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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 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_gc_keep ppc64_elf_gc_keep
105 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
106 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
107 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_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 call stub instructions. We enter with the index in R0. */
191 #define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
196 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213 /* Pad with this. */
214 #define NOP 0x60000000
215
216 /* Some other nops. */
217 #define CROR_151515 0x4def7b82
218 #define CROR_313131 0x4ffffb82
219
220 /* .glink entries for the first 32k functions are two instructions. */
221 #define LI_R0_0 0x38000000 /* li %r0,0 */
222 #define B_DOT 0x48000000 /* b . */
223
224 /* After that, we need two instructions to load the index, followed by
225 a branch. */
226 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229 /* Instructions used by the save and restore reg functions. */
230 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236 #define LI_R12_0 0x39800000 /* li %r12,0 */
237 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240 #define BLR 0x4e800020 /* blr */
241
242 /* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246 #ifndef NO_OPD_RELOCS
247 #define NO_OPD_RELOCS 0
248 #endif
249
250 #ifndef ARRAY_SIZE
251 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252 #endif
253
254 static inline int
255 abiversion (bfd *abfd)
256 {
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258 }
259
260 static inline void
261 set_abiversion (bfd *abfd, int ver)
262 {
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265 }
266 \f
267 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269 /* Relocation HOWTO's. */
270 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272 static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213 };
2214
2215 \f
2216 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219 static void
2220 ppc_howto_init (void)
2221 {
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230 }
2231
2232 static reloc_howto_type *
2233 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235 {
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484 };
2485
2486 static reloc_howto_type *
2487 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489 {
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498 }
2499
2500 /* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502 static void
2503 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505 {
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521 }
2522
2523 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525 static bfd_reloc_status_type
2526 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529 {
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569 }
2570
2571 static bfd_reloc_status_type
2572 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575 {
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679 }
2680
2681 static bfd_reloc_status_type
2682 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
2685 {
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_ha_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
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738 return bfd_reloc_continue;
2739 }
2740
2741 static bfd_reloc_status_type
2742 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745 {
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811 }
2812
2813 /* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815 struct got_entry
2816 {
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845 };
2846
2847 /* The same for PLT. */
2848 struct plt_entry
2849 {
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859 };
2860
2861 struct ppc64_elf_obj_tdata
2862 {
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892 };
2893
2894 #define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897 #define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900 #define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904 /* Override the generic function because we store some extras. */
2905
2906 static bfd_boolean
2907 ppc64_elf_mkobject (bfd *abfd)
2908 {
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911 }
2912
2913 /* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916 static bfd_boolean
2917 ppc64_elf_object_p (bfd *abfd)
2918 {
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934 }
2935
2936 /* Support for core dump NOTE sections. */
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959 }
2960
2961 static bfd_boolean
2962 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963 {
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975 }
2976
2977 static char *
2978 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980 {
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022 }
3023
3024 /* Add extra PPC sections. */
3025
3026 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027 {
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035 };
3036
3037 enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041 };
3042
3043 struct _ppc64_elf_section_data
3044 {
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051 #define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077 };
3078
3079 #define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082 static bfd_boolean
3083 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084 {
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097 }
3098
3099 static struct _opd_sec_data *
3100 get_opd_info (asection * sec)
3101 {
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107 }
3108 \f
3109 /* Parameters for the qsort hook. */
3110 static bfd_boolean synthetic_relocatable;
3111 static asection *synthetic_opd;
3112
3113 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115 static int
3116 compare_symbols (const void *ap, const void *bp)
3117 {
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193 }
3194
3195 /* Search SYMS for a symbol of the given VALUE. */
3196
3197 static asymbol *
3198 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199 {
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233 }
3234
3235 static bfd_boolean
3236 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237 {
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242 }
3243
3244 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248 static long
3249 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253 {
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 syms = NULL;
3274 codesecsym = 0;
3275 codesecsymend = 0;
3276 secsymend = 0;
3277 opdsymend = 0;
3278 symcount = 0;
3279 if (opd != NULL)
3280 {
3281 symcount = static_count;
3282 if (!relocatable)
3283 symcount += dyn_count;
3284 if (symcount == 0)
3285 return 0;
3286
3287 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3288 if (syms == NULL)
3289 return -1;
3290
3291 if (!relocatable && static_count != 0 && dyn_count != 0)
3292 {
3293 /* Use both symbol tables. */
3294 memcpy (syms, static_syms, static_count * sizeof (*syms));
3295 memcpy (syms + static_count, dyn_syms,
3296 (dyn_count + 1) * sizeof (*syms));
3297 }
3298 else if (!relocatable && static_count == 0)
3299 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3300 else
3301 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3302
3303 synthetic_relocatable = relocatable;
3304 synthetic_opd = opd;
3305 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3306
3307 if (!relocatable && symcount > 1)
3308 {
3309 long j;
3310 /* Trim duplicate syms, since we may have merged the normal and
3311 dynamic symbols. Actually, we only care about syms that have
3312 different values, so trim any with the same value. */
3313 for (i = 1, j = 1; i < symcount; ++i)
3314 if (syms[i - 1]->value + syms[i - 1]->section->vma
3315 != syms[i]->value + syms[i]->section->vma)
3316 syms[j++] = syms[i];
3317 symcount = j;
3318 }
3319
3320 i = 0;
3321 /* Note that here and in compare_symbols we can't compare opd and
3322 sym->section directly. With separate debug info files, the
3323 symbols will be extracted from the debug file while abfd passed
3324 to this function is the real binary. */
3325 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3326 ++i;
3327 codesecsym = i;
3328
3329 for (; i < symcount; ++i)
3330 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3331 | SEC_THREAD_LOCAL))
3332 != (SEC_CODE | SEC_ALLOC))
3333 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3334 break;
3335 codesecsymend = i;
3336
3337 for (; i < symcount; ++i)
3338 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3339 break;
3340 secsymend = i;
3341
3342 for (; i < symcount; ++i)
3343 if (strcmp (syms[i]->section->name, ".opd") != 0)
3344 break;
3345 opdsymend = i;
3346
3347 for (; i < symcount; ++i)
3348 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3349 != (SEC_CODE | SEC_ALLOC))
3350 break;
3351 symcount = i;
3352 }
3353 count = 0;
3354
3355 if (relocatable)
3356 {
3357 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3358 arelent *r;
3359 size_t size;
3360 long relcount;
3361
3362 if (opdsymend == secsymend)
3363 goto done;
3364
3365 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3366 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3367 if (relcount == 0)
3368 goto done;
3369
3370 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3371 {
3372 count = -1;
3373 goto done;
3374 }
3375
3376 size = 0;
3377 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3378 {
3379 asymbol *sym;
3380
3381 while (r < opd->relocation + relcount
3382 && r->address < syms[i]->value + opd->vma)
3383 ++r;
3384
3385 if (r == opd->relocation + relcount)
3386 break;
3387
3388 if (r->address != syms[i]->value + opd->vma)
3389 continue;
3390
3391 if (r->howto->type != R_PPC64_ADDR64)
3392 continue;
3393
3394 sym = *r->sym_ptr_ptr;
3395 if (!sym_exists_at (syms, opdsymend, symcount,
3396 sym->section->id, sym->value + r->addend))
3397 {
3398 ++count;
3399 size += sizeof (asymbol);
3400 size += strlen (syms[i]->name) + 2;
3401 }
3402 }
3403
3404 if (size == 0)
3405 goto done;
3406 s = *ret = bfd_malloc (size);
3407 if (s == NULL)
3408 {
3409 count = -1;
3410 goto done;
3411 }
3412
3413 names = (char *) (s + count);
3414
3415 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3416 {
3417 asymbol *sym;
3418
3419 while (r < opd->relocation + relcount
3420 && r->address < syms[i]->value + opd->vma)
3421 ++r;
3422
3423 if (r == opd->relocation + relcount)
3424 break;
3425
3426 if (r->address != syms[i]->value + opd->vma)
3427 continue;
3428
3429 if (r->howto->type != R_PPC64_ADDR64)
3430 continue;
3431
3432 sym = *r->sym_ptr_ptr;
3433 if (!sym_exists_at (syms, opdsymend, symcount,
3434 sym->section->id, sym->value + r->addend))
3435 {
3436 size_t len;
3437
3438 *s = *syms[i];
3439 s->flags |= BSF_SYNTHETIC;
3440 s->section = sym->section;
3441 s->value = sym->value + r->addend;
3442 s->name = names;
3443 *names++ = '.';
3444 len = strlen (syms[i]->name);
3445 memcpy (names, syms[i]->name, len + 1);
3446 names += len + 1;
3447 /* Have udata.p point back to the original symbol this
3448 synthetic symbol was derived from. */
3449 s->udata.p = syms[i];
3450 s++;
3451 }
3452 }
3453 }
3454 else
3455 {
3456 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3457 bfd_byte *contents = NULL;
3458 size_t size;
3459 long plt_count = 0;
3460 bfd_vma glink_vma = 0, resolv_vma = 0;
3461 asection *dynamic, *glink = NULL, *relplt = NULL;
3462 arelent *p;
3463
3464 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3465 {
3466 free_contents_and_exit_err:
3467 count = -1;
3468 free_contents_and_exit:
3469 if (contents)
3470 free (contents);
3471 goto done;
3472 }
3473
3474 size = 0;
3475 for (i = secsymend; i < opdsymend; ++i)
3476 {
3477 bfd_vma ent;
3478
3479 /* Ignore bogus symbols. */
3480 if (syms[i]->value > opd->size - 8)
3481 continue;
3482
3483 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3484 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3485 {
3486 ++count;
3487 size += sizeof (asymbol);
3488 size += strlen (syms[i]->name) + 2;
3489 }
3490 }
3491
3492 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3493 if (dyn_count != 0
3494 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3495 {
3496 bfd_byte *dynbuf, *extdyn, *extdynend;
3497 size_t extdynsize;
3498 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3499
3500 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3501 goto free_contents_and_exit_err;
3502
3503 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3504 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3505
3506 extdyn = dynbuf;
3507 extdynend = extdyn + dynamic->size;
3508 for (; extdyn < extdynend; extdyn += extdynsize)
3509 {
3510 Elf_Internal_Dyn dyn;
3511 (*swap_dyn_in) (abfd, extdyn, &dyn);
3512
3513 if (dyn.d_tag == DT_NULL)
3514 break;
3515
3516 if (dyn.d_tag == DT_PPC64_GLINK)
3517 {
3518 /* The first glink stub starts at offset 32; see
3519 comment in ppc64_elf_finish_dynamic_sections. */
3520 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3521 /* The .glink section usually does not survive the final
3522 link; search for the section (usually .text) where the
3523 glink stubs now reside. */
3524 glink = bfd_sections_find_if (abfd, section_covers_vma,
3525 &glink_vma);
3526 break;
3527 }
3528 }
3529
3530 free (dynbuf);
3531 }
3532
3533 if (glink != NULL)
3534 {
3535 /* Determine __glink trampoline by reading the relative branch
3536 from the first glink stub. */
3537 bfd_byte buf[4];
3538 unsigned int off = 0;
3539
3540 while (bfd_get_section_contents (abfd, glink, buf,
3541 glink_vma + off - glink->vma, 4))
3542 {
3543 unsigned int insn = bfd_get_32 (abfd, buf);
3544 insn ^= B_DOT;
3545 if ((insn & ~0x3fffffc) == 0)
3546 {
3547 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3548 break;
3549 }
3550 off += 4;
3551 if (off > 4)
3552 break;
3553 }
3554
3555 if (resolv_vma)
3556 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3557
3558 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3559 if (relplt != NULL)
3560 {
3561 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3562 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3563 goto free_contents_and_exit_err;
3564
3565 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3566 size += plt_count * sizeof (asymbol);
3567
3568 p = relplt->relocation;
3569 for (i = 0; i < plt_count; i++, p++)
3570 {
3571 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3572 if (p->addend != 0)
3573 size += sizeof ("+0x") - 1 + 16;
3574 }
3575 }
3576 }
3577
3578 if (size == 0)
3579 goto free_contents_and_exit;
3580 s = *ret = bfd_malloc (size);
3581 if (s == NULL)
3582 goto free_contents_and_exit_err;
3583
3584 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3585
3586 for (i = secsymend; i < opdsymend; ++i)
3587 {
3588 bfd_vma ent;
3589
3590 if (syms[i]->value > opd->size - 8)
3591 continue;
3592
3593 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3594 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3595 {
3596 long lo, hi;
3597 size_t len;
3598 asection *sec = abfd->sections;
3599
3600 *s = *syms[i];
3601 lo = codesecsym;
3602 hi = codesecsymend;
3603 while (lo < hi)
3604 {
3605 long mid = (lo + hi) >> 1;
3606 if (syms[mid]->section->vma < ent)
3607 lo = mid + 1;
3608 else if (syms[mid]->section->vma > ent)
3609 hi = mid;
3610 else
3611 {
3612 sec = syms[mid]->section;
3613 break;
3614 }
3615 }
3616
3617 if (lo >= hi && lo > codesecsym)
3618 sec = syms[lo - 1]->section;
3619
3620 for (; sec != NULL; sec = sec->next)
3621 {
3622 if (sec->vma > ent)
3623 break;
3624 /* SEC_LOAD may not be set if SEC is from a separate debug
3625 info file. */
3626 if ((sec->flags & SEC_ALLOC) == 0)
3627 break;
3628 if ((sec->flags & SEC_CODE) != 0)
3629 s->section = sec;
3630 }
3631 s->flags |= BSF_SYNTHETIC;
3632 s->value = ent - s->section->vma;
3633 s->name = names;
3634 *names++ = '.';
3635 len = strlen (syms[i]->name);
3636 memcpy (names, syms[i]->name, len + 1);
3637 names += len + 1;
3638 /* Have udata.p point back to the original symbol this
3639 synthetic symbol was derived from. */
3640 s->udata.p = syms[i];
3641 s++;
3642 }
3643 }
3644 free (contents);
3645
3646 if (glink != NULL && relplt != NULL)
3647 {
3648 if (resolv_vma)
3649 {
3650 /* Add a symbol for the main glink trampoline. */
3651 memset (s, 0, sizeof *s);
3652 s->the_bfd = abfd;
3653 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3654 s->section = glink;
3655 s->value = resolv_vma - glink->vma;
3656 s->name = names;
3657 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3658 names += sizeof ("__glink_PLTresolve");
3659 s++;
3660 count++;
3661 }
3662
3663 /* FIXME: It would be very much nicer to put sym@plt on the
3664 stub rather than on the glink branch table entry. The
3665 objdump disassembler would then use a sensible symbol
3666 name on plt calls. The difficulty in doing so is
3667 a) finding the stubs, and,
3668 b) matching stubs against plt entries, and,
3669 c) there can be multiple stubs for a given plt entry.
3670
3671 Solving (a) could be done by code scanning, but older
3672 ppc64 binaries used different stubs to current code.
3673 (b) is the tricky one since you need to known the toc
3674 pointer for at least one function that uses a pic stub to
3675 be able to calculate the plt address referenced.
3676 (c) means gdb would need to set multiple breakpoints (or
3677 find the glink branch itself) when setting breakpoints
3678 for pending shared library loads. */
3679 p = relplt->relocation;
3680 for (i = 0; i < plt_count; i++, p++)
3681 {
3682 size_t len;
3683
3684 *s = **p->sym_ptr_ptr;
3685 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3686 we are defining a symbol, ensure one of them is set. */
3687 if ((s->flags & BSF_LOCAL) == 0)
3688 s->flags |= BSF_GLOBAL;
3689 s->flags |= BSF_SYNTHETIC;
3690 s->section = glink;
3691 s->value = glink_vma - glink->vma;
3692 s->name = names;
3693 s->udata.p = NULL;
3694 len = strlen ((*p->sym_ptr_ptr)->name);
3695 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3696 names += len;
3697 if (p->addend != 0)
3698 {
3699 memcpy (names, "+0x", sizeof ("+0x") - 1);
3700 names += sizeof ("+0x") - 1;
3701 bfd_sprintf_vma (abfd, names, p->addend);
3702 names += strlen (names);
3703 }
3704 memcpy (names, "@plt", sizeof ("@plt"));
3705 names += sizeof ("@plt");
3706 s++;
3707 if (abi < 2)
3708 {
3709 glink_vma += 8;
3710 if (i >= 0x8000)
3711 glink_vma += 4;
3712 }
3713 else
3714 glink_vma += 4;
3715 }
3716 count += plt_count;
3717 }
3718 }
3719
3720 done:
3721 free (syms);
3722 return count;
3723 }
3724 \f
3725 /* The following functions are specific to the ELF linker, while
3726 functions above are used generally. Those named ppc64_elf_* are
3727 called by the main ELF linker code. They appear in this file more
3728 or less in the order in which they are called. eg.
3729 ppc64_elf_check_relocs is called early in the link process,
3730 ppc64_elf_finish_dynamic_sections is one of the last functions
3731 called.
3732
3733 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3734 functions have both a function code symbol and a function descriptor
3735 symbol. A call to foo in a relocatable object file looks like:
3736
3737 . .text
3738 . x:
3739 . bl .foo
3740 . nop
3741
3742 The function definition in another object file might be:
3743
3744 . .section .opd
3745 . foo: .quad .foo
3746 . .quad .TOC.@tocbase
3747 . .quad 0
3748 .
3749 . .text
3750 . .foo: blr
3751
3752 When the linker resolves the call during a static link, the branch
3753 unsurprisingly just goes to .foo and the .opd information is unused.
3754 If the function definition is in a shared library, things are a little
3755 different: The call goes via a plt call stub, the opd information gets
3756 copied to the plt, and the linker patches the nop.
3757
3758 . x:
3759 . bl .foo_stub
3760 . ld 2,40(1)
3761 .
3762 .
3763 . .foo_stub:
3764 . std 2,40(1) # in practice, the call stub
3765 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3766 . addi 11,11,Lfoo@toc@l # this is the general idea
3767 . ld 12,0(11)
3768 . ld 2,8(11)
3769 . mtctr 12
3770 . ld 11,16(11)
3771 . bctr
3772 .
3773 . .section .plt
3774 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3775
3776 The "reloc ()" notation is supposed to indicate that the linker emits
3777 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3778 copying.
3779
3780 What are the difficulties here? Well, firstly, the relocations
3781 examined by the linker in check_relocs are against the function code
3782 sym .foo, while the dynamic relocation in the plt is emitted against
3783 the function descriptor symbol, foo. Somewhere along the line, we need
3784 to carefully copy dynamic link information from one symbol to the other.
3785 Secondly, the generic part of the elf linker will make .foo a dynamic
3786 symbol as is normal for most other backends. We need foo dynamic
3787 instead, at least for an application final link. However, when
3788 creating a shared library containing foo, we need to have both symbols
3789 dynamic so that references to .foo are satisfied during the early
3790 stages of linking. Otherwise the linker might decide to pull in a
3791 definition from some other object, eg. a static library.
3792
3793 Update: As of August 2004, we support a new convention. Function
3794 calls may use the function descriptor symbol, ie. "bl foo". This
3795 behaves exactly as "bl .foo". */
3796
3797 /* Of those relocs that might be copied as dynamic relocs, this
3798 function selects those that must be copied when linking a shared
3799 library or PIE, even when the symbol is local. */
3800
3801 static int
3802 must_be_dyn_reloc (struct bfd_link_info *info,
3803 enum elf_ppc64_reloc_type r_type)
3804 {
3805 switch (r_type)
3806 {
3807 default:
3808 /* Only relative relocs can be resolved when the object load
3809 address isn't fixed. DTPREL64 is excluded because the
3810 dynamic linker needs to differentiate global dynamic from
3811 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3812 return 1;
3813
3814 case R_PPC64_REL32:
3815 case R_PPC64_REL64:
3816 case R_PPC64_REL30:
3817 return 0;
3818
3819 case R_PPC64_TPREL16:
3820 case R_PPC64_TPREL16_LO:
3821 case R_PPC64_TPREL16_HI:
3822 case R_PPC64_TPREL16_HA:
3823 case R_PPC64_TPREL16_DS:
3824 case R_PPC64_TPREL16_LO_DS:
3825 case R_PPC64_TPREL16_HIGH:
3826 case R_PPC64_TPREL16_HIGHA:
3827 case R_PPC64_TPREL16_HIGHER:
3828 case R_PPC64_TPREL16_HIGHERA:
3829 case R_PPC64_TPREL16_HIGHEST:
3830 case R_PPC64_TPREL16_HIGHESTA:
3831 case R_PPC64_TPREL64:
3832 /* These relocations are relative but in a shared library the
3833 linker doesn't know the thread pointer base. */
3834 return bfd_link_dll (info);
3835 }
3836 }
3837
3838 /* Whether an undefined weak symbol should resolve to its link-time
3839 value, even in PIC or PIE objects. */
3840 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3841 ((H)->root.type == bfd_link_hash_undefweak \
3842 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3843 || (INFO)->dynamic_undefined_weak == 0))
3844
3845 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3846 copying dynamic variables from a shared lib into an app's dynbss
3847 section, and instead use a dynamic relocation to point into the
3848 shared lib. With code that gcc generates, it's vital that this be
3849 enabled; In the PowerPC64 ABI, the address of a function is actually
3850 the address of a function descriptor, which resides in the .opd
3851 section. gcc uses the descriptor directly rather than going via the
3852 GOT as some other ABI's do, which means that initialized function
3853 pointers must reference the descriptor. Thus, a function pointer
3854 initialized to the address of a function in a shared library will
3855 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3856 redefines the function descriptor symbol to point to the copy. This
3857 presents a problem as a plt entry for that function is also
3858 initialized from the function descriptor symbol and the copy reloc
3859 may not be initialized first. */
3860 #define ELIMINATE_COPY_RELOCS 1
3861
3862 /* Section name for stubs is the associated section name plus this
3863 string. */
3864 #define STUB_SUFFIX ".stub"
3865
3866 /* Linker stubs.
3867 ppc_stub_long_branch:
3868 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3869 destination, but a 24 bit branch in a stub section will reach.
3870 . b dest
3871
3872 ppc_stub_plt_branch:
3873 Similar to the above, but a 24 bit branch in the stub section won't
3874 reach its destination.
3875 . addis %r11,%r2,xxx@toc@ha
3876 . ld %r12,xxx@toc@l(%r11)
3877 . mtctr %r12
3878 . bctr
3879
3880 ppc_stub_plt_call:
3881 Used to call a function in a shared library. If it so happens that
3882 the plt entry referenced crosses a 64k boundary, then an extra
3883 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3884 . std %r2,40(%r1)
3885 . addis %r11,%r2,xxx@toc@ha
3886 . ld %r12,xxx+0@toc@l(%r11)
3887 . mtctr %r12
3888 . ld %r2,xxx+8@toc@l(%r11)
3889 . ld %r11,xxx+16@toc@l(%r11)
3890 . bctr
3891
3892 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3893 code to adjust the value and save r2 to support multiple toc sections.
3894 A ppc_stub_long_branch with an r2 offset looks like:
3895 . std %r2,40(%r1)
3896 . addis %r2,%r2,off@ha
3897 . addi %r2,%r2,off@l
3898 . b dest
3899
3900 A ppc_stub_plt_branch with an r2 offset looks like:
3901 . std %r2,40(%r1)
3902 . addis %r11,%r2,xxx@toc@ha
3903 . ld %r12,xxx@toc@l(%r11)
3904 . addis %r2,%r2,off@ha
3905 . addi %r2,%r2,off@l
3906 . mtctr %r12
3907 . bctr
3908
3909 In cases where the "addis" instruction would add zero, the "addis" is
3910 omitted and following instructions modified slightly in some cases.
3911 */
3912
3913 enum ppc_stub_type {
3914 ppc_stub_none,
3915 ppc_stub_long_branch,
3916 ppc_stub_long_branch_r2off,
3917 ppc_stub_plt_branch,
3918 ppc_stub_plt_branch_r2off,
3919 ppc_stub_plt_call,
3920 ppc_stub_plt_call_r2save,
3921 ppc_stub_global_entry,
3922 ppc_stub_save_res
3923 };
3924
3925 /* Information on stub grouping. */
3926 struct map_stub
3927 {
3928 /* The stub section. */
3929 asection *stub_sec;
3930 /* This is the section to which stubs in the group will be attached. */
3931 asection *link_sec;
3932 /* Next group. */
3933 struct map_stub *next;
3934 /* Whether to emit a copy of register save/restore functions in this
3935 group. */
3936 int needs_save_res;
3937 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3938 or -1u if no such stub with bctrl exists. */
3939 unsigned int tls_get_addr_opt_bctrl;
3940 };
3941
3942 struct ppc_stub_hash_entry {
3943
3944 /* Base hash table entry structure. */
3945 struct bfd_hash_entry root;
3946
3947 enum ppc_stub_type stub_type;
3948
3949 /* Group information. */
3950 struct map_stub *group;
3951
3952 /* Offset within stub_sec of the beginning of this stub. */
3953 bfd_vma stub_offset;
3954
3955 /* Given the symbol's value and its section we can determine its final
3956 value when building the stubs (so the stub knows where to jump. */
3957 bfd_vma target_value;
3958 asection *target_section;
3959
3960 /* The symbol table entry, if any, that this was derived from. */
3961 struct ppc_link_hash_entry *h;
3962 struct plt_entry *plt_ent;
3963
3964 /* Symbol st_other. */
3965 unsigned char other;
3966 };
3967
3968 struct ppc_branch_hash_entry {
3969
3970 /* Base hash table entry structure. */
3971 struct bfd_hash_entry root;
3972
3973 /* Offset within branch lookup table. */
3974 unsigned int offset;
3975
3976 /* Generation marker. */
3977 unsigned int iter;
3978 };
3979
3980 /* Used to track dynamic relocations for local symbols. */
3981 struct ppc_dyn_relocs
3982 {
3983 struct ppc_dyn_relocs *next;
3984
3985 /* The input section of the reloc. */
3986 asection *sec;
3987
3988 /* Total number of relocs copied for the input section. */
3989 unsigned int count : 31;
3990
3991 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3992 unsigned int ifunc : 1;
3993 };
3994
3995 struct ppc_link_hash_entry
3996 {
3997 struct elf_link_hash_entry elf;
3998
3999 union {
4000 /* A pointer to the most recently used stub hash entry against this
4001 symbol. */
4002 struct ppc_stub_hash_entry *stub_cache;
4003
4004 /* A pointer to the next symbol starting with a '.' */
4005 struct ppc_link_hash_entry *next_dot_sym;
4006 } u;
4007
4008 /* Track dynamic relocs copied for this symbol. */
4009 struct elf_dyn_relocs *dyn_relocs;
4010
4011 /* Chain of aliases referring to a weakdef. */
4012 struct ppc_link_hash_entry *weakref;
4013
4014 /* Link between function code and descriptor symbols. */
4015 struct ppc_link_hash_entry *oh;
4016
4017 /* Flag function code and descriptor symbols. */
4018 unsigned int is_func:1;
4019 unsigned int is_func_descriptor:1;
4020 unsigned int fake:1;
4021
4022 /* Whether global opd/toc sym has been adjusted or not.
4023 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4024 should be set for all globals defined in any opd/toc section. */
4025 unsigned int adjust_done:1;
4026
4027 /* Set if this is an out-of-line register save/restore function,
4028 with non-standard calling convention. */
4029 unsigned int save_res:1;
4030
4031 /* Set if a duplicate symbol with non-zero localentry is detected,
4032 even when the duplicate symbol does not provide a definition. */
4033 unsigned int non_zero_localentry:1;
4034
4035 /* Contexts in which symbol is used in the GOT (or TOC).
4036 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4037 corresponding relocs are encountered during check_relocs.
4038 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4039 indicate the corresponding GOT entry type is not needed.
4040 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4041 a TPREL one. We use a separate flag rather than setting TPREL
4042 just for convenience in distinguishing the two cases. */
4043 #define TLS_GD 1 /* GD reloc. */
4044 #define TLS_LD 2 /* LD reloc. */
4045 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4046 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4047 #define TLS_TLS 16 /* Any TLS reloc. */
4048 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4049 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4050 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4051 unsigned char tls_mask;
4052 };
4053
4054 /* ppc64 ELF linker hash table. */
4055
4056 struct ppc_link_hash_table
4057 {
4058 struct elf_link_hash_table elf;
4059
4060 /* The stub hash table. */
4061 struct bfd_hash_table stub_hash_table;
4062
4063 /* Another hash table for plt_branch stubs. */
4064 struct bfd_hash_table branch_hash_table;
4065
4066 /* Hash table for function prologue tocsave. */
4067 htab_t tocsave_htab;
4068
4069 /* Various options and other info passed from the linker. */
4070 struct ppc64_elf_params *params;
4071
4072 /* The size of sec_info below. */
4073 unsigned int sec_info_arr_size;
4074
4075 /* Per-section array of extra section info. Done this way rather
4076 than as part of ppc64_elf_section_data so we have the info for
4077 non-ppc64 sections. */
4078 struct
4079 {
4080 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4081 bfd_vma toc_off;
4082
4083 union
4084 {
4085 /* The section group that this section belongs to. */
4086 struct map_stub *group;
4087 /* A temp section list pointer. */
4088 asection *list;
4089 } u;
4090 } *sec_info;
4091
4092 /* Linked list of groups. */
4093 struct map_stub *group;
4094
4095 /* Temp used when calculating TOC pointers. */
4096 bfd_vma toc_curr;
4097 bfd *toc_bfd;
4098 asection *toc_first_sec;
4099
4100 /* Used when adding symbols. */
4101 struct ppc_link_hash_entry *dot_syms;
4102
4103 /* Shortcuts to get to dynamic linker sections. */
4104 asection *glink;
4105 asection *sfpr;
4106 asection *brlt;
4107 asection *relbrlt;
4108 asection *glink_eh_frame;
4109
4110 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4111 struct ppc_link_hash_entry *tls_get_addr;
4112 struct ppc_link_hash_entry *tls_get_addr_fd;
4113
4114 /* The size of reliplt used by got entry relocs. */
4115 bfd_size_type got_reli_size;
4116
4117 /* Statistics. */
4118 unsigned long stub_count[ppc_stub_global_entry];
4119
4120 /* Number of stubs against global syms. */
4121 unsigned long stub_globals;
4122
4123 /* Set if we're linking code with function descriptors. */
4124 unsigned int opd_abi:1;
4125
4126 /* Support for multiple toc sections. */
4127 unsigned int do_multi_toc:1;
4128 unsigned int multi_toc_needed:1;
4129 unsigned int second_toc_pass:1;
4130 unsigned int do_toc_opt:1;
4131
4132 /* Set if tls optimization is enabled. */
4133 unsigned int do_tls_opt:1;
4134
4135 /* Set on error. */
4136 unsigned int stub_error:1;
4137
4138 /* Whether func_desc_adjust needs to be run over symbols. */
4139 unsigned int need_func_desc_adj:1;
4140
4141 /* Whether there exist local gnu indirect function resolvers,
4142 referenced by dynamic relocations. */
4143 unsigned int local_ifunc_resolver:1;
4144 unsigned int maybe_local_ifunc_resolver:1;
4145
4146 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4147 unsigned int has_plt_localentry0:1;
4148
4149 /* Incremented every time we size stubs. */
4150 unsigned int stub_iteration;
4151
4152 /* Small local sym cache. */
4153 struct sym_cache sym_cache;
4154 };
4155
4156 /* Rename some of the generic section flags to better document how they
4157 are used here. */
4158
4159 /* Nonzero if this section has TLS related relocations. */
4160 #define has_tls_reloc sec_flg0
4161
4162 /* Nonzero if this section has a call to __tls_get_addr. */
4163 #define has_tls_get_addr_call sec_flg1
4164
4165 /* Nonzero if this section has any toc or got relocs. */
4166 #define has_toc_reloc sec_flg2
4167
4168 /* Nonzero if this section has a call to another section that uses
4169 the toc or got. */
4170 #define makes_toc_func_call sec_flg3
4171
4172 /* Recursion protection when determining above flag. */
4173 #define call_check_in_progress sec_flg4
4174 #define call_check_done sec_flg5
4175
4176 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4177
4178 #define ppc_hash_table(p) \
4179 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4180 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4181
4182 #define ppc_stub_hash_lookup(table, string, create, copy) \
4183 ((struct ppc_stub_hash_entry *) \
4184 bfd_hash_lookup ((table), (string), (create), (copy)))
4185
4186 #define ppc_branch_hash_lookup(table, string, create, copy) \
4187 ((struct ppc_branch_hash_entry *) \
4188 bfd_hash_lookup ((table), (string), (create), (copy)))
4189
4190 /* Create an entry in the stub hash table. */
4191
4192 static struct bfd_hash_entry *
4193 stub_hash_newfunc (struct bfd_hash_entry *entry,
4194 struct bfd_hash_table *table,
4195 const char *string)
4196 {
4197 /* Allocate the structure if it has not already been allocated by a
4198 subclass. */
4199 if (entry == NULL)
4200 {
4201 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4202 if (entry == NULL)
4203 return entry;
4204 }
4205
4206 /* Call the allocation method of the superclass. */
4207 entry = bfd_hash_newfunc (entry, table, string);
4208 if (entry != NULL)
4209 {
4210 struct ppc_stub_hash_entry *eh;
4211
4212 /* Initialize the local fields. */
4213 eh = (struct ppc_stub_hash_entry *) entry;
4214 eh->stub_type = ppc_stub_none;
4215 eh->group = NULL;
4216 eh->stub_offset = 0;
4217 eh->target_value = 0;
4218 eh->target_section = NULL;
4219 eh->h = NULL;
4220 eh->plt_ent = NULL;
4221 eh->other = 0;
4222 }
4223
4224 return entry;
4225 }
4226
4227 /* Create an entry in the branch hash table. */
4228
4229 static struct bfd_hash_entry *
4230 branch_hash_newfunc (struct bfd_hash_entry *entry,
4231 struct bfd_hash_table *table,
4232 const char *string)
4233 {
4234 /* Allocate the structure if it has not already been allocated by a
4235 subclass. */
4236 if (entry == NULL)
4237 {
4238 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4239 if (entry == NULL)
4240 return entry;
4241 }
4242
4243 /* Call the allocation method of the superclass. */
4244 entry = bfd_hash_newfunc (entry, table, string);
4245 if (entry != NULL)
4246 {
4247 struct ppc_branch_hash_entry *eh;
4248
4249 /* Initialize the local fields. */
4250 eh = (struct ppc_branch_hash_entry *) entry;
4251 eh->offset = 0;
4252 eh->iter = 0;
4253 }
4254
4255 return entry;
4256 }
4257
4258 /* Create an entry in a ppc64 ELF linker hash table. */
4259
4260 static struct bfd_hash_entry *
4261 link_hash_newfunc (struct bfd_hash_entry *entry,
4262 struct bfd_hash_table *table,
4263 const char *string)
4264 {
4265 /* Allocate the structure if it has not already been allocated by a
4266 subclass. */
4267 if (entry == NULL)
4268 {
4269 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4270 if (entry == NULL)
4271 return entry;
4272 }
4273
4274 /* Call the allocation method of the superclass. */
4275 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4276 if (entry != NULL)
4277 {
4278 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4279
4280 memset (&eh->u.stub_cache, 0,
4281 (sizeof (struct ppc_link_hash_entry)
4282 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4283
4284 /* When making function calls, old ABI code references function entry
4285 points (dot symbols), while new ABI code references the function
4286 descriptor symbol. We need to make any combination of reference and
4287 definition work together, without breaking archive linking.
4288
4289 For a defined function "foo" and an undefined call to "bar":
4290 An old object defines "foo" and ".foo", references ".bar" (possibly
4291 "bar" too).
4292 A new object defines "foo" and references "bar".
4293
4294 A new object thus has no problem with its undefined symbols being
4295 satisfied by definitions in an old object. On the other hand, the
4296 old object won't have ".bar" satisfied by a new object.
4297
4298 Keep a list of newly added dot-symbols. */
4299
4300 if (string[0] == '.')
4301 {
4302 struct ppc_link_hash_table *htab;
4303
4304 htab = (struct ppc_link_hash_table *) table;
4305 eh->u.next_dot_sym = htab->dot_syms;
4306 htab->dot_syms = eh;
4307 }
4308 }
4309
4310 return entry;
4311 }
4312
4313 struct tocsave_entry {
4314 asection *sec;
4315 bfd_vma offset;
4316 };
4317
4318 static hashval_t
4319 tocsave_htab_hash (const void *p)
4320 {
4321 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4322 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4323 }
4324
4325 static int
4326 tocsave_htab_eq (const void *p1, const void *p2)
4327 {
4328 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4329 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4330 return e1->sec == e2->sec && e1->offset == e2->offset;
4331 }
4332
4333 /* Destroy a ppc64 ELF linker hash table. */
4334
4335 static void
4336 ppc64_elf_link_hash_table_free (bfd *obfd)
4337 {
4338 struct ppc_link_hash_table *htab;
4339
4340 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4341 if (htab->tocsave_htab)
4342 htab_delete (htab->tocsave_htab);
4343 bfd_hash_table_free (&htab->branch_hash_table);
4344 bfd_hash_table_free (&htab->stub_hash_table);
4345 _bfd_elf_link_hash_table_free (obfd);
4346 }
4347
4348 /* Create a ppc64 ELF linker hash table. */
4349
4350 static struct bfd_link_hash_table *
4351 ppc64_elf_link_hash_table_create (bfd *abfd)
4352 {
4353 struct ppc_link_hash_table *htab;
4354 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4355
4356 htab = bfd_zmalloc (amt);
4357 if (htab == NULL)
4358 return NULL;
4359
4360 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4361 sizeof (struct ppc_link_hash_entry),
4362 PPC64_ELF_DATA))
4363 {
4364 free (htab);
4365 return NULL;
4366 }
4367
4368 /* Init the stub hash table too. */
4369 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4370 sizeof (struct ppc_stub_hash_entry)))
4371 {
4372 _bfd_elf_link_hash_table_free (abfd);
4373 return NULL;
4374 }
4375
4376 /* And the branch hash table. */
4377 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4378 sizeof (struct ppc_branch_hash_entry)))
4379 {
4380 bfd_hash_table_free (&htab->stub_hash_table);
4381 _bfd_elf_link_hash_table_free (abfd);
4382 return NULL;
4383 }
4384
4385 htab->tocsave_htab = htab_try_create (1024,
4386 tocsave_htab_hash,
4387 tocsave_htab_eq,
4388 NULL);
4389 if (htab->tocsave_htab == NULL)
4390 {
4391 ppc64_elf_link_hash_table_free (abfd);
4392 return NULL;
4393 }
4394 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4395
4396 /* Initializing two fields of the union is just cosmetic. We really
4397 only care about glist, but when compiled on a 32-bit host the
4398 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4399 debugger inspection of these fields look nicer. */
4400 htab->elf.init_got_refcount.refcount = 0;
4401 htab->elf.init_got_refcount.glist = NULL;
4402 htab->elf.init_plt_refcount.refcount = 0;
4403 htab->elf.init_plt_refcount.glist = NULL;
4404 htab->elf.init_got_offset.offset = 0;
4405 htab->elf.init_got_offset.glist = NULL;
4406 htab->elf.init_plt_offset.offset = 0;
4407 htab->elf.init_plt_offset.glist = NULL;
4408
4409 return &htab->elf.root;
4410 }
4411
4412 /* Create sections for linker generated code. */
4413
4414 static bfd_boolean
4415 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4416 {
4417 struct ppc_link_hash_table *htab;
4418 flagword flags;
4419
4420 htab = ppc_hash_table (info);
4421
4422 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4423 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4424 if (htab->params->save_restore_funcs)
4425 {
4426 /* Create .sfpr for code to save and restore fp regs. */
4427 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4428 flags);
4429 if (htab->sfpr == NULL
4430 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4431 return FALSE;
4432 }
4433
4434 if (bfd_link_relocatable (info))
4435 return TRUE;
4436
4437 /* Create .glink for lazy dynamic linking support. */
4438 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4439 flags);
4440 if (htab->glink == NULL
4441 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4442 return FALSE;
4443
4444 if (!info->no_ld_generated_unwind_info)
4445 {
4446 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4447 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4448 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4449 ".eh_frame",
4450 flags);
4451 if (htab->glink_eh_frame == NULL
4452 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4453 return FALSE;
4454 }
4455
4456 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4457 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4458 if (htab->elf.iplt == NULL
4459 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4460 return FALSE;
4461
4462 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4463 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4464 htab->elf.irelplt
4465 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4466 if (htab->elf.irelplt == NULL
4467 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4468 return FALSE;
4469
4470 /* Create branch lookup table for plt_branch stubs. */
4471 flags = (SEC_ALLOC | SEC_LOAD
4472 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4473 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4474 flags);
4475 if (htab->brlt == NULL
4476 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4477 return FALSE;
4478
4479 if (!bfd_link_pic (info))
4480 return TRUE;
4481
4482 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4483 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4484 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4485 ".rela.branch_lt",
4486 flags);
4487 if (htab->relbrlt == NULL
4488 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4489 return FALSE;
4490
4491 return TRUE;
4492 }
4493
4494 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4495
4496 bfd_boolean
4497 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4498 struct ppc64_elf_params *params)
4499 {
4500 struct ppc_link_hash_table *htab;
4501
4502 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4503
4504 /* Always hook our dynamic sections into the first bfd, which is the
4505 linker created stub bfd. This ensures that the GOT header is at
4506 the start of the output TOC section. */
4507 htab = ppc_hash_table (info);
4508 htab->elf.dynobj = params->stub_bfd;
4509 htab->params = params;
4510
4511 return create_linkage_sections (htab->elf.dynobj, info);
4512 }
4513
4514 /* Build a name for an entry in the stub hash table. */
4515
4516 static char *
4517 ppc_stub_name (const asection *input_section,
4518 const asection *sym_sec,
4519 const struct ppc_link_hash_entry *h,
4520 const Elf_Internal_Rela *rel)
4521 {
4522 char *stub_name;
4523 ssize_t len;
4524
4525 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4526 offsets from a sym as a branch target? In fact, we could
4527 probably assume the addend is always zero. */
4528 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4529
4530 if (h)
4531 {
4532 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4533 stub_name = bfd_malloc (len);
4534 if (stub_name == NULL)
4535 return stub_name;
4536
4537 len = sprintf (stub_name, "%08x.%s+%x",
4538 input_section->id & 0xffffffff,
4539 h->elf.root.root.string,
4540 (int) rel->r_addend & 0xffffffff);
4541 }
4542 else
4543 {
4544 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4545 stub_name = bfd_malloc (len);
4546 if (stub_name == NULL)
4547 return stub_name;
4548
4549 len = sprintf (stub_name, "%08x.%x:%x+%x",
4550 input_section->id & 0xffffffff,
4551 sym_sec->id & 0xffffffff,
4552 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4553 (int) rel->r_addend & 0xffffffff);
4554 }
4555 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4556 stub_name[len - 2] = 0;
4557 return stub_name;
4558 }
4559
4560 /* Look up an entry in the stub hash. Stub entries are cached because
4561 creating the stub name takes a bit of time. */
4562
4563 static struct ppc_stub_hash_entry *
4564 ppc_get_stub_entry (const asection *input_section,
4565 const asection *sym_sec,
4566 struct ppc_link_hash_entry *h,
4567 const Elf_Internal_Rela *rel,
4568 struct ppc_link_hash_table *htab)
4569 {
4570 struct ppc_stub_hash_entry *stub_entry;
4571 struct map_stub *group;
4572
4573 /* If this input section is part of a group of sections sharing one
4574 stub section, then use the id of the first section in the group.
4575 Stub names need to include a section id, as there may well be
4576 more than one stub used to reach say, printf, and we need to
4577 distinguish between them. */
4578 group = htab->sec_info[input_section->id].u.group;
4579 if (group == NULL)
4580 return NULL;
4581
4582 if (h != NULL && h->u.stub_cache != NULL
4583 && h->u.stub_cache->h == h
4584 && h->u.stub_cache->group == group)
4585 {
4586 stub_entry = h->u.stub_cache;
4587 }
4588 else
4589 {
4590 char *stub_name;
4591
4592 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4593 if (stub_name == NULL)
4594 return NULL;
4595
4596 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4597 stub_name, FALSE, FALSE);
4598 if (h != NULL)
4599 h->u.stub_cache = stub_entry;
4600
4601 free (stub_name);
4602 }
4603
4604 return stub_entry;
4605 }
4606
4607 /* Add a new stub entry to the stub hash. Not all fields of the new
4608 stub entry are initialised. */
4609
4610 static struct ppc_stub_hash_entry *
4611 ppc_add_stub (const char *stub_name,
4612 asection *section,
4613 struct bfd_link_info *info)
4614 {
4615 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4616 struct map_stub *group;
4617 asection *link_sec;
4618 asection *stub_sec;
4619 struct ppc_stub_hash_entry *stub_entry;
4620
4621 group = htab->sec_info[section->id].u.group;
4622 link_sec = group->link_sec;
4623 stub_sec = group->stub_sec;
4624 if (stub_sec == NULL)
4625 {
4626 size_t namelen;
4627 bfd_size_type len;
4628 char *s_name;
4629
4630 namelen = strlen (link_sec->name);
4631 len = namelen + sizeof (STUB_SUFFIX);
4632 s_name = bfd_alloc (htab->params->stub_bfd, len);
4633 if (s_name == NULL)
4634 return NULL;
4635
4636 memcpy (s_name, link_sec->name, namelen);
4637 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4638 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4639 if (stub_sec == NULL)
4640 return NULL;
4641 group->stub_sec = stub_sec;
4642 }
4643
4644 /* Enter this entry into the linker stub hash table. */
4645 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4646 TRUE, FALSE);
4647 if (stub_entry == NULL)
4648 {
4649 /* xgettext:c-format */
4650 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4651 section->owner, stub_name);
4652 return NULL;
4653 }
4654
4655 stub_entry->group = group;
4656 stub_entry->stub_offset = 0;
4657 return stub_entry;
4658 }
4659
4660 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4661 not already done. */
4662
4663 static bfd_boolean
4664 create_got_section (bfd *abfd, struct bfd_link_info *info)
4665 {
4666 asection *got, *relgot;
4667 flagword flags;
4668 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4669
4670 if (!is_ppc64_elf (abfd))
4671 return FALSE;
4672 if (htab == NULL)
4673 return FALSE;
4674
4675 if (!htab->elf.sgot
4676 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4677 return FALSE;
4678
4679 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4680 | SEC_LINKER_CREATED);
4681
4682 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4683 if (!got
4684 || !bfd_set_section_alignment (abfd, got, 3))
4685 return FALSE;
4686
4687 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4688 flags | SEC_READONLY);
4689 if (!relgot
4690 || ! bfd_set_section_alignment (abfd, relgot, 3))
4691 return FALSE;
4692
4693 ppc64_elf_tdata (abfd)->got = got;
4694 ppc64_elf_tdata (abfd)->relgot = relgot;
4695 return TRUE;
4696 }
4697
4698 /* Follow indirect and warning symbol links. */
4699
4700 static inline struct bfd_link_hash_entry *
4701 follow_link (struct bfd_link_hash_entry *h)
4702 {
4703 while (h->type == bfd_link_hash_indirect
4704 || h->type == bfd_link_hash_warning)
4705 h = h->u.i.link;
4706 return h;
4707 }
4708
4709 static inline struct elf_link_hash_entry *
4710 elf_follow_link (struct elf_link_hash_entry *h)
4711 {
4712 return (struct elf_link_hash_entry *) follow_link (&h->root);
4713 }
4714
4715 static inline struct ppc_link_hash_entry *
4716 ppc_follow_link (struct ppc_link_hash_entry *h)
4717 {
4718 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4719 }
4720
4721 /* Merge PLT info on FROM with that on TO. */
4722
4723 static void
4724 move_plt_plist (struct ppc_link_hash_entry *from,
4725 struct ppc_link_hash_entry *to)
4726 {
4727 if (from->elf.plt.plist != NULL)
4728 {
4729 if (to->elf.plt.plist != NULL)
4730 {
4731 struct plt_entry **entp;
4732 struct plt_entry *ent;
4733
4734 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4735 {
4736 struct plt_entry *dent;
4737
4738 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4739 if (dent->addend == ent->addend)
4740 {
4741 dent->plt.refcount += ent->plt.refcount;
4742 *entp = ent->next;
4743 break;
4744 }
4745 if (dent == NULL)
4746 entp = &ent->next;
4747 }
4748 *entp = to->elf.plt.plist;
4749 }
4750
4751 to->elf.plt.plist = from->elf.plt.plist;
4752 from->elf.plt.plist = NULL;
4753 }
4754 }
4755
4756 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4757
4758 static void
4759 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4760 struct elf_link_hash_entry *dir,
4761 struct elf_link_hash_entry *ind)
4762 {
4763 struct ppc_link_hash_entry *edir, *eind;
4764
4765 edir = (struct ppc_link_hash_entry *) dir;
4766 eind = (struct ppc_link_hash_entry *) ind;
4767
4768 edir->is_func |= eind->is_func;
4769 edir->is_func_descriptor |= eind->is_func_descriptor;
4770 edir->tls_mask |= eind->tls_mask;
4771 if (eind->oh != NULL)
4772 edir->oh = ppc_follow_link (eind->oh);
4773
4774 /* If called to transfer flags for a weakdef during processing
4775 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4776 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4777 if (!(ELIMINATE_COPY_RELOCS
4778 && eind->elf.root.type != bfd_link_hash_indirect
4779 && edir->elf.dynamic_adjusted))
4780 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4781
4782 if (edir->elf.versioned != versioned_hidden)
4783 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4784 edir->elf.ref_regular |= eind->elf.ref_regular;
4785 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4786 edir->elf.needs_plt |= eind->elf.needs_plt;
4787 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4788
4789 /* If we were called to copy over info for a weak sym, don't copy
4790 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4791 in order to simplify readonly_dynrelocs and save a field in the
4792 symbol hash entry, but that means dyn_relocs can't be used in any
4793 tests about a specific symbol, or affect other symbol flags which
4794 are then tested.
