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PowerPC indirect calls to __tls_get_addr
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2018 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_want_dynrelro 1
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
105 #define elf_backend_gc_keep ppc64_elf_gc_keep
106 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
107 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* __glink_PLTresolve stub instructions. We enter with the index in R0. */
191 #define GLINK_PLTRESOLVE_SIZE(htab) \
192 (8u + (htab->opd_abi ? 11 * 4 : 14 * 4))
193 /* 0: */
194 /* .quad plt0-1f */
195 /* __glink: */
196 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
197 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
198 /* 1: */
199 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
200 /* ld %2,(0b-1b)(%11) */
201 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
202 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
203 /* ld %12,0(%11) */
204 /* ld %2,8(%11) */
205 /* mtctr %12 */
206 /* ld %11,16(%11) */
207 /* bctr */
208 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
209 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
210 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
211 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
212 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
213
214 /* Pad with this. */
215 #define NOP 0x60000000
216
217 /* Some other nops. */
218 #define CROR_151515 0x4def7b82
219 #define CROR_313131 0x4ffffb82
220
221 /* .glink entries for the first 32k functions are two instructions. */
222 #define LI_R0_0 0x38000000 /* li %r0,0 */
223 #define B_DOT 0x48000000 /* b . */
224
225 /* After that, we need two instructions to load the index, followed by
226 a branch. */
227 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
228 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
229
230 /* Instructions used by the save and restore reg functions. */
231 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
232 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
233 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
234 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
235 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
236 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
237 #define LI_R12_0 0x39800000 /* li %r12,0 */
238 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
239 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
240 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
241 #define BLR 0x4e800020 /* blr */
242
243 /* Since .opd is an array of descriptors and each entry will end up
244 with identical R_PPC64_RELATIVE relocs, there is really no need to
245 propagate .opd relocs; The dynamic linker should be taught to
246 relocate .opd without reloc entries. */
247 #ifndef NO_OPD_RELOCS
248 #define NO_OPD_RELOCS 0
249 #endif
250
251 #ifndef ARRAY_SIZE
252 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
253 #endif
254
255 static inline int
256 abiversion (bfd *abfd)
257 {
258 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
259 }
260
261 static inline void
262 set_abiversion (bfd *abfd, int ver)
263 {
264 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
265 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
266 }
267 \f
268 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
269
270 /* Relocation HOWTO's. */
271 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
272
273 static reloc_howto_type ppc64_elf_howto_raw[] =
274 {
275 /* This reloc does nothing. */
276 HOWTO (R_PPC64_NONE, /* type */
277 0, /* rightshift */
278 3, /* size (0 = byte, 1 = short, 2 = long) */
279 0, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_dont, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_PPC64_NONE", /* name */
285 FALSE, /* partial_inplace */
286 0, /* src_mask */
287 0, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* A standard 32 bit relocation. */
291 HOWTO (R_PPC64_ADDR32, /* type */
292 0, /* rightshift */
293 2, /* size (0 = byte, 1 = short, 2 = long) */
294 32, /* bitsize */
295 FALSE, /* pc_relative */
296 0, /* bitpos */
297 complain_overflow_bitfield, /* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_PPC64_ADDR32", /* name */
300 FALSE, /* partial_inplace */
301 0, /* src_mask */
302 0xffffffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
304
305 /* An absolute 26 bit branch; the lower two bits must be zero.
306 FIXME: we don't check that, we just clear them. */
307 HOWTO (R_PPC64_ADDR24, /* type */
308 0, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 26, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_bitfield, /* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_PPC64_ADDR24", /* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0x03fffffc, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 /* A standard 16 bit relocation. */
322 HOWTO (R_PPC64_ADDR16, /* type */
323 0, /* rightshift */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC64_ADDR16", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* A 16 bit relocation without overflow. */
337 HOWTO (R_PPC64_ADDR16_LO, /* type */
338 0, /* rightshift */
339 1, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_dont,/* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_PPC64_ADDR16_LO", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0xffff, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 /* Bits 16-31 of an address. */
352 HOWTO (R_PPC64_ADDR16_HI, /* type */
353 16, /* rightshift */
354 1, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 FALSE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC64_ADDR16_HI", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xffff, /* dst_mask */
364 FALSE), /* pcrel_offset */
365
366 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
367 bits, treated as a signed number, is negative. */
368 HOWTO (R_PPC64_ADDR16_HA, /* type */
369 16, /* rightshift */
370 1, /* size (0 = byte, 1 = short, 2 = long) */
371 16, /* bitsize */
372 FALSE, /* pc_relative */
373 0, /* bitpos */
374 complain_overflow_signed, /* complain_on_overflow */
375 ppc64_elf_ha_reloc, /* special_function */
376 "R_PPC64_ADDR16_HA", /* name */
377 FALSE, /* partial_inplace */
378 0, /* src_mask */
379 0xffff, /* dst_mask */
380 FALSE), /* pcrel_offset */
381
382 /* An absolute 16 bit branch; the lower two bits must be zero.
383 FIXME: we don't check that, we just clear them. */
384 HOWTO (R_PPC64_ADDR14, /* type */
385 0, /* rightshift */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
387 16, /* bitsize */
388 FALSE, /* pc_relative */
389 0, /* bitpos */
390 complain_overflow_signed, /* complain_on_overflow */
391 ppc64_elf_branch_reloc, /* special_function */
392 "R_PPC64_ADDR14", /* name */
393 FALSE, /* partial_inplace */
394 0, /* src_mask */
395 0x0000fffc, /* dst_mask */
396 FALSE), /* pcrel_offset */
397
398 /* An absolute 16 bit branch, for which bit 10 should be set to
399 indicate that the branch is expected to be taken. The lower two
400 bits must be zero. */
401 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_signed, /* complain_on_overflow */
408 ppc64_elf_brtaken_reloc, /* special_function */
409 "R_PPC64_ADDR14_BRTAKEN",/* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0x0000fffc, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* An absolute 16 bit branch, for which bit 10 should be set to
416 indicate that the branch is not expected to be taken. The lower
417 two bits must be zero. */
418 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
419 0, /* rightshift */
420 2, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* bitsize */
422 FALSE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_signed, /* complain_on_overflow */
425 ppc64_elf_brtaken_reloc, /* special_function */
426 "R_PPC64_ADDR14_BRNTAKEN",/* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0x0000fffc, /* dst_mask */
430 FALSE), /* pcrel_offset */
431
432 /* A relative 26 bit branch; the lower two bits must be zero. */
433 HOWTO (R_PPC64_REL24, /* type */
434 0, /* rightshift */
435 2, /* size (0 = byte, 1 = short, 2 = long) */
436 26, /* bitsize */
437 TRUE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_signed, /* complain_on_overflow */
440 ppc64_elf_branch_reloc, /* special_function */
441 "R_PPC64_REL24", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0x03fffffc, /* dst_mask */
445 TRUE), /* pcrel_offset */
446
447 /* A relative 16 bit branch; the lower two bits must be zero. */
448 HOWTO (R_PPC64_REL14, /* type */
449 0, /* rightshift */
450 2, /* size (0 = byte, 1 = short, 2 = long) */
451 16, /* bitsize */
452 TRUE, /* pc_relative */
453 0, /* bitpos */
454 complain_overflow_signed, /* complain_on_overflow */
455 ppc64_elf_branch_reloc, /* special_function */
456 "R_PPC64_REL14", /* name */
457 FALSE, /* partial_inplace */
458 0, /* src_mask */
459 0x0000fffc, /* dst_mask */
460 TRUE), /* pcrel_offset */
461
462 /* A relative 16 bit branch. Bit 10 should be set to indicate that
463 the branch is expected to be taken. The lower two bits must be
464 zero. */
465 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
466 0, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 16, /* bitsize */
469 TRUE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_signed, /* complain_on_overflow */
472 ppc64_elf_brtaken_reloc, /* special_function */
473 "R_PPC64_REL14_BRTAKEN", /* name */
474 FALSE, /* partial_inplace */
475 0, /* src_mask */
476 0x0000fffc, /* dst_mask */
477 TRUE), /* pcrel_offset */
478
479 /* A relative 16 bit branch. Bit 10 should be set to indicate that
480 the branch is not expected to be taken. The lower two bits must
481 be zero. */
482 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 TRUE, /* pc_relative */
487 0, /* bitpos */
488 complain_overflow_signed, /* complain_on_overflow */
489 ppc64_elf_brtaken_reloc, /* special_function */
490 "R_PPC64_REL14_BRNTAKEN",/* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0000fffc, /* dst_mask */
494 TRUE), /* pcrel_offset */
495
496 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
497 symbol. */
498 HOWTO (R_PPC64_GOT16, /* type */
499 0, /* rightshift */
500 1, /* size (0 = byte, 1 = short, 2 = long) */
501 16, /* bitsize */
502 FALSE, /* pc_relative */
503 0, /* bitpos */
504 complain_overflow_signed, /* complain_on_overflow */
505 ppc64_elf_unhandled_reloc, /* special_function */
506 "R_PPC64_GOT16", /* name */
507 FALSE, /* partial_inplace */
508 0, /* src_mask */
509 0xffff, /* dst_mask */
510 FALSE), /* pcrel_offset */
511
512 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
513 the symbol. */
514 HOWTO (R_PPC64_GOT16_LO, /* type */
515 0, /* rightshift */
516 1, /* size (0 = byte, 1 = short, 2 = long) */
517 16, /* bitsize */
518 FALSE, /* pc_relative */
519 0, /* bitpos */
520 complain_overflow_dont, /* complain_on_overflow */
521 ppc64_elf_unhandled_reloc, /* special_function */
522 "R_PPC64_GOT16_LO", /* name */
523 FALSE, /* partial_inplace */
524 0, /* src_mask */
525 0xffff, /* dst_mask */
526 FALSE), /* pcrel_offset */
527
528 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
529 the symbol. */
530 HOWTO (R_PPC64_GOT16_HI, /* type */
531 16, /* rightshift */
532 1, /* size (0 = byte, 1 = short, 2 = long) */
533 16, /* bitsize */
534 FALSE, /* pc_relative */
535 0, /* bitpos */
536 complain_overflow_signed,/* complain_on_overflow */
537 ppc64_elf_unhandled_reloc, /* special_function */
538 "R_PPC64_GOT16_HI", /* name */
539 FALSE, /* partial_inplace */
540 0, /* src_mask */
541 0xffff, /* dst_mask */
542 FALSE), /* pcrel_offset */
543
544 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
545 the symbol. */
546 HOWTO (R_PPC64_GOT16_HA, /* type */
547 16, /* rightshift */
548 1, /* size (0 = byte, 1 = short, 2 = long) */
549 16, /* bitsize */
550 FALSE, /* pc_relative */
551 0, /* bitpos */
552 complain_overflow_signed,/* complain_on_overflow */
553 ppc64_elf_unhandled_reloc, /* special_function */
554 "R_PPC64_GOT16_HA", /* name */
555 FALSE, /* partial_inplace */
556 0, /* src_mask */
557 0xffff, /* dst_mask */
558 FALSE), /* pcrel_offset */
559
560 /* This is used only by the dynamic linker. The symbol should exist
561 both in the object being run and in some shared library. The
562 dynamic linker copies the data addressed by the symbol from the
563 shared library into the object, because the object being
564 run has to have the data at some particular address. */
565 HOWTO (R_PPC64_COPY, /* type */
566 0, /* rightshift */
567 0, /* this one is variable size */
568 0, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_dont, /* complain_on_overflow */
572 ppc64_elf_unhandled_reloc, /* special_function */
573 "R_PPC64_COPY", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* Like R_PPC64_ADDR64, but used when setting global offset table
580 entries. */
581 HOWTO (R_PPC64_GLOB_DAT, /* type */
582 0, /* rightshift */
583 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
584 64, /* bitsize */
585 FALSE, /* pc_relative */
586 0, /* bitpos */
587 complain_overflow_dont, /* complain_on_overflow */
588 ppc64_elf_unhandled_reloc, /* special_function */
589 "R_PPC64_GLOB_DAT", /* name */
590 FALSE, /* partial_inplace */
591 0, /* src_mask */
592 ONES (64), /* dst_mask */
593 FALSE), /* pcrel_offset */
594
595 /* Created by the link editor. Marks a procedure linkage table
596 entry for a symbol. */
597 HOWTO (R_PPC64_JMP_SLOT, /* type */
598 0, /* rightshift */
599 0, /* size (0 = byte, 1 = short, 2 = long) */
600 0, /* bitsize */
601 FALSE, /* pc_relative */
602 0, /* bitpos */
603 complain_overflow_dont, /* complain_on_overflow */
604 ppc64_elf_unhandled_reloc, /* special_function */
605 "R_PPC64_JMP_SLOT", /* name */
606 FALSE, /* partial_inplace */
607 0, /* src_mask */
608 0, /* dst_mask */
609 FALSE), /* pcrel_offset */
610
611 /* Used only by the dynamic linker. When the object is run, this
612 doubleword64 is set to the load address of the object, plus the
613 addend. */
614 HOWTO (R_PPC64_RELATIVE, /* type */
615 0, /* rightshift */
616 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
617 64, /* bitsize */
618 FALSE, /* pc_relative */
619 0, /* bitpos */
620 complain_overflow_dont, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 "R_PPC64_RELATIVE", /* name */
623 FALSE, /* partial_inplace */
624 0, /* src_mask */
625 ONES (64), /* dst_mask */
626 FALSE), /* pcrel_offset */
627
628 /* Like R_PPC64_ADDR32, but may be unaligned. */
629 HOWTO (R_PPC64_UADDR32, /* type */
630 0, /* rightshift */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
632 32, /* bitsize */
633 FALSE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_bitfield, /* complain_on_overflow */
636 bfd_elf_generic_reloc, /* special_function */
637 "R_PPC64_UADDR32", /* name */
638 FALSE, /* partial_inplace */
639 0, /* src_mask */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
642
643 /* Like R_PPC64_ADDR16, but may be unaligned. */
644 HOWTO (R_PPC64_UADDR16, /* type */
645 0, /* rightshift */
646 1, /* size (0 = byte, 1 = short, 2 = long) */
647 16, /* bitsize */
648 FALSE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_bitfield, /* complain_on_overflow */
651 bfd_elf_generic_reloc, /* special_function */
652 "R_PPC64_UADDR16", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffff, /* dst_mask */
656 FALSE), /* pcrel_offset */
657
658 /* 32-bit PC relative. */
659 HOWTO (R_PPC64_REL32, /* type */
660 0, /* rightshift */
661 2, /* size (0 = byte, 1 = short, 2 = long) */
662 32, /* bitsize */
663 TRUE, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_signed, /* complain_on_overflow */
666 bfd_elf_generic_reloc, /* special_function */
667 "R_PPC64_REL32", /* name */
668 FALSE, /* partial_inplace */
669 0, /* src_mask */
670 0xffffffff, /* dst_mask */
671 TRUE), /* pcrel_offset */
672
673 /* 32-bit relocation to the symbol's procedure linkage table. */
674 HOWTO (R_PPC64_PLT32, /* type */
675 0, /* rightshift */
676 2, /* size (0 = byte, 1 = short, 2 = long) */
677 32, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_bitfield, /* complain_on_overflow */
681 ppc64_elf_unhandled_reloc, /* special_function */
682 "R_PPC64_PLT32", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffffffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
689 FIXME: R_PPC64_PLTREL32 not supported. */
690 HOWTO (R_PPC64_PLTREL32, /* type */
691 0, /* rightshift */
692 2, /* size (0 = byte, 1 = short, 2 = long) */
693 32, /* bitsize */
694 TRUE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_signed, /* complain_on_overflow */
697 ppc64_elf_unhandled_reloc, /* special_function */
698 "R_PPC64_PLTREL32", /* name */
699 FALSE, /* partial_inplace */
700 0, /* src_mask */
701 0xffffffff, /* dst_mask */
702 TRUE), /* pcrel_offset */
703
704 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
705 the symbol. */
706 HOWTO (R_PPC64_PLT16_LO, /* type */
707 0, /* rightshift */
708 1, /* size (0 = byte, 1 = short, 2 = long) */
709 16, /* bitsize */
710 FALSE, /* pc_relative */
711 0, /* bitpos */
712 complain_overflow_dont, /* complain_on_overflow */
713 ppc64_elf_unhandled_reloc, /* special_function */
714 "R_PPC64_PLT16_LO", /* name */
715 FALSE, /* partial_inplace */
716 0, /* src_mask */
717 0xffff, /* dst_mask */
718 FALSE), /* pcrel_offset */
719
720 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
721 the symbol. */
722 HOWTO (R_PPC64_PLT16_HI, /* type */
723 16, /* rightshift */
724 1, /* size (0 = byte, 1 = short, 2 = long) */
725 16, /* bitsize */
726 FALSE, /* pc_relative */
727 0, /* bitpos */
728 complain_overflow_signed, /* complain_on_overflow */
729 ppc64_elf_unhandled_reloc, /* special_function */
730 "R_PPC64_PLT16_HI", /* name */
731 FALSE, /* partial_inplace */
732 0, /* src_mask */
733 0xffff, /* dst_mask */
734 FALSE), /* pcrel_offset */
735
736 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
737 the symbol. */
738 HOWTO (R_PPC64_PLT16_HA, /* type */
739 16, /* rightshift */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
741 16, /* bitsize */
742 FALSE, /* pc_relative */
743 0, /* bitpos */
744 complain_overflow_signed, /* complain_on_overflow */
745 ppc64_elf_unhandled_reloc, /* special_function */
746 "R_PPC64_PLT16_HA", /* name */
747 FALSE, /* partial_inplace */
748 0, /* src_mask */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
751
752 /* 16-bit section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF, /* type */
754 0, /* rightshift */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
756 16, /* bitsize */
757 FALSE, /* pc_relative */
758 0, /* bitpos */
759 complain_overflow_signed, /* complain_on_overflow */
760 ppc64_elf_sectoff_reloc, /* special_function */
761 "R_PPC64_SECTOFF", /* name */
762 FALSE, /* partial_inplace */
763 0, /* src_mask */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
766
767 /* Like R_PPC64_SECTOFF, but no overflow warning. */
768 HOWTO (R_PPC64_SECTOFF_LO, /* type */
769 0, /* rightshift */
770 1, /* size (0 = byte, 1 = short, 2 = long) */
771 16, /* bitsize */
772 FALSE, /* pc_relative */
773 0, /* bitpos */
774 complain_overflow_dont, /* complain_on_overflow */
775 ppc64_elf_sectoff_reloc, /* special_function */
776 "R_PPC64_SECTOFF_LO", /* name */
777 FALSE, /* partial_inplace */
778 0, /* src_mask */
779 0xffff, /* dst_mask */
780 FALSE), /* pcrel_offset */
781
782 /* 16-bit upper half section relative relocation. */
783 HOWTO (R_PPC64_SECTOFF_HI, /* type */
784 16, /* rightshift */
785 1, /* size (0 = byte, 1 = short, 2 = long) */
786 16, /* bitsize */
787 FALSE, /* pc_relative */
788 0, /* bitpos */
789 complain_overflow_signed, /* complain_on_overflow */
790 ppc64_elf_sectoff_reloc, /* special_function */
791 "R_PPC64_SECTOFF_HI", /* name */
792 FALSE, /* partial_inplace */
793 0, /* src_mask */
794 0xffff, /* dst_mask */
795 FALSE), /* pcrel_offset */
796
797 /* 16-bit upper half adjusted section relative relocation. */
798 HOWTO (R_PPC64_SECTOFF_HA, /* type */
799 16, /* rightshift */
800 1, /* size (0 = byte, 1 = short, 2 = long) */
801 16, /* bitsize */
802 FALSE, /* pc_relative */
803 0, /* bitpos */
804 complain_overflow_signed, /* complain_on_overflow */
805 ppc64_elf_sectoff_ha_reloc, /* special_function */
806 "R_PPC64_SECTOFF_HA", /* name */
807 FALSE, /* partial_inplace */
808 0, /* src_mask */
809 0xffff, /* dst_mask */
810 FALSE), /* pcrel_offset */
811
812 /* Like R_PPC64_REL24 without touching the two least significant bits. */
813 HOWTO (R_PPC64_REL30, /* type */
814 2, /* rightshift */
815 2, /* size (0 = byte, 1 = short, 2 = long) */
816 30, /* bitsize */
817 TRUE, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 bfd_elf_generic_reloc, /* special_function */
821 "R_PPC64_REL30", /* name */
822 FALSE, /* partial_inplace */
823 0, /* src_mask */
824 0xfffffffc, /* dst_mask */
825 TRUE), /* pcrel_offset */
826
827 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
828
829 /* A standard 64-bit relocation. */
830 HOWTO (R_PPC64_ADDR64, /* type */
831 0, /* rightshift */
832 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
833 64, /* bitsize */
834 FALSE, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_dont, /* complain_on_overflow */
837 bfd_elf_generic_reloc, /* special_function */
838 "R_PPC64_ADDR64", /* name */
839 FALSE, /* partial_inplace */
840 0, /* src_mask */
841 ONES (64), /* dst_mask */
842 FALSE), /* pcrel_offset */
843
844 /* The bits 32-47 of an address. */
845 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
846 32, /* rightshift */
847 1, /* size (0 = byte, 1 = short, 2 = long) */
848 16, /* bitsize */
849 FALSE, /* pc_relative */
850 0, /* bitpos */
851 complain_overflow_dont, /* complain_on_overflow */
852 bfd_elf_generic_reloc, /* special_function */
853 "R_PPC64_ADDR16_HIGHER", /* name */
854 FALSE, /* partial_inplace */
855 0, /* src_mask */
856 0xffff, /* dst_mask */
857 FALSE), /* pcrel_offset */
858
859 /* The bits 32-47 of an address, plus 1 if the contents of the low
860 16 bits, treated as a signed number, is negative. */
861 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
862 32, /* rightshift */
863 1, /* size (0 = byte, 1 = short, 2 = long) */
864 16, /* bitsize */
865 FALSE, /* pc_relative */
866 0, /* bitpos */
867 complain_overflow_dont, /* complain_on_overflow */
868 ppc64_elf_ha_reloc, /* special_function */
869 "R_PPC64_ADDR16_HIGHERA", /* name */
870 FALSE, /* partial_inplace */
871 0, /* src_mask */
872 0xffff, /* dst_mask */
873 FALSE), /* pcrel_offset */
874
875 /* The bits 48-63 of an address. */
876 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
877 48, /* rightshift */
878 1, /* size (0 = byte, 1 = short, 2 = long) */
879 16, /* bitsize */
880 FALSE, /* pc_relative */
881 0, /* bitpos */
882 complain_overflow_dont, /* complain_on_overflow */
883 bfd_elf_generic_reloc, /* special_function */
884 "R_PPC64_ADDR16_HIGHEST", /* name */
885 FALSE, /* partial_inplace */
886 0, /* src_mask */
887 0xffff, /* dst_mask */
888 FALSE), /* pcrel_offset */
889
890 /* The bits 48-63 of an address, plus 1 if the contents of the low
891 16 bits, treated as a signed number, is negative. */
892 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
893 48, /* rightshift */
894 1, /* size (0 = byte, 1 = short, 2 = long) */
895 16, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 ppc64_elf_ha_reloc, /* special_function */
900 "R_PPC64_ADDR16_HIGHESTA", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 0xffff, /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 /* Like ADDR64, but may be unaligned. */
907 HOWTO (R_PPC64_UADDR64, /* type */
908 0, /* rightshift */
909 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
910 64, /* bitsize */
911 FALSE, /* pc_relative */
912 0, /* bitpos */
913 complain_overflow_dont, /* complain_on_overflow */
914 bfd_elf_generic_reloc, /* special_function */
915 "R_PPC64_UADDR64", /* name */
916 FALSE, /* partial_inplace */
917 0, /* src_mask */
918 ONES (64), /* dst_mask */
919 FALSE), /* pcrel_offset */
920
921 /* 64-bit relative relocation. */
922 HOWTO (R_PPC64_REL64, /* type */
923 0, /* rightshift */
924 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
925 64, /* bitsize */
926 TRUE, /* pc_relative */
927 0, /* bitpos */
928 complain_overflow_dont, /* complain_on_overflow */
929 bfd_elf_generic_reloc, /* special_function */
930 "R_PPC64_REL64", /* name */
931 FALSE, /* partial_inplace */
932 0, /* src_mask */
933 ONES (64), /* dst_mask */
934 TRUE), /* pcrel_offset */
935
936 /* 64-bit relocation to the symbol's procedure linkage table. */
937 HOWTO (R_PPC64_PLT64, /* type */
938 0, /* rightshift */
939 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
940 64, /* bitsize */
941 FALSE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_dont, /* complain_on_overflow */
944 ppc64_elf_unhandled_reloc, /* special_function */
945 "R_PPC64_PLT64", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 ONES (64), /* dst_mask */
949 FALSE), /* pcrel_offset */
950
951 /* 64-bit PC relative relocation to the symbol's procedure linkage
952 table. */
953 /* FIXME: R_PPC64_PLTREL64 not supported. */
954 HOWTO (R_PPC64_PLTREL64, /* type */
955 0, /* rightshift */
956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
957 64, /* bitsize */
958 TRUE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc64_elf_unhandled_reloc, /* special_function */
962 "R_PPC64_PLTREL64", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 ONES (64), /* dst_mask */
966 TRUE), /* pcrel_offset */
967
968 /* 16 bit TOC-relative relocation. */
969
970 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
971 HOWTO (R_PPC64_TOC16, /* type */
972 0, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_signed, /* complain_on_overflow */
978 ppc64_elf_toc_reloc, /* special_function */
979 "R_PPC64_TOC16", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* 16 bit TOC-relative relocation without overflow. */
986
987 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
988 HOWTO (R_PPC64_TOC16_LO, /* type */
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_dont, /* complain_on_overflow */
995 ppc64_elf_toc_reloc, /* special_function */
996 "R_PPC64_TOC16_LO", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* 16 bit TOC-relative relocation, high 16 bits. */
1003
1004 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1005 HOWTO (R_PPC64_TOC16_HI, /* type */
1006 16, /* rightshift */
1007 1, /* size (0 = byte, 1 = short, 2 = long) */
1008 16, /* bitsize */
1009 FALSE, /* pc_relative */
1010 0, /* bitpos */
1011 complain_overflow_signed, /* complain_on_overflow */
1012 ppc64_elf_toc_reloc, /* special_function */
1013 "R_PPC64_TOC16_HI", /* name */
1014 FALSE, /* partial_inplace */
1015 0, /* src_mask */
1016 0xffff, /* dst_mask */
1017 FALSE), /* pcrel_offset */
1018
1019 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1020 contents of the low 16 bits, treated as a signed number, is
1021 negative. */
1022
1023 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1024 HOWTO (R_PPC64_TOC16_HA, /* type */
1025 16, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_signed, /* complain_on_overflow */
1031 ppc64_elf_toc_ha_reloc, /* special_function */
1032 "R_PPC64_TOC16_HA", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1039
1040 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1041 HOWTO (R_PPC64_TOC, /* type */
1042 0, /* rightshift */
1043 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1044 64, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_dont, /* complain_on_overflow */
1048 ppc64_elf_toc64_reloc, /* special_function */
1049 "R_PPC64_TOC", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 ONES (64), /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 /* Like R_PPC64_GOT16, but also informs the link editor that the
1056 value to relocate may (!) refer to a PLT entry which the link
1057 editor (a) may replace with the symbol value. If the link editor
1058 is unable to fully resolve the symbol, it may (b) create a PLT
1059 entry and store the address to the new PLT entry in the GOT.
1060 This permits lazy resolution of function symbols at run time.
1061 The link editor may also skip all of this and just (c) emit a
1062 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1063 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1064 HOWTO (R_PPC64_PLTGOT16, /* type */
1065 0, /* rightshift */
1066 1, /* size (0 = byte, 1 = short, 2 = long) */
1067 16, /* bitsize */
1068 FALSE, /* pc_relative */
1069 0, /* bitpos */
1070 complain_overflow_signed, /* complain_on_overflow */
1071 ppc64_elf_unhandled_reloc, /* special_function */
1072 "R_PPC64_PLTGOT16", /* name */
1073 FALSE, /* partial_inplace */
1074 0, /* src_mask */
1075 0xffff, /* dst_mask */
1076 FALSE), /* pcrel_offset */
1077
1078 /* Like R_PPC64_PLTGOT16, but without overflow. */
1079 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1080 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1081 0, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc64_elf_unhandled_reloc, /* special_function */
1088 "R_PPC64_PLTGOT16_LO", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1095 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1096 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1097 16, /* rightshift */
1098 1, /* size (0 = byte, 1 = short, 2 = long) */
1099 16, /* bitsize */
1100 FALSE, /* pc_relative */
1101 0, /* bitpos */
1102 complain_overflow_signed, /* complain_on_overflow */
1103 ppc64_elf_unhandled_reloc, /* special_function */
1104 "R_PPC64_PLTGOT16_HI", /* name */
1105 FALSE, /* partial_inplace */
1106 0, /* src_mask */
1107 0xffff, /* dst_mask */
1108 FALSE), /* pcrel_offset */
1109
1110 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1111 1 if the contents of the low 16 bits, treated as a signed number,
1112 is negative. */
1113 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1114 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1115 16, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc64_elf_unhandled_reloc, /* special_function */
1122 "R_PPC64_PLTGOT16_HA", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_ADDR16_DS, /* type */
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_signed, /* complain_on_overflow */
1136 bfd_elf_generic_reloc, /* special_function */
1137 "R_PPC64_ADDR16_DS", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1145 0, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_dont,/* complain_on_overflow */
1151 bfd_elf_generic_reloc, /* special_function */
1152 "R_PPC64_ADDR16_LO_DS",/* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_GOT16_DS, /* type */
1160 0, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_signed, /* complain_on_overflow */
1166 ppc64_elf_unhandled_reloc, /* special_function */
1167 "R_PPC64_GOT16_DS", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1175 0, /* rightshift */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 16, /* bitsize */
1178 FALSE, /* pc_relative */
1179 0, /* bitpos */
1180 complain_overflow_dont, /* complain_on_overflow */
1181 ppc64_elf_unhandled_reloc, /* special_function */
1182 "R_PPC64_GOT16_LO_DS", /* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1190 0, /* rightshift */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1192 16, /* bitsize */
1193 FALSE, /* pc_relative */
1194 0, /* bitpos */
1195 complain_overflow_dont, /* complain_on_overflow */
1196 ppc64_elf_unhandled_reloc, /* special_function */
1197 "R_PPC64_PLT16_LO_DS", /* name */
1198 FALSE, /* partial_inplace */
1199 0, /* src_mask */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1202
1203 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1205 0, /* rightshift */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1207 16, /* bitsize */
1208 FALSE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_signed, /* complain_on_overflow */
1211 ppc64_elf_sectoff_reloc, /* special_function */
1212 "R_PPC64_SECTOFF_DS", /* name */
1213 FALSE, /* partial_inplace */
1214 0, /* src_mask */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1217
1218 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1219 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1220 0, /* rightshift */
1221 1, /* size (0 = byte, 1 = short, 2 = long) */
1222 16, /* bitsize */
1223 FALSE, /* pc_relative */
1224 0, /* bitpos */
1225 complain_overflow_dont, /* complain_on_overflow */
1226 ppc64_elf_sectoff_reloc, /* special_function */
1227 "R_PPC64_SECTOFF_LO_DS",/* name */
1228 FALSE, /* partial_inplace */
1229 0, /* src_mask */
1230 0xfffc, /* dst_mask */
1231 FALSE), /* pcrel_offset */
1232
1233 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1234 HOWTO (R_PPC64_TOC16_DS, /* type */
1235 0, /* rightshift */
1236 1, /* size (0 = byte, 1 = short, 2 = long) */
1237 16, /* bitsize */
1238 FALSE, /* pc_relative */
1239 0, /* bitpos */
1240 complain_overflow_signed, /* complain_on_overflow */
1241 ppc64_elf_toc_reloc, /* special_function */
1242 "R_PPC64_TOC16_DS", /* name */
1243 FALSE, /* partial_inplace */
1244 0, /* src_mask */
1245 0xfffc, /* dst_mask */
1246 FALSE), /* pcrel_offset */
1247
1248 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1249 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1250 0, /* rightshift */
1251 1, /* size (0 = byte, 1 = short, 2 = long) */
1252 16, /* bitsize */
1253 FALSE, /* pc_relative */
1254 0, /* bitpos */
1255 complain_overflow_dont, /* complain_on_overflow */
1256 ppc64_elf_toc_reloc, /* special_function */
1257 "R_PPC64_TOC16_LO_DS", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 0xfffc, /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1264 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1265 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_signed, /* complain_on_overflow */
1272 ppc64_elf_unhandled_reloc, /* special_function */
1273 "R_PPC64_PLTGOT16_DS", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xfffc, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1280 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1281 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1282 0, /* rightshift */
1283 1, /* size (0 = byte, 1 = short, 2 = long) */
1284 16, /* bitsize */
1285 FALSE, /* pc_relative */
1286 0, /* bitpos */
1287 complain_overflow_dont, /* complain_on_overflow */
1288 ppc64_elf_unhandled_reloc, /* special_function */
1289 "R_PPC64_PLTGOT16_LO_DS",/* name */
1290 FALSE, /* partial_inplace */
1291 0, /* src_mask */
1292 0xfffc, /* dst_mask */
1293 FALSE), /* pcrel_offset */
1294
1295 /* Marker relocs for TLS. */
1296 HOWTO (R_PPC64_TLS,
1297 0, /* rightshift */
1298 2, /* size (0 = byte, 1 = short, 2 = long) */
1299 32, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 bfd_elf_generic_reloc, /* special_function */
1304 "R_PPC64_TLS", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 HOWTO (R_PPC64_TLSGD,
1311 0, /* rightshift */
1312 2, /* size (0 = byte, 1 = short, 2 = long) */
1313 32, /* bitsize */
1314 FALSE, /* pc_relative */
1315 0, /* bitpos */
1316 complain_overflow_dont, /* complain_on_overflow */
1317 bfd_elf_generic_reloc, /* special_function */
1318 "R_PPC64_TLSGD", /* name */
1319 FALSE, /* partial_inplace */
1320 0, /* src_mask */
1321 0, /* dst_mask */
1322 FALSE), /* pcrel_offset */
1323
1324 HOWTO (R_PPC64_TLSLD,
1325 0, /* rightshift */
1326 2, /* size (0 = byte, 1 = short, 2 = long) */
1327 32, /* bitsize */
1328 FALSE, /* pc_relative */
1329 0, /* bitpos */
1330 complain_overflow_dont, /* complain_on_overflow */
1331 bfd_elf_generic_reloc, /* special_function */
1332 "R_PPC64_TLSLD", /* name */
1333 FALSE, /* partial_inplace */
1334 0, /* src_mask */
1335 0, /* dst_mask */
1336 FALSE), /* pcrel_offset */
1337
1338 HOWTO (R_PPC64_TOCSAVE,
1339 0, /* rightshift */
1340 2, /* size (0 = byte, 1 = short, 2 = long) */
1341 32, /* bitsize */
1342 FALSE, /* pc_relative */
1343 0, /* bitpos */
1344 complain_overflow_dont, /* complain_on_overflow */
1345 bfd_elf_generic_reloc, /* special_function */
1346 "R_PPC64_TOCSAVE", /* name */
1347 FALSE, /* partial_inplace */
1348 0, /* src_mask */
1349 0, /* dst_mask */
1350 FALSE), /* pcrel_offset */
1351
1352 /* Computes the load module index of the load module that contains the
1353 definition of its TLS sym. */
1354 HOWTO (R_PPC64_DTPMOD64,
1355 0, /* rightshift */
1356 4, /* size (0 = byte, 1 = short, 2 = long) */
1357 64, /* bitsize */
1358 FALSE, /* pc_relative */
1359 0, /* bitpos */
1360 complain_overflow_dont, /* complain_on_overflow */
1361 ppc64_elf_unhandled_reloc, /* special_function */
1362 "R_PPC64_DTPMOD64", /* name */
1363 FALSE, /* partial_inplace */
1364 0, /* src_mask */
1365 ONES (64), /* dst_mask */
1366 FALSE), /* pcrel_offset */
1367
1368 /* Computes a dtv-relative displacement, the difference between the value
1369 of sym+add and the base address of the thread-local storage block that
1370 contains the definition of sym, minus 0x8000. */
1371 HOWTO (R_PPC64_DTPREL64,
1372 0, /* rightshift */
1373 4, /* size (0 = byte, 1 = short, 2 = long) */
1374 64, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL64", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 ONES (64), /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* A 16 bit dtprel reloc. */
1386 HOWTO (R_PPC64_DTPREL16,
1387 0, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_signed, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16, but no overflow. */
1401 HOWTO (R_PPC64_DTPREL16_LO,
1402 0, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_LO", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HI,
1417 16, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_signed, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HI", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HA,
1432 16, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1434 16, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_signed, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HA", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHER,
1447 32, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHER", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1461 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1462 32, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 16, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_dont, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_HIGHERA", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0xffff, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1476 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1477 48, /* rightshift */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1479 16, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_HIGHEST", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0xffff, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1491 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1492 48, /* rightshift */
1493 1, /* size (0 = byte, 1 = short, 2 = long) */
1494 16, /* bitsize */
1495 FALSE, /* pc_relative */
1496 0, /* bitpos */
1497 complain_overflow_dont, /* complain_on_overflow */
1498 ppc64_elf_unhandled_reloc, /* special_function */
1499 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1500 FALSE, /* partial_inplace */
1501 0, /* src_mask */
1502 0xffff, /* dst_mask */
1503 FALSE), /* pcrel_offset */
1504
1505 /* Like DTPREL16, but for insns with a DS field. */
1506 HOWTO (R_PPC64_DTPREL16_DS,
1507 0, /* rightshift */
1508 1, /* size (0 = byte, 1 = short, 2 = long) */
1509 16, /* bitsize */
1510 FALSE, /* pc_relative */
1511 0, /* bitpos */
1512 complain_overflow_signed, /* complain_on_overflow */
1513 ppc64_elf_unhandled_reloc, /* special_function */
1514 "R_PPC64_DTPREL16_DS", /* name */
1515 FALSE, /* partial_inplace */
1516 0, /* src_mask */
1517 0xfffc, /* dst_mask */
1518 FALSE), /* pcrel_offset */
1519
1520 /* Like DTPREL16_DS, but no overflow. */
1521 HOWTO (R_PPC64_DTPREL16_LO_DS,
1522 0, /* rightshift */
1523 1, /* size (0 = byte, 1 = short, 2 = long) */
1524 16, /* bitsize */
1525 FALSE, /* pc_relative */
1526 0, /* bitpos */
1527 complain_overflow_dont, /* complain_on_overflow */
1528 ppc64_elf_unhandled_reloc, /* special_function */
1529 "R_PPC64_DTPREL16_LO_DS", /* name */
1530 FALSE, /* partial_inplace */
1531 0, /* src_mask */
1532 0xfffc, /* dst_mask */
1533 FALSE), /* pcrel_offset */
1534
1535 /* Computes a tp-relative displacement, the difference between the value of
1536 sym+add and the value of the thread pointer (r13). */
1537 HOWTO (R_PPC64_TPREL64,
1538 0, /* rightshift */
1539 4, /* size (0 = byte, 1 = short, 2 = long) */
1540 64, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL64", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 ONES (64), /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* A 16 bit tprel reloc. */
1552 HOWTO (R_PPC64_TPREL16,
1553 0, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_signed, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16, but no overflow. */
1567 HOWTO (R_PPC64_TPREL16_LO,
1568 0, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_dont, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_LO", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_LO, but next higher group of 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HI,
1583 16, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_signed, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HI", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Like TPREL16_HI, but adjust for low 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HA,
1598 16, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1600 16, /* bitsize */
1601 FALSE, /* pc_relative */
1602 0, /* bitpos */
1603 complain_overflow_signed, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HA", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like TPREL16_HI, but next higher group of 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHER,
1613 32, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1615 16, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHER", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1627 HOWTO (R_PPC64_TPREL16_HIGHERA,
1628 32, /* rightshift */
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1630 16, /* bitsize */
1631 FALSE, /* pc_relative */
1632 0, /* bitpos */
1633 complain_overflow_dont, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_HIGHERA", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xffff, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1642 HOWTO (R_PPC64_TPREL16_HIGHEST,
1643 48, /* rightshift */
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1645 16, /* bitsize */
1646 FALSE, /* pc_relative */
1647 0, /* bitpos */
1648 complain_overflow_dont, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_HIGHEST", /* name */
1651 FALSE, /* partial_inplace */
1652 0, /* src_mask */
1653 0xffff, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1655
1656 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1657 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1658 48, /* rightshift */
1659 1, /* size (0 = byte, 1 = short, 2 = long) */
1660 16, /* bitsize */
1661 FALSE, /* pc_relative */
1662 0, /* bitpos */
1663 complain_overflow_dont, /* complain_on_overflow */
1664 ppc64_elf_unhandled_reloc, /* special_function */
1665 "R_PPC64_TPREL16_HIGHESTA", /* name */
1666 FALSE, /* partial_inplace */
1667 0, /* src_mask */
1668 0xffff, /* dst_mask */
1669 FALSE), /* pcrel_offset */
1670
1671 /* Like TPREL16, but for insns with a DS field. */
1672 HOWTO (R_PPC64_TPREL16_DS,
1673 0, /* rightshift */
1674 1, /* size (0 = byte, 1 = short, 2 = long) */
1675 16, /* bitsize */
1676 FALSE, /* pc_relative */
1677 0, /* bitpos */
1678 complain_overflow_signed, /* complain_on_overflow */
1679 ppc64_elf_unhandled_reloc, /* special_function */
1680 "R_PPC64_TPREL16_DS", /* name */
1681 FALSE, /* partial_inplace */
1682 0, /* src_mask */
1683 0xfffc, /* dst_mask */
1684 FALSE), /* pcrel_offset */
1685
1686 /* Like TPREL16_DS, but no overflow. */
1687 HOWTO (R_PPC64_TPREL16_LO_DS,
1688 0, /* rightshift */
1689 1, /* size (0 = byte, 1 = short, 2 = long) */
1690 16, /* bitsize */
1691 FALSE, /* pc_relative */
1692 0, /* bitpos */
1693 complain_overflow_dont, /* complain_on_overflow */
1694 ppc64_elf_unhandled_reloc, /* special_function */
1695 "R_PPC64_TPREL16_LO_DS", /* name */
1696 FALSE, /* partial_inplace */
1697 0, /* src_mask */
1698 0xfffc, /* dst_mask */
1699 FALSE), /* pcrel_offset */
1700
1701 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1702 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1703 to the first entry relative to the TOC base (r2). */
1704 HOWTO (R_PPC64_GOT_TLSGD16,
1705 0, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 FALSE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_signed, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1717
1718 /* Like GOT_TLSGD16, but no overflow. */
1719 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1720 0, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 FALSE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_dont, /* complain_on_overflow */
1726 ppc64_elf_unhandled_reloc, /* special_function */
1727 "R_PPC64_GOT_TLSGD16_LO", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 FALSE), /* pcrel_offset */
1732
1733 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1734 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1735 16, /* rightshift */
1736 1, /* size (0 = byte, 1 = short, 2 = long) */
1737 16, /* bitsize */
1738 FALSE, /* pc_relative */
1739 0, /* bitpos */
1740 complain_overflow_signed, /* complain_on_overflow */
1741 ppc64_elf_unhandled_reloc, /* special_function */
1742 "R_PPC64_GOT_TLSGD16_HI", /* name */
1743 FALSE, /* partial_inplace */
1744 0, /* src_mask */
1745 0xffff, /* dst_mask */
1746 FALSE), /* pcrel_offset */
1747
1748 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1749 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1750 16, /* rightshift */
1751 1, /* size (0 = byte, 1 = short, 2 = long) */
1752 16, /* bitsize */
1753 FALSE, /* pc_relative */
1754 0, /* bitpos */
1755 complain_overflow_signed, /* complain_on_overflow */
1756 ppc64_elf_unhandled_reloc, /* special_function */
1757 "R_PPC64_GOT_TLSGD16_HA", /* name */
1758 FALSE, /* partial_inplace */
1759 0, /* src_mask */
1760 0xffff, /* dst_mask */
1761 FALSE), /* pcrel_offset */
1762
1763 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1764 with values (sym+add)@dtpmod and zero, and computes the offset to the
1765 first entry relative to the TOC base (r2). */
1766 HOWTO (R_PPC64_GOT_TLSLD16,
1767 0, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_signed, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779
1780 /* Like GOT_TLSLD16, but no overflow. */
1781 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1782 0, /* rightshift */
1783 1, /* size (0 = byte, 1 = short, 2 = long) */
1784 16, /* bitsize */
1785 FALSE, /* pc_relative */
1786 0, /* bitpos */
1787 complain_overflow_dont, /* complain_on_overflow */
1788 ppc64_elf_unhandled_reloc, /* special_function */
1789 "R_PPC64_GOT_TLSLD16_LO", /* name */
1790 FALSE, /* partial_inplace */
1791 0, /* src_mask */
1792 0xffff, /* dst_mask */
1793 FALSE), /* pcrel_offset */
1794
1795 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1796 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1797 16, /* rightshift */
1798 1, /* size (0 = byte, 1 = short, 2 = long) */
1799 16, /* bitsize */
1800 FALSE, /* pc_relative */
1801 0, /* bitpos */
1802 complain_overflow_signed, /* complain_on_overflow */
1803 ppc64_elf_unhandled_reloc, /* special_function */
1804 "R_PPC64_GOT_TLSLD16_HI", /* name */
1805 FALSE, /* partial_inplace */
1806 0, /* src_mask */
1807 0xffff, /* dst_mask */
1808 FALSE), /* pcrel_offset */
1809
1810 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1811 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1812 16, /* rightshift */
1813 1, /* size (0 = byte, 1 = short, 2 = long) */
1814 16, /* bitsize */
1815 FALSE, /* pc_relative */
1816 0, /* bitpos */
1817 complain_overflow_signed, /* complain_on_overflow */
1818 ppc64_elf_unhandled_reloc, /* special_function */
1819 "R_PPC64_GOT_TLSLD16_HA", /* name */
1820 FALSE, /* partial_inplace */
1821 0, /* src_mask */
1822 0xffff, /* dst_mask */
1823 FALSE), /* pcrel_offset */
1824
1825 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1826 the offset to the entry relative to the TOC base (r2). */
1827 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1828 0, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1830 16, /* bitsize */
1831 FALSE, /* pc_relative */
1832 0, /* bitpos */
1833 complain_overflow_signed, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_DS", /* name */
1836 FALSE, /* partial_inplace */
1837 0, /* src_mask */
1838 0xfffc, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1840
1841 /* Like GOT_DTPREL16_DS, but no overflow. */
1842 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1843 0, /* rightshift */
1844 1, /* size (0 = byte, 1 = short, 2 = long) */
1845 16, /* bitsize */
1846 FALSE, /* pc_relative */
1847 0, /* bitpos */
1848 complain_overflow_dont, /* complain_on_overflow */
1849 ppc64_elf_unhandled_reloc, /* special_function */
1850 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1851 FALSE, /* partial_inplace */
1852 0, /* src_mask */
1853 0xfffc, /* dst_mask */
1854 FALSE), /* pcrel_offset */
1855
1856 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1857 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1858 16, /* rightshift */
1859 1, /* size (0 = byte, 1 = short, 2 = long) */
1860 16, /* bitsize */
1861 FALSE, /* pc_relative */
1862 0, /* bitpos */
1863 complain_overflow_signed, /* complain_on_overflow */
1864 ppc64_elf_unhandled_reloc, /* special_function */
1865 "R_PPC64_GOT_DTPREL16_HI", /* name */
1866 FALSE, /* partial_inplace */
1867 0, /* src_mask */
1868 0xffff, /* dst_mask */
1869 FALSE), /* pcrel_offset */
1870
1871 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1872 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1873 16, /* rightshift */
1874 1, /* size (0 = byte, 1 = short, 2 = long) */
1875 16, /* bitsize */
1876 FALSE, /* pc_relative */
1877 0, /* bitpos */
1878 complain_overflow_signed, /* complain_on_overflow */
1879 ppc64_elf_unhandled_reloc, /* special_function */
1880 "R_PPC64_GOT_DTPREL16_HA", /* name */
1881 FALSE, /* partial_inplace */
1882 0, /* src_mask */
1883 0xffff, /* dst_mask */
1884 FALSE), /* pcrel_offset */
1885
1886 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1887 offset to the entry relative to the TOC base (r2). */
1888 HOWTO (R_PPC64_GOT_TPREL16_DS,
1889 0, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1891 16, /* bitsize */
1892 FALSE, /* pc_relative */
1893 0, /* bitpos */
1894 complain_overflow_signed, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_DS", /* name */
1897 FALSE, /* partial_inplace */
1898 0, /* src_mask */
1899 0xfffc, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1901
1902 /* Like GOT_TPREL16_DS, but no overflow. */
1903 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1904 0, /* rightshift */
1905 1, /* size (0 = byte, 1 = short, 2 = long) */
1906 16, /* bitsize */
1907 FALSE, /* pc_relative */
1908 0, /* bitpos */
1909 complain_overflow_dont, /* complain_on_overflow */
1910 ppc64_elf_unhandled_reloc, /* special_function */
1911 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1912 FALSE, /* partial_inplace */
1913 0, /* src_mask */
1914 0xfffc, /* dst_mask */
1915 FALSE), /* pcrel_offset */
1916
1917 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1918 HOWTO (R_PPC64_GOT_TPREL16_HI,
1919 16, /* rightshift */
1920 1, /* size (0 = byte, 1 = short, 2 = long) */
1921 16, /* bitsize */
1922 FALSE, /* pc_relative */
1923 0, /* bitpos */
1924 complain_overflow_signed, /* complain_on_overflow */
1925 ppc64_elf_unhandled_reloc, /* special_function */
1926 "R_PPC64_GOT_TPREL16_HI", /* name */
1927 FALSE, /* partial_inplace */
1928 0, /* src_mask */
1929 0xffff, /* dst_mask */
1930 FALSE), /* pcrel_offset */
1931
1932 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1933 HOWTO (R_PPC64_GOT_TPREL16_HA,
1934 16, /* rightshift */
1935 1, /* size (0 = byte, 1 = short, 2 = long) */
1936 16, /* bitsize */
1937 FALSE, /* pc_relative */
1938 0, /* bitpos */
1939 complain_overflow_signed, /* complain_on_overflow */
1940 ppc64_elf_unhandled_reloc, /* special_function */
1941 "R_PPC64_GOT_TPREL16_HA", /* name */
1942 FALSE, /* partial_inplace */
1943 0, /* src_mask */
1944 0xffff, /* dst_mask */
1945 FALSE), /* pcrel_offset */
1946
1947 HOWTO (R_PPC64_JMP_IREL, /* type */
1948 0, /* rightshift */
1949 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1950 0, /* bitsize */
1951 FALSE, /* pc_relative */
1952 0, /* bitpos */
1953 complain_overflow_dont, /* complain_on_overflow */
1954 ppc64_elf_unhandled_reloc, /* special_function */
1955 "R_PPC64_JMP_IREL", /* name */
1956 FALSE, /* partial_inplace */
1957 0, /* src_mask */
1958 0, /* dst_mask */
1959 FALSE), /* pcrel_offset */
1960
1961 HOWTO (R_PPC64_IRELATIVE, /* type */
1962 0, /* rightshift */
1963 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1964 64, /* bitsize */
1965 FALSE, /* pc_relative */
1966 0, /* bitpos */
1967 complain_overflow_dont, /* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_IRELATIVE", /* name */
1970 FALSE, /* partial_inplace */
1971 0, /* src_mask */
1972 ONES (64), /* dst_mask */
1973 FALSE), /* pcrel_offset */
1974
1975 /* A 16 bit relative relocation. */
1976 HOWTO (R_PPC64_REL16, /* type */
1977 0, /* rightshift */
1978 1, /* size (0 = byte, 1 = short, 2 = long) */
1979 16, /* bitsize */
1980 TRUE, /* pc_relative */
1981 0, /* bitpos */
1982 complain_overflow_signed, /* complain_on_overflow */
1983 bfd_elf_generic_reloc, /* special_function */
1984 "R_PPC64_REL16", /* name */
1985 FALSE, /* partial_inplace */
1986 0, /* src_mask */
1987 0xffff, /* dst_mask */
1988 TRUE), /* pcrel_offset */
1989
1990 /* A 16 bit relative relocation without overflow. */
1991 HOWTO (R_PPC64_REL16_LO, /* type */
1992 0, /* rightshift */
1993 1, /* size (0 = byte, 1 = short, 2 = long) */
1994 16, /* bitsize */
1995 TRUE, /* pc_relative */
1996 0, /* bitpos */
1997 complain_overflow_dont,/* complain_on_overflow */
1998 bfd_elf_generic_reloc, /* special_function */
1999 "R_PPC64_REL16_LO", /* name */
2000 FALSE, /* partial_inplace */
2001 0, /* src_mask */
2002 0xffff, /* dst_mask */
2003 TRUE), /* pcrel_offset */
2004
2005 /* The high order 16 bits of a relative address. */
2006 HOWTO (R_PPC64_REL16_HI, /* type */
2007 16, /* rightshift */
2008 1, /* size (0 = byte, 1 = short, 2 = long) */
2009 16, /* bitsize */
2010 TRUE, /* pc_relative */
2011 0, /* bitpos */
2012 complain_overflow_signed, /* complain_on_overflow */
2013 bfd_elf_generic_reloc, /* special_function */
2014 "R_PPC64_REL16_HI", /* name */
2015 FALSE, /* partial_inplace */
2016 0, /* src_mask */
2017 0xffff, /* dst_mask */
2018 TRUE), /* pcrel_offset */
2019
2020 /* The high order 16 bits of a relative address, plus 1 if the contents of
2021 the low 16 bits, treated as a signed number, is negative. */
2022 HOWTO (R_PPC64_REL16_HA, /* type */
2023 16, /* rightshift */
2024 1, /* size (0 = byte, 1 = short, 2 = long) */
2025 16, /* bitsize */
2026 TRUE, /* pc_relative */
2027 0, /* bitpos */
2028 complain_overflow_signed, /* complain_on_overflow */
2029 ppc64_elf_ha_reloc, /* special_function */
2030 "R_PPC64_REL16_HA", /* name */
2031 FALSE, /* partial_inplace */
2032 0, /* src_mask */
2033 0xffff, /* dst_mask */
2034 TRUE), /* pcrel_offset */
2035
2036 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2037 HOWTO (R_PPC64_REL16DX_HA, /* type */
2038 16, /* rightshift */
2039 2, /* size (0 = byte, 1 = short, 2 = long) */
2040 16, /* bitsize */
2041 TRUE, /* pc_relative */
2042 0, /* bitpos */
2043 complain_overflow_signed, /* complain_on_overflow */
2044 ppc64_elf_ha_reloc, /* special_function */
2045 "R_PPC64_REL16DX_HA", /* name */
2046 FALSE, /* partial_inplace */
2047 0, /* src_mask */
2048 0x1fffc1, /* dst_mask */
2049 TRUE), /* pcrel_offset */
2050
2051 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2052 HOWTO (R_PPC64_16DX_HA, /* type */
2053 16, /* rightshift */
2054 2, /* size (0 = byte, 1 = short, 2 = long) */
2055 16, /* bitsize */
2056 FALSE, /* pc_relative */
2057 0, /* bitpos */
2058 complain_overflow_signed, /* complain_on_overflow */
2059 ppc64_elf_ha_reloc, /* special_function */
2060 "R_PPC64_16DX_HA", /* name */
2061 FALSE, /* partial_inplace */
2062 0, /* src_mask */
2063 0x1fffc1, /* dst_mask */
2064 FALSE), /* pcrel_offset */
2065
2066 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2067 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2068 16, /* rightshift */
2069 1, /* size (0 = byte, 1 = short, 2 = long) */
2070 16, /* bitsize */
2071 FALSE, /* pc_relative */
2072 0, /* bitpos */
2073 complain_overflow_dont, /* complain_on_overflow */
2074 bfd_elf_generic_reloc, /* special_function */
2075 "R_PPC64_ADDR16_HIGH", /* name */
2076 FALSE, /* partial_inplace */
2077 0, /* src_mask */
2078 0xffff, /* dst_mask */
2079 FALSE), /* pcrel_offset */
2080
2081 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2082 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2083 16, /* rightshift */
2084 1, /* size (0 = byte, 1 = short, 2 = long) */
2085 16, /* bitsize */
2086 FALSE, /* pc_relative */
2087 0, /* bitpos */
2088 complain_overflow_dont, /* complain_on_overflow */
2089 ppc64_elf_ha_reloc, /* special_function */
2090 "R_PPC64_ADDR16_HIGHA", /* name */
2091 FALSE, /* partial_inplace */
2092 0, /* src_mask */
2093 0xffff, /* dst_mask */
2094 FALSE), /* pcrel_offset */
2095
2096 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2097 HOWTO (R_PPC64_DTPREL16_HIGH,
2098 16, /* rightshift */
2099 1, /* size (0 = byte, 1 = short, 2 = long) */
2100 16, /* bitsize */
2101 FALSE, /* pc_relative */
2102 0, /* bitpos */
2103 complain_overflow_dont, /* complain_on_overflow */
2104 ppc64_elf_unhandled_reloc, /* special_function */
2105 "R_PPC64_DTPREL16_HIGH", /* name */
2106 FALSE, /* partial_inplace */
2107 0, /* src_mask */
2108 0xffff, /* dst_mask */
2109 FALSE), /* pcrel_offset */
2110
2111 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2112 HOWTO (R_PPC64_DTPREL16_HIGHA,
2113 16, /* rightshift */
2114 1, /* size (0 = byte, 1 = short, 2 = long) */
2115 16, /* bitsize */
2116 FALSE, /* pc_relative */
2117 0, /* bitpos */
2118 complain_overflow_dont, /* complain_on_overflow */
2119 ppc64_elf_unhandled_reloc, /* special_function */
2120 "R_PPC64_DTPREL16_HIGHA", /* name */
2121 FALSE, /* partial_inplace */
2122 0, /* src_mask */
2123 0xffff, /* dst_mask */
2124 FALSE), /* pcrel_offset */
2125
2126 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2127 HOWTO (R_PPC64_TPREL16_HIGH,
2128 16, /* rightshift */
2129 1, /* size (0 = byte, 1 = short, 2 = long) */
2130 16, /* bitsize */
2131 FALSE, /* pc_relative */
2132 0, /* bitpos */
2133 complain_overflow_dont, /* complain_on_overflow */
2134 ppc64_elf_unhandled_reloc, /* special_function */
2135 "R_PPC64_TPREL16_HIGH", /* name */
2136 FALSE, /* partial_inplace */
2137 0, /* src_mask */
2138 0xffff, /* dst_mask */
2139 FALSE), /* pcrel_offset */
2140
2141 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2142 HOWTO (R_PPC64_TPREL16_HIGHA,
2143 16, /* rightshift */
2144 1, /* size (0 = byte, 1 = short, 2 = long) */
2145 16, /* bitsize */
2146 FALSE, /* pc_relative */
2147 0, /* bitpos */
2148 complain_overflow_dont, /* complain_on_overflow */
2149 ppc64_elf_unhandled_reloc, /* special_function */
2150 "R_PPC64_TPREL16_HIGHA", /* name */
2151 FALSE, /* partial_inplace */
2152 0, /* src_mask */
2153 0xffff, /* dst_mask */
2154 FALSE), /* pcrel_offset */
2155
2156 /* Marker reloc on ELFv2 large-model function entry. */
2157 HOWTO (R_PPC64_ENTRY,
2158 0, /* rightshift */
2159 2, /* size (0 = byte, 1 = short, 2 = long) */
2160 32, /* bitsize */
2161 FALSE, /* pc_relative */
2162 0, /* bitpos */
2163 complain_overflow_dont, /* complain_on_overflow */
2164 bfd_elf_generic_reloc, /* special_function */
2165 "R_PPC64_ENTRY", /* name */
2166 FALSE, /* partial_inplace */
2167 0, /* src_mask */
2168 0, /* dst_mask */
2169 FALSE), /* pcrel_offset */
2170
2171 /* Like ADDR64, but use local entry point of function. */
2172 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2173 0, /* rightshift */
2174 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2175 64, /* bitsize */
2176 FALSE, /* pc_relative */
2177 0, /* bitpos */
2178 complain_overflow_dont, /* complain_on_overflow */
2179 bfd_elf_generic_reloc, /* special_function */
2180 "R_PPC64_ADDR64_LOCAL", /* name */
2181 FALSE, /* partial_inplace */
2182 0, /* src_mask */
2183 ONES (64), /* dst_mask */
2184 FALSE), /* pcrel_offset */
2185
2186 /* GNU extension to record C++ vtable hierarchy. */
2187 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2188 0, /* rightshift */
2189 0, /* size (0 = byte, 1 = short, 2 = long) */
2190 0, /* bitsize */
2191 FALSE, /* pc_relative */
2192 0, /* bitpos */
2193 complain_overflow_dont, /* complain_on_overflow */
2194 NULL, /* special_function */
2195 "R_PPC64_GNU_VTINHERIT", /* name */
2196 FALSE, /* partial_inplace */
2197 0, /* src_mask */
2198 0, /* dst_mask */
2199 FALSE), /* pcrel_offset */
2200
2201 /* GNU extension to record C++ vtable member usage. */
2202 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2203 0, /* rightshift */
2204 0, /* size (0 = byte, 1 = short, 2 = long) */
2205 0, /* bitsize */
2206 FALSE, /* pc_relative */
2207 0, /* bitpos */
2208 complain_overflow_dont, /* complain_on_overflow */
2209 NULL, /* special_function */
2210 "R_PPC64_GNU_VTENTRY", /* name */
2211 FALSE, /* partial_inplace */
2212 0, /* src_mask */
2213 0, /* dst_mask */
2214 FALSE), /* pcrel_offset */
2215 };
2216
2217 \f
2218 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2219 be done. */
2220
2221 static void
2222 ppc_howto_init (void)
2223 {
2224 unsigned int i, type;
2225
2226 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2227 {
2228 type = ppc64_elf_howto_raw[i].type;
2229 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2230 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2231 }
2232 }
2233
2234 static reloc_howto_type *
2235 ppc64_elf_reloc_type_lookup (bfd *abfd,
2236 bfd_reloc_code_real_type code)
2237 {
2238 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2239
2240 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2241 /* Initialize howto table if needed. */
2242 ppc_howto_init ();
2243
2244 switch (code)
2245 {
2246 default:
2247 /* xgettext:c-format */
2248 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
2249 bfd_set_error (bfd_error_bad_value);
2250 return NULL;
2251
2252 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2253 break;
2254 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2255 break;
2256 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2257 break;
2258 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2259 break;
2260 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2261 break;
2262 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2263 break;
2264 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2265 break;
2266 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2267 break;
2268 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2269 break;
2270 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2271 break;
2272 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2273 break;
2274 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2275 break;
2276 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2277 break;
2278 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2279 break;
2280 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2281 break;
2282 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2283 break;
2284 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2285 break;
2286 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2287 break;
2288 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2289 break;
2290 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2291 break;
2292 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2293 break;
2294 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2295 break;
2296 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2297 break;
2298 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2299 break;
2300 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2301 break;
2302 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2303 break;
2304 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2305 break;
2306 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2307 break;
2308 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2309 break;
2310 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2311 break;
2312 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2313 break;
2314 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2315 break;
2316 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2317 break;
2318 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2319 break;
2320 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2321 break;
2322 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2323 break;
2324 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2325 break;
2326 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2327 break;
2328 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2329 break;
2330 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2331 break;
2332 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2333 break;
2334 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2335 break;
2336 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2337 break;
2338 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2339 break;
2340 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2341 break;
2342 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2343 break;
2344 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2345 break;
2346 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2347 break;
2348 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2349 break;
2350 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2351 break;
2352 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2353 break;
2354 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2355 break;
2356 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2357 break;
2358 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2359 break;
2360 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2361 break;
2362 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2363 break;
2364 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2365 break;
2366 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2367 break;
2368 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2369 break;
2370 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2371 break;
2372 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2373 break;
2374 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2375 break;
2376 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2377 break;
2378 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2379 break;
2380 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2381 break;
2382 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2383 break;
2384 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2385 break;
2386 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2387 break;
2388 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2389 break;
2390 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2391 break;
2392 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2393 break;
2394 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2395 break;
2396 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2397 break;
2398 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2399 break;
2400 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2401 break;
2402 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2403 break;
2404 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2405 break;
2406 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2407 break;
2408 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2409 break;
2410 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2411 break;
2412 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2413 break;
2414 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2415 break;
2416 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2417 break;
2418 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2419 break;
2420 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2421 break;
2422 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2423 break;
2424 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2425 break;
2426 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2427 break;
2428 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2429 break;
2430 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2431 break;
2432 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2433 break;
2434 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2435 break;
2436 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2437 break;
2438 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2439 break;
2440 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2441 break;
2442 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2443 break;
2444 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2445 break;
2446 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2447 break;
2448 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2449 break;
2450 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2451 break;
2452 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2453 break;
2454 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2455 break;
2456 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2457 break;
2458 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2459 break;
2460 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2461 break;
2462 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2463 break;
2464 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2465 break;
2466 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2467 break;
2468 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2469 break;
2470 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2471 break;
2472 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2473 break;
2474 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2475 break;
2476 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2477 break;
2478 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2479 break;
2480 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2481 break;
2482 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2483 break;
2484 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2485 break;
2486 }
2487
2488 return ppc64_elf_howto_table[r];
2489 };
2490
2491 static reloc_howto_type *
2492 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2493 const char *r_name)
2494 {
2495 unsigned int i;
2496
2497 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2498 if (ppc64_elf_howto_raw[i].name != NULL
2499 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2500 return &ppc64_elf_howto_raw[i];
2501
2502
2503 return NULL;
2504 }
2505
2506 /* Set the howto pointer for a PowerPC ELF reloc. */
2507
2508 static bfd_boolean
2509 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2510 Elf_Internal_Rela *dst)
2511 {
2512 unsigned int type;
2513
2514 /* Initialize howto table if needed. */
2515 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2516 ppc_howto_init ();
2517
2518 type = ELF64_R_TYPE (dst->r_info);
2519 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2520 {
2521 /* xgettext:c-format */
2522 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2523 abfd, type);
2524 bfd_set_error (bfd_error_bad_value);
2525 return FALSE;
2526 }
2527 cache_ptr->howto = ppc64_elf_howto_table[type];
2528 if (cache_ptr->howto == NULL || cache_ptr->howto->name == NULL)
2529 {
2530 /* xgettext:c-format */
2531 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2532 abfd, type);
2533 bfd_set_error (bfd_error_bad_value);
2534 return FALSE;
2535 }
2536
2537 return TRUE;
2538 }
2539
2540 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2541
2542 static bfd_reloc_status_type
2543 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2544 void *data, asection *input_section,
2545 bfd *output_bfd, char **error_message)
2546 {
2547 enum elf_ppc64_reloc_type r_type;
2548 long insn;
2549 bfd_size_type octets;
2550 bfd_vma value;
2551
2552 /* If this is a relocatable link (output_bfd test tells us), just
2553 call the generic function. Any adjustment will be done at final
2554 link time. */
2555 if (output_bfd != NULL)
2556 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2557 input_section, output_bfd, error_message);
2558
2559 /* Adjust the addend for sign extension of the low 16 bits.
