projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
PowerPC64 stubs don't match calculated size
[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
3789 function selects those that must be copied when linking a shared
3790 library or PIE, 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 /* Only relative relocs can be resolved when the object load
3800 address isn't fixed. DTPREL64 is excluded because the
3801 dynamic linker needs to differentiate global dynamic from
3802 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3803 return 1;
3804
3805 case R_PPC64_REL32:
3806 case R_PPC64_REL64:
3807 case R_PPC64_REL30:
3808 return 0;
3809
3810 case R_PPC64_TPREL16:
3811 case R_PPC64_TPREL16_LO:
3812 case R_PPC64_TPREL16_HI:
3813 case R_PPC64_TPREL16_HA:
3814 case R_PPC64_TPREL16_DS:
3815 case R_PPC64_TPREL16_LO_DS:
3816 case R_PPC64_TPREL16_HIGH:
3817 case R_PPC64_TPREL16_HIGHA:
3818 case R_PPC64_TPREL16_HIGHER:
3819 case R_PPC64_TPREL16_HIGHERA:
3820 case R_PPC64_TPREL16_HIGHEST:
3821 case R_PPC64_TPREL16_HIGHESTA:
3822 case R_PPC64_TPREL64:
3823 /* These relocations are relative but in a shared library the
3824 linker doesn't know the thread pointer base. */
3825 return bfd_link_dll (info);
3826 }
3827 }
3828
3829 /* Whether an undefined weak symbol should resolve to its link-time
3830 value, even in PIC or PIE objects. */
3831 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3832 ((H)->root.type == bfd_link_hash_undefweak \
3833 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3834 || (INFO)->dynamic_undefined_weak == 0))
3835
3836 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3837 copying dynamic variables from a shared lib into an app's dynbss
3838 section, and instead use a dynamic relocation to point into the
3839 shared lib. With code that gcc generates, it's vital that this be
3840 enabled; In the PowerPC64 ABI, the address of a function is actually
3841 the address of a function descriptor, which resides in the .opd
3842 section. gcc uses the descriptor directly rather than going via the
3843 GOT as some other ABI's do, which means that initialized function
3844 pointers must reference the descriptor. Thus, a function pointer
3845 initialized to the address of a function in a shared library will
3846 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3847 redefines the function descriptor symbol to point to the copy. This
3848 presents a problem as a plt entry for that function is also
3849 initialized from the function descriptor symbol and the copy reloc
3850 may not be initialized first. */
3851 #define ELIMINATE_COPY_RELOCS 1
3852
3853 /* Section name for stubs is the associated section name plus this
3854 string. */
3855 #define STUB_SUFFIX ".stub"
3856
3857 /* Linker stubs.
3858 ppc_stub_long_branch:
3859 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3860 destination, but a 24 bit branch in a stub section will reach.
3861 . b dest
3862
3863 ppc_stub_plt_branch:
3864 Similar to the above, but a 24 bit branch in the stub section won't
3865 reach its destination.
3866 . addis %r11,%r2,xxx@toc@ha
3867 . ld %r12,xxx@toc@l(%r11)
3868 . mtctr %r12
3869 . bctr
3870
3871 ppc_stub_plt_call:
3872 Used to call a function in a shared library. If it so happens that
3873 the plt entry referenced crosses a 64k boundary, then an extra
3874 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3875 . std %r2,40(%r1)
3876 . addis %r11,%r2,xxx@toc@ha
3877 . ld %r12,xxx+0@toc@l(%r11)
3878 . mtctr %r12
3879 . ld %r2,xxx+8@toc@l(%r11)
3880 . ld %r11,xxx+16@toc@l(%r11)
3881 . bctr
3882
3883 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3884 code to adjust the value and save r2 to support multiple toc sections.
3885 A ppc_stub_long_branch with an r2 offset looks like:
3886 . std %r2,40(%r1)
3887 . addis %r2,%r2,off@ha
3888 . addi %r2,%r2,off@l
3889 . b dest
3890
3891 A ppc_stub_plt_branch with an r2 offset looks like:
3892 . std %r2,40(%r1)
3893 . addis %r11,%r2,xxx@toc@ha
3894 . ld %r12,xxx@toc@l(%r11)
3895 . addis %r2,%r2,off@ha
3896 . addi %r2,%r2,off@l
3897 . mtctr %r12
3898 . bctr
3899
3900 In cases where the "addis" instruction would add zero, the "addis" is
3901 omitted and following instructions modified slightly in some cases.
3902 */
3903
3904 enum ppc_stub_type {
3905 ppc_stub_none,
3906 ppc_stub_long_branch,
3907 ppc_stub_long_branch_r2off,
3908 ppc_stub_plt_branch,
3909 ppc_stub_plt_branch_r2off,
3910 ppc_stub_plt_call,
3911 ppc_stub_plt_call_r2save,
3912 ppc_stub_global_entry,
3913 ppc_stub_save_res
3914 };
3915
3916 /* Information on stub grouping. */
3917 struct map_stub
3918 {
3919 /* The stub section. */
3920 asection *stub_sec;
3921 /* This is the section to which stubs in the group will be attached. */
3922 asection *link_sec;
3923 /* Next group. */
3924 struct map_stub *next;
3925 /* Whether to emit a copy of register save/restore functions in this
3926 group. */
3927 int needs_save_res;
3928 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3929 or -1u if no such stub with bctrl exists. */
3930 unsigned int tls_get_addr_opt_bctrl;
3931 };
3932
3933 struct ppc_stub_hash_entry {
3934
3935 /* Base hash table entry structure. */
3936 struct bfd_hash_entry root;
3937
3938 enum ppc_stub_type stub_type;
3939
3940 /* Group information. */
3941 struct map_stub *group;
3942
3943 /* Offset within stub_sec of the beginning of this stub. */
3944 bfd_vma stub_offset;
3945
3946 /* Given the symbol's value and its section we can determine its final
3947 value when building the stubs (so the stub knows where to jump. */
3948 bfd_vma target_value;
3949 asection *target_section;
3950
3951 /* The symbol table entry, if any, that this was derived from. */
3952 struct ppc_link_hash_entry *h;
3953 struct plt_entry *plt_ent;
3954
3955 /* Symbol st_other. */
3956 unsigned char other;
3957 };
3958
3959 struct ppc_branch_hash_entry {
3960
3961 /* Base hash table entry structure. */
3962 struct bfd_hash_entry root;
3963
3964 /* Offset within branch lookup table. */
3965 unsigned int offset;
3966
3967 /* Generation marker. */
3968 unsigned int iter;
3969 };
3970
3971 /* Used to track dynamic relocations for local symbols. */
3972 struct ppc_dyn_relocs
3973 {
3974 struct ppc_dyn_relocs *next;
3975
3976 /* The input section of the reloc. */
3977 asection *sec;
3978
3979 /* Total number of relocs copied for the input section. */
3980 unsigned int count : 31;
3981
3982 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3983 unsigned int ifunc : 1;
3984 };
3985
3986 struct ppc_link_hash_entry
3987 {
3988 struct elf_link_hash_entry elf;
3989
3990 union {
3991 /* A pointer to the most recently used stub hash entry against this
3992 symbol. */
3993 struct ppc_stub_hash_entry *stub_cache;
3994
3995 /* A pointer to the next symbol starting with a '.' */
3996 struct ppc_link_hash_entry *next_dot_sym;
3997 } u;
3998
3999 /* Track dynamic relocs copied for this symbol. */
4000 struct elf_dyn_relocs *dyn_relocs;
4001
4002 /* Chain of aliases referring to a weakdef. */
4003 struct ppc_link_hash_entry *weakref;
4004
4005 /* Link between function code and descriptor symbols. */
4006 struct ppc_link_hash_entry *oh;
4007
4008 /* Flag function code and descriptor symbols. */
4009 unsigned int is_func:1;
4010 unsigned int is_func_descriptor:1;
4011 unsigned int fake:1;
4012
4013 /* Whether global opd/toc sym has been adjusted or not.
4014 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4015 should be set for all globals defined in any opd/toc section. */
4016 unsigned int adjust_done:1;
4017
4018 /* Set if this is an out-of-line register save/restore function,
4019 with non-standard calling convention. */
4020 unsigned int save_res:1;
4021
4022 /* Set if a duplicate symbol with non-zero localentry is detected,
4023 even when the duplicate symbol does not provide a definition. */
4024 unsigned int non_zero_localentry:1;
4025
4026 /* Contexts in which symbol is used in the GOT (or TOC).
4027 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4028 corresponding relocs are encountered during check_relocs.
4029 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4030 indicate the corresponding GOT entry type is not needed.
4031 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4032 a TPREL one. We use a separate flag rather than setting TPREL
4033 just for convenience in distinguishing the two cases. */
4034 #define TLS_GD 1 /* GD reloc. */
4035 #define TLS_LD 2 /* LD reloc. */
4036 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4037 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4038 #define TLS_TLS 16 /* Any TLS reloc. */
4039 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4040 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4041 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4042 unsigned char tls_mask;
4043 };
4044
4045 /* ppc64 ELF linker hash table. */
4046
4047 struct ppc_link_hash_table
4048 {
4049 struct elf_link_hash_table elf;
4050
4051 /* The stub hash table. */
4052 struct bfd_hash_table stub_hash_table;
4053
4054 /* Another hash table for plt_branch stubs. */
4055 struct bfd_hash_table branch_hash_table;
4056
4057 /* Hash table for function prologue tocsave. */
4058 htab_t tocsave_htab;
4059
4060 /* Various options and other info passed from the linker. */
4061 struct ppc64_elf_params *params;
4062
4063 /* The size of sec_info below. */
4064 unsigned int sec_info_arr_size;
4065
4066 /* Per-section array of extra section info. Done this way rather
4067 than as part of ppc64_elf_section_data so we have the info for
4068 non-ppc64 sections. */
4069 struct
4070 {
4071 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4072 bfd_vma toc_off;
4073
4074 union
4075 {
4076 /* The section group that this section belongs to. */
4077 struct map_stub *group;
4078 /* A temp section list pointer. */
4079 asection *list;
4080 } u;
4081 } *sec_info;
4082
4083 /* Linked list of groups. */
4084 struct map_stub *group;
4085
4086 /* Temp used when calculating TOC pointers. */
4087 bfd_vma toc_curr;
4088 bfd *toc_bfd;
4089 asection *toc_first_sec;
4090
4091 /* Used when adding symbols. */
4092 struct ppc_link_hash_entry *dot_syms;
4093
4094 /* Shortcuts to get to dynamic linker sections. */
4095 asection *glink;
4096 asection *sfpr;
4097 asection *brlt;
4098 asection *relbrlt;
4099 asection *glink_eh_frame;
4100
4101 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4102 struct ppc_link_hash_entry *tls_get_addr;
4103 struct ppc_link_hash_entry *tls_get_addr_fd;
4104
4105 /* The size of reliplt used by got entry relocs. */
4106 bfd_size_type got_reli_size;
4107
4108 /* Statistics. */
4109 unsigned long stub_count[ppc_stub_global_entry];
4110
4111 /* Number of stubs against global syms. */
4112 unsigned long stub_globals;
4113
4114 /* Set if we're linking code with function descriptors. */
4115 unsigned int opd_abi:1;
4116
4117 /* Support for multiple toc sections. */
4118 unsigned int do_multi_toc:1;
4119 unsigned int multi_toc_needed:1;
4120 unsigned int second_toc_pass:1;
4121 unsigned int do_toc_opt:1;
4122
4123 /* Set if tls optimization is enabled. */
4124 unsigned int do_tls_opt:1;
4125
4126 /* Set on error. */
4127 unsigned int stub_error:1;
4128
4129 /* Whether func_desc_adjust needs to be run over symbols. */
4130 unsigned int need_func_desc_adj:1;
4131
4132 /* Whether there exist local gnu indirect function resolvers,
4133 referenced by dynamic relocations. */
4134 unsigned int local_ifunc_resolver:1;
4135 unsigned int maybe_local_ifunc_resolver:1;
4136
4137 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4138 unsigned int has_plt_localentry0:1;
4139
4140 /* Incremented every time we size stubs. */
4141 unsigned int stub_iteration;
4142
4143 /* Small local sym cache. */
4144 struct sym_cache sym_cache;
4145 };
4146
4147 /* Rename some of the generic section flags to better document how they
4148 are used here. */
4149
4150 /* Nonzero if this section has TLS related relocations. */
4151 #define has_tls_reloc sec_flg0
4152
4153 /* Nonzero if this section has a call to __tls_get_addr. */
4154 #define has_tls_get_addr_call sec_flg1
4155
4156 /* Nonzero if this section has any toc or got relocs. */
4157 #define has_toc_reloc sec_flg2
4158
4159 /* Nonzero if this section has a call to another section that uses
4160 the toc or got. */
4161 #define makes_toc_func_call sec_flg3
4162
4163 /* Recursion protection when determining above flag. */
4164 #define call_check_in_progress sec_flg4
4165 #define call_check_done sec_flg5
4166
4167 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4168
4169 #define ppc_hash_table(p) \
4170 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4171 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4172
4173 #define ppc_stub_hash_lookup(table, string, create, copy) \
4174 ((struct ppc_stub_hash_entry *) \
4175 bfd_hash_lookup ((table), (string), (create), (copy)))
4176
4177 #define ppc_branch_hash_lookup(table, string, create, copy) \
4178 ((struct ppc_branch_hash_entry *) \
4179 bfd_hash_lookup ((table), (string), (create), (copy)))
4180
4181 /* Create an entry in the stub hash table. */
4182
4183 static struct bfd_hash_entry *
4184 stub_hash_newfunc (struct bfd_hash_entry *entry,
4185 struct bfd_hash_table *table,
4186 const char *string)
4187 {
4188 /* Allocate the structure if it has not already been allocated by a
4189 subclass. */
4190 if (entry == NULL)
4191 {
4192 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4193 if (entry == NULL)
4194 return entry;
4195 }
4196
4197 /* Call the allocation method of the superclass. */
4198 entry = bfd_hash_newfunc (entry, table, string);
4199 if (entry != NULL)
4200 {
4201 struct ppc_stub_hash_entry *eh;
4202
4203 /* Initialize the local fields. */
4204 eh = (struct ppc_stub_hash_entry *) entry;
4205 eh->stub_type = ppc_stub_none;
4206 eh->group = NULL;
4207 eh->stub_offset = 0;
4208 eh->target_value = 0;
4209 eh->target_section = NULL;
4210 eh->h = NULL;
4211 eh->plt_ent = NULL;
4212 eh->other = 0;
4213 }
4214
4215 return entry;
4216 }
4217
4218 /* Create an entry in the branch hash table. */
4219
4220 static struct bfd_hash_entry *
4221 branch_hash_newfunc (struct bfd_hash_entry *entry,
4222 struct bfd_hash_table *table,
4223 const char *string)
4224 {
4225 /* Allocate the structure if it has not already been allocated by a
4226 subclass. */
4227 if (entry == NULL)
4228 {
4229 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4230 if (entry == NULL)
4231 return entry;
4232 }
4233
4234 /* Call the allocation method of the superclass. */
4235 entry = bfd_hash_newfunc (entry, table, string);
4236 if (entry != NULL)
4237 {
4238 struct ppc_branch_hash_entry *eh;
4239
4240 /* Initialize the local fields. */
4241 eh = (struct ppc_branch_hash_entry *) entry;
4242 eh->offset = 0;
4243 eh->iter = 0;
4244 }
4245
4246 return entry;
4247 }
4248
4249 /* Create an entry in a ppc64 ELF linker hash table. */
4250
4251 static struct bfd_hash_entry *
4252 link_hash_newfunc (struct bfd_hash_entry *entry,
4253 struct bfd_hash_table *table,
4254 const char *string)
4255 {
4256 /* Allocate the structure if it has not already been allocated by a
4257 subclass. */
4258 if (entry == NULL)
4259 {
4260 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4261 if (entry == NULL)
4262 return entry;
4263 }
4264
4265 /* Call the allocation method of the superclass. */
4266 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4267 if (entry != NULL)
4268 {
4269 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4270
4271 memset (&eh->u.stub_cache, 0,
4272 (sizeof (struct ppc_link_hash_entry)
4273 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4274
4275 /* When making function calls, old ABI code references function entry
4276 points (dot symbols), while new ABI code references the function
4277 descriptor symbol. We need to make any combination of reference and
4278 definition work together, without breaking archive linking.
4279
4280 For a defined function "foo" and an undefined call to "bar":
4281 An old object defines "foo" and ".foo", references ".bar" (possibly
4282 "bar" too).
4283 A new object defines "foo" and references "bar".
4284
4285 A new object thus has no problem with its undefined symbols being
4286 satisfied by definitions in an old object. On the other hand, the
4287 old object won't have ".bar" satisfied by a new object.
4288
4289 Keep a list of newly added dot-symbols. */
4290
4291 if (string[0] == '.')
4292 {
4293 struct ppc_link_hash_table *htab;
4294
4295 htab = (struct ppc_link_hash_table *) table;
4296 eh->u.next_dot_sym = htab->dot_syms;
4297 htab->dot_syms = eh;
4298 }
4299 }
4300
4301 return entry;
4302 }
4303
4304 struct tocsave_entry {
4305 asection *sec;
4306 bfd_vma offset;
4307 };
4308
4309 static hashval_t
4310 tocsave_htab_hash (const void *p)
4311 {
4312 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4313 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4314 }
4315
4316 static int
4317 tocsave_htab_eq (const void *p1, const void *p2)
4318 {
4319 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4320 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4321 return e1->sec == e2->sec && e1->offset == e2->offset;
4322 }
4323
4324 /* Destroy a ppc64 ELF linker hash table. */
4325
4326 static void
4327 ppc64_elf_link_hash_table_free (bfd *obfd)
4328 {
4329 struct ppc_link_hash_table *htab;
4330
4331 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4332 if (htab->tocsave_htab)
4333 htab_delete (htab->tocsave_htab);
4334 bfd_hash_table_free (&htab->branch_hash_table);
4335 bfd_hash_table_free (&htab->stub_hash_table);
4336 _bfd_elf_link_hash_table_free (obfd);
4337 }
4338
4339 /* Create a ppc64 ELF linker hash table. */
4340
4341 static struct bfd_link_hash_table *
4342 ppc64_elf_link_hash_table_create (bfd *abfd)
4343 {
4344 struct ppc_link_hash_table *htab;
4345 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4346
4347 htab = bfd_zmalloc (amt);
4348 if (htab == NULL)
4349 return NULL;
4350
4351 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4352 sizeof (struct ppc_link_hash_entry),
4353 PPC64_ELF_DATA))
4354 {
4355 free (htab);
4356 return NULL;
4357 }
4358
4359 /* Init the stub hash table too. */
4360 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4361 sizeof (struct ppc_stub_hash_entry)))
4362 {
4363 _bfd_elf_link_hash_table_free (abfd);
4364 return NULL;
4365 }
4366
4367 /* And the branch hash table. */
4368 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4369 sizeof (struct ppc_branch_hash_entry)))
4370 {
4371 bfd_hash_table_free (&htab->stub_hash_table);
4372 _bfd_elf_link_hash_table_free (abfd);
4373 return NULL;
4374 }
4375
4376 htab->tocsave_htab = htab_try_create (1024,
4377 tocsave_htab_hash,
4378 tocsave_htab_eq,
4379 NULL);
4380 if (htab->tocsave_htab == NULL)
4381 {
4382 ppc64_elf_link_hash_table_free (abfd);
4383 return NULL;
4384 }
4385 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4386
4387 /* Initializing two fields of the union is just cosmetic. We really
4388 only care about glist, but when compiled on a 32-bit host the
4389 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4390 debugger inspection of these fields look nicer. */
4391 htab->elf.init_got_refcount.refcount = 0;
4392 htab->elf.init_got_refcount.glist = NULL;
4393 htab->elf.init_plt_refcount.refcount = 0;
4394 htab->elf.init_plt_refcount.glist = NULL;
4395 htab->elf.init_got_offset.offset = 0;
4396 htab->elf.init_got_offset.glist = NULL;
4397 htab->elf.init_plt_offset.offset = 0;
4398 htab->elf.init_plt_offset.glist = NULL;
4399
4400 return &htab->elf.root;
4401 }
4402
4403 /* Create sections for linker generated code. */
4404
4405 static bfd_boolean
4406 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4407 {
4408 struct ppc_link_hash_table *htab;
4409 flagword flags;
4410
4411 htab = ppc_hash_table (info);
4412
4413 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4414 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4415 if (htab->params->save_restore_funcs)
4416 {
4417 /* Create .sfpr for code to save and restore fp regs. */
4418 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4419 flags);
4420 if (htab->sfpr == NULL
4421 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4422 return FALSE;
4423 }
4424
4425 if (bfd_link_relocatable (info))
4426 return TRUE;
4427
4428 /* Create .glink for lazy dynamic linking support. */
4429 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4430 flags);
4431 if (htab->glink == NULL
4432 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4433 return FALSE;
4434
4435 if (!info->no_ld_generated_unwind_info)
4436 {
4437 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4438 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4439 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4440 ".eh_frame",
4441 flags);
4442 if (htab->glink_eh_frame == NULL
4443 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4444 return FALSE;
4445 }
4446
4447 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4448 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4449 if (htab->elf.iplt == NULL
4450 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4451 return FALSE;
4452
4453 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4454 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4455 htab->elf.irelplt
4456 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4457 if (htab->elf.irelplt == NULL
4458 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4459 return FALSE;
4460
4461 /* Create branch lookup table for plt_branch stubs. */
4462 flags = (SEC_ALLOC | SEC_LOAD
4463 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4464 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4465 flags);
4466 if (htab->brlt == NULL
4467 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4468 return FALSE;
4469
4470 if (!bfd_link_pic (info))
4471 return TRUE;
4472
4473 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4474 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4475 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4476 ".rela.branch_lt",
4477 flags);
4478 if (htab->relbrlt == NULL
4479 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4480 return FALSE;
4481
4482 return TRUE;
4483 }
4484
4485 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4486
4487 bfd_boolean
4488 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4489 struct ppc64_elf_params *params)
4490 {
4491 struct ppc_link_hash_table *htab;
4492
4493 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4494
4495 /* Always hook our dynamic sections into the first bfd, which is the
4496 linker created stub bfd. This ensures that the GOT header is at
4497 the start of the output TOC section. */
4498 htab = ppc_hash_table (info);
4499 htab->elf.dynobj = params->stub_bfd;
4500 htab->params = params;
4501
4502 return create_linkage_sections (htab->elf.dynobj, info);
4503 }
4504
4505 /* Build a name for an entry in the stub hash table. */
4506
4507 static char *
4508 ppc_stub_name (const asection *input_section,
4509 const asection *sym_sec,
4510 const struct ppc_link_hash_entry *h,
4511 const Elf_Internal_Rela *rel)
4512 {
4513 char *stub_name;
4514 ssize_t len;
4515
4516 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4517 offsets from a sym as a branch target? In fact, we could
4518 probably assume the addend is always zero. */
4519 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4520
4521 if (h)
4522 {
4523 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4524 stub_name = bfd_malloc (len);
4525 if (stub_name == NULL)
4526 return stub_name;
4527
4528 len = sprintf (stub_name, "%08x.%s+%x",
4529 input_section->id & 0xffffffff,
4530 h->elf.root.root.string,
4531 (int) rel->r_addend & 0xffffffff);
4532 }
4533 else
4534 {
4535 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4536 stub_name = bfd_malloc (len);
4537 if (stub_name == NULL)
4538 return stub_name;
4539
4540 len = sprintf (stub_name, "%08x.%x:%x+%x",
4541 input_section->id & 0xffffffff,
4542 sym_sec->id & 0xffffffff,
4543 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4544 (int) rel->r_addend & 0xffffffff);
4545 }
4546 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4547 stub_name[len - 2] = 0;
4548 return stub_name;
4549 }
4550
4551 /* Look up an entry in the stub hash. Stub entries are cached because
4552 creating the stub name takes a bit of time. */
4553
4554 static struct ppc_stub_hash_entry *
4555 ppc_get_stub_entry (const asection *input_section,
4556 const asection *sym_sec,
4557 struct ppc_link_hash_entry *h,
4558 const Elf_Internal_Rela *rel,
4559 struct ppc_link_hash_table *htab)
4560 {
4561 struct ppc_stub_hash_entry *stub_entry;
4562 struct map_stub *group;
4563
4564 /* If this input section is part of a group of sections sharing one
4565 stub section, then use the id of the first section in the group.
4566 Stub names need to include a section id, as there may well be
4567 more than one stub used to reach say, printf, and we need to
4568 distinguish between them. */
4569 group = htab->sec_info[input_section->id].u.group;
4570 if (group == NULL)
4571 return NULL;
4572
4573 if (h != NULL && h->u.stub_cache != NULL
4574 && h->u.stub_cache->h == h
4575 && h->u.stub_cache->group == group)
4576 {
4577 stub_entry = h->u.stub_cache;
4578 }
4579 else
4580 {
4581 char *stub_name;
4582
4583 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4584 if (stub_name == NULL)
4585 return NULL;
4586
4587 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4588 stub_name, FALSE, FALSE);
4589 if (h != NULL)
4590 h->u.stub_cache = stub_entry;
4591
4592 free (stub_name);
4593 }
4594
4595 return stub_entry;
4596 }
4597
4598 /* Add a new stub entry to the stub hash. Not all fields of the new
4599 stub entry are initialised. */
4600
4601 static struct ppc_stub_hash_entry *
4602 ppc_add_stub (const char *stub_name,
4603 asection *section,
4604 struct bfd_link_info *info)
4605 {
4606 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4607 struct map_stub *group;
4608 asection *link_sec;
4609 asection *stub_sec;
4610 struct ppc_stub_hash_entry *stub_entry;
4611
4612 group = htab->sec_info[section->id].u.group;
4613 link_sec = group->link_sec;
4614 stub_sec = group->stub_sec;
4615 if (stub_sec == NULL)
4616 {
4617 size_t namelen;
4618 bfd_size_type len;
4619 char *s_name;
4620
4621 namelen = strlen (link_sec->name);
4622 len = namelen + sizeof (STUB_SUFFIX);
4623 s_name = bfd_alloc (htab->params->stub_bfd, len);
4624 if (s_name == NULL)
4625 return NULL;
4626
4627 memcpy (s_name, link_sec->name, namelen);
4628 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4629 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4630 if (stub_sec == NULL)
4631 return NULL;
4632 group->stub_sec = stub_sec;
4633 }
4634
4635 /* Enter this entry into the linker stub hash table. */
4636 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4637 TRUE, FALSE);
4638 if (stub_entry == NULL)
4639 {
4640 /* xgettext:c-format */
4641 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4642 section->owner, stub_name);
4643 return NULL;
4644 }
4645
4646 stub_entry->group = group;
4647 stub_entry->stub_offset = 0;
4648 return stub_entry;
4649 }
4650
4651 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4652 not already done. */
4653
4654 static bfd_boolean
4655 create_got_section (bfd *abfd, struct bfd_link_info *info)
4656 {
4657 asection *got, *relgot;
4658 flagword flags;
4659 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4660
4661 if (!is_ppc64_elf (abfd))
4662 return FALSE;
4663 if (htab == NULL)
4664 return FALSE;
4665
4666 if (!htab->elf.sgot
4667 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4668 return FALSE;
4669
4670 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4671 | SEC_LINKER_CREATED);
4672
4673 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4674 if (!got
4675 || !bfd_set_section_alignment (abfd, got, 3))
4676 return FALSE;
4677
4678 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4679 flags | SEC_READONLY);
4680 if (!relgot
4681 || ! bfd_set_section_alignment (abfd, relgot, 3))
4682 return FALSE;
4683
4684 ppc64_elf_tdata (abfd)->got = got;
4685 ppc64_elf_tdata (abfd)->relgot = relgot;
4686 return TRUE;
4687 }
4688
4689 /* Follow indirect and warning symbol links. */
4690
4691 static inline struct bfd_link_hash_entry *
4692 follow_link (struct bfd_link_hash_entry *h)
4693 {
4694 while (h->type == bfd_link_hash_indirect
4695 || h->type == bfd_link_hash_warning)
4696 h = h->u.i.link;
4697 return h;
4698 }
4699
4700 static inline struct elf_link_hash_entry *
4701 elf_follow_link (struct elf_link_hash_entry *h)
4702 {
4703 return (struct elf_link_hash_entry *) follow_link (&h->root);
4704 }
4705
4706 static inline struct ppc_link_hash_entry *
4707 ppc_follow_link (struct ppc_link_hash_entry *h)
4708 {
4709 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4710 }
4711
4712 /* Merge PLT info on FROM with that on TO. */
4713
4714 static void
4715 move_plt_plist (struct ppc_link_hash_entry *from,
4716 struct ppc_link_hash_entry *to)
4717 {
4718 if (from->elf.plt.plist != NULL)
4719 {
4720 if (to->elf.plt.plist != NULL)
4721 {
4722 struct plt_entry **entp;
4723 struct plt_entry *ent;
4724
4725 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4726 {
4727 struct plt_entry *dent;
4728
4729 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4730 if (dent->addend == ent->addend)
4731 {
4732 dent->plt.refcount += ent->plt.refcount;
4733 *entp = ent->next;
4734 break;
4735 }
4736 if (dent == NULL)
4737 entp = &ent->next;
4738 }
4739 *entp = to->elf.plt.plist;
4740 }
4741
4742 to->elf.plt.plist = from->elf.plt.plist;
4743 from->elf.plt.plist = NULL;
4744 }
4745 }
4746
4747 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4748
4749 static void
4750 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4751 struct elf_link_hash_entry *dir,
4752 struct elf_link_hash_entry *ind)
4753 {
4754 struct ppc_link_hash_entry *edir, *eind;
4755
4756 edir = (struct ppc_link_hash_entry *) dir;
4757 eind = (struct ppc_link_hash_entry *) ind;
4758
4759 edir->is_func |= eind->is_func;
4760 edir->is_func_descriptor |= eind->is_func_descriptor;
4761 edir->tls_mask |= eind->tls_mask;
4762 if (eind->oh != NULL)
4763 edir->oh = ppc_follow_link (eind->oh);
4764
4765 /* If called to transfer flags for a weakdef during processing
4766 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4767 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4768 if (!(ELIMINATE_COPY_RELOCS
4769 && eind->elf.root.type != bfd_link_hash_indirect
4770 && edir->elf.dynamic_adjusted))
4771 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4772
4773 if (edir->elf.versioned != versioned_hidden)
4774 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4775 edir->elf.ref_regular |= eind->elf.ref_regular;
4776 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4777 edir->elf.needs_plt |= eind->elf.needs_plt;
4778 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4779
4780 /* If we were called to copy over info for a weak sym, don't copy
4781 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4782 in order to simplify readonly_dynrelocs and save a field in the
4783 symbol hash entry, but that means dyn_relocs can't be used in any
4784 tests about a specific symbol, or affect other symbol flags which
4785 are then tested.
4786 Chain weakdefs so we can get from the weakdef back to an alias.
4787 The list is circular so that we don't need to use u.weakdef as
4788 well as this list to look at all aliases. */
4789 if (eind->elf.root.type != bfd_link_hash_indirect)
4790 {
4791 struct ppc_link_hash_entry *cur, *add, *next;
4792
4793 add = eind;
4794 do
4795 {
4796 cur = edir->weakref;
4797 if (cur != NULL)
4798 {
4799 do
4800 {
4801 /* We can be called twice for the same symbols.
4802 Don't make multiple loops. */
4803 if (cur == add)
4804 return;
4805 cur = cur->weakref;
4806 } while (cur != edir);
4807 }
4808 next = add->weakref;
4809 if (cur != add)
4810 {
4811 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4812 edir->weakref = add;
4813 }
4814 add = next;
4815 } while (add != NULL && add != eind);
4816 return;
4817 }
4818
4819 /* Copy over any dynamic relocs we may have on the indirect sym. */
4820 if (eind->dyn_relocs != NULL)
4821 {
4822 if (edir->dyn_relocs != NULL)
4823 {
4824 struct elf_dyn_relocs **pp;
4825 struct elf_dyn_relocs *p;
4826
4827 /* Add reloc counts against the indirect sym to the direct sym
4828 list. Merge any entries against the same section. */
4829 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4830 {
4831 struct elf_dyn_relocs *q;
4832
4833 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4834 if (q->sec == p->sec)
4835 {
4836 q->pc_count += p->pc_count;
4837 q->count += p->count;
4838 *pp = p->next;
4839 break;
4840 }
4841 if (q == NULL)
4842 pp = &p->next;
4843 }
4844 *pp = edir->dyn_relocs;
4845 }
4846
4847 edir->dyn_relocs = eind->dyn_relocs;
4848 eind->dyn_relocs = NULL;
4849 }
4850
4851 /* Copy over got entries that we may have already seen to the
4852 symbol which just became indirect. */
4853 if (eind->elf.got.glist != NULL)
4854 {
4855 if (edir->elf.got.glist != NULL)
4856 {
4857 struct got_entry **entp;
4858 struct got_entry *ent;
4859
4860 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4861 {
4862 struct got_entry *dent;
4863
4864 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4865 if (dent->addend == ent->addend
4866 && dent->owner == ent->owner
4867 && dent->tls_type == ent->tls_type)
4868 {
4869 dent->got.refcount += ent->got.refcount;
4870 *entp = ent->next;
4871 break;
4872 }
4873 if (dent == NULL)
4874 entp = &ent->next;
4875 }
4876 *entp = edir->elf.got.glist;
4877 }
4878
4879 edir->elf.got.glist = eind->elf.got.glist;
4880 eind->elf.got.glist = NULL;
4881 }
4882
4883 /* And plt entries. */
4884 move_plt_plist (eind, edir);
4885
4886 if (eind->elf.dynindx != -1)
4887 {
4888 if (edir->elf.dynindx != -1)
4889 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4890 edir->elf.dynstr_index);
4891 edir->elf.dynindx = eind->elf.dynindx;
4892 edir->elf.dynstr_index = eind->elf.dynstr_index;
4893 eind->elf.dynindx = -1;
4894 eind->elf.dynstr_index = 0;
4895 }
4896 }
4897
4898 /* Find the function descriptor hash entry from the given function code
4899 hash entry FH. Link the entries via their OH fields. */
4900
4901 static struct ppc_link_hash_entry *
4902 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4903 {
4904 struct ppc_link_hash_entry *fdh = fh->oh;
4905
4906 if (fdh == NULL)
4907 {
4908 const char *fd_name = fh->elf.root.root.string + 1;
4909
4910 fdh = (struct ppc_link_hash_entry *)
4911 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4912 if (fdh == NULL)
4913 return fdh;
4914
4915 fdh->is_func_descriptor = 1;
4916 fdh->oh = fh;
4917 fh->is_func = 1;
4918 fh->oh = fdh;
4919 }
4920
4921 fdh = ppc_follow_link (fdh);
4922 fdh->is_func_descriptor = 1;
4923 fdh->oh = fh;
4924 return fdh;
4925 }
4926
4927 /* Make a fake function descriptor sym for the undefined code sym FH. */
4928
4929 static struct ppc_link_hash_entry *
4930 make_fdh (struct bfd_link_info *info,
4931 struct ppc_link_hash_entry *fh)
4932 {
4933 bfd *abfd = fh->elf.root.u.undef.abfd;
4934 struct bfd_link_hash_entry *bh = NULL;
4935 struct ppc_link_hash_entry *fdh;
4936 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4937 ? BSF_WEAK
4938 : BSF_GLOBAL);
4939
4940 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4941 fh->elf.root.root.string + 1,
4942 flags, bfd_und_section_ptr, 0,
4943 NULL, FALSE, FALSE, &bh))
4944 return NULL;
4945
4946 fdh = (struct ppc_link_hash_entry *) bh;
4947 fdh->elf.non_elf = 0;
4948 fdh->fake = 1;
4949 fdh->is_func_descriptor = 1;
4950 fdh->oh = fh;
4951 fh->is_func = 1;
4952 fh->oh = fdh;
4953 return fdh;
4954 }
4955
4956 /* Fix function descriptor symbols defined in .opd sections to be
4957 function type. */
4958
4959 static bfd_boolean
4960 ppc64_elf_add_symbol_hook (bfd *ibfd,
4961 struct bfd_link_info *info,
4962 Elf_Internal_Sym *isym,
4963 const char **name,
4964 flagword *flags ATTRIBUTE_UNUSED,
4965 asection **sec,
4966 bfd_vma *value)
4967 {
4968 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4969 && (ibfd->flags & DYNAMIC) == 0
4970 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4971 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4972
4973 if (*sec != NULL
4974 && strcmp ((*sec)->name, ".opd") == 0)
4975 {
4976 asection *code_sec;
4977
4978 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4979 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4980 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4981
4982 /* If the symbol is a function defined in .opd, and the function
4983 code is in a discarded group, let it appear to be undefined. */
4984 if (!bfd_link_relocatable (info)
4985 && (*sec)->reloc_count != 0
4986 && opd_entry_value (*sec, *value, &code_sec, NULL,
4987 FALSE) != (bfd_vma) -1
4988 && discarded_section (code_sec))
4989 {
4990 *sec = bfd_und_section_ptr;
4991 isym->st_shndx = SHN_UNDEF;
4992 }
4993 }
4994 else if (*sec != NULL
4995 && strcmp ((*sec)->name, ".toc") == 0
4996 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4997 {
4998 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4999 if (htab != NULL)
5000 htab->params->object_in_toc = 1;
5001 }
5002
5003 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5004 {
5005 if (abiversion (ibfd) == 0)
5006 set_abiversion (ibfd, 2);
5007 else if (abiversion (ibfd) == 1)
5008 {
5009 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5010 " for ABI version 1\n"), name);
5011 bfd_set_error (bfd_error_bad_value);
5012 return FALSE;
5013 }
5014 }
5015
5016 return TRUE;
5017 }
5018
5019 /* Merge non-visibility st_other attributes: local entry point. */
5020
5021 static void
5022 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5023 const Elf_Internal_Sym *isym,
5024 bfd_boolean definition,
5025 bfd_boolean dynamic)
5026 {
5027 if (definition && (!dynamic || !h->def_regular))
5028 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5029 | ELF_ST_VISIBILITY (h->other));
5030 }
5031
5032 /* Hook called on merging a symbol. We use this to clear "fake" since
5033 we now have a real symbol. */
5034
5035 static bfd_boolean
5036 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5037 const Elf_Internal_Sym *isym,
5038 asection **psec ATTRIBUTE_UNUSED,
5039 bfd_boolean newdef ATTRIBUTE_UNUSED,
5040 bfd_boolean olddef ATTRIBUTE_UNUSED,
5041 bfd *oldbfd ATTRIBUTE_UNUSED,
5042 const asection *oldsec ATTRIBUTE_UNUSED)
5043 {
5044 ((struct ppc_link_hash_entry *) h)->fake = 0;
5045 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5046 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5047 return TRUE;
5048 }
5049
5050 /* This function makes an old ABI object reference to ".bar" cause the
5051 inclusion of a new ABI object archive that defines "bar".
5052 NAME is a symbol defined in an archive. Return a symbol in the hash
5053 table that might be satisfied by the archive symbols. */
5054
5055 static struct elf_link_hash_entry *
5056 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5057 struct bfd_link_info *info,
5058 const char *name)
5059 {
5060 struct elf_link_hash_entry *h;
5061 char *dot_name;
5062 size_t len;
5063
5064 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5065 if (h != NULL
5066 /* Don't return this sym if it is a fake function descriptor
5067 created by add_symbol_adjust. */
5068 && !((struct ppc_link_hash_entry *) h)->fake)
5069 return h;
5070
5071 if (name[0] == '.')
5072 return h;
5073
5074 len = strlen (name);
5075 dot_name = bfd_alloc (abfd, len + 2);
5076 if (dot_name == NULL)
5077 return (struct elf_link_hash_entry *) 0 - 1;
5078 dot_name[0] = '.';
5079 memcpy (dot_name + 1, name, len + 1);
5080 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5081 bfd_release (abfd, dot_name);
5082 return h;
5083 }
5084
5085 /* This function satisfies all old ABI object references to ".bar" if a
5086 new ABI object defines "bar". Well, at least, undefined dot symbols
5087 are made weak. This stops later archive searches from including an
5088 object if we already have a function descriptor definition. It also
5089 prevents the linker complaining about undefined symbols.
5090 We also check and correct mismatched symbol visibility here. The
5091 most restrictive visibility of the function descriptor and the
5092 function entry symbol is used. */
5093
5094 static bfd_boolean
5095 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5096 {
5097 struct ppc_link_hash_table *htab;
5098 struct ppc_link_hash_entry *fdh;
5099
5100 if (eh->elf.root.type == bfd_link_hash_warning)
5101 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5102
5103 if (eh->elf.root.type == bfd_link_hash_indirect)
5104 return TRUE;
5105
5106 if (eh->elf.root.root.string[0] != '.')
5107 abort ();
5108
5109 htab = ppc_hash_table (info);
5110 if (htab == NULL)
5111 return FALSE;
5112
5113 fdh = lookup_fdh (eh, htab);
5114 if (fdh == NULL
5115 && !bfd_link_relocatable (info)
5116 && (eh->elf.root.type == bfd_link_hash_undefined
5117 || eh->elf.root.type == bfd_link_hash_undefweak)
5118 && eh->elf.ref_regular)
5119 {
5120 /* Make an undefined function descriptor sym, in order to
5121 pull in an --as-needed shared lib. Archives are handled
5122 elsewhere. */
5123 fdh = make_fdh (info, eh);
5124 if (fdh == NULL)
5125 return FALSE;
5126 }
5127
5128 if (fdh != NULL)
5129 {
5130 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5131 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5132
5133 /* Make both descriptor and entry symbol have the most
5134 constraining visibility of either symbol. */
5135 if (entry_vis < descr_vis)
5136 fdh->elf.other += entry_vis - descr_vis;
5137 else if (entry_vis > descr_vis)
5138 eh->elf.other += descr_vis - entry_vis;
5139
5140 /* Propagate reference flags from entry symbol to function
5141 descriptor symbol. */
5142 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5143 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5144 fdh->elf.ref_regular |= eh->elf.ref_regular;
5145 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5146
5147 if (!fdh->elf.forced_local
5148 && fdh->elf.dynindx == -1
5149 && fdh->elf.versioned != versioned_hidden
5150 && (bfd_link_dll (info)
5151 || fdh->elf.def_dynamic
5152 || fdh->elf.ref_dynamic)
5153 && (eh->elf.ref_regular
5154 || eh->elf.def_regular))
5155 {
5156 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5157 return FALSE;
5158 }
5159 }
5160
5161 return TRUE;
5162 }
5163
5164 /* Set up opd section info and abiversion for IBFD, and process list
5165 of dot-symbols we made in link_hash_newfunc. */
5166
5167 static bfd_boolean
5168 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5169 {
5170 struct ppc_link_hash_table *htab;
5171 struct ppc_link_hash_entry **p, *eh;
5172 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5173
5174 if (opd != NULL && opd->size != 0)
5175 {
5176 if (abiversion (ibfd) == 0)
5177 set_abiversion (ibfd, 1);
5178 else if (abiversion (ibfd) >= 2)
5179 {
5180 /* xgettext:c-format */
5181 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5182 " version %d\n"),
5183 ibfd, abiversion (ibfd));
5184 bfd_set_error (bfd_error_bad_value);
5185 return FALSE;
5186 }
5187
5188 if ((ibfd->flags & DYNAMIC) == 0
5189 && (opd->flags & SEC_RELOC) != 0
5190 && opd->reloc_count != 0
5191 && !bfd_is_abs_section (opd->output_section))
5192 {
5193 /* Garbage collection needs some extra help with .opd sections.
5194 We don't want to necessarily keep everything referenced by
5195 relocs in .opd, as that would keep all functions. Instead,
5196 if we reference an .opd symbol (a function descriptor), we
5197 want to keep the function code symbol's section. This is
5198 easy for global symbols, but for local syms we need to keep
5199 information about the associated function section. */
5200 bfd_size_type amt;
5201 asection **opd_sym_map;
5202
5203 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5204 opd_sym_map = bfd_zalloc (ibfd, amt);
5205 if (opd_sym_map == NULL)
5206 return FALSE;
5207 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5208 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5209 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5210 }
5211 }
5212
5213 if (!is_ppc64_elf (info->output_bfd))
5214 return TRUE;
5215 htab = ppc_hash_table (info);
5216 if (htab == NULL)
5217 return FALSE;
5218
5219 /* For input files without an explicit abiversion in e_flags
5220 we should have flagged any with symbol st_other bits set
5221 as ELFv1 and above flagged those with .opd as ELFv2.
5222 Set the output abiversion if not yet set, and for any input
5223 still ambiguous, take its abiversion from the output.
5224 Differences in ABI are reported later. */
5225 if (abiversion (info->output_bfd) == 0)
5226 set_abiversion (info->output_bfd, abiversion (ibfd));
5227 else if (abiversion (ibfd) == 0)
5228 set_abiversion (ibfd, abiversion (info->output_bfd));
5229
5230 p = &htab->dot_syms;
5231 while ((eh = *p) != NULL)
5232 {
5233 *p = NULL;
5234 if (&eh->elf == htab->elf.hgot)
5235 ;
5236 else if (htab->elf.hgot == NULL
5237 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5238 htab->elf.hgot = &eh->elf;
5239 else if (abiversion (ibfd) <= 1)
5240 {
5241 htab->need_func_desc_adj = 1;
5242 if (!add_symbol_adjust (eh, info))
5243 return FALSE;
5244 }
5245 p = &eh->u.next_dot_sym;
5246 }
5247 return TRUE;
5248 }
5249
5250 /* Undo hash table changes when an --as-needed input file is determined
5251 not to be needed. */
5252
5253 static bfd_boolean
5254 ppc64_elf_notice_as_needed (bfd *ibfd,
5255 struct bfd_link_info *info,
5256 enum notice_asneeded_action act)
5257 {
5258 if (act == notice_not_needed)
5259 {
5260 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5261
5262 if (htab == NULL)
5263 return FALSE;
5264
5265 htab->dot_syms = NULL;
5266 }
5267 return _bfd_elf_notice_as_needed (ibfd, info, act);
5268 }
5269
5270 /* If --just-symbols against a final linked binary, then assume we need
5271 toc adjusting stubs when calling functions defined there. */
5272
5273 static void
5274 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5275 {
5276 if ((sec->flags & SEC_CODE) != 0
5277 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5278 && is_ppc64_elf (sec->owner))
5279 {
5280 if (abiversion (sec->owner) >= 2
5281 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5282 sec->has_toc_reloc = 1;
5283 }
5284 _bfd_elf_link_just_syms (sec, info);
5285 }
5286
5287 static struct plt_entry **
5288 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5289 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5290 {
5291 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5292 struct plt_entry **local_plt;
5293 unsigned char *local_got_tls_masks;
5294
5295 if (local_got_ents == NULL)
5296 {
5297 bfd_size_type size = symtab_hdr->sh_info;
5298
5299 size *= (sizeof (*local_got_ents)
5300 + sizeof (*local_plt)
5301 + sizeof (*local_got_tls_masks));
5302 local_got_ents = bfd_zalloc (abfd, size);
5303 if (local_got_ents == NULL)
5304 return NULL;
5305 elf_local_got_ents (abfd) = local_got_ents;
5306 }
5307
5308 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5309 {
5310 struct got_entry *ent;
5311
5312 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5313 if (ent->addend == r_addend
5314 && ent->owner == abfd
5315 && ent->tls_type == tls_type)
5316 break;
5317 if (ent == NULL)
5318 {
5319 bfd_size_type amt = sizeof (*ent);
5320 ent = bfd_alloc (abfd, amt);
5321 if (ent == NULL)
5322 return FALSE;
5323 ent->next = local_got_ents[r_symndx];
5324 ent->addend = r_addend;
5325 ent->owner = abfd;
5326 ent->tls_type = tls_type;
5327 ent->is_indirect = FALSE;
5328 ent->got.refcount = 0;
5329 local_got_ents[r_symndx] = ent;
5330 }
5331 ent->got.refcount += 1;
5332 }
5333
5334 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5335 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5336 local_got_tls_masks[r_symndx] |= tls_type;
5337
5338 return local_plt + r_symndx;
5339 }
5340
5341 static bfd_boolean
5342 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5343 {
5344 struct plt_entry *ent;
5345
5346 for (ent = *plist; ent != NULL; ent = ent->next)
5347 if (ent->addend == addend)
5348 break;
5349 if (ent == NULL)
5350 {
5351 bfd_size_type amt = sizeof (*ent);
5352 ent = bfd_alloc (abfd, amt);
5353 if (ent == NULL)
5354 return FALSE;
5355 ent->next = *plist;
5356 ent->addend = addend;
5357 ent->plt.refcount = 0;
5358 *plist = ent;
5359 }
5360 ent->plt.refcount += 1;
5361 return TRUE;
5362 }
5363
5364 static bfd_boolean
5365 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5366 {
5367 return (r_type == R_PPC64_REL24
5368 || r_type == R_PPC64_REL14
5369 || r_type == R_PPC64_REL14_BRTAKEN
5370 || r_type == R_PPC64_REL14_BRNTAKEN
5371 || r_type == R_PPC64_ADDR24
5372 || r_type == R_PPC64_ADDR14
5373 || r_type == R_PPC64_ADDR14_BRTAKEN
5374 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5375 }
5376
5377 /* Look through the relocs for a section during the first phase, and
5378 calculate needed space in the global offset table, procedure
5379 linkage table, and dynamic reloc sections. */
5380
5381 static bfd_boolean
5382 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5383 asection *sec, const Elf_Internal_Rela *relocs)
5384 {
5385 struct ppc_link_hash_table *htab;
5386 Elf_Internal_Shdr *symtab_hdr;
5387 struct elf_link_hash_entry **sym_hashes;
5388 const Elf_Internal_Rela *rel;
5389 const Elf_Internal_Rela *rel_end;
5390 asection *sreloc;
5391 asection **opd_sym_map;
5392 struct elf_link_hash_entry *tga, *dottga;
5393
5394 if (bfd_link_relocatable (info))
5395 return TRUE;
5396
5397 /* Don't do anything special with non-loaded, non-alloced sections.
