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Move UNDEFWEAK_NO_DYNAMIC_RELOC to elf-bfd.h
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_want_dynrelro 1
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_gc_keep ppc64_elf_gc_keep
105 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
106 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
107 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* glink call stub instructions. We enter with the index in R0. */
191 #define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
196 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213 /* Pad with this. */
214 #define NOP 0x60000000
215
216 /* Some other nops. */
217 #define CROR_151515 0x4def7b82
218 #define CROR_313131 0x4ffffb82
219
220 /* .glink entries for the first 32k functions are two instructions. */
221 #define LI_R0_0 0x38000000 /* li %r0,0 */
222 #define B_DOT 0x48000000 /* b . */
223
224 /* After that, we need two instructions to load the index, followed by
225 a branch. */
226 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229 /* Instructions used by the save and restore reg functions. */
230 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236 #define LI_R12_0 0x39800000 /* li %r12,0 */
237 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240 #define BLR 0x4e800020 /* blr */
241
242 /* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246 #ifndef NO_OPD_RELOCS
247 #define NO_OPD_RELOCS 0
248 #endif
249
250 #ifndef ARRAY_SIZE
251 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252 #endif
253
254 static inline int
255 abiversion (bfd *abfd)
256 {
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258 }
259
260 static inline void
261 set_abiversion (bfd *abfd, int ver)
262 {
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265 }
266 \f
267 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269 /* Relocation HOWTO's. */
270 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272 static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213 };
2214
2215 \f
2216 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219 static void
2220 ppc_howto_init (void)
2221 {
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230 }
2231
2232 static reloc_howto_type *
2233 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235 {
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484 };
2485
2486 static reloc_howto_type *
2487 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489 {
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498 }
2499
2500 /* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502 static void
2503 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505 {
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521 }
2522
2523 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525 static bfd_reloc_status_type
2526 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529 {
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569 }
2570
2571 static bfd_reloc_status_type
2572 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575 {
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679 }
2680
2681 static bfd_reloc_status_type
2682 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
2685 {
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738 return bfd_reloc_continue;
2739 }
2740
2741 static bfd_reloc_status_type
2742 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745 {
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811 }
2812
2813 /* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815 struct got_entry
2816 {
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845 };
2846
2847 /* The same for PLT. */
2848 struct plt_entry
2849 {
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859 };
2860
2861 struct ppc64_elf_obj_tdata
2862 {
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892 };
2893
2894 #define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897 #define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900 #define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904 /* Override the generic function because we store some extras. */
2905
2906 static bfd_boolean
2907 ppc64_elf_mkobject (bfd *abfd)
2908 {
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911 }
2912
2913 /* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916 static bfd_boolean
2917 ppc64_elf_object_p (bfd *abfd)
2918 {
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934 }
2935
2936 /* Support for core dump NOTE sections. */
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959 }
2960
2961 static bfd_boolean
2962 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963 {
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975 }
2976
2977 static char *
2978 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980 {
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022 }
3023
3024 /* Add extra PPC sections. */
3025
3026 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027 {
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035 };
3036
3037 enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041 };
3042
3043 struct _ppc64_elf_section_data
3044 {
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051 #define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077 };
3078
3079 #define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082 static bfd_boolean
3083 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084 {
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097 }
3098
3099 static struct _opd_sec_data *
3100 get_opd_info (asection * sec)
3101 {
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107 }
3108 \f
3109 /* Parameters for the qsort hook. */
3110 static bfd_boolean synthetic_relocatable;
3111 static asection *synthetic_opd;
3112
3113 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115 static int
3116 compare_symbols (const void *ap, const void *bp)
3117 {
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193 }
3194
3195 /* Search SYMS for a symbol of the given VALUE. */
3196
3197 static asymbol *
3198 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199 {
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233 }
3234
3235 static bfd_boolean
3236 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237 {
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242 }
3243
3244 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248 static long
3249 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253 {
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 syms = NULL;
3274 codesecsym = 0;
3275 codesecsymend = 0;
3276 secsymend = 0;
3277 opdsymend = 0;
3278 symcount = 0;
3279 if (opd != NULL)
3280 {
3281 symcount = static_count;
3282 if (!relocatable)
3283 symcount += dyn_count;
3284 if (symcount == 0)
3285 return 0;
3286
3287 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3288 if (syms == NULL)
3289 return -1;
3290
3291 if (!relocatable && static_count != 0 && dyn_count != 0)
3292 {
3293 /* Use both symbol tables. */
3294 memcpy (syms, static_syms, static_count * sizeof (*syms));
3295 memcpy (syms + static_count, dyn_syms,
3296 (dyn_count + 1) * sizeof (*syms));
3297 }
3298 else if (!relocatable && static_count == 0)
3299 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3300 else
3301 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3302
3303 synthetic_relocatable = relocatable;
3304 synthetic_opd = opd;
3305 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3306
3307 if (!relocatable && symcount > 1)
3308 {
3309 long j;
3310 /* Trim duplicate syms, since we may have merged the normal and
3311 dynamic symbols. Actually, we only care about syms that have
3312 different values, so trim any with the same value. */
3313 for (i = 1, j = 1; i < symcount; ++i)
3314 if (syms[i - 1]->value + syms[i - 1]->section->vma
3315 != syms[i]->value + syms[i]->section->vma)
3316 syms[j++] = syms[i];
3317 symcount = j;
3318 }
3319
3320 i = 0;
3321 /* Note that here and in compare_symbols we can't compare opd and
3322 sym->section directly. With separate debug info files, the
3323 symbols will be extracted from the debug file while abfd passed
3324 to this function is the real binary. */
3325 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3326 ++i;
3327 codesecsym = i;
3328
3329 for (; i < symcount; ++i)
3330 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3331 | SEC_THREAD_LOCAL))
3332 != (SEC_CODE | SEC_ALLOC))
3333 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3334 break;
3335 codesecsymend = i;
3336
3337 for (; i < symcount; ++i)
3338 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3339 break;
3340 secsymend = i;
3341
3342 for (; i < symcount; ++i)
3343 if (strcmp (syms[i]->section->name, ".opd") != 0)
3344 break;
3345 opdsymend = i;
3346
3347 for (; i < symcount; ++i)
3348 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3349 != (SEC_CODE | SEC_ALLOC))
3350 break;
3351 symcount = i;
3352 }
3353 count = 0;
3354
3355 if (relocatable)
3356 {
3357 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3358 arelent *r;
3359 size_t size;
3360 long relcount;
3361
3362 if (opdsymend == secsymend)
3363 goto done;
3364
3365 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3366 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3367 if (relcount == 0)
3368 goto done;
3369
3370 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3371 {
3372 count = -1;
3373 goto done;
3374 }
3375
3376 size = 0;
3377 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3378 {
3379 asymbol *sym;
3380
3381 while (r < opd->relocation + relcount
3382 && r->address < syms[i]->value + opd->vma)
3383 ++r;
3384
3385 if (r == opd->relocation + relcount)
3386 break;
3387
3388 if (r->address != syms[i]->value + opd->vma)
3389 continue;
3390
3391 if (r->howto->type != R_PPC64_ADDR64)
3392 continue;
3393
3394 sym = *r->sym_ptr_ptr;
3395 if (!sym_exists_at (syms, opdsymend, symcount,
3396 sym->section->id, sym->value + r->addend))
3397 {
3398 ++count;
3399 size += sizeof (asymbol);
3400 size += strlen (syms[i]->name) + 2;
3401 }
3402 }
3403
3404 if (size == 0)
3405 goto done;
3406 s = *ret = bfd_malloc (size);
3407 if (s == NULL)
3408 {
3409 count = -1;
3410 goto done;
3411 }
3412
3413 names = (char *) (s + count);
3414
3415 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3416 {
3417 asymbol *sym;
3418
3419 while (r < opd->relocation + relcount
3420 && r->address < syms[i]->value + opd->vma)
3421 ++r;
3422
3423 if (r == opd->relocation + relcount)
3424 break;
3425
3426 if (r->address != syms[i]->value + opd->vma)
3427 continue;
3428
3429 if (r->howto->type != R_PPC64_ADDR64)
3430 continue;
3431
3432 sym = *r->sym_ptr_ptr;
3433 if (!sym_exists_at (syms, opdsymend, symcount,
3434 sym->section->id, sym->value + r->addend))
3435 {
3436 size_t len;
3437
3438 *s = *syms[i];
3439 s->flags |= BSF_SYNTHETIC;
3440 s->section = sym->section;
3441 s->value = sym->value + r->addend;
3442 s->name = names;
3443 *names++ = '.';
3444 len = strlen (syms[i]->name);
3445 memcpy (names, syms[i]->name, len + 1);
3446 names += len + 1;
3447 /* Have udata.p point back to the original symbol this
3448 synthetic symbol was derived from. */
3449 s->udata.p = syms[i];
3450 s++;
3451 }
3452 }
3453 }
3454 else
3455 {
3456 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3457 bfd_byte *contents = NULL;
3458 size_t size;
3459 long plt_count = 0;
3460 bfd_vma glink_vma = 0, resolv_vma = 0;
3461 asection *dynamic, *glink = NULL, *relplt = NULL;
3462 arelent *p;
3463
3464 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3465 {
3466 free_contents_and_exit_err:
3467 count = -1;
3468 free_contents_and_exit:
3469 if (contents)
3470 free (contents);
3471 goto done;
3472 }
3473
3474 size = 0;
3475 for (i = secsymend; i < opdsymend; ++i)
3476 {
3477 bfd_vma ent;
3478
3479 /* Ignore bogus symbols. */
3480 if (syms[i]->value > opd->size - 8)
3481 continue;
3482
3483 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3484 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3485 {
3486 ++count;
3487 size += sizeof (asymbol);
3488 size += strlen (syms[i]->name) + 2;
3489 }
3490 }
3491
3492 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3493 if (dyn_count != 0
3494 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3495 {
3496 bfd_byte *dynbuf, *extdyn, *extdynend;
3497 size_t extdynsize;
3498 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3499
3500 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3501 goto free_contents_and_exit_err;
3502
3503 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3504 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3505
3506 extdyn = dynbuf;
3507 extdynend = extdyn + dynamic->size;
3508 for (; extdyn < extdynend; extdyn += extdynsize)
3509 {
3510 Elf_Internal_Dyn dyn;
3511 (*swap_dyn_in) (abfd, extdyn, &dyn);
3512
3513 if (dyn.d_tag == DT_NULL)
3514 break;
3515
3516 if (dyn.d_tag == DT_PPC64_GLINK)
3517 {
3518 /* The first glink stub starts at offset 32; see
3519 comment in ppc64_elf_finish_dynamic_sections. */
3520 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3521 /* The .glink section usually does not survive the final
3522 link; search for the section (usually .text) where the
3523 glink stubs now reside. */
3524 glink = bfd_sections_find_if (abfd, section_covers_vma,
3525 &glink_vma);
3526 break;
3527 }
3528 }
3529
3530 free (dynbuf);
3531 }
3532
3533 if (glink != NULL)
3534 {
3535 /* Determine __glink trampoline by reading the relative branch
3536 from the first glink stub. */
3537 bfd_byte buf[4];
3538 unsigned int off = 0;
3539
3540 while (bfd_get_section_contents (abfd, glink, buf,
3541 glink_vma + off - glink->vma, 4))
3542 {
3543 unsigned int insn = bfd_get_32 (abfd, buf);
3544 insn ^= B_DOT;
3545 if ((insn & ~0x3fffffc) == 0)
3546 {
3547 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3548 break;
3549 }
3550 off += 4;
3551 if (off > 4)
3552 break;
3553 }
3554
3555 if (resolv_vma)
3556 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3557
3558 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3559 if (relplt != NULL)
3560 {
3561 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3562 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3563 goto free_contents_and_exit_err;
3564
3565 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3566 size += plt_count * sizeof (asymbol);
3567
3568 p = relplt->relocation;
3569 for (i = 0; i < plt_count; i++, p++)
3570 {
3571 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3572 if (p->addend != 0)
3573 size += sizeof ("+0x") - 1 + 16;
3574 }
3575 }
3576 }
3577
3578 if (size == 0)
3579 goto free_contents_and_exit;
3580 s = *ret = bfd_malloc (size);
3581 if (s == NULL)
3582 goto free_contents_and_exit_err;
3583
3584 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3585
3586 for (i = secsymend; i < opdsymend; ++i)
3587 {
3588 bfd_vma ent;
3589
3590 if (syms[i]->value > opd->size - 8)
3591 continue;
3592
3593 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3594 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3595 {
3596 long lo, hi;
3597 size_t len;
3598 asection *sec = abfd->sections;
3599
3600 *s = *syms[i];
3601 lo = codesecsym;
3602 hi = codesecsymend;
3603 while (lo < hi)
3604 {
3605 long mid = (lo + hi) >> 1;
3606 if (syms[mid]->section->vma < ent)
3607 lo = mid + 1;
3608 else if (syms[mid]->section->vma > ent)
3609 hi = mid;
3610 else
3611 {
3612 sec = syms[mid]->section;
3613 break;
3614 }
3615 }
3616
3617 if (lo >= hi && lo > codesecsym)
3618 sec = syms[lo - 1]->section;
3619
3620 for (; sec != NULL; sec = sec->next)
3621 {
3622 if (sec->vma > ent)
3623 break;
3624 /* SEC_LOAD may not be set if SEC is from a separate debug
3625 info file. */
3626 if ((sec->flags & SEC_ALLOC) == 0)
3627 break;
3628 if ((sec->flags & SEC_CODE) != 0)
3629 s->section = sec;
3630 }
3631 s->flags |= BSF_SYNTHETIC;
3632 s->value = ent - s->section->vma;
3633 s->name = names;
3634 *names++ = '.';
3635 len = strlen (syms[i]->name);
3636 memcpy (names, syms[i]->name, len + 1);
3637 names += len + 1;
3638 /* Have udata.p point back to the original symbol this
3639 synthetic symbol was derived from. */
3640 s->udata.p = syms[i];
3641 s++;
3642 }
3643 }
3644 free (contents);
3645
3646 if (glink != NULL && relplt != NULL)
3647 {
3648 if (resolv_vma)
3649 {
3650 /* Add a symbol for the main glink trampoline. */
3651 memset (s, 0, sizeof *s);
3652 s->the_bfd = abfd;
3653 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3654 s->section = glink;
3655 s->value = resolv_vma - glink->vma;
3656 s->name = names;
3657 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3658 names += sizeof ("__glink_PLTresolve");
3659 s++;
3660 count++;
3661 }
3662
3663 /* FIXME: It would be very much nicer to put sym@plt on the
3664 stub rather than on the glink branch table entry. The
3665 objdump disassembler would then use a sensible symbol
3666 name on plt calls. The difficulty in doing so is
3667 a) finding the stubs, and,
3668 b) matching stubs against plt entries, and,
3669 c) there can be multiple stubs for a given plt entry.
3670
3671 Solving (a) could be done by code scanning, but older
3672 ppc64 binaries used different stubs to current code.
3673 (b) is the tricky one since you need to known the toc
3674 pointer for at least one function that uses a pic stub to
3675 be able to calculate the plt address referenced.
3676 (c) means gdb would need to set multiple breakpoints (or
3677 find the glink branch itself) when setting breakpoints
3678 for pending shared library loads. */
3679 p = relplt->relocation;
3680 for (i = 0; i < plt_count; i++, p++)
3681 {
3682 size_t len;
3683
3684 *s = **p->sym_ptr_ptr;
3685 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3686 we are defining a symbol, ensure one of them is set. */
3687 if ((s->flags & BSF_LOCAL) == 0)
3688 s->flags |= BSF_GLOBAL;
3689 s->flags |= BSF_SYNTHETIC;
3690 s->section = glink;
3691 s->value = glink_vma - glink->vma;
3692 s->name = names;
3693 s->udata.p = NULL;
3694 len = strlen ((*p->sym_ptr_ptr)->name);
3695 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3696 names += len;
3697 if (p->addend != 0)
3698 {
3699 memcpy (names, "+0x", sizeof ("+0x") - 1);
3700 names += sizeof ("+0x") - 1;
3701 bfd_sprintf_vma (abfd, names, p->addend);
3702 names += strlen (names);
3703 }
3704 memcpy (names, "@plt", sizeof ("@plt"));
3705 names += sizeof ("@plt");
3706 s++;
3707 if (abi < 2)
3708 {
3709 glink_vma += 8;
3710 if (i >= 0x8000)
3711 glink_vma += 4;
3712 }
3713 else
3714 glink_vma += 4;
3715 }
3716 count += plt_count;
3717 }
3718 }
3719
3720 done:
3721 free (syms);
3722 return count;
3723 }
3724 \f
3725 /* The following functions are specific to the ELF linker, while
3726 functions above are used generally. Those named ppc64_elf_* are
3727 called by the main ELF linker code. They appear in this file more
3728 or less in the order in which they are called. eg.
3729 ppc64_elf_check_relocs is called early in the link process,
3730 ppc64_elf_finish_dynamic_sections is one of the last functions
3731 called.
3732
3733 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3734 functions have both a function code symbol and a function descriptor
3735 symbol. A call to foo in a relocatable object file looks like:
3736
3737 . .text
3738 . x:
3739 . bl .foo
3740 . nop
3741
3742 The function definition in another object file might be:
3743
3744 . .section .opd
3745 . foo: .quad .foo
3746 . .quad .TOC.@tocbase
3747 . .quad 0
3748 .
3749 . .text
3750 . .foo: blr
3751
3752 When the linker resolves the call during a static link, the branch
3753 unsurprisingly just goes to .foo and the .opd information is unused.
3754 If the function definition is in a shared library, things are a little
3755 different: The call goes via a plt call stub, the opd information gets
3756 copied to the plt, and the linker patches the nop.
3757
3758 . x:
3759 . bl .foo_stub
3760 . ld 2,40(1)
3761 .
3762 .
3763 . .foo_stub:
3764 . std 2,40(1) # in practice, the call stub
3765 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3766 . addi 11,11,Lfoo@toc@l # this is the general idea
3767 . ld 12,0(11)
3768 . ld 2,8(11)
3769 . mtctr 12
3770 . ld 11,16(11)
3771 . bctr
3772 .
3773 . .section .plt
3774 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3775
3776 The "reloc ()" notation is supposed to indicate that the linker emits
3777 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3778 copying.
3779
3780 What are the difficulties here? Well, firstly, the relocations
3781 examined by the linker in check_relocs are against the function code
3782 sym .foo, while the dynamic relocation in the plt is emitted against
3783 the function descriptor symbol, foo. Somewhere along the line, we need
3784 to carefully copy dynamic link information from one symbol to the other.
3785 Secondly, the generic part of the elf linker will make .foo a dynamic
3786 symbol as is normal for most other backends. We need foo dynamic
3787 instead, at least for an application final link. However, when
3788 creating a shared library containing foo, we need to have both symbols
3789 dynamic so that references to .foo are satisfied during the early
3790 stages of linking. Otherwise the linker might decide to pull in a
3791 definition from some other object, eg. a static library.
3792
3793 Update: As of August 2004, we support a new convention. Function
3794 calls may use the function descriptor symbol, ie. "bl foo". This
3795 behaves exactly as "bl .foo". */
3796
3797 /* Of those relocs that might be copied as dynamic relocs, this
3798 function selects those that must be copied when linking a shared
3799 library or PIE, even when the symbol is local. */
3800
3801 static int
3802 must_be_dyn_reloc (struct bfd_link_info *info,
3803 enum elf_ppc64_reloc_type r_type)
3804 {
3805 switch (r_type)
3806 {
3807 default:
3808 /* Only relative relocs can be resolved when the object load
3809 address isn't fixed. DTPREL64 is excluded because the
3810 dynamic linker needs to differentiate global dynamic from
3811 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3812 return 1;
3813
3814 case R_PPC64_REL32:
3815 case R_PPC64_REL64:
3816 case R_PPC64_REL30:
3817 return 0;
3818
3819 case R_PPC64_TPREL16:
3820 case R_PPC64_TPREL16_LO:
3821 case R_PPC64_TPREL16_HI:
3822 case R_PPC64_TPREL16_HA:
3823 case R_PPC64_TPREL16_DS:
3824 case R_PPC64_TPREL16_LO_DS:
3825 case R_PPC64_TPREL16_HIGH:
3826 case R_PPC64_TPREL16_HIGHA:
3827 case R_PPC64_TPREL16_HIGHER:
3828 case R_PPC64_TPREL16_HIGHERA:
3829 case R_PPC64_TPREL16_HIGHEST:
3830 case R_PPC64_TPREL16_HIGHESTA:
3831 case R_PPC64_TPREL64:
3832 /* These relocations are relative but in a shared library the
3833 linker doesn't know the thread pointer base. */
3834 return bfd_link_dll (info);
3835 }
3836 }
3837
3838 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3839 copying dynamic variables from a shared lib into an app's dynbss
3840 section, and instead use a dynamic relocation to point into the
3841 shared lib. With code that gcc generates, it's vital that this be
3842 enabled; In the PowerPC64 ABI, the address of a function is actually
3843 the address of a function descriptor, which resides in the .opd
3844 section. gcc uses the descriptor directly rather than going via the
3845 GOT as some other ABI's do, which means that initialized function
3846 pointers must reference the descriptor. Thus, a function pointer
3847 initialized to the address of a function in a shared library will
3848 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3849 redefines the function descriptor symbol to point to the copy. This
3850 presents a problem as a plt entry for that function is also
3851 initialized from the function descriptor symbol and the copy reloc
3852 may not be initialized first. */
3853 #define ELIMINATE_COPY_RELOCS 1
3854
3855 /* Section name for stubs is the associated section name plus this
3856 string. */
3857 #define STUB_SUFFIX ".stub"
3858
3859 /* Linker stubs.
3860 ppc_stub_long_branch:
3861 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3862 destination, but a 24 bit branch in a stub section will reach.
3863 . b dest
3864
3865 ppc_stub_plt_branch:
3866 Similar to the above, but a 24 bit branch in the stub section won't
3867 reach its destination.
3868 . addis %r11,%r2,xxx@toc@ha
3869 . ld %r12,xxx@toc@l(%r11)
3870 . mtctr %r12
3871 . bctr
3872
3873 ppc_stub_plt_call:
3874 Used to call a function in a shared library. If it so happens that
3875 the plt entry referenced crosses a 64k boundary, then an extra
3876 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3877 . std %r2,40(%r1)
3878 . addis %r11,%r2,xxx@toc@ha
3879 . ld %r12,xxx+0@toc@l(%r11)
3880 . mtctr %r12
3881 . ld %r2,xxx+8@toc@l(%r11)
3882 . ld %r11,xxx+16@toc@l(%r11)
3883 . bctr
3884
3885 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3886 code to adjust the value and save r2 to support multiple toc sections.
3887 A ppc_stub_long_branch with an r2 offset looks like:
3888 . std %r2,40(%r1)
3889 . addis %r2,%r2,off@ha
3890 . addi %r2,%r2,off@l
3891 . b dest
3892
3893 A ppc_stub_plt_branch with an r2 offset looks like:
3894 . std %r2,40(%r1)
3895 . addis %r11,%r2,xxx@toc@ha
3896 . ld %r12,xxx@toc@l(%r11)
3897 . addis %r2,%r2,off@ha
3898 . addi %r2,%r2,off@l
3899 . mtctr %r12
3900 . bctr
3901
3902 In cases where the "addis" instruction would add zero, the "addis" is
3903 omitted and following instructions modified slightly in some cases.
3904 */
3905
3906 enum ppc_stub_type {
3907 ppc_stub_none,
3908 ppc_stub_long_branch,
3909 ppc_stub_long_branch_r2off,
3910 ppc_stub_plt_branch,
3911 ppc_stub_plt_branch_r2off,
3912 ppc_stub_plt_call,
3913 ppc_stub_plt_call_r2save,
3914 ppc_stub_global_entry,
3915 ppc_stub_save_res
3916 };
3917
3918 /* Information on stub grouping. */
3919 struct map_stub
3920 {
3921 /* The stub section. */
3922 asection *stub_sec;
3923 /* This is the section to which stubs in the group will be attached. */
3924 asection *link_sec;
3925 /* Next group. */
3926 struct map_stub *next;
3927 /* Whether to emit a copy of register save/restore functions in this
3928 group. */
3929 int needs_save_res;
3930 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3931 or -1u if no such stub with bctrl exists. */
3932 unsigned int tls_get_addr_opt_bctrl;
3933 };
3934
3935 struct ppc_stub_hash_entry {
3936
3937 /* Base hash table entry structure. */
3938 struct bfd_hash_entry root;
3939
3940 enum ppc_stub_type stub_type;
3941
3942 /* Group information. */
3943 struct map_stub *group;
3944
3945 /* Offset within stub_sec of the beginning of this stub. */
3946 bfd_vma stub_offset;
3947
3948 /* Given the symbol's value and its section we can determine its final
3949 value when building the stubs (so the stub knows where to jump. */
3950 bfd_vma target_value;
3951 asection *target_section;
3952
3953 /* The symbol table entry, if any, that this was derived from. */
3954 struct ppc_link_hash_entry *h;
3955 struct plt_entry *plt_ent;
3956
3957 /* Symbol st_other. */
3958 unsigned char other;
3959 };
3960
3961 struct ppc_branch_hash_entry {
3962
3963 /* Base hash table entry structure. */
3964 struct bfd_hash_entry root;
3965
3966 /* Offset within branch lookup table. */
3967 unsigned int offset;
3968
3969 /* Generation marker. */
3970 unsigned int iter;
3971 };
3972
3973 /* Used to track dynamic relocations for local symbols. */
3974 struct ppc_dyn_relocs
3975 {
3976 struct ppc_dyn_relocs *next;
3977
3978 /* The input section of the reloc. */
3979 asection *sec;
3980
3981 /* Total number of relocs copied for the input section. */
3982 unsigned int count : 31;
3983
3984 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3985 unsigned int ifunc : 1;
3986 };
3987
3988 struct ppc_link_hash_entry
3989 {
3990 struct elf_link_hash_entry elf;
3991
3992 union {
3993 /* A pointer to the most recently used stub hash entry against this
3994 symbol. */
3995 struct ppc_stub_hash_entry *stub_cache;
3996
3997 /* A pointer to the next symbol starting with a '.' */
3998 struct ppc_link_hash_entry *next_dot_sym;
3999 } u;
4000
4001 /* Track dynamic relocs copied for this symbol. */
4002 struct elf_dyn_relocs *dyn_relocs;
4003
4004 /* Chain of aliases referring to a weakdef. */
4005 struct ppc_link_hash_entry *weakref;
4006
4007 /* Link between function code and descriptor symbols. */
4008 struct ppc_link_hash_entry *oh;
4009
4010 /* Flag function code and descriptor symbols. */
4011 unsigned int is_func:1;
4012 unsigned int is_func_descriptor:1;
4013 unsigned int fake:1;
4014
4015 /* Whether global opd/toc sym has been adjusted or not.
4016 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4017 should be set for all globals defined in any opd/toc section. */
4018 unsigned int adjust_done:1;
4019
4020 /* Set if this is an out-of-line register save/restore function,
4021 with non-standard calling convention. */
4022 unsigned int save_res:1;
4023
4024 /* Set if a duplicate symbol with non-zero localentry is detected,
4025 even when the duplicate symbol does not provide a definition. */
4026 unsigned int non_zero_localentry:1;
4027
4028 /* Contexts in which symbol is used in the GOT (or TOC).
4029 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4030 corresponding relocs are encountered during check_relocs.
4031 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4032 indicate the corresponding GOT entry type is not needed.
4033 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4034 a TPREL one. We use a separate flag rather than setting TPREL
4035 just for convenience in distinguishing the two cases. */
4036 #define TLS_GD 1 /* GD reloc. */
4037 #define TLS_LD 2 /* LD reloc. */
4038 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4039 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4040 #define TLS_TLS 16 /* Any TLS reloc. */
4041 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4042 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4043 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4044 unsigned char tls_mask;
4045 };
4046
4047 /* ppc64 ELF linker hash table. */
4048
4049 struct ppc_link_hash_table
4050 {
4051 struct elf_link_hash_table elf;
4052
4053 /* The stub hash table. */
4054 struct bfd_hash_table stub_hash_table;
4055
4056 /* Another hash table for plt_branch stubs. */
4057 struct bfd_hash_table branch_hash_table;
4058
4059 /* Hash table for function prologue tocsave. */
4060 htab_t tocsave_htab;
4061
4062 /* Various options and other info passed from the linker. */
4063 struct ppc64_elf_params *params;
4064
4065 /* The size of sec_info below. */
4066 unsigned int sec_info_arr_size;
4067
4068 /* Per-section array of extra section info. Done this way rather
4069 than as part of ppc64_elf_section_data so we have the info for
4070 non-ppc64 sections. */
4071 struct
4072 {
4073 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4074 bfd_vma toc_off;
4075
4076 union
4077 {
4078 /* The section group that this section belongs to. */
4079 struct map_stub *group;
4080 /* A temp section list pointer. */
4081 asection *list;
4082 } u;
4083 } *sec_info;
4084
4085 /* Linked list of groups. */
4086 struct map_stub *group;
4087
4088 /* Temp used when calculating TOC pointers. */
4089 bfd_vma toc_curr;
4090 bfd *toc_bfd;
4091 asection *toc_first_sec;
4092
4093 /* Used when adding symbols. */
4094 struct ppc_link_hash_entry *dot_syms;
4095
4096 /* Shortcuts to get to dynamic linker sections. */
4097 asection *glink;
4098 asection *sfpr;
4099 asection *brlt;
4100 asection *relbrlt;
4101 asection *glink_eh_frame;
4102
4103 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4104 struct ppc_link_hash_entry *tls_get_addr;
4105 struct ppc_link_hash_entry *tls_get_addr_fd;
4106
4107 /* The size of reliplt used by got entry relocs. */
4108 bfd_size_type got_reli_size;
4109
4110 /* Statistics. */
4111 unsigned long stub_count[ppc_stub_global_entry];
4112
4113 /* Number of stubs against global syms. */
4114 unsigned long stub_globals;
4115
4116 /* Set if we're linking code with function descriptors. */
4117 unsigned int opd_abi:1;
4118
4119 /* Support for multiple toc sections. */
4120 unsigned int do_multi_toc:1;
4121 unsigned int multi_toc_needed:1;
4122 unsigned int second_toc_pass:1;
4123 unsigned int do_toc_opt:1;
4124
4125 /* Set if tls optimization is enabled. */
4126 unsigned int do_tls_opt:1;
4127
4128 /* Set on error. */
4129 unsigned int stub_error:1;
4130
4131 /* Whether func_desc_adjust needs to be run over symbols. */
4132 unsigned int need_func_desc_adj:1;
4133
4134 /* Whether there exist local gnu indirect function resolvers,
4135 referenced by dynamic relocations. */
4136 unsigned int local_ifunc_resolver:1;
4137 unsigned int maybe_local_ifunc_resolver:1;
4138
4139 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4140 unsigned int has_plt_localentry0:1;
4141
4142 /* Incremented every time we size stubs. */
4143 unsigned int stub_iteration;
4144
4145 /* Small local sym cache. */
4146 struct sym_cache sym_cache;
4147 };
4148
4149 /* Rename some of the generic section flags to better document how they
4150 are used here. */
4151
4152 /* Nonzero if this section has TLS related relocations. */
4153 #define has_tls_reloc sec_flg0
4154
4155 /* Nonzero if this section has a call to __tls_get_addr. */
4156 #define has_tls_get_addr_call sec_flg1
4157
4158 /* Nonzero if this section has any toc or got relocs. */
4159 #define has_toc_reloc sec_flg2
4160
4161 /* Nonzero if this section has a call to another section that uses
4162 the toc or got. */
4163 #define makes_toc_func_call sec_flg3
4164
4165 /* Recursion protection when determining above flag. */
4166 #define call_check_in_progress sec_flg4
4167 #define call_check_done sec_flg5
4168
4169 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4170
4171 #define ppc_hash_table(p) \
4172 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4173 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4174
4175 #define ppc_stub_hash_lookup(table, string, create, copy) \
4176 ((struct ppc_stub_hash_entry *) \
4177 bfd_hash_lookup ((table), (string), (create), (copy)))
4178
4179 #define ppc_branch_hash_lookup(table, string, create, copy) \
4180 ((struct ppc_branch_hash_entry *) \
4181 bfd_hash_lookup ((table), (string), (create), (copy)))
4182
4183 /* Create an entry in the stub hash table. */
4184
4185 static struct bfd_hash_entry *
4186 stub_hash_newfunc (struct bfd_hash_entry *entry,
4187 struct bfd_hash_table *table,
4188 const char *string)
4189 {
4190 /* Allocate the structure if it has not already been allocated by a
4191 subclass. */
4192 if (entry == NULL)
4193 {
4194 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4195 if (entry == NULL)
4196 return entry;
4197 }
4198
4199 /* Call the allocation method of the superclass. */
4200 entry = bfd_hash_newfunc (entry, table, string);
4201 if (entry != NULL)
4202 {
4203 struct ppc_stub_hash_entry *eh;
4204
4205 /* Initialize the local fields. */
4206 eh = (struct ppc_stub_hash_entry *) entry;
4207 eh->stub_type = ppc_stub_none;
4208 eh->group = NULL;
4209 eh->stub_offset = 0;
4210 eh->target_value = 0;
4211 eh->target_section = NULL;
4212 eh->h = NULL;
4213 eh->plt_ent = NULL;
4214 eh->other = 0;
4215 }
4216
4217 return entry;
4218 }
4219
4220 /* Create an entry in the branch hash table. */
4221
4222 static struct bfd_hash_entry *
4223 branch_hash_newfunc (struct bfd_hash_entry *entry,
4224 struct bfd_hash_table *table,
4225 const char *string)
4226 {
4227 /* Allocate the structure if it has not already been allocated by a
4228 subclass. */
4229 if (entry == NULL)
4230 {
4231 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4232 if (entry == NULL)
4233 return entry;
4234 }
4235
4236 /* Call the allocation method of the superclass. */
4237 entry = bfd_hash_newfunc (entry, table, string);
4238 if (entry != NULL)
4239 {
4240 struct ppc_branch_hash_entry *eh;
4241
4242 /* Initialize the local fields. */
4243 eh = (struct ppc_branch_hash_entry *) entry;
4244 eh->offset = 0;
4245 eh->iter = 0;
4246 }
4247
4248 return entry;
4249 }
4250
4251 /* Create an entry in a ppc64 ELF linker hash table. */
4252
4253 static struct bfd_hash_entry *
4254 link_hash_newfunc (struct bfd_hash_entry *entry,
4255 struct bfd_hash_table *table,
4256 const char *string)
4257 {
4258 /* Allocate the structure if it has not already been allocated by a
4259 subclass. */
4260 if (entry == NULL)
4261 {
4262 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4263 if (entry == NULL)
4264 return entry;
4265 }
4266
4267 /* Call the allocation method of the superclass. */
4268 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4269 if (entry != NULL)
4270 {
4271 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4272
4273 memset (&eh->u.stub_cache, 0,
4274 (sizeof (struct ppc_link_hash_entry)
4275 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4276
4277 /* When making function calls, old ABI code references function entry
4278 points (dot symbols), while new ABI code references the function
4279 descriptor symbol. We need to make any combination of reference and
4280 definition work together, without breaking archive linking.
4281
4282 For a defined function "foo" and an undefined call to "bar":
4283 An old object defines "foo" and ".foo", references ".bar" (possibly
4284 "bar" too).
4285 A new object defines "foo" and references "bar".
4286
4287 A new object thus has no problem with its undefined symbols being
4288 satisfied by definitions in an old object. On the other hand, the
4289 old object won't have ".bar" satisfied by a new object.
4290
4291 Keep a list of newly added dot-symbols. */
4292
4293 if (string[0] == '.')
4294 {
4295 struct ppc_link_hash_table *htab;
4296
4297 htab = (struct ppc_link_hash_table *) table;
4298 eh->u.next_dot_sym = htab->dot_syms;
4299 htab->dot_syms = eh;
4300 }
4301 }
4302
4303 return entry;
4304 }
4305
4306 struct tocsave_entry {
4307 asection *sec;
4308 bfd_vma offset;
4309 };
4310
4311 static hashval_t
4312 tocsave_htab_hash (const void *p)
4313 {
4314 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4315 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4316 }
4317
4318 static int
4319 tocsave_htab_eq (const void *p1, const void *p2)
4320 {
4321 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4322 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4323 return e1->sec == e2->sec && e1->offset == e2->offset;
4324 }
4325
4326 /* Destroy a ppc64 ELF linker hash table. */
4327
4328 static void
4329 ppc64_elf_link_hash_table_free (bfd *obfd)
4330 {
4331 struct ppc_link_hash_table *htab;
4332
4333 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4334 if (htab->tocsave_htab)
4335 htab_delete (htab->tocsave_htab);
4336 bfd_hash_table_free (&htab->branch_hash_table);
4337 bfd_hash_table_free (&htab->stub_hash_table);
4338 _bfd_elf_link_hash_table_free (obfd);
4339 }
4340
4341 /* Create a ppc64 ELF linker hash table. */
4342
4343 static struct bfd_link_hash_table *
4344 ppc64_elf_link_hash_table_create (bfd *abfd)
4345 {
4346 struct ppc_link_hash_table *htab;
4347 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4348
4349 htab = bfd_zmalloc (amt);
4350 if (htab == NULL)
4351 return NULL;
4352
4353 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4354 sizeof (struct ppc_link_hash_entry),
4355 PPC64_ELF_DATA))
4356 {
4357 free (htab);
4358 return NULL;
4359 }
4360
4361 /* Init the stub hash table too. */
4362 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4363 sizeof (struct ppc_stub_hash_entry)))
4364 {
4365 _bfd_elf_link_hash_table_free (abfd);
4366 return NULL;
4367 }
4368
4369 /* And the branch hash table. */
4370 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4371 sizeof (struct ppc_branch_hash_entry)))
4372 {
4373 bfd_hash_table_free (&htab->stub_hash_table);
4374 _bfd_elf_link_hash_table_free (abfd);
4375 return NULL;
4376 }
4377
4378 htab->tocsave_htab = htab_try_create (1024,
4379 tocsave_htab_hash,
4380 tocsave_htab_eq,
4381 NULL);
4382 if (htab->tocsave_htab == NULL)
4383 {
4384 ppc64_elf_link_hash_table_free (abfd);
4385 return NULL;
4386 }
4387 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4388
4389 /* Initializing two fields of the union is just cosmetic. We really
4390 only care about glist, but when compiled on a 32-bit host the
4391 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4392 debugger inspection of these fields look nicer. */
4393 htab->elf.init_got_refcount.refcount = 0;
4394 htab->elf.init_got_refcount.glist = NULL;
4395 htab->elf.init_plt_refcount.refcount = 0;
4396 htab->elf.init_plt_refcount.glist = NULL;
4397 htab->elf.init_got_offset.offset = 0;
4398 htab->elf.init_got_offset.glist = NULL;
4399 htab->elf.init_plt_offset.offset = 0;
4400 htab->elf.init_plt_offset.glist = NULL;
4401
4402 return &htab->elf.root;
4403 }
4404
4405 /* Create sections for linker generated code. */
4406
4407 static bfd_boolean
4408 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4409 {
4410 struct ppc_link_hash_table *htab;
4411 flagword flags;
4412
4413 htab = ppc_hash_table (info);
4414
4415 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4416 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4417 if (htab->params->save_restore_funcs)
4418 {
4419 /* Create .sfpr for code to save and restore fp regs. */
4420 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4421 flags);
4422 if (htab->sfpr == NULL
4423 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4424 return FALSE;
4425 }
4426
4427 if (bfd_link_relocatable (info))
4428 return TRUE;
4429
4430 /* Create .glink for lazy dynamic linking support. */
4431 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4432 flags);
4433 if (htab->glink == NULL
4434 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4435 return FALSE;
4436
4437 if (!info->no_ld_generated_unwind_info)
4438 {
4439 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4440 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4441 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4442 ".eh_frame",
4443 flags);
4444 if (htab->glink_eh_frame == NULL
4445 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4446 return FALSE;
4447 }
4448
4449 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4450 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4451 if (htab->elf.iplt == NULL
4452 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4453 return FALSE;
4454
4455 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4456 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4457 htab->elf.irelplt
4458 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4459 if (htab->elf.irelplt == NULL
4460 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4461 return FALSE;
4462
4463 /* Create branch lookup table for plt_branch stubs. */
4464 flags = (SEC_ALLOC | SEC_LOAD
4465 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4466 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4467 flags);
4468 if (htab->brlt == NULL
4469 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4470 return FALSE;
4471
4472 if (!bfd_link_pic (info))
4473 return TRUE;
4474
4475 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4476 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4477 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4478 ".rela.branch_lt",
4479 flags);
4480 if (htab->relbrlt == NULL
4481 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4482 return FALSE;
4483
4484 return TRUE;
4485 }
4486
4487 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4488
4489 bfd_boolean
4490 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4491 struct ppc64_elf_params *params)
4492 {
4493 struct ppc_link_hash_table *htab;
4494
4495 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4496
4497 /* Always hook our dynamic sections into the first bfd, which is the
4498 linker created stub bfd. This ensures that the GOT header is at
4499 the start of the output TOC section. */
4500 htab = ppc_hash_table (info);
4501 htab->elf.dynobj = params->stub_bfd;
4502 htab->params = params;
4503
4504 return create_linkage_sections (htab->elf.dynobj, info);
4505 }
4506
4507 /* Build a name for an entry in the stub hash table. */
4508
4509 static char *
4510 ppc_stub_name (const asection *input_section,
4511 const asection *sym_sec,
4512 const struct ppc_link_hash_entry *h,
4513 const Elf_Internal_Rela *rel)
4514 {
4515 char *stub_name;
4516 ssize_t len;
4517
4518 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4519 offsets from a sym as a branch target? In fact, we could
4520 probably assume the addend is always zero. */
4521 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4522
4523 if (h)
4524 {
4525 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4526 stub_name = bfd_malloc (len);
4527 if (stub_name == NULL)
4528 return stub_name;
4529
4530 len = sprintf (stub_name, "%08x.%s+%x",
4531 input_section->id & 0xffffffff,
4532 h->elf.root.root.string,
4533 (int) rel->r_addend & 0xffffffff);
4534 }
4535 else
4536 {
4537 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4538 stub_name = bfd_malloc (len);
4539 if (stub_name == NULL)
4540 return stub_name;
4541
4542 len = sprintf (stub_name, "%08x.%x:%x+%x",
4543 input_section->id & 0xffffffff,
4544 sym_sec->id & 0xffffffff,
4545 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4546 (int) rel->r_addend & 0xffffffff);
4547 }
4548 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4549 stub_name[len - 2] = 0;
4550 return stub_name;
4551 }
4552
4553 /* Look up an entry in the stub hash. Stub entries are cached because
4554 creating the stub name takes a bit of time. */
4555
4556 static struct ppc_stub_hash_entry *
4557 ppc_get_stub_entry (const asection *input_section,
4558 const asection *sym_sec,
4559 struct ppc_link_hash_entry *h,
4560 const Elf_Internal_Rela *rel,
4561 struct ppc_link_hash_table *htab)
4562 {
4563 struct ppc_stub_hash_entry *stub_entry;
4564 struct map_stub *group;
4565
4566 /* If this input section is part of a group of sections sharing one
4567 stub section, then use the id of the first section in the group.
4568 Stub names need to include a section id, as there may well be
4569 more than one stub used to reach say, printf, and we need to
4570 distinguish between them. */
4571 group = htab->sec_info[input_section->id].u.group;
4572 if (group == NULL)
4573 return NULL;
4574
4575 if (h != NULL && h->u.stub_cache != NULL
4576 && h->u.stub_cache->h == h
4577 && h->u.stub_cache->group == group)
4578 {
4579 stub_entry = h->u.stub_cache;
4580 }
4581 else
4582 {
4583 char *stub_name;
4584
4585 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4586 if (stub_name == NULL)
4587 return NULL;
4588
4589 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4590 stub_name, FALSE, FALSE);
4591 if (h != NULL)
4592 h->u.stub_cache = stub_entry;
4593
4594 free (stub_name);
4595 }
4596
4597 return stub_entry;
4598 }
4599
4600 /* Add a new stub entry to the stub hash. Not all fields of the new
4601 stub entry are initialised. */
4602
4603 static struct ppc_stub_hash_entry *
4604 ppc_add_stub (const char *stub_name,
4605 asection *section,
4606 struct bfd_link_info *info)
4607 {
4608 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4609 struct map_stub *group;
4610 asection *link_sec;
4611 asection *stub_sec;
4612 struct ppc_stub_hash_entry *stub_entry;
4613
4614 group = htab->sec_info[section->id].u.group;
4615 link_sec = group->link_sec;
4616 stub_sec = group->stub_sec;
4617 if (stub_sec == NULL)
4618 {
4619 size_t namelen;
4620 bfd_size_type len;
4621 char *s_name;
4622
4623 namelen = strlen (link_sec->name);
4624 len = namelen + sizeof (STUB_SUFFIX);
4625 s_name = bfd_alloc (htab->params->stub_bfd, len);
4626 if (s_name == NULL)
4627 return NULL;
4628
4629 memcpy (s_name, link_sec->name, namelen);
4630 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4631 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4632 if (stub_sec == NULL)
4633 return NULL;
4634 group->stub_sec = stub_sec;
4635 }
4636
4637 /* Enter this entry into the linker stub hash table. */
4638 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4639 TRUE, FALSE);
4640 if (stub_entry == NULL)
4641 {
4642 /* xgettext:c-format */
4643 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4644 section->owner, stub_name);
4645 return NULL;
4646 }
4647
4648 stub_entry->group = group;
4649 stub_entry->stub_offset = 0;
4650 return stub_entry;
4651 }
4652
4653 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4654 not already done. */
4655
4656 static bfd_boolean
4657 create_got_section (bfd *abfd, struct bfd_link_info *info)
4658 {
4659 asection *got, *relgot;
4660 flagword flags;
4661 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4662
4663 if (!is_ppc64_elf (abfd))
4664 return FALSE;
4665 if (htab == NULL)
4666 return FALSE;
4667
4668 if (!htab->elf.sgot
4669 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4670 return FALSE;
4671
4672 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4673 | SEC_LINKER_CREATED);
4674
4675 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4676 if (!got
4677 || !bfd_set_section_alignment (abfd, got, 3))
4678 return FALSE;
4679
4680 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4681 flags | SEC_READONLY);
4682 if (!relgot
4683 || ! bfd_set_section_alignment (abfd, relgot, 3))
4684 return FALSE;
4685
4686 ppc64_elf_tdata (abfd)->got = got;
4687 ppc64_elf_tdata (abfd)->relgot = relgot;
4688 return TRUE;
4689 }
4690
4691 /* Follow indirect and warning symbol links. */
4692
4693 static inline struct bfd_link_hash_entry *
4694 follow_link (struct bfd_link_hash_entry *h)
4695 {
4696 while (h->type == bfd_link_hash_indirect
4697 || h->type == bfd_link_hash_warning)
4698 h = h->u.i.link;
4699 return h;
4700 }
4701
4702 static inline struct elf_link_hash_entry *
4703 elf_follow_link (struct elf_link_hash_entry *h)
4704 {
4705 return (struct elf_link_hash_entry *) follow_link (&h->root);
4706 }
4707
4708 static inline struct ppc_link_hash_entry *
4709 ppc_follow_link (struct ppc_link_hash_entry *h)
4710 {
4711 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4712 }
4713
4714 /* Merge PLT info on FROM with that on TO. */
4715
4716 static void
4717 move_plt_plist (struct ppc_link_hash_entry *from,
4718 struct ppc_link_hash_entry *to)
4719 {
4720 if (from->elf.plt.plist != NULL)
4721 {
4722 if (to->elf.plt.plist != NULL)
4723 {
4724 struct plt_entry **entp;
4725 struct plt_entry *ent;
4726
4727 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4728 {
4729 struct plt_entry *dent;
4730
4731 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4732 if (dent->addend == ent->addend)
4733 {
4734 dent->plt.refcount += ent->plt.refcount;
4735 *entp = ent->next;
4736 break;
4737 }
4738 if (dent == NULL)
4739 entp = &ent->next;
4740 }
4741 *entp = to->elf.plt.plist;
4742 }
4743
4744 to->elf.plt.plist = from->elf.plt.plist;
4745 from->elf.plt.plist = NULL;
4746 }
4747 }
4748
4749 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4750
4751 static void
4752 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4753 struct elf_link_hash_entry *dir,
4754 struct elf_link_hash_entry *ind)
4755 {
4756 struct ppc_link_hash_entry *edir, *eind;
4757
4758 edir = (struct ppc_link_hash_entry *) dir;
4759 eind = (struct ppc_link_hash_entry *) ind;
4760
4761 edir->is_func |= eind->is_func;
4762 edir->is_func_descriptor |= eind->is_func_descriptor;
4763 edir->tls_mask |= eind->tls_mask;
4764 if (eind->oh != NULL)
4765 edir->oh = ppc_follow_link (eind->oh);
4766
4767 /* If called to transfer flags for a weakdef during processing
4768 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4769 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4770 if (!(ELIMINATE_COPY_RELOCS
4771 && eind->elf.root.type != bfd_link_hash_indirect
4772 && edir->elf.dynamic_adjusted))
4773 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4774
4775 if (edir->elf.versioned != versioned_hidden)
4776 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4777 edir->elf.ref_regular |= eind->elf.ref_regular;
4778 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4779 edir->elf.needs_plt |= eind->elf.needs_plt;
4780 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4781
4782 /* If we were called to copy over info for a weak sym, don't copy
4783 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4784 in order to simplify readonly_dynrelocs and save a field in the
4785 symbol hash entry, but that means dyn_relocs can't be used in any
4786 tests about a specific symbol, or affect other symbol flags which
4787 are then tested.