2560 We won't actually be using the low 16 bits, so trashing them
2561 doesn't matter. */
2562 reloc_entry->addend += 0x8000;
2563 r_type = reloc_entry->howto->type;
2564 if (r_type != R_PPC64_REL16DX_HA)
2565 return bfd_reloc_continue;
2566
2567 value = 0;
2568 if (!bfd_is_com_section (symbol->section))
2569 value = symbol->value;
2570 value += (reloc_entry->addend
2571 + symbol->section->output_offset
2572 + symbol->section->output_section->vma);
2573 value -= (reloc_entry->address
2574 + input_section->output_offset
2575 + input_section->output_section->vma);
2576 value = (bfd_signed_vma) value >> 16;
2577
2578 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2579 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2580 insn &= ~0x1fffc1;
2581 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2582 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2583 if (value + 0x8000 > 0xffff)
2584 return bfd_reloc_overflow;
2585 return bfd_reloc_ok;
2586 }
2587
2588 static bfd_reloc_status_type
2589 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2590 void *data, asection *input_section,
2591 bfd *output_bfd, char **error_message)
2592 {
2593 if (output_bfd != NULL)
2594 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2595 input_section, output_bfd, error_message);
2596
2597 if (strcmp (symbol->section->name, ".opd") == 0
2598 && (symbol->section->owner->flags & DYNAMIC) == 0)
2599 {
2600 bfd_vma dest = opd_entry_value (symbol->section,
2601 symbol->value + reloc_entry->addend,
2602 NULL, NULL, FALSE);
2603 if (dest != (bfd_vma) -1)
2604 reloc_entry->addend = dest - (symbol->value
2605 + symbol->section->output_section->vma
2606 + symbol->section->output_offset);
2607 }
2608 else
2609 {
2610 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2611
2612 if (symbol->section->owner != abfd
2613 && symbol->section->owner != NULL
2614 && abiversion (symbol->section->owner) >= 2)
2615 {
2616 unsigned int i;
2617
2618 for (i = 0; i < symbol->section->owner->symcount; ++i)
2619 {
2620 asymbol *symdef = symbol->section->owner->outsymbols[i];
2621
2622 if (strcmp (symdef->name, symbol->name) == 0)
2623 {
2624 elfsym = (elf_symbol_type *) symdef;
2625 break;
2626 }
2627 }
2628 }
2629 reloc_entry->addend
2630 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2631 }
2632 return bfd_reloc_continue;
2633 }
2634
2635 static bfd_reloc_status_type
2636 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2637 void *data, asection *input_section,
2638 bfd *output_bfd, char **error_message)
2639 {
2640 long insn;
2641 enum elf_ppc64_reloc_type r_type;
2642 bfd_size_type octets;
2643 /* Assume 'at' branch hints. */
2644 bfd_boolean is_isa_v2 = TRUE;
2645
2646 /* If this is a relocatable link (output_bfd test tells us), just
2647 call the generic function. Any adjustment will be done at final
2648 link time. */
2649 if (output_bfd != NULL)
2650 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2651 input_section, output_bfd, error_message);
2652
2653 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2654 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2655 insn &= ~(0x01 << 21);
2656 r_type = reloc_entry->howto->type;
2657 if (r_type == R_PPC64_ADDR14_BRTAKEN
2658 || r_type == R_PPC64_REL14_BRTAKEN)
2659 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2660
2661 if (is_isa_v2)
2662 {
2663 /* Set 'a' bit. This is 0b00010 in BO field for branch
2664 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2665 for branch on CTR insns (BO == 1a00t or 1a01t). */
2666 if ((insn & (0x14 << 21)) == (0x04 << 21))
2667 insn |= 0x02 << 21;
2668 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2669 insn |= 0x08 << 21;
2670 else
2671 goto out;
2672 }
2673 else
2674 {
2675 bfd_vma target = 0;
2676 bfd_vma from;
2677
2678 if (!bfd_is_com_section (symbol->section))
2679 target = symbol->value;
2680 target += symbol->section->output_section->vma;
2681 target += symbol->section->output_offset;
2682 target += reloc_entry->addend;
2683
2684 from = (reloc_entry->address
2685 + input_section->output_offset
2686 + input_section->output_section->vma);
2687
2688 /* Invert 'y' bit if not the default. */
2689 if ((bfd_signed_vma) (target - from) < 0)
2690 insn ^= 0x01 << 21;
2691 }
2692 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2693 out:
2694 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2695 input_section, output_bfd, error_message);
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712 return bfd_reloc_continue;
2713 }
2714
2715 static bfd_reloc_status_type
2716 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2717 void *data, asection *input_section,
2718 bfd *output_bfd, char **error_message)
2719 {
2720 /* If this is a relocatable link (output_bfd test tells us), just
2721 call the generic function. Any adjustment will be done at final
2722 link time. */
2723 if (output_bfd != NULL)
2724 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2725 input_section, output_bfd, error_message);
2726
2727 /* Subtract the symbol section base address. */
2728 reloc_entry->addend -= symbol->section->output_section->vma;
2729
2730 /* Adjust the addend for sign extension of the low 16 bits. */
2731 reloc_entry->addend += 0x8000;
2732 return bfd_reloc_continue;
2733 }
2734
2735 static bfd_reloc_status_type
2736 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2737 void *data, asection *input_section,
2738 bfd *output_bfd, char **error_message)
2739 {
2740 bfd_vma TOCstart;
2741
2742 /* If this is a relocatable link (output_bfd test tells us), just
2743 call the generic function. Any adjustment will be done at final
2744 link time. */
2745 if (output_bfd != NULL)
2746 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2747 input_section, output_bfd, error_message);
2748
2749 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2750 if (TOCstart == 0)
2751 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2752
2753 /* Subtract the TOC base address. */
2754 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2755 return bfd_reloc_continue;
2756 }
2757
2758 static bfd_reloc_status_type
2759 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2760 void *data, asection *input_section,
2761 bfd *output_bfd, char **error_message)
2762 {
2763 bfd_vma TOCstart;
2764
2765 /* If this is a relocatable link (output_bfd test tells us), just
2766 call the generic function. Any adjustment will be done at final
2767 link time. */
2768 if (output_bfd != NULL)
2769 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2770 input_section, output_bfd, error_message);
2771
2772 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2773 if (TOCstart == 0)
2774 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2775
2776 /* Subtract the TOC base address. */
2777 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2778
2779 /* Adjust the addend for sign extension of the low 16 bits. */
2780 reloc_entry->addend += 0x8000;
2781 return bfd_reloc_continue;
2782 }
2783
2784 static bfd_reloc_status_type
2785 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2786 void *data, asection *input_section,
2787 bfd *output_bfd, char **error_message)
2788 {
2789 bfd_vma TOCstart;
2790 bfd_size_type octets;
2791
2792 /* If this is a relocatable link (output_bfd test tells us), just
2793 call the generic function. Any adjustment will be done at final
2794 link time. */
2795 if (output_bfd != NULL)
2796 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2797 input_section, output_bfd, error_message);
2798
2799 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2800 if (TOCstart == 0)
2801 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2802
2803 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2804 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2805 return bfd_reloc_ok;
2806 }
2807
2808 static bfd_reloc_status_type
2809 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2810 void *data, asection *input_section,
2811 bfd *output_bfd, char **error_message)
2812 {
2813 /* If this is a relocatable link (output_bfd test tells us), just
2814 call the generic function. Any adjustment will be done at final
2815 link time. */
2816 if (output_bfd != NULL)
2817 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2818 input_section, output_bfd, error_message);
2819
2820 if (error_message != NULL)
2821 {
2822 static char buf[60];
2823 sprintf (buf, "generic linker can't handle %s",
2824 reloc_entry->howto->name);
2825 *error_message = buf;
2826 }
2827 return bfd_reloc_dangerous;
2828 }
2829
2830 /* Track GOT entries needed for a given symbol. We might need more
2831 than one got entry per symbol. */
2832 struct got_entry
2833 {
2834 struct got_entry *next;
2835
2836 /* The symbol addend that we'll be placing in the GOT. */
2837 bfd_vma addend;
2838
2839 /* Unlike other ELF targets, we use separate GOT entries for the same
2840 symbol referenced from different input files. This is to support
2841 automatic multiple TOC/GOT sections, where the TOC base can vary
2842 from one input file to another. After partitioning into TOC groups
2843 we merge entries within the group.
2844
2845 Point to the BFD owning this GOT entry. */
2846 bfd *owner;
2847
2848 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2849 TLS_TPREL or TLS_DTPREL for tls entries. */
2850 unsigned char tls_type;
2851
2852 /* Non-zero if got.ent points to real entry. */
2853 unsigned char is_indirect;
2854
2855 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2856 union
2857 {
2858 bfd_signed_vma refcount;
2859 bfd_vma offset;
2860 struct got_entry *ent;
2861 } got;
2862 };
2863
2864 /* The same for PLT. */
2865 struct plt_entry
2866 {
2867 struct plt_entry *next;
2868
2869 bfd_vma addend;
2870
2871 union
2872 {
2873 bfd_signed_vma refcount;
2874 bfd_vma offset;
2875 } plt;
2876 };
2877
2878 struct ppc64_elf_obj_tdata
2879 {
2880 struct elf_obj_tdata elf;
2881
2882 /* Shortcuts to dynamic linker sections. */
2883 asection *got;
2884 asection *relgot;
2885
2886 /* Used during garbage collection. We attach global symbols defined
2887 on removed .opd entries to this section so that the sym is removed. */
2888 asection *deleted_section;
2889
2890 /* TLS local dynamic got entry handling. Support for multiple GOT
2891 sections means we potentially need one of these for each input bfd. */
2892 struct got_entry tlsld_got;
2893
2894 union {
2895 /* A copy of relocs before they are modified for --emit-relocs. */
2896 Elf_Internal_Rela *relocs;
2897
2898 /* Section contents. */
2899 bfd_byte *contents;
2900 } opd;
2901
2902 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2903 the reloc to be in the range -32768 to 32767. */
2904 unsigned int has_small_toc_reloc : 1;
2905
2906 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2907 instruction not one we handle. */
2908 unsigned int unexpected_toc_insn : 1;
2909 };
2910
2911 #define ppc64_elf_tdata(bfd) \
2912 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2913
2914 #define ppc64_tlsld_got(bfd) \
2915 (&ppc64_elf_tdata (bfd)->tlsld_got)
2916
2917 #define is_ppc64_elf(bfd) \
2918 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2919 && elf_object_id (bfd) == PPC64_ELF_DATA)
2920
2921 /* Override the generic function because we store some extras. */
2922
2923 static bfd_boolean
2924 ppc64_elf_mkobject (bfd *abfd)
2925 {
2926 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2927 PPC64_ELF_DATA);
2928 }
2929
2930 /* Fix bad default arch selected for a 64 bit input bfd when the
2931 default is 32 bit. Also select arch based on apuinfo. */
2932
2933 static bfd_boolean
2934 ppc64_elf_object_p (bfd *abfd)
2935 {
2936 if (!abfd->arch_info->the_default)
2937 return TRUE;
2938
2939 if (abfd->arch_info->bits_per_word == 32)
2940 {
2941 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2942
2943 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2944 {
2945 /* Relies on arch after 32 bit default being 64 bit default. */
2946 abfd->arch_info = abfd->arch_info->next;
2947 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2948 }
2949 }
2950 return _bfd_elf_ppc_set_arch (abfd);
2951 }
2952
2953 /* Support for core dump NOTE sections. */
2954
2955 static bfd_boolean
2956 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2957 {
2958 size_t offset, size;
2959
2960 if (note->descsz != 504)
2961 return FALSE;
2962
2963 /* pr_cursig */
2964 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2965
2966 /* pr_pid */
2967 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2968
2969 /* pr_reg */
2970 offset = 112;
2971 size = 384;
2972
2973 /* Make a ".reg/999" section. */
2974 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2975 size, note->descpos + offset);
2976 }
2977
2978 static bfd_boolean
2979 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2980 {
2981 if (note->descsz != 136)
2982 return FALSE;
2983
2984 elf_tdata (abfd)->core->pid
2985 = bfd_get_32 (abfd, note->descdata + 24);
2986 elf_tdata (abfd)->core->program
2987 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2988 elf_tdata (abfd)->core->command
2989 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2990
2991 return TRUE;
2992 }
2993
2994 static char *
2995 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2996 ...)
2997 {
2998 switch (note_type)
2999 {
3000 default:
3001 return NULL;
3002
3003 case NT_PRPSINFO:
3004 {
3005 char data[136];
3006 va_list ap;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, sizeof (data));
3010 strncpy (data + 40, va_arg (ap, const char *), 16);
3011 strncpy (data + 56, va_arg (ap, const char *), 80);
3012 va_end (ap);
3013 return elfcore_write_note (abfd, buf, bufsiz,
3014 "CORE", note_type, data, sizeof (data));
3015 }
3016
3017 case NT_PRSTATUS:
3018 {
3019 char data[504];
3020 va_list ap;
3021 long pid;
3022 int cursig;
3023 const void *greg;
3024
3025 va_start (ap, note_type);
3026 memset (data, 0, 112);
3027 pid = va_arg (ap, long);
3028 bfd_put_32 (abfd, pid, data + 32);
3029 cursig = va_arg (ap, int);
3030 bfd_put_16 (abfd, cursig, data + 12);
3031 greg = va_arg (ap, const void *);
3032 memcpy (data + 112, greg, 384);
3033 memset (data + 496, 0, 8);
3034 va_end (ap);
3035 return elfcore_write_note (abfd, buf, bufsiz,
3036 "CORE", note_type, data, sizeof (data));
3037 }
3038 }
3039 }
3040
3041 /* Add extra PPC sections. */
3042
3043 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3044 {
3045 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3046 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3047 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3048 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3049 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3050 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3051 { NULL, 0, 0, 0, 0 }
3052 };
3053
3054 enum _ppc64_sec_type {
3055 sec_normal = 0,
3056 sec_opd = 1,
3057 sec_toc = 2
3058 };
3059
3060 struct _ppc64_elf_section_data
3061 {
3062 struct bfd_elf_section_data elf;
3063
3064 union
3065 {
3066 /* An array with one entry for each opd function descriptor,
3067 and some spares since opd entries may be either 16 or 24 bytes. */
3068 #define OPD_NDX(OFF) ((OFF) >> 4)
3069 struct _opd_sec_data
3070 {
3071 /* Points to the function code section for local opd entries. */
3072 asection **func_sec;
3073
3074 /* After editing .opd, adjust references to opd local syms. */
3075 long *adjust;
3076 } opd;
3077
3078 /* An array for toc sections, indexed by offset/8. */
3079 struct _toc_sec_data
3080 {
3081 /* Specifies the relocation symbol index used at a given toc offset. */
3082 unsigned *symndx;
3083
3084 /* And the relocation addend. */
3085 bfd_vma *add;
3086 } toc;
3087 } u;
3088
3089 enum _ppc64_sec_type sec_type:2;
3090
3091 /* Flag set when small branches are detected. Used to
3092 select suitable defaults for the stub group size. */
3093 unsigned int has_14bit_branch:1;
3094 };
3095
3096 #define ppc64_elf_section_data(sec) \
3097 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3098
3099 static bfd_boolean
3100 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3101 {
3102 if (!sec->used_by_bfd)
3103 {
3104 struct _ppc64_elf_section_data *sdata;
3105 bfd_size_type amt = sizeof (*sdata);
3106
3107 sdata = bfd_zalloc (abfd, amt);
3108 if (sdata == NULL)
3109 return FALSE;
3110 sec->used_by_bfd = sdata;
3111 }
3112
3113 return _bfd_elf_new_section_hook (abfd, sec);
3114 }
3115
3116 static struct _opd_sec_data *
3117 get_opd_info (asection * sec)
3118 {
3119 if (sec != NULL
3120 && ppc64_elf_section_data (sec) != NULL
3121 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3122 return &ppc64_elf_section_data (sec)->u.opd;
3123 return NULL;
3124 }
3125 \f
3126 /* Parameters for the qsort hook. */
3127 static bfd_boolean synthetic_relocatable;
3128 static asection *synthetic_opd;
3129
3130 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3131
3132 static int
3133 compare_symbols (const void *ap, const void *bp)
3134 {
3135 const asymbol *a = * (const asymbol **) ap;
3136 const asymbol *b = * (const asymbol **) bp;
3137
3138 /* Section symbols first. */
3139 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3140 return -1;
3141 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3142 return 1;
3143
3144 /* then .opd symbols. */
3145 if (synthetic_opd != NULL)
3146 {
3147 if (strcmp (a->section->name, ".opd") == 0
3148 && strcmp (b->section->name, ".opd") != 0)
3149 return -1;
3150 if (strcmp (a->section->name, ".opd") != 0
3151 && strcmp (b->section->name, ".opd") == 0)
3152 return 1;
3153 }
3154
3155 /* then other code symbols. */
3156 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3157 == (SEC_CODE | SEC_ALLOC)
3158 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3159 != (SEC_CODE | SEC_ALLOC))
3160 return -1;
3161
3162 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3163 != (SEC_CODE | SEC_ALLOC)
3164 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3165 == (SEC_CODE | SEC_ALLOC))
3166 return 1;
3167
3168 if (synthetic_relocatable)
3169 {
3170 if (a->section->id < b->section->id)
3171 return -1;
3172
3173 if (a->section->id > b->section->id)
3174 return 1;
3175 }
3176
3177 if (a->value + a->section->vma < b->value + b->section->vma)
3178 return -1;
3179
3180 if (a->value + a->section->vma > b->value + b->section->vma)
3181 return 1;
3182
3183 /* For syms with the same value, prefer strong dynamic global function
3184 syms over other syms. */
3185 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3186 return -1;
3187
3188 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3189 return 1;
3190
3191 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3192 return -1;
3193
3194 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3195 return 1;
3196
3197 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3198 return -1;
3199
3200 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3201 return 1;
3202
3203 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3204 return -1;
3205
3206 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3207 return 1;
3208
3209 return a > b;
3210 }
3211
3212 /* Search SYMS for a symbol of the given VALUE. */
3213
3214 static asymbol *
3215 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3216 {
3217 long mid;
3218
3219 if (id == (unsigned) -1)
3220 {
3221 while (lo < hi)
3222 {
3223 mid = (lo + hi) >> 1;
3224 if (syms[mid]->value + syms[mid]->section->vma < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value + syms[mid]->section->vma > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 else
3233 {
3234 while (lo < hi)
3235 {
3236 mid = (lo + hi) >> 1;
3237 if (syms[mid]->section->id < id)
3238 lo = mid + 1;
3239 else if (syms[mid]->section->id > id)
3240 hi = mid;
3241 else if (syms[mid]->value < value)
3242 lo = mid + 1;
3243 else if (syms[mid]->value > value)
3244 hi = mid;
3245 else
3246 return syms[mid];
3247 }
3248 }
3249 return NULL;
3250 }
3251
3252 static bfd_boolean
3253 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3254 {
3255 bfd_vma vma = *(bfd_vma *) ptr;
3256 return ((section->flags & SEC_ALLOC) != 0
3257 && section->vma <= vma
3258 && vma < section->vma + section->size);
3259 }
3260
3261 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3262 entry syms. Also generate @plt symbols for the glink branch table.
3263 Returns count of synthetic symbols in RET or -1 on error. */
3264
3265 static long
3266 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3267 long static_count, asymbol **static_syms,
3268 long dyn_count, asymbol **dyn_syms,
3269 asymbol **ret)
3270 {
3271 asymbol *s;
3272 size_t i, j, count;
3273 char *names;
3274 size_t symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3275 asection *opd = NULL;
3276 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3277 asymbol **syms;
3278 int abi = abiversion (abfd);
3279
3280 *ret = NULL;
3281
3282 if (abi < 2)
3283 {
3284 opd = bfd_get_section_by_name (abfd, ".opd");
3285 if (opd == NULL && abi == 1)
3286 return 0;
3287 }
3288
3289 syms = NULL;
3290 codesecsym = 0;
3291 codesecsymend = 0;
3292 secsymend = 0;
3293 opdsymend = 0;
3294 symcount = 0;
3295 if (opd != NULL)
3296 {
3297 symcount = static_count;
3298 if (!relocatable)
3299 symcount += dyn_count;
3300 if (symcount == 0)
3301 return 0;
3302
3303 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3304 if (syms == NULL)
3305 return -1;
3306
3307 if (!relocatable && static_count != 0 && dyn_count != 0)
3308 {
3309 /* Use both symbol tables. */
3310 memcpy (syms, static_syms, static_count * sizeof (*syms));
3311 memcpy (syms + static_count, dyn_syms,
3312 (dyn_count + 1) * sizeof (*syms));
3313 }
3314 else if (!relocatable && static_count == 0)
3315 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3316 else
3317 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3318
3319 /* Trim uninteresting symbols. Interesting symbols are section,
3320 function, and notype symbols. */
3321 for (i = 0, j = 0; i < symcount; ++i)
3322 if ((syms[i]->flags & (BSF_FILE | BSF_OBJECT | BSF_THREAD_LOCAL
3323 | BSF_RELC | BSF_SRELC)) == 0)
3324 syms[j++] = syms[i];
3325 symcount = j;
3326
3327 synthetic_relocatable = relocatable;
3328 synthetic_opd = opd;
3329 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3330
3331 if (!relocatable && symcount > 1)
3332 {
3333 /* Trim duplicate syms, since we may have merged the normal and
3334 dynamic symbols. Actually, we only care about syms that have
3335 different values, so trim any with the same value. */
3336 for (i = 1, j = 1; i < symcount; ++i)
3337 if (syms[i - 1]->value + syms[i - 1]->section->vma
3338 != syms[i]->value + syms[i]->section->vma)
3339 syms[j++] = syms[i];
3340 symcount = j;
3341 }
3342
3343 i = 0;
3344 /* Note that here and in compare_symbols we can't compare opd and
3345 sym->section directly. With separate debug info files, the
3346 symbols will be extracted from the debug file while abfd passed
3347 to this function is the real binary. */
3348 if (strcmp (syms[i]->section->name, ".opd") == 0)
3349 ++i;
3350 codesecsym = i;
3351
3352 for (; i < symcount; ++i)
3353 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3354 | SEC_THREAD_LOCAL))
3355 != (SEC_CODE | SEC_ALLOC))
3356 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3357 break;
3358 codesecsymend = i;
3359
3360 for (; i < symcount; ++i)
3361 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3362 break;
3363 secsymend = i;
3364
3365 for (; i < symcount; ++i)
3366 if (strcmp (syms[i]->section->name, ".opd") != 0)
3367 break;
3368 opdsymend = i;
3369
3370 for (; i < symcount; ++i)
3371 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3372 != (SEC_CODE | SEC_ALLOC))
3373 break;
3374 symcount = i;
3375 }
3376 count = 0;
3377
3378 if (relocatable)
3379 {
3380 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3381 arelent *r;
3382 size_t size;
3383 size_t relcount;
3384
3385 if (opdsymend == secsymend)
3386 goto done;
3387
3388 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3389 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3390 if (relcount == 0)
3391 goto done;
3392
3393 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3394 {
3395 count = -1;
3396 goto done;
3397 }
3398
3399 size = 0;
3400 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3401 {
3402 asymbol *sym;
3403
3404 while (r < opd->relocation + relcount
3405 && r->address < syms[i]->value + opd->vma)
3406 ++r;
3407
3408 if (r == opd->relocation + relcount)
3409 break;
3410
3411 if (r->address != syms[i]->value + opd->vma)
3412 continue;
3413
3414 if (r->howto->type != R_PPC64_ADDR64)
3415 continue;
3416
3417 sym = *r->sym_ptr_ptr;
3418 if (!sym_exists_at (syms, opdsymend, symcount,
3419 sym->section->id, sym->value + r->addend))
3420 {
3421 ++count;
3422 size += sizeof (asymbol);
3423 size += strlen (syms[i]->name) + 2;
3424 }
3425 }
3426
3427 if (size == 0)
3428 goto done;
3429 s = *ret = bfd_malloc (size);
3430 if (s == NULL)
3431 {
3432 count = -1;
3433 goto done;
3434 }
3435
3436 names = (char *) (s + count);
3437
3438 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3439 {
3440 asymbol *sym;
3441
3442 while (r < opd->relocation + relcount
3443 && r->address < syms[i]->value + opd->vma)
3444 ++r;
3445
3446 if (r == opd->relocation + relcount)
3447 break;
3448
3449 if (r->address != syms[i]->value + opd->vma)
3450 continue;
3451
3452 if (r->howto->type != R_PPC64_ADDR64)
3453 continue;
3454
3455 sym = *r->sym_ptr_ptr;
3456 if (!sym_exists_at (syms, opdsymend, symcount,
3457 sym->section->id, sym->value + r->addend))
3458 {
3459 size_t len;
3460
3461 *s = *syms[i];
3462 s->flags |= BSF_SYNTHETIC;
3463 s->section = sym->section;
3464 s->value = sym->value + r->addend;
3465 s->name = names;
3466 *names++ = '.';
3467 len = strlen (syms[i]->name);
3468 memcpy (names, syms[i]->name, len + 1);
3469 names += len + 1;
3470 /* Have udata.p point back to the original symbol this
3471 synthetic symbol was derived from. */
3472 s->udata.p = syms[i];
3473 s++;
3474 }
3475 }
3476 }
3477 else
3478 {
3479 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3480 bfd_byte *contents = NULL;
3481 size_t size;
3482 size_t plt_count = 0;
3483 bfd_vma glink_vma = 0, resolv_vma = 0;
3484 asection *dynamic, *glink = NULL, *relplt = NULL;
3485 arelent *p;
3486
3487 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3488 {
3489 free_contents_and_exit_err:
3490 count = -1;
3491 free_contents_and_exit:
3492 if (contents)
3493 free (contents);
3494 goto done;
3495 }
3496
3497 size = 0;
3498 for (i = secsymend; i < opdsymend; ++i)
3499 {
3500 bfd_vma ent;
3501
3502 /* Ignore bogus symbols. */
3503 if (syms[i]->value > opd->size - 8)
3504 continue;
3505
3506 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3507 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3508 {
3509 ++count;
3510 size += sizeof (asymbol);
3511 size += strlen (syms[i]->name) + 2;
3512 }
3513 }
3514
3515 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3516 if (dyn_count != 0
3517 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3518 {
3519 bfd_byte *dynbuf, *extdyn, *extdynend;
3520 size_t extdynsize;
3521 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3522
3523 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3524 goto free_contents_and_exit_err;
3525
3526 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3527 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3528
3529 extdyn = dynbuf;
3530 extdynend = extdyn + dynamic->size;
3531 for (; extdyn < extdynend; extdyn += extdynsize)
3532 {
3533 Elf_Internal_Dyn dyn;
3534 (*swap_dyn_in) (abfd, extdyn, &dyn);
3535
3536 if (dyn.d_tag == DT_NULL)
3537 break;
3538
3539 if (dyn.d_tag == DT_PPC64_GLINK)
3540 {
3541 /* The first glink stub starts at DT_PPC64_GLINK plus 32.
3542 See comment in ppc64_elf_finish_dynamic_sections. */
3543 glink_vma = dyn.d_un.d_val + 8 * 4;
3544 /* The .glink section usually does not survive the final
3545 link; search for the section (usually .text) where the
3546 glink stubs now reside. */
3547 glink = bfd_sections_find_if (abfd, section_covers_vma,
3548 &glink_vma);
3549 break;
3550 }
3551 }
3552
3553 free (dynbuf);
3554 }
3555
3556 if (glink != NULL)
3557 {
3558 /* Determine __glink trampoline by reading the relative branch
3559 from the first glink stub. */
3560 bfd_byte buf[4];
3561 unsigned int off = 0;
3562
3563 while (bfd_get_section_contents (abfd, glink, buf,
3564 glink_vma + off - glink->vma, 4))
3565 {
3566 unsigned int insn = bfd_get_32 (abfd, buf);
3567 insn ^= B_DOT;
3568 if ((insn & ~0x3fffffc) == 0)
3569 {
3570 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3571 break;
3572 }
3573 off += 4;
3574 if (off > 4)
3575 break;
3576 }
3577
3578 if (resolv_vma)
3579 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3580
3581 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3582 if (relplt != NULL)
3583 {
3584 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3585 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3586 goto free_contents_and_exit_err;
3587
3588 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3589 size += plt_count * sizeof (asymbol);
3590
3591 p = relplt->relocation;
3592 for (i = 0; i < plt_count; i++, p++)
3593 {
3594 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3595 if (p->addend != 0)
3596 size += sizeof ("+0x") - 1 + 16;
3597 }
3598 }
3599 }
3600
3601 if (size == 0)
3602 goto free_contents_and_exit;
3603 s = *ret = bfd_malloc (size);
3604 if (s == NULL)
3605 goto free_contents_and_exit_err;
3606
3607 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3608
3609 for (i = secsymend; i < opdsymend; ++i)
3610 {
3611 bfd_vma ent;
3612
3613 if (syms[i]->value > opd->size - 8)
3614 continue;
3615
3616 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3617 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3618 {
3619 size_t lo, hi;
3620 size_t len;
3621 asection *sec = abfd->sections;
3622
3623 *s = *syms[i];
3624 lo = codesecsym;
3625 hi = codesecsymend;
3626 while (lo < hi)
3627 {
3628 size_t mid = (lo + hi) >> 1;
3629 if (syms[mid]->section->vma < ent)
3630 lo = mid + 1;
3631 else if (syms[mid]->section->vma > ent)
3632 hi = mid;
3633 else
3634 {
3635 sec = syms[mid]->section;
3636 break;
3637 }
3638 }
3639
3640 if (lo >= hi && lo > codesecsym)
3641 sec = syms[lo - 1]->section;
3642
3643 for (; sec != NULL; sec = sec->next)
3644 {
3645 if (sec->vma > ent)
3646 break;
3647 /* SEC_LOAD may not be set if SEC is from a separate debug
3648 info file. */
3649 if ((sec->flags & SEC_ALLOC) == 0)
3650 break;
3651 if ((sec->flags & SEC_CODE) != 0)
3652 s->section = sec;
3653 }
3654 s->flags |= BSF_SYNTHETIC;
3655 s->value = ent - s->section->vma;
3656 s->name = names;
3657 *names++ = '.';
3658 len = strlen (syms[i]->name);
3659 memcpy (names, syms[i]->name, len + 1);
3660 names += len + 1;
3661 /* Have udata.p point back to the original symbol this
3662 synthetic symbol was derived from. */
3663 s->udata.p = syms[i];
3664 s++;
3665 }
3666 }
3667 free (contents);
3668
3669 if (glink != NULL && relplt != NULL)
3670 {
3671 if (resolv_vma)
3672 {
3673 /* Add a symbol for the main glink trampoline. */
3674 memset (s, 0, sizeof *s);
3675 s->the_bfd = abfd;
3676 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3677 s->section = glink;
3678 s->value = resolv_vma - glink->vma;
3679 s->name = names;
3680 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3681 names += sizeof ("__glink_PLTresolve");
3682 s++;
3683 count++;
3684 }
3685
3686 /* FIXME: It would be very much nicer to put sym@plt on the
3687 stub rather than on the glink branch table entry. The
3688 objdump disassembler would then use a sensible symbol
3689 name on plt calls. The difficulty in doing so is
3690 a) finding the stubs, and,
3691 b) matching stubs against plt entries, and,
3692 c) there can be multiple stubs for a given plt entry.
3693
3694 Solving (a) could be done by code scanning, but older
3695 ppc64 binaries used different stubs to current code.
3696 (b) is the tricky one since you need to known the toc
3697 pointer for at least one function that uses a pic stub to
3698 be able to calculate the plt address referenced.
3699 (c) means gdb would need to set multiple breakpoints (or
3700 find the glink branch itself) when setting breakpoints
3701 for pending shared library loads. */
3702 p = relplt->relocation;
3703 for (i = 0; i < plt_count; i++, p++)
3704 {
3705 size_t len;
3706
3707 *s = **p->sym_ptr_ptr;
3708 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3709 we are defining a symbol, ensure one of them is set. */
3710 if ((s->flags & BSF_LOCAL) == 0)
3711 s->flags |= BSF_GLOBAL;
3712 s->flags |= BSF_SYNTHETIC;
3713 s->section = glink;
3714 s->value = glink_vma - glink->vma;
3715 s->name = names;
3716 s->udata.p = NULL;
3717 len = strlen ((*p->sym_ptr_ptr)->name);
3718 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3719 names += len;
3720 if (p->addend != 0)
3721 {
3722 memcpy (names, "+0x", sizeof ("+0x") - 1);
3723 names += sizeof ("+0x") - 1;
3724 bfd_sprintf_vma (abfd, names, p->addend);
3725 names += strlen (names);
3726 }
3727 memcpy (names, "@plt", sizeof ("@plt"));
3728 names += sizeof ("@plt");
3729 s++;
3730 if (abi < 2)
3731 {
3732 glink_vma += 8;
3733 if (i >= 0x8000)
3734 glink_vma += 4;
3735 }
3736 else
3737 glink_vma += 4;
3738 }
3739 count += plt_count;
3740 }
3741 }
3742
3743 done:
3744 free (syms);
3745 return count;
3746 }
3747 \f
3748 /* The following functions are specific to the ELF linker, while
3749 functions above are used generally. Those named ppc64_elf_* are
3750 called by the main ELF linker code. They appear in this file more
3751 or less in the order in which they are called. eg.
3752 ppc64_elf_check_relocs is called early in the link process,
3753 ppc64_elf_finish_dynamic_sections is one of the last functions
3754 called.
3755
3756 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3757 functions have both a function code symbol and a function descriptor
3758 symbol. A call to foo in a relocatable object file looks like:
3759
3760 . .text
3761 . x:
3762 . bl .foo
3763 . nop
3764
3765 The function definition in another object file might be:
3766
3767 . .section .opd
3768 . foo: .quad .foo
3769 . .quad .TOC.@tocbase
3770 . .quad 0
3771 .
3772 . .text
3773 . .foo: blr
3774
3775 When the linker resolves the call during a static link, the branch
3776 unsurprisingly just goes to .foo and the .opd information is unused.
3777 If the function definition is in a shared library, things are a little
3778 different: The call goes via a plt call stub, the opd information gets
3779 copied to the plt, and the linker patches the nop.
3780
3781 . x:
3782 . bl .foo_stub
3783 . ld 2,40(1)
3784 .
3785 .
3786 . .foo_stub:
3787 . std 2,40(1) # in practice, the call stub
3788 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3789 . addi 11,11,Lfoo@toc@l # this is the general idea
3790 . ld 12,0(11)
3791 . ld 2,8(11)
3792 . mtctr 12
3793 . ld 11,16(11)
3794 . bctr
3795 .
3796 . .section .plt
3797 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3798
3799 The "reloc ()" notation is supposed to indicate that the linker emits
3800 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3801 copying.
3802
3803 What are the difficulties here? Well, firstly, the relocations
3804 examined by the linker in check_relocs are against the function code
3805 sym .foo, while the dynamic relocation in the plt is emitted against
3806 the function descriptor symbol, foo. Somewhere along the line, we need
3807 to carefully copy dynamic link information from one symbol to the other.
3808 Secondly, the generic part of the elf linker will make .foo a dynamic
3809 symbol as is normal for most other backends. We need foo dynamic
3810 instead, at least for an application final link. However, when
3811 creating a shared library containing foo, we need to have both symbols
3812 dynamic so that references to .foo are satisfied during the early
3813 stages of linking. Otherwise the linker might decide to pull in a
3814 definition from some other object, eg. a static library.
3815
3816 Update: As of August 2004, we support a new convention. Function
3817 calls may use the function descriptor symbol, ie. "bl foo". This
3818 behaves exactly as "bl .foo". */
3819
3820 /* Of those relocs that might be copied as dynamic relocs, this
3821 function selects those that must be copied when linking a shared
3822 library or PIE, even when the symbol is local. */
3823
3824 static int
3825 must_be_dyn_reloc (struct bfd_link_info *info,
3826 enum elf_ppc64_reloc_type r_type)
3827 {
3828 switch (r_type)
3829 {
3830 default:
3831 /* Only relative relocs can be resolved when the object load
3832 address isn't fixed. DTPREL64 is excluded because the
3833 dynamic linker needs to differentiate global dynamic from
3834 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3835 return 1;
3836
3837 case R_PPC64_REL32:
3838 case R_PPC64_REL64:
3839 case R_PPC64_REL30:
3840 return 0;
3841
3842 case R_PPC64_TPREL16:
3843 case R_PPC64_TPREL16_LO:
3844 case R_PPC64_TPREL16_HI:
3845 case R_PPC64_TPREL16_HA:
3846 case R_PPC64_TPREL16_DS:
3847 case R_PPC64_TPREL16_LO_DS:
3848 case R_PPC64_TPREL16_HIGH:
3849 case R_PPC64_TPREL16_HIGHA:
3850 case R_PPC64_TPREL16_HIGHER:
3851 case R_PPC64_TPREL16_HIGHERA:
3852 case R_PPC64_TPREL16_HIGHEST:
3853 case R_PPC64_TPREL16_HIGHESTA:
3854 case R_PPC64_TPREL64:
3855 /* These relocations are relative but in a shared library the
3856 linker doesn't know the thread pointer base. */
3857 return bfd_link_dll (info);
3858 }
3859 }
3860
3861 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3862 copying dynamic variables from a shared lib into an app's dynbss
3863 section, and instead use a dynamic relocation to point into the
3864 shared lib. With code that gcc generates, it's vital that this be
3865 enabled; In the PowerPC64 ABI, the address of a function is actually
3866 the address of a function descriptor, which resides in the .opd
3867 section. gcc uses the descriptor directly rather than going via the
3868 GOT as some other ABI's do, which means that initialized function
3869 pointers must reference the descriptor. Thus, a function pointer
3870 initialized to the address of a function in a shared library will
3871 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3872 redefines the function descriptor symbol to point to the copy. This
3873 presents a problem as a plt entry for that function is also
3874 initialized from the function descriptor symbol and the copy reloc
3875 may not be initialized first. */
3876 #define ELIMINATE_COPY_RELOCS 1
3877
3878 /* Section name for stubs is the associated section name plus this
3879 string. */
3880 #define STUB_SUFFIX ".stub"
3881
3882 /* Linker stubs.
3883 ppc_stub_long_branch:
3884 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3885 destination, but a 24 bit branch in a stub section will reach.
3886 . b dest
3887
3888 ppc_stub_plt_branch:
3889 Similar to the above, but a 24 bit branch in the stub section won't
3890 reach its destination.
3891 . addis %r11,%r2,xxx@toc@ha
3892 . ld %r12,xxx@toc@l(%r11)
3893 . mtctr %r12
3894 . bctr
3895
3896 ppc_stub_plt_call:
3897 Used to call a function in a shared library. If it so happens that
3898 the plt entry referenced crosses a 64k boundary, then an extra
3899 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3900 . std %r2,40(%r1)
3901 . addis %r11,%r2,xxx@toc@ha
3902 . ld %r12,xxx+0@toc@l(%r11)
3903 . mtctr %r12
3904 . ld %r2,xxx+8@toc@l(%r11)
3905 . ld %r11,xxx+16@toc@l(%r11)
3906 . bctr
3907
3908 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3909 code to adjust the value and save r2 to support multiple toc sections.
3910 A ppc_stub_long_branch with an r2 offset looks like:
3911 . std %r2,40(%r1)
3912 . addis %r2,%r2,off@ha
3913 . addi %r2,%r2,off@l
3914 . b dest
3915
3916 A ppc_stub_plt_branch with an r2 offset looks like:
3917 . std %r2,40(%r1)
3918 . addis %r11,%r2,xxx@toc@ha
3919 . ld %r12,xxx@toc@l(%r11)
3920 . addis %r2,%r2,off@ha
3921 . addi %r2,%r2,off@l
3922 . mtctr %r12
3923 . bctr
3924
3925 In cases where the "addis" instruction would add zero, the "addis" is
3926 omitted and following instructions modified slightly in some cases.
3927 */
3928
3929 enum ppc_stub_type {
3930 ppc_stub_none,
3931 ppc_stub_long_branch,
3932 ppc_stub_long_branch_r2off,
3933 ppc_stub_plt_branch,
3934 ppc_stub_plt_branch_r2off,
3935 ppc_stub_plt_call,
3936 ppc_stub_plt_call_r2save,
3937 ppc_stub_global_entry,
3938 ppc_stub_save_res
3939 };
3940
3941 /* Information on stub grouping. */
3942 struct map_stub
3943 {
3944 /* The stub section. */
3945 asection *stub_sec;
3946 /* This is the section to which stubs in the group will be attached. */
3947 asection *link_sec;
3948 /* Next group. */
3949 struct map_stub *next;
3950 /* Whether to emit a copy of register save/restore functions in this
3951 group. */
3952 int needs_save_res;
3953 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3954 or -1u if no such stub with bctrl exists. */
3955 unsigned int tls_get_addr_opt_bctrl;
3956 };
3957
3958 struct ppc_stub_hash_entry {
3959
3960 /* Base hash table entry structure. */
3961 struct bfd_hash_entry root;
3962
3963 enum ppc_stub_type stub_type;
3964
3965 /* Group information. */
3966 struct map_stub *group;
3967
3968 /* Offset within stub_sec of the beginning of this stub. */
3969 bfd_vma stub_offset;
3970
3971 /* Given the symbol's value and its section we can determine its final
3972 value when building the stubs (so the stub knows where to jump. */
3973 bfd_vma target_value;
3974 asection *target_section;
3975
3976 /* The symbol table entry, if any, that this was derived from. */
3977 struct ppc_link_hash_entry *h;
3978 struct plt_entry *plt_ent;
3979
3980 /* Symbol st_other. */
3981 unsigned char other;
3982 };
3983
3984 struct ppc_branch_hash_entry {
3985
3986 /* Base hash table entry structure. */
3987 struct bfd_hash_entry root;
3988
3989 /* Offset within branch lookup table. */
3990 unsigned int offset;
3991
3992 /* Generation marker. */
3993 unsigned int iter;
3994 };
3995
3996 /* Used to track dynamic relocations for local symbols. */
3997 struct ppc_dyn_relocs
3998 {
3999 struct ppc_dyn_relocs *next;
4000
4001 /* The input section of the reloc. */
4002 asection *sec;
4003
4004 /* Total number of relocs copied for the input section. */
4005 unsigned int count : 31;
4006
4007 /* Whether this entry is for STT_GNU_IFUNC symbols. */
4008 unsigned int ifunc : 1;
4009 };
4010
4011 struct ppc_link_hash_entry
4012 {
4013 struct elf_link_hash_entry elf;
4014
4015 union {
4016 /* A pointer to the most recently used stub hash entry against this
4017 symbol. */
4018 struct ppc_stub_hash_entry *stub_cache;
4019
4020 /* A pointer to the next symbol starting with a '.' */
4021 struct ppc_link_hash_entry *next_dot_sym;
4022 } u;
4023
4024 /* Track dynamic relocs copied for this symbol. */
4025 struct elf_dyn_relocs *dyn_relocs;
4026
4027 /* Link between function code and descriptor symbols. */
4028 struct ppc_link_hash_entry *oh;
4029
4030 /* Flag function code and descriptor symbols. */
4031 unsigned int is_func:1;
4032 unsigned int is_func_descriptor:1;
4033 unsigned int fake:1;
4034
4035 /* Whether global opd/toc sym has been adjusted or not.
4036 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4037 should be set for all globals defined in any opd/toc section. */
4038 unsigned int adjust_done:1;
4039
4040 /* Set if this is an out-of-line register save/restore function,
4041 with non-standard calling convention. */
4042 unsigned int save_res:1;
4043
4044 /* Set if a duplicate symbol with non-zero localentry is detected,
4045 even when the duplicate symbol does not provide a definition. */
4046 unsigned int non_zero_localentry:1;
4047
4048 /* Contexts in which symbol is used in the GOT (or TOC).
4049 Bits are or'd into the mask as the corresponding relocs are
4050 encountered during check_relocs, with TLS_TLS being set when any
4051 of the other TLS bits are set. tls_optimize clears bits when
4052 optimizing to indicate the corresponding GOT entry type is not
4053 needed. If set, TLS_TLS is never cleared. tls_optimize may also
4054 set TLS_TPRELGD when a GD reloc turns into a TPREL one. We use a
4055 separate flag rather than setting TPREL just for convenience in
4056 distinguishing the two cases.
4057 These flags are also kept for local symbols. */
4058 #define TLS_TLS 1 /* Any TLS reloc. */
4059 #define TLS_GD 2 /* GD reloc. */
4060 #define TLS_LD 4 /* LD reloc. */
4061 #define TLS_TPREL 8 /* TPREL reloc, => IE. */
4062 #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
4063 #define TLS_MARK 32 /* __tls_get_addr call marked. */
4064 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4065 #define TLS_EXPLICIT 128 /* Marks TOC section TLS relocs. */
4066 unsigned char tls_mask;
4067
4068 /* The above field is also used to mark function symbols. In which
4069 case TLS_TLS will be 0. */
4070 #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
4071 #define NON_GOT 256 /* local symbol plt, not stored. */
4072 };
4073
4074 /* ppc64 ELF linker hash table. */
4075
4076 struct ppc_link_hash_table
4077 {
4078 struct elf_link_hash_table elf;
4079
4080 /* The stub hash table. */
4081 struct bfd_hash_table stub_hash_table;
4082
4083 /* Another hash table for plt_branch stubs. */
4084 struct bfd_hash_table branch_hash_table;
4085
4086 /* Hash table for function prologue tocsave. */
4087 htab_t tocsave_htab;
4088
4089 /* Various options and other info passed from the linker. */
4090 struct ppc64_elf_params *params;
4091
4092 /* The size of sec_info below. */
4093 unsigned int sec_info_arr_size;
4094
4095 /* Per-section array of extra section info. Done this way rather
4096 than as part of ppc64_elf_section_data so we have the info for
4097 non-ppc64 sections. */
4098 struct
4099 {
4100 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4101 bfd_vma toc_off;
4102
4103 union
4104 {
4105 /* The section group that this section belongs to. */
4106 struct map_stub *group;
4107 /* A temp section list pointer. */
4108 asection *list;
4109 } u;
4110 } *sec_info;
4111
4112 /* Linked list of groups. */
4113 struct map_stub *group;
4114
4115 /* Temp used when calculating TOC pointers. */
4116 bfd_vma toc_curr;
4117 bfd *toc_bfd;
4118 asection *toc_first_sec;
4119
4120 /* Used when adding symbols. */
4121 struct ppc_link_hash_entry *dot_syms;
4122
4123 /* Shortcuts to get to dynamic linker sections. */
4124 asection *glink;
4125 asection *global_entry;
4126 asection *sfpr;
4127 asection *brlt;
4128 asection *relbrlt;
4129 asection *glink_eh_frame;
4130
4131 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4132 struct ppc_link_hash_entry *tls_get_addr;
4133 struct ppc_link_hash_entry *tls_get_addr_fd;
4134
4135 /* The size of reliplt used by got entry relocs. */
4136 bfd_size_type got_reli_size;
4137
4138 /* Statistics. */
4139 unsigned long stub_count[ppc_stub_global_entry];
4140
4141 /* Number of stubs against global syms. */
4142 unsigned long stub_globals;
4143
4144 /* Set if we're linking code with function descriptors. */
4145 unsigned int opd_abi:1;
4146
4147 /* Support for multiple toc sections. */
4148 unsigned int do_multi_toc:1;
4149 unsigned int multi_toc_needed:1;
4150 unsigned int second_toc_pass:1;
4151 unsigned int do_toc_opt:1;
4152
4153 /* Set if tls optimization is enabled. */
4154 unsigned int do_tls_opt:1;
4155
4156 /* Set on error. */
4157 unsigned int stub_error:1;
4158
4159 /* Whether func_desc_adjust needs to be run over symbols. */
4160 unsigned int need_func_desc_adj:1;
4161
4162 /* Whether there exist local gnu indirect function resolvers,
4163 referenced by dynamic relocations. */
4164 unsigned int local_ifunc_resolver:1;
4165 unsigned int maybe_local_ifunc_resolver:1;
4166
4167 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4168 unsigned int has_plt_localentry0:1;
4169
4170 /* Incremented every time we size stubs. */
4171 unsigned int stub_iteration;
4172
4173 /* Small local sym cache. */
4174 struct sym_cache sym_cache;
4175 };
4176
4177 /* Rename some of the generic section flags to better document how they
4178 are used here. */
4179
4180 /* Nonzero if this section has TLS related relocations. */
4181 #define has_tls_reloc sec_flg0
4182
4183 /* Nonzero if this section has a call to __tls_get_addr. */
4184 #define has_tls_get_addr_call sec_flg1
4185
4186 /* Nonzero if this section has any toc or got relocs. */
4187 #define has_toc_reloc sec_flg2
4188
4189 /* Nonzero if this section has a call to another section that uses
4190 the toc or got. */
4191 #define makes_toc_func_call sec_flg3
4192
4193 /* Recursion protection when determining above flag. */
4194 #define call_check_in_progress sec_flg4
4195 #define call_check_done sec_flg5
4196
4197 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4198
4199 #define ppc_hash_table(p) \
4200 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4201 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4202
4203 #define ppc_stub_hash_lookup(table, string, create, copy) \
4204 ((struct ppc_stub_hash_entry *) \
4205 bfd_hash_lookup ((table), (string), (create), (copy)))
4206
4207 #define ppc_branch_hash_lookup(table, string, create, copy) \
4208 ((struct ppc_branch_hash_entry *) \
4209 bfd_hash_lookup ((table), (string), (create), (copy)))
4210
4211 /* Create an entry in the stub hash table. */
4212
4213 static struct bfd_hash_entry *
4214 stub_hash_newfunc (struct bfd_hash_entry *entry,
4215 struct bfd_hash_table *table,
4216 const char *string)
4217 {
4218 /* Allocate the structure if it has not already been allocated by a
4219 subclass. */
4220 if (entry == NULL)
4221 {
4222 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4223 if (entry == NULL)
4224 return entry;
4225 }
4226
4227 /* Call the allocation method of the superclass. */
4228 entry = bfd_hash_newfunc (entry, table, string);
4229 if (entry != NULL)
4230 {
4231 struct ppc_stub_hash_entry *eh;
4232
4233 /* Initialize the local fields. */
4234 eh = (struct ppc_stub_hash_entry *) entry;
4235 eh->stub_type = ppc_stub_none;
4236 eh->group = NULL;
4237 eh->stub_offset = 0;
4238 eh->target_value = 0;
4239 eh->target_section = NULL;
4240 eh->h = NULL;
4241 eh->plt_ent = NULL;
4242 eh->other = 0;
4243 }
4244
4245 return entry;
4246 }
4247
4248 /* Create an entry in the branch hash table. */
4249
4250 static struct bfd_hash_entry *
4251 branch_hash_newfunc (struct bfd_hash_entry *entry,
4252 struct bfd_hash_table *table,
4253 const char *string)
4254 {
4255 /* Allocate the structure if it has not already been allocated by a
4256 subclass. */
4257 if (entry == NULL)
4258 {
4259 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4260 if (entry == NULL)
4261 return entry;
4262 }
4263
4264 /* Call the allocation method of the superclass. */
4265 entry = bfd_hash_newfunc (entry, table, string);
4266 if (entry != NULL)
4267 {
4268 struct ppc_branch_hash_entry *eh;
4269
4270 /* Initialize the local fields. */
4271 eh = (struct ppc_branch_hash_entry *) entry;
4272 eh->offset = 0;
4273 eh->iter = 0;
4274 }
4275
4276 return entry;
4277 }
4278
4279 /* Create an entry in a ppc64 ELF linker hash table. */
4280
4281 static struct bfd_hash_entry *
4282 link_hash_newfunc (struct bfd_hash_entry *entry,
4283 struct bfd_hash_table *table,
4284 const char *string)
4285 {
4286 /* Allocate the structure if it has not already been allocated by a
4287 subclass. */
4288 if (entry == NULL)
4289 {
4290 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4291 if (entry == NULL)
4292 return entry;
4293 }
4294
4295 /* Call the allocation method of the superclass. */
4296 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4297 if (entry != NULL)
4298 {
4299 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4300
4301 memset (&eh->u.stub_cache, 0,
4302 (sizeof (struct ppc_link_hash_entry)
4303 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4304
4305 /* When making function calls, old ABI code references function entry
4306 points (dot symbols), while new ABI code references the function
4307 descriptor symbol. We need to make any combination of reference and
4308 definition work together, without breaking archive linking.
4309
4310 For a defined function "foo" and an undefined call to "bar":
4311 An old object defines "foo" and ".foo", references ".bar" (possibly
4312 "bar" too).
4313 A new object defines "foo" and references "bar".
4314
4315 A new object thus has no problem with its undefined symbols being
4316 satisfied by definitions in an old object. On the other hand, the
4317 old object won't have ".bar" satisfied by a new object.
4318
4319 Keep a list of newly added dot-symbols. */
4320
4321 if (string[0] == '.')
