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PR 21847, Don't default PowerPC64 to --plt-localentry
[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 symcount = static_count;
3274 if (!relocatable)
3275 symcount += dyn_count;
3276 if (symcount == 0)
3277 return 0;
3278
3279 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3280 if (syms == NULL)
3281 return -1;
3282
3283 if (!relocatable && static_count != 0 && dyn_count != 0)
3284 {
3285 /* Use both symbol tables. */
3286 memcpy (syms, static_syms, static_count * sizeof (*syms));
3287 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3288 }
3289 else if (!relocatable && static_count == 0)
3290 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3291 else
3292 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3293
3294 synthetic_relocatable = relocatable;
3295 synthetic_opd = opd;
3296 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3297
3298 if (!relocatable && symcount > 1)
3299 {
3300 long j;
3301 /* Trim duplicate syms, since we may have merged the normal and
3302 dynamic symbols. Actually, we only care about syms that have
3303 different values, so trim any with the same value. */
3304 for (i = 1, j = 1; i < symcount; ++i)
3305 if (syms[i - 1]->value + syms[i - 1]->section->vma
3306 != syms[i]->value + syms[i]->section->vma)
3307 syms[j++] = syms[i];
3308 symcount = j;
3309 }
3310
3311 i = 0;
3312 /* Note that here and in compare_symbols we can't compare opd and
3313 sym->section directly. With separate debug info files, the
3314 symbols will be extracted from the debug file while abfd passed
3315 to this function is the real binary. */
3316 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3317 ++i;
3318 codesecsym = i;
3319
3320 for (; i < symcount; ++i)
3321 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3322 != (SEC_CODE | SEC_ALLOC))
3323 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3324 break;
3325 codesecsymend = i;
3326
3327 for (; i < symcount; ++i)
3328 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3329 break;
3330 secsymend = i;
3331
3332 if (opd != NULL)
3333 for (; i < symcount; ++i)
3334 if (strcmp (syms[i]->section->name, ".opd") != 0)
3335 break;
3336 opdsymend = i;
3337
3338 for (; i < symcount; ++i)
3339 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3340 != (SEC_CODE | SEC_ALLOC))
3341 break;
3342 symcount = i;
3343
3344 count = 0;
3345
3346 if (relocatable)
3347 {
3348 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3349 arelent *r;
3350 size_t size;
3351 long relcount;
3352
3353 if (opdsymend == secsymend)
3354 goto done;
3355
3356 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3357 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3358 if (relcount == 0)
3359 goto done;
3360
3361 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 size = 0;
3368 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3369 {
3370 asymbol *sym;
3371
3372 while (r < opd->relocation + relcount
3373 && r->address < syms[i]->value + opd->vma)
3374 ++r;
3375
3376 if (r == opd->relocation + relcount)
3377 break;
3378
3379 if (r->address != syms[i]->value + opd->vma)
3380 continue;
3381
3382 if (r->howto->type != R_PPC64_ADDR64)
3383 continue;
3384
3385 sym = *r->sym_ptr_ptr;
3386 if (!sym_exists_at (syms, opdsymend, symcount,
3387 sym->section->id, sym->value + r->addend))
3388 {
3389 ++count;
3390 size += sizeof (asymbol);
3391 size += strlen (syms[i]->name) + 2;
3392 }
3393 }
3394
3395 if (size == 0)
3396 goto done;
3397 s = *ret = bfd_malloc (size);
3398 if (s == NULL)
3399 {
3400 count = -1;
3401 goto done;
3402 }
3403
3404 names = (char *) (s + count);
3405
3406 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3407 {
3408 asymbol *sym;
3409
3410 while (r < opd->relocation + relcount
3411 && r->address < syms[i]->value + opd->vma)
3412 ++r;
3413
3414 if (r == opd->relocation + relcount)
3415 break;
3416
3417 if (r->address != syms[i]->value + opd->vma)
3418 continue;
3419
3420 if (r->howto->type != R_PPC64_ADDR64)
3421 continue;
3422
3423 sym = *r->sym_ptr_ptr;
3424 if (!sym_exists_at (syms, opdsymend, symcount,
3425 sym->section->id, sym->value + r->addend))
3426 {
3427 size_t len;
3428
3429 *s = *syms[i];
3430 s->flags |= BSF_SYNTHETIC;
3431 s->section = sym->section;
3432 s->value = sym->value + r->addend;
3433 s->name = names;
3434 *names++ = '.';
3435 len = strlen (syms[i]->name);
3436 memcpy (names, syms[i]->name, len + 1);
3437 names += len + 1;
3438 /* Have udata.p point back to the original symbol this
3439 synthetic symbol was derived from. */
3440 s->udata.p = syms[i];
3441 s++;
3442 }
3443 }
3444 }
3445 else
3446 {
3447 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3448 bfd_byte *contents = NULL;
3449 size_t size;
3450 long plt_count = 0;
3451 bfd_vma glink_vma = 0, resolv_vma = 0;
3452 asection *dynamic, *glink = NULL, *relplt = NULL;
3453 arelent *p;
3454
3455 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3456 {
3457 free_contents_and_exit_err:
3458 count = -1;
3459 free_contents_and_exit:
3460 if (contents)
3461 free (contents);
3462 goto done;
3463 }
3464
3465 size = 0;
3466 for (i = secsymend; i < opdsymend; ++i)
3467 {
3468 bfd_vma ent;
3469
3470 /* Ignore bogus symbols. */
3471 if (syms[i]->value > opd->size - 8)
3472 continue;
3473
3474 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3475 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3476 {
3477 ++count;
3478 size += sizeof (asymbol);
3479 size += strlen (syms[i]->name) + 2;
3480 }
3481 }
3482
3483 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3484 if (dyn_count != 0
3485 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3486 {
3487 bfd_byte *dynbuf, *extdyn, *extdynend;
3488 size_t extdynsize;
3489 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3490
3491 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3492 goto free_contents_and_exit_err;
3493
3494 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3495 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3496
3497 extdyn = dynbuf;
3498 extdynend = extdyn + dynamic->size;
3499 for (; extdyn < extdynend; extdyn += extdynsize)
3500 {
3501 Elf_Internal_Dyn dyn;
3502 (*swap_dyn_in) (abfd, extdyn, &dyn);
3503
3504 if (dyn.d_tag == DT_NULL)
3505 break;
3506
3507 if (dyn.d_tag == DT_PPC64_GLINK)
3508 {
3509 /* The first glink stub starts at offset 32; see
3510 comment in ppc64_elf_finish_dynamic_sections. */
3511 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3512 /* The .glink section usually does not survive the final
3513 link; search for the section (usually .text) where the
3514 glink stubs now reside. */
3515 glink = bfd_sections_find_if (abfd, section_covers_vma,
3516 &glink_vma);
3517 break;
3518 }
3519 }
3520
3521 free (dynbuf);
3522 }
3523
3524 if (glink != NULL)
3525 {
3526 /* Determine __glink trampoline by reading the relative branch
3527 from the first glink stub. */
3528 bfd_byte buf[4];
3529 unsigned int off = 0;
3530
3531 while (bfd_get_section_contents (abfd, glink, buf,
3532 glink_vma + off - glink->vma, 4))
3533 {
3534 unsigned int insn = bfd_get_32 (abfd, buf);
3535 insn ^= B_DOT;
3536 if ((insn & ~0x3fffffc) == 0)
3537 {
3538 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3539 break;
3540 }
3541 off += 4;
3542 if (off > 4)
3543 break;
3544 }
3545
3546 if (resolv_vma)
3547 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3548
3549 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3550 if (relplt != NULL)
3551 {
3552 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3553 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3554 goto free_contents_and_exit_err;
3555
3556 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3557 size += plt_count * sizeof (asymbol);
3558
3559 p = relplt->relocation;
3560 for (i = 0; i < plt_count; i++, p++)
3561 {
3562 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3563 if (p->addend != 0)
3564 size += sizeof ("+0x") - 1 + 16;
3565 }
3566 }
3567 }
3568
3569 if (size == 0)
3570 goto free_contents_and_exit;
3571 s = *ret = bfd_malloc (size);
3572 if (s == NULL)
3573 goto free_contents_and_exit_err;
3574
3575 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3576
3577 for (i = secsymend; i < opdsymend; ++i)
3578 {
3579 bfd_vma ent;
3580
3581 if (syms[i]->value > opd->size - 8)
3582 continue;
3583
3584 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3585 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3586 {
3587 long lo, hi;
3588 size_t len;
3589 asection *sec = abfd->sections;
3590
3591 *s = *syms[i];
3592 lo = codesecsym;
3593 hi = codesecsymend;
3594 while (lo < hi)
3595 {
3596 long mid = (lo + hi) >> 1;
3597 if (syms[mid]->section->vma < ent)
3598 lo = mid + 1;
3599 else if (syms[mid]->section->vma > ent)
3600 hi = mid;
3601 else
3602 {
3603 sec = syms[mid]->section;
3604 break;
3605 }
3606 }
3607
3608 if (lo >= hi && lo > codesecsym)
3609 sec = syms[lo - 1]->section;
3610
3611 for (; sec != NULL; sec = sec->next)
3612 {
3613 if (sec->vma > ent)
3614 break;
3615 /* SEC_LOAD may not be set if SEC is from a separate debug
3616 info file. */
3617 if ((sec->flags & SEC_ALLOC) == 0)
3618 break;
3619 if ((sec->flags & SEC_CODE) != 0)
3620 s->section = sec;
3621 }
3622 s->flags |= BSF_SYNTHETIC;
3623 s->value = ent - s->section->vma;
3624 s->name = names;
3625 *names++ = '.';
3626 len = strlen (syms[i]->name);
3627 memcpy (names, syms[i]->name, len + 1);
3628 names += len + 1;
3629 /* Have udata.p point back to the original symbol this
3630 synthetic symbol was derived from. */
3631 s->udata.p = syms[i];
3632 s++;
3633 }
3634 }
3635 free (contents);
3636
3637 if (glink != NULL && relplt != NULL)
3638 {
3639 if (resolv_vma)
3640 {
3641 /* Add a symbol for the main glink trampoline. */
3642 memset (s, 0, sizeof *s);
3643 s->the_bfd = abfd;
3644 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3645 s->section = glink;
3646 s->value = resolv_vma - glink->vma;
3647 s->name = names;
3648 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3649 names += sizeof ("__glink_PLTresolve");
3650 s++;
3651 count++;
3652 }
3653
3654 /* FIXME: It would be very much nicer to put sym@plt on the
3655 stub rather than on the glink branch table entry. The
3656 objdump disassembler would then use a sensible symbol
3657 name on plt calls. The difficulty in doing so is
3658 a) finding the stubs, and,
3659 b) matching stubs against plt entries, and,
3660 c) there can be multiple stubs for a given plt entry.
3661
3662 Solving (a) could be done by code scanning, but older
3663 ppc64 binaries used different stubs to current code.
3664 (b) is the tricky one since you need to known the toc
3665 pointer for at least one function that uses a pic stub to
3666 be able to calculate the plt address referenced.
3667 (c) means gdb would need to set multiple breakpoints (or
3668 find the glink branch itself) when setting breakpoints
3669 for pending shared library loads. */
3670 p = relplt->relocation;
3671 for (i = 0; i < plt_count; i++, p++)
3672 {
3673 size_t len;
3674
3675 *s = **p->sym_ptr_ptr;
3676 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3677 we are defining a symbol, ensure one of them is set. */
3678 if ((s->flags & BSF_LOCAL) == 0)
3679 s->flags |= BSF_GLOBAL;
3680 s->flags |= BSF_SYNTHETIC;
3681 s->section = glink;
3682 s->value = glink_vma - glink->vma;
3683 s->name = names;
3684 s->udata.p = NULL;
3685 len = strlen ((*p->sym_ptr_ptr)->name);
3686 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3687 names += len;
3688 if (p->addend != 0)
3689 {
3690 memcpy (names, "+0x", sizeof ("+0x") - 1);
3691 names += sizeof ("+0x") - 1;
3692 bfd_sprintf_vma (abfd, names, p->addend);
3693 names += strlen (names);
3694 }
3695 memcpy (names, "@plt", sizeof ("@plt"));
3696 names += sizeof ("@plt");
3697 s++;
3698 if (abi < 2)
3699 {
3700 glink_vma += 8;
3701 if (i >= 0x8000)
3702 glink_vma += 4;
3703 }
3704 else
3705 glink_vma += 4;
3706 }
3707 count += plt_count;
3708 }
3709 }
3710
3711 done:
3712 free (syms);
3713 return count;
3714 }
3715 \f
3716 /* The following functions are specific to the ELF linker, while
3717 functions above are used generally. Those named ppc64_elf_* are
3718 called by the main ELF linker code. They appear in this file more
3719 or less in the order in which they are called. eg.
3720 ppc64_elf_check_relocs is called early in the link process,
3721 ppc64_elf_finish_dynamic_sections is one of the last functions
3722 called.
3723
3724 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3725 functions have both a function code symbol and a function descriptor
3726 symbol. A call to foo in a relocatable object file looks like:
3727
3728 . .text
3729 . x:
3730 . bl .foo
3731 . nop
3732
3733 The function definition in another object file might be:
3734
3735 . .section .opd
3736 . foo: .quad .foo
3737 . .quad .TOC.@tocbase
3738 . .quad 0
3739 .
3740 . .text
3741 . .foo: blr
3742
3743 When the linker resolves the call during a static link, the branch
3744 unsurprisingly just goes to .foo and the .opd information is unused.
3745 If the function definition is in a shared library, things are a little
3746 different: The call goes via a plt call stub, the opd information gets
3747 copied to the plt, and the linker patches the nop.
3748
3749 . x:
3750 . bl .foo_stub
3751 . ld 2,40(1)
3752 .
3753 .
3754 . .foo_stub:
3755 . std 2,40(1) # in practice, the call stub
3756 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3757 . addi 11,11,Lfoo@toc@l # this is the general idea
3758 . ld 12,0(11)
3759 . ld 2,8(11)
3760 . mtctr 12
3761 . ld 11,16(11)
3762 . bctr
3763 .
3764 . .section .plt
3765 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3766
3767 The "reloc ()" notation is supposed to indicate that the linker emits
3768 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3769 copying.
3770
3771 What are the difficulties here? Well, firstly, the relocations
3772 examined by the linker in check_relocs are against the function code
3773 sym .foo, while the dynamic relocation in the plt is emitted against
3774 the function descriptor symbol, foo. Somewhere along the line, we need
3775 to carefully copy dynamic link information from one symbol to the other.
3776 Secondly, the generic part of the elf linker will make .foo a dynamic
3777 symbol as is normal for most other backends. We need foo dynamic
3778 instead, at least for an application final link. However, when
3779 creating a shared library containing foo, we need to have both symbols
3780 dynamic so that references to .foo are satisfied during the early
3781 stages of linking. Otherwise the linker might decide to pull in a
3782 definition from some other object, eg. a static library.
3783
3784 Update: As of August 2004, we support a new convention. Function
3785 calls may use the function descriptor symbol, ie. "bl foo". This
3786 behaves exactly as "bl .foo". */
3787
3788 /* Of those relocs that might be copied as dynamic relocs, this function
3789 selects those that must be copied when linking a shared library,
3790 even when the symbol is local. */
3791
3792 static int
3793 must_be_dyn_reloc (struct bfd_link_info *info,
3794 enum elf_ppc64_reloc_type r_type)
3795 {
3796 switch (r_type)
3797 {
3798 default:
3799 return 1;
3800
3801 case R_PPC64_REL32:
3802 case R_PPC64_REL64:
3803 case R_PPC64_REL30:
3804 return 0;
3805
3806 case R_PPC64_TPREL16:
3807 case R_PPC64_TPREL16_LO:
3808 case R_PPC64_TPREL16_HI:
3809 case R_PPC64_TPREL16_HA:
3810 case R_PPC64_TPREL16_DS:
3811 case R_PPC64_TPREL16_LO_DS:
3812 case R_PPC64_TPREL16_HIGH:
3813 case R_PPC64_TPREL16_HIGHA:
3814 case R_PPC64_TPREL16_HIGHER:
3815 case R_PPC64_TPREL16_HIGHERA:
3816 case R_PPC64_TPREL16_HIGHEST:
3817 case R_PPC64_TPREL16_HIGHESTA:
3818 case R_PPC64_TPREL64:
3819 return !bfd_link_executable (info);
3820 }
3821 }
3822
3823 /* Whether an undefined weak symbol should resolve to its link-time
3824 value, even in PIC or PIE objects. */
3825 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3826 ((H)->root.type == bfd_link_hash_undefweak \
3827 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3828 || (INFO)->dynamic_undefined_weak == 0))
3829
3830 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3831 copying dynamic variables from a shared lib into an app's dynbss
3832 section, and instead use a dynamic relocation to point into the
3833 shared lib. With code that gcc generates, it's vital that this be
3834 enabled; In the PowerPC64 ABI, the address of a function is actually
3835 the address of a function descriptor, which resides in the .opd
3836 section. gcc uses the descriptor directly rather than going via the
3837 GOT as some other ABI's do, which means that initialized function
3838 pointers must reference the descriptor. Thus, a function pointer
3839 initialized to the address of a function in a shared library will
3840 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3841 redefines the function descriptor symbol to point to the copy. This
3842 presents a problem as a plt entry for that function is also
3843 initialized from the function descriptor symbol and the copy reloc
3844 may not be initialized first. */
3845 #define ELIMINATE_COPY_RELOCS 1
3846
3847 /* Section name for stubs is the associated section name plus this
3848 string. */
3849 #define STUB_SUFFIX ".stub"
3850
3851 /* Linker stubs.
3852 ppc_stub_long_branch:
3853 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3854 destination, but a 24 bit branch in a stub section will reach.
3855 . b dest
3856
3857 ppc_stub_plt_branch:
3858 Similar to the above, but a 24 bit branch in the stub section won't
3859 reach its destination.
3860 . addis %r11,%r2,xxx@toc@ha
3861 . ld %r12,xxx@toc@l(%r11)
3862 . mtctr %r12
3863 . bctr
3864
3865 ppc_stub_plt_call:
3866 Used to call a function in a shared library. If it so happens that
3867 the plt entry referenced crosses a 64k boundary, then an extra
3868 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3869 . std %r2,40(%r1)
3870 . addis %r11,%r2,xxx@toc@ha
3871 . ld %r12,xxx+0@toc@l(%r11)
3872 . mtctr %r12
3873 . ld %r2,xxx+8@toc@l(%r11)
3874 . ld %r11,xxx+16@toc@l(%r11)
3875 . bctr
3876
3877 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3878 code to adjust the value and save r2 to support multiple toc sections.
3879 A ppc_stub_long_branch with an r2 offset looks like:
3880 . std %r2,40(%r1)
3881 . addis %r2,%r2,off@ha
3882 . addi %r2,%r2,off@l
3883 . b dest
3884
3885 A ppc_stub_plt_branch with an r2 offset looks like:
3886 . std %r2,40(%r1)
3887 . addis %r11,%r2,xxx@toc@ha
3888 . ld %r12,xxx@toc@l(%r11)
3889 . addis %r2,%r2,off@ha
3890 . addi %r2,%r2,off@l
3891 . mtctr %r12
3892 . bctr
3893
3894 In cases where the "addis" instruction would add zero, the "addis" is
3895 omitted and following instructions modified slightly in some cases.
3896 */
3897
3898 enum ppc_stub_type {
3899 ppc_stub_none,
3900 ppc_stub_long_branch,
3901 ppc_stub_long_branch_r2off,
3902 ppc_stub_plt_branch,
3903 ppc_stub_plt_branch_r2off,
3904 ppc_stub_plt_call,
3905 ppc_stub_plt_call_r2save,
3906 ppc_stub_global_entry,
3907 ppc_stub_save_res
3908 };
3909
3910 /* Information on stub grouping. */
3911 struct map_stub
3912 {
3913 /* The stub section. */
3914 asection *stub_sec;
3915 /* This is the section to which stubs in the group will be attached. */
3916 asection *link_sec;
3917 /* Next group. */
3918 struct map_stub *next;
3919 /* Whether to emit a copy of register save/restore functions in this
3920 group. */
3921 int needs_save_res;
3922 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3923 or -1u if no such stub with bctrl exists. */
3924 unsigned int tls_get_addr_opt_bctrl;
3925 };
3926
3927 struct ppc_stub_hash_entry {
3928
3929 /* Base hash table entry structure. */
3930 struct bfd_hash_entry root;
3931
3932 enum ppc_stub_type stub_type;
3933
3934 /* Group information. */
3935 struct map_stub *group;
3936
3937 /* Offset within stub_sec of the beginning of this stub. */
3938 bfd_vma stub_offset;
3939
3940 /* Given the symbol's value and its section we can determine its final
3941 value when building the stubs (so the stub knows where to jump. */
3942 bfd_vma target_value;
3943 asection *target_section;
3944
3945 /* The symbol table entry, if any, that this was derived from. */
3946 struct ppc_link_hash_entry *h;
3947 struct plt_entry *plt_ent;
3948
3949 /* Symbol st_other. */
3950 unsigned char other;
3951 };
3952
3953 struct ppc_branch_hash_entry {
3954
3955 /* Base hash table entry structure. */
3956 struct bfd_hash_entry root;
3957
3958 /* Offset within branch lookup table. */
3959 unsigned int offset;
3960
3961 /* Generation marker. */
3962 unsigned int iter;
3963 };
3964
3965 /* Used to track dynamic relocations for local symbols. */
3966 struct ppc_dyn_relocs
3967 {
3968 struct ppc_dyn_relocs *next;
3969
3970 /* The input section of the reloc. */
3971 asection *sec;
3972
3973 /* Total number of relocs copied for the input section. */
3974 unsigned int count : 31;
3975
3976 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3977 unsigned int ifunc : 1;
3978 };
3979
3980 struct ppc_link_hash_entry
3981 {
3982 struct elf_link_hash_entry elf;
3983
3984 union {
3985 /* A pointer to the most recently used stub hash entry against this
3986 symbol. */
3987 struct ppc_stub_hash_entry *stub_cache;
3988
3989 /* A pointer to the next symbol starting with a '.' */
3990 struct ppc_link_hash_entry *next_dot_sym;
3991 } u;
3992
3993 /* Track dynamic relocs copied for this symbol. */
3994 struct elf_dyn_relocs *dyn_relocs;
3995
3996 /* Chain of aliases referring to a weakdef. */
3997 struct ppc_link_hash_entry *weakref;
3998
3999 /* Link between function code and descriptor symbols. */
4000 struct ppc_link_hash_entry *oh;
4001
4002 /* Flag function code and descriptor symbols. */
4003 unsigned int is_func:1;
4004 unsigned int is_func_descriptor:1;
4005 unsigned int fake:1;
4006
4007 /* Whether global opd/toc sym has been adjusted or not.
4008 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4009 should be set for all globals defined in any opd/toc section. */
4010 unsigned int adjust_done:1;
4011
4012 /* Set if this is an out-of-line register save/restore function,
4013 with non-standard calling convention. */
4014 unsigned int save_res:1;
4015
4016 /* Set if a duplicate symbol with non-zero localentry is detected,
4017 even when the duplicate symbol does not provide a definition. */
4018 unsigned int non_zero_localentry:1;
4019
4020 /* Contexts in which symbol is used in the GOT (or TOC).
4021 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4022 corresponding relocs are encountered during check_relocs.
4023 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4024 indicate the corresponding GOT entry type is not needed.
4025 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4026 a TPREL one. We use a separate flag rather than setting TPREL
4027 just for convenience in distinguishing the two cases. */
4028 #define TLS_GD 1 /* GD reloc. */
4029 #define TLS_LD 2 /* LD reloc. */
4030 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4031 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4032 #define TLS_TLS 16 /* Any TLS reloc. */
4033 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4034 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4035 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4036 unsigned char tls_mask;
4037 };
4038
4039 /* ppc64 ELF linker hash table. */
4040
4041 struct ppc_link_hash_table
4042 {
4043 struct elf_link_hash_table elf;
4044
4045 /* The stub hash table. */
4046 struct bfd_hash_table stub_hash_table;
4047
4048 /* Another hash table for plt_branch stubs. */
4049 struct bfd_hash_table branch_hash_table;
4050
4051 /* Hash table for function prologue tocsave. */
4052 htab_t tocsave_htab;
4053
4054 /* Various options and other info passed from the linker. */
4055 struct ppc64_elf_params *params;
4056
4057 /* The size of sec_info below. */
4058 unsigned int sec_info_arr_size;
4059
4060 /* Per-section array of extra section info. Done this way rather
4061 than as part of ppc64_elf_section_data so we have the info for
4062 non-ppc64 sections. */
4063 struct
4064 {
4065 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4066 bfd_vma toc_off;
4067
4068 union
4069 {
4070 /* The section group that this section belongs to. */
4071 struct map_stub *group;
4072 /* A temp section list pointer. */
4073 asection *list;
4074 } u;
4075 } *sec_info;
4076
4077 /* Linked list of groups. */
4078 struct map_stub *group;
4079
4080 /* Temp used when calculating TOC pointers. */
4081 bfd_vma toc_curr;
4082 bfd *toc_bfd;
4083 asection *toc_first_sec;
4084
4085 /* Used when adding symbols. */
4086 struct ppc_link_hash_entry *dot_syms;
4087
4088 /* Shortcuts to get to dynamic linker sections. */
4089 asection *glink;
4090 asection *sfpr;
4091 asection *brlt;
4092 asection *relbrlt;
4093 asection *glink_eh_frame;
4094
4095 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4096 struct ppc_link_hash_entry *tls_get_addr;
4097 struct ppc_link_hash_entry *tls_get_addr_fd;
4098
4099 /* The size of reliplt used by got entry relocs. */
4100 bfd_size_type got_reli_size;
4101
4102 /* Statistics. */
4103 unsigned long stub_count[ppc_stub_global_entry];
4104
4105 /* Number of stubs against global syms. */
4106 unsigned long stub_globals;
4107
4108 /* Set if we're linking code with function descriptors. */
4109 unsigned int opd_abi:1;
4110
4111 /* Support for multiple toc sections. */
4112 unsigned int do_multi_toc:1;
4113 unsigned int multi_toc_needed:1;
4114 unsigned int second_toc_pass:1;
4115 unsigned int do_toc_opt:1;
4116
4117 /* Set on error. */
4118 unsigned int stub_error:1;
4119
4120 /* Whether func_desc_adjust needs to be run over symbols. */
4121 unsigned int need_func_desc_adj:1;
4122
4123 /* Whether there exist local gnu indirect function resolvers,
4124 referenced by dynamic relocations. */
4125 unsigned int local_ifunc_resolver:1;
4126 unsigned int maybe_local_ifunc_resolver:1;
4127
4128 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4129 unsigned int has_plt_localentry0:1;
4130
4131 /* Incremented every time we size stubs. */
4132 unsigned int stub_iteration;
4133
4134 /* Small local sym cache. */
4135 struct sym_cache sym_cache;
4136 };
4137
4138 /* Rename some of the generic section flags to better document how they
4139 are used here. */
4140
4141 /* Nonzero if this section has TLS related relocations. */
4142 #define has_tls_reloc sec_flg0
4143
4144 /* Nonzero if this section has a call to __tls_get_addr. */
4145 #define has_tls_get_addr_call sec_flg1
4146
4147 /* Nonzero if this section has any toc or got relocs. */
4148 #define has_toc_reloc sec_flg2
4149
4150 /* Nonzero if this section has a call to another section that uses
4151 the toc or got. */
4152 #define makes_toc_func_call sec_flg3
4153
4154 /* Recursion protection when determining above flag. */
4155 #define call_check_in_progress sec_flg4
4156 #define call_check_done sec_flg5
4157
4158 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4159
4160 #define ppc_hash_table(p) \
4161 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4162 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4163
4164 #define ppc_stub_hash_lookup(table, string, create, copy) \
4165 ((struct ppc_stub_hash_entry *) \
4166 bfd_hash_lookup ((table), (string), (create), (copy)))
4167
4168 #define ppc_branch_hash_lookup(table, string, create, copy) \
4169 ((struct ppc_branch_hash_entry *) \
4170 bfd_hash_lookup ((table), (string), (create), (copy)))
4171
4172 /* Create an entry in the stub hash table. */
4173
4174 static struct bfd_hash_entry *
4175 stub_hash_newfunc (struct bfd_hash_entry *entry,
4176 struct bfd_hash_table *table,
4177 const char *string)
4178 {
4179 /* Allocate the structure if it has not already been allocated by a
4180 subclass. */
4181 if (entry == NULL)
4182 {
4183 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4184 if (entry == NULL)
4185 return entry;
4186 }
4187
4188 /* Call the allocation method of the superclass. */
4189 entry = bfd_hash_newfunc (entry, table, string);
4190 if (entry != NULL)
4191 {
4192 struct ppc_stub_hash_entry *eh;
4193
4194 /* Initialize the local fields. */
4195 eh = (struct ppc_stub_hash_entry *) entry;
4196 eh->stub_type = ppc_stub_none;
4197 eh->group = NULL;
4198 eh->stub_offset = 0;
4199 eh->target_value = 0;
4200 eh->target_section = NULL;
4201 eh->h = NULL;
4202 eh->plt_ent = NULL;
4203 eh->other = 0;
4204 }
4205
4206 return entry;
4207 }
4208
4209 /* Create an entry in the branch hash table. */
4210
4211 static struct bfd_hash_entry *
4212 branch_hash_newfunc (struct bfd_hash_entry *entry,
4213 struct bfd_hash_table *table,
4214 const char *string)
4215 {
4216 /* Allocate the structure if it has not already been allocated by a
4217 subclass. */
4218 if (entry == NULL)
4219 {
4220 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4221 if (entry == NULL)
4222 return entry;
4223 }
4224
4225 /* Call the allocation method of the superclass. */
4226 entry = bfd_hash_newfunc (entry, table, string);
4227 if (entry != NULL)
4228 {
4229 struct ppc_branch_hash_entry *eh;
4230
4231 /* Initialize the local fields. */
4232 eh = (struct ppc_branch_hash_entry *) entry;
4233 eh->offset = 0;
4234 eh->iter = 0;
4235 }
4236
4237 return entry;
4238 }
4239
4240 /* Create an entry in a ppc64 ELF linker hash table. */
4241
4242 static struct bfd_hash_entry *
4243 link_hash_newfunc (struct bfd_hash_entry *entry,
4244 struct bfd_hash_table *table,
4245 const char *string)
4246 {
4247 /* Allocate the structure if it has not already been allocated by a
4248 subclass. */
4249 if (entry == NULL)
4250 {
4251 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4252 if (entry == NULL)
4253 return entry;
4254 }
4255
4256 /* Call the allocation method of the superclass. */
4257 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4258 if (entry != NULL)
4259 {
4260 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4261
4262 memset (&eh->u.stub_cache, 0,
4263 (sizeof (struct ppc_link_hash_entry)
4264 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4265
4266 /* When making function calls, old ABI code references function entry
4267 points (dot symbols), while new ABI code references the function
4268 descriptor symbol. We need to make any combination of reference and
4269 definition work together, without breaking archive linking.
4270
4271 For a defined function "foo" and an undefined call to "bar":
4272 An old object defines "foo" and ".foo", references ".bar" (possibly
4273 "bar" too).
4274 A new object defines "foo" and references "bar".
4275
4276 A new object thus has no problem with its undefined symbols being
4277 satisfied by definitions in an old object. On the other hand, the
4278 old object won't have ".bar" satisfied by a new object.
4279
4280 Keep a list of newly added dot-symbols. */
4281
4282 if (string[0] == '.')
4283 {
4284 struct ppc_link_hash_table *htab;
4285
4286 htab = (struct ppc_link_hash_table *) table;
4287 eh->u.next_dot_sym = htab->dot_syms;
4288 htab->dot_syms = eh;
4289 }
4290 }
4291
4292 return entry;
4293 }
4294
4295 struct tocsave_entry {
4296 asection *sec;
4297 bfd_vma offset;
4298 };
4299
4300 static hashval_t
4301 tocsave_htab_hash (const void *p)
4302 {
4303 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4304 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4305 }
4306
4307 static int
4308 tocsave_htab_eq (const void *p1, const void *p2)
4309 {
4310 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4311 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4312 return e1->sec == e2->sec && e1->offset == e2->offset;
4313 }
4314
4315 /* Destroy a ppc64 ELF linker hash table. */
4316
4317 static void
4318 ppc64_elf_link_hash_table_free (bfd *obfd)
4319 {
4320 struct ppc_link_hash_table *htab;
4321
4322 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4323 if (htab->tocsave_htab)
4324 htab_delete (htab->tocsave_htab);
4325 bfd_hash_table_free (&htab->branch_hash_table);
4326 bfd_hash_table_free (&htab->stub_hash_table);
4327 _bfd_elf_link_hash_table_free (obfd);
4328 }
4329
4330 /* Create a ppc64 ELF linker hash table. */
4331
4332 static struct bfd_link_hash_table *
4333 ppc64_elf_link_hash_table_create (bfd *abfd)
4334 {
4335 struct ppc_link_hash_table *htab;
4336 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4337
4338 htab = bfd_zmalloc (amt);
4339 if (htab == NULL)
4340 return NULL;
4341
4342 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4343 sizeof (struct ppc_link_hash_entry),
4344 PPC64_ELF_DATA))
4345 {
4346 free (htab);
4347 return NULL;
4348 }
4349
4350 /* Init the stub hash table too. */
4351 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4352 sizeof (struct ppc_stub_hash_entry)))
4353 {
4354 _bfd_elf_link_hash_table_free (abfd);
4355 return NULL;
4356 }
4357
4358 /* And the branch hash table. */
4359 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4360 sizeof (struct ppc_branch_hash_entry)))
4361 {
4362 bfd_hash_table_free (&htab->stub_hash_table);
4363 _bfd_elf_link_hash_table_free (abfd);
4364 return NULL;
4365 }
4366
4367 htab->tocsave_htab = htab_try_create (1024,
4368 tocsave_htab_hash,
4369 tocsave_htab_eq,
4370 NULL);
4371 if (htab->tocsave_htab == NULL)
4372 {
4373 ppc64_elf_link_hash_table_free (abfd);
4374 return NULL;
4375 }
4376 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4377
4378 /* Initializing two fields of the union is just cosmetic. We really
4379 only care about glist, but when compiled on a 32-bit host the
4380 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4381 debugger inspection of these fields look nicer. */
4382 htab->elf.init_got_refcount.refcount = 0;
4383 htab->elf.init_got_refcount.glist = NULL;
4384 htab->elf.init_plt_refcount.refcount = 0;
4385 htab->elf.init_plt_refcount.glist = NULL;
4386 htab->elf.init_got_offset.offset = 0;
4387 htab->elf.init_got_offset.glist = NULL;
4388 htab->elf.init_plt_offset.offset = 0;
4389 htab->elf.init_plt_offset.glist = NULL;
4390
4391 return &htab->elf.root;
4392 }
4393
4394 /* Create sections for linker generated code. */
4395
4396 static bfd_boolean
4397 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4398 {
4399 struct ppc_link_hash_table *htab;
4400 flagword flags;
4401
4402 htab = ppc_hash_table (info);
4403
4404 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4405 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4406 if (htab->params->save_restore_funcs)
4407 {
4408 /* Create .sfpr for code to save and restore fp regs. */
4409 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4410 flags);
4411 if (htab->sfpr == NULL
4412 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4413 return FALSE;
4414 }
4415
4416 if (bfd_link_relocatable (info))
4417 return TRUE;
4418
4419 /* Create .glink for lazy dynamic linking support. */
4420 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4421 flags);
4422 if (htab->glink == NULL
4423 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4424 return FALSE;
4425
4426 if (!info->no_ld_generated_unwind_info)
4427 {
4428 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4429 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4430 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4431 ".eh_frame",
4432 flags);
4433 if (htab->glink_eh_frame == NULL
4434 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4435 return FALSE;
4436 }
4437
4438 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4439 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4440 if (htab->elf.iplt == NULL
4441 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4442 return FALSE;
4443
4444 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4445 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4446 htab->elf.irelplt
4447 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4448 if (htab->elf.irelplt == NULL
4449 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4450 return FALSE;
4451
4452 /* Create branch lookup table for plt_branch stubs. */
4453 flags = (SEC_ALLOC | SEC_LOAD
4454 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4455 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4456 flags);
4457 if (htab->brlt == NULL
4458 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4459 return FALSE;
4460
4461 if (!bfd_link_pic (info))
4462 return TRUE;
4463
4464 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4465 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4466 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4467 ".rela.branch_lt",
4468 flags);
4469 if (htab->relbrlt == NULL
4470 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4471 return FALSE;
4472
4473 return TRUE;
4474 }
4475
4476 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4477
4478 bfd_boolean
4479 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4480 struct ppc64_elf_params *params)
4481 {
4482 struct ppc_link_hash_table *htab;
4483
4484 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4485
4486 /* Always hook our dynamic sections into the first bfd, which is the
4487 linker created stub bfd. This ensures that the GOT header is at
4488 the start of the output TOC section. */
4489 htab = ppc_hash_table (info);
4490 htab->elf.dynobj = params->stub_bfd;
4491 htab->params = params;
4492
4493 return create_linkage_sections (htab->elf.dynobj, info);
4494 }
4495
4496 /* Build a name for an entry in the stub hash table. */
4497
4498 static char *
4499 ppc_stub_name (const asection *input_section,
4500 const asection *sym_sec,
4501 const struct ppc_link_hash_entry *h,
4502 const Elf_Internal_Rela *rel)
4503 {
4504 char *stub_name;
4505 ssize_t len;
4506
4507 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4508 offsets from a sym as a branch target? In fact, we could
4509 probably assume the addend is always zero. */
4510 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4511
4512 if (h)
4513 {
4514 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4515 stub_name = bfd_malloc (len);
4516 if (stub_name == NULL)
4517 return stub_name;
4518
4519 len = sprintf (stub_name, "%08x.%s+%x",
4520 input_section->id & 0xffffffff,
4521 h->elf.root.root.string,
4522 (int) rel->r_addend & 0xffffffff);
4523 }
4524 else
4525 {
4526 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4527 stub_name = bfd_malloc (len);
4528 if (stub_name == NULL)
4529 return stub_name;
4530
4531 len = sprintf (stub_name, "%08x.%x:%x+%x",
4532 input_section->id & 0xffffffff,
4533 sym_sec->id & 0xffffffff,
4534 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4535 (int) rel->r_addend & 0xffffffff);
4536 }
4537 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4538 stub_name[len - 2] = 0;
4539 return stub_name;
4540 }
4541
4542 /* Look up an entry in the stub hash. Stub entries are cached because
4543 creating the stub name takes a bit of time. */
4544
4545 static struct ppc_stub_hash_entry *
4546 ppc_get_stub_entry (const asection *input_section,
4547 const asection *sym_sec,
4548 struct ppc_link_hash_entry *h,
4549 const Elf_Internal_Rela *rel,
4550 struct ppc_link_hash_table *htab)
4551 {
4552 struct ppc_stub_hash_entry *stub_entry;
4553 struct map_stub *group;
4554
4555 /* If this input section is part of a group of sections sharing one
4556 stub section, then use the id of the first section in the group.
4557 Stub names need to include a section id, as there may well be
4558 more than one stub used to reach say, printf, and we need to
4559 distinguish between them. */
4560 group = htab->sec_info[input_section->id].u.group;
4561 if (group == NULL)
4562 return NULL;
4563
4564 if (h != NULL && h->u.stub_cache != NULL
4565 && h->u.stub_cache->h == h
4566 && h->u.stub_cache->group == group)
4567 {
4568 stub_entry = h->u.stub_cache;
4569 }
4570 else
4571 {
4572 char *stub_name;
4573
4574 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4575 if (stub_name == NULL)
4576 return NULL;
4577
4578 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4579 stub_name, FALSE, FALSE);
4580 if (h != NULL)
4581 h->u.stub_cache = stub_entry;
4582
4583 free (stub_name);
4584 }
4585
4586 return stub_entry;
4587 }
4588
4589 /* Add a new stub entry to the stub hash. Not all fields of the new
4590 stub entry are initialised. */
4591
4592 static struct ppc_stub_hash_entry *
4593 ppc_add_stub (const char *stub_name,
4594 asection *section,
4595 struct bfd_link_info *info)
4596 {
4597 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4598 struct map_stub *group;
4599 asection *link_sec;
4600 asection *stub_sec;
4601 struct ppc_stub_hash_entry *stub_entry;
4602
4603 group = htab->sec_info[section->id].u.group;
4604 link_sec = group->link_sec;
4605 stub_sec = group->stub_sec;
4606 if (stub_sec == NULL)
4607 {
4608 size_t namelen;
4609 bfd_size_type len;
4610 char *s_name;
4611
4612 namelen = strlen (link_sec->name);
4613 len = namelen + sizeof (STUB_SUFFIX);
4614 s_name = bfd_alloc (htab->params->stub_bfd, len);
4615 if (s_name == NULL)
4616 return NULL;
4617
4618 memcpy (s_name, link_sec->name, namelen);
4619 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4620 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4621 if (stub_sec == NULL)
4622 return NULL;
4623 group->stub_sec = stub_sec;
4624 }
4625
4626 /* Enter this entry into the linker stub hash table. */
4627 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4628 TRUE, FALSE);
4629 if (stub_entry == NULL)
4630 {
4631 /* xgettext:c-format */
4632 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4633 section->owner, stub_name);
4634 return NULL;
4635 }
4636
4637 stub_entry->group = group;
4638 stub_entry->stub_offset = 0;
4639 return stub_entry;
4640 }
4641
4642 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4643 not already done. */
4644
4645 static bfd_boolean
4646 create_got_section (bfd *abfd, struct bfd_link_info *info)
4647 {
4648 asection *got, *relgot;
4649 flagword flags;
4650 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4651
4652 if (!is_ppc64_elf (abfd))
4653 return FALSE;
4654 if (htab == NULL)
4655 return FALSE;
4656
4657 if (!htab->elf.sgot
4658 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4659 return FALSE;
4660
4661 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4662 | SEC_LINKER_CREATED);
4663
4664 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4665 if (!got
4666 || !bfd_set_section_alignment (abfd, got, 3))
4667 return FALSE;
4668
4669 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4670 flags | SEC_READONLY);
4671 if (!relgot
4672 || ! bfd_set_section_alignment (abfd, relgot, 3))
4673 return FALSE;
4674
4675 ppc64_elf_tdata (abfd)->got = got;
4676 ppc64_elf_tdata (abfd)->relgot = relgot;
4677 return TRUE;
4678 }
4679
4680 /* Follow indirect and warning symbol links. */
4681
4682 static inline struct bfd_link_hash_entry *
4683 follow_link (struct bfd_link_hash_entry *h)
4684 {
4685 while (h->type == bfd_link_hash_indirect
4686 || h->type == bfd_link_hash_warning)
4687 h = h->u.i.link;
4688 return h;
4689 }
4690
4691 static inline struct elf_link_hash_entry *
4692 elf_follow_link (struct elf_link_hash_entry *h)
4693 {
4694 return (struct elf_link_hash_entry *) follow_link (&h->root);
4695 }
4696
4697 static inline struct ppc_link_hash_entry *
4698 ppc_follow_link (struct ppc_link_hash_entry *h)
4699 {
4700 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4701 }
4702
4703 /* Merge PLT info on FROM with that on TO. */
4704
4705 static void
4706 move_plt_plist (struct ppc_link_hash_entry *from,
4707 struct ppc_link_hash_entry *to)
4708 {
4709 if (from->elf.plt.plist != NULL)
4710 {
4711 if (to->elf.plt.plist != NULL)
4712 {
4713 struct plt_entry **entp;
4714 struct plt_entry *ent;
4715
4716 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4717 {
4718 struct plt_entry *dent;
4719
4720 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4721 if (dent->addend == ent->addend)
4722 {
4723 dent->plt.refcount += ent->plt.refcount;
4724 *entp = ent->next;
4725 break;
4726 }
4727 if (dent == NULL)
4728 entp = &ent->next;
4729 }
4730 *entp = to->elf.plt.plist;
4731 }
4732
4733 to->elf.plt.plist = from->elf.plt.plist;
4734 from->elf.plt.plist = NULL;
4735 }
4736 }
4737
4738 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4739
4740 static void
4741 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4742 struct elf_link_hash_entry *dir,
4743 struct elf_link_hash_entry *ind)
4744 {
4745 struct ppc_link_hash_entry *edir, *eind;
4746
4747 edir = (struct ppc_link_hash_entry *) dir;
4748 eind = (struct ppc_link_hash_entry *) ind;
4749
4750 edir->is_func |= eind->is_func;
4751 edir->is_func_descriptor |= eind->is_func_descriptor;
4752 edir->tls_mask |= eind->tls_mask;
4753 if (eind->oh != NULL)
4754 edir->oh = ppc_follow_link (eind->oh);
4755
4756 /* If called to transfer flags for a weakdef during processing
4757 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4758 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4759 if (!(ELIMINATE_COPY_RELOCS
4760 && eind->elf.root.type != bfd_link_hash_indirect
4761 && edir->elf.dynamic_adjusted))
4762 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4763
4764 if (edir->elf.versioned != versioned_hidden)
4765 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4766 edir->elf.ref_regular |= eind->elf.ref_regular;
4767 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4768 edir->elf.needs_plt |= eind->elf.needs_plt;
4769 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4770
4771 /* If we were called to copy over info for a weak sym, don't copy
4772 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4773 in order to simplify readonly_dynrelocs and save a field in the
4774 symbol hash entry, but that means dyn_relocs can't be used in any
4775 tests about a specific symbol, or affect other symbol flags which
4776 are then tested.
4777 Chain weakdefs so we can get from the weakdef back to an alias.
4778 The list is circular so that we don't need to use u.weakdef as
4779 well as this list to look at all aliases. */
4780 if (eind->elf.root.type != bfd_link_hash_indirect)
4781 {
4782 struct ppc_link_hash_entry *cur, *add, *next;
4783
4784 add = eind;
4785 do
4786 {
4787 cur = edir->weakref;
4788 if (cur != NULL)
4789 {
4790 do
4791 {
4792 /* We can be called twice for the same symbols.