4788 Chain weakdefs so we can get from the weakdef back to an alias.
4789 The list is circular so that we don't need to use u.weakdef as
4790 well as this list to look at all aliases. */
4791 if (eind->elf.root.type != bfd_link_hash_indirect)
4792 {
4793 struct ppc_link_hash_entry *cur, *add, *next;
4794
4795 add = eind;
4796 do
4797 {
4798 cur = edir->weakref;
4799 if (cur != NULL)
4800 {
4801 do
4802 {
4803 /* We can be called twice for the same symbols.
4804 Don't make multiple loops. */
4805 if (cur == add)
4806 return;
4807 cur = cur->weakref;
4808 } while (cur != edir);
4809 }
4810 next = add->weakref;
4811 if (cur != add)
4812 {
4813 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4814 edir->weakref = add;
4815 }
4816 add = next;
4817 } while (add != NULL && add != eind);
4818 return;
4819 }
4820
4821 /* Copy over any dynamic relocs we may have on the indirect sym. */
4822 if (eind->dyn_relocs != NULL)
4823 {
4824 if (edir->dyn_relocs != NULL)
4825 {
4826 struct elf_dyn_relocs **pp;
4827 struct elf_dyn_relocs *p;
4828
4829 /* Add reloc counts against the indirect sym to the direct sym
4830 list. Merge any entries against the same section. */
4831 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4832 {
4833 struct elf_dyn_relocs *q;
4834
4835 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4836 if (q->sec == p->sec)
4837 {
4838 q->pc_count += p->pc_count;
4839 q->count += p->count;
4840 *pp = p->next;
4841 break;
4842 }
4843 if (q == NULL)
4844 pp = &p->next;
4845 }
4846 *pp = edir->dyn_relocs;
4847 }
4848
4849 edir->dyn_relocs = eind->dyn_relocs;
4850 eind->dyn_relocs = NULL;
4851 }
4852
4853 /* Copy over got entries that we may have already seen to the
4854 symbol which just became indirect. */
4855 if (eind->elf.got.glist != NULL)
4856 {
4857 if (edir->elf.got.glist != NULL)
4858 {
4859 struct got_entry **entp;
4860 struct got_entry *ent;
4861
4862 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4863 {
4864 struct got_entry *dent;
4865
4866 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4867 if (dent->addend == ent->addend
4868 && dent->owner == ent->owner
4869 && dent->tls_type == ent->tls_type)
4870 {
4871 dent->got.refcount += ent->got.refcount;
4872 *entp = ent->next;
4873 break;
4874 }
4875 if (dent == NULL)
4876 entp = &ent->next;
4877 }
4878 *entp = edir->elf.got.glist;
4879 }
4880
4881 edir->elf.got.glist = eind->elf.got.glist;
4882 eind->elf.got.glist = NULL;
4883 }
4884
4885 /* And plt entries. */
4886 move_plt_plist (eind, edir);
4887
4888 if (eind->elf.dynindx != -1)
4889 {
4890 if (edir->elf.dynindx != -1)
4891 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4892 edir->elf.dynstr_index);
4893 edir->elf.dynindx = eind->elf.dynindx;
4894 edir->elf.dynstr_index = eind->elf.dynstr_index;
4895 eind->elf.dynindx = -1;
4896 eind->elf.dynstr_index = 0;
4897 }
4898 }
4899
4900 /* Find the function descriptor hash entry from the given function code
4901 hash entry FH. Link the entries via their OH fields. */
4902
4903 static struct ppc_link_hash_entry *
4904 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4905 {
4906 struct ppc_link_hash_entry *fdh = fh->oh;
4907
4908 if (fdh == NULL)
4909 {
4910 const char *fd_name = fh->elf.root.root.string + 1;
4911
4912 fdh = (struct ppc_link_hash_entry *)
4913 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4914 if (fdh == NULL)
4915 return fdh;
4916
4917 fdh->is_func_descriptor = 1;
4918 fdh->oh = fh;
4919 fh->is_func = 1;
4920 fh->oh = fdh;
4921 }
4922
4923 fdh = ppc_follow_link (fdh);
4924 fdh->is_func_descriptor = 1;
4925 fdh->oh = fh;
4926 return fdh;
4927 }
4928
4929 /* Make a fake function descriptor sym for the undefined code sym FH. */
4930
4931 static struct ppc_link_hash_entry *
4932 make_fdh (struct bfd_link_info *info,
4933 struct ppc_link_hash_entry *fh)
4934 {
4935 bfd *abfd = fh->elf.root.u.undef.abfd;
4936 struct bfd_link_hash_entry *bh = NULL;
4937 struct ppc_link_hash_entry *fdh;
4938 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4939 ? BSF_WEAK
4940 : BSF_GLOBAL);
4941
4942 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4943 fh->elf.root.root.string + 1,
4944 flags, bfd_und_section_ptr, 0,
4945 NULL, FALSE, FALSE, &bh))
4946 return NULL;
4947
4948 fdh = (struct ppc_link_hash_entry *) bh;
4949 fdh->elf.non_elf = 0;
4950 fdh->fake = 1;
4951 fdh->is_func_descriptor = 1;
4952 fdh->oh = fh;
4953 fh->is_func = 1;
4954 fh->oh = fdh;
4955 return fdh;
4956 }
4957
4958 /* Fix function descriptor symbols defined in .opd sections to be
4959 function type. */
4960
4961 static bfd_boolean
4962 ppc64_elf_add_symbol_hook (bfd *ibfd,
4963 struct bfd_link_info *info,
4964 Elf_Internal_Sym *isym,
4965 const char **name,
4966 flagword *flags ATTRIBUTE_UNUSED,
4967 asection **sec,
4968 bfd_vma *value)
4969 {
4970 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4971 && (ibfd->flags & DYNAMIC) == 0
4972 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4973 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4974
4975 if (*sec != NULL
4976 && strcmp ((*sec)->name, ".opd") == 0)
4977 {
4978 asection *code_sec;
4979
4980 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4981 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4982 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4983
4984 /* If the symbol is a function defined in .opd, and the function
4985 code is in a discarded group, let it appear to be undefined. */
4986 if (!bfd_link_relocatable (info)
4987 && (*sec)->reloc_count != 0
4988 && opd_entry_value (*sec, *value, &code_sec, NULL,
4989 FALSE) != (bfd_vma) -1
4990 && discarded_section (code_sec))
4991 {
4992 *sec = bfd_und_section_ptr;
4993 isym->st_shndx = SHN_UNDEF;
4994 }
4995 }
4996 else if (*sec != NULL
4997 && strcmp ((*sec)->name, ".toc") == 0
4998 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4999 {
5000 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5001 if (htab != NULL)
5002 htab->params->object_in_toc = 1;
5003 }
5004
5005 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5006 {
5007 if (abiversion (ibfd) == 0)
5008 set_abiversion (ibfd, 2);
5009 else if (abiversion (ibfd) == 1)
5010 {
5011 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5012 " for ABI version 1\n"), name);
5013 bfd_set_error (bfd_error_bad_value);
5014 return FALSE;
5015 }
5016 }
5017
5018 return TRUE;
5019 }
5020
5021 /* Merge non-visibility st_other attributes: local entry point. */
5022
5023 static void
5024 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5025 const Elf_Internal_Sym *isym,
5026 bfd_boolean definition,
5027 bfd_boolean dynamic)
5028 {
5029 if (definition && (!dynamic || !h->def_regular))
5030 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5031 | ELF_ST_VISIBILITY (h->other));
5032 }
5033
5034 /* Hook called on merging a symbol. We use this to clear "fake" since
5035 we now have a real symbol. */
5036
5037 static bfd_boolean
5038 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5039 const Elf_Internal_Sym *isym,
5040 asection **psec ATTRIBUTE_UNUSED,
5041 bfd_boolean newdef ATTRIBUTE_UNUSED,
5042 bfd_boolean olddef ATTRIBUTE_UNUSED,
5043 bfd *oldbfd ATTRIBUTE_UNUSED,
5044 const asection *oldsec ATTRIBUTE_UNUSED)
5045 {
5046 ((struct ppc_link_hash_entry *) h)->fake = 0;
5047 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5048 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5049 return TRUE;
5050 }
5051
5052 /* This function makes an old ABI object reference to ".bar" cause the
5053 inclusion of a new ABI object archive that defines "bar".
5054 NAME is a symbol defined in an archive. Return a symbol in the hash
5055 table that might be satisfied by the archive symbols. */
5056
5057 static struct elf_link_hash_entry *
5058 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5059 struct bfd_link_info *info,
5060 const char *name)
5061 {
5062 struct elf_link_hash_entry *h;
5063 char *dot_name;
5064 size_t len;
5065
5066 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5067 if (h != NULL
5068 /* Don't return this sym if it is a fake function descriptor
5069 created by add_symbol_adjust. */
5070 && !((struct ppc_link_hash_entry *) h)->fake)
5071 return h;
5072
5073 if (name[0] == '.')
5074 return h;
5075
5076 len = strlen (name);
5077 dot_name = bfd_alloc (abfd, len + 2);
5078 if (dot_name == NULL)
5079 return (struct elf_link_hash_entry *) 0 - 1;
5080 dot_name[0] = '.';
5081 memcpy (dot_name + 1, name, len + 1);
5082 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5083 bfd_release (abfd, dot_name);
5084 return h;
5085 }
5086
5087 /* This function satisfies all old ABI object references to ".bar" if a
5088 new ABI object defines "bar". Well, at least, undefined dot symbols
5089 are made weak. This stops later archive searches from including an
5090 object if we already have a function descriptor definition. It also
5091 prevents the linker complaining about undefined symbols.
5092 We also check and correct mismatched symbol visibility here. The
5093 most restrictive visibility of the function descriptor and the
5094 function entry symbol is used. */
5095
5096 static bfd_boolean
5097 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5098 {
5099 struct ppc_link_hash_table *htab;
5100 struct ppc_link_hash_entry *fdh;
5101
5102 if (eh->elf.root.type == bfd_link_hash_warning)
5103 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5104
5105 if (eh->elf.root.type == bfd_link_hash_indirect)
5106 return TRUE;
5107
5108 if (eh->elf.root.root.string[0] != '.')
5109 abort ();
5110
5111 htab = ppc_hash_table (info);
5112 if (htab == NULL)
5113 return FALSE;
5114
5115 fdh = lookup_fdh (eh, htab);
5116 if (fdh == NULL
5117 && !bfd_link_relocatable (info)
5118 && (eh->elf.root.type == bfd_link_hash_undefined
5119 || eh->elf.root.type == bfd_link_hash_undefweak)
5120 && eh->elf.ref_regular)
5121 {
5122 /* Make an undefined function descriptor sym, in order to
5123 pull in an --as-needed shared lib. Archives are handled
5124 elsewhere. */
5125 fdh = make_fdh (info, eh);
5126 if (fdh == NULL)
5127 return FALSE;
5128 }
5129
5130 if (fdh != NULL)
5131 {
5132 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5133 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5134
5135 /* Make both descriptor and entry symbol have the most
5136 constraining visibility of either symbol. */
5137 if (entry_vis < descr_vis)
5138 fdh->elf.other += entry_vis - descr_vis;
5139 else if (entry_vis > descr_vis)
5140 eh->elf.other += descr_vis - entry_vis;
5141
5142 /* Propagate reference flags from entry symbol to function
5143 descriptor symbol. */
5144 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5145 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5146 fdh->elf.ref_regular |= eh->elf.ref_regular;
5147 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5148
5149 if (!fdh->elf.forced_local
5150 && fdh->elf.dynindx == -1
5151 && fdh->elf.versioned != versioned_hidden
5152 && (bfd_link_dll (info)
5153 || fdh->elf.def_dynamic
5154 || fdh->elf.ref_dynamic)
5155 && (eh->elf.ref_regular
5156 || eh->elf.def_regular))
5157 {
5158 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5159 return FALSE;
5160 }
5161 }
5162
5163 return TRUE;
5164 }
5165
5166 /* Set up opd section info and abiversion for IBFD, and process list
5167 of dot-symbols we made in link_hash_newfunc. */
5168
5169 static bfd_boolean
5170 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5171 {
5172 struct ppc_link_hash_table *htab;
5173 struct ppc_link_hash_entry **p, *eh;
5174 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5175
5176 if (opd != NULL && opd->size != 0)
5177 {
5178 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5179 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5180
5181 if (abiversion (ibfd) == 0)
5182 set_abiversion (ibfd, 1);
5183 else if (abiversion (ibfd) >= 2)
5184 {
5185 /* xgettext:c-format */
5186 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5187 " version %d\n"),
5188 ibfd, abiversion (ibfd));
5189 bfd_set_error (bfd_error_bad_value);
5190 return FALSE;
5191 }
5192 }
5193
5194 if (is_ppc64_elf (info->output_bfd))
5195 {
5196 /* For input files without an explicit abiversion in e_flags
5197 we should have flagged any with symbol st_other bits set
5198 as ELFv1 and above flagged those with .opd as ELFv2.
5199 Set the output abiversion if not yet set, and for any input
5200 still ambiguous, take its abiversion from the output.
5201 Differences in ABI are reported later. */
5202 if (abiversion (info->output_bfd) == 0)
5203 set_abiversion (info->output_bfd, abiversion (ibfd));
5204 else if (abiversion (ibfd) == 0)
5205 set_abiversion (ibfd, abiversion (info->output_bfd));
5206 }
5207
5208 htab = ppc_hash_table (info);
5209 if (htab == NULL)
5210 return TRUE;
5211
5212 if (opd != NULL && opd->size != 0
5213 && (ibfd->flags & DYNAMIC) == 0
5214 && (opd->flags & SEC_RELOC) != 0
5215 && opd->reloc_count != 0
5216 && !bfd_is_abs_section (opd->output_section)
5217 && info->gc_sections)
5218 {
5219 /* Garbage collection needs some extra help with .opd sections.
5220 We don't want to necessarily keep everything referenced by
5221 relocs in .opd, as that would keep all functions. Instead,
5222 if we reference an .opd symbol (a function descriptor), we
5223 want to keep the function code symbol's section. This is
5224 easy for global symbols, but for local syms we need to keep
5225 information about the associated function section. */
5226 bfd_size_type amt;
5227 asection **opd_sym_map;
5228 Elf_Internal_Shdr *symtab_hdr;
5229 Elf_Internal_Rela *relocs, *rel_end, *rel;
5230
5231 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5232 opd_sym_map = bfd_zalloc (ibfd, amt);
5233 if (opd_sym_map == NULL)
5234 return FALSE;
5235 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5236 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5237 info->keep_memory);
5238 if (relocs == NULL)
5239 return FALSE;
5240 symtab_hdr = &elf_symtab_hdr (ibfd);
5241 rel_end = relocs + opd->reloc_count - 1;
5242 for (rel = relocs; rel < rel_end; rel++)
5243 {
5244 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5245 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5246
5247 if (r_type == R_PPC64_ADDR64
5248 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5249 && r_symndx < symtab_hdr->sh_info)
5250 {
5251 Elf_Internal_Sym *isym;
5252 asection *s;
5253
5254 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5255 if (isym == NULL)
5256 {
5257 if (elf_section_data (opd)->relocs != relocs)
5258 free (relocs);
5259 return FALSE;
5260 }
5261
5262 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5263 if (s != NULL && s != opd)
5264 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5265 }
5266 }
5267 if (elf_section_data (opd)->relocs != relocs)
5268 free (relocs);
5269 }
5270
5271 p = &htab->dot_syms;
5272 while ((eh = *p) != NULL)
5273 {
5274 *p = NULL;
5275 if (&eh->elf == htab->elf.hgot)
5276 ;
5277 else if (htab->elf.hgot == NULL
5278 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5279 htab->elf.hgot = &eh->elf;
5280 else if (abiversion (ibfd) <= 1)
5281 {
5282 htab->need_func_desc_adj = 1;
5283 if (!add_symbol_adjust (eh, info))
5284 return FALSE;
5285 }
5286 p = &eh->u.next_dot_sym;
5287 }
5288 return TRUE;
5289 }
5290
5291 /* Undo hash table changes when an --as-needed input file is determined
5292 not to be needed. */
5293
5294 static bfd_boolean
5295 ppc64_elf_notice_as_needed (bfd *ibfd,
5296 struct bfd_link_info *info,
5297 enum notice_asneeded_action act)
5298 {
5299 if (act == notice_not_needed)
5300 {
5301 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5302
5303 if (htab == NULL)
5304 return FALSE;
5305
5306 htab->dot_syms = NULL;
5307 }
5308 return _bfd_elf_notice_as_needed (ibfd, info, act);
5309 }
5310
5311 /* If --just-symbols against a final linked binary, then assume we need
5312 toc adjusting stubs when calling functions defined there. */
5313
5314 static void
5315 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5316 {
5317 if ((sec->flags & SEC_CODE) != 0
5318 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5319 && is_ppc64_elf (sec->owner))
5320 {
5321 if (abiversion (sec->owner) >= 2
5322 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5323 sec->has_toc_reloc = 1;
5324 }
5325 _bfd_elf_link_just_syms (sec, info);
5326 }
5327
5328 static struct plt_entry **
5329 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5330 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5331 {
5332 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5333 struct plt_entry **local_plt;
5334 unsigned char *local_got_tls_masks;
5335
5336 if (local_got_ents == NULL)
5337 {
5338 bfd_size_type size = symtab_hdr->sh_info;
5339
5340 size *= (sizeof (*local_got_ents)
5341 + sizeof (*local_plt)
5342 + sizeof (*local_got_tls_masks));
5343 local_got_ents = bfd_zalloc (abfd, size);
5344 if (local_got_ents == NULL)
5345 return NULL;
5346 elf_local_got_ents (abfd) = local_got_ents;
5347 }
5348
5349 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5350 {
5351 struct got_entry *ent;
5352
5353 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5354 if (ent->addend == r_addend
5355 && ent->owner == abfd
5356 && ent->tls_type == tls_type)
5357 break;
5358 if (ent == NULL)
5359 {
5360 bfd_size_type amt = sizeof (*ent);
5361 ent = bfd_alloc (abfd, amt);
5362 if (ent == NULL)
5363 return FALSE;
5364 ent->next = local_got_ents[r_symndx];
5365 ent->addend = r_addend;
5366 ent->owner = abfd;
5367 ent->tls_type = tls_type;
5368 ent->is_indirect = FALSE;
5369 ent->got.refcount = 0;
5370 local_got_ents[r_symndx] = ent;
5371 }
5372 ent->got.refcount += 1;
5373 }
5374
5375 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5376 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5377 local_got_tls_masks[r_symndx] |= tls_type;
5378
5379 return local_plt + r_symndx;
5380 }
5381
5382 static bfd_boolean
5383 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5384 {
5385 struct plt_entry *ent;
5386
5387 for (ent = *plist; ent != NULL; ent = ent->next)
5388 if (ent->addend == addend)
5389 break;
5390 if (ent == NULL)
5391 {
5392 bfd_size_type amt = sizeof (*ent);
5393 ent = bfd_alloc (abfd, amt);
5394 if (ent == NULL)
5395 return FALSE;
5396 ent->next = *plist;
5397 ent->addend = addend;
5398 ent->plt.refcount = 0;
5399 *plist = ent;
5400 }
5401 ent->plt.refcount += 1;
5402 return TRUE;
5403 }
5404
5405 static bfd_boolean
5406 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5407 {
5408 return (r_type == R_PPC64_REL24
5409 || r_type == R_PPC64_REL14
5410 || r_type == R_PPC64_REL14_BRTAKEN
5411 || r_type == R_PPC64_REL14_BRNTAKEN
5412 || r_type == R_PPC64_ADDR24
5413 || r_type == R_PPC64_ADDR14
5414 || r_type == R_PPC64_ADDR14_BRTAKEN
5415 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5416 }
5417
5418 /* Look through the relocs for a section during the first phase, and
5419 calculate needed space in the global offset table, procedure
5420 linkage table, and dynamic reloc sections. */
5421
5422 static bfd_boolean
5423 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5424 asection *sec, const Elf_Internal_Rela *relocs)
5425 {
5426 struct ppc_link_hash_table *htab;
5427 Elf_Internal_Shdr *symtab_hdr;
5428 struct elf_link_hash_entry **sym_hashes;
5429 const Elf_Internal_Rela *rel;
5430 const Elf_Internal_Rela *rel_end;
5431 asection *sreloc;
5432 struct elf_link_hash_entry *tga, *dottga;
5433 bfd_boolean is_opd;
5434
5435 if (bfd_link_relocatable (info))
5436 return TRUE;
5437
5438 /* Don't do anything special with non-loaded, non-alloced sections.
5439 In particular, any relocs in such sections should not affect GOT
5440 and PLT reference counting (ie. we don't allow them to create GOT
5441 or PLT entries), there's no possibility or desire to optimize TLS
5442 relocs, and there's not much point in propagating relocs to shared
5443 libs that the dynamic linker won't relocate. */
5444 if ((sec->flags & SEC_ALLOC) == 0)
5445 return TRUE;
5446
5447 BFD_ASSERT (is_ppc64_elf (abfd));
5448
5449 htab = ppc_hash_table (info);
5450 if (htab == NULL)
5451 return FALSE;
5452
5453 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5454 FALSE, FALSE, TRUE);
5455 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5456 FALSE, FALSE, TRUE);
5457 symtab_hdr = &elf_symtab_hdr (abfd);
5458 sym_hashes = elf_sym_hashes (abfd);
5459 sreloc = NULL;
5460 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5461 rel_end = relocs + sec->reloc_count;
5462 for (rel = relocs; rel < rel_end; rel++)
5463 {
5464 unsigned long r_symndx;
5465 struct elf_link_hash_entry *h;
5466 enum elf_ppc64_reloc_type r_type;
5467 int tls_type;
5468 struct _ppc64_elf_section_data *ppc64_sec;
5469 struct plt_entry **ifunc, **plt_list;
5470
5471 r_symndx = ELF64_R_SYM (rel->r_info);
5472 if (r_symndx < symtab_hdr->sh_info)
5473 h = NULL;
5474 else
5475 {
5476 struct ppc_link_hash_entry *eh;
5477
5478 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5479 h = elf_follow_link (h);
5480 eh = (struct ppc_link_hash_entry *) h;
5481
5482 /* PR15323, ref flags aren't set for references in the same
5483 object. */
5484 h->root.non_ir_ref_regular = 1;
5485 if (eh->is_func && eh->oh != NULL)
5486 eh->oh->elf.root.non_ir_ref_regular = 1;
5487
5488 if (h == htab->elf.hgot)
5489 sec->has_toc_reloc = 1;
5490 }
5491
5492 tls_type = 0;
5493 ifunc = NULL;
5494 if (h != NULL)
5495 {
5496 if (h->type == STT_GNU_IFUNC)
5497 {
5498 h->needs_plt = 1;
5499 ifunc = &h->plt.plist;
5500 }
5501 }
5502 else
5503 {
5504 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5505 abfd, r_symndx);
5506 if (isym == NULL)
5507 return FALSE;
5508
5509 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5510 {
5511 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5512 rel->r_addend, PLT_IFUNC);
5513 if (ifunc == NULL)
5514 return FALSE;
5515 }
5516 }
5517
5518 r_type = ELF64_R_TYPE (rel->r_info);
5519 switch (r_type)
5520 {
5521 case R_PPC64_TLSGD:
5522 case R_PPC64_TLSLD:
5523 /* These special tls relocs tie a call to __tls_get_addr with
5524 its parameter symbol. */
5525 break;
5526
5527 case R_PPC64_GOT_TLSLD16:
5528 case R_PPC64_GOT_TLSLD16_LO:
5529 case R_PPC64_GOT_TLSLD16_HI:
5530 case R_PPC64_GOT_TLSLD16_HA:
5531 tls_type = TLS_TLS | TLS_LD;
5532 goto dogottls;
5533
5534 case R_PPC64_GOT_TLSGD16:
5535 case R_PPC64_GOT_TLSGD16_LO:
5536 case R_PPC64_GOT_TLSGD16_HI:
5537 case R_PPC64_GOT_TLSGD16_HA:
5538 tls_type = TLS_TLS | TLS_GD;
5539 goto dogottls;
5540
5541 case R_PPC64_GOT_TPREL16_DS:
5542 case R_PPC64_GOT_TPREL16_LO_DS:
5543 case R_PPC64_GOT_TPREL16_HI:
5544 case R_PPC64_GOT_TPREL16_HA:
5545 if (bfd_link_dll (info))
5546 info->flags |= DF_STATIC_TLS;
5547 tls_type = TLS_TLS | TLS_TPREL;
5548 goto dogottls;
5549
5550 case R_PPC64_GOT_DTPREL16_DS:
5551 case R_PPC64_GOT_DTPREL16_LO_DS:
5552 case R_PPC64_GOT_DTPREL16_HI:
5553 case R_PPC64_GOT_DTPREL16_HA:
5554 tls_type = TLS_TLS | TLS_DTPREL;
5555 dogottls:
5556 sec->has_tls_reloc = 1;
5557 /* Fall through */
5558
5559 case R_PPC64_GOT16:
5560 case R_PPC64_GOT16_DS:
5561 case R_PPC64_GOT16_HA:
5562 case R_PPC64_GOT16_HI:
5563 case R_PPC64_GOT16_LO:
5564 case R_PPC64_GOT16_LO_DS:
5565 /* This symbol requires a global offset table entry. */
5566 sec->has_toc_reloc = 1;
5567 if (r_type == R_PPC64_GOT_TLSLD16
5568 || r_type == R_PPC64_GOT_TLSGD16
5569 || r_type == R_PPC64_GOT_TPREL16_DS
5570 || r_type == R_PPC64_GOT_DTPREL16_DS
5571 || r_type == R_PPC64_GOT16
5572 || r_type == R_PPC64_GOT16_DS)
5573 {
5574 htab->do_multi_toc = 1;
5575 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5576 }
5577
5578 if (ppc64_elf_tdata (abfd)->got == NULL
5579 && !create_got_section (abfd, info))
5580 return FALSE;
5581
5582 if (h != NULL)
5583 {
5584 struct ppc_link_hash_entry *eh;
5585 struct got_entry *ent;
5586
5587 eh = (struct ppc_link_hash_entry *) h;
5588 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5589 if (ent->addend == rel->r_addend
5590 && ent->owner == abfd
5591 && ent->tls_type == tls_type)
5592 break;
5593 if (ent == NULL)
5594 {
5595 bfd_size_type amt = sizeof (*ent);
5596 ent = bfd_alloc (abfd, amt);
5597 if (ent == NULL)
5598 return FALSE;
5599 ent->next = eh->elf.got.glist;
5600 ent->addend = rel->r_addend;
5601 ent->owner = abfd;
5602 ent->tls_type = tls_type;
5603 ent->is_indirect = FALSE;
5604 ent->got.refcount = 0;
5605 eh->elf.got.glist = ent;
5606 }
5607 ent->got.refcount += 1;
5608 eh->tls_mask |= tls_type;
5609 }
5610 else
5611 /* This is a global offset table entry for a local symbol. */
5612 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5613 rel->r_addend, tls_type))
5614 return FALSE;
5615
5616 /* We may also need a plt entry if the symbol turns out to be
5617 an ifunc. */
5618 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5619 {
5620 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5621 return FALSE;
5622 }
5623 break;
5624
5625 case R_PPC64_PLT16_HA:
5626 case R_PPC64_PLT16_HI:
5627 case R_PPC64_PLT16_LO:
5628 case R_PPC64_PLT32:
5629 case R_PPC64_PLT64:
5630 /* This symbol requires a procedure linkage table entry. */
5631 plt_list = ifunc;
5632 if (h != NULL)
5633 {
5634 h->needs_plt = 1;
5635 if (h->root.root.string[0] == '.'
5636 && h->root.root.string[1] != '\0')
5637 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5638 plt_list = &h->plt.plist;
5639 }
5640 if (plt_list == NULL)
5641 {
5642 /* It does not make sense to have a procedure linkage
5643 table entry for a non-ifunc local symbol. */
5644 info->callbacks->einfo
5645 /* xgettext:c-format */
5646 (_("%H: %s reloc against local symbol\n"),
5647 abfd, sec, rel->r_offset,
5648 ppc64_elf_howto_table[r_type]->name);
5649 bfd_set_error (bfd_error_bad_value);
5650 return FALSE;
5651 }
5652 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5653 return FALSE;
5654 break;
5655
5656 /* The following relocations don't need to propagate the
5657 relocation if linking a shared object since they are
5658 section relative. */
5659 case R_PPC64_SECTOFF:
5660 case R_PPC64_SECTOFF_LO:
5661 case R_PPC64_SECTOFF_HI:
5662 case R_PPC64_SECTOFF_HA:
5663 case R_PPC64_SECTOFF_DS:
5664 case R_PPC64_SECTOFF_LO_DS:
5665 case R_PPC64_DTPREL16:
5666 case R_PPC64_DTPREL16_LO:
5667 case R_PPC64_DTPREL16_HI:
5668 case R_PPC64_DTPREL16_HA:
5669 case R_PPC64_DTPREL16_DS:
5670 case R_PPC64_DTPREL16_LO_DS:
5671 case R_PPC64_DTPREL16_HIGH:
5672 case R_PPC64_DTPREL16_HIGHA:
5673 case R_PPC64_DTPREL16_HIGHER:
5674 case R_PPC64_DTPREL16_HIGHERA:
5675 case R_PPC64_DTPREL16_HIGHEST:
5676 case R_PPC64_DTPREL16_HIGHESTA:
5677 break;
5678
5679 /* Nor do these. */
5680 case R_PPC64_REL16:
5681 case R_PPC64_REL16_LO:
5682 case R_PPC64_REL16_HI:
5683 case R_PPC64_REL16_HA:
5684 case R_PPC64_REL16DX_HA:
5685 break;
5686
5687 /* Not supported as a dynamic relocation. */
5688 case R_PPC64_ADDR64_LOCAL:
5689 if (bfd_link_pic (info))
5690 {
5691 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5692 ppc_howto_init ();
5693 /* xgettext:c-format */
5694 info->callbacks->einfo (_("%H: %s reloc unsupported "
5695 "in shared libraries and PIEs.\n"),
5696 abfd, sec, rel->r_offset,
5697 ppc64_elf_howto_table[r_type]->name);
5698 bfd_set_error (bfd_error_bad_value);
5699 return FALSE;
5700 }
5701 break;
5702
5703 case R_PPC64_TOC16:
5704 case R_PPC64_TOC16_DS:
5705 htab->do_multi_toc = 1;
5706 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5707 /* Fall through. */
5708 case R_PPC64_TOC16_LO:
5709 case R_PPC64_TOC16_HI:
5710 case R_PPC64_TOC16_HA:
5711 case R_PPC64_TOC16_LO_DS:
5712 sec->has_toc_reloc = 1;
5713 break;
5714
5715 /* Marker reloc. */
5716 case R_PPC64_ENTRY:
5717 break;
5718
5719 /* This relocation describes the C++ object vtable hierarchy.
5720 Reconstruct it for later use during GC. */
5721 case R_PPC64_GNU_VTINHERIT:
5722 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5723 return FALSE;
5724 break;
5725
5726 /* This relocation describes which C++ vtable entries are actually
5727 used. Record for later use during GC. */
5728 case R_PPC64_GNU_VTENTRY:
5729 BFD_ASSERT (h != NULL);
5730 if (h != NULL
5731 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5732 return FALSE;
5733 break;
5734
5735 case R_PPC64_REL14:
5736 case R_PPC64_REL14_BRTAKEN:
5737 case R_PPC64_REL14_BRNTAKEN:
5738 {
5739 asection *dest = NULL;
5740
5741 /* Heuristic: If jumping outside our section, chances are
5742 we are going to need a stub. */
5743 if (h != NULL)
5744 {
5745 /* If the sym is weak it may be overridden later, so
5746 don't assume we know where a weak sym lives. */
5747 if (h->root.type == bfd_link_hash_defined)
5748 dest = h->root.u.def.section;
5749 }
5750 else
5751 {
5752 Elf_Internal_Sym *isym;
5753
5754 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5755 abfd, r_symndx);
5756 if (isym == NULL)
5757 return FALSE;
5758
5759 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5760 }
5761
5762 if (dest != sec)
5763 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5764 }
5765 /* Fall through. */
5766
5767 case R_PPC64_REL24:
5768 plt_list = ifunc;
5769 if (h != NULL)
5770 {
5771 h->needs_plt = 1;
5772 if (h->root.root.string[0] == '.'
5773 && h->root.root.string[1] != '\0')
5774 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5775
5776 if (h == tga || h == dottga)
5777 {
5778 sec->has_tls_reloc = 1;
5779 if (rel != relocs
5780 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5781 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5782 /* We have a new-style __tls_get_addr call with
5783 a marker reloc. */
5784 ;
5785 else
5786 /* Mark this section as having an old-style call. */
5787 sec->has_tls_get_addr_call = 1;
5788 }
5789 plt_list = &h->plt.plist;
5790 }
5791
5792 /* We may need a .plt entry if the function this reloc
5793 refers to is in a shared lib. */
5794 if (plt_list
5795 && !update_plt_info (abfd, plt_list, rel->r_addend))
5796 return FALSE;
5797 break;
5798
5799 case R_PPC64_ADDR14:
5800 case R_PPC64_ADDR14_BRNTAKEN:
5801 case R_PPC64_ADDR14_BRTAKEN:
5802 case R_PPC64_ADDR24:
5803 goto dodyn;
5804
5805 case R_PPC64_TPREL64:
5806 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5807 if (bfd_link_dll (info))
5808 info->flags |= DF_STATIC_TLS;
5809 goto dotlstoc;
5810
5811 case R_PPC64_DTPMOD64:
5812 if (rel + 1 < rel_end
5813 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5814 && rel[1].r_offset == rel->r_offset + 8)
5815 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5816 else
5817 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5818 goto dotlstoc;
5819
5820 case R_PPC64_DTPREL64:
5821 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5822 if (rel != relocs
5823 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5824 && rel[-1].r_offset == rel->r_offset - 8)
5825 /* This is the second reloc of a dtpmod, dtprel pair.
5826 Don't mark with TLS_DTPREL. */
5827 goto dodyn;
5828
5829 dotlstoc:
5830 sec->has_tls_reloc = 1;
5831 if (h != NULL)
5832 {
5833 struct ppc_link_hash_entry *eh;
5834 eh = (struct ppc_link_hash_entry *) h;
5835 eh->tls_mask |= tls_type;
5836 }
5837 else
5838 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5839 rel->r_addend, tls_type))
5840 return FALSE;
5841
5842 ppc64_sec = ppc64_elf_section_data (sec);
5843 if (ppc64_sec->sec_type != sec_toc)
5844 {
5845 bfd_size_type amt;
5846
5847 /* One extra to simplify get_tls_mask. */
5848 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5849 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5850 if (ppc64_sec->u.toc.symndx == NULL)
5851 return FALSE;
5852 amt = sec->size * sizeof (bfd_vma) / 8;
5853 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5854 if (ppc64_sec->u.toc.add == NULL)
5855 return FALSE;
5856 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5857 ppc64_sec->sec_type = sec_toc;
5858 }
5859 BFD_ASSERT (rel->r_offset % 8 == 0);
5860 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5861 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5862
5863 /* Mark the second slot of a GD or LD entry.
5864 -1 to indicate GD and -2 to indicate LD. */
5865 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5866 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5867 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5868 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5869 goto dodyn;
5870
5871 case R_PPC64_TPREL16:
5872 case R_PPC64_TPREL16_LO:
5873 case R_PPC64_TPREL16_HI:
5874 case R_PPC64_TPREL16_HA:
5875 case R_PPC64_TPREL16_DS:
5876 case R_PPC64_TPREL16_LO_DS:
5877 case R_PPC64_TPREL16_HIGH:
5878 case R_PPC64_TPREL16_HIGHA:
5879 case R_PPC64_TPREL16_HIGHER:
5880 case R_PPC64_TPREL16_HIGHERA:
5881 case R_PPC64_TPREL16_HIGHEST:
5882 case R_PPC64_TPREL16_HIGHESTA:
5883 if (bfd_link_dll (info))
5884 info->flags |= DF_STATIC_TLS;
5885 goto dodyn;
5886
5887 case R_PPC64_ADDR64:
5888 if (is_opd
5889 && rel + 1 < rel_end
5890 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5891 {
5892 if (h != NULL)
5893 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5894 }
5895 /* Fall through. */
5896
5897 case R_PPC64_ADDR16:
5898 case R_PPC64_ADDR16_DS:
5899 case R_PPC64_ADDR16_HA:
5900 case R_PPC64_ADDR16_HI:
5901 case R_PPC64_ADDR16_HIGH:
5902 case R_PPC64_ADDR16_HIGHA:
5903 case R_PPC64_ADDR16_HIGHER:
5904 case R_PPC64_ADDR16_HIGHERA:
5905 case R_PPC64_ADDR16_HIGHEST:
5906 case R_PPC64_ADDR16_HIGHESTA:
5907 case R_PPC64_ADDR16_LO:
5908 case R_PPC64_ADDR16_LO_DS:
5909 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5910 && rel->r_addend == 0)
5911 {
5912 /* We may need a .plt entry if this reloc refers to a
5913 function in a shared lib. */
5914 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5915 return FALSE;
5916 h->pointer_equality_needed = 1;
5917 }
5918 /* Fall through. */
5919
5920 case R_PPC64_REL30:
5921 case R_PPC64_REL32:
5922 case R_PPC64_REL64:
5923 case R_PPC64_ADDR32:
5924 case R_PPC64_UADDR16:
5925 case R_PPC64_UADDR32:
5926 case R_PPC64_UADDR64:
5927 case R_PPC64_TOC:
5928 if (h != NULL && !bfd_link_pic (info))
5929 /* We may need a copy reloc. */
5930 h->non_got_ref = 1;
5931
5932 /* Don't propagate .opd relocs. */
5933 if (NO_OPD_RELOCS && is_opd)
5934 break;
5935
5936 /* If we are creating a shared library, and this is a reloc
5937 against a global symbol, or a non PC relative reloc
5938 against a local symbol, then we need to copy the reloc
5939 into the shared library. However, if we are linking with
5940 -Bsymbolic, we do not need to copy a reloc against a
5941 global symbol which is defined in an object we are
5942 including in the link (i.e., DEF_REGULAR is set). At
5943 this point we have not seen all the input files, so it is
5944 possible that DEF_REGULAR is not set now but will be set
5945 later (it is never cleared). In case of a weak definition,
5946 DEF_REGULAR may be cleared later by a strong definition in
5947 a shared library. We account for that possibility below by
5948 storing information in the dyn_relocs field of the hash
5949 table entry. A similar situation occurs when creating
5950 shared libraries and symbol visibility changes render the
5951 symbol local.
5952
5953 If on the other hand, we are creating an executable, we
5954 may need to keep relocations for symbols satisfied by a
5955 dynamic library if we manage to avoid copy relocs for the
5956 symbol. */
5957 dodyn:
5958 if ((bfd_link_pic (info)
5959 && (must_be_dyn_reloc (info, r_type)
5960 || (h != NULL
5961 && (!SYMBOLIC_BIND (info, h)
5962 || h->root.type == bfd_link_hash_defweak
5963 || !h->def_regular))))
5964 || (ELIMINATE_COPY_RELOCS
5965 && !bfd_link_pic (info)
5966 && h != NULL
5967 && (h->root.type == bfd_link_hash_defweak
5968 || !h->def_regular))
5969 || (!bfd_link_pic (info)
5970 && ifunc != NULL))
5971 {
5972 /* We must copy these reloc types into the output file.
5973 Create a reloc section in dynobj and make room for
5974 this reloc. */
5975 if (sreloc == NULL)
5976 {
5977 sreloc = _bfd_elf_make_dynamic_reloc_section
5978 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5979
5980 if (sreloc == NULL)
5981 return FALSE;
5982 }
5983
5984 /* If this is a global symbol, we count the number of
5985 relocations we need for this symbol. */
5986 if (h != NULL)
5987 {
5988 struct elf_dyn_relocs *p;
5989 struct elf_dyn_relocs **head;
5990
5991 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5992 p = *head;
5993 if (p == NULL || p->sec != sec)
5994 {
5995 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5996 if (p == NULL)
5997 return FALSE;
5998 p->next = *head;
5999 *head = p;
6000 p->sec = sec;
6001 p->count = 0;
6002 p->pc_count = 0;
6003 }
6004 p->count += 1;
6005 if (!must_be_dyn_reloc (info, r_type))
6006 p->pc_count += 1;
6007 }
6008 else
6009 {
6010 /* Track dynamic relocs needed for local syms too.
6011 We really need local syms available to do this
6012 easily. Oh well. */
6013 struct ppc_dyn_relocs *p;
6014 struct ppc_dyn_relocs **head;
6015 bfd_boolean is_ifunc;
6016 asection *s;
6017 void *vpp;
6018 Elf_Internal_Sym *isym;
6019
6020 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6021 abfd, r_symndx);
6022 if (isym == NULL)
6023 return FALSE;
6024
6025 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6026 if (s == NULL)
6027 s = sec;
6028
6029 vpp = &elf_section_data (s)->local_dynrel;
6030 head = (struct ppc_dyn_relocs **) vpp;
6031 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6032 p = *head;
6033 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6034 p = p->next;
6035 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6036 {
6037 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6038 if (p == NULL)
6039 return FALSE;
6040 p->next = *head;
6041 *head = p;
6042 p->sec = sec;
6043 p->ifunc = is_ifunc;
6044 p->count = 0;
6045 }
6046 p->count += 1;
6047 }
6048 }
6049 break;
6050
6051 default:
6052 break;
6053 }
6054 }
6055
6056 return TRUE;
6057 }
6058
6059 /* Merge backend specific data from an object file to the output
6060 object file when linking. */
6061
6062 static bfd_boolean
6063 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6064 {
6065 bfd *obfd = info->output_bfd;
6066 unsigned long iflags, oflags;
6067
6068 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6069 return TRUE;
6070
6071 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6072 return TRUE;
6073
6074 if (!_bfd_generic_verify_endian_match (ibfd, info))
6075 return FALSE;
6076
6077 iflags = elf_elfheader (ibfd)->e_flags;
6078 oflags = elf_elfheader (obfd)->e_flags;
6079
6080 if (iflags & ~EF_PPC64_ABI)
6081 {
6082 _bfd_error_handler
6083 /* xgettext:c-format */
6084 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6085 bfd_set_error (bfd_error_bad_value);
6086 return FALSE;
6087 }
6088 else if (iflags != oflags && iflags != 0)
6089 {
6090 _bfd_error_handler
6091 /* xgettext:c-format */
6092 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6093 ibfd, iflags, oflags);
6094 bfd_set_error (bfd_error_bad_value);
6095 return FALSE;
6096 }
6097
6098 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6099
6100 /* Merge Tag_compatibility attributes and any common GNU ones. */
6101 _bfd_elf_merge_object_attributes (ibfd, info);
6102
6103 return TRUE;
6104 }
6105
6106 static bfd_boolean
6107 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6108 {
6109 /* Print normal ELF private data. */
6110 _bfd_elf_print_private_bfd_data (abfd, ptr);
6111
6112 if (elf_elfheader (abfd)->e_flags != 0)
6113 {
6114 FILE *file = ptr;
6115
6116 fprintf (file, _("private flags = 0x%lx:"),
6117 elf_elfheader (abfd)->e_flags);
6118
6119 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6120 fprintf (file, _(" [abiv%ld]"),
6121 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6122 fputc ('\n', file);
6123 }
6124
6125 return TRUE;
6126 }
6127
6128 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6129 of the code entry point, and its section, which must be in the same
6130 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6131
6132 static bfd_vma
6133 opd_entry_value (asection *opd_sec,
6134 bfd_vma offset,
6135 asection **code_sec,
6136 bfd_vma *code_off,
6137 bfd_boolean in_code_sec)
6138 {
6139 bfd *opd_bfd = opd_sec->owner;
6140 Elf_Internal_Rela *relocs;
6141 Elf_Internal_Rela *lo, *hi, *look;
6142 bfd_vma val;
6143
6144 /* No relocs implies we are linking a --just-symbols object, or looking
6145 at a final linked executable with addr2line or somesuch. */
6146 if (opd_sec->reloc_count == 0)
6147 {
6148 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6149
6150 if (contents == NULL)
6151 {
6152 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6153 return (bfd_vma) -1;
6154 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6155 }
6156
6157 /* PR 17512: file: 64b9dfbb. */
6158 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6159 return (bfd_vma) -1;
6160
6161 val = bfd_get_64 (opd_bfd, contents + offset);
6162 if (code_sec != NULL)
6163 {
6164 asection *sec, *likely = NULL;
6165
6166 if (in_code_sec)
6167 {
6168 sec = *code_sec;
6169 if (sec->vma <= val
6170 && val < sec->vma + sec->size)
6171 likely = sec;
6172 else
6173 val = -1;
6174 }
6175 else
6176 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6177 if (sec->vma <= val
6178 && (sec->flags & SEC_LOAD) != 0
6179 && (sec->flags & SEC_ALLOC) != 0)
6180 likely = sec;
6181 if (likely != NULL)
6182 {
6183 *code_sec = likely;
6184 if (code_off != NULL)
6185 *code_off = val - likely->vma;
6186 }
6187 }
6188 return val;
6189 }
6190
6191 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6192
6193 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6194 if (relocs == NULL)
6195 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6196 /* PR 17512: file: df8e1fd6. */
6197 if (relocs == NULL)
6198 return (bfd_vma) -1;
6199
6200 /* Go find the opd reloc at the sym address. */
6201 lo = relocs;
6202 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6203 val = (bfd_vma) -1;
6204 while (lo < hi)
6205 {
6206 look = lo + (hi - lo) / 2;
6207 if (look->r_offset < offset)
6208 lo = look + 1;
6209 else if (look->r_offset > offset)
6210 hi = look;
6211 else
6212 {
6213 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6214
6215 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6216 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6217 {
6218 unsigned long symndx = ELF64_R_SYM (look->r_info);
6219 asection *sec = NULL;
6220
6221 if (symndx >= symtab_hdr->sh_info
6222 && elf_sym_hashes (opd_bfd) != NULL)
6223 {
6224 struct elf_link_hash_entry **sym_hashes;
6225 struct elf_link_hash_entry *rh;
6226
6227 sym_hashes = elf_sym_hashes (opd_bfd);
6228 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6229 if (rh != NULL)
6230 {
6231 rh = elf_follow_link (rh);
6232 if (rh->root.type != bfd_link_hash_defined
6233 && rh->root.type != bfd_link_hash_defweak)
6234 break;
6235 if (rh->root.u.def.section->owner == opd_bfd)
6236 {
6237 val = rh->root.u.def.value;
6238 sec = rh->root.u.def.section;
6239 }
6240 }
6241 }
6242
6243 if (sec == NULL)
6244 {
6245 Elf_Internal_Sym *sym;
6246
6247 if (symndx < symtab_hdr->sh_info)
6248 {
6249 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6250 if (sym == NULL)
6251 {
6252 size_t symcnt = symtab_hdr->sh_info;
6253 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6254 symcnt, 0,
6255 NULL, NULL, NULL);
6256 if (sym == NULL)
6257 break;
6258 symtab_hdr->contents = (bfd_byte *) sym;
6259 }
6260 sym += symndx;
6261 }
6262 else
6263 {
6264 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6265 1, symndx,
6266 NULL, NULL, NULL);
6267 if (sym == NULL)
6268 break;
6269 }
6270 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6271 if (sec == NULL)
6272 break;
6273 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6274 val = sym->st_value;
6275 }
6276
6277 val += look->r_addend;
6278 if (code_off != NULL)
6279 *code_off = val;
6280 if (code_sec != NULL)
6281 {
6282 if (in_code_sec && *code_sec != sec)
6283 return -1;
6284 else
6285 *code_sec = sec;
6286 }
6287 if (sec->output_section != NULL)
6288 val += sec->output_section->vma + sec->output_offset;
6289 }
6290 break;
6291 }
6292 }
6293
6294 return val;
6295 }
6296
6297 /* If the ELF symbol SYM might be a function in SEC, return the
6298 function size and set *CODE_OFF to the function's entry point,
6299 otherwise return zero. */
6300
6301 static bfd_size_type
6302 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6303 bfd_vma *code_off)
6304 {
6305 bfd_size_type size;
6306
6307 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6308 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6309 return 0;
6310
6311 size = 0;
6312 if (!(sym->flags & BSF_SYNTHETIC))
6313 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6314
6315 if (strcmp (sym->section->name, ".opd") == 0)
6316 {
6317 struct _opd_sec_data *opd = get_opd_info (sym->section);
6318 bfd_vma symval = sym->value;
6319
6320 if (opd != NULL
6321 && opd->adjust != NULL
6322 && elf_section_data (sym->section)->relocs != NULL)
6323 {
6324 /* opd_entry_value will use cached relocs that have been
6325 adjusted, but with raw symbols. That means both local
6326 and global symbols need adjusting. */
6327 long adjust = opd->adjust[OPD_NDX (symval)];
6328 if (adjust == -1)
6329 return 0;
6330 symval += adjust;
6331 }
6332
6333 if (opd_entry_value (sym->section, symval,
6334 &sec, code_off, TRUE) == (bfd_vma) -1)
6335 return 0;
6336 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6337 symbol. This size has nothing to do with the code size of the
6338 function, which is what we're supposed to return, but the
6339 code size isn't available without looking up the dot-sym.
6340 However, doing that would be a waste of time particularly
6341 since elf_find_function will look at the dot-sym anyway.