4795 Chain weakdefs so we can get from the weakdef back to an alias.
4796 The list is circular so that we don't need to use u.weakdef as
4797 well as this list to look at all aliases. */
4798 if (eind->elf.root.type != bfd_link_hash_indirect)
4799 {
4800 struct ppc_link_hash_entry *cur, *add, *next;
4801
4802 add = eind;
4803 do
4804 {
4805 cur = edir->weakref;
4806 if (cur != NULL)
4807 {
4808 do
4809 {
4810 /* We can be called twice for the same symbols.
4811 Don't make multiple loops. */
4812 if (cur == add)
4813 return;
4814 cur = cur->weakref;
4815 } while (cur != edir);
4816 }
4817 next = add->weakref;
4818 if (cur != add)
4819 {
4820 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4821 edir->weakref = add;
4822 }
4823 add = next;
4824 } while (add != NULL && add != eind);
4825 return;
4826 }
4827
4828 /* Copy over any dynamic relocs we may have on the indirect sym. */
4829 if (eind->dyn_relocs != NULL)
4830 {
4831 if (edir->dyn_relocs != NULL)
4832 {
4833 struct elf_dyn_relocs **pp;
4834 struct elf_dyn_relocs *p;
4835
4836 /* Add reloc counts against the indirect sym to the direct sym
4837 list. Merge any entries against the same section. */
4838 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4839 {
4840 struct elf_dyn_relocs *q;
4841
4842 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4843 if (q->sec == p->sec)
4844 {
4845 q->pc_count += p->pc_count;
4846 q->count += p->count;
4847 *pp = p->next;
4848 break;
4849 }
4850 if (q == NULL)
4851 pp = &p->next;
4852 }
4853 *pp = edir->dyn_relocs;
4854 }
4855
4856 edir->dyn_relocs = eind->dyn_relocs;
4857 eind->dyn_relocs = NULL;
4858 }
4859
4860 /* Copy over got entries that we may have already seen to the
4861 symbol which just became indirect. */
4862 if (eind->elf.got.glist != NULL)
4863 {
4864 if (edir->elf.got.glist != NULL)
4865 {
4866 struct got_entry **entp;
4867 struct got_entry *ent;
4868
4869 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4870 {
4871 struct got_entry *dent;
4872
4873 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4874 if (dent->addend == ent->addend
4875 && dent->owner == ent->owner
4876 && dent->tls_type == ent->tls_type)
4877 {
4878 dent->got.refcount += ent->got.refcount;
4879 *entp = ent->next;
4880 break;
4881 }
4882 if (dent == NULL)
4883 entp = &ent->next;
4884 }
4885 *entp = edir->elf.got.glist;
4886 }
4887
4888 edir->elf.got.glist = eind->elf.got.glist;
4889 eind->elf.got.glist = NULL;
4890 }
4891
4892 /* And plt entries. */
4893 move_plt_plist (eind, edir);
4894
4895 if (eind->elf.dynindx != -1)
4896 {
4897 if (edir->elf.dynindx != -1)
4898 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4899 edir->elf.dynstr_index);
4900 edir->elf.dynindx = eind->elf.dynindx;
4901 edir->elf.dynstr_index = eind->elf.dynstr_index;
4902 eind->elf.dynindx = -1;
4903 eind->elf.dynstr_index = 0;
4904 }
4905 }
4906
4907 /* Find the function descriptor hash entry from the given function code
4908 hash entry FH. Link the entries via their OH fields. */
4909
4910 static struct ppc_link_hash_entry *
4911 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4912 {
4913 struct ppc_link_hash_entry *fdh = fh->oh;
4914
4915 if (fdh == NULL)
4916 {
4917 const char *fd_name = fh->elf.root.root.string + 1;
4918
4919 fdh = (struct ppc_link_hash_entry *)
4920 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4921 if (fdh == NULL)
4922 return fdh;
4923
4924 fdh->is_func_descriptor = 1;
4925 fdh->oh = fh;
4926 fh->is_func = 1;
4927 fh->oh = fdh;
4928 }
4929
4930 fdh = ppc_follow_link (fdh);
4931 fdh->is_func_descriptor = 1;
4932 fdh->oh = fh;
4933 return fdh;
4934 }
4935
4936 /* Make a fake function descriptor sym for the undefined code sym FH. */
4937
4938 static struct ppc_link_hash_entry *
4939 make_fdh (struct bfd_link_info *info,
4940 struct ppc_link_hash_entry *fh)
4941 {
4942 bfd *abfd = fh->elf.root.u.undef.abfd;
4943 struct bfd_link_hash_entry *bh = NULL;
4944 struct ppc_link_hash_entry *fdh;
4945 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4946 ? BSF_WEAK
4947 : BSF_GLOBAL);
4948
4949 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4950 fh->elf.root.root.string + 1,
4951 flags, bfd_und_section_ptr, 0,
4952 NULL, FALSE, FALSE, &bh))
4953 return NULL;
4954
4955 fdh = (struct ppc_link_hash_entry *) bh;
4956 fdh->elf.non_elf = 0;
4957 fdh->fake = 1;
4958 fdh->is_func_descriptor = 1;
4959 fdh->oh = fh;
4960 fh->is_func = 1;
4961 fh->oh = fdh;
4962 return fdh;
4963 }
4964
4965 /* Fix function descriptor symbols defined in .opd sections to be
4966 function type. */
4967
4968 static bfd_boolean
4969 ppc64_elf_add_symbol_hook (bfd *ibfd,
4970 struct bfd_link_info *info,
4971 Elf_Internal_Sym *isym,
4972 const char **name,
4973 flagword *flags ATTRIBUTE_UNUSED,
4974 asection **sec,
4975 bfd_vma *value)
4976 {
4977 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4978 && (ibfd->flags & DYNAMIC) == 0
4979 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4980 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4981
4982 if (*sec != NULL
4983 && strcmp ((*sec)->name, ".opd") == 0)
4984 {
4985 asection *code_sec;
4986
4987 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4988 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4989 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4990
4991 /* If the symbol is a function defined in .opd, and the function
4992 code is in a discarded group, let it appear to be undefined. */
4993 if (!bfd_link_relocatable (info)
4994 && (*sec)->reloc_count != 0
4995 && opd_entry_value (*sec, *value, &code_sec, NULL,
4996 FALSE) != (bfd_vma) -1
4997 && discarded_section (code_sec))
4998 {
4999 *sec = bfd_und_section_ptr;
5000 isym->st_shndx = SHN_UNDEF;
5001 }
5002 }
5003 else if (*sec != NULL
5004 && strcmp ((*sec)->name, ".toc") == 0
5005 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
5006 {
5007 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5008 if (htab != NULL)
5009 htab->params->object_in_toc = 1;
5010 }
5011
5012 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5013 {
5014 if (abiversion (ibfd) == 0)
5015 set_abiversion (ibfd, 2);
5016 else if (abiversion (ibfd) == 1)
5017 {
5018 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5019 " for ABI version 1\n"), name);
5020 bfd_set_error (bfd_error_bad_value);
5021 return FALSE;
5022 }
5023 }
5024
5025 return TRUE;
5026 }
5027
5028 /* Merge non-visibility st_other attributes: local entry point. */
5029
5030 static void
5031 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5032 const Elf_Internal_Sym *isym,
5033 bfd_boolean definition,
5034 bfd_boolean dynamic)
5035 {
5036 if (definition && (!dynamic || !h->def_regular))
5037 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5038 | ELF_ST_VISIBILITY (h->other));
5039 }
5040
5041 /* Hook called on merging a symbol. We use this to clear "fake" since
5042 we now have a real symbol. */
5043
5044 static bfd_boolean
5045 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5046 const Elf_Internal_Sym *isym,
5047 asection **psec ATTRIBUTE_UNUSED,
5048 bfd_boolean newdef ATTRIBUTE_UNUSED,
5049 bfd_boolean olddef ATTRIBUTE_UNUSED,
5050 bfd *oldbfd ATTRIBUTE_UNUSED,
5051 const asection *oldsec ATTRIBUTE_UNUSED)
5052 {
5053 ((struct ppc_link_hash_entry *) h)->fake = 0;
5054 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5055 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5056 return TRUE;
5057 }
5058
5059 /* This function makes an old ABI object reference to ".bar" cause the
5060 inclusion of a new ABI object archive that defines "bar".
5061 NAME is a symbol defined in an archive. Return a symbol in the hash
5062 table that might be satisfied by the archive symbols. */
5063
5064 static struct elf_link_hash_entry *
5065 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5066 struct bfd_link_info *info,
5067 const char *name)
5068 {
5069 struct elf_link_hash_entry *h;
5070 char *dot_name;
5071 size_t len;
5072
5073 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5074 if (h != NULL
5075 /* Don't return this sym if it is a fake function descriptor
5076 created by add_symbol_adjust. */
5077 && !((struct ppc_link_hash_entry *) h)->fake)
5078 return h;
5079
5080 if (name[0] == '.')
5081 return h;
5082
5083 len = strlen (name);
5084 dot_name = bfd_alloc (abfd, len + 2);
5085 if (dot_name == NULL)
5086 return (struct elf_link_hash_entry *) 0 - 1;
5087 dot_name[0] = '.';
5088 memcpy (dot_name + 1, name, len + 1);
5089 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5090 bfd_release (abfd, dot_name);
5091 return h;
5092 }
5093
5094 /* This function satisfies all old ABI object references to ".bar" if a
5095 new ABI object defines "bar". Well, at least, undefined dot symbols
5096 are made weak. This stops later archive searches from including an
5097 object if we already have a function descriptor definition. It also
5098 prevents the linker complaining about undefined symbols.
5099 We also check and correct mismatched symbol visibility here. The
5100 most restrictive visibility of the function descriptor and the
5101 function entry symbol is used. */
5102
5103 static bfd_boolean
5104 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5105 {
5106 struct ppc_link_hash_table *htab;
5107 struct ppc_link_hash_entry *fdh;
5108
5109 if (eh->elf.root.type == bfd_link_hash_warning)
5110 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5111
5112 if (eh->elf.root.type == bfd_link_hash_indirect)
5113 return TRUE;
5114
5115 if (eh->elf.root.root.string[0] != '.')
5116 abort ();
5117
5118 htab = ppc_hash_table (info);
5119 if (htab == NULL)
5120 return FALSE;
5121
5122 fdh = lookup_fdh (eh, htab);
5123 if (fdh == NULL
5124 && !bfd_link_relocatable (info)
5125 && (eh->elf.root.type == bfd_link_hash_undefined
5126 || eh->elf.root.type == bfd_link_hash_undefweak)
5127 && eh->elf.ref_regular)
5128 {
5129 /* Make an undefined function descriptor sym, in order to
5130 pull in an --as-needed shared lib. Archives are handled
5131 elsewhere. */
5132 fdh = make_fdh (info, eh);
5133 if (fdh == NULL)
5134 return FALSE;
5135 }
5136
5137 if (fdh != NULL)
5138 {
5139 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5140 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5141
5142 /* Make both descriptor and entry symbol have the most
5143 constraining visibility of either symbol. */
5144 if (entry_vis < descr_vis)
5145 fdh->elf.other += entry_vis - descr_vis;
5146 else if (entry_vis > descr_vis)
5147 eh->elf.other += descr_vis - entry_vis;
5148
5149 /* Propagate reference flags from entry symbol to function
5150 descriptor symbol. */
5151 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5152 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5153 fdh->elf.ref_regular |= eh->elf.ref_regular;
5154 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5155
5156 if (!fdh->elf.forced_local
5157 && fdh->elf.dynindx == -1
5158 && fdh->elf.versioned != versioned_hidden
5159 && (bfd_link_dll (info)
5160 || fdh->elf.def_dynamic
5161 || fdh->elf.ref_dynamic)
5162 && (eh->elf.ref_regular
5163 || eh->elf.def_regular))
5164 {
5165 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5166 return FALSE;
5167 }
5168 }
5169
5170 return TRUE;
5171 }
5172
5173 /* Set up opd section info and abiversion for IBFD, and process list
5174 of dot-symbols we made in link_hash_newfunc. */
5175
5176 static bfd_boolean
5177 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5178 {
5179 struct ppc_link_hash_table *htab;
5180 struct ppc_link_hash_entry **p, *eh;
5181 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5182
5183 if (opd != NULL && opd->size != 0)
5184 {
5185 if (abiversion (ibfd) == 0)
5186 set_abiversion (ibfd, 1);
5187 else if (abiversion (ibfd) >= 2)
5188 {
5189 /* xgettext:c-format */
5190 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5191 " version %d\n"),
5192 ibfd, abiversion (ibfd));
5193 bfd_set_error (bfd_error_bad_value);
5194 return FALSE;
5195 }
5196
5197 if ((ibfd->flags & DYNAMIC) == 0
5198 && (opd->flags & SEC_RELOC) != 0
5199 && opd->reloc_count != 0
5200 && !bfd_is_abs_section (opd->output_section))
5201 {
5202 /* Garbage collection needs some extra help with .opd sections.
5203 We don't want to necessarily keep everything referenced by
5204 relocs in .opd, as that would keep all functions. Instead,
5205 if we reference an .opd symbol (a function descriptor), we
5206 want to keep the function code symbol's section. This is
5207 easy for global symbols, but for local syms we need to keep
5208 information about the associated function section. */
5209 bfd_size_type amt;
5210 asection **opd_sym_map;
5211
5212 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5213 opd_sym_map = bfd_zalloc (ibfd, amt);
5214 if (opd_sym_map == NULL)
5215 return FALSE;
5216 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5217 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5218 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5219 }
5220 }
5221
5222 if (!is_ppc64_elf (info->output_bfd))
5223 return TRUE;
5224 htab = ppc_hash_table (info);
5225 if (htab == NULL)
5226 return FALSE;
5227
5228 /* For input files without an explicit abiversion in e_flags
5229 we should have flagged any with symbol st_other bits set
5230 as ELFv1 and above flagged those with .opd as ELFv2.
5231 Set the output abiversion if not yet set, and for any input
5232 still ambiguous, take its abiversion from the output.
5233 Differences in ABI are reported later. */
5234 if (abiversion (info->output_bfd) == 0)
5235 set_abiversion (info->output_bfd, abiversion (ibfd));
5236 else if (abiversion (ibfd) == 0)
5237 set_abiversion (ibfd, abiversion (info->output_bfd));
5238
5239 p = &htab->dot_syms;
5240 while ((eh = *p) != NULL)
5241 {
5242 *p = NULL;
5243 if (&eh->elf == htab->elf.hgot)
5244 ;
5245 else if (htab->elf.hgot == NULL
5246 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5247 htab->elf.hgot = &eh->elf;
5248 else if (abiversion (ibfd) <= 1)
5249 {
5250 htab->need_func_desc_adj = 1;
5251 if (!add_symbol_adjust (eh, info))
5252 return FALSE;
5253 }
5254 p = &eh->u.next_dot_sym;
5255 }
5256 return TRUE;
5257 }
5258
5259 /* Undo hash table changes when an --as-needed input file is determined
5260 not to be needed. */
5261
5262 static bfd_boolean
5263 ppc64_elf_notice_as_needed (bfd *ibfd,
5264 struct bfd_link_info *info,
5265 enum notice_asneeded_action act)
5266 {
5267 if (act == notice_not_needed)
5268 {
5269 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5270
5271 if (htab == NULL)
5272 return FALSE;
5273
5274 htab->dot_syms = NULL;
5275 }
5276 return _bfd_elf_notice_as_needed (ibfd, info, act);
5277 }
5278
5279 /* If --just-symbols against a final linked binary, then assume we need
5280 toc adjusting stubs when calling functions defined there. */
5281
5282 static void
5283 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5284 {
5285 if ((sec->flags & SEC_CODE) != 0
5286 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5287 && is_ppc64_elf (sec->owner))
5288 {
5289 if (abiversion (sec->owner) >= 2
5290 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5291 sec->has_toc_reloc = 1;
5292 }
5293 _bfd_elf_link_just_syms (sec, info);
5294 }
5295
5296 static struct plt_entry **
5297 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5298 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5299 {
5300 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5301 struct plt_entry **local_plt;
5302 unsigned char *local_got_tls_masks;
5303
5304 if (local_got_ents == NULL)
5305 {
5306 bfd_size_type size = symtab_hdr->sh_info;
5307
5308 size *= (sizeof (*local_got_ents)
5309 + sizeof (*local_plt)
5310 + sizeof (*local_got_tls_masks));
5311 local_got_ents = bfd_zalloc (abfd, size);
5312 if (local_got_ents == NULL)
5313 return NULL;
5314 elf_local_got_ents (abfd) = local_got_ents;
5315 }
5316
5317 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5318 {
5319 struct got_entry *ent;
5320
5321 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5322 if (ent->addend == r_addend
5323 && ent->owner == abfd
5324 && ent->tls_type == tls_type)
5325 break;
5326 if (ent == NULL)
5327 {
5328 bfd_size_type amt = sizeof (*ent);
5329 ent = bfd_alloc (abfd, amt);
5330 if (ent == NULL)
5331 return FALSE;
5332 ent->next = local_got_ents[r_symndx];
5333 ent->addend = r_addend;
5334 ent->owner = abfd;
5335 ent->tls_type = tls_type;
5336 ent->is_indirect = FALSE;
5337 ent->got.refcount = 0;
5338 local_got_ents[r_symndx] = ent;
5339 }
5340 ent->got.refcount += 1;
5341 }
5342
5343 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5344 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5345 local_got_tls_masks[r_symndx] |= tls_type;
5346
5347 return local_plt + r_symndx;
5348 }
5349
5350 static bfd_boolean
5351 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5352 {
5353 struct plt_entry *ent;
5354
5355 for (ent = *plist; ent != NULL; ent = ent->next)
5356 if (ent->addend == addend)
5357 break;
5358 if (ent == NULL)
5359 {
5360 bfd_size_type amt = sizeof (*ent);
5361 ent = bfd_alloc (abfd, amt);
5362 if (ent == NULL)
5363 return FALSE;
5364 ent->next = *plist;
5365 ent->addend = addend;
5366 ent->plt.refcount = 0;
5367 *plist = ent;
5368 }
5369 ent->plt.refcount += 1;
5370 return TRUE;
5371 }
5372
5373 static bfd_boolean
5374 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5375 {
5376 return (r_type == R_PPC64_REL24
5377 || r_type == R_PPC64_REL14
5378 || r_type == R_PPC64_REL14_BRTAKEN
5379 || r_type == R_PPC64_REL14_BRNTAKEN
5380 || r_type == R_PPC64_ADDR24
5381 || r_type == R_PPC64_ADDR14
5382 || r_type == R_PPC64_ADDR14_BRTAKEN
5383 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5384 }
5385
5386 /* Look through the relocs for a section during the first phase, and
5387 calculate needed space in the global offset table, procedure
5388 linkage table, and dynamic reloc sections. */
5389
5390 static bfd_boolean
5391 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5392 asection *sec, const Elf_Internal_Rela *relocs)
5393 {
5394 struct ppc_link_hash_table *htab;
5395 Elf_Internal_Shdr *symtab_hdr;
5396 struct elf_link_hash_entry **sym_hashes;
5397 const Elf_Internal_Rela *rel;
5398 const Elf_Internal_Rela *rel_end;
5399 asection *sreloc;
5400 asection **opd_sym_map;
5401 struct elf_link_hash_entry *tga, *dottga;
5402
5403 if (bfd_link_relocatable (info))
5404 return TRUE;
5405
5406 /* Don't do anything special with non-loaded, non-alloced sections.
5407 In particular, any relocs in such sections should not affect GOT
5408 and PLT reference counting (ie. we don't allow them to create GOT
5409 or PLT entries), there's no possibility or desire to optimize TLS
5410 relocs, and there's not much point in propagating relocs to shared
5411 libs that the dynamic linker won't relocate. */
5412 if ((sec->flags & SEC_ALLOC) == 0)
5413 return TRUE;
5414
5415 BFD_ASSERT (is_ppc64_elf (abfd));
5416
5417 htab = ppc_hash_table (info);
5418 if (htab == NULL)
5419 return FALSE;
5420
5421 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5422 FALSE, FALSE, TRUE);
5423 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5424 FALSE, FALSE, TRUE);
5425 symtab_hdr = &elf_symtab_hdr (abfd);
5426 sym_hashes = elf_sym_hashes (abfd);
5427 sreloc = NULL;
5428 opd_sym_map = NULL;
5429 if (ppc64_elf_section_data (sec) != NULL
5430 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5431 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5432
5433 rel_end = relocs + sec->reloc_count;
5434 for (rel = relocs; rel < rel_end; rel++)
5435 {
5436 unsigned long r_symndx;
5437 struct elf_link_hash_entry *h;
5438 enum elf_ppc64_reloc_type r_type;
5439 int tls_type;
5440 struct _ppc64_elf_section_data *ppc64_sec;
5441 struct plt_entry **ifunc, **plt_list;
5442
5443 r_symndx = ELF64_R_SYM (rel->r_info);
5444 if (r_symndx < symtab_hdr->sh_info)
5445 h = NULL;
5446 else
5447 {
5448 struct ppc_link_hash_entry *eh;
5449
5450 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5451 h = elf_follow_link (h);
5452 eh = (struct ppc_link_hash_entry *) h;
5453
5454 /* PR15323, ref flags aren't set for references in the same
5455 object. */
5456 h->root.non_ir_ref_regular = 1;
5457 if (eh->is_func && eh->oh != NULL)
5458 eh->oh->elf.root.non_ir_ref_regular = 1;
5459
5460 if (h == htab->elf.hgot)
5461 sec->has_toc_reloc = 1;
5462 }
5463
5464 tls_type = 0;
5465 ifunc = NULL;
5466 if (h != NULL)
5467 {
5468 if (h->type == STT_GNU_IFUNC)
5469 {
5470 h->needs_plt = 1;
5471 ifunc = &h->plt.plist;
5472 }
5473 }
5474 else
5475 {
5476 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5477 abfd, r_symndx);
5478 if (isym == NULL)
5479 return FALSE;
5480
5481 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5482 {
5483 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5484 rel->r_addend, PLT_IFUNC);
5485 if (ifunc == NULL)
5486 return FALSE;
5487 }
5488 }
5489
5490 r_type = ELF64_R_TYPE (rel->r_info);
5491 switch (r_type)
5492 {
5493 case R_PPC64_TLSGD:
5494 case R_PPC64_TLSLD:
5495 /* These special tls relocs tie a call to __tls_get_addr with
5496 its parameter symbol. */
5497 break;
5498
5499 case R_PPC64_GOT_TLSLD16:
5500 case R_PPC64_GOT_TLSLD16_LO:
5501 case R_PPC64_GOT_TLSLD16_HI:
5502 case R_PPC64_GOT_TLSLD16_HA:
5503 tls_type = TLS_TLS | TLS_LD;
5504 goto dogottls;
5505
5506 case R_PPC64_GOT_TLSGD16:
5507 case R_PPC64_GOT_TLSGD16_LO:
5508 case R_PPC64_GOT_TLSGD16_HI:
5509 case R_PPC64_GOT_TLSGD16_HA:
5510 tls_type = TLS_TLS | TLS_GD;
5511 goto dogottls;
5512
5513 case R_PPC64_GOT_TPREL16_DS:
5514 case R_PPC64_GOT_TPREL16_LO_DS:
5515 case R_PPC64_GOT_TPREL16_HI:
5516 case R_PPC64_GOT_TPREL16_HA:
5517 if (bfd_link_dll (info))
5518 info->flags |= DF_STATIC_TLS;
5519 tls_type = TLS_TLS | TLS_TPREL;
5520 goto dogottls;
5521
5522 case R_PPC64_GOT_DTPREL16_DS:
5523 case R_PPC64_GOT_DTPREL16_LO_DS:
5524 case R_PPC64_GOT_DTPREL16_HI:
5525 case R_PPC64_GOT_DTPREL16_HA:
5526 tls_type = TLS_TLS | TLS_DTPREL;
5527 dogottls:
5528 sec->has_tls_reloc = 1;
5529 /* Fall through */
5530
5531 case R_PPC64_GOT16:
5532 case R_PPC64_GOT16_DS:
5533 case R_PPC64_GOT16_HA:
5534 case R_PPC64_GOT16_HI:
5535 case R_PPC64_GOT16_LO:
5536 case R_PPC64_GOT16_LO_DS:
5537 /* This symbol requires a global offset table entry. */
5538 sec->has_toc_reloc = 1;
5539 if (r_type == R_PPC64_GOT_TLSLD16
5540 || r_type == R_PPC64_GOT_TLSGD16
5541 || r_type == R_PPC64_GOT_TPREL16_DS
5542 || r_type == R_PPC64_GOT_DTPREL16_DS
5543 || r_type == R_PPC64_GOT16
5544 || r_type == R_PPC64_GOT16_DS)
5545 {
5546 htab->do_multi_toc = 1;
5547 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5548 }
5549
5550 if (ppc64_elf_tdata (abfd)->got == NULL
5551 && !create_got_section (abfd, info))
5552 return FALSE;
5553
5554 if (h != NULL)
5555 {
5556 struct ppc_link_hash_entry *eh;
5557 struct got_entry *ent;
5558
5559 eh = (struct ppc_link_hash_entry *) h;
5560 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5561 if (ent->addend == rel->r_addend
5562 && ent->owner == abfd
5563 && ent->tls_type == tls_type)
5564 break;
5565 if (ent == NULL)
5566 {
5567 bfd_size_type amt = sizeof (*ent);
5568 ent = bfd_alloc (abfd, amt);
5569 if (ent == NULL)
5570 return FALSE;
5571 ent->next = eh->elf.got.glist;
5572 ent->addend = rel->r_addend;
5573 ent->owner = abfd;
5574 ent->tls_type = tls_type;
5575 ent->is_indirect = FALSE;
5576 ent->got.refcount = 0;
5577 eh->elf.got.glist = ent;
5578 }
5579 ent->got.refcount += 1;
5580 eh->tls_mask |= tls_type;
5581 }
5582 else
5583 /* This is a global offset table entry for a local symbol. */
5584 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5585 rel->r_addend, tls_type))
5586 return FALSE;
5587
5588 /* We may also need a plt entry if the symbol turns out to be
5589 an ifunc. */
5590 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5591 {
5592 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5593 return FALSE;
5594 }
5595 break;
5596
5597 case R_PPC64_PLT16_HA:
5598 case R_PPC64_PLT16_HI:
5599 case R_PPC64_PLT16_LO:
5600 case R_PPC64_PLT32:
5601 case R_PPC64_PLT64:
5602 /* This symbol requires a procedure linkage table entry. */
5603 plt_list = ifunc;
5604 if (h != NULL)
5605 {
5606 h->needs_plt = 1;
5607 if (h->root.root.string[0] == '.'
5608 && h->root.root.string[1] != '\0')
5609 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5610 plt_list = &h->plt.plist;
5611 }
5612 if (plt_list == NULL)
5613 {
5614 /* It does not make sense to have a procedure linkage
5615 table entry for a non-ifunc local symbol. */
5616 info->callbacks->einfo
5617 /* xgettext:c-format */
5618 (_("%H: %s reloc against local symbol\n"),
5619 abfd, sec, rel->r_offset,
5620 ppc64_elf_howto_table[r_type]->name);
5621 bfd_set_error (bfd_error_bad_value);
5622 return FALSE;
5623 }
5624 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5625 return FALSE;
5626 break;
5627
5628 /* The following relocations don't need to propagate the
5629 relocation if linking a shared object since they are
5630 section relative. */
5631 case R_PPC64_SECTOFF:
5632 case R_PPC64_SECTOFF_LO:
5633 case R_PPC64_SECTOFF_HI:
5634 case R_PPC64_SECTOFF_HA:
5635 case R_PPC64_SECTOFF_DS:
5636 case R_PPC64_SECTOFF_LO_DS:
5637 case R_PPC64_DTPREL16:
5638 case R_PPC64_DTPREL16_LO:
5639 case R_PPC64_DTPREL16_HI:
5640 case R_PPC64_DTPREL16_HA:
5641 case R_PPC64_DTPREL16_DS:
5642 case R_PPC64_DTPREL16_LO_DS:
5643 case R_PPC64_DTPREL16_HIGH:
5644 case R_PPC64_DTPREL16_HIGHA:
5645 case R_PPC64_DTPREL16_HIGHER:
5646 case R_PPC64_DTPREL16_HIGHERA:
5647 case R_PPC64_DTPREL16_HIGHEST:
5648 case R_PPC64_DTPREL16_HIGHESTA:
5649 break;
5650
5651 /* Nor do these. */
5652 case R_PPC64_REL16:
5653 case R_PPC64_REL16_LO:
5654 case R_PPC64_REL16_HI:
5655 case R_PPC64_REL16_HA:
5656 case R_PPC64_REL16DX_HA:
5657 break;
5658
5659 /* Not supported as a dynamic relocation. */
5660 case R_PPC64_ADDR64_LOCAL:
5661 if (bfd_link_pic (info))
5662 {
5663 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5664 ppc_howto_init ();
5665 /* xgettext:c-format */
5666 info->callbacks->einfo (_("%H: %s reloc unsupported "
5667 "in shared libraries and PIEs.\n"),
5668 abfd, sec, rel->r_offset,
5669 ppc64_elf_howto_table[r_type]->name);
5670 bfd_set_error (bfd_error_bad_value);
5671 return FALSE;
5672 }
5673 break;
5674
5675 case R_PPC64_TOC16:
5676 case R_PPC64_TOC16_DS:
5677 htab->do_multi_toc = 1;
5678 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5679 /* Fall through. */
5680 case R_PPC64_TOC16_LO:
5681 case R_PPC64_TOC16_HI:
5682 case R_PPC64_TOC16_HA:
5683 case R_PPC64_TOC16_LO_DS:
5684 sec->has_toc_reloc = 1;
5685 break;
5686
5687 /* Marker reloc. */
5688 case R_PPC64_ENTRY:
5689 break;
5690
5691 /* This relocation describes the C++ object vtable hierarchy.
5692 Reconstruct it for later use during GC. */
5693 case R_PPC64_GNU_VTINHERIT:
5694 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5695 return FALSE;
5696 break;
5697
5698 /* This relocation describes which C++ vtable entries are actually
5699 used. Record for later use during GC. */
5700 case R_PPC64_GNU_VTENTRY:
5701 BFD_ASSERT (h != NULL);
5702 if (h != NULL
5703 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5704 return FALSE;
5705 break;
5706
5707 case R_PPC64_REL14:
5708 case R_PPC64_REL14_BRTAKEN:
5709 case R_PPC64_REL14_BRNTAKEN:
5710 {
5711 asection *dest = NULL;
5712
5713 /* Heuristic: If jumping outside our section, chances are
5714 we are going to need a stub. */
5715 if (h != NULL)
5716 {
5717 /* If the sym is weak it may be overridden later, so
5718 don't assume we know where a weak sym lives. */
5719 if (h->root.type == bfd_link_hash_defined)
5720 dest = h->root.u.def.section;
5721 }
5722 else
5723 {
5724 Elf_Internal_Sym *isym;
5725
5726 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5727 abfd, r_symndx);
5728 if (isym == NULL)
5729 return FALSE;
5730
5731 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5732 }
5733
5734 if (dest != sec)
5735 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5736 }
5737 /* Fall through. */
5738
5739 case R_PPC64_REL24:
5740 plt_list = ifunc;
5741 if (h != NULL)
5742 {
5743 h->needs_plt = 1;
5744 if (h->root.root.string[0] == '.'
5745 && h->root.root.string[1] != '\0')
5746 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5747
5748 if (h == tga || h == dottga)
5749 {
5750 sec->has_tls_reloc = 1;
5751 if (rel != relocs
5752 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5753 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5754 /* We have a new-style __tls_get_addr call with
5755 a marker reloc. */
5756 ;
5757 else
5758 /* Mark this section as having an old-style call. */
5759 sec->has_tls_get_addr_call = 1;
5760 }
5761 plt_list = &h->plt.plist;
5762 }
5763
5764 /* We may need a .plt entry if the function this reloc
5765 refers to is in a shared lib. */
5766 if (plt_list
5767 && !update_plt_info (abfd, plt_list, rel->r_addend))
5768 return FALSE;
5769 break;
5770
5771 case R_PPC64_ADDR14:
5772 case R_PPC64_ADDR14_BRNTAKEN:
5773 case R_PPC64_ADDR14_BRTAKEN:
5774 case R_PPC64_ADDR24:
5775 goto dodyn;
5776
5777 case R_PPC64_TPREL64:
5778 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5779 if (bfd_link_dll (info))
5780 info->flags |= DF_STATIC_TLS;
5781 goto dotlstoc;
5782
5783 case R_PPC64_DTPMOD64:
5784 if (rel + 1 < rel_end
5785 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5786 && rel[1].r_offset == rel->r_offset + 8)
5787 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5788 else
5789 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5790 goto dotlstoc;
5791
5792 case R_PPC64_DTPREL64:
5793 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5794 if (rel != relocs
5795 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5796 && rel[-1].r_offset == rel->r_offset - 8)
5797 /* This is the second reloc of a dtpmod, dtprel pair.
5798 Don't mark with TLS_DTPREL. */
5799 goto dodyn;
5800
5801 dotlstoc:
5802 sec->has_tls_reloc = 1;
5803 if (h != NULL)
5804 {
5805 struct ppc_link_hash_entry *eh;
5806 eh = (struct ppc_link_hash_entry *) h;
5807 eh->tls_mask |= tls_type;
5808 }
5809 else
5810 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5811 rel->r_addend, tls_type))
5812 return FALSE;
5813
5814 ppc64_sec = ppc64_elf_section_data (sec);
5815 if (ppc64_sec->sec_type != sec_toc)
5816 {
5817 bfd_size_type amt;
5818
5819 /* One extra to simplify get_tls_mask. */
5820 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5821 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5822 if (ppc64_sec->u.toc.symndx == NULL)
5823 return FALSE;
5824 amt = sec->size * sizeof (bfd_vma) / 8;
5825 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5826 if (ppc64_sec->u.toc.add == NULL)
5827 return FALSE;
5828 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5829 ppc64_sec->sec_type = sec_toc;
5830 }
5831 BFD_ASSERT (rel->r_offset % 8 == 0);
5832 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5833 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5834
5835 /* Mark the second slot of a GD or LD entry.
5836 -1 to indicate GD and -2 to indicate LD. */
5837 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5838 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5839 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5840 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5841 goto dodyn;
5842
5843 case R_PPC64_TPREL16:
5844 case R_PPC64_TPREL16_LO:
5845 case R_PPC64_TPREL16_HI:
5846 case R_PPC64_TPREL16_HA:
5847 case R_PPC64_TPREL16_DS:
5848 case R_PPC64_TPREL16_LO_DS:
5849 case R_PPC64_TPREL16_HIGH:
5850 case R_PPC64_TPREL16_HIGHA:
5851 case R_PPC64_TPREL16_HIGHER:
5852 case R_PPC64_TPREL16_HIGHERA:
5853 case R_PPC64_TPREL16_HIGHEST:
5854 case R_PPC64_TPREL16_HIGHESTA:
5855 if (bfd_link_dll (info))
5856 info->flags |= DF_STATIC_TLS;
5857 goto dodyn;
5858
5859 case R_PPC64_ADDR64:
5860 if (opd_sym_map != NULL
5861 && rel + 1 < rel_end
5862 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5863 {
5864 if (h != NULL)
5865 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5866 else
5867 {
5868 asection *s;
5869 Elf_Internal_Sym *isym;
5870
5871 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5872 abfd, r_symndx);
5873 if (isym == NULL)
5874 return FALSE;
5875
5876 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5877 if (s != NULL && s != sec)
5878 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5879 }
5880 }
5881 /* Fall through. */
5882
5883 case R_PPC64_ADDR16:
5884 case R_PPC64_ADDR16_DS:
5885 case R_PPC64_ADDR16_HA:
5886 case R_PPC64_ADDR16_HI:
5887 case R_PPC64_ADDR16_HIGH:
5888 case R_PPC64_ADDR16_HIGHA:
5889 case R_PPC64_ADDR16_HIGHER:
5890 case R_PPC64_ADDR16_HIGHERA:
5891 case R_PPC64_ADDR16_HIGHEST:
5892 case R_PPC64_ADDR16_HIGHESTA:
5893 case R_PPC64_ADDR16_LO:
5894 case R_PPC64_ADDR16_LO_DS:
5895 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5896 && rel->r_addend == 0)
5897 {
5898 /* We may need a .plt entry if this reloc refers to a
5899 function in a shared lib. */
5900 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5901 return FALSE;
5902 h->pointer_equality_needed = 1;
5903 }
5904 /* Fall through. */
5905
5906 case R_PPC64_REL30:
5907 case R_PPC64_REL32:
5908 case R_PPC64_REL64:
5909 case R_PPC64_ADDR32:
5910 case R_PPC64_UADDR16:
5911 case R_PPC64_UADDR32:
5912 case R_PPC64_UADDR64:
5913 case R_PPC64_TOC:
5914 if (h != NULL && !bfd_link_pic (info))
5915 /* We may need a copy reloc. */
5916 h->non_got_ref = 1;
5917
5918 /* Don't propagate .opd relocs. */
5919 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5920 break;
5921
5922 /* If we are creating a shared library, and this is a reloc
5923 against a global symbol, or a non PC relative reloc
5924 against a local symbol, then we need to copy the reloc
5925 into the shared library. However, if we are linking with
5926 -Bsymbolic, we do not need to copy a reloc against a
5927 global symbol which is defined in an object we are
5928 including in the link (i.e., DEF_REGULAR is set). At
5929 this point we have not seen all the input files, so it is
5930 possible that DEF_REGULAR is not set now but will be set
5931 later (it is never cleared). In case of a weak definition,
5932 DEF_REGULAR may be cleared later by a strong definition in
5933 a shared library. We account for that possibility below by
5934 storing information in the dyn_relocs field of the hash
5935 table entry. A similar situation occurs when creating
5936 shared libraries and symbol visibility changes render the
5937 symbol local.
5938
5939 If on the other hand, we are creating an executable, we
5940 may need to keep relocations for symbols satisfied by a
5941 dynamic library if we manage to avoid copy relocs for the
5942 symbol. */
5943 dodyn:
5944 if ((bfd_link_pic (info)
5945 && (must_be_dyn_reloc (info, r_type)
5946 || (h != NULL
5947 && (!SYMBOLIC_BIND (info, h)
5948 || h->root.type == bfd_link_hash_defweak
5949 || !h->def_regular))))
5950 || (ELIMINATE_COPY_RELOCS
5951 && !bfd_link_pic (info)
5952 && h != NULL
5953 && (h->root.type == bfd_link_hash_defweak
5954 || !h->def_regular))
5955 || (!bfd_link_pic (info)
5956 && ifunc != NULL))
5957 {
5958 /* We must copy these reloc types into the output file.
5959 Create a reloc section in dynobj and make room for
5960 this reloc. */
5961 if (sreloc == NULL)
5962 {
5963 sreloc = _bfd_elf_make_dynamic_reloc_section
5964 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5965
5966 if (sreloc == NULL)
5967 return FALSE;
5968 }
5969
5970 /* If this is a global symbol, we count the number of
5971 relocations we need for this symbol. */
5972 if (h != NULL)
5973 {
5974 struct elf_dyn_relocs *p;
5975 struct elf_dyn_relocs **head;
5976
5977 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5978 p = *head;
5979 if (p == NULL || p->sec != sec)
5980 {
5981 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5982 if (p == NULL)
5983 return FALSE;
5984 p->next = *head;
5985 *head = p;
5986 p->sec = sec;
5987 p->count = 0;
5988 p->pc_count = 0;
5989 }
5990 p->count += 1;
5991 if (!must_be_dyn_reloc (info, r_type))
5992 p->pc_count += 1;
5993 }
5994 else
5995 {
5996 /* Track dynamic relocs needed for local syms too.
5997 We really need local syms available to do this
5998 easily. Oh well. */
5999 struct ppc_dyn_relocs *p;
6000 struct ppc_dyn_relocs **head;
6001 bfd_boolean is_ifunc;
6002 asection *s;
6003 void *vpp;
6004 Elf_Internal_Sym *isym;
6005
6006 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6007 abfd, r_symndx);
6008 if (isym == NULL)
6009 return FALSE;
6010
6011 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6012 if (s == NULL)
6013 s = sec;
6014
6015 vpp = &elf_section_data (s)->local_dynrel;
6016 head = (struct ppc_dyn_relocs **) vpp;
6017 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6018 p = *head;
6019 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6020 p = p->next;
6021 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6022 {
6023 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6024 if (p == NULL)
6025 return FALSE;
6026 p->next = *head;
6027 *head = p;
6028 p->sec = sec;
6029 p->ifunc = is_ifunc;
6030 p->count = 0;
6031 }
6032 p->count += 1;
6033 }
6034 }
6035 break;
6036
6037 default:
6038 break;
6039 }
6040 }
6041
6042 return TRUE;
6043 }
6044
6045 /* Merge backend specific data from an object file to the output
6046 object file when linking. */
6047
6048 static bfd_boolean
6049 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6050 {
6051 bfd *obfd = info->output_bfd;
6052 unsigned long iflags, oflags;
6053
6054 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6055 return TRUE;
6056
6057 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6058 return TRUE;
6059
6060 if (!_bfd_generic_verify_endian_match (ibfd, info))
6061 return FALSE;
6062
6063 iflags = elf_elfheader (ibfd)->e_flags;
6064 oflags = elf_elfheader (obfd)->e_flags;
6065
6066 if (iflags & ~EF_PPC64_ABI)
6067 {
6068 _bfd_error_handler
6069 /* xgettext:c-format */
6070 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6071 bfd_set_error (bfd_error_bad_value);
6072 return FALSE;
6073 }
6074 else if (iflags != oflags && iflags != 0)
6075 {
6076 _bfd_error_handler
6077 /* xgettext:c-format */
6078 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6079 ibfd, iflags, oflags);
6080 bfd_set_error (bfd_error_bad_value);
6081 return FALSE;
6082 }
6083
6084 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6085
6086 /* Merge Tag_compatibility attributes and any common GNU ones. */
6087 _bfd_elf_merge_object_attributes (ibfd, info);
6088
6089 return TRUE;
6090 }
6091
6092 static bfd_boolean
6093 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6094 {
6095 /* Print normal ELF private data. */
6096 _bfd_elf_print_private_bfd_data (abfd, ptr);
6097
6098 if (elf_elfheader (abfd)->e_flags != 0)
6099 {
6100 FILE *file = ptr;
6101
6102 fprintf (file, _("private flags = 0x%lx:"),
6103 elf_elfheader (abfd)->e_flags);
6104
6105 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6106 fprintf (file, _(" [abiv%ld]"),
6107 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6108 fputc ('\n', file);
6109 }
6110
6111 return TRUE;
6112 }
6113
6114 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6115 of the code entry point, and its section, which must be in the same
6116 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6117
6118 static bfd_vma
6119 opd_entry_value (asection *opd_sec,
6120 bfd_vma offset,
6121 asection **code_sec,
6122 bfd_vma *code_off,
6123 bfd_boolean in_code_sec)
6124 {
6125 bfd *opd_bfd = opd_sec->owner;
6126 Elf_Internal_Rela *relocs;
6127 Elf_Internal_Rela *lo, *hi, *look;
6128 bfd_vma val;
6129
6130 /* No relocs implies we are linking a --just-symbols object, or looking
6131 at a final linked executable with addr2line or somesuch. */
6132 if (opd_sec->reloc_count == 0)
6133 {
6134 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6135
6136 if (contents == NULL)
6137 {
6138 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6139 return (bfd_vma) -1;
6140 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6141 }
6142
6143 /* PR 17512: file: 64b9dfbb. */
6144 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6145 return (bfd_vma) -1;
6146
6147 val = bfd_get_64 (opd_bfd, contents + offset);
6148 if (code_sec != NULL)
6149 {
6150 asection *sec, *likely = NULL;
6151
6152 if (in_code_sec)
6153 {
6154 sec = *code_sec;
6155 if (sec->vma <= val
6156 && val < sec->vma + sec->size)
6157 likely = sec;
6158 else
6159 val = -1;
6160 }
6161 else
6162 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6163 if (sec->vma <= val
6164 && (sec->flags & SEC_LOAD) != 0
6165 && (sec->flags & SEC_ALLOC) != 0)
6166 likely = sec;
6167 if (likely != NULL)
6168 {
6169 *code_sec = likely;
6170 if (code_off != NULL)
6171 *code_off = val - likely->vma;
6172 }
6173 }
6174 return val;
6175 }
6176
6177 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6178
6179 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6180 if (relocs == NULL)
6181 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6182 /* PR 17512: file: df8e1fd6. */
6183 if (relocs == NULL)
6184 return (bfd_vma) -1;
6185
6186 /* Go find the opd reloc at the sym address. */
6187 lo = relocs;
6188 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6189 val = (bfd_vma) -1;
6190 while (lo < hi)
6191 {
6192 look = lo + (hi - lo) / 2;
6193 if (look->r_offset < offset)
6194 lo = look + 1;
6195 else if (look->r_offset > offset)
6196 hi = look;
6197 else
6198 {
6199 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6200
6201 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6202 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6203 {
6204 unsigned long symndx = ELF64_R_SYM (look->r_info);
6205 asection *sec = NULL;
6206
6207 if (symndx >= symtab_hdr->sh_info
6208 && elf_sym_hashes (opd_bfd) != NULL)
6209 {
6210 struct elf_link_hash_entry **sym_hashes;
6211 struct elf_link_hash_entry *rh;
6212
6213 sym_hashes = elf_sym_hashes (opd_bfd);
6214 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6215 if (rh != NULL)
6216 {
6217 rh = elf_follow_link (rh);
6218 if (rh->root.type != bfd_link_hash_defined
6219 && rh->root.type != bfd_link_hash_defweak)
6220 break;
6221 if (rh->root.u.def.section->owner == opd_bfd)
6222 {
6223 val = rh->root.u.def.value;
6224 sec = rh->root.u.def.section;
6225 }
6226 }
6227 }
6228
6229 if (sec == NULL)
6230 {
6231 Elf_Internal_Sym *sym;
6232
6233 if (symndx < symtab_hdr->sh_info)
6234 {
6235 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6236 if (sym == NULL)
6237 {
6238 size_t symcnt = symtab_hdr->sh_info;
6239 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6240 symcnt, 0,
6241 NULL, NULL, NULL);
6242 if (sym == NULL)
6243 break;
6244 symtab_hdr->contents = (bfd_byte *) sym;
6245 }
6246 sym += symndx;
6247 }
6248 else
6249 {
6250 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6251 1, symndx,
6252 NULL, NULL, NULL);
6253 if (sym == NULL)
6254 break;
6255 }
6256 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6257 if (sec == NULL)
6258 break;
6259 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6260 val = sym->st_value;
6261 }
6262
6263 val += look->r_addend;
6264 if (code_off != NULL)
6265 *code_off = val;
6266 if (code_sec != NULL)
6267 {
6268 if (in_code_sec && *code_sec != sec)
6269 return -1;
6270 else
6271 *code_sec = sec;
6272 }
6273 if (sec->output_section != NULL)
6274 val += sec->output_section->vma + sec->output_offset;
6275 }
6276 break;
6277 }
6278 }
6279
6280 return val;
6281 }
6282
6283 /* If the ELF symbol SYM might be a function in SEC, return the
6284 function size and set *CODE_OFF to the function's entry point,
6285 otherwise return zero. */
6286
6287 static bfd_size_type
6288 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6289 bfd_vma *code_off)
6290 {
6291 bfd_size_type size;
6292
6293 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6294 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6295 return 0;
6296
6297 size = 0;
6298 if (!(sym->flags & BSF_SYNTHETIC))
6299 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6300
6301 if (strcmp (sym->section->name, ".opd") == 0)
6302 {
6303 struct _opd_sec_data *opd = get_opd_info (sym->section);
6304 bfd_vma symval = sym->value;
6305
6306 if (opd != NULL
6307 && opd->adjust != NULL
6308 && elf_section_data (sym->section)->relocs != NULL)
6309 {
6310 /* opd_entry_value will use cached relocs that have been
6311 adjusted, but with raw symbols. That means both local
6312 and global symbols need adjusting. */
6313 long adjust = opd->adjust[OPD_NDX (symval)];
6314 if (adjust == -1)
6315 return 0;
6316 symval += adjust;
6317 }
6318
6319 if (opd_entry_value (sym->section, symval,
6320 &sec, code_off, TRUE) == (bfd_vma) -1)
6321 return 0;
6322 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6323 symbol. This size has nothing to do with the code size of the
6324 function, which is what we're supposed to return, but the
6325 code size isn't available without looking up the dot-sym.
6326 However, doing that would be a waste of time particularly
6327 since elf_find_function will look at the dot-sym anyway.