4322 {
4323 struct ppc_link_hash_table *htab;
4324
4325 htab = (struct ppc_link_hash_table *) table;
4326 eh->u.next_dot_sym = htab->dot_syms;
4327 htab->dot_syms = eh;
4328 }
4329 }
4330
4331 return entry;
4332 }
4333
4334 struct tocsave_entry {
4335 asection *sec;
4336 bfd_vma offset;
4337 };
4338
4339 static hashval_t
4340 tocsave_htab_hash (const void *p)
4341 {
4342 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4343 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4344 }
4345
4346 static int
4347 tocsave_htab_eq (const void *p1, const void *p2)
4348 {
4349 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4350 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4351 return e1->sec == e2->sec && e1->offset == e2->offset;
4352 }
4353
4354 /* Destroy a ppc64 ELF linker hash table. */
4355
4356 static void
4357 ppc64_elf_link_hash_table_free (bfd *obfd)
4358 {
4359 struct ppc_link_hash_table *htab;
4360
4361 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4362 if (htab->tocsave_htab)
4363 htab_delete (htab->tocsave_htab);
4364 bfd_hash_table_free (&htab->branch_hash_table);
4365 bfd_hash_table_free (&htab->stub_hash_table);
4366 _bfd_elf_link_hash_table_free (obfd);
4367 }
4368
4369 /* Create a ppc64 ELF linker hash table. */
4370
4371 static struct bfd_link_hash_table *
4372 ppc64_elf_link_hash_table_create (bfd *abfd)
4373 {
4374 struct ppc_link_hash_table *htab;
4375 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4376
4377 htab = bfd_zmalloc (amt);
4378 if (htab == NULL)
4379 return NULL;
4380
4381 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4382 sizeof (struct ppc_link_hash_entry),
4383 PPC64_ELF_DATA))
4384 {
4385 free (htab);
4386 return NULL;
4387 }
4388
4389 /* Init the stub hash table too. */
4390 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4391 sizeof (struct ppc_stub_hash_entry)))
4392 {
4393 _bfd_elf_link_hash_table_free (abfd);
4394 return NULL;
4395 }
4396
4397 /* And the branch hash table. */
4398 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4399 sizeof (struct ppc_branch_hash_entry)))
4400 {
4401 bfd_hash_table_free (&htab->stub_hash_table);
4402 _bfd_elf_link_hash_table_free (abfd);
4403 return NULL;
4404 }
4405
4406 htab->tocsave_htab = htab_try_create (1024,
4407 tocsave_htab_hash,
4408 tocsave_htab_eq,
4409 NULL);
4410 if (htab->tocsave_htab == NULL)
4411 {
4412 ppc64_elf_link_hash_table_free (abfd);
4413 return NULL;
4414 }
4415 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4416
4417 /* Initializing two fields of the union is just cosmetic. We really
4418 only care about glist, but when compiled on a 32-bit host the
4419 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4420 debugger inspection of these fields look nicer. */
4421 htab->elf.init_got_refcount.refcount = 0;
4422 htab->elf.init_got_refcount.glist = NULL;
4423 htab->elf.init_plt_refcount.refcount = 0;
4424 htab->elf.init_plt_refcount.glist = NULL;
4425 htab->elf.init_got_offset.offset = 0;
4426 htab->elf.init_got_offset.glist = NULL;
4427 htab->elf.init_plt_offset.offset = 0;
4428 htab->elf.init_plt_offset.glist = NULL;
4429
4430 return &htab->elf.root;
4431 }
4432
4433 /* Create sections for linker generated code. */
4434
4435 static bfd_boolean
4436 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4437 {
4438 struct ppc_link_hash_table *htab;
4439 flagword flags;
4440
4441 htab = ppc_hash_table (info);
4442
4443 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4444 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4445 if (htab->params->save_restore_funcs)
4446 {
4447 /* Create .sfpr for code to save and restore fp regs. */
4448 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4449 flags);
4450 if (htab->sfpr == NULL
4451 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4452 return FALSE;
4453 }
4454
4455 if (bfd_link_relocatable (info))
4456 return TRUE;
4457
4458 /* Create .glink for lazy dynamic linking support. */
4459 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4460 flags);
4461 if (htab->glink == NULL
4462 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4463 return FALSE;
4464
4465 /* The part of .glink used by global entry stubs, separate so that
4466 it can be aligned appropriately without affecting htab->glink. */
4467 htab->global_entry = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4468 flags);
4469 if (htab->global_entry == NULL
4470 || ! bfd_set_section_alignment (dynobj, htab->global_entry, 2))
4471 return FALSE;
4472
4473 if (!info->no_ld_generated_unwind_info)
4474 {
4475 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4476 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4477 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4478 ".eh_frame",
4479 flags);
4480 if (htab->glink_eh_frame == NULL
4481 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4482 return FALSE;
4483 }
4484
4485 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4486 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4487 if (htab->elf.iplt == NULL
4488 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4489 return FALSE;
4490
4491 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4492 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4493 htab->elf.irelplt
4494 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4495 if (htab->elf.irelplt == NULL
4496 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4497 return FALSE;
4498
4499 /* Create branch lookup table for plt_branch stubs. */
4500 flags = (SEC_ALLOC | SEC_LOAD
4501 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4502 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4503 flags);
4504 if (htab->brlt == NULL
4505 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4506 return FALSE;
4507
4508 if (!bfd_link_pic (info))
4509 return TRUE;
4510
4511 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4512 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4513 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4514 ".rela.branch_lt",
4515 flags);
4516 if (htab->relbrlt == NULL
4517 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4518 return FALSE;
4519
4520 return TRUE;
4521 }
4522
4523 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4524
4525 bfd_boolean
4526 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4527 struct ppc64_elf_params *params)
4528 {
4529 struct ppc_link_hash_table *htab;
4530
4531 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4532
4533 /* Always hook our dynamic sections into the first bfd, which is the
4534 linker created stub bfd. This ensures that the GOT header is at
4535 the start of the output TOC section. */
4536 htab = ppc_hash_table (info);
4537 htab->elf.dynobj = params->stub_bfd;
4538 htab->params = params;
4539
4540 return create_linkage_sections (htab->elf.dynobj, info);
4541 }
4542
4543 /* Build a name for an entry in the stub hash table. */
4544
4545 static char *
4546 ppc_stub_name (const asection *input_section,
4547 const asection *sym_sec,
4548 const struct ppc_link_hash_entry *h,
4549 const Elf_Internal_Rela *rel)
4550 {
4551 char *stub_name;
4552 ssize_t len;
4553
4554 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4555 offsets from a sym as a branch target? In fact, we could
4556 probably assume the addend is always zero. */
4557 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4558
4559 if (h)
4560 {
4561 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4562 stub_name = bfd_malloc (len);
4563 if (stub_name == NULL)
4564 return stub_name;
4565
4566 len = sprintf (stub_name, "%08x.%s+%x",
4567 input_section->id & 0xffffffff,
4568 h->elf.root.root.string,
4569 (int) rel->r_addend & 0xffffffff);
4570 }
4571 else
4572 {
4573 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4574 stub_name = bfd_malloc (len);
4575 if (stub_name == NULL)
4576 return stub_name;
4577
4578 len = sprintf (stub_name, "%08x.%x:%x+%x",
4579 input_section->id & 0xffffffff,
4580 sym_sec->id & 0xffffffff,
4581 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4582 (int) rel->r_addend & 0xffffffff);
4583 }
4584 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4585 stub_name[len - 2] = 0;
4586 return stub_name;
4587 }
4588
4589 /* Look up an entry in the stub hash. Stub entries are cached because
4590 creating the stub name takes a bit of time. */
4591
4592 static struct ppc_stub_hash_entry *
4593 ppc_get_stub_entry (const asection *input_section,
4594 const asection *sym_sec,
4595 struct ppc_link_hash_entry *h,
4596 const Elf_Internal_Rela *rel,
4597 struct ppc_link_hash_table *htab)
4598 {
4599 struct ppc_stub_hash_entry *stub_entry;
4600 struct map_stub *group;
4601
4602 /* If this input section is part of a group of sections sharing one
4603 stub section, then use the id of the first section in the group.
4604 Stub names need to include a section id, as there may well be
4605 more than one stub used to reach say, printf, and we need to
4606 distinguish between them. */
4607 group = htab->sec_info[input_section->id].u.group;
4608 if (group == NULL)
4609 return NULL;
4610
4611 if (h != NULL && h->u.stub_cache != NULL
4612 && h->u.stub_cache->h == h
4613 && h->u.stub_cache->group == group)
4614 {
4615 stub_entry = h->u.stub_cache;
4616 }
4617 else
4618 {
4619 char *stub_name;
4620
4621 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4622 if (stub_name == NULL)
4623 return NULL;
4624
4625 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4626 stub_name, FALSE, FALSE);
4627 if (h != NULL)
4628 h->u.stub_cache = stub_entry;
4629
4630 free (stub_name);
4631 }
4632
4633 return stub_entry;
4634 }
4635
4636 /* Add a new stub entry to the stub hash. Not all fields of the new
4637 stub entry are initialised. */
4638
4639 static struct ppc_stub_hash_entry *
4640 ppc_add_stub (const char *stub_name,
4641 asection *section,
4642 struct bfd_link_info *info)
4643 {
4644 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4645 struct map_stub *group;
4646 asection *link_sec;
4647 asection *stub_sec;
4648 struct ppc_stub_hash_entry *stub_entry;
4649
4650 group = htab->sec_info[section->id].u.group;
4651 link_sec = group->link_sec;
4652 stub_sec = group->stub_sec;
4653 if (stub_sec == NULL)
4654 {
4655 size_t namelen;
4656 bfd_size_type len;
4657 char *s_name;
4658
4659 namelen = strlen (link_sec->name);
4660 len = namelen + sizeof (STUB_SUFFIX);
4661 s_name = bfd_alloc (htab->params->stub_bfd, len);
4662 if (s_name == NULL)
4663 return NULL;
4664
4665 memcpy (s_name, link_sec->name, namelen);
4666 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4667 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4668 if (stub_sec == NULL)
4669 return NULL;
4670 group->stub_sec = stub_sec;
4671 }
4672
4673 /* Enter this entry into the linker stub hash table. */
4674 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4675 TRUE, FALSE);
4676 if (stub_entry == NULL)
4677 {
4678 /* xgettext:c-format */
4679 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
4680 section->owner, stub_name);
4681 return NULL;
4682 }
4683
4684 stub_entry->group = group;
4685 stub_entry->stub_offset = 0;
4686 return stub_entry;
4687 }
4688
4689 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4690 not already done. */
4691
4692 static bfd_boolean
4693 create_got_section (bfd *abfd, struct bfd_link_info *info)
4694 {
4695 asection *got, *relgot;
4696 flagword flags;
4697 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4698
4699 if (!is_ppc64_elf (abfd))
4700 return FALSE;
4701 if (htab == NULL)
4702 return FALSE;
4703
4704 if (!htab->elf.sgot
4705 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4706 return FALSE;
4707
4708 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4709 | SEC_LINKER_CREATED);
4710
4711 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4712 if (!got
4713 || !bfd_set_section_alignment (abfd, got, 3))
4714 return FALSE;
4715
4716 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4717 flags | SEC_READONLY);
4718 if (!relgot
4719 || ! bfd_set_section_alignment (abfd, relgot, 3))
4720 return FALSE;
4721
4722 ppc64_elf_tdata (abfd)->got = got;
4723 ppc64_elf_tdata (abfd)->relgot = relgot;
4724 return TRUE;
4725 }
4726
4727 /* Follow indirect and warning symbol links. */
4728
4729 static inline struct bfd_link_hash_entry *
4730 follow_link (struct bfd_link_hash_entry *h)
4731 {
4732 while (h->type == bfd_link_hash_indirect
4733 || h->type == bfd_link_hash_warning)
4734 h = h->u.i.link;
4735 return h;
4736 }
4737
4738 static inline struct elf_link_hash_entry *
4739 elf_follow_link (struct elf_link_hash_entry *h)
4740 {
4741 return (struct elf_link_hash_entry *) follow_link (&h->root);
4742 }
4743
4744 static inline struct ppc_link_hash_entry *
4745 ppc_follow_link (struct ppc_link_hash_entry *h)
4746 {
4747 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4748 }
4749
4750 /* Merge PLT info on FROM with that on TO. */
4751
4752 static void
4753 move_plt_plist (struct ppc_link_hash_entry *from,
4754 struct ppc_link_hash_entry *to)
4755 {
4756 if (from->elf.plt.plist != NULL)
4757 {
4758 if (to->elf.plt.plist != NULL)
4759 {
4760 struct plt_entry **entp;
4761 struct plt_entry *ent;
4762
4763 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4764 {
4765 struct plt_entry *dent;
4766
4767 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4768 if (dent->addend == ent->addend)
4769 {
4770 dent->plt.refcount += ent->plt.refcount;
4771 *entp = ent->next;
4772 break;
4773 }
4774 if (dent == NULL)
4775 entp = &ent->next;
4776 }
4777 *entp = to->elf.plt.plist;
4778 }
4779
4780 to->elf.plt.plist = from->elf.plt.plist;
4781 from->elf.plt.plist = NULL;
4782 }
4783 }
4784
4785 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4786
4787 static void
4788 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4789 struct elf_link_hash_entry *dir,
4790 struct elf_link_hash_entry *ind)
4791 {
4792 struct ppc_link_hash_entry *edir, *eind;
4793
4794 edir = (struct ppc_link_hash_entry *) dir;
4795 eind = (struct ppc_link_hash_entry *) ind;
4796
4797 edir->is_func |= eind->is_func;
4798 edir->is_func_descriptor |= eind->is_func_descriptor;
4799 edir->tls_mask |= eind->tls_mask;
4800 if (eind->oh != NULL)
4801 edir->oh = ppc_follow_link (eind->oh);
4802
4803 if (edir->elf.versioned != versioned_hidden)
4804 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4805 edir->elf.ref_regular |= eind->elf.ref_regular;
4806 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4807 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4808 edir->elf.needs_plt |= eind->elf.needs_plt;
4809 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4810
4811 /* If we were called to copy over info for a weak sym, don't copy
4812 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4813 in order to simplify readonly_dynrelocs and save a field in the
4814 symbol hash entry, but that means dyn_relocs can't be used in any
4815 tests about a specific symbol, or affect other symbol flags which
4816 are then tested. */
4817 if (eind->elf.root.type != bfd_link_hash_indirect)
4818 return;
4819
4820 /* Copy over any dynamic relocs we may have on the indirect sym. */
4821 if (eind->dyn_relocs != NULL)
4822 {
4823 if (edir->dyn_relocs != NULL)
4824 {
4825 struct elf_dyn_relocs **pp;
4826 struct elf_dyn_relocs *p;
4827
4828 /* Add reloc counts against the indirect sym to the direct sym
4829 list. Merge any entries against the same section. */
4830 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4831 {
4832 struct elf_dyn_relocs *q;
4833
4834 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4835 if (q->sec == p->sec)
4836 {
4837 q->pc_count += p->pc_count;
4838 q->count += p->count;
4839 *pp = p->next;
4840 break;
4841 }
4842 if (q == NULL)
4843 pp = &p->next;
4844 }
4845 *pp = edir->dyn_relocs;
4846 }
4847
4848 edir->dyn_relocs = eind->dyn_relocs;
4849 eind->dyn_relocs = NULL;
4850 }
4851
4852 /* Copy over got entries that we may have already seen to the
4853 symbol which just became indirect. */
4854 if (eind->elf.got.glist != NULL)
4855 {
4856 if (edir->elf.got.glist != NULL)
4857 {
4858 struct got_entry **entp;
4859 struct got_entry *ent;
4860
4861 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4862 {
4863 struct got_entry *dent;
4864
4865 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4866 if (dent->addend == ent->addend
4867 && dent->owner == ent->owner
4868 && dent->tls_type == ent->tls_type)
4869 {
4870 dent->got.refcount += ent->got.refcount;
4871 *entp = ent->next;
4872 break;
4873 }
4874 if (dent == NULL)
4875 entp = &ent->next;
4876 }
4877 *entp = edir->elf.got.glist;
4878 }
4879
4880 edir->elf.got.glist = eind->elf.got.glist;
4881 eind->elf.got.glist = NULL;
4882 }
4883
4884 /* And plt entries. */
4885 move_plt_plist (eind, edir);
4886
4887 if (eind->elf.dynindx != -1)
4888 {
4889 if (edir->elf.dynindx != -1)
4890 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4891 edir->elf.dynstr_index);
4892 edir->elf.dynindx = eind->elf.dynindx;
4893 edir->elf.dynstr_index = eind->elf.dynstr_index;
4894 eind->elf.dynindx = -1;
4895 eind->elf.dynstr_index = 0;
4896 }
4897 }
4898
4899 /* Find the function descriptor hash entry from the given function code
4900 hash entry FH. Link the entries via their OH fields. */
4901
4902 static struct ppc_link_hash_entry *
4903 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4904 {
4905 struct ppc_link_hash_entry *fdh = fh->oh;
4906
4907 if (fdh == NULL)
4908 {
4909 const char *fd_name = fh->elf.root.root.string + 1;
4910
4911 fdh = (struct ppc_link_hash_entry *)
4912 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4913 if (fdh == NULL)
4914 return fdh;
4915
4916 fdh->is_func_descriptor = 1;
4917 fdh->oh = fh;
4918 fh->is_func = 1;
4919 fh->oh = fdh;
4920 }
4921
4922 fdh = ppc_follow_link (fdh);
4923 fdh->is_func_descriptor = 1;
4924 fdh->oh = fh;
4925 return fdh;
4926 }
4927
4928 /* Make a fake function descriptor sym for the undefined code sym FH. */
4929
4930 static struct ppc_link_hash_entry *
4931 make_fdh (struct bfd_link_info *info,
4932 struct ppc_link_hash_entry *fh)
4933 {
4934 bfd *abfd = fh->elf.root.u.undef.abfd;
4935 struct bfd_link_hash_entry *bh = NULL;
4936 struct ppc_link_hash_entry *fdh;
4937 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4938 ? BSF_WEAK
4939 : BSF_GLOBAL);
4940
4941 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4942 fh->elf.root.root.string + 1,
4943 flags, bfd_und_section_ptr, 0,
4944 NULL, FALSE, FALSE, &bh))
4945 return NULL;
4946
4947 fdh = (struct ppc_link_hash_entry *) bh;
4948 fdh->elf.non_elf = 0;
4949 fdh->fake = 1;
4950 fdh->is_func_descriptor = 1;
4951 fdh->oh = fh;
4952 fh->is_func = 1;
4953 fh->oh = fdh;
4954 return fdh;
4955 }
4956
4957 /* Fix function descriptor symbols defined in .opd sections to be
4958 function type. */
4959
4960 static bfd_boolean
4961 ppc64_elf_add_symbol_hook (bfd *ibfd,
4962 struct bfd_link_info *info,
4963 Elf_Internal_Sym *isym,
4964 const char **name,
4965 flagword *flags ATTRIBUTE_UNUSED,
4966 asection **sec,
4967 bfd_vma *value)
4968 {
4969 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4970 && (ibfd->flags & DYNAMIC) == 0
4971 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4972 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4973
4974 if (*sec != NULL
4975 && strcmp ((*sec)->name, ".opd") == 0)
4976 {
4977 asection *code_sec;
4978
4979 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4980 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4981 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4982
4983 /* If the symbol is a function defined in .opd, and the function
4984 code is in a discarded group, let it appear to be undefined. */
4985 if (!bfd_link_relocatable (info)
4986 && (*sec)->reloc_count != 0
4987 && opd_entry_value (*sec, *value, &code_sec, NULL,
4988 FALSE) != (bfd_vma) -1
4989 && discarded_section (code_sec))
4990 {
4991 *sec = bfd_und_section_ptr;
4992 isym->st_shndx = SHN_UNDEF;
4993 }
4994 }
4995 else if (*sec != NULL
4996 && strcmp ((*sec)->name, ".toc") == 0
4997 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4998 {
4999 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5000 if (htab != NULL)
5001 htab->params->object_in_toc = 1;
5002 }
5003
5004 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5005 {
5006 if (abiversion (ibfd) == 0)
5007 set_abiversion (ibfd, 2);
5008 else if (abiversion (ibfd) == 1)
5009 {
5010 _bfd_error_handler (_("symbol '%s' has invalid st_other"
5011 " for ABI version 1"), *name);
5012 bfd_set_error (bfd_error_bad_value);
5013 return FALSE;
5014 }
5015 }
5016
5017 return TRUE;
5018 }
5019
5020 /* Merge non-visibility st_other attributes: local entry point. */
5021
5022 static void
5023 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5024 const Elf_Internal_Sym *isym,
5025 bfd_boolean definition,
5026 bfd_boolean dynamic)
5027 {
5028 if (definition && (!dynamic || !h->def_regular))
5029 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5030 | ELF_ST_VISIBILITY (h->other));
5031 }
5032
5033 /* Hook called on merging a symbol. We use this to clear "fake" since
5034 we now have a real symbol. */
5035
5036 static bfd_boolean
5037 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5038 const Elf_Internal_Sym *isym,
5039 asection **psec ATTRIBUTE_UNUSED,
5040 bfd_boolean newdef ATTRIBUTE_UNUSED,
5041 bfd_boolean olddef ATTRIBUTE_UNUSED,
5042 bfd *oldbfd ATTRIBUTE_UNUSED,
5043 const asection *oldsec ATTRIBUTE_UNUSED)
5044 {
5045 ((struct ppc_link_hash_entry *) h)->fake = 0;
5046 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5047 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5048 return TRUE;
5049 }
5050
5051 /* This function makes an old ABI object reference to ".bar" cause the
5052 inclusion of a new ABI object archive that defines "bar".
5053 NAME is a symbol defined in an archive. Return a symbol in the hash
5054 table that might be satisfied by the archive symbols. */
5055
5056 static struct elf_link_hash_entry *
5057 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5058 struct bfd_link_info *info,
5059 const char *name)
5060 {
5061 struct elf_link_hash_entry *h;
5062 char *dot_name;
5063 size_t len;
5064
5065 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5066 if (h != NULL
5067 /* Don't return this sym if it is a fake function descriptor
5068 created by add_symbol_adjust. */
5069 && !((struct ppc_link_hash_entry *) h)->fake)
5070 return h;
5071
5072 if (name[0] == '.')
5073 return h;
5074
5075 len = strlen (name);
5076 dot_name = bfd_alloc (abfd, len + 2);
5077 if (dot_name == NULL)
5078 return (struct elf_link_hash_entry *) -1;
5079 dot_name[0] = '.';
5080 memcpy (dot_name + 1, name, len + 1);
5081 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5082 bfd_release (abfd, dot_name);
5083 return h;
5084 }
5085
5086 /* This function satisfies all old ABI object references to ".bar" if a
5087 new ABI object defines "bar". Well, at least, undefined dot symbols
5088 are made weak. This stops later archive searches from including an
5089 object if we already have a function descriptor definition. It also
5090 prevents the linker complaining about undefined symbols.
5091 We also check and correct mismatched symbol visibility here. The
5092 most restrictive visibility of the function descriptor and the
5093 function entry symbol is used. */
5094
5095 static bfd_boolean
5096 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5097 {
5098 struct ppc_link_hash_table *htab;
5099 struct ppc_link_hash_entry *fdh;
5100
5101 if (eh->elf.root.type == bfd_link_hash_warning)
5102 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5103
5104 if (eh->elf.root.type == bfd_link_hash_indirect)
5105 return TRUE;
5106
5107 if (eh->elf.root.root.string[0] != '.')
5108 abort ();
5109
5110 htab = ppc_hash_table (info);
5111 if (htab == NULL)
5112 return FALSE;
5113
5114 fdh = lookup_fdh (eh, htab);
5115 if (fdh == NULL
5116 && !bfd_link_relocatable (info)
5117 && (eh->elf.root.type == bfd_link_hash_undefined
5118 || eh->elf.root.type == bfd_link_hash_undefweak)
5119 && eh->elf.ref_regular)
5120 {
5121 /* Make an undefined function descriptor sym, in order to
5122 pull in an --as-needed shared lib. Archives are handled
5123 elsewhere. */
5124 fdh = make_fdh (info, eh);
5125 if (fdh == NULL)
5126 return FALSE;
5127 }
5128
5129 if (fdh != NULL)
5130 {
5131 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5132 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5133
5134 /* Make both descriptor and entry symbol have the most
5135 constraining visibility of either symbol. */
5136 if (entry_vis < descr_vis)
5137 fdh->elf.other += entry_vis - descr_vis;
5138 else if (entry_vis > descr_vis)
5139 eh->elf.other += descr_vis - entry_vis;
5140
5141 /* Propagate reference flags from entry symbol to function
5142 descriptor symbol. */
5143 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5144 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5145 fdh->elf.ref_regular |= eh->elf.ref_regular;
5146 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5147
5148 if (!fdh->elf.forced_local
5149 && fdh->elf.dynindx == -1
5150 && fdh->elf.versioned != versioned_hidden
5151 && (bfd_link_dll (info)
5152 || fdh->elf.def_dynamic
5153 || fdh->elf.ref_dynamic)
5154 && (eh->elf.ref_regular
5155 || eh->elf.def_regular))
5156 {
5157 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5158 return FALSE;
5159 }
5160 }
5161
5162 return TRUE;
5163 }
5164
5165 /* Set up opd section info and abiversion for IBFD, and process list
5166 of dot-symbols we made in link_hash_newfunc. */
5167
5168 static bfd_boolean
5169 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5170 {
5171 struct ppc_link_hash_table *htab;
5172 struct ppc_link_hash_entry **p, *eh;
5173 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5174
5175 if (opd != NULL && opd->size != 0)
5176 {
5177 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5178 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5179
5180 if (abiversion (ibfd) == 0)
5181 set_abiversion (ibfd, 1);
5182 else if (abiversion (ibfd) >= 2)
5183 {
5184 /* xgettext:c-format */
5185 _bfd_error_handler (_("%pB .opd not allowed in ABI version %d"),
5186 ibfd, abiversion (ibfd));
5187 bfd_set_error (bfd_error_bad_value);
5188 return FALSE;
5189 }
5190 }
5191
5192 if (is_ppc64_elf (info->output_bfd))
5193 {
5194 /* For input files without an explicit abiversion in e_flags
5195 we should have flagged any with symbol st_other bits set
5196 as ELFv1 and above flagged those with .opd as ELFv2.
5197 Set the output abiversion if not yet set, and for any input
5198 still ambiguous, take its abiversion from the output.
5199 Differences in ABI are reported later. */
5200 if (abiversion (info->output_bfd) == 0)
5201 set_abiversion (info->output_bfd, abiversion (ibfd));
5202 else if (abiversion (ibfd) == 0)
5203 set_abiversion (ibfd, abiversion (info->output_bfd));
5204 }
5205
5206 htab = ppc_hash_table (info);
5207 if (htab == NULL)
5208 return TRUE;
5209
5210 if (opd != NULL && opd->size != 0
5211 && (ibfd->flags & DYNAMIC) == 0
5212 && (opd->flags & SEC_RELOC) != 0
5213 && opd->reloc_count != 0
5214 && !bfd_is_abs_section (opd->output_section)
5215 && info->gc_sections)
5216 {
5217 /* Garbage collection needs some extra help with .opd sections.
5218 We don't want to necessarily keep everything referenced by
5219 relocs in .opd, as that would keep all functions. Instead,
5220 if we reference an .opd symbol (a function descriptor), we
5221 want to keep the function code symbol's section. This is
5222 easy for global symbols, but for local syms we need to keep
5223 information about the associated function section. */
5224 bfd_size_type amt;
5225 asection **opd_sym_map;
5226 Elf_Internal_Shdr *symtab_hdr;
5227 Elf_Internal_Rela *relocs, *rel_end, *rel;
5228
5229 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5230 opd_sym_map = bfd_zalloc (ibfd, amt);
5231 if (opd_sym_map == NULL)
5232 return FALSE;
5233 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5234 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5235 info->keep_memory);
5236 if (relocs == NULL)
5237 return FALSE;
5238 symtab_hdr = &elf_symtab_hdr (ibfd);
5239 rel_end = relocs + opd->reloc_count - 1;
5240 for (rel = relocs; rel < rel_end; rel++)
5241 {
5242 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5243 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5244
5245 if (r_type == R_PPC64_ADDR64
5246 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5247 && r_symndx < symtab_hdr->sh_info)
5248 {
5249 Elf_Internal_Sym *isym;
5250 asection *s;
5251
5252 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5253 if (isym == NULL)
5254 {
5255 if (elf_section_data (opd)->relocs != relocs)
5256 free (relocs);
5257 return FALSE;
5258 }
5259
5260 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5261 if (s != NULL && s != opd)
5262 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5263 }
5264 }
5265 if (elf_section_data (opd)->relocs != relocs)
5266 free (relocs);
5267 }
5268
5269 p = &htab->dot_syms;
5270 while ((eh = *p) != NULL)
5271 {
5272 *p = NULL;
5273 if (&eh->elf == htab->elf.hgot)
5274 ;
5275 else if (htab->elf.hgot == NULL
5276 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5277 htab->elf.hgot = &eh->elf;
5278 else if (abiversion (ibfd) <= 1)
5279 {
5280 htab->need_func_desc_adj = 1;
5281 if (!add_symbol_adjust (eh, info))
5282 return FALSE;
5283 }
5284 p = &eh->u.next_dot_sym;
5285 }
5286 return TRUE;
5287 }
5288
5289 /* Undo hash table changes when an --as-needed input file is determined
5290 not to be needed. */
5291
5292 static bfd_boolean
5293 ppc64_elf_notice_as_needed (bfd *ibfd,
5294 struct bfd_link_info *info,
5295 enum notice_asneeded_action act)
5296 {
5297 if (act == notice_not_needed)
5298 {
5299 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5300
5301 if (htab == NULL)
5302 return FALSE;
5303
5304 htab->dot_syms = NULL;
5305 }
5306 return _bfd_elf_notice_as_needed (ibfd, info, act);
5307 }
5308
5309 /* If --just-symbols against a final linked binary, then assume we need
5310 toc adjusting stubs when calling functions defined there. */
5311
5312 static void
5313 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5314 {
5315 if ((sec->flags & SEC_CODE) != 0
5316 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5317 && is_ppc64_elf (sec->owner))
5318 {
5319 if (abiversion (sec->owner) >= 2
5320 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5321 sec->has_toc_reloc = 1;
5322 }
5323 _bfd_elf_link_just_syms (sec, info);
5324 }
5325
5326 static struct plt_entry **
5327 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5328 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5329 {
5330 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5331 struct plt_entry **local_plt;
5332 unsigned char *local_got_tls_masks;
5333
5334 if (local_got_ents == NULL)
5335 {
5336 bfd_size_type size = symtab_hdr->sh_info;
5337
5338 size *= (sizeof (*local_got_ents)
5339 + sizeof (*local_plt)
5340 + sizeof (*local_got_tls_masks));
5341 local_got_ents = bfd_zalloc (abfd, size);
5342 if (local_got_ents == NULL)
5343 return NULL;
5344 elf_local_got_ents (abfd) = local_got_ents;
5345 }
5346
5347 if ((tls_type & (NON_GOT | TLS_EXPLICIT)) == 0)
5348 {
5349 struct got_entry *ent;
5350
5351 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5352 if (ent->addend == r_addend
5353 && ent->owner == abfd
5354 && ent->tls_type == tls_type)
5355 break;
5356 if (ent == NULL)
5357 {
5358 bfd_size_type amt = sizeof (*ent);
5359 ent = bfd_alloc (abfd, amt);
5360 if (ent == NULL)
5361 return FALSE;
5362 ent->next = local_got_ents[r_symndx];
5363 ent->addend = r_addend;
5364 ent->owner = abfd;
5365 ent->tls_type = tls_type;
5366 ent->is_indirect = FALSE;
5367 ent->got.refcount = 0;
5368 local_got_ents[r_symndx] = ent;
5369 }
5370 ent->got.refcount += 1;
5371 }
5372
5373 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5374 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5375 local_got_tls_masks[r_symndx] |= tls_type & 0xff;
5376
5377 return local_plt + r_symndx;
5378 }
5379
5380 static bfd_boolean
5381 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5382 {
5383 struct plt_entry *ent;
5384
5385 for (ent = *plist; ent != NULL; ent = ent->next)
5386 if (ent->addend == addend)
5387 break;
5388 if (ent == NULL)
5389 {
5390 bfd_size_type amt = sizeof (*ent);
5391 ent = bfd_alloc (abfd, amt);
5392 if (ent == NULL)
5393 return FALSE;
5394 ent->next = *plist;
5395 ent->addend = addend;
5396 ent->plt.refcount = 0;
5397 *plist = ent;
5398 }
5399 ent->plt.refcount += 1;
5400 return TRUE;
5401 }
5402
5403 static bfd_boolean
5404 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5405 {
5406 return (r_type == R_PPC64_REL24
5407 || r_type == R_PPC64_REL14
5408 || r_type == R_PPC64_REL14_BRTAKEN
5409 || r_type == R_PPC64_REL14_BRNTAKEN
5410 || r_type == R_PPC64_ADDR24
5411 || r_type == R_PPC64_ADDR14
5412 || r_type == R_PPC64_ADDR14_BRTAKEN
5413 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5414 }
5415
5416 /* Look through the relocs for a section during the first phase, and
5417 calculate needed space in the global offset table, procedure
5418 linkage table, and dynamic reloc sections. */
5419
5420 static bfd_boolean
5421 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5422 asection *sec, const Elf_Internal_Rela *relocs)
5423 {
5424 struct ppc_link_hash_table *htab;
5425 Elf_Internal_Shdr *symtab_hdr;
5426 struct elf_link_hash_entry **sym_hashes;
5427 const Elf_Internal_Rela *rel;
5428 const Elf_Internal_Rela *rel_end;
5429 asection *sreloc;
5430 struct elf_link_hash_entry *tga, *dottga;
5431 bfd_boolean is_opd;
5432
5433 if (bfd_link_relocatable (info))
5434 return TRUE;
5435
5436 /* Don't do anything special with non-loaded, non-alloced sections.
5437 In particular, any relocs in such sections should not affect GOT
5438 and PLT reference counting (ie. we don't allow them to create GOT
5439 or PLT entries), there's no possibility or desire to optimize TLS
5440 relocs, and there's not much point in propagating relocs to shared
5441 libs that the dynamic linker won't relocate. */
5442 if ((sec->flags & SEC_ALLOC) == 0)
5443 return TRUE;
5444
5445 BFD_ASSERT (is_ppc64_elf (abfd));
5446
5447 htab = ppc_hash_table (info);
5448 if (htab == NULL)
5449 return FALSE;
5450
5451 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5452 FALSE, FALSE, TRUE);
5453 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5454 FALSE, FALSE, TRUE);
5455 symtab_hdr = &elf_symtab_hdr (abfd);
5456 sym_hashes = elf_sym_hashes (abfd);
5457 sreloc = NULL;
5458 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5459 rel_end = relocs + sec->reloc_count;
5460 for (rel = relocs; rel < rel_end; rel++)
5461 {
5462 unsigned long r_symndx;
5463 struct elf_link_hash_entry *h;
5464 enum elf_ppc64_reloc_type r_type;
5465 int tls_type;
5466 struct _ppc64_elf_section_data *ppc64_sec;
5467 struct plt_entry **ifunc, **plt_list;
5468
5469 r_symndx = ELF64_R_SYM (rel->r_info);
5470 if (r_symndx < symtab_hdr->sh_info)
5471 h = NULL;
5472 else
5473 {
5474 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5475 h = elf_follow_link (h);
5476
5477 if (h == htab->elf.hgot)
5478 sec->has_toc_reloc = 1;
5479 }
5480
5481 tls_type = 0;
5482 ifunc = NULL;
5483 if (h != NULL)
5484 {
5485 if (h->type == STT_GNU_IFUNC)
5486 {
5487 h->needs_plt = 1;
5488 ifunc = &h->plt.plist;
5489 }
5490 }
5491 else
5492 {
5493 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5494 abfd, r_symndx);
5495 if (isym == NULL)
5496 return FALSE;
5497
5498 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5499 {
5500 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5501 rel->r_addend,
5502 NON_GOT | PLT_IFUNC);
5503 if (ifunc == NULL)
5504 return FALSE;
5505 }
5506 }
5507
5508 r_type = ELF64_R_TYPE (rel->r_info);
5509 switch (r_type)
5510 {
5511 case R_PPC64_TLSGD:
5512 case R_PPC64_TLSLD:
5513 /* These special tls relocs tie a call to __tls_get_addr with
5514 its parameter symbol. */
5515 if (h != NULL)
5516 ((struct ppc_link_hash_entry *) h)->tls_mask |= TLS_TLS | TLS_MARK;
5517 else
5518 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5519 rel->r_addend,
5520 NON_GOT | TLS_TLS | TLS_MARK))
5521 return FALSE;
5522 sec->has_tls_reloc = 1;
5523 break;
5524
5525 case R_PPC64_GOT_TLSLD16:
5526 case R_PPC64_GOT_TLSLD16_LO:
5527 case R_PPC64_GOT_TLSLD16_HI:
5528 case R_PPC64_GOT_TLSLD16_HA:
5529 tls_type = TLS_TLS | TLS_LD;
5530 goto dogottls;
5531
5532 case R_PPC64_GOT_TLSGD16:
5533 case R_PPC64_GOT_TLSGD16_LO:
5534 case R_PPC64_GOT_TLSGD16_HI:
5535 case R_PPC64_GOT_TLSGD16_HA:
5536 tls_type = TLS_TLS | TLS_GD;
5537 goto dogottls;
5538
5539 case R_PPC64_GOT_TPREL16_DS:
5540 case R_PPC64_GOT_TPREL16_LO_DS:
5541 case R_PPC64_GOT_TPREL16_HI:
5542 case R_PPC64_GOT_TPREL16_HA:
5543 if (bfd_link_dll (info))
5544 info->flags |= DF_STATIC_TLS;
5545 tls_type = TLS_TLS | TLS_TPREL;
5546 goto dogottls;
5547
5548 case R_PPC64_GOT_DTPREL16_DS:
5549 case R_PPC64_GOT_DTPREL16_LO_DS:
5550 case R_PPC64_GOT_DTPREL16_HI:
5551 case R_PPC64_GOT_DTPREL16_HA:
5552 tls_type = TLS_TLS | TLS_DTPREL;
5553 dogottls:
5554 sec->has_tls_reloc = 1;
5555 /* Fall through */
5556
5557 case R_PPC64_GOT16:
5558 case R_PPC64_GOT16_DS:
5559 case R_PPC64_GOT16_HA:
5560 case R_PPC64_GOT16_HI:
5561 case R_PPC64_GOT16_LO:
5562 case R_PPC64_GOT16_LO_DS:
5563 /* This symbol requires a global offset table entry. */
5564 sec->has_toc_reloc = 1;
5565 if (r_type == R_PPC64_GOT_TLSLD16
5566 || r_type == R_PPC64_GOT_TLSGD16
5567 || r_type == R_PPC64_GOT_TPREL16_DS
5568 || r_type == R_PPC64_GOT_DTPREL16_DS
5569 || r_type == R_PPC64_GOT16
5570 || r_type == R_PPC64_GOT16_DS)
5571 {
5572 htab->do_multi_toc = 1;
5573 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5574 }
5575
5576 if (ppc64_elf_tdata (abfd)->got == NULL
5577 && !create_got_section (abfd, info))
5578 return FALSE;
5579
5580 if (h != NULL)
5581 {
5582 struct ppc_link_hash_entry *eh;
5583 struct got_entry *ent;
5584
5585 eh = (struct ppc_link_hash_entry *) h;
5586 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5587 if (ent->addend == rel->r_addend
5588 && ent->owner == abfd
5589 && ent->tls_type == tls_type)
5590 break;
5591 if (ent == NULL)
5592 {
5593 bfd_size_type amt = sizeof (*ent);
5594 ent = bfd_alloc (abfd, amt);
5595 if (ent == NULL)
5596 return FALSE;
5597 ent->next = eh->elf.got.glist;
5598 ent->addend = rel->r_addend;
5599 ent->owner = abfd;
5600 ent->tls_type = tls_type;
5601 ent->is_indirect = FALSE;
5602 ent->got.refcount = 0;
5603 eh->elf.got.glist = ent;
5604 }
5605 ent->got.refcount += 1;
5606 eh->tls_mask |= tls_type;
5607 }
5608 else
5609 /* This is a global offset table entry for a local symbol. */
5610 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5611 rel->r_addend, tls_type))
5612 return FALSE;
5613
5614 /* We may also need a plt entry if the symbol turns out to be
5615 an ifunc. */
5616 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5617 {
5618 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5619 return FALSE;
5620 }
5621 break;
5622
5623 case R_PPC64_PLT16_HA:
5624 case R_PPC64_PLT16_HI:
5625 case R_PPC64_PLT16_LO:
5626 case R_PPC64_PLT32:
5627 case R_PPC64_PLT64:
5628 /* This symbol requires a procedure linkage table entry. */
5629 plt_list = ifunc;
5630 if (h != NULL)
5631 {
5632 h->needs_plt = 1;
5633 if (h->root.root.string[0] == '.'
5634 && h->root.root.string[1] != '\0')
5635 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5636 plt_list = &h->plt.plist;
5637 }
5638 if (plt_list == NULL)
5639 {
5640 /* It does not make sense to have a procedure linkage
5641 table entry for a non-ifunc local symbol. */
5642 info->callbacks->einfo
5643 /* xgettext:c-format */
5644 (_("%H: %s reloc against local symbol\n"),
5645 abfd, sec, rel->r_offset,
5646 ppc64_elf_howto_table[r_type]->name);
5647 bfd_set_error (bfd_error_bad_value);
5648 return FALSE;
5649 }
5650 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5651 return FALSE;
5652 break;
5653
5654 /* The following relocations don't need to propagate the
5655 relocation if linking a shared object since they are
5656 section relative. */
5657 case R_PPC64_SECTOFF:
5658 case R_PPC64_SECTOFF_LO:
5659 case R_PPC64_SECTOFF_HI:
5660 case R_PPC64_SECTOFF_HA:
5661 case R_PPC64_SECTOFF_DS:
5662 case R_PPC64_SECTOFF_LO_DS:
5663 case R_PPC64_DTPREL16:
5664 case R_PPC64_DTPREL16_LO:
5665 case R_PPC64_DTPREL16_HI:
5666 case R_PPC64_DTPREL16_HA:
5667 case R_PPC64_DTPREL16_DS:
5668 case R_PPC64_DTPREL16_LO_DS:
5669 case R_PPC64_DTPREL16_HIGH:
5670 case R_PPC64_DTPREL16_HIGHA:
5671 case R_PPC64_DTPREL16_HIGHER:
5672 case R_PPC64_DTPREL16_HIGHERA:
5673 case R_PPC64_DTPREL16_HIGHEST:
5674 case R_PPC64_DTPREL16_HIGHESTA:
5675 break;
5676
5677 /* Nor do these. */
5678 case R_PPC64_REL16:
5679 case R_PPC64_REL16_LO:
5680 case R_PPC64_REL16_HI:
5681 case R_PPC64_REL16_HA:
5682 case R_PPC64_REL16DX_HA:
5683 break;
5684
5685 /* Not supported as a dynamic relocation. */
5686 case R_PPC64_ADDR64_LOCAL:
5687 if (bfd_link_pic (info))
5688 {
5689 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5690 ppc_howto_init ();
5691 /* xgettext:c-format */
5692 info->callbacks->einfo (_("%H: %s reloc unsupported "
5693 "in shared libraries and PIEs\n"),
5694 abfd, sec, rel->r_offset,
5695 ppc64_elf_howto_table[r_type]->name);
5696 bfd_set_error (bfd_error_bad_value);
5697 return FALSE;
5698 }
5699 break;
5700
5701 case R_PPC64_TOC16:
5702 case R_PPC64_TOC16_DS:
5703 htab->do_multi_toc = 1;
5704 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5705 /* Fall through. */
5706 case R_PPC64_TOC16_LO:
5707 case R_PPC64_TOC16_HI:
5708 case R_PPC64_TOC16_HA:
5709 case R_PPC64_TOC16_LO_DS:
5710 sec->has_toc_reloc = 1;
5711 break;
5712
5713 /* Marker reloc. */
5714 case R_PPC64_ENTRY:
5715 break;
5716
5717 /* This relocation describes the C++ object vtable hierarchy.
5718 Reconstruct it for later use during GC. */
5719 case R_PPC64_GNU_VTINHERIT:
5720 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5721 return FALSE;
5722 break;
5723
5724 /* This relocation describes which C++ vtable entries are actually
5725 used. Record for later use during GC. */
5726 case R_PPC64_GNU_VTENTRY:
5727 BFD_ASSERT (h != NULL);
5728 if (h != NULL
5729 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5730 return FALSE;
5731 break;
5732
5733 case R_PPC64_REL14:
5734 case R_PPC64_REL14_BRTAKEN:
5735 case R_PPC64_REL14_BRNTAKEN:
5736 {
5737 asection *dest = NULL;
5738
5739 /* Heuristic: If jumping outside our section, chances are
5740 we are going to need a stub. */
5741 if (h != NULL)
5742 {
5743 /* If the sym is weak it may be overridden later, so
5744 don't assume we know where a weak sym lives. */
5745 if (h->root.type == bfd_link_hash_defined)
5746 dest = h->root.u.def.section;
5747 }
5748 else
5749 {
5750 Elf_Internal_Sym *isym;
5751
5752 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5753 abfd, r_symndx);
5754 if (isym == NULL)
5755 return FALSE;
5756
5757 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5758 }
5759
5760 if (dest != sec)
5761 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5762 }
5763 /* Fall through. */
5764
5765 case R_PPC64_REL24:
5766 plt_list = ifunc;
5767 if (h != NULL)
5768 {
5769 h->needs_plt = 1;
5770 if (h->root.root.string[0] == '.'
5771 && h->root.root.string[1] != '\0')
5772 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5773
5774 if (h == tga || h == dottga)
5775 {
5776 sec->has_tls_reloc = 1;
5777 if (rel != relocs
5778 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5779 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5780 /* We have a new-style __tls_get_addr call with
5781 a marker reloc. */
5782 ;
5783 else
5784 /* Mark this section as having an old-style call. */
5785 sec->has_tls_get_addr_call = 1;
5786 }
5787 plt_list = &h->plt.plist;
5788 }
5789
5790 /* We may need a .plt entry if the function this reloc
5791 refers to is in a shared lib. */
5792 if (plt_list
5793 && !update_plt_info (abfd, plt_list, rel->r_addend))
5794 return FALSE;
5795 break;
5796
5797 case R_PPC64_ADDR14:
5798 case R_PPC64_ADDR14_BRNTAKEN:
5799 case R_PPC64_ADDR14_BRTAKEN:
5800 case R_PPC64_ADDR24:
5801 goto dodyn;
5802
5803 case R_PPC64_TPREL64:
5804 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5805 if (bfd_link_dll (info))
5806 info->flags |= DF_STATIC_TLS;
5807 goto dotlstoc;
5808
5809 case R_PPC64_DTPMOD64:
5810 if (rel + 1 < rel_end
5811 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5812 && rel[1].r_offset == rel->r_offset + 8)
5813 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5814 else
5815 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5816 goto dotlstoc;
5817
5818 case R_PPC64_DTPREL64:
5819 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5820 if (rel != relocs
5821 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5822 && rel[-1].r_offset == rel->r_offset - 8)
5823 /* This is the second reloc of a dtpmod, dtprel pair.
5824 Don't mark with TLS_DTPREL. */
5825 goto dodyn;
5826
5827 dotlstoc:
5828 sec->has_tls_reloc = 1;
5829 if (h != NULL)
5830 {
5831 struct ppc_link_hash_entry *eh;
5832 eh = (struct ppc_link_hash_entry *) h;
5833 eh->tls_mask |= tls_type;
5834 }
5835 else
5836 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5837 rel->r_addend, tls_type))
5838 return FALSE;
5839
5840 ppc64_sec = ppc64_elf_section_data (sec);
5841 if (ppc64_sec->sec_type != sec_toc)
5842 {
5843 bfd_size_type amt;
5844
5845 /* One extra to simplify get_tls_mask. */
5846 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5847 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5848 if (ppc64_sec->u.toc.symndx == NULL)
5849 return FALSE;
5850 amt = sec->size * sizeof (bfd_vma) / 8;
5851 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5852 if (ppc64_sec->u.toc.add == NULL)
5853 return FALSE;
5854 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5855 ppc64_sec->sec_type = sec_toc;
5856 }
5857 BFD_ASSERT (rel->r_offset % 8 == 0);
5858 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5859 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5860
5861 /* Mark the second slot of a GD or LD entry.
5862 -1 to indicate GD and -2 to indicate LD. */
5863 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5864 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5865 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5866 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5867 goto dodyn;
5868
5869 case R_PPC64_TPREL16:
5870 case R_PPC64_TPREL16_LO:
5871 case R_PPC64_TPREL16_HI:
5872 case R_PPC64_TPREL16_HA:
5873 case R_PPC64_TPREL16_DS:
5874 case R_PPC64_TPREL16_LO_DS:
5875 case R_PPC64_TPREL16_HIGH:
5876 case R_PPC64_TPREL16_HIGHA:
5877 case R_PPC64_TPREL16_HIGHER:
5878 case R_PPC64_TPREL16_HIGHERA:
5879 case R_PPC64_TPREL16_HIGHEST:
5880 case R_PPC64_TPREL16_HIGHESTA:
5881 if (bfd_link_dll (info))
5882 info->flags |= DF_STATIC_TLS;
5883 goto dodyn;
5884
5885 case R_PPC64_ADDR64:
5886 if (is_opd
5887 && rel + 1 < rel_end
5888 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5889 {
5890 if (h != NULL)
5891 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5892 }
5893 /* Fall through. */
5894
5895 case R_PPC64_ADDR16:
5896 case R_PPC64_ADDR16_DS:
5897 case R_PPC64_ADDR16_HA:
5898 case R_PPC64_ADDR16_HI:
5899 case R_PPC64_ADDR16_HIGH:
5900 case R_PPC64_ADDR16_HIGHA:
5901 case R_PPC64_ADDR16_HIGHER:
5902 case R_PPC64_ADDR16_HIGHERA:
5903 case R_PPC64_ADDR16_HIGHEST:
5904 case R_PPC64_ADDR16_HIGHESTA:
5905 case R_PPC64_ADDR16_LO:
5906 case R_PPC64_ADDR16_LO_DS:
5907 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5908 && rel->r_addend == 0)
5909 {
5910 /* We may need a .plt entry if this reloc refers to a
5911 function in a shared lib. */
5912 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5913 return FALSE;
5914 h->pointer_equality_needed = 1;
5915 }
5916 /* Fall through. */
5917
5918 case R_PPC64_REL30:
5919 case R_PPC64_REL32:
5920 case R_PPC64_REL64:
5921 case R_PPC64_ADDR32:
5922 case R_PPC64_UADDR16:
5923 case R_PPC64_UADDR32:
5924 case R_PPC64_UADDR64:
5925 case R_PPC64_TOC:
5926 if (h != NULL && !bfd_link_pic (info))
5927 /* We may need a copy reloc. */
5928 h->non_got_ref = 1;
5929
5930 /* Don't propagate .opd relocs. */
5931 if (NO_OPD_RELOCS && is_opd)
5932 break;
5933
5934 /* If we are creating a shared library, and this is a reloc
5935 against a global symbol, or a non PC relative reloc
5936 against a local symbol, then we need to copy the reloc
5937 into the shared library. However, if we are linking with
5938 -Bsymbolic, we do not need to copy a reloc against a
5939 global symbol which is defined in an object we are
5940 including in the link (i.e., DEF_REGULAR is set). At
5941 this point we have not seen all the input files, so it is
5942 possible that DEF_REGULAR is not set now but will be set
5943 later (it is never cleared). In case of a weak definition,
5944 DEF_REGULAR may be cleared later by a strong definition in
5945 a shared library. We account for that possibility below by
5946 storing information in the dyn_relocs field of the hash
5947 table entry. A similar situation occurs when creating
5948 shared libraries and symbol visibility changes render the
5949 symbol local.
5950
5951 If on the other hand, we are creating an executable, we
5952 may need to keep relocations for symbols satisfied by a
5953 dynamic library if we manage to avoid copy relocs for the
5954 symbol. */
5955 dodyn:
5956 if ((bfd_link_pic (info)
5957 && (must_be_dyn_reloc (info, r_type)
5958 || (h != NULL
5959 && (!SYMBOLIC_BIND (info, h)
5960 || h->root.type == bfd_link_hash_defweak
5961 || !h->def_regular))))
5962 || (ELIMINATE_COPY_RELOCS
5963 && !bfd_link_pic (info)
5964 && h != NULL
5965 && (h->root.type == bfd_link_hash_defweak
5966 || !h->def_regular))
5967 || (!bfd_link_pic (info)
5968 && ifunc != NULL))
5969 {
5970 /* We must copy these reloc types into the output file.
5971 Create a reloc section in dynobj and make room for
5972 this reloc. */
5973 if (sreloc == NULL)
5974 {
5975 sreloc = _bfd_elf_make_dynamic_reloc_section
5976 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5977
5978 if (sreloc == NULL)
5979 return FALSE;
5980 }
5981
5982 /* If this is a global symbol, we count the number of
5983 relocations we need for this symbol. */
5984 if (h != NULL)
5985 {
5986 struct elf_dyn_relocs *p;
5987 struct elf_dyn_relocs **head;
5988
5989 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5990 p = *head;
5991 if (p == NULL || p->sec != sec)
5992 {
5993 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5994 if (p == NULL)
5995 return FALSE;
5996 p->next = *head;
5997 *head = p;
5998 p->sec = sec;
5999 p->count = 0;
6000 p->pc_count = 0;
6001 }
6002 p->count += 1;
6003 if (!must_be_dyn_reloc (info, r_type))
6004 p->pc_count += 1;
6005 }
6006 else
6007 {
6008 /* Track dynamic relocs needed for local syms too.
6009 We really need local syms available to do this
6010 easily. Oh well. */
6011 struct ppc_dyn_relocs *p;
6012 struct ppc_dyn_relocs **head;
6013 bfd_boolean is_ifunc;
6014 asection *s;
6015 void *vpp;
6016 Elf_Internal_Sym *isym;
6017
6018 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6019 abfd, r_symndx);
6020 if (isym == NULL)
6021 return FALSE;
6022
6023 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6024 if (s == NULL)
6025 s = sec;
6026
6027 vpp = &elf_section_data (s)->local_dynrel;
6028 head = (struct ppc_dyn_relocs **) vpp;
6029 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6030 p = *head;
6031 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6032 p = p->next;
6033 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6034 {
6035 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6036 if (p == NULL)
6037 return FALSE;
6038 p->next = *head;
6039 *head = p;
6040 p->sec = sec;
6041 p->ifunc = is_ifunc;
6042 p->count = 0;
6043 }
6044 p->count += 1;
6045 }
6046 }
6047 break;
6048
6049 default:
6050 break;
6051 }
6052 }
6053
6054 return TRUE;
6055 }
6056
6057 /* Merge backend specific data from an object file to the output
6058 object file when linking. */
6059
6060 static bfd_boolean
6061 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6062 {
6063 bfd *obfd = info->output_bfd;
6064 unsigned long iflags, oflags;
6065
6066 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6067 return TRUE;
6068
6069 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6070 return TRUE;
6071
6072 if (!_bfd_generic_verify_endian_match (ibfd, info))
6073 return FALSE;
6074
6075 iflags = elf_elfheader (ibfd)->e_flags;
6076 oflags = elf_elfheader (obfd)->e_flags;
6077
6078 if (iflags & ~EF_PPC64_ABI)
6079 {
6080 _bfd_error_handler
6081 /* xgettext:c-format */
6082 (_("%pB uses unknown e_flags 0x%lx"), ibfd, iflags);
6083 bfd_set_error (bfd_error_bad_value);
6084 return FALSE;
6085 }
6086 else if (iflags != oflags && iflags != 0)
6087 {
6088 _bfd_error_handler
6089 /* xgettext:c-format */
6090 (_("%pB: ABI version %ld is not compatible with ABI version %ld output"),
6091 ibfd, iflags, oflags);
6092 bfd_set_error (bfd_error_bad_value);
6093 return FALSE;
6094 }
6095
6096 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6097
6098 /* Merge Tag_compatibility attributes and any common GNU ones. */
6099 _bfd_elf_merge_object_attributes (ibfd, info);
6100
6101 return TRUE;
6102 }
6103
6104 static bfd_boolean
6105 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6106 {
6107 /* Print normal ELF private data. */
6108 _bfd_elf_print_private_bfd_data (abfd, ptr);
6109
6110 if (elf_elfheader (abfd)->e_flags != 0)
6111 {
6112 FILE *file = ptr;
6113
6114 fprintf (file, _("private flags = 0x%lx:"),
6115 elf_elfheader (abfd)->e_flags);
6116
6117 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6118 fprintf (file, _(" [abiv%ld]"),
6119 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6120 fputc ('\n', file);
6121 }
6122
6123 return TRUE;
6124 }
6125
6126 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6127 of the code entry point, and its section, which must be in the same
6128 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6129
6130 static bfd_vma
6131 opd_entry_value (asection *opd_sec,
6132 bfd_vma offset,
6133 asection **code_sec,
6134 bfd_vma *code_off,
6135 bfd_boolean in_code_sec)
6136 {
6137 bfd *opd_bfd = opd_sec->owner;
6138 Elf_Internal_Rela *relocs;
6139 Elf_Internal_Rela *lo, *hi, *look;
6140 bfd_vma val;
6141
6142 /* No relocs implies we are linking a --just-symbols object, or looking
6143 at a final linked executable with addr2line or somesuch. */
6144 if (opd_sec->reloc_count == 0)
6145 {
6146 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6147
6148 if (contents == NULL)
6149 {
6150 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6151 return (bfd_vma) -1;
6152 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6153 }
6154
6155 /* PR 17512: file: 64b9dfbb. */
6156 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6157 return (bfd_vma) -1;
6158
6159 val = bfd_get_64 (opd_bfd, contents + offset);
6160 if (code_sec != NULL)
6161 {
6162 asection *sec, *likely = NULL;
6163
6164 if (in_code_sec)
6165 {
6166 sec = *code_sec;
6167 if (sec->vma <= val
6168 && val < sec->vma + sec->size)
6169 likely = sec;
6170 else
6171 val = -1;
6172 }
6173 else
6174 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6175 if (sec->vma <= val
6176 && (sec->flags & SEC_LOAD) != 0
6177 && (sec->flags & SEC_ALLOC) != 0)
6178 likely = sec;
6179 if (likely != NULL)
6180 {
6181 *code_sec = likely;
6182 if (code_off != NULL)
6183 *code_off = val - likely->vma;
6184 }
6185 }
6186 return val;
6187 }
6188
6189 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6190
6191 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6192 if (relocs == NULL)
6193 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6194 /* PR 17512: file: df8e1fd6. */
6195 if (relocs == NULL)
6196 return (bfd_vma) -1;
6197
6198 /* Go find the opd reloc at the sym address. */
6199 lo = relocs;
6200 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6201 val = (bfd_vma) -1;
6202 while (lo < hi)
6203 {
6204 look = lo + (hi - lo) / 2;
6205 if (look->r_offset < offset)
6206 lo = look + 1;
6207 else if (look->r_offset > offset)
6208 hi = look;
6209 else
6210 {
6211 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6212
6213 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6214 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6215 {
6216 unsigned long symndx = ELF64_R_SYM (look->r_info);
6217 asection *sec = NULL;
6218
6219 if (symndx >= symtab_hdr->sh_info
6220 && elf_sym_hashes (opd_bfd) != NULL)
6221 {
6222 struct elf_link_hash_entry **sym_hashes;
6223 struct elf_link_hash_entry *rh;
6224
6225 sym_hashes = elf_sym_hashes (opd_bfd);
6226 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6227 if (rh != NULL)
6228 {
6229 rh = elf_follow_link (rh);
6230 if (rh->root.type != bfd_link_hash_defined
6231 && rh->root.type != bfd_link_hash_defweak)
6232 break;
6233 if (rh->root.u.def.section->owner == opd_bfd)
6234 {
6235 val = rh->root.u.def.value;
6236 sec = rh->root.u.def.section;
6237 }
6238 }
6239 }
6240
6241 if (sec == NULL)
6242 {
6243 Elf_Internal_Sym *sym;
6244
6245 if (symndx < symtab_hdr->sh_info)
6246 {
6247 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6248 if (sym == NULL)
6249 {
6250 size_t symcnt = symtab_hdr->sh_info;
6251 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6252 symcnt, 0,
6253 NULL, NULL, NULL);
6254 if (sym == NULL)
6255 break;
6256 symtab_hdr->contents = (bfd_byte *) sym;
6257 }
6258 sym += symndx;
6259 }
6260 else
6261 {
6262 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6263 1, symndx,
6264 NULL, NULL, NULL);
6265 if (sym == NULL)
6266 break;
6267 }
6268 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6269 if (sec == NULL)
6270 break;
6271 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6272 val = sym->st_value;
6273 }
6274
6275 val += look->r_addend;
6276 if (code_off != NULL)
6277 *code_off = val;
6278 if (code_sec != NULL)
6279 {
6280 if (in_code_sec && *code_sec != sec)
6281 return -1;
6282 else
6283 *code_sec = sec;
6284 }
6285 if (sec->output_section != NULL)
6286 val += sec->output_section->vma + sec->output_offset;
6287 }
6288 break;
6289 }
6290 }
6291
6292 return val;
6293 }
6294
6295 /* If the ELF symbol SYM might be a function in SEC, return the
6296 function size and set *CODE_OFF to the function's entry point,
6297 otherwise return zero. */
6298
6299 static bfd_size_type
6300 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6301 bfd_vma *code_off)
6302 {
6303 bfd_size_type size;
6304
6305 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6306 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6307 return 0;
6308
6309 size = 0;
6310 if (!(sym->flags & BSF_SYNTHETIC))
6311 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6312
6313 if (strcmp (sym->section->name, ".opd") == 0)
6314 {
6315 struct _opd_sec_data *opd = get_opd_info (sym->section);
6316 bfd_vma symval = sym->value;
6317
6318 if (opd != NULL
6319 && opd->adjust != NULL
6320 && elf_section_data (sym->section)->relocs != NULL)
6321 {
6322 /* opd_entry_value will use cached relocs that have been
6323 adjusted, but with raw symbols. That means both local
6324 and global symbols need adjusting. */
6325 long adjust = opd->adjust[OPD_NDX (symval)];
6326 if (adjust == -1)
6327 return 0;
6328 symval += adjust;
6329 }
6330
6331 if (opd_entry_value (sym->section, symval,
6332 &sec, code_off, TRUE) == (bfd_vma) -1)
6333 return 0;
6334 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6335 symbol. This size has nothing to do with the code size of the
6336 function, which is what we're supposed to return, but the
6337 code size isn't available without looking up the dot-sym.