6342 Now, elf_find_function will keep the largest size of any
6343 function sym found at the code address of interest, so return
6344 1 here to avoid it incorrectly caching a larger function size
6345 for a small function. This does mean we return the wrong
6346 size for a new-ABI function of size 24, but all that does is
6347 disable caching for such functions. */
6348 if (size == 24)
6349 size = 1;
6350 }
6351 else
6352 {
6353 if (sym->section != sec)
6354 return 0;
6355 *code_off = sym->value;
6356 }
6357 if (size == 0)
6358 size = 1;
6359 return size;
6360 }
6361
6362 /* Return true if symbol is a strong function defined in an ELFv2
6363 object with st_other localentry bits of zero, ie. its local entry
6364 point coincides with its global entry point. */
6365
6366 static bfd_boolean
6367 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6368 {
6369 return (h != NULL
6370 && h->type == STT_FUNC
6371 && h->root.type == bfd_link_hash_defined
6372 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6373 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6374 && is_ppc64_elf (h->root.u.def.section->owner)
6375 && abiversion (h->root.u.def.section->owner) >= 2);
6376 }
6377
6378 /* Return true if symbol is defined in a regular object file. */
6379
6380 static bfd_boolean
6381 is_static_defined (struct elf_link_hash_entry *h)
6382 {
6383 return ((h->root.type == bfd_link_hash_defined
6384 || h->root.type == bfd_link_hash_defweak)
6385 && h->root.u.def.section != NULL
6386 && h->root.u.def.section->output_section != NULL);
6387 }
6388
6389 /* If FDH is a function descriptor symbol, return the associated code
6390 entry symbol if it is defined. Return NULL otherwise. */
6391
6392 static struct ppc_link_hash_entry *
6393 defined_code_entry (struct ppc_link_hash_entry *fdh)
6394 {
6395 if (fdh->is_func_descriptor)
6396 {
6397 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6398 if (fh->elf.root.type == bfd_link_hash_defined
6399 || fh->elf.root.type == bfd_link_hash_defweak)
6400 return fh;
6401 }
6402 return NULL;
6403 }
6404
6405 /* If FH is a function code entry symbol, return the associated
6406 function descriptor symbol if it is defined. Return NULL otherwise. */
6407
6408 static struct ppc_link_hash_entry *
6409 defined_func_desc (struct ppc_link_hash_entry *fh)
6410 {
6411 if (fh->oh != NULL
6412 && fh->oh->is_func_descriptor)
6413 {
6414 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6415 if (fdh->elf.root.type == bfd_link_hash_defined
6416 || fdh->elf.root.type == bfd_link_hash_defweak)
6417 return fdh;
6418 }
6419 return NULL;
6420 }
6421
6422 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6423
6424 /* Garbage collect sections, after first dealing with dot-symbols. */
6425
6426 static bfd_boolean
6427 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6428 {
6429 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6430
6431 if (htab != NULL && htab->need_func_desc_adj)
6432 {
6433 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6434 htab->need_func_desc_adj = 0;
6435 }
6436 return bfd_elf_gc_sections (abfd, info);
6437 }
6438
6439 /* Mark all our entry sym sections, both opd and code section. */
6440
6441 static void
6442 ppc64_elf_gc_keep (struct bfd_link_info *info)
6443 {
6444 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6445 struct bfd_sym_chain *sym;
6446
6447 if (htab == NULL)
6448 return;
6449
6450 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6451 {
6452 struct ppc_link_hash_entry *eh, *fh;
6453 asection *sec;
6454
6455 eh = (struct ppc_link_hash_entry *)
6456 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6457 if (eh == NULL)
6458 continue;
6459 if (eh->elf.root.type != bfd_link_hash_defined
6460 && eh->elf.root.type != bfd_link_hash_defweak)
6461 continue;
6462
6463 fh = defined_code_entry (eh);
6464 if (fh != NULL)
6465 {
6466 sec = fh->elf.root.u.def.section;
6467 sec->flags |= SEC_KEEP;
6468 }
6469 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6470 && opd_entry_value (eh->elf.root.u.def.section,
6471 eh->elf.root.u.def.value,
6472 &sec, NULL, FALSE) != (bfd_vma) -1)
6473 sec->flags |= SEC_KEEP;
6474
6475 sec = eh->elf.root.u.def.section;
6476 sec->flags |= SEC_KEEP;
6477 }
6478 }
6479
6480 /* Mark sections containing dynamically referenced symbols. When
6481 building shared libraries, we must assume that any visible symbol is
6482 referenced. */
6483
6484 static bfd_boolean
6485 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6486 {
6487 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6488 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6489 struct ppc_link_hash_entry *fdh;
6490 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6491
6492 /* Dynamic linking info is on the func descriptor sym. */
6493 fdh = defined_func_desc (eh);
6494 if (fdh != NULL)
6495 eh = fdh;
6496
6497 if ((eh->elf.root.type == bfd_link_hash_defined
6498 || eh->elf.root.type == bfd_link_hash_defweak)
6499 && (eh->elf.ref_dynamic
6500 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6501 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6502 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6503 && (!bfd_link_executable (info)
6504 || info->gc_keep_exported
6505 || info->export_dynamic
6506 || (eh->elf.dynamic
6507 && d != NULL
6508 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6509 && (eh->elf.versioned >= versioned
6510 || !bfd_hide_sym_by_version (info->version_info,
6511 eh->elf.root.root.string)))))
6512 {
6513 asection *code_sec;
6514 struct ppc_link_hash_entry *fh;
6515
6516 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6517
6518 /* Function descriptor syms cause the associated
6519 function code sym section to be marked. */
6520 fh = defined_code_entry (eh);
6521 if (fh != NULL)
6522 {
6523 code_sec = fh->elf.root.u.def.section;
6524 code_sec->flags |= SEC_KEEP;
6525 }
6526 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6527 && opd_entry_value (eh->elf.root.u.def.section,
6528 eh->elf.root.u.def.value,
6529 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6530 code_sec->flags |= SEC_KEEP;
6531 }
6532
6533 return TRUE;
6534 }
6535
6536 /* Return the section that should be marked against GC for a given
6537 relocation. */
6538
6539 static asection *
6540 ppc64_elf_gc_mark_hook (asection *sec,
6541 struct bfd_link_info *info,
6542 Elf_Internal_Rela *rel,
6543 struct elf_link_hash_entry *h,
6544 Elf_Internal_Sym *sym)
6545 {
6546 asection *rsec;
6547
6548 /* Syms return NULL if we're marking .opd, so we avoid marking all
6549 function sections, as all functions are referenced in .opd. */
6550 rsec = NULL;
6551 if (get_opd_info (sec) != NULL)
6552 return rsec;
6553
6554 if (h != NULL)
6555 {
6556 enum elf_ppc64_reloc_type r_type;
6557 struct ppc_link_hash_entry *eh, *fh, *fdh;
6558
6559 r_type = ELF64_R_TYPE (rel->r_info);
6560 switch (r_type)
6561 {
6562 case R_PPC64_GNU_VTINHERIT:
6563 case R_PPC64_GNU_VTENTRY:
6564 break;
6565
6566 default:
6567 switch (h->root.type)
6568 {
6569 case bfd_link_hash_defined:
6570 case bfd_link_hash_defweak:
6571 eh = (struct ppc_link_hash_entry *) h;
6572 fdh = defined_func_desc (eh);
6573 if (fdh != NULL)
6574 {
6575 /* -mcall-aixdesc code references the dot-symbol on
6576 a call reloc. Mark the function descriptor too
6577 against garbage collection. */
6578 fdh->elf.mark = 1;
6579 if (fdh->elf.u.weakdef != NULL)
6580 fdh->elf.u.weakdef->mark = 1;
6581 eh = fdh;
6582 }
6583
6584 /* Function descriptor syms cause the associated
6585 function code sym section to be marked. */
6586 fh = defined_code_entry (eh);
6587 if (fh != NULL)
6588 {
6589 /* They also mark their opd section. */
6590 eh->elf.root.u.def.section->gc_mark = 1;
6591
6592 rsec = fh->elf.root.u.def.section;
6593 }
6594 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6595 && opd_entry_value (eh->elf.root.u.def.section,
6596 eh->elf.root.u.def.value,
6597 &rsec, NULL, FALSE) != (bfd_vma) -1)
6598 eh->elf.root.u.def.section->gc_mark = 1;
6599 else
6600 rsec = h->root.u.def.section;
6601 break;
6602
6603 case bfd_link_hash_common:
6604 rsec = h->root.u.c.p->section;
6605 break;
6606
6607 default:
6608 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6609 }
6610 }
6611 }
6612 else
6613 {
6614 struct _opd_sec_data *opd;
6615
6616 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6617 opd = get_opd_info (rsec);
6618 if (opd != NULL && opd->func_sec != NULL)
6619 {
6620 rsec->gc_mark = 1;
6621
6622 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6623 }
6624 }
6625
6626 return rsec;
6627 }
6628
6629 /* Update the .got, .plt. and dynamic reloc reference counts for the
6630 section being removed. */
6631
6632 static bfd_boolean
6633 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6634 asection *sec, const Elf_Internal_Rela *relocs)
6635 {
6636 struct ppc_link_hash_table *htab;
6637 Elf_Internal_Shdr *symtab_hdr;
6638 struct elf_link_hash_entry **sym_hashes;
6639 struct got_entry **local_got_ents;
6640 const Elf_Internal_Rela *rel, *relend;
6641
6642 if (bfd_link_relocatable (info))
6643 return TRUE;
6644
6645 if ((sec->flags & SEC_ALLOC) == 0)
6646 return TRUE;
6647
6648 elf_section_data (sec)->local_dynrel = NULL;
6649
6650 htab = ppc_hash_table (info);
6651 if (htab == NULL)
6652 return FALSE;
6653
6654 symtab_hdr = &elf_symtab_hdr (abfd);
6655 sym_hashes = elf_sym_hashes (abfd);
6656 local_got_ents = elf_local_got_ents (abfd);
6657
6658 relend = relocs + sec->reloc_count;
6659 for (rel = relocs; rel < relend; rel++)
6660 {
6661 unsigned long r_symndx;
6662 enum elf_ppc64_reloc_type r_type;
6663 struct elf_link_hash_entry *h = NULL;
6664 struct plt_entry **plt_list = NULL;
6665 unsigned char tls_type = 0;
6666
6667 r_symndx = ELF64_R_SYM (rel->r_info);
6668 r_type = ELF64_R_TYPE (rel->r_info);
6669 if (r_symndx >= symtab_hdr->sh_info)
6670 {
6671 struct ppc_link_hash_entry *eh;
6672 struct elf_dyn_relocs **pp;
6673 struct elf_dyn_relocs *p;
6674
6675 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6676 h = elf_follow_link (h);
6677 eh = (struct ppc_link_hash_entry *) h;
6678
6679 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6680 if (p->sec == sec)
6681 {
6682 /* Everything must go for SEC. */
6683 *pp = p->next;
6684 break;
6685 }
6686 }
6687
6688 switch (r_type)
6689 {
6690 case R_PPC64_GOT_TLSLD16:
6691 case R_PPC64_GOT_TLSLD16_LO:
6692 case R_PPC64_GOT_TLSLD16_HI:
6693 case R_PPC64_GOT_TLSLD16_HA:
6694 tls_type = TLS_TLS | TLS_LD;
6695 goto dogot;
6696
6697 case R_PPC64_GOT_TLSGD16:
6698 case R_PPC64_GOT_TLSGD16_LO:
6699 case R_PPC64_GOT_TLSGD16_HI:
6700 case R_PPC64_GOT_TLSGD16_HA:
6701 tls_type = TLS_TLS | TLS_GD;
6702 goto dogot;
6703
6704 case R_PPC64_GOT_TPREL16_DS:
6705 case R_PPC64_GOT_TPREL16_LO_DS:
6706 case R_PPC64_GOT_TPREL16_HI:
6707 case R_PPC64_GOT_TPREL16_HA:
6708 tls_type = TLS_TLS | TLS_TPREL;
6709 goto dogot;
6710
6711 case R_PPC64_GOT_DTPREL16_DS:
6712 case R_PPC64_GOT_DTPREL16_LO_DS:
6713 case R_PPC64_GOT_DTPREL16_HI:
6714 case R_PPC64_GOT_DTPREL16_HA:
6715 tls_type = TLS_TLS | TLS_DTPREL;
6716 goto dogot;
6717
6718 case R_PPC64_GOT16:
6719 case R_PPC64_GOT16_DS:
6720 case R_PPC64_GOT16_HA:
6721 case R_PPC64_GOT16_HI:
6722 case R_PPC64_GOT16_LO:
6723 case R_PPC64_GOT16_LO_DS:
6724 dogot:
6725 {
6726 struct got_entry *ent;
6727
6728 if (h != NULL)
6729 ent = h->got.glist;
6730 else
6731 ent = local_got_ents[r_symndx];
6732
6733 for (; ent != NULL; ent = ent->next)
6734 if (ent->addend == rel->r_addend
6735 && ent->owner == abfd
6736 && ent->tls_type == tls_type)
6737 break;
6738 if (ent == NULL)
6739 abort ();
6740 if (ent->got.refcount > 0)
6741 ent->got.refcount -= 1;
6742 }
6743 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6744 plt_list = &h->plt.plist;
6745 break;
6746
6747 case R_PPC64_PLT16_HA:
6748 case R_PPC64_PLT16_HI:
6749 case R_PPC64_PLT16_LO:
6750 case R_PPC64_PLT32:
6751 case R_PPC64_PLT64:
6752 case R_PPC64_REL14:
6753 case R_PPC64_REL14_BRNTAKEN:
6754 case R_PPC64_REL14_BRTAKEN:
6755 case R_PPC64_REL24:
6756 if (h != NULL)
6757 plt_list = &h->plt.plist;
6758 else if (local_got_ents != NULL)
6759 {
6760 struct plt_entry **local_plt = (struct plt_entry **)
6761 (local_got_ents + symtab_hdr->sh_info);
6762 unsigned char *local_got_tls_masks = (unsigned char *)
6763 (local_plt + symtab_hdr->sh_info);
6764 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6765 plt_list = local_plt + r_symndx;
6766 }
6767 break;
6768
6769 case R_PPC64_ADDR64:
6770 case R_PPC64_ADDR16:
6771 case R_PPC64_ADDR16_DS:
6772 case R_PPC64_ADDR16_HA:
6773 case R_PPC64_ADDR16_HI:
6774 case R_PPC64_ADDR16_HIGH:
6775 case R_PPC64_ADDR16_HIGHA:
6776 case R_PPC64_ADDR16_HIGHER:
6777 case R_PPC64_ADDR16_HIGHERA:
6778 case R_PPC64_ADDR16_HIGHEST:
6779 case R_PPC64_ADDR16_HIGHESTA:
6780 case R_PPC64_ADDR16_LO:
6781 case R_PPC64_ADDR16_LO_DS:
6782 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6783 && rel->r_addend == 0)
6784 plt_list = &h->plt.plist;
6785 break;
6786
6787 default:
6788 break;
6789 }
6790 if (plt_list != NULL)
6791 {
6792 struct plt_entry *ent;
6793
6794 for (ent = *plt_list; ent != NULL; ent = ent->next)
6795 if (ent->addend == rel->r_addend)
6796 break;
6797 if (ent != NULL && ent->plt.refcount > 0)
6798 ent->plt.refcount -= 1;
6799 }
6800 }
6801 return TRUE;
6802 }
6803
6804 /* The maximum size of .sfpr. */
6805 #define SFPR_MAX (218*4)
6806
6807 struct sfpr_def_parms
6808 {
6809 const char name[12];
6810 unsigned char lo, hi;
6811 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6812 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6813 };
6814
6815 /* Auto-generate _save*, _rest* functions in .sfpr.
6816 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6817 instead. */
6818
6819 static bfd_boolean
6820 sfpr_define (struct bfd_link_info *info,
6821 const struct sfpr_def_parms *parm,
6822 asection *stub_sec)
6823 {
6824 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6825 unsigned int i;
6826 size_t len = strlen (parm->name);
6827 bfd_boolean writing = FALSE;
6828 char sym[16];
6829
6830 if (htab == NULL)
6831 return FALSE;
6832
6833 memcpy (sym, parm->name, len);
6834 sym[len + 2] = 0;
6835
6836 for (i = parm->lo; i <= parm->hi; i++)
6837 {
6838 struct ppc_link_hash_entry *h;
6839
6840 sym[len + 0] = i / 10 + '0';
6841 sym[len + 1] = i % 10 + '0';
6842 h = (struct ppc_link_hash_entry *)
6843 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6844 if (stub_sec != NULL)
6845 {
6846 if (h != NULL
6847 && h->elf.root.type == bfd_link_hash_defined
6848 && h->elf.root.u.def.section == htab->sfpr)
6849 {
6850 struct elf_link_hash_entry *s;
6851 char buf[32];
6852 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6853 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6854 if (s == NULL)
6855 return FALSE;
6856 if (s->root.type == bfd_link_hash_new
6857 || (s->root.type = bfd_link_hash_defined
6858 && s->root.u.def.section == stub_sec))
6859 {
6860 s->root.type = bfd_link_hash_defined;
6861 s->root.u.def.section = stub_sec;
6862 s->root.u.def.value = (stub_sec->size
6863 + h->elf.root.u.def.value);
6864 s->ref_regular = 1;
6865 s->def_regular = 1;
6866 s->ref_regular_nonweak = 1;
6867 s->forced_local = 1;
6868 s->non_elf = 0;
6869 s->root.linker_def = 1;
6870 }
6871 }
6872 continue;
6873 }
6874 if (h != NULL)
6875 {
6876 h->save_res = 1;
6877 if (!h->elf.def_regular)
6878 {
6879 h->elf.root.type = bfd_link_hash_defined;
6880 h->elf.root.u.def.section = htab->sfpr;
6881 h->elf.root.u.def.value = htab->sfpr->size;
6882 h->elf.type = STT_FUNC;
6883 h->elf.def_regular = 1;
6884 h->elf.non_elf = 0;
6885 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6886 writing = TRUE;
6887 if (htab->sfpr->contents == NULL)
6888 {
6889 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6890 if (htab->sfpr->contents == NULL)
6891 return FALSE;
6892 }
6893 }
6894 }
6895 if (writing)
6896 {
6897 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6898 if (i != parm->hi)
6899 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6900 else
6901 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6902 htab->sfpr->size = p - htab->sfpr->contents;
6903 }
6904 }
6905
6906 return TRUE;
6907 }
6908
6909 static bfd_byte *
6910 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6911 {
6912 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6913 return p + 4;
6914 }
6915
6916 static bfd_byte *
6917 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6918 {
6919 p = savegpr0 (abfd, p, r);
6920 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6921 p = p + 4;
6922 bfd_put_32 (abfd, BLR, p);
6923 return p + 4;
6924 }
6925
6926 static bfd_byte *
6927 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6928 {
6929 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6930 return p + 4;
6931 }
6932
6933 static bfd_byte *
6934 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6935 {
6936 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6937 p = p + 4;
6938 p = restgpr0 (abfd, p, r);
6939 bfd_put_32 (abfd, MTLR_R0, p);
6940 p = p + 4;
6941 if (r == 29)
6942 {
6943 p = restgpr0 (abfd, p, 30);
6944 p = restgpr0 (abfd, p, 31);
6945 }
6946 bfd_put_32 (abfd, BLR, p);
6947 return p + 4;
6948 }
6949
6950 static bfd_byte *
6951 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6952 {
6953 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6954 return p + 4;
6955 }
6956
6957 static bfd_byte *
6958 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6959 {
6960 p = savegpr1 (abfd, p, r);
6961 bfd_put_32 (abfd, BLR, p);
6962 return p + 4;
6963 }
6964
6965 static bfd_byte *
6966 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6967 {
6968 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6969 return p + 4;
6970 }
6971
6972 static bfd_byte *
6973 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6974 {
6975 p = restgpr1 (abfd, p, r);
6976 bfd_put_32 (abfd, BLR, p);
6977 return p + 4;
6978 }
6979
6980 static bfd_byte *
6981 savefpr (bfd *abfd, bfd_byte *p, int r)
6982 {
6983 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6984 return p + 4;
6985 }
6986
6987 static bfd_byte *
6988 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6989 {
6990 p = savefpr (abfd, p, r);
6991 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6992 p = p + 4;
6993 bfd_put_32 (abfd, BLR, p);
6994 return p + 4;
6995 }
6996
6997 static bfd_byte *
6998 restfpr (bfd *abfd, bfd_byte *p, int r)
6999 {
7000 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
7001 return p + 4;
7002 }
7003
7004 static bfd_byte *
7005 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
7006 {
7007 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
7008 p = p + 4;
7009 p = restfpr (abfd, p, r);
7010 bfd_put_32 (abfd, MTLR_R0, p);
7011 p = p + 4;
7012 if (r == 29)
7013 {
7014 p = restfpr (abfd, p, 30);
7015 p = restfpr (abfd, p, 31);
7016 }
7017 bfd_put_32 (abfd, BLR, p);
7018 return p + 4;
7019 }
7020
7021 static bfd_byte *
7022 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
7023 {
7024 p = savefpr (abfd, p, r);
7025 bfd_put_32 (abfd, BLR, p);
7026 return p + 4;
7027 }
7028
7029 static bfd_byte *
7030 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
7031 {
7032 p = restfpr (abfd, p, r);
7033 bfd_put_32 (abfd, BLR, p);
7034 return p + 4;
7035 }
7036
7037 static bfd_byte *
7038 savevr (bfd *abfd, bfd_byte *p, int r)
7039 {
7040 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7041 p = p + 4;
7042 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
7043 return p + 4;
7044 }
7045
7046 static bfd_byte *
7047 savevr_tail (bfd *abfd, bfd_byte *p, int r)
7048 {
7049 p = savevr (abfd, p, r);
7050 bfd_put_32 (abfd, BLR, p);
7051 return p + 4;
7052 }
7053
7054 static bfd_byte *
7055 restvr (bfd *abfd, bfd_byte *p, int r)
7056 {
7057 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7058 p = p + 4;
7059 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7060 return p + 4;
7061 }
7062
7063 static bfd_byte *
7064 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7065 {
7066 p = restvr (abfd, p, r);
7067 bfd_put_32 (abfd, BLR, p);
7068 return p + 4;
7069 }
7070
7071 /* Called via elf_link_hash_traverse to transfer dynamic linking
7072 information on function code symbol entries to their corresponding
7073 function descriptor symbol entries. */
7074
7075 static bfd_boolean
7076 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7077 {
7078 struct bfd_link_info *info;
7079 struct ppc_link_hash_table *htab;
7080 struct ppc_link_hash_entry *fh;
7081 struct ppc_link_hash_entry *fdh;
7082 bfd_boolean force_local;
7083
7084 fh = (struct ppc_link_hash_entry *) h;
7085 if (fh->elf.root.type == bfd_link_hash_indirect)
7086 return TRUE;
7087
7088 if (!fh->is_func)
7089 return TRUE;
7090
7091 if (fh->elf.root.root.string[0] != '.'
7092 || fh->elf.root.root.string[1] == '\0')
7093 return TRUE;
7094
7095 info = inf;
7096 htab = ppc_hash_table (info);
7097 if (htab == NULL)
7098 return FALSE;
7099
7100 /* Find the corresponding function descriptor symbol. */
7101 fdh = lookup_fdh (fh, htab);
7102
7103 /* Resolve undefined references to dot-symbols as the value
7104 in the function descriptor, if we have one in a regular object.
7105 This is to satisfy cases like ".quad .foo". Calls to functions
7106 in dynamic objects are handled elsewhere. */
7107 if ((fh->elf.root.type == bfd_link_hash_undefined
7108 || fh->elf.root.type == bfd_link_hash_undefweak)
7109 && (fdh->elf.root.type == bfd_link_hash_defined
7110 || fdh->elf.root.type == bfd_link_hash_defweak)
7111 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7112 && opd_entry_value (fdh->elf.root.u.def.section,
7113 fdh->elf.root.u.def.value,
7114 &fh->elf.root.u.def.section,
7115 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7116 {
7117 fh->elf.root.type = fdh->elf.root.type;
7118 fh->elf.forced_local = 1;
7119 fh->elf.def_regular = fdh->elf.def_regular;
7120 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7121 }
7122
7123 if (!fh->elf.dynamic)
7124 {
7125 struct plt_entry *ent;
7126
7127 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7128 if (ent->plt.refcount > 0)
7129 break;
7130 if (ent == NULL)
7131 return TRUE;
7132 }
7133
7134 /* Create a descriptor as undefined if necessary. */
7135 if (fdh == NULL
7136 && !bfd_link_executable (info)
7137 && (fh->elf.root.type == bfd_link_hash_undefined
7138 || fh->elf.root.type == bfd_link_hash_undefweak))
7139 {
7140 fdh = make_fdh (info, fh);
7141 if (fdh == NULL)
7142 return FALSE;
7143 }
7144
7145 /* We can't support overriding of symbols on a fake descriptor. */
7146 if (fdh != NULL
7147 && fdh->fake
7148 && (fh->elf.root.type == bfd_link_hash_defined
7149 || fh->elf.root.type == bfd_link_hash_defweak))
7150 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7151
7152 /* Transfer dynamic linking information to the function descriptor. */
7153 if (fdh != NULL)
7154 {
7155 fdh->elf.ref_regular |= fh->elf.ref_regular;
7156 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7157 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7158 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7159 fdh->elf.dynamic |= fh->elf.dynamic;
7160 fdh->elf.needs_plt |= (fh->elf.needs_plt
7161 || fh->elf.type == STT_FUNC
7162 || fh->elf.type == STT_GNU_IFUNC);
7163 move_plt_plist (fh, fdh);
7164
7165 if (!fdh->elf.forced_local
7166 && fh->elf.dynindx != -1)
7167 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7168 return FALSE;
7169 }
7170
7171 /* Now that the info is on the function descriptor, clear the
7172 function code sym info. Any function code syms for which we
7173 don't have a definition in a regular file, we force local.
7174 This prevents a shared library from exporting syms that have
7175 been imported from another library. Function code syms that
7176 are really in the library we must leave global to prevent the
7177 linker dragging in a definition from a static library. */
7178 force_local = (!fh->elf.def_regular
7179 || fdh == NULL
7180 || !fdh->elf.def_regular
7181 || fdh->elf.forced_local);
7182 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7183
7184 return TRUE;
7185 }
7186
7187 static const struct sfpr_def_parms save_res_funcs[] =
7188 {
7189 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7190 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7191 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7192 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7193 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7194 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7195 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7196 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7197 { "._savef", 14, 31, savefpr, savefpr1_tail },
7198 { "._restf", 14, 31, restfpr, restfpr1_tail },
7199 { "_savevr_", 20, 31, savevr, savevr_tail },
7200 { "_restvr_", 20, 31, restvr, restvr_tail }
7201 };
7202
7203 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7204 this hook to a) provide some gcc support functions, and b) transfer
7205 dynamic linking information gathered so far on function code symbol
7206 entries, to their corresponding function descriptor symbol entries. */
7207
7208 static bfd_boolean
7209 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7210 struct bfd_link_info *info)
7211 {
7212 struct ppc_link_hash_table *htab;
7213
7214 htab = ppc_hash_table (info);
7215 if (htab == NULL)
7216 return FALSE;
7217
7218 /* Provide any missing _save* and _rest* functions. */
7219 if (htab->sfpr != NULL)
7220 {
7221 unsigned int i;
7222
7223 htab->sfpr->size = 0;
7224 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7225 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7226 return FALSE;
7227 if (htab->sfpr->size == 0)
7228 htab->sfpr->flags |= SEC_EXCLUDE;
7229 }
7230
7231 if (bfd_link_relocatable (info))
7232 return TRUE;
7233
7234 if (htab->elf.hgot != NULL)
7235 {
7236 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7237 /* Make .TOC. defined so as to prevent it being made dynamic.
7238 The wrong value here is fixed later in ppc64_elf_set_toc. */
7239 if (!htab->elf.hgot->def_regular
7240 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7241 {
7242 htab->elf.hgot->root.type = bfd_link_hash_defined;
7243 htab->elf.hgot->root.u.def.value = 0;
7244 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7245 htab->elf.hgot->def_regular = 1;
7246 htab->elf.hgot->root.linker_def = 1;
7247 }
7248 htab->elf.hgot->type = STT_OBJECT;
7249 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7250 | STV_HIDDEN);
7251 }
7252
7253 if (htab->need_func_desc_adj)
7254 {
7255 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7256 htab->need_func_desc_adj = 0;
7257 }
7258
7259 return TRUE;
7260 }
7261
7262 /* Return true if we have dynamic relocs against H that apply to
7263 read-only sections. */
7264
7265 static bfd_boolean
7266 readonly_dynrelocs (struct elf_link_hash_entry *h)
7267 {
7268 struct ppc_link_hash_entry *eh;
7269 struct elf_dyn_relocs *p;
7270
7271 eh = (struct ppc_link_hash_entry *) h;
7272 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7273 {
7274 asection *s = p->sec->output_section;
7275
7276 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7277 return TRUE;
7278 }
7279 return FALSE;
7280 }
7281
7282 /* Return true if we have dynamic relocs against H or any of its weak
7283 aliases, that apply to read-only sections. */
7284
7285 static bfd_boolean
7286 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7287 {
7288 struct ppc_link_hash_entry *eh;
7289
7290 eh = (struct ppc_link_hash_entry *) h;
7291 do
7292 {
7293 if (readonly_dynrelocs (&eh->elf))
7294 return TRUE;
7295 eh = eh->weakref;
7296 } while (eh != NULL && &eh->elf != h);
7297
7298 return FALSE;
7299 }
7300
7301 /* Return whether EH has pc-relative dynamic relocs. */
7302
7303 static bfd_boolean
7304 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7305 {
7306 struct elf_dyn_relocs *p;
7307
7308 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7309 if (p->pc_count != 0)
7310 return TRUE;
7311 return FALSE;
7312 }
7313
7314 /* Return true if a global entry stub will be created for H. Valid
7315 for ELFv2 before plt entries have been allocated. */
7316
7317 static bfd_boolean
7318 global_entry_stub (struct elf_link_hash_entry *h)
7319 {
7320 struct plt_entry *pent;
7321
7322 if (!h->pointer_equality_needed
7323 || h->def_regular)
7324 return FALSE;
7325
7326 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7327 if (pent->plt.refcount > 0
7328 && pent->addend == 0)
7329 return TRUE;
7330
7331 return FALSE;
7332 }
7333
7334 /* Adjust a symbol defined by a dynamic object and referenced by a
7335 regular object. The current definition is in some section of the
7336 dynamic object, but we're not including those sections. We have to
7337 change the definition to something the rest of the link can
7338 understand. */
7339
7340 static bfd_boolean
7341 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7342 struct elf_link_hash_entry *h)
7343 {
7344 struct ppc_link_hash_table *htab;
7345 asection *s, *srel;
7346
7347 htab = ppc_hash_table (info);
7348 if (htab == NULL)
7349 return FALSE;
7350
7351 /* Deal with function syms. */
7352 if (h->type == STT_FUNC
7353 || h->type == STT_GNU_IFUNC
7354 || h->needs_plt)
7355 {
7356 /* Clear procedure linkage table information for any symbol that
7357 won't need a .plt entry. */
7358 struct plt_entry *ent;
7359 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7360 if (ent->plt.refcount > 0)
7361 break;
7362 if (ent == NULL
7363 || (h->type != STT_GNU_IFUNC
7364 && (SYMBOL_CALLS_LOCAL (info, h)
7365 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7366 || ((struct ppc_link_hash_entry *) h)->save_res)
7367 {
7368 h->plt.plist = NULL;
7369 h->needs_plt = 0;
7370 h->pointer_equality_needed = 0;
7371 }
7372 else if (abiversion (info->output_bfd) >= 2)
7373 {
7374 /* Taking a function's address in a read/write section
7375 doesn't require us to define the function symbol in the
7376 executable on a global entry stub. A dynamic reloc can
7377 be used instead. The reason we prefer a few more dynamic
7378 relocs is that calling via a global entry stub costs a
7379 few more instructions, and pointer_equality_needed causes
7380 extra work in ld.so when resolving these symbols. */
7381 if (global_entry_stub (h)
7382 && !alias_readonly_dynrelocs (h))
7383 {
7384 h->pointer_equality_needed = 0;
7385 /* After adjust_dynamic_symbol, non_got_ref set in
7386 the non-pic case means that dyn_relocs for this
7387 symbol should be discarded. */
7388 h->non_got_ref = 0;
7389 }
7390
7391 /* If making a plt entry, then we don't need copy relocs. */
7392 return TRUE;
7393 }
7394 }
7395 else
7396 h->plt.plist = NULL;
7397
7398 /* If this is a weak symbol, and there is a real definition, the
7399 processor independent code will have arranged for us to see the
7400 real definition first, and we can just use the same value. */
7401 if (h->u.weakdef != NULL)
7402 {
7403 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7404 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7405 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7406 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7407 if (ELIMINATE_COPY_RELOCS)
7408 h->non_got_ref = h->u.weakdef->non_got_ref;
7409 return TRUE;
7410 }
7411
7412 /* If we are creating a shared library, we must presume that the
7413 only references to the symbol are via the global offset table.
7414 For such cases we need not do anything here; the relocations will
7415 be handled correctly by relocate_section. */
7416 if (bfd_link_pic (info))
7417 return TRUE;
7418
7419 /* If there are no references to this symbol that do not use the
7420 GOT, we don't need to generate a copy reloc. */
7421 if (!h->non_got_ref)
7422 return TRUE;
7423
7424 /* Don't generate a copy reloc for symbols defined in the executable. */
7425 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7426
7427 /* If -z nocopyreloc was given, don't generate them either. */
7428 || info->nocopyreloc
7429
7430 /* If we didn't find any dynamic relocs in read-only sections, then
7431 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7432 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7433
7434 /* Protected variables do not work with .dynbss. The copy in
7435 .dynbss won't be used by the shared library with the protected
7436 definition for the variable. Text relocations are preferable
7437 to an incorrect program. */
7438 || h->protected_def)
7439 {
7440 h->non_got_ref = 0;
7441 return TRUE;
7442 }
7443
7444 if (h->plt.plist != NULL)
7445 {
7446 /* We should never get here, but unfortunately there are versions
7447 of gcc out there that improperly (for this ABI) put initialized
7448 function pointers, vtable refs and suchlike in read-only
7449 sections. Allow them to proceed, but warn that this might
7450 break at runtime. */
7451 info->callbacks->einfo
7452 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7453 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7454 h->root.root.string);
7455 }
7456
7457 /* This is a reference to a symbol defined by a dynamic object which
7458 is not a function. */
7459
7460 /* We must allocate the symbol in our .dynbss section, which will
7461 become part of the .bss section of the executable. There will be
7462 an entry for this symbol in the .dynsym section. The dynamic
7463 object will contain position independent code, so all references
7464 from the dynamic object to this symbol will go through the global
7465 offset table. The dynamic linker will use the .dynsym entry to
7466 determine the address it must put in the global offset table, so
7467 both the dynamic object and the regular object will refer to the
7468 same memory location for the variable. */
7469
7470 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7471 to copy the initial value out of the dynamic object and into the
7472 runtime process image. We need to remember the offset into the
7473 .rela.bss section we are going to use. */
7474 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7475 {
7476 s = htab->elf.sdynrelro;
7477 srel = htab->elf.sreldynrelro;
7478 }
7479 else
7480 {
7481 s = htab->elf.sdynbss;
7482 srel = htab->elf.srelbss;
7483 }
7484 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7485 {
7486 srel->size += sizeof (Elf64_External_Rela);
7487 h->needs_copy = 1;
7488 }
7489
7490 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7491 }
7492
7493 /* If given a function descriptor symbol, hide both the function code
7494 sym and the descriptor. */
7495 static void
7496 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7497 struct elf_link_hash_entry *h,
7498 bfd_boolean force_local)
7499 {
7500 struct ppc_link_hash_entry *eh;
7501 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7502
7503 eh = (struct ppc_link_hash_entry *) h;
7504 if (eh->is_func_descriptor)
7505 {
7506 struct ppc_link_hash_entry *fh = eh->oh;
7507
7508 if (fh == NULL)
7509 {
7510 const char *p, *q;
7511 struct elf_link_hash_table *htab = elf_hash_table (info);
7512 char save;
7513
7514 /* We aren't supposed to use alloca in BFD because on
7515 systems which do not have alloca the version in libiberty
7516 calls xmalloc, which might cause the program to crash
7517 when it runs out of memory. This function doesn't have a
7518 return status, so there's no way to gracefully return an
7519 error. So cheat. We know that string[-1] can be safely
7520 accessed; It's either a string in an ELF string table,
7521 or allocated in an objalloc structure. */
7522
7523 p = eh->elf.root.root.string - 1;
7524 save = *p;
7525 *(char *) p = '.';
7526 fh = (struct ppc_link_hash_entry *)
7527 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7528 *(char *) p = save;
7529
7530 /* Unfortunately, if it so happens that the string we were
7531 looking for was allocated immediately before this string,
7532 then we overwrote the string terminator. That's the only
7533 reason the lookup should fail. */
7534 if (fh == NULL)
7535 {
7536 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7537 while (q >= eh->elf.root.root.string && *q == *p)
7538 --q, --p;
7539 if (q < eh->elf.root.root.string && *p == '.')
7540 fh = (struct ppc_link_hash_entry *)
7541 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7542 }
7543 if (fh != NULL)
7544 {
7545 eh->oh = fh;
7546 fh->oh = eh;
7547 }
7548 }
7549 if (fh != NULL)
7550 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7551 }
7552 }
7553
7554 static bfd_boolean
7555 get_sym_h (struct elf_link_hash_entry **hp,
7556 Elf_Internal_Sym **symp,
7557 asection **symsecp,
7558 unsigned char **tls_maskp,
7559 Elf_Internal_Sym **locsymsp,
7560 unsigned long r_symndx,
7561 bfd *ibfd)
7562 {
7563 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7564
7565 if (r_symndx >= symtab_hdr->sh_info)
7566 {
7567 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7568 struct elf_link_hash_entry *h;
7569
7570 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7571 h = elf_follow_link (h);
7572
7573 if (hp != NULL)
7574 *hp = h;
7575
7576 if (symp != NULL)
7577 *symp = NULL;
7578
7579 if (symsecp != NULL)
7580 {
7581 asection *symsec = NULL;
7582 if (h->root.type == bfd_link_hash_defined
7583 || h->root.type == bfd_link_hash_defweak)
7584 symsec = h->root.u.def.section;
7585 *symsecp = symsec;
7586 }
7587
7588 if (tls_maskp != NULL)
7589 {
7590 struct ppc_link_hash_entry *eh;
7591
7592 eh = (struct ppc_link_hash_entry *) h;
7593 *tls_maskp = &eh->tls_mask;
7594 }
7595 }
7596 else
7597 {
7598 Elf_Internal_Sym *sym;
7599 Elf_Internal_Sym *locsyms = *locsymsp;
7600
7601 if (locsyms == NULL)
7602 {
7603 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7604 if (locsyms == NULL)
7605 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7606 symtab_hdr->sh_info,
7607 0, NULL, NULL, NULL);
7608 if (locsyms == NULL)
7609 return FALSE;
7610 *locsymsp = locsyms;
7611 }
7612 sym = locsyms + r_symndx;
7613
7614 if (hp != NULL)
7615 *hp = NULL;
7616
7617 if (symp != NULL)
7618 *symp = sym;
7619
7620 if (symsecp != NULL)
7621 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7622
7623 if (tls_maskp != NULL)
7624 {
7625 struct got_entry **lgot_ents;
7626 unsigned char *tls_mask;
7627
7628 tls_mask = NULL;
7629 lgot_ents = elf_local_got_ents (ibfd);
7630 if (lgot_ents != NULL)
7631 {
7632 struct plt_entry **local_plt = (struct plt_entry **)
7633 (lgot_ents + symtab_hdr->sh_info);
7634 unsigned char *lgot_masks = (unsigned char *)
7635 (local_plt + symtab_hdr->sh_info);
7636 tls_mask = &lgot_masks[r_symndx];
7637 }
7638 *tls_maskp = tls_mask;
7639 }
7640 }
7641 return TRUE;
7642 }
7643
7644 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7645 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7646 type suitable for optimization, and 1 otherwise. */
7647
7648 static int
7649 get_tls_mask (unsigned char **tls_maskp,
7650 unsigned long *toc_symndx,
7651 bfd_vma *toc_addend,
7652 Elf_Internal_Sym **locsymsp,
7653 const Elf_Internal_Rela *rel,
7654 bfd *ibfd)
7655 {
7656 unsigned long r_symndx;
7657 int next_r;
7658 struct elf_link_hash_entry *h;
7659 Elf_Internal_Sym *sym;
7660 asection *sec;
7661 bfd_vma off;
7662
7663 r_symndx = ELF64_R_SYM (rel->r_info);
7664 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7665 return 0;
7666
7667 if ((*tls_maskp != NULL && **tls_maskp != 0)
7668 || sec == NULL
7669 || ppc64_elf_section_data (sec) == NULL
7670 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7671 return 1;
7672
7673 /* Look inside a TOC section too. */
7674 if (h != NULL)
7675 {
7676 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7677 off = h->root.u.def.value;
7678 }
7679 else
7680 off = sym->st_value;
7681 off += rel->r_addend;
7682 BFD_ASSERT (off % 8 == 0);
7683 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7684 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7685 if (toc_symndx != NULL)
7686 *toc_symndx = r_symndx;
7687 if (toc_addend != NULL)
7688 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7689 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7690 return 0;
7691 if ((h == NULL || is_static_defined (h))
7692 && (next_r == -1 || next_r == -2))
7693 return 1 - next_r;
7694 return 1;
7695 }
7696
7697 /* Find (or create) an entry in the tocsave hash table. */
7698
7699 static struct tocsave_entry *
7700 tocsave_find (struct ppc_link_hash_table *htab,
7701 enum insert_option insert,
7702 Elf_Internal_Sym **local_syms,
7703 const Elf_Internal_Rela *irela,
7704 bfd *ibfd)
7705 {
7706 unsigned long r_indx;
7707 struct elf_link_hash_entry *h;
7708 Elf_Internal_Sym *sym;
7709 struct tocsave_entry ent, *p;
7710 hashval_t hash;
7711 struct tocsave_entry **slot;
7712
7713 r_indx = ELF64_R_SYM (irela->r_info);
7714 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7715 return NULL;
7716 if (ent.sec == NULL || ent.sec->output_section == NULL)
7717 {
7718 _bfd_error_handler
7719 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7720 return NULL;
7721 }
7722
7723 if (h != NULL)
7724 ent.offset = h->root.u.def.value;
7725 else
7726 ent.offset = sym->st_value;
7727 ent.offset += irela->r_addend;
7728
7729 hash = tocsave_htab_hash (&ent);
7730 slot = ((struct tocsave_entry **)
7731 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7732 if (slot == NULL)
7733 return NULL;
7734
7735 if (*slot == NULL)
7736 {
7737 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7738 if (p == NULL)
7739 return NULL;
7740 *p = ent;
7741 *slot = p;
7742 }
7743 return *slot;
7744 }
7745
7746 /* Adjust all global syms defined in opd sections. In gcc generated
7747 code for the old ABI, these will already have been done. */
7748
7749 static bfd_boolean
7750 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7751 {
7752 struct ppc_link_hash_entry *eh;
7753 asection *sym_sec;
7754 struct _opd_sec_data *opd;
7755
7756 if (h->root.type == bfd_link_hash_indirect)
7757 return TRUE;
7758
7759 if (h->root.type != bfd_link_hash_defined
7760 && h->root.type != bfd_link_hash_defweak)
7761 return TRUE;
7762
7763 eh = (struct ppc_link_hash_entry *) h;
7764 if (eh->adjust_done)
7765 return TRUE;
7766
7767 sym_sec = eh->elf.root.u.def.section;
7768 opd = get_opd_info (sym_sec);
7769 if (opd != NULL && opd->adjust != NULL)
7770 {
7771 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7772 if (adjust == -1)
7773 {
7774 /* This entry has been deleted. */
7775 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7776 if (dsec == NULL)
7777 {
7778 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7779 if (discarded_section (dsec))
7780 {
7781 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7782 break;
7783 }
7784 }
7785 eh->elf.root.u.def.value = 0;
7786 eh->elf.root.u.def.section = dsec;
7787 }
7788 else
7789 eh->elf.root.u.def.value += adjust;
7790 eh->adjust_done = 1;
7791 }
7792 return TRUE;
7793 }
7794
7795 /* Handles decrementing dynamic reloc counts for the reloc specified by
7796 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7797 have already been determined. */
7798
7799 static bfd_boolean
7800 dec_dynrel_count (bfd_vma r_info,
7801 asection *sec,
7802 struct bfd_link_info *info,
7803 Elf_Internal_Sym **local_syms,
7804 struct elf_link_hash_entry *h,
7805 Elf_Internal_Sym *sym)
7806 {
7807 enum elf_ppc64_reloc_type r_type;
7808 asection *sym_sec = NULL;
7809
7810 /* Can this reloc be dynamic? This switch, and later tests here
7811 should be kept in sync with the code in check_relocs. */
7812 r_type = ELF64_R_TYPE (r_info);
7813 switch (r_type)
7814 {
7815 default:
7816 return TRUE;
7817
7818 case R_PPC64_TPREL16:
7819 case R_PPC64_TPREL16_LO:
7820 case R_PPC64_TPREL16_HI:
7821 case R_PPC64_TPREL16_HA:
7822 case R_PPC64_TPREL16_DS:
7823 case R_PPC64_TPREL16_LO_DS:
7824 case R_PPC64_TPREL16_HIGH:
7825 case R_PPC64_TPREL16_HIGHA:
7826 case R_PPC64_TPREL16_HIGHER:
7827 case R_PPC64_TPREL16_HIGHERA:
7828 case R_PPC64_TPREL16_HIGHEST:
7829 case R_PPC64_TPREL16_HIGHESTA:
7830 case R_PPC64_TPREL64:
7831 case R_PPC64_DTPMOD64:
7832 case R_PPC64_DTPREL64:
7833 case R_PPC64_ADDR64:
7834 case R_PPC64_REL30:
7835 case R_PPC64_REL32:
7836 case R_PPC64_REL64:
7837 case R_PPC64_ADDR14:
7838 case R_PPC64_ADDR14_BRNTAKEN:
7839 case R_PPC64_ADDR14_BRTAKEN:
7840 case R_PPC64_ADDR16:
7841 case R_PPC64_ADDR16_DS:
7842 case R_PPC64_ADDR16_HA:
7843 case R_PPC64_ADDR16_HI:
7844 case R_PPC64_ADDR16_HIGH:
7845 case R_PPC64_ADDR16_HIGHA:
7846 case R_PPC64_ADDR16_HIGHER:
7847 case R_PPC64_ADDR16_HIGHERA:
7848 case R_PPC64_ADDR16_HIGHEST:
7849 case R_PPC64_ADDR16_HIGHESTA:
7850 case R_PPC64_ADDR16_LO:
7851 case R_PPC64_ADDR16_LO_DS:
7852 case R_PPC64_ADDR24:
7853 case R_PPC64_ADDR32:
7854 case R_PPC64_UADDR16:
7855 case R_PPC64_UADDR32:
7856 case R_PPC64_UADDR64:
7857 case R_PPC64_TOC:
7858 break;
7859 }
7860
7861 if (local_syms != NULL)
7862 {
7863 unsigned long r_symndx;
7864 bfd *ibfd = sec->owner;
7865
7866 r_symndx = ELF64_R_SYM (r_info);
7867 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7868 return FALSE;
7869 }
7870
7871 if ((bfd_link_pic (info)
7872 && (must_be_dyn_reloc (info, r_type)
7873 || (h != NULL
7874 && (!SYMBOLIC_BIND (info, h)
7875 || h->root.type == bfd_link_hash_defweak
7876 || !h->def_regular))))
7877 || (ELIMINATE_COPY_RELOCS
7878 && !bfd_link_pic (info)
7879 && h != NULL
7880 && (h->root.type == bfd_link_hash_defweak
7881 || !h->def_regular)))
7882 ;
7883 else
7884 return TRUE;
7885
7886 if (h != NULL)
7887 {
7888 struct elf_dyn_relocs *p;
7889 struct elf_dyn_relocs **pp;
7890 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7891
7892 /* elf_gc_sweep may have already removed all dyn relocs associated
7893 with local syms for a given section. Also, symbol flags are
7894 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7895 report a dynreloc miscount. */
7896 if (*pp == NULL && info->gc_sections)
7897 return TRUE;
7898
7899 while ((p = *pp) != NULL)
7900 {
7901 if (p->sec == sec)
7902 {
7903 if (!must_be_dyn_reloc (info, r_type))
7904 p->pc_count -= 1;
7905 p->count -= 1;
7906 if (p->count == 0)
7907 *pp = p->next;
7908 return TRUE;
7909 }
7910 pp = &p->next;
7911 }
7912 }
7913 else
7914 {
7915 struct ppc_dyn_relocs *p;
7916 struct ppc_dyn_relocs **pp;
7917 void *vpp;
7918 bfd_boolean is_ifunc;
7919
7920 if (local_syms == NULL)
7921 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7922 if (sym_sec == NULL)
7923 sym_sec = sec;
7924
7925 vpp = &elf_section_data (sym_sec)->local_dynrel;
7926 pp = (struct ppc_dyn_relocs **) vpp;
7927
7928 if (*pp == NULL && info->gc_sections)
7929 return TRUE;
7930
7931 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7932 while ((p = *pp) != NULL)
7933 {
7934 if (p->sec == sec && p->ifunc == is_ifunc)
7935 {
7936 p->count -= 1;
7937 if (p->count == 0)
7938 *pp = p->next;
7939 return TRUE;
7940 }
7941 pp = &p->next;
7942 }
7943 }
7944
7945 /* xgettext:c-format */
7946 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7947 sec->owner, sec);
7948 bfd_set_error (bfd_error_bad_value);
7949 return FALSE;
7950 }
7951
7952 /* Remove unused Official Procedure Descriptor entries. Currently we
7953 only remove those associated with functions in discarded link-once
7954 sections, or weakly defined functions that have been overridden. It
7955 would be possible to remove many more entries for statically linked
7956 applications. */
7957
7958 bfd_boolean
7959 ppc64_elf_edit_opd (struct bfd_link_info *info)
7960 {
7961 bfd *ibfd;
7962 bfd_boolean some_edited = FALSE;
7963 asection *need_pad = NULL;
7964 struct ppc_link_hash_table *htab;
7965
7966 htab = ppc_hash_table (info);
7967 if (htab == NULL)
7968 return FALSE;
7969
7970 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7971 {
7972 asection *sec;
7973 Elf_Internal_Rela *relstart, *rel, *relend;
7974 Elf_Internal_Shdr *symtab_hdr;
7975 Elf_Internal_Sym *local_syms;
7976 struct _opd_sec_data *opd;
7977 bfd_boolean need_edit, add_aux_fields, broken;
7978 bfd_size_type cnt_16b = 0;
7979
7980 if (!is_ppc64_elf (ibfd))
7981 continue;
7982
7983 sec = bfd_get_section_by_name (ibfd, ".opd");
7984 if (sec == NULL || sec->size == 0)
7985 continue;
7986
7987 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7988 continue;
7989
7990 if (sec->output_section == bfd_abs_section_ptr)
7991 continue;
7992
7993 /* Look through the section relocs. */
7994 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7995 continue;
7996
7997 local_syms = NULL;
7998 symtab_hdr = &elf_symtab_hdr (ibfd);
7999
8000 /* Read the relocations. */
8001 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8002 info->keep_memory);
8003 if (relstart == NULL)
8004 return FALSE;
8005
8006 /* First run through the relocs to check they are sane, and to
8007 determine whether we need to edit this opd section. */
8008 need_edit = FALSE;
8009 broken = FALSE;
8010 need_pad = sec;
8011 relend = relstart + sec->reloc_count;
8012 for (rel = relstart; rel < relend; )
8013 {
8014 enum elf_ppc64_reloc_type r_type;
8015 unsigned long r_symndx;
8016 asection *sym_sec;
8017 struct elf_link_hash_entry *h;
8018 Elf_Internal_Sym *sym;
8019 bfd_vma offset;
8020
8021 /* .opd contains an array of 16 or 24 byte entries. We're
8022 only interested in the reloc pointing to a function entry
8023 point. */
8024 offset = rel->r_offset;
8025 if (rel + 1 == relend
8026 || rel[1].r_offset != offset + 8)
8027 {
8028 /* If someone messes with .opd alignment then after a
8029 "ld -r" we might have padding in the middle of .opd.