6328 Now, elf_find_function will keep the largest size of any
6329 function sym found at the code address of interest, so return
6330 1 here to avoid it incorrectly caching a larger function size
6331 for a small function. This does mean we return the wrong
6332 size for a new-ABI function of size 24, but all that does is
6333 disable caching for such functions. */
6334 if (size == 24)
6335 size = 1;
6336 }
6337 else
6338 {
6339 if (sym->section != sec)
6340 return 0;
6341 *code_off = sym->value;
6342 }
6343 if (size == 0)
6344 size = 1;
6345 return size;
6346 }
6347
6348 /* Return true if symbol is a strong function defined in an ELFv2
6349 object with st_other localentry bits of zero, ie. its local entry
6350 point coincides with its global entry point. */
6351
6352 static bfd_boolean
6353 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6354 {
6355 return (h != NULL
6356 && h->type == STT_FUNC
6357 && h->root.type == bfd_link_hash_defined
6358 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6359 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6360 && is_ppc64_elf (h->root.u.def.section->owner)
6361 && abiversion (h->root.u.def.section->owner) >= 2);
6362 }
6363
6364 /* Return true if symbol is defined in a regular object file. */
6365
6366 static bfd_boolean
6367 is_static_defined (struct elf_link_hash_entry *h)
6368 {
6369 return ((h->root.type == bfd_link_hash_defined
6370 || h->root.type == bfd_link_hash_defweak)
6371 && h->root.u.def.section != NULL
6372 && h->root.u.def.section->output_section != NULL);
6373 }
6374
6375 /* If FDH is a function descriptor symbol, return the associated code
6376 entry symbol if it is defined. Return NULL otherwise. */
6377
6378 static struct ppc_link_hash_entry *
6379 defined_code_entry (struct ppc_link_hash_entry *fdh)
6380 {
6381 if (fdh->is_func_descriptor)
6382 {
6383 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6384 if (fh->elf.root.type == bfd_link_hash_defined
6385 || fh->elf.root.type == bfd_link_hash_defweak)
6386 return fh;
6387 }
6388 return NULL;
6389 }
6390
6391 /* If FH is a function code entry symbol, return the associated
6392 function descriptor symbol if it is defined. Return NULL otherwise. */
6393
6394 static struct ppc_link_hash_entry *
6395 defined_func_desc (struct ppc_link_hash_entry *fh)
6396 {
6397 if (fh->oh != NULL
6398 && fh->oh->is_func_descriptor)
6399 {
6400 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6401 if (fdh->elf.root.type == bfd_link_hash_defined
6402 || fdh->elf.root.type == bfd_link_hash_defweak)
6403 return fdh;
6404 }
6405 return NULL;
6406 }
6407
6408 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6409
6410 /* Garbage collect sections, after first dealing with dot-symbols. */
6411
6412 static bfd_boolean
6413 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6414 {
6415 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6416
6417 if (htab != NULL && htab->need_func_desc_adj)
6418 {
6419 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6420 htab->need_func_desc_adj = 0;
6421 }
6422 return bfd_elf_gc_sections (abfd, info);
6423 }
6424
6425 /* Mark all our entry sym sections, both opd and code section. */
6426
6427 static void
6428 ppc64_elf_gc_keep (struct bfd_link_info *info)
6429 {
6430 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6431 struct bfd_sym_chain *sym;
6432
6433 if (htab == NULL)
6434 return;
6435
6436 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6437 {
6438 struct ppc_link_hash_entry *eh, *fh;
6439 asection *sec;
6440
6441 eh = (struct ppc_link_hash_entry *)
6442 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6443 if (eh == NULL)
6444 continue;
6445 if (eh->elf.root.type != bfd_link_hash_defined
6446 && eh->elf.root.type != bfd_link_hash_defweak)
6447 continue;
6448
6449 fh = defined_code_entry (eh);
6450 if (fh != NULL)
6451 {
6452 sec = fh->elf.root.u.def.section;
6453 sec->flags |= SEC_KEEP;
6454 }
6455 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6456 && opd_entry_value (eh->elf.root.u.def.section,
6457 eh->elf.root.u.def.value,
6458 &sec, NULL, FALSE) != (bfd_vma) -1)
6459 sec->flags |= SEC_KEEP;
6460
6461 sec = eh->elf.root.u.def.section;
6462 sec->flags |= SEC_KEEP;
6463 }
6464 }
6465
6466 /* Mark sections containing dynamically referenced symbols. When
6467 building shared libraries, we must assume that any visible symbol is
6468 referenced. */
6469
6470 static bfd_boolean
6471 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6472 {
6473 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6474 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6475 struct ppc_link_hash_entry *fdh;
6476 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6477
6478 /* Dynamic linking info is on the func descriptor sym. */
6479 fdh = defined_func_desc (eh);
6480 if (fdh != NULL)
6481 eh = fdh;
6482
6483 if ((eh->elf.root.type == bfd_link_hash_defined
6484 || eh->elf.root.type == bfd_link_hash_defweak)
6485 && (eh->elf.ref_dynamic
6486 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6487 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6488 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6489 && (!bfd_link_executable (info)
6490 || info->gc_keep_exported
6491 || info->export_dynamic
6492 || (eh->elf.dynamic
6493 && d != NULL
6494 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6495 && (eh->elf.versioned >= versioned
6496 || !bfd_hide_sym_by_version (info->version_info,
6497 eh->elf.root.root.string)))))
6498 {
6499 asection *code_sec;
6500 struct ppc_link_hash_entry *fh;
6501
6502 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6503
6504 /* Function descriptor syms cause the associated
6505 function code sym section to be marked. */
6506 fh = defined_code_entry (eh);
6507 if (fh != NULL)
6508 {
6509 code_sec = fh->elf.root.u.def.section;
6510 code_sec->flags |= SEC_KEEP;
6511 }
6512 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6513 && opd_entry_value (eh->elf.root.u.def.section,
6514 eh->elf.root.u.def.value,
6515 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6516 code_sec->flags |= SEC_KEEP;
6517 }
6518
6519 return TRUE;
6520 }
6521
6522 /* Return the section that should be marked against GC for a given
6523 relocation. */
6524
6525 static asection *
6526 ppc64_elf_gc_mark_hook (asection *sec,
6527 struct bfd_link_info *info,
6528 Elf_Internal_Rela *rel,
6529 struct elf_link_hash_entry *h,
6530 Elf_Internal_Sym *sym)
6531 {
6532 asection *rsec;
6533
6534 /* Syms return NULL if we're marking .opd, so we avoid marking all
6535 function sections, as all functions are referenced in .opd. */
6536 rsec = NULL;
6537 if (get_opd_info (sec) != NULL)
6538 return rsec;
6539
6540 if (h != NULL)
6541 {
6542 enum elf_ppc64_reloc_type r_type;
6543 struct ppc_link_hash_entry *eh, *fh, *fdh;
6544
6545 r_type = ELF64_R_TYPE (rel->r_info);
6546 switch (r_type)
6547 {
6548 case R_PPC64_GNU_VTINHERIT:
6549 case R_PPC64_GNU_VTENTRY:
6550 break;
6551
6552 default:
6553 switch (h->root.type)
6554 {
6555 case bfd_link_hash_defined:
6556 case bfd_link_hash_defweak:
6557 eh = (struct ppc_link_hash_entry *) h;
6558 fdh = defined_func_desc (eh);
6559 if (fdh != NULL)
6560 {
6561 /* -mcall-aixdesc code references the dot-symbol on
6562 a call reloc. Mark the function descriptor too
6563 against garbage collection. */
6564 fdh->elf.mark = 1;
6565 if (fdh->elf.u.weakdef != NULL)
6566 fdh->elf.u.weakdef->mark = 1;
6567 eh = fdh;
6568 }
6569
6570 /* Function descriptor syms cause the associated
6571 function code sym section to be marked. */
6572 fh = defined_code_entry (eh);
6573 if (fh != NULL)
6574 {
6575 /* They also mark their opd section. */
6576 eh->elf.root.u.def.section->gc_mark = 1;
6577
6578 rsec = fh->elf.root.u.def.section;
6579 }
6580 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6581 && opd_entry_value (eh->elf.root.u.def.section,
6582 eh->elf.root.u.def.value,
6583 &rsec, NULL, FALSE) != (bfd_vma) -1)
6584 eh->elf.root.u.def.section->gc_mark = 1;
6585 else
6586 rsec = h->root.u.def.section;
6587 break;
6588
6589 case bfd_link_hash_common:
6590 rsec = h->root.u.c.p->section;
6591 break;
6592
6593 default:
6594 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6595 }
6596 }
6597 }
6598 else
6599 {
6600 struct _opd_sec_data *opd;
6601
6602 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6603 opd = get_opd_info (rsec);
6604 if (opd != NULL && opd->func_sec != NULL)
6605 {
6606 rsec->gc_mark = 1;
6607
6608 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6609 }
6610 }
6611
6612 return rsec;
6613 }
6614
6615 /* Update the .got, .plt. and dynamic reloc reference counts for the
6616 section being removed. */
6617
6618 static bfd_boolean
6619 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6620 asection *sec, const Elf_Internal_Rela *relocs)
6621 {
6622 struct ppc_link_hash_table *htab;
6623 Elf_Internal_Shdr *symtab_hdr;
6624 struct elf_link_hash_entry **sym_hashes;
6625 struct got_entry **local_got_ents;
6626 const Elf_Internal_Rela *rel, *relend;
6627
6628 if (bfd_link_relocatable (info))
6629 return TRUE;
6630
6631 if ((sec->flags & SEC_ALLOC) == 0)
6632 return TRUE;
6633
6634 elf_section_data (sec)->local_dynrel = NULL;
6635
6636 htab = ppc_hash_table (info);
6637 if (htab == NULL)
6638 return FALSE;
6639
6640 symtab_hdr = &elf_symtab_hdr (abfd);
6641 sym_hashes = elf_sym_hashes (abfd);
6642 local_got_ents = elf_local_got_ents (abfd);
6643
6644 relend = relocs + sec->reloc_count;
6645 for (rel = relocs; rel < relend; rel++)
6646 {
6647 unsigned long r_symndx;
6648 enum elf_ppc64_reloc_type r_type;
6649 struct elf_link_hash_entry *h = NULL;
6650 struct plt_entry **plt_list = NULL;
6651 unsigned char tls_type = 0;
6652
6653 r_symndx = ELF64_R_SYM (rel->r_info);
6654 r_type = ELF64_R_TYPE (rel->r_info);
6655 if (r_symndx >= symtab_hdr->sh_info)
6656 {
6657 struct ppc_link_hash_entry *eh;
6658 struct elf_dyn_relocs **pp;
6659 struct elf_dyn_relocs *p;
6660
6661 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6662 h = elf_follow_link (h);
6663 eh = (struct ppc_link_hash_entry *) h;
6664
6665 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6666 if (p->sec == sec)
6667 {
6668 /* Everything must go for SEC. */
6669 *pp = p->next;
6670 break;
6671 }
6672 }
6673
6674 switch (r_type)
6675 {
6676 case R_PPC64_GOT_TLSLD16:
6677 case R_PPC64_GOT_TLSLD16_LO:
6678 case R_PPC64_GOT_TLSLD16_HI:
6679 case R_PPC64_GOT_TLSLD16_HA:
6680 tls_type = TLS_TLS | TLS_LD;
6681 goto dogot;
6682
6683 case R_PPC64_GOT_TLSGD16:
6684 case R_PPC64_GOT_TLSGD16_LO:
6685 case R_PPC64_GOT_TLSGD16_HI:
6686 case R_PPC64_GOT_TLSGD16_HA:
6687 tls_type = TLS_TLS | TLS_GD;
6688 goto dogot;
6689
6690 case R_PPC64_GOT_TPREL16_DS:
6691 case R_PPC64_GOT_TPREL16_LO_DS:
6692 case R_PPC64_GOT_TPREL16_HI:
6693 case R_PPC64_GOT_TPREL16_HA:
6694 tls_type = TLS_TLS | TLS_TPREL;
6695 goto dogot;
6696
6697 case R_PPC64_GOT_DTPREL16_DS:
6698 case R_PPC64_GOT_DTPREL16_LO_DS:
6699 case R_PPC64_GOT_DTPREL16_HI:
6700 case R_PPC64_GOT_DTPREL16_HA:
6701 tls_type = TLS_TLS | TLS_DTPREL;
6702 goto dogot;
6703
6704 case R_PPC64_GOT16:
6705 case R_PPC64_GOT16_DS:
6706 case R_PPC64_GOT16_HA:
6707 case R_PPC64_GOT16_HI:
6708 case R_PPC64_GOT16_LO:
6709 case R_PPC64_GOT16_LO_DS:
6710 dogot:
6711 {
6712 struct got_entry *ent;
6713
6714 if (h != NULL)
6715 ent = h->got.glist;
6716 else
6717 ent = local_got_ents[r_symndx];
6718
6719 for (; ent != NULL; ent = ent->next)
6720 if (ent->addend == rel->r_addend
6721 && ent->owner == abfd
6722 && ent->tls_type == tls_type)
6723 break;
6724 if (ent == NULL)
6725 abort ();
6726 if (ent->got.refcount > 0)
6727 ent->got.refcount -= 1;
6728 }
6729 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6730 plt_list = &h->plt.plist;
6731 break;
6732
6733 case R_PPC64_PLT16_HA:
6734 case R_PPC64_PLT16_HI:
6735 case R_PPC64_PLT16_LO:
6736 case R_PPC64_PLT32:
6737 case R_PPC64_PLT64:
6738 case R_PPC64_REL14:
6739 case R_PPC64_REL14_BRNTAKEN:
6740 case R_PPC64_REL14_BRTAKEN:
6741 case R_PPC64_REL24:
6742 if (h != NULL)
6743 plt_list = &h->plt.plist;
6744 else if (local_got_ents != NULL)
6745 {
6746 struct plt_entry **local_plt = (struct plt_entry **)
6747 (local_got_ents + symtab_hdr->sh_info);
6748 unsigned char *local_got_tls_masks = (unsigned char *)
6749 (local_plt + symtab_hdr->sh_info);
6750 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6751 plt_list = local_plt + r_symndx;
6752 }
6753 break;
6754
6755 case R_PPC64_ADDR64:
6756 case R_PPC64_ADDR16:
6757 case R_PPC64_ADDR16_DS:
6758 case R_PPC64_ADDR16_HA:
6759 case R_PPC64_ADDR16_HI:
6760 case R_PPC64_ADDR16_HIGH:
6761 case R_PPC64_ADDR16_HIGHA:
6762 case R_PPC64_ADDR16_HIGHER:
6763 case R_PPC64_ADDR16_HIGHERA:
6764 case R_PPC64_ADDR16_HIGHEST:
6765 case R_PPC64_ADDR16_HIGHESTA:
6766 case R_PPC64_ADDR16_LO:
6767 case R_PPC64_ADDR16_LO_DS:
6768 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6769 && rel->r_addend == 0)
6770 plt_list = &h->plt.plist;
6771 break;
6772
6773 default:
6774 break;
6775 }
6776 if (plt_list != NULL)
6777 {
6778 struct plt_entry *ent;
6779
6780 for (ent = *plt_list; ent != NULL; ent = ent->next)
6781 if (ent->addend == rel->r_addend)
6782 break;
6783 if (ent != NULL && ent->plt.refcount > 0)
6784 ent->plt.refcount -= 1;
6785 }
6786 }
6787 return TRUE;
6788 }
6789
6790 /* The maximum size of .sfpr. */
6791 #define SFPR_MAX (218*4)
6792
6793 struct sfpr_def_parms
6794 {
6795 const char name[12];
6796 unsigned char lo, hi;
6797 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6798 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6799 };
6800
6801 /* Auto-generate _save*, _rest* functions in .sfpr.
6802 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6803 instead. */
6804
6805 static bfd_boolean
6806 sfpr_define (struct bfd_link_info *info,
6807 const struct sfpr_def_parms *parm,
6808 asection *stub_sec)
6809 {
6810 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6811 unsigned int i;
6812 size_t len = strlen (parm->name);
6813 bfd_boolean writing = FALSE;
6814 char sym[16];
6815
6816 if (htab == NULL)
6817 return FALSE;
6818
6819 memcpy (sym, parm->name, len);
6820 sym[len + 2] = 0;
6821
6822 for (i = parm->lo; i <= parm->hi; i++)
6823 {
6824 struct ppc_link_hash_entry *h;
6825
6826 sym[len + 0] = i / 10 + '0';
6827 sym[len + 1] = i % 10 + '0';
6828 h = (struct ppc_link_hash_entry *)
6829 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6830 if (stub_sec != NULL)
6831 {
6832 if (h != NULL
6833 && h->elf.root.type == bfd_link_hash_defined
6834 && h->elf.root.u.def.section == htab->sfpr)
6835 {
6836 struct elf_link_hash_entry *s;
6837 char buf[32];
6838 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6839 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6840 if (s == NULL)
6841 return FALSE;
6842 if (s->root.type == bfd_link_hash_new
6843 || (s->root.type = bfd_link_hash_defined
6844 && s->root.u.def.section == stub_sec))
6845 {
6846 s->root.type = bfd_link_hash_defined;
6847 s->root.u.def.section = stub_sec;
6848 s->root.u.def.value = (stub_sec->size
6849 + h->elf.root.u.def.value);
6850 s->ref_regular = 1;
6851 s->def_regular = 1;
6852 s->ref_regular_nonweak = 1;
6853 s->forced_local = 1;
6854 s->non_elf = 0;
6855 s->root.linker_def = 1;
6856 }
6857 }
6858 continue;
6859 }
6860 if (h != NULL)
6861 {
6862 h->save_res = 1;
6863 if (!h->elf.def_regular)
6864 {
6865 h->elf.root.type = bfd_link_hash_defined;
6866 h->elf.root.u.def.section = htab->sfpr;
6867 h->elf.root.u.def.value = htab->sfpr->size;
6868 h->elf.type = STT_FUNC;
6869 h->elf.def_regular = 1;
6870 h->elf.non_elf = 0;
6871 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6872 writing = TRUE;
6873 if (htab->sfpr->contents == NULL)
6874 {
6875 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6876 if (htab->sfpr->contents == NULL)
6877 return FALSE;
6878 }
6879 }
6880 }
6881 if (writing)
6882 {
6883 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6884 if (i != parm->hi)
6885 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6886 else
6887 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6888 htab->sfpr->size = p - htab->sfpr->contents;
6889 }
6890 }
6891
6892 return TRUE;
6893 }
6894
6895 static bfd_byte *
6896 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6897 {
6898 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6899 return p + 4;
6900 }
6901
6902 static bfd_byte *
6903 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6904 {
6905 p = savegpr0 (abfd, p, r);
6906 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6907 p = p + 4;
6908 bfd_put_32 (abfd, BLR, p);
6909 return p + 4;
6910 }
6911
6912 static bfd_byte *
6913 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6914 {
6915 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6916 return p + 4;
6917 }
6918
6919 static bfd_byte *
6920 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6921 {
6922 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6923 p = p + 4;
6924 p = restgpr0 (abfd, p, r);
6925 bfd_put_32 (abfd, MTLR_R0, p);
6926 p = p + 4;
6927 if (r == 29)
6928 {
6929 p = restgpr0 (abfd, p, 30);
6930 p = restgpr0 (abfd, p, 31);
6931 }
6932 bfd_put_32 (abfd, BLR, p);
6933 return p + 4;
6934 }
6935
6936 static bfd_byte *
6937 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6938 {
6939 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6940 return p + 4;
6941 }
6942
6943 static bfd_byte *
6944 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6945 {
6946 p = savegpr1 (abfd, p, r);
6947 bfd_put_32 (abfd, BLR, p);
6948 return p + 4;
6949 }
6950
6951 static bfd_byte *
6952 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6953 {
6954 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6955 return p + 4;
6956 }
6957
6958 static bfd_byte *
6959 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6960 {
6961 p = restgpr1 (abfd, p, r);
6962 bfd_put_32 (abfd, BLR, p);
6963 return p + 4;
6964 }
6965
6966 static bfd_byte *
6967 savefpr (bfd *abfd, bfd_byte *p, int r)
6968 {
6969 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6970 return p + 4;
6971 }
6972
6973 static bfd_byte *
6974 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6975 {
6976 p = savefpr (abfd, p, r);
6977 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6978 p = p + 4;
6979 bfd_put_32 (abfd, BLR, p);
6980 return p + 4;
6981 }
6982
6983 static bfd_byte *
6984 restfpr (bfd *abfd, bfd_byte *p, int r)
6985 {
6986 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6987 return p + 4;
6988 }
6989
6990 static bfd_byte *
6991 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6992 {
6993 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6994 p = p + 4;
6995 p = restfpr (abfd, p, r);
6996 bfd_put_32 (abfd, MTLR_R0, p);
6997 p = p + 4;
6998 if (r == 29)
6999 {
7000 p = restfpr (abfd, p, 30);
7001 p = restfpr (abfd, p, 31);
7002 }
7003 bfd_put_32 (abfd, BLR, p);
7004 return p + 4;
7005 }
7006
7007 static bfd_byte *
7008 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
7009 {
7010 p = savefpr (abfd, p, r);
7011 bfd_put_32 (abfd, BLR, p);
7012 return p + 4;
7013 }
7014
7015 static bfd_byte *
7016 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
7017 {
7018 p = restfpr (abfd, p, r);
7019 bfd_put_32 (abfd, BLR, p);
7020 return p + 4;
7021 }
7022
7023 static bfd_byte *
7024 savevr (bfd *abfd, bfd_byte *p, int r)
7025 {
7026 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7027 p = p + 4;
7028 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
7029 return p + 4;
7030 }
7031
7032 static bfd_byte *
7033 savevr_tail (bfd *abfd, bfd_byte *p, int r)
7034 {
7035 p = savevr (abfd, p, r);
7036 bfd_put_32 (abfd, BLR, p);
7037 return p + 4;
7038 }
7039
7040 static bfd_byte *
7041 restvr (bfd *abfd, bfd_byte *p, int r)
7042 {
7043 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7044 p = p + 4;
7045 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7046 return p + 4;
7047 }
7048
7049 static bfd_byte *
7050 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7051 {
7052 p = restvr (abfd, p, r);
7053 bfd_put_32 (abfd, BLR, p);
7054 return p + 4;
7055 }
7056
7057 /* Called via elf_link_hash_traverse to transfer dynamic linking
7058 information on function code symbol entries to their corresponding
7059 function descriptor symbol entries. */
7060
7061 static bfd_boolean
7062 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7063 {
7064 struct bfd_link_info *info;
7065 struct ppc_link_hash_table *htab;
7066 struct ppc_link_hash_entry *fh;
7067 struct ppc_link_hash_entry *fdh;
7068 bfd_boolean force_local;
7069
7070 fh = (struct ppc_link_hash_entry *) h;
7071 if (fh->elf.root.type == bfd_link_hash_indirect)
7072 return TRUE;
7073
7074 if (!fh->is_func)
7075 return TRUE;
7076
7077 if (fh->elf.root.root.string[0] != '.'
7078 || fh->elf.root.root.string[1] == '\0')
7079 return TRUE;
7080
7081 info = inf;
7082 htab = ppc_hash_table (info);
7083 if (htab == NULL)
7084 return FALSE;
7085
7086 /* Find the corresponding function descriptor symbol. */
7087 fdh = lookup_fdh (fh, htab);
7088
7089 /* Resolve undefined references to dot-symbols as the value
7090 in the function descriptor, if we have one in a regular object.
7091 This is to satisfy cases like ".quad .foo". Calls to functions
7092 in dynamic objects are handled elsewhere. */
7093 if ((fh->elf.root.type == bfd_link_hash_undefined
7094 || fh->elf.root.type == bfd_link_hash_undefweak)
7095 && (fdh->elf.root.type == bfd_link_hash_defined
7096 || fdh->elf.root.type == bfd_link_hash_defweak)
7097 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7098 && opd_entry_value (fdh->elf.root.u.def.section,
7099 fdh->elf.root.u.def.value,
7100 &fh->elf.root.u.def.section,
7101 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7102 {
7103 fh->elf.root.type = fdh->elf.root.type;
7104 fh->elf.forced_local = 1;
7105 fh->elf.def_regular = fdh->elf.def_regular;
7106 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7107 }
7108
7109 if (!fh->elf.dynamic)
7110 {
7111 struct plt_entry *ent;
7112
7113 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7114 if (ent->plt.refcount > 0)
7115 break;
7116 if (ent == NULL)
7117 return TRUE;
7118 }
7119
7120 /* Create a descriptor as undefined if necessary. */
7121 if (fdh == NULL
7122 && !bfd_link_executable (info)
7123 && (fh->elf.root.type == bfd_link_hash_undefined
7124 || fh->elf.root.type == bfd_link_hash_undefweak))
7125 {
7126 fdh = make_fdh (info, fh);
7127 if (fdh == NULL)
7128 return FALSE;
7129 }
7130
7131 /* We can't support overriding of symbols on a fake descriptor. */
7132 if (fdh != NULL
7133 && fdh->fake
7134 && (fh->elf.root.type == bfd_link_hash_defined
7135 || fh->elf.root.type == bfd_link_hash_defweak))
7136 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7137
7138 /* Transfer dynamic linking information to the function descriptor. */
7139 if (fdh != NULL)
7140 {
7141 fdh->elf.ref_regular |= fh->elf.ref_regular;
7142 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7143 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7144 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7145 fdh->elf.dynamic |= fh->elf.dynamic;
7146 fdh->elf.needs_plt |= (fh->elf.needs_plt
7147 || fh->elf.type == STT_FUNC
7148 || fh->elf.type == STT_GNU_IFUNC);
7149 move_plt_plist (fh, fdh);
7150
7151 if (!fdh->elf.forced_local
7152 && fh->elf.dynindx != -1)
7153 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7154 return FALSE;
7155 }
7156
7157 /* Now that the info is on the function descriptor, clear the
7158 function code sym info. Any function code syms for which we
7159 don't have a definition in a regular file, we force local.
7160 This prevents a shared library from exporting syms that have
7161 been imported from another library. Function code syms that
7162 are really in the library we must leave global to prevent the
7163 linker dragging in a definition from a static library. */
7164 force_local = (!fh->elf.def_regular
7165 || fdh == NULL
7166 || !fdh->elf.def_regular
7167 || fdh->elf.forced_local);
7168 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7169
7170 return TRUE;
7171 }
7172
7173 static const struct sfpr_def_parms save_res_funcs[] =
7174 {
7175 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7176 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7177 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7178 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7179 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7180 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7181 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7182 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7183 { "._savef", 14, 31, savefpr, savefpr1_tail },
7184 { "._restf", 14, 31, restfpr, restfpr1_tail },
7185 { "_savevr_", 20, 31, savevr, savevr_tail },
7186 { "_restvr_", 20, 31, restvr, restvr_tail }
7187 };
7188
7189 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7190 this hook to a) provide some gcc support functions, and b) transfer
7191 dynamic linking information gathered so far on function code symbol
7192 entries, to their corresponding function descriptor symbol entries. */
7193
7194 static bfd_boolean
7195 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7196 struct bfd_link_info *info)
7197 {
7198 struct ppc_link_hash_table *htab;
7199
7200 htab = ppc_hash_table (info);
7201 if (htab == NULL)
7202 return FALSE;
7203
7204 /* Provide any missing _save* and _rest* functions. */
7205 if (htab->sfpr != NULL)
7206 {
7207 unsigned int i;
7208
7209 htab->sfpr->size = 0;
7210 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7211 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7212 return FALSE;
7213 if (htab->sfpr->size == 0)
7214 htab->sfpr->flags |= SEC_EXCLUDE;
7215 }
7216
7217 if (bfd_link_relocatable (info))
7218 return TRUE;
7219
7220 if (htab->elf.hgot != NULL)
7221 {
7222 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7223 /* Make .TOC. defined so as to prevent it being made dynamic.
7224 The wrong value here is fixed later in ppc64_elf_set_toc. */
7225 if (!htab->elf.hgot->def_regular
7226 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7227 {
7228 htab->elf.hgot->root.type = bfd_link_hash_defined;
7229 htab->elf.hgot->root.u.def.value = 0;
7230 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7231 htab->elf.hgot->def_regular = 1;
7232 htab->elf.hgot->root.linker_def = 1;
7233 }
7234 htab->elf.hgot->type = STT_OBJECT;
7235 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7236 | STV_HIDDEN);
7237 }
7238
7239 if (htab->need_func_desc_adj)
7240 {
7241 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7242 htab->need_func_desc_adj = 0;
7243 }
7244
7245 return TRUE;
7246 }
7247
7248 /* Return true if we have dynamic relocs against H that apply to
7249 read-only sections. */
7250
7251 static bfd_boolean
7252 readonly_dynrelocs (struct elf_link_hash_entry *h)
7253 {
7254 struct ppc_link_hash_entry *eh;
7255 struct elf_dyn_relocs *p;
7256
7257 eh = (struct ppc_link_hash_entry *) h;
7258 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7259 {
7260 asection *s = p->sec->output_section;
7261
7262 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7263 return TRUE;
7264 }
7265 return FALSE;
7266 }
7267
7268 /* Return true if we have dynamic relocs against H or any of its weak
7269 aliases, that apply to read-only sections. */
7270
7271 static bfd_boolean
7272 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7273 {
7274 struct ppc_link_hash_entry *eh;
7275
7276 eh = (struct ppc_link_hash_entry *) h;
7277 do
7278 {
7279 if (readonly_dynrelocs (&eh->elf))
7280 return TRUE;
7281 eh = eh->weakref;
7282 } while (eh != NULL && &eh->elf != h);
7283
7284 return FALSE;
7285 }
7286
7287 /* Return whether EH has pc-relative dynamic relocs. */
7288
7289 static bfd_boolean
7290 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7291 {
7292 struct elf_dyn_relocs *p;
7293
7294 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7295 if (p->pc_count != 0)
7296 return TRUE;
7297 return FALSE;
7298 }
7299
7300 /* Return true if a global entry stub will be created for H. Valid
7301 for ELFv2 before plt entries have been allocated. */
7302
7303 static bfd_boolean
7304 global_entry_stub (struct elf_link_hash_entry *h)
7305 {
7306 struct plt_entry *pent;
7307
7308 if (!h->pointer_equality_needed
7309 || h->def_regular)
7310 return FALSE;
7311
7312 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7313 if (pent->plt.refcount > 0
7314 && pent->addend == 0)
7315 return TRUE;
7316
7317 return FALSE;
7318 }
7319
7320 /* Adjust a symbol defined by a dynamic object and referenced by a
7321 regular object. The current definition is in some section of the
7322 dynamic object, but we're not including those sections. We have to
7323 change the definition to something the rest of the link can
7324 understand. */
7325
7326 static bfd_boolean
7327 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7328 struct elf_link_hash_entry *h)
7329 {
7330 struct ppc_link_hash_table *htab;
7331 asection *s, *srel;
7332
7333 htab = ppc_hash_table (info);
7334 if (htab == NULL)
7335 return FALSE;
7336
7337 /* Deal with function syms. */
7338 if (h->type == STT_FUNC
7339 || h->type == STT_GNU_IFUNC
7340 || h->needs_plt)
7341 {
7342 /* Clear procedure linkage table information for any symbol that
7343 won't need a .plt entry. */
7344 struct plt_entry *ent;
7345 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7346 if (ent->plt.refcount > 0)
7347 break;
7348 if (ent == NULL
7349 || (h->type != STT_GNU_IFUNC
7350 && (SYMBOL_CALLS_LOCAL (info, h)
7351 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7352 || ((struct ppc_link_hash_entry *) h)->save_res)
7353 {
7354 h->plt.plist = NULL;
7355 h->needs_plt = 0;
7356 h->pointer_equality_needed = 0;
7357 }
7358 else if (abiversion (info->output_bfd) >= 2)
7359 {
7360 /* Taking a function's address in a read/write section
7361 doesn't require us to define the function symbol in the
7362 executable on a global entry stub. A dynamic reloc can
7363 be used instead. The reason we prefer a few more dynamic
7364 relocs is that calling via a global entry stub costs a
7365 few more instructions, and pointer_equality_needed causes
7366 extra work in ld.so when resolving these symbols. */
7367 if (global_entry_stub (h)
7368 && !alias_readonly_dynrelocs (h))
7369 {
7370 h->pointer_equality_needed = 0;
7371 /* After adjust_dynamic_symbol, non_got_ref set in
7372 the non-pic case means that dyn_relocs for this
7373 symbol should be discarded. */
7374 h->non_got_ref = 0;
7375 }
7376
7377 /* If making a plt entry, then we don't need copy relocs. */
7378 return TRUE;
7379 }
7380 }
7381 else
7382 h->plt.plist = NULL;
7383
7384 /* If this is a weak symbol, and there is a real definition, the
7385 processor independent code will have arranged for us to see the
7386 real definition first, and we can just use the same value. */
7387 if (h->u.weakdef != NULL)
7388 {
7389 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7390 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7391 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7392 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7393 if (ELIMINATE_COPY_RELOCS)
7394 h->non_got_ref = h->u.weakdef->non_got_ref;
7395 return TRUE;
7396 }
7397
7398 /* If we are creating a shared library, we must presume that the
7399 only references to the symbol are via the global offset table.
7400 For such cases we need not do anything here; the relocations will
7401 be handled correctly by relocate_section. */
7402 if (bfd_link_pic (info))
7403 return TRUE;
7404
7405 /* If there are no references to this symbol that do not use the
7406 GOT, we don't need to generate a copy reloc. */
7407 if (!h->non_got_ref)
7408 return TRUE;
7409
7410 /* Don't generate a copy reloc for symbols defined in the executable. */
7411 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7412
7413 /* If -z nocopyreloc was given, don't generate them either. */
7414 || info->nocopyreloc
7415
7416 /* If we didn't find any dynamic relocs in read-only sections, then
7417 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7418 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7419
7420 /* Protected variables do not work with .dynbss. The copy in
7421 .dynbss won't be used by the shared library with the protected
7422 definition for the variable. Text relocations are preferable
7423 to an incorrect program. */
7424 || h->protected_def)
7425 {
7426 h->non_got_ref = 0;
7427 return TRUE;
7428 }
7429
7430 if (h->plt.plist != NULL)
7431 {
7432 /* We should never get here, but unfortunately there are versions
7433 of gcc out there that improperly (for this ABI) put initialized
7434 function pointers, vtable refs and suchlike in read-only
7435 sections. Allow them to proceed, but warn that this might
7436 break at runtime. */
7437 info->callbacks->einfo
7438 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7439 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7440 h->root.root.string);
7441 }
7442
7443 /* This is a reference to a symbol defined by a dynamic object which
7444 is not a function. */
7445
7446 /* We must allocate the symbol in our .dynbss section, which will
7447 become part of the .bss section of the executable. There will be
7448 an entry for this symbol in the .dynsym section. The dynamic
7449 object will contain position independent code, so all references
7450 from the dynamic object to this symbol will go through the global
7451 offset table. The dynamic linker will use the .dynsym entry to
7452 determine the address it must put in the global offset table, so
7453 both the dynamic object and the regular object will refer to the
7454 same memory location for the variable. */
7455
7456 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7457 to copy the initial value out of the dynamic object and into the
7458 runtime process image. We need to remember the offset into the
7459 .rela.bss section we are going to use. */
7460 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7461 {
7462 s = htab->elf.sdynrelro;
7463 srel = htab->elf.sreldynrelro;
7464 }
7465 else
7466 {
7467 s = htab->elf.sdynbss;
7468 srel = htab->elf.srelbss;
7469 }
7470 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7471 {
7472 srel->size += sizeof (Elf64_External_Rela);
7473 h->needs_copy = 1;
7474 }
7475
7476 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7477 }
7478
7479 /* If given a function descriptor symbol, hide both the function code
7480 sym and the descriptor. */
7481 static void
7482 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7483 struct elf_link_hash_entry *h,
7484 bfd_boolean force_local)
7485 {
7486 struct ppc_link_hash_entry *eh;
7487 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7488
7489 eh = (struct ppc_link_hash_entry *) h;
7490 if (eh->is_func_descriptor)
7491 {
7492 struct ppc_link_hash_entry *fh = eh->oh;
7493
7494 if (fh == NULL)
7495 {
7496 const char *p, *q;
7497 struct elf_link_hash_table *htab = elf_hash_table (info);
7498 char save;
7499
7500 /* We aren't supposed to use alloca in BFD because on
7501 systems which do not have alloca the version in libiberty
7502 calls xmalloc, which might cause the program to crash
7503 when it runs out of memory. This function doesn't have a
7504 return status, so there's no way to gracefully return an
7505 error. So cheat. We know that string[-1] can be safely
7506 accessed; It's either a string in an ELF string table,
7507 or allocated in an objalloc structure. */
7508
7509 p = eh->elf.root.root.string - 1;
7510 save = *p;
7511 *(char *) p = '.';
7512 fh = (struct ppc_link_hash_entry *)
7513 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7514 *(char *) p = save;
7515
7516 /* Unfortunately, if it so happens that the string we were
7517 looking for was allocated immediately before this string,
7518 then we overwrote the string terminator. That's the only
7519 reason the lookup should fail. */
7520 if (fh == NULL)
7521 {
7522 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7523 while (q >= eh->elf.root.root.string && *q == *p)
7524 --q, --p;
7525 if (q < eh->elf.root.root.string && *p == '.')
7526 fh = (struct ppc_link_hash_entry *)
7527 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7528 }
7529 if (fh != NULL)
7530 {
7531 eh->oh = fh;
7532 fh->oh = eh;
7533 }
7534 }
7535 if (fh != NULL)
7536 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7537 }
7538 }
7539
7540 static bfd_boolean
7541 get_sym_h (struct elf_link_hash_entry **hp,
7542 Elf_Internal_Sym **symp,
7543 asection **symsecp,
7544 unsigned char **tls_maskp,
7545 Elf_Internal_Sym **locsymsp,
7546 unsigned long r_symndx,
7547 bfd *ibfd)
7548 {
7549 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7550
7551 if (r_symndx >= symtab_hdr->sh_info)
7552 {
7553 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7554 struct elf_link_hash_entry *h;
7555
7556 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7557 h = elf_follow_link (h);
7558
7559 if (hp != NULL)
7560 *hp = h;
7561
7562 if (symp != NULL)
7563 *symp = NULL;
7564
7565 if (symsecp != NULL)
7566 {
7567 asection *symsec = NULL;
7568 if (h->root.type == bfd_link_hash_defined
7569 || h->root.type == bfd_link_hash_defweak)
7570 symsec = h->root.u.def.section;
7571 *symsecp = symsec;
7572 }
7573
7574 if (tls_maskp != NULL)
7575 {
7576 struct ppc_link_hash_entry *eh;
7577
7578 eh = (struct ppc_link_hash_entry *) h;
7579 *tls_maskp = &eh->tls_mask;
7580 }
7581 }
7582 else
7583 {
7584 Elf_Internal_Sym *sym;
7585 Elf_Internal_Sym *locsyms = *locsymsp;
7586
7587 if (locsyms == NULL)
7588 {
7589 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7590 if (locsyms == NULL)
7591 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7592 symtab_hdr->sh_info,
7593 0, NULL, NULL, NULL);
7594 if (locsyms == NULL)
7595 return FALSE;
7596 *locsymsp = locsyms;
7597 }
7598 sym = locsyms + r_symndx;
7599
7600 if (hp != NULL)
7601 *hp = NULL;
7602
7603 if (symp != NULL)
7604 *symp = sym;
7605
7606 if (symsecp != NULL)
7607 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7608
7609 if (tls_maskp != NULL)
7610 {
7611 struct got_entry **lgot_ents;
7612 unsigned char *tls_mask;
7613
7614 tls_mask = NULL;
7615 lgot_ents = elf_local_got_ents (ibfd);
7616 if (lgot_ents != NULL)
7617 {
7618 struct plt_entry **local_plt = (struct plt_entry **)
7619 (lgot_ents + symtab_hdr->sh_info);
7620 unsigned char *lgot_masks = (unsigned char *)
7621 (local_plt + symtab_hdr->sh_info);
7622 tls_mask = &lgot_masks[r_symndx];
7623 }
7624 *tls_maskp = tls_mask;
7625 }
7626 }
7627 return TRUE;
7628 }
7629
7630 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7631 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7632 type suitable for optimization, and 1 otherwise. */
7633
7634 static int
7635 get_tls_mask (unsigned char **tls_maskp,
7636 unsigned long *toc_symndx,
7637 bfd_vma *toc_addend,
7638 Elf_Internal_Sym **locsymsp,
7639 const Elf_Internal_Rela *rel,
7640 bfd *ibfd)
7641 {
7642 unsigned long r_symndx;
7643 int next_r;
7644 struct elf_link_hash_entry *h;
7645 Elf_Internal_Sym *sym;
7646 asection *sec;
7647 bfd_vma off;
7648
7649 r_symndx = ELF64_R_SYM (rel->r_info);
7650 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7651 return 0;
7652
7653 if ((*tls_maskp != NULL && **tls_maskp != 0)
7654 || sec == NULL
7655 || ppc64_elf_section_data (sec) == NULL
7656 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7657 return 1;
7658
7659 /* Look inside a TOC section too. */
7660 if (h != NULL)
7661 {
7662 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7663 off = h->root.u.def.value;
7664 }
7665 else
7666 off = sym->st_value;
7667 off += rel->r_addend;
7668 BFD_ASSERT (off % 8 == 0);
7669 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7670 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7671 if (toc_symndx != NULL)
7672 *toc_symndx = r_symndx;
7673 if (toc_addend != NULL)
7674 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7675 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7676 return 0;
7677 if ((h == NULL || is_static_defined (h))
7678 && (next_r == -1 || next_r == -2))
7679 return 1 - next_r;
7680 return 1;
7681 }
7682
7683 /* Find (or create) an entry in the tocsave hash table. */
7684
7685 static struct tocsave_entry *
7686 tocsave_find (struct ppc_link_hash_table *htab,
7687 enum insert_option insert,
7688 Elf_Internal_Sym **local_syms,
7689 const Elf_Internal_Rela *irela,
7690 bfd *ibfd)
7691 {
7692 unsigned long r_indx;
7693 struct elf_link_hash_entry *h;
7694 Elf_Internal_Sym *sym;
7695 struct tocsave_entry ent, *p;
7696 hashval_t hash;
7697 struct tocsave_entry **slot;
7698
7699 r_indx = ELF64_R_SYM (irela->r_info);
7700 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7701 return NULL;
7702 if (ent.sec == NULL || ent.sec->output_section == NULL)
7703 {
7704 _bfd_error_handler
7705 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7706 return NULL;
7707 }
7708
7709 if (h != NULL)
7710 ent.offset = h->root.u.def.value;
7711 else
7712 ent.offset = sym->st_value;
7713 ent.offset += irela->r_addend;
7714
7715 hash = tocsave_htab_hash (&ent);
7716 slot = ((struct tocsave_entry **)
7717 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7718 if (slot == NULL)
7719 return NULL;
7720
7721 if (*slot == NULL)
7722 {
7723 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7724 if (p == NULL)
7725 return NULL;
7726 *p = ent;
7727 *slot = p;
7728 }
7729 return *slot;
7730 }
7731
7732 /* Adjust all global syms defined in opd sections. In gcc generated
7733 code for the old ABI, these will already have been done. */
7734
7735 static bfd_boolean
7736 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7737 {
7738 struct ppc_link_hash_entry *eh;
7739 asection *sym_sec;
7740 struct _opd_sec_data *opd;
7741
7742 if (h->root.type == bfd_link_hash_indirect)
7743 return TRUE;
7744
7745 if (h->root.type != bfd_link_hash_defined
7746 && h->root.type != bfd_link_hash_defweak)
7747 return TRUE;
7748
7749 eh = (struct ppc_link_hash_entry *) h;
7750 if (eh->adjust_done)
7751 return TRUE;
7752
7753 sym_sec = eh->elf.root.u.def.section;
7754 opd = get_opd_info (sym_sec);
7755 if (opd != NULL && opd->adjust != NULL)
7756 {
7757 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7758 if (adjust == -1)
7759 {
7760 /* This entry has been deleted. */
7761 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7762 if (dsec == NULL)
7763 {
7764 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7765 if (discarded_section (dsec))
7766 {
7767 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7768 break;
7769 }
7770 }
7771 eh->elf.root.u.def.value = 0;
7772 eh->elf.root.u.def.section = dsec;
7773 }
7774 else
7775 eh->elf.root.u.def.value += adjust;
7776 eh->adjust_done = 1;
7777 }
7778 return TRUE;
7779 }
7780
7781 /* Handles decrementing dynamic reloc counts for the reloc specified by
7782 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7783 have already been determined. */
7784
7785 static bfd_boolean
7786 dec_dynrel_count (bfd_vma r_info,
7787 asection *sec,
7788 struct bfd_link_info *info,
7789 Elf_Internal_Sym **local_syms,
7790 struct elf_link_hash_entry *h,
7791 Elf_Internal_Sym *sym)
7792 {
7793 enum elf_ppc64_reloc_type r_type;
7794 asection *sym_sec = NULL;
7795
7796 /* Can this reloc be dynamic? This switch, and later tests here
7797 should be kept in sync with the code in check_relocs. */
7798 r_type = ELF64_R_TYPE (r_info);
7799 switch (r_type)
7800 {
7801 default:
7802 return TRUE;
7803
7804 case R_PPC64_TPREL16:
7805 case R_PPC64_TPREL16_LO:
7806 case R_PPC64_TPREL16_HI:
7807 case R_PPC64_TPREL16_HA:
7808 case R_PPC64_TPREL16_DS:
7809 case R_PPC64_TPREL16_LO_DS:
7810 case R_PPC64_TPREL16_HIGH:
7811 case R_PPC64_TPREL16_HIGHA:
7812 case R_PPC64_TPREL16_HIGHER:
7813 case R_PPC64_TPREL16_HIGHERA:
7814 case R_PPC64_TPREL16_HIGHEST:
7815 case R_PPC64_TPREL16_HIGHESTA:
7816 case R_PPC64_TPREL64:
7817 case R_PPC64_DTPMOD64:
7818 case R_PPC64_DTPREL64:
7819 case R_PPC64_ADDR64:
7820 case R_PPC64_REL30:
7821 case R_PPC64_REL32:
7822 case R_PPC64_REL64:
7823 case R_PPC64_ADDR14:
7824 case R_PPC64_ADDR14_BRNTAKEN:
7825 case R_PPC64_ADDR14_BRTAKEN:
7826 case R_PPC64_ADDR16:
7827 case R_PPC64_ADDR16_DS:
7828 case R_PPC64_ADDR16_HA:
7829 case R_PPC64_ADDR16_HI:
7830 case R_PPC64_ADDR16_HIGH:
7831 case R_PPC64_ADDR16_HIGHA:
7832 case R_PPC64_ADDR16_HIGHER:
7833 case R_PPC64_ADDR16_HIGHERA:
7834 case R_PPC64_ADDR16_HIGHEST:
7835 case R_PPC64_ADDR16_HIGHESTA:
7836 case R_PPC64_ADDR16_LO:
7837 case R_PPC64_ADDR16_LO_DS:
7838 case R_PPC64_ADDR24:
7839 case R_PPC64_ADDR32:
7840 case R_PPC64_UADDR16:
7841 case R_PPC64_UADDR32:
7842 case R_PPC64_UADDR64:
7843 case R_PPC64_TOC:
7844 break;
7845 }
7846
7847 if (local_syms != NULL)
7848 {
7849 unsigned long r_symndx;
7850 bfd *ibfd = sec->owner;
7851
7852 r_symndx = ELF64_R_SYM (r_info);
7853 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7854 return FALSE;
7855 }
7856
7857 if ((bfd_link_pic (info)
7858 && (must_be_dyn_reloc (info, r_type)
7859 || (h != NULL
7860 && (!SYMBOLIC_BIND (info, h)
7861 || h->root.type == bfd_link_hash_defweak
7862 || !h->def_regular))))
7863 || (ELIMINATE_COPY_RELOCS
7864 && !bfd_link_pic (info)
7865 && h != NULL
7866 && (h->root.type == bfd_link_hash_defweak
7867 || !h->def_regular)))
7868 ;
7869 else
7870 return TRUE;
7871
7872 if (h != NULL)
7873 {
7874 struct elf_dyn_relocs *p;
7875 struct elf_dyn_relocs **pp;
7876 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7877
7878 /* elf_gc_sweep may have already removed all dyn relocs associated
7879 with local syms for a given section. Also, symbol flags are
7880 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7881 report a dynreloc miscount. */
7882 if (*pp == NULL && info->gc_sections)
7883 return TRUE;
7884
7885 while ((p = *pp) != NULL)
7886 {
7887 if (p->sec == sec)
7888 {
7889 if (!must_be_dyn_reloc (info, r_type))
7890 p->pc_count -= 1;
7891 p->count -= 1;
7892 if (p->count == 0)
7893 *pp = p->next;
7894 return TRUE;
7895 }
7896 pp = &p->next;
7897 }
7898 }
7899 else
7900 {
7901 struct ppc_dyn_relocs *p;
7902 struct ppc_dyn_relocs **pp;
7903 void *vpp;
7904 bfd_boolean is_ifunc;
7905
7906 if (local_syms == NULL)
7907 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7908 if (sym_sec == NULL)
7909 sym_sec = sec;
7910
7911 vpp = &elf_section_data (sym_sec)->local_dynrel;
7912 pp = (struct ppc_dyn_relocs **) vpp;
7913
7914 if (*pp == NULL && info->gc_sections)
7915 return TRUE;
7916
7917 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7918 while ((p = *pp) != NULL)
7919 {
7920 if (p->sec == sec && p->ifunc == is_ifunc)
7921 {
7922 p->count -= 1;
7923 if (p->count == 0)
7924 *pp = p->next;
7925 return TRUE;
7926 }
7927 pp = &p->next;
7928 }
7929 }
7930
7931 /* xgettext:c-format */
7932 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7933 sec->owner, sec);
7934 bfd_set_error (bfd_error_bad_value);
7935 return FALSE;
7936 }
7937
7938 /* Remove unused Official Procedure Descriptor entries. Currently we
7939 only remove those associated with functions in discarded link-once
7940 sections, or weakly defined functions that have been overridden. It
7941 would be possible to remove many more entries for statically linked
7942 applications. */
7943
7944 bfd_boolean
7945 ppc64_elf_edit_opd (struct bfd_link_info *info)
7946 {
7947 bfd *ibfd;
7948 bfd_boolean some_edited = FALSE;
7949 asection *need_pad = NULL;
7950 struct ppc_link_hash_table *htab;
7951
7952 htab = ppc_hash_table (info);
7953 if (htab == NULL)
7954 return FALSE;
7955
7956 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7957 {
7958 asection *sec;
7959 Elf_Internal_Rela *relstart, *rel, *relend;
7960 Elf_Internal_Shdr *symtab_hdr;
7961 Elf_Internal_Sym *local_syms;
7962 struct _opd_sec_data *opd;
7963 bfd_boolean need_edit, add_aux_fields, broken;
7964 bfd_size_type cnt_16b = 0;
7965
7966 if (!is_ppc64_elf (ibfd))
7967 continue;
7968
7969 sec = bfd_get_section_by_name (ibfd, ".opd");
7970 if (sec == NULL || sec->size == 0)
7971 continue;
7972
7973 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7974 continue;
7975
7976 if (sec->output_section == bfd_abs_section_ptr)
7977 continue;
7978
7979 /* Look through the section relocs. */
7980 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7981 continue;
7982
7983 local_syms = NULL;
7984 symtab_hdr = &elf_symtab_hdr (ibfd);
7985
7986 /* Read the relocations. */
7987 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7988 info->keep_memory);
7989 if (relstart == NULL)
7990 return FALSE;
7991
7992 /* First run through the relocs to check they are sane, and to
7993 determine whether we need to edit this opd section. */
7994 need_edit = FALSE;
7995 broken = FALSE;
7996 need_pad = sec;
7997 relend = relstart + sec->reloc_count;
7998 for (rel = relstart; rel < relend; )
7999 {
8000 enum elf_ppc64_reloc_type r_type;
8001 unsigned long r_symndx;
8002 asection *sym_sec;
8003 struct elf_link_hash_entry *h;
8004 Elf_Internal_Sym *sym;
8005 bfd_vma offset;
8006
8007 /* .opd contains an array of 16 or 24 byte entries. We're
8008 only interested in the reloc pointing to a function entry
8009 point. */
8010 offset = rel->r_offset;
8011 if (rel + 1 == relend
8012 || rel[1].r_offset != offset + 8)
8013 {
8014 /* If someone messes with .opd alignment then after a
8015 "ld -r" we might have padding in the middle of .opd.