6338 However, doing that would be a waste of time particularly
6339 since elf_find_function will look at the dot-sym anyway.
6340 Now, elf_find_function will keep the largest size of any
6341 function sym found at the code address of interest, so return
6342 1 here to avoid it incorrectly caching a larger function size
6343 for a small function. This does mean we return the wrong
6344 size for a new-ABI function of size 24, but all that does is
6345 disable caching for such functions. */
6346 if (size == 24)
6347 size = 1;
6348 }
6349 else
6350 {
6351 if (sym->section != sec)
6352 return 0;
6353 *code_off = sym->value;
6354 }
6355 if (size == 0)
6356 size = 1;
6357 return size;
6358 }
6359
6360 /* Return true if symbol is a strong function defined in an ELFv2
6361 object with st_other localentry bits of zero, ie. its local entry
6362 point coincides with its global entry point. */
6363
6364 static bfd_boolean
6365 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6366 {
6367 return (h != NULL
6368 && h->type == STT_FUNC
6369 && h->root.type == bfd_link_hash_defined
6370 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6371 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6372 && is_ppc64_elf (h->root.u.def.section->owner)
6373 && abiversion (h->root.u.def.section->owner) >= 2);
6374 }
6375
6376 /* Return true if symbol is defined in a regular object file. */
6377
6378 static bfd_boolean
6379 is_static_defined (struct elf_link_hash_entry *h)
6380 {
6381 return ((h->root.type == bfd_link_hash_defined
6382 || h->root.type == bfd_link_hash_defweak)
6383 && h->root.u.def.section != NULL
6384 && h->root.u.def.section->output_section != NULL);
6385 }
6386
6387 /* If FDH is a function descriptor symbol, return the associated code
6388 entry symbol if it is defined. Return NULL otherwise. */
6389
6390 static struct ppc_link_hash_entry *
6391 defined_code_entry (struct ppc_link_hash_entry *fdh)
6392 {
6393 if (fdh->is_func_descriptor)
6394 {
6395 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6396 if (fh->elf.root.type == bfd_link_hash_defined
6397 || fh->elf.root.type == bfd_link_hash_defweak)
6398 return fh;
6399 }
6400 return NULL;
6401 }
6402
6403 /* If FH is a function code entry symbol, return the associated
6404 function descriptor symbol if it is defined. Return NULL otherwise. */
6405
6406 static struct ppc_link_hash_entry *
6407 defined_func_desc (struct ppc_link_hash_entry *fh)
6408 {
6409 if (fh->oh != NULL
6410 && fh->oh->is_func_descriptor)
6411 {
6412 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6413 if (fdh->elf.root.type == bfd_link_hash_defined
6414 || fdh->elf.root.type == bfd_link_hash_defweak)
6415 return fdh;
6416 }
6417 return NULL;
6418 }
6419
6420 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6421
6422 /* Garbage collect sections, after first dealing with dot-symbols. */
6423
6424 static bfd_boolean
6425 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6426 {
6427 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6428
6429 if (htab != NULL && htab->need_func_desc_adj)
6430 {
6431 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6432 htab->need_func_desc_adj = 0;
6433 }
6434 return bfd_elf_gc_sections (abfd, info);
6435 }
6436
6437 /* Mark all our entry sym sections, both opd and code section. */
6438
6439 static void
6440 ppc64_elf_gc_keep (struct bfd_link_info *info)
6441 {
6442 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6443 struct bfd_sym_chain *sym;
6444
6445 if (htab == NULL)
6446 return;
6447
6448 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6449 {
6450 struct ppc_link_hash_entry *eh, *fh;
6451 asection *sec;
6452
6453 eh = (struct ppc_link_hash_entry *)
6454 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6455 if (eh == NULL)
6456 continue;
6457 if (eh->elf.root.type != bfd_link_hash_defined
6458 && eh->elf.root.type != bfd_link_hash_defweak)
6459 continue;
6460
6461 fh = defined_code_entry (eh);
6462 if (fh != NULL)
6463 {
6464 sec = fh->elf.root.u.def.section;
6465 sec->flags |= SEC_KEEP;
6466 }
6467 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6468 && opd_entry_value (eh->elf.root.u.def.section,
6469 eh->elf.root.u.def.value,
6470 &sec, NULL, FALSE) != (bfd_vma) -1)
6471 sec->flags |= SEC_KEEP;
6472
6473 sec = eh->elf.root.u.def.section;
6474 sec->flags |= SEC_KEEP;
6475 }
6476 }
6477
6478 /* Mark sections containing dynamically referenced symbols. When
6479 building shared libraries, we must assume that any visible symbol is
6480 referenced. */
6481
6482 static bfd_boolean
6483 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6484 {
6485 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6486 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6487 struct ppc_link_hash_entry *fdh;
6488 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6489
6490 /* Dynamic linking info is on the func descriptor sym. */
6491 fdh = defined_func_desc (eh);
6492 if (fdh != NULL)
6493 eh = fdh;
6494
6495 if ((eh->elf.root.type == bfd_link_hash_defined
6496 || eh->elf.root.type == bfd_link_hash_defweak)
6497 && ((eh->elf.ref_dynamic && !eh->elf.forced_local)
6498 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6499 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6500 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6501 && (!bfd_link_executable (info)
6502 || info->gc_keep_exported
6503 || info->export_dynamic
6504 || (eh->elf.dynamic
6505 && d != NULL
6506 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6507 && (eh->elf.versioned >= versioned
6508 || !bfd_hide_sym_by_version (info->version_info,
6509 eh->elf.root.root.string)))))
6510 {
6511 asection *code_sec;
6512 struct ppc_link_hash_entry *fh;
6513
6514 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6515
6516 /* Function descriptor syms cause the associated
6517 function code sym section to be marked. */
6518 fh = defined_code_entry (eh);
6519 if (fh != NULL)
6520 {
6521 code_sec = fh->elf.root.u.def.section;
6522 code_sec->flags |= SEC_KEEP;
6523 }
6524 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6525 && opd_entry_value (eh->elf.root.u.def.section,
6526 eh->elf.root.u.def.value,
6527 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6528 code_sec->flags |= SEC_KEEP;
6529 }
6530
6531 return TRUE;
6532 }
6533
6534 /* Return the section that should be marked against GC for a given
6535 relocation. */
6536
6537 static asection *
6538 ppc64_elf_gc_mark_hook (asection *sec,
6539 struct bfd_link_info *info,
6540 Elf_Internal_Rela *rel,
6541 struct elf_link_hash_entry *h,
6542 Elf_Internal_Sym *sym)
6543 {
6544 asection *rsec;
6545
6546 /* Syms return NULL if we're marking .opd, so we avoid marking all
6547 function sections, as all functions are referenced in .opd. */
6548 rsec = NULL;
6549 if (get_opd_info (sec) != NULL)
6550 return rsec;
6551
6552 if (h != NULL)
6553 {
6554 enum elf_ppc64_reloc_type r_type;
6555 struct ppc_link_hash_entry *eh, *fh, *fdh;
6556
6557 r_type = ELF64_R_TYPE (rel->r_info);
6558 switch (r_type)
6559 {
6560 case R_PPC64_GNU_VTINHERIT:
6561 case R_PPC64_GNU_VTENTRY:
6562 break;
6563
6564 default:
6565 switch (h->root.type)
6566 {
6567 case bfd_link_hash_defined:
6568 case bfd_link_hash_defweak:
6569 eh = (struct ppc_link_hash_entry *) h;
6570 fdh = defined_func_desc (eh);
6571 if (fdh != NULL)
6572 {
6573 /* -mcall-aixdesc code references the dot-symbol on
6574 a call reloc. Mark the function descriptor too
6575 against garbage collection. */
6576 fdh->elf.mark = 1;
6577 if (fdh->elf.is_weakalias)
6578 weakdef (&fdh->elf)->mark = 1;
6579 eh = fdh;
6580 }
6581
6582 /* Function descriptor syms cause the associated
6583 function code sym section to be marked. */
6584 fh = defined_code_entry (eh);
6585 if (fh != NULL)
6586 {
6587 /* They also mark their opd section. */
6588 eh->elf.root.u.def.section->gc_mark = 1;
6589
6590 rsec = fh->elf.root.u.def.section;
6591 }
6592 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6593 && opd_entry_value (eh->elf.root.u.def.section,
6594 eh->elf.root.u.def.value,
6595 &rsec, NULL, FALSE) != (bfd_vma) -1)
6596 eh->elf.root.u.def.section->gc_mark = 1;
6597 else
6598 rsec = h->root.u.def.section;
6599 break;
6600
6601 case bfd_link_hash_common:
6602 rsec = h->root.u.c.p->section;
6603 break;
6604
6605 default:
6606 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6607 }
6608 }
6609 }
6610 else
6611 {
6612 struct _opd_sec_data *opd;
6613
6614 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6615 opd = get_opd_info (rsec);
6616 if (opd != NULL && opd->func_sec != NULL)
6617 {
6618 rsec->gc_mark = 1;
6619
6620 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6621 }
6622 }
6623
6624 return rsec;
6625 }
6626
6627 /* The maximum size of .sfpr. */
6628 #define SFPR_MAX (218*4)
6629
6630 struct sfpr_def_parms
6631 {
6632 const char name[12];
6633 unsigned char lo, hi;
6634 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6635 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6636 };
6637
6638 /* Auto-generate _save*, _rest* functions in .sfpr.
6639 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6640 instead. */
6641
6642 static bfd_boolean
6643 sfpr_define (struct bfd_link_info *info,
6644 const struct sfpr_def_parms *parm,
6645 asection *stub_sec)
6646 {
6647 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6648 unsigned int i;
6649 size_t len = strlen (parm->name);
6650 bfd_boolean writing = FALSE;
6651 char sym[16];
6652
6653 if (htab == NULL)
6654 return FALSE;
6655
6656 memcpy (sym, parm->name, len);
6657 sym[len + 2] = 0;
6658
6659 for (i = parm->lo; i <= parm->hi; i++)
6660 {
6661 struct ppc_link_hash_entry *h;
6662
6663 sym[len + 0] = i / 10 + '0';
6664 sym[len + 1] = i % 10 + '0';
6665 h = (struct ppc_link_hash_entry *)
6666 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6667 if (stub_sec != NULL)
6668 {
6669 if (h != NULL
6670 && h->elf.root.type == bfd_link_hash_defined
6671 && h->elf.root.u.def.section == htab->sfpr)
6672 {
6673 struct elf_link_hash_entry *s;
6674 char buf[32];
6675 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6676 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6677 if (s == NULL)
6678 return FALSE;
6679 if (s->root.type == bfd_link_hash_new
6680 || (s->root.type = bfd_link_hash_defined
6681 && s->root.u.def.section == stub_sec))
6682 {
6683 s->root.type = bfd_link_hash_defined;
6684 s->root.u.def.section = stub_sec;
6685 s->root.u.def.value = (stub_sec->size - htab->sfpr->size
6686 + h->elf.root.u.def.value);
6687 s->ref_regular = 1;
6688 s->def_regular = 1;
6689 s->ref_regular_nonweak = 1;
6690 s->forced_local = 1;
6691 s->non_elf = 0;
6692 s->root.linker_def = 1;
6693 }
6694 }
6695 continue;
6696 }
6697 if (h != NULL)
6698 {
6699 h->save_res = 1;
6700 if (!h->elf.def_regular)
6701 {
6702 h->elf.root.type = bfd_link_hash_defined;
6703 h->elf.root.u.def.section = htab->sfpr;
6704 h->elf.root.u.def.value = htab->sfpr->size;
6705 h->elf.type = STT_FUNC;
6706 h->elf.def_regular = 1;
6707 h->elf.non_elf = 0;
6708 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6709 writing = TRUE;
6710 if (htab->sfpr->contents == NULL)
6711 {
6712 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6713 if (htab->sfpr->contents == NULL)
6714 return FALSE;
6715 }
6716 }
6717 }
6718 if (writing)
6719 {
6720 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6721 if (i != parm->hi)
6722 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6723 else
6724 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6725 htab->sfpr->size = p - htab->sfpr->contents;
6726 }
6727 }
6728
6729 return TRUE;
6730 }
6731
6732 static bfd_byte *
6733 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6734 {
6735 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6736 return p + 4;
6737 }
6738
6739 static bfd_byte *
6740 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6741 {
6742 p = savegpr0 (abfd, p, r);
6743 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6744 p = p + 4;
6745 bfd_put_32 (abfd, BLR, p);
6746 return p + 4;
6747 }
6748
6749 static bfd_byte *
6750 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6751 {
6752 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6753 return p + 4;
6754 }
6755
6756 static bfd_byte *
6757 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6758 {
6759 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6760 p = p + 4;
6761 p = restgpr0 (abfd, p, r);
6762 bfd_put_32 (abfd, MTLR_R0, p);
6763 p = p + 4;
6764 if (r == 29)
6765 {
6766 p = restgpr0 (abfd, p, 30);
6767 p = restgpr0 (abfd, p, 31);
6768 }
6769 bfd_put_32 (abfd, BLR, p);
6770 return p + 4;
6771 }
6772
6773 static bfd_byte *
6774 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6775 {
6776 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6777 return p + 4;
6778 }
6779
6780 static bfd_byte *
6781 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6782 {
6783 p = savegpr1 (abfd, p, r);
6784 bfd_put_32 (abfd, BLR, p);
6785 return p + 4;
6786 }
6787
6788 static bfd_byte *
6789 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6790 {
6791 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6792 return p + 4;
6793 }
6794
6795 static bfd_byte *
6796 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6797 {
6798 p = restgpr1 (abfd, p, r);
6799 bfd_put_32 (abfd, BLR, p);
6800 return p + 4;
6801 }
6802
6803 static bfd_byte *
6804 savefpr (bfd *abfd, bfd_byte *p, int r)
6805 {
6806 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6807 return p + 4;
6808 }
6809
6810 static bfd_byte *
6811 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6812 {
6813 p = savefpr (abfd, p, r);
6814 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6815 p = p + 4;
6816 bfd_put_32 (abfd, BLR, p);
6817 return p + 4;
6818 }
6819
6820 static bfd_byte *
6821 restfpr (bfd *abfd, bfd_byte *p, int r)
6822 {
6823 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6824 return p + 4;
6825 }
6826
6827 static bfd_byte *
6828 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6829 {
6830 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6831 p = p + 4;
6832 p = restfpr (abfd, p, r);
6833 bfd_put_32 (abfd, MTLR_R0, p);
6834 p = p + 4;
6835 if (r == 29)
6836 {
6837 p = restfpr (abfd, p, 30);
6838 p = restfpr (abfd, p, 31);
6839 }
6840 bfd_put_32 (abfd, BLR, p);
6841 return p + 4;
6842 }
6843
6844 static bfd_byte *
6845 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6846 {
6847 p = savefpr (abfd, p, r);
6848 bfd_put_32 (abfd, BLR, p);
6849 return p + 4;
6850 }
6851
6852 static bfd_byte *
6853 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6854 {
6855 p = restfpr (abfd, p, r);
6856 bfd_put_32 (abfd, BLR, p);
6857 return p + 4;
6858 }
6859
6860 static bfd_byte *
6861 savevr (bfd *abfd, bfd_byte *p, int r)
6862 {
6863 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6864 p = p + 4;
6865 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6866 return p + 4;
6867 }
6868
6869 static bfd_byte *
6870 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6871 {
6872 p = savevr (abfd, p, r);
6873 bfd_put_32 (abfd, BLR, p);
6874 return p + 4;
6875 }
6876
6877 static bfd_byte *
6878 restvr (bfd *abfd, bfd_byte *p, int r)
6879 {
6880 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6881 p = p + 4;
6882 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6883 return p + 4;
6884 }
6885
6886 static bfd_byte *
6887 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6888 {
6889 p = restvr (abfd, p, r);
6890 bfd_put_32 (abfd, BLR, p);
6891 return p + 4;
6892 }
6893
6894 /* Called via elf_link_hash_traverse to transfer dynamic linking
6895 information on function code symbol entries to their corresponding
6896 function descriptor symbol entries. */
6897
6898 static bfd_boolean
6899 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6900 {
6901 struct bfd_link_info *info;
6902 struct ppc_link_hash_table *htab;
6903 struct ppc_link_hash_entry *fh;
6904 struct ppc_link_hash_entry *fdh;
6905 bfd_boolean force_local;
6906
6907 fh = (struct ppc_link_hash_entry *) h;
6908 if (fh->elf.root.type == bfd_link_hash_indirect)
6909 return TRUE;
6910
6911 if (!fh->is_func)
6912 return TRUE;
6913
6914 if (fh->elf.root.root.string[0] != '.'
6915 || fh->elf.root.root.string[1] == '\0')
6916 return TRUE;
6917
6918 info = inf;
6919 htab = ppc_hash_table (info);
6920 if (htab == NULL)
6921 return FALSE;
6922
6923 /* Find the corresponding function descriptor symbol. */
6924 fdh = lookup_fdh (fh, htab);
6925
6926 /* Resolve undefined references to dot-symbols as the value
6927 in the function descriptor, if we have one in a regular object.
6928 This is to satisfy cases like ".quad .foo". Calls to functions
6929 in dynamic objects are handled elsewhere. */
6930 if ((fh->elf.root.type == bfd_link_hash_undefined
6931 || fh->elf.root.type == bfd_link_hash_undefweak)
6932 && (fdh->elf.root.type == bfd_link_hash_defined
6933 || fdh->elf.root.type == bfd_link_hash_defweak)
6934 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6935 && opd_entry_value (fdh->elf.root.u.def.section,
6936 fdh->elf.root.u.def.value,
6937 &fh->elf.root.u.def.section,
6938 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6939 {
6940 fh->elf.root.type = fdh->elf.root.type;
6941 fh->elf.forced_local = 1;
6942 fh->elf.def_regular = fdh->elf.def_regular;
6943 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6944 }
6945
6946 if (!fh->elf.dynamic)
6947 {
6948 struct plt_entry *ent;
6949
6950 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6951 if (ent->plt.refcount > 0)
6952 break;
6953 if (ent == NULL)
6954 return TRUE;
6955 }
6956
6957 /* Create a descriptor as undefined if necessary. */
6958 if (fdh == NULL
6959 && !bfd_link_executable (info)
6960 && (fh->elf.root.type == bfd_link_hash_undefined
6961 || fh->elf.root.type == bfd_link_hash_undefweak))
6962 {
6963 fdh = make_fdh (info, fh);
6964 if (fdh == NULL)
6965 return FALSE;
6966 }
6967
6968 /* We can't support overriding of symbols on a fake descriptor. */
6969 if (fdh != NULL
6970 && fdh->fake
6971 && (fh->elf.root.type == bfd_link_hash_defined
6972 || fh->elf.root.type == bfd_link_hash_defweak))
6973 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6974
6975 /* Transfer dynamic linking information to the function descriptor. */
6976 if (fdh != NULL)
6977 {
6978 fdh->elf.ref_regular |= fh->elf.ref_regular;
6979 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6980 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6981 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6982 fdh->elf.dynamic |= fh->elf.dynamic;
6983 fdh->elf.needs_plt |= (fh->elf.needs_plt
6984 || fh->elf.type == STT_FUNC
6985 || fh->elf.type == STT_GNU_IFUNC);
6986 move_plt_plist (fh, fdh);
6987
6988 if (!fdh->elf.forced_local
6989 && fh->elf.dynindx != -1)
6990 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6991 return FALSE;
6992 }
6993
6994 /* Now that the info is on the function descriptor, clear the
6995 function code sym info. Any function code syms for which we
6996 don't have a definition in a regular file, we force local.
6997 This prevents a shared library from exporting syms that have
6998 been imported from another library. Function code syms that
6999 are really in the library we must leave global to prevent the
7000 linker dragging in a definition from a static library. */
7001 force_local = (!fh->elf.def_regular
7002 || fdh == NULL
7003 || !fdh->elf.def_regular
7004 || fdh->elf.forced_local);
7005 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7006
7007 return TRUE;
7008 }
7009
7010 static const struct sfpr_def_parms save_res_funcs[] =
7011 {
7012 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7013 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7014 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7015 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7016 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7017 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7018 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7019 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7020 { "._savef", 14, 31, savefpr, savefpr1_tail },
7021 { "._restf", 14, 31, restfpr, restfpr1_tail },
7022 { "_savevr_", 20, 31, savevr, savevr_tail },
7023 { "_restvr_", 20, 31, restvr, restvr_tail }
7024 };
7025
7026 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7027 this hook to a) provide some gcc support functions, and b) transfer
7028 dynamic linking information gathered so far on function code symbol
7029 entries, to their corresponding function descriptor symbol entries. */
7030
7031 static bfd_boolean
7032 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7033 struct bfd_link_info *info)
7034 {
7035 struct ppc_link_hash_table *htab;
7036
7037 htab = ppc_hash_table (info);
7038 if (htab == NULL)
7039 return FALSE;
7040
7041 /* Provide any missing _save* and _rest* functions. */
7042 if (htab->sfpr != NULL)
7043 {
7044 unsigned int i;
7045
7046 htab->sfpr->size = 0;
7047 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7048 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7049 return FALSE;
7050 if (htab->sfpr->size == 0)
7051 htab->sfpr->flags |= SEC_EXCLUDE;
7052 }
7053
7054 if (bfd_link_relocatable (info))
7055 return TRUE;
7056
7057 if (htab->elf.hgot != NULL)
7058 {
7059 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7060 /* Make .TOC. defined so as to prevent it being made dynamic.
7061 The wrong value here is fixed later in ppc64_elf_set_toc. */
7062 if (!htab->elf.hgot->def_regular
7063 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7064 {
7065 htab->elf.hgot->root.type = bfd_link_hash_defined;
7066 htab->elf.hgot->root.u.def.value = 0;
7067 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7068 htab->elf.hgot->def_regular = 1;
7069 htab->elf.hgot->root.linker_def = 1;
7070 }
7071 htab->elf.hgot->type = STT_OBJECT;
7072 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7073 | STV_HIDDEN);
7074 }
7075
7076 if (htab->need_func_desc_adj)
7077 {
7078 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7079 htab->need_func_desc_adj = 0;
7080 }
7081
7082 return TRUE;
7083 }
7084
7085 /* Find dynamic relocs for H that apply to read-only sections. */
7086
7087 static asection *
7088 readonly_dynrelocs (struct elf_link_hash_entry *h)
7089 {
7090 struct ppc_link_hash_entry *eh;
7091 struct elf_dyn_relocs *p;
7092
7093 eh = (struct ppc_link_hash_entry *) h;
7094 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7095 {
7096 asection *s = p->sec->output_section;
7097
7098 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7099 return p->sec;
7100 }
7101 return NULL;
7102 }
7103
7104 /* Return true if we have dynamic relocs against H or any of its weak
7105 aliases, that apply to read-only sections. Cannot be used after
7106 size_dynamic_sections. */
7107
7108 static bfd_boolean
7109 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7110 {
7111 struct ppc_link_hash_entry *eh;
7112
7113 eh = (struct ppc_link_hash_entry *) h;
7114 do
7115 {
7116 if (readonly_dynrelocs (&eh->elf))
7117 return TRUE;
7118 eh = (struct ppc_link_hash_entry *) eh->elf.u.alias;
7119 } while (eh != NULL && &eh->elf != h);
7120
7121 return FALSE;
7122 }
7123
7124 /* Return whether EH has pc-relative dynamic relocs. */
7125
7126 static bfd_boolean
7127 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7128 {
7129 struct elf_dyn_relocs *p;
7130
7131 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7132 if (p->pc_count != 0)
7133 return TRUE;
7134 return FALSE;
7135 }
7136
7137 /* Return true if a global entry stub will be created for H. Valid
7138 for ELFv2 before plt entries have been allocated. */
7139
7140 static bfd_boolean
7141 global_entry_stub (struct elf_link_hash_entry *h)
7142 {
7143 struct plt_entry *pent;
7144
7145 if (!h->pointer_equality_needed
7146 || h->def_regular)
7147 return FALSE;
7148
7149 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7150 if (pent->plt.refcount > 0
7151 && pent->addend == 0)
7152 return TRUE;
7153
7154 return FALSE;
7155 }
7156
7157 /* Adjust a symbol defined by a dynamic object and referenced by a
7158 regular object. The current definition is in some section of the
7159 dynamic object, but we're not including those sections. We have to
7160 change the definition to something the rest of the link can
7161 understand. */
7162
7163 static bfd_boolean
7164 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7165 struct elf_link_hash_entry *h)
7166 {
7167 struct ppc_link_hash_table *htab;
7168 asection *s, *srel;
7169
7170 htab = ppc_hash_table (info);
7171 if (htab == NULL)
7172 return FALSE;
7173
7174 /* Deal with function syms. */
7175 if (h->type == STT_FUNC
7176 || h->type == STT_GNU_IFUNC
7177 || h->needs_plt)
7178 {
7179 bfd_boolean local = (((struct ppc_link_hash_entry *) h)->save_res
7180 || SYMBOL_CALLS_LOCAL (info, h)
7181 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
7182 /* Discard dyn_relocs when non-pic if we've decided that a
7183 function symbol is local and not an ifunc. We keep dynamic
7184 relocs for ifuncs when local rather than always emitting a
7185 plt call stub for them and defining the symbol on the call
7186 stub. We can't do that for ELFv1 anyway (a function symbol
7187 is defined on a descriptor, not code) and it can be faster at
7188 run-time due to not needing to bounce through a stub. The
7189 dyn_relocs for ifuncs will be applied even in a static
7190 executable. */
7191 if (!bfd_link_pic (info)
7192 && h->type != STT_GNU_IFUNC
7193 && local)
7194 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7195
7196 /* Clear procedure linkage table information for any symbol that
7197 won't need a .plt entry. */
7198 struct plt_entry *ent;
7199 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7200 if (ent->plt.refcount > 0)
7201 break;
7202 if (ent == NULL
7203 || (h->type != STT_GNU_IFUNC && local))
7204 {
7205 h->plt.plist = NULL;
7206 h->needs_plt = 0;
7207 h->pointer_equality_needed = 0;
7208 }
7209 else if (abiversion (info->output_bfd) >= 2)
7210 {
7211 /* Taking a function's address in a read/write section
7212 doesn't require us to define the function symbol in the
7213 executable on a global entry stub. A dynamic reloc can
7214 be used instead. The reason we prefer a few more dynamic
7215 relocs is that calling via a global entry stub costs a
7216 few more instructions, and pointer_equality_needed causes
7217 extra work in ld.so when resolving these symbols. */
7218 if (global_entry_stub (h))
7219 {
7220 if (!readonly_dynrelocs (h))
7221 {
7222 h->pointer_equality_needed = 0;
7223 /* If we haven't seen a branch reloc then we don't need
7224 a plt entry. */
7225 if (!h->needs_plt)
7226 h->plt.plist = NULL;
7227 }
7228 else if (!bfd_link_pic (info))
7229 /* We are going to be defining the function symbol on the
7230 plt stub, so no dyn_relocs needed when non-pic. */
7231 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7232 }
7233
7234 /* ELFv2 function symbols can't have copy relocs. */
7235 return TRUE;
7236 }
7237 else if (!h->needs_plt
7238 && !readonly_dynrelocs (h))
7239 {
7240 /* If we haven't seen a branch reloc then we don't need a
7241 plt entry. */
7242 h->plt.plist = NULL;
7243 h->pointer_equality_needed = 0;
7244 return TRUE;
7245 }
7246 }
7247 else
7248 h->plt.plist = NULL;
7249
7250 /* If this is a weak symbol, and there is a real definition, the
7251 processor independent code will have arranged for us to see the
7252 real definition first, and we can just use the same value. */
7253 if (h->is_weakalias)
7254 {
7255 struct elf_link_hash_entry *def = weakdef (h);
7256 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
7257 h->root.u.def.section = def->root.u.def.section;
7258 h->root.u.def.value = def->root.u.def.value;
7259 if (def->root.u.def.section == htab->elf.sdynbss
7260 || def->root.u.def.section == htab->elf.sdynrelro)
7261 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7262 return TRUE;
7263 }
7264
7265 /* If we are creating a shared library, we must presume that the
7266 only references to the symbol are via the global offset table.
7267 For such cases we need not do anything here; the relocations will
7268 be handled correctly by relocate_section. */
7269 if (bfd_link_pic (info))
7270 return TRUE;
7271
7272 /* If there are no references to this symbol that do not use the
7273 GOT, we don't need to generate a copy reloc. */
7274 if (!h->non_got_ref)
7275 return TRUE;
7276
7277 /* Don't generate a copy reloc for symbols defined in the executable. */
7278 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7279
7280 /* If -z nocopyreloc was given, don't generate them either. */
7281 || info->nocopyreloc
7282
7283 /* If we don't find any dynamic relocs in read-only sections, then
7284 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7285 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7286
7287 /* Protected variables do not work with .dynbss. The copy in
7288 .dynbss won't be used by the shared library with the protected
7289 definition for the variable. Text relocations are preferable
7290 to an incorrect program. */
7291 || h->protected_def)
7292 return TRUE;
7293
7294 if (h->plt.plist != NULL)
7295 {
7296 /* We should never get here, but unfortunately there are versions
7297 of gcc out there that improperly (for this ABI) put initialized
7298 function pointers, vtable refs and suchlike in read-only
7299 sections. Allow them to proceed, but warn that this might
7300 break at runtime. */
7301 info->callbacks->einfo
7302 (_("%P: copy reloc against `%pT' requires lazy plt linking; "
7303 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7304 h->root.root.string);
7305 }
7306
7307 /* This is a reference to a symbol defined by a dynamic object which
7308 is not a function. */
7309
7310 /* We must allocate the symbol in our .dynbss section, which will
7311 become part of the .bss section of the executable. There will be
7312 an entry for this symbol in the .dynsym section. The dynamic
7313 object will contain position independent code, so all references
7314 from the dynamic object to this symbol will go through the global
7315 offset table. The dynamic linker will use the .dynsym entry to
7316 determine the address it must put in the global offset table, so
7317 both the dynamic object and the regular object will refer to the
7318 same memory location for the variable. */
7319 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7320 {
7321 s = htab->elf.sdynrelro;
7322 srel = htab->elf.sreldynrelro;
7323 }
7324 else
7325 {
7326 s = htab->elf.sdynbss;
7327 srel = htab->elf.srelbss;
7328 }
7329 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7330 {
7331 /* We must generate a R_PPC64_COPY reloc to tell the dynamic
7332 linker to copy the initial value out of the dynamic object
7333 and into the runtime process image. */
7334 srel->size += sizeof (Elf64_External_Rela);
7335 h->needs_copy = 1;
7336 }
7337
7338 /* We no longer want dyn_relocs. */
7339 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7340 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7341 }
7342
7343 /* If given a function descriptor symbol, hide both the function code
7344 sym and the descriptor. */
7345 static void
7346 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7347 struct elf_link_hash_entry *h,
7348 bfd_boolean force_local)
7349 {
7350 struct ppc_link_hash_entry *eh;
7351 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7352
7353 eh = (struct ppc_link_hash_entry *) h;
7354 if (eh->is_func_descriptor)
7355 {
7356 struct ppc_link_hash_entry *fh = eh->oh;
7357
7358 if (fh == NULL)
7359 {
7360 const char *p, *q;
7361 struct elf_link_hash_table *htab = elf_hash_table (info);
7362 char save;
7363
7364 /* We aren't supposed to use alloca in BFD because on
7365 systems which do not have alloca the version in libiberty
7366 calls xmalloc, which might cause the program to crash
7367 when it runs out of memory. This function doesn't have a
7368 return status, so there's no way to gracefully return an
7369 error. So cheat. We know that string[-1] can be safely
7370 accessed; It's either a string in an ELF string table,
7371 or allocated in an objalloc structure. */
7372
7373 p = eh->elf.root.root.string - 1;
7374 save = *p;
7375 *(char *) p = '.';
7376 fh = (struct ppc_link_hash_entry *)
7377 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7378 *(char *) p = save;
7379
7380 /* Unfortunately, if it so happens that the string we were
7381 looking for was allocated immediately before this string,
7382 then we overwrote the string terminator. That's the only
7383 reason the lookup should fail. */
7384 if (fh == NULL)
7385 {
7386 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7387 while (q >= eh->elf.root.root.string && *q == *p)
7388 --q, --p;
7389 if (q < eh->elf.root.root.string && *p == '.')
7390 fh = (struct ppc_link_hash_entry *)
7391 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7392 }
7393 if (fh != NULL)
7394 {
7395 eh->oh = fh;
7396 fh->oh = eh;
7397 }
7398 }
7399 if (fh != NULL)
7400 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7401 }
7402 }
7403
7404 static bfd_boolean
7405 get_sym_h (struct elf_link_hash_entry **hp,
7406 Elf_Internal_Sym **symp,
7407 asection **symsecp,
7408 unsigned char **tls_maskp,
7409 Elf_Internal_Sym **locsymsp,
7410 unsigned long r_symndx,
7411 bfd *ibfd)
7412 {
7413 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7414
7415 if (r_symndx >= symtab_hdr->sh_info)
7416 {
7417 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7418 struct elf_link_hash_entry *h;
7419
7420 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7421 h = elf_follow_link (h);
7422
7423 if (hp != NULL)
7424 *hp = h;
7425
7426 if (symp != NULL)
7427 *symp = NULL;
7428
7429 if (symsecp != NULL)
7430 {
7431 asection *symsec = NULL;
7432 if (h->root.type == bfd_link_hash_defined
7433 || h->root.type == bfd_link_hash_defweak)
7434 symsec = h->root.u.def.section;
7435 *symsecp = symsec;
7436 }
7437
7438 if (tls_maskp != NULL)
7439 {
7440 struct ppc_link_hash_entry *eh;
7441
7442 eh = (struct ppc_link_hash_entry *) h;
7443 *tls_maskp = &eh->tls_mask;
7444 }
7445 }
7446 else
7447 {
7448 Elf_Internal_Sym *sym;
7449 Elf_Internal_Sym *locsyms = *locsymsp;
7450
7451 if (locsyms == NULL)
7452 {
7453 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7454 if (locsyms == NULL)
7455 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7456 symtab_hdr->sh_info,
7457 0, NULL, NULL, NULL);
7458 if (locsyms == NULL)
7459 return FALSE;
7460 *locsymsp = locsyms;
7461 }
7462 sym = locsyms + r_symndx;
7463
7464 if (hp != NULL)
7465 *hp = NULL;
7466
7467 if (symp != NULL)
7468 *symp = sym;
7469
7470 if (symsecp != NULL)
7471 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7472
7473 if (tls_maskp != NULL)
7474 {
7475 struct got_entry **lgot_ents;
7476 unsigned char *tls_mask;
7477
7478 tls_mask = NULL;
7479 lgot_ents = elf_local_got_ents (ibfd);
7480 if (lgot_ents != NULL)
7481 {
7482 struct plt_entry **local_plt = (struct plt_entry **)
7483 (lgot_ents + symtab_hdr->sh_info);
7484 unsigned char *lgot_masks = (unsigned char *)
7485 (local_plt + symtab_hdr->sh_info);
7486 tls_mask = &lgot_masks[r_symndx];
7487 }
7488 *tls_maskp = tls_mask;
7489 }
7490 }
7491 return TRUE;
7492 }
7493
7494 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7495 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7496 type suitable for optimization, and 1 otherwise. */
7497
7498 static int
7499 get_tls_mask (unsigned char **tls_maskp,
7500 unsigned long *toc_symndx,
7501 bfd_vma *toc_addend,
7502 Elf_Internal_Sym **locsymsp,
7503 const Elf_Internal_Rela *rel,
7504 bfd *ibfd)
7505 {
7506 unsigned long r_symndx;
7507 int next_r;
7508 struct elf_link_hash_entry *h;
7509 Elf_Internal_Sym *sym;
7510 asection *sec;
7511 bfd_vma off;
7512
7513 r_symndx = ELF64_R_SYM (rel->r_info);
7514 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7515 return 0;
7516
7517 if ((*tls_maskp != NULL
7518 && (**tls_maskp & TLS_TLS) != 0
7519 && **tls_maskp != (TLS_TLS | TLS_MARK))
7520 || sec == NULL
7521 || ppc64_elf_section_data (sec) == NULL
7522 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7523 return 1;
7524
7525 /* Look inside a TOC section too. */
7526 if (h != NULL)
7527 {
7528 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7529 off = h->root.u.def.value;
7530 }
7531 else
7532 off = sym->st_value;
7533 off += rel->r_addend;
7534 BFD_ASSERT (off % 8 == 0);
7535 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7536 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7537 if (toc_symndx != NULL)
7538 *toc_symndx = r_symndx;
7539 if (toc_addend != NULL)
7540 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7541 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7542 return 0;
7543 if ((h == NULL || is_static_defined (h))
7544 && (next_r == -1 || next_r == -2))
7545 return 1 - next_r;
7546 return 1;
7547 }
7548
7549 /* Find (or create) an entry in the tocsave hash table. */
7550
7551 static struct tocsave_entry *
7552 tocsave_find (struct ppc_link_hash_table *htab,
7553 enum insert_option insert,
7554 Elf_Internal_Sym **local_syms,
7555 const Elf_Internal_Rela *irela,
7556 bfd *ibfd)
7557 {
7558 unsigned long r_indx;
7559 struct elf_link_hash_entry *h;
7560 Elf_Internal_Sym *sym;
7561 struct tocsave_entry ent, *p;
7562 hashval_t hash;
7563 struct tocsave_entry **slot;
7564
7565 r_indx = ELF64_R_SYM (irela->r_info);
7566 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7567 return NULL;
7568 if (ent.sec == NULL || ent.sec->output_section == NULL)
7569 {
7570 _bfd_error_handler
7571 (_("%pB: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7572 return NULL;
7573 }
7574
7575 if (h != NULL)
7576 ent.offset = h->root.u.def.value;
7577 else
7578 ent.offset = sym->st_value;
7579 ent.offset += irela->r_addend;
7580
7581 hash = tocsave_htab_hash (&ent);
7582 slot = ((struct tocsave_entry **)
7583 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7584 if (slot == NULL)
7585 return NULL;
7586
7587 if (*slot == NULL)
7588 {
7589 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7590 if (p == NULL)
7591 return NULL;
7592 *p = ent;
7593 *slot = p;
7594 }
7595 return *slot;
7596 }
7597
7598 /* Adjust all global syms defined in opd sections. In gcc generated
7599 code for the old ABI, these will already have been done. */
7600
7601 static bfd_boolean
7602 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7603 {
7604 struct ppc_link_hash_entry *eh;
7605 asection *sym_sec;
7606 struct _opd_sec_data *opd;
7607
7608 if (h->root.type == bfd_link_hash_indirect)
7609 return TRUE;
7610
7611 if (h->root.type != bfd_link_hash_defined
7612 && h->root.type != bfd_link_hash_defweak)
7613 return TRUE;
7614
7615 eh = (struct ppc_link_hash_entry *) h;
7616 if (eh->adjust_done)
7617 return TRUE;
7618
7619 sym_sec = eh->elf.root.u.def.section;
7620 opd = get_opd_info (sym_sec);
7621 if (opd != NULL && opd->adjust != NULL)
7622 {
7623 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7624 if (adjust == -1)
7625 {
7626 /* This entry has been deleted. */
7627 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7628 if (dsec == NULL)
7629 {
7630 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7631 if (discarded_section (dsec))
7632 {
7633 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7634 break;
7635 }
7636 }
7637 eh->elf.root.u.def.value = 0;
7638 eh->elf.root.u.def.section = dsec;
7639 }
7640 else
7641 eh->elf.root.u.def.value += adjust;
7642 eh->adjust_done = 1;
7643 }
7644 return TRUE;
7645 }
7646
7647 /* Handles decrementing dynamic reloc counts for the reloc specified by
7648 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7649 have already been determined. */
7650
7651 static bfd_boolean
7652 dec_dynrel_count (bfd_vma r_info,
7653 asection *sec,
7654 struct bfd_link_info *info,
7655 Elf_Internal_Sym **local_syms,
7656 struct elf_link_hash_entry *h,
7657 Elf_Internal_Sym *sym)
7658 {
7659 enum elf_ppc64_reloc_type r_type;
7660 asection *sym_sec = NULL;
7661
7662 /* Can this reloc be dynamic? This switch, and later tests here
7663 should be kept in sync with the code in check_relocs. */
7664 r_type = ELF64_R_TYPE (r_info);
7665 switch (r_type)
7666 {
7667 default:
7668 return TRUE;
7669
7670 case R_PPC64_TPREL16:
7671 case R_PPC64_TPREL16_LO:
7672 case R_PPC64_TPREL16_HI:
7673 case R_PPC64_TPREL16_HA:
7674 case R_PPC64_TPREL16_DS:
7675 case R_PPC64_TPREL16_LO_DS:
7676 case R_PPC64_TPREL16_HIGH:
7677 case R_PPC64_TPREL16_HIGHA:
7678 case R_PPC64_TPREL16_HIGHER:
7679 case R_PPC64_TPREL16_HIGHERA:
7680 case R_PPC64_TPREL16_HIGHEST:
7681 case R_PPC64_TPREL16_HIGHESTA:
7682 case R_PPC64_TPREL64:
7683 case R_PPC64_DTPMOD64:
7684 case R_PPC64_DTPREL64:
7685 case R_PPC64_ADDR64:
7686 case R_PPC64_REL30:
7687 case R_PPC64_REL32:
7688 case R_PPC64_REL64:
7689 case R_PPC64_ADDR14:
7690 case R_PPC64_ADDR14_BRNTAKEN:
7691 case R_PPC64_ADDR14_BRTAKEN:
7692 case R_PPC64_ADDR16:
7693 case R_PPC64_ADDR16_DS:
7694 case R_PPC64_ADDR16_HA:
7695 case R_PPC64_ADDR16_HI:
7696 case R_PPC64_ADDR16_HIGH:
7697 case R_PPC64_ADDR16_HIGHA:
7698 case R_PPC64_ADDR16_HIGHER:
7699 case R_PPC64_ADDR16_HIGHERA:
7700 case R_PPC64_ADDR16_HIGHEST:
7701 case R_PPC64_ADDR16_HIGHESTA:
7702 case R_PPC64_ADDR16_LO:
7703 case R_PPC64_ADDR16_LO_DS:
7704 case R_PPC64_ADDR24:
7705 case R_PPC64_ADDR32:
7706 case R_PPC64_UADDR16:
7707 case R_PPC64_UADDR32:
7708 case R_PPC64_UADDR64:
7709 case R_PPC64_TOC:
7710 break;
7711 }
7712
7713 if (local_syms != NULL)
7714 {
7715 unsigned long r_symndx;
7716 bfd *ibfd = sec->owner;
7717
7718 r_symndx = ELF64_R_SYM (r_info);
7719 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7720 return FALSE;
7721 }
7722
7723 if ((bfd_link_pic (info)
7724 && (must_be_dyn_reloc (info, r_type)
7725 || (h != NULL
7726 && (!SYMBOLIC_BIND (info, h)
7727 || h->root.type == bfd_link_hash_defweak
7728 || !h->def_regular))))
7729 || (ELIMINATE_COPY_RELOCS
7730 && !bfd_link_pic (info)
7731 && h != NULL
7732 && (h->root.type == bfd_link_hash_defweak
7733 || !h->def_regular)))
7734 ;
7735 else
7736 return TRUE;
7737
7738 if (h != NULL)
7739 {
7740 struct elf_dyn_relocs *p;
7741 struct elf_dyn_relocs **pp;
7742 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7743
7744 /* elf_gc_sweep may have already removed all dyn relocs associated
7745 with local syms for a given section. Also, symbol flags are
7746 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7747 report a dynreloc miscount. */
7748 if (*pp == NULL && info->gc_sections)
7749 return TRUE;
7750
7751 while ((p = *pp) != NULL)
7752 {
7753 if (p->sec == sec)
7754 {
7755 if (!must_be_dyn_reloc (info, r_type))
7756 p->pc_count -= 1;
7757 p->count -= 1;
7758 if (p->count == 0)
7759 *pp = p->next;
7760 return TRUE;
7761 }
7762 pp = &p->next;
7763 }
7764 }
7765 else
7766 {
7767 struct ppc_dyn_relocs *p;
7768 struct ppc_dyn_relocs **pp;
7769 void *vpp;
7770 bfd_boolean is_ifunc;
7771
7772 if (local_syms == NULL)
7773 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7774 if (sym_sec == NULL)
7775 sym_sec = sec;
7776
7777 vpp = &elf_section_data (sym_sec)->local_dynrel;
7778 pp = (struct ppc_dyn_relocs **) vpp;
7779
7780 if (*pp == NULL && info->gc_sections)
7781 return TRUE;
7782
7783 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7784 while ((p = *pp) != NULL)
7785 {
7786 if (p->sec == sec && p->ifunc == is_ifunc)
7787 {
7788 p->count -= 1;
7789 if (p->count == 0)
7790 *pp = p->next;
7791 return TRUE;
7792 }
7793 pp = &p->next;
7794 }
7795 }
7796
7797 /* xgettext:c-format */
7798 _bfd_error_handler (_("dynreloc miscount for %pB, section %pA"),
7799 sec->owner, sec);
7800 bfd_set_error (bfd_error_bad_value);
7801 return FALSE;
7802 }
7803
7804 /* Remove unused Official Procedure Descriptor entries. Currently we
7805 only remove those associated with functions in discarded link-once
7806 sections, or weakly defined functions that have been overridden. It
7807 would be possible to remove many more entries for statically linked
7808 applications. */
7809
7810 bfd_boolean
7811 ppc64_elf_edit_opd (struct bfd_link_info *info)
7812 {
7813 bfd *ibfd;
7814 bfd_boolean some_edited = FALSE;
7815 asection *need_pad = NULL;
7816 struct ppc_link_hash_table *htab;
7817
7818 htab = ppc_hash_table (info);
7819 if (htab == NULL)
7820 return FALSE;
7821
7822 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7823 {
7824 asection *sec;
7825 Elf_Internal_Rela *relstart, *rel, *relend;
7826 Elf_Internal_Shdr *symtab_hdr;
7827 Elf_Internal_Sym *local_syms;
7828 struct _opd_sec_data *opd;
7829 bfd_boolean need_edit, add_aux_fields, broken;
7830 bfd_size_type cnt_16b = 0;
7831
7832 if (!is_ppc64_elf (ibfd))
7833 continue;
7834
7835 sec = bfd_get_section_by_name (ibfd, ".opd");
7836 if (sec == NULL || sec->size == 0)
7837 continue;
7838
7839 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7840 continue;
7841
7842 if (sec->output_section == bfd_abs_section_ptr)
7843 continue;
7844
7845 /* Look through the section relocs. */
7846 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7847 continue;
7848
7849 local_syms = NULL;
7850 symtab_hdr = &elf_symtab_hdr (ibfd);
7851
7852 /* Read the relocations. */
7853 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7854 info->keep_memory);
7855 if (relstart == NULL)
7856 return FALSE;
7857
7858 /* First run through the relocs to check they are sane, and to
7859 determine whether we need to edit this opd section. */
7860 need_edit = FALSE;
7861 broken = FALSE;
7862 need_pad = sec;
7863 relend = relstart + sec->reloc_count;
7864 for (rel = relstart; rel < relend; )
7865 {
7866 enum elf_ppc64_reloc_type r_type;
7867 unsigned long r_symndx;
7868 asection *sym_sec;
7869 struct elf_link_hash_entry *h;
7870 Elf_Internal_Sym *sym;
7871 bfd_vma offset;
7872
7873 /* .opd contains an array of 16 or 24 byte entries. We're
7874 only interested in the reloc pointing to a function entry
7875 point. */
7876 offset = rel->r_offset;
7877 if (rel + 1 == relend
7878 || rel[1].r_offset != offset + 8)
7879 {
7880 /* If someone messes with .opd alignment then after a
7881 "ld -r" we might have padding in the middle of .opd.
7882 Also, there's nothing to prevent someone putting
7883 something silly in .opd with the assembler. No .opd
7884 optimization for them! */
7885 broken_opd:
7886 _bfd_error_handler
7887 (_("%pB: .opd is not a regular array of opd entries"), ibfd);
7888 broken = TRUE;
7889 break;
7890 }
7891
7892 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7893 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7894 {
7895 _bfd_error_handler
7896 /* xgettext:c-format */
7897 (_("%pB: unexpected reloc type %u in .opd section"),
7898 ibfd, r_type);
7899 broken = TRUE;
7900 break;
7901 }
7902
7903 r_symndx = ELF64_R_SYM (rel->r_info);
7904 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7905 r_symndx, ibfd))
7906 goto error_ret;
7907
7908 if (sym_sec == NULL || sym_sec->owner == NULL)
7909 {
7910 const char *sym_name;
7911 if (h != NULL)
7912 sym_name = h->root.root.string;
7913 else
7914 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7915 sym_sec);
7916
7917 _bfd_error_handler
7918 /* xgettext:c-format */
7919 (_("%pB: undefined sym `%s' in .opd section"),
7920 ibfd, sym_name);
7921 broken = TRUE;
7922 break;
7923 }
7924
7925 /* opd entries are always for functions defined in the
7926 current input bfd. If the symbol isn't defined in the
7927 input bfd, then we won't be using the function in this
7928 bfd; It must be defined in a linkonce section in another
7929 bfd, or is weak. It's also possible that we are
7930 discarding the function due to a linker script /DISCARD/,
7931 which we test for via the output_section. */
7932 if (sym_sec->owner != ibfd
7933 || sym_sec->output_section == bfd_abs_section_ptr)
7934 need_edit = TRUE;
7935
7936 rel += 2;
7937 if (rel + 1 == relend
7938 || (rel + 2 < relend
7939 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7940 ++rel;
7941
7942 if (rel == relend)
7943 {
7944 if (sec->size == offset + 24)
7945 {
7946 need_pad = NULL;
7947 break;
7948 }
7949 if (sec->size == offset + 16)
7950 {
7951 cnt_16b++;
7952 break;
7953 }
7954 goto broken_opd;
7955 }
7956 else if (rel + 1 < relend
7957 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7958 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7959 {
7960 if (rel[0].r_offset == offset + 16)
7961 cnt_16b++;
7962 else if (rel[0].r_offset != offset + 24)
7963 goto broken_opd;
7964 }
7965 else
7966 goto broken_opd;
7967 }
7968
7969 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7970
7971 if (!broken && (need_edit || add_aux_fields))
7972 {
7973 Elf_Internal_Rela *write_rel;
7974 Elf_Internal_Shdr *rel_hdr;
7975 bfd_byte *rptr, *wptr;
7976 bfd_byte *new_contents;
7977 bfd_size_type amt;
7978
7979 new_contents = NULL;
7980 amt = OPD_NDX (sec->size) * sizeof (long);
7981 opd = &ppc64_elf_section_data (sec)->u.opd;
7982 opd->adjust = bfd_zalloc (sec->owner, amt);
7983 if (opd->adjust == NULL)
7984 return FALSE;
7985
7986 /* This seems a waste of time as input .opd sections are all
7987 zeros as generated by gcc, but I suppose there's no reason
7988 this will always be so. We might start putting something in
7989 the third word of .opd entries. */
7990 if ((sec->flags & SEC_IN_MEMORY) == 0)
7991 {
7992 bfd_byte *loc;
7993 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7994 {
7995 if (loc != NULL)
7996 free (loc);
7997 error_ret:
7998 if (local_syms != NULL
7999 && symtab_hdr->contents != (unsigned char *) local_syms)
8000 free (local_syms);
8001 if (elf_section_data (sec)->relocs != relstart)
8002 free (relstart);
8003 return FALSE;
8004 }
8005 sec->contents = loc;
8006 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8007 }
8008
8009 elf_section_data (sec)->relocs = relstart;
8010
8011 new_contents = sec->contents;
8012 if (add_aux_fields)
8013 {
8014 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8015 if (new_contents == NULL)
8016 return FALSE;
8017 need_pad = NULL;
8018 }
8019 wptr = new_contents;
8020 rptr = sec->contents;
8021 write_rel = relstart;
8022 for (rel = relstart; rel < relend; )
8023 {
8024 unsigned long r_symndx;
8025 asection *sym_sec;
8026 struct elf_link_hash_entry *h;
8027 struct ppc_link_hash_entry *fdh = NULL;
8028 Elf_Internal_Sym *sym;
8029 long opd_ent_size;
8030 Elf_Internal_Rela *next_rel;
8031 bfd_boolean skip;
8032
8033 r_symndx = ELF64_R_SYM (rel->r_info);
8034 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8035 r_symndx, ibfd))
8036 goto error_ret;
8037
8038 next_rel = rel + 2;
8039 if (next_rel + 1 == relend
8040 || (next_rel + 2 < relend
8041 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8042 ++next_rel;
8043
8044 /* See if the .opd entry is full 24 byte or
8045 16 byte (with fd_aux entry overlapped with next
8046 fd_func). */
8047 opd_ent_size = 24;
8048 if (next_rel == relend)
8049 {
8050 if (sec->size == rel->r_offset + 16)
8051 opd_ent_size = 16;
8052 }
8053 else if (next_rel->r_offset == rel->r_offset + 16)
8054 opd_ent_size = 16;
8055
8056 if (h != NULL
8057 && h->root.root.string[0] == '.')
8058 {
8059 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8060 if (fdh != NULL)
8061 {
8062 fdh = ppc_follow_link (fdh);
8063 if (fdh->elf.root.type != bfd_link_hash_defined
8064 && fdh->elf.root.type != bfd_link_hash_defweak)
8065 fdh = NULL;
8066 }
8067 }
8068
8069 skip = (sym_sec->owner != ibfd
8070 || sym_sec->output_section == bfd_abs_section_ptr);
8071 if (skip)
8072 {
8073 if (fdh != NULL && sym_sec->owner == ibfd)
8074 {
8075 /* Arrange for the function descriptor sym
8076 to be dropped. */
8077 fdh->elf.root.u.def.value = 0;
8078 fdh->elf.root.u.def.section = sym_sec;
8079 }
8080 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8081
8082 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8083 rel = next_rel;
8084 else
8085 while (1)
8086 {
8087 if (!dec_dynrel_count (rel->r_info, sec, info,
8088 NULL, h, sym))
8089 goto error_ret;
8090
8091 if (++rel == next_rel)
8092 break;
8093
8094 r_symndx = ELF64_R_SYM (rel->r_info);
8095 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8096 r_symndx, ibfd))
8097 goto error_ret;
8098 }
8099 }
8100 else
8101 {
8102 /* We'll be keeping this opd entry. */
8103 long adjust;
8104
8105 if (fdh != NULL)
8106 {
8107 /* Redefine the function descriptor symbol to
8108 this location in the opd section. It is
8109 necessary to update the value here rather
8110 than using an array of adjustments as we do
8111 for local symbols, because various places
8112 in the generic ELF code use the value
8113 stored in u.def.value. */
8114 fdh->elf.root.u.def.value = wptr - new_contents;
8115 fdh->adjust_done = 1;
8116 }
8117
8118 /* Local syms are a bit tricky. We could
8119 tweak them as they can be cached, but
8120 we'd need to look through the local syms
8121 for the function descriptor sym which we
8122 don't have at the moment. So keep an
8123 array of adjustments. */
8124 adjust = (wptr - new_contents) - (rptr - sec->contents);
8125 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8126
8127 if (wptr != rptr)
8128 memcpy (wptr, rptr, opd_ent_size);
8129 wptr += opd_ent_size;
8130 if (add_aux_fields && opd_ent_size == 16)
8131 {
8132 memset (wptr, '\0', 8);
8133 wptr += 8;
8134 }
8135
8136 /* We need to adjust any reloc offsets to point to the
8137 new opd entries. */
8138 for ( ; rel != next_rel; ++rel)
8139 {
8140 rel->r_offset += adjust;
8141 if (write_rel != rel)
8142 memcpy (write_rel, rel, sizeof (*rel));
8143 ++write_rel;
8144 }
8145 }
8146
8147 rptr += opd_ent_size;
8148 }
8149
8150 sec->size = wptr - new_contents;
8151 sec->reloc_count = write_rel - relstart;
8152 if (add_aux_fields)
8153 {
8154 free (sec->contents);
8155 sec->contents = new_contents;
8156 }
8157
8158 /* Fudge the header size too, as this is used later in
8159 elf_bfd_final_link if we are emitting relocs. */
8160 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8161 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8162 some_edited = TRUE;
8163 }
8164 else if (elf_section_data (sec)->relocs != relstart)
8165 free (relstart);
8166
8167 if (local_syms != NULL
8168 && symtab_hdr->contents != (unsigned char *) local_syms)
8169 {
8170 if (!info->keep_memory)
8171 free (local_syms);
8172 else
8173 symtab_hdr->contents = (unsigned char *) local_syms;
8174 }
8175 }
8176
8177 if (some_edited)
8178 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8179
8180 /* If we are doing a final link and the last .opd entry is just 16 byte
8181 long, add a 8 byte padding after it. */
8182 if (need_pad != NULL && !bfd_link_relocatable (info))
8183 {
8184 bfd_byte *p;
8185
8186 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8187 {
8188 BFD_ASSERT (need_pad->size > 0);
8189
8190 p = bfd_malloc (need_pad->size + 8);
8191 if (p == NULL)
8192 return FALSE;
8193
8194 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8195 p, 0, need_pad->size))
8196 return FALSE;
8197
8198 need_pad->contents = p;
8199 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8200 }
8201 else
8202 {
8203 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8204 if (p == NULL)
8205 return FALSE;
8206
8207 need_pad->contents = p;
8208 }
8209
8210 memset (need_pad->contents + need_pad->size, 0, 8);
8211 need_pad->size += 8;
8212 }
8213
8214 return TRUE;
8215 }
8216
8217 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8218
8219 asection *
8220 ppc64_elf_tls_setup (struct bfd_link_info *info)
8221 {
8222 struct ppc_link_hash_table *htab;
8223
8224 htab = ppc_hash_table (info);
8225 if (htab == NULL)
8226 return NULL;
8227
8228 if (abiversion (info->output_bfd) == 1)
8229 htab->opd_abi = 1;
8230
8231 if (htab->params->no_multi_toc)
8232 htab->do_multi_toc = 0;
8233 else if (!htab->do_multi_toc)
8234 htab->params->no_multi_toc = 1;
8235
8236 /* Default to --no-plt-localentry, as this option can cause problems
8237 with symbol interposition. For example, glibc libpthread.so and
8238 libc.so duplicate many pthread symbols, with a fallback
8239 implementation in libc.so. In some cases the fallback does more
8240 work than the pthread implementation. __pthread_condattr_destroy
8241 is one such symbol: the libpthread.so implementation is
8242 localentry:0 while the libc.so implementation is localentry:8.