8030 Also, there's nothing to prevent someone putting
8031 something silly in .opd with the assembler. No .opd
8032 optimization for them! */
8033 broken_opd:
8034 _bfd_error_handler
8035 (_("%B: .opd is not a regular array of opd entries"), ibfd);
8036 broken = TRUE;
8037 break;
8038 }
8039
8040 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
8041 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
8042 {
8043 _bfd_error_handler
8044 /* xgettext:c-format */
8045 (_("%B: unexpected reloc type %u in .opd section"),
8046 ibfd, r_type);
8047 broken = TRUE;
8048 break;
8049 }
8050
8051 r_symndx = ELF64_R_SYM (rel->r_info);
8052 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8053 r_symndx, ibfd))
8054 goto error_ret;
8055
8056 if (sym_sec == NULL || sym_sec->owner == NULL)
8057 {
8058 const char *sym_name;
8059 if (h != NULL)
8060 sym_name = h->root.root.string;
8061 else
8062 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8063 sym_sec);
8064
8065 _bfd_error_handler
8066 /* xgettext:c-format */
8067 (_("%B: undefined sym `%s' in .opd section"),
8068 ibfd, sym_name);
8069 broken = TRUE;
8070 break;
8071 }
8072
8073 /* opd entries are always for functions defined in the
8074 current input bfd. If the symbol isn't defined in the
8075 input bfd, then we won't be using the function in this
8076 bfd; It must be defined in a linkonce section in another
8077 bfd, or is weak. It's also possible that we are
8078 discarding the function due to a linker script /DISCARD/,
8079 which we test for via the output_section. */
8080 if (sym_sec->owner != ibfd
8081 || sym_sec->output_section == bfd_abs_section_ptr)
8082 need_edit = TRUE;
8083
8084 rel += 2;
8085 if (rel + 1 == relend
8086 || (rel + 2 < relend
8087 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8088 ++rel;
8089
8090 if (rel == relend)
8091 {
8092 if (sec->size == offset + 24)
8093 {
8094 need_pad = NULL;
8095 break;
8096 }
8097 if (sec->size == offset + 16)
8098 {
8099 cnt_16b++;
8100 break;
8101 }
8102 goto broken_opd;
8103 }
8104 else if (rel + 1 < relend
8105 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8106 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8107 {
8108 if (rel[0].r_offset == offset + 16)
8109 cnt_16b++;
8110 else if (rel[0].r_offset != offset + 24)
8111 goto broken_opd;
8112 }
8113 else
8114 goto broken_opd;
8115 }
8116
8117 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8118
8119 if (!broken && (need_edit || add_aux_fields))
8120 {
8121 Elf_Internal_Rela *write_rel;
8122 Elf_Internal_Shdr *rel_hdr;
8123 bfd_byte *rptr, *wptr;
8124 bfd_byte *new_contents;
8125 bfd_size_type amt;
8126
8127 new_contents = NULL;
8128 amt = OPD_NDX (sec->size) * sizeof (long);
8129 opd = &ppc64_elf_section_data (sec)->u.opd;
8130 opd->adjust = bfd_zalloc (sec->owner, amt);
8131 if (opd->adjust == NULL)
8132 return FALSE;
8133
8134 /* This seems a waste of time as input .opd sections are all
8135 zeros as generated by gcc, but I suppose there's no reason
8136 this will always be so. We might start putting something in
8137 the third word of .opd entries. */
8138 if ((sec->flags & SEC_IN_MEMORY) == 0)
8139 {
8140 bfd_byte *loc;
8141 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8142 {
8143 if (loc != NULL)
8144 free (loc);
8145 error_ret:
8146 if (local_syms != NULL
8147 && symtab_hdr->contents != (unsigned char *) local_syms)
8148 free (local_syms);
8149 if (elf_section_data (sec)->relocs != relstart)
8150 free (relstart);
8151 return FALSE;
8152 }
8153 sec->contents = loc;
8154 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8155 }
8156
8157 elf_section_data (sec)->relocs = relstart;
8158
8159 new_contents = sec->contents;
8160 if (add_aux_fields)
8161 {
8162 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8163 if (new_contents == NULL)
8164 return FALSE;
8165 need_pad = NULL;
8166 }
8167 wptr = new_contents;
8168 rptr = sec->contents;
8169 write_rel = relstart;
8170 for (rel = relstart; rel < relend; )
8171 {
8172 unsigned long r_symndx;
8173 asection *sym_sec;
8174 struct elf_link_hash_entry *h;
8175 struct ppc_link_hash_entry *fdh = NULL;
8176 Elf_Internal_Sym *sym;
8177 long opd_ent_size;
8178 Elf_Internal_Rela *next_rel;
8179 bfd_boolean skip;
8180
8181 r_symndx = ELF64_R_SYM (rel->r_info);
8182 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8183 r_symndx, ibfd))
8184 goto error_ret;
8185
8186 next_rel = rel + 2;
8187 if (next_rel + 1 == relend
8188 || (next_rel + 2 < relend
8189 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8190 ++next_rel;
8191
8192 /* See if the .opd entry is full 24 byte or
8193 16 byte (with fd_aux entry overlapped with next
8194 fd_func). */
8195 opd_ent_size = 24;
8196 if (next_rel == relend)
8197 {
8198 if (sec->size == rel->r_offset + 16)
8199 opd_ent_size = 16;
8200 }
8201 else if (next_rel->r_offset == rel->r_offset + 16)
8202 opd_ent_size = 16;
8203
8204 if (h != NULL
8205 && h->root.root.string[0] == '.')
8206 {
8207 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8208 if (fdh != NULL)
8209 {
8210 fdh = ppc_follow_link (fdh);
8211 if (fdh->elf.root.type != bfd_link_hash_defined
8212 && fdh->elf.root.type != bfd_link_hash_defweak)
8213 fdh = NULL;
8214 }
8215 }
8216
8217 skip = (sym_sec->owner != ibfd
8218 || sym_sec->output_section == bfd_abs_section_ptr);
8219 if (skip)
8220 {
8221 if (fdh != NULL && sym_sec->owner == ibfd)
8222 {
8223 /* Arrange for the function descriptor sym
8224 to be dropped. */
8225 fdh->elf.root.u.def.value = 0;
8226 fdh->elf.root.u.def.section = sym_sec;
8227 }
8228 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8229
8230 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8231 rel = next_rel;
8232 else
8233 while (1)
8234 {
8235 if (!dec_dynrel_count (rel->r_info, sec, info,
8236 NULL, h, sym))
8237 goto error_ret;
8238
8239 if (++rel == next_rel)
8240 break;
8241
8242 r_symndx = ELF64_R_SYM (rel->r_info);
8243 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8244 r_symndx, ibfd))
8245 goto error_ret;
8246 }
8247 }
8248 else
8249 {
8250 /* We'll be keeping this opd entry. */
8251 long adjust;
8252
8253 if (fdh != NULL)
8254 {
8255 /* Redefine the function descriptor symbol to
8256 this location in the opd section. It is
8257 necessary to update the value here rather
8258 than using an array of adjustments as we do
8259 for local symbols, because various places
8260 in the generic ELF code use the value
8261 stored in u.def.value. */
8262 fdh->elf.root.u.def.value = wptr - new_contents;
8263 fdh->adjust_done = 1;
8264 }
8265
8266 /* Local syms are a bit tricky. We could
8267 tweak them as they can be cached, but
8268 we'd need to look through the local syms
8269 for the function descriptor sym which we
8270 don't have at the moment. So keep an
8271 array of adjustments. */
8272 adjust = (wptr - new_contents) - (rptr - sec->contents);
8273 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8274
8275 if (wptr != rptr)
8276 memcpy (wptr, rptr, opd_ent_size);
8277 wptr += opd_ent_size;
8278 if (add_aux_fields && opd_ent_size == 16)
8279 {
8280 memset (wptr, '\0', 8);
8281 wptr += 8;
8282 }
8283
8284 /* We need to adjust any reloc offsets to point to the
8285 new opd entries. */
8286 for ( ; rel != next_rel; ++rel)
8287 {
8288 rel->r_offset += adjust;
8289 if (write_rel != rel)
8290 memcpy (write_rel, rel, sizeof (*rel));
8291 ++write_rel;
8292 }
8293 }
8294
8295 rptr += opd_ent_size;
8296 }
8297
8298 sec->size = wptr - new_contents;
8299 sec->reloc_count = write_rel - relstart;
8300 if (add_aux_fields)
8301 {
8302 free (sec->contents);
8303 sec->contents = new_contents;
8304 }
8305
8306 /* Fudge the header size too, as this is used later in
8307 elf_bfd_final_link if we are emitting relocs. */
8308 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8309 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8310 some_edited = TRUE;
8311 }
8312 else if (elf_section_data (sec)->relocs != relstart)
8313 free (relstart);
8314
8315 if (local_syms != NULL
8316 && symtab_hdr->contents != (unsigned char *) local_syms)
8317 {
8318 if (!info->keep_memory)
8319 free (local_syms);
8320 else
8321 symtab_hdr->contents = (unsigned char *) local_syms;
8322 }
8323 }
8324
8325 if (some_edited)
8326 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8327
8328 /* If we are doing a final link and the last .opd entry is just 16 byte
8329 long, add a 8 byte padding after it. */
8330 if (need_pad != NULL && !bfd_link_relocatable (info))
8331 {
8332 bfd_byte *p;
8333
8334 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8335 {
8336 BFD_ASSERT (need_pad->size > 0);
8337
8338 p = bfd_malloc (need_pad->size + 8);
8339 if (p == NULL)
8340 return FALSE;
8341
8342 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8343 p, 0, need_pad->size))
8344 return FALSE;
8345
8346 need_pad->contents = p;
8347 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8348 }
8349 else
8350 {
8351 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8352 if (p == NULL)
8353 return FALSE;
8354
8355 need_pad->contents = p;
8356 }
8357
8358 memset (need_pad->contents + need_pad->size, 0, 8);
8359 need_pad->size += 8;
8360 }
8361
8362 return TRUE;
8363 }
8364
8365 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8366
8367 asection *
8368 ppc64_elf_tls_setup (struct bfd_link_info *info)
8369 {
8370 struct ppc_link_hash_table *htab;
8371
8372 htab = ppc_hash_table (info);
8373 if (htab == NULL)
8374 return NULL;
8375
8376 if (abiversion (info->output_bfd) == 1)
8377 htab->opd_abi = 1;
8378
8379 if (htab->params->no_multi_toc)
8380 htab->do_multi_toc = 0;
8381 else if (!htab->do_multi_toc)
8382 htab->params->no_multi_toc = 1;
8383
8384 /* Default to --no-plt-localentry, as this option can cause problems
8385 with symbol interposition. For example, glibc libpthread.so and
8386 libc.so duplicate many pthread symbols, with a fallback
8387 implementation in libc.so. In some cases the fallback does more
8388 work than the pthread implementation. __pthread_condattr_destroy
8389 is one such symbol: the libpthread.so implementation is
8390 localentry:0 while the libc.so implementation is localentry:8.
8391 An app that "cleverly" uses dlopen to only load necessary
8392 libraries at runtime may omit loading libpthread.so when not
8393 running multi-threaded, which then results in the libc.so
8394 fallback symbols being used and ld.so complaining. Now there
8395 are workarounds in ld (see non_zero_localentry) to detect the
8396 pthread situation, but that may not be the only case where
8397 --plt-localentry can cause trouble. */
8398 if (htab->params->plt_localentry0 < 0)
8399 htab->params->plt_localentry0 = 0;
8400 if (htab->params->plt_localentry0
8401 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8402 FALSE, FALSE, FALSE) == NULL)
8403 info->callbacks->einfo
8404 (_("%P: warning: --plt-localentry is especially dangerous without "
8405 "ld.so support to detect ABI violations.\n"));
8406
8407 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8408 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8409 FALSE, FALSE, TRUE));
8410 /* Move dynamic linking info to the function descriptor sym. */
8411 if (htab->tls_get_addr != NULL)
8412 func_desc_adjust (&htab->tls_get_addr->elf, info);
8413 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8414 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8415 FALSE, FALSE, TRUE));
8416 if (htab->params->tls_get_addr_opt)
8417 {
8418 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8419
8420 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8421 FALSE, FALSE, TRUE);
8422 if (opt != NULL)
8423 func_desc_adjust (opt, info);
8424 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8425 FALSE, FALSE, TRUE);
8426 if (opt_fd != NULL
8427 && (opt_fd->root.type == bfd_link_hash_defined
8428 || opt_fd->root.type == bfd_link_hash_defweak))
8429 {
8430 /* If glibc supports an optimized __tls_get_addr call stub,
8431 signalled by the presence of __tls_get_addr_opt, and we'll
8432 be calling __tls_get_addr via a plt call stub, then
8433 make __tls_get_addr point to __tls_get_addr_opt. */
8434 tga_fd = &htab->tls_get_addr_fd->elf;
8435 if (htab->elf.dynamic_sections_created
8436 && tga_fd != NULL
8437 && (tga_fd->type == STT_FUNC
8438 || tga_fd->needs_plt)
8439 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8440 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8441 {
8442 struct plt_entry *ent;
8443
8444 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8445 if (ent->plt.refcount > 0)
8446 break;
8447 if (ent != NULL)
8448 {
8449 tga_fd->root.type = bfd_link_hash_indirect;
8450 tga_fd->root.u.i.link = &opt_fd->root;
8451 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8452 opt_fd->mark = 1;
8453 if (opt_fd->dynindx != -1)
8454 {
8455 /* Use __tls_get_addr_opt in dynamic relocations. */
8456 opt_fd->dynindx = -1;
8457 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8458 opt_fd->dynstr_index);
8459 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8460 return NULL;
8461 }
8462 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8463 tga = &htab->tls_get_addr->elf;
8464 if (opt != NULL && tga != NULL)
8465 {
8466 tga->root.type = bfd_link_hash_indirect;
8467 tga->root.u.i.link = &opt->root;
8468 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8469 opt->mark = 1;
8470 _bfd_elf_link_hash_hide_symbol (info, opt,
8471 tga->forced_local);
8472 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8473 }
8474 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8475 htab->tls_get_addr_fd->is_func_descriptor = 1;
8476 if (htab->tls_get_addr != NULL)
8477 {
8478 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8479 htab->tls_get_addr->is_func = 1;
8480 }
8481 }
8482 }
8483 }
8484 else if (htab->params->tls_get_addr_opt < 0)
8485 htab->params->tls_get_addr_opt = 0;
8486 }
8487 return _bfd_elf_tls_setup (info->output_bfd, info);
8488 }
8489
8490 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8491 HASH1 or HASH2. */
8492
8493 static bfd_boolean
8494 branch_reloc_hash_match (const bfd *ibfd,
8495 const Elf_Internal_Rela *rel,
8496 const struct ppc_link_hash_entry *hash1,
8497 const struct ppc_link_hash_entry *hash2)
8498 {
8499 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8500 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8501 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8502
8503 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8504 {
8505 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8506 struct elf_link_hash_entry *h;
8507
8508 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8509 h = elf_follow_link (h);
8510 if (h == &hash1->elf || h == &hash2->elf)
8511 return TRUE;
8512 }
8513 return FALSE;
8514 }
8515
8516 /* Run through all the TLS relocs looking for optimization
8517 opportunities. The linker has been hacked (see ppc64elf.em) to do
8518 a preliminary section layout so that we know the TLS segment
8519 offsets. We can't optimize earlier because some optimizations need
8520 to know the tp offset, and we need to optimize before allocating
8521 dynamic relocations. */
8522
8523 bfd_boolean
8524 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8525 {
8526 bfd *ibfd;
8527 asection *sec;
8528 struct ppc_link_hash_table *htab;
8529 unsigned char *toc_ref;
8530 int pass;
8531
8532 if (!bfd_link_executable (info))
8533 return TRUE;
8534
8535 htab = ppc_hash_table (info);
8536 if (htab == NULL)
8537 return FALSE;
8538
8539 /* Make two passes over the relocs. On the first pass, mark toc
8540 entries involved with tls relocs, and check that tls relocs
8541 involved in setting up a tls_get_addr call are indeed followed by
8542 such a call. If they are not, we can't do any tls optimization.
8543 On the second pass twiddle tls_mask flags to notify
8544 relocate_section that optimization can be done, and adjust got
8545 and plt refcounts. */
8546 toc_ref = NULL;
8547 for (pass = 0; pass < 2; ++pass)
8548 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8549 {
8550 Elf_Internal_Sym *locsyms = NULL;
8551 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8552
8553 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8554 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8555 {
8556 Elf_Internal_Rela *relstart, *rel, *relend;
8557 bfd_boolean found_tls_get_addr_arg = 0;
8558
8559 /* Read the relocations. */
8560 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8561 info->keep_memory);
8562 if (relstart == NULL)
8563 {
8564 free (toc_ref);
8565 return FALSE;
8566 }
8567
8568 relend = relstart + sec->reloc_count;
8569 for (rel = relstart; rel < relend; rel++)
8570 {
8571 enum elf_ppc64_reloc_type r_type;
8572 unsigned long r_symndx;
8573 struct elf_link_hash_entry *h;
8574 Elf_Internal_Sym *sym;
8575 asection *sym_sec;
8576 unsigned char *tls_mask;
8577 unsigned char tls_set, tls_clear, tls_type = 0;
8578 bfd_vma value;
8579 bfd_boolean ok_tprel, is_local;
8580 long toc_ref_index = 0;
8581 int expecting_tls_get_addr = 0;
8582 bfd_boolean ret = FALSE;
8583
8584 r_symndx = ELF64_R_SYM (rel->r_info);
8585 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8586 r_symndx, ibfd))
8587 {
8588 err_free_rel:
8589 if (elf_section_data (sec)->relocs != relstart)
8590 free (relstart);
8591 if (toc_ref != NULL)
8592 free (toc_ref);
8593 if (locsyms != NULL
8594 && (elf_symtab_hdr (ibfd).contents
8595 != (unsigned char *) locsyms))
8596 free (locsyms);
8597 return ret;
8598 }
8599
8600 if (h != NULL)
8601 {
8602 if (h->root.type == bfd_link_hash_defined
8603 || h->root.type == bfd_link_hash_defweak)
8604 value = h->root.u.def.value;
8605 else if (h->root.type == bfd_link_hash_undefweak)
8606 value = 0;
8607 else
8608 {
8609 found_tls_get_addr_arg = 0;
8610 continue;
8611 }
8612 }
8613 else
8614 /* Symbols referenced by TLS relocs must be of type
8615 STT_TLS. So no need for .opd local sym adjust. */
8616 value = sym->st_value;
8617
8618 ok_tprel = FALSE;
8619 is_local = FALSE;
8620 if (h == NULL
8621 || !h->def_dynamic)
8622 {
8623 is_local = TRUE;
8624 if (h != NULL
8625 && h->root.type == bfd_link_hash_undefweak)
8626 ok_tprel = TRUE;
8627 else if (sym_sec != NULL
8628 && sym_sec->output_section != NULL)
8629 {
8630 value += sym_sec->output_offset;
8631 value += sym_sec->output_section->vma;
8632 value -= htab->elf.tls_sec->vma;
8633 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8634 < (bfd_vma) 1 << 32);
8635 }
8636 }
8637
8638 r_type = ELF64_R_TYPE (rel->r_info);
8639 /* If this section has old-style __tls_get_addr calls
8640 without marker relocs, then check that each
8641 __tls_get_addr call reloc is preceded by a reloc
8642 that conceivably belongs to the __tls_get_addr arg
8643 setup insn. If we don't find matching arg setup
8644 relocs, don't do any tls optimization. */
8645 if (pass == 0
8646 && sec->has_tls_get_addr_call
8647 && h != NULL
8648 && (h == &htab->tls_get_addr->elf
8649 || h == &htab->tls_get_addr_fd->elf)
8650 && !found_tls_get_addr_arg
8651 && is_branch_reloc (r_type))
8652 {
8653 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8654 "TLS optimization disabled\n"),
8655 ibfd, sec, rel->r_offset);
8656 ret = TRUE;
8657 goto err_free_rel;
8658 }
8659
8660 found_tls_get_addr_arg = 0;
8661 switch (r_type)
8662 {
8663 case R_PPC64_GOT_TLSLD16:
8664 case R_PPC64_GOT_TLSLD16_LO:
8665 expecting_tls_get_addr = 1;
8666 found_tls_get_addr_arg = 1;
8667 /* Fall through. */
8668
8669 case R_PPC64_GOT_TLSLD16_HI:
8670 case R_PPC64_GOT_TLSLD16_HA:
8671 /* These relocs should never be against a symbol
8672 defined in a shared lib. Leave them alone if
8673 that turns out to be the case. */
8674 if (!is_local)
8675 continue;
8676
8677 /* LD -> LE */
8678 tls_set = 0;
8679 tls_clear = TLS_LD;
8680 tls_type = TLS_TLS | TLS_LD;
8681 break;
8682
8683 case R_PPC64_GOT_TLSGD16:
8684 case R_PPC64_GOT_TLSGD16_LO:
8685 expecting_tls_get_addr = 1;
8686 found_tls_get_addr_arg = 1;
8687 /* Fall through. */
8688
8689 case R_PPC64_GOT_TLSGD16_HI:
8690 case R_PPC64_GOT_TLSGD16_HA:
8691 if (ok_tprel)
8692 /* GD -> LE */
8693 tls_set = 0;
8694 else
8695 /* GD -> IE */
8696 tls_set = TLS_TLS | TLS_TPRELGD;
8697 tls_clear = TLS_GD;
8698 tls_type = TLS_TLS | TLS_GD;
8699 break;
8700
8701 case R_PPC64_GOT_TPREL16_DS:
8702 case R_PPC64_GOT_TPREL16_LO_DS:
8703 case R_PPC64_GOT_TPREL16_HI:
8704 case R_PPC64_GOT_TPREL16_HA:
8705 if (ok_tprel)
8706 {
8707 /* IE -> LE */
8708 tls_set = 0;
8709 tls_clear = TLS_TPREL;
8710 tls_type = TLS_TLS | TLS_TPREL;
8711 break;
8712 }
8713 continue;
8714
8715 case R_PPC64_TLSGD:
8716 case R_PPC64_TLSLD:
8717 found_tls_get_addr_arg = 1;
8718 /* Fall through. */
8719
8720 case R_PPC64_TLS:
8721 case R_PPC64_TOC16:
8722 case R_PPC64_TOC16_LO:
8723 if (sym_sec == NULL || sym_sec != toc)
8724 continue;
8725
8726 /* Mark this toc entry as referenced by a TLS
8727 code sequence. We can do that now in the
8728 case of R_PPC64_TLS, and after checking for
8729 tls_get_addr for the TOC16 relocs. */
8730 if (toc_ref == NULL)
8731 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8732 if (toc_ref == NULL)
8733 goto err_free_rel;
8734
8735 if (h != NULL)
8736 value = h->root.u.def.value;
8737 else
8738 value = sym->st_value;
8739 value += rel->r_addend;
8740 if (value % 8 != 0)
8741 continue;
8742 BFD_ASSERT (value < toc->size
8743 && toc->output_offset % 8 == 0);
8744 toc_ref_index = (value + toc->output_offset) / 8;
8745 if (r_type == R_PPC64_TLS
8746 || r_type == R_PPC64_TLSGD
8747 || r_type == R_PPC64_TLSLD)
8748 {
8749 toc_ref[toc_ref_index] = 1;
8750 continue;
8751 }
8752
8753 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8754 continue;
8755
8756 tls_set = 0;
8757 tls_clear = 0;
8758 expecting_tls_get_addr = 2;
8759 break;
8760
8761 case R_PPC64_TPREL64:
8762 if (pass == 0
8763 || sec != toc
8764 || toc_ref == NULL
8765 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8766 continue;
8767 if (ok_tprel)
8768 {
8769 /* IE -> LE */
8770 tls_set = TLS_EXPLICIT;
8771 tls_clear = TLS_TPREL;
8772 break;
8773 }
8774 continue;
8775
8776 case R_PPC64_DTPMOD64:
8777 if (pass == 0
8778 || sec != toc
8779 || toc_ref == NULL
8780 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8781 continue;
8782 if (rel + 1 < relend
8783 && (rel[1].r_info
8784 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8785 && rel[1].r_offset == rel->r_offset + 8)
8786 {
8787 if (ok_tprel)
8788 /* GD -> LE */
8789 tls_set = TLS_EXPLICIT | TLS_GD;
8790 else
8791 /* GD -> IE */
8792 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8793 tls_clear = TLS_GD;
8794 }
8795 else
8796 {
8797 if (!is_local)
8798 continue;
8799
8800 /* LD -> LE */
8801 tls_set = TLS_EXPLICIT;
8802 tls_clear = TLS_LD;
8803 }
8804 break;
8805
8806 default:
8807 continue;
8808 }
8809
8810 if (pass == 0)
8811 {
8812 if (!expecting_tls_get_addr
8813 || !sec->has_tls_get_addr_call)
8814 continue;
8815
8816 if (rel + 1 < relend
8817 && branch_reloc_hash_match (ibfd, rel + 1,
8818 htab->tls_get_addr,
8819 htab->tls_get_addr_fd))
8820 {
8821 if (expecting_tls_get_addr == 2)
8822 {
8823 /* Check for toc tls entries. */
8824 unsigned char *toc_tls;
8825 int retval;
8826
8827 retval = get_tls_mask (&toc_tls, NULL, NULL,
8828 &locsyms,
8829 rel, ibfd);
8830 if (retval == 0)
8831 goto err_free_rel;
8832 if (toc_tls != NULL)
8833 {
8834 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8835 found_tls_get_addr_arg = 1;
8836 if (retval > 1)
8837 toc_ref[toc_ref_index] = 1;
8838 }
8839 }
8840 continue;
8841 }
8842
8843 if (expecting_tls_get_addr != 1)
8844 continue;
8845
8846 /* Uh oh, we didn't find the expected call. We
8847 could just mark this symbol to exclude it
8848 from tls optimization but it's safer to skip
8849 the entire optimization. */
8850 /* xgettext:c-format */
8851 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8852 "TLS optimization disabled\n"),
8853 ibfd, sec, rel->r_offset);
8854 ret = TRUE;
8855 goto err_free_rel;
8856 }
8857
8858 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8859 {
8860 struct plt_entry *ent;
8861 for (ent = htab->tls_get_addr->elf.plt.plist;
8862 ent != NULL;
8863 ent = ent->next)
8864 if (ent->addend == 0)
8865 {
8866 if (ent->plt.refcount > 0)
8867 {
8868 ent->plt.refcount -= 1;
8869 expecting_tls_get_addr = 0;
8870 }
8871 break;
8872 }
8873 }
8874
8875 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8876 {
8877 struct plt_entry *ent;
8878 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8879 ent != NULL;
8880 ent = ent->next)
8881 if (ent->addend == 0)
8882 {
8883 if (ent->plt.refcount > 0)
8884 ent->plt.refcount -= 1;
8885 break;
8886 }
8887 }
8888
8889 if (tls_clear == 0)
8890 continue;
8891
8892 if ((tls_set & TLS_EXPLICIT) == 0)
8893 {
8894 struct got_entry *ent;
8895
8896 /* Adjust got entry for this reloc. */
8897 if (h != NULL)
8898 ent = h->got.glist;
8899 else
8900 ent = elf_local_got_ents (ibfd)[r_symndx];
8901
8902 for (; ent != NULL; ent = ent->next)
8903 if (ent->addend == rel->r_addend
8904 && ent->owner == ibfd
8905 && ent->tls_type == tls_type)
8906 break;
8907 if (ent == NULL)
8908 abort ();
8909
8910 if (tls_set == 0)
8911 {
8912 /* We managed to get rid of a got entry. */
8913 if (ent->got.refcount > 0)
8914 ent->got.refcount -= 1;
8915 }
8916 }
8917 else
8918 {
8919 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8920 we'll lose one or two dyn relocs. */
8921 if (!dec_dynrel_count (rel->r_info, sec, info,
8922 NULL, h, sym))
8923 return FALSE;
8924
8925 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8926 {
8927 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8928 NULL, h, sym))
8929 return FALSE;
8930 }
8931 }
8932
8933 *tls_mask |= tls_set;
8934 *tls_mask &= ~tls_clear;
8935 }
8936
8937 if (elf_section_data (sec)->relocs != relstart)
8938 free (relstart);
8939 }
8940
8941 if (locsyms != NULL
8942 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8943 {
8944 if (!info->keep_memory)
8945 free (locsyms);
8946 else
8947 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8948 }
8949 }
8950
8951 if (toc_ref != NULL)
8952 free (toc_ref);
8953 htab->do_tls_opt = 1;
8954 return TRUE;
8955 }
8956
8957 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8958 the values of any global symbols in a toc section that has been
8959 edited. Globals in toc sections should be a rarity, so this function
8960 sets a flag if any are found in toc sections other than the one just
8961 edited, so that further hash table traversals can be avoided. */
8962
8963 struct adjust_toc_info
8964 {
8965 asection *toc;
8966 unsigned long *skip;
8967 bfd_boolean global_toc_syms;
8968 };
8969
8970 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8971
8972 static bfd_boolean
8973 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8974 {
8975 struct ppc_link_hash_entry *eh;
8976 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8977 unsigned long i;
8978
8979 if (h->root.type != bfd_link_hash_defined
8980 && h->root.type != bfd_link_hash_defweak)
8981 return TRUE;
8982
8983 eh = (struct ppc_link_hash_entry *) h;
8984 if (eh->adjust_done)
8985 return TRUE;
8986
8987 if (eh->elf.root.u.def.section == toc_inf->toc)
8988 {
8989 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8990 i = toc_inf->toc->rawsize >> 3;
8991 else
8992 i = eh->elf.root.u.def.value >> 3;
8993
8994 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8995 {
8996 _bfd_error_handler
8997 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8998 do
8999 ++i;
9000 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
9001 eh->elf.root.u.def.value = (bfd_vma) i << 3;
9002 }
9003
9004 eh->elf.root.u.def.value -= toc_inf->skip[i];
9005 eh->adjust_done = 1;
9006 }
9007 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
9008 toc_inf->global_toc_syms = TRUE;
9009
9010 return TRUE;
9011 }
9012
9013 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
9014 on a _LO variety toc/got reloc. */
9015
9016 static bfd_boolean
9017 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
9018 {
9019 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
9020 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
9021 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
9022 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
9023 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
9024 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
9025 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
9026 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
9027 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
9028 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
9029 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
9030 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
9031 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
9032 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
9033 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
9034 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
9035 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
9036 /* Exclude lfqu by testing reloc. If relocs are ever
9037 defined for the reduced D field in psq_lu then those
9038 will need testing too. */
9039 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9040 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
9041 && (insn & 1) == 0)
9042 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
9043 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
9044 /* Exclude stfqu. psq_stu as above for psq_lu. */
9045 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9046 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
9047 && (insn & 1) == 0));
9048 }
9049
9050 /* Examine all relocs referencing .toc sections in order to remove
9051 unused .toc entries. */
9052
9053 bfd_boolean
9054 ppc64_elf_edit_toc (struct bfd_link_info *info)
9055 {
9056 bfd *ibfd;
9057 struct adjust_toc_info toc_inf;
9058 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9059
9060 htab->do_toc_opt = 1;
9061 toc_inf.global_toc_syms = TRUE;
9062 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9063 {
9064 asection *toc, *sec;
9065 Elf_Internal_Shdr *symtab_hdr;
9066 Elf_Internal_Sym *local_syms;
9067 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9068 unsigned long *skip, *drop;
9069 unsigned char *used;
9070 unsigned char *keep, last, some_unused;
9071
9072 if (!is_ppc64_elf (ibfd))
9073 continue;
9074
9075 toc = bfd_get_section_by_name (ibfd, ".toc");
9076 if (toc == NULL
9077 || toc->size == 0
9078 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9079 || discarded_section (toc))
9080 continue;
9081
9082 toc_relocs = NULL;
9083 local_syms = NULL;
9084 symtab_hdr = &elf_symtab_hdr (ibfd);
9085
9086 /* Look at sections dropped from the final link. */
9087 skip = NULL;
9088 relstart = NULL;
9089 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9090 {
9091 if (sec->reloc_count == 0
9092 || !discarded_section (sec)
9093 || get_opd_info (sec)
9094 || (sec->flags & SEC_ALLOC) == 0
9095 || (sec->flags & SEC_DEBUGGING) != 0)
9096 continue;
9097
9098 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9099 if (relstart == NULL)
9100 goto error_ret;
9101
9102 /* Run through the relocs to see which toc entries might be
9103 unused. */
9104 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9105 {
9106 enum elf_ppc64_reloc_type r_type;
9107 unsigned long r_symndx;
9108 asection *sym_sec;
9109 struct elf_link_hash_entry *h;
9110 Elf_Internal_Sym *sym;
9111 bfd_vma val;
9112
9113 r_type = ELF64_R_TYPE (rel->r_info);
9114 switch (r_type)
9115 {
9116 default:
9117 continue;
9118
9119 case R_PPC64_TOC16:
9120 case R_PPC64_TOC16_LO:
9121 case R_PPC64_TOC16_HI:
9122 case R_PPC64_TOC16_HA:
9123 case R_PPC64_TOC16_DS:
9124 case R_PPC64_TOC16_LO_DS:
9125 break;
9126 }
9127
9128 r_symndx = ELF64_R_SYM (rel->r_info);
9129 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9130 r_symndx, ibfd))
9131 goto error_ret;
9132
9133 if (sym_sec != toc)
9134 continue;
9135
9136 if (h != NULL)
9137 val = h->root.u.def.value;
9138 else
9139 val = sym->st_value;
9140 val += rel->r_addend;
9141
9142 if (val >= toc->size)
9143 continue;
9144
9145 /* Anything in the toc ought to be aligned to 8 bytes.
9146 If not, don't mark as unused. */
9147 if (val & 7)
9148 continue;
9149
9150 if (skip == NULL)
9151 {
9152 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9153 if (skip == NULL)
9154 goto error_ret;
9155 }
9156
9157 skip[val >> 3] = ref_from_discarded;
9158 }
9159
9160 if (elf_section_data (sec)->relocs != relstart)
9161 free (relstart);
9162 }
9163
9164 /* For largetoc loads of address constants, we can convert
9165 . addis rx,2,addr@got@ha
9166 . ld ry,addr@got@l(rx)
9167 to
9168 . addis rx,2,addr@toc@ha
9169 . addi ry,rx,addr@toc@l
9170 when addr is within 2G of the toc pointer. This then means
9171 that the word storing "addr" in the toc is no longer needed. */
9172
9173 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9174 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9175 && toc->reloc_count != 0)
9176 {
9177 /* Read toc relocs. */
9178 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9179 info->keep_memory);
9180 if (toc_relocs == NULL)
9181 goto error_ret;
9182
9183 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9184 {
9185 enum elf_ppc64_reloc_type r_type;
9186 unsigned long r_symndx;
9187 asection *sym_sec;
9188 struct elf_link_hash_entry *h;
9189 Elf_Internal_Sym *sym;
9190 bfd_vma val, addr;
9191
9192 r_type = ELF64_R_TYPE (rel->r_info);
9193 if (r_type != R_PPC64_ADDR64)
9194 continue;
9195
9196 r_symndx = ELF64_R_SYM (rel->r_info);
9197 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9198 r_symndx, ibfd))
9199 goto error_ret;
9200
9201 if (sym_sec == NULL
9202 || sym_sec->output_section == NULL
9203 || discarded_section (sym_sec))
9204 continue;
9205
9206 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9207 continue;
9208
9209 if (h != NULL)
9210 {
9211 if (h->type == STT_GNU_IFUNC)
9212 continue;
9213 val = h->root.u.def.value;
9214 }
9215 else
9216 {
9217 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9218 continue;
9219 val = sym->st_value;
9220 }
9221 val += rel->r_addend;
9222 val += sym_sec->output_section->vma + sym_sec->output_offset;
9223
9224 /* We don't yet know the exact toc pointer value, but we
9225 know it will be somewhere in the toc section. Don't
9226 optimize if the difference from any possible toc
9227 pointer is outside [ff..f80008000, 7fff7fff]. */
9228 addr = toc->output_section->vma + TOC_BASE_OFF;
9229 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9230 continue;
9231
9232 addr = toc->output_section->vma + toc->output_section->rawsize;
9233 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9234 continue;
9235
9236 if (skip == NULL)
9237 {
9238 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9239 if (skip == NULL)
9240 goto error_ret;
9241 }
9242
9243 skip[rel->r_offset >> 3]
9244 |= can_optimize | ((rel - toc_relocs) << 2);
9245 }
9246 }
9247
9248 if (skip == NULL)
9249 continue;
9250
9251 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9252 if (used == NULL)
9253 {
9254 error_ret:
9255 if (local_syms != NULL
9256 && symtab_hdr->contents != (unsigned char *) local_syms)
9257 free (local_syms);
9258 if (sec != NULL
9259 && relstart != NULL
9260 && elf_section_data (sec)->relocs != relstart)
9261 free (relstart);
9262 if (toc_relocs != NULL
9263 && elf_section_data (toc)->relocs != toc_relocs)
9264 free (toc_relocs);
9265 if (skip != NULL)
9266 free (skip);
9267 return FALSE;
9268 }
9269
9270 /* Now check all kept sections that might reference the toc.
9271 Check the toc itself last. */
9272 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9273 : ibfd->sections);
9274 sec != NULL;
9275 sec = (sec == toc ? NULL
9276 : sec->next == NULL ? toc
9277 : sec->next == toc && toc->next ? toc->next
9278 : sec->next))
9279 {
9280 int repeat;
9281
9282 if (sec->reloc_count == 0
9283 || discarded_section (sec)
9284 || get_opd_info (sec)
9285 || (sec->flags & SEC_ALLOC) == 0
9286 || (sec->flags & SEC_DEBUGGING) != 0)
9287 continue;
9288
9289 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9290 info->keep_memory);
9291 if (relstart == NULL)
9292 {
9293 free (used);
9294 goto error_ret;
9295 }
9296
9297 /* Mark toc entries referenced as used. */
9298 do
9299 {
9300 repeat = 0;
9301 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9302 {
9303 enum elf_ppc64_reloc_type r_type;
9304 unsigned long r_symndx;
9305 asection *sym_sec;
9306 struct elf_link_hash_entry *h;
9307 Elf_Internal_Sym *sym;
9308 bfd_vma val;
9309 enum {no_check, check_lo, check_ha} insn_check;
9310
9311 r_type = ELF64_R_TYPE (rel->r_info);
9312 switch (r_type)
9313 {
9314 default:
9315 insn_check = no_check;
9316 break;
9317
9318 case R_PPC64_GOT_TLSLD16_HA:
9319 case R_PPC64_GOT_TLSGD16_HA:
9320 case R_PPC64_GOT_TPREL16_HA:
9321 case R_PPC64_GOT_DTPREL16_HA:
9322 case R_PPC64_GOT16_HA:
9323 case R_PPC64_TOC16_HA:
9324 insn_check = check_ha;
9325 break;
9326
9327 case R_PPC64_GOT_TLSLD16_LO:
9328 case R_PPC64_GOT_TLSGD16_LO:
9329 case R_PPC64_GOT_TPREL16_LO_DS:
9330 case R_PPC64_GOT_DTPREL16_LO_DS:
9331 case R_PPC64_GOT16_LO:
9332 case R_PPC64_GOT16_LO_DS:
9333 case R_PPC64_TOC16_LO:
9334 case R_PPC64_TOC16_LO_DS:
9335 insn_check = check_lo;
9336 break;
9337 }
9338
9339 if (insn_check != no_check)
9340 {
9341 bfd_vma off = rel->r_offset & ~3;
9342 unsigned char buf[4];
9343 unsigned int insn;
9344
9345 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9346 {
9347 free (used);
9348 goto error_ret;
9349 }
9350 insn = bfd_get_32 (ibfd, buf);
9351 if (insn_check == check_lo
9352 ? !ok_lo_toc_insn (insn, r_type)
9353 : ((insn & ((0x3f << 26) | 0x1f << 16))
9354 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9355 {
9356 char str[12];
9357
9358 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9359 sprintf (str, "%#08x", insn);
9360 info->callbacks->einfo
9361 /* xgettext:c-format */
9362 (_("%H: toc optimization is not supported for"
9363 " %s instruction.\n"),
9364 ibfd, sec, rel->r_offset & ~3, str);
9365 }
9366 }
9367
9368 switch (r_type)
9369 {
9370 case R_PPC64_TOC16:
9371 case R_PPC64_TOC16_LO:
9372 case R_PPC64_TOC16_HI:
9373 case R_PPC64_TOC16_HA:
9374 case R_PPC64_TOC16_DS:
9375 case R_PPC64_TOC16_LO_DS:
9376 /* In case we're taking addresses of toc entries. */
9377 case R_PPC64_ADDR64:
9378 break;
9379
9380 default:
9381 continue;
9382 }
9383
9384 r_symndx = ELF64_R_SYM (rel->r_info);
9385 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9386 r_symndx, ibfd))
9387 {
9388 free (used);
9389 goto error_ret;
9390 }
9391
9392 if (sym_sec != toc)
9393 continue;
9394
9395 if (h != NULL)
9396 val = h->root.u.def.value;
9397 else
9398 val = sym->st_value;
9399 val += rel->r_addend;
9400
9401 if (val >= toc->size)
9402 continue;
9403
9404 if ((skip[val >> 3] & can_optimize) != 0)
9405 {
9406 bfd_vma off;
9407 unsigned char opc;
9408
9409 switch (r_type)
9410 {
9411 case R_PPC64_TOC16_HA:
9412 break;
9413
9414 case R_PPC64_TOC16_LO_DS:
9415 off = rel->r_offset;
9416 off += (bfd_big_endian (ibfd) ? -2 : 3);
9417 if (!bfd_get_section_contents (ibfd, sec, &opc,
9418 off, 1))
9419 {
9420 free (used);
9421 goto error_ret;
9422 }
9423 if ((opc & (0x3f << 2)) == (58u << 2))
9424 break;
9425 /* Fall through. */
9426
9427 default:
9428 /* Wrong sort of reloc, or not a ld. We may
9429 as well clear ref_from_discarded too. */
9430 skip[val >> 3] = 0;
9431 }
9432 }
9433
9434 if (sec != toc)
9435 used[val >> 3] = 1;
9436 /* For the toc section, we only mark as used if this
9437 entry itself isn't unused. */
9438 else if ((used[rel->r_offset >> 3]
9439 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9440 && !used[val >> 3])
9441 {
9442 /* Do all the relocs again, to catch reference
9443 chains. */
9444 repeat = 1;
9445 used[val >> 3] = 1;
9446 }
9447 }
9448 }
9449 while (repeat);
9450
9451 if (elf_section_data (sec)->relocs != relstart)
9452 free (relstart);
9453 }
9454
9455 /* Merge the used and skip arrays. Assume that TOC
9456 doublewords not appearing as either used or unused belong
9457 to an entry more than one doubleword in size. */
9458 for (drop = skip, keep = used, last = 0, some_unused = 0;
9459 drop < skip + (toc->size + 7) / 8;
9460 ++drop, ++keep)
9461 {
9462 if (*keep)
9463 {
9464 *drop &= ~ref_from_discarded;
9465 if ((*drop & can_optimize) != 0)
9466 some_unused = 1;
9467 last = 0;
9468 }
9469 else if ((*drop & ref_from_discarded) != 0)
9470 {
9471 some_unused = 1;
9472 last = ref_from_discarded;
9473 }
9474 else
9475 *drop = last;
9476 }
9477
9478 free (used);
9479
9480 if (some_unused)
9481 {
9482 bfd_byte *contents, *src;
9483 unsigned long off;
9484 Elf_Internal_Sym *sym;
9485 bfd_boolean local_toc_syms = FALSE;
9486
9487 /* Shuffle the toc contents, and at the same time convert the
9488 skip array from booleans into offsets. */
9489 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9490 goto error_ret;
9491
9492 elf_section_data (toc)->this_hdr.contents = contents;
9493
9494 for (src = contents, off = 0, drop = skip;
9495 src < contents + toc->size;
9496 src += 8, ++drop)
9497 {
9498 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9499 off += 8;
9500 else if (off != 0)
9501 {
9502 *drop = off;
9503 memcpy (src - off, src, 8);
9504 }
9505 }
9506 *drop = off;
9507 toc->rawsize = toc->size;
9508 toc->size = src - contents - off;
9509
9510 /* Adjust addends for relocs against the toc section sym,
9511 and optimize any accesses we can. */
9512 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9513 {
9514 if (sec->reloc_count == 0
9515 || discarded_section (sec))
9516 continue;
9517
9518 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9519 info->keep_memory);
9520 if (relstart == NULL)
9521 goto error_ret;
9522
9523 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9524 {
9525 enum elf_ppc64_reloc_type r_type;
9526 unsigned long r_symndx;
9527 asection *sym_sec;
9528 struct elf_link_hash_entry *h;
9529 bfd_vma val;
9530
9531 r_type = ELF64_R_TYPE (rel->r_info);
9532 switch (r_type)
9533 {
9534 default:
9535 continue;
9536
9537 case R_PPC64_TOC16:
9538 case R_PPC64_TOC16_LO:
9539 case R_PPC64_TOC16_HI:
9540 case R_PPC64_TOC16_HA:
9541 case R_PPC64_TOC16_DS:
9542 case R_PPC64_TOC16_LO_DS:
9543 case R_PPC64_ADDR64:
9544 break;
9545 }
9546
9547 r_symndx = ELF64_R_SYM (rel->r_info);
9548 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9549 r_symndx, ibfd))
9550 goto error_ret;
9551
9552 if (sym_sec != toc)
9553 continue;
9554
9555 if (h != NULL)
9556 val = h->root.u.def.value;
9557 else
9558 {
9559 val = sym->st_value;
9560 if (val != 0)
9561 local_toc_syms = TRUE;
9562 }
9563
9564 val += rel->r_addend;
9565
9566 if (val > toc->rawsize)
9567 val = toc->rawsize;
9568 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9569 continue;
9570 else if ((skip[val >> 3] & can_optimize) != 0)
9571 {
9572 Elf_Internal_Rela *tocrel
9573 = toc_relocs + (skip[val >> 3] >> 2);
9574 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9575
9576 switch (r_type)
9577 {
9578 case R_PPC64_TOC16_HA:
9579 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9580 break;
9581
9582 case R_PPC64_TOC16_LO_DS:
9583 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9584 break;
9585
9586 default:
9587 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9588 ppc_howto_init ();
9589 info->callbacks->einfo
9590 /* xgettext:c-format */
9591 (_("%H: %s references "
9592 "optimized away TOC entry\n"),
9593 ibfd, sec, rel->r_offset,
9594 ppc64_elf_howto_table[r_type]->name);
9595 bfd_set_error (bfd_error_bad_value);
9596 goto error_ret;
9597 }
9598 rel->r_addend = tocrel->r_addend;
9599 elf_section_data (sec)->relocs = relstart;
9600 continue;
9601 }
9602
9603 if (h != NULL || sym->st_value != 0)
9604 continue;
9605
9606 rel->r_addend -= skip[val >> 3];
9607 elf_section_data (sec)->relocs = relstart;
9608 }
9609
9610 if (elf_section_data (sec)->relocs != relstart)
9611 free (relstart);
9612 }
9613
9614 /* We shouldn't have local or global symbols defined in the TOC,
9615 but handle them anyway. */
9616 if (local_syms != NULL)
9617 for (sym = local_syms;
9618 sym < local_syms + symtab_hdr->sh_info;
9619 ++sym)
9620 if (sym->st_value != 0
9621 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9622 {
9623 unsigned long i;
9624
9625 if (sym->st_value > toc->rawsize)
9626 i = toc->rawsize >> 3;
9627 else
9628 i = sym->st_value >> 3;
9629
9630 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9631 {
9632 if (local_toc_syms)
9633 _bfd_error_handler
9634 (_("%s defined on removed toc entry"),
9635 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9636 do
9637 ++i;
9638 while ((skip[i] & (ref_from_discarded | can_optimize)));
9639 sym->st_value = (bfd_vma) i << 3;
9640 }
9641
9642 sym->st_value -= skip[i];
9643 symtab_hdr->contents = (unsigned char *) local_syms;
9644 }
9645
9646 /* Adjust any global syms defined in this toc input section. */
9647 if (toc_inf.global_toc_syms)
9648 {
9649 toc_inf.toc = toc;
9650 toc_inf.skip = skip;
9651 toc_inf.global_toc_syms = FALSE;
9652 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9653 &toc_inf);
9654 }
9655
9656 if (toc->reloc_count != 0)
9657 {
9658 Elf_Internal_Shdr *rel_hdr;
9659 Elf_Internal_Rela *wrel;
9660 bfd_size_type sz;
9661
9662 /* Remove unused toc relocs, and adjust those we keep. */
9663 if (toc_relocs == NULL)
9664 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9665 info->keep_memory);
9666 if (toc_relocs == NULL)
9667 goto error_ret;
9668
9669 wrel = toc_relocs;
9670 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9671 if ((skip[rel->r_offset >> 3]
9672 & (ref_from_discarded | can_optimize)) == 0)
9673 {
9674 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9675 wrel->r_info = rel->r_info;
9676 wrel->r_addend = rel->r_addend;
9677 ++wrel;
9678 }
9679 else if (!dec_dynrel_count (rel->r_info, toc, info,
9680 &local_syms, NULL, NULL))
9681 goto error_ret;
9682
9683 elf_section_data (toc)->relocs = toc_relocs;
9684 toc->reloc_count = wrel - toc_relocs;
9685 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9686 sz = rel_hdr->sh_entsize;
9687 rel_hdr->sh_size = toc->reloc_count * sz;
9688 }
9689 }
9690 else if (toc_relocs != NULL
9691 && elf_section_data (toc)->relocs != toc_relocs)
9692 free (toc_relocs);
9693
9694 if (local_syms != NULL
9695 && symtab_hdr->contents != (unsigned char *) local_syms)
9696 {
9697 if (!info->keep_memory)
9698 free (local_syms);
9699 else
9700 symtab_hdr->contents = (unsigned char *) local_syms;
9701 }
9702 free (skip);
9703 }
9704
9705 return TRUE;
9706 }
9707
9708 /* Return true iff input section I references the TOC using
9709 instructions limited to +/-32k offsets. */
9710
9711 bfd_boolean
9712 ppc64_elf_has_small_toc_reloc (asection *i)
9713 {
9714 return (is_ppc64_elf (i->owner)
9715 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9716 }
9717
9718 /* Allocate space for one GOT entry. */
9719
9720 static void
9721 allocate_got (struct elf_link_hash_entry *h,
9722 struct bfd_link_info *info,
9723 struct got_entry *gent)
9724 {
9725 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9726 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9727 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9728 ? 16 : 8);
9729 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9730 ? 2 : 1) * sizeof (Elf64_External_Rela);
9731 asection *got = ppc64_elf_tdata (gent->owner)->got;
9732
9733 gent->got.offset = got->size;
9734 got->size += entsize;
9735
9736 if (h->type == STT_GNU_IFUNC)
9737 {
9738 htab->elf.irelplt->size += rentsize;
9739 htab->got_reli_size += rentsize;
9740 }
9741 else if ((bfd_link_pic (info)
9742 || (htab->elf.dynamic_sections_created
9743 && h->dynindx != -1
9744 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9745 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9746 {
9747 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9748 relgot->size += rentsize;
9749 }
9750 }
9751
9752 /* This function merges got entries in the same toc group. */
9753
9754 static void
9755 merge_got_entries (struct got_entry **pent)
9756 {
9757 struct got_entry *ent, *ent2;
9758
9759 for (ent = *pent; ent != NULL; ent = ent->next)
9760 if (!ent->is_indirect)
9761 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9762 if (!ent2->is_indirect
9763 && ent2->addend == ent->addend
9764 && ent2->tls_type == ent->tls_type
9765 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9766 {
9767 ent2->is_indirect = TRUE;
9768 ent2->got.ent = ent;
9769 }
9770 }
9771
9772 /* If H is undefined, make it dynamic if that makes sense. */
9773
9774 static bfd_boolean
9775 ensure_undef_dynamic (struct bfd_link_info *info,
9776 struct elf_link_hash_entry *h)
9777 {
9778 struct elf_link_hash_table *htab = elf_hash_table (info);
9779
9780 if (htab->dynamic_sections_created
9781 && ((info->dynamic_undefined_weak != 0
9782 && h->root.type == bfd_link_hash_undefweak)
9783 || h->root.type == bfd_link_hash_undefined)
9784 && h->dynindx == -1
9785 && !h->forced_local
9786 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9787 return bfd_elf_link_record_dynamic_symbol (info, h);
9788 return TRUE;
9789 }
9790
9791 /* Allocate space in .plt, .got and associated reloc sections for
9792 dynamic relocs. */
9793
9794 static bfd_boolean
9795 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9796 {
9797 struct bfd_link_info *info;
9798 struct ppc_link_hash_table *htab;
9799 asection *s;
9800 struct ppc_link_hash_entry *eh;
9801 struct got_entry **pgent, *gent;
9802
9803 if (h->root.type == bfd_link_hash_indirect)
9804 return TRUE;
9805
9806 info = (struct bfd_link_info *) inf;
9807 htab = ppc_hash_table (info);
9808 if (htab == NULL)
9809 return FALSE;
9810
9811 eh = (struct ppc_link_hash_entry *) h;
9812 /* Run through the TLS GD got entries first if we're changing them
9813 to TPREL. */
9814 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9815 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9816 if (gent->got.refcount > 0
9817 && (gent->tls_type & TLS_GD) != 0)
9818 {
9819 /* This was a GD entry that has been converted to TPREL. If
9820 there happens to be a TPREL entry we can use that one. */
9821 struct got_entry *ent;
9822 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9823 if (ent->got.refcount > 0
9824 && (ent->tls_type & TLS_TPREL) != 0
9825 && ent->addend == gent->addend
9826 && ent->owner == gent->owner)
9827 {
9828 gent->got.refcount = 0;
9829 break;
9830 }
9831
9832 /* If not, then we'll be using our own TPREL entry. */
9833 if (gent->got.refcount != 0)
9834 gent->tls_type = TLS_TLS | TLS_TPREL;
9835 }
9836
9837 /* Remove any list entry that won't generate a word in the GOT before
9838 we call merge_got_entries. Otherwise we risk merging to empty
9839 entries. */
9840 pgent = &h->got.glist;
9841 while ((gent = *pgent) != NULL)
9842 if (gent->got.refcount > 0)
9843 {
9844 if ((gent->tls_type & TLS_LD) != 0
9845 && !h->def_dynamic)
9846 {
9847 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9848 *pgent = gent->next;
9849 }
9850 else
9851 pgent = &gent->next;
9852 }
9853 else
9854 *pgent = gent->next;
9855
9856 if (!htab->do_multi_toc)
9857 merge_got_entries (&h->got.glist);
9858
9859 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9860 if (!gent->is_indirect)
9861 {
9862 /* Make sure this symbol is output as a dynamic symbol. */
9863 if (!ensure_undef_dynamic (info, h))
9864 return FALSE;
9865
9866 if (!is_ppc64_elf (gent->owner))
9867 abort ();
9868
9869 allocate_got (h, info, gent);
9870 }
9871
9872 /* If no dynamic sections we can't have dynamic relocs, except for
9873 IFUNCs which are handled even in static executables. */
9874 if (!htab->elf.dynamic_sections_created
9875 && h->type != STT_GNU_IFUNC)
9876 eh->dyn_relocs = NULL;
9877
9878 /* Also discard relocs on undefined weak syms with non-default
9879 visibility, or when dynamic_undefined_weak says so. */
9880 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9881 eh->dyn_relocs = NULL;
9882
9883 if (eh->dyn_relocs != NULL)
9884 {
9885 struct elf_dyn_relocs *p, **pp;
9886
9887 /* In the shared -Bsymbolic case, discard space allocated for
9888 dynamic pc-relative relocs against symbols which turn out to
9889 be defined in regular objects. For the normal shared case,
9890 discard space for relocs that have become local due to symbol
9891 visibility changes. */
9892
9893 if (bfd_link_pic (info))
9894 {
9895 /* Relocs that use pc_count are those that appear on a call
9896 insn, or certain REL relocs (see must_be_dyn_reloc) that
9897 can be generated via assembly. We want calls to
9898 protected symbols to resolve directly to the function
9899 rather than going via the plt. If people want function
9900 pointer comparisons to work as expected then they should
9901 avoid writing weird assembly. */
9902 if (SYMBOL_CALLS_LOCAL (info, h))
9903 {
9904 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9905 {
9906 p->count -= p->pc_count;
9907 p->pc_count = 0;
9908 if (p->count == 0)
9909 *pp = p->next;
9910 else
9911 pp = &p->next;
9912 }
9913 }
9914
9915 if (eh->dyn_relocs != NULL)
9916 {
9917 /* Make sure this symbol is output as a dynamic symbol. */
9918 if (!ensure_undef_dynamic (info, h))
9919 return FALSE;
9920 }
9921 }
9922 else if (h->type == STT_GNU_IFUNC)
9923 {
9924 /* A plt entry is always created when making direct calls to
9925 an ifunc, even when building a static executable, but
9926 that doesn't cover all cases. We may have only an ifunc
9927 initialised function pointer for a given ifunc symbol.
