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LD/ELF: Unify STB_GNU_UNIQUE handling
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2016 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90 #define elf_backend_object_p ppc64_elf_object_p
91 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93 #define elf_backend_write_core_note ppc64_elf_write_core_note
94 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97 #define elf_backend_check_directives ppc64_elf_before_check_relocs
98 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
99 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100 #define elf_backend_check_relocs ppc64_elf_check_relocs
101 #define elf_backend_gc_keep ppc64_elf_gc_keep
102 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
107 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
130
131 /* Offsets to some stack save slots. */
132 #define STK_LR 16
133 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
134 /* This one is dodgy. ELFv2 does not have a linker word, so use the
135 CR save slot. Used only by optimised __tls_get_addr call stub,
136 relying on __tls_get_addr_opt not saving CR.. */
137 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
138
139 /* TOC base pointers offset from start of TOC. */
140 #define TOC_BASE_OFF 0x8000
141 /* TOC base alignment. */
142 #define TOC_BASE_ALIGN 256
143
144 /* Offset of tp and dtp pointers from start of TLS block. */
145 #define TP_OFFSET 0x7000
146 #define DTP_OFFSET 0x8000
147
148 /* .plt call stub instructions. The normal stub is like this, but
149 sometimes the .plt entry crosses a 64k boundary and we need to
150 insert an addi to adjust r11. */
151 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
152 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
153 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
154 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
155 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
156 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
157 #define BCTR 0x4e800420 /* bctr */
158
159 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
160 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
161 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
162
163 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
164 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
165 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
166 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
167 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
168 #define BNECTR 0x4ca20420 /* bnectr+ */
169 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
170
171 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
172 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
173 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
174
175 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
176 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
177 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
178
179 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
180 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
181 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
182 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
183 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
184
185 /* glink call stub instructions. We enter with the index in R0. */
186 #define GLINK_CALL_STUB_SIZE (16*4)
187 /* 0: */
188 /* .quad plt0-1f */
189 /* __glink: */
190 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
191 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
192 /* 1: */
193 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
194 /* ld %2,(0b-1b)(%11) */
195 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
196 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
197 /* ld %12,0(%11) */
198 /* ld %2,8(%11) */
199 /* mtctr %12 */
200 /* ld %11,16(%11) */
201 /* bctr */
202 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
203 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
204 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
205 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
206 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
207
208 /* Pad with this. */
209 #define NOP 0x60000000
210
211 /* Some other nops. */
212 #define CROR_151515 0x4def7b82
213 #define CROR_313131 0x4ffffb82
214
215 /* .glink entries for the first 32k functions are two instructions. */
216 #define LI_R0_0 0x38000000 /* li %r0,0 */
217 #define B_DOT 0x48000000 /* b . */
218
219 /* After that, we need two instructions to load the index, followed by
220 a branch. */
221 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
222 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
223
224 /* Instructions used by the save and restore reg functions. */
225 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
226 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
227 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
228 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
229 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
230 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
231 #define LI_R12_0 0x39800000 /* li %r12,0 */
232 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
233 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
234 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
235 #define BLR 0x4e800020 /* blr */
236
237 /* Since .opd is an array of descriptors and each entry will end up
238 with identical R_PPC64_RELATIVE relocs, there is really no need to
239 propagate .opd relocs; The dynamic linker should be taught to
240 relocate .opd without reloc entries. */
241 #ifndef NO_OPD_RELOCS
242 #define NO_OPD_RELOCS 0
243 #endif
244
245 #ifndef ARRAY_SIZE
246 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
247 #endif
248
249 static inline int
250 abiversion (bfd *abfd)
251 {
252 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
253 }
254
255 static inline void
256 set_abiversion (bfd *abfd, int ver)
257 {
258 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
259 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
260 }
261 \f
262 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
263
264 /* Relocation HOWTO's. */
265 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
266
267 static reloc_howto_type ppc64_elf_howto_raw[] = {
268 /* This reloc does nothing. */
269 HOWTO (R_PPC64_NONE, /* type */
270 0, /* rightshift */
271 3, /* size (0 = byte, 1 = short, 2 = long) */
272 0, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC64_NONE", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* A standard 32 bit relocation. */
284 HOWTO (R_PPC64_ADDR32, /* type */
285 0, /* rightshift */
286 2, /* size (0 = byte, 1 = short, 2 = long) */
287 32, /* bitsize */
288 FALSE, /* pc_relative */
289 0, /* bitpos */
290 complain_overflow_bitfield, /* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_PPC64_ADDR32", /* name */
293 FALSE, /* partial_inplace */
294 0, /* src_mask */
295 0xffffffff, /* dst_mask */
296 FALSE), /* pcrel_offset */
297
298 /* An absolute 26 bit branch; the lower two bits must be zero.
299 FIXME: we don't check that, we just clear them. */
300 HOWTO (R_PPC64_ADDR24, /* type */
301 0, /* rightshift */
302 2, /* size (0 = byte, 1 = short, 2 = long) */
303 26, /* bitsize */
304 FALSE, /* pc_relative */
305 0, /* bitpos */
306 complain_overflow_bitfield, /* complain_on_overflow */
307 bfd_elf_generic_reloc, /* special_function */
308 "R_PPC64_ADDR24", /* name */
309 FALSE, /* partial_inplace */
310 0, /* src_mask */
311 0x03fffffc, /* dst_mask */
312 FALSE), /* pcrel_offset */
313
314 /* A standard 16 bit relocation. */
315 HOWTO (R_PPC64_ADDR16, /* type */
316 0, /* rightshift */
317 1, /* size (0 = byte, 1 = short, 2 = long) */
318 16, /* bitsize */
319 FALSE, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_bitfield, /* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_PPC64_ADDR16", /* name */
324 FALSE, /* partial_inplace */
325 0, /* src_mask */
326 0xffff, /* dst_mask */
327 FALSE), /* pcrel_offset */
328
329 /* A 16 bit relocation without overflow. */
330 HOWTO (R_PPC64_ADDR16_LO, /* type */
331 0, /* rightshift */
332 1, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_dont,/* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC64_ADDR16_LO", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xffff, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* Bits 16-31 of an address. */
345 HOWTO (R_PPC64_ADDR16_HI, /* type */
346 16, /* rightshift */
347 1, /* size (0 = byte, 1 = short, 2 = long) */
348 16, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC64_ADDR16_HI", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0xffff, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
360 bits, treated as a signed number, is negative. */
361 HOWTO (R_PPC64_ADDR16_HA, /* type */
362 16, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 ppc64_elf_ha_reloc, /* special_function */
369 "R_PPC64_ADDR16_HA", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* An absolute 16 bit branch; the lower two bits must be zero.
376 FIXME: we don't check that, we just clear them. */
377 HOWTO (R_PPC64_ADDR14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_ADDR14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 /* An absolute 16 bit branch, for which bit 10 should be set to
392 indicate that the branch is expected to be taken. The lower two
393 bits must be zero. */
394 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_ADDR14_BRTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 /* An absolute 16 bit branch, for which bit 10 should be set to
409 indicate that the branch is not expected to be taken. The lower
410 two bits must be zero. */
411 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 FALSE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_ADDR14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 FALSE), /* pcrel_offset */
424
425 /* A relative 26 bit branch; the lower two bits must be zero. */
426 HOWTO (R_PPC64_REL24, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 26, /* bitsize */
430 TRUE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_branch_reloc, /* special_function */
434 "R_PPC64_REL24", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0x03fffffc, /* dst_mask */
438 TRUE), /* pcrel_offset */
439
440 /* A relative 16 bit branch; the lower two bits must be zero. */
441 HOWTO (R_PPC64_REL14, /* type */
442 0, /* rightshift */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 TRUE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_branch_reloc, /* special_function */
449 "R_PPC64_REL14", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0x0000fffc, /* dst_mask */
453 TRUE), /* pcrel_offset */
454
455 /* A relative 16 bit branch. Bit 10 should be set to indicate that
456 the branch is expected to be taken. The lower two bits must be
457 zero. */
458 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
459 0, /* rightshift */
460 2, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 TRUE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_signed, /* complain_on_overflow */
465 ppc64_elf_brtaken_reloc, /* special_function */
466 "R_PPC64_REL14_BRTAKEN", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0x0000fffc, /* dst_mask */
470 TRUE), /* pcrel_offset */
471
472 /* A relative 16 bit branch. Bit 10 should be set to indicate that
473 the branch is not expected to be taken. The lower two bits must
474 be zero. */
475 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
476 0, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 TRUE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_signed, /* complain_on_overflow */
482 ppc64_elf_brtaken_reloc, /* special_function */
483 "R_PPC64_REL14_BRNTAKEN",/* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0x0000fffc, /* dst_mask */
487 TRUE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
490 symbol. */
491 HOWTO (R_PPC64_GOT16, /* type */
492 0, /* rightshift */
493 1, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_signed, /* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GOT16", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xffff, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
506 the symbol. */
507 HOWTO (R_PPC64_GOT16_LO, /* type */
508 0, /* rightshift */
509 1, /* size (0 = byte, 1 = short, 2 = long) */
510 16, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_GOT16_LO", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0xffff, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
522 the symbol. */
523 HOWTO (R_PPC64_GOT16_HI, /* type */
524 16, /* rightshift */
525 1, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_signed,/* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GOT16_HI", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0xffff, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
538 the symbol. */
539 HOWTO (R_PPC64_GOT16_HA, /* type */
540 16, /* rightshift */
541 1, /* size (0 = byte, 1 = short, 2 = long) */
542 16, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_signed,/* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_GOT16_HA", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* This is used only by the dynamic linker. The symbol should exist
554 both in the object being run and in some shared library. The
555 dynamic linker copies the data addressed by the symbol from the
556 shared library into the object, because the object being
557 run has to have the data at some particular address. */
558 HOWTO (R_PPC64_COPY, /* type */
559 0, /* rightshift */
560 0, /* this one is variable size */
561 0, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 ppc64_elf_unhandled_reloc, /* special_function */
566 "R_PPC64_COPY", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR64, but used when setting global offset table
573 entries. */
574 HOWTO (R_PPC64_GLOB_DAT, /* type */
575 0, /* rightshift */
576 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
577 64, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_dont, /* complain_on_overflow */
581 ppc64_elf_unhandled_reloc, /* special_function */
582 "R_PPC64_GLOB_DAT", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 ONES (64), /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* Created by the link editor. Marks a procedure linkage table
589 entry for a symbol. */
590 HOWTO (R_PPC64_JMP_SLOT, /* type */
591 0, /* rightshift */
592 0, /* size (0 = byte, 1 = short, 2 = long) */
593 0, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_dont, /* complain_on_overflow */
597 ppc64_elf_unhandled_reloc, /* special_function */
598 "R_PPC64_JMP_SLOT", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* Used only by the dynamic linker. When the object is run, this
605 doubleword64 is set to the load address of the object, plus the
606 addend. */
607 HOWTO (R_PPC64_RELATIVE, /* type */
608 0, /* rightshift */
609 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
610 64, /* bitsize */
611 FALSE, /* pc_relative */
612 0, /* bitpos */
613 complain_overflow_dont, /* complain_on_overflow */
614 bfd_elf_generic_reloc, /* special_function */
615 "R_PPC64_RELATIVE", /* name */
616 FALSE, /* partial_inplace */
617 0, /* src_mask */
618 ONES (64), /* dst_mask */
619 FALSE), /* pcrel_offset */
620
621 /* Like R_PPC64_ADDR32, but may be unaligned. */
622 HOWTO (R_PPC64_UADDR32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC64_UADDR32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffffffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16, but may be unaligned. */
637 HOWTO (R_PPC64_UADDR16, /* type */
638 0, /* rightshift */
639 1, /* size (0 = byte, 1 = short, 2 = long) */
640 16, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_bitfield, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_UADDR16", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffff, /* dst_mask */
649 FALSE), /* pcrel_offset */
650
651 /* 32-bit PC relative. */
652 HOWTO (R_PPC64_REL32, /* type */
653 0, /* rightshift */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
655 32, /* bitsize */
656 TRUE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_signed, /* complain_on_overflow */
659 bfd_elf_generic_reloc, /* special_function */
660 "R_PPC64_REL32", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffffffff, /* dst_mask */
664 TRUE), /* pcrel_offset */
665
666 /* 32-bit relocation to the symbol's procedure linkage table. */
667 HOWTO (R_PPC64_PLT32, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 32, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT32", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffffffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
682 FIXME: R_PPC64_PLTREL32 not supported. */
683 HOWTO (R_PPC64_PLTREL32, /* type */
684 0, /* rightshift */
685 2, /* size (0 = byte, 1 = short, 2 = long) */
686 32, /* bitsize */
687 TRUE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_signed, /* complain_on_overflow */
690 bfd_elf_generic_reloc, /* special_function */
691 "R_PPC64_PLTREL32", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffffffff, /* dst_mask */
695 TRUE), /* pcrel_offset */
696
697 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
698 the symbol. */
699 HOWTO (R_PPC64_PLT16_LO, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_unhandled_reloc, /* special_function */
707 "R_PPC64_PLT16_LO", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
714 the symbol. */
715 HOWTO (R_PPC64_PLT16_HI, /* type */
716 16, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_signed, /* complain_on_overflow */
722 ppc64_elf_unhandled_reloc, /* special_function */
723 "R_PPC64_PLT16_HI", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
730 the symbol. */
731 HOWTO (R_PPC64_PLT16_HA, /* type */
732 16, /* rightshift */
733 1, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 FALSE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_signed, /* complain_on_overflow */
738 ppc64_elf_unhandled_reloc, /* special_function */
739 "R_PPC64_PLT16_HA", /* name */
740 FALSE, /* partial_inplace */
741 0, /* src_mask */
742 0xffff, /* dst_mask */
743 FALSE), /* pcrel_offset */
744
745 /* 16-bit section relative relocation. */
746 HOWTO (R_PPC64_SECTOFF, /* type */
747 0, /* rightshift */
748 1, /* size (0 = byte, 1 = short, 2 = long) */
749 16, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_signed, /* complain_on_overflow */
753 ppc64_elf_sectoff_reloc, /* special_function */
754 "R_PPC64_SECTOFF", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 0xffff, /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* Like R_PPC64_SECTOFF, but no overflow warning. */
761 HOWTO (R_PPC64_SECTOFF_LO, /* type */
762 0, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 ppc64_elf_sectoff_reloc, /* special_function */
769 "R_PPC64_SECTOFF_LO", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* 16-bit upper half section relative relocation. */
776 HOWTO (R_PPC64_SECTOFF_HI, /* type */
777 16, /* rightshift */
778 1, /* size (0 = byte, 1 = short, 2 = long) */
779 16, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_signed, /* complain_on_overflow */
783 ppc64_elf_sectoff_reloc, /* special_function */
784 "R_PPC64_SECTOFF_HI", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0xffff, /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* 16-bit upper half adjusted section relative relocation. */
791 HOWTO (R_PPC64_SECTOFF_HA, /* type */
792 16, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_signed, /* complain_on_overflow */
798 ppc64_elf_sectoff_ha_reloc, /* special_function */
799 "R_PPC64_SECTOFF_HA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* Like R_PPC64_REL24 without touching the two least significant bits. */
806 HOWTO (R_PPC64_REL30, /* type */
807 2, /* rightshift */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
809 30, /* bitsize */
810 TRUE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_REL30", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xfffffffc, /* dst_mask */
818 TRUE), /* pcrel_offset */
819
820 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
821
822 /* A standard 64-bit relocation. */
823 HOWTO (R_PPC64_ADDR64, /* type */
824 0, /* rightshift */
825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
826 64, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR64", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 ONES (64), /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 32-47 of an address. */
838 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
839 32, /* rightshift */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
841 16, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_ADDR16_HIGHER", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* The bits 32-47 of an address, plus 1 if the contents of the low
853 16 bits, treated as a signed number, is negative. */
854 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
855 32, /* rightshift */
856 1, /* size (0 = byte, 1 = short, 2 = long) */
857 16, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 ppc64_elf_ha_reloc, /* special_function */
862 "R_PPC64_ADDR16_HIGHERA", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 0xffff, /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* The bits 48-63 of an address. */
869 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
870 48, /* rightshift */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
872 16, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_ADDR16_HIGHEST", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* The bits 48-63 of an address, plus 1 if the contents of the low
884 16 bits, treated as a signed number, is negative. */
885 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
886 48, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_dont, /* complain_on_overflow */
892 ppc64_elf_ha_reloc, /* special_function */
893 "R_PPC64_ADDR16_HIGHESTA", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* Like ADDR64, but may be unaligned. */
900 HOWTO (R_PPC64_UADDR64, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_PPC64_UADDR64", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 64-bit relative relocation. */
915 HOWTO (R_PPC64_REL64, /* type */
916 0, /* rightshift */
917 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
918 64, /* bitsize */
919 TRUE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_dont, /* complain_on_overflow */
922 bfd_elf_generic_reloc, /* special_function */
923 "R_PPC64_REL64", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 ONES (64), /* dst_mask */
927 TRUE), /* pcrel_offset */
928
929 /* 64-bit relocation to the symbol's procedure linkage table. */
930 HOWTO (R_PPC64_PLT64, /* type */
931 0, /* rightshift */
932 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
933 64, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 ppc64_elf_unhandled_reloc, /* special_function */
938 "R_PPC64_PLT64", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 ONES (64), /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 64-bit PC relative relocation to the symbol's procedure linkage
945 table. */
946 /* FIXME: R_PPC64_PLTREL64 not supported. */
947 HOWTO (R_PPC64_PLTREL64, /* type */
948 0, /* rightshift */
949 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
950 64, /* bitsize */
951 TRUE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc64_elf_unhandled_reloc, /* special_function */
955 "R_PPC64_PLTREL64", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 ONES (64), /* dst_mask */
959 TRUE), /* pcrel_offset */
960
961 /* 16 bit TOC-relative relocation. */
962
963 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
964 HOWTO (R_PPC64_TOC16, /* type */
965 0, /* rightshift */
966 1, /* size (0 = byte, 1 = short, 2 = long) */
967 16, /* bitsize */
968 FALSE, /* pc_relative */
969 0, /* bitpos */
970 complain_overflow_signed, /* complain_on_overflow */
971 ppc64_elf_toc_reloc, /* special_function */
972 "R_PPC64_TOC16", /* name */
973 FALSE, /* partial_inplace */
974 0, /* src_mask */
975 0xffff, /* dst_mask */
976 FALSE), /* pcrel_offset */
977
978 /* 16 bit TOC-relative relocation without overflow. */
979
980 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
981 HOWTO (R_PPC64_TOC16_LO, /* type */
982 0, /* rightshift */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
984 16, /* bitsize */
985 FALSE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 ppc64_elf_toc_reloc, /* special_function */
989 "R_PPC64_TOC16_LO", /* name */
990 FALSE, /* partial_inplace */
991 0, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE), /* pcrel_offset */
994
995 /* 16 bit TOC-relative relocation, high 16 bits. */
996
997 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
998 HOWTO (R_PPC64_TOC16_HI, /* type */
999 16, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_signed, /* complain_on_overflow */
1005 ppc64_elf_toc_reloc, /* special_function */
1006 "R_PPC64_TOC16_HI", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1013 contents of the low 16 bits, treated as a signed number, is
1014 negative. */
1015
1016 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1017 HOWTO (R_PPC64_TOC16_HA, /* type */
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_signed, /* complain_on_overflow */
1024 ppc64_elf_toc_ha_reloc, /* special_function */
1025 "R_PPC64_TOC16_HA", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1032
1033 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1034 HOWTO (R_PPC64_TOC, /* type */
1035 0, /* rightshift */
1036 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1037 64, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_dont, /* complain_on_overflow */
1041 ppc64_elf_toc64_reloc, /* special_function */
1042 "R_PPC64_TOC", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 ONES (64), /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_GOT16, but also informs the link editor that the
1049 value to relocate may (!) refer to a PLT entry which the link
1050 editor (a) may replace with the symbol value. If the link editor
1051 is unable to fully resolve the symbol, it may (b) create a PLT
1052 entry and store the address to the new PLT entry in the GOT.
1053 This permits lazy resolution of function symbols at run time.
1054 The link editor may also skip all of this and just (c) emit a
1055 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1056 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16, /* type */
1058 0, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_signed, /* complain_on_overflow */
1064 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_PLTGOT16, but without overflow. */
1072 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1073 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc64_elf_unhandled_reloc, /* special_function */
1081 "R_PPC64_PLTGOT16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1088 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1089 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_PLTGOT16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1104 1 if the contents of the low 16 bits, treated as a signed number,
1105 is negative. */
1106 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1107 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1108 16, /* rightshift */
1109 1, /* size (0 = byte, 1 = short, 2 = long) */
1110 16, /* bitsize */
1111 FALSE, /* pc_relative */
1112 0, /* bitpos */
1113 complain_overflow_signed, /* complain_on_overflow */
1114 ppc64_elf_unhandled_reloc, /* special_function */
1115 "R_PPC64_PLTGOT16_HA", /* name */
1116 FALSE, /* partial_inplace */
1117 0, /* src_mask */
1118 0xffff, /* dst_mask */
1119 FALSE), /* pcrel_offset */
1120
1121 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1122 HOWTO (R_PPC64_ADDR16_DS, /* type */
1123 0, /* rightshift */
1124 1, /* size (0 = byte, 1 = short, 2 = long) */
1125 16, /* bitsize */
1126 FALSE, /* pc_relative */
1127 0, /* bitpos */
1128 complain_overflow_signed, /* complain_on_overflow */
1129 bfd_elf_generic_reloc, /* special_function */
1130 "R_PPC64_ADDR16_DS", /* name */
1131 FALSE, /* partial_inplace */
1132 0, /* src_mask */
1133 0xfffc, /* dst_mask */
1134 FALSE), /* pcrel_offset */
1135
1136 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1137 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1138 0, /* rightshift */
1139 1, /* size (0 = byte, 1 = short, 2 = long) */
1140 16, /* bitsize */
1141 FALSE, /* pc_relative */
1142 0, /* bitpos */
1143 complain_overflow_dont,/* complain_on_overflow */
1144 bfd_elf_generic_reloc, /* special_function */
1145 "R_PPC64_ADDR16_LO_DS",/* name */
1146 FALSE, /* partial_inplace */
1147 0, /* src_mask */
1148 0xfffc, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1150
1151 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1152 HOWTO (R_PPC64_GOT16_DS, /* type */
1153 0, /* rightshift */
1154 1, /* size (0 = byte, 1 = short, 2 = long) */
1155 16, /* bitsize */
1156 FALSE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_signed, /* complain_on_overflow */
1159 ppc64_elf_unhandled_reloc, /* special_function */
1160 "R_PPC64_GOT16_DS", /* name */
1161 FALSE, /* partial_inplace */
1162 0, /* src_mask */
1163 0xfffc, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1165
1166 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1167 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1168 0, /* rightshift */
1169 1, /* size (0 = byte, 1 = short, 2 = long) */
1170 16, /* bitsize */
1171 FALSE, /* pc_relative */
1172 0, /* bitpos */
1173 complain_overflow_dont, /* complain_on_overflow */
1174 ppc64_elf_unhandled_reloc, /* special_function */
1175 "R_PPC64_GOT16_LO_DS", /* name */
1176 FALSE, /* partial_inplace */
1177 0, /* src_mask */
1178 0xfffc, /* dst_mask */
1179 FALSE), /* pcrel_offset */
1180
1181 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1182 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1183 0, /* rightshift */
1184 1, /* size (0 = byte, 1 = short, 2 = long) */
1185 16, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_dont, /* complain_on_overflow */
1189 ppc64_elf_unhandled_reloc, /* special_function */
1190 "R_PPC64_PLT16_LO_DS", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xfffc, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1197 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_signed, /* complain_on_overflow */
1204 ppc64_elf_sectoff_reloc, /* special_function */
1205 "R_PPC64_SECTOFF_DS", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1212 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 ppc64_elf_sectoff_reloc, /* special_function */
1220 "R_PPC64_SECTOFF_LO_DS",/* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1227 HOWTO (R_PPC64_TOC16_DS, /* type */
1228 0, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_signed, /* complain_on_overflow */
1234 ppc64_elf_toc_reloc, /* special_function */
1235 "R_PPC64_TOC16_DS", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xfffc, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1242 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1243 0, /* rightshift */
1244 1, /* size (0 = byte, 1 = short, 2 = long) */
1245 16, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_toc_reloc, /* special_function */
1250 "R_PPC64_TOC16_LO_DS", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0xfffc, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1257 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1258 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1259 0, /* rightshift */
1260 1, /* size (0 = byte, 1 = short, 2 = long) */
1261 16, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_signed, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_PLTGOT16_DS", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 0xfffc, /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1273 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1274 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_dont, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_PLTGOT16_LO_DS",/* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xfffc, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Marker relocs for TLS. */
1289 HOWTO (R_PPC64_TLS,
1290 0, /* rightshift */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1292 32, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 "R_PPC64_TLS", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 HOWTO (R_PPC64_TLSGD,
1304 0, /* rightshift */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1306 32, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 bfd_elf_generic_reloc, /* special_function */
1311 "R_PPC64_TLSGD", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 HOWTO (R_PPC64_TLSLD,
1318 0, /* rightshift */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1320 32, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_PPC64_TLSLD", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 HOWTO (R_PPC64_TOCSAVE,
1332 0, /* rightshift */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1334 32, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC64_TOCSAVE", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Computes the load module index of the load module that contains the
1346 definition of its TLS sym. */
1347 HOWTO (R_PPC64_DTPMOD64,
1348 0, /* rightshift */
1349 4, /* size (0 = byte, 1 = short, 2 = long) */
1350 64, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPMOD64", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 ONES (64), /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Computes a dtv-relative displacement, the difference between the value
1362 of sym+add and the base address of the thread-local storage block that
1363 contains the definition of sym, minus 0x8000. */
1364 HOWTO (R_PPC64_DTPREL64,
1365 0, /* rightshift */
1366 4, /* size (0 = byte, 1 = short, 2 = long) */
1367 64, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL64", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 ONES (64), /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* A 16 bit dtprel reloc. */
1379 HOWTO (R_PPC64_DTPREL16,
1380 0, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_signed, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but no overflow. */
1394 HOWTO (R_PPC64_DTPREL16_LO,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_dont, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_LO", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1409 HOWTO (R_PPC64_DTPREL16_HI,
1410 16, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_signed, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_HI", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1424 HOWTO (R_PPC64_DTPREL16_HA,
1425 16, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_signed, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_DTPREL16_HA", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1439 HOWTO (R_PPC64_DTPREL16_HIGHER,
1440 32, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_DTPREL16_HIGHER", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1454 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1455 32, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_DTPREL16_HIGHERA", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1469 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1470 48, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_DTPREL16_HIGHEST", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1484 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1485 48, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like DTPREL16, but for insns with a DS field. */
1499 HOWTO (R_PPC64_DTPREL16_DS,
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_DTPREL16_DS", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xfffc, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like DTPREL16_DS, but no overflow. */
1514 HOWTO (R_PPC64_DTPREL16_LO_DS,
1515 0, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_DTPREL16_LO_DS", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xfffc, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Computes a tp-relative displacement, the difference between the value of
1529 sym+add and the value of the thread pointer (r13). */
1530 HOWTO (R_PPC64_TPREL64,
1531 0, /* rightshift */
1532 4, /* size (0 = byte, 1 = short, 2 = long) */
1533 64, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL64", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 ONES (64), /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* A 16 bit tprel reloc. */
1545 HOWTO (R_PPC64_TPREL16,
1546 0, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_signed, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but no overflow. */
1560 HOWTO (R_PPC64_TPREL16_LO,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_LO", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_LO, but next higher group of 16 bits. */
1575 HOWTO (R_PPC64_TPREL16_HI,
1576 16, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_signed, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_HI", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like TPREL16_HI, but adjust for low 16 bits. */
1590 HOWTO (R_PPC64_TPREL16_HA,
1591 16, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_signed, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_TPREL16_HA", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like TPREL16_HI, but next higher group of 16 bits. */
1605 HOWTO (R_PPC64_TPREL16_HIGHER,
1606 32, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_dont, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_TPREL16_HIGHER", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1620 HOWTO (R_PPC64_TPREL16_HIGHERA,
1621 32, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_TPREL16_HIGHERA", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_TPREL16_HIGHEST,
1636 48, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_TPREL16_HIGHEST", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1651 48, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_TPREL16_HIGHESTA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like TPREL16, but for insns with a DS field. */
1665 HOWTO (R_PPC64_TPREL16_DS,
1666 0, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_signed, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_TPREL16_DS", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xfffc, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like TPREL16_DS, but no overflow. */
1680 HOWTO (R_PPC64_TPREL16_LO_DS,
1681 0, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_TPREL16_LO_DS", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xfffc, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1695 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1696 to the first entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_TLSGD16,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSGD16", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSGD16, but no overflow. */
1712 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSGD16_LO", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_signed, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_TLSGD16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_signed, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_TLSGD16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1757 with values (sym+add)@dtpmod and zero, and computes the offset to the
1758 first entry relative to the TOC base (r2). */
1759 HOWTO (R_PPC64_GOT_TLSLD16,
1760 0, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_signed, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_TLSLD16", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xffff, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Like GOT_TLSLD16, but no overflow. */
1774 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_dont, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_TLSLD16_LO", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xffff, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1789 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1790 16, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TLSLD16_HI", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xffff, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1804 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_signed, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TLSLD16_HA", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1819 the offset to the entry relative to the TOC base (r2). */
1820 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1821 0, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_signed, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_DTPREL16_DS", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xfffc, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* Like GOT_DTPREL16_DS, but no overflow. */
1835 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1836 0, /* rightshift */
1837 1, /* size (0 = byte, 1 = short, 2 = long) */
1838 16, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 ppc64_elf_unhandled_reloc, /* special_function */
1843 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0xfffc, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1850 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1851 16, /* rightshift */
1852 1, /* size (0 = byte, 1 = short, 2 = long) */
1853 16, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_signed, /* complain_on_overflow */
1857 ppc64_elf_unhandled_reloc, /* special_function */
1858 "R_PPC64_GOT_DTPREL16_HI", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0xffff, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863
1864 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1865 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1866 16, /* rightshift */
1867 1, /* size (0 = byte, 1 = short, 2 = long) */
1868 16, /* bitsize */
1869 FALSE, /* pc_relative */
1870 0, /* bitpos */
1871 complain_overflow_signed, /* complain_on_overflow */
1872 ppc64_elf_unhandled_reloc, /* special_function */
1873 "R_PPC64_GOT_DTPREL16_HA", /* name */
1874 FALSE, /* partial_inplace */
1875 0, /* src_mask */
1876 0xffff, /* dst_mask */
1877 FALSE), /* pcrel_offset */
1878
1879 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1880 offset to the entry relative to the TOC base (r2). */
1881 HOWTO (R_PPC64_GOT_TPREL16_DS,
1882 0, /* rightshift */
1883 1, /* size (0 = byte, 1 = short, 2 = long) */
1884 16, /* bitsize */
1885 FALSE, /* pc_relative */
1886 0, /* bitpos */
1887 complain_overflow_signed, /* complain_on_overflow */
1888 ppc64_elf_unhandled_reloc, /* special_function */
1889 "R_PPC64_GOT_TPREL16_DS", /* name */
1890 FALSE, /* partial_inplace */
1891 0, /* src_mask */
1892 0xfffc, /* dst_mask */
1893 FALSE), /* pcrel_offset */
1894
1895 /* Like GOT_TPREL16_DS, but no overflow. */
1896 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1897 0, /* rightshift */
1898 1, /* size (0 = byte, 1 = short, 2 = long) */
1899 16, /* bitsize */
1900 FALSE, /* pc_relative */
1901 0, /* bitpos */
1902 complain_overflow_dont, /* complain_on_overflow */
1903 ppc64_elf_unhandled_reloc, /* special_function */
1904 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1905 FALSE, /* partial_inplace */
1906 0, /* src_mask */
1907 0xfffc, /* dst_mask */
1908 FALSE), /* pcrel_offset */
1909
1910 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1911 HOWTO (R_PPC64_GOT_TPREL16_HI,
1912 16, /* rightshift */
1913 1, /* size (0 = byte, 1 = short, 2 = long) */
1914 16, /* bitsize */
1915 FALSE, /* pc_relative */
1916 0, /* bitpos */
1917 complain_overflow_signed, /* complain_on_overflow */
1918 ppc64_elf_unhandled_reloc, /* special_function */
1919 "R_PPC64_GOT_TPREL16_HI", /* name */
1920 FALSE, /* partial_inplace */
1921 0, /* src_mask */
1922 0xffff, /* dst_mask */
1923 FALSE), /* pcrel_offset */
1924
1925 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1926 HOWTO (R_PPC64_GOT_TPREL16_HA,
1927 16, /* rightshift */
1928 1, /* size (0 = byte, 1 = short, 2 = long) */
1929 16, /* bitsize */
1930 FALSE, /* pc_relative */
1931 0, /* bitpos */
1932 complain_overflow_signed, /* complain_on_overflow */
1933 ppc64_elf_unhandled_reloc, /* special_function */
1934 "R_PPC64_GOT_TPREL16_HA", /* name */
1935 FALSE, /* partial_inplace */
1936 0, /* src_mask */
1937 0xffff, /* dst_mask */
1938 FALSE), /* pcrel_offset */
1939
1940 HOWTO (R_PPC64_JMP_IREL, /* type */
1941 0, /* rightshift */
1942 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1943 0, /* bitsize */
1944 FALSE, /* pc_relative */
1945 0, /* bitpos */
1946 complain_overflow_dont, /* complain_on_overflow */
1947 ppc64_elf_unhandled_reloc, /* special_function */
1948 "R_PPC64_JMP_IREL", /* name */
1949 FALSE, /* partial_inplace */
1950 0, /* src_mask */
1951 0, /* dst_mask */
1952 FALSE), /* pcrel_offset */
1953
1954 HOWTO (R_PPC64_IRELATIVE, /* type */
1955 0, /* rightshift */
1956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1957 64, /* bitsize */
1958 FALSE, /* pc_relative */
1959 0, /* bitpos */
1960 complain_overflow_dont, /* complain_on_overflow */
1961 bfd_elf_generic_reloc, /* special_function */
1962 "R_PPC64_IRELATIVE", /* name */
1963 FALSE, /* partial_inplace */
1964 0, /* src_mask */
1965 ONES (64), /* dst_mask */
1966 FALSE), /* pcrel_offset */
1967
1968 /* A 16 bit relative relocation. */
1969 HOWTO (R_PPC64_REL16, /* type */
1970 0, /* rightshift */
1971 1, /* size (0 = byte, 1 = short, 2 = long) */
1972 16, /* bitsize */
1973 TRUE, /* pc_relative */
1974 0, /* bitpos */
1975 complain_overflow_signed, /* complain_on_overflow */
1976 bfd_elf_generic_reloc, /* special_function */
1977 "R_PPC64_REL16", /* name */
1978 FALSE, /* partial_inplace */
1979 0, /* src_mask */
1980 0xffff, /* dst_mask */
1981 TRUE), /* pcrel_offset */
1982
1983 /* A 16 bit relative relocation without overflow. */
1984 HOWTO (R_PPC64_REL16_LO, /* type */
1985 0, /* rightshift */
1986 1, /* size (0 = byte, 1 = short, 2 = long) */
1987 16, /* bitsize */
1988 TRUE, /* pc_relative */
1989 0, /* bitpos */
1990 complain_overflow_dont,/* complain_on_overflow */
1991 bfd_elf_generic_reloc, /* special_function */
1992 "R_PPC64_REL16_LO", /* name */
1993 FALSE, /* partial_inplace */
1994 0, /* src_mask */
1995 0xffff, /* dst_mask */
1996 TRUE), /* pcrel_offset */
1997
1998 /* The high order 16 bits of a relative address. */
1999 HOWTO (R_PPC64_REL16_HI, /* type */
2000 16, /* rightshift */
2001 1, /* size (0 = byte, 1 = short, 2 = long) */
2002 16, /* bitsize */
2003 TRUE, /* pc_relative */
2004 0, /* bitpos */
2005 complain_overflow_signed, /* complain_on_overflow */
2006 bfd_elf_generic_reloc, /* special_function */
2007 "R_PPC64_REL16_HI", /* name */
2008 FALSE, /* partial_inplace */
2009 0, /* src_mask */
2010 0xffff, /* dst_mask */
2011 TRUE), /* pcrel_offset */
2012
2013 /* The high order 16 bits of a relative address, plus 1 if the contents of
2014 the low 16 bits, treated as a signed number, is negative. */
2015 HOWTO (R_PPC64_REL16_HA, /* type */
2016 16, /* rightshift */
2017 1, /* size (0 = byte, 1 = short, 2 = long) */
2018 16, /* bitsize */
2019 TRUE, /* pc_relative */
2020 0, /* bitpos */
2021 complain_overflow_signed, /* complain_on_overflow */
2022 ppc64_elf_ha_reloc, /* special_function */
2023 "R_PPC64_REL16_HA", /* name */
2024 FALSE, /* partial_inplace */
2025 0, /* src_mask */
2026 0xffff, /* dst_mask */
2027 TRUE), /* pcrel_offset */
2028
2029 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2030 HOWTO (R_PPC64_REL16DX_HA, /* type */
2031 16, /* rightshift */
2032 2, /* size (0 = byte, 1 = short, 2 = long) */
2033 16, /* bitsize */
2034 TRUE, /* pc_relative */
2035 0, /* bitpos */
2036 complain_overflow_signed, /* complain_on_overflow */
2037 ppc64_elf_ha_reloc, /* special_function */
2038 "R_PPC64_REL16DX_HA", /* name */
2039 FALSE, /* partial_inplace */
2040 0, /* src_mask */
2041 0x1fffc1, /* dst_mask */
2042 TRUE), /* pcrel_offset */
2043
2044 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2045 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2046 16, /* rightshift */
2047 1, /* size (0 = byte, 1 = short, 2 = long) */
2048 16, /* bitsize */
2049 FALSE, /* pc_relative */
2050 0, /* bitpos */
2051 complain_overflow_dont, /* complain_on_overflow */
2052 bfd_elf_generic_reloc, /* special_function */
2053 "R_PPC64_ADDR16_HIGH", /* name */
2054 FALSE, /* partial_inplace */
2055 0, /* src_mask */
2056 0xffff, /* dst_mask */
2057 FALSE), /* pcrel_offset */
2058
2059 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2060 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2061 16, /* rightshift */
2062 1, /* size (0 = byte, 1 = short, 2 = long) */
2063 16, /* bitsize */
2064 FALSE, /* pc_relative */
2065 0, /* bitpos */
2066 complain_overflow_dont, /* complain_on_overflow */
2067 ppc64_elf_ha_reloc, /* special_function */
2068 "R_PPC64_ADDR16_HIGHA", /* name */
2069 FALSE, /* partial_inplace */
2070 0, /* src_mask */
2071 0xffff, /* dst_mask */
2072 FALSE), /* pcrel_offset */
2073
2074 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2075 HOWTO (R_PPC64_DTPREL16_HIGH,
2076 16, /* rightshift */
2077 1, /* size (0 = byte, 1 = short, 2 = long) */
2078 16, /* bitsize */
2079 FALSE, /* pc_relative */
2080 0, /* bitpos */
2081 complain_overflow_dont, /* complain_on_overflow */
2082 ppc64_elf_unhandled_reloc, /* special_function */
2083 "R_PPC64_DTPREL16_HIGH", /* name */
2084 FALSE, /* partial_inplace */
2085 0, /* src_mask */
2086 0xffff, /* dst_mask */
2087 FALSE), /* pcrel_offset */
2088
2089 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2090 HOWTO (R_PPC64_DTPREL16_HIGHA,
2091 16, /* rightshift */
2092 1, /* size (0 = byte, 1 = short, 2 = long) */
2093 16, /* bitsize */
2094 FALSE, /* pc_relative */
2095 0, /* bitpos */
2096 complain_overflow_dont, /* complain_on_overflow */
2097 ppc64_elf_unhandled_reloc, /* special_function */
2098 "R_PPC64_DTPREL16_HIGHA", /* name */
2099 FALSE, /* partial_inplace */
2100 0, /* src_mask */
2101 0xffff, /* dst_mask */
2102 FALSE), /* pcrel_offset */
2103
2104 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2105 HOWTO (R_PPC64_TPREL16_HIGH,
2106 16, /* rightshift */
2107 1, /* size (0 = byte, 1 = short, 2 = long) */
2108 16, /* bitsize */
2109 FALSE, /* pc_relative */
2110 0, /* bitpos */
2111 complain_overflow_dont, /* complain_on_overflow */
2112 ppc64_elf_unhandled_reloc, /* special_function */
2113 "R_PPC64_TPREL16_HIGH", /* name */
2114 FALSE, /* partial_inplace */
2115 0, /* src_mask */
2116 0xffff, /* dst_mask */
2117 FALSE), /* pcrel_offset */
2118
2119 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2120 HOWTO (R_PPC64_TPREL16_HIGHA,
2121 16, /* rightshift */
2122 1, /* size (0 = byte, 1 = short, 2 = long) */
2123 16, /* bitsize */
2124 FALSE, /* pc_relative */
2125 0, /* bitpos */
2126 complain_overflow_dont, /* complain_on_overflow */
2127 ppc64_elf_unhandled_reloc, /* special_function */
2128 "R_PPC64_TPREL16_HIGHA", /* name */
2129 FALSE, /* partial_inplace */
2130 0, /* src_mask */
2131 0xffff, /* dst_mask */
2132 FALSE), /* pcrel_offset */
2133
2134 /* Marker reloc on ELFv2 large-model function entry. */
2135 HOWTO (R_PPC64_ENTRY,
2136 0, /* rightshift */
2137 2, /* size (0 = byte, 1 = short, 2 = long) */
2138 32, /* bitsize */
2139 FALSE, /* pc_relative */
2140 0, /* bitpos */
2141 complain_overflow_dont, /* complain_on_overflow */
2142 bfd_elf_generic_reloc, /* special_function */
2143 "R_PPC64_ENTRY", /* name */
2144 FALSE, /* partial_inplace */
2145 0, /* src_mask */
2146 0, /* dst_mask */
2147 FALSE), /* pcrel_offset */
2148
2149 /* Like ADDR64, but use local entry point of function. */
2150 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2151 0, /* rightshift */
2152 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2153 64, /* bitsize */
2154 FALSE, /* pc_relative */
2155 0, /* bitpos */
2156 complain_overflow_dont, /* complain_on_overflow */
2157 bfd_elf_generic_reloc, /* special_function */
2158 "R_PPC64_ADDR64_LOCAL", /* name */
2159 FALSE, /* partial_inplace */
2160 0, /* src_mask */
2161 ONES (64), /* dst_mask */
2162 FALSE), /* pcrel_offset */
2163
2164 /* GNU extension to record C++ vtable hierarchy. */
2165 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2166 0, /* rightshift */
2167 0, /* size (0 = byte, 1 = short, 2 = long) */
2168 0, /* bitsize */
2169 FALSE, /* pc_relative */
2170 0, /* bitpos */
2171 complain_overflow_dont, /* complain_on_overflow */
2172 NULL, /* special_function */
2173 "R_PPC64_GNU_VTINHERIT", /* name */
2174 FALSE, /* partial_inplace */
2175 0, /* src_mask */
2176 0, /* dst_mask */
2177 FALSE), /* pcrel_offset */
2178
2179 /* GNU extension to record C++ vtable member usage. */
2180 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2181 0, /* rightshift */
2182 0, /* size (0 = byte, 1 = short, 2 = long) */
2183 0, /* bitsize */
2184 FALSE, /* pc_relative */
2185 0, /* bitpos */
2186 complain_overflow_dont, /* complain_on_overflow */
2187 NULL, /* special_function */
2188 "R_PPC64_GNU_VTENTRY", /* name */
2189 FALSE, /* partial_inplace */
2190 0, /* src_mask */
2191 0, /* dst_mask */
2192 FALSE), /* pcrel_offset */
2193 };
2194
2195 \f
2196 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2197 be done. */
2198
2199 static void
2200 ppc_howto_init (void)
2201 {
2202 unsigned int i, type;
2203
2204 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2205 {
2206 type = ppc64_elf_howto_raw[i].type;
2207 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2208 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2209 }
2210 }
2211
2212 static reloc_howto_type *
2213 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2214 bfd_reloc_code_real_type code)
2215 {
2216 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2217
2218 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2219 /* Initialize howto table if needed. */
2220 ppc_howto_init ();
2221
2222 switch (code)
2223 {
2224 default:
2225 return NULL;
2226
2227 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2228 break;
2229 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2230 break;
2231 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2232 break;
2233 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2234 break;
2235 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2236 break;
2237 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2238 break;
2239 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2240 break;
2241 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2242 break;
2243 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2244 break;
2245 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2246 break;
2247 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2248 break;
2249 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2250 break;
2251 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2252 break;
2253 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2254 break;
2255 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2256 break;
2257 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2258 break;
2259 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2260 break;
2261 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2262 break;
2263 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2266 break;
2267 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2268 break;
2269 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2270 break;
2271 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2272 break;
2273 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2274 break;
2275 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2276 break;
2277 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2278 break;
2279 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2280 break;
2281 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2282 break;
2283 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2284 break;
2285 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2286 break;
2287 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2288 break;
2289 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2290 break;
2291 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2292 break;
2293 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2294 break;
2295 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2296 break;
2297 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2298 break;
2299 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2300 break;
2301 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2302 break;
2303 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2304 break;
2305 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2306 break;
2307 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2308 break;
2309 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2310 break;
2311 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2312 break;
2313 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2314 break;
2315 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2316 break;
2317 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2318 break;
2319 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2320 break;
2321 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2322 break;
2323 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2324 break;
2325 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2326 break;
2327 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2328 break;
2329 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2330 break;
2331 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2332 break;
2333 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2334 break;
2335 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2336 break;
2337 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2338 break;
2339 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2340 break;
2341 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2342 break;
2343 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2346 break;
2347 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2348 break;
2349 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2350 break;
2351 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2352 break;
2353 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2354 break;
2355 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2356 break;
2357 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2358 break;
2359 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2360 break;
2361 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2362 break;
2363 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2364 break;
2365 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2368 break;
2369 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2370 break;
2371 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2372 break;
2373 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2374 break;
2375 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2376 break;
2377 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2378 break;
2379 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2382 break;
2383 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2384 break;
2385 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2386 break;
2387 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2388 break;
2389 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2390 break;
2391 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2392 break;
2393 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2394 break;
2395 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2396 break;
2397 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2398 break;
2399 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2400 break;
2401 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2402 break;
2403 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2408 break;
2409 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2410 break;
2411 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2412 break;
2413 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2414 break;
2415 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2416 break;
2417 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2418 break;
2419 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2422 break;
2423 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2426 break;
2427 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2428 break;
2429 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2436 break;
2437 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2440 break;
2441 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2442 break;
2443 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2444 break;
2445 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2446 break;
2447 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2448 break;
2449 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2450 break;
2451 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2452 break;
2453 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2454 break;
2455 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2456 break;
2457 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2458 break;
2459 }
2460
2461 return ppc64_elf_howto_table[r];
2462 };
2463
2464 static reloc_howto_type *
2465 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2466 const char *r_name)
2467 {
2468 unsigned int i;
2469
2470 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2471 if (ppc64_elf_howto_raw[i].name != NULL
2472 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2473 return &ppc64_elf_howto_raw[i];
2474
2475 return NULL;
2476 }
2477
2478 /* Set the howto pointer for a PowerPC ELF reloc. */
2479
2480 static void
2481 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2482 Elf_Internal_Rela *dst)
2483 {
2484 unsigned int type;
2485
2486 /* Initialize howto table if needed. */
2487 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2488 ppc_howto_init ();
2489
2490 type = ELF64_R_TYPE (dst->r_info);
2491 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2492 {
2493 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2494 abfd, (int) type);
2495 type = R_PPC64_NONE;
2496 }
2497 cache_ptr->howto = ppc64_elf_howto_table[type];
2498 }
2499
2500 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2501
2502 static bfd_reloc_status_type
2503 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2504 void *data, asection *input_section,
2505 bfd *output_bfd, char **error_message)
2506 {
2507 enum elf_ppc64_reloc_type r_type;
2508 long insn;
2509 bfd_size_type octets;
2510 bfd_vma value;
2511
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 /* Adjust the addend for sign extension of the low 16 bits.
2520 We won't actually be using the low 16 bits, so trashing them
2521 doesn't matter. */
2522 reloc_entry->addend += 0x8000;
2523 r_type = reloc_entry->howto->type;
2524 if (r_type != R_PPC64_REL16DX_HA)
2525 return bfd_reloc_continue;
2526
2527 value = 0;
2528 if (!bfd_is_com_section (symbol->section))
2529 value = symbol->value;
2530 value += (reloc_entry->addend
2531 + symbol->section->output_offset
2532 + symbol->section->output_section->vma);
2533 value -= (reloc_entry->address
2534 + input_section->output_offset
2535 + input_section->output_section->vma);
2536 value = (bfd_signed_vma) value >> 16;
2537
2538 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2539 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2540 insn &= ~0x1fffc1;
2541 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2542 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2543 if (value + 0x8000 > 0xffff)
2544 return bfd_reloc_overflow;
2545 return bfd_reloc_ok;
2546 }
2547
2548 static bfd_reloc_status_type
2549 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2550 void *data, asection *input_section,
2551 bfd *output_bfd, char **error_message)
2552 {
2553 if (output_bfd != NULL)
2554 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2555 input_section, output_bfd, error_message);
2556
2557 if (strcmp (symbol->section->name, ".opd") == 0
2558 && (symbol->section->owner->flags & DYNAMIC) == 0)
2559 {
2560 bfd_vma dest = opd_entry_value (symbol->section,
2561 symbol->value + reloc_entry->addend,
2562 NULL, NULL, FALSE);
2563 if (dest != (bfd_vma) -1)
2564 reloc_entry->addend = dest - (symbol->value
2565 + symbol->section->output_section->vma
2566 + symbol->section->output_offset);
2567 }
2568 else
2569 {
2570 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2571
2572 if (symbol->section->owner != abfd
2573 && abiversion (symbol->section->owner) >= 2)
2574 {
2575 unsigned int i;
2576
2577 for (i = 0; i < symbol->section->owner->symcount; ++i)
2578 {
2579 asymbol *symdef = symbol->section->owner->outsymbols[i];
2580
2581 if (strcmp (symdef->name, symbol->name) == 0)
2582 {
2583 elfsym = (elf_symbol_type *) symdef;
2584 break;
2585 }
2586 }
2587 }
2588 reloc_entry->addend
2589 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2590 }
2591 return bfd_reloc_continue;
2592 }
2593
2594 static bfd_reloc_status_type
2595 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2596 void *data, asection *input_section,
2597 bfd *output_bfd, char **error_message)
2598 {
2599 long insn;
2600 enum elf_ppc64_reloc_type r_type;
2601 bfd_size_type octets;
2602 /* Assume 'at' branch hints. */
2603 bfd_boolean is_isa_v2 = TRUE;
2604
2605 /* If this is a relocatable link (output_bfd test tells us), just
2606 call the generic function. Any adjustment will be done at final
2607 link time. */
2608 if (output_bfd != NULL)
2609 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2610 input_section, output_bfd, error_message);
2611
2612 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2613 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2614 insn &= ~(0x01 << 21);
2615 r_type = reloc_entry->howto->type;
2616 if (r_type == R_PPC64_ADDR14_BRTAKEN
2617 || r_type == R_PPC64_REL14_BRTAKEN)
2618 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2619
2620 if (is_isa_v2)
2621 {
2622 /* Set 'a' bit. This is 0b00010 in BO field for branch
2623 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2624 for branch on CTR insns (BO == 1a00t or 1a01t). */
2625 if ((insn & (0x14 << 21)) == (0x04 << 21))
2626 insn |= 0x02 << 21;
2627 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2628 insn |= 0x08 << 21;
2629 else
2630 goto out;
2631 }
2632 else
2633 {
2634 bfd_vma target = 0;
2635 bfd_vma from;
2636
2637 if (!bfd_is_com_section (symbol->section))
2638 target = symbol->value;
2639 target += symbol->section->output_section->vma;
2640 target += symbol->section->output_offset;
2641 target += reloc_entry->addend;
2642
2643 from = (reloc_entry->address
2644 + input_section->output_offset
2645 + input_section->output_section->vma);
2646
2647 /* Invert 'y' bit if not the default. */
2648 if ((bfd_signed_vma) (target - from) < 0)
2649 insn ^= 0x01 << 21;
2650 }
2651 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2652 out:
2653 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2654 input_section, output_bfd, error_message);
2655 }
2656
2657 static bfd_reloc_status_type
2658 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2659 void *data, asection *input_section,
2660 bfd *output_bfd, char **error_message)
2661 {
2662 /* If this is a relocatable link (output_bfd test tells us), just
2663 call the generic function. Any adjustment will be done at final
2664 link time. */
2665 if (output_bfd != NULL)
2666 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2667 input_section, output_bfd, error_message);
2668
2669 /* Subtract the symbol section base address. */
2670 reloc_entry->addend -= symbol->section->output_section->vma;
2671 return bfd_reloc_continue;
2672 }
2673
2674 static bfd_reloc_status_type
2675 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2676 void *data, asection *input_section,
2677 bfd *output_bfd, char **error_message)
2678 {
2679 /* If this is a relocatable link (output_bfd test tells us), just
2680 call the generic function. Any adjustment will be done at final
2681 link time. */
2682 if (output_bfd != NULL)
2683 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2684 input_section, output_bfd, error_message);
2685
2686 /* Subtract the symbol section base address. */
2687 reloc_entry->addend -= symbol->section->output_section->vma;
2688
2689 /* Adjust the addend for sign extension of the low 16 bits. */
2690 reloc_entry->addend += 0x8000;
2691 return bfd_reloc_continue;
2692 }
2693
2694 static bfd_reloc_status_type
2695 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2696 void *data, asection *input_section,
2697 bfd *output_bfd, char **error_message)
2698 {
2699 bfd_vma TOCstart;
2700
2701 /* If this is a relocatable link (output_bfd test tells us), just
2702 call the generic function. Any adjustment will be done at final
2703 link time. */
2704 if (output_bfd != NULL)
2705 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2706 input_section, output_bfd, error_message);
2707
2708 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2709 if (TOCstart == 0)
2710 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2711
2712 /* Subtract the TOC base address. */
2713 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2714 return bfd_reloc_continue;
2715 }
2716
2717 static bfd_reloc_status_type
2718 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2719 void *data, asection *input_section,
2720 bfd *output_bfd, char **error_message)
2721 {
2722 bfd_vma TOCstart;
2723
2724 /* If this is a relocatable link (output_bfd test tells us), just
2725 call the generic function. Any adjustment will be done at final
2726 link time. */
2727 if (output_bfd != NULL)
2728 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2729 input_section, output_bfd, error_message);
2730
2731 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2732 if (TOCstart == 0)
2733 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2734
2735 /* Subtract the TOC base address. */
2736 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2737
2738 /* Adjust the addend for sign extension of the low 16 bits. */
2739 reloc_entry->addend += 0x8000;
2740 return bfd_reloc_continue;
2741 }
2742
2743 static bfd_reloc_status_type
2744 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2745 void *data, asection *input_section,
2746 bfd *output_bfd, char **error_message)
2747 {
2748 bfd_vma TOCstart;
2749 bfd_size_type octets;
2750
2751 /* If this is a relocatable link (output_bfd test tells us), just
2752 call the generic function. Any adjustment will be done at final
2753 link time. */
2754 if (output_bfd != NULL)
2755 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2756 input_section, output_bfd, error_message);
2757
2758 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2759 if (TOCstart == 0)
2760 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2761
2762 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2763 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2764 return bfd_reloc_ok;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 /* If this is a relocatable link (output_bfd test tells us), just
2773 call the generic function. Any adjustment will be done at final
2774 link time. */
2775 if (output_bfd != NULL)
2776 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2777 input_section, output_bfd, error_message);
2778
2779 if (error_message != NULL)
2780 {
2781 static char buf[60];
2782 sprintf (buf, "generic linker can't handle %s",
2783 reloc_entry->howto->name);
2784 *error_message = buf;
2785 }
2786 return bfd_reloc_dangerous;
2787 }
2788
2789 /* Track GOT entries needed for a given symbol. We might need more
2790 than one got entry per symbol. */
2791 struct got_entry
2792 {
2793 struct got_entry *next;
2794
2795 /* The symbol addend that we'll be placing in the GOT. */
2796 bfd_vma addend;
2797
2798 /* Unlike other ELF targets, we use separate GOT entries for the same
2799 symbol referenced from different input files. This is to support
2800 automatic multiple TOC/GOT sections, where the TOC base can vary
2801 from one input file to another. After partitioning into TOC groups
2802 we merge entries within the group.
