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