9928
9929 For ELFv2, dynamic relocations are not required when
9930 generating a global entry PLT stub. */
9931 if (abiversion (info->output_bfd) >= 2)
9932 {
9933 if (global_entry_stub (h))
9934 eh->dyn_relocs = NULL;
9935 }
9936
9937 /* For ELFv1 we have function descriptors. Descriptors need
9938 to be treated like PLT entries and thus have dynamic
9939 relocations. One exception is when the function
9940 descriptor is copied into .dynbss (which should only
9941 happen with ancient versions of gcc). */
9942 else if (h->needs_copy)
9943 eh->dyn_relocs = NULL;
9944 }
9945 else if (ELIMINATE_COPY_RELOCS)
9946 {
9947 /* For the non-pic case, discard space for relocs against
9948 symbols which turn out to need copy relocs or are not
9949 dynamic. */
9950 if (!h->non_got_ref
9951 && !h->def_regular)
9952 {
9953 /* Make sure this symbol is output as a dynamic symbol. */
9954 if (!ensure_undef_dynamic (info, h))
9955 return FALSE;
9956
9957 if (h->dynindx == -1)
9958 eh->dyn_relocs = NULL;
9959 }
9960 else
9961 eh->dyn_relocs = NULL;
9962 }
9963
9964 /* Finally, allocate space. */
9965 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9966 {
9967 asection *sreloc = elf_section_data (p->sec)->sreloc;
9968 if (eh->elf.type == STT_GNU_IFUNC)
9969 sreloc = htab->elf.irelplt;
9970 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9971 }
9972 }
9973
9974 if ((htab->elf.dynamic_sections_created
9975 && h->dynindx != -1)
9976 || h->type == STT_GNU_IFUNC)
9977 {
9978 struct plt_entry *pent;
9979 bfd_boolean doneone = FALSE;
9980 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9981 if (pent->plt.refcount > 0)
9982 {
9983 if (!htab->elf.dynamic_sections_created
9984 || h->dynindx == -1)
9985 {
9986 s = htab->elf.iplt;
9987 pent->plt.offset = s->size;
9988 s->size += PLT_ENTRY_SIZE (htab);
9989 s = htab->elf.irelplt;
9990 }
9991 else
9992 {
9993 /* If this is the first .plt entry, make room for the special
9994 first entry. */
9995 s = htab->elf.splt;
9996 if (s->size == 0)
9997 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9998
9999 pent->plt.offset = s->size;
10000
10001 /* Make room for this entry. */
10002 s->size += PLT_ENTRY_SIZE (htab);
10003
10004 /* Make room for the .glink code. */
10005 s = htab->glink;
10006 if (s->size == 0)
10007 s->size += GLINK_CALL_STUB_SIZE;
10008 if (htab->opd_abi)
10009 {
10010 /* We need bigger stubs past index 32767. */
10011 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
10012 s->size += 4;
10013 s->size += 2*4;
10014 }
10015 else
10016 s->size += 4;
10017
10018 /* We also need to make an entry in the .rela.plt section. */
10019 s = htab->elf.srelplt;
10020 }
10021 s->size += sizeof (Elf64_External_Rela);
10022 doneone = TRUE;
10023 }
10024 else
10025 pent->plt.offset = (bfd_vma) -1;
10026 if (!doneone)
10027 {
10028 h->plt.plist = NULL;
10029 h->needs_plt = 0;
10030 }
10031 }
10032 else
10033 {
10034 h->plt.plist = NULL;
10035 h->needs_plt = 0;
10036 }
10037
10038 return TRUE;
10039 }
10040
10041 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
10042 to set up space for global entry stubs. These are put in glink,
10043 after the branch table. */
10044
10045 static bfd_boolean
10046 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
10047 {
10048 struct bfd_link_info *info;
10049 struct ppc_link_hash_table *htab;
10050 struct plt_entry *pent;
10051 asection *s;
10052
10053 if (h->root.type == bfd_link_hash_indirect)
10054 return TRUE;
10055
10056 if (!h->pointer_equality_needed)
10057 return TRUE;
10058
10059 if (h->def_regular)
10060 return TRUE;
10061
10062 info = inf;
10063 htab = ppc_hash_table (info);
10064 if (htab == NULL)
10065 return FALSE;
10066
10067 s = htab->glink;
10068 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10069 if (pent->plt.offset != (bfd_vma) -1
10070 && pent->addend == 0)
10071 {
10072 /* For ELFv2, if this symbol is not defined in a regular file
10073 and we are not generating a shared library or pie, then we
10074 need to define the symbol in the executable on a call stub.
10075 This is to avoid text relocations. */
10076 s->size = (s->size + 15) & -16;
10077 h->root.type = bfd_link_hash_defined;
10078 h->root.u.def.section = s;
10079 h->root.u.def.value = s->size;
10080 s->size += 16;
10081 break;
10082 }
10083 return TRUE;
10084 }
10085
10086 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10087 read-only sections. */
10088
10089 static bfd_boolean
10090 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10091 {
10092 if (h->root.type == bfd_link_hash_indirect)
10093 return TRUE;
10094
10095 if (readonly_dynrelocs (h))
10096 {
10097 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10098
10099 /* Not an error, just cut short the traversal. */
10100 return FALSE;
10101 }
10102 return TRUE;
10103 }
10104
10105 /* Set the sizes of the dynamic sections. */
10106
10107 static bfd_boolean
10108 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10109 struct bfd_link_info *info)
10110 {
10111 struct ppc_link_hash_table *htab;
10112 bfd *dynobj;
10113 asection *s;
10114 bfd_boolean relocs;
10115 bfd *ibfd;
10116 struct got_entry *first_tlsld;
10117
10118 htab = ppc_hash_table (info);
10119 if (htab == NULL)
10120 return FALSE;
10121
10122 dynobj = htab->elf.dynobj;
10123 if (dynobj == NULL)
10124 abort ();
10125
10126 if (htab->elf.dynamic_sections_created)
10127 {
10128 /* Set the contents of the .interp section to the interpreter. */
10129 if (bfd_link_executable (info) && !info->nointerp)
10130 {
10131 s = bfd_get_linker_section (dynobj, ".interp");
10132 if (s == NULL)
10133 abort ();
10134 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10135 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10136 }
10137 }
10138
10139 /* Set up .got offsets for local syms, and space for local dynamic
10140 relocs. */
10141 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10142 {
10143 struct got_entry **lgot_ents;
10144 struct got_entry **end_lgot_ents;
10145 struct plt_entry **local_plt;
10146 struct plt_entry **end_local_plt;
10147 unsigned char *lgot_masks;
10148 bfd_size_type locsymcount;
10149 Elf_Internal_Shdr *symtab_hdr;
10150
10151 if (!is_ppc64_elf (ibfd))
10152 continue;
10153
10154 for (s = ibfd->sections; s != NULL; s = s->next)
10155 {
10156 struct ppc_dyn_relocs *p;
10157
10158 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10159 {
10160 if (!bfd_is_abs_section (p->sec)
10161 && bfd_is_abs_section (p->sec->output_section))
10162 {
10163 /* Input section has been discarded, either because
10164 it is a copy of a linkonce section or due to
10165 linker script /DISCARD/, so we'll be discarding
10166 the relocs too. */
10167 }
10168 else if (p->count != 0)
10169 {
10170 asection *srel = elf_section_data (p->sec)->sreloc;
10171 if (p->ifunc)
10172 srel = htab->elf.irelplt;
10173 srel->size += p->count * sizeof (Elf64_External_Rela);
10174 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10175 info->flags |= DF_TEXTREL;
10176 }
10177 }
10178 }
10179
10180 lgot_ents = elf_local_got_ents (ibfd);
10181 if (!lgot_ents)
10182 continue;
10183
10184 symtab_hdr = &elf_symtab_hdr (ibfd);
10185 locsymcount = symtab_hdr->sh_info;
10186 end_lgot_ents = lgot_ents + locsymcount;
10187 local_plt = (struct plt_entry **) end_lgot_ents;
10188 end_local_plt = local_plt + locsymcount;
10189 lgot_masks = (unsigned char *) end_local_plt;
10190 s = ppc64_elf_tdata (ibfd)->got;
10191 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10192 {
10193 struct got_entry **pent, *ent;
10194
10195 pent = lgot_ents;
10196 while ((ent = *pent) != NULL)
10197 if (ent->got.refcount > 0)
10198 {
10199 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10200 {
10201 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10202 *pent = ent->next;
10203 }
10204 else
10205 {
10206 unsigned int ent_size = 8;
10207 unsigned int rel_size = sizeof (Elf64_External_Rela);
10208
10209 ent->got.offset = s->size;
10210 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10211 {
10212 ent_size *= 2;
10213 rel_size *= 2;
10214 }
10215 s->size += ent_size;
10216 if ((*lgot_masks & PLT_IFUNC) != 0)
10217 {
10218 htab->elf.irelplt->size += rel_size;
10219 htab->got_reli_size += rel_size;
10220 }
10221 else if (bfd_link_pic (info))
10222 {
10223 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10224 srel->size += rel_size;
10225 }
10226 pent = &ent->next;
10227 }
10228 }
10229 else
10230 *pent = ent->next;
10231 }
10232
10233 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10234 for (; local_plt < end_local_plt; ++local_plt)
10235 {
10236 struct plt_entry *ent;
10237
10238 for (ent = *local_plt; ent != NULL; ent = ent->next)
10239 if (ent->plt.refcount > 0)
10240 {
10241 s = htab->elf.iplt;
10242 ent->plt.offset = s->size;
10243 s->size += PLT_ENTRY_SIZE (htab);
10244
10245 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10246 }
10247 else
10248 ent->plt.offset = (bfd_vma) -1;
10249 }
10250 }
10251
10252 /* Allocate global sym .plt and .got entries, and space for global
10253 sym dynamic relocs. */
10254 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10255 /* Stash the end of glink branch table. */
10256 if (htab->glink != NULL)
10257 htab->glink->rawsize = htab->glink->size;
10258
10259 if (!htab->opd_abi && !bfd_link_pic (info))
10260 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10261
10262 first_tlsld = NULL;
10263 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10264 {
10265 struct got_entry *ent;
10266
10267 if (!is_ppc64_elf (ibfd))
10268 continue;
10269
10270 ent = ppc64_tlsld_got (ibfd);
10271 if (ent->got.refcount > 0)
10272 {
10273 if (!htab->do_multi_toc && first_tlsld != NULL)
10274 {
10275 ent->is_indirect = TRUE;
10276 ent->got.ent = first_tlsld;
10277 }
10278 else
10279 {
10280 if (first_tlsld == NULL)
10281 first_tlsld = ent;
10282 s = ppc64_elf_tdata (ibfd)->got;
10283 ent->got.offset = s->size;
10284 ent->owner = ibfd;
10285 s->size += 16;
10286 if (bfd_link_pic (info))
10287 {
10288 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10289 srel->size += sizeof (Elf64_External_Rela);
10290 }
10291 }
10292 }
10293 else
10294 ent->got.offset = (bfd_vma) -1;
10295 }
10296
10297 /* We now have determined the sizes of the various dynamic sections.
10298 Allocate memory for them. */
10299 relocs = FALSE;
10300 for (s = dynobj->sections; s != NULL; s = s->next)
10301 {
10302 if ((s->flags & SEC_LINKER_CREATED) == 0)
10303 continue;
10304
10305 if (s == htab->brlt || s == htab->relbrlt)
10306 /* These haven't been allocated yet; don't strip. */
10307 continue;
10308 else if (s == htab->elf.sgot
10309 || s == htab->elf.splt
10310 || s == htab->elf.iplt
10311 || s == htab->glink
10312 || s == htab->elf.sdynbss
10313 || s == htab->elf.sdynrelro)
10314 {
10315 /* Strip this section if we don't need it; see the
10316 comment below. */
10317 }
10318 else if (s == htab->glink_eh_frame)
10319 {
10320 if (!bfd_is_abs_section (s->output_section))
10321 /* Not sized yet. */
10322 continue;
10323 }
10324 else if (CONST_STRNEQ (s->name, ".rela"))
10325 {
10326 if (s->size != 0)
10327 {
10328 if (s != htab->elf.srelplt)
10329 relocs = TRUE;
10330
10331 /* We use the reloc_count field as a counter if we need
10332 to copy relocs into the output file. */
10333 s->reloc_count = 0;
10334 }
10335 }
10336 else
10337 {
10338 /* It's not one of our sections, so don't allocate space. */
10339 continue;
10340 }
10341
10342 if (s->size == 0)
10343 {
10344 /* If we don't need this section, strip it from the
10345 output file. This is mostly to handle .rela.bss and
10346 .rela.plt. We must create both sections in
10347 create_dynamic_sections, because they must be created
10348 before the linker maps input sections to output
10349 sections. The linker does that before
10350 adjust_dynamic_symbol is called, and it is that
10351 function which decides whether anything needs to go
10352 into these sections. */
10353 s->flags |= SEC_EXCLUDE;
10354 continue;
10355 }
10356
10357 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10358 continue;
10359
10360 /* Allocate memory for the section contents. We use bfd_zalloc
10361 here in case unused entries are not reclaimed before the
10362 section's contents are written out. This should not happen,
10363 but this way if it does we get a R_PPC64_NONE reloc in .rela
10364 sections instead of garbage.
10365 We also rely on the section contents being zero when writing
10366 the GOT and .dynrelro. */
10367 s->contents = bfd_zalloc (dynobj, s->size);
10368 if (s->contents == NULL)
10369 return FALSE;
10370 }
10371
10372 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10373 {
10374 if (!is_ppc64_elf (ibfd))
10375 continue;
10376
10377 s = ppc64_elf_tdata (ibfd)->got;
10378 if (s != NULL && s != htab->elf.sgot)
10379 {
10380 if (s->size == 0)
10381 s->flags |= SEC_EXCLUDE;
10382 else
10383 {
10384 s->contents = bfd_zalloc (ibfd, s->size);
10385 if (s->contents == NULL)
10386 return FALSE;
10387 }
10388 }
10389 s = ppc64_elf_tdata (ibfd)->relgot;
10390 if (s != NULL)
10391 {
10392 if (s->size == 0)
10393 s->flags |= SEC_EXCLUDE;
10394 else
10395 {
10396 s->contents = bfd_zalloc (ibfd, s->size);
10397 if (s->contents == NULL)
10398 return FALSE;
10399 relocs = TRUE;
10400 s->reloc_count = 0;
10401 }
10402 }
10403 }
10404
10405 if (htab->elf.dynamic_sections_created)
10406 {
10407 bfd_boolean tls_opt;
10408
10409 /* Add some entries to the .dynamic section. We fill in the
10410 values later, in ppc64_elf_finish_dynamic_sections, but we
10411 must add the entries now so that we get the correct size for
10412 the .dynamic section. The DT_DEBUG entry is filled in by the
10413 dynamic linker and used by the debugger. */
10414 #define add_dynamic_entry(TAG, VAL) \
10415 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10416
10417 if (bfd_link_executable (info))
10418 {
10419 if (!add_dynamic_entry (DT_DEBUG, 0))
10420 return FALSE;
10421 }
10422
10423 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10424 {
10425 if (!add_dynamic_entry (DT_PLTGOT, 0)
10426 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10427 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10428 || !add_dynamic_entry (DT_JMPREL, 0)
10429 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10430 return FALSE;
10431 }
10432
10433 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10434 {
10435 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10436 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10437 return FALSE;
10438 }
10439
10440 tls_opt = (htab->params->tls_get_addr_opt
10441 && htab->tls_get_addr_fd != NULL
10442 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10443 if (tls_opt || !htab->opd_abi)
10444 {
10445 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10446 return FALSE;
10447 }
10448
10449 if (relocs)
10450 {
10451 if (!add_dynamic_entry (DT_RELA, 0)
10452 || !add_dynamic_entry (DT_RELASZ, 0)
10453 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10454 return FALSE;
10455
10456 /* If any dynamic relocs apply to a read-only section,
10457 then we need a DT_TEXTREL entry. */
10458 if ((info->flags & DF_TEXTREL) == 0)
10459 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10460
10461 if ((info->flags & DF_TEXTREL) != 0)
10462 {
10463 if (!add_dynamic_entry (DT_TEXTREL, 0))
10464 return FALSE;
10465 }
10466 }
10467 }
10468 #undef add_dynamic_entry
10469
10470 return TRUE;
10471 }
10472
10473 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10474
10475 static bfd_boolean
10476 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10477 {
10478 if (h->plt.plist != NULL
10479 && !h->def_regular
10480 && !h->pointer_equality_needed)
10481 return FALSE;
10482
10483 return _bfd_elf_hash_symbol (h);
10484 }
10485
10486 /* Determine the type of stub needed, if any, for a call. */
10487
10488 static inline enum ppc_stub_type
10489 ppc_type_of_stub (asection *input_sec,
10490 const Elf_Internal_Rela *rel,
10491 struct ppc_link_hash_entry **hash,
10492 struct plt_entry **plt_ent,
10493 bfd_vma destination,
10494 unsigned long local_off)
10495 {
10496 struct ppc_link_hash_entry *h = *hash;
10497 bfd_vma location;
10498 bfd_vma branch_offset;
10499 bfd_vma max_branch_offset;
10500 enum elf_ppc64_reloc_type r_type;
10501
10502 if (h != NULL)
10503 {
10504 struct plt_entry *ent;
10505 struct ppc_link_hash_entry *fdh = h;
10506 if (h->oh != NULL
10507 && h->oh->is_func_descriptor)
10508 {
10509 fdh = ppc_follow_link (h->oh);
10510 *hash = fdh;
10511 }
10512
10513 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10514 if (ent->addend == rel->r_addend
10515 && ent->plt.offset != (bfd_vma) -1)
10516 {
10517 *plt_ent = ent;
10518 return ppc_stub_plt_call;
10519 }
10520
10521 /* Here, we know we don't have a plt entry. If we don't have a
10522 either a defined function descriptor or a defined entry symbol
10523 in a regular object file, then it is pointless trying to make
10524 any other type of stub. */
10525 if (!is_static_defined (&fdh->elf)
10526 && !is_static_defined (&h->elf))
10527 return ppc_stub_none;
10528 }
10529 else if (elf_local_got_ents (input_sec->owner) != NULL)
10530 {
10531 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10532 struct plt_entry **local_plt = (struct plt_entry **)
10533 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10534 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10535
10536 if (local_plt[r_symndx] != NULL)
10537 {
10538 struct plt_entry *ent;
10539
10540 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10541 if (ent->addend == rel->r_addend
10542 && ent->plt.offset != (bfd_vma) -1)
10543 {
10544 *plt_ent = ent;
10545 return ppc_stub_plt_call;
10546 }
10547 }
10548 }
10549
10550 /* Determine where the call point is. */
10551 location = (input_sec->output_offset
10552 + input_sec->output_section->vma
10553 + rel->r_offset);
10554
10555 branch_offset = destination - location;
10556 r_type = ELF64_R_TYPE (rel->r_info);
10557
10558 /* Determine if a long branch stub is needed. */
10559 max_branch_offset = 1 << 25;
10560 if (r_type != R_PPC64_REL24)
10561 max_branch_offset = 1 << 15;
10562
10563 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10564 /* We need a stub. Figure out whether a long_branch or plt_branch
10565 is needed later. */
10566 return ppc_stub_long_branch;
10567
10568 return ppc_stub_none;
10569 }
10570
10571 /* With power7 weakly ordered memory model, it is possible for ld.so
10572 to update a plt entry in one thread and have another thread see a
10573 stale zero toc entry. To avoid this we need some sort of acquire
10574 barrier in the call stub. One solution is to make the load of the
10575 toc word seem to appear to depend on the load of the function entry
10576 word. Another solution is to test for r2 being zero, and branch to
10577 the appropriate glink entry if so.
10578
10579 . fake dep barrier compare
10580 . ld 12,xxx(2) ld 12,xxx(2)
10581 . mtctr 12 mtctr 12
10582 . xor 11,12,12 ld 2,xxx+8(2)
10583 . add 2,2,11 cmpldi 2,0
10584 . ld 2,xxx+8(2) bnectr+
10585 . bctr b <glink_entry>
10586
10587 The solution involving the compare turns out to be faster, so
10588 that's what we use unless the branch won't reach. */
10589
10590 #define ALWAYS_USE_FAKE_DEP 0
10591 #define ALWAYS_EMIT_R2SAVE 0
10592
10593 #define PPC_LO(v) ((v) & 0xffff)
10594 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10595 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10596
10597 static inline unsigned int
10598 plt_stub_size (struct ppc_link_hash_table *htab,
10599 struct ppc_stub_hash_entry *stub_entry,
10600 bfd_vma off)
10601 {
10602 unsigned size = 12;
10603
10604 if (ALWAYS_EMIT_R2SAVE
10605 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10606 size += 4;
10607 if (PPC_HA (off) != 0)
10608 size += 4;
10609 if (htab->opd_abi)
10610 {
10611 size += 4;
10612 if (htab->params->plt_static_chain)
10613 size += 4;
10614 if (htab->params->plt_thread_safe
10615 && htab->elf.dynamic_sections_created
10616 && stub_entry->h != NULL
10617 && stub_entry->h->elf.dynindx != -1)
10618 size += 8;
10619 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10620 size += 4;
10621 }
10622 if (stub_entry->h != NULL
10623 && (stub_entry->h == htab->tls_get_addr_fd
10624 || stub_entry->h == htab->tls_get_addr)
10625 && htab->params->tls_get_addr_opt)
10626 {
10627 size += 7 * 4;
10628 if (ALWAYS_EMIT_R2SAVE
10629 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10630 size += 6 * 4;
10631 }
10632 return size;
10633 }
10634
10635 /* Depending on the sign of plt_stub_align:
10636 If positive, return the padding to align to a 2**plt_stub_align
10637 boundary.
10638 If negative, if this stub would cross fewer 2**plt_stub_align
10639 boundaries if we align, then return the padding needed to do so. */
10640
10641 static inline unsigned int
10642 plt_stub_pad (struct ppc_link_hash_table *htab,
10643 struct ppc_stub_hash_entry *stub_entry,
10644 bfd_vma plt_off)
10645 {
10646 int stub_align;
10647 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10648 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10649
10650 if (htab->params->plt_stub_align >= 0)
10651 {
10652 stub_align = 1 << htab->params->plt_stub_align;
10653 if ((stub_off & (stub_align - 1)) != 0)
10654 return stub_align - (stub_off & (stub_align - 1));
10655 return 0;
10656 }
10657
10658 stub_align = 1 << -htab->params->plt_stub_align;
10659 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10660 > ((stub_size - 1) & -stub_align))
10661 return stub_align - (stub_off & (stub_align - 1));
10662 return 0;
10663 }
10664
10665 /* Build a .plt call stub. */
10666
10667 static inline bfd_byte *
10668 build_plt_stub (struct ppc_link_hash_table *htab,
10669 struct ppc_stub_hash_entry *stub_entry,
10670 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10671 {
10672 bfd *obfd = htab->params->stub_bfd;
10673 bfd_boolean plt_load_toc = htab->opd_abi;
10674 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10675 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10676 && htab->elf.dynamic_sections_created
10677 && stub_entry->h != NULL
10678 && stub_entry->h->elf.dynindx != -1);
10679 bfd_boolean use_fake_dep = plt_thread_safe;
10680 bfd_vma cmp_branch_off = 0;
10681
10682 if (!ALWAYS_USE_FAKE_DEP
10683 && plt_load_toc
10684 && plt_thread_safe
10685 && !((stub_entry->h == htab->tls_get_addr_fd
10686 || stub_entry->h == htab->tls_get_addr)
10687 && htab->params->tls_get_addr_opt))
10688 {
10689 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10690 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10691 / PLT_ENTRY_SIZE (htab));
10692 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10693 bfd_vma to, from;
10694
10695 if (pltindex > 32768)
10696 glinkoff += (pltindex - 32768) * 4;
10697 to = (glinkoff
10698 + htab->glink->output_offset
10699 + htab->glink->output_section->vma);
10700 from = (p - stub_entry->group->stub_sec->contents
10701 + 4 * (ALWAYS_EMIT_R2SAVE
10702 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10703 + 4 * (PPC_HA (offset) != 0)
10704 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10705 != PPC_HA (offset))
10706 + 4 * (plt_static_chain != 0)
10707 + 20
10708 + stub_entry->group->stub_sec->output_offset
10709 + stub_entry->group->stub_sec->output_section->vma);
10710 cmp_branch_off = to - from;
10711 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10712 }
10713
10714 if (PPC_HA (offset) != 0)
10715 {
10716 if (r != NULL)
10717 {
10718 if (ALWAYS_EMIT_R2SAVE
10719 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10720 r[0].r_offset += 4;
10721 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10722 r[1].r_offset = r[0].r_offset + 4;
10723 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10724 r[1].r_addend = r[0].r_addend;
10725 if (plt_load_toc)
10726 {
10727 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10728 {
10729 r[2].r_offset = r[1].r_offset + 4;
10730 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10731 r[2].r_addend = r[0].r_addend;
10732 }
10733 else
10734 {
10735 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10736 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10737 r[2].r_addend = r[0].r_addend + 8;
10738 if (plt_static_chain)
10739 {
10740 r[3].r_offset = r[2].r_offset + 4;
10741 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10742 r[3].r_addend = r[0].r_addend + 16;
10743 }
10744 }
10745 }
10746 }
10747 if (ALWAYS_EMIT_R2SAVE
10748 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10749 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10750 if (plt_load_toc)
10751 {
10752 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10753 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10754 }
10755 else
10756 {
10757 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10758 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10759 }
10760 if (plt_load_toc
10761 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10762 {
10763 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10764 offset = 0;
10765 }
10766 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10767 if (plt_load_toc)
10768 {
10769 if (use_fake_dep)
10770 {
10771 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10772 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10773 }
10774 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10775 if (plt_static_chain)
10776 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10777 }
10778 }
10779 else
10780 {
10781 if (r != NULL)
10782 {
10783 if (ALWAYS_EMIT_R2SAVE
10784 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10785 r[0].r_offset += 4;
10786 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10787 if (plt_load_toc)
10788 {
10789 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10790 {
10791 r[1].r_offset = r[0].r_offset + 4;
10792 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10793 r[1].r_addend = r[0].r_addend;
10794 }
10795 else
10796 {
10797 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10798 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10799 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10800 if (plt_static_chain)
10801 {
10802 r[2].r_offset = r[1].r_offset + 4;
10803 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10804 r[2].r_addend = r[0].r_addend + 8;
10805 }
10806 }
10807 }
10808 }
10809 if (ALWAYS_EMIT_R2SAVE
10810 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10811 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10812 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10813 if (plt_load_toc
10814 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10815 {
10816 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10817 offset = 0;
10818 }
10819 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10820 if (plt_load_toc)
10821 {
10822 if (use_fake_dep)
10823 {
10824 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10825 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10826 }
10827 if (plt_static_chain)
10828 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10829 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10830 }
10831 }
10832 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10833 {
10834 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10835 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10836 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10837 }
10838 else
10839 bfd_put_32 (obfd, BCTR, p), p += 4;
10840 return p;
10841 }
10842
10843 /* Build a special .plt call stub for __tls_get_addr. */
10844
10845 #define LD_R11_0R3 0xe9630000
10846 #define LD_R12_0R3 0xe9830000
10847 #define MR_R0_R3 0x7c601b78
10848 #define CMPDI_R11_0 0x2c2b0000
10849 #define ADD_R3_R12_R13 0x7c6c6a14
10850 #define BEQLR 0x4d820020
10851 #define MR_R3_R0 0x7c030378
10852 #define STD_R11_0R1 0xf9610000
10853 #define BCTRL 0x4e800421
10854 #define LD_R11_0R1 0xe9610000
10855 #define MTLR_R11 0x7d6803a6
10856
10857 static inline bfd_byte *
10858 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10859 struct ppc_stub_hash_entry *stub_entry,
10860 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10861 {
10862 bfd *obfd = htab->params->stub_bfd;
10863
10864 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10865 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10866 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10867 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10868 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10869 bfd_put_32 (obfd, BEQLR, p), p += 4;
10870 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10871 if (r != NULL)
10872 r[0].r_offset += 7 * 4;
10873 if (!ALWAYS_EMIT_R2SAVE
10874 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10875 return build_plt_stub (htab, stub_entry, p, offset, r);
10876
10877 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10878 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10879
10880 if (r != NULL)
10881 r[0].r_offset += 2 * 4;
10882 p = build_plt_stub (htab, stub_entry, p, offset, r);
10883 bfd_put_32 (obfd, BCTRL, p - 4);
10884
10885 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10886 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10887 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10888 bfd_put_32 (obfd, BLR, p), p += 4;
10889
10890 return p;
10891 }
10892
10893 static Elf_Internal_Rela *
10894 get_relocs (asection *sec, int count)
10895 {
10896 Elf_Internal_Rela *relocs;
10897 struct bfd_elf_section_data *elfsec_data;
10898
10899 elfsec_data = elf_section_data (sec);
10900 relocs = elfsec_data->relocs;
10901 if (relocs == NULL)
10902 {
10903 bfd_size_type relsize;
10904 relsize = sec->reloc_count * sizeof (*relocs);
10905 relocs = bfd_alloc (sec->owner, relsize);
10906 if (relocs == NULL)
10907 return NULL;
10908 elfsec_data->relocs = relocs;
10909 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10910 sizeof (Elf_Internal_Shdr));
10911 if (elfsec_data->rela.hdr == NULL)
10912 return NULL;
10913 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10914 * sizeof (Elf64_External_Rela));
10915 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10916 sec->reloc_count = 0;
10917 }
10918 relocs += sec->reloc_count;
10919 sec->reloc_count += count;
10920 return relocs;
10921 }
10922
10923 static bfd_vma
10924 get_r2off (struct bfd_link_info *info,
10925 struct ppc_stub_hash_entry *stub_entry)
10926 {
10927 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10928 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10929
10930 if (r2off == 0)
10931 {
10932 /* Support linking -R objects. Get the toc pointer from the
10933 opd entry. */
10934 char buf[8];
10935 if (!htab->opd_abi)
10936 return r2off;
10937 asection *opd = stub_entry->h->elf.root.u.def.section;
10938 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10939
10940 if (strcmp (opd->name, ".opd") != 0
10941 || opd->reloc_count != 0)
10942 {
10943 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10944 stub_entry->h->elf.root.root.string);
10945 bfd_set_error (bfd_error_bad_value);
10946 return (bfd_vma) -1;
10947 }
10948 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10949 return (bfd_vma) -1;
10950 r2off = bfd_get_64 (opd->owner, buf);
10951 r2off -= elf_gp (info->output_bfd);
10952 }
10953 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10954 return r2off;
10955 }
10956
10957 static bfd_boolean
10958 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10959 {
10960 struct ppc_stub_hash_entry *stub_entry;
10961 struct ppc_branch_hash_entry *br_entry;
10962 struct bfd_link_info *info;
10963 struct ppc_link_hash_table *htab;
10964 bfd_byte *loc;
10965 bfd_byte *p;
10966 bfd_vma dest, off;
10967 int size;
10968 Elf_Internal_Rela *r;
10969 asection *plt;
10970
10971 /* Massage our args to the form they really have. */
10972 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10973 info = in_arg;
10974
10975 htab = ppc_hash_table (info);
10976 if (htab == NULL)
10977 return FALSE;
10978
10979 /* Make a note of the offset within the stubs for this entry. */
10980 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10981 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10982
10983 htab->stub_count[stub_entry->stub_type - 1] += 1;
10984 switch (stub_entry->stub_type)
10985 {
10986 case ppc_stub_long_branch:
10987 case ppc_stub_long_branch_r2off:
10988 /* Branches are relative. This is where we are going to. */
10989 dest = (stub_entry->target_value
10990 + stub_entry->target_section->output_offset
10991 + stub_entry->target_section->output_section->vma);
10992 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10993 off = dest;
10994
10995 /* And this is where we are coming from. */
10996 off -= (stub_entry->stub_offset
10997 + stub_entry->group->stub_sec->output_offset
10998 + stub_entry->group->stub_sec->output_section->vma);
10999
11000 size = 4;
11001 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11002 {
11003 bfd_vma r2off = get_r2off (info, stub_entry);
11004
11005 if (r2off == (bfd_vma) -1)
11006 {
11007 htab->stub_error = TRUE;
11008 return FALSE;
11009 }
11010 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11011 loc += 4;
11012 size = 8;
11013 if (PPC_HA (r2off) != 0)
11014 {
11015 bfd_put_32 (htab->params->stub_bfd,
11016 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11017 loc += 4;
11018 size += 4;
11019 }
11020 if (PPC_LO (r2off) != 0)
11021 {
11022 bfd_put_32 (htab->params->stub_bfd,
11023 ADDI_R2_R2 | PPC_LO (r2off), loc);
11024 loc += 4;
11025 size += 4;
11026 }
11027 off -= size - 4;
11028 }
11029 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
11030
11031 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
11032 {
11033 info->callbacks->einfo
11034 (_("%P: long branch stub `%s' offset overflow\n"),
11035 stub_entry->root.string);
11036 htab->stub_error = TRUE;
11037 return FALSE;
11038 }
11039
11040 if (info->emitrelocations)
11041 {
11042 r = get_relocs (stub_entry->group->stub_sec, 1);
11043 if (r == NULL)
11044 return FALSE;
11045 r->r_offset = loc - stub_entry->group->stub_sec->contents;
11046 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
11047 r->r_addend = dest;
11048 if (stub_entry->h != NULL)
11049 {
11050 struct elf_link_hash_entry **hashes;
11051 unsigned long symndx;
11052 struct ppc_link_hash_entry *h;
11053
11054 hashes = elf_sym_hashes (htab->params->stub_bfd);
11055 if (hashes == NULL)
11056 {
11057 bfd_size_type hsize;
11058
11059 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
11060 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
11061 if (hashes == NULL)
11062 return FALSE;
11063 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11064 htab->stub_globals = 1;
11065 }
11066 symndx = htab->stub_globals++;
11067 h = stub_entry->h;
11068 hashes[symndx] = &h->elf;
11069 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11070 if (h->oh != NULL && h->oh->is_func)
11071 h = ppc_follow_link (h->oh);
11072 if (h->elf.root.u.def.section != stub_entry->target_section)
11073 /* H is an opd symbol. The addend must be zero. */
11074 r->r_addend = 0;
11075 else
11076 {
11077 off = (h->elf.root.u.def.value
11078 + h->elf.root.u.def.section->output_offset
11079 + h->elf.root.u.def.section->output_section->vma);
11080 r->r_addend -= off;
11081 }
11082 }
11083 }
11084 break;
11085
11086 case ppc_stub_plt_branch:
11087 case ppc_stub_plt_branch_r2off:
11088 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11089 stub_entry->root.string + 9,
11090 FALSE, FALSE);
11091 if (br_entry == NULL)
11092 {
11093 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
11094 stub_entry->root.string);
11095 htab->stub_error = TRUE;
11096 return FALSE;
11097 }
11098
11099 dest = (stub_entry->target_value
11100 + stub_entry->target_section->output_offset
11101 + stub_entry->target_section->output_section->vma);
11102 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11103 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11104
11105 bfd_put_64 (htab->brlt->owner, dest,
11106 htab->brlt->contents + br_entry->offset);
11107
11108 if (br_entry->iter == htab->stub_iteration)
11109 {
11110 br_entry->iter = 0;
11111
11112 if (htab->relbrlt != NULL)
11113 {
11114 /* Create a reloc for the branch lookup table entry. */
11115 Elf_Internal_Rela rela;
11116 bfd_byte *rl;
11117
11118 rela.r_offset = (br_entry->offset
11119 + htab->brlt->output_offset
11120 + htab->brlt->output_section->vma);
11121 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11122 rela.r_addend = dest;
11123
11124 rl = htab->relbrlt->contents;
11125 rl += (htab->relbrlt->reloc_count++
11126 * sizeof (Elf64_External_Rela));
11127 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11128 }
11129 else if (info->emitrelocations)
11130 {
11131 r = get_relocs (htab->brlt, 1);
11132 if (r == NULL)
11133 return FALSE;
11134 /* brlt, being SEC_LINKER_CREATED does not go through the
11135 normal reloc processing. Symbols and offsets are not
11136 translated from input file to output file form, so
11137 set up the offset per the output file. */
11138 r->r_offset = (br_entry->offset
11139 + htab->brlt->output_offset
11140 + htab->brlt->output_section->vma);
11141 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11142 r->r_addend = dest;
11143 }
11144 }
11145
11146 dest = (br_entry->offset
11147 + htab->brlt->output_offset
11148 + htab->brlt->output_section->vma);
11149
11150 off = (dest
11151 - elf_gp (htab->brlt->output_section->owner)
11152 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11153
11154 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11155 {
11156 info->callbacks->einfo
11157 (_("%P: linkage table error against `%T'\n"),
11158 stub_entry->root.string);
11159 bfd_set_error (bfd_error_bad_value);
11160 htab->stub_error = TRUE;
11161 return FALSE;
11162 }
11163
11164 if (info->emitrelocations)
11165 {
11166 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11167 if (r == NULL)
11168 return FALSE;
11169 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11170 if (bfd_big_endian (info->output_bfd))
11171 r[0].r_offset += 2;
11172 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11173 r[0].r_offset += 4;
11174 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11175 r[0].r_addend = dest;
11176 if (PPC_HA (off) != 0)
11177 {
11178 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11179 r[1].r_offset = r[0].r_offset + 4;
11180 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11181 r[1].r_addend = r[0].r_addend;
11182 }
11183 }
11184
11185 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11186 {
11187 if (PPC_HA (off) != 0)
11188 {
11189 size = 16;
11190 bfd_put_32 (htab->params->stub_bfd,
11191 ADDIS_R12_R2 | PPC_HA (off), loc);
11192 loc += 4;
11193 bfd_put_32 (htab->params->stub_bfd,
11194 LD_R12_0R12 | PPC_LO (off), loc);
11195 }
11196 else
11197 {
11198 size = 12;
11199 bfd_put_32 (htab->params->stub_bfd,
11200 LD_R12_0R2 | PPC_LO (off), loc);
11201 }
11202 }
11203 else
11204 {
11205 bfd_vma r2off = get_r2off (info, stub_entry);
11206
11207 if (r2off == (bfd_vma) -1)
11208 {
11209 htab->stub_error = TRUE;
11210 return FALSE;
11211 }
11212
11213 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11214 loc += 4;
11215 size = 16;
11216 if (PPC_HA (off) != 0)
11217 {
11218 size += 4;
11219 bfd_put_32 (htab->params->stub_bfd,
11220 ADDIS_R12_R2 | PPC_HA (off), loc);
11221 loc += 4;
11222 bfd_put_32 (htab->params->stub_bfd,
11223 LD_R12_0R12 | PPC_LO (off), loc);
11224 }
11225 else
11226 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11227
11228 if (PPC_HA (r2off) != 0)
11229 {
11230 size += 4;
11231 loc += 4;
11232 bfd_put_32 (htab->params->stub_bfd,
11233 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11234 }
11235 if (PPC_LO (r2off) != 0)
11236 {
11237 size += 4;
11238 loc += 4;
11239 bfd_put_32 (htab->params->stub_bfd,
11240 ADDI_R2_R2 | PPC_LO (r2off), loc);
11241 }
11242 }
11243 loc += 4;
11244 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11245 loc += 4;
11246 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11247 break;
11248
11249 case ppc_stub_plt_call:
11250 case ppc_stub_plt_call_r2save:
11251 if (stub_entry->h != NULL
11252 && stub_entry->h->is_func_descriptor
11253 && stub_entry->h->oh != NULL)
11254 {
11255 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11256
11257 /* If the old-ABI "dot-symbol" is undefined make it weak so
11258 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11259 if (fh->elf.root.type == bfd_link_hash_undefined
11260 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11261 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11262 fh->elf.root.type = bfd_link_hash_undefweak;
11263 }
11264
11265 /* Now build the stub. */
11266 dest = stub_entry->plt_ent->plt.offset & ~1;
11267 if (dest >= (bfd_vma) -2)
11268 abort ();
11269
11270 plt = htab->elf.splt;
11271 if (!htab->elf.dynamic_sections_created
11272 || stub_entry->h == NULL
11273 || stub_entry->h->elf.dynindx == -1)
11274 plt = htab->elf.iplt;
11275
11276 dest += plt->output_offset + plt->output_section->vma;
11277
11278 if (stub_entry->h == NULL
11279 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11280 {
11281 Elf_Internal_Rela rela;
11282 bfd_byte *rl;
11283
11284 rela.r_offset = dest;
11285 if (htab->opd_abi)
11286 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11287 else
11288 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11289 rela.r_addend = (stub_entry->target_value
11290 + stub_entry->target_section->output_offset
11291 + stub_entry->target_section->output_section->vma);
11292
11293 rl = (htab->elf.irelplt->contents
11294 + (htab->elf.irelplt->reloc_count++
11295 * sizeof (Elf64_External_Rela)));
11296 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11297 stub_entry->plt_ent->plt.offset |= 1;
11298 htab->local_ifunc_resolver = 1;
11299 }
11300
11301 off = (dest
11302 - elf_gp (plt->output_section->owner)
11303 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11304
11305 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11306 {
11307 info->callbacks->einfo
11308 /* xgettext:c-format */
11309 (_("%P: linkage table error against `%T'\n"),
11310 stub_entry->h != NULL
11311 ? stub_entry->h->elf.root.root.string
11312 : "<local sym>");
11313 bfd_set_error (bfd_error_bad_value);
11314 htab->stub_error = TRUE;
11315 return FALSE;
11316 }
11317
11318 if (htab->params->plt_stub_align != 0)
11319 {
11320 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11321
11322 stub_entry->group->stub_sec->size += pad;
11323 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11324 loc += pad;
11325 }
11326
11327 r = NULL;
11328 if (info->emitrelocations)
11329 {
11330 r = get_relocs (stub_entry->group->stub_sec,
11331 ((PPC_HA (off) != 0)
11332 + (htab->opd_abi
11333 ? 2 + (htab->params->plt_static_chain
11334 && PPC_HA (off + 16) == PPC_HA (off))
11335 : 1)));
11336 if (r == NULL)
11337 return FALSE;
11338 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11339 if (bfd_big_endian (info->output_bfd))
11340 r[0].r_offset += 2;
11341 r[0].r_addend = dest;
11342 }
11343 if (stub_entry->h != NULL
11344 && (stub_entry->h == htab->tls_get_addr_fd
11345 || stub_entry->h == htab->tls_get_addr)
11346 && htab->params->tls_get_addr_opt)
11347 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11348 else
11349 p = build_plt_stub (htab, stub_entry, loc, off, r);
11350 size = p - loc;
11351 break;
11352
11353 case ppc_stub_save_res:
11354 return TRUE;
11355
11356 default:
11357 BFD_FAIL ();
11358 return FALSE;
11359 }
11360
11361 stub_entry->group->stub_sec->size += size;
11362
11363 if (htab->params->emit_stub_syms)
11364 {
11365 struct elf_link_hash_entry *h;
11366 size_t len1, len2;
11367 char *name;
11368 const char *const stub_str[] = { "long_branch",
11369 "long_branch_r2off",
11370 "plt_branch",
11371 "plt_branch_r2off",
11372 "plt_call",
11373 "plt_call" };
11374
11375 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11376 len2 = strlen (stub_entry->root.string);
11377 name = bfd_malloc (len1 + len2 + 2);
11378 if (name == NULL)
11379 return FALSE;
11380 memcpy (name, stub_entry->root.string, 9);
11381 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11382 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11383 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11384 if (h == NULL)
11385 return FALSE;
11386 if (h->root.type == bfd_link_hash_new)
11387 {
11388 h->root.type = bfd_link_hash_defined;
11389 h->root.u.def.section = stub_entry->group->stub_sec;
11390 h->root.u.def.value = stub_entry->stub_offset;
11391 h->ref_regular = 1;
11392 h->def_regular = 1;
11393 h->ref_regular_nonweak = 1;
11394 h->forced_local = 1;
11395 h->non_elf = 0;
11396 h->root.linker_def = 1;
11397 }
11398 }
11399
11400 return TRUE;
11401 }
11402
11403 /* As above, but don't actually build the stub. Just bump offset so
11404 we know stub section sizes, and select plt_branch stubs where
11405 long_branch stubs won't do. */
11406
11407 static bfd_boolean
11408 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11409 {
11410 struct ppc_stub_hash_entry *stub_entry;
11411 struct bfd_link_info *info;
11412 struct ppc_link_hash_table *htab;
11413 bfd_vma off;
11414 int size;
11415
11416 /* Massage our args to the form they really have. */
11417 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11418 info = in_arg;
11419
11420 htab = ppc_hash_table (info);
11421 if (htab == NULL)
11422 return FALSE;
11423
11424 if (stub_entry->h != NULL
11425 && stub_entry->h->save_res
11426 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11427 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11428 {
11429 /* Don't make stubs to out-of-line register save/restore
11430 functions. Instead, emit copies of the functions. */
11431 stub_entry->group->needs_save_res = 1;
11432 stub_entry->stub_type = ppc_stub_save_res;
11433 return TRUE;
11434 }
11435
11436 if (stub_entry->stub_type == ppc_stub_plt_call
11437 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11438 {
11439 asection *plt;
11440 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11441 if (off >= (bfd_vma) -2)
11442 abort ();
11443 plt = htab->elf.splt;
11444 if (!htab->elf.dynamic_sections_created
11445 || stub_entry->h == NULL
11446 || stub_entry->h->elf.dynindx == -1)
11447 plt = htab->elf.iplt;
11448 off += (plt->output_offset
11449 + plt->output_section->vma
11450 - elf_gp (plt->output_section->owner)
11451 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11452
11453 size = plt_stub_size (htab, stub_entry, off);
11454 if (stub_entry->h != NULL
11455 && (stub_entry->h == htab->tls_get_addr_fd
11456 || stub_entry->h == htab->tls_get_addr)
11457 && htab->params->tls_get_addr_opt
11458 && (ALWAYS_EMIT_R2SAVE
11459 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11460 stub_entry->group->tls_get_addr_opt_bctrl
11461 = stub_entry->group->stub_sec->size + size - 5 * 4;
11462
11463 if (htab->params->plt_stub_align)
11464 size += plt_stub_pad (htab, stub_entry, off);
11465 if (info->emitrelocations)
11466 {
11467 stub_entry->group->stub_sec->reloc_count
11468 += ((PPC_HA (off) != 0)
11469 + (htab->opd_abi
11470 ? 2 + (htab->params->plt_static_chain
11471 && PPC_HA (off + 16) == PPC_HA (off))
11472 : 1));
11473 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11474 }
11475 }
11476 else
11477 {
11478 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11479 variants. */
11480 bfd_vma r2off = 0;
11481 bfd_vma local_off = 0;
11482
11483 off = (stub_entry->target_value
11484 + stub_entry->target_section->output_offset
11485 + stub_entry->target_section->output_section->vma);
11486 off -= (stub_entry->group->stub_sec->size
11487 + stub_entry->group->stub_sec->output_offset
11488 + stub_entry->group->stub_sec->output_section->vma);
11489
11490 /* Reset the stub type from the plt variant in case we now
11491 can reach with a shorter stub. */
11492 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11493 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11494
11495 size = 4;
11496 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11497 {
11498 r2off = get_r2off (info, stub_entry);
11499 if (r2off == (bfd_vma) -1)
11500 {
11501 htab->stub_error = TRUE;
11502 return FALSE;
11503 }
11504 size = 8;
11505 if (PPC_HA (r2off) != 0)
11506 size += 4;
11507 if (PPC_LO (r2off) != 0)
11508 size += 4;
11509 off -= size - 4;
11510 }
11511
11512 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11513
11514 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11515 Do the same for -R objects without function descriptors. */
11516 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11517 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11518 && r2off == 0
11519 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11520 {
11521 struct ppc_branch_hash_entry *br_entry;
11522
11523 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11524 stub_entry->root.string + 9,
11525 TRUE, FALSE);
11526 if (br_entry == NULL)
11527 {
11528 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11529 stub_entry->root.string);
11530 htab->stub_error = TRUE;
11531 return FALSE;
11532 }
11533
11534 if (br_entry->iter != htab->stub_iteration)
11535 {
11536 br_entry->iter = htab->stub_iteration;
11537 br_entry->offset = htab->brlt->size;
11538 htab->brlt->size += 8;
11539
11540 if (htab->relbrlt != NULL)
11541 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11542 else if (info->emitrelocations)
11543 {
11544 htab->brlt->reloc_count += 1;
11545 htab->brlt->flags |= SEC_RELOC;
11546 }
11547 }
11548
11549 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11550 off = (br_entry->offset
11551 + htab->brlt->output_offset
11552 + htab->brlt->output_section->vma
11553 - elf_gp (htab->brlt->output_section->owner)
11554 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11555
11556 if (info->emitrelocations)
11557 {
11558 stub_entry->group->stub_sec->reloc_count
11559 += 1 + (PPC_HA (off) != 0);
11560 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11561 }
11562
11563 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11564 {
11565 size = 12;
11566 if (PPC_HA (off) != 0)
11567 size = 16;
11568 }
11569 else
11570 {
11571 size = 16;
11572 if (PPC_HA (off) != 0)
11573 size += 4;
11574
11575 if (PPC_HA (r2off) != 0)
11576 size += 4;
11577 if (PPC_LO (r2off) != 0)
11578 size += 4;
11579 }
11580 }
11581 else if (info->emitrelocations)
11582 {
11583 stub_entry->group->stub_sec->reloc_count += 1;
11584 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11585 }
11586 }
11587
11588 stub_entry->group->stub_sec->size += size;
11589 return TRUE;
11590 }
11591
11592 /* Set up various things so that we can make a list of input sections
11593 for each output section included in the link. Returns -1 on error,
11594 0 when no stubs will be needed, and 1 on success. */
11595
11596 int
11597 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11598 {
11599 unsigned int id;
11600 bfd_size_type amt;
11601 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11602
11603 if (htab == NULL)
11604 return -1;
11605
11606 htab->sec_info_arr_size = bfd_get_next_section_id ();
11607 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11608 htab->sec_info = bfd_zmalloc (amt);
11609 if (htab->sec_info == NULL)
11610 return -1;
11611
11612 /* Set toc_off for com, und, abs and ind sections. */
11613 for (id = 0; id < 3; id++)
11614 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11615
11616 return 1;
11617 }
11618
11619 /* Set up for first pass at multitoc partitioning. */
11620
11621 void
11622 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11623 {
11624 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11625
11626 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11627 htab->toc_bfd = NULL;
11628 htab->toc_first_sec = NULL;
11629 }
11630
11631 /* The linker repeatedly calls this function for each TOC input section
11632 and linker generated GOT section. Group input bfds such that the toc
11633 within a group is less than 64k in size. */
11634
11635 bfd_boolean
11636 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11637 {
11638 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11639 bfd_vma addr, off, limit;
11640
11641 if (htab == NULL)
11642 return FALSE;
11643
11644 if (!htab->second_toc_pass)
11645 {
11646 /* Keep track of the first .toc or .got section for this input bfd. */
11647 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11648
11649 if (new_bfd)
11650 {
11651 htab->toc_bfd = isec->owner;
11652 htab->toc_first_sec = isec;
11653 }
11654
11655 addr = isec->output_offset + isec->output_section->vma;
11656 off = addr - htab->toc_curr;
11657 limit = 0x80008000;
11658 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11659 limit = 0x10000;
11660 if (off + isec->size > limit)
11661 {
11662 addr = (htab->toc_first_sec->output_offset
11663 + htab->toc_first_sec->output_section->vma);
11664 htab->toc_curr = addr;
11665 htab->toc_curr &= -TOC_BASE_ALIGN;
11666 }
11667
11668 /* toc_curr is the base address of this toc group. Set elf_gp
11669 for the input section to be the offset relative to the
11670 output toc base plus 0x8000. Making the input elf_gp an
11671 offset allows us to move the toc as a whole without
11672 recalculating input elf_gp. */
11673 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11674 off += TOC_BASE_OFF;
11675
11676 /* Die if someone uses a linker script that doesn't keep input
11677 file .toc and .got together. */
11678 if (new_bfd
11679 && elf_gp (isec->owner) != 0
11680 && elf_gp (isec->owner) != off)
11681 return FALSE;
11682
11683 elf_gp (isec->owner) = off;
11684 return TRUE;
11685 }
11686
11687 /* During the second pass toc_first_sec points to the start of
11688 a toc group, and toc_curr is used to track the old elf_gp.