5398 In particular, any relocs in such sections should not affect GOT
5399 and PLT reference counting (ie. we don't allow them to create GOT
5400 or PLT entries), there's no possibility or desire to optimize TLS
5401 relocs, and there's not much point in propagating relocs to shared
5402 libs that the dynamic linker won't relocate. */
5403 if ((sec->flags & SEC_ALLOC) == 0)
5404 return TRUE;
5405
5406 BFD_ASSERT (is_ppc64_elf (abfd));
5407
5408 htab = ppc_hash_table (info);
5409 if (htab == NULL)
5410 return FALSE;
5411
5412 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5413 FALSE, FALSE, TRUE);
5414 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5415 FALSE, FALSE, TRUE);
5416 symtab_hdr = &elf_symtab_hdr (abfd);
5417 sym_hashes = elf_sym_hashes (abfd);
5418 sreloc = NULL;
5419 opd_sym_map = NULL;
5420 if (ppc64_elf_section_data (sec) != NULL
5421 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5422 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5423
5424 rel_end = relocs + sec->reloc_count;
5425 for (rel = relocs; rel < rel_end; rel++)
5426 {
5427 unsigned long r_symndx;
5428 struct elf_link_hash_entry *h;
5429 enum elf_ppc64_reloc_type r_type;
5430 int tls_type;
5431 struct _ppc64_elf_section_data *ppc64_sec;
5432 struct plt_entry **ifunc, **plt_list;
5433
5434 r_symndx = ELF64_R_SYM (rel->r_info);
5435 if (r_symndx < symtab_hdr->sh_info)
5436 h = NULL;
5437 else
5438 {
5439 struct ppc_link_hash_entry *eh;
5440
5441 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5442 h = elf_follow_link (h);
5443 eh = (struct ppc_link_hash_entry *) h;
5444
5445 /* PR15323, ref flags aren't set for references in the same
5446 object. */
5447 h->root.non_ir_ref_regular = 1;
5448 if (eh->is_func && eh->oh != NULL)
5449 eh->oh->elf.root.non_ir_ref_regular = 1;
5450
5451 if (h == htab->elf.hgot)
5452 sec->has_toc_reloc = 1;
5453 }
5454
5455 tls_type = 0;
5456 ifunc = NULL;
5457 if (h != NULL)
5458 {
5459 if (h->type == STT_GNU_IFUNC)
5460 {
5461 h->needs_plt = 1;
5462 ifunc = &h->plt.plist;
5463 }
5464 }
5465 else
5466 {
5467 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5468 abfd, r_symndx);
5469 if (isym == NULL)
5470 return FALSE;
5471
5472 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5473 {
5474 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5475 rel->r_addend, PLT_IFUNC);
5476 if (ifunc == NULL)
5477 return FALSE;
5478 }
5479 }
5480
5481 r_type = ELF64_R_TYPE (rel->r_info);
5482 switch (r_type)
5483 {
5484 case R_PPC64_TLSGD:
5485 case R_PPC64_TLSLD:
5486 /* These special tls relocs tie a call to __tls_get_addr with
5487 its parameter symbol. */
5488 break;
5489
5490 case R_PPC64_GOT_TLSLD16:
5491 case R_PPC64_GOT_TLSLD16_LO:
5492 case R_PPC64_GOT_TLSLD16_HI:
5493 case R_PPC64_GOT_TLSLD16_HA:
5494 tls_type = TLS_TLS | TLS_LD;
5495 goto dogottls;
5496
5497 case R_PPC64_GOT_TLSGD16:
5498 case R_PPC64_GOT_TLSGD16_LO:
5499 case R_PPC64_GOT_TLSGD16_HI:
5500 case R_PPC64_GOT_TLSGD16_HA:
5501 tls_type = TLS_TLS | TLS_GD;
5502 goto dogottls;
5503
5504 case R_PPC64_GOT_TPREL16_DS:
5505 case R_PPC64_GOT_TPREL16_LO_DS:
5506 case R_PPC64_GOT_TPREL16_HI:
5507 case R_PPC64_GOT_TPREL16_HA:
5508 if (bfd_link_dll (info))
5509 info->flags |= DF_STATIC_TLS;
5510 tls_type = TLS_TLS | TLS_TPREL;
5511 goto dogottls;
5512
5513 case R_PPC64_GOT_DTPREL16_DS:
5514 case R_PPC64_GOT_DTPREL16_LO_DS:
5515 case R_PPC64_GOT_DTPREL16_HI:
5516 case R_PPC64_GOT_DTPREL16_HA:
5517 tls_type = TLS_TLS | TLS_DTPREL;
5518 dogottls:
5519 sec->has_tls_reloc = 1;
5520 /* Fall through */
5521
5522 case R_PPC64_GOT16:
5523 case R_PPC64_GOT16_DS:
5524 case R_PPC64_GOT16_HA:
5525 case R_PPC64_GOT16_HI:
5526 case R_PPC64_GOT16_LO:
5527 case R_PPC64_GOT16_LO_DS:
5528 /* This symbol requires a global offset table entry. */
5529 sec->has_toc_reloc = 1;
5530 if (r_type == R_PPC64_GOT_TLSLD16
5531 || r_type == R_PPC64_GOT_TLSGD16
5532 || r_type == R_PPC64_GOT_TPREL16_DS
5533 || r_type == R_PPC64_GOT_DTPREL16_DS
5534 || r_type == R_PPC64_GOT16
5535 || r_type == R_PPC64_GOT16_DS)
5536 {
5537 htab->do_multi_toc = 1;
5538 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5539 }
5540
5541 if (ppc64_elf_tdata (abfd)->got == NULL
5542 && !create_got_section (abfd, info))
5543 return FALSE;
5544
5545 if (h != NULL)
5546 {
5547 struct ppc_link_hash_entry *eh;
5548 struct got_entry *ent;
5549
5550 eh = (struct ppc_link_hash_entry *) h;
5551 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5552 if (ent->addend == rel->r_addend
5553 && ent->owner == abfd
5554 && ent->tls_type == tls_type)
5555 break;
5556 if (ent == NULL)
5557 {
5558 bfd_size_type amt = sizeof (*ent);
5559 ent = bfd_alloc (abfd, amt);
5560 if (ent == NULL)
5561 return FALSE;
5562 ent->next = eh->elf.got.glist;
5563 ent->addend = rel->r_addend;
5564 ent->owner = abfd;
5565 ent->tls_type = tls_type;
5566 ent->is_indirect = FALSE;
5567 ent->got.refcount = 0;
5568 eh->elf.got.glist = ent;
5569 }
5570 ent->got.refcount += 1;
5571 eh->tls_mask |= tls_type;
5572 }
5573 else
5574 /* This is a global offset table entry for a local symbol. */
5575 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5576 rel->r_addend, tls_type))
5577 return FALSE;
5578
5579 /* We may also need a plt entry if the symbol turns out to be
5580 an ifunc. */
5581 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5582 {
5583 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5584 return FALSE;
5585 }
5586 break;
5587
5588 case R_PPC64_PLT16_HA:
5589 case R_PPC64_PLT16_HI:
5590 case R_PPC64_PLT16_LO:
5591 case R_PPC64_PLT32:
5592 case R_PPC64_PLT64:
5593 /* This symbol requires a procedure linkage table entry. */
5594 plt_list = ifunc;
5595 if (h != NULL)
5596 {
5597 h->needs_plt = 1;
5598 if (h->root.root.string[0] == '.'
5599 && h->root.root.string[1] != '\0')
5600 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5601 plt_list = &h->plt.plist;
5602 }
5603 if (plt_list == NULL)
5604 {
5605 /* It does not make sense to have a procedure linkage
5606 table entry for a non-ifunc local symbol. */
5607 info->callbacks->einfo
5608 /* xgettext:c-format */
5609 (_("%H: %s reloc against local symbol\n"),
5610 abfd, sec, rel->r_offset,
5611 ppc64_elf_howto_table[r_type]->name);
5612 bfd_set_error (bfd_error_bad_value);
5613 return FALSE;
5614 }
5615 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5616 return FALSE;
5617 break;
5618
5619 /* The following relocations don't need to propagate the
5620 relocation if linking a shared object since they are
5621 section relative. */
5622 case R_PPC64_SECTOFF:
5623 case R_PPC64_SECTOFF_LO:
5624 case R_PPC64_SECTOFF_HI:
5625 case R_PPC64_SECTOFF_HA:
5626 case R_PPC64_SECTOFF_DS:
5627 case R_PPC64_SECTOFF_LO_DS:
5628 case R_PPC64_DTPREL16:
5629 case R_PPC64_DTPREL16_LO:
5630 case R_PPC64_DTPREL16_HI:
5631 case R_PPC64_DTPREL16_HA:
5632 case R_PPC64_DTPREL16_DS:
5633 case R_PPC64_DTPREL16_LO_DS:
5634 case R_PPC64_DTPREL16_HIGH:
5635 case R_PPC64_DTPREL16_HIGHA:
5636 case R_PPC64_DTPREL16_HIGHER:
5637 case R_PPC64_DTPREL16_HIGHERA:
5638 case R_PPC64_DTPREL16_HIGHEST:
5639 case R_PPC64_DTPREL16_HIGHESTA:
5640 break;
5641
5642 /* Nor do these. */
5643 case R_PPC64_REL16:
5644 case R_PPC64_REL16_LO:
5645 case R_PPC64_REL16_HI:
5646 case R_PPC64_REL16_HA:
5647 case R_PPC64_REL16DX_HA:
5648 break;
5649
5650 /* Not supported as a dynamic relocation. */
5651 case R_PPC64_ADDR64_LOCAL:
5652 if (bfd_link_pic (info))
5653 {
5654 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5655 ppc_howto_init ();
5656 /* xgettext:c-format */
5657 info->callbacks->einfo (_("%H: %s reloc unsupported "
5658 "in shared libraries and PIEs.\n"),
5659 abfd, sec, rel->r_offset,
5660 ppc64_elf_howto_table[r_type]->name);
5661 bfd_set_error (bfd_error_bad_value);
5662 return FALSE;
5663 }
5664 break;
5665
5666 case R_PPC64_TOC16:
5667 case R_PPC64_TOC16_DS:
5668 htab->do_multi_toc = 1;
5669 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5670 /* Fall through. */
5671 case R_PPC64_TOC16_LO:
5672 case R_PPC64_TOC16_HI:
5673 case R_PPC64_TOC16_HA:
5674 case R_PPC64_TOC16_LO_DS:
5675 sec->has_toc_reloc = 1;
5676 break;
5677
5678 /* Marker reloc. */
5679 case R_PPC64_ENTRY:
5680 break;
5681
5682 /* This relocation describes the C++ object vtable hierarchy.
5683 Reconstruct it for later use during GC. */
5684 case R_PPC64_GNU_VTINHERIT:
5685 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5686 return FALSE;
5687 break;
5688
5689 /* This relocation describes which C++ vtable entries are actually
5690 used. Record for later use during GC. */
5691 case R_PPC64_GNU_VTENTRY:
5692 BFD_ASSERT (h != NULL);
5693 if (h != NULL
5694 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5695 return FALSE;
5696 break;
5697
5698 case R_PPC64_REL14:
5699 case R_PPC64_REL14_BRTAKEN:
5700 case R_PPC64_REL14_BRNTAKEN:
5701 {
5702 asection *dest = NULL;
5703
5704 /* Heuristic: If jumping outside our section, chances are
5705 we are going to need a stub. */
5706 if (h != NULL)
5707 {
5708 /* If the sym is weak it may be overridden later, so
5709 don't assume we know where a weak sym lives. */
5710 if (h->root.type == bfd_link_hash_defined)
5711 dest = h->root.u.def.section;
5712 }
5713 else
5714 {
5715 Elf_Internal_Sym *isym;
5716
5717 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5718 abfd, r_symndx);
5719 if (isym == NULL)
5720 return FALSE;
5721
5722 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5723 }
5724
5725 if (dest != sec)
5726 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5727 }
5728 /* Fall through. */
5729
5730 case R_PPC64_REL24:
5731 plt_list = ifunc;
5732 if (h != NULL)
5733 {
5734 h->needs_plt = 1;
5735 if (h->root.root.string[0] == '.'
5736 && h->root.root.string[1] != '\0')
5737 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5738
5739 if (h == tga || h == dottga)
5740 {
5741 sec->has_tls_reloc = 1;
5742 if (rel != relocs
5743 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5744 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5745 /* We have a new-style __tls_get_addr call with
5746 a marker reloc. */
5747 ;
5748 else
5749 /* Mark this section as having an old-style call. */
5750 sec->has_tls_get_addr_call = 1;
5751 }
5752 plt_list = &h->plt.plist;
5753 }
5754
5755 /* We may need a .plt entry if the function this reloc
5756 refers to is in a shared lib. */
5757 if (plt_list
5758 && !update_plt_info (abfd, plt_list, rel->r_addend))
5759 return FALSE;
5760 break;
5761
5762 case R_PPC64_ADDR14:
5763 case R_PPC64_ADDR14_BRNTAKEN:
5764 case R_PPC64_ADDR14_BRTAKEN:
5765 case R_PPC64_ADDR24:
5766 goto dodyn;
5767
5768 case R_PPC64_TPREL64:
5769 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5770 if (bfd_link_dll (info))
5771 info->flags |= DF_STATIC_TLS;
5772 goto dotlstoc;
5773
5774 case R_PPC64_DTPMOD64:
5775 if (rel + 1 < rel_end
5776 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5777 && rel[1].r_offset == rel->r_offset + 8)
5778 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5779 else
5780 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5781 goto dotlstoc;
5782
5783 case R_PPC64_DTPREL64:
5784 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5785 if (rel != relocs
5786 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5787 && rel[-1].r_offset == rel->r_offset - 8)
5788 /* This is the second reloc of a dtpmod, dtprel pair.
5789 Don't mark with TLS_DTPREL. */
5790 goto dodyn;
5791
5792 dotlstoc:
5793 sec->has_tls_reloc = 1;
5794 if (h != NULL)
5795 {
5796 struct ppc_link_hash_entry *eh;
5797 eh = (struct ppc_link_hash_entry *) h;
5798 eh->tls_mask |= tls_type;
5799 }
5800 else
5801 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5802 rel->r_addend, tls_type))
5803 return FALSE;
5804
5805 ppc64_sec = ppc64_elf_section_data (sec);
5806 if (ppc64_sec->sec_type != sec_toc)
5807 {
5808 bfd_size_type amt;
5809
5810 /* One extra to simplify get_tls_mask. */
5811 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5812 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5813 if (ppc64_sec->u.toc.symndx == NULL)
5814 return FALSE;
5815 amt = sec->size * sizeof (bfd_vma) / 8;
5816 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5817 if (ppc64_sec->u.toc.add == NULL)
5818 return FALSE;
5819 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5820 ppc64_sec->sec_type = sec_toc;
5821 }
5822 BFD_ASSERT (rel->r_offset % 8 == 0);
5823 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5824 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5825
5826 /* Mark the second slot of a GD or LD entry.
5827 -1 to indicate GD and -2 to indicate LD. */
5828 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5829 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5830 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5831 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5832 goto dodyn;
5833
5834 case R_PPC64_TPREL16:
5835 case R_PPC64_TPREL16_LO:
5836 case R_PPC64_TPREL16_HI:
5837 case R_PPC64_TPREL16_HA:
5838 case R_PPC64_TPREL16_DS:
5839 case R_PPC64_TPREL16_LO_DS:
5840 case R_PPC64_TPREL16_HIGH:
5841 case R_PPC64_TPREL16_HIGHA:
5842 case R_PPC64_TPREL16_HIGHER:
5843 case R_PPC64_TPREL16_HIGHERA:
5844 case R_PPC64_TPREL16_HIGHEST:
5845 case R_PPC64_TPREL16_HIGHESTA:
5846 if (bfd_link_dll (info))
5847 info->flags |= DF_STATIC_TLS;
5848 goto dodyn;
5849
5850 case R_PPC64_ADDR64:
5851 if (opd_sym_map != NULL
5852 && rel + 1 < rel_end
5853 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5854 {
5855 if (h != NULL)
5856 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5857 else
5858 {
5859 asection *s;
5860 Elf_Internal_Sym *isym;
5861
5862 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5863 abfd, r_symndx);
5864 if (isym == NULL)
5865 return FALSE;
5866
5867 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5868 if (s != NULL && s != sec)
5869 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5870 }
5871 }
5872 /* Fall through. */
5873
5874 case R_PPC64_ADDR16:
5875 case R_PPC64_ADDR16_DS:
5876 case R_PPC64_ADDR16_HA:
5877 case R_PPC64_ADDR16_HI:
5878 case R_PPC64_ADDR16_HIGH:
5879 case R_PPC64_ADDR16_HIGHA:
5880 case R_PPC64_ADDR16_HIGHER:
5881 case R_PPC64_ADDR16_HIGHERA:
5882 case R_PPC64_ADDR16_HIGHEST:
5883 case R_PPC64_ADDR16_HIGHESTA:
5884 case R_PPC64_ADDR16_LO:
5885 case R_PPC64_ADDR16_LO_DS:
5886 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5887 && rel->r_addend == 0)
5888 {
5889 /* We may need a .plt entry if this reloc refers to a
5890 function in a shared lib. */
5891 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5892 return FALSE;
5893 h->pointer_equality_needed = 1;
5894 }
5895 /* Fall through. */
5896
5897 case R_PPC64_REL30:
5898 case R_PPC64_REL32:
5899 case R_PPC64_REL64:
5900 case R_PPC64_ADDR32:
5901 case R_PPC64_UADDR16:
5902 case R_PPC64_UADDR32:
5903 case R_PPC64_UADDR64:
5904 case R_PPC64_TOC:
5905 if (h != NULL && !bfd_link_pic (info))
5906 /* We may need a copy reloc. */
5907 h->non_got_ref = 1;
5908
5909 /* Don't propagate .opd relocs. */
5910 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5911 break;
5912
5913 /* If we are creating a shared library, and this is a reloc
5914 against a global symbol, or a non PC relative reloc
5915 against a local symbol, then we need to copy the reloc
5916 into the shared library. However, if we are linking with
5917 -Bsymbolic, we do not need to copy a reloc against a
5918 global symbol which is defined in an object we are
5919 including in the link (i.e., DEF_REGULAR is set). At
5920 this point we have not seen all the input files, so it is
5921 possible that DEF_REGULAR is not set now but will be set
5922 later (it is never cleared). In case of a weak definition,
5923 DEF_REGULAR may be cleared later by a strong definition in
5924 a shared library. We account for that possibility below by
5925 storing information in the dyn_relocs field of the hash
5926 table entry. A similar situation occurs when creating
5927 shared libraries and symbol visibility changes render the
5928 symbol local.
5929
5930 If on the other hand, we are creating an executable, we
5931 may need to keep relocations for symbols satisfied by a
5932 dynamic library if we manage to avoid copy relocs for the
5933 symbol. */
5934 dodyn:
5935 if ((bfd_link_pic (info)
5936 && (must_be_dyn_reloc (info, r_type)
5937 || (h != NULL
5938 && (!SYMBOLIC_BIND (info, h)
5939 || h->root.type == bfd_link_hash_defweak
5940 || !h->def_regular))))
5941 || (ELIMINATE_COPY_RELOCS
5942 && !bfd_link_pic (info)
5943 && h != NULL
5944 && (h->root.type == bfd_link_hash_defweak
5945 || !h->def_regular))
5946 || (!bfd_link_pic (info)
5947 && ifunc != NULL))
5948 {
5949 /* We must copy these reloc types into the output file.
5950 Create a reloc section in dynobj and make room for
5951 this reloc. */
5952 if (sreloc == NULL)
5953 {
5954 sreloc = _bfd_elf_make_dynamic_reloc_section
5955 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5956
5957 if (sreloc == NULL)
5958 return FALSE;
5959 }
5960
5961 /* If this is a global symbol, we count the number of
5962 relocations we need for this symbol. */
5963 if (h != NULL)
5964 {
5965 struct elf_dyn_relocs *p;
5966 struct elf_dyn_relocs **head;
5967
5968 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5969 p = *head;
5970 if (p == NULL || p->sec != sec)
5971 {
5972 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5973 if (p == NULL)
5974 return FALSE;
5975 p->next = *head;
5976 *head = p;
5977 p->sec = sec;
5978 p->count = 0;
5979 p->pc_count = 0;
5980 }
5981 p->count += 1;
5982 if (!must_be_dyn_reloc (info, r_type))
5983 p->pc_count += 1;
5984 }
5985 else
5986 {
5987 /* Track dynamic relocs needed for local syms too.
5988 We really need local syms available to do this
5989 easily. Oh well. */
5990 struct ppc_dyn_relocs *p;
5991 struct ppc_dyn_relocs **head;
5992 bfd_boolean is_ifunc;
5993 asection *s;
5994 void *vpp;
5995 Elf_Internal_Sym *isym;
5996
5997 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5998 abfd, r_symndx);
5999 if (isym == NULL)
6000 return FALSE;
6001
6002 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6003 if (s == NULL)
6004 s = sec;
6005
6006 vpp = &elf_section_data (s)->local_dynrel;
6007 head = (struct ppc_dyn_relocs **) vpp;
6008 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6009 p = *head;
6010 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6011 p = p->next;
6012 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6013 {
6014 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6015 if (p == NULL)
6016 return FALSE;
6017 p->next = *head;
6018 *head = p;
6019 p->sec = sec;
6020 p->ifunc = is_ifunc;
6021 p->count = 0;
6022 }
6023 p->count += 1;
6024 }
6025 }
6026 break;
6027
6028 default:
6029 break;
6030 }
6031 }
6032
6033 return TRUE;
6034 }
6035
6036 /* Merge backend specific data from an object file to the output
6037 object file when linking. */
6038
6039 static bfd_boolean
6040 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6041 {
6042 bfd *obfd = info->output_bfd;
6043 unsigned long iflags, oflags;
6044
6045 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6046 return TRUE;
6047
6048 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6049 return TRUE;
6050
6051 if (!_bfd_generic_verify_endian_match (ibfd, info))
6052 return FALSE;
6053
6054 iflags = elf_elfheader (ibfd)->e_flags;
6055 oflags = elf_elfheader (obfd)->e_flags;
6056
6057 if (iflags & ~EF_PPC64_ABI)
6058 {
6059 _bfd_error_handler
6060 /* xgettext:c-format */
6061 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6062 bfd_set_error (bfd_error_bad_value);
6063 return FALSE;
6064 }
6065 else if (iflags != oflags && iflags != 0)
6066 {
6067 _bfd_error_handler
6068 /* xgettext:c-format */
6069 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6070 ibfd, iflags, oflags);
6071 bfd_set_error (bfd_error_bad_value);
6072 return FALSE;
6073 }
6074
6075 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6076
6077 /* Merge Tag_compatibility attributes and any common GNU ones. */
6078 _bfd_elf_merge_object_attributes (ibfd, info);
6079
6080 return TRUE;
6081 }
6082
6083 static bfd_boolean
6084 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6085 {
6086 /* Print normal ELF private data. */
6087 _bfd_elf_print_private_bfd_data (abfd, ptr);
6088
6089 if (elf_elfheader (abfd)->e_flags != 0)
6090 {
6091 FILE *file = ptr;
6092
6093 fprintf (file, _("private flags = 0x%lx:"),
6094 elf_elfheader (abfd)->e_flags);
6095
6096 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6097 fprintf (file, _(" [abiv%ld]"),
6098 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6099 fputc ('\n', file);
6100 }
6101
6102 return TRUE;
6103 }
6104
6105 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6106 of the code entry point, and its section, which must be in the same
6107 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6108
6109 static bfd_vma
6110 opd_entry_value (asection *opd_sec,
6111 bfd_vma offset,
6112 asection **code_sec,
6113 bfd_vma *code_off,
6114 bfd_boolean in_code_sec)
6115 {
6116 bfd *opd_bfd = opd_sec->owner;
6117 Elf_Internal_Rela *relocs;
6118 Elf_Internal_Rela *lo, *hi, *look;
6119 bfd_vma val;
6120
6121 /* No relocs implies we are linking a --just-symbols object, or looking
6122 at a final linked executable with addr2line or somesuch. */
6123 if (opd_sec->reloc_count == 0)
6124 {
6125 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6126
6127 if (contents == NULL)
6128 {
6129 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6130 return (bfd_vma) -1;
6131 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6132 }
6133
6134 /* PR 17512: file: 64b9dfbb. */
6135 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6136 return (bfd_vma) -1;
6137
6138 val = bfd_get_64 (opd_bfd, contents + offset);
6139 if (code_sec != NULL)
6140 {
6141 asection *sec, *likely = NULL;
6142
6143 if (in_code_sec)
6144 {
6145 sec = *code_sec;
6146 if (sec->vma <= val
6147 && val < sec->vma + sec->size)
6148 likely = sec;
6149 else
6150 val = -1;
6151 }
6152 else
6153 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6154 if (sec->vma <= val
6155 && (sec->flags & SEC_LOAD) != 0
6156 && (sec->flags & SEC_ALLOC) != 0)
6157 likely = sec;
6158 if (likely != NULL)
6159 {
6160 *code_sec = likely;
6161 if (code_off != NULL)
6162 *code_off = val - likely->vma;
6163 }
6164 }
6165 return val;
6166 }
6167
6168 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6169
6170 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6171 if (relocs == NULL)
6172 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6173 /* PR 17512: file: df8e1fd6. */
6174 if (relocs == NULL)
6175 return (bfd_vma) -1;
6176
6177 /* Go find the opd reloc at the sym address. */
6178 lo = relocs;
6179 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6180 val = (bfd_vma) -1;
6181 while (lo < hi)
6182 {
6183 look = lo + (hi - lo) / 2;
6184 if (look->r_offset < offset)
6185 lo = look + 1;
6186 else if (look->r_offset > offset)
6187 hi = look;
6188 else
6189 {
6190 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6191
6192 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6193 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6194 {
6195 unsigned long symndx = ELF64_R_SYM (look->r_info);
6196 asection *sec = NULL;
6197
6198 if (symndx >= symtab_hdr->sh_info
6199 && elf_sym_hashes (opd_bfd) != NULL)
6200 {
6201 struct elf_link_hash_entry **sym_hashes;
6202 struct elf_link_hash_entry *rh;
6203
6204 sym_hashes = elf_sym_hashes (opd_bfd);
6205 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6206 if (rh != NULL)
6207 {
6208 rh = elf_follow_link (rh);
6209 if (rh->root.type != bfd_link_hash_defined
6210 && rh->root.type != bfd_link_hash_defweak)
6211 break;
6212 if (rh->root.u.def.section->owner == opd_bfd)
6213 {
6214 val = rh->root.u.def.value;
6215 sec = rh->root.u.def.section;
6216 }
6217 }
6218 }
6219
6220 if (sec == NULL)
6221 {
6222 Elf_Internal_Sym *sym;
6223
6224 if (symndx < symtab_hdr->sh_info)
6225 {
6226 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6227 if (sym == NULL)
6228 {
6229 size_t symcnt = symtab_hdr->sh_info;
6230 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6231 symcnt, 0,
6232 NULL, NULL, NULL);
6233 if (sym == NULL)
6234 break;
6235 symtab_hdr->contents = (bfd_byte *) sym;
6236 }
6237 sym += symndx;
6238 }
6239 else
6240 {
6241 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6242 1, symndx,
6243 NULL, NULL, NULL);
6244 if (sym == NULL)
6245 break;
6246 }
6247 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6248 if (sec == NULL)
6249 break;
6250 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6251 val = sym->st_value;
6252 }
6253
6254 val += look->r_addend;
6255 if (code_off != NULL)
6256 *code_off = val;
6257 if (code_sec != NULL)
6258 {
6259 if (in_code_sec && *code_sec != sec)
6260 return -1;
6261 else
6262 *code_sec = sec;
6263 }
6264 if (sec->output_section != NULL)
6265 val += sec->output_section->vma + sec->output_offset;
6266 }
6267 break;
6268 }
6269 }
6270
6271 return val;
6272 }
6273
6274 /* If the ELF symbol SYM might be a function in SEC, return the
6275 function size and set *CODE_OFF to the function's entry point,
6276 otherwise return zero. */
6277
6278 static bfd_size_type
6279 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6280 bfd_vma *code_off)
6281 {
6282 bfd_size_type size;
6283
6284 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6285 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6286 return 0;
6287
6288 size = 0;
6289 if (!(sym->flags & BSF_SYNTHETIC))
6290 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6291
6292 if (strcmp (sym->section->name, ".opd") == 0)
6293 {
6294 struct _opd_sec_data *opd = get_opd_info (sym->section);
6295 bfd_vma symval = sym->value;
6296
6297 if (opd != NULL
6298 && opd->adjust != NULL
6299 && elf_section_data (sym->section)->relocs != NULL)
6300 {
6301 /* opd_entry_value will use cached relocs that have been
6302 adjusted, but with raw symbols. That means both local
6303 and global symbols need adjusting. */
6304 long adjust = opd->adjust[OPD_NDX (symval)];
6305 if (adjust == -1)
6306 return 0;
6307 symval += adjust;
6308 }
6309
6310 if (opd_entry_value (sym->section, symval,
6311 &sec, code_off, TRUE) == (bfd_vma) -1)
6312 return 0;
6313 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6314 symbol. This size has nothing to do with the code size of the
6315 function, which is what we're supposed to return, but the
6316 code size isn't available without looking up the dot-sym.
6317 However, doing that would be a waste of time particularly
6318 since elf_find_function will look at the dot-sym anyway.
6319 Now, elf_find_function will keep the largest size of any
6320 function sym found at the code address of interest, so return
6321 1 here to avoid it incorrectly caching a larger function size
6322 for a small function. This does mean we return the wrong
6323 size for a new-ABI function of size 24, but all that does is
6324 disable caching for such functions. */
6325 if (size == 24)
6326 size = 1;
6327 }
6328 else
6329 {
6330 if (sym->section != sec)
6331 return 0;
6332 *code_off = sym->value;
6333 }
6334 if (size == 0)
6335 size = 1;
6336 return size;
6337 }
6338
6339 /* Return true if symbol is a strong function defined in an ELFv2
6340 object with st_other localentry bits of zero, ie. its local entry
6341 point coincides with its global entry point. */
6342
6343 static bfd_boolean
6344 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6345 {
6346 return (h != NULL
6347 && h->type == STT_FUNC
6348 && h->root.type == bfd_link_hash_defined
6349 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6350 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6351 && is_ppc64_elf (h->root.u.def.section->owner)
6352 && abiversion (h->root.u.def.section->owner) >= 2);
6353 }
6354
6355 /* Return true if symbol is defined in a regular object file. */
6356
6357 static bfd_boolean
6358 is_static_defined (struct elf_link_hash_entry *h)
6359 {
6360 return ((h->root.type == bfd_link_hash_defined
6361 || h->root.type == bfd_link_hash_defweak)
6362 && h->root.u.def.section != NULL
6363 && h->root.u.def.section->output_section != NULL);
6364 }
6365
6366 /* If FDH is a function descriptor symbol, return the associated code
6367 entry symbol if it is defined. Return NULL otherwise. */
6368
6369 static struct ppc_link_hash_entry *
6370 defined_code_entry (struct ppc_link_hash_entry *fdh)
6371 {
6372 if (fdh->is_func_descriptor)
6373 {
6374 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6375 if (fh->elf.root.type == bfd_link_hash_defined
6376 || fh->elf.root.type == bfd_link_hash_defweak)
6377 return fh;
6378 }
6379 return NULL;
6380 }
6381
6382 /* If FH is a function code entry symbol, return the associated
6383 function descriptor symbol if it is defined. Return NULL otherwise. */
6384
6385 static struct ppc_link_hash_entry *
6386 defined_func_desc (struct ppc_link_hash_entry *fh)
6387 {
6388 if (fh->oh != NULL
6389 && fh->oh->is_func_descriptor)
6390 {
6391 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6392 if (fdh->elf.root.type == bfd_link_hash_defined
6393 || fdh->elf.root.type == bfd_link_hash_defweak)
6394 return fdh;
6395 }
6396 return NULL;
6397 }
6398
6399 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6400
6401 /* Garbage collect sections, after first dealing with dot-symbols. */
6402
6403 static bfd_boolean
6404 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6405 {
6406 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6407
6408 if (htab != NULL && htab->need_func_desc_adj)
6409 {
6410 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6411 htab->need_func_desc_adj = 0;
6412 }
6413 return bfd_elf_gc_sections (abfd, info);
6414 }
6415
6416 /* Mark all our entry sym sections, both opd and code section. */
6417
6418 static void
6419 ppc64_elf_gc_keep (struct bfd_link_info *info)
6420 {
6421 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6422 struct bfd_sym_chain *sym;
6423
6424 if (htab == NULL)
6425 return;
6426
6427 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6428 {
6429 struct ppc_link_hash_entry *eh, *fh;
6430 asection *sec;
6431
6432 eh = (struct ppc_link_hash_entry *)
6433 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6434 if (eh == NULL)
6435 continue;
6436 if (eh->elf.root.type != bfd_link_hash_defined
6437 && eh->elf.root.type != bfd_link_hash_defweak)
6438 continue;
6439
6440 fh = defined_code_entry (eh);
6441 if (fh != NULL)
6442 {
6443 sec = fh->elf.root.u.def.section;
6444 sec->flags |= SEC_KEEP;
6445 }
6446 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6447 && opd_entry_value (eh->elf.root.u.def.section,
6448 eh->elf.root.u.def.value,
6449 &sec, NULL, FALSE) != (bfd_vma) -1)
6450 sec->flags |= SEC_KEEP;
6451
6452 sec = eh->elf.root.u.def.section;
6453 sec->flags |= SEC_KEEP;
6454 }
6455 }
6456
6457 /* Mark sections containing dynamically referenced symbols. When
6458 building shared libraries, we must assume that any visible symbol is
6459 referenced. */
6460
6461 static bfd_boolean
6462 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6463 {
6464 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6465 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6466 struct ppc_link_hash_entry *fdh;
6467 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6468
6469 /* Dynamic linking info is on the func descriptor sym. */
6470 fdh = defined_func_desc (eh);
6471 if (fdh != NULL)
6472 eh = fdh;
6473
6474 if ((eh->elf.root.type == bfd_link_hash_defined
6475 || eh->elf.root.type == bfd_link_hash_defweak)
6476 && (eh->elf.ref_dynamic
6477 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6478 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6479 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6480 && (!bfd_link_executable (info)
6481 || info->gc_keep_exported
6482 || info->export_dynamic
6483 || (eh->elf.dynamic
6484 && d != NULL
6485 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6486 && (eh->elf.versioned >= versioned
6487 || !bfd_hide_sym_by_version (info->version_info,
6488 eh->elf.root.root.string)))))
6489 {
6490 asection *code_sec;
6491 struct ppc_link_hash_entry *fh;
6492
6493 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6494
6495 /* Function descriptor syms cause the associated
6496 function code sym section to be marked. */
6497 fh = defined_code_entry (eh);
6498 if (fh != NULL)
6499 {
6500 code_sec = fh->elf.root.u.def.section;
6501 code_sec->flags |= SEC_KEEP;
6502 }
6503 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6504 && opd_entry_value (eh->elf.root.u.def.section,
6505 eh->elf.root.u.def.value,
6506 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6507 code_sec->flags |= SEC_KEEP;
6508 }
6509
6510 return TRUE;
6511 }
6512
6513 /* Return the section that should be marked against GC for a given
6514 relocation. */
6515
6516 static asection *
6517 ppc64_elf_gc_mark_hook (asection *sec,
6518 struct bfd_link_info *info,
6519 Elf_Internal_Rela *rel,
6520 struct elf_link_hash_entry *h,
6521 Elf_Internal_Sym *sym)
6522 {
6523 asection *rsec;
6524
6525 /* Syms return NULL if we're marking .opd, so we avoid marking all
6526 function sections, as all functions are referenced in .opd. */
6527 rsec = NULL;
6528 if (get_opd_info (sec) != NULL)
6529 return rsec;
6530
6531 if (h != NULL)
6532 {
6533 enum elf_ppc64_reloc_type r_type;
6534 struct ppc_link_hash_entry *eh, *fh, *fdh;
6535
6536 r_type = ELF64_R_TYPE (rel->r_info);
6537 switch (r_type)
6538 {
6539 case R_PPC64_GNU_VTINHERIT:
6540 case R_PPC64_GNU_VTENTRY:
6541 break;
6542
6543 default:
6544 switch (h->root.type)
6545 {
6546 case bfd_link_hash_defined:
6547 case bfd_link_hash_defweak:
6548 eh = (struct ppc_link_hash_entry *) h;
6549 fdh = defined_func_desc (eh);
6550 if (fdh != NULL)
6551 {
6552 /* -mcall-aixdesc code references the dot-symbol on
6553 a call reloc. Mark the function descriptor too
6554 against garbage collection. */
6555 fdh->elf.mark = 1;
6556 if (fdh->elf.u.weakdef != NULL)
6557 fdh->elf.u.weakdef->mark = 1;
6558 eh = fdh;
6559 }
6560
6561 /* Function descriptor syms cause the associated
6562 function code sym section to be marked. */
6563 fh = defined_code_entry (eh);
6564 if (fh != NULL)
6565 {
6566 /* They also mark their opd section. */
6567 eh->elf.root.u.def.section->gc_mark = 1;
6568
6569 rsec = fh->elf.root.u.def.section;
6570 }
6571 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6572 && opd_entry_value (eh->elf.root.u.def.section,
6573 eh->elf.root.u.def.value,
6574 &rsec, NULL, FALSE) != (bfd_vma) -1)
6575 eh->elf.root.u.def.section->gc_mark = 1;
6576 else
6577 rsec = h->root.u.def.section;
6578 break;
6579
6580 case bfd_link_hash_common:
6581 rsec = h->root.u.c.p->section;
6582 break;
6583
6584 default:
6585 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6586 }
6587 }
6588 }
6589 else
6590 {
6591 struct _opd_sec_data *opd;
6592
6593 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6594 opd = get_opd_info (rsec);
6595 if (opd != NULL && opd->func_sec != NULL)
6596 {
6597 rsec->gc_mark = 1;
6598
6599 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6600 }
6601 }
6602
6603 return rsec;
6604 }
6605
6606 /* Update the .got, .plt. and dynamic reloc reference counts for the
6607 section being removed. */
6608
6609 static bfd_boolean
6610 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6611 asection *sec, const Elf_Internal_Rela *relocs)
6612 {
6613 struct ppc_link_hash_table *htab;
6614 Elf_Internal_Shdr *symtab_hdr;
6615 struct elf_link_hash_entry **sym_hashes;
6616 struct got_entry **local_got_ents;
6617 const Elf_Internal_Rela *rel, *relend;
6618
6619 if (bfd_link_relocatable (info))
6620 return TRUE;
6621
6622 if ((sec->flags & SEC_ALLOC) == 0)
6623 return TRUE;
6624
6625 elf_section_data (sec)->local_dynrel = NULL;
6626
6627 htab = ppc_hash_table (info);
6628 if (htab == NULL)
6629 return FALSE;
6630
6631 symtab_hdr = &elf_symtab_hdr (abfd);
6632 sym_hashes = elf_sym_hashes (abfd);
6633 local_got_ents = elf_local_got_ents (abfd);
6634
6635 relend = relocs + sec->reloc_count;
6636 for (rel = relocs; rel < relend; rel++)
6637 {
6638 unsigned long r_symndx;
6639 enum elf_ppc64_reloc_type r_type;
6640 struct elf_link_hash_entry *h = NULL;
6641 struct plt_entry **plt_list = NULL;
6642 unsigned char tls_type = 0;
6643
6644 r_symndx = ELF64_R_SYM (rel->r_info);
6645 r_type = ELF64_R_TYPE (rel->r_info);
6646 if (r_symndx >= symtab_hdr->sh_info)
6647 {
6648 struct ppc_link_hash_entry *eh;
6649 struct elf_dyn_relocs **pp;
6650 struct elf_dyn_relocs *p;
6651
6652 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6653 h = elf_follow_link (h);
6654 eh = (struct ppc_link_hash_entry *) h;
6655
6656 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6657 if (p->sec == sec)
6658 {
6659 /* Everything must go for SEC. */
6660 *pp = p->next;
6661 break;
6662 }
6663 }
6664
6665 switch (r_type)
6666 {
6667 case R_PPC64_GOT_TLSLD16:
6668 case R_PPC64_GOT_TLSLD16_LO:
6669 case R_PPC64_GOT_TLSLD16_HI:
6670 case R_PPC64_GOT_TLSLD16_HA:
6671 tls_type = TLS_TLS | TLS_LD;
6672 goto dogot;
6673
6674 case R_PPC64_GOT_TLSGD16:
6675 case R_PPC64_GOT_TLSGD16_LO:
6676 case R_PPC64_GOT_TLSGD16_HI:
6677 case R_PPC64_GOT_TLSGD16_HA:
6678 tls_type = TLS_TLS | TLS_GD;
6679 goto dogot;
6680
6681 case R_PPC64_GOT_TPREL16_DS:
6682 case R_PPC64_GOT_TPREL16_LO_DS:
6683 case R_PPC64_GOT_TPREL16_HI:
6684 case R_PPC64_GOT_TPREL16_HA:
6685 tls_type = TLS_TLS | TLS_TPREL;
6686 goto dogot;
6687
6688 case R_PPC64_GOT_DTPREL16_DS:
6689 case R_PPC64_GOT_DTPREL16_LO_DS:
6690 case R_PPC64_GOT_DTPREL16_HI:
6691 case R_PPC64_GOT_DTPREL16_HA:
6692 tls_type = TLS_TLS | TLS_DTPREL;
6693 goto dogot;
6694
6695 case R_PPC64_GOT16:
6696 case R_PPC64_GOT16_DS:
6697 case R_PPC64_GOT16_HA:
6698 case R_PPC64_GOT16_HI:
6699 case R_PPC64_GOT16_LO:
6700 case R_PPC64_GOT16_LO_DS:
6701 dogot:
6702 {
6703 struct got_entry *ent;
6704
6705 if (h != NULL)
6706 ent = h->got.glist;
6707 else
6708 ent = local_got_ents[r_symndx];
6709
6710 for (; ent != NULL; ent = ent->next)
6711 if (ent->addend == rel->r_addend
6712 && ent->owner == abfd
6713 && ent->tls_type == tls_type)
6714 break;
6715 if (ent == NULL)
6716 abort ();
6717 if (ent->got.refcount > 0)
6718 ent->got.refcount -= 1;
6719 }
6720 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6721 plt_list = &h->plt.plist;
6722 break;
6723
6724 case R_PPC64_PLT16_HA:
6725 case R_PPC64_PLT16_HI:
6726 case R_PPC64_PLT16_LO:
6727 case R_PPC64_PLT32:
6728 case R_PPC64_PLT64:
6729 case R_PPC64_REL14:
6730 case R_PPC64_REL14_BRNTAKEN:
6731 case R_PPC64_REL14_BRTAKEN:
6732 case R_PPC64_REL24:
6733 if (h != NULL)
6734 plt_list = &h->plt.plist;
6735 else if (local_got_ents != NULL)
6736 {
6737 struct plt_entry **local_plt = (struct plt_entry **)
6738 (local_got_ents + symtab_hdr->sh_info);
6739 unsigned char *local_got_tls_masks = (unsigned char *)
6740 (local_plt + symtab_hdr->sh_info);
6741 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6742 plt_list = local_plt + r_symndx;
6743 }
6744 break;
6745
6746 case R_PPC64_ADDR64:
6747 case R_PPC64_ADDR16:
6748 case R_PPC64_ADDR16_DS:
6749 case R_PPC64_ADDR16_HA:
6750 case R_PPC64_ADDR16_HI:
6751 case R_PPC64_ADDR16_HIGH:
6752 case R_PPC64_ADDR16_HIGHA:
6753 case R_PPC64_ADDR16_HIGHER:
6754 case R_PPC64_ADDR16_HIGHERA:
6755 case R_PPC64_ADDR16_HIGHEST:
6756 case R_PPC64_ADDR16_HIGHESTA:
6757 case R_PPC64_ADDR16_LO:
6758 case R_PPC64_ADDR16_LO_DS:
6759 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6760 && rel->r_addend == 0)
6761 plt_list = &h->plt.plist;
6762 break;
6763
6764 default:
6765 break;
6766 }
6767 if (plt_list != NULL)
6768 {
6769 struct plt_entry *ent;
6770
6771 for (ent = *plt_list; ent != NULL; ent = ent->next)
6772 if (ent->addend == rel->r_addend)
6773 break;
6774 if (ent != NULL && ent->plt.refcount > 0)
6775 ent->plt.refcount -= 1;
6776 }
6777 }
6778 return TRUE;
6779 }
6780
6781 /* The maximum size of .sfpr. */
6782 #define SFPR_MAX (218*4)
6783
6784 struct sfpr_def_parms
6785 {
6786 const char name[12];
6787 unsigned char lo, hi;
6788 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6789 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6790 };
6791
6792 /* Auto-generate _save*, _rest* functions in .sfpr.