8243 An app that "cleverly" uses dlopen to only load necessary
8244 libraries at runtime may omit loading libpthread.so when not
8245 running multi-threaded, which then results in the libc.so
8246 fallback symbols being used and ld.so complaining. Now there
8247 are workarounds in ld (see non_zero_localentry) to detect the
8248 pthread situation, but that may not be the only case where
8249 --plt-localentry can cause trouble. */
8250 if (htab->params->plt_localentry0 < 0)
8251 htab->params->plt_localentry0 = 0;
8252 if (htab->params->plt_localentry0
8253 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8254 FALSE, FALSE, FALSE) == NULL)
8255 _bfd_error_handler
8256 (_("warning: --plt-localentry is especially dangerous without "
8257 "ld.so support to detect ABI violations"));
8258
8259 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8260 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8261 FALSE, FALSE, TRUE));
8262 /* Move dynamic linking info to the function descriptor sym. */
8263 if (htab->tls_get_addr != NULL)
8264 func_desc_adjust (&htab->tls_get_addr->elf, info);
8265 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8266 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8267 FALSE, FALSE, TRUE));
8268 if (htab->params->tls_get_addr_opt)
8269 {
8270 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8271
8272 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8273 FALSE, FALSE, TRUE);
8274 if (opt != NULL)
8275 func_desc_adjust (opt, info);
8276 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8277 FALSE, FALSE, TRUE);
8278 if (opt_fd != NULL
8279 && (opt_fd->root.type == bfd_link_hash_defined
8280 || opt_fd->root.type == bfd_link_hash_defweak))
8281 {
8282 /* If glibc supports an optimized __tls_get_addr call stub,
8283 signalled by the presence of __tls_get_addr_opt, and we'll
8284 be calling __tls_get_addr via a plt call stub, then
8285 make __tls_get_addr point to __tls_get_addr_opt. */
8286 tga_fd = &htab->tls_get_addr_fd->elf;
8287 if (htab->elf.dynamic_sections_created
8288 && tga_fd != NULL
8289 && (tga_fd->type == STT_FUNC
8290 || tga_fd->needs_plt)
8291 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8292 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8293 {
8294 struct plt_entry *ent;
8295
8296 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8297 if (ent->plt.refcount > 0)
8298 break;
8299 if (ent != NULL)
8300 {
8301 tga_fd->root.type = bfd_link_hash_indirect;
8302 tga_fd->root.u.i.link = &opt_fd->root;
8303 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8304 opt_fd->mark = 1;
8305 if (opt_fd->dynindx != -1)
8306 {
8307 /* Use __tls_get_addr_opt in dynamic relocations. */
8308 opt_fd->dynindx = -1;
8309 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8310 opt_fd->dynstr_index);
8311 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8312 return NULL;
8313 }
8314 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8315 tga = &htab->tls_get_addr->elf;
8316 if (opt != NULL && tga != NULL)
8317 {
8318 tga->root.type = bfd_link_hash_indirect;
8319 tga->root.u.i.link = &opt->root;
8320 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8321 opt->mark = 1;
8322 _bfd_elf_link_hash_hide_symbol (info, opt,
8323 tga->forced_local);
8324 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8325 }
8326 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8327 htab->tls_get_addr_fd->is_func_descriptor = 1;
8328 if (htab->tls_get_addr != NULL)
8329 {
8330 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8331 htab->tls_get_addr->is_func = 1;
8332 }
8333 }
8334 }
8335 }
8336 else if (htab->params->tls_get_addr_opt < 0)
8337 htab->params->tls_get_addr_opt = 0;
8338 }
8339 return _bfd_elf_tls_setup (info->output_bfd, info);
8340 }
8341
8342 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8343 HASH1 or HASH2. */
8344
8345 static bfd_boolean
8346 branch_reloc_hash_match (const bfd *ibfd,
8347 const Elf_Internal_Rela *rel,
8348 const struct ppc_link_hash_entry *hash1,
8349 const struct ppc_link_hash_entry *hash2)
8350 {
8351 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8352 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8353 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8354
8355 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8356 {
8357 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8358 struct elf_link_hash_entry *h;
8359
8360 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8361 h = elf_follow_link (h);
8362 if (h == &hash1->elf || h == &hash2->elf)
8363 return TRUE;
8364 }
8365 return FALSE;
8366 }
8367
8368 /* Run through all the TLS relocs looking for optimization
8369 opportunities. The linker has been hacked (see ppc64elf.em) to do
8370 a preliminary section layout so that we know the TLS segment
8371 offsets. We can't optimize earlier because some optimizations need
8372 to know the tp offset, and we need to optimize before allocating
8373 dynamic relocations. */
8374
8375 bfd_boolean
8376 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8377 {
8378 bfd *ibfd;
8379 asection *sec;
8380 struct ppc_link_hash_table *htab;
8381 unsigned char *toc_ref;
8382 int pass;
8383
8384 if (!bfd_link_executable (info))
8385 return TRUE;
8386
8387 htab = ppc_hash_table (info);
8388 if (htab == NULL)
8389 return FALSE;
8390
8391 /* Make two passes over the relocs. On the first pass, mark toc
8392 entries involved with tls relocs, and check that tls relocs
8393 involved in setting up a tls_get_addr call are indeed followed by
8394 such a call. If they are not, we can't do any tls optimization.
8395 On the second pass twiddle tls_mask flags to notify
8396 relocate_section that optimization can be done, and adjust got
8397 and plt refcounts. */
8398 toc_ref = NULL;
8399 for (pass = 0; pass < 2; ++pass)
8400 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8401 {
8402 Elf_Internal_Sym *locsyms = NULL;
8403 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8404
8405 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8406 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8407 {
8408 Elf_Internal_Rela *relstart, *rel, *relend;
8409 bfd_boolean found_tls_get_addr_arg = 0;
8410
8411 /* Read the relocations. */
8412 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8413 info->keep_memory);
8414 if (relstart == NULL)
8415 {
8416 free (toc_ref);
8417 return FALSE;
8418 }
8419
8420 relend = relstart + sec->reloc_count;
8421 for (rel = relstart; rel < relend; rel++)
8422 {
8423 enum elf_ppc64_reloc_type r_type;
8424 unsigned long r_symndx;
8425 struct elf_link_hash_entry *h;
8426 Elf_Internal_Sym *sym;
8427 asection *sym_sec;
8428 unsigned char *tls_mask;
8429 unsigned char tls_set, tls_clear, tls_type = 0;
8430 bfd_vma value;
8431 bfd_boolean ok_tprel, is_local;
8432 long toc_ref_index = 0;
8433 int expecting_tls_get_addr = 0;
8434 bfd_boolean ret = FALSE;
8435
8436 r_symndx = ELF64_R_SYM (rel->r_info);
8437 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8438 r_symndx, ibfd))
8439 {
8440 err_free_rel:
8441 if (elf_section_data (sec)->relocs != relstart)
8442 free (relstart);
8443 if (toc_ref != NULL)
8444 free (toc_ref);
8445 if (locsyms != NULL
8446 && (elf_symtab_hdr (ibfd).contents
8447 != (unsigned char *) locsyms))
8448 free (locsyms);
8449 return ret;
8450 }
8451
8452 if (h != NULL)
8453 {
8454 if (h->root.type == bfd_link_hash_defined
8455 || h->root.type == bfd_link_hash_defweak)
8456 value = h->root.u.def.value;
8457 else if (h->root.type == bfd_link_hash_undefweak)
8458 value = 0;
8459 else
8460 {
8461 found_tls_get_addr_arg = 0;
8462 continue;
8463 }
8464 }
8465 else
8466 /* Symbols referenced by TLS relocs must be of type
8467 STT_TLS. So no need for .opd local sym adjust. */
8468 value = sym->st_value;
8469
8470 ok_tprel = FALSE;
8471 is_local = FALSE;
8472 if (h == NULL
8473 || !h->def_dynamic)
8474 {
8475 is_local = TRUE;
8476 if (h != NULL
8477 && h->root.type == bfd_link_hash_undefweak)
8478 ok_tprel = TRUE;
8479 else if (sym_sec != NULL
8480 && sym_sec->output_section != NULL)
8481 {
8482 value += sym_sec->output_offset;
8483 value += sym_sec->output_section->vma;
8484 value -= htab->elf.tls_sec->vma;
8485 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8486 < (bfd_vma) 1 << 32);
8487 }
8488 }
8489
8490 r_type = ELF64_R_TYPE (rel->r_info);
8491 /* If this section has old-style __tls_get_addr calls
8492 without marker relocs, then check that each
8493 __tls_get_addr call reloc is preceded by a reloc
8494 that conceivably belongs to the __tls_get_addr arg
8495 setup insn. If we don't find matching arg setup
8496 relocs, don't do any tls optimization. */
8497 if (pass == 0
8498 && sec->has_tls_get_addr_call
8499 && h != NULL
8500 && (h == &htab->tls_get_addr->elf
8501 || h == &htab->tls_get_addr_fd->elf)
8502 && !found_tls_get_addr_arg
8503 && is_branch_reloc (r_type))
8504 {
8505 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8506 "TLS optimization disabled\n"),
8507 ibfd, sec, rel->r_offset);
8508 ret = TRUE;
8509 goto err_free_rel;
8510 }
8511
8512 found_tls_get_addr_arg = 0;
8513 switch (r_type)
8514 {
8515 case R_PPC64_GOT_TLSLD16:
8516 case R_PPC64_GOT_TLSLD16_LO:
8517 expecting_tls_get_addr = 1;
8518 found_tls_get_addr_arg = 1;
8519 /* Fall through. */
8520
8521 case R_PPC64_GOT_TLSLD16_HI:
8522 case R_PPC64_GOT_TLSLD16_HA:
8523 /* These relocs should never be against a symbol
8524 defined in a shared lib. Leave them alone if
8525 that turns out to be the case. */
8526 if (!is_local)
8527 continue;
8528
8529 /* LD -> LE */
8530 tls_set = 0;
8531 tls_clear = TLS_LD;
8532 tls_type = TLS_TLS | TLS_LD;
8533 break;
8534
8535 case R_PPC64_GOT_TLSGD16:
8536 case R_PPC64_GOT_TLSGD16_LO:
8537 expecting_tls_get_addr = 1;
8538 found_tls_get_addr_arg = 1;
8539 /* Fall through. */
8540
8541 case R_PPC64_GOT_TLSGD16_HI:
8542 case R_PPC64_GOT_TLSGD16_HA:
8543 if (ok_tprel)
8544 /* GD -> LE */
8545 tls_set = 0;
8546 else
8547 /* GD -> IE */
8548 tls_set = TLS_TLS | TLS_TPRELGD;
8549 tls_clear = TLS_GD;
8550 tls_type = TLS_TLS | TLS_GD;
8551 break;
8552
8553 case R_PPC64_GOT_TPREL16_DS:
8554 case R_PPC64_GOT_TPREL16_LO_DS:
8555 case R_PPC64_GOT_TPREL16_HI:
8556 case R_PPC64_GOT_TPREL16_HA:
8557 if (ok_tprel)
8558 {
8559 /* IE -> LE */
8560 tls_set = 0;
8561 tls_clear = TLS_TPREL;
8562 tls_type = TLS_TLS | TLS_TPREL;
8563 break;
8564 }
8565 continue;
8566
8567 case R_PPC64_TLSGD:
8568 case R_PPC64_TLSLD:
8569 found_tls_get_addr_arg = 1;
8570 /* Fall through. */
8571
8572 case R_PPC64_TLS:
8573 case R_PPC64_TOC16:
8574 case R_PPC64_TOC16_LO:
8575 if (sym_sec == NULL || sym_sec != toc)
8576 continue;
8577
8578 /* Mark this toc entry as referenced by a TLS
8579 code sequence. We can do that now in the
8580 case of R_PPC64_TLS, and after checking for
8581 tls_get_addr for the TOC16 relocs. */
8582 if (toc_ref == NULL)
8583 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8584 if (toc_ref == NULL)
8585 goto err_free_rel;
8586
8587 if (h != NULL)
8588 value = h->root.u.def.value;
8589 else
8590 value = sym->st_value;
8591 value += rel->r_addend;
8592 if (value % 8 != 0)
8593 continue;
8594 BFD_ASSERT (value < toc->size
8595 && toc->output_offset % 8 == 0);
8596 toc_ref_index = (value + toc->output_offset) / 8;
8597 if (r_type == R_PPC64_TLS
8598 || r_type == R_PPC64_TLSGD
8599 || r_type == R_PPC64_TLSLD)
8600 {
8601 toc_ref[toc_ref_index] = 1;
8602 continue;
8603 }
8604
8605 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8606 continue;
8607
8608 tls_set = 0;
8609 tls_clear = 0;
8610 expecting_tls_get_addr = 2;
8611 break;
8612
8613 case R_PPC64_TPREL64:
8614 if (pass == 0
8615 || sec != toc
8616 || toc_ref == NULL
8617 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8618 continue;
8619 if (ok_tprel)
8620 {
8621 /* IE -> LE */
8622 tls_set = TLS_EXPLICIT;
8623 tls_clear = TLS_TPREL;
8624 break;
8625 }
8626 continue;
8627
8628 case R_PPC64_DTPMOD64:
8629 if (pass == 0
8630 || sec != toc
8631 || toc_ref == NULL
8632 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8633 continue;
8634 if (rel + 1 < relend
8635 && (rel[1].r_info
8636 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8637 && rel[1].r_offset == rel->r_offset + 8)
8638 {
8639 if (ok_tprel)
8640 /* GD -> LE */
8641 tls_set = TLS_EXPLICIT | TLS_GD;
8642 else
8643 /* GD -> IE */
8644 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8645 tls_clear = TLS_GD;
8646 }
8647 else
8648 {
8649 if (!is_local)
8650 continue;
8651
8652 /* LD -> LE */
8653 tls_set = TLS_EXPLICIT;
8654 tls_clear = TLS_LD;
8655 }
8656 break;
8657
8658 default:
8659 continue;
8660 }
8661
8662 if (pass == 0)
8663 {
8664 if (!expecting_tls_get_addr
8665 || !sec->has_tls_get_addr_call)
8666 continue;
8667
8668 if (rel + 1 < relend
8669 && branch_reloc_hash_match (ibfd, rel + 1,
8670 htab->tls_get_addr,
8671 htab->tls_get_addr_fd))
8672 {
8673 if (expecting_tls_get_addr == 2)
8674 {
8675 /* Check for toc tls entries. */
8676 unsigned char *toc_tls;
8677 int retval;
8678
8679 retval = get_tls_mask (&toc_tls, NULL, NULL,
8680 &locsyms,
8681 rel, ibfd);
8682 if (retval == 0)
8683 goto err_free_rel;
8684 if (toc_tls != NULL)
8685 {
8686 if ((*toc_tls & TLS_TLS) != 0
8687 && ((*toc_tls & (TLS_GD | TLS_LD)) != 0))
8688 found_tls_get_addr_arg = 1;
8689 if (retval > 1)
8690 toc_ref[toc_ref_index] = 1;
8691 }
8692 }
8693 continue;
8694 }
8695
8696 /* Uh oh, we didn't find the expected call. We
8697 could just mark this symbol to exclude it
8698 from tls optimization but it's safer to skip
8699 the entire optimization. */
8700 /* xgettext:c-format */
8701 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8702 "TLS optimization disabled\n"),
8703 ibfd, sec, rel->r_offset);
8704 ret = TRUE;
8705 goto err_free_rel;
8706 }
8707
8708 /* If we don't have old-style __tls_get_addr calls
8709 without TLSGD/TLSLD marker relocs, and we haven't
8710 found a new-style __tls_get_addr call with a
8711 marker for this symbol, then we either have a
8712 broken object file or an -mlongcall style
8713 indirect call to __tls_get_addr without a marker.
8714 Disable optimization in this case. */
8715 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
8716 && (tls_set & TLS_EXPLICIT) == 0
8717 && !sec->has_tls_get_addr_call
8718 && ((*tls_mask & (TLS_TLS | TLS_MARK))
8719 != (TLS_TLS | TLS_MARK)))
8720 continue;
8721
8722 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8723 {
8724 struct plt_entry *ent;
8725 for (ent = htab->tls_get_addr->elf.plt.plist;
8726 ent != NULL;
8727 ent = ent->next)
8728 if (ent->addend == 0)
8729 {
8730 if (ent->plt.refcount > 0)
8731 {
8732 ent->plt.refcount -= 1;
8733 expecting_tls_get_addr = 0;
8734 }
8735 break;
8736 }
8737 }
8738
8739 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8740 {
8741 struct plt_entry *ent;
8742 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8743 ent != NULL;
8744 ent = ent->next)
8745 if (ent->addend == 0)
8746 {
8747 if (ent->plt.refcount > 0)
8748 ent->plt.refcount -= 1;
8749 break;
8750 }
8751 }
8752
8753 if (tls_clear == 0)
8754 continue;
8755
8756 if ((tls_set & TLS_EXPLICIT) == 0)
8757 {
8758 struct got_entry *ent;
8759
8760 /* Adjust got entry for this reloc. */
8761 if (h != NULL)
8762 ent = h->got.glist;
8763 else
8764 ent = elf_local_got_ents (ibfd)[r_symndx];
8765
8766 for (; ent != NULL; ent = ent->next)
8767 if (ent->addend == rel->r_addend
8768 && ent->owner == ibfd
8769 && ent->tls_type == tls_type)
8770 break;
8771 if (ent == NULL)
8772 abort ();
8773
8774 if (tls_set == 0)
8775 {
8776 /* We managed to get rid of a got entry. */
8777 if (ent->got.refcount > 0)
8778 ent->got.refcount -= 1;
8779 }
8780 }
8781 else
8782 {
8783 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8784 we'll lose one or two dyn relocs. */
8785 if (!dec_dynrel_count (rel->r_info, sec, info,
8786 NULL, h, sym))
8787 return FALSE;
8788
8789 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8790 {
8791 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8792 NULL, h, sym))
8793 return FALSE;
8794 }
8795 }
8796
8797 *tls_mask |= tls_set;
8798 *tls_mask &= ~tls_clear;
8799 }
8800
8801 if (elf_section_data (sec)->relocs != relstart)
8802 free (relstart);
8803 }
8804
8805 if (locsyms != NULL
8806 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8807 {
8808 if (!info->keep_memory)
8809 free (locsyms);
8810 else
8811 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8812 }
8813 }
8814
8815 if (toc_ref != NULL)
8816 free (toc_ref);
8817 htab->do_tls_opt = 1;
8818 return TRUE;
8819 }
8820
8821 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8822 the values of any global symbols in a toc section that has been
8823 edited. Globals in toc sections should be a rarity, so this function
8824 sets a flag if any are found in toc sections other than the one just
8825 edited, so that further hash table traversals can be avoided. */
8826
8827 struct adjust_toc_info
8828 {
8829 asection *toc;
8830 unsigned long *skip;
8831 bfd_boolean global_toc_syms;
8832 };
8833
8834 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8835
8836 static bfd_boolean
8837 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8838 {
8839 struct ppc_link_hash_entry *eh;
8840 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8841 unsigned long i;
8842
8843 if (h->root.type != bfd_link_hash_defined
8844 && h->root.type != bfd_link_hash_defweak)
8845 return TRUE;
8846
8847 eh = (struct ppc_link_hash_entry *) h;
8848 if (eh->adjust_done)
8849 return TRUE;
8850
8851 if (eh->elf.root.u.def.section == toc_inf->toc)
8852 {
8853 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8854 i = toc_inf->toc->rawsize >> 3;
8855 else
8856 i = eh->elf.root.u.def.value >> 3;
8857
8858 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8859 {
8860 _bfd_error_handler
8861 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8862 do
8863 ++i;
8864 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8865 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8866 }
8867
8868 eh->elf.root.u.def.value -= toc_inf->skip[i];
8869 eh->adjust_done = 1;
8870 }
8871 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8872 toc_inf->global_toc_syms = TRUE;
8873
8874 return TRUE;
8875 }
8876
8877 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8878 on a _LO variety toc/got reloc. */
8879
8880 static bfd_boolean
8881 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8882 {
8883 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8884 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8885 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8886 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8887 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8888 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8889 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8890 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8891 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8892 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8893 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8894 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8895 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8896 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8897 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8898 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8899 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8900 /* Exclude lfqu by testing reloc. If relocs are ever
8901 defined for the reduced D field in psq_lu then those
8902 will need testing too. */
8903 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8904 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8905 && (insn & 1) == 0)
8906 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8907 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8908 /* Exclude stfqu. psq_stu as above for psq_lu. */
8909 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8910 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8911 && (insn & 1) == 0));
8912 }
8913
8914 /* Examine all relocs referencing .toc sections in order to remove
8915 unused .toc entries. */
8916
8917 bfd_boolean
8918 ppc64_elf_edit_toc (struct bfd_link_info *info)
8919 {
8920 bfd *ibfd;
8921 struct adjust_toc_info toc_inf;
8922 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8923
8924 htab->do_toc_opt = 1;
8925 toc_inf.global_toc_syms = TRUE;
8926 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8927 {
8928 asection *toc, *sec;
8929 Elf_Internal_Shdr *symtab_hdr;
8930 Elf_Internal_Sym *local_syms;
8931 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8932 unsigned long *skip, *drop;
8933 unsigned char *used;
8934 unsigned char *keep, last, some_unused;
8935
8936 if (!is_ppc64_elf (ibfd))
8937 continue;
8938
8939 toc = bfd_get_section_by_name (ibfd, ".toc");
8940 if (toc == NULL
8941 || toc->size == 0
8942 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8943 || discarded_section (toc))
8944 continue;
8945
8946 toc_relocs = NULL;
8947 local_syms = NULL;
8948 symtab_hdr = &elf_symtab_hdr (ibfd);
8949
8950 /* Look at sections dropped from the final link. */
8951 skip = NULL;
8952 relstart = NULL;
8953 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8954 {
8955 if (sec->reloc_count == 0
8956 || !discarded_section (sec)
8957 || get_opd_info (sec)
8958 || (sec->flags & SEC_ALLOC) == 0
8959 || (sec->flags & SEC_DEBUGGING) != 0)
8960 continue;
8961
8962 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8963 if (relstart == NULL)
8964 goto error_ret;
8965
8966 /* Run through the relocs to see which toc entries might be
8967 unused. */
8968 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8969 {
8970 enum elf_ppc64_reloc_type r_type;
8971 unsigned long r_symndx;
8972 asection *sym_sec;
8973 struct elf_link_hash_entry *h;
8974 Elf_Internal_Sym *sym;
8975 bfd_vma val;
8976
8977 r_type = ELF64_R_TYPE (rel->r_info);
8978 switch (r_type)
8979 {
8980 default:
8981 continue;
8982
8983 case R_PPC64_TOC16:
8984 case R_PPC64_TOC16_LO:
8985 case R_PPC64_TOC16_HI:
8986 case R_PPC64_TOC16_HA:
8987 case R_PPC64_TOC16_DS:
8988 case R_PPC64_TOC16_LO_DS:
8989 break;
8990 }
8991
8992 r_symndx = ELF64_R_SYM (rel->r_info);
8993 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8994 r_symndx, ibfd))
8995 goto error_ret;
8996
8997 if (sym_sec != toc)
8998 continue;
8999
9000 if (h != NULL)
9001 val = h->root.u.def.value;
9002 else
9003 val = sym->st_value;
9004 val += rel->r_addend;
9005
9006 if (val >= toc->size)
9007 continue;
9008
9009 /* Anything in the toc ought to be aligned to 8 bytes.
9010 If not, don't mark as unused. */
9011 if (val & 7)
9012 continue;
9013
9014 if (skip == NULL)
9015 {
9016 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9017 if (skip == NULL)
9018 goto error_ret;
9019 }
9020
9021 skip[val >> 3] = ref_from_discarded;
9022 }
9023
9024 if (elf_section_data (sec)->relocs != relstart)
9025 free (relstart);
9026 }
9027
9028 /* For largetoc loads of address constants, we can convert
9029 . addis rx,2,addr@got@ha
9030 . ld ry,addr@got@l(rx)
9031 to
9032 . addis rx,2,addr@toc@ha
9033 . addi ry,rx,addr@toc@l
9034 when addr is within 2G of the toc pointer. This then means
9035 that the word storing "addr" in the toc is no longer needed. */
9036
9037 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9038 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9039 && toc->reloc_count != 0)
9040 {
9041 /* Read toc relocs. */
9042 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9043 info->keep_memory);
9044 if (toc_relocs == NULL)
9045 goto error_ret;
9046
9047 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9048 {
9049 enum elf_ppc64_reloc_type r_type;
9050 unsigned long r_symndx;
9051 asection *sym_sec;
9052 struct elf_link_hash_entry *h;
9053 Elf_Internal_Sym *sym;
9054 bfd_vma val, addr;
9055
9056 r_type = ELF64_R_TYPE (rel->r_info);
9057 if (r_type != R_PPC64_ADDR64)
9058 continue;
9059
9060 r_symndx = ELF64_R_SYM (rel->r_info);
9061 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9062 r_symndx, ibfd))
9063 goto error_ret;
9064
9065 if (sym_sec == NULL
9066 || sym_sec->output_section == NULL
9067 || discarded_section (sym_sec))
9068 continue;
9069
9070 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9071 continue;
9072
9073 if (h != NULL)
9074 {
9075 if (h->type == STT_GNU_IFUNC)
9076 continue;
9077 val = h->root.u.def.value;
9078 }
9079 else
9080 {
9081 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9082 continue;
9083 val = sym->st_value;
9084 }
9085 val += rel->r_addend;
9086 val += sym_sec->output_section->vma + sym_sec->output_offset;
9087
9088 /* We don't yet know the exact toc pointer value, but we
9089 know it will be somewhere in the toc section. Don't
9090 optimize if the difference from any possible toc
9091 pointer is outside [ff..f80008000, 7fff7fff]. */
9092 addr = toc->output_section->vma + TOC_BASE_OFF;
9093 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9094 continue;
9095
9096 addr = toc->output_section->vma + toc->output_section->rawsize;
9097 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9098 continue;
9099
9100 if (skip == NULL)
9101 {
9102 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9103 if (skip == NULL)
9104 goto error_ret;
9105 }
9106
9107 skip[rel->r_offset >> 3]
9108 |= can_optimize | ((rel - toc_relocs) << 2);
9109 }
9110 }
9111
9112 if (skip == NULL)
9113 continue;
9114
9115 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9116 if (used == NULL)
9117 {
9118 error_ret:
9119 if (local_syms != NULL
9120 && symtab_hdr->contents != (unsigned char *) local_syms)
9121 free (local_syms);
9122 if (sec != NULL
9123 && relstart != NULL
9124 && elf_section_data (sec)->relocs != relstart)
9125 free (relstart);
9126 if (toc_relocs != NULL
9127 && elf_section_data (toc)->relocs != toc_relocs)
9128 free (toc_relocs);
9129 if (skip != NULL)
9130 free (skip);
9131 return FALSE;
9132 }
9133
9134 /* Now check all kept sections that might reference the toc.
9135 Check the toc itself last. */
9136 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9137 : ibfd->sections);
9138 sec != NULL;
9139 sec = (sec == toc ? NULL
9140 : sec->next == NULL ? toc
9141 : sec->next == toc && toc->next ? toc->next
9142 : sec->next))
9143 {
9144 int repeat;
9145
9146 if (sec->reloc_count == 0
9147 || discarded_section (sec)
9148 || get_opd_info (sec)
9149 || (sec->flags & SEC_ALLOC) == 0
9150 || (sec->flags & SEC_DEBUGGING) != 0)
9151 continue;
9152
9153 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9154 info->keep_memory);
9155 if (relstart == NULL)
9156 {
9157 free (used);
9158 goto error_ret;
9159 }
9160
9161 /* Mark toc entries referenced as used. */
9162 do
9163 {
9164 repeat = 0;
9165 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9166 {
9167 enum elf_ppc64_reloc_type r_type;
9168 unsigned long r_symndx;
9169 asection *sym_sec;
9170 struct elf_link_hash_entry *h;
9171 Elf_Internal_Sym *sym;
9172 bfd_vma val;
9173 enum {no_check, check_lo, check_ha} insn_check;
9174
9175 r_type = ELF64_R_TYPE (rel->r_info);
9176 switch (r_type)
9177 {
9178 default:
9179 insn_check = no_check;
9180 break;
9181
9182 case R_PPC64_GOT_TLSLD16_HA:
9183 case R_PPC64_GOT_TLSGD16_HA:
9184 case R_PPC64_GOT_TPREL16_HA:
9185 case R_PPC64_GOT_DTPREL16_HA:
9186 case R_PPC64_GOT16_HA:
9187 case R_PPC64_TOC16_HA:
9188 insn_check = check_ha;
9189 break;
9190
9191 case R_PPC64_GOT_TLSLD16_LO:
9192 case R_PPC64_GOT_TLSGD16_LO:
9193 case R_PPC64_GOT_TPREL16_LO_DS:
9194 case R_PPC64_GOT_DTPREL16_LO_DS:
9195 case R_PPC64_GOT16_LO:
9196 case R_PPC64_GOT16_LO_DS:
9197 case R_PPC64_TOC16_LO:
9198 case R_PPC64_TOC16_LO_DS:
9199 insn_check = check_lo;
9200 break;
9201 }
9202
9203 if (insn_check != no_check)
9204 {
9205 bfd_vma off = rel->r_offset & ~3;
9206 unsigned char buf[4];
9207 unsigned int insn;
9208
9209 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9210 {
9211 free (used);
9212 goto error_ret;
9213 }
9214 insn = bfd_get_32 (ibfd, buf);
9215 if (insn_check == check_lo
9216 ? !ok_lo_toc_insn (insn, r_type)
9217 : ((insn & ((0x3f << 26) | 0x1f << 16))
9218 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9219 {
9220 char str[12];
9221
9222 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9223 sprintf (str, "%#08x", insn);
9224 info->callbacks->einfo
9225 /* xgettext:c-format */
9226 (_("%H: toc optimization is not supported for"
9227 " %s instruction\n"),
9228 ibfd, sec, rel->r_offset & ~3, str);
9229 }
9230 }
9231
9232 switch (r_type)
9233 {
9234 case R_PPC64_TOC16:
9235 case R_PPC64_TOC16_LO:
9236 case R_PPC64_TOC16_HI:
9237 case R_PPC64_TOC16_HA:
9238 case R_PPC64_TOC16_DS:
9239 case R_PPC64_TOC16_LO_DS:
9240 /* In case we're taking addresses of toc entries. */
9241 case R_PPC64_ADDR64:
9242 break;
9243
9244 default:
9245 continue;
9246 }
9247
9248 r_symndx = ELF64_R_SYM (rel->r_info);
9249 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9250 r_symndx, ibfd))
9251 {
9252 free (used);
9253 goto error_ret;
9254 }
9255
9256 if (sym_sec != toc)
9257 continue;
9258
9259 if (h != NULL)
9260 val = h->root.u.def.value;
9261 else
9262 val = sym->st_value;
9263 val += rel->r_addend;
9264
9265 if (val >= toc->size)
9266 continue;
9267
9268 if ((skip[val >> 3] & can_optimize) != 0)
9269 {
9270 bfd_vma off;
9271 unsigned char opc;
9272
9273 switch (r_type)
9274 {
9275 case R_PPC64_TOC16_HA:
9276 break;
9277
9278 case R_PPC64_TOC16_LO_DS:
9279 off = rel->r_offset;
9280 off += (bfd_big_endian (ibfd) ? -2 : 3);
9281 if (!bfd_get_section_contents (ibfd, sec, &opc,
9282 off, 1))
9283 {
9284 free (used);
9285 goto error_ret;
9286 }
9287 if ((opc & (0x3f << 2)) == (58u << 2))
9288 break;
9289 /* Fall through. */
9290
9291 default:
9292 /* Wrong sort of reloc, or not a ld. We may
9293 as well clear ref_from_discarded too. */
9294 skip[val >> 3] = 0;
9295 }
9296 }
9297
9298 if (sec != toc)
9299 used[val >> 3] = 1;
9300 /* For the toc section, we only mark as used if this
9301 entry itself isn't unused. */
9302 else if ((used[rel->r_offset >> 3]
9303 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9304 && !used[val >> 3])
9305 {
9306 /* Do all the relocs again, to catch reference
9307 chains. */
9308 repeat = 1;
9309 used[val >> 3] = 1;
9310 }
9311 }
9312 }
9313 while (repeat);
9314
9315 if (elf_section_data (sec)->relocs != relstart)
9316 free (relstart);
9317 }
9318
9319 /* Merge the used and skip arrays. Assume that TOC
9320 doublewords not appearing as either used or unused belong
9321 to an entry more than one doubleword in size. */
9322 for (drop = skip, keep = used, last = 0, some_unused = 0;
9323 drop < skip + (toc->size + 7) / 8;
9324 ++drop, ++keep)
9325 {
9326 if (*keep)
9327 {
9328 *drop &= ~ref_from_discarded;
9329 if ((*drop & can_optimize) != 0)
9330 some_unused = 1;
9331 last = 0;
9332 }
9333 else if ((*drop & ref_from_discarded) != 0)
9334 {
9335 some_unused = 1;
9336 last = ref_from_discarded;
9337 }
9338 else
9339 *drop = last;
9340 }
9341
9342 free (used);
9343
9344 if (some_unused)
9345 {
9346 bfd_byte *contents, *src;
9347 unsigned long off;
9348 Elf_Internal_Sym *sym;
9349 bfd_boolean local_toc_syms = FALSE;
9350
9351 /* Shuffle the toc contents, and at the same time convert the
9352 skip array from booleans into offsets. */
9353 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9354 goto error_ret;
9355
9356 elf_section_data (toc)->this_hdr.contents = contents;
9357
9358 for (src = contents, off = 0, drop = skip;
9359 src < contents + toc->size;
9360 src += 8, ++drop)
9361 {
9362 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9363 off += 8;
9364 else if (off != 0)
9365 {
9366 *drop = off;
9367 memcpy (src - off, src, 8);
9368 }
9369 }
9370 *drop = off;
9371 toc->rawsize = toc->size;
9372 toc->size = src - contents - off;
9373
9374 /* Adjust addends for relocs against the toc section sym,
9375 and optimize any accesses we can. */
9376 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9377 {
9378 if (sec->reloc_count == 0
9379 || discarded_section (sec))
9380 continue;
9381
9382 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9383 info->keep_memory);
9384 if (relstart == NULL)
9385 goto error_ret;
9386
9387 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9388 {
9389 enum elf_ppc64_reloc_type r_type;
9390 unsigned long r_symndx;
9391 asection *sym_sec;
9392 struct elf_link_hash_entry *h;
9393 bfd_vma val;
9394
9395 r_type = ELF64_R_TYPE (rel->r_info);
9396 switch (r_type)
9397 {
9398 default:
9399 continue;
9400
9401 case R_PPC64_TOC16:
9402 case R_PPC64_TOC16_LO:
9403 case R_PPC64_TOC16_HI:
9404 case R_PPC64_TOC16_HA:
9405 case R_PPC64_TOC16_DS:
9406 case R_PPC64_TOC16_LO_DS:
9407 case R_PPC64_ADDR64:
9408 break;
9409 }
9410
9411 r_symndx = ELF64_R_SYM (rel->r_info);
9412 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9413 r_symndx, ibfd))
9414 goto error_ret;
9415
9416 if (sym_sec != toc)
9417 continue;
9418
9419 if (h != NULL)
9420 val = h->root.u.def.value;
9421 else
9422 {
9423 val = sym->st_value;
9424 if (val != 0)
9425 local_toc_syms = TRUE;
9426 }
9427
9428 val += rel->r_addend;
9429
9430 if (val > toc->rawsize)
9431 val = toc->rawsize;
9432 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9433 continue;
9434 else if ((skip[val >> 3] & can_optimize) != 0)
9435 {
9436 Elf_Internal_Rela *tocrel
9437 = toc_relocs + (skip[val >> 3] >> 2);
9438 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9439
9440 switch (r_type)
9441 {
9442 case R_PPC64_TOC16_HA:
9443 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9444 break;
9445
9446 case R_PPC64_TOC16_LO_DS:
9447 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9448 break;
9449
9450 default:
9451 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9452 ppc_howto_init ();
9453 info->callbacks->einfo
9454 /* xgettext:c-format */
9455 (_("%H: %s references "
9456 "optimized away TOC entry\n"),
9457 ibfd, sec, rel->r_offset,
9458 ppc64_elf_howto_table[r_type]->name);
9459 bfd_set_error (bfd_error_bad_value);
9460 goto error_ret;
9461 }
9462 rel->r_addend = tocrel->r_addend;
9463 elf_section_data (sec)->relocs = relstart;
9464 continue;
9465 }
9466
9467 if (h != NULL || sym->st_value != 0)
9468 continue;
9469
9470 rel->r_addend -= skip[val >> 3];
9471 elf_section_data (sec)->relocs = relstart;
9472 }
9473
9474 if (elf_section_data (sec)->relocs != relstart)
9475 free (relstart);
9476 }
9477
9478 /* We shouldn't have local or global symbols defined in the TOC,
9479 but handle them anyway. */
9480 if (local_syms != NULL)
9481 for (sym = local_syms;
9482 sym < local_syms + symtab_hdr->sh_info;
9483 ++sym)
9484 if (sym->st_value != 0
9485 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9486 {
9487 unsigned long i;
9488
9489 if (sym->st_value > toc->rawsize)
9490 i = toc->rawsize >> 3;
9491 else
9492 i = sym->st_value >> 3;
9493
9494 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9495 {
9496 if (local_toc_syms)
9497 _bfd_error_handler
9498 (_("%s defined on removed toc entry"),
9499 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9500 do
9501 ++i;
9502 while ((skip[i] & (ref_from_discarded | can_optimize)));
9503 sym->st_value = (bfd_vma) i << 3;
9504 }
9505
9506 sym->st_value -= skip[i];
9507 symtab_hdr->contents = (unsigned char *) local_syms;
9508 }
9509
9510 /* Adjust any global syms defined in this toc input section. */
9511 if (toc_inf.global_toc_syms)
9512 {
9513 toc_inf.toc = toc;
9514 toc_inf.skip = skip;
9515 toc_inf.global_toc_syms = FALSE;
9516 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9517 &toc_inf);
9518 }
9519
9520 if (toc->reloc_count != 0)
9521 {
9522 Elf_Internal_Shdr *rel_hdr;
9523 Elf_Internal_Rela *wrel;
9524 bfd_size_type sz;
9525
9526 /* Remove unused toc relocs, and adjust those we keep. */
9527 if (toc_relocs == NULL)
9528 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9529 info->keep_memory);
9530 if (toc_relocs == NULL)
9531 goto error_ret;
9532
9533 wrel = toc_relocs;
9534 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9535 if ((skip[rel->r_offset >> 3]
9536 & (ref_from_discarded | can_optimize)) == 0)
9537 {
9538 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9539 wrel->r_info = rel->r_info;
9540 wrel->r_addend = rel->r_addend;
9541 ++wrel;
9542 }
9543 else if (!dec_dynrel_count (rel->r_info, toc, info,
9544 &local_syms, NULL, NULL))
9545 goto error_ret;
9546
9547 elf_section_data (toc)->relocs = toc_relocs;
9548 toc->reloc_count = wrel - toc_relocs;
9549 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9550 sz = rel_hdr->sh_entsize;
9551 rel_hdr->sh_size = toc->reloc_count * sz;
9552 }
9553 }
9554 else if (toc_relocs != NULL
9555 && elf_section_data (toc)->relocs != toc_relocs)
9556 free (toc_relocs);
9557
9558 if (local_syms != NULL
9559 && symtab_hdr->contents != (unsigned char *) local_syms)
9560 {
9561 if (!info->keep_memory)
9562 free (local_syms);
9563 else
9564 symtab_hdr->contents = (unsigned char *) local_syms;
9565 }
9566 free (skip);
9567 }
9568
9569 return TRUE;
9570 }
9571
9572 /* Return true iff input section I references the TOC using
9573 instructions limited to +/-32k offsets. */
9574
9575 bfd_boolean
9576 ppc64_elf_has_small_toc_reloc (asection *i)
9577 {
9578 return (is_ppc64_elf (i->owner)
9579 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9580 }
9581
9582 /* Allocate space for one GOT entry. */
9583
9584 static void
9585 allocate_got (struct elf_link_hash_entry *h,
9586 struct bfd_link_info *info,
9587 struct got_entry *gent)
9588 {
9589 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9590 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9591 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9592 ? 16 : 8);
9593 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9594 ? 2 : 1) * sizeof (Elf64_External_Rela);
9595 asection *got = ppc64_elf_tdata (gent->owner)->got;
9596
9597 gent->got.offset = got->size;
9598 got->size += entsize;
9599
9600 if (h->type == STT_GNU_IFUNC)
9601 {
9602 htab->elf.irelplt->size += rentsize;
9603 htab->got_reli_size += rentsize;
9604 }
9605 else if (((bfd_link_pic (info)
9606 && !((gent->tls_type & TLS_TPREL) != 0
9607 && bfd_link_executable (info)
9608 && SYMBOL_REFERENCES_LOCAL (info, h)))
9609 || (htab->elf.dynamic_sections_created
9610 && h->dynindx != -1
9611 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9612 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9613 {
9614 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9615 relgot->size += rentsize;
9616 }
9617 }
9618
9619 /* This function merges got entries in the same toc group. */
9620
9621 static void
9622 merge_got_entries (struct got_entry **pent)
9623 {
9624 struct got_entry *ent, *ent2;
9625
9626 for (ent = *pent; ent != NULL; ent = ent->next)
9627 if (!ent->is_indirect)
9628 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9629 if (!ent2->is_indirect
9630 && ent2->addend == ent->addend
9631 && ent2->tls_type == ent->tls_type
9632 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9633 {
9634 ent2->is_indirect = TRUE;
9635 ent2->got.ent = ent;
9636 }
9637 }
9638
9639 /* If H is undefined, make it dynamic if that makes sense. */
9640
9641 static bfd_boolean
9642 ensure_undef_dynamic (struct bfd_link_info *info,
9643 struct elf_link_hash_entry *h)
9644 {
9645 struct elf_link_hash_table *htab = elf_hash_table (info);
9646
9647 if (htab->dynamic_sections_created
9648 && ((info->dynamic_undefined_weak != 0
9649 && h->root.type == bfd_link_hash_undefweak)
9650 || h->root.type == bfd_link_hash_undefined)
9651 && h->dynindx == -1
9652 && !h->forced_local
9653 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9654 return bfd_elf_link_record_dynamic_symbol (info, h);
9655 return TRUE;
9656 }
9657
9658 /* Allocate space in .plt, .got and associated reloc sections for
9659 dynamic relocs. */
9660
9661 static bfd_boolean
9662 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9663 {
9664 struct bfd_link_info *info;
9665 struct ppc_link_hash_table *htab;
9666 asection *s;
9667 struct ppc_link_hash_entry *eh;
9668 struct got_entry **pgent, *gent;
9669
9670 if (h->root.type == bfd_link_hash_indirect)
9671 return TRUE;
9672
9673 info = (struct bfd_link_info *) inf;
9674 htab = ppc_hash_table (info);
9675 if (htab == NULL)
9676 return FALSE;
9677
9678 eh = (struct ppc_link_hash_entry *) h;
9679 /* Run through the TLS GD got entries first if we're changing them
9680 to TPREL. */
9681 if ((eh->tls_mask & (TLS_TLS | TLS_TPRELGD)) == (TLS_TLS | TLS_TPRELGD))
9682 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9683 if (gent->got.refcount > 0
9684 && (gent->tls_type & TLS_GD) != 0)
9685 {
9686 /* This was a GD entry that has been converted to TPREL. If
9687 there happens to be a TPREL entry we can use that one. */
9688 struct got_entry *ent;
9689 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9690 if (ent->got.refcount > 0
9691 && (ent->tls_type & TLS_TPREL) != 0
9692 && ent->addend == gent->addend
9693 && ent->owner == gent->owner)
9694 {
9695 gent->got.refcount = 0;
9696 break;
9697 }
9698
9699 /* If not, then we'll be using our own TPREL entry. */
9700 if (gent->got.refcount != 0)
9701 gent->tls_type = TLS_TLS | TLS_TPREL;
9702 }
9703
9704 /* Remove any list entry that won't generate a word in the GOT before
9705 we call merge_got_entries. Otherwise we risk merging to empty
9706 entries. */
9707 pgent = &h->got.glist;
9708 while ((gent = *pgent) != NULL)
9709 if (gent->got.refcount > 0)
9710 {
9711 if ((gent->tls_type & TLS_LD) != 0
9712 && !h->def_dynamic)
9713 {
9714 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9715 *pgent = gent->next;
9716 }
9717 else
9718 pgent = &gent->next;
9719 }
9720 else
9721 *pgent = gent->next;
9722
9723 if (!htab->do_multi_toc)
9724 merge_got_entries (&h->got.glist);
9725
9726 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9727 if (!gent->is_indirect)
9728 {
9729 /* Make sure this symbol is output as a dynamic symbol. */
9730 if (!ensure_undef_dynamic (info, h))
9731 return FALSE;
9732
9733 if (!is_ppc64_elf (gent->owner))
9734 abort ();
9735
9736 allocate_got (h, info, gent);
9737 }
9738
9739 /* If no dynamic sections we can't have dynamic relocs, except for
9740 IFUNCs which are handled even in static executables. */
9741 if (!htab->elf.dynamic_sections_created
9742 && h->type != STT_GNU_IFUNC)
9743 eh->dyn_relocs = NULL;
9744
9745 /* Discard relocs on undefined symbols that must be local. */
9746 else if (h->root.type == bfd_link_hash_undefined
9747 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9748 eh->dyn_relocs = NULL;
9749
9750 /* Also discard relocs on undefined weak syms with non-default
9751 visibility, or when dynamic_undefined_weak says so. */
9752 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9753 eh->dyn_relocs = NULL;
9754
9755 if (eh->dyn_relocs != NULL)
9756 {
9757 struct elf_dyn_relocs *p, **pp;
9758
9759 /* In the shared -Bsymbolic case, discard space allocated for
9760 dynamic pc-relative relocs against symbols which turn out to
9761 be defined in regular objects. For the normal shared case,
9762 discard space for relocs that have become local due to symbol
9763 visibility changes. */
9764
9765 if (bfd_link_pic (info))
9766 {
9767 /* Relocs that use pc_count are those that appear on a call
9768 insn, or certain REL relocs (see must_be_dyn_reloc) that
9769 can be generated via assembly. We want calls to
9770 protected symbols to resolve directly to the function
9771 rather than going via the plt. If people want function
9772 pointer comparisons to work as expected then they should
9773 avoid writing weird assembly. */
9774 if (SYMBOL_CALLS_LOCAL (info, h))
9775 {
9776 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9777 {
9778 p->count -= p->pc_count;
9779 p->pc_count = 0;
9780 if (p->count == 0)
9781 *pp = p->next;
9782 else
9783 pp = &p->next;
9784 }
9785 }
9786
9787 if (eh->dyn_relocs != NULL)
9788 {
9789 /* Make sure this symbol is output as a dynamic symbol. */
9790 if (!ensure_undef_dynamic (info, h))
9791 return FALSE;
9792 }
9793 }
9794 else if (ELIMINATE_COPY_RELOCS && h->type != STT_GNU_IFUNC)
9795 {
9796 /* For the non-pic case, discard space for relocs against
9797 symbols which turn out to need copy relocs or are not
9798 dynamic. */
9799 if (h->dynamic_adjusted
9800 && !h->def_regular
9801 && !ELF_COMMON_DEF_P (h))
9802 {
9803 /* Make sure this symbol is output as a dynamic symbol. */
9804 if (!ensure_undef_dynamic (info, h))
9805 return FALSE;
9806
9807 if (h->dynindx == -1)
9808 eh->dyn_relocs = NULL;
9809 }
9810 else
9811 eh->dyn_relocs = NULL;
9812 }
9813
9814 /* Finally, allocate space. */
9815 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9816 {
9817 asection *sreloc = elf_section_data (p->sec)->sreloc;
9818 if (eh->elf.type == STT_GNU_IFUNC)
9819 sreloc = htab->elf.irelplt;
9820 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9821 }
9822 }
9823
9824 if ((htab->elf.dynamic_sections_created
9825 && h->dynindx != -1)
9826 || h->type == STT_GNU_IFUNC)
9827 {
9828 struct plt_entry *pent;
9829 bfd_boolean doneone = FALSE;
9830 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9831 if (pent->plt.refcount > 0)
9832 {
9833 if (!htab->elf.dynamic_sections_created
9834 || h->dynindx == -1)
9835 {
9836 s = htab->elf.iplt;
9837 pent->plt.offset = s->size;
9838 s->size += PLT_ENTRY_SIZE (htab);
9839 s = htab->elf.irelplt;
9840 }
9841 else
9842 {
9843 /* If this is the first .plt entry, make room for the special
9844 first entry. */
9845 s = htab->elf.splt;
9846 if (s->size == 0)
9847 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9848
9849 pent->plt.offset = s->size;
9850
9851 /* Make room for this entry. */
9852 s->size += PLT_ENTRY_SIZE (htab);
9853
9854 /* Make room for the .glink code. */
9855 s = htab->glink;
9856 if (s->size == 0)
9857 s->size += GLINK_PLTRESOLVE_SIZE (htab);
9858 if (htab->opd_abi)
9859 {
9860 /* We need bigger stubs past index 32767. */
9861 if (s->size >= GLINK_PLTRESOLVE_SIZE (htab) + 32768*2*4)
9862 s->size += 4;
9863 s->size += 2*4;
9864 }
9865 else
9866 s->size += 4;
9867
9868 /* We also need to make an entry in the .rela.plt section. */
9869 s = htab->elf.srelplt;
9870 }
9871 s->size += sizeof (Elf64_External_Rela);
9872 doneone = TRUE;
9873 }
9874 else
9875 pent->plt.offset = (bfd_vma) -1;
9876 if (!doneone)
9877 {
9878 h->plt.plist = NULL;
9879 h->needs_plt = 0;
9880 }
9881 }
9882 else
9883 {
9884 h->plt.plist = NULL;
9885 h->needs_plt = 0;
9886 }
9887
9888 return TRUE;
9889 }
9890
9891 #define PPC_LO(v) ((v) & 0xffff)
9892 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9893 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9894
9895 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9896 to set up space for global entry stubs. These are put in glink,
9897 after the branch table. */
9898
9899 static bfd_boolean
9900 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9901 {
9902 struct bfd_link_info *info;
9903 struct ppc_link_hash_table *htab;
9904 struct plt_entry *pent;
9905 asection *s, *plt;
9906
9907 if (h->root.type == bfd_link_hash_indirect)
9908 return TRUE;
9909
9910 if (!h->pointer_equality_needed)
9911 return TRUE;
9912
9913 if (h->def_regular)
9914 return TRUE;
9915
9916 info = inf;
9917 htab = ppc_hash_table (info);
9918 if (htab == NULL)
9919 return FALSE;
9920
9921 s = htab->global_entry;
9922 plt = htab->elf.splt;
9923 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9924 if (pent->plt.offset != (bfd_vma) -1
9925 && pent->addend == 0)
9926 {
9927 /* For ELFv2, if this symbol is not defined in a regular file
9928 and we are not generating a shared library or pie, then we
9929 need to define the symbol in the executable on a call stub.
9930 This is to avoid text relocations. */
9931 bfd_vma off, stub_align, stub_off, stub_size;
9932 unsigned int align_power;
9933
9934 stub_size = 16;
9935 stub_off = s->size;
9936 if (htab->params->plt_stub_align >= 0)
9937 align_power = htab->params->plt_stub_align;
9938 else
9939 align_power = -htab->params->plt_stub_align;
9940 /* Setting section alignment is delayed until we know it is
9941 non-empty. Otherwise the .text output section will be
9942 aligned at least to plt_stub_align even when no global
9943 entry stubs are needed. */
9944 if (s->alignment_power < align_power)
9945 s->alignment_power = align_power;
9946 stub_align = (bfd_vma) 1 << align_power;
9947 if (htab->params->plt_stub_align >= 0
9948 || ((((stub_off + stub_size - 1) & -stub_align)
9949 - (stub_off & -stub_align))
9950 > ((stub_size - 1) & -stub_align)))
9951 stub_off = (stub_off + stub_align - 1) & -stub_align;
9952 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
9953 off -= stub_off + s->output_offset + s->output_section->vma;
9954 /* Note that for --plt-stub-align negative we have a possible
9955 dependency between stub offset and size. Break that
9956 dependency by assuming the max stub size when calculating
9957 the stub offset. */
9958 if (PPC_HA (off) == 0)
9959 stub_size -= 4;
9960 h->root.type = bfd_link_hash_defined;
9961 h->root.u.def.section = s;
9962 h->root.u.def.value = stub_off;
9963 s->size = stub_off + stub_size;
9964 break;
9965 }
9966 return TRUE;
9967 }
9968
9969 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9970 read-only sections. */
9971
9972 static bfd_boolean
9973 maybe_set_textrel (struct elf_link_hash_entry *h, void *inf)
9974 {
9975 asection *sec;
9976
9977 if (h->root.type == bfd_link_hash_indirect)
9978 return TRUE;
9979
9980 sec = readonly_dynrelocs (h);
9981 if (sec != NULL)
9982 {
9983 struct bfd_link_info *info = (struct bfd_link_info *) inf;
9984
9985 info->flags |= DF_TEXTREL;
9986 info->callbacks->minfo
9987 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
9988 sec->owner, h->root.root.string, sec);
9989
9990 /* Not an error, just cut short the traversal. */
9991 return FALSE;
9992 }
9993 return TRUE;
9994 }
9995
9996 /* Set the sizes of the dynamic sections. */
9997
9998 static bfd_boolean
9999 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10000 struct bfd_link_info *info)
10001 {
10002 struct ppc_link_hash_table *htab;
10003 bfd *dynobj;
10004 asection *s;
10005 bfd_boolean relocs;
10006 bfd *ibfd;
10007 struct got_entry *first_tlsld;
10008
10009 htab = ppc_hash_table (info);
10010 if (htab == NULL)
10011 return FALSE;
10012
10013 dynobj = htab->elf.dynobj;
10014 if (dynobj == NULL)
10015 abort ();
10016
10017 if (htab->elf.dynamic_sections_created)
10018 {
10019 /* Set the contents of the .interp section to the interpreter. */
10020 if (bfd_link_executable (info) && !info->nointerp)
10021 {
10022 s = bfd_get_linker_section (dynobj, ".interp");
10023 if (s == NULL)
10024 abort ();
10025 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10026 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10027 }
10028 }
10029
10030 /* Set up .got offsets for local syms, and space for local dynamic
10031 relocs. */
10032 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10033 {
10034 struct got_entry **lgot_ents;
10035 struct got_entry **end_lgot_ents;
10036 struct plt_entry **local_plt;
10037 struct plt_entry **end_local_plt;
10038 unsigned char *lgot_masks;
10039 bfd_size_type locsymcount;
10040 Elf_Internal_Shdr *symtab_hdr;
10041
10042 if (!is_ppc64_elf (ibfd))
10043 continue;
10044
10045 for (s = ibfd->sections; s != NULL; s = s->next)
10046 {
10047 struct ppc_dyn_relocs *p;
10048
10049 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10050 {
10051 if (!bfd_is_abs_section (p->sec)
10052 && bfd_is_abs_section (p->sec->output_section))
10053 {
10054 /* Input section has been discarded, either because
10055 it is a copy of a linkonce section or due to
10056 linker script /DISCARD/, so we'll be discarding
10057 the relocs too. */
10058 }
10059 else if (p->count != 0)
10060 {
10061 asection *srel = elf_section_data (p->sec)->sreloc;
10062 if (p->ifunc)
10063 srel = htab->elf.irelplt;
10064 srel->size += p->count * sizeof (Elf64_External_Rela);
10065 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10066 info->flags |= DF_TEXTREL;
10067 }
10068 }
10069 }
10070
10071 lgot_ents = elf_local_got_ents (ibfd);
10072 if (!lgot_ents)
10073 continue;
10074
10075 symtab_hdr = &elf_symtab_hdr (ibfd);
10076 locsymcount = symtab_hdr->sh_info;
10077 end_lgot_ents = lgot_ents + locsymcount;
10078 local_plt = (struct plt_entry **) end_lgot_ents;
10079 end_local_plt = local_plt + locsymcount;
10080 lgot_masks = (unsigned char *) end_local_plt;
10081 s = ppc64_elf_tdata (ibfd)->got;
10082 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10083 {
10084 struct got_entry **pent, *ent;
10085
10086 pent = lgot_ents;
10087 while ((ent = *pent) != NULL)
10088 if (ent->got.refcount > 0)
10089 {
10090 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10091 {
10092 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10093 *pent = ent->next;
10094 }
10095 else
10096 {
10097 unsigned int ent_size = 8;
10098 unsigned int rel_size = sizeof (Elf64_External_Rela);
10099
10100 ent->got.offset = s->size;
10101 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10102 {
10103 ent_size *= 2;
10104 rel_size *= 2;
10105 }
10106 s->size += ent_size;
10107 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
10108 {
10109 htab->elf.irelplt->size += rel_size;
10110 htab->got_reli_size += rel_size;
10111 }
10112 else if (bfd_link_pic (info)
10113 && !((ent->tls_type & TLS_TPREL) != 0
10114 && bfd_link_executable (info)))
10115 {
10116 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10117 srel->size += rel_size;
10118 }
10119 pent = &ent->next;
10120 }
10121 }
10122 else
10123 *pent = ent->next;
10124 }
10125
10126 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10127 for (; local_plt < end_local_plt; ++local_plt)
10128 {
10129 struct plt_entry *ent;
10130
10131 for (ent = *local_plt; ent != NULL; ent = ent->next)
10132 if (ent->plt.refcount > 0)
10133 {
10134 s = htab->elf.iplt;
10135 ent->plt.offset = s->size;
10136 s->size += PLT_ENTRY_SIZE (htab);
10137
10138 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10139 }
10140 else
10141 ent->plt.offset = (bfd_vma) -1;
10142 }
10143 }
10144
10145 /* Allocate global sym .plt and .got entries, and space for global
10146 sym dynamic relocs. */
10147 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10148
10149 if (!htab->opd_abi && !bfd_link_pic (info))
10150 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10151
10152 first_tlsld = NULL;
10153 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10154 {
10155 struct got_entry *ent;
10156
10157 if (!is_ppc64_elf (ibfd))
10158 continue;
10159
10160 ent = ppc64_tlsld_got (ibfd);
10161 if (ent->got.refcount > 0)
10162 {
10163 if (!htab->do_multi_toc && first_tlsld != NULL)
10164 {
10165 ent->is_indirect = TRUE;
10166 ent->got.ent = first_tlsld;
10167 }
10168 else
10169 {
10170 if (first_tlsld == NULL)
10171 first_tlsld = ent;
10172 s = ppc64_elf_tdata (ibfd)->got;
10173 ent->got.offset = s->size;
10174 ent->owner = ibfd;
10175 s->size += 16;
10176 if (bfd_link_pic (info))
10177 {
10178 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10179 srel->size += sizeof (Elf64_External_Rela);
10180 }
10181 }
10182 }
10183 else
10184 ent->got.offset = (bfd_vma) -1;
10185 }
10186
10187 /* We now have determined the sizes of the various dynamic sections.