11689 We use toc_bfd to ensure we only look at each bfd once. */
11690 if (htab->toc_bfd == isec->owner)
11691 return TRUE;
11692 htab->toc_bfd = isec->owner;
11693
11694 if (htab->toc_first_sec == NULL
11695 || htab->toc_curr != elf_gp (isec->owner))
11696 {
11697 htab->toc_curr = elf_gp (isec->owner);
11698 htab->toc_first_sec = isec;
11699 }
11700 addr = (htab->toc_first_sec->output_offset
11701 + htab->toc_first_sec->output_section->vma);
11702 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11703 elf_gp (isec->owner) = off;
11704
11705 return TRUE;
11706 }
11707
11708 /* Called via elf_link_hash_traverse to merge GOT entries for global
11709 symbol H. */
11710
11711 static bfd_boolean
11712 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11713 {
11714 if (h->root.type == bfd_link_hash_indirect)
11715 return TRUE;
11716
11717 merge_got_entries (&h->got.glist);
11718
11719 return TRUE;
11720 }
11721
11722 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11723 symbol H. */
11724
11725 static bfd_boolean
11726 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11727 {
11728 struct got_entry *gent;
11729
11730 if (h->root.type == bfd_link_hash_indirect)
11731 return TRUE;
11732
11733 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11734 if (!gent->is_indirect)
11735 allocate_got (h, (struct bfd_link_info *) inf, gent);
11736 return TRUE;
11737 }
11738
11739 /* Called on the first multitoc pass after the last call to
11740 ppc64_elf_next_toc_section. This function removes duplicate GOT
11741 entries. */
11742
11743 bfd_boolean
11744 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11745 {
11746 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11747 struct bfd *ibfd, *ibfd2;
11748 bfd_boolean done_something;
11749
11750 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11751
11752 if (!htab->do_multi_toc)
11753 return FALSE;
11754
11755 /* Merge global sym got entries within a toc group. */
11756 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11757
11758 /* And tlsld_got. */
11759 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11760 {
11761 struct got_entry *ent, *ent2;
11762
11763 if (!is_ppc64_elf (ibfd))
11764 continue;
11765
11766 ent = ppc64_tlsld_got (ibfd);
11767 if (!ent->is_indirect
11768 && ent->got.offset != (bfd_vma) -1)
11769 {
11770 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11771 {
11772 if (!is_ppc64_elf (ibfd2))
11773 continue;
11774
11775 ent2 = ppc64_tlsld_got (ibfd2);
11776 if (!ent2->is_indirect
11777 && ent2->got.offset != (bfd_vma) -1
11778 && elf_gp (ibfd2) == elf_gp (ibfd))
11779 {
11780 ent2->is_indirect = TRUE;
11781 ent2->got.ent = ent;
11782 }
11783 }
11784 }
11785 }
11786
11787 /* Zap sizes of got sections. */
11788 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11789 htab->elf.irelplt->size -= htab->got_reli_size;
11790 htab->got_reli_size = 0;
11791
11792 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11793 {
11794 asection *got, *relgot;
11795
11796 if (!is_ppc64_elf (ibfd))
11797 continue;
11798
11799 got = ppc64_elf_tdata (ibfd)->got;
11800 if (got != NULL)
11801 {
11802 got->rawsize = got->size;
11803 got->size = 0;
11804 relgot = ppc64_elf_tdata (ibfd)->relgot;
11805 relgot->rawsize = relgot->size;
11806 relgot->size = 0;
11807 }
11808 }
11809
11810 /* Now reallocate the got, local syms first. We don't need to
11811 allocate section contents again since we never increase size. */
11812 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11813 {
11814 struct got_entry **lgot_ents;
11815 struct got_entry **end_lgot_ents;
11816 struct plt_entry **local_plt;
11817 struct plt_entry **end_local_plt;
11818 unsigned char *lgot_masks;
11819 bfd_size_type locsymcount;
11820 Elf_Internal_Shdr *symtab_hdr;
11821 asection *s;
11822
11823 if (!is_ppc64_elf (ibfd))
11824 continue;
11825
11826 lgot_ents = elf_local_got_ents (ibfd);
11827 if (!lgot_ents)
11828 continue;
11829
11830 symtab_hdr = &elf_symtab_hdr (ibfd);
11831 locsymcount = symtab_hdr->sh_info;
11832 end_lgot_ents = lgot_ents + locsymcount;
11833 local_plt = (struct plt_entry **) end_lgot_ents;
11834 end_local_plt = local_plt + locsymcount;
11835 lgot_masks = (unsigned char *) end_local_plt;
11836 s = ppc64_elf_tdata (ibfd)->got;
11837 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11838 {
11839 struct got_entry *ent;
11840
11841 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11842 {
11843 unsigned int ent_size = 8;
11844 unsigned int rel_size = sizeof (Elf64_External_Rela);
11845
11846 ent->got.offset = s->size;
11847 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11848 {
11849 ent_size *= 2;
11850 rel_size *= 2;
11851 }
11852 s->size += ent_size;
11853 if ((*lgot_masks & PLT_IFUNC) != 0)
11854 {
11855 htab->elf.irelplt->size += rel_size;
11856 htab->got_reli_size += rel_size;
11857 }
11858 else if (bfd_link_pic (info))
11859 {
11860 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11861 srel->size += rel_size;
11862 }
11863 }
11864 }
11865 }
11866
11867 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11868
11869 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11870 {
11871 struct got_entry *ent;
11872
11873 if (!is_ppc64_elf (ibfd))
11874 continue;
11875
11876 ent = ppc64_tlsld_got (ibfd);
11877 if (!ent->is_indirect
11878 && ent->got.offset != (bfd_vma) -1)
11879 {
11880 asection *s = ppc64_elf_tdata (ibfd)->got;
11881 ent->got.offset = s->size;
11882 s->size += 16;
11883 if (bfd_link_pic (info))
11884 {
11885 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11886 srel->size += sizeof (Elf64_External_Rela);
11887 }
11888 }
11889 }
11890
11891 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11892 if (!done_something)
11893 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11894 {
11895 asection *got;
11896
11897 if (!is_ppc64_elf (ibfd))
11898 continue;
11899
11900 got = ppc64_elf_tdata (ibfd)->got;
11901 if (got != NULL)
11902 {
11903 done_something = got->rawsize != got->size;
11904 if (done_something)
11905 break;
11906 }
11907 }
11908
11909 if (done_something)
11910 (*htab->params->layout_sections_again) ();
11911
11912 /* Set up for second pass over toc sections to recalculate elf_gp
11913 on input sections. */
11914 htab->toc_bfd = NULL;
11915 htab->toc_first_sec = NULL;
11916 htab->second_toc_pass = TRUE;
11917 return done_something;
11918 }
11919
11920 /* Called after second pass of multitoc partitioning. */
11921
11922 void
11923 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11924 {
11925 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11926
11927 /* After the second pass, toc_curr tracks the TOC offset used
11928 for code sections below in ppc64_elf_next_input_section. */
11929 htab->toc_curr = TOC_BASE_OFF;
11930 }
11931
11932 /* No toc references were found in ISEC. If the code in ISEC makes no
11933 calls, then there's no need to use toc adjusting stubs when branching
11934 into ISEC. Actually, indirect calls from ISEC are OK as they will
11935 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11936 needed, and 2 if a cyclical call-graph was found but no other reason
11937 for a stub was detected. If called from the top level, a return of
11938 2 means the same as a return of 0. */
11939
11940 static int
11941 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11942 {
11943 int ret;
11944
11945 /* Mark this section as checked. */
11946 isec->call_check_done = 1;
11947
11948 /* We know none of our code bearing sections will need toc stubs. */
11949 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11950 return 0;
11951
11952 if (isec->size == 0)
11953 return 0;
11954
11955 if (isec->output_section == NULL)
11956 return 0;
11957
11958 ret = 0;
11959 if (isec->reloc_count != 0)
11960 {
11961 Elf_Internal_Rela *relstart, *rel;
11962 Elf_Internal_Sym *local_syms;
11963 struct ppc_link_hash_table *htab;
11964
11965 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11966 info->keep_memory);
11967 if (relstart == NULL)
11968 return -1;
11969
11970 /* Look for branches to outside of this section. */
11971 local_syms = NULL;
11972 htab = ppc_hash_table (info);
11973 if (htab == NULL)
11974 return -1;
11975
11976 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11977 {
11978 enum elf_ppc64_reloc_type r_type;
11979 unsigned long r_symndx;
11980 struct elf_link_hash_entry *h;
11981 struct ppc_link_hash_entry *eh;
11982 Elf_Internal_Sym *sym;
11983 asection *sym_sec;
11984 struct _opd_sec_data *opd;
11985 bfd_vma sym_value;
11986 bfd_vma dest;
11987
11988 r_type = ELF64_R_TYPE (rel->r_info);
11989 if (r_type != R_PPC64_REL24
11990 && r_type != R_PPC64_REL14
11991 && r_type != R_PPC64_REL14_BRTAKEN
11992 && r_type != R_PPC64_REL14_BRNTAKEN)
11993 continue;
11994
11995 r_symndx = ELF64_R_SYM (rel->r_info);
11996 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11997 isec->owner))
11998 {
11999 ret = -1;
12000 break;
12001 }
12002
12003 /* Calls to dynamic lib functions go through a plt call stub
12004 that uses r2. */
12005 eh = (struct ppc_link_hash_entry *) h;
12006 if (eh != NULL
12007 && (eh->elf.plt.plist != NULL
12008 || (eh->oh != NULL
12009 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
12010 {
12011 ret = 1;
12012 break;
12013 }
12014
12015 if (sym_sec == NULL)
12016 /* Ignore other undefined symbols. */
12017 continue;
12018
12019 /* Assume branches to other sections not included in the
12020 link need stubs too, to cover -R and absolute syms. */
12021 if (sym_sec->output_section == NULL)
12022 {
12023 ret = 1;
12024 break;
12025 }
12026
12027 if (h == NULL)
12028 sym_value = sym->st_value;
12029 else
12030 {
12031 if (h->root.type != bfd_link_hash_defined
12032 && h->root.type != bfd_link_hash_defweak)
12033 abort ();
12034 sym_value = h->root.u.def.value;
12035 }
12036 sym_value += rel->r_addend;
12037
12038 /* If this branch reloc uses an opd sym, find the code section. */
12039 opd = get_opd_info (sym_sec);
12040 if (opd != NULL)
12041 {
12042 if (h == NULL && opd->adjust != NULL)
12043 {
12044 long adjust;
12045
12046 adjust = opd->adjust[OPD_NDX (sym_value)];
12047 if (adjust == -1)
12048 /* Assume deleted functions won't ever be called. */
12049 continue;
12050 sym_value += adjust;
12051 }
12052
12053 dest = opd_entry_value (sym_sec, sym_value,
12054 &sym_sec, NULL, FALSE);
12055 if (dest == (bfd_vma) -1)
12056 continue;
12057 }
12058 else
12059 dest = (sym_value
12060 + sym_sec->output_offset
12061 + sym_sec->output_section->vma);
12062
12063 /* Ignore branch to self. */
12064 if (sym_sec == isec)
12065 continue;
12066
12067 /* If the called function uses the toc, we need a stub. */
12068 if (sym_sec->has_toc_reloc
12069 || sym_sec->makes_toc_func_call)
12070 {
12071 ret = 1;
12072 break;
12073 }
12074
12075 /* Assume any branch that needs a long branch stub might in fact
12076 need a plt_branch stub. A plt_branch stub uses r2. */
12077 else if (dest - (isec->output_offset
12078 + isec->output_section->vma
12079 + rel->r_offset) + (1 << 25)
12080 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12081 ? h->other
12082 : sym->st_other))
12083 {
12084 ret = 1;
12085 break;
12086 }
12087
12088 /* If calling back to a section in the process of being
12089 tested, we can't say for sure that no toc adjusting stubs
12090 are needed, so don't return zero. */
12091 else if (sym_sec->call_check_in_progress)
12092 ret = 2;
12093
12094 /* Branches to another section that itself doesn't have any TOC
12095 references are OK. Recursively call ourselves to check. */
12096 else if (!sym_sec->call_check_done)
12097 {
12098 int recur;
12099
12100 /* Mark current section as indeterminate, so that other
12101 sections that call back to current won't be marked as
12102 known. */
12103 isec->call_check_in_progress = 1;
12104 recur = toc_adjusting_stub_needed (info, sym_sec);
12105 isec->call_check_in_progress = 0;
12106
12107 if (recur != 0)
12108 {
12109 ret = recur;
12110 if (recur != 2)
12111 break;
12112 }
12113 }
12114 }
12115
12116 if (local_syms != NULL
12117 && (elf_symtab_hdr (isec->owner).contents
12118 != (unsigned char *) local_syms))
12119 free (local_syms);
12120 if (elf_section_data (isec)->relocs != relstart)
12121 free (relstart);
12122 }
12123
12124 if ((ret & 1) == 0
12125 && isec->map_head.s != NULL
12126 && (strcmp (isec->output_section->name, ".init") == 0
12127 || strcmp (isec->output_section->name, ".fini") == 0))
12128 {
12129 if (isec->map_head.s->has_toc_reloc
12130 || isec->map_head.s->makes_toc_func_call)
12131 ret = 1;
12132 else if (!isec->map_head.s->call_check_done)
12133 {
12134 int recur;
12135 isec->call_check_in_progress = 1;
12136 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12137 isec->call_check_in_progress = 0;
12138 if (recur != 0)
12139 ret = recur;
12140 }
12141 }
12142
12143 if (ret == 1)
12144 isec->makes_toc_func_call = 1;
12145
12146 return ret;
12147 }
12148
12149 /* The linker repeatedly calls this function for each input section,
12150 in the order that input sections are linked into output sections.
12151 Build lists of input sections to determine groupings between which
12152 we may insert linker stubs. */
12153
12154 bfd_boolean
12155 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12156 {
12157 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12158
12159 if (htab == NULL)
12160 return FALSE;
12161
12162 if ((isec->output_section->flags & SEC_CODE) != 0
12163 && isec->output_section->id < htab->sec_info_arr_size)
12164 {
12165 /* This happens to make the list in reverse order,
12166 which is what we want. */
12167 htab->sec_info[isec->id].u.list
12168 = htab->sec_info[isec->output_section->id].u.list;
12169 htab->sec_info[isec->output_section->id].u.list = isec;
12170 }
12171
12172 if (htab->multi_toc_needed)
12173 {
12174 /* Analyse sections that aren't already flagged as needing a
12175 valid toc pointer. Exclude .fixup for the linux kernel.
12176 .fixup contains branches, but only back to the function that
12177 hit an exception. */
12178 if (!(isec->has_toc_reloc
12179 || (isec->flags & SEC_CODE) == 0
12180 || strcmp (isec->name, ".fixup") == 0
12181 || isec->call_check_done))
12182 {
12183 if (toc_adjusting_stub_needed (info, isec) < 0)
12184 return FALSE;
12185 }
12186 /* Make all sections use the TOC assigned for this object file.
12187 This will be wrong for pasted sections; We fix that in
12188 check_pasted_section(). */
12189 if (elf_gp (isec->owner) != 0)
12190 htab->toc_curr = elf_gp (isec->owner);
12191 }
12192
12193 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12194 return TRUE;
12195 }
12196
12197 /* Check that all .init and .fini sections use the same toc, if they
12198 have toc relocs. */
12199
12200 static bfd_boolean
12201 check_pasted_section (struct bfd_link_info *info, const char *name)
12202 {
12203 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12204
12205 if (o != NULL)
12206 {
12207 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12208 bfd_vma toc_off = 0;
12209 asection *i;
12210
12211 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12212 if (i->has_toc_reloc)
12213 {
12214 if (toc_off == 0)
12215 toc_off = htab->sec_info[i->id].toc_off;
12216 else if (toc_off != htab->sec_info[i->id].toc_off)
12217 return FALSE;
12218 }
12219
12220 if (toc_off == 0)
12221 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12222 if (i->makes_toc_func_call)
12223 {
12224 toc_off = htab->sec_info[i->id].toc_off;
12225 break;
12226 }
12227
12228 /* Make sure the whole pasted function uses the same toc offset. */
12229 if (toc_off != 0)
12230 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12231 htab->sec_info[i->id].toc_off = toc_off;
12232 }
12233 return TRUE;
12234 }
12235
12236 bfd_boolean
12237 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12238 {
12239 return (check_pasted_section (info, ".init")
12240 & check_pasted_section (info, ".fini"));
12241 }
12242
12243 /* See whether we can group stub sections together. Grouping stub
12244 sections may result in fewer stubs. More importantly, we need to
12245 put all .init* and .fini* stubs at the beginning of the .init or
12246 .fini output sections respectively, because glibc splits the
12247 _init and _fini functions into multiple parts. Putting a stub in
12248 the middle of a function is not a good idea. */
12249
12250 static bfd_boolean
12251 group_sections (struct bfd_link_info *info,
12252 bfd_size_type stub_group_size,
12253 bfd_boolean stubs_always_before_branch)
12254 {
12255 struct ppc_link_hash_table *htab;
12256 asection *osec;
12257 bfd_boolean suppress_size_errors;
12258
12259 htab = ppc_hash_table (info);
12260 if (htab == NULL)
12261 return FALSE;
12262
12263 suppress_size_errors = FALSE;
12264 if (stub_group_size == 1)
12265 {
12266 /* Default values. */
12267 if (stubs_always_before_branch)
12268 stub_group_size = 0x1e00000;
12269 else
12270 stub_group_size = 0x1c00000;
12271 suppress_size_errors = TRUE;
12272 }
12273
12274 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12275 {
12276 asection *tail;
12277
12278 if (osec->id >= htab->sec_info_arr_size)
12279 continue;
12280
12281 tail = htab->sec_info[osec->id].u.list;
12282 while (tail != NULL)
12283 {
12284 asection *curr;
12285 asection *prev;
12286 bfd_size_type total;
12287 bfd_boolean big_sec;
12288 bfd_vma curr_toc;
12289 struct map_stub *group;
12290 bfd_size_type group_size;
12291
12292 curr = tail;
12293 total = tail->size;
12294 group_size = (ppc64_elf_section_data (tail) != NULL
12295 && ppc64_elf_section_data (tail)->has_14bit_branch
12296 ? stub_group_size >> 10 : stub_group_size);
12297
12298 big_sec = total > group_size;
12299 if (big_sec && !suppress_size_errors)
12300 /* xgettext:c-format */
12301 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12302 tail->owner, tail);
12303 curr_toc = htab->sec_info[tail->id].toc_off;
12304
12305 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12306 && ((total += curr->output_offset - prev->output_offset)
12307 < (ppc64_elf_section_data (prev) != NULL
12308 && ppc64_elf_section_data (prev)->has_14bit_branch
12309 ? (group_size = stub_group_size >> 10) : group_size))
12310 && htab->sec_info[prev->id].toc_off == curr_toc)
12311 curr = prev;
12312
12313 /* OK, the size from the start of CURR to the end is less
12314 than group_size and thus can be handled by one stub
12315 section. (or the tail section is itself larger than
12316 group_size, in which case we may be toast.) We should
12317 really be keeping track of the total size of stubs added
12318 here, as stubs contribute to the final output section
12319 size. That's a little tricky, and this way will only
12320 break if stubs added make the total size more than 2^25,
12321 ie. for the default stub_group_size, if stubs total more
12322 than 2097152 bytes, or nearly 75000 plt call stubs. */
12323 group = bfd_alloc (curr->owner, sizeof (*group));
12324 if (group == NULL)
12325 return FALSE;
12326 group->link_sec = curr;
12327 group->stub_sec = NULL;
12328 group->needs_save_res = 0;
12329 group->tls_get_addr_opt_bctrl = -1u;
12330 group->next = htab->group;
12331 htab->group = group;
12332 do
12333 {
12334 prev = htab->sec_info[tail->id].u.list;
12335 /* Set up this stub group. */
12336 htab->sec_info[tail->id].u.group = group;
12337 }
12338 while (tail != curr && (tail = prev) != NULL);
12339
12340 /* But wait, there's more! Input sections up to group_size
12341 bytes before the stub section can be handled by it too.
12342 Don't do this if we have a really large section after the
12343 stubs, as adding more stubs increases the chance that
12344 branches may not reach into the stub section. */
12345 if (!stubs_always_before_branch && !big_sec)
12346 {
12347 total = 0;
12348 while (prev != NULL
12349 && ((total += tail->output_offset - prev->output_offset)
12350 < (ppc64_elf_section_data (prev) != NULL
12351 && ppc64_elf_section_data (prev)->has_14bit_branch
12352 ? (group_size = stub_group_size >> 10) : group_size))
12353 && htab->sec_info[prev->id].toc_off == curr_toc)
12354 {
12355 tail = prev;
12356 prev = htab->sec_info[tail->id].u.list;
12357 htab->sec_info[tail->id].u.group = group;
12358 }
12359 }
12360 tail = prev;
12361 }
12362 }
12363 return TRUE;
12364 }
12365
12366 static const unsigned char glink_eh_frame_cie[] =
12367 {
12368 0, 0, 0, 16, /* length. */
12369 0, 0, 0, 0, /* id. */
12370 1, /* CIE version. */
12371 'z', 'R', 0, /* Augmentation string. */
12372 4, /* Code alignment. */
12373 0x78, /* Data alignment. */
12374 65, /* RA reg. */
12375 1, /* Augmentation size. */
12376 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12377 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12378 };
12379
12380 static size_t
12381 stub_eh_frame_size (struct map_stub *group, size_t align)
12382 {
12383 size_t this_size = 17;
12384 if (group->tls_get_addr_opt_bctrl != -1u)
12385 {
12386 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12387 if (to_bctrl < 64)
12388 this_size += 1;
12389 else if (to_bctrl < 256)
12390 this_size += 2;
12391 else if (to_bctrl < 65536)
12392 this_size += 3;
12393 else
12394 this_size += 5;
12395 this_size += 6;
12396 }
12397 this_size = (this_size + align - 1) & -align;
12398 return this_size;
12399 }
12400
12401 /* Stripping output sections is normally done before dynamic section
12402 symbols have been allocated. This function is called later, and
12403 handles cases like htab->brlt which is mapped to its own output
12404 section. */
12405
12406 static void
12407 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12408 {
12409 if (isec->size == 0
12410 && isec->output_section->size == 0
12411 && !(isec->output_section->flags & SEC_KEEP)
12412 && !bfd_section_removed_from_list (info->output_bfd,
12413 isec->output_section)
12414 && elf_section_data (isec->output_section)->dynindx == 0)
12415 {
12416 isec->output_section->flags |= SEC_EXCLUDE;
12417 bfd_section_list_remove (info->output_bfd, isec->output_section);
12418 info->output_bfd->section_count--;
12419 }
12420 }
12421
12422 /* Determine and set the size of the stub section for a final link.
12423
12424 The basic idea here is to examine all the relocations looking for
12425 PC-relative calls to a target that is unreachable with a "bl"
12426 instruction. */
12427
12428 bfd_boolean
12429 ppc64_elf_size_stubs (struct bfd_link_info *info)
12430 {
12431 bfd_size_type stub_group_size;
12432 bfd_boolean stubs_always_before_branch;
12433 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12434
12435 if (htab == NULL)
12436 return FALSE;
12437
12438 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12439 htab->params->plt_thread_safe = 1;
12440 if (!htab->opd_abi)
12441 htab->params->plt_thread_safe = 0;
12442 else if (htab->params->plt_thread_safe == -1)
12443 {
12444 static const char *const thread_starter[] =
12445 {
12446 "pthread_create",
12447 /* libstdc++ */
12448 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12449 /* librt */
12450 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12451 "mq_notify", "create_timer",
12452 /* libanl */
12453 "getaddrinfo_a",
12454 /* libgomp */
12455 "GOMP_parallel",
12456 "GOMP_parallel_start",
12457 "GOMP_parallel_loop_static",
12458 "GOMP_parallel_loop_static_start",
12459 "GOMP_parallel_loop_dynamic",
12460 "GOMP_parallel_loop_dynamic_start",
12461 "GOMP_parallel_loop_guided",
12462 "GOMP_parallel_loop_guided_start",
12463 "GOMP_parallel_loop_runtime",
12464 "GOMP_parallel_loop_runtime_start",
12465 "GOMP_parallel_sections",
12466 "GOMP_parallel_sections_start",
12467 /* libgo */
12468 "__go_go",
12469 };
12470 unsigned i;
12471
12472 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12473 {
12474 struct elf_link_hash_entry *h;
12475 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12476 FALSE, FALSE, TRUE);
12477 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12478 if (htab->params->plt_thread_safe)
12479 break;
12480 }
12481 }
12482 stubs_always_before_branch = htab->params->group_size < 0;
12483 if (htab->params->group_size < 0)
12484 stub_group_size = -htab->params->group_size;
12485 else
12486 stub_group_size = htab->params->group_size;
12487
12488 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12489 return FALSE;
12490
12491 #define STUB_SHRINK_ITER 20
12492 /* Loop until no stubs added. After iteration 20 of this loop we may
12493 exit on a stub section shrinking. This is to break out of a
12494 pathological case where adding stubs on one iteration decreases
12495 section gaps (perhaps due to alignment), which then requires
12496 fewer or smaller stubs on the next iteration. */
12497
12498 while (1)
12499 {
12500 bfd *input_bfd;
12501 unsigned int bfd_indx;
12502 struct map_stub *group;
12503
12504 htab->stub_iteration += 1;
12505
12506 for (input_bfd = info->input_bfds, bfd_indx = 0;
12507 input_bfd != NULL;
12508 input_bfd = input_bfd->link.next, bfd_indx++)
12509 {
12510 Elf_Internal_Shdr *symtab_hdr;
12511 asection *section;
12512 Elf_Internal_Sym *local_syms = NULL;
12513
12514 if (!is_ppc64_elf (input_bfd))
12515 continue;
12516
12517 /* We'll need the symbol table in a second. */
12518 symtab_hdr = &elf_symtab_hdr (input_bfd);
12519 if (symtab_hdr->sh_info == 0)
12520 continue;
12521
12522 /* Walk over each section attached to the input bfd. */
12523 for (section = input_bfd->sections;
12524 section != NULL;
12525 section = section->next)
12526 {
12527 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12528
12529 /* If there aren't any relocs, then there's nothing more
12530 to do. */
12531 if ((section->flags & SEC_RELOC) == 0
12532 || (section->flags & SEC_ALLOC) == 0
12533 || (section->flags & SEC_LOAD) == 0
12534 || (section->flags & SEC_CODE) == 0
12535 || section->reloc_count == 0)
12536 continue;
12537
12538 /* If this section is a link-once section that will be
12539 discarded, then don't create any stubs. */
12540 if (section->output_section == NULL
12541 || section->output_section->owner != info->output_bfd)
12542 continue;
12543
12544 /* Get the relocs. */
12545 internal_relocs
12546 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12547 info->keep_memory);
12548 if (internal_relocs == NULL)
12549 goto error_ret_free_local;
12550
12551 /* Now examine each relocation. */
12552 irela = internal_relocs;
12553 irelaend = irela + section->reloc_count;
12554 for (; irela < irelaend; irela++)
12555 {
12556 enum elf_ppc64_reloc_type r_type;
12557 unsigned int r_indx;
12558 enum ppc_stub_type stub_type;
12559 struct ppc_stub_hash_entry *stub_entry;
12560 asection *sym_sec, *code_sec;
12561 bfd_vma sym_value, code_value;
12562 bfd_vma destination;
12563 unsigned long local_off;
12564 bfd_boolean ok_dest;
12565 struct ppc_link_hash_entry *hash;
12566 struct ppc_link_hash_entry *fdh;
12567 struct elf_link_hash_entry *h;
12568 Elf_Internal_Sym *sym;
12569 char *stub_name;
12570 const asection *id_sec;
12571 struct _opd_sec_data *opd;
12572 struct plt_entry *plt_ent;
12573
12574 r_type = ELF64_R_TYPE (irela->r_info);
12575 r_indx = ELF64_R_SYM (irela->r_info);
12576
12577 if (r_type >= R_PPC64_max)
12578 {
12579 bfd_set_error (bfd_error_bad_value);
12580 goto error_ret_free_internal;
12581 }
12582
12583 /* Only look for stubs on branch instructions. */
12584 if (r_type != R_PPC64_REL24
12585 && r_type != R_PPC64_REL14
12586 && r_type != R_PPC64_REL14_BRTAKEN
12587 && r_type != R_PPC64_REL14_BRNTAKEN)
12588 continue;
12589
12590 /* Now determine the call target, its name, value,
12591 section. */
12592 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12593 r_indx, input_bfd))
12594 goto error_ret_free_internal;
12595 hash = (struct ppc_link_hash_entry *) h;
12596
12597 ok_dest = FALSE;
12598 fdh = NULL;
12599 sym_value = 0;
12600 if (hash == NULL)
12601 {
12602 sym_value = sym->st_value;
12603 if (sym_sec != NULL
12604 && sym_sec->output_section != NULL)
12605 ok_dest = TRUE;
12606 }
12607 else if (hash->elf.root.type == bfd_link_hash_defined
12608 || hash->elf.root.type == bfd_link_hash_defweak)
12609 {
12610 sym_value = hash->elf.root.u.def.value;
12611 if (sym_sec->output_section != NULL)
12612 ok_dest = TRUE;
12613 }
12614 else if (hash->elf.root.type == bfd_link_hash_undefweak
12615 || hash->elf.root.type == bfd_link_hash_undefined)
12616 {
12617 /* Recognise an old ABI func code entry sym, and
12618 use the func descriptor sym instead if it is
12619 defined. */
12620 if (hash->elf.root.root.string[0] == '.'
12621 && hash->oh != NULL)
12622 {
12623 fdh = ppc_follow_link (hash->oh);
12624 if (fdh->elf.root.type == bfd_link_hash_defined
12625 || fdh->elf.root.type == bfd_link_hash_defweak)
12626 {
12627 sym_sec = fdh->elf.root.u.def.section;
12628 sym_value = fdh->elf.root.u.def.value;
12629 if (sym_sec->output_section != NULL)
12630 ok_dest = TRUE;
12631 }
12632 else
12633 fdh = NULL;
12634 }
12635 }
12636 else
12637 {
12638 bfd_set_error (bfd_error_bad_value);
12639 goto error_ret_free_internal;
12640 }
12641
12642 destination = 0;
12643 local_off = 0;
12644 if (ok_dest)
12645 {
12646 sym_value += irela->r_addend;
12647 destination = (sym_value
12648 + sym_sec->output_offset
12649 + sym_sec->output_section->vma);
12650 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12651 ? hash->elf.other
12652 : sym->st_other);
12653 }
12654
12655 code_sec = sym_sec;
12656 code_value = sym_value;
12657 opd = get_opd_info (sym_sec);
12658 if (opd != NULL)
12659 {
12660 bfd_vma dest;
12661
12662 if (hash == NULL && opd->adjust != NULL)
12663 {
12664 long adjust = opd->adjust[OPD_NDX (sym_value)];
12665 if (adjust == -1)
12666 continue;
12667 code_value += adjust;
12668 sym_value += adjust;
12669 }
12670 dest = opd_entry_value (sym_sec, sym_value,
12671 &code_sec, &code_value, FALSE);
12672 if (dest != (bfd_vma) -1)
12673 {
12674 destination = dest;
12675 if (fdh != NULL)
12676 {
12677 /* Fixup old ABI sym to point at code
12678 entry. */
12679 hash->elf.root.type = bfd_link_hash_defweak;
12680 hash->elf.root.u.def.section = code_sec;
12681 hash->elf.root.u.def.value = code_value;
12682 }
12683 }
12684 }
12685
12686 /* Determine what (if any) linker stub is needed. */
12687 plt_ent = NULL;
12688 stub_type = ppc_type_of_stub (section, irela, &hash,
12689 &plt_ent, destination,
12690 local_off);
12691
12692 if (stub_type != ppc_stub_plt_call)
12693 {
12694 /* Check whether we need a TOC adjusting stub.
12695 Since the linker pastes together pieces from
12696 different object files when creating the
12697 _init and _fini functions, it may be that a
12698 call to what looks like a local sym is in
12699 fact a call needing a TOC adjustment. */
12700 if (code_sec != NULL
12701 && code_sec->output_section != NULL
12702 && (htab->sec_info[code_sec->id].toc_off
12703 != htab->sec_info[section->id].toc_off)
12704 && (code_sec->has_toc_reloc
12705 || code_sec->makes_toc_func_call))
12706 stub_type = ppc_stub_long_branch_r2off;
12707 }
12708
12709 if (stub_type == ppc_stub_none)
12710 continue;
12711
12712 /* __tls_get_addr calls might be eliminated. */
12713 if (stub_type != ppc_stub_plt_call
12714 && hash != NULL
12715 && (hash == htab->tls_get_addr
12716 || hash == htab->tls_get_addr_fd)
12717 && section->has_tls_reloc
12718 && irela != internal_relocs)
12719 {
12720 /* Get tls info. */
12721 unsigned char *tls_mask;
12722
12723 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12724 irela - 1, input_bfd))
12725 goto error_ret_free_internal;
12726 if (*tls_mask != 0)
12727 continue;
12728 }
12729
12730 if (stub_type == ppc_stub_plt_call)
12731 {
12732 if (!htab->opd_abi
12733 && htab->params->plt_localentry0 != 0
12734 && is_elfv2_localentry0 (&hash->elf))
12735 htab->has_plt_localentry0 = 1;
12736 else if (irela + 1 < irelaend
12737 && irela[1].r_offset == irela->r_offset + 4
12738 && (ELF64_R_TYPE (irela[1].r_info)
12739 == R_PPC64_TOCSAVE))
12740 {
12741 if (!tocsave_find (htab, INSERT,
12742 &local_syms, irela + 1, input_bfd))
12743 goto error_ret_free_internal;
12744 }
12745 else
12746 stub_type = ppc_stub_plt_call_r2save;
12747 }
12748
12749 /* Support for grouping stub sections. */
12750 id_sec = htab->sec_info[section->id].u.group->link_sec;
12751
12752 /* Get the name of this stub. */
12753 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12754 if (!stub_name)
12755 goto error_ret_free_internal;
12756
12757 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12758 stub_name, FALSE, FALSE);
12759 if (stub_entry != NULL)
12760 {
12761 /* The proper stub has already been created. */
12762 free (stub_name);
12763 if (stub_type == ppc_stub_plt_call_r2save)
12764 stub_entry->stub_type = stub_type;
12765 continue;
12766 }
12767
12768 stub_entry = ppc_add_stub (stub_name, section, info);
12769 if (stub_entry == NULL)
12770 {
12771 free (stub_name);
12772 error_ret_free_internal:
12773 if (elf_section_data (section)->relocs == NULL)
12774 free (internal_relocs);
12775 error_ret_free_local:
12776 if (local_syms != NULL
12777 && (symtab_hdr->contents
12778 != (unsigned char *) local_syms))
12779 free (local_syms);
12780 return FALSE;
12781 }
12782
12783 stub_entry->stub_type = stub_type;
12784 if (stub_type != ppc_stub_plt_call
12785 && stub_type != ppc_stub_plt_call_r2save)
12786 {
12787 stub_entry->target_value = code_value;
12788 stub_entry->target_section = code_sec;
12789 }
12790 else
12791 {
12792 stub_entry->target_value = sym_value;
12793 stub_entry->target_section = sym_sec;
12794 }
12795 stub_entry->h = hash;
12796 stub_entry->plt_ent = plt_ent;
12797 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12798
12799 if (stub_entry->h != NULL)
12800 htab->stub_globals += 1;
12801 }
12802
12803 /* We're done with the internal relocs, free them. */
12804 if (elf_section_data (section)->relocs != internal_relocs)
12805 free (internal_relocs);
12806 }
12807
12808 if (local_syms != NULL
12809 && symtab_hdr->contents != (unsigned char *) local_syms)
12810 {
12811 if (!info->keep_memory)
12812 free (local_syms);
12813 else
12814 symtab_hdr->contents = (unsigned char *) local_syms;
12815 }
12816 }
12817
12818 /* We may have added some stubs. Find out the new size of the
12819 stub sections. */
12820 for (group = htab->group; group != NULL; group = group->next)
12821 if (group->stub_sec != NULL)
12822 {
12823 asection *stub_sec = group->stub_sec;
12824
12825 if (htab->stub_iteration <= STUB_SHRINK_ITER
12826 || stub_sec->rawsize < stub_sec->size)
12827 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12828 stub_sec->rawsize = stub_sec->size;
12829 stub_sec->size = 0;
12830 stub_sec->reloc_count = 0;
12831 stub_sec->flags &= ~SEC_RELOC;
12832 }
12833
12834 htab->brlt->size = 0;
12835 htab->brlt->reloc_count = 0;
12836 htab->brlt->flags &= ~SEC_RELOC;
12837 if (htab->relbrlt != NULL)
12838 htab->relbrlt->size = 0;
12839
12840 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12841
12842 for (group = htab->group; group != NULL; group = group->next)
12843 if (group->needs_save_res)
12844 group->stub_sec->size += htab->sfpr->size;
12845
12846 if (info->emitrelocations
12847 && htab->glink != NULL && htab->glink->size != 0)
12848 {
12849 htab->glink->reloc_count = 1;
12850 htab->glink->flags |= SEC_RELOC;
12851 }
12852
12853 if (htab->glink_eh_frame != NULL
12854 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12855 && htab->glink_eh_frame->output_section->size != 0)
12856 {
12857 size_t size = 0, align = 4;
12858
12859 for (group = htab->group; group != NULL; group = group->next)
12860 if (group->stub_sec != NULL)
12861 size += stub_eh_frame_size (group, align);
12862 if (htab->glink != NULL && htab->glink->size != 0)
12863 size += (24 + align - 1) & -align;
12864 if (size != 0)
12865 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12866 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12867 size = (size + align - 1) & -align;
12868 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12869 htab->glink_eh_frame->size = size;
12870 }
12871
12872 if (htab->params->plt_stub_align != 0)
12873 for (group = htab->group; group != NULL; group = group->next)
12874 if (group->stub_sec != NULL)
12875 group->stub_sec->size = ((group->stub_sec->size
12876 + (1 << htab->params->plt_stub_align) - 1)
12877 & -(1 << htab->params->plt_stub_align));
12878
12879 for (group = htab->group; group != NULL; group = group->next)
12880 if (group->stub_sec != NULL
12881 && group->stub_sec->rawsize != group->stub_sec->size
12882 && (htab->stub_iteration <= STUB_SHRINK_ITER
12883 || group->stub_sec->rawsize < group->stub_sec->size))
12884 break;
12885
12886 if (group == NULL
12887 && (htab->glink_eh_frame == NULL
12888 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12889 break;
12890
12891 /* Ask the linker to do its stuff. */
12892 (*htab->params->layout_sections_again) ();
12893 }
12894
12895 if (htab->glink_eh_frame != NULL
12896 && htab->glink_eh_frame->size != 0)
12897 {
12898 bfd_vma val;
12899 bfd_byte *p, *last_fde;
12900 size_t last_fde_len, size, align, pad;
12901 struct map_stub *group;
12902
12903 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12904 if (p == NULL)
12905 return FALSE;
12906 htab->glink_eh_frame->contents = p;
12907 last_fde = p;
12908 align = 4;
12909
12910 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12911 /* CIE length (rewrite in case little-endian). */
12912 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12913 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12914 p += last_fde_len + 4;
12915
12916 for (group = htab->group; group != NULL; group = group->next)
12917 if (group->stub_sec != NULL)
12918 {
12919 last_fde = p;
12920 last_fde_len = stub_eh_frame_size (group, align) - 4;
12921 /* FDE length. */
12922 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12923 p += 4;
12924 /* CIE pointer. */
12925 val = p - htab->glink_eh_frame->contents;
12926 bfd_put_32 (htab->elf.dynobj, val, p);
12927 p += 4;
12928 /* Offset to stub section, written later. */
12929 p += 4;
12930 /* stub section size. */
12931 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12932 p += 4;
12933 /* Augmentation. */
12934 p += 1;
12935 if (group->tls_get_addr_opt_bctrl != -1u)
12936 {
12937 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12938
12939 /* This FDE needs more than just the default.