6793 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6794 instead. */
6795
6796 static bfd_boolean
6797 sfpr_define (struct bfd_link_info *info,
6798 const struct sfpr_def_parms *parm,
6799 asection *stub_sec)
6800 {
6801 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6802 unsigned int i;
6803 size_t len = strlen (parm->name);
6804 bfd_boolean writing = FALSE;
6805 char sym[16];
6806
6807 if (htab == NULL)
6808 return FALSE;
6809
6810 memcpy (sym, parm->name, len);
6811 sym[len + 2] = 0;
6812
6813 for (i = parm->lo; i <= parm->hi; i++)
6814 {
6815 struct ppc_link_hash_entry *h;
6816
6817 sym[len + 0] = i / 10 + '0';
6818 sym[len + 1] = i % 10 + '0';
6819 h = (struct ppc_link_hash_entry *)
6820 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6821 if (stub_sec != NULL)
6822 {
6823 if (h != NULL
6824 && h->elf.root.type == bfd_link_hash_defined
6825 && h->elf.root.u.def.section == htab->sfpr)
6826 {
6827 struct elf_link_hash_entry *s;
6828 char buf[32];
6829 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6830 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6831 if (s == NULL)
6832 return FALSE;
6833 if (s->root.type == bfd_link_hash_new
6834 || (s->root.type = bfd_link_hash_defined
6835 && s->root.u.def.section == stub_sec))
6836 {
6837 s->root.type = bfd_link_hash_defined;
6838 s->root.u.def.section = stub_sec;
6839 s->root.u.def.value = (stub_sec->size
6840 + h->elf.root.u.def.value);
6841 s->ref_regular = 1;
6842 s->def_regular = 1;
6843 s->ref_regular_nonweak = 1;
6844 s->forced_local = 1;
6845 s->non_elf = 0;
6846 s->root.linker_def = 1;
6847 }
6848 }
6849 continue;
6850 }
6851 if (h != NULL)
6852 {
6853 h->save_res = 1;
6854 if (!h->elf.def_regular)
6855 {
6856 h->elf.root.type = bfd_link_hash_defined;
6857 h->elf.root.u.def.section = htab->sfpr;
6858 h->elf.root.u.def.value = htab->sfpr->size;
6859 h->elf.type = STT_FUNC;
6860 h->elf.def_regular = 1;
6861 h->elf.non_elf = 0;
6862 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6863 writing = TRUE;
6864 if (htab->sfpr->contents == NULL)
6865 {
6866 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6867 if (htab->sfpr->contents == NULL)
6868 return FALSE;
6869 }
6870 }
6871 }
6872 if (writing)
6873 {
6874 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6875 if (i != parm->hi)
6876 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6877 else
6878 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6879 htab->sfpr->size = p - htab->sfpr->contents;
6880 }
6881 }
6882
6883 return TRUE;
6884 }
6885
6886 static bfd_byte *
6887 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6888 {
6889 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6890 return p + 4;
6891 }
6892
6893 static bfd_byte *
6894 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6895 {
6896 p = savegpr0 (abfd, p, r);
6897 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6898 p = p + 4;
6899 bfd_put_32 (abfd, BLR, p);
6900 return p + 4;
6901 }
6902
6903 static bfd_byte *
6904 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6905 {
6906 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6907 return p + 4;
6908 }
6909
6910 static bfd_byte *
6911 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6912 {
6913 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6914 p = p + 4;
6915 p = restgpr0 (abfd, p, r);
6916 bfd_put_32 (abfd, MTLR_R0, p);
6917 p = p + 4;
6918 if (r == 29)
6919 {
6920 p = restgpr0 (abfd, p, 30);
6921 p = restgpr0 (abfd, p, 31);
6922 }
6923 bfd_put_32 (abfd, BLR, p);
6924 return p + 4;
6925 }
6926
6927 static bfd_byte *
6928 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6929 {
6930 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6931 return p + 4;
6932 }
6933
6934 static bfd_byte *
6935 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6936 {
6937 p = savegpr1 (abfd, p, r);
6938 bfd_put_32 (abfd, BLR, p);
6939 return p + 4;
6940 }
6941
6942 static bfd_byte *
6943 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6944 {
6945 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6946 return p + 4;
6947 }
6948
6949 static bfd_byte *
6950 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6951 {
6952 p = restgpr1 (abfd, p, r);
6953 bfd_put_32 (abfd, BLR, p);
6954 return p + 4;
6955 }
6956
6957 static bfd_byte *
6958 savefpr (bfd *abfd, bfd_byte *p, int r)
6959 {
6960 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6961 return p + 4;
6962 }
6963
6964 static bfd_byte *
6965 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6966 {
6967 p = savefpr (abfd, p, r);
6968 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6969 p = p + 4;
6970 bfd_put_32 (abfd, BLR, p);
6971 return p + 4;
6972 }
6973
6974 static bfd_byte *
6975 restfpr (bfd *abfd, bfd_byte *p, int r)
6976 {
6977 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6978 return p + 4;
6979 }
6980
6981 static bfd_byte *
6982 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6983 {
6984 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6985 p = p + 4;
6986 p = restfpr (abfd, p, r);
6987 bfd_put_32 (abfd, MTLR_R0, p);
6988 p = p + 4;
6989 if (r == 29)
6990 {
6991 p = restfpr (abfd, p, 30);
6992 p = restfpr (abfd, p, 31);
6993 }
6994 bfd_put_32 (abfd, BLR, p);
6995 return p + 4;
6996 }
6997
6998 static bfd_byte *
6999 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
7000 {
7001 p = savefpr (abfd, p, r);
7002 bfd_put_32 (abfd, BLR, p);
7003 return p + 4;
7004 }
7005
7006 static bfd_byte *
7007 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
7008 {
7009 p = restfpr (abfd, p, r);
7010 bfd_put_32 (abfd, BLR, p);
7011 return p + 4;
7012 }
7013
7014 static bfd_byte *
7015 savevr (bfd *abfd, bfd_byte *p, int r)
7016 {
7017 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7018 p = p + 4;
7019 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
7020 return p + 4;
7021 }
7022
7023 static bfd_byte *
7024 savevr_tail (bfd *abfd, bfd_byte *p, int r)
7025 {
7026 p = savevr (abfd, p, r);
7027 bfd_put_32 (abfd, BLR, p);
7028 return p + 4;
7029 }
7030
7031 static bfd_byte *
7032 restvr (bfd *abfd, bfd_byte *p, int r)
7033 {
7034 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7035 p = p + 4;
7036 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7037 return p + 4;
7038 }
7039
7040 static bfd_byte *
7041 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7042 {
7043 p = restvr (abfd, p, r);
7044 bfd_put_32 (abfd, BLR, p);
7045 return p + 4;
7046 }
7047
7048 /* Called via elf_link_hash_traverse to transfer dynamic linking
7049 information on function code symbol entries to their corresponding
7050 function descriptor symbol entries. */
7051
7052 static bfd_boolean
7053 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7054 {
7055 struct bfd_link_info *info;
7056 struct ppc_link_hash_table *htab;
7057 struct ppc_link_hash_entry *fh;
7058 struct ppc_link_hash_entry *fdh;
7059 bfd_boolean force_local;
7060
7061 fh = (struct ppc_link_hash_entry *) h;
7062 if (fh->elf.root.type == bfd_link_hash_indirect)
7063 return TRUE;
7064
7065 if (!fh->is_func)
7066 return TRUE;
7067
7068 if (fh->elf.root.root.string[0] != '.'
7069 || fh->elf.root.root.string[1] == '\0')
7070 return TRUE;
7071
7072 info = inf;
7073 htab = ppc_hash_table (info);
7074 if (htab == NULL)
7075 return FALSE;
7076
7077 /* Find the corresponding function descriptor symbol. */
7078 fdh = lookup_fdh (fh, htab);
7079
7080 /* Resolve undefined references to dot-symbols as the value
7081 in the function descriptor, if we have one in a regular object.
7082 This is to satisfy cases like ".quad .foo". Calls to functions
7083 in dynamic objects are handled elsewhere. */
7084 if ((fh->elf.root.type == bfd_link_hash_undefined
7085 || fh->elf.root.type == bfd_link_hash_undefweak)
7086 && (fdh->elf.root.type == bfd_link_hash_defined
7087 || fdh->elf.root.type == bfd_link_hash_defweak)
7088 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7089 && opd_entry_value (fdh->elf.root.u.def.section,
7090 fdh->elf.root.u.def.value,
7091 &fh->elf.root.u.def.section,
7092 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7093 {
7094 fh->elf.root.type = fdh->elf.root.type;
7095 fh->elf.forced_local = 1;
7096 fh->elf.def_regular = fdh->elf.def_regular;
7097 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7098 }
7099
7100 if (!fh->elf.dynamic)
7101 {
7102 struct plt_entry *ent;
7103
7104 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7105 if (ent->plt.refcount > 0)
7106 break;
7107 if (ent == NULL)
7108 return TRUE;
7109 }
7110
7111 /* Create a descriptor as undefined if necessary. */
7112 if (fdh == NULL
7113 && !bfd_link_executable (info)
7114 && (fh->elf.root.type == bfd_link_hash_undefined
7115 || fh->elf.root.type == bfd_link_hash_undefweak))
7116 {
7117 fdh = make_fdh (info, fh);
7118 if (fdh == NULL)
7119 return FALSE;
7120 }
7121
7122 /* We can't support overriding of symbols on a fake descriptor. */
7123 if (fdh != NULL
7124 && fdh->fake
7125 && (fh->elf.root.type == bfd_link_hash_defined
7126 || fh->elf.root.type == bfd_link_hash_defweak))
7127 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7128
7129 /* Transfer dynamic linking information to the function descriptor. */
7130 if (fdh != NULL)
7131 {
7132 fdh->elf.ref_regular |= fh->elf.ref_regular;
7133 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7134 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7135 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7136 fdh->elf.dynamic |= fh->elf.dynamic;
7137 fdh->elf.needs_plt |= (fh->elf.needs_plt
7138 || fh->elf.type == STT_FUNC
7139 || fh->elf.type == STT_GNU_IFUNC);
7140 move_plt_plist (fh, fdh);
7141
7142 if (!fdh->elf.forced_local
7143 && fh->elf.dynindx != -1)
7144 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7145 return FALSE;
7146 }
7147
7148 /* Now that the info is on the function descriptor, clear the
7149 function code sym info. Any function code syms for which we
7150 don't have a definition in a regular file, we force local.
7151 This prevents a shared library from exporting syms that have
7152 been imported from another library. Function code syms that
7153 are really in the library we must leave global to prevent the
7154 linker dragging in a definition from a static library. */
7155 force_local = (!fh->elf.def_regular
7156 || fdh == NULL
7157 || !fdh->elf.def_regular
7158 || fdh->elf.forced_local);
7159 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7160
7161 return TRUE;
7162 }
7163
7164 static const struct sfpr_def_parms save_res_funcs[] =
7165 {
7166 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7167 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7168 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7169 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7170 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7171 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7172 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7173 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7174 { "._savef", 14, 31, savefpr, savefpr1_tail },
7175 { "._restf", 14, 31, restfpr, restfpr1_tail },
7176 { "_savevr_", 20, 31, savevr, savevr_tail },
7177 { "_restvr_", 20, 31, restvr, restvr_tail }
7178 };
7179
7180 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7181 this hook to a) provide some gcc support functions, and b) transfer
7182 dynamic linking information gathered so far on function code symbol
7183 entries, to their corresponding function descriptor symbol entries. */
7184
7185 static bfd_boolean
7186 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7187 struct bfd_link_info *info)
7188 {
7189 struct ppc_link_hash_table *htab;
7190
7191 htab = ppc_hash_table (info);
7192 if (htab == NULL)
7193 return FALSE;
7194
7195 /* Provide any missing _save* and _rest* functions. */
7196 if (htab->sfpr != NULL)
7197 {
7198 unsigned int i;
7199
7200 htab->sfpr->size = 0;
7201 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7202 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7203 return FALSE;
7204 if (htab->sfpr->size == 0)
7205 htab->sfpr->flags |= SEC_EXCLUDE;
7206 }
7207
7208 if (bfd_link_relocatable (info))
7209 return TRUE;
7210
7211 if (htab->elf.hgot != NULL)
7212 {
7213 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7214 /* Make .TOC. defined so as to prevent it being made dynamic.
7215 The wrong value here is fixed later in ppc64_elf_set_toc. */
7216 if (!htab->elf.hgot->def_regular
7217 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7218 {
7219 htab->elf.hgot->root.type = bfd_link_hash_defined;
7220 htab->elf.hgot->root.u.def.value = 0;
7221 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7222 htab->elf.hgot->def_regular = 1;
7223 htab->elf.hgot->root.linker_def = 1;
7224 }
7225 htab->elf.hgot->type = STT_OBJECT;
7226 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7227 | STV_HIDDEN);
7228 }
7229
7230 if (htab->need_func_desc_adj)
7231 {
7232 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7233 htab->need_func_desc_adj = 0;
7234 }
7235
7236 return TRUE;
7237 }
7238
7239 /* Return true if we have dynamic relocs against H that apply to
7240 read-only sections. */
7241
7242 static bfd_boolean
7243 readonly_dynrelocs (struct elf_link_hash_entry *h)
7244 {
7245 struct ppc_link_hash_entry *eh;
7246 struct elf_dyn_relocs *p;
7247
7248 eh = (struct ppc_link_hash_entry *) h;
7249 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7250 {
7251 asection *s = p->sec->output_section;
7252
7253 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7254 return TRUE;
7255 }
7256 return FALSE;
7257 }
7258
7259 /* Return true if we have dynamic relocs against H or any of its weak
7260 aliases, that apply to read-only sections. */
7261
7262 static bfd_boolean
7263 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7264 {
7265 struct ppc_link_hash_entry *eh;
7266
7267 eh = (struct ppc_link_hash_entry *) h;
7268 do
7269 {
7270 if (readonly_dynrelocs (&eh->elf))
7271 return TRUE;
7272 eh = eh->weakref;
7273 } while (eh != NULL && &eh->elf != h);
7274
7275 return FALSE;
7276 }
7277
7278 /* Return whether EH has pc-relative dynamic relocs. */
7279
7280 static bfd_boolean
7281 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7282 {
7283 struct elf_dyn_relocs *p;
7284
7285 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7286 if (p->pc_count != 0)
7287 return TRUE;
7288 return FALSE;
7289 }
7290
7291 /* Return true if a global entry stub will be created for H. Valid
7292 for ELFv2 before plt entries have been allocated. */
7293
7294 static bfd_boolean
7295 global_entry_stub (struct elf_link_hash_entry *h)
7296 {
7297 struct plt_entry *pent;
7298
7299 if (!h->pointer_equality_needed
7300 || h->def_regular)
7301 return FALSE;
7302
7303 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7304 if (pent->plt.refcount > 0
7305 && pent->addend == 0)
7306 return TRUE;
7307
7308 return FALSE;
7309 }
7310
7311 /* Adjust a symbol defined by a dynamic object and referenced by a
7312 regular object. The current definition is in some section of the
7313 dynamic object, but we're not including those sections. We have to
7314 change the definition to something the rest of the link can
7315 understand. */
7316
7317 static bfd_boolean
7318 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7319 struct elf_link_hash_entry *h)
7320 {
7321 struct ppc_link_hash_table *htab;
7322 asection *s, *srel;
7323
7324 htab = ppc_hash_table (info);
7325 if (htab == NULL)
7326 return FALSE;
7327
7328 /* Deal with function syms. */
7329 if (h->type == STT_FUNC
7330 || h->type == STT_GNU_IFUNC
7331 || h->needs_plt)
7332 {
7333 /* Clear procedure linkage table information for any symbol that
7334 won't need a .plt entry. */
7335 struct plt_entry *ent;
7336 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7337 if (ent->plt.refcount > 0)
7338 break;
7339 if (ent == NULL
7340 || (h->type != STT_GNU_IFUNC
7341 && (SYMBOL_CALLS_LOCAL (info, h)
7342 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7343 || ((struct ppc_link_hash_entry *) h)->save_res)
7344 {
7345 h->plt.plist = NULL;
7346 h->needs_plt = 0;
7347 h->pointer_equality_needed = 0;
7348 }
7349 else if (abiversion (info->output_bfd) >= 2)
7350 {
7351 /* Taking a function's address in a read/write section
7352 doesn't require us to define the function symbol in the
7353 executable on a global entry stub. A dynamic reloc can
7354 be used instead. The reason we prefer a few more dynamic
7355 relocs is that calling via a global entry stub costs a
7356 few more instructions, and pointer_equality_needed causes
7357 extra work in ld.so when resolving these symbols. */
7358 if (global_entry_stub (h)
7359 && !alias_readonly_dynrelocs (h))
7360 {
7361 h->pointer_equality_needed = 0;
7362 /* After adjust_dynamic_symbol, non_got_ref set in
7363 the non-pic case means that dyn_relocs for this
7364 symbol should be discarded. */
7365 h->non_got_ref = 0;
7366 }
7367
7368 /* If making a plt entry, then we don't need copy relocs. */
7369 return TRUE;
7370 }
7371 }
7372 else
7373 h->plt.plist = NULL;
7374
7375 /* If this is a weak symbol, and there is a real definition, the
7376 processor independent code will have arranged for us to see the
7377 real definition first, and we can just use the same value. */
7378 if (h->u.weakdef != NULL)
7379 {
7380 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7381 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7382 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7383 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7384 if (ELIMINATE_COPY_RELOCS)
7385 h->non_got_ref = h->u.weakdef->non_got_ref;
7386 return TRUE;
7387 }
7388
7389 /* If we are creating a shared library, we must presume that the
7390 only references to the symbol are via the global offset table.
7391 For such cases we need not do anything here; the relocations will
7392 be handled correctly by relocate_section. */
7393 if (bfd_link_pic (info))
7394 return TRUE;
7395
7396 /* If there are no references to this symbol that do not use the
7397 GOT, we don't need to generate a copy reloc. */
7398 if (!h->non_got_ref)
7399 return TRUE;
7400
7401 /* Don't generate a copy reloc for symbols defined in the executable. */
7402 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7403
7404 /* If -z nocopyreloc was given, don't generate them either. */
7405 || info->nocopyreloc
7406
7407 /* If we didn't find any dynamic relocs in read-only sections, then
7408 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7409 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7410
7411 /* Protected variables do not work with .dynbss. The copy in
7412 .dynbss won't be used by the shared library with the protected
7413 definition for the variable. Text relocations are preferable
7414 to an incorrect program. */
7415 || h->protected_def)
7416 {
7417 h->non_got_ref = 0;
7418 return TRUE;
7419 }
7420
7421 if (h->plt.plist != NULL)
7422 {
7423 /* We should never get here, but unfortunately there are versions
7424 of gcc out there that improperly (for this ABI) put initialized
7425 function pointers, vtable refs and suchlike in read-only
7426 sections. Allow them to proceed, but warn that this might
7427 break at runtime. */
7428 info->callbacks->einfo
7429 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7430 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7431 h->root.root.string);
7432 }
7433
7434 /* This is a reference to a symbol defined by a dynamic object which
7435 is not a function. */
7436
7437 /* We must allocate the symbol in our .dynbss section, which will
7438 become part of the .bss section of the executable. There will be
7439 an entry for this symbol in the .dynsym section. The dynamic
7440 object will contain position independent code, so all references
7441 from the dynamic object to this symbol will go through the global
7442 offset table. The dynamic linker will use the .dynsym entry to
7443 determine the address it must put in the global offset table, so
7444 both the dynamic object and the regular object will refer to the
7445 same memory location for the variable. */
7446
7447 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7448 to copy the initial value out of the dynamic object and into the
7449 runtime process image. We need to remember the offset into the
7450 .rela.bss section we are going to use. */
7451 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7452 {
7453 s = htab->elf.sdynrelro;
7454 srel = htab->elf.sreldynrelro;
7455 }
7456 else
7457 {
7458 s = htab->elf.sdynbss;
7459 srel = htab->elf.srelbss;
7460 }
7461 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7462 {
7463 srel->size += sizeof (Elf64_External_Rela);
7464 h->needs_copy = 1;
7465 }
7466
7467 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7468 }
7469
7470 /* If given a function descriptor symbol, hide both the function code
7471 sym and the descriptor. */
7472 static void
7473 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7474 struct elf_link_hash_entry *h,
7475 bfd_boolean force_local)
7476 {
7477 struct ppc_link_hash_entry *eh;
7478 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7479
7480 eh = (struct ppc_link_hash_entry *) h;
7481 if (eh->is_func_descriptor)
7482 {
7483 struct ppc_link_hash_entry *fh = eh->oh;
7484
7485 if (fh == NULL)
7486 {
7487 const char *p, *q;
7488 struct elf_link_hash_table *htab = elf_hash_table (info);
7489 char save;
7490
7491 /* We aren't supposed to use alloca in BFD because on
7492 systems which do not have alloca the version in libiberty
7493 calls xmalloc, which might cause the program to crash
7494 when it runs out of memory. This function doesn't have a
7495 return status, so there's no way to gracefully return an
7496 error. So cheat. We know that string[-1] can be safely
7497 accessed; It's either a string in an ELF string table,
7498 or allocated in an objalloc structure. */
7499
7500 p = eh->elf.root.root.string - 1;
7501 save = *p;
7502 *(char *) p = '.';
7503 fh = (struct ppc_link_hash_entry *)
7504 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7505 *(char *) p = save;
7506
7507 /* Unfortunately, if it so happens that the string we were
7508 looking for was allocated immediately before this string,
7509 then we overwrote the string terminator. That's the only
7510 reason the lookup should fail. */
7511 if (fh == NULL)
7512 {
7513 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7514 while (q >= eh->elf.root.root.string && *q == *p)
7515 --q, --p;
7516 if (q < eh->elf.root.root.string && *p == '.')
7517 fh = (struct ppc_link_hash_entry *)
7518 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7519 }
7520 if (fh != NULL)
7521 {
7522 eh->oh = fh;
7523 fh->oh = eh;
7524 }
7525 }
7526 if (fh != NULL)
7527 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7528 }
7529 }
7530
7531 static bfd_boolean
7532 get_sym_h (struct elf_link_hash_entry **hp,
7533 Elf_Internal_Sym **symp,
7534 asection **symsecp,
7535 unsigned char **tls_maskp,
7536 Elf_Internal_Sym **locsymsp,
7537 unsigned long r_symndx,
7538 bfd *ibfd)
7539 {
7540 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7541
7542 if (r_symndx >= symtab_hdr->sh_info)
7543 {
7544 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7545 struct elf_link_hash_entry *h;
7546
7547 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7548 h = elf_follow_link (h);
7549
7550 if (hp != NULL)
7551 *hp = h;
7552
7553 if (symp != NULL)
7554 *symp = NULL;
7555
7556 if (symsecp != NULL)
7557 {
7558 asection *symsec = NULL;
7559 if (h->root.type == bfd_link_hash_defined
7560 || h->root.type == bfd_link_hash_defweak)
7561 symsec = h->root.u.def.section;
7562 *symsecp = symsec;
7563 }
7564
7565 if (tls_maskp != NULL)
7566 {
7567 struct ppc_link_hash_entry *eh;
7568
7569 eh = (struct ppc_link_hash_entry *) h;
7570 *tls_maskp = &eh->tls_mask;
7571 }
7572 }
7573 else
7574 {
7575 Elf_Internal_Sym *sym;
7576 Elf_Internal_Sym *locsyms = *locsymsp;
7577
7578 if (locsyms == NULL)
7579 {
7580 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7581 if (locsyms == NULL)
7582 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7583 symtab_hdr->sh_info,
7584 0, NULL, NULL, NULL);
7585 if (locsyms == NULL)
7586 return FALSE;
7587 *locsymsp = locsyms;
7588 }
7589 sym = locsyms + r_symndx;
7590
7591 if (hp != NULL)
7592 *hp = NULL;
7593
7594 if (symp != NULL)
7595 *symp = sym;
7596
7597 if (symsecp != NULL)
7598 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7599
7600 if (tls_maskp != NULL)
7601 {
7602 struct got_entry **lgot_ents;
7603 unsigned char *tls_mask;
7604
7605 tls_mask = NULL;
7606 lgot_ents = elf_local_got_ents (ibfd);
7607 if (lgot_ents != NULL)
7608 {
7609 struct plt_entry **local_plt = (struct plt_entry **)
7610 (lgot_ents + symtab_hdr->sh_info);
7611 unsigned char *lgot_masks = (unsigned char *)
7612 (local_plt + symtab_hdr->sh_info);
7613 tls_mask = &lgot_masks[r_symndx];
7614 }
7615 *tls_maskp = tls_mask;
7616 }
7617 }
7618 return TRUE;
7619 }
7620
7621 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7622 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7623 type suitable for optimization, and 1 otherwise. */
7624
7625 static int
7626 get_tls_mask (unsigned char **tls_maskp,
7627 unsigned long *toc_symndx,
7628 bfd_vma *toc_addend,
7629 Elf_Internal_Sym **locsymsp,
7630 const Elf_Internal_Rela *rel,
7631 bfd *ibfd)
7632 {
7633 unsigned long r_symndx;
7634 int next_r;
7635 struct elf_link_hash_entry *h;
7636 Elf_Internal_Sym *sym;
7637 asection *sec;
7638 bfd_vma off;
7639
7640 r_symndx = ELF64_R_SYM (rel->r_info);
7641 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7642 return 0;
7643
7644 if ((*tls_maskp != NULL && **tls_maskp != 0)
7645 || sec == NULL
7646 || ppc64_elf_section_data (sec) == NULL
7647 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7648 return 1;
7649
7650 /* Look inside a TOC section too. */
7651 if (h != NULL)
7652 {
7653 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7654 off = h->root.u.def.value;
7655 }
7656 else
7657 off = sym->st_value;
7658 off += rel->r_addend;
7659 BFD_ASSERT (off % 8 == 0);
7660 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7661 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7662 if (toc_symndx != NULL)
7663 *toc_symndx = r_symndx;
7664 if (toc_addend != NULL)
7665 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7666 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7667 return 0;
7668 if ((h == NULL || is_static_defined (h))
7669 && (next_r == -1 || next_r == -2))
7670 return 1 - next_r;
7671 return 1;
7672 }
7673
7674 /* Find (or create) an entry in the tocsave hash table. */
7675
7676 static struct tocsave_entry *
7677 tocsave_find (struct ppc_link_hash_table *htab,
7678 enum insert_option insert,
7679 Elf_Internal_Sym **local_syms,
7680 const Elf_Internal_Rela *irela,
7681 bfd *ibfd)
7682 {
7683 unsigned long r_indx;
7684 struct elf_link_hash_entry *h;
7685 Elf_Internal_Sym *sym;
7686 struct tocsave_entry ent, *p;
7687 hashval_t hash;
7688 struct tocsave_entry **slot;
7689
7690 r_indx = ELF64_R_SYM (irela->r_info);
7691 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7692 return NULL;
7693 if (ent.sec == NULL || ent.sec->output_section == NULL)
7694 {
7695 _bfd_error_handler
7696 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7697 return NULL;
7698 }
7699
7700 if (h != NULL)
7701 ent.offset = h->root.u.def.value;
7702 else
7703 ent.offset = sym->st_value;
7704 ent.offset += irela->r_addend;
7705
7706 hash = tocsave_htab_hash (&ent);
7707 slot = ((struct tocsave_entry **)
7708 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7709 if (slot == NULL)
7710 return NULL;
7711
7712 if (*slot == NULL)
7713 {
7714 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7715 if (p == NULL)
7716 return NULL;
7717 *p = ent;
7718 *slot = p;
7719 }
7720 return *slot;
7721 }
7722
7723 /* Adjust all global syms defined in opd sections. In gcc generated
7724 code for the old ABI, these will already have been done. */
7725
7726 static bfd_boolean
7727 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7728 {
7729 struct ppc_link_hash_entry *eh;
7730 asection *sym_sec;
7731 struct _opd_sec_data *opd;
7732
7733 if (h->root.type == bfd_link_hash_indirect)
7734 return TRUE;
7735
7736 if (h->root.type != bfd_link_hash_defined
7737 && h->root.type != bfd_link_hash_defweak)
7738 return TRUE;
7739
7740 eh = (struct ppc_link_hash_entry *) h;
7741 if (eh->adjust_done)
7742 return TRUE;
7743
7744 sym_sec = eh->elf.root.u.def.section;
7745 opd = get_opd_info (sym_sec);
7746 if (opd != NULL && opd->adjust != NULL)
7747 {
7748 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7749 if (adjust == -1)
7750 {
7751 /* This entry has been deleted. */
7752 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7753 if (dsec == NULL)
7754 {
7755 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7756 if (discarded_section (dsec))
7757 {
7758 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7759 break;
7760 }
7761 }
7762 eh->elf.root.u.def.value = 0;
7763 eh->elf.root.u.def.section = dsec;
7764 }
7765 else
7766 eh->elf.root.u.def.value += adjust;
7767 eh->adjust_done = 1;
7768 }
7769 return TRUE;
7770 }
7771
7772 /* Handles decrementing dynamic reloc counts for the reloc specified by
7773 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7774 have already been determined. */
7775
7776 static bfd_boolean
7777 dec_dynrel_count (bfd_vma r_info,
7778 asection *sec,
7779 struct bfd_link_info *info,
7780 Elf_Internal_Sym **local_syms,
7781 struct elf_link_hash_entry *h,
7782 Elf_Internal_Sym *sym)
7783 {
7784 enum elf_ppc64_reloc_type r_type;
7785 asection *sym_sec = NULL;
7786
7787 /* Can this reloc be dynamic? This switch, and later tests here
7788 should be kept in sync with the code in check_relocs. */
7789 r_type = ELF64_R_TYPE (r_info);
7790 switch (r_type)
7791 {
7792 default:
7793 return TRUE;
7794
7795 case R_PPC64_TPREL16:
7796 case R_PPC64_TPREL16_LO:
7797 case R_PPC64_TPREL16_HI:
7798 case R_PPC64_TPREL16_HA:
7799 case R_PPC64_TPREL16_DS:
7800 case R_PPC64_TPREL16_LO_DS:
7801 case R_PPC64_TPREL16_HIGH:
7802 case R_PPC64_TPREL16_HIGHA:
7803 case R_PPC64_TPREL16_HIGHER:
7804 case R_PPC64_TPREL16_HIGHERA:
7805 case R_PPC64_TPREL16_HIGHEST:
7806 case R_PPC64_TPREL16_HIGHESTA:
7807 case R_PPC64_TPREL64:
7808 case R_PPC64_DTPMOD64:
7809 case R_PPC64_DTPREL64:
7810 case R_PPC64_ADDR64:
7811 case R_PPC64_REL30:
7812 case R_PPC64_REL32:
7813 case R_PPC64_REL64:
7814 case R_PPC64_ADDR14:
7815 case R_PPC64_ADDR14_BRNTAKEN:
7816 case R_PPC64_ADDR14_BRTAKEN:
7817 case R_PPC64_ADDR16:
7818 case R_PPC64_ADDR16_DS:
7819 case R_PPC64_ADDR16_HA:
7820 case R_PPC64_ADDR16_HI:
7821 case R_PPC64_ADDR16_HIGH:
7822 case R_PPC64_ADDR16_HIGHA:
7823 case R_PPC64_ADDR16_HIGHER:
7824 case R_PPC64_ADDR16_HIGHERA:
7825 case R_PPC64_ADDR16_HIGHEST:
7826 case R_PPC64_ADDR16_HIGHESTA:
7827 case R_PPC64_ADDR16_LO:
7828 case R_PPC64_ADDR16_LO_DS:
7829 case R_PPC64_ADDR24:
7830 case R_PPC64_ADDR32:
7831 case R_PPC64_UADDR16:
7832 case R_PPC64_UADDR32:
7833 case R_PPC64_UADDR64:
7834 case R_PPC64_TOC:
7835 break;
7836 }
7837
7838 if (local_syms != NULL)
7839 {
7840 unsigned long r_symndx;
7841 bfd *ibfd = sec->owner;
7842
7843 r_symndx = ELF64_R_SYM (r_info);
7844 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7845 return FALSE;
7846 }
7847
7848 if ((bfd_link_pic (info)
7849 && (must_be_dyn_reloc (info, r_type)
7850 || (h != NULL
7851 && (!SYMBOLIC_BIND (info, h)
7852 || h->root.type == bfd_link_hash_defweak
7853 || !h->def_regular))))
7854 || (ELIMINATE_COPY_RELOCS
7855 && !bfd_link_pic (info)
7856 && h != NULL
7857 && (h->root.type == bfd_link_hash_defweak
7858 || !h->def_regular)))
7859 ;
7860 else
7861 return TRUE;
7862
7863 if (h != NULL)
7864 {
7865 struct elf_dyn_relocs *p;
7866 struct elf_dyn_relocs **pp;
7867 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7868
7869 /* elf_gc_sweep may have already removed all dyn relocs associated
7870 with local syms for a given section. Also, symbol flags are
7871 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7872 report a dynreloc miscount. */
7873 if (*pp == NULL && info->gc_sections)
7874 return TRUE;
7875
7876 while ((p = *pp) != NULL)
7877 {
7878 if (p->sec == sec)
7879 {
7880 if (!must_be_dyn_reloc (info, r_type))
7881 p->pc_count -= 1;
7882 p->count -= 1;
7883 if (p->count == 0)
7884 *pp = p->next;
7885 return TRUE;
7886 }
7887 pp = &p->next;
7888 }
7889 }
7890 else
7891 {
7892 struct ppc_dyn_relocs *p;
7893 struct ppc_dyn_relocs **pp;
7894 void *vpp;
7895 bfd_boolean is_ifunc;
7896
7897 if (local_syms == NULL)
7898 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7899 if (sym_sec == NULL)
7900 sym_sec = sec;
7901
7902 vpp = &elf_section_data (sym_sec)->local_dynrel;
7903 pp = (struct ppc_dyn_relocs **) vpp;
7904
7905 if (*pp == NULL && info->gc_sections)
7906 return TRUE;
7907
7908 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7909 while ((p = *pp) != NULL)
7910 {
7911 if (p->sec == sec && p->ifunc == is_ifunc)
7912 {
7913 p->count -= 1;
7914 if (p->count == 0)
7915 *pp = p->next;
7916 return TRUE;
7917 }
7918 pp = &p->next;
7919 }
7920 }
7921
7922 /* xgettext:c-format */
7923 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7924 sec->owner, sec);
7925 bfd_set_error (bfd_error_bad_value);
7926 return FALSE;
7927 }
7928
7929 /* Remove unused Official Procedure Descriptor entries. Currently we
7930 only remove those associated with functions in discarded link-once
7931 sections, or weakly defined functions that have been overridden. It
7932 would be possible to remove many more entries for statically linked
7933 applications. */
7934
7935 bfd_boolean
7936 ppc64_elf_edit_opd (struct bfd_link_info *info)
7937 {
7938 bfd *ibfd;
7939 bfd_boolean some_edited = FALSE;
7940 asection *need_pad = NULL;
7941 struct ppc_link_hash_table *htab;
7942
7943 htab = ppc_hash_table (info);
7944 if (htab == NULL)
7945 return FALSE;
7946
7947 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7948 {
7949 asection *sec;
7950 Elf_Internal_Rela *relstart, *rel, *relend;
7951 Elf_Internal_Shdr *symtab_hdr;
7952 Elf_Internal_Sym *local_syms;
7953 struct _opd_sec_data *opd;
7954 bfd_boolean need_edit, add_aux_fields, broken;
7955 bfd_size_type cnt_16b = 0;
7956
7957 if (!is_ppc64_elf (ibfd))
7958 continue;
7959
7960 sec = bfd_get_section_by_name (ibfd, ".opd");
7961 if (sec == NULL || sec->size == 0)
7962 continue;
7963
7964 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7965 continue;
7966
7967 if (sec->output_section == bfd_abs_section_ptr)
7968 continue;
7969
7970 /* Look through the section relocs. */
7971 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7972 continue;
7973
7974 local_syms = NULL;
7975 symtab_hdr = &elf_symtab_hdr (ibfd);
7976
7977 /* Read the relocations. */
7978 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7979 info->keep_memory);
7980 if (relstart == NULL)
7981 return FALSE;
7982
7983 /* First run through the relocs to check they are sane, and to
7984 determine whether we need to edit this opd section. */
7985 need_edit = FALSE;
7986 broken = FALSE;
7987 need_pad = sec;
7988 relend = relstart + sec->reloc_count;
7989 for (rel = relstart; rel < relend; )
7990 {
7991 enum elf_ppc64_reloc_type r_type;
7992 unsigned long r_symndx;
7993 asection *sym_sec;
7994 struct elf_link_hash_entry *h;
7995 Elf_Internal_Sym *sym;
7996 bfd_vma offset;
7997
7998 /* .opd contains an array of 16 or 24 byte entries. We're
7999 only interested in the reloc pointing to a function entry
8000 point. */
8001 offset = rel->r_offset;
8002 if (rel + 1 == relend
8003 || rel[1].r_offset != offset + 8)
8004 {
8005 /* If someone messes with .opd alignment then after a
8006 "ld -r" we might have padding in the middle of .opd.
8007 Also, there's nothing to prevent someone putting
8008 something silly in .opd with the assembler. No .opd
8009 optimization for them! */
8010 broken_opd:
8011 _bfd_error_handler
8012 (_("%B: .opd is not a regular array of opd entries"), ibfd);
8013 broken = TRUE;
8014 break;
8015 }
8016
8017 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
8018 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
8019 {
8020 _bfd_error_handler
8021 /* xgettext:c-format */
8022 (_("%B: unexpected reloc type %u in .opd section"),
8023 ibfd, r_type);
8024 broken = TRUE;
8025 break;
8026 }
8027
8028 r_symndx = ELF64_R_SYM (rel->r_info);
8029 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8030 r_symndx, ibfd))
8031 goto error_ret;
8032
8033 if (sym_sec == NULL || sym_sec->owner == NULL)
8034 {
8035 const char *sym_name;
8036 if (h != NULL)
8037 sym_name = h->root.root.string;
8038 else
8039 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8040 sym_sec);
8041
8042 _bfd_error_handler
8043 /* xgettext:c-format */
8044 (_("%B: undefined sym `%s' in .opd section"),
8045 ibfd, sym_name);
8046 broken = TRUE;
8047 break;
8048 }
8049
8050 /* opd entries are always for functions defined in the
8051 current input bfd. If the symbol isn't defined in the
8052 input bfd, then we won't be using the function in this
8053 bfd; It must be defined in a linkonce section in another
8054 bfd, or is weak. It's also possible that we are
8055 discarding the function due to a linker script /DISCARD/,
8056 which we test for via the output_section. */
8057 if (sym_sec->owner != ibfd
8058 || sym_sec->output_section == bfd_abs_section_ptr)
8059 need_edit = TRUE;
8060
8061 rel += 2;
8062 if (rel + 1 == relend
8063 || (rel + 2 < relend
8064 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8065 ++rel;
8066
8067 if (rel == relend)
8068 {
8069 if (sec->size == offset + 24)
8070 {
8071 need_pad = NULL;
8072 break;
8073 }
8074 if (sec->size == offset + 16)
8075 {
8076 cnt_16b++;
8077 break;
8078 }
8079 goto broken_opd;
8080 }
8081 else if (rel + 1 < relend
8082 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8083 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8084 {
8085 if (rel[0].r_offset == offset + 16)
8086 cnt_16b++;
8087 else if (rel[0].r_offset != offset + 24)
8088 goto broken_opd;
8089 }
8090 else
8091 goto broken_opd;
8092 }
8093
8094 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8095
8096 if (!broken && (need_edit || add_aux_fields))
8097 {
8098 Elf_Internal_Rela *write_rel;
8099 Elf_Internal_Shdr *rel_hdr;
8100 bfd_byte *rptr, *wptr;
8101 bfd_byte *new_contents;
8102 bfd_size_type amt;
8103
8104 new_contents = NULL;
8105 amt = OPD_NDX (sec->size) * sizeof (long);
8106 opd = &ppc64_elf_section_data (sec)->u.opd;
8107 opd->adjust = bfd_zalloc (sec->owner, amt);
8108 if (opd->adjust == NULL)
8109 return FALSE;
8110 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8111
8112 /* This seems a waste of time as input .opd sections are all
8113 zeros as generated by gcc, but I suppose there's no reason
8114 this will always be so. We might start putting something in
8115 the third word of .opd entries. */
8116 if ((sec->flags & SEC_IN_MEMORY) == 0)
8117 {
8118 bfd_byte *loc;
8119 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8120 {
8121 if (loc != NULL)
8122 free (loc);
8123 error_ret:
8124 if (local_syms != NULL
8125 && symtab_hdr->contents != (unsigned char *) local_syms)
8126 free (local_syms);
8127 if (elf_section_data (sec)->relocs != relstart)
8128 free (relstart);
8129 return FALSE;
8130 }
8131 sec->contents = loc;
8132 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8133 }
8134
8135 elf_section_data (sec)->relocs = relstart;
8136
8137 new_contents = sec->contents;
8138 if (add_aux_fields)
8139 {
8140 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8141 if (new_contents == NULL)
8142 return FALSE;
8143 need_pad = NULL;
8144 }
8145 wptr = new_contents;
8146 rptr = sec->contents;
8147 write_rel = relstart;
8148 for (rel = relstart; rel < relend; )
8149 {
8150 unsigned long r_symndx;
8151 asection *sym_sec;
8152 struct elf_link_hash_entry *h;
8153 struct ppc_link_hash_entry *fdh = NULL;
8154 Elf_Internal_Sym *sym;
8155 long opd_ent_size;
8156 Elf_Internal_Rela *next_rel;
8157 bfd_boolean skip;
8158
8159 r_symndx = ELF64_R_SYM (rel->r_info);
8160 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8161 r_symndx, ibfd))
8162 goto error_ret;
8163
8164 next_rel = rel + 2;
8165 if (next_rel + 1 == relend
8166 || (next_rel + 2 < relend
8167 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8168 ++next_rel;
8169
8170 /* See if the .opd entry is full 24 byte or
8171 16 byte (with fd_aux entry overlapped with next
8172 fd_func). */
8173 opd_ent_size = 24;
8174 if (next_rel == relend)
8175 {
8176 if (sec->size == rel->r_offset + 16)
8177 opd_ent_size = 16;
8178 }
8179 else if (next_rel->r_offset == rel->r_offset + 16)
8180 opd_ent_size = 16;
8181
8182 if (h != NULL
8183 && h->root.root.string[0] == '.')
8184 {
8185 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8186 if (fdh != NULL)
8187 {
8188 fdh = ppc_follow_link (fdh);
8189 if (fdh->elf.root.type != bfd_link_hash_defined
8190 && fdh->elf.root.type != bfd_link_hash_defweak)
8191 fdh = NULL;
8192 }
8193 }
8194
8195 skip = (sym_sec->owner != ibfd
8196 || sym_sec->output_section == bfd_abs_section_ptr);
8197 if (skip)
8198 {
8199 if (fdh != NULL && sym_sec->owner == ibfd)
8200 {
8201 /* Arrange for the function descriptor sym
8202 to be dropped. */
8203 fdh->elf.root.u.def.value = 0;
8204 fdh->elf.root.u.def.section = sym_sec;
8205 }
8206 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8207
8208 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8209 rel = next_rel;
8210 else
8211 while (1)
8212 {
8213 if (!dec_dynrel_count (rel->r_info, sec, info,
8214 NULL, h, sym))
8215 goto error_ret;
8216
8217 if (++rel == next_rel)
8218 break;
8219
8220 r_symndx = ELF64_R_SYM (rel->r_info);
8221 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8222 r_symndx, ibfd))
8223 goto error_ret;
8224 }
8225 }
8226 else
8227 {
8228 /* We'll be keeping this opd entry. */
8229 long adjust;
8230
8231 if (fdh != NULL)
8232 {
8233 /* Redefine the function descriptor symbol to
8234 this location in the opd section. It is
8235 necessary to update the value here rather
8236 than using an array of adjustments as we do
8237 for local symbols, because various places
8238 in the generic ELF code use the value
8239 stored in u.def.value. */
8240 fdh->elf.root.u.def.value = wptr - new_contents;
8241 fdh->adjust_done = 1;
8242 }
8243
8244 /* Local syms are a bit tricky. We could
8245 tweak them as they can be cached, but
8246 we'd need to look through the local syms
8247 for the function descriptor sym which we
8248 don't have at the moment. So keep an
8249 array of adjustments. */
8250 adjust = (wptr - new_contents) - (rptr - sec->contents);
8251 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8252
8253 if (wptr != rptr)
8254 memcpy (wptr, rptr, opd_ent_size);
8255 wptr += opd_ent_size;
8256 if (add_aux_fields && opd_ent_size == 16)
8257 {
8258 memset (wptr, '\0', 8);
8259 wptr += 8;
8260 }
8261
8262 /* We need to adjust any reloc offsets to point to the
8263 new opd entries. */
8264 for ( ; rel != next_rel; ++rel)
8265 {
8266 rel->r_offset += adjust;
8267 if (write_rel != rel)
8268 memcpy (write_rel, rel, sizeof (*rel));
8269 ++write_rel;
8270 }
8271 }
8272
8273 rptr += opd_ent_size;
8274 }
8275
8276 sec->size = wptr - new_contents;
8277 sec->reloc_count = write_rel - relstart;
8278 if (add_aux_fields)
8279 {
8280 free (sec->contents);
8281 sec->contents = new_contents;
8282 }
8283
8284 /* Fudge the header size too, as this is used later in
8285 elf_bfd_final_link if we are emitting relocs. */
8286 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8287 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8288 some_edited = TRUE;
8289 }
8290 else if (elf_section_data (sec)->relocs != relstart)
8291 free (relstart);
8292
8293 if (local_syms != NULL
8294 && symtab_hdr->contents != (unsigned char *) local_syms)
8295 {
8296 if (!info->keep_memory)
8297 free (local_syms);
8298 else
8299 symtab_hdr->contents = (unsigned char *) local_syms;
8300 }
8301 }
8302
8303 if (some_edited)
8304 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8305
8306 /* If we are doing a final link and the last .opd entry is just 16 byte
8307 long, add a 8 byte padding after it. */
8308 if (need_pad != NULL && !bfd_link_relocatable (info))
8309 {
8310 bfd_byte *p;
8311
8312 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8313 {
8314 BFD_ASSERT (need_pad->size > 0);
8315
8316 p = bfd_malloc (need_pad->size + 8);
8317 if (p == NULL)
8318 return FALSE;
8319
8320 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8321 p, 0, need_pad->size))
8322 return FALSE;
8323
8324 need_pad->contents = p;
8325 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8326 }
8327 else
8328 {
8329 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8330 if (p == NULL)
8331 return FALSE;
8332
8333 need_pad->contents = p;
8334 }
8335
8336 memset (need_pad->contents + need_pad->size, 0, 8);
8337 need_pad->size += 8;
8338 }
8339
8340 return TRUE;
8341 }
8342
8343 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8344
8345 asection *
8346 ppc64_elf_tls_setup (struct bfd_link_info *info)
8347 {
8348 struct ppc_link_hash_table *htab;
8349
8350 htab = ppc_hash_table (info);
8351 if (htab == NULL)
8352 return NULL;
8353
8354 if (abiversion (info->output_bfd) == 1)
8355 htab->opd_abi = 1;
8356
8357 if (htab->params->no_multi_toc)
8358 htab->do_multi_toc = 0;
8359 else if (!htab->do_multi_toc)
8360 htab->params->no_multi_toc = 1;
8361
8362 /* Default to --no-plt-localentry, as this option can cause problems
8363 with symbol interposition. For example, glibc libpthread.so and
8364 libc.so duplicate many pthread symbols, with a fallback
8365 implementation in libc.so. In some cases the fallback does more
8366 work than the pthread implementation. __pthread_condattr_destroy
8367 is one such symbol: the libpthread.so implementation is
8368 localentry:0 while the libc.so implementation is localentry:8.