4793 Don't make multiple loops. */
4794 if (cur == add)
4795 return;
4796 cur = cur->weakref;
4797 } while (cur != edir);
4798 }
4799 next = add->weakref;
4800 if (cur != add)
4801 {
4802 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4803 edir->weakref = add;
4804 }
4805 add = next;
4806 } while (add != NULL && add != eind);
4807 return;
4808 }
4809
4810 /* Copy over any dynamic relocs we may have on the indirect sym. */
4811 if (eind->dyn_relocs != NULL)
4812 {
4813 if (edir->dyn_relocs != NULL)
4814 {
4815 struct elf_dyn_relocs **pp;
4816 struct elf_dyn_relocs *p;
4817
4818 /* Add reloc counts against the indirect sym to the direct sym
4819 list. Merge any entries against the same section. */
4820 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4821 {
4822 struct elf_dyn_relocs *q;
4823
4824 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4825 if (q->sec == p->sec)
4826 {
4827 q->pc_count += p->pc_count;
4828 q->count += p->count;
4829 *pp = p->next;
4830 break;
4831 }
4832 if (q == NULL)
4833 pp = &p->next;
4834 }
4835 *pp = edir->dyn_relocs;
4836 }
4837
4838 edir->dyn_relocs = eind->dyn_relocs;
4839 eind->dyn_relocs = NULL;
4840 }
4841
4842 /* Copy over got entries that we may have already seen to the
4843 symbol which just became indirect. */
4844 if (eind->elf.got.glist != NULL)
4845 {
4846 if (edir->elf.got.glist != NULL)
4847 {
4848 struct got_entry **entp;
4849 struct got_entry *ent;
4850
4851 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4852 {
4853 struct got_entry *dent;
4854
4855 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4856 if (dent->addend == ent->addend
4857 && dent->owner == ent->owner
4858 && dent->tls_type == ent->tls_type)
4859 {
4860 dent->got.refcount += ent->got.refcount;
4861 *entp = ent->next;
4862 break;
4863 }
4864 if (dent == NULL)
4865 entp = &ent->next;
4866 }
4867 *entp = edir->elf.got.glist;
4868 }
4869
4870 edir->elf.got.glist = eind->elf.got.glist;
4871 eind->elf.got.glist = NULL;
4872 }
4873
4874 /* And plt entries. */
4875 move_plt_plist (eind, edir);
4876
4877 if (eind->elf.dynindx != -1)
4878 {
4879 if (edir->elf.dynindx != -1)
4880 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4881 edir->elf.dynstr_index);
4882 edir->elf.dynindx = eind->elf.dynindx;
4883 edir->elf.dynstr_index = eind->elf.dynstr_index;
4884 eind->elf.dynindx = -1;
4885 eind->elf.dynstr_index = 0;
4886 }
4887 }
4888
4889 /* Find the function descriptor hash entry from the given function code
4890 hash entry FH. Link the entries via their OH fields. */
4891
4892 static struct ppc_link_hash_entry *
4893 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4894 {
4895 struct ppc_link_hash_entry *fdh = fh->oh;
4896
4897 if (fdh == NULL)
4898 {
4899 const char *fd_name = fh->elf.root.root.string + 1;
4900
4901 fdh = (struct ppc_link_hash_entry *)
4902 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4903 if (fdh == NULL)
4904 return fdh;
4905
4906 fdh->is_func_descriptor = 1;
4907 fdh->oh = fh;
4908 fh->is_func = 1;
4909 fh->oh = fdh;
4910 }
4911
4912 fdh = ppc_follow_link (fdh);
4913 fdh->is_func_descriptor = 1;
4914 fdh->oh = fh;
4915 return fdh;
4916 }
4917
4918 /* Make a fake function descriptor sym for the undefined code sym FH. */
4919
4920 static struct ppc_link_hash_entry *
4921 make_fdh (struct bfd_link_info *info,
4922 struct ppc_link_hash_entry *fh)
4923 {
4924 bfd *abfd = fh->elf.root.u.undef.abfd;
4925 struct bfd_link_hash_entry *bh = NULL;
4926 struct ppc_link_hash_entry *fdh;
4927 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4928 ? BSF_WEAK
4929 : BSF_GLOBAL);
4930
4931 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4932 fh->elf.root.root.string + 1,
4933 flags, bfd_und_section_ptr, 0,
4934 NULL, FALSE, FALSE, &bh))
4935 return NULL;
4936
4937 fdh = (struct ppc_link_hash_entry *) bh;
4938 fdh->elf.non_elf = 0;
4939 fdh->fake = 1;
4940 fdh->is_func_descriptor = 1;
4941 fdh->oh = fh;
4942 fh->is_func = 1;
4943 fh->oh = fdh;
4944 return fdh;
4945 }
4946
4947 /* Fix function descriptor symbols defined in .opd sections to be
4948 function type. */
4949
4950 static bfd_boolean
4951 ppc64_elf_add_symbol_hook (bfd *ibfd,
4952 struct bfd_link_info *info,
4953 Elf_Internal_Sym *isym,
4954 const char **name,
4955 flagword *flags ATTRIBUTE_UNUSED,
4956 asection **sec,
4957 bfd_vma *value)
4958 {
4959 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4960 && (ibfd->flags & DYNAMIC) == 0
4961 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4962 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4963
4964 if (*sec != NULL
4965 && strcmp ((*sec)->name, ".opd") == 0)
4966 {
4967 asection *code_sec;
4968
4969 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4970 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4971 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4972
4973 /* If the symbol is a function defined in .opd, and the function
4974 code is in a discarded group, let it appear to be undefined. */
4975 if (!bfd_link_relocatable (info)
4976 && (*sec)->reloc_count != 0
4977 && opd_entry_value (*sec, *value, &code_sec, NULL,
4978 FALSE) != (bfd_vma) -1
4979 && discarded_section (code_sec))
4980 {
4981 *sec = bfd_und_section_ptr;
4982 isym->st_shndx = SHN_UNDEF;
4983 }
4984 }
4985 else if (*sec != NULL
4986 && strcmp ((*sec)->name, ".toc") == 0
4987 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4988 {
4989 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4990 if (htab != NULL)
4991 htab->params->object_in_toc = 1;
4992 }
4993
4994 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4995 {
4996 if (abiversion (ibfd) == 0)
4997 set_abiversion (ibfd, 2);
4998 else if (abiversion (ibfd) == 1)
4999 {
5000 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5001 " for ABI version 1\n"), name);
5002 bfd_set_error (bfd_error_bad_value);
5003 return FALSE;
5004 }
5005 }
5006
5007 return TRUE;
5008 }
5009
5010 /* Merge non-visibility st_other attributes: local entry point. */
5011
5012 static void
5013 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5014 const Elf_Internal_Sym *isym,
5015 bfd_boolean definition,
5016 bfd_boolean dynamic)
5017 {
5018 if (definition && (!dynamic || !h->def_regular))
5019 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5020 | ELF_ST_VISIBILITY (h->other));
5021 }
5022
5023 /* Hook called on merging a symbol. We use this to clear "fake" since
5024 we now have a real symbol. */
5025
5026 static bfd_boolean
5027 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5028 const Elf_Internal_Sym *isym,
5029 asection **psec ATTRIBUTE_UNUSED,
5030 bfd_boolean newdef ATTRIBUTE_UNUSED,
5031 bfd_boolean olddef ATTRIBUTE_UNUSED,
5032 bfd *oldbfd ATTRIBUTE_UNUSED,
5033 const asection *oldsec ATTRIBUTE_UNUSED)
5034 {
5035 ((struct ppc_link_hash_entry *) h)->fake = 0;
5036 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5037 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5038 return TRUE;
5039 }
5040
5041 /* This function makes an old ABI object reference to ".bar" cause the
5042 inclusion of a new ABI object archive that defines "bar".
5043 NAME is a symbol defined in an archive. Return a symbol in the hash
5044 table that might be satisfied by the archive symbols. */
5045
5046 static struct elf_link_hash_entry *
5047 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5048 struct bfd_link_info *info,
5049 const char *name)
5050 {
5051 struct elf_link_hash_entry *h;
5052 char *dot_name;
5053 size_t len;
5054
5055 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5056 if (h != NULL
5057 /* Don't return this sym if it is a fake function descriptor
5058 created by add_symbol_adjust. */
5059 && !((struct ppc_link_hash_entry *) h)->fake)
5060 return h;
5061
5062 if (name[0] == '.')
5063 return h;
5064
5065 len = strlen (name);
5066 dot_name = bfd_alloc (abfd, len + 2);
5067 if (dot_name == NULL)
5068 return (struct elf_link_hash_entry *) 0 - 1;
5069 dot_name[0] = '.';
5070 memcpy (dot_name + 1, name, len + 1);
5071 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5072 bfd_release (abfd, dot_name);
5073 return h;
5074 }
5075
5076 /* This function satisfies all old ABI object references to ".bar" if a
5077 new ABI object defines "bar". Well, at least, undefined dot symbols
5078 are made weak. This stops later archive searches from including an
5079 object if we already have a function descriptor definition. It also
5080 prevents the linker complaining about undefined symbols.
5081 We also check and correct mismatched symbol visibility here. The
5082 most restrictive visibility of the function descriptor and the
5083 function entry symbol is used. */
5084
5085 static bfd_boolean
5086 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5087 {
5088 struct ppc_link_hash_table *htab;
5089 struct ppc_link_hash_entry *fdh;
5090
5091 if (eh->elf.root.type == bfd_link_hash_warning)
5092 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5093
5094 if (eh->elf.root.type == bfd_link_hash_indirect)
5095 return TRUE;
5096
5097 if (eh->elf.root.root.string[0] != '.')
5098 abort ();
5099
5100 htab = ppc_hash_table (info);
5101 if (htab == NULL)
5102 return FALSE;
5103
5104 fdh = lookup_fdh (eh, htab);
5105 if (fdh == NULL
5106 && !bfd_link_relocatable (info)
5107 && (eh->elf.root.type == bfd_link_hash_undefined
5108 || eh->elf.root.type == bfd_link_hash_undefweak)
5109 && eh->elf.ref_regular)
5110 {
5111 /* Make an undefined function descriptor sym, in order to
5112 pull in an --as-needed shared lib. Archives are handled
5113 elsewhere. */
5114 fdh = make_fdh (info, eh);
5115 if (fdh == NULL)
5116 return FALSE;
5117 }
5118
5119 if (fdh != NULL)
5120 {
5121 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5122 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5123
5124 /* Make both descriptor and entry symbol have the most
5125 constraining visibility of either symbol. */
5126 if (entry_vis < descr_vis)
5127 fdh->elf.other += entry_vis - descr_vis;
5128 else if (entry_vis > descr_vis)
5129 eh->elf.other += descr_vis - entry_vis;
5130
5131 /* Propagate reference flags from entry symbol to function
5132 descriptor symbol. */
5133 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5134 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5135 fdh->elf.ref_regular |= eh->elf.ref_regular;
5136 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5137
5138 if (!fdh->elf.forced_local
5139 && fdh->elf.dynindx == -1
5140 && fdh->elf.versioned != versioned_hidden
5141 && (bfd_link_dll (info)
5142 || fdh->elf.def_dynamic
5143 || fdh->elf.ref_dynamic)
5144 && (eh->elf.ref_regular
5145 || eh->elf.def_regular))
5146 {
5147 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5148 return FALSE;
5149 }
5150 }
5151
5152 return TRUE;
5153 }
5154
5155 /* Set up opd section info and abiversion for IBFD, and process list
5156 of dot-symbols we made in link_hash_newfunc. */
5157
5158 static bfd_boolean
5159 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5160 {
5161 struct ppc_link_hash_table *htab;
5162 struct ppc_link_hash_entry **p, *eh;
5163 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5164
5165 if (opd != NULL && opd->size != 0)
5166 {
5167 if (abiversion (ibfd) == 0)
5168 set_abiversion (ibfd, 1);
5169 else if (abiversion (ibfd) >= 2)
5170 {
5171 /* xgettext:c-format */
5172 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5173 " version %d\n"),
5174 ibfd, abiversion (ibfd));
5175 bfd_set_error (bfd_error_bad_value);
5176 return FALSE;
5177 }
5178
5179 if ((ibfd->flags & DYNAMIC) == 0
5180 && (opd->flags & SEC_RELOC) != 0
5181 && opd->reloc_count != 0
5182 && !bfd_is_abs_section (opd->output_section))
5183 {
5184 /* Garbage collection needs some extra help with .opd sections.
5185 We don't want to necessarily keep everything referenced by
5186 relocs in .opd, as that would keep all functions. Instead,
5187 if we reference an .opd symbol (a function descriptor), we
5188 want to keep the function code symbol's section. This is
5189 easy for global symbols, but for local syms we need to keep
5190 information about the associated function section. */
5191 bfd_size_type amt;
5192 asection **opd_sym_map;
5193
5194 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5195 opd_sym_map = bfd_zalloc (ibfd, amt);
5196 if (opd_sym_map == NULL)
5197 return FALSE;
5198 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5199 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5200 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5201 }
5202 }
5203
5204 if (!is_ppc64_elf (info->output_bfd))
5205 return TRUE;
5206 htab = ppc_hash_table (info);
5207 if (htab == NULL)
5208 return FALSE;
5209
5210 /* For input files without an explicit abiversion in e_flags
5211 we should have flagged any with symbol st_other bits set
5212 as ELFv1 and above flagged those with .opd as ELFv2.
5213 Set the output abiversion if not yet set, and for any input
5214 still ambiguous, take its abiversion from the output.
5215 Differences in ABI are reported later. */
5216 if (abiversion (info->output_bfd) == 0)
5217 set_abiversion (info->output_bfd, abiversion (ibfd));
5218 else if (abiversion (ibfd) == 0)
5219 set_abiversion (ibfd, abiversion (info->output_bfd));
5220
5221 p = &htab->dot_syms;
5222 while ((eh = *p) != NULL)
5223 {
5224 *p = NULL;
5225 if (&eh->elf == htab->elf.hgot)
5226 ;
5227 else if (htab->elf.hgot == NULL
5228 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5229 htab->elf.hgot = &eh->elf;
5230 else if (abiversion (ibfd) <= 1)
5231 {
5232 htab->need_func_desc_adj = 1;
5233 if (!add_symbol_adjust (eh, info))
5234 return FALSE;
5235 }
5236 p = &eh->u.next_dot_sym;
5237 }
5238 return TRUE;
5239 }
5240
5241 /* Undo hash table changes when an --as-needed input file is determined
5242 not to be needed. */
5243
5244 static bfd_boolean
5245 ppc64_elf_notice_as_needed (bfd *ibfd,
5246 struct bfd_link_info *info,
5247 enum notice_asneeded_action act)
5248 {
5249 if (act == notice_not_needed)
5250 {
5251 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5252
5253 if (htab == NULL)
5254 return FALSE;
5255
5256 htab->dot_syms = NULL;
5257 }
5258 return _bfd_elf_notice_as_needed (ibfd, info, act);
5259 }
5260
5261 /* If --just-symbols against a final linked binary, then assume we need
5262 toc adjusting stubs when calling functions defined there. */
5263
5264 static void
5265 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5266 {
5267 if ((sec->flags & SEC_CODE) != 0
5268 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5269 && is_ppc64_elf (sec->owner))
5270 {
5271 if (abiversion (sec->owner) >= 2
5272 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5273 sec->has_toc_reloc = 1;
5274 }
5275 _bfd_elf_link_just_syms (sec, info);
5276 }
5277
5278 static struct plt_entry **
5279 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5280 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5281 {
5282 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5283 struct plt_entry **local_plt;
5284 unsigned char *local_got_tls_masks;
5285
5286 if (local_got_ents == NULL)
5287 {
5288 bfd_size_type size = symtab_hdr->sh_info;
5289
5290 size *= (sizeof (*local_got_ents)
5291 + sizeof (*local_plt)
5292 + sizeof (*local_got_tls_masks));
5293 local_got_ents = bfd_zalloc (abfd, size);
5294 if (local_got_ents == NULL)
5295 return NULL;
5296 elf_local_got_ents (abfd) = local_got_ents;
5297 }
5298
5299 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5300 {
5301 struct got_entry *ent;
5302
5303 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5304 if (ent->addend == r_addend
5305 && ent->owner == abfd
5306 && ent->tls_type == tls_type)
5307 break;
5308 if (ent == NULL)
5309 {
5310 bfd_size_type amt = sizeof (*ent);
5311 ent = bfd_alloc (abfd, amt);
5312 if (ent == NULL)
5313 return FALSE;
5314 ent->next = local_got_ents[r_symndx];
5315 ent->addend = r_addend;
5316 ent->owner = abfd;
5317 ent->tls_type = tls_type;
5318 ent->is_indirect = FALSE;
5319 ent->got.refcount = 0;
5320 local_got_ents[r_symndx] = ent;
5321 }
5322 ent->got.refcount += 1;
5323 }
5324
5325 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5326 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5327 local_got_tls_masks[r_symndx] |= tls_type;
5328
5329 return local_plt + r_symndx;
5330 }
5331
5332 static bfd_boolean
5333 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5334 {
5335 struct plt_entry *ent;
5336
5337 for (ent = *plist; ent != NULL; ent = ent->next)
5338 if (ent->addend == addend)
5339 break;
5340 if (ent == NULL)
5341 {
5342 bfd_size_type amt = sizeof (*ent);
5343 ent = bfd_alloc (abfd, amt);
5344 if (ent == NULL)
5345 return FALSE;
5346 ent->next = *plist;
5347 ent->addend = addend;
5348 ent->plt.refcount = 0;
5349 *plist = ent;
5350 }
5351 ent->plt.refcount += 1;
5352 return TRUE;
5353 }
5354
5355 static bfd_boolean
5356 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5357 {
5358 return (r_type == R_PPC64_REL24
5359 || r_type == R_PPC64_REL14
5360 || r_type == R_PPC64_REL14_BRTAKEN
5361 || r_type == R_PPC64_REL14_BRNTAKEN
5362 || r_type == R_PPC64_ADDR24
5363 || r_type == R_PPC64_ADDR14
5364 || r_type == R_PPC64_ADDR14_BRTAKEN
5365 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5366 }
5367
5368 /* Look through the relocs for a section during the first phase, and
5369 calculate needed space in the global offset table, procedure
5370 linkage table, and dynamic reloc sections. */
5371
5372 static bfd_boolean
5373 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5374 asection *sec, const Elf_Internal_Rela *relocs)
5375 {
5376 struct ppc_link_hash_table *htab;
5377 Elf_Internal_Shdr *symtab_hdr;
5378 struct elf_link_hash_entry **sym_hashes;
5379 const Elf_Internal_Rela *rel;
5380 const Elf_Internal_Rela *rel_end;
5381 asection *sreloc;
5382 asection **opd_sym_map;
5383 struct elf_link_hash_entry *tga, *dottga;
5384
5385 if (bfd_link_relocatable (info))
5386 return TRUE;
5387
5388 /* Don't do anything special with non-loaded, non-alloced sections.
5389 In particular, any relocs in such sections should not affect GOT
5390 and PLT reference counting (ie. we don't allow them to create GOT
5391 or PLT entries), there's no possibility or desire to optimize TLS
5392 relocs, and there's not much point in propagating relocs to shared
5393 libs that the dynamic linker won't relocate. */
5394 if ((sec->flags & SEC_ALLOC) == 0)
5395 return TRUE;
5396
5397 BFD_ASSERT (is_ppc64_elf (abfd));
5398
5399 htab = ppc_hash_table (info);
5400 if (htab == NULL)
5401 return FALSE;
5402
5403 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5404 FALSE, FALSE, TRUE);
5405 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5406 FALSE, FALSE, TRUE);
5407 symtab_hdr = &elf_symtab_hdr (abfd);
5408 sym_hashes = elf_sym_hashes (abfd);
5409 sreloc = NULL;
5410 opd_sym_map = NULL;
5411 if (ppc64_elf_section_data (sec) != NULL
5412 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5413 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5414
5415 rel_end = relocs + sec->reloc_count;
5416 for (rel = relocs; rel < rel_end; rel++)
5417 {
5418 unsigned long r_symndx;
5419 struct elf_link_hash_entry *h;
5420 enum elf_ppc64_reloc_type r_type;
5421 int tls_type;
5422 struct _ppc64_elf_section_data *ppc64_sec;
5423 struct plt_entry **ifunc, **plt_list;
5424
5425 r_symndx = ELF64_R_SYM (rel->r_info);
5426 if (r_symndx < symtab_hdr->sh_info)
5427 h = NULL;
5428 else
5429 {
5430 struct ppc_link_hash_entry *eh;
5431
5432 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5433 h = elf_follow_link (h);
5434 eh = (struct ppc_link_hash_entry *) h;
5435
5436 /* PR15323, ref flags aren't set for references in the same
5437 object. */
5438 h->root.non_ir_ref_regular = 1;
5439 if (eh->is_func && eh->oh != NULL)
5440 eh->oh->elf.root.non_ir_ref_regular = 1;
5441
5442 if (h == htab->elf.hgot)
5443 sec->has_toc_reloc = 1;
5444 }
5445
5446 tls_type = 0;
5447 ifunc = NULL;
5448 if (h != NULL)
5449 {
5450 if (h->type == STT_GNU_IFUNC)
5451 {
5452 h->needs_plt = 1;
5453 ifunc = &h->plt.plist;
5454 }
5455 }
5456 else
5457 {
5458 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5459 abfd, r_symndx);
5460 if (isym == NULL)
5461 return FALSE;
5462
5463 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5464 {
5465 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5466 rel->r_addend, PLT_IFUNC);
5467 if (ifunc == NULL)
5468 return FALSE;
5469 }
5470 }
5471
5472 r_type = ELF64_R_TYPE (rel->r_info);
5473 switch (r_type)
5474 {
5475 case R_PPC64_TLSGD:
5476 case R_PPC64_TLSLD:
5477 /* These special tls relocs tie a call to __tls_get_addr with
5478 its parameter symbol. */
5479 break;
5480
5481 case R_PPC64_GOT_TLSLD16:
5482 case R_PPC64_GOT_TLSLD16_LO:
5483 case R_PPC64_GOT_TLSLD16_HI:
5484 case R_PPC64_GOT_TLSLD16_HA:
5485 tls_type = TLS_TLS | TLS_LD;
5486 goto dogottls;
5487
5488 case R_PPC64_GOT_TLSGD16:
5489 case R_PPC64_GOT_TLSGD16_LO:
5490 case R_PPC64_GOT_TLSGD16_HI:
5491 case R_PPC64_GOT_TLSGD16_HA:
5492 tls_type = TLS_TLS | TLS_GD;
5493 goto dogottls;
5494
5495 case R_PPC64_GOT_TPREL16_DS:
5496 case R_PPC64_GOT_TPREL16_LO_DS:
5497 case R_PPC64_GOT_TPREL16_HI:
5498 case R_PPC64_GOT_TPREL16_HA:
5499 if (bfd_link_pic (info))
5500 info->flags |= DF_STATIC_TLS;
5501 tls_type = TLS_TLS | TLS_TPREL;
5502 goto dogottls;
5503
5504 case R_PPC64_GOT_DTPREL16_DS:
5505 case R_PPC64_GOT_DTPREL16_LO_DS:
5506 case R_PPC64_GOT_DTPREL16_HI:
5507 case R_PPC64_GOT_DTPREL16_HA:
5508 tls_type = TLS_TLS | TLS_DTPREL;
5509 dogottls:
5510 sec->has_tls_reloc = 1;
5511 /* Fall through */
5512
5513 case R_PPC64_GOT16:
5514 case R_PPC64_GOT16_DS:
5515 case R_PPC64_GOT16_HA:
5516 case R_PPC64_GOT16_HI:
5517 case R_PPC64_GOT16_LO:
5518 case R_PPC64_GOT16_LO_DS:
5519 /* This symbol requires a global offset table entry. */
5520 sec->has_toc_reloc = 1;
5521 if (r_type == R_PPC64_GOT_TLSLD16
5522 || r_type == R_PPC64_GOT_TLSGD16
5523 || r_type == R_PPC64_GOT_TPREL16_DS
5524 || r_type == R_PPC64_GOT_DTPREL16_DS
5525 || r_type == R_PPC64_GOT16
5526 || r_type == R_PPC64_GOT16_DS)
5527 {
5528 htab->do_multi_toc = 1;
5529 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5530 }
5531
5532 if (ppc64_elf_tdata (abfd)->got == NULL
5533 && !create_got_section (abfd, info))
5534 return FALSE;
5535
5536 if (h != NULL)
5537 {
5538 struct ppc_link_hash_entry *eh;
5539 struct got_entry *ent;
5540
5541 eh = (struct ppc_link_hash_entry *) h;
5542 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5543 if (ent->addend == rel->r_addend
5544 && ent->owner == abfd
5545 && ent->tls_type == tls_type)
5546 break;
5547 if (ent == NULL)
5548 {
5549 bfd_size_type amt = sizeof (*ent);
5550 ent = bfd_alloc (abfd, amt);
5551 if (ent == NULL)
5552 return FALSE;
5553 ent->next = eh->elf.got.glist;
5554 ent->addend = rel->r_addend;
5555 ent->owner = abfd;
5556 ent->tls_type = tls_type;
5557 ent->is_indirect = FALSE;
5558 ent->got.refcount = 0;
5559 eh->elf.got.glist = ent;
5560 }
5561 ent->got.refcount += 1;
5562 eh->tls_mask |= tls_type;
5563 }
5564 else
5565 /* This is a global offset table entry for a local symbol. */
5566 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5567 rel->r_addend, tls_type))
5568 return FALSE;
5569
5570 /* We may also need a plt entry if the symbol turns out to be
5571 an ifunc. */
5572 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5573 {
5574 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5575 return FALSE;
5576 }
5577 break;
5578
5579 case R_PPC64_PLT16_HA:
5580 case R_PPC64_PLT16_HI:
5581 case R_PPC64_PLT16_LO:
5582 case R_PPC64_PLT32:
5583 case R_PPC64_PLT64:
5584 /* This symbol requires a procedure linkage table entry. */
5585 plt_list = ifunc;
5586 if (h != NULL)
5587 {
5588 h->needs_plt = 1;
5589 if (h->root.root.string[0] == '.'
5590 && h->root.root.string[1] != '\0')
5591 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5592 plt_list = &h->plt.plist;
5593 }
5594 if (plt_list == NULL)
5595 {
5596 /* It does not make sense to have a procedure linkage
5597 table entry for a non-ifunc local symbol. */
5598 info->callbacks->einfo
5599 /* xgettext:c-format */
5600 (_("%H: %s reloc against local symbol\n"),
5601 abfd, sec, rel->r_offset,
5602 ppc64_elf_howto_table[r_type]->name);
5603 bfd_set_error (bfd_error_bad_value);
5604 return FALSE;
5605 }
5606 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5607 return FALSE;
5608 break;
5609
5610 /* The following relocations don't need to propagate the
5611 relocation if linking a shared object since they are
5612 section relative. */
5613 case R_PPC64_SECTOFF:
5614 case R_PPC64_SECTOFF_LO:
5615 case R_PPC64_SECTOFF_HI:
5616 case R_PPC64_SECTOFF_HA:
5617 case R_PPC64_SECTOFF_DS:
5618 case R_PPC64_SECTOFF_LO_DS:
5619 case R_PPC64_DTPREL16:
5620 case R_PPC64_DTPREL16_LO:
5621 case R_PPC64_DTPREL16_HI:
5622 case R_PPC64_DTPREL16_HA:
5623 case R_PPC64_DTPREL16_DS:
5624 case R_PPC64_DTPREL16_LO_DS:
5625 case R_PPC64_DTPREL16_HIGH:
5626 case R_PPC64_DTPREL16_HIGHA:
5627 case R_PPC64_DTPREL16_HIGHER:
5628 case R_PPC64_DTPREL16_HIGHERA:
5629 case R_PPC64_DTPREL16_HIGHEST:
5630 case R_PPC64_DTPREL16_HIGHESTA:
5631 break;
5632
5633 /* Nor do these. */
5634 case R_PPC64_REL16:
5635 case R_PPC64_REL16_LO:
5636 case R_PPC64_REL16_HI:
5637 case R_PPC64_REL16_HA:
5638 case R_PPC64_REL16DX_HA:
5639 break;
5640
5641 /* Not supported as a dynamic relocation. */
5642 case R_PPC64_ADDR64_LOCAL:
5643 if (bfd_link_pic (info))
5644 {
5645 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5646 ppc_howto_init ();
5647 /* xgettext:c-format */
5648 info->callbacks->einfo (_("%H: %s reloc unsupported "
5649 "in shared libraries and PIEs.\n"),
5650 abfd, sec, rel->r_offset,
5651 ppc64_elf_howto_table[r_type]->name);
5652 bfd_set_error (bfd_error_bad_value);
5653 return FALSE;
5654 }
5655 break;
5656
5657 case R_PPC64_TOC16:
5658 case R_PPC64_TOC16_DS:
5659 htab->do_multi_toc = 1;
5660 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5661 /* Fall through. */
5662 case R_PPC64_TOC16_LO:
5663 case R_PPC64_TOC16_HI:
5664 case R_PPC64_TOC16_HA:
5665 case R_PPC64_TOC16_LO_DS:
5666 sec->has_toc_reloc = 1;
5667 break;
5668
5669 /* Marker reloc. */
5670 case R_PPC64_ENTRY:
5671 break;
5672
5673 /* This relocation describes the C++ object vtable hierarchy.
5674 Reconstruct it for later use during GC. */
5675 case R_PPC64_GNU_VTINHERIT:
5676 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5677 return FALSE;
5678 break;
5679
5680 /* This relocation describes which C++ vtable entries are actually
5681 used. Record for later use during GC. */
5682 case R_PPC64_GNU_VTENTRY:
5683 BFD_ASSERT (h != NULL);
5684 if (h != NULL
5685 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5686 return FALSE;
5687 break;
5688
5689 case R_PPC64_REL14:
5690 case R_PPC64_REL14_BRTAKEN:
5691 case R_PPC64_REL14_BRNTAKEN:
5692 {
5693 asection *dest = NULL;
5694
5695 /* Heuristic: If jumping outside our section, chances are
5696 we are going to need a stub. */
5697 if (h != NULL)
5698 {
5699 /* If the sym is weak it may be overridden later, so
5700 don't assume we know where a weak sym lives. */
5701 if (h->root.type == bfd_link_hash_defined)
5702 dest = h->root.u.def.section;
5703 }
5704 else
5705 {
5706 Elf_Internal_Sym *isym;
5707
5708 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5709 abfd, r_symndx);
5710 if (isym == NULL)
5711 return FALSE;
5712
5713 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5714 }
5715
5716 if (dest != sec)
5717 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5718 }
5719 /* Fall through. */
5720
5721 case R_PPC64_REL24:
5722 plt_list = ifunc;
5723 if (h != NULL)
5724 {
5725 h->needs_plt = 1;
5726 if (h->root.root.string[0] == '.'
5727 && h->root.root.string[1] != '\0')
5728 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5729
5730 if (h == tga || h == dottga)
5731 {
5732 sec->has_tls_reloc = 1;
5733 if (rel != relocs
5734 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5735 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5736 /* We have a new-style __tls_get_addr call with
5737 a marker reloc. */
5738 ;
5739 else
5740 /* Mark this section as having an old-style call. */
5741 sec->has_tls_get_addr_call = 1;
5742 }
5743 plt_list = &h->plt.plist;
5744 }
5745
5746 /* We may need a .plt entry if the function this reloc
5747 refers to is in a shared lib. */
5748 if (plt_list
5749 && !update_plt_info (abfd, plt_list, rel->r_addend))
5750 return FALSE;
5751 break;
5752
5753 case R_PPC64_ADDR14:
5754 case R_PPC64_ADDR14_BRNTAKEN:
5755 case R_PPC64_ADDR14_BRTAKEN:
5756 case R_PPC64_ADDR24:
5757 goto dodyn;
5758
5759 case R_PPC64_TPREL64:
5760 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5761 if (bfd_link_pic (info))
5762 info->flags |= DF_STATIC_TLS;
5763 goto dotlstoc;
5764
5765 case R_PPC64_DTPMOD64:
5766 if (rel + 1 < rel_end
5767 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5768 && rel[1].r_offset == rel->r_offset + 8)
5769 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5770 else
5771 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5772 goto dotlstoc;
5773
5774 case R_PPC64_DTPREL64:
5775 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5776 if (rel != relocs
5777 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5778 && rel[-1].r_offset == rel->r_offset - 8)
5779 /* This is the second reloc of a dtpmod, dtprel pair.
5780 Don't mark with TLS_DTPREL. */
5781 goto dodyn;
5782
5783 dotlstoc:
5784 sec->has_tls_reloc = 1;
5785 if (h != NULL)
5786 {
5787 struct ppc_link_hash_entry *eh;
5788 eh = (struct ppc_link_hash_entry *) h;
5789 eh->tls_mask |= tls_type;
5790 }
5791 else
5792 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5793 rel->r_addend, tls_type))
5794 return FALSE;
5795
5796 ppc64_sec = ppc64_elf_section_data (sec);
5797 if (ppc64_sec->sec_type != sec_toc)
5798 {
5799 bfd_size_type amt;
5800
5801 /* One extra to simplify get_tls_mask. */
5802 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5803 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5804 if (ppc64_sec->u.toc.symndx == NULL)
5805 return FALSE;
5806 amt = sec->size * sizeof (bfd_vma) / 8;
5807 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5808 if (ppc64_sec->u.toc.add == NULL)
5809 return FALSE;
5810 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5811 ppc64_sec->sec_type = sec_toc;
5812 }
5813 BFD_ASSERT (rel->r_offset % 8 == 0);
5814 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5815 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5816
5817 /* Mark the second slot of a GD or LD entry.
5818 -1 to indicate GD and -2 to indicate LD. */
5819 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5820 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5821 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5822 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5823 goto dodyn;
5824
5825 case R_PPC64_TPREL16:
5826 case R_PPC64_TPREL16_LO:
5827 case R_PPC64_TPREL16_HI:
5828 case R_PPC64_TPREL16_HA:
5829 case R_PPC64_TPREL16_DS:
5830 case R_PPC64_TPREL16_LO_DS:
5831 case R_PPC64_TPREL16_HIGH:
5832 case R_PPC64_TPREL16_HIGHA:
5833 case R_PPC64_TPREL16_HIGHER:
5834 case R_PPC64_TPREL16_HIGHERA:
5835 case R_PPC64_TPREL16_HIGHEST:
5836 case R_PPC64_TPREL16_HIGHESTA:
5837 if (bfd_link_pic (info))
5838 {
5839 info->flags |= DF_STATIC_TLS;
5840 goto dodyn;
5841 }
5842 break;
5843
5844 case R_PPC64_ADDR64:
5845 if (opd_sym_map != NULL
5846 && rel + 1 < rel_end
5847 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5848 {
5849 if (h != NULL)
5850 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5851 else
5852 {
5853 asection *s;
5854 Elf_Internal_Sym *isym;
5855
5856 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5857 abfd, r_symndx);
5858 if (isym == NULL)
5859 return FALSE;
5860
5861 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5862 if (s != NULL && s != sec)
5863 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5864 }
5865 }
5866 /* Fall through. */
5867
5868 case R_PPC64_ADDR16:
5869 case R_PPC64_ADDR16_DS:
5870 case R_PPC64_ADDR16_HA:
5871 case R_PPC64_ADDR16_HI:
5872 case R_PPC64_ADDR16_HIGH:
5873 case R_PPC64_ADDR16_HIGHA:
5874 case R_PPC64_ADDR16_HIGHER:
5875 case R_PPC64_ADDR16_HIGHERA:
5876 case R_PPC64_ADDR16_HIGHEST:
5877 case R_PPC64_ADDR16_HIGHESTA:
5878 case R_PPC64_ADDR16_LO:
5879 case R_PPC64_ADDR16_LO_DS:
5880 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5881 && rel->r_addend == 0)
5882 {
5883 /* We may need a .plt entry if this reloc refers to a
5884 function in a shared lib. */
5885 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5886 return FALSE;
5887 h->pointer_equality_needed = 1;
5888 }
5889 /* Fall through. */
5890
5891 case R_PPC64_REL30:
5892 case R_PPC64_REL32:
5893 case R_PPC64_REL64:
5894 case R_PPC64_ADDR32:
5895 case R_PPC64_UADDR16:
5896 case R_PPC64_UADDR32:
5897 case R_PPC64_UADDR64:
5898 case R_PPC64_TOC:
5899 if (h != NULL && !bfd_link_pic (info))
5900 /* We may need a copy reloc. */
5901 h->non_got_ref = 1;
5902
5903 /* Don't propagate .opd relocs. */
5904 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5905 break;
5906
5907 /* If we are creating a shared library, and this is a reloc
5908 against a global symbol, or a non PC relative reloc
5909 against a local symbol, then we need to copy the reloc
5910 into the shared library. However, if we are linking with
5911 -Bsymbolic, we do not need to copy a reloc against a
5912 global symbol which is defined in an object we are
5913 including in the link (i.e., DEF_REGULAR is set). At
5914 this point we have not seen all the input files, so it is
5915 possible that DEF_REGULAR is not set now but will be set
5916 later (it is never cleared). In case of a weak definition,
5917 DEF_REGULAR may be cleared later by a strong definition in
5918 a shared library. We account for that possibility below by
5919 storing information in the dyn_relocs field of the hash
5920 table entry. A similar situation occurs when creating
5921 shared libraries and symbol visibility changes render the
5922 symbol local.
5923
5924 If on the other hand, we are creating an executable, we
5925 may need to keep relocations for symbols satisfied by a
5926 dynamic library if we manage to avoid copy relocs for the
5927 symbol. */
5928 dodyn:
5929 if ((bfd_link_pic (info)
5930 && (must_be_dyn_reloc (info, r_type)
5931 || (h != NULL
5932 && (!SYMBOLIC_BIND (info, h)
5933 || h->root.type == bfd_link_hash_defweak
5934 || !h->def_regular))))
5935 || (ELIMINATE_COPY_RELOCS
5936 && !bfd_link_pic (info)
5937 && h != NULL
5938 && (h->root.type == bfd_link_hash_defweak
5939 || !h->def_regular))
5940 || (!bfd_link_pic (info)
5941 && ifunc != NULL))
5942 {
5943 /* We must copy these reloc types into the output file.
5944 Create a reloc section in dynobj and make room for
5945 this reloc. */
5946 if (sreloc == NULL)
5947 {
5948 sreloc = _bfd_elf_make_dynamic_reloc_section
5949 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5950
5951 if (sreloc == NULL)
5952 return FALSE;
5953 }
5954
5955 /* If this is a global symbol, we count the number of
5956 relocations we need for this symbol. */
5957 if (h != NULL)
5958 {
5959 struct elf_dyn_relocs *p;
5960 struct elf_dyn_relocs **head;
5961
5962 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5963 p = *head;
5964 if (p == NULL || p->sec != sec)
5965 {
5966 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5967 if (p == NULL)
5968 return FALSE;
5969 p->next = *head;
5970 *head = p;
5971 p->sec = sec;
5972 p->count = 0;
5973 p->pc_count = 0;
5974 }
5975 p->count += 1;
5976 if (!must_be_dyn_reloc (info, r_type))
5977 p->pc_count += 1;
5978 }
5979 else
5980 {
5981 /* Track dynamic relocs needed for local syms too.
5982 We really need local syms available to do this
5983 easily. Oh well. */
5984 struct ppc_dyn_relocs *p;
5985 struct ppc_dyn_relocs **head;
5986 bfd_boolean is_ifunc;
5987 asection *s;
5988 void *vpp;
5989 Elf_Internal_Sym *isym;
5990
5991 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5992 abfd, r_symndx);
5993 if (isym == NULL)
5994 return FALSE;
5995
5996 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5997 if (s == NULL)
5998 s = sec;
5999
6000 vpp = &elf_section_data (s)->local_dynrel;
6001 head = (struct ppc_dyn_relocs **) vpp;
6002 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6003 p = *head;
6004 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6005 p = p->next;
6006 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6007 {
6008 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6009 if (p == NULL)
6010 return FALSE;
6011 p->next = *head;
6012 *head = p;
6013 p->sec = sec;
6014 p->ifunc = is_ifunc;
6015 p->count = 0;
6016 }
6017 p->count += 1;
6018 }
6019 }
6020 break;
6021
6022 default:
6023 break;
6024 }
6025 }
6026
6027 return TRUE;
6028 }
6029
6030 /* Merge backend specific data from an object file to the output
6031 object file when linking. */
6032
6033 static bfd_boolean
6034 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6035 {
6036 bfd *obfd = info->output_bfd;
6037 unsigned long iflags, oflags;
6038
6039 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6040 return TRUE;
6041
6042 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6043 return TRUE;
6044
6045 if (!_bfd_generic_verify_endian_match (ibfd, info))
6046 return FALSE;
6047
6048 iflags = elf_elfheader (ibfd)->e_flags;
6049 oflags = elf_elfheader (obfd)->e_flags;
6050
6051 if (iflags & ~EF_PPC64_ABI)
6052 {
6053 _bfd_error_handler
6054 /* xgettext:c-format */
6055 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6056 bfd_set_error (bfd_error_bad_value);
6057 return FALSE;
6058 }
6059 else if (iflags != oflags && iflags != 0)
6060 {
6061 _bfd_error_handler
6062 /* xgettext:c-format */
6063 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6064 ibfd, iflags, oflags);
6065 bfd_set_error (bfd_error_bad_value);
6066 return FALSE;
6067 }
6068
6069 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6070
6071 /* Merge Tag_compatibility attributes and any common GNU ones. */
6072 _bfd_elf_merge_object_attributes (ibfd, info);
6073
6074 return TRUE;
6075 }
6076
6077 static bfd_boolean
6078 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6079 {
6080 /* Print normal ELF private data. */
6081 _bfd_elf_print_private_bfd_data (abfd, ptr);
6082
6083 if (elf_elfheader (abfd)->e_flags != 0)
6084 {
6085 FILE *file = ptr;
6086
6087 fprintf (file, _("private flags = 0x%lx:"),
6088 elf_elfheader (abfd)->e_flags);
6089
6090 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6091 fprintf (file, _(" [abiv%ld]"),
6092 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6093 fputc ('\n', file);
6094 }
6095
6096 return TRUE;
6097 }
6098
6099 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6100 of the code entry point, and its section, which must be in the same
6101 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6102
6103 static bfd_vma
6104 opd_entry_value (asection *opd_sec,
6105 bfd_vma offset,
6106 asection **code_sec,
6107 bfd_vma *code_off,
6108 bfd_boolean in_code_sec)
6109 {
6110 bfd *opd_bfd = opd_sec->owner;
6111 Elf_Internal_Rela *relocs;
6112 Elf_Internal_Rela *lo, *hi, *look;
6113 bfd_vma val;
6114
6115 /* No relocs implies we are linking a --just-symbols object, or looking
6116 at a final linked executable with addr2line or somesuch. */
6117 if (opd_sec->reloc_count == 0)
6118 {
6119 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6120
6121 if (contents == NULL)
6122 {
6123 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6124 return (bfd_vma) -1;
6125 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6126 }
6127
6128 /* PR 17512: file: 64b9dfbb. */
6129 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6130 return (bfd_vma) -1;
6131
6132 val = bfd_get_64 (opd_bfd, contents + offset);
6133 if (code_sec != NULL)
6134 {
6135 asection *sec, *likely = NULL;
6136
6137 if (in_code_sec)
6138 {
6139 sec = *code_sec;
6140 if (sec->vma <= val
6141 && val < sec->vma + sec->size)
6142 likely = sec;
6143 else
6144 val = -1;
6145 }
6146 else
6147 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6148 if (sec->vma <= val
6149 && (sec->flags & SEC_LOAD) != 0
6150 && (sec->flags & SEC_ALLOC) != 0)
6151 likely = sec;
6152 if (likely != NULL)
6153 {
6154 *code_sec = likely;
6155 if (code_off != NULL)
6156 *code_off = val - likely->vma;
6157 }
6158 }
6159 return val;
6160 }
6161
6162 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6163
6164 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6165 if (relocs == NULL)
6166 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6167 /* PR 17512: file: df8e1fd6. */
6168 if (relocs == NULL)
6169 return (bfd_vma) -1;
6170
6171 /* Go find the opd reloc at the sym address. */
6172 lo = relocs;
6173 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6174 val = (bfd_vma) -1;
6175 while (lo < hi)
6176 {
6177 look = lo + (hi - lo) / 2;
6178 if (look->r_offset < offset)
6179 lo = look + 1;
6180 else if (look->r_offset > offset)
6181 hi = look;
6182 else
6183 {
6184 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6185
6186 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6187 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6188 {
6189 unsigned long symndx = ELF64_R_SYM (look->r_info);
6190 asection *sec = NULL;
6191
6192 if (symndx >= symtab_hdr->sh_info
6193 && elf_sym_hashes (opd_bfd) != NULL)
6194 {
6195 struct elf_link_hash_entry **sym_hashes;
6196 struct elf_link_hash_entry *rh;
6197
6198 sym_hashes = elf_sym_hashes (opd_bfd);
6199 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6200 if (rh != NULL)
6201 {
6202 rh = elf_follow_link (rh);
6203 if (rh->root.type != bfd_link_hash_defined
6204 && rh->root.type != bfd_link_hash_defweak)
6205 break;
6206 if (rh->root.u.def.section->owner == opd_bfd)
6207 {
6208 val = rh->root.u.def.value;
6209 sec = rh->root.u.def.section;
6210 }
6211 }
6212 }
6213
6214 if (sec == NULL)
6215 {
6216 Elf_Internal_Sym *sym;
6217
6218 if (symndx < symtab_hdr->sh_info)
6219 {
6220 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6221 if (sym == NULL)
6222 {
6223 size_t symcnt = symtab_hdr->sh_info;
6224 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6225 symcnt, 0,
6226 NULL, NULL, NULL);
6227 if (sym == NULL)
6228 break;
6229 symtab_hdr->contents = (bfd_byte *) sym;
6230 }
6231 sym += symndx;
6232 }
6233 else
6234 {
6235 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6236 1, symndx,
6237 NULL, NULL, NULL);
6238 if (sym == NULL)
6239 break;
6240 }
6241 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6242 if (sec == NULL)
6243 break;
6244 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6245 val = sym->st_value;
6246 }
6247
6248 val += look->r_addend;
6249 if (code_off != NULL)
6250 *code_off = val;
6251 if (code_sec != NULL)
6252 {
6253 if (in_code_sec && *code_sec != sec)
6254 return -1;
6255 else
6256 *code_sec = sec;
6257 }
6258 if (sec->output_section != NULL)
6259 val += sec->output_section->vma + sec->output_offset;
6260 }
6261 break;
6262 }
6263 }
6264
6265 return val;
6266 }
6267
6268 /* If the ELF symbol SYM might be a function in SEC, return the
6269 function size and set *CODE_OFF to the function's entry point,
6270 otherwise return zero. */
6271
6272 static bfd_size_type
6273 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6274 bfd_vma *code_off)
6275 {
6276 bfd_size_type size;
6277
6278 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6279 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6280 return 0;
6281
6282 size = 0;
6283 if (!(sym->flags & BSF_SYNTHETIC))
6284 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6285
6286 if (strcmp (sym->section->name, ".opd") == 0)
6287 {
6288 struct _opd_sec_data *opd = get_opd_info (sym->section);
6289 bfd_vma symval = sym->value;
6290
6291 if (opd != NULL
6292 && opd->adjust != NULL
6293 && elf_section_data (sym->section)->relocs != NULL)
6294 {
6295 /* opd_entry_value will use cached relocs that have been
6296 adjusted, but with raw symbols. That means both local
6297 and global symbols need adjusting. */
6298 long adjust = opd->adjust[OPD_NDX (symval)];
6299 if (adjust == -1)
6300 return 0;
6301 symval += adjust;
6302 }
6303
6304 if (opd_entry_value (sym->section, symval,
6305 &sec, code_off, TRUE) == (bfd_vma) -1)
6306 return 0;
6307 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6308 symbol. This size has nothing to do with the code size of the
6309 function, which is what we're supposed to return, but the
6310 code size isn't available without looking up the dot-sym.
6311 However, doing that would be a waste of time particularly
6312 since elf_find_function will look at the dot-sym anyway.
