
13679 }
13680 if (code_sec == input_section)
13681 can_plt_call = TRUE;
13682 }
13683
13684 if (!can_plt_call)
13685 {
13686 info->callbacks->einfo
13687 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13688 "recompile with -fPIC\n"),
13689 input_bfd, input_section, rel->r_offset, sym_name);
13690
13691 bfd_set_error (bfd_error_bad_value);
13692 ret = FALSE;
13693 }
13694
13695 if (can_plt_call
13696 && (stub_entry->stub_type == ppc_stub_plt_call
13697 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13698 unresolved_reloc = FALSE;
13699 }
13700
13701 if ((stub_entry == NULL
13702 || stub_entry->stub_type == ppc_stub_long_branch
13703 || stub_entry->stub_type == ppc_stub_plt_branch)
13704 && get_opd_info (sec) != NULL)
13705 {
13706 /* The branch destination is the value of the opd entry. */
13707 bfd_vma off = (relocation + addend
13708 - sec->output_section->vma
13709 - sec->output_offset);
13710 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13711 if (dest != (bfd_vma) -1)
13712 {
13713 relocation = dest;
13714 addend = 0;
13715 reloc_dest = DEST_OPD;
13716 }
13717 }
13718
13719 /* If the branch is out of reach we ought to have a long
13720 branch stub. */
13721 from = (rel->r_offset
13722 + input_section->output_offset
13723 + input_section->output_section->vma);
13724
13725 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
13726 ? fdh->elf.other
13727 : sym->st_other);
13728
13729 if (stub_entry != NULL
13730 && (stub_entry->stub_type == ppc_stub_long_branch
13731 || stub_entry->stub_type == ppc_stub_plt_branch)
13732 && (r_type == R_PPC64_ADDR14_BRTAKEN
13733 || r_type == R_PPC64_ADDR14_BRNTAKEN
13734 || (relocation + addend - from + max_br_offset
13735 < 2 * max_br_offset)))
13736 /* Don't use the stub if this branch is in range. */
13737 stub_entry = NULL;
13738
13739 if (stub_entry != NULL)
13740 {
13741 /* Munge up the value and addend so that we call the stub
13742 rather than the procedure directly. */
13743 relocation = (stub_entry->stub_offset
13744 + stub_entry->stub_sec->output_offset
13745 + stub_entry->stub_sec->output_section->vma);
13746 addend = 0;
13747 reloc_dest = DEST_STUB;
13748
13749 if ((stub_entry->stub_type == ppc_stub_plt_call
13750 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13751 && (ALWAYS_EMIT_R2SAVE
13752 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13753 && rel + 1 < relend
13754 && rel[1].r_offset == rel->r_offset + 4
13755 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13756 relocation += 4;
13757 }
13758
13759 if (insn != 0)
13760 {
13761 if (is_isa_v2)
13762 {
13763 /* Set 'a' bit. This is 0b00010 in BO field for branch
13764 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13765 for branch on CTR insns (BO == 1a00t or 1a01t). */
13766 if ((insn & (0x14 << 21)) == (0x04 << 21))
13767 insn |= 0x02 << 21;
13768 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13769 insn |= 0x08 << 21;
13770 else
13771 break;
13772 }
13773 else
13774 {
13775 /* Invert 'y' bit if not the default. */
13776 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13777 insn ^= 0x01 << 21;
13778 }
13779
13780 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13781 }
13782
13783 /* NOP out calls to undefined weak functions.
13784 We can thus call a weak function without first
13785 checking whether the function is defined. */
13786 else if (h != NULL
13787 && h->elf.root.type == bfd_link_hash_undefweak
13788 && h->elf.dynindx == -1
13789 && r_type == R_PPC64_REL24
13790 && relocation == 0
13791 && addend == 0)
13792 {
13793 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13794 continue;
13795 }
13796 break;
13797 }
13798
13799 /* Set `addend'. */
13800 tls_type = 0;
13801 switch (r_type)
13802 {
13803 default:
13804 info->callbacks->einfo
13805 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13806 input_bfd, (int) r_type, sym_name);
13807
13808 bfd_set_error (bfd_error_bad_value);
13809 ret = FALSE;
13810 continue;
13811
13812 case R_PPC64_NONE:
13813 case R_PPC64_TLS:
13814 case R_PPC64_TLSGD:
13815 case R_PPC64_TLSLD:
13816 case R_PPC64_TOCSAVE:
13817 case R_PPC64_GNU_VTINHERIT:
13818 case R_PPC64_GNU_VTENTRY:
13819 continue;
13820
13821 /* GOT16 relocations. Like an ADDR16 using the symbol's
13822 address in the GOT as relocation value instead of the
13823 symbol's value itself. Also, create a GOT entry for the
13824 symbol and put the symbol value there. */
13825 case R_PPC64_GOT_TLSGD16:
13826 case R_PPC64_GOT_TLSGD16_LO:
13827 case R_PPC64_GOT_TLSGD16_HI:
13828 case R_PPC64_GOT_TLSGD16_HA:
13829 tls_type = TLS_TLS | TLS_GD;
13830 goto dogot;
13831
13832 case R_PPC64_GOT_TLSLD16:
13833 case R_PPC64_GOT_TLSLD16_LO:
13834 case R_PPC64_GOT_TLSLD16_HI:
13835 case R_PPC64_GOT_TLSLD16_HA:
13836 tls_type = TLS_TLS | TLS_LD;
13837 goto dogot;
13838
13839 case R_PPC64_GOT_TPREL16_DS:
13840 case R_PPC64_GOT_TPREL16_LO_DS:
13841 case R_PPC64_GOT_TPREL16_HI:
13842 case R_PPC64_GOT_TPREL16_HA:
13843 tls_type = TLS_TLS | TLS_TPREL;
13844 goto dogot;
13845
13846 case R_PPC64_GOT_DTPREL16_DS:
13847 case R_PPC64_GOT_DTPREL16_LO_DS:
13848 case R_PPC64_GOT_DTPREL16_HI:
13849 case R_PPC64_GOT_DTPREL16_HA:
13850 tls_type = TLS_TLS | TLS_DTPREL;
13851 goto dogot;
13852
13853 case R_PPC64_GOT16:
13854 case R_PPC64_GOT16_LO:
13855 case R_PPC64_GOT16_HI:
13856 case R_PPC64_GOT16_HA:
13857 case R_PPC64_GOT16_DS:
13858 case R_PPC64_GOT16_LO_DS:
13859 dogot:
13860 {
13861 /* Relocation is to the entry for this symbol in the global
13862 offset table. */
13863 asection *got;
13864 bfd_vma *offp;
13865 bfd_vma off;
13866 unsigned long indx = 0;
13867 struct got_entry *ent;
13868
13869 if (tls_type == (TLS_TLS | TLS_LD)
13870 && (h == NULL
13871 || !h->elf.def_dynamic))
13872 ent = ppc64_tlsld_got (input_bfd);
13873 else
13874 {
13875
13876 if (h != NULL)
13877 {
13878 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13879 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13880 &h->elf)
13881 || (info->shared
13882 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