8369 An app that "cleverly" uses dlopen to only load necessary
8370 libraries at runtime may omit loading libpthread.so when not
8371 running multi-threaded, which then results in the libc.so
8372 fallback symbols being used and ld.so complaining. Now there
8373 are workarounds in ld (see non_zero_localentry) to detect the
8374 pthread situation, but that may not be the only case where
8375 --plt-localentry can cause trouble. */
8376 if (htab->params->plt_localentry0 < 0)
8377 htab->params->plt_localentry0 = 0;
8378 if (htab->params->plt_localentry0
8379 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8380 FALSE, FALSE, FALSE) == NULL)
8381 info->callbacks->einfo
8382 (_("%P: warning: --plt-localentry is especially dangerous without "
8383 "ld.so support to detect ABI violations.\n"));
8384
8385 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8386 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8387 FALSE, FALSE, TRUE));
8388 /* Move dynamic linking info to the function descriptor sym. */
8389 if (htab->tls_get_addr != NULL)
8390 func_desc_adjust (&htab->tls_get_addr->elf, info);
8391 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8392 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8393 FALSE, FALSE, TRUE));
8394 if (htab->params->tls_get_addr_opt)
8395 {
8396 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8397
8398 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8399 FALSE, FALSE, TRUE);
8400 if (opt != NULL)
8401 func_desc_adjust (opt, info);
8402 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8403 FALSE, FALSE, TRUE);
8404 if (opt_fd != NULL
8405 && (opt_fd->root.type == bfd_link_hash_defined
8406 || opt_fd->root.type == bfd_link_hash_defweak))
8407 {
8408 /* If glibc supports an optimized __tls_get_addr call stub,
8409 signalled by the presence of __tls_get_addr_opt, and we'll
8410 be calling __tls_get_addr via a plt call stub, then
8411 make __tls_get_addr point to __tls_get_addr_opt. */
8412 tga_fd = &htab->tls_get_addr_fd->elf;
8413 if (htab->elf.dynamic_sections_created
8414 && tga_fd != NULL
8415 && (tga_fd->type == STT_FUNC
8416 || tga_fd->needs_plt)
8417 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8418 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8419 {
8420 struct plt_entry *ent;
8421
8422 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8423 if (ent->plt.refcount > 0)
8424 break;
8425 if (ent != NULL)
8426 {
8427 tga_fd->root.type = bfd_link_hash_indirect;
8428 tga_fd->root.u.i.link = &opt_fd->root;
8429 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8430 opt_fd->mark = 1;
8431 if (opt_fd->dynindx != -1)
8432 {
8433 /* Use __tls_get_addr_opt in dynamic relocations. */
8434 opt_fd->dynindx = -1;
8435 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8436 opt_fd->dynstr_index);
8437 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8438 return NULL;
8439 }
8440 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8441 tga = &htab->tls_get_addr->elf;
8442 if (opt != NULL && tga != NULL)
8443 {
8444 tga->root.type = bfd_link_hash_indirect;
8445 tga->root.u.i.link = &opt->root;
8446 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8447 opt->mark = 1;
8448 _bfd_elf_link_hash_hide_symbol (info, opt,
8449 tga->forced_local);
8450 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8451 }
8452 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8453 htab->tls_get_addr_fd->is_func_descriptor = 1;
8454 if (htab->tls_get_addr != NULL)
8455 {
8456 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8457 htab->tls_get_addr->is_func = 1;
8458 }
8459 }
8460 }
8461 }
8462 else if (htab->params->tls_get_addr_opt < 0)
8463 htab->params->tls_get_addr_opt = 0;
8464 }
8465 return _bfd_elf_tls_setup (info->output_bfd, info);
8466 }
8467
8468 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8469 HASH1 or HASH2. */
8470
8471 static bfd_boolean
8472 branch_reloc_hash_match (const bfd *ibfd,
8473 const Elf_Internal_Rela *rel,
8474 const struct ppc_link_hash_entry *hash1,
8475 const struct ppc_link_hash_entry *hash2)
8476 {
8477 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8478 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8479 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8480
8481 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8482 {
8483 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8484 struct elf_link_hash_entry *h;
8485
8486 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8487 h = elf_follow_link (h);
8488 if (h == &hash1->elf || h == &hash2->elf)
8489 return TRUE;
8490 }
8491 return FALSE;
8492 }
8493
8494 /* Run through all the TLS relocs looking for optimization
8495 opportunities. The linker has been hacked (see ppc64elf.em) to do
8496 a preliminary section layout so that we know the TLS segment
8497 offsets. We can't optimize earlier because some optimizations need
8498 to know the tp offset, and we need to optimize before allocating
8499 dynamic relocations. */
8500
8501 bfd_boolean
8502 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8503 {
8504 bfd *ibfd;
8505 asection *sec;
8506 struct ppc_link_hash_table *htab;
8507 unsigned char *toc_ref;
8508 int pass;
8509
8510 if (!bfd_link_executable (info))
8511 return TRUE;
8512
8513 htab = ppc_hash_table (info);
8514 if (htab == NULL)
8515 return FALSE;
8516
8517 /* Make two passes over the relocs. On the first pass, mark toc
8518 entries involved with tls relocs, and check that tls relocs
8519 involved in setting up a tls_get_addr call are indeed followed by
8520 such a call. If they are not, we can't do any tls optimization.
8521 On the second pass twiddle tls_mask flags to notify
8522 relocate_section that optimization can be done, and adjust got
8523 and plt refcounts. */
8524 toc_ref = NULL;
8525 for (pass = 0; pass < 2; ++pass)
8526 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8527 {
8528 Elf_Internal_Sym *locsyms = NULL;
8529 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8530
8531 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8532 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8533 {
8534 Elf_Internal_Rela *relstart, *rel, *relend;
8535 bfd_boolean found_tls_get_addr_arg = 0;
8536
8537 /* Read the relocations. */
8538 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8539 info->keep_memory);
8540 if (relstart == NULL)
8541 {
8542 free (toc_ref);
8543 return FALSE;
8544 }
8545
8546 relend = relstart + sec->reloc_count;
8547 for (rel = relstart; rel < relend; rel++)
8548 {
8549 enum elf_ppc64_reloc_type r_type;
8550 unsigned long r_symndx;
8551 struct elf_link_hash_entry *h;
8552 Elf_Internal_Sym *sym;
8553 asection *sym_sec;
8554 unsigned char *tls_mask;
8555 unsigned char tls_set, tls_clear, tls_type = 0;
8556 bfd_vma value;
8557 bfd_boolean ok_tprel, is_local;
8558 long toc_ref_index = 0;
8559 int expecting_tls_get_addr = 0;
8560 bfd_boolean ret = FALSE;
8561
8562 r_symndx = ELF64_R_SYM (rel->r_info);
8563 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8564 r_symndx, ibfd))
8565 {
8566 err_free_rel:
8567 if (elf_section_data (sec)->relocs != relstart)
8568 free (relstart);
8569 if (toc_ref != NULL)
8570 free (toc_ref);
8571 if (locsyms != NULL
8572 && (elf_symtab_hdr (ibfd).contents
8573 != (unsigned char *) locsyms))
8574 free (locsyms);
8575 return ret;
8576 }
8577
8578 if (h != NULL)
8579 {
8580 if (h->root.type == bfd_link_hash_defined
8581 || h->root.type == bfd_link_hash_defweak)
8582 value = h->root.u.def.value;
8583 else if (h->root.type == bfd_link_hash_undefweak)
8584 value = 0;
8585 else
8586 {
8587 found_tls_get_addr_arg = 0;
8588 continue;
8589 }
8590 }
8591 else
8592 /* Symbols referenced by TLS relocs must be of type
8593 STT_TLS. So no need for .opd local sym adjust. */
8594 value = sym->st_value;
8595
8596 ok_tprel = FALSE;
8597 is_local = FALSE;
8598 if (h == NULL
8599 || !h->def_dynamic)
8600 {
8601 is_local = TRUE;
8602 if (h != NULL
8603 && h->root.type == bfd_link_hash_undefweak)
8604 ok_tprel = TRUE;
8605 else if (sym_sec != NULL
8606 && sym_sec->output_section != NULL)
8607 {
8608 value += sym_sec->output_offset;
8609 value += sym_sec->output_section->vma;
8610 value -= htab->elf.tls_sec->vma;
8611 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8612 < (bfd_vma) 1 << 32);
8613 }
8614 }
8615
8616 r_type = ELF64_R_TYPE (rel->r_info);
8617 /* If this section has old-style __tls_get_addr calls
8618 without marker relocs, then check that each
8619 __tls_get_addr call reloc is preceded by a reloc
8620 that conceivably belongs to the __tls_get_addr arg
8621 setup insn. If we don't find matching arg setup
8622 relocs, don't do any tls optimization. */
8623 if (pass == 0
8624 && sec->has_tls_get_addr_call
8625 && h != NULL
8626 && (h == &htab->tls_get_addr->elf
8627 || h == &htab->tls_get_addr_fd->elf)
8628 && !found_tls_get_addr_arg
8629 && is_branch_reloc (r_type))
8630 {
8631 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8632 "TLS optimization disabled\n"),
8633 ibfd, sec, rel->r_offset);
8634 ret = TRUE;
8635 goto err_free_rel;
8636 }
8637
8638 found_tls_get_addr_arg = 0;
8639 switch (r_type)
8640 {
8641 case R_PPC64_GOT_TLSLD16:
8642 case R_PPC64_GOT_TLSLD16_LO:
8643 expecting_tls_get_addr = 1;
8644 found_tls_get_addr_arg = 1;
8645 /* Fall through. */
8646
8647 case R_PPC64_GOT_TLSLD16_HI:
8648 case R_PPC64_GOT_TLSLD16_HA:
8649 /* These relocs should never be against a symbol
8650 defined in a shared lib. Leave them alone if
8651 that turns out to be the case. */
8652 if (!is_local)
8653 continue;
8654
8655 /* LD -> LE */
8656 tls_set = 0;
8657 tls_clear = TLS_LD;
8658 tls_type = TLS_TLS | TLS_LD;
8659 break;
8660
8661 case R_PPC64_GOT_TLSGD16:
8662 case R_PPC64_GOT_TLSGD16_LO:
8663 expecting_tls_get_addr = 1;
8664 found_tls_get_addr_arg = 1;
8665 /* Fall through. */
8666
8667 case R_PPC64_GOT_TLSGD16_HI:
8668 case R_PPC64_GOT_TLSGD16_HA:
8669 if (ok_tprel)
8670 /* GD -> LE */
8671 tls_set = 0;
8672 else
8673 /* GD -> IE */
8674 tls_set = TLS_TLS | TLS_TPRELGD;
8675 tls_clear = TLS_GD;
8676 tls_type = TLS_TLS | TLS_GD;
8677 break;
8678
8679 case R_PPC64_GOT_TPREL16_DS:
8680 case R_PPC64_GOT_TPREL16_LO_DS:
8681 case R_PPC64_GOT_TPREL16_HI:
8682 case R_PPC64_GOT_TPREL16_HA:
8683 if (ok_tprel)
8684 {
8685 /* IE -> LE */
8686 tls_set = 0;
8687 tls_clear = TLS_TPREL;
8688 tls_type = TLS_TLS | TLS_TPREL;
8689 break;
8690 }
8691 continue;
8692
8693 case R_PPC64_TLSGD:
8694 case R_PPC64_TLSLD:
8695 found_tls_get_addr_arg = 1;
8696 /* Fall through. */
8697
8698 case R_PPC64_TLS:
8699 case R_PPC64_TOC16:
8700 case R_PPC64_TOC16_LO:
8701 if (sym_sec == NULL || sym_sec != toc)
8702 continue;
8703
8704 /* Mark this toc entry as referenced by a TLS
8705 code sequence. We can do that now in the
8706 case of R_PPC64_TLS, and after checking for
8707 tls_get_addr for the TOC16 relocs. */
8708 if (toc_ref == NULL)
8709 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8710 if (toc_ref == NULL)
8711 goto err_free_rel;
8712
8713 if (h != NULL)
8714 value = h->root.u.def.value;
8715 else
8716 value = sym->st_value;
8717 value += rel->r_addend;
8718 if (value % 8 != 0)
8719 continue;
8720 BFD_ASSERT (value < toc->size
8721 && toc->output_offset % 8 == 0);
8722 toc_ref_index = (value + toc->output_offset) / 8;
8723 if (r_type == R_PPC64_TLS
8724 || r_type == R_PPC64_TLSGD
8725 || r_type == R_PPC64_TLSLD)
8726 {
8727 toc_ref[toc_ref_index] = 1;
8728 continue;
8729 }
8730
8731 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8732 continue;
8733
8734 tls_set = 0;
8735 tls_clear = 0;
8736 expecting_tls_get_addr = 2;
8737 break;
8738
8739 case R_PPC64_TPREL64:
8740 if (pass == 0
8741 || sec != toc
8742 || toc_ref == NULL
8743 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8744 continue;
8745 if (ok_tprel)
8746 {
8747 /* IE -> LE */
8748 tls_set = TLS_EXPLICIT;
8749 tls_clear = TLS_TPREL;
8750 break;
8751 }
8752 continue;
8753
8754 case R_PPC64_DTPMOD64:
8755 if (pass == 0
8756 || sec != toc
8757 || toc_ref == NULL
8758 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8759 continue;
8760 if (rel + 1 < relend
8761 && (rel[1].r_info
8762 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8763 && rel[1].r_offset == rel->r_offset + 8)
8764 {
8765 if (ok_tprel)
8766 /* GD -> LE */
8767 tls_set = TLS_EXPLICIT | TLS_GD;
8768 else
8769 /* GD -> IE */
8770 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8771 tls_clear = TLS_GD;
8772 }
8773 else
8774 {
8775 if (!is_local)
8776 continue;
8777
8778 /* LD -> LE */
8779 tls_set = TLS_EXPLICIT;
8780 tls_clear = TLS_LD;
8781 }
8782 break;
8783
8784 default:
8785 continue;
8786 }
8787
8788 if (pass == 0)
8789 {
8790 if (!expecting_tls_get_addr
8791 || !sec->has_tls_get_addr_call)
8792 continue;
8793
8794 if (rel + 1 < relend
8795 && branch_reloc_hash_match (ibfd, rel + 1,
8796 htab->tls_get_addr,
8797 htab->tls_get_addr_fd))
8798 {
8799 if (expecting_tls_get_addr == 2)
8800 {
8801 /* Check for toc tls entries. */
8802 unsigned char *toc_tls;
8803 int retval;
8804
8805 retval = get_tls_mask (&toc_tls, NULL, NULL,
8806 &locsyms,
8807 rel, ibfd);
8808 if (retval == 0)
8809 goto err_free_rel;
8810 if (toc_tls != NULL)
8811 {
8812 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8813 found_tls_get_addr_arg = 1;
8814 if (retval > 1)
8815 toc_ref[toc_ref_index] = 1;
8816 }
8817 }
8818 continue;
8819 }
8820
8821 if (expecting_tls_get_addr != 1)
8822 continue;
8823
8824 /* Uh oh, we didn't find the expected call. We
8825 could just mark this symbol to exclude it
8826 from tls optimization but it's safer to skip
8827 the entire optimization. */
8828 /* xgettext:c-format */
8829 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8830 "TLS optimization disabled\n"),
8831 ibfd, sec, rel->r_offset);
8832 ret = TRUE;
8833 goto err_free_rel;
8834 }
8835
8836 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8837 {
8838 struct plt_entry *ent;
8839 for (ent = htab->tls_get_addr->elf.plt.plist;
8840 ent != NULL;
8841 ent = ent->next)
8842 if (ent->addend == 0)
8843 {
8844 if (ent->plt.refcount > 0)
8845 {
8846 ent->plt.refcount -= 1;
8847 expecting_tls_get_addr = 0;
8848 }
8849 break;
8850 }
8851 }
8852
8853 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8854 {
8855 struct plt_entry *ent;
8856 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8857 ent != NULL;
8858 ent = ent->next)
8859 if (ent->addend == 0)
8860 {
8861 if (ent->plt.refcount > 0)
8862 ent->plt.refcount -= 1;
8863 break;
8864 }
8865 }
8866
8867 if (tls_clear == 0)
8868 continue;
8869
8870 if ((tls_set & TLS_EXPLICIT) == 0)
8871 {
8872 struct got_entry *ent;
8873
8874 /* Adjust got entry for this reloc. */
8875 if (h != NULL)
8876 ent = h->got.glist;
8877 else
8878 ent = elf_local_got_ents (ibfd)[r_symndx];
8879
8880 for (; ent != NULL; ent = ent->next)
8881 if (ent->addend == rel->r_addend
8882 && ent->owner == ibfd
8883 && ent->tls_type == tls_type)
8884 break;
8885 if (ent == NULL)
8886 abort ();
8887
8888 if (tls_set == 0)
8889 {
8890 /* We managed to get rid of a got entry. */
8891 if (ent->got.refcount > 0)
8892 ent->got.refcount -= 1;
8893 }
8894 }
8895 else
8896 {
8897 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8898 we'll lose one or two dyn relocs. */
8899 if (!dec_dynrel_count (rel->r_info, sec, info,
8900 NULL, h, sym))
8901 return FALSE;
8902
8903 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8904 {
8905 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8906 NULL, h, sym))
8907 return FALSE;
8908 }
8909 }
8910
8911 *tls_mask |= tls_set;
8912 *tls_mask &= ~tls_clear;
8913 }
8914
8915 if (elf_section_data (sec)->relocs != relstart)
8916 free (relstart);
8917 }
8918
8919 if (locsyms != NULL
8920 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8921 {
8922 if (!info->keep_memory)
8923 free (locsyms);
8924 else
8925 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8926 }
8927 }
8928
8929 if (toc_ref != NULL)
8930 free (toc_ref);
8931 htab->do_tls_opt = 1;
8932 return TRUE;
8933 }
8934
8935 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8936 the values of any global symbols in a toc section that has been
8937 edited. Globals in toc sections should be a rarity, so this function
8938 sets a flag if any are found in toc sections other than the one just
8939 edited, so that further hash table traversals can be avoided. */
8940
8941 struct adjust_toc_info
8942 {
8943 asection *toc;
8944 unsigned long *skip;
8945 bfd_boolean global_toc_syms;
8946 };
8947
8948 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8949
8950 static bfd_boolean
8951 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8952 {
8953 struct ppc_link_hash_entry *eh;
8954 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8955 unsigned long i;
8956
8957 if (h->root.type != bfd_link_hash_defined
8958 && h->root.type != bfd_link_hash_defweak)
8959 return TRUE;
8960
8961 eh = (struct ppc_link_hash_entry *) h;
8962 if (eh->adjust_done)
8963 return TRUE;
8964
8965 if (eh->elf.root.u.def.section == toc_inf->toc)
8966 {
8967 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8968 i = toc_inf->toc->rawsize >> 3;
8969 else
8970 i = eh->elf.root.u.def.value >> 3;
8971
8972 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8973 {
8974 _bfd_error_handler
8975 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8976 do
8977 ++i;
8978 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8979 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8980 }
8981
8982 eh->elf.root.u.def.value -= toc_inf->skip[i];
8983 eh->adjust_done = 1;
8984 }
8985 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8986 toc_inf->global_toc_syms = TRUE;
8987
8988 return TRUE;
8989 }
8990
8991 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8992 on a _LO variety toc/got reloc. */
8993
8994 static bfd_boolean
8995 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8996 {
8997 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8998 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8999 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
9000 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
9001 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
9002 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
9003 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
9004 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
9005 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
9006 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
9007 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
9008 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
9009 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
9010 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
9011 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
9012 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
9013 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
9014 /* Exclude lfqu by testing reloc. If relocs are ever
9015 defined for the reduced D field in psq_lu then those
9016 will need testing too. */
9017 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9018 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
9019 && (insn & 1) == 0)
9020 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
9021 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
9022 /* Exclude stfqu. psq_stu as above for psq_lu. */
9023 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9024 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
9025 && (insn & 1) == 0));
9026 }
9027
9028 /* Examine all relocs referencing .toc sections in order to remove
9029 unused .toc entries. */
9030
9031 bfd_boolean
9032 ppc64_elf_edit_toc (struct bfd_link_info *info)
9033 {
9034 bfd *ibfd;
9035 struct adjust_toc_info toc_inf;
9036 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9037
9038 htab->do_toc_opt = 1;
9039 toc_inf.global_toc_syms = TRUE;
9040 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9041 {
9042 asection *toc, *sec;
9043 Elf_Internal_Shdr *symtab_hdr;
9044 Elf_Internal_Sym *local_syms;
9045 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9046 unsigned long *skip, *drop;
9047 unsigned char *used;
9048 unsigned char *keep, last, some_unused;
9049
9050 if (!is_ppc64_elf (ibfd))
9051 continue;
9052
9053 toc = bfd_get_section_by_name (ibfd, ".toc");
9054 if (toc == NULL
9055 || toc->size == 0
9056 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9057 || discarded_section (toc))
9058 continue;
9059
9060 toc_relocs = NULL;
9061 local_syms = NULL;
9062 symtab_hdr = &elf_symtab_hdr (ibfd);
9063
9064 /* Look at sections dropped from the final link. */
9065 skip = NULL;
9066 relstart = NULL;
9067 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9068 {
9069 if (sec->reloc_count == 0
9070 || !discarded_section (sec)
9071 || get_opd_info (sec)
9072 || (sec->flags & SEC_ALLOC) == 0
9073 || (sec->flags & SEC_DEBUGGING) != 0)
9074 continue;
9075
9076 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9077 if (relstart == NULL)
9078 goto error_ret;
9079
9080 /* Run through the relocs to see which toc entries might be
9081 unused. */
9082 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9083 {
9084 enum elf_ppc64_reloc_type r_type;
9085 unsigned long r_symndx;
9086 asection *sym_sec;
9087 struct elf_link_hash_entry *h;
9088 Elf_Internal_Sym *sym;
9089 bfd_vma val;
9090
9091 r_type = ELF64_R_TYPE (rel->r_info);
9092 switch (r_type)
9093 {
9094 default:
9095 continue;
9096
9097 case R_PPC64_TOC16:
9098 case R_PPC64_TOC16_LO:
9099 case R_PPC64_TOC16_HI:
9100 case R_PPC64_TOC16_HA:
9101 case R_PPC64_TOC16_DS:
9102 case R_PPC64_TOC16_LO_DS:
9103 break;
9104 }
9105
9106 r_symndx = ELF64_R_SYM (rel->r_info);
9107 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9108 r_symndx, ibfd))
9109 goto error_ret;
9110
9111 if (sym_sec != toc)
9112 continue;
9113
9114 if (h != NULL)
9115 val = h->root.u.def.value;
9116 else
9117 val = sym->st_value;
9118 val += rel->r_addend;
9119
9120 if (val >= toc->size)
9121 continue;
9122
9123 /* Anything in the toc ought to be aligned to 8 bytes.
9124 If not, don't mark as unused. */
9125 if (val & 7)
9126 continue;
9127
9128 if (skip == NULL)
9129 {
9130 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9131 if (skip == NULL)
9132 goto error_ret;
9133 }
9134
9135 skip[val >> 3] = ref_from_discarded;
9136 }
9137
9138 if (elf_section_data (sec)->relocs != relstart)
9139 free (relstart);
9140 }
9141
9142 /* For largetoc loads of address constants, we can convert
9143 . addis rx,2,addr@got@ha
9144 . ld ry,addr@got@l(rx)
9145 to
9146 . addis rx,2,addr@toc@ha
9147 . addi ry,rx,addr@toc@l
9148 when addr is within 2G of the toc pointer. This then means
9149 that the word storing "addr" in the toc is no longer needed. */
9150
9151 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9152 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9153 && toc->reloc_count != 0)
9154 {
9155 /* Read toc relocs. */
9156 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9157 info->keep_memory);
9158 if (toc_relocs == NULL)
9159 goto error_ret;
9160
9161 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9162 {
9163 enum elf_ppc64_reloc_type r_type;
9164 unsigned long r_symndx;
9165 asection *sym_sec;
9166 struct elf_link_hash_entry *h;
9167 Elf_Internal_Sym *sym;
9168 bfd_vma val, addr;
9169
9170 r_type = ELF64_R_TYPE (rel->r_info);
9171 if (r_type != R_PPC64_ADDR64)
9172 continue;
9173
9174 r_symndx = ELF64_R_SYM (rel->r_info);
9175 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9176 r_symndx, ibfd))
9177 goto error_ret;
9178
9179 if (sym_sec == NULL
9180 || sym_sec->output_section == NULL
9181 || discarded_section (sym_sec))
9182 continue;
9183
9184 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9185 continue;
9186
9187 if (h != NULL)
9188 {
9189 if (h->type == STT_GNU_IFUNC)
9190 continue;
9191 val = h->root.u.def.value;
9192 }
9193 else
9194 {
9195 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9196 continue;
9197 val = sym->st_value;
9198 }
9199 val += rel->r_addend;
9200 val += sym_sec->output_section->vma + sym_sec->output_offset;
9201
9202 /* We don't yet know the exact toc pointer value, but we
9203 know it will be somewhere in the toc section. Don't
9204 optimize if the difference from any possible toc
9205 pointer is outside [ff..f80008000, 7fff7fff]. */
9206 addr = toc->output_section->vma + TOC_BASE_OFF;
9207 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9208 continue;
9209
9210 addr = toc->output_section->vma + toc->output_section->rawsize;
9211 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9212 continue;
9213
9214 if (skip == NULL)
9215 {
9216 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9217 if (skip == NULL)
9218 goto error_ret;
9219 }
9220
9221 skip[rel->r_offset >> 3]
9222 |= can_optimize | ((rel - toc_relocs) << 2);
9223 }
9224 }
9225
9226 if (skip == NULL)
9227 continue;
9228
9229 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9230 if (used == NULL)
9231 {
9232 error_ret:
9233 if (local_syms != NULL
9234 && symtab_hdr->contents != (unsigned char *) local_syms)
9235 free (local_syms);
9236 if (sec != NULL
9237 && relstart != NULL
9238 && elf_section_data (sec)->relocs != relstart)
9239 free (relstart);
9240 if (toc_relocs != NULL
9241 && elf_section_data (toc)->relocs != toc_relocs)
9242 free (toc_relocs);
9243 if (skip != NULL)
9244 free (skip);
9245 return FALSE;
9246 }
9247
9248 /* Now check all kept sections that might reference the toc.
9249 Check the toc itself last. */
9250 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9251 : ibfd->sections);
9252 sec != NULL;
9253 sec = (sec == toc ? NULL
9254 : sec->next == NULL ? toc
9255 : sec->next == toc && toc->next ? toc->next
9256 : sec->next))
9257 {
9258 int repeat;
9259
9260 if (sec->reloc_count == 0
9261 || discarded_section (sec)
9262 || get_opd_info (sec)
9263 || (sec->flags & SEC_ALLOC) == 0
9264 || (sec->flags & SEC_DEBUGGING) != 0)
9265 continue;
9266
9267 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9268 info->keep_memory);
9269 if (relstart == NULL)
9270 {
9271 free (used);
9272 goto error_ret;
9273 }
9274
9275 /* Mark toc entries referenced as used. */
9276 do
9277 {
9278 repeat = 0;
9279 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9280 {
9281 enum elf_ppc64_reloc_type r_type;
9282 unsigned long r_symndx;
9283 asection *sym_sec;
9284 struct elf_link_hash_entry *h;
9285 Elf_Internal_Sym *sym;
9286 bfd_vma val;
9287 enum {no_check, check_lo, check_ha} insn_check;
9288
9289 r_type = ELF64_R_TYPE (rel->r_info);
9290 switch (r_type)
9291 {
9292 default:
9293 insn_check = no_check;
9294 break;
9295
9296 case R_PPC64_GOT_TLSLD16_HA:
9297 case R_PPC64_GOT_TLSGD16_HA:
9298 case R_PPC64_GOT_TPREL16_HA:
9299 case R_PPC64_GOT_DTPREL16_HA:
9300 case R_PPC64_GOT16_HA:
9301 case R_PPC64_TOC16_HA:
9302 insn_check = check_ha;
9303 break;
9304
9305 case R_PPC64_GOT_TLSLD16_LO:
9306 case R_PPC64_GOT_TLSGD16_LO:
9307 case R_PPC64_GOT_TPREL16_LO_DS:
9308 case R_PPC64_GOT_DTPREL16_LO_DS:
9309 case R_PPC64_GOT16_LO:
9310 case R_PPC64_GOT16_LO_DS:
9311 case R_PPC64_TOC16_LO:
9312 case R_PPC64_TOC16_LO_DS:
9313 insn_check = check_lo;
9314 break;
9315 }
9316
9317 if (insn_check != no_check)
9318 {
9319 bfd_vma off = rel->r_offset & ~3;
9320 unsigned char buf[4];
9321 unsigned int insn;
9322
9323 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9324 {
9325 free (used);
9326 goto error_ret;
9327 }
9328 insn = bfd_get_32 (ibfd, buf);
9329 if (insn_check == check_lo
9330 ? !ok_lo_toc_insn (insn, r_type)
9331 : ((insn & ((0x3f << 26) | 0x1f << 16))
9332 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9333 {
9334 char str[12];
9335
9336 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9337 sprintf (str, "%#08x", insn);
9338 info->callbacks->einfo
9339 /* xgettext:c-format */
9340 (_("%H: toc optimization is not supported for"
9341 " %s instruction.\n"),
9342 ibfd, sec, rel->r_offset & ~3, str);
9343 }
9344 }
9345
9346 switch (r_type)
9347 {
9348 case R_PPC64_TOC16:
9349 case R_PPC64_TOC16_LO:
9350 case R_PPC64_TOC16_HI:
9351 case R_PPC64_TOC16_HA:
9352 case R_PPC64_TOC16_DS:
9353 case R_PPC64_TOC16_LO_DS:
9354 /* In case we're taking addresses of toc entries. */
9355 case R_PPC64_ADDR64:
9356 break;
9357
9358 default:
9359 continue;
9360 }
9361
9362 r_symndx = ELF64_R_SYM (rel->r_info);
9363 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9364 r_symndx, ibfd))
9365 {
9366 free (used);
9367 goto error_ret;
9368 }
9369
9370 if (sym_sec != toc)
9371 continue;
9372
9373 if (h != NULL)
9374 val = h->root.u.def.value;
9375 else
9376 val = sym->st_value;
9377 val += rel->r_addend;
9378
9379 if (val >= toc->size)
9380 continue;
9381
9382 if ((skip[val >> 3] & can_optimize) != 0)
9383 {
9384 bfd_vma off;
9385 unsigned char opc;
9386
9387 switch (r_type)
9388 {
9389 case R_PPC64_TOC16_HA:
9390 break;
9391
9392 case R_PPC64_TOC16_LO_DS:
9393 off = rel->r_offset;
9394 off += (bfd_big_endian (ibfd) ? -2 : 3);
9395 if (!bfd_get_section_contents (ibfd, sec, &opc,
9396 off, 1))
9397 {
9398 free (used);
9399 goto error_ret;
9400 }
9401 if ((opc & (0x3f << 2)) == (58u << 2))
9402 break;
9403 /* Fall through. */
9404
9405 default:
9406 /* Wrong sort of reloc, or not a ld. We may
9407 as well clear ref_from_discarded too. */
9408 skip[val >> 3] = 0;
9409 }
9410 }
9411
9412 if (sec != toc)
9413 used[val >> 3] = 1;
9414 /* For the toc section, we only mark as used if this
9415 entry itself isn't unused. */
9416 else if ((used[rel->r_offset >> 3]
9417 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9418 && !used[val >> 3])
9419 {
9420 /* Do all the relocs again, to catch reference
9421 chains. */
9422 repeat = 1;
9423 used[val >> 3] = 1;
9424 }
9425 }
9426 }
9427 while (repeat);
9428
9429 if (elf_section_data (sec)->relocs != relstart)
9430 free (relstart);
9431 }
9432
9433 /* Merge the used and skip arrays. Assume that TOC
9434 doublewords not appearing as either used or unused belong
9435 to an entry more than one doubleword in size. */
9436 for (drop = skip, keep = used, last = 0, some_unused = 0;
9437 drop < skip + (toc->size + 7) / 8;
9438 ++drop, ++keep)
9439 {
9440 if (*keep)
9441 {
9442 *drop &= ~ref_from_discarded;
9443 if ((*drop & can_optimize) != 0)
9444 some_unused = 1;
9445 last = 0;
9446 }
9447 else if ((*drop & ref_from_discarded) != 0)
9448 {
9449 some_unused = 1;
9450 last = ref_from_discarded;
9451 }
9452 else
9453 *drop = last;
9454 }
9455
9456 free (used);
9457
9458 if (some_unused)
9459 {
9460 bfd_byte *contents, *src;
9461 unsigned long off;
9462 Elf_Internal_Sym *sym;
9463 bfd_boolean local_toc_syms = FALSE;
9464
9465 /* Shuffle the toc contents, and at the same time convert the
9466 skip array from booleans into offsets. */
9467 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9468 goto error_ret;
9469
9470 elf_section_data (toc)->this_hdr.contents = contents;
9471
9472 for (src = contents, off = 0, drop = skip;
9473 src < contents + toc->size;
9474 src += 8, ++drop)
9475 {
9476 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9477 off += 8;
9478 else if (off != 0)
9479 {
9480 *drop = off;
9481 memcpy (src - off, src, 8);
9482 }
9483 }
9484 *drop = off;
9485 toc->rawsize = toc->size;
9486 toc->size = src - contents - off;
9487
9488 /* Adjust addends for relocs against the toc section sym,
9489 and optimize any accesses we can. */
9490 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9491 {
9492 if (sec->reloc_count == 0
9493 || discarded_section (sec))
9494 continue;
9495
9496 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9497 info->keep_memory);
9498 if (relstart == NULL)
9499 goto error_ret;
9500
9501 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9502 {
9503 enum elf_ppc64_reloc_type r_type;
9504 unsigned long r_symndx;
9505 asection *sym_sec;
9506 struct elf_link_hash_entry *h;
9507 bfd_vma val;
9508
9509 r_type = ELF64_R_TYPE (rel->r_info);
9510 switch (r_type)
9511 {
9512 default:
9513 continue;
9514
9515 case R_PPC64_TOC16:
9516 case R_PPC64_TOC16_LO:
9517 case R_PPC64_TOC16_HI:
9518 case R_PPC64_TOC16_HA:
9519 case R_PPC64_TOC16_DS:
9520 case R_PPC64_TOC16_LO_DS:
9521 case R_PPC64_ADDR64:
9522 break;
9523 }
9524
9525 r_symndx = ELF64_R_SYM (rel->r_info);
9526 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9527 r_symndx, ibfd))
9528 goto error_ret;
9529
9530 if (sym_sec != toc)
9531 continue;
9532
9533 if (h != NULL)
9534 val = h->root.u.def.value;
9535 else
9536 {
9537 val = sym->st_value;
9538 if (val != 0)
9539 local_toc_syms = TRUE;
9540 }
9541
9542 val += rel->r_addend;
9543
9544 if (val > toc->rawsize)
9545 val = toc->rawsize;
9546 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9547 continue;
9548 else if ((skip[val >> 3] & can_optimize) != 0)
9549 {
9550 Elf_Internal_Rela *tocrel
9551 = toc_relocs + (skip[val >> 3] >> 2);
9552 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9553
9554 switch (r_type)
9555 {
9556 case R_PPC64_TOC16_HA:
9557 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9558 break;
9559
9560 case R_PPC64_TOC16_LO_DS:
9561 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9562 break;
9563
9564 default:
9565 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9566 ppc_howto_init ();
9567 info->callbacks->einfo
9568 /* xgettext:c-format */
9569 (_("%H: %s references "
9570 "optimized away TOC entry\n"),
9571 ibfd, sec, rel->r_offset,
9572 ppc64_elf_howto_table[r_type]->name);
9573 bfd_set_error (bfd_error_bad_value);
9574 goto error_ret;
9575 }
9576 rel->r_addend = tocrel->r_addend;
9577 elf_section_data (sec)->relocs = relstart;
9578 continue;
9579 }
9580
9581 if (h != NULL || sym->st_value != 0)
9582 continue;
9583
9584 rel->r_addend -= skip[val >> 3];
9585 elf_section_data (sec)->relocs = relstart;
9586 }
9587
9588 if (elf_section_data (sec)->relocs != relstart)
9589 free (relstart);
9590 }
9591
9592 /* We shouldn't have local or global symbols defined in the TOC,
9593 but handle them anyway. */
9594 if (local_syms != NULL)
9595 for (sym = local_syms;
9596 sym < local_syms + symtab_hdr->sh_info;
9597 ++sym)
9598 if (sym->st_value != 0
9599 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9600 {
9601 unsigned long i;
9602
9603 if (sym->st_value > toc->rawsize)
9604 i = toc->rawsize >> 3;
9605 else
9606 i = sym->st_value >> 3;
9607
9608 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9609 {
9610 if (local_toc_syms)
9611 _bfd_error_handler
9612 (_("%s defined on removed toc entry"),
9613 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9614 do
9615 ++i;
9616 while ((skip[i] & (ref_from_discarded | can_optimize)));
9617 sym->st_value = (bfd_vma) i << 3;
9618 }
9619
9620 sym->st_value -= skip[i];
9621 symtab_hdr->contents = (unsigned char *) local_syms;
9622 }
9623
9624 /* Adjust any global syms defined in this toc input section. */
9625 if (toc_inf.global_toc_syms)
9626 {
9627 toc_inf.toc = toc;
9628 toc_inf.skip = skip;
9629 toc_inf.global_toc_syms = FALSE;
9630 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9631 &toc_inf);
9632 }
9633
9634 if (toc->reloc_count != 0)
9635 {
9636 Elf_Internal_Shdr *rel_hdr;
9637 Elf_Internal_Rela *wrel;
9638 bfd_size_type sz;
9639
9640 /* Remove unused toc relocs, and adjust those we keep. */
9641 if (toc_relocs == NULL)
9642 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9643 info->keep_memory);
9644 if (toc_relocs == NULL)
9645 goto error_ret;
9646
9647 wrel = toc_relocs;
9648 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9649 if ((skip[rel->r_offset >> 3]
9650 & (ref_from_discarded | can_optimize)) == 0)
9651 {
9652 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9653 wrel->r_info = rel->r_info;
9654 wrel->r_addend = rel->r_addend;
9655 ++wrel;
9656 }
9657 else if (!dec_dynrel_count (rel->r_info, toc, info,
9658 &local_syms, NULL, NULL))
9659 goto error_ret;
9660
9661 elf_section_data (toc)->relocs = toc_relocs;
9662 toc->reloc_count = wrel - toc_relocs;
9663 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9664 sz = rel_hdr->sh_entsize;
9665 rel_hdr->sh_size = toc->reloc_count * sz;
9666 }
9667 }
9668 else if (toc_relocs != NULL
9669 && elf_section_data (toc)->relocs != toc_relocs)
9670 free (toc_relocs);
9671
9672 if (local_syms != NULL
9673 && symtab_hdr->contents != (unsigned char *) local_syms)
9674 {
9675 if (!info->keep_memory)
9676 free (local_syms);
9677 else
9678 symtab_hdr->contents = (unsigned char *) local_syms;
9679 }
9680 free (skip);
9681 }
9682
9683 return TRUE;
9684 }
9685
9686 /* Return true iff input section I references the TOC using
9687 instructions limited to +/-32k offsets. */
9688
9689 bfd_boolean
9690 ppc64_elf_has_small_toc_reloc (asection *i)
9691 {
9692 return (is_ppc64_elf (i->owner)
9693 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9694 }
9695
9696 /* Allocate space for one GOT entry. */
9697
9698 static void
9699 allocate_got (struct elf_link_hash_entry *h,
9700 struct bfd_link_info *info,
9701 struct got_entry *gent)
9702 {
9703 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9704 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9705 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9706 ? 16 : 8);
9707 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9708 ? 2 : 1) * sizeof (Elf64_External_Rela);
9709 asection *got = ppc64_elf_tdata (gent->owner)->got;
9710
9711 gent->got.offset = got->size;
9712 got->size += entsize;
9713
9714 if (h->type == STT_GNU_IFUNC)
9715 {
9716 htab->elf.irelplt->size += rentsize;
9717 htab->got_reli_size += rentsize;
9718 }
9719 else if ((bfd_link_pic (info)
9720 || (htab->elf.dynamic_sections_created
9721 && h->dynindx != -1
9722 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9723 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9724 {
9725 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9726 relgot->size += rentsize;
9727 }
9728 }
9729
9730 /* This function merges got entries in the same toc group. */
9731
9732 static void
9733 merge_got_entries (struct got_entry **pent)
9734 {
9735 struct got_entry *ent, *ent2;
9736
9737 for (ent = *pent; ent != NULL; ent = ent->next)
9738 if (!ent->is_indirect)
9739 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9740 if (!ent2->is_indirect
9741 && ent2->addend == ent->addend
9742 && ent2->tls_type == ent->tls_type
9743 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9744 {
9745 ent2->is_indirect = TRUE;
9746 ent2->got.ent = ent;
9747 }
9748 }
9749
9750 /* If H is undefined, make it dynamic if that makes sense. */
9751
9752 static bfd_boolean
9753 ensure_undef_dynamic (struct bfd_link_info *info,
9754 struct elf_link_hash_entry *h)
9755 {
9756 struct elf_link_hash_table *htab = elf_hash_table (info);
9757
9758 if (htab->dynamic_sections_created
9759 && ((info->dynamic_undefined_weak != 0
9760 && h->root.type == bfd_link_hash_undefweak)
9761 || h->root.type == bfd_link_hash_undefined)
9762 && h->dynindx == -1
9763 && !h->forced_local
9764 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9765 return bfd_elf_link_record_dynamic_symbol (info, h);
9766 return TRUE;
9767 }
9768
9769 /* Allocate space in .plt, .got and associated reloc sections for
9770 dynamic relocs. */
9771
9772 static bfd_boolean
9773 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9774 {
9775 struct bfd_link_info *info;
9776 struct ppc_link_hash_table *htab;
9777 asection *s;
9778 struct ppc_link_hash_entry *eh;
9779 struct got_entry **pgent, *gent;
9780
9781 if (h->root.type == bfd_link_hash_indirect)
9782 return TRUE;
9783
9784 info = (struct bfd_link_info *) inf;
9785 htab = ppc_hash_table (info);
9786 if (htab == NULL)
9787 return FALSE;
9788
9789 eh = (struct ppc_link_hash_entry *) h;
9790 /* Run through the TLS GD got entries first if we're changing them
9791 to TPREL. */
9792 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9793 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9794 if (gent->got.refcount > 0
9795 && (gent->tls_type & TLS_GD) != 0)
9796 {
9797 /* This was a GD entry that has been converted to TPREL. If
9798 there happens to be a TPREL entry we can use that one. */
9799 struct got_entry *ent;
9800 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9801 if (ent->got.refcount > 0
9802 && (ent->tls_type & TLS_TPREL) != 0
9803 && ent->addend == gent->addend
9804 && ent->owner == gent->owner)
9805 {
9806 gent->got.refcount = 0;
9807 break;
9808 }
9809
9810 /* If not, then we'll be using our own TPREL entry. */
9811 if (gent->got.refcount != 0)
9812 gent->tls_type = TLS_TLS | TLS_TPREL;
9813 }
9814
9815 /* Remove any list entry that won't generate a word in the GOT before
9816 we call merge_got_entries. Otherwise we risk merging to empty
9817 entries. */
9818 pgent = &h->got.glist;
9819 while ((gent = *pgent) != NULL)
9820 if (gent->got.refcount > 0)
9821 {
9822 if ((gent->tls_type & TLS_LD) != 0
9823 && !h->def_dynamic)
9824 {
9825 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9826 *pgent = gent->next;
9827 }
9828 else
9829 pgent = &gent->next;
9830 }
9831 else
9832 *pgent = gent->next;
9833
9834 if (!htab->do_multi_toc)
9835 merge_got_entries (&h->got.glist);
9836
9837 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9838 if (!gent->is_indirect)
9839 {
9840 /* Make sure this symbol is output as a dynamic symbol. */
9841 if (!ensure_undef_dynamic (info, h))
9842 return FALSE;
9843
9844 if (!is_ppc64_elf (gent->owner))
9845 abort ();
9846
9847 allocate_got (h, info, gent);
9848 }
9849
9850 /* If no dynamic sections we can't have dynamic relocs, except for
9851 IFUNCs which are handled even in static executables. */
9852 if (!htab->elf.dynamic_sections_created
9853 && h->type != STT_GNU_IFUNC)
9854 eh->dyn_relocs = NULL;
9855
9856 /* Also discard relocs on undefined weak syms with non-default
9857 visibility, or when dynamic_undefined_weak says so. */
9858 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9859 eh->dyn_relocs = NULL;
9860
9861 if (eh->dyn_relocs != NULL)
9862 {
9863 struct elf_dyn_relocs *p, **pp;
9864
9865 /* In the shared -Bsymbolic case, discard space allocated for
9866 dynamic pc-relative relocs against symbols which turn out to
9867 be defined in regular objects. For the normal shared case,
9868 discard space for relocs that have become local due to symbol
9869 visibility changes. */
9870
9871 if (bfd_link_pic (info))
9872 {
9873 /* Relocs that use pc_count are those that appear on a call
9874 insn, or certain REL relocs (see must_be_dyn_reloc) that
9875 can be generated via assembly. We want calls to
9876 protected symbols to resolve directly to the function
9877 rather than going via the plt. If people want function
9878 pointer comparisons to work as expected then they should
9879 avoid writing weird assembly. */
9880 if (SYMBOL_CALLS_LOCAL (info, h))
9881 {
9882 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9883 {
9884 p->count -= p->pc_count;
9885 p->pc_count = 0;
9886 if (p->count == 0)
9887 *pp = p->next;
9888 else
9889 pp = &p->next;
9890 }
9891 }
9892
9893 if (eh->dyn_relocs != NULL)
9894 {
9895 /* Make sure this symbol is output as a dynamic symbol. */
9896 if (!ensure_undef_dynamic (info, h))
9897 return FALSE;
9898 }
9899 }
9900 else if (h->type == STT_GNU_IFUNC)
9901 {
9902 /* A plt entry is always created when making direct calls to
9903 an ifunc, even when building a static executable, but
9904 that doesn't cover all cases. We may have only an ifunc
9905 initialised function pointer for a given ifunc symbol.