2803
2804 Point to the BFD owning this GOT entry. */
2805 bfd *owner;
2806
2807 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2808 TLS_TPREL or TLS_DTPREL for tls entries. */
2809 unsigned char tls_type;
2810
2811 /* Non-zero if got.ent points to real entry. */
2812 unsigned char is_indirect;
2813
2814 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2815 union
2816 {
2817 bfd_signed_vma refcount;
2818 bfd_vma offset;
2819 struct got_entry *ent;
2820 } got;
2821 };
2822
2823 /* The same for PLT. */
2824 struct plt_entry
2825 {
2826 struct plt_entry *next;
2827
2828 bfd_vma addend;
2829
2830 union
2831 {
2832 bfd_signed_vma refcount;
2833 bfd_vma offset;
2834 } plt;
2835 };
2836
2837 struct ppc64_elf_obj_tdata
2838 {
2839 struct elf_obj_tdata elf;
2840
2841 /* Shortcuts to dynamic linker sections. */
2842 asection *got;
2843 asection *relgot;
2844
2845 /* Used during garbage collection. We attach global symbols defined
2846 on removed .opd entries to this section so that the sym is removed. */
2847 asection *deleted_section;
2848
2849 /* TLS local dynamic got entry handling. Support for multiple GOT
2850 sections means we potentially need one of these for each input bfd. */
2851 struct got_entry tlsld_got;
2852
2853 union {
2854 /* A copy of relocs before they are modified for --emit-relocs. */
2855 Elf_Internal_Rela *relocs;
2856
2857 /* Section contents. */
2858 bfd_byte *contents;
2859 } opd;
2860
2861 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2862 the reloc to be in the range -32768 to 32767. */
2863 unsigned int has_small_toc_reloc : 1;
2864
2865 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2866 instruction not one we handle. */
2867 unsigned int unexpected_toc_insn : 1;
2868 };
2869
2870 #define ppc64_elf_tdata(bfd) \
2871 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2872
2873 #define ppc64_tlsld_got(bfd) \
2874 (&ppc64_elf_tdata (bfd)->tlsld_got)
2875
2876 #define is_ppc64_elf(bfd) \
2877 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2878 && elf_object_id (bfd) == PPC64_ELF_DATA)
2879
2880 /* Override the generic function because we store some extras. */
2881
2882 static bfd_boolean
2883 ppc64_elf_mkobject (bfd *abfd)
2884 {
2885 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2886 PPC64_ELF_DATA);
2887 }
2888
2889 /* Fix bad default arch selected for a 64 bit input bfd when the
2890 default is 32 bit. */
2891
2892 static bfd_boolean
2893 ppc64_elf_object_p (bfd *abfd)
2894 {
2895 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2896 {
2897 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2898
2899 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2900 {
2901 /* Relies on arch after 32 bit default being 64 bit default. */
2902 abfd->arch_info = abfd->arch_info->next;
2903 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2904 }
2905 }
2906 return TRUE;
2907 }
2908
2909 /* Support for core dump NOTE sections. */
2910
2911 static bfd_boolean
2912 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2913 {
2914 size_t offset, size;
2915
2916 if (note->descsz != 504)
2917 return FALSE;
2918
2919 /* pr_cursig */
2920 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2921
2922 /* pr_pid */
2923 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2924
2925 /* pr_reg */
2926 offset = 112;
2927 size = 384;
2928
2929 /* Make a ".reg/999" section. */
2930 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2931 size, note->descpos + offset);
2932 }
2933
2934 static bfd_boolean
2935 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2936 {
2937 if (note->descsz != 136)
2938 return FALSE;
2939
2940 elf_tdata (abfd)->core->pid
2941 = bfd_get_32 (abfd, note->descdata + 24);
2942 elf_tdata (abfd)->core->program
2943 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2944 elf_tdata (abfd)->core->command
2945 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2946
2947 return TRUE;
2948 }
2949
2950 static char *
2951 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2952 ...)
2953 {
2954 switch (note_type)
2955 {
2956 default:
2957 return NULL;
2958
2959 case NT_PRPSINFO:
2960 {
2961 char data[136];
2962 va_list ap;
2963
2964 va_start (ap, note_type);
2965 memset (data, 0, sizeof (data));
2966 strncpy (data + 40, va_arg (ap, const char *), 16);
2967 strncpy (data + 56, va_arg (ap, const char *), 80);
2968 va_end (ap);
2969 return elfcore_write_note (abfd, buf, bufsiz,
2970 "CORE", note_type, data, sizeof (data));
2971 }
2972
2973 case NT_PRSTATUS:
2974 {
2975 char data[504];
2976 va_list ap;
2977 long pid;
2978 int cursig;
2979 const void *greg;
2980
2981 va_start (ap, note_type);
2982 memset (data, 0, 112);
2983 pid = va_arg (ap, long);
2984 bfd_put_32 (abfd, pid, data + 32);
2985 cursig = va_arg (ap, int);
2986 bfd_put_16 (abfd, cursig, data + 12);
2987 greg = va_arg (ap, const void *);
2988 memcpy (data + 112, greg, 384);
2989 memset (data + 496, 0, 8);
2990 va_end (ap);
2991 return elfcore_write_note (abfd, buf, bufsiz,
2992 "CORE", note_type, data, sizeof (data));
2993 }
2994 }
2995 }
2996
2997 /* Add extra PPC sections. */
2998
2999 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3000 {
3001 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3002 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3003 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3004 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3005 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3006 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3007 { NULL, 0, 0, 0, 0 }
3008 };
3009
3010 enum _ppc64_sec_type {
3011 sec_normal = 0,
3012 sec_opd = 1,
3013 sec_toc = 2
3014 };
3015
3016 struct _ppc64_elf_section_data
3017 {
3018 struct bfd_elf_section_data elf;
3019
3020 union
3021 {
3022 /* An array with one entry for each opd function descriptor,
3023 and some spares since opd entries may be either 16 or 24 bytes. */
3024 #define OPD_NDX(OFF) ((OFF) >> 4)
3025 struct _opd_sec_data
3026 {
3027 /* Points to the function code section for local opd entries. */
3028 asection **func_sec;
3029
3030 /* After editing .opd, adjust references to opd local syms. */
3031 long *adjust;
3032 } opd;
3033
3034 /* An array for toc sections, indexed by offset/8. */
3035 struct _toc_sec_data
3036 {
3037 /* Specifies the relocation symbol index used at a given toc offset. */
3038 unsigned *symndx;
3039
3040 /* And the relocation addend. */
3041 bfd_vma *add;
3042 } toc;
3043 } u;
3044
3045 enum _ppc64_sec_type sec_type:2;
3046
3047 /* Flag set when small branches are detected. Used to
3048 select suitable defaults for the stub group size. */
3049 unsigned int has_14bit_branch:1;
3050 };
3051
3052 #define ppc64_elf_section_data(sec) \
3053 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3054
3055 static bfd_boolean
3056 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3057 {
3058 if (!sec->used_by_bfd)
3059 {
3060 struct _ppc64_elf_section_data *sdata;
3061 bfd_size_type amt = sizeof (*sdata);
3062
3063 sdata = bfd_zalloc (abfd, amt);
3064 if (sdata == NULL)
3065 return FALSE;
3066 sec->used_by_bfd = sdata;
3067 }
3068
3069 return _bfd_elf_new_section_hook (abfd, sec);
3070 }
3071
3072 static struct _opd_sec_data *
3073 get_opd_info (asection * sec)
3074 {
3075 if (sec != NULL
3076 && ppc64_elf_section_data (sec) != NULL
3077 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3078 return &ppc64_elf_section_data (sec)->u.opd;
3079 return NULL;
3080 }
3081 \f
3082 /* Parameters for the qsort hook. */
3083 static bfd_boolean synthetic_relocatable;
3084
3085 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3086
3087 static int
3088 compare_symbols (const void *ap, const void *bp)
3089 {
3090 const asymbol *a = * (const asymbol **) ap;
3091 const asymbol *b = * (const asymbol **) bp;
3092
3093 /* Section symbols first. */
3094 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3095 return -1;
3096 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3097 return 1;
3098
3099 /* then .opd symbols. */
3100 if (strcmp (a->section->name, ".opd") == 0
3101 && strcmp (b->section->name, ".opd") != 0)
3102 return -1;
3103 if (strcmp (a->section->name, ".opd") != 0
3104 && strcmp (b->section->name, ".opd") == 0)
3105 return 1;
3106
3107 /* then other code symbols. */
3108 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3109 == (SEC_CODE | SEC_ALLOC)
3110 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3111 != (SEC_CODE | SEC_ALLOC))
3112 return -1;
3113
3114 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3115 != (SEC_CODE | SEC_ALLOC)
3116 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3117 == (SEC_CODE | SEC_ALLOC))
3118 return 1;
3119
3120 if (synthetic_relocatable)
3121 {
3122 if (a->section->id < b->section->id)
3123 return -1;
3124
3125 if (a->section->id > b->section->id)
3126 return 1;
3127 }
3128
3129 if (a->value + a->section->vma < b->value + b->section->vma)
3130 return -1;
3131
3132 if (a->value + a->section->vma > b->value + b->section->vma)
3133 return 1;
3134
3135 /* For syms with the same value, prefer strong dynamic global function
3136 syms over other syms. */
3137 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3138 return -1;
3139
3140 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3141 return 1;
3142
3143 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3144 return -1;
3145
3146 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3147 return 1;
3148
3149 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3150 return -1;
3151
3152 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3153 return 1;
3154
3155 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3156 return -1;
3157
3158 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3159 return 1;
3160
3161 return 0;
3162 }
3163
3164 /* Search SYMS for a symbol of the given VALUE. */
3165
3166 static asymbol *
3167 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3168 {
3169 long mid;
3170
3171 if (id == (unsigned) -1)
3172 {
3173 while (lo < hi)
3174 {
3175 mid = (lo + hi) >> 1;
3176 if (syms[mid]->value + syms[mid]->section->vma < value)
3177 lo = mid + 1;
3178 else if (syms[mid]->value + syms[mid]->section->vma > value)
3179 hi = mid;
3180 else
3181 return syms[mid];
3182 }
3183 }
3184 else
3185 {
3186 while (lo < hi)
3187 {
3188 mid = (lo + hi) >> 1;
3189 if (syms[mid]->section->id < id)
3190 lo = mid + 1;
3191 else if (syms[mid]->section->id > id)
3192 hi = mid;
3193 else if (syms[mid]->value < value)
3194 lo = mid + 1;
3195 else if (syms[mid]->value > value)
3196 hi = mid;
3197 else
3198 return syms[mid];
3199 }
3200 }
3201 return NULL;
3202 }
3203
3204 static bfd_boolean
3205 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3206 {
3207 bfd_vma vma = *(bfd_vma *) ptr;
3208 return ((section->flags & SEC_ALLOC) != 0
3209 && section->vma <= vma
3210 && vma < section->vma + section->size);
3211 }
3212
3213 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3214 entry syms. Also generate @plt symbols for the glink branch table.
3215 Returns count of synthetic symbols in RET or -1 on error. */
3216
3217 static long
3218 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3219 long static_count, asymbol **static_syms,
3220 long dyn_count, asymbol **dyn_syms,
3221 asymbol **ret)
3222 {
3223 asymbol *s;
3224 long i;
3225 long count;
3226 char *names;
3227 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3228 asection *opd = NULL;
3229 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3230 asymbol **syms;
3231 int abi = abiversion (abfd);
3232
3233 *ret = NULL;
3234
3235 if (abi < 2)
3236 {
3237 opd = bfd_get_section_by_name (abfd, ".opd");
3238 if (opd == NULL && abi == 1)
3239 return 0;
3240 }
3241
3242 symcount = static_count;
3243 if (!relocatable)
3244 symcount += dyn_count;
3245 if (symcount == 0)
3246 return 0;
3247
3248 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3249 if (syms == NULL)
3250 return -1;
3251
3252 if (!relocatable && static_count != 0 && dyn_count != 0)
3253 {
3254 /* Use both symbol tables. */
3255 memcpy (syms, static_syms, static_count * sizeof (*syms));
3256 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3257 }
3258 else if (!relocatable && static_count == 0)
3259 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3260 else
3261 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3262
3263 synthetic_relocatable = relocatable;
3264 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3265
3266 if (!relocatable && symcount > 1)
3267 {
3268 long j;
3269 /* Trim duplicate syms, since we may have merged the normal and
3270 dynamic symbols. Actually, we only care about syms that have
3271 different values, so trim any with the same value. */
3272 for (i = 1, j = 1; i < symcount; ++i)
3273 if (syms[i - 1]->value + syms[i - 1]->section->vma
3274 != syms[i]->value + syms[i]->section->vma)
3275 syms[j++] = syms[i];
3276 symcount = j;
3277 }
3278
3279 i = 0;
3280 if (strcmp (syms[i]->section->name, ".opd") == 0)
3281 ++i;
3282 codesecsym = i;
3283
3284 for (; i < symcount; ++i)
3285 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3286 != (SEC_CODE | SEC_ALLOC))
3287 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3288 break;
3289 codesecsymend = i;
3290
3291 for (; i < symcount; ++i)
3292 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3293 break;
3294 secsymend = i;
3295
3296 for (; i < symcount; ++i)
3297 if (strcmp (syms[i]->section->name, ".opd") != 0)
3298 break;
3299 opdsymend = i;
3300
3301 for (; i < symcount; ++i)
3302 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3303 != (SEC_CODE | SEC_ALLOC))
3304 break;
3305 symcount = i;
3306
3307 count = 0;
3308
3309 if (relocatable)
3310 {
3311 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3312 arelent *r;
3313 size_t size;
3314 long relcount;
3315
3316 if (opdsymend == secsymend)
3317 goto done;
3318
3319 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3320 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3321 if (relcount == 0)
3322 goto done;
3323
3324 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3325 {
3326 count = -1;
3327 goto done;
3328 }
3329
3330 size = 0;
3331 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3332 {
3333 asymbol *sym;
3334
3335 while (r < opd->relocation + relcount
3336 && r->address < syms[i]->value + opd->vma)
3337 ++r;
3338
3339 if (r == opd->relocation + relcount)
3340 break;
3341
3342 if (r->address != syms[i]->value + opd->vma)
3343 continue;
3344
3345 if (r->howto->type != R_PPC64_ADDR64)
3346 continue;
3347
3348 sym = *r->sym_ptr_ptr;
3349 if (!sym_exists_at (syms, opdsymend, symcount,
3350 sym->section->id, sym->value + r->addend))
3351 {
3352 ++count;
3353 size += sizeof (asymbol);
3354 size += strlen (syms[i]->name) + 2;
3355 }
3356 }
3357
3358 if (size == 0)
3359 goto done;
3360 s = *ret = bfd_malloc (size);
3361 if (s == NULL)
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 names = (char *) (s + count);
3368
3369 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3370 {
3371 asymbol *sym;
3372
3373 while (r < opd->relocation + relcount
3374 && r->address < syms[i]->value + opd->vma)
3375 ++r;
3376
3377 if (r == opd->relocation + relcount)
3378 break;
3379
3380 if (r->address != syms[i]->value + opd->vma)
3381 continue;
3382
3383 if (r->howto->type != R_PPC64_ADDR64)
3384 continue;
3385
3386 sym = *r->sym_ptr_ptr;
3387 if (!sym_exists_at (syms, opdsymend, symcount,
3388 sym->section->id, sym->value + r->addend))
3389 {
3390 size_t len;
3391
3392 *s = *syms[i];
3393 s->flags |= BSF_SYNTHETIC;
3394 s->section = sym->section;
3395 s->value = sym->value + r->addend;
3396 s->name = names;
3397 *names++ = '.';
3398 len = strlen (syms[i]->name);
3399 memcpy (names, syms[i]->name, len + 1);
3400 names += len + 1;
3401 /* Have udata.p point back to the original symbol this
3402 synthetic symbol was derived from. */
3403 s->udata.p = syms[i];
3404 s++;
3405 }
3406 }
3407 }
3408 else
3409 {
3410 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3411 bfd_byte *contents = NULL;
3412 size_t size;
3413 long plt_count = 0;
3414 bfd_vma glink_vma = 0, resolv_vma = 0;
3415 asection *dynamic, *glink = NULL, *relplt = NULL;
3416 arelent *p;
3417
3418 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3419 {
3420 free_contents_and_exit_err:
3421 count = -1;
3422 free_contents_and_exit:
3423 if (contents)
3424 free (contents);
3425 goto done;
3426 }
3427
3428 size = 0;
3429 for (i = secsymend; i < opdsymend; ++i)
3430 {
3431 bfd_vma ent;
3432
3433 /* Ignore bogus symbols. */
3434 if (syms[i]->value > opd->size - 8)
3435 continue;
3436
3437 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3438 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3439 {
3440 ++count;
3441 size += sizeof (asymbol);
3442 size += strlen (syms[i]->name) + 2;
3443 }
3444 }
3445
3446 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3447 if (dyn_count != 0
3448 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3449 {
3450 bfd_byte *dynbuf, *extdyn, *extdynend;
3451 size_t extdynsize;
3452 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3453
3454 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3455 goto free_contents_and_exit_err;
3456
3457 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3458 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3459
3460 extdyn = dynbuf;
3461 extdynend = extdyn + dynamic->size;
3462 for (; extdyn < extdynend; extdyn += extdynsize)
3463 {
3464 Elf_Internal_Dyn dyn;
3465 (*swap_dyn_in) (abfd, extdyn, &dyn);
3466
3467 if (dyn.d_tag == DT_NULL)
3468 break;
3469
3470 if (dyn.d_tag == DT_PPC64_GLINK)
3471 {
3472 /* The first glink stub starts at offset 32; see
3473 comment in ppc64_elf_finish_dynamic_sections. */
3474 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3475 /* The .glink section usually does not survive the final
3476 link; search for the section (usually .text) where the
3477 glink stubs now reside. */
3478 glink = bfd_sections_find_if (abfd, section_covers_vma,
3479 &glink_vma);
3480 break;
3481 }
3482 }
3483
3484 free (dynbuf);
3485 }
3486
3487 if (glink != NULL)
3488 {
3489 /* Determine __glink trampoline by reading the relative branch
3490 from the first glink stub. */
3491 bfd_byte buf[4];
3492 unsigned int off = 0;
3493
3494 while (bfd_get_section_contents (abfd, glink, buf,
3495 glink_vma + off - glink->vma, 4))
3496 {
3497 unsigned int insn = bfd_get_32 (abfd, buf);
3498 insn ^= B_DOT;
3499 if ((insn & ~0x3fffffc) == 0)
3500 {
3501 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3502 break;
3503 }
3504 off += 4;
3505 if (off > 4)
3506 break;
3507 }
3508
3509 if (resolv_vma)
3510 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3511
3512 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3513 if (relplt != NULL)
3514 {
3515 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3516 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3517 goto free_contents_and_exit_err;
3518
3519 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3520 size += plt_count * sizeof (asymbol);
3521
3522 p = relplt->relocation;
3523 for (i = 0; i < plt_count; i++, p++)
3524 {
3525 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3526 if (p->addend != 0)
3527 size += sizeof ("+0x") - 1 + 16;
3528 }
3529 }
3530 }
3531
3532 if (size == 0)
3533 goto free_contents_and_exit;
3534 s = *ret = bfd_malloc (size);
3535 if (s == NULL)
3536 goto free_contents_and_exit_err;
3537
3538 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3539
3540 for (i = secsymend; i < opdsymend; ++i)
3541 {
3542 bfd_vma ent;
3543
3544 if (syms[i]->value > opd->size - 8)
3545 continue;
3546
3547 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3548 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3549 {
3550 long lo, hi;
3551 size_t len;
3552 asection *sec = abfd->sections;
3553
3554 *s = *syms[i];
3555 lo = codesecsym;
3556 hi = codesecsymend;
3557 while (lo < hi)
3558 {
3559 long mid = (lo + hi) >> 1;
3560 if (syms[mid]->section->vma < ent)
3561 lo = mid + 1;
3562 else if (syms[mid]->section->vma > ent)
3563 hi = mid;
3564 else
3565 {
3566 sec = syms[mid]->section;
3567 break;
3568 }
3569 }
3570
3571 if (lo >= hi && lo > codesecsym)
3572 sec = syms[lo - 1]->section;
3573
3574 for (; sec != NULL; sec = sec->next)
3575 {
3576 if (sec->vma > ent)
3577 break;
3578 /* SEC_LOAD may not be set if SEC is from a separate debug
3579 info file. */
3580 if ((sec->flags & SEC_ALLOC) == 0)
3581 break;
3582 if ((sec->flags & SEC_CODE) != 0)
3583 s->section = sec;
3584 }
3585 s->flags |= BSF_SYNTHETIC;
3586 s->value = ent - s->section->vma;
3587 s->name = names;
3588 *names++ = '.';
3589 len = strlen (syms[i]->name);
3590 memcpy (names, syms[i]->name, len + 1);
3591 names += len + 1;
3592 /* Have udata.p point back to the original symbol this
3593 synthetic symbol was derived from. */
3594 s->udata.p = syms[i];
3595 s++;
3596 }
3597 }
3598 free (contents);
3599
3600 if (glink != NULL && relplt != NULL)
3601 {
3602 if (resolv_vma)
3603 {
3604 /* Add a symbol for the main glink trampoline. */
3605 memset (s, 0, sizeof *s);
3606 s->the_bfd = abfd;
3607 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3608 s->section = glink;
3609 s->value = resolv_vma - glink->vma;
3610 s->name = names;
3611 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3612 names += sizeof ("__glink_PLTresolve");
3613 s++;
3614 count++;
3615 }
3616
3617 /* FIXME: It would be very much nicer to put sym@plt on the
3618 stub rather than on the glink branch table entry. The
3619 objdump disassembler would then use a sensible symbol
3620 name on plt calls. The difficulty in doing so is
3621 a) finding the stubs, and,
3622 b) matching stubs against plt entries, and,
3623 c) there can be multiple stubs for a given plt entry.
3624
3625 Solving (a) could be done by code scanning, but older
3626 ppc64 binaries used different stubs to current code.
3627 (b) is the tricky one since you need to known the toc
3628 pointer for at least one function that uses a pic stub to
3629 be able to calculate the plt address referenced.
3630 (c) means gdb would need to set multiple breakpoints (or
3631 find the glink branch itself) when setting breakpoints
3632 for pending shared library loads. */
3633 p = relplt->relocation;
3634 for (i = 0; i < plt_count; i++, p++)
3635 {
3636 size_t len;
3637
3638 *s = **p->sym_ptr_ptr;
3639 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3640 we are defining a symbol, ensure one of them is set. */
3641 if ((s->flags & BSF_LOCAL) == 0)
3642 s->flags |= BSF_GLOBAL;
3643 s->flags |= BSF_SYNTHETIC;
3644 s->section = glink;
3645 s->value = glink_vma - glink->vma;
3646 s->name = names;
3647 s->udata.p = NULL;
3648 len = strlen ((*p->sym_ptr_ptr)->name);
3649 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3650 names += len;
3651 if (p->addend != 0)
3652 {
3653 memcpy (names, "+0x", sizeof ("+0x") - 1);
3654 names += sizeof ("+0x") - 1;
3655 bfd_sprintf_vma (abfd, names, p->addend);
3656 names += strlen (names);
3657 }
3658 memcpy (names, "@plt", sizeof ("@plt"));
3659 names += sizeof ("@plt");
3660 s++;
3661 if (abi < 2)
3662 {
3663 glink_vma += 8;
3664 if (i >= 0x8000)
3665 glink_vma += 4;
3666 }
3667 else
3668 glink_vma += 4;
3669 }
3670 count += plt_count;
3671 }
3672 }
3673
3674 done:
3675 free (syms);
3676 return count;
3677 }
3678 \f
3679 /* The following functions are specific to the ELF linker, while
3680 functions above are used generally. Those named ppc64_elf_* are
3681 called by the main ELF linker code. They appear in this file more
3682 or less in the order in which they are called. eg.
3683 ppc64_elf_check_relocs is called early in the link process,
3684 ppc64_elf_finish_dynamic_sections is one of the last functions
3685 called.
3686
3687 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3688 functions have both a function code symbol and a function descriptor
3689 symbol. A call to foo in a relocatable object file looks like:
3690
3691 . .text
3692 . x:
3693 . bl .foo
3694 . nop
3695
3696 The function definition in another object file might be:
3697
3698 . .section .opd
3699 . foo: .quad .foo
3700 . .quad .TOC.@tocbase
3701 . .quad 0
3702 .
3703 . .text
3704 . .foo: blr
3705
3706 When the linker resolves the call during a static link, the branch
3707 unsurprisingly just goes to .foo and the .opd information is unused.
3708 If the function definition is in a shared library, things are a little
3709 different: The call goes via a plt call stub, the opd information gets
3710 copied to the plt, and the linker patches the nop.
3711
3712 . x:
3713 . bl .foo_stub
3714 . ld 2,40(1)
3715 .
3716 .
3717 . .foo_stub:
3718 . std 2,40(1) # in practice, the call stub
3719 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3720 . addi 11,11,Lfoo@toc@l # this is the general idea
3721 . ld 12,0(11)
3722 . ld 2,8(11)
3723 . mtctr 12
3724 . ld 11,16(11)
3725 . bctr
3726 .
3727 . .section .plt
3728 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3729
3730 The "reloc ()" notation is supposed to indicate that the linker emits
3731 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3732 copying.
3733
3734 What are the difficulties here? Well, firstly, the relocations
3735 examined by the linker in check_relocs are against the function code
3736 sym .foo, while the dynamic relocation in the plt is emitted against
3737 the function descriptor symbol, foo. Somewhere along the line, we need
3738 to carefully copy dynamic link information from one symbol to the other.
3739 Secondly, the generic part of the elf linker will make .foo a dynamic
3740 symbol as is normal for most other backends. We need foo dynamic
3741 instead, at least for an application final link. However, when
3742 creating a shared library containing foo, we need to have both symbols
3743 dynamic so that references to .foo are satisfied during the early
3744 stages of linking. Otherwise the linker might decide to pull in a
3745 definition from some other object, eg. a static library.
3746
3747 Update: As of August 2004, we support a new convention. Function
3748 calls may use the function descriptor symbol, ie. "bl foo". This
3749 behaves exactly as "bl .foo". */
3750
3751 /* Of those relocs that might be copied as dynamic relocs, this function
3752 selects those that must be copied when linking a shared library,
3753 even when the symbol is local. */
3754
3755 static int
3756 must_be_dyn_reloc (struct bfd_link_info *info,
3757 enum elf_ppc64_reloc_type r_type)
3758 {
3759 switch (r_type)
3760 {
3761 default:
3762 return 1;
3763
3764 case R_PPC64_REL32:
3765 case R_PPC64_REL64:
3766 case R_PPC64_REL30:
3767 return 0;
3768
3769 case R_PPC64_TPREL16:
3770 case R_PPC64_TPREL16_LO:
3771 case R_PPC64_TPREL16_HI:
3772 case R_PPC64_TPREL16_HA:
3773 case R_PPC64_TPREL16_DS:
3774 case R_PPC64_TPREL16_LO_DS:
3775 case R_PPC64_TPREL16_HIGH:
3776 case R_PPC64_TPREL16_HIGHA:
3777 case R_PPC64_TPREL16_HIGHER:
3778 case R_PPC64_TPREL16_HIGHERA:
3779 case R_PPC64_TPREL16_HIGHEST:
3780 case R_PPC64_TPREL16_HIGHESTA:
3781 case R_PPC64_TPREL64:
3782 return !bfd_link_executable (info);
3783 }
3784 }
3785
3786 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3787 copying dynamic variables from a shared lib into an app's dynbss
3788 section, and instead use a dynamic relocation to point into the
3789 shared lib. With code that gcc generates, it's vital that this be
3790 enabled; In the PowerPC64 ABI, the address of a function is actually
3791 the address of a function descriptor, which resides in the .opd
3792 section. gcc uses the descriptor directly rather than going via the
3793 GOT as some other ABI's do, which means that initialized function
3794 pointers must reference the descriptor. Thus, a function pointer
3795 initialized to the address of a function in a shared library will
3796 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3797 redefines the function descriptor symbol to point to the copy. This
3798 presents a problem as a plt entry for that function is also
3799 initialized from the function descriptor symbol and the copy reloc
3800 may not be initialized first. */
3801 #define ELIMINATE_COPY_RELOCS 1
3802
3803 /* Section name for stubs is the associated section name plus this
3804 string. */
3805 #define STUB_SUFFIX ".stub"
3806
3807 /* Linker stubs.
3808 ppc_stub_long_branch:
3809 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3810 destination, but a 24 bit branch in a stub section will reach.
3811 . b dest
3812
3813 ppc_stub_plt_branch:
3814 Similar to the above, but a 24 bit branch in the stub section won't
3815 reach its destination.
3816 . addis %r11,%r2,xxx@toc@ha
3817 . ld %r12,xxx@toc@l(%r11)
3818 . mtctr %r12
3819 . bctr
3820
3821 ppc_stub_plt_call:
3822 Used to call a function in a shared library. If it so happens that
3823 the plt entry referenced crosses a 64k boundary, then an extra
3824 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3825 . std %r2,40(%r1)
3826 . addis %r11,%r2,xxx@toc@ha
3827 . ld %r12,xxx+0@toc@l(%r11)
3828 . mtctr %r12
3829 . ld %r2,xxx+8@toc@l(%r11)
3830 . ld %r11,xxx+16@toc@l(%r11)
3831 . bctr
3832
3833 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3834 code to adjust the value and save r2 to support multiple toc sections.
3835 A ppc_stub_long_branch with an r2 offset looks like:
3836 . std %r2,40(%r1)
3837 . addis %r2,%r2,off@ha
3838 . addi %r2,%r2,off@l
3839 . b dest
3840
3841 A ppc_stub_plt_branch with an r2 offset looks like:
3842 . std %r2,40(%r1)
3843 . addis %r11,%r2,xxx@toc@ha
3844 . ld %r12,xxx@toc@l(%r11)
3845 . addis %r2,%r2,off@ha
3846 . addi %r2,%r2,off@l
3847 . mtctr %r12
3848 . bctr
3849
3850 In cases where the "addis" instruction would add zero, the "addis" is
3851 omitted and following instructions modified slightly in some cases.
3852 */
3853
3854 enum ppc_stub_type {
3855 ppc_stub_none,
3856 ppc_stub_long_branch,
3857 ppc_stub_long_branch_r2off,
3858 ppc_stub_plt_branch,
3859 ppc_stub_plt_branch_r2off,
3860 ppc_stub_plt_call,
3861 ppc_stub_plt_call_r2save,
3862 ppc_stub_global_entry,
3863 ppc_stub_save_res
3864 };
3865
3866 /* Information on stub grouping. */
3867 struct map_stub
3868 {
3869 /* The stub section. */
3870 asection *stub_sec;
3871 /* This is the section to which stubs in the group will be attached. */
3872 asection *link_sec;
3873 /* Next group. */
3874 struct map_stub *next;
3875 /* Whether to emit a copy of register save/restore functions in this
3876 group. */
3877 int needs_save_res;
3878 };
3879
3880 struct ppc_stub_hash_entry {
3881
3882 /* Base hash table entry structure. */
3883 struct bfd_hash_entry root;
3884
3885 enum ppc_stub_type stub_type;
3886
3887 /* Group information. */
3888 struct map_stub *group;
3889
3890 /* Offset within stub_sec of the beginning of this stub. */
3891 bfd_vma stub_offset;
3892
3893 /* Given the symbol's value and its section we can determine its final
3894 value when building the stubs (so the stub knows where to jump. */
3895 bfd_vma target_value;
3896 asection *target_section;
3897
3898 /* The symbol table entry, if any, that this was derived from. */
3899 struct ppc_link_hash_entry *h;
3900 struct plt_entry *plt_ent;
3901
3902 /* Symbol st_other. */
3903 unsigned char other;
3904 };
3905
3906 struct ppc_branch_hash_entry {
3907
3908 /* Base hash table entry structure. */
3909 struct bfd_hash_entry root;
3910
3911 /* Offset within branch lookup table. */
3912 unsigned int offset;
3913
3914 /* Generation marker. */
3915 unsigned int iter;
3916 };
3917
3918 /* Used to track dynamic relocations for local symbols. */
3919 struct ppc_dyn_relocs
3920 {
3921 struct ppc_dyn_relocs *next;
3922
3923 /* The input section of the reloc. */
3924 asection *sec;
3925
3926 /* Total number of relocs copied for the input section. */
3927 unsigned int count : 31;
3928
3929 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3930 unsigned int ifunc : 1;
3931 };
3932
3933 struct ppc_link_hash_entry
3934 {
3935 struct elf_link_hash_entry elf;
3936
3937 union {
3938 /* A pointer to the most recently used stub hash entry against this
3939 symbol. */
3940 struct ppc_stub_hash_entry *stub_cache;
3941
3942 /* A pointer to the next symbol starting with a '.' */
3943 struct ppc_link_hash_entry *next_dot_sym;
3944 } u;
3945
3946 /* Track dynamic relocs copied for this symbol. */
3947 struct elf_dyn_relocs *dyn_relocs;
3948
3949 /* Link between function code and descriptor symbols. */
3950 struct ppc_link_hash_entry *oh;
3951
3952 /* Flag function code and descriptor symbols. */
3953 unsigned int is_func:1;
3954 unsigned int is_func_descriptor:1;
3955 unsigned int fake:1;
3956
3957 /* Whether global opd/toc sym has been adjusted or not.
3958 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3959 should be set for all globals defined in any opd/toc section. */
3960 unsigned int adjust_done:1;
3961
3962 /* Set if we twiddled this symbol to weak at some stage. */
3963 unsigned int was_undefined:1;
3964
3965 /* Set if this is an out-of-line register save/restore function,
3966 with non-standard calling convention. */
3967 unsigned int save_res:1;
3968
3969 /* Contexts in which symbol is used in the GOT (or TOC).
3970 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3971 corresponding relocs are encountered during check_relocs.
3972 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3973 indicate the corresponding GOT entry type is not needed.
3974 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3975 a TPREL one. We use a separate flag rather than setting TPREL
3976 just for convenience in distinguishing the two cases. */
3977 #define TLS_GD 1 /* GD reloc. */
3978 #define TLS_LD 2 /* LD reloc. */
3979 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3980 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3981 #define TLS_TLS 16 /* Any TLS reloc. */
3982 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3983 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3984 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3985 unsigned char tls_mask;
3986 };
3987
3988 /* ppc64 ELF linker hash table. */
3989
3990 struct ppc_link_hash_table
3991 {
3992 struct elf_link_hash_table elf;
3993
3994 /* The stub hash table. */
3995 struct bfd_hash_table stub_hash_table;
3996
3997 /* Another hash table for plt_branch stubs. */
3998 struct bfd_hash_table branch_hash_table;
3999
4000 /* Hash table for function prologue tocsave. */
4001 htab_t tocsave_htab;
4002
4003 /* Various options and other info passed from the linker. */
4004 struct ppc64_elf_params *params;
4005
4006 /* The size of sec_info below. */
4007 unsigned int sec_info_arr_size;
4008
4009 /* Per-section array of extra section info. Done this way rather
4010 than as part of ppc64_elf_section_data so we have the info for
4011 non-ppc64 sections. */
4012 struct
4013 {
4014 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4015 bfd_vma toc_off;
4016
4017 union
4018 {
4019 /* The section group that this section belongs to. */
4020 struct map_stub *group;
4021 /* A temp section list pointer. */
4022 asection *list;
4023 } u;
4024 } *sec_info;
4025
4026 /* Linked list of groups. */
4027 struct map_stub *group;
4028
4029 /* Temp used when calculating TOC pointers. */
4030 bfd_vma toc_curr;
4031 bfd *toc_bfd;
4032 asection *toc_first_sec;
4033
4034 /* Used when adding symbols. */
4035 struct ppc_link_hash_entry *dot_syms;
4036
4037 /* Shortcuts to get to dynamic linker sections. */
4038 asection *dynbss;
4039 asection *relbss;
4040 asection *glink;
4041 asection *sfpr;
4042 asection *brlt;
4043 asection *relbrlt;
4044 asection *glink_eh_frame;
4045
4046 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4047 struct ppc_link_hash_entry *tls_get_addr;
4048 struct ppc_link_hash_entry *tls_get_addr_fd;
4049
4050 /* The size of reliplt used by got entry relocs. */
4051 bfd_size_type got_reli_size;
4052
4053 /* Statistics. */
4054 unsigned long stub_count[ppc_stub_global_entry];
4055
4056 /* Number of stubs against global syms. */
4057 unsigned long stub_globals;
4058
4059 /* Set if we're linking code with function descriptors. */
4060 unsigned int opd_abi:1;
4061
4062 /* Support for multiple toc sections. */
4063 unsigned int do_multi_toc:1;
4064 unsigned int multi_toc_needed:1;
4065 unsigned int second_toc_pass:1;
4066 unsigned int do_toc_opt:1;
4067
4068 /* Set on error. */
4069 unsigned int stub_error:1;
4070
4071 /* Temp used by ppc64_elf_before_check_relocs. */
4072 unsigned int twiddled_syms:1;
4073
4074 /* Incremented every time we size stubs. */
4075 unsigned int stub_iteration;
4076
4077 /* Small local sym cache. */
4078 struct sym_cache sym_cache;
4079 };
4080
4081 /* Rename some of the generic section flags to better document how they
4082 are used here. */
4083
4084 /* Nonzero if this section has TLS related relocations. */
4085 #define has_tls_reloc sec_flg0
4086
4087 /* Nonzero if this section has a call to __tls_get_addr. */
4088 #define has_tls_get_addr_call sec_flg1
4089
4090 /* Nonzero if this section has any toc or got relocs. */
4091 #define has_toc_reloc sec_flg2
4092
4093 /* Nonzero if this section has a call to another section that uses
4094 the toc or got. */
4095 #define makes_toc_func_call sec_flg3
4096
4097 /* Recursion protection when determining above flag. */
4098 #define call_check_in_progress sec_flg4
4099 #define call_check_done sec_flg5
4100
4101 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4102
4103 #define ppc_hash_table(p) \
4104 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4105 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4106
4107 #define ppc_stub_hash_lookup(table, string, create, copy) \
4108 ((struct ppc_stub_hash_entry *) \
4109 bfd_hash_lookup ((table), (string), (create), (copy)))
4110
4111 #define ppc_branch_hash_lookup(table, string, create, copy) \
4112 ((struct ppc_branch_hash_entry *) \
4113 bfd_hash_lookup ((table), (string), (create), (copy)))
4114
4115 /* Create an entry in the stub hash table. */
4116
4117 static struct bfd_hash_entry *
4118 stub_hash_newfunc (struct bfd_hash_entry *entry,
4119 struct bfd_hash_table *table,
4120 const char *string)
4121 {
4122 /* Allocate the structure if it has not already been allocated by a
4123 subclass. */
4124 if (entry == NULL)
4125 {
4126 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4127 if (entry == NULL)
4128 return entry;
4129 }
4130
4131 /* Call the allocation method of the superclass. */
4132 entry = bfd_hash_newfunc (entry, table, string);
4133 if (entry != NULL)
4134 {
4135 struct ppc_stub_hash_entry *eh;
4136
4137 /* Initialize the local fields. */
4138 eh = (struct ppc_stub_hash_entry *) entry;
4139 eh->stub_type = ppc_stub_none;
4140 eh->group = NULL;
4141 eh->stub_offset = 0;
4142 eh->target_value = 0;
4143 eh->target_section = NULL;
4144 eh->h = NULL;
4145 eh->plt_ent = NULL;
4146 eh->other = 0;
4147 }
4148
4149 return entry;
4150 }
4151
4152 /* Create an entry in the branch hash table. */
4153
4154 static struct bfd_hash_entry *
4155 branch_hash_newfunc (struct bfd_hash_entry *entry,
4156 struct bfd_hash_table *table,
4157 const char *string)
4158 {
4159 /* Allocate the structure if it has not already been allocated by a
4160 subclass. */
4161 if (entry == NULL)
4162 {
4163 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4164 if (entry == NULL)
4165 return entry;
4166 }
4167
4168 /* Call the allocation method of the superclass. */
4169 entry = bfd_hash_newfunc (entry, table, string);
4170 if (entry != NULL)
4171 {
4172 struct ppc_branch_hash_entry *eh;
4173
4174 /* Initialize the local fields. */
4175 eh = (struct ppc_branch_hash_entry *) entry;
4176 eh->offset = 0;
4177 eh->iter = 0;
4178 }
4179
4180 return entry;
4181 }
4182
4183 /* Create an entry in a ppc64 ELF linker hash table. */
4184
4185 static struct bfd_hash_entry *
4186 link_hash_newfunc (struct bfd_hash_entry *entry,
4187 struct bfd_hash_table *table,
4188 const char *string)
4189 {
4190 /* Allocate the structure if it has not already been allocated by a
4191 subclass. */
4192 if (entry == NULL)
4193 {
4194 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4195 if (entry == NULL)
4196 return entry;
4197 }
4198
4199 /* Call the allocation method of the superclass. */
4200 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4201 if (entry != NULL)
4202 {
4203 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4204
4205 memset (&eh->u.stub_cache, 0,
4206 (sizeof (struct ppc_link_hash_entry)
4207 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4208
4209 /* When making function calls, old ABI code references function entry
4210 points (dot symbols), while new ABI code references the function
4211 descriptor symbol. We need to make any combination of reference and
4212 definition work together, without breaking archive linking.
4213
4214 For a defined function "foo" and an undefined call to "bar":
4215 An old object defines "foo" and ".foo", references ".bar" (possibly
4216 "bar" too).
4217 A new object defines "foo" and references "bar".
4218
4219 A new object thus has no problem with its undefined symbols being
4220 satisfied by definitions in an old object. On the other hand, the
4221 old object won't have ".bar" satisfied by a new object.
4222
4223 Keep a list of newly added dot-symbols. */
4224
4225 if (string[0] == '.')
4226 {
4227 struct ppc_link_hash_table *htab;
4228
4229 htab = (struct ppc_link_hash_table *) table;
4230 eh->u.next_dot_sym = htab->dot_syms;
4231 htab->dot_syms = eh;
4232 }
4233 }
4234
4235 return entry;
4236 }
4237
4238 struct tocsave_entry {
4239 asection *sec;
4240 bfd_vma offset;
4241 };
4242
4243 static hashval_t
4244 tocsave_htab_hash (const void *p)
4245 {
4246 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4247 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4248 }
4249
4250 static int
4251 tocsave_htab_eq (const void *p1, const void *p2)
4252 {
4253 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4254 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4255 return e1->sec == e2->sec && e1->offset == e2->offset;
4256 }
4257
4258 /* Destroy a ppc64 ELF linker hash table. */
4259
4260 static void
4261 ppc64_elf_link_hash_table_free (bfd *obfd)
4262 {
4263 struct ppc_link_hash_table *htab;
4264
4265 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4266 if (htab->tocsave_htab)
4267 htab_delete (htab->tocsave_htab);
4268 bfd_hash_table_free (&htab->branch_hash_table);
4269 bfd_hash_table_free (&htab->stub_hash_table);
4270 _bfd_elf_link_hash_table_free (obfd);
4271 }
4272
4273 /* Create a ppc64 ELF linker hash table. */
4274
4275 static struct bfd_link_hash_table *
4276 ppc64_elf_link_hash_table_create (bfd *abfd)
4277 {
4278 struct ppc_link_hash_table *htab;
4279 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4280
4281 htab = bfd_zmalloc (amt);
4282 if (htab == NULL)
4283 return NULL;
4284
4285 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4286 sizeof (struct ppc_link_hash_entry),
4287 PPC64_ELF_DATA))
4288 {
4289 free (htab);
4290 return NULL;
4291 }
4292
4293 /* Init the stub hash table too. */
4294 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4295 sizeof (struct ppc_stub_hash_entry)))
4296 {
4297 _bfd_elf_link_hash_table_free (abfd);
4298 return NULL;
4299 }
4300
4301 /* And the branch hash table. */
4302 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4303 sizeof (struct ppc_branch_hash_entry)))
4304 {
4305 bfd_hash_table_free (&htab->stub_hash_table);
4306 _bfd_elf_link_hash_table_free (abfd);
4307 return NULL;
4308 }
4309
4310 htab->tocsave_htab = htab_try_create (1024,
4311 tocsave_htab_hash,
4312 tocsave_htab_eq,
4313 NULL);
4314 if (htab->tocsave_htab == NULL)
4315 {
4316 ppc64_elf_link_hash_table_free (abfd);
4317 return NULL;
4318 }
4319 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4320
4321 /* Initializing two fields of the union is just cosmetic. We really
4322 only care about glist, but when compiled on a 32-bit host the
4323 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4324 debugger inspection of these fields look nicer. */
4325 htab->elf.init_got_refcount.refcount = 0;
4326 htab->elf.init_got_refcount.glist = NULL;
4327 htab->elf.init_plt_refcount.refcount = 0;
4328 htab->elf.init_plt_refcount.glist = NULL;
4329 htab->elf.init_got_offset.offset = 0;
4330 htab->elf.init_got_offset.glist = NULL;
4331 htab->elf.init_plt_offset.offset = 0;
4332 htab->elf.init_plt_offset.glist = NULL;
4333
4334 return &htab->elf.root;
4335 }
4336
4337 /* Create sections for linker generated code. */
4338
4339 static bfd_boolean
4340 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4341 {
4342 struct ppc_link_hash_table *htab;
4343 flagword flags;
4344
4345 htab = ppc_hash_table (info);
4346
4347 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4348 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4349 if (htab->params->save_restore_funcs)
4350 {
4351 /* Create .sfpr for code to save and restore fp regs. */
4352 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4353 flags);
4354 if (htab->sfpr == NULL
4355 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4356 return FALSE;
4357 }
4358
4359 if (bfd_link_relocatable (info))
4360 return TRUE;
4361
4362 /* Create .glink for lazy dynamic linking support. */
4363 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4364 flags);
4365 if (htab->glink == NULL
4366 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4367 return FALSE;
4368
4369 if (!info->no_ld_generated_unwind_info)
4370 {
4371 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4372 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4373 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4374 ".eh_frame",
4375 flags);
4376 if (htab->glink_eh_frame == NULL
4377 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4378 return FALSE;
4379 }
4380
4381 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4382 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4383 if (htab->elf.iplt == NULL
4384 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4385 return FALSE;
4386
4387 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4388 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4389 htab->elf.irelplt
4390 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4391 if (htab->elf.irelplt == NULL
4392 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4393 return FALSE;
4394
4395 /* Create branch lookup table for plt_branch stubs. */
4396 flags = (SEC_ALLOC | SEC_LOAD
4397 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4398 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4399 flags);
4400 if (htab->brlt == NULL
4401 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4402 return FALSE;
4403
4404 if (!bfd_link_pic (info))
4405 return TRUE;
4406
4407 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4408 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4409 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4410 ".rela.branch_lt",
4411 flags);
4412 if (htab->relbrlt == NULL
4413 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4414 return FALSE;
4415
4416 return TRUE;
4417 }
4418
4419 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4420
4421 bfd_boolean
4422 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4423 struct ppc64_elf_params *params)
4424 {
4425 struct ppc_link_hash_table *htab;
4426
4427 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4428
4429 /* Always hook our dynamic sections into the first bfd, which is the
4430 linker created stub bfd. This ensures that the GOT header is at
4431 the start of the output TOC section. */
4432 htab = ppc_hash_table (info);
4433 htab->elf.dynobj = params->stub_bfd;
4434 htab->params = params;
4435
4436 return create_linkage_sections (htab->elf.dynobj, info);
4437 }
4438
4439 /* Build a name for an entry in the stub hash table. */
4440
4441 static char *
4442 ppc_stub_name (const asection *input_section,
4443 const asection *sym_sec,
4444 const struct ppc_link_hash_entry *h,
4445 const Elf_Internal_Rela *rel)
4446 {
4447 char *stub_name;
4448 ssize_t len;
4449
4450 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4451 offsets from a sym as a branch target? In fact, we could
4452 probably assume the addend is always zero. */
4453 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4454
4455 if (h)
4456 {
4457 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4458 stub_name = bfd_malloc (len);
4459 if (stub_name == NULL)
4460 return stub_name;
4461
4462 len = sprintf (stub_name, "%08x.%s+%x",
4463 input_section->id & 0xffffffff,
4464 h->elf.root.root.string,
4465 (int) rel->r_addend & 0xffffffff);
4466 }
4467 else
4468 {
4469 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4470 stub_name = bfd_malloc (len);
4471 if (stub_name == NULL)
4472 return stub_name;
4473
4474 len = sprintf (stub_name, "%08x.%x:%x+%x",
4475 input_section->id & 0xffffffff,
4476 sym_sec->id & 0xffffffff,
4477 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4478 (int) rel->r_addend & 0xffffffff);
4479 }
4480 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4481 stub_name[len - 2] = 0;
4482 return stub_name;
4483 }
4484
4485 /* Look up an entry in the stub hash. Stub entries are cached because
4486 creating the stub name takes a bit of time. */
4487
4488 static struct ppc_stub_hash_entry *
4489 ppc_get_stub_entry (const asection *input_section,
4490 const asection *sym_sec,
4491 struct ppc_link_hash_entry *h,
4492 const Elf_Internal_Rela *rel,
4493 struct ppc_link_hash_table *htab)
4494 {
4495 struct ppc_stub_hash_entry *stub_entry;
4496 struct map_stub *group;
4497
4498 /* If this input section is part of a group of sections sharing one
4499 stub section, then use the id of the first section in the group.
4500 Stub names need to include a section id, as there may well be
4501 more than one stub used to reach say, printf, and we need to
4502 distinguish between them. */
4503 group = htab->sec_info[input_section->id].u.group;
4504
4505 if (h != NULL && h->u.stub_cache != NULL
4506 && h->u.stub_cache->h == h
4507 && h->u.stub_cache->group == group)
4508 {
4509 stub_entry = h->u.stub_cache;
4510 }
4511 else
4512 {
4513 char *stub_name;
4514
4515 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4516 if (stub_name == NULL)
4517 return NULL;
4518
4519 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4520 stub_name, FALSE, FALSE);
4521 if (h != NULL)
4522 h->u.stub_cache = stub_entry;
4523
4524 free (stub_name);
4525 }
4526
4527 return stub_entry;
4528 }
4529
4530 /* Add a new stub entry to the stub hash. Not all fields of the new
4531 stub entry are initialised. */
4532
4533 static struct ppc_stub_hash_entry *
4534 ppc_add_stub (const char *stub_name,
4535 asection *section,
4536 struct bfd_link_info *info)
4537 {
4538 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4539 struct map_stub *group;
4540 asection *link_sec;
4541 asection *stub_sec;
4542 struct ppc_stub_hash_entry *stub_entry;
4543
4544 group = htab->sec_info[section->id].u.group;
4545 link_sec = group->link_sec;
4546 stub_sec = group->stub_sec;
4547 if (stub_sec == NULL)
4548 {
4549 size_t namelen;
4550 bfd_size_type len;
4551 char *s_name;
4552
4553 namelen = strlen (link_sec->name);
4554 len = namelen + sizeof (STUB_SUFFIX);
4555 s_name = bfd_alloc (htab->params->stub_bfd, len);
4556 if (s_name == NULL)
4557 return NULL;
4558
4559 memcpy (s_name, link_sec->name, namelen);
4560 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4561 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4562 if (stub_sec == NULL)
4563 return NULL;
4564 group->stub_sec = stub_sec;
4565 }
4566
4567 /* Enter this entry into the linker stub hash table. */
4568 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4569 TRUE, FALSE);
4570 if (stub_entry == NULL)
4571 {
4572 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4573 section->owner, stub_name);
4574 return NULL;
4575 }
4576
4577 stub_entry->group = group;
4578 stub_entry->stub_offset = 0;
4579 return stub_entry;
4580 }
4581
4582 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4583 not already done. */
4584
4585 static bfd_boolean
4586 create_got_section (bfd *abfd, struct bfd_link_info *info)
4587 {
4588 asection *got, *relgot;
4589 flagword flags;
4590 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4591
4592 if (!is_ppc64_elf (abfd))
4593 return FALSE;
4594 if (htab == NULL)
4595 return FALSE;
4596
4597 if (!htab->elf.sgot
4598 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4599 return FALSE;
4600
4601 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4602 | SEC_LINKER_CREATED);
4603
4604 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4605 if (!got
4606 || !bfd_set_section_alignment (abfd, got, 3))
4607 return FALSE;
4608
4609 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4610 flags | SEC_READONLY);
4611 if (!relgot
4612 || ! bfd_set_section_alignment (abfd, relgot, 3))
4613 return FALSE;
4614
4615 ppc64_elf_tdata (abfd)->got = got;
4616 ppc64_elf_tdata (abfd)->relgot = relgot;
4617 return TRUE;
4618 }
4619
4620 /* Create the dynamic sections, and set up shortcuts. */
4621
4622 static bfd_boolean
4623 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4624 {
4625 struct ppc_link_hash_table *htab;
4626
4627 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4628 return FALSE;
4629
4630 htab = ppc_hash_table (info);
4631 if (htab == NULL)
4632 return FALSE;
4633
4634 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4635 if (!bfd_link_pic (info))
4636 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4637
4638 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4639 || (!bfd_link_pic (info) && !htab->relbss))
4640 abort ();
4641
4642 return TRUE;
4643 }
4644
4645 /* Follow indirect and warning symbol links. */
4646
4647 static inline struct bfd_link_hash_entry *
4648 follow_link (struct bfd_link_hash_entry *h)
4649 {
4650 while (h->type == bfd_link_hash_indirect
4651 || h->type == bfd_link_hash_warning)
4652 h = h->u.i.link;
4653 return h;
4654 }
4655
4656 static inline struct elf_link_hash_entry *
4657 elf_follow_link (struct elf_link_hash_entry *h)
4658 {
4659 return (struct elf_link_hash_entry *) follow_link (&h->root);
4660 }
4661
4662 static inline struct ppc_link_hash_entry *
4663 ppc_follow_link (struct ppc_link_hash_entry *h)
4664 {
4665 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4666 }
4667
4668 /* Merge PLT info on FROM with that on TO. */
4669
4670 static void
4671 move_plt_plist (struct ppc_link_hash_entry *from,
4672 struct ppc_link_hash_entry *to)
4673 {
4674 if (from->elf.plt.plist != NULL)
4675 {
4676 if (to->elf.plt.plist != NULL)
4677 {
4678 struct plt_entry **entp;
4679 struct plt_entry *ent;
4680
4681 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4682 {
4683 struct plt_entry *dent;
4684
4685 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4686 if (dent->addend == ent->addend)
4687 {
4688 dent->plt.refcount += ent->plt.refcount;
4689 *entp = ent->next;
4690 break;
4691 }
4692 if (dent == NULL)
4693 entp = &ent->next;
4694 }
4695 *entp = to->elf.plt.plist;
4696 }
4697
4698 to->elf.plt.plist = from->elf.plt.plist;
4699 from->elf.plt.plist = NULL;
4700 }
4701 }
4702
4703 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4704
4705 static void
4706 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4707 struct elf_link_hash_entry *dir,
4708 struct elf_link_hash_entry *ind)
4709 {
4710 struct ppc_link_hash_entry *edir, *eind;
4711
4712 edir = (struct ppc_link_hash_entry *) dir;
4713 eind = (struct ppc_link_hash_entry *) ind;
4714
4715 edir->is_func |= eind->is_func;
4716 edir->is_func_descriptor |= eind->is_func_descriptor;
4717 edir->tls_mask |= eind->tls_mask;
4718 if (eind->oh != NULL)
4719 edir->oh = ppc_follow_link (eind->oh);
4720
4721 /* If called to transfer flags for a weakdef during processing
4722 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4723 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4724 if (!(ELIMINATE_COPY_RELOCS
4725 && eind->elf.root.type != bfd_link_hash_indirect
4726 && edir->elf.dynamic_adjusted))
4727 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4728
4729 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4730 edir->elf.ref_regular |= eind->elf.ref_regular;
4731 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4732 edir->elf.needs_plt |= eind->elf.needs_plt;
4733 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4734
4735 /* Copy over any dynamic relocs we may have on the indirect sym. */
4736 if (eind->dyn_relocs != NULL)
4737 {
4738 if (edir->dyn_relocs != NULL)
4739 {
4740 struct elf_dyn_relocs **pp;
4741 struct elf_dyn_relocs *p;
4742
4743 /* Add reloc counts against the indirect sym to the direct sym
4744 list. Merge any entries against the same section. */
4745 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4746 {
4747 struct elf_dyn_relocs *q;
4748
4749 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4750 if (q->sec == p->sec)
4751 {
4752 q->pc_count += p->pc_count;
4753 q->count += p->count;
4754 *pp = p->next;
4755 break;
4756 }
4757 if (q == NULL)
4758 pp = &p->next;
4759 }
4760 *pp = edir->dyn_relocs;
4761 }
4762
4763 edir->dyn_relocs = eind->dyn_relocs;
4764 eind->dyn_relocs = NULL;
4765 }
4766
4767 /* If we were called to copy over info for a weak sym, that's all.