13883 /* This is actually a static link, or it is a
13884 -Bsymbolic link and the symbol is defined
13885 locally, or the symbol was forced to be local
13886 because of a version file. */
13887 ;
13888 else
13889 {
13890 BFD_ASSERT (h->elf.dynindx != -1);
13891 indx = h->elf.dynindx;
13892 unresolved_reloc = FALSE;
13893 }
13894 ent = h->elf.got.glist;
13895 }
13896 else
13897 {
13898 if (local_got_ents == NULL)
13899 abort ();
13900 ent = local_got_ents[r_symndx];
13901 }
13902
13903 for (; ent != NULL; ent = ent->next)
13904 if (ent->addend == orig_rel.r_addend
13905 && ent->owner == input_bfd
13906 && ent->tls_type == tls_type)
13907 break;
13908 }
13909
13910 if (ent == NULL)
13911 abort ();
13912 if (ent->is_indirect)
13913 ent = ent->got.ent;
13914 offp = &ent->got.offset;
13915 got = ppc64_elf_tdata (ent->owner)->got;
13916 if (got == NULL)
13917 abort ();
13918
13919 /* The offset must always be a multiple of 8. We use the
13920 least significant bit to record whether we have already
13921 processed this entry. */
13922 off = *offp;
13923 if ((off & 1) != 0)
13924 off &= ~1;
13925 else
13926 {
13927 /* Generate relocs for the dynamic linker, except in
13928 the case of TLSLD where we'll use one entry per
13929 module. */
13930 asection *relgot;
13931 bfd_boolean ifunc;
13932
13933 *offp = off | 1;
13934 relgot = NULL;
13935 ifunc = (h != NULL
13936 ? h->elf.type == STT_GNU_IFUNC
13937 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13938 if (ifunc)
13939 relgot = htab->elf.irelplt;
13940 else if ((info->shared || indx != 0)
13941 && (h == NULL
13942 || (tls_type == (TLS_TLS | TLS_LD)
13943 && !h->elf.def_dynamic)
13944 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13945 || h->elf.root.type != bfd_link_hash_undefweak))
13946 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13947 if (relgot != NULL)
13948 {
13949 outrel.r_offset = (got->output_section->vma
13950 + got->output_offset
13951 + off);
13952 outrel.r_addend = addend;
13953 if (tls_type & (TLS_LD | TLS_GD))
13954 {
13955 outrel.r_addend = 0;
13956 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13957 if (tls_type == (TLS_TLS | TLS_GD))
13958 {
13959 loc = relgot->contents;
13960 loc += (relgot->reloc_count++
13961 * sizeof (Elf64_External_Rela));
13962 bfd_elf64_swap_reloca_out (output_bfd,
13963 &outrel, loc);
13964 outrel.r_offset += 8;
13965 outrel.r_addend = addend;
13966 outrel.r_info
13967 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13968 }
13969 }
13970 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13971 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13972 else if (tls_type == (TLS_TLS | TLS_TPREL))
13973 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13974 else if (indx != 0)
13975 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13976 else
13977 {
13978 if (ifunc)
13979 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13980 else
13981 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13982
13983 /* Write the .got section contents for the sake
13984 of prelink. */
13985 loc = got->contents + off;
13986 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13987 loc);
13988 }
13989
13990 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13991 {
13992 outrel.r_addend += relocation;
13993 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13994 outrel.r_addend -= htab->elf.tls_sec->vma;
13995 }
13996 loc = relgot->contents;
13997 loc += (relgot->reloc_count++
13998 * sizeof (Elf64_External_Rela));
13999 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14000 }
14001
14002 /* Init the .got section contents here if we're not
14003 emitting a reloc. */
14004 else
14005 {
14006 relocation += addend;
14007 if (tls_type == (TLS_TLS | TLS_LD))
14008 relocation = 1;
14009 else if (tls_type != 0)
14010 {
14011 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14012 if (tls_type == (TLS_TLS | TLS_TPREL))
14013 relocation += DTP_OFFSET - TP_OFFSET;
14014
14015 if (tls_type == (TLS_TLS | TLS_GD))
14016 {
14017 bfd_put_64 (output_bfd, relocation,
14018 got->contents + off + 8);
14019 relocation = 1;
14020 }
14021 }
14022
14023 bfd_put_64 (output_bfd, relocation,
14024 got->contents + off);
14025 }
14026 }
14027
14028 if (off >= (bfd_vma) -2)
14029 abort ();
14030
14031 relocation = got->output_section->vma + got->output_offset + off;
14032 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
14033 }
14034 break;
14035
14036 case R_PPC64_PLT16_HA:
14037 case R_PPC64_PLT16_HI:
14038 case R_PPC64_PLT16_LO:
14039 case R_PPC64_PLT32:
14040 case R_PPC64_PLT64:
14041 /* Relocation is to the entry for this symbol in the
14042 procedure linkage table. */
14043
14044 /* Resolve a PLT reloc against a local symbol directly,
14045 without using the procedure linkage table. */
14046 if (h == NULL)
14047 break;
14048
14049 /* It's possible that we didn't make a PLT entry for this
14050 symbol. This happens when statically linking PIC code,
14051 or when using -Bsymbolic. Go find a match if there is a
14052 PLT entry. */
14053 if (htab->elf.splt != NULL)
14054 {
14055 struct plt_entry *ent;
14056 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
14057 if (ent->plt.offset != (bfd_vma) -1
14058 && ent->addend == orig_rel.r_addend)
14059 {
14060 relocation = (htab->elf.splt->output_section->vma
14061 + htab->elf.splt->output_offset
14062 + ent->plt.offset);
14063 unresolved_reloc = FALSE;
14064 break;
14065 }
14066 }
14067 break;
14068
14069 case R_PPC64_TOC:
14070 /* Relocation value is TOC base. */
14071 relocation = TOCstart;
14072 if (r_symndx == STN_UNDEF)
14073 relocation += htab->stub_group[input_section->id].toc_off;
14074 else if (unresolved_reloc)
14075 ;
14076 else if (sec != NULL && sec->id <= htab->top_id)
14077 relocation += htab->stub_group[sec->id].toc_off;
14078 else
14079 unresolved_reloc = TRUE;
14080 goto dodyn;
14081
14082 /* TOC16 relocs. We want the offset relative to the TOC base,
14083 which is the address of the start of the TOC plus 0x8000.