10188 Allocate memory for them. */
10189 relocs = FALSE;
10190 for (s = dynobj->sections; s != NULL; s = s->next)
10191 {
10192 if ((s->flags & SEC_LINKER_CREATED) == 0)
10193 continue;
10194
10195 if (s == htab->brlt || s == htab->relbrlt)
10196 /* These haven't been allocated yet; don't strip. */
10197 continue;
10198 else if (s == htab->elf.sgot
10199 || s == htab->elf.splt
10200 || s == htab->elf.iplt
10201 || s == htab->glink
10202 || s == htab->global_entry
10203 || s == htab->elf.sdynbss
10204 || s == htab->elf.sdynrelro)
10205 {
10206 /* Strip this section if we don't need it; see the
10207 comment below. */
10208 }
10209 else if (s == htab->glink_eh_frame)
10210 {
10211 if (!bfd_is_abs_section (s->output_section))
10212 /* Not sized yet. */
10213 continue;
10214 }
10215 else if (CONST_STRNEQ (s->name, ".rela"))
10216 {
10217 if (s->size != 0)
10218 {
10219 if (s != htab->elf.srelplt)
10220 relocs = TRUE;
10221
10222 /* We use the reloc_count field as a counter if we need
10223 to copy relocs into the output file. */
10224 s->reloc_count = 0;
10225 }
10226 }
10227 else
10228 {
10229 /* It's not one of our sections, so don't allocate space. */
10230 continue;
10231 }
10232
10233 if (s->size == 0)
10234 {
10235 /* If we don't need this section, strip it from the
10236 output file. This is mostly to handle .rela.bss and
10237 .rela.plt. We must create both sections in
10238 create_dynamic_sections, because they must be created
10239 before the linker maps input sections to output
10240 sections. The linker does that before
10241 adjust_dynamic_symbol is called, and it is that
10242 function which decides whether anything needs to go
10243 into these sections. */
10244 s->flags |= SEC_EXCLUDE;
10245 continue;
10246 }
10247
10248 if (bfd_is_abs_section (s->output_section))
10249 _bfd_error_handler (_("warning: discarding dynamic section %s"),
10250 s->name);
10251
10252 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10253 continue;
10254
10255 /* Allocate memory for the section contents. We use bfd_zalloc
10256 here in case unused entries are not reclaimed before the
10257 section's contents are written out. This should not happen,
10258 but this way if it does we get a R_PPC64_NONE reloc in .rela
10259 sections instead of garbage.
10260 We also rely on the section contents being zero when writing
10261 the GOT and .dynrelro. */
10262 s->contents = bfd_zalloc (dynobj, s->size);
10263 if (s->contents == NULL)
10264 return FALSE;
10265 }
10266
10267 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10268 {
10269 if (!is_ppc64_elf (ibfd))
10270 continue;
10271
10272 s = ppc64_elf_tdata (ibfd)->got;
10273 if (s != NULL && s != htab->elf.sgot)
10274 {
10275 if (s->size == 0)
10276 s->flags |= SEC_EXCLUDE;
10277 else
10278 {
10279 s->contents = bfd_zalloc (ibfd, s->size);
10280 if (s->contents == NULL)
10281 return FALSE;
10282 }
10283 }
10284 s = ppc64_elf_tdata (ibfd)->relgot;
10285 if (s != NULL)
10286 {
10287 if (s->size == 0)
10288 s->flags |= SEC_EXCLUDE;
10289 else
10290 {
10291 s->contents = bfd_zalloc (ibfd, s->size);
10292 if (s->contents == NULL)
10293 return FALSE;
10294 relocs = TRUE;
10295 s->reloc_count = 0;
10296 }
10297 }
10298 }
10299
10300 if (htab->elf.dynamic_sections_created)
10301 {
10302 bfd_boolean tls_opt;
10303
10304 /* Add some entries to the .dynamic section. We fill in the
10305 values later, in ppc64_elf_finish_dynamic_sections, but we
10306 must add the entries now so that we get the correct size for
10307 the .dynamic section. The DT_DEBUG entry is filled in by the
10308 dynamic linker and used by the debugger. */
10309 #define add_dynamic_entry(TAG, VAL) \
10310 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10311
10312 if (bfd_link_executable (info))
10313 {
10314 if (!add_dynamic_entry (DT_DEBUG, 0))
10315 return FALSE;
10316 }
10317
10318 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10319 {
10320 if (!add_dynamic_entry (DT_PLTGOT, 0)
10321 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10322 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10323 || !add_dynamic_entry (DT_JMPREL, 0)
10324 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10325 return FALSE;
10326 }
10327
10328 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10329 {
10330 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10331 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10332 return FALSE;
10333 }
10334
10335 tls_opt = (htab->params->tls_get_addr_opt
10336 && htab->tls_get_addr_fd != NULL
10337 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10338 if (tls_opt || !htab->opd_abi)
10339 {
10340 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10341 return FALSE;
10342 }
10343
10344 if (relocs)
10345 {
10346 if (!add_dynamic_entry (DT_RELA, 0)
10347 || !add_dynamic_entry (DT_RELASZ, 0)
10348 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10349 return FALSE;
10350
10351 /* If any dynamic relocs apply to a read-only section,
10352 then we need a DT_TEXTREL entry. */
10353 if ((info->flags & DF_TEXTREL) == 0)
10354 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10355
10356 if ((info->flags & DF_TEXTREL) != 0)
10357 {
10358 if (!add_dynamic_entry (DT_TEXTREL, 0))
10359 return FALSE;
10360 }
10361 }
10362 }
10363 #undef add_dynamic_entry
10364
10365 return TRUE;
10366 }
10367
10368 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10369
10370 static bfd_boolean
10371 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10372 {
10373 if (h->plt.plist != NULL
10374 && !h->def_regular
10375 && !h->pointer_equality_needed)
10376 return FALSE;
10377
10378 return _bfd_elf_hash_symbol (h);
10379 }
10380
10381 /* Determine the type of stub needed, if any, for a call. */
10382
10383 static inline enum ppc_stub_type
10384 ppc_type_of_stub (asection *input_sec,
10385 const Elf_Internal_Rela *rel,
10386 struct ppc_link_hash_entry **hash,
10387 struct plt_entry **plt_ent,
10388 bfd_vma destination,
10389 unsigned long local_off)
10390 {
10391 struct ppc_link_hash_entry *h = *hash;
10392 bfd_vma location;
10393 bfd_vma branch_offset;
10394 bfd_vma max_branch_offset;
10395 enum elf_ppc64_reloc_type r_type;
10396
10397 if (h != NULL)
10398 {
10399 struct plt_entry *ent;
10400 struct ppc_link_hash_entry *fdh = h;
10401 if (h->oh != NULL
10402 && h->oh->is_func_descriptor)
10403 {
10404 fdh = ppc_follow_link (h->oh);
10405 *hash = fdh;
10406 }
10407
10408 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10409 if (ent->addend == rel->r_addend
10410 && ent->plt.offset != (bfd_vma) -1)
10411 {
10412 *plt_ent = ent;
10413 return ppc_stub_plt_call;
10414 }
10415
10416 /* Here, we know we don't have a plt entry. If we don't have a
10417 either a defined function descriptor or a defined entry symbol
10418 in a regular object file, then it is pointless trying to make
10419 any other type of stub. */
10420 if (!is_static_defined (&fdh->elf)
10421 && !is_static_defined (&h->elf))
10422 return ppc_stub_none;
10423 }
10424 else if (elf_local_got_ents (input_sec->owner) != NULL)
10425 {
10426 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10427 struct plt_entry **local_plt = (struct plt_entry **)
10428 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10429 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10430
10431 if (local_plt[r_symndx] != NULL)
10432 {
10433 struct plt_entry *ent;
10434
10435 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10436 if (ent->addend == rel->r_addend
10437 && ent->plt.offset != (bfd_vma) -1)
10438 {
10439 *plt_ent = ent;
10440 return ppc_stub_plt_call;
10441 }
10442 }
10443 }
10444
10445 /* Determine where the call point is. */
10446 location = (input_sec->output_offset
10447 + input_sec->output_section->vma
10448 + rel->r_offset);
10449
10450 branch_offset = destination - location;
10451 r_type = ELF64_R_TYPE (rel->r_info);
10452
10453 /* Determine if a long branch stub is needed. */
10454 max_branch_offset = 1 << 25;
10455 if (r_type != R_PPC64_REL24)
10456 max_branch_offset = 1 << 15;
10457
10458 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10459 /* We need a stub. Figure out whether a long_branch or plt_branch
10460 is needed later. */
10461 return ppc_stub_long_branch;
10462
10463 return ppc_stub_none;
10464 }
10465
10466 /* With power7 weakly ordered memory model, it is possible for ld.so
10467 to update a plt entry in one thread and have another thread see a
10468 stale zero toc entry. To avoid this we need some sort of acquire
10469 barrier in the call stub. One solution is to make the load of the
10470 toc word seem to appear to depend on the load of the function entry
10471 word. Another solution is to test for r2 being zero, and branch to
10472 the appropriate glink entry if so.
10473
10474 . fake dep barrier compare
10475 . ld 12,xxx(2) ld 12,xxx(2)
10476 . mtctr 12 mtctr 12
10477 . xor 11,12,12 ld 2,xxx+8(2)
10478 . add 2,2,11 cmpldi 2,0
10479 . ld 2,xxx+8(2) bnectr+
10480 . bctr b <glink_entry>
10481
10482 The solution involving the compare turns out to be faster, so
10483 that's what we use unless the branch won't reach. */
10484
10485 #define ALWAYS_USE_FAKE_DEP 0
10486 #define ALWAYS_EMIT_R2SAVE 0
10487
10488 static inline unsigned int
10489 plt_stub_size (struct ppc_link_hash_table *htab,
10490 struct ppc_stub_hash_entry *stub_entry,
10491 bfd_vma off)
10492 {
10493 unsigned size = 12;
10494
10495 if (ALWAYS_EMIT_R2SAVE
10496 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10497 size += 4;
10498 if (PPC_HA (off) != 0)
10499 size += 4;
10500 if (htab->opd_abi)
10501 {
10502 size += 4;
10503 if (htab->params->plt_static_chain)
10504 size += 4;
10505 if (htab->params->plt_thread_safe
10506 && htab->elf.dynamic_sections_created
10507 && stub_entry->h != NULL
10508 && stub_entry->h->elf.dynindx != -1)
10509 size += 8;
10510 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10511 size += 4;
10512 }
10513 if (stub_entry->h != NULL
10514 && (stub_entry->h == htab->tls_get_addr_fd
10515 || stub_entry->h == htab->tls_get_addr)
10516 && htab->params->tls_get_addr_opt)
10517 {
10518 size += 7 * 4;
10519 if (ALWAYS_EMIT_R2SAVE
10520 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10521 size += 6 * 4;
10522 }
10523 return size;
10524 }
10525
10526 /* Depending on the sign of plt_stub_align:
10527 If positive, return the padding to align to a 2**plt_stub_align
10528 boundary.
10529 If negative, if this stub would cross fewer 2**plt_stub_align
10530 boundaries if we align, then return the padding needed to do so. */
10531
10532 static inline unsigned int
10533 plt_stub_pad (struct ppc_link_hash_table *htab,
10534 struct ppc_stub_hash_entry *stub_entry,
10535 bfd_vma plt_off)
10536 {
10537 int stub_align;
10538 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10539 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10540
10541 if (htab->params->plt_stub_align >= 0)
10542 {
10543 stub_align = 1 << htab->params->plt_stub_align;
10544 if ((stub_off & (stub_align - 1)) != 0)
10545 return stub_align - (stub_off & (stub_align - 1));
10546 return 0;
10547 }
10548
10549 stub_align = 1 << -htab->params->plt_stub_align;
10550 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10551 > ((stub_size - 1) & -stub_align))
10552 return stub_align - (stub_off & (stub_align - 1));
10553 return 0;
10554 }
10555
10556 /* Build a .plt call stub. */
10557
10558 static inline bfd_byte *
10559 build_plt_stub (struct ppc_link_hash_table *htab,
10560 struct ppc_stub_hash_entry *stub_entry,
10561 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10562 {
10563 bfd *obfd = htab->params->stub_bfd;
10564 bfd_boolean plt_load_toc = htab->opd_abi;
10565 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10566 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10567 && htab->elf.dynamic_sections_created
10568 && stub_entry->h != NULL
10569 && stub_entry->h->elf.dynindx != -1);
10570 bfd_boolean use_fake_dep = plt_thread_safe;
10571 bfd_vma cmp_branch_off = 0;
10572
10573 if (!ALWAYS_USE_FAKE_DEP
10574 && plt_load_toc
10575 && plt_thread_safe
10576 && !((stub_entry->h == htab->tls_get_addr_fd
10577 || stub_entry->h == htab->tls_get_addr)
10578 && htab->params->tls_get_addr_opt))
10579 {
10580 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10581 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10582 / PLT_ENTRY_SIZE (htab));
10583 bfd_vma glinkoff = GLINK_PLTRESOLVE_SIZE (htab) + pltindex * 8;
10584 bfd_vma to, from;
10585
10586 if (pltindex > 32768)
10587 glinkoff += (pltindex - 32768) * 4;
10588 to = (glinkoff
10589 + htab->glink->output_offset
10590 + htab->glink->output_section->vma);
10591 from = (p - stub_entry->group->stub_sec->contents
10592 + 4 * (ALWAYS_EMIT_R2SAVE
10593 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10594 + 4 * (PPC_HA (offset) != 0)
10595 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10596 != PPC_HA (offset))
10597 + 4 * (plt_static_chain != 0)
10598 + 20
10599 + stub_entry->group->stub_sec->output_offset
10600 + stub_entry->group->stub_sec->output_section->vma);
10601 cmp_branch_off = to - from;
10602 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10603 }
10604
10605 if (PPC_HA (offset) != 0)
10606 {
10607 if (r != NULL)
10608 {
10609 if (ALWAYS_EMIT_R2SAVE
10610 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10611 r[0].r_offset += 4;
10612 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10613 r[1].r_offset = r[0].r_offset + 4;
10614 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10615 r[1].r_addend = r[0].r_addend;
10616 if (plt_load_toc)
10617 {
10618 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10619 {
10620 r[2].r_offset = r[1].r_offset + 4;
10621 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10622 r[2].r_addend = r[0].r_addend;
10623 }
10624 else
10625 {
10626 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10627 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10628 r[2].r_addend = r[0].r_addend + 8;
10629 if (plt_static_chain)
10630 {
10631 r[3].r_offset = r[2].r_offset + 4;
10632 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10633 r[3].r_addend = r[0].r_addend + 16;
10634 }
10635 }
10636 }
10637 }
10638 if (ALWAYS_EMIT_R2SAVE
10639 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10640 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10641 if (plt_load_toc)
10642 {
10643 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10644 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10645 }
10646 else
10647 {
10648 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10649 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10650 }
10651 if (plt_load_toc
10652 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10653 {
10654 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10655 offset = 0;
10656 }
10657 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10658 if (plt_load_toc)
10659 {
10660 if (use_fake_dep)
10661 {
10662 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10663 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10664 }
10665 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10666 if (plt_static_chain)
10667 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10668 }
10669 }
10670 else
10671 {
10672 if (r != NULL)
10673 {
10674 if (ALWAYS_EMIT_R2SAVE
10675 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10676 r[0].r_offset += 4;
10677 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10678 if (plt_load_toc)
10679 {
10680 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10681 {
10682 r[1].r_offset = r[0].r_offset + 4;
10683 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10684 r[1].r_addend = r[0].r_addend;
10685 }
10686 else
10687 {
10688 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10689 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10690 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10691 if (plt_static_chain)
10692 {
10693 r[2].r_offset = r[1].r_offset + 4;
10694 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10695 r[2].r_addend = r[0].r_addend + 8;
10696 }
10697 }
10698 }
10699 }
10700 if (ALWAYS_EMIT_R2SAVE
10701 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10702 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10703 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10704 if (plt_load_toc
10705 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10706 {
10707 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10708 offset = 0;
10709 }
10710 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10711 if (plt_load_toc)
10712 {
10713 if (use_fake_dep)
10714 {
10715 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10716 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10717 }
10718 if (plt_static_chain)
10719 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10720 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10721 }
10722 }
10723 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10724 {
10725 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10726 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10727 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10728 }
10729 else
10730 bfd_put_32 (obfd, BCTR, p), p += 4;
10731 return p;
10732 }
10733
10734 /* Build a special .plt call stub for __tls_get_addr. */
10735
10736 #define LD_R11_0R3 0xe9630000
10737 #define LD_R12_0R3 0xe9830000
10738 #define MR_R0_R3 0x7c601b78
10739 #define CMPDI_R11_0 0x2c2b0000
10740 #define ADD_R3_R12_R13 0x7c6c6a14
10741 #define BEQLR 0x4d820020
10742 #define MR_R3_R0 0x7c030378
10743 #define STD_R11_0R1 0xf9610000
10744 #define BCTRL 0x4e800421
10745 #define LD_R11_0R1 0xe9610000
10746 #define MTLR_R11 0x7d6803a6
10747
10748 static inline bfd_byte *
10749 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10750 struct ppc_stub_hash_entry *stub_entry,
10751 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10752 {
10753 bfd *obfd = htab->params->stub_bfd;
10754
10755 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10756 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10757 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10758 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10759 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10760 bfd_put_32 (obfd, BEQLR, p), p += 4;
10761 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10762 if (r != NULL)
10763 r[0].r_offset += 7 * 4;
10764 if (!ALWAYS_EMIT_R2SAVE
10765 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10766 return build_plt_stub (htab, stub_entry, p, offset, r);
10767
10768 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10769 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10770
10771 if (r != NULL)
10772 r[0].r_offset += 2 * 4;
10773 p = build_plt_stub (htab, stub_entry, p, offset, r);
10774 bfd_put_32 (obfd, BCTRL, p - 4);
10775
10776 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10777 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10778 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10779 bfd_put_32 (obfd, BLR, p), p += 4;
10780
10781 return p;
10782 }
10783
10784 static Elf_Internal_Rela *
10785 get_relocs (asection *sec, int count)
10786 {
10787 Elf_Internal_Rela *relocs;
10788 struct bfd_elf_section_data *elfsec_data;
10789
10790 elfsec_data = elf_section_data (sec);
10791 relocs = elfsec_data->relocs;
10792 if (relocs == NULL)
10793 {
10794 bfd_size_type relsize;
10795 relsize = sec->reloc_count * sizeof (*relocs);
10796 relocs = bfd_alloc (sec->owner, relsize);
10797 if (relocs == NULL)
10798 return NULL;
10799 elfsec_data->relocs = relocs;
10800 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10801 sizeof (Elf_Internal_Shdr));
10802 if (elfsec_data->rela.hdr == NULL)
10803 return NULL;
10804 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10805 * sizeof (Elf64_External_Rela));
10806 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10807 sec->reloc_count = 0;
10808 }
10809 relocs += sec->reloc_count;
10810 sec->reloc_count += count;
10811 return relocs;
10812 }
10813
10814 static bfd_vma
10815 get_r2off (struct bfd_link_info *info,
10816 struct ppc_stub_hash_entry *stub_entry)
10817 {
10818 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10819 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10820
10821 if (r2off == 0)
10822 {
10823 /* Support linking -R objects. Get the toc pointer from the
10824 opd entry. */
10825 char buf[8];
10826 if (!htab->opd_abi)
10827 return r2off;
10828 asection *opd = stub_entry->h->elf.root.u.def.section;
10829 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10830
10831 if (strcmp (opd->name, ".opd") != 0
10832 || opd->reloc_count != 0)
10833 {
10834 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%pT'\n"),
10835 stub_entry->h->elf.root.root.string);
10836 bfd_set_error (bfd_error_bad_value);
10837 return (bfd_vma) -1;
10838 }
10839 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10840 return (bfd_vma) -1;
10841 r2off = bfd_get_64 (opd->owner, buf);
10842 r2off -= elf_gp (info->output_bfd);
10843 }
10844 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10845 return r2off;
10846 }
10847
10848 static bfd_boolean
10849 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10850 {
10851 struct ppc_stub_hash_entry *stub_entry;
10852 struct ppc_branch_hash_entry *br_entry;
10853 struct bfd_link_info *info;
10854 struct ppc_link_hash_table *htab;
10855 bfd_byte *loc;
10856 bfd_byte *p;
10857 bfd_vma dest, off;
10858 Elf_Internal_Rela *r;
10859 asection *plt;
10860
10861 /* Massage our args to the form they really have. */
10862 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10863 info = in_arg;
10864
10865 htab = ppc_hash_table (info);
10866 if (htab == NULL)
10867 return FALSE;
10868
10869 /* Make a note of the offset within the stubs for this entry. */
10870 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10871 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10872
10873 htab->stub_count[stub_entry->stub_type - 1] += 1;
10874 switch (stub_entry->stub_type)
10875 {
10876 case ppc_stub_long_branch:
10877 case ppc_stub_long_branch_r2off:
10878 /* Branches are relative. This is where we are going to. */
10879 dest = (stub_entry->target_value
10880 + stub_entry->target_section->output_offset
10881 + stub_entry->target_section->output_section->vma);
10882 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10883 off = dest;
10884
10885 /* And this is where we are coming from. */
10886 off -= (stub_entry->stub_offset
10887 + stub_entry->group->stub_sec->output_offset
10888 + stub_entry->group->stub_sec->output_section->vma);
10889
10890 p = loc;
10891 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10892 {
10893 bfd_vma r2off = get_r2off (info, stub_entry);
10894
10895 if (r2off == (bfd_vma) -1)
10896 {
10897 htab->stub_error = TRUE;
10898 return FALSE;
10899 }
10900 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
10901 p += 4;
10902 if (PPC_HA (r2off) != 0)
10903 {
10904 bfd_put_32 (htab->params->stub_bfd,
10905 ADDIS_R2_R2 | PPC_HA (r2off), p);
10906 p += 4;
10907 }
10908 if (PPC_LO (r2off) != 0)
10909 {
10910 bfd_put_32 (htab->params->stub_bfd,
10911 ADDI_R2_R2 | PPC_LO (r2off), p);
10912 p += 4;
10913 }
10914 off -= p - loc;
10915 }
10916 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), p);
10917 p += 4;
10918
10919 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10920 {
10921 _bfd_error_handler
10922 (_("long branch stub `%s' offset overflow"),
10923 stub_entry->root.string);
10924 htab->stub_error = TRUE;
10925 return FALSE;
10926 }
10927
10928 if (info->emitrelocations)
10929 {
10930 r = get_relocs (stub_entry->group->stub_sec, 1);
10931 if (r == NULL)
10932 return FALSE;
10933 r->r_offset = p - 4 - stub_entry->group->stub_sec->contents;
10934 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10935 r->r_addend = dest;
10936 if (stub_entry->h != NULL)
10937 {
10938 struct elf_link_hash_entry **hashes;
10939 unsigned long symndx;
10940 struct ppc_link_hash_entry *h;
10941
10942 hashes = elf_sym_hashes (htab->params->stub_bfd);
10943 if (hashes == NULL)
10944 {
10945 bfd_size_type hsize;
10946
10947 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10948 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10949 if (hashes == NULL)
10950 return FALSE;
10951 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10952 htab->stub_globals = 1;
10953 }
10954 symndx = htab->stub_globals++;
10955 h = stub_entry->h;
10956 hashes[symndx] = &h->elf;
10957 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10958 if (h->oh != NULL && h->oh->is_func)
10959 h = ppc_follow_link (h->oh);
10960 if (h->elf.root.u.def.section != stub_entry->target_section)
10961 /* H is an opd symbol. The addend must be zero. */
10962 r->r_addend = 0;
10963 else
10964 {
10965 off = (h->elf.root.u.def.value
10966 + h->elf.root.u.def.section->output_offset
10967 + h->elf.root.u.def.section->output_section->vma);
10968 r->r_addend -= off;
10969 }
10970 }
10971 }
10972 break;
10973
10974 case ppc_stub_plt_branch:
10975 case ppc_stub_plt_branch_r2off:
10976 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10977 stub_entry->root.string + 9,
10978 FALSE, FALSE);
10979 if (br_entry == NULL)
10980 {
10981 _bfd_error_handler (_("can't find branch stub `%s'"),
10982 stub_entry->root.string);
10983 htab->stub_error = TRUE;
10984 return FALSE;
10985 }
10986
10987 dest = (stub_entry->target_value
10988 + stub_entry->target_section->output_offset
10989 + stub_entry->target_section->output_section->vma);
10990 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10991 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10992
10993 bfd_put_64 (htab->brlt->owner, dest,
10994 htab->brlt->contents + br_entry->offset);
10995
10996 if (br_entry->iter == htab->stub_iteration)
10997 {
10998 br_entry->iter = 0;
10999
11000 if (htab->relbrlt != NULL)
11001 {
11002 /* Create a reloc for the branch lookup table entry. */
11003 Elf_Internal_Rela rela;
11004 bfd_byte *rl;
11005
11006 rela.r_offset = (br_entry->offset
11007 + htab->brlt->output_offset
11008 + htab->brlt->output_section->vma);
11009 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11010 rela.r_addend = dest;
11011
11012 rl = htab->relbrlt->contents;
11013 rl += (htab->relbrlt->reloc_count++
11014 * sizeof (Elf64_External_Rela));
11015 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11016 }
11017 else if (info->emitrelocations)
11018 {
11019 r = get_relocs (htab->brlt, 1);
11020 if (r == NULL)
11021 return FALSE;
11022 /* brlt, being SEC_LINKER_CREATED does not go through the
11023 normal reloc processing. Symbols and offsets are not
11024 translated from input file to output file form, so
11025 set up the offset per the output file. */
11026 r->r_offset = (br_entry->offset
11027 + htab->brlt->output_offset
11028 + htab->brlt->output_section->vma);
11029 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11030 r->r_addend = dest;
11031 }
11032 }
11033
11034 dest = (br_entry->offset
11035 + htab->brlt->output_offset
11036 + htab->brlt->output_section->vma);
11037
11038 off = (dest
11039 - elf_gp (info->output_bfd)
11040 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11041
11042 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11043 {
11044 info->callbacks->einfo
11045 (_("%P: linkage table error against `%pT'\n"),
11046 stub_entry->root.string);
11047 bfd_set_error (bfd_error_bad_value);
11048 htab->stub_error = TRUE;
11049 return FALSE;
11050 }
11051
11052 if (info->emitrelocations)
11053 {
11054 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11055 if (r == NULL)
11056 return FALSE;
11057 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11058 if (bfd_big_endian (info->output_bfd))
11059 r[0].r_offset += 2;
11060 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11061 r[0].r_offset += 4;
11062 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11063 r[0].r_addend = dest;
11064 if (PPC_HA (off) != 0)
11065 {
11066 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11067 r[1].r_offset = r[0].r_offset + 4;
11068 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11069 r[1].r_addend = r[0].r_addend;
11070 }
11071 }
11072
11073 p = loc;
11074 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11075 {
11076 if (PPC_HA (off) != 0)
11077 {
11078 bfd_put_32 (htab->params->stub_bfd,
11079 ADDIS_R12_R2 | PPC_HA (off), p);
11080 p += 4;
11081 bfd_put_32 (htab->params->stub_bfd,
11082 LD_R12_0R12 | PPC_LO (off), p);
11083 }
11084 else
11085 bfd_put_32 (htab->params->stub_bfd,
11086 LD_R12_0R2 | PPC_LO (off), p);
11087 }
11088 else
11089 {
11090 bfd_vma r2off = get_r2off (info, stub_entry);
11091
11092 if (r2off == (bfd_vma) -1)
11093 {
11094 htab->stub_error = TRUE;
11095 return FALSE;
11096 }
11097
11098 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
11099 p += 4;
11100 if (PPC_HA (off) != 0)
11101 {
11102 bfd_put_32 (htab->params->stub_bfd,
11103 ADDIS_R12_R2 | PPC_HA (off), p);
11104 p += 4;
11105 bfd_put_32 (htab->params->stub_bfd,
11106 LD_R12_0R12 | PPC_LO (off), p);
11107 }
11108 else
11109 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), p);
11110
11111 if (PPC_HA (r2off) != 0)
11112 {
11113 p += 4;
11114 bfd_put_32 (htab->params->stub_bfd,
11115 ADDIS_R2_R2 | PPC_HA (r2off), p);
11116 }
11117 if (PPC_LO (r2off) != 0)
11118 {
11119 p += 4;
11120 bfd_put_32 (htab->params->stub_bfd,
11121 ADDI_R2_R2 | PPC_LO (r2off), p);
11122 }
11123 }
11124 p += 4;
11125 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, p);
11126 p += 4;
11127 bfd_put_32 (htab->params->stub_bfd, BCTR, p);
11128 p += 4;
11129 break;
11130
11131 case ppc_stub_plt_call:
11132 case ppc_stub_plt_call_r2save:
11133 if (stub_entry->h != NULL
11134 && stub_entry->h->is_func_descriptor
11135 && stub_entry->h->oh != NULL)
11136 {
11137 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11138
11139 /* If the old-ABI "dot-symbol" is undefined make it weak so
11140 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11141 if (fh->elf.root.type == bfd_link_hash_undefined
11142 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11143 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11144 fh->elf.root.type = bfd_link_hash_undefweak;
11145 }
11146
11147 /* Now build the stub. */
11148 dest = stub_entry->plt_ent->plt.offset & ~1;
11149 if (dest >= (bfd_vma) -2)
11150 abort ();
11151
11152 plt = htab->elf.splt;
11153 if (!htab->elf.dynamic_sections_created
11154 || stub_entry->h == NULL
11155 || stub_entry->h->elf.dynindx == -1)
11156 plt = htab->elf.iplt;
11157
11158 dest += plt->output_offset + plt->output_section->vma;
11159
11160 if (stub_entry->h == NULL
11161 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11162 {
11163 Elf_Internal_Rela rela;
11164 bfd_byte *rl;
11165
11166 rela.r_offset = dest;
11167 if (htab->opd_abi)
11168 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11169 else
11170 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11171 rela.r_addend = (stub_entry->target_value
11172 + stub_entry->target_section->output_offset
11173 + stub_entry->target_section->output_section->vma);
11174
11175 rl = (htab->elf.irelplt->contents
11176 + (htab->elf.irelplt->reloc_count++
11177 * sizeof (Elf64_External_Rela)));
11178 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11179 stub_entry->plt_ent->plt.offset |= 1;
11180 htab->local_ifunc_resolver = 1;
11181 }
11182
11183 off = (dest
11184 - elf_gp (info->output_bfd)
11185 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11186
11187 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11188 {
11189 info->callbacks->einfo
11190 /* xgettext:c-format */
11191 (_("%P: linkage table error against `%pT'\n"),
11192 stub_entry->h != NULL
11193 ? stub_entry->h->elf.root.root.string
11194 : "<local sym>");
11195 bfd_set_error (bfd_error_bad_value);
11196 htab->stub_error = TRUE;
11197 return FALSE;
11198 }
11199
11200 if (htab->params->plt_stub_align != 0)
11201 {
11202 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11203
11204 stub_entry->group->stub_sec->size += pad;
11205 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11206 loc += pad;
11207 }
11208
11209 r = NULL;
11210 if (info->emitrelocations)
11211 {
11212 r = get_relocs (stub_entry->group->stub_sec,
11213 ((PPC_HA (off) != 0)
11214 + (htab->opd_abi
11215 ? 2 + (htab->params->plt_static_chain
11216 && PPC_HA (off + 16) == PPC_HA (off))
11217 : 1)));
11218 if (r == NULL)
11219 return FALSE;
11220 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11221 if (bfd_big_endian (info->output_bfd))
11222 r[0].r_offset += 2;
11223 r[0].r_addend = dest;
11224 }
11225 if (stub_entry->h != NULL
11226 && (stub_entry->h == htab->tls_get_addr_fd
11227 || stub_entry->h == htab->tls_get_addr)
11228 && htab->params->tls_get_addr_opt)
11229 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11230 else
11231 p = build_plt_stub (htab, stub_entry, loc, off, r);
11232 break;
11233
11234 case ppc_stub_save_res:
11235 return TRUE;
11236
11237 default:
11238 BFD_FAIL ();
11239 return FALSE;
11240 }
11241
11242 stub_entry->group->stub_sec->size += p - loc;
11243
11244 if (htab->params->emit_stub_syms)
11245 {
11246 struct elf_link_hash_entry *h;
11247 size_t len1, len2;
11248 char *name;
11249 const char *const stub_str[] = { "long_branch",
11250 "long_branch_r2off",
11251 "plt_branch",
11252 "plt_branch_r2off",
11253 "plt_call",
11254 "plt_call" };
11255
11256 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11257 len2 = strlen (stub_entry->root.string);
11258 name = bfd_malloc (len1 + len2 + 2);
11259 if (name == NULL)
11260 return FALSE;
11261 memcpy (name, stub_entry->root.string, 9);
11262 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11263 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11264 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11265 if (h == NULL)
11266 return FALSE;
11267 if (h->root.type == bfd_link_hash_new)
11268 {
11269 h->root.type = bfd_link_hash_defined;
11270 h->root.u.def.section = stub_entry->group->stub_sec;
11271 h->root.u.def.value = stub_entry->stub_offset;
11272 h->ref_regular = 1;
11273 h->def_regular = 1;
11274 h->ref_regular_nonweak = 1;
11275 h->forced_local = 1;
11276 h->non_elf = 0;
11277 h->root.linker_def = 1;
11278 }
11279 }
11280
11281 return TRUE;
11282 }
11283
11284 /* As above, but don't actually build the stub. Just bump offset so
11285 we know stub section sizes, and select plt_branch stubs where
11286 long_branch stubs won't do. */
11287
11288 static bfd_boolean
11289 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11290 {
11291 struct ppc_stub_hash_entry *stub_entry;
11292 struct bfd_link_info *info;
11293 struct ppc_link_hash_table *htab;
11294 bfd_vma off;
11295 int size;
11296
11297 /* Massage our args to the form they really have. */
11298 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11299 info = in_arg;
11300
11301 htab = ppc_hash_table (info);
11302 if (htab == NULL)
11303 return FALSE;
11304
11305 if (stub_entry->h != NULL
11306 && stub_entry->h->save_res
11307 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11308 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11309 {
11310 /* Don't make stubs to out-of-line register save/restore
11311 functions. Instead, emit copies of the functions. */
11312 stub_entry->group->needs_save_res = 1;
11313 stub_entry->stub_type = ppc_stub_save_res;
11314 return TRUE;
11315 }
11316
11317 if (stub_entry->stub_type == ppc_stub_plt_call
11318 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11319 {
11320 asection *plt;
11321 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11322 if (off >= (bfd_vma) -2)
11323 abort ();
11324 plt = htab->elf.splt;
11325 if (!htab->elf.dynamic_sections_created
11326 || stub_entry->h == NULL
11327 || stub_entry->h->elf.dynindx == -1)
11328 plt = htab->elf.iplt;
11329 off += (plt->output_offset
11330 + plt->output_section->vma
11331 - elf_gp (info->output_bfd)
11332 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11333
11334 size = plt_stub_size (htab, stub_entry, off);
11335 if (stub_entry->h != NULL
11336 && (stub_entry->h == htab->tls_get_addr_fd
11337 || stub_entry->h == htab->tls_get_addr)
11338 && htab->params->tls_get_addr_opt
11339 && (ALWAYS_EMIT_R2SAVE
11340 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11341 stub_entry->group->tls_get_addr_opt_bctrl
11342 = stub_entry->group->stub_sec->size + size - 5 * 4;
11343
11344 if (htab->params->plt_stub_align)
11345 size += plt_stub_pad (htab, stub_entry, off);
11346 if (info->emitrelocations)
11347 {
11348 stub_entry->group->stub_sec->reloc_count
11349 += ((PPC_HA (off) != 0)
11350 + (htab->opd_abi
11351 ? 2 + (htab->params->plt_static_chain
11352 && PPC_HA (off + 16) == PPC_HA (off))
11353 : 1));
11354 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11355 }
11356 }
11357 else
11358 {
11359 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11360 variants. */
11361 bfd_vma r2off = 0;
11362 bfd_vma local_off = 0;
11363
11364 off = (stub_entry->target_value
11365 + stub_entry->target_section->output_offset
11366 + stub_entry->target_section->output_section->vma);
11367 off -= (stub_entry->group->stub_sec->size
11368 + stub_entry->group->stub_sec->output_offset
11369 + stub_entry->group->stub_sec->output_section->vma);
11370
11371 /* Reset the stub type from the plt variant in case we now
11372 can reach with a shorter stub. */
11373 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11374 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11375
11376 size = 4;
11377 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11378 {
11379 r2off = get_r2off (info, stub_entry);
11380 if (r2off == (bfd_vma) -1)
11381 {
11382 htab->stub_error = TRUE;
11383 return FALSE;
11384 }
11385 size = 8;
11386 if (PPC_HA (r2off) != 0)
11387 size += 4;
11388 if (PPC_LO (r2off) != 0)
11389 size += 4;
11390 off -= size - 4;
11391 }
11392
11393 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11394
11395 /* If the branch offset is too big, use a ppc_stub_plt_branch.
11396 Do the same for -R objects without function descriptors. */
11397 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11398 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11399 && r2off == 0
11400 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11401 {
11402 struct ppc_branch_hash_entry *br_entry;
11403
11404 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11405 stub_entry->root.string + 9,
11406 TRUE, FALSE);
11407 if (br_entry == NULL)
11408 {
11409 _bfd_error_handler (_("can't build branch stub `%s'"),
11410 stub_entry->root.string);
11411 htab->stub_error = TRUE;
11412 return FALSE;
11413 }
11414
11415 if (br_entry->iter != htab->stub_iteration)
11416 {
11417 br_entry->iter = htab->stub_iteration;
11418 br_entry->offset = htab->brlt->size;
11419 htab->brlt->size += 8;
11420
11421 if (htab->relbrlt != NULL)
11422 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11423 else if (info->emitrelocations)
11424 {
11425 htab->brlt->reloc_count += 1;
11426 htab->brlt->flags |= SEC_RELOC;
11427 }
11428 }
11429
11430 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11431 off = (br_entry->offset
11432 + htab->brlt->output_offset
11433 + htab->brlt->output_section->vma
11434 - elf_gp (info->output_bfd)
11435 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11436
11437 if (info->emitrelocations)
11438 {
11439 stub_entry->group->stub_sec->reloc_count
11440 += 1 + (PPC_HA (off) != 0);
11441 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11442 }
11443
11444 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11445 {
11446 size = 12;
11447 if (PPC_HA (off) != 0)
11448 size = 16;
11449 }
11450 else
11451 {
11452 size = 16;
11453 if (PPC_HA (off) != 0)
11454 size += 4;
11455
11456 if (PPC_HA (r2off) != 0)
11457 size += 4;
11458 if (PPC_LO (r2off) != 0)
11459 size += 4;
11460 }
11461 }
11462 else if (info->emitrelocations)
11463 {
11464 stub_entry->group->stub_sec->reloc_count += 1;
11465 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11466 }
11467 }
11468
11469 stub_entry->group->stub_sec->size += size;
11470 return TRUE;
11471 }
11472
11473 /* Set up various things so that we can make a list of input sections
11474 for each output section included in the link. Returns -1 on error,
11475 0 when no stubs will be needed, and 1 on success. */
11476
11477 int
11478 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11479 {
11480 unsigned int id;
11481 bfd_size_type amt;
11482 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11483
11484 if (htab == NULL)
11485 return -1;
11486
11487 htab->sec_info_arr_size = bfd_get_next_section_id ();
11488 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11489 htab->sec_info = bfd_zmalloc (amt);
11490 if (htab->sec_info == NULL)
11491 return -1;
11492
11493 /* Set toc_off for com, und, abs and ind sections. */
11494 for (id = 0; id < 3; id++)
11495 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11496
11497 return 1;
11498 }
11499
11500 /* Set up for first pass at multitoc partitioning. */
11501
11502 void
11503 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11504 {
11505 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11506
11507 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11508 htab->toc_bfd = NULL;
11509 htab->toc_first_sec = NULL;
11510 }
11511
11512 /* The linker repeatedly calls this function for each TOC input section
11513 and linker generated GOT section. Group input bfds such that the toc
11514 within a group is less than 64k in size. */
11515
11516 bfd_boolean
11517 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11518 {
11519 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11520 bfd_vma addr, off, limit;
11521
11522 if (htab == NULL)
11523 return FALSE;
11524
11525 if (!htab->second_toc_pass)
11526 {
11527 /* Keep track of the first .toc or .got section for this input bfd. */
11528 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11529
11530 if (new_bfd)
11531 {
11532 htab->toc_bfd = isec->owner;
11533 htab->toc_first_sec = isec;
11534 }
11535
11536 addr = isec->output_offset + isec->output_section->vma;
11537 off = addr - htab->toc_curr;
11538 limit = 0x80008000;
11539 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11540 limit = 0x10000;
11541 if (off + isec->size > limit)
11542 {
11543 addr = (htab->toc_first_sec->output_offset
11544 + htab->toc_first_sec->output_section->vma);
11545 htab->toc_curr = addr;
11546 htab->toc_curr &= -TOC_BASE_ALIGN;
11547 }
11548
11549 /* toc_curr is the base address of this toc group. Set elf_gp
11550 for the input section to be the offset relative to the
11551 output toc base plus 0x8000. Making the input elf_gp an
11552 offset allows us to move the toc as a whole without
11553 recalculating input elf_gp. */
11554 off = htab->toc_curr - elf_gp (info->output_bfd);
11555 off += TOC_BASE_OFF;
11556
11557 /* Die if someone uses a linker script that doesn't keep input
11558 file .toc and .got together. */
11559 if (new_bfd
11560 && elf_gp (isec->owner) != 0
11561 && elf_gp (isec->owner) != off)
11562 return FALSE;
11563
11564 elf_gp (isec->owner) = off;
11565 return TRUE;
11566 }
11567
11568 /* During the second pass toc_first_sec points to the start of
11569 a toc group, and toc_curr is used to track the old elf_gp.
11570 We use toc_bfd to ensure we only look at each bfd once. */
11571 if (htab->toc_bfd == isec->owner)
11572 return TRUE;
11573 htab->toc_bfd = isec->owner;
11574
11575 if (htab->toc_first_sec == NULL
11576 || htab->toc_curr != elf_gp (isec->owner))
11577 {
11578 htab->toc_curr = elf_gp (isec->owner);
11579 htab->toc_first_sec = isec;
11580 }
11581 addr = (htab->toc_first_sec->output_offset
11582 + htab->toc_first_sec->output_section->vma);
11583 off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF;
11584 elf_gp (isec->owner) = off;
11585
11586 return TRUE;
11587 }
11588
11589 /* Called via elf_link_hash_traverse to merge GOT entries for global
11590 symbol H. */
11591
11592 static bfd_boolean
11593 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11594 {
11595 if (h->root.type == bfd_link_hash_indirect)
11596 return TRUE;
11597
11598 merge_got_entries (&h->got.glist);
11599
11600 return TRUE;
11601 }
11602
11603 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11604 symbol H. */
11605
11606 static bfd_boolean
11607 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11608 {
11609 struct got_entry *gent;
11610
11611 if (h->root.type == bfd_link_hash_indirect)
11612 return TRUE;
11613
11614 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11615 if (!gent->is_indirect)
11616 allocate_got (h, (struct bfd_link_info *) inf, gent);
11617 return TRUE;
11618 }
11619
11620 /* Called on the first multitoc pass after the last call to
11621 ppc64_elf_next_toc_section. This function removes duplicate GOT
11622 entries. */
11623
11624 bfd_boolean
11625 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11626 {
11627 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11628 struct bfd *ibfd, *ibfd2;
11629 bfd_boolean done_something;
11630
11631 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11632
11633 if (!htab->do_multi_toc)
11634 return FALSE;
11635
11636 /* Merge global sym got entries within a toc group. */
11637 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11638
11639 /* And tlsld_got. */
11640 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11641 {
11642 struct got_entry *ent, *ent2;
11643
11644 if (!is_ppc64_elf (ibfd))
11645 continue;
11646
11647 ent = ppc64_tlsld_got (ibfd);
11648 if (!ent->is_indirect
11649 && ent->got.offset != (bfd_vma) -1)
11650 {
11651 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11652 {
11653 if (!is_ppc64_elf (ibfd2))
11654 continue;
11655
11656 ent2 = ppc64_tlsld_got (ibfd2);
11657 if (!ent2->is_indirect
11658 && ent2->got.offset != (bfd_vma) -1
11659 && elf_gp (ibfd2) == elf_gp (ibfd))
11660 {
11661 ent2->is_indirect = TRUE;
11662 ent2->got.ent = ent;
11663 }
11664 }
11665 }
11666 }
11667
11668 /* Zap sizes of got sections. */
11669 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11670 htab->elf.irelplt->size -= htab->got_reli_size;
11671 htab->got_reli_size = 0;
11672
11673 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11674 {
11675 asection *got, *relgot;
11676
11677 if (!is_ppc64_elf (ibfd))
11678 continue;
11679
11680 got = ppc64_elf_tdata (ibfd)->got;
11681 if (got != NULL)
11682 {
11683 got->rawsize = got->size;
11684 got->size = 0;
11685 relgot = ppc64_elf_tdata (ibfd)->relgot;
11686 relgot->rawsize = relgot->size;
11687 relgot->size = 0;
11688 }
11689 }
11690
11691 /* Now reallocate the got, local syms first. We don't need to
11692 allocate section contents again since we never increase size. */
11693 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11694 {
11695 struct got_entry **lgot_ents;
11696 struct got_entry **end_lgot_ents;
11697 struct plt_entry **local_plt;
11698 struct plt_entry **end_local_plt;
11699 unsigned char *lgot_masks;
11700 bfd_size_type locsymcount;
11701 Elf_Internal_Shdr *symtab_hdr;
11702 asection *s;
11703
11704 if (!is_ppc64_elf (ibfd))
11705 continue;
11706
11707 lgot_ents = elf_local_got_ents (ibfd);
11708 if (!lgot_ents)
11709 continue;
11710
11711 symtab_hdr = &elf_symtab_hdr (ibfd);
11712 locsymcount = symtab_hdr->sh_info;
11713 end_lgot_ents = lgot_ents + locsymcount;
11714 local_plt = (struct plt_entry **) end_lgot_ents;
11715 end_local_plt = local_plt + locsymcount;
11716 lgot_masks = (unsigned char *) end_local_plt;
11717 s = ppc64_elf_tdata (ibfd)->got;
11718 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11719 {
11720 struct got_entry *ent;
11721
11722 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11723 {
11724 unsigned int ent_size = 8;
11725 unsigned int rel_size = sizeof (Elf64_External_Rela);
11726
11727 ent->got.offset = s->size;
11728 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11729 {
11730 ent_size *= 2;
11731 rel_size *= 2;
11732 }
11733 s->size += ent_size;
11734 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
11735 {
11736 htab->elf.irelplt->size += rel_size;
11737 htab->got_reli_size += rel_size;
11738 }
11739 else if (bfd_link_pic (info)
11740 && !((ent->tls_type & TLS_TPREL) != 0
11741 && bfd_link_executable (info)))
11742 {
11743 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11744 srel->size += rel_size;
11745 }
11746 }
11747 }
11748 }
11749
11750 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11751
11752 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11753 {
11754 struct got_entry *ent;
11755
11756 if (!is_ppc64_elf (ibfd))
11757 continue;
11758
11759 ent = ppc64_tlsld_got (ibfd);
11760 if (!ent->is_indirect
11761 && ent->got.offset != (bfd_vma) -1)
11762 {
11763 asection *s = ppc64_elf_tdata (ibfd)->got;
11764 ent->got.offset = s->size;
11765 s->size += 16;
11766 if (bfd_link_pic (info))
11767 {
11768 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11769 srel->size += sizeof (Elf64_External_Rela);
11770 }
11771 }
11772 }
11773
11774 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11775 if (!done_something)
11776 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11777 {
11778 asection *got;
11779
11780 if (!is_ppc64_elf (ibfd))
11781 continue;
11782
11783 got = ppc64_elf_tdata (ibfd)->got;
11784 if (got != NULL)
11785 {
11786 done_something = got->rawsize != got->size;
11787 if (done_something)
11788 break;
11789 }
11790 }
11791
11792 if (done_something)
11793 (*htab->params->layout_sections_again) ();
11794
11795 /* Set up for second pass over toc sections to recalculate elf_gp
11796 on input sections. */
11797 htab->toc_bfd = NULL;
11798 htab->toc_first_sec = NULL;
11799 htab->second_toc_pass = TRUE;
11800 return done_something;
11801 }
11802
11803 /* Called after second pass of multitoc partitioning. */
11804
11805 void
11806 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11807 {
11808 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11809
11810 /* After the second pass, toc_curr tracks the TOC offset used
11811 for code sections below in ppc64_elf_next_input_section. */
11812 htab->toc_curr = TOC_BASE_OFF;
11813 }
11814
11815 /* No toc references were found in ISEC. If the code in ISEC makes no
11816 calls, then there's no need to use toc adjusting stubs when branching
11817 into ISEC. Actually, indirect calls from ISEC are OK as they will
11818 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11819 needed, and 2 if a cyclical call-graph was found but no other reason
11820 for a stub was detected. If called from the top level, a return of
11821 2 means the same as a return of 0. */
11822
11823 static int
11824 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11825 {
11826 int ret;
11827
11828 /* Mark this section as checked. */
11829 isec->call_check_done = 1;
11830
11831 /* We know none of our code bearing sections will need toc stubs. */
11832 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11833 return 0;
11834
11835 if (isec->size == 0)
11836 return 0;
11837
11838 if (isec->output_section == NULL)
11839 return 0;
11840
11841 ret = 0;
11842 if (isec->reloc_count != 0)
11843 {
11844 Elf_Internal_Rela *relstart, *rel;
11845 Elf_Internal_Sym *local_syms;
11846 struct ppc_link_hash_table *htab;
11847
11848 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11849 info->keep_memory);
11850 if (relstart == NULL)
11851 return -1;
11852
11853 /* Look for branches to outside of this section. */
11854 local_syms = NULL;
11855 htab = ppc_hash_table (info);
11856 if (htab == NULL)
11857 return -1;
11858
11859 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11860 {
11861 enum elf_ppc64_reloc_type r_type;
11862 unsigned long r_symndx;
11863 struct elf_link_hash_entry *h;
11864 struct ppc_link_hash_entry *eh;
11865 Elf_Internal_Sym *sym;
11866 asection *sym_sec;
11867 struct _opd_sec_data *opd;
11868 bfd_vma sym_value;
11869 bfd_vma dest;
11870
11871 r_type = ELF64_R_TYPE (rel->r_info);
11872 if (r_type != R_PPC64_REL24
11873 && r_type != R_PPC64_REL14
11874 && r_type != R_PPC64_REL14_BRTAKEN
11875 && r_type != R_PPC64_REL14_BRNTAKEN)
11876 continue;
11877
11878 r_symndx = ELF64_R_SYM (rel->r_info);
11879 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11880 isec->owner))
11881 {
11882 ret = -1;
11883 break;
11884 }
11885
11886 /* Calls to dynamic lib functions go through a plt call stub
11887 that uses r2. */
11888 eh = (struct ppc_link_hash_entry *) h;
11889 if (eh != NULL
11890 && (eh->elf.plt.plist != NULL
11891 || (eh->oh != NULL
11892 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11893 {
11894 ret = 1;
11895 break;
11896 }
11897
11898 if (sym_sec == NULL)
11899 /* Ignore other undefined symbols. */
11900 continue;
11901
11902 /* Assume branches to other sections not included in the
11903 link need stubs too, to cover -R and absolute syms. */
11904 if (sym_sec->output_section == NULL)
11905 {
11906 ret = 1;
11907 break;
11908 }
11909
11910 if (h == NULL)
11911 sym_value = sym->st_value;
11912 else
11913 {
11914 if (h->root.type != bfd_link_hash_defined
11915 && h->root.type != bfd_link_hash_defweak)
11916 abort ();
11917 sym_value = h->root.u.def.value;
11918 }
11919 sym_value += rel->r_addend;
11920
11921 /* If this branch reloc uses an opd sym, find the code section. */
11922 opd = get_opd_info (sym_sec);
11923 if (opd != NULL)
11924 {
11925 if (h == NULL && opd->adjust != NULL)
11926 {
11927 long adjust;
11928
11929 adjust = opd->adjust[OPD_NDX (sym_value)];
11930 if (adjust == -1)
11931 /* Assume deleted functions won't ever be called. */
11932 continue;
11933 sym_value += adjust;
11934 }
11935
11936 dest = opd_entry_value (sym_sec, sym_value,
11937 &sym_sec, NULL, FALSE);
11938 if (dest == (bfd_vma) -1)
11939 continue;
11940 }
11941 else
11942 dest = (sym_value
11943 + sym_sec->output_offset
11944 + sym_sec->output_section->vma);
11945
11946 /* Ignore branch to self. */
11947 if (sym_sec == isec)
11948 continue;
11949
11950 /* If the called function uses the toc, we need a stub. */
11951 if (sym_sec->has_toc_reloc
11952 || sym_sec->makes_toc_func_call)
11953 {
11954 ret = 1;
11955 break;
11956 }
11957
11958 /* Assume any branch that needs a long branch stub might in fact
11959 need a plt_branch stub. A plt_branch stub uses r2. */
11960 else if (dest - (isec->output_offset
11961 + isec->output_section->vma
11962 + rel->r_offset) + (1 << 25)
11963 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11964 ? h->other
11965 : sym->st_other))
11966 {
11967 ret = 1;
11968 break;
11969 }
11970
11971 /* If calling back to a section in the process of being
11972 tested, we can't say for sure that no toc adjusting stubs
11973 are needed, so don't return zero. */
11974 else if (sym_sec->call_check_in_progress)
11975 ret = 2;
11976
11977 /* Branches to another section that itself doesn't have any TOC
11978 references are OK. Recursively call ourselves to check. */
11979 else if (!sym_sec->call_check_done)
11980 {
11981 int recur;
11982
11983 /* Mark current section as indeterminate, so that other
11984 sections that call back to current won't be marked as
11985 known. */
11986 isec->call_check_in_progress = 1;
11987 recur = toc_adjusting_stub_needed (info, sym_sec);
11988 isec->call_check_in_progress = 0;
11989
11990 if (recur != 0)
11991 {
11992 ret = recur;
11993 if (recur != 2)
11994 break;
11995 }
11996 }
11997 }
11998
11999 if (local_syms != NULL
12000 && (elf_symtab_hdr (isec->owner).contents
12001 != (unsigned char *) local_syms))
12002 free (local_syms);
12003 if (elf_section_data (isec)->relocs != relstart)
12004 free (relstart);
12005 }
12006
12007 if ((ret & 1) == 0
12008 && isec->map_head.s != NULL
12009 && (strcmp (isec->output_section->name, ".init") == 0
12010 || strcmp (isec->output_section->name, ".fini") == 0))
12011 {
12012 if (isec->map_head.s->has_toc_reloc
12013 || isec->map_head.s->makes_toc_func_call)
12014 ret = 1;
12015 else if (!isec->map_head.s->call_check_done)
12016 {
12017 int recur;
12018 isec->call_check_in_progress = 1;
12019 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12020 isec->call_check_in_progress = 0;
12021 if (recur != 0)
12022 ret = recur;
12023 }
12024 }
12025
12026 if (ret == 1)
12027 isec->makes_toc_func_call = 1;
12028
12029 return ret;
12030 }
12031
12032 /* The linker repeatedly calls this function for each input section,
12033 in the order that input sections are linked into output sections.
12034 Build lists of input sections to determine groupings between which
12035 we may insert linker stubs. */
12036
12037 bfd_boolean
12038 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12039 {
12040 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12041
12042 if (htab == NULL)
12043 return FALSE;
12044
12045 if ((isec->output_section->flags & SEC_CODE) != 0
12046 && isec->output_section->id < htab->sec_info_arr_size)
12047 {
12048 /* This happens to make the list in reverse order,
12049 which is what we want. */
12050 htab->sec_info[isec->id].u.list
12051 = htab->sec_info[isec->output_section->id].u.list;
12052 htab->sec_info[isec->output_section->id].u.list = isec;
12053 }
12054
12055 if (htab->multi_toc_needed)
12056 {
12057 /* Analyse sections that aren't already flagged as needing a
12058 valid toc pointer. Exclude .fixup for the linux kernel.
12059 .fixup contains branches, but only back to the function that
12060 hit an exception. */
12061 if (!(isec->has_toc_reloc
12062 || (isec->flags & SEC_CODE) == 0
12063 || strcmp (isec->name, ".fixup") == 0
12064 || isec->call_check_done))
12065 {
12066 if (toc_adjusting_stub_needed (info, isec) < 0)
12067 return FALSE;
12068 }
12069 /* Make all sections use the TOC assigned for this object file.
12070 This will be wrong for pasted sections; We fix that in
12071 check_pasted_section(). */
12072 if (elf_gp (isec->owner) != 0)
12073 htab->toc_curr = elf_gp (isec->owner);
12074 }
12075
12076 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12077 return TRUE;
12078 }
12079
12080 /* Check that all .init and .fini sections use the same toc, if they
12081 have toc relocs. */
12082
12083 static bfd_boolean
12084 check_pasted_section (struct bfd_link_info *info, const char *name)
12085 {
12086 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12087
12088 if (o != NULL)
12089 {
12090 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12091 bfd_vma toc_off = 0;
12092 asection *i;
12093
12094 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12095 if (i->has_toc_reloc)
12096 {
12097 if (toc_off == 0)
12098 toc_off = htab->sec_info[i->id].toc_off;
12099 else if (toc_off != htab->sec_info[i->id].toc_off)
12100 return FALSE;
12101 }
12102
12103 if (toc_off == 0)
12104 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12105 if (i->makes_toc_func_call)
12106 {
12107 toc_off = htab->sec_info[i->id].toc_off;
12108 break;
12109 }
12110
12111 /* Make sure the whole pasted function uses the same toc offset. */
12112 if (toc_off != 0)
12113 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12114 htab->sec_info[i->id].toc_off = toc_off;
12115 }
12116 return TRUE;
12117 }
12118
12119 bfd_boolean
12120 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12121 {
12122 return (check_pasted_section (info, ".init")
12123 & check_pasted_section (info, ".fini"));
12124 }
12125
12126 /* See whether we can group stub sections together. Grouping stub
12127 sections may result in fewer stubs. More importantly, we need to
12128 put all .init* and .fini* stubs at the beginning of the .init or
12129 .fini output sections respectively, because glibc splits the
12130 _init and _fini functions into multiple parts. Putting a stub in
12131 the middle of a function is not a good idea. */
12132
12133 static bfd_boolean
12134 group_sections (struct bfd_link_info *info,
12135 bfd_size_type stub_group_size,
12136 bfd_boolean stubs_always_before_branch)
12137 {
12138 struct ppc_link_hash_table *htab;
12139 asection *osec;
12140 bfd_boolean suppress_size_errors;
12141
12142 htab = ppc_hash_table (info);
12143 if (htab == NULL)
12144 return FALSE;
12145
12146 suppress_size_errors = FALSE;
12147 if (stub_group_size == 1)
12148 {
12149 /* Default values. */
12150 if (stubs_always_before_branch)
12151 stub_group_size = 0x1e00000;
12152 else
12153 stub_group_size = 0x1c00000;
12154 suppress_size_errors = TRUE;
12155 }
12156
12157 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12158 {
12159 asection *tail;
12160
12161 if (osec->id >= htab->sec_info_arr_size)
12162 continue;
12163
12164 tail = htab->sec_info[osec->id].u.list;
12165 while (tail != NULL)
12166 {
12167 asection *curr;
12168 asection *prev;
12169 bfd_size_type total;
12170 bfd_boolean big_sec;
12171 bfd_vma curr_toc;
12172 struct map_stub *group;
12173 bfd_size_type group_size;
12174
12175 curr = tail;
12176 total = tail->size;
12177 group_size = (ppc64_elf_section_data (tail) != NULL
12178 && ppc64_elf_section_data (tail)->has_14bit_branch
12179 ? stub_group_size >> 10 : stub_group_size);
12180
12181 big_sec = total > group_size;
12182 if (big_sec && !suppress_size_errors)
12183 /* xgettext:c-format */
12184 _bfd_error_handler (_("%pB section %pA exceeds stub group size"),
12185 tail->owner, tail);
12186 curr_toc = htab->sec_info[tail->id].toc_off;
12187
12188 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12189 && ((total += curr->output_offset - prev->output_offset)
12190 < (ppc64_elf_section_data (prev) != NULL
12191 && ppc64_elf_section_data (prev)->has_14bit_branch
12192 ? (group_size = stub_group_size >> 10) : group_size))
12193 && htab->sec_info[prev->id].toc_off == curr_toc)
12194 curr = prev;
12195
12196 /* OK, the size from the start of CURR to the end is less
12197 than group_size and thus can be handled by one stub
12198 section. (or the tail section is itself larger than
12199 group_size, in which case we may be toast.) We should
12200 really be keeping track of the total size of stubs added
12201 here, as stubs contribute to the final output section
12202 size. That's a little tricky, and this way will only
12203 break if stubs added make the total size more than 2^25,
12204 ie. for the default stub_group_size, if stubs total more
12205 than 2097152 bytes, or nearly 75000 plt call stubs. */
12206 group = bfd_alloc (curr->owner, sizeof (*group));
12207 if (group == NULL)
12208 return FALSE;
12209 group->link_sec = curr;
12210 group->stub_sec = NULL;
12211 group->needs_save_res = 0;
12212 group->tls_get_addr_opt_bctrl = -1u;
12213 group->next = htab->group;
12214 htab->group = group;
12215 do
12216 {
12217 prev = htab->sec_info[tail->id].u.list;
12218 /* Set up this stub group. */
12219 htab->sec_info[tail->id].u.group = group;
12220 }
12221 while (tail != curr && (tail = prev) != NULL);
12222
12223 /* But wait, there's more! Input sections up to group_size
12224 bytes before the stub section can be handled by it too.