4768 You might think dyn_relocs need not be copied over; After all,
4769 both syms will be dynamic or both non-dynamic so we're just
4770 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4771 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4772 dyn_relocs in read-only sections, and it does so on what is the
4773 DIR sym here. */
4774 if (eind->elf.root.type != bfd_link_hash_indirect)
4775 return;
4776
4777 /* Copy over got entries that we may have already seen to the
4778 symbol which just became indirect. */
4779 if (eind->elf.got.glist != NULL)
4780 {
4781 if (edir->elf.got.glist != NULL)
4782 {
4783 struct got_entry **entp;
4784 struct got_entry *ent;
4785
4786 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4787 {
4788 struct got_entry *dent;
4789
4790 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4791 if (dent->addend == ent->addend
4792 && dent->owner == ent->owner
4793 && dent->tls_type == ent->tls_type)
4794 {
4795 dent->got.refcount += ent->got.refcount;
4796 *entp = ent->next;
4797 break;
4798 }
4799 if (dent == NULL)
4800 entp = &ent->next;
4801 }
4802 *entp = edir->elf.got.glist;
4803 }
4804
4805 edir->elf.got.glist = eind->elf.got.glist;
4806 eind->elf.got.glist = NULL;
4807 }
4808
4809 /* And plt entries. */
4810 move_plt_plist (eind, edir);
4811
4812 if (eind->elf.dynindx != -1)
4813 {
4814 if (edir->elf.dynindx != -1)
4815 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4816 edir->elf.dynstr_index);
4817 edir->elf.dynindx = eind->elf.dynindx;
4818 edir->elf.dynstr_index = eind->elf.dynstr_index;
4819 eind->elf.dynindx = -1;
4820 eind->elf.dynstr_index = 0;
4821 }
4822 }
4823
4824 /* Find the function descriptor hash entry from the given function code
4825 hash entry FH. Link the entries via their OH fields. */
4826
4827 static struct ppc_link_hash_entry *
4828 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4829 {
4830 struct ppc_link_hash_entry *fdh = fh->oh;
4831
4832 if (fdh == NULL)
4833 {
4834 const char *fd_name = fh->elf.root.root.string + 1;
4835
4836 fdh = (struct ppc_link_hash_entry *)
4837 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4838 if (fdh == NULL)
4839 return fdh;
4840
4841 fdh->is_func_descriptor = 1;
4842 fdh->oh = fh;
4843 fh->is_func = 1;
4844 fh->oh = fdh;
4845 }
4846
4847 return ppc_follow_link (fdh);
4848 }
4849
4850 /* Make a fake function descriptor sym for the code sym FH. */
4851
4852 static struct ppc_link_hash_entry *
4853 make_fdh (struct bfd_link_info *info,
4854 struct ppc_link_hash_entry *fh)
4855 {
4856 bfd *abfd;
4857 asymbol *newsym;
4858 struct bfd_link_hash_entry *bh;
4859 struct ppc_link_hash_entry *fdh;
4860
4861 abfd = fh->elf.root.u.undef.abfd;
4862 newsym = bfd_make_empty_symbol (abfd);
4863 newsym->name = fh->elf.root.root.string + 1;
4864 newsym->section = bfd_und_section_ptr;
4865 newsym->value = 0;
4866 newsym->flags = BSF_WEAK;
4867
4868 bh = NULL;
4869 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4870 newsym->flags, newsym->section,
4871 newsym->value, NULL, FALSE, FALSE,
4872 &bh))
4873 return NULL;
4874
4875 fdh = (struct ppc_link_hash_entry *) bh;
4876 fdh->elf.non_elf = 0;
4877 fdh->fake = 1;
4878 fdh->is_func_descriptor = 1;
4879 fdh->oh = fh;
4880 fh->is_func = 1;
4881 fh->oh = fdh;
4882 return fdh;
4883 }
4884
4885 /* Fix function descriptor symbols defined in .opd sections to be
4886 function type. */
4887
4888 static bfd_boolean
4889 ppc64_elf_add_symbol_hook (bfd *ibfd,
4890 struct bfd_link_info *info,
4891 Elf_Internal_Sym *isym,
4892 const char **name,
4893 flagword *flags ATTRIBUTE_UNUSED,
4894 asection **sec,
4895 bfd_vma *value)
4896 {
4897 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4898 && (ibfd->flags & DYNAMIC) == 0
4899 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4900 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4901
4902 if (*sec != NULL
4903 && strcmp ((*sec)->name, ".opd") == 0)
4904 {
4905 asection *code_sec;
4906
4907 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4908 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4909 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4910
4911 /* If the symbol is a function defined in .opd, and the function
4912 code is in a discarded group, let it appear to be undefined. */
4913 if (!bfd_link_relocatable (info)
4914 && (*sec)->reloc_count != 0
4915 && opd_entry_value (*sec, *value, &code_sec, NULL,
4916 FALSE) != (bfd_vma) -1
4917 && discarded_section (code_sec))
4918 {
4919 *sec = bfd_und_section_ptr;
4920 isym->st_shndx = SHN_UNDEF;
4921 }
4922 }
4923 else if (*sec != NULL
4924 && strcmp ((*sec)->name, ".toc") == 0
4925 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4926 {
4927 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4928 if (htab != NULL)
4929 htab->params->object_in_toc = 1;
4930 }
4931
4932 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4933 {
4934 if (abiversion (ibfd) == 0)
4935 set_abiversion (ibfd, 2);
4936 else if (abiversion (ibfd) == 1)
4937 {
4938 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4939 " for ABI version 1\n"), name);
4940 bfd_set_error (bfd_error_bad_value);
4941 return FALSE;
4942 }
4943 }
4944
4945 return TRUE;
4946 }
4947
4948 /* Merge non-visibility st_other attributes: local entry point. */
4949
4950 static void
4951 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4952 const Elf_Internal_Sym *isym,
4953 bfd_boolean definition,
4954 bfd_boolean dynamic)
4955 {
4956 if (definition && !dynamic)
4957 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4958 | ELF_ST_VISIBILITY (h->other));
4959 }
4960
4961 /* This function makes an old ABI object reference to ".bar" cause the
4962 inclusion of a new ABI object archive that defines "bar".
4963 NAME is a symbol defined in an archive. Return a symbol in the hash
4964 table that might be satisfied by the archive symbols. */
4965
4966 static struct elf_link_hash_entry *
4967 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4968 struct bfd_link_info *info,
4969 const char *name)
4970 {
4971 struct elf_link_hash_entry *h;
4972 char *dot_name;
4973 size_t len;
4974
4975 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4976 if (h != NULL
4977 /* Don't return this sym if it is a fake function descriptor
4978 created by add_symbol_adjust. */
4979 && !(h->root.type == bfd_link_hash_undefweak
4980 && ((struct ppc_link_hash_entry *) h)->fake))
4981 return h;
4982
4983 if (name[0] == '.')
4984 return h;
4985
4986 len = strlen (name);
4987 dot_name = bfd_alloc (abfd, len + 2);
4988 if (dot_name == NULL)
4989 return (struct elf_link_hash_entry *) 0 - 1;
4990 dot_name[0] = '.';
4991 memcpy (dot_name + 1, name, len + 1);
4992 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4993 bfd_release (abfd, dot_name);
4994 return h;
4995 }
4996
4997 /* This function satisfies all old ABI object references to ".bar" if a
4998 new ABI object defines "bar". Well, at least, undefined dot symbols
4999 are made weak. This stops later archive searches from including an
5000 object if we already have a function descriptor definition. It also
5001 prevents the linker complaining about undefined symbols.
5002 We also check and correct mismatched symbol visibility here. The
5003 most restrictive visibility of the function descriptor and the
5004 function entry symbol is used. */
5005
5006 static bfd_boolean
5007 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5008 {
5009 struct ppc_link_hash_table *htab;
5010 struct ppc_link_hash_entry *fdh;
5011
5012 if (eh->elf.root.type == bfd_link_hash_indirect)
5013 return TRUE;
5014
5015 if (eh->elf.root.type == bfd_link_hash_warning)
5016 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5017
5018 if (eh->elf.root.root.string[0] != '.')
5019 abort ();
5020
5021 htab = ppc_hash_table (info);
5022 if (htab == NULL)
5023 return FALSE;
5024
5025 fdh = lookup_fdh (eh, htab);
5026 if (fdh == NULL)
5027 {
5028 if (!bfd_link_relocatable (info)
5029 && (eh->elf.root.type == bfd_link_hash_undefined
5030 || eh->elf.root.type == bfd_link_hash_undefweak)
5031 && eh->elf.ref_regular)
5032 {
5033 /* Make an undefweak function descriptor sym, which is enough to
5034 pull in an --as-needed shared lib, but won't cause link
5035 errors. Archives are handled elsewhere. */
5036 fdh = make_fdh (info, eh);
5037 if (fdh == NULL)
5038 return FALSE;
5039 fdh->elf.ref_regular = 1;
5040 }
5041 }
5042 else
5043 {
5044 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5045 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5046 if (entry_vis < descr_vis)
5047 fdh->elf.other += entry_vis - descr_vis;
5048 else if (entry_vis > descr_vis)
5049 eh->elf.other += descr_vis - entry_vis;
5050
5051 if ((fdh->elf.root.type == bfd_link_hash_defined
5052 || fdh->elf.root.type == bfd_link_hash_defweak)
5053 && eh->elf.root.type == bfd_link_hash_undefined)
5054 {
5055 eh->elf.root.type = bfd_link_hash_undefweak;
5056 eh->was_undefined = 1;
5057 htab->twiddled_syms = 1;
5058 }
5059 }
5060
5061 return TRUE;
5062 }
5063
5064 /* Set up opd section info and abiversion for IBFD, and process list
5065 of dot-symbols we made in link_hash_newfunc. */
5066
5067 static bfd_boolean
5068 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5069 {
5070 struct ppc_link_hash_table *htab;
5071 struct ppc_link_hash_entry **p, *eh;
5072 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5073
5074 if (opd != NULL && opd->size != 0)
5075 {
5076 if (abiversion (ibfd) == 0)
5077 set_abiversion (ibfd, 1);
5078 else if (abiversion (ibfd) == 2)
5079 {
5080 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5081 " version %d\n"),
5082 ibfd, abiversion (ibfd));
5083 bfd_set_error (bfd_error_bad_value);
5084 return FALSE;
5085 }
5086
5087 if ((ibfd->flags & DYNAMIC) == 0
5088 && (opd->flags & SEC_RELOC) != 0
5089 && opd->reloc_count != 0
5090 && !bfd_is_abs_section (opd->output_section))
5091 {
5092 /* Garbage collection needs some extra help with .opd sections.
5093 We don't want to necessarily keep everything referenced by
5094 relocs in .opd, as that would keep all functions. Instead,
5095 if we reference an .opd symbol (a function descriptor), we
5096 want to keep the function code symbol's section. This is
5097 easy for global symbols, but for local syms we need to keep
5098 information about the associated function section. */
5099 bfd_size_type amt;
5100 asection **opd_sym_map;
5101
5102 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5103 opd_sym_map = bfd_zalloc (ibfd, amt);
5104 if (opd_sym_map == NULL)
5105 return FALSE;
5106 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5107 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5108 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5109 }
5110 }
5111
5112 if (!is_ppc64_elf (info->output_bfd))
5113 return TRUE;
5114 htab = ppc_hash_table (info);
5115 if (htab == NULL)
5116 return FALSE;
5117
5118 /* For input files without an explicit abiversion in e_flags
5119 we should have flagged any with symbol st_other bits set
5120 as ELFv1 and above flagged those with .opd as ELFv2.
5121 Set the output abiversion if not yet set, and for any input
5122 still ambiguous, take its abiversion from the output.
5123 Differences in ABI are reported later. */
5124 if (abiversion (info->output_bfd) == 0)
5125 set_abiversion (info->output_bfd, abiversion (ibfd));
5126 else if (abiversion (ibfd) == 0)
5127 set_abiversion (ibfd, abiversion (info->output_bfd));
5128
5129 p = &htab->dot_syms;
5130 while ((eh = *p) != NULL)
5131 {
5132 *p = NULL;
5133 if (&eh->elf == htab->elf.hgot)
5134 ;
5135 else if (htab->elf.hgot == NULL
5136 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5137 htab->elf.hgot = &eh->elf;
5138 else if (!add_symbol_adjust (eh, info))
5139 return FALSE;
5140 p = &eh->u.next_dot_sym;
5141 }
5142
5143 /* Clear the list for non-ppc64 input files. */
5144 p = &htab->dot_syms;
5145 while ((eh = *p) != NULL)
5146 {
5147 *p = NULL;
5148 p = &eh->u.next_dot_sym;
5149 }
5150
5151 /* We need to fix the undefs list for any syms we have twiddled to
5152 undef_weak. */
5153 if (htab->twiddled_syms)
5154 {
5155 bfd_link_repair_undef_list (&htab->elf.root);
5156 htab->twiddled_syms = 0;
5157 }
5158 return TRUE;
5159 }
5160
5161 /* Undo hash table changes when an --as-needed input file is determined
5162 not to be needed. */
5163
5164 static bfd_boolean
5165 ppc64_elf_notice_as_needed (bfd *ibfd,
5166 struct bfd_link_info *info,
5167 enum notice_asneeded_action act)
5168 {
5169 if (act == notice_not_needed)
5170 {
5171 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5172
5173 if (htab == NULL)
5174 return FALSE;
5175
5176 htab->dot_syms = NULL;
5177 }
5178 return _bfd_elf_notice_as_needed (ibfd, info, act);
5179 }
5180
5181 /* If --just-symbols against a final linked binary, then assume we need
5182 toc adjusting stubs when calling functions defined there. */
5183
5184 static void
5185 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5186 {
5187 if ((sec->flags & SEC_CODE) != 0
5188 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5189 && is_ppc64_elf (sec->owner))
5190 {
5191 if (abiversion (sec->owner) >= 2
5192 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5193 sec->has_toc_reloc = 1;
5194 }
5195 _bfd_elf_link_just_syms (sec, info);
5196 }
5197
5198 static struct plt_entry **
5199 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5200 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5201 {
5202 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5203 struct plt_entry **local_plt;
5204 unsigned char *local_got_tls_masks;
5205
5206 if (local_got_ents == NULL)
5207 {
5208 bfd_size_type size = symtab_hdr->sh_info;
5209
5210 size *= (sizeof (*local_got_ents)
5211 + sizeof (*local_plt)
5212 + sizeof (*local_got_tls_masks));
5213 local_got_ents = bfd_zalloc (abfd, size);
5214 if (local_got_ents == NULL)
5215 return NULL;
5216 elf_local_got_ents (abfd) = local_got_ents;
5217 }
5218
5219 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5220 {
5221 struct got_entry *ent;
5222
5223 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5224 if (ent->addend == r_addend
5225 && ent->owner == abfd
5226 && ent->tls_type == tls_type)
5227 break;
5228 if (ent == NULL)
5229 {
5230 bfd_size_type amt = sizeof (*ent);
5231 ent = bfd_alloc (abfd, amt);
5232 if (ent == NULL)
5233 return FALSE;
5234 ent->next = local_got_ents[r_symndx];
5235 ent->addend = r_addend;
5236 ent->owner = abfd;
5237 ent->tls_type = tls_type;
5238 ent->is_indirect = FALSE;
5239 ent->got.refcount = 0;
5240 local_got_ents[r_symndx] = ent;
5241 }
5242 ent->got.refcount += 1;
5243 }
5244
5245 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5246 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5247 local_got_tls_masks[r_symndx] |= tls_type;
5248
5249 return local_plt + r_symndx;
5250 }
5251
5252 static bfd_boolean
5253 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5254 {
5255 struct plt_entry *ent;
5256
5257 for (ent = *plist; ent != NULL; ent = ent->next)
5258 if (ent->addend == addend)
5259 break;
5260 if (ent == NULL)
5261 {
5262 bfd_size_type amt = sizeof (*ent);
5263 ent = bfd_alloc (abfd, amt);
5264 if (ent == NULL)
5265 return FALSE;
5266 ent->next = *plist;
5267 ent->addend = addend;
5268 ent->plt.refcount = 0;
5269 *plist = ent;
5270 }
5271 ent->plt.refcount += 1;
5272 return TRUE;
5273 }
5274
5275 static bfd_boolean
5276 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5277 {
5278 return (r_type == R_PPC64_REL24
5279 || r_type == R_PPC64_REL14
5280 || r_type == R_PPC64_REL14_BRTAKEN
5281 || r_type == R_PPC64_REL14_BRNTAKEN
5282 || r_type == R_PPC64_ADDR24
5283 || r_type == R_PPC64_ADDR14
5284 || r_type == R_PPC64_ADDR14_BRTAKEN
5285 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5286 }
5287
5288 /* Look through the relocs for a section during the first phase, and
5289 calculate needed space in the global offset table, procedure
5290 linkage table, and dynamic reloc sections. */
5291
5292 static bfd_boolean
5293 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5294 asection *sec, const Elf_Internal_Rela *relocs)
5295 {
5296 struct ppc_link_hash_table *htab;
5297 Elf_Internal_Shdr *symtab_hdr;
5298 struct elf_link_hash_entry **sym_hashes;
5299 const Elf_Internal_Rela *rel;
5300 const Elf_Internal_Rela *rel_end;
5301 asection *sreloc;
5302 asection **opd_sym_map;
5303 struct elf_link_hash_entry *tga, *dottga;
5304
5305 if (bfd_link_relocatable (info))
5306 return TRUE;
5307
5308 /* Don't do anything special with non-loaded, non-alloced sections.
5309 In particular, any relocs in such sections should not affect GOT
5310 and PLT reference counting (ie. we don't allow them to create GOT
5311 or PLT entries), there's no possibility or desire to optimize TLS
5312 relocs, and there's not much point in propagating relocs to shared
5313 libs that the dynamic linker won't relocate. */
5314 if ((sec->flags & SEC_ALLOC) == 0)
5315 return TRUE;
5316
5317 BFD_ASSERT (is_ppc64_elf (abfd));
5318
5319 htab = ppc_hash_table (info);
5320 if (htab == NULL)
5321 return FALSE;
5322
5323 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5324 FALSE, FALSE, TRUE);
5325 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5326 FALSE, FALSE, TRUE);
5327 symtab_hdr = &elf_symtab_hdr (abfd);
5328 sym_hashes = elf_sym_hashes (abfd);
5329 sreloc = NULL;
5330 opd_sym_map = NULL;
5331 if (ppc64_elf_section_data (sec) != NULL
5332 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5333 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5334
5335 rel_end = relocs + sec->reloc_count;
5336 for (rel = relocs; rel < rel_end; rel++)
5337 {
5338 unsigned long r_symndx;
5339 struct elf_link_hash_entry *h;
5340 enum elf_ppc64_reloc_type r_type;
5341 int tls_type;
5342 struct _ppc64_elf_section_data *ppc64_sec;
5343 struct plt_entry **ifunc, **plt_list;
5344
5345 r_symndx = ELF64_R_SYM (rel->r_info);
5346 if (r_symndx < symtab_hdr->sh_info)
5347 h = NULL;
5348 else
5349 {
5350 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5351 h = elf_follow_link (h);
5352
5353 /* PR15323, ref flags aren't set for references in the same
5354 object. */
5355 h->root.non_ir_ref = 1;
5356
5357 if (h == htab->elf.hgot)
5358 sec->has_toc_reloc = 1;
5359 }
5360
5361 tls_type = 0;
5362 ifunc = NULL;
5363 if (h != NULL)
5364 {
5365 if (h->type == STT_GNU_IFUNC)
5366 {
5367 h->needs_plt = 1;
5368 ifunc = &h->plt.plist;
5369 }
5370 }
5371 else
5372 {
5373 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5374 abfd, r_symndx);
5375 if (isym == NULL)
5376 return FALSE;
5377
5378 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5379 {
5380 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5381 rel->r_addend, PLT_IFUNC);
5382 if (ifunc == NULL)
5383 return FALSE;
5384 }
5385 }
5386
5387 r_type = ELF64_R_TYPE (rel->r_info);
5388 switch (r_type)
5389 {
5390 case R_PPC64_TLSGD:
5391 case R_PPC64_TLSLD:
5392 /* These special tls relocs tie a call to __tls_get_addr with
5393 its parameter symbol. */
5394 break;
5395
5396 case R_PPC64_GOT_TLSLD16:
5397 case R_PPC64_GOT_TLSLD16_LO:
5398 case R_PPC64_GOT_TLSLD16_HI:
5399 case R_PPC64_GOT_TLSLD16_HA:
5400 tls_type = TLS_TLS | TLS_LD;
5401 goto dogottls;
5402
5403 case R_PPC64_GOT_TLSGD16:
5404 case R_PPC64_GOT_TLSGD16_LO:
5405 case R_PPC64_GOT_TLSGD16_HI:
5406 case R_PPC64_GOT_TLSGD16_HA:
5407 tls_type = TLS_TLS | TLS_GD;
5408 goto dogottls;
5409
5410 case R_PPC64_GOT_TPREL16_DS:
5411 case R_PPC64_GOT_TPREL16_LO_DS:
5412 case R_PPC64_GOT_TPREL16_HI:
5413 case R_PPC64_GOT_TPREL16_HA:
5414 if (bfd_link_pic (info))
5415 info->flags |= DF_STATIC_TLS;
5416 tls_type = TLS_TLS | TLS_TPREL;
5417 goto dogottls;
5418
5419 case R_PPC64_GOT_DTPREL16_DS:
5420 case R_PPC64_GOT_DTPREL16_LO_DS:
5421 case R_PPC64_GOT_DTPREL16_HI:
5422 case R_PPC64_GOT_DTPREL16_HA:
5423 tls_type = TLS_TLS | TLS_DTPREL;
5424 dogottls:
5425 sec->has_tls_reloc = 1;
5426 /* Fall thru */
5427
5428 case R_PPC64_GOT16:
5429 case R_PPC64_GOT16_DS:
5430 case R_PPC64_GOT16_HA:
5431 case R_PPC64_GOT16_HI:
5432 case R_PPC64_GOT16_LO:
5433 case R_PPC64_GOT16_LO_DS:
5434 /* This symbol requires a global offset table entry. */
5435 sec->has_toc_reloc = 1;
5436 if (r_type == R_PPC64_GOT_TLSLD16
5437 || r_type == R_PPC64_GOT_TLSGD16
5438 || r_type == R_PPC64_GOT_TPREL16_DS
5439 || r_type == R_PPC64_GOT_DTPREL16_DS
5440 || r_type == R_PPC64_GOT16
5441 || r_type == R_PPC64_GOT16_DS)
5442 {
5443 htab->do_multi_toc = 1;
5444 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5445 }
5446
5447 if (ppc64_elf_tdata (abfd)->got == NULL
5448 && !create_got_section (abfd, info))
5449 return FALSE;
5450
5451 if (h != NULL)
5452 {
5453 struct ppc_link_hash_entry *eh;
5454 struct got_entry *ent;
5455
5456 eh = (struct ppc_link_hash_entry *) h;
5457 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5458 if (ent->addend == rel->r_addend
5459 && ent->owner == abfd
5460 && ent->tls_type == tls_type)
5461 break;
5462 if (ent == NULL)
5463 {
5464 bfd_size_type amt = sizeof (*ent);
5465 ent = bfd_alloc (abfd, amt);
5466 if (ent == NULL)
5467 return FALSE;
5468 ent->next = eh->elf.got.glist;
5469 ent->addend = rel->r_addend;
5470 ent->owner = abfd;
5471 ent->tls_type = tls_type;
5472 ent->is_indirect = FALSE;
5473 ent->got.refcount = 0;
5474 eh->elf.got.glist = ent;
5475 }
5476 ent->got.refcount += 1;
5477 eh->tls_mask |= tls_type;
5478 }
5479 else
5480 /* This is a global offset table entry for a local symbol. */
5481 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5482 rel->r_addend, tls_type))
5483 return FALSE;
5484
5485 /* We may also need a plt entry if the symbol turns out to be
5486 an ifunc. */
5487 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5488 {
5489 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5490 return FALSE;
5491 }
5492 break;
5493
5494 case R_PPC64_PLT16_HA:
5495 case R_PPC64_PLT16_HI:
5496 case R_PPC64_PLT16_LO:
5497 case R_PPC64_PLT32:
5498 case R_PPC64_PLT64:
5499 /* This symbol requires a procedure linkage table entry. */
5500 plt_list = ifunc;
5501 if (h != NULL)
5502 {
5503 h->needs_plt = 1;
5504 if (h->root.root.string[0] == '.'
5505 && h->root.root.string[1] != '\0')
5506 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5507 plt_list = &h->plt.plist;
5508 }
5509 if (plt_list == NULL)
5510 {
5511 /* It does not make sense to have a procedure linkage
5512 table entry for a non-ifunc local symbol. */
5513 info->callbacks->einfo
5514 (_("%P: %H: %s reloc against local symbol\n"),
5515 abfd, sec, rel->r_offset,
5516 ppc64_elf_howto_table[r_type]->name);
5517 bfd_set_error (bfd_error_bad_value);
5518 return FALSE;
5519 }
5520 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5521 return FALSE;
5522 break;
5523
5524 /* The following relocations don't need to propagate the
5525 relocation if linking a shared object since they are
5526 section relative. */
5527 case R_PPC64_SECTOFF:
5528 case R_PPC64_SECTOFF_LO:
5529 case R_PPC64_SECTOFF_HI:
5530 case R_PPC64_SECTOFF_HA:
5531 case R_PPC64_SECTOFF_DS:
5532 case R_PPC64_SECTOFF_LO_DS:
5533 case R_PPC64_DTPREL16:
5534 case R_PPC64_DTPREL16_LO:
5535 case R_PPC64_DTPREL16_HI:
5536 case R_PPC64_DTPREL16_HA:
5537 case R_PPC64_DTPREL16_DS:
5538 case R_PPC64_DTPREL16_LO_DS:
5539 case R_PPC64_DTPREL16_HIGH:
5540 case R_PPC64_DTPREL16_HIGHA:
5541 case R_PPC64_DTPREL16_HIGHER:
5542 case R_PPC64_DTPREL16_HIGHERA:
5543 case R_PPC64_DTPREL16_HIGHEST:
5544 case R_PPC64_DTPREL16_HIGHESTA:
5545 break;
5546
5547 /* Nor do these. */
5548 case R_PPC64_REL16:
5549 case R_PPC64_REL16_LO:
5550 case R_PPC64_REL16_HI:
5551 case R_PPC64_REL16_HA:
5552 case R_PPC64_REL16DX_HA:
5553 break;
5554
5555 /* Not supported as a dynamic relocation. */
5556 case R_PPC64_ADDR64_LOCAL:
5557 if (bfd_link_pic (info))
5558 {
5559 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5560 ppc_howto_init ();
5561 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5562 "in shared libraries and PIEs.\n"),
5563 abfd, sec, rel->r_offset,
5564 ppc64_elf_howto_table[r_type]->name);
5565 bfd_set_error (bfd_error_bad_value);
5566 return FALSE;
5567 }
5568 break;
5569
5570 case R_PPC64_TOC16:
5571 case R_PPC64_TOC16_DS:
5572 htab->do_multi_toc = 1;
5573 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5574 case R_PPC64_TOC16_LO:
5575 case R_PPC64_TOC16_HI:
5576 case R_PPC64_TOC16_HA:
5577 case R_PPC64_TOC16_LO_DS:
5578 sec->has_toc_reloc = 1;
5579 break;
5580
5581 /* Marker reloc. */
5582 case R_PPC64_ENTRY:
5583 break;
5584
5585 /* This relocation describes the C++ object vtable hierarchy.
5586 Reconstruct it for later use during GC. */
5587 case R_PPC64_GNU_VTINHERIT:
5588 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5589 return FALSE;
5590 break;
5591
5592 /* This relocation describes which C++ vtable entries are actually
5593 used. Record for later use during GC. */
5594 case R_PPC64_GNU_VTENTRY:
5595 BFD_ASSERT (h != NULL);
5596 if (h != NULL
5597 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5598 return FALSE;
5599 break;
5600
5601 case R_PPC64_REL14:
5602 case R_PPC64_REL14_BRTAKEN:
5603 case R_PPC64_REL14_BRNTAKEN:
5604 {
5605 asection *dest = NULL;
5606
5607 /* Heuristic: If jumping outside our section, chances are
5608 we are going to need a stub. */
5609 if (h != NULL)
5610 {
5611 /* If the sym is weak it may be overridden later, so
5612 don't assume we know where a weak sym lives. */
5613 if (h->root.type == bfd_link_hash_defined)
5614 dest = h->root.u.def.section;
5615 }
5616 else
5617 {
5618 Elf_Internal_Sym *isym;
5619
5620 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5621 abfd, r_symndx);
5622 if (isym == NULL)
5623 return FALSE;
5624
5625 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5626 }
5627
5628 if (dest != sec)
5629 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5630 }
5631 /* Fall through. */
5632
5633 case R_PPC64_REL24:
5634 plt_list = ifunc;
5635 if (h != NULL)
5636 {
5637 h->needs_plt = 1;
5638 if (h->root.root.string[0] == '.'
5639 && h->root.root.string[1] != '\0')
5640 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5641
5642 if (h == tga || h == dottga)
5643 {
5644 sec->has_tls_reloc = 1;
5645 if (rel != relocs
5646 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5647 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5648 /* We have a new-style __tls_get_addr call with
5649 a marker reloc. */
5650 ;
5651 else
5652 /* Mark this section as having an old-style call. */
5653 sec->has_tls_get_addr_call = 1;
5654 }
5655 plt_list = &h->plt.plist;
5656 }
5657
5658 /* We may need a .plt entry if the function this reloc
5659 refers to is in a shared lib. */
5660 if (plt_list
5661 && !update_plt_info (abfd, plt_list, rel->r_addend))
5662 return FALSE;
5663 break;
5664
5665 case R_PPC64_ADDR14:
5666 case R_PPC64_ADDR14_BRNTAKEN:
5667 case R_PPC64_ADDR14_BRTAKEN:
5668 case R_PPC64_ADDR24:
5669 goto dodyn;
5670
5671 case R_PPC64_TPREL64:
5672 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5673 if (bfd_link_pic (info))
5674 info->flags |= DF_STATIC_TLS;
5675 goto dotlstoc;
5676
5677 case R_PPC64_DTPMOD64:
5678 if (rel + 1 < rel_end
5679 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5680 && rel[1].r_offset == rel->r_offset + 8)
5681 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5682 else
5683 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5684 goto dotlstoc;
5685
5686 case R_PPC64_DTPREL64:
5687 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5688 if (rel != relocs
5689 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5690 && rel[-1].r_offset == rel->r_offset - 8)
5691 /* This is the second reloc of a dtpmod, dtprel pair.
5692 Don't mark with TLS_DTPREL. */
5693 goto dodyn;
5694
5695 dotlstoc:
5696 sec->has_tls_reloc = 1;
5697 if (h != NULL)
5698 {
5699 struct ppc_link_hash_entry *eh;
5700 eh = (struct ppc_link_hash_entry *) h;
5701 eh->tls_mask |= tls_type;
5702 }
5703 else
5704 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5705 rel->r_addend, tls_type))
5706 return FALSE;
5707
5708 ppc64_sec = ppc64_elf_section_data (sec);
5709 if (ppc64_sec->sec_type != sec_toc)
5710 {
5711 bfd_size_type amt;
5712
5713 /* One extra to simplify get_tls_mask. */
5714 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5715 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5716 if (ppc64_sec->u.toc.symndx == NULL)
5717 return FALSE;
5718 amt = sec->size * sizeof (bfd_vma) / 8;
5719 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5720 if (ppc64_sec->u.toc.add == NULL)
5721 return FALSE;
5722 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5723 ppc64_sec->sec_type = sec_toc;
5724 }
5725 BFD_ASSERT (rel->r_offset % 8 == 0);
5726 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5727 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5728
5729 /* Mark the second slot of a GD or LD entry.
5730 -1 to indicate GD and -2 to indicate LD. */
5731 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5732 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5733 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5734 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5735 goto dodyn;
5736
5737 case R_PPC64_TPREL16:
5738 case R_PPC64_TPREL16_LO:
5739 case R_PPC64_TPREL16_HI:
5740 case R_PPC64_TPREL16_HA:
5741 case R_PPC64_TPREL16_DS:
5742 case R_PPC64_TPREL16_LO_DS:
5743 case R_PPC64_TPREL16_HIGH:
5744 case R_PPC64_TPREL16_HIGHA:
5745 case R_PPC64_TPREL16_HIGHER:
5746 case R_PPC64_TPREL16_HIGHERA:
5747 case R_PPC64_TPREL16_HIGHEST:
5748 case R_PPC64_TPREL16_HIGHESTA:
5749 if (bfd_link_pic (info))
5750 {
5751 info->flags |= DF_STATIC_TLS;
5752 goto dodyn;
5753 }
5754 break;
5755
5756 case R_PPC64_ADDR64:
5757 if (opd_sym_map != NULL
5758 && rel + 1 < rel_end
5759 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5760 {
5761 if (h != NULL)
5762 {
5763 if (h->root.root.string[0] == '.'
5764 && h->root.root.string[1] != 0
5765 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5766 ;
5767 else
5768 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5769 }
5770 else
5771 {
5772 asection *s;
5773 Elf_Internal_Sym *isym;
5774
5775 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5776 abfd, r_symndx);
5777 if (isym == NULL)
5778 return FALSE;
5779
5780 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5781 if (s != NULL && s != sec)
5782 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5783 }
5784 }
5785 /* Fall through. */
5786
5787 case R_PPC64_ADDR16:
5788 case R_PPC64_ADDR16_DS:
5789 case R_PPC64_ADDR16_HA:
5790 case R_PPC64_ADDR16_HI:
5791 case R_PPC64_ADDR16_HIGH:
5792 case R_PPC64_ADDR16_HIGHA:
5793 case R_PPC64_ADDR16_HIGHER:
5794 case R_PPC64_ADDR16_HIGHERA:
5795 case R_PPC64_ADDR16_HIGHEST:
5796 case R_PPC64_ADDR16_HIGHESTA:
5797 case R_PPC64_ADDR16_LO:
5798 case R_PPC64_ADDR16_LO_DS:
5799 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5800 && rel->r_addend == 0)
5801 {
5802 /* We may need a .plt entry if this reloc refers to a
5803 function in a shared lib. */
5804 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5805 return FALSE;
5806 h->pointer_equality_needed = 1;
5807 }
5808 /* Fall through. */
5809
5810 case R_PPC64_REL30:
5811 case R_PPC64_REL32:
5812 case R_PPC64_REL64:
5813 case R_PPC64_ADDR32:
5814 case R_PPC64_UADDR16:
5815 case R_PPC64_UADDR32:
5816 case R_PPC64_UADDR64:
5817 case R_PPC64_TOC:
5818 if (h != NULL && !bfd_link_pic (info))
5819 /* We may need a copy reloc. */
5820 h->non_got_ref = 1;
5821
5822 /* Don't propagate .opd relocs. */
5823 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5824 break;
5825
5826 /* If we are creating a shared library, and this is a reloc
5827 against a global symbol, or a non PC relative reloc
5828 against a local symbol, then we need to copy the reloc
5829 into the shared library. However, if we are linking with
5830 -Bsymbolic, we do not need to copy a reloc against a
5831 global symbol which is defined in an object we are
5832 including in the link (i.e., DEF_REGULAR is set). At
5833 this point we have not seen all the input files, so it is
5834 possible that DEF_REGULAR is not set now but will be set
5835 later (it is never cleared). In case of a weak definition,
5836 DEF_REGULAR may be cleared later by a strong definition in
5837 a shared library. We account for that possibility below by
5838 storing information in the dyn_relocs field of the hash
5839 table entry. A similar situation occurs when creating
5840 shared libraries and symbol visibility changes render the
5841 symbol local.
5842
5843 If on the other hand, we are creating an executable, we
5844 may need to keep relocations for symbols satisfied by a
5845 dynamic library if we manage to avoid copy relocs for the
5846 symbol. */
5847 dodyn:
5848 if ((bfd_link_pic (info)
5849 && (must_be_dyn_reloc (info, r_type)
5850 || (h != NULL
5851 && (!SYMBOLIC_BIND (info, h)
5852 || h->root.type == bfd_link_hash_defweak
5853 || !h->def_regular))))
5854 || (ELIMINATE_COPY_RELOCS
5855 && !bfd_link_pic (info)
5856 && h != NULL
5857 && (h->root.type == bfd_link_hash_defweak
5858 || !h->def_regular))
5859 || (!bfd_link_pic (info)
5860 && ifunc != NULL))
5861 {
5862 /* We must copy these reloc types into the output file.
5863 Create a reloc section in dynobj and make room for
5864 this reloc. */
5865 if (sreloc == NULL)
5866 {
5867 sreloc = _bfd_elf_make_dynamic_reloc_section
5868 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5869
5870 if (sreloc == NULL)
5871 return FALSE;
5872 }
5873
5874 /* If this is a global symbol, we count the number of
5875 relocations we need for this symbol. */
5876 if (h != NULL)
5877 {
5878 struct elf_dyn_relocs *p;
5879 struct elf_dyn_relocs **head;
5880
5881 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5882 p = *head;
5883 if (p == NULL || p->sec != sec)
5884 {
5885 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5886 if (p == NULL)
5887 return FALSE;
5888 p->next = *head;
5889 *head = p;
5890 p->sec = sec;
5891 p->count = 0;
5892 p->pc_count = 0;
5893 }
5894 p->count += 1;
5895 if (!must_be_dyn_reloc (info, r_type))
5896 p->pc_count += 1;
5897 }
5898 else
5899 {
5900 /* Track dynamic relocs needed for local syms too.
5901 We really need local syms available to do this
5902 easily. Oh well. */
5903 struct ppc_dyn_relocs *p;
5904 struct ppc_dyn_relocs **head;
5905 bfd_boolean is_ifunc;
5906 asection *s;
5907 void *vpp;
5908 Elf_Internal_Sym *isym;
5909
5910 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5911 abfd, r_symndx);
5912 if (isym == NULL)
5913 return FALSE;
5914
5915 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5916 if (s == NULL)
5917 s = sec;
5918
5919 vpp = &elf_section_data (s)->local_dynrel;
5920 head = (struct ppc_dyn_relocs **) vpp;
5921 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5922 p = *head;
5923 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5924 p = p->next;
5925 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5926 {
5927 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5928 if (p == NULL)
5929 return FALSE;
5930 p->next = *head;
5931 *head = p;
5932 p->sec = sec;
5933 p->ifunc = is_ifunc;
5934 p->count = 0;
5935 }
5936 p->count += 1;
5937 }
5938 }
5939 break;
5940
5941 default:
5942 break;
5943 }
5944 }
5945
5946 return TRUE;
5947 }
5948
5949 /* Merge backend specific data from an object file to the output
5950 object file when linking. */
5951
5952 static bfd_boolean
5953 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5954 {
5955 unsigned long iflags, oflags;
5956
5957 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5958 return TRUE;
5959
5960 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5961 return TRUE;
5962
5963 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5964 return FALSE;
5965
5966 iflags = elf_elfheader (ibfd)->e_flags;
5967 oflags = elf_elfheader (obfd)->e_flags;
5968
5969 if (iflags & ~EF_PPC64_ABI)
5970 {
5971 (*_bfd_error_handler)
5972 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5973 bfd_set_error (bfd_error_bad_value);
5974 return FALSE;
5975 }
5976 else if (iflags != oflags && iflags != 0)
5977 {
5978 (*_bfd_error_handler)
5979 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5980 ibfd, iflags, oflags);
5981 bfd_set_error (bfd_error_bad_value);
5982 return FALSE;
5983 }
5984
5985 /* Merge Tag_compatibility attributes and any common GNU ones. */
5986 _bfd_elf_merge_object_attributes (ibfd, obfd);
5987
5988 return TRUE;
5989 }
5990
5991 static bfd_boolean
5992 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5993 {
5994 /* Print normal ELF private data. */
5995 _bfd_elf_print_private_bfd_data (abfd, ptr);
5996
5997 if (elf_elfheader (abfd)->e_flags != 0)
5998 {
5999 FILE *file = ptr;
6000
6001 /* xgettext:c-format */
6002 fprintf (file, _("private flags = 0x%lx:"),
6003 elf_elfheader (abfd)->e_flags);
6004
6005 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6006 fprintf (file, _(" [abiv%ld]"),
6007 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6008 fputc ('\n', file);
6009 }
6010
6011 return TRUE;
6012 }
6013
6014 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6015 of the code entry point, and its section, which must be in the same
6016 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6017
6018 static bfd_vma
6019 opd_entry_value (asection *opd_sec,
6020 bfd_vma offset,
6021 asection **code_sec,
6022 bfd_vma *code_off,
6023 bfd_boolean in_code_sec)
6024 {
6025 bfd *opd_bfd = opd_sec->owner;
6026 Elf_Internal_Rela *relocs;
6027 Elf_Internal_Rela *lo, *hi, *look;
6028 bfd_vma val;
6029
6030 /* No relocs implies we are linking a --just-symbols object, or looking
6031 at a final linked executable with addr2line or somesuch. */
6032 if (opd_sec->reloc_count == 0)
6033 {
6034 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6035
6036 if (contents == NULL)
6037 {
6038 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6039 return (bfd_vma) -1;
6040 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6041 }
6042
6043 /* PR 17512: file: 64b9dfbb. */
6044 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6045 return (bfd_vma) -1;
6046
6047 val = bfd_get_64 (opd_bfd, contents + offset);
6048 if (code_sec != NULL)
6049 {
6050 asection *sec, *likely = NULL;
6051
6052 if (in_code_sec)
6053 {
6054 sec = *code_sec;
6055 if (sec->vma <= val
6056 && val < sec->vma + sec->size)
6057 likely = sec;
6058 else
6059 val = -1;
6060 }
6061 else
6062 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6063 if (sec->vma <= val
6064 && (sec->flags & SEC_LOAD) != 0
6065 && (sec->flags & SEC_ALLOC) != 0)
6066 likely = sec;
6067 if (likely != NULL)
6068 {
6069 *code_sec = likely;
6070 if (code_off != NULL)
6071 *code_off = val - likely->vma;
6072 }
6073 }
6074 return val;
6075 }
6076
6077 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6078
6079 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6080 if (relocs == NULL)
6081 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6082 /* PR 17512: file: df8e1fd6. */
6083 if (relocs == NULL)
6084 return (bfd_vma) -1;
6085
6086 /* Go find the opd reloc at the sym address. */
6087 lo = relocs;
6088 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6089 val = (bfd_vma) -1;
6090 while (lo < hi)
6091 {
6092 look = lo + (hi - lo) / 2;
6093 if (look->r_offset < offset)
6094 lo = look + 1;
6095 else if (look->r_offset > offset)
6096 hi = look;
6097 else
6098 {
6099 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6100
6101 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6102 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6103 {
6104 unsigned long symndx = ELF64_R_SYM (look->r_info);
6105 asection *sec = NULL;
6106
6107 if (symndx >= symtab_hdr->sh_info
6108 && elf_sym_hashes (opd_bfd) != NULL)
6109 {
6110 struct elf_link_hash_entry **sym_hashes;
6111 struct elf_link_hash_entry *rh;
6112
6113 sym_hashes = elf_sym_hashes (opd_bfd);
6114 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6115 if (rh != NULL)
6116 {
6117 rh = elf_follow_link (rh);
6118 if (rh->root.type != bfd_link_hash_defined
6119 && rh->root.type != bfd_link_hash_defweak)
6120 break;
6121 if (rh->root.u.def.section->owner == opd_bfd)
6122 {
6123 val = rh->root.u.def.value;
6124 sec = rh->root.u.def.section;
6125 }
6126 }
6127 }
6128
6129 if (sec == NULL)
6130 {
6131 Elf_Internal_Sym *sym;
6132
6133 if (symndx < symtab_hdr->sh_info)
6134 {
6135 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6136 if (sym == NULL)
6137 {
6138 size_t symcnt = symtab_hdr->sh_info;
6139 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6140 symcnt, 0,
6141 NULL, NULL, NULL);
6142 if (sym == NULL)
6143 break;
6144 symtab_hdr->contents = (bfd_byte *) sym;
6145 }
6146 sym += symndx;
6147 }
6148 else
6149 {
6150 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6151 1, symndx,
6152 NULL, NULL, NULL);
6153 if (sym == NULL)
6154 break;
6155 }
6156 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6157 if (sec == NULL)
6158 break;
6159 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6160 val = sym->st_value;
6161 }
6162
6163 val += look->r_addend;
6164 if (code_off != NULL)
6165 *code_off = val;
6166 if (code_sec != NULL)
6167 {
6168 if (in_code_sec && *code_sec != sec)
6169 return -1;
6170 else
6171 *code_sec = sec;
6172 }
6173 if (sec->output_section != NULL)
6174 val += sec->output_section->vma + sec->output_offset;
6175 }
6176 break;
6177 }
6178 }
6179
6180 return val;
6181 }
6182
6183 /* If the ELF symbol SYM might be a function in SEC, return the
6184 function size and set *CODE_OFF to the function's entry point,
6185 otherwise return zero. */
6186
6187 static bfd_size_type
6188 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6189 bfd_vma *code_off)
6190 {
6191 bfd_size_type size;
6192
6193 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6194 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6195 return 0;
6196
6197 size = 0;
6198 if (!(sym->flags & BSF_SYNTHETIC))
6199 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6200
6201 if (strcmp (sym->section->name, ".opd") == 0)
6202 {
6203 struct _opd_sec_data *opd = get_opd_info (sym->section);
6204 bfd_vma symval = sym->value;
6205
6206 if (opd != NULL
6207 && opd->adjust != NULL
6208 && elf_section_data (sym->section)->relocs != NULL)
6209 {
6210 /* opd_entry_value will use cached relocs that have been
6211 adjusted, but with raw symbols. That means both local
6212 and global symbols need adjusting. */
6213 long adjust = opd->adjust[OPD_NDX (symval)];
6214 if (adjust == -1)
6215 return 0;
6216 symval += adjust;
6217 }
6218
6219 if (opd_entry_value (sym->section, symval,
6220 &sec, code_off, TRUE) == (bfd_vma) -1)
6221 return 0;
6222 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6223 symbol. This size has nothing to do with the code size of the
6224 function, which is what we're supposed to return, but the
6225 code size isn't available without looking up the dot-sym.
6226 However, doing that would be a waste of time particularly
6227 since elf_find_function will look at the dot-sym anyway.
6228 Now, elf_find_function will keep the largest size of any
6229 function sym found at the code address of interest, so return
6230 1 here to avoid it incorrectly caching a larger function size
6231 for a small function. This does mean we return the wrong
6232 size for a new-ABI function of size 24, but all that does is
6233 disable caching for such functions. */
6234 if (size == 24)
6235 size = 1;
6236 }
6237 else
6238 {
6239 if (sym->section != sec)
6240 return 0;
6241 *code_off = sym->value;
6242 }
6243 if (size == 0)
6244 size = 1;
6245 return size;
6246 }
6247
6248 /* Return true if symbol is defined in a regular object file. */
6249
6250 static bfd_boolean
6251 is_static_defined (struct elf_link_hash_entry *h)
6252 {
6253 return ((h->root.type == bfd_link_hash_defined
6254 || h->root.type == bfd_link_hash_defweak)
6255 && h->root.u.def.section != NULL
6256 && h->root.u.def.section->output_section != NULL);
6257 }
6258
6259 /* If FDH is a function descriptor symbol, return the associated code
6260 entry symbol if it is defined. Return NULL otherwise. */
6261
6262 static struct ppc_link_hash_entry *
6263 defined_code_entry (struct ppc_link_hash_entry *fdh)
6264 {
6265 if (fdh->is_func_descriptor)
6266 {
6267 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6268 if (fh->elf.root.type == bfd_link_hash_defined
6269 || fh->elf.root.type == bfd_link_hash_defweak)
6270 return fh;
6271 }
6272 return NULL;
6273 }
6274
6275 /* If FH is a function code entry symbol, return the associated
6276 function descriptor symbol if it is defined. Return NULL otherwise. */
6277
6278 static struct ppc_link_hash_entry *
6279 defined_func_desc (struct ppc_link_hash_entry *fh)
6280 {
6281 if (fh->oh != NULL
6282 && fh->oh->is_func_descriptor)
6283 {
6284 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6285 if (fdh->elf.root.type == bfd_link_hash_defined
6286 || fdh->elf.root.type == bfd_link_hash_defweak)
6287 return fdh;
6288 }
6289 return NULL;
6290 }
6291
6292 /* Mark all our entry sym sections, both opd and code section. */
6293
6294 static void
6295 ppc64_elf_gc_keep (struct bfd_link_info *info)
6296 {
6297 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6298 struct bfd_sym_chain *sym;
6299
6300 if (htab == NULL)
6301 return;
6302
6303 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6304 {
6305 struct ppc_link_hash_entry *eh, *fh;
6306 asection *sec;
6307
6308 eh = (struct ppc_link_hash_entry *)
6309 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6310 if (eh == NULL)
6311 continue;
6312 if (eh->elf.root.type != bfd_link_hash_defined
6313 && eh->elf.root.type != bfd_link_hash_defweak)
6314 continue;
6315
6316 fh = defined_code_entry (eh);
6317 if (fh != NULL)
6318 {
6319 sec = fh->elf.root.u.def.section;
6320 sec->flags |= SEC_KEEP;
6321 }
6322 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6323 && opd_entry_value (eh->elf.root.u.def.section,
6324 eh->elf.root.u.def.value,
6325 &sec, NULL, FALSE) != (bfd_vma) -1)
6326 sec->flags |= SEC_KEEP;
6327
6328 sec = eh->elf.root.u.def.section;
6329 sec->flags |= SEC_KEEP;
6330 }
6331 }
6332
6333 /* Mark sections containing dynamically referenced symbols. When
6334 building shared libraries, we must assume that any visible symbol is
6335 referenced. */
6336
6337 static bfd_boolean
6338 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6339 {
6340 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6341 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6342 struct ppc_link_hash_entry *fdh;
6343 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6344
6345 /* Dynamic linking info is on the func descriptor sym. */
6346 fdh = defined_func_desc (eh);
6347 if (fdh != NULL)
6348 eh = fdh;
6349
6350 if ((eh->elf.root.type == bfd_link_hash_defined
6351 || eh->elf.root.type == bfd_link_hash_defweak)
6352 && (eh->elf.ref_dynamic
6353 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6354 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6355 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6356 && (!bfd_link_executable (info)
6357 || info->export_dynamic
6358 || (eh->elf.dynamic
6359 && d != NULL
6360 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6361 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6362 || !bfd_hide_sym_by_version (info->version_info,
6363 eh->elf.root.root.string)))))
6364 {
6365 asection *code_sec;
6366 struct ppc_link_hash_entry *fh;
6367
6368 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6369
6370 /* Function descriptor syms cause the associated
6371 function code sym section to be marked. */
6372 fh = defined_code_entry (eh);
6373 if (fh != NULL)
6374 {
6375 code_sec = fh->elf.root.u.def.section;
6376 code_sec->flags |= SEC_KEEP;
6377 }
6378 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6379 && opd_entry_value (eh->elf.root.u.def.section,
6380 eh->elf.root.u.def.value,
6381 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6382 code_sec->flags |= SEC_KEEP;
6383 }
6384
6385 return TRUE;
6386 }
6387
6388 /* Return the section that should be marked against GC for a given
6389 relocation. */
6390
6391 static asection *
6392 ppc64_elf_gc_mark_hook (asection *sec,
6393 struct bfd_link_info *info,
6394 Elf_Internal_Rela *rel,
6395 struct elf_link_hash_entry *h,
6396 Elf_Internal_Sym *sym)
6397 {
6398 asection *rsec;
6399
6400 /* Syms return NULL if we're marking .opd, so we avoid marking all
6401 function sections, as all functions are referenced in .opd. */
6402 rsec = NULL;
6403 if (get_opd_info (sec) != NULL)
6404 return rsec;
6405
6406 if (h != NULL)
6407 {
6408 enum elf_ppc64_reloc_type r_type;
6409 struct ppc_link_hash_entry *eh, *fh, *fdh;
6410
6411 r_type = ELF64_R_TYPE (rel->r_info);
6412 switch (r_type)
6413 {
6414 case R_PPC64_GNU_VTINHERIT:
6415 case R_PPC64_GNU_VTENTRY:
6416 break;
6417
6418 default:
6419 switch (h->root.type)
6420 {
6421 case bfd_link_hash_defined:
6422 case bfd_link_hash_defweak:
6423 eh = (struct ppc_link_hash_entry *) h;
6424 fdh = defined_func_desc (eh);
6425 if (fdh != NULL)
6426 eh = fdh;
6427
6428 /* Function descriptor syms cause the associated
6429 function code sym section to be marked. */
6430 fh = defined_code_entry (eh);
6431 if (fh != NULL)
6432 {
6433 /* They also mark their opd section. */
6434 eh->elf.root.u.def.section->gc_mark = 1;
6435
6436 rsec = fh->elf.root.u.def.section;
6437 }
6438 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6439 && opd_entry_value (eh->elf.root.u.def.section,
6440 eh->elf.root.u.def.value,
6441 &rsec, NULL, FALSE) != (bfd_vma) -1)
6442 eh->elf.root.u.def.section->gc_mark = 1;
6443 else
6444 rsec = h->root.u.def.section;
6445 break;
6446
6447 case bfd_link_hash_common:
6448 rsec = h->root.u.c.p->section;
6449 break;
6450
6451 default:
6452 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6453 }
6454 }
6455 }
6456 else
6457 {
6458 struct _opd_sec_data *opd;
6459
6460 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6461 opd = get_opd_info (rsec);
6462 if (opd != NULL && opd->func_sec != NULL)
6463 {
6464 rsec->gc_mark = 1;
6465
6466 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6467 }
6468 }
6469
6470 return rsec;
6471 }
6472
6473 /* Update the .got, .plt. and dynamic reloc reference counts for the
6474 section being removed. */
6475
6476 static bfd_boolean
6477 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6478 asection *sec, const Elf_Internal_Rela *relocs)
6479 {
6480 struct ppc_link_hash_table *htab;
6481 Elf_Internal_Shdr *symtab_hdr;
6482 struct elf_link_hash_entry **sym_hashes;
6483 struct got_entry **local_got_ents;
6484 const Elf_Internal_Rela *rel, *relend;
6485
6486 if (bfd_link_relocatable (info))
6487 return TRUE;
6488
6489 if ((sec->flags & SEC_ALLOC) == 0)
6490 return TRUE;
6491
6492 elf_section_data (sec)->local_dynrel = NULL;
6493
6494 htab = ppc_hash_table (info);
6495 if (htab == NULL)
6496 return FALSE;
6497
6498 symtab_hdr = &elf_symtab_hdr (abfd);
6499 sym_hashes = elf_sym_hashes (abfd);
6500 local_got_ents = elf_local_got_ents (abfd);
6501
6502 relend = relocs + sec->reloc_count;
6503 for (rel = relocs; rel < relend; rel++)
6504 {
6505 unsigned long r_symndx;
6506 enum elf_ppc64_reloc_type r_type;
6507 struct elf_link_hash_entry *h = NULL;
6508 struct plt_entry **plt_list;
6509 unsigned char tls_type = 0;
6510
6511 r_symndx = ELF64_R_SYM (rel->r_info);
6512 r_type = ELF64_R_TYPE (rel->r_info);
6513 if (r_symndx >= symtab_hdr->sh_info)
6514 {
6515 struct ppc_link_hash_entry *eh;
6516 struct elf_dyn_relocs **pp;
6517 struct elf_dyn_relocs *p;
6518
6519 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6520 h = elf_follow_link (h);
6521 eh = (struct ppc_link_hash_entry *) h;
6522
6523 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6524 if (p->sec == sec)
6525 {
6526 /* Everything must go for SEC. */
6527 *pp = p->next;
6528 break;
6529 }
6530 }
6531
6532 switch (r_type)
6533 {
6534 case R_PPC64_GOT_TLSLD16:
6535 case R_PPC64_GOT_TLSLD16_LO:
6536 case R_PPC64_GOT_TLSLD16_HI:
6537 case R_PPC64_GOT_TLSLD16_HA:
6538 tls_type = TLS_TLS | TLS_LD;
6539 goto dogot;
6540
6541 case R_PPC64_GOT_TLSGD16:
6542 case R_PPC64_GOT_TLSGD16_LO:
6543 case R_PPC64_GOT_TLSGD16_HI:
6544 case R_PPC64_GOT_TLSGD16_HA:
6545 tls_type = TLS_TLS | TLS_GD;
6546 goto dogot;
6547
6548 case R_PPC64_GOT_TPREL16_DS:
6549 case R_PPC64_GOT_TPREL16_LO_DS:
6550 case R_PPC64_GOT_TPREL16_HI:
6551 case R_PPC64_GOT_TPREL16_HA:
6552 tls_type = TLS_TLS | TLS_TPREL;
6553 goto dogot;
6554
6555 case R_PPC64_GOT_DTPREL16_DS:
6556 case R_PPC64_GOT_DTPREL16_LO_DS:
6557 case R_PPC64_GOT_DTPREL16_HI:
6558 case R_PPC64_GOT_DTPREL16_HA:
6559 tls_type = TLS_TLS | TLS_DTPREL;
6560 goto dogot;
6561
6562 case R_PPC64_GOT16:
6563 case R_PPC64_GOT16_DS:
6564 case R_PPC64_GOT16_HA:
6565 case R_PPC64_GOT16_HI:
6566 case R_PPC64_GOT16_LO:
6567 case R_PPC64_GOT16_LO_DS:
6568 dogot:
6569 {
6570 struct got_entry *ent;
6571
6572 if (h != NULL)
6573 ent = h->got.glist;
6574 else
6575 ent = local_got_ents[r_symndx];
6576
6577 for (; ent != NULL; ent = ent->next)
6578 if (ent->addend == rel->r_addend
6579 && ent->owner == abfd
6580 && ent->tls_type == tls_type)
6581 break;
6582 if (ent == NULL)
6583 abort ();
6584 if (ent->got.refcount > 0)
6585 ent->got.refcount -= 1;
6586 }
6587 break;
6588
6589 case R_PPC64_PLT16_HA:
6590 case R_PPC64_PLT16_HI:
6591 case R_PPC64_PLT16_LO:
6592 case R_PPC64_PLT32:
6593 case R_PPC64_PLT64:
6594 case R_PPC64_REL14:
6595 case R_PPC64_REL14_BRNTAKEN:
6596 case R_PPC64_REL14_BRTAKEN:
6597 case R_PPC64_REL24:
6598 plt_list = NULL;
6599 if (h != NULL)
6600 plt_list = &h->plt.plist;
6601 else if (local_got_ents != NULL)
6602 {
6603 struct plt_entry **local_plt = (struct plt_entry **)
6604 (local_got_ents + symtab_hdr->sh_info);
6605 unsigned char *local_got_tls_masks = (unsigned char *)
6606 (local_plt + symtab_hdr->sh_info);
6607 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6608 plt_list = local_plt + r_symndx;
6609 }
6610 if (plt_list)
6611 {
6612 struct plt_entry *ent;
6613
6614 for (ent = *plt_list; ent != NULL; ent = ent->next)
6615 if (ent->addend == rel->r_addend)
6616 break;
6617 if (ent != NULL && ent->plt.refcount > 0)
6618 ent->plt.refcount -= 1;
6619 }
6620 break;
6621
6622 default:
6623 break;
6624 }
6625 }
6626 return TRUE;
6627 }
6628
6629 /* The maximum size of .sfpr. */
6630 #define SFPR_MAX (218*4)
6631
6632 struct sfpr_def_parms
6633 {
6634 const char name[12];
6635 unsigned char lo, hi;
6636 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6637 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6638 };
6639
6640 /* Auto-generate _save*, _rest* functions in .sfpr.