14084 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14085 in this order. */
14086 case R_PPC64_TOC16:
14087 case R_PPC64_TOC16_LO:
14088 case R_PPC64_TOC16_HI:
14089 case R_PPC64_TOC16_DS:
14090 case R_PPC64_TOC16_LO_DS:
14091 case R_PPC64_TOC16_HA:
14092 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
14093 break;
14094
14095 /* Relocate against the beginning of the section. */
14096 case R_PPC64_SECTOFF:
14097 case R_PPC64_SECTOFF_LO:
14098 case R_PPC64_SECTOFF_HI:
14099 case R_PPC64_SECTOFF_DS:
14100 case R_PPC64_SECTOFF_LO_DS:
14101 case R_PPC64_SECTOFF_HA:
14102 if (sec != NULL)
14103 addend -= sec->output_section->vma;
14104 break;
14105
14106 case R_PPC64_REL16:
14107 case R_PPC64_REL16_LO:
14108 case R_PPC64_REL16_HI:
14109 case R_PPC64_REL16_HA:
14110 break;
14111
14112 case R_PPC64_REL14:
14113 case R_PPC64_REL14_BRNTAKEN:
14114 case R_PPC64_REL14_BRTAKEN:
14115 case R_PPC64_REL24:
14116 break;
14117
14118 case R_PPC64_TPREL16:
14119 case R_PPC64_TPREL16_LO:
14120 case R_PPC64_TPREL16_HI:
14121 case R_PPC64_TPREL16_HA:
14122 case R_PPC64_TPREL16_DS:
14123 case R_PPC64_TPREL16_LO_DS:
14124 case R_PPC64_TPREL16_HIGH:
14125 case R_PPC64_TPREL16_HIGHA:
14126 case R_PPC64_TPREL16_HIGHER:
14127 case R_PPC64_TPREL16_HIGHERA:
14128 case R_PPC64_TPREL16_HIGHEST:
14129 case R_PPC64_TPREL16_HIGHESTA:
14130 if (h != NULL
14131 && h->elf.root.type == bfd_link_hash_undefweak
14132 && h->elf.dynindx == -1)
14133 {
14134 /* Make this relocation against an undefined weak symbol
14135 resolve to zero. This is really just a tweak, since
14136 code using weak externs ought to check that they are
14137 defined before using them. */
14138 bfd_byte *p = contents + rel->r_offset - d_offset;
14139
14140 insn = bfd_get_32 (output_bfd, p);
14141 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14142 if (insn != 0)
14143 bfd_put_32 (output_bfd, insn, p);
14144 break;
14145 }
14146 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14147 if (info->shared)
14148 /* The TPREL16 relocs shouldn't really be used in shared
14149 libs as they will result in DT_TEXTREL being set, but
14150 support them anyway. */
14151 goto dodyn;
14152 break;
14153
14154 case R_PPC64_DTPREL16:
14155 case R_PPC64_DTPREL16_LO:
14156 case R_PPC64_DTPREL16_HI:
14157 case R_PPC64_DTPREL16_HA:
14158 case R_PPC64_DTPREL16_DS:
14159 case R_PPC64_DTPREL16_LO_DS:
14160 case R_PPC64_DTPREL16_HIGH:
14161 case R_PPC64_DTPREL16_HIGHA:
14162 case R_PPC64_DTPREL16_HIGHER:
14163 case R_PPC64_DTPREL16_HIGHERA:
14164 case R_PPC64_DTPREL16_HIGHEST:
14165 case R_PPC64_DTPREL16_HIGHESTA:
14166 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14167 break;
14168
14169 case R_PPC64_ADDR64_LOCAL:
14170 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14171 ? h->elf.other
14172 : sym->st_other);
14173 break;
14174
14175 case R_PPC64_DTPMOD64:
14176 relocation = 1;
14177 addend = 0;
14178 goto dodyn;
14179
14180 case R_PPC64_TPREL64:
14181 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14182 goto dodyn;
14183
14184 case R_PPC64_DTPREL64:
14185 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14186 /* Fall thru */
14187
14188 /* Relocations that may need to be propagated if this is a
14189 dynamic object. */
14190 case R_PPC64_REL30:
14191 case R_PPC64_REL32:
14192 case R_PPC64_REL64:
14193 case R_PPC64_ADDR14:
14194 case R_PPC64_ADDR14_BRNTAKEN:
14195 case R_PPC64_ADDR14_BRTAKEN:
14196 case R_PPC64_ADDR16:
14197 case R_PPC64_ADDR16_DS:
14198 case R_PPC64_ADDR16_HA:
14199 case R_PPC64_ADDR16_HI:
14200 case R_PPC64_ADDR16_HIGH:
14201 case R_PPC64_ADDR16_HIGHA:
14202 case R_PPC64_ADDR16_HIGHER:
14203 case R_PPC64_ADDR16_HIGHERA:
14204 case R_PPC64_ADDR16_HIGHEST:
14205 case R_PPC64_ADDR16_HIGHESTA:
14206 case R_PPC64_ADDR16_LO:
14207 case R_PPC64_ADDR16_LO_DS:
14208 case R_PPC64_ADDR24:
14209 case R_PPC64_ADDR32:
14210 case R_PPC64_ADDR64:
14211 case R_PPC64_UADDR16:
14212 case R_PPC64_UADDR32:
14213 case R_PPC64_UADDR64:
14214 dodyn:
14215 if ((input_section->flags & SEC_ALLOC) == 0)
14216 break;
14217
14218 if (NO_OPD_RELOCS && is_opd)
14219 break;
14220
14221 if ((info->shared
14222 && (h == NULL
14223 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14224 || h->elf.root.type != bfd_link_hash_undefweak)
14225 && (must_be_dyn_reloc (info, r_type)
14226 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14227 || (ELIMINATE_COPY_RELOCS
14228 && !info->shared
14229 && h != NULL
14230 && h->elf.dynindx != -1
14231 && !h->elf.non_got_ref
14232 && !h->elf.def_regular)
14233 || (!info->shared
14234 && (h != NULL
14235 ? h->elf.type == STT_GNU_IFUNC
14236 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14237 {
14238 bfd_boolean skip, relocate;
14239 asection *sreloc;
14240 bfd_vma out_off;
14241
14242 /* When generating a dynamic object, these relocations
14243 are copied into the output file to be resolved at run
14244 time. */