9906
9907 For ELFv2, dynamic relocations are not required when
9908 generating a global entry PLT stub. */
9909 if (abiversion (info->output_bfd) >= 2)
9910 {
9911 if (global_entry_stub (h))
9912 eh->dyn_relocs = NULL;
9913 }
9914
9915 /* For ELFv1 we have function descriptors. Descriptors need
9916 to be treated like PLT entries and thus have dynamic
9917 relocations. One exception is when the function
9918 descriptor is copied into .dynbss (which should only
9919 happen with ancient versions of gcc). */
9920 else if (h->needs_copy)
9921 eh->dyn_relocs = NULL;
9922 }
9923 else if (ELIMINATE_COPY_RELOCS)
9924 {
9925 /* For the non-pic case, discard space for relocs against
9926 symbols which turn out to need copy relocs or are not
9927 dynamic. */
9928 if (!h->non_got_ref
9929 && !h->def_regular)
9930 {
9931 /* Make sure this symbol is output as a dynamic symbol. */
9932 if (!ensure_undef_dynamic (info, h))
9933 return FALSE;
9934
9935 if (h->dynindx == -1)
9936 eh->dyn_relocs = NULL;
9937 }
9938 else
9939 eh->dyn_relocs = NULL;
9940 }
9941
9942 /* Finally, allocate space. */
9943 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9944 {
9945 asection *sreloc = elf_section_data (p->sec)->sreloc;
9946 if (eh->elf.type == STT_GNU_IFUNC)
9947 sreloc = htab->elf.irelplt;
9948 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9949 }
9950 }
9951
9952 if ((htab->elf.dynamic_sections_created
9953 && h->dynindx != -1)
9954 || h->type == STT_GNU_IFUNC)
9955 {
9956 struct plt_entry *pent;
9957 bfd_boolean doneone = FALSE;
9958 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9959 if (pent->plt.refcount > 0)
9960 {
9961 if (!htab->elf.dynamic_sections_created
9962 || h->dynindx == -1)
9963 {
9964 s = htab->elf.iplt;
9965 pent->plt.offset = s->size;
9966 s->size += PLT_ENTRY_SIZE (htab);
9967 s = htab->elf.irelplt;
9968 }
9969 else
9970 {
9971 /* If this is the first .plt entry, make room for the special
9972 first entry. */
9973 s = htab->elf.splt;
9974 if (s->size == 0)
9975 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9976
9977 pent->plt.offset = s->size;
9978
9979 /* Make room for this entry. */
9980 s->size += PLT_ENTRY_SIZE (htab);
9981
9982 /* Make room for the .glink code. */
9983 s = htab->glink;
9984 if (s->size == 0)
9985 s->size += GLINK_CALL_STUB_SIZE;
9986 if (htab->opd_abi)
9987 {
9988 /* We need bigger stubs past index 32767. */
9989 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9990 s->size += 4;
9991 s->size += 2*4;
9992 }
9993 else
9994 s->size += 4;
9995
9996 /* We also need to make an entry in the .rela.plt section. */
9997 s = htab->elf.srelplt;
9998 }
9999 s->size += sizeof (Elf64_External_Rela);
10000 doneone = TRUE;
10001 }
10002 else
10003 pent->plt.offset = (bfd_vma) -1;
10004 if (!doneone)
10005 {
10006 h->plt.plist = NULL;
10007 h->needs_plt = 0;
10008 }
10009 }
10010 else
10011 {
10012 h->plt.plist = NULL;
10013 h->needs_plt = 0;
10014 }
10015
10016 return TRUE;
10017 }
10018
10019 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
10020 to set up space for global entry stubs. These are put in glink,
10021 after the branch table. */
10022
10023 static bfd_boolean
10024 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
10025 {
10026 struct bfd_link_info *info;
10027 struct ppc_link_hash_table *htab;
10028 struct plt_entry *pent;
10029 asection *s;
10030
10031 if (h->root.type == bfd_link_hash_indirect)
10032 return TRUE;
10033
10034 if (!h->pointer_equality_needed)
10035 return TRUE;
10036
10037 if (h->def_regular)
10038 return TRUE;
10039
10040 info = inf;
10041 htab = ppc_hash_table (info);
10042 if (htab == NULL)
10043 return FALSE;
10044
10045 s = htab->glink;
10046 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10047 if (pent->plt.offset != (bfd_vma) -1
10048 && pent->addend == 0)
10049 {
10050 /* For ELFv2, if this symbol is not defined in a regular file
10051 and we are not generating a shared library or pie, then we
10052 need to define the symbol in the executable on a call stub.
10053 This is to avoid text relocations. */
10054 s->size = (s->size + 15) & -16;
10055 h->root.type = bfd_link_hash_defined;
10056 h->root.u.def.section = s;
10057 h->root.u.def.value = s->size;
10058 s->size += 16;
10059 break;
10060 }
10061 return TRUE;
10062 }
10063
10064 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10065 read-only sections. */
10066
10067 static bfd_boolean
10068 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10069 {
10070 if (h->root.type == bfd_link_hash_indirect)
10071 return TRUE;
10072
10073 if (readonly_dynrelocs (h))
10074 {
10075 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10076
10077 /* Not an error, just cut short the traversal. */
10078 return FALSE;
10079 }
10080 return TRUE;
10081 }
10082
10083 /* Set the sizes of the dynamic sections. */
10084
10085 static bfd_boolean
10086 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10087 struct bfd_link_info *info)
10088 {
10089 struct ppc_link_hash_table *htab;
10090 bfd *dynobj;
10091 asection *s;
10092 bfd_boolean relocs;
10093 bfd *ibfd;
10094 struct got_entry *first_tlsld;
10095
10096 htab = ppc_hash_table (info);
10097 if (htab == NULL)
10098 return FALSE;
10099
10100 dynobj = htab->elf.dynobj;
10101 if (dynobj == NULL)
10102 abort ();
10103
10104 if (htab->elf.dynamic_sections_created)
10105 {
10106 /* Set the contents of the .interp section to the interpreter. */
10107 if (bfd_link_executable (info) && !info->nointerp)
10108 {
10109 s = bfd_get_linker_section (dynobj, ".interp");
10110 if (s == NULL)
10111 abort ();
10112 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10113 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10114 }
10115 }
10116
10117 /* Set up .got offsets for local syms, and space for local dynamic
10118 relocs. */
10119 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10120 {
10121 struct got_entry **lgot_ents;
10122 struct got_entry **end_lgot_ents;
10123 struct plt_entry **local_plt;
10124 struct plt_entry **end_local_plt;
10125 unsigned char *lgot_masks;
10126 bfd_size_type locsymcount;
10127 Elf_Internal_Shdr *symtab_hdr;
10128
10129 if (!is_ppc64_elf (ibfd))
10130 continue;
10131
10132 for (s = ibfd->sections; s != NULL; s = s->next)
10133 {
10134 struct ppc_dyn_relocs *p;
10135
10136 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10137 {
10138 if (!bfd_is_abs_section (p->sec)
10139 && bfd_is_abs_section (p->sec->output_section))
10140 {
10141 /* Input section has been discarded, either because
10142 it is a copy of a linkonce section or due to
10143 linker script /DISCARD/, so we'll be discarding
10144 the relocs too. */
10145 }
10146 else if (p->count != 0)
10147 {
10148 asection *srel = elf_section_data (p->sec)->sreloc;
10149 if (p->ifunc)
10150 srel = htab->elf.irelplt;
10151 srel->size += p->count * sizeof (Elf64_External_Rela);
10152 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10153 info->flags |= DF_TEXTREL;
10154 }
10155 }
10156 }
10157
10158 lgot_ents = elf_local_got_ents (ibfd);
10159 if (!lgot_ents)
10160 continue;
10161
10162 symtab_hdr = &elf_symtab_hdr (ibfd);
10163 locsymcount = symtab_hdr->sh_info;
10164 end_lgot_ents = lgot_ents + locsymcount;
10165 local_plt = (struct plt_entry **) end_lgot_ents;
10166 end_local_plt = local_plt + locsymcount;
10167 lgot_masks = (unsigned char *) end_local_plt;
10168 s = ppc64_elf_tdata (ibfd)->got;
10169 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10170 {
10171 struct got_entry **pent, *ent;
10172
10173 pent = lgot_ents;
10174 while ((ent = *pent) != NULL)
10175 if (ent->got.refcount > 0)
10176 {
10177 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10178 {
10179 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10180 *pent = ent->next;
10181 }
10182 else
10183 {
10184 unsigned int ent_size = 8;
10185 unsigned int rel_size = sizeof (Elf64_External_Rela);
10186
10187 ent->got.offset = s->size;
10188 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10189 {
10190 ent_size *= 2;
10191 rel_size *= 2;
10192 }
10193 s->size += ent_size;
10194 if ((*lgot_masks & PLT_IFUNC) != 0)
10195 {
10196 htab->elf.irelplt->size += rel_size;
10197 htab->got_reli_size += rel_size;
10198 }
10199 else if (bfd_link_pic (info))
10200 {
10201 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10202 srel->size += rel_size;
10203 }
10204 pent = &ent->next;
10205 }
10206 }
10207 else
10208 *pent = ent->next;
10209 }
10210
10211 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10212 for (; local_plt < end_local_plt; ++local_plt)
10213 {
10214 struct plt_entry *ent;
10215
10216 for (ent = *local_plt; ent != NULL; ent = ent->next)
10217 if (ent->plt.refcount > 0)
10218 {
10219 s = htab->elf.iplt;
10220 ent->plt.offset = s->size;
10221 s->size += PLT_ENTRY_SIZE (htab);
10222
10223 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10224 }
10225 else
10226 ent->plt.offset = (bfd_vma) -1;
10227 }
10228 }
10229
10230 /* Allocate global sym .plt and .got entries, and space for global
10231 sym dynamic relocs. */
10232 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10233 /* Stash the end of glink branch table. */
10234 if (htab->glink != NULL)
10235 htab->glink->rawsize = htab->glink->size;
10236
10237 if (!htab->opd_abi && !bfd_link_pic (info))
10238 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10239
10240 first_tlsld = NULL;
10241 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10242 {
10243 struct got_entry *ent;
10244
10245 if (!is_ppc64_elf (ibfd))
10246 continue;
10247
10248 ent = ppc64_tlsld_got (ibfd);
10249 if (ent->got.refcount > 0)
10250 {
10251 if (!htab->do_multi_toc && first_tlsld != NULL)
10252 {
10253 ent->is_indirect = TRUE;
10254 ent->got.ent = first_tlsld;
10255 }
10256 else
10257 {
10258 if (first_tlsld == NULL)
10259 first_tlsld = ent;
10260 s = ppc64_elf_tdata (ibfd)->got;
10261 ent->got.offset = s->size;
10262 ent->owner = ibfd;
10263 s->size += 16;
10264 if (bfd_link_pic (info))
10265 {
10266 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10267 srel->size += sizeof (Elf64_External_Rela);
10268 }
10269 }
10270 }
10271 else
10272 ent->got.offset = (bfd_vma) -1;
10273 }
10274
10275 /* We now have determined the sizes of the various dynamic sections.
10276 Allocate memory for them. */
10277 relocs = FALSE;
10278 for (s = dynobj->sections; s != NULL; s = s->next)
10279 {
10280 if ((s->flags & SEC_LINKER_CREATED) == 0)
10281 continue;
10282
10283 if (s == htab->brlt || s == htab->relbrlt)
10284 /* These haven't been allocated yet; don't strip. */
10285 continue;
10286 else if (s == htab->elf.sgot
10287 || s == htab->elf.splt
10288 || s == htab->elf.iplt
10289 || s == htab->glink
10290 || s == htab->elf.sdynbss
10291 || s == htab->elf.sdynrelro)
10292 {
10293 /* Strip this section if we don't need it; see the
10294 comment below. */
10295 }
10296 else if (s == htab->glink_eh_frame)
10297 {
10298 if (!bfd_is_abs_section (s->output_section))
10299 /* Not sized yet. */
10300 continue;
10301 }
10302 else if (CONST_STRNEQ (s->name, ".rela"))
10303 {
10304 if (s->size != 0)
10305 {
10306 if (s != htab->elf.srelplt)
10307 relocs = TRUE;
10308
10309 /* We use the reloc_count field as a counter if we need
10310 to copy relocs into the output file. */
10311 s->reloc_count = 0;
10312 }
10313 }
10314 else
10315 {
10316 /* It's not one of our sections, so don't allocate space. */
10317 continue;
10318 }
10319
10320 if (s->size == 0)
10321 {
10322 /* If we don't need this section, strip it from the
10323 output file. This is mostly to handle .rela.bss and
10324 .rela.plt. We must create both sections in
10325 create_dynamic_sections, because they must be created
10326 before the linker maps input sections to output
10327 sections. The linker does that before
10328 adjust_dynamic_symbol is called, and it is that
10329 function which decides whether anything needs to go
10330 into these sections. */
10331 s->flags |= SEC_EXCLUDE;
10332 continue;
10333 }
10334
10335 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10336 continue;
10337
10338 /* Allocate memory for the section contents. We use bfd_zalloc
10339 here in case unused entries are not reclaimed before the
10340 section's contents are written out. This should not happen,
10341 but this way if it does we get a R_PPC64_NONE reloc in .rela
10342 sections instead of garbage.
10343 We also rely on the section contents being zero when writing
10344 the GOT and .dynrelro. */
10345 s->contents = bfd_zalloc (dynobj, s->size);
10346 if (s->contents == NULL)
10347 return FALSE;
10348 }
10349
10350 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10351 {
10352 if (!is_ppc64_elf (ibfd))
10353 continue;
10354
10355 s = ppc64_elf_tdata (ibfd)->got;
10356 if (s != NULL && s != htab->elf.sgot)
10357 {
10358 if (s->size == 0)
10359 s->flags |= SEC_EXCLUDE;
10360 else
10361 {
10362 s->contents = bfd_zalloc (ibfd, s->size);
10363 if (s->contents == NULL)
10364 return FALSE;
10365 }
10366 }
10367 s = ppc64_elf_tdata (ibfd)->relgot;
10368 if (s != NULL)
10369 {
10370 if (s->size == 0)
10371 s->flags |= SEC_EXCLUDE;
10372 else
10373 {
10374 s->contents = bfd_zalloc (ibfd, s->size);
10375 if (s->contents == NULL)
10376 return FALSE;
10377 relocs = TRUE;
10378 s->reloc_count = 0;
10379 }
10380 }
10381 }
10382
10383 if (htab->elf.dynamic_sections_created)
10384 {
10385 bfd_boolean tls_opt;
10386
10387 /* Add some entries to the .dynamic section. We fill in the
10388 values later, in ppc64_elf_finish_dynamic_sections, but we
10389 must add the entries now so that we get the correct size for
10390 the .dynamic section. The DT_DEBUG entry is filled in by the
10391 dynamic linker and used by the debugger. */
10392 #define add_dynamic_entry(TAG, VAL) \
10393 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10394
10395 if (bfd_link_executable (info))
10396 {
10397 if (!add_dynamic_entry (DT_DEBUG, 0))
10398 return FALSE;
10399 }
10400
10401 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10402 {
10403 if (!add_dynamic_entry (DT_PLTGOT, 0)
10404 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10405 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10406 || !add_dynamic_entry (DT_JMPREL, 0)
10407 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10408 return FALSE;
10409 }
10410
10411 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10412 {
10413 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10414 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10415 return FALSE;
10416 }
10417
10418 tls_opt = (htab->params->tls_get_addr_opt
10419 && htab->tls_get_addr_fd != NULL
10420 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10421 if (tls_opt || !htab->opd_abi)
10422 {
10423 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10424 return FALSE;
10425 }
10426
10427 if (relocs)
10428 {
10429 if (!add_dynamic_entry (DT_RELA, 0)
10430 || !add_dynamic_entry (DT_RELASZ, 0)
10431 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10432 return FALSE;
10433
10434 /* If any dynamic relocs apply to a read-only section,
10435 then we need a DT_TEXTREL entry. */
10436 if ((info->flags & DF_TEXTREL) == 0)
10437 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10438
10439 if ((info->flags & DF_TEXTREL) != 0)
10440 {
10441 if (!add_dynamic_entry (DT_TEXTREL, 0))
10442 return FALSE;
10443 }
10444 }
10445 }
10446 #undef add_dynamic_entry
10447
10448 return TRUE;
10449 }
10450
10451 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10452
10453 static bfd_boolean
10454 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10455 {
10456 if (h->plt.plist != NULL
10457 && !h->def_regular
10458 && !h->pointer_equality_needed)
10459 return FALSE;
10460
10461 return _bfd_elf_hash_symbol (h);
10462 }
10463
10464 /* Determine the type of stub needed, if any, for a call. */
10465
10466 static inline enum ppc_stub_type
10467 ppc_type_of_stub (asection *input_sec,
10468 const Elf_Internal_Rela *rel,
10469 struct ppc_link_hash_entry **hash,
10470 struct plt_entry **plt_ent,
10471 bfd_vma destination,
10472 unsigned long local_off)
10473 {
10474 struct ppc_link_hash_entry *h = *hash;
10475 bfd_vma location;
10476 bfd_vma branch_offset;
10477 bfd_vma max_branch_offset;
10478 enum elf_ppc64_reloc_type r_type;
10479
10480 if (h != NULL)
10481 {
10482 struct plt_entry *ent;
10483 struct ppc_link_hash_entry *fdh = h;
10484 if (h->oh != NULL
10485 && h->oh->is_func_descriptor)
10486 {
10487 fdh = ppc_follow_link (h->oh);
10488 *hash = fdh;
10489 }
10490
10491 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10492 if (ent->addend == rel->r_addend
10493 && ent->plt.offset != (bfd_vma) -1)
10494 {
10495 *plt_ent = ent;
10496 return ppc_stub_plt_call;
10497 }
10498
10499 /* Here, we know we don't have a plt entry. If we don't have a
10500 either a defined function descriptor or a defined entry symbol
10501 in a regular object file, then it is pointless trying to make
10502 any other type of stub. */
10503 if (!is_static_defined (&fdh->elf)
10504 && !is_static_defined (&h->elf))
10505 return ppc_stub_none;
10506 }
10507 else if (elf_local_got_ents (input_sec->owner) != NULL)
10508 {
10509 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10510 struct plt_entry **local_plt = (struct plt_entry **)
10511 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10512 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10513
10514 if (local_plt[r_symndx] != NULL)
10515 {
10516 struct plt_entry *ent;
10517
10518 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10519 if (ent->addend == rel->r_addend
10520 && ent->plt.offset != (bfd_vma) -1)
10521 {
10522 *plt_ent = ent;
10523 return ppc_stub_plt_call;
10524 }
10525 }
10526 }
10527
10528 /* Determine where the call point is. */
10529 location = (input_sec->output_offset
10530 + input_sec->output_section->vma
10531 + rel->r_offset);
10532
10533 branch_offset = destination - location;
10534 r_type = ELF64_R_TYPE (rel->r_info);
10535
10536 /* Determine if a long branch stub is needed. */
10537 max_branch_offset = 1 << 25;
10538 if (r_type != R_PPC64_REL24)
10539 max_branch_offset = 1 << 15;
10540
10541 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10542 /* We need a stub. Figure out whether a long_branch or plt_branch
10543 is needed later. */
10544 return ppc_stub_long_branch;
10545
10546 return ppc_stub_none;
10547 }
10548
10549 /* With power7 weakly ordered memory model, it is possible for ld.so
10550 to update a plt entry in one thread and have another thread see a
10551 stale zero toc entry. To avoid this we need some sort of acquire
10552 barrier in the call stub. One solution is to make the load of the
10553 toc word seem to appear to depend on the load of the function entry
10554 word. Another solution is to test for r2 being zero, and branch to
10555 the appropriate glink entry if so.
10556
10557 . fake dep barrier compare
10558 . ld 12,xxx(2) ld 12,xxx(2)
10559 . mtctr 12 mtctr 12
10560 . xor 11,12,12 ld 2,xxx+8(2)
10561 . add 2,2,11 cmpldi 2,0
10562 . ld 2,xxx+8(2) bnectr+
10563 . bctr b <glink_entry>
10564
10565 The solution involving the compare turns out to be faster, so
10566 that's what we use unless the branch won't reach. */
10567
10568 #define ALWAYS_USE_FAKE_DEP 0
10569 #define ALWAYS_EMIT_R2SAVE 0
10570
10571 #define PPC_LO(v) ((v) & 0xffff)
10572 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10573 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10574
10575 static inline unsigned int
10576 plt_stub_size (struct ppc_link_hash_table *htab,
10577 struct ppc_stub_hash_entry *stub_entry,
10578 bfd_vma off)
10579 {
10580 unsigned size = 12;
10581
10582 if (ALWAYS_EMIT_R2SAVE
10583 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10584 size += 4;
10585 if (PPC_HA (off) != 0)
10586 size += 4;
10587 if (htab->opd_abi)
10588 {
10589 size += 4;
10590 if (htab->params->plt_static_chain)
10591 size += 4;
10592 if (htab->params->plt_thread_safe
10593 && htab->elf.dynamic_sections_created
10594 && stub_entry->h != NULL
10595 && stub_entry->h->elf.dynindx != -1)
10596 size += 8;
10597 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10598 size += 4;
10599 }
10600 if (stub_entry->h != NULL
10601 && (stub_entry->h == htab->tls_get_addr_fd
10602 || stub_entry->h == htab->tls_get_addr)
10603 && htab->params->tls_get_addr_opt)
10604 {
10605 size += 7 * 4;
10606 if (ALWAYS_EMIT_R2SAVE
10607 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10608 size += 6 * 4;
10609 }
10610 return size;
10611 }
10612
10613 /* Depending on the sign of plt_stub_align:
10614 If positive, return the padding to align to a 2**plt_stub_align
10615 boundary.
10616 If negative, if this stub would cross fewer 2**plt_stub_align
10617 boundaries if we align, then return the padding needed to do so. */
10618
10619 static inline unsigned int
10620 plt_stub_pad (struct ppc_link_hash_table *htab,
10621 struct ppc_stub_hash_entry *stub_entry,
10622 bfd_vma plt_off)
10623 {
10624 int stub_align;
10625 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10626 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10627
10628 if (htab->params->plt_stub_align >= 0)
10629 {
10630 stub_align = 1 << htab->params->plt_stub_align;
10631 if ((stub_off & (stub_align - 1)) != 0)
10632 return stub_align - (stub_off & (stub_align - 1));
10633 return 0;
10634 }
10635
10636 stub_align = 1 << -htab->params->plt_stub_align;
10637 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10638 > ((stub_size - 1) & -stub_align))
10639 return stub_align - (stub_off & (stub_align - 1));
10640 return 0;
10641 }
10642
10643 /* Build a .plt call stub. */
10644
10645 static inline bfd_byte *
10646 build_plt_stub (struct ppc_link_hash_table *htab,
10647 struct ppc_stub_hash_entry *stub_entry,
10648 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10649 {
10650 bfd *obfd = htab->params->stub_bfd;
10651 bfd_boolean plt_load_toc = htab->opd_abi;
10652 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10653 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10654 && htab->elf.dynamic_sections_created
10655 && stub_entry->h != NULL
10656 && stub_entry->h->elf.dynindx != -1);
10657 bfd_boolean use_fake_dep = plt_thread_safe;
10658 bfd_vma cmp_branch_off = 0;
10659
10660 if (!ALWAYS_USE_FAKE_DEP
10661 && plt_load_toc
10662 && plt_thread_safe
10663 && !((stub_entry->h == htab->tls_get_addr_fd
10664 || stub_entry->h == htab->tls_get_addr)
10665 && htab->params->tls_get_addr_opt))
10666 {
10667 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10668 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10669 / PLT_ENTRY_SIZE (htab));
10670 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10671 bfd_vma to, from;
10672
10673 if (pltindex > 32768)
10674 glinkoff += (pltindex - 32768) * 4;
10675 to = (glinkoff
10676 + htab->glink->output_offset
10677 + htab->glink->output_section->vma);
10678 from = (p - stub_entry->group->stub_sec->contents
10679 + 4 * (ALWAYS_EMIT_R2SAVE
10680 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10681 + 4 * (PPC_HA (offset) != 0)
10682 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10683 != PPC_HA (offset))
10684 + 4 * (plt_static_chain != 0)
10685 + 20
10686 + stub_entry->group->stub_sec->output_offset
10687 + stub_entry->group->stub_sec->output_section->vma);
10688 cmp_branch_off = to - from;
10689 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10690 }
10691
10692 if (PPC_HA (offset) != 0)
10693 {
10694 if (r != NULL)
10695 {
10696 if (ALWAYS_EMIT_R2SAVE
10697 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10698 r[0].r_offset += 4;
10699 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10700 r[1].r_offset = r[0].r_offset + 4;
10701 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10702 r[1].r_addend = r[0].r_addend;
10703 if (plt_load_toc)
10704 {
10705 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10706 {
10707 r[2].r_offset = r[1].r_offset + 4;
10708 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10709 r[2].r_addend = r[0].r_addend;
10710 }
10711 else
10712 {
10713 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10714 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10715 r[2].r_addend = r[0].r_addend + 8;
10716 if (plt_static_chain)
10717 {
10718 r[3].r_offset = r[2].r_offset + 4;
10719 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10720 r[3].r_addend = r[0].r_addend + 16;
10721 }
10722 }
10723 }
10724 }
10725 if (ALWAYS_EMIT_R2SAVE
10726 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10727 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10728 if (plt_load_toc)
10729 {
10730 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10731 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10732 }
10733 else
10734 {
10735 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10736 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10737 }
10738 if (plt_load_toc
10739 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10740 {
10741 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10742 offset = 0;
10743 }
10744 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10745 if (plt_load_toc)
10746 {
10747 if (use_fake_dep)
10748 {
10749 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10750 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10751 }
10752 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10753 if (plt_static_chain)
10754 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10755 }
10756 }
10757 else
10758 {
10759 if (r != NULL)
10760 {
10761 if (ALWAYS_EMIT_R2SAVE
10762 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10763 r[0].r_offset += 4;
10764 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10765 if (plt_load_toc)
10766 {
10767 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10768 {
10769 r[1].r_offset = r[0].r_offset + 4;
10770 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10771 r[1].r_addend = r[0].r_addend;
10772 }
10773 else
10774 {
10775 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10776 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10777 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10778 if (plt_static_chain)
10779 {
10780 r[2].r_offset = r[1].r_offset + 4;
10781 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10782 r[2].r_addend = r[0].r_addend + 8;
10783 }
10784 }
10785 }
10786 }
10787 if (ALWAYS_EMIT_R2SAVE
10788 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10789 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10790 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10791 if (plt_load_toc
10792 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10793 {
10794 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10795 offset = 0;
10796 }
10797 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10798 if (plt_load_toc)
10799 {
10800 if (use_fake_dep)
10801 {
10802 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10803 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10804 }
10805 if (plt_static_chain)
10806 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10807 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10808 }
10809 }
10810 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10811 {
10812 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10813 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10814 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10815 }
10816 else
10817 bfd_put_32 (obfd, BCTR, p), p += 4;
10818 return p;
10819 }
10820
10821 /* Build a special .plt call stub for __tls_get_addr. */
10822
10823 #define LD_R11_0R3 0xe9630000
10824 #define LD_R12_0R3 0xe9830000
10825 #define MR_R0_R3 0x7c601b78
10826 #define CMPDI_R11_0 0x2c2b0000
10827 #define ADD_R3_R12_R13 0x7c6c6a14
10828 #define BEQLR 0x4d820020
10829 #define MR_R3_R0 0x7c030378
10830 #define STD_R11_0R1 0xf9610000
10831 #define BCTRL 0x4e800421
10832 #define LD_R11_0R1 0xe9610000
10833 #define MTLR_R11 0x7d6803a6
10834
10835 static inline bfd_byte *
10836 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10837 struct ppc_stub_hash_entry *stub_entry,
10838 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10839 {
10840 bfd *obfd = htab->params->stub_bfd;
10841
10842 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10843 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10844 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10845 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10846 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10847 bfd_put_32 (obfd, BEQLR, p), p += 4;
10848 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10849 if (r != NULL)
10850 r[0].r_offset += 7 * 4;
10851 if (!ALWAYS_EMIT_R2SAVE
10852 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10853 return build_plt_stub (htab, stub_entry, p, offset, r);
10854
10855 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10856 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10857
10858 if (r != NULL)
10859 r[0].r_offset += 2 * 4;
10860 p = build_plt_stub (htab, stub_entry, p, offset, r);
10861 bfd_put_32 (obfd, BCTRL, p - 4);
10862
10863 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10864 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10865 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10866 bfd_put_32 (obfd, BLR, p), p += 4;
10867
10868 return p;
10869 }
10870
10871 static Elf_Internal_Rela *
10872 get_relocs (asection *sec, int count)
10873 {
10874 Elf_Internal_Rela *relocs;
10875 struct bfd_elf_section_data *elfsec_data;
10876
10877 elfsec_data = elf_section_data (sec);
10878 relocs = elfsec_data->relocs;
10879 if (relocs == NULL)
10880 {
10881 bfd_size_type relsize;
10882 relsize = sec->reloc_count * sizeof (*relocs);
10883 relocs = bfd_alloc (sec->owner, relsize);
10884 if (relocs == NULL)
10885 return NULL;
10886 elfsec_data->relocs = relocs;
10887 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10888 sizeof (Elf_Internal_Shdr));
10889 if (elfsec_data->rela.hdr == NULL)
10890 return NULL;
10891 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10892 * sizeof (Elf64_External_Rela));
10893 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10894 sec->reloc_count = 0;
10895 }
10896 relocs += sec->reloc_count;
10897 sec->reloc_count += count;
10898 return relocs;
10899 }
10900
10901 static bfd_vma
10902 get_r2off (struct bfd_link_info *info,
10903 struct ppc_stub_hash_entry *stub_entry)
10904 {
10905 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10906 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10907
10908 if (r2off == 0)
10909 {
10910 /* Support linking -R objects. Get the toc pointer from the
10911 opd entry. */
10912 char buf[8];
10913 if (!htab->opd_abi)
10914 return r2off;
10915 asection *opd = stub_entry->h->elf.root.u.def.section;
10916 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10917
10918 if (strcmp (opd->name, ".opd") != 0
10919 || opd->reloc_count != 0)
10920 {
10921 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10922 stub_entry->h->elf.root.root.string);
10923 bfd_set_error (bfd_error_bad_value);
10924 return (bfd_vma) -1;
10925 }
10926 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10927 return (bfd_vma) -1;
10928 r2off = bfd_get_64 (opd->owner, buf);
10929 r2off -= elf_gp (info->output_bfd);
10930 }
10931 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10932 return r2off;
10933 }
10934
10935 static bfd_boolean
10936 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10937 {
10938 struct ppc_stub_hash_entry *stub_entry;
10939 struct ppc_branch_hash_entry *br_entry;
10940 struct bfd_link_info *info;
10941 struct ppc_link_hash_table *htab;
10942 bfd_byte *loc;
10943 bfd_byte *p;
10944 bfd_vma dest, off;
10945 int size;
10946 Elf_Internal_Rela *r;
10947 asection *plt;
10948
10949 /* Massage our args to the form they really have. */
10950 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10951 info = in_arg;
10952
10953 htab = ppc_hash_table (info);
10954 if (htab == NULL)
10955 return FALSE;
10956
10957 /* Make a note of the offset within the stubs for this entry. */
10958 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10959 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10960
10961 htab->stub_count[stub_entry->stub_type - 1] += 1;
10962 switch (stub_entry->stub_type)
10963 {
10964 case ppc_stub_long_branch:
10965 case ppc_stub_long_branch_r2off:
10966 /* Branches are relative. This is where we are going to. */
10967 dest = (stub_entry->target_value
10968 + stub_entry->target_section->output_offset
10969 + stub_entry->target_section->output_section->vma);
10970 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10971 off = dest;
10972
10973 /* And this is where we are coming from. */
10974 off -= (stub_entry->stub_offset
10975 + stub_entry->group->stub_sec->output_offset
10976 + stub_entry->group->stub_sec->output_section->vma);
10977
10978 size = 4;
10979 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10980 {
10981 bfd_vma r2off = get_r2off (info, stub_entry);
10982
10983 if (r2off == (bfd_vma) -1)
10984 {
10985 htab->stub_error = TRUE;
10986 return FALSE;
10987 }
10988 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10989 loc += 4;
10990 size = 8;
10991 if (PPC_HA (r2off) != 0)
10992 {
10993 bfd_put_32 (htab->params->stub_bfd,
10994 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10995 loc += 4;
10996 size += 4;
10997 }
10998 if (PPC_LO (r2off) != 0)
10999 {
11000 bfd_put_32 (htab->params->stub_bfd,
11001 ADDI_R2_R2 | PPC_LO (r2off), loc);
11002 loc += 4;
11003 size += 4;
11004 }
11005 off -= size - 4;
11006 }
11007 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
11008
11009 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
11010 {
11011 info->callbacks->einfo
11012 (_("%P: long branch stub `%s' offset overflow\n"),
11013 stub_entry->root.string);
11014 htab->stub_error = TRUE;
11015 return FALSE;
11016 }
11017
11018 if (info->emitrelocations)
11019 {
11020 r = get_relocs (stub_entry->group->stub_sec, 1);
11021 if (r == NULL)
11022 return FALSE;
11023 r->r_offset = loc - stub_entry->group->stub_sec->contents;
11024 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
11025 r->r_addend = dest;
11026 if (stub_entry->h != NULL)
11027 {
11028 struct elf_link_hash_entry **hashes;
11029 unsigned long symndx;
11030 struct ppc_link_hash_entry *h;
11031
11032 hashes = elf_sym_hashes (htab->params->stub_bfd);
11033 if (hashes == NULL)
11034 {
11035 bfd_size_type hsize;
11036
11037 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
11038 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
11039 if (hashes == NULL)
11040 return FALSE;
11041 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11042 htab->stub_globals = 1;
11043 }
11044 symndx = htab->stub_globals++;
11045 h = stub_entry->h;
11046 hashes[symndx] = &h->elf;
11047 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11048 if (h->oh != NULL && h->oh->is_func)
11049 h = ppc_follow_link (h->oh);
11050 if (h->elf.root.u.def.section != stub_entry->target_section)
11051 /* H is an opd symbol. The addend must be zero. */
11052 r->r_addend = 0;
11053 else
11054 {
11055 off = (h->elf.root.u.def.value
11056 + h->elf.root.u.def.section->output_offset
11057 + h->elf.root.u.def.section->output_section->vma);
11058 r->r_addend -= off;
11059 }
11060 }
11061 }
11062 break;
11063
11064 case ppc_stub_plt_branch:
11065 case ppc_stub_plt_branch_r2off:
11066 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11067 stub_entry->root.string + 9,
11068 FALSE, FALSE);
11069 if (br_entry == NULL)
11070 {
11071 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
11072 stub_entry->root.string);
11073 htab->stub_error = TRUE;
11074 return FALSE;
11075 }
11076
11077 dest = (stub_entry->target_value
11078 + stub_entry->target_section->output_offset
11079 + stub_entry->target_section->output_section->vma);
11080 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11081 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11082
11083 bfd_put_64 (htab->brlt->owner, dest,
11084 htab->brlt->contents + br_entry->offset);
11085
11086 if (br_entry->iter == htab->stub_iteration)
11087 {
11088 br_entry->iter = 0;
11089
11090 if (htab->relbrlt != NULL)
11091 {
11092 /* Create a reloc for the branch lookup table entry. */
11093 Elf_Internal_Rela rela;
11094 bfd_byte *rl;
11095
11096 rela.r_offset = (br_entry->offset
11097 + htab->brlt->output_offset
11098 + htab->brlt->output_section->vma);
11099 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11100 rela.r_addend = dest;
11101
11102 rl = htab->relbrlt->contents;
11103 rl += (htab->relbrlt->reloc_count++
11104 * sizeof (Elf64_External_Rela));
11105 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11106 }
11107 else if (info->emitrelocations)
11108 {
11109 r = get_relocs (htab->brlt, 1);
11110 if (r == NULL)
11111 return FALSE;
11112 /* brlt, being SEC_LINKER_CREATED does not go through the
11113 normal reloc processing. Symbols and offsets are not
11114 translated from input file to output file form, so
11115 set up the offset per the output file. */
11116 r->r_offset = (br_entry->offset
11117 + htab->brlt->output_offset
11118 + htab->brlt->output_section->vma);
11119 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11120 r->r_addend = dest;
11121 }
11122 }
11123
11124 dest = (br_entry->offset
11125 + htab->brlt->output_offset
11126 + htab->brlt->output_section->vma);
11127
11128 off = (dest
11129 - elf_gp (htab->brlt->output_section->owner)
11130 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11131
11132 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11133 {
11134 info->callbacks->einfo
11135 (_("%P: linkage table error against `%T'\n"),
11136 stub_entry->root.string);
11137 bfd_set_error (bfd_error_bad_value);
11138 htab->stub_error = TRUE;
11139 return FALSE;
11140 }
11141
11142 if (info->emitrelocations)
11143 {
11144 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11145 if (r == NULL)
11146 return FALSE;
11147 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11148 if (bfd_big_endian (info->output_bfd))
11149 r[0].r_offset += 2;
11150 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11151 r[0].r_offset += 4;
11152 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11153 r[0].r_addend = dest;
11154 if (PPC_HA (off) != 0)
11155 {
11156 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11157 r[1].r_offset = r[0].r_offset + 4;
11158 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11159 r[1].r_addend = r[0].r_addend;
11160 }
11161 }
11162
11163 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11164 {
11165 if (PPC_HA (off) != 0)
11166 {
11167 size = 16;
11168 bfd_put_32 (htab->params->stub_bfd,
11169 ADDIS_R12_R2 | PPC_HA (off), loc);
11170 loc += 4;
11171 bfd_put_32 (htab->params->stub_bfd,
11172 LD_R12_0R12 | PPC_LO (off), loc);
11173 }
11174 else
11175 {
11176 size = 12;
11177 bfd_put_32 (htab->params->stub_bfd,
11178 LD_R12_0R2 | PPC_LO (off), loc);
11179 }
11180 }
11181 else
11182 {
11183 bfd_vma r2off = get_r2off (info, stub_entry);
11184
11185 if (r2off == (bfd_vma) -1)
11186 {
11187 htab->stub_error = TRUE;
11188 return FALSE;
11189 }
11190
11191 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11192 loc += 4;
11193 size = 16;
11194 if (PPC_HA (off) != 0)
11195 {
11196 size += 4;
11197 bfd_put_32 (htab->params->stub_bfd,
11198 ADDIS_R12_R2 | PPC_HA (off), loc);
11199 loc += 4;
11200 bfd_put_32 (htab->params->stub_bfd,
11201 LD_R12_0R12 | PPC_LO (off), loc);
11202 }
11203 else
11204 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11205
11206 if (PPC_HA (r2off) != 0)
11207 {
11208 size += 4;
11209 loc += 4;
11210 bfd_put_32 (htab->params->stub_bfd,
11211 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11212 }
11213 if (PPC_LO (r2off) != 0)
11214 {
11215 size += 4;
11216 loc += 4;
11217 bfd_put_32 (htab->params->stub_bfd,
11218 ADDI_R2_R2 | PPC_LO (r2off), loc);
11219 }
11220 }
11221 loc += 4;
11222 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11223 loc += 4;
11224 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11225 break;
11226
11227 case ppc_stub_plt_call:
11228 case ppc_stub_plt_call_r2save:
11229 if (stub_entry->h != NULL
11230 && stub_entry->h->is_func_descriptor
11231 && stub_entry->h->oh != NULL)
11232 {
11233 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11234
11235 /* If the old-ABI "dot-symbol" is undefined make it weak so
11236 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11237 if (fh->elf.root.type == bfd_link_hash_undefined
11238 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11239 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11240 fh->elf.root.type = bfd_link_hash_undefweak;
11241 }
11242
11243 /* Now build the stub. */
11244 dest = stub_entry->plt_ent->plt.offset & ~1;
11245 if (dest >= (bfd_vma) -2)
11246 abort ();
11247
11248 plt = htab->elf.splt;
11249 if (!htab->elf.dynamic_sections_created
11250 || stub_entry->h == NULL
11251 || stub_entry->h->elf.dynindx == -1)
11252 plt = htab->elf.iplt;
11253
11254 dest += plt->output_offset + plt->output_section->vma;
11255
11256 if (stub_entry->h == NULL
11257 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11258 {
11259 Elf_Internal_Rela rela;
11260 bfd_byte *rl;
11261
11262 rela.r_offset = dest;
11263 if (htab->opd_abi)
11264 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11265 else
11266 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11267 rela.r_addend = (stub_entry->target_value
11268 + stub_entry->target_section->output_offset
11269 + stub_entry->target_section->output_section->vma);
11270
11271 rl = (htab->elf.irelplt->contents
11272 + (htab->elf.irelplt->reloc_count++
11273 * sizeof (Elf64_External_Rela)));
11274 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11275 stub_entry->plt_ent->plt.offset |= 1;
11276 htab->local_ifunc_resolver = 1;
11277 }
11278
11279 off = (dest
11280 - elf_gp (plt->output_section->owner)
11281 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11282
11283 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11284 {
11285 info->callbacks->einfo
11286 /* xgettext:c-format */
11287 (_("%P: linkage table error against `%T'\n"),
11288 stub_entry->h != NULL
11289 ? stub_entry->h->elf.root.root.string
11290 : "<local sym>");
11291 bfd_set_error (bfd_error_bad_value);
11292 htab->stub_error = TRUE;
11293 return FALSE;
11294 }
11295
11296 if (htab->params->plt_stub_align != 0)
11297 {
11298 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11299
11300 stub_entry->group->stub_sec->size += pad;
11301 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11302 loc += pad;
11303 }
11304
11305 r = NULL;
11306 if (info->emitrelocations)
11307 {
11308 r = get_relocs (stub_entry->group->stub_sec,
11309 ((PPC_HA (off) != 0)
11310 + (htab->opd_abi
11311 ? 2 + (htab->params->plt_static_chain
11312 && PPC_HA (off + 16) == PPC_HA (off))
11313 : 1)));
11314 if (r == NULL)
11315 return FALSE;
11316 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11317 if (bfd_big_endian (info->output_bfd))
11318 r[0].r_offset += 2;
11319 r[0].r_addend = dest;
11320 }
11321 if (stub_entry->h != NULL
11322 && (stub_entry->h == htab->tls_get_addr_fd
11323 || stub_entry->h == htab->tls_get_addr)
11324 && htab->params->tls_get_addr_opt)
11325 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11326 else
11327 p = build_plt_stub (htab, stub_entry, loc, off, r);
11328 size = p - loc;
11329 break;
11330
11331 case ppc_stub_save_res:
11332 return TRUE;
11333
11334 default:
11335 BFD_FAIL ();
11336 return FALSE;
11337 }
11338
11339 stub_entry->group->stub_sec->size += size;
11340
11341 if (htab->params->emit_stub_syms)
11342 {
11343 struct elf_link_hash_entry *h;
11344 size_t len1, len2;
11345 char *name;
11346 const char *const stub_str[] = { "long_branch",
11347 "long_branch_r2off",
11348 "plt_branch",
11349 "plt_branch_r2off",
11350 "plt_call",
11351 "plt_call" };
11352
11353 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11354 len2 = strlen (stub_entry->root.string);
11355 name = bfd_malloc (len1 + len2 + 2);
11356 if (name == NULL)
11357 return FALSE;
11358 memcpy (name, stub_entry->root.string, 9);
11359 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11360 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11361 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11362 if (h == NULL)
11363 return FALSE;
11364 if (h->root.type == bfd_link_hash_new)
11365 {
11366 h->root.type = bfd_link_hash_defined;
11367 h->root.u.def.section = stub_entry->group->stub_sec;
11368 h->root.u.def.value = stub_entry->stub_offset;
11369 h->ref_regular = 1;
11370 h->def_regular = 1;
11371 h->ref_regular_nonweak = 1;
11372 h->forced_local = 1;
11373 h->non_elf = 0;
11374 h->root.linker_def = 1;
11375 }
11376 }
11377
11378 return TRUE;
11379 }
11380
11381 /* As above, but don't actually build the stub. Just bump offset so
11382 we know stub section sizes, and select plt_branch stubs where
11383 long_branch stubs won't do. */
11384
11385 static bfd_boolean
11386 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11387 {
11388 struct ppc_stub_hash_entry *stub_entry;
11389 struct bfd_link_info *info;
11390 struct ppc_link_hash_table *htab;
11391 bfd_vma off;
11392 int size;
11393
11394 /* Massage our args to the form they really have. */
11395 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11396 info = in_arg;
11397
11398 htab = ppc_hash_table (info);
11399 if (htab == NULL)
11400 return FALSE;
11401
11402 if (stub_entry->h != NULL
11403 && stub_entry->h->save_res
11404 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11405 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11406 {
11407 /* Don't make stubs to out-of-line register save/restore
11408 functions. Instead, emit copies of the functions. */
11409 stub_entry->group->needs_save_res = 1;
11410 stub_entry->stub_type = ppc_stub_save_res;
11411 return TRUE;
11412 }
11413
11414 if (stub_entry->stub_type == ppc_stub_plt_call
11415 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11416 {
11417 asection *plt;
11418 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11419 if (off >= (bfd_vma) -2)
11420 abort ();
11421 plt = htab->elf.splt;
11422 if (!htab->elf.dynamic_sections_created
11423 || stub_entry->h == NULL
11424 || stub_entry->h->elf.dynindx == -1)
11425 plt = htab->elf.iplt;
11426 off += (plt->output_offset
11427 + plt->output_section->vma
11428 - elf_gp (plt->output_section->owner)
11429 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11430
11431 size = plt_stub_size (htab, stub_entry, off);
11432 if (stub_entry->h != NULL
11433 && (stub_entry->h == htab->tls_get_addr_fd
11434 || stub_entry->h == htab->tls_get_addr)
11435 && htab->params->tls_get_addr_opt
11436 && (ALWAYS_EMIT_R2SAVE
11437 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11438 stub_entry->group->tls_get_addr_opt_bctrl
11439 = stub_entry->group->stub_sec->size + size - 5 * 4;
11440
11441 if (htab->params->plt_stub_align)
11442 size += plt_stub_pad (htab, stub_entry, off);
11443 if (info->emitrelocations)
11444 {
11445 stub_entry->group->stub_sec->reloc_count
11446 += ((PPC_HA (off) != 0)
11447 + (htab->opd_abi
11448 ? 2 + (htab->params->plt_static_chain
11449 && PPC_HA (off + 16) == PPC_HA (off))
11450 : 1));
11451 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11452 }
11453 }
11454 else
11455 {
11456 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11457 variants. */
11458 bfd_vma r2off = 0;
11459 bfd_vma local_off = 0;
11460
11461 off = (stub_entry->target_value
11462 + stub_entry->target_section->output_offset
11463 + stub_entry->target_section->output_section->vma);
11464 off -= (stub_entry->group->stub_sec->size
11465 + stub_entry->group->stub_sec->output_offset
11466 + stub_entry->group->stub_sec->output_section->vma);
11467
11468 /* Reset the stub type from the plt variant in case we now
11469 can reach with a shorter stub. */
11470 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11471 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11472
11473 size = 4;
11474 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11475 {
11476 r2off = get_r2off (info, stub_entry);
11477 if (r2off == (bfd_vma) -1)
11478 {
11479 htab->stub_error = TRUE;
11480 return FALSE;
11481 }
11482 size = 8;
11483 if (PPC_HA (r2off) != 0)
11484 size += 4;
11485 if (PPC_LO (r2off) != 0)
11486 size += 4;
11487 off -= size - 4;
11488 }
11489
11490 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11491
11492 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11493 Do the same for -R objects without function descriptors. */
11494 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11495 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11496 && r2off == 0
11497 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11498 {
11499 struct ppc_branch_hash_entry *br_entry;
11500
11501 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11502 stub_entry->root.string + 9,
11503 TRUE, FALSE);
11504 if (br_entry == NULL)
11505 {
11506 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11507 stub_entry->root.string);
11508 htab->stub_error = TRUE;
11509 return FALSE;
11510 }
11511
11512 if (br_entry->iter != htab->stub_iteration)
11513 {
11514 br_entry->iter = htab->stub_iteration;
11515 br_entry->offset = htab->brlt->size;
11516 htab->brlt->size += 8;
11517
11518 if (htab->relbrlt != NULL)
11519 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11520 else if (info->emitrelocations)
11521 {
11522 htab->brlt->reloc_count += 1;
11523 htab->brlt->flags |= SEC_RELOC;
11524 }
11525 }
11526
11527 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11528 off = (br_entry->offset
11529 + htab->brlt->output_offset
11530 + htab->brlt->output_section->vma
11531 - elf_gp (htab->brlt->output_section->owner)
11532 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11533
11534 if (info->emitrelocations)
11535 {
11536 stub_entry->group->stub_sec->reloc_count
11537 += 1 + (PPC_HA (off) != 0);
11538 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11539 }
11540
11541 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11542 {
11543 size = 12;
11544 if (PPC_HA (off) != 0)
11545 size = 16;
11546 }
11547 else
11548 {
11549 size = 16;
11550 if (PPC_HA (off) != 0)
11551 size += 4;
11552
11553 if (PPC_HA (r2off) != 0)
11554 size += 4;
11555 if (PPC_LO (r2off) != 0)
11556 size += 4;
11557 }
11558 }
11559 else if (info->emitrelocations)
11560 {
11561 stub_entry->group->stub_sec->reloc_count += 1;
11562 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11563 }
11564 }
11565
11566 stub_entry->group->stub_sec->size += size;
11567 return TRUE;
11568 }
11569
11570 /* Set up various things so that we can make a list of input sections
11571 for each output section included in the link. Returns -1 on error,
11572 0 when no stubs will be needed, and 1 on success. */
11573
11574 int
11575 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11576 {
11577 unsigned int id;
11578 bfd_size_type amt;
11579 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11580
11581 if (htab == NULL)
11582 return -1;
11583
11584 htab->sec_info_arr_size = bfd_get_next_section_id ();
11585 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11586 htab->sec_info = bfd_zmalloc (amt);
11587 if (htab->sec_info == NULL)
11588 return -1;
11589
11590 /* Set toc_off for com, und, abs and ind sections. */
11591 for (id = 0; id < 3; id++)
11592 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11593
11594 return 1;
11595 }
11596
11597 /* Set up for first pass at multitoc partitioning. */
11598
11599 void
11600 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11601 {
11602 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11603
11604 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11605 htab->toc_bfd = NULL;
11606 htab->toc_first_sec = NULL;
11607 }
11608
11609 /* The linker repeatedly calls this function for each TOC input section
11610 and linker generated GOT section. Group input bfds such that the toc
11611 within a group is less than 64k in size. */
11612
11613 bfd_boolean
11614 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11615 {
11616 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11617 bfd_vma addr, off, limit;
11618
11619 if (htab == NULL)
11620 return FALSE;
11621
11622 if (!htab->second_toc_pass)
11623 {
11624 /* Keep track of the first .toc or .got section for this input bfd. */
11625 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11626
11627 if (new_bfd)
11628 {
11629 htab->toc_bfd = isec->owner;
11630 htab->toc_first_sec = isec;
11631 }
11632
11633 addr = isec->output_offset + isec->output_section->vma;
11634 off = addr - htab->toc_curr;
11635 limit = 0x80008000;
11636 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11637 limit = 0x10000;
11638 if (off + isec->size > limit)
11639 {
11640 addr = (htab->toc_first_sec->output_offset
11641 + htab->toc_first_sec->output_section->vma);
11642 htab->toc_curr = addr;
11643 htab->toc_curr &= -TOC_BASE_ALIGN;
11644 }
11645
11646 /* toc_curr is the base address of this toc group. Set elf_gp
11647 for the input section to be the offset relative to the
11648 output toc base plus 0x8000. Making the input elf_gp an
11649 offset allows us to move the toc as a whole without
11650 recalculating input elf_gp. */
11651 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11652 off += TOC_BASE_OFF;
11653
11654 /* Die if someone uses a linker script that doesn't keep input
11655 file .toc and .got together. */
11656 if (new_bfd
11657 && elf_gp (isec->owner) != 0
11658 && elf_gp (isec->owner) != off)
11659 return FALSE;
11660
11661 elf_gp (isec->owner) = off;
11662 return TRUE;
11663 }
11664
11665 /* During the second pass toc_first_sec points to the start of
11666 a toc group, and toc_curr is used to track the old elf_gp.