8016 Also, there's nothing to prevent someone putting
8017 something silly in .opd with the assembler. No .opd
8018 optimization for them! */
8019 broken_opd:
8020 _bfd_error_handler
8021 (_("%B: .opd is not a regular array of opd entries"), ibfd);
8022 broken = TRUE;
8023 break;
8024 }
8025
8026 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
8027 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
8028 {
8029 _bfd_error_handler
8030 /* xgettext:c-format */
8031 (_("%B: unexpected reloc type %u in .opd section"),
8032 ibfd, r_type);
8033 broken = TRUE;
8034 break;
8035 }
8036
8037 r_symndx = ELF64_R_SYM (rel->r_info);
8038 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8039 r_symndx, ibfd))
8040 goto error_ret;
8041
8042 if (sym_sec == NULL || sym_sec->owner == NULL)
8043 {
8044 const char *sym_name;
8045 if (h != NULL)
8046 sym_name = h->root.root.string;
8047 else
8048 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8049 sym_sec);
8050
8051 _bfd_error_handler
8052 /* xgettext:c-format */
8053 (_("%B: undefined sym `%s' in .opd section"),
8054 ibfd, sym_name);
8055 broken = TRUE;
8056 break;
8057 }
8058
8059 /* opd entries are always for functions defined in the
8060 current input bfd. If the symbol isn't defined in the
8061 input bfd, then we won't be using the function in this
8062 bfd; It must be defined in a linkonce section in another
8063 bfd, or is weak. It's also possible that we are
8064 discarding the function due to a linker script /DISCARD/,
8065 which we test for via the output_section. */
8066 if (sym_sec->owner != ibfd
8067 || sym_sec->output_section == bfd_abs_section_ptr)
8068 need_edit = TRUE;
8069
8070 rel += 2;
8071 if (rel + 1 == relend
8072 || (rel + 2 < relend
8073 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8074 ++rel;
8075
8076 if (rel == relend)
8077 {
8078 if (sec->size == offset + 24)
8079 {
8080 need_pad = NULL;
8081 break;
8082 }
8083 if (sec->size == offset + 16)
8084 {
8085 cnt_16b++;
8086 break;
8087 }
8088 goto broken_opd;
8089 }
8090 else if (rel + 1 < relend
8091 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8092 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8093 {
8094 if (rel[0].r_offset == offset + 16)
8095 cnt_16b++;
8096 else if (rel[0].r_offset != offset + 24)
8097 goto broken_opd;
8098 }
8099 else
8100 goto broken_opd;
8101 }
8102
8103 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8104
8105 if (!broken && (need_edit || add_aux_fields))
8106 {
8107 Elf_Internal_Rela *write_rel;
8108 Elf_Internal_Shdr *rel_hdr;
8109 bfd_byte *rptr, *wptr;
8110 bfd_byte *new_contents;
8111 bfd_size_type amt;
8112
8113 new_contents = NULL;
8114 amt = OPD_NDX (sec->size) * sizeof (long);
8115 opd = &ppc64_elf_section_data (sec)->u.opd;
8116 opd->adjust = bfd_zalloc (sec->owner, amt);
8117 if (opd->adjust == NULL)
8118 return FALSE;
8119 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8120
8121 /* This seems a waste of time as input .opd sections are all
8122 zeros as generated by gcc, but I suppose there's no reason
8123 this will always be so. We might start putting something in
8124 the third word of .opd entries. */
8125 if ((sec->flags & SEC_IN_MEMORY) == 0)
8126 {
8127 bfd_byte *loc;
8128 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8129 {
8130 if (loc != NULL)
8131 free (loc);
8132 error_ret:
8133 if (local_syms != NULL
8134 && symtab_hdr->contents != (unsigned char *) local_syms)
8135 free (local_syms);
8136 if (elf_section_data (sec)->relocs != relstart)
8137 free (relstart);
8138 return FALSE;
8139 }
8140 sec->contents = loc;
8141 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8142 }
8143
8144 elf_section_data (sec)->relocs = relstart;
8145
8146 new_contents = sec->contents;
8147 if (add_aux_fields)
8148 {
8149 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8150 if (new_contents == NULL)
8151 return FALSE;
8152 need_pad = NULL;
8153 }
8154 wptr = new_contents;
8155 rptr = sec->contents;
8156 write_rel = relstart;
8157 for (rel = relstart; rel < relend; )
8158 {
8159 unsigned long r_symndx;
8160 asection *sym_sec;
8161 struct elf_link_hash_entry *h;
8162 struct ppc_link_hash_entry *fdh = NULL;
8163 Elf_Internal_Sym *sym;
8164 long opd_ent_size;
8165 Elf_Internal_Rela *next_rel;
8166 bfd_boolean skip;
8167
8168 r_symndx = ELF64_R_SYM (rel->r_info);
8169 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8170 r_symndx, ibfd))
8171 goto error_ret;
8172
8173 next_rel = rel + 2;
8174 if (next_rel + 1 == relend
8175 || (next_rel + 2 < relend
8176 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8177 ++next_rel;
8178
8179 /* See if the .opd entry is full 24 byte or
8180 16 byte (with fd_aux entry overlapped with next
8181 fd_func). */
8182 opd_ent_size = 24;
8183 if (next_rel == relend)
8184 {
8185 if (sec->size == rel->r_offset + 16)
8186 opd_ent_size = 16;
8187 }
8188 else if (next_rel->r_offset == rel->r_offset + 16)
8189 opd_ent_size = 16;
8190
8191 if (h != NULL
8192 && h->root.root.string[0] == '.')
8193 {
8194 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8195 if (fdh != NULL)
8196 {
8197 fdh = ppc_follow_link (fdh);
8198 if (fdh->elf.root.type != bfd_link_hash_defined
8199 && fdh->elf.root.type != bfd_link_hash_defweak)
8200 fdh = NULL;
8201 }
8202 }
8203
8204 skip = (sym_sec->owner != ibfd
8205 || sym_sec->output_section == bfd_abs_section_ptr);
8206 if (skip)
8207 {
8208 if (fdh != NULL && sym_sec->owner == ibfd)
8209 {
8210 /* Arrange for the function descriptor sym
8211 to be dropped. */
8212 fdh->elf.root.u.def.value = 0;
8213 fdh->elf.root.u.def.section = sym_sec;
8214 }
8215 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8216
8217 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8218 rel = next_rel;
8219 else
8220 while (1)
8221 {
8222 if (!dec_dynrel_count (rel->r_info, sec, info,
8223 NULL, h, sym))
8224 goto error_ret;
8225
8226 if (++rel == next_rel)
8227 break;
8228
8229 r_symndx = ELF64_R_SYM (rel->r_info);
8230 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8231 r_symndx, ibfd))
8232 goto error_ret;
8233 }
8234 }
8235 else
8236 {
8237 /* We'll be keeping this opd entry. */
8238 long adjust;
8239
8240 if (fdh != NULL)
8241 {
8242 /* Redefine the function descriptor symbol to
8243 this location in the opd section. It is
8244 necessary to update the value here rather
8245 than using an array of adjustments as we do
8246 for local symbols, because various places
8247 in the generic ELF code use the value
8248 stored in u.def.value. */
8249 fdh->elf.root.u.def.value = wptr - new_contents;
8250 fdh->adjust_done = 1;
8251 }
8252
8253 /* Local syms are a bit tricky. We could
8254 tweak them as they can be cached, but
8255 we'd need to look through the local syms
8256 for the function descriptor sym which we
8257 don't have at the moment. So keep an
8258 array of adjustments. */
8259 adjust = (wptr - new_contents) - (rptr - sec->contents);
8260 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8261
8262 if (wptr != rptr)
8263 memcpy (wptr, rptr, opd_ent_size);
8264 wptr += opd_ent_size;
8265 if (add_aux_fields && opd_ent_size == 16)
8266 {
8267 memset (wptr, '\0', 8);
8268 wptr += 8;
8269 }
8270
8271 /* We need to adjust any reloc offsets to point to the
8272 new opd entries. */
8273 for ( ; rel != next_rel; ++rel)
8274 {
8275 rel->r_offset += adjust;
8276 if (write_rel != rel)
8277 memcpy (write_rel, rel, sizeof (*rel));
8278 ++write_rel;
8279 }
8280 }
8281
8282 rptr += opd_ent_size;
8283 }
8284
8285 sec->size = wptr - new_contents;
8286 sec->reloc_count = write_rel - relstart;
8287 if (add_aux_fields)
8288 {
8289 free (sec->contents);
8290 sec->contents = new_contents;
8291 }
8292
8293 /* Fudge the header size too, as this is used later in
8294 elf_bfd_final_link if we are emitting relocs. */
8295 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8296 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8297 some_edited = TRUE;
8298 }
8299 else if (elf_section_data (sec)->relocs != relstart)
8300 free (relstart);
8301
8302 if (local_syms != NULL
8303 && symtab_hdr->contents != (unsigned char *) local_syms)
8304 {
8305 if (!info->keep_memory)
8306 free (local_syms);
8307 else
8308 symtab_hdr->contents = (unsigned char *) local_syms;
8309 }
8310 }
8311
8312 if (some_edited)
8313 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8314
8315 /* If we are doing a final link and the last .opd entry is just 16 byte
8316 long, add a 8 byte padding after it. */
8317 if (need_pad != NULL && !bfd_link_relocatable (info))
8318 {
8319 bfd_byte *p;
8320
8321 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8322 {
8323 BFD_ASSERT (need_pad->size > 0);
8324
8325 p = bfd_malloc (need_pad->size + 8);
8326 if (p == NULL)
8327 return FALSE;
8328
8329 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8330 p, 0, need_pad->size))
8331 return FALSE;
8332
8333 need_pad->contents = p;
8334 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8335 }
8336 else
8337 {
8338 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8339 if (p == NULL)
8340 return FALSE;
8341
8342 need_pad->contents = p;
8343 }
8344
8345 memset (need_pad->contents + need_pad->size, 0, 8);
8346 need_pad->size += 8;
8347 }
8348
8349 return TRUE;
8350 }
8351
8352 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8353
8354 asection *
8355 ppc64_elf_tls_setup (struct bfd_link_info *info)
8356 {
8357 struct ppc_link_hash_table *htab;
8358
8359 htab = ppc_hash_table (info);
8360 if (htab == NULL)
8361 return NULL;
8362
8363 if (abiversion (info->output_bfd) == 1)
8364 htab->opd_abi = 1;
8365
8366 if (htab->params->no_multi_toc)
8367 htab->do_multi_toc = 0;
8368 else if (!htab->do_multi_toc)
8369 htab->params->no_multi_toc = 1;
8370
8371 /* Default to --no-plt-localentry, as this option can cause problems
8372 with symbol interposition. For example, glibc libpthread.so and
8373 libc.so duplicate many pthread symbols, with a fallback
8374 implementation in libc.so. In some cases the fallback does more
8375 work than the pthread implementation. __pthread_condattr_destroy
8376 is one such symbol: the libpthread.so implementation is
8377 localentry:0 while the libc.so implementation is localentry:8.
8378 An app that "cleverly" uses dlopen to only load necessary
8379 libraries at runtime may omit loading libpthread.so when not
8380 running multi-threaded, which then results in the libc.so
8381 fallback symbols being used and ld.so complaining. Now there
8382 are workarounds in ld (see non_zero_localentry) to detect the
8383 pthread situation, but that may not be the only case where
8384 --plt-localentry can cause trouble. */
8385 if (htab->params->plt_localentry0 < 0)
8386 htab->params->plt_localentry0 = 0;
8387 if (htab->params->plt_localentry0
8388 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8389 FALSE, FALSE, FALSE) == NULL)
8390 info->callbacks->einfo
8391 (_("%P: warning: --plt-localentry is especially dangerous without "
8392 "ld.so support to detect ABI violations.\n"));
8393
8394 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8395 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8396 FALSE, FALSE, TRUE));
8397 /* Move dynamic linking info to the function descriptor sym. */
8398 if (htab->tls_get_addr != NULL)
8399 func_desc_adjust (&htab->tls_get_addr->elf, info);
8400 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8401 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8402 FALSE, FALSE, TRUE));
8403 if (htab->params->tls_get_addr_opt)
8404 {
8405 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8406
8407 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8408 FALSE, FALSE, TRUE);
8409 if (opt != NULL)
8410 func_desc_adjust (opt, info);
8411 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8412 FALSE, FALSE, TRUE);
8413 if (opt_fd != NULL
8414 && (opt_fd->root.type == bfd_link_hash_defined
8415 || opt_fd->root.type == bfd_link_hash_defweak))
8416 {
8417 /* If glibc supports an optimized __tls_get_addr call stub,
8418 signalled by the presence of __tls_get_addr_opt, and we'll
8419 be calling __tls_get_addr via a plt call stub, then
8420 make __tls_get_addr point to __tls_get_addr_opt. */
8421 tga_fd = &htab->tls_get_addr_fd->elf;
8422 if (htab->elf.dynamic_sections_created
8423 && tga_fd != NULL
8424 && (tga_fd->type == STT_FUNC
8425 || tga_fd->needs_plt)
8426 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8427 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8428 {
8429 struct plt_entry *ent;
8430
8431 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8432 if (ent->plt.refcount > 0)
8433 break;
8434 if (ent != NULL)
8435 {
8436 tga_fd->root.type = bfd_link_hash_indirect;
8437 tga_fd->root.u.i.link = &opt_fd->root;
8438 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8439 opt_fd->mark = 1;
8440 if (opt_fd->dynindx != -1)
8441 {
8442 /* Use __tls_get_addr_opt in dynamic relocations. */
8443 opt_fd->dynindx = -1;
8444 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8445 opt_fd->dynstr_index);
8446 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8447 return NULL;
8448 }
8449 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8450 tga = &htab->tls_get_addr->elf;
8451 if (opt != NULL && tga != NULL)
8452 {
8453 tga->root.type = bfd_link_hash_indirect;
8454 tga->root.u.i.link = &opt->root;
8455 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8456 opt->mark = 1;
8457 _bfd_elf_link_hash_hide_symbol (info, opt,
8458 tga->forced_local);
8459 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8460 }
8461 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8462 htab->tls_get_addr_fd->is_func_descriptor = 1;
8463 if (htab->tls_get_addr != NULL)
8464 {
8465 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8466 htab->tls_get_addr->is_func = 1;
8467 }
8468 }
8469 }
8470 }
8471 else if (htab->params->tls_get_addr_opt < 0)
8472 htab->params->tls_get_addr_opt = 0;
8473 }
8474 return _bfd_elf_tls_setup (info->output_bfd, info);
8475 }
8476
8477 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8478 HASH1 or HASH2. */
8479
8480 static bfd_boolean
8481 branch_reloc_hash_match (const bfd *ibfd,
8482 const Elf_Internal_Rela *rel,
8483 const struct ppc_link_hash_entry *hash1,
8484 const struct ppc_link_hash_entry *hash2)
8485 {
8486 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8487 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8488 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8489
8490 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8491 {
8492 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8493 struct elf_link_hash_entry *h;
8494
8495 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8496 h = elf_follow_link (h);
8497 if (h == &hash1->elf || h == &hash2->elf)
8498 return TRUE;
8499 }
8500 return FALSE;
8501 }
8502
8503 /* Run through all the TLS relocs looking for optimization
8504 opportunities. The linker has been hacked (see ppc64elf.em) to do
8505 a preliminary section layout so that we know the TLS segment
8506 offsets. We can't optimize earlier because some optimizations need
8507 to know the tp offset, and we need to optimize before allocating
8508 dynamic relocations. */
8509
8510 bfd_boolean
8511 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8512 {
8513 bfd *ibfd;
8514 asection *sec;
8515 struct ppc_link_hash_table *htab;
8516 unsigned char *toc_ref;
8517 int pass;
8518
8519 if (!bfd_link_executable (info))
8520 return TRUE;
8521
8522 htab = ppc_hash_table (info);
8523 if (htab == NULL)
8524 return FALSE;
8525
8526 /* Make two passes over the relocs. On the first pass, mark toc
8527 entries involved with tls relocs, and check that tls relocs
8528 involved in setting up a tls_get_addr call are indeed followed by
8529 such a call. If they are not, we can't do any tls optimization.
8530 On the second pass twiddle tls_mask flags to notify
8531 relocate_section that optimization can be done, and adjust got
8532 and plt refcounts. */
8533 toc_ref = NULL;
8534 for (pass = 0; pass < 2; ++pass)
8535 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8536 {
8537 Elf_Internal_Sym *locsyms = NULL;
8538 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8539
8540 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8541 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8542 {
8543 Elf_Internal_Rela *relstart, *rel, *relend;
8544 bfd_boolean found_tls_get_addr_arg = 0;
8545
8546 /* Read the relocations. */
8547 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8548 info->keep_memory);
8549 if (relstart == NULL)
8550 {
8551 free (toc_ref);
8552 return FALSE;
8553 }
8554
8555 relend = relstart + sec->reloc_count;
8556 for (rel = relstart; rel < relend; rel++)
8557 {
8558 enum elf_ppc64_reloc_type r_type;
8559 unsigned long r_symndx;
8560 struct elf_link_hash_entry *h;
8561 Elf_Internal_Sym *sym;
8562 asection *sym_sec;
8563 unsigned char *tls_mask;
8564 unsigned char tls_set, tls_clear, tls_type = 0;
8565 bfd_vma value;
8566 bfd_boolean ok_tprel, is_local;
8567 long toc_ref_index = 0;
8568 int expecting_tls_get_addr = 0;
8569 bfd_boolean ret = FALSE;
8570
8571 r_symndx = ELF64_R_SYM (rel->r_info);
8572 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8573 r_symndx, ibfd))
8574 {
8575 err_free_rel:
8576 if (elf_section_data (sec)->relocs != relstart)
8577 free (relstart);
8578 if (toc_ref != NULL)
8579 free (toc_ref);
8580 if (locsyms != NULL
8581 && (elf_symtab_hdr (ibfd).contents
8582 != (unsigned char *) locsyms))
8583 free (locsyms);
8584 return ret;
8585 }
8586
8587 if (h != NULL)
8588 {
8589 if (h->root.type == bfd_link_hash_defined
8590 || h->root.type == bfd_link_hash_defweak)
8591 value = h->root.u.def.value;
8592 else if (h->root.type == bfd_link_hash_undefweak)
8593 value = 0;
8594 else
8595 {
8596 found_tls_get_addr_arg = 0;
8597 continue;
8598 }
8599 }
8600 else
8601 /* Symbols referenced by TLS relocs must be of type
8602 STT_TLS. So no need for .opd local sym adjust. */
8603 value = sym->st_value;
8604
8605 ok_tprel = FALSE;
8606 is_local = FALSE;
8607 if (h == NULL
8608 || !h->def_dynamic)
8609 {
8610 is_local = TRUE;
8611 if (h != NULL
8612 && h->root.type == bfd_link_hash_undefweak)
8613 ok_tprel = TRUE;
8614 else if (sym_sec != NULL
8615 && sym_sec->output_section != NULL)
8616 {
8617 value += sym_sec->output_offset;
8618 value += sym_sec->output_section->vma;
8619 value -= htab->elf.tls_sec->vma;
8620 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8621 < (bfd_vma) 1 << 32);
8622 }
8623 }
8624
8625 r_type = ELF64_R_TYPE (rel->r_info);
8626 /* If this section has old-style __tls_get_addr calls
8627 without marker relocs, then check that each
8628 __tls_get_addr call reloc is preceded by a reloc
8629 that conceivably belongs to the __tls_get_addr arg
8630 setup insn. If we don't find matching arg setup
8631 relocs, don't do any tls optimization. */
8632 if (pass == 0
8633 && sec->has_tls_get_addr_call
8634 && h != NULL
8635 && (h == &htab->tls_get_addr->elf
8636 || h == &htab->tls_get_addr_fd->elf)
8637 && !found_tls_get_addr_arg
8638 && is_branch_reloc (r_type))
8639 {
8640 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8641 "TLS optimization disabled\n"),
8642 ibfd, sec, rel->r_offset);
8643 ret = TRUE;
8644 goto err_free_rel;
8645 }
8646
8647 found_tls_get_addr_arg = 0;
8648 switch (r_type)
8649 {
8650 case R_PPC64_GOT_TLSLD16:
8651 case R_PPC64_GOT_TLSLD16_LO:
8652 expecting_tls_get_addr = 1;
8653 found_tls_get_addr_arg = 1;
8654 /* Fall through. */
8655
8656 case R_PPC64_GOT_TLSLD16_HI:
8657 case R_PPC64_GOT_TLSLD16_HA:
8658 /* These relocs should never be against a symbol
8659 defined in a shared lib. Leave them alone if
8660 that turns out to be the case. */
8661 if (!is_local)
8662 continue;
8663
8664 /* LD -> LE */
8665 tls_set = 0;
8666 tls_clear = TLS_LD;
8667 tls_type = TLS_TLS | TLS_LD;
8668 break;
8669
8670 case R_PPC64_GOT_TLSGD16:
8671 case R_PPC64_GOT_TLSGD16_LO:
8672 expecting_tls_get_addr = 1;
8673 found_tls_get_addr_arg = 1;
8674 /* Fall through. */
8675
8676 case R_PPC64_GOT_TLSGD16_HI:
8677 case R_PPC64_GOT_TLSGD16_HA:
8678 if (ok_tprel)
8679 /* GD -> LE */
8680 tls_set = 0;
8681 else
8682 /* GD -> IE */
8683 tls_set = TLS_TLS | TLS_TPRELGD;
8684 tls_clear = TLS_GD;
8685 tls_type = TLS_TLS | TLS_GD;
8686 break;
8687
8688 case R_PPC64_GOT_TPREL16_DS:
8689 case R_PPC64_GOT_TPREL16_LO_DS:
8690 case R_PPC64_GOT_TPREL16_HI:
8691 case R_PPC64_GOT_TPREL16_HA:
8692 if (ok_tprel)
8693 {
8694 /* IE -> LE */
8695 tls_set = 0;
8696 tls_clear = TLS_TPREL;
8697 tls_type = TLS_TLS | TLS_TPREL;
8698 break;
8699 }
8700 continue;
8701
8702 case R_PPC64_TLSGD:
8703 case R_PPC64_TLSLD:
8704 found_tls_get_addr_arg = 1;
8705 /* Fall through. */
8706
8707 case R_PPC64_TLS:
8708 case R_PPC64_TOC16:
8709 case R_PPC64_TOC16_LO:
8710 if (sym_sec == NULL || sym_sec != toc)
8711 continue;
8712
8713 /* Mark this toc entry as referenced by a TLS
8714 code sequence. We can do that now in the
8715 case of R_PPC64_TLS, and after checking for
8716 tls_get_addr for the TOC16 relocs. */
8717 if (toc_ref == NULL)
8718 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8719 if (toc_ref == NULL)
8720 goto err_free_rel;
8721
8722 if (h != NULL)
8723 value = h->root.u.def.value;
8724 else
8725 value = sym->st_value;
8726 value += rel->r_addend;
8727 if (value % 8 != 0)
8728 continue;
8729 BFD_ASSERT (value < toc->size
8730 && toc->output_offset % 8 == 0);
8731 toc_ref_index = (value + toc->output_offset) / 8;
8732 if (r_type == R_PPC64_TLS
8733 || r_type == R_PPC64_TLSGD
8734 || r_type == R_PPC64_TLSLD)
8735 {
8736 toc_ref[toc_ref_index] = 1;
8737 continue;
8738 }
8739
8740 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8741 continue;
8742
8743 tls_set = 0;
8744 tls_clear = 0;
8745 expecting_tls_get_addr = 2;
8746 break;
8747
8748 case R_PPC64_TPREL64:
8749 if (pass == 0
8750 || sec != toc
8751 || toc_ref == NULL
8752 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8753 continue;
8754 if (ok_tprel)
8755 {
8756 /* IE -> LE */
8757 tls_set = TLS_EXPLICIT;
8758 tls_clear = TLS_TPREL;
8759 break;
8760 }
8761 continue;
8762
8763 case R_PPC64_DTPMOD64:
8764 if (pass == 0
8765 || sec != toc
8766 || toc_ref == NULL
8767 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8768 continue;
8769 if (rel + 1 < relend
8770 && (rel[1].r_info
8771 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8772 && rel[1].r_offset == rel->r_offset + 8)
8773 {
8774 if (ok_tprel)
8775 /* GD -> LE */
8776 tls_set = TLS_EXPLICIT | TLS_GD;
8777 else
8778 /* GD -> IE */
8779 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8780 tls_clear = TLS_GD;
8781 }
8782 else
8783 {
8784 if (!is_local)
8785 continue;
8786
8787 /* LD -> LE */
8788 tls_set = TLS_EXPLICIT;
8789 tls_clear = TLS_LD;
8790 }
8791 break;
8792
8793 default:
8794 continue;
8795 }
8796
8797 if (pass == 0)
8798 {
8799 if (!expecting_tls_get_addr
8800 || !sec->has_tls_get_addr_call)
8801 continue;
8802
8803 if (rel + 1 < relend
8804 && branch_reloc_hash_match (ibfd, rel + 1,
8805 htab->tls_get_addr,
8806 htab->tls_get_addr_fd))
8807 {
8808 if (expecting_tls_get_addr == 2)
8809 {
8810 /* Check for toc tls entries. */
8811 unsigned char *toc_tls;
8812 int retval;
8813
8814 retval = get_tls_mask (&toc_tls, NULL, NULL,
8815 &locsyms,
8816 rel, ibfd);
8817 if (retval == 0)
8818 goto err_free_rel;
8819 if (toc_tls != NULL)
8820 {
8821 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8822 found_tls_get_addr_arg = 1;
8823 if (retval > 1)
8824 toc_ref[toc_ref_index] = 1;
8825 }
8826 }
8827 continue;
8828 }
8829
8830 if (expecting_tls_get_addr != 1)
8831 continue;
8832
8833 /* Uh oh, we didn't find the expected call. We
8834 could just mark this symbol to exclude it
8835 from tls optimization but it's safer to skip
8836 the entire optimization. */
8837 /* xgettext:c-format */
8838 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8839 "TLS optimization disabled\n"),
8840 ibfd, sec, rel->r_offset);
8841 ret = TRUE;
8842 goto err_free_rel;
8843 }
8844
8845 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8846 {
8847 struct plt_entry *ent;
8848 for (ent = htab->tls_get_addr->elf.plt.plist;
8849 ent != NULL;
8850 ent = ent->next)
8851 if (ent->addend == 0)
8852 {
8853 if (ent->plt.refcount > 0)
8854 {
8855 ent->plt.refcount -= 1;
8856 expecting_tls_get_addr = 0;
8857 }
8858 break;
8859 }
8860 }
8861
8862 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8863 {
8864 struct plt_entry *ent;
8865 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8866 ent != NULL;
8867 ent = ent->next)
8868 if (ent->addend == 0)
8869 {
8870 if (ent->plt.refcount > 0)
8871 ent->plt.refcount -= 1;
8872 break;
8873 }
8874 }
8875
8876 if (tls_clear == 0)
8877 continue;
8878
8879 if ((tls_set & TLS_EXPLICIT) == 0)
8880 {
8881 struct got_entry *ent;
8882
8883 /* Adjust got entry for this reloc. */
8884 if (h != NULL)
8885 ent = h->got.glist;
8886 else
8887 ent = elf_local_got_ents (ibfd)[r_symndx];
8888
8889 for (; ent != NULL; ent = ent->next)
8890 if (ent->addend == rel->r_addend
8891 && ent->owner == ibfd
8892 && ent->tls_type == tls_type)
8893 break;
8894 if (ent == NULL)
8895 abort ();
8896
8897 if (tls_set == 0)
8898 {
8899 /* We managed to get rid of a got entry. */
8900 if (ent->got.refcount > 0)
8901 ent->got.refcount -= 1;
8902 }
8903 }
8904 else
8905 {
8906 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8907 we'll lose one or two dyn relocs. */
8908 if (!dec_dynrel_count (rel->r_info, sec, info,
8909 NULL, h, sym))
8910 return FALSE;
8911
8912 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8913 {
8914 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8915 NULL, h, sym))
8916 return FALSE;
8917 }
8918 }
8919
8920 *tls_mask |= tls_set;
8921 *tls_mask &= ~tls_clear;
8922 }
8923
8924 if (elf_section_data (sec)->relocs != relstart)
8925 free (relstart);
8926 }
8927
8928 if (locsyms != NULL
8929 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8930 {
8931 if (!info->keep_memory)
8932 free (locsyms);
8933 else
8934 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8935 }
8936 }
8937
8938 if (toc_ref != NULL)
8939 free (toc_ref);
8940 htab->do_tls_opt = 1;
8941 return TRUE;
8942 }
8943
8944 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8945 the values of any global symbols in a toc section that has been
8946 edited. Globals in toc sections should be a rarity, so this function
8947 sets a flag if any are found in toc sections other than the one just
8948 edited, so that further hash table traversals can be avoided. */
8949
8950 struct adjust_toc_info
8951 {
8952 asection *toc;
8953 unsigned long *skip;
8954 bfd_boolean global_toc_syms;
8955 };
8956
8957 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8958
8959 static bfd_boolean
8960 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8961 {
8962 struct ppc_link_hash_entry *eh;
8963 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8964 unsigned long i;
8965
8966 if (h->root.type != bfd_link_hash_defined
8967 && h->root.type != bfd_link_hash_defweak)
8968 return TRUE;
8969
8970 eh = (struct ppc_link_hash_entry *) h;
8971 if (eh->adjust_done)
8972 return TRUE;
8973
8974 if (eh->elf.root.u.def.section == toc_inf->toc)
8975 {
8976 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8977 i = toc_inf->toc->rawsize >> 3;
8978 else
8979 i = eh->elf.root.u.def.value >> 3;
8980
8981 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8982 {
8983 _bfd_error_handler
8984 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8985 do
8986 ++i;
8987 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8988 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8989 }
8990
8991 eh->elf.root.u.def.value -= toc_inf->skip[i];
8992 eh->adjust_done = 1;
8993 }
8994 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8995 toc_inf->global_toc_syms = TRUE;
8996
8997 return TRUE;
8998 }
8999
9000 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
9001 on a _LO variety toc/got reloc. */
9002
9003 static bfd_boolean
9004 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
9005 {
9006 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
9007 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
9008 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
9009 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
9010 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
9011 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
9012 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
9013 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
9014 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
9015 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
9016 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
9017 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
9018 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
9019 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
9020 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
9021 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
9022 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
9023 /* Exclude lfqu by testing reloc. If relocs are ever
9024 defined for the reduced D field in psq_lu then those
9025 will need testing too. */
9026 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9027 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
9028 && (insn & 1) == 0)
9029 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
9030 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
9031 /* Exclude stfqu. psq_stu as above for psq_lu. */
9032 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9033 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
9034 && (insn & 1) == 0));
9035 }
9036
9037 /* Examine all relocs referencing .toc sections in order to remove
9038 unused .toc entries. */
9039
9040 bfd_boolean
9041 ppc64_elf_edit_toc (struct bfd_link_info *info)
9042 {
9043 bfd *ibfd;
9044 struct adjust_toc_info toc_inf;
9045 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9046
9047 htab->do_toc_opt = 1;
9048 toc_inf.global_toc_syms = TRUE;
9049 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9050 {
9051 asection *toc, *sec;
9052 Elf_Internal_Shdr *symtab_hdr;
9053 Elf_Internal_Sym *local_syms;
9054 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9055 unsigned long *skip, *drop;
9056 unsigned char *used;
9057 unsigned char *keep, last, some_unused;
9058
9059 if (!is_ppc64_elf (ibfd))
9060 continue;
9061
9062 toc = bfd_get_section_by_name (ibfd, ".toc");
9063 if (toc == NULL
9064 || toc->size == 0
9065 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9066 || discarded_section (toc))
9067 continue;
9068
9069 toc_relocs = NULL;
9070 local_syms = NULL;
9071 symtab_hdr = &elf_symtab_hdr (ibfd);
9072
9073 /* Look at sections dropped from the final link. */
9074 skip = NULL;
9075 relstart = NULL;
9076 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9077 {
9078 if (sec->reloc_count == 0
9079 || !discarded_section (sec)
9080 || get_opd_info (sec)
9081 || (sec->flags & SEC_ALLOC) == 0
9082 || (sec->flags & SEC_DEBUGGING) != 0)
9083 continue;
9084
9085 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9086 if (relstart == NULL)
9087 goto error_ret;
9088
9089 /* Run through the relocs to see which toc entries might be
9090 unused. */
9091 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9092 {
9093 enum elf_ppc64_reloc_type r_type;
9094 unsigned long r_symndx;
9095 asection *sym_sec;
9096 struct elf_link_hash_entry *h;
9097 Elf_Internal_Sym *sym;
9098 bfd_vma val;
9099
9100 r_type = ELF64_R_TYPE (rel->r_info);
9101 switch (r_type)
9102 {
9103 default:
9104 continue;
9105
9106 case R_PPC64_TOC16:
9107 case R_PPC64_TOC16_LO:
9108 case R_PPC64_TOC16_HI:
9109 case R_PPC64_TOC16_HA:
9110 case R_PPC64_TOC16_DS:
9111 case R_PPC64_TOC16_LO_DS:
9112 break;
9113 }
9114
9115 r_symndx = ELF64_R_SYM (rel->r_info);
9116 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9117 r_symndx, ibfd))
9118 goto error_ret;
9119
9120 if (sym_sec != toc)
9121 continue;
9122
9123 if (h != NULL)
9124 val = h->root.u.def.value;
9125 else
9126 val = sym->st_value;
9127 val += rel->r_addend;
9128
9129 if (val >= toc->size)
9130 continue;
9131
9132 /* Anything in the toc ought to be aligned to 8 bytes.
9133 If not, don't mark as unused. */
9134 if (val & 7)
9135 continue;
9136
9137 if (skip == NULL)
9138 {
9139 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9140 if (skip == NULL)
9141 goto error_ret;
9142 }
9143
9144 skip[val >> 3] = ref_from_discarded;
9145 }
9146
9147 if (elf_section_data (sec)->relocs != relstart)
9148 free (relstart);
9149 }
9150
9151 /* For largetoc loads of address constants, we can convert
9152 . addis rx,2,addr@got@ha
9153 . ld ry,addr@got@l(rx)
9154 to
9155 . addis rx,2,addr@toc@ha
9156 . addi ry,rx,addr@toc@l
9157 when addr is within 2G of the toc pointer. This then means
9158 that the word storing "addr" in the toc is no longer needed. */
9159
9160 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9161 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9162 && toc->reloc_count != 0)
9163 {
9164 /* Read toc relocs. */
9165 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9166 info->keep_memory);
9167 if (toc_relocs == NULL)
9168 goto error_ret;
9169
9170 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9171 {
9172 enum elf_ppc64_reloc_type r_type;
9173 unsigned long r_symndx;
9174 asection *sym_sec;
9175 struct elf_link_hash_entry *h;
9176 Elf_Internal_Sym *sym;
9177 bfd_vma val, addr;
9178
9179 r_type = ELF64_R_TYPE (rel->r_info);
9180 if (r_type != R_PPC64_ADDR64)
9181 continue;
9182
9183 r_symndx = ELF64_R_SYM (rel->r_info);
9184 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9185 r_symndx, ibfd))
9186 goto error_ret;
9187
9188 if (sym_sec == NULL
9189 || sym_sec->output_section == NULL
9190 || discarded_section (sym_sec))
9191 continue;
9192
9193 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9194 continue;
9195
9196 if (h != NULL)
9197 {
9198 if (h->type == STT_GNU_IFUNC)
9199 continue;
9200 val = h->root.u.def.value;
9201 }
9202 else
9203 {
9204 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9205 continue;
9206 val = sym->st_value;
9207 }
9208 val += rel->r_addend;
9209 val += sym_sec->output_section->vma + sym_sec->output_offset;
9210
9211 /* We don't yet know the exact toc pointer value, but we
9212 know it will be somewhere in the toc section. Don't
9213 optimize if the difference from any possible toc
9214 pointer is outside [ff..f80008000, 7fff7fff]. */
9215 addr = toc->output_section->vma + TOC_BASE_OFF;
9216 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9217 continue;
9218
9219 addr = toc->output_section->vma + toc->output_section->rawsize;
9220 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9221 continue;
9222
9223 if (skip == NULL)
9224 {
9225 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9226 if (skip == NULL)
9227 goto error_ret;
9228 }
9229
9230 skip[rel->r_offset >> 3]
9231 |= can_optimize | ((rel - toc_relocs) << 2);
9232 }
9233 }
9234
9235 if (skip == NULL)
9236 continue;
9237
9238 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9239 if (used == NULL)
9240 {
9241 error_ret:
9242 if (local_syms != NULL
9243 && symtab_hdr->contents != (unsigned char *) local_syms)
9244 free (local_syms);
9245 if (sec != NULL
9246 && relstart != NULL
9247 && elf_section_data (sec)->relocs != relstart)
9248 free (relstart);
9249 if (toc_relocs != NULL
9250 && elf_section_data (toc)->relocs != toc_relocs)
9251 free (toc_relocs);
9252 if (skip != NULL)
9253 free (skip);
9254 return FALSE;
9255 }
9256
9257 /* Now check all kept sections that might reference the toc.
9258 Check the toc itself last. */
9259 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9260 : ibfd->sections);
9261 sec != NULL;
9262 sec = (sec == toc ? NULL
9263 : sec->next == NULL ? toc
9264 : sec->next == toc && toc->next ? toc->next
9265 : sec->next))
9266 {
9267 int repeat;
9268
9269 if (sec->reloc_count == 0
9270 || discarded_section (sec)
9271 || get_opd_info (sec)
9272 || (sec->flags & SEC_ALLOC) == 0
9273 || (sec->flags & SEC_DEBUGGING) != 0)
9274 continue;
9275
9276 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9277 info->keep_memory);
9278 if (relstart == NULL)
9279 {
9280 free (used);
9281 goto error_ret;
9282 }
9283
9284 /* Mark toc entries referenced as used. */
9285 do
9286 {
9287 repeat = 0;
9288 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9289 {
9290 enum elf_ppc64_reloc_type r_type;
9291 unsigned long r_symndx;
9292 asection *sym_sec;
9293 struct elf_link_hash_entry *h;
9294 Elf_Internal_Sym *sym;
9295 bfd_vma val;
9296 enum {no_check, check_lo, check_ha} insn_check;
9297
9298 r_type = ELF64_R_TYPE (rel->r_info);
9299 switch (r_type)
9300 {
9301 default:
9302 insn_check = no_check;
9303 break;
9304
9305 case R_PPC64_GOT_TLSLD16_HA:
9306 case R_PPC64_GOT_TLSGD16_HA:
9307 case R_PPC64_GOT_TPREL16_HA:
9308 case R_PPC64_GOT_DTPREL16_HA:
9309 case R_PPC64_GOT16_HA:
9310 case R_PPC64_TOC16_HA:
9311 insn_check = check_ha;
9312 break;
9313
9314 case R_PPC64_GOT_TLSLD16_LO:
9315 case R_PPC64_GOT_TLSGD16_LO:
9316 case R_PPC64_GOT_TPREL16_LO_DS:
9317 case R_PPC64_GOT_DTPREL16_LO_DS:
9318 case R_PPC64_GOT16_LO:
9319 case R_PPC64_GOT16_LO_DS:
9320 case R_PPC64_TOC16_LO:
9321 case R_PPC64_TOC16_LO_DS:
9322 insn_check = check_lo;
9323 break;
9324 }
9325
9326 if (insn_check != no_check)
9327 {
9328 bfd_vma off = rel->r_offset & ~3;
9329 unsigned char buf[4];
9330 unsigned int insn;
9331
9332 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9333 {
9334 free (used);
9335 goto error_ret;
9336 }
9337 insn = bfd_get_32 (ibfd, buf);
9338 if (insn_check == check_lo
9339 ? !ok_lo_toc_insn (insn, r_type)
9340 : ((insn & ((0x3f << 26) | 0x1f << 16))
9341 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9342 {
9343 char str[12];
9344
9345 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9346 sprintf (str, "%#08x", insn);
9347 info->callbacks->einfo
9348 /* xgettext:c-format */
9349 (_("%H: toc optimization is not supported for"
9350 " %s instruction.\n"),
9351 ibfd, sec, rel->r_offset & ~3, str);
9352 }
9353 }
9354
9355 switch (r_type)
9356 {
9357 case R_PPC64_TOC16:
9358 case R_PPC64_TOC16_LO:
9359 case R_PPC64_TOC16_HI:
9360 case R_PPC64_TOC16_HA:
9361 case R_PPC64_TOC16_DS:
9362 case R_PPC64_TOC16_LO_DS:
9363 /* In case we're taking addresses of toc entries. */
9364 case R_PPC64_ADDR64:
9365 break;
9366
9367 default:
9368 continue;
9369 }
9370
9371 r_symndx = ELF64_R_SYM (rel->r_info);
9372 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9373 r_symndx, ibfd))
9374 {
9375 free (used);
9376 goto error_ret;
9377 }
9378
9379 if (sym_sec != toc)
9380 continue;
9381
9382 if (h != NULL)
9383 val = h->root.u.def.value;
9384 else
9385 val = sym->st_value;
9386 val += rel->r_addend;
9387
9388 if (val >= toc->size)
9389 continue;
9390
9391 if ((skip[val >> 3] & can_optimize) != 0)
9392 {
9393 bfd_vma off;
9394 unsigned char opc;
9395
9396 switch (r_type)
9397 {
9398 case R_PPC64_TOC16_HA:
9399 break;
9400
9401 case R_PPC64_TOC16_LO_DS:
9402 off = rel->r_offset;
9403 off += (bfd_big_endian (ibfd) ? -2 : 3);
9404 if (!bfd_get_section_contents (ibfd, sec, &opc,
9405 off, 1))
9406 {
9407 free (used);
9408 goto error_ret;
9409 }
9410 if ((opc & (0x3f << 2)) == (58u << 2))
9411 break;
9412 /* Fall through. */
9413
9414 default:
9415 /* Wrong sort of reloc, or not a ld. We may
9416 as well clear ref_from_discarded too. */
9417 skip[val >> 3] = 0;
9418 }
9419 }
9420
9421 if (sec != toc)
9422 used[val >> 3] = 1;
9423 /* For the toc section, we only mark as used if this
9424 entry itself isn't unused. */
9425 else if ((used[rel->r_offset >> 3]
9426 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9427 && !used[val >> 3])
9428 {
9429 /* Do all the relocs again, to catch reference
9430 chains. */
9431 repeat = 1;
9432 used[val >> 3] = 1;
9433 }
9434 }
9435 }
9436 while (repeat);
9437
9438 if (elf_section_data (sec)->relocs != relstart)
9439 free (relstart);
9440 }
9441
9442 /* Merge the used and skip arrays. Assume that TOC
9443 doublewords not appearing as either used or unused belong
9444 to an entry more than one doubleword in size. */
9445 for (drop = skip, keep = used, last = 0, some_unused = 0;
9446 drop < skip + (toc->size + 7) / 8;
9447 ++drop, ++keep)
9448 {
9449 if (*keep)
9450 {
9451 *drop &= ~ref_from_discarded;
9452 if ((*drop & can_optimize) != 0)
9453 some_unused = 1;
9454 last = 0;
9455 }
9456 else if ((*drop & ref_from_discarded) != 0)
9457 {
9458 some_unused = 1;
9459 last = ref_from_discarded;
9460 }
9461 else
9462 *drop = last;
9463 }
9464
9465 free (used);
9466
9467 if (some_unused)
9468 {
9469 bfd_byte *contents, *src;
9470 unsigned long off;
9471 Elf_Internal_Sym *sym;
9472 bfd_boolean local_toc_syms = FALSE;
9473
9474 /* Shuffle the toc contents, and at the same time convert the
9475 skip array from booleans into offsets. */
9476 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9477 goto error_ret;
9478
9479 elf_section_data (toc)->this_hdr.contents = contents;
9480
9481 for (src = contents, off = 0, drop = skip;
9482 src < contents + toc->size;
9483 src += 8, ++drop)
9484 {
9485 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9486 off += 8;
9487 else if (off != 0)
9488 {
9489 *drop = off;
9490 memcpy (src - off, src, 8);
9491 }
9492 }
9493 *drop = off;
9494 toc->rawsize = toc->size;
9495 toc->size = src - contents - off;
9496
9497 /* Adjust addends for relocs against the toc section sym,
9498 and optimize any accesses we can. */
9499 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9500 {
9501 if (sec->reloc_count == 0
9502 || discarded_section (sec))
9503 continue;
9504
9505 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9506 info->keep_memory);
9507 if (relstart == NULL)
9508 goto error_ret;
9509
9510 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9511 {
9512 enum elf_ppc64_reloc_type r_type;
9513 unsigned long r_symndx;
9514 asection *sym_sec;
9515 struct elf_link_hash_entry *h;
9516 bfd_vma val;
9517
9518 r_type = ELF64_R_TYPE (rel->r_info);
9519 switch (r_type)
9520 {
9521 default:
9522 continue;
9523
9524 case R_PPC64_TOC16:
9525 case R_PPC64_TOC16_LO:
9526 case R_PPC64_TOC16_HI:
9527 case R_PPC64_TOC16_HA:
9528 case R_PPC64_TOC16_DS:
9529 case R_PPC64_TOC16_LO_DS:
9530 case R_PPC64_ADDR64:
9531 break;
9532 }
9533
9534 r_symndx = ELF64_R_SYM (rel->r_info);
9535 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9536 r_symndx, ibfd))
9537 goto error_ret;
9538
9539 if (sym_sec != toc)
9540 continue;
9541
9542 if (h != NULL)
9543 val = h->root.u.def.value;
9544 else
9545 {
9546 val = sym->st_value;
9547 if (val != 0)
9548 local_toc_syms = TRUE;
9549 }
9550
9551 val += rel->r_addend;
9552
9553 if (val > toc->rawsize)
9554 val = toc->rawsize;
9555 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9556 continue;
9557 else if ((skip[val >> 3] & can_optimize) != 0)
9558 {
9559 Elf_Internal_Rela *tocrel
9560 = toc_relocs + (skip[val >> 3] >> 2);
9561 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9562
9563 switch (r_type)
9564 {
9565 case R_PPC64_TOC16_HA:
9566 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9567 break;
9568
9569 case R_PPC64_TOC16_LO_DS:
9570 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9571 break;
9572
9573 default:
9574 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9575 ppc_howto_init ();
9576 info->callbacks->einfo
9577 /* xgettext:c-format */
9578 (_("%H: %s references "
9579 "optimized away TOC entry\n"),
9580 ibfd, sec, rel->r_offset,
9581 ppc64_elf_howto_table[r_type]->name);
9582 bfd_set_error (bfd_error_bad_value);
9583 goto error_ret;
9584 }
9585 rel->r_addend = tocrel->r_addend;
9586 elf_section_data (sec)->relocs = relstart;
9587 continue;
9588 }
9589
9590 if (h != NULL || sym->st_value != 0)
9591 continue;
9592
9593 rel->r_addend -= skip[val >> 3];
9594 elf_section_data (sec)->relocs = relstart;
9595 }
9596
9597 if (elf_section_data (sec)->relocs != relstart)
9598 free (relstart);
9599 }
9600
9601 /* We shouldn't have local or global symbols defined in the TOC,
9602 but handle them anyway. */
9603 if (local_syms != NULL)
9604 for (sym = local_syms;
9605 sym < local_syms + symtab_hdr->sh_info;
9606 ++sym)
9607 if (sym->st_value != 0
9608 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9609 {
9610 unsigned long i;
9611
9612 if (sym->st_value > toc->rawsize)
9613 i = toc->rawsize >> 3;
9614 else
9615 i = sym->st_value >> 3;
9616
9617 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9618 {
9619 if (local_toc_syms)
9620 _bfd_error_handler
9621 (_("%s defined on removed toc entry"),
9622 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9623 do
9624 ++i;
9625 while ((skip[i] & (ref_from_discarded | can_optimize)));
9626 sym->st_value = (bfd_vma) i << 3;
9627 }
9628
9629 sym->st_value -= skip[i];
9630 symtab_hdr->contents = (unsigned char *) local_syms;
9631 }
9632
9633 /* Adjust any global syms defined in this toc input section. */
9634 if (toc_inf.global_toc_syms)
9635 {
9636 toc_inf.toc = toc;
9637 toc_inf.skip = skip;
9638 toc_inf.global_toc_syms = FALSE;
9639 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9640 &toc_inf);
9641 }
9642
9643 if (toc->reloc_count != 0)
9644 {
9645 Elf_Internal_Shdr *rel_hdr;
9646 Elf_Internal_Rela *wrel;
9647 bfd_size_type sz;
9648
9649 /* Remove unused toc relocs, and adjust those we keep. */
9650 if (toc_relocs == NULL)
9651 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9652 info->keep_memory);
9653 if (toc_relocs == NULL)
9654 goto error_ret;
9655
9656 wrel = toc_relocs;
9657 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9658 if ((skip[rel->r_offset >> 3]
9659 & (ref_from_discarded | can_optimize)) == 0)
9660 {
9661 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9662 wrel->r_info = rel->r_info;
9663 wrel->r_addend = rel->r_addend;
9664 ++wrel;
9665 }
9666 else if (!dec_dynrel_count (rel->r_info, toc, info,
9667 &local_syms, NULL, NULL))
9668 goto error_ret;
9669
9670 elf_section_data (toc)->relocs = toc_relocs;
9671 toc->reloc_count = wrel - toc_relocs;
9672 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9673 sz = rel_hdr->sh_entsize;
9674 rel_hdr->sh_size = toc->reloc_count * sz;
9675 }
9676 }
9677 else if (toc_relocs != NULL
9678 && elf_section_data (toc)->relocs != toc_relocs)
9679 free (toc_relocs);
9680
9681 if (local_syms != NULL
9682 && symtab_hdr->contents != (unsigned char *) local_syms)
9683 {
9684 if (!info->keep_memory)
9685 free (local_syms);
9686 else
9687 symtab_hdr->contents = (unsigned char *) local_syms;
9688 }
9689 free (skip);
9690 }
9691
9692 return TRUE;
9693 }
9694
9695 /* Return true iff input section I references the TOC using
9696 instructions limited to +/-32k offsets. */
9697
9698 bfd_boolean
9699 ppc64_elf_has_small_toc_reloc (asection *i)
9700 {
9701 return (is_ppc64_elf (i->owner)
9702 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9703 }
9704
9705 /* Allocate space for one GOT entry. */
9706
9707 static void
9708 allocate_got (struct elf_link_hash_entry *h,
9709 struct bfd_link_info *info,
9710 struct got_entry *gent)
9711 {
9712 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9713 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9714 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9715 ? 16 : 8);
9716 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9717 ? 2 : 1) * sizeof (Elf64_External_Rela);
9718 asection *got = ppc64_elf_tdata (gent->owner)->got;
9719
9720 gent->got.offset = got->size;
9721 got->size += entsize;
9722
9723 if (h->type == STT_GNU_IFUNC)
9724 {
9725 htab->elf.irelplt->size += rentsize;
9726 htab->got_reli_size += rentsize;
9727 }
9728 else if ((bfd_link_pic (info)
9729 || (htab->elf.dynamic_sections_created
9730 && h->dynindx != -1
9731 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9732 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9733 {
9734 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9735 relgot->size += rentsize;
9736 }
9737 }
9738
9739 /* This function merges got entries in the same toc group. */
9740
9741 static void
9742 merge_got_entries (struct got_entry **pent)
9743 {
9744 struct got_entry *ent, *ent2;
9745
9746 for (ent = *pent; ent != NULL; ent = ent->next)
9747 if (!ent->is_indirect)
9748 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9749 if (!ent2->is_indirect
9750 && ent2->addend == ent->addend
9751 && ent2->tls_type == ent->tls_type
9752 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9753 {
9754 ent2->is_indirect = TRUE;
9755 ent2->got.ent = ent;
9756 }
9757 }
9758
9759 /* If H is undefined, make it dynamic if that makes sense. */
9760
9761 static bfd_boolean
9762 ensure_undef_dynamic (struct bfd_link_info *info,
9763 struct elf_link_hash_entry *h)
9764 {
9765 struct elf_link_hash_table *htab = elf_hash_table (info);
9766
9767 if (htab->dynamic_sections_created
9768 && ((info->dynamic_undefined_weak != 0
9769 && h->root.type == bfd_link_hash_undefweak)
9770 || h->root.type == bfd_link_hash_undefined)
9771 && h->dynindx == -1
9772 && !h->forced_local
9773 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9774 return bfd_elf_link_record_dynamic_symbol (info, h);
9775 return TRUE;
9776 }
9777
9778 /* Allocate space in .plt, .got and associated reloc sections for
9779 dynamic relocs. */
9780
9781 static bfd_boolean
9782 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9783 {
9784 struct bfd_link_info *info;
9785 struct ppc_link_hash_table *htab;
9786 asection *s;
9787 struct ppc_link_hash_entry *eh;
9788 struct got_entry **pgent, *gent;
9789
9790 if (h->root.type == bfd_link_hash_indirect)
9791 return TRUE;
9792
9793 info = (struct bfd_link_info *) inf;
9794 htab = ppc_hash_table (info);
9795 if (htab == NULL)
9796 return FALSE;
9797
9798 eh = (struct ppc_link_hash_entry *) h;
9799 /* Run through the TLS GD got entries first if we're changing them
9800 to TPREL. */
9801 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9802 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9803 if (gent->got.refcount > 0
9804 && (gent->tls_type & TLS_GD) != 0)
9805 {
9806 /* This was a GD entry that has been converted to TPREL. If
9807 there happens to be a TPREL entry we can use that one. */
9808 struct got_entry *ent;
9809 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9810 if (ent->got.refcount > 0
9811 && (ent->tls_type & TLS_TPREL) != 0
9812 && ent->addend == gent->addend
9813 && ent->owner == gent->owner)
9814 {
9815 gent->got.refcount = 0;
9816 break;
9817 }
9818
9819 /* If not, then we'll be using our own TPREL entry. */
9820 if (gent->got.refcount != 0)
9821 gent->tls_type = TLS_TLS | TLS_TPREL;
9822 }
9823
9824 /* Remove any list entry that won't generate a word in the GOT before
9825 we call merge_got_entries. Otherwise we risk merging to empty
9826 entries. */
9827 pgent = &h->got.glist;
9828 while ((gent = *pgent) != NULL)
9829 if (gent->got.refcount > 0)
9830 {
9831 if ((gent->tls_type & TLS_LD) != 0
9832 && !h->def_dynamic)
9833 {
9834 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9835 *pgent = gent->next;
9836 }
9837 else
9838 pgent = &gent->next;
9839 }
9840 else
9841 *pgent = gent->next;
9842
9843 if (!htab->do_multi_toc)
9844 merge_got_entries (&h->got.glist);
9845
9846 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9847 if (!gent->is_indirect)
9848 {
9849 /* Make sure this symbol is output as a dynamic symbol. */
9850 if (!ensure_undef_dynamic (info, h))
9851 return FALSE;
9852
9853 if (!is_ppc64_elf (gent->owner))
9854 abort ();
9855
9856 allocate_got (h, info, gent);
9857 }
9858
9859 /* If no dynamic sections we can't have dynamic relocs, except for
9860 IFUNCs which are handled even in static executables. */
9861 if (!htab->elf.dynamic_sections_created
9862 && h->type != STT_GNU_IFUNC)
9863 eh->dyn_relocs = NULL;
9864
9865 /* Also discard relocs on undefined weak syms with non-default
9866 visibility, or when dynamic_undefined_weak says so. */
9867 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9868 eh->dyn_relocs = NULL;
9869
9870 if (eh->dyn_relocs != NULL)
9871 {
9872 struct elf_dyn_relocs *p, **pp;
9873
9874 /* In the shared -Bsymbolic case, discard space allocated for
9875 dynamic pc-relative relocs against symbols which turn out to
9876 be defined in regular objects. For the normal shared case,
9877 discard space for relocs that have become local due to symbol
9878 visibility changes. */
9879
9880 if (bfd_link_pic (info))
9881 {
9882 /* Relocs that use pc_count are those that appear on a call
9883 insn, or certain REL relocs (see must_be_dyn_reloc) that
9884 can be generated via assembly. We want calls to
9885 protected symbols to resolve directly to the function
9886 rather than going via the plt. If people want function
9887 pointer comparisons to work as expected then they should
9888 avoid writing weird assembly. */
9889 if (SYMBOL_CALLS_LOCAL (info, h))
9890 {
9891 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9892 {
9893 p->count -= p->pc_count;
9894 p->pc_count = 0;
9895 if (p->count == 0)
9896 *pp = p->next;
9897 else
9898 pp = &p->next;
9899 }
9900 }
9901
9902 if (eh->dyn_relocs != NULL)
9903 {
9904 /* Make sure this symbol is output as a dynamic symbol. */
9905 if (!ensure_undef_dynamic (info, h))
9906 return FALSE;
9907 }
9908 }
9909 else if (h->type == STT_GNU_IFUNC)
9910 {
9911 /* A plt entry is always created when making direct calls to
9912 an ifunc, even when building a static executable, but
9913 that doesn't cover all cases. We may have only an ifunc
9914 initialised function pointer for a given ifunc symbol.