6313 Now, elf_find_function will keep the largest size of any
6314 function sym found at the code address of interest, so return
6315 1 here to avoid it incorrectly caching a larger function size
6316 for a small function. This does mean we return the wrong
6317 size for a new-ABI function of size 24, but all that does is
6318 disable caching for such functions. */
6319 if (size == 24)
6320 size = 1;
6321 }
6322 else
6323 {
6324 if (sym->section != sec)
6325 return 0;
6326 *code_off = sym->value;
6327 }
6328 if (size == 0)
6329 size = 1;
6330 return size;
6331 }
6332
6333 /* Return true if symbol is a strong function defined in an ELFv2
6334 object with st_other localentry bits of zero, ie. its local entry
6335 point coincides with its global entry point. */
6336
6337 static bfd_boolean
6338 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6339 {
6340 return (h != NULL
6341 && h->type == STT_FUNC
6342 && h->root.type == bfd_link_hash_defined
6343 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6344 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6345 && is_ppc64_elf (h->root.u.def.section->owner)
6346 && abiversion (h->root.u.def.section->owner) >= 2);
6347 }
6348
6349 /* Return true if symbol is defined in a regular object file. */
6350
6351 static bfd_boolean
6352 is_static_defined (struct elf_link_hash_entry *h)
6353 {
6354 return ((h->root.type == bfd_link_hash_defined
6355 || h->root.type == bfd_link_hash_defweak)
6356 && h->root.u.def.section != NULL
6357 && h->root.u.def.section->output_section != NULL);
6358 }
6359
6360 /* If FDH is a function descriptor symbol, return the associated code
6361 entry symbol if it is defined. Return NULL otherwise. */
6362
6363 static struct ppc_link_hash_entry *
6364 defined_code_entry (struct ppc_link_hash_entry *fdh)
6365 {
6366 if (fdh->is_func_descriptor)
6367 {
6368 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6369 if (fh->elf.root.type == bfd_link_hash_defined
6370 || fh->elf.root.type == bfd_link_hash_defweak)
6371 return fh;
6372 }
6373 return NULL;
6374 }
6375
6376 /* If FH is a function code entry symbol, return the associated
6377 function descriptor symbol if it is defined. Return NULL otherwise. */
6378
6379 static struct ppc_link_hash_entry *
6380 defined_func_desc (struct ppc_link_hash_entry *fh)
6381 {
6382 if (fh->oh != NULL
6383 && fh->oh->is_func_descriptor)
6384 {
6385 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6386 if (fdh->elf.root.type == bfd_link_hash_defined
6387 || fdh->elf.root.type == bfd_link_hash_defweak)
6388 return fdh;
6389 }
6390 return NULL;
6391 }
6392
6393 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6394
6395 /* Garbage collect sections, after first dealing with dot-symbols. */
6396
6397 static bfd_boolean
6398 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6399 {
6400 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6401
6402 if (htab != NULL && htab->need_func_desc_adj)
6403 {
6404 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6405 htab->need_func_desc_adj = 0;
6406 }
6407 return bfd_elf_gc_sections (abfd, info);
6408 }
6409
6410 /* Mark all our entry sym sections, both opd and code section. */
6411
6412 static void
6413 ppc64_elf_gc_keep (struct bfd_link_info *info)
6414 {
6415 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6416 struct bfd_sym_chain *sym;
6417
6418 if (htab == NULL)
6419 return;
6420
6421 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6422 {
6423 struct ppc_link_hash_entry *eh, *fh;
6424 asection *sec;
6425
6426 eh = (struct ppc_link_hash_entry *)
6427 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6428 if (eh == NULL)
6429 continue;
6430 if (eh->elf.root.type != bfd_link_hash_defined
6431 && eh->elf.root.type != bfd_link_hash_defweak)
6432 continue;
6433
6434 fh = defined_code_entry (eh);
6435 if (fh != NULL)
6436 {
6437 sec = fh->elf.root.u.def.section;
6438 sec->flags |= SEC_KEEP;
6439 }
6440 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6441 && opd_entry_value (eh->elf.root.u.def.section,
6442 eh->elf.root.u.def.value,
6443 &sec, NULL, FALSE) != (bfd_vma) -1)
6444 sec->flags |= SEC_KEEP;
6445
6446 sec = eh->elf.root.u.def.section;
6447 sec->flags |= SEC_KEEP;
6448 }
6449 }
6450
6451 /* Mark sections containing dynamically referenced symbols. When
6452 building shared libraries, we must assume that any visible symbol is
6453 referenced. */
6454
6455 static bfd_boolean
6456 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6457 {
6458 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6459 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6460 struct ppc_link_hash_entry *fdh;
6461 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6462
6463 /* Dynamic linking info is on the func descriptor sym. */
6464 fdh = defined_func_desc (eh);
6465 if (fdh != NULL)
6466 eh = fdh;
6467
6468 if ((eh->elf.root.type == bfd_link_hash_defined
6469 || eh->elf.root.type == bfd_link_hash_defweak)
6470 && (eh->elf.ref_dynamic
6471 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6472 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6473 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6474 && (!bfd_link_executable (info)
6475 || info->gc_keep_exported
6476 || info->export_dynamic
6477 || (eh->elf.dynamic
6478 && d != NULL
6479 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6480 && (eh->elf.versioned >= versioned
6481 || !bfd_hide_sym_by_version (info->version_info,
6482 eh->elf.root.root.string)))))
6483 {
6484 asection *code_sec;
6485 struct ppc_link_hash_entry *fh;
6486
6487 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6488
6489 /* Function descriptor syms cause the associated
6490 function code sym section to be marked. */
6491 fh = defined_code_entry (eh);
6492 if (fh != NULL)
6493 {
6494 code_sec = fh->elf.root.u.def.section;
6495 code_sec->flags |= SEC_KEEP;
6496 }
6497 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6498 && opd_entry_value (eh->elf.root.u.def.section,
6499 eh->elf.root.u.def.value,
6500 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6501 code_sec->flags |= SEC_KEEP;
6502 }
6503
6504 return TRUE;
6505 }
6506
6507 /* Return the section that should be marked against GC for a given
6508 relocation. */
6509
6510 static asection *
6511 ppc64_elf_gc_mark_hook (asection *sec,
6512 struct bfd_link_info *info,
6513 Elf_Internal_Rela *rel,
6514 struct elf_link_hash_entry *h,
6515 Elf_Internal_Sym *sym)
6516 {
6517 asection *rsec;
6518
6519 /* Syms return NULL if we're marking .opd, so we avoid marking all
6520 function sections, as all functions are referenced in .opd. */
6521 rsec = NULL;
6522 if (get_opd_info (sec) != NULL)
6523 return rsec;
6524
6525 if (h != NULL)
6526 {
6527 enum elf_ppc64_reloc_type r_type;
6528 struct ppc_link_hash_entry *eh, *fh, *fdh;
6529
6530 r_type = ELF64_R_TYPE (rel->r_info);
6531 switch (r_type)
6532 {
6533 case R_PPC64_GNU_VTINHERIT:
6534 case R_PPC64_GNU_VTENTRY:
6535 break;
6536
6537 default:
6538 switch (h->root.type)
6539 {
6540 case bfd_link_hash_defined:
6541 case bfd_link_hash_defweak:
6542 eh = (struct ppc_link_hash_entry *) h;
6543 fdh = defined_func_desc (eh);
6544 if (fdh != NULL)
6545 {
6546 /* -mcall-aixdesc code references the dot-symbol on
6547 a call reloc. Mark the function descriptor too
6548 against garbage collection. */
6549 fdh->elf.mark = 1;
6550 if (fdh->elf.u.weakdef != NULL)
6551 fdh->elf.u.weakdef->mark = 1;
6552 eh = fdh;
6553 }
6554
6555 /* Function descriptor syms cause the associated
6556 function code sym section to be marked. */
6557 fh = defined_code_entry (eh);
6558 if (fh != NULL)
6559 {
6560 /* They also mark their opd section. */
6561 eh->elf.root.u.def.section->gc_mark = 1;
6562
6563 rsec = fh->elf.root.u.def.section;
6564 }
6565 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6566 && opd_entry_value (eh->elf.root.u.def.section,
6567 eh->elf.root.u.def.value,
6568 &rsec, NULL, FALSE) != (bfd_vma) -1)
6569 eh->elf.root.u.def.section->gc_mark = 1;
6570 else
6571 rsec = h->root.u.def.section;
6572 break;
6573
6574 case bfd_link_hash_common:
6575 rsec = h->root.u.c.p->section;
6576 break;
6577
6578 default:
6579 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6580 }
6581 }
6582 }
6583 else
6584 {
6585 struct _opd_sec_data *opd;
6586
6587 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6588 opd = get_opd_info (rsec);
6589 if (opd != NULL && opd->func_sec != NULL)
6590 {
6591 rsec->gc_mark = 1;
6592
6593 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6594 }
6595 }
6596
6597 return rsec;
6598 }
6599
6600 /* Update the .got, .plt. and dynamic reloc reference counts for the
6601 section being removed. */
6602
6603 static bfd_boolean
6604 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6605 asection *sec, const Elf_Internal_Rela *relocs)
6606 {
6607 struct ppc_link_hash_table *htab;
6608 Elf_Internal_Shdr *symtab_hdr;
6609 struct elf_link_hash_entry **sym_hashes;
6610 struct got_entry **local_got_ents;
6611 const Elf_Internal_Rela *rel, *relend;
6612
6613 if (bfd_link_relocatable (info))
6614 return TRUE;
6615
6616 if ((sec->flags & SEC_ALLOC) == 0)
6617 return TRUE;
6618
6619 elf_section_data (sec)->local_dynrel = NULL;
6620
6621 htab = ppc_hash_table (info);
6622 if (htab == NULL)
6623 return FALSE;
6624
6625 symtab_hdr = &elf_symtab_hdr (abfd);
6626 sym_hashes = elf_sym_hashes (abfd);
6627 local_got_ents = elf_local_got_ents (abfd);
6628
6629 relend = relocs + sec->reloc_count;
6630 for (rel = relocs; rel < relend; rel++)
6631 {
6632 unsigned long r_symndx;
6633 enum elf_ppc64_reloc_type r_type;
6634 struct elf_link_hash_entry *h = NULL;
6635 struct plt_entry **plt_list = NULL;
6636 unsigned char tls_type = 0;
6637
6638 r_symndx = ELF64_R_SYM (rel->r_info);
6639 r_type = ELF64_R_TYPE (rel->r_info);
6640 if (r_symndx >= symtab_hdr->sh_info)
6641 {
6642 struct ppc_link_hash_entry *eh;
6643 struct elf_dyn_relocs **pp;
6644 struct elf_dyn_relocs *p;
6645
6646 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6647 h = elf_follow_link (h);
6648 eh = (struct ppc_link_hash_entry *) h;
6649
6650 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6651 if (p->sec == sec)
6652 {
6653 /* Everything must go for SEC. */
6654 *pp = p->next;
6655 break;
6656 }
6657 }
6658
6659 switch (r_type)
6660 {
6661 case R_PPC64_GOT_TLSLD16:
6662 case R_PPC64_GOT_TLSLD16_LO:
6663 case R_PPC64_GOT_TLSLD16_HI:
6664 case R_PPC64_GOT_TLSLD16_HA:
6665 tls_type = TLS_TLS | TLS_LD;
6666 goto dogot;
6667
6668 case R_PPC64_GOT_TLSGD16:
6669 case R_PPC64_GOT_TLSGD16_LO:
6670 case R_PPC64_GOT_TLSGD16_HI:
6671 case R_PPC64_GOT_TLSGD16_HA:
6672 tls_type = TLS_TLS | TLS_GD;
6673 goto dogot;
6674
6675 case R_PPC64_GOT_TPREL16_DS:
6676 case R_PPC64_GOT_TPREL16_LO_DS:
6677 case R_PPC64_GOT_TPREL16_HI:
6678 case R_PPC64_GOT_TPREL16_HA:
6679 tls_type = TLS_TLS | TLS_TPREL;
6680 goto dogot;
6681
6682 case R_PPC64_GOT_DTPREL16_DS:
6683 case R_PPC64_GOT_DTPREL16_LO_DS:
6684 case R_PPC64_GOT_DTPREL16_HI:
6685 case R_PPC64_GOT_DTPREL16_HA:
6686 tls_type = TLS_TLS | TLS_DTPREL;
6687 goto dogot;
6688
6689 case R_PPC64_GOT16:
6690 case R_PPC64_GOT16_DS:
6691 case R_PPC64_GOT16_HA:
6692 case R_PPC64_GOT16_HI:
6693 case R_PPC64_GOT16_LO:
6694 case R_PPC64_GOT16_LO_DS:
6695 dogot:
6696 {
6697 struct got_entry *ent;
6698
6699 if (h != NULL)
6700 ent = h->got.glist;
6701 else
6702 ent = local_got_ents[r_symndx];
6703
6704 for (; ent != NULL; ent = ent->next)
6705 if (ent->addend == rel->r_addend
6706 && ent->owner == abfd
6707 && ent->tls_type == tls_type)
6708 break;
6709 if (ent == NULL)
6710 abort ();
6711 if (ent->got.refcount > 0)
6712 ent->got.refcount -= 1;
6713 }
6714 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6715 plt_list = &h->plt.plist;
6716 break;
6717
6718 case R_PPC64_PLT16_HA:
6719 case R_PPC64_PLT16_HI:
6720 case R_PPC64_PLT16_LO:
6721 case R_PPC64_PLT32:
6722 case R_PPC64_PLT64:
6723 case R_PPC64_REL14:
6724 case R_PPC64_REL14_BRNTAKEN:
6725 case R_PPC64_REL14_BRTAKEN:
6726 case R_PPC64_REL24:
6727 if (h != NULL)
6728 plt_list = &h->plt.plist;
6729 else if (local_got_ents != NULL)
6730 {
6731 struct plt_entry **local_plt = (struct plt_entry **)
6732 (local_got_ents + symtab_hdr->sh_info);
6733 unsigned char *local_got_tls_masks = (unsigned char *)
6734 (local_plt + symtab_hdr->sh_info);
6735 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6736 plt_list = local_plt + r_symndx;
6737 }
6738 break;
6739
6740 case R_PPC64_ADDR64:
6741 case R_PPC64_ADDR16:
6742 case R_PPC64_ADDR16_DS:
6743 case R_PPC64_ADDR16_HA:
6744 case R_PPC64_ADDR16_HI:
6745 case R_PPC64_ADDR16_HIGH:
6746 case R_PPC64_ADDR16_HIGHA:
6747 case R_PPC64_ADDR16_HIGHER:
6748 case R_PPC64_ADDR16_HIGHERA:
6749 case R_PPC64_ADDR16_HIGHEST:
6750 case R_PPC64_ADDR16_HIGHESTA:
6751 case R_PPC64_ADDR16_LO:
6752 case R_PPC64_ADDR16_LO_DS:
6753 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6754 && rel->r_addend == 0)
6755 plt_list = &h->plt.plist;
6756 break;
6757
6758 default:
6759 break;
6760 }
6761 if (plt_list != NULL)
6762 {
6763 struct plt_entry *ent;
6764
6765 for (ent = *plt_list; ent != NULL; ent = ent->next)
6766 if (ent->addend == rel->r_addend)
6767 break;
6768 if (ent != NULL && ent->plt.refcount > 0)
6769 ent->plt.refcount -= 1;
6770 }
6771 }
6772 return TRUE;
6773 }
6774
6775 /* The maximum size of .sfpr. */
6776 #define SFPR_MAX (218*4)
6777
6778 struct sfpr_def_parms
6779 {
6780 const char name[12];
6781 unsigned char lo, hi;
6782 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6783 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6784 };
6785
6786 /* Auto-generate _save*, _rest* functions in .sfpr.
6787 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6788 instead. */
6789
6790 static bfd_boolean
6791 sfpr_define (struct bfd_link_info *info,
6792 const struct sfpr_def_parms *parm,
6793 asection *stub_sec)
6794 {
6795 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6796 unsigned int i;
6797 size_t len = strlen (parm->name);
6798 bfd_boolean writing = FALSE;
6799 char sym[16];
6800
6801 if (htab == NULL)
6802 return FALSE;
6803
6804 memcpy (sym, parm->name, len);
6805 sym[len + 2] = 0;
6806
6807 for (i = parm->lo; i <= parm->hi; i++)
6808 {
6809 struct ppc_link_hash_entry *h;
6810
6811 sym[len + 0] = i / 10 + '0';
6812 sym[len + 1] = i % 10 + '0';
6813 h = (struct ppc_link_hash_entry *)
6814 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6815 if (stub_sec != NULL)
6816 {
6817 if (h != NULL
6818 && h->elf.root.type == bfd_link_hash_defined
6819 && h->elf.root.u.def.section == htab->sfpr)
6820 {
6821 struct elf_link_hash_entry *s;
6822 char buf[32];
6823 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6824 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6825 if (s == NULL)
6826 return FALSE;
6827 if (s->root.type == bfd_link_hash_new
6828 || (s->root.type = bfd_link_hash_defined
6829 && s->root.u.def.section == stub_sec))
6830 {
6831 s->root.type = bfd_link_hash_defined;
6832 s->root.u.def.section = stub_sec;
6833 s->root.u.def.value = (stub_sec->size
6834 + h->elf.root.u.def.value);
6835 s->ref_regular = 1;
6836 s->def_regular = 1;
6837 s->ref_regular_nonweak = 1;
6838 s->forced_local = 1;
6839 s->non_elf = 0;
6840 s->root.linker_def = 1;
6841 }
6842 }
6843 continue;
6844 }
6845 if (h != NULL)
6846 {
6847 h->save_res = 1;
6848 if (!h->elf.def_regular)
6849 {
6850 h->elf.root.type = bfd_link_hash_defined;
6851 h->elf.root.u.def.section = htab->sfpr;
6852 h->elf.root.u.def.value = htab->sfpr->size;
6853 h->elf.type = STT_FUNC;
6854 h->elf.def_regular = 1;
6855 h->elf.non_elf = 0;
6856 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6857 writing = TRUE;
6858 if (htab->sfpr->contents == NULL)
6859 {
6860 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6861 if (htab->sfpr->contents == NULL)
6862 return FALSE;
6863 }
6864 }
6865 }
6866 if (writing)
6867 {
6868 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6869 if (i != parm->hi)
6870 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6871 else
6872 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6873 htab->sfpr->size = p - htab->sfpr->contents;
6874 }
6875 }
6876
6877 return TRUE;
6878 }
6879
6880 static bfd_byte *
6881 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6882 {
6883 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6884 return p + 4;
6885 }
6886
6887 static bfd_byte *
6888 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6889 {
6890 p = savegpr0 (abfd, p, r);
6891 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6892 p = p + 4;
6893 bfd_put_32 (abfd, BLR, p);
6894 return p + 4;
6895 }
6896
6897 static bfd_byte *
6898 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6899 {
6900 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6901 return p + 4;
6902 }
6903
6904 static bfd_byte *
6905 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6906 {
6907 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6908 p = p + 4;
6909 p = restgpr0 (abfd, p, r);
6910 bfd_put_32 (abfd, MTLR_R0, p);
6911 p = p + 4;
6912 if (r == 29)
6913 {
6914 p = restgpr0 (abfd, p, 30);
6915 p = restgpr0 (abfd, p, 31);
6916 }
6917 bfd_put_32 (abfd, BLR, p);
6918 return p + 4;
6919 }
6920
6921 static bfd_byte *
6922 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6923 {
6924 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6925 return p + 4;
6926 }
6927
6928 static bfd_byte *
6929 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6930 {
6931 p = savegpr1 (abfd, p, r);
6932 bfd_put_32 (abfd, BLR, p);
6933 return p + 4;
6934 }
6935
6936 static bfd_byte *
6937 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6938 {
6939 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6940 return p + 4;
6941 }
6942
6943 static bfd_byte *
6944 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6945 {
6946 p = restgpr1 (abfd, p, r);
6947 bfd_put_32 (abfd, BLR, p);
6948 return p + 4;
6949 }
6950
6951 static bfd_byte *
6952 savefpr (bfd *abfd, bfd_byte *p, int r)
6953 {
6954 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6955 return p + 4;
6956 }
6957
6958 static bfd_byte *
6959 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6960 {
6961 p = savefpr (abfd, p, r);
6962 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6963 p = p + 4;
6964 bfd_put_32 (abfd, BLR, p);
6965 return p + 4;
6966 }
6967
6968 static bfd_byte *
6969 restfpr (bfd *abfd, bfd_byte *p, int r)
6970 {
6971 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6972 return p + 4;
6973 }
6974
6975 static bfd_byte *
6976 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6977 {
6978 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6979 p = p + 4;
6980 p = restfpr (abfd, p, r);
6981 bfd_put_32 (abfd, MTLR_R0, p);
6982 p = p + 4;
6983 if (r == 29)
6984 {
6985 p = restfpr (abfd, p, 30);
6986 p = restfpr (abfd, p, 31);
6987 }
6988 bfd_put_32 (abfd, BLR, p);
6989 return p + 4;
6990 }
6991
6992 static bfd_byte *
6993 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6994 {
6995 p = savefpr (abfd, p, r);
6996 bfd_put_32 (abfd, BLR, p);
6997 return p + 4;
6998 }
6999
7000 static bfd_byte *
7001 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
7002 {
7003 p = restfpr (abfd, p, r);
7004 bfd_put_32 (abfd, BLR, p);
7005 return p + 4;
7006 }
7007
7008 static bfd_byte *
7009 savevr (bfd *abfd, bfd_byte *p, int r)
7010 {
7011 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7012 p = p + 4;
7013 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
7014 return p + 4;
7015 }
7016
7017 static bfd_byte *
7018 savevr_tail (bfd *abfd, bfd_byte *p, int r)
7019 {
7020 p = savevr (abfd, p, r);
7021 bfd_put_32 (abfd, BLR, p);
7022 return p + 4;
7023 }
7024
7025 static bfd_byte *
7026 restvr (bfd *abfd, bfd_byte *p, int r)
7027 {
7028 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7029 p = p + 4;
7030 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7031 return p + 4;
7032 }
7033
7034 static bfd_byte *
7035 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7036 {
7037 p = restvr (abfd, p, r);
7038 bfd_put_32 (abfd, BLR, p);
7039 return p + 4;
7040 }
7041
7042 /* Called via elf_link_hash_traverse to transfer dynamic linking
7043 information on function code symbol entries to their corresponding
7044 function descriptor symbol entries. */
7045
7046 static bfd_boolean
7047 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7048 {
7049 struct bfd_link_info *info;
7050 struct ppc_link_hash_table *htab;
7051 struct ppc_link_hash_entry *fh;
7052 struct ppc_link_hash_entry *fdh;
7053 bfd_boolean force_local;
7054
7055 fh = (struct ppc_link_hash_entry *) h;
7056 if (fh->elf.root.type == bfd_link_hash_indirect)
7057 return TRUE;
7058
7059 if (!fh->is_func)
7060 return TRUE;
7061
7062 if (fh->elf.root.root.string[0] != '.'
7063 || fh->elf.root.root.string[1] == '\0')
7064 return TRUE;
7065
7066 info = inf;
7067 htab = ppc_hash_table (info);
7068 if (htab == NULL)
7069 return FALSE;
7070
7071 /* Find the corresponding function descriptor symbol. */
7072 fdh = lookup_fdh (fh, htab);
7073
7074 /* Resolve undefined references to dot-symbols as the value
7075 in the function descriptor, if we have one in a regular object.
7076 This is to satisfy cases like ".quad .foo". Calls to functions
7077 in dynamic objects are handled elsewhere. */
7078 if ((fh->elf.root.type == bfd_link_hash_undefined
7079 || fh->elf.root.type == bfd_link_hash_undefweak)
7080 && (fdh->elf.root.type == bfd_link_hash_defined
7081 || fdh->elf.root.type == bfd_link_hash_defweak)
7082 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7083 && opd_entry_value (fdh->elf.root.u.def.section,
7084 fdh->elf.root.u.def.value,
7085 &fh->elf.root.u.def.section,
7086 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7087 {
7088 fh->elf.root.type = fdh->elf.root.type;
7089 fh->elf.forced_local = 1;
7090 fh->elf.def_regular = fdh->elf.def_regular;
7091 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7092 }
7093
7094 if (!fh->elf.dynamic)
7095 {
7096 struct plt_entry *ent;
7097
7098 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7099 if (ent->plt.refcount > 0)
7100 break;
7101 if (ent == NULL)
7102 return TRUE;
7103 }
7104
7105 /* Create a descriptor as undefined if necessary. */
7106 if (fdh == NULL
7107 && !bfd_link_executable (info)
7108 && (fh->elf.root.type == bfd_link_hash_undefined
7109 || fh->elf.root.type == bfd_link_hash_undefweak))
7110 {
7111 fdh = make_fdh (info, fh);
7112 if (fdh == NULL)
7113 return FALSE;
7114 }
7115
7116 /* We can't support overriding of symbols on a fake descriptor. */
7117 if (fdh != NULL
7118 && fdh->fake
7119 && (fh->elf.root.type == bfd_link_hash_defined
7120 || fh->elf.root.type == bfd_link_hash_defweak))
7121 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7122
7123 /* Transfer dynamic linking information to the function descriptor. */
7124 if (fdh != NULL)
7125 {
7126 fdh->elf.ref_regular |= fh->elf.ref_regular;
7127 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7128 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7129 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7130 fdh->elf.dynamic |= fh->elf.dynamic;
7131 fdh->elf.needs_plt |= (fh->elf.needs_plt
7132 || fh->elf.type == STT_FUNC
7133 || fh->elf.type == STT_GNU_IFUNC);
7134 move_plt_plist (fh, fdh);
7135
7136 if (!fdh->elf.forced_local
7137 && fh->elf.dynindx != -1)
7138 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7139 return FALSE;
7140 }
7141
7142 /* Now that the info is on the function descriptor, clear the
7143 function code sym info. Any function code syms for which we
7144 don't have a definition in a regular file, we force local.
7145 This prevents a shared library from exporting syms that have
7146 been imported from another library. Function code syms that
7147 are really in the library we must leave global to prevent the
7148 linker dragging in a definition from a static library. */
7149 force_local = (!fh->elf.def_regular
7150 || fdh == NULL
7151 || !fdh->elf.def_regular
7152 || fdh->elf.forced_local);
7153 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7154
7155 return TRUE;
7156 }
7157
7158 static const struct sfpr_def_parms save_res_funcs[] =
7159 {
7160 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7161 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7162 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7163 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7164 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7165 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7166 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7167 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7168 { "._savef", 14, 31, savefpr, savefpr1_tail },
7169 { "._restf", 14, 31, restfpr, restfpr1_tail },
7170 { "_savevr_", 20, 31, savevr, savevr_tail },
7171 { "_restvr_", 20, 31, restvr, restvr_tail }
7172 };
7173
7174 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7175 this hook to a) provide some gcc support functions, and b) transfer
7176 dynamic linking information gathered so far on function code symbol
7177 entries, to their corresponding function descriptor symbol entries. */
7178
7179 static bfd_boolean
7180 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7181 struct bfd_link_info *info)
7182 {
7183 struct ppc_link_hash_table *htab;
7184
7185 htab = ppc_hash_table (info);
7186 if (htab == NULL)
7187 return FALSE;
7188
7189 /* Provide any missing _save* and _rest* functions. */
7190 if (htab->sfpr != NULL)
7191 {
7192 unsigned int i;
7193
7194 htab->sfpr->size = 0;
7195 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7196 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7197 return FALSE;
7198 if (htab->sfpr->size == 0)
7199 htab->sfpr->flags |= SEC_EXCLUDE;
7200 }
7201
7202 if (bfd_link_relocatable (info))
7203 return TRUE;
7204
7205 if (htab->elf.hgot != NULL)
7206 {
7207 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7208 /* Make .TOC. defined so as to prevent it being made dynamic.
7209 The wrong value here is fixed later in ppc64_elf_set_toc. */
7210 if (!htab->elf.hgot->def_regular
7211 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7212 {
7213 htab->elf.hgot->root.type = bfd_link_hash_defined;
7214 htab->elf.hgot->root.u.def.value = 0;
7215 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7216 htab->elf.hgot->def_regular = 1;
7217 htab->elf.hgot->root.linker_def = 1;
7218 }
7219 htab->elf.hgot->type = STT_OBJECT;
7220 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7221 | STV_HIDDEN);
7222 }
7223
7224 if (htab->need_func_desc_adj)
7225 {
7226 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7227 htab->need_func_desc_adj = 0;
7228 }
7229
7230 return TRUE;
7231 }
7232
7233 /* Return true if we have dynamic relocs against H that apply to
7234 read-only sections. */
7235
7236 static bfd_boolean
7237 readonly_dynrelocs (struct elf_link_hash_entry *h)
7238 {
7239 struct ppc_link_hash_entry *eh;
7240 struct elf_dyn_relocs *p;
7241
7242 eh = (struct ppc_link_hash_entry *) h;
7243 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7244 {
7245 asection *s = p->sec->output_section;
7246
7247 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7248 return TRUE;
7249 }
7250 return FALSE;
7251 }
7252
7253 /* Return true if we have dynamic relocs against H or any of its weak
7254 aliases, that apply to read-only sections. */
7255
7256 static bfd_boolean
7257 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7258 {
7259 struct ppc_link_hash_entry *eh;
7260
7261 eh = (struct ppc_link_hash_entry *) h;
7262 do
7263 {
7264 if (readonly_dynrelocs (&eh->elf))
7265 return TRUE;
7266 eh = eh->weakref;
7267 } while (eh != NULL && &eh->elf != h);
7268
7269 return FALSE;
7270 }
7271
7272 /* Return whether EH has pc-relative dynamic relocs. */
7273
7274 static bfd_boolean
7275 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7276 {
7277 struct elf_dyn_relocs *p;
7278
7279 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7280 if (p->pc_count != 0)
7281 return TRUE;
7282 return FALSE;
7283 }
7284
7285 /* Return true if a global entry stub will be created for H. Valid
7286 for ELFv2 before plt entries have been allocated. */
7287
7288 static bfd_boolean
7289 global_entry_stub (struct elf_link_hash_entry *h)
7290 {
7291 struct plt_entry *pent;
7292
7293 if (!h->pointer_equality_needed
7294 || h->def_regular)
7295 return FALSE;
7296
7297 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7298 if (pent->plt.refcount > 0
7299 && pent->addend == 0)
7300 return TRUE;
7301
7302 return FALSE;
7303 }
7304
7305 /* Adjust a symbol defined by a dynamic object and referenced by a
7306 regular object. The current definition is in some section of the
7307 dynamic object, but we're not including those sections. We have to
7308 change the definition to something the rest of the link can
7309 understand. */
7310
7311 static bfd_boolean
7312 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7313 struct elf_link_hash_entry *h)
7314 {
7315 struct ppc_link_hash_table *htab;
7316 asection *s, *srel;
7317
7318 htab = ppc_hash_table (info);
7319 if (htab == NULL)
7320 return FALSE;
7321
7322 /* Deal with function syms. */
7323 if (h->type == STT_FUNC
7324 || h->type == STT_GNU_IFUNC
7325 || h->needs_plt)
7326 {
7327 /* Clear procedure linkage table information for any symbol that
7328 won't need a .plt entry. */
7329 struct plt_entry *ent;
7330 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7331 if (ent->plt.refcount > 0)
7332 break;
7333 if (ent == NULL
7334 || (h->type != STT_GNU_IFUNC
7335 && (SYMBOL_CALLS_LOCAL (info, h)
7336 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7337 || ((struct ppc_link_hash_entry *) h)->save_res)
7338 {
7339 h->plt.plist = NULL;
7340 h->needs_plt = 0;
7341 h->pointer_equality_needed = 0;
7342 }
7343 else if (abiversion (info->output_bfd) >= 2)
7344 {
7345 /* Taking a function's address in a read/write section
7346 doesn't require us to define the function symbol in the
7347 executable on a global entry stub. A dynamic reloc can
7348 be used instead. The reason we prefer a few more dynamic
7349 relocs is that calling via a global entry stub costs a
7350 few more instructions, and pointer_equality_needed causes
7351 extra work in ld.so when resolving these symbols. */
7352 if (global_entry_stub (h)
7353 && !alias_readonly_dynrelocs (h))
7354 {
7355 h->pointer_equality_needed = 0;
7356 /* After adjust_dynamic_symbol, non_got_ref set in
7357 the non-pic case means that dyn_relocs for this
7358 symbol should be discarded. */
7359 h->non_got_ref = 0;
7360 }
7361
7362 /* If making a plt entry, then we don't need copy relocs. */
7363 return TRUE;
7364 }
7365 }
7366 else
7367 h->plt.plist = NULL;
7368
7369 /* If this is a weak symbol, and there is a real definition, the
7370 processor independent code will have arranged for us to see the
7371 real definition first, and we can just use the same value. */
7372 if (h->u.weakdef != NULL)
7373 {
7374 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7375 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7376 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7377 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7378 if (ELIMINATE_COPY_RELOCS)
7379 h->non_got_ref = h->u.weakdef->non_got_ref;
7380 return TRUE;
7381 }
7382
7383 /* If we are creating a shared library, we must presume that the
7384 only references to the symbol are via the global offset table.
7385 For such cases we need not do anything here; the relocations will
7386 be handled correctly by relocate_section. */
7387 if (bfd_link_pic (info))
7388 return TRUE;
7389
7390 /* If there are no references to this symbol that do not use the
7391 GOT, we don't need to generate a copy reloc. */
7392 if (!h->non_got_ref)
7393 return TRUE;
7394
7395 /* Don't generate a copy reloc for symbols defined in the executable. */
7396 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7397
7398 /* If -z nocopyreloc was given, don't generate them either. */
7399 || info->nocopyreloc
7400
7401 /* If we didn't find any dynamic relocs in read-only sections, then
7402 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7403 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7404
7405 /* Protected variables do not work with .dynbss. The copy in
7406 .dynbss won't be used by the shared library with the protected
7407 definition for the variable. Text relocations are preferable
7408 to an incorrect program. */
7409 || h->protected_def)
7410 {
7411 h->non_got_ref = 0;
7412 return TRUE;
7413 }
7414
7415 if (h->plt.plist != NULL)
7416 {
7417 /* We should never get here, but unfortunately there are versions
7418 of gcc out there that improperly (for this ABI) put initialized
7419 function pointers, vtable refs and suchlike in read-only
7420 sections. Allow them to proceed, but warn that this might
7421 break at runtime. */
7422 info->callbacks->einfo
7423 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7424 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7425 h->root.root.string);
7426 }
7427
7428 /* This is a reference to a symbol defined by a dynamic object which
7429 is not a function. */
7430
7431 /* We must allocate the symbol in our .dynbss section, which will
7432 become part of the .bss section of the executable. There will be
7433 an entry for this symbol in the .dynsym section. The dynamic
7434 object will contain position independent code, so all references
7435 from the dynamic object to this symbol will go through the global
7436 offset table. The dynamic linker will use the .dynsym entry to
7437 determine the address it must put in the global offset table, so
7438 both the dynamic object and the regular object will refer to the
7439 same memory location for the variable. */
7440
7441 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7442 to copy the initial value out of the dynamic object and into the
7443 runtime process image. We need to remember the offset into the
7444 .rela.bss section we are going to use. */
7445 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7446 {
7447 s = htab->elf.sdynrelro;
7448 srel = htab->elf.sreldynrelro;
7449 }
7450 else
7451 {
7452 s = htab->elf.sdynbss;
7453 srel = htab->elf.srelbss;
7454 }
7455 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7456 {
7457 srel->size += sizeof (Elf64_External_Rela);
7458 h->needs_copy = 1;
7459 }
7460
7461 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7462 }
7463
7464 /* If given a function descriptor symbol, hide both the function code
7465 sym and the descriptor. */
7466 static void
7467 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7468 struct elf_link_hash_entry *h,
7469 bfd_boolean force_local)
7470 {
7471 struct ppc_link_hash_entry *eh;
7472 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7473
7474 eh = (struct ppc_link_hash_entry *) h;
7475 if (eh->is_func_descriptor)
7476 {
7477 struct ppc_link_hash_entry *fh = eh->oh;
7478
7479 if (fh == NULL)
7480 {
7481 const char *p, *q;
7482 struct elf_link_hash_table *htab = elf_hash_table (info);
7483 char save;
7484
7485 /* We aren't supposed to use alloca in BFD because on
7486 systems which do not have alloca the version in libiberty
7487 calls xmalloc, which might cause the program to crash
7488 when it runs out of memory. This function doesn't have a
7489 return status, so there's no way to gracefully return an
7490 error. So cheat. We know that string[-1] can be safely
7491 accessed; It's either a string in an ELF string table,
7492 or allocated in an objalloc structure. */
7493
7494 p = eh->elf.root.root.string - 1;
7495 save = *p;
7496 *(char *) p = '.';
7497 fh = (struct ppc_link_hash_entry *)
7498 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7499 *(char *) p = save;
7500
7501 /* Unfortunately, if it so happens that the string we were
7502 looking for was allocated immediately before this string,
7503 then we overwrote the string terminator. That's the only
7504 reason the lookup should fail. */
7505 if (fh == NULL)
7506 {
7507 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7508 while (q >= eh->elf.root.root.string && *q == *p)
7509 --q, --p;
7510 if (q < eh->elf.root.root.string && *p == '.')
7511 fh = (struct ppc_link_hash_entry *)
7512 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7513 }
7514 if (fh != NULL)
7515 {
7516 eh->oh = fh;
7517 fh->oh = eh;
7518 }
7519 }
7520 if (fh != NULL)
7521 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7522 }
7523 }
7524
7525 static bfd_boolean
7526 get_sym_h (struct elf_link_hash_entry **hp,
7527 Elf_Internal_Sym **symp,
7528 asection **symsecp,
7529 unsigned char **tls_maskp,
7530 Elf_Internal_Sym **locsymsp,
7531 unsigned long r_symndx,
7532 bfd *ibfd)
7533 {
7534 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7535
7536 if (r_symndx >= symtab_hdr->sh_info)
7537 {
7538 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7539 struct elf_link_hash_entry *h;
7540
7541 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7542 h = elf_follow_link (h);
7543
7544 if (hp != NULL)
7545 *hp = h;
7546
7547 if (symp != NULL)
7548 *symp = NULL;
7549
7550 if (symsecp != NULL)
7551 {
7552 asection *symsec = NULL;
7553 if (h->root.type == bfd_link_hash_defined
7554 || h->root.type == bfd_link_hash_defweak)
7555 symsec = h->root.u.def.section;
7556 *symsecp = symsec;
7557 }
7558
7559 if (tls_maskp != NULL)
7560 {
7561 struct ppc_link_hash_entry *eh;
7562
7563 eh = (struct ppc_link_hash_entry *) h;
7564 *tls_maskp = &eh->tls_mask;
7565 }
7566 }
7567 else
7568 {
7569 Elf_Internal_Sym *sym;
7570 Elf_Internal_Sym *locsyms = *locsymsp;
7571
7572 if (locsyms == NULL)
7573 {
7574 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7575 if (locsyms == NULL)
7576 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7577 symtab_hdr->sh_info,
7578 0, NULL, NULL, NULL);
7579 if (locsyms == NULL)
7580 return FALSE;
7581 *locsymsp = locsyms;
7582 }
7583 sym = locsyms + r_symndx;
7584
7585 if (hp != NULL)
7586 *hp = NULL;
7587
7588 if (symp != NULL)
7589 *symp = sym;
7590
7591 if (symsecp != NULL)
7592 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7593
7594 if (tls_maskp != NULL)
7595 {
7596 struct got_entry **lgot_ents;
7597 unsigned char *tls_mask;
7598
7599 tls_mask = NULL;
7600 lgot_ents = elf_local_got_ents (ibfd);
7601 if (lgot_ents != NULL)
7602 {
7603 struct plt_entry **local_plt = (struct plt_entry **)
7604 (lgot_ents + symtab_hdr->sh_info);
7605 unsigned char *lgot_masks = (unsigned char *)
7606 (local_plt + symtab_hdr->sh_info);
7607 tls_mask = &lgot_masks[r_symndx];
7608 }
7609 *tls_maskp = tls_mask;
7610 }
7611 }
7612 return TRUE;
7613 }
7614
7615 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7616 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7617 type suitable for optimization, and 1 otherwise. */
7618
7619 static int
7620 get_tls_mask (unsigned char **tls_maskp,
7621 unsigned long *toc_symndx,
7622 bfd_vma *toc_addend,
7623 Elf_Internal_Sym **locsymsp,
7624 const Elf_Internal_Rela *rel,
7625 bfd *ibfd)
7626 {
7627 unsigned long r_symndx;
7628 int next_r;
7629 struct elf_link_hash_entry *h;
7630 Elf_Internal_Sym *sym;
7631 asection *sec;
7632 bfd_vma off;
7633
7634 r_symndx = ELF64_R_SYM (rel->r_info);
7635 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7636 return 0;
7637
7638 if ((*tls_maskp != NULL && **tls_maskp != 0)
7639 || sec == NULL
7640 || ppc64_elf_section_data (sec) == NULL
7641 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7642 return 1;
7643
7644 /* Look inside a TOC section too. */
7645 if (h != NULL)
7646 {
7647 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7648 off = h->root.u.def.value;
7649 }
7650 else
7651 off = sym->st_value;
7652 off += rel->r_addend;
7653 BFD_ASSERT (off % 8 == 0);
7654 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7655 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7656 if (toc_symndx != NULL)
7657 *toc_symndx = r_symndx;
7658 if (toc_addend != NULL)
7659 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7660 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7661 return 0;
7662 if ((h == NULL || is_static_defined (h))
7663 && (next_r == -1 || next_r == -2))
7664 return 1 - next_r;
7665 return 1;
7666 }
7667
7668 /* Find (or create) an entry in the tocsave hash table. */
7669
7670 static struct tocsave_entry *
7671 tocsave_find (struct ppc_link_hash_table *htab,
7672 enum insert_option insert,
7673 Elf_Internal_Sym **local_syms,
7674 const Elf_Internal_Rela *irela,
7675 bfd *ibfd)
7676 {
7677 unsigned long r_indx;
7678 struct elf_link_hash_entry *h;
7679 Elf_Internal_Sym *sym;
7680 struct tocsave_entry ent, *p;
7681 hashval_t hash;
7682 struct tocsave_entry **slot;
7683
7684 r_indx = ELF64_R_SYM (irela->r_info);
7685 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7686 return NULL;
7687 if (ent.sec == NULL || ent.sec->output_section == NULL)
7688 {
7689 _bfd_error_handler
7690 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7691 return NULL;
7692 }
7693
7694 if (h != NULL)
7695 ent.offset = h->root.u.def.value;
7696 else
7697 ent.offset = sym->st_value;
7698 ent.offset += irela->r_addend;
7699
7700 hash = tocsave_htab_hash (&ent);
7701 slot = ((struct tocsave_entry **)
7702 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7703 if (slot == NULL)
7704 return NULL;
7705
7706 if (*slot == NULL)
7707 {
7708 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7709 if (p == NULL)
7710 return NULL;
7711 *p = ent;
7712 *slot = p;
7713 }
7714 return *slot;
7715 }
7716
7717 /* Adjust all global syms defined in opd sections. In gcc generated
7718 code for the old ABI, these will already have been done. */
7719
7720 static bfd_boolean
7721 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7722 {
7723 struct ppc_link_hash_entry *eh;
7724 asection *sym_sec;
7725 struct _opd_sec_data *opd;
7726
7727 if (h->root.type == bfd_link_hash_indirect)
7728 return TRUE;
7729
7730 if (h->root.type != bfd_link_hash_defined
7731 && h->root.type != bfd_link_hash_defweak)
7732 return TRUE;
7733
7734 eh = (struct ppc_link_hash_entry *) h;
7735 if (eh->adjust_done)
7736 return TRUE;
7737
7738 sym_sec = eh->elf.root.u.def.section;
7739 opd = get_opd_info (sym_sec);
7740 if (opd != NULL && opd->adjust != NULL)
7741 {
7742 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7743 if (adjust == -1)
7744 {
7745 /* This entry has been deleted. */
7746 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7747 if (dsec == NULL)
7748 {
7749 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7750 if (discarded_section (dsec))
7751 {
7752 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7753 break;
7754 }
7755 }
7756 eh->elf.root.u.def.value = 0;
7757 eh->elf.root.u.def.section = dsec;
7758 }
7759 else
7760 eh->elf.root.u.def.value += adjust;
7761 eh->adjust_done = 1;
7762 }
7763 return TRUE;
7764 }
7765
7766 /* Handles decrementing dynamic reloc counts for the reloc specified by
7767 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7768 have already been determined. */
7769
7770 static bfd_boolean
7771 dec_dynrel_count (bfd_vma r_info,
7772 asection *sec,
7773 struct bfd_link_info *info,
7774 Elf_Internal_Sym **local_syms,
7775 struct elf_link_hash_entry *h,
7776 Elf_Internal_Sym *sym)
7777 {
7778 enum elf_ppc64_reloc_type r_type;
7779 asection *sym_sec = NULL;
7780
7781 /* Can this reloc be dynamic? This switch, and later tests here
7782 should be kept in sync with the code in check_relocs. */
7783 r_type = ELF64_R_TYPE (r_info);
7784 switch (r_type)
7785 {
7786 default:
7787 return TRUE;
7788
7789 case R_PPC64_TPREL16:
7790 case R_PPC64_TPREL16_LO:
7791 case R_PPC64_TPREL16_HI:
7792 case R_PPC64_TPREL16_HA:
7793 case R_PPC64_TPREL16_DS:
7794 case R_PPC64_TPREL16_LO_DS:
7795 case R_PPC64_TPREL16_HIGH:
7796 case R_PPC64_TPREL16_HIGHA:
7797 case R_PPC64_TPREL16_HIGHER:
7798 case R_PPC64_TPREL16_HIGHERA:
7799 case R_PPC64_TPREL16_HIGHEST:
7800 case R_PPC64_TPREL16_HIGHESTA:
7801 if (!bfd_link_pic (info))
7802 return TRUE;
7803
7804 case R_PPC64_TPREL64:
7805 case R_PPC64_DTPMOD64:
7806 case R_PPC64_DTPREL64:
7807 case R_PPC64_ADDR64:
7808 case R_PPC64_REL30:
7809 case R_PPC64_REL32:
7810 case R_PPC64_REL64:
7811 case R_PPC64_ADDR14:
7812 case R_PPC64_ADDR14_BRNTAKEN:
7813 case R_PPC64_ADDR14_BRTAKEN:
7814 case R_PPC64_ADDR16:
7815 case R_PPC64_ADDR16_DS:
7816 case R_PPC64_ADDR16_HA:
7817 case R_PPC64_ADDR16_HI:
7818 case R_PPC64_ADDR16_HIGH:
7819 case R_PPC64_ADDR16_HIGHA:
7820 case R_PPC64_ADDR16_HIGHER:
7821 case R_PPC64_ADDR16_HIGHERA:
7822 case R_PPC64_ADDR16_HIGHEST:
7823 case R_PPC64_ADDR16_HIGHESTA:
7824 case R_PPC64_ADDR16_LO:
7825 case R_PPC64_ADDR16_LO_DS:
7826 case R_PPC64_ADDR24:
7827 case R_PPC64_ADDR32:
7828 case R_PPC64_UADDR16:
7829 case R_PPC64_UADDR32:
7830 case R_PPC64_UADDR64:
7831 case R_PPC64_TOC:
7832 break;
7833 }
7834
7835 if (local_syms != NULL)
7836 {
7837 unsigned long r_symndx;
7838 bfd *ibfd = sec->owner;
7839
7840 r_symndx = ELF64_R_SYM (r_info);
7841 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7842 return FALSE;
7843 }
7844
7845 if ((bfd_link_pic (info)
7846 && (must_be_dyn_reloc (info, r_type)
7847 || (h != NULL
7848 && (!SYMBOLIC_BIND (info, h)
7849 || h->root.type == bfd_link_hash_defweak
7850 || !h->def_regular))))
7851 || (ELIMINATE_COPY_RELOCS
7852 && !bfd_link_pic (info)
7853 && h != NULL
7854 && (h->root.type == bfd_link_hash_defweak
7855 || !h->def_regular)))
7856 ;
7857 else
7858 return TRUE;
7859
7860 if (h != NULL)
7861 {
7862 struct elf_dyn_relocs *p;
7863 struct elf_dyn_relocs **pp;
7864 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7865
7866 /* elf_gc_sweep may have already removed all dyn relocs associated
7867 with local syms for a given section. Also, symbol flags are
7868 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7869 report a dynreloc miscount. */
7870 if (*pp == NULL && info->gc_sections)
7871 return TRUE;
7872
7873 while ((p = *pp) != NULL)
7874 {
7875 if (p->sec == sec)
7876 {
7877 if (!must_be_dyn_reloc (info, r_type))
7878 p->pc_count -= 1;
7879 p->count -= 1;
7880 if (p->count == 0)
7881 *pp = p->next;
7882 return TRUE;
7883 }
7884 pp = &p->next;
7885 }
7886 }
7887 else
7888 {
7889 struct ppc_dyn_relocs *p;
7890 struct ppc_dyn_relocs **pp;
7891 void *vpp;
7892 bfd_boolean is_ifunc;
7893
7894 if (local_syms == NULL)
7895 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7896 if (sym_sec == NULL)
7897 sym_sec = sec;
7898
7899 vpp = &elf_section_data (sym_sec)->local_dynrel;
7900 pp = (struct ppc_dyn_relocs **) vpp;
7901
7902 if (*pp == NULL && info->gc_sections)
7903 return TRUE;
7904
7905 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7906 while ((p = *pp) != NULL)
7907 {
7908 if (p->sec == sec && p->ifunc == is_ifunc)
7909 {
7910 p->count -= 1;
7911 if (p->count == 0)
7912 *pp = p->next;
7913 return TRUE;
7914 }
7915 pp = &p->next;
7916 }
7917 }
7918
7919 /* xgettext:c-format */
7920 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7921 sec->owner, sec);
7922 bfd_set_error (bfd_error_bad_value);
7923 return FALSE;
7924 }
7925
7926 /* Remove unused Official Procedure Descriptor entries. Currently we
7927 only remove those associated with functions in discarded link-once
7928 sections, or weakly defined functions that have been overridden. It
7929 would be possible to remove many more entries for statically linked
7930 applications. */
7931
7932 bfd_boolean
7933 ppc64_elf_edit_opd (struct bfd_link_info *info)
7934 {
7935 bfd *ibfd;
7936 bfd_boolean some_edited = FALSE;
7937 asection *need_pad = NULL;
7938 struct ppc_link_hash_table *htab;
7939
7940 htab = ppc_hash_table (info);
7941 if (htab == NULL)
7942 return FALSE;
7943
7944 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7945 {
7946 asection *sec;
7947 Elf_Internal_Rela *relstart, *rel, *relend;
7948 Elf_Internal_Shdr *symtab_hdr;
7949 Elf_Internal_Sym *local_syms;
7950 struct _opd_sec_data *opd;
7951 bfd_boolean need_edit, add_aux_fields, broken;
7952 bfd_size_type cnt_16b = 0;
7953
7954 if (!is_ppc64_elf (ibfd))
7955 continue;
7956
7957 sec = bfd_get_section_by_name (ibfd, ".opd");
7958 if (sec == NULL || sec->size == 0)
7959 continue;
7960
7961 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7962 continue;
7963
7964 if (sec->output_section == bfd_abs_section_ptr)
7965 continue;
7966
7967 /* Look through the section relocs. */
7968 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7969 continue;
7970
7971 local_syms = NULL;
7972 symtab_hdr = &elf_symtab_hdr (ibfd);
7973
7974 /* Read the relocations. */
7975 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7976 info->keep_memory);
7977 if (relstart == NULL)
7978 return FALSE;
7979
7980 /* First run through the relocs to check they are sane, and to
7981 determine whether we need to edit this opd section. */
7982 need_edit = FALSE;
7983 broken = FALSE;
7984 need_pad = sec;
7985 relend = relstart + sec->reloc_count;
7986 for (rel = relstart; rel < relend; )
7987 {
7988 enum elf_ppc64_reloc_type r_type;
7989 unsigned long r_symndx;
7990 asection *sym_sec;
7991 struct elf_link_hash_entry *h;
7992 Elf_Internal_Sym *sym;
7993 bfd_vma offset;
7994
7995 /* .opd contains an array of 16 or 24 byte entries. We're
7996 only interested in the reloc pointing to a function entry
7997 point. */
7998 offset = rel->r_offset;
7999 if (rel + 1 == relend
8000 || rel[1].r_offset != offset + 8)
8001 {
8002 /* If someone messes with .opd alignment then after a
8003 "ld -r" we might have padding in the middle of .opd.