6641 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6642 instead. */
6643
6644 static bfd_boolean
6645 sfpr_define (struct bfd_link_info *info,
6646 const struct sfpr_def_parms *parm,
6647 asection *stub_sec)
6648 {
6649 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6650 unsigned int i;
6651 size_t len = strlen (parm->name);
6652 bfd_boolean writing = FALSE;
6653 char sym[16];
6654
6655 if (htab == NULL)
6656 return FALSE;
6657
6658 memcpy (sym, parm->name, len);
6659 sym[len + 2] = 0;
6660
6661 for (i = parm->lo; i <= parm->hi; i++)
6662 {
6663 struct ppc_link_hash_entry *h;
6664
6665 sym[len + 0] = i / 10 + '0';
6666 sym[len + 1] = i % 10 + '0';
6667 h = (struct ppc_link_hash_entry *)
6668 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6669 if (stub_sec != NULL)
6670 {
6671 if (h != NULL
6672 && h->elf.root.type == bfd_link_hash_defined
6673 && h->elf.root.u.def.section == htab->sfpr)
6674 {
6675 struct elf_link_hash_entry *s;
6676 char buf[32];
6677 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6678 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6679 if (s == NULL)
6680 return FALSE;
6681 if (s->root.type == bfd_link_hash_new
6682 || (s->root.type = bfd_link_hash_defined
6683 && s->root.u.def.section == stub_sec))
6684 {
6685 s->root.type = bfd_link_hash_defined;
6686 s->root.u.def.section = stub_sec;
6687 s->root.u.def.value = (stub_sec->size
6688 + h->elf.root.u.def.value);
6689 s->ref_regular = 1;
6690 s->def_regular = 1;
6691 s->ref_regular_nonweak = 1;
6692 s->forced_local = 1;
6693 s->non_elf = 0;
6694 s->root.linker_def = 1;
6695 }
6696 }
6697 continue;
6698 }
6699 if (h != NULL)
6700 {
6701 h->save_res = 1;
6702 if (!h->elf.def_regular)
6703 {
6704 h->elf.root.type = bfd_link_hash_defined;
6705 h->elf.root.u.def.section = htab->sfpr;
6706 h->elf.root.u.def.value = htab->sfpr->size;
6707 h->elf.type = STT_FUNC;
6708 h->elf.def_regular = 1;
6709 h->elf.non_elf = 0;
6710 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6711 writing = TRUE;
6712 if (htab->sfpr->contents == NULL)
6713 {
6714 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6715 if (htab->sfpr->contents == NULL)
6716 return FALSE;
6717 }
6718 }
6719 }
6720 if (writing)
6721 {
6722 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6723 if (i != parm->hi)
6724 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6725 else
6726 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6727 htab->sfpr->size = p - htab->sfpr->contents;
6728 }
6729 }
6730
6731 return TRUE;
6732 }
6733
6734 static bfd_byte *
6735 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6736 {
6737 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6738 return p + 4;
6739 }
6740
6741 static bfd_byte *
6742 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6743 {
6744 p = savegpr0 (abfd, p, r);
6745 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6746 p = p + 4;
6747 bfd_put_32 (abfd, BLR, p);
6748 return p + 4;
6749 }
6750
6751 static bfd_byte *
6752 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6753 {
6754 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6755 return p + 4;
6756 }
6757
6758 static bfd_byte *
6759 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6760 {
6761 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6762 p = p + 4;
6763 p = restgpr0 (abfd, p, r);
6764 bfd_put_32 (abfd, MTLR_R0, p);
6765 p = p + 4;
6766 if (r == 29)
6767 {
6768 p = restgpr0 (abfd, p, 30);
6769 p = restgpr0 (abfd, p, 31);
6770 }
6771 bfd_put_32 (abfd, BLR, p);
6772 return p + 4;
6773 }
6774
6775 static bfd_byte *
6776 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6777 {
6778 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6779 return p + 4;
6780 }
6781
6782 static bfd_byte *
6783 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6784 {
6785 p = savegpr1 (abfd, p, r);
6786 bfd_put_32 (abfd, BLR, p);
6787 return p + 4;
6788 }
6789
6790 static bfd_byte *
6791 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6792 {
6793 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6794 return p + 4;
6795 }
6796
6797 static bfd_byte *
6798 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6799 {
6800 p = restgpr1 (abfd, p, r);
6801 bfd_put_32 (abfd, BLR, p);
6802 return p + 4;
6803 }
6804
6805 static bfd_byte *
6806 savefpr (bfd *abfd, bfd_byte *p, int r)
6807 {
6808 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6809 return p + 4;
6810 }
6811
6812 static bfd_byte *
6813 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6814 {
6815 p = savefpr (abfd, p, r);
6816 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6817 p = p + 4;
6818 bfd_put_32 (abfd, BLR, p);
6819 return p + 4;
6820 }
6821
6822 static bfd_byte *
6823 restfpr (bfd *abfd, bfd_byte *p, int r)
6824 {
6825 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6826 return p + 4;
6827 }
6828
6829 static bfd_byte *
6830 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6831 {
6832 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6833 p = p + 4;
6834 p = restfpr (abfd, p, r);
6835 bfd_put_32 (abfd, MTLR_R0, p);
6836 p = p + 4;
6837 if (r == 29)
6838 {
6839 p = restfpr (abfd, p, 30);
6840 p = restfpr (abfd, p, 31);
6841 }
6842 bfd_put_32 (abfd, BLR, p);
6843 return p + 4;
6844 }
6845
6846 static bfd_byte *
6847 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6848 {
6849 p = savefpr (abfd, p, r);
6850 bfd_put_32 (abfd, BLR, p);
6851 return p + 4;
6852 }
6853
6854 static bfd_byte *
6855 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6856 {
6857 p = restfpr (abfd, p, r);
6858 bfd_put_32 (abfd, BLR, p);
6859 return p + 4;
6860 }
6861
6862 static bfd_byte *
6863 savevr (bfd *abfd, bfd_byte *p, int r)
6864 {
6865 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6866 p = p + 4;
6867 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6868 return p + 4;
6869 }
6870
6871 static bfd_byte *
6872 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6873 {
6874 p = savevr (abfd, p, r);
6875 bfd_put_32 (abfd, BLR, p);
6876 return p + 4;
6877 }
6878
6879 static bfd_byte *
6880 restvr (bfd *abfd, bfd_byte *p, int r)
6881 {
6882 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6883 p = p + 4;
6884 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6885 return p + 4;
6886 }
6887
6888 static bfd_byte *
6889 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6890 {
6891 p = restvr (abfd, p, r);
6892 bfd_put_32 (abfd, BLR, p);
6893 return p + 4;
6894 }
6895
6896 /* Called via elf_link_hash_traverse to transfer dynamic linking
6897 information on function code symbol entries to their corresponding
6898 function descriptor symbol entries. */
6899
6900 static bfd_boolean
6901 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6902 {
6903 struct bfd_link_info *info;
6904 struct ppc_link_hash_table *htab;
6905 struct plt_entry *ent;
6906 struct ppc_link_hash_entry *fh;
6907 struct ppc_link_hash_entry *fdh;
6908 bfd_boolean force_local;
6909
6910 fh = (struct ppc_link_hash_entry *) h;
6911 if (fh->elf.root.type == bfd_link_hash_indirect)
6912 return TRUE;
6913
6914 info = inf;
6915 htab = ppc_hash_table (info);
6916 if (htab == NULL)
6917 return FALSE;
6918
6919 /* Resolve undefined references to dot-symbols as the value
6920 in the function descriptor, if we have one in a regular object.
6921 This is to satisfy cases like ".quad .foo". Calls to functions
6922 in dynamic objects are handled elsewhere. */
6923 if (fh->elf.root.type == bfd_link_hash_undefweak
6924 && fh->was_undefined
6925 && (fdh = defined_func_desc (fh)) != NULL
6926 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6927 && opd_entry_value (fdh->elf.root.u.def.section,
6928 fdh->elf.root.u.def.value,
6929 &fh->elf.root.u.def.section,
6930 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6931 {
6932 fh->elf.root.type = fdh->elf.root.type;
6933 fh->elf.forced_local = 1;
6934 fh->elf.def_regular = fdh->elf.def_regular;
6935 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6936 }
6937
6938 /* If this is a function code symbol, transfer dynamic linking
6939 information to the function descriptor symbol. */
6940 if (!fh->is_func)
6941 return TRUE;
6942
6943 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6944 if (ent->plt.refcount > 0)
6945 break;
6946 if (ent == NULL
6947 || fh->elf.root.root.string[0] != '.'
6948 || fh->elf.root.root.string[1] == '\0')
6949 return TRUE;
6950
6951 /* Find the corresponding function descriptor symbol. Create it
6952 as undefined if necessary. */
6953
6954 fdh = lookup_fdh (fh, htab);
6955 if (fdh == NULL
6956 && !bfd_link_executable (info)
6957 && (fh->elf.root.type == bfd_link_hash_undefined
6958 || fh->elf.root.type == bfd_link_hash_undefweak))
6959 {
6960 fdh = make_fdh (info, fh);
6961 if (fdh == NULL)
6962 return FALSE;
6963 }
6964
6965 /* Fake function descriptors are made undefweak. If the function
6966 code symbol is strong undefined, make the fake sym the same.
6967 If the function code symbol is defined, then force the fake
6968 descriptor local; We can't support overriding of symbols in a
6969 shared library on a fake descriptor. */
6970
6971 if (fdh != NULL
6972 && fdh->fake
6973 && fdh->elf.root.type == bfd_link_hash_undefweak)
6974 {
6975 if (fh->elf.root.type == bfd_link_hash_undefined)
6976 {
6977 fdh->elf.root.type = bfd_link_hash_undefined;
6978 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6979 }
6980 else if (fh->elf.root.type == bfd_link_hash_defined
6981 || fh->elf.root.type == bfd_link_hash_defweak)
6982 {
6983 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6984 }
6985 }
6986
6987 if (fdh != NULL
6988 && !fdh->elf.forced_local
6989 && (!bfd_link_executable (info)
6990 || fdh->elf.def_dynamic
6991 || fdh->elf.ref_dynamic
6992 || (fdh->elf.root.type == bfd_link_hash_undefweak
6993 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6994 {
6995 if (fdh->elf.dynindx == -1)
6996 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6997 return FALSE;
6998 fdh->elf.ref_regular |= fh->elf.ref_regular;
6999 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7000 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7001 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7002 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
7003 {
7004 move_plt_plist (fh, fdh);
7005 fdh->elf.needs_plt = 1;
7006 }
7007 fdh->is_func_descriptor = 1;
7008 fdh->oh = fh;
7009 fh->oh = fdh;
7010 }
7011
7012 /* Now that the info is on the function descriptor, clear the
7013 function code sym info. Any function code syms for which we
7014 don't have a definition in a regular file, we force local.
7015 This prevents a shared library from exporting syms that have
7016 been imported from another library. Function code syms that
7017 are really in the library we must leave global to prevent the
7018 linker dragging in a definition from a static library. */
7019 force_local = (!fh->elf.def_regular
7020 || fdh == NULL
7021 || !fdh->elf.def_regular
7022 || fdh->elf.forced_local);
7023 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7024
7025 return TRUE;
7026 }
7027
7028 static const struct sfpr_def_parms save_res_funcs[] =
7029 {
7030 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7031 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7032 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7033 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7034 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7035 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7036 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7037 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7038 { "._savef", 14, 31, savefpr, savefpr1_tail },
7039 { "._restf", 14, 31, restfpr, restfpr1_tail },
7040 { "_savevr_", 20, 31, savevr, savevr_tail },
7041 { "_restvr_", 20, 31, restvr, restvr_tail }
7042 };
7043
7044 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7045 this hook to a) provide some gcc support functions, and b) transfer
7046 dynamic linking information gathered so far on function code symbol
7047 entries, to their corresponding function descriptor symbol entries. */
7048
7049 static bfd_boolean
7050 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7051 struct bfd_link_info *info)
7052 {
7053 struct ppc_link_hash_table *htab;
7054
7055 htab = ppc_hash_table (info);
7056 if (htab == NULL)
7057 return FALSE;
7058
7059 /* Provide any missing _save* and _rest* functions. */
7060 if (htab->sfpr != NULL)
7061 {
7062 unsigned int i;
7063
7064 htab->sfpr->size = 0;
7065 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7066 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7067 return FALSE;
7068 if (htab->sfpr->size == 0)
7069 htab->sfpr->flags |= SEC_EXCLUDE;
7070 }
7071
7072 if (bfd_link_relocatable (info))
7073 return TRUE;
7074
7075 if (htab->elf.hgot != NULL)
7076 {
7077 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7078 /* Make .TOC. defined so as to prevent it being made dynamic.
7079 The wrong value here is fixed later in ppc64_elf_set_toc. */
7080 if (!htab->elf.hgot->def_regular
7081 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7082 {
7083 htab->elf.hgot->root.type = bfd_link_hash_defined;
7084 htab->elf.hgot->root.u.def.value = 0;
7085 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7086 htab->elf.hgot->def_regular = 1;
7087 htab->elf.hgot->root.linker_def = 1;
7088 }
7089 htab->elf.hgot->type = STT_OBJECT;
7090 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7091 | STV_HIDDEN);
7092 }
7093
7094 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7095
7096 return TRUE;
7097 }
7098
7099 /* Return true if we have dynamic relocs that apply to read-only sections. */
7100
7101 static bfd_boolean
7102 readonly_dynrelocs (struct elf_link_hash_entry *h)
7103 {
7104 struct ppc_link_hash_entry *eh;
7105 struct elf_dyn_relocs *p;
7106
7107 eh = (struct ppc_link_hash_entry *) h;
7108 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7109 {
7110 asection *s = p->sec->output_section;
7111
7112 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7113 return TRUE;
7114 }
7115 return FALSE;
7116 }
7117
7118 /* Adjust a symbol defined by a dynamic object and referenced by a
7119 regular object. The current definition is in some section of the
7120 dynamic object, but we're not including those sections. We have to
7121 change the definition to something the rest of the link can
7122 understand. */
7123
7124 static bfd_boolean
7125 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7126 struct elf_link_hash_entry *h)
7127 {
7128 struct ppc_link_hash_table *htab;
7129 asection *s;
7130
7131 htab = ppc_hash_table (info);
7132 if (htab == NULL)
7133 return FALSE;
7134
7135 /* Deal with function syms. */
7136 if (h->type == STT_FUNC
7137 || h->type == STT_GNU_IFUNC
7138 || h->needs_plt)
7139 {
7140 /* Clear procedure linkage table information for any symbol that
7141 won't need a .plt entry. */
7142 struct plt_entry *ent;
7143 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7144 if (ent->plt.refcount > 0)
7145 break;
7146 if (ent == NULL
7147 || (h->type != STT_GNU_IFUNC
7148 && (SYMBOL_CALLS_LOCAL (info, h)
7149 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7150 && h->root.type == bfd_link_hash_undefweak)))
7151 || ((struct ppc_link_hash_entry *) h)->save_res)
7152 {
7153 h->plt.plist = NULL;
7154 h->needs_plt = 0;
7155 h->pointer_equality_needed = 0;
7156 }
7157 else if (abiversion (info->output_bfd) == 2)
7158 {
7159 /* Taking a function's address in a read/write section
7160 doesn't require us to define the function symbol in the
7161 executable on a global entry stub. A dynamic reloc can
7162 be used instead. */
7163 if (h->pointer_equality_needed
7164 && h->type != STT_GNU_IFUNC
7165 && !readonly_dynrelocs (h))
7166 {
7167 h->pointer_equality_needed = 0;
7168 h->non_got_ref = 0;
7169 }
7170
7171 /* After adjust_dynamic_symbol, non_got_ref set in the
7172 non-shared case means that we have allocated space in
7173 .dynbss for the symbol and thus dyn_relocs for this
7174 symbol should be discarded.
7175 If we get here we know we are making a PLT entry for this
7176 symbol, and in an executable we'd normally resolve
7177 relocations against this symbol to the PLT entry. Allow
7178 dynamic relocs if the reference is weak, and the dynamic
7179 relocs will not cause text relocation. */
7180 else if (!h->ref_regular_nonweak
7181 && h->non_got_ref
7182 && h->type != STT_GNU_IFUNC
7183 && !readonly_dynrelocs (h))
7184 h->non_got_ref = 0;
7185
7186 /* If making a plt entry, then we don't need copy relocs. */
7187 return TRUE;
7188 }
7189 }
7190 else
7191 h->plt.plist = NULL;
7192
7193 /* If this is a weak symbol, and there is a real definition, the
7194 processor independent code will have arranged for us to see the
7195 real definition first, and we can just use the same value. */
7196 if (h->u.weakdef != NULL)
7197 {
7198 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7199 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7200 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7201 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7202 if (ELIMINATE_COPY_RELOCS)
7203 h->non_got_ref = h->u.weakdef->non_got_ref;
7204 return TRUE;
7205 }
7206
7207 /* If we are creating a shared library, we must presume that the
7208 only references to the symbol are via the global offset table.
7209 For such cases we need not do anything here; the relocations will
7210 be handled correctly by relocate_section. */
7211 if (bfd_link_pic (info))
7212 return TRUE;
7213
7214 /* If there are no references to this symbol that do not use the
7215 GOT, we don't need to generate a copy reloc. */
7216 if (!h->non_got_ref)
7217 return TRUE;
7218
7219 /* Don't generate a copy reloc for symbols defined in the executable. */
7220 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
7221 return TRUE;
7222
7223 /* If -z nocopyreloc was given, don't generate them either. */
7224 if (info->nocopyreloc)
7225 {
7226 h->non_got_ref = 0;
7227 return TRUE;
7228 }
7229
7230 /* If we didn't find any dynamic relocs in read-only sections, then
7231 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7232 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7233 {
7234 h->non_got_ref = 0;
7235 return TRUE;
7236 }
7237
7238 /* Protected variables do not work with .dynbss. The copy in
7239 .dynbss won't be used by the shared library with the protected
7240 definition for the variable. Text relocations are preferable
7241 to an incorrect program. */
7242 if (h->protected_def)
7243 {
7244 h->non_got_ref = 0;
7245 return TRUE;
7246 }
7247
7248 if (h->plt.plist != NULL)
7249 {
7250 /* We should never get here, but unfortunately there are versions
7251 of gcc out there that improperly (for this ABI) put initialized
7252 function pointers, vtable refs and suchlike in read-only
7253 sections. Allow them to proceed, but warn that this might
7254 break at runtime. */
7255 info->callbacks->einfo
7256 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7257 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7258 h->root.root.string);
7259 }
7260
7261 /* This is a reference to a symbol defined by a dynamic object which
7262 is not a function. */
7263
7264 /* We must allocate the symbol in our .dynbss section, which will
7265 become part of the .bss section of the executable. There will be
7266 an entry for this symbol in the .dynsym section. The dynamic
7267 object will contain position independent code, so all references
7268 from the dynamic object to this symbol will go through the global
7269 offset table. The dynamic linker will use the .dynsym entry to
7270 determine the address it must put in the global offset table, so
7271 both the dynamic object and the regular object will refer to the
7272 same memory location for the variable. */
7273
7274 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7275 to copy the initial value out of the dynamic object and into the
7276 runtime process image. We need to remember the offset into the
7277 .rela.bss section we are going to use. */
7278 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7279 {
7280 htab->relbss->size += sizeof (Elf64_External_Rela);
7281 h->needs_copy = 1;
7282 }
7283
7284 s = htab->dynbss;
7285
7286 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7287 }
7288
7289 /* If given a function descriptor symbol, hide both the function code
7290 sym and the descriptor. */
7291 static void
7292 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7293 struct elf_link_hash_entry *h,
7294 bfd_boolean force_local)
7295 {
7296 struct ppc_link_hash_entry *eh;
7297 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7298
7299 eh = (struct ppc_link_hash_entry *) h;
7300 if (eh->is_func_descriptor)
7301 {
7302 struct ppc_link_hash_entry *fh = eh->oh;
7303
7304 if (fh == NULL)
7305 {
7306 const char *p, *q;
7307 struct ppc_link_hash_table *htab;
7308 char save;
7309
7310 /* We aren't supposed to use alloca in BFD because on
7311 systems which do not have alloca the version in libiberty
7312 calls xmalloc, which might cause the program to crash
7313 when it runs out of memory. This function doesn't have a
7314 return status, so there's no way to gracefully return an
7315 error. So cheat. We know that string[-1] can be safely
7316 accessed; It's either a string in an ELF string table,
7317 or allocated in an objalloc structure. */
7318
7319 p = eh->elf.root.root.string - 1;
7320 save = *p;
7321 *(char *) p = '.';
7322 htab = ppc_hash_table (info);
7323 if (htab == NULL)
7324 return;
7325
7326 fh = (struct ppc_link_hash_entry *)
7327 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7328 *(char *) p = save;
7329
7330 /* Unfortunately, if it so happens that the string we were
7331 looking for was allocated immediately before this string,
7332 then we overwrote the string terminator. That's the only
7333 reason the lookup should fail. */
7334 if (fh == NULL)
7335 {
7336 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7337 while (q >= eh->elf.root.root.string && *q == *p)
7338 --q, --p;
7339 if (q < eh->elf.root.root.string && *p == '.')
7340 fh = (struct ppc_link_hash_entry *)
7341 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7342 }
7343 if (fh != NULL)
7344 {
7345 eh->oh = fh;
7346 fh->oh = eh;
7347 }
7348 }
7349 if (fh != NULL)
7350 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7351 }
7352 }
7353
7354 static bfd_boolean
7355 get_sym_h (struct elf_link_hash_entry **hp,
7356 Elf_Internal_Sym **symp,
7357 asection **symsecp,
7358 unsigned char **tls_maskp,
7359 Elf_Internal_Sym **locsymsp,
7360 unsigned long r_symndx,
7361 bfd *ibfd)
7362 {
7363 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7364
7365 if (r_symndx >= symtab_hdr->sh_info)
7366 {
7367 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7368 struct elf_link_hash_entry *h;
7369
7370 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7371 h = elf_follow_link (h);
7372
7373 if (hp != NULL)
7374 *hp = h;
7375
7376 if (symp != NULL)
7377 *symp = NULL;
7378
7379 if (symsecp != NULL)
7380 {
7381 asection *symsec = NULL;
7382 if (h->root.type == bfd_link_hash_defined
7383 || h->root.type == bfd_link_hash_defweak)
7384 symsec = h->root.u.def.section;
7385 *symsecp = symsec;
7386 }
7387
7388 if (tls_maskp != NULL)
7389 {
7390 struct ppc_link_hash_entry *eh;
7391
7392 eh = (struct ppc_link_hash_entry *) h;
7393 *tls_maskp = &eh->tls_mask;
7394 }
7395 }
7396 else
7397 {
7398 Elf_Internal_Sym *sym;
7399 Elf_Internal_Sym *locsyms = *locsymsp;
7400
7401 if (locsyms == NULL)
7402 {
7403 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7404 if (locsyms == NULL)
7405 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7406 symtab_hdr->sh_info,
7407 0, NULL, NULL, NULL);
7408 if (locsyms == NULL)
7409 return FALSE;
7410 *locsymsp = locsyms;
7411 }
7412 sym = locsyms + r_symndx;
7413
7414 if (hp != NULL)
7415 *hp = NULL;
7416
7417 if (symp != NULL)
7418 *symp = sym;
7419
7420 if (symsecp != NULL)
7421 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7422
7423 if (tls_maskp != NULL)
7424 {
7425 struct got_entry **lgot_ents;
7426 unsigned char *tls_mask;
7427
7428 tls_mask = NULL;
7429 lgot_ents = elf_local_got_ents (ibfd);
7430 if (lgot_ents != NULL)
7431 {
7432 struct plt_entry **local_plt = (struct plt_entry **)
7433 (lgot_ents + symtab_hdr->sh_info);
7434 unsigned char *lgot_masks = (unsigned char *)
7435 (local_plt + symtab_hdr->sh_info);
7436 tls_mask = &lgot_masks[r_symndx];
7437 }
7438 *tls_maskp = tls_mask;
7439 }
7440 }
7441 return TRUE;
7442 }
7443
7444 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7445 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7446 type suitable for optimization, and 1 otherwise. */
7447
7448 static int
7449 get_tls_mask (unsigned char **tls_maskp,
7450 unsigned long *toc_symndx,
7451 bfd_vma *toc_addend,
7452 Elf_Internal_Sym **locsymsp,
7453 const Elf_Internal_Rela *rel,
7454 bfd *ibfd)
7455 {
7456 unsigned long r_symndx;
7457 int next_r;
7458 struct elf_link_hash_entry *h;
7459 Elf_Internal_Sym *sym;
7460 asection *sec;
7461 bfd_vma off;
7462
7463 r_symndx = ELF64_R_SYM (rel->r_info);
7464 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7465 return 0;
7466
7467 if ((*tls_maskp != NULL && **tls_maskp != 0)
7468 || sec == NULL
7469 || ppc64_elf_section_data (sec) == NULL
7470 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7471 return 1;
7472
7473 /* Look inside a TOC section too. */
7474 if (h != NULL)
7475 {
7476 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7477 off = h->root.u.def.value;
7478 }
7479 else
7480 off = sym->st_value;
7481 off += rel->r_addend;
7482 BFD_ASSERT (off % 8 == 0);
7483 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7484 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7485 if (toc_symndx != NULL)
7486 *toc_symndx = r_symndx;
7487 if (toc_addend != NULL)
7488 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7489 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7490 return 0;
7491 if ((h == NULL || is_static_defined (h))
7492 && (next_r == -1 || next_r == -2))
7493 return 1 - next_r;
7494 return 1;
7495 }
7496
7497 /* Find (or create) an entry in the tocsave hash table. */
7498
7499 static struct tocsave_entry *
7500 tocsave_find (struct ppc_link_hash_table *htab,
7501 enum insert_option insert,
7502 Elf_Internal_Sym **local_syms,
7503 const Elf_Internal_Rela *irela,
7504 bfd *ibfd)
7505 {
7506 unsigned long r_indx;
7507 struct elf_link_hash_entry *h;
7508 Elf_Internal_Sym *sym;
7509 struct tocsave_entry ent, *p;
7510 hashval_t hash;
7511 struct tocsave_entry **slot;
7512
7513 r_indx = ELF64_R_SYM (irela->r_info);
7514 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7515 return NULL;
7516 if (ent.sec == NULL || ent.sec->output_section == NULL)
7517 {
7518 (*_bfd_error_handler)
7519 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7520 return NULL;
7521 }
7522
7523 if (h != NULL)
7524 ent.offset = h->root.u.def.value;
7525 else
7526 ent.offset = sym->st_value;
7527 ent.offset += irela->r_addend;
7528
7529 hash = tocsave_htab_hash (&ent);
7530 slot = ((struct tocsave_entry **)
7531 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7532 if (slot == NULL)
7533 return NULL;
7534
7535 if (*slot == NULL)
7536 {
7537 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7538 if (p == NULL)
7539 return NULL;
7540 *p = ent;
7541 *slot = p;
7542 }
7543 return *slot;
7544 }
7545
7546 /* Adjust all global syms defined in opd sections. In gcc generated
7547 code for the old ABI, these will already have been done. */
7548
7549 static bfd_boolean
7550 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7551 {
7552 struct ppc_link_hash_entry *eh;
7553 asection *sym_sec;
7554 struct _opd_sec_data *opd;
7555
7556 if (h->root.type == bfd_link_hash_indirect)
7557 return TRUE;
7558
7559 if (h->root.type != bfd_link_hash_defined
7560 && h->root.type != bfd_link_hash_defweak)
7561 return TRUE;
7562
7563 eh = (struct ppc_link_hash_entry *) h;
7564 if (eh->adjust_done)
7565 return TRUE;
7566
7567 sym_sec = eh->elf.root.u.def.section;
7568 opd = get_opd_info (sym_sec);
7569 if (opd != NULL && opd->adjust != NULL)
7570 {
7571 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7572 if (adjust == -1)
7573 {
7574 /* This entry has been deleted. */
7575 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7576 if (dsec == NULL)
7577 {
7578 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7579 if (discarded_section (dsec))
7580 {
7581 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7582 break;
7583 }
7584 }
7585 eh->elf.root.u.def.value = 0;
7586 eh->elf.root.u.def.section = dsec;
7587 }
7588 else
7589 eh->elf.root.u.def.value += adjust;
7590 eh->adjust_done = 1;
7591 }
7592 return TRUE;
7593 }
7594
7595 /* Handles decrementing dynamic reloc counts for the reloc specified by
7596 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7597 have already been determined. */
7598
7599 static bfd_boolean
7600 dec_dynrel_count (bfd_vma r_info,
7601 asection *sec,
7602 struct bfd_link_info *info,
7603 Elf_Internal_Sym **local_syms,
7604 struct elf_link_hash_entry *h,
7605 Elf_Internal_Sym *sym)
7606 {
7607 enum elf_ppc64_reloc_type r_type;
7608 asection *sym_sec = NULL;
7609
7610 /* Can this reloc be dynamic? This switch, and later tests here
7611 should be kept in sync with the code in check_relocs. */
7612 r_type = ELF64_R_TYPE (r_info);
7613 switch (r_type)
7614 {
7615 default:
7616 return TRUE;
7617
7618 case R_PPC64_TPREL16:
7619 case R_PPC64_TPREL16_LO:
7620 case R_PPC64_TPREL16_HI:
7621 case R_PPC64_TPREL16_HA:
7622 case R_PPC64_TPREL16_DS:
7623 case R_PPC64_TPREL16_LO_DS:
7624 case R_PPC64_TPREL16_HIGH:
7625 case R_PPC64_TPREL16_HIGHA:
7626 case R_PPC64_TPREL16_HIGHER:
7627 case R_PPC64_TPREL16_HIGHERA:
7628 case R_PPC64_TPREL16_HIGHEST:
7629 case R_PPC64_TPREL16_HIGHESTA:
7630 if (!bfd_link_pic (info))
7631 return TRUE;
7632
7633 case R_PPC64_TPREL64:
7634 case R_PPC64_DTPMOD64:
7635 case R_PPC64_DTPREL64:
7636 case R_PPC64_ADDR64:
7637 case R_PPC64_REL30:
7638 case R_PPC64_REL32:
7639 case R_PPC64_REL64:
7640 case R_PPC64_ADDR14:
7641 case R_PPC64_ADDR14_BRNTAKEN:
7642 case R_PPC64_ADDR14_BRTAKEN:
7643 case R_PPC64_ADDR16:
7644 case R_PPC64_ADDR16_DS:
7645 case R_PPC64_ADDR16_HA:
7646 case R_PPC64_ADDR16_HI:
7647 case R_PPC64_ADDR16_HIGH:
7648 case R_PPC64_ADDR16_HIGHA:
7649 case R_PPC64_ADDR16_HIGHER:
7650 case R_PPC64_ADDR16_HIGHERA:
7651 case R_PPC64_ADDR16_HIGHEST:
7652 case R_PPC64_ADDR16_HIGHESTA:
7653 case R_PPC64_ADDR16_LO:
7654 case R_PPC64_ADDR16_LO_DS:
7655 case R_PPC64_ADDR24:
7656 case R_PPC64_ADDR32:
7657 case R_PPC64_UADDR16:
7658 case R_PPC64_UADDR32:
7659 case R_PPC64_UADDR64:
7660 case R_PPC64_TOC:
7661 break;
7662 }
7663
7664 if (local_syms != NULL)
7665 {
7666 unsigned long r_symndx;
7667 bfd *ibfd = sec->owner;
7668
7669 r_symndx = ELF64_R_SYM (r_info);
7670 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7671 return FALSE;
7672 }
7673
7674 if ((bfd_link_pic (info)
7675 && (must_be_dyn_reloc (info, r_type)
7676 || (h != NULL
7677 && (!SYMBOLIC_BIND (info, h)
7678 || h->root.type == bfd_link_hash_defweak
7679 || !h->def_regular))))
7680 || (ELIMINATE_COPY_RELOCS
7681 && !bfd_link_pic (info)
7682 && h != NULL
7683 && (h->root.type == bfd_link_hash_defweak
7684 || !h->def_regular)))
7685 ;
7686 else
7687 return TRUE;
7688
7689 if (h != NULL)
7690 {
7691 struct elf_dyn_relocs *p;
7692 struct elf_dyn_relocs **pp;
7693 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7694
7695 /* elf_gc_sweep may have already removed all dyn relocs associated
7696 with local syms for a given section. Also, symbol flags are
7697 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7698 report a dynreloc miscount. */
7699 if (*pp == NULL && info->gc_sections)
7700 return TRUE;
7701
7702 while ((p = *pp) != NULL)
7703 {
7704 if (p->sec == sec)
7705 {
7706 if (!must_be_dyn_reloc (info, r_type))
7707 p->pc_count -= 1;
7708 p->count -= 1;
7709 if (p->count == 0)
7710 *pp = p->next;
7711 return TRUE;
7712 }
7713 pp = &p->next;
7714 }
7715 }
7716 else
7717 {
7718 struct ppc_dyn_relocs *p;
7719 struct ppc_dyn_relocs **pp;
7720 void *vpp;
7721 bfd_boolean is_ifunc;
7722
7723 if (local_syms == NULL)
7724 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7725 if (sym_sec == NULL)
7726 sym_sec = sec;
7727
7728 vpp = &elf_section_data (sym_sec)->local_dynrel;
7729 pp = (struct ppc_dyn_relocs **) vpp;
7730
7731 if (*pp == NULL && info->gc_sections)
7732 return TRUE;
7733
7734 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7735 while ((p = *pp) != NULL)
7736 {
7737 if (p->sec == sec && p->ifunc == is_ifunc)
7738 {
7739 p->count -= 1;
7740 if (p->count == 0)
7741 *pp = p->next;
7742 return TRUE;
7743 }
7744 pp = &p->next;
7745 }
7746 }
7747
7748 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7749 sec->owner, sec);
7750 bfd_set_error (bfd_error_bad_value);
7751 return FALSE;
7752 }
7753
7754 /* Remove unused Official Procedure Descriptor entries. Currently we
7755 only remove those associated with functions in discarded link-once
7756 sections, or weakly defined functions that have been overridden. It
7757 would be possible to remove many more entries for statically linked
7758 applications. */
7759
7760 bfd_boolean
7761 ppc64_elf_edit_opd (struct bfd_link_info *info)
7762 {
7763 bfd *ibfd;
7764 bfd_boolean some_edited = FALSE;
7765 asection *need_pad = NULL;
7766 struct ppc_link_hash_table *htab;
7767
7768 htab = ppc_hash_table (info);
7769 if (htab == NULL)
7770 return FALSE;
7771
7772 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7773 {
7774 asection *sec;
7775 Elf_Internal_Rela *relstart, *rel, *relend;
7776 Elf_Internal_Shdr *symtab_hdr;
7777 Elf_Internal_Sym *local_syms;
7778 struct _opd_sec_data *opd;
7779 bfd_boolean need_edit, add_aux_fields, broken;
7780 bfd_size_type cnt_16b = 0;
7781
7782 if (!is_ppc64_elf (ibfd))
7783 continue;
7784
7785 sec = bfd_get_section_by_name (ibfd, ".opd");
7786 if (sec == NULL || sec->size == 0)
7787 continue;
7788
7789 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7790 continue;
7791
7792 if (sec->output_section == bfd_abs_section_ptr)
7793 continue;
7794
7795 /* Look through the section relocs. */
7796 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7797 continue;
7798
7799 local_syms = NULL;
7800 symtab_hdr = &elf_symtab_hdr (ibfd);
7801
7802 /* Read the relocations. */
7803 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7804 info->keep_memory);
7805 if (relstart == NULL)
7806 return FALSE;
7807
7808 /* First run through the relocs to check they are sane, and to
7809 determine whether we need to edit this opd section. */
7810 need_edit = FALSE;
7811 broken = FALSE;
7812 need_pad = sec;
7813 relend = relstart + sec->reloc_count;
7814 for (rel = relstart; rel < relend; )
7815 {
7816 enum elf_ppc64_reloc_type r_type;
7817 unsigned long r_symndx;
7818 asection *sym_sec;
7819 struct elf_link_hash_entry *h;
7820 Elf_Internal_Sym *sym;
7821 bfd_vma offset;
7822
7823 /* .opd contains an array of 16 or 24 byte entries. We're
7824 only interested in the reloc pointing to a function entry
7825 point. */
7826 offset = rel->r_offset;
7827 if (rel + 1 == relend
7828 || rel[1].r_offset != offset + 8)
7829 {
7830 /* If someone messes with .opd alignment then after a
7831 "ld -r" we might have padding in the middle of .opd.
7832 Also, there's nothing to prevent someone putting
7833 something silly in .opd with the assembler. No .opd
7834 optimization for them! */
7835 broken_opd:
7836 (*_bfd_error_handler)
7837 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7838 broken = TRUE;
7839 break;
7840 }
7841
7842 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7843 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7844 {
7845 (*_bfd_error_handler)
7846 (_("%B: unexpected reloc type %u in .opd section"),
7847 ibfd, r_type);
7848 broken = TRUE;
7849 break;
7850 }
7851
7852 r_symndx = ELF64_R_SYM (rel->r_info);
7853 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7854 r_symndx, ibfd))
7855 goto error_ret;
7856
7857 if (sym_sec == NULL || sym_sec->owner == NULL)
7858 {
7859 const char *sym_name;
7860 if (h != NULL)
7861 sym_name = h->root.root.string;
7862 else
7863 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7864 sym_sec);
7865
7866 (*_bfd_error_handler)
7867 (_("%B: undefined sym `%s' in .opd section"),
7868 ibfd, sym_name);
7869 broken = TRUE;
7870 break;
7871 }
7872
7873 /* opd entries are always for functions defined in the
7874 current input bfd. If the symbol isn't defined in the
7875 input bfd, then we won't be using the function in this
7876 bfd; It must be defined in a linkonce section in another
7877 bfd, or is weak. It's also possible that we are
7878 discarding the function due to a linker script /DISCARD/,
7879 which we test for via the output_section. */
7880 if (sym_sec->owner != ibfd
7881 || sym_sec->output_section == bfd_abs_section_ptr)
7882 need_edit = TRUE;
7883
7884 rel += 2;
7885 if (rel + 1 == relend
7886 || (rel + 2 < relend
7887 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7888 ++rel;
7889
7890 if (rel == relend)
7891 {
7892 if (sec->size == offset + 24)
7893 {
7894 need_pad = NULL;
7895 break;
7896 }
7897 if (sec->size == offset + 16)
7898 {
7899 cnt_16b++;
7900 break;
7901 }
7902 goto broken_opd;
7903 }
7904 else if (rel + 1 < relend
7905 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7906 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7907 {
7908 if (rel[0].r_offset == offset + 16)
7909 cnt_16b++;
7910 else if (rel[0].r_offset != offset + 24)
7911 goto broken_opd;
7912 }
7913 else
7914 goto broken_opd;
7915 }
7916
7917 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7918
7919 if (!broken && (need_edit || add_aux_fields))
7920 {
7921 Elf_Internal_Rela *write_rel;
7922 Elf_Internal_Shdr *rel_hdr;
7923 bfd_byte *rptr, *wptr;
7924 bfd_byte *new_contents;
7925 bfd_size_type amt;
7926
7927 new_contents = NULL;
7928 amt = OPD_NDX (sec->size) * sizeof (long);
7929 opd = &ppc64_elf_section_data (sec)->u.opd;
7930 opd->adjust = bfd_zalloc (sec->owner, amt);
7931 if (opd->adjust == NULL)
7932 return FALSE;
7933 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7934
7935 /* This seems a waste of time as input .opd sections are all
7936 zeros as generated by gcc, but I suppose there's no reason
7937 this will always be so. We might start putting something in
7938 the third word of .opd entries. */
7939 if ((sec->flags & SEC_IN_MEMORY) == 0)
7940 {
7941 bfd_byte *loc;
7942 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7943 {
7944 if (loc != NULL)
7945 free (loc);
7946 error_ret:
7947 if (local_syms != NULL
7948 && symtab_hdr->contents != (unsigned char *) local_syms)
7949 free (local_syms);
7950 if (elf_section_data (sec)->relocs != relstart)
7951 free (relstart);
7952 return FALSE;
7953 }
7954 sec->contents = loc;
7955 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7956 }
7957
7958 elf_section_data (sec)->relocs = relstart;
7959
7960 new_contents = sec->contents;
7961 if (add_aux_fields)
7962 {
7963 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7964 if (new_contents == NULL)
7965 return FALSE;
7966 need_pad = NULL;
7967 }
7968 wptr = new_contents;
7969 rptr = sec->contents;
7970 write_rel = relstart;
7971 for (rel = relstart; rel < relend; )
7972 {
7973 unsigned long r_symndx;
7974 asection *sym_sec;
7975 struct elf_link_hash_entry *h;
7976 struct ppc_link_hash_entry *fdh = NULL;
7977 Elf_Internal_Sym *sym;
7978 long opd_ent_size;
7979 Elf_Internal_Rela *next_rel;
7980 bfd_boolean skip;
7981
7982 r_symndx = ELF64_R_SYM (rel->r_info);
7983 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7984 r_symndx, ibfd))
7985 goto error_ret;
7986
7987 next_rel = rel + 2;
7988 if (next_rel + 1 == relend
7989 || (next_rel + 2 < relend
7990 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
7991 ++next_rel;
7992
7993 /* See if the .opd entry is full 24 byte or
7994 16 byte (with fd_aux entry overlapped with next
7995 fd_func). */
7996 opd_ent_size = 24;
7997 if (next_rel == relend)
7998 {
7999 if (sec->size == rel->r_offset + 16)
8000 opd_ent_size = 16;
8001 }
8002 else if (next_rel->r_offset == rel->r_offset + 16)
8003 opd_ent_size = 16;
8004
8005 if (h != NULL
8006 && h->root.root.string[0] == '.')
8007 {
8008 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
8009 if (fdh != NULL
8010 && fdh->elf.root.type != bfd_link_hash_defined
8011 && fdh->elf.root.type != bfd_link_hash_defweak)
8012 fdh = NULL;
8013 }
8014
8015 skip = (sym_sec->owner != ibfd
8016 || sym_sec->output_section == bfd_abs_section_ptr);
8017 if (skip)
8018 {
8019 if (fdh != NULL && sym_sec->owner == ibfd)
8020 {
8021 /* Arrange for the function descriptor sym
8022 to be dropped. */
8023 fdh->elf.root.u.def.value = 0;
8024 fdh->elf.root.u.def.section = sym_sec;
8025 }
8026 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8027
8028 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8029 rel = next_rel;
8030 else
8031 while (1)
8032 {
8033 if (!dec_dynrel_count (rel->r_info, sec, info,
8034 NULL, h, sym))
8035 goto error_ret;
8036
8037 if (++rel == next_rel)
8038 break;
8039
8040 r_symndx = ELF64_R_SYM (rel->r_info);
8041 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8042 r_symndx, ibfd))
8043 goto error_ret;
8044 }
8045 }
8046 else
8047 {
8048 /* We'll be keeping this opd entry. */
8049 long adjust;
8050
8051 if (fdh != NULL)
8052 {
8053 /* Redefine the function descriptor symbol to
8054 this location in the opd section. It is
8055 necessary to update the value here rather
8056 than using an array of adjustments as we do
8057 for local symbols, because various places
8058 in the generic ELF code use the value
8059 stored in u.def.value. */
8060 fdh->elf.root.u.def.value = wptr - new_contents;
8061 fdh->adjust_done = 1;
8062 }
8063
8064 /* Local syms are a bit tricky. We could
8065 tweak them as they can be cached, but
8066 we'd need to look through the local syms
8067 for the function descriptor sym which we
8068 don't have at the moment. So keep an
8069 array of adjustments. */
8070 adjust = (wptr - new_contents) - (rptr - sec->contents);
8071 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8072
8073 if (wptr != rptr)
8074 memcpy (wptr, rptr, opd_ent_size);
8075 wptr += opd_ent_size;
8076 if (add_aux_fields && opd_ent_size == 16)
8077 {
8078 memset (wptr, '\0', 8);
8079 wptr += 8;
8080 }
8081
8082 /* We need to adjust any reloc offsets to point to the
8083 new opd entries. */
8084 for ( ; rel != next_rel; ++rel)
8085 {
8086 rel->r_offset += adjust;
8087 if (write_rel != rel)
8088 memcpy (write_rel, rel, sizeof (*rel));
8089 ++write_rel;
8090 }
8091 }
8092
8093 rptr += opd_ent_size;
8094 }
8095
8096 sec->size = wptr - new_contents;
8097 sec->reloc_count = write_rel - relstart;
8098 if (add_aux_fields)
8099 {
8100 free (sec->contents);
8101 sec->contents = new_contents;
8102 }
8103
8104 /* Fudge the header size too, as this is used later in
8105 elf_bfd_final_link if we are emitting relocs. */
8106 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8107 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8108 some_edited = TRUE;
8109 }
8110 else if (elf_section_data (sec)->relocs != relstart)
8111 free (relstart);
8112
8113 if (local_syms != NULL
8114 && symtab_hdr->contents != (unsigned char *) local_syms)
8115 {
8116 if (!info->keep_memory)
8117 free (local_syms);
8118 else
8119 symtab_hdr->contents = (unsigned char *) local_syms;
8120 }
8121 }
8122
8123 if (some_edited)
8124 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8125
8126 /* If we are doing a final link and the last .opd entry is just 16 byte
8127 long, add a 8 byte padding after it. */
8128 if (need_pad != NULL && !bfd_link_relocatable (info))
8129 {
8130 bfd_byte *p;
8131
8132 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8133 {
8134 BFD_ASSERT (need_pad->size > 0);
8135
8136 p = bfd_malloc (need_pad->size + 8);
8137 if (p == NULL)
8138 return FALSE;
8139
8140 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8141 p, 0, need_pad->size))
8142 return FALSE;
8143
8144 need_pad->contents = p;
8145 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8146 }
8147 else
8148 {
8149 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8150 if (p == NULL)
8151 return FALSE;
8152
8153 need_pad->contents = p;
8154 }
8155
8156 memset (need_pad->contents + need_pad->size, 0, 8);
8157 need_pad->size += 8;
8158 }
8159
8160 return TRUE;
8161 }
8162
8163 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8164
8165 asection *
8166 ppc64_elf_tls_setup (struct bfd_link_info *info)
8167 {
8168 struct ppc_link_hash_table *htab;
8169
8170 htab = ppc_hash_table (info);
8171 if (htab == NULL)
8172 return NULL;
8173
8174 if (abiversion (info->output_bfd) == 1)
8175 htab->opd_abi = 1;
8176
8177 if (htab->params->no_multi_toc)
8178 htab->do_multi_toc = 0;
8179 else if (!htab->do_multi_toc)
8180 htab->params->no_multi_toc = 1;
8181
8182 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8183 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8184 FALSE, FALSE, TRUE));
8185 /* Move dynamic linking info to the function descriptor sym. */
8186 if (htab->tls_get_addr != NULL)
8187 func_desc_adjust (&htab->tls_get_addr->elf, info);
8188 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8189 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8190 FALSE, FALSE, TRUE));
8191 if (htab->params->tls_get_addr_opt)
8192 {
8193 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8194
8195 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8196 FALSE, FALSE, TRUE);
8197 if (opt != NULL)
8198 func_desc_adjust (opt, info);
8199 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8200 FALSE, FALSE, TRUE);
8201 if (opt_fd != NULL
8202 && (opt_fd->root.type == bfd_link_hash_defined
8203 || opt_fd->root.type == bfd_link_hash_defweak))
8204 {
8205 /* If glibc supports an optimized __tls_get_addr call stub,
8206 signalled by the presence of __tls_get_addr_opt, and we'll
8207 be calling __tls_get_addr via a plt call stub, then
8208 make __tls_get_addr point to __tls_get_addr_opt. */
8209 tga_fd = &htab->tls_get_addr_fd->elf;
8210 if (htab->elf.dynamic_sections_created
8211 && tga_fd != NULL
8212 && (tga_fd->type == STT_FUNC
8213 || tga_fd->needs_plt)
8214 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8215 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8216 && tga_fd->root.type == bfd_link_hash_undefweak)))
8217 {
8218 struct plt_entry *ent;
8219
8220 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8221 if (ent->plt.refcount > 0)
8222 break;
8223 if (ent != NULL)
8224 {
8225 tga_fd->root.type = bfd_link_hash_indirect;
8226 tga_fd->root.u.i.link = &opt_fd->root;
8227 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8228 opt_fd->forced_local = 0;
8229 if (opt_fd->dynindx != -1)
8230 {
8231 /* Use __tls_get_addr_opt in dynamic relocations. */
8232 opt_fd->dynindx = -1;
8233 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8234 opt_fd->dynstr_index);
8235 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8236 return NULL;
8237 }
8238 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8239 tga = &htab->tls_get_addr->elf;
8240 if (opt != NULL && tga != NULL)
8241 {
8242 tga->root.type = bfd_link_hash_indirect;
8243 tga->root.u.i.link = &opt->root;
8244 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8245 opt->forced_local = 0;
8246 _bfd_elf_link_hash_hide_symbol (info, opt,
8247 tga->forced_local);
8248 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8249 }
8250 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8251 htab->tls_get_addr_fd->is_func_descriptor = 1;
8252 if (htab->tls_get_addr != NULL)
8253 {
8254 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8255 htab->tls_get_addr->is_func = 1;
8256 }
8257 }
8258 }
8259 }
8260 else if (htab->params->tls_get_addr_opt < 0)
8261 htab->params->tls_get_addr_opt = 0;
8262 }
8263 return _bfd_elf_tls_setup (info->output_bfd, info);
8264 }
8265
8266 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8267 HASH1 or HASH2. */
8268
8269 static bfd_boolean
8270 branch_reloc_hash_match (const bfd *ibfd,
8271 const Elf_Internal_Rela *rel,
8272 const struct ppc_link_hash_entry *hash1,
8273 const struct ppc_link_hash_entry *hash2)
8274 {
8275 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8276 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8277 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8278
8279 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8280 {
8281 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8282 struct elf_link_hash_entry *h;
8283
8284 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8285 h = elf_follow_link (h);
8286 if (h == &hash1->elf || h == &hash2->elf)
8287 return TRUE;
8288 }
8289 return FALSE;
8290 }
8291
8292 /* Run through all the TLS relocs looking for optimization
8293 opportunities. The linker has been hacked (see ppc64elf.em) to do
8294 a preliminary section layout so that we know the TLS segment
8295 offsets. We can't optimize earlier because some optimizations need
8296 to know the tp offset, and we need to optimize before allocating
8297 dynamic relocations. */
8298
8299 bfd_boolean
8300 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8301 {
8302 bfd *ibfd;
8303 asection *sec;
8304 struct ppc_link_hash_table *htab;
8305 unsigned char *toc_ref;
8306 int pass;
8307
8308 if (!bfd_link_executable (info))
8309 return TRUE;
8310
8311 htab = ppc_hash_table (info);
8312 if (htab == NULL)
8313 return FALSE;
8314
8315 /* Make two passes over the relocs. On the first pass, mark toc
8316 entries involved with tls relocs, and check that tls relocs
8317 involved in setting up a tls_get_addr call are indeed followed by
8318 such a call. If they are not, we can't do any tls optimization.