12940 Describe __tls_get_addr_opt stub LR. */
12941 if (to_bctrl < 64)
12942 *p++ = DW_CFA_advance_loc + to_bctrl;
12943 else if (to_bctrl < 256)
12944 {
12945 *p++ = DW_CFA_advance_loc1;
12946 *p++ = to_bctrl;
12947 }
12948 else if (to_bctrl < 65536)
12949 {
12950 *p++ = DW_CFA_advance_loc2;
12951 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12952 p += 2;
12953 }
12954 else
12955 {
12956 *p++ = DW_CFA_advance_loc4;
12957 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12958 p += 4;
12959 }
12960 *p++ = DW_CFA_offset_extended_sf;
12961 *p++ = 65;
12962 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12963 *p++ = DW_CFA_advance_loc + 4;
12964 *p++ = DW_CFA_restore_extended;
12965 *p++ = 65;
12966 }
12967 /* Pad. */
12968 p = last_fde + last_fde_len + 4;
12969 }
12970 if (htab->glink != NULL && htab->glink->size != 0)
12971 {
12972 last_fde = p;
12973 last_fde_len = ((24 + align - 1) & -align) - 4;
12974 /* FDE length. */
12975 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12976 p += 4;
12977 /* CIE pointer. */
12978 val = p - htab->glink_eh_frame->contents;
12979 bfd_put_32 (htab->elf.dynobj, val, p);
12980 p += 4;
12981 /* Offset to .glink, written later. */
12982 p += 4;
12983 /* .glink size. */
12984 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12985 p += 4;
12986 /* Augmentation. */
12987 p += 1;
12988
12989 *p++ = DW_CFA_advance_loc + 1;
12990 *p++ = DW_CFA_register;
12991 *p++ = 65;
12992 *p++ = htab->opd_abi ? 12 : 0;
12993 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12994 *p++ = DW_CFA_restore_extended;
12995 *p++ = 65;
12996 p += ((24 + align - 1) & -align) - 24;
12997 }
12998 /* Subsume any padding into the last FDE if user .eh_frame
12999 sections are aligned more than glink_eh_frame. Otherwise any
13000 zero padding will be seen as a terminator. */
13001 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
13002 size = p - htab->glink_eh_frame->contents;
13003 pad = ((size + align - 1) & -align) - size;
13004 htab->glink_eh_frame->size = size + pad;
13005 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
13006 }
13007
13008 maybe_strip_output (info, htab->brlt);
13009 if (htab->glink_eh_frame != NULL)
13010 maybe_strip_output (info, htab->glink_eh_frame);
13011
13012 return TRUE;
13013 }
13014
13015 /* Called after we have determined section placement. If sections
13016 move, we'll be called again. Provide a value for TOCstart. */
13017
13018 bfd_vma
13019 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
13020 {
13021 asection *s;
13022 bfd_vma TOCstart, adjust;
13023
13024 if (info != NULL)
13025 {
13026 struct elf_link_hash_entry *h;
13027 struct elf_link_hash_table *htab = elf_hash_table (info);
13028
13029 if (is_elf_hash_table (htab)
13030 && htab->hgot != NULL)
13031 h = htab->hgot;
13032 else
13033 {
13034 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
13035 if (is_elf_hash_table (htab))
13036 htab->hgot = h;
13037 }
13038 if (h != NULL
13039 && h->root.type == bfd_link_hash_defined
13040 && !h->root.linker_def
13041 && (!is_elf_hash_table (htab)
13042 || h->def_regular))
13043 {
13044 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
13045 + h->root.u.def.section->output_offset
13046 + h->root.u.def.section->output_section->vma);
13047 _bfd_set_gp_value (obfd, TOCstart);
13048 return TOCstart;
13049 }
13050 }
13051
13052 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
13053 order. The TOC starts where the first of these sections starts. */
13054 s = bfd_get_section_by_name (obfd, ".got");
13055 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13056 s = bfd_get_section_by_name (obfd, ".toc");
13057 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13058 s = bfd_get_section_by_name (obfd, ".tocbss");
13059 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13060 s = bfd_get_section_by_name (obfd, ".plt");
13061 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13062 {
13063 /* This may happen for
13064 o references to TOC base (SYM@toc / TOC[tc0]) without a
13065 .toc directive
13066 o bad linker script
13067 o --gc-sections and empty TOC sections
13068
13069 FIXME: Warn user? */
13070
13071 /* Look for a likely section. We probably won't even be
13072 using TOCstart. */
13073 for (s = obfd->sections; s != NULL; s = s->next)
13074 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13075 | SEC_EXCLUDE))
13076 == (SEC_ALLOC | SEC_SMALL_DATA))
13077 break;
13078 if (s == NULL)
13079 for (s = obfd->sections; s != NULL; s = s->next)
13080 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13081 == (SEC_ALLOC | SEC_SMALL_DATA))
13082 break;
13083 if (s == NULL)
13084 for (s = obfd->sections; s != NULL; s = s->next)
13085 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13086 == SEC_ALLOC)
13087 break;
13088 if (s == NULL)
13089 for (s = obfd->sections; s != NULL; s = s->next)
13090 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13091 break;
13092 }
13093
13094 TOCstart = 0;
13095 if (s != NULL)
13096 TOCstart = s->output_section->vma + s->output_offset;
13097
13098 /* Force alignment. */
13099 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13100 TOCstart -= adjust;
13101 _bfd_set_gp_value (obfd, TOCstart);
13102
13103 if (info != NULL && s != NULL)
13104 {
13105 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13106
13107 if (htab != NULL)
13108 {
13109 if (htab->elf.hgot != NULL)
13110 {
13111 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13112 htab->elf.hgot->root.u.def.section = s;
13113 }
13114 }
13115 else
13116 {
13117 struct bfd_link_hash_entry *bh = NULL;
13118 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13119 s, TOC_BASE_OFF - adjust,
13120 NULL, FALSE, FALSE, &bh);
13121 }
13122 }
13123 return TOCstart;
13124 }
13125
13126 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13127 write out any global entry stubs. */
13128
13129 static bfd_boolean
13130 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13131 {
13132 struct bfd_link_info *info;
13133 struct ppc_link_hash_table *htab;
13134 struct plt_entry *pent;
13135 asection *s;
13136
13137 if (h->root.type == bfd_link_hash_indirect)
13138 return TRUE;
13139
13140 if (!h->pointer_equality_needed)
13141 return TRUE;
13142
13143 if (h->def_regular)
13144 return TRUE;
13145
13146 info = inf;
13147 htab = ppc_hash_table (info);
13148 if (htab == NULL)
13149 return FALSE;
13150
13151 s = htab->glink;
13152 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13153 if (pent->plt.offset != (bfd_vma) -1
13154 && pent->addend == 0)
13155 {
13156 bfd_byte *p;
13157 asection *plt;
13158 bfd_vma off;
13159
13160 p = s->contents + h->root.u.def.value;
13161 plt = htab->elf.splt;
13162 if (!htab->elf.dynamic_sections_created
13163 || h->dynindx == -1)
13164 plt = htab->elf.iplt;
13165 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13166 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13167
13168 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13169 {
13170 info->callbacks->einfo
13171 (_("%P: linkage table error against `%T'\n"),
13172 h->root.root.string);
13173 bfd_set_error (bfd_error_bad_value);
13174 htab->stub_error = TRUE;
13175 }
13176
13177 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13178 if (htab->params->emit_stub_syms)
13179 {
13180 size_t len = strlen (h->root.root.string);
13181 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13182
13183 if (name == NULL)
13184 return FALSE;
13185
13186 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13187 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13188 if (h == NULL)
13189 return FALSE;
13190 if (h->root.type == bfd_link_hash_new)
13191 {
13192 h->root.type = bfd_link_hash_defined;
13193 h->root.u.def.section = s;
13194 h->root.u.def.value = p - s->contents;
13195 h->ref_regular = 1;
13196 h->def_regular = 1;
13197 h->ref_regular_nonweak = 1;
13198 h->forced_local = 1;
13199 h->non_elf = 0;
13200 h->root.linker_def = 1;
13201 }
13202 }
13203
13204 if (PPC_HA (off) != 0)
13205 {
13206 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13207 p += 4;
13208 }
13209 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13210 p += 4;
13211 bfd_put_32 (s->owner, MTCTR_R12, p);
13212 p += 4;
13213 bfd_put_32 (s->owner, BCTR, p);
13214 break;
13215 }
13216 return TRUE;
13217 }
13218
13219 /* Build all the stubs associated with the current output file.
13220 The stubs are kept in a hash table attached to the main linker
13221 hash table. This function is called via gldelf64ppc_finish. */
13222
13223 bfd_boolean
13224 ppc64_elf_build_stubs (struct bfd_link_info *info,
13225 char **stats)
13226 {
13227 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13228 struct map_stub *group;
13229 asection *stub_sec;
13230 bfd_byte *p;
13231 int stub_sec_count = 0;
13232
13233 if (htab == NULL)
13234 return FALSE;
13235
13236 /* Allocate memory to hold the linker stubs. */
13237 for (group = htab->group; group != NULL; group = group->next)
13238 if ((stub_sec = group->stub_sec) != NULL
13239 && stub_sec->size != 0)
13240 {
13241 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13242 if (stub_sec->contents == NULL)
13243 return FALSE;
13244 stub_sec->size = 0;
13245 }
13246
13247 if (htab->glink != NULL && htab->glink->size != 0)
13248 {
13249 unsigned int indx;
13250 bfd_vma plt0;
13251
13252 /* Build the .glink plt call stub. */
13253 if (htab->params->emit_stub_syms)
13254 {
13255 struct elf_link_hash_entry *h;
13256 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13257 TRUE, FALSE, FALSE);
13258 if (h == NULL)
13259 return FALSE;
13260 if (h->root.type == bfd_link_hash_new)
13261 {
13262 h->root.type = bfd_link_hash_defined;
13263 h->root.u.def.section = htab->glink;
13264 h->root.u.def.value = 8;
13265 h->ref_regular = 1;
13266 h->def_regular = 1;
13267 h->ref_regular_nonweak = 1;
13268 h->forced_local = 1;
13269 h->non_elf = 0;
13270 h->root.linker_def = 1;
13271 }
13272 }
13273 plt0 = (htab->elf.splt->output_section->vma
13274 + htab->elf.splt->output_offset
13275 - 16);
13276 if (info->emitrelocations)
13277 {
13278 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13279 if (r == NULL)
13280 return FALSE;
13281 r->r_offset = (htab->glink->output_offset
13282 + htab->glink->output_section->vma);
13283 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13284 r->r_addend = plt0;
13285 }
13286 p = htab->glink->contents;
13287 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13288 bfd_put_64 (htab->glink->owner, plt0, p);
13289 p += 8;
13290 if (htab->opd_abi)
13291 {
13292 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13293 p += 4;
13294 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13295 p += 4;
13296 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13297 p += 4;
13298 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13299 p += 4;
13300 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13301 p += 4;
13302 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13303 p += 4;
13304 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13305 p += 4;
13306 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13307 p += 4;
13308 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13309 p += 4;
13310 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13311 p += 4;
13312 }
13313 else
13314 {
13315 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13316 p += 4;
13317 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13318 p += 4;
13319 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13320 p += 4;
13321 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13322 p += 4;
13323 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13324 p += 4;
13325 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13326 p += 4;
13327 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13328 p += 4;
13329 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13330 p += 4;
13331 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13332 p += 4;
13333 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13334 p += 4;
13335 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13336 p += 4;
13337 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13338 p += 4;
13339 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13340 p += 4;
13341 }
13342 bfd_put_32 (htab->glink->owner, BCTR, p);
13343 p += 4;
13344 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13345 {
13346 bfd_put_32 (htab->glink->owner, NOP, p);
13347 p += 4;
13348 }
13349
13350 /* Build the .glink lazy link call stubs. */
13351 indx = 0;
13352 while (p < htab->glink->contents + htab->glink->rawsize)
13353 {
13354 if (htab->opd_abi)
13355 {
13356 if (indx < 0x8000)
13357 {
13358 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13359 p += 4;
13360 }
13361 else
13362 {
13363 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13364 p += 4;
13365 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13366 p);
13367 p += 4;
13368 }
13369 }
13370 bfd_put_32 (htab->glink->owner,
13371 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13372 indx++;
13373 p += 4;
13374 }
13375
13376 /* Build .glink global entry stubs. */
13377 if (htab->glink->size > htab->glink->rawsize)
13378 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13379 }
13380
13381 if (htab->brlt != NULL && htab->brlt->size != 0)
13382 {
13383 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13384 htab->brlt->size);
13385 if (htab->brlt->contents == NULL)
13386 return FALSE;
13387 }
13388 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13389 {
13390 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13391 htab->relbrlt->size);
13392 if (htab->relbrlt->contents == NULL)
13393 return FALSE;
13394 }
13395
13396 /* Build the stubs as directed by the stub hash table. */
13397 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13398
13399 for (group = htab->group; group != NULL; group = group->next)
13400 if (group->needs_save_res)
13401 {
13402 stub_sec = group->stub_sec;
13403 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13404 htab->sfpr->size);
13405 if (htab->params->emit_stub_syms)
13406 {
13407 unsigned int i;
13408
13409 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13410 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13411 return FALSE;
13412 }
13413 stub_sec->size += htab->sfpr->size;
13414 }
13415
13416 if (htab->relbrlt != NULL)
13417 htab->relbrlt->reloc_count = 0;
13418
13419 if (htab->params->plt_stub_align != 0)
13420 for (group = htab->group; group != NULL; group = group->next)
13421 if ((stub_sec = group->stub_sec) != NULL)
13422 stub_sec->size = ((stub_sec->size
13423 + (1 << htab->params->plt_stub_align) - 1)
13424 & -(1 << htab->params->plt_stub_align));
13425
13426 for (group = htab->group; group != NULL; group = group->next)
13427 if ((stub_sec = group->stub_sec) != NULL)
13428 {
13429 stub_sec_count += 1;
13430 if (stub_sec->rawsize != stub_sec->size
13431 && (htab->stub_iteration <= STUB_SHRINK_ITER
13432 || stub_sec->rawsize < stub_sec->size))
13433 break;
13434 }
13435
13436 if (group != NULL)
13437 {
13438 htab->stub_error = TRUE;
13439 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13440 }
13441
13442 if (htab->stub_error)
13443 return FALSE;
13444
13445 if (stats != NULL)
13446 {
13447 *stats = bfd_malloc (500);
13448 if (*stats == NULL)
13449 return FALSE;
13450
13451 sprintf (*stats, _("linker stubs in %u group%s\n"
13452 " branch %lu\n"
13453 " toc adjust %lu\n"
13454 " long branch %lu\n"
13455 " long toc adj %lu\n"
13456 " plt call %lu\n"
13457 " plt call toc %lu\n"
13458 " global entry %lu"),
13459 stub_sec_count,
13460 stub_sec_count == 1 ? "" : "s",
13461 htab->stub_count[ppc_stub_long_branch - 1],
13462 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13463 htab->stub_count[ppc_stub_plt_branch - 1],
13464 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13465 htab->stub_count[ppc_stub_plt_call - 1],
13466 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13467 htab->stub_count[ppc_stub_global_entry - 1]);
13468 }
13469 return TRUE;
13470 }
13471
13472 /* What to do when ld finds relocations against symbols defined in
13473 discarded sections. */
13474
13475 static unsigned int
13476 ppc64_elf_action_discarded (asection *sec)
13477 {
13478 if (strcmp (".opd", sec->name) == 0)
13479 return 0;
13480
13481 if (strcmp (".toc", sec->name) == 0)
13482 return 0;
13483
13484 if (strcmp (".toc1", sec->name) == 0)
13485 return 0;
13486
13487 return _bfd_elf_default_action_discarded (sec);
13488 }
13489
13490 /* The RELOCATE_SECTION function is called by the ELF backend linker
13491 to handle the relocations for a section.
13492
13493 The relocs are always passed as Rela structures; if the section
13494 actually uses Rel structures, the r_addend field will always be
13495 zero.
13496
13497 This function is responsible for adjust the section contents as
13498 necessary, and (if using Rela relocs and generating a
13499 relocatable output file) adjusting the reloc addend as
13500 necessary.
13501
13502 This function does not have to worry about setting the reloc
13503 address or the reloc symbol index.
13504
13505 LOCAL_SYMS is a pointer to the swapped in local symbols.
13506
13507 LOCAL_SECTIONS is an array giving the section in the input file
13508 corresponding to the st_shndx field of each local symbol.
13509
13510 The global hash table entry for the global symbols can be found
13511 via elf_sym_hashes (input_bfd).
13512
13513 When generating relocatable output, this function must handle
13514 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13515 going to be the section symbol corresponding to the output
13516 section, which means that the addend must be adjusted
13517 accordingly. */
13518
13519 static bfd_boolean
13520 ppc64_elf_relocate_section (bfd *output_bfd,
13521 struct bfd_link_info *info,
13522 bfd *input_bfd,
13523 asection *input_section,
13524 bfd_byte *contents,
13525 Elf_Internal_Rela *relocs,
13526 Elf_Internal_Sym *local_syms,
13527 asection **local_sections)
13528 {
13529 struct ppc_link_hash_table *htab;
13530 Elf_Internal_Shdr *symtab_hdr;
13531 struct elf_link_hash_entry **sym_hashes;
13532 Elf_Internal_Rela *rel;
13533 Elf_Internal_Rela *wrel;
13534 Elf_Internal_Rela *relend;
13535 Elf_Internal_Rela outrel;
13536 bfd_byte *loc;
13537 struct got_entry **local_got_ents;
13538 bfd_vma TOCstart;
13539 bfd_boolean ret = TRUE;
13540 bfd_boolean is_opd;
13541 /* Assume 'at' branch hints. */
13542 bfd_boolean is_isa_v2 = TRUE;
13543 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13544
13545 /* Initialize howto table if needed. */
13546 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13547 ppc_howto_init ();
13548
13549 htab = ppc_hash_table (info);
13550 if (htab == NULL)
13551 return FALSE;
13552
13553 /* Don't relocate stub sections. */
13554 if (input_section->owner == htab->params->stub_bfd)
13555 return TRUE;
13556
13557 BFD_ASSERT (is_ppc64_elf (input_bfd));
13558
13559 local_got_ents = elf_local_got_ents (input_bfd);
13560 TOCstart = elf_gp (output_bfd);
13561 symtab_hdr = &elf_symtab_hdr (input_bfd);
13562 sym_hashes = elf_sym_hashes (input_bfd);
13563 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13564
13565 rel = wrel = relocs;
13566 relend = relocs + input_section->reloc_count;
13567 for (; rel < relend; wrel++, rel++)
13568 {
13569 enum elf_ppc64_reloc_type r_type;
13570 bfd_vma addend;
13571 bfd_reloc_status_type r;
13572 Elf_Internal_Sym *sym;
13573 asection *sec;
13574 struct elf_link_hash_entry *h_elf;
13575 struct ppc_link_hash_entry *h;
13576 struct ppc_link_hash_entry *fdh;
13577 const char *sym_name;
13578 unsigned long r_symndx, toc_symndx;
13579 bfd_vma toc_addend;
13580 unsigned char tls_mask, tls_gd, tls_type;
13581 unsigned char sym_type;
13582 bfd_vma relocation;
13583 bfd_boolean unresolved_reloc;
13584 bfd_boolean warned;
13585 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13586 unsigned int insn;
13587 unsigned int mask;
13588 struct ppc_stub_hash_entry *stub_entry;
13589 bfd_vma max_br_offset;
13590 bfd_vma from;
13591 Elf_Internal_Rela orig_rel;
13592 reloc_howto_type *howto;
13593 struct reloc_howto_struct alt_howto;
13594
13595 again:
13596 orig_rel = *rel;
13597
13598 r_type = ELF64_R_TYPE (rel->r_info);
13599 r_symndx = ELF64_R_SYM (rel->r_info);
13600
13601 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13602 symbol of the previous ADDR64 reloc. The symbol gives us the
13603 proper TOC base to use. */
13604 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13605 && wrel != relocs
13606 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13607 && is_opd)
13608 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13609
13610 sym = NULL;
13611 sec = NULL;
13612 h_elf = NULL;
13613 sym_name = NULL;
13614 unresolved_reloc = FALSE;
13615 warned = FALSE;
13616
13617 if (r_symndx < symtab_hdr->sh_info)
13618 {
13619 /* It's a local symbol. */
13620 struct _opd_sec_data *opd;
13621
13622 sym = local_syms + r_symndx;
13623 sec = local_sections[r_symndx];
13624 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13625 sym_type = ELF64_ST_TYPE (sym->st_info);
13626 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13627 opd = get_opd_info (sec);
13628 if (opd != NULL && opd->adjust != NULL)
13629 {
13630 long adjust = opd->adjust[OPD_NDX (sym->st_value
13631 + rel->r_addend)];
13632 if (adjust == -1)
13633 relocation = 0;
13634 else
13635 {
13636 /* If this is a relocation against the opd section sym
13637 and we have edited .opd, adjust the reloc addend so
13638 that ld -r and ld --emit-relocs output is correct.
13639 If it is a reloc against some other .opd symbol,
13640 then the symbol value will be adjusted later. */
13641 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13642 rel->r_addend += adjust;
13643 else
13644 relocation += adjust;
13645 }
13646 }
13647 }
13648 else
13649 {
13650 bfd_boolean ignored;
13651
13652 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13653 r_symndx, symtab_hdr, sym_hashes,
13654 h_elf, sec, relocation,
13655 unresolved_reloc, warned, ignored);
13656 sym_name = h_elf->root.root.string;
13657 sym_type = h_elf->type;
13658 if (sec != NULL
13659 && sec->owner == output_bfd
13660 && strcmp (sec->name, ".opd") == 0)
13661 {
13662 /* This is a symbol defined in a linker script. All
13663 such are defined in output sections, even those
13664 defined by simple assignment from a symbol defined in
13665 an input section. Transfer the symbol to an
13666 appropriate input .opd section, so that a branch to
13667 this symbol will be mapped to the location specified
13668 by the opd entry. */
13669 struct bfd_link_order *lo;
13670 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13671 if (lo->type == bfd_indirect_link_order)
13672 {
13673 asection *isec = lo->u.indirect.section;
13674 if (h_elf->root.u.def.value >= isec->output_offset
13675 && h_elf->root.u.def.value < (isec->output_offset
13676 + isec->size))
13677 {
13678 h_elf->root.u.def.value -= isec->output_offset;
13679 h_elf->root.u.def.section = isec;
13680 sec = isec;
13681 break;
13682 }
13683 }
13684 }
13685 }
13686 h = (struct ppc_link_hash_entry *) h_elf;
13687
13688 if (sec != NULL && discarded_section (sec))
13689 {
13690 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13691 input_bfd, input_section,
13692 contents + rel->r_offset);
13693 wrel->r_offset = rel->r_offset;
13694 wrel->r_info = 0;
13695 wrel->r_addend = 0;
13696
13697 /* For ld -r, remove relocations in debug sections against
13698 symbols defined in discarded sections. Not done for
13699 non-debug to preserve relocs in .eh_frame which the
13700 eh_frame editing code expects to be present. */
13701 if (bfd_link_relocatable (info)
13702 && (input_section->flags & SEC_DEBUGGING))
13703 wrel--;
13704
13705 continue;
13706 }
13707
13708 if (bfd_link_relocatable (info))
13709 goto copy_reloc;
13710
13711 if (h != NULL && &h->elf == htab->elf.hgot)
13712 {
13713 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13714 sec = bfd_abs_section_ptr;
13715 unresolved_reloc = FALSE;
13716 }
13717
13718 /* TLS optimizations. Replace instruction sequences and relocs
13719 based on information we collected in tls_optimize. We edit
13720 RELOCS so that --emit-relocs will output something sensible
13721 for the final instruction stream. */
13722 tls_mask = 0;
13723 tls_gd = 0;
13724 toc_symndx = 0;
13725 if (h != NULL)
13726 tls_mask = h->tls_mask;
13727 else if (local_got_ents != NULL)
13728 {
13729 struct plt_entry **local_plt = (struct plt_entry **)
13730 (local_got_ents + symtab_hdr->sh_info);
13731 unsigned char *lgot_masks = (unsigned char *)
13732 (local_plt + symtab_hdr->sh_info);
13733 tls_mask = lgot_masks[r_symndx];
13734 }
13735 if (tls_mask == 0
13736 && (r_type == R_PPC64_TLS
13737 || r_type == R_PPC64_TLSGD
13738 || r_type == R_PPC64_TLSLD))
13739 {
13740 /* Check for toc tls entries. */
13741 unsigned char *toc_tls;
13742
13743 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13744 &local_syms, rel, input_bfd))
13745 return FALSE;
13746
13747 if (toc_tls)
13748 tls_mask = *toc_tls;
13749 }
13750
13751 /* Check that tls relocs are used with tls syms, and non-tls
13752 relocs are used with non-tls syms. */
13753 if (r_symndx != STN_UNDEF
13754 && r_type != R_PPC64_NONE
13755 && (h == NULL
13756 || h->elf.root.type == bfd_link_hash_defined
13757 || h->elf.root.type == bfd_link_hash_defweak)
13758 && (IS_PPC64_TLS_RELOC (r_type)
13759 != (sym_type == STT_TLS
13760 || (sym_type == STT_SECTION
13761 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13762 {
13763 if (tls_mask != 0
13764 && (r_type == R_PPC64_TLS
13765 || r_type == R_PPC64_TLSGD
13766 || r_type == R_PPC64_TLSLD))
13767 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13768 ;
13769 else
13770 info->callbacks->einfo
13771 (!IS_PPC64_TLS_RELOC (r_type)
13772 /* xgettext:c-format */
13773 ? _("%H: %s used with TLS symbol `%T'\n")
13774 /* xgettext:c-format */
13775 : _("%H: %s used with non-TLS symbol `%T'\n"),
13776 input_bfd, input_section, rel->r_offset,
13777 ppc64_elf_howto_table[r_type]->name,
13778 sym_name);
13779 }
13780
13781 /* Ensure reloc mapping code below stays sane. */
13782 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13783 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13784 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13785 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13786 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13787 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13788 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13789 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13790 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13791 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13792 abort ();
13793
13794 switch (r_type)
13795 {
13796 default:
13797 break;
13798
13799 case R_PPC64_LO_DS_OPT:
13800 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13801 if ((insn & (0x3f << 26)) != 58u << 26)
13802 abort ();
13803 insn += (14u << 26) - (58u << 26);
13804 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13805 r_type = R_PPC64_TOC16_LO;
13806 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13807 break;
13808
13809 case R_PPC64_TOC16:
13810 case R_PPC64_TOC16_LO:
13811 case R_PPC64_TOC16_DS:
13812 case R_PPC64_TOC16_LO_DS:
13813 {
13814 /* Check for toc tls entries. */
13815 unsigned char *toc_tls;
13816 int retval;
13817
13818 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13819 &local_syms, rel, input_bfd);
13820 if (retval == 0)
13821 return FALSE;
13822
13823 if (toc_tls)
13824 {
13825 tls_mask = *toc_tls;
13826 if (r_type == R_PPC64_TOC16_DS
13827 || r_type == R_PPC64_TOC16_LO_DS)
13828 {
13829 if (tls_mask != 0
13830 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13831 goto toctprel;
13832 }
13833 else
13834 {
13835 /* If we found a GD reloc pair, then we might be
13836 doing a GD->IE transition. */
13837 if (retval == 2)
13838 {
13839 tls_gd = TLS_TPRELGD;
13840 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13841 goto tls_ldgd_opt;
13842 }
13843 else if (retval == 3)
13844 {
13845 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13846 goto tls_ldgd_opt;
13847 }
13848 }
13849 }
13850 }
13851 break;
13852
13853 case R_PPC64_GOT_TPREL16_HI:
13854 case R_PPC64_GOT_TPREL16_HA:
13855 if (tls_mask != 0
13856 && (tls_mask & TLS_TPREL) == 0)
13857 {
13858 rel->r_offset -= d_offset;
13859 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13860 r_type = R_PPC64_NONE;
13861 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13862 }
13863 break;
13864
13865 case R_PPC64_GOT_TPREL16_DS:
13866 case R_PPC64_GOT_TPREL16_LO_DS:
13867 if (tls_mask != 0
13868 && (tls_mask & TLS_TPREL) == 0)
13869 {
13870 toctprel:
13871 insn = bfd_get_32 (input_bfd,
13872 contents + rel->r_offset - d_offset);
13873 insn &= 31 << 21;
13874 insn |= 0x3c0d0000; /* addis 0,13,0 */
13875 bfd_put_32 (input_bfd, insn,
13876 contents + rel->r_offset - d_offset);
13877 r_type = R_PPC64_TPREL16_HA;
13878 if (toc_symndx != 0)
13879 {
13880 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13881 rel->r_addend = toc_addend;
13882 /* We changed the symbol. Start over in order to
13883 get h, sym, sec etc. right. */
13884 goto again;
13885 }
13886 else
13887 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13888 }
13889 break;
13890
13891 case R_PPC64_TLS:
13892 if (tls_mask != 0
13893 && (tls_mask & TLS_TPREL) == 0)
13894 {
13895 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13896 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13897 if (insn == 0)
13898 abort ();
13899 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13900 /* Was PPC64_TLS which sits on insn boundary, now
13901 PPC64_TPREL16_LO which is at low-order half-word. */
13902 rel->r_offset += d_offset;
13903 r_type = R_PPC64_TPREL16_LO;
13904 if (toc_symndx != 0)
13905 {
13906 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13907 rel->r_addend = toc_addend;
13908 /* We changed the symbol. Start over in order to
13909 get h, sym, sec etc. right. */
13910 goto again;
13911 }
13912 else
13913 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13914 }
13915 break;
13916
13917 case R_PPC64_GOT_TLSGD16_HI:
13918 case R_PPC64_GOT_TLSGD16_HA:
13919 tls_gd = TLS_TPRELGD;
13920 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13921 goto tls_gdld_hi;
13922 break;
13923
13924 case R_PPC64_GOT_TLSLD16_HI:
13925 case R_PPC64_GOT_TLSLD16_HA:
13926 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13927 {
13928 tls_gdld_hi:
13929 if ((tls_mask & tls_gd) != 0)
13930 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13931 + R_PPC64_GOT_TPREL16_DS);
13932 else
13933 {
13934 rel->r_offset -= d_offset;
13935 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13936 r_type = R_PPC64_NONE;
13937 }
13938 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13939 }
13940 break;
13941
13942 case R_PPC64_GOT_TLSGD16:
13943 case R_PPC64_GOT_TLSGD16_LO:
13944 tls_gd = TLS_TPRELGD;
13945 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13946 goto tls_ldgd_opt;
13947 break;
13948
13949 case R_PPC64_GOT_TLSLD16:
13950 case R_PPC64_GOT_TLSLD16_LO:
13951 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13952 {
13953 unsigned int insn1, insn2;
13954 bfd_vma offset;
13955
13956 tls_ldgd_opt:
13957 offset = (bfd_vma) -1;
13958 /* If not using the newer R_PPC64_TLSGD/LD to mark
13959 __tls_get_addr calls, we must trust that the call
13960 stays with its arg setup insns, ie. that the next
13961 reloc is the __tls_get_addr call associated with
13962 the current reloc. Edit both insns. */
13963 if (input_section->has_tls_get_addr_call
13964 && rel + 1 < relend
13965 && branch_reloc_hash_match (input_bfd, rel + 1,
13966 htab->tls_get_addr,
13967 htab->tls_get_addr_fd))
13968 offset = rel[1].r_offset;
13969 /* We read the low GOT_TLS (or TOC16) insn because we
13970 need to keep the destination reg. It may be
13971 something other than the usual r3, and moved to r3
13972 before the call by intervening code. */
13973 insn1 = bfd_get_32 (input_bfd,
13974 contents + rel->r_offset - d_offset);
13975 if ((tls_mask & tls_gd) != 0)
13976 {
13977 /* IE */
13978 insn1 &= (0x1f << 21) | (0x1f << 16);
13979 insn1 |= 58 << 26; /* ld */
13980 insn2 = 0x7c636a14; /* add 3,3,13 */
13981 if (offset != (bfd_vma) -1)
13982 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13983 if ((tls_mask & TLS_EXPLICIT) == 0)
13984 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13985 + R_PPC64_GOT_TPREL16_DS);
13986 else
13987 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13988 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13989 }
13990 else
13991 {
13992 /* LE */
13993 insn1 &= 0x1f << 21;
13994 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13995 insn2 = 0x38630000; /* addi 3,3,0 */
13996 if (tls_gd == 0)
13997 {
13998 /* Was an LD reloc. */
13999 if (toc_symndx)
14000 sec = local_sections[toc_symndx];
14001 for (r_symndx = 0;
14002 r_symndx < symtab_hdr->sh_info;
14003 r_symndx++)
14004 if (local_sections[r_symndx] == sec)
14005 break;
14006 if (r_symndx >= symtab_hdr->sh_info)
14007 r_symndx = STN_UNDEF;
14008 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14009 if (r_symndx != STN_UNDEF)
14010 rel->r_addend -= (local_syms[r_symndx].st_value
14011 + sec->output_offset
14012 + sec->output_section->vma);
14013 }
14014 else if (toc_symndx != 0)
14015 {
14016 r_symndx = toc_symndx;
14017 rel->r_addend = toc_addend;
14018 }
14019 r_type = R_PPC64_TPREL16_HA;
14020 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14021 if (offset != (bfd_vma) -1)
14022 {
14023 rel[1].r_info = ELF64_R_INFO (r_symndx,
14024 R_PPC64_TPREL16_LO);
14025 rel[1].r_offset = offset + d_offset;
14026 rel[1].r_addend = rel->r_addend;
14027 }
14028 }
14029 bfd_put_32 (input_bfd, insn1,
14030 contents + rel->r_offset - d_offset);
14031 if (offset != (bfd_vma) -1)
14032 bfd_put_32 (input_bfd, insn2, contents + offset);
14033 if ((tls_mask & tls_gd) == 0
14034 && (tls_gd == 0 || toc_symndx != 0))
14035 {
14036 /* We changed the symbol. Start over in order
14037 to get h, sym, sec etc. right. */
14038 goto again;
14039 }
14040 }
14041 break;
14042
14043 case R_PPC64_TLSGD:
14044 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
14045 {
14046 unsigned int insn2;
14047 bfd_vma offset = rel->r_offset;
14048
14049 if ((tls_mask & TLS_TPRELGD) != 0)
14050 {
14051 /* IE */
14052 r_type = R_PPC64_NONE;
14053 insn2 = 0x7c636a14; /* add 3,3,13 */
14054 }
14055 else
14056 {
14057 /* LE */
14058 if (toc_symndx != 0)
14059 {
14060 r_symndx = toc_symndx;
14061 rel->r_addend = toc_addend;
14062 }
14063 r_type = R_PPC64_TPREL16_LO;
14064 rel->r_offset = offset + d_offset;
14065 insn2 = 0x38630000; /* addi 3,3,0 */
14066 }
14067 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14068 /* Zap the reloc on the _tls_get_addr call too. */
14069 BFD_ASSERT (offset == rel[1].r_offset);
14070 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14071 bfd_put_32 (input_bfd, insn2, contents + offset);
14072 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14073 goto again;
14074 }
14075 break;
14076
14077 case R_PPC64_TLSLD:
14078 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
14079 {
14080 unsigned int insn2;
14081 bfd_vma offset = rel->r_offset;
14082
14083 if (toc_symndx)
14084 sec = local_sections[toc_symndx];
14085 for (r_symndx = 0;
14086 r_symndx < symtab_hdr->sh_info;
14087 r_symndx++)
14088 if (local_sections[r_symndx] == sec)
14089 break;
14090 if (r_symndx >= symtab_hdr->sh_info)
14091 r_symndx = STN_UNDEF;
14092 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14093 if (r_symndx != STN_UNDEF)
14094 rel->r_addend -= (local_syms[r_symndx].st_value
14095 + sec->output_offset
14096 + sec->output_section->vma);
14097
14098 r_type = R_PPC64_TPREL16_LO;
14099 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14100 rel->r_offset = offset + d_offset;
14101 /* Zap the reloc on the _tls_get_addr call too. */
14102 BFD_ASSERT (offset == rel[1].r_offset);
14103 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14104 insn2 = 0x38630000; /* addi 3,3,0 */
14105 bfd_put_32 (input_bfd, insn2, contents + offset);
14106 goto again;
14107 }
14108 break;
14109
14110 case R_PPC64_DTPMOD64:
14111 if (rel + 1 < relend
14112 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14113 && rel[1].r_offset == rel->r_offset + 8)
14114 {
14115 if ((tls_mask & TLS_GD) == 0)
14116 {
14117 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14118 if ((tls_mask & TLS_TPRELGD) != 0)
14119 r_type = R_PPC64_TPREL64;
14120 else
14121 {
14122 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14123 r_type = R_PPC64_NONE;
14124 }
14125 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14126 }
14127 }
14128 else
14129 {
14130 if ((tls_mask & TLS_LD) == 0)
14131 {
14132 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14133 r_type = R_PPC64_NONE;
14134 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14135 }
14136 }
14137 break;
14138
14139 case R_PPC64_TPREL64:
14140 if ((tls_mask & TLS_TPREL) == 0)
14141 {
14142 r_type = R_PPC64_NONE;
14143 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14144 }
14145 break;
14146
14147 case R_PPC64_ENTRY:
14148 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14149 if (!bfd_link_pic (info)
14150 && !info->traditional_format
14151 && 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 LIS_R2 + 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 else
14169 {
14170 relocation -= (rel->r_offset
14171 + input_section->output_offset
14172 + input_section->output_section->vma);
14173 if (relocation + 0x80008000 <= 0xffffffff)
14174 {
14175 unsigned int insn1, insn2;
14176
14177 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14178 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14179 if ((insn1 & ~0xfffc) == LD_R2_0R12
14180 && insn2 == ADD_R2_R2_R12)
14181 {
14182 bfd_put_32 (input_bfd,
14183 ADDIS_R2_R12 + PPC_HA (relocation),
14184 contents + rel->r_offset);
14185 bfd_put_32 (input_bfd,
14186 ADDI_R2_R2 + PPC_LO (relocation),
14187 contents + rel->r_offset + 4);
14188 }
14189 }
14190 }
14191 break;
14192
14193 case R_PPC64_REL16_HA:
14194 /* If we are generating a non-PIC executable, edit
14195 . 0: addis 2,12,.TOC.-0b@ha
14196 . addi 2,2,.TOC.-0b@l
14197 used by ELFv2 global entry points to set up r2, to
14198 . lis 2,.TOC.@ha
14199 . addi 2,2,.TOC.@l
14200 if .TOC. is in range. */
14201 if (!bfd_link_pic (info)
14202 && !info->traditional_format
14203 && !htab->opd_abi
14204 && rel->r_addend == d_offset
14205 && h != NULL && &h->elf == htab->elf.hgot
14206 && rel + 1 < relend
14207 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14208 && rel[1].r_offset == rel->r_offset + 4
14209 && rel[1].r_addend == rel->r_addend + 4
14210 && relocation + 0x80008000 <= 0xffffffff)
14211 {
14212 unsigned int insn1, insn2;
14213 bfd_vma offset = rel->r_offset - d_offset;
14214 insn1 = bfd_get_32 (input_bfd, contents + offset);
14215 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14216 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14217 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14218 {
14219 r_type = R_PPC64_ADDR16_HA;
14220 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14221 rel->r_addend -= d_offset;
14222 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14223 rel[1].r_addend -= d_offset + 4;
14224 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14225 }
14226 }
14227 break;
14228 }
14229
14230 /* Handle other relocations that tweak non-addend part of insn. */
14231 insn = 0;
14232 max_br_offset = 1 << 25;
14233 addend = rel->r_addend;
14234 reloc_dest = DEST_NORMAL;
14235 switch (r_type)
14236 {
14237 default:
14238 break;
14239
14240 case R_PPC64_TOCSAVE:
14241 if (relocation + addend == (rel->r_offset
14242 + input_section->output_offset
14243 + input_section->output_section->vma)
14244 && tocsave_find (htab, NO_INSERT,
14245 &local_syms, rel, input_bfd))
14246 {
14247 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14248 if (insn == NOP
14249 || insn == CROR_151515 || insn == CROR_313131)
14250 bfd_put_32 (input_bfd,
14251 STD_R2_0R1 + STK_TOC (htab),
14252 contents + rel->r_offset);
14253 }
14254 break;
14255
14256 /* Branch taken prediction relocations. */
14257 case R_PPC64_ADDR14_BRTAKEN:
14258 case R_PPC64_REL14_BRTAKEN:
14259 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14260 /* Fall through. */
14261
14262 /* Branch not taken prediction relocations. */
14263 case R_PPC64_ADDR14_BRNTAKEN:
14264 case R_PPC64_REL14_BRNTAKEN:
14265 insn |= bfd_get_32 (input_bfd,
14266 contents + rel->r_offset) & ~(0x01 << 21);
14267 /* Fall through. */
14268
14269 case R_PPC64_REL14:
14270 max_br_offset = 1 << 15;
14271 /* Fall through. */
14272
14273 case R_PPC64_REL24:
14274 /* Calls to functions with a different TOC, such as calls to
14275 shared objects, need to alter the TOC pointer. This is
14276 done using a linkage stub. A REL24 branching to these
14277 linkage stubs needs to be followed by a nop, as the nop
14278 will be replaced with an instruction to restore the TOC
14279 base pointer. */
14280 fdh = h;
14281 if (h != NULL
14282 && h->oh != NULL
14283 && h->oh->is_func_descriptor)
14284 fdh = ppc_follow_link (h->oh);
14285 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14286 htab);
14287 if (stub_entry != NULL
14288 && (stub_entry->stub_type == ppc_stub_plt_call
14289 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14290 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14291 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14292 {
14293 bfd_boolean can_plt_call = FALSE;
14294
14295 if (stub_entry->stub_type == ppc_stub_plt_call
14296 && !htab->opd_abi
14297 && htab->params->plt_localentry0 != 0
14298 && is_elfv2_localentry0 (&h->elf))
14299 {
14300 /* The function doesn't use or change r2. */
14301 can_plt_call = TRUE;
14302 }
14303
14304 /* All of these stubs may modify r2, so there must be a
14305 branch and link followed by a nop. The nop is
14306 replaced by an insn to restore r2. */
14307 else if (rel->r_offset + 8 <= input_section->size)
14308 {
14309 unsigned long br;
14310
14311 br = bfd_get_32 (input_bfd,
14312 contents + rel->r_offset);
14313 if ((br & 1) != 0)
14314 {
14315 unsigned long nop;
14316
14317 nop = bfd_get_32 (input_bfd,
14318 contents + rel->r_offset + 4);
14319 if (nop == NOP
14320 || nop == CROR_151515 || nop == CROR_313131)
14321 {
14322 if (h != NULL
14323 && (h == htab->tls_get_addr_fd
14324 || h == htab->tls_get_addr)
14325 && htab->params->tls_get_addr_opt)
14326 {
14327 /* Special stub used, leave nop alone. */
14328 }
14329 else
14330 bfd_put_32 (input_bfd,
14331 LD_R2_0R1 + STK_TOC (htab),
14332 contents + rel->r_offset + 4);
14333 can_plt_call = TRUE;
14334 }
14335 }
14336 }
14337
14338 if (!can_plt_call && h != NULL)
14339 {
14340 const char *name = h->elf.root.root.string;
14341
14342 if (*name == '.')
14343 ++name;
14344
14345 if (strncmp (name, "__libc_start_main", 17) == 0
14346 && (name[17] == 0 || name[17] == '@'))
14347 {
14348 /* Allow crt1 branch to go via a toc adjusting
14349 stub. Other calls that never return could do
14350 the same, if we could detect such. */
14351 can_plt_call = TRUE;
14352 }
14353 }
14354
14355 if (!can_plt_call)
14356 {
14357 /* g++ as of 20130507 emits self-calls without a
14358 following nop. This is arguably wrong since we
14359 have conflicting information. On the one hand a
14360 global symbol and on the other a local call
14361 sequence, but don't error for this special case.
14362 It isn't possible to cheaply verify we have
14363 exactly such a call. Allow all calls to the same
14364 section. */
14365 asection *code_sec = sec;
14366
14367 if (get_opd_info (sec) != NULL)
14368 {
14369 bfd_vma off = (relocation + addend
14370 - sec->output_section->vma
14371 - sec->output_offset);
14372
14373 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14374 }
14375 if (code_sec == input_section)
14376 can_plt_call = TRUE;
14377 }
14378
14379 if (!can_plt_call)
14380 {
14381 if (stub_entry->stub_type == ppc_stub_plt_call
14382 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14383 info->callbacks->einfo
14384 /* xgettext:c-format */
14385 (_("%H: call to `%T' lacks nop, can't restore toc; "
14386 "recompile with -fPIC\n"),
14387 input_bfd, input_section, rel->r_offset, sym_name);
14388 else
14389 info->callbacks->einfo
14390 /* xgettext:c-format */
14391 (_("%H: call to `%T' lacks nop, can't restore toc; "
14392 "(-mcmodel=small toc adjust stub)\n"),
14393 input_bfd, input_section, rel->r_offset, sym_name);
14394
14395 bfd_set_error (bfd_error_bad_value);
14396 ret = FALSE;
14397 }
14398
14399 if (can_plt_call
14400 && (stub_entry->stub_type == ppc_stub_plt_call
14401 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14402 unresolved_reloc = FALSE;
14403 }
14404
14405 if ((stub_entry == NULL
14406 || stub_entry->stub_type == ppc_stub_long_branch
14407 || stub_entry->stub_type == ppc_stub_plt_branch)
14408 && get_opd_info (sec) != NULL)
14409 {
14410 /* The branch destination is the value of the opd entry. */
14411 bfd_vma off = (relocation + addend
14412 - sec->output_section->vma
14413 - sec->output_offset);
14414 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14415 if (dest != (bfd_vma) -1)
14416 {
14417 relocation = dest;
14418 addend = 0;
14419 reloc_dest = DEST_OPD;
14420 }
14421 }
14422
14423 /* If the branch is out of reach we ought to have a long
14424 branch stub. */
14425 from = (rel->r_offset
14426 + input_section->output_offset
14427 + input_section->output_section->vma);
14428
14429 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14430 ? fdh->elf.other
14431 : sym->st_other);
14432
14433 if (stub_entry != NULL
14434 && (stub_entry->stub_type == ppc_stub_long_branch
14435 || stub_entry->stub_type == ppc_stub_plt_branch)
14436 && (r_type == R_PPC64_ADDR14_BRTAKEN
14437 || r_type == R_PPC64_ADDR14_BRNTAKEN
14438 || (relocation + addend - from + max_br_offset
14439 < 2 * max_br_offset)))
14440 /* Don't use the stub if this branch is in range. */
14441 stub_entry = NULL;
14442
14443 if (stub_entry != NULL)
14444 {
14445 /* Munge up the value and addend so that we call the stub
14446 rather than the procedure directly. */
14447 asection *stub_sec = stub_entry->group->stub_sec;
14448
14449 if (stub_entry->stub_type == ppc_stub_save_res)
14450 relocation += (stub_sec->output_offset
14451 + stub_sec->output_section->vma
14452 + stub_sec->size - htab->sfpr->size
14453 - htab->sfpr->output_offset
14454 - htab->sfpr->output_section->vma);
14455 else
14456 relocation = (stub_entry->stub_offset
14457 + stub_sec->output_offset
14458 + stub_sec->output_section->vma);
14459 addend = 0;
14460 reloc_dest = DEST_STUB;
14461
14462 if ((stub_entry->stub_type == ppc_stub_plt_call
14463 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14464 && (ALWAYS_EMIT_R2SAVE
14465 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14466 && rel + 1 < relend
14467 && rel[1].r_offset == rel->r_offset + 4
14468 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14469 relocation += 4;
14470 }
14471
14472 if (insn != 0)
14473 {
14474 if (is_isa_v2)
14475 {
14476 /* Set 'a' bit. This is 0b00010 in BO field for branch
14477 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14478 for branch on CTR insns (BO == 1a00t or 1a01t). */
14479 if ((insn & (0x14 << 21)) == (0x04 << 21))
14480 insn |= 0x02 << 21;
14481 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14482 insn |= 0x08 << 21;
14483 else
14484 break;
14485 }
14486 else
14487 {
14488 /* Invert 'y' bit if not the default. */
14489 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14490 insn ^= 0x01 << 21;
14491 }
14492
14493 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14494 }
14495
14496 /* NOP out calls to undefined weak functions.