8004 Also, there's nothing to prevent someone putting
8005 something silly in .opd with the assembler. No .opd
8006 optimization for them! */
8007 broken_opd:
8008 _bfd_error_handler
8009 (_("%B: .opd is not a regular array of opd entries"), ibfd);
8010 broken = TRUE;
8011 break;
8012 }
8013
8014 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
8015 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
8016 {
8017 _bfd_error_handler
8018 /* xgettext:c-format */
8019 (_("%B: unexpected reloc type %u in .opd section"),
8020 ibfd, r_type);
8021 broken = TRUE;
8022 break;
8023 }
8024
8025 r_symndx = ELF64_R_SYM (rel->r_info);
8026 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8027 r_symndx, ibfd))
8028 goto error_ret;
8029
8030 if (sym_sec == NULL || sym_sec->owner == NULL)
8031 {
8032 const char *sym_name;
8033 if (h != NULL)
8034 sym_name = h->root.root.string;
8035 else
8036 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8037 sym_sec);
8038
8039 _bfd_error_handler
8040 /* xgettext:c-format */
8041 (_("%B: undefined sym `%s' in .opd section"),
8042 ibfd, sym_name);
8043 broken = TRUE;
8044 break;
8045 }
8046
8047 /* opd entries are always for functions defined in the
8048 current input bfd. If the symbol isn't defined in the
8049 input bfd, then we won't be using the function in this
8050 bfd; It must be defined in a linkonce section in another
8051 bfd, or is weak. It's also possible that we are
8052 discarding the function due to a linker script /DISCARD/,
8053 which we test for via the output_section. */
8054 if (sym_sec->owner != ibfd
8055 || sym_sec->output_section == bfd_abs_section_ptr)
8056 need_edit = TRUE;
8057
8058 rel += 2;
8059 if (rel + 1 == relend
8060 || (rel + 2 < relend
8061 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8062 ++rel;
8063
8064 if (rel == relend)
8065 {
8066 if (sec->size == offset + 24)
8067 {
8068 need_pad = NULL;
8069 break;
8070 }
8071 if (sec->size == offset + 16)
8072 {
8073 cnt_16b++;
8074 break;
8075 }
8076 goto broken_opd;
8077 }
8078 else if (rel + 1 < relend
8079 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8080 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8081 {
8082 if (rel[0].r_offset == offset + 16)
8083 cnt_16b++;
8084 else if (rel[0].r_offset != offset + 24)
8085 goto broken_opd;
8086 }
8087 else
8088 goto broken_opd;
8089 }
8090
8091 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8092
8093 if (!broken && (need_edit || add_aux_fields))
8094 {
8095 Elf_Internal_Rela *write_rel;
8096 Elf_Internal_Shdr *rel_hdr;
8097 bfd_byte *rptr, *wptr;
8098 bfd_byte *new_contents;
8099 bfd_size_type amt;
8100
8101 new_contents = NULL;
8102 amt = OPD_NDX (sec->size) * sizeof (long);
8103 opd = &ppc64_elf_section_data (sec)->u.opd;
8104 opd->adjust = bfd_zalloc (sec->owner, amt);
8105 if (opd->adjust == NULL)
8106 return FALSE;
8107 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8108
8109 /* This seems a waste of time as input .opd sections are all
8110 zeros as generated by gcc, but I suppose there's no reason
8111 this will always be so. We might start putting something in
8112 the third word of .opd entries. */
8113 if ((sec->flags & SEC_IN_MEMORY) == 0)
8114 {
8115 bfd_byte *loc;
8116 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8117 {
8118 if (loc != NULL)
8119 free (loc);
8120 error_ret:
8121 if (local_syms != NULL
8122 && symtab_hdr->contents != (unsigned char *) local_syms)
8123 free (local_syms);
8124 if (elf_section_data (sec)->relocs != relstart)
8125 free (relstart);
8126 return FALSE;
8127 }
8128 sec->contents = loc;
8129 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8130 }
8131
8132 elf_section_data (sec)->relocs = relstart;
8133
8134 new_contents = sec->contents;
8135 if (add_aux_fields)
8136 {
8137 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8138 if (new_contents == NULL)
8139 return FALSE;
8140 need_pad = NULL;
8141 }
8142 wptr = new_contents;
8143 rptr = sec->contents;
8144 write_rel = relstart;
8145 for (rel = relstart; rel < relend; )
8146 {
8147 unsigned long r_symndx;
8148 asection *sym_sec;
8149 struct elf_link_hash_entry *h;
8150 struct ppc_link_hash_entry *fdh = NULL;
8151 Elf_Internal_Sym *sym;
8152 long opd_ent_size;
8153 Elf_Internal_Rela *next_rel;
8154 bfd_boolean skip;
8155
8156 r_symndx = ELF64_R_SYM (rel->r_info);
8157 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8158 r_symndx, ibfd))
8159 goto error_ret;
8160
8161 next_rel = rel + 2;
8162 if (next_rel + 1 == relend
8163 || (next_rel + 2 < relend
8164 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8165 ++next_rel;
8166
8167 /* See if the .opd entry is full 24 byte or
8168 16 byte (with fd_aux entry overlapped with next
8169 fd_func). */
8170 opd_ent_size = 24;
8171 if (next_rel == relend)
8172 {
8173 if (sec->size == rel->r_offset + 16)
8174 opd_ent_size = 16;
8175 }
8176 else if (next_rel->r_offset == rel->r_offset + 16)
8177 opd_ent_size = 16;
8178
8179 if (h != NULL
8180 && h->root.root.string[0] == '.')
8181 {
8182 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8183 if (fdh != NULL)
8184 {
8185 fdh = ppc_follow_link (fdh);
8186 if (fdh->elf.root.type != bfd_link_hash_defined
8187 && fdh->elf.root.type != bfd_link_hash_defweak)
8188 fdh = NULL;
8189 }
8190 }
8191
8192 skip = (sym_sec->owner != ibfd
8193 || sym_sec->output_section == bfd_abs_section_ptr);
8194 if (skip)
8195 {
8196 if (fdh != NULL && sym_sec->owner == ibfd)
8197 {
8198 /* Arrange for the function descriptor sym
8199 to be dropped. */
8200 fdh->elf.root.u.def.value = 0;
8201 fdh->elf.root.u.def.section = sym_sec;
8202 }
8203 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8204
8205 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8206 rel = next_rel;
8207 else
8208 while (1)
8209 {
8210 if (!dec_dynrel_count (rel->r_info, sec, info,
8211 NULL, h, sym))
8212 goto error_ret;
8213
8214 if (++rel == next_rel)
8215 break;
8216
8217 r_symndx = ELF64_R_SYM (rel->r_info);
8218 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8219 r_symndx, ibfd))
8220 goto error_ret;
8221 }
8222 }
8223 else
8224 {
8225 /* We'll be keeping this opd entry. */
8226 long adjust;
8227
8228 if (fdh != NULL)
8229 {
8230 /* Redefine the function descriptor symbol to
8231 this location in the opd section. It is
8232 necessary to update the value here rather
8233 than using an array of adjustments as we do
8234 for local symbols, because various places
8235 in the generic ELF code use the value
8236 stored in u.def.value. */
8237 fdh->elf.root.u.def.value = wptr - new_contents;
8238 fdh->adjust_done = 1;
8239 }
8240
8241 /* Local syms are a bit tricky. We could
8242 tweak them as they can be cached, but
8243 we'd need to look through the local syms
8244 for the function descriptor sym which we
8245 don't have at the moment. So keep an
8246 array of adjustments. */
8247 adjust = (wptr - new_contents) - (rptr - sec->contents);
8248 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8249
8250 if (wptr != rptr)
8251 memcpy (wptr, rptr, opd_ent_size);
8252 wptr += opd_ent_size;
8253 if (add_aux_fields && opd_ent_size == 16)
8254 {
8255 memset (wptr, '\0', 8);
8256 wptr += 8;
8257 }
8258
8259 /* We need to adjust any reloc offsets to point to the
8260 new opd entries. */
8261 for ( ; rel != next_rel; ++rel)
8262 {
8263 rel->r_offset += adjust;
8264 if (write_rel != rel)
8265 memcpy (write_rel, rel, sizeof (*rel));
8266 ++write_rel;
8267 }
8268 }
8269
8270 rptr += opd_ent_size;
8271 }
8272
8273 sec->size = wptr - new_contents;
8274 sec->reloc_count = write_rel - relstart;
8275 if (add_aux_fields)
8276 {
8277 free (sec->contents);
8278 sec->contents = new_contents;
8279 }
8280
8281 /* Fudge the header size too, as this is used later in
8282 elf_bfd_final_link if we are emitting relocs. */
8283 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8284 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8285 some_edited = TRUE;
8286 }
8287 else if (elf_section_data (sec)->relocs != relstart)
8288 free (relstart);
8289
8290 if (local_syms != NULL
8291 && symtab_hdr->contents != (unsigned char *) local_syms)
8292 {
8293 if (!info->keep_memory)
8294 free (local_syms);
8295 else
8296 symtab_hdr->contents = (unsigned char *) local_syms;
8297 }
8298 }
8299
8300 if (some_edited)
8301 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8302
8303 /* If we are doing a final link and the last .opd entry is just 16 byte
8304 long, add a 8 byte padding after it. */
8305 if (need_pad != NULL && !bfd_link_relocatable (info))
8306 {
8307 bfd_byte *p;
8308
8309 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8310 {
8311 BFD_ASSERT (need_pad->size > 0);
8312
8313 p = bfd_malloc (need_pad->size + 8);
8314 if (p == NULL)
8315 return FALSE;
8316
8317 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8318 p, 0, need_pad->size))
8319 return FALSE;
8320
8321 need_pad->contents = p;
8322 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8323 }
8324 else
8325 {
8326 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8327 if (p == NULL)
8328 return FALSE;
8329
8330 need_pad->contents = p;
8331 }
8332
8333 memset (need_pad->contents + need_pad->size, 0, 8);
8334 need_pad->size += 8;
8335 }
8336
8337 return TRUE;
8338 }
8339
8340 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8341
8342 asection *
8343 ppc64_elf_tls_setup (struct bfd_link_info *info)
8344 {
8345 struct ppc_link_hash_table *htab;
8346
8347 htab = ppc_hash_table (info);
8348 if (htab == NULL)
8349 return NULL;
8350
8351 if (abiversion (info->output_bfd) == 1)
8352 htab->opd_abi = 1;
8353
8354 if (htab->params->no_multi_toc)
8355 htab->do_multi_toc = 0;
8356 else if (!htab->do_multi_toc)
8357 htab->params->no_multi_toc = 1;
8358
8359 /* Default to --no-plt-localentry, as this option can cause problems
8360 with symbol interposition. For example, glibc libpthread.so and
8361 libc.so duplicate many pthread symbols, with a fallback
8362 implementation in libc.so. In some cases the fallback does more
8363 work than the pthread implementation. __pthread_condattr_destroy
8364 is one such symbol: the libpthread.so implementation is
8365 localentry:0 while the libc.so implementation is localentry:8.
8366 An app that "cleverly" uses dlopen to only load necessary
8367 libraries at runtime may omit loading libpthread.so when not
8368 running multi-threaded, which then results in the libc.so
8369 fallback symbols being used and ld.so complaining. Now there
8370 are workarounds in ld (see non_zero_localentry) to detect the
8371 pthread situation, but that may not be the only case where
8372 --plt-localentry can cause trouble. */
8373 if (htab->params->plt_localentry0 < 0)
8374 htab->params->plt_localentry0 = 0;
8375
8376 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8377 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8378 FALSE, FALSE, TRUE));
8379 /* Move dynamic linking info to the function descriptor sym. */
8380 if (htab->tls_get_addr != NULL)
8381 func_desc_adjust (&htab->tls_get_addr->elf, info);
8382 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8383 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8384 FALSE, FALSE, TRUE));
8385 if (htab->params->tls_get_addr_opt)
8386 {
8387 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8388
8389 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8390 FALSE, FALSE, TRUE);
8391 if (opt != NULL)
8392 func_desc_adjust (opt, info);
8393 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8394 FALSE, FALSE, TRUE);
8395 if (opt_fd != NULL
8396 && (opt_fd->root.type == bfd_link_hash_defined
8397 || opt_fd->root.type == bfd_link_hash_defweak))
8398 {
8399 /* If glibc supports an optimized __tls_get_addr call stub,
8400 signalled by the presence of __tls_get_addr_opt, and we'll
8401 be calling __tls_get_addr via a plt call stub, then
8402 make __tls_get_addr point to __tls_get_addr_opt. */
8403 tga_fd = &htab->tls_get_addr_fd->elf;
8404 if (htab->elf.dynamic_sections_created
8405 && tga_fd != NULL
8406 && (tga_fd->type == STT_FUNC
8407 || tga_fd->needs_plt)
8408 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8409 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8410 {
8411 struct plt_entry *ent;
8412
8413 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8414 if (ent->plt.refcount > 0)
8415 break;
8416 if (ent != NULL)
8417 {
8418 tga_fd->root.type = bfd_link_hash_indirect;
8419 tga_fd->root.u.i.link = &opt_fd->root;
8420 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8421 opt_fd->mark = 1;
8422 if (opt_fd->dynindx != -1)
8423 {
8424 /* Use __tls_get_addr_opt in dynamic relocations. */
8425 opt_fd->dynindx = -1;
8426 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8427 opt_fd->dynstr_index);
8428 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8429 return NULL;
8430 }
8431 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8432 tga = &htab->tls_get_addr->elf;
8433 if (opt != NULL && tga != NULL)
8434 {
8435 tga->root.type = bfd_link_hash_indirect;
8436 tga->root.u.i.link = &opt->root;
8437 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8438 opt->mark = 1;
8439 _bfd_elf_link_hash_hide_symbol (info, opt,
8440 tga->forced_local);
8441 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8442 }
8443 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8444 htab->tls_get_addr_fd->is_func_descriptor = 1;
8445 if (htab->tls_get_addr != NULL)
8446 {
8447 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8448 htab->tls_get_addr->is_func = 1;
8449 }
8450 }
8451 }
8452 }
8453 else if (htab->params->tls_get_addr_opt < 0)
8454 htab->params->tls_get_addr_opt = 0;
8455 }
8456 return _bfd_elf_tls_setup (info->output_bfd, info);
8457 }
8458
8459 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8460 HASH1 or HASH2. */
8461
8462 static bfd_boolean
8463 branch_reloc_hash_match (const bfd *ibfd,
8464 const Elf_Internal_Rela *rel,
8465 const struct ppc_link_hash_entry *hash1,
8466 const struct ppc_link_hash_entry *hash2)
8467 {
8468 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8469 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8470 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8471
8472 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8473 {
8474 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8475 struct elf_link_hash_entry *h;
8476
8477 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8478 h = elf_follow_link (h);
8479 if (h == &hash1->elf || h == &hash2->elf)
8480 return TRUE;
8481 }
8482 return FALSE;
8483 }
8484
8485 /* Run through all the TLS relocs looking for optimization
8486 opportunities. The linker has been hacked (see ppc64elf.em) to do
8487 a preliminary section layout so that we know the TLS segment
8488 offsets. We can't optimize earlier because some optimizations need
8489 to know the tp offset, and we need to optimize before allocating
8490 dynamic relocations. */
8491
8492 bfd_boolean
8493 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8494 {
8495 bfd *ibfd;
8496 asection *sec;
8497 struct ppc_link_hash_table *htab;
8498 unsigned char *toc_ref;
8499 int pass;
8500
8501 if (!bfd_link_executable (info))
8502 return TRUE;
8503
8504 htab = ppc_hash_table (info);
8505 if (htab == NULL)
8506 return FALSE;
8507
8508 /* Make two passes over the relocs. On the first pass, mark toc
8509 entries involved with tls relocs, and check that tls relocs
8510 involved in setting up a tls_get_addr call are indeed followed by
8511 such a call. If they are not, we can't do any tls optimization.
8512 On the second pass twiddle tls_mask flags to notify
8513 relocate_section that optimization can be done, and adjust got
8514 and plt refcounts. */
8515 toc_ref = NULL;
8516 for (pass = 0; pass < 2; ++pass)
8517 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8518 {
8519 Elf_Internal_Sym *locsyms = NULL;
8520 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8521
8522 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8523 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8524 {
8525 Elf_Internal_Rela *relstart, *rel, *relend;
8526 bfd_boolean found_tls_get_addr_arg = 0;
8527
8528 /* Read the relocations. */
8529 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8530 info->keep_memory);
8531 if (relstart == NULL)
8532 {
8533 free (toc_ref);
8534 return FALSE;
8535 }
8536
8537 relend = relstart + sec->reloc_count;
8538 for (rel = relstart; rel < relend; rel++)
8539 {
8540 enum elf_ppc64_reloc_type r_type;
8541 unsigned long r_symndx;
8542 struct elf_link_hash_entry *h;
8543 Elf_Internal_Sym *sym;
8544 asection *sym_sec;
8545 unsigned char *tls_mask;
8546 unsigned char tls_set, tls_clear, tls_type = 0;
8547 bfd_vma value;
8548 bfd_boolean ok_tprel, is_local;
8549 long toc_ref_index = 0;
8550 int expecting_tls_get_addr = 0;
8551 bfd_boolean ret = FALSE;
8552
8553 r_symndx = ELF64_R_SYM (rel->r_info);
8554 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8555 r_symndx, ibfd))
8556 {
8557 err_free_rel:
8558 if (elf_section_data (sec)->relocs != relstart)
8559 free (relstart);
8560 if (toc_ref != NULL)
8561 free (toc_ref);
8562 if (locsyms != NULL
8563 && (elf_symtab_hdr (ibfd).contents
8564 != (unsigned char *) locsyms))
8565 free (locsyms);
8566 return ret;
8567 }
8568
8569 if (h != NULL)
8570 {
8571 if (h->root.type == bfd_link_hash_defined
8572 || h->root.type == bfd_link_hash_defweak)
8573 value = h->root.u.def.value;
8574 else if (h->root.type == bfd_link_hash_undefweak)
8575 value = 0;
8576 else
8577 {
8578 found_tls_get_addr_arg = 0;
8579 continue;
8580 }
8581 }
8582 else
8583 /* Symbols referenced by TLS relocs must be of type
8584 STT_TLS. So no need for .opd local sym adjust. */
8585 value = sym->st_value;
8586
8587 ok_tprel = FALSE;
8588 is_local = FALSE;
8589 if (h == NULL
8590 || !h->def_dynamic)
8591 {
8592 is_local = TRUE;
8593 if (h != NULL
8594 && h->root.type == bfd_link_hash_undefweak)
8595 ok_tprel = TRUE;
8596 else if (sym_sec != NULL
8597 && sym_sec->output_section != NULL)
8598 {
8599 value += sym_sec->output_offset;
8600 value += sym_sec->output_section->vma;
8601 value -= htab->elf.tls_sec->vma;
8602 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8603 < (bfd_vma) 1 << 32);
8604 }
8605 }
8606
8607 r_type = ELF64_R_TYPE (rel->r_info);
8608 /* If this section has old-style __tls_get_addr calls
8609 without marker relocs, then check that each
8610 __tls_get_addr call reloc is preceded by a reloc
8611 that conceivably belongs to the __tls_get_addr arg
8612 setup insn. If we don't find matching arg setup
8613 relocs, don't do any tls optimization. */
8614 if (pass == 0
8615 && sec->has_tls_get_addr_call
8616 && h != NULL
8617 && (h == &htab->tls_get_addr->elf
8618 || h == &htab->tls_get_addr_fd->elf)
8619 && !found_tls_get_addr_arg
8620 && is_branch_reloc (r_type))
8621 {
8622 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8623 "TLS optimization disabled\n"),
8624 ibfd, sec, rel->r_offset);
8625 ret = TRUE;
8626 goto err_free_rel;
8627 }
8628
8629 found_tls_get_addr_arg = 0;
8630 switch (r_type)
8631 {
8632 case R_PPC64_GOT_TLSLD16:
8633 case R_PPC64_GOT_TLSLD16_LO:
8634 expecting_tls_get_addr = 1;
8635 found_tls_get_addr_arg = 1;
8636 /* Fall through. */
8637
8638 case R_PPC64_GOT_TLSLD16_HI:
8639 case R_PPC64_GOT_TLSLD16_HA:
8640 /* These relocs should never be against a symbol
8641 defined in a shared lib. Leave them alone if
8642 that turns out to be the case. */
8643 if (!is_local)
8644 continue;
8645
8646 /* LD -> LE */
8647 tls_set = 0;
8648 tls_clear = TLS_LD;
8649 tls_type = TLS_TLS | TLS_LD;
8650 break;
8651
8652 case R_PPC64_GOT_TLSGD16:
8653 case R_PPC64_GOT_TLSGD16_LO:
8654 expecting_tls_get_addr = 1;
8655 found_tls_get_addr_arg = 1;
8656 /* Fall through. */
8657
8658 case R_PPC64_GOT_TLSGD16_HI:
8659 case R_PPC64_GOT_TLSGD16_HA:
8660 if (ok_tprel)
8661 /* GD -> LE */
8662 tls_set = 0;
8663 else
8664 /* GD -> IE */
8665 tls_set = TLS_TLS | TLS_TPRELGD;
8666 tls_clear = TLS_GD;
8667 tls_type = TLS_TLS | TLS_GD;
8668 break;
8669
8670 case R_PPC64_GOT_TPREL16_DS:
8671 case R_PPC64_GOT_TPREL16_LO_DS:
8672 case R_PPC64_GOT_TPREL16_HI:
8673 case R_PPC64_GOT_TPREL16_HA:
8674 if (ok_tprel)
8675 {
8676 /* IE -> LE */
8677 tls_set = 0;
8678 tls_clear = TLS_TPREL;
8679 tls_type = TLS_TLS | TLS_TPREL;
8680 break;
8681 }
8682 continue;
8683
8684 case R_PPC64_TLSGD:
8685 case R_PPC64_TLSLD:
8686 found_tls_get_addr_arg = 1;
8687 /* Fall through. */
8688
8689 case R_PPC64_TLS:
8690 case R_PPC64_TOC16:
8691 case R_PPC64_TOC16_LO:
8692 if (sym_sec == NULL || sym_sec != toc)
8693 continue;
8694
8695 /* Mark this toc entry as referenced by a TLS
8696 code sequence. We can do that now in the
8697 case of R_PPC64_TLS, and after checking for
8698 tls_get_addr for the TOC16 relocs. */
8699 if (toc_ref == NULL)
8700 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8701 if (toc_ref == NULL)
8702 goto err_free_rel;
8703
8704 if (h != NULL)
8705 value = h->root.u.def.value;
8706 else
8707 value = sym->st_value;
8708 value += rel->r_addend;
8709 if (value % 8 != 0)
8710 continue;
8711 BFD_ASSERT (value < toc->size
8712 && toc->output_offset % 8 == 0);
8713 toc_ref_index = (value + toc->output_offset) / 8;
8714 if (r_type == R_PPC64_TLS
8715 || r_type == R_PPC64_TLSGD
8716 || r_type == R_PPC64_TLSLD)
8717 {
8718 toc_ref[toc_ref_index] = 1;
8719 continue;
8720 }
8721
8722 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8723 continue;
8724
8725 tls_set = 0;
8726 tls_clear = 0;
8727 expecting_tls_get_addr = 2;
8728 break;
8729
8730 case R_PPC64_TPREL64:
8731 if (pass == 0
8732 || sec != toc
8733 || toc_ref == NULL
8734 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8735 continue;
8736 if (ok_tprel)
8737 {
8738 /* IE -> LE */
8739 tls_set = TLS_EXPLICIT;
8740 tls_clear = TLS_TPREL;
8741 break;
8742 }
8743 continue;
8744
8745 case R_PPC64_DTPMOD64:
8746 if (pass == 0
8747 || sec != toc
8748 || toc_ref == NULL
8749 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8750 continue;
8751 if (rel + 1 < relend
8752 && (rel[1].r_info
8753 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8754 && rel[1].r_offset == rel->r_offset + 8)
8755 {
8756 if (ok_tprel)
8757 /* GD -> LE */
8758 tls_set = TLS_EXPLICIT | TLS_GD;
8759 else
8760 /* GD -> IE */
8761 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8762 tls_clear = TLS_GD;
8763 }
8764 else
8765 {
8766 if (!is_local)
8767 continue;
8768
8769 /* LD -> LE */
8770 tls_set = TLS_EXPLICIT;
8771 tls_clear = TLS_LD;
8772 }
8773 break;
8774
8775 default:
8776 continue;
8777 }
8778
8779 if (pass == 0)
8780 {
8781 if (!expecting_tls_get_addr
8782 || !sec->has_tls_get_addr_call)
8783 continue;
8784
8785 if (rel + 1 < relend
8786 && branch_reloc_hash_match (ibfd, rel + 1,
8787 htab->tls_get_addr,
8788 htab->tls_get_addr_fd))
8789 {
8790 if (expecting_tls_get_addr == 2)
8791 {
8792 /* Check for toc tls entries. */
8793 unsigned char *toc_tls;
8794 int retval;
8795
8796 retval = get_tls_mask (&toc_tls, NULL, NULL,
8797 &locsyms,
8798 rel, ibfd);
8799 if (retval == 0)
8800 goto err_free_rel;
8801 if (toc_tls != NULL)
8802 {
8803 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8804 found_tls_get_addr_arg = 1;
8805 if (retval > 1)
8806 toc_ref[toc_ref_index] = 1;
8807 }
8808 }
8809 continue;
8810 }
8811
8812 if (expecting_tls_get_addr != 1)
8813 continue;
8814
8815 /* Uh oh, we didn't find the expected call. We
8816 could just mark this symbol to exclude it
8817 from tls optimization but it's safer to skip
8818 the entire optimization. */
8819 /* xgettext:c-format */
8820 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8821 "TLS optimization disabled\n"),
8822 ibfd, sec, rel->r_offset);
8823 ret = TRUE;
8824 goto err_free_rel;
8825 }
8826
8827 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8828 {
8829 struct plt_entry *ent;
8830 for (ent = htab->tls_get_addr->elf.plt.plist;
8831 ent != NULL;
8832 ent = ent->next)
8833 if (ent->addend == 0)
8834 {
8835 if (ent->plt.refcount > 0)
8836 {
8837 ent->plt.refcount -= 1;
8838 expecting_tls_get_addr = 0;
8839 }
8840 break;
8841 }
8842 }
8843
8844 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8845 {
8846 struct plt_entry *ent;
8847 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8848 ent != NULL;
8849 ent = ent->next)
8850 if (ent->addend == 0)
8851 {
8852 if (ent->plt.refcount > 0)
8853 ent->plt.refcount -= 1;
8854 break;
8855 }
8856 }
8857
8858 if (tls_clear == 0)
8859 continue;
8860
8861 if ((tls_set & TLS_EXPLICIT) == 0)
8862 {
8863 struct got_entry *ent;
8864
8865 /* Adjust got entry for this reloc. */
8866 if (h != NULL)
8867 ent = h->got.glist;
8868 else
8869 ent = elf_local_got_ents (ibfd)[r_symndx];
8870
8871 for (; ent != NULL; ent = ent->next)
8872 if (ent->addend == rel->r_addend
8873 && ent->owner == ibfd
8874 && ent->tls_type == tls_type)
8875 break;
8876 if (ent == NULL)
8877 abort ();
8878
8879 if (tls_set == 0)
8880 {
8881 /* We managed to get rid of a got entry. */
8882 if (ent->got.refcount > 0)
8883 ent->got.refcount -= 1;
8884 }
8885 }
8886 else
8887 {
8888 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8889 we'll lose one or two dyn relocs. */
8890 if (!dec_dynrel_count (rel->r_info, sec, info,
8891 NULL, h, sym))
8892 return FALSE;
8893
8894 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8895 {
8896 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8897 NULL, h, sym))
8898 return FALSE;
8899 }
8900 }
8901
8902 *tls_mask |= tls_set;
8903 *tls_mask &= ~tls_clear;
8904 }
8905
8906 if (elf_section_data (sec)->relocs != relstart)
8907 free (relstart);
8908 }
8909
8910 if (locsyms != NULL
8911 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8912 {
8913 if (!info->keep_memory)
8914 free (locsyms);
8915 else
8916 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8917 }
8918 }
8919
8920 if (toc_ref != NULL)
8921 free (toc_ref);
8922 return TRUE;
8923 }
8924
8925 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8926 the values of any global symbols in a toc section that has been
8927 edited. Globals in toc sections should be a rarity, so this function
8928 sets a flag if any are found in toc sections other than the one just
8929 edited, so that further hash table traversals can be avoided. */
8930
8931 struct adjust_toc_info
8932 {
8933 asection *toc;
8934 unsigned long *skip;
8935 bfd_boolean global_toc_syms;
8936 };
8937
8938 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8939
8940 static bfd_boolean
8941 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8942 {
8943 struct ppc_link_hash_entry *eh;
8944 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8945 unsigned long i;
8946
8947 if (h->root.type != bfd_link_hash_defined
8948 && h->root.type != bfd_link_hash_defweak)
8949 return TRUE;
8950
8951 eh = (struct ppc_link_hash_entry *) h;
8952 if (eh->adjust_done)
8953 return TRUE;
8954
8955 if (eh->elf.root.u.def.section == toc_inf->toc)
8956 {
8957 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8958 i = toc_inf->toc->rawsize >> 3;
8959 else
8960 i = eh->elf.root.u.def.value >> 3;
8961
8962 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8963 {
8964 _bfd_error_handler
8965 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8966 do
8967 ++i;
8968 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8969 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8970 }
8971
8972 eh->elf.root.u.def.value -= toc_inf->skip[i];
8973 eh->adjust_done = 1;
8974 }
8975 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8976 toc_inf->global_toc_syms = TRUE;
8977
8978 return TRUE;
8979 }
8980
8981 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8982 on a _LO variety toc/got reloc. */
8983
8984 static bfd_boolean
8985 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8986 {
8987 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8988 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8989 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8990 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8991 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8992 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8993 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8994 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8995 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8996 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8997 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8998 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8999 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
9000 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
9001 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
9002 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
9003 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
9004 /* Exclude lfqu by testing reloc. If relocs are ever
9005 defined for the reduced D field in psq_lu then those
9006 will need testing too. */
9007 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9008 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
9009 && (insn & 1) == 0)
9010 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
9011 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
9012 /* Exclude stfqu. psq_stu as above for psq_lu. */
9013 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9014 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
9015 && (insn & 1) == 0));
9016 }
9017
9018 /* Examine all relocs referencing .toc sections in order to remove
9019 unused .toc entries. */
9020
9021 bfd_boolean
9022 ppc64_elf_edit_toc (struct bfd_link_info *info)
9023 {
9024 bfd *ibfd;
9025 struct adjust_toc_info toc_inf;
9026 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9027
9028 htab->do_toc_opt = 1;
9029 toc_inf.global_toc_syms = TRUE;
9030 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9031 {
9032 asection *toc, *sec;
9033 Elf_Internal_Shdr *symtab_hdr;
9034 Elf_Internal_Sym *local_syms;
9035 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9036 unsigned long *skip, *drop;
9037 unsigned char *used;
9038 unsigned char *keep, last, some_unused;
9039
9040 if (!is_ppc64_elf (ibfd))
9041 continue;
9042
9043 toc = bfd_get_section_by_name (ibfd, ".toc");
9044 if (toc == NULL
9045 || toc->size == 0
9046 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9047 || discarded_section (toc))
9048 continue;
9049
9050 toc_relocs = NULL;
9051 local_syms = NULL;
9052 symtab_hdr = &elf_symtab_hdr (ibfd);
9053
9054 /* Look at sections dropped from the final link. */
9055 skip = NULL;
9056 relstart = NULL;
9057 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9058 {
9059 if (sec->reloc_count == 0
9060 || !discarded_section (sec)
9061 || get_opd_info (sec)
9062 || (sec->flags & SEC_ALLOC) == 0
9063 || (sec->flags & SEC_DEBUGGING) != 0)
9064 continue;
9065
9066 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9067 if (relstart == NULL)
9068 goto error_ret;
9069
9070 /* Run through the relocs to see which toc entries might be
9071 unused. */
9072 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9073 {
9074 enum elf_ppc64_reloc_type r_type;
9075 unsigned long r_symndx;
9076 asection *sym_sec;
9077 struct elf_link_hash_entry *h;
9078 Elf_Internal_Sym *sym;
9079 bfd_vma val;
9080
9081 r_type = ELF64_R_TYPE (rel->r_info);
9082 switch (r_type)
9083 {
9084 default:
9085 continue;
9086
9087 case R_PPC64_TOC16:
9088 case R_PPC64_TOC16_LO:
9089 case R_PPC64_TOC16_HI:
9090 case R_PPC64_TOC16_HA:
9091 case R_PPC64_TOC16_DS:
9092 case R_PPC64_TOC16_LO_DS:
9093 break;
9094 }
9095
9096 r_symndx = ELF64_R_SYM (rel->r_info);
9097 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9098 r_symndx, ibfd))
9099 goto error_ret;
9100
9101 if (sym_sec != toc)
9102 continue;
9103
9104 if (h != NULL)
9105 val = h->root.u.def.value;
9106 else
9107 val = sym->st_value;
9108 val += rel->r_addend;
9109
9110 if (val >= toc->size)
9111 continue;
9112
9113 /* Anything in the toc ought to be aligned to 8 bytes.
9114 If not, don't mark as unused. */
9115 if (val & 7)
9116 continue;
9117
9118 if (skip == NULL)
9119 {
9120 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9121 if (skip == NULL)
9122 goto error_ret;
9123 }
9124
9125 skip[val >> 3] = ref_from_discarded;
9126 }
9127
9128 if (elf_section_data (sec)->relocs != relstart)
9129 free (relstart);
9130 }
9131
9132 /* For largetoc loads of address constants, we can convert
9133 . addis rx,2,addr@got@ha
9134 . ld ry,addr@got@l(rx)
9135 to
9136 . addis rx,2,addr@toc@ha
9137 . addi ry,rx,addr@toc@l
9138 when addr is within 2G of the toc pointer. This then means
9139 that the word storing "addr" in the toc is no longer needed. */
9140
9141 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9142 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9143 && toc->reloc_count != 0)
9144 {
9145 /* Read toc relocs. */
9146 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9147 info->keep_memory);
9148 if (toc_relocs == NULL)
9149 goto error_ret;
9150
9151 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9152 {
9153 enum elf_ppc64_reloc_type r_type;
9154 unsigned long r_symndx;
9155 asection *sym_sec;
9156 struct elf_link_hash_entry *h;
9157 Elf_Internal_Sym *sym;
9158 bfd_vma val, addr;
9159
9160 r_type = ELF64_R_TYPE (rel->r_info);
9161 if (r_type != R_PPC64_ADDR64)
9162 continue;
9163
9164 r_symndx = ELF64_R_SYM (rel->r_info);
9165 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9166 r_symndx, ibfd))
9167 goto error_ret;
9168
9169 if (sym_sec == NULL
9170 || sym_sec->output_section == NULL
9171 || discarded_section (sym_sec))
9172 continue;
9173
9174 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9175 continue;
9176
9177 if (h != NULL)
9178 {
9179 if (h->type == STT_GNU_IFUNC)
9180 continue;
9181 val = h->root.u.def.value;
9182 }
9183 else
9184 {
9185 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9186 continue;
9187 val = sym->st_value;
9188 }
9189 val += rel->r_addend;
9190 val += sym_sec->output_section->vma + sym_sec->output_offset;
9191
9192 /* We don't yet know the exact toc pointer value, but we
9193 know it will be somewhere in the toc section. Don't
9194 optimize if the difference from any possible toc
9195 pointer is outside [ff..f80008000, 7fff7fff]. */
9196 addr = toc->output_section->vma + TOC_BASE_OFF;
9197 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9198 continue;
9199
9200 addr = toc->output_section->vma + toc->output_section->rawsize;
9201 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9202 continue;
9203
9204 if (skip == NULL)
9205 {
9206 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9207 if (skip == NULL)
9208 goto error_ret;
9209 }
9210
9211 skip[rel->r_offset >> 3]
9212 |= can_optimize | ((rel - toc_relocs) << 2);
9213 }
9214 }
9215
9216 if (skip == NULL)
9217 continue;
9218
9219 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9220 if (used == NULL)
9221 {
9222 error_ret:
9223 if (local_syms != NULL
9224 && symtab_hdr->contents != (unsigned char *) local_syms)
9225 free (local_syms);
9226 if (sec != NULL
9227 && relstart != NULL
9228 && elf_section_data (sec)->relocs != relstart)
9229 free (relstart);
9230 if (toc_relocs != NULL
9231 && elf_section_data (toc)->relocs != toc_relocs)
9232 free (toc_relocs);
9233 if (skip != NULL)
9234 free (skip);
9235 return FALSE;
9236 }
9237
9238 /* Now check all kept sections that might reference the toc.
9239 Check the toc itself last. */
9240 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9241 : ibfd->sections);
9242 sec != NULL;
9243 sec = (sec == toc ? NULL
9244 : sec->next == NULL ? toc
9245 : sec->next == toc && toc->next ? toc->next
9246 : sec->next))
9247 {
9248 int repeat;
9249
9250 if (sec->reloc_count == 0
9251 || discarded_section (sec)
9252 || get_opd_info (sec)
9253 || (sec->flags & SEC_ALLOC) == 0
9254 || (sec->flags & SEC_DEBUGGING) != 0)
9255 continue;
9256
9257 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9258 info->keep_memory);
9259 if (relstart == NULL)
9260 {
9261 free (used);
9262 goto error_ret;
9263 }
9264
9265 /* Mark toc entries referenced as used. */
9266 do
9267 {
9268 repeat = 0;
9269 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9270 {
9271 enum elf_ppc64_reloc_type r_type;
9272 unsigned long r_symndx;
9273 asection *sym_sec;
9274 struct elf_link_hash_entry *h;
9275 Elf_Internal_Sym *sym;
9276 bfd_vma val;
9277 enum {no_check, check_lo, check_ha} insn_check;
9278
9279 r_type = ELF64_R_TYPE (rel->r_info);
9280 switch (r_type)
9281 {
9282 default:
9283 insn_check = no_check;
9284 break;
9285
9286 case R_PPC64_GOT_TLSLD16_HA:
9287 case R_PPC64_GOT_TLSGD16_HA:
9288 case R_PPC64_GOT_TPREL16_HA:
9289 case R_PPC64_GOT_DTPREL16_HA:
9290 case R_PPC64_GOT16_HA:
9291 case R_PPC64_TOC16_HA:
9292 insn_check = check_ha;
9293 break;
9294
9295 case R_PPC64_GOT_TLSLD16_LO:
9296 case R_PPC64_GOT_TLSGD16_LO:
9297 case R_PPC64_GOT_TPREL16_LO_DS:
9298 case R_PPC64_GOT_DTPREL16_LO_DS:
9299 case R_PPC64_GOT16_LO:
9300 case R_PPC64_GOT16_LO_DS:
9301 case R_PPC64_TOC16_LO:
9302 case R_PPC64_TOC16_LO_DS:
9303 insn_check = check_lo;
9304 break;
9305 }
9306
9307 if (insn_check != no_check)
9308 {
9309 bfd_vma off = rel->r_offset & ~3;
9310 unsigned char buf[4];
9311 unsigned int insn;
9312
9313 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9314 {
9315 free (used);
9316 goto error_ret;
9317 }
9318 insn = bfd_get_32 (ibfd, buf);
9319 if (insn_check == check_lo
9320 ? !ok_lo_toc_insn (insn, r_type)
9321 : ((insn & ((0x3f << 26) | 0x1f << 16))
9322 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9323 {
9324 char str[12];
9325
9326 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9327 sprintf (str, "%#08x", insn);
9328 info->callbacks->einfo
9329 /* xgettext:c-format */
9330 (_("%H: toc optimization is not supported for"
9331 " %s instruction.\n"),
9332 ibfd, sec, rel->r_offset & ~3, str);
9333 }
9334 }
9335
9336 switch (r_type)
9337 {
9338 case R_PPC64_TOC16:
9339 case R_PPC64_TOC16_LO:
9340 case R_PPC64_TOC16_HI:
9341 case R_PPC64_TOC16_HA:
9342 case R_PPC64_TOC16_DS:
9343 case R_PPC64_TOC16_LO_DS:
9344 /* In case we're taking addresses of toc entries. */
9345 case R_PPC64_ADDR64:
9346 break;
9347
9348 default:
9349 continue;
9350 }
9351
9352 r_symndx = ELF64_R_SYM (rel->r_info);
9353 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9354 r_symndx, ibfd))
9355 {
9356 free (used);
9357 goto error_ret;
9358 }
9359
9360 if (sym_sec != toc)
9361 continue;
9362
9363 if (h != NULL)
9364 val = h->root.u.def.value;
9365 else
9366 val = sym->st_value;
9367 val += rel->r_addend;
9368
9369 if (val >= toc->size)
9370 continue;
9371
9372 if ((skip[val >> 3] & can_optimize) != 0)
9373 {
9374 bfd_vma off;
9375 unsigned char opc;
9376
9377 switch (r_type)
9378 {
9379 case R_PPC64_TOC16_HA:
9380 break;
9381
9382 case R_PPC64_TOC16_LO_DS:
9383 off = rel->r_offset;
9384 off += (bfd_big_endian (ibfd) ? -2 : 3);
9385 if (!bfd_get_section_contents (ibfd, sec, &opc,
9386 off, 1))
9387 {
9388 free (used);
9389 goto error_ret;
9390 }
9391 if ((opc & (0x3f << 2)) == (58u << 2))
9392 break;
9393 /* Fall through. */
9394
9395 default:
9396 /* Wrong sort of reloc, or not a ld. We may
9397 as well clear ref_from_discarded too. */
9398 skip[val >> 3] = 0;
9399 }
9400 }
9401
9402 if (sec != toc)
9403 used[val >> 3] = 1;
9404 /* For the toc section, we only mark as used if this
9405 entry itself isn't unused. */
9406 else if ((used[rel->r_offset >> 3]
9407 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9408 && !used[val >> 3])
9409 {
9410 /* Do all the relocs again, to catch reference
9411 chains. */
9412 repeat = 1;
9413 used[val >> 3] = 1;
9414 }
9415 }
9416 }
9417 while (repeat);
9418
9419 if (elf_section_data (sec)->relocs != relstart)
9420 free (relstart);
9421 }
9422
9423 /* Merge the used and skip arrays. Assume that TOC
9424 doublewords not appearing as either used or unused belong
9425 to an entry more than one doubleword in size. */
9426 for (drop = skip, keep = used, last = 0, some_unused = 0;
9427 drop < skip + (toc->size + 7) / 8;
9428 ++drop, ++keep)
9429 {
9430 if (*keep)
9431 {
9432 *drop &= ~ref_from_discarded;
9433 if ((*drop & can_optimize) != 0)
9434 some_unused = 1;
9435 last = 0;
9436 }
9437 else if ((*drop & ref_from_discarded) != 0)
9438 {
9439 some_unused = 1;
9440 last = ref_from_discarded;
9441 }
9442 else
9443 *drop = last;
9444 }
9445
9446 free (used);
9447
9448 if (some_unused)
9449 {
9450 bfd_byte *contents, *src;
9451 unsigned long off;
9452 Elf_Internal_Sym *sym;
9453 bfd_boolean local_toc_syms = FALSE;
9454
9455 /* Shuffle the toc contents, and at the same time convert the
9456 skip array from booleans into offsets. */
9457 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9458 goto error_ret;
9459
9460 elf_section_data (toc)->this_hdr.contents = contents;
9461
9462 for (src = contents, off = 0, drop = skip;
9463 src < contents + toc->size;
9464 src += 8, ++drop)
9465 {
9466 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9467 off += 8;
9468 else if (off != 0)
9469 {
9470 *drop = off;
9471 memcpy (src - off, src, 8);
9472 }
9473 }
9474 *drop = off;
9475 toc->rawsize = toc->size;
9476 toc->size = src - contents - off;
9477
9478 /* Adjust addends for relocs against the toc section sym,
9479 and optimize any accesses we can. */
9480 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9481 {
9482 if (sec->reloc_count == 0
9483 || discarded_section (sec))
9484 continue;
9485
9486 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9487 info->keep_memory);
9488 if (relstart == NULL)
9489 goto error_ret;
9490
9491 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9492 {
9493 enum elf_ppc64_reloc_type r_type;
9494 unsigned long r_symndx;
9495 asection *sym_sec;
9496 struct elf_link_hash_entry *h;
9497 bfd_vma val;
9498
9499 r_type = ELF64_R_TYPE (rel->r_info);
9500 switch (r_type)
9501 {
9502 default:
9503 continue;
9504
9505 case R_PPC64_TOC16:
9506 case R_PPC64_TOC16_LO:
9507 case R_PPC64_TOC16_HI:
9508 case R_PPC64_TOC16_HA:
9509 case R_PPC64_TOC16_DS:
9510 case R_PPC64_TOC16_LO_DS:
9511 case R_PPC64_ADDR64:
9512 break;
9513 }
9514
9515 r_symndx = ELF64_R_SYM (rel->r_info);
9516 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9517 r_symndx, ibfd))
9518 goto error_ret;
9519
9520 if (sym_sec != toc)
9521 continue;
9522
9523 if (h != NULL)
9524 val = h->root.u.def.value;
9525 else
9526 {
9527 val = sym->st_value;
9528 if (val != 0)
9529 local_toc_syms = TRUE;
9530 }
9531
9532 val += rel->r_addend;
9533
9534 if (val > toc->rawsize)
9535 val = toc->rawsize;
9536 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9537 continue;
9538 else if ((skip[val >> 3] & can_optimize) != 0)
9539 {
9540 Elf_Internal_Rela *tocrel
9541 = toc_relocs + (skip[val >> 3] >> 2);
9542 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9543
9544 switch (r_type)
9545 {
9546 case R_PPC64_TOC16_HA:
9547 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9548 break;
9549
9550 case R_PPC64_TOC16_LO_DS:
9551 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9552 break;
9553
9554 default:
9555 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9556 ppc_howto_init ();
9557 info->callbacks->einfo
9558 /* xgettext:c-format */
9559 (_("%H: %s references "
9560 "optimized away TOC entry\n"),
9561 ibfd, sec, rel->r_offset,
9562 ppc64_elf_howto_table[r_type]->name);
9563 bfd_set_error (bfd_error_bad_value);
9564 goto error_ret;
9565 }
9566 rel->r_addend = tocrel->r_addend;
9567 elf_section_data (sec)->relocs = relstart;
9568 continue;
9569 }
9570
9571 if (h != NULL || sym->st_value != 0)
9572 continue;
9573
9574 rel->r_addend -= skip[val >> 3];
9575 elf_section_data (sec)->relocs = relstart;
9576 }
9577
9578 if (elf_section_data (sec)->relocs != relstart)
9579 free (relstart);
9580 }
9581
9582 /* We shouldn't have local or global symbols defined in the TOC,
9583 but handle them anyway. */
9584 if (local_syms != NULL)
9585 for (sym = local_syms;
9586 sym < local_syms + symtab_hdr->sh_info;
9587 ++sym)
9588 if (sym->st_value != 0
9589 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9590 {
9591 unsigned long i;
9592
9593 if (sym->st_value > toc->rawsize)
9594 i = toc->rawsize >> 3;
9595 else
9596 i = sym->st_value >> 3;
9597
9598 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9599 {
9600 if (local_toc_syms)
9601 _bfd_error_handler
9602 (_("%s defined on removed toc entry"),
9603 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9604 do
9605 ++i;
9606 while ((skip[i] & (ref_from_discarded | can_optimize)));
9607 sym->st_value = (bfd_vma) i << 3;
9608 }
9609
9610 sym->st_value -= skip[i];
9611 symtab_hdr->contents = (unsigned char *) local_syms;
9612 }
9613
9614 /* Adjust any global syms defined in this toc input section. */
9615 if (toc_inf.global_toc_syms)
9616 {
9617 toc_inf.toc = toc;
9618 toc_inf.skip = skip;
9619 toc_inf.global_toc_syms = FALSE;
9620 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9621 &toc_inf);
9622 }
9623
9624 if (toc->reloc_count != 0)
9625 {
9626 Elf_Internal_Shdr *rel_hdr;
9627 Elf_Internal_Rela *wrel;
9628 bfd_size_type sz;
9629
9630 /* Remove unused toc relocs, and adjust those we keep. */
9631 if (toc_relocs == NULL)
9632 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9633 info->keep_memory);
9634 if (toc_relocs == NULL)
9635 goto error_ret;
9636
9637 wrel = toc_relocs;
9638 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9639 if ((skip[rel->r_offset >> 3]
9640 & (ref_from_discarded | can_optimize)) == 0)
9641 {
9642 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9643 wrel->r_info = rel->r_info;
9644 wrel->r_addend = rel->r_addend;
9645 ++wrel;
9646 }
9647 else if (!dec_dynrel_count (rel->r_info, toc, info,
9648 &local_syms, NULL, NULL))
9649 goto error_ret;
9650
9651 elf_section_data (toc)->relocs = toc_relocs;
9652 toc->reloc_count = wrel - toc_relocs;
9653 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9654 sz = rel_hdr->sh_entsize;
9655 rel_hdr->sh_size = toc->reloc_count * sz;
9656 }
9657 }
9658 else if (toc_relocs != NULL
9659 && elf_section_data (toc)->relocs != toc_relocs)
9660 free (toc_relocs);
9661
9662 if (local_syms != NULL
9663 && symtab_hdr->contents != (unsigned char *) local_syms)
9664 {
9665 if (!info->keep_memory)
9666 free (local_syms);
9667 else
9668 symtab_hdr->contents = (unsigned char *) local_syms;
9669 }
9670 free (skip);
9671 }
9672
9673 return TRUE;
9674 }
9675
9676 /* Return true iff input section I references the TOC using
9677 instructions limited to +/-32k offsets. */
9678
9679 bfd_boolean
9680 ppc64_elf_has_small_toc_reloc (asection *i)
9681 {
9682 return (is_ppc64_elf (i->owner)
9683 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9684 }
9685
9686 /* Allocate space for one GOT entry. */
9687
9688 static void
9689 allocate_got (struct elf_link_hash_entry *h,
9690 struct bfd_link_info *info,
9691 struct got_entry *gent)
9692 {
9693 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9694 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9695 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9696 ? 16 : 8);
9697 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9698 ? 2 : 1) * sizeof (Elf64_External_Rela);
9699 asection *got = ppc64_elf_tdata (gent->owner)->got;
9700
9701 gent->got.offset = got->size;
9702 got->size += entsize;
9703
9704 if (h->type == STT_GNU_IFUNC)
9705 {
9706 htab->elf.irelplt->size += rentsize;
9707 htab->got_reli_size += rentsize;
9708 }
9709 else if ((bfd_link_pic (info)
9710 || (htab->elf.dynamic_sections_created
9711 && h->dynindx != -1
9712 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9713 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9714 {
9715 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9716 relgot->size += rentsize;
9717 }
9718 }
9719
9720 /* This function merges got entries in the same toc group. */
9721
9722 static void
9723 merge_got_entries (struct got_entry **pent)
9724 {
9725 struct got_entry *ent, *ent2;
9726
9727 for (ent = *pent; ent != NULL; ent = ent->next)
9728 if (!ent->is_indirect)
9729 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9730 if (!ent2->is_indirect
9731 && ent2->addend == ent->addend
9732 && ent2->tls_type == ent->tls_type
9733 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9734 {
9735 ent2->is_indirect = TRUE;
9736 ent2->got.ent = ent;
9737 }
9738 }
9739
9740 /* If H is undefined weak, make it dynamic if that makes sense. */
9741
9742 static bfd_boolean
9743 ensure_undefweak_dynamic (struct bfd_link_info *info,
9744 struct elf_link_hash_entry *h)
9745 {
9746 struct elf_link_hash_table *htab = elf_hash_table (info);
9747
9748 if (htab->dynamic_sections_created
9749 && info->dynamic_undefined_weak != 0
9750 && h->root.type == bfd_link_hash_undefweak
9751 && h->dynindx == -1
9752 && !h->forced_local
9753 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9754 return bfd_elf_link_record_dynamic_symbol (info, h);
9755 return TRUE;
9756 }
9757
9758 /* Allocate space in .plt, .got and associated reloc sections for
9759 dynamic relocs. */
9760
9761 static bfd_boolean
9762 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9763 {
9764 struct bfd_link_info *info;
9765 struct ppc_link_hash_table *htab;
9766 asection *s;
9767 struct ppc_link_hash_entry *eh;
9768 struct got_entry **pgent, *gent;
9769
9770 if (h->root.type == bfd_link_hash_indirect)
9771 return TRUE;
9772
9773 info = (struct bfd_link_info *) inf;
9774 htab = ppc_hash_table (info);
9775 if (htab == NULL)
9776 return FALSE;
9777
9778 eh = (struct ppc_link_hash_entry *) h;
9779 /* Run through the TLS GD got entries first if we're changing them
9780 to TPREL. */
9781 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9782 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9783 if (gent->got.refcount > 0
9784 && (gent->tls_type & TLS_GD) != 0)
9785 {
9786 /* This was a GD entry that has been converted to TPREL. If
9787 there happens to be a TPREL entry we can use that one. */
9788 struct got_entry *ent;
9789 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9790 if (ent->got.refcount > 0
9791 && (ent->tls_type & TLS_TPREL) != 0
9792 && ent->addend == gent->addend
9793 && ent->owner == gent->owner)
9794 {
9795 gent->got.refcount = 0;
9796 break;
9797 }
9798
9799 /* If not, then we'll be using our own TPREL entry. */
9800 if (gent->got.refcount != 0)
9801 gent->tls_type = TLS_TLS | TLS_TPREL;
9802 }
9803
9804 /* Remove any list entry that won't generate a word in the GOT before
9805 we call merge_got_entries. Otherwise we risk merging to empty
9806 entries. */
9807 pgent = &h->got.glist;
9808 while ((gent = *pgent) != NULL)
9809 if (gent->got.refcount > 0)
9810 {
9811 if ((gent->tls_type & TLS_LD) != 0
9812 && !h->def_dynamic)
9813 {
9814 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9815 *pgent = gent->next;
9816 }
9817 else
9818 pgent = &gent->next;
9819 }
9820 else
9821 *pgent = gent->next;
9822
9823 if (!htab->do_multi_toc)
9824 merge_got_entries (&h->got.glist);
9825
9826 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9827 if (!gent->is_indirect)
9828 {
9829 /* Make sure this symbol is output as a dynamic symbol.