8319 On the second pass twiddle tls_mask flags to notify
8320 relocate_section that optimization can be done, and adjust got
8321 and plt refcounts. */
8322 toc_ref = NULL;
8323 for (pass = 0; pass < 2; ++pass)
8324 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8325 {
8326 Elf_Internal_Sym *locsyms = NULL;
8327 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8328
8329 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8330 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8331 {
8332 Elf_Internal_Rela *relstart, *rel, *relend;
8333 bfd_boolean found_tls_get_addr_arg = 0;
8334
8335 /* Read the relocations. */
8336 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8337 info->keep_memory);
8338 if (relstart == NULL)
8339 {
8340 free (toc_ref);
8341 return FALSE;
8342 }
8343
8344 relend = relstart + sec->reloc_count;
8345 for (rel = relstart; rel < relend; rel++)
8346 {
8347 enum elf_ppc64_reloc_type r_type;
8348 unsigned long r_symndx;
8349 struct elf_link_hash_entry *h;
8350 Elf_Internal_Sym *sym;
8351 asection *sym_sec;
8352 unsigned char *tls_mask;
8353 unsigned char tls_set, tls_clear, tls_type = 0;
8354 bfd_vma value;
8355 bfd_boolean ok_tprel, is_local;
8356 long toc_ref_index = 0;
8357 int expecting_tls_get_addr = 0;
8358 bfd_boolean ret = FALSE;
8359
8360 r_symndx = ELF64_R_SYM (rel->r_info);
8361 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8362 r_symndx, ibfd))
8363 {
8364 err_free_rel:
8365 if (elf_section_data (sec)->relocs != relstart)
8366 free (relstart);
8367 if (toc_ref != NULL)
8368 free (toc_ref);
8369 if (locsyms != NULL
8370 && (elf_symtab_hdr (ibfd).contents
8371 != (unsigned char *) locsyms))
8372 free (locsyms);
8373 return ret;
8374 }
8375
8376 if (h != NULL)
8377 {
8378 if (h->root.type == bfd_link_hash_defined
8379 || h->root.type == bfd_link_hash_defweak)
8380 value = h->root.u.def.value;
8381 else if (h->root.type == bfd_link_hash_undefweak)
8382 value = 0;
8383 else
8384 {
8385 found_tls_get_addr_arg = 0;
8386 continue;
8387 }
8388 }
8389 else
8390 /* Symbols referenced by TLS relocs must be of type
8391 STT_TLS. So no need for .opd local sym adjust. */
8392 value = sym->st_value;
8393
8394 ok_tprel = FALSE;
8395 is_local = FALSE;
8396 if (h == NULL
8397 || !h->def_dynamic)
8398 {
8399 is_local = TRUE;
8400 if (h != NULL
8401 && h->root.type == bfd_link_hash_undefweak)
8402 ok_tprel = TRUE;
8403 else if (sym_sec != NULL
8404 && sym_sec->output_section != NULL)
8405 {
8406 value += sym_sec->output_offset;
8407 value += sym_sec->output_section->vma;
8408 value -= htab->elf.tls_sec->vma;
8409 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8410 < (bfd_vma) 1 << 32);
8411 }
8412 }
8413
8414 r_type = ELF64_R_TYPE (rel->r_info);
8415 /* If this section has old-style __tls_get_addr calls
8416 without marker relocs, then check that each
8417 __tls_get_addr call reloc is preceded by a reloc
8418 that conceivably belongs to the __tls_get_addr arg
8419 setup insn. If we don't find matching arg setup
8420 relocs, don't do any tls optimization. */
8421 if (pass == 0
8422 && sec->has_tls_get_addr_call
8423 && h != NULL
8424 && (h == &htab->tls_get_addr->elf
8425 || h == &htab->tls_get_addr_fd->elf)
8426 && !found_tls_get_addr_arg
8427 && is_branch_reloc (r_type))
8428 {
8429 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8430 "TLS optimization disabled\n"),
8431 ibfd, sec, rel->r_offset);
8432 ret = TRUE;
8433 goto err_free_rel;
8434 }
8435
8436 found_tls_get_addr_arg = 0;
8437 switch (r_type)
8438 {
8439 case R_PPC64_GOT_TLSLD16:
8440 case R_PPC64_GOT_TLSLD16_LO:
8441 expecting_tls_get_addr = 1;
8442 found_tls_get_addr_arg = 1;
8443 /* Fall thru */
8444
8445 case R_PPC64_GOT_TLSLD16_HI:
8446 case R_PPC64_GOT_TLSLD16_HA:
8447 /* These relocs should never be against a symbol
8448 defined in a shared lib. Leave them alone if
8449 that turns out to be the case. */
8450 if (!is_local)
8451 continue;
8452
8453 /* LD -> LE */
8454 tls_set = 0;
8455 tls_clear = TLS_LD;
8456 tls_type = TLS_TLS | TLS_LD;
8457 break;
8458
8459 case R_PPC64_GOT_TLSGD16:
8460 case R_PPC64_GOT_TLSGD16_LO:
8461 expecting_tls_get_addr = 1;
8462 found_tls_get_addr_arg = 1;
8463 /* Fall thru */
8464
8465 case R_PPC64_GOT_TLSGD16_HI:
8466 case R_PPC64_GOT_TLSGD16_HA:
8467 if (ok_tprel)
8468 /* GD -> LE */
8469 tls_set = 0;
8470 else
8471 /* GD -> IE */
8472 tls_set = TLS_TLS | TLS_TPRELGD;
8473 tls_clear = TLS_GD;
8474 tls_type = TLS_TLS | TLS_GD;
8475 break;
8476
8477 case R_PPC64_GOT_TPREL16_DS:
8478 case R_PPC64_GOT_TPREL16_LO_DS:
8479 case R_PPC64_GOT_TPREL16_HI:
8480 case R_PPC64_GOT_TPREL16_HA:
8481 if (ok_tprel)
8482 {
8483 /* IE -> LE */
8484 tls_set = 0;
8485 tls_clear = TLS_TPREL;
8486 tls_type = TLS_TLS | TLS_TPREL;
8487 break;
8488 }
8489 continue;
8490
8491 case R_PPC64_TLSGD:
8492 case R_PPC64_TLSLD:
8493 found_tls_get_addr_arg = 1;
8494 /* Fall thru */
8495
8496 case R_PPC64_TLS:
8497 case R_PPC64_TOC16:
8498 case R_PPC64_TOC16_LO:
8499 if (sym_sec == NULL || sym_sec != toc)
8500 continue;
8501
8502 /* Mark this toc entry as referenced by a TLS
8503 code sequence. We can do that now in the
8504 case of R_PPC64_TLS, and after checking for
8505 tls_get_addr for the TOC16 relocs. */
8506 if (toc_ref == NULL)
8507 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8508 if (toc_ref == NULL)
8509 goto err_free_rel;
8510
8511 if (h != NULL)
8512 value = h->root.u.def.value;
8513 else
8514 value = sym->st_value;
8515 value += rel->r_addend;
8516 if (value % 8 != 0)
8517 continue;
8518 BFD_ASSERT (value < toc->size
8519 && toc->output_offset % 8 == 0);
8520 toc_ref_index = (value + toc->output_offset) / 8;
8521 if (r_type == R_PPC64_TLS
8522 || r_type == R_PPC64_TLSGD
8523 || r_type == R_PPC64_TLSLD)
8524 {
8525 toc_ref[toc_ref_index] = 1;
8526 continue;
8527 }
8528
8529 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8530 continue;
8531
8532 tls_set = 0;
8533 tls_clear = 0;
8534 expecting_tls_get_addr = 2;
8535 break;
8536
8537 case R_PPC64_TPREL64:
8538 if (pass == 0
8539 || sec != toc
8540 || toc_ref == NULL
8541 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8542 continue;
8543 if (ok_tprel)
8544 {
8545 /* IE -> LE */
8546 tls_set = TLS_EXPLICIT;
8547 tls_clear = TLS_TPREL;
8548 break;
8549 }
8550 continue;
8551
8552 case R_PPC64_DTPMOD64:
8553 if (pass == 0
8554 || sec != toc
8555 || toc_ref == NULL
8556 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8557 continue;
8558 if (rel + 1 < relend
8559 && (rel[1].r_info
8560 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8561 && rel[1].r_offset == rel->r_offset + 8)
8562 {
8563 if (ok_tprel)
8564 /* GD -> LE */
8565 tls_set = TLS_EXPLICIT | TLS_GD;
8566 else
8567 /* GD -> IE */
8568 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8569 tls_clear = TLS_GD;
8570 }
8571 else
8572 {
8573 if (!is_local)
8574 continue;
8575
8576 /* LD -> LE */
8577 tls_set = TLS_EXPLICIT;
8578 tls_clear = TLS_LD;
8579 }
8580 break;
8581
8582 default:
8583 continue;
8584 }
8585
8586 if (pass == 0)
8587 {
8588 if (!expecting_tls_get_addr
8589 || !sec->has_tls_get_addr_call)
8590 continue;
8591
8592 if (rel + 1 < relend
8593 && branch_reloc_hash_match (ibfd, rel + 1,
8594 htab->tls_get_addr,
8595 htab->tls_get_addr_fd))
8596 {
8597 if (expecting_tls_get_addr == 2)
8598 {
8599 /* Check for toc tls entries. */
8600 unsigned char *toc_tls;
8601 int retval;
8602
8603 retval = get_tls_mask (&toc_tls, NULL, NULL,
8604 &locsyms,
8605 rel, ibfd);
8606 if (retval == 0)
8607 goto err_free_rel;
8608 if (toc_tls != NULL)
8609 {
8610 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8611 found_tls_get_addr_arg = 1;
8612 if (retval > 1)
8613 toc_ref[toc_ref_index] = 1;
8614 }
8615 }
8616 continue;
8617 }
8618
8619 if (expecting_tls_get_addr != 1)
8620 continue;
8621
8622 /* Uh oh, we didn't find the expected call. We
8623 could just mark this symbol to exclude it
8624 from tls optimization but it's safer to skip
8625 the entire optimization. */
8626 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8627 "TLS optimization disabled\n"),
8628 ibfd, sec, rel->r_offset);
8629 ret = TRUE;
8630 goto err_free_rel;
8631 }
8632
8633 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8634 {
8635 struct plt_entry *ent;
8636 for (ent = htab->tls_get_addr->elf.plt.plist;
8637 ent != NULL;
8638 ent = ent->next)
8639 if (ent->addend == 0)
8640 {
8641 if (ent->plt.refcount > 0)
8642 {
8643 ent->plt.refcount -= 1;
8644 expecting_tls_get_addr = 0;
8645 }
8646 break;
8647 }
8648 }
8649
8650 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8651 {
8652 struct plt_entry *ent;
8653 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8654 ent != NULL;
8655 ent = ent->next)
8656 if (ent->addend == 0)
8657 {
8658 if (ent->plt.refcount > 0)
8659 ent->plt.refcount -= 1;
8660 break;
8661 }
8662 }
8663
8664 if (tls_clear == 0)
8665 continue;
8666
8667 if ((tls_set & TLS_EXPLICIT) == 0)
8668 {
8669 struct got_entry *ent;
8670
8671 /* Adjust got entry for this reloc. */
8672 if (h != NULL)
8673 ent = h->got.glist;
8674 else
8675 ent = elf_local_got_ents (ibfd)[r_symndx];
8676
8677 for (; ent != NULL; ent = ent->next)
8678 if (ent->addend == rel->r_addend
8679 && ent->owner == ibfd
8680 && ent->tls_type == tls_type)
8681 break;
8682 if (ent == NULL)
8683 abort ();
8684
8685 if (tls_set == 0)
8686 {
8687 /* We managed to get rid of a got entry. */
8688 if (ent->got.refcount > 0)
8689 ent->got.refcount -= 1;
8690 }
8691 }
8692 else
8693 {
8694 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8695 we'll lose one or two dyn relocs. */
8696 if (!dec_dynrel_count (rel->r_info, sec, info,
8697 NULL, h, sym))
8698 return FALSE;
8699
8700 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8701 {
8702 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8703 NULL, h, sym))
8704 return FALSE;
8705 }
8706 }
8707
8708 *tls_mask |= tls_set;
8709 *tls_mask &= ~tls_clear;
8710 }
8711
8712 if (elf_section_data (sec)->relocs != relstart)
8713 free (relstart);
8714 }
8715
8716 if (locsyms != NULL
8717 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8718 {
8719 if (!info->keep_memory)
8720 free (locsyms);
8721 else
8722 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8723 }
8724 }
8725
8726 if (toc_ref != NULL)
8727 free (toc_ref);
8728 return TRUE;
8729 }
8730
8731 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8732 the values of any global symbols in a toc section that has been
8733 edited. Globals in toc sections should be a rarity, so this function
8734 sets a flag if any are found in toc sections other than the one just
8735 edited, so that futher hash table traversals can be avoided. */
8736
8737 struct adjust_toc_info
8738 {
8739 asection *toc;
8740 unsigned long *skip;
8741 bfd_boolean global_toc_syms;
8742 };
8743
8744 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8745
8746 static bfd_boolean
8747 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8748 {
8749 struct ppc_link_hash_entry *eh;
8750 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8751 unsigned long i;
8752
8753 if (h->root.type != bfd_link_hash_defined
8754 && h->root.type != bfd_link_hash_defweak)
8755 return TRUE;
8756
8757 eh = (struct ppc_link_hash_entry *) h;
8758 if (eh->adjust_done)
8759 return TRUE;
8760
8761 if (eh->elf.root.u.def.section == toc_inf->toc)
8762 {
8763 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8764 i = toc_inf->toc->rawsize >> 3;
8765 else
8766 i = eh->elf.root.u.def.value >> 3;
8767
8768 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8769 {
8770 (*_bfd_error_handler)
8771 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8772 do
8773 ++i;
8774 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8775 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8776 }
8777
8778 eh->elf.root.u.def.value -= toc_inf->skip[i];
8779 eh->adjust_done = 1;
8780 }
8781 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8782 toc_inf->global_toc_syms = TRUE;
8783
8784 return TRUE;
8785 }
8786
8787 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8788
8789 static bfd_boolean
8790 ok_lo_toc_insn (unsigned int insn)
8791 {
8792 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8793 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8794 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8795 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8796 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8797 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8798 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8799 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8800 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8801 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8802 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8803 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8804 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8805 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8806 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8807 && (insn & 3) != 1)
8808 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8809 && ((insn & 3) == 0 || (insn & 3) == 3))
8810 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8811 }
8812
8813 /* Examine all relocs referencing .toc sections in order to remove
8814 unused .toc entries. */
8815
8816 bfd_boolean
8817 ppc64_elf_edit_toc (struct bfd_link_info *info)
8818 {
8819 bfd *ibfd;
8820 struct adjust_toc_info toc_inf;
8821 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8822
8823 htab->do_toc_opt = 1;
8824 toc_inf.global_toc_syms = TRUE;
8825 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8826 {
8827 asection *toc, *sec;
8828 Elf_Internal_Shdr *symtab_hdr;
8829 Elf_Internal_Sym *local_syms;
8830 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8831 unsigned long *skip, *drop;
8832 unsigned char *used;
8833 unsigned char *keep, last, some_unused;
8834
8835 if (!is_ppc64_elf (ibfd))
8836 continue;
8837
8838 toc = bfd_get_section_by_name (ibfd, ".toc");
8839 if (toc == NULL
8840 || toc->size == 0
8841 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8842 || discarded_section (toc))
8843 continue;
8844
8845 toc_relocs = NULL;
8846 local_syms = NULL;
8847 symtab_hdr = &elf_symtab_hdr (ibfd);
8848
8849 /* Look at sections dropped from the final link. */
8850 skip = NULL;
8851 relstart = NULL;
8852 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8853 {
8854 if (sec->reloc_count == 0
8855 || !discarded_section (sec)
8856 || get_opd_info (sec)
8857 || (sec->flags & SEC_ALLOC) == 0
8858 || (sec->flags & SEC_DEBUGGING) != 0)
8859 continue;
8860
8861 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8862 if (relstart == NULL)
8863 goto error_ret;
8864
8865 /* Run through the relocs to see which toc entries might be
8866 unused. */
8867 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8868 {
8869 enum elf_ppc64_reloc_type r_type;
8870 unsigned long r_symndx;
8871 asection *sym_sec;
8872 struct elf_link_hash_entry *h;
8873 Elf_Internal_Sym *sym;
8874 bfd_vma val;
8875
8876 r_type = ELF64_R_TYPE (rel->r_info);
8877 switch (r_type)
8878 {
8879 default:
8880 continue;
8881
8882 case R_PPC64_TOC16:
8883 case R_PPC64_TOC16_LO:
8884 case R_PPC64_TOC16_HI:
8885 case R_PPC64_TOC16_HA:
8886 case R_PPC64_TOC16_DS:
8887 case R_PPC64_TOC16_LO_DS:
8888 break;
8889 }
8890
8891 r_symndx = ELF64_R_SYM (rel->r_info);
8892 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8893 r_symndx, ibfd))
8894 goto error_ret;
8895
8896 if (sym_sec != toc)
8897 continue;
8898
8899 if (h != NULL)
8900 val = h->root.u.def.value;
8901 else
8902 val = sym->st_value;
8903 val += rel->r_addend;
8904
8905 if (val >= toc->size)
8906 continue;
8907
8908 /* Anything in the toc ought to be aligned to 8 bytes.
8909 If not, don't mark as unused. */
8910 if (val & 7)
8911 continue;
8912
8913 if (skip == NULL)
8914 {
8915 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8916 if (skip == NULL)
8917 goto error_ret;
8918 }
8919
8920 skip[val >> 3] = ref_from_discarded;
8921 }
8922
8923 if (elf_section_data (sec)->relocs != relstart)
8924 free (relstart);
8925 }
8926
8927 /* For largetoc loads of address constants, we can convert
8928 . addis rx,2,addr@got@ha
8929 . ld ry,addr@got@l(rx)
8930 to
8931 . addis rx,2,addr@toc@ha
8932 . addi ry,rx,addr@toc@l
8933 when addr is within 2G of the toc pointer. This then means
8934 that the word storing "addr" in the toc is no longer needed. */
8935
8936 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8937 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8938 && toc->reloc_count != 0)
8939 {
8940 /* Read toc relocs. */
8941 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8942 info->keep_memory);
8943 if (toc_relocs == NULL)
8944 goto error_ret;
8945
8946 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8947 {
8948 enum elf_ppc64_reloc_type r_type;
8949 unsigned long r_symndx;
8950 asection *sym_sec;
8951 struct elf_link_hash_entry *h;
8952 Elf_Internal_Sym *sym;
8953 bfd_vma val, addr;
8954
8955 r_type = ELF64_R_TYPE (rel->r_info);
8956 if (r_type != R_PPC64_ADDR64)
8957 continue;
8958
8959 r_symndx = ELF64_R_SYM (rel->r_info);
8960 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8961 r_symndx, ibfd))
8962 goto error_ret;
8963
8964 if (sym_sec == NULL
8965 || sym_sec->output_section == NULL
8966 || discarded_section (sym_sec))
8967 continue;
8968
8969 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8970 continue;
8971
8972 if (h != NULL)
8973 {
8974 if (h->type == STT_GNU_IFUNC)
8975 continue;
8976 val = h->root.u.def.value;
8977 }
8978 else
8979 {
8980 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8981 continue;
8982 val = sym->st_value;
8983 }
8984 val += rel->r_addend;
8985 val += sym_sec->output_section->vma + sym_sec->output_offset;
8986
8987 /* We don't yet know the exact toc pointer value, but we
8988 know it will be somewhere in the toc section. Don't
8989 optimize if the difference from any possible toc
8990 pointer is outside [ff..f80008000, 7fff7fff]. */
8991 addr = toc->output_section->vma + TOC_BASE_OFF;
8992 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8993 continue;
8994
8995 addr = toc->output_section->vma + toc->output_section->rawsize;
8996 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8997 continue;
8998
8999 if (skip == NULL)
9000 {
9001 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9002 if (skip == NULL)
9003 goto error_ret;
9004 }
9005
9006 skip[rel->r_offset >> 3]
9007 |= can_optimize | ((rel - toc_relocs) << 2);
9008 }
9009 }
9010
9011 if (skip == NULL)
9012 continue;
9013
9014 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9015 if (used == NULL)
9016 {
9017 error_ret:
9018 if (local_syms != NULL
9019 && symtab_hdr->contents != (unsigned char *) local_syms)
9020 free (local_syms);
9021 if (sec != NULL
9022 && relstart != NULL
9023 && elf_section_data (sec)->relocs != relstart)
9024 free (relstart);
9025 if (toc_relocs != NULL
9026 && elf_section_data (toc)->relocs != toc_relocs)
9027 free (toc_relocs);
9028 if (skip != NULL)
9029 free (skip);
9030 return FALSE;
9031 }
9032
9033 /* Now check all kept sections that might reference the toc.
9034 Check the toc itself last. */
9035 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9036 : ibfd->sections);
9037 sec != NULL;
9038 sec = (sec == toc ? NULL
9039 : sec->next == NULL ? toc
9040 : sec->next == toc && toc->next ? toc->next
9041 : sec->next))
9042 {
9043 int repeat;
9044
9045 if (sec->reloc_count == 0
9046 || discarded_section (sec)
9047 || get_opd_info (sec)
9048 || (sec->flags & SEC_ALLOC) == 0
9049 || (sec->flags & SEC_DEBUGGING) != 0)
9050 continue;
9051
9052 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9053 info->keep_memory);
9054 if (relstart == NULL)
9055 {
9056 free (used);
9057 goto error_ret;
9058 }
9059
9060 /* Mark toc entries referenced as used. */
9061 do
9062 {
9063 repeat = 0;
9064 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9065 {
9066 enum elf_ppc64_reloc_type r_type;
9067 unsigned long r_symndx;
9068 asection *sym_sec;
9069 struct elf_link_hash_entry *h;
9070 Elf_Internal_Sym *sym;
9071 bfd_vma val;
9072 enum {no_check, check_lo, check_ha} insn_check;
9073
9074 r_type = ELF64_R_TYPE (rel->r_info);
9075 switch (r_type)
9076 {
9077 default:
9078 insn_check = no_check;
9079 break;
9080
9081 case R_PPC64_GOT_TLSLD16_HA:
9082 case R_PPC64_GOT_TLSGD16_HA:
9083 case R_PPC64_GOT_TPREL16_HA:
9084 case R_PPC64_GOT_DTPREL16_HA:
9085 case R_PPC64_GOT16_HA:
9086 case R_PPC64_TOC16_HA:
9087 insn_check = check_ha;
9088 break;
9089
9090 case R_PPC64_GOT_TLSLD16_LO:
9091 case R_PPC64_GOT_TLSGD16_LO:
9092 case R_PPC64_GOT_TPREL16_LO_DS:
9093 case R_PPC64_GOT_DTPREL16_LO_DS:
9094 case R_PPC64_GOT16_LO:
9095 case R_PPC64_GOT16_LO_DS:
9096 case R_PPC64_TOC16_LO:
9097 case R_PPC64_TOC16_LO_DS:
9098 insn_check = check_lo;
9099 break;
9100 }
9101
9102 if (insn_check != no_check)
9103 {
9104 bfd_vma off = rel->r_offset & ~3;
9105 unsigned char buf[4];
9106 unsigned int insn;
9107
9108 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9109 {
9110 free (used);
9111 goto error_ret;
9112 }
9113 insn = bfd_get_32 (ibfd, buf);
9114 if (insn_check == check_lo
9115 ? !ok_lo_toc_insn (insn)
9116 : ((insn & ((0x3f << 26) | 0x1f << 16))
9117 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9118 {
9119 char str[12];
9120
9121 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9122 sprintf (str, "%#08x", insn);
9123 info->callbacks->einfo
9124 (_("%P: %H: toc optimization is not supported for"
9125 " %s instruction.\n"),
9126 ibfd, sec, rel->r_offset & ~3, str);
9127 }
9128 }
9129
9130 switch (r_type)
9131 {
9132 case R_PPC64_TOC16:
9133 case R_PPC64_TOC16_LO:
9134 case R_PPC64_TOC16_HI:
9135 case R_PPC64_TOC16_HA:
9136 case R_PPC64_TOC16_DS:
9137 case R_PPC64_TOC16_LO_DS:
9138 /* In case we're taking addresses of toc entries. */
9139 case R_PPC64_ADDR64:
9140 break;
9141
9142 default:
9143 continue;
9144 }
9145
9146 r_symndx = ELF64_R_SYM (rel->r_info);
9147 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9148 r_symndx, ibfd))
9149 {
9150 free (used);
9151 goto error_ret;
9152 }
9153
9154 if (sym_sec != toc)
9155 continue;
9156
9157 if (h != NULL)
9158 val = h->root.u.def.value;
9159 else
9160 val = sym->st_value;
9161 val += rel->r_addend;
9162
9163 if (val >= toc->size)
9164 continue;
9165
9166 if ((skip[val >> 3] & can_optimize) != 0)
9167 {
9168 bfd_vma off;
9169 unsigned char opc;
9170
9171 switch (r_type)
9172 {
9173 case R_PPC64_TOC16_HA:
9174 break;
9175
9176 case R_PPC64_TOC16_LO_DS:
9177 off = rel->r_offset;
9178 off += (bfd_big_endian (ibfd) ? -2 : 3);
9179 if (!bfd_get_section_contents (ibfd, sec, &opc,
9180 off, 1))
9181 {
9182 free (used);
9183 goto error_ret;
9184 }
9185 if ((opc & (0x3f << 2)) == (58u << 2))
9186 break;
9187 /* Fall thru */
9188
9189 default:
9190 /* Wrong sort of reloc, or not a ld. We may
9191 as well clear ref_from_discarded too. */
9192 skip[val >> 3] = 0;
9193 }
9194 }
9195
9196 if (sec != toc)
9197 used[val >> 3] = 1;
9198 /* For the toc section, we only mark as used if this
9199 entry itself isn't unused. */
9200 else if ((used[rel->r_offset >> 3]
9201 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9202 && !used[val >> 3])
9203 {
9204 /* Do all the relocs again, to catch reference
9205 chains. */
9206 repeat = 1;
9207 used[val >> 3] = 1;
9208 }
9209 }
9210 }
9211 while (repeat);
9212
9213 if (elf_section_data (sec)->relocs != relstart)
9214 free (relstart);
9215 }
9216
9217 /* Merge the used and skip arrays. Assume that TOC
9218 doublewords not appearing as either used or unused belong
9219 to to an entry more than one doubleword in size. */
9220 for (drop = skip, keep = used, last = 0, some_unused = 0;
9221 drop < skip + (toc->size + 7) / 8;
9222 ++drop, ++keep)
9223 {
9224 if (*keep)
9225 {
9226 *drop &= ~ref_from_discarded;
9227 if ((*drop & can_optimize) != 0)
9228 some_unused = 1;
9229 last = 0;
9230 }
9231 else if ((*drop & ref_from_discarded) != 0)
9232 {
9233 some_unused = 1;
9234 last = ref_from_discarded;
9235 }
9236 else
9237 *drop = last;
9238 }
9239
9240 free (used);
9241
9242 if (some_unused)
9243 {
9244 bfd_byte *contents, *src;
9245 unsigned long off;
9246 Elf_Internal_Sym *sym;
9247 bfd_boolean local_toc_syms = FALSE;
9248
9249 /* Shuffle the toc contents, and at the same time convert the
9250 skip array from booleans into offsets. */
9251 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9252 goto error_ret;
9253
9254 elf_section_data (toc)->this_hdr.contents = contents;
9255
9256 for (src = contents, off = 0, drop = skip;
9257 src < contents + toc->size;
9258 src += 8, ++drop)
9259 {
9260 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9261 off += 8;
9262 else if (off != 0)
9263 {
9264 *drop = off;
9265 memcpy (src - off, src, 8);
9266 }
9267 }
9268 *drop = off;
9269 toc->rawsize = toc->size;
9270 toc->size = src - contents - off;
9271
9272 /* Adjust addends for relocs against the toc section sym,
9273 and optimize any accesses we can. */
9274 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9275 {
9276 if (sec->reloc_count == 0
9277 || discarded_section (sec))
9278 continue;
9279
9280 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9281 info->keep_memory);
9282 if (relstart == NULL)
9283 goto error_ret;
9284
9285 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9286 {
9287 enum elf_ppc64_reloc_type r_type;
9288 unsigned long r_symndx;
9289 asection *sym_sec;
9290 struct elf_link_hash_entry *h;
9291 bfd_vma val;
9292
9293 r_type = ELF64_R_TYPE (rel->r_info);
9294 switch (r_type)
9295 {
9296 default:
9297 continue;
9298
9299 case R_PPC64_TOC16:
9300 case R_PPC64_TOC16_LO:
9301 case R_PPC64_TOC16_HI:
9302 case R_PPC64_TOC16_HA:
9303 case R_PPC64_TOC16_DS:
9304 case R_PPC64_TOC16_LO_DS:
9305 case R_PPC64_ADDR64:
9306 break;
9307 }
9308
9309 r_symndx = ELF64_R_SYM (rel->r_info);
9310 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9311 r_symndx, ibfd))
9312 goto error_ret;
9313
9314 if (sym_sec != toc)
9315 continue;
9316
9317 if (h != NULL)
9318 val = h->root.u.def.value;
9319 else
9320 {
9321 val = sym->st_value;
9322 if (val != 0)
9323 local_toc_syms = TRUE;
9324 }
9325
9326 val += rel->r_addend;
9327
9328 if (val > toc->rawsize)
9329 val = toc->rawsize;
9330 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9331 continue;
9332 else if ((skip[val >> 3] & can_optimize) != 0)
9333 {
9334 Elf_Internal_Rela *tocrel
9335 = toc_relocs + (skip[val >> 3] >> 2);
9336 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9337
9338 switch (r_type)
9339 {
9340 case R_PPC64_TOC16_HA:
9341 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9342 break;
9343
9344 case R_PPC64_TOC16_LO_DS:
9345 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9346 break;
9347
9348 default:
9349 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9350 ppc_howto_init ();
9351 info->callbacks->einfo
9352 (_("%P: %H: %s references "
9353 "optimized away TOC entry\n"),
9354 ibfd, sec, rel->r_offset,
9355 ppc64_elf_howto_table[r_type]->name);
9356 bfd_set_error (bfd_error_bad_value);
9357 goto error_ret;
9358 }
9359 rel->r_addend = tocrel->r_addend;
9360 elf_section_data (sec)->relocs = relstart;
9361 continue;
9362 }
9363
9364 if (h != NULL || sym->st_value != 0)
9365 continue;
9366
9367 rel->r_addend -= skip[val >> 3];
9368 elf_section_data (sec)->relocs = relstart;
9369 }
9370
9371 if (elf_section_data (sec)->relocs != relstart)
9372 free (relstart);
9373 }
9374
9375 /* We shouldn't have local or global symbols defined in the TOC,
9376 but handle them anyway. */
9377 if (local_syms != NULL)
9378 for (sym = local_syms;
9379 sym < local_syms + symtab_hdr->sh_info;
9380 ++sym)
9381 if (sym->st_value != 0
9382 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9383 {
9384 unsigned long i;
9385
9386 if (sym->st_value > toc->rawsize)
9387 i = toc->rawsize >> 3;
9388 else
9389 i = sym->st_value >> 3;
9390
9391 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9392 {
9393 if (local_toc_syms)
9394 (*_bfd_error_handler)
9395 (_("%s defined on removed toc entry"),
9396 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9397 do
9398 ++i;
9399 while ((skip[i] & (ref_from_discarded | can_optimize)));
9400 sym->st_value = (bfd_vma) i << 3;
9401 }
9402
9403 sym->st_value -= skip[i];
9404 symtab_hdr->contents = (unsigned char *) local_syms;
9405 }
9406
9407 /* Adjust any global syms defined in this toc input section. */
9408 if (toc_inf.global_toc_syms)
9409 {
9410 toc_inf.toc = toc;
9411 toc_inf.skip = skip;
9412 toc_inf.global_toc_syms = FALSE;
9413 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9414 &toc_inf);
9415 }
9416
9417 if (toc->reloc_count != 0)
9418 {
9419 Elf_Internal_Shdr *rel_hdr;
9420 Elf_Internal_Rela *wrel;
9421 bfd_size_type sz;
9422
9423 /* Remove unused toc relocs, and adjust those we keep. */
9424 if (toc_relocs == NULL)
9425 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9426 info->keep_memory);
9427 if (toc_relocs == NULL)
9428 goto error_ret;
9429
9430 wrel = toc_relocs;
9431 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9432 if ((skip[rel->r_offset >> 3]
9433 & (ref_from_discarded | can_optimize)) == 0)
9434 {
9435 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9436 wrel->r_info = rel->r_info;
9437 wrel->r_addend = rel->r_addend;
9438 ++wrel;
9439 }
9440 else if (!dec_dynrel_count (rel->r_info, toc, info,
9441 &local_syms, NULL, NULL))
9442 goto error_ret;
9443
9444 elf_section_data (toc)->relocs = toc_relocs;
9445 toc->reloc_count = wrel - toc_relocs;
9446 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9447 sz = rel_hdr->sh_entsize;
9448 rel_hdr->sh_size = toc->reloc_count * sz;
9449 }
9450 }
9451 else if (toc_relocs != NULL
9452 && elf_section_data (toc)->relocs != toc_relocs)
9453 free (toc_relocs);
9454
9455 if (local_syms != NULL
9456 && symtab_hdr->contents != (unsigned char *) local_syms)
9457 {
9458 if (!info->keep_memory)
9459 free (local_syms);
9460 else
9461 symtab_hdr->contents = (unsigned char *) local_syms;
9462 }
9463 free (skip);
9464 }
9465
9466 return TRUE;
9467 }
9468
9469 /* Return true iff input section I references the TOC using
9470 instructions limited to +/-32k offsets. */
9471
9472 bfd_boolean
9473 ppc64_elf_has_small_toc_reloc (asection *i)
9474 {
9475 return (is_ppc64_elf (i->owner)
9476 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9477 }
9478
9479 /* Allocate space for one GOT entry. */
9480
9481 static void
9482 allocate_got (struct elf_link_hash_entry *h,
9483 struct bfd_link_info *info,
9484 struct got_entry *gent)
9485 {
9486 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9487 bfd_boolean dyn;
9488 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9489 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9490 ? 16 : 8);
9491 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9492 ? 2 : 1) * sizeof (Elf64_External_Rela);
9493 asection *got = ppc64_elf_tdata (gent->owner)->got;
9494
9495 gent->got.offset = got->size;
9496 got->size += entsize;
9497
9498 dyn = htab->elf.dynamic_sections_created;
9499 if (h->type == STT_GNU_IFUNC)
9500 {
9501 htab->elf.irelplt->size += rentsize;
9502 htab->got_reli_size += rentsize;
9503 }
9504 else if ((bfd_link_pic (info)
9505 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9506 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9507 || h->root.type != bfd_link_hash_undefweak))
9508 {
9509 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9510 relgot->size += rentsize;
9511 }
9512 }
9513
9514 /* This function merges got entries in the same toc group. */
9515
9516 static void
9517 merge_got_entries (struct got_entry **pent)
9518 {
9519 struct got_entry *ent, *ent2;
9520
9521 for (ent = *pent; ent != NULL; ent = ent->next)
9522 if (!ent->is_indirect)
9523 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9524 if (!ent2->is_indirect
9525 && ent2->addend == ent->addend
9526 && ent2->tls_type == ent->tls_type
9527 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9528 {
9529 ent2->is_indirect = TRUE;
9530 ent2->got.ent = ent;
9531 }
9532 }
9533
9534 /* Allocate space in .plt, .got and associated reloc sections for
9535 dynamic relocs. */
9536
9537 static bfd_boolean
9538 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9539 {
9540 struct bfd_link_info *info;
9541 struct ppc_link_hash_table *htab;
9542 asection *s;
9543 struct ppc_link_hash_entry *eh;
9544 struct elf_dyn_relocs *p;
9545 struct got_entry **pgent, *gent;
9546
9547 if (h->root.type == bfd_link_hash_indirect)
9548 return TRUE;
9549
9550 info = (struct bfd_link_info *) inf;
9551 htab = ppc_hash_table (info);
9552 if (htab == NULL)
9553 return FALSE;
9554
9555 if ((htab->elf.dynamic_sections_created
9556 && h->dynindx != -1
9557 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9558 || h->type == STT_GNU_IFUNC)
9559 {
9560 struct plt_entry *pent;
9561 bfd_boolean doneone = FALSE;
9562 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9563 if (pent->plt.refcount > 0)
9564 {
9565 if (!htab->elf.dynamic_sections_created
9566 || h->dynindx == -1)
9567 {
9568 s = htab->elf.iplt;
9569 pent->plt.offset = s->size;
9570 s->size += PLT_ENTRY_SIZE (htab);
9571 s = htab->elf.irelplt;
9572 }
9573 else
9574 {
9575 /* If this is the first .plt entry, make room for the special
9576 first entry. */
9577 s = htab->elf.splt;
9578 if (s->size == 0)
9579 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9580
9581 pent->plt.offset = s->size;
9582
9583 /* Make room for this entry. */
9584 s->size += PLT_ENTRY_SIZE (htab);
9585
9586 /* Make room for the .glink code. */
9587 s = htab->glink;
9588 if (s->size == 0)
9589 s->size += GLINK_CALL_STUB_SIZE;
9590 if (htab->opd_abi)
9591 {
9592 /* We need bigger stubs past index 32767. */
9593 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9594 s->size += 4;
9595 s->size += 2*4;
9596 }
9597 else
9598 s->size += 4;
9599
9600 /* We also need to make an entry in the .rela.plt section. */
9601 s = htab->elf.srelplt;
9602 }
9603 s->size += sizeof (Elf64_External_Rela);
9604 doneone = TRUE;
9605 }
9606 else
9607 pent->plt.offset = (bfd_vma) -1;
9608 if (!doneone)
9609 {
9610 h->plt.plist = NULL;
9611 h->needs_plt = 0;
9612 }
9613 }
9614 else
9615 {
9616 h->plt.plist = NULL;
9617 h->needs_plt = 0;
9618 }
9619
9620 eh = (struct ppc_link_hash_entry *) h;
9621 /* Run through the TLS GD got entries first if we're changing them
9622 to TPREL. */
9623 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9624 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9625 if (gent->got.refcount > 0
9626 && (gent->tls_type & TLS_GD) != 0)
9627 {
9628 /* This was a GD entry that has been converted to TPREL. If
9629 there happens to be a TPREL entry we can use that one. */
9630 struct got_entry *ent;
9631 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9632 if (ent->got.refcount > 0
9633 && (ent->tls_type & TLS_TPREL) != 0
9634 && ent->addend == gent->addend
9635 && ent->owner == gent->owner)
9636 {
9637 gent->got.refcount = 0;
9638 break;
9639 }
9640
9641 /* If not, then we'll be using our own TPREL entry. */
9642 if (gent->got.refcount != 0)
9643 gent->tls_type = TLS_TLS | TLS_TPREL;
9644 }
9645
9646 /* Remove any list entry that won't generate a word in the GOT before
9647 we call merge_got_entries. Otherwise we risk merging to empty
9648 entries. */
9649 pgent = &h->got.glist;
9650 while ((gent = *pgent) != NULL)
9651 if (gent->got.refcount > 0)
9652 {
9653 if ((gent->tls_type & TLS_LD) != 0
9654 && !h->def_dynamic)
9655 {
9656 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9657 *pgent = gent->next;
9658 }
9659 else
9660 pgent = &gent->next;
9661 }
9662 else
9663 *pgent = gent->next;
9664
9665 if (!htab->do_multi_toc)
9666 merge_got_entries (&h->got.glist);
9667
9668 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9669 if (!gent->is_indirect)
9670 {
9671 /* Make sure this symbol is output as a dynamic symbol.
9672 Undefined weak syms won't yet be marked as dynamic,
9673 nor will all TLS symbols. */
9674 if (h->dynindx == -1
9675 && !h->forced_local
9676 && h->type != STT_GNU_IFUNC
9677 && htab->elf.dynamic_sections_created)
9678 {
9679 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9680 return FALSE;
9681 }
9682
9683 if (!is_ppc64_elf (gent->owner))
9684 abort ();
9685
9686 allocate_got (h, info, gent);
9687 }
9688
9689 if (eh->dyn_relocs == NULL
9690 || (!htab->elf.dynamic_sections_created
9691 && h->type != STT_GNU_IFUNC))
9692 return TRUE;
9693
9694 /* In the shared -Bsymbolic case, discard space allocated for
9695 dynamic pc-relative relocs against symbols which turn out to be
9696 defined in regular objects. For the normal shared case, discard
9697 space for relocs that have become local due to symbol visibility
9698 changes. */
9699
9700 if (bfd_link_pic (info))
9701 {
9702 /* Relocs that use pc_count are those that appear on a call insn,
9703 or certain REL relocs (see must_be_dyn_reloc) that can be
9704 generated via assembly. We want calls to protected symbols to
9705 resolve directly to the function rather than going via the plt.
9706 If people want function pointer comparisons to work as expected
9707 then they should avoid writing weird assembly. */
9708 if (SYMBOL_CALLS_LOCAL (info, h))
9709 {
9710 struct elf_dyn_relocs **pp;
9711
9712 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9713 {
9714 p->count -= p->pc_count;
9715 p->pc_count = 0;
9716 if (p->count == 0)
9717 *pp = p->next;
9718 else
9719 pp = &p->next;
9720 }
9721 }
9722
9723 /* Also discard relocs on undefined weak syms with non-default
9724 visibility. */
9725 if (eh->dyn_relocs != NULL
9726 && h->root.type == bfd_link_hash_undefweak)
9727 {
9728 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9729 eh->dyn_relocs = NULL;
9730
9731 /* Make sure this symbol is output as a dynamic symbol.
9732 Undefined weak syms won't yet be marked as dynamic. */
9733 else if (h->dynindx == -1
9734 && !h->forced_local)
9735 {
9736 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9737 return FALSE;
9738 }
9739 }
9740 }
9741 else if (h->type == STT_GNU_IFUNC)
9742 {
9743 if (!h->non_got_ref)
9744 eh->dyn_relocs = NULL;
9745 }
9746 else if (ELIMINATE_COPY_RELOCS)
9747 {
9748 /* For the non-shared case, discard space for relocs against
9749 symbols which turn out to need copy relocs or are not
9750 dynamic. */
9751
9752 if (!h->non_got_ref
9753 && !h->def_regular)
9754 {
9755 /* Make sure this symbol is output as a dynamic symbol.
9756 Undefined weak syms won't yet be marked as dynamic. */
9757 if (h->dynindx == -1
9758 && !h->forced_local)
9759 {
9760 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9761 return FALSE;
9762 }
9763
9764 /* If that succeeded, we know we'll be keeping all the
9765 relocs. */
9766 if (h->dynindx != -1)
9767 goto keep;
9768 }
9769
9770 eh->dyn_relocs = NULL;
9771
9772 keep: ;
9773 }
9774
9775 /* Finally, allocate space. */
9776 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9777 {
9778 asection *sreloc = elf_section_data (p->sec)->sreloc;
9779 if (eh->elf.type == STT_GNU_IFUNC)
9780 sreloc = htab->elf.irelplt;
9781 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9782 }
9783
9784 return TRUE;
9785 }
9786
9787 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9788 to set up space for global entry stubs. These are put in glink,
9789 after the branch table. */
9790
9791 static bfd_boolean
9792 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9793 {
9794 struct bfd_link_info *info;
9795 struct ppc_link_hash_table *htab;
9796 struct plt_entry *pent;
9797 asection *s;
9798
9799 if (h->root.type == bfd_link_hash_indirect)
9800 return TRUE;
9801
9802 if (!h->pointer_equality_needed)
9803 return TRUE;
9804
9805 if (h->def_regular)
9806 return TRUE;
9807
9808 info = inf;
9809 htab = ppc_hash_table (info);
9810 if (htab == NULL)
9811 return FALSE;
9812
9813 s = htab->glink;
9814 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9815 if (pent->plt.offset != (bfd_vma) -1
9816 && pent->addend == 0)
9817 {
9818 /* For ELFv2, if this symbol is not defined in a regular file
9819 and we are not generating a shared library or pie, then we
9820 need to define the symbol in the executable on a call stub.
9821 This is to avoid text relocations. */
9822 s->size = (s->size + 15) & -16;
9823 h->root.u.def.section = s;
9824 h->root.u.def.value = s->size;
9825 s->size += 16;
9826 break;
9827 }
9828 return TRUE;
9829 }
9830
9831 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9832 read-only sections. */
9833
9834 static bfd_boolean
9835 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9836 {
9837 if (h->root.type == bfd_link_hash_indirect)
9838 return TRUE;
9839
9840 if (readonly_dynrelocs (h))
9841 {
9842 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9843
9844 /* Not an error, just cut short the traversal. */
9845 return FALSE;
9846 }
9847 return TRUE;
9848 }
9849
9850 /* Set the sizes of the dynamic sections. */
9851
9852 static bfd_boolean
9853 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9854 struct bfd_link_info *info)
9855 {
9856 struct ppc_link_hash_table *htab;
9857 bfd *dynobj;
9858 asection *s;
9859 bfd_boolean relocs;
9860 bfd *ibfd;
9861 struct got_entry *first_tlsld;
9862
9863 htab = ppc_hash_table (info);
9864 if (htab == NULL)
9865 return FALSE;
9866
9867 dynobj = htab->elf.dynobj;
9868 if (dynobj == NULL)
9869 abort ();
9870
9871 if (htab->elf.dynamic_sections_created)
9872 {
9873 /* Set the contents of the .interp section to the interpreter. */
9874 if (bfd_link_executable (info) && !info->nointerp)
9875 {
9876 s = bfd_get_linker_section (dynobj, ".interp");
9877 if (s == NULL)
9878 abort ();
9879 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9880 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9881 }
9882 }
9883
9884 /* Set up .got offsets for local syms, and space for local dynamic
9885 relocs. */
9886 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9887 {
9888 struct got_entry **lgot_ents;
9889 struct got_entry **end_lgot_ents;
9890 struct plt_entry **local_plt;
9891 struct plt_entry **end_local_plt;
9892 unsigned char *lgot_masks;
9893 bfd_size_type locsymcount;
9894 Elf_Internal_Shdr *symtab_hdr;
9895
9896 if (!is_ppc64_elf (ibfd))
9897 continue;
9898
9899 for (s = ibfd->sections; s != NULL; s = s->next)
9900 {
9901 struct ppc_dyn_relocs *p;
9902
9903 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9904 {
9905 if (!bfd_is_abs_section (p->sec)
9906 && bfd_is_abs_section (p->sec->output_section))
9907 {
9908 /* Input section has been discarded, either because
9909 it is a copy of a linkonce section or due to
9910 linker script /DISCARD/, so we'll be discarding
9911 the relocs too. */
9912 }
9913 else if (p->count != 0)
9914 {
9915 asection *srel = elf_section_data (p->sec)->sreloc;
9916 if (p->ifunc)
9917 srel = htab->elf.irelplt;
9918 srel->size += p->count * sizeof (Elf64_External_Rela);
9919 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9920 info->flags |= DF_TEXTREL;
9921 }
9922 }
9923 }
9924
9925 lgot_ents = elf_local_got_ents (ibfd);
9926 if (!lgot_ents)
9927 continue;
9928
9929 symtab_hdr = &elf_symtab_hdr (ibfd);
9930 locsymcount = symtab_hdr->sh_info;
9931 end_lgot_ents = lgot_ents + locsymcount;
9932 local_plt = (struct plt_entry **) end_lgot_ents;
9933 end_local_plt = local_plt + locsymcount;
9934 lgot_masks = (unsigned char *) end_local_plt;
9935 s = ppc64_elf_tdata (ibfd)->got;
9936 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9937 {
9938 struct got_entry **pent, *ent;
9939
9940 pent = lgot_ents;
9941 while ((ent = *pent) != NULL)
9942 if (ent->got.refcount > 0)
9943 {
9944 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9945 {
9946 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9947 *pent = ent->next;
9948 }
9949 else
9950 {
9951 unsigned int ent_size = 8;
9952 unsigned int rel_size = sizeof (Elf64_External_Rela);
9953
9954 ent->got.offset = s->size;
9955 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9956 {
9957 ent_size *= 2;
9958 rel_size *= 2;
9959 }
9960 s->size += ent_size;
9961 if ((*lgot_masks & PLT_IFUNC) != 0)
9962 {
9963 htab->elf.irelplt->size += rel_size;
9964 htab->got_reli_size += rel_size;
9965 }
9966 else if (bfd_link_pic (info))
9967 {
9968 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9969 srel->size += rel_size;
9970 }
9971 pent = &ent->next;
9972 }
9973 }
9974 else
9975 *pent = ent->next;
9976 }
9977
9978 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9979 for (; local_plt < end_local_plt; ++local_plt)
9980 {
9981 struct plt_entry *ent;
9982
9983 for (ent = *local_plt; ent != NULL; ent = ent->next)
9984 if (ent->plt.refcount > 0)
9985 {
9986 s = htab->elf.iplt;
9987 ent->plt.offset = s->size;
9988 s->size += PLT_ENTRY_SIZE (htab);
9989
9990 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9991 }
9992 else
9993 ent->plt.offset = (bfd_vma) -1;
9994 }
9995 }
9996
9997 /* Allocate global sym .plt and .got entries, and space for global
9998 sym dynamic relocs. */
9999 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10000 /* Stash the end of glink branch table. */
10001 if (htab->glink != NULL)
10002 htab->glink->rawsize = htab->glink->size;
10003
10004 if (!htab->opd_abi && !bfd_link_pic (info))
10005 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10006
10007 first_tlsld = NULL;
10008 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10009 {
10010 struct got_entry *ent;
10011
10012 if (!is_ppc64_elf (ibfd))
10013 continue;
10014
10015 ent = ppc64_tlsld_got (ibfd);
10016 if (ent->got.refcount > 0)
10017 {
10018 if (!htab->do_multi_toc && first_tlsld != NULL)
10019 {
10020 ent->is_indirect = TRUE;
10021 ent->got.ent = first_tlsld;
10022 }
10023 else
10024 {
10025 if (first_tlsld == NULL)
10026 first_tlsld = ent;
10027 s = ppc64_elf_tdata (ibfd)->got;
10028 ent->got.offset = s->size;
10029 ent->owner = ibfd;
10030 s->size += 16;
10031 if (bfd_link_pic (info))
10032 {
10033 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10034 srel->size += sizeof (Elf64_External_Rela);
10035 }
10036 }
10037 }
10038 else
10039 ent->got.offset = (bfd_vma) -1;
10040 }
10041
10042 /* We now have determined the sizes of the various dynamic sections.
10043 Allocate memory for them. */
10044 relocs = FALSE;
10045 for (s = dynobj->sections; s != NULL; s = s->next)
10046 {
10047 if ((s->flags & SEC_LINKER_CREATED) == 0)
10048 continue;
10049
10050 if (s == htab->brlt || s == htab->relbrlt)
10051 /* These haven't been allocated yet; don't strip. */
10052 continue;
10053 else if (s == htab->elf.sgot
10054 || s == htab->elf.splt
10055 || s == htab->elf.iplt
10056 || s == htab->glink
10057 || s == htab->dynbss)
10058 {
10059 /* Strip this section if we don't need it; see the
10060 comment below. */
10061 }
10062 else if (s == htab->glink_eh_frame)
10063 {
10064 if (!bfd_is_abs_section (s->output_section))
10065 /* Not sized yet. */
10066 continue;
10067 }
10068 else if (CONST_STRNEQ (s->name, ".rela"))
10069 {
10070 if (s->size != 0)
10071 {
10072 if (s != htab->elf.srelplt)
10073 relocs = TRUE;
10074
10075 /* We use the reloc_count field as a counter if we need
10076 to copy relocs into the output file. */
10077 s->reloc_count = 0;
10078 }
10079 }
10080 else
10081 {
10082 /* It's not one of our sections, so don't allocate space. */
10083 continue;
10084 }
10085
10086 if (s->size == 0)
10087 {
10088 /* If we don't need this section, strip it from the
10089 output file. This is mostly to handle .rela.bss and
10090 .rela.plt. We must create both sections in
10091 create_dynamic_sections, because they must be created
10092 before the linker maps input sections to output
10093 sections. The linker does that before
10094 adjust_dynamic_symbol is called, and it is that
10095 function which decides whether anything needs to go
10096 into these sections. */
10097 s->flags |= SEC_EXCLUDE;
10098 continue;
10099 }
10100
10101 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10102 continue;
10103
10104 /* Allocate memory for the section contents. We use bfd_zalloc
10105 here in case unused entries are not reclaimed before the
10106 section's contents are written out. This should not happen,
10107 but this way if it does we get a R_PPC64_NONE reloc in .rela
10108 sections instead of garbage.
10109 We also rely on the section contents being zero when writing
10110 the GOT. */
10111 s->contents = bfd_zalloc (dynobj, s->size);
10112 if (s->contents == NULL)
10113 return FALSE;
10114 }
10115
10116 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10117 {
10118 if (!is_ppc64_elf (ibfd))
10119 continue;
10120
10121 s = ppc64_elf_tdata (ibfd)->got;
10122 if (s != NULL && s != htab->elf.sgot)
10123 {
10124 if (s->size == 0)
10125 s->flags |= SEC_EXCLUDE;
10126 else
10127 {
10128 s->contents = bfd_zalloc (ibfd, s->size);
10129 if (s->contents == NULL)
10130 return FALSE;
10131 }
10132 }
10133 s = ppc64_elf_tdata (ibfd)->relgot;
10134 if (s != NULL)
10135 {
10136 if (s->size == 0)
10137 s->flags |= SEC_EXCLUDE;
10138 else
10139 {
10140 s->contents = bfd_zalloc (ibfd, s->size);
10141 if (s->contents == NULL)
10142 return FALSE;
10143 relocs = TRUE;
10144 s->reloc_count = 0;
10145 }
10146 }
10147 }
10148
10149 if (htab->elf.dynamic_sections_created)
10150 {
10151 bfd_boolean tls_opt;
10152
10153 /* Add some entries to the .dynamic section. We fill in the
10154 values later, in ppc64_elf_finish_dynamic_sections, but we
10155 must add the entries now so that we get the correct size for
10156 the .dynamic section. The DT_DEBUG entry is filled in by the
10157 dynamic linker and used by the debugger. */
10158 #define add_dynamic_entry(TAG, VAL) \
10159 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10160
10161 if (bfd_link_executable (info))
10162 {
10163 if (!add_dynamic_entry (DT_DEBUG, 0))
10164 return FALSE;
10165 }
10166
10167 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10168 {
10169 if (!add_dynamic_entry (DT_PLTGOT, 0)
10170 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10171 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10172 || !add_dynamic_entry (DT_JMPREL, 0)
10173 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10174 return FALSE;
10175 }
10176
10177 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10178 {
10179 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10180 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10181 return FALSE;
10182 }
10183
10184 tls_opt = (htab->params->tls_get_addr_opt
10185 && htab->tls_get_addr_fd != NULL
10186 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10187 if (tls_opt || !htab->opd_abi)
10188 {
10189 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10190 return FALSE;
10191 }
10192
10193 if (relocs)
10194 {
10195 if (!add_dynamic_entry (DT_RELA, 0)
10196 || !add_dynamic_entry (DT_RELASZ, 0)
10197 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10198 return FALSE;
10199
10200 /* If any dynamic relocs apply to a read-only section,
10201 then we need a DT_TEXTREL entry. */
10202 if ((info->flags & DF_TEXTREL) == 0)
10203 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10204
10205 if ((info->flags & DF_TEXTREL) != 0)
10206 {
10207 if (!add_dynamic_entry (DT_TEXTREL, 0))
10208 return FALSE;
10209 }
10210 }
10211 }
10212 #undef add_dynamic_entry
10213
10214 return TRUE;
10215 }
10216
10217 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10218
10219 static bfd_boolean
10220 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10221 {
10222 if (h->plt.plist != NULL
10223 && !h->def_regular
10224 && !h->pointer_equality_needed)
10225 return FALSE;
10226
10227 return _bfd_elf_hash_symbol (h);
10228 }
10229
10230 /* Determine the type of stub needed, if any, for a call. */
10231
10232 static inline enum ppc_stub_type
10233 ppc_type_of_stub (asection *input_sec,
10234 const Elf_Internal_Rela *rel,
10235 struct ppc_link_hash_entry **hash,
10236 struct plt_entry **plt_ent,
10237 bfd_vma destination,
10238 unsigned long local_off)
10239 {
10240 struct ppc_link_hash_entry *h = *hash;
10241 bfd_vma location;
10242 bfd_vma branch_offset;
10243 bfd_vma max_branch_offset;
10244 enum elf_ppc64_reloc_type r_type;
10245
10246 if (h != NULL)
10247 {
10248 struct plt_entry *ent;
10249 struct ppc_link_hash_entry *fdh = h;
10250 if (h->oh != NULL
10251 && h->oh->is_func_descriptor)
10252 {
10253 fdh = ppc_follow_link (h->oh);
10254 *hash = fdh;
10255 }
10256
10257 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10258 if (ent->addend == rel->r_addend
10259 && ent->plt.offset != (bfd_vma) -1)
10260 {
10261 *plt_ent = ent;
10262 return ppc_stub_plt_call;
10263 }
10264
10265 /* Here, we know we don't have a plt entry. If we don't have a
10266 either a defined function descriptor or a defined entry symbol
10267 in a regular object file, then it is pointless trying to make
10268 any other type of stub. */
10269 if (!is_static_defined (&fdh->elf)
10270 && !is_static_defined (&h->elf))
10271 return ppc_stub_none;
10272 }
10273 else if (elf_local_got_ents (input_sec->owner) != NULL)
10274 {
10275 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10276 struct plt_entry **local_plt = (struct plt_entry **)
10277 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10278 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10279
10280 if (local_plt[r_symndx] != NULL)
10281 {
10282 struct plt_entry *ent;
10283
10284 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10285 if (ent->addend == rel->r_addend
10286 && ent->plt.offset != (bfd_vma) -1)
10287 {
10288 *plt_ent = ent;
10289 return ppc_stub_plt_call;
10290 }
10291 }
10292 }
10293
10294 /* Determine where the call point is. */
10295 location = (input_sec->output_offset
10296 + input_sec->output_section->vma
10297 + rel->r_offset);
10298
10299 branch_offset = destination - location;
10300 r_type = ELF64_R_TYPE (rel->r_info);
10301
10302 /* Determine if a long branch stub is needed. */
10303 max_branch_offset = 1 << 25;
10304 if (r_type != R_PPC64_REL24)
10305 max_branch_offset = 1 << 15;
10306
10307 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10308 /* We need a stub. Figure out whether a long_branch or plt_branch
10309 is needed later. */
10310 return ppc_stub_long_branch;
10311
10312 return ppc_stub_none;
10313 }
10314
10315 /* With power7 weakly ordered memory model, it is possible for ld.so
10316 to update a plt entry in one thread and have another thread see a
10317 stale zero toc entry. To avoid this we need some sort of acquire
10318 barrier in the call stub. One solution is to make the load of the
10319 toc word seem to appear to depend on the load of the function entry
10320 word. Another solution is to test for r2 being zero, and branch to
10321 the appropriate glink entry if so.