9915
9916 For ELFv2, dynamic relocations are not required when
9917 generating a global entry PLT stub. */
9918 if (abiversion (info->output_bfd) >= 2)
9919 {
9920 if (global_entry_stub (h))
9921 eh->dyn_relocs = NULL;
9922 }
9923
9924 /* For ELFv1 we have function descriptors. Descriptors need
9925 to be treated like PLT entries and thus have dynamic
9926 relocations. One exception is when the function
9927 descriptor is copied into .dynbss (which should only
9928 happen with ancient versions of gcc). */
9929 else if (h->needs_copy)
9930 eh->dyn_relocs = NULL;
9931 }
9932 else if (ELIMINATE_COPY_RELOCS)
9933 {
9934 /* For the non-pic case, discard space for relocs against
9935 symbols which turn out to need copy relocs or are not
9936 dynamic. */
9937 if (!h->non_got_ref
9938 && !h->def_regular)
9939 {
9940 /* Make sure this symbol is output as a dynamic symbol. */
9941 if (!ensure_undef_dynamic (info, h))
9942 return FALSE;
9943
9944 if (h->dynindx == -1)
9945 eh->dyn_relocs = NULL;
9946 }
9947 else
9948 eh->dyn_relocs = NULL;
9949 }
9950
9951 /* Finally, allocate space. */
9952 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9953 {
9954 asection *sreloc = elf_section_data (p->sec)->sreloc;
9955 if (eh->elf.type == STT_GNU_IFUNC)
9956 sreloc = htab->elf.irelplt;
9957 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9958 }
9959 }
9960
9961 if ((htab->elf.dynamic_sections_created
9962 && h->dynindx != -1)
9963 || h->type == STT_GNU_IFUNC)
9964 {
9965 struct plt_entry *pent;
9966 bfd_boolean doneone = FALSE;
9967 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9968 if (pent->plt.refcount > 0)
9969 {
9970 if (!htab->elf.dynamic_sections_created
9971 || h->dynindx == -1)
9972 {
9973 s = htab->elf.iplt;
9974 pent->plt.offset = s->size;
9975 s->size += PLT_ENTRY_SIZE (htab);
9976 s = htab->elf.irelplt;
9977 }
9978 else
9979 {
9980 /* If this is the first .plt entry, make room for the special
9981 first entry. */
9982 s = htab->elf.splt;
9983 if (s->size == 0)
9984 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9985
9986 pent->plt.offset = s->size;
9987
9988 /* Make room for this entry. */
9989 s->size += PLT_ENTRY_SIZE (htab);
9990
9991 /* Make room for the .glink code. */
9992 s = htab->glink;
9993 if (s->size == 0)
9994 s->size += GLINK_CALL_STUB_SIZE;
9995 if (htab->opd_abi)
9996 {
9997 /* We need bigger stubs past index 32767. */
9998 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9999 s->size += 4;
10000 s->size += 2*4;
10001 }
10002 else
10003 s->size += 4;
10004
10005 /* We also need to make an entry in the .rela.plt section. */
10006 s = htab->elf.srelplt;
10007 }
10008 s->size += sizeof (Elf64_External_Rela);
10009 doneone = TRUE;
10010 }
10011 else
10012 pent->plt.offset = (bfd_vma) -1;
10013 if (!doneone)
10014 {
10015 h->plt.plist = NULL;
10016 h->needs_plt = 0;
10017 }
10018 }
10019 else
10020 {
10021 h->plt.plist = NULL;
10022 h->needs_plt = 0;
10023 }
10024
10025 return TRUE;
10026 }
10027
10028 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
10029 to set up space for global entry stubs. These are put in glink,
10030 after the branch table. */
10031
10032 static bfd_boolean
10033 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
10034 {
10035 struct bfd_link_info *info;
10036 struct ppc_link_hash_table *htab;
10037 struct plt_entry *pent;
10038 asection *s;
10039
10040 if (h->root.type == bfd_link_hash_indirect)
10041 return TRUE;
10042
10043 if (!h->pointer_equality_needed)
10044 return TRUE;
10045
10046 if (h->def_regular)
10047 return TRUE;
10048
10049 info = inf;
10050 htab = ppc_hash_table (info);
10051 if (htab == NULL)
10052 return FALSE;
10053
10054 s = htab->glink;
10055 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10056 if (pent->plt.offset != (bfd_vma) -1
10057 && pent->addend == 0)
10058 {
10059 /* For ELFv2, if this symbol is not defined in a regular file
10060 and we are not generating a shared library or pie, then we
10061 need to define the symbol in the executable on a call stub.
10062 This is to avoid text relocations. */
10063 s->size = (s->size + 15) & -16;
10064 h->root.type = bfd_link_hash_defined;
10065 h->root.u.def.section = s;
10066 h->root.u.def.value = s->size;
10067 s->size += 16;
10068 break;
10069 }
10070 return TRUE;
10071 }
10072
10073 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10074 read-only sections. */
10075
10076 static bfd_boolean
10077 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10078 {
10079 if (h->root.type == bfd_link_hash_indirect)
10080 return TRUE;
10081
10082 if (readonly_dynrelocs (h))
10083 {
10084 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10085
10086 /* Not an error, just cut short the traversal. */
10087 return FALSE;
10088 }
10089 return TRUE;
10090 }
10091
10092 /* Set the sizes of the dynamic sections. */
10093
10094 static bfd_boolean
10095 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10096 struct bfd_link_info *info)
10097 {
10098 struct ppc_link_hash_table *htab;
10099 bfd *dynobj;
10100 asection *s;
10101 bfd_boolean relocs;
10102 bfd *ibfd;
10103 struct got_entry *first_tlsld;
10104
10105 htab = ppc_hash_table (info);
10106 if (htab == NULL)
10107 return FALSE;
10108
10109 dynobj = htab->elf.dynobj;
10110 if (dynobj == NULL)
10111 abort ();
10112
10113 if (htab->elf.dynamic_sections_created)
10114 {
10115 /* Set the contents of the .interp section to the interpreter. */
10116 if (bfd_link_executable (info) && !info->nointerp)
10117 {
10118 s = bfd_get_linker_section (dynobj, ".interp");
10119 if (s == NULL)
10120 abort ();
10121 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10122 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10123 }
10124 }
10125
10126 /* Set up .got offsets for local syms, and space for local dynamic
10127 relocs. */
10128 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10129 {
10130 struct got_entry **lgot_ents;
10131 struct got_entry **end_lgot_ents;
10132 struct plt_entry **local_plt;
10133 struct plt_entry **end_local_plt;
10134 unsigned char *lgot_masks;
10135 bfd_size_type locsymcount;
10136 Elf_Internal_Shdr *symtab_hdr;
10137
10138 if (!is_ppc64_elf (ibfd))
10139 continue;
10140
10141 for (s = ibfd->sections; s != NULL; s = s->next)
10142 {
10143 struct ppc_dyn_relocs *p;
10144
10145 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10146 {
10147 if (!bfd_is_abs_section (p->sec)
10148 && bfd_is_abs_section (p->sec->output_section))
10149 {
10150 /* Input section has been discarded, either because
10151 it is a copy of a linkonce section or due to
10152 linker script /DISCARD/, so we'll be discarding
10153 the relocs too. */
10154 }
10155 else if (p->count != 0)
10156 {
10157 asection *srel = elf_section_data (p->sec)->sreloc;
10158 if (p->ifunc)
10159 srel = htab->elf.irelplt;
10160 srel->size += p->count * sizeof (Elf64_External_Rela);
10161 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10162 info->flags |= DF_TEXTREL;
10163 }
10164 }
10165 }
10166
10167 lgot_ents = elf_local_got_ents (ibfd);
10168 if (!lgot_ents)
10169 continue;
10170
10171 symtab_hdr = &elf_symtab_hdr (ibfd);
10172 locsymcount = symtab_hdr->sh_info;
10173 end_lgot_ents = lgot_ents + locsymcount;
10174 local_plt = (struct plt_entry **) end_lgot_ents;
10175 end_local_plt = local_plt + locsymcount;
10176 lgot_masks = (unsigned char *) end_local_plt;
10177 s = ppc64_elf_tdata (ibfd)->got;
10178 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10179 {
10180 struct got_entry **pent, *ent;
10181
10182 pent = lgot_ents;
10183 while ((ent = *pent) != NULL)
10184 if (ent->got.refcount > 0)
10185 {
10186 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10187 {
10188 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10189 *pent = ent->next;
10190 }
10191 else
10192 {
10193 unsigned int ent_size = 8;
10194 unsigned int rel_size = sizeof (Elf64_External_Rela);
10195
10196 ent->got.offset = s->size;
10197 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10198 {
10199 ent_size *= 2;
10200 rel_size *= 2;
10201 }
10202 s->size += ent_size;
10203 if ((*lgot_masks & PLT_IFUNC) != 0)
10204 {
10205 htab->elf.irelplt->size += rel_size;
10206 htab->got_reli_size += rel_size;
10207 }
10208 else if (bfd_link_pic (info))
10209 {
10210 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10211 srel->size += rel_size;
10212 }
10213 pent = &ent->next;
10214 }
10215 }
10216 else
10217 *pent = ent->next;
10218 }
10219
10220 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10221 for (; local_plt < end_local_plt; ++local_plt)
10222 {
10223 struct plt_entry *ent;
10224
10225 for (ent = *local_plt; ent != NULL; ent = ent->next)
10226 if (ent->plt.refcount > 0)
10227 {
10228 s = htab->elf.iplt;
10229 ent->plt.offset = s->size;
10230 s->size += PLT_ENTRY_SIZE (htab);
10231
10232 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10233 }
10234 else
10235 ent->plt.offset = (bfd_vma) -1;
10236 }
10237 }
10238
10239 /* Allocate global sym .plt and .got entries, and space for global
10240 sym dynamic relocs. */
10241 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10242 /* Stash the end of glink branch table. */
10243 if (htab->glink != NULL)
10244 htab->glink->rawsize = htab->glink->size;
10245
10246 if (!htab->opd_abi && !bfd_link_pic (info))
10247 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10248
10249 first_tlsld = NULL;
10250 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10251 {
10252 struct got_entry *ent;
10253
10254 if (!is_ppc64_elf (ibfd))
10255 continue;
10256
10257 ent = ppc64_tlsld_got (ibfd);
10258 if (ent->got.refcount > 0)
10259 {
10260 if (!htab->do_multi_toc && first_tlsld != NULL)
10261 {
10262 ent->is_indirect = TRUE;
10263 ent->got.ent = first_tlsld;
10264 }
10265 else
10266 {
10267 if (first_tlsld == NULL)
10268 first_tlsld = ent;
10269 s = ppc64_elf_tdata (ibfd)->got;
10270 ent->got.offset = s->size;
10271 ent->owner = ibfd;
10272 s->size += 16;
10273 if (bfd_link_pic (info))
10274 {
10275 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10276 srel->size += sizeof (Elf64_External_Rela);
10277 }
10278 }
10279 }
10280 else
10281 ent->got.offset = (bfd_vma) -1;
10282 }
10283
10284 /* We now have determined the sizes of the various dynamic sections.
10285 Allocate memory for them. */
10286 relocs = FALSE;
10287 for (s = dynobj->sections; s != NULL; s = s->next)
10288 {
10289 if ((s->flags & SEC_LINKER_CREATED) == 0)
10290 continue;
10291
10292 if (s == htab->brlt || s == htab->relbrlt)
10293 /* These haven't been allocated yet; don't strip. */
10294 continue;
10295 else if (s == htab->elf.sgot
10296 || s == htab->elf.splt
10297 || s == htab->elf.iplt
10298 || s == htab->glink
10299 || s == htab->elf.sdynbss
10300 || s == htab->elf.sdynrelro)
10301 {
10302 /* Strip this section if we don't need it; see the
10303 comment below. */
10304 }
10305 else if (s == htab->glink_eh_frame)
10306 {
10307 if (!bfd_is_abs_section (s->output_section))
10308 /* Not sized yet. */
10309 continue;
10310 }
10311 else if (CONST_STRNEQ (s->name, ".rela"))
10312 {
10313 if (s->size != 0)
10314 {
10315 if (s != htab->elf.srelplt)
10316 relocs = TRUE;
10317
10318 /* We use the reloc_count field as a counter if we need
10319 to copy relocs into the output file. */
10320 s->reloc_count = 0;
10321 }
10322 }
10323 else
10324 {
10325 /* It's not one of our sections, so don't allocate space. */
10326 continue;
10327 }
10328
10329 if (s->size == 0)
10330 {
10331 /* If we don't need this section, strip it from the
10332 output file. This is mostly to handle .rela.bss and
10333 .rela.plt. We must create both sections in
10334 create_dynamic_sections, because they must be created
10335 before the linker maps input sections to output
10336 sections. The linker does that before
10337 adjust_dynamic_symbol is called, and it is that
10338 function which decides whether anything needs to go
10339 into these sections. */
10340 s->flags |= SEC_EXCLUDE;
10341 continue;
10342 }
10343
10344 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10345 continue;
10346
10347 /* Allocate memory for the section contents. We use bfd_zalloc
10348 here in case unused entries are not reclaimed before the
10349 section's contents are written out. This should not happen,
10350 but this way if it does we get a R_PPC64_NONE reloc in .rela
10351 sections instead of garbage.
10352 We also rely on the section contents being zero when writing
10353 the GOT and .dynrelro. */
10354 s->contents = bfd_zalloc (dynobj, s->size);
10355 if (s->contents == NULL)
10356 return FALSE;
10357 }
10358
10359 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10360 {
10361 if (!is_ppc64_elf (ibfd))
10362 continue;
10363
10364 s = ppc64_elf_tdata (ibfd)->got;
10365 if (s != NULL && s != htab->elf.sgot)
10366 {
10367 if (s->size == 0)
10368 s->flags |= SEC_EXCLUDE;
10369 else
10370 {
10371 s->contents = bfd_zalloc (ibfd, s->size);
10372 if (s->contents == NULL)
10373 return FALSE;
10374 }
10375 }
10376 s = ppc64_elf_tdata (ibfd)->relgot;
10377 if (s != NULL)
10378 {
10379 if (s->size == 0)
10380 s->flags |= SEC_EXCLUDE;
10381 else
10382 {
10383 s->contents = bfd_zalloc (ibfd, s->size);
10384 if (s->contents == NULL)
10385 return FALSE;
10386 relocs = TRUE;
10387 s->reloc_count = 0;
10388 }
10389 }
10390 }
10391
10392 if (htab->elf.dynamic_sections_created)
10393 {
10394 bfd_boolean tls_opt;
10395
10396 /* Add some entries to the .dynamic section. We fill in the
10397 values later, in ppc64_elf_finish_dynamic_sections, but we
10398 must add the entries now so that we get the correct size for
10399 the .dynamic section. The DT_DEBUG entry is filled in by the
10400 dynamic linker and used by the debugger. */
10401 #define add_dynamic_entry(TAG, VAL) \
10402 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10403
10404 if (bfd_link_executable (info))
10405 {
10406 if (!add_dynamic_entry (DT_DEBUG, 0))
10407 return FALSE;
10408 }
10409
10410 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10411 {
10412 if (!add_dynamic_entry (DT_PLTGOT, 0)
10413 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10414 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10415 || !add_dynamic_entry (DT_JMPREL, 0)
10416 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10417 return FALSE;
10418 }
10419
10420 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10421 {
10422 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10423 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10424 return FALSE;
10425 }
10426
10427 tls_opt = (htab->params->tls_get_addr_opt
10428 && htab->tls_get_addr_fd != NULL
10429 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10430 if (tls_opt || !htab->opd_abi)
10431 {
10432 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10433 return FALSE;
10434 }
10435
10436 if (relocs)
10437 {
10438 if (!add_dynamic_entry (DT_RELA, 0)
10439 || !add_dynamic_entry (DT_RELASZ, 0)
10440 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10441 return FALSE;
10442
10443 /* If any dynamic relocs apply to a read-only section,
10444 then we need a DT_TEXTREL entry. */
10445 if ((info->flags & DF_TEXTREL) == 0)
10446 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10447
10448 if ((info->flags & DF_TEXTREL) != 0)
10449 {
10450 if (!add_dynamic_entry (DT_TEXTREL, 0))
10451 return FALSE;
10452 }
10453 }
10454 }
10455 #undef add_dynamic_entry
10456
10457 return TRUE;
10458 }
10459
10460 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10461
10462 static bfd_boolean
10463 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10464 {
10465 if (h->plt.plist != NULL
10466 && !h->def_regular
10467 && !h->pointer_equality_needed)
10468 return FALSE;
10469
10470 return _bfd_elf_hash_symbol (h);
10471 }
10472
10473 /* Determine the type of stub needed, if any, for a call. */
10474
10475 static inline enum ppc_stub_type
10476 ppc_type_of_stub (asection *input_sec,
10477 const Elf_Internal_Rela *rel,
10478 struct ppc_link_hash_entry **hash,
10479 struct plt_entry **plt_ent,
10480 bfd_vma destination,
10481 unsigned long local_off)
10482 {
10483 struct ppc_link_hash_entry *h = *hash;
10484 bfd_vma location;
10485 bfd_vma branch_offset;
10486 bfd_vma max_branch_offset;
10487 enum elf_ppc64_reloc_type r_type;
10488
10489 if (h != NULL)
10490 {
10491 struct plt_entry *ent;
10492 struct ppc_link_hash_entry *fdh = h;
10493 if (h->oh != NULL
10494 && h->oh->is_func_descriptor)
10495 {
10496 fdh = ppc_follow_link (h->oh);
10497 *hash = fdh;
10498 }
10499
10500 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10501 if (ent->addend == rel->r_addend
10502 && ent->plt.offset != (bfd_vma) -1)
10503 {
10504 *plt_ent = ent;
10505 return ppc_stub_plt_call;
10506 }
10507
10508 /* Here, we know we don't have a plt entry. If we don't have a
10509 either a defined function descriptor or a defined entry symbol
10510 in a regular object file, then it is pointless trying to make
10511 any other type of stub. */
10512 if (!is_static_defined (&fdh->elf)
10513 && !is_static_defined (&h->elf))
10514 return ppc_stub_none;
10515 }
10516 else if (elf_local_got_ents (input_sec->owner) != NULL)
10517 {
10518 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10519 struct plt_entry **local_plt = (struct plt_entry **)
10520 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10521 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10522
10523 if (local_plt[r_symndx] != NULL)
10524 {
10525 struct plt_entry *ent;
10526
10527 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10528 if (ent->addend == rel->r_addend
10529 && ent->plt.offset != (bfd_vma) -1)
10530 {
10531 *plt_ent = ent;
10532 return ppc_stub_plt_call;
10533 }
10534 }
10535 }
10536
10537 /* Determine where the call point is. */
10538 location = (input_sec->output_offset
10539 + input_sec->output_section->vma
10540 + rel->r_offset);
10541
10542 branch_offset = destination - location;
10543 r_type = ELF64_R_TYPE (rel->r_info);
10544
10545 /* Determine if a long branch stub is needed. */
10546 max_branch_offset = 1 << 25;
10547 if (r_type != R_PPC64_REL24)
10548 max_branch_offset = 1 << 15;
10549
10550 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10551 /* We need a stub. Figure out whether a long_branch or plt_branch
10552 is needed later. */
10553 return ppc_stub_long_branch;
10554
10555 return ppc_stub_none;
10556 }
10557
10558 /* With power7 weakly ordered memory model, it is possible for ld.so
10559 to update a plt entry in one thread and have another thread see a
10560 stale zero toc entry. To avoid this we need some sort of acquire
10561 barrier in the call stub. One solution is to make the load of the
10562 toc word seem to appear to depend on the load of the function entry
10563 word. Another solution is to test for r2 being zero, and branch to
10564 the appropriate glink entry if so.
10565
10566 . fake dep barrier compare
10567 . ld 12,xxx(2) ld 12,xxx(2)
10568 . mtctr 12 mtctr 12
10569 . xor 11,12,12 ld 2,xxx+8(2)
10570 . add 2,2,11 cmpldi 2,0
10571 . ld 2,xxx+8(2) bnectr+
10572 . bctr b <glink_entry>
10573
10574 The solution involving the compare turns out to be faster, so
10575 that's what we use unless the branch won't reach. */
10576
10577 #define ALWAYS_USE_FAKE_DEP 0
10578 #define ALWAYS_EMIT_R2SAVE 0
10579
10580 #define PPC_LO(v) ((v) & 0xffff)
10581 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10582 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10583
10584 static inline unsigned int
10585 plt_stub_size (struct ppc_link_hash_table *htab,
10586 struct ppc_stub_hash_entry *stub_entry,
10587 bfd_vma off)
10588 {
10589 unsigned size = 12;
10590
10591 if (ALWAYS_EMIT_R2SAVE
10592 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10593 size += 4;
10594 if (PPC_HA (off) != 0)
10595 size += 4;
10596 if (htab->opd_abi)
10597 {
10598 size += 4;
10599 if (htab->params->plt_static_chain)
10600 size += 4;
10601 if (htab->params->plt_thread_safe
10602 && htab->elf.dynamic_sections_created
10603 && stub_entry->h != NULL
10604 && stub_entry->h->elf.dynindx != -1)
10605 size += 8;
10606 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10607 size += 4;
10608 }
10609 if (stub_entry->h != NULL
10610 && (stub_entry->h == htab->tls_get_addr_fd
10611 || stub_entry->h == htab->tls_get_addr)
10612 && htab->params->tls_get_addr_opt)
10613 {
10614 size += 7 * 4;
10615 if (ALWAYS_EMIT_R2SAVE
10616 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10617 size += 6 * 4;
10618 }
10619 return size;
10620 }
10621
10622 /* Depending on the sign of plt_stub_align:
10623 If positive, return the padding to align to a 2**plt_stub_align
10624 boundary.
10625 If negative, if this stub would cross fewer 2**plt_stub_align
10626 boundaries if we align, then return the padding needed to do so. */
10627
10628 static inline unsigned int
10629 plt_stub_pad (struct ppc_link_hash_table *htab,
10630 struct ppc_stub_hash_entry *stub_entry,
10631 bfd_vma plt_off)
10632 {
10633 int stub_align;
10634 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10635 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10636
10637 if (htab->params->plt_stub_align >= 0)
10638 {
10639 stub_align = 1 << htab->params->plt_stub_align;
10640 if ((stub_off & (stub_align - 1)) != 0)
10641 return stub_align - (stub_off & (stub_align - 1));
10642 return 0;
10643 }
10644
10645 stub_align = 1 << -htab->params->plt_stub_align;
10646 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10647 > ((stub_size - 1) & -stub_align))
10648 return stub_align - (stub_off & (stub_align - 1));
10649 return 0;
10650 }
10651
10652 /* Build a .plt call stub. */
10653
10654 static inline bfd_byte *
10655 build_plt_stub (struct ppc_link_hash_table *htab,
10656 struct ppc_stub_hash_entry *stub_entry,
10657 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10658 {
10659 bfd *obfd = htab->params->stub_bfd;
10660 bfd_boolean plt_load_toc = htab->opd_abi;
10661 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10662 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10663 && htab->elf.dynamic_sections_created
10664 && stub_entry->h != NULL
10665 && stub_entry->h->elf.dynindx != -1);
10666 bfd_boolean use_fake_dep = plt_thread_safe;
10667 bfd_vma cmp_branch_off = 0;
10668
10669 if (!ALWAYS_USE_FAKE_DEP
10670 && plt_load_toc
10671 && plt_thread_safe
10672 && !((stub_entry->h == htab->tls_get_addr_fd
10673 || stub_entry->h == htab->tls_get_addr)
10674 && htab->params->tls_get_addr_opt))
10675 {
10676 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10677 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10678 / PLT_ENTRY_SIZE (htab));
10679 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10680 bfd_vma to, from;
10681
10682 if (pltindex > 32768)
10683 glinkoff += (pltindex - 32768) * 4;
10684 to = (glinkoff
10685 + htab->glink->output_offset
10686 + htab->glink->output_section->vma);
10687 from = (p - stub_entry->group->stub_sec->contents
10688 + 4 * (ALWAYS_EMIT_R2SAVE
10689 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10690 + 4 * (PPC_HA (offset) != 0)
10691 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10692 != PPC_HA (offset))
10693 + 4 * (plt_static_chain != 0)
10694 + 20
10695 + stub_entry->group->stub_sec->output_offset
10696 + stub_entry->group->stub_sec->output_section->vma);
10697 cmp_branch_off = to - from;
10698 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10699 }
10700
10701 if (PPC_HA (offset) != 0)
10702 {
10703 if (r != NULL)
10704 {
10705 if (ALWAYS_EMIT_R2SAVE
10706 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10707 r[0].r_offset += 4;
10708 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10709 r[1].r_offset = r[0].r_offset + 4;
10710 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10711 r[1].r_addend = r[0].r_addend;
10712 if (plt_load_toc)
10713 {
10714 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10715 {
10716 r[2].r_offset = r[1].r_offset + 4;
10717 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10718 r[2].r_addend = r[0].r_addend;
10719 }
10720 else
10721 {
10722 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10723 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10724 r[2].r_addend = r[0].r_addend + 8;
10725 if (plt_static_chain)
10726 {
10727 r[3].r_offset = r[2].r_offset + 4;
10728 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10729 r[3].r_addend = r[0].r_addend + 16;
10730 }
10731 }
10732 }
10733 }
10734 if (ALWAYS_EMIT_R2SAVE
10735 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10736 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10737 if (plt_load_toc)
10738 {
10739 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10740 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10741 }
10742 else
10743 {
10744 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10745 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10746 }
10747 if (plt_load_toc
10748 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10749 {
10750 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10751 offset = 0;
10752 }
10753 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10754 if (plt_load_toc)
10755 {
10756 if (use_fake_dep)
10757 {
10758 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10759 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10760 }
10761 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10762 if (plt_static_chain)
10763 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10764 }
10765 }
10766 else
10767 {
10768 if (r != NULL)
10769 {
10770 if (ALWAYS_EMIT_R2SAVE
10771 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10772 r[0].r_offset += 4;
10773 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10774 if (plt_load_toc)
10775 {
10776 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10777 {
10778 r[1].r_offset = r[0].r_offset + 4;
10779 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10780 r[1].r_addend = r[0].r_addend;
10781 }
10782 else
10783 {
10784 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10785 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10786 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10787 if (plt_static_chain)
10788 {
10789 r[2].r_offset = r[1].r_offset + 4;
10790 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10791 r[2].r_addend = r[0].r_addend + 8;
10792 }
10793 }
10794 }
10795 }
10796 if (ALWAYS_EMIT_R2SAVE
10797 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10798 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10799 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10800 if (plt_load_toc
10801 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10802 {
10803 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10804 offset = 0;
10805 }
10806 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10807 if (plt_load_toc)
10808 {
10809 if (use_fake_dep)
10810 {
10811 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10812 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10813 }
10814 if (plt_static_chain)
10815 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10816 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10817 }
10818 }
10819 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10820 {
10821 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10822 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10823 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10824 }
10825 else
10826 bfd_put_32 (obfd, BCTR, p), p += 4;
10827 return p;
10828 }
10829
10830 /* Build a special .plt call stub for __tls_get_addr. */
10831
10832 #define LD_R11_0R3 0xe9630000
10833 #define LD_R12_0R3 0xe9830000
10834 #define MR_R0_R3 0x7c601b78
10835 #define CMPDI_R11_0 0x2c2b0000
10836 #define ADD_R3_R12_R13 0x7c6c6a14
10837 #define BEQLR 0x4d820020
10838 #define MR_R3_R0 0x7c030378
10839 #define STD_R11_0R1 0xf9610000
10840 #define BCTRL 0x4e800421
10841 #define LD_R11_0R1 0xe9610000
10842 #define MTLR_R11 0x7d6803a6
10843
10844 static inline bfd_byte *
10845 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10846 struct ppc_stub_hash_entry *stub_entry,
10847 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10848 {
10849 bfd *obfd = htab->params->stub_bfd;
10850
10851 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10852 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10853 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10854 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10855 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10856 bfd_put_32 (obfd, BEQLR, p), p += 4;
10857 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10858 if (r != NULL)
10859 r[0].r_offset += 7 * 4;
10860 if (!ALWAYS_EMIT_R2SAVE
10861 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10862 return build_plt_stub (htab, stub_entry, p, offset, r);
10863
10864 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10865 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10866
10867 if (r != NULL)
10868 r[0].r_offset += 2 * 4;
10869 p = build_plt_stub (htab, stub_entry, p, offset, r);
10870 bfd_put_32 (obfd, BCTRL, p - 4);
10871
10872 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10873 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10874 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10875 bfd_put_32 (obfd, BLR, p), p += 4;
10876
10877 return p;
10878 }
10879
10880 static Elf_Internal_Rela *
10881 get_relocs (asection *sec, int count)
10882 {
10883 Elf_Internal_Rela *relocs;
10884 struct bfd_elf_section_data *elfsec_data;
10885
10886 elfsec_data = elf_section_data (sec);
10887 relocs = elfsec_data->relocs;
10888 if (relocs == NULL)
10889 {
10890 bfd_size_type relsize;
10891 relsize = sec->reloc_count * sizeof (*relocs);
10892 relocs = bfd_alloc (sec->owner, relsize);
10893 if (relocs == NULL)
10894 return NULL;
10895 elfsec_data->relocs = relocs;
10896 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10897 sizeof (Elf_Internal_Shdr));
10898 if (elfsec_data->rela.hdr == NULL)
10899 return NULL;
10900 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10901 * sizeof (Elf64_External_Rela));
10902 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10903 sec->reloc_count = 0;
10904 }
10905 relocs += sec->reloc_count;
10906 sec->reloc_count += count;
10907 return relocs;
10908 }
10909
10910 static bfd_vma
10911 get_r2off (struct bfd_link_info *info,
10912 struct ppc_stub_hash_entry *stub_entry)
10913 {
10914 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10915 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10916
10917 if (r2off == 0)
10918 {
10919 /* Support linking -R objects. Get the toc pointer from the
10920 opd entry. */
10921 char buf[8];
10922 if (!htab->opd_abi)
10923 return r2off;
10924 asection *opd = stub_entry->h->elf.root.u.def.section;
10925 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10926
10927 if (strcmp (opd->name, ".opd") != 0
10928 || opd->reloc_count != 0)
10929 {
10930 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10931 stub_entry->h->elf.root.root.string);
10932 bfd_set_error (bfd_error_bad_value);
10933 return (bfd_vma) -1;
10934 }
10935 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10936 return (bfd_vma) -1;
10937 r2off = bfd_get_64 (opd->owner, buf);
10938 r2off -= elf_gp (info->output_bfd);
10939 }
10940 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10941 return r2off;
10942 }
10943
10944 static bfd_boolean
10945 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10946 {
10947 struct ppc_stub_hash_entry *stub_entry;
10948 struct ppc_branch_hash_entry *br_entry;
10949 struct bfd_link_info *info;
10950 struct ppc_link_hash_table *htab;
10951 bfd_byte *loc;
10952 bfd_byte *p;
10953 bfd_vma dest, off;
10954 int size;
10955 Elf_Internal_Rela *r;
10956 asection *plt;
10957
10958 /* Massage our args to the form they really have. */
10959 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10960 info = in_arg;
10961
10962 htab = ppc_hash_table (info);
10963 if (htab == NULL)
10964 return FALSE;
10965
10966 /* Make a note of the offset within the stubs for this entry. */
10967 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10968 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10969
10970 htab->stub_count[stub_entry->stub_type - 1] += 1;
10971 switch (stub_entry->stub_type)
10972 {
10973 case ppc_stub_long_branch:
10974 case ppc_stub_long_branch_r2off:
10975 /* Branches are relative. This is where we are going to. */
10976 dest = (stub_entry->target_value
10977 + stub_entry->target_section->output_offset
10978 + stub_entry->target_section->output_section->vma);
10979 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10980 off = dest;
10981
10982 /* And this is where we are coming from. */
10983 off -= (stub_entry->stub_offset
10984 + stub_entry->group->stub_sec->output_offset
10985 + stub_entry->group->stub_sec->output_section->vma);
10986
10987 size = 4;
10988 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10989 {
10990 bfd_vma r2off = get_r2off (info, stub_entry);
10991
10992 if (r2off == (bfd_vma) -1)
10993 {
10994 htab->stub_error = TRUE;
10995 return FALSE;
10996 }
10997 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10998 loc += 4;
10999 size = 8;
11000 if (PPC_HA (r2off) != 0)
11001 {
11002 bfd_put_32 (htab->params->stub_bfd,
11003 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11004 loc += 4;
11005 size += 4;
11006 }
11007 if (PPC_LO (r2off) != 0)
11008 {
11009 bfd_put_32 (htab->params->stub_bfd,
11010 ADDI_R2_R2 | PPC_LO (r2off), loc);
11011 loc += 4;
11012 size += 4;
11013 }
11014 off -= size - 4;
11015 }
11016 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
11017
11018 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
11019 {
11020 info->callbacks->einfo
11021 (_("%P: long branch stub `%s' offset overflow\n"),
11022 stub_entry->root.string);
11023 htab->stub_error = TRUE;
11024 return FALSE;
11025 }
11026
11027 if (info->emitrelocations)
11028 {
11029 r = get_relocs (stub_entry->group->stub_sec, 1);
11030 if (r == NULL)
11031 return FALSE;
11032 r->r_offset = loc - stub_entry->group->stub_sec->contents;
11033 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
11034 r->r_addend = dest;
11035 if (stub_entry->h != NULL)
11036 {
11037 struct elf_link_hash_entry **hashes;
11038 unsigned long symndx;
11039 struct ppc_link_hash_entry *h;
11040
11041 hashes = elf_sym_hashes (htab->params->stub_bfd);
11042 if (hashes == NULL)
11043 {
11044 bfd_size_type hsize;
11045
11046 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
11047 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
11048 if (hashes == NULL)
11049 return FALSE;
11050 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11051 htab->stub_globals = 1;
11052 }
11053 symndx = htab->stub_globals++;
11054 h = stub_entry->h;
11055 hashes[symndx] = &h->elf;
11056 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11057 if (h->oh != NULL && h->oh->is_func)
11058 h = ppc_follow_link (h->oh);
11059 if (h->elf.root.u.def.section != stub_entry->target_section)
11060 /* H is an opd symbol. The addend must be zero. */
11061 r->r_addend = 0;
11062 else
11063 {
11064 off = (h->elf.root.u.def.value
11065 + h->elf.root.u.def.section->output_offset
11066 + h->elf.root.u.def.section->output_section->vma);
11067 r->r_addend -= off;
11068 }
11069 }
11070 }
11071 break;
11072
11073 case ppc_stub_plt_branch:
11074 case ppc_stub_plt_branch_r2off:
11075 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11076 stub_entry->root.string + 9,
11077 FALSE, FALSE);
11078 if (br_entry == NULL)
11079 {
11080 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
11081 stub_entry->root.string);
11082 htab->stub_error = TRUE;
11083 return FALSE;
11084 }
11085
11086 dest = (stub_entry->target_value
11087 + stub_entry->target_section->output_offset
11088 + stub_entry->target_section->output_section->vma);
11089 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11090 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11091
11092 bfd_put_64 (htab->brlt->owner, dest,
11093 htab->brlt->contents + br_entry->offset);
11094
11095 if (br_entry->iter == htab->stub_iteration)
11096 {
11097 br_entry->iter = 0;
11098
11099 if (htab->relbrlt != NULL)
11100 {
11101 /* Create a reloc for the branch lookup table entry. */
11102 Elf_Internal_Rela rela;
11103 bfd_byte *rl;
11104
11105 rela.r_offset = (br_entry->offset
11106 + htab->brlt->output_offset
11107 + htab->brlt->output_section->vma);
11108 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11109 rela.r_addend = dest;
11110
11111 rl = htab->relbrlt->contents;
11112 rl += (htab->relbrlt->reloc_count++
11113 * sizeof (Elf64_External_Rela));
11114 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11115 }
11116 else if (info->emitrelocations)
11117 {
11118 r = get_relocs (htab->brlt, 1);
11119 if (r == NULL)
11120 return FALSE;
11121 /* brlt, being SEC_LINKER_CREATED does not go through the
11122 normal reloc processing. Symbols and offsets are not
11123 translated from input file to output file form, so
11124 set up the offset per the output file. */
11125 r->r_offset = (br_entry->offset
11126 + htab->brlt->output_offset
11127 + htab->brlt->output_section->vma);
11128 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11129 r->r_addend = dest;
11130 }
11131 }
11132
11133 dest = (br_entry->offset
11134 + htab->brlt->output_offset
11135 + htab->brlt->output_section->vma);
11136
11137 off = (dest
11138 - elf_gp (htab->brlt->output_section->owner)
11139 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11140
11141 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11142 {
11143 info->callbacks->einfo
11144 (_("%P: linkage table error against `%T'\n"),
11145 stub_entry->root.string);
11146 bfd_set_error (bfd_error_bad_value);
11147 htab->stub_error = TRUE;
11148 return FALSE;
11149 }
11150
11151 if (info->emitrelocations)
11152 {
11153 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11154 if (r == NULL)
11155 return FALSE;
11156 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11157 if (bfd_big_endian (info->output_bfd))
11158 r[0].r_offset += 2;
11159 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11160 r[0].r_offset += 4;
11161 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11162 r[0].r_addend = dest;
11163 if (PPC_HA (off) != 0)
11164 {
11165 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11166 r[1].r_offset = r[0].r_offset + 4;
11167 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11168 r[1].r_addend = r[0].r_addend;
11169 }
11170 }
11171
11172 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11173 {
11174 if (PPC_HA (off) != 0)
11175 {
11176 size = 16;
11177 bfd_put_32 (htab->params->stub_bfd,
11178 ADDIS_R12_R2 | PPC_HA (off), loc);
11179 loc += 4;
11180 bfd_put_32 (htab->params->stub_bfd,
11181 LD_R12_0R12 | PPC_LO (off), loc);
11182 }
11183 else
11184 {
11185 size = 12;
11186 bfd_put_32 (htab->params->stub_bfd,
11187 LD_R12_0R2 | PPC_LO (off), loc);
11188 }
11189 }
11190 else
11191 {
11192 bfd_vma r2off = get_r2off (info, stub_entry);
11193
11194 if (r2off == (bfd_vma) -1)
11195 {
11196 htab->stub_error = TRUE;
11197 return FALSE;
11198 }
11199
11200 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11201 loc += 4;
11202 size = 16;
11203 if (PPC_HA (off) != 0)
11204 {
11205 size += 4;
11206 bfd_put_32 (htab->params->stub_bfd,
11207 ADDIS_R12_R2 | PPC_HA (off), loc);
11208 loc += 4;
11209 bfd_put_32 (htab->params->stub_bfd,
11210 LD_R12_0R12 | PPC_LO (off), loc);
11211 }
11212 else
11213 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11214
11215 if (PPC_HA (r2off) != 0)
11216 {
11217 size += 4;
11218 loc += 4;
11219 bfd_put_32 (htab->params->stub_bfd,
11220 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11221 }
11222 if (PPC_LO (r2off) != 0)
11223 {
11224 size += 4;
11225 loc += 4;
11226 bfd_put_32 (htab->params->stub_bfd,
11227 ADDI_R2_R2 | PPC_LO (r2off), loc);
11228 }
11229 }
11230 loc += 4;
11231 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11232 loc += 4;
11233 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11234 break;
11235
11236 case ppc_stub_plt_call:
11237 case ppc_stub_plt_call_r2save:
11238 if (stub_entry->h != NULL
11239 && stub_entry->h->is_func_descriptor
11240 && stub_entry->h->oh != NULL)
11241 {
11242 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11243
11244 /* If the old-ABI "dot-symbol" is undefined make it weak so
11245 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11246 if (fh->elf.root.type == bfd_link_hash_undefined
11247 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11248 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11249 fh->elf.root.type = bfd_link_hash_undefweak;
11250 }
11251
11252 /* Now build the stub. */
11253 dest = stub_entry->plt_ent->plt.offset & ~1;
11254 if (dest >= (bfd_vma) -2)
11255 abort ();
11256
11257 plt = htab->elf.splt;
11258 if (!htab->elf.dynamic_sections_created
11259 || stub_entry->h == NULL
11260 || stub_entry->h->elf.dynindx == -1)
11261 plt = htab->elf.iplt;
11262
11263 dest += plt->output_offset + plt->output_section->vma;
11264
11265 if (stub_entry->h == NULL
11266 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11267 {
11268 Elf_Internal_Rela rela;
11269 bfd_byte *rl;
11270
11271 rela.r_offset = dest;
11272 if (htab->opd_abi)
11273 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11274 else
11275 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11276 rela.r_addend = (stub_entry->target_value
11277 + stub_entry->target_section->output_offset
11278 + stub_entry->target_section->output_section->vma);
11279
11280 rl = (htab->elf.irelplt->contents
11281 + (htab->elf.irelplt->reloc_count++
11282 * sizeof (Elf64_External_Rela)));
11283 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11284 stub_entry->plt_ent->plt.offset |= 1;
11285 htab->local_ifunc_resolver = 1;
11286 }
11287
11288 off = (dest
11289 - elf_gp (plt->output_section->owner)
11290 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11291
11292 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11293 {
11294 info->callbacks->einfo
11295 /* xgettext:c-format */
11296 (_("%P: linkage table error against `%T'\n"),
11297 stub_entry->h != NULL
11298 ? stub_entry->h->elf.root.root.string
11299 : "<local sym>");
11300 bfd_set_error (bfd_error_bad_value);
11301 htab->stub_error = TRUE;
11302 return FALSE;
11303 }
11304
11305 if (htab->params->plt_stub_align != 0)
11306 {
11307 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11308
11309 stub_entry->group->stub_sec->size += pad;
11310 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11311 loc += pad;
11312 }
11313
11314 r = NULL;
11315 if (info->emitrelocations)
11316 {
11317 r = get_relocs (stub_entry->group->stub_sec,
11318 ((PPC_HA (off) != 0)
11319 + (htab->opd_abi
11320 ? 2 + (htab->params->plt_static_chain
11321 && PPC_HA (off + 16) == PPC_HA (off))
11322 : 1)));
11323 if (r == NULL)
11324 return FALSE;
11325 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11326 if (bfd_big_endian (info->output_bfd))
11327 r[0].r_offset += 2;
11328 r[0].r_addend = dest;
11329 }
11330 if (stub_entry->h != NULL
11331 && (stub_entry->h == htab->tls_get_addr_fd
11332 || stub_entry->h == htab->tls_get_addr)
11333 && htab->params->tls_get_addr_opt)
11334 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11335 else
11336 p = build_plt_stub (htab, stub_entry, loc, off, r);
11337 size = p - loc;
11338 break;
11339
11340 case ppc_stub_save_res:
11341 return TRUE;
11342
11343 default:
11344 BFD_FAIL ();
11345 return FALSE;
11346 }
11347
11348 stub_entry->group->stub_sec->size += size;
11349
11350 if (htab->params->emit_stub_syms)
11351 {
11352 struct elf_link_hash_entry *h;
11353 size_t len1, len2;
11354 char *name;
11355 const char *const stub_str[] = { "long_branch",
11356 "long_branch_r2off",
11357 "plt_branch",
11358 "plt_branch_r2off",
11359 "plt_call",
11360 "plt_call" };
11361
11362 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11363 len2 = strlen (stub_entry->root.string);
11364 name = bfd_malloc (len1 + len2 + 2);
11365 if (name == NULL)
11366 return FALSE;
11367 memcpy (name, stub_entry->root.string, 9);
11368 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11369 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11370 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11371 if (h == NULL)
11372 return FALSE;
11373 if (h->root.type == bfd_link_hash_new)
11374 {
11375 h->root.type = bfd_link_hash_defined;
11376 h->root.u.def.section = stub_entry->group->stub_sec;
11377 h->root.u.def.value = stub_entry->stub_offset;
11378 h->ref_regular = 1;
11379 h->def_regular = 1;
11380 h->ref_regular_nonweak = 1;
11381 h->forced_local = 1;
11382 h->non_elf = 0;
11383 h->root.linker_def = 1;
11384 }
11385 }
11386
11387 return TRUE;
11388 }
11389
11390 /* As above, but don't actually build the stub. Just bump offset so
11391 we know stub section sizes, and select plt_branch stubs where
11392 long_branch stubs won't do. */
11393
11394 static bfd_boolean
11395 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11396 {
11397 struct ppc_stub_hash_entry *stub_entry;
11398 struct bfd_link_info *info;
11399 struct ppc_link_hash_table *htab;
11400 bfd_vma off;
11401 int size;
11402
11403 /* Massage our args to the form they really have. */
11404 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11405 info = in_arg;
11406
11407 htab = ppc_hash_table (info);
11408 if (htab == NULL)
11409 return FALSE;
11410
11411 if (stub_entry->h != NULL
11412 && stub_entry->h->save_res
11413 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11414 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11415 {
11416 /* Don't make stubs to out-of-line register save/restore
11417 functions. Instead, emit copies of the functions. */
11418 stub_entry->group->needs_save_res = 1;
11419 stub_entry->stub_type = ppc_stub_save_res;
11420 return TRUE;
11421 }
11422
11423 if (stub_entry->stub_type == ppc_stub_plt_call
11424 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11425 {
11426 asection *plt;
11427 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11428 if (off >= (bfd_vma) -2)
11429 abort ();
11430 plt = htab->elf.splt;
11431 if (!htab->elf.dynamic_sections_created
11432 || stub_entry->h == NULL
11433 || stub_entry->h->elf.dynindx == -1)
11434 plt = htab->elf.iplt;
11435 off += (plt->output_offset
11436 + plt->output_section->vma
11437 - elf_gp (plt->output_section->owner)
11438 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11439
11440 size = plt_stub_size (htab, stub_entry, off);
11441 if (stub_entry->h != NULL
11442 && (stub_entry->h == htab->tls_get_addr_fd
11443 || stub_entry->h == htab->tls_get_addr)
11444 && htab->params->tls_get_addr_opt
11445 && (ALWAYS_EMIT_R2SAVE
11446 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11447 stub_entry->group->tls_get_addr_opt_bctrl
11448 = stub_entry->group->stub_sec->size + size - 5 * 4;
11449
11450 if (htab->params->plt_stub_align)
11451 size += plt_stub_pad (htab, stub_entry, off);
11452 if (info->emitrelocations)
11453 {
11454 stub_entry->group->stub_sec->reloc_count
11455 += ((PPC_HA (off) != 0)
11456 + (htab->opd_abi
11457 ? 2 + (htab->params->plt_static_chain
11458 && PPC_HA (off + 16) == PPC_HA (off))
11459 : 1));
11460 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11461 }
11462 }
11463 else
11464 {
11465 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11466 variants. */
11467 bfd_vma r2off = 0;
11468 bfd_vma local_off = 0;
11469
11470 off = (stub_entry->target_value
11471 + stub_entry->target_section->output_offset
11472 + stub_entry->target_section->output_section->vma);
11473 off -= (stub_entry->group->stub_sec->size
11474 + stub_entry->group->stub_sec->output_offset
11475 + stub_entry->group->stub_sec->output_section->vma);
11476
11477 /* Reset the stub type from the plt variant in case we now
11478 can reach with a shorter stub. */
11479 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11480 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11481
11482 size = 4;
11483 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11484 {
11485 r2off = get_r2off (info, stub_entry);
11486 if (r2off == (bfd_vma) -1)
11487 {
11488 htab->stub_error = TRUE;
11489 return FALSE;
11490 }
11491 size = 8;
11492 if (PPC_HA (r2off) != 0)
11493 size += 4;
11494 if (PPC_LO (r2off) != 0)
11495 size += 4;
11496 off -= size - 4;
11497 }
11498
11499 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11500
11501 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11502 Do the same for -R objects without function descriptors. */
11503 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11504 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11505 && r2off == 0
11506 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11507 {
11508 struct ppc_branch_hash_entry *br_entry;
11509
11510 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11511 stub_entry->root.string + 9,
11512 TRUE, FALSE);
11513 if (br_entry == NULL)
11514 {
11515 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11516 stub_entry->root.string);
11517 htab->stub_error = TRUE;
11518 return FALSE;
11519 }
11520
11521 if (br_entry->iter != htab->stub_iteration)
11522 {
11523 br_entry->iter = htab->stub_iteration;
11524 br_entry->offset = htab->brlt->size;
11525 htab->brlt->size += 8;
11526
11527 if (htab->relbrlt != NULL)
11528 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11529 else if (info->emitrelocations)
11530 {
11531 htab->brlt->reloc_count += 1;
11532 htab->brlt->flags |= SEC_RELOC;
11533 }
11534 }
11535
11536 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11537 off = (br_entry->offset
11538 + htab->brlt->output_offset
11539 + htab->brlt->output_section->vma
11540 - elf_gp (htab->brlt->output_section->owner)
11541 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11542
11543 if (info->emitrelocations)
11544 {
11545 stub_entry->group->stub_sec->reloc_count
11546 += 1 + (PPC_HA (off) != 0);
11547 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11548 }
11549
11550 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11551 {
11552 size = 12;
11553 if (PPC_HA (off) != 0)
11554 size = 16;
11555 }
11556 else
11557 {
11558 size = 16;
11559 if (PPC_HA (off) != 0)
11560 size += 4;
11561
11562 if (PPC_HA (r2off) != 0)
11563 size += 4;
11564 if (PPC_LO (r2off) != 0)
11565 size += 4;
11566 }
11567 }
11568 else if (info->emitrelocations)
11569 {
11570 stub_entry->group->stub_sec->reloc_count += 1;
11571 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11572 }
11573 }
11574
11575 stub_entry->group->stub_sec->size += size;
11576 return TRUE;
11577 }
11578
11579 /* Set up various things so that we can make a list of input sections
11580 for each output section included in the link. Returns -1 on error,
11581 0 when no stubs will be needed, and 1 on success. */
11582
11583 int
11584 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11585 {
11586 unsigned int id;
11587 bfd_size_type amt;
11588 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11589
11590 if (htab == NULL)
11591 return -1;
11592
11593 htab->sec_info_arr_size = bfd_get_next_section_id ();
11594 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11595 htab->sec_info = bfd_zmalloc (amt);
11596 if (htab->sec_info == NULL)
11597 return -1;
11598
11599 /* Set toc_off for com, und, abs and ind sections. */
11600 for (id = 0; id < 3; id++)
11601 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11602
11603 return 1;
11604 }
11605
11606 /* Set up for first pass at multitoc partitioning. */
11607
11608 void
11609 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11610 {
11611 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11612
11613 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11614 htab->toc_bfd = NULL;
11615 htab->toc_first_sec = NULL;
11616 }
11617
11618 /* The linker repeatedly calls this function for each TOC input section
11619 and linker generated GOT section. Group input bfds such that the toc
11620 within a group is less than 64k in size. */
11621
11622 bfd_boolean
11623 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11624 {
11625 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11626 bfd_vma addr, off, limit;
11627
11628 if (htab == NULL)
11629 return FALSE;
11630
11631 if (!htab->second_toc_pass)
11632 {
11633 /* Keep track of the first .toc or .got section for this input bfd. */
11634 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11635
11636 if (new_bfd)
11637 {
11638 htab->toc_bfd = isec->owner;
11639 htab->toc_first_sec = isec;
11640 }
11641
11642 addr = isec->output_offset + isec->output_section->vma;
11643 off = addr - htab->toc_curr;
11644 limit = 0x80008000;
11645 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11646 limit = 0x10000;
11647 if (off + isec->size > limit)
11648 {
11649 addr = (htab->toc_first_sec->output_offset
11650 + htab->toc_first_sec->output_section->vma);
11651 htab->toc_curr = addr;
11652 htab->toc_curr &= -TOC_BASE_ALIGN;
11653 }
11654
11655 /* toc_curr is the base address of this toc group. Set elf_gp
11656 for the input section to be the offset relative to the
11657 output toc base plus 0x8000. Making the input elf_gp an
11658 offset allows us to move the toc as a whole without
11659 recalculating input elf_gp. */
11660 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11661 off += TOC_BASE_OFF;
11662
11663 /* Die if someone uses a linker script that doesn't keep input
11664 file .toc and .got together. */
11665 if (new_bfd
11666 && elf_gp (isec->owner) != 0
11667 && elf_gp (isec->owner) != off)
11668 return FALSE;
11669
11670 elf_gp (isec->owner) = off;
11671 return TRUE;
11672 }
11673
11674 /* During the second pass toc_first_sec points to the start of
11675 a toc group, and toc_curr is used to track the old elf_gp.