14245
14246 skip = FALSE;
14247 relocate = FALSE;
14248
14249 out_off = _bfd_elf_section_offset (output_bfd, info,
14250 input_section, rel->r_offset);
14251 if (out_off == (bfd_vma) -1)
14252 skip = TRUE;
14253 else if (out_off == (bfd_vma) -2)
14254 skip = TRUE, relocate = TRUE;
14255 out_off += (input_section->output_section->vma
14256 + input_section->output_offset);
14257 outrel.r_offset = out_off;
14258 outrel.r_addend = rel->r_addend;
14259
14260 /* Optimize unaligned reloc use. */
14261 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14262 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14263 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14264 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14265 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14266 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14267 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14268 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14269 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14270
14271 if (skip)
14272 memset (&outrel, 0, sizeof outrel);
14273 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14274 && !is_opd
14275 && r_type != R_PPC64_TOC)
14276 {
14277 BFD_ASSERT (h->elf.dynindx != -1);
14278 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14279 }
14280 else
14281 {
14282 /* This symbol is local, or marked to become local,
14283 or this is an opd section reloc which must point
14284 at a local function. */
14285 outrel.r_addend += relocation;
14286 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14287 {
14288 if (is_opd && h != NULL)
14289 {
14290 /* Lie about opd entries. This case occurs
14291 when building shared libraries and we
14292 reference a function in another shared
14293 lib. The same thing happens for a weak
14294 definition in an application that's
14295 overridden by a strong definition in a
14296 shared lib. (I believe this is a generic
14297 bug in binutils handling of weak syms.)
14298 In these cases we won't use the opd
14299 entry in this lib. */
14300 unresolved_reloc = FALSE;
14301 }
14302 if (!is_opd
14303 && r_type == R_PPC64_ADDR64
14304 && (h != NULL
14305 ? h->elf.type == STT_GNU_IFUNC
14306 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14307 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14308 else
14309 {
14310 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14311
14312 /* We need to relocate .opd contents for ld.so.
14313 Prelink also wants simple and consistent rules
14314 for relocs. This make all RELATIVE relocs have
14315 *r_offset equal to r_addend. */
14316 relocate = TRUE;
14317 }
14318 }
14319 else
14320 {
14321 long indx = 0;
14322
14323 if (h != NULL
14324 ? h->elf.type == STT_GNU_IFUNC
14325 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14326 {
14327 info->callbacks->einfo
14328 (_("%P: %H: %s for indirect "
14329 "function `%T' unsupported\n"),
14330 input_bfd, input_section, rel->r_offset,
14331 ppc64_elf_howto_table[r_type]->name,
14332 sym_name);
14333 ret = FALSE;
14334 }
14335 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14336 ;
14337 else if (sec == NULL || sec->owner == NULL)
14338 {
14339 bfd_set_error (bfd_error_bad_value);
14340 return FALSE;
14341 }
14342 else
14343 {
14344 asection *osec;
14345
14346 osec = sec->output_section;
14347 indx = elf_section_data (osec)->dynindx;
14348
14349 if (indx == 0)
14350 {
14351 if ((osec->flags & SEC_READONLY) == 0
14352 && htab->elf.data_index_section != NULL)
14353 osec = htab->elf.data_index_section;
14354 else
14355 osec = htab->elf.text_index_section;
14356 indx = elf_section_data (osec)->dynindx;
14357 }
14358 BFD_ASSERT (indx != 0);
14359
14360 /* We are turning this relocation into one
14361 against a section symbol, so subtract out
14362 the output section's address but not the
14363 offset of the input section in the output
14364 section. */
14365 outrel.r_addend -= osec->vma;
14366 }
14367
14368 outrel.r_info = ELF64_R_INFO (indx, r_type);
14369 }
14370 }
14371
14372 sreloc = elf_section_data (input_section)->sreloc;
14373 if (h != NULL
14374 ? h->elf.type == STT_GNU_IFUNC
14375 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14376 sreloc = htab->elf.irelplt;
14377 if (sreloc == NULL)
14378 abort ();
14379
14380 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14381 >= sreloc->size)
14382 abort ();
14383 loc = sreloc->contents;
14384 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14385 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14386
14387 /* If this reloc is against an external symbol, it will
14388 be computed at runtime, so there's no need to do
14389 anything now. However, for the sake of prelink ensure
14390 that the section contents are a known value. */
14391 if (! relocate)
14392 {
14393 unresolved_reloc = FALSE;
14394 /* The value chosen here is quite arbitrary as ld.so