12225 Don't do this if we have a really large section after the
12226 stubs, as adding more stubs increases the chance that
12227 branches may not reach into the stub section. */
12228 if (!stubs_always_before_branch && !big_sec)
12229 {
12230 total = 0;
12231 while (prev != NULL
12232 && ((total += tail->output_offset - prev->output_offset)
12233 < (ppc64_elf_section_data (prev) != NULL
12234 && ppc64_elf_section_data (prev)->has_14bit_branch
12235 ? (group_size = stub_group_size >> 10) : group_size))
12236 && htab->sec_info[prev->id].toc_off == curr_toc)
12237 {
12238 tail = prev;
12239 prev = htab->sec_info[tail->id].u.list;
12240 htab->sec_info[tail->id].u.group = group;
12241 }
12242 }
12243 tail = prev;
12244 }
12245 }
12246 return TRUE;
12247 }
12248
12249 static const unsigned char glink_eh_frame_cie[] =
12250 {
12251 0, 0, 0, 16, /* length. */
12252 0, 0, 0, 0, /* id. */
12253 1, /* CIE version. */
12254 'z', 'R', 0, /* Augmentation string. */
12255 4, /* Code alignment. */
12256 0x78, /* Data alignment. */
12257 65, /* RA reg. */
12258 1, /* Augmentation size. */
12259 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12260 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12261 };
12262
12263 static size_t
12264 stub_eh_frame_size (struct map_stub *group, size_t align)
12265 {
12266 size_t this_size = 17;
12267 if (group->tls_get_addr_opt_bctrl != -1u)
12268 {
12269 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12270 if (to_bctrl < 64)
12271 this_size += 1;
12272 else if (to_bctrl < 256)
12273 this_size += 2;
12274 else if (to_bctrl < 65536)
12275 this_size += 3;
12276 else
12277 this_size += 5;
12278 this_size += 6;
12279 }
12280 this_size = (this_size + align - 1) & -align;
12281 return this_size;
12282 }
12283
12284 /* Stripping output sections is normally done before dynamic section
12285 symbols have been allocated. This function is called later, and
12286 handles cases like htab->brlt which is mapped to its own output
12287 section. */
12288
12289 static void
12290 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12291 {
12292 if (isec->size == 0
12293 && isec->output_section->size == 0
12294 && !(isec->output_section->flags & SEC_KEEP)
12295 && !bfd_section_removed_from_list (info->output_bfd,
12296 isec->output_section)
12297 && elf_section_data (isec->output_section)->dynindx == 0)
12298 {
12299 isec->output_section->flags |= SEC_EXCLUDE;
12300 bfd_section_list_remove (info->output_bfd, isec->output_section);
12301 info->output_bfd->section_count--;
12302 }
12303 }
12304
12305 /* Determine and set the size of the stub section for a final link.
12306
12307 The basic idea here is to examine all the relocations looking for
12308 PC-relative calls to a target that is unreachable with a "bl"
12309 instruction. */
12310
12311 bfd_boolean
12312 ppc64_elf_size_stubs (struct bfd_link_info *info)
12313 {
12314 bfd_size_type stub_group_size;
12315 bfd_boolean stubs_always_before_branch;
12316 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12317
12318 if (htab == NULL)
12319 return FALSE;
12320
12321 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12322 htab->params->plt_thread_safe = 1;
12323 if (!htab->opd_abi)
12324 htab->params->plt_thread_safe = 0;
12325 else if (htab->params->plt_thread_safe == -1)
12326 {
12327 static const char *const thread_starter[] =
12328 {
12329 "pthread_create",
12330 /* libstdc++ */
12331 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12332 /* librt */
12333 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12334 "mq_notify", "create_timer",
12335 /* libanl */
12336 "getaddrinfo_a",
12337 /* libgomp */
12338 "GOMP_parallel",
12339 "GOMP_parallel_start",
12340 "GOMP_parallel_loop_static",
12341 "GOMP_parallel_loop_static_start",
12342 "GOMP_parallel_loop_dynamic",
12343 "GOMP_parallel_loop_dynamic_start",
12344 "GOMP_parallel_loop_guided",
12345 "GOMP_parallel_loop_guided_start",
12346 "GOMP_parallel_loop_runtime",
12347 "GOMP_parallel_loop_runtime_start",
12348 "GOMP_parallel_sections",
12349 "GOMP_parallel_sections_start",
12350 /* libgo */
12351 "__go_go",
12352 };
12353 unsigned i;
12354
12355 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12356 {
12357 struct elf_link_hash_entry *h;
12358 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12359 FALSE, FALSE, TRUE);
12360 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12361 if (htab->params->plt_thread_safe)
12362 break;
12363 }
12364 }
12365 stubs_always_before_branch = htab->params->group_size < 0;
12366 if (htab->params->group_size < 0)
12367 stub_group_size = -htab->params->group_size;
12368 else
12369 stub_group_size = htab->params->group_size;
12370
12371 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12372 return FALSE;
12373
12374 #define STUB_SHRINK_ITER 20
12375 /* Loop until no stubs added. After iteration 20 of this loop we may
12376 exit on a stub section shrinking. This is to break out of a
12377 pathological case where adding stubs on one iteration decreases
12378 section gaps (perhaps due to alignment), which then requires
12379 fewer or smaller stubs on the next iteration. */
12380
12381 while (1)
12382 {
12383 bfd *input_bfd;
12384 unsigned int bfd_indx;
12385 struct map_stub *group;
12386
12387 htab->stub_iteration += 1;
12388
12389 for (input_bfd = info->input_bfds, bfd_indx = 0;
12390 input_bfd != NULL;
12391 input_bfd = input_bfd->link.next, bfd_indx++)
12392 {
12393 Elf_Internal_Shdr *symtab_hdr;
12394 asection *section;
12395 Elf_Internal_Sym *local_syms = NULL;
12396
12397 if (!is_ppc64_elf (input_bfd))
12398 continue;
12399
12400 /* We'll need the symbol table in a second. */
12401 symtab_hdr = &elf_symtab_hdr (input_bfd);
12402 if (symtab_hdr->sh_info == 0)
12403 continue;
12404
12405 /* Walk over each section attached to the input bfd. */
12406 for (section = input_bfd->sections;
12407 section != NULL;
12408 section = section->next)
12409 {
12410 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12411
12412 /* If there aren't any relocs, then there's nothing more
12413 to do. */
12414 if ((section->flags & SEC_RELOC) == 0
12415 || (section->flags & SEC_ALLOC) == 0
12416 || (section->flags & SEC_LOAD) == 0
12417 || (section->flags & SEC_CODE) == 0
12418 || section->reloc_count == 0)
12419 continue;
12420
12421 /* If this section is a link-once section that will be
12422 discarded, then don't create any stubs. */
12423 if (section->output_section == NULL
12424 || section->output_section->owner != info->output_bfd)
12425 continue;
12426
12427 /* Get the relocs. */
12428 internal_relocs
12429 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12430 info->keep_memory);
12431 if (internal_relocs == NULL)
12432 goto error_ret_free_local;
12433
12434 /* Now examine each relocation. */
12435 irela = internal_relocs;
12436 irelaend = irela + section->reloc_count;
12437 for (; irela < irelaend; irela++)
12438 {
12439 enum elf_ppc64_reloc_type r_type;
12440 unsigned int r_indx;
12441 enum ppc_stub_type stub_type;
12442 struct ppc_stub_hash_entry *stub_entry;
12443 asection *sym_sec, *code_sec;
12444 bfd_vma sym_value, code_value;
12445 bfd_vma destination;
12446 unsigned long local_off;
12447 bfd_boolean ok_dest;
12448 struct ppc_link_hash_entry *hash;
12449 struct ppc_link_hash_entry *fdh;
12450 struct elf_link_hash_entry *h;
12451 Elf_Internal_Sym *sym;
12452 char *stub_name;
12453 const asection *id_sec;
12454 struct _opd_sec_data *opd;
12455 struct plt_entry *plt_ent;
12456
12457 r_type = ELF64_R_TYPE (irela->r_info);
12458 r_indx = ELF64_R_SYM (irela->r_info);
12459
12460 if (r_type >= R_PPC64_max)
12461 {
12462 bfd_set_error (bfd_error_bad_value);
12463 goto error_ret_free_internal;
12464 }
12465
12466 /* Only look for stubs on branch instructions. */
12467 if (r_type != R_PPC64_REL24
12468 && r_type != R_PPC64_REL14
12469 && r_type != R_PPC64_REL14_BRTAKEN
12470 && r_type != R_PPC64_REL14_BRNTAKEN)
12471 continue;
12472
12473 /* Now determine the call target, its name, value,
12474 section. */
12475 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12476 r_indx, input_bfd))
12477 goto error_ret_free_internal;
12478 hash = (struct ppc_link_hash_entry *) h;
12479
12480 ok_dest = FALSE;
12481 fdh = NULL;
12482 sym_value = 0;
12483 if (hash == NULL)
12484 {
12485 sym_value = sym->st_value;
12486 if (sym_sec != NULL
12487 && sym_sec->output_section != NULL)
12488 ok_dest = TRUE;
12489 }
12490 else if (hash->elf.root.type == bfd_link_hash_defined
12491 || hash->elf.root.type == bfd_link_hash_defweak)
12492 {
12493 sym_value = hash->elf.root.u.def.value;
12494 if (sym_sec->output_section != NULL)
12495 ok_dest = TRUE;
12496 }
12497 else if (hash->elf.root.type == bfd_link_hash_undefweak
12498 || hash->elf.root.type == bfd_link_hash_undefined)
12499 {
12500 /* Recognise an old ABI func code entry sym, and
12501 use the func descriptor sym instead if it is
12502 defined. */
12503 if (hash->elf.root.root.string[0] == '.'
12504 && hash->oh != NULL)
12505 {
12506 fdh = ppc_follow_link (hash->oh);
12507 if (fdh->elf.root.type == bfd_link_hash_defined
12508 || fdh->elf.root.type == bfd_link_hash_defweak)
12509 {
12510 sym_sec = fdh->elf.root.u.def.section;
12511 sym_value = fdh->elf.root.u.def.value;
12512 if (sym_sec->output_section != NULL)
12513 ok_dest = TRUE;
12514 }
12515 else
12516 fdh = NULL;
12517 }
12518 }
12519 else
12520 {
12521 bfd_set_error (bfd_error_bad_value);
12522 goto error_ret_free_internal;
12523 }
12524
12525 destination = 0;
12526 local_off = 0;
12527 if (ok_dest)
12528 {
12529 sym_value += irela->r_addend;
12530 destination = (sym_value
12531 + sym_sec->output_offset
12532 + sym_sec->output_section->vma);
12533 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12534 ? hash->elf.other
12535 : sym->st_other);
12536 }
12537
12538 code_sec = sym_sec;
12539 code_value = sym_value;
12540 opd = get_opd_info (sym_sec);
12541 if (opd != NULL)
12542 {
12543 bfd_vma dest;
12544
12545 if (hash == NULL && opd->adjust != NULL)
12546 {
12547 long adjust = opd->adjust[OPD_NDX (sym_value)];
12548 if (adjust == -1)
12549 continue;
12550 code_value += adjust;
12551 sym_value += adjust;
12552 }
12553 dest = opd_entry_value (sym_sec, sym_value,
12554 &code_sec, &code_value, FALSE);
12555 if (dest != (bfd_vma) -1)
12556 {
12557 destination = dest;
12558 if (fdh != NULL)
12559 {
12560 /* Fixup old ABI sym to point at code
12561 entry. */
12562 hash->elf.root.type = bfd_link_hash_defweak;
12563 hash->elf.root.u.def.section = code_sec;
12564 hash->elf.root.u.def.value = code_value;
12565 }
12566 }
12567 }
12568
12569 /* Determine what (if any) linker stub is needed. */
12570 plt_ent = NULL;
12571 stub_type = ppc_type_of_stub (section, irela, &hash,
12572 &plt_ent, destination,
12573 local_off);
12574
12575 if (stub_type != ppc_stub_plt_call)
12576 {
12577 /* Check whether we need a TOC adjusting stub.
12578 Since the linker pastes together pieces from
12579 different object files when creating the
12580 _init and _fini functions, it may be that a
12581 call to what looks like a local sym is in
12582 fact a call needing a TOC adjustment. */
12583 if (code_sec != NULL
12584 && code_sec->output_section != NULL
12585 && (htab->sec_info[code_sec->id].toc_off
12586 != htab->sec_info[section->id].toc_off)
12587 && (code_sec->has_toc_reloc
12588 || code_sec->makes_toc_func_call))
12589 stub_type = ppc_stub_long_branch_r2off;
12590 }
12591
12592 if (stub_type == ppc_stub_none)
12593 continue;
12594
12595 /* __tls_get_addr calls might be eliminated. */
12596 if (stub_type != ppc_stub_plt_call
12597 && hash != NULL
12598 && (hash == htab->tls_get_addr
12599 || hash == htab->tls_get_addr_fd)
12600 && section->has_tls_reloc
12601 && irela != internal_relocs)
12602 {
12603 /* Get tls info. */
12604 unsigned char *tls_mask;
12605
12606 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12607 irela - 1, input_bfd))
12608 goto error_ret_free_internal;
12609 if ((*tls_mask & TLS_TLS) != 0)
12610 continue;
12611 }
12612
12613 if (stub_type == ppc_stub_plt_call)
12614 {
12615 if (!htab->opd_abi
12616 && htab->params->plt_localentry0 != 0
12617 && is_elfv2_localentry0 (&hash->elf))
12618 htab->has_plt_localentry0 = 1;
12619 else if (irela + 1 < irelaend
12620 && irela[1].r_offset == irela->r_offset + 4
12621 && (ELF64_R_TYPE (irela[1].r_info)
12622 == R_PPC64_TOCSAVE))
12623 {
12624 if (!tocsave_find (htab, INSERT,
12625 &local_syms, irela + 1, input_bfd))
12626 goto error_ret_free_internal;
12627 }
12628 else
12629 stub_type = ppc_stub_plt_call_r2save;
12630 }
12631
12632 /* Support for grouping stub sections. */
12633 id_sec = htab->sec_info[section->id].u.group->link_sec;
12634
12635 /* Get the name of this stub. */
12636 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12637 if (!stub_name)
12638 goto error_ret_free_internal;
12639
12640 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12641 stub_name, FALSE, FALSE);
12642 if (stub_entry != NULL)
12643 {
12644 /* The proper stub has already been created. */
12645 free (stub_name);
12646 if (stub_type == ppc_stub_plt_call_r2save)
12647 stub_entry->stub_type = stub_type;
12648 continue;
12649 }
12650
12651 stub_entry = ppc_add_stub (stub_name, section, info);
12652 if (stub_entry == NULL)
12653 {
12654 free (stub_name);
12655 error_ret_free_internal:
12656 if (elf_section_data (section)->relocs == NULL)
12657 free (internal_relocs);
12658 error_ret_free_local:
12659 if (local_syms != NULL
12660 && (symtab_hdr->contents
12661 != (unsigned char *) local_syms))
12662 free (local_syms);
12663 return FALSE;
12664 }
12665
12666 stub_entry->stub_type = stub_type;
12667 if (stub_type != ppc_stub_plt_call
12668 && stub_type != ppc_stub_plt_call_r2save)
12669 {
12670 stub_entry->target_value = code_value;
12671 stub_entry->target_section = code_sec;
12672 }
12673 else
12674 {
12675 stub_entry->target_value = sym_value;
12676 stub_entry->target_section = sym_sec;
12677 }
12678 stub_entry->h = hash;
12679 stub_entry->plt_ent = plt_ent;
12680 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12681
12682 if (stub_entry->h != NULL)
12683 htab->stub_globals += 1;
12684 }
12685
12686 /* We're done with the internal relocs, free them. */
12687 if (elf_section_data (section)->relocs != internal_relocs)
12688 free (internal_relocs);
12689 }
12690
12691 if (local_syms != NULL
12692 && symtab_hdr->contents != (unsigned char *) local_syms)
12693 {
12694 if (!info->keep_memory)
12695 free (local_syms);
12696 else
12697 symtab_hdr->contents = (unsigned char *) local_syms;
12698 }
12699 }
12700
12701 /* We may have added some stubs. Find out the new size of the
12702 stub sections. */
12703 for (group = htab->group; group != NULL; group = group->next)
12704 if (group->stub_sec != NULL)
12705 {
12706 asection *stub_sec = group->stub_sec;
12707
12708 if (htab->stub_iteration <= STUB_SHRINK_ITER
12709 || stub_sec->rawsize < stub_sec->size)
12710 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12711 stub_sec->rawsize = stub_sec->size;
12712 stub_sec->size = 0;
12713 stub_sec->reloc_count = 0;
12714 stub_sec->flags &= ~SEC_RELOC;
12715 }
12716
12717 if (htab->stub_iteration <= STUB_SHRINK_ITER
12718 || htab->brlt->rawsize < htab->brlt->size)
12719 htab->brlt->rawsize = htab->brlt->size;
12720 htab->brlt->size = 0;
12721 htab->brlt->reloc_count = 0;
12722 htab->brlt->flags &= ~SEC_RELOC;
12723 if (htab->relbrlt != NULL)
12724 htab->relbrlt->size = 0;
12725
12726 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12727
12728 for (group = htab->group; group != NULL; group = group->next)
12729 if (group->needs_save_res)
12730 group->stub_sec->size += htab->sfpr->size;
12731
12732 if (info->emitrelocations
12733 && htab->glink != NULL && htab->glink->size != 0)
12734 {
12735 htab->glink->reloc_count = 1;
12736 htab->glink->flags |= SEC_RELOC;
12737 }
12738
12739 if (htab->glink_eh_frame != NULL
12740 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12741 && htab->glink_eh_frame->output_section->size > 8)
12742 {
12743 size_t size = 0, align = 4;
12744
12745 for (group = htab->group; group != NULL; group = group->next)
12746 if (group->stub_sec != NULL)
12747 size += stub_eh_frame_size (group, align);
12748 if (htab->glink != NULL && htab->glink->size != 0)
12749 size += (24 + align - 1) & -align;
12750 if (size != 0)
12751 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12752 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12753 size = (size + align - 1) & -align;
12754 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12755 htab->glink_eh_frame->size = size;
12756 }
12757
12758 if (htab->params->plt_stub_align != 0)
12759 for (group = htab->group; group != NULL; group = group->next)
12760 if (group->stub_sec != NULL)
12761 {
12762 int align = abs (htab->params->plt_stub_align);
12763 group->stub_sec->size
12764 = (group->stub_sec->size + (1 << align) - 1) & -(1 << align);
12765 }
12766
12767 for (group = htab->group; group != NULL; group = group->next)
12768 if (group->stub_sec != NULL
12769 && group->stub_sec->rawsize != group->stub_sec->size
12770 && (htab->stub_iteration <= STUB_SHRINK_ITER
12771 || group->stub_sec->rawsize < group->stub_sec->size))
12772 break;
12773
12774 if (group == NULL
12775 && (htab->brlt->rawsize == htab->brlt->size
12776 || (htab->stub_iteration > STUB_SHRINK_ITER
12777 && htab->brlt->rawsize > htab->brlt->size))
12778 && (htab->glink_eh_frame == NULL
12779 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12780 break;
12781
12782 /* Ask the linker to do its stuff. */
12783 (*htab->params->layout_sections_again) ();
12784 }
12785
12786 if (htab->glink_eh_frame != NULL
12787 && htab->glink_eh_frame->size != 0)
12788 {
12789 bfd_vma val;
12790 bfd_byte *p, *last_fde;
12791 size_t last_fde_len, size, align, pad;
12792 struct map_stub *group;
12793
12794 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12795 if (p == NULL)
12796 return FALSE;
12797 htab->glink_eh_frame->contents = p;
12798 last_fde = p;
12799 align = 4;
12800
12801 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12802 /* CIE length (rewrite in case little-endian). */
12803 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12804 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12805 p += last_fde_len + 4;
12806
12807 for (group = htab->group; group != NULL; group = group->next)
12808 if (group->stub_sec != NULL)
12809 {
12810 last_fde = p;
12811 last_fde_len = stub_eh_frame_size (group, align) - 4;
12812 /* FDE length. */
12813 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12814 p += 4;
12815 /* CIE pointer. */
12816 val = p - htab->glink_eh_frame->contents;
12817 bfd_put_32 (htab->elf.dynobj, val, p);
12818 p += 4;
12819 /* Offset to stub section, written later. */
12820 p += 4;
12821 /* stub section size. */
12822 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12823 p += 4;
12824 /* Augmentation. */
12825 p += 1;
12826 if (group->tls_get_addr_opt_bctrl != -1u)
12827 {
12828 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12829
12830 /* This FDE needs more than just the default.
12831 Describe __tls_get_addr_opt stub LR. */
12832 if (to_bctrl < 64)
12833 *p++ = DW_CFA_advance_loc + to_bctrl;
12834 else if (to_bctrl < 256)
12835 {
12836 *p++ = DW_CFA_advance_loc1;
12837 *p++ = to_bctrl;
12838 }
12839 else if (to_bctrl < 65536)
12840 {
12841 *p++ = DW_CFA_advance_loc2;
12842 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12843 p += 2;
12844 }
12845 else
12846 {
12847 *p++ = DW_CFA_advance_loc4;
12848 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12849 p += 4;
12850 }
12851 *p++ = DW_CFA_offset_extended_sf;
12852 *p++ = 65;
12853 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12854 *p++ = DW_CFA_advance_loc + 4;
12855 *p++ = DW_CFA_restore_extended;
12856 *p++ = 65;
12857 }
12858 /* Pad. */
12859 p = last_fde + last_fde_len + 4;
12860 }
12861 if (htab->glink != NULL && htab->glink->size != 0)
12862 {
12863 last_fde = p;
12864 last_fde_len = ((24 + align - 1) & -align) - 4;
12865 /* FDE length. */
12866 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12867 p += 4;
12868 /* CIE pointer. */
12869 val = p - htab->glink_eh_frame->contents;
12870 bfd_put_32 (htab->elf.dynobj, val, p);
12871 p += 4;
12872 /* Offset to .glink, written later. */
12873 p += 4;
12874 /* .glink size. */
12875 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12876 p += 4;
12877 /* Augmentation. */
12878 p += 1;
12879
12880 *p++ = DW_CFA_advance_loc + 1;
12881 *p++ = DW_CFA_register;
12882 *p++ = 65;
12883 *p++ = htab->opd_abi ? 12 : 0;
12884 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12885 *p++ = DW_CFA_restore_extended;
12886 *p++ = 65;
12887 p += ((24 + align - 1) & -align) - 24;
12888 }
12889 /* Subsume any padding into the last FDE if user .eh_frame
12890 sections are aligned more than glink_eh_frame. Otherwise any
12891 zero padding will be seen as a terminator. */
12892 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12893 size = p - htab->glink_eh_frame->contents;
12894 pad = ((size + align - 1) & -align) - size;
12895 htab->glink_eh_frame->size = size + pad;
12896 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12897 }
12898
12899 maybe_strip_output (info, htab->brlt);
12900 if (htab->glink_eh_frame != NULL)
12901 maybe_strip_output (info, htab->glink_eh_frame);
12902
12903 return TRUE;
12904 }
12905
12906 /* Called after we have determined section placement. If sections
12907 move, we'll be called again. Provide a value for TOCstart. */
12908
12909 bfd_vma
12910 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12911 {
12912 asection *s;
12913 bfd_vma TOCstart, adjust;
12914
12915 if (info != NULL)
12916 {
12917 struct elf_link_hash_entry *h;
12918 struct elf_link_hash_table *htab = elf_hash_table (info);
12919
12920 if (is_elf_hash_table (htab)
12921 && htab->hgot != NULL)
12922 h = htab->hgot;
12923 else
12924 {
12925 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12926 if (is_elf_hash_table (htab))
12927 htab->hgot = h;
12928 }
12929 if (h != NULL
12930 && h->root.type == bfd_link_hash_defined
12931 && !h->root.linker_def
12932 && (!is_elf_hash_table (htab)
12933 || h->def_regular))
12934 {
12935 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12936 + h->root.u.def.section->output_offset
12937 + h->root.u.def.section->output_section->vma);
12938 _bfd_set_gp_value (obfd, TOCstart);
12939 return TOCstart;
12940 }
12941 }
12942
12943 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12944 order. The TOC starts where the first of these sections starts. */
12945 s = bfd_get_section_by_name (obfd, ".got");
12946 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12947 s = bfd_get_section_by_name (obfd, ".toc");
12948 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12949 s = bfd_get_section_by_name (obfd, ".tocbss");
12950 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12951 s = bfd_get_section_by_name (obfd, ".plt");
12952 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12953 {
12954 /* This may happen for
12955 o references to TOC base (SYM@toc / TOC[tc0]) without a
12956 .toc directive
12957 o bad linker script
12958 o --gc-sections and empty TOC sections
12959
12960 FIXME: Warn user? */
12961
12962 /* Look for a likely section. We probably won't even be
12963 using TOCstart. */
12964 for (s = obfd->sections; s != NULL; s = s->next)
12965 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12966 | SEC_EXCLUDE))
12967 == (SEC_ALLOC | SEC_SMALL_DATA))
12968 break;
12969 if (s == NULL)
12970 for (s = obfd->sections; s != NULL; s = s->next)
12971 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12972 == (SEC_ALLOC | SEC_SMALL_DATA))
12973 break;
12974 if (s == NULL)
12975 for (s = obfd->sections; s != NULL; s = s->next)
12976 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12977 == SEC_ALLOC)
12978 break;
12979 if (s == NULL)
12980 for (s = obfd->sections; s != NULL; s = s->next)
12981 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12982 break;
12983 }
12984
12985 TOCstart = 0;
12986 if (s != NULL)
12987 TOCstart = s->output_section->vma + s->output_offset;
12988
12989 /* Force alignment. */
12990 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12991 TOCstart -= adjust;
12992 _bfd_set_gp_value (obfd, TOCstart);
12993
12994 if (info != NULL && s != NULL)
12995 {
12996 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12997
12998 if (htab != NULL)
12999 {
13000 if (htab->elf.hgot != NULL)
13001 {
13002 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13003 htab->elf.hgot->root.u.def.section = s;
13004 }
13005 }
13006 else
13007 {
13008 struct bfd_link_hash_entry *bh = NULL;
13009 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13010 s, TOC_BASE_OFF - adjust,
13011 NULL, FALSE, FALSE, &bh);
13012 }
13013 }
13014 return TOCstart;
13015 }
13016
13017 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13018 write out any global entry stubs. */
13019
13020 static bfd_boolean
13021 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13022 {
13023 struct bfd_link_info *info;
13024 struct ppc_link_hash_table *htab;
13025 struct plt_entry *pent;
13026 asection *s;
13027
13028 if (h->root.type == bfd_link_hash_indirect)
13029 return TRUE;
13030
13031 if (!h->pointer_equality_needed)
13032 return TRUE;
13033
13034 if (h->def_regular)
13035 return TRUE;
13036
13037 info = inf;
13038 htab = ppc_hash_table (info);
13039 if (htab == NULL)
13040 return FALSE;
13041
13042 s = htab->global_entry;
13043 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13044 if (pent->plt.offset != (bfd_vma) -1
13045 && pent->addend == 0)
13046 {
13047 bfd_byte *p;
13048 asection *plt;
13049 bfd_vma off;
13050
13051 p = s->contents + h->root.u.def.value;
13052 plt = htab->elf.splt;
13053 if (!htab->elf.dynamic_sections_created
13054 || h->dynindx == -1)
13055 plt = htab->elf.iplt;
13056 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13057 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13058
13059 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13060 {
13061 info->callbacks->einfo
13062 (_("%P: linkage table error against `%pT'\n"),
13063 h->root.root.string);
13064 bfd_set_error (bfd_error_bad_value);
13065 htab->stub_error = TRUE;
13066 }
13067
13068 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13069 if (htab->params->emit_stub_syms)
13070 {
13071 size_t len = strlen (h->root.root.string);
13072 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13073
13074 if (name == NULL)
13075 return FALSE;
13076
13077 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13078 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13079 if (h == NULL)
13080 return FALSE;
13081 if (h->root.type == bfd_link_hash_new)
13082 {
13083 h->root.type = bfd_link_hash_defined;
13084 h->root.u.def.section = s;
13085 h->root.u.def.value = p - s->contents;
13086 h->ref_regular = 1;
13087 h->def_regular = 1;
13088 h->ref_regular_nonweak = 1;
13089 h->forced_local = 1;
13090 h->non_elf = 0;
13091 h->root.linker_def = 1;
13092 }
13093 }
13094
13095 if (PPC_HA (off) != 0)
13096 {
13097 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13098 p += 4;
13099 }
13100 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13101 p += 4;
13102 bfd_put_32 (s->owner, MTCTR_R12, p);
13103 p += 4;
13104 bfd_put_32 (s->owner, BCTR, p);
13105 break;
13106 }
13107 return TRUE;
13108 }
13109
13110 /* Build all the stubs associated with the current output file.
13111 The stubs are kept in a hash table attached to the main linker
13112 hash table. This function is called via gldelf64ppc_finish. */
13113
13114 bfd_boolean
13115 ppc64_elf_build_stubs (struct bfd_link_info *info,
13116 char **stats)
13117 {
13118 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13119 struct map_stub *group;
13120 asection *stub_sec;
13121 bfd_byte *p;
13122 int stub_sec_count = 0;
13123
13124 if (htab == NULL)
13125 return FALSE;
13126
13127 /* Allocate memory to hold the linker stubs. */
13128 for (group = htab->group; group != NULL; group = group->next)
13129 if ((stub_sec = group->stub_sec) != NULL
13130 && stub_sec->size != 0)
13131 {
13132 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13133 if (stub_sec->contents == NULL)
13134 return FALSE;
13135 stub_sec->size = 0;
13136 }
13137
13138 if (htab->glink != NULL && htab->glink->size != 0)
13139 {
13140 unsigned int indx;
13141 bfd_vma plt0;
13142
13143 /* Build the .glink plt call stub. */
13144 if (htab->params->emit_stub_syms)
13145 {
13146 struct elf_link_hash_entry *h;
13147 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13148 TRUE, FALSE, FALSE);
13149 if (h == NULL)
13150 return FALSE;
13151 if (h->root.type == bfd_link_hash_new)
13152 {
13153 h->root.type = bfd_link_hash_defined;
13154 h->root.u.def.section = htab->glink;
13155 h->root.u.def.value = 8;
13156 h->ref_regular = 1;
13157 h->def_regular = 1;
13158 h->ref_regular_nonweak = 1;
13159 h->forced_local = 1;
13160 h->non_elf = 0;
13161 h->root.linker_def = 1;
13162 }
13163 }
13164 plt0 = (htab->elf.splt->output_section->vma
13165 + htab->elf.splt->output_offset
13166 - 16);
13167 if (info->emitrelocations)
13168 {
13169 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13170 if (r == NULL)
13171 return FALSE;
13172 r->r_offset = (htab->glink->output_offset
13173 + htab->glink->output_section->vma);
13174 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13175 r->r_addend = plt0;
13176 }
13177 p = htab->glink->contents;
13178 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13179 bfd_put_64 (htab->glink->owner, plt0, p);
13180 p += 8;
13181 if (htab->opd_abi)
13182 {
13183 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13184 p += 4;
13185 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13186 p += 4;
13187 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13188 p += 4;
13189 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13190 p += 4;
13191 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13192 p += 4;
13193 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13194 p += 4;
13195 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13196 p += 4;
13197 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13198 p += 4;
13199 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13200 p += 4;
13201 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13202 p += 4;
13203 }
13204 else
13205 {
13206 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13207 p += 4;
13208 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13209 p += 4;
13210 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13211 p += 4;
13212 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13213 p += 4;
13214 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13215 p += 4;
13216 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13217 p += 4;
13218 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13219 p += 4;
13220 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13221 p += 4;
13222 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13223 p += 4;
13224 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13225 p += 4;
13226 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13227 p += 4;
13228 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13229 p += 4;
13230 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13231 p += 4;
13232 }
13233 bfd_put_32 (htab->glink->owner, BCTR, p);
13234 p += 4;
13235 BFD_ASSERT (p == htab->glink->contents + GLINK_PLTRESOLVE_SIZE (htab));
13236
13237 /* Build the .glink lazy link call stubs. */
13238 indx = 0;
13239 while (p < htab->glink->contents + htab->glink->size)
13240 {
13241 if (htab->opd_abi)
13242 {
13243 if (indx < 0x8000)
13244 {
13245 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13246 p += 4;
13247 }
13248 else
13249 {
13250 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13251 p += 4;
13252 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13253 p);
13254 p += 4;
13255 }
13256 }
13257 bfd_put_32 (htab->glink->owner,
13258 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13259 indx++;
13260 p += 4;
13261 }
13262 }
13263
13264 /* Build .glink global entry stubs. */
13265 if (htab->global_entry != NULL && htab->global_entry->size != 0)
13266 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13267
13268 if (htab->brlt != NULL && htab->brlt->size != 0)
13269 {
13270 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13271 htab->brlt->size);
13272 if (htab->brlt->contents == NULL)
13273 return FALSE;
13274 }
13275 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13276 {
13277 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13278 htab->relbrlt->size);
13279 if (htab->relbrlt->contents == NULL)
13280 return FALSE;
13281 }
13282
13283 /* Build the stubs as directed by the stub hash table. */
13284 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13285
13286 for (group = htab->group; group != NULL; group = group->next)
13287 if (group->needs_save_res)
13288 group->stub_sec->size += htab->sfpr->size;
13289
13290 if (htab->relbrlt != NULL)
13291 htab->relbrlt->reloc_count = 0;
13292
13293 if (htab->params->plt_stub_align != 0)
13294 for (group = htab->group; group != NULL; group = group->next)
13295 if ((stub_sec = group->stub_sec) != NULL)
13296 {
13297 int align = abs (htab->params->plt_stub_align);
13298 stub_sec->size = (stub_sec->size + (1 << align) - 1) & -(1 << align);
13299 }
13300
13301 for (group = htab->group; group != NULL; group = group->next)
13302 if (group->needs_save_res)
13303 {
13304 stub_sec = group->stub_sec;
13305 memcpy (stub_sec->contents + stub_sec->size - htab->sfpr->size,
13306 htab->sfpr->contents, htab->sfpr->size);
13307 if (htab->params->emit_stub_syms)
13308 {
13309 unsigned int i;
13310
13311 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13312 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13313 return FALSE;
13314 }
13315 }
13316
13317 for (group = htab->group; group != NULL; group = group->next)
13318 if ((stub_sec = group->stub_sec) != NULL)
13319 {
13320 stub_sec_count += 1;
13321 if (stub_sec->rawsize != stub_sec->size
13322 && (htab->stub_iteration <= STUB_SHRINK_ITER
13323 || stub_sec->rawsize < stub_sec->size))
13324 break;
13325 }
13326
13327 if (group != NULL)
13328 {
13329 htab->stub_error = TRUE;
13330 _bfd_error_handler (_("stubs don't match calculated size"));
13331 }
13332
13333 if (htab->stub_error)
13334 return FALSE;
13335
13336 if (stats != NULL)
13337 {
13338 size_t len;
13339 *stats = bfd_malloc (500);
13340 if (*stats == NULL)
13341 return FALSE;
13342
13343 len = sprintf (*stats,
13344 ngettext ("linker stubs in %u group\n",
13345 "linker stubs in %u groups\n",
13346 stub_sec_count),
13347 stub_sec_count);
13348 sprintf (*stats + len, _(" branch %lu\n"
13349 " toc adjust %lu\n"
13350 " long branch %lu\n"
13351 " long toc adj %lu\n"
13352 " plt call %lu\n"
13353 " plt call toc %lu\n"
13354 " global entry %lu"),
13355 htab->stub_count[ppc_stub_long_branch - 1],
13356 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13357 htab->stub_count[ppc_stub_plt_branch - 1],
13358 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13359 htab->stub_count[ppc_stub_plt_call - 1],
13360 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13361 htab->stub_count[ppc_stub_global_entry - 1]);
13362 }
13363 return TRUE;
13364 }
13365
13366 /* What to do when ld finds relocations against symbols defined in
13367 discarded sections. */
13368
13369 static unsigned int
13370 ppc64_elf_action_discarded (asection *sec)
13371 {
13372 if (strcmp (".opd", sec->name) == 0)
13373 return 0;
13374
13375 if (strcmp (".toc", sec->name) == 0)
13376 return 0;
13377
13378 if (strcmp (".toc1", sec->name) == 0)
13379 return 0;
13380
13381 return _bfd_elf_default_action_discarded (sec);
13382 }
13383
13384 /* The RELOCATE_SECTION function is called by the ELF backend linker
13385 to handle the relocations for a section.
13386
13387 The relocs are always passed as Rela structures; if the section
13388 actually uses Rel structures, the r_addend field will always be
13389 zero.
13390
13391 This function is responsible for adjust the section contents as
13392 necessary, and (if using Rela relocs and generating a
13393 relocatable output file) adjusting the reloc addend as
13394 necessary.
13395
13396 This function does not have to worry about setting the reloc
13397 address or the reloc symbol index.
13398
13399 LOCAL_SYMS is a pointer to the swapped in local symbols.
13400
13401 LOCAL_SECTIONS is an array giving the section in the input file
13402 corresponding to the st_shndx field of each local symbol.
13403
13404 The global hash table entry for the global symbols can be found
13405 via elf_sym_hashes (input_bfd).
13406
13407 When generating relocatable output, this function must handle
13408 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13409 going to be the section symbol corresponding to the output
13410 section, which means that the addend must be adjusted
13411 accordingly. */
13412
13413 static bfd_boolean
13414 ppc64_elf_relocate_section (bfd *output_bfd,
13415 struct bfd_link_info *info,
13416 bfd *input_bfd,
13417 asection *input_section,
13418 bfd_byte *contents,
13419 Elf_Internal_Rela *relocs,
13420 Elf_Internal_Sym *local_syms,
13421 asection **local_sections)
13422 {
13423 struct ppc_link_hash_table *htab;
13424 Elf_Internal_Shdr *symtab_hdr;
13425 struct elf_link_hash_entry **sym_hashes;
13426 Elf_Internal_Rela *rel;
13427 Elf_Internal_Rela *wrel;
13428 Elf_Internal_Rela *relend;
13429 Elf_Internal_Rela outrel;
13430 bfd_byte *loc;
13431 struct got_entry **local_got_ents;
13432 bfd_vma TOCstart;
13433 bfd_boolean ret = TRUE;
13434 bfd_boolean is_opd;
13435 /* Assume 'at' branch hints. */
13436 bfd_boolean is_isa_v2 = TRUE;
13437 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13438
13439 /* Initialize howto table if needed. */
13440 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13441 ppc_howto_init ();
13442
13443 htab = ppc_hash_table (info);
13444 if (htab == NULL)
13445 return FALSE;
13446
13447 /* Don't relocate stub sections. */
13448 if (input_section->owner == htab->params->stub_bfd)
13449 return TRUE;
13450
13451 BFD_ASSERT (is_ppc64_elf (input_bfd));
13452
13453 local_got_ents = elf_local_got_ents (input_bfd);
13454 TOCstart = elf_gp (output_bfd);
13455 symtab_hdr = &elf_symtab_hdr (input_bfd);
13456 sym_hashes = elf_sym_hashes (input_bfd);
13457 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13458
13459 rel = wrel = relocs;
13460 relend = relocs + input_section->reloc_count;
13461 for (; rel < relend; wrel++, rel++)
13462 {
13463 enum elf_ppc64_reloc_type r_type;
13464 bfd_vma addend;
13465 bfd_reloc_status_type r;
13466 Elf_Internal_Sym *sym;
13467 asection *sec;
13468 struct elf_link_hash_entry *h_elf;
13469 struct ppc_link_hash_entry *h;
13470 struct ppc_link_hash_entry *fdh;
13471 const char *sym_name;
13472 unsigned long r_symndx, toc_symndx;
13473 bfd_vma toc_addend;
13474 unsigned char tls_mask, tls_gd, tls_type;
13475 unsigned char sym_type;
13476 bfd_vma relocation;
13477 bfd_boolean unresolved_reloc;
13478 bfd_boolean warned;
13479 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13480 unsigned int insn;
13481 unsigned int mask;
13482 struct ppc_stub_hash_entry *stub_entry;
13483 bfd_vma max_br_offset;
13484 bfd_vma from;
13485 Elf_Internal_Rela orig_rel;
13486 reloc_howto_type *howto;
13487 struct reloc_howto_struct alt_howto;
13488
13489 again:
13490 orig_rel = *rel;
13491
13492 r_type = ELF64_R_TYPE (rel->r_info);
13493 r_symndx = ELF64_R_SYM (rel->r_info);
13494
13495 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13496 symbol of the previous ADDR64 reloc. The symbol gives us the
13497 proper TOC base to use. */
13498 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13499 && wrel != relocs
13500 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13501 && is_opd)
13502 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13503
13504 sym = NULL;
13505 sec = NULL;
13506 h_elf = NULL;
13507 sym_name = NULL;
13508 unresolved_reloc = FALSE;
13509 warned = FALSE;
13510
13511 if (r_symndx < symtab_hdr->sh_info)
13512 {
13513 /* It's a local symbol. */
13514 struct _opd_sec_data *opd;
13515
13516 sym = local_syms + r_symndx;
13517 sec = local_sections[r_symndx];
13518 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13519 sym_type = ELF64_ST_TYPE (sym->st_info);
13520 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13521 opd = get_opd_info (sec);
13522 if (opd != NULL && opd->adjust != NULL)
13523 {
13524 long adjust = opd->adjust[OPD_NDX (sym->st_value
13525 + rel->r_addend)];
13526 if (adjust == -1)
13527 relocation = 0;
13528 else
13529 {
13530 /* If this is a relocation against the opd section sym
13531 and we have edited .opd, adjust the reloc addend so
13532 that ld -r and ld --emit-relocs output is correct.
13533 If it is a reloc against some other .opd symbol,
13534 then the symbol value will be adjusted later. */
13535 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13536 rel->r_addend += adjust;
13537 else
13538 relocation += adjust;
13539 }
13540 }
13541 }
13542 else
13543 {
13544 bfd_boolean ignored;
13545
13546 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13547 r_symndx, symtab_hdr, sym_hashes,
13548 h_elf, sec, relocation,
13549 unresolved_reloc, warned, ignored);
13550 sym_name = h_elf->root.root.string;
13551 sym_type = h_elf->type;
13552 if (sec != NULL
13553 && sec->owner == output_bfd
13554 && strcmp (sec->name, ".opd") == 0)
13555 {
13556 /* This is a symbol defined in a linker script. All
13557 such are defined in output sections, even those
13558 defined by simple assignment from a symbol defined in
13559 an input section. Transfer the symbol to an
13560 appropriate input .opd section, so that a branch to
13561 this symbol will be mapped to the location specified
13562 by the opd entry. */
13563 struct bfd_link_order *lo;
13564 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13565 if (lo->type == bfd_indirect_link_order)
13566 {
13567 asection *isec = lo->u.indirect.section;
13568 if (h_elf->root.u.def.value >= isec->output_offset
13569 && h_elf->root.u.def.value < (isec->output_offset
13570 + isec->size))
13571 {
13572 h_elf->root.u.def.value -= isec->output_offset;
13573 h_elf->root.u.def.section = isec;
13574 sec = isec;
13575 break;
13576 }
13577 }
13578 }
13579 }
13580 h = (struct ppc_link_hash_entry *) h_elf;
13581
13582 if (sec != NULL && discarded_section (sec))
13583 {
13584 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13585 input_bfd, input_section,
13586 contents + rel->r_offset);
13587 wrel->r_offset = rel->r_offset;
13588 wrel->r_info = 0;
13589 wrel->r_addend = 0;
13590
13591 /* For ld -r, remove relocations in debug sections against
13592 symbols defined in discarded sections. Not done for
13593 non-debug to preserve relocs in .eh_frame which the
13594 eh_frame editing code expects to be present. */
13595 if (bfd_link_relocatable (info)
13596 && (input_section->flags & SEC_DEBUGGING))
13597 wrel--;
13598
13599 continue;
13600 }
13601
13602 if (bfd_link_relocatable (info))
13603 goto copy_reloc;
13604
13605 if (h != NULL && &h->elf == htab->elf.hgot)
13606 {
13607 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13608 sec = bfd_abs_section_ptr;
13609 unresolved_reloc = FALSE;
13610 }
13611
13612 /* TLS optimizations. Replace instruction sequences and relocs
13613 based on information we collected in tls_optimize. We edit
13614 RELOCS so that --emit-relocs will output something sensible
13615 for the final instruction stream. */
13616 tls_mask = 0;
13617 tls_gd = 0;
13618 toc_symndx = 0;
13619 if (h != NULL)
13620 tls_mask = h->tls_mask;
13621 else if (local_got_ents != NULL)
13622 {
13623 struct plt_entry **local_plt = (struct plt_entry **)
13624 (local_got_ents + symtab_hdr->sh_info);
13625 unsigned char *lgot_masks = (unsigned char *)
13626 (local_plt + symtab_hdr->sh_info);
13627 tls_mask = lgot_masks[r_symndx];
13628 }
13629 if (((tls_mask & TLS_TLS) == 0 || tls_mask == (TLS_TLS | TLS_MARK))
13630 && (r_type == R_PPC64_TLS
13631 || r_type == R_PPC64_TLSGD
13632 || r_type == R_PPC64_TLSLD))
13633 {
13634 /* Check for toc tls entries. */
13635 unsigned char *toc_tls;
13636
13637 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13638 &local_syms, rel, input_bfd))
13639 return FALSE;
13640
13641 if (toc_tls)
13642 tls_mask = *toc_tls;
13643 }
13644
13645 /* Check that tls relocs are used with tls syms, and non-tls
13646 relocs are used with non-tls syms. */
13647 if (r_symndx != STN_UNDEF
13648 && r_type != R_PPC64_NONE
13649 && (h == NULL
13650 || h->elf.root.type == bfd_link_hash_defined
13651 || h->elf.root.type == bfd_link_hash_defweak)
13652 && (IS_PPC64_TLS_RELOC (r_type)
13653 != (sym_type == STT_TLS
13654 || (sym_type == STT_SECTION
13655 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13656 {
13657 if ((tls_mask & TLS_TLS) != 0
13658 && (r_type == R_PPC64_TLS
13659 || r_type == R_PPC64_TLSGD
13660 || r_type == R_PPC64_TLSLD))
13661 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13662 ;
13663 else
13664 info->callbacks->einfo
13665 (!IS_PPC64_TLS_RELOC (r_type)
13666 /* xgettext:c-format */
13667 ? _("%H: %s used with TLS symbol `%pT'\n")
13668 /* xgettext:c-format */
13669 : _("%H: %s used with non-TLS symbol `%pT'\n"),
13670 input_bfd, input_section, rel->r_offset,
13671 ppc64_elf_howto_table[r_type]->name,
13672 sym_name);
13673 }
13674
13675 /* Ensure reloc mapping code below stays sane. */
13676 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13677 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13678 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13679 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13680 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13681 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13682 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13683 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13684 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13685 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13686 abort ();
13687
13688 switch (r_type)
13689 {
13690 default:
13691 break;
13692
13693 case R_PPC64_LO_DS_OPT:
13694 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13695 if ((insn & (0x3f << 26)) != 58u << 26)
13696 abort ();
13697 insn += (14u << 26) - (58u << 26);
13698 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13699 r_type = R_PPC64_TOC16_LO;
13700 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13701 break;
13702
13703 case R_PPC64_TOC16:
13704 case R_PPC64_TOC16_LO:
13705 case R_PPC64_TOC16_DS:
13706 case R_PPC64_TOC16_LO_DS:
13707 {
13708 /* Check for toc tls entries. */
13709 unsigned char *toc_tls;
13710 int retval;
13711
13712 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13713 &local_syms, rel, input_bfd);
13714 if (retval == 0)
13715 return FALSE;
13716
13717 if (toc_tls)
13718 {
13719 tls_mask = *toc_tls;
13720 if (r_type == R_PPC64_TOC16_DS
13721 || r_type == R_PPC64_TOC16_LO_DS)
13722 {
13723 if ((tls_mask & TLS_TLS) != 0
13724 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13725 goto toctprel;
13726 }
13727 else
13728 {
13729 /* If we found a GD reloc pair, then we might be
13730 doing a GD->IE transition. */
13731 if (retval == 2)
13732 {
13733 tls_gd = TLS_TPRELGD;
13734 if ((tls_mask & TLS_TLS) != 0
13735 && (tls_mask & TLS_GD) == 0)
13736 goto tls_ldgd_opt;
13737 }
13738 else if (retval == 3)
13739 {
13740 if ((tls_mask & TLS_TLS) != 0
13741 && (tls_mask & TLS_LD) == 0)
13742 goto tls_ldgd_opt;
13743 }
13744 }
13745 }
13746 }
13747 break;
13748
13749 case R_PPC64_GOT_TPREL16_HI:
13750 case R_PPC64_GOT_TPREL16_HA:
13751 if ((tls_mask & TLS_TLS) != 0
13752 && (tls_mask & TLS_TPREL) == 0)
13753 {
13754 rel->r_offset -= d_offset;
13755 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13756 r_type = R_PPC64_NONE;
13757 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13758 }
13759 break;
13760
13761 case R_PPC64_GOT_TPREL16_DS:
13762 case R_PPC64_GOT_TPREL16_LO_DS:
13763 if ((tls_mask & TLS_TLS) != 0
13764 && (tls_mask & TLS_TPREL) == 0)
13765 {
13766 toctprel:
13767 insn = bfd_get_32 (input_bfd,
13768 contents + rel->r_offset - d_offset);
13769 insn &= 31 << 21;
13770 insn |= 0x3c0d0000; /* addis 0,13,0 */
13771 bfd_put_32 (input_bfd, insn,
13772 contents + rel->r_offset - d_offset);
13773 r_type = R_PPC64_TPREL16_HA;
13774 if (toc_symndx != 0)
13775 {
13776 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13777 rel->r_addend = toc_addend;
13778 /* We changed the symbol. Start over in order to
13779 get h, sym, sec etc. right. */
13780 goto again;
13781 }
13782 else
13783 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13784 }
13785 break;
13786
13787 case R_PPC64_TLS:
13788 if ((tls_mask & TLS_TLS) != 0
13789 && (tls_mask & TLS_TPREL) == 0)
13790 {
13791 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13792 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13793 if (insn == 0)
13794 abort ();
13795 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13796 /* Was PPC64_TLS which sits on insn boundary, now
13797 PPC64_TPREL16_LO which is at low-order half-word. */
13798 rel->r_offset += d_offset;
13799 r_type = R_PPC64_TPREL16_LO;
13800 if (toc_symndx != 0)
13801 {
13802 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13803 rel->r_addend = toc_addend;
13804 /* We changed the symbol. Start over in order to
13805 get h, sym, sec etc. right. */
13806 goto again;
13807 }
13808 else
13809 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13810 }
13811 break;
13812
13813 case R_PPC64_GOT_TLSGD16_HI:
13814 case R_PPC64_GOT_TLSGD16_HA:
13815 tls_gd = TLS_TPRELGD;
13816 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
13817 goto tls_gdld_hi;
13818 break;
13819
13820 case R_PPC64_GOT_TLSLD16_HI:
13821 case R_PPC64_GOT_TLSLD16_HA:
13822 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
13823 {
13824 tls_gdld_hi:
13825 if ((tls_mask & tls_gd) != 0)
13826 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13827 + R_PPC64_GOT_TPREL16_DS);
13828 else
13829 {
13830 rel->r_offset -= d_offset;
13831 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13832 r_type = R_PPC64_NONE;
13833 }
13834 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13835 }
13836 break;
13837
13838 case R_PPC64_GOT_TLSGD16:
13839 case R_PPC64_GOT_TLSGD16_LO:
13840 tls_gd = TLS_TPRELGD;
13841 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
13842 goto tls_ldgd_opt;
13843 break;
13844
13845 case R_PPC64_GOT_TLSLD16:
13846 case R_PPC64_GOT_TLSLD16_LO:
13847 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
13848 {
13849 unsigned int insn1, insn2;
13850 bfd_vma offset;
13851
13852 tls_ldgd_opt:
13853 offset = (bfd_vma) -1;
13854 /* If not using the newer R_PPC64_TLSGD/LD to mark
13855 __tls_get_addr calls, we must trust that the call
13856 stays with its arg setup insns, ie. that the next
13857 reloc is the __tls_get_addr call associated with
13858 the current reloc. Edit both insns. */
13859 if (input_section->has_tls_get_addr_call
13860 && rel + 1 < relend
13861 && branch_reloc_hash_match (input_bfd, rel + 1,
13862 htab->tls_get_addr,
13863 htab->tls_get_addr_fd))
13864 offset = rel[1].r_offset;
13865 /* We read the low GOT_TLS (or TOC16) insn because we
13866 need to keep the destination reg. It may be
13867 something other than the usual r3, and moved to r3
13868 before the call by intervening code. */
13869 insn1 = bfd_get_32 (input_bfd,
13870 contents + rel->r_offset - d_offset);
13871 if ((tls_mask & tls_gd) != 0)
13872 {
13873 /* IE */
13874 insn1 &= (0x1f << 21) | (0x1f << 16);
13875 insn1 |= 58 << 26; /* ld */
13876 insn2 = 0x7c636a14; /* add 3,3,13 */
13877 if (offset != (bfd_vma) -1)
13878 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13879 if ((tls_mask & TLS_EXPLICIT) == 0)
13880 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13881 + R_PPC64_GOT_TPREL16_DS);
13882 else
13883 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13884 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13885 }
13886 else
13887 {
13888 /* LE */
13889 insn1 &= 0x1f << 21;
13890 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13891 insn2 = 0x38630000; /* addi 3,3,0 */
13892 if (tls_gd == 0)
13893 {
13894 /* Was an LD reloc. */
13895 if (toc_symndx)
13896 sec = local_sections[toc_symndx];
13897 for (r_symndx = 0;
13898 r_symndx < symtab_hdr->sh_info;
13899 r_symndx++)
13900 if (local_sections[r_symndx] == sec)
13901 break;
13902 if (r_symndx >= symtab_hdr->sh_info)
13903 r_symndx = STN_UNDEF;
13904 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13905 if (r_symndx != STN_UNDEF)
13906 rel->r_addend -= (local_syms[r_symndx].st_value
13907 + sec->output_offset
13908 + sec->output_section->vma);
13909 }
13910 else if (toc_symndx != 0)
13911 {
13912 r_symndx = toc_symndx;
13913 rel->r_addend = toc_addend;
13914 }
13915 r_type = R_PPC64_TPREL16_HA;
13916 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13917 if (offset != (bfd_vma) -1)
13918 {
13919 rel[1].r_info = ELF64_R_INFO (r_symndx,
13920 R_PPC64_TPREL16_LO);
13921 rel[1].r_offset = offset + d_offset;
13922 rel[1].r_addend = rel->r_addend;
13923 }
13924 }
13925 bfd_put_32 (input_bfd, insn1,
13926 contents + rel->r_offset - d_offset);
13927 if (offset != (bfd_vma) -1)
13928 bfd_put_32 (input_bfd, insn2, contents + offset);
13929 if ((tls_mask & tls_gd) == 0
13930 && (tls_gd == 0 || toc_symndx != 0))
13931 {
13932 /* We changed the symbol. Start over in order
13933 to get h, sym, sec etc. right. */
13934 goto again;
13935 }
13936 }
13937 break;
13938
13939 case R_PPC64_TLSGD:
13940 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
13941 && rel + 1 < relend)
13942 {
13943 unsigned int insn2;
13944 bfd_vma offset = rel->r_offset;
13945
13946 if ((tls_mask & TLS_TPRELGD) != 0)
13947 {
13948 /* IE */
13949 r_type = R_PPC64_NONE;
13950 insn2 = 0x7c636a14; /* add 3,3,13 */
13951 }
13952 else
13953 {
13954 /* LE */
13955 if (toc_symndx != 0)
13956 {
13957 r_symndx = toc_symndx;
13958 rel->r_addend = toc_addend;
13959 }
13960 r_type = R_PPC64_TPREL16_LO;
13961 rel->r_offset = offset + d_offset;
13962 insn2 = 0x38630000; /* addi 3,3,0 */
13963 }
13964 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13965 /* Zap the reloc on the _tls_get_addr call too. */
13966 BFD_ASSERT (offset == rel[1].r_offset);
13967 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13968 bfd_put_32 (input_bfd, insn2, contents + offset);
13969 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13970 goto again;
13971 }
13972 break;
13973
13974 case R_PPC64_TLSLD:
13975 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
13976 && rel + 1 < relend)
13977 {
13978 unsigned int insn2;
13979 bfd_vma offset = rel->r_offset;
13980
13981 if (toc_symndx)
13982 sec = local_sections[toc_symndx];
13983 for (r_symndx = 0;
13984 r_symndx < symtab_hdr->sh_info;
13985 r_symndx++)
13986 if (local_sections[r_symndx] == sec)
13987 break;
13988 if (r_symndx >= symtab_hdr->sh_info)
13989 r_symndx = STN_UNDEF;
13990 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13991 if (r_symndx != STN_UNDEF)
13992 rel->r_addend -= (local_syms[r_symndx].st_value
13993 + sec->output_offset
13994 + sec->output_section->vma);
13995
13996 r_type = R_PPC64_TPREL16_LO;
13997 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13998 rel->r_offset = offset + d_offset;
13999 /* Zap the reloc on the _tls_get_addr call too. */
14000 BFD_ASSERT (offset == rel[1].r_offset);
14001 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14002 insn2 = 0x38630000; /* addi 3,3,0 */
14003 bfd_put_32 (input_bfd, insn2, contents + offset);
14004 goto again;
14005 }
14006 break;
14007
14008 case R_PPC64_DTPMOD64:
14009 if (rel + 1 < relend
14010 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14011 && rel[1].r_offset == rel->r_offset + 8)
14012 {
14013 if ((tls_mask & TLS_GD) == 0)
14014 {
14015 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14016 if ((tls_mask & TLS_TPRELGD) != 0)
14017 r_type = R_PPC64_TPREL64;
14018 else
14019 {
14020 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14021 r_type = R_PPC64_NONE;
14022 }
14023 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14024 }
14025 }
14026 else
14027 {
14028 if ((tls_mask & TLS_LD) == 0)
14029 {
14030 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14031 r_type = R_PPC64_NONE;
14032 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14033 }
14034 }
14035 break;
14036
14037 case R_PPC64_TPREL64:
14038 if ((tls_mask & TLS_TPREL) == 0)
14039 {
14040 r_type = R_PPC64_NONE;
14041 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14042 }
14043 break;
14044
14045 case R_PPC64_ENTRY:
14046 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14047 if (!bfd_link_pic (info)
14048 && !info->traditional_format
14049 && relocation + 0x80008000 <= 0xffffffff)
14050 {
14051 unsigned int insn1, insn2;
14052
14053 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14054 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14055 if ((insn1 & ~0xfffc) == LD_R2_0R12
14056 && insn2 == ADD_R2_R2_R12)
14057 {
14058 bfd_put_32 (input_bfd,
14059 LIS_R2 + PPC_HA (relocation),
14060 contents + rel->r_offset);
14061 bfd_put_32 (input_bfd,
14062 ADDI_R2_R2 + PPC_LO (relocation),
14063 contents + rel->r_offset + 4);
14064 }
14065 }
14066 else
14067 {
14068 relocation -= (rel->r_offset
14069 + input_section->output_offset
14070 + input_section->output_section->vma);
14071 if (relocation + 0x80008000 <= 0xffffffff)
14072 {
14073 unsigned int insn1, insn2;
14074
14075 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14076 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14077 if ((insn1 & ~0xfffc) == LD_R2_0R12
14078 && insn2 == ADD_R2_R2_R12)
14079 {
14080 bfd_put_32 (input_bfd,
14081 ADDIS_R2_R12 + PPC_HA (relocation),
14082 contents + rel->r_offset);
14083 bfd_put_32 (input_bfd,
14084 ADDI_R2_R2 + PPC_LO (relocation),
14085 contents + rel->r_offset + 4);
14086 }
14087 }
14088 }
14089 break;
14090
14091 case R_PPC64_REL16_HA:
14092 /* If we are generating a non-PIC executable, edit
14093 . 0: addis 2,12,.TOC.-0b@ha
14094 . addi 2,2,.TOC.-0b@l
14095 used by ELFv2 global entry points to set up r2, to
14096 . lis 2,.TOC.@ha
14097 . addi 2,2,.TOC.@l
14098 if .TOC. is in range. */
14099 if (!bfd_link_pic (info)
14100 && !info->traditional_format
14101 && !htab->opd_abi
14102 && rel->r_addend == d_offset
14103 && h != NULL && &h->elf == htab->elf.hgot
14104 && rel + 1 < relend
14105 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14106 && rel[1].r_offset == rel->r_offset + 4
14107 && rel[1].r_addend == rel->r_addend + 4
14108 && relocation + 0x80008000 <= 0xffffffff)
14109 {
14110 unsigned int insn1, insn2;
14111 bfd_vma offset = rel->r_offset - d_offset;
14112 insn1 = bfd_get_32 (input_bfd, contents + offset);
14113 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14114 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14115 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14116 {
14117 r_type = R_PPC64_ADDR16_HA;
14118 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14119 rel->r_addend -= d_offset;
14120 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14121 rel[1].r_addend -= d_offset + 4;
14122 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14123 }
14124 }
14125 break;
14126 }
14127
14128 /* Handle other relocations that tweak non-addend part of insn. */
14129 insn = 0;
14130 max_br_offset = 1 << 25;
14131 addend = rel->r_addend;
14132 reloc_dest = DEST_NORMAL;
14133 switch (r_type)
14134 {
14135 default:
14136 break;
14137
14138 case R_PPC64_TOCSAVE:
14139 if (relocation + addend == (rel->r_offset
14140 + input_section->output_offset
14141 + input_section->output_section->vma)
14142 && tocsave_find (htab, NO_INSERT,
14143 &local_syms, rel, input_bfd))
14144 {
14145 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14146 if (insn == NOP
14147 || insn == CROR_151515 || insn == CROR_313131)
14148 bfd_put_32 (input_bfd,
14149 STD_R2_0R1 + STK_TOC (htab),
14150 contents + rel->r_offset);
14151 }
14152 break;
14153
14154 /* Branch taken prediction relocations. */
14155 case R_PPC64_ADDR14_BRTAKEN:
14156 case R_PPC64_REL14_BRTAKEN:
14157 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14158 /* Fall through. */
14159
14160 /* Branch not taken prediction relocations. */
14161 case R_PPC64_ADDR14_BRNTAKEN:
14162 case R_PPC64_REL14_BRNTAKEN:
14163 insn |= bfd_get_32 (input_bfd,
14164 contents + rel->r_offset) & ~(0x01 << 21);
14165 /* Fall through. */
14166
14167 case R_PPC64_REL14:
14168 max_br_offset = 1 << 15;
14169 /* Fall through. */
14170
14171 case R_PPC64_REL24:
14172 /* Calls to functions with a different TOC, such as calls to
14173 shared objects, need to alter the TOC pointer. This is
14174 done using a linkage stub. A REL24 branching to these
14175 linkage stubs needs to be followed by a nop, as the nop
14176 will be replaced with an instruction to restore the TOC
14177 base pointer. */
14178 fdh = h;
14179 if (h != NULL
14180 && h->oh != NULL
14181 && h->oh->is_func_descriptor)
14182 fdh = ppc_follow_link (h->oh);
14183 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14184 htab);
14185 if (stub_entry != NULL
14186 && (stub_entry->stub_type == ppc_stub_plt_call
14187 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14188 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14189 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14190 {
14191 bfd_boolean can_plt_call = FALSE;
14192
14193 if (stub_entry->stub_type == ppc_stub_plt_call
14194 && !htab->opd_abi
14195 && htab->params->plt_localentry0 != 0
14196 && is_elfv2_localentry0 (&h->elf))
14197 {
14198 /* The function doesn't use or change r2. */
14199 can_plt_call = TRUE;
14200 }
14201
14202 /* All of these stubs may modify r2, so there must be a
14203 branch and link followed by a nop. The nop is
14204 replaced by an insn to restore r2. */
14205 else if (rel->r_offset + 8 <= input_section->size)
14206 {
14207 unsigned long br;
14208
14209 br = bfd_get_32 (input_bfd,
14210 contents + rel->r_offset);
14211 if ((br & 1) != 0)
14212 {
14213 unsigned long nop;
14214
14215 nop = bfd_get_32 (input_bfd,
14216 contents + rel->r_offset + 4);
14217 if (nop == NOP
14218 || nop == CROR_151515 || nop == CROR_313131)
14219 {
14220 if (h != NULL
14221 && (h == htab->tls_get_addr_fd
14222 || h == htab->tls_get_addr)
14223 && htab->params->tls_get_addr_opt)
14224 {
14225 /* Special stub used, leave nop alone. */
14226 }
14227 else
14228 bfd_put_32 (input_bfd,
14229 LD_R2_0R1 + STK_TOC (htab),
14230 contents + rel->r_offset + 4);
14231 can_plt_call = TRUE;
14232 }
14233 }
14234 }
14235
14236 if (!can_plt_call && h != NULL)
14237 {
14238 const char *name = h->elf.root.root.string;
14239
14240 if (*name == '.')