11667 We use toc_bfd to ensure we only look at each bfd once. */
11668 if (htab->toc_bfd == isec->owner)
11669 return TRUE;
11670 htab->toc_bfd = isec->owner;
11671
11672 if (htab->toc_first_sec == NULL
11673 || htab->toc_curr != elf_gp (isec->owner))
11674 {
11675 htab->toc_curr = elf_gp (isec->owner);
11676 htab->toc_first_sec = isec;
11677 }
11678 addr = (htab->toc_first_sec->output_offset
11679 + htab->toc_first_sec->output_section->vma);
11680 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11681 elf_gp (isec->owner) = off;
11682
11683 return TRUE;
11684 }
11685
11686 /* Called via elf_link_hash_traverse to merge GOT entries for global
11687 symbol H. */
11688
11689 static bfd_boolean
11690 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11691 {
11692 if (h->root.type == bfd_link_hash_indirect)
11693 return TRUE;
11694
11695 merge_got_entries (&h->got.glist);
11696
11697 return TRUE;
11698 }
11699
11700 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11701 symbol H. */
11702
11703 static bfd_boolean
11704 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11705 {
11706 struct got_entry *gent;
11707
11708 if (h->root.type == bfd_link_hash_indirect)
11709 return TRUE;
11710
11711 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11712 if (!gent->is_indirect)
11713 allocate_got (h, (struct bfd_link_info *) inf, gent);
11714 return TRUE;
11715 }
11716
11717 /* Called on the first multitoc pass after the last call to
11718 ppc64_elf_next_toc_section. This function removes duplicate GOT
11719 entries. */
11720
11721 bfd_boolean
11722 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11723 {
11724 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11725 struct bfd *ibfd, *ibfd2;
11726 bfd_boolean done_something;
11727
11728 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11729
11730 if (!htab->do_multi_toc)
11731 return FALSE;
11732
11733 /* Merge global sym got entries within a toc group. */
11734 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11735
11736 /* And tlsld_got. */
11737 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11738 {
11739 struct got_entry *ent, *ent2;
11740
11741 if (!is_ppc64_elf (ibfd))
11742 continue;
11743
11744 ent = ppc64_tlsld_got (ibfd);
11745 if (!ent->is_indirect
11746 && ent->got.offset != (bfd_vma) -1)
11747 {
11748 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11749 {
11750 if (!is_ppc64_elf (ibfd2))
11751 continue;
11752
11753 ent2 = ppc64_tlsld_got (ibfd2);
11754 if (!ent2->is_indirect
11755 && ent2->got.offset != (bfd_vma) -1
11756 && elf_gp (ibfd2) == elf_gp (ibfd))
11757 {
11758 ent2->is_indirect = TRUE;
11759 ent2->got.ent = ent;
11760 }
11761 }
11762 }
11763 }
11764
11765 /* Zap sizes of got sections. */
11766 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11767 htab->elf.irelplt->size -= htab->got_reli_size;
11768 htab->got_reli_size = 0;
11769
11770 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11771 {
11772 asection *got, *relgot;
11773
11774 if (!is_ppc64_elf (ibfd))
11775 continue;
11776
11777 got = ppc64_elf_tdata (ibfd)->got;
11778 if (got != NULL)
11779 {
11780 got->rawsize = got->size;
11781 got->size = 0;
11782 relgot = ppc64_elf_tdata (ibfd)->relgot;
11783 relgot->rawsize = relgot->size;
11784 relgot->size = 0;
11785 }
11786 }
11787
11788 /* Now reallocate the got, local syms first. We don't need to
11789 allocate section contents again since we never increase size. */
11790 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11791 {
11792 struct got_entry **lgot_ents;
11793 struct got_entry **end_lgot_ents;
11794 struct plt_entry **local_plt;
11795 struct plt_entry **end_local_plt;
11796 unsigned char *lgot_masks;
11797 bfd_size_type locsymcount;
11798 Elf_Internal_Shdr *symtab_hdr;
11799 asection *s;
11800
11801 if (!is_ppc64_elf (ibfd))
11802 continue;
11803
11804 lgot_ents = elf_local_got_ents (ibfd);
11805 if (!lgot_ents)
11806 continue;
11807
11808 symtab_hdr = &elf_symtab_hdr (ibfd);
11809 locsymcount = symtab_hdr->sh_info;
11810 end_lgot_ents = lgot_ents + locsymcount;
11811 local_plt = (struct plt_entry **) end_lgot_ents;
11812 end_local_plt = local_plt + locsymcount;
11813 lgot_masks = (unsigned char *) end_local_plt;
11814 s = ppc64_elf_tdata (ibfd)->got;
11815 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11816 {
11817 struct got_entry *ent;
11818
11819 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11820 {
11821 unsigned int ent_size = 8;
11822 unsigned int rel_size = sizeof (Elf64_External_Rela);
11823
11824 ent->got.offset = s->size;
11825 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11826 {
11827 ent_size *= 2;
11828 rel_size *= 2;
11829 }
11830 s->size += ent_size;
11831 if ((*lgot_masks & PLT_IFUNC) != 0)
11832 {
11833 htab->elf.irelplt->size += rel_size;
11834 htab->got_reli_size += rel_size;
11835 }
11836 else if (bfd_link_pic (info))
11837 {
11838 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11839 srel->size += rel_size;
11840 }
11841 }
11842 }
11843 }
11844
11845 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11846
11847 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11848 {
11849 struct got_entry *ent;
11850
11851 if (!is_ppc64_elf (ibfd))
11852 continue;
11853
11854 ent = ppc64_tlsld_got (ibfd);
11855 if (!ent->is_indirect
11856 && ent->got.offset != (bfd_vma) -1)
11857 {
11858 asection *s = ppc64_elf_tdata (ibfd)->got;
11859 ent->got.offset = s->size;
11860 s->size += 16;
11861 if (bfd_link_pic (info))
11862 {
11863 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11864 srel->size += sizeof (Elf64_External_Rela);
11865 }
11866 }
11867 }
11868
11869 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11870 if (!done_something)
11871 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11872 {
11873 asection *got;
11874
11875 if (!is_ppc64_elf (ibfd))
11876 continue;
11877
11878 got = ppc64_elf_tdata (ibfd)->got;
11879 if (got != NULL)
11880 {
11881 done_something = got->rawsize != got->size;
11882 if (done_something)
11883 break;
11884 }
11885 }
11886
11887 if (done_something)
11888 (*htab->params->layout_sections_again) ();
11889
11890 /* Set up for second pass over toc sections to recalculate elf_gp
11891 on input sections. */
11892 htab->toc_bfd = NULL;
11893 htab->toc_first_sec = NULL;
11894 htab->second_toc_pass = TRUE;
11895 return done_something;
11896 }
11897
11898 /* Called after second pass of multitoc partitioning. */
11899
11900 void
11901 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11902 {
11903 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11904
11905 /* After the second pass, toc_curr tracks the TOC offset used
11906 for code sections below in ppc64_elf_next_input_section. */
11907 htab->toc_curr = TOC_BASE_OFF;
11908 }
11909
11910 /* No toc references were found in ISEC. If the code in ISEC makes no
11911 calls, then there's no need to use toc adjusting stubs when branching
11912 into ISEC. Actually, indirect calls from ISEC are OK as they will
11913 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11914 needed, and 2 if a cyclical call-graph was found but no other reason
11915 for a stub was detected. If called from the top level, a return of
11916 2 means the same as a return of 0. */
11917
11918 static int
11919 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11920 {
11921 int ret;
11922
11923 /* Mark this section as checked. */
11924 isec->call_check_done = 1;
11925
11926 /* We know none of our code bearing sections will need toc stubs. */
11927 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11928 return 0;
11929
11930 if (isec->size == 0)
11931 return 0;
11932
11933 if (isec->output_section == NULL)
11934 return 0;
11935
11936 ret = 0;
11937 if (isec->reloc_count != 0)
11938 {
11939 Elf_Internal_Rela *relstart, *rel;
11940 Elf_Internal_Sym *local_syms;
11941 struct ppc_link_hash_table *htab;
11942
11943 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11944 info->keep_memory);
11945 if (relstart == NULL)
11946 return -1;
11947
11948 /* Look for branches to outside of this section. */
11949 local_syms = NULL;
11950 htab = ppc_hash_table (info);
11951 if (htab == NULL)
11952 return -1;
11953
11954 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11955 {
11956 enum elf_ppc64_reloc_type r_type;
11957 unsigned long r_symndx;
11958 struct elf_link_hash_entry *h;
11959 struct ppc_link_hash_entry *eh;
11960 Elf_Internal_Sym *sym;
11961 asection *sym_sec;
11962 struct _opd_sec_data *opd;
11963 bfd_vma sym_value;
11964 bfd_vma dest;
11965
11966 r_type = ELF64_R_TYPE (rel->r_info);
11967 if (r_type != R_PPC64_REL24
11968 && r_type != R_PPC64_REL14
11969 && r_type != R_PPC64_REL14_BRTAKEN
11970 && r_type != R_PPC64_REL14_BRNTAKEN)
11971 continue;
11972
11973 r_symndx = ELF64_R_SYM (rel->r_info);
11974 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11975 isec->owner))
11976 {
11977 ret = -1;
11978 break;
11979 }
11980
11981 /* Calls to dynamic lib functions go through a plt call stub
11982 that uses r2. */
11983 eh = (struct ppc_link_hash_entry *) h;
11984 if (eh != NULL
11985 && (eh->elf.plt.plist != NULL
11986 || (eh->oh != NULL
11987 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11988 {
11989 ret = 1;
11990 break;
11991 }
11992
11993 if (sym_sec == NULL)
11994 /* Ignore other undefined symbols. */
11995 continue;
11996
11997 /* Assume branches to other sections not included in the
11998 link need stubs too, to cover -R and absolute syms. */
11999 if (sym_sec->output_section == NULL)
12000 {
12001 ret = 1;
12002 break;
12003 }
12004
12005 if (h == NULL)
12006 sym_value = sym->st_value;
12007 else
12008 {
12009 if (h->root.type != bfd_link_hash_defined
12010 && h->root.type != bfd_link_hash_defweak)
12011 abort ();
12012 sym_value = h->root.u.def.value;
12013 }
12014 sym_value += rel->r_addend;
12015
12016 /* If this branch reloc uses an opd sym, find the code section. */
12017 opd = get_opd_info (sym_sec);
12018 if (opd != NULL)
12019 {
12020 if (h == NULL && opd->adjust != NULL)
12021 {
12022 long adjust;
12023
12024 adjust = opd->adjust[OPD_NDX (sym_value)];
12025 if (adjust == -1)
12026 /* Assume deleted functions won't ever be called. */
12027 continue;
12028 sym_value += adjust;
12029 }
12030
12031 dest = opd_entry_value (sym_sec, sym_value,
12032 &sym_sec, NULL, FALSE);
12033 if (dest == (bfd_vma) -1)
12034 continue;
12035 }
12036 else
12037 dest = (sym_value
12038 + sym_sec->output_offset
12039 + sym_sec->output_section->vma);
12040
12041 /* Ignore branch to self. */
12042 if (sym_sec == isec)
12043 continue;
12044
12045 /* If the called function uses the toc, we need a stub. */
12046 if (sym_sec->has_toc_reloc
12047 || sym_sec->makes_toc_func_call)
12048 {
12049 ret = 1;
12050 break;
12051 }
12052
12053 /* Assume any branch that needs a long branch stub might in fact
12054 need a plt_branch stub. A plt_branch stub uses r2. */
12055 else if (dest - (isec->output_offset
12056 + isec->output_section->vma
12057 + rel->r_offset) + (1 << 25)
12058 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12059 ? h->other
12060 : sym->st_other))
12061 {
12062 ret = 1;
12063 break;
12064 }
12065
12066 /* If calling back to a section in the process of being
12067 tested, we can't say for sure that no toc adjusting stubs
12068 are needed, so don't return zero. */
12069 else if (sym_sec->call_check_in_progress)
12070 ret = 2;
12071
12072 /* Branches to another section that itself doesn't have any TOC
12073 references are OK. Recursively call ourselves to check. */
12074 else if (!sym_sec->call_check_done)
12075 {
12076 int recur;
12077
12078 /* Mark current section as indeterminate, so that other
12079 sections that call back to current won't be marked as
12080 known. */
12081 isec->call_check_in_progress = 1;
12082 recur = toc_adjusting_stub_needed (info, sym_sec);
12083 isec->call_check_in_progress = 0;
12084
12085 if (recur != 0)
12086 {
12087 ret = recur;
12088 if (recur != 2)
12089 break;
12090 }
12091 }
12092 }
12093
12094 if (local_syms != NULL
12095 && (elf_symtab_hdr (isec->owner).contents
12096 != (unsigned char *) local_syms))
12097 free (local_syms);
12098 if (elf_section_data (isec)->relocs != relstart)
12099 free (relstart);
12100 }
12101
12102 if ((ret & 1) == 0
12103 && isec->map_head.s != NULL
12104 && (strcmp (isec->output_section->name, ".init") == 0
12105 || strcmp (isec->output_section->name, ".fini") == 0))
12106 {
12107 if (isec->map_head.s->has_toc_reloc
12108 || isec->map_head.s->makes_toc_func_call)
12109 ret = 1;
12110 else if (!isec->map_head.s->call_check_done)
12111 {
12112 int recur;
12113 isec->call_check_in_progress = 1;
12114 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12115 isec->call_check_in_progress = 0;
12116 if (recur != 0)
12117 ret = recur;
12118 }
12119 }
12120
12121 if (ret == 1)
12122 isec->makes_toc_func_call = 1;
12123
12124 return ret;
12125 }
12126
12127 /* The linker repeatedly calls this function for each input section,
12128 in the order that input sections are linked into output sections.
12129 Build lists of input sections to determine groupings between which
12130 we may insert linker stubs. */
12131
12132 bfd_boolean
12133 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12134 {
12135 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12136
12137 if (htab == NULL)
12138 return FALSE;
12139
12140 if ((isec->output_section->flags & SEC_CODE) != 0
12141 && isec->output_section->id < htab->sec_info_arr_size)
12142 {
12143 /* This happens to make the list in reverse order,
12144 which is what we want. */
12145 htab->sec_info[isec->id].u.list
12146 = htab->sec_info[isec->output_section->id].u.list;
12147 htab->sec_info[isec->output_section->id].u.list = isec;
12148 }
12149
12150 if (htab->multi_toc_needed)
12151 {
12152 /* Analyse sections that aren't already flagged as needing a
12153 valid toc pointer. Exclude .fixup for the linux kernel.
12154 .fixup contains branches, but only back to the function that
12155 hit an exception. */
12156 if (!(isec->has_toc_reloc
12157 || (isec->flags & SEC_CODE) == 0
12158 || strcmp (isec->name, ".fixup") == 0
12159 || isec->call_check_done))
12160 {
12161 if (toc_adjusting_stub_needed (info, isec) < 0)
12162 return FALSE;
12163 }
12164 /* Make all sections use the TOC assigned for this object file.
12165 This will be wrong for pasted sections; We fix that in
12166 check_pasted_section(). */
12167 if (elf_gp (isec->owner) != 0)
12168 htab->toc_curr = elf_gp (isec->owner);
12169 }
12170
12171 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12172 return TRUE;
12173 }
12174
12175 /* Check that all .init and .fini sections use the same toc, if they
12176 have toc relocs. */
12177
12178 static bfd_boolean
12179 check_pasted_section (struct bfd_link_info *info, const char *name)
12180 {
12181 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12182
12183 if (o != NULL)
12184 {
12185 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12186 bfd_vma toc_off = 0;
12187 asection *i;
12188
12189 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12190 if (i->has_toc_reloc)
12191 {
12192 if (toc_off == 0)
12193 toc_off = htab->sec_info[i->id].toc_off;
12194 else if (toc_off != htab->sec_info[i->id].toc_off)
12195 return FALSE;
12196 }
12197
12198 if (toc_off == 0)
12199 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12200 if (i->makes_toc_func_call)
12201 {
12202 toc_off = htab->sec_info[i->id].toc_off;
12203 break;
12204 }
12205
12206 /* Make sure the whole pasted function uses the same toc offset. */
12207 if (toc_off != 0)
12208 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12209 htab->sec_info[i->id].toc_off = toc_off;
12210 }
12211 return TRUE;
12212 }
12213
12214 bfd_boolean
12215 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12216 {
12217 return (check_pasted_section (info, ".init")
12218 & check_pasted_section (info, ".fini"));
12219 }
12220
12221 /* See whether we can group stub sections together. Grouping stub
12222 sections may result in fewer stubs. More importantly, we need to
12223 put all .init* and .fini* stubs at the beginning of the .init or
12224 .fini output sections respectively, because glibc splits the
12225 _init and _fini functions into multiple parts. Putting a stub in
12226 the middle of a function is not a good idea. */
12227
12228 static bfd_boolean
12229 group_sections (struct bfd_link_info *info,
12230 bfd_size_type stub_group_size,
12231 bfd_boolean stubs_always_before_branch)
12232 {
12233 struct ppc_link_hash_table *htab;
12234 asection *osec;
12235 bfd_boolean suppress_size_errors;
12236
12237 htab = ppc_hash_table (info);
12238 if (htab == NULL)
12239 return FALSE;
12240
12241 suppress_size_errors = FALSE;
12242 if (stub_group_size == 1)
12243 {
12244 /* Default values. */
12245 if (stubs_always_before_branch)
12246 stub_group_size = 0x1e00000;
12247 else
12248 stub_group_size = 0x1c00000;
12249 suppress_size_errors = TRUE;
12250 }
12251
12252 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12253 {
12254 asection *tail;
12255
12256 if (osec->id >= htab->sec_info_arr_size)
12257 continue;
12258
12259 tail = htab->sec_info[osec->id].u.list;
12260 while (tail != NULL)
12261 {
12262 asection *curr;
12263 asection *prev;
12264 bfd_size_type total;
12265 bfd_boolean big_sec;
12266 bfd_vma curr_toc;
12267 struct map_stub *group;
12268 bfd_size_type group_size;
12269
12270 curr = tail;
12271 total = tail->size;
12272 group_size = (ppc64_elf_section_data (tail) != NULL
12273 && ppc64_elf_section_data (tail)->has_14bit_branch
12274 ? stub_group_size >> 10 : stub_group_size);
12275
12276 big_sec = total > group_size;
12277 if (big_sec && !suppress_size_errors)
12278 /* xgettext:c-format */
12279 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12280 tail->owner, tail);
12281 curr_toc = htab->sec_info[tail->id].toc_off;
12282
12283 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12284 && ((total += curr->output_offset - prev->output_offset)
12285 < (ppc64_elf_section_data (prev) != NULL
12286 && ppc64_elf_section_data (prev)->has_14bit_branch
12287 ? (group_size = stub_group_size >> 10) : group_size))
12288 && htab->sec_info[prev->id].toc_off == curr_toc)
12289 curr = prev;
12290
12291 /* OK, the size from the start of CURR to the end is less
12292 than group_size and thus can be handled by one stub
12293 section. (or the tail section is itself larger than
12294 group_size, in which case we may be toast.) We should
12295 really be keeping track of the total size of stubs added
12296 here, as stubs contribute to the final output section
12297 size. That's a little tricky, and this way will only
12298 break if stubs added make the total size more than 2^25,
12299 ie. for the default stub_group_size, if stubs total more
12300 than 2097152 bytes, or nearly 75000 plt call stubs. */
12301 group = bfd_alloc (curr->owner, sizeof (*group));
12302 if (group == NULL)
12303 return FALSE;
12304 group->link_sec = curr;
12305 group->stub_sec = NULL;
12306 group->needs_save_res = 0;
12307 group->tls_get_addr_opt_bctrl = -1u;
12308 group->next = htab->group;
12309 htab->group = group;
12310 do
12311 {
12312 prev = htab->sec_info[tail->id].u.list;
12313 /* Set up this stub group. */
12314 htab->sec_info[tail->id].u.group = group;
12315 }
12316 while (tail != curr && (tail = prev) != NULL);
12317
12318 /* But wait, there's more! Input sections up to group_size
12319 bytes before the stub section can be handled by it too.
12320 Don't do this if we have a really large section after the
12321 stubs, as adding more stubs increases the chance that
12322 branches may not reach into the stub section. */
12323 if (!stubs_always_before_branch && !big_sec)
12324 {
12325 total = 0;
12326 while (prev != NULL
12327 && ((total += tail->output_offset - prev->output_offset)
12328 < (ppc64_elf_section_data (prev) != NULL
12329 && ppc64_elf_section_data (prev)->has_14bit_branch
12330 ? (group_size = stub_group_size >> 10) : group_size))
12331 && htab->sec_info[prev->id].toc_off == curr_toc)
12332 {
12333 tail = prev;
12334 prev = htab->sec_info[tail->id].u.list;
12335 htab->sec_info[tail->id].u.group = group;
12336 }
12337 }
12338 tail = prev;
12339 }
12340 }
12341 return TRUE;
12342 }
12343
12344 static const unsigned char glink_eh_frame_cie[] =
12345 {
12346 0, 0, 0, 16, /* length. */
12347 0, 0, 0, 0, /* id. */
12348 1, /* CIE version. */
12349 'z', 'R', 0, /* Augmentation string. */
12350 4, /* Code alignment. */
12351 0x78, /* Data alignment. */
12352 65, /* RA reg. */
12353 1, /* Augmentation size. */
12354 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12355 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12356 };
12357
12358 static size_t
12359 stub_eh_frame_size (struct map_stub *group, size_t align)
12360 {
12361 size_t this_size = 17;
12362 if (group->tls_get_addr_opt_bctrl != -1u)
12363 {
12364 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12365 if (to_bctrl < 64)
12366 this_size += 1;
12367 else if (to_bctrl < 256)
12368 this_size += 2;
12369 else if (to_bctrl < 65536)
12370 this_size += 3;
12371 else
12372 this_size += 5;
12373 this_size += 6;
12374 }
12375 this_size = (this_size + align - 1) & -align;
12376 return this_size;
12377 }
12378
12379 /* Stripping output sections is normally done before dynamic section
12380 symbols have been allocated. This function is called later, and
12381 handles cases like htab->brlt which is mapped to its own output
12382 section. */
12383
12384 static void
12385 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12386 {
12387 if (isec->size == 0
12388 && isec->output_section->size == 0
12389 && !(isec->output_section->flags & SEC_KEEP)
12390 && !bfd_section_removed_from_list (info->output_bfd,
12391 isec->output_section)
12392 && elf_section_data (isec->output_section)->dynindx == 0)
12393 {
12394 isec->output_section->flags |= SEC_EXCLUDE;
12395 bfd_section_list_remove (info->output_bfd, isec->output_section);
12396 info->output_bfd->section_count--;
12397 }
12398 }
12399
12400 /* Determine and set the size of the stub section for a final link.
12401
12402 The basic idea here is to examine all the relocations looking for
12403 PC-relative calls to a target that is unreachable with a "bl"
12404 instruction. */
12405
12406 bfd_boolean
12407 ppc64_elf_size_stubs (struct bfd_link_info *info)
12408 {
12409 bfd_size_type stub_group_size;
12410 bfd_boolean stubs_always_before_branch;
12411 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12412
12413 if (htab == NULL)
12414 return FALSE;
12415
12416 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12417 htab->params->plt_thread_safe = 1;
12418 if (!htab->opd_abi)
12419 htab->params->plt_thread_safe = 0;
12420 else if (htab->params->plt_thread_safe == -1)
12421 {
12422 static const char *const thread_starter[] =
12423 {
12424 "pthread_create",
12425 /* libstdc++ */
12426 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12427 /* librt */
12428 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12429 "mq_notify", "create_timer",
12430 /* libanl */
12431 "getaddrinfo_a",
12432 /* libgomp */
12433 "GOMP_parallel",
12434 "GOMP_parallel_start",
12435 "GOMP_parallel_loop_static",
12436 "GOMP_parallel_loop_static_start",
12437 "GOMP_parallel_loop_dynamic",
12438 "GOMP_parallel_loop_dynamic_start",
12439 "GOMP_parallel_loop_guided",
12440 "GOMP_parallel_loop_guided_start",
12441 "GOMP_parallel_loop_runtime",
12442 "GOMP_parallel_loop_runtime_start",
12443 "GOMP_parallel_sections",
12444 "GOMP_parallel_sections_start",
12445 /* libgo */
12446 "__go_go",
12447 };
12448 unsigned i;
12449
12450 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12451 {
12452 struct elf_link_hash_entry *h;
12453 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12454 FALSE, FALSE, TRUE);
12455 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12456 if (htab->params->plt_thread_safe)
12457 break;
12458 }
12459 }
12460 stubs_always_before_branch = htab->params->group_size < 0;
12461 if (htab->params->group_size < 0)
12462 stub_group_size = -htab->params->group_size;
12463 else
12464 stub_group_size = htab->params->group_size;
12465
12466 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12467 return FALSE;
12468
12469 #define STUB_SHRINK_ITER 20
12470 /* Loop until no stubs added. After iteration 20 of this loop we may
12471 exit on a stub section shrinking. This is to break out of a
12472 pathological case where adding stubs on one iteration decreases
12473 section gaps (perhaps due to alignment), which then requires
12474 fewer or smaller stubs on the next iteration. */
12475
12476 while (1)
12477 {
12478 bfd *input_bfd;
12479 unsigned int bfd_indx;
12480 struct map_stub *group;
12481
12482 htab->stub_iteration += 1;
12483
12484 for (input_bfd = info->input_bfds, bfd_indx = 0;
12485 input_bfd != NULL;
12486 input_bfd = input_bfd->link.next, bfd_indx++)
12487 {
12488 Elf_Internal_Shdr *symtab_hdr;
12489 asection *section;
12490 Elf_Internal_Sym *local_syms = NULL;
12491
12492 if (!is_ppc64_elf (input_bfd))
12493 continue;
12494
12495 /* We'll need the symbol table in a second. */
12496 symtab_hdr = &elf_symtab_hdr (input_bfd);
12497 if (symtab_hdr->sh_info == 0)
12498 continue;
12499
12500 /* Walk over each section attached to the input bfd. */
12501 for (section = input_bfd->sections;
12502 section != NULL;
12503 section = section->next)
12504 {
12505 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12506
12507 /* If there aren't any relocs, then there's nothing more
12508 to do. */
12509 if ((section->flags & SEC_RELOC) == 0
12510 || (section->flags & SEC_ALLOC) == 0
12511 || (section->flags & SEC_LOAD) == 0
12512 || (section->flags & SEC_CODE) == 0
12513 || section->reloc_count == 0)
12514 continue;
12515
12516 /* If this section is a link-once section that will be
12517 discarded, then don't create any stubs. */
12518 if (section->output_section == NULL
12519 || section->output_section->owner != info->output_bfd)
12520 continue;
12521
12522 /* Get the relocs. */
12523 internal_relocs
12524 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12525 info->keep_memory);
12526 if (internal_relocs == NULL)
12527 goto error_ret_free_local;
12528
12529 /* Now examine each relocation. */
12530 irela = internal_relocs;
12531 irelaend = irela + section->reloc_count;
12532 for (; irela < irelaend; irela++)
12533 {
12534 enum elf_ppc64_reloc_type r_type;
12535 unsigned int r_indx;
12536 enum ppc_stub_type stub_type;
12537 struct ppc_stub_hash_entry *stub_entry;
12538 asection *sym_sec, *code_sec;
12539 bfd_vma sym_value, code_value;
12540 bfd_vma destination;
12541 unsigned long local_off;
12542 bfd_boolean ok_dest;
12543 struct ppc_link_hash_entry *hash;
12544 struct ppc_link_hash_entry *fdh;
12545 struct elf_link_hash_entry *h;
12546 Elf_Internal_Sym *sym;
12547 char *stub_name;
12548 const asection *id_sec;
12549 struct _opd_sec_data *opd;
12550 struct plt_entry *plt_ent;
12551
12552 r_type = ELF64_R_TYPE (irela->r_info);
12553 r_indx = ELF64_R_SYM (irela->r_info);
12554
12555 if (r_type >= R_PPC64_max)
12556 {
12557 bfd_set_error (bfd_error_bad_value);
12558 goto error_ret_free_internal;
12559 }
12560
12561 /* Only look for stubs on branch instructions. */
12562 if (r_type != R_PPC64_REL24
12563 && r_type != R_PPC64_REL14
12564 && r_type != R_PPC64_REL14_BRTAKEN
12565 && r_type != R_PPC64_REL14_BRNTAKEN)
12566 continue;
12567
12568 /* Now determine the call target, its name, value,
12569 section. */
12570 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12571 r_indx, input_bfd))
12572 goto error_ret_free_internal;
12573 hash = (struct ppc_link_hash_entry *) h;
12574
12575 ok_dest = FALSE;
12576 fdh = NULL;
12577 sym_value = 0;
12578 if (hash == NULL)
12579 {
12580 sym_value = sym->st_value;
12581 if (sym_sec != NULL
12582 && sym_sec->output_section != NULL)
12583 ok_dest = TRUE;
12584 }
12585 else if (hash->elf.root.type == bfd_link_hash_defined
12586 || hash->elf.root.type == bfd_link_hash_defweak)
12587 {
12588 sym_value = hash->elf.root.u.def.value;
12589 if (sym_sec->output_section != NULL)
12590 ok_dest = TRUE;
12591 }
12592 else if (hash->elf.root.type == bfd_link_hash_undefweak
12593 || hash->elf.root.type == bfd_link_hash_undefined)
12594 {
12595 /* Recognise an old ABI func code entry sym, and
12596 use the func descriptor sym instead if it is
12597 defined. */
12598 if (hash->elf.root.root.string[0] == '.'
12599 && hash->oh != NULL)
12600 {
12601 fdh = ppc_follow_link (hash->oh);
12602 if (fdh->elf.root.type == bfd_link_hash_defined
12603 || fdh->elf.root.type == bfd_link_hash_defweak)
12604 {
12605 sym_sec = fdh->elf.root.u.def.section;
12606 sym_value = fdh->elf.root.u.def.value;
12607 if (sym_sec->output_section != NULL)
12608 ok_dest = TRUE;
12609 }
12610 else
12611 fdh = NULL;
12612 }
12613 }
12614 else
12615 {
12616 bfd_set_error (bfd_error_bad_value);
12617 goto error_ret_free_internal;
12618 }
12619
12620 destination = 0;
12621 local_off = 0;
12622 if (ok_dest)
12623 {
12624 sym_value += irela->r_addend;
12625 destination = (sym_value
12626 + sym_sec->output_offset
12627 + sym_sec->output_section->vma);
12628 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12629 ? hash->elf.other
12630 : sym->st_other);
12631 }
12632
12633 code_sec = sym_sec;
12634 code_value = sym_value;
12635 opd = get_opd_info (sym_sec);
12636 if (opd != NULL)
12637 {
12638 bfd_vma dest;
12639
12640 if (hash == NULL && opd->adjust != NULL)
12641 {
12642 long adjust = opd->adjust[OPD_NDX (sym_value)];
12643 if (adjust == -1)
12644 continue;
12645 code_value += adjust;
12646 sym_value += adjust;
12647 }
12648 dest = opd_entry_value (sym_sec, sym_value,
12649 &code_sec, &code_value, FALSE);
12650 if (dest != (bfd_vma) -1)
12651 {
12652 destination = dest;
12653 if (fdh != NULL)
12654 {
12655 /* Fixup old ABI sym to point at code
12656 entry. */
12657 hash->elf.root.type = bfd_link_hash_defweak;
12658 hash->elf.root.u.def.section = code_sec;
12659 hash->elf.root.u.def.value = code_value;
12660 }
12661 }
12662 }
12663
12664 /* Determine what (if any) linker stub is needed. */
12665 plt_ent = NULL;
12666 stub_type = ppc_type_of_stub (section, irela, &hash,
12667 &plt_ent, destination,
12668 local_off);
12669
12670 if (stub_type != ppc_stub_plt_call)
12671 {
12672 /* Check whether we need a TOC adjusting stub.
12673 Since the linker pastes together pieces from
12674 different object files when creating the
12675 _init and _fini functions, it may be that a
12676 call to what looks like a local sym is in
12677 fact a call needing a TOC adjustment. */
12678 if (code_sec != NULL
12679 && code_sec->output_section != NULL
12680 && (htab->sec_info[code_sec->id].toc_off
12681 != htab->sec_info[section->id].toc_off)
12682 && (code_sec->has_toc_reloc
12683 || code_sec->makes_toc_func_call))
12684 stub_type = ppc_stub_long_branch_r2off;
12685 }
12686
12687 if (stub_type == ppc_stub_none)
12688 continue;
12689
12690 /* __tls_get_addr calls might be eliminated. */
12691 if (stub_type != ppc_stub_plt_call
12692 && hash != NULL
12693 && (hash == htab->tls_get_addr
12694 || hash == htab->tls_get_addr_fd)
12695 && section->has_tls_reloc
12696 && irela != internal_relocs)
12697 {
12698 /* Get tls info. */
12699 unsigned char *tls_mask;
12700
12701 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12702 irela - 1, input_bfd))
12703 goto error_ret_free_internal;
12704 if (*tls_mask != 0)
12705 continue;
12706 }
12707
12708 if (stub_type == ppc_stub_plt_call)
12709 {
12710 if (!htab->opd_abi
12711 && htab->params->plt_localentry0 != 0
12712 && is_elfv2_localentry0 (&hash->elf))
12713 htab->has_plt_localentry0 = 1;
12714 else if (irela + 1 < irelaend
12715 && irela[1].r_offset == irela->r_offset + 4
12716 && (ELF64_R_TYPE (irela[1].r_info)
12717 == R_PPC64_TOCSAVE))
12718 {
12719 if (!tocsave_find (htab, INSERT,
12720 &local_syms, irela + 1, input_bfd))
12721 goto error_ret_free_internal;
12722 }
12723 else
12724 stub_type = ppc_stub_plt_call_r2save;
12725 }
12726
12727 /* Support for grouping stub sections. */
12728 id_sec = htab->sec_info[section->id].u.group->link_sec;
12729
12730 /* Get the name of this stub. */
12731 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12732 if (!stub_name)
12733 goto error_ret_free_internal;
12734
12735 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12736 stub_name, FALSE, FALSE);
12737 if (stub_entry != NULL)
12738 {
12739 /* The proper stub has already been created. */
12740 free (stub_name);
12741 if (stub_type == ppc_stub_plt_call_r2save)
12742 stub_entry->stub_type = stub_type;
12743 continue;
12744 }
12745
12746 stub_entry = ppc_add_stub (stub_name, section, info);
12747 if (stub_entry == NULL)
12748 {
12749 free (stub_name);
12750 error_ret_free_internal:
12751 if (elf_section_data (section)->relocs == NULL)
12752 free (internal_relocs);
12753 error_ret_free_local:
12754 if (local_syms != NULL
12755 && (symtab_hdr->contents
12756 != (unsigned char *) local_syms))
12757 free (local_syms);
12758 return FALSE;
12759 }
12760
12761 stub_entry->stub_type = stub_type;
12762 if (stub_type != ppc_stub_plt_call
12763 && stub_type != ppc_stub_plt_call_r2save)
12764 {
12765 stub_entry->target_value = code_value;
12766 stub_entry->target_section = code_sec;
12767 }
12768 else
12769 {
12770 stub_entry->target_value = sym_value;
12771 stub_entry->target_section = sym_sec;
12772 }
12773 stub_entry->h = hash;
12774 stub_entry->plt_ent = plt_ent;
12775 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12776
12777 if (stub_entry->h != NULL)
12778 htab->stub_globals += 1;
12779 }
12780
12781 /* We're done with the internal relocs, free them. */
12782 if (elf_section_data (section)->relocs != internal_relocs)
12783 free (internal_relocs);
12784 }
12785
12786 if (local_syms != NULL
12787 && symtab_hdr->contents != (unsigned char *) local_syms)
12788 {
12789 if (!info->keep_memory)
12790 free (local_syms);
12791 else
12792 symtab_hdr->contents = (unsigned char *) local_syms;
12793 }
12794 }
12795
12796 /* We may have added some stubs. Find out the new size of the
12797 stub sections. */
12798 for (group = htab->group; group != NULL; group = group->next)
12799 if (group->stub_sec != NULL)
12800 {
12801 asection *stub_sec = group->stub_sec;
12802
12803 if (htab->stub_iteration <= STUB_SHRINK_ITER
12804 || stub_sec->rawsize < stub_sec->size)
12805 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12806 stub_sec->rawsize = stub_sec->size;
12807 stub_sec->size = 0;
12808 stub_sec->reloc_count = 0;
12809 stub_sec->flags &= ~SEC_RELOC;
12810 }
12811
12812 htab->brlt->size = 0;
12813 htab->brlt->reloc_count = 0;
12814 htab->brlt->flags &= ~SEC_RELOC;
12815 if (htab->relbrlt != NULL)
12816 htab->relbrlt->size = 0;
12817
12818 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12819
12820 for (group = htab->group; group != NULL; group = group->next)
12821 if (group->needs_save_res)
12822 group->stub_sec->size += htab->sfpr->size;
12823
12824 if (info->emitrelocations
12825 && htab->glink != NULL && htab->glink->size != 0)
12826 {
12827 htab->glink->reloc_count = 1;
12828 htab->glink->flags |= SEC_RELOC;
12829 }
12830
12831 if (htab->glink_eh_frame != NULL
12832 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12833 && htab->glink_eh_frame->output_section->size != 0)
12834 {
12835 size_t size = 0, align = 4;
12836
12837 for (group = htab->group; group != NULL; group = group->next)
12838 if (group->stub_sec != NULL)
12839 size += stub_eh_frame_size (group, align);
12840 if (htab->glink != NULL && htab->glink->size != 0)
12841 size += (24 + align - 1) & -align;
12842 if (size != 0)
12843 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12844 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12845 size = (size + align - 1) & -align;
12846 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12847 htab->glink_eh_frame->size = size;
12848 }
12849
12850 if (htab->params->plt_stub_align != 0)
12851 for (group = htab->group; group != NULL; group = group->next)
12852 if (group->stub_sec != NULL)
12853 group->stub_sec->size = ((group->stub_sec->size
12854 + (1 << htab->params->plt_stub_align) - 1)
12855 & -(1 << htab->params->plt_stub_align));
12856
12857 for (group = htab->group; group != NULL; group = group->next)
12858 if (group->stub_sec != NULL
12859 && group->stub_sec->rawsize != group->stub_sec->size
12860 && (htab->stub_iteration <= STUB_SHRINK_ITER
12861 || group->stub_sec->rawsize < group->stub_sec->size))
12862 break;
12863
12864 if (group == NULL
12865 && (htab->glink_eh_frame == NULL
12866 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12867 break;
12868
12869 /* Ask the linker to do its stuff. */
12870 (*htab->params->layout_sections_again) ();
12871 }
12872
12873 if (htab->glink_eh_frame != NULL
12874 && htab->glink_eh_frame->size != 0)
12875 {
12876 bfd_vma val;
12877 bfd_byte *p, *last_fde;
12878 size_t last_fde_len, size, align, pad;
12879 struct map_stub *group;
12880
12881 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12882 if (p == NULL)
12883 return FALSE;
12884 htab->glink_eh_frame->contents = p;
12885 last_fde = p;
12886 align = 4;
12887
12888 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12889 /* CIE length (rewrite in case little-endian). */
12890 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12891 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12892 p += last_fde_len + 4;
12893
12894 for (group = htab->group; group != NULL; group = group->next)
12895 if (group->stub_sec != NULL)
12896 {
12897 last_fde = p;
12898 last_fde_len = stub_eh_frame_size (group, align) - 4;
12899 /* FDE length. */
12900 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12901 p += 4;
12902 /* CIE pointer. */
12903 val = p - htab->glink_eh_frame->contents;
12904 bfd_put_32 (htab->elf.dynobj, val, p);
12905 p += 4;
12906 /* Offset to stub section, written later. */
12907 p += 4;
12908 /* stub section size. */
12909 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12910 p += 4;
12911 /* Augmentation. */
12912 p += 1;
12913 if (group->tls_get_addr_opt_bctrl != -1u)
12914 {
12915 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12916
12917 /* This FDE needs more than just the default.