14395 ignores section contents except for the special
14396 case of .opd where the contents might be accessed
14397 before relocation. Choose zero, as that won't
14398 cause reloc overflow. */
14399 relocation = 0;
14400 addend = 0;
14401 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14402 to improve backward compatibility with older
14403 versions of ld. */
14404 if (r_type == R_PPC64_ADDR64)
14405 addend = outrel.r_addend;
14406 /* Adjust pc_relative relocs to have zero in *r_offset. */
14407 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14408 addend = (input_section->output_section->vma
14409 + input_section->output_offset
14410 + rel->r_offset);
14411 }
14412 }
14413 break;
14414
14415 case R_PPC64_COPY:
14416 case R_PPC64_GLOB_DAT:
14417 case R_PPC64_JMP_SLOT:
14418 case R_PPC64_JMP_IREL:
14419 case R_PPC64_RELATIVE:
14420 /* We shouldn't ever see these dynamic relocs in relocatable
14421 files. */
14422 /* Fall through. */
14423
14424 case R_PPC64_PLTGOT16:
14425 case R_PPC64_PLTGOT16_DS:
14426 case R_PPC64_PLTGOT16_HA:
14427 case R_PPC64_PLTGOT16_HI:
14428 case R_PPC64_PLTGOT16_LO:
14429 case R_PPC64_PLTGOT16_LO_DS:
14430 case R_PPC64_PLTREL32:
14431 case R_PPC64_PLTREL64:
14432 /* These ones haven't been implemented yet. */
14433
14434 info->callbacks->einfo
14435 (_("%P: %B: %s is not supported for `%T'\n"),
14436 input_bfd,
14437 ppc64_elf_howto_table[r_type]->name, sym_name);
14438
14439 bfd_set_error (bfd_error_invalid_operation);
14440 ret = FALSE;
14441 continue;
14442 }
14443
14444 /* Multi-instruction sequences that access the TOC can be
14445 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14446 to nop; addi rb,r2,x; */
14447 switch (r_type)
14448 {
14449 default:
14450 break;
14451
14452 case R_PPC64_GOT_TLSLD16_HI:
14453 case R_PPC64_GOT_TLSGD16_HI:
14454 case R_PPC64_GOT_TPREL16_HI:
14455 case R_PPC64_GOT_DTPREL16_HI:
14456 case R_PPC64_GOT16_HI:
14457 case R_PPC64_TOC16_HI:
14458 /* These relocs would only be useful if building up an
14459 offset to later add to r2, perhaps in an indexed
14460 addressing mode instruction. Don't try to optimize.
14461 Unfortunately, the possibility of someone building up an
14462 offset like this or even with the HA relocs, means that
14463 we need to check the high insn when optimizing the low
14464 insn. */
14465 break;
14466
14467 case R_PPC64_GOT_TLSLD16_HA:
14468 case R_PPC64_GOT_TLSGD16_HA:
14469 case R_PPC64_GOT_TPREL16_HA:
14470 case R_PPC64_GOT_DTPREL16_HA:
14471 case R_PPC64_GOT16_HA:
14472 case R_PPC64_TOC16_HA:
14473 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14474 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14475 {
14476 bfd_byte *p = contents + (rel->r_offset & ~3);
14477 bfd_put_32 (input_bfd, NOP, p);
14478 }
14479 break;
14480
14481 case R_PPC64_GOT_TLSLD16_LO:
14482 case R_PPC64_GOT_TLSGD16_LO:
14483 case R_PPC64_GOT_TPREL16_LO_DS:
14484 case R_PPC64_GOT_DTPREL16_LO_DS:
14485 case R_PPC64_GOT16_LO:
14486 case R_PPC64_GOT16_LO_DS:
14487 case R_PPC64_TOC16_LO:
14488 case R_PPC64_TOC16_LO_DS:
14489 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14490 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14491 {
14492 bfd_byte *p = contents + (rel->r_offset & ~3);
14493 insn = bfd_get_32 (input_bfd, p);
14494 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14495 {
14496 /* Transform addic to addi when we change reg. */
14497 insn &= ~((0x3f << 26) | (0x1f << 16));
14498 insn |= (14u << 26) | (2 << 16);
14499 }
14500 else
14501 {
14502 insn &= ~(0x1f << 16);
14503 insn |= 2 << 16;
14504 }
14505 bfd_put_32 (input_bfd, insn, p);
14506 }
14507 break;
14508 }
14509
14510 /* Do any further special processing. */
14511 howto = ppc64_elf_howto_table[(int) r_type];
14512 switch (r_type)
14513 {
14514 default:
14515 break;
14516
14517 case R_PPC64_REL16_HA:
14518 case R_PPC64_ADDR16_HA:
14519 case R_PPC64_ADDR16_HIGHA:
14520 case R_PPC64_ADDR16_HIGHERA:
14521 case R_PPC64_ADDR16_HIGHESTA:
14522 case R_PPC64_TOC16_HA:
14523 case R_PPC64_SECTOFF_HA:
14524 case R_PPC64_TPREL16_HA:
14525 case R_PPC64_TPREL16_HIGHA:
14526 case R_PPC64_TPREL16_HIGHERA:
14527 case R_PPC64_TPREL16_HIGHESTA:
14528 case R_PPC64_DTPREL16_HA:
14529 case R_PPC64_DTPREL16_HIGHA:
14530 case R_PPC64_DTPREL16_HIGHERA:
14531 case R_PPC64_DTPREL16_HIGHESTA:
14532 /* It's just possible that this symbol is a weak symbol
14533 that's not actually defined anywhere. In that case,
14534 'sec' would be NULL, and we should leave the symbol
14535 alone (it will be set to zero elsewhere in the link). */
14536 if (sec == NULL)
14537 break;
14538 /* Fall thru */
14539
14540 case R_PPC64_GOT16_HA:
14541 case R_PPC64_PLTGOT16_HA:
14542 case R_PPC64_PLT16_HA:
14543 case R_PPC64_GOT_TLSGD16_HA:
14544 case R_PPC64_GOT_TLSLD16_HA:
14545 case R_PPC64_GOT_TPREL16_HA:
14546 case R_PPC64_GOT_DTPREL16_HA:
14547 /* Add 0x10000 if sign bit in 0:15 is set.