10322
10323 . fake dep barrier compare
10324 . ld 12,xxx(2) ld 12,xxx(2)
10325 . mtctr 12 mtctr 12
10326 . xor 11,12,12 ld 2,xxx+8(2)
10327 . add 2,2,11 cmpldi 2,0
10328 . ld 2,xxx+8(2) bnectr+
10329 . bctr b <glink_entry>
10330
10331 The solution involving the compare turns out to be faster, so
10332 that's what we use unless the branch won't reach. */
10333
10334 #define ALWAYS_USE_FAKE_DEP 0
10335 #define ALWAYS_EMIT_R2SAVE 0
10336
10337 #define PPC_LO(v) ((v) & 0xffff)
10338 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10339 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10340
10341 static inline unsigned int
10342 plt_stub_size (struct ppc_link_hash_table *htab,
10343 struct ppc_stub_hash_entry *stub_entry,
10344 bfd_vma off)
10345 {
10346 unsigned size = 12;
10347
10348 if (ALWAYS_EMIT_R2SAVE
10349 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10350 size += 4;
10351 if (PPC_HA (off) != 0)
10352 size += 4;
10353 if (htab->opd_abi)
10354 {
10355 size += 4;
10356 if (htab->params->plt_static_chain)
10357 size += 4;
10358 if (htab->params->plt_thread_safe
10359 && htab->elf.dynamic_sections_created
10360 && stub_entry->h != NULL
10361 && stub_entry->h->elf.dynindx != -1)
10362 size += 8;
10363 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10364 size += 4;
10365 }
10366 if (stub_entry->h != NULL
10367 && (stub_entry->h == htab->tls_get_addr_fd
10368 || stub_entry->h == htab->tls_get_addr)
10369 && htab->params->tls_get_addr_opt)
10370 size += 13 * 4;
10371 return size;
10372 }
10373
10374 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10375 then return the padding needed to do so. */
10376 static inline unsigned int
10377 plt_stub_pad (struct ppc_link_hash_table *htab,
10378 struct ppc_stub_hash_entry *stub_entry,
10379 bfd_vma plt_off)
10380 {
10381 int stub_align = 1 << htab->params->plt_stub_align;
10382 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10383 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10384
10385 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10386 > ((stub_size - 1) & -stub_align))
10387 return stub_align - (stub_off & (stub_align - 1));
10388 return 0;
10389 }
10390
10391 /* Build a .plt call stub. */
10392
10393 static inline bfd_byte *
10394 build_plt_stub (struct ppc_link_hash_table *htab,
10395 struct ppc_stub_hash_entry *stub_entry,
10396 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10397 {
10398 bfd *obfd = htab->params->stub_bfd;
10399 bfd_boolean plt_load_toc = htab->opd_abi;
10400 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10401 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10402 && htab->elf.dynamic_sections_created
10403 && stub_entry->h != NULL
10404 && stub_entry->h->elf.dynindx != -1);
10405 bfd_boolean use_fake_dep = plt_thread_safe;
10406 bfd_vma cmp_branch_off = 0;
10407
10408 if (!ALWAYS_USE_FAKE_DEP
10409 && plt_load_toc
10410 && plt_thread_safe
10411 && !((stub_entry->h == htab->tls_get_addr_fd
10412 || stub_entry->h == htab->tls_get_addr)
10413 && htab->params->tls_get_addr_opt))
10414 {
10415 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10416 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10417 / PLT_ENTRY_SIZE (htab));
10418 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10419 bfd_vma to, from;
10420
10421 if (pltindex > 32768)
10422 glinkoff += (pltindex - 32768) * 4;
10423 to = (glinkoff
10424 + htab->glink->output_offset
10425 + htab->glink->output_section->vma);
10426 from = (p - stub_entry->group->stub_sec->contents
10427 + 4 * (ALWAYS_EMIT_R2SAVE
10428 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10429 + 4 * (PPC_HA (offset) != 0)
10430 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10431 != PPC_HA (offset))
10432 + 4 * (plt_static_chain != 0)
10433 + 20
10434 + stub_entry->group->stub_sec->output_offset
10435 + stub_entry->group->stub_sec->output_section->vma);
10436 cmp_branch_off = to - from;
10437 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10438 }
10439
10440 if (PPC_HA (offset) != 0)
10441 {
10442 if (r != NULL)
10443 {
10444 if (ALWAYS_EMIT_R2SAVE
10445 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10446 r[0].r_offset += 4;
10447 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10448 r[1].r_offset = r[0].r_offset + 4;
10449 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10450 r[1].r_addend = r[0].r_addend;
10451 if (plt_load_toc)
10452 {
10453 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10454 {
10455 r[2].r_offset = r[1].r_offset + 4;
10456 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10457 r[2].r_addend = r[0].r_addend;
10458 }
10459 else
10460 {
10461 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10462 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10463 r[2].r_addend = r[0].r_addend + 8;
10464 if (plt_static_chain)
10465 {
10466 r[3].r_offset = r[2].r_offset + 4;
10467 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10468 r[3].r_addend = r[0].r_addend + 16;
10469 }
10470 }
10471 }
10472 }
10473 if (ALWAYS_EMIT_R2SAVE
10474 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10475 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10476 if (plt_load_toc)
10477 {
10478 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10479 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10480 }
10481 else
10482 {
10483 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10484 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10485 }
10486 if (plt_load_toc
10487 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10488 {
10489 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10490 offset = 0;
10491 }
10492 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10493 if (plt_load_toc)
10494 {
10495 if (use_fake_dep)
10496 {
10497 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10498 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10499 }
10500 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10501 if (plt_static_chain)
10502 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10503 }
10504 }
10505 else
10506 {
10507 if (r != NULL)
10508 {
10509 if (ALWAYS_EMIT_R2SAVE
10510 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10511 r[0].r_offset += 4;
10512 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10513 if (plt_load_toc)
10514 {
10515 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10516 {
10517 r[1].r_offset = r[0].r_offset + 4;
10518 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10519 r[1].r_addend = r[0].r_addend;
10520 }
10521 else
10522 {
10523 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10524 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10525 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10526 if (plt_static_chain)
10527 {
10528 r[2].r_offset = r[1].r_offset + 4;
10529 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10530 r[2].r_addend = r[0].r_addend + 8;
10531 }
10532 }
10533 }
10534 }
10535 if (ALWAYS_EMIT_R2SAVE
10536 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10537 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10538 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10539 if (plt_load_toc
10540 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10541 {
10542 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10543 offset = 0;
10544 }
10545 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10546 if (plt_load_toc)
10547 {
10548 if (use_fake_dep)
10549 {
10550 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10551 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10552 }
10553 if (plt_static_chain)
10554 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10555 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10556 }
10557 }
10558 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10559 {
10560 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10561 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10562 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10563 }
10564 else
10565 bfd_put_32 (obfd, BCTR, p), p += 4;
10566 return p;
10567 }
10568
10569 /* Build a special .plt call stub for __tls_get_addr. */
10570
10571 #define LD_R11_0R3 0xe9630000
10572 #define LD_R12_0R3 0xe9830000
10573 #define MR_R0_R3 0x7c601b78
10574 #define CMPDI_R11_0 0x2c2b0000
10575 #define ADD_R3_R12_R13 0x7c6c6a14
10576 #define BEQLR 0x4d820020
10577 #define MR_R3_R0 0x7c030378
10578 #define STD_R11_0R1 0xf9610000
10579 #define BCTRL 0x4e800421
10580 #define LD_R11_0R1 0xe9610000
10581 #define MTLR_R11 0x7d6803a6
10582
10583 static inline bfd_byte *
10584 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10585 struct ppc_stub_hash_entry *stub_entry,
10586 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10587 {
10588 bfd *obfd = htab->params->stub_bfd;
10589
10590 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10591 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10592 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10593 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10594 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10595 bfd_put_32 (obfd, BEQLR, p), p += 4;
10596 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10597 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10598 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10599
10600 if (r != NULL)
10601 r[0].r_offset += 9 * 4;
10602 p = build_plt_stub (htab, stub_entry, p, offset, r);
10603 bfd_put_32 (obfd, BCTRL, p - 4);
10604
10605 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10606 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10607 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10608 bfd_put_32 (obfd, BLR, p), p += 4;
10609
10610 return p;
10611 }
10612
10613 static Elf_Internal_Rela *
10614 get_relocs (asection *sec, int count)
10615 {
10616 Elf_Internal_Rela *relocs;
10617 struct bfd_elf_section_data *elfsec_data;
10618
10619 elfsec_data = elf_section_data (sec);
10620 relocs = elfsec_data->relocs;
10621 if (relocs == NULL)
10622 {
10623 bfd_size_type relsize;
10624 relsize = sec->reloc_count * sizeof (*relocs);
10625 relocs = bfd_alloc (sec->owner, relsize);
10626 if (relocs == NULL)
10627 return NULL;
10628 elfsec_data->relocs = relocs;
10629 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10630 sizeof (Elf_Internal_Shdr));
10631 if (elfsec_data->rela.hdr == NULL)
10632 return NULL;
10633 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10634 * sizeof (Elf64_External_Rela));
10635 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10636 sec->reloc_count = 0;
10637 }
10638 relocs += sec->reloc_count;
10639 sec->reloc_count += count;
10640 return relocs;
10641 }
10642
10643 static bfd_vma
10644 get_r2off (struct bfd_link_info *info,
10645 struct ppc_stub_hash_entry *stub_entry)
10646 {
10647 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10648 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10649
10650 if (r2off == 0)
10651 {
10652 /* Support linking -R objects. Get the toc pointer from the
10653 opd entry. */
10654 char buf[8];
10655 if (!htab->opd_abi)
10656 return r2off;
10657 asection *opd = stub_entry->h->elf.root.u.def.section;
10658 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10659
10660 if (strcmp (opd->name, ".opd") != 0
10661 || opd->reloc_count != 0)
10662 {
10663 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10664 stub_entry->h->elf.root.root.string);
10665 bfd_set_error (bfd_error_bad_value);
10666 return (bfd_vma) -1;
10667 }
10668 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10669 return (bfd_vma) -1;
10670 r2off = bfd_get_64 (opd->owner, buf);
10671 r2off -= elf_gp (info->output_bfd);
10672 }
10673 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10674 return r2off;
10675 }
10676
10677 static bfd_boolean
10678 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10679 {
10680 struct ppc_stub_hash_entry *stub_entry;
10681 struct ppc_branch_hash_entry *br_entry;
10682 struct bfd_link_info *info;
10683 struct ppc_link_hash_table *htab;
10684 bfd_byte *loc;
10685 bfd_byte *p;
10686 bfd_vma dest, off;
10687 int size;
10688 Elf_Internal_Rela *r;
10689 asection *plt;
10690
10691 /* Massage our args to the form they really have. */
10692 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10693 info = in_arg;
10694
10695 htab = ppc_hash_table (info);
10696 if (htab == NULL)
10697 return FALSE;
10698
10699 /* Make a note of the offset within the stubs for this entry. */
10700 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10701 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10702
10703 htab->stub_count[stub_entry->stub_type - 1] += 1;
10704 switch (stub_entry->stub_type)
10705 {
10706 case ppc_stub_long_branch:
10707 case ppc_stub_long_branch_r2off:
10708 /* Branches are relative. This is where we are going to. */
10709 dest = (stub_entry->target_value
10710 + stub_entry->target_section->output_offset
10711 + stub_entry->target_section->output_section->vma);
10712 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10713 off = dest;
10714
10715 /* And this is where we are coming from. */
10716 off -= (stub_entry->stub_offset
10717 + stub_entry->group->stub_sec->output_offset
10718 + stub_entry->group->stub_sec->output_section->vma);
10719
10720 size = 4;
10721 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10722 {
10723 bfd_vma r2off = get_r2off (info, stub_entry);
10724
10725 if (r2off == (bfd_vma) -1)
10726 {
10727 htab->stub_error = TRUE;
10728 return FALSE;
10729 }
10730 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10731 loc += 4;
10732 size = 8;
10733 if (PPC_HA (r2off) != 0)
10734 {
10735 bfd_put_32 (htab->params->stub_bfd,
10736 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10737 loc += 4;
10738 size += 4;
10739 }
10740 if (PPC_LO (r2off) != 0)
10741 {
10742 bfd_put_32 (htab->params->stub_bfd,
10743 ADDI_R2_R2 | PPC_LO (r2off), loc);
10744 loc += 4;
10745 size += 4;
10746 }
10747 off -= size - 4;
10748 }
10749 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10750
10751 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10752 {
10753 info->callbacks->einfo
10754 (_("%P: long branch stub `%s' offset overflow\n"),
10755 stub_entry->root.string);
10756 htab->stub_error = TRUE;
10757 return FALSE;
10758 }
10759
10760 if (info->emitrelocations)
10761 {
10762 r = get_relocs (stub_entry->group->stub_sec, 1);
10763 if (r == NULL)
10764 return FALSE;
10765 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10766 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10767 r->r_addend = dest;
10768 if (stub_entry->h != NULL)
10769 {
10770 struct elf_link_hash_entry **hashes;
10771 unsigned long symndx;
10772 struct ppc_link_hash_entry *h;
10773
10774 hashes = elf_sym_hashes (htab->params->stub_bfd);
10775 if (hashes == NULL)
10776 {
10777 bfd_size_type hsize;
10778
10779 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10780 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10781 if (hashes == NULL)
10782 return FALSE;
10783 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10784 htab->stub_globals = 1;
10785 }
10786 symndx = htab->stub_globals++;
10787 h = stub_entry->h;
10788 hashes[symndx] = &h->elf;
10789 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10790 if (h->oh != NULL && h->oh->is_func)
10791 h = ppc_follow_link (h->oh);
10792 if (h->elf.root.u.def.section != stub_entry->target_section)
10793 /* H is an opd symbol. The addend must be zero. */
10794 r->r_addend = 0;
10795 else
10796 {
10797 off = (h->elf.root.u.def.value
10798 + h->elf.root.u.def.section->output_offset
10799 + h->elf.root.u.def.section->output_section->vma);
10800 r->r_addend -= off;
10801 }
10802 }
10803 }
10804 break;
10805
10806 case ppc_stub_plt_branch:
10807 case ppc_stub_plt_branch_r2off:
10808 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10809 stub_entry->root.string + 9,
10810 FALSE, FALSE);
10811 if (br_entry == NULL)
10812 {
10813 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10814 stub_entry->root.string);
10815 htab->stub_error = TRUE;
10816 return FALSE;
10817 }
10818
10819 dest = (stub_entry->target_value
10820 + stub_entry->target_section->output_offset
10821 + stub_entry->target_section->output_section->vma);
10822 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10823 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10824
10825 bfd_put_64 (htab->brlt->owner, dest,
10826 htab->brlt->contents + br_entry->offset);
10827
10828 if (br_entry->iter == htab->stub_iteration)
10829 {
10830 br_entry->iter = 0;
10831
10832 if (htab->relbrlt != NULL)
10833 {
10834 /* Create a reloc for the branch lookup table entry. */
10835 Elf_Internal_Rela rela;
10836 bfd_byte *rl;
10837
10838 rela.r_offset = (br_entry->offset
10839 + htab->brlt->output_offset
10840 + htab->brlt->output_section->vma);
10841 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10842 rela.r_addend = dest;
10843
10844 rl = htab->relbrlt->contents;
10845 rl += (htab->relbrlt->reloc_count++
10846 * sizeof (Elf64_External_Rela));
10847 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10848 }
10849 else if (info->emitrelocations)
10850 {
10851 r = get_relocs (htab->brlt, 1);
10852 if (r == NULL)
10853 return FALSE;
10854 /* brlt, being SEC_LINKER_CREATED does not go through the
10855 normal reloc processing. Symbols and offsets are not
10856 translated from input file to output file form, so
10857 set up the offset per the output file. */
10858 r->r_offset = (br_entry->offset
10859 + htab->brlt->output_offset
10860 + htab->brlt->output_section->vma);
10861 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10862 r->r_addend = dest;
10863 }
10864 }
10865
10866 dest = (br_entry->offset
10867 + htab->brlt->output_offset
10868 + htab->brlt->output_section->vma);
10869
10870 off = (dest
10871 - elf_gp (htab->brlt->output_section->owner)
10872 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10873
10874 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10875 {
10876 info->callbacks->einfo
10877 (_("%P: linkage table error against `%T'\n"),
10878 stub_entry->root.string);
10879 bfd_set_error (bfd_error_bad_value);
10880 htab->stub_error = TRUE;
10881 return FALSE;
10882 }
10883
10884 if (info->emitrelocations)
10885 {
10886 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10887 if (r == NULL)
10888 return FALSE;
10889 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10890 if (bfd_big_endian (info->output_bfd))
10891 r[0].r_offset += 2;
10892 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10893 r[0].r_offset += 4;
10894 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10895 r[0].r_addend = dest;
10896 if (PPC_HA (off) != 0)
10897 {
10898 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10899 r[1].r_offset = r[0].r_offset + 4;
10900 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10901 r[1].r_addend = r[0].r_addend;
10902 }
10903 }
10904
10905 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10906 {
10907 if (PPC_HA (off) != 0)
10908 {
10909 size = 16;
10910 bfd_put_32 (htab->params->stub_bfd,
10911 ADDIS_R12_R2 | PPC_HA (off), loc);
10912 loc += 4;
10913 bfd_put_32 (htab->params->stub_bfd,
10914 LD_R12_0R12 | PPC_LO (off), loc);
10915 }
10916 else
10917 {
10918 size = 12;
10919 bfd_put_32 (htab->params->stub_bfd,
10920 LD_R12_0R2 | PPC_LO (off), loc);
10921 }
10922 }
10923 else
10924 {
10925 bfd_vma r2off = get_r2off (info, stub_entry);
10926
10927 if (r2off == (bfd_vma) -1)
10928 {
10929 htab->stub_error = TRUE;
10930 return FALSE;
10931 }
10932
10933 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10934 loc += 4;
10935 size = 16;
10936 if (PPC_HA (off) != 0)
10937 {
10938 size += 4;
10939 bfd_put_32 (htab->params->stub_bfd,
10940 ADDIS_R12_R2 | PPC_HA (off), loc);
10941 loc += 4;
10942 bfd_put_32 (htab->params->stub_bfd,
10943 LD_R12_0R12 | PPC_LO (off), loc);
10944 }
10945 else
10946 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10947
10948 if (PPC_HA (r2off) != 0)
10949 {
10950 size += 4;
10951 loc += 4;
10952 bfd_put_32 (htab->params->stub_bfd,
10953 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10954 }
10955 if (PPC_LO (r2off) != 0)
10956 {
10957 size += 4;
10958 loc += 4;
10959 bfd_put_32 (htab->params->stub_bfd,
10960 ADDI_R2_R2 | PPC_LO (r2off), loc);
10961 }
10962 }
10963 loc += 4;
10964 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10965 loc += 4;
10966 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10967 break;
10968
10969 case ppc_stub_plt_call:
10970 case ppc_stub_plt_call_r2save:
10971 if (stub_entry->h != NULL
10972 && stub_entry->h->is_func_descriptor
10973 && stub_entry->h->oh != NULL)
10974 {
10975 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10976
10977 /* If the old-ABI "dot-symbol" is undefined make it weak so
10978 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
10979 if (fh->elf.root.type == bfd_link_hash_undefined)
10980 fh->elf.root.type = bfd_link_hash_undefweak;
10981 /* Stop undo_symbol_twiddle changing it back to undefined. */
10982 fh->was_undefined = 0;
10983 }
10984
10985 /* Now build the stub. */
10986 dest = stub_entry->plt_ent->plt.offset & ~1;
10987 if (dest >= (bfd_vma) -2)
10988 abort ();
10989
10990 plt = htab->elf.splt;
10991 if (!htab->elf.dynamic_sections_created
10992 || stub_entry->h == NULL
10993 || stub_entry->h->elf.dynindx == -1)
10994 plt = htab->elf.iplt;
10995
10996 dest += plt->output_offset + plt->output_section->vma;
10997
10998 if (stub_entry->h == NULL
10999 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11000 {
11001 Elf_Internal_Rela rela;
11002 bfd_byte *rl;
11003
11004 rela.r_offset = dest;
11005 if (htab->opd_abi)
11006 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11007 else
11008 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11009 rela.r_addend = (stub_entry->target_value
11010 + stub_entry->target_section->output_offset
11011 + stub_entry->target_section->output_section->vma);
11012
11013 rl = (htab->elf.irelplt->contents
11014 + (htab->elf.irelplt->reloc_count++
11015 * sizeof (Elf64_External_Rela)));
11016 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11017 stub_entry->plt_ent->plt.offset |= 1;
11018 }
11019
11020 off = (dest
11021 - elf_gp (plt->output_section->owner)
11022 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11023
11024 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11025 {
11026 info->callbacks->einfo
11027 (_("%P: linkage table error against `%T'\n"),
11028 stub_entry->h != NULL
11029 ? stub_entry->h->elf.root.root.string
11030 : "<local sym>");
11031 bfd_set_error (bfd_error_bad_value);
11032 htab->stub_error = TRUE;
11033 return FALSE;
11034 }
11035
11036 if (htab->params->plt_stub_align != 0)
11037 {
11038 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11039
11040 stub_entry->group->stub_sec->size += pad;
11041 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11042 loc += pad;
11043 }
11044
11045 r = NULL;
11046 if (info->emitrelocations)
11047 {
11048 r = get_relocs (stub_entry->group->stub_sec,
11049 ((PPC_HA (off) != 0)
11050 + (htab->opd_abi
11051 ? 2 + (htab->params->plt_static_chain
11052 && PPC_HA (off + 16) == PPC_HA (off))
11053 : 1)));
11054 if (r == NULL)
11055 return FALSE;
11056 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11057 if (bfd_big_endian (info->output_bfd))
11058 r[0].r_offset += 2;
11059 r[0].r_addend = dest;
11060 }
11061 if (stub_entry->h != NULL
11062 && (stub_entry->h == htab->tls_get_addr_fd
11063 || stub_entry->h == htab->tls_get_addr)
11064 && htab->params->tls_get_addr_opt)
11065 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11066 else
11067 p = build_plt_stub (htab, stub_entry, loc, off, r);
11068 size = p - loc;
11069 break;
11070
11071 case ppc_stub_save_res:
11072 return TRUE;
11073
11074 default:
11075 BFD_FAIL ();
11076 return FALSE;
11077 }
11078
11079 stub_entry->group->stub_sec->size += size;
11080
11081 if (htab->params->emit_stub_syms)
11082 {
11083 struct elf_link_hash_entry *h;
11084 size_t len1, len2;
11085 char *name;
11086 const char *const stub_str[] = { "long_branch",
11087 "long_branch_r2off",
11088 "plt_branch",
11089 "plt_branch_r2off",
11090 "plt_call",
11091 "plt_call" };
11092
11093 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11094 len2 = strlen (stub_entry->root.string);
11095 name = bfd_malloc (len1 + len2 + 2);
11096 if (name == NULL)
11097 return FALSE;
11098 memcpy (name, stub_entry->root.string, 9);
11099 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11100 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11101 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11102 if (h == NULL)
11103 return FALSE;
11104 if (h->root.type == bfd_link_hash_new)
11105 {
11106 h->root.type = bfd_link_hash_defined;
11107 h->root.u.def.section = stub_entry->group->stub_sec;
11108 h->root.u.def.value = stub_entry->stub_offset;
11109 h->ref_regular = 1;
11110 h->def_regular = 1;
11111 h->ref_regular_nonweak = 1;
11112 h->forced_local = 1;
11113 h->non_elf = 0;
11114 h->root.linker_def = 1;
11115 }
11116 }
11117
11118 return TRUE;
11119 }
11120
11121 /* As above, but don't actually build the stub. Just bump offset so
11122 we know stub section sizes, and select plt_branch stubs where
11123 long_branch stubs won't do. */
11124
11125 static bfd_boolean
11126 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11127 {
11128 struct ppc_stub_hash_entry *stub_entry;
11129 struct bfd_link_info *info;
11130 struct ppc_link_hash_table *htab;
11131 bfd_vma off;
11132 int size;
11133
11134 /* Massage our args to the form they really have. */
11135 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11136 info = in_arg;
11137
11138 htab = ppc_hash_table (info);
11139 if (htab == NULL)
11140 return FALSE;
11141
11142 if (stub_entry->h != NULL
11143 && stub_entry->h->save_res
11144 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11145 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11146 {
11147 /* Don't make stubs to out-of-line register save/restore
11148 functions. Instead, emit copies of the functions. */
11149 stub_entry->group->needs_save_res = 1;
11150 stub_entry->stub_type = ppc_stub_save_res;
11151 return TRUE;
11152 }
11153
11154 if (stub_entry->stub_type == ppc_stub_plt_call
11155 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11156 {
11157 asection *plt;
11158 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11159 if (off >= (bfd_vma) -2)
11160 abort ();
11161 plt = htab->elf.splt;
11162 if (!htab->elf.dynamic_sections_created
11163 || stub_entry->h == NULL
11164 || stub_entry->h->elf.dynindx == -1)
11165 plt = htab->elf.iplt;
11166 off += (plt->output_offset
11167 + plt->output_section->vma
11168 - elf_gp (plt->output_section->owner)
11169 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11170
11171 size = plt_stub_size (htab, stub_entry, off);
11172 if (htab->params->plt_stub_align)
11173 size += plt_stub_pad (htab, stub_entry, off);
11174 if (info->emitrelocations)
11175 {
11176 stub_entry->group->stub_sec->reloc_count
11177 += ((PPC_HA (off) != 0)
11178 + (htab->opd_abi
11179 ? 2 + (htab->params->plt_static_chain
11180 && PPC_HA (off + 16) == PPC_HA (off))
11181 : 1));
11182 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11183 }
11184 }
11185 else
11186 {
11187 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11188 variants. */
11189 bfd_vma r2off = 0;
11190 bfd_vma local_off = 0;
11191
11192 off = (stub_entry->target_value
11193 + stub_entry->target_section->output_offset
11194 + stub_entry->target_section->output_section->vma);
11195 off -= (stub_entry->group->stub_sec->size
11196 + stub_entry->group->stub_sec->output_offset
11197 + stub_entry->group->stub_sec->output_section->vma);
11198
11199 /* Reset the stub type from the plt variant in case we now
11200 can reach with a shorter stub. */
11201 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11202 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11203
11204 size = 4;
11205 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11206 {
11207 r2off = get_r2off (info, stub_entry);
11208 if (r2off == (bfd_vma) -1)
11209 {
11210 htab->stub_error = TRUE;
11211 return FALSE;
11212 }
11213 size = 8;
11214 if (PPC_HA (r2off) != 0)
11215 size += 4;
11216 if (PPC_LO (r2off) != 0)
11217 size += 4;
11218 off -= size - 4;
11219 }
11220
11221 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11222
11223 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11224 Do the same for -R objects without function descriptors. */
11225 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11226 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11227 && r2off == 0
11228 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11229 {
11230 struct ppc_branch_hash_entry *br_entry;
11231
11232 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11233 stub_entry->root.string + 9,
11234 TRUE, FALSE);
11235 if (br_entry == NULL)
11236 {
11237 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11238 stub_entry->root.string);
11239 htab->stub_error = TRUE;
11240 return FALSE;
11241 }
11242
11243 if (br_entry->iter != htab->stub_iteration)
11244 {
11245 br_entry->iter = htab->stub_iteration;
11246 br_entry->offset = htab->brlt->size;
11247 htab->brlt->size += 8;
11248
11249 if (htab->relbrlt != NULL)
11250 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11251 else if (info->emitrelocations)
11252 {
11253 htab->brlt->reloc_count += 1;
11254 htab->brlt->flags |= SEC_RELOC;
11255 }
11256 }
11257
11258 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11259 off = (br_entry->offset
11260 + htab->brlt->output_offset
11261 + htab->brlt->output_section->vma
11262 - elf_gp (htab->brlt->output_section->owner)
11263 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11264
11265 if (info->emitrelocations)
11266 {
11267 stub_entry->group->stub_sec->reloc_count
11268 += 1 + (PPC_HA (off) != 0);
11269 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11270 }
11271
11272 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11273 {
11274 size = 12;
11275 if (PPC_HA (off) != 0)
11276 size = 16;
11277 }
11278 else
11279 {
11280 size = 16;
11281 if (PPC_HA (off) != 0)
11282 size += 4;
11283
11284 if (PPC_HA (r2off) != 0)
11285 size += 4;
11286 if (PPC_LO (r2off) != 0)
11287 size += 4;
11288 }
11289 }
11290 else if (info->emitrelocations)
11291 {
11292 stub_entry->group->stub_sec->reloc_count += 1;
11293 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11294 }
11295 }
11296
11297 stub_entry->group->stub_sec->size += size;
11298 return TRUE;
11299 }
11300
11301 /* Set up various things so that we can make a list of input sections
11302 for each output section included in the link. Returns -1 on error,
11303 0 when no stubs will be needed, and 1 on success. */
11304
11305 int
11306 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11307 {
11308 unsigned int id;
11309 bfd_size_type amt;
11310 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11311
11312 if (htab == NULL)
11313 return -1;
11314
11315 htab->sec_info_arr_size = bfd_get_next_section_id ();
11316 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11317 htab->sec_info = bfd_zmalloc (amt);
11318 if (htab->sec_info == NULL)
11319 return -1;
11320
11321 /* Set toc_off for com, und, abs and ind sections. */
11322 for (id = 0; id < 3; id++)
11323 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11324
11325 return 1;
11326 }
11327
11328 /* Set up for first pass at multitoc partitioning. */
11329
11330 void
11331 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11332 {
11333 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11334
11335 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11336 htab->toc_bfd = NULL;
11337 htab->toc_first_sec = NULL;
11338 }
11339
11340 /* The linker repeatedly calls this function for each TOC input section
11341 and linker generated GOT section. Group input bfds such that the toc
11342 within a group is less than 64k in size. */
11343
11344 bfd_boolean
11345 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11346 {
11347 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11348 bfd_vma addr, off, limit;
11349
11350 if (htab == NULL)
11351 return FALSE;
11352
11353 if (!htab->second_toc_pass)
11354 {
11355 /* Keep track of the first .toc or .got section for this input bfd. */
11356 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11357
11358 if (new_bfd)
11359 {
11360 htab->toc_bfd = isec->owner;
11361 htab->toc_first_sec = isec;
11362 }
11363
11364 addr = isec->output_offset + isec->output_section->vma;
11365 off = addr - htab->toc_curr;
11366 limit = 0x80008000;
11367 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11368 limit = 0x10000;
11369 if (off + isec->size > limit)
11370 {
11371 addr = (htab->toc_first_sec->output_offset
11372 + htab->toc_first_sec->output_section->vma);
11373 htab->toc_curr = addr;
11374 htab->toc_curr &= -TOC_BASE_ALIGN;
11375 }
11376
11377 /* toc_curr is the base address of this toc group. Set elf_gp
11378 for the input section to be the offset relative to the
11379 output toc base plus 0x8000. Making the input elf_gp an
11380 offset allows us to move the toc as a whole without
11381 recalculating input elf_gp. */
11382 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11383 off += TOC_BASE_OFF;
11384
11385 /* Die if someone uses a linker script that doesn't keep input
11386 file .toc and .got together. */
11387 if (new_bfd
11388 && elf_gp (isec->owner) != 0
11389 && elf_gp (isec->owner) != off)
11390 return FALSE;
11391
11392 elf_gp (isec->owner) = off;
11393 return TRUE;
11394 }
11395
11396 /* During the second pass toc_first_sec points to the start of
11397 a toc group, and toc_curr is used to track the old elf_gp.
11398 We use toc_bfd to ensure we only look at each bfd once. */
11399 if (htab->toc_bfd == isec->owner)
11400 return TRUE;
11401 htab->toc_bfd = isec->owner;
11402
11403 if (htab->toc_first_sec == NULL
11404 || htab->toc_curr != elf_gp (isec->owner))
11405 {
11406 htab->toc_curr = elf_gp (isec->owner);
11407 htab->toc_first_sec = isec;
11408 }
11409 addr = (htab->toc_first_sec->output_offset
11410 + htab->toc_first_sec->output_section->vma);
11411 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11412 elf_gp (isec->owner) = off;
11413
11414 return TRUE;
11415 }
11416
11417 /* Called via elf_link_hash_traverse to merge GOT entries for global
11418 symbol H. */
11419
11420 static bfd_boolean
11421 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11422 {
11423 if (h->root.type == bfd_link_hash_indirect)
11424 return TRUE;
11425
11426 merge_got_entries (&h->got.glist);
11427
11428 return TRUE;
11429 }
11430
11431 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11432 symbol H. */
11433
11434 static bfd_boolean
11435 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11436 {
11437 struct got_entry *gent;
11438
11439 if (h->root.type == bfd_link_hash_indirect)
11440 return TRUE;
11441
11442 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11443 if (!gent->is_indirect)
11444 allocate_got (h, (struct bfd_link_info *) inf, gent);
11445 return TRUE;
11446 }
11447
11448 /* Called on the first multitoc pass after the last call to
11449 ppc64_elf_next_toc_section. This function removes duplicate GOT
11450 entries. */
11451
11452 bfd_boolean
11453 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11454 {
11455 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11456 struct bfd *ibfd, *ibfd2;
11457 bfd_boolean done_something;
11458
11459 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11460
11461 if (!htab->do_multi_toc)
11462 return FALSE;
11463
11464 /* Merge global sym got entries within a toc group. */
11465 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11466
11467 /* And tlsld_got. */
11468 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11469 {
11470 struct got_entry *ent, *ent2;
11471
11472 if (!is_ppc64_elf (ibfd))
11473 continue;
11474
11475 ent = ppc64_tlsld_got (ibfd);
11476 if (!ent->is_indirect
11477 && ent->got.offset != (bfd_vma) -1)
11478 {
11479 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11480 {
11481 if (!is_ppc64_elf (ibfd2))
11482 continue;
11483
11484 ent2 = ppc64_tlsld_got (ibfd2);
11485 if (!ent2->is_indirect
11486 && ent2->got.offset != (bfd_vma) -1
11487 && elf_gp (ibfd2) == elf_gp (ibfd))
11488 {
11489 ent2->is_indirect = TRUE;
11490 ent2->got.ent = ent;
11491 }
11492 }
11493 }
11494 }
11495
11496 /* Zap sizes of got sections. */
11497 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11498 htab->elf.irelplt->size -= htab->got_reli_size;
11499 htab->got_reli_size = 0;
11500
11501 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11502 {
11503 asection *got, *relgot;
11504
11505 if (!is_ppc64_elf (ibfd))
11506 continue;
11507
11508 got = ppc64_elf_tdata (ibfd)->got;
11509 if (got != NULL)
11510 {
11511 got->rawsize = got->size;
11512 got->size = 0;
11513 relgot = ppc64_elf_tdata (ibfd)->relgot;
11514 relgot->rawsize = relgot->size;
11515 relgot->size = 0;
11516 }
11517 }
11518
11519 /* Now reallocate the got, local syms first. We don't need to
11520 allocate section contents again since we never increase size. */
11521 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11522 {
11523 struct got_entry **lgot_ents;
11524 struct got_entry **end_lgot_ents;
11525 struct plt_entry **local_plt;
11526 struct plt_entry **end_local_plt;
11527 unsigned char *lgot_masks;
11528 bfd_size_type locsymcount;
11529 Elf_Internal_Shdr *symtab_hdr;
11530 asection *s;
11531
11532 if (!is_ppc64_elf (ibfd))
11533 continue;
11534
11535 lgot_ents = elf_local_got_ents (ibfd);
11536 if (!lgot_ents)
11537 continue;
11538
11539 symtab_hdr = &elf_symtab_hdr (ibfd);
11540 locsymcount = symtab_hdr->sh_info;
11541 end_lgot_ents = lgot_ents + locsymcount;
11542 local_plt = (struct plt_entry **) end_lgot_ents;
11543 end_local_plt = local_plt + locsymcount;
11544 lgot_masks = (unsigned char *) end_local_plt;
11545 s = ppc64_elf_tdata (ibfd)->got;
11546 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11547 {
11548 struct got_entry *ent;
11549
11550 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11551 {
11552 unsigned int ent_size = 8;
11553 unsigned int rel_size = sizeof (Elf64_External_Rela);
11554
11555 ent->got.offset = s->size;
11556 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11557 {
11558 ent_size *= 2;
11559 rel_size *= 2;
11560 }
11561 s->size += ent_size;
11562 if ((*lgot_masks & PLT_IFUNC) != 0)
11563 {
11564 htab->elf.irelplt->size += rel_size;
11565 htab->got_reli_size += rel_size;
11566 }
11567 else if (bfd_link_pic (info))
11568 {
11569 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11570 srel->size += rel_size;
11571 }
11572 }
11573 }
11574 }
11575
11576 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11577
11578 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11579 {
11580 struct got_entry *ent;
11581
11582 if (!is_ppc64_elf (ibfd))
11583 continue;
11584
11585 ent = ppc64_tlsld_got (ibfd);
11586 if (!ent->is_indirect
11587 && ent->got.offset != (bfd_vma) -1)
11588 {
11589 asection *s = ppc64_elf_tdata (ibfd)->got;
11590 ent->got.offset = s->size;
11591 s->size += 16;
11592 if (bfd_link_pic (info))
11593 {
11594 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11595 srel->size += sizeof (Elf64_External_Rela);
11596 }
11597 }
11598 }
11599
11600 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11601 if (!done_something)
11602 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11603 {
11604 asection *got;
11605
11606 if (!is_ppc64_elf (ibfd))
11607 continue;
11608
11609 got = ppc64_elf_tdata (ibfd)->got;
11610 if (got != NULL)
11611 {
11612 done_something = got->rawsize != got->size;
11613 if (done_something)
11614 break;
11615 }
11616 }
11617
11618 if (done_something)
11619 (*htab->params->layout_sections_again) ();
11620
11621 /* Set up for second pass over toc sections to recalculate elf_gp
11622 on input sections. */
11623 htab->toc_bfd = NULL;
11624 htab->toc_first_sec = NULL;
11625 htab->second_toc_pass = TRUE;
11626 return done_something;
11627 }
11628
11629 /* Called after second pass of multitoc partitioning. */
11630
11631 void
11632 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11633 {
11634 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11635
11636 /* After the second pass, toc_curr tracks the TOC offset used
11637 for code sections below in ppc64_elf_next_input_section. */
11638 htab->toc_curr = TOC_BASE_OFF;
11639 }
11640
11641 /* No toc references were found in ISEC. If the code in ISEC makes no
11642 calls, then there's no need to use toc adjusting stubs when branching
11643 into ISEC. Actually, indirect calls from ISEC are OK as they will
11644 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11645 needed, and 2 if a cyclical call-graph was found but no other reason
11646 for a stub was detected. If called from the top level, a return of
11647 2 means the same as a return of 0. */
11648
11649 static int
11650 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11651 {
11652 int ret;
11653
11654 /* Mark this section as checked. */
11655 isec->call_check_done = 1;
11656
11657 /* We know none of our code bearing sections will need toc stubs. */
11658 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11659 return 0;
11660
11661 if (isec->size == 0)
11662 return 0;
11663
11664 if (isec->output_section == NULL)
11665 return 0;
11666
11667 ret = 0;
11668 if (isec->reloc_count != 0)
11669 {
11670 Elf_Internal_Rela *relstart, *rel;
11671 Elf_Internal_Sym *local_syms;
11672 struct ppc_link_hash_table *htab;
11673
11674 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11675 info->keep_memory);
11676 if (relstart == NULL)
11677 return -1;
11678
11679 /* Look for branches to outside of this section. */
11680 local_syms = NULL;
11681 htab = ppc_hash_table (info);
11682 if (htab == NULL)
11683 return -1;
11684
11685 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11686 {
11687 enum elf_ppc64_reloc_type r_type;
11688 unsigned long r_symndx;
11689 struct elf_link_hash_entry *h;
11690 struct ppc_link_hash_entry *eh;
11691 Elf_Internal_Sym *sym;
11692 asection *sym_sec;
11693 struct _opd_sec_data *opd;
11694 bfd_vma sym_value;
11695 bfd_vma dest;
11696
11697 r_type = ELF64_R_TYPE (rel->r_info);
11698 if (r_type != R_PPC64_REL24
11699 && r_type != R_PPC64_REL14
11700 && r_type != R_PPC64_REL14_BRTAKEN
11701 && r_type != R_PPC64_REL14_BRNTAKEN)
11702 continue;
11703
11704 r_symndx = ELF64_R_SYM (rel->r_info);
11705 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11706 isec->owner))
11707 {
11708 ret = -1;
11709 break;
11710 }
11711
11712 /* Calls to dynamic lib functions go through a plt call stub
11713 that uses r2. */
11714 eh = (struct ppc_link_hash_entry *) h;
11715 if (eh != NULL
11716 && (eh->elf.plt.plist != NULL
11717 || (eh->oh != NULL
11718 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11719 {
11720 ret = 1;
11721 break;
11722 }
11723
11724 if (sym_sec == NULL)
11725 /* Ignore other undefined symbols. */
11726 continue;
11727
11728 /* Assume branches to other sections not included in the
11729 link need stubs too, to cover -R and absolute syms. */
11730 if (sym_sec->output_section == NULL)
11731 {
11732 ret = 1;
11733 break;
11734 }
11735
11736 if (h == NULL)
11737 sym_value = sym->st_value;
11738 else
11739 {
11740 if (h->root.type != bfd_link_hash_defined
11741 && h->root.type != bfd_link_hash_defweak)
11742 abort ();
11743 sym_value = h->root.u.def.value;
11744 }
11745 sym_value += rel->r_addend;
11746
11747 /* If this branch reloc uses an opd sym, find the code section. */
11748 opd = get_opd_info (sym_sec);
11749 if (opd != NULL)
11750 {
11751 if (h == NULL && opd->adjust != NULL)
11752 {
11753 long adjust;
11754
11755 adjust = opd->adjust[OPD_NDX (sym_value)];
11756 if (adjust == -1)
11757 /* Assume deleted functions won't ever be called. */
11758 continue;
11759 sym_value += adjust;
11760 }
11761
11762 dest = opd_entry_value (sym_sec, sym_value,
11763 &sym_sec, NULL, FALSE);
11764 if (dest == (bfd_vma) -1)
11765 continue;
11766 }
11767 else
11768 dest = (sym_value
11769 + sym_sec->output_offset
11770 + sym_sec->output_section->vma);
11771
11772 /* Ignore branch to self. */
11773 if (sym_sec == isec)
11774 continue;
11775
11776 /* If the called function uses the toc, we need a stub. */
11777 if (sym_sec->has_toc_reloc
11778 || sym_sec->makes_toc_func_call)
11779 {
11780 ret = 1;
11781 break;
11782 }
11783
11784 /* Assume any branch that needs a long branch stub might in fact
11785 need a plt_branch stub. A plt_branch stub uses r2. */
11786 else if (dest - (isec->output_offset
11787 + isec->output_section->vma
11788 + rel->r_offset) + (1 << 25)
11789 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11790 ? h->other
11791 : sym->st_other))
11792 {
11793 ret = 1;
11794 break;
11795 }
11796
11797 /* If calling back to a section in the process of being
11798 tested, we can't say for sure that no toc adjusting stubs
11799 are needed, so don't return zero. */
11800 else if (sym_sec->call_check_in_progress)
11801 ret = 2;
11802
11803 /* Branches to another section that itself doesn't have any TOC
11804 references are OK. Recursively call ourselves to check. */
11805 else if (!sym_sec->call_check_done)
11806 {
11807 int recur;
11808
11809 /* Mark current section as indeterminate, so that other
11810 sections that call back to current won't be marked as
11811 known. */
11812 isec->call_check_in_progress = 1;
11813 recur = toc_adjusting_stub_needed (info, sym_sec);
11814 isec->call_check_in_progress = 0;
11815
11816 if (recur != 0)
11817 {
11818 ret = recur;
11819 if (recur != 2)
11820 break;
11821 }
11822 }
11823 }
11824
11825 if (local_syms != NULL
11826 && (elf_symtab_hdr (isec->owner).contents
11827 != (unsigned char *) local_syms))
11828 free (local_syms);
11829 if (elf_section_data (isec)->relocs != relstart)
11830 free (relstart);
11831 }
11832
11833 if ((ret & 1) == 0
11834 && isec->map_head.s != NULL
11835 && (strcmp (isec->output_section->name, ".init") == 0
11836 || strcmp (isec->output_section->name, ".fini") == 0))
11837 {
11838 if (isec->map_head.s->has_toc_reloc
11839 || isec->map_head.s->makes_toc_func_call)
11840 ret = 1;
11841 else if (!isec->map_head.s->call_check_done)
11842 {
11843 int recur;
11844 isec->call_check_in_progress = 1;
11845 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11846 isec->call_check_in_progress = 0;
11847 if (recur != 0)
11848 ret = recur;
11849 }
11850 }
11851
11852 if (ret == 1)
11853 isec->makes_toc_func_call = 1;
11854
11855 return ret;
11856 }
11857
11858 /* The linker repeatedly calls this function for each input section,
11859 in the order that input sections are linked into output sections.
11860 Build lists of input sections to determine groupings between which
11861 we may insert linker stubs. */
11862
11863 bfd_boolean
11864 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11865 {
11866 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11867
11868 if (htab == NULL)
11869 return FALSE;
11870
11871 if ((isec->output_section->flags & SEC_CODE) != 0
11872 && isec->output_section->id < htab->sec_info_arr_size)
11873 {
11874 /* This happens to make the list in reverse order,
11875 which is what we want. */
11876 htab->sec_info[isec->id].u.list
11877 = htab->sec_info[isec->output_section->id].u.list;
11878 htab->sec_info[isec->output_section->id].u.list = isec;
11879 }
11880
11881 if (htab->multi_toc_needed)
11882 {
11883 /* Analyse sections that aren't already flagged as needing a
11884 valid toc pointer. Exclude .fixup for the linux kernel.
11885 .fixup contains branches, but only back to the function that
11886 hit an exception. */
11887 if (!(isec->has_toc_reloc
11888 || (isec->flags & SEC_CODE) == 0
11889 || strcmp (isec->name, ".fixup") == 0
11890 || isec->call_check_done))
11891 {
11892 if (toc_adjusting_stub_needed (info, isec) < 0)
11893 return FALSE;
11894 }
11895 /* Make all sections use the TOC assigned for this object file.
11896 This will be wrong for pasted sections; We fix that in
11897 check_pasted_section(). */
11898 if (elf_gp (isec->owner) != 0)
11899 htab->toc_curr = elf_gp (isec->owner);
11900 }
11901
11902 htab->sec_info[isec->id].toc_off = htab->toc_curr;
11903 return TRUE;
11904 }
11905
11906 /* Check that all .init and .fini sections use the same toc, if they
11907 have toc relocs. */
11908
11909 static bfd_boolean
11910 check_pasted_section (struct bfd_link_info *info, const char *name)
11911 {
11912 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11913
11914 if (o != NULL)
11915 {
11916 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11917 bfd_vma toc_off = 0;
11918 asection *i;
11919
11920 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11921 if (i->has_toc_reloc)
11922 {
11923 if (toc_off == 0)
11924 toc_off = htab->sec_info[i->id].toc_off;
11925 else if (toc_off != htab->sec_info[i->id].toc_off)
11926 return FALSE;
11927 }
11928
11929 if (toc_off == 0)
11930 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11931 if (i->makes_toc_func_call)
11932 {
11933 toc_off = htab->sec_info[i->id].toc_off;
11934 break;
11935 }
11936
11937 /* Make sure the whole pasted function uses the same toc offset. */
11938 if (toc_off != 0)
11939 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11940 htab->sec_info[i->id].toc_off = toc_off;
11941 }
11942 return TRUE;
11943 }
11944
11945 bfd_boolean
11946 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11947 {
11948 return (check_pasted_section (info, ".init")
11949 & check_pasted_section (info, ".fini"));
11950 }
11951
11952 /* See whether we can group stub sections together. Grouping stub
11953 sections may result in fewer stubs. More importantly, we need to
11954 put all .init* and .fini* stubs at the beginning of the .init or
11955 .fini output sections respectively, because glibc splits the
11956 _init and _fini functions into multiple parts. Putting a stub in
11957 the middle of a function is not a good idea. */
11958
11959 static bfd_boolean
11960 group_sections (struct bfd_link_info *info,
11961 bfd_size_type stub_group_size,
11962 bfd_boolean stubs_always_before_branch)
11963 {
11964 struct ppc_link_hash_table *htab;
11965 asection *osec;
11966 bfd_size_type stub14_group_size;
11967 bfd_boolean suppress_size_errors;
11968
11969 htab = ppc_hash_table (info);
11970 if (htab == NULL)
11971 return FALSE;
11972
11973 suppress_size_errors = FALSE;
11974 stub14_group_size = stub_group_size >> 10;
11975 if (stub_group_size == 1)
11976 {
11977 /* Default values. */
11978 if (stubs_always_before_branch)
11979 {
11980 stub_group_size = 0x1e00000;
11981 stub14_group_size = 0x7800;
11982 }
11983 else
11984 {
11985 stub_group_size = 0x1c00000;
11986 stub14_group_size = 0x7000;
11987 }
11988 suppress_size_errors = TRUE;
11989 }
11990
11991 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
11992 {
11993 asection *tail;
11994
11995 if (osec->id >= htab->sec_info_arr_size)
11996 continue;
11997
11998 tail = htab->sec_info[osec->id].u.list;
11999 while (tail != NULL)
12000 {
12001 asection *curr;
12002 asection *prev;
12003 bfd_size_type total;
12004 bfd_boolean big_sec;
12005 bfd_vma curr_toc;
12006 struct map_stub *group;
12007
12008 curr = tail;
12009 total = tail->size;
12010 big_sec = total > (ppc64_elf_section_data (tail) != NULL
12011 && ppc64_elf_section_data (tail)->has_14bit_branch
12012 ? stub14_group_size : stub_group_size);
12013 if (big_sec && !suppress_size_errors)
12014 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
12015 tail->owner, tail);
12016 curr_toc = htab->sec_info[tail->id].toc_off;
12017
12018 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12019 && ((total += curr->output_offset - prev->output_offset)
12020 < (ppc64_elf_section_data (prev) != NULL
12021 && ppc64_elf_section_data (prev)->has_14bit_branch
12022 ? stub14_group_size : stub_group_size))
12023 && htab->sec_info[prev->id].toc_off == curr_toc)
12024 curr = prev;
12025
12026 /* OK, the size from the start of CURR to the end is less
12027 than stub_group_size and thus can be handled by one stub
12028 section. (or the tail section is itself larger than
12029 stub_group_size, in which case we may be toast.) We
12030 should really be keeping track of the total size of stubs
12031 added here, as stubs contribute to the final output
12032 section size. That's a little tricky, and this way will
12033 only break if stubs added make the total size more than
12034 2^25, ie. for the default stub_group_size, if stubs total
12035 more than 2097152 bytes, or nearly 75000 plt call stubs. */
12036 group = bfd_alloc (curr->owner, sizeof (*group));
12037 if (group == NULL)
12038 return FALSE;
12039 group->link_sec = curr;
12040 group->stub_sec = NULL;
12041 group->needs_save_res = 0;
12042 group->next = htab->group;
12043 htab->group = group;
12044 do
12045 {
12046 prev = htab->sec_info[tail->id].u.list;
12047 /* Set up this stub group. */
12048 htab->sec_info[tail->id].u.group = group;
12049 }
12050 while (tail != curr && (tail = prev) != NULL);
12051
12052 /* But wait, there's more! Input sections up to stub_group_size
12053 bytes before the stub section can be handled by it too.
12054 Don't do this if we have a really large section after the
12055 stubs, as adding more stubs increases the chance that
12056 branches may not reach into the stub section. */
12057 if (!stubs_always_before_branch && !big_sec)
12058 {
12059 total = 0;
12060 while (prev != NULL
12061 && ((total += tail->output_offset - prev->output_offset)
12062 < (ppc64_elf_section_data (prev) != NULL
12063 && ppc64_elf_section_data (prev)->has_14bit_branch
12064 ? stub14_group_size : stub_group_size))
12065 && htab->sec_info[prev->id].toc_off == curr_toc)
12066 {
12067 tail = prev;
12068 prev = htab->sec_info[tail->id].u.list;
12069 htab->sec_info[tail->id].u.group = group;
12070 }
12071 }
12072 tail = prev;
12073 }
12074 }
12075 return TRUE;
12076 }
12077
12078 static const unsigned char glink_eh_frame_cie[] =
12079 {
12080 0, 0, 0, 16, /* length. */
12081 0, 0, 0, 0, /* id. */
12082 1, /* CIE version. */
12083 'z', 'R', 0, /* Augmentation string. */
12084 4, /* Code alignment. */
12085 0x78, /* Data alignment. */
12086 65, /* RA reg. */
12087 1, /* Augmentation size. */
12088 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12089 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12090 0, 0, 0, 0
12091 };
12092
12093 /* Stripping output sections is normally done before dynamic section
12094 symbols have been allocated. This function is called later, and
12095 handles cases like htab->brlt which is mapped to its own output
12096 section. */
12097
12098 static void
12099 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12100 {
12101 if (isec->size == 0
12102 && isec->output_section->size == 0
12103 && !(isec->output_section->flags & SEC_KEEP)
12104 && !bfd_section_removed_from_list (info->output_bfd,
12105 isec->output_section)
12106 && elf_section_data (isec->output_section)->dynindx == 0)
12107 {
12108 isec->output_section->flags |= SEC_EXCLUDE;
12109 bfd_section_list_remove (info->output_bfd, isec->output_section);
12110 info->output_bfd->section_count--;
12111 }
12112 }
12113
12114 /* Determine and set the size of the stub section for a final link.