9830 Undefined weak syms won't yet be marked as dynamic. */
9831 if (!ensure_undefweak_dynamic (info, h))
9832 return FALSE;
9833
9834 if (!is_ppc64_elf (gent->owner))
9835 abort ();
9836
9837 allocate_got (h, info, gent);
9838 }
9839
9840 /* If no dynamic sections we can't have dynamic relocs, except for
9841 IFUNCs which are handled even in static executables. */
9842 if (!htab->elf.dynamic_sections_created
9843 && h->type != STT_GNU_IFUNC)
9844 eh->dyn_relocs = NULL;
9845
9846 /* Also discard relocs on undefined weak syms with non-default
9847 visibility, or when dynamic_undefined_weak says so. */
9848 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9849 eh->dyn_relocs = NULL;
9850
9851 if (eh->dyn_relocs != NULL)
9852 {
9853 struct elf_dyn_relocs *p, **pp;
9854
9855 /* In the shared -Bsymbolic case, discard space allocated for
9856 dynamic pc-relative relocs against symbols which turn out to
9857 be defined in regular objects. For the normal shared case,
9858 discard space for relocs that have become local due to symbol
9859 visibility changes. */
9860
9861 if (bfd_link_pic (info))
9862 {
9863 /* Relocs that use pc_count are those that appear on a call
9864 insn, or certain REL relocs (see must_be_dyn_reloc) that
9865 can be generated via assembly. We want calls to
9866 protected symbols to resolve directly to the function
9867 rather than going via the plt. If people want function
9868 pointer comparisons to work as expected then they should
9869 avoid writing weird assembly. */
9870 if (SYMBOL_CALLS_LOCAL (info, h))
9871 {
9872 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9873 {
9874 p->count -= p->pc_count;
9875 p->pc_count = 0;
9876 if (p->count == 0)
9877 *pp = p->next;
9878 else
9879 pp = &p->next;
9880 }
9881 }
9882
9883 if (eh->dyn_relocs != NULL)
9884 {
9885 /* Make sure this symbol is output as a dynamic symbol.
9886 Undefined weak syms won't yet be marked as dynamic. */
9887 if (!ensure_undefweak_dynamic (info, h))
9888 return FALSE;
9889 }
9890 }
9891 else if (h->type == STT_GNU_IFUNC)
9892 {
9893 /* A plt entry is always created when making direct calls to
9894 an ifunc, even when building a static executable, but
9895 that doesn't cover all cases. We may have only an ifunc
9896 initialised function pointer for a given ifunc symbol.
9897
9898 For ELFv2, dynamic relocations are not required when
9899 generating a global entry PLT stub. */
9900 if (abiversion (info->output_bfd) >= 2)
9901 {
9902 if (global_entry_stub (h))
9903 eh->dyn_relocs = NULL;
9904 }
9905
9906 /* For ELFv1 we have function descriptors. Descriptors need
9907 to be treated like PLT entries and thus have dynamic
9908 relocations. One exception is when the function
9909 descriptor is copied into .dynbss (which should only
9910 happen with ancient versions of gcc). */
9911 else if (h->needs_copy)
9912 eh->dyn_relocs = NULL;
9913 }
9914 else if (ELIMINATE_COPY_RELOCS)
9915 {
9916 /* For the non-pic case, discard space for relocs against
9917 symbols which turn out to need copy relocs or are not
9918 dynamic. */
9919 if (!h->non_got_ref
9920 && !h->def_regular)
9921 {
9922 /* Make sure this symbol is output as a dynamic symbol.
9923 Undefined weak syms won't yet be marked as dynamic. */
9924 if (!ensure_undefweak_dynamic (info, h))
9925 return FALSE;
9926
9927 if (h->dynindx == -1)
9928 eh->dyn_relocs = NULL;
9929 }
9930 else
9931 eh->dyn_relocs = NULL;
9932 }
9933
9934 /* Finally, allocate space. */
9935 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9936 {
9937 asection *sreloc = elf_section_data (p->sec)->sreloc;
9938 if (eh->elf.type == STT_GNU_IFUNC)
9939 sreloc = htab->elf.irelplt;
9940 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9941 }
9942 }
9943
9944 if ((htab->elf.dynamic_sections_created
9945 && h->dynindx != -1)
9946 || h->type == STT_GNU_IFUNC)
9947 {
9948 struct plt_entry *pent;
9949 bfd_boolean doneone = FALSE;
9950 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9951 if (pent->plt.refcount > 0)
9952 {
9953 if (!htab->elf.dynamic_sections_created
9954 || h->dynindx == -1)
9955 {
9956 s = htab->elf.iplt;
9957 pent->plt.offset = s->size;
9958 s->size += PLT_ENTRY_SIZE (htab);
9959 s = htab->elf.irelplt;
9960 }
9961 else
9962 {
9963 /* If this is the first .plt entry, make room for the special
9964 first entry. */
9965 s = htab->elf.splt;
9966 if (s->size == 0)
9967 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9968
9969 pent->plt.offset = s->size;
9970
9971 /* Make room for this entry. */
9972 s->size += PLT_ENTRY_SIZE (htab);
9973
9974 /* Make room for the .glink code. */
9975 s = htab->glink;
9976 if (s->size == 0)
9977 s->size += GLINK_CALL_STUB_SIZE;
9978 if (htab->opd_abi)
9979 {
9980 /* We need bigger stubs past index 32767. */
9981 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9982 s->size += 4;
9983 s->size += 2*4;
9984 }
9985 else
9986 s->size += 4;
9987
9988 /* We also need to make an entry in the .rela.plt section. */
9989 s = htab->elf.srelplt;
9990 }
9991 s->size += sizeof (Elf64_External_Rela);
9992 doneone = TRUE;
9993 }
9994 else
9995 pent->plt.offset = (bfd_vma) -1;
9996 if (!doneone)
9997 {
9998 h->plt.plist = NULL;
9999 h->needs_plt = 0;
10000 }
10001 }
10002 else
10003 {
10004 h->plt.plist = NULL;
10005 h->needs_plt = 0;
10006 }
10007
10008 return TRUE;
10009 }
10010
10011 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
10012 to set up space for global entry stubs. These are put in glink,
10013 after the branch table. */
10014
10015 static bfd_boolean
10016 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
10017 {
10018 struct bfd_link_info *info;
10019 struct ppc_link_hash_table *htab;
10020 struct plt_entry *pent;
10021 asection *s;
10022
10023 if (h->root.type == bfd_link_hash_indirect)
10024 return TRUE;
10025
10026 if (!h->pointer_equality_needed)
10027 return TRUE;
10028
10029 if (h->def_regular)
10030 return TRUE;
10031
10032 info = inf;
10033 htab = ppc_hash_table (info);
10034 if (htab == NULL)
10035 return FALSE;
10036
10037 s = htab->glink;
10038 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10039 if (pent->plt.offset != (bfd_vma) -1
10040 && pent->addend == 0)
10041 {
10042 /* For ELFv2, if this symbol is not defined in a regular file
10043 and we are not generating a shared library or pie, then we
10044 need to define the symbol in the executable on a call stub.
10045 This is to avoid text relocations. */
10046 s->size = (s->size + 15) & -16;
10047 h->root.type = bfd_link_hash_defined;
10048 h->root.u.def.section = s;
10049 h->root.u.def.value = s->size;
10050 s->size += 16;
10051 break;
10052 }
10053 return TRUE;
10054 }
10055
10056 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10057 read-only sections. */
10058
10059 static bfd_boolean
10060 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10061 {
10062 if (h->root.type == bfd_link_hash_indirect)
10063 return TRUE;
10064
10065 if (readonly_dynrelocs (h))
10066 {
10067 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10068
10069 /* Not an error, just cut short the traversal. */
10070 return FALSE;
10071 }
10072 return TRUE;
10073 }
10074
10075 /* Set the sizes of the dynamic sections. */
10076
10077 static bfd_boolean
10078 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10079 struct bfd_link_info *info)
10080 {
10081 struct ppc_link_hash_table *htab;
10082 bfd *dynobj;
10083 asection *s;
10084 bfd_boolean relocs;
10085 bfd *ibfd;
10086 struct got_entry *first_tlsld;
10087
10088 htab = ppc_hash_table (info);
10089 if (htab == NULL)
10090 return FALSE;
10091
10092 dynobj = htab->elf.dynobj;
10093 if (dynobj == NULL)
10094 abort ();
10095
10096 if (htab->elf.dynamic_sections_created)
10097 {
10098 /* Set the contents of the .interp section to the interpreter. */
10099 if (bfd_link_executable (info) && !info->nointerp)
10100 {
10101 s = bfd_get_linker_section (dynobj, ".interp");
10102 if (s == NULL)
10103 abort ();
10104 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10105 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10106 }
10107 }
10108
10109 /* Set up .got offsets for local syms, and space for local dynamic
10110 relocs. */
10111 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10112 {
10113 struct got_entry **lgot_ents;
10114 struct got_entry **end_lgot_ents;
10115 struct plt_entry **local_plt;
10116 struct plt_entry **end_local_plt;
10117 unsigned char *lgot_masks;
10118 bfd_size_type locsymcount;
10119 Elf_Internal_Shdr *symtab_hdr;
10120
10121 if (!is_ppc64_elf (ibfd))
10122 continue;
10123
10124 for (s = ibfd->sections; s != NULL; s = s->next)
10125 {
10126 struct ppc_dyn_relocs *p;
10127
10128 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10129 {
10130 if (!bfd_is_abs_section (p->sec)
10131 && bfd_is_abs_section (p->sec->output_section))
10132 {
10133 /* Input section has been discarded, either because
10134 it is a copy of a linkonce section or due to
10135 linker script /DISCARD/, so we'll be discarding
10136 the relocs too. */
10137 }
10138 else if (p->count != 0)
10139 {
10140 asection *srel = elf_section_data (p->sec)->sreloc;
10141 if (p->ifunc)
10142 srel = htab->elf.irelplt;
10143 srel->size += p->count * sizeof (Elf64_External_Rela);
10144 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10145 info->flags |= DF_TEXTREL;
10146 }
10147 }
10148 }
10149
10150 lgot_ents = elf_local_got_ents (ibfd);
10151 if (!lgot_ents)
10152 continue;
10153
10154 symtab_hdr = &elf_symtab_hdr (ibfd);
10155 locsymcount = symtab_hdr->sh_info;
10156 end_lgot_ents = lgot_ents + locsymcount;
10157 local_plt = (struct plt_entry **) end_lgot_ents;
10158 end_local_plt = local_plt + locsymcount;
10159 lgot_masks = (unsigned char *) end_local_plt;
10160 s = ppc64_elf_tdata (ibfd)->got;
10161 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10162 {
10163 struct got_entry **pent, *ent;
10164
10165 pent = lgot_ents;
10166 while ((ent = *pent) != NULL)
10167 if (ent->got.refcount > 0)
10168 {
10169 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10170 {
10171 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10172 *pent = ent->next;
10173 }
10174 else
10175 {
10176 unsigned int ent_size = 8;
10177 unsigned int rel_size = sizeof (Elf64_External_Rela);
10178
10179 ent->got.offset = s->size;
10180 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10181 {
10182 ent_size *= 2;
10183 rel_size *= 2;
10184 }
10185 s->size += ent_size;
10186 if ((*lgot_masks & PLT_IFUNC) != 0)
10187 {
10188 htab->elf.irelplt->size += rel_size;
10189 htab->got_reli_size += rel_size;
10190 }
10191 else if (bfd_link_pic (info))
10192 {
10193 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10194 srel->size += rel_size;
10195 }
10196 pent = &ent->next;
10197 }
10198 }
10199 else
10200 *pent = ent->next;
10201 }
10202
10203 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10204 for (; local_plt < end_local_plt; ++local_plt)
10205 {
10206 struct plt_entry *ent;
10207
10208 for (ent = *local_plt; ent != NULL; ent = ent->next)
10209 if (ent->plt.refcount > 0)
10210 {
10211 s = htab->elf.iplt;
10212 ent->plt.offset = s->size;
10213 s->size += PLT_ENTRY_SIZE (htab);
10214
10215 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10216 }
10217 else
10218 ent->plt.offset = (bfd_vma) -1;
10219 }
10220 }
10221
10222 /* Allocate global sym .plt and .got entries, and space for global
10223 sym dynamic relocs. */
10224 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10225 /* Stash the end of glink branch table. */
10226 if (htab->glink != NULL)
10227 htab->glink->rawsize = htab->glink->size;
10228
10229 if (!htab->opd_abi && !bfd_link_pic (info))
10230 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10231
10232 first_tlsld = NULL;
10233 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10234 {
10235 struct got_entry *ent;
10236
10237 if (!is_ppc64_elf (ibfd))
10238 continue;
10239
10240 ent = ppc64_tlsld_got (ibfd);
10241 if (ent->got.refcount > 0)
10242 {
10243 if (!htab->do_multi_toc && first_tlsld != NULL)
10244 {
10245 ent->is_indirect = TRUE;
10246 ent->got.ent = first_tlsld;
10247 }
10248 else
10249 {
10250 if (first_tlsld == NULL)
10251 first_tlsld = ent;
10252 s = ppc64_elf_tdata (ibfd)->got;
10253 ent->got.offset = s->size;
10254 ent->owner = ibfd;
10255 s->size += 16;
10256 if (bfd_link_pic (info))
10257 {
10258 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10259 srel->size += sizeof (Elf64_External_Rela);
10260 }
10261 }
10262 }
10263 else
10264 ent->got.offset = (bfd_vma) -1;
10265 }
10266
10267 /* We now have determined the sizes of the various dynamic sections.
10268 Allocate memory for them. */
10269 relocs = FALSE;
10270 for (s = dynobj->sections; s != NULL; s = s->next)
10271 {
10272 if ((s->flags & SEC_LINKER_CREATED) == 0)
10273 continue;
10274
10275 if (s == htab->brlt || s == htab->relbrlt)
10276 /* These haven't been allocated yet; don't strip. */
10277 continue;
10278 else if (s == htab->elf.sgot
10279 || s == htab->elf.splt
10280 || s == htab->elf.iplt
10281 || s == htab->glink
10282 || s == htab->elf.sdynbss
10283 || s == htab->elf.sdynrelro)
10284 {
10285 /* Strip this section if we don't need it; see the
10286 comment below. */
10287 }
10288 else if (s == htab->glink_eh_frame)
10289 {
10290 if (!bfd_is_abs_section (s->output_section))
10291 /* Not sized yet. */
10292 continue;
10293 }
10294 else if (CONST_STRNEQ (s->name, ".rela"))
10295 {
10296 if (s->size != 0)
10297 {
10298 if (s != htab->elf.srelplt)
10299 relocs = TRUE;
10300
10301 /* We use the reloc_count field as a counter if we need
10302 to copy relocs into the output file. */
10303 s->reloc_count = 0;
10304 }
10305 }
10306 else
10307 {
10308 /* It's not one of our sections, so don't allocate space. */
10309 continue;
10310 }
10311
10312 if (s->size == 0)
10313 {
10314 /* If we don't need this section, strip it from the
10315 output file. This is mostly to handle .rela.bss and
10316 .rela.plt. We must create both sections in
10317 create_dynamic_sections, because they must be created
10318 before the linker maps input sections to output
10319 sections. The linker does that before
10320 adjust_dynamic_symbol is called, and it is that
10321 function which decides whether anything needs to go
10322 into these sections. */
10323 s->flags |= SEC_EXCLUDE;
10324 continue;
10325 }
10326
10327 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10328 continue;
10329
10330 /* Allocate memory for the section contents. We use bfd_zalloc
10331 here in case unused entries are not reclaimed before the
10332 section's contents are written out. This should not happen,
10333 but this way if it does we get a R_PPC64_NONE reloc in .rela
10334 sections instead of garbage.
10335 We also rely on the section contents being zero when writing
10336 the GOT and .dynrelro. */
10337 s->contents = bfd_zalloc (dynobj, s->size);
10338 if (s->contents == NULL)
10339 return FALSE;
10340 }
10341
10342 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10343 {
10344 if (!is_ppc64_elf (ibfd))
10345 continue;
10346
10347 s = ppc64_elf_tdata (ibfd)->got;
10348 if (s != NULL && s != htab->elf.sgot)
10349 {
10350 if (s->size == 0)
10351 s->flags |= SEC_EXCLUDE;
10352 else
10353 {
10354 s->contents = bfd_zalloc (ibfd, s->size);
10355 if (s->contents == NULL)
10356 return FALSE;
10357 }
10358 }
10359 s = ppc64_elf_tdata (ibfd)->relgot;
10360 if (s != NULL)
10361 {
10362 if (s->size == 0)
10363 s->flags |= SEC_EXCLUDE;
10364 else
10365 {
10366 s->contents = bfd_zalloc (ibfd, s->size);
10367 if (s->contents == NULL)
10368 return FALSE;
10369 relocs = TRUE;
10370 s->reloc_count = 0;
10371 }
10372 }
10373 }
10374
10375 if (htab->elf.dynamic_sections_created)
10376 {
10377 bfd_boolean tls_opt;
10378
10379 /* Add some entries to the .dynamic section. We fill in the
10380 values later, in ppc64_elf_finish_dynamic_sections, but we
10381 must add the entries now so that we get the correct size for
10382 the .dynamic section. The DT_DEBUG entry is filled in by the
10383 dynamic linker and used by the debugger. */
10384 #define add_dynamic_entry(TAG, VAL) \
10385 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10386
10387 if (bfd_link_executable (info))
10388 {
10389 if (!add_dynamic_entry (DT_DEBUG, 0))
10390 return FALSE;
10391 }
10392
10393 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10394 {
10395 if (!add_dynamic_entry (DT_PLTGOT, 0)
10396 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10397 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10398 || !add_dynamic_entry (DT_JMPREL, 0)
10399 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10400 return FALSE;
10401 }
10402
10403 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10404 {
10405 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10406 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10407 return FALSE;
10408 }
10409
10410 tls_opt = (htab->params->tls_get_addr_opt
10411 && htab->tls_get_addr_fd != NULL
10412 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10413 if (tls_opt || !htab->opd_abi)
10414 {
10415 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10416 return FALSE;
10417 }
10418
10419 if (relocs)
10420 {
10421 if (!add_dynamic_entry (DT_RELA, 0)
10422 || !add_dynamic_entry (DT_RELASZ, 0)
10423 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10424 return FALSE;
10425
10426 /* If any dynamic relocs apply to a read-only section,
10427 then we need a DT_TEXTREL entry. */
10428 if ((info->flags & DF_TEXTREL) == 0)
10429 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10430
10431 if ((info->flags & DF_TEXTREL) != 0)
10432 {
10433 if (!add_dynamic_entry (DT_TEXTREL, 0))
10434 return FALSE;
10435 }
10436 }
10437 }
10438 #undef add_dynamic_entry
10439
10440 return TRUE;
10441 }
10442
10443 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10444
10445 static bfd_boolean
10446 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10447 {
10448 if (h->plt.plist != NULL
10449 && !h->def_regular
10450 && !h->pointer_equality_needed)
10451 return FALSE;
10452
10453 return _bfd_elf_hash_symbol (h);
10454 }
10455
10456 /* Determine the type of stub needed, if any, for a call. */
10457
10458 static inline enum ppc_stub_type
10459 ppc_type_of_stub (asection *input_sec,
10460 const Elf_Internal_Rela *rel,
10461 struct ppc_link_hash_entry **hash,
10462 struct plt_entry **plt_ent,
10463 bfd_vma destination,
10464 unsigned long local_off)
10465 {
10466 struct ppc_link_hash_entry *h = *hash;
10467 bfd_vma location;
10468 bfd_vma branch_offset;
10469 bfd_vma max_branch_offset;
10470 enum elf_ppc64_reloc_type r_type;
10471
10472 if (h != NULL)
10473 {
10474 struct plt_entry *ent;
10475 struct ppc_link_hash_entry *fdh = h;
10476 if (h->oh != NULL
10477 && h->oh->is_func_descriptor)
10478 {
10479 fdh = ppc_follow_link (h->oh);
10480 *hash = fdh;
10481 }
10482
10483 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10484 if (ent->addend == rel->r_addend
10485 && ent->plt.offset != (bfd_vma) -1)
10486 {
10487 *plt_ent = ent;
10488 return ppc_stub_plt_call;
10489 }
10490
10491 /* Here, we know we don't have a plt entry. If we don't have a
10492 either a defined function descriptor or a defined entry symbol
10493 in a regular object file, then it is pointless trying to make
10494 any other type of stub. */
10495 if (!is_static_defined (&fdh->elf)
10496 && !is_static_defined (&h->elf))
10497 return ppc_stub_none;
10498 }
10499 else if (elf_local_got_ents (input_sec->owner) != NULL)
10500 {
10501 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10502 struct plt_entry **local_plt = (struct plt_entry **)
10503 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10504 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10505
10506 if (local_plt[r_symndx] != NULL)
10507 {
10508 struct plt_entry *ent;
10509
10510 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10511 if (ent->addend == rel->r_addend
10512 && ent->plt.offset != (bfd_vma) -1)
10513 {
10514 *plt_ent = ent;
10515 return ppc_stub_plt_call;
10516 }
10517 }
10518 }
10519
10520 /* Determine where the call point is. */
10521 location = (input_sec->output_offset
10522 + input_sec->output_section->vma
10523 + rel->r_offset);
10524
10525 branch_offset = destination - location;
10526 r_type = ELF64_R_TYPE (rel->r_info);
10527
10528 /* Determine if a long branch stub is needed. */
10529 max_branch_offset = 1 << 25;
10530 if (r_type != R_PPC64_REL24)
10531 max_branch_offset = 1 << 15;
10532
10533 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10534 /* We need a stub. Figure out whether a long_branch or plt_branch
10535 is needed later. */
10536 return ppc_stub_long_branch;
10537
10538 return ppc_stub_none;
10539 }
10540
10541 /* With power7 weakly ordered memory model, it is possible for ld.so
10542 to update a plt entry in one thread and have another thread see a
10543 stale zero toc entry. To avoid this we need some sort of acquire
10544 barrier in the call stub. One solution is to make the load of the
10545 toc word seem to appear to depend on the load of the function entry
10546 word. Another solution is to test for r2 being zero, and branch to
10547 the appropriate glink entry if so.
10548
10549 . fake dep barrier compare
10550 . ld 12,xxx(2) ld 12,xxx(2)
10551 . mtctr 12 mtctr 12
10552 . xor 11,12,12 ld 2,xxx+8(2)
10553 . add 2,2,11 cmpldi 2,0
10554 . ld 2,xxx+8(2) bnectr+
10555 . bctr b <glink_entry>
10556
10557 The solution involving the compare turns out to be faster, so
10558 that's what we use unless the branch won't reach. */
10559
10560 #define ALWAYS_USE_FAKE_DEP 0
10561 #define ALWAYS_EMIT_R2SAVE 0
10562
10563 #define PPC_LO(v) ((v) & 0xffff)
10564 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10565 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10566
10567 static inline unsigned int
10568 plt_stub_size (struct ppc_link_hash_table *htab,
10569 struct ppc_stub_hash_entry *stub_entry,
10570 bfd_vma off)
10571 {
10572 unsigned size = 12;
10573
10574 if (ALWAYS_EMIT_R2SAVE
10575 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10576 size += 4;
10577 if (PPC_HA (off) != 0)
10578 size += 4;
10579 if (htab->opd_abi)
10580 {
10581 size += 4;
10582 if (htab->params->plt_static_chain)
10583 size += 4;
10584 if (htab->params->plt_thread_safe
10585 && htab->elf.dynamic_sections_created
10586 && stub_entry->h != NULL
10587 && stub_entry->h->elf.dynindx != -1)
10588 size += 8;
10589 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10590 size += 4;
10591 }
10592 if (stub_entry->h != NULL
10593 && (stub_entry->h == htab->tls_get_addr_fd
10594 || stub_entry->h == htab->tls_get_addr)
10595 && htab->params->tls_get_addr_opt)
10596 {
10597 size += 7 * 4;
10598 if (ALWAYS_EMIT_R2SAVE
10599 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10600 size += 6 * 4;
10601 }
10602 return size;
10603 }
10604
10605 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10606 then return the padding needed to do so. */
10607 static inline unsigned int
10608 plt_stub_pad (struct ppc_link_hash_table *htab,
10609 struct ppc_stub_hash_entry *stub_entry,
10610 bfd_vma plt_off)
10611 {
10612 int stub_align = 1 << htab->params->plt_stub_align;
10613 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10614 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10615
10616 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10617 > ((stub_size - 1) & -stub_align))
10618 return stub_align - (stub_off & (stub_align - 1));
10619 return 0;
10620 }
10621
10622 /* Build a .plt call stub. */
10623
10624 static inline bfd_byte *
10625 build_plt_stub (struct ppc_link_hash_table *htab,
10626 struct ppc_stub_hash_entry *stub_entry,
10627 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10628 {
10629 bfd *obfd = htab->params->stub_bfd;
10630 bfd_boolean plt_load_toc = htab->opd_abi;
10631 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10632 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10633 && htab->elf.dynamic_sections_created
10634 && stub_entry->h != NULL
10635 && stub_entry->h->elf.dynindx != -1);
10636 bfd_boolean use_fake_dep = plt_thread_safe;
10637 bfd_vma cmp_branch_off = 0;
10638
10639 if (!ALWAYS_USE_FAKE_DEP
10640 && plt_load_toc
10641 && plt_thread_safe
10642 && !((stub_entry->h == htab->tls_get_addr_fd
10643 || stub_entry->h == htab->tls_get_addr)
10644 && htab->params->tls_get_addr_opt))
10645 {
10646 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10647 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10648 / PLT_ENTRY_SIZE (htab));
10649 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10650 bfd_vma to, from;
10651
10652 if (pltindex > 32768)
10653 glinkoff += (pltindex - 32768) * 4;
10654 to = (glinkoff
10655 + htab->glink->output_offset
10656 + htab->glink->output_section->vma);
10657 from = (p - stub_entry->group->stub_sec->contents
10658 + 4 * (ALWAYS_EMIT_R2SAVE
10659 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10660 + 4 * (PPC_HA (offset) != 0)
10661 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10662 != PPC_HA (offset))
10663 + 4 * (plt_static_chain != 0)
10664 + 20
10665 + stub_entry->group->stub_sec->output_offset
10666 + stub_entry->group->stub_sec->output_section->vma);
10667 cmp_branch_off = to - from;
10668 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10669 }
10670
10671 if (PPC_HA (offset) != 0)
10672 {
10673 if (r != NULL)
10674 {
10675 if (ALWAYS_EMIT_R2SAVE
10676 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10677 r[0].r_offset += 4;
10678 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10679 r[1].r_offset = r[0].r_offset + 4;
10680 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10681 r[1].r_addend = r[0].r_addend;
10682 if (plt_load_toc)
10683 {
10684 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10685 {
10686 r[2].r_offset = r[1].r_offset + 4;
10687 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10688 r[2].r_addend = r[0].r_addend;
10689 }
10690 else
10691 {
10692 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10693 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10694 r[2].r_addend = r[0].r_addend + 8;
10695 if (plt_static_chain)
10696 {
10697 r[3].r_offset = r[2].r_offset + 4;
10698 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10699 r[3].r_addend = r[0].r_addend + 16;
10700 }
10701 }
10702 }
10703 }
10704 if (ALWAYS_EMIT_R2SAVE
10705 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10706 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10707 if (plt_load_toc)
10708 {
10709 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10710 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10711 }
10712 else
10713 {
10714 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10715 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10716 }
10717 if (plt_load_toc
10718 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10719 {
10720 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10721 offset = 0;
10722 }
10723 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10724 if (plt_load_toc)
10725 {
10726 if (use_fake_dep)
10727 {
10728 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10729 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10730 }
10731 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10732 if (plt_static_chain)
10733 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10734 }
10735 }
10736 else
10737 {
10738 if (r != NULL)
10739 {
10740 if (ALWAYS_EMIT_R2SAVE
10741 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10742 r[0].r_offset += 4;
10743 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10744 if (plt_load_toc)
10745 {
10746 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10747 {
10748 r[1].r_offset = r[0].r_offset + 4;
10749 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10750 r[1].r_addend = r[0].r_addend;
10751 }
10752 else
10753 {
10754 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10755 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10756 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10757 if (plt_static_chain)
10758 {
10759 r[2].r_offset = r[1].r_offset + 4;
10760 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10761 r[2].r_addend = r[0].r_addend + 8;
10762 }
10763 }
10764 }
10765 }
10766 if (ALWAYS_EMIT_R2SAVE
10767 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10768 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10769 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10770 if (plt_load_toc
10771 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10772 {
10773 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10774 offset = 0;
10775 }
10776 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10777 if (plt_load_toc)
10778 {
10779 if (use_fake_dep)
10780 {
10781 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10782 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10783 }
10784 if (plt_static_chain)
10785 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10786 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10787 }
10788 }
10789 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10790 {
10791 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10792 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10793 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10794 }
10795 else
10796 bfd_put_32 (obfd, BCTR, p), p += 4;
10797 return p;
10798 }
10799
10800 /* Build a special .plt call stub for __tls_get_addr. */
10801
10802 #define LD_R11_0R3 0xe9630000
10803 #define LD_R12_0R3 0xe9830000
10804 #define MR_R0_R3 0x7c601b78
10805 #define CMPDI_R11_0 0x2c2b0000
10806 #define ADD_R3_R12_R13 0x7c6c6a14
10807 #define BEQLR 0x4d820020
10808 #define MR_R3_R0 0x7c030378
10809 #define STD_R11_0R1 0xf9610000
10810 #define BCTRL 0x4e800421
10811 #define LD_R11_0R1 0xe9610000
10812 #define MTLR_R11 0x7d6803a6
10813
10814 static inline bfd_byte *
10815 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10816 struct ppc_stub_hash_entry *stub_entry,
10817 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10818 {
10819 bfd *obfd = htab->params->stub_bfd;
10820
10821 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10822 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10823 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10824 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10825 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10826 bfd_put_32 (obfd, BEQLR, p), p += 4;
10827 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10828 if (r != NULL)
10829 r[0].r_offset += 7 * 4;
10830 if (!ALWAYS_EMIT_R2SAVE
10831 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10832 return build_plt_stub (htab, stub_entry, p, offset, r);
10833
10834 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10835 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10836
10837 if (r != NULL)
10838 r[0].r_offset += 2 * 4;
10839 p = build_plt_stub (htab, stub_entry, p, offset, r);
10840 bfd_put_32 (obfd, BCTRL, p - 4);
10841
10842 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10843 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10844 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10845 bfd_put_32 (obfd, BLR, p), p += 4;
10846
10847 return p;
10848 }
10849
10850 static Elf_Internal_Rela *
10851 get_relocs (asection *sec, int count)
10852 {
10853 Elf_Internal_Rela *relocs;
10854 struct bfd_elf_section_data *elfsec_data;
10855
10856 elfsec_data = elf_section_data (sec);
10857 relocs = elfsec_data->relocs;
10858 if (relocs == NULL)
10859 {
10860 bfd_size_type relsize;
10861 relsize = sec->reloc_count * sizeof (*relocs);
10862 relocs = bfd_alloc (sec->owner, relsize);
10863 if (relocs == NULL)
10864 return NULL;
10865 elfsec_data->relocs = relocs;
10866 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10867 sizeof (Elf_Internal_Shdr));
10868 if (elfsec_data->rela.hdr == NULL)
10869 return NULL;
10870 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10871 * sizeof (Elf64_External_Rela));
10872 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10873 sec->reloc_count = 0;
10874 }
10875 relocs += sec->reloc_count;
10876 sec->reloc_count += count;
10877 return relocs;
10878 }
10879
10880 static bfd_vma
10881 get_r2off (struct bfd_link_info *info,
10882 struct ppc_stub_hash_entry *stub_entry)
10883 {
10884 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10885 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10886
10887 if (r2off == 0)
10888 {
10889 /* Support linking -R objects. Get the toc pointer from the
10890 opd entry. */
10891 char buf[8];
10892 if (!htab->opd_abi)
10893 return r2off;
10894 asection *opd = stub_entry->h->elf.root.u.def.section;
10895 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10896
10897 if (strcmp (opd->name, ".opd") != 0
10898 || opd->reloc_count != 0)
10899 {
10900 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10901 stub_entry->h->elf.root.root.string);
10902 bfd_set_error (bfd_error_bad_value);
10903 return (bfd_vma) -1;
10904 }
10905 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10906 return (bfd_vma) -1;
10907 r2off = bfd_get_64 (opd->owner, buf);
10908 r2off -= elf_gp (info->output_bfd);
10909 }
10910 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10911 return r2off;
10912 }
10913
10914 static bfd_boolean
10915 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10916 {
10917 struct ppc_stub_hash_entry *stub_entry;
10918 struct ppc_branch_hash_entry *br_entry;
10919 struct bfd_link_info *info;
10920 struct ppc_link_hash_table *htab;
10921 bfd_byte *loc;
10922 bfd_byte *p;
10923 bfd_vma dest, off;
10924 int size;
10925 Elf_Internal_Rela *r;
10926 asection *plt;
10927
10928 /* Massage our args to the form they really have. */
10929 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10930 info = in_arg;
10931
10932 htab = ppc_hash_table (info);
10933 if (htab == NULL)
10934 return FALSE;
10935
10936 /* Make a note of the offset within the stubs for this entry. */
10937 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10938 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10939
10940 htab->stub_count[stub_entry->stub_type - 1] += 1;
10941 switch (stub_entry->stub_type)
10942 {
10943 case ppc_stub_long_branch:
10944 case ppc_stub_long_branch_r2off:
10945 /* Branches are relative. This is where we are going to. */
10946 dest = (stub_entry->target_value
10947 + stub_entry->target_section->output_offset
10948 + stub_entry->target_section->output_section->vma);
10949 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10950 off = dest;
10951
10952 /* And this is where we are coming from. */
10953 off -= (stub_entry->stub_offset
10954 + stub_entry->group->stub_sec->output_offset
10955 + stub_entry->group->stub_sec->output_section->vma);
10956
10957 size = 4;
10958 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10959 {
10960 bfd_vma r2off = get_r2off (info, stub_entry);
10961
10962 if (r2off == (bfd_vma) -1)
10963 {
10964 htab->stub_error = TRUE;
10965 return FALSE;
10966 }
10967 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10968 loc += 4;
10969 size = 8;
10970 if (PPC_HA (r2off) != 0)
10971 {
10972 bfd_put_32 (htab->params->stub_bfd,
10973 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10974 loc += 4;
10975 size += 4;
10976 }
10977 if (PPC_LO (r2off) != 0)
10978 {
10979 bfd_put_32 (htab->params->stub_bfd,
10980 ADDI_R2_R2 | PPC_LO (r2off), loc);
10981 loc += 4;
10982 size += 4;
10983 }
10984 off -= size - 4;
10985 }
10986 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10987
10988 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10989 {
10990 info->callbacks->einfo
10991 (_("%P: long branch stub `%s' offset overflow\n"),
10992 stub_entry->root.string);
10993 htab->stub_error = TRUE;
10994 return FALSE;
10995 }
10996
10997 if (info->emitrelocations)
10998 {
10999 r = get_relocs (stub_entry->group->stub_sec, 1);
11000 if (r == NULL)
11001 return FALSE;
11002 r->r_offset = loc - stub_entry->group->stub_sec->contents;
11003 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
11004 r->r_addend = dest;
11005 if (stub_entry->h != NULL)
11006 {
11007 struct elf_link_hash_entry **hashes;
11008 unsigned long symndx;
11009 struct ppc_link_hash_entry *h;
11010
11011 hashes = elf_sym_hashes (htab->params->stub_bfd);
11012 if (hashes == NULL)
11013 {
11014 bfd_size_type hsize;
11015
11016 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
11017 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
11018 if (hashes == NULL)
11019 return FALSE;
11020 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11021 htab->stub_globals = 1;
11022 }
11023 symndx = htab->stub_globals++;
11024 h = stub_entry->h;
11025 hashes[symndx] = &h->elf;
11026 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11027 if (h->oh != NULL && h->oh->is_func)
11028 h = ppc_follow_link (h->oh);
11029 if (h->elf.root.u.def.section != stub_entry->target_section)
11030 /* H is an opd symbol. The addend must be zero. */
11031 r->r_addend = 0;
11032 else
11033 {
11034 off = (h->elf.root.u.def.value
11035 + h->elf.root.u.def.section->output_offset
11036 + h->elf.root.u.def.section->output_section->vma);
11037 r->r_addend -= off;
11038 }
11039 }
11040 }
11041 break;
11042
11043 case ppc_stub_plt_branch:
11044 case ppc_stub_plt_branch_r2off:
11045 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11046 stub_entry->root.string + 9,
11047 FALSE, FALSE);
11048 if (br_entry == NULL)
11049 {
11050 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
11051 stub_entry->root.string);
11052 htab->stub_error = TRUE;
11053 return FALSE;
11054 }
11055
11056 dest = (stub_entry->target_value
11057 + stub_entry->target_section->output_offset
11058 + stub_entry->target_section->output_section->vma);
11059 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11060 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11061
11062 bfd_put_64 (htab->brlt->owner, dest,
11063 htab->brlt->contents + br_entry->offset);
11064
11065 if (br_entry->iter == htab->stub_iteration)
11066 {
11067 br_entry->iter = 0;
11068
11069 if (htab->relbrlt != NULL)
11070 {
11071 /* Create a reloc for the branch lookup table entry. */
11072 Elf_Internal_Rela rela;
11073 bfd_byte *rl;
11074
11075 rela.r_offset = (br_entry->offset
11076 + htab->brlt->output_offset
11077 + htab->brlt->output_section->vma);
11078 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11079 rela.r_addend = dest;
11080
11081 rl = htab->relbrlt->contents;
11082 rl += (htab->relbrlt->reloc_count++
11083 * sizeof (Elf64_External_Rela));
11084 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11085 }
11086 else if (info->emitrelocations)
11087 {
11088 r = get_relocs (htab->brlt, 1);
11089 if (r == NULL)
11090 return FALSE;
11091 /* brlt, being SEC_LINKER_CREATED does not go through the
11092 normal reloc processing. Symbols and offsets are not
11093 translated from input file to output file form, so
11094 set up the offset per the output file. */
11095 r->r_offset = (br_entry->offset
11096 + htab->brlt->output_offset
11097 + htab->brlt->output_section->vma);
11098 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11099 r->r_addend = dest;
11100 }
11101 }
11102
11103 dest = (br_entry->offset
11104 + htab->brlt->output_offset
11105 + htab->brlt->output_section->vma);
11106
11107 off = (dest
11108 - elf_gp (htab->brlt->output_section->owner)
11109 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11110
11111 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11112 {
11113 info->callbacks->einfo
11114 (_("%P: linkage table error against `%T'\n"),
11115 stub_entry->root.string);
11116 bfd_set_error (bfd_error_bad_value);
11117 htab->stub_error = TRUE;
11118 return FALSE;
11119 }
11120
11121 if (info->emitrelocations)
11122 {
11123 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11124 if (r == NULL)
11125 return FALSE;
11126 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11127 if (bfd_big_endian (info->output_bfd))
11128 r[0].r_offset += 2;
11129 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11130 r[0].r_offset += 4;
11131 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11132 r[0].r_addend = dest;
11133 if (PPC_HA (off) != 0)
11134 {
11135 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11136 r[1].r_offset = r[0].r_offset + 4;
11137 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11138 r[1].r_addend = r[0].r_addend;
11139 }
11140 }
11141
11142 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11143 {
11144 if (PPC_HA (off) != 0)
11145 {
11146 size = 16;
11147 bfd_put_32 (htab->params->stub_bfd,
11148 ADDIS_R12_R2 | PPC_HA (off), loc);
11149 loc += 4;
11150 bfd_put_32 (htab->params->stub_bfd,
11151 LD_R12_0R12 | PPC_LO (off), loc);
11152 }
11153 else
11154 {
11155 size = 12;
11156 bfd_put_32 (htab->params->stub_bfd,
11157 LD_R12_0R2 | PPC_LO (off), loc);
11158 }
11159 }
11160 else
11161 {
11162 bfd_vma r2off = get_r2off (info, stub_entry);
11163
11164 if (r2off == (bfd_vma) -1)
11165 {
11166 htab->stub_error = TRUE;
11167 return FALSE;
11168 }
11169
11170 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11171 loc += 4;
11172 size = 16;
11173 if (PPC_HA (off) != 0)
11174 {
11175 size += 4;
11176 bfd_put_32 (htab->params->stub_bfd,
11177 ADDIS_R12_R2 | PPC_HA (off), loc);
11178 loc += 4;
11179 bfd_put_32 (htab->params->stub_bfd,
11180 LD_R12_0R12 | PPC_LO (off), loc);
11181 }
11182 else
11183 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11184
11185 if (PPC_HA (r2off) != 0)
11186 {
11187 size += 4;
11188 loc += 4;
11189 bfd_put_32 (htab->params->stub_bfd,
11190 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11191 }
11192 if (PPC_LO (r2off) != 0)
11193 {
11194 size += 4;
11195 loc += 4;
11196 bfd_put_32 (htab->params->stub_bfd,
11197 ADDI_R2_R2 | PPC_LO (r2off), loc);
11198 }
11199 }
11200 loc += 4;
11201 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11202 loc += 4;
11203 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11204 break;
11205
11206 case ppc_stub_plt_call:
11207 case ppc_stub_plt_call_r2save:
11208 if (stub_entry->h != NULL
11209 && stub_entry->h->is_func_descriptor
11210 && stub_entry->h->oh != NULL)
11211 {
11212 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11213
11214 /* If the old-ABI "dot-symbol" is undefined make it weak so
11215 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11216 if (fh->elf.root.type == bfd_link_hash_undefined
11217 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11218 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11219 fh->elf.root.type = bfd_link_hash_undefweak;
11220 }
11221
11222 /* Now build the stub. */
11223 dest = stub_entry->plt_ent->plt.offset & ~1;
11224 if (dest >= (bfd_vma) -2)
11225 abort ();
11226
11227 plt = htab->elf.splt;
11228 if (!htab->elf.dynamic_sections_created
11229 || stub_entry->h == NULL
11230 || stub_entry->h->elf.dynindx == -1)
11231 plt = htab->elf.iplt;
11232
11233 dest += plt->output_offset + plt->output_section->vma;
11234
11235 if (stub_entry->h == NULL
11236 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11237 {
11238 Elf_Internal_Rela rela;
11239 bfd_byte *rl;
11240
11241 rela.r_offset = dest;
11242 if (htab->opd_abi)
11243 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11244 else
11245 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11246 rela.r_addend = (stub_entry->target_value
11247 + stub_entry->target_section->output_offset
11248 + stub_entry->target_section->output_section->vma);
11249
11250 rl = (htab->elf.irelplt->contents
11251 + (htab->elf.irelplt->reloc_count++
11252 * sizeof (Elf64_External_Rela)));
11253 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11254 stub_entry->plt_ent->plt.offset |= 1;
11255 htab->local_ifunc_resolver = 1;
11256 }
11257
11258 off = (dest
11259 - elf_gp (plt->output_section->owner)
11260 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11261
11262 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11263 {
11264 info->callbacks->einfo
11265 /* xgettext:c-format */
11266 (_("%P: linkage table error against `%T'\n"),
11267 stub_entry->h != NULL
11268 ? stub_entry->h->elf.root.root.string
11269 : "<local sym>");
11270 bfd_set_error (bfd_error_bad_value);
11271 htab->stub_error = TRUE;
11272 return FALSE;
11273 }
11274
11275 if (htab->params->plt_stub_align != 0)
11276 {
11277 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11278
11279 stub_entry->group->stub_sec->size += pad;
11280 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11281 loc += pad;
11282 }
11283
11284 r = NULL;
11285 if (info->emitrelocations)
11286 {
11287 r = get_relocs (stub_entry->group->stub_sec,
11288 ((PPC_HA (off) != 0)
11289 + (htab->opd_abi
11290 ? 2 + (htab->params->plt_static_chain
11291 && PPC_HA (off + 16) == PPC_HA (off))
11292 : 1)));
11293 if (r == NULL)
11294 return FALSE;
11295 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11296 if (bfd_big_endian (info->output_bfd))
11297 r[0].r_offset += 2;
11298 r[0].r_addend = dest;
11299 }
11300 if (stub_entry->h != NULL
11301 && (stub_entry->h == htab->tls_get_addr_fd
11302 || stub_entry->h == htab->tls_get_addr)
11303 && htab->params->tls_get_addr_opt)
11304 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11305 else
11306 p = build_plt_stub (htab, stub_entry, loc, off, r);
11307 size = p - loc;
11308 break;
11309
11310 case ppc_stub_save_res:
11311 return TRUE;
11312
11313 default:
11314 BFD_FAIL ();
11315 return FALSE;
11316 }
11317
11318 stub_entry->group->stub_sec->size += size;
11319
11320 if (htab->params->emit_stub_syms)
11321 {
11322 struct elf_link_hash_entry *h;
11323 size_t len1, len2;
11324 char *name;
11325 const char *const stub_str[] = { "long_branch",
11326 "long_branch_r2off",
11327 "plt_branch",
11328 "plt_branch_r2off",
11329 "plt_call",
11330 "plt_call" };
11331
11332 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11333 len2 = strlen (stub_entry->root.string);
11334 name = bfd_malloc (len1 + len2 + 2);
11335 if (name == NULL)
11336 return FALSE;
11337 memcpy (name, stub_entry->root.string, 9);
11338 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11339 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11340 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11341 if (h == NULL)
11342 return FALSE;
11343 if (h->root.type == bfd_link_hash_new)
11344 {
11345 h->root.type = bfd_link_hash_defined;
11346 h->root.u.def.section = stub_entry->group->stub_sec;
11347 h->root.u.def.value = stub_entry->stub_offset;
11348 h->ref_regular = 1;
11349 h->def_regular = 1;
11350 h->ref_regular_nonweak = 1;
11351 h->forced_local = 1;
11352 h->non_elf = 0;
11353 h->root.linker_def = 1;
11354 }
11355 }
11356
11357 return TRUE;
11358 }
11359
11360 /* As above, but don't actually build the stub. Just bump offset so
11361 we know stub section sizes, and select plt_branch stubs where
11362 long_branch stubs won't do. */
11363
11364 static bfd_boolean
11365 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11366 {
11367 struct ppc_stub_hash_entry *stub_entry;
11368 struct bfd_link_info *info;
11369 struct ppc_link_hash_table *htab;
11370 bfd_vma off;
11371 int size;
11372
11373 /* Massage our args to the form they really have. */
11374 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11375 info = in_arg;
11376
11377 htab = ppc_hash_table (info);
11378 if (htab == NULL)
11379 return FALSE;
11380
11381 if (stub_entry->h != NULL
11382 && stub_entry->h->save_res
11383 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11384 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11385 {
11386 /* Don't make stubs to out-of-line register save/restore
11387 functions. Instead, emit copies of the functions. */
11388 stub_entry->group->needs_save_res = 1;
11389 stub_entry->stub_type = ppc_stub_save_res;
11390 return TRUE;
11391 }
11392
11393 if (stub_entry->stub_type == ppc_stub_plt_call
11394 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11395 {
11396 asection *plt;
11397 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11398 if (off >= (bfd_vma) -2)
11399 abort ();
11400 plt = htab->elf.splt;
11401 if (!htab->elf.dynamic_sections_created
11402 || stub_entry->h == NULL
11403 || stub_entry->h->elf.dynindx == -1)
11404 plt = htab->elf.iplt;
11405 off += (plt->output_offset
11406 + plt->output_section->vma
11407 - elf_gp (plt->output_section->owner)
11408 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11409
11410 size = plt_stub_size (htab, stub_entry, off);
11411 if (stub_entry->h != NULL
11412 && (stub_entry->h == htab->tls_get_addr_fd
11413 || stub_entry->h == htab->tls_get_addr)
11414 && htab->params->tls_get_addr_opt
11415 && (ALWAYS_EMIT_R2SAVE
11416 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11417 stub_entry->group->tls_get_addr_opt_bctrl
11418 = stub_entry->group->stub_sec->size + size - 5 * 4;
11419
11420 if (htab->params->plt_stub_align)
11421 size += plt_stub_pad (htab, stub_entry, off);
11422 if (info->emitrelocations)
11423 {
11424 stub_entry->group->stub_sec->reloc_count
11425 += ((PPC_HA (off) != 0)
11426 + (htab->opd_abi
11427 ? 2 + (htab->params->plt_static_chain
11428 && PPC_HA (off + 16) == PPC_HA (off))
11429 : 1));
11430 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11431 }
11432 }
11433 else
11434 {
11435 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11436 variants. */
11437 bfd_vma r2off = 0;
11438 bfd_vma local_off = 0;
11439
11440 off = (stub_entry->target_value
11441 + stub_entry->target_section->output_offset
11442 + stub_entry->target_section->output_section->vma);
11443 off -= (stub_entry->group->stub_sec->size
11444 + stub_entry->group->stub_sec->output_offset
11445 + stub_entry->group->stub_sec->output_section->vma);
11446
11447 /* Reset the stub type from the plt variant in case we now
11448 can reach with a shorter stub. */
11449 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11450 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11451
11452 size = 4;
11453 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11454 {
11455 r2off = get_r2off (info, stub_entry);
11456 if (r2off == (bfd_vma) -1)
11457 {
11458 htab->stub_error = TRUE;
11459 return FALSE;
11460 }
11461 size = 8;
11462 if (PPC_HA (r2off) != 0)
11463 size += 4;
11464 if (PPC_LO (r2off) != 0)
11465 size += 4;
11466 off -= size - 4;
11467 }
11468
11469 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11470
11471 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11472 Do the same for -R objects without function descriptors. */
11473 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11474 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11475 && r2off == 0
11476 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11477 {
11478 struct ppc_branch_hash_entry *br_entry;
11479
11480 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11481 stub_entry->root.string + 9,
11482 TRUE, FALSE);
11483 if (br_entry == NULL)
11484 {
11485 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11486 stub_entry->root.string);
11487 htab->stub_error = TRUE;
11488 return FALSE;
11489 }
11490
11491 if (br_entry->iter != htab->stub_iteration)
11492 {
11493 br_entry->iter = htab->stub_iteration;
11494 br_entry->offset = htab->brlt->size;
11495 htab->brlt->size += 8;
11496
11497 if (htab->relbrlt != NULL)
11498 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11499 else if (info->emitrelocations)
11500 {
11501 htab->brlt->reloc_count += 1;
11502 htab->brlt->flags |= SEC_RELOC;
11503 }
11504 }
11505
11506 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11507 off = (br_entry->offset
11508 + htab->brlt->output_offset
11509 + htab->brlt->output_section->vma
11510 - elf_gp (htab->brlt->output_section->owner)
11511 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11512
11513 if (info->emitrelocations)
11514 {
11515 stub_entry->group->stub_sec->reloc_count
11516 += 1 + (PPC_HA (off) != 0);
11517 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11518 }
11519
11520 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11521 {
11522 size = 12;
11523 if (PPC_HA (off) != 0)
11524 size = 16;
11525 }
11526 else
11527 {
11528 size = 16;
11529 if (PPC_HA (off) != 0)
11530 size += 4;
11531
11532 if (PPC_HA (r2off) != 0)
11533 size += 4;
11534 if (PPC_LO (r2off) != 0)
11535 size += 4;
11536 }
11537 }
11538 else if (info->emitrelocations)
11539 {
11540 stub_entry->group->stub_sec->reloc_count += 1;
11541 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11542 }
11543 }
11544
11545 stub_entry->group->stub_sec->size += size;
11546 return TRUE;
11547 }
11548
11549 /* Set up various things so that we can make a list of input sections
11550 for each output section included in the link. Returns -1 on error,
11551 0 when no stubs will be needed, and 1 on success. */
11552
11553 int
11554 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11555 {
11556 unsigned int id;
11557 bfd_size_type amt;
11558 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11559
11560 if (htab == NULL)
11561 return -1;
11562
11563 htab->sec_info_arr_size = bfd_get_next_section_id ();
11564 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11565 htab->sec_info = bfd_zmalloc (amt);
11566 if (htab->sec_info == NULL)
11567 return -1;
11568
11569 /* Set toc_off for com, und, abs and ind sections. */
11570 for (id = 0; id < 3; id++)
11571 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11572
11573 return 1;
11574 }
11575
11576 /* Set up for first pass at multitoc partitioning. */
11577
11578 void
11579 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11580 {
11581 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11582
11583 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11584 htab->toc_bfd = NULL;
11585 htab->toc_first_sec = NULL;
11586 }
11587
11588 /* The linker repeatedly calls this function for each TOC input section
11589 and linker generated GOT section. Group input bfds such that the toc
11590 within a group is less than 64k in size. */
11591
11592 bfd_boolean
11593 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11594 {
11595 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11596 bfd_vma addr, off, limit;
11597
11598 if (htab == NULL)
11599 return FALSE;
11600
11601 if (!htab->second_toc_pass)
11602 {
11603 /* Keep track of the first .toc or .got section for this input bfd. */
11604 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11605
11606 if (new_bfd)
11607 {
11608 htab->toc_bfd = isec->owner;
11609 htab->toc_first_sec = isec;
11610 }
11611
11612 addr = isec->output_offset + isec->output_section->vma;
11613 off = addr - htab->toc_curr;
11614 limit = 0x80008000;
11615 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11616 limit = 0x10000;
11617 if (off + isec->size > limit)
11618 {
11619 addr = (htab->toc_first_sec->output_offset
11620 + htab->toc_first_sec->output_section->vma);
11621 htab->toc_curr = addr;
11622 htab->toc_curr &= -TOC_BASE_ALIGN;
11623 }
11624
11625 /* toc_curr is the base address of this toc group. Set elf_gp
11626 for the input section to be the offset relative to the
11627 output toc base plus 0x8000. Making the input elf_gp an
11628 offset allows us to move the toc as a whole without
11629 recalculating input elf_gp. */
11630 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11631 off += TOC_BASE_OFF;
11632
11633 /* Die if someone uses a linker script that doesn't keep input
11634 file .toc and .got together. */
11635 if (new_bfd
11636 && elf_gp (isec->owner) != 0
11637 && elf_gp (isec->owner) != off)
11638 return FALSE;
11639
11640 elf_gp (isec->owner) = off;
11641 return TRUE;
11642 }
11643
11644 /* During the second pass toc_first_sec points to the start of
11645 a toc group, and toc_curr is used to track the old elf_gp.