14548 Bits 0:15 are not used. */
14549 addend += 0x8000;
14550 break;
14551
14552 case R_PPC64_ADDR16_DS:
14553 case R_PPC64_ADDR16_LO_DS:
14554 case R_PPC64_GOT16_DS:
14555 case R_PPC64_GOT16_LO_DS:
14556 case R_PPC64_PLT16_LO_DS:
14557 case R_PPC64_SECTOFF_DS:
14558 case R_PPC64_SECTOFF_LO_DS:
14559 case R_PPC64_TOC16_DS:
14560 case R_PPC64_TOC16_LO_DS:
14561 case R_PPC64_PLTGOT16_DS:
14562 case R_PPC64_PLTGOT16_LO_DS:
14563 case R_PPC64_GOT_TPREL16_DS:
14564 case R_PPC64_GOT_TPREL16_LO_DS:
14565 case R_PPC64_GOT_DTPREL16_DS:
14566 case R_PPC64_GOT_DTPREL16_LO_DS:
14567 case R_PPC64_TPREL16_DS:
14568 case R_PPC64_TPREL16_LO_DS:
14569 case R_PPC64_DTPREL16_DS:
14570 case R_PPC64_DTPREL16_LO_DS:
14571 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14572 mask = 3;
14573 /* If this reloc is against an lq insn, then the value must be
14574 a multiple of 16. This is somewhat of a hack, but the
14575 "correct" way to do this by defining _DQ forms of all the
14576 _DS relocs bloats all reloc switches in this file. It
14577 doesn't seem to make much sense to use any of these relocs
14578 in data, so testing the insn should be safe. */
14579 if ((insn & (0x3f << 26)) == (56u << 26))
14580 mask = 15;
14581 if (((relocation + addend) & mask) != 0)
14582 {
14583 info->callbacks->einfo
14584 (_("%P: %H: error: %s not a multiple of %u\n"),
14585 input_bfd, input_section, rel->r_offset,
14586 howto->name,
14587 mask + 1);
14588 bfd_set_error (bfd_error_bad_value);
14589 ret = FALSE;
14590 continue;
14591 }
14592 break;
14593 }
14594
14595 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
14596 because such sections are not SEC_ALLOC and thus ld.so will
14597 not process them. */
14598 if (unresolved_reloc
14599 && !((input_section->flags & SEC_DEBUGGING) != 0
14600 && h->elf.def_dynamic)
14601 && _bfd_elf_section_offset (output_bfd, info, input_section,
14602 rel->r_offset) != (bfd_vma) -1)
14603 {
14604 info->callbacks->einfo
14605 (_("%P: %H: unresolvable %s against `%T'\n"),
14606 input_bfd, input_section, rel->r_offset,
14607 howto->name,
14608 h->elf.root.root.string);
14609 ret = FALSE;
14610 }
14611
14612 /* 16-bit fields in insns mostly have signed values, but a
14613 few insns have 16-bit unsigned values. Really, we should
14614 have different reloc types. */
14615 if (howto->complain_on_overflow != complain_overflow_dont
14616 && howto->dst_mask == 0xffff
14617 && (input_section->flags & SEC_CODE) != 0)
14618 {
14619 enum complain_overflow complain = complain_overflow_signed;
14620
14621 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14622 if (howto->rightshift == 0
14623 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
14624 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
14625 || (insn & (0x3f << 26)) == 26u << 26 /* xori */
14626 || (insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
14627 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
14628 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
14629 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
14630 complain = complain_overflow_unsigned;
14631 if (howto->complain_on_overflow != complain)
14632 {
14633 alt_howto = *howto;
14634 alt_howto.complain_on_overflow = complain;
14635 howto = &alt_howto;
14636 }
14637 }
14638
14639 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
14640 rel->r_offset, relocation, addend);
14641
14642 if (r != bfd_reloc_ok)
14643 {
14644 char *more_info = NULL;
14645 const char *reloc_name = howto->name;
14646
14647 if (reloc_dest != DEST_NORMAL)
14648 {
14649 more_info = bfd_malloc (strlen (reloc_name) + 8);
14650 if (more_info != NULL)
14651 {
14652 strcpy (more_info, reloc_name);
14653 strcat (more_info, (reloc_dest == DEST_OPD
14654 ? " (OPD)" : " (stub)"));
14655 reloc_name = more_info;
14656 }
14657 }
14658
14659 if (r == bfd_reloc_overflow)
14660 {
14661 if (warned)
14662 continue;
14663 if (h != NULL
14664 && h->elf.root.type == bfd_link_hash_undefweak
14665 && howto->pc_relative)
14666 {
14667 /* Assume this is a call protected by other code that
14668 detects the symbol is undefined. If this is the case,
14669 we can safely ignore the overflow. If not, the
14670 program is hosed anyway, and a little warning isn't
14671 going to help. */
14672
14673 continue;
14674 }
14675
14676 if (!((*info->callbacks->reloc_overflow)
14677 (info, &h->elf.root, sym_name,
14678 reloc_name, orig_rel.r_addend,
14679 input_bfd, input_section, rel->r_offset)))
14680 return FALSE;
14681 }
14682 else
14683 {
14684 info->callbacks->einfo
14685 (_("%P: %H: %s against `%T': error %d\n"),
14686 input_bfd, input_section, rel->r_offset,
14687 reloc_name, sym_name, (int) r);
14688 ret = FALSE;
14689 }
14690 if (more_info != NULL)
14691 free (more_info);
14692 }
14693 }
14694
14695 /* If we're emitting relocations, then shortly after this function
14696 returns, reloc offsets and addends for this section will be
14697 adjusted. Worse, reloc symbol indices will be for the output
14698 file rather than the input. Save a copy of the relocs for
14699 opd_entry_value. */
14700 if (is_opd && (info->emitrelocations || info->relocatable))
14701 {
14702 bfd_size_type amt;
14703 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14704 rel = bfd_alloc (input_bfd, amt);
14705 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
14706 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
14707 if (rel == NULL)
14708 return FALSE;
14709 memcpy (rel, relocs, amt);
14710 }
14711 return ret;
14712 }
14713