12115
12116 The basic idea here is to examine all the relocations looking for
12117 PC-relative calls to a target that is unreachable with a "bl"
12118 instruction. */
12119
12120 bfd_boolean
12121 ppc64_elf_size_stubs (struct bfd_link_info *info)
12122 {
12123 bfd_size_type stub_group_size;
12124 bfd_boolean stubs_always_before_branch;
12125 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12126
12127 if (htab == NULL)
12128 return FALSE;
12129
12130 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12131 htab->params->plt_thread_safe = 1;
12132 if (!htab->opd_abi)
12133 htab->params->plt_thread_safe = 0;
12134 else if (htab->params->plt_thread_safe == -1)
12135 {
12136 static const char *const thread_starter[] =
12137 {
12138 "pthread_create",
12139 /* libstdc++ */
12140 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12141 /* librt */
12142 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12143 "mq_notify", "create_timer",
12144 /* libanl */
12145 "getaddrinfo_a",
12146 /* libgomp */
12147 "GOMP_parallel",
12148 "GOMP_parallel_start",
12149 "GOMP_parallel_loop_static",
12150 "GOMP_parallel_loop_static_start",
12151 "GOMP_parallel_loop_dynamic",
12152 "GOMP_parallel_loop_dynamic_start",
12153 "GOMP_parallel_loop_guided",
12154 "GOMP_parallel_loop_guided_start",
12155 "GOMP_parallel_loop_runtime",
12156 "GOMP_parallel_loop_runtime_start",
12157 "GOMP_parallel_sections",
12158 "GOMP_parallel_sections_start",
12159 /* libgo */
12160 "__go_go",
12161 };
12162 unsigned i;
12163
12164 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12165 {
12166 struct elf_link_hash_entry *h;
12167 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12168 FALSE, FALSE, TRUE);
12169 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12170 if (htab->params->plt_thread_safe)
12171 break;
12172 }
12173 }
12174 stubs_always_before_branch = htab->params->group_size < 0;
12175 if (htab->params->group_size < 0)
12176 stub_group_size = -htab->params->group_size;
12177 else
12178 stub_group_size = htab->params->group_size;
12179
12180 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12181 return FALSE;
12182
12183 while (1)
12184 {
12185 bfd *input_bfd;
12186 unsigned int bfd_indx;
12187 struct map_stub *group;
12188 asection *stub_sec;
12189
12190 htab->stub_iteration += 1;
12191
12192 for (input_bfd = info->input_bfds, bfd_indx = 0;
12193 input_bfd != NULL;
12194 input_bfd = input_bfd->link.next, bfd_indx++)
12195 {
12196 Elf_Internal_Shdr *symtab_hdr;
12197 asection *section;
12198 Elf_Internal_Sym *local_syms = NULL;
12199
12200 if (!is_ppc64_elf (input_bfd))
12201 continue;
12202
12203 /* We'll need the symbol table in a second. */
12204 symtab_hdr = &elf_symtab_hdr (input_bfd);
12205 if (symtab_hdr->sh_info == 0)
12206 continue;
12207
12208 /* Walk over each section attached to the input bfd. */
12209 for (section = input_bfd->sections;
12210 section != NULL;
12211 section = section->next)
12212 {
12213 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12214
12215 /* If there aren't any relocs, then there's nothing more
12216 to do. */
12217 if ((section->flags & SEC_RELOC) == 0
12218 || (section->flags & SEC_ALLOC) == 0
12219 || (section->flags & SEC_LOAD) == 0
12220 || (section->flags & SEC_CODE) == 0
12221 || section->reloc_count == 0)
12222 continue;
12223
12224 /* If this section is a link-once section that will be
12225 discarded, then don't create any stubs. */
12226 if (section->output_section == NULL
12227 || section->output_section->owner != info->output_bfd)
12228 continue;
12229
12230 /* Get the relocs. */
12231 internal_relocs
12232 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12233 info->keep_memory);
12234 if (internal_relocs == NULL)
12235 goto error_ret_free_local;
12236
12237 /* Now examine each relocation. */
12238 irela = internal_relocs;
12239 irelaend = irela + section->reloc_count;
12240 for (; irela < irelaend; irela++)
12241 {
12242 enum elf_ppc64_reloc_type r_type;
12243 unsigned int r_indx;
12244 enum ppc_stub_type stub_type;
12245 struct ppc_stub_hash_entry *stub_entry;
12246 asection *sym_sec, *code_sec;
12247 bfd_vma sym_value, code_value;
12248 bfd_vma destination;
12249 unsigned long local_off;
12250 bfd_boolean ok_dest;
12251 struct ppc_link_hash_entry *hash;
12252 struct ppc_link_hash_entry *fdh;
12253 struct elf_link_hash_entry *h;
12254 Elf_Internal_Sym *sym;
12255 char *stub_name;
12256 const asection *id_sec;
12257 struct _opd_sec_data *opd;
12258 struct plt_entry *plt_ent;
12259
12260 r_type = ELF64_R_TYPE (irela->r_info);
12261 r_indx = ELF64_R_SYM (irela->r_info);
12262
12263 if (r_type >= R_PPC64_max)
12264 {
12265 bfd_set_error (bfd_error_bad_value);
12266 goto error_ret_free_internal;
12267 }
12268
12269 /* Only look for stubs on branch instructions. */
12270 if (r_type != R_PPC64_REL24
12271 && r_type != R_PPC64_REL14
12272 && r_type != R_PPC64_REL14_BRTAKEN
12273 && r_type != R_PPC64_REL14_BRNTAKEN)
12274 continue;
12275
12276 /* Now determine the call target, its name, value,
12277 section. */
12278 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12279 r_indx, input_bfd))
12280 goto error_ret_free_internal;
12281 hash = (struct ppc_link_hash_entry *) h;
12282
12283 ok_dest = FALSE;
12284 fdh = NULL;
12285 sym_value = 0;
12286 if (hash == NULL)
12287 {
12288 sym_value = sym->st_value;
12289 if (sym_sec != NULL
12290 && sym_sec->output_section != NULL)
12291 ok_dest = TRUE;
12292 }
12293 else if (hash->elf.root.type == bfd_link_hash_defined
12294 || hash->elf.root.type == bfd_link_hash_defweak)
12295 {
12296 sym_value = hash->elf.root.u.def.value;
12297 if (sym_sec->output_section != NULL)
12298 ok_dest = TRUE;
12299 }
12300 else if (hash->elf.root.type == bfd_link_hash_undefweak
12301 || hash->elf.root.type == bfd_link_hash_undefined)
12302 {
12303 /* Recognise an old ABI func code entry sym, and
12304 use the func descriptor sym instead if it is
12305 defined. */
12306 if (hash->elf.root.root.string[0] == '.'
12307 && (fdh = lookup_fdh (hash, htab)) != NULL)
12308 {
12309 if (fdh->elf.root.type == bfd_link_hash_defined
12310 || fdh->elf.root.type == bfd_link_hash_defweak)
12311 {
12312 sym_sec = fdh->elf.root.u.def.section;
12313 sym_value = fdh->elf.root.u.def.value;
12314 if (sym_sec->output_section != NULL)
12315 ok_dest = TRUE;
12316 }
12317 else
12318 fdh = NULL;
12319 }
12320 }
12321 else
12322 {
12323 bfd_set_error (bfd_error_bad_value);
12324 goto error_ret_free_internal;
12325 }
12326
12327 destination = 0;
12328 local_off = 0;
12329 if (ok_dest)
12330 {
12331 sym_value += irela->r_addend;
12332 destination = (sym_value
12333 + sym_sec->output_offset
12334 + sym_sec->output_section->vma);
12335 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12336 ? hash->elf.other
12337 : sym->st_other);
12338 }
12339
12340 code_sec = sym_sec;
12341 code_value = sym_value;
12342 opd = get_opd_info (sym_sec);
12343 if (opd != NULL)
12344 {
12345 bfd_vma dest;
12346
12347 if (hash == NULL && opd->adjust != NULL)
12348 {
12349 long adjust = opd->adjust[OPD_NDX (sym_value)];
12350 if (adjust == -1)
12351 continue;
12352 code_value += adjust;
12353 sym_value += adjust;
12354 }
12355 dest = opd_entry_value (sym_sec, sym_value,
12356 &code_sec, &code_value, FALSE);
12357 if (dest != (bfd_vma) -1)
12358 {
12359 destination = dest;
12360 if (fdh != NULL)
12361 {
12362 /* Fixup old ABI sym to point at code
12363 entry. */
12364 hash->elf.root.type = bfd_link_hash_defweak;
12365 hash->elf.root.u.def.section = code_sec;
12366 hash->elf.root.u.def.value = code_value;
12367 }
12368 }
12369 }
12370
12371 /* Determine what (if any) linker stub is needed. */
12372 plt_ent = NULL;
12373 stub_type = ppc_type_of_stub (section, irela, &hash,
12374 &plt_ent, destination,
12375 local_off);
12376
12377 if (stub_type != ppc_stub_plt_call)
12378 {
12379 /* Check whether we need a TOC adjusting stub.
12380 Since the linker pastes together pieces from
12381 different object files when creating the
12382 _init and _fini functions, it may be that a
12383 call to what looks like a local sym is in
12384 fact a call needing a TOC adjustment. */
12385 if (code_sec != NULL
12386 && code_sec->output_section != NULL
12387 && (htab->sec_info[code_sec->id].toc_off
12388 != htab->sec_info[section->id].toc_off)
12389 && (code_sec->has_toc_reloc
12390 || code_sec->makes_toc_func_call))
12391 stub_type = ppc_stub_long_branch_r2off;
12392 }
12393
12394 if (stub_type == ppc_stub_none)
12395 continue;
12396
12397 /* __tls_get_addr calls might be eliminated. */
12398 if (stub_type != ppc_stub_plt_call
12399 && hash != NULL
12400 && (hash == htab->tls_get_addr
12401 || hash == htab->tls_get_addr_fd)
12402 && section->has_tls_reloc
12403 && irela != internal_relocs)
12404 {
12405 /* Get tls info. */
12406 unsigned char *tls_mask;
12407
12408 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12409 irela - 1, input_bfd))
12410 goto error_ret_free_internal;
12411 if (*tls_mask != 0)
12412 continue;
12413 }
12414
12415 if (stub_type == ppc_stub_plt_call
12416 && irela + 1 < irelaend
12417 && irela[1].r_offset == irela->r_offset + 4
12418 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12419 {
12420 if (!tocsave_find (htab, INSERT,
12421 &local_syms, irela + 1, input_bfd))
12422 goto error_ret_free_internal;
12423 }
12424 else if (stub_type == ppc_stub_plt_call)
12425 stub_type = ppc_stub_plt_call_r2save;
12426
12427 /* Support for grouping stub sections. */
12428 id_sec = htab->sec_info[section->id].u.group->link_sec;
12429
12430 /* Get the name of this stub. */
12431 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12432 if (!stub_name)
12433 goto error_ret_free_internal;
12434
12435 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12436 stub_name, FALSE, FALSE);
12437 if (stub_entry != NULL)
12438 {
12439 /* The proper stub has already been created. */
12440 free (stub_name);
12441 if (stub_type == ppc_stub_plt_call_r2save)
12442 stub_entry->stub_type = stub_type;
12443 continue;
12444 }
12445
12446 stub_entry = ppc_add_stub (stub_name, section, info);
12447 if (stub_entry == NULL)
12448 {
12449 free (stub_name);
12450 error_ret_free_internal:
12451 if (elf_section_data (section)->relocs == NULL)
12452 free (internal_relocs);
12453 error_ret_free_local:
12454 if (local_syms != NULL
12455 && (symtab_hdr->contents
12456 != (unsigned char *) local_syms))
12457 free (local_syms);
12458 return FALSE;
12459 }
12460
12461 stub_entry->stub_type = stub_type;
12462 if (stub_type != ppc_stub_plt_call
12463 && stub_type != ppc_stub_plt_call_r2save)
12464 {
12465 stub_entry->target_value = code_value;
12466 stub_entry->target_section = code_sec;
12467 }
12468 else
12469 {
12470 stub_entry->target_value = sym_value;
12471 stub_entry->target_section = sym_sec;
12472 }
12473 stub_entry->h = hash;
12474 stub_entry->plt_ent = plt_ent;
12475 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12476
12477 if (stub_entry->h != NULL)
12478 htab->stub_globals += 1;
12479 }
12480
12481 /* We're done with the internal relocs, free them. */
12482 if (elf_section_data (section)->relocs != internal_relocs)
12483 free (internal_relocs);
12484 }
12485
12486 if (local_syms != NULL
12487 && symtab_hdr->contents != (unsigned char *) local_syms)
12488 {
12489 if (!info->keep_memory)
12490 free (local_syms);
12491 else
12492 symtab_hdr->contents = (unsigned char *) local_syms;
12493 }
12494 }
12495
12496 /* We may have added some stubs. Find out the new size of the
12497 stub sections. */
12498 for (stub_sec = htab->params->stub_bfd->sections;
12499 stub_sec != NULL;
12500 stub_sec = stub_sec->next)
12501 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12502 {
12503 stub_sec->rawsize = stub_sec->size;
12504 stub_sec->size = 0;
12505 stub_sec->reloc_count = 0;
12506 stub_sec->flags &= ~SEC_RELOC;
12507 }
12508
12509 htab->brlt->size = 0;
12510 htab->brlt->reloc_count = 0;
12511 htab->brlt->flags &= ~SEC_RELOC;
12512 if (htab->relbrlt != NULL)
12513 htab->relbrlt->size = 0;
12514
12515 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12516
12517 for (group = htab->group; group != NULL; group = group->next)
12518 if (group->needs_save_res)
12519 group->stub_sec->size += htab->sfpr->size;
12520
12521 if (info->emitrelocations
12522 && htab->glink != NULL && htab->glink->size != 0)
12523 {
12524 htab->glink->reloc_count = 1;
12525 htab->glink->flags |= SEC_RELOC;
12526 }
12527
12528 if (htab->glink_eh_frame != NULL
12529 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12530 && htab->glink_eh_frame->output_section->size != 0)
12531 {
12532 size_t size = 0, align;
12533
12534 for (stub_sec = htab->params->stub_bfd->sections;
12535 stub_sec != NULL;
12536 stub_sec = stub_sec->next)
12537 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12538 size += 24;
12539 if (htab->glink != NULL && htab->glink->size != 0)
12540 size += 24;
12541 if (size != 0)
12542 size += sizeof (glink_eh_frame_cie);
12543 align = 1;
12544 align <<= htab->glink_eh_frame->output_section->alignment_power;
12545 align -= 1;
12546 size = (size + align) & ~align;
12547 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12548 htab->glink_eh_frame->size = size;
12549 }
12550
12551 if (htab->params->plt_stub_align != 0)
12552 for (stub_sec = htab->params->stub_bfd->sections;
12553 stub_sec != NULL;
12554 stub_sec = stub_sec->next)
12555 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12556 stub_sec->size = ((stub_sec->size
12557 + (1 << htab->params->plt_stub_align) - 1)
12558 & -(1 << htab->params->plt_stub_align));
12559
12560 for (stub_sec = htab->params->stub_bfd->sections;
12561 stub_sec != NULL;
12562 stub_sec = stub_sec->next)
12563 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12564 && stub_sec->rawsize != stub_sec->size)
12565 break;
12566
12567 /* Exit from this loop when no stubs have been added, and no stubs
12568 have changed size. */
12569 if (stub_sec == NULL
12570 && (htab->glink_eh_frame == NULL
12571 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12572 break;
12573
12574 /* Ask the linker to do its stuff. */
12575 (*htab->params->layout_sections_again) ();
12576 }
12577
12578 if (htab->glink_eh_frame != NULL
12579 && htab->glink_eh_frame->size != 0)
12580 {
12581 bfd_vma val;
12582 bfd_byte *p, *last_fde;
12583 size_t last_fde_len, size, align, pad;
12584 asection *stub_sec;
12585
12586 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12587 if (p == NULL)
12588 return FALSE;
12589 htab->glink_eh_frame->contents = p;
12590 last_fde = p;
12591
12592 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12593 /* CIE length (rewrite in case little-endian). */
12594 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12595 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12596 p += sizeof (glink_eh_frame_cie);
12597
12598 for (stub_sec = htab->params->stub_bfd->sections;
12599 stub_sec != NULL;
12600 stub_sec = stub_sec->next)
12601 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12602 {
12603 last_fde = p;
12604 last_fde_len = 20;
12605 /* FDE length. */
12606 bfd_put_32 (htab->elf.dynobj, 20, p);
12607 p += 4;
12608 /* CIE pointer. */
12609 val = p - htab->glink_eh_frame->contents;
12610 bfd_put_32 (htab->elf.dynobj, val, p);
12611 p += 4;
12612 /* Offset to stub section, written later. */
12613 p += 4;
12614 /* stub section size. */
12615 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12616 p += 4;
12617 /* Augmentation. */
12618 p += 1;
12619 /* Pad. */
12620 p += 7;
12621 }
12622 if (htab->glink != NULL && htab->glink->size != 0)
12623 {
12624 last_fde = p;
12625 last_fde_len = 20;
12626 /* FDE length. */
12627 bfd_put_32 (htab->elf.dynobj, 20, p);
12628 p += 4;
12629 /* CIE pointer. */
12630 val = p - htab->glink_eh_frame->contents;
12631 bfd_put_32 (htab->elf.dynobj, val, p);
12632 p += 4;
12633 /* Offset to .glink, written later. */
12634 p += 4;
12635 /* .glink size. */
12636 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12637 p += 4;
12638 /* Augmentation. */
12639 p += 1;
12640
12641 *p++ = DW_CFA_advance_loc + 1;
12642 *p++ = DW_CFA_register;
12643 *p++ = 65;
12644 *p++ = htab->opd_abi ? 12 : 0;
12645 *p++ = DW_CFA_advance_loc + 4;
12646 *p++ = DW_CFA_restore_extended;
12647 *p++ = 65;
12648 }
12649 /* Subsume any padding into the last FDE if user .eh_frame
12650 sections are aligned more than glink_eh_frame. Otherwise any
12651 zero padding will be seen as a terminator. */
12652 size = p - htab->glink_eh_frame->contents;
12653 align = 1;
12654 align <<= htab->glink_eh_frame->output_section->alignment_power;
12655 align -= 1;
12656 pad = ((size + align) & ~align) - size;
12657 htab->glink_eh_frame->size = size + pad;
12658 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12659 }
12660
12661 maybe_strip_output (info, htab->brlt);
12662 if (htab->glink_eh_frame != NULL)
12663 maybe_strip_output (info, htab->glink_eh_frame);
12664
12665 return TRUE;
12666 }
12667
12668 /* Called after we have determined section placement. If sections
12669 move, we'll be called again. Provide a value for TOCstart. */
12670
12671 bfd_vma
12672 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12673 {
12674 asection *s;
12675 bfd_vma TOCstart, adjust;
12676
12677 if (info != NULL)
12678 {
12679 struct elf_link_hash_entry *h;
12680 struct elf_link_hash_table *htab = elf_hash_table (info);
12681
12682 if (is_elf_hash_table (htab)
12683 && htab->hgot != NULL)
12684 h = htab->hgot;
12685 else
12686 {
12687 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12688 if (is_elf_hash_table (htab))
12689 htab->hgot = h;
12690 }
12691 if (h != NULL
12692 && h->root.type == bfd_link_hash_defined
12693 && !h->root.linker_def
12694 && (!is_elf_hash_table (htab)
12695 || h->def_regular))
12696 {
12697 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12698 + h->root.u.def.section->output_offset
12699 + h->root.u.def.section->output_section->vma);
12700 _bfd_set_gp_value (obfd, TOCstart);
12701 return TOCstart;
12702 }
12703 }
12704
12705 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12706 order. The TOC starts where the first of these sections starts. */
12707 s = bfd_get_section_by_name (obfd, ".got");
12708 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12709 s = bfd_get_section_by_name (obfd, ".toc");
12710 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12711 s = bfd_get_section_by_name (obfd, ".tocbss");
12712 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12713 s = bfd_get_section_by_name (obfd, ".plt");
12714 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12715 {
12716 /* This may happen for
12717 o references to TOC base (SYM@toc / TOC[tc0]) without a
12718 .toc directive
12719 o bad linker script
12720 o --gc-sections and empty TOC sections
12721
12722 FIXME: Warn user? */
12723
12724 /* Look for a likely section. We probably won't even be
12725 using TOCstart. */
12726 for (s = obfd->sections; s != NULL; s = s->next)
12727 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12728 | SEC_EXCLUDE))
12729 == (SEC_ALLOC | SEC_SMALL_DATA))
12730 break;
12731 if (s == NULL)
12732 for (s = obfd->sections; s != NULL; s = s->next)
12733 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12734 == (SEC_ALLOC | SEC_SMALL_DATA))
12735 break;
12736 if (s == NULL)
12737 for (s = obfd->sections; s != NULL; s = s->next)
12738 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12739 == SEC_ALLOC)
12740 break;
12741 if (s == NULL)
12742 for (s = obfd->sections; s != NULL; s = s->next)
12743 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12744 break;
12745 }
12746
12747 TOCstart = 0;
12748 if (s != NULL)
12749 TOCstart = s->output_section->vma + s->output_offset;
12750
12751 /* Force alignment. */
12752 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12753 TOCstart -= adjust;
12754 _bfd_set_gp_value (obfd, TOCstart);
12755
12756 if (info != NULL && s != NULL)
12757 {
12758 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12759
12760 if (htab != NULL)
12761 {
12762 if (htab->elf.hgot != NULL)
12763 {
12764 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12765 htab->elf.hgot->root.u.def.section = s;
12766 }
12767 }
12768 else
12769 {
12770 struct bfd_link_hash_entry *bh = NULL;
12771 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12772 s, TOC_BASE_OFF - adjust,
12773 NULL, FALSE, FALSE, &bh);
12774 }
12775 }
12776 return TOCstart;
12777 }
12778
12779 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12780 write out any global entry stubs. */
12781
12782 static bfd_boolean
12783 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12784 {
12785 struct bfd_link_info *info;
12786 struct ppc_link_hash_table *htab;
12787 struct plt_entry *pent;
12788 asection *s;
12789
12790 if (h->root.type == bfd_link_hash_indirect)
12791 return TRUE;
12792
12793 if (!h->pointer_equality_needed)
12794 return TRUE;
12795
12796 if (h->def_regular)
12797 return TRUE;
12798
12799 info = inf;
12800 htab = ppc_hash_table (info);
12801 if (htab == NULL)
12802 return FALSE;
12803
12804 s = htab->glink;
12805 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12806 if (pent->plt.offset != (bfd_vma) -1
12807 && pent->addend == 0)
12808 {
12809 bfd_byte *p;
12810 asection *plt;
12811 bfd_vma off;
12812
12813 p = s->contents + h->root.u.def.value;
12814 plt = htab->elf.splt;
12815 if (!htab->elf.dynamic_sections_created
12816 || h->dynindx == -1)
12817 plt = htab->elf.iplt;
12818 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12819 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12820
12821 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12822 {
12823 info->callbacks->einfo
12824 (_("%P: linkage table error against `%T'\n"),
12825 h->root.root.string);
12826 bfd_set_error (bfd_error_bad_value);
12827 htab->stub_error = TRUE;
12828 }
12829
12830 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12831 if (htab->params->emit_stub_syms)
12832 {
12833 size_t len = strlen (h->root.root.string);
12834 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12835
12836 if (name == NULL)
12837 return FALSE;
12838
12839 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12840 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12841 if (h == NULL)
12842 return FALSE;
12843 if (h->root.type == bfd_link_hash_new)
12844 {
12845 h->root.type = bfd_link_hash_defined;
12846 h->root.u.def.section = s;
12847 h->root.u.def.value = p - s->contents;
12848 h->ref_regular = 1;
12849 h->def_regular = 1;
12850 h->ref_regular_nonweak = 1;
12851 h->forced_local = 1;
12852 h->non_elf = 0;
12853 h->root.linker_def = 1;
12854 }
12855 }
12856
12857 if (PPC_HA (off) != 0)
12858 {
12859 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12860 p += 4;
12861 }
12862 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12863 p += 4;
12864 bfd_put_32 (s->owner, MTCTR_R12, p);
12865 p += 4;
12866 bfd_put_32 (s->owner, BCTR, p);
12867 break;
12868 }
12869 return TRUE;
12870 }
12871
12872 /* Build all the stubs associated with the current output file.
12873 The stubs are kept in a hash table attached to the main linker
12874 hash table. This function is called via gldelf64ppc_finish. */
12875
12876 bfd_boolean
12877 ppc64_elf_build_stubs (struct bfd_link_info *info,
12878 char **stats)
12879 {
12880 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12881 struct map_stub *group;
12882 asection *stub_sec;
12883 bfd_byte *p;
12884 int stub_sec_count = 0;
12885
12886 if (htab == NULL)
12887 return FALSE;
12888
12889 /* Allocate memory to hold the linker stubs. */
12890 for (stub_sec = htab->params->stub_bfd->sections;
12891 stub_sec != NULL;
12892 stub_sec = stub_sec->next)
12893 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12894 && stub_sec->size != 0)
12895 {
12896 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12897 if (stub_sec->contents == NULL)
12898 return FALSE;
12899 /* We want to check that built size is the same as calculated
12900 size. rawsize is a convenient location to use. */
12901 stub_sec->rawsize = stub_sec->size;
12902 stub_sec->size = 0;
12903 }
12904
12905 if (htab->glink != NULL && htab->glink->size != 0)
12906 {
12907 unsigned int indx;
12908 bfd_vma plt0;
12909
12910 /* Build the .glink plt call stub. */
12911 if (htab->params->emit_stub_syms)
12912 {
12913 struct elf_link_hash_entry *h;
12914 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12915 TRUE, FALSE, FALSE);
12916 if (h == NULL)
12917 return FALSE;
12918 if (h->root.type == bfd_link_hash_new)
12919 {
12920 h->root.type = bfd_link_hash_defined;
12921 h->root.u.def.section = htab->glink;
12922 h->root.u.def.value = 8;
12923 h->ref_regular = 1;
12924 h->def_regular = 1;
12925 h->ref_regular_nonweak = 1;
12926 h->forced_local = 1;
12927 h->non_elf = 0;
12928 h->root.linker_def = 1;
12929 }
12930 }
12931 plt0 = (htab->elf.splt->output_section->vma
12932 + htab->elf.splt->output_offset
12933 - 16);
12934 if (info->emitrelocations)
12935 {
12936 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12937 if (r == NULL)
12938 return FALSE;
12939 r->r_offset = (htab->glink->output_offset
12940 + htab->glink->output_section->vma);
12941 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12942 r->r_addend = plt0;
12943 }
12944 p = htab->glink->contents;
12945 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12946 bfd_put_64 (htab->glink->owner, plt0, p);
12947 p += 8;
12948 if (htab->opd_abi)
12949 {
12950 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12951 p += 4;
12952 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12953 p += 4;
12954 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12955 p += 4;
12956 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12957 p += 4;
12958 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12959 p += 4;
12960 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12961 p += 4;
12962 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12963 p += 4;
12964 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12965 p += 4;
12966 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12967 p += 4;
12968 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12969 p += 4;
12970 }
12971 else
12972 {
12973 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12974 p += 4;
12975 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12976 p += 4;
12977 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12978 p += 4;
12979 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12980 p += 4;
12981 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12982 p += 4;
12983 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
12984 p += 4;
12985 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12986 p += 4;
12987 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
12988 p += 4;
12989 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12990 p += 4;
12991 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
12992 p += 4;
12993 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12994 p += 4;
12995 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
12996 p += 4;
12997 }
12998 bfd_put_32 (htab->glink->owner, BCTR, p);
12999 p += 4;
13000 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13001 {
13002 bfd_put_32 (htab->glink->owner, NOP, p);
13003 p += 4;
13004 }
13005
13006 /* Build the .glink lazy link call stubs. */
13007 indx = 0;
13008 while (p < htab->glink->contents + htab->glink->rawsize)
13009 {
13010 if (htab->opd_abi)
13011 {
13012 if (indx < 0x8000)
13013 {
13014 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13015 p += 4;
13016 }
13017 else
13018 {
13019 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13020 p += 4;
13021 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13022 p);
13023 p += 4;
13024 }
13025 }
13026 bfd_put_32 (htab->glink->owner,
13027 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13028 indx++;
13029 p += 4;
13030 }
13031
13032 /* Build .glink global entry stubs. */
13033 if (htab->glink->size > htab->glink->rawsize)
13034 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13035 }
13036
13037 if (htab->brlt != NULL && htab->brlt->size != 0)
13038 {
13039 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13040 htab->brlt->size);
13041 if (htab->brlt->contents == NULL)
13042 return FALSE;
13043 }
13044 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13045 {
13046 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13047 htab->relbrlt->size);
13048 if (htab->relbrlt->contents == NULL)
13049 return FALSE;
13050 }
13051
13052 /* Build the stubs as directed by the stub hash table. */
13053 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13054
13055 for (group = htab->group; group != NULL; group = group->next)
13056 if (group->needs_save_res)
13057 {
13058 stub_sec = group->stub_sec;
13059 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13060 htab->sfpr->size);
13061 if (htab->params->emit_stub_syms)
13062 {
13063 unsigned int i;
13064
13065 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13066 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13067 return FALSE;
13068 }
13069 stub_sec->size += htab->sfpr->size;
13070 }
13071
13072 if (htab->relbrlt != NULL)
13073 htab->relbrlt->reloc_count = 0;
13074
13075 if (htab->params->plt_stub_align != 0)
13076 for (stub_sec = htab->params->stub_bfd->sections;
13077 stub_sec != NULL;
13078 stub_sec = stub_sec->next)
13079 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13080 stub_sec->size = ((stub_sec->size
13081 + (1 << htab->params->plt_stub_align) - 1)
13082 & -(1 << htab->params->plt_stub_align));
13083
13084 for (stub_sec = htab->params->stub_bfd->sections;
13085 stub_sec != NULL;
13086 stub_sec = stub_sec->next)
13087 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13088 {
13089 stub_sec_count += 1;
13090 if (stub_sec->rawsize != stub_sec->size)
13091 break;
13092 }
13093
13094 /* Note that the glink_eh_frame check here is not only testing that
13095 the generated size matched the calculated size but also that
13096 bfd_elf_discard_info didn't make any changes to the section. */
13097 if (stub_sec != NULL
13098 || (htab->glink_eh_frame != NULL
13099 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13100 {
13101 htab->stub_error = TRUE;
13102 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13103 }
13104
13105 if (htab->stub_error)
13106 return FALSE;
13107
13108 if (stats != NULL)
13109 {
13110 *stats = bfd_malloc (500);
13111 if (*stats == NULL)
13112 return FALSE;
13113
13114 sprintf (*stats, _("linker stubs in %u group%s\n"
13115 " branch %lu\n"
13116 " toc adjust %lu\n"
13117 " long branch %lu\n"
13118 " long toc adj %lu\n"
13119 " plt call %lu\n"
13120 " plt call toc %lu\n"
13121 " global entry %lu"),
13122 stub_sec_count,
13123 stub_sec_count == 1 ? "" : "s",
13124 htab->stub_count[ppc_stub_long_branch - 1],
13125 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13126 htab->stub_count[ppc_stub_plt_branch - 1],
13127 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13128 htab->stub_count[ppc_stub_plt_call - 1],
13129 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13130 htab->stub_count[ppc_stub_global_entry - 1]);
13131 }
13132 return TRUE;
13133 }
13134
13135 /* This function undoes the changes made by add_symbol_adjust. */
13136
13137 static bfd_boolean
13138 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
13139 {
13140 struct ppc_link_hash_entry *eh;
13141
13142 if (h->root.type == bfd_link_hash_indirect)
13143 return TRUE;
13144
13145 eh = (struct ppc_link_hash_entry *) h;
13146 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
13147 return TRUE;
13148
13149 eh->elf.root.type = bfd_link_hash_undefined;
13150 return TRUE;
13151 }
13152
13153 void
13154 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13155 {
13156 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13157
13158 if (htab != NULL)
13159 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13160 }
13161
13162 /* What to do when ld finds relocations against symbols defined in
13163 discarded sections. */
13164
13165 static unsigned int
13166 ppc64_elf_action_discarded (asection *sec)
13167 {
13168 if (strcmp (".opd", sec->name) == 0)
13169 return 0;
13170
13171 if (strcmp (".toc", sec->name) == 0)
13172 return 0;
13173
13174 if (strcmp (".toc1", sec->name) == 0)
13175 return 0;
13176
13177 return _bfd_elf_default_action_discarded (sec);
13178 }
13179
13180 /* The RELOCATE_SECTION function is called by the ELF backend linker
13181 to handle the relocations for a section.
13182
13183 The relocs are always passed as Rela structures; if the section
13184 actually uses Rel structures, the r_addend field will always be
13185 zero.
13186
13187 This function is responsible for adjust the section contents as
13188 necessary, and (if using Rela relocs and generating a
13189 relocatable output file) adjusting the reloc addend as
13190 necessary.
13191
13192 This function does not have to worry about setting the reloc
13193 address or the reloc symbol index.
13194
13195 LOCAL_SYMS is a pointer to the swapped in local symbols.
13196
13197 LOCAL_SECTIONS is an array giving the section in the input file
13198 corresponding to the st_shndx field of each local symbol.
13199
13200 The global hash table entry for the global symbols can be found
13201 via elf_sym_hashes (input_bfd).
13202
13203 When generating relocatable output, this function must handle
13204 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13205 going to be the section symbol corresponding to the output
13206 section, which means that the addend must be adjusted
13207 accordingly. */
13208
13209 static bfd_boolean
13210 ppc64_elf_relocate_section (bfd *output_bfd,
13211 struct bfd_link_info *info,
13212 bfd *input_bfd,
13213 asection *input_section,
13214 bfd_byte *contents,
13215 Elf_Internal_Rela *relocs,
13216 Elf_Internal_Sym *local_syms,
13217 asection **local_sections)
13218 {
13219 struct ppc_link_hash_table *htab;
13220 Elf_Internal_Shdr *symtab_hdr;
13221 struct elf_link_hash_entry **sym_hashes;
13222 Elf_Internal_Rela *rel;
13223 Elf_Internal_Rela *wrel;
13224 Elf_Internal_Rela *relend;
13225 Elf_Internal_Rela outrel;
13226 bfd_byte *loc;
13227 struct got_entry **local_got_ents;
13228 bfd_vma TOCstart;
13229 bfd_boolean ret = TRUE;
13230 bfd_boolean is_opd;
13231 /* Assume 'at' branch hints. */
13232 bfd_boolean is_isa_v2 = TRUE;
13233 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13234
13235 /* Initialize howto table if needed. */
13236 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13237 ppc_howto_init ();
13238
13239 htab = ppc_hash_table (info);
13240 if (htab == NULL)
13241 return FALSE;
13242
13243 /* Don't relocate stub sections. */
13244 if (input_section->owner == htab->params->stub_bfd)
13245 return TRUE;
13246
13247 BFD_ASSERT (is_ppc64_elf (input_bfd));
13248
13249 local_got_ents = elf_local_got_ents (input_bfd);
13250 TOCstart = elf_gp (output_bfd);
13251 symtab_hdr = &elf_symtab_hdr (input_bfd);
13252 sym_hashes = elf_sym_hashes (input_bfd);
13253 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13254
13255 rel = wrel = relocs;
13256 relend = relocs + input_section->reloc_count;
13257 for (; rel < relend; wrel++, rel++)
13258 {
13259 enum elf_ppc64_reloc_type r_type;
13260 bfd_vma addend;
13261 bfd_reloc_status_type r;
13262 Elf_Internal_Sym *sym;
13263 asection *sec;
13264 struct elf_link_hash_entry *h_elf;
13265 struct ppc_link_hash_entry *h;
13266 struct ppc_link_hash_entry *fdh;
13267 const char *sym_name;
13268 unsigned long r_symndx, toc_symndx;
13269 bfd_vma toc_addend;
13270 unsigned char tls_mask, tls_gd, tls_type;
13271 unsigned char sym_type;
13272 bfd_vma relocation;
13273 bfd_boolean unresolved_reloc;
13274 bfd_boolean warned;
13275 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13276 unsigned int insn;
13277 unsigned int mask;
13278 struct ppc_stub_hash_entry *stub_entry;
13279 bfd_vma max_br_offset;
13280 bfd_vma from;
13281 Elf_Internal_Rela orig_rel;
13282 reloc_howto_type *howto;
13283 struct reloc_howto_struct alt_howto;
13284
13285 again:
13286 orig_rel = *rel;
13287
13288 r_type = ELF64_R_TYPE (rel->r_info);
13289 r_symndx = ELF64_R_SYM (rel->r_info);
13290
13291 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13292 symbol of the previous ADDR64 reloc. The symbol gives us the
13293 proper TOC base to use. */
13294 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13295 && wrel != relocs
13296 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13297 && is_opd)
13298 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13299
13300 sym = NULL;
13301 sec = NULL;
13302 h_elf = NULL;
13303 sym_name = NULL;
13304 unresolved_reloc = FALSE;
13305 warned = FALSE;
13306
13307 if (r_symndx < symtab_hdr->sh_info)
13308 {
13309 /* It's a local symbol. */
13310 struct _opd_sec_data *opd;
13311
13312 sym = local_syms + r_symndx;
13313 sec = local_sections[r_symndx];
13314 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13315 sym_type = ELF64_ST_TYPE (sym->st_info);
13316 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13317 opd = get_opd_info (sec);
13318 if (opd != NULL && opd->adjust != NULL)
13319 {
13320 long adjust = opd->adjust[OPD_NDX (sym->st_value
13321 + rel->r_addend)];
13322 if (adjust == -1)
13323 relocation = 0;
13324 else
13325 {
13326 /* If this is a relocation against the opd section sym
13327 and we have edited .opd, adjust the reloc addend so
13328 that ld -r and ld --emit-relocs output is correct.
13329 If it is a reloc against some other .opd symbol,
13330 then the symbol value will be adjusted later. */
13331 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13332 rel->r_addend += adjust;
13333 else
13334 relocation += adjust;
13335 }
13336 }
13337 }
13338 else
13339 {
13340 bfd_boolean ignored;
13341
13342 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13343 r_symndx, symtab_hdr, sym_hashes,
13344 h_elf, sec, relocation,
13345 unresolved_reloc, warned, ignored);
13346 sym_name = h_elf->root.root.string;
13347 sym_type = h_elf->type;
13348 if (sec != NULL
13349 && sec->owner == output_bfd
13350 && strcmp (sec->name, ".opd") == 0)
13351 {
13352 /* This is a symbol defined in a linker script. All
13353 such are defined in output sections, even those
13354 defined by simple assignment from a symbol defined in
13355 an input section. Transfer the symbol to an
13356 appropriate input .opd section, so that a branch to
13357 this symbol will be mapped to the location specified
13358 by the opd entry. */
13359 struct bfd_link_order *lo;
13360 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13361 if (lo->type == bfd_indirect_link_order)
13362 {
13363 asection *isec = lo->u.indirect.section;
13364 if (h_elf->root.u.def.value >= isec->output_offset
13365 && h_elf->root.u.def.value < (isec->output_offset
13366 + isec->size))
13367 {
13368 h_elf->root.u.def.value -= isec->output_offset;
13369 h_elf->root.u.def.section = isec;
13370 sec = isec;
13371 break;
13372 }
13373 }
13374 }
13375 }
13376 h = (struct ppc_link_hash_entry *) h_elf;
13377
13378 if (sec != NULL && discarded_section (sec))
13379 {
13380 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13381 input_bfd, input_section,
13382 contents + rel->r_offset);
13383 wrel->r_offset = rel->r_offset;
13384 wrel->r_info = 0;
13385 wrel->r_addend = 0;
13386
13387 /* For ld -r, remove relocations in debug sections against
13388 sections defined in discarded sections. Not done for
13389 non-debug to preserve relocs in .eh_frame which the
13390 eh_frame editing code expects to be present. */
13391 if (bfd_link_relocatable (info)
13392 && (input_section->flags & SEC_DEBUGGING))
13393 wrel--;
13394
13395 continue;
13396 }
13397
13398 if (bfd_link_relocatable (info))
13399 goto copy_reloc;
13400
13401 if (h != NULL && &h->elf == htab->elf.hgot)
13402 {
13403 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13404 sec = bfd_abs_section_ptr;
13405 unresolved_reloc = FALSE;
13406 }
13407
13408 /* TLS optimizations. Replace instruction sequences and relocs
13409 based on information we collected in tls_optimize. We edit
13410 RELOCS so that --emit-relocs will output something sensible
13411 for the final instruction stream. */
13412 tls_mask = 0;
13413 tls_gd = 0;
13414 toc_symndx = 0;
13415 if (h != NULL)
13416 tls_mask = h->tls_mask;
13417 else if (local_got_ents != NULL)
13418 {
13419 struct plt_entry **local_plt = (struct plt_entry **)
13420 (local_got_ents + symtab_hdr->sh_info);
13421 unsigned char *lgot_masks = (unsigned char *)
13422 (local_plt + symtab_hdr->sh_info);
13423 tls_mask = lgot_masks[r_symndx];
13424 }
13425 if (tls_mask == 0
13426 && (r_type == R_PPC64_TLS
13427 || r_type == R_PPC64_TLSGD
13428 || r_type == R_PPC64_TLSLD))
13429 {
13430 /* Check for toc tls entries. */
13431 unsigned char *toc_tls;
13432
13433 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13434 &local_syms, rel, input_bfd))
13435 return FALSE;
13436
13437 if (toc_tls)
13438 tls_mask = *toc_tls;
13439 }
13440
13441 /* Check that tls relocs are used with tls syms, and non-tls
13442 relocs are used with non-tls syms. */
13443 if (r_symndx != STN_UNDEF
13444 && r_type != R_PPC64_NONE
13445 && (h == NULL
13446 || h->elf.root.type == bfd_link_hash_defined
13447 || h->elf.root.type == bfd_link_hash_defweak)
13448 && (IS_PPC64_TLS_RELOC (r_type)
13449 != (sym_type == STT_TLS
13450 || (sym_type == STT_SECTION
13451 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13452 {
13453 if (tls_mask != 0
13454 && (r_type == R_PPC64_TLS
13455 || r_type == R_PPC64_TLSGD
13456 || r_type == R_PPC64_TLSLD))
13457 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13458 ;
13459 else
13460 info->callbacks->einfo
13461 (!IS_PPC64_TLS_RELOC (r_type)
13462 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13463 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13464 input_bfd, input_section, rel->r_offset,
13465 ppc64_elf_howto_table[r_type]->name,
13466 sym_name);
13467 }
13468
13469 /* Ensure reloc mapping code below stays sane. */
13470 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13471 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13472 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13473 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13474 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13475 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13476 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13477 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13478 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13479 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13480 abort ();
13481
13482 switch (r_type)
13483 {
13484 default:
13485 break;
13486
13487 case R_PPC64_LO_DS_OPT:
13488 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13489 if ((insn & (0x3f << 26)) != 58u << 26)
13490 abort ();
13491 insn += (14u << 26) - (58u << 26);
13492 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13493 r_type = R_PPC64_TOC16_LO;
13494 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13495 break;
13496
13497 case R_PPC64_TOC16:
13498 case R_PPC64_TOC16_LO:
13499 case R_PPC64_TOC16_DS:
13500 case R_PPC64_TOC16_LO_DS:
13501 {
13502 /* Check for toc tls entries. */
13503 unsigned char *toc_tls;
13504 int retval;
13505
13506 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13507 &local_syms, rel, input_bfd);
13508 if (retval == 0)
13509 return FALSE;
13510
13511 if (toc_tls)
13512 {
13513 tls_mask = *toc_tls;
13514 if (r_type == R_PPC64_TOC16_DS
13515 || r_type == R_PPC64_TOC16_LO_DS)
13516 {
13517 if (tls_mask != 0
13518 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13519 goto toctprel;
13520 }
13521 else
13522 {
13523 /* If we found a GD reloc pair, then we might be
13524 doing a GD->IE transition. */
13525 if (retval == 2)
13526 {
13527 tls_gd = TLS_TPRELGD;
13528 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13529 goto tls_ldgd_opt;
13530 }
13531 else if (retval == 3)
13532 {
13533 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13534 goto tls_ldgd_opt;
13535 }
13536 }
13537 }
13538 }
13539 break;
13540
13541 case R_PPC64_GOT_TPREL16_HI:
13542 case R_PPC64_GOT_TPREL16_HA:
13543 if (tls_mask != 0
13544 && (tls_mask & TLS_TPREL) == 0)
13545 {
13546 rel->r_offset -= d_offset;
13547 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13548 r_type = R_PPC64_NONE;
13549 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13550 }
13551 break;
13552
13553 case R_PPC64_GOT_TPREL16_DS:
13554 case R_PPC64_GOT_TPREL16_LO_DS:
13555 if (tls_mask != 0
13556 && (tls_mask & TLS_TPREL) == 0)
13557 {
13558 toctprel:
13559 insn = bfd_get_32 (output_bfd,
13560 contents + rel->r_offset - d_offset);
13561 insn &= 31 << 21;
13562 insn |= 0x3c0d0000; /* addis 0,13,0 */
13563 bfd_put_32 (output_bfd, insn,
13564 contents + rel->r_offset - d_offset);
13565 r_type = R_PPC64_TPREL16_HA;
13566 if (toc_symndx != 0)
13567 {
13568 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13569 rel->r_addend = toc_addend;
13570 /* We changed the symbol. Start over in order to
13571 get h, sym, sec etc. right. */
13572 goto again;
13573 }
13574 else
13575 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13576 }
13577 break;
13578
13579 case R_PPC64_TLS:
13580 if (tls_mask != 0
13581 && (tls_mask & TLS_TPREL) == 0)
13582 {
13583 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13584 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13585 if (insn == 0)
13586 abort ();
13587 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13588 /* Was PPC64_TLS which sits on insn boundary, now
13589 PPC64_TPREL16_LO which is at low-order half-word. */
13590 rel->r_offset += d_offset;
13591 r_type = R_PPC64_TPREL16_LO;
13592 if (toc_symndx != 0)
13593 {
13594 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13595 rel->r_addend = toc_addend;
13596 /* We changed the symbol. Start over in order to
13597 get h, sym, sec etc. right. */
13598 goto again;
13599 }
13600 else
13601 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13602 }
13603 break;
13604
13605 case R_PPC64_GOT_TLSGD16_HI:
13606 case R_PPC64_GOT_TLSGD16_HA:
13607 tls_gd = TLS_TPRELGD;
13608 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13609 goto tls_gdld_hi;
13610 break;
13611
13612 case R_PPC64_GOT_TLSLD16_HI:
13613 case R_PPC64_GOT_TLSLD16_HA:
13614 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13615 {
13616 tls_gdld_hi:
13617 if ((tls_mask & tls_gd) != 0)
13618 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13619 + R_PPC64_GOT_TPREL16_DS);
13620 else
13621 {
13622 rel->r_offset -= d_offset;
13623 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13624 r_type = R_PPC64_NONE;
13625 }
13626 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13627 }
13628 break;
13629
13630 case R_PPC64_GOT_TLSGD16:
13631 case R_PPC64_GOT_TLSGD16_LO:
13632 tls_gd = TLS_TPRELGD;
13633 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13634 goto tls_ldgd_opt;
13635 break;
13636
13637 case R_PPC64_GOT_TLSLD16:
13638 case R_PPC64_GOT_TLSLD16_LO:
13639 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13640 {
13641 unsigned int insn1, insn2, insn3;
13642 bfd_vma offset;
13643
13644 tls_ldgd_opt:
13645 offset = (bfd_vma) -1;
13646 /* If not using the newer R_PPC64_TLSGD/LD to mark
13647 __tls_get_addr calls, we must trust that the call
13648 stays with its arg setup insns, ie. that the next
13649 reloc is the __tls_get_addr call associated with
13650 the current reloc. Edit both insns. */
13651 if (input_section->has_tls_get_addr_call
13652 && rel + 1 < relend
13653 && branch_reloc_hash_match (input_bfd, rel + 1,
13654 htab->tls_get_addr,
13655 htab->tls_get_addr_fd))
13656 offset = rel[1].r_offset;
13657 /* We read the low GOT_TLS (or TOC16) insn because we
13658 need to keep the destination reg. It may be
13659 something other than the usual r3, and moved to r3
13660 before the call by intervening code. */
13661 insn1 = bfd_get_32 (output_bfd,
13662 contents + rel->r_offset - d_offset);
13663 if ((tls_mask & tls_gd) != 0)
13664 {
13665 /* IE */
13666 insn1 &= (0x1f << 21) | (0x1f << 16);
13667 insn1 |= 58 << 26; /* ld */
13668 insn2 = 0x7c636a14; /* add 3,3,13 */
13669 if (offset != (bfd_vma) -1)
13670 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13671 if ((tls_mask & TLS_EXPLICIT) == 0)
13672 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13673 + R_PPC64_GOT_TPREL16_DS);
13674 else
13675 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13676 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13677 }
13678 else
13679 {
13680 /* LE */
13681 insn1 &= 0x1f << 21;
13682 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13683 insn2 = 0x38630000; /* addi 3,3,0 */
13684 if (tls_gd == 0)
13685 {
13686 /* Was an LD reloc. */
13687 if (toc_symndx)
13688 sec = local_sections[toc_symndx];
13689 for (r_symndx = 0;
13690 r_symndx < symtab_hdr->sh_info;
13691 r_symndx++)
13692 if (local_sections[r_symndx] == sec)
13693 break;
13694 if (r_symndx >= symtab_hdr->sh_info)
13695 r_symndx = STN_UNDEF;
13696 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13697 if (r_symndx != STN_UNDEF)
13698 rel->r_addend -= (local_syms[r_symndx].st_value
13699 + sec->output_offset
13700 + sec->output_section->vma);
13701 }
13702 else if (toc_symndx != 0)
13703 {
13704 r_symndx = toc_symndx;
13705 rel->r_addend = toc_addend;
13706 }
13707 r_type = R_PPC64_TPREL16_HA;
13708 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13709 if (offset != (bfd_vma) -1)
13710 {
13711 rel[1].r_info = ELF64_R_INFO (r_symndx,
13712 R_PPC64_TPREL16_LO);
13713 rel[1].r_offset = offset + d_offset;
13714 rel[1].r_addend = rel->r_addend;
13715 }
13716 }
13717 bfd_put_32 (output_bfd, insn1,
13718 contents + rel->r_offset - d_offset);
13719 if (offset != (bfd_vma) -1)
13720 {
13721 insn3 = bfd_get_32 (output_bfd,
13722 contents + offset + 4);
13723 if (insn3 == NOP
13724 || insn3 == CROR_151515 || insn3 == CROR_313131)
13725 {
13726 rel[1].r_offset += 4;
13727 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13728 insn2 = NOP;
13729 }
13730 bfd_put_32 (output_bfd, insn2, contents + offset);
13731 }
13732 if ((tls_mask & tls_gd) == 0
13733 && (tls_gd == 0 || toc_symndx != 0))
13734 {
13735 /* We changed the symbol. Start over in order
13736 to get h, sym, sec etc. right. */
13737 goto again;
13738 }
13739 }
13740 break;
13741
13742 case R_PPC64_TLSGD:
13743 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13744 {
13745 unsigned int insn2, insn3;
13746 bfd_vma offset = rel->r_offset;
13747
13748 if ((tls_mask & TLS_TPRELGD) != 0)
13749 {
13750 /* IE */
13751 r_type = R_PPC64_NONE;
13752 insn2 = 0x7c636a14; /* add 3,3,13 */
13753 }
13754 else
13755 {
13756 /* LE */
13757 if (toc_symndx != 0)
13758 {
13759 r_symndx = toc_symndx;
13760 rel->r_addend = toc_addend;
13761 }
13762 r_type = R_PPC64_TPREL16_LO;
13763 rel->r_offset = offset + d_offset;
13764 insn2 = 0x38630000; /* addi 3,3,0 */
13765 }
13766 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13767 /* Zap the reloc on the _tls_get_addr call too. */
13768 BFD_ASSERT (offset == rel[1].r_offset);
13769 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13770 insn3 = bfd_get_32 (output_bfd,
13771 contents + offset + 4);
13772 if (insn3 == NOP
13773 || insn3 == CROR_151515 || insn3 == CROR_313131)
13774 {
13775 rel->r_offset += 4;
13776 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13777 insn2 = NOP;
13778 }
13779 bfd_put_32 (output_bfd, insn2, contents + offset);
13780 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13781 goto again;
13782 }
13783 break;
13784
13785 case R_PPC64_TLSLD:
13786 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13787 {
13788 unsigned int insn2, insn3;
13789 bfd_vma offset = rel->r_offset;
13790
13791 if (toc_symndx)
13792 sec = local_sections[toc_symndx];
13793 for (r_symndx = 0;
13794 r_symndx < symtab_hdr->sh_info;
13795 r_symndx++)
13796 if (local_sections[r_symndx] == sec)
13797 break;
13798 if (r_symndx >= symtab_hdr->sh_info)
13799 r_symndx = STN_UNDEF;
13800 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13801 if (r_symndx != STN_UNDEF)
13802 rel->r_addend -= (local_syms[r_symndx].st_value
13803 + sec->output_offset
13804 + sec->output_section->vma);
13805
13806 r_type = R_PPC64_TPREL16_LO;
13807 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13808 rel->r_offset = offset + d_offset;
13809 /* Zap the reloc on the _tls_get_addr call too. */
13810 BFD_ASSERT (offset == rel[1].r_offset);
13811 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13812 insn2 = 0x38630000; /* addi 3,3,0 */
13813 insn3 = bfd_get_32 (output_bfd,
13814 contents + offset + 4);
13815 if (insn3 == NOP
13816 || insn3 == CROR_151515 || insn3 == CROR_313131)
13817 {
13818 rel->r_offset += 4;
13819 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13820 insn2 = NOP;
13821 }
13822 bfd_put_32 (output_bfd, insn2, contents + offset);
13823 goto again;
13824 }
13825 break;
13826
13827 case R_PPC64_DTPMOD64:
13828 if (rel + 1 < relend
13829 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13830 && rel[1].r_offset == rel->r_offset + 8)
13831 {
13832 if ((tls_mask & TLS_GD) == 0)
13833 {
13834 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13835 if ((tls_mask & TLS_TPRELGD) != 0)
13836 r_type = R_PPC64_TPREL64;
13837 else
13838 {
13839 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13840 r_type = R_PPC64_NONE;
13841 }
13842 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13843 }
13844 }
13845 else
13846 {
13847 if ((tls_mask & TLS_LD) == 0)
13848 {
13849 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13850 r_type = R_PPC64_NONE;
13851 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13852 }
13853 }
13854 break;
13855
13856 case R_PPC64_TPREL64:
13857 if ((tls_mask & TLS_TPREL) == 0)
13858 {
13859 r_type = R_PPC64_NONE;
13860 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13861 }
13862 break;
13863
13864 case R_PPC64_ENTRY:
13865 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13866 if (!bfd_link_pic (info)
13867 && !info->traditional_format
13868 && relocation + 0x80008000 <= 0xffffffff)
13869 {
13870 unsigned int insn1, insn2;
13871
13872 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13873 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13874 if ((insn1 & ~0xfffc) == LD_R2_0R12
13875 && insn2 == ADD_R2_R2_R12)
13876 {
13877 bfd_put_32 (output_bfd,
13878 LIS_R2 + PPC_HA (relocation),
13879 contents + rel->r_offset);
13880 bfd_put_32 (output_bfd,
13881 ADDI_R2_R2 + PPC_LO (relocation),
13882 contents + rel->r_offset + 4);
13883 }
13884 }
13885 else
13886 {
13887 relocation -= (rel->r_offset
13888 + input_section->output_offset
13889 + input_section->output_section->vma);
13890 if (relocation + 0x80008000 <= 0xffffffff)
13891 {
13892 unsigned int insn1, insn2;
13893
13894 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13895 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13896 if ((insn1 & ~0xfffc) == LD_R2_0R12
13897 && insn2 == ADD_R2_R2_R12)
13898 {
13899 bfd_put_32 (output_bfd,
13900 ADDIS_R2_R12 + PPC_HA (relocation),
13901 contents + rel->r_offset);
13902 bfd_put_32 (output_bfd,
13903 ADDI_R2_R2 + PPC_LO (relocation),
13904 contents + rel->r_offset + 4);
13905 }
13906 }
13907 }
13908 break;
13909
13910 case R_PPC64_REL16_HA:
13911 /* If we are generating a non-PIC executable, edit
13912 . 0: addis 2,12,.TOC.-0b@ha
13913 . addi 2,2,.TOC.-0b@l
13914 used by ELFv2 global entry points to set up r2, to
13915 . lis 2,.TOC.@ha
13916 . addi 2,2,.TOC.@l
13917 if .TOC. is in range. */
13918 if (!bfd_link_pic (info)
13919 && !info->traditional_format
13920 && !htab->opd_abi
13921 && rel->r_addend == d_offset
13922 && h != NULL && &h->elf == htab->elf.hgot
13923 && rel + 1 < relend
13924 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13925 && rel[1].r_offset == rel->r_offset + 4
13926 && rel[1].r_addend == rel->r_addend + 4
13927 && relocation + 0x80008000 <= 0xffffffff)
13928 {
13929 unsigned int insn1, insn2;
13930 bfd_vma offset = rel->r_offset - d_offset;
13931 insn1 = bfd_get_32 (output_bfd, contents + offset);
13932 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13933 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
13934 && (insn2 & 0xffff0000) == ADDI_R2_R2)
13935 {
13936 r_type = R_PPC64_ADDR16_HA;
13937 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13938 rel->r_addend -= d_offset;
13939 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13940 rel[1].r_addend -= d_offset + 4;
13941 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
13942 }
13943 }
13944 break;
13945 }
13946
13947 /* Handle other relocations that tweak non-addend part of insn. */
13948 insn = 0;
13949 max_br_offset = 1 << 25;
13950 addend = rel->r_addend;
13951 reloc_dest = DEST_NORMAL;
13952 switch (r_type)
13953 {
13954 default:
13955 break;
13956
13957 case R_PPC64_TOCSAVE:
13958 if (relocation + addend == (rel->r_offset
13959 + input_section->output_offset
13960 + input_section->output_section->vma)
13961 && tocsave_find (htab, NO_INSERT,
13962 &local_syms, rel, input_bfd))
13963 {
13964 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13965 if (insn == NOP
13966 || insn == CROR_151515 || insn == CROR_313131)
13967 bfd_put_32 (input_bfd,
13968 STD_R2_0R1 + STK_TOC (htab),
13969 contents + rel->r_offset);
13970 }
13971 break;
13972
13973 /* Branch taken prediction relocations. */
13974 case R_PPC64_ADDR14_BRTAKEN:
13975 case R_PPC64_REL14_BRTAKEN:
13976 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13977 /* Fall thru. */
13978
13979 /* Branch not taken prediction relocations. */
13980 case R_PPC64_ADDR14_BRNTAKEN:
13981 case R_PPC64_REL14_BRNTAKEN:
13982 insn |= bfd_get_32 (output_bfd,
13983 contents + rel->r_offset) & ~(0x01 << 21);
13984 /* Fall thru. */
13985
13986 case R_PPC64_REL14:
13987 max_br_offset = 1 << 15;
13988 /* Fall thru. */
13989
13990 case R_PPC64_REL24:
13991 /* Calls to functions with a different TOC, such as calls to
13992 shared objects, need to alter the TOC pointer. This is
13993 done using a linkage stub. A REL24 branching to these
13994 linkage stubs needs to be followed by a nop, as the nop
13995 will be replaced with an instruction to restore the TOC
13996 base pointer. */
13997 fdh = h;
13998 if (h != NULL
13999 && h->oh != NULL
14000 && h->oh->is_func_descriptor)
14001 fdh = ppc_follow_link (h->oh);
14002 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14003 htab);
14004 if (stub_entry != NULL
14005 && (stub_entry->stub_type == ppc_stub_plt_call
14006 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14007 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14008 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14009 {
14010 bfd_boolean can_plt_call = FALSE;
14011
14012 /* All of these stubs will modify r2, so there must be a
14013 branch and link followed by a nop. The nop is
14014 replaced by an insn to restore r2. */
14015 if (rel->r_offset + 8 <= input_section->size)
14016 {
14017 unsigned long br;
14018
14019 br = bfd_get_32 (input_bfd,
14020 contents + rel->r_offset);
14021 if ((br & 1) != 0)
14022 {
14023 unsigned long nop;
14024
14025 nop = bfd_get_32 (input_bfd,
14026 contents + rel->r_offset + 4);
14027 if (nop == NOP
14028 || nop == CROR_151515 || nop == CROR_313131)
14029 {
14030 if (h != NULL
14031 && (h == htab->tls_get_addr_fd
14032 || h == htab->tls_get_addr)
14033 && htab->params->tls_get_addr_opt)
14034 {
14035 /* Special stub used, leave nop alone. */
14036 }
14037 else
14038 bfd_put_32 (input_bfd,
14039 LD_R2_0R1 + STK_TOC (htab),
14040 contents + rel->r_offset + 4);
14041 can_plt_call = TRUE;
14042 }
14043 }
14044 }
14045
14046 if (!can_plt_call && h != NULL)
14047 {
14048 const char *name = h->elf.root.root.string;
14049
14050 if (*name == '.')