11676 We use toc_bfd to ensure we only look at each bfd once. */
11677 if (htab->toc_bfd == isec->owner)
11678 return TRUE;
11679 htab->toc_bfd = isec->owner;
11680
11681 if (htab->toc_first_sec == NULL
11682 || htab->toc_curr != elf_gp (isec->owner))
11683 {
11684 htab->toc_curr = elf_gp (isec->owner);
11685 htab->toc_first_sec = isec;
11686 }
11687 addr = (htab->toc_first_sec->output_offset
11688 + htab->toc_first_sec->output_section->vma);
11689 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11690 elf_gp (isec->owner) = off;
11691
11692 return TRUE;
11693 }
11694
11695 /* Called via elf_link_hash_traverse to merge GOT entries for global
11696 symbol H. */
11697
11698 static bfd_boolean
11699 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11700 {
11701 if (h->root.type == bfd_link_hash_indirect)
11702 return TRUE;
11703
11704 merge_got_entries (&h->got.glist);
11705
11706 return TRUE;
11707 }
11708
11709 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11710 symbol H. */
11711
11712 static bfd_boolean
11713 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11714 {
11715 struct got_entry *gent;
11716
11717 if (h->root.type == bfd_link_hash_indirect)
11718 return TRUE;
11719
11720 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11721 if (!gent->is_indirect)
11722 allocate_got (h, (struct bfd_link_info *) inf, gent);
11723 return TRUE;
11724 }
11725
11726 /* Called on the first multitoc pass after the last call to
11727 ppc64_elf_next_toc_section. This function removes duplicate GOT
11728 entries. */
11729
11730 bfd_boolean
11731 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11732 {
11733 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11734 struct bfd *ibfd, *ibfd2;
11735 bfd_boolean done_something;
11736
11737 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11738
11739 if (!htab->do_multi_toc)
11740 return FALSE;
11741
11742 /* Merge global sym got entries within a toc group. */
11743 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11744
11745 /* And tlsld_got. */
11746 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11747 {
11748 struct got_entry *ent, *ent2;
11749
11750 if (!is_ppc64_elf (ibfd))
11751 continue;
11752
11753 ent = ppc64_tlsld_got (ibfd);
11754 if (!ent->is_indirect
11755 && ent->got.offset != (bfd_vma) -1)
11756 {
11757 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11758 {
11759 if (!is_ppc64_elf (ibfd2))
11760 continue;
11761
11762 ent2 = ppc64_tlsld_got (ibfd2);
11763 if (!ent2->is_indirect
11764 && ent2->got.offset != (bfd_vma) -1
11765 && elf_gp (ibfd2) == elf_gp (ibfd))
11766 {
11767 ent2->is_indirect = TRUE;
11768 ent2->got.ent = ent;
11769 }
11770 }
11771 }
11772 }
11773
11774 /* Zap sizes of got sections. */
11775 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11776 htab->elf.irelplt->size -= htab->got_reli_size;
11777 htab->got_reli_size = 0;
11778
11779 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11780 {
11781 asection *got, *relgot;
11782
11783 if (!is_ppc64_elf (ibfd))
11784 continue;
11785
11786 got = ppc64_elf_tdata (ibfd)->got;
11787 if (got != NULL)
11788 {
11789 got->rawsize = got->size;
11790 got->size = 0;
11791 relgot = ppc64_elf_tdata (ibfd)->relgot;
11792 relgot->rawsize = relgot->size;
11793 relgot->size = 0;
11794 }
11795 }
11796
11797 /* Now reallocate the got, local syms first. We don't need to
11798 allocate section contents again since we never increase size. */
11799 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11800 {
11801 struct got_entry **lgot_ents;
11802 struct got_entry **end_lgot_ents;
11803 struct plt_entry **local_plt;
11804 struct plt_entry **end_local_plt;
11805 unsigned char *lgot_masks;
11806 bfd_size_type locsymcount;
11807 Elf_Internal_Shdr *symtab_hdr;
11808 asection *s;
11809
11810 if (!is_ppc64_elf (ibfd))
11811 continue;
11812
11813 lgot_ents = elf_local_got_ents (ibfd);
11814 if (!lgot_ents)
11815 continue;
11816
11817 symtab_hdr = &elf_symtab_hdr (ibfd);
11818 locsymcount = symtab_hdr->sh_info;
11819 end_lgot_ents = lgot_ents + locsymcount;
11820 local_plt = (struct plt_entry **) end_lgot_ents;
11821 end_local_plt = local_plt + locsymcount;
11822 lgot_masks = (unsigned char *) end_local_plt;
11823 s = ppc64_elf_tdata (ibfd)->got;
11824 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11825 {
11826 struct got_entry *ent;
11827
11828 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11829 {
11830 unsigned int ent_size = 8;
11831 unsigned int rel_size = sizeof (Elf64_External_Rela);
11832
11833 ent->got.offset = s->size;
11834 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11835 {
11836 ent_size *= 2;
11837 rel_size *= 2;
11838 }
11839 s->size += ent_size;
11840 if ((*lgot_masks & PLT_IFUNC) != 0)
11841 {
11842 htab->elf.irelplt->size += rel_size;
11843 htab->got_reli_size += rel_size;
11844 }
11845 else if (bfd_link_pic (info))
11846 {
11847 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11848 srel->size += rel_size;
11849 }
11850 }
11851 }
11852 }
11853
11854 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11855
11856 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11857 {
11858 struct got_entry *ent;
11859
11860 if (!is_ppc64_elf (ibfd))
11861 continue;
11862
11863 ent = ppc64_tlsld_got (ibfd);
11864 if (!ent->is_indirect
11865 && ent->got.offset != (bfd_vma) -1)
11866 {
11867 asection *s = ppc64_elf_tdata (ibfd)->got;
11868 ent->got.offset = s->size;
11869 s->size += 16;
11870 if (bfd_link_pic (info))
11871 {
11872 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11873 srel->size += sizeof (Elf64_External_Rela);
11874 }
11875 }
11876 }
11877
11878 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11879 if (!done_something)
11880 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11881 {
11882 asection *got;
11883
11884 if (!is_ppc64_elf (ibfd))
11885 continue;
11886
11887 got = ppc64_elf_tdata (ibfd)->got;
11888 if (got != NULL)
11889 {
11890 done_something = got->rawsize != got->size;
11891 if (done_something)
11892 break;
11893 }
11894 }
11895
11896 if (done_something)
11897 (*htab->params->layout_sections_again) ();
11898
11899 /* Set up for second pass over toc sections to recalculate elf_gp
11900 on input sections. */
11901 htab->toc_bfd = NULL;
11902 htab->toc_first_sec = NULL;
11903 htab->second_toc_pass = TRUE;
11904 return done_something;
11905 }
11906
11907 /* Called after second pass of multitoc partitioning. */
11908
11909 void
11910 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11911 {
11912 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11913
11914 /* After the second pass, toc_curr tracks the TOC offset used
11915 for code sections below in ppc64_elf_next_input_section. */
11916 htab->toc_curr = TOC_BASE_OFF;
11917 }
11918
11919 /* No toc references were found in ISEC. If the code in ISEC makes no
11920 calls, then there's no need to use toc adjusting stubs when branching
11921 into ISEC. Actually, indirect calls from ISEC are OK as they will
11922 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11923 needed, and 2 if a cyclical call-graph was found but no other reason
11924 for a stub was detected. If called from the top level, a return of
11925 2 means the same as a return of 0. */
11926
11927 static int
11928 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11929 {
11930 int ret;
11931
11932 /* Mark this section as checked. */
11933 isec->call_check_done = 1;
11934
11935 /* We know none of our code bearing sections will need toc stubs. */
11936 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11937 return 0;
11938
11939 if (isec->size == 0)
11940 return 0;
11941
11942 if (isec->output_section == NULL)
11943 return 0;
11944
11945 ret = 0;
11946 if (isec->reloc_count != 0)
11947 {
11948 Elf_Internal_Rela *relstart, *rel;
11949 Elf_Internal_Sym *local_syms;
11950 struct ppc_link_hash_table *htab;
11951
11952 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11953 info->keep_memory);
11954 if (relstart == NULL)
11955 return -1;
11956
11957 /* Look for branches to outside of this section. */
11958 local_syms = NULL;
11959 htab = ppc_hash_table (info);
11960 if (htab == NULL)
11961 return -1;
11962
11963 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11964 {
11965 enum elf_ppc64_reloc_type r_type;
11966 unsigned long r_symndx;
11967 struct elf_link_hash_entry *h;
11968 struct ppc_link_hash_entry *eh;
11969 Elf_Internal_Sym *sym;
11970 asection *sym_sec;
11971 struct _opd_sec_data *opd;
11972 bfd_vma sym_value;
11973 bfd_vma dest;
11974
11975 r_type = ELF64_R_TYPE (rel->r_info);
11976 if (r_type != R_PPC64_REL24
11977 && r_type != R_PPC64_REL14
11978 && r_type != R_PPC64_REL14_BRTAKEN
11979 && r_type != R_PPC64_REL14_BRNTAKEN)
11980 continue;
11981
11982 r_symndx = ELF64_R_SYM (rel->r_info);
11983 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11984 isec->owner))
11985 {
11986 ret = -1;
11987 break;
11988 }
11989
11990 /* Calls to dynamic lib functions go through a plt call stub
11991 that uses r2. */
11992 eh = (struct ppc_link_hash_entry *) h;
11993 if (eh != NULL
11994 && (eh->elf.plt.plist != NULL
11995 || (eh->oh != NULL
11996 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11997 {
11998 ret = 1;
11999 break;
12000 }
12001
12002 if (sym_sec == NULL)
12003 /* Ignore other undefined symbols. */
12004 continue;
12005
12006 /* Assume branches to other sections not included in the
12007 link need stubs too, to cover -R and absolute syms. */
12008 if (sym_sec->output_section == NULL)
12009 {
12010 ret = 1;
12011 break;
12012 }
12013
12014 if (h == NULL)
12015 sym_value = sym->st_value;
12016 else
12017 {
12018 if (h->root.type != bfd_link_hash_defined
12019 && h->root.type != bfd_link_hash_defweak)
12020 abort ();
12021 sym_value = h->root.u.def.value;
12022 }
12023 sym_value += rel->r_addend;
12024
12025 /* If this branch reloc uses an opd sym, find the code section. */
12026 opd = get_opd_info (sym_sec);
12027 if (opd != NULL)
12028 {
12029 if (h == NULL && opd->adjust != NULL)
12030 {
12031 long adjust;
12032
12033 adjust = opd->adjust[OPD_NDX (sym_value)];
12034 if (adjust == -1)
12035 /* Assume deleted functions won't ever be called. */
12036 continue;
12037 sym_value += adjust;
12038 }
12039
12040 dest = opd_entry_value (sym_sec, sym_value,
12041 &sym_sec, NULL, FALSE);
12042 if (dest == (bfd_vma) -1)
12043 continue;
12044 }
12045 else
12046 dest = (sym_value
12047 + sym_sec->output_offset
12048 + sym_sec->output_section->vma);
12049
12050 /* Ignore branch to self. */
12051 if (sym_sec == isec)
12052 continue;
12053
12054 /* If the called function uses the toc, we need a stub. */
12055 if (sym_sec->has_toc_reloc
12056 || sym_sec->makes_toc_func_call)
12057 {
12058 ret = 1;
12059 break;
12060 }
12061
12062 /* Assume any branch that needs a long branch stub might in fact
12063 need a plt_branch stub. A plt_branch stub uses r2. */
12064 else if (dest - (isec->output_offset
12065 + isec->output_section->vma
12066 + rel->r_offset) + (1 << 25)
12067 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12068 ? h->other
12069 : sym->st_other))
12070 {
12071 ret = 1;
12072 break;
12073 }
12074
12075 /* If calling back to a section in the process of being
12076 tested, we can't say for sure that no toc adjusting stubs
12077 are needed, so don't return zero. */
12078 else if (sym_sec->call_check_in_progress)
12079 ret = 2;
12080
12081 /* Branches to another section that itself doesn't have any TOC
12082 references are OK. Recursively call ourselves to check. */
12083 else if (!sym_sec->call_check_done)
12084 {
12085 int recur;
12086
12087 /* Mark current section as indeterminate, so that other
12088 sections that call back to current won't be marked as
12089 known. */
12090 isec->call_check_in_progress = 1;
12091 recur = toc_adjusting_stub_needed (info, sym_sec);
12092 isec->call_check_in_progress = 0;
12093
12094 if (recur != 0)
12095 {
12096 ret = recur;
12097 if (recur != 2)
12098 break;
12099 }
12100 }
12101 }
12102
12103 if (local_syms != NULL
12104 && (elf_symtab_hdr (isec->owner).contents
12105 != (unsigned char *) local_syms))
12106 free (local_syms);
12107 if (elf_section_data (isec)->relocs != relstart)
12108 free (relstart);
12109 }
12110
12111 if ((ret & 1) == 0
12112 && isec->map_head.s != NULL
12113 && (strcmp (isec->output_section->name, ".init") == 0
12114 || strcmp (isec->output_section->name, ".fini") == 0))
12115 {
12116 if (isec->map_head.s->has_toc_reloc
12117 || isec->map_head.s->makes_toc_func_call)
12118 ret = 1;
12119 else if (!isec->map_head.s->call_check_done)
12120 {
12121 int recur;
12122 isec->call_check_in_progress = 1;
12123 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12124 isec->call_check_in_progress = 0;
12125 if (recur != 0)
12126 ret = recur;
12127 }
12128 }
12129
12130 if (ret == 1)
12131 isec->makes_toc_func_call = 1;
12132
12133 return ret;
12134 }
12135
12136 /* The linker repeatedly calls this function for each input section,
12137 in the order that input sections are linked into output sections.
12138 Build lists of input sections to determine groupings between which
12139 we may insert linker stubs. */
12140
12141 bfd_boolean
12142 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12143 {
12144 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12145
12146 if (htab == NULL)
12147 return FALSE;
12148
12149 if ((isec->output_section->flags & SEC_CODE) != 0
12150 && isec->output_section->id < htab->sec_info_arr_size)
12151 {
12152 /* This happens to make the list in reverse order,
12153 which is what we want. */
12154 htab->sec_info[isec->id].u.list
12155 = htab->sec_info[isec->output_section->id].u.list;
12156 htab->sec_info[isec->output_section->id].u.list = isec;
12157 }
12158
12159 if (htab->multi_toc_needed)
12160 {
12161 /* Analyse sections that aren't already flagged as needing a
12162 valid toc pointer. Exclude .fixup for the linux kernel.
12163 .fixup contains branches, but only back to the function that
12164 hit an exception. */
12165 if (!(isec->has_toc_reloc
12166 || (isec->flags & SEC_CODE) == 0
12167 || strcmp (isec->name, ".fixup") == 0
12168 || isec->call_check_done))
12169 {
12170 if (toc_adjusting_stub_needed (info, isec) < 0)
12171 return FALSE;
12172 }
12173 /* Make all sections use the TOC assigned for this object file.
12174 This will be wrong for pasted sections; We fix that in
12175 check_pasted_section(). */
12176 if (elf_gp (isec->owner) != 0)
12177 htab->toc_curr = elf_gp (isec->owner);
12178 }
12179
12180 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12181 return TRUE;
12182 }
12183
12184 /* Check that all .init and .fini sections use the same toc, if they
12185 have toc relocs. */
12186
12187 static bfd_boolean
12188 check_pasted_section (struct bfd_link_info *info, const char *name)
12189 {
12190 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12191
12192 if (o != NULL)
12193 {
12194 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12195 bfd_vma toc_off = 0;
12196 asection *i;
12197
12198 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12199 if (i->has_toc_reloc)
12200 {
12201 if (toc_off == 0)
12202 toc_off = htab->sec_info[i->id].toc_off;
12203 else if (toc_off != htab->sec_info[i->id].toc_off)
12204 return FALSE;
12205 }
12206
12207 if (toc_off == 0)
12208 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12209 if (i->makes_toc_func_call)
12210 {
12211 toc_off = htab->sec_info[i->id].toc_off;
12212 break;
12213 }
12214
12215 /* Make sure the whole pasted function uses the same toc offset. */
12216 if (toc_off != 0)
12217 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12218 htab->sec_info[i->id].toc_off = toc_off;
12219 }
12220 return TRUE;
12221 }
12222
12223 bfd_boolean
12224 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12225 {
12226 return (check_pasted_section (info, ".init")
12227 & check_pasted_section (info, ".fini"));
12228 }
12229
12230 /* See whether we can group stub sections together. Grouping stub
12231 sections may result in fewer stubs. More importantly, we need to
12232 put all .init* and .fini* stubs at the beginning of the .init or
12233 .fini output sections respectively, because glibc splits the
12234 _init and _fini functions into multiple parts. Putting a stub in
12235 the middle of a function is not a good idea. */
12236
12237 static bfd_boolean
12238 group_sections (struct bfd_link_info *info,
12239 bfd_size_type stub_group_size,
12240 bfd_boolean stubs_always_before_branch)
12241 {
12242 struct ppc_link_hash_table *htab;
12243 asection *osec;
12244 bfd_boolean suppress_size_errors;
12245
12246 htab = ppc_hash_table (info);
12247 if (htab == NULL)
12248 return FALSE;
12249
12250 suppress_size_errors = FALSE;
12251 if (stub_group_size == 1)
12252 {
12253 /* Default values. */
12254 if (stubs_always_before_branch)
12255 stub_group_size = 0x1e00000;
12256 else
12257 stub_group_size = 0x1c00000;
12258 suppress_size_errors = TRUE;
12259 }
12260
12261 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12262 {
12263 asection *tail;
12264
12265 if (osec->id >= htab->sec_info_arr_size)
12266 continue;
12267
12268 tail = htab->sec_info[osec->id].u.list;
12269 while (tail != NULL)
12270 {
12271 asection *curr;
12272 asection *prev;
12273 bfd_size_type total;
12274 bfd_boolean big_sec;
12275 bfd_vma curr_toc;
12276 struct map_stub *group;
12277 bfd_size_type group_size;
12278
12279 curr = tail;
12280 total = tail->size;
12281 group_size = (ppc64_elf_section_data (tail) != NULL
12282 && ppc64_elf_section_data (tail)->has_14bit_branch
12283 ? stub_group_size >> 10 : stub_group_size);
12284
12285 big_sec = total > group_size;
12286 if (big_sec && !suppress_size_errors)
12287 /* xgettext:c-format */
12288 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12289 tail->owner, tail);
12290 curr_toc = htab->sec_info[tail->id].toc_off;
12291
12292 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12293 && ((total += curr->output_offset - prev->output_offset)
12294 < (ppc64_elf_section_data (prev) != NULL
12295 && ppc64_elf_section_data (prev)->has_14bit_branch
12296 ? (group_size = stub_group_size >> 10) : group_size))
12297 && htab->sec_info[prev->id].toc_off == curr_toc)
12298 curr = prev;
12299
12300 /* OK, the size from the start of CURR to the end is less
12301 than group_size and thus can be handled by one stub
12302 section. (or the tail section is itself larger than
12303 group_size, in which case we may be toast.) We should
12304 really be keeping track of the total size of stubs added
12305 here, as stubs contribute to the final output section
12306 size. That's a little tricky, and this way will only
12307 break if stubs added make the total size more than 2^25,
12308 ie. for the default stub_group_size, if stubs total more
12309 than 2097152 bytes, or nearly 75000 plt call stubs. */
12310 group = bfd_alloc (curr->owner, sizeof (*group));
12311 if (group == NULL)
12312 return FALSE;
12313 group->link_sec = curr;
12314 group->stub_sec = NULL;
12315 group->needs_save_res = 0;
12316 group->tls_get_addr_opt_bctrl = -1u;
12317 group->next = htab->group;
12318 htab->group = group;
12319 do
12320 {
12321 prev = htab->sec_info[tail->id].u.list;
12322 /* Set up this stub group. */
12323 htab->sec_info[tail->id].u.group = group;
12324 }
12325 while (tail != curr && (tail = prev) != NULL);
12326
12327 /* But wait, there's more! Input sections up to group_size
12328 bytes before the stub section can be handled by it too.
12329 Don't do this if we have a really large section after the
12330 stubs, as adding more stubs increases the chance that
12331 branches may not reach into the stub section. */
12332 if (!stubs_always_before_branch && !big_sec)
12333 {
12334 total = 0;
12335 while (prev != NULL
12336 && ((total += tail->output_offset - prev->output_offset)
12337 < (ppc64_elf_section_data (prev) != NULL
12338 && ppc64_elf_section_data (prev)->has_14bit_branch
12339 ? (group_size = stub_group_size >> 10) : group_size))
12340 && htab->sec_info[prev->id].toc_off == curr_toc)
12341 {
12342 tail = prev;
12343 prev = htab->sec_info[tail->id].u.list;
12344 htab->sec_info[tail->id].u.group = group;
12345 }
12346 }
12347 tail = prev;
12348 }
12349 }
12350 return TRUE;
12351 }
12352
12353 static const unsigned char glink_eh_frame_cie[] =
12354 {
12355 0, 0, 0, 16, /* length. */
12356 0, 0, 0, 0, /* id. */
12357 1, /* CIE version. */
12358 'z', 'R', 0, /* Augmentation string. */
12359 4, /* Code alignment. */
12360 0x78, /* Data alignment. */
12361 65, /* RA reg. */
12362 1, /* Augmentation size. */
12363 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12364 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12365 };
12366
12367 static size_t
12368 stub_eh_frame_size (struct map_stub *group, size_t align)
12369 {
12370 size_t this_size = 17;
12371 if (group->tls_get_addr_opt_bctrl != -1u)
12372 {
12373 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12374 if (to_bctrl < 64)
12375 this_size += 1;
12376 else if (to_bctrl < 256)
12377 this_size += 2;
12378 else if (to_bctrl < 65536)
12379 this_size += 3;
12380 else
12381 this_size += 5;
12382 this_size += 6;
12383 }
12384 this_size = (this_size + align - 1) & -align;
12385 return this_size;
12386 }
12387
12388 /* Stripping output sections is normally done before dynamic section
12389 symbols have been allocated. This function is called later, and
12390 handles cases like htab->brlt which is mapped to its own output
12391 section. */
12392
12393 static void
12394 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12395 {
12396 if (isec->size == 0
12397 && isec->output_section->size == 0
12398 && !(isec->output_section->flags & SEC_KEEP)
12399 && !bfd_section_removed_from_list (info->output_bfd,
12400 isec->output_section)
12401 && elf_section_data (isec->output_section)->dynindx == 0)
12402 {
12403 isec->output_section->flags |= SEC_EXCLUDE;
12404 bfd_section_list_remove (info->output_bfd, isec->output_section);
12405 info->output_bfd->section_count--;
12406 }
12407 }
12408
12409 /* Determine and set the size of the stub section for a final link.
12410
12411 The basic idea here is to examine all the relocations looking for
12412 PC-relative calls to a target that is unreachable with a "bl"
12413 instruction. */
12414
12415 bfd_boolean
12416 ppc64_elf_size_stubs (struct bfd_link_info *info)
12417 {
12418 bfd_size_type stub_group_size;
12419 bfd_boolean stubs_always_before_branch;
12420 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12421
12422 if (htab == NULL)
12423 return FALSE;
12424
12425 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12426 htab->params->plt_thread_safe = 1;
12427 if (!htab->opd_abi)
12428 htab->params->plt_thread_safe = 0;
12429 else if (htab->params->plt_thread_safe == -1)
12430 {
12431 static const char *const thread_starter[] =
12432 {
12433 "pthread_create",
12434 /* libstdc++ */
12435 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12436 /* librt */
12437 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12438 "mq_notify", "create_timer",
12439 /* libanl */
12440 "getaddrinfo_a",
12441 /* libgomp */
12442 "GOMP_parallel",
12443 "GOMP_parallel_start",
12444 "GOMP_parallel_loop_static",
12445 "GOMP_parallel_loop_static_start",
12446 "GOMP_parallel_loop_dynamic",
12447 "GOMP_parallel_loop_dynamic_start",
12448 "GOMP_parallel_loop_guided",
12449 "GOMP_parallel_loop_guided_start",
12450 "GOMP_parallel_loop_runtime",
12451 "GOMP_parallel_loop_runtime_start",
12452 "GOMP_parallel_sections",
12453 "GOMP_parallel_sections_start",
12454 /* libgo */
12455 "__go_go",
12456 };
12457 unsigned i;
12458
12459 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12460 {
12461 struct elf_link_hash_entry *h;
12462 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12463 FALSE, FALSE, TRUE);
12464 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12465 if (htab->params->plt_thread_safe)
12466 break;
12467 }
12468 }
12469 stubs_always_before_branch = htab->params->group_size < 0;
12470 if (htab->params->group_size < 0)
12471 stub_group_size = -htab->params->group_size;
12472 else
12473 stub_group_size = htab->params->group_size;
12474
12475 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12476 return FALSE;
12477
12478 #define STUB_SHRINK_ITER 20
12479 /* Loop until no stubs added. After iteration 20 of this loop we may
12480 exit on a stub section shrinking. This is to break out of a
12481 pathological case where adding stubs on one iteration decreases
12482 section gaps (perhaps due to alignment), which then requires
12483 fewer or smaller stubs on the next iteration. */
12484
12485 while (1)
12486 {
12487 bfd *input_bfd;
12488 unsigned int bfd_indx;
12489 struct map_stub *group;
12490
12491 htab->stub_iteration += 1;
12492
12493 for (input_bfd = info->input_bfds, bfd_indx = 0;
12494 input_bfd != NULL;
12495 input_bfd = input_bfd->link.next, bfd_indx++)
12496 {
12497 Elf_Internal_Shdr *symtab_hdr;
12498 asection *section;
12499 Elf_Internal_Sym *local_syms = NULL;
12500
12501 if (!is_ppc64_elf (input_bfd))
12502 continue;
12503
12504 /* We'll need the symbol table in a second. */
12505 symtab_hdr = &elf_symtab_hdr (input_bfd);
12506 if (symtab_hdr->sh_info == 0)
12507 continue;
12508
12509 /* Walk over each section attached to the input bfd. */
12510 for (section = input_bfd->sections;
12511 section != NULL;
12512 section = section->next)
12513 {
12514 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12515
12516 /* If there aren't any relocs, then there's nothing more
12517 to do. */
12518 if ((section->flags & SEC_RELOC) == 0
12519 || (section->flags & SEC_ALLOC) == 0
12520 || (section->flags & SEC_LOAD) == 0
12521 || (section->flags & SEC_CODE) == 0
12522 || section->reloc_count == 0)
12523 continue;
12524
12525 /* If this section is a link-once section that will be
12526 discarded, then don't create any stubs. */
12527 if (section->output_section == NULL
12528 || section->output_section->owner != info->output_bfd)
12529 continue;
12530
12531 /* Get the relocs. */
12532 internal_relocs
12533 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12534 info->keep_memory);
12535 if (internal_relocs == NULL)
12536 goto error_ret_free_local;
12537
12538 /* Now examine each relocation. */
12539 irela = internal_relocs;
12540 irelaend = irela + section->reloc_count;
12541 for (; irela < irelaend; irela++)
12542 {
12543 enum elf_ppc64_reloc_type r_type;
12544 unsigned int r_indx;
12545 enum ppc_stub_type stub_type;
12546 struct ppc_stub_hash_entry *stub_entry;
12547 asection *sym_sec, *code_sec;
12548 bfd_vma sym_value, code_value;
12549 bfd_vma destination;
12550 unsigned long local_off;
12551 bfd_boolean ok_dest;
12552 struct ppc_link_hash_entry *hash;
12553 struct ppc_link_hash_entry *fdh;
12554 struct elf_link_hash_entry *h;
12555 Elf_Internal_Sym *sym;
12556 char *stub_name;
12557 const asection *id_sec;
12558 struct _opd_sec_data *opd;
12559 struct plt_entry *plt_ent;
12560
12561 r_type = ELF64_R_TYPE (irela->r_info);
12562 r_indx = ELF64_R_SYM (irela->r_info);
12563
12564 if (r_type >= R_PPC64_max)
12565 {
12566 bfd_set_error (bfd_error_bad_value);
12567 goto error_ret_free_internal;
12568 }
12569
12570 /* Only look for stubs on branch instructions. */
12571 if (r_type != R_PPC64_REL24
12572 && r_type != R_PPC64_REL14
12573 && r_type != R_PPC64_REL14_BRTAKEN
12574 && r_type != R_PPC64_REL14_BRNTAKEN)
12575 continue;
12576
12577 /* Now determine the call target, its name, value,
12578 section. */
12579 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12580 r_indx, input_bfd))
12581 goto error_ret_free_internal;
12582 hash = (struct ppc_link_hash_entry *) h;
12583
12584 ok_dest = FALSE;
12585 fdh = NULL;
12586 sym_value = 0;
12587 if (hash == NULL)
12588 {
12589 sym_value = sym->st_value;
12590 if (sym_sec != NULL
12591 && sym_sec->output_section != NULL)
12592 ok_dest = TRUE;
12593 }
12594 else if (hash->elf.root.type == bfd_link_hash_defined
12595 || hash->elf.root.type == bfd_link_hash_defweak)
12596 {
12597 sym_value = hash->elf.root.u.def.value;
12598 if (sym_sec->output_section != NULL)
12599 ok_dest = TRUE;
12600 }
12601 else if (hash->elf.root.type == bfd_link_hash_undefweak
12602 || hash->elf.root.type == bfd_link_hash_undefined)
12603 {
12604 /* Recognise an old ABI func code entry sym, and
12605 use the func descriptor sym instead if it is
12606 defined. */
12607 if (hash->elf.root.root.string[0] == '.'
12608 && hash->oh != NULL)
12609 {
12610 fdh = ppc_follow_link (hash->oh);
12611 if (fdh->elf.root.type == bfd_link_hash_defined
12612 || fdh->elf.root.type == bfd_link_hash_defweak)
12613 {
12614 sym_sec = fdh->elf.root.u.def.section;
12615 sym_value = fdh->elf.root.u.def.value;
12616 if (sym_sec->output_section != NULL)
12617 ok_dest = TRUE;
12618 }
12619 else
12620 fdh = NULL;
12621 }
12622 }
12623 else
12624 {
12625 bfd_set_error (bfd_error_bad_value);
12626 goto error_ret_free_internal;
12627 }
12628
12629 destination = 0;
12630 local_off = 0;
12631 if (ok_dest)
12632 {
12633 sym_value += irela->r_addend;
12634 destination = (sym_value
12635 + sym_sec->output_offset
12636 + sym_sec->output_section->vma);
12637 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12638 ? hash->elf.other
12639 : sym->st_other);
12640 }
12641
12642 code_sec = sym_sec;
12643 code_value = sym_value;
12644 opd = get_opd_info (sym_sec);
12645 if (opd != NULL)
12646 {
12647 bfd_vma dest;
12648
12649 if (hash == NULL && opd->adjust != NULL)
12650 {
12651 long adjust = opd->adjust[OPD_NDX (sym_value)];
12652 if (adjust == -1)
12653 continue;
12654 code_value += adjust;
12655 sym_value += adjust;
12656 }
12657 dest = opd_entry_value (sym_sec, sym_value,
12658 &code_sec, &code_value, FALSE);
12659 if (dest != (bfd_vma) -1)
12660 {
12661 destination = dest;
12662 if (fdh != NULL)
12663 {
12664 /* Fixup old ABI sym to point at code
12665 entry. */
12666 hash->elf.root.type = bfd_link_hash_defweak;
12667 hash->elf.root.u.def.section = code_sec;
12668 hash->elf.root.u.def.value = code_value;
12669 }
12670 }
12671 }
12672
12673 /* Determine what (if any) linker stub is needed. */
12674 plt_ent = NULL;
12675 stub_type = ppc_type_of_stub (section, irela, &hash,
12676 &plt_ent, destination,
12677 local_off);
12678
12679 if (stub_type != ppc_stub_plt_call)
12680 {
12681 /* Check whether we need a TOC adjusting stub.
12682 Since the linker pastes together pieces from
12683 different object files when creating the
12684 _init and _fini functions, it may be that a
12685 call to what looks like a local sym is in
12686 fact a call needing a TOC adjustment. */
12687 if (code_sec != NULL
12688 && code_sec->output_section != NULL
12689 && (htab->sec_info[code_sec->id].toc_off
12690 != htab->sec_info[section->id].toc_off)
12691 && (code_sec->has_toc_reloc
12692 || code_sec->makes_toc_func_call))
12693 stub_type = ppc_stub_long_branch_r2off;
12694 }
12695
12696 if (stub_type == ppc_stub_none)
12697 continue;
12698
12699 /* __tls_get_addr calls might be eliminated. */
12700 if (stub_type != ppc_stub_plt_call
12701 && hash != NULL
12702 && (hash == htab->tls_get_addr
12703 || hash == htab->tls_get_addr_fd)
12704 && section->has_tls_reloc
12705 && irela != internal_relocs)
12706 {
12707 /* Get tls info. */
12708 unsigned char *tls_mask;
12709
12710 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12711 irela - 1, input_bfd))
12712 goto error_ret_free_internal;
12713 if (*tls_mask != 0)
12714 continue;
12715 }
12716
12717 if (stub_type == ppc_stub_plt_call)
12718 {
12719 if (!htab->opd_abi
12720 && htab->params->plt_localentry0 != 0
12721 && is_elfv2_localentry0 (&hash->elf))
12722 htab->has_plt_localentry0 = 1;
12723 else if (irela + 1 < irelaend
12724 && irela[1].r_offset == irela->r_offset + 4
12725 && (ELF64_R_TYPE (irela[1].r_info)
12726 == R_PPC64_TOCSAVE))
12727 {
12728 if (!tocsave_find (htab, INSERT,
12729 &local_syms, irela + 1, input_bfd))
12730 goto error_ret_free_internal;
12731 }
12732 else
12733 stub_type = ppc_stub_plt_call_r2save;
12734 }
12735
12736 /* Support for grouping stub sections. */
12737 id_sec = htab->sec_info[section->id].u.group->link_sec;
12738
12739 /* Get the name of this stub. */
12740 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12741 if (!stub_name)
12742 goto error_ret_free_internal;
12743
12744 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12745 stub_name, FALSE, FALSE);
12746 if (stub_entry != NULL)
12747 {
12748 /* The proper stub has already been created. */
12749 free (stub_name);
12750 if (stub_type == ppc_stub_plt_call_r2save)
12751 stub_entry->stub_type = stub_type;
12752 continue;
12753 }
12754
12755 stub_entry = ppc_add_stub (stub_name, section, info);
12756 if (stub_entry == NULL)
12757 {
12758 free (stub_name);
12759 error_ret_free_internal:
12760 if (elf_section_data (section)->relocs == NULL)
12761 free (internal_relocs);
12762 error_ret_free_local:
12763 if (local_syms != NULL
12764 && (symtab_hdr->contents
12765 != (unsigned char *) local_syms))
12766 free (local_syms);
12767 return FALSE;
12768 }
12769
12770 stub_entry->stub_type = stub_type;
12771 if (stub_type != ppc_stub_plt_call
12772 && stub_type != ppc_stub_plt_call_r2save)
12773 {
12774 stub_entry->target_value = code_value;
12775 stub_entry->target_section = code_sec;
12776 }
12777 else
12778 {
12779 stub_entry->target_value = sym_value;
12780 stub_entry->target_section = sym_sec;
12781 }
12782 stub_entry->h = hash;
12783 stub_entry->plt_ent = plt_ent;
12784 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12785
12786 if (stub_entry->h != NULL)
12787 htab->stub_globals += 1;
12788 }
12789
12790 /* We're done with the internal relocs, free them. */
12791 if (elf_section_data (section)->relocs != internal_relocs)
12792 free (internal_relocs);
12793 }
12794
12795 if (local_syms != NULL
12796 && symtab_hdr->contents != (unsigned char *) local_syms)
12797 {
12798 if (!info->keep_memory)
12799 free (local_syms);
12800 else
12801 symtab_hdr->contents = (unsigned char *) local_syms;
12802 }
12803 }
12804
12805 /* We may have added some stubs. Find out the new size of the
12806 stub sections. */
12807 for (group = htab->group; group != NULL; group = group->next)
12808 if (group->stub_sec != NULL)
12809 {
12810 asection *stub_sec = group->stub_sec;
12811
12812 if (htab->stub_iteration <= STUB_SHRINK_ITER
12813 || stub_sec->rawsize < stub_sec->size)
12814 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12815 stub_sec->rawsize = stub_sec->size;
12816 stub_sec->size = 0;
12817 stub_sec->reloc_count = 0;
12818 stub_sec->flags &= ~SEC_RELOC;
12819 }
12820
12821 htab->brlt->size = 0;
12822 htab->brlt->reloc_count = 0;
12823 htab->brlt->flags &= ~SEC_RELOC;
12824 if (htab->relbrlt != NULL)
12825 htab->relbrlt->size = 0;
12826
12827 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12828
12829 for (group = htab->group; group != NULL; group = group->next)
12830 if (group->needs_save_res)
12831 group->stub_sec->size += htab->sfpr->size;
12832
12833 if (info->emitrelocations
12834 && htab->glink != NULL && htab->glink->size != 0)
12835 {
12836 htab->glink->reloc_count = 1;
12837 htab->glink->flags |= SEC_RELOC;
12838 }
12839
12840 if (htab->glink_eh_frame != NULL
12841 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12842 && htab->glink_eh_frame->output_section->size != 0)
12843 {
12844 size_t size = 0, align = 4;
12845
12846 for (group = htab->group; group != NULL; group = group->next)
12847 if (group->stub_sec != NULL)
12848 size += stub_eh_frame_size (group, align);
12849 if (htab->glink != NULL && htab->glink->size != 0)
12850 size += (24 + align - 1) & -align;
12851 if (size != 0)
12852 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12853 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12854 size = (size + align - 1) & -align;
12855 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12856 htab->glink_eh_frame->size = size;
12857 }
12858
12859 if (htab->params->plt_stub_align != 0)
12860 for (group = htab->group; group != NULL; group = group->next)
12861 if (group->stub_sec != NULL)
12862 group->stub_sec->size = ((group->stub_sec->size
12863 + (1 << htab->params->plt_stub_align) - 1)
12864 & -(1 << htab->params->plt_stub_align));
12865
12866 for (group = htab->group; group != NULL; group = group->next)
12867 if (group->stub_sec != NULL
12868 && group->stub_sec->rawsize != group->stub_sec->size
12869 && (htab->stub_iteration <= STUB_SHRINK_ITER
12870 || group->stub_sec->rawsize < group->stub_sec->size))
12871 break;
12872
12873 if (group == NULL
12874 && (htab->glink_eh_frame == NULL
12875 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12876 break;
12877
12878 /* Ask the linker to do its stuff. */
12879 (*htab->params->layout_sections_again) ();
12880 }
12881
12882 if (htab->glink_eh_frame != NULL
12883 && htab->glink_eh_frame->size != 0)
12884 {
12885 bfd_vma val;
12886 bfd_byte *p, *last_fde;
12887 size_t last_fde_len, size, align, pad;
12888 struct map_stub *group;
12889
12890 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12891 if (p == NULL)
12892 return FALSE;
12893 htab->glink_eh_frame->contents = p;
12894 last_fde = p;
12895 align = 4;
12896
12897 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12898 /* CIE length (rewrite in case little-endian). */
12899 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12900 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12901 p += last_fde_len + 4;
12902
12903 for (group = htab->group; group != NULL; group = group->next)
12904 if (group->stub_sec != NULL)
12905 {
12906 last_fde = p;
12907 last_fde_len = stub_eh_frame_size (group, align) - 4;
12908 /* FDE length. */
12909 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12910 p += 4;
12911 /* CIE pointer. */
12912 val = p - htab->glink_eh_frame->contents;
12913 bfd_put_32 (htab->elf.dynobj, val, p);
12914 p += 4;
12915 /* Offset to stub section, written later. */
12916 p += 4;
12917 /* stub section size. */
12918 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12919 p += 4;
12920 /* Augmentation. */
12921 p += 1;
12922 if (group->tls_get_addr_opt_bctrl != -1u)
12923 {
12924 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12925
12926 /* This FDE needs more than just the default.