12918 Describe __tls_get_addr_opt stub LR. */
12919 if (to_bctrl < 64)
12920 *p++ = DW_CFA_advance_loc + to_bctrl;
12921 else if (to_bctrl < 256)
12922 {
12923 *p++ = DW_CFA_advance_loc1;
12924 *p++ = to_bctrl;
12925 }
12926 else if (to_bctrl < 65536)
12927 {
12928 *p++ = DW_CFA_advance_loc2;
12929 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12930 p += 2;
12931 }
12932 else
12933 {
12934 *p++ = DW_CFA_advance_loc4;
12935 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12936 p += 4;
12937 }
12938 *p++ = DW_CFA_offset_extended_sf;
12939 *p++ = 65;
12940 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12941 *p++ = DW_CFA_advance_loc + 4;
12942 *p++ = DW_CFA_restore_extended;
12943 *p++ = 65;
12944 }
12945 /* Pad. */
12946 p = last_fde + last_fde_len + 4;
12947 }
12948 if (htab->glink != NULL && htab->glink->size != 0)
12949 {
12950 last_fde = p;
12951 last_fde_len = ((24 + align - 1) & -align) - 4;
12952 /* FDE length. */
12953 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12954 p += 4;
12955 /* CIE pointer. */
12956 val = p - htab->glink_eh_frame->contents;
12957 bfd_put_32 (htab->elf.dynobj, val, p);
12958 p += 4;
12959 /* Offset to .glink, written later. */
12960 p += 4;
12961 /* .glink size. */
12962 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12963 p += 4;
12964 /* Augmentation. */
12965 p += 1;
12966
12967 *p++ = DW_CFA_advance_loc + 1;
12968 *p++ = DW_CFA_register;
12969 *p++ = 65;
12970 *p++ = htab->opd_abi ? 12 : 0;
12971 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12972 *p++ = DW_CFA_restore_extended;
12973 *p++ = 65;
12974 p += ((24 + align - 1) & -align) - 24;
12975 }
12976 /* Subsume any padding into the last FDE if user .eh_frame
12977 sections are aligned more than glink_eh_frame. Otherwise any
12978 zero padding will be seen as a terminator. */
12979 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12980 size = p - htab->glink_eh_frame->contents;
12981 pad = ((size + align - 1) & -align) - size;
12982 htab->glink_eh_frame->size = size + pad;
12983 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12984 }
12985
12986 maybe_strip_output (info, htab->brlt);
12987 if (htab->glink_eh_frame != NULL)
12988 maybe_strip_output (info, htab->glink_eh_frame);
12989
12990 return TRUE;
12991 }
12992
12993 /* Called after we have determined section placement. If sections
12994 move, we'll be called again. Provide a value for TOCstart. */
12995
12996 bfd_vma
12997 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12998 {
12999 asection *s;
13000 bfd_vma TOCstart, adjust;
13001
13002 if (info != NULL)
13003 {
13004 struct elf_link_hash_entry *h;
13005 struct elf_link_hash_table *htab = elf_hash_table (info);
13006
13007 if (is_elf_hash_table (htab)
13008 && htab->hgot != NULL)
13009 h = htab->hgot;
13010 else
13011 {
13012 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
13013 if (is_elf_hash_table (htab))
13014 htab->hgot = h;
13015 }
13016 if (h != NULL
13017 && h->root.type == bfd_link_hash_defined
13018 && !h->root.linker_def
13019 && (!is_elf_hash_table (htab)
13020 || h->def_regular))
13021 {
13022 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
13023 + h->root.u.def.section->output_offset
13024 + h->root.u.def.section->output_section->vma);
13025 _bfd_set_gp_value (obfd, TOCstart);
13026 return TOCstart;
13027 }
13028 }
13029
13030 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
13031 order. The TOC starts where the first of these sections starts. */
13032 s = bfd_get_section_by_name (obfd, ".got");
13033 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13034 s = bfd_get_section_by_name (obfd, ".toc");
13035 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13036 s = bfd_get_section_by_name (obfd, ".tocbss");
13037 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13038 s = bfd_get_section_by_name (obfd, ".plt");
13039 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13040 {
13041 /* This may happen for
13042 o references to TOC base (SYM@toc / TOC[tc0]) without a
13043 .toc directive
13044 o bad linker script
13045 o --gc-sections and empty TOC sections
13046
13047 FIXME: Warn user? */
13048
13049 /* Look for a likely section. We probably won't even be
13050 using TOCstart. */
13051 for (s = obfd->sections; s != NULL; s = s->next)
13052 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13053 | SEC_EXCLUDE))
13054 == (SEC_ALLOC | SEC_SMALL_DATA))
13055 break;
13056 if (s == NULL)
13057 for (s = obfd->sections; s != NULL; s = s->next)
13058 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13059 == (SEC_ALLOC | SEC_SMALL_DATA))
13060 break;
13061 if (s == NULL)
13062 for (s = obfd->sections; s != NULL; s = s->next)
13063 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13064 == SEC_ALLOC)
13065 break;
13066 if (s == NULL)
13067 for (s = obfd->sections; s != NULL; s = s->next)
13068 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13069 break;
13070 }
13071
13072 TOCstart = 0;
13073 if (s != NULL)
13074 TOCstart = s->output_section->vma + s->output_offset;
13075
13076 /* Force alignment. */
13077 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13078 TOCstart -= adjust;
13079 _bfd_set_gp_value (obfd, TOCstart);
13080
13081 if (info != NULL && s != NULL)
13082 {
13083 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13084
13085 if (htab != NULL)
13086 {
13087 if (htab->elf.hgot != NULL)
13088 {
13089 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13090 htab->elf.hgot->root.u.def.section = s;
13091 }
13092 }
13093 else
13094 {
13095 struct bfd_link_hash_entry *bh = NULL;
13096 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13097 s, TOC_BASE_OFF - adjust,
13098 NULL, FALSE, FALSE, &bh);
13099 }
13100 }
13101 return TOCstart;
13102 }
13103
13104 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13105 write out any global entry stubs. */
13106
13107 static bfd_boolean
13108 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13109 {
13110 struct bfd_link_info *info;
13111 struct ppc_link_hash_table *htab;
13112 struct plt_entry *pent;
13113 asection *s;
13114
13115 if (h->root.type == bfd_link_hash_indirect)
13116 return TRUE;
13117
13118 if (!h->pointer_equality_needed)
13119 return TRUE;
13120
13121 if (h->def_regular)
13122 return TRUE;
13123
13124 info = inf;
13125 htab = ppc_hash_table (info);
13126 if (htab == NULL)
13127 return FALSE;
13128
13129 s = htab->glink;
13130 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13131 if (pent->plt.offset != (bfd_vma) -1
13132 && pent->addend == 0)
13133 {
13134 bfd_byte *p;
13135 asection *plt;
13136 bfd_vma off;
13137
13138 p = s->contents + h->root.u.def.value;
13139 plt = htab->elf.splt;
13140 if (!htab->elf.dynamic_sections_created
13141 || h->dynindx == -1)
13142 plt = htab->elf.iplt;
13143 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13144 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13145
13146 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13147 {
13148 info->callbacks->einfo
13149 (_("%P: linkage table error against `%T'\n"),
13150 h->root.root.string);
13151 bfd_set_error (bfd_error_bad_value);
13152 htab->stub_error = TRUE;
13153 }
13154
13155 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13156 if (htab->params->emit_stub_syms)
13157 {
13158 size_t len = strlen (h->root.root.string);
13159 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13160
13161 if (name == NULL)
13162 return FALSE;
13163
13164 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13165 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13166 if (h == NULL)
13167 return FALSE;
13168 if (h->root.type == bfd_link_hash_new)
13169 {
13170 h->root.type = bfd_link_hash_defined;
13171 h->root.u.def.section = s;
13172 h->root.u.def.value = p - s->contents;
13173 h->ref_regular = 1;
13174 h->def_regular = 1;
13175 h->ref_regular_nonweak = 1;
13176 h->forced_local = 1;
13177 h->non_elf = 0;
13178 h->root.linker_def = 1;
13179 }
13180 }
13181
13182 if (PPC_HA (off) != 0)
13183 {
13184 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13185 p += 4;
13186 }
13187 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13188 p += 4;
13189 bfd_put_32 (s->owner, MTCTR_R12, p);
13190 p += 4;
13191 bfd_put_32 (s->owner, BCTR, p);
13192 break;
13193 }
13194 return TRUE;
13195 }
13196
13197 /* Build all the stubs associated with the current output file.
13198 The stubs are kept in a hash table attached to the main linker
13199 hash table. This function is called via gldelf64ppc_finish. */
13200
13201 bfd_boolean
13202 ppc64_elf_build_stubs (struct bfd_link_info *info,
13203 char **stats)
13204 {
13205 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13206 struct map_stub *group;
13207 asection *stub_sec;
13208 bfd_byte *p;
13209 int stub_sec_count = 0;
13210
13211 if (htab == NULL)
13212 return FALSE;
13213
13214 /* Allocate memory to hold the linker stubs. */
13215 for (group = htab->group; group != NULL; group = group->next)
13216 if ((stub_sec = group->stub_sec) != NULL
13217 && stub_sec->size != 0)
13218 {
13219 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13220 if (stub_sec->contents == NULL)
13221 return FALSE;
13222 stub_sec->size = 0;
13223 }
13224
13225 if (htab->glink != NULL && htab->glink->size != 0)
13226 {
13227 unsigned int indx;
13228 bfd_vma plt0;
13229
13230 /* Build the .glink plt call stub. */
13231 if (htab->params->emit_stub_syms)
13232 {
13233 struct elf_link_hash_entry *h;
13234 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13235 TRUE, FALSE, FALSE);
13236 if (h == NULL)
13237 return FALSE;
13238 if (h->root.type == bfd_link_hash_new)
13239 {
13240 h->root.type = bfd_link_hash_defined;
13241 h->root.u.def.section = htab->glink;
13242 h->root.u.def.value = 8;
13243 h->ref_regular = 1;
13244 h->def_regular = 1;
13245 h->ref_regular_nonweak = 1;
13246 h->forced_local = 1;
13247 h->non_elf = 0;
13248 h->root.linker_def = 1;
13249 }
13250 }
13251 plt0 = (htab->elf.splt->output_section->vma
13252 + htab->elf.splt->output_offset
13253 - 16);
13254 if (info->emitrelocations)
13255 {
13256 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13257 if (r == NULL)
13258 return FALSE;
13259 r->r_offset = (htab->glink->output_offset
13260 + htab->glink->output_section->vma);
13261 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13262 r->r_addend = plt0;
13263 }
13264 p = htab->glink->contents;
13265 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13266 bfd_put_64 (htab->glink->owner, plt0, p);
13267 p += 8;
13268 if (htab->opd_abi)
13269 {
13270 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13271 p += 4;
13272 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13273 p += 4;
13274 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13275 p += 4;
13276 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13277 p += 4;
13278 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13279 p += 4;
13280 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13281 p += 4;
13282 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13283 p += 4;
13284 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13285 p += 4;
13286 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13287 p += 4;
13288 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13289 p += 4;
13290 }
13291 else
13292 {
13293 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13294 p += 4;
13295 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13296 p += 4;
13297 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13298 p += 4;
13299 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13300 p += 4;
13301 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13302 p += 4;
13303 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13304 p += 4;
13305 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13306 p += 4;
13307 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13308 p += 4;
13309 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13310 p += 4;
13311 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13312 p += 4;
13313 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13314 p += 4;
13315 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13316 p += 4;
13317 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13318 p += 4;
13319 }
13320 bfd_put_32 (htab->glink->owner, BCTR, p);
13321 p += 4;
13322 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13323 {
13324 bfd_put_32 (htab->glink->owner, NOP, p);
13325 p += 4;
13326 }
13327
13328 /* Build the .glink lazy link call stubs. */
13329 indx = 0;
13330 while (p < htab->glink->contents + htab->glink->rawsize)
13331 {
13332 if (htab->opd_abi)
13333 {
13334 if (indx < 0x8000)
13335 {
13336 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13337 p += 4;
13338 }
13339 else
13340 {
13341 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13342 p += 4;
13343 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13344 p);
13345 p += 4;
13346 }
13347 }
13348 bfd_put_32 (htab->glink->owner,
13349 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13350 indx++;
13351 p += 4;
13352 }
13353
13354 /* Build .glink global entry stubs. */
13355 if (htab->glink->size > htab->glink->rawsize)
13356 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13357 }
13358
13359 if (htab->brlt != NULL && htab->brlt->size != 0)
13360 {
13361 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13362 htab->brlt->size);
13363 if (htab->brlt->contents == NULL)
13364 return FALSE;
13365 }
13366 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13367 {
13368 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13369 htab->relbrlt->size);
13370 if (htab->relbrlt->contents == NULL)
13371 return FALSE;
13372 }
13373
13374 /* Build the stubs as directed by the stub hash table. */
13375 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13376
13377 for (group = htab->group; group != NULL; group = group->next)
13378 if (group->needs_save_res)
13379 {
13380 stub_sec = group->stub_sec;
13381 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13382 htab->sfpr->size);
13383 if (htab->params->emit_stub_syms)
13384 {
13385 unsigned int i;
13386
13387 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13388 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13389 return FALSE;
13390 }
13391 stub_sec->size += htab->sfpr->size;
13392 }
13393
13394 if (htab->relbrlt != NULL)
13395 htab->relbrlt->reloc_count = 0;
13396
13397 if (htab->params->plt_stub_align != 0)
13398 for (group = htab->group; group != NULL; group = group->next)
13399 if ((stub_sec = group->stub_sec) != NULL)
13400 stub_sec->size = ((stub_sec->size
13401 + (1 << htab->params->plt_stub_align) - 1)
13402 & -(1 << htab->params->plt_stub_align));
13403
13404 for (group = htab->group; group != NULL; group = group->next)
13405 if ((stub_sec = group->stub_sec) != NULL)
13406 {
13407 stub_sec_count += 1;
13408 if (stub_sec->rawsize != stub_sec->size
13409 && (htab->stub_iteration <= STUB_SHRINK_ITER
13410 || stub_sec->rawsize < stub_sec->size))
13411 break;
13412 }
13413
13414 if (group != NULL)
13415 {
13416 htab->stub_error = TRUE;
13417 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13418 }
13419
13420 if (htab->stub_error)
13421 return FALSE;
13422
13423 if (stats != NULL)
13424 {
13425 *stats = bfd_malloc (500);
13426 if (*stats == NULL)
13427 return FALSE;
13428
13429 sprintf (*stats, _("linker stubs in %u group%s\n"
13430 " branch %lu\n"
13431 " toc adjust %lu\n"
13432 " long branch %lu\n"
13433 " long toc adj %lu\n"
13434 " plt call %lu\n"
13435 " plt call toc %lu\n"
13436 " global entry %lu"),
13437 stub_sec_count,
13438 stub_sec_count == 1 ? "" : "s",
13439 htab->stub_count[ppc_stub_long_branch - 1],
13440 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13441 htab->stub_count[ppc_stub_plt_branch - 1],
13442 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13443 htab->stub_count[ppc_stub_plt_call - 1],
13444 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13445 htab->stub_count[ppc_stub_global_entry - 1]);
13446 }
13447 return TRUE;
13448 }
13449
13450 /* What to do when ld finds relocations against symbols defined in
13451 discarded sections. */
13452
13453 static unsigned int
13454 ppc64_elf_action_discarded (asection *sec)
13455 {
13456 if (strcmp (".opd", sec->name) == 0)
13457 return 0;
13458
13459 if (strcmp (".toc", sec->name) == 0)
13460 return 0;
13461
13462 if (strcmp (".toc1", sec->name) == 0)
13463 return 0;
13464
13465 return _bfd_elf_default_action_discarded (sec);
13466 }
13467
13468 /* The RELOCATE_SECTION function is called by the ELF backend linker
13469 to handle the relocations for a section.
13470
13471 The relocs are always passed as Rela structures; if the section
13472 actually uses Rel structures, the r_addend field will always be
13473 zero.
13474
13475 This function is responsible for adjust the section contents as
13476 necessary, and (if using Rela relocs and generating a
13477 relocatable output file) adjusting the reloc addend as
13478 necessary.
13479
13480 This function does not have to worry about setting the reloc
13481 address or the reloc symbol index.
13482
13483 LOCAL_SYMS is a pointer to the swapped in local symbols.
13484
13485 LOCAL_SECTIONS is an array giving the section in the input file
13486 corresponding to the st_shndx field of each local symbol.
13487
13488 The global hash table entry for the global symbols can be found
13489 via elf_sym_hashes (input_bfd).
13490
13491 When generating relocatable output, this function must handle
13492 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13493 going to be the section symbol corresponding to the output
13494 section, which means that the addend must be adjusted
13495 accordingly. */
13496
13497 static bfd_boolean
13498 ppc64_elf_relocate_section (bfd *output_bfd,
13499 struct bfd_link_info *info,
13500 bfd *input_bfd,
13501 asection *input_section,
13502 bfd_byte *contents,
13503 Elf_Internal_Rela *relocs,
13504 Elf_Internal_Sym *local_syms,
13505 asection **local_sections)
13506 {
13507 struct ppc_link_hash_table *htab;
13508 Elf_Internal_Shdr *symtab_hdr;
13509 struct elf_link_hash_entry **sym_hashes;
13510 Elf_Internal_Rela *rel;
13511 Elf_Internal_Rela *wrel;
13512 Elf_Internal_Rela *relend;
13513 Elf_Internal_Rela outrel;
13514 bfd_byte *loc;
13515 struct got_entry **local_got_ents;
13516 bfd_vma TOCstart;
13517 bfd_boolean ret = TRUE;
13518 bfd_boolean is_opd;
13519 /* Assume 'at' branch hints. */
13520 bfd_boolean is_isa_v2 = TRUE;
13521 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13522
13523 /* Initialize howto table if needed. */
13524 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13525 ppc_howto_init ();
13526
13527 htab = ppc_hash_table (info);
13528 if (htab == NULL)
13529 return FALSE;
13530
13531 /* Don't relocate stub sections. */
13532 if (input_section->owner == htab->params->stub_bfd)
13533 return TRUE;
13534
13535 BFD_ASSERT (is_ppc64_elf (input_bfd));
13536
13537 local_got_ents = elf_local_got_ents (input_bfd);
13538 TOCstart = elf_gp (output_bfd);
13539 symtab_hdr = &elf_symtab_hdr (input_bfd);
13540 sym_hashes = elf_sym_hashes (input_bfd);
13541 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13542
13543 rel = wrel = relocs;
13544 relend = relocs + input_section->reloc_count;
13545 for (; rel < relend; wrel++, rel++)
13546 {
13547 enum elf_ppc64_reloc_type r_type;
13548 bfd_vma addend;
13549 bfd_reloc_status_type r;
13550 Elf_Internal_Sym *sym;
13551 asection *sec;
13552 struct elf_link_hash_entry *h_elf;
13553 struct ppc_link_hash_entry *h;
13554 struct ppc_link_hash_entry *fdh;
13555 const char *sym_name;
13556 unsigned long r_symndx, toc_symndx;
13557 bfd_vma toc_addend;
13558 unsigned char tls_mask, tls_gd, tls_type;
13559 unsigned char sym_type;
13560 bfd_vma relocation;
13561 bfd_boolean unresolved_reloc;
13562 bfd_boolean warned;
13563 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13564 unsigned int insn;
13565 unsigned int mask;
13566 struct ppc_stub_hash_entry *stub_entry;
13567 bfd_vma max_br_offset;
13568 bfd_vma from;
13569 Elf_Internal_Rela orig_rel;
13570 reloc_howto_type *howto;
13571 struct reloc_howto_struct alt_howto;
13572
13573 again:
13574 orig_rel = *rel;
13575
13576 r_type = ELF64_R_TYPE (rel->r_info);
13577 r_symndx = ELF64_R_SYM (rel->r_info);
13578
13579 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13580 symbol of the previous ADDR64 reloc. The symbol gives us the
13581 proper TOC base to use. */
13582 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13583 && wrel != relocs
13584 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13585 && is_opd)
13586 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13587
13588 sym = NULL;
13589 sec = NULL;
13590 h_elf = NULL;
13591 sym_name = NULL;
13592 unresolved_reloc = FALSE;
13593 warned = FALSE;
13594
13595 if (r_symndx < symtab_hdr->sh_info)
13596 {
13597 /* It's a local symbol. */
13598 struct _opd_sec_data *opd;
13599
13600 sym = local_syms + r_symndx;
13601 sec = local_sections[r_symndx];
13602 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13603 sym_type = ELF64_ST_TYPE (sym->st_info);
13604 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13605 opd = get_opd_info (sec);
13606 if (opd != NULL && opd->adjust != NULL)
13607 {
13608 long adjust = opd->adjust[OPD_NDX (sym->st_value
13609 + rel->r_addend)];
13610 if (adjust == -1)
13611 relocation = 0;
13612 else
13613 {
13614 /* If this is a relocation against the opd section sym
13615 and we have edited .opd, adjust the reloc addend so
13616 that ld -r and ld --emit-relocs output is correct.
13617 If it is a reloc against some other .opd symbol,
13618 then the symbol value will be adjusted later. */
13619 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13620 rel->r_addend += adjust;
13621 else
13622 relocation += adjust;
13623 }
13624 }
13625 }
13626 else
13627 {
13628 bfd_boolean ignored;
13629
13630 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13631 r_symndx, symtab_hdr, sym_hashes,
13632 h_elf, sec, relocation,
13633 unresolved_reloc, warned, ignored);
13634 sym_name = h_elf->root.root.string;
13635 sym_type = h_elf->type;
13636 if (sec != NULL
13637 && sec->owner == output_bfd
13638 && strcmp (sec->name, ".opd") == 0)
13639 {
13640 /* This is a symbol defined in a linker script. All
13641 such are defined in output sections, even those
13642 defined by simple assignment from a symbol defined in
13643 an input section. Transfer the symbol to an
13644 appropriate input .opd section, so that a branch to
13645 this symbol will be mapped to the location specified
13646 by the opd entry. */
13647 struct bfd_link_order *lo;
13648 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13649 if (lo->type == bfd_indirect_link_order)
13650 {
13651 asection *isec = lo->u.indirect.section;
13652 if (h_elf->root.u.def.value >= isec->output_offset
13653 && h_elf->root.u.def.value < (isec->output_offset
13654 + isec->size))
13655 {
13656 h_elf->root.u.def.value -= isec->output_offset;
13657 h_elf->root.u.def.section = isec;
13658 sec = isec;
13659 break;
13660 }
13661 }
13662 }
13663 }
13664 h = (struct ppc_link_hash_entry *) h_elf;
13665
13666 if (sec != NULL && discarded_section (sec))
13667 {
13668 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13669 input_bfd, input_section,
13670 contents + rel->r_offset);
13671 wrel->r_offset = rel->r_offset;
13672 wrel->r_info = 0;
13673 wrel->r_addend = 0;
13674
13675 /* For ld -r, remove relocations in debug sections against
13676 sections defined in discarded sections. Not done for
13677 non-debug to preserve relocs in .eh_frame which the
13678 eh_frame editing code expects to be present. */
13679 if (bfd_link_relocatable (info)
13680 && (input_section->flags & SEC_DEBUGGING))
13681 wrel--;
13682
13683 continue;
13684 }
13685
13686 if (bfd_link_relocatable (info))
13687 goto copy_reloc;
13688
13689 if (h != NULL && &h->elf == htab->elf.hgot)
13690 {
13691 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13692 sec = bfd_abs_section_ptr;
13693 unresolved_reloc = FALSE;
13694 }
13695
13696 /* TLS optimizations. Replace instruction sequences and relocs
13697 based on information we collected in tls_optimize. We edit
13698 RELOCS so that --emit-relocs will output something sensible
13699 for the final instruction stream. */
13700 tls_mask = 0;
13701 tls_gd = 0;
13702 toc_symndx = 0;
13703 if (h != NULL)
13704 tls_mask = h->tls_mask;
13705 else if (local_got_ents != NULL)
13706 {
13707 struct plt_entry **local_plt = (struct plt_entry **)
13708 (local_got_ents + symtab_hdr->sh_info);
13709 unsigned char *lgot_masks = (unsigned char *)
13710 (local_plt + symtab_hdr->sh_info);
13711 tls_mask = lgot_masks[r_symndx];
13712 }
13713 if (tls_mask == 0
13714 && (r_type == R_PPC64_TLS
13715 || r_type == R_PPC64_TLSGD
13716 || r_type == R_PPC64_TLSLD))
13717 {
13718 /* Check for toc tls entries. */
13719 unsigned char *toc_tls;
13720
13721 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13722 &local_syms, rel, input_bfd))
13723 return FALSE;
13724
13725 if (toc_tls)
13726 tls_mask = *toc_tls;
13727 }
13728
13729 /* Check that tls relocs are used with tls syms, and non-tls
13730 relocs are used with non-tls syms. */
13731 if (r_symndx != STN_UNDEF
13732 && r_type != R_PPC64_NONE
13733 && (h == NULL
13734 || h->elf.root.type == bfd_link_hash_defined
13735 || h->elf.root.type == bfd_link_hash_defweak)
13736 && (IS_PPC64_TLS_RELOC (r_type)
13737 != (sym_type == STT_TLS
13738 || (sym_type == STT_SECTION
13739 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13740 {
13741 if (tls_mask != 0
13742 && (r_type == R_PPC64_TLS
13743 || r_type == R_PPC64_TLSGD
13744 || r_type == R_PPC64_TLSLD))
13745 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13746 ;
13747 else
13748 info->callbacks->einfo
13749 (!IS_PPC64_TLS_RELOC (r_type)
13750 /* xgettext:c-format */
13751 ? _("%H: %s used with TLS symbol `%T'\n")
13752 /* xgettext:c-format */
13753 : _("%H: %s used with non-TLS symbol `%T'\n"),
13754 input_bfd, input_section, rel->r_offset,
13755 ppc64_elf_howto_table[r_type]->name,
13756 sym_name);
13757 }
13758
13759 /* Ensure reloc mapping code below stays sane. */
13760 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13761 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13762 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13763 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13764 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13765 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13766 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13767 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13768 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13769 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13770 abort ();
13771
13772 switch (r_type)
13773 {
13774 default:
13775 break;
13776
13777 case R_PPC64_LO_DS_OPT:
13778 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13779 if ((insn & (0x3f << 26)) != 58u << 26)
13780 abort ();
13781 insn += (14u << 26) - (58u << 26);
13782 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13783 r_type = R_PPC64_TOC16_LO;
13784 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13785 break;
13786
13787 case R_PPC64_TOC16:
13788 case R_PPC64_TOC16_LO:
13789 case R_PPC64_TOC16_DS:
13790 case R_PPC64_TOC16_LO_DS:
13791 {
13792 /* Check for toc tls entries. */
13793 unsigned char *toc_tls;
13794 int retval;
13795
13796 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13797 &local_syms, rel, input_bfd);
13798 if (retval == 0)
13799 return FALSE;
13800
13801 if (toc_tls)
13802 {
13803 tls_mask = *toc_tls;
13804 if (r_type == R_PPC64_TOC16_DS
13805 || r_type == R_PPC64_TOC16_LO_DS)
13806 {
13807 if (tls_mask != 0
13808 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13809 goto toctprel;
13810 }
13811 else
13812 {
13813 /* If we found a GD reloc pair, then we might be
13814 doing a GD->IE transition. */
13815 if (retval == 2)
13816 {
13817 tls_gd = TLS_TPRELGD;
13818 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13819 goto tls_ldgd_opt;
13820 }
13821 else if (retval == 3)
13822 {
13823 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13824 goto tls_ldgd_opt;
13825 }
13826 }
13827 }
13828 }
13829 break;
13830
13831 case R_PPC64_GOT_TPREL16_HI:
13832 case R_PPC64_GOT_TPREL16_HA:
13833 if (tls_mask != 0
13834 && (tls_mask & TLS_TPREL) == 0)
13835 {
13836 rel->r_offset -= d_offset;
13837 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13838 r_type = R_PPC64_NONE;
13839 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13840 }
13841 break;
13842
13843 case R_PPC64_GOT_TPREL16_DS:
13844 case R_PPC64_GOT_TPREL16_LO_DS:
13845 if (tls_mask != 0
13846 && (tls_mask & TLS_TPREL) == 0)
13847 {
13848 toctprel:
13849 insn = bfd_get_32 (input_bfd,
13850 contents + rel->r_offset - d_offset);
13851 insn &= 31 << 21;
13852 insn |= 0x3c0d0000; /* addis 0,13,0 */
13853 bfd_put_32 (input_bfd, insn,
13854 contents + rel->r_offset - d_offset);
13855 r_type = R_PPC64_TPREL16_HA;
13856 if (toc_symndx != 0)
13857 {
13858 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13859 rel->r_addend = toc_addend;
13860 /* We changed the symbol. Start over in order to
13861 get h, sym, sec etc. right. */
13862 goto again;
13863 }
13864 else
13865 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13866 }
13867 break;
13868
13869 case R_PPC64_TLS:
13870 if (tls_mask != 0
13871 && (tls_mask & TLS_TPREL) == 0)
13872 {
13873 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13874 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13875 if (insn == 0)
13876 abort ();
13877 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13878 /* Was PPC64_TLS which sits on insn boundary, now
13879 PPC64_TPREL16_LO which is at low-order half-word. */
13880 rel->r_offset += d_offset;
13881 r_type = R_PPC64_TPREL16_LO;
13882 if (toc_symndx != 0)
13883 {
13884 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13885 rel->r_addend = toc_addend;
13886 /* We changed the symbol. Start over in order to
13887 get h, sym, sec etc. right. */
13888 goto again;
13889 }
13890 else
13891 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13892 }
13893 break;
13894
13895 case R_PPC64_GOT_TLSGD16_HI:
13896 case R_PPC64_GOT_TLSGD16_HA:
13897 tls_gd = TLS_TPRELGD;
13898 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13899 goto tls_gdld_hi;
13900 break;
13901
13902 case R_PPC64_GOT_TLSLD16_HI:
13903 case R_PPC64_GOT_TLSLD16_HA:
13904 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13905 {
13906 tls_gdld_hi:
13907 if ((tls_mask & tls_gd) != 0)
13908 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13909 + R_PPC64_GOT_TPREL16_DS);
13910 else
13911 {
13912 rel->r_offset -= d_offset;
13913 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13914 r_type = R_PPC64_NONE;
13915 }
13916 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13917 }
13918 break;
13919
13920 case R_PPC64_GOT_TLSGD16:
13921 case R_PPC64_GOT_TLSGD16_LO:
13922 tls_gd = TLS_TPRELGD;
13923 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13924 goto tls_ldgd_opt;
13925 break;
13926
13927 case R_PPC64_GOT_TLSLD16:
13928 case R_PPC64_GOT_TLSLD16_LO:
13929 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13930 {
13931 unsigned int insn1, insn2;
13932 bfd_vma offset;
13933
13934 tls_ldgd_opt:
13935 offset = (bfd_vma) -1;
13936 /* If not using the newer R_PPC64_TLSGD/LD to mark
13937 __tls_get_addr calls, we must trust that the call
13938 stays with its arg setup insns, ie. that the next
13939 reloc is the __tls_get_addr call associated with
13940 the current reloc. Edit both insns. */
13941 if (input_section->has_tls_get_addr_call
13942 && rel + 1 < relend
13943 && branch_reloc_hash_match (input_bfd, rel + 1,
13944 htab->tls_get_addr,
13945 htab->tls_get_addr_fd))
13946 offset = rel[1].r_offset;
13947 /* We read the low GOT_TLS (or TOC16) insn because we
13948 need to keep the destination reg. It may be
13949 something other than the usual r3, and moved to r3
13950 before the call by intervening code. */
13951 insn1 = bfd_get_32 (input_bfd,
13952 contents + rel->r_offset - d_offset);
13953 if ((tls_mask & tls_gd) != 0)
13954 {
13955 /* IE */
13956 insn1 &= (0x1f << 21) | (0x1f << 16);
13957 insn1 |= 58 << 26; /* ld */
13958 insn2 = 0x7c636a14; /* add 3,3,13 */
13959 if (offset != (bfd_vma) -1)
13960 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13961 if ((tls_mask & TLS_EXPLICIT) == 0)
13962 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13963 + R_PPC64_GOT_TPREL16_DS);
13964 else
13965 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13966 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13967 }
13968 else
13969 {
13970 /* LE */
13971 insn1 &= 0x1f << 21;
13972 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13973 insn2 = 0x38630000; /* addi 3,3,0 */
13974 if (tls_gd == 0)
13975 {
13976 /* Was an LD reloc. */
13977 if (toc_symndx)
13978 sec = local_sections[toc_symndx];
13979 for (r_symndx = 0;
13980 r_symndx < symtab_hdr->sh_info;
13981 r_symndx++)
13982 if (local_sections[r_symndx] == sec)
13983 break;
13984 if (r_symndx >= symtab_hdr->sh_info)
13985 r_symndx = STN_UNDEF;
13986 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13987 if (r_symndx != STN_UNDEF)
13988 rel->r_addend -= (local_syms[r_symndx].st_value
13989 + sec->output_offset
13990 + sec->output_section->vma);
13991 }
13992 else if (toc_symndx != 0)
13993 {
13994 r_symndx = toc_symndx;
13995 rel->r_addend = toc_addend;
13996 }
13997 r_type = R_PPC64_TPREL16_HA;
13998 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13999 if (offset != (bfd_vma) -1)
14000 {
14001 rel[1].r_info = ELF64_R_INFO (r_symndx,
14002 R_PPC64_TPREL16_LO);
14003 rel[1].r_offset = offset + d_offset;
14004 rel[1].r_addend = rel->r_addend;
14005 }
14006 }
14007 bfd_put_32 (input_bfd, insn1,
14008 contents + rel->r_offset - d_offset);
14009 if (offset != (bfd_vma) -1)
14010 bfd_put_32 (input_bfd, insn2, contents + offset);
14011 if ((tls_mask & tls_gd) == 0
14012 && (tls_gd == 0 || toc_symndx != 0))
14013 {
14014 /* We changed the symbol. Start over in order
14015 to get h, sym, sec etc. right. */
14016 goto again;
14017 }
14018 }
14019 break;
14020
14021 case R_PPC64_TLSGD:
14022 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
14023 {
14024 unsigned int insn2;
14025 bfd_vma offset = rel->r_offset;
14026
14027 if ((tls_mask & TLS_TPRELGD) != 0)
14028 {
14029 /* IE */
14030 r_type = R_PPC64_NONE;
14031 insn2 = 0x7c636a14; /* add 3,3,13 */
14032 }
14033 else
14034 {
14035 /* LE */
14036 if (toc_symndx != 0)
14037 {
14038 r_symndx = toc_symndx;
14039 rel->r_addend = toc_addend;
14040 }
14041 r_type = R_PPC64_TPREL16_LO;
14042 rel->r_offset = offset + d_offset;
14043 insn2 = 0x38630000; /* addi 3,3,0 */
14044 }
14045 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14046 /* Zap the reloc on the _tls_get_addr call too. */
14047 BFD_ASSERT (offset == rel[1].r_offset);
14048 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14049 bfd_put_32 (input_bfd, insn2, contents + offset);
14050 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14051 goto again;
14052 }
14053 break;
14054
14055 case R_PPC64_TLSLD:
14056 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
14057 {
14058 unsigned int insn2;
14059 bfd_vma offset = rel->r_offset;
14060
14061 if (toc_symndx)
14062 sec = local_sections[toc_symndx];
14063 for (r_symndx = 0;
14064 r_symndx < symtab_hdr->sh_info;
14065 r_symndx++)
14066 if (local_sections[r_symndx] == sec)
14067 break;
14068 if (r_symndx >= symtab_hdr->sh_info)
14069 r_symndx = STN_UNDEF;
14070 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14071 if (r_symndx != STN_UNDEF)
14072 rel->r_addend -= (local_syms[r_symndx].st_value
14073 + sec->output_offset
14074 + sec->output_section->vma);
14075
14076 r_type = R_PPC64_TPREL16_LO;
14077 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14078 rel->r_offset = offset + d_offset;
14079 /* Zap the reloc on the _tls_get_addr call too. */
14080 BFD_ASSERT (offset == rel[1].r_offset);
14081 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14082 insn2 = 0x38630000; /* addi 3,3,0 */
14083 bfd_put_32 (input_bfd, insn2, contents + offset);
14084 goto again;
14085 }
14086 break;
14087
14088 case R_PPC64_DTPMOD64:
14089 if (rel + 1 < relend
14090 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14091 && rel[1].r_offset == rel->r_offset + 8)
14092 {
14093 if ((tls_mask & TLS_GD) == 0)
14094 {
14095 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14096 if ((tls_mask & TLS_TPRELGD) != 0)
14097 r_type = R_PPC64_TPREL64;
14098 else
14099 {
14100 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14101 r_type = R_PPC64_NONE;
14102 }
14103 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14104 }
14105 }
14106 else
14107 {
14108 if ((tls_mask & TLS_LD) == 0)
14109 {
14110 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14111 r_type = R_PPC64_NONE;
14112 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14113 }
14114 }
14115 break;
14116
14117 case R_PPC64_TPREL64:
14118 if ((tls_mask & TLS_TPREL) == 0)
14119 {
14120 r_type = R_PPC64_NONE;
14121 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14122 }
14123 break;
14124
14125 case R_PPC64_ENTRY:
14126 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14127 if (!bfd_link_pic (info)
14128 && !info->traditional_format
14129 && relocation + 0x80008000 <= 0xffffffff)
14130 {
14131 unsigned int insn1, insn2;
14132
14133 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14134 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14135 if ((insn1 & ~0xfffc) == LD_R2_0R12
14136 && insn2 == ADD_R2_R2_R12)
14137 {
14138 bfd_put_32 (input_bfd,
14139 LIS_R2 + PPC_HA (relocation),
14140 contents + rel->r_offset);
14141 bfd_put_32 (input_bfd,
14142 ADDI_R2_R2 + PPC_LO (relocation),
14143 contents + rel->r_offset + 4);
14144 }
14145 }
14146 else
14147 {
14148 relocation -= (rel->r_offset
14149 + input_section->output_offset
14150 + input_section->output_section->vma);
14151 if (relocation + 0x80008000 <= 0xffffffff)
14152 {
14153 unsigned int insn1, insn2;
14154
14155 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14156 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14157 if ((insn1 & ~0xfffc) == LD_R2_0R12
14158 && insn2 == ADD_R2_R2_R12)
14159 {
14160 bfd_put_32 (input_bfd,
14161 ADDIS_R2_R12 + PPC_HA (relocation),
14162 contents + rel->r_offset);
14163 bfd_put_32 (input_bfd,
14164 ADDI_R2_R2 + PPC_LO (relocation),
14165 contents + rel->r_offset + 4);
14166 }
14167 }
14168 }
14169 break;
14170
14171 case R_PPC64_REL16_HA:
14172 /* If we are generating a non-PIC executable, edit
14173 . 0: addis 2,12,.TOC.-0b@ha
14174 . addi 2,2,.TOC.-0b@l
14175 used by ELFv2 global entry points to set up r2, to
14176 . lis 2,.TOC.@ha
14177 . addi 2,2,.TOC.@l
14178 if .TOC. is in range. */
14179 if (!bfd_link_pic (info)
14180 && !info->traditional_format
14181 && !htab->opd_abi
14182 && rel->r_addend == d_offset
14183 && h != NULL && &h->elf == htab->elf.hgot
14184 && rel + 1 < relend
14185 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14186 && rel[1].r_offset == rel->r_offset + 4
14187 && rel[1].r_addend == rel->r_addend + 4
14188 && relocation + 0x80008000 <= 0xffffffff)
14189 {
14190 unsigned int insn1, insn2;
14191 bfd_vma offset = rel->r_offset - d_offset;
14192 insn1 = bfd_get_32 (input_bfd, contents + offset);
14193 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14194 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14195 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14196 {
14197 r_type = R_PPC64_ADDR16_HA;
14198 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14199 rel->r_addend -= d_offset;
14200 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14201 rel[1].r_addend -= d_offset + 4;
14202 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14203 }
14204 }
14205 break;
14206 }
14207
14208 /* Handle other relocations that tweak non-addend part of insn. */
14209 insn = 0;
14210 max_br_offset = 1 << 25;
14211 addend = rel->r_addend;
14212 reloc_dest = DEST_NORMAL;
14213 switch (r_type)
14214 {
14215 default:
14216 break;
14217
14218 case R_PPC64_TOCSAVE:
14219 if (relocation + addend == (rel->r_offset
14220 + input_section->output_offset
14221 + input_section->output_section->vma)
14222 && tocsave_find (htab, NO_INSERT,
14223 &local_syms, rel, input_bfd))
14224 {
14225 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14226 if (insn == NOP
14227 || insn == CROR_151515 || insn == CROR_313131)
14228 bfd_put_32 (input_bfd,
14229 STD_R2_0R1 + STK_TOC (htab),
14230 contents + rel->r_offset);
14231 }
14232 break;
14233
14234 /* Branch taken prediction relocations. */
14235 case R_PPC64_ADDR14_BRTAKEN:
14236 case R_PPC64_REL14_BRTAKEN:
14237 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14238 /* Fall through. */
14239
14240 /* Branch not taken prediction relocations. */
14241 case R_PPC64_ADDR14_BRNTAKEN:
14242 case R_PPC64_REL14_BRNTAKEN:
14243 insn |= bfd_get_32 (input_bfd,
14244 contents + rel->r_offset) & ~(0x01 << 21);
14245 /* Fall through. */
14246
14247 case R_PPC64_REL14:
14248 max_br_offset = 1 << 15;
14249 /* Fall through. */
14250
14251 case R_PPC64_REL24:
14252 /* Calls to functions with a different TOC, such as calls to
14253 shared objects, need to alter the TOC pointer. This is
14254 done using a linkage stub. A REL24 branching to these
14255 linkage stubs needs to be followed by a nop, as the nop
14256 will be replaced with an instruction to restore the TOC
14257 base pointer. */
14258 fdh = h;
14259 if (h != NULL
14260 && h->oh != NULL
14261 && h->oh->is_func_descriptor)
14262 fdh = ppc_follow_link (h->oh);
14263 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14264 htab);
14265 if (stub_entry != NULL
14266 && (stub_entry->stub_type == ppc_stub_plt_call
14267 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14268 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14269 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14270 {
14271 bfd_boolean can_plt_call = FALSE;
14272
14273 if (stub_entry->stub_type == ppc_stub_plt_call
14274 && !htab->opd_abi
14275 && htab->params->plt_localentry0 != 0
14276 && is_elfv2_localentry0 (&h->elf))
14277 {
14278 /* The function doesn't use or change r2. */
14279 can_plt_call = TRUE;
14280 }
14281
14282 /* All of these stubs may modify r2, so there must be a
14283 branch and link followed by a nop. The nop is
14284 replaced by an insn to restore r2. */
14285 else if (rel->r_offset + 8 <= input_section->size)
14286 {
14287 unsigned long br;
14288
14289 br = bfd_get_32 (input_bfd,
14290 contents + rel->r_offset);
14291 if ((br & 1) != 0)
14292 {
14293 unsigned long nop;
14294
14295 nop = bfd_get_32 (input_bfd,
14296 contents + rel->r_offset + 4);
14297 if (nop == NOP
14298 || nop == CROR_151515 || nop == CROR_313131)
14299 {
14300 if (h != NULL
14301 && (h == htab->tls_get_addr_fd
14302 || h == htab->tls_get_addr)
14303 && htab->params->tls_get_addr_opt)
14304 {
14305 /* Special stub used, leave nop alone. */
14306 }
14307 else
14308 bfd_put_32 (input_bfd,
14309 LD_R2_0R1 + STK_TOC (htab),
14310 contents + rel->r_offset + 4);
14311 can_plt_call = TRUE;
14312 }
14313 }
14314 }
14315
14316 if (!can_plt_call && h != NULL)
14317 {
14318 const char *name = h->elf.root.root.string;
14319
14320 if (*name == '.')
14321 ++name;
14322
14323 if (strncmp (name, "__libc_start_main", 17) == 0
14324 && (name[17] == 0 || name[17] == '@'))
14325 {
14326 /* Allow crt1 branch to go via a toc adjusting
14327 stub. Other calls that never return could do
14328 the same, if we could detect such. */
14329 can_plt_call = TRUE;
14330 }
14331 }
14332
14333 if (!can_plt_call)
14334 {
14335 /* g++ as of 20130507 emits self-calls without a
14336 following nop. This is arguably wrong since we
14337 have conflicting information. On the one hand a
14338 global symbol and on the other a local call
14339 sequence, but don't error for this special case.
14340 It isn't possible to cheaply verify we have
14341 exactly such a call. Allow all calls to the same
14342 section. */
14343 asection *code_sec = sec;
14344
14345 if (get_opd_info (sec) != NULL)
14346 {
14347 bfd_vma off = (relocation + addend
14348 - sec->output_section->vma
14349 - sec->output_offset);
14350
14351 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14352 }
14353 if (code_sec == input_section)
14354 can_plt_call = TRUE;
14355 }
14356
14357 if (!can_plt_call)
14358 {
14359 if (stub_entry->stub_type == ppc_stub_plt_call
14360 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14361 info->callbacks->einfo
14362 /* xgettext:c-format */
14363 (_("%H: call to `%T' lacks nop, can't restore toc; "
14364 "recompile with -fPIC\n"),
14365 input_bfd, input_section, rel->r_offset, sym_name);
14366 else
14367 info->callbacks->einfo
14368 /* xgettext:c-format */
14369 (_("%H: call to `%T' lacks nop, can't restore toc; "
14370 "(-mcmodel=small toc adjust stub)\n"),
14371 input_bfd, input_section, rel->r_offset, sym_name);
14372
14373 bfd_set_error (bfd_error_bad_value);
14374 ret = FALSE;
14375 }
14376
14377 if (can_plt_call
14378 && (stub_entry->stub_type == ppc_stub_plt_call
14379 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14380 unresolved_reloc = FALSE;
14381 }
14382
14383 if ((stub_entry == NULL
14384 || stub_entry->stub_type == ppc_stub_long_branch
14385 || stub_entry->stub_type == ppc_stub_plt_branch)
14386 && get_opd_info (sec) != NULL)
14387 {
14388 /* The branch destination is the value of the opd entry. */
14389 bfd_vma off = (relocation + addend
14390 - sec->output_section->vma
14391 - sec->output_offset);
14392 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14393 if (dest != (bfd_vma) -1)
14394 {
14395 relocation = dest;
14396 addend = 0;
14397 reloc_dest = DEST_OPD;
14398 }
14399 }
14400
14401 /* If the branch is out of reach we ought to have a long
14402 branch stub. */
14403 from = (rel->r_offset
14404 + input_section->output_offset
14405 + input_section->output_section->vma);
14406
14407 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14408 ? fdh->elf.other
14409 : sym->st_other);
14410
14411 if (stub_entry != NULL
14412 && (stub_entry->stub_type == ppc_stub_long_branch
14413 || stub_entry->stub_type == ppc_stub_plt_branch)
14414 && (r_type == R_PPC64_ADDR14_BRTAKEN
14415 || r_type == R_PPC64_ADDR14_BRNTAKEN
14416 || (relocation + addend - from + max_br_offset
14417 < 2 * max_br_offset)))
14418 /* Don't use the stub if this branch is in range. */
14419 stub_entry = NULL;
14420
14421 if (stub_entry != NULL)
14422 {
14423 /* Munge up the value and addend so that we call the stub
14424 rather than the procedure directly. */
14425 asection *stub_sec = stub_entry->group->stub_sec;
14426
14427 if (stub_entry->stub_type == ppc_stub_save_res)
14428 relocation += (stub_sec->output_offset
14429 + stub_sec->output_section->vma
14430 + stub_sec->size - htab->sfpr->size
14431 - htab->sfpr->output_offset
14432 - htab->sfpr->output_section->vma);
14433 else
14434 relocation = (stub_entry->stub_offset
14435 + stub_sec->output_offset
14436 + stub_sec->output_section->vma);
14437 addend = 0;
14438 reloc_dest = DEST_STUB;
14439
14440 if ((stub_entry->stub_type == ppc_stub_plt_call
14441 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14442 && (ALWAYS_EMIT_R2SAVE
14443 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14444 && rel + 1 < relend
14445 && rel[1].r_offset == rel->r_offset + 4
14446 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14447 relocation += 4;
14448 }
14449
14450 if (insn != 0)
14451 {
14452 if (is_isa_v2)
14453 {
14454 /* Set 'a' bit. This is 0b00010 in BO field for branch
14455 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14456 for branch on CTR insns (BO == 1a00t or 1a01t). */
14457 if ((insn & (0x14 << 21)) == (0x04 << 21))
14458 insn |= 0x02 << 21;
14459 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14460 insn |= 0x08 << 21;
14461 else
14462 break;
14463 }
14464 else
14465 {
14466 /* Invert 'y' bit if not the default. */
14467 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14468 insn ^= 0x01 << 21;
14469 }
14470
14471 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14472 }
14473
14474 /* NOP out calls to undefined weak functions.