11646 We use toc_bfd to ensure we only look at each bfd once. */
11647 if (htab->toc_bfd == isec->owner)
11648 return TRUE;
11649 htab->toc_bfd = isec->owner;
11650
11651 if (htab->toc_first_sec == NULL
11652 || htab->toc_curr != elf_gp (isec->owner))
11653 {
11654 htab->toc_curr = elf_gp (isec->owner);
11655 htab->toc_first_sec = isec;
11656 }
11657 addr = (htab->toc_first_sec->output_offset
11658 + htab->toc_first_sec->output_section->vma);
11659 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11660 elf_gp (isec->owner) = off;
11661
11662 return TRUE;
11663 }
11664
11665 /* Called via elf_link_hash_traverse to merge GOT entries for global
11666 symbol H. */
11667
11668 static bfd_boolean
11669 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11670 {
11671 if (h->root.type == bfd_link_hash_indirect)
11672 return TRUE;
11673
11674 merge_got_entries (&h->got.glist);
11675
11676 return TRUE;
11677 }
11678
11679 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11680 symbol H. */
11681
11682 static bfd_boolean
11683 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11684 {
11685 struct got_entry *gent;
11686
11687 if (h->root.type == bfd_link_hash_indirect)
11688 return TRUE;
11689
11690 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11691 if (!gent->is_indirect)
11692 allocate_got (h, (struct bfd_link_info *) inf, gent);
11693 return TRUE;
11694 }
11695
11696 /* Called on the first multitoc pass after the last call to
11697 ppc64_elf_next_toc_section. This function removes duplicate GOT
11698 entries. */
11699
11700 bfd_boolean
11701 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11702 {
11703 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11704 struct bfd *ibfd, *ibfd2;
11705 bfd_boolean done_something;
11706
11707 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11708
11709 if (!htab->do_multi_toc)
11710 return FALSE;
11711
11712 /* Merge global sym got entries within a toc group. */
11713 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11714
11715 /* And tlsld_got. */
11716 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11717 {
11718 struct got_entry *ent, *ent2;
11719
11720 if (!is_ppc64_elf (ibfd))
11721 continue;
11722
11723 ent = ppc64_tlsld_got (ibfd);
11724 if (!ent->is_indirect
11725 && ent->got.offset != (bfd_vma) -1)
11726 {
11727 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11728 {
11729 if (!is_ppc64_elf (ibfd2))
11730 continue;
11731
11732 ent2 = ppc64_tlsld_got (ibfd2);
11733 if (!ent2->is_indirect
11734 && ent2->got.offset != (bfd_vma) -1
11735 && elf_gp (ibfd2) == elf_gp (ibfd))
11736 {
11737 ent2->is_indirect = TRUE;
11738 ent2->got.ent = ent;
11739 }
11740 }
11741 }
11742 }
11743
11744 /* Zap sizes of got sections. */
11745 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11746 htab->elf.irelplt->size -= htab->got_reli_size;
11747 htab->got_reli_size = 0;
11748
11749 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11750 {
11751 asection *got, *relgot;
11752
11753 if (!is_ppc64_elf (ibfd))
11754 continue;
11755
11756 got = ppc64_elf_tdata (ibfd)->got;
11757 if (got != NULL)
11758 {
11759 got->rawsize = got->size;
11760 got->size = 0;
11761 relgot = ppc64_elf_tdata (ibfd)->relgot;
11762 relgot->rawsize = relgot->size;
11763 relgot->size = 0;
11764 }
11765 }
11766
11767 /* Now reallocate the got, local syms first. We don't need to
11768 allocate section contents again since we never increase size. */
11769 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11770 {
11771 struct got_entry **lgot_ents;
11772 struct got_entry **end_lgot_ents;
11773 struct plt_entry **local_plt;
11774 struct plt_entry **end_local_plt;
11775 unsigned char *lgot_masks;
11776 bfd_size_type locsymcount;
11777 Elf_Internal_Shdr *symtab_hdr;
11778 asection *s;
11779
11780 if (!is_ppc64_elf (ibfd))
11781 continue;
11782
11783 lgot_ents = elf_local_got_ents (ibfd);
11784 if (!lgot_ents)
11785 continue;
11786
11787 symtab_hdr = &elf_symtab_hdr (ibfd);
11788 locsymcount = symtab_hdr->sh_info;
11789 end_lgot_ents = lgot_ents + locsymcount;
11790 local_plt = (struct plt_entry **) end_lgot_ents;
11791 end_local_plt = local_plt + locsymcount;
11792 lgot_masks = (unsigned char *) end_local_plt;
11793 s = ppc64_elf_tdata (ibfd)->got;
11794 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11795 {
11796 struct got_entry *ent;
11797
11798 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11799 {
11800 unsigned int ent_size = 8;
11801 unsigned int rel_size = sizeof (Elf64_External_Rela);
11802
11803 ent->got.offset = s->size;
11804 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11805 {
11806 ent_size *= 2;
11807 rel_size *= 2;
11808 }
11809 s->size += ent_size;
11810 if ((*lgot_masks & PLT_IFUNC) != 0)
11811 {
11812 htab->elf.irelplt->size += rel_size;
11813 htab->got_reli_size += rel_size;
11814 }
11815 else if (bfd_link_pic (info))
11816 {
11817 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11818 srel->size += rel_size;
11819 }
11820 }
11821 }
11822 }
11823
11824 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11825
11826 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11827 {
11828 struct got_entry *ent;
11829
11830 if (!is_ppc64_elf (ibfd))
11831 continue;
11832
11833 ent = ppc64_tlsld_got (ibfd);
11834 if (!ent->is_indirect
11835 && ent->got.offset != (bfd_vma) -1)
11836 {
11837 asection *s = ppc64_elf_tdata (ibfd)->got;
11838 ent->got.offset = s->size;
11839 s->size += 16;
11840 if (bfd_link_pic (info))
11841 {
11842 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11843 srel->size += sizeof (Elf64_External_Rela);
11844 }
11845 }
11846 }
11847
11848 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11849 if (!done_something)
11850 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11851 {
11852 asection *got;
11853
11854 if (!is_ppc64_elf (ibfd))
11855 continue;
11856
11857 got = ppc64_elf_tdata (ibfd)->got;
11858 if (got != NULL)
11859 {
11860 done_something = got->rawsize != got->size;
11861 if (done_something)
11862 break;
11863 }
11864 }
11865
11866 if (done_something)
11867 (*htab->params->layout_sections_again) ();
11868
11869 /* Set up for second pass over toc sections to recalculate elf_gp
11870 on input sections. */
11871 htab->toc_bfd = NULL;
11872 htab->toc_first_sec = NULL;
11873 htab->second_toc_pass = TRUE;
11874 return done_something;
11875 }
11876
11877 /* Called after second pass of multitoc partitioning. */
11878
11879 void
11880 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11881 {
11882 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11883
11884 /* After the second pass, toc_curr tracks the TOC offset used
11885 for code sections below in ppc64_elf_next_input_section. */
11886 htab->toc_curr = TOC_BASE_OFF;
11887 }
11888
11889 /* No toc references were found in ISEC. If the code in ISEC makes no
11890 calls, then there's no need to use toc adjusting stubs when branching
11891 into ISEC. Actually, indirect calls from ISEC are OK as they will
11892 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11893 needed, and 2 if a cyclical call-graph was found but no other reason
11894 for a stub was detected. If called from the top level, a return of
11895 2 means the same as a return of 0. */
11896
11897 static int
11898 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11899 {
11900 int ret;
11901
11902 /* Mark this section as checked. */
11903 isec->call_check_done = 1;
11904
11905 /* We know none of our code bearing sections will need toc stubs. */
11906 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11907 return 0;
11908
11909 if (isec->size == 0)
11910 return 0;
11911
11912 if (isec->output_section == NULL)
11913 return 0;
11914
11915 ret = 0;
11916 if (isec->reloc_count != 0)
11917 {
11918 Elf_Internal_Rela *relstart, *rel;
11919 Elf_Internal_Sym *local_syms;
11920 struct ppc_link_hash_table *htab;
11921
11922 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11923 info->keep_memory);
11924 if (relstart == NULL)
11925 return -1;
11926
11927 /* Look for branches to outside of this section. */
11928 local_syms = NULL;
11929 htab = ppc_hash_table (info);
11930 if (htab == NULL)
11931 return -1;
11932
11933 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11934 {
11935 enum elf_ppc64_reloc_type r_type;
11936 unsigned long r_symndx;
11937 struct elf_link_hash_entry *h;
11938 struct ppc_link_hash_entry *eh;
11939 Elf_Internal_Sym *sym;
11940 asection *sym_sec;
11941 struct _opd_sec_data *opd;
11942 bfd_vma sym_value;
11943 bfd_vma dest;
11944
11945 r_type = ELF64_R_TYPE (rel->r_info);
11946 if (r_type != R_PPC64_REL24
11947 && r_type != R_PPC64_REL14
11948 && r_type != R_PPC64_REL14_BRTAKEN
11949 && r_type != R_PPC64_REL14_BRNTAKEN)
11950 continue;
11951
11952 r_symndx = ELF64_R_SYM (rel->r_info);
11953 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11954 isec->owner))
11955 {
11956 ret = -1;
11957 break;
11958 }
11959
11960 /* Calls to dynamic lib functions go through a plt call stub
11961 that uses r2. */
11962 eh = (struct ppc_link_hash_entry *) h;
11963 if (eh != NULL
11964 && (eh->elf.plt.plist != NULL
11965 || (eh->oh != NULL
11966 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11967 {
11968 ret = 1;
11969 break;
11970 }
11971
11972 if (sym_sec == NULL)
11973 /* Ignore other undefined symbols. */
11974 continue;
11975
11976 /* Assume branches to other sections not included in the
11977 link need stubs too, to cover -R and absolute syms. */
11978 if (sym_sec->output_section == NULL)
11979 {
11980 ret = 1;
11981 break;
11982 }
11983
11984 if (h == NULL)
11985 sym_value = sym->st_value;
11986 else
11987 {
11988 if (h->root.type != bfd_link_hash_defined
11989 && h->root.type != bfd_link_hash_defweak)
11990 abort ();
11991 sym_value = h->root.u.def.value;
11992 }
11993 sym_value += rel->r_addend;
11994
11995 /* If this branch reloc uses an opd sym, find the code section. */
11996 opd = get_opd_info (sym_sec);
11997 if (opd != NULL)
11998 {
11999 if (h == NULL && opd->adjust != NULL)
12000 {
12001 long adjust;
12002
12003 adjust = opd->adjust[OPD_NDX (sym_value)];
12004 if (adjust == -1)
12005 /* Assume deleted functions won't ever be called. */
12006 continue;
12007 sym_value += adjust;
12008 }
12009
12010 dest = opd_entry_value (sym_sec, sym_value,
12011 &sym_sec, NULL, FALSE);
12012 if (dest == (bfd_vma) -1)
12013 continue;
12014 }
12015 else
12016 dest = (sym_value
12017 + sym_sec->output_offset
12018 + sym_sec->output_section->vma);
12019
12020 /* Ignore branch to self. */
12021 if (sym_sec == isec)
12022 continue;
12023
12024 /* If the called function uses the toc, we need a stub. */
12025 if (sym_sec->has_toc_reloc
12026 || sym_sec->makes_toc_func_call)
12027 {
12028 ret = 1;
12029 break;
12030 }
12031
12032 /* Assume any branch that needs a long branch stub might in fact
12033 need a plt_branch stub. A plt_branch stub uses r2. */
12034 else if (dest - (isec->output_offset
12035 + isec->output_section->vma
12036 + rel->r_offset) + (1 << 25)
12037 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12038 ? h->other
12039 : sym->st_other))
12040 {
12041 ret = 1;
12042 break;
12043 }
12044
12045 /* If calling back to a section in the process of being
12046 tested, we can't say for sure that no toc adjusting stubs
12047 are needed, so don't return zero. */
12048 else if (sym_sec->call_check_in_progress)
12049 ret = 2;
12050
12051 /* Branches to another section that itself doesn't have any TOC
12052 references are OK. Recursively call ourselves to check. */
12053 else if (!sym_sec->call_check_done)
12054 {
12055 int recur;
12056
12057 /* Mark current section as indeterminate, so that other
12058 sections that call back to current won't be marked as
12059 known. */
12060 isec->call_check_in_progress = 1;
12061 recur = toc_adjusting_stub_needed (info, sym_sec);
12062 isec->call_check_in_progress = 0;
12063
12064 if (recur != 0)
12065 {
12066 ret = recur;
12067 if (recur != 2)
12068 break;
12069 }
12070 }
12071 }
12072
12073 if (local_syms != NULL
12074 && (elf_symtab_hdr (isec->owner).contents
12075 != (unsigned char *) local_syms))
12076 free (local_syms);
12077 if (elf_section_data (isec)->relocs != relstart)
12078 free (relstart);
12079 }
12080
12081 if ((ret & 1) == 0
12082 && isec->map_head.s != NULL
12083 && (strcmp (isec->output_section->name, ".init") == 0
12084 || strcmp (isec->output_section->name, ".fini") == 0))
12085 {
12086 if (isec->map_head.s->has_toc_reloc
12087 || isec->map_head.s->makes_toc_func_call)
12088 ret = 1;
12089 else if (!isec->map_head.s->call_check_done)
12090 {
12091 int recur;
12092 isec->call_check_in_progress = 1;
12093 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12094 isec->call_check_in_progress = 0;
12095 if (recur != 0)
12096 ret = recur;
12097 }
12098 }
12099
12100 if (ret == 1)
12101 isec->makes_toc_func_call = 1;
12102
12103 return ret;
12104 }
12105
12106 /* The linker repeatedly calls this function for each input section,
12107 in the order that input sections are linked into output sections.
12108 Build lists of input sections to determine groupings between which
12109 we may insert linker stubs. */
12110
12111 bfd_boolean
12112 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12113 {
12114 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12115
12116 if (htab == NULL)
12117 return FALSE;
12118
12119 if ((isec->output_section->flags & SEC_CODE) != 0
12120 && isec->output_section->id < htab->sec_info_arr_size)
12121 {
12122 /* This happens to make the list in reverse order,
12123 which is what we want. */
12124 htab->sec_info[isec->id].u.list
12125 = htab->sec_info[isec->output_section->id].u.list;
12126 htab->sec_info[isec->output_section->id].u.list = isec;
12127 }
12128
12129 if (htab->multi_toc_needed)
12130 {
12131 /* Analyse sections that aren't already flagged as needing a
12132 valid toc pointer. Exclude .fixup for the linux kernel.
12133 .fixup contains branches, but only back to the function that
12134 hit an exception. */
12135 if (!(isec->has_toc_reloc
12136 || (isec->flags & SEC_CODE) == 0
12137 || strcmp (isec->name, ".fixup") == 0
12138 || isec->call_check_done))
12139 {
12140 if (toc_adjusting_stub_needed (info, isec) < 0)
12141 return FALSE;
12142 }
12143 /* Make all sections use the TOC assigned for this object file.
12144 This will be wrong for pasted sections; We fix that in
12145 check_pasted_section(). */
12146 if (elf_gp (isec->owner) != 0)
12147 htab->toc_curr = elf_gp (isec->owner);
12148 }
12149
12150 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12151 return TRUE;
12152 }
12153
12154 /* Check that all .init and .fini sections use the same toc, if they
12155 have toc relocs. */
12156
12157 static bfd_boolean
12158 check_pasted_section (struct bfd_link_info *info, const char *name)
12159 {
12160 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12161
12162 if (o != NULL)
12163 {
12164 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12165 bfd_vma toc_off = 0;
12166 asection *i;
12167
12168 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12169 if (i->has_toc_reloc)
12170 {
12171 if (toc_off == 0)
12172 toc_off = htab->sec_info[i->id].toc_off;
12173 else if (toc_off != htab->sec_info[i->id].toc_off)
12174 return FALSE;
12175 }
12176
12177 if (toc_off == 0)
12178 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12179 if (i->makes_toc_func_call)
12180 {
12181 toc_off = htab->sec_info[i->id].toc_off;
12182 break;
12183 }
12184
12185 /* Make sure the whole pasted function uses the same toc offset. */
12186 if (toc_off != 0)
12187 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12188 htab->sec_info[i->id].toc_off = toc_off;
12189 }
12190 return TRUE;
12191 }
12192
12193 bfd_boolean
12194 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12195 {
12196 return (check_pasted_section (info, ".init")
12197 & check_pasted_section (info, ".fini"));
12198 }
12199
12200 /* See whether we can group stub sections together. Grouping stub
12201 sections may result in fewer stubs. More importantly, we need to
12202 put all .init* and .fini* stubs at the beginning of the .init or
12203 .fini output sections respectively, because glibc splits the
12204 _init and _fini functions into multiple parts. Putting a stub in
12205 the middle of a function is not a good idea. */
12206
12207 static bfd_boolean
12208 group_sections (struct bfd_link_info *info,
12209 bfd_size_type stub_group_size,
12210 bfd_boolean stubs_always_before_branch)
12211 {
12212 struct ppc_link_hash_table *htab;
12213 asection *osec;
12214 bfd_boolean suppress_size_errors;
12215
12216 htab = ppc_hash_table (info);
12217 if (htab == NULL)
12218 return FALSE;
12219
12220 suppress_size_errors = FALSE;
12221 if (stub_group_size == 1)
12222 {
12223 /* Default values. */
12224 if (stubs_always_before_branch)
12225 stub_group_size = 0x1e00000;
12226 else
12227 stub_group_size = 0x1c00000;
12228 suppress_size_errors = TRUE;
12229 }
12230
12231 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12232 {
12233 asection *tail;
12234
12235 if (osec->id >= htab->sec_info_arr_size)
12236 continue;
12237
12238 tail = htab->sec_info[osec->id].u.list;
12239 while (tail != NULL)
12240 {
12241 asection *curr;
12242 asection *prev;
12243 bfd_size_type total;
12244 bfd_boolean big_sec;
12245 bfd_vma curr_toc;
12246 struct map_stub *group;
12247 bfd_size_type group_size;
12248
12249 curr = tail;
12250 total = tail->size;
12251 group_size = (ppc64_elf_section_data (tail) != NULL
12252 && ppc64_elf_section_data (tail)->has_14bit_branch
12253 ? stub_group_size >> 10 : stub_group_size);
12254
12255 big_sec = total > group_size;
12256 if (big_sec && !suppress_size_errors)
12257 /* xgettext:c-format */
12258 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12259 tail->owner, tail);
12260 curr_toc = htab->sec_info[tail->id].toc_off;
12261
12262 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12263 && ((total += curr->output_offset - prev->output_offset)
12264 < (ppc64_elf_section_data (prev) != NULL
12265 && ppc64_elf_section_data (prev)->has_14bit_branch
12266 ? (group_size = stub_group_size >> 10) : group_size))
12267 && htab->sec_info[prev->id].toc_off == curr_toc)
12268 curr = prev;
12269
12270 /* OK, the size from the start of CURR to the end is less
12271 than group_size and thus can be handled by one stub
12272 section. (or the tail section is itself larger than
12273 group_size, in which case we may be toast.) We should
12274 really be keeping track of the total size of stubs added
12275 here, as stubs contribute to the final output section
12276 size. That's a little tricky, and this way will only
12277 break if stubs added make the total size more than 2^25,
12278 ie. for the default stub_group_size, if stubs total more
12279 than 2097152 bytes, or nearly 75000 plt call stubs. */
12280 group = bfd_alloc (curr->owner, sizeof (*group));
12281 if (group == NULL)
12282 return FALSE;
12283 group->link_sec = curr;
12284 group->stub_sec = NULL;
12285 group->needs_save_res = 0;
12286 group->tls_get_addr_opt_bctrl = -1u;
12287 group->next = htab->group;
12288 htab->group = group;
12289 do
12290 {
12291 prev = htab->sec_info[tail->id].u.list;
12292 /* Set up this stub group. */
12293 htab->sec_info[tail->id].u.group = group;
12294 }
12295 while (tail != curr && (tail = prev) != NULL);
12296
12297 /* But wait, there's more! Input sections up to group_size
12298 bytes before the stub section can be handled by it too.
12299 Don't do this if we have a really large section after the
12300 stubs, as adding more stubs increases the chance that
12301 branches may not reach into the stub section. */
12302 if (!stubs_always_before_branch && !big_sec)
12303 {
12304 total = 0;
12305 while (prev != NULL
12306 && ((total += tail->output_offset - prev->output_offset)
12307 < (ppc64_elf_section_data (prev) != NULL
12308 && ppc64_elf_section_data (prev)->has_14bit_branch
12309 ? (group_size = stub_group_size >> 10) : group_size))
12310 && htab->sec_info[prev->id].toc_off == curr_toc)
12311 {
12312 tail = prev;
12313 prev = htab->sec_info[tail->id].u.list;
12314 htab->sec_info[tail->id].u.group = group;
12315 }
12316 }
12317 tail = prev;
12318 }
12319 }
12320 return TRUE;
12321 }
12322
12323 static const unsigned char glink_eh_frame_cie[] =
12324 {
12325 0, 0, 0, 16, /* length. */
12326 0, 0, 0, 0, /* id. */
12327 1, /* CIE version. */
12328 'z', 'R', 0, /* Augmentation string. */
12329 4, /* Code alignment. */
12330 0x78, /* Data alignment. */
12331 65, /* RA reg. */
12332 1, /* Augmentation size. */
12333 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12334 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12335 };
12336
12337 static size_t
12338 stub_eh_frame_size (struct map_stub *group, size_t align)
12339 {
12340 size_t this_size = 17;
12341 if (group->tls_get_addr_opt_bctrl != -1u)
12342 {
12343 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12344 if (to_bctrl < 64)
12345 this_size += 1;
12346 else if (to_bctrl < 256)
12347 this_size += 2;
12348 else if (to_bctrl < 65536)
12349 this_size += 3;
12350 else
12351 this_size += 5;
12352 this_size += 6;
12353 }
12354 this_size = (this_size + align - 1) & -align;
12355 return this_size;
12356 }
12357
12358 /* Stripping output sections is normally done before dynamic section
12359 symbols have been allocated. This function is called later, and
12360 handles cases like htab->brlt which is mapped to its own output
12361 section. */
12362
12363 static void
12364 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12365 {
12366 if (isec->size == 0
12367 && isec->output_section->size == 0
12368 && !(isec->output_section->flags & SEC_KEEP)
12369 && !bfd_section_removed_from_list (info->output_bfd,
12370 isec->output_section)
12371 && elf_section_data (isec->output_section)->dynindx == 0)
12372 {
12373 isec->output_section->flags |= SEC_EXCLUDE;
12374 bfd_section_list_remove (info->output_bfd, isec->output_section);
12375 info->output_bfd->section_count--;
12376 }
12377 }
12378
12379 /* Determine and set the size of the stub section for a final link.
12380
12381 The basic idea here is to examine all the relocations looking for
12382 PC-relative calls to a target that is unreachable with a "bl"
12383 instruction. */
12384
12385 bfd_boolean
12386 ppc64_elf_size_stubs (struct bfd_link_info *info)
12387 {
12388 bfd_size_type stub_group_size;
12389 bfd_boolean stubs_always_before_branch;
12390 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12391
12392 if (htab == NULL)
12393 return FALSE;
12394
12395 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12396 htab->params->plt_thread_safe = 1;
12397 if (!htab->opd_abi)
12398 htab->params->plt_thread_safe = 0;
12399 else if (htab->params->plt_thread_safe == -1)
12400 {
12401 static const char *const thread_starter[] =
12402 {
12403 "pthread_create",
12404 /* libstdc++ */
12405 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12406 /* librt */
12407 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12408 "mq_notify", "create_timer",
12409 /* libanl */
12410 "getaddrinfo_a",
12411 /* libgomp */
12412 "GOMP_parallel",
12413 "GOMP_parallel_start",
12414 "GOMP_parallel_loop_static",
12415 "GOMP_parallel_loop_static_start",
12416 "GOMP_parallel_loop_dynamic",
12417 "GOMP_parallel_loop_dynamic_start",
12418 "GOMP_parallel_loop_guided",
12419 "GOMP_parallel_loop_guided_start",
12420 "GOMP_parallel_loop_runtime",
12421 "GOMP_parallel_loop_runtime_start",
12422 "GOMP_parallel_sections",
12423 "GOMP_parallel_sections_start",
12424 /* libgo */
12425 "__go_go",
12426 };
12427 unsigned i;
12428
12429 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12430 {
12431 struct elf_link_hash_entry *h;
12432 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12433 FALSE, FALSE, TRUE);
12434 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12435 if (htab->params->plt_thread_safe)
12436 break;
12437 }
12438 }
12439 stubs_always_before_branch = htab->params->group_size < 0;
12440 if (htab->params->group_size < 0)
12441 stub_group_size = -htab->params->group_size;
12442 else
12443 stub_group_size = htab->params->group_size;
12444
12445 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12446 return FALSE;
12447
12448 #define STUB_SHRINK_ITER 20
12449 /* Loop until no stubs added. After iteration 20 of this loop we may
12450 exit on a stub section shrinking. This is to break out of a
12451 pathological case where adding stubs on one iteration decreases
12452 section gaps (perhaps due to alignment), which then requires
12453 fewer or smaller stubs on the next iteration. */
12454
12455 while (1)
12456 {
12457 bfd *input_bfd;
12458 unsigned int bfd_indx;
12459 struct map_stub *group;
12460
12461 htab->stub_iteration += 1;
12462
12463 for (input_bfd = info->input_bfds, bfd_indx = 0;
12464 input_bfd != NULL;
12465 input_bfd = input_bfd->link.next, bfd_indx++)
12466 {
12467 Elf_Internal_Shdr *symtab_hdr;
12468 asection *section;
12469 Elf_Internal_Sym *local_syms = NULL;
12470
12471 if (!is_ppc64_elf (input_bfd))
12472 continue;
12473
12474 /* We'll need the symbol table in a second. */
12475 symtab_hdr = &elf_symtab_hdr (input_bfd);
12476 if (symtab_hdr->sh_info == 0)
12477 continue;
12478
12479 /* Walk over each section attached to the input bfd. */
12480 for (section = input_bfd->sections;
12481 section != NULL;
12482 section = section->next)
12483 {
12484 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12485
12486 /* If there aren't any relocs, then there's nothing more
12487 to do. */
12488 if ((section->flags & SEC_RELOC) == 0
12489 || (section->flags & SEC_ALLOC) == 0
12490 || (section->flags & SEC_LOAD) == 0
12491 || (section->flags & SEC_CODE) == 0
12492 || section->reloc_count == 0)
12493 continue;
12494
12495 /* If this section is a link-once section that will be
12496 discarded, then don't create any stubs. */
12497 if (section->output_section == NULL
12498 || section->output_section->owner != info->output_bfd)
12499 continue;
12500
12501 /* Get the relocs. */
12502 internal_relocs
12503 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12504 info->keep_memory);
12505 if (internal_relocs == NULL)
12506 goto error_ret_free_local;
12507
12508 /* Now examine each relocation. */
12509 irela = internal_relocs;
12510 irelaend = irela + section->reloc_count;
12511 for (; irela < irelaend; irela++)
12512 {
12513 enum elf_ppc64_reloc_type r_type;
12514 unsigned int r_indx;
12515 enum ppc_stub_type stub_type;
12516 struct ppc_stub_hash_entry *stub_entry;
12517 asection *sym_sec, *code_sec;
12518 bfd_vma sym_value, code_value;
12519 bfd_vma destination;
12520 unsigned long local_off;
12521 bfd_boolean ok_dest;
12522 struct ppc_link_hash_entry *hash;
12523 struct ppc_link_hash_entry *fdh;
12524 struct elf_link_hash_entry *h;
12525 Elf_Internal_Sym *sym;
12526 char *stub_name;
12527 const asection *id_sec;
12528 struct _opd_sec_data *opd;
12529 struct plt_entry *plt_ent;
12530
12531 r_type = ELF64_R_TYPE (irela->r_info);
12532 r_indx = ELF64_R_SYM (irela->r_info);
12533
12534 if (r_type >= R_PPC64_max)
12535 {
12536 bfd_set_error (bfd_error_bad_value);
12537 goto error_ret_free_internal;
12538 }
12539
12540 /* Only look for stubs on branch instructions. */
12541 if (r_type != R_PPC64_REL24
12542 && r_type != R_PPC64_REL14
12543 && r_type != R_PPC64_REL14_BRTAKEN
12544 && r_type != R_PPC64_REL14_BRNTAKEN)
12545 continue;
12546
12547 /* Now determine the call target, its name, value,
12548 section. */
12549 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12550 r_indx, input_bfd))
12551 goto error_ret_free_internal;
12552 hash = (struct ppc_link_hash_entry *) h;
12553
12554 ok_dest = FALSE;
12555 fdh = NULL;
12556 sym_value = 0;
12557 if (hash == NULL)
12558 {
12559 sym_value = sym->st_value;
12560 if (sym_sec != NULL
12561 && sym_sec->output_section != NULL)
12562 ok_dest = TRUE;
12563 }
12564 else if (hash->elf.root.type == bfd_link_hash_defined
12565 || hash->elf.root.type == bfd_link_hash_defweak)
12566 {
12567 sym_value = hash->elf.root.u.def.value;
12568 if (sym_sec->output_section != NULL)
12569 ok_dest = TRUE;
12570 }
12571 else if (hash->elf.root.type == bfd_link_hash_undefweak
12572 || hash->elf.root.type == bfd_link_hash_undefined)
12573 {
12574 /* Recognise an old ABI func code entry sym, and
12575 use the func descriptor sym instead if it is
12576 defined. */
12577 if (hash->elf.root.root.string[0] == '.'
12578 && hash->oh != NULL)
12579 {
12580 fdh = ppc_follow_link (hash->oh);
12581 if (fdh->elf.root.type == bfd_link_hash_defined
12582 || fdh->elf.root.type == bfd_link_hash_defweak)
12583 {
12584 sym_sec = fdh->elf.root.u.def.section;
12585 sym_value = fdh->elf.root.u.def.value;
12586 if (sym_sec->output_section != NULL)
12587 ok_dest = TRUE;
12588 }
12589 else
12590 fdh = NULL;
12591 }
12592 }
12593 else
12594 {
12595 bfd_set_error (bfd_error_bad_value);
12596 goto error_ret_free_internal;
12597 }
12598
12599 destination = 0;
12600 local_off = 0;
12601 if (ok_dest)
12602 {
12603 sym_value += irela->r_addend;
12604 destination = (sym_value
12605 + sym_sec->output_offset
12606 + sym_sec->output_section->vma);
12607 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12608 ? hash->elf.other
12609 : sym->st_other);
12610 }
12611
12612 code_sec = sym_sec;
12613 code_value = sym_value;
12614 opd = get_opd_info (sym_sec);
12615 if (opd != NULL)
12616 {
12617 bfd_vma dest;
12618
12619 if (hash == NULL && opd->adjust != NULL)
12620 {
12621 long adjust = opd->adjust[OPD_NDX (sym_value)];
12622 if (adjust == -1)
12623 continue;
12624 code_value += adjust;
12625 sym_value += adjust;
12626 }
12627 dest = opd_entry_value (sym_sec, sym_value,
12628 &code_sec, &code_value, FALSE);
12629 if (dest != (bfd_vma) -1)
12630 {
12631 destination = dest;
12632 if (fdh != NULL)
12633 {
12634 /* Fixup old ABI sym to point at code
12635 entry. */
12636 hash->elf.root.type = bfd_link_hash_defweak;
12637 hash->elf.root.u.def.section = code_sec;
12638 hash->elf.root.u.def.value = code_value;
12639 }
12640 }
12641 }
12642
12643 /* Determine what (if any) linker stub is needed. */
12644 plt_ent = NULL;
12645 stub_type = ppc_type_of_stub (section, irela, &hash,
12646 &plt_ent, destination,
12647 local_off);
12648
12649 if (stub_type != ppc_stub_plt_call)
12650 {
12651 /* Check whether we need a TOC adjusting stub.
12652 Since the linker pastes together pieces from
12653 different object files when creating the
12654 _init and _fini functions, it may be that a
12655 call to what looks like a local sym is in
12656 fact a call needing a TOC adjustment. */
12657 if (code_sec != NULL
12658 && code_sec->output_section != NULL
12659 && (htab->sec_info[code_sec->id].toc_off
12660 != htab->sec_info[section->id].toc_off)
12661 && (code_sec->has_toc_reloc
12662 || code_sec->makes_toc_func_call))
12663 stub_type = ppc_stub_long_branch_r2off;
12664 }
12665
12666 if (stub_type == ppc_stub_none)
12667 continue;
12668
12669 /* __tls_get_addr calls might be eliminated. */
12670 if (stub_type != ppc_stub_plt_call
12671 && hash != NULL
12672 && (hash == htab->tls_get_addr
12673 || hash == htab->tls_get_addr_fd)
12674 && section->has_tls_reloc
12675 && irela != internal_relocs)
12676 {
12677 /* Get tls info. */
12678 unsigned char *tls_mask;
12679
12680 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12681 irela - 1, input_bfd))
12682 goto error_ret_free_internal;
12683 if (*tls_mask != 0)
12684 continue;
12685 }
12686
12687 if (stub_type == ppc_stub_plt_call)
12688 {
12689 if (!htab->opd_abi
12690 && htab->params->plt_localentry0 != 0
12691 && is_elfv2_localentry0 (&hash->elf))
12692 htab->has_plt_localentry0 = 1;
12693 else if (irela + 1 < irelaend
12694 && irela[1].r_offset == irela->r_offset + 4
12695 && (ELF64_R_TYPE (irela[1].r_info)
12696 == R_PPC64_TOCSAVE))
12697 {
12698 if (!tocsave_find (htab, INSERT,
12699 &local_syms, irela + 1, input_bfd))
12700 goto error_ret_free_internal;
12701 }
12702 else
12703 stub_type = ppc_stub_plt_call_r2save;
12704 }
12705
12706 /* Support for grouping stub sections. */
12707 id_sec = htab->sec_info[section->id].u.group->link_sec;
12708
12709 /* Get the name of this stub. */
12710 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12711 if (!stub_name)
12712 goto error_ret_free_internal;
12713
12714 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12715 stub_name, FALSE, FALSE);
12716 if (stub_entry != NULL)
12717 {
12718 /* The proper stub has already been created. */
12719 free (stub_name);
12720 if (stub_type == ppc_stub_plt_call_r2save)
12721 stub_entry->stub_type = stub_type;
12722 continue;
12723 }
12724
12725 stub_entry = ppc_add_stub (stub_name, section, info);
12726 if (stub_entry == NULL)
12727 {
12728 free (stub_name);
12729 error_ret_free_internal:
12730 if (elf_section_data (section)->relocs == NULL)
12731 free (internal_relocs);
12732 error_ret_free_local:
12733 if (local_syms != NULL
12734 && (symtab_hdr->contents
12735 != (unsigned char *) local_syms))
12736 free (local_syms);
12737 return FALSE;
12738 }
12739
12740 stub_entry->stub_type = stub_type;
12741 if (stub_type != ppc_stub_plt_call
12742 && stub_type != ppc_stub_plt_call_r2save)
12743 {
12744 stub_entry->target_value = code_value;
12745 stub_entry->target_section = code_sec;
12746 }
12747 else
12748 {
12749 stub_entry->target_value = sym_value;
12750 stub_entry->target_section = sym_sec;
12751 }
12752 stub_entry->h = hash;
12753 stub_entry->plt_ent = plt_ent;
12754 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12755
12756 if (stub_entry->h != NULL)
12757 htab->stub_globals += 1;
12758 }
12759
12760 /* We're done with the internal relocs, free them. */
12761 if (elf_section_data (section)->relocs != internal_relocs)
12762 free (internal_relocs);
12763 }
12764
12765 if (local_syms != NULL
12766 && symtab_hdr->contents != (unsigned char *) local_syms)
12767 {
12768 if (!info->keep_memory)
12769 free (local_syms);
12770 else
12771 symtab_hdr->contents = (unsigned char *) local_syms;
12772 }
12773 }
12774
12775 /* We may have added some stubs. Find out the new size of the
12776 stub sections. */
12777 for (group = htab->group; group != NULL; group = group->next)
12778 if (group->stub_sec != NULL)
12779 {
12780 asection *stub_sec = group->stub_sec;
12781
12782 if (htab->stub_iteration <= STUB_SHRINK_ITER
12783 || stub_sec->rawsize < stub_sec->size)
12784 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12785 stub_sec->rawsize = stub_sec->size;
12786 stub_sec->size = 0;
12787 stub_sec->reloc_count = 0;
12788 stub_sec->flags &= ~SEC_RELOC;
12789 }
12790
12791 htab->brlt->size = 0;
12792 htab->brlt->reloc_count = 0;
12793 htab->brlt->flags &= ~SEC_RELOC;
12794 if (htab->relbrlt != NULL)
12795 htab->relbrlt->size = 0;
12796
12797 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12798
12799 for (group = htab->group; group != NULL; group = group->next)
12800 if (group->needs_save_res)
12801 group->stub_sec->size += htab->sfpr->size;
12802
12803 if (info->emitrelocations
12804 && htab->glink != NULL && htab->glink->size != 0)
12805 {
12806 htab->glink->reloc_count = 1;
12807 htab->glink->flags |= SEC_RELOC;
12808 }
12809
12810 if (htab->glink_eh_frame != NULL
12811 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12812 && htab->glink_eh_frame->output_section->size != 0)
12813 {
12814 size_t size = 0, align = 4;
12815
12816 for (group = htab->group; group != NULL; group = group->next)
12817 if (group->stub_sec != NULL)
12818 size += stub_eh_frame_size (group, align);
12819 if (htab->glink != NULL && htab->glink->size != 0)
12820 size += (24 + align - 1) & -align;
12821 if (size != 0)
12822 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12823 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12824 size = (size + align - 1) & -align;
12825 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12826 htab->glink_eh_frame->size = size;
12827 }
12828
12829 if (htab->params->plt_stub_align != 0)
12830 for (group = htab->group; group != NULL; group = group->next)
12831 if (group->stub_sec != NULL)
12832 group->stub_sec->size = ((group->stub_sec->size
12833 + (1 << htab->params->plt_stub_align) - 1)
12834 & -(1 << htab->params->plt_stub_align));
12835
12836 for (group = htab->group; group != NULL; group = group->next)
12837 if (group->stub_sec != NULL
12838 && group->stub_sec->rawsize != group->stub_sec->size
12839 && (htab->stub_iteration <= STUB_SHRINK_ITER
12840 || group->stub_sec->rawsize < group->stub_sec->size))
12841 break;
12842
12843 if (group == NULL
12844 && (htab->glink_eh_frame == NULL
12845 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12846 break;
12847
12848 /* Ask the linker to do its stuff. */
12849 (*htab->params->layout_sections_again) ();
12850 }
12851
12852 if (htab->glink_eh_frame != NULL
12853 && htab->glink_eh_frame->size != 0)
12854 {
12855 bfd_vma val;
12856 bfd_byte *p, *last_fde;
12857 size_t last_fde_len, size, align, pad;
12858 struct map_stub *group;
12859
12860 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12861 if (p == NULL)
12862 return FALSE;
12863 htab->glink_eh_frame->contents = p;
12864 last_fde = p;
12865 align = 4;
12866
12867 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12868 /* CIE length (rewrite in case little-endian). */
12869 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12870 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12871 p += last_fde_len + 4;
12872
12873 for (group = htab->group; group != NULL; group = group->next)
12874 if (group->stub_sec != NULL)
12875 {
12876 last_fde = p;
12877 last_fde_len = stub_eh_frame_size (group, align) - 4;
12878 /* FDE length. */
12879 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12880 p += 4;
12881 /* CIE pointer. */
12882 val = p - htab->glink_eh_frame->contents;
12883 bfd_put_32 (htab->elf.dynobj, val, p);
12884 p += 4;
12885 /* Offset to stub section, written later. */
12886 p += 4;
12887 /* stub section size. */
12888 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12889 p += 4;
12890 /* Augmentation. */
12891 p += 1;
12892 if (group->tls_get_addr_opt_bctrl != -1u)
12893 {
12894 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12895
12896 /* This FDE needs more than just the default.