14714 /* Adjust the value of any local symbols in opd sections. */
14715
14716 static int
14717 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14718 const char *name ATTRIBUTE_UNUSED,
14719 Elf_Internal_Sym *elfsym,
14720 asection *input_sec,
14721 struct elf_link_hash_entry *h)
14722 {
14723 struct _opd_sec_data *opd;
14724 long adjust;
14725 bfd_vma value;
14726
14727 if (h != NULL)
14728 return 1;
14729
14730 opd = get_opd_info (input_sec);
14731 if (opd == NULL || opd->adjust == NULL)
14732 return 1;
14733
14734 value = elfsym->st_value - input_sec->output_offset;
14735 if (!info->relocatable)
14736 value -= input_sec->output_section->vma;
14737
14738 adjust = opd->adjust[value / 8];
14739 if (adjust == -1)
14740 return 2;
14741
14742 elfsym->st_value += adjust;
14743 return 1;
14744 }
14745
14746 /* Finish up dynamic symbol handling. We set the contents of various
14747 dynamic sections here. */
14748
14749 static bfd_boolean
14750 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14751 struct bfd_link_info *info,
14752 struct elf_link_hash_entry *h,
14753 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14754 {
14755 struct ppc_link_hash_table *htab;
14756 struct plt_entry *ent;
14757 Elf_Internal_Rela rela;
14758 bfd_byte *loc;
14759
14760 htab = ppc_hash_table (info);
14761 if (htab == NULL)
14762 return FALSE;
14763
14764 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14765 if (ent->plt.offset != (bfd_vma) -1)
14766 {
14767 /* This symbol has an entry in the procedure linkage
14768 table. Set it up. */
14769 if (!htab->elf.dynamic_sections_created
14770 || h->dynindx == -1)
14771 {
14772 BFD_ASSERT (h->type == STT_GNU_IFUNC
14773 && h->def_regular
14774 && (h->root.type == bfd_link_hash_defined
14775 || h->root.type == bfd_link_hash_defweak));
14776 rela.r_offset = (htab->elf.iplt->output_section->vma
14777 + htab->elf.iplt->output_offset
14778 + ent->plt.offset);
14779 if (htab->opd_abi)
14780 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14781 else
14782 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14783 rela.r_addend = (h->root.u.def.value
14784 + h->root.u.def.section->output_offset
14785 + h->root.u.def.section->output_section->vma
14786 + ent->addend);
14787 loc = (htab->elf.irelplt->contents
14788 + (htab->elf.irelplt->reloc_count++
14789 * sizeof (Elf64_External_Rela)));
14790 }
14791 else
14792 {
14793 rela.r_offset = (htab->elf.splt->output_section->vma
14794 + htab->elf.splt->output_offset
14795 + ent->plt.offset);
14796 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14797 rela.r_addend = ent->addend;
14798 loc = (htab->elf.srelplt->contents
14799 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
14800 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
14801 }
14802 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14803
14804 if (!htab->opd_abi)
14805 {
14806 if (!h->def_regular)
14807 {
14808 /* Mark the symbol as undefined, rather than as
14809 defined in glink. Leave the value if there were
14810 any relocations where pointer equality matters
14811 (this is a clue for the dynamic linker, to make
14812 function pointer comparisons work between an
14813 application and shared library), otherwise set it
14814 to zero. */
14815 sym->st_shndx = SHN_UNDEF;
14816 if (!h->pointer_equality_needed)
14817 sym->st_value = 0;
14818 else if (!h->ref_regular_nonweak)
14819 {
14820 /* This breaks function pointer comparisons, but
14821 that is better than breaking tests for a NULL
14822 function pointer. */
14823 sym->st_value = 0;
14824 }
14825 }
14826 }
14827 }
14828
14829 if (h->needs_copy)
14830 {
14831 /* This symbol needs a copy reloc. Set it up. */
14832
14833 if (h->dynindx == -1
14834 || (h->root.type != bfd_link_hash_defined
14835 && h->root.type != bfd_link_hash_defweak)
14836 || htab->relbss == NULL)
14837 abort ();
14838
14839 rela.r_offset = (h->root.u.def.value
14840 + h->root.u.def.section->output_section->vma
14841 + h->root.u.def.section->output_offset);
14842 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14843 rela.r_addend = 0;
14844 loc = htab->relbss->contents;
14845 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14846 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14847 }
14848
14849 return TRUE;
14850 }
14851
14852 /* Used to decide how to sort relocs in an optimal manner for the
14853 dynamic linker, before writing them out. */
14854
14855 static enum elf_reloc_type_class
14856 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14857 const asection *rel_sec,
14858 const Elf_Internal_Rela *rela)
14859 {
14860 enum elf_ppc64_reloc_type r_type;
14861 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14862
14863 if (rel_sec == htab->elf.irelplt)
14864 return reloc_class_ifunc;
14865
14866 r_type = ELF64_R_TYPE (rela->r_info);
14867 switch (r_type)
14868 {
14869 case R_PPC64_RELATIVE:
14870 return reloc_class_relative;
14871 case R_PPC64_JMP_SLOT:
14872 return reloc_class_plt;
14873 case R_PPC64_COPY:
14874 return reloc_class_copy;
14875 default:
14876 return reloc_class_normal;
14877 }
14878 }
14879
14880 /* Finish up the dynamic sections. */
14881
14882 static bfd_boolean
14883 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14884 struct bfd_link_info *info)
14885 {
14886 struct ppc_link_hash_table *htab;
14887 bfd *dynobj;
14888 asection *sdyn;
14889
14890 htab = ppc_hash_table (info);
14891 if (htab == NULL)
14892 return FALSE;
14893
14894 dynobj = htab->elf.dynobj;