14475 We can thus call a weak function without first
14476 checking whether the function is defined. */
14477 else if (h != NULL
14478 && h->elf.root.type == bfd_link_hash_undefweak
14479 && h->elf.dynindx == -1
14480 && r_type == R_PPC64_REL24
14481 && relocation == 0
14482 && addend == 0)
14483 {
14484 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14485 goto copy_reloc;
14486 }
14487 break;
14488 }
14489
14490 /* Set `addend'. */
14491 tls_type = 0;
14492 switch (r_type)
14493 {
14494 default:
14495 info->callbacks->einfo
14496 /* xgettext:c-format */
14497 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14498 input_bfd, (int) r_type, sym_name);
14499
14500 bfd_set_error (bfd_error_bad_value);
14501 ret = FALSE;
14502 goto copy_reloc;
14503
14504 case R_PPC64_NONE:
14505 case R_PPC64_TLS:
14506 case R_PPC64_TLSGD:
14507 case R_PPC64_TLSLD:
14508 case R_PPC64_TOCSAVE:
14509 case R_PPC64_GNU_VTINHERIT:
14510 case R_PPC64_GNU_VTENTRY:
14511 case R_PPC64_ENTRY:
14512 goto copy_reloc;
14513
14514 /* GOT16 relocations. Like an ADDR16 using the symbol's
14515 address in the GOT as relocation value instead of the
14516 symbol's value itself. Also, create a GOT entry for the
14517 symbol and put the symbol value there. */
14518 case R_PPC64_GOT_TLSGD16:
14519 case R_PPC64_GOT_TLSGD16_LO:
14520 case R_PPC64_GOT_TLSGD16_HI:
14521 case R_PPC64_GOT_TLSGD16_HA:
14522 tls_type = TLS_TLS | TLS_GD;
14523 goto dogot;
14524
14525 case R_PPC64_GOT_TLSLD16:
14526 case R_PPC64_GOT_TLSLD16_LO:
14527 case R_PPC64_GOT_TLSLD16_HI:
14528 case R_PPC64_GOT_TLSLD16_HA:
14529 tls_type = TLS_TLS | TLS_LD;
14530 goto dogot;
14531
14532 case R_PPC64_GOT_TPREL16_DS:
14533 case R_PPC64_GOT_TPREL16_LO_DS:
14534 case R_PPC64_GOT_TPREL16_HI:
14535 case R_PPC64_GOT_TPREL16_HA:
14536 tls_type = TLS_TLS | TLS_TPREL;
14537 goto dogot;
14538
14539 case R_PPC64_GOT_DTPREL16_DS:
14540 case R_PPC64_GOT_DTPREL16_LO_DS:
14541 case R_PPC64_GOT_DTPREL16_HI:
14542 case R_PPC64_GOT_DTPREL16_HA:
14543 tls_type = TLS_TLS | TLS_DTPREL;
14544 goto dogot;
14545
14546 case R_PPC64_GOT16:
14547 case R_PPC64_GOT16_LO:
14548 case R_PPC64_GOT16_HI:
14549 case R_PPC64_GOT16_HA:
14550 case R_PPC64_GOT16_DS:
14551 case R_PPC64_GOT16_LO_DS:
14552 dogot:
14553 {
14554 /* Relocation is to the entry for this symbol in the global
14555 offset table. */
14556 asection *got;
14557 bfd_vma *offp;
14558 bfd_vma off;
14559 unsigned long indx = 0;
14560 struct got_entry *ent;
14561
14562 if (tls_type == (TLS_TLS | TLS_LD)
14563 && (h == NULL
14564 || !h->elf.def_dynamic))
14565 ent = ppc64_tlsld_got (input_bfd);
14566 else
14567 {
14568 if (h != NULL)
14569 {
14570 if (!htab->elf.dynamic_sections_created
14571 || h->elf.dynindx == -1
14572 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14573 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14574 /* This is actually a static link, or it is a
14575 -Bsymbolic link and the symbol is defined
14576 locally, or the symbol was forced to be local
14577 because of a version file. */
14578 ;
14579 else
14580 {
14581 indx = h->elf.dynindx;
14582 unresolved_reloc = FALSE;
14583 }
14584 ent = h->elf.got.glist;
14585 }
14586 else
14587 {
14588 if (local_got_ents == NULL)
14589 abort ();
14590 ent = local_got_ents[r_symndx];
14591 }
14592
14593 for (; ent != NULL; ent = ent->next)
14594 if (ent->addend == orig_rel.r_addend
14595 && ent->owner == input_bfd
14596 && ent->tls_type == tls_type)
14597 break;
14598 }
14599
14600 if (ent == NULL)
14601 abort ();
14602 if (ent->is_indirect)
14603 ent = ent->got.ent;
14604 offp = &ent->got.offset;
14605 got = ppc64_elf_tdata (ent->owner)->got;
14606 if (got == NULL)
14607 abort ();
14608
14609 /* The offset must always be a multiple of 8. We use the
14610 least significant bit to record whether we have already
14611 processed this entry. */
14612 off = *offp;
14613 if ((off & 1) != 0)
14614 off &= ~1;
14615 else
14616 {
14617 /* Generate relocs for the dynamic linker, except in
14618 the case of TLSLD where we'll use one entry per
14619 module. */
14620 asection *relgot;
14621 bfd_boolean ifunc;
14622
14623 *offp = off | 1;
14624 relgot = NULL;
14625 ifunc = (h != NULL
14626 ? h->elf.type == STT_GNU_IFUNC
14627 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14628 if (ifunc)
14629 {
14630 relgot = htab->elf.irelplt;
14631 if (indx == 0)
14632 htab->local_ifunc_resolver = 1;
14633 else if (is_static_defined (&h->elf))
14634 htab->maybe_local_ifunc_resolver = 1;
14635 }
14636 else if (indx != 0
14637 || (bfd_link_pic (info)
14638 && (h == NULL
14639 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14640 || (tls_type == (TLS_TLS | TLS_LD)
14641 && !h->elf.def_dynamic))))
14642 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14643 if (relgot != NULL)
14644 {
14645 outrel.r_offset = (got->output_section->vma
14646 + got->output_offset
14647 + off);
14648 outrel.r_addend = addend;
14649 if (tls_type & (TLS_LD | TLS_GD))
14650 {
14651 outrel.r_addend = 0;
14652 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14653 if (tls_type == (TLS_TLS | TLS_GD))
14654 {
14655 loc = relgot->contents;
14656 loc += (relgot->reloc_count++
14657 * sizeof (Elf64_External_Rela));
14658 bfd_elf64_swap_reloca_out (output_bfd,
14659 &outrel, loc);
14660 outrel.r_offset += 8;
14661 outrel.r_addend = addend;
14662 outrel.r_info
14663 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14664 }
14665 }
14666 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14667 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14668 else if (tls_type == (TLS_TLS | TLS_TPREL))
14669 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14670 else if (indx != 0)
14671 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14672 else
14673 {
14674 if (ifunc)
14675 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14676 else
14677 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14678
14679 /* Write the .got section contents for the sake
14680 of prelink. */
14681 loc = got->contents + off;
14682 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14683 loc);
14684 }
14685
14686 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14687 {
14688 outrel.r_addend += relocation;
14689 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14690 {
14691 if (htab->elf.tls_sec == NULL)
14692 outrel.r_addend = 0;
14693 else
14694 outrel.r_addend -= htab->elf.tls_sec->vma;
14695 }
14696 }
14697 loc = relgot->contents;
14698 loc += (relgot->reloc_count++
14699 * sizeof (Elf64_External_Rela));
14700 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14701 }
14702
14703 /* Init the .got section contents here if we're not
14704 emitting a reloc. */
14705 else
14706 {
14707 relocation += addend;
14708 if (tls_type != 0)
14709 {
14710 if (htab->elf.tls_sec == NULL)
14711 relocation = 0;
14712 else
14713 {
14714 if (tls_type & TLS_LD)
14715 relocation = 0;
14716 else
14717 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14718 if (tls_type & TLS_TPREL)
14719 relocation += DTP_OFFSET - TP_OFFSET;
14720 }
14721
14722 if (tls_type & (TLS_GD | TLS_LD))
14723 {
14724 bfd_put_64 (output_bfd, relocation,
14725 got->contents + off + 8);
14726 relocation = 1;
14727 }
14728 }
14729 bfd_put_64 (output_bfd, relocation,
14730 got->contents + off);
14731 }
14732 }
14733
14734 if (off >= (bfd_vma) -2)
14735 abort ();
14736
14737 relocation = got->output_section->vma + got->output_offset + off;
14738 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14739 }
14740 break;
14741
14742 case R_PPC64_PLT16_HA:
14743 case R_PPC64_PLT16_HI:
14744 case R_PPC64_PLT16_LO:
14745 case R_PPC64_PLT32:
14746 case R_PPC64_PLT64:
14747 /* Relocation is to the entry for this symbol in the
14748 procedure linkage table. */
14749 {
14750 struct plt_entry **plt_list = NULL;
14751 if (h != NULL)
14752 plt_list = &h->elf.plt.plist;
14753 else if (local_got_ents != NULL)
14754 {
14755 struct plt_entry **local_plt = (struct plt_entry **)
14756 (local_got_ents + symtab_hdr->sh_info);
14757 unsigned char *local_got_tls_masks = (unsigned char *)
14758 (local_plt + symtab_hdr->sh_info);
14759 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14760 plt_list = local_plt + r_symndx;
14761 }
14762 if (plt_list)
14763 {
14764 struct plt_entry *ent;
14765
14766 for (ent = *plt_list; ent != NULL; ent = ent->next)
14767 if (ent->plt.offset != (bfd_vma) -1
14768 && ent->addend == orig_rel.r_addend)
14769 {
14770 asection *plt;
14771
14772 plt = htab->elf.splt;
14773 if (!htab->elf.dynamic_sections_created
14774 || h == NULL
14775 || h->elf.dynindx == -1)
14776 plt = htab->elf.iplt;
14777 relocation = (plt->output_section->vma
14778 + plt->output_offset
14779 + ent->plt.offset);
14780 addend = 0;
14781 unresolved_reloc = FALSE;
14782 break;
14783 }
14784 }
14785 }
14786 break;
14787
14788 case R_PPC64_TOC:
14789 /* Relocation value is TOC base. */
14790 relocation = TOCstart;
14791 if (r_symndx == STN_UNDEF)
14792 relocation += htab->sec_info[input_section->id].toc_off;
14793 else if (unresolved_reloc)
14794 ;
14795 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14796 relocation += htab->sec_info[sec->id].toc_off;
14797 else
14798 unresolved_reloc = TRUE;
14799 goto dodyn;
14800
14801 /* TOC16 relocs. We want the offset relative to the TOC base,
14802 which is the address of the start of the TOC plus 0x8000.
14803 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14804 in this order. */
14805 case R_PPC64_TOC16:
14806 case R_PPC64_TOC16_LO:
14807 case R_PPC64_TOC16_HI:
14808 case R_PPC64_TOC16_DS:
14809 case R_PPC64_TOC16_LO_DS:
14810 case R_PPC64_TOC16_HA:
14811 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14812 break;
14813
14814 /* Relocate against the beginning of the section. */
14815 case R_PPC64_SECTOFF:
14816 case R_PPC64_SECTOFF_LO:
14817 case R_PPC64_SECTOFF_HI:
14818 case R_PPC64_SECTOFF_DS:
14819 case R_PPC64_SECTOFF_LO_DS:
14820 case R_PPC64_SECTOFF_HA:
14821 if (sec != NULL)
14822 addend -= sec->output_section->vma;
14823 break;
14824
14825 case R_PPC64_REL16:
14826 case R_PPC64_REL16_LO:
14827 case R_PPC64_REL16_HI:
14828 case R_PPC64_REL16_HA:
14829 case R_PPC64_REL16DX_HA:
14830 break;
14831
14832 case R_PPC64_REL14:
14833 case R_PPC64_REL14_BRNTAKEN:
14834 case R_PPC64_REL14_BRTAKEN:
14835 case R_PPC64_REL24:
14836 break;
14837
14838 case R_PPC64_TPREL16:
14839 case R_PPC64_TPREL16_LO:
14840 case R_PPC64_TPREL16_HI:
14841 case R_PPC64_TPREL16_HA:
14842 case R_PPC64_TPREL16_DS:
14843 case R_PPC64_TPREL16_LO_DS:
14844 case R_PPC64_TPREL16_HIGH:
14845 case R_PPC64_TPREL16_HIGHA:
14846 case R_PPC64_TPREL16_HIGHER:
14847 case R_PPC64_TPREL16_HIGHERA:
14848 case R_PPC64_TPREL16_HIGHEST:
14849 case R_PPC64_TPREL16_HIGHESTA:
14850 if (h != NULL
14851 && h->elf.root.type == bfd_link_hash_undefweak
14852 && h->elf.dynindx == -1)
14853 {
14854 /* Make this relocation against an undefined weak symbol
14855 resolve to zero. This is really just a tweak, since
14856 code using weak externs ought to check that they are
14857 defined before using them. */
14858 bfd_byte *p = contents + rel->r_offset - d_offset;
14859
14860 insn = bfd_get_32 (input_bfd, p);
14861 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14862 if (insn != 0)
14863 bfd_put_32 (input_bfd, insn, p);
14864 break;
14865 }
14866 if (htab->elf.tls_sec != NULL)
14867 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14868 /* The TPREL16 relocs shouldn't really be used in shared
14869 libs or with non-local symbols as that will result in
14870 DT_TEXTREL being set, but support them anyway. */
14871 goto dodyn;
14872
14873 case R_PPC64_DTPREL16:
14874 case R_PPC64_DTPREL16_LO:
14875 case R_PPC64_DTPREL16_HI:
14876 case R_PPC64_DTPREL16_HA:
14877 case R_PPC64_DTPREL16_DS:
14878 case R_PPC64_DTPREL16_LO_DS:
14879 case R_PPC64_DTPREL16_HIGH:
14880 case R_PPC64_DTPREL16_HIGHA:
14881 case R_PPC64_DTPREL16_HIGHER:
14882 case R_PPC64_DTPREL16_HIGHERA:
14883 case R_PPC64_DTPREL16_HIGHEST:
14884 case R_PPC64_DTPREL16_HIGHESTA:
14885 if (htab->elf.tls_sec != NULL)
14886 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14887 break;
14888
14889 case R_PPC64_ADDR64_LOCAL:
14890 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14891 ? h->elf.other
14892 : sym->st_other);
14893 break;
14894
14895 case R_PPC64_DTPMOD64:
14896 relocation = 1;
14897 addend = 0;
14898 goto dodyn;
14899
14900 case R_PPC64_TPREL64:
14901 if (htab->elf.tls_sec != NULL)
14902 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14903 goto dodyn;
14904
14905 case R_PPC64_DTPREL64:
14906 if (htab->elf.tls_sec != NULL)
14907 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14908 /* Fall through. */
14909
14910 /* Relocations that may need to be propagated if this is a
14911 dynamic object. */
14912 case R_PPC64_REL30:
14913 case R_PPC64_REL32:
14914 case R_PPC64_REL64:
14915 case R_PPC64_ADDR14:
14916 case R_PPC64_ADDR14_BRNTAKEN:
14917 case R_PPC64_ADDR14_BRTAKEN:
14918 case R_PPC64_ADDR16:
14919 case R_PPC64_ADDR16_DS:
14920 case R_PPC64_ADDR16_HA:
14921 case R_PPC64_ADDR16_HI:
14922 case R_PPC64_ADDR16_HIGH:
14923 case R_PPC64_ADDR16_HIGHA:
14924 case R_PPC64_ADDR16_HIGHER:
14925 case R_PPC64_ADDR16_HIGHERA:
14926 case R_PPC64_ADDR16_HIGHEST:
14927 case R_PPC64_ADDR16_HIGHESTA:
14928 case R_PPC64_ADDR16_LO:
14929 case R_PPC64_ADDR16_LO_DS:
14930 case R_PPC64_ADDR24:
14931 case R_PPC64_ADDR32:
14932 case R_PPC64_ADDR64:
14933 case R_PPC64_UADDR16:
14934 case R_PPC64_UADDR32:
14935 case R_PPC64_UADDR64:
14936 dodyn:
14937 if ((input_section->flags & SEC_ALLOC) == 0)
14938 break;
14939
14940 if (NO_OPD_RELOCS && is_opd)
14941 break;
14942
14943 if (bfd_link_pic (info)
14944 ? ((h == NULL
14945 || h->dyn_relocs != NULL)
14946 && ((h != NULL && pc_dynrelocs (h))
14947 || must_be_dyn_reloc (info, r_type)))
14948 : (h != NULL
14949 ? h->dyn_relocs != NULL
14950 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14951 {
14952 bfd_boolean skip, relocate;
14953 asection *sreloc;
14954 bfd_vma out_off;
14955 long indx = 0;
14956
14957 /* When generating a dynamic object, these relocations
14958 are copied into the output file to be resolved at run
14959 time. */
14960
14961 skip = FALSE;
14962 relocate = FALSE;
14963
14964 out_off = _bfd_elf_section_offset (output_bfd, info,
14965 input_section, rel->r_offset);
14966 if (out_off == (bfd_vma) -1)
14967 skip = TRUE;
14968 else if (out_off == (bfd_vma) -2)
14969 skip = TRUE, relocate = TRUE;
14970 out_off += (input_section->output_section->vma
14971 + input_section->output_offset);
14972 outrel.r_offset = out_off;
14973 outrel.r_addend = rel->r_addend;
14974
14975 /* Optimize unaligned reloc use. */
14976 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14977 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14978 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14979 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14980 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14981 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14982 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14983 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14984 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14985
14986 if (skip)
14987 memset (&outrel, 0, sizeof outrel);
14988 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14989 && !is_opd
14990 && r_type != R_PPC64_TOC)
14991 {
14992 indx = h->elf.dynindx;
14993 BFD_ASSERT (indx != -1);
14994 outrel.r_info = ELF64_R_INFO (indx, r_type);
14995 }
14996 else
14997 {
14998 /* This symbol is local, or marked to become local,
14999 or this is an opd section reloc which must point
15000 at a local function. */
15001 outrel.r_addend += relocation;
15002 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
15003 {
15004 if (is_opd && h != NULL)
15005 {
15006 /* Lie about opd entries. This case occurs
15007 when building shared libraries and we
15008 reference a function in another shared
15009 lib. The same thing happens for a weak
15010 definition in an application that's
15011 overridden by a strong definition in a
15012 shared lib. (I believe this is a generic
15013 bug in binutils handling of weak syms.)
15014 In these cases we won't use the opd
15015 entry in this lib. */
15016 unresolved_reloc = FALSE;
15017 }
15018 if (!is_opd
15019 && r_type == R_PPC64_ADDR64
15020 && (h != NULL
15021 ? h->elf.type == STT_GNU_IFUNC
15022 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15023 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15024 else
15025 {
15026 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15027
15028 /* We need to relocate .opd contents for ld.so.
15029 Prelink also wants simple and consistent rules
15030 for relocs. This make all RELATIVE relocs have
15031 *r_offset equal to r_addend. */
15032 relocate = TRUE;
15033 }
15034 }
15035 else
15036 {
15037 if (h != NULL
15038 ? h->elf.type == STT_GNU_IFUNC
15039 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15040 {
15041 info->callbacks->einfo
15042 /* xgettext:c-format */
15043 (_("%H: %s for indirect "
15044 "function `%T' unsupported\n"),
15045 input_bfd, input_section, rel->r_offset,
15046 ppc64_elf_howto_table[r_type]->name,
15047 sym_name);
15048 ret = FALSE;
15049 }
15050 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15051 ;
15052 else if (sec == NULL || sec->owner == NULL)
15053 {
15054 bfd_set_error (bfd_error_bad_value);
15055 return FALSE;
15056 }
15057 else
15058 {
15059 asection *osec;
15060
15061 osec = sec->output_section;
15062 indx = elf_section_data (osec)->dynindx;
15063
15064 if (indx == 0)
15065 {
15066 if ((osec->flags & SEC_READONLY) == 0
15067 && htab->elf.data_index_section != NULL)
15068 osec = htab->elf.data_index_section;
15069 else
15070 osec = htab->elf.text_index_section;
15071 indx = elf_section_data (osec)->dynindx;
15072 }
15073 BFD_ASSERT (indx != 0);
15074
15075 /* We are turning this relocation into one
15076 against a section symbol, so subtract out
15077 the output section's address but not the
15078 offset of the input section in the output
15079 section. */
15080 outrel.r_addend -= osec->vma;
15081 }
15082
15083 outrel.r_info = ELF64_R_INFO (indx, r_type);
15084 }
15085 }
15086
15087 sreloc = elf_section_data (input_section)->sreloc;
15088 if (h != NULL
15089 ? h->elf.type == STT_GNU_IFUNC
15090 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15091 {
15092 sreloc = htab->elf.irelplt;
15093 if (indx == 0)
15094 htab->local_ifunc_resolver = 1;
15095 else if (is_static_defined (&h->elf))
15096 htab->maybe_local_ifunc_resolver = 1;
15097 }
15098 if (sreloc == NULL)
15099 abort ();
15100
15101 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15102 >= sreloc->size)
15103 abort ();
15104 loc = sreloc->contents;
15105 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15106 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15107
15108 /* If this reloc is against an external symbol, it will
15109 be computed at runtime, so there's no need to do
15110 anything now. However, for the sake of prelink ensure
15111 that the section contents are a known value. */
15112 if (! relocate)
15113 {
15114 unresolved_reloc = FALSE;
15115 /* The value chosen here is quite arbitrary as ld.so
15116 ignores section contents except for the special
15117 case of .opd where the contents might be accessed
15118 before relocation. Choose zero, as that won't
15119 cause reloc overflow. */
15120 relocation = 0;
15121 addend = 0;
15122 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15123 to improve backward compatibility with older
15124 versions of ld. */
15125 if (r_type == R_PPC64_ADDR64)
15126 addend = outrel.r_addend;
15127 /* Adjust pc_relative relocs to have zero in *r_offset. */
15128 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15129 addend = outrel.r_offset;
15130 }
15131 }
15132 break;
15133
15134 case R_PPC64_COPY:
15135 case R_PPC64_GLOB_DAT:
15136 case R_PPC64_JMP_SLOT:
15137 case R_PPC64_JMP_IREL:
15138 case R_PPC64_RELATIVE:
15139 /* We shouldn't ever see these dynamic relocs in relocatable
15140 files. */
15141 /* Fall through. */
15142
15143 case R_PPC64_PLTGOT16:
15144 case R_PPC64_PLTGOT16_DS:
15145 case R_PPC64_PLTGOT16_HA:
15146 case R_PPC64_PLTGOT16_HI:
15147 case R_PPC64_PLTGOT16_LO:
15148 case R_PPC64_PLTGOT16_LO_DS:
15149 case R_PPC64_PLTREL32:
15150 case R_PPC64_PLTREL64:
15151 /* These ones haven't been implemented yet. */
15152
15153 info->callbacks->einfo
15154 /* xgettext:c-format */
15155 (_("%P: %B: %s is not supported for `%T'\n"),
15156 input_bfd,
15157 ppc64_elf_howto_table[r_type]->name, sym_name);
15158
15159 bfd_set_error (bfd_error_invalid_operation);
15160 ret = FALSE;
15161 goto copy_reloc;
15162 }
15163
15164 /* Multi-instruction sequences that access the TOC can be
15165 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15166 to nop; addi rb,r2,x; */
15167 howto = ppc64_elf_howto_table[(int) r_type];
15168 switch (r_type)
15169 {
15170 default:
15171 break;
15172
15173 case R_PPC64_GOT_TLSLD16_HI:
15174 case R_PPC64_GOT_TLSGD16_HI:
15175 case R_PPC64_GOT_TPREL16_HI:
15176 case R_PPC64_GOT_DTPREL16_HI:
15177 case R_PPC64_GOT16_HI:
15178 case R_PPC64_TOC16_HI:
15179 /* These relocs would only be useful if building up an
15180 offset to later add to r2, perhaps in an indexed
15181 addressing mode instruction. Don't try to optimize.
15182 Unfortunately, the possibility of someone building up an
15183 offset like this or even with the HA relocs, means that
15184 we need to check the high insn when optimizing the low
15185 insn. */
15186 break;
15187
15188 case R_PPC64_GOT_TLSLD16_HA:
15189 case R_PPC64_GOT_TLSGD16_HA:
15190 case R_PPC64_GOT_TPREL16_HA:
15191 case R_PPC64_GOT_DTPREL16_HA:
15192 case R_PPC64_GOT16_HA:
15193 case R_PPC64_TOC16_HA:
15194 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15195 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15196 {
15197 bfd_byte *p = contents + (rel->r_offset & ~3);
15198 bfd_put_32 (input_bfd, NOP, p);
15199 }
15200 break;
15201
15202 case R_PPC64_GOT_TLSLD16_LO:
15203 case R_PPC64_GOT_TLSGD16_LO:
15204 case R_PPC64_GOT_TPREL16_LO_DS:
15205 case R_PPC64_GOT_DTPREL16_LO_DS:
15206 case R_PPC64_GOT16_LO:
15207 case R_PPC64_GOT16_LO_DS:
15208 case R_PPC64_TOC16_LO:
15209 case R_PPC64_TOC16_LO_DS:
15210 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15211 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15212 {
15213 bfd_byte *p = contents + (rel->r_offset & ~3);
15214 insn = bfd_get_32 (input_bfd, p);
15215 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15216 {
15217 /* Transform addic to addi when we change reg. */
15218 insn &= ~((0x3f << 26) | (0x1f << 16));
15219 insn |= (14u << 26) | (2 << 16);
15220 }
15221 else
15222 {
15223 insn &= ~(0x1f << 16);
15224 insn |= 2 << 16;
15225 }
15226 bfd_put_32 (input_bfd, insn, p);
15227 }
15228 break;
15229
15230 case R_PPC64_TPREL16_HA:
15231 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15232 {
15233 bfd_byte *p = contents + (rel->r_offset & ~3);
15234 insn = bfd_get_32 (input_bfd, p);
15235 if ((insn & ((0x3f << 26) | 0x1f << 16))
15236 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15237 /* xgettext:c-format */
15238 info->callbacks->minfo
15239 (_("%H: warning: %s unexpected insn %#x.\n"),
15240 input_bfd, input_section, rel->r_offset, howto->name, insn);
15241 else
15242 bfd_put_32 (input_bfd, NOP, p);
15243 }
15244 break;
15245
15246 case R_PPC64_TPREL16_LO:
15247 case R_PPC64_TPREL16_LO_DS:
15248 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15249 {
15250 bfd_byte *p = contents + (rel->r_offset & ~3);
15251 insn = bfd_get_32 (input_bfd, p);
15252 insn &= ~(0x1f << 16);
15253 insn |= 13 << 16;
15254 bfd_put_32 (input_bfd, insn, p);
15255 }
15256 break;
15257 }
15258
15259 /* Do any further special processing. */
15260 switch (r_type)
15261 {
15262 default:
15263 break;
15264
15265 case R_PPC64_REL16_HA:
15266 case R_PPC64_REL16DX_HA:
15267 case R_PPC64_ADDR16_HA:
15268 case R_PPC64_ADDR16_HIGHA:
15269 case R_PPC64_ADDR16_HIGHERA:
15270 case R_PPC64_ADDR16_HIGHESTA:
15271 case R_PPC64_TOC16_HA:
15272 case R_PPC64_SECTOFF_HA:
15273 case R_PPC64_TPREL16_HA:
15274 case R_PPC64_TPREL16_HIGHA:
15275 case R_PPC64_TPREL16_HIGHERA:
15276 case R_PPC64_TPREL16_HIGHESTA:
15277 case R_PPC64_DTPREL16_HA:
15278 case R_PPC64_DTPREL16_HIGHA:
15279 case R_PPC64_DTPREL16_HIGHERA:
15280 case R_PPC64_DTPREL16_HIGHESTA:
15281 /* It's just possible that this symbol is a weak symbol
15282 that's not actually defined anywhere. In that case,
15283 'sec' would be NULL, and we should leave the symbol
15284 alone (it will be set to zero elsewhere in the link). */
15285 if (sec == NULL)
15286 break;
15287 /* Fall through. */
15288
15289 case R_PPC64_GOT16_HA:
15290 case R_PPC64_PLTGOT16_HA:
15291 case R_PPC64_PLT16_HA:
15292 case R_PPC64_GOT_TLSGD16_HA:
15293 case R_PPC64_GOT_TLSLD16_HA:
15294 case R_PPC64_GOT_TPREL16_HA:
15295 case R_PPC64_GOT_DTPREL16_HA:
15296 /* Add 0x10000 if sign bit in 0:15 is set.
15297 Bits 0:15 are not used. */
15298 addend += 0x8000;
15299 break;
15300
15301 case R_PPC64_ADDR16_DS:
15302 case R_PPC64_ADDR16_LO_DS:
15303 case R_PPC64_GOT16_DS:
15304 case R_PPC64_GOT16_LO_DS:
15305 case R_PPC64_PLT16_LO_DS:
15306 case R_PPC64_SECTOFF_DS:
15307 case R_PPC64_SECTOFF_LO_DS:
15308 case R_PPC64_TOC16_DS:
15309 case R_PPC64_TOC16_LO_DS:
15310 case R_PPC64_PLTGOT16_DS:
15311 case R_PPC64_PLTGOT16_LO_DS:
15312 case R_PPC64_GOT_TPREL16_DS:
15313 case R_PPC64_GOT_TPREL16_LO_DS:
15314 case R_PPC64_GOT_DTPREL16_DS:
15315 case R_PPC64_GOT_DTPREL16_LO_DS:
15316 case R_PPC64_TPREL16_DS:
15317 case R_PPC64_TPREL16_LO_DS:
15318 case R_PPC64_DTPREL16_DS:
15319 case R_PPC64_DTPREL16_LO_DS:
15320 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15321 mask = 3;
15322 /* If this reloc is against an lq, lxv, or stxv insn, then
15323 the value must be a multiple of 16. This is somewhat of
15324 a hack, but the "correct" way to do this by defining _DQ
15325 forms of all the _DS relocs bloats all reloc switches in
15326 this file. It doesn't make much sense to use these
15327 relocs in data, so testing the insn should be safe. */
15328 if ((insn & (0x3f << 26)) == (56u << 26)
15329 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15330 mask = 15;
15331 relocation += addend;
15332 addend = insn & (mask ^ 3);
15333 if ((relocation & mask) != 0)
15334 {
15335 relocation ^= relocation & mask;
15336 info->callbacks->einfo
15337 /* xgettext:c-format */
15338 (_("%H: error: %s not a multiple of %u\n"),
15339 input_bfd, input_section, rel->r_offset,
15340 howto->name,
15341 mask + 1);
15342 bfd_set_error (bfd_error_bad_value);
15343 ret = FALSE;
15344 goto copy_reloc;
15345 }
15346 break;
15347 }
15348
15349 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15350 because such sections are not SEC_ALLOC and thus ld.so will
15351 not process them. */
15352 if (unresolved_reloc
15353 && !((input_section->flags & SEC_DEBUGGING) != 0
15354 && h->elf.def_dynamic)
15355 && _bfd_elf_section_offset (output_bfd, info, input_section,
15356 rel->r_offset) != (bfd_vma) -1)
15357 {
15358 info->callbacks->einfo
15359 /* xgettext:c-format */
15360 (_("%H: unresolvable %s against `%T'\n"),
15361 input_bfd, input_section, rel->r_offset,
15362 howto->name,
15363 h->elf.root.root.string);
15364 ret = FALSE;
15365 }
15366
15367 /* 16-bit fields in insns mostly have signed values, but a
15368 few insns have 16-bit unsigned values. Really, we should
15369 have different reloc types. */
15370 if (howto->complain_on_overflow != complain_overflow_dont
15371 && howto->dst_mask == 0xffff
15372 && (input_section->flags & SEC_CODE) != 0)
15373 {
15374 enum complain_overflow complain = complain_overflow_signed;
15375
15376 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15377 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15378 complain = complain_overflow_bitfield;
15379 else if (howto->rightshift == 0
15380 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15381 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15382 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15383 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15384 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15385 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15386 complain = complain_overflow_unsigned;
15387 if (howto->complain_on_overflow != complain)
15388 {
15389 alt_howto = *howto;
15390 alt_howto.complain_on_overflow = complain;
15391 howto = &alt_howto;
15392 }
15393 }
15394
15395 if (r_type == R_PPC64_REL16DX_HA)
15396 {
15397 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15398 if (rel->r_offset + 4 > input_section->size)
15399 r = bfd_reloc_outofrange;
15400 else
15401 {
15402 relocation += addend;
15403 relocation -= (rel->r_offset
15404 + input_section->output_offset
15405 + input_section->output_section->vma);
15406 relocation = (bfd_signed_vma) relocation >> 16;
15407 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15408 insn &= ~0x1fffc1;
15409 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15410 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15411 r = bfd_reloc_ok;
15412 if (relocation + 0x8000 > 0xffff)
15413 r = bfd_reloc_overflow;
15414 }
15415 }
15416 else
15417 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15418 rel->r_offset, relocation, addend);
15419
15420 if (r != bfd_reloc_ok)
15421 {
15422 char *more_info = NULL;
15423 const char *reloc_name = howto->name;
15424
15425 if (reloc_dest != DEST_NORMAL)
15426 {
15427 more_info = bfd_malloc (strlen (reloc_name) + 8);
15428 if (more_info != NULL)
15429 {
15430 strcpy (more_info, reloc_name);
15431 strcat (more_info, (reloc_dest == DEST_OPD
15432 ? " (OPD)" : " (stub)"));
15433 reloc_name = more_info;
15434 }
15435 }
15436
15437 if (r == bfd_reloc_overflow)
15438 {
15439 /* On code like "if (foo) foo();" don't report overflow
15440 on a branch to zero when foo is undefined. */
15441 if (!warned
15442 && (reloc_dest == DEST_STUB
15443 || !(h != NULL
15444 && (h->elf.root.type == bfd_link_hash_undefweak
15445 || h->elf.root.type == bfd_link_hash_undefined)
15446 && is_branch_reloc (r_type))))
15447 info->callbacks->reloc_overflow (info, &h->elf.root,
15448 sym_name, reloc_name,
15449 orig_rel.r_addend,
15450 input_bfd, input_section,
15451 rel->r_offset);
15452 }
15453 else
15454 {
15455 info->callbacks->einfo
15456 /* xgettext:c-format */
15457 (_("%H: %s against `%T': error %d\n"),
15458 input_bfd, input_section, rel->r_offset,
15459 reloc_name, sym_name, (int) r);
15460 ret = FALSE;
15461 }
15462 if (more_info != NULL)
15463 free (more_info);
15464 }
15465 copy_reloc:
15466 if (wrel != rel)
15467 *wrel = *rel;
15468 }
15469
15470 if (wrel != rel)
15471 {
15472 Elf_Internal_Shdr *rel_hdr;
15473 size_t deleted = rel - wrel;
15474
15475 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15476 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15477 if (rel_hdr->sh_size == 0)
15478 {
15479 /* It is too late to remove an empty reloc section. Leave
15480 one NONE reloc.
15481 ??? What is wrong with an empty section??? */
15482 rel_hdr->sh_size = rel_hdr->sh_entsize;
15483 deleted -= 1;
15484 }
15485 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15486 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15487 input_section->reloc_count -= deleted;
15488 }
15489
15490 /* If we're emitting relocations, then shortly after this function
15491 returns, reloc offsets and addends for this section will be
15492 adjusted. Worse, reloc symbol indices will be for the output
15493 file rather than the input. Save a copy of the relocs for
15494 opd_entry_value. */
15495 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15496 {
15497 bfd_size_type amt;
15498 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15499 rel = bfd_alloc (input_bfd, amt);
15500 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15501 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15502 if (rel == NULL)
15503 return FALSE;
15504 memcpy (rel, relocs, amt);
15505 }
15506 return ret;
15507 }
15508
15509 /* Adjust the value of any local symbols in opd sections. */
15510
15511 static int
15512 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15513 const char *name ATTRIBUTE_UNUSED,
15514 Elf_Internal_Sym *elfsym,
15515 asection *input_sec,
15516 struct elf_link_hash_entry *h)
15517 {
15518 struct _opd_sec_data *opd;
15519 long adjust;
15520 bfd_vma value;
15521
15522 if (h != NULL)
15523 return 1;
15524
15525 opd = get_opd_info (input_sec);
15526 if (opd == NULL || opd->adjust == NULL)
15527 return 1;
15528
15529 value = elfsym->st_value - input_sec->output_offset;
15530 if (!bfd_link_relocatable (info))
15531 value -= input_sec->output_section->vma;
15532
15533 adjust = opd->adjust[OPD_NDX (value)];
15534 if (adjust == -1)
15535 return 2;
15536
15537 elfsym->st_value += adjust;
15538 return 1;
15539 }
15540
15541 /* Finish up dynamic symbol handling. We set the contents of various
15542 dynamic sections here. */
15543
15544 static bfd_boolean
15545 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15546 struct bfd_link_info *info,
15547 struct elf_link_hash_entry *h,
15548 Elf_Internal_Sym *sym)
15549 {
15550 struct ppc_link_hash_table *htab;
15551 struct plt_entry *ent;
15552 Elf_Internal_Rela rela;
15553 bfd_byte *loc;
15554
15555 htab = ppc_hash_table (info);
15556 if (htab == NULL)
15557 return FALSE;
15558
15559 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15560 if (ent->plt.offset != (bfd_vma) -1)
15561 {
15562 /* This symbol has an entry in the procedure linkage
15563 table. Set it up. */
15564 if (!htab->elf.dynamic_sections_created
15565 || h->dynindx == -1)
15566 {
15567 BFD_ASSERT (h->type == STT_GNU_IFUNC
15568 && h->def_regular
15569 && (h->root.type == bfd_link_hash_defined
15570 || h->root.type == bfd_link_hash_defweak));
15571 rela.r_offset = (htab->elf.iplt->output_section->vma
15572 + htab->elf.iplt->output_offset
15573 + ent->plt.offset);
15574 if (htab->opd_abi)
15575 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15576 else
15577 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15578 rela.r_addend = (h->root.u.def.value
15579 + h->root.u.def.section->output_offset
15580 + h->root.u.def.section->output_section->vma
15581 + ent->addend);
15582 loc = (htab->elf.irelplt->contents
15583 + (htab->elf.irelplt->reloc_count++
15584 * sizeof (Elf64_External_Rela)));
15585 htab->local_ifunc_resolver = 1;
15586 }
15587 else
15588 {
15589 rela.r_offset = (htab->elf.splt->output_section->vma
15590 + htab->elf.splt->output_offset
15591 + ent->plt.offset);
15592 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15593 rela.r_addend = ent->addend;
15594 loc = (htab->elf.srelplt->contents
15595 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15596 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15597 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15598 htab->maybe_local_ifunc_resolver = 1;
15599 }
15600 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15601
15602 if (!htab->opd_abi)
15603 {
15604 if (!h->def_regular)
15605 {
15606 /* Mark the symbol as undefined, rather than as
15607 defined in glink. Leave the value if there were
15608 any relocations where pointer equality matters
15609 (this is a clue for the dynamic linker, to make
15610 function pointer comparisons work between an
15611 application and shared library), otherwise set it
15612 to zero. */
15613 sym->st_shndx = SHN_UNDEF;
15614 if (!h->pointer_equality_needed)
15615 sym->st_value = 0;
15616 else if (!h->ref_regular_nonweak)
15617 {
15618 /* This breaks function pointer comparisons, but
15619 that is better than breaking tests for a NULL
15620 function pointer. */
15621 sym->st_value = 0;
15622 }
15623 }
15624 }
15625 }
15626
15627 if (h->needs_copy)
15628 {
15629 /* This symbol needs a copy reloc. Set it up. */
15630 asection *srel;
15631
15632 if (h->dynindx == -1
15633 || (h->root.type != bfd_link_hash_defined
15634 && h->root.type != bfd_link_hash_defweak)
15635 || htab->elf.srelbss == NULL
15636 || htab->elf.sreldynrelro == NULL)
15637 abort ();
15638
15639 rela.r_offset = (h->root.u.def.value
15640 + h->root.u.def.section->output_section->vma
15641 + h->root.u.def.section->output_offset);
15642 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15643 rela.r_addend = 0;
15644 if (h->root.u.def.section == htab->elf.sdynrelro)
15645 srel = htab->elf.sreldynrelro;
15646 else
15647 srel = htab->elf.srelbss;
15648 loc = srel->contents;
15649 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15650 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15651 }
15652
15653 return TRUE;
15654 }
15655
15656 /* Used to decide how to sort relocs in an optimal manner for the
15657 dynamic linker, before writing them out. */
15658
15659 static enum elf_reloc_type_class
15660 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15661 const asection *rel_sec,
15662 const Elf_Internal_Rela *rela)
15663 {
15664 enum elf_ppc64_reloc_type r_type;
15665 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15666
15667 if (rel_sec == htab->elf.irelplt)
15668 return reloc_class_ifunc;
15669
15670 r_type = ELF64_R_TYPE (rela->r_info);
15671 switch (r_type)
15672 {
15673 case R_PPC64_RELATIVE:
15674 return reloc_class_relative;
15675 case R_PPC64_JMP_SLOT:
15676 return reloc_class_plt;
15677 case R_PPC64_COPY:
15678 return reloc_class_copy;
15679 default:
15680 return reloc_class_normal;
15681 }
15682 }
15683
15684 /* Finish up the dynamic sections. */
15685
15686 static bfd_boolean
15687 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15688 struct bfd_link_info *info)
15689 {
15690 struct ppc_link_hash_table *htab;
15691 bfd *dynobj;
15692 asection *sdyn;
15693
15694 htab = ppc_hash_table (info);
15695 if (htab == NULL)
15696 return FALSE;
15697
15698 dynobj = htab->elf.dynobj;
15699 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15700
15701 if (htab->elf.dynamic_sections_created)
15702 {
15703 Elf64_External_Dyn *dyncon, *dynconend;
15704
15705 if (sdyn == NULL || htab->elf.sgot == NULL)
15706 abort ();
15707
15708 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15709 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15710 for (; dyncon < dynconend; dyncon++)
15711 {
15712 Elf_Internal_Dyn dyn;
15713 asection *s;
15714
15715 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15716
15717 switch (dyn.d_tag)
15718 {
15719 default:
15720 continue;
15721
15722 case DT_PPC64_GLINK:
15723 s = htab->glink;
15724 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15725 /* We stupidly defined DT_PPC64_GLINK to be the start
15726 of glink rather than the first entry point, which is
15727 what ld.so needs, and now have a bigger stub to
15728 support automatic multiple TOCs. */
15729 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15730 break;
15731
15732 case DT_PPC64_OPD:
15733 s = bfd_get_section_by_name (output_bfd, ".opd");
15734 if (s == NULL)
15735 continue;
15736 dyn.d_un.d_ptr = s->vma;
15737 break;
15738
15739 case DT_PPC64_OPT:
15740 if (htab->do_multi_toc && htab->multi_toc_needed)
15741 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15742 if (htab->has_plt_localentry0)
15743 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15744 break;
15745
15746 case DT_PPC64_OPDSZ:
15747 s = bfd_get_section_by_name (output_bfd, ".opd");
15748 if (s == NULL)
15749 continue;
15750 dyn.d_un.d_val = s->size;
15751 break;
15752
15753 case DT_PLTGOT:
15754 s = htab->elf.splt;
15755 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15756 break;
15757
15758 case DT_JMPREL:
15759 s = htab->elf.srelplt;
15760 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15761 break;
15762
15763 case DT_PLTRELSZ:
15764 dyn.d_un.d_val = htab->elf.srelplt->size;
15765 break;
15766
15767 case DT_TEXTREL:
15768 if (htab->local_ifunc_resolver)
15769 info->callbacks->einfo
15770 (_("%X%P: text relocations and GNU indirect "
15771 "functions will result in a segfault at runtime\n"));
15772 else if (htab->maybe_local_ifunc_resolver)
15773 info->callbacks->einfo
15774 (_("%P: warning: text relocations and GNU indirect "
15775 "functions may result in a segfault at runtime\n"));
15776 continue;
15777 }
15778
15779 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15780 }
15781 }
15782
15783 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15784 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15785 {
15786 /* Fill in the first entry in the global offset table.
15787 We use it to hold the link-time TOCbase. */
15788 bfd_put_64 (output_bfd,
15789 elf_gp (output_bfd) + TOC_BASE_OFF,
15790 htab->elf.sgot->contents);
15791
15792 /* Set .got entry size. */
15793 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15794 }
15795
15796 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15797 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15798 {
15799 /* Set .plt entry size. */
15800 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15801 = PLT_ENTRY_SIZE (htab);
15802 }
15803
15804 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15805 brlt ourselves if emitrelocations. */
15806 if (htab->brlt != NULL
15807 && htab->brlt->reloc_count != 0
15808 && !_bfd_elf_link_output_relocs (output_bfd,
15809 htab->brlt,
15810 elf_section_data (htab->brlt)->rela.hdr,
15811 elf_section_data (htab->brlt)->relocs,
15812 NULL))
15813 return FALSE;
15814
15815 if (htab->glink != NULL
15816 && htab->glink->reloc_count != 0
15817 && !_bfd_elf_link_output_relocs (output_bfd,
15818 htab->glink,
15819 elf_section_data (htab->glink)->rela.hdr,
15820 elf_section_data (htab->glink)->relocs,
15821 NULL))
15822 return FALSE;
15823
15824 if (htab->glink_eh_frame != NULL
15825 && htab->glink_eh_frame->size != 0)
15826 {
15827 bfd_vma val;
15828 bfd_byte *p;
15829 struct map_stub *group;
15830 size_t align = 4;
15831
15832 p = htab->glink_eh_frame->contents;
15833 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15834
15835 for (group = htab->group; group != NULL; group = group->next)
15836 if (group->stub_sec != NULL)
15837 {
15838 /* Offset to stub section. */
15839 val = (group->stub_sec->output_section->vma
15840 + group->stub_sec->output_offset);
15841 val -= (htab->glink_eh_frame->output_section->vma
15842 + htab->glink_eh_frame->output_offset
15843 + (p + 8 - htab->glink_eh_frame->contents));
15844 if (val + 0x80000000 > 0xffffffff)
15845 {
15846 info->callbacks->einfo
15847 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15848 group->stub_sec->name);
15849 return FALSE;
15850 }
15851 bfd_put_32 (dynobj, val, p + 8);
15852 p += stub_eh_frame_size (group, align);
15853 }
15854 if (htab->glink != NULL && htab->glink->size != 0)
15855 {
15856 /* Offset to .glink. */
15857 val = (htab->glink->output_section->vma
15858 + htab->glink->output_offset
15859 + 8);
15860 val -= (htab->glink_eh_frame->output_section->vma
15861 + htab->glink_eh_frame->output_offset
15862 + (p + 8 - htab->glink_eh_frame->contents));
15863 if (val + 0x80000000 > 0xffffffff)
15864 {
15865 info->callbacks->einfo
15866 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15867 htab->glink->name);
15868 return FALSE;
15869 }
15870 bfd_put_32 (dynobj, val, p + 8);
15871 p += (24 + align - 1) & -align;
15872 }
15873
15874 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15875 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15876 htab->glink_eh_frame,
15877 htab->glink_eh_frame->contents))
15878 return FALSE;
15879 }
15880
15881 /* We need to handle writing out multiple GOT sections ourselves,
15882 since we didn't add them to DYNOBJ. We know dynobj is the first
15883 bfd. */
15884 while ((dynobj = dynobj->link.next) != NULL)
15885 {
15886 asection *s;
15887
15888 if (!is_ppc64_elf (dynobj))
15889 continue;
15890
15891 s = ppc64_elf_tdata (dynobj)->got;
15892 if (s != NULL
15893 && s->size != 0
15894 && s->output_section != bfd_abs_section_ptr
15895 && !bfd_set_section_contents (output_bfd, s->output_section,
15896 s->contents, s->output_offset,
15897 s->size))
15898 return FALSE;
15899 s = ppc64_elf_tdata (dynobj)->relgot;
15900 if (s != NULL
15901 && s->size != 0
15902 && s->output_section != bfd_abs_section_ptr
15903 && !bfd_set_section_contents (output_bfd, s->output_section,
15904 s->contents, s->output_offset,
15905 s->size))
15906 return FALSE;
15907 }
15908
15909 return TRUE;
15910 }
15911
15912 #include "elf64-target.h"
15913
15914 /* FreeBSD support */
15915
15916 #undef TARGET_LITTLE_SYM
15917 #undef TARGET_LITTLE_NAME
15918
15919 #undef TARGET_BIG_SYM
15920 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15921 #undef TARGET_BIG_NAME
15922 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15923
15924 #undef ELF_OSABI
15925 #define ELF_OSABI ELFOSABI_FREEBSD
15926
15927 #undef elf64_bed
15928 #define elf64_bed elf64_powerpc_fbsd_bed
15929
15930 #include "elf64-target.h"
GDB Binutils - Deliverables
This page took 0.386301 seconds and 4 git commands to generate.