12897 Describe __tls_get_addr_opt stub LR. */
12898 if (to_bctrl < 64)
12899 *p++ = DW_CFA_advance_loc + to_bctrl;
12900 else if (to_bctrl < 256)
12901 {
12902 *p++ = DW_CFA_advance_loc1;
12903 *p++ = to_bctrl;
12904 }
12905 else if (to_bctrl < 65536)
12906 {
12907 *p++ = DW_CFA_advance_loc2;
12908 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12909 p += 2;
12910 }
12911 else
12912 {
12913 *p++ = DW_CFA_advance_loc4;
12914 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12915 p += 4;
12916 }
12917 *p++ = DW_CFA_offset_extended_sf;
12918 *p++ = 65;
12919 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12920 *p++ = DW_CFA_advance_loc + 4;
12921 *p++ = DW_CFA_restore_extended;
12922 *p++ = 65;
12923 }
12924 /* Pad. */
12925 p = last_fde + last_fde_len + 4;
12926 }
12927 if (htab->glink != NULL && htab->glink->size != 0)
12928 {
12929 last_fde = p;
12930 last_fde_len = ((24 + align - 1) & -align) - 4;
12931 /* FDE length. */
12932 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12933 p += 4;
12934 /* CIE pointer. */
12935 val = p - htab->glink_eh_frame->contents;
12936 bfd_put_32 (htab->elf.dynobj, val, p);
12937 p += 4;
12938 /* Offset to .glink, written later. */
12939 p += 4;
12940 /* .glink size. */
12941 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12942 p += 4;
12943 /* Augmentation. */
12944 p += 1;
12945
12946 *p++ = DW_CFA_advance_loc + 1;
12947 *p++ = DW_CFA_register;
12948 *p++ = 65;
12949 *p++ = htab->opd_abi ? 12 : 0;
12950 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12951 *p++ = DW_CFA_restore_extended;
12952 *p++ = 65;
12953 p += ((24 + align - 1) & -align) - 24;
12954 }
12955 /* Subsume any padding into the last FDE if user .eh_frame
12956 sections are aligned more than glink_eh_frame. Otherwise any
12957 zero padding will be seen as a terminator. */
12958 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12959 size = p - htab->glink_eh_frame->contents;
12960 pad = ((size + align - 1) & -align) - size;
12961 htab->glink_eh_frame->size = size + pad;
12962 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12963 }
12964
12965 maybe_strip_output (info, htab->brlt);
12966 if (htab->glink_eh_frame != NULL)
12967 maybe_strip_output (info, htab->glink_eh_frame);
12968
12969 return TRUE;
12970 }
12971
12972 /* Called after we have determined section placement. If sections
12973 move, we'll be called again. Provide a value for TOCstart. */
12974
12975 bfd_vma
12976 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12977 {
12978 asection *s;
12979 bfd_vma TOCstart, adjust;
12980
12981 if (info != NULL)
12982 {
12983 struct elf_link_hash_entry *h;
12984 struct elf_link_hash_table *htab = elf_hash_table (info);
12985
12986 if (is_elf_hash_table (htab)
12987 && htab->hgot != NULL)
12988 h = htab->hgot;
12989 else
12990 {
12991 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12992 if (is_elf_hash_table (htab))
12993 htab->hgot = h;
12994 }
12995 if (h != NULL
12996 && h->root.type == bfd_link_hash_defined
12997 && !h->root.linker_def
12998 && (!is_elf_hash_table (htab)
12999 || h->def_regular))
13000 {
13001 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
13002 + h->root.u.def.section->output_offset
13003 + h->root.u.def.section->output_section->vma);
13004 _bfd_set_gp_value (obfd, TOCstart);
13005 return TOCstart;
13006 }
13007 }
13008
13009 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
13010 order. The TOC starts where the first of these sections starts. */
13011 s = bfd_get_section_by_name (obfd, ".got");
13012 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13013 s = bfd_get_section_by_name (obfd, ".toc");
13014 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13015 s = bfd_get_section_by_name (obfd, ".tocbss");
13016 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13017 s = bfd_get_section_by_name (obfd, ".plt");
13018 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13019 {
13020 /* This may happen for
13021 o references to TOC base (SYM@toc / TOC[tc0]) without a
13022 .toc directive
13023 o bad linker script
13024 o --gc-sections and empty TOC sections
13025
13026 FIXME: Warn user? */
13027
13028 /* Look for a likely section. We probably won't even be
13029 using TOCstart. */
13030 for (s = obfd->sections; s != NULL; s = s->next)
13031 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13032 | SEC_EXCLUDE))
13033 == (SEC_ALLOC | SEC_SMALL_DATA))
13034 break;
13035 if (s == NULL)
13036 for (s = obfd->sections; s != NULL; s = s->next)
13037 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13038 == (SEC_ALLOC | SEC_SMALL_DATA))
13039 break;
13040 if (s == NULL)
13041 for (s = obfd->sections; s != NULL; s = s->next)
13042 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13043 == SEC_ALLOC)
13044 break;
13045 if (s == NULL)
13046 for (s = obfd->sections; s != NULL; s = s->next)
13047 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13048 break;
13049 }
13050
13051 TOCstart = 0;
13052 if (s != NULL)
13053 TOCstart = s->output_section->vma + s->output_offset;
13054
13055 /* Force alignment. */
13056 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13057 TOCstart -= adjust;
13058 _bfd_set_gp_value (obfd, TOCstart);
13059
13060 if (info != NULL && s != NULL)
13061 {
13062 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13063
13064 if (htab != NULL)
13065 {
13066 if (htab->elf.hgot != NULL)
13067 {
13068 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13069 htab->elf.hgot->root.u.def.section = s;
13070 }
13071 }
13072 else
13073 {
13074 struct bfd_link_hash_entry *bh = NULL;
13075 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13076 s, TOC_BASE_OFF - adjust,
13077 NULL, FALSE, FALSE, &bh);
13078 }
13079 }
13080 return TOCstart;
13081 }
13082
13083 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13084 write out any global entry stubs. */
13085
13086 static bfd_boolean
13087 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13088 {
13089 struct bfd_link_info *info;
13090 struct ppc_link_hash_table *htab;
13091 struct plt_entry *pent;
13092 asection *s;
13093
13094 if (h->root.type == bfd_link_hash_indirect)
13095 return TRUE;
13096
13097 if (!h->pointer_equality_needed)
13098 return TRUE;
13099
13100 if (h->def_regular)
13101 return TRUE;
13102
13103 info = inf;
13104 htab = ppc_hash_table (info);
13105 if (htab == NULL)
13106 return FALSE;
13107
13108 s = htab->glink;
13109 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13110 if (pent->plt.offset != (bfd_vma) -1
13111 && pent->addend == 0)
13112 {
13113 bfd_byte *p;
13114 asection *plt;
13115 bfd_vma off;
13116
13117 p = s->contents + h->root.u.def.value;
13118 plt = htab->elf.splt;
13119 if (!htab->elf.dynamic_sections_created
13120 || h->dynindx == -1)
13121 plt = htab->elf.iplt;
13122 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13123 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13124
13125 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13126 {
13127 info->callbacks->einfo
13128 (_("%P: linkage table error against `%T'\n"),
13129 h->root.root.string);
13130 bfd_set_error (bfd_error_bad_value);
13131 htab->stub_error = TRUE;
13132 }
13133
13134 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13135 if (htab->params->emit_stub_syms)
13136 {
13137 size_t len = strlen (h->root.root.string);
13138 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13139
13140 if (name == NULL)
13141 return FALSE;
13142
13143 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13144 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13145 if (h == NULL)
13146 return FALSE;
13147 if (h->root.type == bfd_link_hash_new)
13148 {
13149 h->root.type = bfd_link_hash_defined;
13150 h->root.u.def.section = s;
13151 h->root.u.def.value = p - s->contents;
13152 h->ref_regular = 1;
13153 h->def_regular = 1;
13154 h->ref_regular_nonweak = 1;
13155 h->forced_local = 1;
13156 h->non_elf = 0;
13157 h->root.linker_def = 1;
13158 }
13159 }
13160
13161 if (PPC_HA (off) != 0)
13162 {
13163 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13164 p += 4;
13165 }
13166 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13167 p += 4;
13168 bfd_put_32 (s->owner, MTCTR_R12, p);
13169 p += 4;
13170 bfd_put_32 (s->owner, BCTR, p);
13171 break;
13172 }
13173 return TRUE;
13174 }
13175
13176 /* Build all the stubs associated with the current output file.
13177 The stubs are kept in a hash table attached to the main linker
13178 hash table. This function is called via gldelf64ppc_finish. */
13179
13180 bfd_boolean
13181 ppc64_elf_build_stubs (struct bfd_link_info *info,
13182 char **stats)
13183 {
13184 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13185 struct map_stub *group;
13186 asection *stub_sec;
13187 bfd_byte *p;
13188 int stub_sec_count = 0;
13189
13190 if (htab == NULL)
13191 return FALSE;
13192
13193 /* Allocate memory to hold the linker stubs. */
13194 for (group = htab->group; group != NULL; group = group->next)
13195 if ((stub_sec = group->stub_sec) != NULL
13196 && stub_sec->size != 0)
13197 {
13198 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13199 if (stub_sec->contents == NULL)
13200 return FALSE;
13201 stub_sec->size = 0;
13202 }
13203
13204 if (htab->glink != NULL && htab->glink->size != 0)
13205 {
13206 unsigned int indx;
13207 bfd_vma plt0;
13208
13209 /* Build the .glink plt call stub. */
13210 if (htab->params->emit_stub_syms)
13211 {
13212 struct elf_link_hash_entry *h;
13213 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13214 TRUE, FALSE, FALSE);
13215 if (h == NULL)
13216 return FALSE;
13217 if (h->root.type == bfd_link_hash_new)
13218 {
13219 h->root.type = bfd_link_hash_defined;
13220 h->root.u.def.section = htab->glink;
13221 h->root.u.def.value = 8;
13222 h->ref_regular = 1;
13223 h->def_regular = 1;
13224 h->ref_regular_nonweak = 1;
13225 h->forced_local = 1;
13226 h->non_elf = 0;
13227 h->root.linker_def = 1;
13228 }
13229 }
13230 plt0 = (htab->elf.splt->output_section->vma
13231 + htab->elf.splt->output_offset
13232 - 16);
13233 if (info->emitrelocations)
13234 {
13235 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13236 if (r == NULL)
13237 return FALSE;
13238 r->r_offset = (htab->glink->output_offset
13239 + htab->glink->output_section->vma);
13240 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13241 r->r_addend = plt0;
13242 }
13243 p = htab->glink->contents;
13244 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13245 bfd_put_64 (htab->glink->owner, plt0, p);
13246 p += 8;
13247 if (htab->opd_abi)
13248 {
13249 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13250 p += 4;
13251 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13252 p += 4;
13253 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13254 p += 4;
13255 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13256 p += 4;
13257 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13258 p += 4;
13259 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13260 p += 4;
13261 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13262 p += 4;
13263 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13264 p += 4;
13265 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13266 p += 4;
13267 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13268 p += 4;
13269 }
13270 else
13271 {
13272 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13273 p += 4;
13274 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13275 p += 4;
13276 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13277 p += 4;
13278 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13279 p += 4;
13280 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13281 p += 4;
13282 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13283 p += 4;
13284 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13285 p += 4;
13286 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13287 p += 4;
13288 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13289 p += 4;
13290 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13291 p += 4;
13292 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13293 p += 4;
13294 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13295 p += 4;
13296 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13297 p += 4;
13298 }
13299 bfd_put_32 (htab->glink->owner, BCTR, p);
13300 p += 4;
13301 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13302 {
13303 bfd_put_32 (htab->glink->owner, NOP, p);
13304 p += 4;
13305 }
13306
13307 /* Build the .glink lazy link call stubs. */
13308 indx = 0;
13309 while (p < htab->glink->contents + htab->glink->rawsize)
13310 {
13311 if (htab->opd_abi)
13312 {
13313 if (indx < 0x8000)
13314 {
13315 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13316 p += 4;
13317 }
13318 else
13319 {
13320 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13321 p += 4;
13322 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13323 p);
13324 p += 4;
13325 }
13326 }
13327 bfd_put_32 (htab->glink->owner,
13328 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13329 indx++;
13330 p += 4;
13331 }
13332
13333 /* Build .glink global entry stubs. */
13334 if (htab->glink->size > htab->glink->rawsize)
13335 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13336 }
13337
13338 if (htab->brlt != NULL && htab->brlt->size != 0)
13339 {
13340 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13341 htab->brlt->size);
13342 if (htab->brlt->contents == NULL)
13343 return FALSE;
13344 }
13345 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13346 {
13347 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13348 htab->relbrlt->size);
13349 if (htab->relbrlt->contents == NULL)
13350 return FALSE;
13351 }
13352
13353 /* Build the stubs as directed by the stub hash table. */
13354 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13355
13356 for (group = htab->group; group != NULL; group = group->next)
13357 if (group->needs_save_res)
13358 {
13359 stub_sec = group->stub_sec;
13360 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13361 htab->sfpr->size);
13362 if (htab->params->emit_stub_syms)
13363 {
13364 unsigned int i;
13365
13366 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13367 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13368 return FALSE;
13369 }
13370 stub_sec->size += htab->sfpr->size;
13371 }
13372
13373 if (htab->relbrlt != NULL)
13374 htab->relbrlt->reloc_count = 0;
13375
13376 if (htab->params->plt_stub_align != 0)
13377 for (group = htab->group; group != NULL; group = group->next)
13378 if ((stub_sec = group->stub_sec) != NULL)
13379 stub_sec->size = ((stub_sec->size
13380 + (1 << htab->params->plt_stub_align) - 1)
13381 & -(1 << htab->params->plt_stub_align));
13382
13383 for (group = htab->group; group != NULL; group = group->next)
13384 if ((stub_sec = group->stub_sec) != NULL)
13385 {
13386 stub_sec_count += 1;
13387 if (stub_sec->rawsize != stub_sec->size
13388 && (htab->stub_iteration <= STUB_SHRINK_ITER
13389 || stub_sec->rawsize < stub_sec->size))
13390 break;
13391 }
13392
13393 /* Note that the glink_eh_frame check here is not only testing that
13394 the generated size matched the calculated size but also that
13395 bfd_elf_discard_info didn't make any changes to the section. */
13396 if (group != NULL
13397 || (htab->glink_eh_frame != NULL
13398 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13399 {
13400 htab->stub_error = TRUE;
13401 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13402 }
13403
13404 if (htab->stub_error)
13405 return FALSE;
13406
13407 if (stats != NULL)
13408 {
13409 *stats = bfd_malloc (500);
13410 if (*stats == NULL)
13411 return FALSE;
13412
13413 sprintf (*stats, _("linker stubs in %u group%s\n"
13414 " branch %lu\n"
13415 " toc adjust %lu\n"
13416 " long branch %lu\n"
13417 " long toc adj %lu\n"
13418 " plt call %lu\n"
13419 " plt call toc %lu\n"
13420 " global entry %lu"),
13421 stub_sec_count,
13422 stub_sec_count == 1 ? "" : "s",
13423 htab->stub_count[ppc_stub_long_branch - 1],
13424 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13425 htab->stub_count[ppc_stub_plt_branch - 1],
13426 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13427 htab->stub_count[ppc_stub_plt_call - 1],
13428 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13429 htab->stub_count[ppc_stub_global_entry - 1]);
13430 }
13431 return TRUE;
13432 }
13433
13434 /* What to do when ld finds relocations against symbols defined in
13435 discarded sections. */
13436
13437 static unsigned int
13438 ppc64_elf_action_discarded (asection *sec)
13439 {
13440 if (strcmp (".opd", sec->name) == 0)
13441 return 0;
13442
13443 if (strcmp (".toc", sec->name) == 0)
13444 return 0;
13445
13446 if (strcmp (".toc1", sec->name) == 0)
13447 return 0;
13448
13449 return _bfd_elf_default_action_discarded (sec);
13450 }
13451
13452 /* The RELOCATE_SECTION function is called by the ELF backend linker
13453 to handle the relocations for a section.
13454
13455 The relocs are always passed as Rela structures; if the section
13456 actually uses Rel structures, the r_addend field will always be
13457 zero.
13458
13459 This function is responsible for adjust the section contents as
13460 necessary, and (if using Rela relocs and generating a
13461 relocatable output file) adjusting the reloc addend as
13462 necessary.
13463
13464 This function does not have to worry about setting the reloc
13465 address or the reloc symbol index.
13466
13467 LOCAL_SYMS is a pointer to the swapped in local symbols.
13468
13469 LOCAL_SECTIONS is an array giving the section in the input file
13470 corresponding to the st_shndx field of each local symbol.
13471
13472 The global hash table entry for the global symbols can be found
13473 via elf_sym_hashes (input_bfd).
13474
13475 When generating relocatable output, this function must handle
13476 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13477 going to be the section symbol corresponding to the output
13478 section, which means that the addend must be adjusted
13479 accordingly. */
13480
13481 static bfd_boolean
13482 ppc64_elf_relocate_section (bfd *output_bfd,
13483 struct bfd_link_info *info,
13484 bfd *input_bfd,
13485 asection *input_section,
13486 bfd_byte *contents,
13487 Elf_Internal_Rela *relocs,
13488 Elf_Internal_Sym *local_syms,
13489 asection **local_sections)
13490 {
13491 struct ppc_link_hash_table *htab;
13492 Elf_Internal_Shdr *symtab_hdr;
13493 struct elf_link_hash_entry **sym_hashes;
13494 Elf_Internal_Rela *rel;
13495 Elf_Internal_Rela *wrel;
13496 Elf_Internal_Rela *relend;
13497 Elf_Internal_Rela outrel;
13498 bfd_byte *loc;
13499 struct got_entry **local_got_ents;
13500 bfd_vma TOCstart;
13501 bfd_boolean ret = TRUE;
13502 bfd_boolean is_opd;
13503 /* Assume 'at' branch hints. */
13504 bfd_boolean is_isa_v2 = TRUE;
13505 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13506
13507 /* Initialize howto table if needed. */
13508 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13509 ppc_howto_init ();
13510
13511 htab = ppc_hash_table (info);
13512 if (htab == NULL)
13513 return FALSE;
13514
13515 /* Don't relocate stub sections. */
13516 if (input_section->owner == htab->params->stub_bfd)
13517 return TRUE;
13518
13519 BFD_ASSERT (is_ppc64_elf (input_bfd));
13520
13521 local_got_ents = elf_local_got_ents (input_bfd);
13522 TOCstart = elf_gp (output_bfd);
13523 symtab_hdr = &elf_symtab_hdr (input_bfd);
13524 sym_hashes = elf_sym_hashes (input_bfd);
13525 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13526
13527 rel = wrel = relocs;
13528 relend = relocs + input_section->reloc_count;
13529 for (; rel < relend; wrel++, rel++)
13530 {
13531 enum elf_ppc64_reloc_type r_type;
13532 bfd_vma addend;
13533 bfd_reloc_status_type r;
13534 Elf_Internal_Sym *sym;
13535 asection *sec;
13536 struct elf_link_hash_entry *h_elf;
13537 struct ppc_link_hash_entry *h;
13538 struct ppc_link_hash_entry *fdh;
13539 const char *sym_name;
13540 unsigned long r_symndx, toc_symndx;
13541 bfd_vma toc_addend;
13542 unsigned char tls_mask, tls_gd, tls_type;
13543 unsigned char sym_type;
13544 bfd_vma relocation;
13545 bfd_boolean unresolved_reloc;
13546 bfd_boolean warned;
13547 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13548 unsigned int insn;
13549 unsigned int mask;
13550 struct ppc_stub_hash_entry *stub_entry;
13551 bfd_vma max_br_offset;
13552 bfd_vma from;
13553 Elf_Internal_Rela orig_rel;
13554 reloc_howto_type *howto;
13555 struct reloc_howto_struct alt_howto;
13556
13557 again:
13558 orig_rel = *rel;
13559
13560 r_type = ELF64_R_TYPE (rel->r_info);
13561 r_symndx = ELF64_R_SYM (rel->r_info);
13562
13563 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13564 symbol of the previous ADDR64 reloc. The symbol gives us the
13565 proper TOC base to use. */
13566 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13567 && wrel != relocs
13568 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13569 && is_opd)
13570 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13571
13572 sym = NULL;
13573 sec = NULL;
13574 h_elf = NULL;
13575 sym_name = NULL;
13576 unresolved_reloc = FALSE;
13577 warned = FALSE;
13578
13579 if (r_symndx < symtab_hdr->sh_info)
13580 {
13581 /* It's a local symbol. */
13582 struct _opd_sec_data *opd;
13583
13584 sym = local_syms + r_symndx;
13585 sec = local_sections[r_symndx];
13586 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13587 sym_type = ELF64_ST_TYPE (sym->st_info);
13588 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13589 opd = get_opd_info (sec);
13590 if (opd != NULL && opd->adjust != NULL)
13591 {
13592 long adjust = opd->adjust[OPD_NDX (sym->st_value
13593 + rel->r_addend)];
13594 if (adjust == -1)
13595 relocation = 0;
13596 else
13597 {
13598 /* If this is a relocation against the opd section sym
13599 and we have edited .opd, adjust the reloc addend so
13600 that ld -r and ld --emit-relocs output is correct.
13601 If it is a reloc against some other .opd symbol,
13602 then the symbol value will be adjusted later. */
13603 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13604 rel->r_addend += adjust;
13605 else
13606 relocation += adjust;
13607 }
13608 }
13609 }
13610 else
13611 {
13612 bfd_boolean ignored;
13613
13614 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13615 r_symndx, symtab_hdr, sym_hashes,
13616 h_elf, sec, relocation,
13617 unresolved_reloc, warned, ignored);
13618 sym_name = h_elf->root.root.string;
13619 sym_type = h_elf->type;
13620 if (sec != NULL
13621 && sec->owner == output_bfd
13622 && strcmp (sec->name, ".opd") == 0)
13623 {
13624 /* This is a symbol defined in a linker script. All
13625 such are defined in output sections, even those
13626 defined by simple assignment from a symbol defined in
13627 an input section. Transfer the symbol to an
13628 appropriate input .opd section, so that a branch to
13629 this symbol will be mapped to the location specified
13630 by the opd entry. */
13631 struct bfd_link_order *lo;
13632 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13633 if (lo->type == bfd_indirect_link_order)
13634 {
13635 asection *isec = lo->u.indirect.section;
13636 if (h_elf->root.u.def.value >= isec->output_offset
13637 && h_elf->root.u.def.value < (isec->output_offset
13638 + isec->size))
13639 {
13640 h_elf->root.u.def.value -= isec->output_offset;
13641 h_elf->root.u.def.section = isec;
13642 sec = isec;
13643 break;
13644 }
13645 }
13646 }
13647 }
13648 h = (struct ppc_link_hash_entry *) h_elf;
13649
13650 if (sec != NULL && discarded_section (sec))
13651 {
13652 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13653 input_bfd, input_section,
13654 contents + rel->r_offset);
13655 wrel->r_offset = rel->r_offset;
13656 wrel->r_info = 0;
13657 wrel->r_addend = 0;
13658
13659 /* For ld -r, remove relocations in debug sections against
13660 sections defined in discarded sections. Not done for
13661 non-debug to preserve relocs in .eh_frame which the
13662 eh_frame editing code expects to be present. */
13663 if (bfd_link_relocatable (info)
13664 && (input_section->flags & SEC_DEBUGGING))
13665 wrel--;
13666
13667 continue;
13668 }
13669
13670 if (bfd_link_relocatable (info))
13671 goto copy_reloc;
13672
13673 if (h != NULL && &h->elf == htab->elf.hgot)
13674 {
13675 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13676 sec = bfd_abs_section_ptr;
13677 unresolved_reloc = FALSE;
13678 }
13679
13680 /* TLS optimizations. Replace instruction sequences and relocs
13681 based on information we collected in tls_optimize. We edit
13682 RELOCS so that --emit-relocs will output something sensible
13683 for the final instruction stream. */
13684 tls_mask = 0;
13685 tls_gd = 0;
13686 toc_symndx = 0;
13687 if (h != NULL)
13688 tls_mask = h->tls_mask;
13689 else if (local_got_ents != NULL)
13690 {
13691 struct plt_entry **local_plt = (struct plt_entry **)
13692 (local_got_ents + symtab_hdr->sh_info);
13693 unsigned char *lgot_masks = (unsigned char *)
13694 (local_plt + symtab_hdr->sh_info);
13695 tls_mask = lgot_masks[r_symndx];
13696 }
13697 if (tls_mask == 0
13698 && (r_type == R_PPC64_TLS
13699 || r_type == R_PPC64_TLSGD
13700 || r_type == R_PPC64_TLSLD))
13701 {
13702 /* Check for toc tls entries. */
13703 unsigned char *toc_tls;
13704
13705 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13706 &local_syms, rel, input_bfd))
13707 return FALSE;
13708
13709 if (toc_tls)
13710 tls_mask = *toc_tls;
13711 }
13712
13713 /* Check that tls relocs are used with tls syms, and non-tls
13714 relocs are used with non-tls syms. */
13715 if (r_symndx != STN_UNDEF
13716 && r_type != R_PPC64_NONE
13717 && (h == NULL
13718 || h->elf.root.type == bfd_link_hash_defined
13719 || h->elf.root.type == bfd_link_hash_defweak)
13720 && (IS_PPC64_TLS_RELOC (r_type)
13721 != (sym_type == STT_TLS
13722 || (sym_type == STT_SECTION
13723 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13724 {
13725 if (tls_mask != 0
13726 && (r_type == R_PPC64_TLS
13727 || r_type == R_PPC64_TLSGD
13728 || r_type == R_PPC64_TLSLD))
13729 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13730 ;
13731 else
13732 info->callbacks->einfo
13733 (!IS_PPC64_TLS_RELOC (r_type)
13734 /* xgettext:c-format */
13735 ? _("%H: %s used with TLS symbol `%T'\n")
13736 /* xgettext:c-format */
13737 : _("%H: %s used with non-TLS symbol `%T'\n"),
13738 input_bfd, input_section, rel->r_offset,
13739 ppc64_elf_howto_table[r_type]->name,
13740 sym_name);
13741 }
13742
13743 /* Ensure reloc mapping code below stays sane. */
13744 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13745 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13746 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13747 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13748 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13749 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13750 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13751 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13752 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13753 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13754 abort ();
13755
13756 switch (r_type)
13757 {
13758 default:
13759 break;
13760
13761 case R_PPC64_LO_DS_OPT:
13762 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13763 if ((insn & (0x3f << 26)) != 58u << 26)
13764 abort ();
13765 insn += (14u << 26) - (58u << 26);
13766 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13767 r_type = R_PPC64_TOC16_LO;
13768 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13769 break;
13770
13771 case R_PPC64_TOC16:
13772 case R_PPC64_TOC16_LO:
13773 case R_PPC64_TOC16_DS:
13774 case R_PPC64_TOC16_LO_DS:
13775 {
13776 /* Check for toc tls entries. */
13777 unsigned char *toc_tls;
13778 int retval;
13779
13780 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13781 &local_syms, rel, input_bfd);
13782 if (retval == 0)
13783 return FALSE;
13784
13785 if (toc_tls)
13786 {
13787 tls_mask = *toc_tls;
13788 if (r_type == R_PPC64_TOC16_DS
13789 || r_type == R_PPC64_TOC16_LO_DS)
13790 {
13791 if (tls_mask != 0
13792 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13793 goto toctprel;
13794 }
13795 else
13796 {
13797 /* If we found a GD reloc pair, then we might be
13798 doing a GD->IE transition. */
13799 if (retval == 2)
13800 {
13801 tls_gd = TLS_TPRELGD;
13802 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13803 goto tls_ldgd_opt;
13804 }
13805 else if (retval == 3)
13806 {
13807 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13808 goto tls_ldgd_opt;
13809 }
13810 }
13811 }
13812 }
13813 break;
13814
13815 case R_PPC64_GOT_TPREL16_HI:
13816 case R_PPC64_GOT_TPREL16_HA:
13817 if (tls_mask != 0
13818 && (tls_mask & TLS_TPREL) == 0)
13819 {
13820 rel->r_offset -= d_offset;
13821 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13822 r_type = R_PPC64_NONE;
13823 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13824 }
13825 break;
13826
13827 case R_PPC64_GOT_TPREL16_DS:
13828 case R_PPC64_GOT_TPREL16_LO_DS:
13829 if (tls_mask != 0
13830 && (tls_mask & TLS_TPREL) == 0)
13831 {
13832 toctprel:
13833 insn = bfd_get_32 (input_bfd,
13834 contents + rel->r_offset - d_offset);
13835 insn &= 31 << 21;
13836 insn |= 0x3c0d0000; /* addis 0,13,0 */
13837 bfd_put_32 (input_bfd, insn,
13838 contents + rel->r_offset - d_offset);
13839 r_type = R_PPC64_TPREL16_HA;
13840 if (toc_symndx != 0)
13841 {
13842 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13843 rel->r_addend = toc_addend;
13844 /* We changed the symbol. Start over in order to
13845 get h, sym, sec etc. right. */
13846 goto again;
13847 }
13848 else
13849 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13850 }
13851 break;
13852
13853 case R_PPC64_TLS:
13854 if (tls_mask != 0
13855 && (tls_mask & TLS_TPREL) == 0)
13856 {
13857 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13858 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13859 if (insn == 0)
13860 abort ();
13861 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13862 /* Was PPC64_TLS which sits on insn boundary, now
13863 PPC64_TPREL16_LO which is at low-order half-word. */
13864 rel->r_offset += d_offset;
13865 r_type = R_PPC64_TPREL16_LO;
13866 if (toc_symndx != 0)
13867 {
13868 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13869 rel->r_addend = toc_addend;
13870 /* We changed the symbol. Start over in order to
13871 get h, sym, sec etc. right. */
13872 goto again;
13873 }
13874 else
13875 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13876 }
13877 break;
13878
13879 case R_PPC64_GOT_TLSGD16_HI:
13880 case R_PPC64_GOT_TLSGD16_HA:
13881 tls_gd = TLS_TPRELGD;
13882 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13883 goto tls_gdld_hi;
13884 break;
13885
13886 case R_PPC64_GOT_TLSLD16_HI:
13887 case R_PPC64_GOT_TLSLD16_HA:
13888 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13889 {
13890 tls_gdld_hi:
13891 if ((tls_mask & tls_gd) != 0)
13892 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13893 + R_PPC64_GOT_TPREL16_DS);
13894 else
13895 {
13896 rel->r_offset -= d_offset;
13897 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13898 r_type = R_PPC64_NONE;
13899 }
13900 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13901 }
13902 break;
13903
13904 case R_PPC64_GOT_TLSGD16:
13905 case R_PPC64_GOT_TLSGD16_LO:
13906 tls_gd = TLS_TPRELGD;
13907 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13908 goto tls_ldgd_opt;
13909 break;
13910
13911 case R_PPC64_GOT_TLSLD16:
13912 case R_PPC64_GOT_TLSLD16_LO:
13913 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13914 {
13915 unsigned int insn1, insn2, insn3;
13916 bfd_vma offset;
13917
13918 tls_ldgd_opt:
13919 offset = (bfd_vma) -1;
13920 /* If not using the newer R_PPC64_TLSGD/LD to mark
13921 __tls_get_addr calls, we must trust that the call
13922 stays with its arg setup insns, ie. that the next
13923 reloc is the __tls_get_addr call associated with
13924 the current reloc. Edit both insns. */
13925 if (input_section->has_tls_get_addr_call
13926 && rel + 1 < relend
13927 && branch_reloc_hash_match (input_bfd, rel + 1,
13928 htab->tls_get_addr,
13929 htab->tls_get_addr_fd))
13930 offset = rel[1].r_offset;
13931 /* We read the low GOT_TLS (or TOC16) insn because we
13932 need to keep the destination reg. It may be
13933 something other than the usual r3, and moved to r3
13934 before the call by intervening code. */
13935 insn1 = bfd_get_32 (input_bfd,
13936 contents + rel->r_offset - d_offset);
13937 if ((tls_mask & tls_gd) != 0)
13938 {
13939 /* IE */
13940 insn1 &= (0x1f << 21) | (0x1f << 16);
13941 insn1 |= 58 << 26; /* ld */
13942 insn2 = 0x7c636a14; /* add 3,3,13 */
13943 if (offset != (bfd_vma) -1)
13944 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13945 if ((tls_mask & TLS_EXPLICIT) == 0)
13946 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13947 + R_PPC64_GOT_TPREL16_DS);
13948 else
13949 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13950 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13951 }
13952 else
13953 {
13954 /* LE */
13955 insn1 &= 0x1f << 21;
13956 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13957 insn2 = 0x38630000; /* addi 3,3,0 */
13958 if (tls_gd == 0)
13959 {
13960 /* Was an LD reloc. */
13961 if (toc_symndx)
13962 sec = local_sections[toc_symndx];
13963 for (r_symndx = 0;
13964 r_symndx < symtab_hdr->sh_info;
13965 r_symndx++)
13966 if (local_sections[r_symndx] == sec)
13967 break;
13968 if (r_symndx >= symtab_hdr->sh_info)
13969 r_symndx = STN_UNDEF;
13970 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13971 if (r_symndx != STN_UNDEF)
13972 rel->r_addend -= (local_syms[r_symndx].st_value
13973 + sec->output_offset
13974 + sec->output_section->vma);
13975 }
13976 else if (toc_symndx != 0)
13977 {
13978 r_symndx = toc_symndx;
13979 rel->r_addend = toc_addend;
13980 }
13981 r_type = R_PPC64_TPREL16_HA;
13982 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13983 if (offset != (bfd_vma) -1)
13984 {
13985 rel[1].r_info = ELF64_R_INFO (r_symndx,
13986 R_PPC64_TPREL16_LO);
13987 rel[1].r_offset = offset + d_offset;
13988 rel[1].r_addend = rel->r_addend;
13989 }
13990 }
13991 bfd_put_32 (input_bfd, insn1,
13992 contents + rel->r_offset - d_offset);
13993 if (offset != (bfd_vma) -1)
13994 {
13995 insn3 = bfd_get_32 (input_bfd,
13996 contents + offset + 4);
13997 if (insn3 == NOP
13998 || insn3 == CROR_151515 || insn3 == CROR_313131)
13999 {
14000 rel[1].r_offset += 4;
14001 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
14002 insn2 = NOP;
14003 }
14004 bfd_put_32 (input_bfd, insn2, contents + offset);
14005 }
14006 if ((tls_mask & tls_gd) == 0
14007 && (tls_gd == 0 || toc_symndx != 0))
14008 {
14009 /* We changed the symbol. Start over in order
14010 to get h, sym, sec etc. right. */
14011 goto again;
14012 }
14013 }
14014 break;
14015
14016 case R_PPC64_TLSGD:
14017 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
14018 {
14019 unsigned int insn2, insn3;
14020 bfd_vma offset = rel->r_offset;
14021
14022 if ((tls_mask & TLS_TPRELGD) != 0)
14023 {
14024 /* IE */
14025 r_type = R_PPC64_NONE;
14026 insn2 = 0x7c636a14; /* add 3,3,13 */
14027 }
14028 else
14029 {
14030 /* LE */
14031 if (toc_symndx != 0)
14032 {
14033 r_symndx = toc_symndx;
14034 rel->r_addend = toc_addend;
14035 }
14036 r_type = R_PPC64_TPREL16_LO;
14037 rel->r_offset = offset + d_offset;
14038 insn2 = 0x38630000; /* addi 3,3,0 */
14039 }
14040 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14041 /* Zap the reloc on the _tls_get_addr call too. */
14042 BFD_ASSERT (offset == rel[1].r_offset);
14043 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14044 insn3 = bfd_get_32 (input_bfd,
14045 contents + offset + 4);
14046 if (insn3 == NOP
14047 || insn3 == CROR_151515 || insn3 == CROR_313131)
14048 {
14049 rel->r_offset += 4;
14050 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
14051 insn2 = NOP;
14052 }
14053 bfd_put_32 (input_bfd, insn2, contents + offset);
14054 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14055 goto again;
14056 }
14057 break;
14058
14059 case R_PPC64_TLSLD:
14060 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
14061 {
14062 unsigned int insn2, insn3;
14063 bfd_vma offset = rel->r_offset;
14064
14065 if (toc_symndx)
14066 sec = local_sections[toc_symndx];
14067 for (r_symndx = 0;
14068 r_symndx < symtab_hdr->sh_info;
14069 r_symndx++)
14070 if (local_sections[r_symndx] == sec)
14071 break;
14072 if (r_symndx >= symtab_hdr->sh_info)
14073 r_symndx = STN_UNDEF;
14074 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14075 if (r_symndx != STN_UNDEF)
14076 rel->r_addend -= (local_syms[r_symndx].st_value
14077 + sec->output_offset
14078 + sec->output_section->vma);
14079
14080 r_type = R_PPC64_TPREL16_LO;
14081 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14082 rel->r_offset = offset + d_offset;
14083 /* Zap the reloc on the _tls_get_addr call too. */
14084 BFD_ASSERT (offset == rel[1].r_offset);
14085 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14086 insn2 = 0x38630000; /* addi 3,3,0 */
14087 insn3 = bfd_get_32 (input_bfd,
14088 contents + offset + 4);
14089 if (insn3 == NOP
14090 || insn3 == CROR_151515 || insn3 == CROR_313131)
14091 {
14092 rel->r_offset += 4;
14093 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
14094 insn2 = NOP;
14095 }
14096 bfd_put_32 (input_bfd, insn2, contents + offset);
14097 goto again;
14098 }
14099 break;
14100
14101 case R_PPC64_DTPMOD64:
14102 if (rel + 1 < relend
14103 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14104 && rel[1].r_offset == rel->r_offset + 8)
14105 {
14106 if ((tls_mask & TLS_GD) == 0)
14107 {
14108 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14109 if ((tls_mask & TLS_TPRELGD) != 0)
14110 r_type = R_PPC64_TPREL64;
14111 else
14112 {
14113 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14114 r_type = R_PPC64_NONE;
14115 }
14116 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14117 }
14118 }
14119 else
14120 {
14121 if ((tls_mask & TLS_LD) == 0)
14122 {
14123 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14124 r_type = R_PPC64_NONE;
14125 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14126 }
14127 }
14128 break;
14129
14130 case R_PPC64_TPREL64:
14131 if ((tls_mask & TLS_TPREL) == 0)
14132 {
14133 r_type = R_PPC64_NONE;
14134 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14135 }
14136 break;
14137
14138 case R_PPC64_ENTRY:
14139 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14140 if (!bfd_link_pic (info)
14141 && !info->traditional_format
14142 && relocation + 0x80008000 <= 0xffffffff)
14143 {
14144 unsigned int insn1, insn2;
14145
14146 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14147 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14148 if ((insn1 & ~0xfffc) == LD_R2_0R12
14149 && insn2 == ADD_R2_R2_R12)
14150 {
14151 bfd_put_32 (input_bfd,
14152 LIS_R2 + PPC_HA (relocation),
14153 contents + rel->r_offset);
14154 bfd_put_32 (input_bfd,
14155 ADDI_R2_R2 + PPC_LO (relocation),
14156 contents + rel->r_offset + 4);
14157 }
14158 }
14159 else
14160 {
14161 relocation -= (rel->r_offset
14162 + input_section->output_offset
14163 + input_section->output_section->vma);
14164 if (relocation + 0x80008000 <= 0xffffffff)
14165 {
14166 unsigned int insn1, insn2;
14167
14168 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14169 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14170 if ((insn1 & ~0xfffc) == LD_R2_0R12
14171 && insn2 == ADD_R2_R2_R12)
14172 {
14173 bfd_put_32 (input_bfd,
14174 ADDIS_R2_R12 + PPC_HA (relocation),
14175 contents + rel->r_offset);
14176 bfd_put_32 (input_bfd,
14177 ADDI_R2_R2 + PPC_LO (relocation),
14178 contents + rel->r_offset + 4);
14179 }
14180 }
14181 }
14182 break;
14183
14184 case R_PPC64_REL16_HA:
14185 /* If we are generating a non-PIC executable, edit
14186 . 0: addis 2,12,.TOC.-0b@ha
14187 . addi 2,2,.TOC.-0b@l
14188 used by ELFv2 global entry points to set up r2, to
14189 . lis 2,.TOC.@ha
14190 . addi 2,2,.TOC.@l
14191 if .TOC. is in range. */
14192 if (!bfd_link_pic (info)
14193 && !info->traditional_format
14194 && !htab->opd_abi
14195 && rel->r_addend == d_offset
14196 && h != NULL && &h->elf == htab->elf.hgot
14197 && rel + 1 < relend
14198 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14199 && rel[1].r_offset == rel->r_offset + 4
14200 && rel[1].r_addend == rel->r_addend + 4
14201 && relocation + 0x80008000 <= 0xffffffff)
14202 {
14203 unsigned int insn1, insn2;
14204 bfd_vma offset = rel->r_offset - d_offset;
14205 insn1 = bfd_get_32 (input_bfd, contents + offset);
14206 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14207 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14208 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14209 {
14210 r_type = R_PPC64_ADDR16_HA;
14211 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14212 rel->r_addend -= d_offset;
14213 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14214 rel[1].r_addend -= d_offset + 4;
14215 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14216 }
14217 }
14218 break;
14219 }
14220
14221 /* Handle other relocations that tweak non-addend part of insn. */
14222 insn = 0;
14223 max_br_offset = 1 << 25;
14224 addend = rel->r_addend;
14225 reloc_dest = DEST_NORMAL;
14226 switch (r_type)
14227 {
14228 default:
14229 break;
14230
14231 case R_PPC64_TOCSAVE:
14232 if (relocation + addend == (rel->r_offset
14233 + input_section->output_offset
14234 + input_section->output_section->vma)
14235 && tocsave_find (htab, NO_INSERT,
14236 &local_syms, rel, input_bfd))
14237 {
14238 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14239 if (insn == NOP
14240 || insn == CROR_151515 || insn == CROR_313131)
14241 bfd_put_32 (input_bfd,
14242 STD_R2_0R1 + STK_TOC (htab),
14243 contents + rel->r_offset);
14244 }
14245 break;
14246
14247 /* Branch taken prediction relocations. */
14248 case R_PPC64_ADDR14_BRTAKEN:
14249 case R_PPC64_REL14_BRTAKEN:
14250 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14251 /* Fall through. */
14252
14253 /* Branch not taken prediction relocations. */
14254 case R_PPC64_ADDR14_BRNTAKEN:
14255 case R_PPC64_REL14_BRNTAKEN:
14256 insn |= bfd_get_32 (input_bfd,
14257 contents + rel->r_offset) & ~(0x01 << 21);
14258 /* Fall through. */
14259
14260 case R_PPC64_REL14:
14261 max_br_offset = 1 << 15;
14262 /* Fall through. */
14263
14264 case R_PPC64_REL24:
14265 /* Calls to functions with a different TOC, such as calls to
14266 shared objects, need to alter the TOC pointer. This is
14267 done using a linkage stub. A REL24 branching to these
14268 linkage stubs needs to be followed by a nop, as the nop
14269 will be replaced with an instruction to restore the TOC
14270 base pointer. */
14271 fdh = h;
14272 if (h != NULL
14273 && h->oh != NULL
14274 && h->oh->is_func_descriptor)
14275 fdh = ppc_follow_link (h->oh);
14276 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14277 htab);
14278 if (stub_entry != NULL
14279 && (stub_entry->stub_type == ppc_stub_plt_call
14280 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14281 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14282 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14283 {
14284 bfd_boolean can_plt_call = FALSE;
14285
14286 if (stub_entry->stub_type == ppc_stub_plt_call
14287 && !htab->opd_abi
14288 && htab->params->plt_localentry0 != 0
14289 && is_elfv2_localentry0 (&h->elf))
14290 {
14291 /* The function doesn't use or change r2. */
14292 can_plt_call = TRUE;
14293 }
14294
14295 /* All of these stubs may modify r2, so there must be a
14296 branch and link followed by a nop. The nop is
14297 replaced by an insn to restore r2. */
14298 else if (rel->r_offset + 8 <= input_section->size)
14299 {
14300 unsigned long br;
14301
14302 br = bfd_get_32 (input_bfd,
14303 contents + rel->r_offset);
14304 if ((br & 1) != 0)
14305 {
14306 unsigned long nop;
14307
14308 nop = bfd_get_32 (input_bfd,
14309 contents + rel->r_offset + 4);
14310 if (nop == NOP
14311 || nop == CROR_151515 || nop == CROR_313131)
14312 {
14313 if (h != NULL
14314 && (h == htab->tls_get_addr_fd
14315 || h == htab->tls_get_addr)
14316 && htab->params->tls_get_addr_opt)
14317 {
14318 /* Special stub used, leave nop alone. */
14319 }
14320 else
14321 bfd_put_32 (input_bfd,
14322 LD_R2_0R1 + STK_TOC (htab),
14323 contents + rel->r_offset + 4);
14324 can_plt_call = TRUE;
14325 }
14326 }
14327 }
14328
14329 if (!can_plt_call && h != NULL)
14330 {
14331 const char *name = h->elf.root.root.string;
14332
14333 if (*name == '.')
14334 ++name;
14335
14336 if (strncmp (name, "__libc_start_main", 17) == 0
14337 && (name[17] == 0 || name[17] == '@'))
14338 {
14339 /* Allow crt1 branch to go via a toc adjusting
14340 stub. Other calls that never return could do
14341 the same, if we could detect such. */
14342 can_plt_call = TRUE;
14343 }
14344 }
14345
14346 if (!can_plt_call)
14347 {
14348 /* g++ as of 20130507 emits self-calls without a
14349 following nop. This is arguably wrong since we
14350 have conflicting information. On the one hand a
14351 global symbol and on the other a local call
14352 sequence, but don't error for this special case.
14353 It isn't possible to cheaply verify we have
14354 exactly such a call. Allow all calls to the same
14355 section. */
14356 asection *code_sec = sec;
14357
14358 if (get_opd_info (sec) != NULL)
14359 {
14360 bfd_vma off = (relocation + addend
14361 - sec->output_section->vma
14362 - sec->output_offset);
14363
14364 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14365 }
14366 if (code_sec == input_section)
14367 can_plt_call = TRUE;
14368 }
14369
14370 if (!can_plt_call)
14371 {
14372 if (stub_entry->stub_type == ppc_stub_plt_call
14373 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14374 info->callbacks->einfo
14375 /* xgettext:c-format */
14376 (_("%H: call to `%T' lacks nop, can't restore toc; "
14377 "recompile with -fPIC\n"),
14378 input_bfd, input_section, rel->r_offset, sym_name);
14379 else
14380 info->callbacks->einfo
14381 /* xgettext:c-format */
14382 (_("%H: call to `%T' lacks nop, can't restore toc; "
14383 "(-mcmodel=small toc adjust stub)\n"),
14384 input_bfd, input_section, rel->r_offset, sym_name);
14385
14386 bfd_set_error (bfd_error_bad_value);
14387 ret = FALSE;
14388 }
14389
14390 if (can_plt_call
14391 && (stub_entry->stub_type == ppc_stub_plt_call
14392 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14393 unresolved_reloc = FALSE;
14394 }
14395
14396 if ((stub_entry == NULL
14397 || stub_entry->stub_type == ppc_stub_long_branch
14398 || stub_entry->stub_type == ppc_stub_plt_branch)
14399 && get_opd_info (sec) != NULL)
14400 {
14401 /* The branch destination is the value of the opd entry. */
14402 bfd_vma off = (relocation + addend
14403 - sec->output_section->vma
14404 - sec->output_offset);
14405 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14406 if (dest != (bfd_vma) -1)
14407 {
14408 relocation = dest;
14409 addend = 0;
14410 reloc_dest = DEST_OPD;
14411 }
14412 }
14413
14414 /* If the branch is out of reach we ought to have a long
14415 branch stub. */
14416 from = (rel->r_offset
14417 + input_section->output_offset
14418 + input_section->output_section->vma);
14419
14420 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14421 ? fdh->elf.other
14422 : sym->st_other);
14423
14424 if (stub_entry != NULL
14425 && (stub_entry->stub_type == ppc_stub_long_branch
14426 || stub_entry->stub_type == ppc_stub_plt_branch)
14427 && (r_type == R_PPC64_ADDR14_BRTAKEN
14428 || r_type == R_PPC64_ADDR14_BRNTAKEN
14429 || (relocation + addend - from + max_br_offset
14430 < 2 * max_br_offset)))
14431 /* Don't use the stub if this branch is in range. */
14432 stub_entry = NULL;
14433
14434 if (stub_entry != NULL)
14435 {
14436 /* Munge up the value and addend so that we call the stub
14437 rather than the procedure directly. */
14438 asection *stub_sec = stub_entry->group->stub_sec;
14439
14440 if (stub_entry->stub_type == ppc_stub_save_res)
14441 relocation += (stub_sec->output_offset
14442 + stub_sec->output_section->vma
14443 + stub_sec->size - htab->sfpr->size
14444 - htab->sfpr->output_offset
14445 - htab->sfpr->output_section->vma);
14446 else
14447 relocation = (stub_entry->stub_offset
14448 + stub_sec->output_offset
14449 + stub_sec->output_section->vma);
14450 addend = 0;
14451 reloc_dest = DEST_STUB;
14452
14453 if ((stub_entry->stub_type == ppc_stub_plt_call
14454 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14455 && (ALWAYS_EMIT_R2SAVE
14456 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14457 && rel + 1 < relend
14458 && rel[1].r_offset == rel->r_offset + 4
14459 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14460 relocation += 4;
14461 }
14462
14463 if (insn != 0)
14464 {
14465 if (is_isa_v2)
14466 {
14467 /* Set 'a' bit. This is 0b00010 in BO field for branch
14468 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14469 for branch on CTR insns (BO == 1a00t or 1a01t). */
14470 if ((insn & (0x14 << 21)) == (0x04 << 21))
14471 insn |= 0x02 << 21;
14472 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14473 insn |= 0x08 << 21;
14474 else
14475 break;
14476 }
14477 else
14478 {
14479 /* Invert 'y' bit if not the default. */
14480 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14481 insn ^= 0x01 << 21;
14482 }
14483
14484 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14485 }
14486
14487 /* NOP out calls to undefined weak functions.