14051 ++name;
14052
14053 if (strncmp (name, "__libc_start_main", 17) == 0
14054 && (name[17] == 0 || name[17] == '@'))
14055 {
14056 /* Allow crt1 branch to go via a toc adjusting
14057 stub. Other calls that never return could do
14058 the same, if we could detect such. */
14059 can_plt_call = TRUE;
14060 }
14061 }
14062
14063 if (!can_plt_call)
14064 {
14065 /* g++ as of 20130507 emits self-calls without a
14066 following nop. This is arguably wrong since we
14067 have conflicting information. On the one hand a
14068 global symbol and on the other a local call
14069 sequence, but don't error for this special case.
14070 It isn't possible to cheaply verify we have
14071 exactly such a call. Allow all calls to the same
14072 section. */
14073 asection *code_sec = sec;
14074
14075 if (get_opd_info (sec) != NULL)
14076 {
14077 bfd_vma off = (relocation + addend
14078 - sec->output_section->vma
14079 - sec->output_offset);
14080
14081 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14082 }
14083 if (code_sec == input_section)
14084 can_plt_call = TRUE;
14085 }
14086
14087 if (!can_plt_call)
14088 {
14089 if (stub_entry->stub_type == ppc_stub_plt_call
14090 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14091 info->callbacks->einfo
14092 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14093 "recompile with -fPIC\n"),
14094 input_bfd, input_section, rel->r_offset, sym_name);
14095 else
14096 info->callbacks->einfo
14097 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14098 "(-mcmodel=small toc adjust stub)\n"),
14099 input_bfd, input_section, rel->r_offset, sym_name);
14100
14101 bfd_set_error (bfd_error_bad_value);
14102 ret = FALSE;
14103 }
14104
14105 if (can_plt_call
14106 && (stub_entry->stub_type == ppc_stub_plt_call
14107 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14108 unresolved_reloc = FALSE;
14109 }
14110
14111 if ((stub_entry == NULL
14112 || stub_entry->stub_type == ppc_stub_long_branch
14113 || stub_entry->stub_type == ppc_stub_plt_branch)
14114 && get_opd_info (sec) != NULL)
14115 {
14116 /* The branch destination is the value of the opd entry. */
14117 bfd_vma off = (relocation + addend
14118 - sec->output_section->vma
14119 - sec->output_offset);
14120 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14121 if (dest != (bfd_vma) -1)
14122 {
14123 relocation = dest;
14124 addend = 0;
14125 reloc_dest = DEST_OPD;
14126 }
14127 }
14128
14129 /* If the branch is out of reach we ought to have a long
14130 branch stub. */
14131 from = (rel->r_offset
14132 + input_section->output_offset
14133 + input_section->output_section->vma);
14134
14135 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14136 ? fdh->elf.other
14137 : sym->st_other);
14138
14139 if (stub_entry != NULL
14140 && (stub_entry->stub_type == ppc_stub_long_branch
14141 || stub_entry->stub_type == ppc_stub_plt_branch)
14142 && (r_type == R_PPC64_ADDR14_BRTAKEN
14143 || r_type == R_PPC64_ADDR14_BRNTAKEN
14144 || (relocation + addend - from + max_br_offset
14145 < 2 * max_br_offset)))
14146 /* Don't use the stub if this branch is in range. */
14147 stub_entry = NULL;
14148
14149 if (stub_entry != NULL)
14150 {
14151 /* Munge up the value and addend so that we call the stub
14152 rather than the procedure directly. */
14153 asection *stub_sec = stub_entry->group->stub_sec;
14154
14155 if (stub_entry->stub_type == ppc_stub_save_res)
14156 relocation += (stub_sec->output_offset
14157 + stub_sec->output_section->vma
14158 + stub_sec->size - htab->sfpr->size
14159 - htab->sfpr->output_offset
14160 - htab->sfpr->output_section->vma);
14161 else
14162 relocation = (stub_entry->stub_offset
14163 + stub_sec->output_offset
14164 + stub_sec->output_section->vma);
14165 addend = 0;
14166 reloc_dest = DEST_STUB;
14167
14168 if ((stub_entry->stub_type == ppc_stub_plt_call
14169 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14170 && (ALWAYS_EMIT_R2SAVE
14171 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14172 && rel + 1 < relend
14173 && rel[1].r_offset == rel->r_offset + 4
14174 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14175 relocation += 4;
14176 }
14177
14178 if (insn != 0)
14179 {
14180 if (is_isa_v2)
14181 {
14182 /* Set 'a' bit. This is 0b00010 in BO field for branch
14183 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14184 for branch on CTR insns (BO == 1a00t or 1a01t). */
14185 if ((insn & (0x14 << 21)) == (0x04 << 21))
14186 insn |= 0x02 << 21;
14187 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14188 insn |= 0x08 << 21;
14189 else
14190 break;
14191 }
14192 else
14193 {
14194 /* Invert 'y' bit if not the default. */
14195 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14196 insn ^= 0x01 << 21;
14197 }
14198
14199 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
14200 }
14201
14202 /* NOP out calls to undefined weak functions.
14203 We can thus call a weak function without first
14204 checking whether the function is defined. */
14205 else if (h != NULL
14206 && h->elf.root.type == bfd_link_hash_undefweak
14207 && h->elf.dynindx == -1
14208 && r_type == R_PPC64_REL24
14209 && relocation == 0
14210 && addend == 0)
14211 {
14212 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
14213 goto copy_reloc;
14214 }
14215 break;
14216 }
14217
14218 /* Set `addend'. */
14219 tls_type = 0;
14220 switch (r_type)
14221 {
14222 default:
14223 info->callbacks->einfo
14224 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14225 input_bfd, (int) r_type, sym_name);
14226
14227 bfd_set_error (bfd_error_bad_value);
14228 ret = FALSE;
14229 goto copy_reloc;
14230
14231 case R_PPC64_NONE:
14232 case R_PPC64_TLS:
14233 case R_PPC64_TLSGD:
14234 case R_PPC64_TLSLD:
14235 case R_PPC64_TOCSAVE:
14236 case R_PPC64_GNU_VTINHERIT:
14237 case R_PPC64_GNU_VTENTRY:
14238 case R_PPC64_ENTRY:
14239 goto copy_reloc;
14240
14241 /* GOT16 relocations. Like an ADDR16 using the symbol's
14242 address in the GOT as relocation value instead of the
14243 symbol's value itself. Also, create a GOT entry for the
14244 symbol and put the symbol value there. */
14245 case R_PPC64_GOT_TLSGD16:
14246 case R_PPC64_GOT_TLSGD16_LO:
14247 case R_PPC64_GOT_TLSGD16_HI:
14248 case R_PPC64_GOT_TLSGD16_HA:
14249 tls_type = TLS_TLS | TLS_GD;
14250 goto dogot;
14251
14252 case R_PPC64_GOT_TLSLD16:
14253 case R_PPC64_GOT_TLSLD16_LO:
14254 case R_PPC64_GOT_TLSLD16_HI:
14255 case R_PPC64_GOT_TLSLD16_HA:
14256 tls_type = TLS_TLS | TLS_LD;
14257 goto dogot;
14258
14259 case R_PPC64_GOT_TPREL16_DS:
14260 case R_PPC64_GOT_TPREL16_LO_DS:
14261 case R_PPC64_GOT_TPREL16_HI:
14262 case R_PPC64_GOT_TPREL16_HA:
14263 tls_type = TLS_TLS | TLS_TPREL;
14264 goto dogot;
14265
14266 case R_PPC64_GOT_DTPREL16_DS:
14267 case R_PPC64_GOT_DTPREL16_LO_DS:
14268 case R_PPC64_GOT_DTPREL16_HI:
14269 case R_PPC64_GOT_DTPREL16_HA:
14270 tls_type = TLS_TLS | TLS_DTPREL;
14271 goto dogot;
14272
14273 case R_PPC64_GOT16:
14274 case R_PPC64_GOT16_LO:
14275 case R_PPC64_GOT16_HI:
14276 case R_PPC64_GOT16_HA:
14277 case R_PPC64_GOT16_DS:
14278 case R_PPC64_GOT16_LO_DS:
14279 dogot:
14280 {
14281 /* Relocation is to the entry for this symbol in the global
14282 offset table. */
14283 asection *got;
14284 bfd_vma *offp;
14285 bfd_vma off;
14286 unsigned long indx = 0;
14287 struct got_entry *ent;
14288
14289 if (tls_type == (TLS_TLS | TLS_LD)
14290 && (h == NULL
14291 || !h->elf.def_dynamic))
14292 ent = ppc64_tlsld_got (input_bfd);
14293 else
14294 {
14295
14296 if (h != NULL)
14297 {
14298 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14299 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14300 &h->elf)
14301 || (bfd_link_pic (info)
14302 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14303 /* This is actually a static link, or it is a
14304 -Bsymbolic link and the symbol is defined
14305 locally, or the symbol was forced to be local
14306 because of a version file. */
14307 ;
14308 else
14309 {
14310 BFD_ASSERT (h->elf.dynindx != -1);
14311 indx = h->elf.dynindx;
14312 unresolved_reloc = FALSE;
14313 }
14314 ent = h->elf.got.glist;
14315 }
14316 else
14317 {
14318 if (local_got_ents == NULL)
14319 abort ();
14320 ent = local_got_ents[r_symndx];
14321 }
14322
14323 for (; ent != NULL; ent = ent->next)
14324 if (ent->addend == orig_rel.r_addend
14325 && ent->owner == input_bfd
14326 && ent->tls_type == tls_type)
14327 break;
14328 }
14329
14330 if (ent == NULL)
14331 abort ();
14332 if (ent->is_indirect)
14333 ent = ent->got.ent;
14334 offp = &ent->got.offset;
14335 got = ppc64_elf_tdata (ent->owner)->got;
14336 if (got == NULL)
14337 abort ();
14338
14339 /* The offset must always be a multiple of 8. We use the
14340 least significant bit to record whether we have already
14341 processed this entry. */
14342 off = *offp;
14343 if ((off & 1) != 0)
14344 off &= ~1;
14345 else
14346 {
14347 /* Generate relocs for the dynamic linker, except in
14348 the case of TLSLD where we'll use one entry per
14349 module. */
14350 asection *relgot;
14351 bfd_boolean ifunc;
14352
14353 *offp = off | 1;
14354 relgot = NULL;
14355 ifunc = (h != NULL
14356 ? h->elf.type == STT_GNU_IFUNC
14357 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14358 if (ifunc)
14359 relgot = htab->elf.irelplt;
14360 else if ((bfd_link_pic (info) || indx != 0)
14361 && (h == NULL
14362 || (tls_type == (TLS_TLS | TLS_LD)
14363 && !h->elf.def_dynamic)
14364 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14365 || h->elf.root.type != bfd_link_hash_undefweak))
14366 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14367 if (relgot != NULL)
14368 {
14369 outrel.r_offset = (got->output_section->vma
14370 + got->output_offset
14371 + off);
14372 outrel.r_addend = addend;
14373 if (tls_type & (TLS_LD | TLS_GD))
14374 {
14375 outrel.r_addend = 0;
14376 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14377 if (tls_type == (TLS_TLS | TLS_GD))
14378 {
14379 loc = relgot->contents;
14380 loc += (relgot->reloc_count++
14381 * sizeof (Elf64_External_Rela));
14382 bfd_elf64_swap_reloca_out (output_bfd,
14383 &outrel, loc);
14384 outrel.r_offset += 8;
14385 outrel.r_addend = addend;
14386 outrel.r_info
14387 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14388 }
14389 }
14390 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14391 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14392 else if (tls_type == (TLS_TLS | TLS_TPREL))
14393 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14394 else if (indx != 0)
14395 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14396 else
14397 {
14398 if (ifunc)
14399 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14400 else
14401 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14402
14403 /* Write the .got section contents for the sake
14404 of prelink. */
14405 loc = got->contents + off;
14406 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14407 loc);
14408 }
14409
14410 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14411 {
14412 outrel.r_addend += relocation;
14413 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14414 {
14415 if (htab->elf.tls_sec == NULL)
14416 outrel.r_addend = 0;
14417 else
14418 outrel.r_addend -= htab->elf.tls_sec->vma;
14419 }
14420 }
14421 loc = relgot->contents;
14422 loc += (relgot->reloc_count++
14423 * sizeof (Elf64_External_Rela));
14424 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14425 }
14426
14427 /* Init the .got section contents here if we're not
14428 emitting a reloc. */
14429 else
14430 {
14431 relocation += addend;
14432 if (tls_type == (TLS_TLS | TLS_LD))
14433 relocation = 1;
14434 else if (tls_type != 0)
14435 {
14436 if (htab->elf.tls_sec == NULL)
14437 relocation = 0;
14438 else
14439 {
14440 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14441 if (tls_type == (TLS_TLS | TLS_TPREL))
14442 relocation += DTP_OFFSET - TP_OFFSET;
14443 }
14444
14445 if (tls_type == (TLS_TLS | TLS_GD))
14446 {
14447 bfd_put_64 (output_bfd, relocation,
14448 got->contents + off + 8);
14449 relocation = 1;
14450 }
14451 }
14452
14453 bfd_put_64 (output_bfd, relocation,
14454 got->contents + off);
14455 }
14456 }
14457
14458 if (off >= (bfd_vma) -2)
14459 abort ();
14460
14461 relocation = got->output_section->vma + got->output_offset + off;
14462 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14463 }
14464 break;
14465
14466 case R_PPC64_PLT16_HA:
14467 case R_PPC64_PLT16_HI:
14468 case R_PPC64_PLT16_LO:
14469 case R_PPC64_PLT32:
14470 case R_PPC64_PLT64:
14471 /* Relocation is to the entry for this symbol in the
14472 procedure linkage table. */
14473 {
14474 struct plt_entry **plt_list = NULL;
14475 if (h != NULL)
14476 plt_list = &h->elf.plt.plist;
14477 else if (local_got_ents != NULL)
14478 {
14479 struct plt_entry **local_plt = (struct plt_entry **)
14480 (local_got_ents + symtab_hdr->sh_info);
14481 unsigned char *local_got_tls_masks = (unsigned char *)
14482 (local_plt + symtab_hdr->sh_info);
14483 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14484 plt_list = local_plt + r_symndx;
14485 }
14486 if (plt_list)
14487 {
14488 struct plt_entry *ent;
14489
14490 for (ent = *plt_list; ent != NULL; ent = ent->next)
14491 if (ent->plt.offset != (bfd_vma) -1
14492 && ent->addend == orig_rel.r_addend)
14493 {
14494 asection *plt;
14495
14496 plt = htab->elf.splt;
14497 if (!htab->elf.dynamic_sections_created
14498 || h == NULL
14499 || h->elf.dynindx == -1)
14500 plt = htab->elf.iplt;
14501 relocation = (plt->output_section->vma
14502 + plt->output_offset
14503 + ent->plt.offset);
14504 addend = 0;
14505 unresolved_reloc = FALSE;
14506 break;
14507 }
14508 }
14509 }
14510 break;
14511
14512 case R_PPC64_TOC:
14513 /* Relocation value is TOC base. */
14514 relocation = TOCstart;
14515 if (r_symndx == STN_UNDEF)
14516 relocation += htab->sec_info[input_section->id].toc_off;
14517 else if (unresolved_reloc)
14518 ;
14519 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14520 relocation += htab->sec_info[sec->id].toc_off;
14521 else
14522 unresolved_reloc = TRUE;
14523 goto dodyn;
14524
14525 /* TOC16 relocs. We want the offset relative to the TOC base,
14526 which is the address of the start of the TOC plus 0x8000.
14527 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14528 in this order. */
14529 case R_PPC64_TOC16:
14530 case R_PPC64_TOC16_LO:
14531 case R_PPC64_TOC16_HI:
14532 case R_PPC64_TOC16_DS:
14533 case R_PPC64_TOC16_LO_DS:
14534 case R_PPC64_TOC16_HA:
14535 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14536 break;
14537
14538 /* Relocate against the beginning of the section. */
14539 case R_PPC64_SECTOFF:
14540 case R_PPC64_SECTOFF_LO:
14541 case R_PPC64_SECTOFF_HI:
14542 case R_PPC64_SECTOFF_DS:
14543 case R_PPC64_SECTOFF_LO_DS:
14544 case R_PPC64_SECTOFF_HA:
14545 if (sec != NULL)
14546 addend -= sec->output_section->vma;
14547 break;
14548
14549 case R_PPC64_REL16:
14550 case R_PPC64_REL16_LO:
14551 case R_PPC64_REL16_HI:
14552 case R_PPC64_REL16_HA:
14553 case R_PPC64_REL16DX_HA:
14554 break;
14555
14556 case R_PPC64_REL14:
14557 case R_PPC64_REL14_BRNTAKEN:
14558 case R_PPC64_REL14_BRTAKEN:
14559 case R_PPC64_REL24:
14560 break;
14561
14562 case R_PPC64_TPREL16:
14563 case R_PPC64_TPREL16_LO:
14564 case R_PPC64_TPREL16_HI:
14565 case R_PPC64_TPREL16_HA:
14566 case R_PPC64_TPREL16_DS:
14567 case R_PPC64_TPREL16_LO_DS:
14568 case R_PPC64_TPREL16_HIGH:
14569 case R_PPC64_TPREL16_HIGHA:
14570 case R_PPC64_TPREL16_HIGHER:
14571 case R_PPC64_TPREL16_HIGHERA:
14572 case R_PPC64_TPREL16_HIGHEST:
14573 case R_PPC64_TPREL16_HIGHESTA:
14574 if (h != NULL
14575 && h->elf.root.type == bfd_link_hash_undefweak
14576 && h->elf.dynindx == -1)
14577 {
14578 /* Make this relocation against an undefined weak symbol
14579 resolve to zero. This is really just a tweak, since
14580 code using weak externs ought to check that they are
14581 defined before using them. */
14582 bfd_byte *p = contents + rel->r_offset - d_offset;
14583
14584 insn = bfd_get_32 (output_bfd, p);
14585 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14586 if (insn != 0)
14587 bfd_put_32 (output_bfd, insn, p);
14588 break;
14589 }
14590 if (htab->elf.tls_sec != NULL)
14591 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14592 if (bfd_link_pic (info))
14593 /* The TPREL16 relocs shouldn't really be used in shared
14594 libs as they will result in DT_TEXTREL being set, but
14595 support them anyway. */
14596 goto dodyn;
14597 break;
14598
14599 case R_PPC64_DTPREL16:
14600 case R_PPC64_DTPREL16_LO:
14601 case R_PPC64_DTPREL16_HI:
14602 case R_PPC64_DTPREL16_HA:
14603 case R_PPC64_DTPREL16_DS:
14604 case R_PPC64_DTPREL16_LO_DS:
14605 case R_PPC64_DTPREL16_HIGH:
14606 case R_PPC64_DTPREL16_HIGHA:
14607 case R_PPC64_DTPREL16_HIGHER:
14608 case R_PPC64_DTPREL16_HIGHERA:
14609 case R_PPC64_DTPREL16_HIGHEST:
14610 case R_PPC64_DTPREL16_HIGHESTA:
14611 if (htab->elf.tls_sec != NULL)
14612 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14613 break;
14614
14615 case R_PPC64_ADDR64_LOCAL:
14616 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14617 ? h->elf.other
14618 : sym->st_other);
14619 break;
14620
14621 case R_PPC64_DTPMOD64:
14622 relocation = 1;
14623 addend = 0;
14624 goto dodyn;
14625
14626 case R_PPC64_TPREL64:
14627 if (htab->elf.tls_sec != NULL)
14628 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14629 goto dodyn;
14630
14631 case R_PPC64_DTPREL64:
14632 if (htab->elf.tls_sec != NULL)
14633 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14634 /* Fall thru */
14635
14636 /* Relocations that may need to be propagated if this is a
14637 dynamic object. */
14638 case R_PPC64_REL30:
14639 case R_PPC64_REL32:
14640 case R_PPC64_REL64:
14641 case R_PPC64_ADDR14:
14642 case R_PPC64_ADDR14_BRNTAKEN:
14643 case R_PPC64_ADDR14_BRTAKEN:
14644 case R_PPC64_ADDR16:
14645 case R_PPC64_ADDR16_DS:
14646 case R_PPC64_ADDR16_HA:
14647 case R_PPC64_ADDR16_HI:
14648 case R_PPC64_ADDR16_HIGH:
14649 case R_PPC64_ADDR16_HIGHA:
14650 case R_PPC64_ADDR16_HIGHER:
14651 case R_PPC64_ADDR16_HIGHERA:
14652 case R_PPC64_ADDR16_HIGHEST:
14653 case R_PPC64_ADDR16_HIGHESTA:
14654 case R_PPC64_ADDR16_LO:
14655 case R_PPC64_ADDR16_LO_DS:
14656 case R_PPC64_ADDR24:
14657 case R_PPC64_ADDR32:
14658 case R_PPC64_ADDR64:
14659 case R_PPC64_UADDR16:
14660 case R_PPC64_UADDR32:
14661 case R_PPC64_UADDR64:
14662 dodyn:
14663 if ((input_section->flags & SEC_ALLOC) == 0)
14664 break;
14665
14666 if (NO_OPD_RELOCS && is_opd)
14667 break;
14668
14669 if ((bfd_link_pic (info)
14670 && (h == NULL
14671 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14672 || h->elf.root.type != bfd_link_hash_undefweak)
14673 && (must_be_dyn_reloc (info, r_type)
14674 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14675 || (ELIMINATE_COPY_RELOCS
14676 && !bfd_link_pic (info)
14677 && h != NULL
14678 && h->elf.dynindx != -1
14679 && !h->elf.non_got_ref
14680 && !h->elf.def_regular)
14681 || (!bfd_link_pic (info)
14682 && (h != NULL
14683 ? h->elf.type == STT_GNU_IFUNC
14684 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14685 {
14686 bfd_boolean skip, relocate;
14687 asection *sreloc;
14688 bfd_vma out_off;
14689
14690 /* When generating a dynamic object, these relocations
14691 are copied into the output file to be resolved at run
14692 time. */
14693
14694 skip = FALSE;
14695 relocate = FALSE;
14696
14697 out_off = _bfd_elf_section_offset (output_bfd, info,
14698 input_section, rel->r_offset);
14699 if (out_off == (bfd_vma) -1)
14700 skip = TRUE;
14701 else if (out_off == (bfd_vma) -2)
14702 skip = TRUE, relocate = TRUE;
14703 out_off += (input_section->output_section->vma
14704 + input_section->output_offset);
14705 outrel.r_offset = out_off;
14706 outrel.r_addend = rel->r_addend;
14707
14708 /* Optimize unaligned reloc use. */
14709 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14710 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14711 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14712 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14713 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14714 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14715 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14716 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14717 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14718
14719 if (skip)
14720 memset (&outrel, 0, sizeof outrel);
14721 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14722 && !is_opd
14723 && r_type != R_PPC64_TOC)
14724 {
14725 BFD_ASSERT (h->elf.dynindx != -1);
14726 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14727 }
14728 else
14729 {
14730 /* This symbol is local, or marked to become local,
14731 or this is an opd section reloc which must point
14732 at a local function. */
14733 outrel.r_addend += relocation;
14734 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14735 {
14736 if (is_opd && h != NULL)
14737 {
14738 /* Lie about opd entries. This case occurs
14739 when building shared libraries and we
14740 reference a function in another shared
14741 lib. The same thing happens for a weak
14742 definition in an application that's
14743 overridden by a strong definition in a
14744 shared lib. (I believe this is a generic
14745 bug in binutils handling of weak syms.)
14746 In these cases we won't use the opd
14747 entry in this lib. */
14748 unresolved_reloc = FALSE;
14749 }
14750 if (!is_opd
14751 && r_type == R_PPC64_ADDR64
14752 && (h != NULL
14753 ? h->elf.type == STT_GNU_IFUNC
14754 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14755 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14756 else
14757 {
14758 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14759
14760 /* We need to relocate .opd contents for ld.so.
14761 Prelink also wants simple and consistent rules
14762 for relocs. This make all RELATIVE relocs have
14763 *r_offset equal to r_addend. */
14764 relocate = TRUE;
14765 }
14766 }
14767 else
14768 {
14769 long indx = 0;
14770
14771 if (h != NULL
14772 ? h->elf.type == STT_GNU_IFUNC
14773 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14774 {
14775 info->callbacks->einfo
14776 (_("%P: %H: %s for indirect "
14777 "function `%T' unsupported\n"),
14778 input_bfd, input_section, rel->r_offset,
14779 ppc64_elf_howto_table[r_type]->name,
14780 sym_name);
14781 ret = FALSE;
14782 }
14783 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14784 ;
14785 else if (sec == NULL || sec->owner == NULL)
14786 {
14787 bfd_set_error (bfd_error_bad_value);
14788 return FALSE;
14789 }
14790 else
14791 {
14792 asection *osec;
14793
14794 osec = sec->output_section;
14795 indx = elf_section_data (osec)->dynindx;
14796
14797 if (indx == 0)
14798 {
14799 if ((osec->flags & SEC_READONLY) == 0
14800 && htab->elf.data_index_section != NULL)
14801 osec = htab->elf.data_index_section;
14802 else
14803 osec = htab->elf.text_index_section;
14804 indx = elf_section_data (osec)->dynindx;
14805 }
14806 BFD_ASSERT (indx != 0);
14807
14808 /* We are turning this relocation into one
14809 against a section symbol, so subtract out
14810 the output section's address but not the
14811 offset of the input section in the output
14812 section. */
14813 outrel.r_addend -= osec->vma;
14814 }
14815
14816 outrel.r_info = ELF64_R_INFO (indx, r_type);
14817 }
14818 }
14819
14820 sreloc = elf_section_data (input_section)->sreloc;
14821 if (h != NULL
14822 ? h->elf.type == STT_GNU_IFUNC
14823 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14824 sreloc = htab->elf.irelplt;
14825 if (sreloc == NULL)
14826 abort ();
14827
14828 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14829 >= sreloc->size)
14830 abort ();
14831 loc = sreloc->contents;
14832 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14833 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14834
14835 /* If this reloc is against an external symbol, it will
14836 be computed at runtime, so there's no need to do
14837 anything now. However, for the sake of prelink ensure
14838 that the section contents are a known value. */
14839 if (! relocate)
14840 {
14841 unresolved_reloc = FALSE;
14842 /* The value chosen here is quite arbitrary as ld.so
14843 ignores section contents except for the special
14844 case of .opd where the contents might be accessed
14845 before relocation. Choose zero, as that won't
14846 cause reloc overflow. */
14847 relocation = 0;
14848 addend = 0;
14849 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14850 to improve backward compatibility with older
14851 versions of ld. */
14852 if (r_type == R_PPC64_ADDR64)
14853 addend = outrel.r_addend;
14854 /* Adjust pc_relative relocs to have zero in *r_offset. */
14855 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14856 addend = (input_section->output_section->vma
14857 + input_section->output_offset
14858 + rel->r_offset);
14859 }
14860 }
14861 break;
14862
14863 case R_PPC64_COPY:
14864 case R_PPC64_GLOB_DAT:
14865 case R_PPC64_JMP_SLOT:
14866 case R_PPC64_JMP_IREL:
14867 case R_PPC64_RELATIVE:
14868 /* We shouldn't ever see these dynamic relocs in relocatable
14869 files. */
14870 /* Fall through. */
14871
14872 case R_PPC64_PLTGOT16:
14873 case R_PPC64_PLTGOT16_DS:
14874 case R_PPC64_PLTGOT16_HA:
14875 case R_PPC64_PLTGOT16_HI:
14876 case R_PPC64_PLTGOT16_LO:
14877 case R_PPC64_PLTGOT16_LO_DS:
14878 case R_PPC64_PLTREL32:
14879 case R_PPC64_PLTREL64:
14880 /* These ones haven't been implemented yet. */
14881
14882 info->callbacks->einfo
14883 (_("%P: %B: %s is not supported for `%T'\n"),
14884 input_bfd,
14885 ppc64_elf_howto_table[r_type]->name, sym_name);
14886
14887 bfd_set_error (bfd_error_invalid_operation);
14888 ret = FALSE;
14889 goto copy_reloc;
14890 }
14891
14892 /* Multi-instruction sequences that access the TOC can be
14893 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14894 to nop; addi rb,r2,x; */
14895 switch (r_type)
14896 {
14897 default:
14898 break;
14899
14900 case R_PPC64_GOT_TLSLD16_HI:
14901 case R_PPC64_GOT_TLSGD16_HI:
14902 case R_PPC64_GOT_TPREL16_HI:
14903 case R_PPC64_GOT_DTPREL16_HI:
14904 case R_PPC64_GOT16_HI:
14905 case R_PPC64_TOC16_HI:
14906 /* These relocs would only be useful if building up an
14907 offset to later add to r2, perhaps in an indexed
14908 addressing mode instruction. Don't try to optimize.
14909 Unfortunately, the possibility of someone building up an
14910 offset like this or even with the HA relocs, means that
14911 we need to check the high insn when optimizing the low
14912 insn. */
14913 break;
14914
14915 case R_PPC64_GOT_TLSLD16_HA:
14916 case R_PPC64_GOT_TLSGD16_HA:
14917 case R_PPC64_GOT_TPREL16_HA:
14918 case R_PPC64_GOT_DTPREL16_HA:
14919 case R_PPC64_GOT16_HA:
14920 case R_PPC64_TOC16_HA:
14921 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14922 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14923 {
14924 bfd_byte *p = contents + (rel->r_offset & ~3);
14925 bfd_put_32 (input_bfd, NOP, p);
14926 }
14927 break;
14928
14929 case R_PPC64_GOT_TLSLD16_LO:
14930 case R_PPC64_GOT_TLSGD16_LO:
14931 case R_PPC64_GOT_TPREL16_LO_DS:
14932 case R_PPC64_GOT_DTPREL16_LO_DS:
14933 case R_PPC64_GOT16_LO:
14934 case R_PPC64_GOT16_LO_DS:
14935 case R_PPC64_TOC16_LO:
14936 case R_PPC64_TOC16_LO_DS:
14937 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14938 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14939 {
14940 bfd_byte *p = contents + (rel->r_offset & ~3);
14941 insn = bfd_get_32 (input_bfd, p);
14942 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14943 {
14944 /* Transform addic to addi when we change reg. */
14945 insn &= ~((0x3f << 26) | (0x1f << 16));
14946 insn |= (14u << 26) | (2 << 16);
14947 }
14948 else
14949 {
14950 insn &= ~(0x1f << 16);
14951 insn |= 2 << 16;
14952 }
14953 bfd_put_32 (input_bfd, insn, p);
14954 }
14955 break;
14956 }
14957
14958 /* Do any further special processing. */
14959 howto = ppc64_elf_howto_table[(int) r_type];
14960 switch (r_type)
14961 {
14962 default:
14963 break;
14964
14965 case R_PPC64_REL16_HA:
14966 case R_PPC64_REL16DX_HA:
14967 case R_PPC64_ADDR16_HA:
14968 case R_PPC64_ADDR16_HIGHA:
14969 case R_PPC64_ADDR16_HIGHERA:
14970 case R_PPC64_ADDR16_HIGHESTA:
14971 case R_PPC64_TOC16_HA:
14972 case R_PPC64_SECTOFF_HA:
14973 case R_PPC64_TPREL16_HA:
14974 case R_PPC64_TPREL16_HIGHA:
14975 case R_PPC64_TPREL16_HIGHERA:
14976 case R_PPC64_TPREL16_HIGHESTA:
14977 case R_PPC64_DTPREL16_HA:
14978 case R_PPC64_DTPREL16_HIGHA:
14979 case R_PPC64_DTPREL16_HIGHERA:
14980 case R_PPC64_DTPREL16_HIGHESTA:
14981 /* It's just possible that this symbol is a weak symbol
14982 that's not actually defined anywhere. In that case,
14983 'sec' would be NULL, and we should leave the symbol
14984 alone (it will be set to zero elsewhere in the link). */
14985 if (sec == NULL)
14986 break;
14987 /* Fall thru */
14988
14989 case R_PPC64_GOT16_HA:
14990 case R_PPC64_PLTGOT16_HA:
14991 case R_PPC64_PLT16_HA:
14992 case R_PPC64_GOT_TLSGD16_HA:
14993 case R_PPC64_GOT_TLSLD16_HA:
14994 case R_PPC64_GOT_TPREL16_HA:
14995 case R_PPC64_GOT_DTPREL16_HA:
14996 /* Add 0x10000 if sign bit in 0:15 is set.
14997 Bits 0:15 are not used. */
14998 addend += 0x8000;
14999 break;
15000
15001 case R_PPC64_ADDR16_DS:
15002 case R_PPC64_ADDR16_LO_DS:
15003 case R_PPC64_GOT16_DS:
15004 case R_PPC64_GOT16_LO_DS:
15005 case R_PPC64_PLT16_LO_DS:
15006 case R_PPC64_SECTOFF_DS:
15007 case R_PPC64_SECTOFF_LO_DS:
15008 case R_PPC64_TOC16_DS:
15009 case R_PPC64_TOC16_LO_DS:
15010 case R_PPC64_PLTGOT16_DS:
15011 case R_PPC64_PLTGOT16_LO_DS:
15012 case R_PPC64_GOT_TPREL16_DS:
15013 case R_PPC64_GOT_TPREL16_LO_DS:
15014 case R_PPC64_GOT_DTPREL16_DS:
15015 case R_PPC64_GOT_DTPREL16_LO_DS:
15016 case R_PPC64_TPREL16_DS:
15017 case R_PPC64_TPREL16_LO_DS:
15018 case R_PPC64_DTPREL16_DS:
15019 case R_PPC64_DTPREL16_LO_DS:
15020 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15021 mask = 3;
15022 /* If this reloc is against an lq, lxv, or stxv insn, then
15023 the value must be a multiple of 16. This is somewhat of
15024 a hack, but the "correct" way to do this by defining _DQ
15025 forms of all the _DS relocs bloats all reloc switches in
15026 this file. It doesn't make much sense to use these
15027 relocs in data, so testing the insn should be safe. */
15028 if ((insn & (0x3f << 26)) == (56u << 26)
15029 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15030 mask = 15;
15031 relocation += addend;
15032 addend = insn & (mask ^ 3);
15033 if ((relocation & mask) != 0)
15034 {
15035 relocation ^= relocation & mask;
15036 info->callbacks->einfo
15037 (_("%P: %H: error: %s not a multiple of %u\n"),
15038 input_bfd, input_section, rel->r_offset,
15039 howto->name,
15040 mask + 1);
15041 bfd_set_error (bfd_error_bad_value);
15042 ret = FALSE;
15043 goto copy_reloc;
15044 }
15045 break;
15046 }
15047
15048 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15049 because such sections are not SEC_ALLOC and thus ld.so will
15050 not process them. */
15051 if (unresolved_reloc
15052 && !((input_section->flags & SEC_DEBUGGING) != 0
15053 && h->elf.def_dynamic)
15054 && _bfd_elf_section_offset (output_bfd, info, input_section,
15055 rel->r_offset) != (bfd_vma) -1)
15056 {
15057 info->callbacks->einfo
15058 (_("%P: %H: unresolvable %s against `%T'\n"),
15059 input_bfd, input_section, rel->r_offset,
15060 howto->name,
15061 h->elf.root.root.string);
15062 ret = FALSE;
15063 }
15064
15065 /* 16-bit fields in insns mostly have signed values, but a
15066 few insns have 16-bit unsigned values. Really, we should
15067 have different reloc types. */
15068 if (howto->complain_on_overflow != complain_overflow_dont
15069 && howto->dst_mask == 0xffff
15070 && (input_section->flags & SEC_CODE) != 0)
15071 {
15072 enum complain_overflow complain = complain_overflow_signed;
15073
15074 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15075 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15076 complain = complain_overflow_bitfield;
15077 else if (howto->rightshift == 0
15078 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15079 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15080 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15081 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15082 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15083 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15084 complain = complain_overflow_unsigned;
15085 if (howto->complain_on_overflow != complain)
15086 {
15087 alt_howto = *howto;
15088 alt_howto.complain_on_overflow = complain;
15089 howto = &alt_howto;
15090 }
15091 }
15092
15093 if (r_type == R_PPC64_REL16DX_HA)
15094 {
15095 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15096 if (rel->r_offset + 4 > input_section->size)
15097 r = bfd_reloc_outofrange;
15098 else
15099 {
15100 relocation += addend;
15101 relocation -= (rel->r_offset
15102 + input_section->output_offset
15103 + input_section->output_section->vma);
15104 relocation = (bfd_signed_vma) relocation >> 16;
15105 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15106 insn &= ~0x1fffc1;
15107 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15108 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15109 r = bfd_reloc_ok;
15110 if (relocation + 0x8000 > 0xffff)
15111 r = bfd_reloc_overflow;
15112 }
15113 }
15114 else
15115 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15116 rel->r_offset, relocation, addend);
15117
15118 if (r != bfd_reloc_ok)
15119 {
15120 char *more_info = NULL;
15121 const char *reloc_name = howto->name;
15122
15123 if (reloc_dest != DEST_NORMAL)
15124 {
15125 more_info = bfd_malloc (strlen (reloc_name) + 8);
15126 if (more_info != NULL)
15127 {
15128 strcpy (more_info, reloc_name);
15129 strcat (more_info, (reloc_dest == DEST_OPD
15130 ? " (OPD)" : " (stub)"));
15131 reloc_name = more_info;
15132 }
15133 }
15134
15135 if (r == bfd_reloc_overflow)
15136 {
15137 /* On code like "if (foo) foo();" don't report overflow
15138 on a branch to zero when foo is undefined. */
15139 if (!warned
15140 && (reloc_dest == DEST_STUB
15141 || !(h != NULL
15142 && (h->elf.root.type == bfd_link_hash_undefweak
15143 || h->elf.root.type == bfd_link_hash_undefined)
15144 && is_branch_reloc (r_type))))
15145 {
15146 if (!((*info->callbacks->reloc_overflow)
15147 (info, &h->elf.root, sym_name,
15148 reloc_name, orig_rel.r_addend,
15149 input_bfd, input_section, rel->r_offset)))
15150 return FALSE;
15151 }
15152 }
15153 else
15154 {
15155 info->callbacks->einfo
15156 (_("%P: %H: %s against `%T': error %d\n"),
15157 input_bfd, input_section, rel->r_offset,
15158 reloc_name, sym_name, (int) r);
15159 ret = FALSE;
15160 }
15161 if (more_info != NULL)
15162 free (more_info);
15163 }
15164 copy_reloc:
15165 if (wrel != rel)
15166 *wrel = *rel;
15167 }
15168
15169 if (wrel != rel)
15170 {
15171 Elf_Internal_Shdr *rel_hdr;
15172 size_t deleted = rel - wrel;
15173
15174 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15175 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15176 if (rel_hdr->sh_size == 0)
15177 {
15178 /* It is too late to remove an empty reloc section. Leave
15179 one NONE reloc.
15180 ??? What is wrong with an empty section??? */
15181 rel_hdr->sh_size = rel_hdr->sh_entsize;
15182 deleted -= 1;
15183 }
15184 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15185 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15186 input_section->reloc_count -= deleted;
15187 }
15188
15189 /* If we're emitting relocations, then shortly after this function
15190 returns, reloc offsets and addends for this section will be
15191 adjusted. Worse, reloc symbol indices will be for the output
15192 file rather than the input. Save a copy of the relocs for
15193 opd_entry_value. */
15194 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15195 {
15196 bfd_size_type amt;
15197 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15198 rel = bfd_alloc (input_bfd, amt);
15199 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15200 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15201 if (rel == NULL)
15202 return FALSE;
15203 memcpy (rel, relocs, amt);
15204 }
15205 return ret;
15206 }
15207
15208 /* Adjust the value of any local symbols in opd sections. */
15209
15210 static int
15211 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15212 const char *name ATTRIBUTE_UNUSED,
15213 Elf_Internal_Sym *elfsym,
15214 asection *input_sec,
15215 struct elf_link_hash_entry *h)
15216 {
15217 struct _opd_sec_data *opd;
15218 long adjust;
15219 bfd_vma value;
15220
15221 if (h != NULL)
15222 return 1;
15223
15224 opd = get_opd_info (input_sec);
15225 if (opd == NULL || opd->adjust == NULL)
15226 return 1;
15227
15228 value = elfsym->st_value - input_sec->output_offset;
15229 if (!bfd_link_relocatable (info))
15230 value -= input_sec->output_section->vma;
15231
15232 adjust = opd->adjust[OPD_NDX (value)];
15233 if (adjust == -1)
15234 return 2;
15235
15236 elfsym->st_value += adjust;
15237 return 1;
15238 }
15239
15240 /* Finish up dynamic symbol handling. We set the contents of various
15241 dynamic sections here. */
15242
15243 static bfd_boolean
15244 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15245 struct bfd_link_info *info,
15246 struct elf_link_hash_entry *h,
15247 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15248 {
15249 struct ppc_link_hash_table *htab;
15250 struct plt_entry *ent;
15251 Elf_Internal_Rela rela;
15252 bfd_byte *loc;
15253
15254 htab = ppc_hash_table (info);
15255 if (htab == NULL)
15256 return FALSE;
15257
15258 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15259 if (ent->plt.offset != (bfd_vma) -1)
15260 {
15261 /* This symbol has an entry in the procedure linkage
15262 table. Set it up. */
15263 if (!htab->elf.dynamic_sections_created
15264 || h->dynindx == -1)
15265 {
15266 BFD_ASSERT (h->type == STT_GNU_IFUNC
15267 && h->def_regular
15268 && (h->root.type == bfd_link_hash_defined
15269 || h->root.type == bfd_link_hash_defweak));
15270 rela.r_offset = (htab->elf.iplt->output_section->vma
15271 + htab->elf.iplt->output_offset
15272 + ent->plt.offset);
15273 if (htab->opd_abi)
15274 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15275 else
15276 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15277 rela.r_addend = (h->root.u.def.value
15278 + h->root.u.def.section->output_offset
15279 + h->root.u.def.section->output_section->vma
15280 + ent->addend);
15281 loc = (htab->elf.irelplt->contents
15282 + (htab->elf.irelplt->reloc_count++
15283 * sizeof (Elf64_External_Rela)));
15284 }
15285 else
15286 {
15287 rela.r_offset = (htab->elf.splt->output_section->vma
15288 + htab->elf.splt->output_offset
15289 + ent->plt.offset);
15290 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15291 rela.r_addend = ent->addend;
15292 loc = (htab->elf.srelplt->contents
15293 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15294 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15295 }
15296 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15297
15298 if (!htab->opd_abi)
15299 {
15300 if (!h->def_regular)
15301 {
15302 /* Mark the symbol as undefined, rather than as
15303 defined in glink. Leave the value if there were
15304 any relocations where pointer equality matters
15305 (this is a clue for the dynamic linker, to make
15306 function pointer comparisons work between an
15307 application and shared library), otherwise set it
15308 to zero. */
15309 sym->st_shndx = SHN_UNDEF;
15310 if (!h->pointer_equality_needed)
15311 sym->st_value = 0;
15312 else if (!h->ref_regular_nonweak)
15313 {
15314 /* This breaks function pointer comparisons, but
15315 that is better than breaking tests for a NULL
15316 function pointer. */
15317 sym->st_value = 0;
15318 }
15319 }
15320 }
15321 }
15322
15323 if (h->needs_copy)
15324 {
15325 /* This symbol needs a copy reloc. Set it up. */
15326
15327 if (h->dynindx == -1
15328 || (h->root.type != bfd_link_hash_defined
15329 && h->root.type != bfd_link_hash_defweak)
15330 || htab->relbss == NULL)
15331 abort ();
15332
15333 rela.r_offset = (h->root.u.def.value
15334 + h->root.u.def.section->output_section->vma
15335 + h->root.u.def.section->output_offset);
15336 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15337 rela.r_addend = 0;
15338 loc = htab->relbss->contents;
15339 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15340 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15341 }
15342
15343 return TRUE;
15344 }
15345
15346 /* Used to decide how to sort relocs in an optimal manner for the
15347 dynamic linker, before writing them out. */
15348
15349 static enum elf_reloc_type_class
15350 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15351 const asection *rel_sec,
15352 const Elf_Internal_Rela *rela)
15353 {
15354 enum elf_ppc64_reloc_type r_type;
15355 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15356
15357 if (rel_sec == htab->elf.irelplt)
15358 return reloc_class_ifunc;
15359
15360 r_type = ELF64_R_TYPE (rela->r_info);
15361 switch (r_type)
15362 {
15363 case R_PPC64_RELATIVE:
15364 return reloc_class_relative;
15365 case R_PPC64_JMP_SLOT:
15366 return reloc_class_plt;
15367 case R_PPC64_COPY:
15368 return reloc_class_copy;
15369 default:
15370 return reloc_class_normal;
15371 }
15372 }
15373
15374 /* Finish up the dynamic sections. */
15375
15376 static bfd_boolean
15377 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15378 struct bfd_link_info *info)
15379 {
15380 struct ppc_link_hash_table *htab;
15381 bfd *dynobj;
15382 asection *sdyn;
15383
15384 htab = ppc_hash_table (info);
15385 if (htab == NULL)
15386 return FALSE;
15387
15388 dynobj = htab->elf.dynobj;
15389 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15390
15391 if (htab->elf.dynamic_sections_created)
15392 {
15393 Elf64_External_Dyn *dyncon, *dynconend;
15394
15395 if (sdyn == NULL || htab->elf.sgot == NULL)
15396 abort ();
15397
15398 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15399 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15400 for (; dyncon < dynconend; dyncon++)
15401 {
15402 Elf_Internal_Dyn dyn;
15403 asection *s;
15404
15405 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15406
15407 switch (dyn.d_tag)
15408 {
15409 default:
15410 continue;
15411
15412 case DT_PPC64_GLINK:
15413 s = htab->glink;
15414 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15415 /* We stupidly defined DT_PPC64_GLINK to be the start
15416 of glink rather than the first entry point, which is
15417 what ld.so needs, and now have a bigger stub to
15418 support automatic multiple TOCs. */
15419 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15420 break;
15421
15422 case DT_PPC64_OPD:
15423 s = bfd_get_section_by_name (output_bfd, ".opd");
15424 if (s == NULL)
15425 continue;
15426 dyn.d_un.d_ptr = s->vma;
15427 break;
15428
15429 case DT_PPC64_OPT:
15430 if (htab->do_multi_toc && htab->multi_toc_needed)
15431 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15432 break;
15433
15434 case DT_PPC64_OPDSZ:
15435 s = bfd_get_section_by_name (output_bfd, ".opd");
15436 if (s == NULL)
15437 continue;
15438 dyn.d_un.d_val = s->size;
15439 break;
15440
15441 case DT_PLTGOT:
15442 s = htab->elf.splt;
15443 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15444 break;
15445
15446 case DT_JMPREL:
15447 s = htab->elf.srelplt;
15448 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15449 break;
15450
15451 case DT_PLTRELSZ:
15452 dyn.d_un.d_val = htab->elf.srelplt->size;
15453 break;
15454
15455 case DT_RELASZ:
15456 /* Don't count procedure linkage table relocs in the
15457 overall reloc count. */
15458 s = htab->elf.srelplt;
15459 if (s == NULL)
15460 continue;
15461 dyn.d_un.d_val -= s->size;
15462 break;
15463
15464 case DT_RELA:
15465 /* We may not be using the standard ELF linker script.
15466 If .rela.plt is the first .rela section, we adjust
15467 DT_RELA to not include it. */
15468 s = htab->elf.srelplt;
15469 if (s == NULL)
15470 continue;
15471 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15472 continue;
15473 dyn.d_un.d_ptr += s->size;
15474 break;
15475 }
15476
15477 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15478 }
15479 }
15480
15481 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15482 {
15483 /* Fill in the first entry in the global offset table.
15484 We use it to hold the link-time TOCbase. */
15485 bfd_put_64 (output_bfd,
15486 elf_gp (output_bfd) + TOC_BASE_OFF,
15487 htab->elf.sgot->contents);
15488
15489 /* Set .got entry size. */
15490 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15491 }
15492
15493 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15494 {
15495 /* Set .plt entry size. */
15496 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15497 = PLT_ENTRY_SIZE (htab);
15498 }
15499
15500 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15501 brlt ourselves if emitrelocations. */
15502 if (htab->brlt != NULL
15503 && htab->brlt->reloc_count != 0
15504 && !_bfd_elf_link_output_relocs (output_bfd,
15505 htab->brlt,
15506 elf_section_data (htab->brlt)->rela.hdr,
15507 elf_section_data (htab->brlt)->relocs,
15508 NULL))
15509 return FALSE;
15510
15511 if (htab->glink != NULL
15512 && htab->glink->reloc_count != 0
15513 && !_bfd_elf_link_output_relocs (output_bfd,
15514 htab->glink,
15515 elf_section_data (htab->glink)->rela.hdr,
15516 elf_section_data (htab->glink)->relocs,
15517 NULL))
15518 return FALSE;
15519
15520 if (htab->glink_eh_frame != NULL
15521 && htab->glink_eh_frame->size != 0)
15522 {
15523 bfd_vma val;
15524 bfd_byte *p;
15525 asection *stub_sec;
15526
15527 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15528 for (stub_sec = htab->params->stub_bfd->sections;
15529 stub_sec != NULL;
15530 stub_sec = stub_sec->next)
15531 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15532 {
15533 /* FDE length. */
15534 p += 4;
15535 /* CIE pointer. */
15536 p += 4;
15537 /* Offset to stub section. */
15538 val = (stub_sec->output_section->vma
15539 + stub_sec->output_offset);
15540 val -= (htab->glink_eh_frame->output_section->vma
15541 + htab->glink_eh_frame->output_offset
15542 + (p - htab->glink_eh_frame->contents));
15543 if (val + 0x80000000 > 0xffffffff)
15544 {
15545 info->callbacks->einfo
15546 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15547 stub_sec->name);
15548 return FALSE;
15549 }
15550 bfd_put_32 (dynobj, val, p);
15551 p += 4;
15552 /* stub section size. */
15553 p += 4;
15554 /* Augmentation. */
15555 p += 1;
15556 /* Pad. */
15557 p += 7;
15558 }
15559 if (htab->glink != NULL && htab->glink->size != 0)
15560 {
15561 /* FDE length. */
15562 p += 4;
15563 /* CIE pointer. */
15564 p += 4;
15565 /* Offset to .glink. */
15566 val = (htab->glink->output_section->vma
15567 + htab->glink->output_offset
15568 + 8);
15569 val -= (htab->glink_eh_frame->output_section->vma
15570 + htab->glink_eh_frame->output_offset
15571 + (p - htab->glink_eh_frame->contents));
15572 if (val + 0x80000000 > 0xffffffff)
15573 {
15574 info->callbacks->einfo
15575 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15576 htab->glink->name);
15577 return FALSE;
15578 }
15579 bfd_put_32 (dynobj, val, p);
15580 p += 4;
15581 /* .glink size. */
15582 p += 4;
15583 /* Augmentation. */
15584 p += 1;
15585 /* Ops. */
15586 p += 7;
15587 }
15588
15589 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15590 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15591 htab->glink_eh_frame,
15592 htab->glink_eh_frame->contents))
15593 return FALSE;
15594 }
15595
15596 /* We need to handle writing out multiple GOT sections ourselves,
15597 since we didn't add them to DYNOBJ. We know dynobj is the first
15598 bfd. */
15599 while ((dynobj = dynobj->link.next) != NULL)
15600 {
15601 asection *s;
15602
15603 if (!is_ppc64_elf (dynobj))
15604 continue;
15605
15606 s = ppc64_elf_tdata (dynobj)->got;
15607 if (s != NULL
15608 && s->size != 0
15609 && s->output_section != bfd_abs_section_ptr
15610 && !bfd_set_section_contents (output_bfd, s->output_section,
15611 s->contents, s->output_offset,
15612 s->size))
15613 return FALSE;
15614 s = ppc64_elf_tdata (dynobj)->relgot;
15615 if (s != NULL
15616 && s->size != 0
15617 && s->output_section != bfd_abs_section_ptr
15618 && !bfd_set_section_contents (output_bfd, s->output_section,
15619 s->contents, s->output_offset,
15620 s->size))
15621 return FALSE;
15622 }
15623
15624 return TRUE;
15625 }
15626
15627 #include "elf64-target.h"
15628
15629 /* FreeBSD support */
15630
15631 #undef TARGET_LITTLE_SYM
15632 #undef TARGET_LITTLE_NAME
15633
15634 #undef TARGET_BIG_SYM
15635 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15636 #undef TARGET_BIG_NAME
15637 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15638
15639 #undef ELF_OSABI
15640 #define ELF_OSABI ELFOSABI_FREEBSD
15641
15642 #undef elf64_bed
15643 #define elf64_bed elf64_powerpc_fbsd_bed
15644
15645 #include "elf64-target.h"
15646