14241 ++name;
14242
14243 if (strncmp (name, "__libc_start_main", 17) == 0
14244 && (name[17] == 0 || name[17] == '@'))
14245 {
14246 /* Allow crt1 branch to go via a toc adjusting
14247 stub. Other calls that never return could do
14248 the same, if we could detect such. */
14249 can_plt_call = TRUE;
14250 }
14251 }
14252
14253 if (!can_plt_call)
14254 {
14255 /* g++ as of 20130507 emits self-calls without a
14256 following nop. This is arguably wrong since we
14257 have conflicting information. On the one hand a
14258 global symbol and on the other a local call
14259 sequence, but don't error for this special case.
14260 It isn't possible to cheaply verify we have
14261 exactly such a call. Allow all calls to the same
14262 section. */
14263 asection *code_sec = sec;
14264
14265 if (get_opd_info (sec) != NULL)
14266 {
14267 bfd_vma off = (relocation + addend
14268 - sec->output_section->vma
14269 - sec->output_offset);
14270
14271 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14272 }
14273 if (code_sec == input_section)
14274 can_plt_call = TRUE;
14275 }
14276
14277 if (!can_plt_call)
14278 {
14279 if (stub_entry->stub_type == ppc_stub_plt_call
14280 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14281 info->callbacks->einfo
14282 /* xgettext:c-format */
14283 (_("%H: call to `%pT' lacks nop, can't restore toc; "
14284 "recompile with -fPIC\n"),
14285 input_bfd, input_section, rel->r_offset, sym_name);
14286 else
14287 info->callbacks->einfo
14288 /* xgettext:c-format */
14289 (_("%H: call to `%pT' lacks nop, can't restore toc; "
14290 "(-mcmodel=small toc adjust stub)\n"),
14291 input_bfd, input_section, rel->r_offset, sym_name);
14292
14293 bfd_set_error (bfd_error_bad_value);
14294 ret = FALSE;
14295 }
14296
14297 if (can_plt_call
14298 && (stub_entry->stub_type == ppc_stub_plt_call
14299 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14300 unresolved_reloc = FALSE;
14301 }
14302
14303 if ((stub_entry == NULL
14304 || stub_entry->stub_type == ppc_stub_long_branch
14305 || stub_entry->stub_type == ppc_stub_plt_branch)
14306 && get_opd_info (sec) != NULL)
14307 {
14308 /* The branch destination is the value of the opd entry. */
14309 bfd_vma off = (relocation + addend
14310 - sec->output_section->vma
14311 - sec->output_offset);
14312 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14313 if (dest != (bfd_vma) -1)
14314 {
14315 relocation = dest;
14316 addend = 0;
14317 reloc_dest = DEST_OPD;
14318 }
14319 }
14320
14321 /* If the branch is out of reach we ought to have a long
14322 branch stub. */
14323 from = (rel->r_offset
14324 + input_section->output_offset
14325 + input_section->output_section->vma);
14326
14327 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14328 ? fdh->elf.other
14329 : sym->st_other);
14330
14331 if (stub_entry != NULL
14332 && (stub_entry->stub_type == ppc_stub_long_branch
14333 || stub_entry->stub_type == ppc_stub_plt_branch)
14334 && (r_type == R_PPC64_ADDR14_BRTAKEN
14335 || r_type == R_PPC64_ADDR14_BRNTAKEN
14336 || (relocation + addend - from + max_br_offset
14337 < 2 * max_br_offset)))
14338 /* Don't use the stub if this branch is in range. */
14339 stub_entry = NULL;
14340
14341 if (stub_entry != NULL)
14342 {
14343 /* Munge up the value and addend so that we call the stub
14344 rather than the procedure directly. */
14345 asection *stub_sec = stub_entry->group->stub_sec;
14346
14347 if (stub_entry->stub_type == ppc_stub_save_res)
14348 relocation += (stub_sec->output_offset
14349 + stub_sec->output_section->vma
14350 + stub_sec->size - htab->sfpr->size
14351 - htab->sfpr->output_offset
14352 - htab->sfpr->output_section->vma);
14353 else
14354 relocation = (stub_entry->stub_offset
14355 + stub_sec->output_offset
14356 + stub_sec->output_section->vma);
14357 addend = 0;
14358 reloc_dest = DEST_STUB;
14359
14360 if ((stub_entry->stub_type == ppc_stub_plt_call
14361 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14362 && (ALWAYS_EMIT_R2SAVE
14363 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14364 && rel + 1 < relend
14365 && rel[1].r_offset == rel->r_offset + 4
14366 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14367 relocation += 4;
14368 }
14369
14370 if (insn != 0)
14371 {
14372 if (is_isa_v2)
14373 {
14374 /* Set 'a' bit. This is 0b00010 in BO field for branch
14375 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14376 for branch on CTR insns (BO == 1a00t or 1a01t). */
14377 if ((insn & (0x14 << 21)) == (0x04 << 21))
14378 insn |= 0x02 << 21;
14379 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14380 insn |= 0x08 << 21;
14381 else
14382 break;
14383 }
14384 else
14385 {
14386 /* Invert 'y' bit if not the default. */
14387 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14388 insn ^= 0x01 << 21;
14389 }
14390
14391 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14392 }
14393
14394 /* NOP out calls to undefined weak functions.
14395 We can thus call a weak function without first
14396 checking whether the function is defined. */
14397 else if (h != NULL
14398 && h->elf.root.type == bfd_link_hash_undefweak
14399 && h->elf.dynindx == -1
14400 && r_type == R_PPC64_REL24
14401 && relocation == 0
14402 && addend == 0)
14403 {
14404 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14405 goto copy_reloc;
14406 }
14407 break;
14408 }
14409
14410 /* Set `addend'. */
14411 tls_type = 0;
14412 switch (r_type)
14413 {
14414 default:
14415 /* xgettext:c-format */
14416 _bfd_error_handler (_("%pB: %s unsupported"),
14417 input_bfd, ppc64_elf_howto_table[r_type]->name);
14418
14419 bfd_set_error (bfd_error_bad_value);
14420 ret = FALSE;
14421 goto copy_reloc;
14422
14423 case R_PPC64_NONE:
14424 case R_PPC64_TLS:
14425 case R_PPC64_TLSGD:
14426 case R_PPC64_TLSLD:
14427 case R_PPC64_TOCSAVE:
14428 case R_PPC64_GNU_VTINHERIT:
14429 case R_PPC64_GNU_VTENTRY:
14430 case R_PPC64_ENTRY:
14431 goto copy_reloc;
14432
14433 /* GOT16 relocations. Like an ADDR16 using the symbol's
14434 address in the GOT as relocation value instead of the
14435 symbol's value itself. Also, create a GOT entry for the
14436 symbol and put the symbol value there. */
14437 case R_PPC64_GOT_TLSGD16:
14438 case R_PPC64_GOT_TLSGD16_LO:
14439 case R_PPC64_GOT_TLSGD16_HI:
14440 case R_PPC64_GOT_TLSGD16_HA:
14441 tls_type = TLS_TLS | TLS_GD;
14442 goto dogot;
14443
14444 case R_PPC64_GOT_TLSLD16:
14445 case R_PPC64_GOT_TLSLD16_LO:
14446 case R_PPC64_GOT_TLSLD16_HI:
14447 case R_PPC64_GOT_TLSLD16_HA:
14448 tls_type = TLS_TLS | TLS_LD;
14449 goto dogot;
14450
14451 case R_PPC64_GOT_TPREL16_DS:
14452 case R_PPC64_GOT_TPREL16_LO_DS:
14453 case R_PPC64_GOT_TPREL16_HI:
14454 case R_PPC64_GOT_TPREL16_HA:
14455 tls_type = TLS_TLS | TLS_TPREL;
14456 goto dogot;
14457
14458 case R_PPC64_GOT_DTPREL16_DS:
14459 case R_PPC64_GOT_DTPREL16_LO_DS:
14460 case R_PPC64_GOT_DTPREL16_HI:
14461 case R_PPC64_GOT_DTPREL16_HA:
14462 tls_type = TLS_TLS | TLS_DTPREL;
14463 goto dogot;
14464
14465 case R_PPC64_GOT16:
14466 case R_PPC64_GOT16_LO:
14467 case R_PPC64_GOT16_HI:
14468 case R_PPC64_GOT16_HA:
14469 case R_PPC64_GOT16_DS:
14470 case R_PPC64_GOT16_LO_DS:
14471 dogot:
14472 {
14473 /* Relocation is to the entry for this symbol in the global
14474 offset table. */
14475 asection *got;
14476 bfd_vma *offp;
14477 bfd_vma off;
14478 unsigned long indx = 0;
14479 struct got_entry *ent;
14480
14481 if (tls_type == (TLS_TLS | TLS_LD)
14482 && (h == NULL
14483 || !h->elf.def_dynamic))
14484 ent = ppc64_tlsld_got (input_bfd);
14485 else
14486 {
14487 if (h != NULL)
14488 {
14489 if (!htab->elf.dynamic_sections_created
14490 || h->elf.dynindx == -1
14491 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14492 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14493 /* This is actually a static link, or it is a
14494 -Bsymbolic link and the symbol is defined
14495 locally, or the symbol was forced to be local
14496 because of a version file. */
14497 ;
14498 else
14499 {
14500 indx = h->elf.dynindx;
14501 unresolved_reloc = FALSE;
14502 }
14503 ent = h->elf.got.glist;
14504 }
14505 else
14506 {
14507 if (local_got_ents == NULL)
14508 abort ();
14509 ent = local_got_ents[r_symndx];
14510 }
14511
14512 for (; ent != NULL; ent = ent->next)
14513 if (ent->addend == orig_rel.r_addend
14514 && ent->owner == input_bfd
14515 && ent->tls_type == tls_type)
14516 break;
14517 }
14518
14519 if (ent == NULL)
14520 abort ();
14521 if (ent->is_indirect)
14522 ent = ent->got.ent;
14523 offp = &ent->got.offset;
14524 got = ppc64_elf_tdata (ent->owner)->got;
14525 if (got == NULL)
14526 abort ();
14527
14528 /* The offset must always be a multiple of 8. We use the
14529 least significant bit to record whether we have already
14530 processed this entry. */
14531 off = *offp;
14532 if ((off & 1) != 0)
14533 off &= ~1;
14534 else
14535 {
14536 /* Generate relocs for the dynamic linker, except in
14537 the case of TLSLD where we'll use one entry per
14538 module. */
14539 asection *relgot;
14540 bfd_boolean ifunc;
14541
14542 *offp = off | 1;
14543 relgot = NULL;
14544 ifunc = (h != NULL
14545 ? h->elf.type == STT_GNU_IFUNC
14546 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14547 if (ifunc)
14548 {
14549 relgot = htab->elf.irelplt;
14550 if (indx == 0)
14551 htab->local_ifunc_resolver = 1;
14552 else if (is_static_defined (&h->elf))
14553 htab->maybe_local_ifunc_resolver = 1;
14554 }
14555 else if (indx != 0
14556 || (bfd_link_pic (info)
14557 && (h == NULL
14558 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14559 || (tls_type == (TLS_TLS | TLS_LD)
14560 && !h->elf.def_dynamic))
14561 && !(tls_type == (TLS_TLS | TLS_TPREL)
14562 && bfd_link_executable (info)
14563 && SYMBOL_REFERENCES_LOCAL (info, &h->elf))))
14564 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14565 if (relgot != NULL)
14566 {
14567 outrel.r_offset = (got->output_section->vma
14568 + got->output_offset
14569 + off);
14570 outrel.r_addend = addend;
14571 if (tls_type & (TLS_LD | TLS_GD))
14572 {
14573 outrel.r_addend = 0;
14574 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14575 if (tls_type == (TLS_TLS | TLS_GD))
14576 {
14577 loc = relgot->contents;
14578 loc += (relgot->reloc_count++
14579 * sizeof (Elf64_External_Rela));
14580 bfd_elf64_swap_reloca_out (output_bfd,
14581 &outrel, loc);
14582 outrel.r_offset += 8;
14583 outrel.r_addend = addend;
14584 outrel.r_info
14585 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14586 }
14587 }
14588 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14589 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14590 else if (tls_type == (TLS_TLS | TLS_TPREL))
14591 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14592 else if (indx != 0)
14593 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14594 else
14595 {
14596 if (ifunc)
14597 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14598 else
14599 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14600
14601 /* Write the .got section contents for the sake
14602 of prelink. */
14603 loc = got->contents + off;
14604 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14605 loc);
14606 }
14607
14608 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14609 {
14610 outrel.r_addend += relocation;
14611 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14612 {
14613 if (htab->elf.tls_sec == NULL)
14614 outrel.r_addend = 0;
14615 else
14616 outrel.r_addend -= htab->elf.tls_sec->vma;
14617 }
14618 }
14619 loc = relgot->contents;
14620 loc += (relgot->reloc_count++
14621 * sizeof (Elf64_External_Rela));
14622 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14623 }
14624
14625 /* Init the .got section contents here if we're not
14626 emitting a reloc. */
14627 else
14628 {
14629 relocation += addend;
14630 if (tls_type != 0)
14631 {
14632 if (htab->elf.tls_sec == NULL)
14633 relocation = 0;
14634 else
14635 {
14636 if (tls_type & TLS_LD)
14637 relocation = 0;
14638 else
14639 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14640 if (tls_type & TLS_TPREL)
14641 relocation += DTP_OFFSET - TP_OFFSET;
14642 }
14643
14644 if (tls_type & (TLS_GD | TLS_LD))
14645 {
14646 bfd_put_64 (output_bfd, relocation,
14647 got->contents + off + 8);
14648 relocation = 1;
14649 }
14650 }
14651 bfd_put_64 (output_bfd, relocation,
14652 got->contents + off);
14653 }
14654 }
14655
14656 if (off >= (bfd_vma) -2)
14657 abort ();
14658
14659 relocation = got->output_section->vma + got->output_offset + off;
14660 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14661 }
14662 break;
14663
14664 case R_PPC64_PLT16_HA:
14665 case R_PPC64_PLT16_HI:
14666 case R_PPC64_PLT16_LO:
14667 case R_PPC64_PLT32:
14668 case R_PPC64_PLT64:
14669 /* Relocation is to the entry for this symbol in the
14670 procedure linkage table. */
14671 {
14672 struct plt_entry **plt_list = NULL;
14673 if (h != NULL)
14674 plt_list = &h->elf.plt.plist;
14675 else if (local_got_ents != NULL)
14676 {
14677 struct plt_entry **local_plt = (struct plt_entry **)
14678 (local_got_ents + symtab_hdr->sh_info);
14679 unsigned char *local_got_tls_masks = (unsigned char *)
14680 (local_plt + symtab_hdr->sh_info);
14681 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14682 plt_list = local_plt + r_symndx;
14683 }
14684 if (plt_list)
14685 {
14686 struct plt_entry *ent;
14687
14688 for (ent = *plt_list; ent != NULL; ent = ent->next)
14689 if (ent->plt.offset != (bfd_vma) -1
14690 && ent->addend == orig_rel.r_addend)
14691 {
14692 asection *plt;
14693
14694 plt = htab->elf.splt;
14695 if (!htab->elf.dynamic_sections_created
14696 || h == NULL
14697 || h->elf.dynindx == -1)
14698 plt = htab->elf.iplt;
14699 relocation = (plt->output_section->vma
14700 + plt->output_offset
14701 + ent->plt.offset);
14702 addend = 0;
14703 unresolved_reloc = FALSE;
14704 break;
14705 }
14706 }
14707 }
14708 break;
14709
14710 case R_PPC64_TOC:
14711 /* Relocation value is TOC base. */
14712 relocation = TOCstart;
14713 if (r_symndx == STN_UNDEF)
14714 relocation += htab->sec_info[input_section->id].toc_off;
14715 else if (unresolved_reloc)
14716 ;
14717 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14718 relocation += htab->sec_info[sec->id].toc_off;
14719 else
14720 unresolved_reloc = TRUE;
14721 goto dodyn;
14722
14723 /* TOC16 relocs. We want the offset relative to the TOC base,
14724 which is the address of the start of the TOC plus 0x8000.
14725 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14726 in this order. */
14727 case R_PPC64_TOC16:
14728 case R_PPC64_TOC16_LO:
14729 case R_PPC64_TOC16_HI:
14730 case R_PPC64_TOC16_DS:
14731 case R_PPC64_TOC16_LO_DS:
14732 case R_PPC64_TOC16_HA:
14733 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14734 break;
14735
14736 /* Relocate against the beginning of the section. */
14737 case R_PPC64_SECTOFF:
14738 case R_PPC64_SECTOFF_LO:
14739 case R_PPC64_SECTOFF_HI:
14740 case R_PPC64_SECTOFF_DS:
14741 case R_PPC64_SECTOFF_LO_DS:
14742 case R_PPC64_SECTOFF_HA:
14743 if (sec != NULL)
14744 addend -= sec->output_section->vma;
14745 break;
14746
14747 case R_PPC64_REL16:
14748 case R_PPC64_REL16_LO:
14749 case R_PPC64_REL16_HI:
14750 case R_PPC64_REL16_HA:
14751 case R_PPC64_REL16DX_HA:
14752 break;
14753
14754 case R_PPC64_REL14:
14755 case R_PPC64_REL14_BRNTAKEN:
14756 case R_PPC64_REL14_BRTAKEN:
14757 case R_PPC64_REL24:
14758 break;
14759
14760 case R_PPC64_TPREL16:
14761 case R_PPC64_TPREL16_LO:
14762 case R_PPC64_TPREL16_HI:
14763 case R_PPC64_TPREL16_HA:
14764 case R_PPC64_TPREL16_DS:
14765 case R_PPC64_TPREL16_LO_DS:
14766 case R_PPC64_TPREL16_HIGH:
14767 case R_PPC64_TPREL16_HIGHA:
14768 case R_PPC64_TPREL16_HIGHER:
14769 case R_PPC64_TPREL16_HIGHERA:
14770 case R_PPC64_TPREL16_HIGHEST:
14771 case R_PPC64_TPREL16_HIGHESTA:
14772 if (h != NULL
14773 && h->elf.root.type == bfd_link_hash_undefweak
14774 && h->elf.dynindx == -1)
14775 {
14776 /* Make this relocation against an undefined weak symbol
14777 resolve to zero. This is really just a tweak, since
14778 code using weak externs ought to check that they are
14779 defined before using them. */
14780 bfd_byte *p = contents + rel->r_offset - d_offset;
14781
14782 insn = bfd_get_32 (input_bfd, p);
14783 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14784 if (insn != 0)
14785 bfd_put_32 (input_bfd, insn, p);
14786 break;
14787 }
14788 if (htab->elf.tls_sec != NULL)
14789 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14790 /* The TPREL16 relocs shouldn't really be used in shared
14791 libs or with non-local symbols as that will result in
14792 DT_TEXTREL being set, but support them anyway. */
14793 goto dodyn;
14794
14795 case R_PPC64_DTPREL16:
14796 case R_PPC64_DTPREL16_LO:
14797 case R_PPC64_DTPREL16_HI:
14798 case R_PPC64_DTPREL16_HA:
14799 case R_PPC64_DTPREL16_DS:
14800 case R_PPC64_DTPREL16_LO_DS:
14801 case R_PPC64_DTPREL16_HIGH:
14802 case R_PPC64_DTPREL16_HIGHA:
14803 case R_PPC64_DTPREL16_HIGHER:
14804 case R_PPC64_DTPREL16_HIGHERA:
14805 case R_PPC64_DTPREL16_HIGHEST:
14806 case R_PPC64_DTPREL16_HIGHESTA:
14807 if (htab->elf.tls_sec != NULL)
14808 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14809 break;
14810
14811 case R_PPC64_ADDR64_LOCAL:
14812 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14813 ? h->elf.other
14814 : sym->st_other);
14815 break;
14816
14817 case R_PPC64_DTPMOD64:
14818 relocation = 1;
14819 addend = 0;
14820 goto dodyn;
14821
14822 case R_PPC64_TPREL64:
14823 if (htab->elf.tls_sec != NULL)
14824 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14825 goto dodyn;
14826
14827 case R_PPC64_DTPREL64:
14828 if (htab->elf.tls_sec != NULL)
14829 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14830 /* Fall through. */
14831
14832 /* Relocations that may need to be propagated if this is a
14833 dynamic object. */
14834 case R_PPC64_REL30:
14835 case R_PPC64_REL32:
14836 case R_PPC64_REL64:
14837 case R_PPC64_ADDR14:
14838 case R_PPC64_ADDR14_BRNTAKEN:
14839 case R_PPC64_ADDR14_BRTAKEN:
14840 case R_PPC64_ADDR16:
14841 case R_PPC64_ADDR16_DS:
14842 case R_PPC64_ADDR16_HA:
14843 case R_PPC64_ADDR16_HI:
14844 case R_PPC64_ADDR16_HIGH:
14845 case R_PPC64_ADDR16_HIGHA:
14846 case R_PPC64_ADDR16_HIGHER:
14847 case R_PPC64_ADDR16_HIGHERA:
14848 case R_PPC64_ADDR16_HIGHEST:
14849 case R_PPC64_ADDR16_HIGHESTA:
14850 case R_PPC64_ADDR16_LO:
14851 case R_PPC64_ADDR16_LO_DS:
14852 case R_PPC64_ADDR24:
14853 case R_PPC64_ADDR32:
14854 case R_PPC64_ADDR64:
14855 case R_PPC64_UADDR16:
14856 case R_PPC64_UADDR32:
14857 case R_PPC64_UADDR64:
14858 dodyn:
14859 if ((input_section->flags & SEC_ALLOC) == 0)
14860 break;
14861
14862 if (NO_OPD_RELOCS && is_opd)
14863 break;
14864
14865 if (bfd_link_pic (info)
14866 ? ((h == NULL
14867 || h->dyn_relocs != NULL)
14868 && ((h != NULL && pc_dynrelocs (h))
14869 || must_be_dyn_reloc (info, r_type)))
14870 : (h != NULL
14871 ? h->dyn_relocs != NULL
14872 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14873 {
14874 bfd_boolean skip, relocate;
14875 asection *sreloc;
14876 bfd_vma out_off;
14877 long indx = 0;
14878
14879 /* When generating a dynamic object, these relocations
14880 are copied into the output file to be resolved at run
14881 time. */
14882
14883 skip = FALSE;
14884 relocate = FALSE;
14885
14886 out_off = _bfd_elf_section_offset (output_bfd, info,
14887 input_section, rel->r_offset);
14888 if (out_off == (bfd_vma) -1)
14889 skip = TRUE;
14890 else if (out_off == (bfd_vma) -2)
14891 skip = TRUE, relocate = TRUE;
14892 out_off += (input_section->output_section->vma
14893 + input_section->output_offset);
14894 outrel.r_offset = out_off;
14895 outrel.r_addend = rel->r_addend;
14896
14897 /* Optimize unaligned reloc use. */
14898 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14899 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14900 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14901 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14902 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14903 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14904 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14905 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14906 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14907
14908 if (skip)
14909 memset (&outrel, 0, sizeof outrel);
14910 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14911 && !is_opd
14912 && r_type != R_PPC64_TOC)
14913 {
14914 indx = h->elf.dynindx;
14915 BFD_ASSERT (indx != -1);
14916 outrel.r_info = ELF64_R_INFO (indx, r_type);
14917 }
14918 else
14919 {
14920 /* This symbol is local, or marked to become local,
14921 or this is an opd section reloc which must point
14922 at a local function. */
14923 outrel.r_addend += relocation;
14924 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14925 {
14926 if (is_opd && h != NULL)
14927 {
14928 /* Lie about opd entries. This case occurs
14929 when building shared libraries and we
14930 reference a function in another shared
14931 lib. The same thing happens for a weak
14932 definition in an application that's
14933 overridden by a strong definition in a
14934 shared lib. (I believe this is a generic
14935 bug in binutils handling of weak syms.)
14936 In these cases we won't use the opd
14937 entry in this lib. */
14938 unresolved_reloc = FALSE;
14939 }
14940 if (!is_opd
14941 && r_type == R_PPC64_ADDR64
14942 && (h != NULL
14943 ? h->elf.type == STT_GNU_IFUNC
14944 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14945 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14946 else
14947 {
14948 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14949
14950 /* We need to relocate .opd contents for ld.so.
14951 Prelink also wants simple and consistent rules
14952 for relocs. This make all RELATIVE relocs have
14953 *r_offset equal to r_addend. */
14954 relocate = TRUE;
14955 }
14956 }
14957 else
14958 {
14959 if (h != NULL
14960 ? h->elf.type == STT_GNU_IFUNC
14961 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14962 {
14963 info->callbacks->einfo
14964 /* xgettext:c-format */
14965 (_("%H: %s for indirect "
14966 "function `%pT' unsupported\n"),
14967 input_bfd, input_section, rel->r_offset,
14968 ppc64_elf_howto_table[r_type]->name,
14969 sym_name);
14970 ret = FALSE;
14971 }
14972 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14973 ;
14974 else if (sec == NULL || sec->owner == NULL)
14975 {
14976 bfd_set_error (bfd_error_bad_value);
14977 return FALSE;
14978 }
14979 else
14980 {
14981 asection *osec;
14982
14983 osec = sec->output_section;
14984 indx = elf_section_data (osec)->dynindx;
14985
14986 if (indx == 0)
14987 {
14988 if ((osec->flags & SEC_READONLY) == 0
14989 && htab->elf.data_index_section != NULL)
14990 osec = htab->elf.data_index_section;
14991 else
14992 osec = htab->elf.text_index_section;
14993 indx = elf_section_data (osec)->dynindx;
14994 }
14995 BFD_ASSERT (indx != 0);
14996
14997 /* We are turning this relocation into one
14998 against a section symbol, so subtract out
14999 the output section's address but not the
15000 offset of the input section in the output
15001 section. */
15002 outrel.r_addend -= osec->vma;
15003 }
15004
15005 outrel.r_info = ELF64_R_INFO (indx, r_type);
15006 }
15007 }
15008
15009 sreloc = elf_section_data (input_section)->sreloc;
15010 if (h != NULL
15011 ? h->elf.type == STT_GNU_IFUNC
15012 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15013 {
15014 sreloc = htab->elf.irelplt;
15015 if (indx == 0)
15016 htab->local_ifunc_resolver = 1;
15017 else if (is_static_defined (&h->elf))
15018 htab->maybe_local_ifunc_resolver = 1;
15019 }
15020 if (sreloc == NULL)
15021 abort ();
15022
15023 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15024 >= sreloc->size)
15025 abort ();
15026 loc = sreloc->contents;
15027 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15028 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15029
15030 /* If this reloc is against an external symbol, it will
15031 be computed at runtime, so there's no need to do
15032 anything now. However, for the sake of prelink ensure
15033 that the section contents are a known value. */
15034 if (! relocate)
15035 {
15036 unresolved_reloc = FALSE;
15037 /* The value chosen here is quite arbitrary as ld.so
15038 ignores section contents except for the special
15039 case of .opd where the contents might be accessed
15040 before relocation. Choose zero, as that won't
15041 cause reloc overflow. */
15042 relocation = 0;
15043 addend = 0;
15044 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15045 to improve backward compatibility with older
15046 versions of ld. */
15047 if (r_type == R_PPC64_ADDR64)
15048 addend = outrel.r_addend;
15049 /* Adjust pc_relative relocs to have zero in *r_offset. */
15050 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15051 addend = outrel.r_offset;
15052 }
15053 }
15054 break;
15055
15056 case R_PPC64_COPY:
15057 case R_PPC64_GLOB_DAT:
15058 case R_PPC64_JMP_SLOT:
15059 case R_PPC64_JMP_IREL:
15060 case R_PPC64_RELATIVE:
15061 /* We shouldn't ever see these dynamic relocs in relocatable
15062 files. */
15063 /* Fall through. */
15064
15065 case R_PPC64_PLTGOT16:
15066 case R_PPC64_PLTGOT16_DS:
15067 case R_PPC64_PLTGOT16_HA:
15068 case R_PPC64_PLTGOT16_HI:
15069 case R_PPC64_PLTGOT16_LO:
15070 case R_PPC64_PLTGOT16_LO_DS:
15071 case R_PPC64_PLTREL32:
15072 case R_PPC64_PLTREL64:
15073 /* These ones haven't been implemented yet. */
15074
15075 info->callbacks->einfo
15076 /* xgettext:c-format */
15077 (_("%P: %pB: %s is not supported for `%pT'\n"),
15078 input_bfd,
15079 ppc64_elf_howto_table[r_type]->name, sym_name);
15080
15081 bfd_set_error (bfd_error_invalid_operation);
15082 ret = FALSE;
15083 goto copy_reloc;
15084 }
15085
15086 /* Multi-instruction sequences that access the TOC can be
15087 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15088 to nop; addi rb,r2,x; */
15089 switch (r_type)
15090 {
15091 default:
15092 break;
15093
15094 case R_PPC64_GOT_TLSLD16_HI:
15095 case R_PPC64_GOT_TLSGD16_HI:
15096 case R_PPC64_GOT_TPREL16_HI:
15097 case R_PPC64_GOT_DTPREL16_HI:
15098 case R_PPC64_GOT16_HI:
15099 case R_PPC64_TOC16_HI:
15100 /* These relocs would only be useful if building up an
15101 offset to later add to r2, perhaps in an indexed
15102 addressing mode instruction. Don't try to optimize.
15103 Unfortunately, the possibility of someone building up an
15104 offset like this or even with the HA relocs, means that
15105 we need to check the high insn when optimizing the low
15106 insn. */
15107 break;
15108
15109 case R_PPC64_GOT_TLSLD16_HA:
15110 case R_PPC64_GOT_TLSGD16_HA:
15111 case R_PPC64_GOT_TPREL16_HA:
15112 case R_PPC64_GOT_DTPREL16_HA:
15113 case R_PPC64_GOT16_HA:
15114 case R_PPC64_TOC16_HA:
15115 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15116 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15117 {
15118 bfd_byte *p = contents + (rel->r_offset & ~3);
15119 bfd_put_32 (input_bfd, NOP, p);
15120 goto copy_reloc;
15121 }
15122 break;
15123
15124 case R_PPC64_GOT_TLSLD16_LO:
15125 case R_PPC64_GOT_TLSGD16_LO:
15126 case R_PPC64_GOT_TPREL16_LO_DS:
15127 case R_PPC64_GOT_DTPREL16_LO_DS:
15128 case R_PPC64_GOT16_LO:
15129 case R_PPC64_GOT16_LO_DS:
15130 case R_PPC64_TOC16_LO:
15131 case R_PPC64_TOC16_LO_DS:
15132 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15133 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15134 {
15135 bfd_byte *p = contents + (rel->r_offset & ~3);
15136 insn = bfd_get_32 (input_bfd, p);
15137 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15138 {
15139 /* Transform addic to addi when we change reg. */
15140 insn &= ~((0x3f << 26) | (0x1f << 16));
15141 insn |= (14u << 26) | (2 << 16);
15142 }
15143 else
15144 {
15145 insn &= ~(0x1f << 16);
15146 insn |= 2 << 16;
15147 }
15148 bfd_put_32 (input_bfd, insn, p);
15149 }
15150 break;
15151
15152 case R_PPC64_TPREL16_HA:
15153 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15154 {
15155 bfd_byte *p = contents + (rel->r_offset & ~3);
15156 insn = bfd_get_32 (input_bfd, p);
15157 if ((insn & ((0x3f << 26) | 0x1f << 16))
15158 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15159 /* xgettext:c-format */
15160 info->callbacks->minfo
15161 (_("%H: warning: %s unexpected insn %#x.\n"),
15162 input_bfd, input_section, rel->r_offset,
15163 ppc64_elf_howto_table[r_type]->name, insn);
15164 else
15165 {
15166 bfd_put_32 (input_bfd, NOP, p);
15167 goto copy_reloc;
15168 }
15169 }
15170 break;
15171
15172 case R_PPC64_TPREL16_LO:
15173 case R_PPC64_TPREL16_LO_DS:
15174 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15175 {
15176 bfd_byte *p = contents + (rel->r_offset & ~3);
15177 insn = bfd_get_32 (input_bfd, p);
15178 insn &= ~(0x1f << 16);
15179 insn |= 13 << 16;
15180 bfd_put_32 (input_bfd, insn, p);
15181 }
15182 break;
15183 }
15184
15185 /* Do any further special processing. */
15186 switch (r_type)
15187 {
15188 default:
15189 break;
15190
15191 case R_PPC64_REL16_HA:
15192 case R_PPC64_REL16DX_HA:
15193 case R_PPC64_ADDR16_HA:
15194 case R_PPC64_ADDR16_HIGHA:
15195 case R_PPC64_ADDR16_HIGHERA:
15196 case R_PPC64_ADDR16_HIGHESTA:
15197 case R_PPC64_TOC16_HA:
15198 case R_PPC64_SECTOFF_HA:
15199 case R_PPC64_TPREL16_HA:
15200 case R_PPC64_TPREL16_HIGHA:
15201 case R_PPC64_TPREL16_HIGHERA:
15202 case R_PPC64_TPREL16_HIGHESTA:
15203 case R_PPC64_DTPREL16_HA:
15204 case R_PPC64_DTPREL16_HIGHA:
15205 case R_PPC64_DTPREL16_HIGHERA:
15206 case R_PPC64_DTPREL16_HIGHESTA:
15207 /* It's just possible that this symbol is a weak symbol
15208 that's not actually defined anywhere. In that case,
15209 'sec' would be NULL, and we should leave the symbol
15210 alone (it will be set to zero elsewhere in the link). */
15211 if (sec == NULL)
15212 break;
15213 /* Fall through. */
15214
15215 case R_PPC64_GOT16_HA:
15216 case R_PPC64_PLTGOT16_HA:
15217 case R_PPC64_PLT16_HA:
15218 case R_PPC64_GOT_TLSGD16_HA:
15219 case R_PPC64_GOT_TLSLD16_HA:
15220 case R_PPC64_GOT_TPREL16_HA:
15221 case R_PPC64_GOT_DTPREL16_HA:
15222 /* Add 0x10000 if sign bit in 0:15 is set.
15223 Bits 0:15 are not used. */
15224 addend += 0x8000;
15225 break;
15226
15227 case R_PPC64_ADDR16_DS:
15228 case R_PPC64_ADDR16_LO_DS:
15229 case R_PPC64_GOT16_DS:
15230 case R_PPC64_GOT16_LO_DS:
15231 case R_PPC64_PLT16_LO_DS:
15232 case R_PPC64_SECTOFF_DS:
15233 case R_PPC64_SECTOFF_LO_DS:
15234 case R_PPC64_TOC16_DS:
15235 case R_PPC64_TOC16_LO_DS:
15236 case R_PPC64_PLTGOT16_DS:
15237 case R_PPC64_PLTGOT16_LO_DS:
15238 case R_PPC64_GOT_TPREL16_DS:
15239 case R_PPC64_GOT_TPREL16_LO_DS:
15240 case R_PPC64_GOT_DTPREL16_DS:
15241 case R_PPC64_GOT_DTPREL16_LO_DS:
15242 case R_PPC64_TPREL16_DS:
15243 case R_PPC64_TPREL16_LO_DS:
15244 case R_PPC64_DTPREL16_DS:
15245 case R_PPC64_DTPREL16_LO_DS:
15246 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15247 mask = 3;
15248 /* If this reloc is against an lq, lxv, or stxv insn, then
15249 the value must be a multiple of 16. This is somewhat of
15250 a hack, but the "correct" way to do this by defining _DQ
15251 forms of all the _DS relocs bloats all reloc switches in
15252 this file. It doesn't make much sense to use these
15253 relocs in data, so testing the insn should be safe. */
15254 if ((insn & (0x3f << 26)) == (56u << 26)
15255 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15256 mask = 15;
15257 relocation += addend;
15258 addend = insn & (mask ^ 3);
15259 if ((relocation & mask) != 0)
15260 {
15261 relocation ^= relocation & mask;
15262 info->callbacks->einfo
15263 /* xgettext:c-format */
15264 (_("%H: error: %s not a multiple of %u\n"),
15265 input_bfd, input_section, rel->r_offset,
15266 ppc64_elf_howto_table[r_type]->name,
15267 mask + 1);
15268 bfd_set_error (bfd_error_bad_value);
15269 ret = FALSE;
15270 goto copy_reloc;
15271 }
15272 break;
15273 }
15274
15275 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15276 because such sections are not SEC_ALLOC and thus ld.so will
15277 not process them. */
15278 howto = ppc64_elf_howto_table[(int) r_type];
15279 if (unresolved_reloc
15280 && !((input_section->flags & SEC_DEBUGGING) != 0
15281 && h->elf.def_dynamic)
15282 && _bfd_elf_section_offset (output_bfd, info, input_section,
15283 rel->r_offset) != (bfd_vma) -1)
15284 {
15285 info->callbacks->einfo
15286 /* xgettext:c-format */
15287 (_("%H: unresolvable %s against `%pT'\n"),
15288 input_bfd, input_section, rel->r_offset,
15289 howto->name,
15290 h->elf.root.root.string);
15291 ret = FALSE;
15292 }
15293
15294 /* 16-bit fields in insns mostly have signed values, but a
15295 few insns have 16-bit unsigned values. Really, we should
15296 have different reloc types. */
15297 if (howto->complain_on_overflow != complain_overflow_dont
15298 && howto->dst_mask == 0xffff
15299 && (input_section->flags & SEC_CODE) != 0)
15300 {
15301 enum complain_overflow complain = complain_overflow_signed;
15302
15303 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15304 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15305 complain = complain_overflow_bitfield;
15306 else if (howto->rightshift == 0
15307 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15308 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15309 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15310 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15311 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15312 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15313 complain = complain_overflow_unsigned;
15314 if (howto->complain_on_overflow != complain)
15315 {
15316 alt_howto = *howto;
15317 alt_howto.complain_on_overflow = complain;
15318 howto = &alt_howto;
15319 }
15320 }
15321
15322 if (r_type == R_PPC64_REL16DX_HA)
15323 {
15324 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15325 if (rel->r_offset + 4 > input_section->size)
15326 r = bfd_reloc_outofrange;
15327 else
15328 {
15329 relocation += addend;
15330 relocation -= (rel->r_offset
15331 + input_section->output_offset
15332 + input_section->output_section->vma);
15333 relocation = (bfd_signed_vma) relocation >> 16;
15334 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15335 insn &= ~0x1fffc1;
15336 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15337 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15338 r = bfd_reloc_ok;
15339 if (relocation + 0x8000 > 0xffff)
15340 r = bfd_reloc_overflow;
15341 }
15342 }
15343 else
15344 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15345 rel->r_offset, relocation, addend);
15346
15347 if (r != bfd_reloc_ok)
15348 {
15349 char *more_info = NULL;
15350 const char *reloc_name = howto->name;
15351
15352 if (reloc_dest != DEST_NORMAL)
15353 {
15354 more_info = bfd_malloc (strlen (reloc_name) + 8);
15355 if (more_info != NULL)
15356 {
15357 strcpy (more_info, reloc_name);
15358 strcat (more_info, (reloc_dest == DEST_OPD
15359 ? " (OPD)" : " (stub)"));
15360 reloc_name = more_info;
15361 }
15362 }
15363
15364 if (r == bfd_reloc_overflow)
15365 {
15366 /* On code like "if (foo) foo();" don't report overflow
15367 on a branch to zero when foo is undefined. */
15368 if (!warned
15369 && (reloc_dest == DEST_STUB
15370 || !(h != NULL
15371 && (h->elf.root.type == bfd_link_hash_undefweak
15372 || h->elf.root.type == bfd_link_hash_undefined)
15373 && is_branch_reloc (r_type))))
15374 info->callbacks->reloc_overflow (info, &h->elf.root,
15375 sym_name, reloc_name,
15376 orig_rel.r_addend,
15377 input_bfd, input_section,
15378 rel->r_offset);
15379 }
15380 else
15381 {
15382 info->callbacks->einfo
15383 /* xgettext:c-format */
15384 (_("%H: %s against `%pT': error %d\n"),
15385 input_bfd, input_section, rel->r_offset,
15386 reloc_name, sym_name, (int) r);
15387 ret = FALSE;
15388 }
15389 if (more_info != NULL)
15390 free (more_info);
15391 }
15392 copy_reloc:
15393 if (wrel != rel)
15394 *wrel = *rel;
15395 }
15396
15397 if (wrel != rel)
15398 {
15399 Elf_Internal_Shdr *rel_hdr;
15400 size_t deleted = rel - wrel;
15401
15402 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15403 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15404 if (rel_hdr->sh_size == 0)
15405 {
15406 /* It is too late to remove an empty reloc section. Leave
15407 one NONE reloc.
15408 ??? What is wrong with an empty section??? */
15409 rel_hdr->sh_size = rel_hdr->sh_entsize;
15410 deleted -= 1;
15411 }
15412 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15413 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15414 input_section->reloc_count -= deleted;
15415 }
15416
15417 /* If we're emitting relocations, then shortly after this function
15418 returns, reloc offsets and addends for this section will be
15419 adjusted. Worse, reloc symbol indices will be for the output
15420 file rather than the input. Save a copy of the relocs for
15421 opd_entry_value. */
15422 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15423 {
15424 bfd_size_type amt;
15425 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15426 rel = bfd_alloc (input_bfd, amt);
15427 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15428 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15429 if (rel == NULL)
15430 return FALSE;
15431 memcpy (rel, relocs, amt);
15432 }
15433 return ret;
15434 }
15435
15436 /* Adjust the value of any local symbols in opd sections. */
15437
15438 static int
15439 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15440 const char *name ATTRIBUTE_UNUSED,
15441 Elf_Internal_Sym *elfsym,
15442 asection *input_sec,
15443 struct elf_link_hash_entry *h)
15444 {
15445 struct _opd_sec_data *opd;
15446 long adjust;
15447 bfd_vma value;
15448
15449 if (h != NULL)
15450 return 1;
15451
15452 opd = get_opd_info (input_sec);
15453 if (opd == NULL || opd->adjust == NULL)
15454 return 1;
15455
15456 value = elfsym->st_value - input_sec->output_offset;
15457 if (!bfd_link_relocatable (info))
15458 value -= input_sec->output_section->vma;
15459
15460 adjust = opd->adjust[OPD_NDX (value)];
15461 if (adjust == -1)
15462 return 2;
15463
15464 elfsym->st_value += adjust;
15465 return 1;
15466 }
15467
15468 /* Finish up dynamic symbol handling. We set the contents of various
15469 dynamic sections here. */
15470
15471 static bfd_boolean
15472 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15473 struct bfd_link_info *info,
15474 struct elf_link_hash_entry *h,
15475 Elf_Internal_Sym *sym)
15476 {
15477 struct ppc_link_hash_table *htab;
15478 struct plt_entry *ent;
15479 Elf_Internal_Rela rela;
15480 bfd_byte *loc;
15481
15482 htab = ppc_hash_table (info);
15483 if (htab == NULL)
15484 return FALSE;
15485
15486 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15487 if (ent->plt.offset != (bfd_vma) -1)
15488 {
15489 /* This symbol has an entry in the procedure linkage
15490 table. Set it up. */
15491 if (!htab->elf.dynamic_sections_created
15492 || h->dynindx == -1)
15493 {
15494 BFD_ASSERT (h->type == STT_GNU_IFUNC
15495 && h->def_regular
15496 && (h->root.type == bfd_link_hash_defined
15497 || h->root.type == bfd_link_hash_defweak));
15498 rela.r_offset = (htab->elf.iplt->output_section->vma
15499 + htab->elf.iplt->output_offset
15500 + ent->plt.offset);
15501 if (htab->opd_abi)
15502 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15503 else
15504 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15505 rela.r_addend = (h->root.u.def.value
15506 + h->root.u.def.section->output_offset
15507 + h->root.u.def.section->output_section->vma
15508 + ent->addend);
15509 loc = (htab->elf.irelplt->contents
15510 + (htab->elf.irelplt->reloc_count++
15511 * sizeof (Elf64_External_Rela)));
15512 htab->local_ifunc_resolver = 1;
15513 }
15514 else
15515 {
15516 rela.r_offset = (htab->elf.splt->output_section->vma
15517 + htab->elf.splt->output_offset
15518 + ent->plt.offset);
15519 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15520 rela.r_addend = ent->addend;
15521 loc = (htab->elf.srelplt->contents
15522 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15523 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15524 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15525 htab->maybe_local_ifunc_resolver = 1;
15526 }
15527 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15528
15529 if (!htab->opd_abi)
15530 {
15531 if (!h->def_regular)
15532 {
15533 /* Mark the symbol as undefined, rather than as
15534 defined in glink. Leave the value if there were
15535 any relocations where pointer equality matters
15536 (this is a clue for the dynamic linker, to make
15537 function pointer comparisons work between an
15538 application and shared library), otherwise set it
15539 to zero. */
15540 sym->st_shndx = SHN_UNDEF;
15541 if (!h->pointer_equality_needed)
15542 sym->st_value = 0;
15543 else if (!h->ref_regular_nonweak)
15544 {
15545 /* This breaks function pointer comparisons, but
15546 that is better than breaking tests for a NULL
15547 function pointer. */
15548 sym->st_value = 0;
15549 }
15550 }
15551 }
15552 }
15553
15554 if (h->needs_copy)
15555 {
15556 /* This symbol needs a copy reloc. Set it up. */
15557 asection *srel;
15558
15559 if (h->dynindx == -1
15560 || (h->root.type != bfd_link_hash_defined
15561 && h->root.type != bfd_link_hash_defweak)
15562 || htab->elf.srelbss == NULL
15563 || htab->elf.sreldynrelro == NULL)
15564 abort ();
15565
15566 rela.r_offset = (h->root.u.def.value
15567 + h->root.u.def.section->output_section->vma
15568 + h->root.u.def.section->output_offset);
15569 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15570 rela.r_addend = 0;
15571 if (h->root.u.def.section == htab->elf.sdynrelro)
15572 srel = htab->elf.sreldynrelro;
15573 else
15574 srel = htab->elf.srelbss;
15575 loc = srel->contents;
15576 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15577 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15578 }
15579
15580 return TRUE;
15581 }
15582
15583 /* Used to decide how to sort relocs in an optimal manner for the
15584 dynamic linker, before writing them out. */
15585
15586 static enum elf_reloc_type_class
15587 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15588 const asection *rel_sec,
15589 const Elf_Internal_Rela *rela)
15590 {
15591 enum elf_ppc64_reloc_type r_type;
15592 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15593
15594 if (rel_sec == htab->elf.irelplt)
15595 return reloc_class_ifunc;
15596
15597 r_type = ELF64_R_TYPE (rela->r_info);
15598 switch (r_type)
15599 {
15600 case R_PPC64_RELATIVE:
15601 return reloc_class_relative;
15602 case R_PPC64_JMP_SLOT:
15603 return reloc_class_plt;
15604 case R_PPC64_COPY:
15605 return reloc_class_copy;
15606 default:
15607 return reloc_class_normal;
15608 }
15609 }
15610
15611 /* Finish up the dynamic sections. */
15612
15613 static bfd_boolean
15614 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15615 struct bfd_link_info *info)
15616 {
15617 struct ppc_link_hash_table *htab;
15618 bfd *dynobj;
15619 asection *sdyn;
15620
15621 htab = ppc_hash_table (info);
15622 if (htab == NULL)
15623 return FALSE;
15624
15625 dynobj = htab->elf.dynobj;
15626 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15627
15628 if (htab->elf.dynamic_sections_created)
15629 {
15630 Elf64_External_Dyn *dyncon, *dynconend;
15631
15632 if (sdyn == NULL || htab->elf.sgot == NULL)
15633 abort ();
15634
15635 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15636 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15637 for (; dyncon < dynconend; dyncon++)
15638 {
15639 Elf_Internal_Dyn dyn;
15640 asection *s;
15641
15642 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15643
15644 switch (dyn.d_tag)
15645 {
15646 default:
15647 continue;
15648
15649 case DT_PPC64_GLINK:
15650 s = htab->glink;
15651 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15652 /* We stupidly defined DT_PPC64_GLINK to be the start
15653 of glink rather than the first entry point, which is
15654 what ld.so needs, and now have a bigger stub to
15655 support automatic multiple TOCs. */
15656 dyn.d_un.d_ptr += GLINK_PLTRESOLVE_SIZE (htab) - 8 * 4;
15657 break;
15658
15659 case DT_PPC64_OPD:
15660 s = bfd_get_section_by_name (output_bfd, ".opd");
15661 if (s == NULL)
15662 continue;
15663 dyn.d_un.d_ptr = s->vma;
15664 break;
15665
15666 case DT_PPC64_OPT:
15667 if (htab->do_multi_toc && htab->multi_toc_needed)
15668 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15669 if (htab->has_plt_localentry0)
15670 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15671 break;
15672
15673 case DT_PPC64_OPDSZ:
15674 s = bfd_get_section_by_name (output_bfd, ".opd");
15675 if (s == NULL)
15676 continue;
15677 dyn.d_un.d_val = s->size;
15678 break;
15679
15680 case DT_PLTGOT:
15681 s = htab->elf.splt;
15682 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15683 break;
15684
15685 case DT_JMPREL:
15686 s = htab->elf.srelplt;
15687 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15688 break;
15689
15690 case DT_PLTRELSZ:
15691 dyn.d_un.d_val = htab->elf.srelplt->size;
15692 break;
15693
15694 case DT_TEXTREL:
15695 if (htab->local_ifunc_resolver)
15696 info->callbacks->einfo
15697 (_("%X%P: text relocations and GNU indirect "
15698 "functions will result in a segfault at runtime\n"));
15699 else if (htab->maybe_local_ifunc_resolver)
15700 info->callbacks->einfo
15701 (_("%P: warning: text relocations and GNU indirect "
15702 "functions may result in a segfault at runtime\n"));
15703 continue;
15704 }
15705
15706 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15707 }
15708 }
15709
15710 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15711 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15712 {
15713 /* Fill in the first entry in the global offset table.
15714 We use it to hold the link-time TOCbase. */
15715 bfd_put_64 (output_bfd,
15716 elf_gp (output_bfd) + TOC_BASE_OFF,
15717 htab->elf.sgot->contents);
15718
15719 /* Set .got entry size. */
15720 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15721 }
15722
15723 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15724 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15725 {
15726 /* Set .plt entry size. */
15727 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15728 = PLT_ENTRY_SIZE (htab);
15729 }
15730
15731 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15732 brlt ourselves if emitrelocations. */
15733 if (htab->brlt != NULL
15734 && htab->brlt->reloc_count != 0
15735 && !_bfd_elf_link_output_relocs (output_bfd,
15736 htab->brlt,
15737 elf_section_data (htab->brlt)->rela.hdr,
15738 elf_section_data (htab->brlt)->relocs,
15739 NULL))
15740 return FALSE;
15741
15742 if (htab->glink != NULL
15743 && htab->glink->reloc_count != 0
15744 && !_bfd_elf_link_output_relocs (output_bfd,
15745 htab->glink,
15746 elf_section_data (htab->glink)->rela.hdr,
15747 elf_section_data (htab->glink)->relocs,
15748 NULL))
15749 return FALSE;
15750
15751 if (htab->glink_eh_frame != NULL
15752 && htab->glink_eh_frame->size != 0)
15753 {
15754 bfd_vma val;
15755 bfd_byte *p;
15756 struct map_stub *group;
15757 size_t align = 4;
15758
15759 p = htab->glink_eh_frame->contents;
15760 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15761
15762 for (group = htab->group; group != NULL; group = group->next)
15763 if (group->stub_sec != NULL)
15764 {
15765 /* Offset to stub section. */
15766 val = (group->stub_sec->output_section->vma
15767 + group->stub_sec->output_offset);
15768 val -= (htab->glink_eh_frame->output_section->vma
15769 + htab->glink_eh_frame->output_offset
15770 + (p + 8 - htab->glink_eh_frame->contents));
15771 if (val + 0x80000000 > 0xffffffff)
15772 {
15773 _bfd_error_handler
15774 (_("%s offset too large for .eh_frame sdata4 encoding"),
15775 group->stub_sec->name);
15776 return FALSE;
15777 }
15778 bfd_put_32 (dynobj, val, p + 8);
15779 p += stub_eh_frame_size (group, align);
15780 }
15781 if (htab->glink != NULL && htab->glink->size != 0)
15782 {
15783 /* Offset to .glink. */
15784 val = (htab->glink->output_section->vma
15785 + htab->glink->output_offset
15786 + 8);
15787 val -= (htab->glink_eh_frame->output_section->vma
15788 + htab->glink_eh_frame->output_offset
15789 + (p + 8 - htab->glink_eh_frame->contents));
15790 if (val + 0x80000000 > 0xffffffff)
15791 {
15792 _bfd_error_handler
15793 (_("%s offset too large for .eh_frame sdata4 encoding"),
15794 htab->glink->name);
15795 return FALSE;
15796 }
15797 bfd_put_32 (dynobj, val, p + 8);
15798 p += (24 + align - 1) & -align;
15799 }
15800
15801 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15802 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15803 htab->glink_eh_frame,
15804 htab->glink_eh_frame->contents))
15805 return FALSE;
15806 }
15807
15808 /* We need to handle writing out multiple GOT sections ourselves,
15809 since we didn't add them to DYNOBJ. We know dynobj is the first
15810 bfd. */
15811 while ((dynobj = dynobj->link.next) != NULL)
15812 {
15813 asection *s;
15814
15815 if (!is_ppc64_elf (dynobj))
15816 continue;
15817
15818 s = ppc64_elf_tdata (dynobj)->got;
15819 if (s != NULL
15820 && s->size != 0
15821 && s->output_section != bfd_abs_section_ptr
15822 && !bfd_set_section_contents (output_bfd, s->output_section,
15823 s->contents, s->output_offset,
15824 s->size))
15825 return FALSE;
15826 s = ppc64_elf_tdata (dynobj)->relgot;
15827 if (s != NULL
15828 && s->size != 0
15829 && s->output_section != bfd_abs_section_ptr
15830 && !bfd_set_section_contents (output_bfd, s->output_section,
15831 s->contents, s->output_offset,
15832 s->size))
15833 return FALSE;
15834 }
15835
15836 return TRUE;
15837 }
15838
15839 #include "elf64-target.h"
15840
15841 /* FreeBSD support */
15842
15843 #undef TARGET_LITTLE_SYM
15844 #undef TARGET_LITTLE_NAME
15845
15846 #undef TARGET_BIG_SYM
15847 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15848 #undef TARGET_BIG_NAME
15849 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15850
15851 #undef ELF_OSABI
15852 #define ELF_OSABI ELFOSABI_FREEBSD
15853
15854 #undef elf64_bed
15855 #define elf64_bed elf64_powerpc_fbsd_bed
15856
15857 #include "elf64-target.h"
GDB Binutils - Deliverables
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