14488 We can thus call a weak function without first
14489 checking whether the function is defined. */
14490 else if (h != NULL
14491 && h->elf.root.type == bfd_link_hash_undefweak
14492 && h->elf.dynindx == -1
14493 && r_type == R_PPC64_REL24
14494 && relocation == 0
14495 && addend == 0)
14496 {
14497 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14498 goto copy_reloc;
14499 }
14500 break;
14501 }
14502
14503 /* Set `addend'. */
14504 tls_type = 0;
14505 switch (r_type)
14506 {
14507 default:
14508 info->callbacks->einfo
14509 /* xgettext:c-format */
14510 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14511 input_bfd, (int) r_type, sym_name);
14512
14513 bfd_set_error (bfd_error_bad_value);
14514 ret = FALSE;
14515 goto copy_reloc;
14516
14517 case R_PPC64_NONE:
14518 case R_PPC64_TLS:
14519 case R_PPC64_TLSGD:
14520 case R_PPC64_TLSLD:
14521 case R_PPC64_TOCSAVE:
14522 case R_PPC64_GNU_VTINHERIT:
14523 case R_PPC64_GNU_VTENTRY:
14524 case R_PPC64_ENTRY:
14525 goto copy_reloc;
14526
14527 /* GOT16 relocations. Like an ADDR16 using the symbol's
14528 address in the GOT as relocation value instead of the
14529 symbol's value itself. Also, create a GOT entry for the
14530 symbol and put the symbol value there. */
14531 case R_PPC64_GOT_TLSGD16:
14532 case R_PPC64_GOT_TLSGD16_LO:
14533 case R_PPC64_GOT_TLSGD16_HI:
14534 case R_PPC64_GOT_TLSGD16_HA:
14535 tls_type = TLS_TLS | TLS_GD;
14536 goto dogot;
14537
14538 case R_PPC64_GOT_TLSLD16:
14539 case R_PPC64_GOT_TLSLD16_LO:
14540 case R_PPC64_GOT_TLSLD16_HI:
14541 case R_PPC64_GOT_TLSLD16_HA:
14542 tls_type = TLS_TLS | TLS_LD;
14543 goto dogot;
14544
14545 case R_PPC64_GOT_TPREL16_DS:
14546 case R_PPC64_GOT_TPREL16_LO_DS:
14547 case R_PPC64_GOT_TPREL16_HI:
14548 case R_PPC64_GOT_TPREL16_HA:
14549 tls_type = TLS_TLS | TLS_TPREL;
14550 goto dogot;
14551
14552 case R_PPC64_GOT_DTPREL16_DS:
14553 case R_PPC64_GOT_DTPREL16_LO_DS:
14554 case R_PPC64_GOT_DTPREL16_HI:
14555 case R_PPC64_GOT_DTPREL16_HA:
14556 tls_type = TLS_TLS | TLS_DTPREL;
14557 goto dogot;
14558
14559 case R_PPC64_GOT16:
14560 case R_PPC64_GOT16_LO:
14561 case R_PPC64_GOT16_HI:
14562 case R_PPC64_GOT16_HA:
14563 case R_PPC64_GOT16_DS:
14564 case R_PPC64_GOT16_LO_DS:
14565 dogot:
14566 {
14567 /* Relocation is to the entry for this symbol in the global
14568 offset table. */
14569 asection *got;
14570 bfd_vma *offp;
14571 bfd_vma off;
14572 unsigned long indx = 0;
14573 struct got_entry *ent;
14574
14575 if (tls_type == (TLS_TLS | TLS_LD)
14576 && (h == NULL
14577 || !h->elf.def_dynamic))
14578 ent = ppc64_tlsld_got (input_bfd);
14579 else
14580 {
14581 if (h != NULL)
14582 {
14583 if (!htab->elf.dynamic_sections_created
14584 || h->elf.dynindx == -1
14585 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14586 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14587 /* This is actually a static link, or it is a
14588 -Bsymbolic link and the symbol is defined
14589 locally, or the symbol was forced to be local
14590 because of a version file. */
14591 ;
14592 else
14593 {
14594 indx = h->elf.dynindx;
14595 unresolved_reloc = FALSE;
14596 }
14597 ent = h->elf.got.glist;
14598 }
14599 else
14600 {
14601 if (local_got_ents == NULL)
14602 abort ();
14603 ent = local_got_ents[r_symndx];
14604 }
14605
14606 for (; ent != NULL; ent = ent->next)
14607 if (ent->addend == orig_rel.r_addend
14608 && ent->owner == input_bfd
14609 && ent->tls_type == tls_type)
14610 break;
14611 }
14612
14613 if (ent == NULL)
14614 abort ();
14615 if (ent->is_indirect)
14616 ent = ent->got.ent;
14617 offp = &ent->got.offset;
14618 got = ppc64_elf_tdata (ent->owner)->got;
14619 if (got == NULL)
14620 abort ();
14621
14622 /* The offset must always be a multiple of 8. We use the
14623 least significant bit to record whether we have already
14624 processed this entry. */
14625 off = *offp;
14626 if ((off & 1) != 0)
14627 off &= ~1;
14628 else
14629 {
14630 /* Generate relocs for the dynamic linker, except in
14631 the case of TLSLD where we'll use one entry per
14632 module. */
14633 asection *relgot;
14634 bfd_boolean ifunc;
14635
14636 *offp = off | 1;
14637 relgot = NULL;
14638 ifunc = (h != NULL
14639 ? h->elf.type == STT_GNU_IFUNC
14640 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14641 if (ifunc)
14642 {
14643 relgot = htab->elf.irelplt;
14644 if (indx == 0)
14645 htab->local_ifunc_resolver = 1;
14646 else if (is_static_defined (&h->elf))
14647 htab->maybe_local_ifunc_resolver = 1;
14648 }
14649 else if (indx != 0
14650 || (bfd_link_pic (info)
14651 && (h == NULL
14652 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14653 || (tls_type == (TLS_TLS | TLS_LD)
14654 && !h->elf.def_dynamic))))
14655 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14656 if (relgot != NULL)
14657 {
14658 outrel.r_offset = (got->output_section->vma
14659 + got->output_offset
14660 + off);
14661 outrel.r_addend = addend;
14662 if (tls_type & (TLS_LD | TLS_GD))
14663 {
14664 outrel.r_addend = 0;
14665 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14666 if (tls_type == (TLS_TLS | TLS_GD))
14667 {
14668 loc = relgot->contents;
14669 loc += (relgot->reloc_count++
14670 * sizeof (Elf64_External_Rela));
14671 bfd_elf64_swap_reloca_out (output_bfd,
14672 &outrel, loc);
14673 outrel.r_offset += 8;
14674 outrel.r_addend = addend;
14675 outrel.r_info
14676 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14677 }
14678 }
14679 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14680 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14681 else if (tls_type == (TLS_TLS | TLS_TPREL))
14682 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14683 else if (indx != 0)
14684 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14685 else
14686 {
14687 if (ifunc)
14688 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14689 else
14690 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14691
14692 /* Write the .got section contents for the sake
14693 of prelink. */
14694 loc = got->contents + off;
14695 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14696 loc);
14697 }
14698
14699 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14700 {
14701 outrel.r_addend += relocation;
14702 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14703 {
14704 if (htab->elf.tls_sec == NULL)
14705 outrel.r_addend = 0;
14706 else
14707 outrel.r_addend -= htab->elf.tls_sec->vma;
14708 }
14709 }
14710 loc = relgot->contents;
14711 loc += (relgot->reloc_count++
14712 * sizeof (Elf64_External_Rela));
14713 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14714 }
14715
14716 /* Init the .got section contents here if we're not
14717 emitting a reloc. */
14718 else
14719 {
14720 relocation += addend;
14721 if (tls_type != 0)
14722 {
14723 if (htab->elf.tls_sec == NULL)
14724 relocation = 0;
14725 else
14726 {
14727 if (tls_type & TLS_LD)
14728 relocation = 0;
14729 else
14730 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14731 if (tls_type & TLS_TPREL)
14732 relocation += DTP_OFFSET - TP_OFFSET;
14733 }
14734
14735 if (tls_type & (TLS_GD | TLS_LD))
14736 {
14737 bfd_put_64 (output_bfd, relocation,
14738 got->contents + off + 8);
14739 relocation = 1;
14740 }
14741 }
14742 bfd_put_64 (output_bfd, relocation,
14743 got->contents + off);
14744 }
14745 }
14746
14747 if (off >= (bfd_vma) -2)
14748 abort ();
14749
14750 relocation = got->output_section->vma + got->output_offset + off;
14751 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14752 }
14753 break;
14754
14755 case R_PPC64_PLT16_HA:
14756 case R_PPC64_PLT16_HI:
14757 case R_PPC64_PLT16_LO:
14758 case R_PPC64_PLT32:
14759 case R_PPC64_PLT64:
14760 /* Relocation is to the entry for this symbol in the
14761 procedure linkage table. */
14762 {
14763 struct plt_entry **plt_list = NULL;
14764 if (h != NULL)
14765 plt_list = &h->elf.plt.plist;
14766 else if (local_got_ents != NULL)
14767 {
14768 struct plt_entry **local_plt = (struct plt_entry **)
14769 (local_got_ents + symtab_hdr->sh_info);
14770 unsigned char *local_got_tls_masks = (unsigned char *)
14771 (local_plt + symtab_hdr->sh_info);
14772 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14773 plt_list = local_plt + r_symndx;
14774 }
14775 if (plt_list)
14776 {
14777 struct plt_entry *ent;
14778
14779 for (ent = *plt_list; ent != NULL; ent = ent->next)
14780 if (ent->plt.offset != (bfd_vma) -1
14781 && ent->addend == orig_rel.r_addend)
14782 {
14783 asection *plt;
14784
14785 plt = htab->elf.splt;
14786 if (!htab->elf.dynamic_sections_created
14787 || h == NULL
14788 || h->elf.dynindx == -1)
14789 plt = htab->elf.iplt;
14790 relocation = (plt->output_section->vma
14791 + plt->output_offset
14792 + ent->plt.offset);
14793 addend = 0;
14794 unresolved_reloc = FALSE;
14795 break;
14796 }
14797 }
14798 }
14799 break;
14800
14801 case R_PPC64_TOC:
14802 /* Relocation value is TOC base. */
14803 relocation = TOCstart;
14804 if (r_symndx == STN_UNDEF)
14805 relocation += htab->sec_info[input_section->id].toc_off;
14806 else if (unresolved_reloc)
14807 ;
14808 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14809 relocation += htab->sec_info[sec->id].toc_off;
14810 else
14811 unresolved_reloc = TRUE;
14812 goto dodyn;
14813
14814 /* TOC16 relocs. We want the offset relative to the TOC base,
14815 which is the address of the start of the TOC plus 0x8000.
14816 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14817 in this order. */
14818 case R_PPC64_TOC16:
14819 case R_PPC64_TOC16_LO:
14820 case R_PPC64_TOC16_HI:
14821 case R_PPC64_TOC16_DS:
14822 case R_PPC64_TOC16_LO_DS:
14823 case R_PPC64_TOC16_HA:
14824 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14825 break;
14826
14827 /* Relocate against the beginning of the section. */
14828 case R_PPC64_SECTOFF:
14829 case R_PPC64_SECTOFF_LO:
14830 case R_PPC64_SECTOFF_HI:
14831 case R_PPC64_SECTOFF_DS:
14832 case R_PPC64_SECTOFF_LO_DS:
14833 case R_PPC64_SECTOFF_HA:
14834 if (sec != NULL)
14835 addend -= sec->output_section->vma;
14836 break;
14837
14838 case R_PPC64_REL16:
14839 case R_PPC64_REL16_LO:
14840 case R_PPC64_REL16_HI:
14841 case R_PPC64_REL16_HA:
14842 case R_PPC64_REL16DX_HA:
14843 break;
14844
14845 case R_PPC64_REL14:
14846 case R_PPC64_REL14_BRNTAKEN:
14847 case R_PPC64_REL14_BRTAKEN:
14848 case R_PPC64_REL24:
14849 break;
14850
14851 case R_PPC64_TPREL16:
14852 case R_PPC64_TPREL16_LO:
14853 case R_PPC64_TPREL16_HI:
14854 case R_PPC64_TPREL16_HA:
14855 case R_PPC64_TPREL16_DS:
14856 case R_PPC64_TPREL16_LO_DS:
14857 case R_PPC64_TPREL16_HIGH:
14858 case R_PPC64_TPREL16_HIGHA:
14859 case R_PPC64_TPREL16_HIGHER:
14860 case R_PPC64_TPREL16_HIGHERA:
14861 case R_PPC64_TPREL16_HIGHEST:
14862 case R_PPC64_TPREL16_HIGHESTA:
14863 if (h != NULL
14864 && h->elf.root.type == bfd_link_hash_undefweak
14865 && h->elf.dynindx == -1)
14866 {
14867 /* Make this relocation against an undefined weak symbol
14868 resolve to zero. This is really just a tweak, since
14869 code using weak externs ought to check that they are
14870 defined before using them. */
14871 bfd_byte *p = contents + rel->r_offset - d_offset;
14872
14873 insn = bfd_get_32 (input_bfd, p);
14874 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14875 if (insn != 0)
14876 bfd_put_32 (input_bfd, insn, p);
14877 break;
14878 }
14879 if (htab->elf.tls_sec != NULL)
14880 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14881 if (bfd_link_pic (info))
14882 /* The TPREL16 relocs shouldn't really be used in shared
14883 libs as they will result in DT_TEXTREL being set, but
14884 support them anyway. */
14885 goto dodyn;
14886 break;
14887
14888 case R_PPC64_DTPREL16:
14889 case R_PPC64_DTPREL16_LO:
14890 case R_PPC64_DTPREL16_HI:
14891 case R_PPC64_DTPREL16_HA:
14892 case R_PPC64_DTPREL16_DS:
14893 case R_PPC64_DTPREL16_LO_DS:
14894 case R_PPC64_DTPREL16_HIGH:
14895 case R_PPC64_DTPREL16_HIGHA:
14896 case R_PPC64_DTPREL16_HIGHER:
14897 case R_PPC64_DTPREL16_HIGHERA:
14898 case R_PPC64_DTPREL16_HIGHEST:
14899 case R_PPC64_DTPREL16_HIGHESTA:
14900 if (htab->elf.tls_sec != NULL)
14901 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14902 break;
14903
14904 case R_PPC64_ADDR64_LOCAL:
14905 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14906 ? h->elf.other
14907 : sym->st_other);
14908 break;
14909
14910 case R_PPC64_DTPMOD64:
14911 relocation = 1;
14912 addend = 0;
14913 goto dodyn;
14914
14915 case R_PPC64_TPREL64:
14916 if (htab->elf.tls_sec != NULL)
14917 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14918 goto dodyn;
14919
14920 case R_PPC64_DTPREL64:
14921 if (htab->elf.tls_sec != NULL)
14922 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14923 /* Fall through. */
14924
14925 /* Relocations that may need to be propagated if this is a
14926 dynamic object. */
14927 case R_PPC64_REL30:
14928 case R_PPC64_REL32:
14929 case R_PPC64_REL64:
14930 case R_PPC64_ADDR14:
14931 case R_PPC64_ADDR14_BRNTAKEN:
14932 case R_PPC64_ADDR14_BRTAKEN:
14933 case R_PPC64_ADDR16:
14934 case R_PPC64_ADDR16_DS:
14935 case R_PPC64_ADDR16_HA:
14936 case R_PPC64_ADDR16_HI:
14937 case R_PPC64_ADDR16_HIGH:
14938 case R_PPC64_ADDR16_HIGHA:
14939 case R_PPC64_ADDR16_HIGHER:
14940 case R_PPC64_ADDR16_HIGHERA:
14941 case R_PPC64_ADDR16_HIGHEST:
14942 case R_PPC64_ADDR16_HIGHESTA:
14943 case R_PPC64_ADDR16_LO:
14944 case R_PPC64_ADDR16_LO_DS:
14945 case R_PPC64_ADDR24:
14946 case R_PPC64_ADDR32:
14947 case R_PPC64_ADDR64:
14948 case R_PPC64_UADDR16:
14949 case R_PPC64_UADDR32:
14950 case R_PPC64_UADDR64:
14951 dodyn:
14952 if ((input_section->flags & SEC_ALLOC) == 0)
14953 break;
14954
14955 if (NO_OPD_RELOCS && is_opd)
14956 break;
14957
14958 if (bfd_link_pic (info)
14959 ? ((h == NULL
14960 || h->dyn_relocs != NULL)
14961 && ((h != NULL && pc_dynrelocs (h))
14962 || must_be_dyn_reloc (info, r_type)))
14963 : (h != NULL
14964 ? h->dyn_relocs != NULL
14965 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14966 {
14967 bfd_boolean skip, relocate;
14968 asection *sreloc;
14969 bfd_vma out_off;
14970 long indx = 0;
14971
14972 /* When generating a dynamic object, these relocations
14973 are copied into the output file to be resolved at run
14974 time. */
14975
14976 skip = FALSE;
14977 relocate = FALSE;
14978
14979 out_off = _bfd_elf_section_offset (output_bfd, info,
14980 input_section, rel->r_offset);
14981 if (out_off == (bfd_vma) -1)
14982 skip = TRUE;
14983 else if (out_off == (bfd_vma) -2)
14984 skip = TRUE, relocate = TRUE;
14985 out_off += (input_section->output_section->vma
14986 + input_section->output_offset);
14987 outrel.r_offset = out_off;
14988 outrel.r_addend = rel->r_addend;
14989
14990 /* Optimize unaligned reloc use. */
14991 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14992 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14993 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14994 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14995 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14996 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14997 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14998 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14999 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
15000
15001 if (skip)
15002 memset (&outrel, 0, sizeof outrel);
15003 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
15004 && !is_opd
15005 && r_type != R_PPC64_TOC)
15006 {
15007 indx = h->elf.dynindx;
15008 BFD_ASSERT (indx != -1);
15009 outrel.r_info = ELF64_R_INFO (indx, r_type);
15010 }
15011 else
15012 {
15013 /* This symbol is local, or marked to become local,
15014 or this is an opd section reloc which must point
15015 at a local function. */
15016 outrel.r_addend += relocation;
15017 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
15018 {
15019 if (is_opd && h != NULL)
15020 {
15021 /* Lie about opd entries. This case occurs
15022 when building shared libraries and we
15023 reference a function in another shared
15024 lib. The same thing happens for a weak
15025 definition in an application that's
15026 overridden by a strong definition in a
15027 shared lib. (I believe this is a generic
15028 bug in binutils handling of weak syms.)
15029 In these cases we won't use the opd
15030 entry in this lib. */
15031 unresolved_reloc = FALSE;
15032 }
15033 if (!is_opd
15034 && r_type == R_PPC64_ADDR64
15035 && (h != NULL
15036 ? h->elf.type == STT_GNU_IFUNC
15037 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15038 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15039 else
15040 {
15041 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15042
15043 /* We need to relocate .opd contents for ld.so.
15044 Prelink also wants simple and consistent rules
15045 for relocs. This make all RELATIVE relocs have
15046 *r_offset equal to r_addend. */
15047 relocate = TRUE;
15048 }
15049 }
15050 else
15051 {
15052 if (h != NULL
15053 ? h->elf.type == STT_GNU_IFUNC
15054 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15055 {
15056 info->callbacks->einfo
15057 /* xgettext:c-format */
15058 (_("%H: %s for indirect "
15059 "function `%T' unsupported\n"),
15060 input_bfd, input_section, rel->r_offset,
15061 ppc64_elf_howto_table[r_type]->name,
15062 sym_name);
15063 ret = FALSE;
15064 }
15065 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15066 ;
15067 else if (sec == NULL || sec->owner == NULL)
15068 {
15069 bfd_set_error (bfd_error_bad_value);
15070 return FALSE;
15071 }
15072 else
15073 {
15074 asection *osec;
15075
15076 osec = sec->output_section;
15077 indx = elf_section_data (osec)->dynindx;
15078
15079 if (indx == 0)
15080 {
15081 if ((osec->flags & SEC_READONLY) == 0
15082 && htab->elf.data_index_section != NULL)
15083 osec = htab->elf.data_index_section;
15084 else
15085 osec = htab->elf.text_index_section;
15086 indx = elf_section_data (osec)->dynindx;
15087 }
15088 BFD_ASSERT (indx != 0);
15089
15090 /* We are turning this relocation into one
15091 against a section symbol, so subtract out
15092 the output section's address but not the
15093 offset of the input section in the output
15094 section. */
15095 outrel.r_addend -= osec->vma;
15096 }
15097
15098 outrel.r_info = ELF64_R_INFO (indx, r_type);
15099 }
15100 }
15101
15102 sreloc = elf_section_data (input_section)->sreloc;
15103 if (h != NULL
15104 ? h->elf.type == STT_GNU_IFUNC
15105 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15106 {
15107 sreloc = htab->elf.irelplt;
15108 if (indx == 0)
15109 htab->local_ifunc_resolver = 1;
15110 else if (is_static_defined (&h->elf))
15111 htab->maybe_local_ifunc_resolver = 1;
15112 }
15113 if (sreloc == NULL)
15114 abort ();
15115
15116 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15117 >= sreloc->size)
15118 abort ();
15119 loc = sreloc->contents;
15120 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15121 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15122
15123 /* If this reloc is against an external symbol, it will
15124 be computed at runtime, so there's no need to do
15125 anything now. However, for the sake of prelink ensure
15126 that the section contents are a known value. */
15127 if (! relocate)
15128 {
15129 unresolved_reloc = FALSE;
15130 /* The value chosen here is quite arbitrary as ld.so
15131 ignores section contents except for the special
15132 case of .opd where the contents might be accessed
15133 before relocation. Choose zero, as that won't
15134 cause reloc overflow. */
15135 relocation = 0;
15136 addend = 0;
15137 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15138 to improve backward compatibility with older
15139 versions of ld. */
15140 if (r_type == R_PPC64_ADDR64)
15141 addend = outrel.r_addend;
15142 /* Adjust pc_relative relocs to have zero in *r_offset. */
15143 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15144 addend = outrel.r_offset;
15145 }
15146 }
15147 break;
15148
15149 case R_PPC64_COPY:
15150 case R_PPC64_GLOB_DAT:
15151 case R_PPC64_JMP_SLOT:
15152 case R_PPC64_JMP_IREL:
15153 case R_PPC64_RELATIVE:
15154 /* We shouldn't ever see these dynamic relocs in relocatable
15155 files. */
15156 /* Fall through. */
15157
15158 case R_PPC64_PLTGOT16:
15159 case R_PPC64_PLTGOT16_DS:
15160 case R_PPC64_PLTGOT16_HA:
15161 case R_PPC64_PLTGOT16_HI:
15162 case R_PPC64_PLTGOT16_LO:
15163 case R_PPC64_PLTGOT16_LO_DS:
15164 case R_PPC64_PLTREL32:
15165 case R_PPC64_PLTREL64:
15166 /* These ones haven't been implemented yet. */
15167
15168 info->callbacks->einfo
15169 /* xgettext:c-format */
15170 (_("%P: %B: %s is not supported for `%T'\n"),
15171 input_bfd,
15172 ppc64_elf_howto_table[r_type]->name, sym_name);
15173
15174 bfd_set_error (bfd_error_invalid_operation);
15175 ret = FALSE;
15176 goto copy_reloc;
15177 }
15178
15179 /* Multi-instruction sequences that access the TOC can be
15180 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15181 to nop; addi rb,r2,x; */
15182 switch (r_type)
15183 {
15184 default:
15185 break;
15186
15187 case R_PPC64_GOT_TLSLD16_HI:
15188 case R_PPC64_GOT_TLSGD16_HI:
15189 case R_PPC64_GOT_TPREL16_HI:
15190 case R_PPC64_GOT_DTPREL16_HI:
15191 case R_PPC64_GOT16_HI:
15192 case R_PPC64_TOC16_HI:
15193 /* These relocs would only be useful if building up an
15194 offset to later add to r2, perhaps in an indexed
15195 addressing mode instruction. Don't try to optimize.
15196 Unfortunately, the possibility of someone building up an
15197 offset like this or even with the HA relocs, means that
15198 we need to check the high insn when optimizing the low
15199 insn. */
15200 break;
15201
15202 case R_PPC64_GOT_TLSLD16_HA:
15203 case R_PPC64_GOT_TLSGD16_HA:
15204 case R_PPC64_GOT_TPREL16_HA:
15205 case R_PPC64_GOT_DTPREL16_HA:
15206 case R_PPC64_GOT16_HA:
15207 case R_PPC64_TOC16_HA:
15208 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15209 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15210 {
15211 bfd_byte *p = contents + (rel->r_offset & ~3);
15212 bfd_put_32 (input_bfd, NOP, p);
15213 }
15214 break;
15215
15216 case R_PPC64_GOT_TLSLD16_LO:
15217 case R_PPC64_GOT_TLSGD16_LO:
15218 case R_PPC64_GOT_TPREL16_LO_DS:
15219 case R_PPC64_GOT_DTPREL16_LO_DS:
15220 case R_PPC64_GOT16_LO:
15221 case R_PPC64_GOT16_LO_DS:
15222 case R_PPC64_TOC16_LO:
15223 case R_PPC64_TOC16_LO_DS:
15224 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15225 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15226 {
15227 bfd_byte *p = contents + (rel->r_offset & ~3);
15228 insn = bfd_get_32 (input_bfd, p);
15229 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15230 {
15231 /* Transform addic to addi when we change reg. */
15232 insn &= ~((0x3f << 26) | (0x1f << 16));
15233 insn |= (14u << 26) | (2 << 16);
15234 }
15235 else
15236 {
15237 insn &= ~(0x1f << 16);
15238 insn |= 2 << 16;
15239 }
15240 bfd_put_32 (input_bfd, insn, p);
15241 }
15242 break;
15243 }
15244
15245 /* Do any further special processing. */
15246 howto = ppc64_elf_howto_table[(int) r_type];
15247 switch (r_type)
15248 {
15249 default:
15250 break;
15251
15252 case R_PPC64_REL16_HA:
15253 case R_PPC64_REL16DX_HA:
15254 case R_PPC64_ADDR16_HA:
15255 case R_PPC64_ADDR16_HIGHA:
15256 case R_PPC64_ADDR16_HIGHERA:
15257 case R_PPC64_ADDR16_HIGHESTA:
15258 case R_PPC64_TOC16_HA:
15259 case R_PPC64_SECTOFF_HA:
15260 case R_PPC64_TPREL16_HA:
15261 case R_PPC64_TPREL16_HIGHA:
15262 case R_PPC64_TPREL16_HIGHERA:
15263 case R_PPC64_TPREL16_HIGHESTA:
15264 case R_PPC64_DTPREL16_HA:
15265 case R_PPC64_DTPREL16_HIGHA:
15266 case R_PPC64_DTPREL16_HIGHERA:
15267 case R_PPC64_DTPREL16_HIGHESTA:
15268 /* It's just possible that this symbol is a weak symbol
15269 that's not actually defined anywhere. In that case,
15270 'sec' would be NULL, and we should leave the symbol
15271 alone (it will be set to zero elsewhere in the link). */
15272 if (sec == NULL)
15273 break;
15274 /* Fall through. */
15275
15276 case R_PPC64_GOT16_HA:
15277 case R_PPC64_PLTGOT16_HA:
15278 case R_PPC64_PLT16_HA:
15279 case R_PPC64_GOT_TLSGD16_HA:
15280 case R_PPC64_GOT_TLSLD16_HA:
15281 case R_PPC64_GOT_TPREL16_HA:
15282 case R_PPC64_GOT_DTPREL16_HA:
15283 /* Add 0x10000 if sign bit in 0:15 is set.
15284 Bits 0:15 are not used. */
15285 addend += 0x8000;
15286 break;
15287
15288 case R_PPC64_ADDR16_DS:
15289 case R_PPC64_ADDR16_LO_DS:
15290 case R_PPC64_GOT16_DS:
15291 case R_PPC64_GOT16_LO_DS:
15292 case R_PPC64_PLT16_LO_DS:
15293 case R_PPC64_SECTOFF_DS:
15294 case R_PPC64_SECTOFF_LO_DS:
15295 case R_PPC64_TOC16_DS:
15296 case R_PPC64_TOC16_LO_DS:
15297 case R_PPC64_PLTGOT16_DS:
15298 case R_PPC64_PLTGOT16_LO_DS:
15299 case R_PPC64_GOT_TPREL16_DS:
15300 case R_PPC64_GOT_TPREL16_LO_DS:
15301 case R_PPC64_GOT_DTPREL16_DS:
15302 case R_PPC64_GOT_DTPREL16_LO_DS:
15303 case R_PPC64_TPREL16_DS:
15304 case R_PPC64_TPREL16_LO_DS:
15305 case R_PPC64_DTPREL16_DS:
15306 case R_PPC64_DTPREL16_LO_DS:
15307 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15308 mask = 3;
15309 /* If this reloc is against an lq, lxv, or stxv insn, then
15310 the value must be a multiple of 16. This is somewhat of
15311 a hack, but the "correct" way to do this by defining _DQ
15312 forms of all the _DS relocs bloats all reloc switches in
15313 this file. It doesn't make much sense to use these
15314 relocs in data, so testing the insn should be safe. */
15315 if ((insn & (0x3f << 26)) == (56u << 26)
15316 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15317 mask = 15;
15318 relocation += addend;
15319 addend = insn & (mask ^ 3);
15320 if ((relocation & mask) != 0)
15321 {
15322 relocation ^= relocation & mask;
15323 info->callbacks->einfo
15324 /* xgettext:c-format */
15325 (_("%H: error: %s not a multiple of %u\n"),
15326 input_bfd, input_section, rel->r_offset,
15327 howto->name,
15328 mask + 1);
15329 bfd_set_error (bfd_error_bad_value);
15330 ret = FALSE;
15331 goto copy_reloc;
15332 }
15333 break;
15334 }
15335
15336 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15337 because such sections are not SEC_ALLOC and thus ld.so will
15338 not process them. */
15339 if (unresolved_reloc
15340 && !((input_section->flags & SEC_DEBUGGING) != 0
15341 && h->elf.def_dynamic)
15342 && _bfd_elf_section_offset (output_bfd, info, input_section,
15343 rel->r_offset) != (bfd_vma) -1)
15344 {
15345 info->callbacks->einfo
15346 /* xgettext:c-format */
15347 (_("%H: unresolvable %s against `%T'\n"),
15348 input_bfd, input_section, rel->r_offset,
15349 howto->name,
15350 h->elf.root.root.string);
15351 ret = FALSE;
15352 }
15353
15354 /* 16-bit fields in insns mostly have signed values, but a
15355 few insns have 16-bit unsigned values. Really, we should
15356 have different reloc types. */
15357 if (howto->complain_on_overflow != complain_overflow_dont
15358 && howto->dst_mask == 0xffff
15359 && (input_section->flags & SEC_CODE) != 0)
15360 {
15361 enum complain_overflow complain = complain_overflow_signed;
15362
15363 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15364 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15365 complain = complain_overflow_bitfield;
15366 else if (howto->rightshift == 0
15367 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15368 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15369 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15370 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15371 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15372 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15373 complain = complain_overflow_unsigned;
15374 if (howto->complain_on_overflow != complain)
15375 {
15376 alt_howto = *howto;
15377 alt_howto.complain_on_overflow = complain;
15378 howto = &alt_howto;
15379 }
15380 }
15381
15382 if (r_type == R_PPC64_REL16DX_HA)
15383 {
15384 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15385 if (rel->r_offset + 4 > input_section->size)
15386 r = bfd_reloc_outofrange;
15387 else
15388 {
15389 relocation += addend;
15390 relocation -= (rel->r_offset
15391 + input_section->output_offset
15392 + input_section->output_section->vma);
15393 relocation = (bfd_signed_vma) relocation >> 16;
15394 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15395 insn &= ~0x1fffc1;
15396 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15397 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15398 r = bfd_reloc_ok;
15399 if (relocation + 0x8000 > 0xffff)
15400 r = bfd_reloc_overflow;
15401 }
15402 }
15403 else
15404 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15405 rel->r_offset, relocation, addend);
15406
15407 if (r != bfd_reloc_ok)
15408 {
15409 char *more_info = NULL;
15410 const char *reloc_name = howto->name;
15411
15412 if (reloc_dest != DEST_NORMAL)
15413 {
15414 more_info = bfd_malloc (strlen (reloc_name) + 8);
15415 if (more_info != NULL)
15416 {
15417 strcpy (more_info, reloc_name);
15418 strcat (more_info, (reloc_dest == DEST_OPD
15419 ? " (OPD)" : " (stub)"));
15420 reloc_name = more_info;
15421 }
15422 }
15423
15424 if (r == bfd_reloc_overflow)
15425 {
15426 /* On code like "if (foo) foo();" don't report overflow
15427 on a branch to zero when foo is undefined. */
15428 if (!warned
15429 && (reloc_dest == DEST_STUB
15430 || !(h != NULL
15431 && (h->elf.root.type == bfd_link_hash_undefweak
15432 || h->elf.root.type == bfd_link_hash_undefined)
15433 && is_branch_reloc (r_type))))
15434 info->callbacks->reloc_overflow (info, &h->elf.root,
15435 sym_name, reloc_name,
15436 orig_rel.r_addend,
15437 input_bfd, input_section,
15438 rel->r_offset);
15439 }
15440 else
15441 {
15442 info->callbacks->einfo
15443 /* xgettext:c-format */
15444 (_("%H: %s against `%T': error %d\n"),
15445 input_bfd, input_section, rel->r_offset,
15446 reloc_name, sym_name, (int) r);
15447 ret = FALSE;
15448 }
15449 if (more_info != NULL)
15450 free (more_info);
15451 }
15452 copy_reloc:
15453 if (wrel != rel)
15454 *wrel = *rel;
15455 }
15456
15457 if (wrel != rel)
15458 {
15459 Elf_Internal_Shdr *rel_hdr;
15460 size_t deleted = rel - wrel;
15461
15462 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15463 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15464 if (rel_hdr->sh_size == 0)
15465 {
15466 /* It is too late to remove an empty reloc section. Leave
15467 one NONE reloc.
15468 ??? What is wrong with an empty section??? */
15469 rel_hdr->sh_size = rel_hdr->sh_entsize;
15470 deleted -= 1;
15471 }
15472 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15473 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15474 input_section->reloc_count -= deleted;
15475 }
15476
15477 /* If we're emitting relocations, then shortly after this function
15478 returns, reloc offsets and addends for this section will be
15479 adjusted. Worse, reloc symbol indices will be for the output
15480 file rather than the input. Save a copy of the relocs for
15481 opd_entry_value. */
15482 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15483 {
15484 bfd_size_type amt;
15485 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15486 rel = bfd_alloc (input_bfd, amt);
15487 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15488 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15489 if (rel == NULL)
15490 return FALSE;
15491 memcpy (rel, relocs, amt);
15492 }
15493 return ret;
15494 }
15495
15496 /* Adjust the value of any local symbols in opd sections. */
15497
15498 static int
15499 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15500 const char *name ATTRIBUTE_UNUSED,
15501 Elf_Internal_Sym *elfsym,
15502 asection *input_sec,
15503 struct elf_link_hash_entry *h)
15504 {
15505 struct _opd_sec_data *opd;
15506 long adjust;
15507 bfd_vma value;
15508
15509 if (h != NULL)
15510 return 1;
15511
15512 opd = get_opd_info (input_sec);
15513 if (opd == NULL || opd->adjust == NULL)
15514 return 1;
15515
15516 value = elfsym->st_value - input_sec->output_offset;
15517 if (!bfd_link_relocatable (info))
15518 value -= input_sec->output_section->vma;
15519
15520 adjust = opd->adjust[OPD_NDX (value)];
15521 if (adjust == -1)
15522 return 2;
15523
15524 elfsym->st_value += adjust;
15525 return 1;
15526 }
15527
15528 /* Finish up dynamic symbol handling. We set the contents of various
15529 dynamic sections here. */
15530
15531 static bfd_boolean
15532 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15533 struct bfd_link_info *info,
15534 struct elf_link_hash_entry *h,
15535 Elf_Internal_Sym *sym)
15536 {
15537 struct ppc_link_hash_table *htab;
15538 struct plt_entry *ent;
15539 Elf_Internal_Rela rela;
15540 bfd_byte *loc;
15541
15542 htab = ppc_hash_table (info);
15543 if (htab == NULL)
15544 return FALSE;
15545
15546 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15547 if (ent->plt.offset != (bfd_vma) -1)
15548 {
15549 /* This symbol has an entry in the procedure linkage
15550 table. Set it up. */
15551 if (!htab->elf.dynamic_sections_created
15552 || h->dynindx == -1)
15553 {
15554 BFD_ASSERT (h->type == STT_GNU_IFUNC
15555 && h->def_regular
15556 && (h->root.type == bfd_link_hash_defined
15557 || h->root.type == bfd_link_hash_defweak));
15558 rela.r_offset = (htab->elf.iplt->output_section->vma
15559 + htab->elf.iplt->output_offset
15560 + ent->plt.offset);
15561 if (htab->opd_abi)
15562 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15563 else
15564 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15565 rela.r_addend = (h->root.u.def.value
15566 + h->root.u.def.section->output_offset
15567 + h->root.u.def.section->output_section->vma
15568 + ent->addend);
15569 loc = (htab->elf.irelplt->contents
15570 + (htab->elf.irelplt->reloc_count++
15571 * sizeof (Elf64_External_Rela)));
15572 htab->local_ifunc_resolver = 1;
15573 }
15574 else
15575 {
15576 rela.r_offset = (htab->elf.splt->output_section->vma
15577 + htab->elf.splt->output_offset
15578 + ent->plt.offset);
15579 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15580 rela.r_addend = ent->addend;
15581 loc = (htab->elf.srelplt->contents
15582 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15583 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15584 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15585 htab->maybe_local_ifunc_resolver = 1;
15586 }
15587 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15588
15589 if (!htab->opd_abi)
15590 {
15591 if (!h->def_regular)
15592 {
15593 /* Mark the symbol as undefined, rather than as
15594 defined in glink. Leave the value if there were
15595 any relocations where pointer equality matters
15596 (this is a clue for the dynamic linker, to make
15597 function pointer comparisons work between an
15598 application and shared library), otherwise set it
15599 to zero. */
15600 sym->st_shndx = SHN_UNDEF;
15601 if (!h->pointer_equality_needed)
15602 sym->st_value = 0;
15603 else if (!h->ref_regular_nonweak)
15604 {
15605 /* This breaks function pointer comparisons, but
15606 that is better than breaking tests for a NULL
15607 function pointer. */
15608 sym->st_value = 0;
15609 }
15610 }
15611 }
15612 }
15613
15614 if (h->needs_copy)
15615 {
15616 /* This symbol needs a copy reloc. Set it up. */
15617 asection *srel;
15618
15619 if (h->dynindx == -1
15620 || (h->root.type != bfd_link_hash_defined
15621 && h->root.type != bfd_link_hash_defweak)
15622 || htab->elf.srelbss == NULL
15623 || htab->elf.sreldynrelro == NULL)
15624 abort ();
15625
15626 rela.r_offset = (h->root.u.def.value
15627 + h->root.u.def.section->output_section->vma
15628 + h->root.u.def.section->output_offset);
15629 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15630 rela.r_addend = 0;
15631 if (h->root.u.def.section == htab->elf.sdynrelro)
15632 srel = htab->elf.sreldynrelro;
15633 else
15634 srel = htab->elf.srelbss;
15635 loc = srel->contents;
15636 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15637 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15638 }
15639
15640 return TRUE;
15641 }
15642
15643 /* Used to decide how to sort relocs in an optimal manner for the
15644 dynamic linker, before writing them out. */
15645
15646 static enum elf_reloc_type_class
15647 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15648 const asection *rel_sec,
15649 const Elf_Internal_Rela *rela)
15650 {
15651 enum elf_ppc64_reloc_type r_type;
15652 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15653
15654 if (rel_sec == htab->elf.irelplt)
15655 return reloc_class_ifunc;
15656
15657 r_type = ELF64_R_TYPE (rela->r_info);
15658 switch (r_type)
15659 {
15660 case R_PPC64_RELATIVE:
15661 return reloc_class_relative;
15662 case R_PPC64_JMP_SLOT:
15663 return reloc_class_plt;
15664 case R_PPC64_COPY:
15665 return reloc_class_copy;
15666 default:
15667 return reloc_class_normal;
15668 }
15669 }
15670
15671 /* Finish up the dynamic sections. */
15672
15673 static bfd_boolean
15674 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15675 struct bfd_link_info *info)
15676 {
15677 struct ppc_link_hash_table *htab;
15678 bfd *dynobj;
15679 asection *sdyn;
15680
15681 htab = ppc_hash_table (info);
15682 if (htab == NULL)
15683 return FALSE;
15684
15685 dynobj = htab->elf.dynobj;
15686 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15687
15688 if (htab->elf.dynamic_sections_created)
15689 {
15690 Elf64_External_Dyn *dyncon, *dynconend;
15691
15692 if (sdyn == NULL || htab->elf.sgot == NULL)
15693 abort ();
15694
15695 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15696 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15697 for (; dyncon < dynconend; dyncon++)
15698 {
15699 Elf_Internal_Dyn dyn;
15700 asection *s;
15701
15702 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15703
15704 switch (dyn.d_tag)
15705 {
15706 default:
15707 continue;
15708
15709 case DT_PPC64_GLINK:
15710 s = htab->glink;
15711 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15712 /* We stupidly defined DT_PPC64_GLINK to be the start
15713 of glink rather than the first entry point, which is
15714 what ld.so needs, and now have a bigger stub to
15715 support automatic multiple TOCs. */
15716 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15717 break;
15718
15719 case DT_PPC64_OPD:
15720 s = bfd_get_section_by_name (output_bfd, ".opd");
15721 if (s == NULL)
15722 continue;
15723 dyn.d_un.d_ptr = s->vma;
15724 break;
15725
15726 case DT_PPC64_OPT:
15727 if (htab->do_multi_toc && htab->multi_toc_needed)
15728 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15729 if (htab->has_plt_localentry0)
15730 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15731 break;
15732
15733 case DT_PPC64_OPDSZ:
15734 s = bfd_get_section_by_name (output_bfd, ".opd");
15735 if (s == NULL)
15736 continue;
15737 dyn.d_un.d_val = s->size;
15738 break;
15739
15740 case DT_PLTGOT:
15741 s = htab->elf.splt;
15742 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15743 break;
15744
15745 case DT_JMPREL:
15746 s = htab->elf.srelplt;
15747 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15748 break;
15749
15750 case DT_PLTRELSZ:
15751 dyn.d_un.d_val = htab->elf.srelplt->size;
15752 break;
15753
15754 case DT_TEXTREL:
15755 if (htab->local_ifunc_resolver)
15756 info->callbacks->einfo
15757 (_("%X%P: text relocations and GNU indirect "
15758 "functions will result in a segfault at runtime\n"));
15759 else if (htab->maybe_local_ifunc_resolver)
15760 info->callbacks->einfo
15761 (_("%P: warning: text relocations and GNU indirect "
15762 "functions may result in a segfault at runtime\n"));
15763 continue;
15764 }
15765
15766 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15767 }
15768 }
15769
15770 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15771 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15772 {
15773 /* Fill in the first entry in the global offset table.
15774 We use it to hold the link-time TOCbase. */
15775 bfd_put_64 (output_bfd,
15776 elf_gp (output_bfd) + TOC_BASE_OFF,
15777 htab->elf.sgot->contents);
15778
15779 /* Set .got entry size. */
15780 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15781 }
15782
15783 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15784 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15785 {
15786 /* Set .plt entry size. */
15787 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15788 = PLT_ENTRY_SIZE (htab);
15789 }
15790
15791 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15792 brlt ourselves if emitrelocations. */
15793 if (htab->brlt != NULL
15794 && htab->brlt->reloc_count != 0
15795 && !_bfd_elf_link_output_relocs (output_bfd,
15796 htab->brlt,
15797 elf_section_data (htab->brlt)->rela.hdr,
15798 elf_section_data (htab->brlt)->relocs,
15799 NULL))
15800 return FALSE;
15801
15802 if (htab->glink != NULL
15803 && htab->glink->reloc_count != 0
15804 && !_bfd_elf_link_output_relocs (output_bfd,
15805 htab->glink,
15806 elf_section_data (htab->glink)->rela.hdr,
15807 elf_section_data (htab->glink)->relocs,
15808 NULL))
15809 return FALSE;
15810
15811 if (htab->glink_eh_frame != NULL
15812 && htab->glink_eh_frame->size != 0)
15813 {
15814 bfd_vma val;
15815 bfd_byte *p;
15816 struct map_stub *group;
15817 size_t align = 4;
15818
15819 p = htab->glink_eh_frame->contents;
15820 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15821
15822 for (group = htab->group; group != NULL; group = group->next)
15823 if (group->stub_sec != NULL)
15824 {
15825 /* Offset to stub section. */
15826 val = (group->stub_sec->output_section->vma
15827 + group->stub_sec->output_offset);
15828 val -= (htab->glink_eh_frame->output_section->vma
15829 + htab->glink_eh_frame->output_offset
15830 + (p + 8 - htab->glink_eh_frame->contents));
15831 if (val + 0x80000000 > 0xffffffff)
15832 {
15833 info->callbacks->einfo
15834 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15835 group->stub_sec->name);
15836 return FALSE;
15837 }
15838 bfd_put_32 (dynobj, val, p + 8);
15839 p += stub_eh_frame_size (group, align);
15840 }
15841 if (htab->glink != NULL && htab->glink->size != 0)
15842 {
15843 /* Offset to .glink. */
15844 val = (htab->glink->output_section->vma
15845 + htab->glink->output_offset
15846 + 8);
15847 val -= (htab->glink_eh_frame->output_section->vma
15848 + htab->glink_eh_frame->output_offset
15849 + (p + 8 - htab->glink_eh_frame->contents));
15850 if (val + 0x80000000 > 0xffffffff)
15851 {
15852 info->callbacks->einfo
15853 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15854 htab->glink->name);
15855 return FALSE;
15856 }
15857 bfd_put_32 (dynobj, val, p + 8);
15858 p += (24 + align - 1) & -align;
15859 }
15860
15861 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15862 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15863 htab->glink_eh_frame,
15864 htab->glink_eh_frame->contents))
15865 return FALSE;
15866 }
15867
15868 /* We need to handle writing out multiple GOT sections ourselves,
15869 since we didn't add them to DYNOBJ. We know dynobj is the first
15870 bfd. */
15871 while ((dynobj = dynobj->link.next) != NULL)
15872 {
15873 asection *s;
15874
15875 if (!is_ppc64_elf (dynobj))
15876 continue;
15877
15878 s = ppc64_elf_tdata (dynobj)->got;
15879 if (s != NULL
15880 && s->size != 0
15881 && s->output_section != bfd_abs_section_ptr
15882 && !bfd_set_section_contents (output_bfd, s->output_section,
15883 s->contents, s->output_offset,
15884 s->size))
15885 return FALSE;
15886 s = ppc64_elf_tdata (dynobj)->relgot;
15887 if (s != NULL
15888 && s->size != 0
15889 && s->output_section != bfd_abs_section_ptr
15890 && !bfd_set_section_contents (output_bfd, s->output_section,
15891 s->contents, s->output_offset,
15892 s->size))
15893 return FALSE;
15894 }
15895
15896 return TRUE;
15897 }
15898
15899 #include "elf64-target.h"
15900
15901 /* FreeBSD support */
15902
15903 #undef TARGET_LITTLE_SYM
15904 #undef TARGET_LITTLE_NAME
15905
15906 #undef TARGET_BIG_SYM
15907 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15908 #undef TARGET_BIG_NAME
15909 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15910
15911 #undef ELF_OSABI
15912 #define ELF_OSABI ELFOSABI_FREEBSD
15913
15914 #undef elf64_bed
15915 #define elf64_bed elf64_powerpc_fbsd_bed
15916
15917 #include "elf64-target.h"
GDB Binutils - Deliverables
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