14497 We can thus call a weak function without first
14498 checking whether the function is defined. */
14499 else if (h != NULL
14500 && h->elf.root.type == bfd_link_hash_undefweak
14501 && h->elf.dynindx == -1
14502 && r_type == R_PPC64_REL24
14503 && relocation == 0
14504 && addend == 0)
14505 {
14506 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14507 goto copy_reloc;
14508 }
14509 break;
14510 }
14511
14512 /* Set `addend'. */
14513 tls_type = 0;
14514 switch (r_type)
14515 {
14516 default:
14517 info->callbacks->einfo
14518 /* xgettext:c-format */
14519 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14520 input_bfd, (int) r_type, sym_name);
14521
14522 bfd_set_error (bfd_error_bad_value);
14523 ret = FALSE;
14524 goto copy_reloc;
14525
14526 case R_PPC64_NONE:
14527 case R_PPC64_TLS:
14528 case R_PPC64_TLSGD:
14529 case R_PPC64_TLSLD:
14530 case R_PPC64_TOCSAVE:
14531 case R_PPC64_GNU_VTINHERIT:
14532 case R_PPC64_GNU_VTENTRY:
14533 case R_PPC64_ENTRY:
14534 goto copy_reloc;
14535
14536 /* GOT16 relocations. Like an ADDR16 using the symbol's
14537 address in the GOT as relocation value instead of the
14538 symbol's value itself. Also, create a GOT entry for the
14539 symbol and put the symbol value there. */
14540 case R_PPC64_GOT_TLSGD16:
14541 case R_PPC64_GOT_TLSGD16_LO:
14542 case R_PPC64_GOT_TLSGD16_HI:
14543 case R_PPC64_GOT_TLSGD16_HA:
14544 tls_type = TLS_TLS | TLS_GD;
14545 goto dogot;
14546
14547 case R_PPC64_GOT_TLSLD16:
14548 case R_PPC64_GOT_TLSLD16_LO:
14549 case R_PPC64_GOT_TLSLD16_HI:
14550 case R_PPC64_GOT_TLSLD16_HA:
14551 tls_type = TLS_TLS | TLS_LD;
14552 goto dogot;
14553
14554 case R_PPC64_GOT_TPREL16_DS:
14555 case R_PPC64_GOT_TPREL16_LO_DS:
14556 case R_PPC64_GOT_TPREL16_HI:
14557 case R_PPC64_GOT_TPREL16_HA:
14558 tls_type = TLS_TLS | TLS_TPREL;
14559 goto dogot;
14560
14561 case R_PPC64_GOT_DTPREL16_DS:
14562 case R_PPC64_GOT_DTPREL16_LO_DS:
14563 case R_PPC64_GOT_DTPREL16_HI:
14564 case R_PPC64_GOT_DTPREL16_HA:
14565 tls_type = TLS_TLS | TLS_DTPREL;
14566 goto dogot;
14567
14568 case R_PPC64_GOT16:
14569 case R_PPC64_GOT16_LO:
14570 case R_PPC64_GOT16_HI:
14571 case R_PPC64_GOT16_HA:
14572 case R_PPC64_GOT16_DS:
14573 case R_PPC64_GOT16_LO_DS:
14574 dogot:
14575 {
14576 /* Relocation is to the entry for this symbol in the global
14577 offset table. */
14578 asection *got;
14579 bfd_vma *offp;
14580 bfd_vma off;
14581 unsigned long indx = 0;
14582 struct got_entry *ent;
14583
14584 if (tls_type == (TLS_TLS | TLS_LD)
14585 && (h == NULL
14586 || !h->elf.def_dynamic))
14587 ent = ppc64_tlsld_got (input_bfd);
14588 else
14589 {
14590 if (h != NULL)
14591 {
14592 if (!htab->elf.dynamic_sections_created
14593 || h->elf.dynindx == -1
14594 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14595 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14596 /* This is actually a static link, or it is a
14597 -Bsymbolic link and the symbol is defined
14598 locally, or the symbol was forced to be local
14599 because of a version file. */
14600 ;
14601 else
14602 {
14603 indx = h->elf.dynindx;
14604 unresolved_reloc = FALSE;
14605 }
14606 ent = h->elf.got.glist;
14607 }
14608 else
14609 {
14610 if (local_got_ents == NULL)
14611 abort ();
14612 ent = local_got_ents[r_symndx];
14613 }
14614
14615 for (; ent != NULL; ent = ent->next)
14616 if (ent->addend == orig_rel.r_addend
14617 && ent->owner == input_bfd
14618 && ent->tls_type == tls_type)
14619 break;
14620 }
14621
14622 if (ent == NULL)
14623 abort ();
14624 if (ent->is_indirect)
14625 ent = ent->got.ent;
14626 offp = &ent->got.offset;
14627 got = ppc64_elf_tdata (ent->owner)->got;
14628 if (got == NULL)
14629 abort ();
14630
14631 /* The offset must always be a multiple of 8. We use the
14632 least significant bit to record whether we have already
14633 processed this entry. */
14634 off = *offp;
14635 if ((off & 1) != 0)
14636 off &= ~1;
14637 else
14638 {
14639 /* Generate relocs for the dynamic linker, except in
14640 the case of TLSLD where we'll use one entry per
14641 module. */
14642 asection *relgot;
14643 bfd_boolean ifunc;
14644
14645 *offp = off | 1;
14646 relgot = NULL;
14647 ifunc = (h != NULL
14648 ? h->elf.type == STT_GNU_IFUNC
14649 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14650 if (ifunc)
14651 {
14652 relgot = htab->elf.irelplt;
14653 if (indx == 0)
14654 htab->local_ifunc_resolver = 1;
14655 else if (is_static_defined (&h->elf))
14656 htab->maybe_local_ifunc_resolver = 1;
14657 }
14658 else if (indx != 0
14659 || (bfd_link_pic (info)
14660 && (h == NULL
14661 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14662 || (tls_type == (TLS_TLS | TLS_LD)
14663 && !h->elf.def_dynamic))))
14664 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14665 if (relgot != NULL)
14666 {
14667 outrel.r_offset = (got->output_section->vma
14668 + got->output_offset
14669 + off);
14670 outrel.r_addend = addend;
14671 if (tls_type & (TLS_LD | TLS_GD))
14672 {
14673 outrel.r_addend = 0;
14674 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14675 if (tls_type == (TLS_TLS | TLS_GD))
14676 {
14677 loc = relgot->contents;
14678 loc += (relgot->reloc_count++
14679 * sizeof (Elf64_External_Rela));
14680 bfd_elf64_swap_reloca_out (output_bfd,
14681 &outrel, loc);
14682 outrel.r_offset += 8;
14683 outrel.r_addend = addend;
14684 outrel.r_info
14685 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14686 }
14687 }
14688 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14689 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14690 else if (tls_type == (TLS_TLS | TLS_TPREL))
14691 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14692 else if (indx != 0)
14693 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14694 else
14695 {
14696 if (ifunc)
14697 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14698 else
14699 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14700
14701 /* Write the .got section contents for the sake
14702 of prelink. */
14703 loc = got->contents + off;
14704 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14705 loc);
14706 }
14707
14708 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14709 {
14710 outrel.r_addend += relocation;
14711 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14712 {
14713 if (htab->elf.tls_sec == NULL)
14714 outrel.r_addend = 0;
14715 else
14716 outrel.r_addend -= htab->elf.tls_sec->vma;
14717 }
14718 }
14719 loc = relgot->contents;
14720 loc += (relgot->reloc_count++
14721 * sizeof (Elf64_External_Rela));
14722 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14723 }
14724
14725 /* Init the .got section contents here if we're not
14726 emitting a reloc. */
14727 else
14728 {
14729 relocation += addend;
14730 if (tls_type != 0)
14731 {
14732 if (htab->elf.tls_sec == NULL)
14733 relocation = 0;
14734 else
14735 {
14736 if (tls_type & TLS_LD)
14737 relocation = 0;
14738 else
14739 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14740 if (tls_type & TLS_TPREL)
14741 relocation += DTP_OFFSET - TP_OFFSET;
14742 }
14743
14744 if (tls_type & (TLS_GD | TLS_LD))
14745 {
14746 bfd_put_64 (output_bfd, relocation,
14747 got->contents + off + 8);
14748 relocation = 1;
14749 }
14750 }
14751 bfd_put_64 (output_bfd, relocation,
14752 got->contents + off);
14753 }
14754 }
14755
14756 if (off >= (bfd_vma) -2)
14757 abort ();
14758
14759 relocation = got->output_section->vma + got->output_offset + off;
14760 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14761 }
14762 break;
14763
14764 case R_PPC64_PLT16_HA:
14765 case R_PPC64_PLT16_HI:
14766 case R_PPC64_PLT16_LO:
14767 case R_PPC64_PLT32:
14768 case R_PPC64_PLT64:
14769 /* Relocation is to the entry for this symbol in the
14770 procedure linkage table. */
14771 {
14772 struct plt_entry **plt_list = NULL;
14773 if (h != NULL)
14774 plt_list = &h->elf.plt.plist;
14775 else if (local_got_ents != NULL)
14776 {
14777 struct plt_entry **local_plt = (struct plt_entry **)
14778 (local_got_ents + symtab_hdr->sh_info);
14779 unsigned char *local_got_tls_masks = (unsigned char *)
14780 (local_plt + symtab_hdr->sh_info);
14781 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14782 plt_list = local_plt + r_symndx;
14783 }
14784 if (plt_list)
14785 {
14786 struct plt_entry *ent;
14787
14788 for (ent = *plt_list; ent != NULL; ent = ent->next)
14789 if (ent->plt.offset != (bfd_vma) -1
14790 && ent->addend == orig_rel.r_addend)
14791 {
14792 asection *plt;
14793
14794 plt = htab->elf.splt;
14795 if (!htab->elf.dynamic_sections_created
14796 || h == NULL
14797 || h->elf.dynindx == -1)
14798 plt = htab->elf.iplt;
14799 relocation = (plt->output_section->vma
14800 + plt->output_offset
14801 + ent->plt.offset);
14802 addend = 0;
14803 unresolved_reloc = FALSE;
14804 break;
14805 }
14806 }
14807 }
14808 break;
14809
14810 case R_PPC64_TOC:
14811 /* Relocation value is TOC base. */
14812 relocation = TOCstart;
14813 if (r_symndx == STN_UNDEF)
14814 relocation += htab->sec_info[input_section->id].toc_off;
14815 else if (unresolved_reloc)
14816 ;
14817 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14818 relocation += htab->sec_info[sec->id].toc_off;
14819 else
14820 unresolved_reloc = TRUE;
14821 goto dodyn;
14822
14823 /* TOC16 relocs. We want the offset relative to the TOC base,
14824 which is the address of the start of the TOC plus 0x8000.
14825 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14826 in this order. */
14827 case R_PPC64_TOC16:
14828 case R_PPC64_TOC16_LO:
14829 case R_PPC64_TOC16_HI:
14830 case R_PPC64_TOC16_DS:
14831 case R_PPC64_TOC16_LO_DS:
14832 case R_PPC64_TOC16_HA:
14833 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14834 break;
14835
14836 /* Relocate against the beginning of the section. */
14837 case R_PPC64_SECTOFF:
14838 case R_PPC64_SECTOFF_LO:
14839 case R_PPC64_SECTOFF_HI:
14840 case R_PPC64_SECTOFF_DS:
14841 case R_PPC64_SECTOFF_LO_DS:
14842 case R_PPC64_SECTOFF_HA:
14843 if (sec != NULL)
14844 addend -= sec->output_section->vma;
14845 break;
14846
14847 case R_PPC64_REL16:
14848 case R_PPC64_REL16_LO:
14849 case R_PPC64_REL16_HI:
14850 case R_PPC64_REL16_HA:
14851 case R_PPC64_REL16DX_HA:
14852 break;
14853
14854 case R_PPC64_REL14:
14855 case R_PPC64_REL14_BRNTAKEN:
14856 case R_PPC64_REL14_BRTAKEN:
14857 case R_PPC64_REL24:
14858 break;
14859
14860 case R_PPC64_TPREL16:
14861 case R_PPC64_TPREL16_LO:
14862 case R_PPC64_TPREL16_HI:
14863 case R_PPC64_TPREL16_HA:
14864 case R_PPC64_TPREL16_DS:
14865 case R_PPC64_TPREL16_LO_DS:
14866 case R_PPC64_TPREL16_HIGH:
14867 case R_PPC64_TPREL16_HIGHA:
14868 case R_PPC64_TPREL16_HIGHER:
14869 case R_PPC64_TPREL16_HIGHERA:
14870 case R_PPC64_TPREL16_HIGHEST:
14871 case R_PPC64_TPREL16_HIGHESTA:
14872 if (h != NULL
14873 && h->elf.root.type == bfd_link_hash_undefweak
14874 && h->elf.dynindx == -1)
14875 {
14876 /* Make this relocation against an undefined weak symbol
14877 resolve to zero. This is really just a tweak, since
14878 code using weak externs ought to check that they are
14879 defined before using them. */
14880 bfd_byte *p = contents + rel->r_offset - d_offset;
14881
14882 insn = bfd_get_32 (input_bfd, p);
14883 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14884 if (insn != 0)
14885 bfd_put_32 (input_bfd, insn, p);
14886 break;
14887 }
14888 if (htab->elf.tls_sec != NULL)
14889 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14890 /* The TPREL16 relocs shouldn't really be used in shared
14891 libs or with non-local symbols as that will result in
14892 DT_TEXTREL being set, but support them anyway. */
14893 goto dodyn;
14894
14895 case R_PPC64_DTPREL16:
14896 case R_PPC64_DTPREL16_LO:
14897 case R_PPC64_DTPREL16_HI:
14898 case R_PPC64_DTPREL16_HA:
14899 case R_PPC64_DTPREL16_DS:
14900 case R_PPC64_DTPREL16_LO_DS:
14901 case R_PPC64_DTPREL16_HIGH:
14902 case R_PPC64_DTPREL16_HIGHA:
14903 case R_PPC64_DTPREL16_HIGHER:
14904 case R_PPC64_DTPREL16_HIGHERA:
14905 case R_PPC64_DTPREL16_HIGHEST:
14906 case R_PPC64_DTPREL16_HIGHESTA:
14907 if (htab->elf.tls_sec != NULL)
14908 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14909 break;
14910
14911 case R_PPC64_ADDR64_LOCAL:
14912 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14913 ? h->elf.other
14914 : sym->st_other);
14915 break;
14916
14917 case R_PPC64_DTPMOD64:
14918 relocation = 1;
14919 addend = 0;
14920 goto dodyn;
14921
14922 case R_PPC64_TPREL64:
14923 if (htab->elf.tls_sec != NULL)
14924 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14925 goto dodyn;
14926
14927 case R_PPC64_DTPREL64:
14928 if (htab->elf.tls_sec != NULL)
14929 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14930 /* Fall through. */
14931
14932 /* Relocations that may need to be propagated if this is a
14933 dynamic object. */
14934 case R_PPC64_REL30:
14935 case R_PPC64_REL32:
14936 case R_PPC64_REL64:
14937 case R_PPC64_ADDR14:
14938 case R_PPC64_ADDR14_BRNTAKEN:
14939 case R_PPC64_ADDR14_BRTAKEN:
14940 case R_PPC64_ADDR16:
14941 case R_PPC64_ADDR16_DS:
14942 case R_PPC64_ADDR16_HA:
14943 case R_PPC64_ADDR16_HI:
14944 case R_PPC64_ADDR16_HIGH:
14945 case R_PPC64_ADDR16_HIGHA:
14946 case R_PPC64_ADDR16_HIGHER:
14947 case R_PPC64_ADDR16_HIGHERA:
14948 case R_PPC64_ADDR16_HIGHEST:
14949 case R_PPC64_ADDR16_HIGHESTA:
14950 case R_PPC64_ADDR16_LO:
14951 case R_PPC64_ADDR16_LO_DS:
14952 case R_PPC64_ADDR24:
14953 case R_PPC64_ADDR32:
14954 case R_PPC64_ADDR64:
14955 case R_PPC64_UADDR16:
14956 case R_PPC64_UADDR32:
14957 case R_PPC64_UADDR64:
14958 dodyn:
14959 if ((input_section->flags & SEC_ALLOC) == 0)
14960 break;
14961
14962 if (NO_OPD_RELOCS && is_opd)
14963 break;
14964
14965 if (bfd_link_pic (info)
14966 ? ((h == NULL
14967 || h->dyn_relocs != NULL)
14968 && ((h != NULL && pc_dynrelocs (h))
14969 || must_be_dyn_reloc (info, r_type)))
14970 : (h != NULL
14971 ? h->dyn_relocs != NULL
14972 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14973 {
14974 bfd_boolean skip, relocate;
14975 asection *sreloc;
14976 bfd_vma out_off;
14977 long indx = 0;
14978
14979 /* When generating a dynamic object, these relocations
14980 are copied into the output file to be resolved at run
14981 time. */
14982
14983 skip = FALSE;
14984 relocate = FALSE;
14985
14986 out_off = _bfd_elf_section_offset (output_bfd, info,
14987 input_section, rel->r_offset);
14988 if (out_off == (bfd_vma) -1)
14989 skip = TRUE;
14990 else if (out_off == (bfd_vma) -2)
14991 skip = TRUE, relocate = TRUE;
14992 out_off += (input_section->output_section->vma
14993 + input_section->output_offset);
14994 outrel.r_offset = out_off;
14995 outrel.r_addend = rel->r_addend;
14996
14997 /* Optimize unaligned reloc use. */
14998 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14999 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
15000 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
15001 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
15002 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
15003 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
15004 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
15005 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
15006 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
15007
15008 if (skip)
15009 memset (&outrel, 0, sizeof outrel);
15010 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
15011 && !is_opd
15012 && r_type != R_PPC64_TOC)
15013 {
15014 indx = h->elf.dynindx;
15015 BFD_ASSERT (indx != -1);
15016 outrel.r_info = ELF64_R_INFO (indx, r_type);
15017 }
15018 else
15019 {
15020 /* This symbol is local, or marked to become local,
15021 or this is an opd section reloc which must point
15022 at a local function. */
15023 outrel.r_addend += relocation;
15024 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
15025 {
15026 if (is_opd && h != NULL)
15027 {
15028 /* Lie about opd entries. This case occurs
15029 when building shared libraries and we
15030 reference a function in another shared
15031 lib. The same thing happens for a weak
15032 definition in an application that's
15033 overridden by a strong definition in a
15034 shared lib. (I believe this is a generic
15035 bug in binutils handling of weak syms.)
15036 In these cases we won't use the opd
15037 entry in this lib. */
15038 unresolved_reloc = FALSE;
15039 }
15040 if (!is_opd
15041 && r_type == R_PPC64_ADDR64
15042 && (h != NULL
15043 ? h->elf.type == STT_GNU_IFUNC
15044 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15045 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15046 else
15047 {
15048 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15049
15050 /* We need to relocate .opd contents for ld.so.
15051 Prelink also wants simple and consistent rules
15052 for relocs. This make all RELATIVE relocs have
15053 *r_offset equal to r_addend. */
15054 relocate = TRUE;
15055 }
15056 }
15057 else
15058 {
15059 if (h != NULL
15060 ? h->elf.type == STT_GNU_IFUNC
15061 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15062 {
15063 info->callbacks->einfo
15064 /* xgettext:c-format */
15065 (_("%H: %s for indirect "
15066 "function `%T' unsupported\n"),
15067 input_bfd, input_section, rel->r_offset,
15068 ppc64_elf_howto_table[r_type]->name,
15069 sym_name);
15070 ret = FALSE;
15071 }
15072 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15073 ;
15074 else if (sec == NULL || sec->owner == NULL)
15075 {
15076 bfd_set_error (bfd_error_bad_value);
15077 return FALSE;
15078 }
15079 else
15080 {
15081 asection *osec;
15082
15083 osec = sec->output_section;
15084 indx = elf_section_data (osec)->dynindx;
15085
15086 if (indx == 0)
15087 {
15088 if ((osec->flags & SEC_READONLY) == 0
15089 && htab->elf.data_index_section != NULL)
15090 osec = htab->elf.data_index_section;
15091 else
15092 osec = htab->elf.text_index_section;
15093 indx = elf_section_data (osec)->dynindx;
15094 }
15095 BFD_ASSERT (indx != 0);
15096
15097 /* We are turning this relocation into one
15098 against a section symbol, so subtract out
15099 the output section's address but not the
15100 offset of the input section in the output
15101 section. */
15102 outrel.r_addend -= osec->vma;
15103 }
15104
15105 outrel.r_info = ELF64_R_INFO (indx, r_type);
15106 }
15107 }
15108
15109 sreloc = elf_section_data (input_section)->sreloc;
15110 if (h != NULL
15111 ? h->elf.type == STT_GNU_IFUNC
15112 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15113 {
15114 sreloc = htab->elf.irelplt;
15115 if (indx == 0)
15116 htab->local_ifunc_resolver = 1;
15117 else if (is_static_defined (&h->elf))
15118 htab->maybe_local_ifunc_resolver = 1;
15119 }
15120 if (sreloc == NULL)
15121 abort ();
15122
15123 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15124 >= sreloc->size)
15125 abort ();
15126 loc = sreloc->contents;
15127 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15128 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15129
15130 /* If this reloc is against an external symbol, it will
15131 be computed at runtime, so there's no need to do
15132 anything now. However, for the sake of prelink ensure
15133 that the section contents are a known value. */
15134 if (! relocate)
15135 {
15136 unresolved_reloc = FALSE;
15137 /* The value chosen here is quite arbitrary as ld.so
15138 ignores section contents except for the special
15139 case of .opd where the contents might be accessed
15140 before relocation. Choose zero, as that won't
15141 cause reloc overflow. */
15142 relocation = 0;
15143 addend = 0;
15144 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15145 to improve backward compatibility with older
15146 versions of ld. */
15147 if (r_type == R_PPC64_ADDR64)
15148 addend = outrel.r_addend;
15149 /* Adjust pc_relative relocs to have zero in *r_offset. */
15150 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15151 addend = outrel.r_offset;
15152 }
15153 }
15154 break;
15155
15156 case R_PPC64_COPY:
15157 case R_PPC64_GLOB_DAT:
15158 case R_PPC64_JMP_SLOT:
15159 case R_PPC64_JMP_IREL:
15160 case R_PPC64_RELATIVE:
15161 /* We shouldn't ever see these dynamic relocs in relocatable
15162 files. */
15163 /* Fall through. */
15164
15165 case R_PPC64_PLTGOT16:
15166 case R_PPC64_PLTGOT16_DS:
15167 case R_PPC64_PLTGOT16_HA:
15168 case R_PPC64_PLTGOT16_HI:
15169 case R_PPC64_PLTGOT16_LO:
15170 case R_PPC64_PLTGOT16_LO_DS:
15171 case R_PPC64_PLTREL32:
15172 case R_PPC64_PLTREL64:
15173 /* These ones haven't been implemented yet. */
15174
15175 info->callbacks->einfo
15176 /* xgettext:c-format */
15177 (_("%P: %B: %s is not supported for `%T'\n"),
15178 input_bfd,
15179 ppc64_elf_howto_table[r_type]->name, sym_name);
15180
15181 bfd_set_error (bfd_error_invalid_operation);
15182 ret = FALSE;
15183 goto copy_reloc;
15184 }
15185
15186 /* Multi-instruction sequences that access the TOC can be
15187 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15188 to nop; addi rb,r2,x; */
15189 howto = ppc64_elf_howto_table[(int) r_type];
15190 switch (r_type)
15191 {
15192 default:
15193 break;
15194
15195 case R_PPC64_GOT_TLSLD16_HI:
15196 case R_PPC64_GOT_TLSGD16_HI:
15197 case R_PPC64_GOT_TPREL16_HI:
15198 case R_PPC64_GOT_DTPREL16_HI:
15199 case R_PPC64_GOT16_HI:
15200 case R_PPC64_TOC16_HI:
15201 /* These relocs would only be useful if building up an
15202 offset to later add to r2, perhaps in an indexed
15203 addressing mode instruction. Don't try to optimize.
15204 Unfortunately, the possibility of someone building up an
15205 offset like this or even with the HA relocs, means that
15206 we need to check the high insn when optimizing the low
15207 insn. */
15208 break;
15209
15210 case R_PPC64_GOT_TLSLD16_HA:
15211 case R_PPC64_GOT_TLSGD16_HA:
15212 case R_PPC64_GOT_TPREL16_HA:
15213 case R_PPC64_GOT_DTPREL16_HA:
15214 case R_PPC64_GOT16_HA:
15215 case R_PPC64_TOC16_HA:
15216 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15217 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15218 {
15219 bfd_byte *p = contents + (rel->r_offset & ~3);
15220 bfd_put_32 (input_bfd, NOP, p);
15221 }
15222 break;
15223
15224 case R_PPC64_GOT_TLSLD16_LO:
15225 case R_PPC64_GOT_TLSGD16_LO:
15226 case R_PPC64_GOT_TPREL16_LO_DS:
15227 case R_PPC64_GOT_DTPREL16_LO_DS:
15228 case R_PPC64_GOT16_LO:
15229 case R_PPC64_GOT16_LO_DS:
15230 case R_PPC64_TOC16_LO:
15231 case R_PPC64_TOC16_LO_DS:
15232 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15233 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15234 {
15235 bfd_byte *p = contents + (rel->r_offset & ~3);
15236 insn = bfd_get_32 (input_bfd, p);
15237 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15238 {
15239 /* Transform addic to addi when we change reg. */
15240 insn &= ~((0x3f << 26) | (0x1f << 16));
15241 insn |= (14u << 26) | (2 << 16);
15242 }
15243 else
15244 {
15245 insn &= ~(0x1f << 16);
15246 insn |= 2 << 16;
15247 }
15248 bfd_put_32 (input_bfd, insn, p);
15249 }
15250 break;
15251
15252 case R_PPC64_TPREL16_HA:
15253 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15254 {
15255 bfd_byte *p = contents + (rel->r_offset & ~3);
15256 insn = bfd_get_32 (input_bfd, p);
15257 if ((insn & ((0x3f << 26) | 0x1f << 16))
15258 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15259 /* xgettext:c-format */
15260 info->callbacks->minfo
15261 (_("%H: warning: %s unexpected insn %#x.\n"),
15262 input_bfd, input_section, rel->r_offset, howto->name, insn);
15263 else
15264 bfd_put_32 (input_bfd, NOP, p);
15265 }
15266 break;
15267
15268 case R_PPC64_TPREL16_LO:
15269 case R_PPC64_TPREL16_LO_DS:
15270 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15271 {
15272 bfd_byte *p = contents + (rel->r_offset & ~3);
15273 insn = bfd_get_32 (input_bfd, p);
15274 insn &= ~(0x1f << 16);
15275 insn |= 13 << 16;
15276 bfd_put_32 (input_bfd, insn, p);
15277 }
15278 break;
15279 }
15280
15281 /* Do any further special processing. */
15282 switch (r_type)
15283 {
15284 default:
15285 break;
15286
15287 case R_PPC64_REL16_HA:
15288 case R_PPC64_REL16DX_HA:
15289 case R_PPC64_ADDR16_HA:
15290 case R_PPC64_ADDR16_HIGHA:
15291 case R_PPC64_ADDR16_HIGHERA:
15292 case R_PPC64_ADDR16_HIGHESTA:
15293 case R_PPC64_TOC16_HA:
15294 case R_PPC64_SECTOFF_HA:
15295 case R_PPC64_TPREL16_HA:
15296 case R_PPC64_TPREL16_HIGHA:
15297 case R_PPC64_TPREL16_HIGHERA:
15298 case R_PPC64_TPREL16_HIGHESTA:
15299 case R_PPC64_DTPREL16_HA:
15300 case R_PPC64_DTPREL16_HIGHA:
15301 case R_PPC64_DTPREL16_HIGHERA:
15302 case R_PPC64_DTPREL16_HIGHESTA:
15303 /* It's just possible that this symbol is a weak symbol
15304 that's not actually defined anywhere. In that case,
15305 'sec' would be NULL, and we should leave the symbol
15306 alone (it will be set to zero elsewhere in the link). */
15307 if (sec == NULL)
15308 break;
15309 /* Fall through. */
15310
15311 case R_PPC64_GOT16_HA:
15312 case R_PPC64_PLTGOT16_HA:
15313 case R_PPC64_PLT16_HA:
15314 case R_PPC64_GOT_TLSGD16_HA:
15315 case R_PPC64_GOT_TLSLD16_HA:
15316 case R_PPC64_GOT_TPREL16_HA:
15317 case R_PPC64_GOT_DTPREL16_HA:
15318 /* Add 0x10000 if sign bit in 0:15 is set.
15319 Bits 0:15 are not used. */
15320 addend += 0x8000;
15321 break;
15322
15323 case R_PPC64_ADDR16_DS:
15324 case R_PPC64_ADDR16_LO_DS:
15325 case R_PPC64_GOT16_DS:
15326 case R_PPC64_GOT16_LO_DS:
15327 case R_PPC64_PLT16_LO_DS:
15328 case R_PPC64_SECTOFF_DS:
15329 case R_PPC64_SECTOFF_LO_DS:
15330 case R_PPC64_TOC16_DS:
15331 case R_PPC64_TOC16_LO_DS:
15332 case R_PPC64_PLTGOT16_DS:
15333 case R_PPC64_PLTGOT16_LO_DS:
15334 case R_PPC64_GOT_TPREL16_DS:
15335 case R_PPC64_GOT_TPREL16_LO_DS:
15336 case R_PPC64_GOT_DTPREL16_DS:
15337 case R_PPC64_GOT_DTPREL16_LO_DS:
15338 case R_PPC64_TPREL16_DS:
15339 case R_PPC64_TPREL16_LO_DS:
15340 case R_PPC64_DTPREL16_DS:
15341 case R_PPC64_DTPREL16_LO_DS:
15342 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15343 mask = 3;
15344 /* If this reloc is against an lq, lxv, or stxv insn, then
15345 the value must be a multiple of 16. This is somewhat of
15346 a hack, but the "correct" way to do this by defining _DQ
15347 forms of all the _DS relocs bloats all reloc switches in
15348 this file. It doesn't make much sense to use these
15349 relocs in data, so testing the insn should be safe. */
15350 if ((insn & (0x3f << 26)) == (56u << 26)
15351 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15352 mask = 15;
15353 relocation += addend;
15354 addend = insn & (mask ^ 3);
15355 if ((relocation & mask) != 0)
15356 {
15357 relocation ^= relocation & mask;
15358 info->callbacks->einfo
15359 /* xgettext:c-format */
15360 (_("%H: error: %s not a multiple of %u\n"),
15361 input_bfd, input_section, rel->r_offset,
15362 howto->name,
15363 mask + 1);
15364 bfd_set_error (bfd_error_bad_value);
15365 ret = FALSE;
15366 goto copy_reloc;
15367 }
15368 break;
15369 }
15370
15371 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15372 because such sections are not SEC_ALLOC and thus ld.so will
15373 not process them. */
15374 if (unresolved_reloc
15375 && !((input_section->flags & SEC_DEBUGGING) != 0
15376 && h->elf.def_dynamic)
15377 && _bfd_elf_section_offset (output_bfd, info, input_section,
15378 rel->r_offset) != (bfd_vma) -1)
15379 {
15380 info->callbacks->einfo
15381 /* xgettext:c-format */
15382 (_("%H: unresolvable %s against `%T'\n"),
15383 input_bfd, input_section, rel->r_offset,
15384 howto->name,
15385 h->elf.root.root.string);
15386 ret = FALSE;
15387 }
15388
15389 /* 16-bit fields in insns mostly have signed values, but a
15390 few insns have 16-bit unsigned values. Really, we should
15391 have different reloc types. */
15392 if (howto->complain_on_overflow != complain_overflow_dont
15393 && howto->dst_mask == 0xffff
15394 && (input_section->flags & SEC_CODE) != 0)
15395 {
15396 enum complain_overflow complain = complain_overflow_signed;
15397
15398 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15399 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15400 complain = complain_overflow_bitfield;
15401 else if (howto->rightshift == 0
15402 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15403 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15404 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15405 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15406 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15407 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15408 complain = complain_overflow_unsigned;
15409 if (howto->complain_on_overflow != complain)
15410 {
15411 alt_howto = *howto;
15412 alt_howto.complain_on_overflow = complain;
15413 howto = &alt_howto;
15414 }
15415 }
15416
15417 if (r_type == R_PPC64_REL16DX_HA)
15418 {
15419 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15420 if (rel->r_offset + 4 > input_section->size)
15421 r = bfd_reloc_outofrange;
15422 else
15423 {
15424 relocation += addend;
15425 relocation -= (rel->r_offset
15426 + input_section->output_offset
15427 + input_section->output_section->vma);
15428 relocation = (bfd_signed_vma) relocation >> 16;
15429 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15430 insn &= ~0x1fffc1;
15431 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15432 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15433 r = bfd_reloc_ok;
15434 if (relocation + 0x8000 > 0xffff)
15435 r = bfd_reloc_overflow;
15436 }
15437 }
15438 else
15439 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15440 rel->r_offset, relocation, addend);
15441
15442 if (r != bfd_reloc_ok)
15443 {
15444 char *more_info = NULL;
15445 const char *reloc_name = howto->name;
15446
15447 if (reloc_dest != DEST_NORMAL)
15448 {
15449 more_info = bfd_malloc (strlen (reloc_name) + 8);
15450 if (more_info != NULL)
15451 {
15452 strcpy (more_info, reloc_name);
15453 strcat (more_info, (reloc_dest == DEST_OPD
15454 ? " (OPD)" : " (stub)"));
15455 reloc_name = more_info;
15456 }
15457 }
15458
15459 if (r == bfd_reloc_overflow)
15460 {
15461 /* On code like "if (foo) foo();" don't report overflow
15462 on a branch to zero when foo is undefined. */
15463 if (!warned
15464 && (reloc_dest == DEST_STUB
15465 || !(h != NULL
15466 && (h->elf.root.type == bfd_link_hash_undefweak
15467 || h->elf.root.type == bfd_link_hash_undefined)
15468 && is_branch_reloc (r_type))))
15469 info->callbacks->reloc_overflow (info, &h->elf.root,
15470 sym_name, reloc_name,
15471 orig_rel.r_addend,
15472 input_bfd, input_section,
15473 rel->r_offset);
15474 }
15475 else
15476 {
15477 info->callbacks->einfo
15478 /* xgettext:c-format */
15479 (_("%H: %s against `%T': error %d\n"),
15480 input_bfd, input_section, rel->r_offset,
15481 reloc_name, sym_name, (int) r);
15482 ret = FALSE;
15483 }
15484 if (more_info != NULL)
15485 free (more_info);
15486 }
15487 copy_reloc:
15488 if (wrel != rel)
15489 *wrel = *rel;
15490 }
15491
15492 if (wrel != rel)
15493 {
15494 Elf_Internal_Shdr *rel_hdr;
15495 size_t deleted = rel - wrel;
15496
15497 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15498 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15499 if (rel_hdr->sh_size == 0)
15500 {
15501 /* It is too late to remove an empty reloc section. Leave
15502 one NONE reloc.
15503 ??? What is wrong with an empty section??? */
15504 rel_hdr->sh_size = rel_hdr->sh_entsize;
15505 deleted -= 1;
15506 }
15507 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15508 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15509 input_section->reloc_count -= deleted;
15510 }
15511
15512 /* If we're emitting relocations, then shortly after this function
15513 returns, reloc offsets and addends for this section will be
15514 adjusted. Worse, reloc symbol indices will be for the output
15515 file rather than the input. Save a copy of the relocs for
15516 opd_entry_value. */
15517 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15518 {
15519 bfd_size_type amt;
15520 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15521 rel = bfd_alloc (input_bfd, amt);
15522 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15523 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15524 if (rel == NULL)
15525 return FALSE;
15526 memcpy (rel, relocs, amt);
15527 }
15528 return ret;
15529 }
15530
15531 /* Adjust the value of any local symbols in opd sections. */
15532
15533 static int
15534 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15535 const char *name ATTRIBUTE_UNUSED,
15536 Elf_Internal_Sym *elfsym,
15537 asection *input_sec,
15538 struct elf_link_hash_entry *h)
15539 {
15540 struct _opd_sec_data *opd;
15541 long adjust;
15542 bfd_vma value;
15543
15544 if (h != NULL)
15545 return 1;
15546
15547 opd = get_opd_info (input_sec);
15548 if (opd == NULL || opd->adjust == NULL)
15549 return 1;
15550
15551 value = elfsym->st_value - input_sec->output_offset;
15552 if (!bfd_link_relocatable (info))
15553 value -= input_sec->output_section->vma;
15554
15555 adjust = opd->adjust[OPD_NDX (value)];
15556 if (adjust == -1)
15557 return 2;
15558
15559 elfsym->st_value += adjust;
15560 return 1;
15561 }
15562
15563 /* Finish up dynamic symbol handling. We set the contents of various
15564 dynamic sections here. */
15565
15566 static bfd_boolean
15567 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15568 struct bfd_link_info *info,
15569 struct elf_link_hash_entry *h,
15570 Elf_Internal_Sym *sym)
15571 {
15572 struct ppc_link_hash_table *htab;
15573 struct plt_entry *ent;
15574 Elf_Internal_Rela rela;
15575 bfd_byte *loc;
15576
15577 htab = ppc_hash_table (info);
15578 if (htab == NULL)
15579 return FALSE;
15580
15581 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15582 if (ent->plt.offset != (bfd_vma) -1)
15583 {
15584 /* This symbol has an entry in the procedure linkage
15585 table. Set it up. */
15586 if (!htab->elf.dynamic_sections_created
15587 || h->dynindx == -1)
15588 {
15589 BFD_ASSERT (h->type == STT_GNU_IFUNC
15590 && h->def_regular
15591 && (h->root.type == bfd_link_hash_defined
15592 || h->root.type == bfd_link_hash_defweak));
15593 rela.r_offset = (htab->elf.iplt->output_section->vma
15594 + htab->elf.iplt->output_offset
15595 + ent->plt.offset);
15596 if (htab->opd_abi)
15597 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15598 else
15599 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15600 rela.r_addend = (h->root.u.def.value
15601 + h->root.u.def.section->output_offset
15602 + h->root.u.def.section->output_section->vma
15603 + ent->addend);
15604 loc = (htab->elf.irelplt->contents
15605 + (htab->elf.irelplt->reloc_count++
15606 * sizeof (Elf64_External_Rela)));
15607 htab->local_ifunc_resolver = 1;
15608 }
15609 else
15610 {
15611 rela.r_offset = (htab->elf.splt->output_section->vma
15612 + htab->elf.splt->output_offset
15613 + ent->plt.offset);
15614 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15615 rela.r_addend = ent->addend;
15616 loc = (htab->elf.srelplt->contents
15617 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15618 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15619 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15620 htab->maybe_local_ifunc_resolver = 1;
15621 }
15622 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15623
15624 if (!htab->opd_abi)
15625 {
15626 if (!h->def_regular)
15627 {
15628 /* Mark the symbol as undefined, rather than as
15629 defined in glink. Leave the value if there were
15630 any relocations where pointer equality matters
15631 (this is a clue for the dynamic linker, to make
15632 function pointer comparisons work between an
15633 application and shared library), otherwise set it
15634 to zero. */
15635 sym->st_shndx = SHN_UNDEF;
15636 if (!h->pointer_equality_needed)
15637 sym->st_value = 0;
15638 else if (!h->ref_regular_nonweak)
15639 {
15640 /* This breaks function pointer comparisons, but
15641 that is better than breaking tests for a NULL
15642 function pointer. */
15643 sym->st_value = 0;
15644 }
15645 }
15646 }
15647 }
15648
15649 if (h->needs_copy)
15650 {
15651 /* This symbol needs a copy reloc. Set it up. */
15652 asection *srel;
15653
15654 if (h->dynindx == -1
15655 || (h->root.type != bfd_link_hash_defined
15656 && h->root.type != bfd_link_hash_defweak)
15657 || htab->elf.srelbss == NULL
15658 || htab->elf.sreldynrelro == NULL)
15659 abort ();
15660
15661 rela.r_offset = (h->root.u.def.value
15662 + h->root.u.def.section->output_section->vma
15663 + h->root.u.def.section->output_offset);
15664 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15665 rela.r_addend = 0;
15666 if (h->root.u.def.section == htab->elf.sdynrelro)
15667 srel = htab->elf.sreldynrelro;
15668 else
15669 srel = htab->elf.srelbss;
15670 loc = srel->contents;
15671 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15672 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15673 }
15674
15675 return TRUE;
15676 }
15677
15678 /* Used to decide how to sort relocs in an optimal manner for the
15679 dynamic linker, before writing them out. */
15680
15681 static enum elf_reloc_type_class
15682 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15683 const asection *rel_sec,
15684 const Elf_Internal_Rela *rela)
15685 {
15686 enum elf_ppc64_reloc_type r_type;
15687 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15688
15689 if (rel_sec == htab->elf.irelplt)
15690 return reloc_class_ifunc;
15691
15692 r_type = ELF64_R_TYPE (rela->r_info);
15693 switch (r_type)
15694 {
15695 case R_PPC64_RELATIVE:
15696 return reloc_class_relative;
15697 case R_PPC64_JMP_SLOT:
15698 return reloc_class_plt;
15699 case R_PPC64_COPY:
15700 return reloc_class_copy;
15701 default:
15702 return reloc_class_normal;
15703 }
15704 }
15705
15706 /* Finish up the dynamic sections. */
15707
15708 static bfd_boolean
15709 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15710 struct bfd_link_info *info)
15711 {
15712 struct ppc_link_hash_table *htab;
15713 bfd *dynobj;
15714 asection *sdyn;
15715
15716 htab = ppc_hash_table (info);
15717 if (htab == NULL)
15718 return FALSE;
15719
15720 dynobj = htab->elf.dynobj;
15721 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15722
15723 if (htab->elf.dynamic_sections_created)
15724 {
15725 Elf64_External_Dyn *dyncon, *dynconend;
15726
15727 if (sdyn == NULL || htab->elf.sgot == NULL)
15728 abort ();
15729
15730 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15731 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15732 for (; dyncon < dynconend; dyncon++)
15733 {
15734 Elf_Internal_Dyn dyn;
15735 asection *s;
15736
15737 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15738
15739 switch (dyn.d_tag)
15740 {
15741 default:
15742 continue;
15743
15744 case DT_PPC64_GLINK:
15745 s = htab->glink;
15746 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15747 /* We stupidly defined DT_PPC64_GLINK to be the start
15748 of glink rather than the first entry point, which is
15749 what ld.so needs, and now have a bigger stub to
15750 support automatic multiple TOCs. */
15751 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15752 break;
15753
15754 case DT_PPC64_OPD:
15755 s = bfd_get_section_by_name (output_bfd, ".opd");
15756 if (s == NULL)
15757 continue;
15758 dyn.d_un.d_ptr = s->vma;
15759 break;
15760
15761 case DT_PPC64_OPT:
15762 if (htab->do_multi_toc && htab->multi_toc_needed)
15763 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15764 if (htab->has_plt_localentry0)
15765 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15766 break;
15767
15768 case DT_PPC64_OPDSZ:
15769 s = bfd_get_section_by_name (output_bfd, ".opd");
15770 if (s == NULL)
15771 continue;
15772 dyn.d_un.d_val = s->size;
15773 break;
15774
15775 case DT_PLTGOT:
15776 s = htab->elf.splt;
15777 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15778 break;
15779
15780 case DT_JMPREL:
15781 s = htab->elf.srelplt;
15782 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15783 break;
15784
15785 case DT_PLTRELSZ:
15786 dyn.d_un.d_val = htab->elf.srelplt->size;
15787 break;
15788
15789 case DT_TEXTREL:
15790 if (htab->local_ifunc_resolver)
15791 info->callbacks->einfo
15792 (_("%X%P: text relocations and GNU indirect "
15793 "functions will result in a segfault at runtime\n"));
15794 else if (htab->maybe_local_ifunc_resolver)
15795 info->callbacks->einfo
15796 (_("%P: warning: text relocations and GNU indirect "
15797 "functions may result in a segfault at runtime\n"));
15798 continue;
15799 }
15800
15801 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15802 }
15803 }
15804
15805 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15806 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15807 {
15808 /* Fill in the first entry in the global offset table.
15809 We use it to hold the link-time TOCbase. */
15810 bfd_put_64 (output_bfd,
15811 elf_gp (output_bfd) + TOC_BASE_OFF,
15812 htab->elf.sgot->contents);
15813
15814 /* Set .got entry size. */
15815 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15816 }
15817
15818 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15819 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15820 {
15821 /* Set .plt entry size. */
15822 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15823 = PLT_ENTRY_SIZE (htab);
15824 }
15825
15826 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15827 brlt ourselves if emitrelocations. */
15828 if (htab->brlt != NULL
15829 && htab->brlt->reloc_count != 0
15830 && !_bfd_elf_link_output_relocs (output_bfd,
15831 htab->brlt,
15832 elf_section_data (htab->brlt)->rela.hdr,
15833 elf_section_data (htab->brlt)->relocs,
15834 NULL))
15835 return FALSE;
15836
15837 if (htab->glink != NULL
15838 && htab->glink->reloc_count != 0
15839 && !_bfd_elf_link_output_relocs (output_bfd,
15840 htab->glink,
15841 elf_section_data (htab->glink)->rela.hdr,
15842 elf_section_data (htab->glink)->relocs,
15843 NULL))
15844 return FALSE;
15845
15846 if (htab->glink_eh_frame != NULL
15847 && htab->glink_eh_frame->size != 0)
15848 {
15849 bfd_vma val;
15850 bfd_byte *p;
15851 struct map_stub *group;
15852 size_t align = 4;
15853
15854 p = htab->glink_eh_frame->contents;
15855 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15856
15857 for (group = htab->group; group != NULL; group = group->next)
15858 if (group->stub_sec != NULL)
15859 {
15860 /* Offset to stub section. */
15861 val = (group->stub_sec->output_section->vma
15862 + group->stub_sec->output_offset);
15863 val -= (htab->glink_eh_frame->output_section->vma
15864 + htab->glink_eh_frame->output_offset
15865 + (p + 8 - htab->glink_eh_frame->contents));
15866 if (val + 0x80000000 > 0xffffffff)
15867 {
15868 info->callbacks->einfo
15869 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15870 group->stub_sec->name);
15871 return FALSE;
15872 }
15873 bfd_put_32 (dynobj, val, p + 8);
15874 p += stub_eh_frame_size (group, align);
15875 }
15876 if (htab->glink != NULL && htab->glink->size != 0)
15877 {
15878 /* Offset to .glink. */
15879 val = (htab->glink->output_section->vma
15880 + htab->glink->output_offset
15881 + 8);
15882 val -= (htab->glink_eh_frame->output_section->vma
15883 + htab->glink_eh_frame->output_offset
15884 + (p + 8 - htab->glink_eh_frame->contents));
15885 if (val + 0x80000000 > 0xffffffff)
15886 {
15887 info->callbacks->einfo
15888 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15889 htab->glink->name);
15890 return FALSE;
15891 }
15892 bfd_put_32 (dynobj, val, p + 8);
15893 p += (24 + align - 1) & -align;
15894 }
15895
15896 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15897 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15898 htab->glink_eh_frame,
15899 htab->glink_eh_frame->contents))
15900 return FALSE;
15901 }
15902
15903 /* We need to handle writing out multiple GOT sections ourselves,
15904 since we didn't add them to DYNOBJ. We know dynobj is the first
15905 bfd. */
15906 while ((dynobj = dynobj->link.next) != NULL)
15907 {
15908 asection *s;
15909
15910 if (!is_ppc64_elf (dynobj))
15911 continue;
15912
15913 s = ppc64_elf_tdata (dynobj)->got;
15914 if (s != NULL
15915 && s->size != 0
15916 && s->output_section != bfd_abs_section_ptr
15917 && !bfd_set_section_contents (output_bfd, s->output_section,
15918 s->contents, s->output_offset,
15919 s->size))
15920 return FALSE;
15921 s = ppc64_elf_tdata (dynobj)->relgot;
15922 if (s != NULL
15923 && s->size != 0
15924 && s->output_section != bfd_abs_section_ptr
15925 && !bfd_set_section_contents (output_bfd, s->output_section,
15926 s->contents, s->output_offset,
15927 s->size))
15928 return FALSE;
15929 }
15930
15931 return TRUE;
15932 }
15933
15934 #include "elf64-target.h"
15935
15936 /* FreeBSD support */
15937
15938 #undef TARGET_LITTLE_SYM
15939 #undef TARGET_LITTLE_NAME
15940
15941 #undef TARGET_BIG_SYM
15942 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15943 #undef TARGET_BIG_NAME
15944 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15945
15946 #undef ELF_OSABI
15947 #define ELF_OSABI ELFOSABI_FREEBSD
15948
15949 #undef elf64_bed
15950 #define elf64_bed elf64_powerpc_fbsd_bed
15951
15952 #include "elf64-target.h"