14895 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14896
14897 if (htab->elf.dynamic_sections_created)
14898 {
14899 Elf64_External_Dyn *dyncon, *dynconend;
14900
14901 if (sdyn == NULL || htab->elf.sgot == NULL)
14902 abort ();
14903
14904 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14905 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14906 for (; dyncon < dynconend; dyncon++)
14907 {
14908 Elf_Internal_Dyn dyn;
14909 asection *s;
14910
14911 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14912
14913 switch (dyn.d_tag)
14914 {
14915 default:
14916 continue;
14917
14918 case DT_PPC64_GLINK:
14919 s = htab->glink;
14920 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14921 /* We stupidly defined DT_PPC64_GLINK to be the start
14922 of glink rather than the first entry point, which is
14923 what ld.so needs, and now have a bigger stub to
14924 support automatic multiple TOCs. */
14925 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
14926 break;
14927
14928 case DT_PPC64_OPD:
14929 s = bfd_get_section_by_name (output_bfd, ".opd");
14930 if (s == NULL)
14931 continue;
14932 dyn.d_un.d_ptr = s->vma;
14933 break;
14934
14935 case DT_PPC64_OPT:
14936 if (htab->do_multi_toc && htab->multi_toc_needed)
14937 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
14938 break;
14939
14940 case DT_PPC64_OPDSZ:
14941 s = bfd_get_section_by_name (output_bfd, ".opd");
14942 if (s == NULL)
14943 continue;
14944 dyn.d_un.d_val = s->size;
14945 break;
14946
14947 case DT_PLTGOT:
14948 s = htab->elf.splt;
14949 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14950 break;
14951
14952 case DT_JMPREL:
14953 s = htab->elf.srelplt;
14954 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14955 break;
14956
14957 case DT_PLTRELSZ:
14958 dyn.d_un.d_val = htab->elf.srelplt->size;
14959 break;
14960
14961 case DT_RELASZ:
14962 /* Don't count procedure linkage table relocs in the
14963 overall reloc count. */
14964 s = htab->elf.srelplt;
14965 if (s == NULL)
14966 continue;
14967 dyn.d_un.d_val -= s->size;
14968 break;
14969
14970 case DT_RELA:
14971 /* We may not be using the standard ELF linker script.
14972 If .rela.plt is the first .rela section, we adjust
14973 DT_RELA to not include it. */
14974 s = htab->elf.srelplt;
14975 if (s == NULL)
14976 continue;
14977 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14978 continue;
14979 dyn.d_un.d_ptr += s->size;
14980 break;
14981 }
14982
14983 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14984 }
14985 }
14986
14987 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
14988 {
14989 /* Fill in the first entry in the global offset table.
14990 We use it to hold the link-time TOCbase. */
14991 bfd_put_64 (output_bfd,
14992 elf_gp (output_bfd) + TOC_BASE_OFF,
14993 htab->elf.sgot->contents);
14994
14995 /* Set .got entry size. */
14996 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
14997 }
14998
14999 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15000 {
15001 /* Set .plt entry size. */
15002 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15003 = PLT_ENTRY_SIZE (htab);
15004 }
15005
15006 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15007 brlt ourselves if emitrelocations. */
15008 if (htab->brlt != NULL
15009 && htab->brlt->reloc_count != 0
15010 && !_bfd_elf_link_output_relocs (output_bfd,
15011 htab->brlt,
15012 elf_section_data (htab->brlt)->rela.hdr,
15013 elf_section_data (htab->brlt)->relocs,
15014 NULL))
15015 return FALSE;
15016
15017 if (htab->glink != NULL
15018 && htab->glink->reloc_count != 0
15019 && !_bfd_elf_link_output_relocs (output_bfd,
15020 htab->glink,
15021 elf_section_data (htab->glink)->rela.hdr,
15022 elf_section_data (htab->glink)->relocs,
15023 NULL))
15024 return FALSE;
15025
15026
15027 if (htab->glink_eh_frame != NULL
15028 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15029 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15030 htab->glink_eh_frame,
15031 htab->glink_eh_frame->contents))
15032 return FALSE;
15033
15034 /* We need to handle writing out multiple GOT sections ourselves,
15035 since we didn't add them to DYNOBJ. We know dynobj is the first
15036 bfd. */
15037 while ((dynobj = dynobj->link_next) != NULL)
15038 {
15039 asection *s;
15040
15041 if (!is_ppc64_elf (dynobj))
15042 continue;
15043
15044 s = ppc64_elf_tdata (dynobj)->got;
15045 if (s != NULL
15046 && s->size != 0
15047 && s->output_section != bfd_abs_section_ptr
15048 && !bfd_set_section_contents (output_bfd, s->output_section,
15049 s->contents, s->output_offset,
15050 s->size))
15051 return FALSE;
15052 s = ppc64_elf_tdata (dynobj)->relgot;
15053 if (s != NULL
15054 && s->size != 0
15055 && s->output_section != bfd_abs_section_ptr
15056 && !bfd_set_section_contents (output_bfd, s->output_section,
15057 s->contents, s->output_offset,
15058 s->size))
15059 return FALSE;
15060 }
15061
15062 return TRUE;
15063 }
15064
15065 #include "elf64-target.h"
15066
15067 /* FreeBSD support */
15068
15069 #undef TARGET_LITTLE_SYM
15070 #undef TARGET_LITTLE_NAME
15071
15072 #undef TARGET_BIG_SYM
15073 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
15074 #undef TARGET_BIG_NAME
15075 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15076
15077 #undef ELF_OSABI
15078 #define ELF_OSABI ELFOSABI_FREEBSD
15079
15080 #undef elf64_bed
15081 #define elf64_bed elf64_powerpc_fbsd_bed
15082
15083 #include "elf64-target.h"
15084
GDB Binutils - Deliverables
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