12927 Describe __tls_get_addr_opt stub LR. */
12928 if (to_bctrl < 64)
12929 *p++ = DW_CFA_advance_loc + to_bctrl;
12930 else if (to_bctrl < 256)
12931 {
12932 *p++ = DW_CFA_advance_loc1;
12933 *p++ = to_bctrl;
12934 }
12935 else if (to_bctrl < 65536)
12936 {
12937 *p++ = DW_CFA_advance_loc2;
12938 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12939 p += 2;
12940 }
12941 else
12942 {
12943 *p++ = DW_CFA_advance_loc4;
12944 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12945 p += 4;
12946 }
12947 *p++ = DW_CFA_offset_extended_sf;
12948 *p++ = 65;
12949 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12950 *p++ = DW_CFA_advance_loc + 4;
12951 *p++ = DW_CFA_restore_extended;
12952 *p++ = 65;
12953 }
12954 /* Pad. */
12955 p = last_fde + last_fde_len + 4;
12956 }
12957 if (htab->glink != NULL && htab->glink->size != 0)
12958 {
12959 last_fde = p;
12960 last_fde_len = ((24 + align - 1) & -align) - 4;
12961 /* FDE length. */
12962 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12963 p += 4;
12964 /* CIE pointer. */
12965 val = p - htab->glink_eh_frame->contents;
12966 bfd_put_32 (htab->elf.dynobj, val, p);
12967 p += 4;
12968 /* Offset to .glink, written later. */
12969 p += 4;
12970 /* .glink size. */
12971 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12972 p += 4;
12973 /* Augmentation. */
12974 p += 1;
12975
12976 *p++ = DW_CFA_advance_loc + 1;
12977 *p++ = DW_CFA_register;
12978 *p++ = 65;
12979 *p++ = htab->opd_abi ? 12 : 0;
12980 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12981 *p++ = DW_CFA_restore_extended;
12982 *p++ = 65;
12983 p += ((24 + align - 1) & -align) - 24;
12984 }
12985 /* Subsume any padding into the last FDE if user .eh_frame
12986 sections are aligned more than glink_eh_frame. Otherwise any
12987 zero padding will be seen as a terminator. */
12988 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12989 size = p - htab->glink_eh_frame->contents;
12990 pad = ((size + align - 1) & -align) - size;
12991 htab->glink_eh_frame->size = size + pad;
12992 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12993 }
12994
12995 maybe_strip_output (info, htab->brlt);
12996 if (htab->glink_eh_frame != NULL)
12997 maybe_strip_output (info, htab->glink_eh_frame);
12998
12999 return TRUE;
13000 }
13001
13002 /* Called after we have determined section placement. If sections
13003 move, we'll be called again. Provide a value for TOCstart. */
13004
13005 bfd_vma
13006 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
13007 {
13008 asection *s;
13009 bfd_vma TOCstart, adjust;
13010
13011 if (info != NULL)
13012 {
13013 struct elf_link_hash_entry *h;
13014 struct elf_link_hash_table *htab = elf_hash_table (info);
13015
13016 if (is_elf_hash_table (htab)
13017 && htab->hgot != NULL)
13018 h = htab->hgot;
13019 else
13020 {
13021 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
13022 if (is_elf_hash_table (htab))
13023 htab->hgot = h;
13024 }
13025 if (h != NULL
13026 && h->root.type == bfd_link_hash_defined
13027 && !h->root.linker_def
13028 && (!is_elf_hash_table (htab)
13029 || h->def_regular))
13030 {
13031 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
13032 + h->root.u.def.section->output_offset
13033 + h->root.u.def.section->output_section->vma);
13034 _bfd_set_gp_value (obfd, TOCstart);
13035 return TOCstart;
13036 }
13037 }
13038
13039 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
13040 order. The TOC starts where the first of these sections starts. */
13041 s = bfd_get_section_by_name (obfd, ".got");
13042 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13043 s = bfd_get_section_by_name (obfd, ".toc");
13044 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13045 s = bfd_get_section_by_name (obfd, ".tocbss");
13046 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13047 s = bfd_get_section_by_name (obfd, ".plt");
13048 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13049 {
13050 /* This may happen for
13051 o references to TOC base (SYM@toc / TOC[tc0]) without a
13052 .toc directive
13053 o bad linker script
13054 o --gc-sections and empty TOC sections
13055
13056 FIXME: Warn user? */
13057
13058 /* Look for a likely section. We probably won't even be
13059 using TOCstart. */
13060 for (s = obfd->sections; s != NULL; s = s->next)
13061 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13062 | SEC_EXCLUDE))
13063 == (SEC_ALLOC | SEC_SMALL_DATA))
13064 break;
13065 if (s == NULL)
13066 for (s = obfd->sections; s != NULL; s = s->next)
13067 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13068 == (SEC_ALLOC | SEC_SMALL_DATA))
13069 break;
13070 if (s == NULL)
13071 for (s = obfd->sections; s != NULL; s = s->next)
13072 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13073 == SEC_ALLOC)
13074 break;
13075 if (s == NULL)
13076 for (s = obfd->sections; s != NULL; s = s->next)
13077 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13078 break;
13079 }
13080
13081 TOCstart = 0;
13082 if (s != NULL)
13083 TOCstart = s->output_section->vma + s->output_offset;
13084
13085 /* Force alignment. */
13086 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13087 TOCstart -= adjust;
13088 _bfd_set_gp_value (obfd, TOCstart);
13089
13090 if (info != NULL && s != NULL)
13091 {
13092 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13093
13094 if (htab != NULL)
13095 {
13096 if (htab->elf.hgot != NULL)
13097 {
13098 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13099 htab->elf.hgot->root.u.def.section = s;
13100 }
13101 }
13102 else
13103 {
13104 struct bfd_link_hash_entry *bh = NULL;
13105 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13106 s, TOC_BASE_OFF - adjust,
13107 NULL, FALSE, FALSE, &bh);
13108 }
13109 }
13110 return TOCstart;
13111 }
13112
13113 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13114 write out any global entry stubs. */
13115
13116 static bfd_boolean
13117 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13118 {
13119 struct bfd_link_info *info;
13120 struct ppc_link_hash_table *htab;
13121 struct plt_entry *pent;
13122 asection *s;
13123
13124 if (h->root.type == bfd_link_hash_indirect)
13125 return TRUE;
13126
13127 if (!h->pointer_equality_needed)
13128 return TRUE;
13129
13130 if (h->def_regular)
13131 return TRUE;
13132
13133 info = inf;
13134 htab = ppc_hash_table (info);
13135 if (htab == NULL)
13136 return FALSE;
13137
13138 s = htab->glink;
13139 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13140 if (pent->plt.offset != (bfd_vma) -1
13141 && pent->addend == 0)
13142 {
13143 bfd_byte *p;
13144 asection *plt;
13145 bfd_vma off;
13146
13147 p = s->contents + h->root.u.def.value;
13148 plt = htab->elf.splt;
13149 if (!htab->elf.dynamic_sections_created
13150 || h->dynindx == -1)
13151 plt = htab->elf.iplt;
13152 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13153 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13154
13155 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13156 {
13157 info->callbacks->einfo
13158 (_("%P: linkage table error against `%T'\n"),
13159 h->root.root.string);
13160 bfd_set_error (bfd_error_bad_value);
13161 htab->stub_error = TRUE;
13162 }
13163
13164 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13165 if (htab->params->emit_stub_syms)
13166 {
13167 size_t len = strlen (h->root.root.string);
13168 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13169
13170 if (name == NULL)
13171 return FALSE;
13172
13173 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13174 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13175 if (h == NULL)
13176 return FALSE;
13177 if (h->root.type == bfd_link_hash_new)
13178 {
13179 h->root.type = bfd_link_hash_defined;
13180 h->root.u.def.section = s;
13181 h->root.u.def.value = p - s->contents;
13182 h->ref_regular = 1;
13183 h->def_regular = 1;
13184 h->ref_regular_nonweak = 1;
13185 h->forced_local = 1;
13186 h->non_elf = 0;
13187 h->root.linker_def = 1;
13188 }
13189 }
13190
13191 if (PPC_HA (off) != 0)
13192 {
13193 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13194 p += 4;
13195 }
13196 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13197 p += 4;
13198 bfd_put_32 (s->owner, MTCTR_R12, p);
13199 p += 4;
13200 bfd_put_32 (s->owner, BCTR, p);
13201 break;
13202 }
13203 return TRUE;
13204 }
13205
13206 /* Build all the stubs associated with the current output file.
13207 The stubs are kept in a hash table attached to the main linker
13208 hash table. This function is called via gldelf64ppc_finish. */
13209
13210 bfd_boolean
13211 ppc64_elf_build_stubs (struct bfd_link_info *info,
13212 char **stats)
13213 {
13214 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13215 struct map_stub *group;
13216 asection *stub_sec;
13217 bfd_byte *p;
13218 int stub_sec_count = 0;
13219
13220 if (htab == NULL)
13221 return FALSE;
13222
13223 /* Allocate memory to hold the linker stubs. */
13224 for (group = htab->group; group != NULL; group = group->next)
13225 if ((stub_sec = group->stub_sec) != NULL
13226 && stub_sec->size != 0)
13227 {
13228 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13229 if (stub_sec->contents == NULL)
13230 return FALSE;
13231 stub_sec->size = 0;
13232 }
13233
13234 if (htab->glink != NULL && htab->glink->size != 0)
13235 {
13236 unsigned int indx;
13237 bfd_vma plt0;
13238
13239 /* Build the .glink plt call stub. */
13240 if (htab->params->emit_stub_syms)
13241 {
13242 struct elf_link_hash_entry *h;
13243 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13244 TRUE, FALSE, FALSE);
13245 if (h == NULL)
13246 return FALSE;
13247 if (h->root.type == bfd_link_hash_new)
13248 {
13249 h->root.type = bfd_link_hash_defined;
13250 h->root.u.def.section = htab->glink;
13251 h->root.u.def.value = 8;
13252 h->ref_regular = 1;
13253 h->def_regular = 1;
13254 h->ref_regular_nonweak = 1;
13255 h->forced_local = 1;
13256 h->non_elf = 0;
13257 h->root.linker_def = 1;
13258 }
13259 }
13260 plt0 = (htab->elf.splt->output_section->vma
13261 + htab->elf.splt->output_offset
13262 - 16);
13263 if (info->emitrelocations)
13264 {
13265 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13266 if (r == NULL)
13267 return FALSE;
13268 r->r_offset = (htab->glink->output_offset
13269 + htab->glink->output_section->vma);
13270 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13271 r->r_addend = plt0;
13272 }
13273 p = htab->glink->contents;
13274 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13275 bfd_put_64 (htab->glink->owner, plt0, p);
13276 p += 8;
13277 if (htab->opd_abi)
13278 {
13279 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13280 p += 4;
13281 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13282 p += 4;
13283 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13284 p += 4;
13285 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13286 p += 4;
13287 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13288 p += 4;
13289 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13290 p += 4;
13291 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13292 p += 4;
13293 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13294 p += 4;
13295 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13296 p += 4;
13297 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13298 p += 4;
13299 }
13300 else
13301 {
13302 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13303 p += 4;
13304 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13305 p += 4;
13306 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13307 p += 4;
13308 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13309 p += 4;
13310 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13311 p += 4;
13312 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13313 p += 4;
13314 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13315 p += 4;
13316 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13317 p += 4;
13318 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13319 p += 4;
13320 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13321 p += 4;
13322 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13323 p += 4;
13324 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13325 p += 4;
13326 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13327 p += 4;
13328 }
13329 bfd_put_32 (htab->glink->owner, BCTR, p);
13330 p += 4;
13331 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13332 {
13333 bfd_put_32 (htab->glink->owner, NOP, p);
13334 p += 4;
13335 }
13336
13337 /* Build the .glink lazy link call stubs. */
13338 indx = 0;
13339 while (p < htab->glink->contents + htab->glink->rawsize)
13340 {
13341 if (htab->opd_abi)
13342 {
13343 if (indx < 0x8000)
13344 {
13345 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13346 p += 4;
13347 }
13348 else
13349 {
13350 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13351 p += 4;
13352 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13353 p);
13354 p += 4;
13355 }
13356 }
13357 bfd_put_32 (htab->glink->owner,
13358 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13359 indx++;
13360 p += 4;
13361 }
13362
13363 /* Build .glink global entry stubs. */
13364 if (htab->glink->size > htab->glink->rawsize)
13365 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13366 }
13367
13368 if (htab->brlt != NULL && htab->brlt->size != 0)
13369 {
13370 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13371 htab->brlt->size);
13372 if (htab->brlt->contents == NULL)
13373 return FALSE;
13374 }
13375 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13376 {
13377 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13378 htab->relbrlt->size);
13379 if (htab->relbrlt->contents == NULL)
13380 return FALSE;
13381 }
13382
13383 /* Build the stubs as directed by the stub hash table. */
13384 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13385
13386 for (group = htab->group; group != NULL; group = group->next)
13387 if (group->needs_save_res)
13388 {
13389 stub_sec = group->stub_sec;
13390 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13391 htab->sfpr->size);
13392 if (htab->params->emit_stub_syms)
13393 {
13394 unsigned int i;
13395
13396 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13397 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13398 return FALSE;
13399 }
13400 stub_sec->size += htab->sfpr->size;
13401 }
13402
13403 if (htab->relbrlt != NULL)
13404 htab->relbrlt->reloc_count = 0;
13405
13406 if (htab->params->plt_stub_align != 0)
13407 for (group = htab->group; group != NULL; group = group->next)
13408 if ((stub_sec = group->stub_sec) != NULL)
13409 stub_sec->size = ((stub_sec->size
13410 + (1 << htab->params->plt_stub_align) - 1)
13411 & -(1 << htab->params->plt_stub_align));
13412
13413 for (group = htab->group; group != NULL; group = group->next)
13414 if ((stub_sec = group->stub_sec) != NULL)
13415 {
13416 stub_sec_count += 1;
13417 if (stub_sec->rawsize != stub_sec->size
13418 && (htab->stub_iteration <= STUB_SHRINK_ITER
13419 || stub_sec->rawsize < stub_sec->size))
13420 break;
13421 }
13422
13423 if (group != NULL)
13424 {
13425 htab->stub_error = TRUE;
13426 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13427 }
13428
13429 if (htab->stub_error)
13430 return FALSE;
13431
13432 if (stats != NULL)
13433 {
13434 *stats = bfd_malloc (500);
13435 if (*stats == NULL)
13436 return FALSE;
13437
13438 sprintf (*stats, _("linker stubs in %u group%s\n"
13439 " branch %lu\n"
13440 " toc adjust %lu\n"
13441 " long branch %lu\n"
13442 " long toc adj %lu\n"
13443 " plt call %lu\n"
13444 " plt call toc %lu\n"
13445 " global entry %lu"),
13446 stub_sec_count,
13447 stub_sec_count == 1 ? "" : "s",
13448 htab->stub_count[ppc_stub_long_branch - 1],
13449 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13450 htab->stub_count[ppc_stub_plt_branch - 1],
13451 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13452 htab->stub_count[ppc_stub_plt_call - 1],
13453 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13454 htab->stub_count[ppc_stub_global_entry - 1]);
13455 }
13456 return TRUE;
13457 }
13458
13459 /* What to do when ld finds relocations against symbols defined in
13460 discarded sections. */
13461
13462 static unsigned int
13463 ppc64_elf_action_discarded (asection *sec)
13464 {
13465 if (strcmp (".opd", sec->name) == 0)
13466 return 0;
13467
13468 if (strcmp (".toc", sec->name) == 0)
13469 return 0;
13470
13471 if (strcmp (".toc1", sec->name) == 0)
13472 return 0;
13473
13474 return _bfd_elf_default_action_discarded (sec);
13475 }
13476
13477 /* The RELOCATE_SECTION function is called by the ELF backend linker
13478 to handle the relocations for a section.
13479
13480 The relocs are always passed as Rela structures; if the section
13481 actually uses Rel structures, the r_addend field will always be
13482 zero.
13483
13484 This function is responsible for adjust the section contents as
13485 necessary, and (if using Rela relocs and generating a
13486 relocatable output file) adjusting the reloc addend as
13487 necessary.
13488
13489 This function does not have to worry about setting the reloc
13490 address or the reloc symbol index.
13491
13492 LOCAL_SYMS is a pointer to the swapped in local symbols.
13493
13494 LOCAL_SECTIONS is an array giving the section in the input file
13495 corresponding to the st_shndx field of each local symbol.
13496
13497 The global hash table entry for the global symbols can be found
13498 via elf_sym_hashes (input_bfd).
13499
13500 When generating relocatable output, this function must handle
13501 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13502 going to be the section symbol corresponding to the output
13503 section, which means that the addend must be adjusted
13504 accordingly. */
13505
13506 static bfd_boolean
13507 ppc64_elf_relocate_section (bfd *output_bfd,
13508 struct bfd_link_info *info,
13509 bfd *input_bfd,
13510 asection *input_section,
13511 bfd_byte *contents,
13512 Elf_Internal_Rela *relocs,
13513 Elf_Internal_Sym *local_syms,
13514 asection **local_sections)
13515 {
13516 struct ppc_link_hash_table *htab;
13517 Elf_Internal_Shdr *symtab_hdr;
13518 struct elf_link_hash_entry **sym_hashes;
13519 Elf_Internal_Rela *rel;
13520 Elf_Internal_Rela *wrel;
13521 Elf_Internal_Rela *relend;
13522 Elf_Internal_Rela outrel;
13523 bfd_byte *loc;
13524 struct got_entry **local_got_ents;
13525 bfd_vma TOCstart;
13526 bfd_boolean ret = TRUE;
13527 bfd_boolean is_opd;
13528 /* Assume 'at' branch hints. */
13529 bfd_boolean is_isa_v2 = TRUE;
13530 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13531
13532 /* Initialize howto table if needed. */
13533 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13534 ppc_howto_init ();
13535
13536 htab = ppc_hash_table (info);
13537 if (htab == NULL)
13538 return FALSE;
13539
13540 /* Don't relocate stub sections. */
13541 if (input_section->owner == htab->params->stub_bfd)
13542 return TRUE;
13543
13544 BFD_ASSERT (is_ppc64_elf (input_bfd));
13545
13546 local_got_ents = elf_local_got_ents (input_bfd);
13547 TOCstart = elf_gp (output_bfd);
13548 symtab_hdr = &elf_symtab_hdr (input_bfd);
13549 sym_hashes = elf_sym_hashes (input_bfd);
13550 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13551
13552 rel = wrel = relocs;
13553 relend = relocs + input_section->reloc_count;
13554 for (; rel < relend; wrel++, rel++)
13555 {
13556 enum elf_ppc64_reloc_type r_type;
13557 bfd_vma addend;
13558 bfd_reloc_status_type r;
13559 Elf_Internal_Sym *sym;
13560 asection *sec;
13561 struct elf_link_hash_entry *h_elf;
13562 struct ppc_link_hash_entry *h;
13563 struct ppc_link_hash_entry *fdh;
13564 const char *sym_name;
13565 unsigned long r_symndx, toc_symndx;
13566 bfd_vma toc_addend;
13567 unsigned char tls_mask, tls_gd, tls_type;
13568 unsigned char sym_type;
13569 bfd_vma relocation;
13570 bfd_boolean unresolved_reloc;
13571 bfd_boolean warned;
13572 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13573 unsigned int insn;
13574 unsigned int mask;
13575 struct ppc_stub_hash_entry *stub_entry;
13576 bfd_vma max_br_offset;
13577 bfd_vma from;
13578 Elf_Internal_Rela orig_rel;
13579 reloc_howto_type *howto;
13580 struct reloc_howto_struct alt_howto;
13581
13582 again:
13583 orig_rel = *rel;
13584
13585 r_type = ELF64_R_TYPE (rel->r_info);
13586 r_symndx = ELF64_R_SYM (rel->r_info);
13587
13588 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13589 symbol of the previous ADDR64 reloc. The symbol gives us the
13590 proper TOC base to use. */
13591 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13592 && wrel != relocs
13593 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13594 && is_opd)
13595 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13596
13597 sym = NULL;
13598 sec = NULL;
13599 h_elf = NULL;
13600 sym_name = NULL;
13601 unresolved_reloc = FALSE;
13602 warned = FALSE;
13603
13604 if (r_symndx < symtab_hdr->sh_info)
13605 {
13606 /* It's a local symbol. */
13607 struct _opd_sec_data *opd;
13608
13609 sym = local_syms + r_symndx;
13610 sec = local_sections[r_symndx];
13611 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13612 sym_type = ELF64_ST_TYPE (sym->st_info);
13613 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13614 opd = get_opd_info (sec);
13615 if (opd != NULL && opd->adjust != NULL)
13616 {
13617 long adjust = opd->adjust[OPD_NDX (sym->st_value
13618 + rel->r_addend)];
13619 if (adjust == -1)
13620 relocation = 0;
13621 else
13622 {
13623 /* If this is a relocation against the opd section sym
13624 and we have edited .opd, adjust the reloc addend so
13625 that ld -r and ld --emit-relocs output is correct.
13626 If it is a reloc against some other .opd symbol,
13627 then the symbol value will be adjusted later. */
13628 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13629 rel->r_addend += adjust;
13630 else
13631 relocation += adjust;
13632 }
13633 }
13634 }
13635 else
13636 {
13637 bfd_boolean ignored;
13638
13639 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13640 r_symndx, symtab_hdr, sym_hashes,
13641 h_elf, sec, relocation,
13642 unresolved_reloc, warned, ignored);
13643 sym_name = h_elf->root.root.string;
13644 sym_type = h_elf->type;
13645 if (sec != NULL
13646 && sec->owner == output_bfd
13647 && strcmp (sec->name, ".opd") == 0)
13648 {
13649 /* This is a symbol defined in a linker script. All
13650 such are defined in output sections, even those
13651 defined by simple assignment from a symbol defined in
13652 an input section. Transfer the symbol to an
13653 appropriate input .opd section, so that a branch to
13654 this symbol will be mapped to the location specified
13655 by the opd entry. */
13656 struct bfd_link_order *lo;
13657 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13658 if (lo->type == bfd_indirect_link_order)
13659 {
13660 asection *isec = lo->u.indirect.section;
13661 if (h_elf->root.u.def.value >= isec->output_offset
13662 && h_elf->root.u.def.value < (isec->output_offset
13663 + isec->size))
13664 {
13665 h_elf->root.u.def.value -= isec->output_offset;
13666 h_elf->root.u.def.section = isec;
13667 sec = isec;
13668 break;
13669 }
13670 }
13671 }
13672 }
13673 h = (struct ppc_link_hash_entry *) h_elf;
13674
13675 if (sec != NULL && discarded_section (sec))
13676 {
13677 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13678 input_bfd, input_section,
13679 contents + rel->r_offset);
13680 wrel->r_offset = rel->r_offset;
13681 wrel->r_info = 0;
13682 wrel->r_addend = 0;
13683
13684 /* For ld -r, remove relocations in debug sections against
13685 symbols defined in discarded sections. Not done for
13686 non-debug to preserve relocs in .eh_frame which the
13687 eh_frame editing code expects to be present. */
13688 if (bfd_link_relocatable (info)
13689 && (input_section->flags & SEC_DEBUGGING))
13690 wrel--;
13691
13692 continue;
13693 }
13694
13695 if (bfd_link_relocatable (info))
13696 goto copy_reloc;
13697
13698 if (h != NULL && &h->elf == htab->elf.hgot)
13699 {
13700 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13701 sec = bfd_abs_section_ptr;
13702 unresolved_reloc = FALSE;
13703 }
13704
13705 /* TLS optimizations. Replace instruction sequences and relocs
13706 based on information we collected in tls_optimize. We edit
13707 RELOCS so that --emit-relocs will output something sensible
13708 for the final instruction stream. */
13709 tls_mask = 0;
13710 tls_gd = 0;
13711 toc_symndx = 0;
13712 if (h != NULL)
13713 tls_mask = h->tls_mask;
13714 else if (local_got_ents != NULL)
13715 {
13716 struct plt_entry **local_plt = (struct plt_entry **)
13717 (local_got_ents + symtab_hdr->sh_info);
13718 unsigned char *lgot_masks = (unsigned char *)
13719 (local_plt + symtab_hdr->sh_info);
13720 tls_mask = lgot_masks[r_symndx];
13721 }
13722 if (tls_mask == 0
13723 && (r_type == R_PPC64_TLS
13724 || r_type == R_PPC64_TLSGD
13725 || r_type == R_PPC64_TLSLD))
13726 {
13727 /* Check for toc tls entries. */
13728 unsigned char *toc_tls;
13729
13730 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13731 &local_syms, rel, input_bfd))
13732 return FALSE;
13733
13734 if (toc_tls)
13735 tls_mask = *toc_tls;
13736 }
13737
13738 /* Check that tls relocs are used with tls syms, and non-tls
13739 relocs are used with non-tls syms. */
13740 if (r_symndx != STN_UNDEF
13741 && r_type != R_PPC64_NONE
13742 && (h == NULL
13743 || h->elf.root.type == bfd_link_hash_defined
13744 || h->elf.root.type == bfd_link_hash_defweak)
13745 && (IS_PPC64_TLS_RELOC (r_type)
13746 != (sym_type == STT_TLS
13747 || (sym_type == STT_SECTION
13748 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13749 {
13750 if (tls_mask != 0
13751 && (r_type == R_PPC64_TLS
13752 || r_type == R_PPC64_TLSGD
13753 || r_type == R_PPC64_TLSLD))
13754 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13755 ;
13756 else
13757 info->callbacks->einfo
13758 (!IS_PPC64_TLS_RELOC (r_type)
13759 /* xgettext:c-format */
13760 ? _("%H: %s used with TLS symbol `%T'\n")
13761 /* xgettext:c-format */
13762 : _("%H: %s used with non-TLS symbol `%T'\n"),
13763 input_bfd, input_section, rel->r_offset,
13764 ppc64_elf_howto_table[r_type]->name,
13765 sym_name);
13766 }
13767
13768 /* Ensure reloc mapping code below stays sane. */
13769 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13770 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13771 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13772 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13773 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13774 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13775 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13776 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13777 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13778 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13779 abort ();
13780
13781 switch (r_type)
13782 {
13783 default:
13784 break;
13785
13786 case R_PPC64_LO_DS_OPT:
13787 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13788 if ((insn & (0x3f << 26)) != 58u << 26)
13789 abort ();
13790 insn += (14u << 26) - (58u << 26);
13791 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13792 r_type = R_PPC64_TOC16_LO;
13793 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13794 break;
13795
13796 case R_PPC64_TOC16:
13797 case R_PPC64_TOC16_LO:
13798 case R_PPC64_TOC16_DS:
13799 case R_PPC64_TOC16_LO_DS:
13800 {
13801 /* Check for toc tls entries. */
13802 unsigned char *toc_tls;
13803 int retval;
13804
13805 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13806 &local_syms, rel, input_bfd);
13807 if (retval == 0)
13808 return FALSE;
13809
13810 if (toc_tls)
13811 {
13812 tls_mask = *toc_tls;
13813 if (r_type == R_PPC64_TOC16_DS
13814 || r_type == R_PPC64_TOC16_LO_DS)
13815 {
13816 if (tls_mask != 0
13817 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13818 goto toctprel;
13819 }
13820 else
13821 {
13822 /* If we found a GD reloc pair, then we might be
13823 doing a GD->IE transition. */
13824 if (retval == 2)
13825 {
13826 tls_gd = TLS_TPRELGD;
13827 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13828 goto tls_ldgd_opt;
13829 }
13830 else if (retval == 3)
13831 {
13832 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13833 goto tls_ldgd_opt;
13834 }
13835 }
13836 }
13837 }
13838 break;
13839
13840 case R_PPC64_GOT_TPREL16_HI:
13841 case R_PPC64_GOT_TPREL16_HA:
13842 if (tls_mask != 0
13843 && (tls_mask & TLS_TPREL) == 0)
13844 {
13845 rel->r_offset -= d_offset;
13846 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13847 r_type = R_PPC64_NONE;
13848 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13849 }
13850 break;
13851
13852 case R_PPC64_GOT_TPREL16_DS:
13853 case R_PPC64_GOT_TPREL16_LO_DS:
13854 if (tls_mask != 0
13855 && (tls_mask & TLS_TPREL) == 0)
13856 {
13857 toctprel:
13858 insn = bfd_get_32 (input_bfd,
13859 contents + rel->r_offset - d_offset);
13860 insn &= 31 << 21;
13861 insn |= 0x3c0d0000; /* addis 0,13,0 */
13862 bfd_put_32 (input_bfd, insn,
13863 contents + rel->r_offset - d_offset);
13864 r_type = R_PPC64_TPREL16_HA;
13865 if (toc_symndx != 0)
13866 {
13867 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13868 rel->r_addend = toc_addend;
13869 /* We changed the symbol. Start over in order to
13870 get h, sym, sec etc. right. */
13871 goto again;
13872 }
13873 else
13874 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13875 }
13876 break;
13877
13878 case R_PPC64_TLS:
13879 if (tls_mask != 0
13880 && (tls_mask & TLS_TPREL) == 0)
13881 {
13882 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13883 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13884 if (insn == 0)
13885 abort ();
13886 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13887 /* Was PPC64_TLS which sits on insn boundary, now
13888 PPC64_TPREL16_LO which is at low-order half-word. */
13889 rel->r_offset += d_offset;
13890 r_type = R_PPC64_TPREL16_LO;
13891 if (toc_symndx != 0)
13892 {
13893 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13894 rel->r_addend = toc_addend;
13895 /* We changed the symbol. Start over in order to
13896 get h, sym, sec etc. right. */
13897 goto again;
13898 }
13899 else
13900 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13901 }
13902 break;
13903
13904 case R_PPC64_GOT_TLSGD16_HI:
13905 case R_PPC64_GOT_TLSGD16_HA:
13906 tls_gd = TLS_TPRELGD;
13907 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13908 goto tls_gdld_hi;
13909 break;
13910
13911 case R_PPC64_GOT_TLSLD16_HI:
13912 case R_PPC64_GOT_TLSLD16_HA:
13913 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13914 {
13915 tls_gdld_hi:
13916 if ((tls_mask & tls_gd) != 0)
13917 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13918 + R_PPC64_GOT_TPREL16_DS);
13919 else
13920 {
13921 rel->r_offset -= d_offset;
13922 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13923 r_type = R_PPC64_NONE;
13924 }
13925 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13926 }
13927 break;
13928
13929 case R_PPC64_GOT_TLSGD16:
13930 case R_PPC64_GOT_TLSGD16_LO:
13931 tls_gd = TLS_TPRELGD;
13932 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13933 goto tls_ldgd_opt;
13934 break;
13935
13936 case R_PPC64_GOT_TLSLD16:
13937 case R_PPC64_GOT_TLSLD16_LO:
13938 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13939 {
13940 unsigned int insn1, insn2;
13941 bfd_vma offset;
13942
13943 tls_ldgd_opt:
13944 offset = (bfd_vma) -1;
13945 /* If not using the newer R_PPC64_TLSGD/LD to mark
13946 __tls_get_addr calls, we must trust that the call
13947 stays with its arg setup insns, ie. that the next
13948 reloc is the __tls_get_addr call associated with
13949 the current reloc. Edit both insns. */
13950 if (input_section->has_tls_get_addr_call
13951 && rel + 1 < relend
13952 && branch_reloc_hash_match (input_bfd, rel + 1,
13953 htab->tls_get_addr,
13954 htab->tls_get_addr_fd))
13955 offset = rel[1].r_offset;
13956 /* We read the low GOT_TLS (or TOC16) insn because we
13957 need to keep the destination reg. It may be
13958 something other than the usual r3, and moved to r3
13959 before the call by intervening code. */
13960 insn1 = bfd_get_32 (input_bfd,
13961 contents + rel->r_offset - d_offset);
13962 if ((tls_mask & tls_gd) != 0)
13963 {
13964 /* IE */
13965 insn1 &= (0x1f << 21) | (0x1f << 16);
13966 insn1 |= 58 << 26; /* ld */
13967 insn2 = 0x7c636a14; /* add 3,3,13 */
13968 if (offset != (bfd_vma) -1)
13969 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13970 if ((tls_mask & TLS_EXPLICIT) == 0)
13971 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13972 + R_PPC64_GOT_TPREL16_DS);
13973 else
13974 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13975 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13976 }
13977 else
13978 {
13979 /* LE */
13980 insn1 &= 0x1f << 21;
13981 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13982 insn2 = 0x38630000; /* addi 3,3,0 */
13983 if (tls_gd == 0)
13984 {
13985 /* Was an LD reloc. */
13986 if (toc_symndx)
13987 sec = local_sections[toc_symndx];
13988 for (r_symndx = 0;
13989 r_symndx < symtab_hdr->sh_info;
13990 r_symndx++)
13991 if (local_sections[r_symndx] == sec)
13992 break;
13993 if (r_symndx >= symtab_hdr->sh_info)
13994 r_symndx = STN_UNDEF;
13995 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13996 if (r_symndx != STN_UNDEF)
13997 rel->r_addend -= (local_syms[r_symndx].st_value
13998 + sec->output_offset
13999 + sec->output_section->vma);
14000 }
14001 else if (toc_symndx != 0)
14002 {
14003 r_symndx = toc_symndx;
14004 rel->r_addend = toc_addend;
14005 }
14006 r_type = R_PPC64_TPREL16_HA;
14007 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14008 if (offset != (bfd_vma) -1)
14009 {
14010 rel[1].r_info = ELF64_R_INFO (r_symndx,
14011 R_PPC64_TPREL16_LO);
14012 rel[1].r_offset = offset + d_offset;
14013 rel[1].r_addend = rel->r_addend;
14014 }
14015 }
14016 bfd_put_32 (input_bfd, insn1,
14017 contents + rel->r_offset - d_offset);
14018 if (offset != (bfd_vma) -1)
14019 bfd_put_32 (input_bfd, insn2, contents + offset);
14020 if ((tls_mask & tls_gd) == 0
14021 && (tls_gd == 0 || toc_symndx != 0))
14022 {
14023 /* We changed the symbol. Start over in order
14024 to get h, sym, sec etc. right. */
14025 goto again;
14026 }
14027 }
14028 break;
14029
14030 case R_PPC64_TLSGD:
14031 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
14032 {
14033 unsigned int insn2;
14034 bfd_vma offset = rel->r_offset;
14035
14036 if ((tls_mask & TLS_TPRELGD) != 0)
14037 {
14038 /* IE */
14039 r_type = R_PPC64_NONE;
14040 insn2 = 0x7c636a14; /* add 3,3,13 */
14041 }
14042 else
14043 {
14044 /* LE */
14045 if (toc_symndx != 0)
14046 {
14047 r_symndx = toc_symndx;
14048 rel->r_addend = toc_addend;
14049 }
14050 r_type = R_PPC64_TPREL16_LO;
14051 rel->r_offset = offset + d_offset;
14052 insn2 = 0x38630000; /* addi 3,3,0 */
14053 }
14054 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14055 /* Zap the reloc on the _tls_get_addr call too. */
14056 BFD_ASSERT (offset == rel[1].r_offset);
14057 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14058 bfd_put_32 (input_bfd, insn2, contents + offset);
14059 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14060 goto again;
14061 }
14062 break;
14063
14064 case R_PPC64_TLSLD:
14065 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
14066 {
14067 unsigned int insn2;
14068 bfd_vma offset = rel->r_offset;
14069
14070 if (toc_symndx)
14071 sec = local_sections[toc_symndx];
14072 for (r_symndx = 0;
14073 r_symndx < symtab_hdr->sh_info;
14074 r_symndx++)
14075 if (local_sections[r_symndx] == sec)
14076 break;
14077 if (r_symndx >= symtab_hdr->sh_info)
14078 r_symndx = STN_UNDEF;
14079 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14080 if (r_symndx != STN_UNDEF)
14081 rel->r_addend -= (local_syms[r_symndx].st_value
14082 + sec->output_offset
14083 + sec->output_section->vma);
14084
14085 r_type = R_PPC64_TPREL16_LO;
14086 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14087 rel->r_offset = offset + d_offset;
14088 /* Zap the reloc on the _tls_get_addr call too. */
14089 BFD_ASSERT (offset == rel[1].r_offset);
14090 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14091 insn2 = 0x38630000; /* addi 3,3,0 */
14092 bfd_put_32 (input_bfd, insn2, contents + offset);
14093 goto again;
14094 }
14095 break;
14096
14097 case R_PPC64_DTPMOD64:
14098 if (rel + 1 < relend
14099 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14100 && rel[1].r_offset == rel->r_offset + 8)
14101 {
14102 if ((tls_mask & TLS_GD) == 0)
14103 {
14104 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14105 if ((tls_mask & TLS_TPRELGD) != 0)
14106 r_type = R_PPC64_TPREL64;
14107 else
14108 {
14109 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14110 r_type = R_PPC64_NONE;
14111 }
14112 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14113 }
14114 }
14115 else
14116 {
14117 if ((tls_mask & TLS_LD) == 0)
14118 {
14119 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14120 r_type = R_PPC64_NONE;
14121 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14122 }
14123 }
14124 break;
14125
14126 case R_PPC64_TPREL64:
14127 if ((tls_mask & TLS_TPREL) == 0)
14128 {
14129 r_type = R_PPC64_NONE;
14130 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14131 }
14132 break;
14133
14134 case R_PPC64_ENTRY:
14135 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14136 if (!bfd_link_pic (info)
14137 && !info->traditional_format
14138 && relocation + 0x80008000 <= 0xffffffff)
14139 {
14140 unsigned int insn1, insn2;
14141
14142 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14143 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14144 if ((insn1 & ~0xfffc) == LD_R2_0R12
14145 && insn2 == ADD_R2_R2_R12)
14146 {
14147 bfd_put_32 (input_bfd,
14148 LIS_R2 + PPC_HA (relocation),
14149 contents + rel->r_offset);
14150 bfd_put_32 (input_bfd,
14151 ADDI_R2_R2 + PPC_LO (relocation),
14152 contents + rel->r_offset + 4);
14153 }
14154 }
14155 else
14156 {
14157 relocation -= (rel->r_offset
14158 + input_section->output_offset
14159 + input_section->output_section->vma);
14160 if (relocation + 0x80008000 <= 0xffffffff)
14161 {
14162 unsigned int insn1, insn2;
14163
14164 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14165 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14166 if ((insn1 & ~0xfffc) == LD_R2_0R12
14167 && insn2 == ADD_R2_R2_R12)
14168 {
14169 bfd_put_32 (input_bfd,
14170 ADDIS_R2_R12 + PPC_HA (relocation),
14171 contents + rel->r_offset);
14172 bfd_put_32 (input_bfd,
14173 ADDI_R2_R2 + PPC_LO (relocation),
14174 contents + rel->r_offset + 4);
14175 }
14176 }
14177 }
14178 break;
14179
14180 case R_PPC64_REL16_HA:
14181 /* If we are generating a non-PIC executable, edit
14182 . 0: addis 2,12,.TOC.-0b@ha
14183 . addi 2,2,.TOC.-0b@l
14184 used by ELFv2 global entry points to set up r2, to
14185 . lis 2,.TOC.@ha
14186 . addi 2,2,.TOC.@l
14187 if .TOC. is in range. */
14188 if (!bfd_link_pic (info)
14189 && !info->traditional_format
14190 && !htab->opd_abi
14191 && rel->r_addend == d_offset
14192 && h != NULL && &h->elf == htab->elf.hgot
14193 && rel + 1 < relend
14194 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14195 && rel[1].r_offset == rel->r_offset + 4
14196 && rel[1].r_addend == rel->r_addend + 4
14197 && relocation + 0x80008000 <= 0xffffffff)
14198 {
14199 unsigned int insn1, insn2;
14200 bfd_vma offset = rel->r_offset - d_offset;
14201 insn1 = bfd_get_32 (input_bfd, contents + offset);
14202 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14203 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14204 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14205 {
14206 r_type = R_PPC64_ADDR16_HA;
14207 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14208 rel->r_addend -= d_offset;
14209 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14210 rel[1].r_addend -= d_offset + 4;
14211 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14212 }
14213 }
14214 break;
14215 }
14216
14217 /* Handle other relocations that tweak non-addend part of insn. */
14218 insn = 0;
14219 max_br_offset = 1 << 25;
14220 addend = rel->r_addend;
14221 reloc_dest = DEST_NORMAL;
14222 switch (r_type)
14223 {
14224 default:
14225 break;
14226
14227 case R_PPC64_TOCSAVE:
14228 if (relocation + addend == (rel->r_offset
14229 + input_section->output_offset
14230 + input_section->output_section->vma)
14231 && tocsave_find (htab, NO_INSERT,
14232 &local_syms, rel, input_bfd))
14233 {
14234 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14235 if (insn == NOP
14236 || insn == CROR_151515 || insn == CROR_313131)
14237 bfd_put_32 (input_bfd,
14238 STD_R2_0R1 + STK_TOC (htab),
14239 contents + rel->r_offset);
14240 }
14241 break;
14242
14243 /* Branch taken prediction relocations. */
14244 case R_PPC64_ADDR14_BRTAKEN:
14245 case R_PPC64_REL14_BRTAKEN:
14246 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14247 /* Fall through. */
14248
14249 /* Branch not taken prediction relocations. */
14250 case R_PPC64_ADDR14_BRNTAKEN:
14251 case R_PPC64_REL14_BRNTAKEN:
14252 insn |= bfd_get_32 (input_bfd,
14253 contents + rel->r_offset) & ~(0x01 << 21);
14254 /* Fall through. */
14255
14256 case R_PPC64_REL14:
14257 max_br_offset = 1 << 15;
14258 /* Fall through. */
14259
14260 case R_PPC64_REL24:
14261 /* Calls to functions with a different TOC, such as calls to
14262 shared objects, need to alter the TOC pointer. This is
14263 done using a linkage stub. A REL24 branching to these
14264 linkage stubs needs to be followed by a nop, as the nop
14265 will be replaced with an instruction to restore the TOC
14266 base pointer. */
14267 fdh = h;
14268 if (h != NULL
14269 && h->oh != NULL
14270 && h->oh->is_func_descriptor)
14271 fdh = ppc_follow_link (h->oh);
14272 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14273 htab);
14274 if (stub_entry != NULL
14275 && (stub_entry->stub_type == ppc_stub_plt_call
14276 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14277 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14278 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14279 {
14280 bfd_boolean can_plt_call = FALSE;
14281
14282 if (stub_entry->stub_type == ppc_stub_plt_call
14283 && !htab->opd_abi
14284 && htab->params->plt_localentry0 != 0
14285 && is_elfv2_localentry0 (&h->elf))
14286 {
14287 /* The function doesn't use or change r2. */
14288 can_plt_call = TRUE;
14289 }
14290
14291 /* All of these stubs may modify r2, so there must be a
14292 branch and link followed by a nop. The nop is
14293 replaced by an insn to restore r2. */
14294 else if (rel->r_offset + 8 <= input_section->size)
14295 {
14296 unsigned long br;
14297
14298 br = bfd_get_32 (input_bfd,
14299 contents + rel->r_offset);
14300 if ((br & 1) != 0)
14301 {
14302 unsigned long nop;
14303
14304 nop = bfd_get_32 (input_bfd,
14305 contents + rel->r_offset + 4);
14306 if (nop == NOP
14307 || nop == CROR_151515 || nop == CROR_313131)
14308 {
14309 if (h != NULL
14310 && (h == htab->tls_get_addr_fd
14311 || h == htab->tls_get_addr)
14312 && htab->params->tls_get_addr_opt)
14313 {
14314 /* Special stub used, leave nop alone. */
14315 }
14316 else
14317 bfd_put_32 (input_bfd,
14318 LD_R2_0R1 + STK_TOC (htab),
14319 contents + rel->r_offset + 4);
14320 can_plt_call = TRUE;
14321 }
14322 }
14323 }
14324
14325 if (!can_plt_call && h != NULL)
14326 {
14327 const char *name = h->elf.root.root.string;
14328
14329 if (*name == '.')
14330 ++name;
14331
14332 if (strncmp (name, "__libc_start_main", 17) == 0
14333 && (name[17] == 0 || name[17] == '@'))
14334 {
14335 /* Allow crt1 branch to go via a toc adjusting
14336 stub. Other calls that never return could do
14337 the same, if we could detect such. */
14338 can_plt_call = TRUE;
14339 }
14340 }
14341
14342 if (!can_plt_call)
14343 {
14344 /* g++ as of 20130507 emits self-calls without a
14345 following nop. This is arguably wrong since we
14346 have conflicting information. On the one hand a
14347 global symbol and on the other a local call
14348 sequence, but don't error for this special case.
14349 It isn't possible to cheaply verify we have
14350 exactly such a call. Allow all calls to the same
14351 section. */
14352 asection *code_sec = sec;
14353
14354 if (get_opd_info (sec) != NULL)
14355 {
14356 bfd_vma off = (relocation + addend
14357 - sec->output_section->vma
14358 - sec->output_offset);
14359
14360 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14361 }
14362 if (code_sec == input_section)
14363 can_plt_call = TRUE;
14364 }
14365
14366 if (!can_plt_call)
14367 {
14368 if (stub_entry->stub_type == ppc_stub_plt_call
14369 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14370 info->callbacks->einfo
14371 /* xgettext:c-format */
14372 (_("%H: call to `%T' lacks nop, can't restore toc; "
14373 "recompile with -fPIC\n"),
14374 input_bfd, input_section, rel->r_offset, sym_name);
14375 else
14376 info->callbacks->einfo
14377 /* xgettext:c-format */
14378 (_("%H: call to `%T' lacks nop, can't restore toc; "
14379 "(-mcmodel=small toc adjust stub)\n"),
14380 input_bfd, input_section, rel->r_offset, sym_name);
14381
14382 bfd_set_error (bfd_error_bad_value);
14383 ret = FALSE;
14384 }
14385
14386 if (can_plt_call
14387 && (stub_entry->stub_type == ppc_stub_plt_call
14388 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14389 unresolved_reloc = FALSE;
14390 }
14391
14392 if ((stub_entry == NULL
14393 || stub_entry->stub_type == ppc_stub_long_branch
14394 || stub_entry->stub_type == ppc_stub_plt_branch)
14395 && get_opd_info (sec) != NULL)
14396 {
14397 /* The branch destination is the value of the opd entry. */
14398 bfd_vma off = (relocation + addend
14399 - sec->output_section->vma
14400 - sec->output_offset);
14401 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14402 if (dest != (bfd_vma) -1)
14403 {
14404 relocation = dest;
14405 addend = 0;
14406 reloc_dest = DEST_OPD;
14407 }
14408 }
14409
14410 /* If the branch is out of reach we ought to have a long
14411 branch stub. */
14412 from = (rel->r_offset
14413 + input_section->output_offset
14414 + input_section->output_section->vma);
14415
14416 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14417 ? fdh->elf.other
14418 : sym->st_other);
14419
14420 if (stub_entry != NULL
14421 && (stub_entry->stub_type == ppc_stub_long_branch
14422 || stub_entry->stub_type == ppc_stub_plt_branch)
14423 && (r_type == R_PPC64_ADDR14_BRTAKEN
14424 || r_type == R_PPC64_ADDR14_BRNTAKEN
14425 || (relocation + addend - from + max_br_offset
14426 < 2 * max_br_offset)))
14427 /* Don't use the stub if this branch is in range. */
14428 stub_entry = NULL;
14429
14430 if (stub_entry != NULL)
14431 {
14432 /* Munge up the value and addend so that we call the stub
14433 rather than the procedure directly. */
14434 asection *stub_sec = stub_entry->group->stub_sec;
14435
14436 if (stub_entry->stub_type == ppc_stub_save_res)
14437 relocation += (stub_sec->output_offset
14438 + stub_sec->output_section->vma
14439 + stub_sec->size - htab->sfpr->size
14440 - htab->sfpr->output_offset
14441 - htab->sfpr->output_section->vma);
14442 else
14443 relocation = (stub_entry->stub_offset
14444 + stub_sec->output_offset
14445 + stub_sec->output_section->vma);
14446 addend = 0;
14447 reloc_dest = DEST_STUB;
14448
14449 if ((stub_entry->stub_type == ppc_stub_plt_call
14450 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14451 && (ALWAYS_EMIT_R2SAVE
14452 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14453 && rel + 1 < relend
14454 && rel[1].r_offset == rel->r_offset + 4
14455 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14456 relocation += 4;
14457 }
14458
14459 if (insn != 0)
14460 {
14461 if (is_isa_v2)
14462 {
14463 /* Set 'a' bit. This is 0b00010 in BO field for branch
14464 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14465 for branch on CTR insns (BO == 1a00t or 1a01t). */
14466 if ((insn & (0x14 << 21)) == (0x04 << 21))
14467 insn |= 0x02 << 21;
14468 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14469 insn |= 0x08 << 21;
14470 else
14471 break;
14472 }
14473 else
14474 {
14475 /* Invert 'y' bit if not the default. */
14476 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14477 insn ^= 0x01 << 21;
14478 }
14479
14480 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14481 }
14482
14483 /* NOP out calls to undefined weak functions.
14484 We can thus call a weak function without first
14485 checking whether the function is defined. */
14486 else if (h != NULL
14487 && h->elf.root.type == bfd_link_hash_undefweak
14488 && h->elf.dynindx == -1
14489 && r_type == R_PPC64_REL24
14490 && relocation == 0
14491 && addend == 0)
14492 {
14493 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14494 goto copy_reloc;
14495 }
14496 break;
14497 }
14498
14499 /* Set `addend'. */
14500 tls_type = 0;
14501 switch (r_type)
14502 {
14503 default:
14504 info->callbacks->einfo
14505 /* xgettext:c-format */
14506 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14507 input_bfd, (int) r_type, sym_name);
14508
14509 bfd_set_error (bfd_error_bad_value);
14510 ret = FALSE;
14511 goto copy_reloc;
14512
14513 case R_PPC64_NONE:
14514 case R_PPC64_TLS:
14515 case R_PPC64_TLSGD:
14516 case R_PPC64_TLSLD:
14517 case R_PPC64_TOCSAVE:
14518 case R_PPC64_GNU_VTINHERIT:
14519 case R_PPC64_GNU_VTENTRY:
14520 case R_PPC64_ENTRY:
14521 goto copy_reloc;
14522
14523 /* GOT16 relocations. Like an ADDR16 using the symbol's
14524 address in the GOT as relocation value instead of the
14525 symbol's value itself. Also, create a GOT entry for the
14526 symbol and put the symbol value there. */
14527 case R_PPC64_GOT_TLSGD16:
14528 case R_PPC64_GOT_TLSGD16_LO:
14529 case R_PPC64_GOT_TLSGD16_HI:
14530 case R_PPC64_GOT_TLSGD16_HA:
14531 tls_type = TLS_TLS | TLS_GD;
14532 goto dogot;
14533
14534 case R_PPC64_GOT_TLSLD16:
14535 case R_PPC64_GOT_TLSLD16_LO:
14536 case R_PPC64_GOT_TLSLD16_HI:
14537 case R_PPC64_GOT_TLSLD16_HA:
14538 tls_type = TLS_TLS | TLS_LD;
14539 goto dogot;
14540
14541 case R_PPC64_GOT_TPREL16_DS:
14542 case R_PPC64_GOT_TPREL16_LO_DS:
14543 case R_PPC64_GOT_TPREL16_HI:
14544 case R_PPC64_GOT_TPREL16_HA:
14545 tls_type = TLS_TLS | TLS_TPREL;
14546 goto dogot;
14547
14548 case R_PPC64_GOT_DTPREL16_DS:
14549 case R_PPC64_GOT_DTPREL16_LO_DS:
14550 case R_PPC64_GOT_DTPREL16_HI:
14551 case R_PPC64_GOT_DTPREL16_HA:
14552 tls_type = TLS_TLS | TLS_DTPREL;
14553 goto dogot;
14554
14555 case R_PPC64_GOT16:
14556 case R_PPC64_GOT16_LO:
14557 case R_PPC64_GOT16_HI:
14558 case R_PPC64_GOT16_HA:
14559 case R_PPC64_GOT16_DS:
14560 case R_PPC64_GOT16_LO_DS:
14561 dogot:
14562 {
14563 /* Relocation is to the entry for this symbol in the global
14564 offset table. */
14565 asection *got;
14566 bfd_vma *offp;
14567 bfd_vma off;
14568 unsigned long indx = 0;
14569 struct got_entry *ent;
14570
14571 if (tls_type == (TLS_TLS | TLS_LD)
14572 && (h == NULL
14573 || !h->elf.def_dynamic))
14574 ent = ppc64_tlsld_got (input_bfd);
14575 else
14576 {
14577 if (h != NULL)
14578 {
14579 if (!htab->elf.dynamic_sections_created
14580 || h->elf.dynindx == -1
14581 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14582 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14583 /* This is actually a static link, or it is a
14584 -Bsymbolic link and the symbol is defined
14585 locally, or the symbol was forced to be local
14586 because of a version file. */
14587 ;
14588 else
14589 {
14590 indx = h->elf.dynindx;
14591 unresolved_reloc = FALSE;
14592 }
14593 ent = h->elf.got.glist;
14594 }
14595 else
14596 {
14597 if (local_got_ents == NULL)
14598 abort ();
14599 ent = local_got_ents[r_symndx];
14600 }
14601
14602 for (; ent != NULL; ent = ent->next)
14603 if (ent->addend == orig_rel.r_addend
14604 && ent->owner == input_bfd
14605 && ent->tls_type == tls_type)
14606 break;
14607 }
14608
14609 if (ent == NULL)
14610 abort ();
14611 if (ent->is_indirect)
14612 ent = ent->got.ent;
14613 offp = &ent->got.offset;
14614 got = ppc64_elf_tdata (ent->owner)->got;
14615 if (got == NULL)
14616 abort ();
14617
14618 /* The offset must always be a multiple of 8. We use the
14619 least significant bit to record whether we have already
14620 processed this entry. */
14621 off = *offp;
14622 if ((off & 1) != 0)
14623 off &= ~1;
14624 else
14625 {
14626 /* Generate relocs for the dynamic linker, except in
14627 the case of TLSLD where we'll use one entry per
14628 module. */
14629 asection *relgot;
14630 bfd_boolean ifunc;
14631
14632 *offp = off | 1;
14633 relgot = NULL;
14634 ifunc = (h != NULL
14635 ? h->elf.type == STT_GNU_IFUNC
14636 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14637 if (ifunc)
14638 {
14639 relgot = htab->elf.irelplt;
14640 if (indx == 0)
14641 htab->local_ifunc_resolver = 1;
14642 else if (is_static_defined (&h->elf))
14643 htab->maybe_local_ifunc_resolver = 1;
14644 }
14645 else if (indx != 0
14646 || (bfd_link_pic (info)
14647 && (h == NULL
14648 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14649 || (tls_type == (TLS_TLS | TLS_LD)
14650 && !h->elf.def_dynamic))))
14651 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14652 if (relgot != NULL)
14653 {
14654 outrel.r_offset = (got->output_section->vma
14655 + got->output_offset
14656 + off);
14657 outrel.r_addend = addend;
14658 if (tls_type & (TLS_LD | TLS_GD))
14659 {
14660 outrel.r_addend = 0;
14661 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14662 if (tls_type == (TLS_TLS | TLS_GD))
14663 {
14664 loc = relgot->contents;
14665 loc += (relgot->reloc_count++
14666 * sizeof (Elf64_External_Rela));
14667 bfd_elf64_swap_reloca_out (output_bfd,
14668 &outrel, loc);
14669 outrel.r_offset += 8;
14670 outrel.r_addend = addend;
14671 outrel.r_info
14672 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14673 }
14674 }
14675 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14676 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14677 else if (tls_type == (TLS_TLS | TLS_TPREL))
14678 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14679 else if (indx != 0)
14680 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14681 else
14682 {
14683 if (ifunc)
14684 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14685 else
14686 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14687
14688 /* Write the .got section contents for the sake
14689 of prelink. */
14690 loc = got->contents + off;
14691 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14692 loc);
14693 }
14694
14695 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14696 {
14697 outrel.r_addend += relocation;
14698 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14699 {
14700 if (htab->elf.tls_sec == NULL)
14701 outrel.r_addend = 0;
14702 else
14703 outrel.r_addend -= htab->elf.tls_sec->vma;
14704 }
14705 }
14706 loc = relgot->contents;
14707 loc += (relgot->reloc_count++
14708 * sizeof (Elf64_External_Rela));
14709 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14710 }
14711
14712 /* Init the .got section contents here if we're not
14713 emitting a reloc. */
14714 else
14715 {
14716 relocation += addend;
14717 if (tls_type != 0)
14718 {
14719 if (htab->elf.tls_sec == NULL)
14720 relocation = 0;
14721 else
14722 {
14723 if (tls_type & TLS_LD)
14724 relocation = 0;
14725 else
14726 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14727 if (tls_type & TLS_TPREL)
14728 relocation += DTP_OFFSET - TP_OFFSET;
14729 }
14730
14731 if (tls_type & (TLS_GD | TLS_LD))
14732 {
14733 bfd_put_64 (output_bfd, relocation,
14734 got->contents + off + 8);
14735 relocation = 1;
14736 }
14737 }
14738 bfd_put_64 (output_bfd, relocation,
14739 got->contents + off);
14740 }
14741 }
14742
14743 if (off >= (bfd_vma) -2)
14744 abort ();
14745
14746 relocation = got->output_section->vma + got->output_offset + off;
14747 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14748 }
14749 break;
14750
14751 case R_PPC64_PLT16_HA:
14752 case R_PPC64_PLT16_HI:
14753 case R_PPC64_PLT16_LO:
14754 case R_PPC64_PLT32:
14755 case R_PPC64_PLT64:
14756 /* Relocation is to the entry for this symbol in the
14757 procedure linkage table. */
14758 {
14759 struct plt_entry **plt_list = NULL;
14760 if (h != NULL)
14761 plt_list = &h->elf.plt.plist;
14762 else if (local_got_ents != NULL)
14763 {
14764 struct plt_entry **local_plt = (struct plt_entry **)
14765 (local_got_ents + symtab_hdr->sh_info);
14766 unsigned char *local_got_tls_masks = (unsigned char *)
14767 (local_plt + symtab_hdr->sh_info);
14768 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14769 plt_list = local_plt + r_symndx;
14770 }
14771 if (plt_list)
14772 {
14773 struct plt_entry *ent;
14774
14775 for (ent = *plt_list; ent != NULL; ent = ent->next)
14776 if (ent->plt.offset != (bfd_vma) -1
14777 && ent->addend == orig_rel.r_addend)
14778 {
14779 asection *plt;
14780
14781 plt = htab->elf.splt;
14782 if (!htab->elf.dynamic_sections_created
14783 || h == NULL
14784 || h->elf.dynindx == -1)
14785 plt = htab->elf.iplt;
14786 relocation = (plt->output_section->vma
14787 + plt->output_offset
14788 + ent->plt.offset);
14789 addend = 0;
14790 unresolved_reloc = FALSE;
14791 break;
14792 }
14793 }
14794 }
14795 break;
14796
14797 case R_PPC64_TOC:
14798 /* Relocation value is TOC base. */
14799 relocation = TOCstart;
14800 if (r_symndx == STN_UNDEF)
14801 relocation += htab->sec_info[input_section->id].toc_off;
14802 else if (unresolved_reloc)
14803 ;
14804 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14805 relocation += htab->sec_info[sec->id].toc_off;
14806 else
14807 unresolved_reloc = TRUE;
14808 goto dodyn;
14809
14810 /* TOC16 relocs. We want the offset relative to the TOC base,
14811 which is the address of the start of the TOC plus 0x8000.
14812 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14813 in this order. */
14814 case R_PPC64_TOC16:
14815 case R_PPC64_TOC16_LO:
14816 case R_PPC64_TOC16_HI:
14817 case R_PPC64_TOC16_DS:
14818 case R_PPC64_TOC16_LO_DS:
14819 case R_PPC64_TOC16_HA:
14820 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14821 break;
14822
14823 /* Relocate against the beginning of the section. */
14824 case R_PPC64_SECTOFF:
14825 case R_PPC64_SECTOFF_LO:
14826 case R_PPC64_SECTOFF_HI:
14827 case R_PPC64_SECTOFF_DS:
14828 case R_PPC64_SECTOFF_LO_DS:
14829 case R_PPC64_SECTOFF_HA:
14830 if (sec != NULL)
14831 addend -= sec->output_section->vma;
14832 break;
14833
14834 case R_PPC64_REL16:
14835 case R_PPC64_REL16_LO:
14836 case R_PPC64_REL16_HI:
14837 case R_PPC64_REL16_HA:
14838 case R_PPC64_REL16DX_HA:
14839 break;
14840
14841 case R_PPC64_REL14:
14842 case R_PPC64_REL14_BRNTAKEN:
14843 case R_PPC64_REL14_BRTAKEN:
14844 case R_PPC64_REL24:
14845 break;
14846
14847 case R_PPC64_TPREL16:
14848 case R_PPC64_TPREL16_LO:
14849 case R_PPC64_TPREL16_HI:
14850 case R_PPC64_TPREL16_HA:
14851 case R_PPC64_TPREL16_DS:
14852 case R_PPC64_TPREL16_LO_DS:
14853 case R_PPC64_TPREL16_HIGH:
14854 case R_PPC64_TPREL16_HIGHA:
14855 case R_PPC64_TPREL16_HIGHER:
14856 case R_PPC64_TPREL16_HIGHERA:
14857 case R_PPC64_TPREL16_HIGHEST:
14858 case R_PPC64_TPREL16_HIGHESTA:
14859 if (h != NULL
14860 && h->elf.root.type == bfd_link_hash_undefweak
14861 && h->elf.dynindx == -1)
14862 {
14863 /* Make this relocation against an undefined weak symbol
14864 resolve to zero. This is really just a tweak, since
14865 code using weak externs ought to check that they are
14866 defined before using them. */
14867 bfd_byte *p = contents + rel->r_offset - d_offset;
14868
14869 insn = bfd_get_32 (input_bfd, p);
14870 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14871 if (insn != 0)
14872 bfd_put_32 (input_bfd, insn, p);
14873 break;
14874 }
14875 if (htab->elf.tls_sec != NULL)
14876 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14877 /* The TPREL16 relocs shouldn't really be used in shared
14878 libs or with non-local symbols as that will result in
14879 DT_TEXTREL being set, but support them anyway. */
14880 goto dodyn;
14881
14882 case R_PPC64_DTPREL16:
14883 case R_PPC64_DTPREL16_LO:
14884 case R_PPC64_DTPREL16_HI:
14885 case R_PPC64_DTPREL16_HA:
14886 case R_PPC64_DTPREL16_DS:
14887 case R_PPC64_DTPREL16_LO_DS:
14888 case R_PPC64_DTPREL16_HIGH:
14889 case R_PPC64_DTPREL16_HIGHA:
14890 case R_PPC64_DTPREL16_HIGHER:
14891 case R_PPC64_DTPREL16_HIGHERA:
14892 case R_PPC64_DTPREL16_HIGHEST:
14893 case R_PPC64_DTPREL16_HIGHESTA:
14894 if (htab->elf.tls_sec != NULL)
14895 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14896 break;
14897
14898 case R_PPC64_ADDR64_LOCAL:
14899 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14900 ? h->elf.other
14901 : sym->st_other);
14902 break;
14903
14904 case R_PPC64_DTPMOD64:
14905 relocation = 1;
14906 addend = 0;
14907 goto dodyn;
14908
14909 case R_PPC64_TPREL64:
14910 if (htab->elf.tls_sec != NULL)
14911 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14912 goto dodyn;
14913
14914 case R_PPC64_DTPREL64:
14915 if (htab->elf.tls_sec != NULL)
14916 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14917 /* Fall through. */
14918
14919 /* Relocations that may need to be propagated if this is a
14920 dynamic object. */
14921 case R_PPC64_REL30:
14922 case R_PPC64_REL32:
14923 case R_PPC64_REL64:
14924 case R_PPC64_ADDR14:
14925 case R_PPC64_ADDR14_BRNTAKEN:
14926 case R_PPC64_ADDR14_BRTAKEN:
14927 case R_PPC64_ADDR16:
14928 case R_PPC64_ADDR16_DS:
14929 case R_PPC64_ADDR16_HA:
14930 case R_PPC64_ADDR16_HI:
14931 case R_PPC64_ADDR16_HIGH:
14932 case R_PPC64_ADDR16_HIGHA:
14933 case R_PPC64_ADDR16_HIGHER:
14934 case R_PPC64_ADDR16_HIGHERA:
14935 case R_PPC64_ADDR16_HIGHEST:
14936 case R_PPC64_ADDR16_HIGHESTA:
14937 case R_PPC64_ADDR16_LO:
14938 case R_PPC64_ADDR16_LO_DS:
14939 case R_PPC64_ADDR24:
14940 case R_PPC64_ADDR32:
14941 case R_PPC64_ADDR64:
14942 case R_PPC64_UADDR16:
14943 case R_PPC64_UADDR32:
14944 case R_PPC64_UADDR64:
14945 dodyn:
14946 if ((input_section->flags & SEC_ALLOC) == 0)
14947 break;
14948
14949 if (NO_OPD_RELOCS && is_opd)
14950 break;
14951
14952 if (bfd_link_pic (info)
14953 ? ((h == NULL
14954 || h->dyn_relocs != NULL)
14955 && ((h != NULL && pc_dynrelocs (h))
14956 || must_be_dyn_reloc (info, r_type)))
14957 : (h != NULL
14958 ? h->dyn_relocs != NULL
14959 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14960 {
14961 bfd_boolean skip, relocate;
14962 asection *sreloc;
14963 bfd_vma out_off;
14964 long indx = 0;
14965
14966 /* When generating a dynamic object, these relocations
14967 are copied into the output file to be resolved at run
14968 time. */
14969
14970 skip = FALSE;
14971 relocate = FALSE;
14972
14973 out_off = _bfd_elf_section_offset (output_bfd, info,
14974 input_section, rel->r_offset);
14975 if (out_off == (bfd_vma) -1)
14976 skip = TRUE;
14977 else if (out_off == (bfd_vma) -2)
14978 skip = TRUE, relocate = TRUE;
14979 out_off += (input_section->output_section->vma
14980 + input_section->output_offset);
14981 outrel.r_offset = out_off;
14982 outrel.r_addend = rel->r_addend;
14983
14984 /* Optimize unaligned reloc use. */
14985 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14986 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14987 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14988 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14989 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14990 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14991 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14992 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14993 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14994
14995 if (skip)
14996 memset (&outrel, 0, sizeof outrel);
14997 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14998 && !is_opd
14999 && r_type != R_PPC64_TOC)
15000 {
15001 indx = h->elf.dynindx;
15002 BFD_ASSERT (indx != -1);
15003 outrel.r_info = ELF64_R_INFO (indx, r_type);
15004 }
15005 else
15006 {
15007 /* This symbol is local, or marked to become local,
15008 or this is an opd section reloc which must point
15009 at a local function. */
15010 outrel.r_addend += relocation;
15011 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
15012 {
15013 if (is_opd && h != NULL)
15014 {
15015 /* Lie about opd entries. This case occurs
15016 when building shared libraries and we
15017 reference a function in another shared
15018 lib. The same thing happens for a weak
15019 definition in an application that's
15020 overridden by a strong definition in a
15021 shared lib. (I believe this is a generic
15022 bug in binutils handling of weak syms.)
15023 In these cases we won't use the opd
15024 entry in this lib. */
15025 unresolved_reloc = FALSE;
15026 }
15027 if (!is_opd
15028 && r_type == R_PPC64_ADDR64
15029 && (h != NULL
15030 ? h->elf.type == STT_GNU_IFUNC
15031 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15032 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15033 else
15034 {
15035 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15036
15037 /* We need to relocate .opd contents for ld.so.
15038 Prelink also wants simple and consistent rules
15039 for relocs. This make all RELATIVE relocs have
15040 *r_offset equal to r_addend. */
15041 relocate = TRUE;
15042 }
15043 }
15044 else
15045 {
15046 if (h != NULL
15047 ? h->elf.type == STT_GNU_IFUNC
15048 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15049 {
15050 info->callbacks->einfo
15051 /* xgettext:c-format */
15052 (_("%H: %s for indirect "
15053 "function `%T' unsupported\n"),
15054 input_bfd, input_section, rel->r_offset,
15055 ppc64_elf_howto_table[r_type]->name,
15056 sym_name);
15057 ret = FALSE;
15058 }
15059 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15060 ;
15061 else if (sec == NULL || sec->owner == NULL)
15062 {
15063 bfd_set_error (bfd_error_bad_value);
15064 return FALSE;
15065 }
15066 else
15067 {
15068 asection *osec;
15069
15070 osec = sec->output_section;
15071 indx = elf_section_data (osec)->dynindx;
15072
15073 if (indx == 0)
15074 {
15075 if ((osec->flags & SEC_READONLY) == 0
15076 && htab->elf.data_index_section != NULL)
15077 osec = htab->elf.data_index_section;
15078 else
15079 osec = htab->elf.text_index_section;
15080 indx = elf_section_data (osec)->dynindx;
15081 }
15082 BFD_ASSERT (indx != 0);
15083
15084 /* We are turning this relocation into one
15085 against a section symbol, so subtract out
15086 the output section's address but not the
15087 offset of the input section in the output
15088 section. */
15089 outrel.r_addend -= osec->vma;
15090 }
15091
15092 outrel.r_info = ELF64_R_INFO (indx, r_type);
15093 }
15094 }
15095
15096 sreloc = elf_section_data (input_section)->sreloc;
15097 if (h != NULL
15098 ? h->elf.type == STT_GNU_IFUNC
15099 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15100 {
15101 sreloc = htab->elf.irelplt;
15102 if (indx == 0)
15103 htab->local_ifunc_resolver = 1;
15104 else if (is_static_defined (&h->elf))
15105 htab->maybe_local_ifunc_resolver = 1;
15106 }
15107 if (sreloc == NULL)
15108 abort ();
15109
15110 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15111 >= sreloc->size)
15112 abort ();
15113 loc = sreloc->contents;
15114 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15115 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15116
15117 /* If this reloc is against an external symbol, it will
15118 be computed at runtime, so there's no need to do
15119 anything now. However, for the sake of prelink ensure
15120 that the section contents are a known value. */
15121 if (! relocate)
15122 {
15123 unresolved_reloc = FALSE;
15124 /* The value chosen here is quite arbitrary as ld.so
15125 ignores section contents except for the special
15126 case of .opd where the contents might be accessed
15127 before relocation. Choose zero, as that won't
15128 cause reloc overflow. */
15129 relocation = 0;
15130 addend = 0;
15131 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15132 to improve backward compatibility with older
15133 versions of ld. */
15134 if (r_type == R_PPC64_ADDR64)
15135 addend = outrel.r_addend;
15136 /* Adjust pc_relative relocs to have zero in *r_offset. */
15137 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15138 addend = outrel.r_offset;
15139 }
15140 }
15141 break;
15142
15143 case R_PPC64_COPY:
15144 case R_PPC64_GLOB_DAT:
15145 case R_PPC64_JMP_SLOT:
15146 case R_PPC64_JMP_IREL:
15147 case R_PPC64_RELATIVE:
15148 /* We shouldn't ever see these dynamic relocs in relocatable
15149 files. */
15150 /* Fall through. */
15151
15152 case R_PPC64_PLTGOT16:
15153 case R_PPC64_PLTGOT16_DS:
15154 case R_PPC64_PLTGOT16_HA:
15155 case R_PPC64_PLTGOT16_HI:
15156 case R_PPC64_PLTGOT16_LO:
15157 case R_PPC64_PLTGOT16_LO_DS:
15158 case R_PPC64_PLTREL32:
15159 case R_PPC64_PLTREL64:
15160 /* These ones haven't been implemented yet. */
15161
15162 info->callbacks->einfo
15163 /* xgettext:c-format */
15164 (_("%P: %B: %s is not supported for `%T'\n"),
15165 input_bfd,
15166 ppc64_elf_howto_table[r_type]->name, sym_name);
15167
15168 bfd_set_error (bfd_error_invalid_operation);
15169 ret = FALSE;
15170 goto copy_reloc;
15171 }
15172
15173 /* Multi-instruction sequences that access the TOC can be
15174 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15175 to nop; addi rb,r2,x; */
15176 howto = ppc64_elf_howto_table[(int) r_type];
15177 switch (r_type)
15178 {
15179 default:
15180 break;
15181
15182 case R_PPC64_GOT_TLSLD16_HI:
15183 case R_PPC64_GOT_TLSGD16_HI:
15184 case R_PPC64_GOT_TPREL16_HI:
15185 case R_PPC64_GOT_DTPREL16_HI:
15186 case R_PPC64_GOT16_HI:
15187 case R_PPC64_TOC16_HI:
15188 /* These relocs would only be useful if building up an
15189 offset to later add to r2, perhaps in an indexed
15190 addressing mode instruction. Don't try to optimize.
15191 Unfortunately, the possibility of someone building up an
15192 offset like this or even with the HA relocs, means that
15193 we need to check the high insn when optimizing the low
15194 insn. */
15195 break;
15196
15197 case R_PPC64_GOT_TLSLD16_HA:
15198 case R_PPC64_GOT_TLSGD16_HA:
15199 case R_PPC64_GOT_TPREL16_HA:
15200 case R_PPC64_GOT_DTPREL16_HA:
15201 case R_PPC64_GOT16_HA:
15202 case R_PPC64_TOC16_HA:
15203 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15204 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15205 {
15206 bfd_byte *p = contents + (rel->r_offset & ~3);
15207 bfd_put_32 (input_bfd, NOP, p);
15208 }
15209 break;
15210
15211 case R_PPC64_GOT_TLSLD16_LO:
15212 case R_PPC64_GOT_TLSGD16_LO:
15213 case R_PPC64_GOT_TPREL16_LO_DS:
15214 case R_PPC64_GOT_DTPREL16_LO_DS:
15215 case R_PPC64_GOT16_LO:
15216 case R_PPC64_GOT16_LO_DS:
15217 case R_PPC64_TOC16_LO:
15218 case R_PPC64_TOC16_LO_DS:
15219 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15220 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15221 {
15222 bfd_byte *p = contents + (rel->r_offset & ~3);
15223 insn = bfd_get_32 (input_bfd, p);
15224 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15225 {
15226 /* Transform addic to addi when we change reg. */
15227 insn &= ~((0x3f << 26) | (0x1f << 16));
15228 insn |= (14u << 26) | (2 << 16);
15229 }
15230 else
15231 {
15232 insn &= ~(0x1f << 16);
15233 insn |= 2 << 16;
15234 }
15235 bfd_put_32 (input_bfd, insn, p);
15236 }
15237 break;
15238
15239 case R_PPC64_TPREL16_HA:
15240 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15241 {
15242 bfd_byte *p = contents + (rel->r_offset & ~3);
15243 insn = bfd_get_32 (input_bfd, p);
15244 if ((insn & ((0x3f << 26) | 0x1f << 16))
15245 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15246 /* xgettext:c-format */
15247 info->callbacks->minfo
15248 (_("%H: warning: %s unexpected insn %#x.\n"),
15249 input_bfd, input_section, rel->r_offset, howto->name, insn);
15250 else
15251 bfd_put_32 (input_bfd, NOP, p);
15252 }
15253 break;
15254
15255 case R_PPC64_TPREL16_LO:
15256 case R_PPC64_TPREL16_LO_DS:
15257 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15258 {
15259 bfd_byte *p = contents + (rel->r_offset & ~3);
15260 insn = bfd_get_32 (input_bfd, p);
15261 insn &= ~(0x1f << 16);
15262 insn |= 13 << 16;
15263 bfd_put_32 (input_bfd, insn, p);
15264 }
15265 break;
15266 }
15267
15268 /* Do any further special processing. */
15269 switch (r_type)
15270 {
15271 default:
15272 break;
15273
15274 case R_PPC64_REL16_HA:
15275 case R_PPC64_REL16DX_HA:
15276 case R_PPC64_ADDR16_HA:
15277 case R_PPC64_ADDR16_HIGHA:
15278 case R_PPC64_ADDR16_HIGHERA:
15279 case R_PPC64_ADDR16_HIGHESTA:
15280 case R_PPC64_TOC16_HA:
15281 case R_PPC64_SECTOFF_HA:
15282 case R_PPC64_TPREL16_HA:
15283 case R_PPC64_TPREL16_HIGHA:
15284 case R_PPC64_TPREL16_HIGHERA:
15285 case R_PPC64_TPREL16_HIGHESTA:
15286 case R_PPC64_DTPREL16_HA:
15287 case R_PPC64_DTPREL16_HIGHA:
15288 case R_PPC64_DTPREL16_HIGHERA:
15289 case R_PPC64_DTPREL16_HIGHESTA:
15290 /* It's just possible that this symbol is a weak symbol
15291 that's not actually defined anywhere. In that case,
15292 'sec' would be NULL, and we should leave the symbol
15293 alone (it will be set to zero elsewhere in the link). */
15294 if (sec == NULL)
15295 break;
15296 /* Fall through. */
15297
15298 case R_PPC64_GOT16_HA:
15299 case R_PPC64_PLTGOT16_HA:
15300 case R_PPC64_PLT16_HA:
15301 case R_PPC64_GOT_TLSGD16_HA:
15302 case R_PPC64_GOT_TLSLD16_HA:
15303 case R_PPC64_GOT_TPREL16_HA:
15304 case R_PPC64_GOT_DTPREL16_HA:
15305 /* Add 0x10000 if sign bit in 0:15 is set.
15306 Bits 0:15 are not used. */
15307 addend += 0x8000;
15308 break;
15309
15310 case R_PPC64_ADDR16_DS:
15311 case R_PPC64_ADDR16_LO_DS:
15312 case R_PPC64_GOT16_DS:
15313 case R_PPC64_GOT16_LO_DS:
15314 case R_PPC64_PLT16_LO_DS:
15315 case R_PPC64_SECTOFF_DS:
15316 case R_PPC64_SECTOFF_LO_DS:
15317 case R_PPC64_TOC16_DS:
15318 case R_PPC64_TOC16_LO_DS:
15319 case R_PPC64_PLTGOT16_DS:
15320 case R_PPC64_PLTGOT16_LO_DS:
15321 case R_PPC64_GOT_TPREL16_DS:
15322 case R_PPC64_GOT_TPREL16_LO_DS:
15323 case R_PPC64_GOT_DTPREL16_DS:
15324 case R_PPC64_GOT_DTPREL16_LO_DS:
15325 case R_PPC64_TPREL16_DS:
15326 case R_PPC64_TPREL16_LO_DS:
15327 case R_PPC64_DTPREL16_DS:
15328 case R_PPC64_DTPREL16_LO_DS:
15329 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15330 mask = 3;
15331 /* If this reloc is against an lq, lxv, or stxv insn, then
15332 the value must be a multiple of 16. This is somewhat of
15333 a hack, but the "correct" way to do this by defining _DQ
15334 forms of all the _DS relocs bloats all reloc switches in
15335 this file. It doesn't make much sense to use these
15336 relocs in data, so testing the insn should be safe. */
15337 if ((insn & (0x3f << 26)) == (56u << 26)
15338 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15339 mask = 15;
15340 relocation += addend;
15341 addend = insn & (mask ^ 3);
15342 if ((relocation & mask) != 0)
15343 {
15344 relocation ^= relocation & mask;
15345 info->callbacks->einfo
15346 /* xgettext:c-format */
15347 (_("%H: error: %s not a multiple of %u\n"),
15348 input_bfd, input_section, rel->r_offset,
15349 howto->name,
15350 mask + 1);
15351 bfd_set_error (bfd_error_bad_value);
15352 ret = FALSE;
15353 goto copy_reloc;
15354 }
15355 break;
15356 }
15357
15358 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15359 because such sections are not SEC_ALLOC and thus ld.so will
15360 not process them. */
15361 if (unresolved_reloc
15362 && !((input_section->flags & SEC_DEBUGGING) != 0
15363 && h->elf.def_dynamic)
15364 && _bfd_elf_section_offset (output_bfd, info, input_section,
15365 rel->r_offset) != (bfd_vma) -1)
15366 {
15367 info->callbacks->einfo
15368 /* xgettext:c-format */
15369 (_("%H: unresolvable %s against `%T'\n"),
15370 input_bfd, input_section, rel->r_offset,
15371 howto->name,
15372 h->elf.root.root.string);
15373 ret = FALSE;
15374 }
15375
15376 /* 16-bit fields in insns mostly have signed values, but a
15377 few insns have 16-bit unsigned values. Really, we should
15378 have different reloc types. */
15379 if (howto->complain_on_overflow != complain_overflow_dont
15380 && howto->dst_mask == 0xffff
15381 && (input_section->flags & SEC_CODE) != 0)
15382 {
15383 enum complain_overflow complain = complain_overflow_signed;
15384
15385 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15386 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15387 complain = complain_overflow_bitfield;
15388 else if (howto->rightshift == 0
15389 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15390 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15391 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15392 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15393 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15394 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15395 complain = complain_overflow_unsigned;
15396 if (howto->complain_on_overflow != complain)
15397 {
15398 alt_howto = *howto;
15399 alt_howto.complain_on_overflow = complain;
15400 howto = &alt_howto;
15401 }
15402 }
15403
15404 if (r_type == R_PPC64_REL16DX_HA)
15405 {
15406 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15407 if (rel->r_offset + 4 > input_section->size)
15408 r = bfd_reloc_outofrange;
15409 else
15410 {
15411 relocation += addend;
15412 relocation -= (rel->r_offset
15413 + input_section->output_offset
15414 + input_section->output_section->vma);
15415 relocation = (bfd_signed_vma) relocation >> 16;
15416 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15417 insn &= ~0x1fffc1;
15418 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15419 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15420 r = bfd_reloc_ok;
15421 if (relocation + 0x8000 > 0xffff)
15422 r = bfd_reloc_overflow;
15423 }
15424 }
15425 else
15426 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15427 rel->r_offset, relocation, addend);
15428
15429 if (r != bfd_reloc_ok)
15430 {
15431 char *more_info = NULL;
15432 const char *reloc_name = howto->name;
15433
15434 if (reloc_dest != DEST_NORMAL)
15435 {
15436 more_info = bfd_malloc (strlen (reloc_name) + 8);
15437 if (more_info != NULL)
15438 {
15439 strcpy (more_info, reloc_name);
15440 strcat (more_info, (reloc_dest == DEST_OPD
15441 ? " (OPD)" : " (stub)"));
15442 reloc_name = more_info;
15443 }
15444 }
15445
15446 if (r == bfd_reloc_overflow)
15447 {
15448 /* On code like "if (foo) foo();" don't report overflow
15449 on a branch to zero when foo is undefined. */
15450 if (!warned
15451 && (reloc_dest == DEST_STUB
15452 || !(h != NULL
15453 && (h->elf.root.type == bfd_link_hash_undefweak
15454 || h->elf.root.type == bfd_link_hash_undefined)
15455 && is_branch_reloc (r_type))))
15456 info->callbacks->reloc_overflow (info, &h->elf.root,
15457 sym_name, reloc_name,
15458 orig_rel.r_addend,
15459 input_bfd, input_section,
15460 rel->r_offset);
15461 }
15462 else
15463 {
15464 info->callbacks->einfo
15465 /* xgettext:c-format */
15466 (_("%H: %s against `%T': error %d\n"),
15467 input_bfd, input_section, rel->r_offset,
15468 reloc_name, sym_name, (int) r);
15469 ret = FALSE;
15470 }
15471 if (more_info != NULL)
15472 free (more_info);
15473 }
15474 copy_reloc:
15475 if (wrel != rel)
15476 *wrel = *rel;
15477 }
15478
15479 if (wrel != rel)
15480 {
15481 Elf_Internal_Shdr *rel_hdr;
15482 size_t deleted = rel - wrel;
15483
15484 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15485 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15486 if (rel_hdr->sh_size == 0)
15487 {
15488 /* It is too late to remove an empty reloc section. Leave
15489 one NONE reloc.
15490 ??? What is wrong with an empty section??? */
15491 rel_hdr->sh_size = rel_hdr->sh_entsize;
15492 deleted -= 1;
15493 }
15494 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15495 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15496 input_section->reloc_count -= deleted;
15497 }
15498
15499 /* If we're emitting relocations, then shortly after this function
15500 returns, reloc offsets and addends for this section will be
15501 adjusted. Worse, reloc symbol indices will be for the output
15502 file rather than the input. Save a copy of the relocs for
15503 opd_entry_value. */
15504 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15505 {
15506 bfd_size_type amt;
15507 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15508 rel = bfd_alloc (input_bfd, amt);
15509 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15510 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15511 if (rel == NULL)
15512 return FALSE;
15513 memcpy (rel, relocs, amt);
15514 }
15515 return ret;
15516 }
15517
15518 /* Adjust the value of any local symbols in opd sections. */
15519
15520 static int
15521 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15522 const char *name ATTRIBUTE_UNUSED,
15523 Elf_Internal_Sym *elfsym,
15524 asection *input_sec,
15525 struct elf_link_hash_entry *h)
15526 {
15527 struct _opd_sec_data *opd;
15528 long adjust;
15529 bfd_vma value;
15530
15531 if (h != NULL)
15532 return 1;
15533
15534 opd = get_opd_info (input_sec);
15535 if (opd == NULL || opd->adjust == NULL)
15536 return 1;
15537
15538 value = elfsym->st_value - input_sec->output_offset;
15539 if (!bfd_link_relocatable (info))
15540 value -= input_sec->output_section->vma;
15541
15542 adjust = opd->adjust[OPD_NDX (value)];
15543 if (adjust == -1)
15544 return 2;
15545
15546 elfsym->st_value += adjust;
15547 return 1;
15548 }
15549
15550 /* Finish up dynamic symbol handling. We set the contents of various
15551 dynamic sections here. */
15552
15553 static bfd_boolean
15554 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15555 struct bfd_link_info *info,
15556 struct elf_link_hash_entry *h,
15557 Elf_Internal_Sym *sym)
15558 {
15559 struct ppc_link_hash_table *htab;
15560 struct plt_entry *ent;
15561 Elf_Internal_Rela rela;
15562 bfd_byte *loc;
15563
15564 htab = ppc_hash_table (info);
15565 if (htab == NULL)
15566 return FALSE;
15567
15568 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15569 if (ent->plt.offset != (bfd_vma) -1)
15570 {
15571 /* This symbol has an entry in the procedure linkage
15572 table. Set it up. */
15573 if (!htab->elf.dynamic_sections_created
15574 || h->dynindx == -1)
15575 {
15576 BFD_ASSERT (h->type == STT_GNU_IFUNC
15577 && h->def_regular
15578 && (h->root.type == bfd_link_hash_defined
15579 || h->root.type == bfd_link_hash_defweak));
15580 rela.r_offset = (htab->elf.iplt->output_section->vma
15581 + htab->elf.iplt->output_offset
15582 + ent->plt.offset);
15583 if (htab->opd_abi)
15584 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15585 else
15586 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15587 rela.r_addend = (h->root.u.def.value
15588 + h->root.u.def.section->output_offset
15589 + h->root.u.def.section->output_section->vma
15590 + ent->addend);
15591 loc = (htab->elf.irelplt->contents
15592 + (htab->elf.irelplt->reloc_count++
15593 * sizeof (Elf64_External_Rela)));
15594 htab->local_ifunc_resolver = 1;
15595 }
15596 else
15597 {
15598 rela.r_offset = (htab->elf.splt->output_section->vma
15599 + htab->elf.splt->output_offset
15600 + ent->plt.offset);
15601 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15602 rela.r_addend = ent->addend;
15603 loc = (htab->elf.srelplt->contents
15604 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15605 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15606 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15607 htab->maybe_local_ifunc_resolver = 1;
15608 }
15609 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15610
15611 if (!htab->opd_abi)
15612 {
15613 if (!h->def_regular)
15614 {
15615 /* Mark the symbol as undefined, rather than as
15616 defined in glink. Leave the value if there were
15617 any relocations where pointer equality matters
15618 (this is a clue for the dynamic linker, to make
15619 function pointer comparisons work between an
15620 application and shared library), otherwise set it
15621 to zero. */
15622 sym->st_shndx = SHN_UNDEF;
15623 if (!h->pointer_equality_needed)
15624 sym->st_value = 0;
15625 else if (!h->ref_regular_nonweak)
15626 {
15627 /* This breaks function pointer comparisons, but
15628 that is better than breaking tests for a NULL
15629 function pointer. */
15630 sym->st_value = 0;
15631 }
15632 }
15633 }
15634 }
15635
15636 if (h->needs_copy)
15637 {
15638 /* This symbol needs a copy reloc. Set it up. */
15639 asection *srel;
15640
15641 if (h->dynindx == -1
15642 || (h->root.type != bfd_link_hash_defined
15643 && h->root.type != bfd_link_hash_defweak)
15644 || htab->elf.srelbss == NULL
15645 || htab->elf.sreldynrelro == NULL)
15646 abort ();
15647
15648 rela.r_offset = (h->root.u.def.value
15649 + h->root.u.def.section->output_section->vma
15650 + h->root.u.def.section->output_offset);
15651 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15652 rela.r_addend = 0;
15653 if (h->root.u.def.section == htab->elf.sdynrelro)
15654 srel = htab->elf.sreldynrelro;
15655 else
15656 srel = htab->elf.srelbss;
15657 loc = srel->contents;
15658 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15659 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15660 }
15661
15662 return TRUE;
15663 }
15664
15665 /* Used to decide how to sort relocs in an optimal manner for the
15666 dynamic linker, before writing them out. */
15667
15668 static enum elf_reloc_type_class
15669 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15670 const asection *rel_sec,
15671 const Elf_Internal_Rela *rela)
15672 {
15673 enum elf_ppc64_reloc_type r_type;
15674 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15675
15676 if (rel_sec == htab->elf.irelplt)
15677 return reloc_class_ifunc;
15678
15679 r_type = ELF64_R_TYPE (rela->r_info);
15680 switch (r_type)
15681 {
15682 case R_PPC64_RELATIVE:
15683 return reloc_class_relative;
15684 case R_PPC64_JMP_SLOT:
15685 return reloc_class_plt;
15686 case R_PPC64_COPY:
15687 return reloc_class_copy;
15688 default:
15689 return reloc_class_normal;
15690 }
15691 }
15692
15693 /* Finish up the dynamic sections. */
15694
15695 static bfd_boolean
15696 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15697 struct bfd_link_info *info)
15698 {
15699 struct ppc_link_hash_table *htab;
15700 bfd *dynobj;
15701 asection *sdyn;
15702
15703 htab = ppc_hash_table (info);
15704 if (htab == NULL)
15705 return FALSE;
15706
15707 dynobj = htab->elf.dynobj;
15708 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15709
15710 if (htab->elf.dynamic_sections_created)
15711 {
15712 Elf64_External_Dyn *dyncon, *dynconend;
15713
15714 if (sdyn == NULL || htab->elf.sgot == NULL)
15715 abort ();
15716
15717 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15718 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15719 for (; dyncon < dynconend; dyncon++)
15720 {
15721 Elf_Internal_Dyn dyn;
15722 asection *s;
15723
15724 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15725
15726 switch (dyn.d_tag)
15727 {
15728 default:
15729 continue;
15730
15731 case DT_PPC64_GLINK:
15732 s = htab->glink;
15733 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15734 /* We stupidly defined DT_PPC64_GLINK to be the start
15735 of glink rather than the first entry point, which is
15736 what ld.so needs, and now have a bigger stub to
15737 support automatic multiple TOCs. */
15738 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15739 break;
15740
15741 case DT_PPC64_OPD:
15742 s = bfd_get_section_by_name (output_bfd, ".opd");
15743 if (s == NULL)
15744 continue;
15745 dyn.d_un.d_ptr = s->vma;
15746 break;
15747
15748 case DT_PPC64_OPT:
15749 if (htab->do_multi_toc && htab->multi_toc_needed)
15750 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15751 if (htab->has_plt_localentry0)
15752 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15753 break;
15754
15755 case DT_PPC64_OPDSZ:
15756 s = bfd_get_section_by_name (output_bfd, ".opd");
15757 if (s == NULL)
15758 continue;
15759 dyn.d_un.d_val = s->size;
15760 break;
15761
15762 case DT_PLTGOT:
15763 s = htab->elf.splt;
15764 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15765 break;
15766
15767 case DT_JMPREL:
15768 s = htab->elf.srelplt;
15769 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15770 break;
15771
15772 case DT_PLTRELSZ:
15773 dyn.d_un.d_val = htab->elf.srelplt->size;
15774 break;
15775
15776 case DT_TEXTREL:
15777 if (htab->local_ifunc_resolver)
15778 info->callbacks->einfo
15779 (_("%X%P: text relocations and GNU indirect "
15780 "functions will result in a segfault at runtime\n"));
15781 else if (htab->maybe_local_ifunc_resolver)
15782 info->callbacks->einfo
15783 (_("%P: warning: text relocations and GNU indirect "
15784 "functions may result in a segfault at runtime\n"));
15785 continue;
15786 }
15787
15788 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15789 }
15790 }
15791
15792 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15793 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15794 {
15795 /* Fill in the first entry in the global offset table.
15796 We use it to hold the link-time TOCbase. */
15797 bfd_put_64 (output_bfd,
15798 elf_gp (output_bfd) + TOC_BASE_OFF,
15799 htab->elf.sgot->contents);
15800
15801 /* Set .got entry size. */
15802 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15803 }
15804
15805 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15806 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15807 {
15808 /* Set .plt entry size. */
15809 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15810 = PLT_ENTRY_SIZE (htab);
15811 }
15812
15813 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15814 brlt ourselves if emitrelocations. */
15815 if (htab->brlt != NULL
15816 && htab->brlt->reloc_count != 0
15817 && !_bfd_elf_link_output_relocs (output_bfd,
15818 htab->brlt,
15819 elf_section_data (htab->brlt)->rela.hdr,
15820 elf_section_data (htab->brlt)->relocs,
15821 NULL))
15822 return FALSE;
15823
15824 if (htab->glink != NULL
15825 && htab->glink->reloc_count != 0
15826 && !_bfd_elf_link_output_relocs (output_bfd,
15827 htab->glink,
15828 elf_section_data (htab->glink)->rela.hdr,
15829 elf_section_data (htab->glink)->relocs,
15830 NULL))
15831 return FALSE;
15832
15833 if (htab->glink_eh_frame != NULL
15834 && htab->glink_eh_frame->size != 0)
15835 {
15836 bfd_vma val;
15837 bfd_byte *p;
15838 struct map_stub *group;
15839 size_t align = 4;
15840
15841 p = htab->glink_eh_frame->contents;
15842 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15843
15844 for (group = htab->group; group != NULL; group = group->next)
15845 if (group->stub_sec != NULL)
15846 {
15847 /* Offset to stub section. */
15848 val = (group->stub_sec->output_section->vma
15849 + group->stub_sec->output_offset);
15850 val -= (htab->glink_eh_frame->output_section->vma
15851 + htab->glink_eh_frame->output_offset
15852 + (p + 8 - htab->glink_eh_frame->contents));
15853 if (val + 0x80000000 > 0xffffffff)
15854 {
15855 info->callbacks->einfo
15856 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15857 group->stub_sec->name);
15858 return FALSE;
15859 }
15860 bfd_put_32 (dynobj, val, p + 8);
15861 p += stub_eh_frame_size (group, align);
15862 }
15863 if (htab->glink != NULL && htab->glink->size != 0)
15864 {
15865 /* Offset to .glink. */
15866 val = (htab->glink->output_section->vma
15867 + htab->glink->output_offset
15868 + 8);
15869 val -= (htab->glink_eh_frame->output_section->vma
15870 + htab->glink_eh_frame->output_offset
15871 + (p + 8 - htab->glink_eh_frame->contents));
15872 if (val + 0x80000000 > 0xffffffff)
15873 {
15874 info->callbacks->einfo
15875 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15876 htab->glink->name);
15877 return FALSE;
15878 }
15879 bfd_put_32 (dynobj, val, p + 8);
15880 p += (24 + align - 1) & -align;
15881 }
15882
15883 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15884 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15885 htab->glink_eh_frame,
15886 htab->glink_eh_frame->contents))
15887 return FALSE;
15888 }
15889
15890 /* We need to handle writing out multiple GOT sections ourselves,
15891 since we didn't add them to DYNOBJ. We know dynobj is the first
15892 bfd. */
15893 while ((dynobj = dynobj->link.next) != NULL)
15894 {
15895 asection *s;
15896
15897 if (!is_ppc64_elf (dynobj))
15898 continue;
15899
15900 s = ppc64_elf_tdata (dynobj)->got;
15901 if (s != NULL
15902 && s->size != 0
15903 && s->output_section != bfd_abs_section_ptr
15904 && !bfd_set_section_contents (output_bfd, s->output_section,
15905 s->contents, s->output_offset,
15906 s->size))
15907 return FALSE;
15908 s = ppc64_elf_tdata (dynobj)->relgot;
15909 if (s != NULL
15910 && s->size != 0
15911 && s->output_section != bfd_abs_section_ptr
15912 && !bfd_set_section_contents (output_bfd, s->output_section,
15913 s->contents, s->output_offset,
15914 s->size))
15915 return FALSE;
15916 }
15917
15918 return TRUE;
15919 }
15920
15921 #include "elf64-target.h"
15922
15923 /* FreeBSD support */
15924
15925 #undef TARGET_LITTLE_SYM
15926 #undef TARGET_LITTLE_NAME
15927
15928 #undef TARGET_BIG_SYM
15929 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15930 #undef TARGET_BIG_NAME
15931 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15932
15933 #undef ELF_OSABI
15934 #define ELF_OSABI ELFOSABI_FREEBSD
15935
15936 #undef elf64_bed
15937 #define elf64_bed elf64_powerpc_fbsd_bed
15938
15939 #include "elf64-target.h"
GDB Binutils - Deliverables
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